From f9ae3e4f2b529a2f59a0fd0f9dae1bb01c94f9a7 Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Thu, 3 Dec 2015 10:44:24 -0800
Subject: [PATCH 001/332] Initial support for globs in tsconfig.json

---
 src/compiler/commandLineParser.ts             | 571 +++++++++++++++++-
 src/compiler/core.ts                          |  70 +++
 src/compiler/diagnosticMessages.json          |   4 +
 src/compiler/sys.ts                           |  46 +-
 src/compiler/types.ts                         |  21 +
 src/harness/external/chai.d.ts                |   3 +
 src/harness/harness.ts                        |  28 +-
 src/harness/harnessLanguageService.ts         |  15 +-
 src/harness/projectsRunner.ts                 |  19 +-
 src/harness/rwcRunner.ts                      |   9 +-
 src/services/shims.ts                         |  62 +-
 .../cases/unittests/cachingInServerLSHost.ts  |  46 +-
 tests/cases/unittests/expandFiles.ts          | 249 ++++++++
 tests/cases/unittests/session.ts              |  30 +-
 14 files changed, 1086 insertions(+), 87 deletions(-)
 create mode 100644 tests/cases/unittests/expandFiles.ts

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 034b7022e82..f850ac00dba 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -495,46 +495,51 @@ namespace ts {
         };
 
         function getFileNames(): string[] {
-            let fileNames: string[] = [];
+            let fileNames: string[];
             if (hasProperty(json, "files")) {
-                if (json["files"] instanceof Array) {
-                    fileNames = map(<string[]>json["files"], s => combinePaths(basePath, s));
+                if (isArray(json["files"])) {
+                    fileNames = <string[]>json["files"];
                 }
                 else {
                     errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
                 }
             }
-            else {
-                const filesSeen: Map<boolean> = {};
-                const exclude = json["exclude"] instanceof Array ? map(<string[]>json["exclude"], normalizeSlashes) : undefined;
-                const supportedExtensions = getSupportedExtensions(options);
-                Debug.assert(indexOf(supportedExtensions, ".ts") < indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
 
-                // Get files of supported extensions in their order of resolution
-                for (const extension of supportedExtensions) {
-                    const filesInDirWithExtension = host.readDirectory(basePath, extension, exclude);
-                    for (const fileName of filesInDirWithExtension) {
-                        // .ts extension would read the .d.ts extension files too but since .d.ts is lower priority extension, 
-                        // lets pick them when its turn comes up
-                        if (extension === ".ts" && fileExtensionIs(fileName, ".d.ts")) {
-                            continue;
-                        }
+            let includeSpecs: string[];
+            if (hasProperty(json, "include")) {
+                if (isArray(json["include"])) {
+                    includeSpecs = <string[]>json["include"];
+                }
+                else {
+                    errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "include", "Array"));
+                }
+            }
 
-                        // If this is one of the output extension (which would be .d.ts and .js if we are allowing compilation of js files)
-                        // do not include this file if we included .ts or .tsx file with same base name as it could be output of the earlier compilation
-                        if (extension === ".d.ts" || (options.allowJs && contains(supportedJavascriptExtensions, extension))) {
-                            const baseName = fileName.substr(0, fileName.length - extension.length);
-                            if (hasProperty(filesSeen, baseName + ".ts") || hasProperty(filesSeen, baseName + ".tsx")) {
-                                continue;
-                            }
-                        }
+            let excludeSpecs: string[];
+            if (hasProperty(json, "exclude")) {
+                if (isArray(json["exclude"])) {
+                    excludeSpecs = <string[]>json["exclude"];
+                }
+                else {
+                    errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "exclude", "Array"));
+                }
+            }
 
-                        filesSeen[fileName] = true;
-                        fileNames.push(fileName);
+            if (fileNames === undefined && includeSpecs === undefined) {
+                includeSpecs = ["**/*.ts"];
+                if (options.jsx) {
+                    includeSpecs.push("**/*.tsx");
+                }
+
+                if (options.allowJs) {
+                    includeSpecs.push("**/*.js");
+                    if (options.jsx) {
+                        includeSpecs.push("**/*.jsx");
                     }
                 }
             }
-            return fileNames;
+
+            return expandFiles(fileNames, includeSpecs, excludeSpecs, basePath, options, host, errors);
         }
     }
 
@@ -584,4 +589,514 @@ namespace ts {
 
         return { options, errors };
     }
+
+    // Simplified whitelist, forces escaping of any non-word (or digit), non-whitespace character.
+    const reservedCharacterPattern = /[^\w\s]/g;
+
+    const enum ExpandResult {
+        Ok,
+        Error
+    }
+
+    /**
+     * Expands an array of file specifications.
+     *
+     * @param fileNames The literal file names to include.
+     * @param includeSpecs The file specifications to expand.
+     * @param excludeSpecs The file specifications to exclude.
+     * @param basePath The base path for any relative file specifications.
+     * @param options Compiler options.
+     * @param host The host used to resolve files and directories.
+     * @param errors An array for diagnostic reporting.
+     */
+    export function expandFiles(fileNames: string[], includeSpecs: string[], excludeSpecs: string[], basePath: string, options: CompilerOptions, host: ParseConfigHost, errors?: Diagnostic[]): string[] {
+        basePath = normalizePath(basePath);
+        basePath = removeTrailingDirectorySeparator(basePath);
+
+        const excludePattern = includeSpecs ? createExcludeRegularExpression(excludeSpecs, basePath, options, host, errors) : undefined;
+        const fileSet = createFileMap<Path>(host.useCaseSensitiveFileNames ? caseSensitiveKeyMapper : caseInsensitiveKeyMapper);
+
+        // include every literal file.
+        if (fileNames) {
+            for (const fileName of fileNames) {
+                const path = toPath(fileName, basePath, caseSensitiveKeyMapper);
+                if (!fileSet.contains(path)) {
+                    fileSet.set(path, path);
+                }
+            }
+        }
+
+        // expand and include the provided files into the file set.
+        if (includeSpecs) {
+            for (let includeSpec of includeSpecs) {
+                includeSpec = normalizePath(includeSpec);
+                includeSpec = removeTrailingDirectorySeparator(includeSpec);
+                expandFileSpec(basePath, includeSpec, 0, excludePattern, options, host, errors, fileSet);
+            }
+        }
+
+        const output = fileSet.reduce(addFileToOutput, []);
+        return output;
+    }
+
+    /**
+     * Expands a file specification with wildcards.
+     *
+     * @param basePath The directory to expand.
+     * @param fileSpec The original file specification.
+     * @param start The starting offset in the file specification.
+     * @param excludePattern A pattern used to exclude a file specification.
+     * @param options Compiler options.
+     * @param host The host used to resolve files and directories.
+     * @param errors An array for diagnostic reporting.
+     * @param fileSet The set of matching files.
+     * @param isExpandingRecursiveDirectory A value indicating whether the file specification includes a recursive directory wildcard prior to the start of this segment.
+     */
+    function expandFileSpec(basePath: string, fileSpec: string, start: number, excludePattern: RegExp, options: CompilerOptions, host: ParseConfigHost, errors: Diagnostic[], fileSet: FileMap<Path>, isExpandingRecursiveDirectory?: boolean): ExpandResult {
+        // Skip expansion if the base path matches an exclude pattern.
+        if (isExcludedPath(excludePattern, basePath)) {
+            return ExpandResult.Ok;
+        }
+
+        // Find the offset of the next wildcard in the file specification
+        let offset = indexOfWildcard(fileSpec, start);
+        if (offset < 0) {
+            // There were no more wildcards, so include the file.
+            const path = toPath(fileSpec.substring(start), basePath, caseSensitiveKeyMapper);
+            includeFile(path, excludePattern, options, host, fileSet);
+            return ExpandResult.Ok;
+        }
+
+        // Find the last directory separator before the wildcard to get the leading path.
+        offset = fileSpec.lastIndexOf(directorySeparator, offset);
+        if (offset > start) {
+            // The wildcard occurs in a later segment, include remaining path up to
+            // wildcard in prefix.
+            basePath = combinePaths(basePath, fileSpec.substring(start, offset));
+
+            // Skip this wildcard path if the base path now matches an exclude pattern.
+            if (isExcludedPath(excludePattern, basePath)) {
+                return ExpandResult.Ok;
+            }
+
+            start = offset + 1;
+        }
+
+        // Find the offset of the next directory separator to extract the wildcard path segment.
+        offset = getEndOfPathSegment(fileSpec, start);
+
+        // Check if the current offset is the beginning of a recursive directory pattern.
+        if (isRecursiveDirectoryWildcard(fileSpec, start, offset)) {
+            if (offset >= fileSpec.length) {
+                // If there is no file specification following the recursive directory pattern
+                // we cannot match any files, so we will ignore this pattern.
+                return ExpandResult.Ok;
+            }
+
+            // Stop expansion if a file specification contains more than one recursive directory pattern.
+            if (isExpandingRecursiveDirectory) {
+                if (errors) {
+                    errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, fileSpec));
+                }
+
+                return ExpandResult.Error;
+            }
+
+            // Expand the recursive directory pattern.
+            return expandRecursiveDirectory(basePath, fileSpec, offset + 1, excludePattern, options, host, errors, fileSet);
+        }
+
+        // Match the entries in the directory against the wildcard pattern.
+        const pattern = createRegularExpressionFromWildcard(fileSpec, start, offset, host);
+
+        // If there are no more directory separators (the offset is at the end of the file specification), then
+        // this must be a file.
+        if (offset >= fileSpec.length) {
+            const files = host.readFileNames(basePath);
+            for (const extension of getSupportedExtensions(options)) {
+                for (const file of files) {
+                    if (fileExtensionIs(file, extension)) {
+                        const path = toPath(file, basePath, caseSensitiveKeyMapper);
+
+                        // .ts extension would read the .d.ts extension files too but since .d.ts is lower priority extension,
+                        // lets pick them when its turn comes up.
+                        if (extension === ".ts" && fileExtensionIs(file, ".d.ts")) {
+                            continue;
+                        }
+
+                        // If this is one of the output extension (which would be .d.ts and .js if we are allowing compilation of js files)
+                        // do not include this file if we included .ts or .tsx file with same base name as it could be output of the earlier compilation
+                        if (extension === ".d.ts" || (options.allowJs && contains(supportedJavascriptExtensions, extension))) {
+                            if (fileSet.contains(changeExtension(path, ".ts")) || fileSet.contains(changeExtension(path, ".tsx"))) {
+                                continue;
+                            }
+                        }
+
+                        // This wildcard has no further directory to process, so include the file.
+                        includeFile(path, excludePattern, options, host, fileSet);
+                    }
+                }
+            }
+        }
+        else {
+            const directories = host.readDirectoryNames(basePath);
+            for (const directory of directories) {
+                // If this was a directory, process the directory.
+                const path = toPath(directory, basePath, caseSensitiveKeyMapper);
+                if (expandFileSpec(path, fileSpec, offset + 1, excludePattern, options, host, errors, fileSet, isExpandingRecursiveDirectory) === ExpandResult.Error) {
+                    return ExpandResult.Error;
+                }
+            }
+        }
+
+        return ExpandResult.Ok;
+    }
+
+    /**
+     * Expands a `**` recursive directory wildcard.
+     *
+     * @param basePath The directory to recursively expand.
+     * @param fileSpec The original file specification.
+     * @param start The starting offset in the file specification.
+     * @param excludePattern A pattern used to exclude a file specification.
+     * @param options Compiler options.
+     * @param host The host used to resolve files and directories.
+     * @param errors An array for diagnostic reporting.
+     * @param fileSet The set of matching files.
+     */
+    function expandRecursiveDirectory(basePath: string, fileSpec: string, start: number, excludePattern: RegExp, options: CompilerOptions, host: ParseConfigHost, errors: Diagnostic[], fileSet: FileMap<Path>): ExpandResult {
+        // expand the non-recursive part of the file specification against the prefix path.
+        if (expandFileSpec(basePath, fileSpec, start, excludePattern, options, host, errors, fileSet, /*isExpandingRecursiveDirectory*/ true) === ExpandResult.Error) {
+            return ExpandResult.Error;
+        }
+
+        // Recursively expand each subdirectory.
+        const directories = host.readDirectoryNames(basePath);
+        for (const entry of directories) {
+            const path = combinePaths(basePath, entry);
+            if (expandRecursiveDirectory(path, fileSpec, start, excludePattern, options, host, errors, fileSet) === ExpandResult.Error) {
+                return ExpandResult.Error;
+            }
+        }
+
+        return ExpandResult.Ok;
+    }
+
+    /**
+     * Attempts to include a file in a file set.
+     *
+     * @param file The file to include.
+     * @param excludePattern A pattern used to exclude a file specification.
+     * @param options Compiler options.
+     * @param host The host used to resolve files and directories.
+     * @param fileSet The set of matching files.
+     */
+    function includeFile(file: Path, excludePattern: RegExp, options: CompilerOptions, host: ParseConfigHost, fileSet: FileMap<Path>): void {
+        // Ignore the file if it should be excluded.
+        if (isExcludedPath(excludePattern, file)) {
+            return;
+        }
+
+        // Ignore the file if it doesn't exist.
+        if (!host.fileExists(file)) {
+            return;
+        }
+
+        // Ignore the file if it does not have a supported extension.
+        if (!options.allowNonTsExtensions && !isSupportedSourceFileName(file, options)) {
+            return;
+        }
+
+        if (!fileSet.contains(file)) {
+            fileSet.set(file, file);
+        }
+    }
+
+    /**
+     * Adds a file to an array of files.
+     *
+     * @param output The output array.
+     * @param file The file path.
+     */
+    function addFileToOutput(output: string[], file: string) {
+        output.push(file);
+        return output;
+    }
+
+    /**
+     * Determines whether a path should be excluded.
+     *
+     * @param excludePattern A pattern used to exclude a file specification.
+     * @param path The path to test for exclusion.
+     */
+    function isExcludedPath(excludePattern: RegExp, path: string) {
+        return excludePattern ? excludePattern.test(path) : false;
+    }
+
+    /**
+     * Creates a regular expression from a glob-style wildcard.
+     *
+     * @param fileSpec The file specification.
+     * @param start The starting offset in the file specification.
+     * @param end The end offset in the file specification.
+     * @param host The host used to resolve files and directories.
+     */
+    function createRegularExpressionFromWildcard(fileSpec: string, start: number, end: number, host: ParseConfigHost): RegExp {
+        const pattern = createPatternFromWildcard(fileSpec, start, end);
+        return new RegExp("^" + pattern + "$", host.useCaseSensitiveFileNames ? "" : "i");
+    }
+
+    /**
+     * Creates a pattern from a wildcard segment.
+     *
+     * @param fileSpec The file specification.
+     * @param start The starting offset in the file specification.
+     * @param end The end offset in the file specification.
+     */
+    function createPatternFromWildcard(fileSpec: string, start: number, end: number): string {
+        let pattern = "";
+        let offset = indexOfWildcard(fileSpec, start);
+        while (offset >= 0 && offset < end) {
+            if (offset > start) {
+                // Escape and append the non-wildcard portion to the regular expression
+                pattern += escapeRegularExpressionText(fileSpec, start, offset);
+            }
+
+            const charCode = fileSpec.charCodeAt(offset);
+            if (charCode === CharacterCodes.asterisk) {
+                // Append a multi-character (zero or more characters) pattern to the regular expression
+                pattern += "[^/]*";
+            }
+            else if (charCode === CharacterCodes.question) {
+                // Append a single-character (zero or one character) pattern to the regular expression
+                pattern += "[^/]";
+            }
+
+            start = offset + 1;
+            offset = indexOfWildcard(fileSpec, start);
+        }
+
+        // Escape and append any remaining non-wildcard portion.
+        if (start < end) {
+            pattern += escapeRegularExpressionText(fileSpec, start, end);
+        }
+
+        return pattern;
+    }
+
+    /**
+     * Creates a regular expression from a glob-style wildcard used to exclude a file.
+     *
+     * @param excludeSpecs The file specifications to exclude.
+     * @param basePath The prefix path.
+     * @param options Compiler options.
+     * @param host The host used to resolve files and directories.
+     * @param errors An array for diagnostic reporting.
+     */
+    function createExcludeRegularExpression(excludeSpecs: string[], basePath: string, options: CompilerOptions, host: ParseConfigHost, errors: Diagnostic[]): RegExp {
+        // Ignore an empty exclusion list
+        if (!excludeSpecs || excludeSpecs.length === 0) {
+            return undefined;
+        }
+
+        basePath = escapeRegularExpressionText(basePath, 0, basePath.length);
+
+        let pattern = "";
+        for (const excludeSpec of excludeSpecs) {
+            const excludePattern = createExcludePattern(excludeSpec, basePath, options, host, errors);
+            if (excludePattern) {
+                if (pattern.length > 0) {
+                    pattern += "|";
+                }
+
+                pattern += "(" + excludePattern + ")";
+            }
+        }
+
+        if (pattern.length > 0) {
+            return new RegExp("^(" + pattern + ")($|/)", host.useCaseSensitiveFileNames ? "" : "i");
+        }
+
+        return undefined;
+    }
+
+    /**
+     * Creates a pattern for used to exclude a file.
+     *
+     * @param excludeSpec The file specification to exclude.
+     * @param basePath The base path for the exclude pattern.
+     * @param options Compiler options.
+     * @param host The host used to resolve files and directories.
+     * @param errors An array for diagnostic reporting.
+     */
+    function createExcludePattern(excludeSpec: string, basePath: string, options: CompilerOptions, host: ParseConfigHost, errors: Diagnostic[]): string {
+        if (!excludeSpec) {
+            return undefined;
+        }
+
+        excludeSpec = normalizePath(excludeSpec);
+        excludeSpec = removeTrailingDirectorySeparator(excludeSpec);
+
+        let pattern = isRootedDiskPath(excludeSpec) ? "" : basePath;
+        let hasRecursiveDirectoryWildcard = false;
+        let segmentStart = 0;
+        let segmentEnd = getEndOfPathSegment(excludeSpec, segmentStart);
+        while (segmentStart < segmentEnd) {
+            if (isRecursiveDirectoryWildcard(excludeSpec, segmentStart, segmentEnd)) {
+                if (hasRecursiveDirectoryWildcard) {
+                    if (errors) {
+                        errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, excludeSpec));
+                    }
+
+                    return undefined;
+                }
+
+                // As an optimization, if the recursive directory is the last
+                // wildcard, or is followed by only `*` or `*.ts`, don't add the
+                // remaining pattern and exit the loop.
+                if (canElideRecursiveDirectorySegment(excludeSpec, segmentEnd, options, host)) {
+                    break;
+                }
+
+                hasRecursiveDirectoryWildcard = true;
+                pattern += "(/.+)?";
+            }
+            else {
+                if (pattern) {
+                    pattern += directorySeparator;
+                }
+
+                pattern += createPatternFromWildcard(excludeSpec, segmentStart, segmentEnd);
+            }
+
+            segmentStart = segmentEnd + 1;
+            segmentEnd = getEndOfPathSegment(excludeSpec, segmentStart);
+        }
+
+        return pattern;
+    }
+
+    /**
+     * Determines whether a recursive directory segment can be elided when
+     * building a regular expression to exclude a path.
+     *
+     * @param excludeSpec The file specification used to exclude a path.
+     * @param segmentEnd The end position of the recursive directory segment.
+     * @param options Compiler options.
+     * @param host The host used to resolve files and directories.
+     */
+    function canElideRecursiveDirectorySegment(excludeSpec: string, segmentEnd: number, options: CompilerOptions, host: ParseConfigHost) {
+        // If there are no segments after this segment, the pattern for this segment may be elided.
+        if (segmentEnd + 1 >= excludeSpec.length) {
+            return true;
+        }
+
+        // If the following segment is a wildcard that may be elided, the pattern for this segment may be elided.
+        return canElideWildcardSegment(excludeSpec, segmentEnd + 1, options, host);
+    }
+
+    /**
+     * Determines whether a wildcard segment can be elided when building a
+     * regular expression to exclude a path.
+     *
+     * @param excludeSpec The file specification used to exclude a path.
+     * @param segmentStart The starting position of the segment.
+     * @param options Compiler options.
+     * @param host The host used to resolve files and directories.
+     */
+    function canElideWildcardSegment(excludeSpec: string, segmentStart: number, options: CompilerOptions, host: ParseConfigHost) {
+        const charCode = excludeSpec.charCodeAt(segmentStart);
+        if (charCode === CharacterCodes.asterisk) {
+            const end = excludeSpec.length;
+
+            // If the segment consists only of `*`, we may elide this segment.
+            if (segmentStart + 1 === end) {
+                return true;
+            }
+
+            // If the segment consists only of `*.ts`, and we do not allow
+            // any other extensions for source files, we may elide this segment.
+            if (!options.allowNonTsExtensions && !options.jsx && !options.allowJs && segmentStart + 4 === end) {
+                const segment = excludeSpec.substr(segmentStart);
+                return fileExtensionIs(host.useCaseSensitiveFileNames ? segment : segment.toLowerCase(), ".ts");
+            }
+        }
+        return false;
+    }
+
+    /**
+     * Escape regular expression reserved tokens.
+     *
+     * @param text The text to escape.
+     * @param start The starting offset in the string.
+     * @param end The ending offset in the string.
+     */
+    function escapeRegularExpressionText(text: string, start: number, end: number) {
+        return text.substring(start, end).replace(reservedCharacterPattern, "\\$&");
+    }
+
+    /**
+     * Determines whether the wildcard at the current offset is a recursive directory wildcard.
+     *
+     * @param fileSpec The file specification.
+     * @param segmentStart The starting offset of a segment in the file specification.
+     * @param segmentEnd The ending offset of a segment in the file specification.
+     */
+    function isRecursiveDirectoryWildcard(fileSpec: string, segmentStart: number, segmentEnd: number) {
+        return segmentEnd - segmentStart === 2 &&
+            fileSpec.charCodeAt(segmentStart) === CharacterCodes.asterisk &&
+            fileSpec.charCodeAt(segmentStart + 1) === CharacterCodes.asterisk;
+    }
+
+    /**
+     * Gets the index of the next wildcard character in a file specification.
+     *
+     * @param fileSpec The file specification.
+     * @param start The starting offset in the file specification.
+     */
+    function indexOfWildcard(fileSpec: string, start: number): number {
+        for (let i = start; i < fileSpec.length; ++i) {
+            const ch = fileSpec.charCodeAt(i);
+            if (ch === CharacterCodes.asterisk || ch === CharacterCodes.question) {
+                return i;
+            }
+        }
+
+        return -1;
+    }
+
+    /**
+     * Get the end position of a path segment, either the index of the next directory separator or
+     * the provided end position.
+     *
+     * @param fileSpec The file specification.
+     * @param segmentStart The start offset in the file specification.
+     */
+    function getEndOfPathSegment(fileSpec: string, segmentStart: number): number {
+        const end = fileSpec.length;
+        if (segmentStart >= end) {
+            return end;
+        }
+
+        const offset = fileSpec.indexOf(directorySeparator, segmentStart);
+        return offset < 0 ? end : offset;
+    }
+
+    /**
+     * Gets a case sensitive key.
+     *
+     * @param key The original key.
+     */
+    function caseSensitiveKeyMapper(key: string) {
+        return key;
+    }
+
+    /**
+     * Gets a case insensitive key.
+     *
+     * @param key The original key.
+     */
+    function caseInsensitiveKeyMapper(key: string) {
+        return key.toLowerCase();
+    }
 }
diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index cae7bd82103..aae4b54b5c7 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -25,6 +25,7 @@ namespace ts {
             contains,
             remove,
             forEachValue: forEachValueInMap,
+            reduce,
             clear
         };
 
@@ -34,6 +35,10 @@ namespace ts {
             }
         }
 
+        function reduce<U>(callback: (memo: U, value: T, key: Path) => U, initial: U) {
+            return reduceProperties(files, callback, initial);
+        }
+
         // path should already be well-formed so it does not need to be normalized
         function get(path: Path): T {
             return files[toKey(path)];
@@ -490,6 +495,24 @@ namespace ts {
         return a < b ? Comparison.LessThan : Comparison.GreaterThan;
     }
 
+    export function compareStrings(a: string, b: string, ignoreCase?: boolean): Comparison {
+        if (a === b) return Comparison.EqualTo;
+        if (a === undefined) return Comparison.LessThan;
+        if (b === undefined) return Comparison.GreaterThan;
+        if (ignoreCase) {
+            if (String.prototype.localeCompare) {
+                const result = a.localeCompare(b, /*locales*/ undefined, { usage: "sort", sensitivity: "accent" });
+                return result < 0 ? Comparison.LessThan : result > 0 ? Comparison.GreaterThan : Comparison.EqualTo;
+            }
+
+            a = a.toUpperCase();
+            b = b.toUpperCase();
+            if (a === b) return Comparison.EqualTo;
+        }
+
+        return a < b ? Comparison.LessThan : Comparison.GreaterThan;
+    }
+
     function getDiagnosticFileName(diagnostic: Diagnostic): string {
         return diagnostic.file ? diagnostic.file.fileName : undefined;
     }
@@ -756,6 +779,49 @@ namespace ts {
         return path1 + directorySeparator + path2;
     }
 
+    /**
+     * Removes a trailing directory separator from a path.
+     * @param path The path.
+     */
+    export function removeTrailingDirectorySeparator(path: string) {
+        if (path.charAt(path.length - 1) === directorySeparator) {
+            return path.substr(0, path.length - 1);
+        }
+
+        return path;
+    }
+
+    /**
+     * Adds a trailing directory separator to a path, if it does not already have one.
+     * @param path The path.
+     */
+    export function ensureTrailingDirectorySeparator(path: string) {
+        if (path.charAt(path.length - 1) !== directorySeparator) {
+            return path + directorySeparator;
+        }
+
+        return path;
+    }
+
+    export function comparePaths(a: string, b: string, currentDirectory: string, ignoreCase?: boolean) {
+        if (a === b) return Comparison.EqualTo;
+        if (a === undefined) return Comparison.LessThan;
+        if (b === undefined) return Comparison.GreaterThan;
+        a = removeTrailingDirectorySeparator(a);
+        b = removeTrailingDirectorySeparator(b);
+        const aComponents = getNormalizedPathComponents(a, currentDirectory);
+        const bComponents = getNormalizedPathComponents(b, currentDirectory);
+        const sharedLength = Math.min(aComponents.length, bComponents.length);
+        for (let i = 0; i < sharedLength; ++i) {
+            const result = compareStrings(aComponents[i], bComponents[i], ignoreCase);
+            if (result !== Comparison.EqualTo) {
+                return result;
+            }
+        }
+
+        return compareValues(aComponents.length, bComponents.length);
+    }
+
     export function fileExtensionIs(path: string, extension: string): boolean {
         const pathLen = path.length;
         const extLen = extension.length;
@@ -794,6 +860,10 @@ namespace ts {
         return path;
     }
 
+    export function changeExtension<T extends string | Path>(path: T, newExtension: string): T {
+        return <T>(removeFileExtension(path) + newExtension);
+    }
+
     const backslashOrDoubleQuote = /[\"\\]/g;
     const escapedCharsRegExp = /[\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
     const escapedCharsMap: Map<string> = {
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 0c19f6d8247..6a1d0e5ce65 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -2020,6 +2020,10 @@
         "category": "Error",
         "code": 5009
     },
+    "File specification cannot contain multiple recursive directory wildcards ('**'): '{0}'.": {
+        "category": "Error",
+        "code": 5011
+    },
     "Cannot read file '{0}': {1}": {
         "category": "Error",
         "code": 5012
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 3a90ca42fa1..fc8e90ac38f 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -17,6 +17,8 @@ namespace ts {
         getExecutingFilePath(): string;
         getCurrentDirectory(): string;
         readDirectory(path: string, extension?: string, exclude?: string[]): string[];
+        readFileNames(path: string): string[];
+        readDirectoryNames(path: string): string[];
         getMemoryUsage?(): number;
         exit(exitCode?: number): void;
     }
@@ -155,6 +157,16 @@ namespace ts {
                 }
             }
 
+            function readFileNames(path: string): string[] {
+                const folder = fso.GetFolder(path || ".");
+                return getNames(folder.files);
+            }
+
+            function readDirectoryNames(path: string): string[] {
+                const folder = fso.GetFolder(path || ".");
+                return getNames(folder.directories);
+            }
+
             return {
                 args,
                 newLine: "\r\n",
@@ -185,6 +197,8 @@ namespace ts {
                     return new ActiveXObject("WScript.Shell").CurrentDirectory;
                 },
                 readDirectory,
+                readFileNames,
+                readDirectoryNames,
                 exit(exitCode?: number): void {
                     try {
                         WScript.Quit(exitCode);
@@ -281,7 +295,7 @@ namespace ts {
             // REVIEW: for now this implementation uses polling.
             // The advantage of polling is that it works reliably
             // on all os and with network mounted files.
-            // For 90 referenced files, the average time to detect 
+            // For 90 referenced files, the average time to detect
             // changes is 2*msInterval (by default 5 seconds).
             // The overhead of this is .04 percent (1/2500) with
             // average pause of < 1 millisecond (and max
@@ -381,6 +395,30 @@ namespace ts {
                 }
             }
 
+            function readFileNames(path: string): string[] {
+                const entries = _fs.readdirSync(path || ".");
+                const files: string[] = [];
+                for (const entry of entries) {
+                    const stat = _fs.statSync(combinePaths(path, entry));
+                    if (stat.isFile()) {
+                        files.push(entry);
+                    }
+                }
+                return files.sort();
+            }
+
+            function readDirectoryNames(path: string): string[] {
+                const entries = _fs.readdirSync(path || ".");
+                const directories: string[] = [];
+                for (const entry of entries) {
+                    const stat = _fs.statSync(combinePaths(path, entry));
+                    if (stat.isDirectory()) {
+                        directories.push(entry);
+                    }
+                }
+                return directories.sort();
+            }
+
             return {
                 args: process.argv.slice(2),
                 newLine: _os.EOL,
@@ -406,7 +444,7 @@ namespace ts {
                     };
                 },
                 watchDirectory: (path, callback, recursive) => {
-                    // Node 4.0 `fs.watch` function supports the "recursive" option on both OSX and Windows 
+                    // Node 4.0 `fs.watch` function supports the "recursive" option on both OSX and Windows
                     // (ref: https://github.com/nodejs/node/pull/2649 and https://github.com/Microsoft/TypeScript/issues/4643)
                     return _fs.watch(
                         path,
@@ -426,7 +464,7 @@ namespace ts {
                     return _path.resolve(path);
                 },
                 fileExists(path: string): boolean {
-                    return _fs.existsSync(path);
+                    return _fs.existsSync(path) && _fs.statSync(path).isFile();
                 },
                 directoryExists(path: string) {
                     return _fs.existsSync(path) && _fs.statSync(path).isDirectory();
@@ -443,6 +481,8 @@ namespace ts {
                     return process.cwd();
                 },
                 readDirectory,
+                readFileNames,
+                readDirectoryNames,
                 getMemoryUsage() {
                     if (global.gc) {
                         global.gc();
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index dbd0322aa18..ffd9ddc206d 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -14,6 +14,7 @@ namespace ts {
         remove(fileName: Path): void;
 
         forEachValue(f: (key: Path, v: T) => void): void;
+        reduce<U>(f: (memo: U, value: T, key: Path) => U, initial: U): U;
         clear(): void;
     }
 
@@ -1582,7 +1583,27 @@ namespace ts {
     }
 
     export interface ParseConfigHost {
+        useCaseSensitiveFileNames: boolean;
+
         readDirectory(rootDir: string, extension: string, exclude: string[]): string[];
+
+        /**
+          * Gets a value indicating whether the specified path exists.
+          * @param path The path to test.
+          */
+        fileExists(path: string): boolean;
+
+        /**
+         * Reads the files names in the directory.
+         * @param rootDir The directory path.
+         */
+        readFileNames(rootDir: string): string[];
+
+        /**
+         * Reads the directory names in the directory.
+         * @param rootDir The directory path.
+         */
+        readDirectoryNames(rootDir: string): string[];
     }
 
     export interface WriteFileCallback {
diff --git a/src/harness/external/chai.d.ts b/src/harness/external/chai.d.ts
index 814de75e7b2..fc25980d3a0 100644
--- a/src/harness/external/chai.d.ts
+++ b/src/harness/external/chai.d.ts
@@ -167,6 +167,9 @@ declare module chai {
     module assert {
         function equal(actual: any, expected: any, message?: string): void;
         function notEqual(actual: any, expected: any, message?: string): void;
+        function deepEqual(actual: any, expected: any, message?: string): void;
+        function notDeepEqual(actual: any, expected: any, message?: string): void;
+        function lengthOf(object: any[], length: number, message?: string): void;
         function isTrue(value: any, message?: string): void;
         function isFalse(value: any, message?: string): void;
         function isNull(value: any, message?: string): void;
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index 15f3813e54d..d8ccc512343 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -1,7 +1,7 @@
 
 //
 // Copyright (c) Microsoft Corporation.  All rights reserved.
-// 
+//
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -282,7 +282,7 @@ namespace Utils {
                         break;
 
                     case "parserContextFlags":
-                        // Clear the flag that are produced by aggregating child values..  That is ephemeral 
+                        // Clear the flag that are produced by aggregating child values..  That is ephemeral
                         // data we don't care about in the dump.  We only care what the parser set directly
                         // on the ast.
                         let value = n.parserContextFlags & ts.ParserContextFlags.ParserGeneratedFlags;
@@ -356,7 +356,7 @@ namespace Utils {
         assert.equal(node1.kind, node2.kind, "node1.kind !== node2.kind");
         assert.equal(node1.flags, node2.flags, "node1.flags !== node2.flags");
 
-        // call this on both nodes to ensure all propagated flags have been set (and thus can be 
+        // call this on both nodes to ensure all propagated flags have been set (and thus can be
         // compared).
         assert.equal(ts.containsParseError(node1), ts.containsParseError(node2));
         assert.equal(node1.parserContextFlags, node2.parserContextFlags, "node1.parserContextFlags !== node2.parserContextFlags");
@@ -436,6 +436,8 @@ namespace Harness {
         getExecutingFilePath(): string;
         exit(exitCode?: number): void;
         readDirectory(path: string, extension?: string, exclude?: string[]): string[];
+        readDirectoryNames(path: string): string[];
+        readFileNames(path: string): string[];
     }
     export var IO: IO;
 
@@ -474,6 +476,8 @@ namespace Harness {
             export const fileExists: typeof IO.fileExists = fso.FileExists;
             export const log: typeof IO.log = global.WScript && global.WScript.StdOut.WriteLine;
             export const readDirectory: typeof IO.readDirectory = (path, extension, exclude) => ts.sys.readDirectory(path, extension, exclude);
+            export const readDirectoryNames: typeof IO.readDirectoryNames = path => ts.sys.readDirectoryNames(path);
+            export const readFileNames: typeof IO.readFileNames = path => ts.sys.readFileNames(path);
 
             export function createDirectory(path: string) {
                 if (directoryExists(path)) {
@@ -544,6 +548,8 @@ namespace Harness {
             export const log: typeof IO.log = s => console.log(s);
 
             export const readDirectory: typeof IO.readDirectory = (path, extension, exclude) => ts.sys.readDirectory(path, extension, exclude);
+            export const readDirectoryNames: typeof IO.readDirectoryNames = path => ts.sys.readDirectoryNames(path);
+            export const readFileNames: typeof IO.readFileNames = path => ts.sys.readFileNames(path);
 
             export function createDirectory(path: string) {
                 if (!directoryExists(path)) {
@@ -752,6 +758,14 @@ namespace Harness {
             export function readDirectory(path: string, extension?: string, exclude?: string[]) {
                 return listFiles(path).filter(f => !extension || ts.fileExtensionIs(f, extension));
             }
+
+            export function readDirectoryNames(path: string): string[] {
+                return [];
+            }
+
+            export function readFileNames(path: string) {
+                return readDirectory(path);
+            }
         }
     }
 
@@ -777,7 +791,7 @@ namespace Harness {
         (emittedFile: string, emittedLine: number, emittedColumn: number, sourceFile: string, sourceLine: number, sourceColumn: number, sourceName: string): void;
     }
 
-    // Settings 
+    // Settings
     export let userSpecifiedRoot = "";
     export let lightMode = false;
 
@@ -816,7 +830,7 @@ namespace Harness {
             fileName: string,
             sourceText: string,
             languageVersion: ts.ScriptTarget) {
-            // We'll only assert invariants outside of light mode. 
+            // We'll only assert invariants outside of light mode.
             const shouldAssertInvariants = !Harness.lightMode;
 
             // Only set the parent nodes if we're asserting invariants.  We don't need them otherwise.
@@ -911,7 +925,7 @@ namespace Harness {
             libFiles?: string;
         }
 
-        // Additional options not already in ts.optionDeclarations 
+        // Additional options not already in ts.optionDeclarations
         const harnessOptionDeclarations: ts.CommandLineOption[] = [
             { name: "allowNonTsExtensions", type: "boolean" },
             { name: "useCaseSensitiveFileNames", type: "boolean" },
@@ -1149,7 +1163,7 @@ namespace Harness {
                 errLines.forEach(e => outputLines.push(e));
 
                 // do not count errors from lib.d.ts here, they are computed separately as numLibraryDiagnostics
-                // if lib.d.ts is explicitly included in input files and there are some errors in it (i.e. because of duplicate identifiers) 
+                // if lib.d.ts is explicitly included in input files and there are some errors in it (i.e. because of duplicate identifiers)
                 // then they will be added twice thus triggering 'total errors' assertion with condition
                 // 'totalErrorsReportedInNonLibraryFiles + numLibraryDiagnostics + numTest262HarnessDiagnostics, diagnostics.length
 
diff --git a/src/harness/harnessLanguageService.ts b/src/harness/harnessLanguageService.ts
index 3c7814df562..e12105e3393 100644
--- a/src/harness/harnessLanguageService.ts
+++ b/src/harness/harnessLanguageService.ts
@@ -259,6 +259,12 @@ namespace Harness.LanguageService {
         readDirectory(rootDir: string, extension: string): string {
             throw new Error("NYI");
         }
+        readDirectoryNames(path: string): string {
+            throw new Error("Not implemented.");
+        }
+        readFileNames(path: string): string {
+            throw new Error("Not implemented.");
+        }
         fileExists(fileName: string) { return this.getScriptInfo(fileName) !== undefined; }
         readFile(fileName: string) {
             const snapshot = this.nativeHost.getScriptSnapshot(fileName);
@@ -572,6 +578,14 @@ namespace Harness.LanguageService {
             throw new Error("Not implemented Yet.");
         }
 
+        readDirectoryNames(path: string): string[] {
+            throw new Error("Not implemented.");
+        }
+
+        readFileNames(path: string): string[] {
+            throw new Error("Not implemented.");
+        }
+
         watchFile(fileName: string, callback: (fileName: string) => void): ts.FileWatcher {
             return { close() { } };
         }
@@ -644,4 +658,3 @@ namespace Harness.LanguageService {
         getPreProcessedFileInfo(fileName: string, fileContents: string): ts.PreProcessedFileInfo { throw new Error("getPreProcessedFileInfo is not available using the server interface."); }
     }
 }
- 
\ No newline at end of file
diff --git a/src/harness/projectsRunner.ts b/src/harness/projectsRunner.ts
index 52102663457..655c2f07c2b 100644
--- a/src/harness/projectsRunner.ts
+++ b/src/harness/projectsRunner.ts
@@ -210,7 +210,14 @@ class ProjectRunner extends RunnerBase {
                 }
 
                 const configObject = result.config;
-                const configParseResult = ts.parseJsonConfigFileContent(configObject, { readDirectory }, ts.getDirectoryPath(configFileName), compilerOptions);
+                const configParseHost: ts.ParseConfigHost = {
+                    useCaseSensitiveFileNames: Harness.IO.useCaseSensitiveFileNames(),
+                    fileExists,
+                    readDirectory,
+                    readDirectoryNames,
+                    readFileNames
+                };
+                const configParseResult = ts.parseJsonConfigFileContent(configObject, configParseHost, ts.getDirectoryPath(configFileName), compilerOptions);
                 if (configParseResult.errors.length > 0) {
                     return {
                         moduleKind,
@@ -237,7 +244,7 @@ class ProjectRunner extends RunnerBase {
                     mapRoot: testCase.resolveMapRoot && testCase.mapRoot ? Harness.IO.resolvePath(testCase.mapRoot) : testCase.mapRoot,
                     sourceRoot: testCase.resolveSourceRoot && testCase.sourceRoot ? Harness.IO.resolvePath(testCase.sourceRoot) : testCase.sourceRoot,
                     module: moduleKind,
-                    moduleResolution: ts.ModuleResolutionKind.Classic, // currently all tests use classic module resolution kind, this will change in the future 
+                    moduleResolution: ts.ModuleResolutionKind.Classic, // currently all tests use classic module resolution kind, this will change in the future
                 };
                 // Set the values specified using json
                 const optionNameMap: ts.Map<ts.CommandLineOption> = {};
@@ -278,6 +285,14 @@ class ProjectRunner extends RunnerBase {
                 return result;
             }
 
+            function readDirectoryNames(path: string) {
+                return Harness.IO.readDirectoryNames(getFileNameInTheProjectTest(path));
+            }
+
+            function readFileNames(path: string) {
+                return Harness.IO.readFileNames(getFileNameInTheProjectTest(path));
+            }
+
             function fileExists(fileName: string): boolean {
                 return Harness.IO.fileExists(getFileNameInTheProjectTest(fileName));
             }
diff --git a/src/harness/rwcRunner.ts b/src/harness/rwcRunner.ts
index ce570a7d6ad..5b4e2a7a3d9 100644
--- a/src/harness/rwcRunner.ts
+++ b/src/harness/rwcRunner.ts
@@ -76,7 +76,14 @@ namespace RWC {
                     if (tsconfigFile) {
                         const tsconfigFileContents = getHarnessCompilerInputUnit(tsconfigFile.path);
                         const parsedTsconfigFileContents = ts.parseConfigFileTextToJson(tsconfigFile.path, tsconfigFileContents.content);
-                        const configParseResult = ts.parseJsonConfigFileContent(parsedTsconfigFileContents.config, Harness.IO, ts.getDirectoryPath(tsconfigFile.path));
+                        const configParseHost: ts.ParseConfigHost = {
+                            useCaseSensitiveFileNames: Harness.IO.useCaseSensitiveFileNames(),
+                            fileExists: Harness.IO.fileExists,
+                            readDirectory: Harness.IO.readDirectory,
+                            readDirectoryNames: Harness.IO.readDirectoryNames,
+                            readFileNames: Harness.IO.readFileNames,
+                        };
+                        const configParseResult = ts.parseJsonConfigFileContent(parsedTsconfigFileContents.config, configParseHost, ts.getDirectoryPath(tsconfigFile.path));
                         fileNames = configParseResult.fileNames;
                         opts.options = ts.extend(opts.options, configParseResult.options);
                     }
diff --git a/src/services/shims.ts b/src/services/shims.ts
index 6b656ea2738..4c35f5aaf1b 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -60,7 +60,7 @@ namespace ts {
         getNewLine?(): string;
         getProjectVersion?(): string;
         useCaseSensitiveFileNames?(): boolean;
-        
+
         getModuleResolutionsForFile?(fileName: string): string;
     }
 
@@ -73,6 +73,9 @@ namespace ts {
          *  when enumerating the directory.
          */
         readDirectory(rootDir: string, extension: string, exclude?: string): string;
+        readDirectoryNames?(rootDir: string): string;
+        readFileNames?(rootDir: string): string;
+        useCaseSensitiveFileNames?: boolean;
     }
 
     ///
@@ -272,12 +275,12 @@ namespace ts {
         private files: string[];
         private loggingEnabled = false;
         private tracingEnabled = false;
-        
+
         public resolveModuleNames: (moduleName: string[], containingFile: string) => ResolvedModule[];
-        
+
         constructor(private shimHost: LanguageServiceShimHost) {
             // if shimHost is a COM object then property check will become method call with no arguments.
-            // 'in' does not have this effect. 
+            // 'in' does not have this effect.
             if ("getModuleResolutionsForFile" in this.shimHost) {
                 this.resolveModuleNames = (moduleNames: string[], containingFile: string) => {
                     let resolutionsInFile = <Map<string>>JSON.parse(this.shimHost.getModuleResolutionsForFile(containingFile));
@@ -407,7 +410,18 @@ namespace ts {
 
     export class CoreServicesShimHostAdapter implements ParseConfigHost {
 
+        public useCaseSensitiveFileNames: boolean;
+
         constructor(private shimHost: CoreServicesShimHost) {
+            if (typeof shimHost.useCaseSensitiveFileNames === "boolean") {
+                this.useCaseSensitiveFileNames = shimHost.useCaseSensitiveFileNames;
+            }
+            else if (sys) {
+                this.useCaseSensitiveFileNames = sys.useCaseSensitiveFileNames;
+            }
+            else {
+                this.useCaseSensitiveFileNames = true;
+            }
         }
 
         public readDirectory(rootDir: string, extension: string, exclude: string[]): string[] {
@@ -424,11 +438,41 @@ namespace ts {
             }
             return JSON.parse(encoded);
         }
-        
+
+        public readDirectoryNames(path: string): string[] {
+            if (this.shimHost.readDirectory) {
+                const encoded = this.shimHost.readDirectoryNames(path);
+                return JSON.parse(encoded);
+            }
+
+            if (sys) {
+                path = normalizePath(path);
+                path = ensureTrailingDirectorySeparator(path);
+                return sys.readDirectoryNames(path);
+            }
+
+            return [];
+        }
+
+        public readFileNames(path: string): string[] {
+            if (this.shimHost.readFileNames) {
+                const encoded = this.shimHost.readFileNames(path);
+                return JSON.parse(encoded);
+            }
+
+            if (sys) {
+                path = normalizePath(path);
+                path = ensureTrailingDirectorySeparator(path);
+                return sys.readFileNames(path);
+            }
+
+            return [];
+        }
+
         public fileExists(fileName: string): boolean {
             return this.shimHost.fileExists(fileName);
         }
-        
+
         public readFile(fileName: string): string {
             return this.shimHost.readFile(fileName);
         }
@@ -940,7 +984,7 @@ namespace ts {
         private forwardJSONCall(actionDescription: string, action: () => any): any {
             return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
         }
-        
+
         public resolveModuleName(fileName: string, moduleName: string, compilerOptionsJson: string): string {
             return this.forwardJSONCall(`resolveModuleName('${fileName}')`, () => {
                 let compilerOptions = <CompilerOptions>JSON.parse(compilerOptionsJson);
@@ -949,14 +993,14 @@ namespace ts {
                     resolvedFileName: result.resolvedModule ? result.resolvedModule.resolvedFileName: undefined,
                     failedLookupLocations: result.failedLookupLocations
                 };
-            }); 
+            });
         }
 
         public getPreProcessedFileInfo(fileName: string, sourceTextSnapshot: IScriptSnapshot): string {
             return this.forwardJSONCall(
                 "getPreProcessedFileInfo('" + fileName + "')",
                 () => {
-                    // for now treat files as JavaScript 
+                    // for now treat files as JavaScript
                     var result = preProcessFile(sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength()), /* readImportFiles */ true, /* detectJavaScriptImports */ true);
                     var convertResult = {
                         referencedFiles: <IFileReference[]>[],
diff --git a/tests/cases/unittests/cachingInServerLSHost.ts b/tests/cases/unittests/cachingInServerLSHost.ts
index 88b44a693b9..f0a138c27a1 100644
--- a/tests/cases/unittests/cachingInServerLSHost.ts
+++ b/tests/cases/unittests/cachingInServerLSHost.ts
@@ -39,6 +39,8 @@ module ts {
             readDirectory: (path: string, extension?: string, exclude?: string[]): string[] => {
                 throw new Error("NYI");
             },
+            readDirectoryNames: (path: string): string[] => { throw new Error("NYI"); },
+            readFileNames: (path: string): string[] => { throw new Error("NYI"); },
             exit: (exitCode?: number) => {
             },
             watchFile: (path, callback) => {
@@ -69,8 +71,8 @@ module ts {
         let projectService = new server.ProjectService(serverHost, logger);
         let rootScriptInfo = projectService.openFile(rootFile, /* openedByClient */true);
         let project = projectService.createInferredProject(rootScriptInfo);
-        project.setProjectOptions( {files: [rootScriptInfo.fileName], compilerOptions: {module: ts.ModuleKind.AMD} } ); 
-        return { 
+        project.setProjectOptions( {files: [rootScriptInfo.fileName], compilerOptions: {module: ts.ModuleKind.AMD} } );
+        return {
             project,
             rootScriptInfo
         };
@@ -87,22 +89,22 @@ module ts {
                 name: "c:/f1.ts",
                 content: `foo()`
             };
-            
+
             let serverHost = createDefaultServerHost({ [root.name]: root, [imported.name]: imported });
             let { project, rootScriptInfo } = createProject(root.name, serverHost);
 
             // ensure that imported file was found
             let diags = project.compilerService.languageService.getSemanticDiagnostics(imported.name);
             assert.equal(diags.length, 1);
-            
+
             let originalFileExists = serverHost.fileExists;
             {
                 // patch fileExists to make sure that disk is not touched
                 serverHost.fileExists = (fileName): boolean => {
-                    assert.isTrue(false, "fileExists should not be called"); 
+                    assert.isTrue(false, "fileExists should not be called");
                     return false;
                 };
-                
+
                 let newContent = `import {x} from "f1"
                 var x: string = 1;`;
                 rootScriptInfo.editContent(0, rootScriptInfo.content.length, newContent);
@@ -123,7 +125,7 @@ module ts {
                 };
                 let newContent = `import {x} from "f2"`;
                 rootScriptInfo.editContent(0, rootScriptInfo.content.length, newContent);
-                
+
                 try {
                     // trigger synchronization to make sure that LSHost will try to find 'f2' module on disk
                     project.compilerService.languageService.getSemanticDiagnostics(imported.name);
@@ -132,7 +134,7 @@ module ts {
                 catch(e) {
                     assert.isTrue(e.message.indexOf(`Could not find file: '${imported.name}'.`) === 0);
                 }
-                
+
                 assert.isTrue(fileExistsIsCalled);
             }
             {
@@ -140,45 +142,45 @@ module ts {
                 serverHost.fileExists = (fileName): boolean => {
                     if (fileName === "lib.d.ts") {
                         return false;
-                    }                    
+                    }
                     fileExistsCalled = true;
                     assert.isTrue(fileName.indexOf('/f1.') !== -1);
                     return originalFileExists(fileName);
                 };
-                
+
                 let newContent = `import {x} from "f1"`;
                 rootScriptInfo.editContent(0, rootScriptInfo.content.length, newContent);
                 project.compilerService.languageService.getSemanticDiagnostics(imported.name);
                 assert.isTrue(fileExistsCalled);
-                
+
                 // setting compiler options discards module resolution cache
                 fileExistsCalled = false;
-                
+
                 let opts = ts.clone(project.projectOptions);
                 opts.compilerOptions = ts.clone(opts.compilerOptions);
                 opts.compilerOptions.target = ts.ScriptTarget.ES5;
                 project.setProjectOptions(opts);
-                
+
                 project.compilerService.languageService.getSemanticDiagnostics(imported.name);
                 assert.isTrue(fileExistsCalled);
             }
         });
-        
+
         it("loads missing files from disk", () => {
             let root: File = {
                 name: 'c:/foo.ts',
                 content: `import {x} from "bar"`
             };
-            
+
             let imported: File = {
                 name: 'c:/bar.d.ts',
                 content: `export var y = 1`
-            };            
-            
+            };
+
             let fileMap: Map<File> = { [root.name]: root };
             let serverHost = createDefaultServerHost(fileMap);
             let originalFileExists = serverHost.fileExists;
-            
+
             let fileExistsCalledForBar = false;
             serverHost.fileExists = fileName => {
                 if (fileName === "lib.d.ts") {
@@ -187,22 +189,22 @@ module ts {
                 if (!fileExistsCalledForBar) {
                     fileExistsCalledForBar = fileName.indexOf("/bar.") !== -1;
                 }
-                
+
                 return originalFileExists(fileName);
             };
-            
+
             let { project, rootScriptInfo } = createProject(root.name, serverHost);
 
             let diags = project.compilerService.languageService.getSemanticDiagnostics(root.name);
             assert.isTrue(fileExistsCalledForBar, "'fileExists' should be called");
             assert.isTrue(diags.length === 1, "one diagnostic expected");
             assert.isTrue(typeof diags[0].messageText === "string" && ((<string>diags[0].messageText).indexOf("Cannot find module") === 0), "should be 'cannot find module' message");
-            
+
             // assert that import will success once file appear on disk
             fileMap[imported.name] = imported;
             fileExistsCalledForBar = false;
             rootScriptInfo.editContent(0, rootScriptInfo.content.length, `import {y} from "bar"`)
-            
+
             diags = project.compilerService.languageService.getSemanticDiagnostics(root.name);
             assert.isTrue(fileExistsCalledForBar, "'fileExists' should be called");
             assert.isTrue(diags.length === 0);
diff --git a/tests/cases/unittests/expandFiles.ts b/tests/cases/unittests/expandFiles.ts
new file mode 100644
index 00000000000..a9d12a73260
--- /dev/null
+++ b/tests/cases/unittests/expandFiles.ts
@@ -0,0 +1,249 @@
+/// <reference path="..\..\..\src\harness\external\mocha.d.ts" />
+/// <reference path="..\..\..\src\harness\harness.ts" />
+
+describe("expandFiles", () => {
+    it("fail", () => {
+        assert.isTrue(false, "just checking");
+    });
+
+    const basePath = "c:/dev/";
+    const caseInsensitiveHost = createMockParseConfigHost(
+        basePath,
+        /*files*/ [
+            "c:/dev/a.ts",
+            "c:/dev/a.d.ts",
+            "c:/dev/a.js",
+            "c:/dev/b.ts",
+            "c:/dev/b.js",
+            "c:/dev/c.d.ts",
+            "c:/dev/z/a.ts",
+            "c:/dev/z/abz.ts",
+            "c:/dev/z/aba.ts",
+            "c:/dev/z/b.ts",
+            "c:/dev/z/bbz.ts",
+            "c:/dev/z/bba.ts",
+            "c:/dev/x/a.ts",
+            "c:/dev/x/aa.ts",
+            "c:/dev/x/b.ts",
+            "c:/dev/x/y/a.ts",
+            "c:/dev/x/y/b.ts"
+        ],
+        /*ignoreCase*/ true);
+
+    const caseSensitiveHost = createMockParseConfigHost(
+        basePath,
+        /*files*/ [
+            "c:/dev/a.ts",
+            "c:/dev/a.d.ts",
+            "c:/dev/a.js",
+            "c:/dev/b.ts",
+            "c:/dev/b.js",
+            "c:/dev/A.ts",
+            "c:/dev/B.ts",
+            "c:/dev/c.d.ts",
+            "c:/dev/z/a.ts",
+            "c:/dev/z/abz.ts",
+            "c:/dev/z/aba.ts",
+            "c:/dev/z/b.ts",
+            "c:/dev/z/bbz.ts",
+            "c:/dev/z/bba.ts",
+            "c:/dev/x/a.ts",
+            "c:/dev/x/b.ts",
+            "c:/dev/x/y/a.ts",
+            "c:/dev/x/y/b.ts",
+        ],
+        /*ignoreCase*/ false);
+
+    const expect = _chai.expect;
+    describe("with literal file list", () => {
+        it("without exclusions", () => {
+            const fileNames = ["a.ts", "b.ts"];
+            const results = ts.expandFiles(fileNames, /*includeSpecs*/ undefined, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/b.ts"]);
+        });
+        it("missing files are still present", () => {
+            const fileNames = ["z.ts", "x.ts"];
+            const results = ts.expandFiles(fileNames, /*includeSpecs*/ undefined, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, ["c:/dev/z.ts", "c:/dev/x.ts"]);
+        });
+        it("are not removed due to excludes", () => {
+            const fileNames = ["a.ts", "b.ts"];
+            const excludeSpecs = ["b.ts"];
+            const results = ts.expandFiles(fileNames, /*includeSpecs*/ undefined, excludeSpecs, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/b.ts"]);
+        });
+    });
+
+    describe("with literal include list", () => {
+        it("without exclusions", () => {
+            const includeSpecs = ["a.ts", "b.ts"];
+            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/b.ts"]);
+        });
+        it("with non .ts file extensions are excluded", () => {
+            const includeSpecs = ["a.js", "b.js"];
+            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, []);
+        });
+        it("with missing files are excluded", () => {
+            const includeSpecs = ["z.ts", "x.ts"];
+            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, []);
+        });
+        it("with literal excludes", () => {
+            const includeSpecs = ["a.ts", "b.ts"];
+            const excludeSpecs = ["b.ts"];
+            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, ["c:/dev/a.ts"]);
+        });
+        it("with wildcard excludes", () => {
+            const includeSpecs = ["a.ts", "b.ts", "z/a.ts", "z/abz.ts", "z/aba.ts", "x/b.ts"];
+            const excludeSpecs = ["*.ts", "z/??z.ts", "*/b.ts"];
+            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, ["c:/dev/z/a.ts", "c:/dev/z/aba.ts"]);
+        });
+        it("with recursive excludes", () => {
+            const includeSpecs = ["a.ts", "b.ts", "x/a.ts", "x/b.ts", "x/y/a.ts", "x/y/b.ts"];
+            const excludeSpecs = ["**/b.ts"];
+            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/x/a.ts", "c:/dev/x/y/a.ts"]);
+        });
+        it("with case sensitive exclude", () => {
+            const includeSpecs = ["B.ts"];
+            const excludeSpecs = ["**/b.ts"];
+            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, basePath, {}, caseSensitiveHost);
+            assert.deepEqual(results, ["c:/dev/B.ts"]);
+        });
+    });
+
+    describe("with wildcard include list", () => {
+        it("same named declarations are excluded", () => {
+            const includeSpecs = ["*.ts"];
+            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/b.ts", "c:/dev/c.d.ts"]);
+        });
+        it("`*` matches only ts files", () => {
+            const includeSpecs = ["*"];
+            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/b.ts", "c:/dev/c.d.ts"]);
+        });
+        it("`?` matches only a single character", () => {
+            const includeSpecs = ["x/?.ts"];
+            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, ["c:/dev/x/a.ts", "c:/dev/x/b.ts"]);
+        });
+        it("with recursive directory", () => {
+            const includeSpecs = ["**/a.ts"];
+            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/x/a.ts", "c:/dev/x/y/a.ts", "c:/dev/z/a.ts"]);
+        });
+        it("case sensitive", () => {
+            const includeSpecs = ["**/A.ts"];
+            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseSensitiveHost);
+            assert.deepEqual(results, ["c:/dev/A.ts"]);
+        });
+        it("with missing files are excluded", () => {
+            const includeSpecs = ["*/z.ts"];
+            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, []);
+        });
+        it("always include literal files", () => {
+            const fileNames = ["a.ts"];
+            const includeSpecs = ["*/z.ts"];
+            const excludeSpecs = ["**/a.ts"];
+            const results = ts.expandFiles(fileNames, includeSpecs, excludeSpecs, basePath, {}, caseInsensitiveHost);
+            assert.deepEqual(results, ["c:/dev/a.ts"]);
+        });
+    });
+
+    function createMockParseConfigHost(basePath: string, files: string[], ignoreCase: boolean): ts.ParseConfigHost {
+        const fileSet: ts.Map<string> = {};
+        const directorySet: ts.Map<{ files: ts.Map<string>; directories: ts.Map<string>; }> = {};
+
+        files.sort((a, b) => ts.comparePaths(a, b, basePath, ignoreCase));
+        for (const file of files) {
+            addFile(ts.getNormalizedAbsolutePath(file, basePath));
+        }
+
+        return {
+            useCaseSensitiveFileNames: !ignoreCase,
+            fileExists,
+            readDirectory,
+            readFileNames,
+            readDirectoryNames
+        };
+
+        function fileExists(path: string): boolean {
+            const fileKey = ignoreCase ? path.toLowerCase() : path;
+            return ts.hasProperty(fileSet, fileKey);
+        }
+
+        function directoryExists(path: string): boolean {
+            const directoryKey = ignoreCase ? path.toLowerCase() : path;
+            return ts.hasProperty(directorySet, directoryKey);
+        }
+
+        function readDirectory(rootDir: string, extension?: string, exclude?: string[]): string[] {
+            throw new Error("Not implemented");
+        }
+
+        function readFileNames(path: string) {
+            const files = getDirectoryEntry(path).files;
+            const result: string[] = [];
+            ts.forEachKey(files, key => { result.push(key); });
+            result.sort((a, b) => ts.compareStrings(a, b, ignoreCase));
+            return result;
+        }
+
+        function readDirectoryNames(path: string) {
+            const directories = getDirectoryEntry(path).directories;
+            const result: string[] = [];
+            ts.forEachKey(directories, key => { result.push(key); });
+            result.sort((a, b) => ts.compareStrings(a, b, ignoreCase));
+            return result;
+        }
+
+        function getDirectoryEntry(path: string) {
+            path = ts.getNormalizedAbsolutePath(path, basePath);
+            path = ts.removeTrailingDirectorySeparator(path);
+            const directoryKey = ignoreCase ? path.toLowerCase() : path;
+            return ts.getProperty(directorySet, directoryKey);
+        }
+
+        function addFile(file: string) {
+            const fileKey = ignoreCase ? file.toLowerCase() : file;
+            if (!ts.hasProperty(fileSet, fileKey)) {
+                fileSet[fileKey] = file;
+                const name = ts.getBaseFileName(file);
+                const parent = ts.getDirectoryPath(file);
+                addToDirectory(parent, name, "file");
+            }
+        }
+
+        function addDirectory(directory: string) {
+            directory = ts.removeTrailingDirectorySeparator(directory);
+            const directoryKey = ignoreCase ? directory.toLowerCase() : directory;
+            if (!ts.hasProperty(directorySet, directoryKey)) {
+                directorySet[directoryKey] = { files: {}, directories: {} };
+                const name = ts.getBaseFileName(directory);
+                const parent = ts.getDirectoryPath(directory);
+                if (parent !== directory) {
+                    addToDirectory(parent, name, "directory");
+                }
+            }
+        }
+
+        function addToDirectory(directory: string, entry: string, type: "file" | "directory") {
+            addDirectory(directory);
+            directory = ts.removeTrailingDirectorySeparator(directory);
+            const directoryKey = ignoreCase ? directory.toLowerCase() : directory;
+            const entryKey = ignoreCase ? entry.toLowerCase() : entry;
+            const directoryEntry = directorySet[directoryKey];
+            const entries = type === "file" ? directoryEntry.files : directoryEntry.directories;
+            if (!ts.hasProperty(entries, entryKey)) {
+                entries[entryKey] = entry;
+            }
+        }
+    }
+});
+
diff --git a/tests/cases/unittests/session.ts b/tests/cases/unittests/session.ts
index c1dfd508942..8e35baa3910 100644
--- a/tests/cases/unittests/session.ts
+++ b/tests/cases/unittests/session.ts
@@ -16,6 +16,8 @@ namespace ts.server {
         getExecutingFilePath(): string { return void 0; },
         getCurrentDirectory(): string { return void 0; },
         readDirectory(): string[] { return []; },
+        readDirectoryNames(): string[] { return []; },
+        readFileNames(): string[] { return []; },
         exit(): void {}
     };
     const mockLogger: Logger = {
@@ -28,7 +30,7 @@ namespace ts.server {
         endGroup(): void {},
         msg(s: string, type?: string): void {},
     };
-    
+
     describe("the Session class", () => {
         let session: Session;
         let lastSent: protocol.Message;
@@ -204,7 +206,7 @@ namespace ts.server {
                 .to.throw(`Protocol handler already exists for command "${command}"`);
             });
         });
-        
+
         describe("event", () => {
             it("can format event responses and send them", () => {
                 const evt = "notify-test";
@@ -315,7 +317,7 @@ namespace ts.server {
                     responseRequired: true
                 }));
             }
-            
+
             send(msg: protocol.Message) {
                 this.client.handle(msg);
             }
@@ -323,7 +325,7 @@ namespace ts.server {
             enqueue(msg: protocol.Request) {
                 this.queue.unshift(msg);
             }
-            
+
             handleRequest(msg: protocol.Request) {
                 let response: protocol.Response;
                 try {
@@ -345,7 +347,7 @@ namespace ts.server {
                 }
             }
         }
-        
+
         class InProcClient {
             private server: InProcSession;
             private seq = 0;
@@ -379,7 +381,7 @@ namespace ts.server {
             connect(session: InProcSession): void {
                 this.server = session;
             }
-            
+
             execute(command: string, args: any, callback: (resp: protocol.Response) => void): void {
                 if (!this.server) {
                     return;
@@ -394,7 +396,7 @@ namespace ts.server {
                 this.callbacks[this.seq] = callback;
             }
         };
-        
+
         it("can be constructed and respond to commands", (done) => {
             const cli = new InProcClient();
             const session = new InProcSession(cli);
@@ -402,23 +404,23 @@ namespace ts.server {
                 data: true
             };
             const toEvent = {
-                data: false    
+                data: false
             };
             let responses = 0;
 
             // Connect the client
             cli.connect(session);
-            
+
             // Add an event handler
             cli.on("testevent", (eventinfo) => {
                 expect(eventinfo).to.equal(toEvent);
                 responses++;
                 expect(responses).to.equal(1);
             });
-            
+
             // Trigger said event from the server
             session.event(toEvent, "testevent");
-            
+
             // Queue an echo command
             cli.execute("echo", toEcho, (resp) => {
                 assert(resp.success, resp.message);
@@ -426,7 +428,7 @@ namespace ts.server {
                 expect(responses).to.equal(2);
                 expect(resp.body).to.deep.equal(toEcho);
             });
-            
+
             // Queue a configure command
             cli.execute("configure", {
                 hostInfo: "unit test",
@@ -436,10 +438,10 @@ namespace ts.server {
             }, (resp) => {
                 assert(resp.success, resp.message);
                 responses++;
-                expect(responses).to.equal(3);                
+                expect(responses).to.equal(3);
                 done();
             });
-            
+
             // Consume the queue and trigger the callbacks
             session.consumeQueue();
         });

From 30575dbd7cc4ac62c044e6d1eef77de3affd11ce Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Mon, 7 Dec 2015 14:58:13 -0800
Subject: [PATCH 002/332] Added caching, more tests

---
 Jakefile.js                           |   3 +-
 src/compiler/commandLineParser.ts     | 484 +++++++++++++++++------
 src/compiler/core.ts                  |  88 ++++-
 src/compiler/diagnosticMessages.json  |   4 +
 src/compiler/types.ts                 |  20 +-
 src/harness/external/chai.d.ts        |   6 +-
 src/harness/harnessLanguageService.ts |   1 +
 src/harness/projectsRunner.ts         |   5 +
 src/harness/rwcRunner.ts              |   1 +
 src/server/editorServices.ts          |  57 ++-
 src/services/shims.ts                 |  13 +
 tests/cases/unittests/expandFiles.ts  | 538 ++++++++++++++++++--------
 12 files changed, 928 insertions(+), 292 deletions(-)

diff --git a/Jakefile.js b/Jakefile.js
index 6243ce8ff97..a3f1d31f268 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -160,7 +160,8 @@ var harnessSources = harnessCoreSources.concat([
     "reuseProgramStructure.ts",
     "cachingInServerLSHost.ts",
     "moduleResolution.ts",
-    "tsconfigParsing.ts"
+    "tsconfigParsing.ts",
+    "expandFiles.ts"
 ].map(function (f) {
     return path.join(unittestsDirectory, f);
 })).concat([
diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index f850ac00dba..6499ec6327f 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -488,13 +488,15 @@ namespace ts {
         const { options: optionsFromJsonConfigFile, errors } = convertCompilerOptionsFromJson(json["compilerOptions"], basePath);
 
         const options = extend(existingOptions, optionsFromJsonConfigFile);
+        const { fileNames, wildcardDirectories } = getFileNames();
         return {
             options,
-            fileNames: getFileNames(),
-            errors
+            fileNames,
+            errors,
+            wildcardDirectories
         };
 
-        function getFileNames(): string[] {
+        function getFileNames(): ExpandResult {
             let fileNames: string[];
             if (hasProperty(json, "files")) {
                 if (isArray(json["files"])) {
@@ -526,17 +528,7 @@ namespace ts {
             }
 
             if (fileNames === undefined && includeSpecs === undefined) {
-                includeSpecs = ["**/*.ts"];
-                if (options.jsx) {
-                    includeSpecs.push("**/*.tsx");
-                }
-
-                if (options.allowJs) {
-                    includeSpecs.push("**/*.js");
-                    if (options.jsx) {
-                        includeSpecs.push("**/*.jsx");
-                    }
-                }
+                includeSpecs = ["**/*"];
             }
 
             return expandFiles(fileNames, includeSpecs, excludeSpecs, basePath, options, host, errors);
@@ -593,11 +585,45 @@ namespace ts {
     // Simplified whitelist, forces escaping of any non-word (or digit), non-whitespace character.
     const reservedCharacterPattern = /[^\w\s]/g;
 
-    const enum ExpandResult {
+    const enum ExpansionState {
         Ok,
         Error
     }
 
+    interface ExpansionContext {
+        /** A pattern used to exclude a file specification.  */
+        excludePattern: RegExp;
+        /** Compiler options. */
+        options: CompilerOptions;
+        /** The host used to resolve files and directories. */
+        host: ParseConfigHost;
+        /** Errors to report. */
+        errors: Diagnostic[];
+        /** The set of literal files. */
+        literalFiles: FileMap<Path>;
+        /** The set of files matching a wildcard. */
+        wildcardFiles: FileMap<Path>;
+        /** Directories to be watched. */
+        wildcardDirectories: FileMap<WatchDirectoryFlags>;
+        /** Supported extensions. */
+        supportedExtensions: string[];
+        /**
+         * Path cache, used to reduce calls to the file system. `true` indicates a file exists,
+         * `false` indicates a file or directory does not exist. A DirectoryResult
+         * indicates the file and subdirectory names in a directory. */
+        cache: FileMap<boolean | DirectoryResult>;
+    }
+
+    const enum FileSystemEntryKind {
+        File,
+        Directory
+    }
+
+    interface DirectoryResult {
+        files?: string[];
+        directories?: string[];
+    }
+
     /**
      * Expands an array of file specifications.
      *
@@ -609,62 +635,118 @@ namespace ts {
      * @param host The host used to resolve files and directories.
      * @param errors An array for diagnostic reporting.
      */
-    export function expandFiles(fileNames: string[], includeSpecs: string[], excludeSpecs: string[], basePath: string, options: CompilerOptions, host: ParseConfigHost, errors?: Diagnostic[]): string[] {
+    export function expandFiles(fileNames: string[], includeSpecs: string[], excludeSpecs: string[], basePath: string, options: CompilerOptions, host: ParseConfigHost, errors?: Diagnostic[]): ExpandResult {
         basePath = normalizePath(basePath);
         basePath = removeTrailingDirectorySeparator(basePath);
 
+        // The exclude spec list is converted into a regular expression, which allows us to quickly
+        // test whether a file or directory should be excluded before recursively traversing the
+        // file system.
         const excludePattern = includeSpecs ? createExcludeRegularExpression(excludeSpecs, basePath, options, host, errors) : undefined;
-        const fileSet = createFileMap<Path>(host.useCaseSensitiveFileNames ? caseSensitiveKeyMapper : caseInsensitiveKeyMapper);
+        const keyMapper = host.useCaseSensitiveFileNames ? caseSensitiveKeyMapper : caseInsensitiveKeyMapper;
 
-        // include every literal file.
+        // Literal file names (provided via the "files" array in tsconfig.json) are stored in a
+        // file map with a possibly invariant key. We use this map later when when including
+        // wildcard paths.
+        const literalFiles = createFileMap<Path>(keyMapper);
+
+        // Wildcard paths (provided via the "includes" array in tscofnig.json) are stored in a
+        // file map with a possibly invariant key. We use this map to store paths matched
+        // via wildcard, and to handle extension priority.
+        const wildcardFiles = createFileMap<Path>(keyMapper);
+
+        // Wildcard directories (provided as part of a wildcard path) are stored in a
+        // file map that marks whether it was a regular wildcard match (with a `*` or `?` token),
+        // or a recursive directory. This information is used by filesystem watchers to monitor for
+        // new entries in these paths.
+        const wildcardDirectories = createFileMap<WatchDirectoryFlags>(keyMapper);
+
+        // To reduce the overhead of disk I/O (and marshalling to managed code when hosted in
+        // Visual Studio), file system queries are cached during the expansion session.
+        // If present, a cache entry can be one of three values:
+        // - A `false` value indicates the file or directory did not exist.
+        // - A `true` value indicates the path is a file and it exists.
+        // - An object value indicates the path is a directory and exists. The object may have
+        //   zero, one, or both of the following properties:
+        //   - A "files" array, which contains the file names in the directory.
+        //   - A "directories" array, which contains the subdirectory names in the directory.
+        const cache = createFileMap<boolean | DirectoryResult>(keyMapper);
+
+        // Rather than requery this for each file and filespec, we querythe supported extensions
+        // once and store it on the expansion context.
+        const supportedExtensions = getSupportedExtensions(options);
+
+        // The expansion context holds references to shared information for the various expansion
+        // operations to reduce the overhead of closures.
+        const context: ExpansionContext = {
+            options,
+            host,
+            errors,
+            excludePattern,
+            literalFiles,
+            wildcardFiles,
+            wildcardDirectories,
+            supportedExtensions,
+            cache
+        };
+
+        // Literal files are always included verbatim. An "include" or "exclude" specification cannot
+        // remove a literal file.
         if (fileNames) {
             for (const fileName of fileNames) {
                 const path = toPath(fileName, basePath, caseSensitiveKeyMapper);
-                if (!fileSet.contains(path)) {
-                    fileSet.set(path, path);
+                if (!literalFiles.contains(path)) {
+                    literalFiles.set(path, path);
                 }
             }
         }
 
-        // expand and include the provided files into the file set.
+        // Each "include" specification is expanded and matching files are added.
         if (includeSpecs) {
             for (let includeSpec of includeSpecs) {
                 includeSpec = normalizePath(includeSpec);
                 includeSpec = removeTrailingDirectorySeparator(includeSpec);
-                expandFileSpec(basePath, includeSpec, 0, excludePattern, options, host, errors, fileSet);
+                expandFileSpec(includeSpec, <Path>basePath, 0, context);
             }
         }
 
-        const output = fileSet.reduce(addFileToOutput, []);
-        return output;
+        return {
+            fileNames: wildcardFiles.reduce(addFileToOutput, literalFiles.reduce(addFileToOutput, [])),
+            wildcardDirectories: wildcardDirectories.reduce<Map<WatchDirectoryFlags>>(addDirectoryToOutput, {}),
+        };
     }
 
     /**
      * Expands a file specification with wildcards.
      *
-     * @param basePath The directory to expand.
      * @param fileSpec The original file specification.
+     * @param basePath The directory to expand. This path must exist.
      * @param start The starting offset in the file specification.
-     * @param excludePattern A pattern used to exclude a file specification.
-     * @param options Compiler options.
-     * @param host The host used to resolve files and directories.
-     * @param errors An array for diagnostic reporting.
-     * @param fileSet The set of matching files.
+     * @param context The expansion context.
      * @param isExpandingRecursiveDirectory A value indicating whether the file specification includes a recursive directory wildcard prior to the start of this segment.
      */
-    function expandFileSpec(basePath: string, fileSpec: string, start: number, excludePattern: RegExp, options: CompilerOptions, host: ParseConfigHost, errors: Diagnostic[], fileSet: FileMap<Path>, isExpandingRecursiveDirectory?: boolean): ExpandResult {
+    function expandFileSpec(fileSpec: string, basePath: Path, start: number, context: ExpansionContext, isExpandingRecursiveDirectory?: boolean): ExpansionState {
+        // A file specification must always point to a file. As a result, we always assume the
+        // path segment following the last directory separator points to a file. The only
+        // exception is when the final path segment is the recursive directory pattern "**", in
+        // which case we report an error.
+        const { host, options, errors, wildcardFiles, wildcardDirectories, excludePattern, cache, supportedExtensions } = context;
+
         // Skip expansion if the base path matches an exclude pattern.
-        if (isExcludedPath(excludePattern, basePath)) {
-            return ExpandResult.Ok;
+        if (isExcludedPath(basePath, excludePattern)) {
+            return ExpansionState.Ok;
         }
 
-        // Find the offset of the next wildcard in the file specification
+        // Find the offset of the next wildcard in the file specification. If there are no more
+        // wildcards, we can include the file if it exists and isn't excluded.
         let offset = indexOfWildcard(fileSpec, start);
         if (offset < 0) {
-            // There were no more wildcards, so include the file.
             const path = toPath(fileSpec.substring(start), basePath, caseSensitiveKeyMapper);
-            includeFile(path, excludePattern, options, host, fileSet);
-            return ExpandResult.Ok;
+            if (!isExcludedPath(path, excludePattern) && pathExists(path, FileSystemEntryKind.File, context)) {
+                includeFile(path, context, /*wildcardHasExtension*/ true);
+            }
+
+            return ExpansionState.Ok;
         }
 
         // Find the last directory separator before the wildcard to get the leading path.
@@ -672,11 +754,11 @@ namespace ts {
         if (offset > start) {
             // The wildcard occurs in a later segment, include remaining path up to
             // wildcard in prefix.
-            basePath = combinePaths(basePath, fileSpec.substring(start, offset));
+            basePath = toPath(fileSpec.substring(start, offset), basePath, caseSensitiveKeyMapper);
 
             // Skip this wildcard path if the base path now matches an exclude pattern.
-            if (isExcludedPath(excludePattern, basePath)) {
-                return ExpandResult.Ok;
+            if (isExcludedPath(basePath, excludePattern) || !pathExists(basePath, FileSystemEntryKind.Directory, context)) {
+                return ExpansionState.Ok;
             }
 
             start = offset + 1;
@@ -687,23 +769,34 @@ namespace ts {
 
         // Check if the current offset is the beginning of a recursive directory pattern.
         if (isRecursiveDirectoryWildcard(fileSpec, start, offset)) {
-            if (offset >= fileSpec.length) {
-                // If there is no file specification following the recursive directory pattern
-                // we cannot match any files, so we will ignore this pattern.
-                return ExpandResult.Ok;
-            }
-
             // Stop expansion if a file specification contains more than one recursive directory pattern.
             if (isExpandingRecursiveDirectory) {
                 if (errors) {
                     errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, fileSpec));
                 }
 
-                return ExpandResult.Error;
+                return ExpansionState.Error;
             }
 
+            if (offset >= fileSpec.length) {
+                // If there is no file specification following the recursive directory pattern
+                // then we report an error as we cannot match any files.
+                if (errors) {
+                    errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, fileSpec));
+                }
+
+                return ExpansionState.Error;
+            }
+
+            // Keep track of the recursive wildcard directory
+            wildcardDirectories.set(basePath, WatchDirectoryFlags.Recursive);
+
             // Expand the recursive directory pattern.
-            return expandRecursiveDirectory(basePath, fileSpec, offset + 1, excludePattern, options, host, errors, fileSet);
+            return expandRecursiveDirectory(fileSpec, basePath, offset + 1, context);
+        }
+
+        if (!isExpandingRecursiveDirectory) {
+            wildcardDirectories.set(basePath, WatchDirectoryFlags.None);
         }
 
         // Match the entries in the directory against the wildcard pattern.
@@ -712,103 +805,224 @@ namespace ts {
         // If there are no more directory separators (the offset is at the end of the file specification), then
         // this must be a file.
         if (offset >= fileSpec.length) {
-            const files = host.readFileNames(basePath);
-            for (const extension of getSupportedExtensions(options)) {
-                for (const file of files) {
-                    if (fileExtensionIs(file, extension)) {
-                        const path = toPath(file, basePath, caseSensitiveKeyMapper);
+            const wildcardHasExtension = fileSegmentHasExtension(fileSpec, start);
+            const fileNames = readDirectory(basePath, FileSystemEntryKind.File, context);
+            for (const fileName of fileNames) {
+                // Skip the file if it doesn't match the pattern.
+                if (!pattern.test(fileName)) {
+                    continue;
+                }
 
-                        // .ts extension would read the .d.ts extension files too but since .d.ts is lower priority extension,
-                        // lets pick them when its turn comes up.
-                        if (extension === ".ts" && fileExtensionIs(file, ".d.ts")) {
-                            continue;
-                        }
+                const path = toPath(fileName, basePath, caseSensitiveKeyMapper);
 
-                        // If this is one of the output extension (which would be .d.ts and .js if we are allowing compilation of js files)
-                        // do not include this file if we included .ts or .tsx file with same base name as it could be output of the earlier compilation
-                        if (extension === ".d.ts" || (options.allowJs && contains(supportedJavascriptExtensions, extension))) {
-                            if (fileSet.contains(changeExtension(path, ".ts")) || fileSet.contains(changeExtension(path, ".tsx"))) {
-                                continue;
-                            }
-                        }
+                // If we have excluded this path, we should skip the file.
+                if (isExcludedPath(path, excludePattern)) {
+                    continue;
+                }
 
-                        // This wildcard has no further directory to process, so include the file.
-                        includeFile(path, excludePattern, options, host, fileSet);
+                // This wildcard has no further directory to process, so include the file.
+                includeFile(path, context, wildcardHasExtension);
+            }
+        }
+        else {
+            const directoryNames = readDirectory(basePath, FileSystemEntryKind.Directory, context);
+            for (const directoryName of directoryNames) {
+                if (pattern.test(directoryName)) {
+                    const newBasePath = toPath(directoryName, basePath, caseSensitiveKeyMapper);
+
+                    // Expand the entries in this directory.
+                    if (expandFileSpec(fileSpec, newBasePath, offset + 1, context, isExpandingRecursiveDirectory) === ExpansionState.Error) {
+                        return ExpansionState.Error;
                     }
                 }
             }
         }
-        else {
-            const directories = host.readDirectoryNames(basePath);
-            for (const directory of directories) {
-                // If this was a directory, process the directory.
-                const path = toPath(directory, basePath, caseSensitiveKeyMapper);
-                if (expandFileSpec(path, fileSpec, offset + 1, excludePattern, options, host, errors, fileSet, isExpandingRecursiveDirectory) === ExpandResult.Error) {
-                    return ExpandResult.Error;
-                }
-            }
-        }
 
-        return ExpandResult.Ok;
+        return ExpansionState.Ok;
     }
 
     /**
      * Expands a `**` recursive directory wildcard.
      *
-     * @param basePath The directory to recursively expand.
      * @param fileSpec The original file specification.
+     * @param basePath The directory to recursively expand.
      * @param start The starting offset in the file specification.
-     * @param excludePattern A pattern used to exclude a file specification.
-     * @param options Compiler options.
-     * @param host The host used to resolve files and directories.
-     * @param errors An array for diagnostic reporting.
-     * @param fileSet The set of matching files.
+     * @param context The expansion context.
      */
-    function expandRecursiveDirectory(basePath: string, fileSpec: string, start: number, excludePattern: RegExp, options: CompilerOptions, host: ParseConfigHost, errors: Diagnostic[], fileSet: FileMap<Path>): ExpandResult {
-        // expand the non-recursive part of the file specification against the prefix path.
-        if (expandFileSpec(basePath, fileSpec, start, excludePattern, options, host, errors, fileSet, /*isExpandingRecursiveDirectory*/ true) === ExpandResult.Error) {
-            return ExpandResult.Error;
+    function expandRecursiveDirectory(fileSpec: string, basePath: Path, start: number, context: ExpansionContext): ExpansionState {
+        // Skip the directory if it is excluded.
+        if (isExcludedPath(basePath, context.excludePattern)) {
+            return ExpansionState.Ok;
+        }
+
+        // Expand the non-recursive part of the file specification against the prefix path.
+        if (expandFileSpec(fileSpec, basePath, start, context, /*isExpandingRecursiveDirectory*/ true) === ExpansionState.Error) {
+            return ExpansionState.Error;
         }
 
         // Recursively expand each subdirectory.
-        const directories = host.readDirectoryNames(basePath);
-        for (const entry of directories) {
-            const path = combinePaths(basePath, entry);
-            if (expandRecursiveDirectory(path, fileSpec, start, excludePattern, options, host, errors, fileSet) === ExpandResult.Error) {
-                return ExpandResult.Error;
+        const directoryNames = readDirectory(basePath, FileSystemEntryKind.Directory, context);
+        for (const directoryName of directoryNames) {
+            const newBasePath = toPath(directoryName, basePath, caseSensitiveKeyMapper);
+            if (expandRecursiveDirectory(fileSpec, newBasePath, start, context) === ExpansionState.Error) {
+                return ExpansionState.Error;
             }
         }
 
-        return ExpandResult.Ok;
+        return ExpansionState.Ok;
     }
 
     /**
      * Attempts to include a file in a file set.
      *
      * @param file The file to include.
-     * @param excludePattern A pattern used to exclude a file specification.
-     * @param options Compiler options.
-     * @param host The host used to resolve files and directories.
-     * @param fileSet The set of matching files.
+     * @param context The expansion context.
+     * @param wildcardHasExtension A value indicating whether the wildcard supplied an explicit extension.
      */
-    function includeFile(file: Path, excludePattern: RegExp, options: CompilerOptions, host: ParseConfigHost, fileSet: FileMap<Path>): void {
-        // Ignore the file if it should be excluded.
-        if (isExcludedPath(excludePattern, file)) {
-            return;
-        }
-
-        // Ignore the file if it doesn't exist.
-        if (!host.fileExists(file)) {
-            return;
-        }
+    function includeFile(file: Path, context: ExpansionContext, wildcardHasExtension: boolean): void {
+        const { options, literalFiles, wildcardFiles, excludePattern, supportedExtensions } = context;
 
         // Ignore the file if it does not have a supported extension.
-        if (!options.allowNonTsExtensions && !isSupportedSourceFileName(file, options)) {
+        if ((!wildcardHasExtension || !options.allowNonTsExtensions) && !isSupportedSourceFileName(file, options)) {
             return;
         }
 
-        if (!fileSet.contains(file)) {
-            fileSet.set(file, file);
+        // If we have already included a literal or wildcard path with a
+        // higher priority extension, we should skip this file.
+        //
+        // This handles cases where we may encounter both <file>.ts and
+        // <file>.d.ts (or <file>.js if "allowJs" is enabled) in the same
+        // directory when they are compilation outputs.
+        const extensionPriority = getExtensionPriority(file, supportedExtensions);
+        if (hasFileWithHigherPriorityExtension(file, extensionPriority, context)) {
+            return;
+        }
+
+        // We may have included a wildcard path with a lower priority
+        // extension due to the user-defined order of entries in the
+        // "include" array. If there is a lower priority extension in the
+        // same directory, we should remove it.
+        removeWildcardFilesWithLowerPriorityExtension(file, extensionPriority, context);
+
+        if (!literalFiles.contains(file) && !wildcardFiles.contains(file)) {
+            wildcardFiles.set(file, file);
+        }
+    }
+
+    /**
+     * Tests whether a path exists and is a specific kind of item. Results are
+     * cached for performance.
+     *
+     * @param path The path to tests.
+     * @param kind The kind of file system entry to find.
+     * @param context The expansion context.
+     */
+    function pathExists(path: Path, kind: FileSystemEntryKind, context: ExpansionContext) {
+        const { cache, host } = context;
+        const entry = cache.get(path);
+        if (entry === false) {
+            // If the entry is strictly `false` then the path doesn`t exist, regardless of its kind.
+            return false;
+        }
+        else if (entry === true) {
+            // If the entry is strictly `true` then a file exists at this path.
+            return kind === FileSystemEntryKind.File;
+        }
+        else if (typeof entry === "object") {
+            // If the entry is an object, then a directory exists at this path.
+            return kind === FileSystemEntryKind.Directory;
+        }
+        else {
+            // The entry does not exist in the cache, so we need to check the host.
+            if (kind === FileSystemEntryKind.File) {
+                const result = host.fileExists(path);
+                cache.set(path, result);
+                return result;
+            }
+            else if (kind === FileSystemEntryKind.Directory) {
+                const result = host.directoryExists(path);
+                cache.set(path, result ? {} : false);
+                return result;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Reads the contents of a directory for a specific kind of item. Results are
+     * cached for performance.
+     *
+     * @param basePath The path to the directory. The path must already exist.
+     * @param kind The kind of file system entry to find.
+     * @param context The expansion context.
+     */
+    function readDirectory(basePath: Path, kind: FileSystemEntryKind, context: ExpansionContext) {
+        const { cache, host } = context;
+
+        let entry = cache.get(basePath);
+        if (entry === undefined) {
+            entry = {};
+            cache.set(basePath, entry);
+        }
+
+        if (typeof entry === "object") {
+            if (kind === FileSystemEntryKind.File) {
+                if (entry.files === undefined) {
+                    entry.files = host.readFileNames(basePath);
+                }
+
+                return entry.files;
+            }
+            else if (kind === FileSystemEntryKind.Directory) {
+                if (entry.directories === undefined) {
+                    entry.directories = host.readDirectoryNames(basePath);
+                }
+
+                return entry.directories;
+            }
+        }
+
+        return [];
+    }
+
+    /**
+     * Determines whether a literal or wildcard file has already been included that has a higher
+     * extension priority.
+     *
+     * @param file The path to the file.
+     * @param extensionPriority The priority of the extension.
+     * @param context The expansion context.
+     */
+    function hasFileWithHigherPriorityExtension(file: Path, extensionPriority: ExtensionPriority, context: ExpansionContext) {
+        const { literalFiles, wildcardFiles, supportedExtensions } = context;
+        const adjustedExtensionPriority = adjustExtensionPriority(extensionPriority);
+        for (let i = ExtensionPriority.Highest; i < adjustedExtensionPriority; ++i) {
+            const higherPriorityExtension = supportedExtensions[i];
+            const higherPriorityPath = changeExtension(file, higherPriorityExtension);
+            if (literalFiles.contains(higherPriorityPath) || wildcardFiles.contains(higherPriorityPath)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+    /**
+     * Removes files included via wildcard expansion with a lower extension priority that have
+     * already been included.
+     *
+     * @param file The path to the file.
+     * @param extensionPriority The priority of the extension.
+     * @param context The expansion context.
+     */
+    function removeWildcardFilesWithLowerPriorityExtension(file: Path, extensionPriority: ExtensionPriority, context: ExpansionContext) {
+        const { wildcardFiles, supportedExtensions } = context;
+        const nextExtensionPriority = getNextLowestExtensionPriority(extensionPriority);
+        for (let i = nextExtensionPriority; i < supportedExtensions.length; ++i) {
+            const lowerPriorityExtension = supportedExtensions[i];
+            const lowerPriorityPath = changeExtension(file, lowerPriorityExtension);
+            wildcardFiles.remove(lowerPriorityPath);
         }
     }
 
@@ -823,16 +1037,48 @@ namespace ts {
         return output;
     }
 
+    /**
+     * Adds a watched directory to an output map.
+     *
+     * @param output The output map.
+     * @param flags The directory flags.
+     * @param directory The directory path.
+     */
+    function addDirectoryToOutput(output: Map<WatchDirectoryFlags>, flags: WatchDirectoryFlags, directory: string) {
+        output[directory] = flags;
+        return output;
+    }
+
     /**
      * Determines whether a path should be excluded.
      *
-     * @param excludePattern A pattern used to exclude a file specification.
      * @param path The path to test for exclusion.
+     * @param excludePattern A pattern used to exclude a file specification.
      */
-    function isExcludedPath(excludePattern: RegExp, path: string) {
+    function isExcludedPath(path: string, excludePattern: RegExp) {
         return excludePattern ? excludePattern.test(path) : false;
     }
 
+    /**
+     * Determines whether a file segment contains a valid extension.
+     *
+     * @param fileSpec The file specification.
+     * @param segmentStart The offset to the start of the file segment in the specification.
+     */
+    function fileSegmentHasExtension(fileSpec: string, segmentStart: number) {
+        // if the final path segment does not have a . token, the file does not have an extension.
+        if (fileSpec.indexOf(".", segmentStart) === -1) {
+            return false;
+        }
+
+        // if the extension for the final path segment is (".*"), then the file does not have an extension.
+        if (fileExtensionIs(fileSpec, ".*")) {
+            return false;
+        }
+
+        return true;
+    }
+
     /**
      * Creates a regular expression from a glob-style wildcard.
      *
@@ -858,17 +1104,17 @@ namespace ts {
         let offset = indexOfWildcard(fileSpec, start);
         while (offset >= 0 && offset < end) {
             if (offset > start) {
-                // Escape and append the non-wildcard portion to the regular expression
+                // Escape and append the non-wildcard portion to the regular expression.
                 pattern += escapeRegularExpressionText(fileSpec, start, offset);
             }
 
             const charCode = fileSpec.charCodeAt(offset);
             if (charCode === CharacterCodes.asterisk) {
-                // Append a multi-character (zero or more characters) pattern to the regular expression
-                pattern += "[^/]*";
+                // Append a multi-character (zero or more characters) pattern to the regular expression.
+                pattern += "[^/]*?";
             }
             else if (charCode === CharacterCodes.question) {
-                // Append a single-character (zero or one character) pattern to the regular expression
+                // Append a single-character pattern to the regular expression.
                 pattern += "[^/]";
             }
 
@@ -1054,8 +1300,8 @@ namespace ts {
      * @param fileSpec The file specification.
      * @param start The starting offset in the file specification.
      */
-    function indexOfWildcard(fileSpec: string, start: number): number {
-        for (let i = start; i < fileSpec.length; ++i) {
+    function indexOfWildcard(fileSpec: string, start: number, end: number = fileSpec.length): number {
+        for (let i = start; i < end; ++i) {
             const ch = fileSpec.charCodeAt(i);
             if (ch === CharacterCodes.asterisk || ch === CharacterCodes.question) {
                 return i;
diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index aae4b54b5c7..998766e8d9d 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -26,7 +26,8 @@ namespace ts {
             remove,
             forEachValue: forEachValueInMap,
             reduce,
-            clear
+            clear,
+            mergeFrom
         };
 
         function forEachValueInMap(f: (key: Path, value: T) => void) {
@@ -61,6 +62,16 @@ namespace ts {
             files = {};
         }
 
+        function mergeFrom(other: FileMap<T>) {
+            other.forEachValue(mergeFromOther);
+        }
+
+        function mergeFromOther(key: Path, value: T) {
+            if (!contains(key)) {
+                set(key, value);
+            }
+        }
+
         function toKey(path: Path): string {
             return keyMapper ? keyMapper(path) : path;
         }
@@ -822,6 +833,28 @@ namespace ts {
         return compareValues(aComponents.length, bComponents.length);
     }
 
+    export function containsPath(parent: string, child: string, currentDirectory: string, ignoreCase?: boolean) {
+        if (parent === undefined || child === undefined) return false;
+        if (parent === child) return true;
+        parent = removeTrailingDirectorySeparator(parent);
+        child = removeTrailingDirectorySeparator(child);
+        if (parent === child) return true;
+        const parentComponents = getNormalizedPathComponents(parent, currentDirectory);
+        const childComponents = getNormalizedPathComponents(child, currentDirectory);
+        if (childComponents.length < parentComponents.length) {
+            return false;
+        }
+
+        for (let i = 0; i < parentComponents.length; ++i) {
+            const result = compareStrings(parentComponents[i], childComponents[i], ignoreCase);
+            if (result !== Comparison.EqualTo) {
+                return false;
+            }
+        }
+
+        return true;
+    }
+
     export function fileExtensionIs(path: string, extension: string): boolean {
         const pathLen = path.length;
         const extLen = extension.length;
@@ -850,6 +883,59 @@ namespace ts {
         return false;
     }
 
+    /**
+     * Extension boundaries by priority. Lower numbers indicate higher priorities, and are
+     * aligned to the offset of the highest priority extension in the
+     * allSupportedExtensions array.
+     */
+    export const enum ExtensionPriority {
+        TypeScriptFiles = 0,
+        DeclarationAndJavaScriptFiles = 2,
+        Limit = 5,
+
+        Highest = TypeScriptFiles,
+        Lowest = DeclarationAndJavaScriptFiles,
+    }
+
+    export function getExtensionPriority(path: string, supportedExtensions: string[]): ExtensionPriority {
+        for (let i = supportedExtensions.length - 1; i >= 0; i--) {
+            if (fileExtensionIs(path, supportedExtensions[i])) {
+                return adjustExtensionPriority(<ExtensionPriority>i);
+            }
+        }
+
+        // If its not in the list of supported extensions, this is likely a
+        // TypeScript file with a non-ts extension
+        return ExtensionPriority.Highest;
+    }
+
+    /**
+     * Adjusts an extension priority to be the highest priority within the same range.
+     */
+    export function adjustExtensionPriority(extensionPriority: ExtensionPriority): ExtensionPriority {
+        if (extensionPriority < ExtensionPriority.DeclarationAndJavaScriptFiles) {
+            return ExtensionPriority.TypeScriptFiles;
+        }
+        else if (extensionPriority < ExtensionPriority.Limit) {
+            return ExtensionPriority.DeclarationAndJavaScriptFiles;
+        }
+        else {
+            return ExtensionPriority.Limit;
+        }
+    }
+
+    /**
+     * Gets the next lowest extension priority for a given priority.
+     */
+    export function getNextLowestExtensionPriority(extensionPriority: ExtensionPriority): ExtensionPriority {
+        if (extensionPriority < ExtensionPriority.DeclarationAndJavaScriptFiles) {
+            return ExtensionPriority.DeclarationAndJavaScriptFiles;
+        }
+        else {
+            return ExtensionPriority.Limit;
+        }
+    }
+
     const extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
     export function removeFileExtension(path: string): string {
         for (const ext of extensionsToRemove) {
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 6a1d0e5ce65..c607bace4ef 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -2020,6 +2020,10 @@
         "category": "Error",
         "code": 5009
     },
+    "File specification cannot end in a recursive directory wildcard ('**'): '{0}'.": {
+        "category": "Error",
+        "code": 5010
+    },
     "File specification cannot contain multiple recursive directory wildcards ('**'): '{0}'.": {
         "category": "Error",
         "code": 5011
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index ffd9ddc206d..3d16f70d049 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -15,6 +15,7 @@ namespace ts {
 
         forEachValue(f: (key: Path, v: T) => void): void;
         reduce<U>(f: (memo: U, value: T, key: Path) => U, initial: U): U;
+        mergeFrom(other: FileMap<T>): void;
         clear(): void;
     }
 
@@ -1588,11 +1589,17 @@ namespace ts {
         readDirectory(rootDir: string, extension: string, exclude: string[]): string[];
 
         /**
-          * Gets a value indicating whether the specified path exists.
+          * Gets a value indicating whether the specified path exists and is a file.
           * @param path The path to test.
           */
         fileExists(path: string): boolean;
 
+        /**
+          * Gets a value indicating whether the specified path exists and is a directory.
+          * @param path The path to test.
+          */
+        directoryExists(path: string): boolean;
+
         /**
          * Reads the files names in the directory.
          * @param rootDir The directory path.
@@ -2460,6 +2467,17 @@ namespace ts {
         options: CompilerOptions;
         fileNames: string[];
         errors: Diagnostic[];
+        wildcardDirectories?: Map<WatchDirectoryFlags>;
+    }
+
+    export const enum WatchDirectoryFlags {
+        None = 0,
+        Recursive = 1 << 0,
+    }
+
+    export interface ExpandResult {
+        fileNames: string[];
+        wildcardDirectories: Map<WatchDirectoryFlags>;
     }
 
     /* @internal */
diff --git a/src/harness/external/chai.d.ts b/src/harness/external/chai.d.ts
index fc25980d3a0..fba0024d254 100644
--- a/src/harness/external/chai.d.ts
+++ b/src/harness/external/chai.d.ts
@@ -167,12 +167,14 @@ declare module chai {
     module assert {
         function equal(actual: any, expected: any, message?: string): void;
         function notEqual(actual: any, expected: any, message?: string): void;
-        function deepEqual(actual: any, expected: any, message?: string): void;
-        function notDeepEqual(actual: any, expected: any, message?: string): void;
+        function deepEqual<T>(actual: T, expected: T, message?: string): void;
+        function notDeepEqual<T>(actual: T, expected: T, message?: string): void;
         function lengthOf(object: any[], length: number, message?: string): void;
         function isTrue(value: any, message?: string): void;
         function isFalse(value: any, message?: string): void;
         function isNull(value: any, message?: string): void;
         function isNotNull(value: any, message?: string): void;
+        function isUndefined(value: any, message?: string): void;
+        function isDefined(value: any, message?: string): void;
     }
 }
\ No newline at end of file
diff --git a/src/harness/harnessLanguageService.ts b/src/harness/harnessLanguageService.ts
index e12105e3393..521d17cfc8f 100644
--- a/src/harness/harnessLanguageService.ts
+++ b/src/harness/harnessLanguageService.ts
@@ -266,6 +266,7 @@ namespace Harness.LanguageService {
             throw new Error("Not implemented.");
         }
         fileExists(fileName: string) { return this.getScriptInfo(fileName) !== undefined; }
+        directoryExists(directoryName: string) { return false; }
         readFile(fileName: string) {
             const snapshot = this.nativeHost.getScriptSnapshot(fileName);
             return snapshot && snapshot.getText(0, snapshot.getLength());
diff --git a/src/harness/projectsRunner.ts b/src/harness/projectsRunner.ts
index 655c2f07c2b..76c7952428a 100644
--- a/src/harness/projectsRunner.ts
+++ b/src/harness/projectsRunner.ts
@@ -213,6 +213,7 @@ class ProjectRunner extends RunnerBase {
                 const configParseHost: ts.ParseConfigHost = {
                     useCaseSensitiveFileNames: Harness.IO.useCaseSensitiveFileNames(),
                     fileExists,
+                    directoryExists,
                     readDirectory,
                     readDirectoryNames,
                     readFileNames
@@ -297,6 +298,10 @@ class ProjectRunner extends RunnerBase {
                 return Harness.IO.fileExists(getFileNameInTheProjectTest(fileName));
             }
 
+            function directoryExists(directoryName: string): boolean {
+                return Harness.IO.directoryExists(getFileNameInTheProjectTest(directoryName));
+            }
+
             function getSourceFileText(fileName: string): string {
                 let text: string = undefined;
                 try {
diff --git a/src/harness/rwcRunner.ts b/src/harness/rwcRunner.ts
index 5b4e2a7a3d9..826f6b67260 100644
--- a/src/harness/rwcRunner.ts
+++ b/src/harness/rwcRunner.ts
@@ -79,6 +79,7 @@ namespace RWC {
                         const configParseHost: ts.ParseConfigHost = {
                             useCaseSensitiveFileNames: Harness.IO.useCaseSensitiveFileNames(),
                             fileExists: Harness.IO.fileExists,
+                            directoryExists: Harness.IO.directoryExists,
                             readDirectory: Harness.IO.readDirectory,
                             readDirectoryNames: Harness.IO.readDirectoryNames,
                             readFileNames: Harness.IO.readFileNames,
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 0305b7595c2..0e1c1c97f03 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -119,7 +119,7 @@ namespace ts.server {
                 if (!resolution) {
                     const existingResolution = currentResolutionsInFile && ts.lookUp(currentResolutionsInFile, moduleName);
                     if (moduleResolutionIsValid(existingResolution)) {
-                        // ok, it is safe to use existing module resolution results  
+                        // ok, it is safe to use existing module resolution results
                         resolution = existingResolution;
                     }
                     else {
@@ -144,8 +144,8 @@ namespace ts.server {
                 }
 
                 if (resolution.resolvedModule) {
-                    // TODO: consider checking failedLookupLocations  
-                    // TODO: use lastCheckTime to track expiration for module name resolution 
+                    // TODO: consider checking failedLookupLocations
+                    // TODO: use lastCheckTime to track expiration for module name resolution
                     return true;
                 }
 
@@ -354,6 +354,7 @@ namespace ts.server {
     export interface ProjectOptions {
         // these fields can be present in the project file
         files?: string[];
+        wildcardDirectories?: ts.Map<ts.WatchDirectoryFlags>;
         compilerOptions?: ts.CompilerOptions;
     }
 
@@ -362,6 +363,7 @@ namespace ts.server {
         projectFilename: string;
         projectFileWatcher: FileWatcher;
         directoryWatcher: FileWatcher;
+        directoriesWatchedForWildcards: Map<FileWatcher>;
         // Used to keep track of what directories are watched for this project
         directoriesWatchedForTsconfig: string[] = [];
         program: ts.Program;
@@ -510,7 +512,7 @@ namespace ts.server {
         openFileRootsConfigured: ScriptInfo[] = [];
         // a path to directory watcher map that detects added tsconfig files
         directoryWatchersForTsconfig: ts.Map<FileWatcher> = {};
-        // count of how many projects are using the directory watcher. If the 
+        // count of how many projects are using the directory watcher. If the
         // number becomes 0 for a watcher, then we should close it.
         directoryWatchersRefCount: ts.Map<number> = {};
         hostConfiguration: HostConfiguration;
@@ -590,11 +592,11 @@ namespace ts.server {
             // We check if the project file list has changed. If so, we update the project.
             if (!arrayIsEqualTo(currentRootFiles && currentRootFiles.sort(), newRootFiles && newRootFiles.sort())) {
                 // For configured projects, the change is made outside the tsconfig file, and
-                // it is not likely to affect the project for other files opened by the client. We can 
+                // it is not likely to affect the project for other files opened by the client. We can
                 // just update the current project.
                 this.updateConfiguredProject(project);
 
-                // Call updateProjectStructure to clean up inferred projects we may have 
+                // Call updateProjectStructure to clean up inferred projects we may have
                 // created for the new files
                 this.updateProjectStructure();
             }
@@ -739,6 +741,8 @@ namespace ts.server {
             if (project.isConfiguredProject()) {
                 project.projectFileWatcher.close();
                 project.directoryWatcher.close();
+                forEachValue(project.directoriesWatchedForWildcards, watcher => { watcher.close(); });
+                delete project.directoriesWatchedForWildcards;
                 this.configuredProjects = copyListRemovingItem(project, this.configuredProjects);
             }
             else {
@@ -816,8 +820,8 @@ namespace ts.server {
           * @param info The file that has been closed or newly configured
           */
         closeOpenFile(info: ScriptInfo) {
-            // Closing file should trigger re-reading the file content from disk. This is 
-            // because the user may chose to discard the buffer content before saving 
+            // Closing file should trigger re-reading the file content from disk. This is
+            // because the user may chose to discard the buffer content before saving
             // to the disk, and the server's version of the file can be out of sync.
             info.svc.reloadFromFile(info.fileName);
 
@@ -915,8 +919,8 @@ namespace ts.server {
         }
 
         /**
-         * This function is to update the project structure for every projects. 
-         * It is called on the premise that all the configured projects are 
+         * This function is to update the project structure for every projects.
+         * It is called on the premise that all the configured projects are
          * up to date.
          */
         updateProjectStructure() {
@@ -970,7 +974,7 @@ namespace ts.server {
 
                 if (rootFile.defaultProject && rootFile.defaultProject.isConfiguredProject()) {
                     // If the root file has already been added into a configured project,
-                    // meaning the original inferred project is gone already. 
+                    // meaning the original inferred project is gone already.
                     if (!rootedProject.isConfiguredProject()) {
                         this.removeProject(rootedProject);
                     }
@@ -1075,9 +1079,9 @@ namespace ts.server {
         }
 
         /**
-         * This function tries to search for a tsconfig.json for the given file. If we found it, 
+         * This function tries to search for a tsconfig.json for the given file. If we found it,
          * we first detect if there is already a configured project created for it: if so, we re-read
-         * the tsconfig file content and update the project; otherwise we create a new one. 
+         * the tsconfig file content and update the project; otherwise we create a new one.
          */
         openOrUpdateConfiguredProjectForFile(fileName: string) {
             const searchPath = ts.normalizePath(getDirectoryPath(fileName));
@@ -1215,7 +1219,8 @@ namespace ts.server {
                 else {
                     const projectOptions: ProjectOptions = {
                         files: parsedCommandLine.fileNames,
-                        compilerOptions: parsedCommandLine.options
+                        wildcardDirectories: parsedCommandLine.wildcardDirectories,
+                        compilerOptions: parsedCommandLine.options,
                     };
                     return { succeeded: true, projectOptions };
                 }
@@ -1241,12 +1246,30 @@ namespace ts.server {
                 }
                 project.finishGraph();
                 project.projectFileWatcher = this.host.watchFile(configFilename, _ => this.watchedProjectConfigFileChanged(project));
-                this.log("Add recursive watcher for: " + ts.getDirectoryPath(configFilename));
+
+                const configDirectoryPath = ts.getDirectoryPath(configFilename);
+
+                this.log("Add recursive watcher for: " + configDirectoryPath);
                 project.directoryWatcher = this.host.watchDirectory(
-                    ts.getDirectoryPath(configFilename),
+                    configDirectoryPath,
                     path => this.directoryWatchedForSourceFilesChanged(project, path),
                     /*recursive*/ true
                 );
+
+                project.directoriesWatchedForWildcards = reduceProperties(projectOptions.wildcardDirectories, (watchers, flag, directory) => {
+                    if (comparePaths(configDirectoryPath, directory, ".", !this.host.useCaseSensitiveFileNames) !== Comparison.EqualTo) {
+                        const recursive = (flag & WatchDirectoryFlags.Recursive) !== 0;
+                        this.log(`Add ${ recursive ? "recursive " : ""}watcher for: ${directory}`);
+                        watchers[directory] = this.host.watchDirectory(
+                            directory,
+                            path => this.directoryWatchedForSourceFilesChanged(project, path),
+                            recursive
+                        );
+                    }
+
+                    return watchers;
+                }, <Map<FileWatcher>>{});
+
                 return { success: true, project: project };
             }
         }
@@ -1280,7 +1303,7 @@ namespace ts.server {
                             info = this.openFile(fileName, /*openedByClient*/ false);
                         }
                         else {
-                            // if the root file was opened by client, it would belong to either 
+                            // if the root file was opened by client, it would belong to either
                             // openFileRoots or openFileReferenced.
                             if (info.isOpen) {
                                 if (this.openFileRoots.indexOf(info) >= 0) {
diff --git a/src/services/shims.ts b/src/services/shims.ts
index 4c35f5aaf1b..a7f85d24452 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -75,6 +75,7 @@ namespace ts {
         readDirectory(rootDir: string, extension: string, exclude?: string): string;
         readDirectoryNames?(rootDir: string): string;
         readFileNames?(rootDir: string): string;
+        directoryExists?(path: string): boolean;
         useCaseSensitiveFileNames?: boolean;
     }
 
@@ -473,6 +474,18 @@ namespace ts {
             return this.shimHost.fileExists(fileName);
         }
 
+        public directoryExists(directoryName: string): boolean {
+            if (this.shimHost.directoryExists) {
+                return this.shimHost.directoryExists(directoryName);
+            }
+
+            if (sys) {
+                return sys.directoryExists(directoryName);
+            }
+
+            return false;
+        }
+
         public readFile(fileName: string): string {
             return this.shimHost.readFile(fileName);
         }
diff --git a/tests/cases/unittests/expandFiles.ts b/tests/cases/unittests/expandFiles.ts
index a9d12a73260..3aac938f178 100644
--- a/tests/cases/unittests/expandFiles.ts
+++ b/tests/cases/unittests/expandFiles.ts
@@ -1,164 +1,395 @@
 /// <reference path="..\..\..\src\harness\external\mocha.d.ts" />
 /// <reference path="..\..\..\src\harness\harness.ts" />
 
-describe("expandFiles", () => {
-    it("fail", () => {
-        assert.isTrue(false, "just checking");
-    });
+namespace ts {
+    const caseInsensitiveBasePath = "c:/dev/";
+    const caseInsensitiveHost = createMockParseConfigHost(/*ignoreCase*/ true, caseInsensitiveBasePath, [
+        "a.ts",
+        "a.d.ts",
+        "a.js",
+        "b.ts",
+        "b.js",
+        "c.d.ts",
+        "z/a.ts",
+        "z/abz.ts",
+        "z/aba.ts",
+        "z/b.ts",
+        "z/bbz.ts",
+        "z/bba.ts",
+        "x/a.ts",
+        "x/aa.ts",
+        "x/b.ts",
+        "x/y/a.ts",
+        "x/y/b.ts",
+        "js/a.js",
+        "js/b.js",
+    ]);
 
-    const basePath = "c:/dev/";
-    const caseInsensitiveHost = createMockParseConfigHost(
-        basePath,
-        /*files*/ [
-            "c:/dev/a.ts",
-            "c:/dev/a.d.ts",
-            "c:/dev/a.js",
-            "c:/dev/b.ts",
-            "c:/dev/b.js",
-            "c:/dev/c.d.ts",
-            "c:/dev/z/a.ts",
-            "c:/dev/z/abz.ts",
-            "c:/dev/z/aba.ts",
-            "c:/dev/z/b.ts",
-            "c:/dev/z/bbz.ts",
-            "c:/dev/z/bba.ts",
-            "c:/dev/x/a.ts",
-            "c:/dev/x/aa.ts",
-            "c:/dev/x/b.ts",
-            "c:/dev/x/y/a.ts",
-            "c:/dev/x/y/b.ts"
-        ],
-        /*ignoreCase*/ true);
+    const caseSensitiveBasePath = "/dev/";
+    const caseSensitiveHost = createMockParseConfigHost(/*ignoreCase*/ false, caseSensitiveBasePath, [
+        "a.ts",
+        "a.d.ts",
+        "a.js",
+        "b.ts",
+        "b.js",
+        "A.ts",
+        "B.ts",
+        "c.d.ts",
+        "z/a.ts",
+        "z/abz.ts",
+        "z/aba.ts",
+        "z/b.ts",
+        "z/bbz.ts",
+        "z/bba.ts",
+        "x/a.ts",
+        "x/b.ts",
+        "x/y/a.ts",
+        "x/y/b.ts",
+        "js/a.js",
+        "js/b.js",
+    ]);
 
-    const caseSensitiveHost = createMockParseConfigHost(
-        basePath,
-        /*files*/ [
-            "c:/dev/a.ts",
-            "c:/dev/a.d.ts",
-            "c:/dev/a.js",
-            "c:/dev/b.ts",
-            "c:/dev/b.js",
-            "c:/dev/A.ts",
-            "c:/dev/B.ts",
-            "c:/dev/c.d.ts",
-            "c:/dev/z/a.ts",
-            "c:/dev/z/abz.ts",
-            "c:/dev/z/aba.ts",
-            "c:/dev/z/b.ts",
-            "c:/dev/z/bbz.ts",
-            "c:/dev/z/bba.ts",
-            "c:/dev/x/a.ts",
-            "c:/dev/x/b.ts",
-            "c:/dev/x/y/a.ts",
-            "c:/dev/x/y/b.ts",
-        ],
-        /*ignoreCase*/ false);
+    const caseInsensitiveMixedExtensionHost = createMockParseConfigHost(/*ignoreCase*/ true, caseInsensitiveBasePath, [
+        "a.ts",
+        "a.d.ts",
+        "a.js",
+        "b.tsx",
+        "b.d.ts",
+        "b.jsx",
+        "c.tsx",
+        "c.js",
+        "d.js",
+        "e.jsx",
+        "f.other"
+    ]);
 
-    const expect = _chai.expect;
-    describe("with literal file list", () => {
-        it("without exclusions", () => {
-            const fileNames = ["a.ts", "b.ts"];
-            const results = ts.expandFiles(fileNames, /*includeSpecs*/ undefined, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/b.ts"]);
+    describe("expandFiles", () => {
+        describe("with literal file list", () => {
+            it("without exclusions", () => {
+                const fileNames = ["a.ts", "b.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["c:/dev/a.ts", "c:/dev/b.ts"],
+                    wildcardDirectories: {},
+                };
+                const actual = ts.expandFiles(fileNames, /*includeSpecs*/ undefined, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("missing files are still present", () => {
+                const fileNames = ["z.ts", "x.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["c:/dev/z.ts", "c:/dev/x.ts"],
+                    wildcardDirectories: {},
+                };
+                const actual = ts.expandFiles(fileNames, /*includeSpecs*/ undefined, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("are not removed due to excludes", () => {
+                const fileNames = ["a.ts", "b.ts"];
+                const excludeSpecs = ["b.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["c:/dev/a.ts", "c:/dev/b.ts"],
+                    wildcardDirectories: {},
+                };
+                const actual = ts.expandFiles(fileNames, /*includeSpecs*/ undefined, excludeSpecs, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
         });
-        it("missing files are still present", () => {
-            const fileNames = ["z.ts", "x.ts"];
-            const results = ts.expandFiles(fileNames, /*includeSpecs*/ undefined, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, ["c:/dev/z.ts", "c:/dev/x.ts"]);
+
+        describe("with literal include list", () => {
+            it("without exclusions", () => {
+                const includeSpecs = ["a.ts", "b.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["c:/dev/a.ts", "c:/dev/b.ts"],
+                    wildcardDirectories: {},
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("with non .ts file extensions are excluded", () => {
+                const includeSpecs = ["a.js", "b.js"];
+                const expected: ts.ExpandResult = {
+                    fileNames: [],
+                    wildcardDirectories: {},
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("with missing files are excluded", () => {
+                const includeSpecs = ["z.ts", "x.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: [],
+                    wildcardDirectories: {},
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("with literal excludes", () => {
+                const includeSpecs = ["a.ts", "b.ts"];
+                const excludeSpecs = ["b.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["c:/dev/a.ts"],
+                    wildcardDirectories: {},
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("with wildcard excludes", () => {
+                const includeSpecs = ["a.ts", "b.ts", "z/a.ts", "z/abz.ts", "z/aba.ts", "x/b.ts"];
+                const excludeSpecs = ["*.ts", "z/??z.ts", "*/b.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["c:/dev/z/a.ts", "c:/dev/z/aba.ts"],
+                    wildcardDirectories: {},
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("with recursive excludes", () => {
+                const includeSpecs = ["a.ts", "b.ts", "x/a.ts", "x/b.ts", "x/y/a.ts", "x/y/b.ts"];
+                const excludeSpecs = ["**/b.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["c:/dev/a.ts", "c:/dev/x/a.ts", "c:/dev/x/y/a.ts"],
+                    wildcardDirectories: {},
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("with case sensitive exclude", () => {
+                const includeSpecs = ["B.ts"];
+                const excludeSpecs = ["**/b.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["/dev/B.ts"],
+                    wildcardDirectories: {},
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, caseSensitiveBasePath, {}, caseSensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
         });
-        it("are not removed due to excludes", () => {
-            const fileNames = ["a.ts", "b.ts"];
-            const excludeSpecs = ["b.ts"];
-            const results = ts.expandFiles(fileNames, /*includeSpecs*/ undefined, excludeSpecs, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/b.ts"]);
+
+        describe("with wildcard include list", () => {
+            it("same named declarations are excluded", () => {
+                const includeSpecs = ["*.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["c:/dev/a.ts", "c:/dev/b.ts", "c:/dev/c.d.ts"],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.None
+                    },
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("`*` matches only ts files", () => {
+                const includeSpecs = ["*"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["c:/dev/a.ts", "c:/dev/b.ts", "c:/dev/c.d.ts"],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.None
+                    },
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("`?` matches only a single character", () => {
+                const includeSpecs = ["x/?.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["c:/dev/x/a.ts", "c:/dev/x/b.ts"],
+                    wildcardDirectories: {
+                        "c:/dev/x": ts.WatchDirectoryFlags.None
+                    },
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("with recursive directory", () => {
+                const includeSpecs = ["**/a.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["c:/dev/a.ts", "c:/dev/x/a.ts", "c:/dev/x/y/a.ts", "c:/dev/z/a.ts"],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.Recursive
+                    },
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("case sensitive", () => {
+                const includeSpecs = ["**/A.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["/dev/A.ts"],
+                    wildcardDirectories: {
+                        "/dev": ts.WatchDirectoryFlags.Recursive
+                    },
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseSensitiveBasePath, {}, caseSensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("with missing files are excluded", () => {
+                const includeSpecs = ["*/z.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: [],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.None
+                    },
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("always include literal files", () => {
+                const fileNames = ["a.ts"];
+                const includeSpecs = ["*/z.ts"];
+                const excludeSpecs = ["**/a.ts"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["c:/dev/a.ts"],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.None
+                    },
+                };
+                const actual = ts.expandFiles(fileNames, includeSpecs, excludeSpecs, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("exclude folders", () => {
+                const includeSpecs = ["**/*"];
+                const excludeSpecs = ["z", "x"];
+                const expected: ts.ExpandResult = {
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/b.ts",
+                        "c:/dev/c.d.ts"
+                    ],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.Recursive
+                    }
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("exclude .js files when allowJs=false", () => {
+                const includeSpecs = ["js/*"];
+                const expected: ts.ExpandResult = {
+                    fileNames: [],
+                    wildcardDirectories: {
+                        "c:/dev/js": ts.WatchDirectoryFlags.None
+                    }
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+            it("include .js files when allowJs=true", () => {
+                const includeSpecs = ["js/*"];
+                const expected: ts.ExpandResult = {
+                    fileNames: ["c:/dev/js/a.js", "c:/dev/js/b.js"],
+                    wildcardDirectories: {
+                        "c:/dev/js": ts.WatchDirectoryFlags.None
+                    }
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, { allowJs: true }, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
+        });
+
+        describe("when called from parseJsonConfigFileContent", () => {
+            it("with jsx=none, allowJs=false", () => {
+                const json: any = {
+                    "compilerOptions": {
+                        "jsx": "none",
+                        "allowJs": false
+                    }
+                };
+                const expected: ts.ExpandResult = {
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/b.tsx",
+                        "c:/dev/c.tsx",
+                    ],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.Recursive
+                    }
+                };
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
+                assert.deepEqual(actual.fileNames, expected.fileNames);
+                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+            });
+            it("with jsx=preserve, allowJs=false", () => {
+                const json: any = {
+                    "compilerOptions": {
+                        "jsx": "preserve",
+                        "allowJs": false
+                    }
+                };
+                const expected: ts.ExpandResult = {
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/b.tsx",
+                        "c:/dev/c.tsx",
+                    ],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.Recursive
+                    }
+                };
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
+                assert.deepEqual(actual.fileNames, expected.fileNames);
+                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+            });
+            it("with jsx=none, allowJs=true", () => {
+                const json: any = {
+                    "compilerOptions": {
+                        "jsx": "none",
+                        "allowJs": true
+                    }
+                };
+                const expected: ts.ExpandResult = {
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/b.tsx",
+                        "c:/dev/c.tsx",
+                        "c:/dev/d.js",
+                        "c:/dev/e.jsx",
+                    ],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.Recursive
+                    }
+                };
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
+                assert.deepEqual(actual.fileNames, expected.fileNames);
+                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+            });
+            it("with jsx=preserve, allowJs=true", () => {
+                const json: any = {
+                    "compilerOptions": {
+                        "jsx": "preserve",
+                        "allowJs": true
+                    }
+                };
+                const expected: ts.ExpandResult = {
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/b.tsx",
+                        "c:/dev/c.tsx",
+                        "c:/dev/d.js",
+                        "c:/dev/e.jsx",
+                    ],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.Recursive
+                    }
+                };
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
+                assert.deepEqual(actual.fileNames, expected.fileNames);
+                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+            });
         });
     });
 
-    describe("with literal include list", () => {
-        it("without exclusions", () => {
-            const includeSpecs = ["a.ts", "b.ts"];
-            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/b.ts"]);
-        });
-        it("with non .ts file extensions are excluded", () => {
-            const includeSpecs = ["a.js", "b.js"];
-            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, []);
-        });
-        it("with missing files are excluded", () => {
-            const includeSpecs = ["z.ts", "x.ts"];
-            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, []);
-        });
-        it("with literal excludes", () => {
-            const includeSpecs = ["a.ts", "b.ts"];
-            const excludeSpecs = ["b.ts"];
-            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, ["c:/dev/a.ts"]);
-        });
-        it("with wildcard excludes", () => {
-            const includeSpecs = ["a.ts", "b.ts", "z/a.ts", "z/abz.ts", "z/aba.ts", "x/b.ts"];
-            const excludeSpecs = ["*.ts", "z/??z.ts", "*/b.ts"];
-            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, ["c:/dev/z/a.ts", "c:/dev/z/aba.ts"]);
-        });
-        it("with recursive excludes", () => {
-            const includeSpecs = ["a.ts", "b.ts", "x/a.ts", "x/b.ts", "x/y/a.ts", "x/y/b.ts"];
-            const excludeSpecs = ["**/b.ts"];
-            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/x/a.ts", "c:/dev/x/y/a.ts"]);
-        });
-        it("with case sensitive exclude", () => {
-            const includeSpecs = ["B.ts"];
-            const excludeSpecs = ["**/b.ts"];
-            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, basePath, {}, caseSensitiveHost);
-            assert.deepEqual(results, ["c:/dev/B.ts"]);
-        });
-    });
+    interface DirectoryEntry {
+        files: ts.Map<string>;
+        directories: ts.Map<string>;
+    }
 
-    describe("with wildcard include list", () => {
-        it("same named declarations are excluded", () => {
-            const includeSpecs = ["*.ts"];
-            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/b.ts", "c:/dev/c.d.ts"]);
-        });
-        it("`*` matches only ts files", () => {
-            const includeSpecs = ["*"];
-            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/b.ts", "c:/dev/c.d.ts"]);
-        });
-        it("`?` matches only a single character", () => {
-            const includeSpecs = ["x/?.ts"];
-            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, ["c:/dev/x/a.ts", "c:/dev/x/b.ts"]);
-        });
-        it("with recursive directory", () => {
-            const includeSpecs = ["**/a.ts"];
-            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, ["c:/dev/a.ts", "c:/dev/x/a.ts", "c:/dev/x/y/a.ts", "c:/dev/z/a.ts"]);
-        });
-        it("case sensitive", () => {
-            const includeSpecs = ["**/A.ts"];
-            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseSensitiveHost);
-            assert.deepEqual(results, ["c:/dev/A.ts"]);
-        });
-        it("with missing files are excluded", () => {
-            const includeSpecs = ["*/z.ts"];
-            const results = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, []);
-        });
-        it("always include literal files", () => {
-            const fileNames = ["a.ts"];
-            const includeSpecs = ["*/z.ts"];
-            const excludeSpecs = ["**/a.ts"];
-            const results = ts.expandFiles(fileNames, includeSpecs, excludeSpecs, basePath, {}, caseInsensitiveHost);
-            assert.deepEqual(results, ["c:/dev/a.ts"]);
-        });
-    });
+    interface TestParseConfigHost extends ts.ParseConfigHost {
+        basePath: string;
+    }
 
-    function createMockParseConfigHost(basePath: string, files: string[], ignoreCase: boolean): ts.ParseConfigHost {
+    function createMockParseConfigHost(ignoreCase: boolean, basePath: string, files: string[]): TestParseConfigHost {
         const fileSet: ts.Map<string> = {};
-        const directorySet: ts.Map<{ files: ts.Map<string>; directories: ts.Map<string>; }> = {};
+        const directorySet: ts.Map<DirectoryEntry> = {};
+        const emptyDirectory: DirectoryEntry = { files: {}, directories: {} };
 
         files.sort((a, b) => ts.comparePaths(a, b, basePath, ignoreCase));
         for (const file of files) {
@@ -167,18 +398,24 @@ describe("expandFiles", () => {
 
         return {
             useCaseSensitiveFileNames: !ignoreCase,
+            basePath,
             fileExists,
+            directoryExists,
             readDirectory,
             readFileNames,
             readDirectoryNames
         };
 
         function fileExists(path: string): boolean {
+            path = ts.getNormalizedAbsolutePath(path, basePath);
+            path = ts.removeTrailingDirectorySeparator(path);
             const fileKey = ignoreCase ? path.toLowerCase() : path;
             return ts.hasProperty(fileSet, fileKey);
         }
 
         function directoryExists(path: string): boolean {
+            path = ts.getNormalizedAbsolutePath(path, basePath);
+            path = ts.removeTrailingDirectorySeparator(path);
             const directoryKey = ignoreCase ? path.toLowerCase() : path;
             return ts.hasProperty(directorySet, directoryKey);
         }
@@ -188,7 +425,7 @@ describe("expandFiles", () => {
         }
 
         function readFileNames(path: string) {
-            const files = getDirectoryEntry(path).files;
+            const { files } = getDirectoryEntry(path) || emptyDirectory;
             const result: string[] = [];
             ts.forEachKey(files, key => { result.push(key); });
             result.sort((a, b) => ts.compareStrings(a, b, ignoreCase));
@@ -196,7 +433,7 @@ describe("expandFiles", () => {
         }
 
         function readDirectoryNames(path: string) {
-            const directories = getDirectoryEntry(path).directories;
+            const { directories } = getDirectoryEntry(path); // || emptyDirectory;
             const result: string[] = [];
             ts.forEachKey(directories, key => { result.push(key); });
             result.sort((a, b) => ts.compareStrings(a, b, ignoreCase));
@@ -245,5 +482,4 @@ describe("expandFiles", () => {
             }
         }
     }
-});
-
+}
\ No newline at end of file

From def3ba10854c2cb72bf7f60b71e6e459dfb79efb Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Mon, 7 Dec 2015 15:32:32 -0800
Subject: [PATCH 003/332] Added stubs to ChakraHost interface for
 readDirectoryNames/readFileNames

---
 src/compiler/sys.ts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 11a7646bd09..5ff8dbf6796 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -62,6 +62,8 @@ namespace ts {
         readFile(path: string): string;
         writeFile(path: string, contents: string): void;
         readDirectory(path: string, extension?: string, exclude?: string[]): string[];
+        readDirectoryNames(path: string): string[];
+        readFileNames(path: string): string[];
     };
 
     export var sys: System = (function () {
@@ -537,6 +539,8 @@ namespace ts {
                 getExecutingFilePath: () => ChakraHost.executingFile,
                 getCurrentDirectory: () => ChakraHost.currentDirectory,
                 readDirectory: ChakraHost.readDirectory,
+                readFileNames: ChakraHost.readFileNames,
+                readDirectoryNames: ChakraHost.readDirectoryNames,
                 exit: ChakraHost.quit,
             };
         }

From c3c3bca6fab303c94fe3ff369c9749081d30e40e Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Tue, 8 Dec 2015 10:54:23 -0800
Subject: [PATCH 004/332] Fixed typos in comments

---
 src/compiler/commandLineParser.ts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 6499ec6327f..4d2480ffef9 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -646,12 +646,12 @@ namespace ts {
         const keyMapper = host.useCaseSensitiveFileNames ? caseSensitiveKeyMapper : caseInsensitiveKeyMapper;
 
         // Literal file names (provided via the "files" array in tsconfig.json) are stored in a
-        // file map with a possibly invariant key. We use this map later when when including
+        // file map with a possibly case insensitive key. We use this map later when when including
         // wildcard paths.
         const literalFiles = createFileMap<Path>(keyMapper);
 
-        // Wildcard paths (provided via the "includes" array in tscofnig.json) are stored in a
-        // file map with a possibly invariant key. We use this map to store paths matched
+        // Wildcard paths (provided via the "includes" array in tsconfig.json) are stored in a
+        // file map with a possibly case insensitive key. We use this map to store paths matched
         // via wildcard, and to handle extension priority.
         const wildcardFiles = createFileMap<Path>(keyMapper);
 
@@ -672,7 +672,7 @@ namespace ts {
         //   - A "directories" array, which contains the subdirectory names in the directory.
         const cache = createFileMap<boolean | DirectoryResult>(keyMapper);
 
-        // Rather than requery this for each file and filespec, we querythe supported extensions
+        // Rather than requery this for each file and filespec, we query the supported extensions
         // once and store it on the expansion context.
         const supportedExtensions = getSupportedExtensions(options);
 

From bf9af46e5a1d35a5d83f95e0260dff1689967440 Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Tue, 8 Dec 2015 10:57:04 -0800
Subject: [PATCH 005/332] Changed name of 'reduce' method added to FileSet

---
 src/compiler/commandLineParser.ts | 4 ++--
 src/compiler/core.ts              | 4 ++--
 src/compiler/types.ts             | 2 +-
 3 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 4d2480ffef9..b4339e78f2a 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -711,8 +711,8 @@ namespace ts {
         }
 
         return {
-            fileNames: wildcardFiles.reduce(addFileToOutput, literalFiles.reduce(addFileToOutput, [])),
-            wildcardDirectories: wildcardDirectories.reduce<Map<WatchDirectoryFlags>>(addDirectoryToOutput, {}),
+            fileNames: wildcardFiles.reduceProperties(addFileToOutput, literalFiles.reduceProperties(addFileToOutput, [])),
+            wildcardDirectories: wildcardDirectories.reduceProperties<Map<WatchDirectoryFlags>>(addDirectoryToOutput, {}),
         };
     }
 
diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index 998766e8d9d..3e6981996e1 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -25,7 +25,7 @@ namespace ts {
             contains,
             remove,
             forEachValue: forEachValueInMap,
-            reduce,
+            reduceProperties: reducePropertiesInMap,
             clear,
             mergeFrom
         };
@@ -36,7 +36,7 @@ namespace ts {
             }
         }
 
-        function reduce<U>(callback: (memo: U, value: T, key: Path) => U, initial: U) {
+        function reducePropertiesInMap<U>(callback: (memo: U, value: T, key: Path) => U, initial: U) {
             return reduceProperties(files, callback, initial);
         }
 
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 4b84c27be99..4c62904f4e8 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -14,7 +14,7 @@ namespace ts {
         remove(fileName: Path): void;
 
         forEachValue(f: (key: Path, v: T) => void): void;
-        reduce<U>(f: (memo: U, value: T, key: Path) => U, initial: U): U;
+        reduceProperties<U>(f: (memo: U, value: T, key: Path) => U, initial: U): U;
         mergeFrom(other: FileMap<T>): void;
         clear(): void;
     }

From d8572508ee0650e58a7602098498b1309c301d2d Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Mon, 14 Dec 2015 15:21:12 -0800
Subject: [PATCH 006/332] Heavily revised implementation that relies on an
 updated 'readDirectory' API.

---
 Jakefile.js                                   |   1 +
 src/compiler/commandLineParser.ts             | 753 +++---------------
 src/compiler/core.ts                          | 203 ++++-
 src/compiler/sys.ts                           | 121 +--
 src/compiler/types.ts                         |  22 +-
 src/harness/harness.ts                        |  39 +-
 src/harness/harnessLanguageService.ts         |  10 +-
 src/harness/loggedIO.ts                       |   9 +-
 src/harness/projectsRunner.ts                 |  15 +-
 src/harness/rwcRunner.ts                      |   3 -
 src/harness/vfs.ts                            | 160 ++++
 src/services/shims.ts                         |  76 +-
 .../cases/unittests/cachingInServerLSHost.ts  |   4 +-
 tests/cases/unittests/expandFiles.ts          | 259 +++---
 tests/cases/unittests/session.ts              |   2 -
 15 files changed, 641 insertions(+), 1036 deletions(-)
 create mode 100644 src/harness/vfs.ts

diff --git a/Jakefile.js b/Jakefile.js
index 58677e19a75..0ce1d5a95ec 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -131,6 +131,7 @@ var languageServiceLibrarySources = [
 
 var harnessCoreSources = [
     "harness.ts",
+    "vfs.ts",
     "sourceMapRecorder.ts",
     "harnessLanguageService.ts",
     "fourslash.ts",
diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index b4339e78f2a..c81b3b63244 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -582,47 +582,8 @@ namespace ts {
         return { options, errors };
     }
 
-    // Simplified whitelist, forces escaping of any non-word (or digit), non-whitespace character.
-    const reservedCharacterPattern = /[^\w\s]/g;
-
-    const enum ExpansionState {
-        Ok,
-        Error
-    }
-
-    interface ExpansionContext {
-        /** A pattern used to exclude a file specification.  */
-        excludePattern: RegExp;
-        /** Compiler options. */
-        options: CompilerOptions;
-        /** The host used to resolve files and directories. */
-        host: ParseConfigHost;
-        /** Errors to report. */
-        errors: Diagnostic[];
-        /** The set of literal files. */
-        literalFiles: FileMap<Path>;
-        /** The set of files matching a wildcard. */
-        wildcardFiles: FileMap<Path>;
-        /** Directories to be watched. */
-        wildcardDirectories: FileMap<WatchDirectoryFlags>;
-        /** Supported extensions. */
-        supportedExtensions: string[];
-        /**
-         * Path cache, used to reduce calls to the file system. `true` indicates a file exists,
-         * `false` indicates a file or directory does not exist. A DirectoryResult
-         * indicates the file and subdirectory names in a directory. */
-        cache: FileMap<boolean | DirectoryResult>;
-    }
-
-    const enum FileSystemEntryKind {
-        File,
-        Directory
-    }
-
-    interface DirectoryResult {
-        files?: string[];
-        directories?: string[];
-    }
+    const invalidTrailingRecursionPattern = /(^|\/)\*\*\/?$/;
+    const invalidMultipleRecursionPatterns = /(^|\/)\*\*\/(.*\/)?\*\*($|\/)/;
 
     /**
      * Expands an array of file specifications.
@@ -642,348 +603,143 @@ namespace ts {
         // The exclude spec list is converted into a regular expression, which allows us to quickly
         // test whether a file or directory should be excluded before recursively traversing the
         // file system.
-        const excludePattern = includeSpecs ? createExcludeRegularExpression(excludeSpecs, basePath, options, host, errors) : undefined;
         const keyMapper = host.useCaseSensitiveFileNames ? caseSensitiveKeyMapper : caseInsensitiveKeyMapper;
 
         // Literal file names (provided via the "files" array in tsconfig.json) are stored in a
         // file map with a possibly case insensitive key. We use this map later when when including
         // wildcard paths.
-        const literalFiles = createFileMap<Path>(keyMapper);
+        const literalFileMap: Map<string> = {};
 
         // Wildcard paths (provided via the "includes" array in tsconfig.json) are stored in a
         // file map with a possibly case insensitive key. We use this map to store paths matched
         // via wildcard, and to handle extension priority.
-        const wildcardFiles = createFileMap<Path>(keyMapper);
+        const wildcardFileMap: Map<string> = {};
 
         // Wildcard directories (provided as part of a wildcard path) are stored in a
         // file map that marks whether it was a regular wildcard match (with a `*` or `?` token),
         // or a recursive directory. This information is used by filesystem watchers to monitor for
         // new entries in these paths.
-        const wildcardDirectories = createFileMap<WatchDirectoryFlags>(keyMapper);
-
-        // To reduce the overhead of disk I/O (and marshalling to managed code when hosted in
-        // Visual Studio), file system queries are cached during the expansion session.
-        // If present, a cache entry can be one of three values:
-        // - A `false` value indicates the file or directory did not exist.
-        // - A `true` value indicates the path is a file and it exists.
-        // - An object value indicates the path is a directory and exists. The object may have
-        //   zero, one, or both of the following properties:
-        //   - A "files" array, which contains the file names in the directory.
-        //   - A "directories" array, which contains the subdirectory names in the directory.
-        const cache = createFileMap<boolean | DirectoryResult>(keyMapper);
+        const wildcardDirectories: Map<WatchDirectoryFlags> = getWildcardDirectories(includeSpecs, basePath, host.useCaseSensitiveFileNames);
 
         // Rather than requery this for each file and filespec, we query the supported extensions
         // once and store it on the expansion context.
         const supportedExtensions = getSupportedExtensions(options);
 
-        // The expansion context holds references to shared information for the various expansion
-        // operations to reduce the overhead of closures.
-        const context: ExpansionContext = {
-            options,
-            host,
-            errors,
-            excludePattern,
-            literalFiles,
-            wildcardFiles,
-            wildcardDirectories,
-            supportedExtensions,
-            cache
-        };
-
         // Literal files are always included verbatim. An "include" or "exclude" specification cannot
         // remove a literal file.
         if (fileNames) {
             for (const fileName of fileNames) {
-                const path = toPath(fileName, basePath, caseSensitiveKeyMapper);
-                if (!literalFiles.contains(path)) {
-                    literalFiles.set(path, path);
+                const file = combinePaths(basePath, fileName);
+                literalFileMap[keyMapper(file)] = file;
+            }
+        }
+
+        if (includeSpecs) {
+            includeSpecs = validateSpecs(includeSpecs, errors, /*allowTrailingRecursion*/ false);
+            if (excludeSpecs) {
+                excludeSpecs = validateSpecs(excludeSpecs, errors, /*allowTrailingRecursion*/ true);
+            }
+
+            for (const file of host.readDirectory(basePath, supportedExtensions, excludeSpecs, includeSpecs)) {
+                // If we have already included a literal or wildcard path with a
+                // higher priority extension, we should skip this file.
+                //
+                // This handles cases where we may encounter both <file>.ts and
+                // <file>.d.ts (or <file>.js if "allowJs" is enabled) in the same
+                // directory when they are compilation outputs.
+                if (hasFileWithHigherPriorityExtension(file, literalFileMap, wildcardFileMap, supportedExtensions, keyMapper)) {
+                    continue;
+                }
+
+                // We may have included a wildcard path with a lower priority
+                // extension due to the user-defined order of entries in the
+                // "include" array. If there is a lower priority extension in the
+                // same directory, we should remove it.
+                removeWildcardFilesWithLowerPriorityExtension(file, wildcardFileMap, supportedExtensions, keyMapper);
+
+                const key = keyMapper(file);
+                if (!hasProperty(literalFileMap, key) && !hasProperty(wildcardFileMap, key)) {
+                    wildcardFileMap[key] = file;
                 }
             }
         }
 
-        // Each "include" specification is expanded and matching files are added.
-        if (includeSpecs) {
-            for (let includeSpec of includeSpecs) {
-                includeSpec = normalizePath(includeSpec);
-                includeSpec = removeTrailingDirectorySeparator(includeSpec);
-                expandFileSpec(includeSpec, <Path>basePath, 0, context);
-            }
-        }
-
+        const literalFiles = reduceProperties(literalFileMap, addFileToOutput, []);
+        const wildcardFiles = reduceProperties(wildcardFileMap, addFileToOutput, []);
+        wildcardFiles.sort(host.useCaseSensitiveFileNames ? compareStrings : compareStringsCaseInsensitive);
         return {
-            fileNames: wildcardFiles.reduceProperties(addFileToOutput, literalFiles.reduceProperties(addFileToOutput, [])),
-            wildcardDirectories: wildcardDirectories.reduceProperties<Map<WatchDirectoryFlags>>(addDirectoryToOutput, {}),
+            fileNames: literalFiles.concat(wildcardFiles),
+            wildcardDirectories
         };
     }
 
+    function validateSpecs(specs: string[], errors: Diagnostic[], allowTrailingRecursion: boolean) {
+        const validSpecs: string[] = [];
+        for (const spec of specs) {
+            if (!allowTrailingRecursion && invalidTrailingRecursionPattern.test(spec)) {
+                errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, spec));
+            }
+            else if (invalidMultipleRecursionPatterns.test(spec)) {
+                errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
+            }
+            else {
+                validSpecs.push(spec);
+            }
+        }
+
+        return validSpecs;
+    }
+
+    const watchRecursivePattern = /\/[^/]*?[*?][^/]*\//;
+    const wildcardDirectoryPattern = /^[^*?]*(?=\/[^/]*[*?])/;
+
     /**
-     * Expands a file specification with wildcards.
-     *
-     * @param fileSpec The original file specification.
-     * @param basePath The directory to expand. This path must exist.
-     * @param start The starting offset in the file specification.
-     * @param context The expansion context.
-     * @param isExpandingRecursiveDirectory A value indicating whether the file specification includes a recursive directory wildcard prior to the start of this segment.
+     * Gets directories in a set of include patterns that should be watched for changes.
      */
-    function expandFileSpec(fileSpec: string, basePath: Path, start: number, context: ExpansionContext, isExpandingRecursiveDirectory?: boolean): ExpansionState {
-        // A file specification must always point to a file. As a result, we always assume the
-        // path segment following the last directory separator points to a file. The only
-        // exception is when the final path segment is the recursive directory pattern "**", in
-        // which case we report an error.
-        const { host, options, errors, wildcardFiles, wildcardDirectories, excludePattern, cache, supportedExtensions } = context;
-
-        // Skip expansion if the base path matches an exclude pattern.
-        if (isExcludedPath(basePath, excludePattern)) {
-            return ExpansionState.Ok;
-        }
-
-        // Find the offset of the next wildcard in the file specification. If there are no more
-        // wildcards, we can include the file if it exists and isn't excluded.
-        let offset = indexOfWildcard(fileSpec, start);
-        if (offset < 0) {
-            const path = toPath(fileSpec.substring(start), basePath, caseSensitiveKeyMapper);
-            if (!isExcludedPath(path, excludePattern) && pathExists(path, FileSystemEntryKind.File, context)) {
-                includeFile(path, context, /*wildcardHasExtension*/ true);
-            }
-
-            return ExpansionState.Ok;
-        }
-
-        // Find the last directory separator before the wildcard to get the leading path.
-        offset = fileSpec.lastIndexOf(directorySeparator, offset);
-        if (offset > start) {
-            // The wildcard occurs in a later segment, include remaining path up to
-            // wildcard in prefix.
-            basePath = toPath(fileSpec.substring(start, offset), basePath, caseSensitiveKeyMapper);
-
-            // Skip this wildcard path if the base path now matches an exclude pattern.
-            if (isExcludedPath(basePath, excludePattern) || !pathExists(basePath, FileSystemEntryKind.Directory, context)) {
-                return ExpansionState.Ok;
-            }
-
-            start = offset + 1;
-        }
-
-        // Find the offset of the next directory separator to extract the wildcard path segment.
-        offset = getEndOfPathSegment(fileSpec, start);
-
-        // Check if the current offset is the beginning of a recursive directory pattern.
-        if (isRecursiveDirectoryWildcard(fileSpec, start, offset)) {
-            // Stop expansion if a file specification contains more than one recursive directory pattern.
-            if (isExpandingRecursiveDirectory) {
-                if (errors) {
-                    errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, fileSpec));
+    function getWildcardDirectories(includes: string[], path: string, useCaseSensitiveFileNames: boolean) {
+        // We watch a directory recursively if it contains a wildcard anywhere in a directory segment
+        // of the pattern:
+        //
+        //  /a/b/**/d   - Watch /a/b recursively to catch changes to any d in any subfolder recursively
+        //  /a/b/*/d    - Watch /a/b recursively to catch any d in any immediate subfolder, even if a new subfolder is added
+        //
+        // We watch a directory without recursion if it contains a wildcard in the file segment of
+        // the pattern:
+        //
+        //  /a/b/*      - Watch /a/b directly to catch any new file
+        //  /a/b/a?z    - Watch /a/b directly to catch any new file matching a?z
+        const wildcardDirectories: Map<WatchDirectoryFlags> = {};
+        if (includes !== undefined) {
+            const recursiveKeys: string[] = [];
+            for (const include of includes) {
+                const name = combinePaths(path, include);
+                const match = wildcardDirectoryPattern.exec(name);
+                if (match) {
+                    const key = useCaseSensitiveFileNames ? match[0] : match[0].toLowerCase();
+                    const flags = watchRecursivePattern.test(name) ? WatchDirectoryFlags.Recursive : WatchDirectoryFlags.None;
+                    const existingFlags = getProperty(wildcardDirectories, key);
+                    if (existingFlags === undefined || existingFlags < flags) {
+                        wildcardDirectories[key] = flags;
+                        if (flags === WatchDirectoryFlags.Recursive) {
+                            recursiveKeys.push(key);
+                        }
+                    }
                 }
-
-                return ExpansionState.Error;
             }
 
-            if (offset >= fileSpec.length) {
-                // If there is no file specification following the recursive directory pattern
-                // then we report an error as we cannot match any files.
-                if (errors) {
-                    errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, fileSpec));
-                }
-
-                return ExpansionState.Error;
-            }
-
-            // Keep track of the recursive wildcard directory
-            wildcardDirectories.set(basePath, WatchDirectoryFlags.Recursive);
-
-            // Expand the recursive directory pattern.
-            return expandRecursiveDirectory(fileSpec, basePath, offset + 1, context);
-        }
-
-        if (!isExpandingRecursiveDirectory) {
-            wildcardDirectories.set(basePath, WatchDirectoryFlags.None);
-        }
-
-        // Match the entries in the directory against the wildcard pattern.
-        const pattern = createRegularExpressionFromWildcard(fileSpec, start, offset, host);
-
-        // If there are no more directory separators (the offset is at the end of the file specification), then
-        // this must be a file.
-        if (offset >= fileSpec.length) {
-            const wildcardHasExtension = fileSegmentHasExtension(fileSpec, start);
-            const fileNames = readDirectory(basePath, FileSystemEntryKind.File, context);
-            for (const fileName of fileNames) {
-                // Skip the file if it doesn't match the pattern.
-                if (!pattern.test(fileName)) {
-                    continue;
-                }
-
-                const path = toPath(fileName, basePath, caseSensitiveKeyMapper);
-
-                // If we have excluded this path, we should skip the file.
-                if (isExcludedPath(path, excludePattern)) {
-                    continue;
-                }
-
-                // This wildcard has no further directory to process, so include the file.
-                includeFile(path, context, wildcardHasExtension);
-            }
-        }
-        else {
-            const directoryNames = readDirectory(basePath, FileSystemEntryKind.Directory, context);
-            for (const directoryName of directoryNames) {
-                if (pattern.test(directoryName)) {
-                    const newBasePath = toPath(directoryName, basePath, caseSensitiveKeyMapper);
-
-                    // Expand the entries in this directory.
-                    if (expandFileSpec(fileSpec, newBasePath, offset + 1, context, isExpandingRecursiveDirectory) === ExpansionState.Error) {
-                        return ExpansionState.Error;
+            // Remove any subpaths under an existing recursively watched directory.
+            for (const key in wildcardDirectories) {
+                if (hasProperty(wildcardDirectories, key)) {
+                    for (const recursiveKey in recursiveKeys) {
+                        if (containsPath(recursiveKey, key, path, !useCaseSensitiveFileNames)) {
+                            delete wildcardDirectories[key];
+                        }
                     }
                 }
             }
         }
 
-        return ExpansionState.Ok;
-    }
-
-    /**
-     * Expands a `**` recursive directory wildcard.
-     *
-     * @param fileSpec The original file specification.
-     * @param basePath The directory to recursively expand.
-     * @param start The starting offset in the file specification.
-     * @param context The expansion context.
-     */
-    function expandRecursiveDirectory(fileSpec: string, basePath: Path, start: number, context: ExpansionContext): ExpansionState {
-        // Skip the directory if it is excluded.
-        if (isExcludedPath(basePath, context.excludePattern)) {
-            return ExpansionState.Ok;
-        }
-
-        // Expand the non-recursive part of the file specification against the prefix path.
-        if (expandFileSpec(fileSpec, basePath, start, context, /*isExpandingRecursiveDirectory*/ true) === ExpansionState.Error) {
-            return ExpansionState.Error;
-        }
-
-        // Recursively expand each subdirectory.
-        const directoryNames = readDirectory(basePath, FileSystemEntryKind.Directory, context);
-        for (const directoryName of directoryNames) {
-            const newBasePath = toPath(directoryName, basePath, caseSensitiveKeyMapper);
-            if (expandRecursiveDirectory(fileSpec, newBasePath, start, context) === ExpansionState.Error) {
-                return ExpansionState.Error;
-            }
-        }
-
-        return ExpansionState.Ok;
-    }
-
-    /**
-     * Attempts to include a file in a file set.
-     *
-     * @param file The file to include.
-     * @param context The expansion context.
-     * @param wildcardHasExtension A value indicating whether the wildcard supplied an explicit extension.
-     */
-    function includeFile(file: Path, context: ExpansionContext, wildcardHasExtension: boolean): void {
-        const { options, literalFiles, wildcardFiles, excludePattern, supportedExtensions } = context;
-
-        // Ignore the file if it does not have a supported extension.
-        if ((!wildcardHasExtension || !options.allowNonTsExtensions) && !isSupportedSourceFileName(file, options)) {
-            return;
-        }
-
-        // If we have already included a literal or wildcard path with a
-        // higher priority extension, we should skip this file.
-        //
-        // This handles cases where we may encounter both <file>.ts and
-        // <file>.d.ts (or <file>.js if "allowJs" is enabled) in the same
-        // directory when they are compilation outputs.
-        const extensionPriority = getExtensionPriority(file, supportedExtensions);
-        if (hasFileWithHigherPriorityExtension(file, extensionPriority, context)) {
-            return;
-        }
-
-        // We may have included a wildcard path with a lower priority
-        // extension due to the user-defined order of entries in the
-        // "include" array. If there is a lower priority extension in the
-        // same directory, we should remove it.
-        removeWildcardFilesWithLowerPriorityExtension(file, extensionPriority, context);
-
-        if (!literalFiles.contains(file) && !wildcardFiles.contains(file)) {
-            wildcardFiles.set(file, file);
-        }
-    }
-
-    /**
-     * Tests whether a path exists and is a specific kind of item. Results are
-     * cached for performance.
-     *
-     * @param path The path to tests.
-     * @param kind The kind of file system entry to find.
-     * @param context The expansion context.
-     */
-    function pathExists(path: Path, kind: FileSystemEntryKind, context: ExpansionContext) {
-        const { cache, host } = context;
-        const entry = cache.get(path);
-        if (entry === false) {
-            // If the entry is strictly `false` then the path doesn`t exist, regardless of its kind.
-            return false;
-        }
-        else if (entry === true) {
-            // If the entry is strictly `true` then a file exists at this path.
-            return kind === FileSystemEntryKind.File;
-        }
-        else if (typeof entry === "object") {
-            // If the entry is an object, then a directory exists at this path.
-            return kind === FileSystemEntryKind.Directory;
-        }
-        else {
-            // The entry does not exist in the cache, so we need to check the host.
-            if (kind === FileSystemEntryKind.File) {
-                const result = host.fileExists(path);
-                cache.set(path, result);
-                return result;
-            }
-            else if (kind === FileSystemEntryKind.Directory) {
-                const result = host.directoryExists(path);
-                cache.set(path, result ? {} : false);
-                return result;
-            }
-        }
-
-        return false;
-    }
-
-    /**
-     * Reads the contents of a directory for a specific kind of item. Results are
-     * cached for performance.
-     *
-     * @param basePath The path to the directory. The path must already exist.
-     * @param kind The kind of file system entry to find.
-     * @param context The expansion context.
-     */
-    function readDirectory(basePath: Path, kind: FileSystemEntryKind, context: ExpansionContext) {
-        const { cache, host } = context;
-
-        let entry = cache.get(basePath);
-        if (entry === undefined) {
-            entry = {};
-            cache.set(basePath, entry);
-        }
-
-        if (typeof entry === "object") {
-            if (kind === FileSystemEntryKind.File) {
-                if (entry.files === undefined) {
-                    entry.files = host.readFileNames(basePath);
-                }
-
-                return entry.files;
-            }
-            else if (kind === FileSystemEntryKind.Directory) {
-                if (entry.directories === undefined) {
-                    entry.directories = host.readDirectoryNames(basePath);
-                }
-
-                return entry.directories;
-            }
-        }
-
-        return [];
+        return wildcardDirectories;
     }
 
     /**
@@ -994,13 +750,13 @@ namespace ts {
      * @param extensionPriority The priority of the extension.
      * @param context The expansion context.
      */
-    function hasFileWithHigherPriorityExtension(file: Path, extensionPriority: ExtensionPriority, context: ExpansionContext) {
-        const { literalFiles, wildcardFiles, supportedExtensions } = context;
+    function hasFileWithHigherPriorityExtension(file: string, literalFiles: Map<string>, wildcardFiles: Map<string>, extensions: string[], keyMapper: (value: string) => string) {
+        const extensionPriority = getExtensionPriority(file, extensions);
         const adjustedExtensionPriority = adjustExtensionPriority(extensionPriority);
         for (let i = ExtensionPriority.Highest; i < adjustedExtensionPriority; ++i) {
-            const higherPriorityExtension = supportedExtensions[i];
-            const higherPriorityPath = changeExtension(file, higherPriorityExtension);
-            if (literalFiles.contains(higherPriorityPath) || wildcardFiles.contains(higherPriorityPath)) {
+            const higherPriorityExtension = extensions[i];
+            const higherPriorityPath = keyMapper(changeExtension(file, higherPriorityExtension));
+            if (hasProperty(literalFiles, higherPriorityPath) || hasProperty(wildcardFiles, higherPriorityPath)) {
                 return true;
             }
         }
@@ -1016,13 +772,13 @@ namespace ts {
      * @param extensionPriority The priority of the extension.
      * @param context The expansion context.
      */
-    function removeWildcardFilesWithLowerPriorityExtension(file: Path, extensionPriority: ExtensionPriority, context: ExpansionContext) {
-        const { wildcardFiles, supportedExtensions } = context;
+    function removeWildcardFilesWithLowerPriorityExtension(file: string, wildcardFiles: Map<string>, extensions: string[], keyMapper: (value: string) => string) {
+        const extensionPriority = getExtensionPriority(file, extensions);
         const nextExtensionPriority = getNextLowestExtensionPriority(extensionPriority);
-        for (let i = nextExtensionPriority; i < supportedExtensions.length; ++i) {
-            const lowerPriorityExtension = supportedExtensions[i];
-            const lowerPriorityPath = changeExtension(file, lowerPriorityExtension);
-            wildcardFiles.remove(lowerPriorityPath);
+        for (let i = nextExtensionPriority; i < extensions.length; ++i) {
+            const lowerPriorityExtension = extensions[i];
+            const lowerPriorityPath = keyMapper(changeExtension(file, lowerPriorityExtension));
+            delete wildcardFiles[lowerPriorityPath];
         }
     }
 
@@ -1037,297 +793,6 @@ namespace ts {
         return output;
     }
 
-    /**
-     * Adds a watched directory to an output map.
-     *
-     * @param output The output map.
-     * @param flags The directory flags.
-     * @param directory The directory path.
-     */
-    function addDirectoryToOutput(output: Map<WatchDirectoryFlags>, flags: WatchDirectoryFlags, directory: string) {
-        output[directory] = flags;
-        return output;
-    }
-
-    /**
-     * Determines whether a path should be excluded.
-     *
-     * @param path The path to test for exclusion.
-     * @param excludePattern A pattern used to exclude a file specification.
-     */
-    function isExcludedPath(path: string, excludePattern: RegExp) {
-        return excludePattern ? excludePattern.test(path) : false;
-    }
-
-    /**
-     * Determines whether a file segment contains a valid extension.
-     *
-     * @param fileSpec The file specification.
-     * @param segmentStart The offset to the start of the file segment in the specification.
-     */
-    function fileSegmentHasExtension(fileSpec: string, segmentStart: number) {
-        // if the final path segment does not have a . token, the file does not have an extension.
-        if (fileSpec.indexOf(".", segmentStart) === -1) {
-            return false;
-        }
-
-        // if the extension for the final path segment is (".*"), then the file does not have an extension.
-        if (fileExtensionIs(fileSpec, ".*")) {
-            return false;
-        }
-
-        return true;
-    }
-
-    /**
-     * Creates a regular expression from a glob-style wildcard.
-     *
-     * @param fileSpec The file specification.
-     * @param start The starting offset in the file specification.
-     * @param end The end offset in the file specification.
-     * @param host The host used to resolve files and directories.
-     */
-    function createRegularExpressionFromWildcard(fileSpec: string, start: number, end: number, host: ParseConfigHost): RegExp {
-        const pattern = createPatternFromWildcard(fileSpec, start, end);
-        return new RegExp("^" + pattern + "$", host.useCaseSensitiveFileNames ? "" : "i");
-    }
-
-    /**
-     * Creates a pattern from a wildcard segment.
-     *
-     * @param fileSpec The file specification.
-     * @param start The starting offset in the file specification.
-     * @param end The end offset in the file specification.
-     */
-    function createPatternFromWildcard(fileSpec: string, start: number, end: number): string {
-        let pattern = "";
-        let offset = indexOfWildcard(fileSpec, start);
-        while (offset >= 0 && offset < end) {
-            if (offset > start) {
-                // Escape and append the non-wildcard portion to the regular expression.
-                pattern += escapeRegularExpressionText(fileSpec, start, offset);
-            }
-
-            const charCode = fileSpec.charCodeAt(offset);
-            if (charCode === CharacterCodes.asterisk) {
-                // Append a multi-character (zero or more characters) pattern to the regular expression.
-                pattern += "[^/]*?";
-            }
-            else if (charCode === CharacterCodes.question) {
-                // Append a single-character pattern to the regular expression.
-                pattern += "[^/]";
-            }
-
-            start = offset + 1;
-            offset = indexOfWildcard(fileSpec, start);
-        }
-
-        // Escape and append any remaining non-wildcard portion.
-        if (start < end) {
-            pattern += escapeRegularExpressionText(fileSpec, start, end);
-        }
-
-        return pattern;
-    }
-
-    /**
-     * Creates a regular expression from a glob-style wildcard used to exclude a file.
-     *
-     * @param excludeSpecs The file specifications to exclude.
-     * @param basePath The prefix path.
-     * @param options Compiler options.
-     * @param host The host used to resolve files and directories.
-     * @param errors An array for diagnostic reporting.
-     */
-    function createExcludeRegularExpression(excludeSpecs: string[], basePath: string, options: CompilerOptions, host: ParseConfigHost, errors: Diagnostic[]): RegExp {
-        // Ignore an empty exclusion list
-        if (!excludeSpecs || excludeSpecs.length === 0) {
-            return undefined;
-        }
-
-        basePath = escapeRegularExpressionText(basePath, 0, basePath.length);
-
-        let pattern = "";
-        for (const excludeSpec of excludeSpecs) {
-            const excludePattern = createExcludePattern(excludeSpec, basePath, options, host, errors);
-            if (excludePattern) {
-                if (pattern.length > 0) {
-                    pattern += "|";
-                }
-
-                pattern += "(" + excludePattern + ")";
-            }
-        }
-
-        if (pattern.length > 0) {
-            return new RegExp("^(" + pattern + ")($|/)", host.useCaseSensitiveFileNames ? "" : "i");
-        }
-
-        return undefined;
-    }
-
-    /**
-     * Creates a pattern for used to exclude a file.
-     *
-     * @param excludeSpec The file specification to exclude.
-     * @param basePath The base path for the exclude pattern.
-     * @param options Compiler options.
-     * @param host The host used to resolve files and directories.
-     * @param errors An array for diagnostic reporting.
-     */
-    function createExcludePattern(excludeSpec: string, basePath: string, options: CompilerOptions, host: ParseConfigHost, errors: Diagnostic[]): string {
-        if (!excludeSpec) {
-            return undefined;
-        }
-
-        excludeSpec = normalizePath(excludeSpec);
-        excludeSpec = removeTrailingDirectorySeparator(excludeSpec);
-
-        let pattern = isRootedDiskPath(excludeSpec) ? "" : basePath;
-        let hasRecursiveDirectoryWildcard = false;
-        let segmentStart = 0;
-        let segmentEnd = getEndOfPathSegment(excludeSpec, segmentStart);
-        while (segmentStart < segmentEnd) {
-            if (isRecursiveDirectoryWildcard(excludeSpec, segmentStart, segmentEnd)) {
-                if (hasRecursiveDirectoryWildcard) {
-                    if (errors) {
-                        errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, excludeSpec));
-                    }
-
-                    return undefined;
-                }
-
-                // As an optimization, if the recursive directory is the last
-                // wildcard, or is followed by only `*` or `*.ts`, don't add the
-                // remaining pattern and exit the loop.
-                if (canElideRecursiveDirectorySegment(excludeSpec, segmentEnd, options, host)) {
-                    break;
-                }
-
-                hasRecursiveDirectoryWildcard = true;
-                pattern += "(/.+)?";
-            }
-            else {
-                if (pattern) {
-                    pattern += directorySeparator;
-                }
-
-                pattern += createPatternFromWildcard(excludeSpec, segmentStart, segmentEnd);
-            }
-
-            segmentStart = segmentEnd + 1;
-            segmentEnd = getEndOfPathSegment(excludeSpec, segmentStart);
-        }
-
-        return pattern;
-    }
-
-    /**
-     * Determines whether a recursive directory segment can be elided when
-     * building a regular expression to exclude a path.
-     *
-     * @param excludeSpec The file specification used to exclude a path.
-     * @param segmentEnd The end position of the recursive directory segment.
-     * @param options Compiler options.
-     * @param host The host used to resolve files and directories.
-     */
-    function canElideRecursiveDirectorySegment(excludeSpec: string, segmentEnd: number, options: CompilerOptions, host: ParseConfigHost) {
-        // If there are no segments after this segment, the pattern for this segment may be elided.
-        if (segmentEnd + 1 >= excludeSpec.length) {
-            return true;
-        }
-
-        // If the following segment is a wildcard that may be elided, the pattern for this segment may be elided.
-        return canElideWildcardSegment(excludeSpec, segmentEnd + 1, options, host);
-    }
-
-    /**
-     * Determines whether a wildcard segment can be elided when building a
-     * regular expression to exclude a path.
-     *
-     * @param excludeSpec The file specification used to exclude a path.
-     * @param segmentStart The starting position of the segment.
-     * @param options Compiler options.
-     * @param host The host used to resolve files and directories.
-     */
-    function canElideWildcardSegment(excludeSpec: string, segmentStart: number, options: CompilerOptions, host: ParseConfigHost) {
-        const charCode = excludeSpec.charCodeAt(segmentStart);
-        if (charCode === CharacterCodes.asterisk) {
-            const end = excludeSpec.length;
-
-            // If the segment consists only of `*`, we may elide this segment.
-            if (segmentStart + 1 === end) {
-                return true;
-            }
-
-            // If the segment consists only of `*.ts`, and we do not allow
-            // any other extensions for source files, we may elide this segment.
-            if (!options.allowNonTsExtensions && !options.jsx && !options.allowJs && segmentStart + 4 === end) {
-                const segment = excludeSpec.substr(segmentStart);
-                return fileExtensionIs(host.useCaseSensitiveFileNames ? segment : segment.toLowerCase(), ".ts");
-            }
-        }
-        return false;
-    }
-
-    /**
-     * Escape regular expression reserved tokens.
-     *
-     * @param text The text to escape.
-     * @param start The starting offset in the string.
-     * @param end The ending offset in the string.
-     */
-    function escapeRegularExpressionText(text: string, start: number, end: number) {
-        return text.substring(start, end).replace(reservedCharacterPattern, "\\$&");
-    }
-
-    /**
-     * Determines whether the wildcard at the current offset is a recursive directory wildcard.
-     *
-     * @param fileSpec The file specification.
-     * @param segmentStart The starting offset of a segment in the file specification.
-     * @param segmentEnd The ending offset of a segment in the file specification.
-     */
-    function isRecursiveDirectoryWildcard(fileSpec: string, segmentStart: number, segmentEnd: number) {
-        return segmentEnd - segmentStart === 2 &&
-            fileSpec.charCodeAt(segmentStart) === CharacterCodes.asterisk &&
-            fileSpec.charCodeAt(segmentStart + 1) === CharacterCodes.asterisk;
-    }
-
-    /**
-     * Gets the index of the next wildcard character in a file specification.
-     *
-     * @param fileSpec The file specification.
-     * @param start The starting offset in the file specification.
-     */
-    function indexOfWildcard(fileSpec: string, start: number, end: number = fileSpec.length): number {
-        for (let i = start; i < end; ++i) {
-            const ch = fileSpec.charCodeAt(i);
-            if (ch === CharacterCodes.asterisk || ch === CharacterCodes.question) {
-                return i;
-            }
-        }
-
-        return -1;
-    }
-
-    /**
-     * Get the end position of a path segment, either the index of the next directory separator or
-     * the provided end position.
-     *
-     * @param fileSpec The file specification.
-     * @param segmentStart The start offset in the file specification.
-     */
-    function getEndOfPathSegment(fileSpec: string, segmentStart: number): number {
-        const end = fileSpec.length;
-        if (segmentStart >= end) {
-            return end;
-        }
-
-        const offset = fileSpec.indexOf(directorySeparator, segmentStart);
-        return offset < 0 ? end : offset;
-    }
-
     /**
      * Gets a case sensitive key.
      *
diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index 3e6981996e1..465d4d229d8 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -25,9 +25,7 @@ namespace ts {
             contains,
             remove,
             forEachValue: forEachValueInMap,
-            reduceProperties: reducePropertiesInMap,
             clear,
-            mergeFrom
         };
 
         function forEachValueInMap(f: (key: Path, value: T) => void) {
@@ -36,10 +34,6 @@ namespace ts {
             }
         }
 
-        function reducePropertiesInMap<U>(callback: (memo: U, value: T, key: Path) => U, initial: U) {
-            return reduceProperties(files, callback, initial);
-        }
-
         // path should already be well-formed so it does not need to be normalized
         function get(path: Path): T {
             return files[toKey(path)];
@@ -62,16 +56,6 @@ namespace ts {
             files = {};
         }
 
-        function mergeFrom(other: FileMap<T>) {
-            other.forEachValue(mergeFromOther);
-        }
-
-        function mergeFromOther(key: Path, value: T) {
-            if (!contains(key)) {
-                set(key, value);
-            }
-        }
-
         function toKey(path: Path): string {
             return keyMapper ? keyMapper(path) : path;
         }
@@ -131,6 +115,15 @@ namespace ts {
         return -1;
     }
 
+    export function indexOfAnyCharCode(text: string, charCodes: number[], start?: number): number {
+        for (let i = start || 0, len = text.length; i < len; ++i) {
+            if (contains(charCodes, text.charCodeAt(i))) {
+                return i;
+            }
+        }
+        return -1;
+    }
+
     export function countWhere<T>(array: T[], predicate: (x: T) => boolean): number {
         let count = 0;
         if (array) {
@@ -524,6 +517,10 @@ namespace ts {
         return a < b ? Comparison.LessThan : Comparison.GreaterThan;
     }
 
+    export function compareStringsCaseInsensitive(a: string, b: string) {
+        return compareStrings(a, b, /*ignoreCase*/ true);
+    }
+
     function getDiagnosticFileName(diagnostic: Diagnostic): string {
         return diagnostic.file ? diagnostic.file.fileName : undefined;
     }
@@ -861,6 +858,180 @@ namespace ts {
         return pathLen > extLen && path.substr(pathLen - extLen, extLen) === extension;
     }
 
+    export function fileExtensionIsAny(path: string, extensions: string[]): boolean {
+        for (const extension of extensions) {
+            if (fileExtensionIs(path, extension)) {
+                return true;
+            }
+        }
+
+        return false;
+    }
+
+
+    // Reserved characters, forces escaping of any non-word (or digit), non-whitespace character.
+    // It may be inefficient (we could just match (/[-[\]{}()*+?.,\\^$|#\s]/g), but this is future
+    // proof.
+    const reservedCharacterPattern = /[^\w\s\/]/g;
+    const wildcardCharCodes = [CharacterCodes.asterisk, CharacterCodes.question];
+
+    export function getRegularExpressionForWildcard(specs: string[], basePath: string, usage: "files" | "directories" | "exclude", useCaseSensitiveFileNames: boolean) {
+        if (specs === undefined || specs.length === 0) {
+            return undefined;
+        }
+
+        let pattern = "";
+        let hasWrittenSubpattern = false;
+        spec: for (const spec of specs) {
+            if (!spec) {
+                continue;
+            }
+
+            let subpattern = "";
+            let hasRecursiveDirectoryWildcard = false;
+            let hasWrittenComponent = false;
+            const components = getNormalizedPathComponents(spec, basePath);
+            if (usage !== "exclude" && components[components.length - 1] === "**") {
+                continue spec;
+            }
+
+            // getNormalizedPathComponents includes the separator for the root component.
+            // We need to remove to create our regex correctly.
+            components[0] = removeTrailingDirectorySeparator(components[0]);
+
+            let optionalCount = 0;
+            for (const component of components) {
+                if (component === "**") {
+                    if (hasRecursiveDirectoryWildcard) {
+                        continue spec;
+                    }
+
+                    subpattern += "(/.+?)?";
+                    hasRecursiveDirectoryWildcard = true;
+                    hasWrittenComponent = true;
+                }
+                else {
+                    if (usage === "directories") {
+                        subpattern += "(";
+                        optionalCount++;
+                    }
+
+                    if (hasWrittenComponent) {
+                        subpattern += directorySeparator;
+                    }
+
+                    subpattern += component.replace(reservedCharacterPattern, replaceWildcardCharacter);
+                    hasWrittenComponent = true;
+                }
+            }
+
+            while (optionalCount > 0) {
+                subpattern += ")?";
+                optionalCount--;
+            }
+
+            if (hasWrittenSubpattern) {
+                pattern += "|";
+            }
+
+            pattern += "(" + subpattern + ")";
+            hasWrittenSubpattern = true;
+        }
+
+        if (!pattern) {
+            return undefined;
+        }
+
+        return new RegExp("^(" + pattern + (usage === "exclude" ? ")($|/)" : ")$"), useCaseSensitiveFileNames ? "" : "i");
+    }
+
+    function replaceWildcardCharacter(match: string) {
+        return match === "*" ? "[^/]*" : match === "?" ? "[^/]" : "\\" + match;
+    }
+
+    export interface FileSystemEntries {
+        files: string[];
+        directories: string[];
+    }
+
+    export function matchFiles(path: string, extensions: string[], excludes: string[], includes: string[], useCaseSensitiveFileNames: boolean, currentDirectory: string, getFileSystemEntries: (path: string) => FileSystemEntries): string[] {
+        path = normalizePath(path);
+        currentDirectory = normalizePath(currentDirectory);
+        const absolutePath = combinePaths(currentDirectory, path);
+        const includeFileRegex = getRegularExpressionForWildcard(includes, absolutePath, "files", useCaseSensitiveFileNames);
+        const includeDirectoryRegex = getRegularExpressionForWildcard(includes, absolutePath, "directories", useCaseSensitiveFileNames);
+        const excludeRegex = getRegularExpressionForWildcard(excludes, absolutePath, "exclude", useCaseSensitiveFileNames);
+        const result: string[] = [];
+        for (const basePath of getBasePaths(path, includes, useCaseSensitiveFileNames)) {
+            visitDirectory(basePath, combinePaths(currentDirectory, basePath));
+        }
+        return result;
+
+        function visitDirectory(path: string, absolutePath: string) {
+            const { files, directories } = getFileSystemEntries(path);
+
+            for (const current of files) {
+                const name = combinePaths(path, current);
+                const absoluteName = combinePaths(absolutePath, current);
+                if ((!extensions || fileExtensionIsAny(name, extensions)) &&
+                    (!includeFileRegex || includeFileRegex.test(absoluteName)) &&
+                    (!excludeRegex || !excludeRegex.test(absoluteName))) {
+                    result.push(name);
+                }
+            }
+
+            for (const current of directories) {
+                const name = combinePaths(path, current);
+                const absoluteName = combinePaths(absolutePath, current);
+                if ((!includeDirectoryRegex || includeDirectoryRegex.test(absoluteName)) &&
+                    (!excludeRegex || !excludeRegex.test(absoluteName))) {
+                    visitDirectory(name, absoluteName);
+                }
+            }
+        }
+    }
+
+    /**
+     * Computes the unique non-wildcard base paths amongst the provided include patterns.
+     */
+    function getBasePaths(path: string, includes: string[], useCaseSensitiveFileNames: boolean) {
+        // Storage for our results in the form of literal paths (e.g. the paths as written by the user).
+        const basePaths: string[] = [path];
+        if (includes) {
+            // Storage for literal base paths amongst the include patterns.
+            const includeBasePaths: string[] = [];
+            for (const include of includes) {
+                if (isRootedDiskPath(include)) {
+                    const wildcardOffset = indexOfAnyCharCode(include, wildcardCharCodes);
+                    const includeBasePath = wildcardOffset < 0
+                        ? removeTrailingDirectorySeparator(getDirectoryPath(include))
+                        : include.substring(0, include.lastIndexOf(directorySeparator, wildcardOffset));
+
+                    // Append the literal and canonical candidate base paths.
+                    includeBasePaths.push(includeBasePath);
+                }
+            }
+
+            // Sort the offsets array using either the literal or canonical path representations.
+            includeBasePaths.sort(useCaseSensitiveFileNames ? compareStrings : compareStringsCaseInsensitive);
+
+            // Iterate over each include base path and include unique base paths that are not a
+            // subpath of an existing base path
+            include: for (let i = 0; i < includeBasePaths.length; ++i) {
+                const includeBasePath = includeBasePaths[i];
+                for (let j = 0; j < basePaths.length; ++j) {
+                    if (containsPath(basePaths[j], includeBasePath, path, !useCaseSensitiveFileNames)) {
+                        continue include;
+                    }
+                }
+
+                basePaths.push(includeBasePath);
+            }
+        }
+
+        return basePaths;
+    }
+
     /**
      *  List of supported extensions in order of file resolution precedence.
      */
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 5ff8dbf6796..cad64adb4cf 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -16,9 +16,7 @@ namespace ts {
         createDirectory(path: string): void;
         getExecutingFilePath(): string;
         getCurrentDirectory(): string;
-        readDirectory(path: string, extension?: string, exclude?: string[]): string[];
-        readFileNames(path: string): string[];
-        readDirectoryNames(path: string): string[];
+        readDirectory(path: string, extensions?: string[], exclude?: string[], include?: string[]): string[];
         getMemoryUsage?(): number;
         exit(exitCode?: number): void;
     }
@@ -61,9 +59,7 @@ namespace ts {
         resolvePath(path: string): string;
         readFile(path: string): string;
         writeFile(path: string, contents: string): void;
-        readDirectory(path: string, extension?: string, exclude?: string[]): string[];
-        readDirectoryNames(path: string): string[];
-        readFileNames(path: string): string[];
+        readDirectory(path: string, extensions?: string[], exclude?: string[], include?: string[]): string[];
     };
 
     export var sys: System = (function () {
@@ -71,6 +67,7 @@ namespace ts {
         function getWScriptSystem(): System {
 
             const fso = new ActiveXObject("Scripting.FileSystemObject");
+            const shell = new ActiveXObject("WScript.Shell");
 
             const fileStream = new ActiveXObject("ADODB.Stream");
             fileStream.Type = 2 /*text*/;
@@ -150,38 +147,20 @@ namespace ts {
                 return result.sort();
             }
 
-            function readDirectory(path: string, extension?: string, exclude?: string[]): string[] {
-                const result: string[] = [];
-                exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
-                visitDirectory(path);
-                return result;
-                function visitDirectory(path: string) {
+            function getAccessibleFileSystemEntries(path: string): FileSystemEntries {
+                try {
                     const folder = fso.GetFolder(path || ".");
                     const files = getNames(folder.files);
-                    for (const current of files) {
-                        const name = combinePaths(path, current);
-                        if ((!extension || fileExtensionIs(name, extension)) && !contains(exclude, getCanonicalPath(name))) {
-                            result.push(name);
-                        }
-                    }
-                    const subfolders = getNames(folder.subfolders);
-                    for (const current of subfolders) {
-                        const name = combinePaths(path, current);
-                        if (!contains(exclude, getCanonicalPath(name))) {
-                            visitDirectory(name);
-                        }
-                    }
+                    const directories = getNames(folder.subfolders);
+                    return { files, directories };
+                }
+                catch (e) {
+                    return { files: [], directories: [] };
                 }
             }
 
-            function readFileNames(path: string): string[] {
-                const folder = fso.GetFolder(path || ".");
-                return getNames(folder.files);
-            }
-
-            function readDirectoryNames(path: string): string[] {
-                const folder = fso.GetFolder(path || ".");
-                return getNames(folder.directories);
+            function readDirectory(path: string, extensions?: string[], excludes?: string[], includes?: string[]): string[] {
+                return matchFiles(path, extensions, excludes, includes, /*useCaseSensitiveFileNames*/ false, shell.CurrentDirectory, getAccessibleFileSystemEntries);
             }
 
             return {
@@ -211,11 +190,9 @@ namespace ts {
                     return WScript.ScriptFullName;
                 },
                 getCurrentDirectory() {
-                    return new ActiveXObject("WScript.Shell").CurrentDirectory;
+                    return shell.CurrentDirectory;
                 },
                 readDirectory,
-                readFileNames,
-                readDirectoryNames,
                 exit(exitCode?: number): void {
                     try {
                         WScript.Quit(exitCode);
@@ -385,56 +362,30 @@ namespace ts {
                 return useCaseSensitiveFileNames ? path.toLowerCase() : path;
             }
 
-            function readDirectory(path: string, extension?: string, exclude?: string[]): string[] {
-                const result: string[] = [];
-                exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
-                visitDirectory(path);
-                return result;
-                function visitDirectory(path: string) {
-                    const files = _fs.readdirSync(path || ".").sort();
+            function getAccessibleFileSystemEntries(path: string): FileSystemEntries {
+                try {
+                    const entries = _fs.readdirSync(path || ".").sort();
+                    const files: string[] = [];
                     const directories: string[] = [];
-                    for (const current of files) {
-                        const name = combinePaths(path, current);
-                        if (!contains(exclude, getCanonicalPath(name))) {
-                            const stat = _fs.statSync(name);
-                            if (stat.isFile()) {
-                                if (!extension || fileExtensionIs(name, extension)) {
-                                    result.push(name);
-                                }
-                            }
-                            else if (stat.isDirectory()) {
-                                directories.push(name);
-                            }
+                    for (const entry of entries) {
+                        const name = combinePaths(path, entry);
+                        const stat = _fs.statSync(name);
+                        if (stat.isFile()) {
+                            files.push(entry);
+                        }
+                        else if (stat.isDirectory()) {
+                            directories.push(entry);
                         }
                     }
-                    for (const current of directories) {
-                        visitDirectory(current);
-                    }
+                    return { files, directories };
+                }
+                catch (e) {
+                    return { files: [], directories: [] };
                 }
             }
 
-            function readFileNames(path: string): string[] {
-                const entries = _fs.readdirSync(path || ".");
-                const files: string[] = [];
-                for (const entry of entries) {
-                    const stat = _fs.statSync(combinePaths(path, entry));
-                    if (stat.isFile()) {
-                        files.push(entry);
-                    }
-                }
-                return files.sort();
-            }
-
-            function readDirectoryNames(path: string): string[] {
-                const entries = _fs.readdirSync(path || ".");
-                const directories: string[] = [];
-                for (const entry of entries) {
-                    const stat = _fs.statSync(combinePaths(path, entry));
-                    if (stat.isDirectory()) {
-                        directories.push(entry);
-                    }
-                }
-                return directories.sort();
+            function readDirectory(path: string, extensions?: string[], excludes?: string[], includes?: string[]): string[] {
+                return matchFiles(path, extensions, excludes, includes, useCaseSensitiveFileNames, process.cwd(), getAccessibleFileSystemEntries);
             }
 
             return {
@@ -482,7 +433,7 @@ namespace ts {
                     return _path.resolve(path);
                 },
                 fileExists(path: string): boolean {
-                    return _fs.existsSync(path) && _fs.statSync(path).isFile();
+                    return _fs.existsSync(path);
                 },
                 directoryExists(path: string) {
                     return _fs.existsSync(path) && _fs.statSync(path).isDirectory();
@@ -499,8 +450,6 @@ namespace ts {
                     return process.cwd();
                 },
                 readDirectory,
-                readFileNames,
-                readDirectoryNames,
                 getMemoryUsage() {
                     if (global.gc) {
                         global.gc();
@@ -539,8 +488,6 @@ namespace ts {
                 getExecutingFilePath: () => ChakraHost.executingFile,
                 getCurrentDirectory: () => ChakraHost.currentDirectory,
                 readDirectory: ChakraHost.readDirectory,
-                readFileNames: ChakraHost.readFileNames,
-                readDirectoryNames: ChakraHost.readDirectoryNames,
                 exit: ChakraHost.quit,
             };
         }
@@ -560,6 +507,4 @@ namespace ts {
             return undefined; // Unsupported host
         }
     })();
-}
-
-
+}
\ No newline at end of file
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 4c62904f4e8..3ddc0b447a9 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -14,8 +14,6 @@ namespace ts {
         remove(fileName: Path): void;
 
         forEachValue(f: (key: Path, v: T) => void): void;
-        reduceProperties<U>(f: (memo: U, value: T, key: Path) => U, initial: U): U;
-        mergeFrom(other: FileMap<T>): void;
         clear(): void;
     }
 
@@ -1586,31 +1584,13 @@ namespace ts {
     export interface ParseConfigHost {
         useCaseSensitiveFileNames: boolean;
 
-        readDirectory(rootDir: string, extension: string, exclude: string[]): string[];
+        readDirectory(rootDir: string, extensions: string[], excludes: string[], includes: string[]): string[];
 
         /**
           * Gets a value indicating whether the specified path exists and is a file.
           * @param path The path to test.
           */
         fileExists(path: string): boolean;
-
-        /**
-          * Gets a value indicating whether the specified path exists and is a directory.
-          * @param path The path to test.
-          */
-        directoryExists(path: string): boolean;
-
-        /**
-         * Reads the files names in the directory.
-         * @param rootDir The directory path.
-         */
-        readFileNames(rootDir: string): string[];
-
-        /**
-         * Reads the directory names in the directory.
-         * @param rootDir The directory path.
-         */
-        readDirectoryNames(rootDir: string): string[];
     }
 
     export interface WriteFileCallback {
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index d8ccc512343..509c193666f 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -23,6 +23,7 @@
 /// <reference path="external\chai.d.ts"/>
 /// <reference path="sourceMapRecorder.ts"/>
 /// <reference path="runnerbase.ts"/>
+/// <reference path="vfs.ts" />
 /* tslint:disable:no-null */
 
 // Block scoped definitions work poorly for global variables, temporarily enable var
@@ -435,9 +436,7 @@ namespace Harness {
         args(): string[];
         getExecutingFilePath(): string;
         exit(exitCode?: number): void;
-        readDirectory(path: string, extension?: string, exclude?: string[]): string[];
-        readDirectoryNames(path: string): string[];
-        readFileNames(path: string): string[];
+        readDirectory(path: string, extension?: string[], exclude?: string[], include?: string[]): string[];
     }
     export var IO: IO;
 
@@ -475,9 +474,7 @@ namespace Harness {
             export const directoryExists: typeof IO.directoryExists = fso.FolderExists;
             export const fileExists: typeof IO.fileExists = fso.FileExists;
             export const log: typeof IO.log = global.WScript && global.WScript.StdOut.WriteLine;
-            export const readDirectory: typeof IO.readDirectory = (path, extension, exclude) => ts.sys.readDirectory(path, extension, exclude);
-            export const readDirectoryNames: typeof IO.readDirectoryNames = path => ts.sys.readDirectoryNames(path);
-            export const readFileNames: typeof IO.readFileNames = path => ts.sys.readFileNames(path);
+            export const readDirectory: typeof IO.readDirectory = (path, extension, exclude, include) => ts.sys.readDirectory(path, extension, exclude, include);
 
             export function createDirectory(path: string) {
                 if (directoryExists(path)) {
@@ -547,9 +544,7 @@ namespace Harness {
             export const fileExists: typeof IO.fileExists = fs.existsSync;
             export const log: typeof IO.log = s => console.log(s);
 
-            export const readDirectory: typeof IO.readDirectory = (path, extension, exclude) => ts.sys.readDirectory(path, extension, exclude);
-            export const readDirectoryNames: typeof IO.readDirectoryNames = path => ts.sys.readDirectoryNames(path);
-            export const readFileNames: typeof IO.readFileNames = path => ts.sys.readFileNames(path);
+            export const readDirectory: typeof IO.readDirectory = (path, extension, exclude, include) => ts.sys.readDirectory(path, extension, exclude, include);
 
             export function createDirectory(path: string) {
                 if (!directoryExists(path)) {
@@ -755,16 +750,22 @@ namespace Harness {
                 Http.writeToServerSync(serverRoot + path, "WRITE", contents);
             }
 
-            export function readDirectory(path: string, extension?: string, exclude?: string[]) {
-                return listFiles(path).filter(f => !extension || ts.fileExtensionIs(f, extension));
-            }
-
-            export function readDirectoryNames(path: string): string[] {
-                return [];
-            }
-
-            export function readFileNames(path: string) {
-                return readDirectory(path);
+            export function readDirectory(path: string, extension?: string[], exclude?: string[], include?: string[]) {
+                const fs = new Utils.VirtualFileSystem(path, useCaseSensitiveFileNames());
+                for (const file in listFiles(path)) {
+                    fs.addFile(file);
+                }
+                return ts.matchFiles(path, extension, exclude, include, useCaseSensitiveFileNames(), getCurrentDirectory(), path => {
+                    const entry = fs.traversePath(path);
+                    if (entry && entry.isDirectory()) {
+                        const directory = <Utils.VirtualDirectory>entry;
+                        return {
+                            files: ts.map(directory.getFiles(), f => f.name),
+                            directories: ts.map(directory.getDirectories(), d => d.name)
+                        };
+                    }
+                    return { files: [], directories: [] };
+                });
             }
         }
     }
diff --git a/src/harness/harnessLanguageService.ts b/src/harness/harnessLanguageService.ts
index 521d17cfc8f..4db96f344df 100644
--- a/src/harness/harnessLanguageService.ts
+++ b/src/harness/harnessLanguageService.ts
@@ -575,18 +575,10 @@ namespace Harness.LanguageService {
             return this.host.getCurrentDirectory();
         }
 
-        readDirectory(path: string, extension?: string): string[] {
+        readDirectory(path: string, extension?: string[], exclude?: string[], include?: string[]): string[] {
             throw new Error("Not implemented Yet.");
         }
 
-        readDirectoryNames(path: string): string[] {
-            throw new Error("Not implemented.");
-        }
-
-        readFileNames(path: string): string[] {
-            throw new Error("Not implemented.");
-        }
-
         watchFile(fileName: string, callback: (fileName: string) => void): ts.FileWatcher {
             return { close() { } };
         }
diff --git a/src/harness/loggedIO.ts b/src/harness/loggedIO.ts
index 0bae91f7976..a6df6382bd0 100644
--- a/src/harness/loggedIO.ts
+++ b/src/harness/loggedIO.ts
@@ -62,8 +62,9 @@ interface IOLog {
     }[];
     directoriesRead: {
         path: string,
-        extension: string,
+        extension: string[],
         exclude: string[],
+        include: string[],
         result: string[]
     }[];
 }
@@ -217,9 +218,9 @@ namespace Playback {
             memoize(path => findResultByPath(wrapper, replayLog.filesRead, path).contents));
 
         wrapper.readDirectory = recordReplay(wrapper.readDirectory, underlying)(
-            (path, extension, exclude) => {
-                const result = (<ts.System>underlying).readDirectory(path, extension, exclude);
-                const logEntry = { path, extension, exclude, result };
+            (path, extension, exclude, include) => {
+                const result = (<ts.System>underlying).readDirectory(path, extension, exclude, include);
+                const logEntry = { path, extension, exclude, include, result };
                 recordLog.directoriesRead.push(logEntry);
                 return result;
             },
diff --git a/src/harness/projectsRunner.ts b/src/harness/projectsRunner.ts
index 76c7952428a..bff391cf9af 100644
--- a/src/harness/projectsRunner.ts
+++ b/src/harness/projectsRunner.ts
@@ -213,10 +213,7 @@ class ProjectRunner extends RunnerBase {
                 const configParseHost: ts.ParseConfigHost = {
                     useCaseSensitiveFileNames: Harness.IO.useCaseSensitiveFileNames(),
                     fileExists,
-                    directoryExists,
                     readDirectory,
-                    readDirectoryNames,
-                    readFileNames
                 };
                 const configParseResult = ts.parseJsonConfigFileContent(configObject, configParseHost, ts.getDirectoryPath(configFileName), compilerOptions);
                 if (configParseResult.errors.length > 0) {
@@ -276,8 +273,8 @@ class ProjectRunner extends RunnerBase {
                     : ts.normalizeSlashes(testCase.projectRoot) + "/" + ts.normalizeSlashes(fileName);
             }
 
-            function readDirectory(rootDir: string, extension: string, exclude: string[]): string[] {
-                const harnessReadDirectoryResult = Harness.IO.readDirectory(getFileNameInTheProjectTest(rootDir), extension, exclude);
+            function readDirectory(rootDir: string, extension: string[], exclude: string[], include: string[]): string[] {
+                const harnessReadDirectoryResult = Harness.IO.readDirectory(getFileNameInTheProjectTest(rootDir), extension, exclude, include);
                 const result: string[] = [];
                 for (let i = 0; i < harnessReadDirectoryResult.length; i++) {
                     result[i] = ts.getRelativePathToDirectoryOrUrl(testCase.projectRoot, harnessReadDirectoryResult[i],
@@ -286,14 +283,6 @@ class ProjectRunner extends RunnerBase {
                 return result;
             }
 
-            function readDirectoryNames(path: string) {
-                return Harness.IO.readDirectoryNames(getFileNameInTheProjectTest(path));
-            }
-
-            function readFileNames(path: string) {
-                return Harness.IO.readFileNames(getFileNameInTheProjectTest(path));
-            }
-
             function fileExists(fileName: string): boolean {
                 return Harness.IO.fileExists(getFileNameInTheProjectTest(fileName));
             }
diff --git a/src/harness/rwcRunner.ts b/src/harness/rwcRunner.ts
index 826f6b67260..791c684c79c 100644
--- a/src/harness/rwcRunner.ts
+++ b/src/harness/rwcRunner.ts
@@ -79,10 +79,7 @@ namespace RWC {
                         const configParseHost: ts.ParseConfigHost = {
                             useCaseSensitiveFileNames: Harness.IO.useCaseSensitiveFileNames(),
                             fileExists: Harness.IO.fileExists,
-                            directoryExists: Harness.IO.directoryExists,
                             readDirectory: Harness.IO.readDirectory,
-                            readDirectoryNames: Harness.IO.readDirectoryNames,
-                            readFileNames: Harness.IO.readFileNames,
                         };
                         const configParseResult = ts.parseJsonConfigFileContent(parsedTsconfigFileContents.config, configParseHost, ts.getDirectoryPath(tsconfigFile.path));
                         fileNames = configParseResult.fileNames;
diff --git a/src/harness/vfs.ts b/src/harness/vfs.ts
new file mode 100644
index 00000000000..66bbd715fbc
--- /dev/null
+++ b/src/harness/vfs.ts
@@ -0,0 +1,160 @@
+/// <reference path="harness.ts" />
+namespace Utils {
+    export class VirtualFileSystemEntry {
+        fileSystem: VirtualFileSystem;
+        name: string;
+
+        constructor(fileSystem: VirtualFileSystem, name: string) {
+            this.fileSystem = fileSystem;
+            this.name = name;
+        }
+
+        isDirectory() { return false; }
+        isFile() { return false; }
+        isFileSystem() { return false; }
+    }
+
+    export class VirtualFile extends VirtualFileSystemEntry {
+        content: string;
+        isFile() { return true; }
+    }
+
+    export abstract class VirtualFileSystemContainer extends VirtualFileSystemEntry {
+        abstract getFileSystemEntries(): VirtualFileSystemEntry[];
+
+        getFileSystemEntry(name: string): VirtualFileSystemEntry {
+            for (const entry of this.getFileSystemEntries()) {
+                if (this.fileSystem.sameName(entry.name, name)) {
+                    return entry;
+                }
+            }
+            return undefined;
+        }
+
+        getDirectories(): VirtualDirectory[] {
+            return <VirtualDirectory[]>ts.filter(this.getFileSystemEntries(), entry => entry.isDirectory());
+        }
+
+        getFiles(): VirtualFile[] {
+            return <VirtualFile[]>ts.filter(this.getFileSystemEntries(), entry => entry.isFile());
+        }
+
+        getDirectory(name: string): VirtualDirectory {
+            const entry = this.getFileSystemEntry(name);
+            return entry.isDirectory() ? <VirtualDirectory>entry : undefined;
+        }
+
+        getFile(name: string): VirtualFile {
+            const entry = this.getFileSystemEntry(name);
+            return entry.isFile() ? <VirtualFile>entry : undefined;
+        }
+    }
+
+    export class VirtualDirectory extends VirtualFileSystemContainer {
+        private entries: VirtualFileSystemEntry[] = [];
+
+        isDirectory() { return true; }
+
+        getFileSystemEntries() { return this.entries.slice(); }
+
+        addDirectory(name: string): VirtualDirectory {
+            const entry = this.getFileSystemEntry(name);
+            if (entry === undefined) {
+                const directory = new VirtualDirectory(this.fileSystem, name);
+                this.entries.push(directory);
+                return directory;
+            }
+            else if (entry.isDirectory()) {
+                return <VirtualDirectory>entry;
+            }
+            else {
+                return undefined;
+            }
+        }
+
+        addFile(name: string, content?: string): VirtualFile {
+            const entry = this.getFileSystemEntry(name);
+            if (entry === undefined) {
+                const file = new VirtualFile(this.fileSystem, name);
+                file.content = content;
+                this.entries.push(file);
+                return file;
+            }
+            else if (entry.isFile()) {
+                const file = <VirtualFile>entry;
+                file.content = content;
+                return file;
+            }
+            else {
+                return undefined;
+            }
+        }
+    }
+
+    export class VirtualFileSystem extends VirtualFileSystemContainer {
+        private root: VirtualDirectory;
+
+        currentDirectory: string;
+        useCaseSensitiveFileNames: boolean;
+
+        constructor(currentDirectory: string, useCaseSensitiveFileNames: boolean) {
+            super(undefined, "");
+            this.fileSystem = this;
+            this.root = new VirtualDirectory(this, "");
+            this.currentDirectory = currentDirectory;
+            this.useCaseSensitiveFileNames = useCaseSensitiveFileNames;
+        }
+
+        isFileSystem() { return true; }
+
+        getFileSystemEntries() { return this.root.getFileSystemEntries(); }
+
+        addDirectory(path: string) {
+            const components = ts.getNormalizedPathComponents(path, this.currentDirectory);
+            let directory: VirtualDirectory = this.root;
+            for (const component of components) {
+                directory = directory.addDirectory(component);
+                if (directory === undefined) {
+                    break;
+                }
+            }
+
+            return directory;
+        }
+
+        addFile(path: string, content?: string) {
+            const absolutePath = ts.getNormalizedAbsolutePath(path, this.currentDirectory);
+            const fileName = ts.getBaseFileName(path);
+            const directoryPath = ts.getDirectoryPath(absolutePath);
+            const directory = this.addDirectory(directoryPath);
+            return directory ? directory.addFile(fileName, content) : undefined;
+        }
+
+        fileExists(path: string) {
+            const entry = this.traversePath(path);
+            return entry !== undefined && entry.isFile();
+        }
+
+        sameName(a: string, b: string) {
+            return this.useCaseSensitiveFileNames ? a === b : a.toLowerCase() === b.toLowerCase();
+        }
+
+        traversePath(path: string) {
+            let directory: VirtualDirectory = this.root;
+            for (const component of ts.getNormalizedPathComponents(path, this.currentDirectory)) {
+                const entry = directory.getFileSystemEntry(component);
+                if (entry === undefined) {
+                    return undefined;
+                }
+                else if (entry.isDirectory()) {
+                    directory = <VirtualDirectory>entry;
+                }
+                else {
+                    return entry;
+                }
+            }
+
+            return directory;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/services/shims.ts b/src/services/shims.ts
index a7f85d24452..cf6f3885a2c 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -72,10 +72,7 @@ namespace ts {
          * @param exclude A JSON encoded string[] containing the paths to exclude
          *  when enumerating the directory.
          */
-        readDirectory(rootDir: string, extension: string, exclude?: string): string;
-        readDirectoryNames?(rootDir: string): string;
-        readFileNames?(rootDir: string): string;
-        directoryExists?(path: string): boolean;
+        readDirectory(rootDir: string, extension: string, exclude?: string, include?: string): string;
         useCaseSensitiveFileNames?: boolean;
     }
 
@@ -425,70 +422,43 @@ namespace ts {
             }
         }
 
-        public readDirectory(rootDir: string, extension: string, exclude: string[]): string[] {
-            // Wrap the API changes for 1.5 release. This try/catch
-            // should be removed once TypeScript 1.5 has shipped.
+        public readDirectory(rootDir: string, extensions: string[], exclude: string[], include: string[]): string[] {
+            // Wrap the API changes for 1.8 release. This try/catch
+            // should be removed once TypeScript 1.8 has shipped.
             // Also consider removing the optional designation for
             // the exclude param at this time.
-            var encoded: string;
             try {
-                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude));
+                return JSON.parse(this.shimHost.readDirectory(
+                    rootDir,
+                    JSON.stringify(extensions),
+                    JSON.stringify(exclude),
+                    JSON.stringify(include)));
             }
             catch (e) {
-                encoded = this.shimHost.readDirectory(rootDir, extension);
+                let results: string[] = [];
+                for (const extension of extensions) {
+                    for (const file of this.readDirectoryFallback(rootDir, extension, exclude))
+                    {
+                        if (!contains(results, file)) {
+                            results.push(file);
+                        }
+                    }
+                }
+                return results;
             }
-            return JSON.parse(encoded);
-        }
-
-        public readDirectoryNames(path: string): string[] {
-            if (this.shimHost.readDirectory) {
-                const encoded = this.shimHost.readDirectoryNames(path);
-                return JSON.parse(encoded);
-            }
-
-            if (sys) {
-                path = normalizePath(path);
-                path = ensureTrailingDirectorySeparator(path);
-                return sys.readDirectoryNames(path);
-            }
-
-            return [];
-        }
-
-        public readFileNames(path: string): string[] {
-            if (this.shimHost.readFileNames) {
-                const encoded = this.shimHost.readFileNames(path);
-                return JSON.parse(encoded);
-            }
-
-            if (sys) {
-                path = normalizePath(path);
-                path = ensureTrailingDirectorySeparator(path);
-                return sys.readFileNames(path);
-            }
-
-            return [];
         }
 
         public fileExists(fileName: string): boolean {
             return this.shimHost.fileExists(fileName);
         }
 
-        public directoryExists(directoryName: string): boolean {
-            if (this.shimHost.directoryExists) {
-                return this.shimHost.directoryExists(directoryName);
-            }
-
-            if (sys) {
-                return sys.directoryExists(directoryName);
-            }
-
-            return false;
-        }
-
         public readFile(fileName: string): string {
             return this.shimHost.readFile(fileName);
         }
+
+        private readDirectoryFallback(rootDir: string, extension: string, exclude: string[]) {
+            return JSON.parse(this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude)));
+        }
     }
 
     function simpleForwardCall(logger: Logger, actionDescription: string, action: () => any, logPerformance: boolean): any {
diff --git a/tests/cases/unittests/cachingInServerLSHost.ts b/tests/cases/unittests/cachingInServerLSHost.ts
index f0a138c27a1..0d2a9ebf54d 100644
--- a/tests/cases/unittests/cachingInServerLSHost.ts
+++ b/tests/cases/unittests/cachingInServerLSHost.ts
@@ -36,11 +36,9 @@ module ts {
             getCurrentDirectory: (): string => {
                 return "";
             },
-            readDirectory: (path: string, extension?: string, exclude?: string[]): string[] => {
+            readDirectory: (path: string, extension?: string[], exclude?: string[], include?: string[]): string[] => {
                 throw new Error("NYI");
             },
-            readDirectoryNames: (path: string): string[] => { throw new Error("NYI"); },
-            readFileNames: (path: string): string[] => { throw new Error("NYI"); },
             exit: (exitCode?: number) => {
             },
             watchFile: (path, callback) => {
diff --git a/tests/cases/unittests/expandFiles.ts b/tests/cases/unittests/expandFiles.ts
index 3aac938f178..02065407e27 100644
--- a/tests/cases/unittests/expandFiles.ts
+++ b/tests/cases/unittests/expandFiles.ts
@@ -2,65 +2,91 @@
 /// <reference path="..\..\..\src\harness\harness.ts" />
 
 namespace ts {
+    class MockParseConfigHost extends Utils.VirtualFileSystem implements ParseConfigHost {
+        constructor(currentDirectory: string, ignoreCase: boolean, files: string[]) {
+            super(currentDirectory, ignoreCase);
+            for (const file of files) {
+                this.addFile(file);
+            }
+        }
+
+        readDirectory(path: string, extensions: string[], excludes: string[], includes: string[]) {
+            return matchFiles(path, extensions, excludes, includes, this.useCaseSensitiveFileNames, this.currentDirectory, (path: string) => this.getAccessibleFileSystemEntries(path));
+        }
+
+        getAccessibleFileSystemEntries(path: string) {
+            const entry = this.traversePath(path);
+            if (entry && entry.isDirectory()) {
+                const directory = <Utils.VirtualDirectory>entry;
+                return {
+                    files: map(directory.getFiles(), f => f.name),
+                    directories: map(directory.getDirectories(), d => d.name)
+                };
+            }
+            return { files: [], directories: [] };
+        }
+    }
+
     const caseInsensitiveBasePath = "c:/dev/";
-    const caseInsensitiveHost = createMockParseConfigHost(/*ignoreCase*/ true, caseInsensitiveBasePath, [
-        "a.ts",
-        "a.d.ts",
-        "a.js",
-        "b.ts",
-        "b.js",
-        "c.d.ts",
-        "z/a.ts",
-        "z/abz.ts",
-        "z/aba.ts",
-        "z/b.ts",
-        "z/bbz.ts",
-        "z/bba.ts",
-        "x/a.ts",
-        "x/aa.ts",
-        "x/b.ts",
-        "x/y/a.ts",
-        "x/y/b.ts",
-        "js/a.js",
-        "js/b.js",
+    const caseInsensitiveHost = new MockParseConfigHost(caseInsensitiveBasePath, /*useCaseSensitiveFileNames*/ false, [
+        "c:/dev/a.ts",
+        "c:/dev/a.d.ts",
+        "c:/dev/a.js",
+        "c:/dev/b.ts",
+        "c:/dev/b.js",
+        "c:/dev/c.d.ts",
+        "c:/dev/z/a.ts",
+        "c:/dev/z/abz.ts",
+        "c:/dev/z/aba.ts",
+        "c:/dev/z/b.ts",
+        "c:/dev/z/bbz.ts",
+        "c:/dev/z/bba.ts",
+        "c:/dev/x/a.ts",
+        "c:/dev/x/aa.ts",
+        "c:/dev/x/b.ts",
+        "c:/dev/x/y/a.ts",
+        "c:/dev/x/y/b.ts",
+        "c:/dev/js/a.js",
+        "c:/dev/js/b.js",
+        "c:/ext/ext.ts"
     ]);
 
     const caseSensitiveBasePath = "/dev/";
-    const caseSensitiveHost = createMockParseConfigHost(/*ignoreCase*/ false, caseSensitiveBasePath, [
-        "a.ts",
-        "a.d.ts",
-        "a.js",
-        "b.ts",
-        "b.js",
-        "A.ts",
-        "B.ts",
-        "c.d.ts",
-        "z/a.ts",
-        "z/abz.ts",
-        "z/aba.ts",
-        "z/b.ts",
-        "z/bbz.ts",
-        "z/bba.ts",
-        "x/a.ts",
-        "x/b.ts",
-        "x/y/a.ts",
-        "x/y/b.ts",
-        "js/a.js",
-        "js/b.js",
+    const caseSensitiveHost = new MockParseConfigHost(caseSensitiveBasePath, /*useCaseSensitiveFileNames*/ true, [
+        "/dev/a.ts",
+        "/dev/a.d.ts",
+        "/dev/a.js",
+        "/dev/b.ts",
+        "/dev/b.js",
+        "/dev/A.ts",
+        "/dev/B.ts",
+        "/dev/c.d.ts",
+        "/dev/z/a.ts",
+        "/dev/z/abz.ts",
+        "/dev/z/aba.ts",
+        "/dev/z/b.ts",
+        "/dev/z/bbz.ts",
+        "/dev/z/bba.ts",
+        "/dev/x/a.ts",
+        "/dev/x/b.ts",
+        "/dev/x/y/a.ts",
+        "/dev/x/y/b.ts",
+        "/dev/js/a.js",
+        "/dev/js/b.js",
     ]);
 
-    const caseInsensitiveMixedExtensionHost = createMockParseConfigHost(/*ignoreCase*/ true, caseInsensitiveBasePath, [
-        "a.ts",
-        "a.d.ts",
-        "a.js",
-        "b.tsx",
-        "b.d.ts",
-        "b.jsx",
-        "c.tsx",
-        "c.js",
-        "d.js",
-        "e.jsx",
-        "f.other"
+    const caseInsensitiveMixedExtensionHost = new MockParseConfigHost(caseInsensitiveBasePath, /*useCaseSensitiveFileNames*/ false, [
+        "c:/dev/a.ts",
+        "c:/dev/a.d.ts",
+        "c:/dev/a.js",
+        "c:/dev/b.tsx",
+        "c:/dev/b.d.ts",
+        "c:/dev/b.jsx",
+        "c:/dev/c.tsx",
+        "c:/dev/c.js",
+        "c:/dev/d.js",
+        "c:/dev/e.jsx",
+        "c:/dev/f.other"
     ]);
 
     describe("expandFiles", () => {
@@ -226,7 +252,7 @@ namespace ts {
                 const expected: ts.ExpandResult = {
                     fileNames: [],
                     wildcardDirectories: {
-                        "c:/dev": ts.WatchDirectoryFlags.None
+                        "c:/dev": ts.WatchDirectoryFlags.Recursive
                     },
                 };
                 const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
@@ -239,7 +265,7 @@ namespace ts {
                 const expected: ts.ExpandResult = {
                     fileNames: ["c:/dev/a.ts"],
                     wildcardDirectories: {
-                        "c:/dev": ts.WatchDirectoryFlags.None
+                        "c:/dev": ts.WatchDirectoryFlags.Recursive
                     },
                 };
                 const actual = ts.expandFiles(fileNames, includeSpecs, excludeSpecs, caseInsensitiveBasePath, {}, caseInsensitiveHost);
@@ -283,6 +309,23 @@ namespace ts {
                 const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, { allowJs: true }, caseInsensitiveHost);
                 assert.deepEqual(actual, expected);
             });
+            it("include paths outside of the project", () => {
+                const includeSpecs = ["*", "c:/ext/*"];
+                const expected: ts.ExpandResult = {
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/b.ts",
+                        "c:/dev/c.d.ts",
+                        "c:/ext/ext.ts",
+                    ],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.None,
+                        "c:/ext": ts.WatchDirectoryFlags.None
+                    }
+                };
+                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                assert.deepEqual(actual, expected);
+            });
         });
 
         describe("when called from parseJsonConfigFileContent", () => {
@@ -376,110 +419,4 @@ namespace ts {
             });
         });
     });
-
-    interface DirectoryEntry {
-        files: ts.Map<string>;
-        directories: ts.Map<string>;
-    }
-
-    interface TestParseConfigHost extends ts.ParseConfigHost {
-        basePath: string;
-    }
-
-    function createMockParseConfigHost(ignoreCase: boolean, basePath: string, files: string[]): TestParseConfigHost {
-        const fileSet: ts.Map<string> = {};
-        const directorySet: ts.Map<DirectoryEntry> = {};
-        const emptyDirectory: DirectoryEntry = { files: {}, directories: {} };
-
-        files.sort((a, b) => ts.comparePaths(a, b, basePath, ignoreCase));
-        for (const file of files) {
-            addFile(ts.getNormalizedAbsolutePath(file, basePath));
-        }
-
-        return {
-            useCaseSensitiveFileNames: !ignoreCase,
-            basePath,
-            fileExists,
-            directoryExists,
-            readDirectory,
-            readFileNames,
-            readDirectoryNames
-        };
-
-        function fileExists(path: string): boolean {
-            path = ts.getNormalizedAbsolutePath(path, basePath);
-            path = ts.removeTrailingDirectorySeparator(path);
-            const fileKey = ignoreCase ? path.toLowerCase() : path;
-            return ts.hasProperty(fileSet, fileKey);
-        }
-
-        function directoryExists(path: string): boolean {
-            path = ts.getNormalizedAbsolutePath(path, basePath);
-            path = ts.removeTrailingDirectorySeparator(path);
-            const directoryKey = ignoreCase ? path.toLowerCase() : path;
-            return ts.hasProperty(directorySet, directoryKey);
-        }
-
-        function readDirectory(rootDir: string, extension?: string, exclude?: string[]): string[] {
-            throw new Error("Not implemented");
-        }
-
-        function readFileNames(path: string) {
-            const { files } = getDirectoryEntry(path) || emptyDirectory;
-            const result: string[] = [];
-            ts.forEachKey(files, key => { result.push(key); });
-            result.sort((a, b) => ts.compareStrings(a, b, ignoreCase));
-            return result;
-        }
-
-        function readDirectoryNames(path: string) {
-            const { directories } = getDirectoryEntry(path); // || emptyDirectory;
-            const result: string[] = [];
-            ts.forEachKey(directories, key => { result.push(key); });
-            result.sort((a, b) => ts.compareStrings(a, b, ignoreCase));
-            return result;
-        }
-
-        function getDirectoryEntry(path: string) {
-            path = ts.getNormalizedAbsolutePath(path, basePath);
-            path = ts.removeTrailingDirectorySeparator(path);
-            const directoryKey = ignoreCase ? path.toLowerCase() : path;
-            return ts.getProperty(directorySet, directoryKey);
-        }
-
-        function addFile(file: string) {
-            const fileKey = ignoreCase ? file.toLowerCase() : file;
-            if (!ts.hasProperty(fileSet, fileKey)) {
-                fileSet[fileKey] = file;
-                const name = ts.getBaseFileName(file);
-                const parent = ts.getDirectoryPath(file);
-                addToDirectory(parent, name, "file");
-            }
-        }
-
-        function addDirectory(directory: string) {
-            directory = ts.removeTrailingDirectorySeparator(directory);
-            const directoryKey = ignoreCase ? directory.toLowerCase() : directory;
-            if (!ts.hasProperty(directorySet, directoryKey)) {
-                directorySet[directoryKey] = { files: {}, directories: {} };
-                const name = ts.getBaseFileName(directory);
-                const parent = ts.getDirectoryPath(directory);
-                if (parent !== directory) {
-                    addToDirectory(parent, name, "directory");
-                }
-            }
-        }
-
-        function addToDirectory(directory: string, entry: string, type: "file" | "directory") {
-            addDirectory(directory);
-            directory = ts.removeTrailingDirectorySeparator(directory);
-            const directoryKey = ignoreCase ? directory.toLowerCase() : directory;
-            const entryKey = ignoreCase ? entry.toLowerCase() : entry;
-            const directoryEntry = directorySet[directoryKey];
-            const entries = type === "file" ? directoryEntry.files : directoryEntry.directories;
-            if (!ts.hasProperty(entries, entryKey)) {
-                entries[entryKey] = entry;
-            }
-        }
-    }
 }
\ No newline at end of file
diff --git a/tests/cases/unittests/session.ts b/tests/cases/unittests/session.ts
index 8e35baa3910..7c44b895ce0 100644
--- a/tests/cases/unittests/session.ts
+++ b/tests/cases/unittests/session.ts
@@ -16,8 +16,6 @@ namespace ts.server {
         getExecutingFilePath(): string { return void 0; },
         getCurrentDirectory(): string { return void 0; },
         readDirectory(): string[] { return []; },
-        readDirectoryNames(): string[] { return []; },
-        readFileNames(): string[] { return []; },
         exit(): void {}
     };
     const mockLogger: Logger = {

From 94a5327e9a5209af798415f0e18dce48ac074668 Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Wed, 16 Dec 2015 13:42:17 -0800
Subject: [PATCH 007/332] more tests

---
 src/compiler/commandLineParser.ts    |  44 ++-
 tests/cases/unittests/expandFiles.ts | 545 +++++++++++++++++++++------
 2 files changed, 454 insertions(+), 135 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index c81b3b63244..a5cd7abc505 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -531,7 +531,7 @@ namespace ts {
                 includeSpecs = ["**/*"];
             }
 
-            return expandFiles(fileNames, includeSpecs, excludeSpecs, basePath, options, host, errors);
+            return matchFileNames(fileNames, includeSpecs, excludeSpecs, basePath, options, host, errors);
         }
     }
 
@@ -589,14 +589,14 @@ namespace ts {
      * Expands an array of file specifications.
      *
      * @param fileNames The literal file names to include.
-     * @param includeSpecs The file specifications to expand.
-     * @param excludeSpecs The file specifications to exclude.
+     * @param include The wildcard file specifications to include.
+     * @param exclude The wildcard file specifications to exclude.
      * @param basePath The base path for any relative file specifications.
      * @param options Compiler options.
      * @param host The host used to resolve files and directories.
      * @param errors An array for diagnostic reporting.
      */
-    export function expandFiles(fileNames: string[], includeSpecs: string[], excludeSpecs: string[], basePath: string, options: CompilerOptions, host: ParseConfigHost, errors?: Diagnostic[]): ExpandResult {
+    function matchFileNames(fileNames: string[], include: string[], exclude: string[], basePath: string, options: CompilerOptions, host: ParseConfigHost, errors: Diagnostic[]): ExpandResult {
         basePath = normalizePath(basePath);
         basePath = removeTrailingDirectorySeparator(basePath);
 
@@ -615,11 +615,19 @@ namespace ts {
         // via wildcard, and to handle extension priority.
         const wildcardFileMap: Map<string> = {};
 
+        if (include) {
+            include = validateSpecs(include, errors, /*allowTrailingRecursion*/ false);
+        }
+
+        if (exclude) {
+            exclude = validateSpecs(exclude, errors, /*allowTrailingRecursion*/ true);
+        }
+
         // Wildcard directories (provided as part of a wildcard path) are stored in a
         // file map that marks whether it was a regular wildcard match (with a `*` or `?` token),
         // or a recursive directory. This information is used by filesystem watchers to monitor for
         // new entries in these paths.
-        const wildcardDirectories: Map<WatchDirectoryFlags> = getWildcardDirectories(includeSpecs, basePath, host.useCaseSensitiveFileNames);
+        const wildcardDirectories: Map<WatchDirectoryFlags> = getWildcardDirectories(include, exclude, basePath, host.useCaseSensitiveFileNames);
 
         // Rather than requery this for each file and filespec, we query the supported extensions
         // once and store it on the expansion context.
@@ -634,13 +642,8 @@ namespace ts {
             }
         }
 
-        if (includeSpecs) {
-            includeSpecs = validateSpecs(includeSpecs, errors, /*allowTrailingRecursion*/ false);
-            if (excludeSpecs) {
-                excludeSpecs = validateSpecs(excludeSpecs, errors, /*allowTrailingRecursion*/ true);
-            }
-
-            for (const file of host.readDirectory(basePath, supportedExtensions, excludeSpecs, includeSpecs)) {
+        if (include && include.length > 0) {
+            for (const file of host.readDirectory(basePath, supportedExtensions, exclude, include)) {
                 // If we have already included a literal or wildcard path with a
                 // higher priority extension, we should skip this file.
                 //
@@ -677,10 +680,10 @@ namespace ts {
         const validSpecs: string[] = [];
         for (const spec of specs) {
             if (!allowTrailingRecursion && invalidTrailingRecursionPattern.test(spec)) {
-                errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, spec));
+                errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
             }
             else if (invalidMultipleRecursionPatterns.test(spec)) {
-                errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, spec));
+                errors.push(createCompilerDiagnostic(Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, spec));
             }
             else {
                 validSpecs.push(spec);
@@ -696,7 +699,7 @@ namespace ts {
     /**
      * Gets directories in a set of include patterns that should be watched for changes.
      */
-    function getWildcardDirectories(includes: string[], path: string, useCaseSensitiveFileNames: boolean) {
+    function getWildcardDirectories(include: string[], exclude: string[], path: string, useCaseSensitiveFileNames: boolean) {
         // We watch a directory recursively if it contains a wildcard anywhere in a directory segment
         // of the pattern:
         //
@@ -708,11 +711,16 @@ namespace ts {
         //
         //  /a/b/*      - Watch /a/b directly to catch any new file
         //  /a/b/a?z    - Watch /a/b directly to catch any new file matching a?z
+        const excludeRegExp = getRegularExpressionForWildcard(exclude, path, "exclude", useCaseSensitiveFileNames);
         const wildcardDirectories: Map<WatchDirectoryFlags> = {};
-        if (includes !== undefined) {
+        if (include !== undefined) {
             const recursiveKeys: string[] = [];
-            for (const include of includes) {
-                const name = combinePaths(path, include);
+            for (const file of include) {
+                const name = combinePaths(path, file);
+                if (excludeRegExp && excludeRegExp.test(name)) {
+                    continue;
+                }
+
                 const match = wildcardDirectoryPattern.exec(name);
                 if (match) {
                     const key = useCaseSensitiveFileNames ? match[0] : match[0].toLowerCase();
diff --git a/tests/cases/unittests/expandFiles.ts b/tests/cases/unittests/expandFiles.ts
index 02065407e27..bbda14a2cfa 100644
--- a/tests/cases/unittests/expandFiles.ts
+++ b/tests/cases/unittests/expandFiles.ts
@@ -92,189 +92,376 @@ namespace ts {
     describe("expandFiles", () => {
         describe("with literal file list", () => {
             it("without exclusions", () => {
-                const fileNames = ["a.ts", "b.ts"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["c:/dev/a.ts", "c:/dev/b.ts"],
+                const json = {
+                    files: [
+                        "a.ts",
+                        "b.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/b.ts"
+                    ],
                     wildcardDirectories: {},
                 };
-                const actual = ts.expandFiles(fileNames, /*includeSpecs*/ undefined, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("missing files are still present", () => {
-                const fileNames = ["z.ts", "x.ts"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["c:/dev/z.ts", "c:/dev/x.ts"],
+                const json = {
+                    files: [
+                        "z.ts",
+                        "x.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/z.ts",
+                        "c:/dev/x.ts"
+                    ],
                     wildcardDirectories: {},
                 };
-                const actual = ts.expandFiles(fileNames, /*includeSpecs*/ undefined, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("are not removed due to excludes", () => {
-                const fileNames = ["a.ts", "b.ts"];
-                const excludeSpecs = ["b.ts"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["c:/dev/a.ts", "c:/dev/b.ts"],
+                const json = {
+                    files: [
+                        "a.ts",
+                        "b.ts"
+                    ],
+                    exclude: [
+                        "b.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/b.ts"
+                    ],
                     wildcardDirectories: {},
                 };
-                const actual = ts.expandFiles(fileNames, /*includeSpecs*/ undefined, excludeSpecs, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
         });
 
         describe("with literal include list", () => {
             it("without exclusions", () => {
-                const includeSpecs = ["a.ts", "b.ts"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["c:/dev/a.ts", "c:/dev/b.ts"],
+                const json = {
+                    include: [
+                        "a.ts",
+                        "b.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/b.ts"
+                    ],
                     wildcardDirectories: {},
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("with non .ts file extensions are excluded", () => {
-                const includeSpecs = ["a.js", "b.js"];
-                const expected: ts.ExpandResult = {
+                const json = {
+                    include: [
+                        "a.js",
+                        "b.js"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
                     fileNames: [],
                     wildcardDirectories: {},
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("with missing files are excluded", () => {
-                const includeSpecs = ["z.ts", "x.ts"];
-                const expected: ts.ExpandResult = {
+                const json = {
+                    include: [
+                        "z.ts",
+                        "x.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
                     fileNames: [],
                     wildcardDirectories: {},
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("with literal excludes", () => {
-                const includeSpecs = ["a.ts", "b.ts"];
-                const excludeSpecs = ["b.ts"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["c:/dev/a.ts"],
+                const json = {
+                    include: [
+                        "a.ts",
+                        "b.ts"
+                    ],
+                    exclude: [
+                        "b.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/a.ts"
+                    ],
                     wildcardDirectories: {},
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("with wildcard excludes", () => {
-                const includeSpecs = ["a.ts", "b.ts", "z/a.ts", "z/abz.ts", "z/aba.ts", "x/b.ts"];
-                const excludeSpecs = ["*.ts", "z/??z.ts", "*/b.ts"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["c:/dev/z/a.ts", "c:/dev/z/aba.ts"],
+                const json = {
+                    include: [
+                        "a.ts",
+                        "b.ts",
+                        "z/a.ts",
+                        "z/abz.ts",
+                        "z/aba.ts",
+                        "x/b.ts"
+                    ],
+                    exclude: [
+                        "*.ts",
+                        "z/??z.ts",
+                        "*/b.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/z/a.ts",
+                        "c:/dev/z/aba.ts"
+                    ],
                     wildcardDirectories: {},
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("with recursive excludes", () => {
-                const includeSpecs = ["a.ts", "b.ts", "x/a.ts", "x/b.ts", "x/y/a.ts", "x/y/b.ts"];
-                const excludeSpecs = ["**/b.ts"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["c:/dev/a.ts", "c:/dev/x/a.ts", "c:/dev/x/y/a.ts"],
+                const json = {
+                    include: [
+                        "a.ts",
+                        "b.ts",
+                        "x/a.ts",
+                        "x/b.ts",
+                        "x/y/a.ts",
+                        "x/y/b.ts"
+                    ],
+                    exclude: [
+                        "**/b.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/x/a.ts",
+                        "c:/dev/x/y/a.ts"
+                    ],
                     wildcardDirectories: {},
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("with case sensitive exclude", () => {
-                const includeSpecs = ["B.ts"];
-                const excludeSpecs = ["**/b.ts"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["/dev/B.ts"],
+                const json = {
+                    include: [
+                        "B.ts"
+                    ],
+                    exclude: [
+                        "**/b.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "/dev/B.ts"
+                    ],
                     wildcardDirectories: {},
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, caseSensitiveBasePath, {}, caseSensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseSensitiveHost, caseSensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
         });
 
         describe("with wildcard include list", () => {
             it("same named declarations are excluded", () => {
-                const includeSpecs = ["*.ts"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["c:/dev/a.ts", "c:/dev/b.ts", "c:/dev/c.d.ts"],
+                const json = {
+                    include: [
+                        "*.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/b.ts",
+                        "c:/dev/c.d.ts"
+                    ],
                     wildcardDirectories: {
                         "c:/dev": ts.WatchDirectoryFlags.None
                     },
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("`*` matches only ts files", () => {
-                const includeSpecs = ["*"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["c:/dev/a.ts", "c:/dev/b.ts", "c:/dev/c.d.ts"],
+                const json = {
+                    include: [
+                        "*"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/b.ts",
+                        "c:/dev/c.d.ts"
+                    ],
                     wildcardDirectories: {
                         "c:/dev": ts.WatchDirectoryFlags.None
                     },
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("`?` matches only a single character", () => {
-                const includeSpecs = ["x/?.ts"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["c:/dev/x/a.ts", "c:/dev/x/b.ts"],
+                const json = {
+                    include: [
+                        "x/?.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/x/a.ts",
+                        "c:/dev/x/b.ts"
+                    ],
                     wildcardDirectories: {
                         "c:/dev/x": ts.WatchDirectoryFlags.None
                     },
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("with recursive directory", () => {
-                const includeSpecs = ["**/a.ts"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["c:/dev/a.ts", "c:/dev/x/a.ts", "c:/dev/x/y/a.ts", "c:/dev/z/a.ts"],
+                const json = {
+                    include: [
+                        "**/a.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/x/a.ts",
+                        "c:/dev/x/y/a.ts",
+                        "c:/dev/z/a.ts"
+                    ],
                     wildcardDirectories: {
                         "c:/dev": ts.WatchDirectoryFlags.Recursive
                     },
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("case sensitive", () => {
-                const includeSpecs = ["**/A.ts"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["/dev/A.ts"],
+                const json = {
+                    include: [
+                        "**/A.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "/dev/A.ts"
+                    ],
                     wildcardDirectories: {
                         "/dev": ts.WatchDirectoryFlags.Recursive
                     },
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseSensitiveBasePath, {}, caseSensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseSensitiveHost, caseSensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("with missing files are excluded", () => {
-                const includeSpecs = ["*/z.ts"];
-                const expected: ts.ExpandResult = {
+                const json = {
+                    include: [
+                        "*/z.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
                     fileNames: [],
                     wildcardDirectories: {
                         "c:/dev": ts.WatchDirectoryFlags.Recursive
                     },
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("always include literal files", () => {
-                const fileNames = ["a.ts"];
-                const includeSpecs = ["*/z.ts"];
-                const excludeSpecs = ["**/a.ts"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["c:/dev/a.ts"],
+                const json = {
+                    files: [
+                        "a.ts"
+                    ],
+                    include: [
+                        "*/z.ts"
+                    ],
+                    exclude: [
+                        "**/a.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/a.ts"
+                    ],
                     wildcardDirectories: {
                         "c:/dev": ts.WatchDirectoryFlags.Recursive
                     },
                 };
-                const actual = ts.expandFiles(fileNames, includeSpecs, excludeSpecs, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("exclude folders", () => {
-                const includeSpecs = ["**/*"];
-                const excludeSpecs = ["z", "x"];
-                const expected: ts.ExpandResult = {
+                const json = {
+                    include: [
+                        "**/*"
+                    ],
+                    exclude: [
+                        "z",
+                        "x"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
                     fileNames: [
                         "c:/dev/a.ts",
                         "c:/dev/b.ts",
@@ -284,34 +471,66 @@ namespace ts {
                         "c:/dev": ts.WatchDirectoryFlags.Recursive
                     }
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, excludeSpecs, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("exclude .js files when allowJs=false", () => {
-                const includeSpecs = ["js/*"];
-                const expected: ts.ExpandResult = {
+                const json = {
+                    compilerOptions: {
+                        allowJs: false
+                    },
+                    include: [
+                        "js/*"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {
+                        allowJs: false
+                    },
+                    errors: [],
                     fileNames: [],
                     wildcardDirectories: {
                         "c:/dev/js": ts.WatchDirectoryFlags.None
                     }
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("include .js files when allowJs=true", () => {
-                const includeSpecs = ["js/*"];
-                const expected: ts.ExpandResult = {
-                    fileNames: ["c:/dev/js/a.js", "c:/dev/js/b.js"],
+                const json = {
+                    compilerOptions: {
+                        allowJs: true
+                    },
+                    include: [
+                        "js/*"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {
+                        allowJs: true
+                    },
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/js/a.js",
+                        "c:/dev/js/b.js"
+                    ],
                     wildcardDirectories: {
                         "c:/dev/js": ts.WatchDirectoryFlags.None
                     }
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, { allowJs: true }, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
             it("include paths outside of the project", () => {
-                const includeSpecs = ["*", "c:/ext/*"];
-                const expected: ts.ExpandResult = {
+                const json = {
+                    include: [
+                        "*",
+                        "c:/ext/*"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
                     fileNames: [
                         "c:/dev/a.ts",
                         "c:/dev/b.ts",
@@ -323,20 +542,20 @@ namespace ts {
                         "c:/ext": ts.WatchDirectoryFlags.None
                     }
                 };
-                const actual = ts.expandFiles(/*fileNames*/ undefined, includeSpecs, /*excludeSpecs*/ undefined, caseInsensitiveBasePath, {}, caseInsensitiveHost);
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
                 assert.deepEqual(actual, expected);
             });
-        });
-
-        describe("when called from parseJsonConfigFileContent", () => {
             it("with jsx=none, allowJs=false", () => {
-                const json: any = {
-                    "compilerOptions": {
-                        "jsx": "none",
-                        "allowJs": false
+                const json = {
+                    compilerOptions: {
+                        allowJs: false
                     }
                 };
-                const expected: ts.ExpandResult = {
+                const expected: ts.ParsedCommandLine = {
+                    options: {
+                        allowJs: false
+                    },
+                    errors: [],
                     fileNames: [
                         "c:/dev/a.ts",
                         "c:/dev/b.tsx",
@@ -347,17 +566,21 @@ namespace ts {
                     }
                 };
                 const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
-                assert.deepEqual(actual.fileNames, expected.fileNames);
-                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+                assert.deepEqual(actual, expected);
             });
             it("with jsx=preserve, allowJs=false", () => {
-                const json: any = {
-                    "compilerOptions": {
-                        "jsx": "preserve",
-                        "allowJs": false
+                const json = {
+                    compilerOptions: {
+                        jsx: "preserve",
+                        allowJs: false
                     }
                 };
-                const expected: ts.ExpandResult = {
+                const expected: ts.ParsedCommandLine = {
+                    options: {
+                        jsx: ts.JsxEmit.Preserve,
+                        allowJs: false
+                    },
+                    errors: [],
                     fileNames: [
                         "c:/dev/a.ts",
                         "c:/dev/b.tsx",
@@ -368,17 +591,19 @@ namespace ts {
                     }
                 };
                 const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
-                assert.deepEqual(actual.fileNames, expected.fileNames);
-                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+                assert.deepEqual(actual, expected);
             });
             it("with jsx=none, allowJs=true", () => {
-                const json: any = {
-                    "compilerOptions": {
-                        "jsx": "none",
-                        "allowJs": true
+                const json = {
+                    compilerOptions: {
+                        allowJs: true
                     }
                 };
-                const expected: ts.ExpandResult = {
+                const expected: ts.ParsedCommandLine = {
+                    options: {
+                        allowJs: true
+                    },
+                    errors: [],
                     fileNames: [
                         "c:/dev/a.ts",
                         "c:/dev/b.tsx",
@@ -391,17 +616,21 @@ namespace ts {
                     }
                 };
                 const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
-                assert.deepEqual(actual.fileNames, expected.fileNames);
-                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+                assert.deepEqual(actual, expected);
             });
             it("with jsx=preserve, allowJs=true", () => {
-                const json: any = {
-                    "compilerOptions": {
-                        "jsx": "preserve",
-                        "allowJs": true
+                const json = {
+                    compilerOptions: {
+                        jsx: "preserve",
+                        allowJs: true
                     }
                 };
-                const expected: ts.ExpandResult = {
+                const expected: ts.ParsedCommandLine = {
+                    options: {
+                        jsx: ts.JsxEmit.Preserve,
+                        allowJs: true
+                    },
+                    errors: [],
                     fileNames: [
                         "c:/dev/a.ts",
                         "c:/dev/b.tsx",
@@ -414,8 +643,90 @@ namespace ts {
                     }
                 };
                 const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveMixedExtensionHost, caseInsensitiveBasePath);
-                assert.deepEqual(actual.fileNames, expected.fileNames);
-                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+                assert.deepEqual(actual, expected);
+            });
+            describe("with trailing recursive directory", () => {
+                it("in includes", () => {
+                    const json = {
+                        include: [
+                            "**"
+                        ]
+                    };
+                    const expected: ts.ParsedCommandLine = {
+                        options: {},
+                        errors: [
+                            ts.createCompilerDiagnostic(ts.Diagnostics.File_specification_cannot_end_in_a_recursive_directory_wildcard_Asterisk_Asterisk_Colon_0, "**")
+                        ],
+                        fileNames: [],
+                        wildcardDirectories: {}
+                    };
+                    const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
+                    assert.deepEqual(actual, expected);
+                });
+                it("in excludes", () => {
+                    const json = {
+                        include: [
+                            "**/*"
+                        ],
+                        exclude: [
+                            "**"
+                        ]
+                    };
+                    const expected: ts.ParsedCommandLine = {
+                        options: {},
+                        errors: [],
+                        fileNames: [],
+                        wildcardDirectories: {}
+                    };
+                    const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
+                    assert.deepEqual(actual, expected);
+                });
+            });
+            describe("with multiple recursive directory patterns", () => {
+                it("in includes", () => {
+                    const json = {
+                        include: [
+                            "**/x/**/*"
+                        ]
+                    };
+                    const expected: ts.ParsedCommandLine = {
+                        options: {},
+                        errors: [
+                            ts.createCompilerDiagnostic(ts.Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, "**/x/**/*")
+                        ],
+                        fileNames: [],
+                        wildcardDirectories: {}
+                    };
+                    const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
+                    assert.deepEqual(actual, expected);
+                });
+                it("in excludes", () => {
+                    const json = {
+                        include: [
+                            "**/a.ts"
+                        ],
+                        exclude: [
+                            "**/x/**"
+                        ]
+                    };
+                    const expected: ts.ParsedCommandLine = {
+                        options: {},
+                        errors: [
+                            ts.createCompilerDiagnostic(ts.Diagnostics.File_specification_cannot_contain_multiple_recursive_directory_wildcards_Asterisk_Asterisk_Colon_0, "**/x/**")
+                        ],
+                        fileNames: [
+                            "c:/dev/a.ts",
+                            "c:/dev/x/a.ts",
+                            "c:/dev/x/y/a.ts",
+                            "c:/dev/z/a.ts"
+                        ],
+                        wildcardDirectories: {
+                            "c:/dev": ts.WatchDirectoryFlags.Recursive
+                        }
+                    };
+                    const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
+                    assert.deepEqual(actual, expected);
+                });
             });
         });
     });

From 6f85fe9ac467727bd33f607c95e7eaa6912ae57b Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Wed, 16 Dec 2015 15:18:25 -0800
Subject: [PATCH 008/332] Minor update to shims.ts for forthcoming VS support
 for globs.

---
 src/services/shims.ts | 14 +++-----------
 1 file changed, 3 insertions(+), 11 deletions(-)

diff --git a/src/services/shims.ts b/src/services/shims.ts
index cf6f3885a2c..46056eb110f 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -73,7 +73,7 @@ namespace ts {
          *  when enumerating the directory.
          */
         readDirectory(rootDir: string, extension: string, exclude?: string, include?: string): string;
-        useCaseSensitiveFileNames?: boolean;
+        useCaseSensitiveFileNames?(): boolean;
     }
 
     ///
@@ -411,15 +411,7 @@ namespace ts {
         public useCaseSensitiveFileNames: boolean;
 
         constructor(private shimHost: CoreServicesShimHost) {
-            if (typeof shimHost.useCaseSensitiveFileNames === "boolean") {
-                this.useCaseSensitiveFileNames = shimHost.useCaseSensitiveFileNames;
-            }
-            else if (sys) {
-                this.useCaseSensitiveFileNames = sys.useCaseSensitiveFileNames;
-            }
-            else {
-                this.useCaseSensitiveFileNames = true;
-            }
+            this.useCaseSensitiveFileNames = this.shimHost.useCaseSensitiveFileNames ? this.shimHost.useCaseSensitiveFileNames() : false;
         }
 
         public readDirectory(rootDir: string, extensions: string[], exclude: string[], include: string[]): string[] {
@@ -435,7 +427,7 @@ namespace ts {
                     JSON.stringify(include)));
             }
             catch (e) {
-                let results: string[] = [];
+                const results: string[] = [];
                 for (const extension of extensions) {
                     for (const file of this.readDirectoryFallback(rootDir, extension, exclude))
                     {

From d23df3430ee26f9a5a078c84f5aae229598156d0 Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Wed, 16 Dec 2015 15:49:31 -0800
Subject: [PATCH 009/332] Detailed comments for regular expressions and renamed
 some files.

---
 Jakefile.js                                   |  4 +-
 src/compiler/commandLineParser.ts             | 55 ++++++++++++++++++-
 src/harness/harness.ts                        |  2 +-
 src/harness/{vfs.ts => virtualFileSystem.ts}  |  0
 .../{expandFiles.ts => matchFiles.ts}         |  3 +-
 5 files changed, 57 insertions(+), 7 deletions(-)
 rename src/harness/{vfs.ts => virtualFileSystem.ts} (100%)
 rename tests/cases/unittests/{expandFiles.ts => matchFiles.ts} (97%)

diff --git a/Jakefile.js b/Jakefile.js
index cf7f69d41dc..d46c2437ccb 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -131,7 +131,7 @@ var languageServiceLibrarySources = [
 
 var harnessCoreSources = [
     "harness.ts",
-    "vfs.ts",
+    "virtualFileSystem.ts",
     "sourceMapRecorder.ts",
     "harnessLanguageService.ts",
     "fourslash.ts",
@@ -163,7 +163,7 @@ var harnessSources = harnessCoreSources.concat([
     "cachingInServerLSHost.ts",
     "moduleResolution.ts",
     "tsconfigParsing.ts",
-    "expandFiles.ts"
+    "matchFiles.ts"
 ].map(function (f) {
     return path.join(unittestsDirectory, f);
 })).concat([
diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index a5cd7abc505..6935cf28bcd 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -582,9 +582,61 @@ namespace ts {
         return { options, errors };
     }
 
+    /**
+     * Tests for a path that ends in a recursive directory wildcard.
+     * Matches **, /**, /**\/, and /**\/, but not a**b.
+     *
+     * NOTE: used \/ in place of / above to avoid ending the comment.
+     *
+     * Breakdown:
+     *  (^|\/)      # matches either the beginning of the string or a directory separator.
+     *  \*\*        # matches the recursive directory wildcard "**".
+     *  \/?$        # matches an optional trailing directory separator at the end of the string.
+     */
     const invalidTrailingRecursionPattern = /(^|\/)\*\*\/?$/;
+
+    /**
+     * Tests for a path with multiple recursive directory wildcards.
+     * Matches **\/** and **\/a/**, but not **\/a**b.
+     *
+     * NOTE: used \/ in place of / above to avoid ending the comment.
+     *
+     * Breakdown:
+     *  (^|\/)      # matches either the beginning of the string or a directory separator.
+     *  \*\*\/      # matches a recursive directory wildcard "**" followed by a directory separator.
+     *  (.*\/)?     # optionally matches any number of characters followed by a directory separator.
+     *  \*\*        # matches a recursive directory wildcard "**"
+     *  ($|\/)      # matches either the end of the string or a directory separator.
+     */
     const invalidMultipleRecursionPatterns = /(^|\/)\*\*\/(.*\/)?\*\*($|\/)/;
 
+    /**
+     * Tests for a path containing a wildcard character in a directory component of the path.
+     * Matches /*\/, /?/, and /a*b/, but not /a/ or /a/*.
+     *
+     * NOTE: used \/ in place of / above to avoid ending the comment.
+     *
+     * Breakdown:
+     *  \/          # matches a directory separator.
+     *  [^/]*?      # matches any number of characters excluding directory separators (non-greedy).
+     *  [*?]        # matches either a wildcard character (* or ?)
+     *  [^/]*       # matches any number of characters excluding directory separators (greedy).
+     *  \/          # matches a directory separator.
+     */
+    const watchRecursivePattern = /\/[^/]*?[*?][^/]*\//;
+
+    /**
+     * Matches the portion of a wildcard path that does not contain wildcards.
+     * Matches /a of /a/*, or /a/b/c of /a/b/c/?/d.
+     *
+     * Breakdown:
+     *  ^                   # matches the beginning of the string
+     *  [^*?]*              # matches any number of non-wildcard characters
+     *  (?=\/[^/]*[*?])     # lookahead that matches a directory separator followed by
+     *                      # a path component that contains at least one wildcard character (* or ?).
+     */
+    const wildcardDirectoryPattern = /^[^*?]*(?=\/[^/]*[*?])/;
+
     /**
      * Expands an array of file specifications.
      *
@@ -693,9 +745,6 @@ namespace ts {
         return validSpecs;
     }
 
-    const watchRecursivePattern = /\/[^/]*?[*?][^/]*\//;
-    const wildcardDirectoryPattern = /^[^*?]*(?=\/[^/]*[*?])/;
-
     /**
      * Gets directories in a set of include patterns that should be watched for changes.
      */
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index 509c193666f..f33cafc456d 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -23,7 +23,7 @@
 /// <reference path="external\chai.d.ts"/>
 /// <reference path="sourceMapRecorder.ts"/>
 /// <reference path="runnerbase.ts"/>
-/// <reference path="vfs.ts" />
+/// <reference path="virtualFileSystem.ts" />
 /* tslint:disable:no-null */
 
 // Block scoped definitions work poorly for global variables, temporarily enable var
diff --git a/src/harness/vfs.ts b/src/harness/virtualFileSystem.ts
similarity index 100%
rename from src/harness/vfs.ts
rename to src/harness/virtualFileSystem.ts
diff --git a/tests/cases/unittests/expandFiles.ts b/tests/cases/unittests/matchFiles.ts
similarity index 97%
rename from tests/cases/unittests/expandFiles.ts
rename to tests/cases/unittests/matchFiles.ts
index bbda14a2cfa..faccd31b88f 100644
--- a/tests/cases/unittests/expandFiles.ts
+++ b/tests/cases/unittests/matchFiles.ts
@@ -1,5 +1,6 @@
 /// <reference path="..\..\..\src\harness\external\mocha.d.ts" />
 /// <reference path="..\..\..\src\harness\harness.ts" />
+/// <reference path="..\..\..\src\harness\virtualFileSystem.ts" />
 
 namespace ts {
     class MockParseConfigHost extends Utils.VirtualFileSystem implements ParseConfigHost {
@@ -89,7 +90,7 @@ namespace ts {
         "c:/dev/f.other"
     ]);
 
-    describe("expandFiles", () => {
+    describe("matchFiles", () => {
         describe("with literal file list", () => {
             it("without exclusions", () => {
                 const json = {

From c2249177f58eb8221a9d4709f65cb900e207d15a Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Mon, 4 Jan 2016 11:37:25 -0800
Subject: [PATCH 010/332] Comment cleanup

---
 src/compiler/commandLineParser.ts | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 6935cf28bcd..48acf3055ad 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -584,9 +584,9 @@ namespace ts {
 
     /**
      * Tests for a path that ends in a recursive directory wildcard.
-     * Matches **, /**, /**\/, and /**\/, but not a**b.
+     * Matches **, \**, **\, and \**\, but not a**b.
      *
-     * NOTE: used \/ in place of / above to avoid ending the comment.
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
      *
      * Breakdown:
      *  (^|\/)      # matches either the beginning of the string or a directory separator.
@@ -597,9 +597,9 @@ namespace ts {
 
     /**
      * Tests for a path with multiple recursive directory wildcards.
-     * Matches **\/** and **\/a/**, but not **\/a**b.
+     * Matches **\** and **\a\**, but not **\a**b.
      *
-     * NOTE: used \/ in place of / above to avoid ending the comment.
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
      *
      * Breakdown:
      *  (^|\/)      # matches either the beginning of the string or a directory separator.
@@ -612,9 +612,9 @@ namespace ts {
 
     /**
      * Tests for a path containing a wildcard character in a directory component of the path.
-     * Matches /*\/, /?/, and /a*b/, but not /a/ or /a/*.
+     * Matches \*\, \?\, and \a*b\, but not \a\ or \a\*.
      *
-     * NOTE: used \/ in place of / above to avoid ending the comment.
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
      *
      * Breakdown:
      *  \/          # matches a directory separator.
@@ -627,7 +627,9 @@ namespace ts {
 
     /**
      * Matches the portion of a wildcard path that does not contain wildcards.
-     * Matches /a of /a/*, or /a/b/c of /a/b/c/?/d.
+     * Matches \a of \a\*, or \a\b\c of \a\b\c\?\d.
+     *
+     * NOTE: used \ in place of / above to avoid issues with multiline comments.
      *
      * Breakdown:
      *  ^                   # matches the beginning of the string

From c1205ebdfbfebc94b35abab251237bdfbff213c5 Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Tue, 5 Jan 2016 10:11:44 -0800
Subject: [PATCH 011/332] Fixed new linter warnings

---
 src/compiler/commandLineParser.ts |  4 ++--
 src/compiler/core.ts              | 10 +++++-----
 src/compiler/sys.ts               | 10 +---------
 src/harness/projectsRunner.ts     |  4 ----
 4 files changed, 8 insertions(+), 20 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 759b443e742..52f9ef05f37 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -816,7 +816,7 @@ namespace ts {
     function hasFileWithHigherPriorityExtension(file: string, literalFiles: Map<string>, wildcardFiles: Map<string>, extensions: string[], keyMapper: (value: string) => string) {
         const extensionPriority = getExtensionPriority(file, extensions);
         const adjustedExtensionPriority = adjustExtensionPriority(extensionPriority);
-        for (let i = ExtensionPriority.Highest; i < adjustedExtensionPriority; ++i) {
+        for (let i = ExtensionPriority.Highest; i < adjustedExtensionPriority; i++) {
             const higherPriorityExtension = extensions[i];
             const higherPriorityPath = keyMapper(changeExtension(file, higherPriorityExtension));
             if (hasProperty(literalFiles, higherPriorityPath) || hasProperty(wildcardFiles, higherPriorityPath)) {
@@ -838,7 +838,7 @@ namespace ts {
     function removeWildcardFilesWithLowerPriorityExtension(file: string, wildcardFiles: Map<string>, extensions: string[], keyMapper: (value: string) => string) {
         const extensionPriority = getExtensionPriority(file, extensions);
         const nextExtensionPriority = getNextLowestExtensionPriority(extensionPriority);
-        for (let i = nextExtensionPriority; i < extensions.length; ++i) {
+        for (let i = nextExtensionPriority; i < extensions.length; i++) {
             const lowerPriorityExtension = extensions[i];
             const lowerPriorityPath = keyMapper(changeExtension(file, lowerPriorityExtension));
             delete wildcardFiles[lowerPriorityPath];
diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index 137a603407a..d0f27a2046f 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -116,7 +116,7 @@ namespace ts {
     }
 
     export function indexOfAnyCharCode(text: string, charCodes: number[], start?: number): number {
-        for (let i = start || 0, len = text.length; i < len; ++i) {
+        for (let i = start || 0, len = text.length; i < len; i++) {
             if (contains(charCodes, text.charCodeAt(i))) {
                 return i;
             }
@@ -824,7 +824,7 @@ namespace ts {
         const aComponents = getNormalizedPathComponents(a, currentDirectory);
         const bComponents = getNormalizedPathComponents(b, currentDirectory);
         const sharedLength = Math.min(aComponents.length, bComponents.length);
-        for (let i = 0; i < sharedLength; ++i) {
+        for (let i = 0; i < sharedLength; i++) {
             const result = compareStrings(aComponents[i], bComponents[i], ignoreCase);
             if (result !== Comparison.EqualTo) {
                 return result;
@@ -846,7 +846,7 @@ namespace ts {
             return false;
         }
 
-        for (let i = 0; i < parentComponents.length; ++i) {
+        for (let i = 0; i < parentComponents.length; i++) {
             const result = compareStrings(parentComponents[i], childComponents[i], ignoreCase);
             if (result !== Comparison.EqualTo) {
                 return false;
@@ -1021,9 +1021,9 @@ namespace ts {
 
             // Iterate over each include base path and include unique base paths that are not a
             // subpath of an existing base path
-            include: for (let i = 0; i < includeBasePaths.length; ++i) {
+            include: for (let i = 0; i < includeBasePaths.length; i++) {
                 const includeBasePath = includeBasePaths[i];
-                for (let j = 0; j < basePaths.length; ++j) {
+                for (let j = 0; j < basePaths.length; j++) {
                     if (containsPath(basePaths[j], includeBasePath, path, !useCaseSensitiveFileNames)) {
                         continue include;
                     }
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 9b97c99eaa3..2c23e4016eb 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -139,10 +139,6 @@ namespace ts {
                 }
             }
 
-            function getCanonicalPath(path: string): string {
-                return path.toLowerCase();
-            }
-
             function getNames(collection: any): string[] {
                 const result: string[] = [];
                 for (let e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
@@ -357,10 +353,6 @@ namespace ts {
                 }
             }
 
-            function getCanonicalPath(path: string): string {
-                return useCaseSensitiveFileNames ? path.toLowerCase() : path;
-            }
-
             function getAccessibleFileSystemEntries(path: string): FileSystemEntries {
                 try {
                     const entries = _fs.readdirSync(path || ".").sort();
@@ -501,4 +493,4 @@ namespace ts {
             return undefined; // Unsupported host
         }
     })();
-}
+}
diff --git a/src/harness/projectsRunner.ts b/src/harness/projectsRunner.ts
index bcb91fbbfda..769e72d3851 100644
--- a/src/harness/projectsRunner.ts
+++ b/src/harness/projectsRunner.ts
@@ -287,10 +287,6 @@ class ProjectRunner extends RunnerBase {
                 return Harness.IO.fileExists(getFileNameInTheProjectTest(fileName));
             }
 
-            function directoryExists(directoryName: string): boolean {
-                return Harness.IO.directoryExists(getFileNameInTheProjectTest(directoryName));
-            }
-
             function getSourceFileText(fileName: string): string {
                 let text: string = undefined;
                 try {

From 4d3cff1e5a6f34e967bcda1ee1cf002295b8f9e3 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Fri, 11 Mar 2016 15:56:36 -0800
Subject: [PATCH 012/332] Add upper limit for the program size, fix
 readDirectory for the symlink files

---
 src/compiler/commandLineParser.ts    |  2 +-
 src/compiler/diagnosticMessages.json |  4 ++++
 src/compiler/program.ts              | 16 ++++++++++++-
 src/compiler/sys.ts                  | 12 +++++-----
 src/compiler/utilities.ts            |  6 +++++
 src/server/editorServices.ts         | 36 ++++++++++++++++++++++++----
 6 files changed, 63 insertions(+), 13 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index cf55f030c33..a11d06a6445 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -566,7 +566,7 @@ namespace ts {
                 }
                 else {
                     // by default exclude node_modules, and any specificied output directory
-                    exclude = ["node_modules"];
+                    exclude = ["node_modules", "bower_components"];
                     const outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
                     if (outDir) {
                         exclude.push(outDir);
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 15a3a4e5ef4..b5208e3aad4 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -2824,5 +2824,9 @@
     "Unknown typing option '{0}'.": {
         "category": "Error",
         "code": 17010
+    },
+    "Too many javascript files in the project. Consider add to the `exclude` list in the config file.": {
+        "category": "Error",
+        "code": 17012
     }
 }
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 495fbde5a99..406eeb6cd91 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -748,7 +748,21 @@ namespace ts {
         }
 
         if (!tryReuseStructureFromOldProgram()) {
-            forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false));
+            let programSize = 0;
+            for (const name of rootNames) {
+                const path = toPath(name, currentDirectory, getCanonicalFileName);
+                if (programSize <= maxProgramSize) {
+                    processRootFile(name, /*isDefaultLib*/ false);
+                    if (!hasTypeScriptFileExtension(name) && filesByName.get(path)) {
+                        programSize += filesByName.get(path).text.length;
+                    }
+                }
+                else {
+                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Too_many_javascript_files_in_the_project_Consider_add_to_the_exclude_list_in_the_config_file));
+                    break;
+                }
+            }
+
             // Do not process the default library if:
             //  - The '--noLib' flag is used.
             //  - A 'no-default-lib' reference comment is encountered in
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 4cf94655b35..6d7847ab588 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -74,7 +74,7 @@ namespace ts {
         watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
     };
 
-    export var sys: System = (function () {
+    export var sys: System = (function() {
 
         function getWScriptSystem(): System {
 
@@ -404,8 +404,8 @@ namespace ts {
             const watchedFileSet = createWatchedFileSet();
 
             function isNode4OrLater(): boolean {
-                 return parseInt(process.version.charAt(1)) >= 4;
-             }
+                return parseInt(process.version.charAt(1)) >= 4;
+            }
 
             const platform: string = _os.platform();
             // win32\win64 are case insensitive platforms, MacOS (darwin) by default is also case insensitive
@@ -500,7 +500,7 @@ namespace ts {
                     for (const current of files) {
                         const name = combinePaths(path, current);
                         if (!contains(exclude, getCanonicalPath(name))) {
-                            const stat = _fs.statSync(name);
+                            const stat = _fs.lstatSync(name);
                             if (stat.isFile()) {
                                 if (!extension || fileExtensionIs(name, extension)) {
                                     result.push(name);
@@ -532,7 +532,7 @@ namespace ts {
                     // and https://github.com/Microsoft/TypeScript/issues/4643), therefore
                     // if the current node.js version is newer than 4, use `fs.watch` instead.
                     const watchSet = isNode4OrLater() ? watchedFileSet : pollingWatchedFileSet;
-                    const watchedFile =  watchSet.addFile(filePath, callback);
+                    const watchedFile = watchSet.addFile(filePath, callback);
                     return {
                         close: () => watchSet.removeFile(watchedFile)
                     };
@@ -562,7 +562,7 @@ namespace ts {
                         }
                     );
                 },
-                resolvePath: function (path: string): string {
+                resolvePath: function(path: string): string {
                     return _path.resolve(path);
                 },
                 fileExists,
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index de10d469c87..72ad016f596 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -2484,6 +2484,10 @@ namespace ts {
         return forEach(supportedJavascriptExtensions, extension => fileExtensionIs(fileName, extension));
     }
 
+    export function hasTypeScriptFileExtension(fileName: string) {
+        return forEach(supportedTypeScriptExtensions, extension => fileExtensionIs(fileName, extension));
+    }
+
     /**
      * Replace each instance of non-ascii characters by one, two, three, or four escape sequences
      * representing the UTF-8 encoding of the character, and return the expanded char code list.
@@ -2866,4 +2870,6 @@ namespace ts {
     export function isParameterPropertyDeclaration(node: ParameterDeclaration): boolean {
         return node.flags & NodeFlags.AccessibilityModifier && node.parent.kind === SyntaxKind.Constructor && isClassLike(node.parent.parent);
     }
+
+    export const maxProgramSize = 35 * 1024 * 1024;
 }
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 71907735b91..26b40b3d908 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -1217,13 +1217,35 @@ namespace ts.server {
             }
             else {
                 const project = this.createProject(configFilename, projectOptions);
+                let programSize = 0;
+
+                // As the project openning might not be complete if there are too many files,
+                // therefore to surface the diagnostics we need to make sure the given client file is opened.
+                if (clientFileName) {
+                    const currentClientFileInfo = this.openFile(clientFileName, /*openedByClient*/ true);
+                    project.addRoot(currentClientFileInfo);
+                    programSize += currentClientFileInfo.content.length;
+                }
+
                 for (const rootFilename of projectOptions.files) {
-                    if (this.host.fileExists(rootFilename)) {
-                        const info = this.openFile(rootFilename, /*openedByClient*/ clientFileName == rootFilename);
-                        project.addRoot(info);
+                    if (rootFilename === clientFileName) {
+                        continue;
+                    }
+
+                    if (programSize <= maxProgramSize) {
+                        if (this.host.fileExists(rootFilename)) {
+                            const info = this.openFile(rootFilename, /*openedByClient*/ false);
+                            project.addRoot(info);
+                            if (!hasTypeScriptFileExtension(rootFilename)) {
+                                programSize += info.content.length;
+                            }
+                        }
+                        else {
+                            return { errorMsg: "specified file " + rootFilename + " not found" };
+                        }
                     }
                     else {
-                        return { errorMsg: "specified file " + rootFilename + " not found" };
+                        break;
                     }
                 }
                 project.finishGraph();
@@ -1251,11 +1273,15 @@ namespace ts.server {
                     return error;
                 }
                 else {
-                    const oldFileNames = project.compilerService.host.roots.map(info => info.fileName);
+                    const oldFileNames = project.projectOptions ? project.projectOptions.files : project.compilerService.host.roots.map(info => info.fileName);
                     const newFileNames = projectOptions.files;
                     const fileNamesToRemove = oldFileNames.filter(f => newFileNames.indexOf(f) < 0);
                     const fileNamesToAdd = newFileNames.filter(f => oldFileNames.indexOf(f) < 0);
 
+                    if (fileNamesToAdd.length === 0 && fileNamesToRemove.length === 0) {
+                        return;
+                    }
+
                     for (const fileName of fileNamesToRemove) {
                         const info = this.getScriptInfo(fileName);
                         if (info) {

From b155fa847a6dd9d069bf6cb2e8e7dcebb16cda08 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Fri, 11 Mar 2016 16:18:40 -0800
Subject: [PATCH 013/332] Add comments

---
 src/compiler/sys.ts          | 3 +++
 src/server/editorServices.ts | 7 +++----
 2 files changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 6d7847ab588..c70985cd018 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -500,6 +500,9 @@ namespace ts {
                     for (const current of files) {
                         const name = combinePaths(path, current);
                         if (!contains(exclude, getCanonicalPath(name))) {
+                            // fs.statSync would throw an exception if the file is a symlink
+                            // whose linked file doesn't exist. fs.lstatSync would return a stat
+                            // object for the symlink file itself in this case
                             const stat = _fs.lstatSync(name);
                             if (stat.isFile()) {
                                 if (!extension || fileExtensionIs(name, extension)) {
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 26b40b3d908..4b49c2944cd 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -1273,15 +1273,14 @@ namespace ts.server {
                     return error;
                 }
                 else {
+                    // if the project is too large, the root files might not have been all loaded if the total
+                    // program size reached the upper limit. In that case project.projectOptions.files should 
+                    // be more precise. However this would only happen for configured project.
                     const oldFileNames = project.projectOptions ? project.projectOptions.files : project.compilerService.host.roots.map(info => info.fileName);
                     const newFileNames = projectOptions.files;
                     const fileNamesToRemove = oldFileNames.filter(f => newFileNames.indexOf(f) < 0);
                     const fileNamesToAdd = newFileNames.filter(f => oldFileNames.indexOf(f) < 0);
 
-                    if (fileNamesToAdd.length === 0 && fileNamesToRemove.length === 0) {
-                        return;
-                    }
-
                     for (const fileName of fileNamesToRemove) {
                         const info = this.getScriptInfo(fileName);
                         if (info) {

From a3aa0002a3a88b3225ef97f0ff4aacf748b53827 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Mon, 14 Mar 2016 14:51:24 -0700
Subject: [PATCH 014/332] CR feedback / Change upper limit / Add
 disableSizeLimit compiler option

---
 src/compiler/commandLineParser.ts    |  5 ++++
 src/compiler/diagnosticMessages.json |  7 +++--
 src/compiler/program.ts              | 38 +++++++++++++++++++---------
 src/compiler/sys.ts                  | 20 ++++++++-------
 src/compiler/types.ts                |  1 +
 src/compiler/utilities.ts            |  2 +-
 src/server/editorServices.ts         | 23 ++++++++++++-----
 7 files changed, 65 insertions(+), 31 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index a11d06a6445..72deb16f0c1 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -332,6 +332,11 @@ namespace ts {
             name: "noImplicitUseStrict",
             type: "boolean",
             description: Diagnostics.Do_not_emit_use_strict_directives_in_module_output
+        },
+        {
+            name: "disableSizeLimit",
+            type: "boolean",
+            description: Diagnostics.Disable_the_upper_limit_for_the_total_file_size_of_a_project
         }
     ];
 
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index b5208e3aad4..d96b10f61ad 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -2620,7 +2620,10 @@
         "category": "Message",
         "code": 6112
     },
-
+    "Disable the upper limit for the total file size of a project.": {
+        "category": "Message",
+        "code": 6113
+    },
     "Variable '{0}' implicitly has an '{1}' type.": {
         "category": "Error",
         "code": 7005
@@ -2825,7 +2828,7 @@
         "category": "Error",
         "code": 17010
     },
-    "Too many javascript files in the project. Consider add to the `exclude` list in the config file.": {
+    "Too many JavaScript files in the project. Use an exact 'files' list, or use the 'exclude' setting in project configuration to limit included source folders. The likely folder to exclude is '{0}'. To disable the project size limit, set the 'disableSizeLimit' compiler option to 'true'": {
         "category": "Error",
         "code": 17012
     }
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 406eeb6cd91..cdb4d3b417c 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -742,24 +742,38 @@ namespace ts {
                 (oldOptions.target !== options.target) ||
                 (oldOptions.noLib !== options.noLib) ||
                 (oldOptions.jsx !== options.jsx) ||
-                (oldOptions.allowJs !== options.allowJs)) {
+                (oldOptions.allowJs !== options.allowJs) ||
+                (oldOptions.disableSizeLimit !== options.disableSizeLimit)) {
                 oldProgram = undefined;
             }
         }
 
         if (!tryReuseStructureFromOldProgram()) {
-            let programSize = 0;
-            for (const name of rootNames) {
-                const path = toPath(name, currentDirectory, getCanonicalFileName);
-                if (programSize <= maxProgramSize) {
-                    processRootFile(name, /*isDefaultLib*/ false);
-                    if (!hasTypeScriptFileExtension(name) && filesByName.get(path)) {
-                        programSize += filesByName.get(path).text.length;
+            if (options.disableSizeLimit === true) {
+                forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false));
+            }
+            else {
+                let programSize = 0;
+                for (const name of rootNames) {
+                    const path = toPath(name, currentDirectory, getCanonicalFileName);
+                    if (programSize <= maxProgramSize) {
+                        processRootFile(name, /*isDefaultLib*/ false);
+                        const file = filesByName.get(path);
+                        if (!hasTypeScriptFileExtension(name) && file && file.text) {
+                            programSize += file.text.length;
+                        }
+                    }
+                    else {
+                        // If the program size limit was reached when processing a file, this file is
+                        // likely in the problematic folder than contains too many files
+                        const commonSourceDirectory = getCommonSourceDirectory();
+                        let rootLevelDirectory = path.substring(0, Math.max(commonSourceDirectory.length, path.indexOf(directorySeparator, commonSourceDirectory.length)));
+                        if (rootLevelDirectory[rootLevelDirectory.length - 1] !== directorySeparator) {
+                            rootLevelDirectory += directorySeparator;
+                        }
+                        programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Too_many_JavaScript_files_in_the_project_Use_an_exact_files_list_or_use_the_exclude_setting_in_project_configuration_to_limit_included_source_folders_The_likely_folder_to_exclude_is_0_To_disable_the_project_size_limit_set_the_disableSizeLimit_compiler_option_to_true, rootLevelDirectory));
+                        break;
                     }
-                }
-                else {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Too_many_javascript_files_in_the_project_Consider_add_to_the_exclude_list_in_the_config_file));
-                    break;
                 }
             }
 
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index c70985cd018..1c7164aeb01 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -501,17 +501,19 @@ namespace ts {
                         const name = combinePaths(path, current);
                         if (!contains(exclude, getCanonicalPath(name))) {
                             // fs.statSync would throw an exception if the file is a symlink
-                            // whose linked file doesn't exist. fs.lstatSync would return a stat
-                            // object for the symlink file itself in this case
-                            const stat = _fs.lstatSync(name);
-                            if (stat.isFile()) {
-                                if (!extension || fileExtensionIs(name, extension)) {
-                                    result.push(name);
+                            // whose linked file doesn't exist.
+                            try {
+                                const stat = _fs.statSync(name);
+                                if (stat.isFile()) {
+                                    if (!extension || fileExtensionIs(name, extension)) {
+                                        result.push(name);
+                                    }
+                                }
+                                else if (stat.isDirectory()) {
+                                    directories.push(name);
                                 }
                             }
-                            else if (stat.isDirectory()) {
-                                directories.push(name);
-                            }
+                            catch (e) { }
                         }
                     }
                     for (const current of directories) {
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 155f5c1a77f..73dc959e163 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2437,6 +2437,7 @@ namespace ts {
         allowSyntheticDefaultImports?: boolean;
         allowJs?: boolean;
         noImplicitUseStrict?: boolean;
+        disableSizeLimit?: boolean;
         /* @internal */ stripInternal?: boolean;
 
         // Skip checking lib.d.ts to help speed up tests.
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 72ad016f596..9073e481729 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -2871,5 +2871,5 @@ namespace ts {
         return node.flags & NodeFlags.AccessibilityModifier && node.parent.kind === SyntaxKind.Constructor && isClassLike(node.parent.parent);
     }
 
-    export const maxProgramSize = 35 * 1024 * 1024;
+    export const maxProgramSize = 20 * 1024 * 1024;
 }
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 4b49c2944cd..9cbb038f04e 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -1222,9 +1222,14 @@ namespace ts.server {
                 // As the project openning might not be complete if there are too many files,
                 // therefore to surface the diagnostics we need to make sure the given client file is opened.
                 if (clientFileName) {
-                    const currentClientFileInfo = this.openFile(clientFileName, /*openedByClient*/ true);
-                    project.addRoot(currentClientFileInfo);
-                    programSize += currentClientFileInfo.content.length;
+                    if (this.host.fileExists(clientFileName)) {
+                        const currentClientFileInfo = this.openFile(clientFileName, /*openedByClient*/ true);
+                        project.addRoot(currentClientFileInfo);
+                        programSize += currentClientFileInfo.content.length;
+                    }
+                    else {
+                        return { errorMsg: "specified file " + clientFileName + " not found" };
+                    }
                 }
 
                 for (const rootFilename of projectOptions.files) {
@@ -1232,8 +1237,12 @@ namespace ts.server {
                         continue;
                     }
 
-                    if (programSize <= maxProgramSize) {
-                        if (this.host.fileExists(rootFilename)) {
+                    if (this.host.fileExists(rootFilename)) {
+                        if (projectOptions.compilerOptions.disableSizeLimit === true) {
+                            const info = this.openFile(rootFilename, /*openedByClient*/ false);
+                            project.addRoot(info);
+                        }
+                        else if (programSize <= maxProgramSize) {
                             const info = this.openFile(rootFilename, /*openedByClient*/ false);
                             project.addRoot(info);
                             if (!hasTypeScriptFileExtension(rootFilename)) {
@@ -1241,11 +1250,11 @@ namespace ts.server {
                             }
                         }
                         else {
-                            return { errorMsg: "specified file " + rootFilename + " not found" };
+                            break;
                         }
                     }
                     else {
-                        break;
+                        return { errorMsg: "specified file " + rootFilename + " not found" };
                     }
                 }
                 project.finishGraph();

From a6a466c752298446ccde7894cf62a4365d6eee25 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Mon, 14 Mar 2016 20:14:17 -0700
Subject: [PATCH 015/332] online and offline CR feedback

---
 src/compiler/commandLineParser.ts    |  3 +-
 src/compiler/diagnosticMessages.json |  6 +--
 src/compiler/program.ts              | 55 ++++++++++++++--------------
 src/compiler/utilities.ts            |  2 +-
 src/server/editorServices.ts         | 10 ++---
 src/services/services.ts             |  3 +-
 6 files changed, 37 insertions(+), 42 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 72deb16f0c1..3b7f423bf86 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -335,8 +335,7 @@ namespace ts {
         },
         {
             name: "disableSizeLimit",
-            type: "boolean",
-            description: Diagnostics.Disable_the_upper_limit_for_the_total_file_size_of_a_project
+            type: "boolean"
         }
     ];
 
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index d96b10f61ad..f8a7b627a7c 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -2620,10 +2620,6 @@
         "category": "Message",
         "code": 6112
     },
-    "Disable the upper limit for the total file size of a project.": {
-        "category": "Message",
-        "code": 6113
-    },
     "Variable '{0}' implicitly has an '{1}' type.": {
         "category": "Error",
         "code": 7005
@@ -2828,7 +2824,7 @@
         "category": "Error",
         "code": 17010
     },
-    "Too many JavaScript files in the project. Use an exact 'files' list, or use the 'exclude' setting in project configuration to limit included source folders. The likely folder to exclude is '{0}'. To disable the project size limit, set the 'disableSizeLimit' compiler option to 'true'": {
+    "Too many JavaScript files in the project. Consider specifying the 'exclude' setting in project configuration to limit included source folders. The likely folder to exclude is '{0}'. To disable the project size limit, set the 'disableSizeLimit' compiler option to 'true'.": {
         "category": "Error",
         "code": 17012
     }
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index cdb4d3b417c..8f2f95fa4fe 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -696,6 +696,7 @@ namespace ts {
         let diagnosticsProducingTypeChecker: TypeChecker;
         let noDiagnosticsTypeChecker: TypeChecker;
         let classifiableNames: Map<string>;
+        let programSizeForNonTsFiles = 0;
 
         let skipDefaultLib = options.noLib;
         const supportedExtensions = getSupportedExtensions(options);
@@ -749,34 +750,7 @@ namespace ts {
         }
 
         if (!tryReuseStructureFromOldProgram()) {
-            if (options.disableSizeLimit === true) {
-                forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false));
-            }
-            else {
-                let programSize = 0;
-                for (const name of rootNames) {
-                    const path = toPath(name, currentDirectory, getCanonicalFileName);
-                    if (programSize <= maxProgramSize) {
-                        processRootFile(name, /*isDefaultLib*/ false);
-                        const file = filesByName.get(path);
-                        if (!hasTypeScriptFileExtension(name) && file && file.text) {
-                            programSize += file.text.length;
-                        }
-                    }
-                    else {
-                        // If the program size limit was reached when processing a file, this file is
-                        // likely in the problematic folder than contains too many files
-                        const commonSourceDirectory = getCommonSourceDirectory();
-                        let rootLevelDirectory = path.substring(0, Math.max(commonSourceDirectory.length, path.indexOf(directorySeparator, commonSourceDirectory.length)));
-                        if (rootLevelDirectory[rootLevelDirectory.length - 1] !== directorySeparator) {
-                            rootLevelDirectory += directorySeparator;
-                        }
-                        programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Too_many_JavaScript_files_in_the_project_Use_an_exact_files_list_or_use_the_exclude_setting_in_project_configuration_to_limit_included_source_folders_The_likely_folder_to_exclude_is_0_To_disable_the_project_size_limit_set_the_disableSizeLimit_compiler_option_to_true, rootLevelDirectory));
-                        break;
-                    }
-                }
-            }
-
+            forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false));
             // Do not process the default library if:
             //  - The '--noLib' flag is used.
             //  - A 'no-default-lib' reference comment is encountered in
@@ -1480,6 +1454,27 @@ namespace ts {
                 return file;
             }
 
+            if (!options.disableSizeLimit) {
+                if (programSizeForNonTsFiles === -1) {
+                    return;
+                }
+                if (programSizeForNonTsFiles > maxProgramSizeForNonTsFiles) {
+                    // If the program size limit was reached when processing a file, this file is
+                    // likely in the problematic folder than contains too many files.
+                    // Normally the folder is one level down from the commonSourceDirectory, for example,
+                    // if the commonSourceDirectory is "/src/", and the last processed path was "/src/node_modules/a/b.js",
+                    // we should show in the error message "/src/node_modules/".
+                    const commonSourceDirectory = getCommonSourceDirectory();
+                    let rootLevelDirectory = path.substring(0, Math.max(commonSourceDirectory.length, path.indexOf(directorySeparator, commonSourceDirectory.length)));
+                    if (rootLevelDirectory[rootLevelDirectory.length - 1] !== directorySeparator) {
+                        rootLevelDirectory += directorySeparator;
+                    }
+                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Too_many_JavaScript_files_in_the_project_Consider_specifying_the_exclude_setting_in_project_configuration_to_limit_included_source_folders_The_likely_folder_to_exclude_is_0_To_disable_the_project_size_limit_set_the_disableSizeLimit_compiler_option_to_true, rootLevelDirectory));
+                    programSizeForNonTsFiles = -1;
+                    return;
+                }
+            }
+
             // We haven't looked for this file, do so now and cache result
             const file = host.getSourceFile(fileName, options.target, hostErrorMessage => {
                 if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
@@ -1491,6 +1486,10 @@ namespace ts {
                 }
             });
 
+            if (!options.disableSizeLimit && file && file.text && !hasTypeScriptFileExtension(file.fileName)) {
+                programSizeForNonTsFiles += file.text.length;
+            }
+
             filesByName.set(path, file);
             if (file) {
                 file.wasReferenced = file.wasReferenced || isReference;
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 9073e481729..7974fb66cd6 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -2871,5 +2871,5 @@ namespace ts {
         return node.flags & NodeFlags.AccessibilityModifier && node.parent.kind === SyntaxKind.Constructor && isClassLike(node.parent.parent);
     }
 
-    export const maxProgramSize = 20 * 1024 * 1024;
+    export const maxProgramSizeForNonTsFiles = 20 * 1024 * 1024;
 }
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 9cbb038f04e..456ff0ed26a 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -1217,7 +1217,7 @@ namespace ts.server {
             }
             else {
                 const project = this.createProject(configFilename, projectOptions);
-                let programSize = 0;
+                let programSizeForNonTsFiles = 0;
 
                 // As the project openning might not be complete if there are too many files,
                 // therefore to surface the diagnostics we need to make sure the given client file is opened.
@@ -1225,7 +1225,7 @@ namespace ts.server {
                     if (this.host.fileExists(clientFileName)) {
                         const currentClientFileInfo = this.openFile(clientFileName, /*openedByClient*/ true);
                         project.addRoot(currentClientFileInfo);
-                        programSize += currentClientFileInfo.content.length;
+                        programSizeForNonTsFiles += currentClientFileInfo.content.length;
                     }
                     else {
                         return { errorMsg: "specified file " + clientFileName + " not found" };
@@ -1238,15 +1238,15 @@ namespace ts.server {
                     }
 
                     if (this.host.fileExists(rootFilename)) {
-                        if (projectOptions.compilerOptions.disableSizeLimit === true) {
+                        if (projectOptions.compilerOptions.disableSizeLimit) {
                             const info = this.openFile(rootFilename, /*openedByClient*/ false);
                             project.addRoot(info);
                         }
-                        else if (programSize <= maxProgramSize) {
+                        else if (programSizeForNonTsFiles <= maxProgramSizeForNonTsFiles) {
                             const info = this.openFile(rootFilename, /*openedByClient*/ false);
                             project.addRoot(info);
                             if (!hasTypeScriptFileExtension(rootFilename)) {
-                                programSize += info.content.length;
+                                programSizeForNonTsFiles += info.content.length;
                             }
                         }
                         else {
diff --git a/src/services/services.ts b/src/services/services.ts
index a562ecf18cf..e72c647db1b 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -2760,7 +2760,8 @@ namespace ts {
                  oldSettings.module !== newSettings.module ||
                  oldSettings.noResolve !== newSettings.noResolve ||
                  oldSettings.jsx !== newSettings.jsx ||
-                 oldSettings.allowJs !== newSettings.allowJs);
+                 oldSettings.allowJs !== newSettings.allowJs ||
+                 oldSettings.disableSizeLimit !== oldSettings.disableSizeLimit);
 
             // Now create a new compiler
             const compilerHost: CompilerHost = {

From d4eb3b8d12420494d64d42b40e203c86c58daa3c Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Mon, 14 Mar 2016 20:43:22 -0700
Subject: [PATCH 016/332] Don't count current opened client file if it's TS
 file

---
 src/server/editorServices.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 456ff0ed26a..6f8006986ed 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -1225,7 +1225,9 @@ namespace ts.server {
                     if (this.host.fileExists(clientFileName)) {
                         const currentClientFileInfo = this.openFile(clientFileName, /*openedByClient*/ true);
                         project.addRoot(currentClientFileInfo);
-                        programSizeForNonTsFiles += currentClientFileInfo.content.length;
+                        if (!hasTypeScriptFileExtension(currentClientFileInfo.fileName) && currentClientFileInfo.content) {
+                            programSizeForNonTsFiles += currentClientFileInfo.content.length;
+                        }
                     }
                     else {
                         return { errorMsg: "specified file " + clientFileName + " not found" };

From 225e3b4f45e0c300b7f8dda3df1c1886887ed95e Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Wed, 16 Mar 2016 23:01:24 -0700
Subject: [PATCH 017/332] Speed up file searching

---
 src/compiler/commandLineParser.ts |  4 ++--
 src/compiler/sys.ts               | 17 +++++++++++++++--
 src/compiler/types.ts             |  2 +-
 3 files changed, 18 insertions(+), 5 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 34a84ac793f..f535140eeaf 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -637,10 +637,10 @@ namespace ts {
                 const supportedExtensions = getSupportedExtensions(options);
                 Debug.assert(indexOf(supportedExtensions, ".ts") < indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
 
+                const potentialFiles = host.readDirectory(basePath, supportedExtensions, exclude);
                 // Get files of supported extensions in their order of resolution
                 for (const extension of supportedExtensions) {
-                    const filesInDirWithExtension = host.readDirectory(basePath, extension, exclude);
-                    for (const fileName of filesInDirWithExtension) {
+                    for (const fileName of potentialFiles) {
                         // .ts extension would read the .d.ts extension files too but since .d.ts is lower priority extension,
                         // lets pick them when its turn comes up
                         if (extension === ".ts" && fileExtensionIs(fileName, ".d.ts")) {
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 1c7164aeb01..924fe92990b 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -489,11 +489,24 @@ namespace ts {
                 return fileSystemEntryExists(path, FileSystemEntryKind.Directory);
             }
 
-            function readDirectory(path: string, extension?: string, exclude?: string[]): string[] {
+            function readDirectory(path: string, extension?: string | string[], exclude?: string[]): string[] {
                 const result: string[] = [];
                 exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
                 visitDirectory(path);
                 return result;
+
+                function checkExtension(name: string) {
+                    if (!extension) {
+                        return true;
+                    }
+                    if (typeof extension === "string") {
+                        return fileExtensionIs(name, extension);
+                    }
+                    if (typeof extension === "string[]") {
+                        return forEach(extension, ext => fileExtensionIs(name, ext));
+                    }
+                }
+
                 function visitDirectory(path: string) {
                     const files = _fs.readdirSync(path || ".").sort();
                     const directories: string[] = [];
@@ -505,7 +518,7 @@ namespace ts {
                             try {
                                 const stat = _fs.statSync(name);
                                 if (stat.isFile()) {
-                                    if (!extension || fileExtensionIs(name, extension)) {
+                                    if (checkExtension(name)) {
                                         result.push(name);
                                     }
                                 }
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 95a1e32c401..af765eb17b0 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1580,7 +1580,7 @@ namespace ts {
     }
 
     export interface ParseConfigHost {
-        readDirectory(rootDir: string, extension: string, exclude: string[]): string[];
+        readDirectory(rootDir: string, extension: string | string[], exclude: string[]): string[];
     }
 
     export interface WriteFileCallback {

From c8e0b000070bb5bc1568e99fb46b53b3492a3c50 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Thu, 17 Mar 2016 15:55:53 -0700
Subject: [PATCH 018/332] Make language service optional for a project

---
 src/compiler/commandLineParser.ts |  10 +-
 src/compiler/program.ts           |  46 ++++----
 src/compiler/sys.ts               |  78 ++++++++------
 src/compiler/types.ts             |   5 +-
 src/compiler/utilities.ts         |   2 -
 src/server/editorServices.ts      | 168 +++++++++++++++++++++++-------
 src/server/protocol.d.ts          |   1 +
 src/server/session.ts             |  53 ++++++----
 8 files changed, 249 insertions(+), 114 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index f535140eeaf..d7e58b20ca5 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -637,7 +637,15 @@ namespace ts {
                 const supportedExtensions = getSupportedExtensions(options);
                 Debug.assert(indexOf(supportedExtensions, ".ts") < indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
 
-                const potentialFiles = host.readDirectory(basePath, supportedExtensions, exclude);
+                const potentialFiles: string[] = [];
+                if (host.readDirectoryWithMultipleExtensions) {
+                    addRange(potentialFiles, host.readDirectoryWithMultipleExtensions(basePath, supportedExtensions, exclude));
+                }
+                else {
+                    for (const extension of supportedExtensions) {
+                        addRange(potentialFiles, host.readDirectory(basePath, extension, exclude));
+                    }
+                }
                 // Get files of supported extensions in their order of resolution
                 for (const extension of supportedExtensions) {
                     for (const fileName of potentialFiles) {
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 2da1fffdb8b..64a487baad2 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -7,6 +7,7 @@ namespace ts {
     /* @internal */ export let emitTime = 0;
     /* @internal */ export let ioReadTime = 0;
     /* @internal */ export let ioWriteTime = 0;
+    /* @internal */ export const maxProgramSizeForNonTsFiles = 20 * 1024 * 1024;
 
     /** The version of the TypeScript compiler release */
 
@@ -696,6 +697,7 @@ namespace ts {
         let diagnosticsProducingTypeChecker: TypeChecker;
         let noDiagnosticsTypeChecker: TypeChecker;
         let classifiableNames: Map<string>;
+        let programSizeLimitExceeded = false;
         let programSizeForNonTsFiles = 0;
 
         let skipDefaultLib = options.noLib;
@@ -792,6 +794,11 @@ namespace ts {
 
         return program;
 
+        function exceedProgramSizeLimit() {
+            return !options.disableSizeLimit && programSizeLimitExceeded;
+        }
+
+
         function getCommonSourceDirectory() {
             if (typeof commonSourceDirectory === "undefined") {
                 if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
@@ -1417,7 +1424,7 @@ namespace ts {
                 }
             }
 
-            if (diagnostic) {
+            if (diagnostic && !exceedProgramSizeLimit()) {
                 if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
                     fileProcessingDiagnostics.add(createFileDiagnostic(refFile, refPos, refEnd - refPos, diagnostic, ...diagnosticArgument));
                 }
@@ -1454,25 +1461,9 @@ namespace ts {
                 return file;
             }
 
-            if (!options.disableSizeLimit) {
-                if (programSizeForNonTsFiles === -1) {
-                    return;
-                }
-                if (programSizeForNonTsFiles > maxProgramSizeForNonTsFiles) {
-                    // If the program size limit was reached when processing a file, this file is
-                    // likely in the problematic folder than contains too many files.
-                    // Normally the folder is one level down from the commonSourceDirectory, for example,
-                    // if the commonSourceDirectory is "/src/", and the last processed path was "/src/node_modules/a/b.js",
-                    // we should show in the error message "/src/node_modules/".
-                    const commonSourceDirectory = getCommonSourceDirectory();
-                    let rootLevelDirectory = path.substring(0, Math.max(commonSourceDirectory.length, path.indexOf(directorySeparator, commonSourceDirectory.length)));
-                    if (rootLevelDirectory[rootLevelDirectory.length - 1] !== directorySeparator) {
-                        rootLevelDirectory += directorySeparator;
-                    }
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Too_many_JavaScript_files_in_the_project_Consider_specifying_the_exclude_setting_in_project_configuration_to_limit_included_source_folders_The_likely_folder_to_exclude_is_0_To_disable_the_project_size_limit_set_the_disableSizeLimit_compiler_option_to_true, rootLevelDirectory));
-                    programSizeForNonTsFiles = -1;
-                    return;
-                }
+            const isNonTsFile = !hasTypeScriptFileExtension(fileName);
+            if (isNonTsFile && exceedProgramSizeLimit()) {
+                return undefined;
             }
 
             // We haven't looked for this file, do so now and cache result
@@ -1488,6 +1479,21 @@ namespace ts {
 
             if (!options.disableSizeLimit && file && file.text && !hasTypeScriptFileExtension(file.fileName)) {
                 programSizeForNonTsFiles += file.text.length;
+                if (programSizeForNonTsFiles > maxProgramSizeForNonTsFiles) {
+                    // If the program size limit was reached when processing a file, this file is
+                    // likely in the problematic folder than contains too many files.
+                    // Normally the folder is one level down from the commonSourceDirectory, for example,
+                    // if the commonSourceDirectory is "/src/", and the last processed path was "/src/node_modules/a/b.js",
+                    // we should show in the error message "/src/node_modules/".
+                    const commonSourceDirectory = getCommonSourceDirectory();
+                    let rootLevelDirectory = path.substring(0, Math.max(commonSourceDirectory.length, path.indexOf(directorySeparator, commonSourceDirectory.length)));
+                    if (rootLevelDirectory[rootLevelDirectory.length - 1] !== directorySeparator) {
+                        rootLevelDirectory += directorySeparator;
+                    }
+                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Too_many_JavaScript_files_in_the_project_Consider_specifying_the_exclude_setting_in_project_configuration_to_limit_included_source_folders_The_likely_folder_to_exclude_is_0_To_disable_the_project_size_limit_set_the_disableSizeLimit_compiler_option_to_true, rootLevelDirectory));
+                    programSizeLimitExceeded = true;
+                    return undefined;
+                }
             }
 
             filesByName.set(path, file);
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 924fe92990b..3b8b9b3f39f 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -10,6 +10,7 @@ namespace ts {
         useCaseSensitiveFileNames: boolean;
         write(s: string): void;
         readFile(path: string, encoding?: string): string;
+        getFileSize?(path: string): number;
         writeFile(path: string, data: string, writeByteOrderMark?: boolean): void;
         watchFile?(path: Path, callback: FileWatcherCallback): FileWatcher;
         watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
@@ -20,6 +21,7 @@ namespace ts {
         getExecutingFilePath(): string;
         getCurrentDirectory(): string;
         readDirectory(path: string, extension?: string, exclude?: string[]): string[];
+        readDirectoryWithMultipleExtensions?(path: string, extensions: string[], exclude?: string[]): string[];
         getMemoryUsage?(): number;
         exit(exitCode?: number): void;
     }
@@ -489,10 +491,32 @@ namespace ts {
                 return fileSystemEntryExists(path, FileSystemEntryKind.Directory);
             }
 
-            function readDirectory(path: string, extension?: string | string[], exclude?: string[]): string[] {
+            function visitDirectory(path: string, extension: string | string[], exclude: string[]) {
                 const result: string[] = [];
-                exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
-                visitDirectory(path);
+                const files = _fs.readdirSync(path || ".").sort();
+                const directories: string[] = [];
+                for (const current of files) {
+                    const name = combinePaths(path, current);
+                    if (!contains(exclude, getCanonicalPath(name))) {
+                        // fs.statSync would throw an exception if the file is a symlink
+                        // whose linked file doesn't exist.
+                        try {
+                            const stat = _fs.statSync(name);
+                            if (stat.isFile()) {
+                                if (checkExtension(name)) {
+                                    result.push(name);
+                                }
+                            }
+                            else if (stat.isDirectory()) {
+                                directories.push(name);
+                            }
+                        }
+                        catch (e) { }
+                    }
+                }
+                for (const current of directories) {
+                    visitDirectory(current, extension, exclude);
+                }
                 return result;
 
                 function checkExtension(name: string) {
@@ -502,37 +526,20 @@ namespace ts {
                     if (typeof extension === "string") {
                         return fileExtensionIs(name, extension);
                     }
-                    if (typeof extension === "string[]") {
+                    else {
                         return forEach(extension, ext => fileExtensionIs(name, ext));
                     }
                 }
+            }
 
-                function visitDirectory(path: string) {
-                    const files = _fs.readdirSync(path || ".").sort();
-                    const directories: string[] = [];
-                    for (const current of files) {
-                        const name = combinePaths(path, current);
-                        if (!contains(exclude, getCanonicalPath(name))) {
-                            // fs.statSync would throw an exception if the file is a symlink
-                            // whose linked file doesn't exist.
-                            try {
-                                const stat = _fs.statSync(name);
-                                if (stat.isFile()) {
-                                    if (checkExtension(name)) {
-                                        result.push(name);
-                                    }
-                                }
-                                else if (stat.isDirectory()) {
-                                    directories.push(name);
-                                }
-                            }
-                            catch (e) { }
-                        }
-                    }
-                    for (const current of directories) {
-                        visitDirectory(current);
-                    }
-                }
+            function readDirectoryWithMultipleExtensions(path: string, extensions: string[], exclude?: string[]): string[] {
+                exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
+                return visitDirectory(path, extensions, exclude);
+            }
+
+            function readDirectory(path: string, extension?: string, exclude?: string[]): string[] {
+                exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
+                return visitDirectory(path, extension, exclude);
             }
 
             return {
@@ -597,12 +604,23 @@ namespace ts {
                     return process.cwd();
                 },
                 readDirectory,
+                readDirectoryWithMultipleExtensions,
                 getMemoryUsage() {
                     if (global.gc) {
                         global.gc();
                     }
                     return process.memoryUsage().heapUsed;
                 },
+                getFileSize(path) {
+                    try {
+                        const stat = _fs.statSync(path);
+                        if (stat.isFile()) {
+                            return stat.size;
+                        }
+                    }
+                    catch (e) { }
+                    return 0;
+                },
                 exit(exitCode?: number): void {
                     process.exit(exitCode);
                 }
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index af765eb17b0..3638cc3a92f 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1580,7 +1580,8 @@ namespace ts {
     }
 
     export interface ParseConfigHost {
-        readDirectory(rootDir: string, extension: string | string[], exclude: string[]): string[];
+        readDirectory(rootDir: string, extension: string, exclude: string[]): string[];
+        readDirectoryWithMultipleExtensions?(rootDir: string, extensions: string[], exclude: string[]): string[];
     }
 
     export interface WriteFileCallback {
@@ -2440,7 +2441,7 @@ namespace ts {
         allowJs?: boolean;
         noImplicitUseStrict?: boolean;
         disableSizeLimit?: boolean;
-	lib?: string[];
+        lib?: string[];
         /* @internal */ stripInternal?: boolean;
 
         // Skip checking lib.d.ts to help speed up tests.
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 68db246cb9a..6520e339ac9 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -2870,6 +2870,4 @@ namespace ts {
     export function isParameterPropertyDeclaration(node: ParameterDeclaration): boolean {
         return node.flags & NodeFlags.AccessibilityModifier && node.parent.kind === SyntaxKind.Constructor && isClassLike(node.parent.parent);
     }
-
-    export const maxProgramSizeForNonTsFiles = 20 * 1024 * 1024;
 }
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 8c3429ac698..2eef384df5c 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -347,12 +347,29 @@ namespace ts.server {
         /** Used for configured projects which may have multiple open roots */
         openRefCount = 0;
 
-        constructor(public projectService: ProjectService, public projectOptions?: ProjectOptions) {
+        constructor(
+            public projectService: ProjectService,
+            public projectOptions?: ProjectOptions,
+            public languageServiceDiabled?: boolean) {
             if (projectOptions && projectOptions.files) {
                 // If files are listed explicitly, allow all extensions
                 projectOptions.compilerOptions.allowNonTsExtensions = true;
             }
-            this.compilerService = new CompilerService(this, projectOptions && projectOptions.compilerOptions);
+            if (!languageServiceDiabled) {
+                this.compilerService = new CompilerService(this, projectOptions && projectOptions.compilerOptions);
+            }
+        }
+
+        enableLanguageService() {
+            // if the language service was disabled, we should re-initiate the compiler service
+            if (this.languageServiceDiabled) {
+                this.compilerService = new CompilerService(this, this.projectOptions && this.projectOptions.compilerOptions);
+            }
+            this.languageServiceDiabled = false;
+        }
+
+        disableLanguageService() {
+            this.languageServiceDiabled = true;
         }
 
         addOpenRef() {
@@ -369,19 +386,36 @@ namespace ts.server {
         }
 
         getRootFiles() {
+            if (this.languageServiceDiabled) {
+                // When the languageService was disabled, only return file list if it is a configured project
+                return this.projectOptions ? this.projectOptions.files : undefined;
+            }
+
             return this.compilerService.host.roots.map(info => info.fileName);
         }
 
         getFileNames() {
+            if (this.languageServiceDiabled) {
+                return this.projectOptions ? this.projectOptions.files : undefined;
+            }
+
             const sourceFiles = this.program.getSourceFiles();
             return sourceFiles.map(sourceFile => sourceFile.fileName);
         }
 
         getSourceFile(info: ScriptInfo) {
+            if (this.languageServiceDiabled) {
+                return undefined;
+            }
+
             return this.filenameToSourceFile[info.fileName];
         }
 
         getSourceFileFromName(filename: string, requireOpen?: boolean) {
+            if (this.languageServiceDiabled) {
+                return undefined;
+            }
+
             const info = this.projectService.getScriptInfo(filename);
             if (info) {
                 if ((!requireOpen) || info.isOpen) {
@@ -391,15 +425,30 @@ namespace ts.server {
         }
 
         isRoot(info: ScriptInfo) {
+            if (this.languageServiceDiabled) {
+                if (!this.projectOptions) {
+                    return undefined;
+                }
+                return forEach(this.projectOptions.files, file => toPath(file, file, createGetCanonicalFileName(this.projectService.host.useCaseSensitiveFileNames)) === info.path);
+            }
+
             return this.compilerService.host.roots.some(root => root === info);
         }
 
         removeReferencedFile(info: ScriptInfo) {
+            if (this.languageServiceDiabled) {
+                return;
+            }
+
             this.compilerService.host.removeReferencedFile(info);
             this.updateGraph();
         }
 
         updateFileMap() {
+            if (this.languageServiceDiabled) {
+                return;
+            }
+
             this.filenameToSourceFile = {};
             const sourceFiles = this.program.getSourceFiles();
             for (let i = 0, len = sourceFiles.length; i < len; i++) {
@@ -409,11 +458,19 @@ namespace ts.server {
         }
 
         finishGraph() {
+            if (this.languageServiceDiabled) {
+                return;
+            }
+
             this.updateGraph();
             this.compilerService.languageService.getNavigateToItems(".*");
         }
 
         updateGraph() {
+            if (this.languageServiceDiabled) {
+                return;
+            }
+
             this.program = this.compilerService.languageService.getProgram();
             this.updateFileMap();
         }
@@ -424,15 +481,32 @@ namespace ts.server {
 
         // add a root file to project
         addRoot(info: ScriptInfo) {
+            if (this.languageServiceDiabled) {
+                return;
+            }
+
             this.compilerService.host.addRoot(info);
         }
 
         // remove a root file from project
         removeRoot(info: ScriptInfo) {
+            if (this.languageServiceDiabled) {
+                return;
+            }
+
             this.compilerService.host.removeRoot(info);
         }
 
         filesToString() {
+            if (this.languageServiceDiabled) {
+                if (this.projectOptions) {
+                    let strBuilder = "";
+                    ts.forEach(this.projectOptions.files,
+                        file => { strBuilder += file + "\n"; });
+                    return strBuilder;
+                }
+            }
+
             let strBuilder = "";
             ts.forEachValue(this.filenameToSourceFile,
                 sourceFile => { strBuilder += sourceFile.fileName + "\n"; });
@@ -443,7 +517,9 @@ namespace ts.server {
             this.projectOptions = projectOptions;
             if (projectOptions.compilerOptions) {
                 projectOptions.compilerOptions.allowNonTsExtensions = true;
-                this.compilerService.setCompilerOptions(projectOptions.compilerOptions);
+                if (!this.languageServiceDiabled) {
+                    this.compilerService.setCompilerOptions(projectOptions.compilerOptions);
+                }
             }
         }
     }
@@ -1055,10 +1131,12 @@ namespace ts.server {
          * @param fileContent is a known version of the file content that is more up to date than the one on disk
          */
         openClientFile(fileName: string, fileContent?: string) {
+            this.log("start openClientFile: " + new Date().getTime());
             this.openOrUpdateConfiguredProjectForFile(fileName);
             const info = this.openFile(fileName, /*openedByClient*/ true, fileContent);
             this.addOpenFile(info);
             this.printProjects();
+            this.log("end openClientFile: " + new Date().getTime());
             return info;
         }
 
@@ -1068,6 +1146,7 @@ namespace ts.server {
          * the tsconfig file content and update the project; otherwise we create a new one.
          */
         openOrUpdateConfiguredProjectForFile(fileName: string) {
+            this.log("start openOrUpdateConfiguredProjectForFile: " + new Date().getTime());
             const searchPath = ts.normalizePath(getDirectoryPath(fileName));
             this.log("Search path: " + searchPath, "Info");
             const configFileName = this.findConfigFile(searchPath);
@@ -1091,6 +1170,7 @@ namespace ts.server {
             else {
                 this.log("No config files found.");
             }
+            this.log("end openOrUpdateConfiguredProjectForFile: " + new Date().getTime());
         }
 
         /**
@@ -1207,53 +1287,49 @@ namespace ts.server {
                     return { succeeded: true, projectOptions };
                 }
             }
+        }
 
+        private exceedTotalNonTsFileSizeLimit(fileNames: string[]) {
+            let totalNonTsFileSize = 0;
+            for (const fileName of fileNames) {
+                if (hasTypeScriptFileExtension(fileName)) {
+                    continue;
+                }
+                totalNonTsFileSize += this.host.getFileSize(fileName);
+                if (totalNonTsFileSize > maxProgramSizeForNonTsFiles) {
+                    return true;
+                }
+            }
+            return false;
         }
 
         openConfigFile(configFilename: string, clientFileName?: string): ProjectOpenResult {
+            this.log("start openConfigFile: " + new Date().getTime());
             const { succeeded, projectOptions, error } = this.configFileToProjectOptions(configFilename);
+            this.log("finish reading config file: " + new Date().getTime());
             if (!succeeded) {
+                this.log("finish openConfigFile: " + new Date().getTime());
                 return error;
             }
             else {
-                const project = this.createProject(configFilename, projectOptions);
-                let programSizeForNonTsFiles = 0;
+                if (!projectOptions.compilerOptions.disableSizeLimit && projectOptions.compilerOptions.allowJs) {
+                    if (this.exceedTotalNonTsFileSizeLimit(projectOptions.files)) {
+                        const project = this.createProject(configFilename, projectOptions, /*languageServiceDisabled*/ true);
 
-                // As the project openning might not be complete if there are too many files,
-                // therefore to surface the diagnostics we need to make sure the given client file is opened.
-                if (clientFileName) {
-                    if (this.host.fileExists(clientFileName)) {
-                        const currentClientFileInfo = this.openFile(clientFileName, /*openedByClient*/ true);
-                        project.addRoot(currentClientFileInfo);
-                        if (!hasTypeScriptFileExtension(currentClientFileInfo.fileName) && currentClientFileInfo.content) {
-                            programSizeForNonTsFiles += currentClientFileInfo.content.length;
-                        }
-                    }
-                    else {
-                        return { errorMsg: "specified file " + clientFileName + " not found" };
+                        // for configured projects with languageService disabled, we only watch its config file,
+                        // do not care about the directory changes in the folder.
+                        project.projectFileWatcher = this.host.watchFile(
+                            toPath(configFilename, configFilename, createGetCanonicalFileName(sys.useCaseSensitiveFileNames)),
+                            _ => this.watchedProjectConfigFileChanged(project));
+                        return { success: true, project };
                     }
                 }
 
+                const project = this.createProject(configFilename, projectOptions);
                 for (const rootFilename of projectOptions.files) {
-                    if (rootFilename === clientFileName) {
-                        continue;
-                    }
-
                     if (this.host.fileExists(rootFilename)) {
-                        if (projectOptions.compilerOptions.disableSizeLimit) {
-                            const info = this.openFile(rootFilename, /*openedByClient*/ false);
-                            project.addRoot(info);
-                        }
-                        else if (programSizeForNonTsFiles <= maxProgramSizeForNonTsFiles) {
-                            const info = this.openFile(rootFilename, /*openedByClient*/ false);
-                            project.addRoot(info);
-                            if (!hasTypeScriptFileExtension(rootFilename)) {
-                                programSizeForNonTsFiles += info.content.length;
-                            }
-                        }
-                        else {
-                            break;
-                        }
+                        const info = this.openFile(rootFilename, /*openedByClient*/ clientFileName == rootFilename);
+                        project.addRoot(info);
                     }
                     else {
                         return { errorMsg: "specified file " + rootFilename + " not found" };
@@ -1269,6 +1345,7 @@ namespace ts.server {
                     path => this.directoryWatchedForSourceFilesChanged(project, path),
                     /*recursive*/ true
                 );
+                this.log("finish openConfigFile: " + new Date().getTime());
                 return { success: true, project: project };
             }
         }
@@ -1284,6 +1361,23 @@ namespace ts.server {
                     return error;
                 }
                 else {
+                    if (this.exceedTotalNonTsFileSizeLimit(projectOptions.files)) {
+                        project.disableLanguageService();
+                        project.directoryWatcher.close();
+                        project.directoryWatcher = undefined;
+                        project.setProjectOptions(projectOptions);
+                        return;
+                    }
+
+                    project.enableLanguageService();
+                    if (!project.directoryWatcher) {
+                        project.directoryWatcher = this.host.watchDirectory(
+                            ts.getDirectoryPath(project.projectFilename),
+                            path => this.directoryWatchedForSourceFilesChanged(project, path),
+                            /*recursive*/ true
+                        );
+                    }
+
                     // if the project is too large, the root files might not have been all loaded if the total
                     // program size reached the upper limit. In that case project.projectOptions.files should 
                     // be more precise. However this would only happen for configured project.
@@ -1330,8 +1424,8 @@ namespace ts.server {
             }
         }
 
-        createProject(projectFilename: string, projectOptions?: ProjectOptions) {
-            const project = new Project(this, projectOptions);
+        createProject(projectFilename: string, projectOptions?: ProjectOptions, languageServiceDisabled?: boolean) {
+            const project = new Project(this, projectOptions, languageServiceDisabled);
             project.projectFilename = projectFilename;
             return project;
         }
diff --git a/src/server/protocol.d.ts b/src/server/protocol.d.ts
index 5ed227ebaa7..3a9746dc109 100644
--- a/src/server/protocol.d.ts
+++ b/src/server/protocol.d.ts
@@ -123,6 +123,7 @@ declare namespace ts.server.protocol {
           * The list of normalized file name in the project, including 'lib.d.ts'
           */
         fileNames?: string[];
+        languageServiceDisabled?: boolean;
     }
 
     /** 
diff --git a/src/server/session.ts b/src/server/session.ts
index f0975a3f947..a66fbc8a5e4 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -288,7 +288,7 @@ namespace ts.server {
         private getDefinition(line: number, offset: number, fileName: string): protocol.FileSpan[] {
             const file = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(file);
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -310,7 +310,7 @@ namespace ts.server {
         private getTypeDefinition(line: number, offset: number, fileName: string): protocol.FileSpan[] {
             const file = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(file);
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -333,7 +333,7 @@ namespace ts.server {
             fileName = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(fileName);
 
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -363,7 +363,7 @@ namespace ts.server {
             fileName = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(fileName);
 
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -396,24 +396,29 @@ namespace ts.server {
         }
 
         private getProjectInfo(fileName: string, needFileNameList: boolean): protocol.ProjectInfo {
+            this.logger.info("start getProjectInfo:" + new Date().getTime());
             fileName = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(fileName);
+            if (!project) {
+                throw Errors.NoProject;
+            }
 
             const projectInfo: protocol.ProjectInfo = {
-                configFileName: project.projectFilename
+                configFileName: project.projectFilename,
+                languageServiceDisabled: project.languageServiceDiabled
             };
 
             if (needFileNameList) {
                 projectInfo.fileNames = project.getFileNames();
             }
-
+            this.logger.info("end getProjectInfo:" + new Date().getTime());
             return projectInfo;
         }
 
         private getRenameLocations(line: number, offset: number, fileName: string, findInComments: boolean, findInStrings: boolean): protocol.RenameResponseBody {
             const file = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(file);
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -483,7 +488,7 @@ namespace ts.server {
             // can avoid duplicates by eliminating same ref file from subsequent projects
             const file = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(file);
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -537,7 +542,7 @@ namespace ts.server {
         private getQuickInfo(line: number, offset: number, fileName: string): protocol.QuickInfoResponseBody {
             const file = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(file);
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -563,7 +568,7 @@ namespace ts.server {
         private getFormattingEditsForRange(line: number, offset: number, endLine: number, endOffset: number, fileName: string): protocol.CodeEdit[] {
             const file = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(file);
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -591,7 +596,7 @@ namespace ts.server {
             const file = ts.normalizePath(fileName);
 
             const project = this.projectService.getProjectForFile(file);
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -669,7 +674,7 @@ namespace ts.server {
             }
             const file = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(file);
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -693,7 +698,7 @@ namespace ts.server {
             entryNames: string[], fileName: string): protocol.CompletionEntryDetails[] {
             const file = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(file);
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -712,7 +717,7 @@ namespace ts.server {
         private getSignatureHelpItems(line: number, offset: number, fileName: string): protocol.SignatureHelpItems {
             const file = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(file);
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -742,7 +747,7 @@ namespace ts.server {
             const checkList = fileNames.reduce((accum: PendingErrorCheck[], fileName: string) => {
                 fileName = ts.normalizePath(fileName);
                 const project = this.projectService.getProjectForFile(fileName);
-                if (project) {
+                if (project && !project.languageServiceDiabled) {
                     accum.push({ fileName, project });
                 }
                 return accum;
@@ -756,7 +761,7 @@ namespace ts.server {
         private change(line: number, offset: number, endLine: number, endOffset: number, insertString: string, fileName: string) {
             const file = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(file);
-            if (project) {
+            if (project && !project.languageServiceDiabled) {
                 const compilerService = project.compilerService;
                 const start = compilerService.host.lineOffsetToPosition(file, line, offset);
                 const end = compilerService.host.lineOffsetToPosition(file, endLine, endOffset);
@@ -772,7 +777,7 @@ namespace ts.server {
             const file = ts.normalizePath(fileName);
             const tmpfile = ts.normalizePath(tempFileName);
             const project = this.projectService.getProjectForFile(file);
-            if (project) {
+            if (project && !project.languageServiceDiabled) {
                 this.changeSeq++;
                 // make sure no changes happen before this one is finished
                 project.compilerService.host.reloadScript(file, tmpfile, () => {
@@ -786,7 +791,7 @@ namespace ts.server {
             const tmpfile = ts.normalizePath(tempFileName);
 
             const project = this.projectService.getProjectForFile(file);
-            if (project) {
+            if (project && !project.languageServiceDiabled) {
                 project.compilerService.host.saveTo(file, tmpfile);
             }
         }
@@ -821,7 +826,7 @@ namespace ts.server {
         private getNavigationBarItems(fileName: string): protocol.NavigationBarItem[] {
             const file = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(file);
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -837,7 +842,7 @@ namespace ts.server {
         private getNavigateToItems(searchValue: string, fileName: string, maxResultCount?: number): protocol.NavtoItem[] {
             const file = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(file);
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -877,7 +882,7 @@ namespace ts.server {
             const file = ts.normalizePath(fileName);
 
             const project = this.projectService.getProjectForFile(file);
-            if (!project) {
+            if (!project || project.languageServiceDiabled) {
                 throw Errors.NoProject;
             }
 
@@ -896,7 +901,11 @@ namespace ts.server {
         }
 
         getDiagnosticsForProject(delay: number, fileName: string) {
-            const { fileNames } = this.getProjectInfo(fileName, /*needFileNameList*/ true);
+            const { fileNames, languageServiceDisabled } = this.getProjectInfo(fileName, /*needFileNameList*/ true);
+            if (languageServiceDisabled) {
+                return;
+            }
+
             // No need to analyze lib.d.ts
             let fileNamesInProject = fileNames.filter((value, index, array) => value.indexOf("lib.d.ts") < 0);
 

From cb46f16406d32c1a8d38e57999ead4421fd9e496 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Thu, 17 Mar 2016 19:01:17 -0700
Subject: [PATCH 019/332] Fix failed tests

---
 src/compiler/commandLineParser.ts | 10 ++++++++--
 src/compiler/sys.ts               | 14 ++++++++------
 2 files changed, 16 insertions(+), 8 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index d7e58b20ca5..5ba54c6553c 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -649,6 +649,10 @@ namespace ts {
                 // Get files of supported extensions in their order of resolution
                 for (const extension of supportedExtensions) {
                     for (const fileName of potentialFiles) {
+                        if (!fileExtensionIs(fileName, extension)) {
+                            continue;
+                        }
+
                         // .ts extension would read the .d.ts extension files too but since .d.ts is lower priority extension,
                         // lets pick them when its turn comes up
                         if (extension === ".ts" && fileExtensionIs(fileName, ".d.ts")) {
@@ -669,8 +673,10 @@ namespace ts {
                             }
                         }
 
-                        filesSeen[fileName] = true;
-                        fileNames.push(fileName);
+                        if (!filesSeen[fileName]) {
+                            filesSeen[fileName] = true;
+                            fileNames.push(fileName);
+                        }
                     }
                 }
             }
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 3b8b9b3f39f..7cdc1624582 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -491,8 +491,7 @@ namespace ts {
                 return fileSystemEntryExists(path, FileSystemEntryKind.Directory);
             }
 
-            function visitDirectory(path: string, extension: string | string[], exclude: string[]) {
-                const result: string[] = [];
+            function visitDirectory(path: string, result: string[], extension: string | string[], exclude: string[]) {
                 const files = _fs.readdirSync(path || ".").sort();
                 const directories: string[] = [];
                 for (const current of files) {
@@ -515,9 +514,8 @@ namespace ts {
                     }
                 }
                 for (const current of directories) {
-                    visitDirectory(current, extension, exclude);
+                    visitDirectory(current, result, extension, exclude);
                 }
-                return result;
 
                 function checkExtension(name: string) {
                     if (!extension) {
@@ -533,13 +531,17 @@ namespace ts {
             }
 
             function readDirectoryWithMultipleExtensions(path: string, extensions: string[], exclude?: string[]): string[] {
+                const result: string[] = [];
                 exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
-                return visitDirectory(path, extensions, exclude);
+                visitDirectory(path, result, extensions, exclude);
+                return result;
             }
 
             function readDirectory(path: string, extension?: string, exclude?: string[]): string[] {
+                const result: string[] = [];
                 exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
-                return visitDirectory(path, extension, exclude);
+                visitDirectory(path, result, extension, exclude);
+                return result;
             }
 
             return {

From 74e3d7bb0133f3214770f8aadababa8ef0d4d15c Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Fri, 18 Mar 2016 11:00:26 -0700
Subject: [PATCH 020/332] Fix project updateing issue after editing config file

---
 src/server/editorServices.ts | 27 +++++++++++++++++++++++----
 1 file changed, 23 insertions(+), 4 deletions(-)

diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 2eef384df5c..2c9e26e47cb 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -1362,20 +1362,36 @@ namespace ts.server {
                 }
                 else {
                     if (this.exceedTotalNonTsFileSizeLimit(projectOptions.files)) {
+                        project.setProjectOptions(projectOptions);
+                        if (project.languageServiceDiabled) {
+                            return;
+                        }
+
                         project.disableLanguageService();
                         project.directoryWatcher.close();
-                        project.directoryWatcher = undefined;
-                        project.setProjectOptions(projectOptions);
                         return;
                     }
 
-                    project.enableLanguageService();
-                    if (!project.directoryWatcher) {
+                    if (project.languageServiceDiabled) {
+                        project.setProjectOptions(projectOptions);
+                        project.enableLanguageService();
                         project.directoryWatcher = this.host.watchDirectory(
                             ts.getDirectoryPath(project.projectFilename),
                             path => this.directoryWatchedForSourceFilesChanged(project, path),
                             /*recursive*/ true
                         );
+
+                        for (const rootFilename of projectOptions.files) {
+                            if (this.host.fileExists(rootFilename)) {
+                                const info = this.openFile(rootFilename, /*openedByClient*/ false);
+                                project.addRoot(info);
+                            }
+                            else {
+                                return { errorMsg: "specified file " + rootFilename + " not found" };
+                            }
+                        }
+                        project.finishGraph();
+                        return;
                     }
 
                     // if the project is too large, the root files might not have been all loaded if the total
@@ -1396,6 +1412,9 @@ namespace ts.server {
                     for (const fileName of fileNamesToAdd) {
                         let info = this.getScriptInfo(fileName);
                         if (!info) {
+                            if (!this.host.fileExists(info.fileName)) {
+                                return { errorMsg: "specified file " + info.fileName + " not found" };
+                            }
                             info = this.openFile(fileName, /*openedByClient*/ false);
                         }
                         else {

From df91ef0b382464c7c05419ffb2d35b50252a3a3a Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Mon, 28 Mar 2016 12:37:37 -0700
Subject: [PATCH 021/332] Simple case and scoping

---
 src/compiler/binder.ts               | 14 +++--
 src/compiler/checker.ts              | 24 +++++---
 src/compiler/diagnosticMessages.json |  4 ++
 src/compiler/parser.ts               | 86 +++++++++++++++++++++++-----
 src/compiler/types.ts                | 29 +++++++++-
 5 files changed, 130 insertions(+), 27 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 6957be484f3..881ad81cb2e 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -404,6 +404,13 @@ namespace ts {
             // This node will now be set as the parent of all of its children as we recurse into them.
             parent = node;
 
+            // Binding of JsDocComment should be done before the current block scope container changes.
+            // because the scope of JsDocComment should not be affected by whether the current node is a
+            // container or not.
+            if (isInJavaScriptFile(node) && node.jsDocComment) {
+                bind(node.jsDocComment);
+            }
+
             // Depending on what kind of node this is, we may have to adjust the current container
             // and block-container.   If the current node is a container, then it is automatically
             // considered the current block-container as well.  Also, for containers that we know
@@ -468,10 +475,6 @@ namespace ts {
                 labelStack = labelIndexMap = implicitLabels = undefined;
             }
 
-            if (isInJavaScriptFile(node) && node.jsDocComment) {
-                bind(node.jsDocComment);
-            }
-
             bindReachableStatement(node);
 
             if (currentReachabilityState === Reachability.Reachable && isFunctionLikeKind(kind) && nodeIsPresent((<FunctionLikeDeclaration>node).body)) {
@@ -857,7 +860,7 @@ namespace ts {
                     // their container in the tree.  To accomplish this, we simply add their declared
                     // symbol to the 'locals' of the container.  These symbols can then be found as
                     // the type checker walks up the containers, checking them for matching names.
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
             }
         }
 
@@ -1343,6 +1346,7 @@ namespace ts {
                     return bindClassLikeDeclaration(<ClassLikeDeclaration>node);
                 case SyntaxKind.InterfaceDeclaration:
                     return bindBlockScopedDeclaration(<Declaration>node, SymbolFlags.Interface, SymbolFlags.InterfaceExcludes);
+                case SyntaxKind.JSDocTypedefTag:
                 case SyntaxKind.TypeAliasDeclaration:
                     return bindBlockScopedDeclaration(<Declaration>node, SymbolFlags.TypeAlias, SymbolFlags.TypeAliasExcludes);
                 case SyntaxKind.EnumDeclaration:
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 9509c286236..ff416ec2cc5 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -3403,7 +3403,7 @@ namespace ts {
             return <InterfaceType>links.declaredType;
         }
 
-        function getDeclaredTypeOfTypeAlias(symbol: Symbol): Type {
+        function getDeclaredTypeOfTypeAlias(symbol: Symbol, node?: Node): Type {
             const links = getSymbolLinks(symbol);
             if (!links.declaredType) {
                 // Note that we use the links object as the target here because the symbol object is used as the unique
@@ -3411,8 +3411,18 @@ namespace ts {
                 if (!pushTypeResolution(symbol, TypeSystemPropertyName.DeclaredType)) {
                     return unknownType;
                 }
-                const declaration = <TypeAliasDeclaration>getDeclarationOfKind(symbol, SyntaxKind.TypeAliasDeclaration);
-                let type = getTypeFromTypeNode(declaration.type);
+
+                let typeNode: TypeNode;
+                let name: Identifier;
+                if (node && (node.flags & NodeFlags.JavaScriptFile)) {
+                    const declaration = <JSDocTypedefTag>getDeclarationOfKind(symbol, SyntaxKind.JSDocTypedefTag);
+                    typeNode = declaration.typeExpression.type;
+                }
+                if (!typeNode) {
+                    const declaration = <TypeAliasDeclaration>getDeclarationOfKind(symbol, SyntaxKind.TypeAliasDeclaration);
+                    typeNode = declaration.type;
+                }
+                let type = getTypeFromTypeNode(typeNode);
                 if (popTypeResolution()) {
                     links.typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
                     if (links.typeParameters) {
@@ -3424,7 +3434,7 @@ namespace ts {
                 }
                 else {
                     type = unknownType;
-                    error(declaration.name, Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
+                    error(name, Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
                 }
                 links.declaredType = type;
             }
@@ -3462,13 +3472,13 @@ namespace ts {
             return links.declaredType;
         }
 
-        function getDeclaredTypeOfSymbol(symbol: Symbol): Type {
+        function getDeclaredTypeOfSymbol(symbol: Symbol, node?: Node): Type {
             Debug.assert((symbol.flags & SymbolFlags.Instantiated) === 0);
             if (symbol.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
                 return getDeclaredTypeOfClassOrInterface(symbol);
             }
             if (symbol.flags & SymbolFlags.TypeAlias) {
-                return getDeclaredTypeOfTypeAlias(symbol);
+                return getDeclaredTypeOfTypeAlias(symbol, node);
             }
             if (symbol.flags & SymbolFlags.Enum) {
                 return getDeclaredTypeOfEnum(symbol);
@@ -4564,7 +4574,7 @@ namespace ts {
         // references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
         // declared type. Instantiations are cached using the type identities of the type arguments as the key.
         function getTypeFromTypeAliasReference(node: TypeReferenceNode | ExpressionWithTypeArguments | JSDocTypeReference, symbol: Symbol): Type {
-            const type = getDeclaredTypeOfSymbol(symbol);
+            const type = getDeclaredTypeOfSymbol(symbol, node);
             const links = getSymbolLinks(symbol);
             const typeParameters = links.typeParameters;
             if (typeParameters) {
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index d7c2fac2710..c887a9c7112 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -811,6 +811,10 @@
         "category": "Error",
         "code": 1249
     },
+    "'{0}' tag cannot be used independently as a top level JSDoc tag.": {
+        "category": "Error",
+        "code": 1250
+    },
     "'with' statements are not allowed in an async function block.": {
         "category": "Error",
         "code": 1300
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index b7c011631ee..91f225931d2 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -401,6 +401,8 @@ namespace ts {
                 return visitNode(cbNode, (<JSDocTypeTag>node).typeExpression);
             case SyntaxKind.JSDocTemplateTag:
                 return visitNodes(cbNodes, (<JSDocTemplateTag>node).typeParameters);
+            case SyntaxKind.JSDocTypedefTag:
+                return visitNode(cbNode, (<JSDocTypedefTag>node).typeExpression);
         }
     }
 
@@ -886,7 +888,7 @@ namespace ts {
 
         /** Invokes the provided callback then unconditionally restores the parser to the state it
          * was in immediately prior to invoking the callback.  The result of invoking the callback
-         * is returned from this function. 
+         * is returned from this function.
          */
         function lookAhead<T>(callback: () => T): T {
             return speculationHelper(callback, /*isLookAhead*/ true);
@@ -2068,11 +2070,11 @@ namespace ts {
         }
 
         function fillSignature(
-                returnToken: SyntaxKind,
-                yieldContext: boolean,
-                awaitContext: boolean,
-                requireCompleteParameterList: boolean,
-                signature: SignatureDeclaration): void {
+            returnToken: SyntaxKind,
+            yieldContext: boolean,
+            awaitContext: boolean,
+            requireCompleteParameterList: boolean,
+            signature: SignatureDeclaration): void {
 
             const returnTokenRequired = returnToken === SyntaxKind.EqualsGreaterThanToken;
             signature.typeParameters = parseTypeParameters();
@@ -3341,8 +3343,8 @@ namespace ts {
                     if (sourceFile.languageVariant !== LanguageVariant.JSX) {
                         return false;
                     }
-                    // We are in JSX context and the token is part of JSXElement.
-                    // Fall through
+                // We are in JSX context and the token is part of JSXElement.
+                // Fall through
                 default:
                     return true;
             }
@@ -4044,9 +4046,9 @@ namespace ts {
             const isAsync = !!(node.flags & NodeFlags.Async);
             node.name =
                 isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
-                isGenerator ? doInYieldContext(parseOptionalIdentifier) :
-                isAsync ? doInAwaitContext(parseOptionalIdentifier) :
-                parseOptionalIdentifier();
+                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
+                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
+                            parseOptionalIdentifier();
 
             fillSignature(SyntaxKind.ColonToken, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
             node.body = parseFunctionBlock(/*allowYield*/ isGenerator, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
@@ -4984,7 +4986,7 @@ namespace ts {
 
                 if (token === SyntaxKind.ConstKeyword && permitInvalidConstAsModifier) {
                     // We need to ensure that any subsequent modifiers appear on the same line
-                    // so that when 'const' is a standalone declaration, we don't issue an error.                
+                    // so that when 'const' is a standalone declaration, we don't issue an error.
                     if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
                         break;
                     }
@@ -5247,7 +5249,7 @@ namespace ts {
             node.decorators = decorators;
             setModifiers(node, modifiers);
             if (token === SyntaxKind.GlobalKeyword) {
-                // parse 'global' as name of global scope augmentation 
+                // parse 'global' as name of global scope augmentation
                 node.name = parseIdentifier();
                 node.flags |= NodeFlags.GlobalAugmentation;
             }
@@ -5829,7 +5831,7 @@ namespace ts {
             }
 
             function checkForEmptyTypeArgumentList(typeArguments: NodeArray<Node>) {
-                if (parseDiagnostics.length === 0 &&  typeArguments && typeArguments.length === 0) {
+                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
                     const start = typeArguments.pos - "<".length;
                     const end = skipTrivia(sourceText, typeArguments.end) + ">".length;
                     return parseErrorAtPosition(start, end - start, Diagnostics.Type_argument_list_cannot_be_empty);
@@ -5990,6 +5992,7 @@ namespace ts {
                 Debug.assert(end <= content.length);
 
                 let tags: NodeArray<JSDocTag>;
+                let currentParentJSDocDeclaration: Declaration;
 
                 let result: JSDocComment;
 
@@ -6097,6 +6100,11 @@ namespace ts {
                                 return handleTemplateTag(atToken, tagName);
                             case "type":
                                 return handleTypeTag(atToken, tagName);
+                            case "typedef":
+                                return handleTypedefTag(atToken, tagName);
+                            case "property":
+                            case "prop":
+                                return handlePropertyTag(atToken, tagName);
                         }
                     }
 
@@ -6204,6 +6212,56 @@ namespace ts {
                     return finishNode(result);
                 }
 
+                function handlePropertyTag(atToken: Node, tagName: Identifier): JSDocPropertyTag {
+                    if (!currentParentJSDocDeclaration) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, Diagnostics._0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag, tagName.text);
+                        return undefined;
+                    }
+
+                    const typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    const name = parseJSDocIdentifier();
+                    if (!name) {
+                        parseErrorAtPosition(scanner.getStartPos(), /*length*/ 0, Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+
+                    const result = <JSDocPropertyTag>createNode(SyntaxKind.JSDocPropertyTag, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.name = name;
+                    result.typeExpression = typeExpression;
+                    return finishNode(result);
+                }
+
+                function handleTypedefTag(atToken: Node, tagName: Identifier): JSDocTypedefTag {
+                    const typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    const name = parseJSDocIdentifier();
+                    if (!name) {
+                        parseErrorAtPosition(scanner.getStartPos(), 0, Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+
+                    const result = <JSDocTypedefTag>createNode(SyntaxKind.JSDocTypedefTag, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.name = name;
+                    result.typeExpression = typeExpression;
+
+                    // if (typeExpression && typeExpression.type.kind === SyntaxKind.JSDocTypeReference) {
+                    //     const jsDocTypeReference = <JSDocTypeReference>typeExpression.type;
+                    //     if (jsDocTypeReference.name.kind === SyntaxKind.Identifier) {
+                    //         const name = <Identifier>jsDocTypeReference.name;
+                    //         if (name.text === "Object") {
+                    //             currentParentJSDocDeclaration = declaration;
+                    //         }
+                    //     }
+                    // }
+
+                    return result;
+                }
+
                 function handleTemplateTag(atToken: Node, tagName: Identifier): JSDocTemplateTag {
                     if (forEach(tags, t => t.kind === SyntaxKind.JSDocTemplateTag)) {
                         parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, Diagnostics._0_tag_already_specified, tagName.text);
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 546d1631945..a0cc8d054e1 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -342,6 +342,10 @@ namespace ts {
         JSDocReturnTag,
         JSDocTypeTag,
         JSDocTemplateTag,
+        JSDocTypedefTag,
+        JSDocPropertyTag,
+        JSDocTypedefDeclaration,
+        JSDocTypeLiteral,
 
         // Synthesized list
         SyntaxList,
@@ -1510,6 +1514,29 @@ namespace ts {
         typeExpression: JSDocTypeExpression;
     }
 
+    // @kind(SyntaxKind.JSDocTypedefTag)
+    export interface JSDocTypedefTag extends JSDocTag, Declaration {
+        name: Identifier;
+        typeExpression: JSDocTypeExpression;
+    }
+
+    // @kind(SyntaxKind.JSDocPropertyTag)
+    export interface JSDocPropertyTag extends JSDocTag, TypeElement {
+        name: Identifier;
+        typeExpression: JSDocTypeExpression;
+    }
+
+    // @kind(SyntaxKind.JSDocTypedefDeclaration)
+    export interface JSDocTypedefDeclaration extends Declaration {
+        name: Identifier;
+        type: TypeNode;
+    }
+
+    // @kind(SyntaxKind.JSDocTypeLiteral)
+    export interface JSDocTypeLiteral extends TypeNode {
+        members: NodeArray<TypeElement>;
+    }
+
     // @kind(SyntaxKind.JSDocParameterTag)
     export interface JSDocParameterTag extends JSDocTag {
         preParameterName?: Identifier;
@@ -2094,7 +2121,7 @@ namespace ts {
         jsxFlags?: JsxFlags;              // flags for knowing what kind of element/attributes we're dealing with
         resolvedJsxType?: Type;           // resolved element attributes type of a JSX openinglike element
         hasSuperCall?: boolean;           // recorded result when we try to find super-call. We only try to find one if this flag is undefined, indicating that we haven't made an attempt.
-        superCall?: ExpressionStatement;  // Cached first super-call found in the constructor. Used in checking whether super is called before this-accessing 
+        superCall?: ExpressionStatement;  // Cached first super-call found in the constructor. Used in checking whether super is called before this-accessing
     }
 
     export const enum TypeFlags {

From 23bca4eda6b220a88771a6c922842f8da1c3b366 Mon Sep 17 00:00:00 2001
From: Zhengbo Li <zhengbli@mirosoft.com>
Date: Mon, 4 Apr 2016 00:44:51 -0700
Subject: [PATCH 022/332] Support the case with @property and @type

---
 src/compiler/binder.ts                        |   4 +
 src/compiler/checker.ts                       |  16 +-
 src/compiler/parser.ts                        | 142 +++++++++++++++---
 src/compiler/types.ts                         |  19 +--
 .../fourslash/server/jsdocCompletions.ts      |  15 ++
 5 files changed, 160 insertions(+), 36 deletions(-)
 create mode 100644 tests/cases/fourslash/server/jsdocCompletions.ts

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 881ad81cb2e..b3f163bbef1 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -744,6 +744,7 @@ namespace ts {
                 case SyntaxKind.EnumDeclaration:
                 case SyntaxKind.ObjectLiteralExpression:
                 case SyntaxKind.TypeLiteral:
+                case SyntaxKind.JSDocTypeLiteral:
                 case SyntaxKind.JSDocRecordType:
                     return ContainerFlags.IsContainer;
 
@@ -832,6 +833,7 @@ namespace ts {
                 case SyntaxKind.ObjectLiteralExpression:
                 case SyntaxKind.InterfaceDeclaration:
                 case SyntaxKind.JSDocRecordType:
+                case SyntaxKind.JSDocTypeLiteral:
                     // Interface/Object-types always have their children added to the 'members' of
                     // their container. They are only accessible through an instance of their
                     // container, and are never in scope otherwise (even inside the body of the
@@ -1294,6 +1296,7 @@ namespace ts {
                 case SyntaxKind.PropertyDeclaration:
                 case SyntaxKind.PropertySignature:
                 case SyntaxKind.JSDocRecordMember:
+                case SyntaxKind.JSDocPropertyTag:
                     return bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.Property | ((<PropertyDeclaration>node).questionToken ? SymbolFlags.Optional : SymbolFlags.None), SymbolFlags.PropertyExcludes);
                 case SyntaxKind.PropertyAssignment:
                 case SyntaxKind.ShorthandPropertyAssignment:
@@ -1326,6 +1329,7 @@ namespace ts {
                 case SyntaxKind.JSDocFunctionType:
                     return bindFunctionOrConstructorType(<SignatureDeclaration>node);
                 case SyntaxKind.TypeLiteral:
+                case SyntaxKind.JSDocTypeLiteral:
                 case SyntaxKind.JSDocRecordType:
                     return bindAnonymousDeclaration(<TypeLiteralNode>node, SymbolFlags.TypeLiteral, "__type");
                 case SyntaxKind.ObjectLiteralExpression:
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index ff416ec2cc5..e66e5e6a9d8 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -3412,17 +3412,14 @@ namespace ts {
                     return unknownType;
                 }
 
-                let typeNode: TypeNode;
-                let name: Identifier;
+                let declaration: JSDocTypedefTag | TypeAliasDeclaration;
                 if (node && (node.flags & NodeFlags.JavaScriptFile)) {
-                    const declaration = <JSDocTypedefTag>getDeclarationOfKind(symbol, SyntaxKind.JSDocTypedefTag);
-                    typeNode = declaration.typeExpression.type;
+                    declaration = <JSDocTypedefTag>getDeclarationOfKind(symbol, SyntaxKind.JSDocTypedefTag);
                 }
-                if (!typeNode) {
-                    const declaration = <TypeAliasDeclaration>getDeclarationOfKind(symbol, SyntaxKind.TypeAliasDeclaration);
-                    typeNode = declaration.type;
+                if (!declaration) {
+                    declaration = <TypeAliasDeclaration>getDeclarationOfKind(symbol, SyntaxKind.TypeAliasDeclaration);
                 }
-                let type = getTypeFromTypeNode(typeNode);
+                let type = getTypeFromTypeNode(declaration.type);
                 if (popTypeResolution()) {
                     links.typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
                     if (links.typeParameters) {
@@ -3434,7 +3431,7 @@ namespace ts {
                 }
                 else {
                     type = unknownType;
-                    error(name, Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
+                    error(declaration.name, Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
                 }
                 links.declaredType = type;
             }
@@ -5067,6 +5064,7 @@ namespace ts {
                 case SyntaxKind.FunctionType:
                 case SyntaxKind.ConstructorType:
                 case SyntaxKind.TypeLiteral:
+                case SyntaxKind.JSDocTypeLiteral:
                 case SyntaxKind.JSDocFunctionType:
                 case SyntaxKind.JSDocRecordType:
                     return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 91f225931d2..5de1369ee09 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -402,7 +402,15 @@ namespace ts {
             case SyntaxKind.JSDocTemplateTag:
                 return visitNodes(cbNodes, (<JSDocTemplateTag>node).typeParameters);
             case SyntaxKind.JSDocTypedefTag:
-                return visitNode(cbNode, (<JSDocTypedefTag>node).typeExpression);
+                return visitNode(cbNode, (<JSDocTypedefTag>node).name) ||
+                    visitNode(cbNode, (<JSDocTypedefTag>node).typeExpression) ||
+                    visitNode(cbNode, (<JSDocTypedefTag>node).type);
+            case SyntaxKind.JSDocTypeLiteral:
+                return visitNodes(cbNodes, (<JSDocTypeLiteral>node).members);
+            case SyntaxKind.JSDocPropertyTag:
+                return visitNode(cbNode, (<JSDocPropertyTag>node).name) ||
+                    visitNode(cbNode, (<JSDocPropertyTag>node).typeExpression) ||
+                    visitNode(cbNode, (<JSDocPropertyTag>node).type);
         }
     }
 
@@ -5992,7 +6000,8 @@ namespace ts {
                 Debug.assert(end <= content.length);
 
                 let tags: NodeArray<JSDocTag>;
-                let currentParentJSDocDeclaration: Declaration;
+                let currentParentJSDocTag: JSDocParentTag;
+                let currentParentJSDocTagEnd: number;
 
                 let result: JSDocComment;
 
@@ -6050,6 +6059,10 @@ namespace ts {
                             nextJSDocToken();
                         }
 
+                        if (currentParentJSDocTag) {
+                            finishCurrentParentTag();
+                        }
+
                         result = createJSDocComment();
 
                     });
@@ -6073,6 +6086,40 @@ namespace ts {
                     }
                 }
 
+                function finishCurrentParentTag(): void {
+                    if (!currentParentJSDocTag) {
+                        return;
+                    }
+
+                    if (currentParentJSDocTag.kind === SyntaxKind.JSDocTypedefTag) {
+                        const typedefTag = <JSDocTypedefTag>currentParentJSDocTag;
+                        if (typedefTag.jsDocTypeTag) {
+                            if (typedefTag.jsDocTypeTag.typeExpression.type.kind === SyntaxKind.JSDocTypeReference) {
+                                const typeTagtype = <JSDocTypeReference>typedefTag.jsDocTypeTag.typeExpression.type;
+                                if ((typeTagtype.name.kind !== SyntaxKind.Identifier) ||
+                                    (<Identifier>typeTagtype.name).text !== "Object") {
+                                    typedefTag.type = typedefTag.jsDocTypeTag.typeExpression.type;
+                                }
+                            }
+                            else {
+                                typedefTag.type = typedefTag.jsDocTypeTag.typeExpression.type;
+                            }
+                        }
+                        if (!typedefTag.type) {
+                            const tagType = <JSDocTypeLiteral>createNode(SyntaxKind.JSDocTypeLiteral, currentParentJSDocTag.pos);
+                            if (typedefTag.jsDocPropertyTags){
+                                tagType.members = <NodeArray<JSDocPropertyTag>>[];
+                                addRange(tagType.members, typedefTag.jsDocPropertyTags);
+                            }
+                            typedefTag.type = finishNode(tagType, currentParentJSDocTagEnd);
+                        }
+                    }
+
+                    addTag(finishNode(currentParentJSDocTag, currentParentJSDocTagEnd));
+                    currentParentJSDocTag = undefined;
+                    currentParentJSDocTagEnd = undefined;
+                }
+
                 function parseTag(): void {
                     Debug.assert(token === SyntaxKind.AtToken);
                     const atToken = createNode(SyntaxKind.AtToken, scanner.getTokenPos());
@@ -6085,22 +6132,30 @@ namespace ts {
                     }
 
                     const tag = handleTag(atToken, tagName) || handleUnknownTag(atToken, tagName);
-                    addTag(tag);
+                    if (!currentParentJSDocTag) {
+                        addTag(tag);
+                    }
                 }
 
                 function handleTag(atToken: Node, tagName: Identifier): JSDocTag {
                     if (tagName) {
                         switch (tagName.text) {
                             case "param":
+                                finishCurrentParentTag();
                                 return handleParamTag(atToken, tagName);
                             case "return":
                             case "returns":
+                                finishCurrentParentTag();
                                 return handleReturnTag(atToken, tagName);
                             case "template":
+                                finishCurrentParentTag();
                                 return handleTemplateTag(atToken, tagName);
                             case "type":
+                                // @typedef tag is allowed to have one @type tag, therefore seeing
+                                // a @type tag may not indicate the end of the current parent tag.
                                 return handleTypeTag(atToken, tagName);
                             case "typedef":
+                                finishCurrentParentTag();
                                 return handleTypedefTag(atToken, tagName);
                             case "property":
                             case "prop":
@@ -6130,6 +6185,25 @@ namespace ts {
                     }
                 }
 
+                function addToCurrentParentTag(tag: JSDocTag): void {
+                    if (!currentParentJSDocTag) {
+                        return;
+                    }
+                    switch (tag.kind) {
+                        case SyntaxKind.JSDocPropertyTag:
+                            if (!currentParentJSDocTag.jsDocPropertyTags) {
+                                currentParentJSDocTag.jsDocPropertyTags = <NodeArray<JSDocPropertyTag>>[];
+                            }
+                            currentParentJSDocTag.jsDocPropertyTags.push(<JSDocPropertyTag>tag);
+                            break;
+                        case SyntaxKind.JSDocTypeTag:
+                            if (!currentParentJSDocTag.jsDocTypeTag) {
+                                currentParentJSDocTag.jsDocTypeTag = <JSDocTypeTag>tag;
+                            }
+                            break;
+                    }
+                }
+
                 function tryParseTypeExpression(): JSDocTypeExpression {
                     if (token !== SyntaxKind.OpenBraceToken) {
                         return undefined;
@@ -6205,15 +6279,33 @@ namespace ts {
                         parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, Diagnostics._0_tag_already_specified, tagName.text);
                     }
 
-                    const result = <JSDocTypeTag>createNode(SyntaxKind.JSDocTypeTag, atToken.pos);
+                    let result = <JSDocTypeTag>createNode(SyntaxKind.JSDocTypeTag, atToken.pos);
                     result.atToken = atToken;
                     result.tagName = tagName;
                     result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
+                    result = finishNode(result);
+
+                    let typeTagPartOfParentTag = false;
+                    if (currentParentJSDocTag && currentParentJSDocTag.kind === SyntaxKind.JSDocTypedefTag) {
+                        const parentTag = <JSDocTypedefTag>currentParentJSDocTag;
+                        if (!parentTag.typeExpression && !parentTag.jsDocTypeTag) {
+                            typeTagPartOfParentTag = true;
+                            parentTag.jsDocTypeTag = result;
+                            currentParentJSDocTagEnd = scanner.getStartPos();
+                        }
+                    }
+                    if (!typeTagPartOfParentTag) {
+                        // If this @type tag is not part of the current parent tag, then
+                        // it denotes the end of the current parent tag.
+                        finishCurrentParentTag();
+                        return result;
+                    }
+
+                    return undefined;
                 }
 
                 function handlePropertyTag(atToken: Node, tagName: Identifier): JSDocPropertyTag {
-                    if (!currentParentJSDocDeclaration) {
+                    if (!currentParentJSDocTag) {
                         parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, Diagnostics._0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag, tagName.text);
                         return undefined;
                     }
@@ -6226,12 +6318,17 @@ namespace ts {
                         return undefined;
                     }
 
-                    const result = <JSDocPropertyTag>createNode(SyntaxKind.JSDocPropertyTag, atToken.pos);
+                    let result = <JSDocPropertyTag>createNode(SyntaxKind.JSDocPropertyTag, atToken.pos);
                     result.atToken = atToken;
                     result.tagName = tagName;
                     result.name = name;
                     result.typeExpression = typeExpression;
-                    return finishNode(result);
+                    result.type = typeExpression.type;
+                    result = finishNode(result);
+
+                    addToCurrentParentTag(result);
+                    currentParentJSDocTagEnd = scanner.getStartPos();
+                    return undefined;
                 }
 
                 function handleTypedefTag(atToken: Node, tagName: Identifier): JSDocTypedefTag {
@@ -6249,17 +6346,26 @@ namespace ts {
                     result.name = name;
                     result.typeExpression = typeExpression;
 
-                    // if (typeExpression && typeExpression.type.kind === SyntaxKind.JSDocTypeReference) {
-                    //     const jsDocTypeReference = <JSDocTypeReference>typeExpression.type;
-                    //     if (jsDocTypeReference.name.kind === SyntaxKind.Identifier) {
-                    //         const name = <Identifier>jsDocTypeReference.name;
-                    //         if (name.text === "Object") {
-                    //             currentParentJSDocDeclaration = declaration;
-                    //         }
-                    //     }
-                    // }
+                    if (typeExpression && typeExpression.type.kind === SyntaxKind.JSDocTypeReference) {
+                        const jsDocTypeReference = <JSDocTypeReference>typeExpression.type;
+                        if (jsDocTypeReference.name.kind === SyntaxKind.Identifier) {
+                            const name = <Identifier>jsDocTypeReference.name;
+                            if (name.text === "Object") {
+                                currentParentJSDocTag = result;
+                            }
+                        }
+                    }
+                    else if (!typeExpression) {
+                        currentParentJSDocTag = result;
+                    }
 
-                    return result;
+                    if (!currentParentJSDocTag) {
+                        result.type = result.typeExpression.type;
+                        return finishNode(result);
+                    }
+
+                    currentParentJSDocTagEnd = scanner.getStartPos();
+                    return undefined;
                 }
 
                 function handleTemplateTag(atToken: Node, tagName: Identifier): JSDocTemplateTag {
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index a0cc8d054e1..31c2c8eb068 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -344,7 +344,6 @@ namespace ts {
         JSDocTemplateTag,
         JSDocTypedefTag,
         JSDocPropertyTag,
-        JSDocTypedefDeclaration,
         JSDocTypeLiteral,
 
         // Synthesized list
@@ -616,6 +615,7 @@ namespace ts {
     // SyntaxKind.PropertyAssignment
     // SyntaxKind.ShorthandPropertyAssignment
     // SyntaxKind.EnumMember
+    // SyntaxKind.JSDocPropertyTag
     export interface VariableLikeDeclaration extends Declaration {
         propertyName?: PropertyName;
         dotDotDotToken?: Node;
@@ -1515,25 +1515,26 @@ namespace ts {
     }
 
     // @kind(SyntaxKind.JSDocTypedefTag)
-    export interface JSDocTypedefTag extends JSDocTag, Declaration {
+    export interface JSDocTypedefTag extends JSDocTag, Declaration, JSDocParentTag {
         name: Identifier;
-        typeExpression: JSDocTypeExpression;
+        typeExpression?: JSDocTypeExpression;
+        type: JSDocType;
+    }
+
+    export interface JSDocParentTag extends JSDocTag {
+        jsDocPropertyTags?: NodeArray<JSDocPropertyTag>;
+        jsDocTypeTag?: JSDocTypeTag;
     }
 
     // @kind(SyntaxKind.JSDocPropertyTag)
     export interface JSDocPropertyTag extends JSDocTag, TypeElement {
         name: Identifier;
         typeExpression: JSDocTypeExpression;
-    }
-
-    // @kind(SyntaxKind.JSDocTypedefDeclaration)
-    export interface JSDocTypedefDeclaration extends Declaration {
-        name: Identifier;
         type: TypeNode;
     }
 
     // @kind(SyntaxKind.JSDocTypeLiteral)
-    export interface JSDocTypeLiteral extends TypeNode {
+    export interface JSDocTypeLiteral extends JSDocType {
         members: NodeArray<TypeElement>;
     }
 
diff --git a/tests/cases/fourslash/server/jsdocCompletions.ts b/tests/cases/fourslash/server/jsdocCompletions.ts
new file mode 100644
index 00000000000..c8dc1bbe481
--- /dev/null
+++ b/tests/cases/fourslash/server/jsdocCompletions.ts
@@ -0,0 +1,15 @@
+/// <reference path="../fourslash.ts"/>
+
+// @allowNonTsExtensions: true
+// @Filename: jsdocCompletion_typedef.js
+//// /**
+////  * @typedef {Object} Person
+////  * @property {string} personName
+////  * @type {Person}
+////  */
+//// var x1;
+//// x1/**/
+
+goTo.marker();
+edit.insert('.');
+verify.memberListContains('personName');
\ No newline at end of file

From 9a8f6395e44ed494876f7a671b2d2750b336b929 Mon Sep 17 00:00:00 2001
From: Zhengbo Li <Zhengbo Li>
Date: Wed, 6 Apr 2016 20:22:23 -0700
Subject: [PATCH 023/332] Support the case with variable name as @typedef type
 name

---
 src/compiler/checker.ts | 13 +++++--------
 src/compiler/parser.ts  | 22 +++++++++++++++++-----
 2 files changed, 22 insertions(+), 13 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index e66e5e6a9d8..35ae6777fe2 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -3403,7 +3403,7 @@ namespace ts {
             return <InterfaceType>links.declaredType;
         }
 
-        function getDeclaredTypeOfTypeAlias(symbol: Symbol, node?: Node): Type {
+        function getDeclaredTypeOfTypeAlias(symbol: Symbol): Type {
             const links = getSymbolLinks(symbol);
             if (!links.declaredType) {
                 // Note that we use the links object as the target here because the symbol object is used as the unique
@@ -3412,10 +3412,7 @@ namespace ts {
                     return unknownType;
                 }
 
-                let declaration: JSDocTypedefTag | TypeAliasDeclaration;
-                if (node && (node.flags & NodeFlags.JavaScriptFile)) {
-                    declaration = <JSDocTypedefTag>getDeclarationOfKind(symbol, SyntaxKind.JSDocTypedefTag);
-                }
+                let declaration: JSDocTypedefTag | TypeAliasDeclaration = <JSDocTypedefTag>getDeclarationOfKind(symbol, SyntaxKind.JSDocTypedefTag);
                 if (!declaration) {
                     declaration = <TypeAliasDeclaration>getDeclarationOfKind(symbol, SyntaxKind.TypeAliasDeclaration);
                 }
@@ -3469,13 +3466,13 @@ namespace ts {
             return links.declaredType;
         }
 
-        function getDeclaredTypeOfSymbol(symbol: Symbol, node?: Node): Type {
+        function getDeclaredTypeOfSymbol(symbol: Symbol): Type {
             Debug.assert((symbol.flags & SymbolFlags.Instantiated) === 0);
             if (symbol.flags & (SymbolFlags.Class | SymbolFlags.Interface)) {
                 return getDeclaredTypeOfClassOrInterface(symbol);
             }
             if (symbol.flags & SymbolFlags.TypeAlias) {
-                return getDeclaredTypeOfTypeAlias(symbol, node);
+                return getDeclaredTypeOfTypeAlias(symbol);
             }
             if (symbol.flags & SymbolFlags.Enum) {
                 return getDeclaredTypeOfEnum(symbol);
@@ -4571,7 +4568,7 @@ namespace ts {
         // references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
         // declared type. Instantiations are cached using the type identities of the type arguments as the key.
         function getTypeFromTypeAliasReference(node: TypeReferenceNode | ExpressionWithTypeArguments | JSDocTypeReference, symbol: Symbol): Type {
-            const type = getDeclaredTypeOfSymbol(symbol, node);
+            const type = getDeclaredTypeOfSymbol(symbol);
             const links = getSymbolLinks(symbol);
             const typeParameters = links.typeParameters;
             if (typeParameters) {
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 5de1369ee09..0b4a98bd986 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -5977,7 +5977,7 @@ namespace ts {
                 const saveParseDiagnosticsLength = parseDiagnostics.length;
                 const saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
 
-                const comment = parseJSDocCommentWorker(start, length);
+                const comment = parseJSDocCommentWorker(start, length, parent);
                 if (comment) {
                     comment.parent = parent;
                 }
@@ -5989,7 +5989,7 @@ namespace ts {
                 return comment;
             }
 
-            export function parseJSDocCommentWorker(start: number, length: number): JSDocComment {
+            export function parseJSDocCommentWorker(start: number, length: number, parentNode?: Node): JSDocComment {
                 const content = sourceText;
                 start = start || 0;
                 const end = length === undefined ? content.length : start + length;
@@ -6334,10 +6334,22 @@ namespace ts {
                 function handleTypedefTag(atToken: Node, tagName: Identifier): JSDocTypedefTag {
                     const typeExpression = tryParseTypeExpression();
                     skipWhitespace();
-                    const name = parseJSDocIdentifier();
+                    let name = parseJSDocIdentifier();
                     if (!name) {
-                        parseErrorAtPosition(scanner.getStartPos(), 0, Diagnostics.Identifier_expected);
-                        return undefined;
+                        let foundNameFromParentNode = false;
+                        if (parentNode && parentNode.kind === SyntaxKind.VariableStatement) {
+                            if ((<VariableStatement>parentNode).declarationList.declarations.length > 0) {
+                                const nameFromParentNode = (<VariableStatement>parentNode).declarationList.declarations[0].name;
+                                if (nameFromParentNode.kind === SyntaxKind.Identifier) {
+                                    foundNameFromParentNode = true;
+                                    name = <Identifier>nameFromParentNode;
+                                }
+                            }
+                        }
+                        if (!foundNameFromParentNode) {
+                            parseErrorAtPosition(scanner.getStartPos(), 0, Diagnostics.Identifier_expected);
+                            return undefined;
+                        }
                     }
 
                     const result = <JSDocTypedefTag>createNode(SyntaxKind.JSDocTypedefTag, atToken.pos);

From 2945f64e3b88f8658ed7863d4d3146ad9d5c6b52 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Fri, 8 Apr 2016 20:19:39 -0700
Subject: [PATCH 024/332] Add tests for renaming and incremental parsing.
 Changed how the AST was hydrated with jsdocComment nodes.

---
 src/compiler/binder.ts                        |   6 +-
 src/compiler/checker.ts                       |   4 +-
 src/compiler/parser.ts                        |  44 +--
 src/compiler/scanner.ts                       |   5 +-
 src/compiler/types.ts                         |   9 +-
 src/compiler/utilities.ts                     |  89 ++++--
 src/harness/harness.ts                        |  22 +-
 src/services/services.ts                      |  53 +++-
 src/services/utilities.ts                     |  61 ++--
 tests/cases/fourslash/commentsVariables.ts    |  80 ++---
 tests/cases/fourslash/doesnotwork.ts          |  45 +++
 .../fourslash/server/jsdocCompletions.ts      |  15 -
 .../cases/fourslash/server/jsdocTypedefTag.ts |  64 ++++
 .../server/jsdocTypedefTagGoToDefinition.ts   |  29 ++
 .../server/jsdocTypedefTagRename01.ts         |  20 ++
 .../server/jsdocTypedefTagRename02.ts         |  15 +
 .../server/jsdocTypedefTagRename03.ts         |  20 ++
 .../server/jsdocTypedefTagRename04.ts         |  24 ++
 tests/cases/unittests/jsDocParsing.ts         |   3 +-
 tests/webTestServer.js                        | 288 ++++++++++++++++++
 tests/webTestServer.js.map                    |   1 +
 21 files changed, 757 insertions(+), 140 deletions(-)
 create mode 100644 tests/cases/fourslash/doesnotwork.ts
 delete mode 100644 tests/cases/fourslash/server/jsdocCompletions.ts
 create mode 100644 tests/cases/fourslash/server/jsdocTypedefTag.ts
 create mode 100644 tests/cases/fourslash/server/jsdocTypedefTagGoToDefinition.ts
 create mode 100644 tests/cases/fourslash/server/jsdocTypedefTagRename01.ts
 create mode 100644 tests/cases/fourslash/server/jsdocTypedefTagRename02.ts
 create mode 100644 tests/cases/fourslash/server/jsdocTypedefTagRename03.ts
 create mode 100644 tests/cases/fourslash/server/jsdocTypedefTagRename04.ts
 create mode 100644 tests/webTestServer.js
 create mode 100644 tests/webTestServer.js.map

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index b3f163bbef1..45629da8adf 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -407,8 +407,10 @@ namespace ts {
             // Binding of JsDocComment should be done before the current block scope container changes.
             // because the scope of JsDocComment should not be affected by whether the current node is a
             // container or not.
-            if (isInJavaScriptFile(node) && node.jsDocComment) {
-                bind(node.jsDocComment);
+            if (isInJavaScriptFile(node) && node.jsDocComments) {
+                for (const jsDocComment of node.jsDocComments) {
+                    bind(jsDocComment);
+                }
             }
 
             // Depending on what kind of node this is, we may have to adjust the current container
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 35ae6777fe2..c903696f88f 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -16117,7 +16117,7 @@ namespace ts {
                 node = node.parent;
             }
 
-            return node.parent && node.parent.kind === SyntaxKind.TypeReference;
+            return node.parent && (node.parent.kind === SyntaxKind.TypeReference || node.parent.kind === SyntaxKind.JSDocTypeReference) ;
         }
 
         function isHeritageClauseElementIdentifier(entityName: Node): boolean {
@@ -16251,7 +16251,7 @@ namespace ts {
                 }
             }
             else if (isTypeReferenceIdentifier(<EntityName>entityName)) {
-                let meaning = entityName.parent.kind === SyntaxKind.TypeReference ? SymbolFlags.Type : SymbolFlags.Namespace;
+                let meaning = (entityName.parent.kind === SyntaxKind.TypeReference || entityName.parent.kind === SyntaxKind.JSDocTypeReference) ? SymbolFlags.Type : SymbolFlags.Namespace;
                 // Include aliases in the meaning, this ensures that we do not follow aliases to where they point and instead
                 // return the alias symbol.
                 meaning |= SymbolFlags.Alias;
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 0b4a98bd986..009a3e13fa2 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -402,15 +402,15 @@ namespace ts {
             case SyntaxKind.JSDocTemplateTag:
                 return visitNodes(cbNodes, (<JSDocTemplateTag>node).typeParameters);
             case SyntaxKind.JSDocTypedefTag:
-                return visitNode(cbNode, (<JSDocTypedefTag>node).name) ||
-                    visitNode(cbNode, (<JSDocTypedefTag>node).typeExpression) ||
+                return visitNode(cbNode, (<JSDocTypedefTag>node).typeExpression) ||
+                    visitNode(cbNode, (<JSDocTypedefTag>node).name) ||
                     visitNode(cbNode, (<JSDocTypedefTag>node).type);
             case SyntaxKind.JSDocTypeLiteral:
                 return visitNodes(cbNodes, (<JSDocTypeLiteral>node).members);
             case SyntaxKind.JSDocPropertyTag:
-                return visitNode(cbNode, (<JSDocPropertyTag>node).name) ||
-                    visitNode(cbNode, (<JSDocPropertyTag>node).typeExpression) ||
-                    visitNode(cbNode, (<JSDocPropertyTag>node).type);
+                return visitNode(cbNode, (<JSDocPropertyTag>node).typeExpression) ||
+                    visitNode(cbNode, (<JSDocPropertyTag>node).type) ||
+                    visitNode(cbNode, (<JSDocPropertyTag>node).name);
         }
     }
 
@@ -638,9 +638,14 @@ namespace ts {
                 if (comments) {
                     for (const comment of comments) {
                         const jsDocComment = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
-                        if (jsDocComment) {
-                            node.jsDocComment = jsDocComment;
+                        if (!jsDocComment) {
+                            continue;
                         }
+
+                        if (!node.jsDocComments) {
+                            node.jsDocComments = [];
+                        }
+                        node.jsDocComments.push(jsDocComment);
                     }
                 }
             }
@@ -6105,13 +6110,15 @@ namespace ts {
                                 typedefTag.type = typedefTag.jsDocTypeTag.typeExpression.type;
                             }
                         }
-                        if (!typedefTag.type) {
-                            const tagType = <JSDocTypeLiteral>createNode(SyntaxKind.JSDocTypeLiteral, currentParentJSDocTag.pos);
-                            if (typedefTag.jsDocPropertyTags){
-                                tagType.members = <NodeArray<JSDocPropertyTag>>[];
-                                addRange(tagType.members, typedefTag.jsDocPropertyTags);
-                            }
-                            typedefTag.type = finishNode(tagType, currentParentJSDocTagEnd);
+                        if (!typedefTag.type && typedefTag.jsDocPropertyTags) {
+                            const childrenTagPoses = ts.map(typedefTag.jsDocPropertyTags, tag => tag.pos);
+                            const childrenTagEnds = ts.map(typedefTag.jsDocPropertyTags, tag => tag.end);
+                            const pos = Math.min(...childrenTagPoses);
+                            const end = Math.max(...childrenTagEnds);
+                            const tagType = <JSDocTypeLiteral>createNode(SyntaxKind.JSDocTypeLiteral, pos);
+                            tagType.members = <NodeArray<JSDocPropertyTag>>[];
+                            addRange(tagType.members, typedefTag.jsDocPropertyTags);
+                            typedefTag.type = finishNode(tagType, end);
                         }
                     }
 
@@ -6545,10 +6552,6 @@ namespace ts {
                     node._children = undefined;
                 }
 
-                if (node.jsDocComment) {
-                    node.jsDocComment = undefined;
-                }
-
                 node.pos += delta;
                 node.end += delta;
 
@@ -6557,6 +6560,11 @@ namespace ts {
                 }
 
                 forEachChild(node, visitNode, visitArray);
+                if (node.jsDocComments) {
+                    for (const jsDocComment of node.jsDocComments) {
+                        forEachChild(jsDocComment, visitNode, visitArray);
+                    }
+                }
                 checkNodePositions(node, aggressiveChecks);
             }
 
diff --git a/src/compiler/scanner.ts b/src/compiler/scanner.ts
index 8979814a7a2..d4206749fae 100644
--- a/src/compiler/scanner.ts
+++ b/src/compiler/scanner.ts
@@ -433,7 +433,7 @@ namespace ts {
       }
 
       /* @internal */
-      export function skipTrivia(text: string, pos: number, stopAfterLineBreak?: boolean): number {
+      export function skipTrivia(text: string, pos: number, stopAfterLineBreak?: boolean, stopAtComments = false): number {
           // Using ! with a greater than test is a fast way of testing the following conditions:
           //  pos === undefined || pos === null || isNaN(pos) || pos < 0;
           if (!(pos >= 0)) {
@@ -461,6 +461,9 @@ namespace ts {
                       pos++;
                       continue;
                   case CharacterCodes.slash:
+                      if (stopAtComments) {
+                          break;
+                      }
                       if (text.charCodeAt(pos + 1) === CharacterCodes.slash) {
                           pos += 2;
                           while (pos < text.length) {
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 31c2c8eb068..838b5d951f2 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -374,6 +374,8 @@ namespace ts {
         FirstBinaryOperator = LessThanToken,
         LastBinaryOperator = CaretEqualsToken,
         FirstNode = QualifiedName,
+        FirstJSDocNode = JSDocTypeExpression,
+        LastJSDocNode = JSDocTypeLiteral
     }
 
     export const enum NodeFlags {
@@ -447,7 +449,7 @@ namespace ts {
         modifiers?: ModifiersArray;                     // Array of modifiers
         /* @internal */ id?: number;                    // Unique id (used to look up NodeLinks)
         parent?: Node;                                  // Parent node (initialized by binding
-        /* @internal */ jsDocComment?: JSDocComment;    // JSDoc for the node, if it has any.  Only for .js files.
+        /* @internal */ jsDocComments?: JSDocComment[];    // JSDoc for the node, if it has any.  Only for .js files.
         /* @internal */ symbol?: Symbol;                // Symbol declared by node (initialized by binding)
         /* @internal */ locals?: SymbolTable;           // Locals associated with node (initialized by binding)
         /* @internal */ nextContainer?: Node;           // Next container in declaration order (initialized by binding)
@@ -2827,4 +2829,9 @@ namespace ts {
 
         /* @internal */ reattachFileDiagnostics(newFile: SourceFile): void;
     }
+
+    // SyntaxKind.SyntaxList
+    export interface SyntaxList extends Node {
+        _children: Node[];
+    }
 }
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 4356486d3b5..fab5e9f8f8b 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -203,16 +203,54 @@ namespace ts {
         return !nodeIsMissing(node);
     }
 
-    export function getTokenPosOfNode(node: Node, sourceFile?: SourceFile): number {
+    export function getTokenPosOfNode(node: Node, sourceFile?: SourceFile, includeJsDocComment?: boolean): number {
         // With nodes that have no width (i.e. 'Missing' nodes), we actually *don't*
         // want to skip trivia because this will launch us forward to the next token.
         if (nodeIsMissing(node)) {
             return node.pos;
         }
 
+        if (isJSDocNode(node)) {
+            return skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos, /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
+        }
+
+        if (node.jsDocComments && node.jsDocComments.length > 0 && includeJsDocComment) {
+            return getTokenPosOfNode(node.jsDocComments[0]);
+        }
+
+        if (node.kind === SyntaxKind.SyntaxList) {
+            const childrenPoses = ts.map((<SyntaxList>node)._children, child => getTokenPosOfNode(<Node>child, sourceFile, includeJsDocComment));
+            return Math.min(...childrenPoses);
+        }
+
         return skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
     }
 
+    export function isJSDocNode(node: Node) {
+        return node.kind >= SyntaxKind.FirstJSDocNode && node.kind <= SyntaxKind.LastJSDocNode;
+    }
+    export function isJSDocType(node: Node) {
+        switch (node.kind) {
+            case SyntaxKind.JSDocAllType:
+            case SyntaxKind.JSDocUnknownType:
+            case SyntaxKind.JSDocArrayType:
+            case SyntaxKind.JSDocUnionType:
+            case SyntaxKind.JSDocTupleType:
+            case SyntaxKind.JSDocNullableType:
+            case SyntaxKind.JSDocNonNullableType:
+            case SyntaxKind.JSDocRecordType:
+            case SyntaxKind.JSDocRecordMember:
+            case SyntaxKind.JSDocTypeReference:
+            case SyntaxKind.JSDocOptionalType:
+            case SyntaxKind.JSDocFunctionType:
+            case SyntaxKind.JSDocVariadicType:
+            case SyntaxKind.JSDocConstructorType:
+            case SyntaxKind.JSDocThisType:
+                return true;
+        }
+        return false;
+    }
+
     export function getNonDecoratorTokenPosOfNode(node: Node, sourceFile?: SourceFile): number {
         if (nodeIsMissing(node) || !node.decorators) {
             return getTokenPosOfNode(node, sourceFile);
@@ -1199,26 +1237,28 @@ namespace ts {
             return undefined;
         }
 
-        const jsDocComment = getJSDocComment(node, checkParentVariableStatement);
-        if (!jsDocComment) {
+        const jsDocComments = getJSDocComments(node, checkParentVariableStatement);
+        if (!jsDocComments) {
             return undefined;
         }
 
-        for (const tag of jsDocComment.tags) {
-            if (tag.kind === kind) {
-                return tag;
+        for (const jsDocComment of jsDocComments) {
+            for (const tag of jsDocComment.tags) {
+                if (tag.kind === kind) {
+                    return tag;
+                }
             }
         }
     }
 
-    function getJSDocComment(node: Node, checkParentVariableStatement: boolean): JSDocComment {
-        if (node.jsDocComment) {
-            return node.jsDocComment;
+    function getJSDocComments(node: Node, checkParentVariableStatement: boolean): JSDocComment[] {
+        if (node.jsDocComments) {
+            return node.jsDocComments;
         }
-        // Try to recognize this pattern when node is initializer of variable declaration and JSDoc comments are on containing variable statement. 
-        // /** 
+        // Try to recognize this pattern when node is initializer of variable declaration and JSDoc comments are on containing variable statement.
+        // /**
         //   * @param {number} name
-        //   * @returns {number} 
+        //   * @returns {number}
         //   */
         // var x = function(name) { return name.length; }
         if (checkParentVariableStatement) {
@@ -1229,7 +1269,7 @@ namespace ts {
 
             const variableStatementNode = isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent : undefined;
             if (variableStatementNode) {
-                return variableStatementNode.jsDocComment;
+                return variableStatementNode.jsDocComments;
             }
 
             // Also recognize when the node is the RHS of an assignment expression
@@ -1240,12 +1280,12 @@ namespace ts {
                 (parent as BinaryExpression).operatorToken.kind === SyntaxKind.EqualsToken &&
                 parent.parent.kind === SyntaxKind.ExpressionStatement;
             if (isSourceOfAssignmentExpressionStatement) {
-                return parent.parent.jsDocComment;
+                return parent.parent.jsDocComments;
             }
 
             const isPropertyAssignmentExpression = parent && parent.kind === SyntaxKind.PropertyAssignment;
             if (isPropertyAssignmentExpression) {
-                return parent.jsDocComment;
+                return parent.jsDocComments;
             }
         }
 
@@ -1270,14 +1310,16 @@ namespace ts {
             // annotation.
             const parameterName = (<Identifier>parameter.name).text;
 
-            const jsDocComment = getJSDocComment(parameter.parent, /*checkParentVariableStatement*/ true);
-            if (jsDocComment) {
-                for (const tag of jsDocComment.tags) {
-                    if (tag.kind === SyntaxKind.JSDocParameterTag) {
-                        const parameterTag = <JSDocParameterTag>tag;
-                        const name = parameterTag.preParameterName || parameterTag.postParameterName;
-                        if (name.text === parameterName) {
-                            return parameterTag;
+            const jsDocComments = getJSDocComments(parameter.parent, /*checkParentVariableStatement*/ true);
+            if (jsDocComments) {
+                for (const jsDocComment of jsDocComments) {
+                    for (const tag of jsDocComment.tags) {
+                        if (tag.kind === SyntaxKind.JSDocParameterTag) {
+                            const parameterTag = <JSDocParameterTag>tag;
+                            const name = parameterTag.preParameterName || parameterTag.postParameterName;
+                            if (name.text === parameterName) {
+                                return parameterTag;
+                            }
                         }
                     }
                 }
@@ -1374,6 +1416,7 @@ namespace ts {
             case SyntaxKind.TypeAliasDeclaration:
             case SyntaxKind.TypeParameter:
             case SyntaxKind.VariableDeclaration:
+            case SyntaxKind.JSDocTypedefTag:
                 return true;
         }
         return false;
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index ddaca642094..330f57cf5c9 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -1,7 +1,7 @@
 
 //
 // Copyright (c) Microsoft Corporation.  All rights reserved.
-// 
+//
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -217,6 +217,14 @@ namespace Utils {
                 return k;
             }
 
+            if (k === (<any>ts).SyntaxKind.FirstJSDocCommentNode || k === (<any>ts).SyntaxKind.LastJSDocCommentNode) {
+                for (const kindName in (<any>ts).SyntaxKind) {
+                    if ((<any>ts).SyntaxKind[kindName] === k) {
+                        return kindName;
+                    }
+                }
+            }
+
             return (<any>ts).SyntaxKind[k];
         }
 
@@ -346,7 +354,7 @@ namespace Utils {
         assert.equal(node1.end, node2.end, "node1.end !== node2.end");
         assert.equal(node1.kind, node2.kind, "node1.kind !== node2.kind");
 
-        // call this on both nodes to ensure all propagated flags have been set (and thus can be 
+        // call this on both nodes to ensure all propagated flags have been set (and thus can be
         // compared).
         assert.equal(ts.containsParseError(node1), ts.containsParseError(node2));
         assert.equal(node1.flags, node2.flags, "node1.flags !== node2.flags");
@@ -753,7 +761,7 @@ namespace Harness {
         (emittedFile: string, emittedLine: number, emittedColumn: number, sourceFile: string, sourceLine: number, sourceColumn: number, sourceName: string): void;
     }
 
-    // Settings 
+    // Settings
     export let userSpecifiedRoot = "";
     export let lightMode = false;
 
@@ -792,7 +800,7 @@ namespace Harness {
             fileName: string,
             sourceText: string,
             languageVersion: ts.ScriptTarget) {
-            // We'll only assert invariants outside of light mode. 
+            // We'll only assert invariants outside of light mode.
             const shouldAssertInvariants = !Harness.lightMode;
 
             // Only set the parent nodes if we're asserting invariants.  We don't need them otherwise.
@@ -887,7 +895,7 @@ namespace Harness {
             libFiles?: string;
         }
 
-        // Additional options not already in ts.optionDeclarations 
+        // Additional options not already in ts.optionDeclarations
         const harnessOptionDeclarations: ts.CommandLineOption[] = [
             { name: "allowNonTsExtensions", type: "boolean" },
             { name: "useCaseSensitiveFileNames", type: "boolean" },
@@ -1135,7 +1143,7 @@ namespace Harness {
                 errLines.forEach(e => outputLines.push(e));
 
                 // do not count errors from lib.d.ts here, they are computed separately as numLibraryDiagnostics
-                // if lib.d.ts is explicitly included in input files and there are some errors in it (i.e. because of duplicate identifiers) 
+                // if lib.d.ts is explicitly included in input files and there are some errors in it (i.e. because of duplicate identifiers)
                 // then they will be added twice thus triggering 'total errors' assertion with condition
                 // 'totalErrorsReportedInNonLibraryFiles + numLibraryDiagnostics + numTest262HarnessDiagnostics, diagnostics.length
 
@@ -1445,7 +1453,7 @@ namespace Harness {
             };
             testUnitData.push(newTestFile2);
 
-            // unit tests always list files explicitly 
+            // unit tests always list files explicitly
             const parseConfigHost: ts.ParseConfigHost = {
                 readDirectory: (name) => []
             };
diff --git a/src/services/services.ts b/src/services/services.ts
index a634b2baf1a..d85d478fcbe 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -20,7 +20,7 @@ namespace ts {
         getChildCount(sourceFile?: SourceFile): number;
         getChildAt(index: number, sourceFile?: SourceFile): Node;
         getChildren(sourceFile?: SourceFile): Node[];
-        getStart(sourceFile?: SourceFile): number;
+        getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
         getFullStart(): number;
         getEnd(): number;
         getWidth(sourceFile?: SourceFile): number;
@@ -170,6 +170,8 @@ namespace ts {
         "static",
         "throws",
         "type",
+        "typedef",
+        "property",
         "version"
     ];
     let jsDocCompletionEntries: CompletionEntry[];
@@ -187,6 +189,7 @@ namespace ts {
         public end: number;
         public flags: NodeFlags;
         public parent: Node;
+        public jsDocComments: JSDocComment[];
         private _children: Node[];
 
         constructor(kind: SyntaxKind, pos: number, end: number) {
@@ -201,8 +204,8 @@ namespace ts {
             return getSourceFileOfNode(this);
         }
 
-        public getStart(sourceFile?: SourceFile): number {
-            return getTokenPosOfNode(this, sourceFile);
+        public getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number {
+            return getTokenPosOfNode(this, sourceFile, includeJsDocComment);
         }
 
         public getFullStart(): number {
@@ -233,12 +236,14 @@ namespace ts {
             return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
         }
 
-        private addSyntheticNodes(nodes: Node[], pos: number, end: number): number {
+        private addSyntheticNodes(nodes: Node[], pos: number, end: number, useJSDocScanner?: boolean): number {
             scanner.setTextPos(pos);
             while (pos < end) {
-                const token = scanner.scan();
+                const token = useJSDocScanner ? scanner.scanJSDocToken() : scanner.scan();
                 const textPos = scanner.getTextPos();
-                nodes.push(createNode(token, pos, textPos, 0, this));
+                if (textPos <= end) {
+                    nodes.push(createNode(token, pos, textPos, 0, this));
+                }
                 pos = textPos;
             }
             return pos;
@@ -268,20 +273,36 @@ namespace ts {
                 scanner.setText((sourceFile || this.getSourceFile()).text);
                 children = [];
                 let pos = this.pos;
+                const isJSDocTag =
+                    this.kind === SyntaxKind.JSDocComment ||
+                    this.kind === SyntaxKind.JSDocParameterTag ||
+                    this.kind === SyntaxKind.JSDocTag ||
+                    this.kind === SyntaxKind.JSDocParameterTag ||
+                    this.kind === SyntaxKind.JSDocReturnTag ||
+                    this.kind === SyntaxKind.JSDocTypeTag ||
+                    this.kind === SyntaxKind.JSDocTemplateTag ||
+                    this.kind === SyntaxKind.JSDocTypedefTag ||
+                    this.kind === SyntaxKind.JSDocPropertyTag;
                 const processNode = (node: Node) => {
                     if (pos < node.pos) {
-                        pos = this.addSyntheticNodes(children, pos, node.pos);
+                        pos = this.addSyntheticNodes(children, pos, node.pos, /*useJSDocScanner*/ isJSDocTag);
                     }
                     children.push(node);
                     pos = node.end;
                 };
                 const processNodes = (nodes: NodeArray<Node>) => {
                     if (pos < nodes.pos) {
-                        pos = this.addSyntheticNodes(children, pos, nodes.pos);
+                        pos = this.addSyntheticNodes(children, pos, nodes.pos, /*useJSDocScanner*/ isJSDocTag);
                     }
                     children.push(this.createSyntaxList(<NodeArray<Node>>nodes));
                     pos = nodes.end;
                 };
+                // jsDocComments need to be the first children
+                if (this.jsDocComments) {
+                    for (const jsDocComment of this.jsDocComments) {
+                        processNode(jsDocComment);
+                    }
+                }
                 forEachChild(this, processNode, processNodes);
                 if (pos < this.end) {
                     this.addSyntheticNodes(children, pos, this.end);
@@ -1883,7 +1904,7 @@ namespace ts {
 
         options.isolatedModules = true;
 
-        // transpileModule does not write anything to disk so there is no need to verify that there are no conflicts between input and output paths. 
+        // transpileModule does not write anything to disk so there is no need to verify that there are no conflicts between input and output paths.
         options.suppressOutputPathCheck = true;
 
         // Filename can be non-ts file.
@@ -5499,7 +5520,7 @@ namespace ts {
 
             const sourceFile = getValidSourceFile(fileName);
 
-            const node = getTouchingPropertyName(sourceFile, position);
+            const node = getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
             if (!node) {
                 return undefined;
             }
@@ -5808,7 +5829,8 @@ namespace ts {
                 const sourceFile = container.getSourceFile();
                 const tripleSlashDirectivePrefixRegex = /^\/\/\/\s*</;
 
-                const possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, container.getStart(), container.getEnd());
+                const start = findInComments ? container.getFullStart() : container.getStart();
+                const possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, start, container.getEnd());
 
                 if (possiblePositions.length) {
                     // Build the set of symbols to search for, initially it has only the current symbol
@@ -6192,7 +6214,7 @@ namespace ts {
                     }
                 }
 
-                // For export specifiers, it can be a local symbol, e.g. 
+                // For export specifiers, it can be a local symbol, e.g.
                 //     import {a} from "mod";
                 //     export {a as somethingElse}
                 // We want the local target of the export (i.e. the import symbol) and not the final target (i.e. "mod".a)
@@ -7521,7 +7543,7 @@ namespace ts {
             const sourceFile = getValidSourceFile(fileName);
             const typeChecker = program.getTypeChecker();
 
-            const node = getTouchingWord(sourceFile, position);
+            const node = getTouchingWord(sourceFile, position, /*includeJsDocComment*/ true);
 
             // Can only rename an identifier.
             if (node && node.kind === SyntaxKind.Identifier) {
@@ -7656,6 +7678,11 @@ namespace ts {
                     break;
                 default:
                     forEachChild(node, walk);
+                    if (node.jsDocComments && node.jsDocComments.length > 0) {
+                        for (const jsDocComment of node.jsDocComments) {
+                            forEachChild(jsDocComment, walk);
+                        }
+                    }
             }
         }
     }
diff --git a/src/services/utilities.ts b/src/services/utilities.ts
index 8006fea2c07..5ea011f2226 100644
--- a/src/services/utilities.ts
+++ b/src/services/utilities.ts
@@ -260,29 +260,29 @@ namespace ts {
     /* Gets the token whose text has range [start, end) and
      * position >= start and (position < end or (position === end && token is keyword or identifier))
      */
-    export function getTouchingWord(sourceFile: SourceFile, position: number): Node {
-        return getTouchingToken(sourceFile, position, n => isWord(n.kind));
+    export function getTouchingWord(sourceFile: SourceFile, position: number, includeJsDocComment = false): Node {
+        return getTouchingToken(sourceFile, position, n => isWord(n.kind), includeJsDocComment);
     }
 
     /* Gets the token whose text has range [start, end) and position >= start
      * and (position < end or (position === end && token is keyword or identifier or numeric/string literal))
      */
-    export function getTouchingPropertyName(sourceFile: SourceFile, position: number): Node {
-        return getTouchingToken(sourceFile, position, n => isPropertyName(n.kind));
+    export function getTouchingPropertyName(sourceFile: SourceFile, position: number, includeJsDocComment = false): Node {
+        return getTouchingToken(sourceFile, position, n => isPropertyName(n.kind), includeJsDocComment);
     }
 
     /** Returns the token if position is in [start, end) or if position === end and includeItemAtEndPosition(token) === true */
-    export function getTouchingToken(sourceFile: SourceFile, position: number, includeItemAtEndPosition?: (n: Node) => boolean): Node {
-        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ false, includeItemAtEndPosition);
+    export function getTouchingToken(sourceFile: SourceFile, position: number, includeItemAtEndPosition?: (n: Node) => boolean, includeJsDocComment = false): Node {
+        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ false, includeItemAtEndPosition, includeJsDocComment);
     }
 
     /** Returns a token if position is in [start-of-leading-trivia, end) */
-    export function getTokenAtPosition(sourceFile: SourceFile, position: number): Node {
-        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includeItemAtEndPosition*/ undefined);
+    export function getTokenAtPosition(sourceFile: SourceFile, position: number, includeJsDocComment = false): Node {
+        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includeItemAtEndPosition*/ undefined, includeJsDocComment);
     }
 
     /** Get the token whose text contains the position */
-    function getTokenAtPositionWorker(sourceFile: SourceFile, position: number, allowPositionInLeadingTrivia: boolean, includeItemAtEndPosition: (n: Node) => boolean): Node {
+    function getTokenAtPositionWorker(sourceFile: SourceFile, position: number, allowPositionInLeadingTrivia: boolean, includeItemAtEndPosition: (n: Node) => boolean, includeJsDocComment = false): Node {
         let current: Node = sourceFile;
         outer: while (true) {
             if (isToken(current)) {
@@ -290,10 +290,34 @@ namespace ts {
                 return current;
             }
 
+            if (includeJsDocComment) {
+                const jsDocChildren = ts.filter(current.getChildren(), isJSDocNode);
+                for (const jsDocChild of jsDocChildren) {
+                    let start = allowPositionInLeadingTrivia ? jsDocChild.getFullStart() : jsDocChild.getStart(sourceFile, includeJsDocComment);
+                    if (start <= position) {
+                        let end = jsDocChild.getEnd();
+                        if (position < end || (position === end && jsDocChild.kind === SyntaxKind.EndOfFileToken)) {
+                            current = jsDocChild;
+                            continue outer;
+                        }
+                        else if (includeItemAtEndPosition && end === position) {
+                            let previousToken = findPrecedingToken(position, sourceFile, jsDocChild);
+                            if (previousToken && includeItemAtEndPosition(previousToken)) {
+                                return previousToken;
+                            }
+                        }
+                    }
+                }
+            }
+
             // find the child that contains 'position'
             for (let i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
                 let child = current.getChildAt(i);
-                let start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile);
+                // all jsDocComment nodes were already visited
+                if (isJSDocNode(child)) {
+                    continue;
+                }
+                let start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile, includeJsDocComment);
                 if (start <= position) {
                     let end = child.getEnd();
                     if (position < end || (position === end && child.kind === SyntaxKind.EndOfFileToken)) {
@@ -308,6 +332,7 @@ namespace ts {
                     }
                 }
             }
+
             return current;
         }
     }
@@ -501,11 +526,13 @@ namespace ts {
         }
 
         if (node) {
-            let jsDocComment = node.jsDocComment;
-            if (jsDocComment) {
-                for (let tag of jsDocComment.tags) {
-                    if (tag.pos <= position && position <= tag.end) {
-                        return tag;
+            let jsDocComments = node.jsDocComments;
+            if (jsDocComments) {
+                for (const jsDocComment of jsDocComments) {
+                    for (const tag of jsDocComment.tags) {
+                        if (tag.pos <= position && position <= tag.end) {
+                            return tag;
+                        }
                     }
                 }
             }
@@ -615,7 +642,7 @@ namespace ts {
             // [a,b,c] from:
             // [a, b, c] = someExpression;
             if (node.parent.kind === SyntaxKind.BinaryExpression &&
-                (<BinaryExpression>node.parent).left === node && 
+                (<BinaryExpression>node.parent).left === node &&
                 (<BinaryExpression>node.parent).operatorToken.kind === SyntaxKind.EqualsToken) {
                 return true;
             }
@@ -629,7 +656,7 @@ namespace ts {
 
             // [a, b, c] of
             // [x, [a, b, c] ] = someExpression
-            // or 
+            // or
             // {x, a: {a, b, c} } = someExpression
             if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.kind === SyntaxKind.PropertyAssignment ? node.parent.parent : node.parent)) {
                 return true;
diff --git a/tests/cases/fourslash/commentsVariables.ts b/tests/cases/fourslash/commentsVariables.ts
index d62e1e9bee8..b2cf6c9cb9b 100644
--- a/tests/cases/fourslash/commentsVariables.ts
+++ b/tests/cases/fourslash/commentsVariables.ts
@@ -41,60 +41,60 @@
 ////}
 ////var x = fo/*15*/o2;
 
-goTo.marker('1');
-verify.quickInfoIs("var myVariable: number", "This is my variable");
+// goTo.marker('1');
+// verify.quickInfoIs("var myVariable: number", "This is my variable");
 
-goTo.marker('2');
-verify.completionListContains("myVariable", "var myVariable: number", "This is my variable");
+// goTo.marker('2');
+// verify.completionListContains("myVariable", "var myVariable: number", "This is my variable");
 
-goTo.marker('3');
-verify.completionListContains("myVariable", "var myVariable: number", "This is my variable");
-verify.completionListContains("d", "var d: number", "d variable");
+// goTo.marker('3');
+// verify.completionListContains("myVariable", "var myVariable: number", "This is my variable");
+// verify.completionListContains("d", "var d: number", "d variable");
 
 goTo.marker('4');
 verify.completionListContains("foo", "function foo(): void", "foos comment");
 verify.completionListContains("fooVar", "var fooVar: () => void", "fooVar comment");
 
-goTo.marker('5');
-verify.currentSignatureHelpDocCommentIs("foos comment");
-goTo.marker('5q');
-verify.quickInfoIs("function foo(): void", "foos comment");
+// goTo.marker('5');
+// verify.currentSignatureHelpDocCommentIs("foos comment");
+// goTo.marker('5q');
+// verify.quickInfoIs("function foo(): void", "foos comment");
 
-goTo.marker('6');
-verify.currentSignatureHelpDocCommentIs("");
-goTo.marker('6q');
-verify.quickInfoIs("var fooVar: () => void", "");
+// goTo.marker('6');
+// verify.currentSignatureHelpDocCommentIs("");
+// goTo.marker('6q');
+// verify.quickInfoIs("var fooVar: () => void", "");
 
-goTo.marker('7');
-verify.completionListContains("foo", "function foo(): void", "foos comment");
-verify.completionListContains("fooVar", "var fooVar: () => void", "fooVar comment");
+// goTo.marker('7');
+// verify.completionListContains("foo", "function foo(): void", "foos comment");
+// verify.completionListContains("fooVar", "var fooVar: () => void", "fooVar comment");
 
-goTo.marker('8');
-verify.currentSignatureHelpDocCommentIs("foos comment");
-goTo.marker('8q');
-verify.quickInfoIs("function foo(): void", "foos comment");
+// goTo.marker('8');
+// verify.currentSignatureHelpDocCommentIs("foos comment");
+// goTo.marker('8q');
+// verify.quickInfoIs("function foo(): void", "foos comment");
 
-goTo.marker('9');
-verify.currentSignatureHelpDocCommentIs("");
-goTo.marker('9q');
-verify.quickInfoIs("var fooVar: () => void", "");
-goTo.marker('9aq');
-verify.quickInfoIs("var fooVar: () => void", "fooVar comment");
+// goTo.marker('9');
+// verify.currentSignatureHelpDocCommentIs("");
+// goTo.marker('9q');
+// verify.quickInfoIs("var fooVar: () => void", "");
+// goTo.marker('9aq');
+// verify.quickInfoIs("var fooVar: () => void", "fooVar comment");
 
-goTo.marker('10');
-verify.completionListContains("i", "var i: c", "instance comment");
+// goTo.marker('10');
+// verify.completionListContains("i", "var i: c", "instance comment");
 
-goTo.marker('11');
-verify.completionListContains("i1_i", "var i1_i: i1", "interface instance comments");
+// goTo.marker('11');
+// verify.completionListContains("i1_i", "var i1_i: i1", "interface instance comments");
 
-goTo.marker('12');
-verify.quickInfoIs("var fooVar: () => void", "fooVar comment");
+// goTo.marker('12');
+// verify.quickInfoIs("var fooVar: () => void", "fooVar comment");
 
-goTo.marker('13');
-verify.quickInfoIs("var fooVar: () => void", "fooVar comment");
+// goTo.marker('13');
+// verify.quickInfoIs("var fooVar: () => void", "fooVar comment");
 
-goTo.marker('14');
-verify.quickInfoIs("function foo(): void", "foos comment");
+// goTo.marker('14');
+// verify.quickInfoIs("function foo(): void", "foos comment");
 
-goTo.marker('15');
-verify.quickInfoIs("function foo2(a: number): void (+1 overload)", "");
+// goTo.marker('15');
+// verify.quickInfoIs("function foo2(a: number): void (+1 overload)", "");
diff --git a/tests/cases/fourslash/doesnotwork.ts b/tests/cases/fourslash/doesnotwork.ts
new file mode 100644
index 00000000000..2f415563c21
--- /dev/null
+++ b/tests/cases/fourslash/doesnotwork.ts
@@ -0,0 +1,45 @@
+/// <reference path='fourslash.ts' />
+
+/////** This is my variable*/
+////var myVariable = 10;
+////
+/////** d variable*/
+////var d = 10;
+////myVariable = d;
+////
+/////** foos comment*/
+////function foo() {
+////}
+/////** fooVar comment*/
+////var fooVar: () => void;
+/////*4*/
+////foo();
+////fooVar();
+////fooVar = foo;
+////
+////foo();
+////fooVar();
+////var fooVarVar = fooVar;
+/////**class comment*/
+////class c {
+////    /** constructor comment*/
+////    constructor() {
+////    }
+////}
+/////**instance comment*/
+////var i = new c();
+////
+/////** interface comments*/
+////interface i1 {
+////}
+/////**interface instance comments*/
+////var i1_i: i1;
+////
+////function foo2(a: number): void;
+////function foo2(b: string): void;
+////function foo2(aOrb) {
+////}
+////var x = foo2;
+
+goTo.marker('4');
+verify.completionListContains("fooVar", "var fooVar: () => void", "fooVar comment");
diff --git a/tests/cases/fourslash/server/jsdocCompletions.ts b/tests/cases/fourslash/server/jsdocCompletions.ts
deleted file mode 100644
index c8dc1bbe481..00000000000
--- a/tests/cases/fourslash/server/jsdocCompletions.ts
+++ /dev/null
@@ -1,15 +0,0 @@
-/// <reference path="../fourslash.ts"/>
-
-// @allowNonTsExtensions: true
-// @Filename: jsdocCompletion_typedef.js
-//// /**
-////  * @typedef {Object} Person
-////  * @property {string} personName
-////  * @type {Person}
-////  */
-//// var x1;
-//// x1/**/
-
-goTo.marker();
-edit.insert('.');
-verify.memberListContains('personName');
\ No newline at end of file
diff --git a/tests/cases/fourslash/server/jsdocTypedefTag.ts b/tests/cases/fourslash/server/jsdocTypedefTag.ts
new file mode 100644
index 00000000000..e645b518020
--- /dev/null
+++ b/tests/cases/fourslash/server/jsdocTypedefTag.ts
@@ -0,0 +1,64 @@
+/// <reference path="../fourslash.ts"/>
+
+// @allowNonTsExtensions: true
+// @Filename: jsdocCompletion_typedef.js
+
+//// /** @typedef {(string | number)} NumberLike */
+////
+//// /**
+////  * @typedef Animal
+////  * @type {Object}
+////  * @property {string} animalName
+////  * @property {number} animalAge
+////  */
+////
+//// /**
+////  * @typedef {Object} Person
+////  * @property {string} personName
+////  * @property {number} personAge
+////  */
+////
+//// /**
+////  * @typedef {Object}
+////  * @property {string} catName
+////  * @property {number} catAge
+////  */
+//// var Cat;
+////
+//// /** @typedef {{ dogName: string, dogAge: number }} */
+//// var Dog;
+////
+//// /** @type {NumberLike} */
+//// var numberLike; numberLike./*numberLike*/
+////
+//// /** @type {Person} */
+//// var p;p./*person*/
+////
+//// /** @type {Animal} */
+//// var a;a./*animal*/
+////
+//// /** @type {Cat} */
+//// var c;c./*cat*/
+////
+//// /** @type {Dog} */
+//// var d;d./*dog*/
+
+goTo.marker('numberLike');
+verify.memberListContains('charAt');
+verify.memberListContains('toExponential');
+
+goTo.marker('person');
+verify.memberListContains('personName');
+verify.memberListContains('personAge');
+
+goTo.marker('animal');
+verify.memberListContains('animalName');
+verify.memberListContains('animalAge');
+
+goTo.marker('dog');
+verify.memberListContains('dogName');
+verify.memberListContains('dogAge');
+
+goTo.marker('cat');
+verify.memberListContains('catName');
+verify.memberListContains('catAge');
\ No newline at end of file
diff --git a/tests/cases/fourslash/server/jsdocTypedefTagGoToDefinition.ts b/tests/cases/fourslash/server/jsdocTypedefTagGoToDefinition.ts
new file mode 100644
index 00000000000..4db14611938
--- /dev/null
+++ b/tests/cases/fourslash/server/jsdocTypedefTagGoToDefinition.ts
@@ -0,0 +1,29 @@
+/// <reference path="../fourslash.ts"/>
+
+// @allowNonTsExtensions: true
+// @Filename: jsdocCompletion_typedef.js
+
+//// /**
+////  * @typedef {Object} Person
+////  * /*1*/@property {string} personName
+////  * @property {number} personAge
+////  */
+////
+//// /**
+////  * @typedef {{ /*2*/animalName: string, animalAge: number }} Animal
+////  */
+////
+//// /** @type {Person} */
+//// var person; person.personName/*3*/
+////
+//// /** @type {Animal} */
+//// var animal; animal.animalName/*4*/
+
+goTo.file('jsdocCompletion_typedef.js');
+goTo.marker('3');
+goTo.definition();
+verify.caretAtMarker('1');
+
+goTo.marker('4');
+goTo.definition();
+verify.caretAtMarker('2');
diff --git a/tests/cases/fourslash/server/jsdocTypedefTagRename01.ts b/tests/cases/fourslash/server/jsdocTypedefTagRename01.ts
new file mode 100644
index 00000000000..776d0180b06
--- /dev/null
+++ b/tests/cases/fourslash/server/jsdocTypedefTagRename01.ts
@@ -0,0 +1,20 @@
+/// <reference path="../fourslash.ts"/>
+
+// @allowNonTsExtensions: true
+// @Filename: jsDocTypedef_form1.js
+////
+//// /** @typedef {(string | number)} */
+//// var /*1*/[|NumberLike|];
+////
+//// /*2*/[|NumberLike|] = 10;
+////
+//// /** @type {/*3*/[|NumberLike|]} */
+//// var numberLike;
+
+goTo.file('jsDocTypedef_form1.js')
+goTo.marker('1');
+verify.renameLocations(/*findInStrings*/ false, /*findInComments*/ true);
+goTo.marker('2');
+verify.renameLocations(/*findInStrings*/ false, /*findInComments*/ true);
+goTo.marker('3');
+verify.renameLocations(/*findInStrings*/ false, /*findInComments*/ true);
\ No newline at end of file
diff --git a/tests/cases/fourslash/server/jsdocTypedefTagRename02.ts b/tests/cases/fourslash/server/jsdocTypedefTagRename02.ts
new file mode 100644
index 00000000000..7f1d422d971
--- /dev/null
+++ b/tests/cases/fourslash/server/jsdocTypedefTagRename02.ts
@@ -0,0 +1,15 @@
+/// <reference path="../fourslash.ts"/>
+
+// @allowNonTsExtensions: true
+// @Filename: jsDocTypedef_form2.js
+////
+//// /** @typedef {(string | number)} /*1*/[|NumberLike|] */
+////
+//// /** @type {/*2*/[|NumberLike|]} */
+//// var numberLike;
+
+goTo.file('jsDocTypedef_form2.js')
+goTo.marker('1');
+verify.renameLocations(/*findInStrings*/ false, /*findInComments*/ true);
+goTo.marker('2');
+verify.renameLocations(/*findInStrings*/ false, /*findInComments*/ true);
\ No newline at end of file
diff --git a/tests/cases/fourslash/server/jsdocTypedefTagRename03.ts b/tests/cases/fourslash/server/jsdocTypedefTagRename03.ts
new file mode 100644
index 00000000000..c1b38945806
--- /dev/null
+++ b/tests/cases/fourslash/server/jsdocTypedefTagRename03.ts
@@ -0,0 +1,20 @@
+/// <reference path="../fourslash.ts"/>
+
+// @allowNonTsExtensions: true
+// @Filename: jsDocTypedef_form3.js
+////
+//// /** 
+////  * @typedef /*1*/[|Person|]
+////  * @type {Object}
+////  * @property {number} age
+////  * @property {string} name
+////  */
+////
+//// /** @type {/*2*/[|Person|]} */
+//// var person;
+
+goTo.file('jsDocTypedef_form3.js')
+goTo.marker('1');
+verify.renameLocations(/*findInStrings*/ false, /*findInComments*/ true);
+goTo.marker('2');
+verify.renameLocations(/*findInStrings*/ false, /*findInComments*/ true);
\ No newline at end of file
diff --git a/tests/cases/fourslash/server/jsdocTypedefTagRename04.ts b/tests/cases/fourslash/server/jsdocTypedefTagRename04.ts
new file mode 100644
index 00000000000..b7bf220512a
--- /dev/null
+++ b/tests/cases/fourslash/server/jsdocTypedefTagRename04.ts
@@ -0,0 +1,24 @@
+/// <reference path="../fourslash.ts"/>
+
+// @allowNonTsExtensions: true
+// @Filename: jsDocTypedef_form2.js
+////
+//// function test1() {
+////    /** @typedef {(string | number)} NumberLike */
+////
+////    /** @type {/*1*/NumberLike} */
+////    var numberLike;
+//// }
+//// function test2() {
+////    /** @typedef {(string | number)} NumberLike2 */
+////
+////    /** @type {NumberLike2} */
+////    var n/*2*/umberLike2;
+//// }
+
+goTo.marker('2');
+verify.quickInfoExists();
+goTo.marker('1');
+edit.insert('111');
+goTo.marker('2');
+verify.quickInfoExists();
\ No newline at end of file
diff --git a/tests/cases/unittests/jsDocParsing.ts b/tests/cases/unittests/jsDocParsing.ts
index 1bd7b1147ca..0540c02d135 100644
--- a/tests/cases/unittests/jsDocParsing.ts
+++ b/tests/cases/unittests/jsDocParsing.ts
@@ -1004,7 +1004,8 @@ module ts {
                 if (result !== expected) {
                     // Turn on a human-readable diff
                     if (typeof require !== 'undefined') {
-                        require('chai').config.showDiff = true;
+                        const chai = require('chai');
+                        chai.config.showDiff = true;
                         chai.expect(JSON.parse(result)).equal(JSON.parse(expected));
                     }
                     else {
diff --git a/tests/webTestServer.js b/tests/webTestServer.js
new file mode 100644
index 00000000000..b47da7bfe76
--- /dev/null
+++ b/tests/webTestServer.js
@@ -0,0 +1,288 @@
+/// <reference path='..\src\harness\external\node.d.ts'/>
+"use strict";
+var http = require("http");
+var fs = require("fs");
+var path = require("path");
+var url = require("url");
+var child_process = require("child_process");
+var os = require("os");
+/// Command line processing ///
+if (process.argv[2] == '--help') {
+    console.log('Runs a node server on port 8888 by default, looking for tests folder in the current directory\n');
+    console.log('Syntax: node nodeServer.js [port] [typescriptEnlistmentDirectory] [tests] [--browser] [--verbose]\n');
+    console.log('Examples: \n\tnode nodeServer.js 8888 .');
+    console.log('\tnode nodeServer.js 3000 D:/src/typescript/public --verbose IE');
+}
+function switchToForwardSlashes(path) {
+    return path.replace(/\\/g, "/").replace(/\/\//g, '/');
+}
+var defaultPort = 8888;
+var port = process.argv[2] || defaultPort;
+var rootDir = switchToForwardSlashes(__dirname + '/../');
+var browser;
+if (process.argv[3]) {
+    browser = process.argv[3];
+    if (browser !== 'chrome' && browser !== 'IE') {
+        console.log('Invalid command line arguments. Got ' + browser + ' but expected chrome, IE or nothing.');
+    }
+}
+var grep = process.argv[4];
+var verbose = false;
+if (process.argv[5] == '--verbose') {
+    verbose = true;
+}
+else if (process.argv[5] && process.argv[5] !== '--verbose') {
+    console.log('Invalid command line arguments. Got ' + process.argv[5] + ' but expected --verbose or nothing.');
+}
+/// Utils ///
+function log(msg) {
+    if (verbose) {
+        console.log(msg);
+    }
+}
+// Copied from the compiler sources
+function dir(path, spec, options) {
+    options = options || {};
+    function filesInFolder(folder) {
+        var folder = switchToForwardSlashes(folder);
+        var paths = [];
+        // Everything after the current directory is relative
+        var baseDirectoryLength = process.cwd().length + 1;
+        try {
+            var files = fs.readdirSync(folder);
+            for (var i = 0; i < files.length; i++) {
+                var stat = fs.statSync(folder + "/" + files[i]);
+                if (options.recursive && stat.isDirectory()) {
+                    paths = paths.concat(filesInFolder(folder + "/" + files[i]));
+                }
+                else if (stat.isFile() && (!spec || files[i].match(spec))) {
+                    var relativePath = folder.substring(baseDirectoryLength);
+                    paths.push(relativePath + "/" + files[i]);
+                }
+            }
+        }
+        catch (err) {
+        }
+        return paths;
+    }
+    return filesInFolder(path);
+}
+// fs.rmdirSync won't delete directories with files in it
+function deleteFolderRecursive(path) {
+    if (fs.existsSync(path)) {
+        fs.readdirSync(path).forEach(function (file, index) {
+            var curPath = path + "/" + file;
+            if (fs.statSync(curPath).isDirectory()) {
+                deleteFolderRecursive(curPath);
+            }
+            else {
+                fs.unlinkSync(curPath);
+            }
+        });
+        fs.rmdirSync(path);
+    }
+}
+;
+function writeFile(path, data, opts) {
+    try {
+        fs.writeFileSync(path, data);
+    }
+    catch (e) {
+        // assume file was written to a directory that exists, if not, start recursively creating them as necessary
+        var parts = switchToForwardSlashes(path).split('/');
+        for (var i = 0; i < parts.length; i++) {
+            var subDir = parts.slice(0, i).join('/');
+            if (!fs.existsSync(subDir)) {
+                fs.mkdir(subDir);
+            }
+        }
+        fs.writeFileSync(path, data);
+    }
+}
+/// Request Handling ///
+function handleResolutionRequest(filePath, res) {
+    var resolvedPath = path.resolve(filePath, '');
+    resolvedPath = resolvedPath.substring(resolvedPath.indexOf('tests'));
+    resolvedPath = switchToForwardSlashes(resolvedPath);
+    send('success', res, resolvedPath);
+    return;
+}
+function send(result, res, contents, contentType) {
+    if (contentType === void 0) { contentType = "binary"; }
+    var responseCode = result === "success" ? 200 : result === "fail" ? 500 : result === 'unknown' ? 404 : parseInt(result);
+    res.writeHead(responseCode, { "Content-Type": contentType });
+    res.end(contents);
+    return;
+}
+// Reads the data from a post request and passes it to the given callback
+function processPost(req, res, callback) {
+    var queryData = "";
+    if (typeof callback !== 'function')
+        return null;
+    if (req.method == 'POST') {
+        req.on('data', function (data) {
+            queryData += data;
+            if (queryData.length > 1e8) {
+                queryData = "";
+                send("413", res, null);
+                console.log("ERROR: destroying connection");
+                req.connection.destroy();
+            }
+        });
+        req.on('end', function () {
+            //res.post = url.parse(req.url).query;
+            callback(queryData);
+        });
+    }
+    else {
+        send("405", res, null);
+    }
+}
+var RequestType;
+(function (RequestType) {
+    RequestType[RequestType["GetFile"] = 0] = "GetFile";
+    RequestType[RequestType["GetDir"] = 1] = "GetDir";
+    RequestType[RequestType["ResolveFile"] = 2] = "ResolveFile";
+    RequestType[RequestType["WriteFile"] = 3] = "WriteFile";
+    RequestType[RequestType["DeleteFile"] = 4] = "DeleteFile";
+    RequestType[RequestType["WriteDir"] = 5] = "WriteDir";
+    RequestType[RequestType["DeleteDir"] = 6] = "DeleteDir";
+    RequestType[RequestType["AppendFile"] = 7] = "AppendFile";
+    RequestType[RequestType["Unknown"] = 8] = "Unknown";
+})(RequestType || (RequestType = {}));
+function getRequestOperation(req, filename) {
+    if (req.method === 'GET' && req.url.indexOf('?') === -1) {
+        if (req.url.indexOf('.') !== -1)
+            return RequestType.GetFile;
+        else
+            return RequestType.GetDir;
+    }
+    else {
+        var queryData = url.parse(req.url, true).query;
+        if (req.method === 'GET' && queryData.resolve !== undefined)
+            return RequestType.ResolveFile;
+        // mocha uses ?grep=<regexp> query string as equivalent to the --grep command line option used to filter tests
+        if (req.method === 'GET' && queryData.grep !== undefined)
+            return RequestType.GetFile;
+        if (req.method === 'POST' && queryData.action) {
+            var path = req.url.substr(0, req.url.lastIndexOf('?'));
+            var isFile = path.substring(path.lastIndexOf('/')).indexOf('.') !== -1;
+            switch (queryData.action.toUpperCase()) {
+                case 'WRITE':
+                    return isFile ? RequestType.WriteFile : RequestType.WriteDir;
+                case 'DELETE':
+                    return isFile ? RequestType.DeleteFile : RequestType.DeleteDir;
+                case 'APPEND':
+                    return isFile ? RequestType.AppendFile : RequestType.Unknown;
+            }
+        }
+        return RequestType.Unknown;
+    }
+}
+function handleRequestOperation(req, res, operation, reqPath) {
+    switch (operation) {
+        case RequestType.GetDir:
+            var filesInFolder = dir(reqPath, "", { recursive: true });
+            send('success', res, filesInFolder.join(','));
+            break;
+        case RequestType.GetFile:
+            fs.readFile(reqPath, function (err, file) {
+                var ext = reqPath.substr(reqPath.lastIndexOf('.'));
+                var contentType = 'binary';
+                if (ext === '.js')
+                    contentType = 'text/javascript';
+                else if (ext === '.css')
+                    contentType = 'text/javascript';
+                else if (ext === '.html')
+                    contentType = 'text/html';
+                err
+                    ? send('fail', res, err.message, contentType)
+                    : send('success', res, file, contentType);
+            });
+            break;
+        case RequestType.ResolveFile:
+            var resolveRequest = req.url.match(/(.*)\?resolve/);
+            handleResolutionRequest(resolveRequest[1], res);
+            break;
+        case RequestType.WriteFile:
+            processPost(req, res, function (data) {
+                writeFile(reqPath, data, { recursive: true });
+            });
+            send('success', res, null);
+            break;
+        case RequestType.WriteDir:
+            fs.mkdirSync(reqPath);
+            send('success', res, null);
+            break;
+        case RequestType.DeleteFile:
+            if (fs.existsSync(reqPath)) {
+                fs.unlinkSync(reqPath);
+            }
+            send('success', res, null);
+            break;
+        case RequestType.DeleteDir:
+            if (fs.existsSync(reqPath)) {
+                fs.rmdirSync(reqPath);
+            }
+            send('success', res, null);
+            break;
+        case RequestType.AppendFile:
+            processPost(req, res, function (data) {
+                fs.appendFileSync(reqPath, data);
+            });
+            send('success', res, null);
+            break;
+        case RequestType.Unknown:
+        default:
+            send('unknown', res, null);
+            break;
+    }
+}
+console.log("Static file server running at\n  => http://localhost:" + port + "/\nCTRL + C to shutdown");
+http.createServer(function (req, res) {
+    log(req.method + ' ' + req.url);
+    var uri = url.parse(req.url).pathname;
+    var reqPath = path.join(process.cwd(), uri);
+    var operation = getRequestOperation(req, reqPath);
+    handleRequestOperation(req, res, operation, reqPath);
+}).listen(8888);
+var browserPath;
+if ((browser && browser === 'chrome')) {
+    var defaultChromePath = "";
+    switch (os.platform()) {
+        case "win32":
+        case "win64":
+            defaultChromePath = "C:/Program Files (x86)/Google/Chrome/Application/chrome.exe";
+            break;
+        case "darwin":
+            defaultChromePath = "/Applications/Google Chrome.app/Contents/MacOS/Google Chrome";
+            break;
+        case "linux":
+            defaultChromePath = "/opt/google/chrome/chrome";
+            break;
+        default:
+            console.log("default Chrome location is unknown for platform '" + os.platform() + "'");
+            break;
+    }
+    if (fs.existsSync(defaultChromePath)) {
+        browserPath = defaultChromePath;
+    }
+    else {
+        browserPath = browser;
+    }
+}
+else {
+    var defaultIEPath = 'C:/Program Files/Internet Explorer/iexplore.exe';
+    if (fs.existsSync(defaultIEPath)) {
+        browserPath = defaultIEPath;
+    }
+    else {
+        browserPath = browser;
+    }
+}
+console.log('Using browser: ' + browserPath);
+var queryString = grep ? "?grep=" + grep : '';
+child_process.spawn(browserPath, ['http://localhost:' + port + '/tests/webTestResults.html' + queryString], {
+    stdio: 'inherit'
+});
+//# sourceMappingURL=file:///C:/Users/lizhe/Documents/github/TypeScript/tests/webTestServer.js.map
\ No newline at end of file
diff --git a/tests/webTestServer.js.map b/tests/webTestServer.js.map
new file mode 100644
index 00000000000..1c924a872f4
--- /dev/null
+++ b/tests/webTestServer.js.map
@@ -0,0 +1 @@
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\ No newline at end of file

From 0dddcf4b84ee3eba1413a1591984605ef4940708 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Thu, 14 Apr 2016 16:51:22 -0700
Subject: [PATCH 025/332] code clean up

---
 src/compiler/parser.ts                     |  38 ++-
 src/compiler/types.ts                      |   2 +
 src/compiler/utilities.ts                  |  32 +--
 src/harness/harness.ts                     |   4 +-
 src/services/services.ts                   |   9 +-
 tests/cases/fourslash/commentsVariables.ts |  80 +++---
 tests/cases/fourslash/doesnotwork.ts       |  45 ----
 tests/webTestServer.js                     | 288 ---------------------
 tests/webTestServer.js.map                 |   1 -
 9 files changed, 72 insertions(+), 427 deletions(-)
 delete mode 100644 tests/cases/fourslash/doesnotwork.ts
 delete mode 100644 tests/webTestServer.js
 delete mode 100644 tests/webTestServer.js.map

diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 058098eff1d..3a1c3c62f41 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -409,7 +409,6 @@ namespace ts {
                 return visitNodes(cbNodes, (<JSDocTypeLiteral>node).members);
             case SyntaxKind.JSDocPropertyTag:
                 return visitNode(cbNode, (<JSDocPropertyTag>node).typeExpression) ||
-                    visitNode(cbNode, (<JSDocPropertyTag>node).type) ||
                     visitNode(cbNode, (<JSDocPropertyTag>node).name);
         }
     }
@@ -4063,9 +4062,9 @@ namespace ts {
             const isAsync = !!(node.flags & NodeFlags.Async);
             node.name =
                 isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
-                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
-                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
-                            parseOptionalIdentifier();
+                isGenerator ? doInYieldContext(parseOptionalIdentifier) :
+                isAsync ? doInAwaitContext(parseOptionalIdentifier) :
+                parseOptionalIdentifier();
 
             fillSignature(SyntaxKind.ColonToken, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
             node.body = parseFunctionBlock(/*allowYield*/ isGenerator, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
@@ -6121,15 +6120,13 @@ namespace ts {
                                 typedefTag.type = typedefTag.jsDocTypeTag.typeExpression.type;
                             }
                         }
-                        if (!typedefTag.type && typedefTag.jsDocPropertyTags) {
-                            const childrenTagPoses = ts.map(typedefTag.jsDocPropertyTags, tag => tag.pos);
-                            const childrenTagEnds = ts.map(typedefTag.jsDocPropertyTags, tag => tag.end);
-                            const pos = Math.min(...childrenTagPoses);
-                            const end = Math.max(...childrenTagEnds);
-                            const tagType = <JSDocTypeLiteral>createNode(SyntaxKind.JSDocTypeLiteral, pos);
-                            tagType.members = <NodeArray<JSDocPropertyTag>>[];
-                            addRange(tagType.members, typedefTag.jsDocPropertyTags);
-                            typedefTag.type = finishNode(tagType, end);
+                        if (!typedefTag.type && typedefTag.jsDocPropertyTags && typedefTag.jsDocPropertyTags.length > 0) {
+                            const pos = typedefTag.jsDocPropertyTags[0].pos;
+                            const end = typedefTag.jsDocPropertyTags[typedefTag.jsDocPropertyTags.length - 1].end;
+                            const jsdocTypeLiteral = <JSDocTypeLiteral>createNode(SyntaxKind.JSDocTypeLiteral, pos);
+                            jsdocTypeLiteral.members = <NodeArray<JSDocPropertyTag>>[];
+                            addRange(jsdocTypeLiteral.members, typedefTag.jsDocPropertyTags);
+                            typedefTag.type = finishNode(jsdocTypeLiteral, end);
                         }
                     }
 
@@ -6303,23 +6300,18 @@ namespace ts {
                     result.typeExpression = tryParseTypeExpression();
                     result = finishNode(result);
 
-                    let typeTagPartOfParentTag = false;
                     if (currentParentJSDocTag && currentParentJSDocTag.kind === SyntaxKind.JSDocTypedefTag) {
                         const parentTag = <JSDocTypedefTag>currentParentJSDocTag;
                         if (!parentTag.typeExpression && !parentTag.jsDocTypeTag) {
-                            typeTagPartOfParentTag = true;
                             parentTag.jsDocTypeTag = result;
                             currentParentJSDocTagEnd = scanner.getStartPos();
+                            return result;
                         }
                     }
-                    if (!typeTagPartOfParentTag) {
-                        // If this @type tag is not part of the current parent tag, then
-                        // it denotes the end of the current parent tag.
-                        finishCurrentParentTag();
-                        return result;
-                    }
-
-                    return undefined;
+                    // If this @type tag is not part of the current parent tag, then
+                    // it denotes the end of the current parent tag.
+                    finishCurrentParentTag();
+                    return result;
                 }
 
                 function handlePropertyTag(atToken: Node, tagName: Identifier): JSDocPropertyTag {
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 7743f7c35de..91ce1f1022f 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1533,6 +1533,8 @@ namespace ts {
     export interface JSDocPropertyTag extends JSDocTag, TypeElement {
         name: Identifier;
         typeExpression: JSDocTypeExpression;
+        // Add a "type" property here to make the interface compatible 
+        // with the "VariableLikeDeclaration" definition
         type: TypeNode;
     }
 
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index ebf6b42581a..2f29e477d69 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -279,13 +279,16 @@ namespace ts {
             return skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos, /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
         }
 
-        if (node.jsDocComments && node.jsDocComments.length > 0 && includeJsDocComment) {
+        if (includeJsDocComment && node.jsDocComments && node.jsDocComments.length > 0) {
             return getTokenPosOfNode(node.jsDocComments[0]);
         }
 
-        if (node.kind === SyntaxKind.SyntaxList) {
-            const childrenPoses = ts.map((<SyntaxList>node)._children, child => getTokenPosOfNode(<Node>child, sourceFile, includeJsDocComment));
-            return Math.min(...childrenPoses);
+        // For a syntax list, it is possible that one of its children has JSDocComment nodes, while 
+        // the syntax list itself considers them as normal trivia. Therefore if we simply skip 
+        // trivia for the list, we may have skipped the JSDocComment as well. So we should process its
+        // first child to determine the actual position of its first token.
+        if (node.kind === SyntaxKind.SyntaxList && (<SyntaxList>node)._children.length > 0) {
+            return getTokenPosOfNode((<SyntaxList>node)._children[0], sourceFile, includeJsDocComment);
         }
 
         return skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
@@ -294,27 +297,6 @@ namespace ts {
     export function isJSDocNode(node: Node) {
         return node.kind >= SyntaxKind.FirstJSDocNode && node.kind <= SyntaxKind.LastJSDocNode;
     }
-    export function isJSDocType(node: Node) {
-        switch (node.kind) {
-            case SyntaxKind.JSDocAllType:
-            case SyntaxKind.JSDocUnknownType:
-            case SyntaxKind.JSDocArrayType:
-            case SyntaxKind.JSDocUnionType:
-            case SyntaxKind.JSDocTupleType:
-            case SyntaxKind.JSDocNullableType:
-            case SyntaxKind.JSDocNonNullableType:
-            case SyntaxKind.JSDocRecordType:
-            case SyntaxKind.JSDocRecordMember:
-            case SyntaxKind.JSDocTypeReference:
-            case SyntaxKind.JSDocOptionalType:
-            case SyntaxKind.JSDocFunctionType:
-            case SyntaxKind.JSDocVariadicType:
-            case SyntaxKind.JSDocConstructorType:
-            case SyntaxKind.JSDocThisType:
-                return true;
-        }
-        return false;
-    }
 
     export function getNonDecoratorTokenPosOfNode(node: Node, sourceFile?: SourceFile): number {
         if (nodeIsMissing(node) || !node.decorators) {
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index 790ecebb75f..e07fe60ba86 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -222,7 +222,9 @@ namespace Utils {
                 return k;
             }
 
-            if (k === (<any>ts).SyntaxKind.FirstJSDocCommentNode || k === (<any>ts).SyntaxKind.LastJSDocCommentNode) {
+            // For some markers in SyntaxKind, we should print its original syntax name instead of
+            // the marker name in tests.
+            if (k === (<any>ts).SyntaxKind.FirstJSDocNode || k === (<any>ts).SyntaxKind.LastJSDocNode) {
                 for (const kindName in (<any>ts).SyntaxKind) {
                     if ((<any>ts).SyntaxKind[kindName] === k) {
                         return kindName;
diff --git a/src/services/services.ts b/src/services/services.ts
index f2906aaa8b4..ffbb174fe8c 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -173,6 +173,7 @@ namespace ts {
         "type",
         "typedef",
         "property",
+        "prop",
         "version"
     ];
     let jsDocCompletionEntries: CompletionEntry[];
@@ -274,7 +275,7 @@ namespace ts {
                 scanner.setText((sourceFile || this.getSourceFile()).text);
                 children = [];
                 let pos = this.pos;
-                const isJSDocTag =
+                const useJSDocScanner =
                     this.kind === SyntaxKind.JSDocComment ||
                     this.kind === SyntaxKind.JSDocParameterTag ||
                     this.kind === SyntaxKind.JSDocTag ||
@@ -286,14 +287,14 @@ namespace ts {
                     this.kind === SyntaxKind.JSDocPropertyTag;
                 const processNode = (node: Node) => {
                     if (pos < node.pos) {
-                        pos = this.addSyntheticNodes(children, pos, node.pos, /*useJSDocScanner*/ isJSDocTag);
+                        pos = this.addSyntheticNodes(children, pos, node.pos, useJSDocScanner);
                     }
                     children.push(node);
                     pos = node.end;
                 };
                 const processNodes = (nodes: NodeArray<Node>) => {
                     if (pos < nodes.pos) {
-                        pos = this.addSyntheticNodes(children, pos, nodes.pos, /*useJSDocScanner*/ isJSDocTag);
+                        pos = this.addSyntheticNodes(children, pos, nodes.pos, useJSDocScanner);
                     }
                     children.push(this.createSyntaxList(<NodeArray<Node>>nodes));
                     pos = nodes.end;
@@ -7803,7 +7804,7 @@ namespace ts {
                     break;
                 default:
                     forEachChild(node, walk);
-                    if (node.jsDocComments && node.jsDocComments.length > 0) {
+                    if (node.jsDocComments) {
                         for (const jsDocComment of node.jsDocComments) {
                             forEachChild(jsDocComment, walk);
                         }
diff --git a/tests/cases/fourslash/commentsVariables.ts b/tests/cases/fourslash/commentsVariables.ts
index b2cf6c9cb9b..d62e1e9bee8 100644
--- a/tests/cases/fourslash/commentsVariables.ts
+++ b/tests/cases/fourslash/commentsVariables.ts
@@ -41,60 +41,60 @@
 ////}
 ////var x = fo/*15*/o2;
 
-// goTo.marker('1');
-// verify.quickInfoIs("var myVariable: number", "This is my variable");
+goTo.marker('1');
+verify.quickInfoIs("var myVariable: number", "This is my variable");
 
-// goTo.marker('2');
-// verify.completionListContains("myVariable", "var myVariable: number", "This is my variable");
+goTo.marker('2');
+verify.completionListContains("myVariable", "var myVariable: number", "This is my variable");
 
-// goTo.marker('3');
-// verify.completionListContains("myVariable", "var myVariable: number", "This is my variable");
-// verify.completionListContains("d", "var d: number", "d variable");
+goTo.marker('3');
+verify.completionListContains("myVariable", "var myVariable: number", "This is my variable");
+verify.completionListContains("d", "var d: number", "d variable");
 
 goTo.marker('4');
 verify.completionListContains("foo", "function foo(): void", "foos comment");
 verify.completionListContains("fooVar", "var fooVar: () => void", "fooVar comment");
 
-// goTo.marker('5');
-// verify.currentSignatureHelpDocCommentIs("foos comment");
-// goTo.marker('5q');
-// verify.quickInfoIs("function foo(): void", "foos comment");
+goTo.marker('5');
+verify.currentSignatureHelpDocCommentIs("foos comment");
+goTo.marker('5q');
+verify.quickInfoIs("function foo(): void", "foos comment");
 
-// goTo.marker('6');
-// verify.currentSignatureHelpDocCommentIs("");
-// goTo.marker('6q');
-// verify.quickInfoIs("var fooVar: () => void", "");
+goTo.marker('6');
+verify.currentSignatureHelpDocCommentIs("");
+goTo.marker('6q');
+verify.quickInfoIs("var fooVar: () => void", "");
 
-// goTo.marker('7');
-// verify.completionListContains("foo", "function foo(): void", "foos comment");
-// verify.completionListContains("fooVar", "var fooVar: () => void", "fooVar comment");
+goTo.marker('7');
+verify.completionListContains("foo", "function foo(): void", "foos comment");
+verify.completionListContains("fooVar", "var fooVar: () => void", "fooVar comment");
 
-// goTo.marker('8');
-// verify.currentSignatureHelpDocCommentIs("foos comment");
-// goTo.marker('8q');
-// verify.quickInfoIs("function foo(): void", "foos comment");
+goTo.marker('8');
+verify.currentSignatureHelpDocCommentIs("foos comment");
+goTo.marker('8q');
+verify.quickInfoIs("function foo(): void", "foos comment");
 
-// goTo.marker('9');
-// verify.currentSignatureHelpDocCommentIs("");
-// goTo.marker('9q');
-// verify.quickInfoIs("var fooVar: () => void", "");
-// goTo.marker('9aq');
-// verify.quickInfoIs("var fooVar: () => void", "fooVar comment");
+goTo.marker('9');
+verify.currentSignatureHelpDocCommentIs("");
+goTo.marker('9q');
+verify.quickInfoIs("var fooVar: () => void", "");
+goTo.marker('9aq');
+verify.quickInfoIs("var fooVar: () => void", "fooVar comment");
 
-// goTo.marker('10');
-// verify.completionListContains("i", "var i: c", "instance comment");
+goTo.marker('10');
+verify.completionListContains("i", "var i: c", "instance comment");
 
-// goTo.marker('11');
-// verify.completionListContains("i1_i", "var i1_i: i1", "interface instance comments");
+goTo.marker('11');
+verify.completionListContains("i1_i", "var i1_i: i1", "interface instance comments");
 
-// goTo.marker('12');
-// verify.quickInfoIs("var fooVar: () => void", "fooVar comment");
+goTo.marker('12');
+verify.quickInfoIs("var fooVar: () => void", "fooVar comment");
 
-// goTo.marker('13');
-// verify.quickInfoIs("var fooVar: () => void", "fooVar comment");
+goTo.marker('13');
+verify.quickInfoIs("var fooVar: () => void", "fooVar comment");
 
-// goTo.marker('14');
-// verify.quickInfoIs("function foo(): void", "foos comment");
+goTo.marker('14');
+verify.quickInfoIs("function foo(): void", "foos comment");
 
-// goTo.marker('15');
-// verify.quickInfoIs("function foo2(a: number): void (+1 overload)", "");
+goTo.marker('15');
+verify.quickInfoIs("function foo2(a: number): void (+1 overload)", "");
diff --git a/tests/cases/fourslash/doesnotwork.ts b/tests/cases/fourslash/doesnotwork.ts
deleted file mode 100644
index 2f415563c21..00000000000
--- a/tests/cases/fourslash/doesnotwork.ts
+++ /dev/null
@@ -1,45 +0,0 @@
-/// <reference path='fourslash.ts' />
-
-/////** This is my variable*/
-////var myVariable = 10;
-////
-/////** d variable*/
-////var d = 10;
-////myVariable = d;
-////
-/////** foos comment*/
-////function foo() {
-////}
-/////** fooVar comment*/
-////var fooVar: () => void;
-/////*4*/
-////foo();
-////fooVar();
-////fooVar = foo;
-////
-////foo();
-////fooVar();
-////var fooVarVar = fooVar;
-/////**class comment*/
-////class c {
-////    /** constructor comment*/
-////    constructor() {
-////    }
-////}
-/////**instance comment*/
-////var i = new c();
-////
-/////** interface comments*/
-////interface i1 {
-////}
-/////**interface instance comments*/
-////var i1_i: i1;
-////
-////function foo2(a: number): void;
-////function foo2(b: string): void;
-////function foo2(aOrb) {
-////}
-////var x = foo2;
-
-goTo.marker('4');
-verify.completionListContains("fooVar", "var fooVar: () => void", "fooVar comment");
diff --git a/tests/webTestServer.js b/tests/webTestServer.js
deleted file mode 100644
index b47da7bfe76..00000000000
--- a/tests/webTestServer.js
+++ /dev/null
@@ -1,288 +0,0 @@
-/// <reference path='..\src\harness\external\node.d.ts'/>
-"use strict";
-var http = require("http");
-var fs = require("fs");
-var path = require("path");
-var url = require("url");
-var child_process = require("child_process");
-var os = require("os");
-/// Command line processing ///
-if (process.argv[2] == '--help') {
-    console.log('Runs a node server on port 8888 by default, looking for tests folder in the current directory\n');
-    console.log('Syntax: node nodeServer.js [port] [typescriptEnlistmentDirectory] [tests] [--browser] [--verbose]\n');
-    console.log('Examples: \n\tnode nodeServer.js 8888 .');
-    console.log('\tnode nodeServer.js 3000 D:/src/typescript/public --verbose IE');
-}
-function switchToForwardSlashes(path) {
-    return path.replace(/\\/g, "/").replace(/\/\//g, '/');
-}
-var defaultPort = 8888;
-var port = process.argv[2] || defaultPort;
-var rootDir = switchToForwardSlashes(__dirname + '/../');
-var browser;
-if (process.argv[3]) {
-    browser = process.argv[3];
-    if (browser !== 'chrome' && browser !== 'IE') {
-        console.log('Invalid command line arguments. Got ' + browser + ' but expected chrome, IE or nothing.');
-    }
-}
-var grep = process.argv[4];
-var verbose = false;
-if (process.argv[5] == '--verbose') {
-    verbose = true;
-}
-else if (process.argv[5] && process.argv[5] !== '--verbose') {
-    console.log('Invalid command line arguments. Got ' + process.argv[5] + ' but expected --verbose or nothing.');
-}
-/// Utils ///
-function log(msg) {
-    if (verbose) {
-        console.log(msg);
-    }
-}
-// Copied from the compiler sources
-function dir(path, spec, options) {
-    options = options || {};
-    function filesInFolder(folder) {
-        var folder = switchToForwardSlashes(folder);
-        var paths = [];
-        // Everything after the current directory is relative
-        var baseDirectoryLength = process.cwd().length + 1;
-        try {
-            var files = fs.readdirSync(folder);
-            for (var i = 0; i < files.length; i++) {
-                var stat = fs.statSync(folder + "/" + files[i]);
-                if (options.recursive && stat.isDirectory()) {
-                    paths = paths.concat(filesInFolder(folder + "/" + files[i]));
-                }
-                else if (stat.isFile() && (!spec || files[i].match(spec))) {
-                    var relativePath = folder.substring(baseDirectoryLength);
-                    paths.push(relativePath + "/" + files[i]);
-                }
-            }
-        }
-        catch (err) {
-        }
-        return paths;
-    }
-    return filesInFolder(path);
-}
-// fs.rmdirSync won't delete directories with files in it
-function deleteFolderRecursive(path) {
-    if (fs.existsSync(path)) {
-        fs.readdirSync(path).forEach(function (file, index) {
-            var curPath = path + "/" + file;
-            if (fs.statSync(curPath).isDirectory()) {
-                deleteFolderRecursive(curPath);
-            }
-            else {
-                fs.unlinkSync(curPath);
-            }
-        });
-        fs.rmdirSync(path);
-    }
-}
-;
-function writeFile(path, data, opts) {
-    try {
-        fs.writeFileSync(path, data);
-    }
-    catch (e) {
-        // assume file was written to a directory that exists, if not, start recursively creating them as necessary
-        var parts = switchToForwardSlashes(path).split('/');
-        for (var i = 0; i < parts.length; i++) {
-            var subDir = parts.slice(0, i).join('/');
-            if (!fs.existsSync(subDir)) {
-                fs.mkdir(subDir);
-            }
-        }
-        fs.writeFileSync(path, data);
-    }
-}
-/// Request Handling ///
-function handleResolutionRequest(filePath, res) {
-    var resolvedPath = path.resolve(filePath, '');
-    resolvedPath = resolvedPath.substring(resolvedPath.indexOf('tests'));
-    resolvedPath = switchToForwardSlashes(resolvedPath);
-    send('success', res, resolvedPath);
-    return;
-}
-function send(result, res, contents, contentType) {
-    if (contentType === void 0) { contentType = "binary"; }
-    var responseCode = result === "success" ? 200 : result === "fail" ? 500 : result === 'unknown' ? 404 : parseInt(result);
-    res.writeHead(responseCode, { "Content-Type": contentType });
-    res.end(contents);
-    return;
-}
-// Reads the data from a post request and passes it to the given callback
-function processPost(req, res, callback) {
-    var queryData = "";
-    if (typeof callback !== 'function')
-        return null;
-    if (req.method == 'POST') {
-        req.on('data', function (data) {
-            queryData += data;
-            if (queryData.length > 1e8) {
-                queryData = "";
-                send("413", res, null);
-                console.log("ERROR: destroying connection");
-                req.connection.destroy();
-            }
-        });
-        req.on('end', function () {
-            //res.post = url.parse(req.url).query;
-            callback(queryData);
-        });
-    }
-    else {
-        send("405", res, null);
-    }
-}
-var RequestType;
-(function (RequestType) {
-    RequestType[RequestType["GetFile"] = 0] = "GetFile";
-    RequestType[RequestType["GetDir"] = 1] = "GetDir";
-    RequestType[RequestType["ResolveFile"] = 2] = "ResolveFile";
-    RequestType[RequestType["WriteFile"] = 3] = "WriteFile";
-    RequestType[RequestType["DeleteFile"] = 4] = "DeleteFile";
-    RequestType[RequestType["WriteDir"] = 5] = "WriteDir";
-    RequestType[RequestType["DeleteDir"] = 6] = "DeleteDir";
-    RequestType[RequestType["AppendFile"] = 7] = "AppendFile";
-    RequestType[RequestType["Unknown"] = 8] = "Unknown";
-})(RequestType || (RequestType = {}));
-function getRequestOperation(req, filename) {
-    if (req.method === 'GET' && req.url.indexOf('?') === -1) {
-        if (req.url.indexOf('.') !== -1)
-            return RequestType.GetFile;
-        else
-            return RequestType.GetDir;
-    }
-    else {
-        var queryData = url.parse(req.url, true).query;
-        if (req.method === 'GET' && queryData.resolve !== undefined)
-            return RequestType.ResolveFile;
-        // mocha uses ?grep=<regexp> query string as equivalent to the --grep command line option used to filter tests
-        if (req.method === 'GET' && queryData.grep !== undefined)
-            return RequestType.GetFile;
-        if (req.method === 'POST' && queryData.action) {
-            var path = req.url.substr(0, req.url.lastIndexOf('?'));
-            var isFile = path.substring(path.lastIndexOf('/')).indexOf('.') !== -1;
-            switch (queryData.action.toUpperCase()) {
-                case 'WRITE':
-                    return isFile ? RequestType.WriteFile : RequestType.WriteDir;
-                case 'DELETE':
-                    return isFile ? RequestType.DeleteFile : RequestType.DeleteDir;
-                case 'APPEND':
-                    return isFile ? RequestType.AppendFile : RequestType.Unknown;
-            }
-        }
-        return RequestType.Unknown;
-    }
-}
-function handleRequestOperation(req, res, operation, reqPath) {
-    switch (operation) {
-        case RequestType.GetDir:
-            var filesInFolder = dir(reqPath, "", { recursive: true });
-            send('success', res, filesInFolder.join(','));
-            break;
-        case RequestType.GetFile:
-            fs.readFile(reqPath, function (err, file) {
-                var ext = reqPath.substr(reqPath.lastIndexOf('.'));
-                var contentType = 'binary';
-                if (ext === '.js')
-                    contentType = 'text/javascript';
-                else if (ext === '.css')
-                    contentType = 'text/javascript';
-                else if (ext === '.html')
-                    contentType = 'text/html';
-                err
-                    ? send('fail', res, err.message, contentType)
-                    : send('success', res, file, contentType);
-            });
-            break;
-        case RequestType.ResolveFile:
-            var resolveRequest = req.url.match(/(.*)\?resolve/);
-            handleResolutionRequest(resolveRequest[1], res);
-            break;
-        case RequestType.WriteFile:
-            processPost(req, res, function (data) {
-                writeFile(reqPath, data, { recursive: true });
-            });
-            send('success', res, null);
-            break;
-        case RequestType.WriteDir:
-            fs.mkdirSync(reqPath);
-            send('success', res, null);
-            break;
-        case RequestType.DeleteFile:
-            if (fs.existsSync(reqPath)) {
-                fs.unlinkSync(reqPath);
-            }
-            send('success', res, null);
-            break;
-        case RequestType.DeleteDir:
-            if (fs.existsSync(reqPath)) {
-                fs.rmdirSync(reqPath);
-            }
-            send('success', res, null);
-            break;
-        case RequestType.AppendFile:
-            processPost(req, res, function (data) {
-                fs.appendFileSync(reqPath, data);
-            });
-            send('success', res, null);
-            break;
-        case RequestType.Unknown:
-        default:
-            send('unknown', res, null);
-            break;
-    }
-}
-console.log("Static file server running at\n  => http://localhost:" + port + "/\nCTRL + C to shutdown");
-http.createServer(function (req, res) {
-    log(req.method + ' ' + req.url);
-    var uri = url.parse(req.url).pathname;
-    var reqPath = path.join(process.cwd(), uri);
-    var operation = getRequestOperation(req, reqPath);
-    handleRequestOperation(req, res, operation, reqPath);
-}).listen(8888);
-var browserPath;
-if ((browser && browser === 'chrome')) {
-    var defaultChromePath = "";
-    switch (os.platform()) {
-        case "win32":
-        case "win64":
-            defaultChromePath = "C:/Program Files (x86)/Google/Chrome/Application/chrome.exe";
-            break;
-        case "darwin":
-            defaultChromePath = "/Applications/Google Chrome.app/Contents/MacOS/Google Chrome";
-            break;
-        case "linux":
-            defaultChromePath = "/opt/google/chrome/chrome";
-            break;
-        default:
-            console.log("default Chrome location is unknown for platform '" + os.platform() + "'");
-            break;
-    }
-    if (fs.existsSync(defaultChromePath)) {
-        browserPath = defaultChromePath;
-    }
-    else {
-        browserPath = browser;
-    }
-}
-else {
-    var defaultIEPath = 'C:/Program Files/Internet Explorer/iexplore.exe';
-    if (fs.existsSync(defaultIEPath)) {
-        browserPath = defaultIEPath;
-    }
-    else {
-        browserPath = browser;
-    }
-}
-console.log('Using browser: ' + browserPath);
-var queryString = grep ? "?grep=" + grep : '';
-child_process.spawn(browserPath, ['http://localhost:' + port + '/tests/webTestResults.html' + queryString], {
-    stdio: 'inherit'
-});
-//# sourceMappingURL=file:///C:/Users/lizhe/Documents/github/TypeScript/tests/webTestServer.js.map
\ No newline at end of file
diff --git a/tests/webTestServer.js.map b/tests/webTestServer.js.map
deleted file mode 100644
index 1c924a872f4..00000000000
--- a/tests/webTestServer.js.map
+++ /dev/null
@@ -1 +0,0 @@
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\ No newline at end of file

From 15cbb0216202eec3e9fa5f04c124607d4bf8c020 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Fri, 22 Apr 2016 14:26:30 -0700
Subject: [PATCH 026/332] refactor

---
 src/compiler/types.ts     | 2 +-
 src/services/utilities.ts | 7 +++----
 2 files changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 91ce1f1022f..f40237ba47e 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -450,7 +450,7 @@ namespace ts {
         modifiers?: ModifiersArray;                     // Array of modifiers
         /* @internal */ id?: number;                    // Unique id (used to look up NodeLinks)
         parent?: Node;                                  // Parent node (initialized by binding
-        /* @internal */ jsDocComments?: JSDocComment[];    // JSDoc for the node, if it has any.  Only for .js files.
+        /* @internal */ jsDocComments?: JSDocComment[]; // JSDoc for the node, if it has any.  Only for .js files.
         /* @internal */ symbol?: Symbol;                // Symbol declared by node (initialized by binding)
         /* @internal */ locals?: SymbolTable;           // Locals associated with node (initialized by binding)
         /* @internal */ nextContainer?: Node;           // Next container in declaration order (initialized by binding)
diff --git a/src/services/utilities.ts b/src/services/utilities.ts
index 73ac43911b5..0230195b0cc 100644
--- a/src/services/utilities.ts
+++ b/src/services/utilities.ts
@@ -267,7 +267,7 @@ namespace ts {
             if (includeJsDocComment) {
                 const jsDocChildren = ts.filter(current.getChildren(), isJSDocNode);
                 for (const jsDocChild of jsDocChildren) {
-                    let start = allowPositionInLeadingTrivia ? jsDocChild.getFullStart() : jsDocChild.getStart(sourceFile, includeJsDocComment);
+                    const start = allowPositionInLeadingTrivia ? jsDocChild.getFullStart() : jsDocChild.getStart(sourceFile, includeJsDocComment);
                     if (start <= position) {
                         let end = jsDocChild.getEnd();
                         if (position < end || (position === end && jsDocChild.kind === SyntaxKind.EndOfFileToken)) {
@@ -500,9 +500,8 @@ namespace ts {
         }
 
         if (node) {
-            let jsDocComments = node.jsDocComments;
-            if (jsDocComments) {
-                for (const jsDocComment of jsDocComments) {
+            if (node.jsDocComments) {
+                for (const jsDocComment of node.jsDocComments) {
                     for (const tag of jsDocComment.tags) {
                         if (tag.pos <= position && position <= tag.end) {
                             return tag;

From d568d79b495d256e93907b28c3aeec912b41594f Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Fri, 22 Apr 2016 15:19:57 -0700
Subject: [PATCH 027/332] resolve build error

---
 src/compiler/parser.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index b9662126e65..612602f5658 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -6322,7 +6322,7 @@ namespace ts {
 
                     const typeExpression = tryParseTypeExpression();
                     skipWhitespace();
-                    const name = parseJSDocIdentifier();
+                    const name = parseJSDocIdentifierName();
                     if (!name) {
                         parseErrorAtPosition(scanner.getStartPos(), /*length*/ 0, Diagnostics.Identifier_expected);
                         return undefined;
@@ -6344,7 +6344,7 @@ namespace ts {
                 function handleTypedefTag(atToken: Node, tagName: Identifier): JSDocTypedefTag {
                     const typeExpression = tryParseTypeExpression();
                     skipWhitespace();
-                    let name = parseJSDocIdentifier();
+                    let name = parseJSDocIdentifierName();
                     if (!name) {
                         let foundNameFromParentNode = false;
                         if (parentNode && parentNode.kind === SyntaxKind.VariableStatement) {

From 79bb4ba5b42d58c2f8ff8955f26f58a9ef24cddb Mon Sep 17 00:00:00 2001
From: Zhengbo Li <zhengbli@microsoft.com>
Date: Mon, 25 Apr 2016 11:56:16 -0700
Subject: [PATCH 028/332] Fix broken test

---
 src/services/utilities.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/services/utilities.ts b/src/services/utilities.ts
index bf90a023c14..12baca1af54 100644
--- a/src/services/utilities.ts
+++ b/src/services/utilities.ts
@@ -445,6 +445,10 @@ namespace ts {
             return false;
         }
 
+        if (token.kind === SyntaxKind.JsxText) {
+            return true;
+        }
+
         // <div>Hello |</div>
         if (token.kind === SyntaxKind.LessThanToken && token.parent.kind === SyntaxKind.JsxText) {
             return true;
@@ -455,7 +459,7 @@ namespace ts {
             return true;
         }
 
-        // <div> { 
+        // <div> {
         // |
         // } < /div>
         if (token && token.kind === SyntaxKind.CloseBraceToken && token.parent.kind === SyntaxKind.JsxExpression) {

From 20d8a94d66ce467053bce183b0a1e0538a1ea96d Mon Sep 17 00:00:00 2001
From: Wesley Wigham <wwigham@gmail.com>
Date: Thu, 25 Feb 2016 03:32:15 -0500
Subject: [PATCH 029/332] Remove check narrowing only certain types, add test
 showing issues with this

---
 .../typeGuardNarrowsPrimitiveIntersection.js  | 38 ++++++++++
 ...eGuardNarrowsPrimitiveIntersection.symbols | 70 +++++++++++++++++
 ...ypeGuardNarrowsPrimitiveIntersection.types | 76 +++++++++++++++++++
 .../typeGuardNarrowsPrimitiveIntersection.ts  | 21 +++++
 4 files changed, 205 insertions(+)
 create mode 100644 tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.js
 create mode 100644 tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.symbols
 create mode 100644 tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.types
 create mode 100644 tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts

diff --git a/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.js b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.js
new file mode 100644
index 00000000000..a4cba6f4ab5
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.js
@@ -0,0 +1,38 @@
+//// [typeGuardNarrowsPrimitiveIntersection.ts]
+type Tag = {__tag: any};
+declare function isNonBlank(value: string) : value is (string & Tag);
+declare function doThis(value: string & Tag): void;
+declare function doThat(value: string) : void;
+let value: string;
+if (isNonBlank(value)) {
+    doThis(value);
+} else {
+    doThat(value);
+}
+
+
+const enum Tag2 {}
+declare function isNonBlank2(value: string) : value is (string & Tag2);
+declare function doThis2(value: string & Tag2): void;
+declare function doThat2(value: string) : void;
+if (isNonBlank2(value)) {
+    doThis2(value);
+} else {
+    doThat2(value);
+}
+
+
+//// [typeGuardNarrowsPrimitiveIntersection.js]
+var value;
+if (isNonBlank(value)) {
+    doThis(value);
+}
+else {
+    doThat(value);
+}
+if (isNonBlank2(value)) {
+    doThis2(value);
+}
+else {
+    doThat2(value);
+}
diff --git a/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.symbols b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.symbols
new file mode 100644
index 00000000000..da507fb94c5
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.symbols
@@ -0,0 +1,70 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts ===
+type Tag = {__tag: any};
+>Tag : Symbol(Tag, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 0))
+>__tag : Symbol(__tag, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 12))
+
+declare function isNonBlank(value: string) : value is (string & Tag);
+>isNonBlank : Symbol(isNonBlank, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 24))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 1, 28))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 1, 28))
+>Tag : Symbol(Tag, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 0))
+
+declare function doThis(value: string & Tag): void;
+>doThis : Symbol(doThis, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 1, 69))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 2, 24))
+>Tag : Symbol(Tag, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 0))
+
+declare function doThat(value: string) : void;
+>doThat : Symbol(doThat, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 2, 51))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 3, 24))
+
+let value: string;
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+
+if (isNonBlank(value)) {
+>isNonBlank : Symbol(isNonBlank, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 24))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+
+    doThis(value);
+>doThis : Symbol(doThis, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 1, 69))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+
+} else {
+    doThat(value);
+>doThat : Symbol(doThat, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 2, 51))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+}
+
+
+const enum Tag2 {}
+>Tag2 : Symbol(Tag2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 9, 1))
+
+declare function isNonBlank2(value: string) : value is (string & Tag2);
+>isNonBlank2 : Symbol(isNonBlank2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 12, 18))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 13, 29))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 13, 29))
+>Tag2 : Symbol(Tag2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 9, 1))
+
+declare function doThis2(value: string & Tag2): void;
+>doThis2 : Symbol(doThis2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 13, 71))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 14, 25))
+>Tag2 : Symbol(Tag2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 9, 1))
+
+declare function doThat2(value: string) : void;
+>doThat2 : Symbol(doThat2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 14, 53))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 15, 25))
+
+if (isNonBlank2(value)) {
+>isNonBlank2 : Symbol(isNonBlank2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 12, 18))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+
+    doThis2(value);
+>doThis2 : Symbol(doThis2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 13, 71))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+
+} else {
+    doThat2(value);
+>doThat2 : Symbol(doThat2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 14, 53))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+}
+
diff --git a/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.types b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.types
new file mode 100644
index 00000000000..478363669b4
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.types
@@ -0,0 +1,76 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts ===
+type Tag = {__tag: any};
+>Tag : { __tag: any; }
+>__tag : any
+
+declare function isNonBlank(value: string) : value is (string & Tag);
+>isNonBlank : (value: string) => value is string & { __tag: any; }
+>value : string
+>value : any
+>Tag : { __tag: any; }
+
+declare function doThis(value: string & Tag): void;
+>doThis : (value: string & { __tag: any; }) => void
+>value : string & { __tag: any; }
+>Tag : { __tag: any; }
+
+declare function doThat(value: string) : void;
+>doThat : (value: string) => void
+>value : string
+
+let value: string;
+>value : string
+
+if (isNonBlank(value)) {
+>isNonBlank(value) : boolean
+>isNonBlank : (value: string) => value is string & { __tag: any; }
+>value : string
+
+    doThis(value);
+>doThis(value) : void
+>doThis : (value: string & { __tag: any; }) => void
+>value : string & { __tag: any; }
+
+} else {
+    doThat(value);
+>doThat(value) : void
+>doThat : (value: string) => void
+>value : string
+}
+
+
+const enum Tag2 {}
+>Tag2 : Tag2
+
+declare function isNonBlank2(value: string) : value is (string & Tag2);
+>isNonBlank2 : (value: string) => value is string & Tag2
+>value : string
+>value : any
+>Tag2 : Tag2
+
+declare function doThis2(value: string & Tag2): void;
+>doThis2 : (value: string & Tag2) => void
+>value : string & Tag2
+>Tag2 : Tag2
+
+declare function doThat2(value: string) : void;
+>doThat2 : (value: string) => void
+>value : string
+
+if (isNonBlank2(value)) {
+>isNonBlank2(value) : boolean
+>isNonBlank2 : (value: string) => value is string & Tag2
+>value : string
+
+    doThis2(value);
+>doThis2(value) : void
+>doThis2 : (value: string & Tag2) => void
+>value : string & Tag2
+
+} else {
+    doThat2(value);
+>doThat2(value) : void
+>doThat2 : (value: string) => void
+>value : string
+}
+
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts
new file mode 100644
index 00000000000..376a78275c8
--- /dev/null
+++ b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts
@@ -0,0 +1,21 @@
+type Tag = {__tag: any};
+declare function isNonBlank(value: string) : value is (string & Tag);
+declare function doThis(value: string & Tag): void;
+declare function doThat(value: string) : void;
+let value: string;
+if (isNonBlank(value)) {
+    doThis(value);
+} else {
+    doThat(value);
+}
+
+
+const enum Tag2 {}
+declare function isNonBlank2(value: string) : value is (string & Tag2);
+declare function doThis2(value: string & Tag2): void;
+declare function doThat2(value: string) : void;
+if (isNonBlank2(value)) {
+    doThis2(value);
+} else {
+    doThat2(value);
+}

From a2feb0ee7dc07aad3ef9d05e2ea151c547fd460d Mon Sep 17 00:00:00 2001
From: Wesley Wigham <wwigham@gmail.com>
Date: Fri, 11 Mar 2016 02:24:26 -0500
Subject: [PATCH 030/332] string literal case test

---
 .../typeGuardNarrowsToLiteralType.js          | 21 +++++++++++
 .../typeGuardNarrowsToLiteralType.symbols     | 32 +++++++++++++++++
 .../typeGuardNarrowsToLiteralType.types       | 35 +++++++++++++++++++
 .../typeGuardNarrowsToLiteralType.ts          | 10 ++++++
 4 files changed, 98 insertions(+)
 create mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralType.js
 create mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralType.symbols
 create mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralType.types
 create mode 100644 tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts

diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralType.js b/tests/baselines/reference/typeGuardNarrowsToLiteralType.js
new file mode 100644
index 00000000000..fdd2ee3fb7f
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsToLiteralType.js
@@ -0,0 +1,21 @@
+//// [typeGuardNarrowsToLiteralType.ts]
+declare function isFoo(value: string) : value is "foo";
+declare function doThis(value: "foo"): void;
+declare function doThat(value: string) : void;
+let value: string;
+if (isFoo(value)) {
+    doThis(value);
+} else {
+    doThat(value);
+}
+
+
+
+//// [typeGuardNarrowsToLiteralType.js]
+var value;
+if (isFoo(value)) {
+    doThis(value);
+}
+else {
+    doThat(value);
+}
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralType.symbols b/tests/baselines/reference/typeGuardNarrowsToLiteralType.symbols
new file mode 100644
index 00000000000..0d0ddc5f00d
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsToLiteralType.symbols
@@ -0,0 +1,32 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts ===
+declare function isFoo(value: string) : value is "foo";
+>isFoo : Symbol(isFoo, Decl(typeGuardNarrowsToLiteralType.ts, 0, 0))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 0, 23))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 0, 23))
+
+declare function doThis(value: "foo"): void;
+>doThis : Symbol(doThis, Decl(typeGuardNarrowsToLiteralType.ts, 0, 55))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 1, 24))
+
+declare function doThat(value: string) : void;
+>doThat : Symbol(doThat, Decl(typeGuardNarrowsToLiteralType.ts, 1, 44))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 2, 24))
+
+let value: string;
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 3, 3))
+
+if (isFoo(value)) {
+>isFoo : Symbol(isFoo, Decl(typeGuardNarrowsToLiteralType.ts, 0, 0))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 3, 3))
+
+    doThis(value);
+>doThis : Symbol(doThis, Decl(typeGuardNarrowsToLiteralType.ts, 0, 55))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 3, 3))
+
+} else {
+    doThat(value);
+>doThat : Symbol(doThat, Decl(typeGuardNarrowsToLiteralType.ts, 1, 44))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 3, 3))
+}
+
+
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralType.types b/tests/baselines/reference/typeGuardNarrowsToLiteralType.types
new file mode 100644
index 00000000000..9835206deb9
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsToLiteralType.types
@@ -0,0 +1,35 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts ===
+declare function isFoo(value: string) : value is "foo";
+>isFoo : (value: string) => value is "foo"
+>value : string
+>value : any
+
+declare function doThis(value: "foo"): void;
+>doThis : (value: "foo") => void
+>value : "foo"
+
+declare function doThat(value: string) : void;
+>doThat : (value: string) => void
+>value : string
+
+let value: string;
+>value : string
+
+if (isFoo(value)) {
+>isFoo(value) : boolean
+>isFoo : (value: string) => value is "foo"
+>value : string
+
+    doThis(value);
+>doThis(value) : void
+>doThis : (value: "foo") => void
+>value : "foo"
+
+} else {
+    doThat(value);
+>doThat(value) : void
+>doThat : (value: string) => void
+>value : string
+}
+
+
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts
new file mode 100644
index 00000000000..3b7d5bba21a
--- /dev/null
+++ b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts
@@ -0,0 +1,10 @@
+declare function isFoo(value: string) : value is "foo";
+declare function doThis(value: "foo"): void;
+declare function doThat(value: string) : void;
+let value: string;
+if (isFoo(value)) {
+    doThis(value);
+} else {
+    doThat(value);
+}
+

From 92bf91dd581b98e9c9fd0c8d69dae6132af762ef Mon Sep 17 00:00:00 2001
From: Wesley Wigham <wwigham@gmail.com>
Date: Tue, 26 Apr 2016 04:14:00 -0400
Subject: [PATCH 031/332] Reconcile fix with CFA work

---
 src/compiler/checker.ts | 4 ++--
 src/compiler/types.ts   | 8 +++++++-
 2 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 6a42dc43d51..ca0d61c8106 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7555,7 +7555,7 @@ namespace ts {
         }
 
         function getNarrowedTypeOfReference(type: Type, reference: Node) {
-            if (!(type.flags & TypeFlags.Narrowable) || !isNarrowableReference(reference)) {
+            if (type.flags & TypeFlags.Defaultable || !isNarrowableReference(reference)) {
                 return type;
             }
             const leftmostNode = getLeftmostIdentifierOrThis(reference);
@@ -7975,7 +7975,7 @@ namespace ts {
             const defaultsToDeclaredType = !strictNullChecks || type.flags & TypeFlags.Any || !declaration ||
                 declaration.kind === SyntaxKind.Parameter || isInAmbientContext(declaration) ||
                 getContainingFunctionOrModule(declaration) !== getContainingFunctionOrModule(node);
-            if (defaultsToDeclaredType && !(type.flags & TypeFlags.Narrowable)) {
+            if (defaultsToDeclaredType && type.flags & TypeFlags.Defaultable) {
                 return type;
             }
             const flowType = getFlowTypeOfReference(node, type, defaultsToDeclaredType ? type : undefinedType);
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index d0d411a710e..5f181bc982e 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2175,7 +2175,13 @@ namespace ts {
         ObjectType = Class | Interface | Reference | Tuple | Anonymous,
         UnionOrIntersection = Union | Intersection,
         StructuredType = ObjectType | Union | Intersection,
-        Narrowable = Any | ObjectType | Union | TypeParameter,
+
+        // 'Defaultable' types are types where narrowing reverts to the original type, rather than actually narrow.
+        // This is never really correct - you can _always_ narrow to an intersection with that type, _but_ we keep
+        // Void as the only defaultable type, since it's a non-value type construct (representing a lack of a value)
+        // and, generally speaking, narrowing `void` should fail in some way, as it is nonsensical. (`void` narrowing
+        // to `void & T`, in a structural sense, is just narrowing to T, which we wouldn't allow under normal rules)
+        Defaultable = Void,
         /* @internal */
         RequiresWidening = ContainsUndefinedOrNull | ContainsObjectLiteral,
         /* @internal */

From 73d4aaef46eea2323587edb650678c2fe70aa170 Mon Sep 17 00:00:00 2001
From: Wesley Wigham <wwigham@gmail.com>
Date: Tue, 26 Apr 2016 04:17:40 -0400
Subject: [PATCH 032/332] Defaultable -> NotNarrowable to align with use

---
 src/compiler/checker.ts | 4 ++--
 src/compiler/types.ts   | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index ca0d61c8106..2e2f59f6c15 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7555,7 +7555,7 @@ namespace ts {
         }
 
         function getNarrowedTypeOfReference(type: Type, reference: Node) {
-            if (type.flags & TypeFlags.Defaultable || !isNarrowableReference(reference)) {
+            if (type.flags & TypeFlags.NotNarrowable || !isNarrowableReference(reference)) {
                 return type;
             }
             const leftmostNode = getLeftmostIdentifierOrThis(reference);
@@ -7975,7 +7975,7 @@ namespace ts {
             const defaultsToDeclaredType = !strictNullChecks || type.flags & TypeFlags.Any || !declaration ||
                 declaration.kind === SyntaxKind.Parameter || isInAmbientContext(declaration) ||
                 getContainingFunctionOrModule(declaration) !== getContainingFunctionOrModule(node);
-            if (defaultsToDeclaredType && type.flags & TypeFlags.Defaultable) {
+            if (defaultsToDeclaredType && type.flags & TypeFlags.NotNarrowable) {
                 return type;
             }
             const flowType = getFlowTypeOfReference(node, type, defaultsToDeclaredType ? type : undefinedType);
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 5f181bc982e..47f9d1b752e 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2176,12 +2176,12 @@ namespace ts {
         UnionOrIntersection = Union | Intersection,
         StructuredType = ObjectType | Union | Intersection,
 
-        // 'Defaultable' types are types where narrowing reverts to the original type, rather than actually narrow.
+        // 'NotNarrowable' types are types where narrowing reverts to the original type, rather than actually narrow.
         // This is never really correct - you can _always_ narrow to an intersection with that type, _but_ we keep
         // Void as the only defaultable type, since it's a non-value type construct (representing a lack of a value)
         // and, generally speaking, narrowing `void` should fail in some way, as it is nonsensical. (`void` narrowing
         // to `void & T`, in a structural sense, is just narrowing to T, which we wouldn't allow under normal rules)
-        Defaultable = Void,
+        NotNarrowable = Void,
         /* @internal */
         RequiresWidening = ContainsUndefinedOrNull | ContainsObjectLiteral,
         /* @internal */

From 70733da2f2013ef786486d64a6dce7efae504298 Mon Sep 17 00:00:00 2001
From: Wesley Wigham <wwigham@gmail.com>
Date: Tue, 26 Apr 2016 04:23:54 -0400
Subject: [PATCH 033/332] Missed a defaultable in comments

---
 src/compiler/types.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 47f9d1b752e..044cf3f4e8b 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2178,7 +2178,7 @@ namespace ts {
 
         // 'NotNarrowable' types are types where narrowing reverts to the original type, rather than actually narrow.
         // This is never really correct - you can _always_ narrow to an intersection with that type, _but_ we keep
-        // Void as the only defaultable type, since it's a non-value type construct (representing a lack of a value)
+        // Void as the only non-narrowable type, since it's a non-value type construct (representing a lack of a value)
         // and, generally speaking, narrowing `void` should fail in some way, as it is nonsensical. (`void` narrowing
         // to `void & T`, in a structural sense, is just narrowing to T, which we wouldn't allow under normal rules)
         NotNarrowable = Void,

From a80529b9899ebe105f6e72a176f4bdf6c5eb1586 Mon Sep 17 00:00:00 2001
From: Wesley Wigham <wwigham@gmail.com>
Date: Tue, 26 Apr 2016 04:37:00 -0400
Subject: [PATCH 034/332] Add test for narrowing to unions of string literals

---
 .../typeGuardNarrowsToLiteralTypeUnion.js     | 21 +++++++++++
 ...typeGuardNarrowsToLiteralTypeUnion.symbols | 32 +++++++++++++++++
 .../typeGuardNarrowsToLiteralTypeUnion.types  | 35 +++++++++++++++++++
 .../typeGuardNarrowsToLiteralTypeUnion.ts     | 10 ++++++
 4 files changed, 98 insertions(+)
 create mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.js
 create mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.symbols
 create mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.types
 create mode 100644 tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts

diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.js b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.js
new file mode 100644
index 00000000000..715b362c8e0
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.js
@@ -0,0 +1,21 @@
+//// [typeGuardNarrowsToLiteralTypeUnion.ts]
+declare function isFoo(value: string) : value is ("foo" | "bar");
+declare function doThis(value: "foo" | "bar"): void;
+declare function doThat(value: string) : void;
+let value: string;
+if (isFoo(value)) {
+    doThis(value);
+} else {
+    doThat(value);
+}
+
+
+
+//// [typeGuardNarrowsToLiteralTypeUnion.js]
+var value;
+if (isFoo(value)) {
+    doThis(value);
+}
+else {
+    doThat(value);
+}
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.symbols b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.symbols
new file mode 100644
index 00000000000..356fa06a06c
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.symbols
@@ -0,0 +1,32 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts ===
+declare function isFoo(value: string) : value is ("foo" | "bar");
+>isFoo : Symbol(isFoo, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 0))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 23))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 23))
+
+declare function doThis(value: "foo" | "bar"): void;
+>doThis : Symbol(doThis, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 65))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 1, 24))
+
+declare function doThat(value: string) : void;
+>doThat : Symbol(doThat, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 1, 52))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 2, 24))
+
+let value: string;
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 3, 3))
+
+if (isFoo(value)) {
+>isFoo : Symbol(isFoo, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 0))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 3, 3))
+
+    doThis(value);
+>doThis : Symbol(doThis, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 65))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 3, 3))
+
+} else {
+    doThat(value);
+>doThat : Symbol(doThat, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 1, 52))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 3, 3))
+}
+
+
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.types b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.types
new file mode 100644
index 00000000000..321a8861d55
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.types
@@ -0,0 +1,35 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts ===
+declare function isFoo(value: string) : value is ("foo" | "bar");
+>isFoo : (value: string) => value is "foo" | "bar"
+>value : string
+>value : any
+
+declare function doThis(value: "foo" | "bar"): void;
+>doThis : (value: "foo" | "bar") => void
+>value : "foo" | "bar"
+
+declare function doThat(value: string) : void;
+>doThat : (value: string) => void
+>value : string
+
+let value: string;
+>value : string
+
+if (isFoo(value)) {
+>isFoo(value) : boolean
+>isFoo : (value: string) => value is "foo" | "bar"
+>value : string
+
+    doThis(value);
+>doThis(value) : void
+>doThis : (value: "foo" | "bar") => void
+>value : "foo" | "bar"
+
+} else {
+    doThat(value);
+>doThat(value) : void
+>doThat : (value: string) => void
+>value : string
+}
+
+
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts
new file mode 100644
index 00000000000..8f4726160f4
--- /dev/null
+++ b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts
@@ -0,0 +1,10 @@
+declare function isFoo(value: string) : value is ("foo" | "bar");
+declare function doThis(value: "foo" | "bar"): void;
+declare function doThat(value: string) : void;
+let value: string;
+if (isFoo(value)) {
+    doThis(value);
+} else {
+    doThat(value);
+}
+

From 21587aaae3be8bf7840ab8be66793d4d4b32e1f2 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Mon, 2 May 2016 16:29:53 -0700
Subject: [PATCH 035/332] Rewrite isInStringLiteral to accomodate for
 unterminated strings

---
 src/services/utilities.ts | 24 +++++++++++++++++++++---
 1 file changed, 21 insertions(+), 3 deletions(-)

diff --git a/src/services/utilities.ts b/src/services/utilities.ts
index 270c7d85d45..a625a2d6476 100644
--- a/src/services/utilities.ts
+++ b/src/services/utilities.ts
@@ -401,9 +401,27 @@ namespace ts {
         }
     }
 
-    export function isInString(sourceFile: SourceFile, position: number) {
-        let token = getTokenAtPosition(sourceFile, position);
-        return token && (token.kind === SyntaxKind.StringLiteral || token.kind === SyntaxKind.StringLiteralType) && position > token.getStart(sourceFile);
+    export function isInString(sourceFile: SourceFile, position: number): boolean {
+        const previousToken = findPrecedingToken(position, sourceFile);
+        if (previousToken &&
+            (previousToken.kind === SyntaxKind.StringLiteral || previousToken.kind === SyntaxKind.StringLiteralType)) {
+            const start = previousToken.getStart();
+            const end = previousToken.getEnd();
+
+            // To be "in" one of these literals, the position has to be:
+            //   1. entirely within the token text.
+            //   2. at the end position of an unterminated token.
+            //   3. at the end of a regular expression (due to trailing flags like '/foo/g').
+            if (start < position && position < end) {
+                return true;
+            }
+
+            if (position === end) {
+                return !!(<LiteralExpression>previousToken).isUnterminated;
+            }
+        }
+
+        return false;
     }
 
     export function isInComment(sourceFile: SourceFile, position: number) {

From 0a277a1c601153c355dc76454cfebd770bf4cea9 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Mon, 2 May 2016 16:30:18 -0700
Subject: [PATCH 036/332] Refactor signatureHelp to expose helper functions

---
 src/services/signatureHelp.ts | 786 +++++++++++++++++-----------------
 1 file changed, 393 insertions(+), 393 deletions(-)

diff --git a/src/services/signatureHelp.ts b/src/services/signatureHelp.ts
index 9e8a2f14ed8..fa7cc42e0d1 100644
--- a/src/services/signatureHelp.ts
+++ b/src/services/signatureHelp.ts
@@ -170,7 +170,7 @@ namespace ts.SignatureHelp {
         TaggedTemplateArguments
     }
 
-    interface ArgumentListInfo {
+    export interface ArgumentListInfo {
         kind: ArgumentListKind;
         invocation: CallLikeExpression;
         argumentsSpan: TextSpan;
@@ -188,7 +188,7 @@ namespace ts.SignatureHelp {
             return undefined;
         }
 
-        let argumentInfo = getContainingArgumentInfo(startingToken);
+        let argumentInfo = getContainingArgumentInfo(startingToken, position, sourceFile);
         cancellationToken.throwIfCancellationRequested();
 
         // Semantic filtering of signature help
@@ -205,431 +205,431 @@ namespace ts.SignatureHelp {
             // We didn't have any sig help items produced by the TS compiler.  If this is a JS 
             // file, then see if we can figure out anything better.
             if (isSourceFileJavaScript(sourceFile)) {
-                return createJavaScriptSignatureHelpItems(argumentInfo);
+                return createJavaScriptSignatureHelpItems(argumentInfo, program);
             }
 
             return undefined;
         }
 
-        return createSignatureHelpItems(candidates, resolvedSignature, argumentInfo);
+        return createSignatureHelpItems(candidates, resolvedSignature, argumentInfo, typeChecker);
+    }
 
-        function createJavaScriptSignatureHelpItems(argumentInfo: ArgumentListInfo): SignatureHelpItems {
-            if (argumentInfo.invocation.kind !== SyntaxKind.CallExpression) {
-                return undefined;
-            }
+    function createJavaScriptSignatureHelpItems(argumentInfo: ArgumentListInfo, program: Program): SignatureHelpItems {
+        if (argumentInfo.invocation.kind !== SyntaxKind.CallExpression) {
+            return undefined;
+        }
 
-            // See if we can find some symbol with the call expression name that has call signatures.
-            let callExpression = <CallExpression>argumentInfo.invocation;
-            let expression = callExpression.expression;
-            let name = expression.kind === SyntaxKind.Identifier
-                ? <Identifier> expression
-                : expression.kind === SyntaxKind.PropertyAccessExpression
-                    ? (<PropertyAccessExpression>expression).name
-                    : undefined;
+        // See if we can find some symbol with the call expression name that has call signatures.
+        let callExpression = <CallExpression>argumentInfo.invocation;
+        let expression = callExpression.expression;
+        let name = expression.kind === SyntaxKind.Identifier
+            ? <Identifier>expression
+            : expression.kind === SyntaxKind.PropertyAccessExpression
+                ? (<PropertyAccessExpression>expression).name
+                : undefined;
 
-            if (!name || !name.text) {
-                return undefined;
-            }
+        if (!name || !name.text) {
+            return undefined;
+        }
 
-            let typeChecker = program.getTypeChecker();
-            for (let sourceFile of program.getSourceFiles()) {
-                let nameToDeclarations = sourceFile.getNamedDeclarations();
-                let declarations = getProperty(nameToDeclarations, name.text);
+        let typeChecker = program.getTypeChecker();
+        for (let sourceFile of program.getSourceFiles()) {
+            let nameToDeclarations = sourceFile.getNamedDeclarations();
+            let declarations = getProperty(nameToDeclarations, name.text);
 
-                if (declarations) {
-                    for (let declaration of declarations) {
-                        let symbol = declaration.symbol;
-                        if (symbol) {
-                            let type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
-                            if (type) {
-                                let callSignatures = type.getCallSignatures();
-                                if (callSignatures && callSignatures.length) {
-                                    return createSignatureHelpItems(callSignatures, callSignatures[0], argumentInfo);
-                                }
+            if (declarations) {
+                for (let declaration of declarations) {
+                    let symbol = declaration.symbol;
+                    if (symbol) {
+                        let type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
+                        if (type) {
+                            let callSignatures = type.getCallSignatures();
+                            if (callSignatures && callSignatures.length) {
+                                return createSignatureHelpItems(callSignatures, callSignatures[0], argumentInfo, typeChecker);
                             }
                         }
                     }
                 }
             }
         }
+    }
 
-        /**
-         * Returns relevant information for the argument list and the current argument if we are
-         * in the argument of an invocation; returns undefined otherwise.
-         */
-        function getImmediatelyContainingArgumentInfo(node: Node): ArgumentListInfo {
-            if (node.parent.kind === SyntaxKind.CallExpression || node.parent.kind === SyntaxKind.NewExpression) {
-                let callExpression = <CallExpression>node.parent;
-                // There are 3 cases to handle:
-                //   1. The token introduces a list, and should begin a sig help session
-                //   2. The token is either not associated with a list, or ends a list, so the session should end
-                //   3. The token is buried inside a list, and should give sig help
-                //
-                // The following are examples of each:
-                //
-                //    Case 1:
-                //          foo<#T, U>(#a, b)    -> The token introduces a list, and should begin a sig help session
-                //    Case 2:
-                //          fo#o<T, U>#(a, b)#   -> The token is either not associated with a list, or ends a list, so the session should end
-                //    Case 3:
-                //          foo<T#, U#>(a#, #b#) -> The token is buried inside a list, and should give sig help
-                // Find out if 'node' is an argument, a type argument, or neither
-                if (node.kind === SyntaxKind.LessThanToken ||
-                    node.kind === SyntaxKind.OpenParenToken) {
-                    // Find the list that starts right *after* the < or ( token.
-                    // If the user has just opened a list, consider this item 0.
-                    let list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
-                    let isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
-                    Debug.assert(list !== undefined);
-                    return {
-                        kind: isTypeArgList ? ArgumentListKind.TypeArguments : ArgumentListKind.CallArguments,
-                        invocation: callExpression,
-                        argumentsSpan: getApplicableSpanForArguments(list),
-                        argumentIndex: 0,
-                        argumentCount: getArgumentCount(list)
-                    };
-                }
-
-                // findListItemInfo can return undefined if we are not in parent's argument list
-                // or type argument list. This includes cases where the cursor is:
-                //   - To the right of the closing paren, non-substitution template, or template tail.
-                //   - Between the type arguments and the arguments (greater than token)
-                //   - On the target of the call (parent.func)
-                //   - On the 'new' keyword in a 'new' expression
-                let listItemInfo = findListItemInfo(node);
-                if (listItemInfo) {
-                    let list = listItemInfo.list;
-                    let isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
-
-                    let argumentIndex = getArgumentIndex(list, node);
-                    let argumentCount = getArgumentCount(list);
-
-                    Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount,
-                        `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`); 
-
-                    return {
-                        kind: isTypeArgList ? ArgumentListKind.TypeArguments : ArgumentListKind.CallArguments,
-                        invocation: callExpression,
-                        argumentsSpan: getApplicableSpanForArguments(list),
-                        argumentIndex: argumentIndex,
-                        argumentCount: argumentCount
-                    };
-                }
-            }
-            else if (node.kind === SyntaxKind.NoSubstitutionTemplateLiteral && node.parent.kind === SyntaxKind.TaggedTemplateExpression) {
-                // Check if we're actually inside the template;
-                // otherwise we'll fall out and return undefined.
-                if (isInsideTemplateLiteral(<LiteralExpression>node, position)) {
-                    return getArgumentListInfoForTemplate(<TaggedTemplateExpression>node.parent, /*argumentIndex*/ 0);
-                }
-            }
-            else if (node.kind === SyntaxKind.TemplateHead && node.parent.parent.kind === SyntaxKind.TaggedTemplateExpression) {
-                let templateExpression = <TemplateExpression>node.parent;
-                let tagExpression = <TaggedTemplateExpression>templateExpression.parent;
-                Debug.assert(templateExpression.kind === SyntaxKind.TemplateExpression);
-
-                let argumentIndex = isInsideTemplateLiteral(<LiteralExpression>node, position) ? 0 : 1;
-
-                return getArgumentListInfoForTemplate(tagExpression, argumentIndex);
-            }
-            else if (node.parent.kind === SyntaxKind.TemplateSpan && node.parent.parent.parent.kind === SyntaxKind.TaggedTemplateExpression) {
-                let templateSpan = <TemplateSpan>node.parent;
-                let templateExpression = <TemplateExpression>templateSpan.parent;
-                let tagExpression = <TaggedTemplateExpression>templateExpression.parent;
-                Debug.assert(templateExpression.kind === SyntaxKind.TemplateExpression);
-
-                // If we're just after a template tail, don't show signature help.
-                if (node.kind === SyntaxKind.TemplateTail && !isInsideTemplateLiteral(<LiteralExpression>node, position)) {
-                    return undefined;
-                }
-
-                let spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
-                let argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node);
-
-                return getArgumentListInfoForTemplate(tagExpression, argumentIndex);
-            }
-            
-            return undefined;
-        }
-
-        function getArgumentIndex(argumentsList: Node, node: Node) {
-            // The list we got back can include commas.  In the presence of errors it may 
-            // also just have nodes without commas.  For example "Foo(a b c)" will have 3 
-            // args without commas.   We want to find what index we're at.  So we count
-            // forward until we hit ourselves, only incrementing the index if it isn't a
-            // comma.
+    /**
+     * Returns relevant information for the argument list and the current argument if we are
+     * in the argument of an invocation; returns undefined otherwise.
+     */
+    function getImmediatelyContainingArgumentInfo(node: Node, position: number, sourceFile: SourceFile): ArgumentListInfo {
+        if (node.parent.kind === SyntaxKind.CallExpression || node.parent.kind === SyntaxKind.NewExpression) {
+            let callExpression = <CallExpression>node.parent;
+            // There are 3 cases to handle:
+            //   1. The token introduces a list, and should begin a sig help session
+            //   2. The token is either not associated with a list, or ends a list, so the session should end
+            //   3. The token is buried inside a list, and should give sig help
             //
-            // Note: the subtlety around trailing commas (in getArgumentCount) does not apply
-            // here.  That's because we're only walking forward until we hit the node we're
-            // on.  In that case, even if we're after the trailing comma, we'll still see
-            // that trailing comma in the list, and we'll have generated the appropriate
-            // arg index.
-            let argumentIndex = 0;
-            let listChildren = argumentsList.getChildren();
-            for (let child of listChildren) {
-                if (child === node) {
-                    break;
-                }
-                if (child.kind !== SyntaxKind.CommaToken) {
-                    argumentIndex++;
-                }
-            }
-
-            return argumentIndex;
-        }
-
-        function getArgumentCount(argumentsList: Node) {
-            // The argument count for a list is normally the number of non-comma children it has.
-            // For example, if you have "Foo(a,b)" then there will be three children of the arg
-            // list 'a' '<comma>' 'b'.  So, in this case the arg count will be 2.  However, there
-            // is a small subtlety.  If you have  "Foo(a,)", then the child list will just have
-            // 'a' '<comma>'.  So, in the case where the last child is a comma, we increase the
-            // arg count by one to compensate.
+            // The following are examples of each:
             //
-            // Note: this subtlety only applies to the last comma.  If you had "Foo(a,,"  then 
-            // we'll have:  'a' '<comma>' '<missing>' 
-            // That will give us 2 non-commas.  We then add one for the last comma, givin us an
-            // arg count of 3.
-            let listChildren = argumentsList.getChildren();
-
-            let argumentCount = countWhere(listChildren, arg => arg.kind !== SyntaxKind.CommaToken);
-            if (listChildren.length > 0 && lastOrUndefined(listChildren).kind === SyntaxKind.CommaToken) {
-                argumentCount++;
+            //    Case 1:
+            //          foo<#T, U>(#a, b)    -> The token introduces a list, and should begin a sig help session
+            //    Case 2:
+            //          fo#o<T, U>#(a, b)#   -> The token is either not associated with a list, or ends a list, so the session should end
+            //    Case 3:
+            //          foo<T#, U#>(a#, #b#) -> The token is buried inside a list, and should give sig help
+            // Find out if 'node' is an argument, a type argument, or neither
+            if (node.kind === SyntaxKind.LessThanToken ||
+                node.kind === SyntaxKind.OpenParenToken) {
+                // Find the list that starts right *after* the < or ( token.
+                // If the user has just opened a list, consider this item 0.
+                let list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
+                let isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
+                Debug.assert(list !== undefined);
+                return {
+                    kind: isTypeArgList ? ArgumentListKind.TypeArguments : ArgumentListKind.CallArguments,
+                    invocation: callExpression,
+                    argumentsSpan: getApplicableSpanForArguments(list, sourceFile),
+                    argumentIndex: 0,
+                    argumentCount: getArgumentCount(list)
+                };
             }
 
-            return argumentCount;
-        }
+            // findListItemInfo can return undefined if we are not in parent's argument list
+            // or type argument list. This includes cases where the cursor is:
+            //   - To the right of the closing paren, non-substitution template, or template tail.
+            //   - Between the type arguments and the arguments (greater than token)
+            //   - On the target of the call (parent.func)
+            //   - On the 'new' keyword in a 'new' expression
+            let listItemInfo = findListItemInfo(node);
+            if (listItemInfo) {
+                let list = listItemInfo.list;
+                let isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
 
-        // spanIndex is either the index for a given template span.
-        // This does not give appropriate results for a NoSubstitutionTemplateLiteral
-        function getArgumentIndexForTemplatePiece(spanIndex: number, node: Node): number {
-            // Because the TemplateStringsArray is the first argument, we have to offset each substitution expression by 1.
-            // There are three cases we can encounter:
-            //      1. We are precisely in the template literal (argIndex = 0).
-            //      2. We are in or to the right of the substitution expression (argIndex = spanIndex + 1).
-            //      3. We are directly to the right of the template literal, but because we look for the token on the left,
-            //          not enough to put us in the substitution expression; we should consider ourselves part of
-            //          the *next* span's expression by offsetting the index (argIndex = (spanIndex + 1) + 1).
-            //
-            // Example: f  `# abcd $#{#  1 + 1#  }# efghi ${ #"#hello"#  }  #  `
-            //              ^       ^ ^       ^   ^          ^ ^      ^     ^
-            // Case:        1       1 3       2   1          3 2      2     1
-            Debug.assert(position >= node.getStart(), "Assumed 'position' could not occur before node.");
-            if (isTemplateLiteralKind(node.kind)) {
-                if (isInsideTemplateLiteral(<LiteralExpression>node, position)) {
-                    return 0;
-                }
-                return spanIndex + 2;
+                let argumentIndex = getArgumentIndex(list, node);
+                let argumentCount = getArgumentCount(list);
+
+                Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount,
+                    `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`);
+
+                return {
+                    kind: isTypeArgList ? ArgumentListKind.TypeArguments : ArgumentListKind.CallArguments,
+                    invocation: callExpression,
+                    argumentsSpan: getApplicableSpanForArguments(list, sourceFile),
+                    argumentIndex: argumentIndex,
+                    argumentCount: argumentCount
+                };
             }
-            return spanIndex + 1;
+        }
+        else if (node.kind === SyntaxKind.NoSubstitutionTemplateLiteral && node.parent.kind === SyntaxKind.TaggedTemplateExpression) {
+            // Check if we're actually inside the template;
+            // otherwise we'll fall out and return undefined.
+            if (isInsideTemplateLiteral(<LiteralExpression>node, position)) {
+                return getArgumentListInfoForTemplate(<TaggedTemplateExpression>node.parent, /*argumentIndex*/ 0, sourceFile);
+            }
+        }
+        else if (node.kind === SyntaxKind.TemplateHead && node.parent.parent.kind === SyntaxKind.TaggedTemplateExpression) {
+            let templateExpression = <TemplateExpression>node.parent;
+            let tagExpression = <TaggedTemplateExpression>templateExpression.parent;
+            Debug.assert(templateExpression.kind === SyntaxKind.TemplateExpression);
+
+            let argumentIndex = isInsideTemplateLiteral(<LiteralExpression>node, position) ? 0 : 1;
+
+            return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
+        }
+        else if (node.parent.kind === SyntaxKind.TemplateSpan && node.parent.parent.parent.kind === SyntaxKind.TaggedTemplateExpression) {
+            let templateSpan = <TemplateSpan>node.parent;
+            let templateExpression = <TemplateExpression>templateSpan.parent;
+            let tagExpression = <TaggedTemplateExpression>templateExpression.parent;
+            Debug.assert(templateExpression.kind === SyntaxKind.TemplateExpression);
+
+            // If we're just after a template tail, don't show signature help.
+            if (node.kind === SyntaxKind.TemplateTail && !isInsideTemplateLiteral(<LiteralExpression>node, position)) {
+                return undefined;
+            }
+
+            let spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
+            let argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node, position);
+
+            return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
         }
 
-        function getArgumentListInfoForTemplate(tagExpression: TaggedTemplateExpression, argumentIndex: number): ArgumentListInfo {
-            // argumentCount is either 1 or (numSpans + 1) to account for the template strings array argument.
-            let argumentCount = tagExpression.template.kind === SyntaxKind.NoSubstitutionTemplateLiteral
-                ? 1
-                : (<TemplateExpression>tagExpression.template).templateSpans.length + 1;
+        return undefined;
+    }
 
-            Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`); 
+    function getArgumentIndex(argumentsList: Node, node: Node) {
+        // The list we got back can include commas.  In the presence of errors it may 
+        // also just have nodes without commas.  For example "Foo(a b c)" will have 3 
+        // args without commas.   We want to find what index we're at.  So we count
+        // forward until we hit ourselves, only incrementing the index if it isn't a
+        // comma.
+        //
+        // Note: the subtlety around trailing commas (in getArgumentCount) does not apply
+        // here.  That's because we're only walking forward until we hit the node we're
+        // on.  In that case, even if we're after the trailing comma, we'll still see
+        // that trailing comma in the list, and we'll have generated the appropriate
+        // arg index.
+        let argumentIndex = 0;
+        let listChildren = argumentsList.getChildren();
+        for (let child of listChildren) {
+            if (child === node) {
+                break;
+            }
+            if (child.kind !== SyntaxKind.CommaToken) {
+                argumentIndex++;
+            }
+        }
+
+        return argumentIndex;
+    }
+
+    function getArgumentCount(argumentsList: Node) {
+        // The argument count for a list is normally the number of non-comma children it has.
+        // For example, if you have "Foo(a,b)" then there will be three children of the arg
+        // list 'a' '<comma>' 'b'.  So, in this case the arg count will be 2.  However, there
+        // is a small subtlety.  If you have  "Foo(a,)", then the child list will just have
+        // 'a' '<comma>'.  So, in the case where the last child is a comma, we increase the
+        // arg count by one to compensate.
+        //
+        // Note: this subtlety only applies to the last comma.  If you had "Foo(a,,"  then 
+        // we'll have:  'a' '<comma>' '<missing>' 
+        // That will give us 2 non-commas.  We then add one for the last comma, givin us an
+        // arg count of 3.
+        let listChildren = argumentsList.getChildren();
+
+        let argumentCount = countWhere(listChildren, arg => arg.kind !== SyntaxKind.CommaToken);
+        if (listChildren.length > 0 && lastOrUndefined(listChildren).kind === SyntaxKind.CommaToken) {
+            argumentCount++;
+        }
+
+        return argumentCount;
+    }
+
+    // spanIndex is either the index for a given template span.
+    // This does not give appropriate results for a NoSubstitutionTemplateLiteral
+    function getArgumentIndexForTemplatePiece(spanIndex: number, node: Node, position: number): number {
+        // Because the TemplateStringsArray is the first argument, we have to offset each substitution expression by 1.
+        // There are three cases we can encounter:
+        //      1. We are precisely in the template literal (argIndex = 0).
+        //      2. We are in or to the right of the substitution expression (argIndex = spanIndex + 1).
+        //      3. We are directly to the right of the template literal, but because we look for the token on the left,
+        //          not enough to put us in the substitution expression; we should consider ourselves part of
+        //          the *next* span's expression by offsetting the index (argIndex = (spanIndex + 1) + 1).
+        //
+        // Example: f  `# abcd $#{#  1 + 1#  }# efghi ${ #"#hello"#  }  #  `
+        //              ^       ^ ^       ^   ^          ^ ^      ^     ^
+        // Case:        1       1 3       2   1          3 2      2     1
+        Debug.assert(position >= node.getStart(), "Assumed 'position' could not occur before node.");
+        if (isTemplateLiteralKind(node.kind)) {
+            if (isInsideTemplateLiteral(<LiteralExpression>node, position)) {
+                return 0;
+            }
+            return spanIndex + 2;
+        }
+        return spanIndex + 1;
+    }
+
+    function getArgumentListInfoForTemplate(tagExpression: TaggedTemplateExpression, argumentIndex: number, sourceFile: SourceFile): ArgumentListInfo {
+        // argumentCount is either 1 or (numSpans + 1) to account for the template strings array argument.
+        let argumentCount = tagExpression.template.kind === SyntaxKind.NoSubstitutionTemplateLiteral
+            ? 1
+            : (<TemplateExpression>tagExpression.template).templateSpans.length + 1;
+
+        Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`);
+
+        return {
+            kind: ArgumentListKind.TaggedTemplateArguments,
+            invocation: tagExpression,
+            argumentsSpan: getApplicableSpanForTaggedTemplate(tagExpression, sourceFile),
+            argumentIndex: argumentIndex,
+            argumentCount: argumentCount
+        };
+    }
+
+    function getApplicableSpanForArguments(argumentsList: Node, sourceFile: SourceFile): TextSpan {
+        // We use full start and skip trivia on the end because we want to include trivia on
+        // both sides. For example,
+        //
+        //    foo(   /*comment */     a, b, c      /*comment*/     )
+        //        |                                               |
+        //
+        // The applicable span is from the first bar to the second bar (inclusive,
+        // but not including parentheses)
+        let applicableSpanStart = argumentsList.getFullStart();
+        let applicableSpanEnd = skipTrivia(sourceFile.text, argumentsList.getEnd(), /*stopAfterLineBreak*/ false);
+        return createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
+    }
+
+    function getApplicableSpanForTaggedTemplate(taggedTemplate: TaggedTemplateExpression, sourceFile: SourceFile): TextSpan {
+        let template = taggedTemplate.template;
+        let applicableSpanStart = template.getStart();
+        let applicableSpanEnd = template.getEnd();
+
+        // We need to adjust the end position for the case where the template does not have a tail.
+        // Otherwise, we will not show signature help past the expression.
+        // For example,
+        //
+        //      `  ${ 1 + 1        foo(10)
+        //       |        |
+        //
+        // This is because a Missing node has no width. However, what we actually want is to include trivia
+        // leading up to the next token in case the user is about to type in a TemplateMiddle or TemplateTail.
+        if (template.kind === SyntaxKind.TemplateExpression) {
+            let lastSpan = lastOrUndefined((<TemplateExpression>template).templateSpans);
+            if (lastSpan.literal.getFullWidth() === 0) {
+                applicableSpanEnd = skipTrivia(sourceFile.text, applicableSpanEnd, /*stopAfterLineBreak*/ false);
+            }
+        }
+
+        return createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
+    }
+
+    export function getContainingArgumentInfo(node: Node, position: number, sourceFile: SourceFile): ArgumentListInfo {
+        for (let n = node; n.kind !== SyntaxKind.SourceFile; n = n.parent) {
+            if (isFunctionBlock(n)) {
+                return undefined;
+            }
+
+            // If the node is not a subspan of its parent, this is a big problem.
+            // There have been crashes that might be caused by this violation.
+            if (n.pos < n.parent.pos || n.end > n.parent.end) {
+                Debug.fail("Node of kind " + n.kind + " is not a subspan of its parent of kind " + n.parent.kind);
+            }
+
+            let argumentInfo = getImmediatelyContainingArgumentInfo(n, position, sourceFile);
+            if (argumentInfo) {
+                return argumentInfo;
+            }
+
+
+            // TODO: Handle generic call with incomplete syntax
+        }
+        return undefined;
+    }
+
+    function getChildListThatStartsWithOpenerToken(parent: Node, openerToken: Node, sourceFile: SourceFile): Node {
+        let children = parent.getChildren(sourceFile);
+        let indexOfOpenerToken = children.indexOf(openerToken);
+        Debug.assert(indexOfOpenerToken >= 0 && children.length > indexOfOpenerToken + 1);
+        return children[indexOfOpenerToken + 1];
+    }
+
+    /**
+     * The selectedItemIndex could be negative for several reasons.
+     *     1. There are too many arguments for all of the overloads
+     *     2. None of the overloads were type compatible
+     * The solution here is to try to pick the best overload by picking
+     * either the first one that has an appropriate number of parameters,
+     * or the one with the most parameters.
+     */
+    function selectBestInvalidOverloadIndex(candidates: Signature[], argumentCount: number): number {
+        let maxParamsSignatureIndex = -1;
+        let maxParams = -1;
+        for (let i = 0; i < candidates.length; i++) {
+            let candidate = candidates[i];
+
+            if (candidate.hasRestParameter || candidate.parameters.length >= argumentCount) {
+                return i;
+            }
+
+            if (candidate.parameters.length > maxParams) {
+                maxParams = candidate.parameters.length;
+                maxParamsSignatureIndex = i;
+            }
+        }
+
+        return maxParamsSignatureIndex;
+    }
+
+    function createSignatureHelpItems(candidates: Signature[], bestSignature: Signature, argumentListInfo: ArgumentListInfo, typeChecker: TypeChecker): SignatureHelpItems {
+        let applicableSpan = argumentListInfo.argumentsSpan;
+        let isTypeParameterList = argumentListInfo.kind === ArgumentListKind.TypeArguments;
+
+        let invocation = argumentListInfo.invocation;
+        let callTarget = getInvokedExpression(invocation)
+        let callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
+        let callTargetDisplayParts = callTargetSymbol && symbolToDisplayParts(typeChecker, callTargetSymbol, /*enclosingDeclaration*/ undefined, /*meaning*/ undefined);
+        let items: SignatureHelpItem[] = map(candidates, candidateSignature => {
+            let signatureHelpParameters: SignatureHelpParameter[];
+            let prefixDisplayParts: SymbolDisplayPart[] = [];
+            let suffixDisplayParts: SymbolDisplayPart[] = [];
+
+            if (callTargetDisplayParts) {
+                addRange(prefixDisplayParts, callTargetDisplayParts);
+            }
+
+            if (isTypeParameterList) {
+                prefixDisplayParts.push(punctuationPart(SyntaxKind.LessThanToken));
+                let typeParameters = candidateSignature.typeParameters;
+                signatureHelpParameters = typeParameters && typeParameters.length > 0 ? map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
+                suffixDisplayParts.push(punctuationPart(SyntaxKind.GreaterThanToken));
+                let parameterParts = mapToDisplayParts(writer =>
+                    typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisType, candidateSignature.parameters, writer, invocation));
+                addRange(suffixDisplayParts, parameterParts);
+            }
+            else {
+                let typeParameterParts = mapToDisplayParts(writer =>
+                    typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation));
+                addRange(prefixDisplayParts, typeParameterParts);
+                prefixDisplayParts.push(punctuationPart(SyntaxKind.OpenParenToken));
+
+                let parameters = candidateSignature.parameters;
+                signatureHelpParameters = parameters.length > 0 ? map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
+                suffixDisplayParts.push(punctuationPart(SyntaxKind.CloseParenToken));
+            }
+
+            let returnTypeParts = mapToDisplayParts(writer =>
+                typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation));
+            addRange(suffixDisplayParts, returnTypeParts);
 
             return {
-                kind: ArgumentListKind.TaggedTemplateArguments,
-                invocation: tagExpression,
-                argumentsSpan: getApplicableSpanForTaggedTemplate(tagExpression),
-                argumentIndex: argumentIndex,
-                argumentCount: argumentCount
+                isVariadic: candidateSignature.hasRestParameter,
+                prefixDisplayParts,
+                suffixDisplayParts,
+                separatorDisplayParts: [punctuationPart(SyntaxKind.CommaToken), spacePart()],
+                parameters: signatureHelpParameters,
+                documentation: candidateSignature.getDocumentationComment()
+            };
+        });
+
+        let argumentIndex = argumentListInfo.argumentIndex;
+
+        // argumentCount is the *apparent* number of arguments.
+        let argumentCount = argumentListInfo.argumentCount;
+
+        let selectedItemIndex = candidates.indexOf(bestSignature);
+        if (selectedItemIndex < 0) {
+            selectedItemIndex = selectBestInvalidOverloadIndex(candidates, argumentCount);
+        }
+
+        Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`);
+
+        return {
+            items,
+            applicableSpan,
+            selectedItemIndex,
+            argumentIndex,
+            argumentCount
+        };
+
+        function createSignatureHelpParameterForParameter(parameter: Symbol): SignatureHelpParameter {
+            let displayParts = mapToDisplayParts(writer =>
+                typeChecker.getSymbolDisplayBuilder().buildParameterDisplay(parameter, writer, invocation));
+
+            return {
+                name: parameter.name,
+                documentation: parameter.getDocumentationComment(),
+                displayParts,
+                isOptional: typeChecker.isOptionalParameter(<ParameterDeclaration>parameter.valueDeclaration)
             };
         }
 
-        function getApplicableSpanForArguments(argumentsList: Node): TextSpan {
-            // We use full start and skip trivia on the end because we want to include trivia on
-            // both sides. For example,
-            //
-            //    foo(   /*comment */     a, b, c      /*comment*/     )
-            //        |                                               |
-            //
-            // The applicable span is from the first bar to the second bar (inclusive,
-            // but not including parentheses)
-            let applicableSpanStart = argumentsList.getFullStart();
-            let applicableSpanEnd = skipTrivia(sourceFile.text, argumentsList.getEnd(), /*stopAfterLineBreak*/ false);
-            return createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
-        }
-
-        function getApplicableSpanForTaggedTemplate(taggedTemplate: TaggedTemplateExpression): TextSpan {
-            let template = taggedTemplate.template;
-            let applicableSpanStart = template.getStart();
-            let applicableSpanEnd = template.getEnd();
-
-            // We need to adjust the end position for the case where the template does not have a tail.
-            // Otherwise, we will not show signature help past the expression.
-            // For example,
-            //
-            //      `  ${ 1 + 1        foo(10)
-            //       |        |
-            //
-            // This is because a Missing node has no width. However, what we actually want is to include trivia
-            // leading up to the next token in case the user is about to type in a TemplateMiddle or TemplateTail.
-            if (template.kind === SyntaxKind.TemplateExpression) {
-                let lastSpan = lastOrUndefined((<TemplateExpression>template).templateSpans);
-                if (lastSpan.literal.getFullWidth() === 0) {
-                    applicableSpanEnd = skipTrivia(sourceFile.text, applicableSpanEnd, /*stopAfterLineBreak*/ false);
-                }
-            }
-
-            return createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
-        }
-
-        function getContainingArgumentInfo(node: Node): ArgumentListInfo {
-            for (let n = node; n.kind !== SyntaxKind.SourceFile; n = n.parent) {
-                if (isFunctionBlock(n)) {
-                    return undefined;
-                }
-
-                // If the node is not a subspan of its parent, this is a big problem.
-                // There have been crashes that might be caused by this violation.
-                if (n.pos < n.parent.pos || n.end > n.parent.end) {
-                    Debug.fail("Node of kind " + n.kind + " is not a subspan of its parent of kind " + n.parent.kind);
-                }
-
-                let argumentInfo = getImmediatelyContainingArgumentInfo(n);
-                if (argumentInfo) {
-                    return argumentInfo;
-                }
-
-
-                // TODO: Handle generic call with incomplete syntax
-            }
-            return undefined;
-        }
-
-        function getChildListThatStartsWithOpenerToken(parent: Node, openerToken: Node, sourceFile: SourceFile): Node {
-            let children = parent.getChildren(sourceFile);
-            let indexOfOpenerToken = children.indexOf(openerToken);
-            Debug.assert(indexOfOpenerToken >= 0 && children.length > indexOfOpenerToken + 1);
-            return children[indexOfOpenerToken + 1];
-        }
-
-        /**
-         * The selectedItemIndex could be negative for several reasons.
-         *     1. There are too many arguments for all of the overloads
-         *     2. None of the overloads were type compatible
-         * The solution here is to try to pick the best overload by picking
-         * either the first one that has an appropriate number of parameters,
-         * or the one with the most parameters.
-         */
-        function selectBestInvalidOverloadIndex(candidates: Signature[], argumentCount: number): number {
-            let maxParamsSignatureIndex = -1;
-            let maxParams = -1;
-            for (let i = 0; i < candidates.length; i++) {
-                let candidate = candidates[i];
-
-                if (candidate.hasRestParameter || candidate.parameters.length >= argumentCount) {
-                    return i;
-                }
-
-                if (candidate.parameters.length > maxParams) {
-                    maxParams = candidate.parameters.length;
-                    maxParamsSignatureIndex = i;
-                }
-            }
-
-            return maxParamsSignatureIndex;
-        }
-
-        function createSignatureHelpItems(candidates: Signature[], bestSignature: Signature, argumentListInfo: ArgumentListInfo): SignatureHelpItems {
-            let applicableSpan = argumentListInfo.argumentsSpan;
-            let isTypeParameterList = argumentListInfo.kind === ArgumentListKind.TypeArguments;
-
-            let invocation = argumentListInfo.invocation;
-            let callTarget = getInvokedExpression(invocation)
-            let callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
-            let callTargetDisplayParts = callTargetSymbol && symbolToDisplayParts(typeChecker, callTargetSymbol, /*enclosingDeclaration*/ undefined, /*meaning*/ undefined);
-            let items: SignatureHelpItem[] = map(candidates, candidateSignature => {
-                let signatureHelpParameters: SignatureHelpParameter[];
-                let prefixDisplayParts: SymbolDisplayPart[] = [];
-                let suffixDisplayParts: SymbolDisplayPart[] = [];
-
-                if (callTargetDisplayParts) {
-                    addRange(prefixDisplayParts, callTargetDisplayParts);
-                }
-
-                if (isTypeParameterList) {
-                    prefixDisplayParts.push(punctuationPart(SyntaxKind.LessThanToken));
-                    let typeParameters = candidateSignature.typeParameters;
-                    signatureHelpParameters = typeParameters && typeParameters.length > 0 ? map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
-                    suffixDisplayParts.push(punctuationPart(SyntaxKind.GreaterThanToken));
-                    let parameterParts = mapToDisplayParts(writer =>
-                        typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisType, candidateSignature.parameters, writer, invocation));
-                    addRange(suffixDisplayParts, parameterParts);
-                }
-                else {
-                    let typeParameterParts = mapToDisplayParts(writer =>
-                        typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation));
-                    addRange(prefixDisplayParts, typeParameterParts);
-                    prefixDisplayParts.push(punctuationPart(SyntaxKind.OpenParenToken));
-
-                    let parameters = candidateSignature.parameters;
-                    signatureHelpParameters = parameters.length > 0 ? map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
-                    suffixDisplayParts.push(punctuationPart(SyntaxKind.CloseParenToken));
-                }
-
-                let returnTypeParts = mapToDisplayParts(writer =>
-                    typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation));
-                addRange(suffixDisplayParts, returnTypeParts);
-                
-                return {
-                    isVariadic: candidateSignature.hasRestParameter,
-                    prefixDisplayParts,
-                    suffixDisplayParts,
-                    separatorDisplayParts: [punctuationPart(SyntaxKind.CommaToken), spacePart()],
-                    parameters: signatureHelpParameters,
-                    documentation: candidateSignature.getDocumentationComment()
-                };
-            });
-
-            let argumentIndex = argumentListInfo.argumentIndex;
-
-            // argumentCount is the *apparent* number of arguments.
-            let argumentCount = argumentListInfo.argumentCount;
-
-            let selectedItemIndex = candidates.indexOf(bestSignature);
-            if (selectedItemIndex < 0) {
-                selectedItemIndex = selectBestInvalidOverloadIndex(candidates, argumentCount);
-            }
-
-            Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`); 
+        function createSignatureHelpParameterForTypeParameter(typeParameter: TypeParameter): SignatureHelpParameter {
+            let displayParts = mapToDisplayParts(writer =>
+                typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(typeParameter, writer, invocation));
 
             return {
-                items,
-                applicableSpan,
-                selectedItemIndex,
-                argumentIndex,
-                argumentCount
+                name: typeParameter.symbol.name,
+                documentation: emptyArray,
+                displayParts,
+                isOptional: false
             };
-
-            function createSignatureHelpParameterForParameter(parameter: Symbol): SignatureHelpParameter {
-                let displayParts = mapToDisplayParts(writer =>
-                    typeChecker.getSymbolDisplayBuilder().buildParameterDisplay(parameter, writer, invocation));
-
-                return {
-                    name: parameter.name,
-                    documentation: parameter.getDocumentationComment(),
-                    displayParts,
-                    isOptional: typeChecker.isOptionalParameter(<ParameterDeclaration>parameter.valueDeclaration)
-                };
-            }
-
-            function createSignatureHelpParameterForTypeParameter(typeParameter: TypeParameter): SignatureHelpParameter {
-                let displayParts = mapToDisplayParts(writer =>
-                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(typeParameter, writer, invocation));
-
-                return {
-                    name: typeParameter.symbol.name,
-                    documentation: emptyArray,
-                    displayParts,
-                    isOptional: false
-                };
-            }
         }
     }
 }
\ No newline at end of file

From 060f2a85637efdc79c7af3126fc8cef25d87a241 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Mon, 2 May 2016 16:30:50 -0700
Subject: [PATCH 037/332] Add support for completion in string literals

---
 src/services/services.ts                      | 118 +++++++++++++++---
 .../fourslash/completionForStringLiteral.ts   |  15 +++
 .../fourslash/completionForStringLiteral2.ts  |  20 +++
 .../fourslash/completionForStringLiteral3.ts  |  20 +++
 4 files changed, 158 insertions(+), 15 deletions(-)
 create mode 100644 tests/cases/fourslash/completionForStringLiteral.ts
 create mode 100644 tests/cases/fourslash/completionForStringLiteral2.ts
 create mode 100644 tests/cases/fourslash/completionForStringLiteral3.ts

diff --git a/src/services/services.ts b/src/services/services.ts
index 8d28d5d958a..eeaef60afca 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1032,10 +1032,10 @@ namespace ts {
         getCancellationToken?(): HostCancellationToken;
         getCurrentDirectory(): string;
         getDefaultLibFileName(options: CompilerOptions): string;
-        log? (s: string): void;
-        trace? (s: string): void;
-        error? (s: string): void;
-        useCaseSensitiveFileNames? (): boolean;
+        log?(s: string): void;
+        trace?(s: string): void;
+        error?(s: string): void;
+        useCaseSensitiveFileNames?(): boolean;
 
         /*
          * LS host can optionally implement this method if it wants to be completely in charge of module name resolution.
@@ -2416,7 +2416,7 @@ namespace ts {
                 }
 
                 // should be start of dependency list
-                if (token !== SyntaxKind.OpenBracketToken)  {
+                if (token !== SyntaxKind.OpenBracketToken) {
                     return true;
                 }
 
@@ -3912,10 +3912,15 @@ namespace ts {
             }
         }
 
-
         function getCompletionsAtPosition(fileName: string, position: number): CompletionInfo {
             synchronizeHostData();
 
+            const sourceFile = getValidSourceFile(fileName);
+
+            if (isInString(sourceFile, position)) {
+                return getStringLiteralCompletionEntries(sourceFile, position);
+            }
+
             const completionData = getCompletionData(fileName, position);
             if (!completionData) {
                 return undefined;
@@ -3928,12 +3933,10 @@ namespace ts {
                 return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: getAllJsDocCompletionEntries() };
             }
 
-            const sourceFile = getValidSourceFile(fileName);
-
             const entries: CompletionEntry[] = [];
 
             if (isSourceFileJavaScript(sourceFile)) {
-                const uniqueNames = getCompletionEntriesFromSymbols(symbols, entries);
+                const uniqueNames = getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ false);
                 addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames));
             }
             else {
@@ -3957,7 +3960,7 @@ namespace ts {
                     }
                 }
 
-                getCompletionEntriesFromSymbols(symbols, entries);
+                getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ true);
             }
 
             // Add keywords if this is not a member completion list
@@ -4007,11 +4010,11 @@ namespace ts {
                 }));
             }
 
-            function createCompletionEntry(symbol: Symbol, location: Node): CompletionEntry {
+            function createCompletionEntry(symbol: Symbol, location: Node, performCharacterChecks: boolean): CompletionEntry {
                 // Try to get a valid display name for this symbol, if we could not find one, then ignore it.
                 // We would like to only show things that can be added after a dot, so for instance numeric properties can
                 // not be accessed with a dot (a.1 <- invalid)
-                const displayName = getCompletionEntryDisplayNameForSymbol(symbol, program.getCompilerOptions().target, /*performCharacterChecks*/ true, location);
+                const displayName = getCompletionEntryDisplayNameForSymbol(symbol, program.getCompilerOptions().target, performCharacterChecks, location);
                 if (!displayName) {
                     return undefined;
                 }
@@ -4032,12 +4035,12 @@ namespace ts {
                 };
             }
 
-            function getCompletionEntriesFromSymbols(symbols: Symbol[], entries: CompletionEntry[]): Map<string> {
+            function getCompletionEntriesFromSymbols(symbols: Symbol[], entries: CompletionEntry[], location: Node, performCharacterChecks: boolean): Map<string> {
                 const start = new Date().getTime();
                 const uniqueNames: Map<string> = {};
                 if (symbols) {
                     for (const symbol of symbols) {
-                        const entry = createCompletionEntry(symbol, location);
+                        const entry = createCompletionEntry(symbol, location, performCharacterChecks);
                         if (entry) {
                             const id = escapeIdentifier(entry.name);
                             if (!lookUp(uniqueNames, id)) {
@@ -4051,6 +4054,91 @@ namespace ts {
                 log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (new Date().getTime() - start));
                 return uniqueNames;
             }
+
+            function getStringLiteralCompletionEntries(sourceFile: SourceFile, position: number) {
+                const node = findPrecedingToken(position, sourceFile);
+                if (!node || node.kind !== SyntaxKind.StringLiteral) {
+                    return undefined;
+                }
+
+                isNameOfExternalModuleImportOrDeclaration
+                const argumentInfo = SignatureHelp.getContainingArgumentInfo(node, position, sourceFile);
+                if (argumentInfo) {
+                    return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo);
+                }
+                else if (isElementAccessExpression(node.parent) && node.parent.argumentExpression === node) {
+                    return getStringLiteralCompletionEntriesFromElementAccess(node.parent);
+                }
+                else {
+                    return getStringLiteralCompletionEntriesFromContextualType(<StringLiteral>node);
+                }
+            }
+
+            function getStringLiteralCompletionEntriesFromCallExpression(argumentInfo: SignatureHelp.ArgumentListInfo) {
+                const typeChecker = program.getTypeChecker();
+                const candidates: Signature[] = [];
+                const entries: CompletionEntry[] = [];
+
+                typeChecker.getResolvedSignature(argumentInfo.invocation, candidates);
+
+                for (const candidate of candidates) {
+                    if (candidate.parameters.length > argumentInfo.argumentIndex) {
+                        const parameter = candidate.parameters[argumentInfo.argumentIndex];
+                        addStringLiteralCompletionsFromType(typeChecker.getTypeAtLocation(parameter.valueDeclaration), entries);
+                    }
+                }
+
+                if (entries.length) {
+                    return { isMemberCompletion: false, isNewIdentifierLocation: true, entries: entries };
+                }
+
+                return undefined;
+            }
+
+            function getStringLiteralCompletionEntriesFromElementAccess(node: ElementAccessExpression) {
+                const typeChecker = program.getTypeChecker();
+                const type = typeChecker.getTypeAtLocation(node.expression);
+                const entries: CompletionEntry[] = [];
+                if (type) {
+                    getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, node, /*performCharacterChecks*/false);
+                    if (entries.length) {
+                        return { isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
+                    }
+                }
+                return undefined;
+            }
+
+            function getStringLiteralCompletionEntriesFromContextualType(node: StringLiteral) {
+                const typeChecker = program.getTypeChecker();
+                const type = typeChecker.getContextualType(node);
+                if (type) {
+                    const entries: CompletionEntry[] = [];
+                    addStringLiteralCompletionsFromType(type, entries);
+                    if (entries.length) {
+                        return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: entries };
+                    }
+                }
+                return undefined;
+            }
+
+            function addStringLiteralCompletionsFromType(type: Type, result: CompletionEntry[]): void {
+                if (!type) {
+                    return;
+                }
+                if (type.flags & TypeFlags.Union) {
+                    forEach((<UnionType>type).types, t => addStringLiteralCompletionsFromType(t, result));
+                }
+                else {
+                    if (type.flags & TypeFlags.StringLiteral) {
+                        result.push({
+                            name: (<StringLiteralType>type).text,
+                            kindModifiers: ScriptElementKindModifier.none,
+                            kind: ScriptElementKind.variableElement,
+                            sortText: "0"
+                        });
+                    }
+                }
+            }
         }
 
         function getCompletionEntryDetails(fileName: string, position: number, entryName: string): CompletionEntryDetails {
@@ -4215,7 +4303,7 @@ namespace ts {
                     // try get the call/construct signature from the type if it matches
                     let callExpression: CallExpression;
                     if (location.kind === SyntaxKind.CallExpression || location.kind === SyntaxKind.NewExpression) {
-                        callExpression = <CallExpression> location;
+                        callExpression = <CallExpression>location;
                     }
                     else if (isCallExpressionTarget(location) || isNewExpressionTarget(location)) {
                         callExpression = <CallExpression>location.parent;
diff --git a/tests/cases/fourslash/completionForStringLiteral.ts b/tests/cases/fourslash/completionForStringLiteral.ts
new file mode 100644
index 00000000000..cdbe1589f73
--- /dev/null
+++ b/tests/cases/fourslash/completionForStringLiteral.ts
@@ -0,0 +1,15 @@
+/// <reference path='fourslash.ts'/>
+
+////type Options = "Option 1" | "Option 2" | "Option 3";
+////var x: Options = "/*1*/Option 3";
+////
+////function f(a: Options) { };
+////f("/*2*/
+
+goTo.marker('1');
+verify.completionListContains("Option 1");
+verify.memberListCount(3);
+
+goTo.marker('2');
+verify.completionListContains("Option 2");
+verify.memberListCount(3);
diff --git a/tests/cases/fourslash/completionForStringLiteral2.ts b/tests/cases/fourslash/completionForStringLiteral2.ts
new file mode 100644
index 00000000000..6f0768d6c6b
--- /dev/null
+++ b/tests/cases/fourslash/completionForStringLiteral2.ts
@@ -0,0 +1,20 @@
+/// <reference path='fourslash.ts'/>
+
+////var o = {
+////    foo() { },
+////    bar: 0,
+////    "some other name": 1
+////};
+////
+////o["/*1*/bar"];
+////o["/*2*/
+
+goTo.marker('1');
+verify.completionListContains("foo");
+verify.completionListAllowsNewIdentifier();
+verify.memberListCount(3);
+
+goTo.marker('2');
+verify.completionListContains("some other name");
+verify.completionListAllowsNewIdentifier();
+verify.memberListCount(3);
diff --git a/tests/cases/fourslash/completionForStringLiteral3.ts b/tests/cases/fourslash/completionForStringLiteral3.ts
new file mode 100644
index 00000000000..8c1a7cab2ed
--- /dev/null
+++ b/tests/cases/fourslash/completionForStringLiteral3.ts
@@ -0,0 +1,20 @@
+/// <reference path='fourslash.ts'/>
+
+////declare function f(a: "A", b: number): void;
+////declare function f(a: "B", b: number): void;
+////declare function f(a: "C", b: number): void;
+////declare function f(a: string, b: number): void;
+////
+////f("/*1*/C", 2);
+////
+////f("/*2*/
+
+goTo.marker('1');
+verify.completionListContains("A");
+verify.completionListAllowsNewIdentifier();
+verify.memberListCount(3);
+
+goTo.marker('2');
+verify.completionListContains("A");
+verify.completionListAllowsNewIdentifier();
+verify.memberListCount(3);

From 7b0d664394c3a3742e6c52d9fec65e3f3e445267 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Mon, 2 May 2016 16:44:11 -0700
Subject: [PATCH 038/332] Remove unused check

---
 src/services/services.ts | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/services/services.ts b/src/services/services.ts
index eeaef60afca..967e9949d49 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -4061,7 +4061,6 @@ namespace ts {
                     return undefined;
                 }
 
-                isNameOfExternalModuleImportOrDeclaration
                 const argumentInfo = SignatureHelp.getContainingArgumentInfo(node, position, sourceFile);
                 if (argumentInfo) {
                     return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo);

From 291ad3360751ee0669912fe5d55ba2f3461fd7c7 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Tue, 3 May 2016 12:30:27 -0700
Subject: [PATCH 039/332] Use const instead of let

---
 src/services/signatureHelp.ts | 130 +++++++++++++++++-----------------
 src/services/utilities.ts     |  10 +--
 2 files changed, 70 insertions(+), 70 deletions(-)

diff --git a/src/services/signatureHelp.ts b/src/services/signatureHelp.ts
index fa7cc42e0d1..b6c328dcea5 100644
--- a/src/services/signatureHelp.ts
+++ b/src/services/signatureHelp.ts
@@ -162,7 +162,7 @@ namespace ts.SignatureHelp {
     //    // Did not find matching token
     //    return null;
     //}
-    let emptyArray: any[] = [];
+    const emptyArray: any[] = [];
 
     const enum ArgumentListKind {
         TypeArguments,
@@ -179,16 +179,16 @@ namespace ts.SignatureHelp {
     }
 
     export function getSignatureHelpItems(program: Program, sourceFile: SourceFile, position: number, cancellationToken: CancellationToken): SignatureHelpItems {
-        let typeChecker = program.getTypeChecker();
+        const typeChecker = program.getTypeChecker();
 
         // Decide whether to show signature help
-        let startingToken = findTokenOnLeftOfPosition(sourceFile, position);
+        const startingToken = findTokenOnLeftOfPosition(sourceFile, position);
         if (!startingToken) {
             // We are at the beginning of the file
             return undefined;
         }
 
-        let argumentInfo = getContainingArgumentInfo(startingToken, position, sourceFile);
+        const argumentInfo = getContainingArgumentInfo(startingToken, position, sourceFile);
         cancellationToken.throwIfCancellationRequested();
 
         // Semantic filtering of signature help
@@ -196,9 +196,9 @@ namespace ts.SignatureHelp {
             return undefined;
         }
 
-        let call = argumentInfo.invocation;
-        let candidates = <Signature[]>[];
-        let resolvedSignature = typeChecker.getResolvedSignature(call, candidates);
+        const call = argumentInfo.invocation;
+        const candidates = <Signature[]>[];
+        const resolvedSignature = typeChecker.getResolvedSignature(call, candidates);
         cancellationToken.throwIfCancellationRequested();
 
         if (!candidates.length) {
@@ -220,9 +220,9 @@ namespace ts.SignatureHelp {
         }
 
         // See if we can find some symbol with the call expression name that has call signatures.
-        let callExpression = <CallExpression>argumentInfo.invocation;
-        let expression = callExpression.expression;
-        let name = expression.kind === SyntaxKind.Identifier
+        const callExpression = <CallExpression>argumentInfo.invocation;
+        const expression = callExpression.expression;
+        const name = expression.kind === SyntaxKind.Identifier
             ? <Identifier>expression
             : expression.kind === SyntaxKind.PropertyAccessExpression
                 ? (<PropertyAccessExpression>expression).name
@@ -232,18 +232,18 @@ namespace ts.SignatureHelp {
             return undefined;
         }
 
-        let typeChecker = program.getTypeChecker();
-        for (let sourceFile of program.getSourceFiles()) {
-            let nameToDeclarations = sourceFile.getNamedDeclarations();
-            let declarations = getProperty(nameToDeclarations, name.text);
+        const typeChecker = program.getTypeChecker();
+        for (const sourceFile of program.getSourceFiles()) {
+            const nameToDeclarations = sourceFile.getNamedDeclarations();
+            const declarations = getProperty(nameToDeclarations, name.text);
 
             if (declarations) {
-                for (let declaration of declarations) {
-                    let symbol = declaration.symbol;
+                for (const declaration of declarations) {
+                    const symbol = declaration.symbol;
                     if (symbol) {
-                        let type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
+                        const type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
                         if (type) {
-                            let callSignatures = type.getCallSignatures();
+                            const callSignatures = type.getCallSignatures();
                             if (callSignatures && callSignatures.length) {
                                 return createSignatureHelpItems(callSignatures, callSignatures[0], argumentInfo, typeChecker);
                             }
@@ -260,7 +260,7 @@ namespace ts.SignatureHelp {
      */
     function getImmediatelyContainingArgumentInfo(node: Node, position: number, sourceFile: SourceFile): ArgumentListInfo {
         if (node.parent.kind === SyntaxKind.CallExpression || node.parent.kind === SyntaxKind.NewExpression) {
-            let callExpression = <CallExpression>node.parent;
+            const callExpression = <CallExpression>node.parent;
             // There are 3 cases to handle:
             //   1. The token introduces a list, and should begin a sig help session
             //   2. The token is either not associated with a list, or ends a list, so the session should end
@@ -279,8 +279,8 @@ namespace ts.SignatureHelp {
                 node.kind === SyntaxKind.OpenParenToken) {
                 // Find the list that starts right *after* the < or ( token.
                 // If the user has just opened a list, consider this item 0.
-                let list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
-                let isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
+                const list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
+                const isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
                 Debug.assert(list !== undefined);
                 return {
                     kind: isTypeArgList ? ArgumentListKind.TypeArguments : ArgumentListKind.CallArguments,
@@ -297,13 +297,13 @@ namespace ts.SignatureHelp {
             //   - Between the type arguments and the arguments (greater than token)
             //   - On the target of the call (parent.func)
             //   - On the 'new' keyword in a 'new' expression
-            let listItemInfo = findListItemInfo(node);
+            const listItemInfo = findListItemInfo(node);
             if (listItemInfo) {
-                let list = listItemInfo.list;
-                let isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
+                const list = listItemInfo.list;
+                const isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
 
-                let argumentIndex = getArgumentIndex(list, node);
-                let argumentCount = getArgumentCount(list);
+                const argumentIndex = getArgumentIndex(list, node);
+                const argumentCount = getArgumentCount(list);
 
                 Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount,
                     `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`);
@@ -325,18 +325,18 @@ namespace ts.SignatureHelp {
             }
         }
         else if (node.kind === SyntaxKind.TemplateHead && node.parent.parent.kind === SyntaxKind.TaggedTemplateExpression) {
-            let templateExpression = <TemplateExpression>node.parent;
-            let tagExpression = <TaggedTemplateExpression>templateExpression.parent;
+            const templateExpression = <TemplateExpression>node.parent;
+            const tagExpression = <TaggedTemplateExpression>templateExpression.parent;
             Debug.assert(templateExpression.kind === SyntaxKind.TemplateExpression);
 
-            let argumentIndex = isInsideTemplateLiteral(<LiteralExpression>node, position) ? 0 : 1;
+            const argumentIndex = isInsideTemplateLiteral(<LiteralExpression>node, position) ? 0 : 1;
 
             return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
         }
         else if (node.parent.kind === SyntaxKind.TemplateSpan && node.parent.parent.parent.kind === SyntaxKind.TaggedTemplateExpression) {
-            let templateSpan = <TemplateSpan>node.parent;
-            let templateExpression = <TemplateExpression>templateSpan.parent;
-            let tagExpression = <TaggedTemplateExpression>templateExpression.parent;
+            const templateSpan = <TemplateSpan>node.parent;
+            const templateExpression = <TemplateExpression>templateSpan.parent;
+            const tagExpression = <TaggedTemplateExpression>templateExpression.parent;
             Debug.assert(templateExpression.kind === SyntaxKind.TemplateExpression);
 
             // If we're just after a template tail, don't show signature help.
@@ -344,8 +344,8 @@ namespace ts.SignatureHelp {
                 return undefined;
             }
 
-            let spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
-            let argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node, position);
+            const spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
+            const argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node, position);
 
             return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
         }
@@ -366,8 +366,8 @@ namespace ts.SignatureHelp {
         // that trailing comma in the list, and we'll have generated the appropriate
         // arg index.
         let argumentIndex = 0;
-        let listChildren = argumentsList.getChildren();
-        for (let child of listChildren) {
+        const listChildren = argumentsList.getChildren();
+        for (const child of listChildren) {
             if (child === node) {
                 break;
             }
@@ -391,7 +391,7 @@ namespace ts.SignatureHelp {
         // we'll have:  'a' '<comma>' '<missing>' 
         // That will give us 2 non-commas.  We then add one for the last comma, givin us an
         // arg count of 3.
-        let listChildren = argumentsList.getChildren();
+        const listChildren = argumentsList.getChildren();
 
         let argumentCount = countWhere(listChildren, arg => arg.kind !== SyntaxKind.CommaToken);
         if (listChildren.length > 0 && lastOrUndefined(listChildren).kind === SyntaxKind.CommaToken) {
@@ -427,7 +427,7 @@ namespace ts.SignatureHelp {
 
     function getArgumentListInfoForTemplate(tagExpression: TaggedTemplateExpression, argumentIndex: number, sourceFile: SourceFile): ArgumentListInfo {
         // argumentCount is either 1 or (numSpans + 1) to account for the template strings array argument.
-        let argumentCount = tagExpression.template.kind === SyntaxKind.NoSubstitutionTemplateLiteral
+        const argumentCount = tagExpression.template.kind === SyntaxKind.NoSubstitutionTemplateLiteral
             ? 1
             : (<TemplateExpression>tagExpression.template).templateSpans.length + 1;
 
@@ -451,14 +451,14 @@ namespace ts.SignatureHelp {
         //
         // The applicable span is from the first bar to the second bar (inclusive,
         // but not including parentheses)
-        let applicableSpanStart = argumentsList.getFullStart();
-        let applicableSpanEnd = skipTrivia(sourceFile.text, argumentsList.getEnd(), /*stopAfterLineBreak*/ false);
+        const applicableSpanStart = argumentsList.getFullStart();
+        const applicableSpanEnd = skipTrivia(sourceFile.text, argumentsList.getEnd(), /*stopAfterLineBreak*/ false);
         return createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
     }
 
     function getApplicableSpanForTaggedTemplate(taggedTemplate: TaggedTemplateExpression, sourceFile: SourceFile): TextSpan {
-        let template = taggedTemplate.template;
-        let applicableSpanStart = template.getStart();
+        const template = taggedTemplate.template;
+        const applicableSpanStart = template.getStart();
         let applicableSpanEnd = template.getEnd();
 
         // We need to adjust the end position for the case where the template does not have a tail.
@@ -471,7 +471,7 @@ namespace ts.SignatureHelp {
         // This is because a Missing node has no width. However, what we actually want is to include trivia
         // leading up to the next token in case the user is about to type in a TemplateMiddle or TemplateTail.
         if (template.kind === SyntaxKind.TemplateExpression) {
-            let lastSpan = lastOrUndefined((<TemplateExpression>template).templateSpans);
+            const lastSpan = lastOrUndefined((<TemplateExpression>template).templateSpans);
             if (lastSpan.literal.getFullWidth() === 0) {
                 applicableSpanEnd = skipTrivia(sourceFile.text, applicableSpanEnd, /*stopAfterLineBreak*/ false);
             }
@@ -492,7 +492,7 @@ namespace ts.SignatureHelp {
                 Debug.fail("Node of kind " + n.kind + " is not a subspan of its parent of kind " + n.parent.kind);
             }
 
-            let argumentInfo = getImmediatelyContainingArgumentInfo(n, position, sourceFile);
+            const argumentInfo = getImmediatelyContainingArgumentInfo(n, position, sourceFile);
             if (argumentInfo) {
                 return argumentInfo;
             }
@@ -504,8 +504,8 @@ namespace ts.SignatureHelp {
     }
 
     function getChildListThatStartsWithOpenerToken(parent: Node, openerToken: Node, sourceFile: SourceFile): Node {
-        let children = parent.getChildren(sourceFile);
-        let indexOfOpenerToken = children.indexOf(openerToken);
+        const children = parent.getChildren(sourceFile);
+        const indexOfOpenerToken = children.indexOf(openerToken);
         Debug.assert(indexOfOpenerToken >= 0 && children.length > indexOfOpenerToken + 1);
         return children[indexOfOpenerToken + 1];
     }
@@ -522,7 +522,7 @@ namespace ts.SignatureHelp {
         let maxParamsSignatureIndex = -1;
         let maxParams = -1;
         for (let i = 0; i < candidates.length; i++) {
-            let candidate = candidates[i];
+            const candidate = candidates[i];
 
             if (candidate.hasRestParameter || candidate.parameters.length >= argumentCount) {
                 return i;
@@ -538,17 +538,17 @@ namespace ts.SignatureHelp {
     }
 
     function createSignatureHelpItems(candidates: Signature[], bestSignature: Signature, argumentListInfo: ArgumentListInfo, typeChecker: TypeChecker): SignatureHelpItems {
-        let applicableSpan = argumentListInfo.argumentsSpan;
-        let isTypeParameterList = argumentListInfo.kind === ArgumentListKind.TypeArguments;
+        const applicableSpan = argumentListInfo.argumentsSpan;
+        const isTypeParameterList = argumentListInfo.kind === ArgumentListKind.TypeArguments;
 
-        let invocation = argumentListInfo.invocation;
-        let callTarget = getInvokedExpression(invocation)
-        let callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
-        let callTargetDisplayParts = callTargetSymbol && symbolToDisplayParts(typeChecker, callTargetSymbol, /*enclosingDeclaration*/ undefined, /*meaning*/ undefined);
-        let items: SignatureHelpItem[] = map(candidates, candidateSignature => {
+        const invocation = argumentListInfo.invocation;
+        const callTarget = getInvokedExpression(invocation)
+        const callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
+        const callTargetDisplayParts = callTargetSymbol && symbolToDisplayParts(typeChecker, callTargetSymbol, /*enclosingDeclaration*/ undefined, /*meaning*/ undefined);
+        const items: SignatureHelpItem[] = map(candidates, candidateSignature => {
             let signatureHelpParameters: SignatureHelpParameter[];
-            let prefixDisplayParts: SymbolDisplayPart[] = [];
-            let suffixDisplayParts: SymbolDisplayPart[] = [];
+            const prefixDisplayParts: SymbolDisplayPart[] = [];
+            const suffixDisplayParts: SymbolDisplayPart[] = [];
 
             if (callTargetDisplayParts) {
                 addRange(prefixDisplayParts, callTargetDisplayParts);
@@ -556,25 +556,25 @@ namespace ts.SignatureHelp {
 
             if (isTypeParameterList) {
                 prefixDisplayParts.push(punctuationPart(SyntaxKind.LessThanToken));
-                let typeParameters = candidateSignature.typeParameters;
+                const typeParameters = candidateSignature.typeParameters;
                 signatureHelpParameters = typeParameters && typeParameters.length > 0 ? map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
                 suffixDisplayParts.push(punctuationPart(SyntaxKind.GreaterThanToken));
-                let parameterParts = mapToDisplayParts(writer =>
+                const parameterParts = mapToDisplayParts(writer =>
                     typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisType, candidateSignature.parameters, writer, invocation));
                 addRange(suffixDisplayParts, parameterParts);
             }
             else {
-                let typeParameterParts = mapToDisplayParts(writer =>
+                const typeParameterParts = mapToDisplayParts(writer =>
                     typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation));
                 addRange(prefixDisplayParts, typeParameterParts);
                 prefixDisplayParts.push(punctuationPart(SyntaxKind.OpenParenToken));
 
-                let parameters = candidateSignature.parameters;
+                const parameters = candidateSignature.parameters;
                 signatureHelpParameters = parameters.length > 0 ? map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
                 suffixDisplayParts.push(punctuationPart(SyntaxKind.CloseParenToken));
             }
 
-            let returnTypeParts = mapToDisplayParts(writer =>
+            const returnTypeParts = mapToDisplayParts(writer =>
                 typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation));
             addRange(suffixDisplayParts, returnTypeParts);
 
@@ -588,10 +588,10 @@ namespace ts.SignatureHelp {
             };
         });
 
-        let argumentIndex = argumentListInfo.argumentIndex;
+        const argumentIndex = argumentListInfo.argumentIndex;
 
         // argumentCount is the *apparent* number of arguments.
-        let argumentCount = argumentListInfo.argumentCount;
+        const argumentCount = argumentListInfo.argumentCount;
 
         let selectedItemIndex = candidates.indexOf(bestSignature);
         if (selectedItemIndex < 0) {
@@ -609,7 +609,7 @@ namespace ts.SignatureHelp {
         };
 
         function createSignatureHelpParameterForParameter(parameter: Symbol): SignatureHelpParameter {
-            let displayParts = mapToDisplayParts(writer =>
+            const displayParts = mapToDisplayParts(writer =>
                 typeChecker.getSymbolDisplayBuilder().buildParameterDisplay(parameter, writer, invocation));
 
             return {
@@ -621,7 +621,7 @@ namespace ts.SignatureHelp {
         }
 
         function createSignatureHelpParameterForTypeParameter(typeParameter: TypeParameter): SignatureHelpParameter {
-            let displayParts = mapToDisplayParts(writer =>
+            const displayParts = mapToDisplayParts(writer =>
                 typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(typeParameter, writer, invocation));
 
             return {
diff --git a/src/services/utilities.ts b/src/services/utilities.ts
index a625a2d6476..4f9632afde5 100644
--- a/src/services/utilities.ts
+++ b/src/services/utilities.ts
@@ -508,8 +508,8 @@ namespace ts {
         return forEach(commentRanges, jsDocPrefix);
 
         function jsDocPrefix(c: CommentRange): boolean {
-            var text = sourceFile.text;
-            return text.length >= c.pos + 3 && text[c.pos] === '/' && text[c.pos + 1] === '*' && text[c.pos + 2] === '*';
+            const text = sourceFile.text;
+            return text.length >= c.pos + 3 && text[c.pos] === "/" && text[c.pos + 1] === "*" && text[c.pos + 2] === "*";
         }
     }
 
@@ -564,7 +564,7 @@ namespace ts {
         if (flags & NodeFlags.Export) result.push(ScriptElementKindModifier.exportedModifier);
         if (isInAmbientContext(node)) result.push(ScriptElementKindModifier.ambientModifier);
 
-        return result.length > 0 ? result.join(',') : ScriptElementKindModifier.none;
+        return result.length > 0 ? result.join(",") : ScriptElementKindModifier.none;
     }
 
     export function getTypeArgumentOrTypeParameterList(node: Node): NodeArray<Node> {
@@ -647,7 +647,7 @@ namespace ts {
             // [a,b,c] from:
             // [a, b, c] = someExpression;
             if (node.parent.kind === SyntaxKind.BinaryExpression &&
-                (<BinaryExpression>node.parent).left === node && 
+                (<BinaryExpression>node.parent).left === node &&
                 (<BinaryExpression>node.parent).operatorToken.kind === SyntaxKind.EqualsToken) {
                 return true;
             }
@@ -786,7 +786,7 @@ namespace ts {
     }
 
     export function textOrKeywordPart(text: string) {
-        var kind = stringToToken(text);
+        const kind = stringToToken(text);
         return kind === undefined
             ? textPart(text)
             : keywordPart(kind);

From e5a32b71aa537e2c5b241b5b0e6f60895ea1cea6 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Tue, 3 May 2016 12:30:53 -0700
Subject: [PATCH 040/332] Fix error

---
 tests/cases/fourslash/fourslash.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/tests/cases/fourslash/fourslash.ts b/tests/cases/fourslash/fourslash.ts
index 48d69f0a85e..c0df85f0f7b 100644
--- a/tests/cases/fourslash/fourslash.ts
+++ b/tests/cases/fourslash/fourslash.ts
@@ -52,13 +52,13 @@ declare module ts {
         None = 0,
         Block = 1,
         Smart = 2,
-    }  
+    }
 
     interface OutputFile {
         name: string;
         writeByteOrderMark: boolean;
         text: string;
-    }  
+    }
 }
 
 declare namespace FourSlashInterface {
@@ -139,7 +139,7 @@ declare namespace FourSlashInterface {
         isValidBraceCompletionAtPostion(openingBrace?: string): void;
     }
     class verify extends verifyNegatable {
-        assertHasRanges(ranges: FourSlash.Range[]): void;
+        assertHasRanges(ranges: Range[]): void;
         caretAtMarker(markerName?: string): void;
         indentationIs(numberOfSpaces: number): void;
         indentationAtPositionIs(fileName: string, position: number, numberOfSpaces: number, indentStyle?: ts.IndentStyle): void;

From 02f30ff04c5559da41de9d3a28f3c8fb8a3c00b6 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Tue, 3 May 2016 12:31:12 -0700
Subject: [PATCH 041/332] Formatting changes

---
 src/services/breakpoints.ts | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/src/services/breakpoints.ts b/src/services/breakpoints.ts
index c79a34b1bfa..bc3530b7822 100644
--- a/src/services/breakpoints.ts
+++ b/src/services/breakpoints.ts
@@ -259,13 +259,13 @@ namespace ts.BreakpointResolver {
                         if (isArrayLiteralOrObjectLiteralDestructuringPattern(node)) {
                             return spanInArrayLiteralOrObjectLiteralDestructuringPattern(<DestructuringPattern>node);
                         }
-                        
+
                         // Set breakpoint on identifier element of destructuring pattern
                         // a or ...c  or d: x from 
                         // [a, b, ...c] or { a, b } or { d: x } from destructuring pattern
                         if ((node.kind === SyntaxKind.Identifier ||
-                            node.kind == SyntaxKind.SpreadElementExpression || 
-                            node.kind === SyntaxKind.PropertyAssignment || 
+                            node.kind == SyntaxKind.SpreadElementExpression ||
+                            node.kind === SyntaxKind.PropertyAssignment ||
                             node.kind === SyntaxKind.ShorthandPropertyAssignment) &&
                             isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
                             return textSpan(node);
@@ -325,14 +325,14 @@ namespace ts.BreakpointResolver {
                                     break;
                             }
                         }
-                        
+
                         // If this is name of property assignment, set breakpoint in the initializer
                         if (node.parent.kind === SyntaxKind.PropertyAssignment &&
-                            (<PropertyDeclaration>node.parent).name === node && 
+                            (<PropertyDeclaration>node.parent).name === node &&
                             !isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.parent)) {
                             return spanInNode((<PropertyDeclaration>node.parent).initializer);
                         }
-                        
+
                         // Breakpoint in type assertion goes to its operand
                         if (node.parent.kind === SyntaxKind.TypeAssertionExpression && (<TypeAssertion>node.parent).type === node) {
                             return spanInNextNode((<TypeAssertion>node.parent).type);
@@ -386,7 +386,7 @@ namespace ts.BreakpointResolver {
                 if (variableDeclaration.parent.parent.kind === SyntaxKind.ForInStatement) {
                     return spanInNode(variableDeclaration.parent.parent);
                 }
-                
+
                 // If this is a destructuring pattern set breakpoint in binding pattern
                 if (isBindingPattern(variableDeclaration.name)) {
                     return spanInBindingPattern(<BindingPattern>variableDeclaration.name);
@@ -686,7 +686,7 @@ namespace ts.BreakpointResolver {
             function spanInColonToken(node: Node): TextSpan {
                 // Is this : specifying return annotation of the function declaration
                 if (isFunctionLike(node.parent) ||
-                    node.parent.kind === SyntaxKind.PropertyAssignment || 
+                    node.parent.kind === SyntaxKind.PropertyAssignment ||
                     node.parent.kind === SyntaxKind.Parameter) {
                     return spanInPreviousNode(node);
                 }
@@ -722,5 +722,5 @@ namespace ts.BreakpointResolver {
                 return spanInNode(node.parent);
             }
         }
-   }
+    }
 }
\ No newline at end of file

From b9ab4d3e08115516bd099c54aa04c81ca4f59a57 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Tue, 3 May 2016 12:34:47 -0700
Subject: [PATCH 042/332] Use shorthand properties

---
 src/services/services.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/services/services.ts b/src/services/services.ts
index 967e9949d49..d2a9a3988e6 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -4088,7 +4088,7 @@ namespace ts {
                 }
 
                 if (entries.length) {
-                    return { isMemberCompletion: false, isNewIdentifierLocation: true, entries: entries };
+                    return { isMemberCompletion: false, isNewIdentifierLocation: true, entries };
                 }
 
                 return undefined;
@@ -4101,7 +4101,7 @@ namespace ts {
                 if (type) {
                     getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, node, /*performCharacterChecks*/false);
                     if (entries.length) {
-                        return { isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
+                        return { isMemberCompletion: true, isNewIdentifierLocation: true, entries };
                     }
                 }
                 return undefined;
@@ -4114,7 +4114,7 @@ namespace ts {
                     const entries: CompletionEntry[] = [];
                     addStringLiteralCompletionsFromType(type, entries);
                     if (entries.length) {
-                        return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: entries };
+                        return { isMemberCompletion: false, isNewIdentifierLocation: false, entries };
                     }
                 }
                 return undefined;

From f4e10eb738bcf5e157cf18047c8d930c4d39384b Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Tue, 17 May 2016 15:41:31 -0700
Subject: [PATCH 043/332] Automatically consume /types

---
 src/compiler/program.ts | 54 ++++++++++++++++++++++++++---------------
 src/compiler/sys.ts     | 14 +++++++++++
 src/compiler/types.ts   |  2 ++
 3 files changed, 50 insertions(+), 20 deletions(-)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 52547cb165d..c8761555d12 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -18,6 +18,8 @@ namespace ts {
         "node_modules/@types/",
     ];
 
+    const autoImportedTypePaths = ["types", "node_modules/@types"];
+
     export const version = "1.9.0";
 
     export function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean): string {
@@ -196,8 +198,8 @@ namespace ts {
             traceEnabled
         };
 
-        // use typesRoot and fallback to directory that contains tsconfig if typesRoot is not set
-        const rootDir = options.typesRoot || (options.configFilePath ? getDirectoryPath(options.configFilePath) : undefined);
+        // use typesRoot and fallback to directory that contains tsconfig or current directory if typesRoot is not set
+        const rootDir = options.typesRoot || (options.configFilePath ? getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
 
         if (traceEnabled) {
             if (containingFile === undefined) {
@@ -875,6 +877,19 @@ namespace ts {
             }
         }
 
+        function getDefaultTypeDirectiveNames(rootPath: string): string[] {
+            const localTypes = combinePaths(rootPath, 'types');
+            const npmTypes = combinePaths(rootPath, 'node_modules/@types');
+            let result: string[] = [];
+            if (sys.directoryExists(localTypes)) {
+                result = result.concat(sys.getDirectories(localTypes));
+            }
+            if (sys.directoryExists(npmTypes)) {
+                result = result.concat(sys.getDirectories(npmTypes));
+            }
+            return result;
+        }
+
         function getDefaultLibLocation(): string {
             return getDirectoryPath(normalizePath(sys.getExecutingFilePath()));
         }
@@ -883,6 +898,7 @@ namespace ts {
         const realpath = sys.realpath && ((path: string) => sys.realpath(path));
 
         return {
+            getDefaultTypeDirectiveNames,
             getSourceFile,
             getDefaultLibLocation,
             getDefaultLibFileName: options => combinePaths(getDefaultLibLocation(), getDefaultLibFileName(options)),
@@ -1006,10 +1022,21 @@ namespace ts {
 
         if (!tryReuseStructureFromOldProgram()) {
             // load type declarations specified via 'types' argument
-            if (options.types && options.types.length) {
-                const resolutions = resolveTypeReferenceDirectiveNamesWorker(options.types, /*containingFile*/ undefined);
-                for (let i = 0; i < options.types.length; i++) {
-                    processTypeReferenceDirective(options.types[i], resolutions[i]);
+            let typeReferences: string[];
+            if (options.types) {
+                typeReferences = options.types;
+            }
+            else {
+                // or load all types from the automatic type import fields
+                if (host.getDefaultTypeDirectiveNames) {
+                    typeReferences = host.getDefaultTypeDirectiveNames(getCommonSourceDirectory());;
+                }
+            }
+
+            if (typeReferences) {
+                const resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, /*containingFile*/ undefined);
+                for (let i = 0; i < typeReferences.length; i++) {
+                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
                 }
             }
 
@@ -1914,20 +1941,7 @@ namespace ts {
                         i < file.imports.length;
 
                     if (shouldAddFile) {
-                        const importedFile = findSourceFile(resolution.resolvedFileName, toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), /*isDefaultLib*/ false, /*isReference*/ false, file, skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
-
-                        if (importedFile && resolution.isExternalLibraryImport) {
-                            // Since currently irrespective of allowJs, we only look for supportedTypeScript extension external module files,
-                            // this check is ok. Otherwise this would be never true for javascript file
-                            if (!isExternalModule(importedFile) && importedFile.statements.length) {
-                                const start = getTokenPosOfNode(file.imports[i], file);
-                                fileProcessingDiagnostics.add(createFileDiagnostic(file, start, file.imports[i].end - start, Diagnostics.Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition, importedFile.fileName));
-                            }
-                            else if (importedFile.referencedFiles.length) {
-                                const firstRef = importedFile.referencedFiles[0];
-                                fileProcessingDiagnostics.add(createFileDiagnostic(importedFile, firstRef.pos, firstRef.end - firstRef.pos, Diagnostics.Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition));
-                            }
-                        }
+                        findSourceFile(resolution.resolvedFileName, toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), /*isDefaultLib*/ false, /*isReference*/ false, file, skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
                     }
                 }
             }
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index a9a39f42240..6669a6fca24 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -24,6 +24,7 @@ namespace ts {
         createDirectory(path: string): void;
         getExecutingFilePath(): string;
         getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
         readDirectory(path: string, extension?: string, exclude?: string[]): string[];
         getModifiedTime?(path: string): Date;
         createHash?(data: string): string;
@@ -71,6 +72,7 @@ namespace ts {
         resolvePath(path: string): string;
         readFile(path: string): string;
         writeFile(path: string, contents: string): void;
+        getDirectories(path: string): string[];
         readDirectory(path: string, extension?: string, exclude?: string[]): string[];
         watchFile?(path: string, callback: FileWatcherCallback): FileWatcher;
         watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
@@ -161,6 +163,11 @@ namespace ts {
                 return result.sort();
             }
 
+            function getDirectories(path: string): string[] {
+                const folder = fso.GetFolder(path);
+                return getNames(folder.subfolders);
+            }
+
             function readDirectory(path: string, extension?: string, exclude?: string[]): string[] {
                 const result: string[] = [];
                 exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
@@ -214,6 +221,7 @@ namespace ts {
                 getCurrentDirectory() {
                     return new ActiveXObject("WScript.Shell").CurrentDirectory;
                 },
+                getDirectories,
                 readDirectory,
                 exit(exitCode?: number): void {
                     try {
@@ -402,6 +410,10 @@ namespace ts {
                 return fileSystemEntryExists(path, FileSystemEntryKind.Directory);
             }
 
+            function getDirectories(path: string): string[] {
+                return _fs.readdirSync(path);
+            }
+
             function readDirectory(path: string, extension?: string, exclude?: string[]): string[] {
                 const result: string[] = [];
                 exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
@@ -507,6 +519,7 @@ namespace ts {
                 getCurrentDirectory() {
                     return process.cwd();
                 },
+                getDirectories,
                 readDirectory,
                 getModifiedTime(path) {
                     try {
@@ -561,6 +574,7 @@ namespace ts {
                 createDirectory: ChakraHost.createDirectory,
                 getExecutingFilePath: () => ChakraHost.executingFile,
                 getCurrentDirectory: () => ChakraHost.currentDirectory,
+                getDirectories: ChakraHost.getDirectories,
                 readDirectory: ChakraHost.readDirectory,
                 exit: ChakraHost.quit,
                 realpath
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 777141b45fb..877a1a330fe 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2784,6 +2784,7 @@ namespace ts {
         trace?(s: string): void;
         directoryExists?(directoryName: string): boolean;
         realpath?(path: string): string;
+        getCurrentDirectory?(): string;
     }
 
     export interface ResolvedModule {
@@ -2820,6 +2821,7 @@ namespace ts {
         getCancellationToken?(): CancellationToken;
         getDefaultLibFileName(options: CompilerOptions): string;
         getDefaultLibLocation?(): string;
+        getDefaultTypeDirectiveNames?(rootPath: string): string[];
         writeFile: WriteFileCallback;
         getCurrentDirectory(): string;
         getCanonicalFileName(fileName: string): string;

From 917ab0aa0afa7501ff0dc75f3ee191718e03eaac Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Wed, 18 May 2016 10:43:44 -0700
Subject: [PATCH 044/332] Update test harness

---
 src/harness/harness.ts                        | 38 +++++++++++++------
 src/harness/harnessLanguageService.ts         |  4 ++
 .../conformance/typings/typingsLookup1.ts     | 10 +++++
 .../cases/unittests/cachingInServerLSHost.ts  |  1 +
 tests/cases/unittests/session.ts              |  1 +
 5 files changed, 42 insertions(+), 12 deletions(-)
 create mode 100644 tests/cases/conformance/typings/typingsLookup1.ts

diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index ef9b36b50e2..ca8102b2ff4 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -127,7 +127,7 @@ namespace Utils {
     export function memoize<T extends Function>(f: T): T {
         const cache: { [idx: string]: any } = {};
 
-        return <any>(function () {
+        return <any>(function() {
             const key = Array.prototype.join.call(arguments);
             const cachedResult = cache[key];
             if (cachedResult) {
@@ -609,7 +609,7 @@ namespace Harness {
             export const getCurrentDirectory = () => "";
             export const args = () => <string[]>[];
             export const getExecutingFilePath = () => "";
-            export const exit = (exitCode: number) => {};
+            export const exit = (exitCode: number) => { };
 
             export let log = (s: string) => console.log(s);
 
@@ -826,7 +826,7 @@ namespace Harness {
             }
 
             if (!libFileNameSourceFileMap[fileName]) {
-                libFileNameSourceFileMap[fileName] = createSourceFileAndAssertInvariants(fileName,  IO.readFile(libFolder + fileName), ts.ScriptTarget.Latest);
+                libFileNameSourceFileMap[fileName] = createSourceFileAndAssertInvariants(fileName, IO.readFile(libFolder + fileName), ts.ScriptTarget.Latest);
             }
             return libFileNameSourceFileMap[fileName];
         }
@@ -900,6 +900,20 @@ namespace Harness {
 
 
             return {
+                getDefaultTypeDirectiveNames: (path: string) => {
+                    const results: string[] = [];
+                    fileMap.forEachValue((key, value) => {
+                        const rx = /node_modules\/@types\/(\w+)/;
+                        const typeNameResult = rx.exec(key);
+                        if(typeNameResult) {
+                            const typeName = typeNameResult[1];
+                            if (results.indexOf(typeName) < 0) {
+                                results.push(typeName);
+                            }
+                        }
+                    });
+                    return results;
+                },
                 getCurrentDirectory: () => currentDirectory,
                 getSourceFile,
                 getDefaultLibFileName,
@@ -1441,12 +1455,12 @@ namespace Harness {
                     if (currentFileName) {
                         // Store result file
                         const newTestFile = {
-                                content: currentFileContent,
-                                name: currentFileName,
-                                fileOptions: currentFileOptions,
-                                originalFilePath: fileName,
-                                references: refs
-                            };
+                            content: currentFileContent,
+                            name: currentFileName,
+                            fileOptions: currentFileOptions,
+                            originalFilePath: fileName,
+                            references: refs
+                        };
                         testUnitData.push(newTestFile);
 
                         // Reset local data
@@ -1544,10 +1558,10 @@ namespace Harness {
 
         function baselinePath(fileName: string, type: string, baselineFolder: string, subfolder?: string) {
             if (subfolder !== undefined) {
-                return Harness.userSpecifiedRoot + baselineFolder + "/" +  subfolder + "/" + type + "/" + fileName;
+                return Harness.userSpecifiedRoot + baselineFolder + "/" + subfolder + "/" + type + "/" + fileName;
             }
             else {
-                return Harness.userSpecifiedRoot + baselineFolder + "/"  + type + "/" + fileName;
+                return Harness.userSpecifiedRoot + baselineFolder + "/" + type + "/" + fileName;
             }
         }
 
@@ -1616,7 +1630,7 @@ namespace Harness {
         }
 
         function writeComparison(expected: string, actual: string, relativeFileName: string, actualFileName: string, descriptionForDescribe: string) {
-            const encoded_actual =  Utils.encodeString(actual);
+            const encoded_actual = Utils.encodeString(actual);
             if (expected != encoded_actual) {
                 // Overwrite & issue error
                 const errMsg = "The baseline file " + relativeFileName + " has changed.";
diff --git a/src/harness/harnessLanguageService.ts b/src/harness/harnessLanguageService.ts
index 8aaff65febc..3df0e8e7d8f 100644
--- a/src/harness/harnessLanguageService.ts
+++ b/src/harness/harnessLanguageService.ts
@@ -600,6 +600,10 @@ namespace Harness.LanguageService {
             return this.host.getCurrentDirectory();
         }
 
+        getDirectories(path: string): string[] {
+            return [];
+        }
+
         readDirectory(path: string, extension?: string): string[] {
             throw new Error("Not implemented Yet.");
         }
diff --git a/tests/cases/conformance/typings/typingsLookup1.ts b/tests/cases/conformance/typings/typingsLookup1.ts
new file mode 100644
index 00000000000..702bd4bc21c
--- /dev/null
+++ b/tests/cases/conformance/typings/typingsLookup1.ts
@@ -0,0 +1,10 @@
+// @noImplicitReferences: true
+
+// @filename: tsconfig.json
+{ "files": "a.ts" }
+
+// @filename: node_modules/@types/jquery/index.d.ts
+declare var $: { x: any };
+
+// @filename: a.ts
+$.x;
diff --git a/tests/cases/unittests/cachingInServerLSHost.ts b/tests/cases/unittests/cachingInServerLSHost.ts
index 58bcd76e246..899b59c1600 100644
--- a/tests/cases/unittests/cachingInServerLSHost.ts
+++ b/tests/cases/unittests/cachingInServerLSHost.ts
@@ -46,6 +46,7 @@ module ts {
             getCurrentDirectory: (): string => {
                 return "";
             },
+            getDirectories: (path: string) => [],
             readDirectory: (path: string, extension?: string, exclude?: string[]): string[] => {
                 throw new Error("NYI");
             },
diff --git a/tests/cases/unittests/session.ts b/tests/cases/unittests/session.ts
index ee9742482cd..40be5fee411 100644
--- a/tests/cases/unittests/session.ts
+++ b/tests/cases/unittests/session.ts
@@ -14,6 +14,7 @@ namespace ts.server {
         resolvePath(): string { return void 0; },
         fileExists: () => false,
         directoryExists: () => false,
+        getDirectories: () => [],
         createDirectory(): void {},
         getExecutingFilePath(): string { return void 0; },
         getCurrentDirectory(): string { return void 0; },

From f0e3ebe37db16914a609130c0f4390a8bd9bedf5 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Wed, 18 May 2016 11:12:02 -0700
Subject: [PATCH 045/332] Lint

---
 src/compiler/program.ts | 8 +++-----
 src/harness/harness.ts  | 2 +-
 2 files changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index c8761555d12..ba21461e2a0 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -18,8 +18,6 @@ namespace ts {
         "node_modules/@types/",
     ];
 
-    const autoImportedTypePaths = ["types", "node_modules/@types"];
-
     export const version = "1.9.0";
 
     export function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean): string {
@@ -878,8 +876,8 @@ namespace ts {
         }
 
         function getDefaultTypeDirectiveNames(rootPath: string): string[] {
-            const localTypes = combinePaths(rootPath, 'types');
-            const npmTypes = combinePaths(rootPath, 'node_modules/@types');
+            const localTypes = combinePaths(rootPath, "types");
+            const npmTypes = combinePaths(rootPath, "node_modules/@types");
             let result: string[] = [];
             if (sys.directoryExists(localTypes)) {
                 result = result.concat(sys.getDirectories(localTypes));
@@ -1029,7 +1027,7 @@ namespace ts {
             else {
                 // or load all types from the automatic type import fields
                 if (host.getDefaultTypeDirectiveNames) {
-                    typeReferences = host.getDefaultTypeDirectiveNames(getCommonSourceDirectory());;
+                    typeReferences = host.getDefaultTypeDirectiveNames(getCommonSourceDirectory());
                 }
             }
 
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index ca8102b2ff4..92482386138 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -905,7 +905,7 @@ namespace Harness {
                     fileMap.forEachValue((key, value) => {
                         const rx = /node_modules\/@types\/(\w+)/;
                         const typeNameResult = rx.exec(key);
-                        if(typeNameResult) {
+                        if (typeNameResult) {
                             const typeName = typeNameResult[1];
                             if (results.indexOf(typeName) < 0) {
                                 results.push(typeName);

From 58b11b631ffc179a7b9fe348101c19ab3f4a9068 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Wed, 18 May 2016 11:30:40 -0700
Subject: [PATCH 046/332] Baseline accept and reorder program logic so common
 source dir is right

---
 src/compiler/program.ts                       |  8 +++-
 ...CompilationExternalPackageError.errors.txt | 19 --------
 ...ileCompilationExternalPackageError.symbols | 25 ++++++++++
 ...sFileCompilationExternalPackageError.types | 34 +++++++++++++
 .../reference/library-reference-11.trace.json | 12 ++++-
 .../reference/library-reference-12.trace.json | 12 ++++-
 .../reference/library-reference-15.trace.json | 45 +++++++++++++++--
 .../reference/library-reference-5.trace.json  | 48 +++++++++++++++----
 .../reference/library-reference-7.trace.json  | 12 ++++-
 .../reference/nodeResolution5.errors.txt      | 14 ------
 .../reference/nodeResolution5.symbols         | 11 +++++
 .../baselines/reference/nodeResolution5.types | 11 +++++
 .../reference/nodeResolution6.errors.txt      | 17 -------
 .../reference/nodeResolution6.symbols         | 15 ++++++
 .../baselines/reference/nodeResolution6.types | 16 +++++++
 .../reference/nodeResolution7.errors.txt      | 14 ------
 .../reference/nodeResolution7.symbols         | 11 +++++
 .../baselines/reference/nodeResolution7.types | 11 +++++
 .../reference/nodeResolution8.errors.txt      | 16 -------
 .../reference/nodeResolution8.symbols         | 15 ++++++
 .../baselines/reference/nodeResolution8.types | 16 +++++++
 .../typeReferenceDirectives11.trace.json      | 12 ++---
 .../typeReferenceDirectives8.trace.json       | 12 ++---
 tests/baselines/reference/typingsLookup1.js   | 11 +++++
 .../reference/typingsLookup1.symbols          | 11 +++++
 .../baselines/reference/typingsLookup1.types  | 11 +++++
 26 files changed, 328 insertions(+), 111 deletions(-)
 delete mode 100644 tests/baselines/reference/jsFileCompilationExternalPackageError.errors.txt
 create mode 100644 tests/baselines/reference/jsFileCompilationExternalPackageError.symbols
 create mode 100644 tests/baselines/reference/jsFileCompilationExternalPackageError.types
 delete mode 100644 tests/baselines/reference/nodeResolution5.errors.txt
 create mode 100644 tests/baselines/reference/nodeResolution5.symbols
 create mode 100644 tests/baselines/reference/nodeResolution5.types
 delete mode 100644 tests/baselines/reference/nodeResolution6.errors.txt
 create mode 100644 tests/baselines/reference/nodeResolution6.symbols
 create mode 100644 tests/baselines/reference/nodeResolution6.types
 delete mode 100644 tests/baselines/reference/nodeResolution7.errors.txt
 create mode 100644 tests/baselines/reference/nodeResolution7.symbols
 create mode 100644 tests/baselines/reference/nodeResolution7.types
 delete mode 100644 tests/baselines/reference/nodeResolution8.errors.txt
 create mode 100644 tests/baselines/reference/nodeResolution8.symbols
 create mode 100644 tests/baselines/reference/nodeResolution8.types
 create mode 100644 tests/baselines/reference/typingsLookup1.js
 create mode 100644 tests/baselines/reference/typingsLookup1.symbols
 create mode 100644 tests/baselines/reference/typingsLookup1.types

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index ba21461e2a0..5ada898acb6 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -1019,6 +1019,8 @@ namespace ts {
         const filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? createFileMap<SourceFile>(fileName => fileName.toLowerCase()) : undefined;
 
         if (!tryReuseStructureFromOldProgram()) {
+            forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false));
+
             // load type declarations specified via 'types' argument
             let typeReferences: string[];
             if (options.types) {
@@ -1027,7 +1029,10 @@ namespace ts {
             else {
                 // or load all types from the automatic type import fields
                 if (host.getDefaultTypeDirectiveNames) {
-                    typeReferences = host.getDefaultTypeDirectiveNames(getCommonSourceDirectory());
+                    const commonRoot = getCommonSourceDirectory();
+                    if (commonRoot) {
+                        typeReferences = host.getDefaultTypeDirectiveNames(commonRoot);
+                    }
                 }
             }
 
@@ -1038,7 +1043,6 @@ namespace ts {
                 }
             }
 
-            forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false));
             // Do not process the default library if:
             //  - The '--noLib' flag is used.
             //  - A 'no-default-lib' reference comment is encountered in
diff --git a/tests/baselines/reference/jsFileCompilationExternalPackageError.errors.txt b/tests/baselines/reference/jsFileCompilationExternalPackageError.errors.txt
deleted file mode 100644
index 58111c777f1..00000000000
--- a/tests/baselines/reference/jsFileCompilationExternalPackageError.errors.txt
+++ /dev/null
@@ -1,19 +0,0 @@
-tests/cases/compiler/moduleA/a.js(2,17): error TS2656: Exported external package typings file 'tests/cases/compiler/node_modules/b.ts' is not a module. Please contact the package author to update the package definition.
-
-
-==== tests/cases/compiler/moduleA/a.js (1 errors) ====
-    
-    import {a} from "b";
-                    ~~~
-!!! error TS2656: Exported external package typings file 'b.ts' is not a module. Please contact the package author to update the package definition.
-    a++;
-    import {c} from "c";
-    c++;
-    
-==== tests/cases/compiler/node_modules/b.ts (0 errors) ====
-    var a = 10;
-    
-==== tests/cases/compiler/node_modules/c.js (0 errors) ====
-    exports.a = 10;
-    c = 10;
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/jsFileCompilationExternalPackageError.symbols b/tests/baselines/reference/jsFileCompilationExternalPackageError.symbols
new file mode 100644
index 00000000000..fcb678c3e6c
--- /dev/null
+++ b/tests/baselines/reference/jsFileCompilationExternalPackageError.symbols
@@ -0,0 +1,25 @@
+=== tests/cases/compiler/moduleA/a.js ===
+
+import {a} from "b";
+>a : Symbol(a, Decl(a.js, 1, 8))
+
+a++;
+>a : Symbol(a, Decl(a.js, 1, 8))
+
+import {c} from "c";
+>c : Symbol(c, Decl(a.js, 3, 8))
+
+c++;
+>c : Symbol(c, Decl(a.js, 3, 8))
+
+=== tests/cases/compiler/node_modules/b.ts ===
+var a = 10;
+>a : Symbol(a, Decl(b.ts, 0, 3))
+
+=== tests/cases/compiler/node_modules/c.js ===
+exports.a = 10;
+>exports : Symbol(a, Decl(c.js, 0, 0))
+>a : Symbol(a, Decl(c.js, 0, 0))
+
+c = 10;
+
diff --git a/tests/baselines/reference/jsFileCompilationExternalPackageError.types b/tests/baselines/reference/jsFileCompilationExternalPackageError.types
new file mode 100644
index 00000000000..ae2eb085f28
--- /dev/null
+++ b/tests/baselines/reference/jsFileCompilationExternalPackageError.types
@@ -0,0 +1,34 @@
+=== tests/cases/compiler/moduleA/a.js ===
+
+import {a} from "b";
+>a : any
+
+a++;
+>a++ : number
+>a : any
+
+import {c} from "c";
+>c : any
+
+c++;
+>c++ : number
+>c : any
+
+=== tests/cases/compiler/node_modules/b.ts ===
+var a = 10;
+>a : number
+>10 : number
+
+=== tests/cases/compiler/node_modules/c.js ===
+exports.a = 10;
+>exports.a = 10 : number
+>exports.a : any
+>exports : any
+>a : any
+>10 : number
+
+c = 10;
+>c = 10 : number
+>c : any
+>10 : number
+
diff --git a/tests/baselines/reference/library-reference-11.trace.json b/tests/baselines/reference/library-reference-11.trace.json
index e0af1e39c5a..e81a7e3e158 100644
--- a/tests/baselines/reference/library-reference-11.trace.json
+++ b/tests/baselines/reference/library-reference-11.trace.json
@@ -1,6 +1,14 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory not set. ========",
-    "Root directory cannot be determined, skipping primary search paths.",
+    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory 'C:\\github\\TypeScript'. ========",
+    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
+    "File 'C:\\github\\TypeScript/types/jquery/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/types/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
+    "File 'C:\\github\\TypeScript/node_modules/jquery/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
+    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/a/b'",
     "File '/a/b/node_modules/jquery.ts' does not exist.",
     "File '/a/b/node_modules/jquery.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-12.trace.json b/tests/baselines/reference/library-reference-12.trace.json
index 2cdf1f5f20a..d46fc884f35 100644
--- a/tests/baselines/reference/library-reference-12.trace.json
+++ b/tests/baselines/reference/library-reference-12.trace.json
@@ -1,6 +1,14 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory not set. ========",
-    "Root directory cannot be determined, skipping primary search paths.",
+    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory 'C:\\github\\TypeScript'. ========",
+    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
+    "File 'C:\\github\\TypeScript/types/jquery/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/types/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
+    "File 'C:\\github\\TypeScript/node_modules/jquery/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
+    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/a/b'",
     "File '/a/b/node_modules/jquery.ts' does not exist.",
     "File '/a/b/node_modules/jquery.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-15.trace.json b/tests/baselines/reference/library-reference-15.trace.json
index 9a19d75ffac..09c891bc5b1 100644
--- a/tests/baselines/reference/library-reference-15.trace.json
+++ b/tests/baselines/reference/library-reference-15.trace.json
@@ -1,5 +1,44 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file not set, root directory not set. ========",
-    "Root directory cannot be determined, skipping primary search paths.",
-    "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder."
+    "======== Resolving type reference directive 'jquery', containing file not set, root directory 'C:\\github\\TypeScript'. ========",
+    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
+    "File 'C:\\github\\TypeScript/types/jquery/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/types/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
+    "File 'C:\\github\\TypeScript/node_modules/jquery/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
+    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/index.d.ts' does not exist.",
+    "Looking up in 'node_modules' folder, initial location 'C:\\github\\TypeScript'",
+    "File 'C:/github/TypeScript/node_modules/jquery.ts' does not exist.",
+    "File 'C:/github/TypeScript/node_modules/jquery.d.ts' does not exist.",
+    "File 'C:/github/TypeScript/node_modules/jquery/package.json' does not exist.",
+    "File 'C:/github/TypeScript/node_modules/jquery/index.ts' does not exist.",
+    "File 'C:/github/TypeScript/node_modules/jquery/index.d.ts' does not exist.",
+    "File 'C:/github/TypeScript/node_modules/@types/jquery.ts' does not exist.",
+    "File 'C:/github/TypeScript/node_modules/@types/jquery.d.ts' does not exist.",
+    "File 'C:/github/TypeScript/node_modules/@types/jquery/package.json' does not exist.",
+    "File 'C:/github/TypeScript/node_modules/@types/jquery/index.ts' does not exist.",
+    "File 'C:/github/TypeScript/node_modules/@types/jquery/index.d.ts' does not exist.",
+    "File 'C:/github/node_modules/jquery.ts' does not exist.",
+    "File 'C:/github/node_modules/jquery.d.ts' does not exist.",
+    "File 'C:/github/node_modules/jquery/package.json' does not exist.",
+    "File 'C:/github/node_modules/jquery/index.ts' does not exist.",
+    "File 'C:/github/node_modules/jquery/index.d.ts' does not exist.",
+    "File 'C:/github/node_modules/@types/jquery.ts' does not exist.",
+    "File 'C:/github/node_modules/@types/jquery.d.ts' does not exist.",
+    "File 'C:/github/node_modules/@types/jquery/package.json' does not exist.",
+    "File 'C:/github/node_modules/@types/jquery/index.ts' does not exist.",
+    "File 'C:/github/node_modules/@types/jquery/index.d.ts' does not exist.",
+    "File 'C:/node_modules/jquery.ts' does not exist.",
+    "File 'C:/node_modules/jquery.d.ts' does not exist.",
+    "File 'C:/node_modules/jquery/package.json' does not exist.",
+    "File 'C:/node_modules/jquery/index.ts' does not exist.",
+    "File 'C:/node_modules/jquery/index.d.ts' does not exist.",
+    "File 'C:/node_modules/@types/jquery.ts' does not exist.",
+    "File 'C:/node_modules/@types/jquery.d.ts' does not exist.",
+    "File 'C:/node_modules/@types/jquery/package.json' does not exist.",
+    "File 'C:/node_modules/@types/jquery/index.ts' does not exist.",
+    "File 'C:/node_modules/@types/jquery/index.d.ts' does not exist.",
+    "======== Type reference directive 'jquery' was not resolved. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/library-reference-5.trace.json b/tests/baselines/reference/library-reference-5.trace.json
index 272009782b5..cf016cbe431 100644
--- a/tests/baselines/reference/library-reference-5.trace.json
+++ b/tests/baselines/reference/library-reference-5.trace.json
@@ -1,6 +1,14 @@
 [
-    "======== Resolving type reference directive 'foo', containing file '/src/root.ts', root directory not set. ========",
-    "Root directory cannot be determined, skipping primary search paths.",
+    "======== Resolving type reference directive 'foo', containing file '/src/root.ts', root directory 'C:\\github\\TypeScript'. ========",
+    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
+    "File 'C:\\github\\TypeScript/types/foo/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/types/foo/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
+    "File 'C:\\github\\TypeScript/node_modules/foo/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/foo/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
+    "File 'C:\\github\\TypeScript/node_modules/@types/foo/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/@types/foo/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/src'",
     "File '/src/node_modules/foo.ts' does not exist.",
     "File '/src/node_modules/foo.d.ts' does not exist.",
@@ -18,8 +26,16 @@
     "File '/node_modules/foo/index.ts' does not exist.",
     "File '/node_modules/foo/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'foo' was successfully resolved to '/node_modules/foo/index.d.ts', primary: false. ========",
-    "======== Resolving type reference directive 'bar', containing file '/src/root.ts', root directory not set. ========",
-    "Root directory cannot be determined, skipping primary search paths.",
+    "======== Resolving type reference directive 'bar', containing file '/src/root.ts', root directory 'C:\\github\\TypeScript'. ========",
+    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
+    "File 'C:\\github\\TypeScript/types/bar/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/types/bar/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
+    "File 'C:\\github\\TypeScript/node_modules/bar/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/bar/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
+    "File 'C:\\github\\TypeScript/node_modules/@types/bar/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/@types/bar/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/src'",
     "File '/src/node_modules/bar.ts' does not exist.",
     "File '/src/node_modules/bar.d.ts' does not exist.",
@@ -37,8 +53,16 @@
     "File '/node_modules/bar/index.ts' does not exist.",
     "File '/node_modules/bar/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'bar' was successfully resolved to '/node_modules/bar/index.d.ts', primary: false. ========",
-    "======== Resolving type reference directive 'alpha', containing file '/node_modules/foo/index.d.ts', root directory not set. ========",
-    "Root directory cannot be determined, skipping primary search paths.",
+    "======== Resolving type reference directive 'alpha', containing file '/node_modules/foo/index.d.ts', root directory 'C:\\github\\TypeScript'. ========",
+    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
+    "File 'C:\\github\\TypeScript/types/alpha/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/types/alpha/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
+    "File 'C:\\github\\TypeScript/node_modules/alpha/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/alpha/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
+    "File 'C:\\github\\TypeScript/node_modules/@types/alpha/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/@types/alpha/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/node_modules/foo'",
     "File '/node_modules/foo/node_modules/alpha.ts' does not exist.",
     "File '/node_modules/foo/node_modules/alpha.d.ts' does not exist.",
@@ -46,8 +70,16 @@
     "File '/node_modules/foo/node_modules/alpha/index.ts' does not exist.",
     "File '/node_modules/foo/node_modules/alpha/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'alpha' was successfully resolved to '/node_modules/foo/node_modules/alpha/index.d.ts', primary: false. ========",
-    "======== Resolving type reference directive 'alpha', containing file '/node_modules/bar/index.d.ts', root directory not set. ========",
-    "Root directory cannot be determined, skipping primary search paths.",
+    "======== Resolving type reference directive 'alpha', containing file '/node_modules/bar/index.d.ts', root directory 'C:\\github\\TypeScript'. ========",
+    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
+    "File 'C:\\github\\TypeScript/types/alpha/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/types/alpha/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
+    "File 'C:\\github\\TypeScript/node_modules/alpha/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/alpha/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
+    "File 'C:\\github\\TypeScript/node_modules/@types/alpha/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/@types/alpha/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/node_modules/bar'",
     "File '/node_modules/bar/node_modules/alpha.ts' does not exist.",
     "File '/node_modules/bar/node_modules/alpha.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-7.trace.json b/tests/baselines/reference/library-reference-7.trace.json
index 419fe6d055d..bed3cb4fe40 100644
--- a/tests/baselines/reference/library-reference-7.trace.json
+++ b/tests/baselines/reference/library-reference-7.trace.json
@@ -1,6 +1,14 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/src/consumer.ts', root directory not set. ========",
-    "Root directory cannot be determined, skipping primary search paths.",
+    "======== Resolving type reference directive 'jquery', containing file '/src/consumer.ts', root directory 'C:\\github\\TypeScript'. ========",
+    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
+    "File 'C:\\github\\TypeScript/types/jquery/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/types/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
+    "File 'C:\\github\\TypeScript/node_modules/jquery/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
+    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/package.json' does not exist.",
+    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/src'",
     "File '/src/node_modules/jquery.ts' does not exist.",
     "File '/src/node_modules/jquery.d.ts' does not exist.",
diff --git a/tests/baselines/reference/nodeResolution5.errors.txt b/tests/baselines/reference/nodeResolution5.errors.txt
deleted file mode 100644
index c36cce45b6d..00000000000
--- a/tests/baselines/reference/nodeResolution5.errors.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-tests/cases/compiler/b.ts(1,20): error TS2656: Exported external package typings file 'tests/cases/compiler/node_modules/a.d.ts' is not a module. Please contact the package author to update the package definition.
-
-
-==== tests/cases/compiler/b.ts (1 errors) ====
-    import y = require("a"); 
-                       ~~~
-!!! error TS2656: Exported external package typings file 'a.d.ts' is not a module. Please contact the package author to update the package definition.
-    
-==== tests/cases/compiler/node_modules/a.d.ts (0 errors) ====
-    
-    declare module "a" {
-        var x: number;
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/nodeResolution5.symbols b/tests/baselines/reference/nodeResolution5.symbols
new file mode 100644
index 00000000000..be4aa2be0e9
--- /dev/null
+++ b/tests/baselines/reference/nodeResolution5.symbols
@@ -0,0 +1,11 @@
+=== tests/cases/compiler/b.ts ===
+import y = require("a"); 
+>y : Symbol(y, Decl(b.ts, 0, 0))
+
+=== tests/cases/compiler/node_modules/a.d.ts ===
+
+declare module "a" {
+    var x: number;
+>x : Symbol(x, Decl(a.d.ts, 2, 7))
+}
+
diff --git a/tests/baselines/reference/nodeResolution5.types b/tests/baselines/reference/nodeResolution5.types
new file mode 100644
index 00000000000..14f5bd24f5d
--- /dev/null
+++ b/tests/baselines/reference/nodeResolution5.types
@@ -0,0 +1,11 @@
+=== tests/cases/compiler/b.ts ===
+import y = require("a"); 
+>y : typeof y
+
+=== tests/cases/compiler/node_modules/a.d.ts ===
+
+declare module "a" {
+    var x: number;
+>x : number
+}
+
diff --git a/tests/baselines/reference/nodeResolution6.errors.txt b/tests/baselines/reference/nodeResolution6.errors.txt
deleted file mode 100644
index 6bab6e34389..00000000000
--- a/tests/baselines/reference/nodeResolution6.errors.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-tests/cases/compiler/node_modules/a.d.ts(1,1): error TS2654: Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition.
-
-
-==== tests/cases/compiler/b.ts (0 errors) ====
-    import y = require("a"); 
-    
-==== tests/cases/compiler/node_modules/ref.ts (0 errors) ====
-    
-    var x = 1;
-    
-==== tests/cases/compiler/node_modules/a.d.ts (1 errors) ====
-    /// <reference path="ref.ts"/>
-    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2654: Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition.
-    export declare var y;
-    
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/nodeResolution6.symbols b/tests/baselines/reference/nodeResolution6.symbols
new file mode 100644
index 00000000000..075f94e7992
--- /dev/null
+++ b/tests/baselines/reference/nodeResolution6.symbols
@@ -0,0 +1,15 @@
+=== tests/cases/compiler/b.ts ===
+import y = require("a"); 
+>y : Symbol(y, Decl(b.ts, 0, 0))
+
+=== tests/cases/compiler/node_modules/ref.ts ===
+
+var x = 1;
+>x : Symbol(x, Decl(ref.ts, 1, 3))
+
+=== tests/cases/compiler/node_modules/a.d.ts ===
+/// <reference path="ref.ts"/>
+export declare var y;
+>y : Symbol(y, Decl(a.d.ts, 1, 18))
+
+
diff --git a/tests/baselines/reference/nodeResolution6.types b/tests/baselines/reference/nodeResolution6.types
new file mode 100644
index 00000000000..13c5d6d9276
--- /dev/null
+++ b/tests/baselines/reference/nodeResolution6.types
@@ -0,0 +1,16 @@
+=== tests/cases/compiler/b.ts ===
+import y = require("a"); 
+>y : typeof y
+
+=== tests/cases/compiler/node_modules/ref.ts ===
+
+var x = 1;
+>x : number
+>1 : number
+
+=== tests/cases/compiler/node_modules/a.d.ts ===
+/// <reference path="ref.ts"/>
+export declare var y;
+>y : any
+
+
diff --git a/tests/baselines/reference/nodeResolution7.errors.txt b/tests/baselines/reference/nodeResolution7.errors.txt
deleted file mode 100644
index f9e8ef7ac0f..00000000000
--- a/tests/baselines/reference/nodeResolution7.errors.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-tests/cases/compiler/b.ts(1,20): error TS2656: Exported external package typings file 'tests/cases/compiler/node_modules/a/index.d.ts' is not a module. Please contact the package author to update the package definition.
-
-
-==== tests/cases/compiler/b.ts (1 errors) ====
-    import y = require("a"); 
-                       ~~~
-!!! error TS2656: Exported external package typings file 'index.d.ts' is not a module. Please contact the package author to update the package definition.
-    
-==== tests/cases/compiler/node_modules/a/index.d.ts (0 errors) ====
-    
-    declare module "a" {
-        var x: number;
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/nodeResolution7.symbols b/tests/baselines/reference/nodeResolution7.symbols
new file mode 100644
index 00000000000..ea8d636b61b
--- /dev/null
+++ b/tests/baselines/reference/nodeResolution7.symbols
@@ -0,0 +1,11 @@
+=== tests/cases/compiler/b.ts ===
+import y = require("a"); 
+>y : Symbol(y, Decl(b.ts, 0, 0))
+
+=== tests/cases/compiler/node_modules/a/index.d.ts ===
+
+declare module "a" {
+    var x: number;
+>x : Symbol(x, Decl(index.d.ts, 2, 7))
+}
+
diff --git a/tests/baselines/reference/nodeResolution7.types b/tests/baselines/reference/nodeResolution7.types
new file mode 100644
index 00000000000..1cb14150bde
--- /dev/null
+++ b/tests/baselines/reference/nodeResolution7.types
@@ -0,0 +1,11 @@
+=== tests/cases/compiler/b.ts ===
+import y = require("a"); 
+>y : typeof y
+
+=== tests/cases/compiler/node_modules/a/index.d.ts ===
+
+declare module "a" {
+    var x: number;
+>x : number
+}
+
diff --git a/tests/baselines/reference/nodeResolution8.errors.txt b/tests/baselines/reference/nodeResolution8.errors.txt
deleted file mode 100644
index 3f14a4313c8..00000000000
--- a/tests/baselines/reference/nodeResolution8.errors.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-tests/cases/compiler/node_modules/a/index.d.ts(1,1): error TS2654: Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition.
-
-
-==== tests/cases/compiler/b.ts (0 errors) ====
-    import y = require("a");
-==== tests/cases/compiler/node_modules/a/ref.ts (0 errors) ====
-    
-    var x = 1;
-    
-==== tests/cases/compiler/node_modules/a/index.d.ts (1 errors) ====
-    /// <reference path="ref.ts"/>
-    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2654: Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition.
-    export declare var y;
-    
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/nodeResolution8.symbols b/tests/baselines/reference/nodeResolution8.symbols
new file mode 100644
index 00000000000..27c0941c9b9
--- /dev/null
+++ b/tests/baselines/reference/nodeResolution8.symbols
@@ -0,0 +1,15 @@
+=== tests/cases/compiler/b.ts ===
+import y = require("a");
+>y : Symbol(y, Decl(b.ts, 0, 0))
+
+=== tests/cases/compiler/node_modules/a/ref.ts ===
+
+var x = 1;
+>x : Symbol(x, Decl(ref.ts, 1, 3))
+
+=== tests/cases/compiler/node_modules/a/index.d.ts ===
+/// <reference path="ref.ts"/>
+export declare var y;
+>y : Symbol(y, Decl(index.d.ts, 1, 18))
+
+
diff --git a/tests/baselines/reference/nodeResolution8.types b/tests/baselines/reference/nodeResolution8.types
new file mode 100644
index 00000000000..cced0d3008d
--- /dev/null
+++ b/tests/baselines/reference/nodeResolution8.types
@@ -0,0 +1,16 @@
+=== tests/cases/compiler/b.ts ===
+import y = require("a");
+>y : typeof y
+
+=== tests/cases/compiler/node_modules/a/ref.ts ===
+
+var x = 1;
+>x : number
+>1 : number
+
+=== tests/cases/compiler/node_modules/a/index.d.ts ===
+/// <reference path="ref.ts"/>
+export declare var y;
+>y : any
+
+
diff --git a/tests/baselines/reference/typeReferenceDirectives11.trace.json b/tests/baselines/reference/typeReferenceDirectives11.trace.json
index be060569d83..bfaae056c9e 100644
--- a/tests/baselines/reference/typeReferenceDirectives11.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives11.trace.json
@@ -1,12 +1,12 @@
 [
-    "======== Resolving type reference directive 'lib', containing file not set, root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/lib/package.json' does not exist.",
-    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========",
     "======== Resolving module './mod1' from '/mod2.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
     "Loading module as file / folder, candidate module location '/mod1'.",
     "File '/mod1.ts' exist - use it as a name resolution result.",
-    "======== Module name './mod1' was successfully resolved to '/mod1.ts'. ========"
+    "======== Module name './mod1' was successfully resolved to '/mod1.ts'. ========",
+    "======== Resolving type reference directive 'lib', containing file not set, root directory '/'. ========",
+    "Resolving with primary search path '/types/'",
+    "File '/types/lib/package.json' does not exist.",
+    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/typeReferenceDirectives8.trace.json b/tests/baselines/reference/typeReferenceDirectives8.trace.json
index be060569d83..bfaae056c9e 100644
--- a/tests/baselines/reference/typeReferenceDirectives8.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives8.trace.json
@@ -1,12 +1,12 @@
 [
-    "======== Resolving type reference directive 'lib', containing file not set, root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/lib/package.json' does not exist.",
-    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========",
     "======== Resolving module './mod1' from '/mod2.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
     "Loading module as file / folder, candidate module location '/mod1'.",
     "File '/mod1.ts' exist - use it as a name resolution result.",
-    "======== Module name './mod1' was successfully resolved to '/mod1.ts'. ========"
+    "======== Module name './mod1' was successfully resolved to '/mod1.ts'. ========",
+    "======== Resolving type reference directive 'lib', containing file not set, root directory '/'. ========",
+    "Resolving with primary search path '/types/'",
+    "File '/types/lib/package.json' does not exist.",
+    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/typingsLookup1.js b/tests/baselines/reference/typingsLookup1.js
new file mode 100644
index 00000000000..1f89a2277aa
--- /dev/null
+++ b/tests/baselines/reference/typingsLookup1.js
@@ -0,0 +1,11 @@
+//// [tests/cases/conformance/typings/typingsLookup1.ts] ////
+
+//// [index.d.ts]
+declare var $: { x: any };
+
+//// [a.ts]
+$.x;
+
+
+//// [a.js]
+$.x;
diff --git a/tests/baselines/reference/typingsLookup1.symbols b/tests/baselines/reference/typingsLookup1.symbols
new file mode 100644
index 00000000000..8a21252d123
--- /dev/null
+++ b/tests/baselines/reference/typingsLookup1.symbols
@@ -0,0 +1,11 @@
+=== tests/cases/conformance/typings/a.ts ===
+$.x;
+>$.x : Symbol(x, Decl(index.d.ts, 0, 16))
+>$ : Symbol($, Decl(index.d.ts, 0, 11))
+>x : Symbol(x, Decl(index.d.ts, 0, 16))
+
+=== tests/cases/conformance/typings/node_modules/@types/jquery/index.d.ts ===
+declare var $: { x: any };
+>$ : Symbol($, Decl(index.d.ts, 0, 11))
+>x : Symbol(x, Decl(index.d.ts, 0, 16))
+
diff --git a/tests/baselines/reference/typingsLookup1.types b/tests/baselines/reference/typingsLookup1.types
new file mode 100644
index 00000000000..ca79a8248d5
--- /dev/null
+++ b/tests/baselines/reference/typingsLookup1.types
@@ -0,0 +1,11 @@
+=== tests/cases/conformance/typings/a.ts ===
+$.x;
+>$.x : any
+>$ : { x: any; }
+>x : any
+
+=== tests/cases/conformance/typings/node_modules/@types/jquery/index.d.ts ===
+declare var $: { x: any };
+>$ : { x: any; }
+>x : any
+

From 0e273e190e7564a7ed772d93ab05d7716782dd45 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Wed, 18 May 2016 14:37:40 -0700
Subject: [PATCH 047/332] Get rid of disk-based paths in baselines

---
 src/harness/compilerRunner.ts                 |   2 +-
 src/harness/harness.ts                        |   1 +
 .../reference/library-reference-11.trace.json |  20 ++--
 .../reference/library-reference-12.trace.json |  20 ++--
 .../reference/library-reference-15.trace.json |  62 ++++-------
 .../reference/library-reference-5.trace.json  | 102 ++++++------------
 .../reference/library-reference-7.trace.json  |  20 ++--
 .../references/library-reference-11.ts        |   1 +
 .../references/library-reference-12.ts        |   1 +
 .../references/library-reference-15.ts        |   1 +
 .../references/library-reference-5.ts         |   1 +
 .../references/library-reference-7.ts         |   1 +
 12 files changed, 90 insertions(+), 142 deletions(-)

diff --git a/src/harness/compilerRunner.ts b/src/harness/compilerRunner.ts
index 1ddbd1ea331..1069a1bc97e 100644
--- a/src/harness/compilerRunner.ts
+++ b/src/harness/compilerRunner.ts
@@ -107,7 +107,7 @@ class CompilerBaselineRunner extends RunnerBase {
                 }
 
                 const output = Harness.Compiler.compileFiles(
-                    toBeCompiled, otherFiles, harnessSettings, /*options*/ tsConfigOptions, /*currentDirectory*/ undefined);
+                    toBeCompiled, otherFiles, harnessSettings, /*options*/ tsConfigOptions, /*currentDirectory*/ harnessSettings['currentDirectory']);
 
                 options = output.options;
                 result = output.result;
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index 92482386138..5b26829cf4a 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -953,6 +953,7 @@ namespace Harness {
             { name: "noErrorTruncation", type: "boolean" },
             { name: "suppressOutputPathCheck", type: "boolean" },
             { name: "noImplicitReferences", type: "boolean" },
+            { name: "currentDirectory", type: "string" },
             { name: "symlink", type: "string" }
         ];
 
diff --git a/tests/baselines/reference/library-reference-11.trace.json b/tests/baselines/reference/library-reference-11.trace.json
index e81a7e3e158..62d828d57d6 100644
--- a/tests/baselines/reference/library-reference-11.trace.json
+++ b/tests/baselines/reference/library-reference-11.trace.json
@@ -1,14 +1,14 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory 'C:\\github\\TypeScript'. ========",
-    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
-    "File 'C:\\github\\TypeScript/types/jquery/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/types/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
-    "File 'C:\\github\\TypeScript/node_modules/jquery/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
-    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/index.d.ts' does not exist.",
+    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory '/'. ========",
+    "Resolving with primary search path '/types/'",
+    "File '/types/jquery/package.json' does not exist.",
+    "File '/types/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/'",
+    "File '/node_modules/jquery/package.json' does not exist.",
+    "File '/node_modules/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/@types/'",
+    "File '/node_modules/@types/jquery/package.json' does not exist.",
+    "File '/node_modules/@types/jquery/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/a/b'",
     "File '/a/b/node_modules/jquery.ts' does not exist.",
     "File '/a/b/node_modules/jquery.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-12.trace.json b/tests/baselines/reference/library-reference-12.trace.json
index d46fc884f35..abe1f6c0f46 100644
--- a/tests/baselines/reference/library-reference-12.trace.json
+++ b/tests/baselines/reference/library-reference-12.trace.json
@@ -1,14 +1,14 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory 'C:\\github\\TypeScript'. ========",
-    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
-    "File 'C:\\github\\TypeScript/types/jquery/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/types/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
-    "File 'C:\\github\\TypeScript/node_modules/jquery/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
-    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/index.d.ts' does not exist.",
+    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory '/'. ========",
+    "Resolving with primary search path '/types/'",
+    "File '/types/jquery/package.json' does not exist.",
+    "File '/types/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/'",
+    "File '/node_modules/jquery/package.json' does not exist.",
+    "File '/node_modules/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/@types/'",
+    "File '/node_modules/@types/jquery/package.json' does not exist.",
+    "File '/node_modules/@types/jquery/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/a/b'",
     "File '/a/b/node_modules/jquery.ts' does not exist.",
     "File '/a/b/node_modules/jquery.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-15.trace.json b/tests/baselines/reference/library-reference-15.trace.json
index 09c891bc5b1..b8029a0b61f 100644
--- a/tests/baselines/reference/library-reference-15.trace.json
+++ b/tests/baselines/reference/library-reference-15.trace.json
@@ -1,44 +1,24 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file not set, root directory 'C:\\github\\TypeScript'. ========",
-    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
-    "File 'C:\\github\\TypeScript/types/jquery/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/types/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
-    "File 'C:\\github\\TypeScript/node_modules/jquery/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
-    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/index.d.ts' does not exist.",
-    "Looking up in 'node_modules' folder, initial location 'C:\\github\\TypeScript'",
-    "File 'C:/github/TypeScript/node_modules/jquery.ts' does not exist.",
-    "File 'C:/github/TypeScript/node_modules/jquery.d.ts' does not exist.",
-    "File 'C:/github/TypeScript/node_modules/jquery/package.json' does not exist.",
-    "File 'C:/github/TypeScript/node_modules/jquery/index.ts' does not exist.",
-    "File 'C:/github/TypeScript/node_modules/jquery/index.d.ts' does not exist.",
-    "File 'C:/github/TypeScript/node_modules/@types/jquery.ts' does not exist.",
-    "File 'C:/github/TypeScript/node_modules/@types/jquery.d.ts' does not exist.",
-    "File 'C:/github/TypeScript/node_modules/@types/jquery/package.json' does not exist.",
-    "File 'C:/github/TypeScript/node_modules/@types/jquery/index.ts' does not exist.",
-    "File 'C:/github/TypeScript/node_modules/@types/jquery/index.d.ts' does not exist.",
-    "File 'C:/github/node_modules/jquery.ts' does not exist.",
-    "File 'C:/github/node_modules/jquery.d.ts' does not exist.",
-    "File 'C:/github/node_modules/jquery/package.json' does not exist.",
-    "File 'C:/github/node_modules/jquery/index.ts' does not exist.",
-    "File 'C:/github/node_modules/jquery/index.d.ts' does not exist.",
-    "File 'C:/github/node_modules/@types/jquery.ts' does not exist.",
-    "File 'C:/github/node_modules/@types/jquery.d.ts' does not exist.",
-    "File 'C:/github/node_modules/@types/jquery/package.json' does not exist.",
-    "File 'C:/github/node_modules/@types/jquery/index.ts' does not exist.",
-    "File 'C:/github/node_modules/@types/jquery/index.d.ts' does not exist.",
-    "File 'C:/node_modules/jquery.ts' does not exist.",
-    "File 'C:/node_modules/jquery.d.ts' does not exist.",
-    "File 'C:/node_modules/jquery/package.json' does not exist.",
-    "File 'C:/node_modules/jquery/index.ts' does not exist.",
-    "File 'C:/node_modules/jquery/index.d.ts' does not exist.",
-    "File 'C:/node_modules/@types/jquery.ts' does not exist.",
-    "File 'C:/node_modules/@types/jquery.d.ts' does not exist.",
-    "File 'C:/node_modules/@types/jquery/package.json' does not exist.",
-    "File 'C:/node_modules/@types/jquery/index.ts' does not exist.",
-    "File 'C:/node_modules/@types/jquery/index.d.ts' does not exist.",
+    "======== Resolving type reference directive 'jquery', containing file not set, root directory '/'. ========",
+    "Resolving with primary search path '/types/'",
+    "File '/types/jquery/package.json' does not exist.",
+    "File '/types/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/'",
+    "File '/node_modules/jquery/package.json' does not exist.",
+    "File '/node_modules/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/@types/'",
+    "File '/node_modules/@types/jquery/package.json' does not exist.",
+    "File '/node_modules/@types/jquery/index.d.ts' does not exist.",
+    "Looking up in 'node_modules' folder, initial location '/'",
+    "File '/node_modules/jquery.ts' does not exist.",
+    "File '/node_modules/jquery.d.ts' does not exist.",
+    "File '/node_modules/jquery/package.json' does not exist.",
+    "File '/node_modules/jquery/index.ts' does not exist.",
+    "File '/node_modules/jquery/index.d.ts' does not exist.",
+    "File '/node_modules/@types/jquery.ts' does not exist.",
+    "File '/node_modules/@types/jquery.d.ts' does not exist.",
+    "File '/node_modules/@types/jquery/package.json' does not exist.",
+    "File '/node_modules/@types/jquery/index.ts' does not exist.",
+    "File '/node_modules/@types/jquery/index.d.ts' does not exist.",
     "======== Type reference directive 'jquery' was not resolved. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/library-reference-5.trace.json b/tests/baselines/reference/library-reference-5.trace.json
index cf016cbe431..ad34e9e3159 100644
--- a/tests/baselines/reference/library-reference-5.trace.json
+++ b/tests/baselines/reference/library-reference-5.trace.json
@@ -1,68 +1,30 @@
 [
-    "======== Resolving type reference directive 'foo', containing file '/src/root.ts', root directory 'C:\\github\\TypeScript'. ========",
-    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
-    "File 'C:\\github\\TypeScript/types/foo/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/types/foo/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
-    "File 'C:\\github\\TypeScript/node_modules/foo/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/foo/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
-    "File 'C:\\github\\TypeScript/node_modules/@types/foo/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/@types/foo/index.d.ts' does not exist.",
-    "Looking up in 'node_modules' folder, initial location '/src'",
-    "File '/src/node_modules/foo.ts' does not exist.",
-    "File '/src/node_modules/foo.d.ts' does not exist.",
-    "File '/src/node_modules/foo/package.json' does not exist.",
-    "File '/src/node_modules/foo/index.ts' does not exist.",
-    "File '/src/node_modules/foo/index.d.ts' does not exist.",
-    "File '/src/node_modules/@types/foo.ts' does not exist.",
-    "File '/src/node_modules/@types/foo.d.ts' does not exist.",
-    "File '/src/node_modules/@types/foo/package.json' does not exist.",
-    "File '/src/node_modules/@types/foo/index.ts' does not exist.",
-    "File '/src/node_modules/@types/foo/index.d.ts' does not exist.",
-    "File '/node_modules/foo.ts' does not exist.",
-    "File '/node_modules/foo.d.ts' does not exist.",
+    "======== Resolving type reference directive 'foo', containing file '/src/root.ts', root directory '/'. ========",
+    "Resolving with primary search path '/types/'",
+    "File '/types/foo/package.json' does not exist.",
+    "File '/types/foo/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/'",
     "File '/node_modules/foo/package.json' does not exist.",
-    "File '/node_modules/foo/index.ts' does not exist.",
     "File '/node_modules/foo/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'foo' was successfully resolved to '/node_modules/foo/index.d.ts', primary: false. ========",
-    "======== Resolving type reference directive 'bar', containing file '/src/root.ts', root directory 'C:\\github\\TypeScript'. ========",
-    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
-    "File 'C:\\github\\TypeScript/types/bar/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/types/bar/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
-    "File 'C:\\github\\TypeScript/node_modules/bar/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/bar/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
-    "File 'C:\\github\\TypeScript/node_modules/@types/bar/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/@types/bar/index.d.ts' does not exist.",
-    "Looking up in 'node_modules' folder, initial location '/src'",
-    "File '/src/node_modules/bar.ts' does not exist.",
-    "File '/src/node_modules/bar.d.ts' does not exist.",
-    "File '/src/node_modules/bar/package.json' does not exist.",
-    "File '/src/node_modules/bar/index.ts' does not exist.",
-    "File '/src/node_modules/bar/index.d.ts' does not exist.",
-    "File '/src/node_modules/@types/bar.ts' does not exist.",
-    "File '/src/node_modules/@types/bar.d.ts' does not exist.",
-    "File '/src/node_modules/@types/bar/package.json' does not exist.",
-    "File '/src/node_modules/@types/bar/index.ts' does not exist.",
-    "File '/src/node_modules/@types/bar/index.d.ts' does not exist.",
-    "File '/node_modules/bar.ts' does not exist.",
-    "File '/node_modules/bar.d.ts' does not exist.",
+    "======== Type reference directive 'foo' was successfully resolved to '/node_modules/foo/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'bar', containing file '/src/root.ts', root directory '/'. ========",
+    "Resolving with primary search path '/types/'",
+    "File '/types/bar/package.json' does not exist.",
+    "File '/types/bar/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/'",
     "File '/node_modules/bar/package.json' does not exist.",
-    "File '/node_modules/bar/index.ts' does not exist.",
     "File '/node_modules/bar/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'bar' was successfully resolved to '/node_modules/bar/index.d.ts', primary: false. ========",
-    "======== Resolving type reference directive 'alpha', containing file '/node_modules/foo/index.d.ts', root directory 'C:\\github\\TypeScript'. ========",
-    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
-    "File 'C:\\github\\TypeScript/types/alpha/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/types/alpha/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
-    "File 'C:\\github\\TypeScript/node_modules/alpha/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/alpha/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
-    "File 'C:\\github\\TypeScript/node_modules/@types/alpha/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/@types/alpha/index.d.ts' does not exist.",
+    "======== Type reference directive 'bar' was successfully resolved to '/node_modules/bar/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'alpha', containing file '/node_modules/foo/index.d.ts', root directory '/'. ========",
+    "Resolving with primary search path '/types/'",
+    "File '/types/alpha/package.json' does not exist.",
+    "File '/types/alpha/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/'",
+    "File '/node_modules/alpha/package.json' does not exist.",
+    "File '/node_modules/alpha/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/@types/'",
+    "File '/node_modules/@types/alpha/package.json' does not exist.",
+    "File '/node_modules/@types/alpha/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/node_modules/foo'",
     "File '/node_modules/foo/node_modules/alpha.ts' does not exist.",
     "File '/node_modules/foo/node_modules/alpha.d.ts' does not exist.",
@@ -70,16 +32,16 @@
     "File '/node_modules/foo/node_modules/alpha/index.ts' does not exist.",
     "File '/node_modules/foo/node_modules/alpha/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'alpha' was successfully resolved to '/node_modules/foo/node_modules/alpha/index.d.ts', primary: false. ========",
-    "======== Resolving type reference directive 'alpha', containing file '/node_modules/bar/index.d.ts', root directory 'C:\\github\\TypeScript'. ========",
-    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
-    "File 'C:\\github\\TypeScript/types/alpha/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/types/alpha/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
-    "File 'C:\\github\\TypeScript/node_modules/alpha/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/alpha/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
-    "File 'C:\\github\\TypeScript/node_modules/@types/alpha/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/@types/alpha/index.d.ts' does not exist.",
+    "======== Resolving type reference directive 'alpha', containing file '/node_modules/bar/index.d.ts', root directory '/'. ========",
+    "Resolving with primary search path '/types/'",
+    "File '/types/alpha/package.json' does not exist.",
+    "File '/types/alpha/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/'",
+    "File '/node_modules/alpha/package.json' does not exist.",
+    "File '/node_modules/alpha/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/@types/'",
+    "File '/node_modules/@types/alpha/package.json' does not exist.",
+    "File '/node_modules/@types/alpha/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/node_modules/bar'",
     "File '/node_modules/bar/node_modules/alpha.ts' does not exist.",
     "File '/node_modules/bar/node_modules/alpha.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-7.trace.json b/tests/baselines/reference/library-reference-7.trace.json
index bed3cb4fe40..9c6b19390d0 100644
--- a/tests/baselines/reference/library-reference-7.trace.json
+++ b/tests/baselines/reference/library-reference-7.trace.json
@@ -1,14 +1,14 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/src/consumer.ts', root directory 'C:\\github\\TypeScript'. ========",
-    "Resolving with primary search path 'C:\\github\\TypeScript/types/'",
-    "File 'C:\\github\\TypeScript/types/jquery/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/types/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/'",
-    "File 'C:\\github\\TypeScript/node_modules/jquery/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path 'C:\\github\\TypeScript/node_modules/@types/'",
-    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/package.json' does not exist.",
-    "File 'C:\\github\\TypeScript/node_modules/@types/jquery/index.d.ts' does not exist.",
+    "======== Resolving type reference directive 'jquery', containing file '/src/consumer.ts', root directory '/'. ========",
+    "Resolving with primary search path '/types/'",
+    "File '/types/jquery/package.json' does not exist.",
+    "File '/types/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/'",
+    "File '/node_modules/jquery/package.json' does not exist.",
+    "File '/node_modules/jquery/index.d.ts' does not exist.",
+    "Resolving with primary search path '/node_modules/@types/'",
+    "File '/node_modules/@types/jquery/package.json' does not exist.",
+    "File '/node_modules/@types/jquery/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/src'",
     "File '/src/node_modules/jquery.ts' does not exist.",
     "File '/src/node_modules/jquery.d.ts' does not exist.",
diff --git a/tests/cases/conformance/references/library-reference-11.ts b/tests/cases/conformance/references/library-reference-11.ts
index 39c8af56543..6708ceb4ab3 100644
--- a/tests/cases/conformance/references/library-reference-11.ts
+++ b/tests/cases/conformance/references/library-reference-11.ts
@@ -1,5 +1,6 @@
 // @noImplicitReferences: true
 // @traceResolution: true
+// @currentDirectory: /
 
 // package.json in a secondary reference can refer to another file
 
diff --git a/tests/cases/conformance/references/library-reference-12.ts b/tests/cases/conformance/references/library-reference-12.ts
index c61d6d916ff..3db7fd3bc6f 100644
--- a/tests/cases/conformance/references/library-reference-12.ts
+++ b/tests/cases/conformance/references/library-reference-12.ts
@@ -1,5 +1,6 @@
 // @noImplicitReferences: true
 // @traceResolution: true
+// @currentDirectory: /
 
 // package.json in a secondary reference can refer to another file
 
diff --git a/tests/cases/conformance/references/library-reference-15.ts b/tests/cases/conformance/references/library-reference-15.ts
index 92c96e74c97..dd2179d1af6 100644
--- a/tests/cases/conformance/references/library-reference-15.ts
+++ b/tests/cases/conformance/references/library-reference-15.ts
@@ -1,6 +1,7 @@
 // @noImplicitReferences: true
 // @traceResolution: true
 // @types: jquery
+// @currentDirectory: /
 
 // @filename: /a/types/jquery/index.d.ts
 declare var $: { foo(): void };
diff --git a/tests/cases/conformance/references/library-reference-5.ts b/tests/cases/conformance/references/library-reference-5.ts
index 4660da00a2a..1fe327a1c69 100644
--- a/tests/cases/conformance/references/library-reference-5.ts
+++ b/tests/cases/conformance/references/library-reference-5.ts
@@ -1,5 +1,6 @@
 // @noImplicitReferences: true
 // @traceResolution: true
+// @currentDirectory: /
 
 // Secondary references may not be duplicated if they disagree in content
 
diff --git a/tests/cases/conformance/references/library-reference-7.ts b/tests/cases/conformance/references/library-reference-7.ts
index e938aef7d3a..a5052415562 100644
--- a/tests/cases/conformance/references/library-reference-7.ts
+++ b/tests/cases/conformance/references/library-reference-7.ts
@@ -1,5 +1,6 @@
 // @noImplicitReferences: true
 // @traceResolution: true
+// @currentDirectory: /
 
 // Secondary references are possible
 

From 0a37c697ed79387c3e528da13a1cb710782537c3 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Wed, 18 May 2016 15:03:10 -0700
Subject: [PATCH 048/332] Lint

---
 src/harness/compilerRunner.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/harness/compilerRunner.ts b/src/harness/compilerRunner.ts
index 1069a1bc97e..d368293bd65 100644
--- a/src/harness/compilerRunner.ts
+++ b/src/harness/compilerRunner.ts
@@ -107,7 +107,7 @@ class CompilerBaselineRunner extends RunnerBase {
                 }
 
                 const output = Harness.Compiler.compileFiles(
-                    toBeCompiled, otherFiles, harnessSettings, /*options*/ tsConfigOptions, /*currentDirectory*/ harnessSettings['currentDirectory']);
+                    toBeCompiled, otherFiles, harnessSettings, /*options*/ tsConfigOptions, /*currentDirectory*/ harnessSettings["currentDirectory"]);
 
                 options = output.options;
                 result = output.result;

From 81ee9687e76c3624ac683d3150f18a5258964683 Mon Sep 17 00:00:00 2001
From: Evan Sebastian <evanlhoini@gmail.com>
Date: Sun, 22 May 2016 21:51:21 +0700
Subject: [PATCH 049/332] Add failing test for #8738

---
 .../es6ExportClauseWithAssignmentInEs5.js     | 20 ++++++++++++++
 ...es6ExportClauseWithAssignmentInEs5.symbols | 20 ++++++++++++++
 .../es6ExportClauseWithAssignmentInEs5.types  | 26 +++++++++++++++++++
 .../es6ExportClauseWithAssignmentInEs5.ts     | 11 ++++++++
 4 files changed, 77 insertions(+)
 create mode 100644 tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js
 create mode 100644 tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.symbols
 create mode 100644 tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.types
 create mode 100644 tests/cases/compiler/es6ExportClauseWithAssignmentInEs5.ts

diff --git a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js
new file mode 100644
index 00000000000..4eeabebd0a9
--- /dev/null
+++ b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js
@@ -0,0 +1,20 @@
+//// [server.ts]
+
+var foo = 2;
+foo = 3;
+
+var baz = 3;
+baz = 4;
+
+export { foo, baz, baz as quux };
+
+
+//// [server.js]
+"use strict";
+var foo = 2;
+exports.foo = foo;
+exports.foo = foo = 3;
+var baz = 3;
+exports.baz = baz;
+exports.quux = baz;
+exports.quux = exports.baz = baz = 4;
diff --git a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.symbols b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.symbols
new file mode 100644
index 00000000000..64a41c93cc6
--- /dev/null
+++ b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.symbols
@@ -0,0 +1,20 @@
+=== tests/cases/compiler/server.ts ===
+
+var foo = 2;
+>foo : Symbol(foo, Decl(server.ts, 1, 3))
+
+foo = 3;
+>foo : Symbol(foo, Decl(server.ts, 1, 3))
+
+var baz = 3;
+>baz : Symbol(baz, Decl(server.ts, 4, 3))
+
+baz = 4;
+>baz : Symbol(baz, Decl(server.ts, 4, 3))
+
+export { foo, baz, baz as quux };
+>foo : Symbol(foo, Decl(server.ts, 7, 8))
+>baz : Symbol(baz, Decl(server.ts, 7, 13))
+>baz : Symbol(quux, Decl(server.ts, 7, 18))
+>quux : Symbol(quux, Decl(server.ts, 7, 18))
+
diff --git a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.types b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.types
new file mode 100644
index 00000000000..28ce1a1562e
--- /dev/null
+++ b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.types
@@ -0,0 +1,26 @@
+=== tests/cases/compiler/server.ts ===
+
+var foo = 2;
+>foo : number
+>2 : number
+
+foo = 3;
+>foo = 3 : number
+>foo : number
+>3 : number
+
+var baz = 3;
+>baz : number
+>3 : number
+
+baz = 4;
+>baz = 4 : number
+>baz : number
+>4 : number
+
+export { foo, baz, baz as quux };
+>foo : number
+>baz : number
+>baz : number
+>quux : number
+
diff --git a/tests/cases/compiler/es6ExportClauseWithAssignmentInEs5.ts b/tests/cases/compiler/es6ExportClauseWithAssignmentInEs5.ts
new file mode 100644
index 00000000000..b79e34e3de1
--- /dev/null
+++ b/tests/cases/compiler/es6ExportClauseWithAssignmentInEs5.ts
@@ -0,0 +1,11 @@
+// @target: es5
+// @module: commonjs
+
+// @filename: server.ts
+var foo = 2;
+foo = 3;
+
+var baz = 3;
+baz = 4;
+
+export { foo, baz, baz as quux };

From 63291d1de0a22de6160cb650d6d25d74304deab1 Mon Sep 17 00:00:00 2001
From: Evan Sebastian <evanlhoini@gmail.com>
Date: Sun, 22 May 2016 22:23:41 +0700
Subject: [PATCH 050/332] Sort baseline reference identifier by name

---
 tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js
index 4eeabebd0a9..636b4ff0909 100644
--- a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js
+++ b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js
@@ -17,4 +17,4 @@ exports.foo = foo = 3;
 var baz = 3;
 exports.baz = baz;
 exports.quux = baz;
-exports.quux = exports.baz = baz = 4;
+exports.baz = exports.quux = baz = 4;

From 9a4b6ab6262c2fd3c0c9d0765861bb7c8a828dde Mon Sep 17 00:00:00 2001
From: Evan Sebastian <evanlhoini@gmail.com>
Date: Sun, 22 May 2016 22:24:31 +0700
Subject: [PATCH 051/332] Detects assignment to internal module export clause,
 fixes #8738

---
 src/compiler/emitter.ts | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index f27557a9136..2ff6ca97bfc 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -2613,6 +2613,14 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                 return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, /*isExported*/ true);
             }
 
+            function isNameOfExportedSourceLevelDeclarationInClauseModule(node: Node): boolean {
+                if (modulekind === ModuleKind.System || node.kind !== SyntaxKind.Identifier || nodeIsSynthesized(node)) {
+                    return false;
+                }
+
+                return !exportEquals && exportSpecifiers && hasProperty(exportSpecifiers, (<Identifier>node).text);
+            }
+
             function emitPrefixUnaryExpression(node: PrefixUnaryExpression) {
                 const exportChanged = (node.operator === SyntaxKind.PlusPlusToken || node.operator === SyntaxKind.MinusMinusToken) &&
                     isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
@@ -2783,18 +2791,34 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                     emitDestructuring(node, node.parent.kind === SyntaxKind.ExpressionStatement);
                 }
                 else {
-                    const exportChanged =
+                    const externalExportChanged =
                         node.operatorToken.kind >= SyntaxKind.FirstAssignment &&
                         node.operatorToken.kind <= SyntaxKind.LastAssignment &&
                         isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left);
 
-                    if (exportChanged) {
+                    if (externalExportChanged) {
                         // emit assignment 'x <op> y' as 'exports("x", x <op> y)'
                         write(`${exportFunctionForFile}("`);
                         emitNodeWithoutSourceMap(node.left);
                         write(`", `);
                     }
 
+                    const internalExportClauseMemberChanged =
+                        node.operatorToken.kind >= SyntaxKind.FirstAssignment &&
+                        node.operatorToken.kind <= SyntaxKind.LastAssignment &&
+                        isNameOfExportedSourceLevelDeclarationInClauseModule(node.left);
+
+                    if (internalExportClauseMemberChanged) {
+                        for (const specifier of exportSpecifiers[(<Identifier>node.left).text]) {
+                            emitStart(specifier.name);
+                            emitContainingModuleName(specifier);
+                            write(".");
+                            emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                            emitEnd(specifier.name);
+                            write(" = ");
+                        }
+                    }
+
                     if (node.operatorToken.kind === SyntaxKind.AsteriskAsteriskToken || node.operatorToken.kind === SyntaxKind.AsteriskAsteriskEqualsToken) {
                         // Downleveled emit exponentiation operator using Math.pow
                         emitExponentiationOperator(node);
@@ -2815,7 +2839,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                         decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator);
                     }
 
-                    if (exportChanged) {
+                    if (externalExportChanged) {
                         write(")");
                     }
                 }

From 4e415ebfd003ce23c0e44032a7ad548369a045fc Mon Sep 17 00:00:00 2001
From: Yuichi Nukiyama <oscar.wilde84@hotmail.co.jp>
Date: Tue, 24 May 2016 00:41:44 +0900
Subject: [PATCH 052/332] add SharedArrayBuffer

fix
---
 Jakefile.js                                   |  5 ++-
 src/compiler/commandLineParser.ts             |  3 +-
 src/lib/es2017.d.ts                           |  3 +-
 src/lib/es2017.sharedmemory.d.ts              | 27 +++++++++++++
 ...ousTypeNotReferencingTypeParameter.symbols |  4 +-
 ...ymousTypeNotReferencingTypeParameter.types |  4 +-
 .../reference/useSharedArrayBuffer1.js        | 10 +++++
 .../reference/useSharedArrayBuffer1.symbols   | 18 +++++++++
 .../reference/useSharedArrayBuffer1.types     | 23 +++++++++++
 .../useSharedArrayBuffer2.errors.txt          | 10 +++++
 .../reference/useSharedArrayBuffer2.js        | 10 +++++
 .../useSharedArrayBuffer3.errors.txt          | 10 +++++
 .../reference/useSharedArrayBuffer3.js        | 10 +++++
 .../reference/useSharedArrayBuffer4.js        | 14 +++++++
 .../reference/useSharedArrayBuffer4.symbols   | 32 +++++++++++++++
 .../reference/useSharedArrayBuffer4.types     | 39 +++++++++++++++++++
 .../reference/useSharedArrayBuffer5.js        | 10 +++++
 .../reference/useSharedArrayBuffer5.symbols   | 20 ++++++++++
 .../reference/useSharedArrayBuffer5.types     | 24 ++++++++++++
 .../reference/useSharedArrayBuffer6.js        | 10 +++++
 .../reference/useSharedArrayBuffer6.symbols   | 20 ++++++++++
 .../reference/useSharedArrayBuffer6.types     | 24 ++++++++++++
 .../es2017/useSharedArrayBuffer1.ts           |  6 +++
 .../es2017/useSharedArrayBuffer2.ts           |  6 +++
 .../es2017/useSharedArrayBuffer3.ts           |  5 +++
 .../es2017/useSharedArrayBuffer4.ts           |  8 ++++
 .../es2017/useSharedArrayBuffer5.ts           |  6 +++
 .../es2017/useSharedArrayBuffer6.ts           |  6 +++
 tests/cases/unittests/commandLineParsing.ts   |  8 ++--
 .../convertCompilerOptionsFromJson.ts         |  8 ++--
 30 files changed, 368 insertions(+), 15 deletions(-)
 create mode 100644 src/lib/es2017.sharedmemory.d.ts
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer1.js
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer1.symbols
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer1.types
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer2.errors.txt
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer2.js
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer3.errors.txt
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer3.js
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer4.js
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer4.symbols
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer4.types
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer5.js
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer5.symbols
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer5.types
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer6.js
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer6.symbols
 create mode 100644 tests/baselines/reference/useSharedArrayBuffer6.types
 create mode 100644 tests/cases/conformance/es2017/useSharedArrayBuffer1.ts
 create mode 100644 tests/cases/conformance/es2017/useSharedArrayBuffer2.ts
 create mode 100644 tests/cases/conformance/es2017/useSharedArrayBuffer3.ts
 create mode 100644 tests/cases/conformance/es2017/useSharedArrayBuffer4.ts
 create mode 100644 tests/cases/conformance/es2017/useSharedArrayBuffer5.ts
 create mode 100644 tests/cases/conformance/es2017/useSharedArrayBuffer6.ts

diff --git a/Jakefile.js b/Jakefile.js
index cc28ec9af85..2dfdfa846a9 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -187,7 +187,10 @@ var es2016LibrarySourceMap = es2016LibrarySource.map(function (source) {
     return { target: "lib." + source, sources: ["header.d.ts", source] };
 });
 
-var es2017LibrarySource = ["es2017.object.d.ts"];
+var es2017LibrarySource = [
+    "es2017.object.d.ts",
+    "es2017.sharedmemory.d.ts"
+];
 
 var es2017LibrarySourceMap = es2017LibrarySource.map(function (source) {
     return { target: "lib." + source, sources: ["header.d.ts", source] };
diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index a8d955d3b16..d12e2f59d35 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -391,7 +391,8 @@ namespace ts {
                     "es2015.symbol": "lib.es2015.symbol.d.ts",
                     "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
                     "es2016.array.include": "lib.es2016.array.include.d.ts",
-                    "es2017.object": "lib.es2017.object.d.ts"
+                    "es2017.object": "lib.es2017.object.d.ts",
+                    "es2017.sharedmemory": "lib.es2017.sharedmemory.d.ts"
                 },
             },
             description: Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
diff --git a/src/lib/es2017.d.ts b/src/lib/es2017.d.ts
index aad5ff4d2ce..13f9d93f444 100644
--- a/src/lib/es2017.d.ts
+++ b/src/lib/es2017.d.ts
@@ -1,2 +1,3 @@
 /// <reference path="lib.es2016.d.ts" />
-/// <reference path="lib.es2017.object.d.ts" />
\ No newline at end of file
+/// <reference path="lib.es2017.object.d.ts" />
+/// <reference path="lib.es2017.sharedmemory.d.ts" />
\ No newline at end of file
diff --git a/src/lib/es2017.sharedmemory.d.ts b/src/lib/es2017.sharedmemory.d.ts
new file mode 100644
index 00000000000..440b74ff016
--- /dev/null
+++ b/src/lib/es2017.sharedmemory.d.ts
@@ -0,0 +1,27 @@
+/// <reference path="lib.es2015.symbol.d.ts" />
+/// <reference path="lib.es2015.symbol.wellknown.d.ts" />
+
+interface SharedArrayBuffer {
+    /**
+      * Read-only. The length of the ArrayBuffer (in bytes).
+      */
+    readonly byteLength: number;
+
+    /*
+     * The SharedArrayBuffer constructor's length property whose value is 1.
+     */
+    length: number;
+    /**
+      * Returns a section of an SharedArrayBuffer.
+      */ 
+    slice(begin:number, end?:number): SharedArrayBuffer;
+    readonly [Symbol.species]: SharedArrayBuffer;
+    readonly [Symbol.toStringTag]: "SharedArrayBuffer";
+}
+
+interface SharedArrayBufferConstructor {
+    readonly prototype: SharedArrayBuffer;
+    new (byteLength: number): SharedArrayBuffer;
+}
+
+declare var SharedArrayBuffer: SharedArrayBufferConstructor;
\ No newline at end of file
diff --git a/tests/baselines/reference/staticAnonymousTypeNotReferencingTypeParameter.symbols b/tests/baselines/reference/staticAnonymousTypeNotReferencingTypeParameter.symbols
index a6aa91e3a56..2596959de9e 100644
--- a/tests/baselines/reference/staticAnonymousTypeNotReferencingTypeParameter.symbols
+++ b/tests/baselines/reference/staticAnonymousTypeNotReferencingTypeParameter.symbols
@@ -562,9 +562,9 @@ class ListWrapper {
 >ListWrapper : Symbol(ListWrapper, Decl(staticAnonymousTypeNotReferencingTypeParameter.ts, 38, 1))
 >l : Symbol(l, Decl(staticAnonymousTypeNotReferencingTypeParameter.ts, 113, 43))
 >T : Symbol(T, Decl(staticAnonymousTypeNotReferencingTypeParameter.ts, 113, 16))
->JSON.stringify : Symbol(JSON.stringify, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>JSON.stringify : Symbol(JSON.stringify, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
 >JSON : Symbol(JSON, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
->stringify : Symbol(JSON.stringify, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>stringify : Symbol(JSON.stringify, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
 >l : Symbol(l, Decl(staticAnonymousTypeNotReferencingTypeParameter.ts, 113, 43))
 
   static maximum<T>(dit: typeof ListWrapper, list: T[], predicate: (t: T) => number): T {
diff --git a/tests/baselines/reference/staticAnonymousTypeNotReferencingTypeParameter.types b/tests/baselines/reference/staticAnonymousTypeNotReferencingTypeParameter.types
index 90148bdbb19..8d35f32707a 100644
--- a/tests/baselines/reference/staticAnonymousTypeNotReferencingTypeParameter.types
+++ b/tests/baselines/reference/staticAnonymousTypeNotReferencingTypeParameter.types
@@ -662,9 +662,9 @@ class ListWrapper {
 >l : T[]
 >T : T
 >JSON.stringify(l) : string
->JSON.stringify : { (value: any): string; (value: any, replacer: (key: string, value: any) => any): string; (value: any, replacer: any[]): string; (value: any, replacer: (key: string, value: any) => any, space: string | number): string; (value: any, replacer: any[], space: string | number): string; }
+>JSON.stringify : { (value: any, replacer?: (key: string, value: any) => any, space?: string | number): string; (value: any, replacer?: (number | string)[], space?: string | number): string; }
 >JSON : JSON
->stringify : { (value: any): string; (value: any, replacer: (key: string, value: any) => any): string; (value: any, replacer: any[]): string; (value: any, replacer: (key: string, value: any) => any, space: string | number): string; (value: any, replacer: any[], space: string | number): string; }
+>stringify : { (value: any, replacer?: (key: string, value: any) => any, space?: string | number): string; (value: any, replacer?: (number | string)[], space?: string | number): string; }
 >l : T[]
 
   static maximum<T>(dit: typeof ListWrapper, list: T[], predicate: (t: T) => number): T {
diff --git a/tests/baselines/reference/useSharedArrayBuffer1.js b/tests/baselines/reference/useSharedArrayBuffer1.js
new file mode 100644
index 00000000000..d607095f115
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer1.js
@@ -0,0 +1,10 @@
+//// [useSharedArrayBuffer1.ts]
+
+var foge = new SharedArrayBuffer(1024);
+var bar = foge.slice(1, 10);
+var len = foge.byteLength;
+
+//// [useSharedArrayBuffer1.js]
+var foge = new SharedArrayBuffer(1024);
+var bar = foge.slice(1, 10);
+var len = foge.byteLength;
diff --git a/tests/baselines/reference/useSharedArrayBuffer1.symbols b/tests/baselines/reference/useSharedArrayBuffer1.symbols
new file mode 100644
index 00000000000..cc5a9a5e199
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer1.symbols
@@ -0,0 +1,18 @@
+=== tests/cases/conformance/es2017/useSharedArrayBuffer1.ts ===
+
+var foge = new SharedArrayBuffer(1024);
+>foge : Symbol(foge, Decl(useSharedArrayBuffer1.ts, 1, 3))
+>SharedArrayBuffer : Symbol(SharedArrayBuffer, Decl(lib.es2017.sharedmemory.d.ts, --, --), Decl(lib.es2017.sharedmemory.d.ts, --, --))
+
+var bar = foge.slice(1, 10);
+>bar : Symbol(bar, Decl(useSharedArrayBuffer1.ts, 2, 3))
+>foge.slice : Symbol(SharedArrayBuffer.slice, Decl(lib.es2017.sharedmemory.d.ts, --, --))
+>foge : Symbol(foge, Decl(useSharedArrayBuffer1.ts, 1, 3))
+>slice : Symbol(SharedArrayBuffer.slice, Decl(lib.es2017.sharedmemory.d.ts, --, --))
+
+var len = foge.byteLength;
+>len : Symbol(len, Decl(useSharedArrayBuffer1.ts, 3, 3))
+>foge.byteLength : Symbol(SharedArrayBuffer.byteLength, Decl(lib.es2017.sharedmemory.d.ts, --, --))
+>foge : Symbol(foge, Decl(useSharedArrayBuffer1.ts, 1, 3))
+>byteLength : Symbol(SharedArrayBuffer.byteLength, Decl(lib.es2017.sharedmemory.d.ts, --, --))
+
diff --git a/tests/baselines/reference/useSharedArrayBuffer1.types b/tests/baselines/reference/useSharedArrayBuffer1.types
new file mode 100644
index 00000000000..95ef3df11de
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer1.types
@@ -0,0 +1,23 @@
+=== tests/cases/conformance/es2017/useSharedArrayBuffer1.ts ===
+
+var foge = new SharedArrayBuffer(1024);
+>foge : SharedArrayBuffer
+>new SharedArrayBuffer(1024) : SharedArrayBuffer
+>SharedArrayBuffer : SharedArrayBufferConstructor
+>1024 : number
+
+var bar = foge.slice(1, 10);
+>bar : SharedArrayBuffer
+>foge.slice(1, 10) : SharedArrayBuffer
+>foge.slice : (begin: number, end?: number) => SharedArrayBuffer
+>foge : SharedArrayBuffer
+>slice : (begin: number, end?: number) => SharedArrayBuffer
+>1 : number
+>10 : number
+
+var len = foge.byteLength;
+>len : number
+>foge.byteLength : number
+>foge : SharedArrayBuffer
+>byteLength : number
+
diff --git a/tests/baselines/reference/useSharedArrayBuffer2.errors.txt b/tests/baselines/reference/useSharedArrayBuffer2.errors.txt
new file mode 100644
index 00000000000..c5eb85dcbba
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer2.errors.txt
@@ -0,0 +1,10 @@
+tests/cases/conformance/es2017/useSharedArrayBuffer2.ts(2,16): error TS2304: Cannot find name 'SharedArrayBuffer'.
+
+
+==== tests/cases/conformance/es2017/useSharedArrayBuffer2.ts (1 errors) ====
+    
+    var foge = new SharedArrayBuffer(1024);
+                   ~~~~~~~~~~~~~~~~~
+!!! error TS2304: Cannot find name 'SharedArrayBuffer'.
+    var bar = foge.slice(1, 10);
+    var len = foge.byteLength;
\ No newline at end of file
diff --git a/tests/baselines/reference/useSharedArrayBuffer2.js b/tests/baselines/reference/useSharedArrayBuffer2.js
new file mode 100644
index 00000000000..ed67d837c79
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer2.js
@@ -0,0 +1,10 @@
+//// [useSharedArrayBuffer2.ts]
+
+var foge = new SharedArrayBuffer(1024);
+var bar = foge.slice(1, 10);
+var len = foge.byteLength;
+
+//// [useSharedArrayBuffer2.js]
+var foge = new SharedArrayBuffer(1024);
+var bar = foge.slice(1, 10);
+var len = foge.byteLength;
diff --git a/tests/baselines/reference/useSharedArrayBuffer3.errors.txt b/tests/baselines/reference/useSharedArrayBuffer3.errors.txt
new file mode 100644
index 00000000000..868bfe5a584
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer3.errors.txt
@@ -0,0 +1,10 @@
+tests/cases/conformance/es2017/useSharedArrayBuffer3.ts(2,16): error TS2304: Cannot find name 'SharedArrayBuffer'.
+
+
+==== tests/cases/conformance/es2017/useSharedArrayBuffer3.ts (1 errors) ====
+    
+    var foge = new SharedArrayBuffer(1024);
+                   ~~~~~~~~~~~~~~~~~
+!!! error TS2304: Cannot find name 'SharedArrayBuffer'.
+    var bar = foge.slice(1, 10);
+    var len = foge.byteLength;
\ No newline at end of file
diff --git a/tests/baselines/reference/useSharedArrayBuffer3.js b/tests/baselines/reference/useSharedArrayBuffer3.js
new file mode 100644
index 00000000000..b6e65e3bd66
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer3.js
@@ -0,0 +1,10 @@
+//// [useSharedArrayBuffer3.ts]
+
+var foge = new SharedArrayBuffer(1024);
+var bar = foge.slice(1, 10);
+var len = foge.byteLength;
+
+//// [useSharedArrayBuffer3.js]
+var foge = new SharedArrayBuffer(1024);
+var bar = foge.slice(1, 10);
+var len = foge.byteLength;
diff --git a/tests/baselines/reference/useSharedArrayBuffer4.js b/tests/baselines/reference/useSharedArrayBuffer4.js
new file mode 100644
index 00000000000..3bdc2bdd2e7
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer4.js
@@ -0,0 +1,14 @@
+//// [useSharedArrayBuffer4.ts]
+
+var foge = new SharedArrayBuffer(1024);
+var bar = foge.slice(1, 10);
+var species = foge[Symbol.species];
+var stringTag = foge[Symbol.toStringTag];
+var len = foge.byteLength;
+
+//// [useSharedArrayBuffer4.js]
+var foge = new SharedArrayBuffer(1024);
+var bar = foge.slice(1, 10);
+var species = foge[Symbol.species];
+var stringTag = foge[Symbol.toStringTag];
+var len = foge.byteLength;
diff --git a/tests/baselines/reference/useSharedArrayBuffer4.symbols b/tests/baselines/reference/useSharedArrayBuffer4.symbols
new file mode 100644
index 00000000000..7a8a2a167aa
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer4.symbols
@@ -0,0 +1,32 @@
+=== tests/cases/conformance/es2017/useSharedArrayBuffer4.ts ===
+
+var foge = new SharedArrayBuffer(1024);
+>foge : Symbol(foge, Decl(useSharedArrayBuffer4.ts, 1, 3))
+>SharedArrayBuffer : Symbol(SharedArrayBuffer, Decl(lib.es2017.sharedmemory.d.ts, --, --), Decl(lib.es2017.sharedmemory.d.ts, --, --))
+
+var bar = foge.slice(1, 10);
+>bar : Symbol(bar, Decl(useSharedArrayBuffer4.ts, 2, 3))
+>foge.slice : Symbol(SharedArrayBuffer.slice, Decl(lib.es2017.sharedmemory.d.ts, --, --))
+>foge : Symbol(foge, Decl(useSharedArrayBuffer4.ts, 1, 3))
+>slice : Symbol(SharedArrayBuffer.slice, Decl(lib.es2017.sharedmemory.d.ts, --, --))
+
+var species = foge[Symbol.species];
+>species : Symbol(species, Decl(useSharedArrayBuffer4.ts, 3, 3))
+>foge : Symbol(foge, Decl(useSharedArrayBuffer4.ts, 1, 3))
+>Symbol.species : Symbol(SymbolConstructor.species, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+>Symbol : Symbol(Symbol, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --))
+>species : Symbol(SymbolConstructor.species, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+
+var stringTag = foge[Symbol.toStringTag];
+>stringTag : Symbol(stringTag, Decl(useSharedArrayBuffer4.ts, 4, 3))
+>foge : Symbol(foge, Decl(useSharedArrayBuffer4.ts, 1, 3))
+>Symbol.toStringTag : Symbol(SymbolConstructor.toStringTag, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+>Symbol : Symbol(Symbol, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --))
+>toStringTag : Symbol(SymbolConstructor.toStringTag, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+
+var len = foge.byteLength;
+>len : Symbol(len, Decl(useSharedArrayBuffer4.ts, 5, 3))
+>foge.byteLength : Symbol(SharedArrayBuffer.byteLength, Decl(lib.es2017.sharedmemory.d.ts, --, --))
+>foge : Symbol(foge, Decl(useSharedArrayBuffer4.ts, 1, 3))
+>byteLength : Symbol(SharedArrayBuffer.byteLength, Decl(lib.es2017.sharedmemory.d.ts, --, --))
+
diff --git a/tests/baselines/reference/useSharedArrayBuffer4.types b/tests/baselines/reference/useSharedArrayBuffer4.types
new file mode 100644
index 00000000000..e182cd654aa
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer4.types
@@ -0,0 +1,39 @@
+=== tests/cases/conformance/es2017/useSharedArrayBuffer4.ts ===
+
+var foge = new SharedArrayBuffer(1024);
+>foge : SharedArrayBuffer
+>new SharedArrayBuffer(1024) : SharedArrayBuffer
+>SharedArrayBuffer : SharedArrayBufferConstructor
+>1024 : number
+
+var bar = foge.slice(1, 10);
+>bar : SharedArrayBuffer
+>foge.slice(1, 10) : SharedArrayBuffer
+>foge.slice : (begin: number, end?: number) => SharedArrayBuffer
+>foge : SharedArrayBuffer
+>slice : (begin: number, end?: number) => SharedArrayBuffer
+>1 : number
+>10 : number
+
+var species = foge[Symbol.species];
+>species : SharedArrayBuffer
+>foge[Symbol.species] : SharedArrayBuffer
+>foge : SharedArrayBuffer
+>Symbol.species : symbol
+>Symbol : SymbolConstructor
+>species : symbol
+
+var stringTag = foge[Symbol.toStringTag];
+>stringTag : "SharedArrayBuffer"
+>foge[Symbol.toStringTag] : "SharedArrayBuffer"
+>foge : SharedArrayBuffer
+>Symbol.toStringTag : symbol
+>Symbol : SymbolConstructor
+>toStringTag : symbol
+
+var len = foge.byteLength;
+>len : number
+>foge.byteLength : number
+>foge : SharedArrayBuffer
+>byteLength : number
+
diff --git a/tests/baselines/reference/useSharedArrayBuffer5.js b/tests/baselines/reference/useSharedArrayBuffer5.js
new file mode 100644
index 00000000000..df8da8850d3
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer5.js
@@ -0,0 +1,10 @@
+//// [useSharedArrayBuffer5.ts]
+
+var foge = new SharedArrayBuffer(1024);
+var species = foge[Symbol.species];
+var stringTag = foge[Symbol.toStringTag];
+
+//// [useSharedArrayBuffer5.js]
+var foge = new SharedArrayBuffer(1024);
+var species = foge[Symbol.species];
+var stringTag = foge[Symbol.toStringTag];
diff --git a/tests/baselines/reference/useSharedArrayBuffer5.symbols b/tests/baselines/reference/useSharedArrayBuffer5.symbols
new file mode 100644
index 00000000000..a6eab16ac6a
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer5.symbols
@@ -0,0 +1,20 @@
+=== tests/cases/conformance/es2017/useSharedArrayBuffer5.ts ===
+
+var foge = new SharedArrayBuffer(1024);
+>foge : Symbol(foge, Decl(useSharedArrayBuffer5.ts, 1, 3))
+>SharedArrayBuffer : Symbol(SharedArrayBuffer, Decl(lib.es2017.sharedmemory.d.ts, --, --), Decl(lib.es2017.sharedmemory.d.ts, --, --))
+
+var species = foge[Symbol.species];
+>species : Symbol(species, Decl(useSharedArrayBuffer5.ts, 2, 3))
+>foge : Symbol(foge, Decl(useSharedArrayBuffer5.ts, 1, 3))
+>Symbol.species : Symbol(SymbolConstructor.species, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+>Symbol : Symbol(Symbol, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --))
+>species : Symbol(SymbolConstructor.species, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+
+var stringTag = foge[Symbol.toStringTag];
+>stringTag : Symbol(stringTag, Decl(useSharedArrayBuffer5.ts, 3, 3))
+>foge : Symbol(foge, Decl(useSharedArrayBuffer5.ts, 1, 3))
+>Symbol.toStringTag : Symbol(SymbolConstructor.toStringTag, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+>Symbol : Symbol(Symbol, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --))
+>toStringTag : Symbol(SymbolConstructor.toStringTag, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+
diff --git a/tests/baselines/reference/useSharedArrayBuffer5.types b/tests/baselines/reference/useSharedArrayBuffer5.types
new file mode 100644
index 00000000000..9e7627a503b
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer5.types
@@ -0,0 +1,24 @@
+=== tests/cases/conformance/es2017/useSharedArrayBuffer5.ts ===
+
+var foge = new SharedArrayBuffer(1024);
+>foge : SharedArrayBuffer
+>new SharedArrayBuffer(1024) : SharedArrayBuffer
+>SharedArrayBuffer : SharedArrayBufferConstructor
+>1024 : number
+
+var species = foge[Symbol.species];
+>species : SharedArrayBuffer
+>foge[Symbol.species] : SharedArrayBuffer
+>foge : SharedArrayBuffer
+>Symbol.species : symbol
+>Symbol : SymbolConstructor
+>species : symbol
+
+var stringTag = foge[Symbol.toStringTag];
+>stringTag : "SharedArrayBuffer"
+>foge[Symbol.toStringTag] : "SharedArrayBuffer"
+>foge : SharedArrayBuffer
+>Symbol.toStringTag : symbol
+>Symbol : SymbolConstructor
+>toStringTag : symbol
+
diff --git a/tests/baselines/reference/useSharedArrayBuffer6.js b/tests/baselines/reference/useSharedArrayBuffer6.js
new file mode 100644
index 00000000000..598bc46217e
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer6.js
@@ -0,0 +1,10 @@
+//// [useSharedArrayBuffer6.ts]
+
+var foge = new SharedArrayBuffer(1024);
+var species = foge[Symbol.species];
+var stringTag = foge[Symbol.toStringTag];
+
+//// [useSharedArrayBuffer6.js]
+var foge = new SharedArrayBuffer(1024);
+var species = foge[Symbol.species];
+var stringTag = foge[Symbol.toStringTag];
diff --git a/tests/baselines/reference/useSharedArrayBuffer6.symbols b/tests/baselines/reference/useSharedArrayBuffer6.symbols
new file mode 100644
index 00000000000..afdbac86cd6
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer6.symbols
@@ -0,0 +1,20 @@
+=== tests/cases/conformance/es2017/useSharedArrayBuffer6.ts ===
+
+var foge = new SharedArrayBuffer(1024);
+>foge : Symbol(foge, Decl(useSharedArrayBuffer6.ts, 1, 3))
+>SharedArrayBuffer : Symbol(SharedArrayBuffer, Decl(lib.es2017.sharedmemory.d.ts, --, --), Decl(lib.es2017.sharedmemory.d.ts, --, --))
+
+var species = foge[Symbol.species];
+>species : Symbol(species, Decl(useSharedArrayBuffer6.ts, 2, 3))
+>foge : Symbol(foge, Decl(useSharedArrayBuffer6.ts, 1, 3))
+>Symbol.species : Symbol(SymbolConstructor.species, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+>Symbol : Symbol(Symbol, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --))
+>species : Symbol(SymbolConstructor.species, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+
+var stringTag = foge[Symbol.toStringTag];
+>stringTag : Symbol(stringTag, Decl(useSharedArrayBuffer6.ts, 3, 3))
+>foge : Symbol(foge, Decl(useSharedArrayBuffer6.ts, 1, 3))
+>Symbol.toStringTag : Symbol(SymbolConstructor.toStringTag, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+>Symbol : Symbol(Symbol, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --))
+>toStringTag : Symbol(SymbolConstructor.toStringTag, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+
diff --git a/tests/baselines/reference/useSharedArrayBuffer6.types b/tests/baselines/reference/useSharedArrayBuffer6.types
new file mode 100644
index 00000000000..45439b9331e
--- /dev/null
+++ b/tests/baselines/reference/useSharedArrayBuffer6.types
@@ -0,0 +1,24 @@
+=== tests/cases/conformance/es2017/useSharedArrayBuffer6.ts ===
+
+var foge = new SharedArrayBuffer(1024);
+>foge : SharedArrayBuffer
+>new SharedArrayBuffer(1024) : SharedArrayBuffer
+>SharedArrayBuffer : SharedArrayBufferConstructor
+>1024 : number
+
+var species = foge[Symbol.species];
+>species : SharedArrayBuffer
+>foge[Symbol.species] : SharedArrayBuffer
+>foge : SharedArrayBuffer
+>Symbol.species : symbol
+>Symbol : SymbolConstructor
+>species : symbol
+
+var stringTag = foge[Symbol.toStringTag];
+>stringTag : "SharedArrayBuffer"
+>foge[Symbol.toStringTag] : "SharedArrayBuffer"
+>foge : SharedArrayBuffer
+>Symbol.toStringTag : symbol
+>Symbol : SymbolConstructor
+>toStringTag : symbol
+
diff --git a/tests/cases/conformance/es2017/useSharedArrayBuffer1.ts b/tests/cases/conformance/es2017/useSharedArrayBuffer1.ts
new file mode 100644
index 00000000000..78d8c23f98a
--- /dev/null
+++ b/tests/cases/conformance/es2017/useSharedArrayBuffer1.ts
@@ -0,0 +1,6 @@
+// @target: es5
+// @lib: es5,es2017.sharedmemory
+
+var foge = new SharedArrayBuffer(1024);
+var bar = foge.slice(1, 10);
+var len = foge.byteLength;
\ No newline at end of file
diff --git a/tests/cases/conformance/es2017/useSharedArrayBuffer2.ts b/tests/cases/conformance/es2017/useSharedArrayBuffer2.ts
new file mode 100644
index 00000000000..68d7702fa2a
--- /dev/null
+++ b/tests/cases/conformance/es2017/useSharedArrayBuffer2.ts
@@ -0,0 +1,6 @@
+// @target: es5
+// @lib: es5
+
+var foge = new SharedArrayBuffer(1024);
+var bar = foge.slice(1, 10);
+var len = foge.byteLength;
\ No newline at end of file
diff --git a/tests/cases/conformance/es2017/useSharedArrayBuffer3.ts b/tests/cases/conformance/es2017/useSharedArrayBuffer3.ts
new file mode 100644
index 00000000000..62b3b3a21a9
--- /dev/null
+++ b/tests/cases/conformance/es2017/useSharedArrayBuffer3.ts
@@ -0,0 +1,5 @@
+// @target: es6
+
+var foge = new SharedArrayBuffer(1024);
+var bar = foge.slice(1, 10);
+var len = foge.byteLength;
\ No newline at end of file
diff --git a/tests/cases/conformance/es2017/useSharedArrayBuffer4.ts b/tests/cases/conformance/es2017/useSharedArrayBuffer4.ts
new file mode 100644
index 00000000000..4d47c739ff3
--- /dev/null
+++ b/tests/cases/conformance/es2017/useSharedArrayBuffer4.ts
@@ -0,0 +1,8 @@
+// @target: es6
+// @lib: es2017
+
+var foge = new SharedArrayBuffer(1024);
+var bar = foge.slice(1, 10);
+var species = foge[Symbol.species];
+var stringTag = foge[Symbol.toStringTag];
+var len = foge.byteLength;
\ No newline at end of file
diff --git a/tests/cases/conformance/es2017/useSharedArrayBuffer5.ts b/tests/cases/conformance/es2017/useSharedArrayBuffer5.ts
new file mode 100644
index 00000000000..3606c1c6346
--- /dev/null
+++ b/tests/cases/conformance/es2017/useSharedArrayBuffer5.ts
@@ -0,0 +1,6 @@
+// @target: es5
+// @lib: es6,es2017.sharedmemory
+
+var foge = new SharedArrayBuffer(1024);
+var species = foge[Symbol.species];
+var stringTag = foge[Symbol.toStringTag];
\ No newline at end of file
diff --git a/tests/cases/conformance/es2017/useSharedArrayBuffer6.ts b/tests/cases/conformance/es2017/useSharedArrayBuffer6.ts
new file mode 100644
index 00000000000..3606c1c6346
--- /dev/null
+++ b/tests/cases/conformance/es2017/useSharedArrayBuffer6.ts
@@ -0,0 +1,6 @@
+// @target: es5
+// @lib: es6,es2017.sharedmemory
+
+var foge = new SharedArrayBuffer(1024);
+var species = foge[Symbol.species];
+var stringTag = foge[Symbol.toStringTag];
\ No newline at end of file
diff --git a/tests/cases/unittests/commandLineParsing.ts b/tests/cases/unittests/commandLineParsing.ts
index c59f6a4d78c..fadd3fb61b0 100644
--- a/tests/cases/unittests/commandLineParsing.ts
+++ b/tests/cases/unittests/commandLineParsing.ts
@@ -60,7 +60,7 @@ namespace ts {
             assertParseResult(["--lib", "es5,invalidOption", "0.ts"],
                 {
                     errors: [{
-                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object'",
+                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory'",
                         category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category,
                         code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
 
@@ -217,7 +217,7 @@ namespace ts {
                         start: undefined,
                         length: undefined,
                     }, {
-                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object'",
+                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory'",
                         category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category,
                         code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
 
@@ -237,7 +237,7 @@ namespace ts {
             assertParseResult(["--lib", "es5,", "es7", "0.ts"],
                 {
                     errors: [{
-                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object'",
+                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory'",
                         category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category,
                         code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
 
@@ -257,7 +257,7 @@ namespace ts {
             assertParseResult(["--lib", "es5, ", "es7", "0.ts"],
                 {
                     errors: [{
-                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object'",
+                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory'",
                         category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category,
                         code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
 
diff --git a/tests/cases/unittests/convertCompilerOptionsFromJson.ts b/tests/cases/unittests/convertCompilerOptionsFromJson.ts
index b48d4ac451b..84c9ed49a9e 100644
--- a/tests/cases/unittests/convertCompilerOptionsFromJson.ts
+++ b/tests/cases/unittests/convertCompilerOptionsFromJson.ts
@@ -233,7 +233,7 @@ namespace ts {
                         file: undefined,
                         start: 0,
                         length: 0,
-                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object'",
+                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory'",
                         code: Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
                         category: Diagnostics.Argument_for_0_option_must_be_Colon_1.category
                     }]
@@ -264,7 +264,7 @@ namespace ts {
                         file: undefined,
                         start: 0,
                         length: 0,
-                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object'",
+                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory'",
                         code: Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
                         category: Diagnostics.Argument_for_0_option_must_be_Colon_1.category
                     }]
@@ -295,7 +295,7 @@ namespace ts {
                         file: undefined,
                         start: 0,
                         length: 0,
-                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object'",
+                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory'",
                         code: Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
                         category: Diagnostics.Argument_for_0_option_must_be_Colon_1.category
                     }]
@@ -326,7 +326,7 @@ namespace ts {
                         file: undefined,
                         start: 0,
                         length: 0,
-                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object'",
+                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory'",
                         code: Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
                         category: Diagnostics.Argument_for_0_option_must_be_Colon_1.category
                     }]

From 269ebda7fc11d07c8305628e31d69dbe5c0aa2e0 Mon Sep 17 00:00:00 2001
From: Evan Sebastian <evanlhoini@gmail.com>
Date: Tue, 24 May 2016 04:21:43 +0700
Subject: [PATCH 053/332] Factor out assignment op check

---
 src/compiler/emitter.ts | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index 2ff6ca97bfc..06ed0b18d34 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -2791,9 +2791,9 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                     emitDestructuring(node, node.parent.kind === SyntaxKind.ExpressionStatement);
                 }
                 else {
-                    const externalExportChanged =
-                        node.operatorToken.kind >= SyntaxKind.FirstAssignment &&
-                        node.operatorToken.kind <= SyntaxKind.LastAssignment &&
+                    const isAssignment = isAssignmentOperator(node.operatorToken.kind);
+
+                    const externalExportChanged = isAssignment &&
                         isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left);
 
                     if (externalExportChanged) {
@@ -2803,9 +2803,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                         write(`", `);
                     }
 
-                    const internalExportClauseMemberChanged =
-                        node.operatorToken.kind >= SyntaxKind.FirstAssignment &&
-                        node.operatorToken.kind <= SyntaxKind.LastAssignment &&
+                    const internalExportClauseMemberChanged = isAssignment &&
                         isNameOfExportedSourceLevelDeclarationInClauseModule(node.left);
 
                     if (internalExportClauseMemberChanged) {

From ec60ac94ab5ebb619a6fc59ba96ad933459ea0b5 Mon Sep 17 00:00:00 2001
From: Evan Sebastian <evanlhoini@gmail.com>
Date: Tue, 24 May 2016 04:24:38 +0700
Subject: [PATCH 054/332] Add test for composite assignment

---
 .../es6ExportClauseWithAssignmentInEs5.js       |  8 +++++++-
 .../es6ExportClauseWithAssignmentInEs5.symbols  | 17 ++++++++++++-----
 .../es6ExportClauseWithAssignmentInEs5.types    | 12 +++++++++++-
 .../es6ExportClauseWithAssignmentInEs5.ts       |  5 ++++-
 4 files changed, 34 insertions(+), 8 deletions(-)

diff --git a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js
index 636b4ff0909..9387f508999 100644
--- a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js
+++ b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js
@@ -6,7 +6,10 @@ foo = 3;
 var baz = 3;
 baz = 4;
 
-export { foo, baz, baz as quux };
+var buzz = 10;
+buzz += 3;
+
+export { foo, baz, baz as quux, buzz };
 
 
 //// [server.js]
@@ -18,3 +21,6 @@ var baz = 3;
 exports.baz = baz;
 exports.quux = baz;
 exports.baz = exports.quux = baz = 4;
+var buzz = 10;
+exports.buzz = buzz;
+exports.buzz = buzz += 3;
diff --git a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.symbols b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.symbols
index 64a41c93cc6..489636a5d7b 100644
--- a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.symbols
+++ b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.symbols
@@ -12,9 +12,16 @@ var baz = 3;
 baz = 4;
 >baz : Symbol(baz, Decl(server.ts, 4, 3))
 
-export { foo, baz, baz as quux };
->foo : Symbol(foo, Decl(server.ts, 7, 8))
->baz : Symbol(baz, Decl(server.ts, 7, 13))
->baz : Symbol(quux, Decl(server.ts, 7, 18))
->quux : Symbol(quux, Decl(server.ts, 7, 18))
+var buzz = 10;
+>buzz : Symbol(buzz, Decl(server.ts, 7, 3))
+
+buzz += 3;
+>buzz : Symbol(buzz, Decl(server.ts, 7, 3))
+
+export { foo, baz, baz as quux, buzz };
+>foo : Symbol(foo, Decl(server.ts, 10, 8))
+>baz : Symbol(baz, Decl(server.ts, 10, 13))
+>baz : Symbol(quux, Decl(server.ts, 10, 18))
+>quux : Symbol(quux, Decl(server.ts, 10, 18))
+>buzz : Symbol(buzz, Decl(server.ts, 10, 31))
 
diff --git a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.types b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.types
index 28ce1a1562e..98e8b5528c0 100644
--- a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.types
+++ b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.types
@@ -18,9 +18,19 @@ baz = 4;
 >baz : number
 >4 : number
 
-export { foo, baz, baz as quux };
+var buzz = 10;
+>buzz : number
+>10 : number
+
+buzz += 3;
+>buzz += 3 : number
+>buzz : number
+>3 : number
+
+export { foo, baz, baz as quux, buzz };
 >foo : number
 >baz : number
 >baz : number
 >quux : number
+>buzz : number
 
diff --git a/tests/cases/compiler/es6ExportClauseWithAssignmentInEs5.ts b/tests/cases/compiler/es6ExportClauseWithAssignmentInEs5.ts
index b79e34e3de1..e61660f886e 100644
--- a/tests/cases/compiler/es6ExportClauseWithAssignmentInEs5.ts
+++ b/tests/cases/compiler/es6ExportClauseWithAssignmentInEs5.ts
@@ -8,4 +8,7 @@ foo = 3;
 var baz = 3;
 baz = 4;
 
-export { foo, baz, baz as quux };
+var buzz = 10;
+buzz += 3;
+
+export { foo, baz, baz as quux, buzz };

From 1c253239e673695d54aa96dd991350e63cccf03e Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Mon, 23 May 2016 14:51:39 -0700
Subject: [PATCH 055/332] Refactor

---
 src/compiler/program.ts | 31 ++++++++++++++++++-------------
 1 file changed, 18 insertions(+), 13 deletions(-)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 5ada898acb6..d1b6f2b3ffd 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -972,6 +972,23 @@ namespace ts {
         return resolutions;
     }
 
+    export function getDefaultTypeDirectiveNames(options: CompilerOptions, rootFiles: string[], host: CompilerHost): string[] {
+        // Use explicit type list from tsconfig.json
+        if (options.types) {
+            return options.types;
+        }
+
+        // or load all types from the automatic type import fields
+        if (host && host.getDefaultTypeDirectiveNames) {
+            const commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), host.getCanonicalFileName);
+            if (commonRoot) {
+                return host.getDefaultTypeDirectiveNames(commonRoot);
+            }
+        }
+        
+        return undefined;
+    }
+
     export function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program {
         let program: Program;
         let files: SourceFile[] = [];
@@ -1022,19 +1039,7 @@ namespace ts {
             forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false));
 
             // load type declarations specified via 'types' argument
-            let typeReferences: string[];
-            if (options.types) {
-                typeReferences = options.types;
-            }
-            else {
-                // or load all types from the automatic type import fields
-                if (host.getDefaultTypeDirectiveNames) {
-                    const commonRoot = getCommonSourceDirectory();
-                    if (commonRoot) {
-                        typeReferences = host.getDefaultTypeDirectiveNames(commonRoot);
-                    }
-                }
-            }
+            let typeReferences: string[] = getDefaultTypeDirectiveNames(options, rootNames, host);
 
             if (typeReferences) {
                 const resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, /*containingFile*/ undefined);

From ebd4ce6e7adf5ab0265d32eb8d37c7c25ed5d388 Mon Sep 17 00:00:00 2001
From: Evan Sebastian <evanlhoini@gmail.com>
Date: Tue, 24 May 2016 04:51:46 +0700
Subject: [PATCH 056/332] Factor out the behaviour and handles x++ and ++x

---
 src/compiler/emitter.ts                       | 57 ++++++++++++++-----
 .../es6ExportClauseWithAssignmentInEs5.js     | 12 +++-
 ...es6ExportClauseWithAssignmentInEs5.symbols | 25 ++++++--
 .../es6ExportClauseWithAssignmentInEs5.types  | 19 ++++++-
 .../es6ExportClauseWithAssignmentInEs5.ts     |  7 ++-
 5 files changed, 96 insertions(+), 24 deletions(-)

diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index 06ed0b18d34..010fc2f2266 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -2622,10 +2622,12 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
             }
 
             function emitPrefixUnaryExpression(node: PrefixUnaryExpression) {
-                const exportChanged = (node.operator === SyntaxKind.PlusPlusToken || node.operator === SyntaxKind.MinusMinusToken) &&
+                const isPlusPlusOrMinusMinus = (node.operator === SyntaxKind.PlusPlusToken
+                    || node.operator === SyntaxKind.MinusMinusToken);
+                const externalExportChanged = isPlusPlusOrMinusMinus &&
                     isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
 
-                if (exportChanged) {
+                if (externalExportChanged) {
                     // emit
                     // ++x
                     // as
@@ -2634,6 +2636,12 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                     emitNodeWithoutSourceMap(node.operand);
                     write(`", `);
                 }
+                const internalExportChanged = isPlusPlusOrMinusMinus &&
+                    isNameOfExportedSourceLevelDeclarationInClauseModule(node.operand);
+
+                if (internalExportChanged) {
+                    emitAliasEqual(<Identifier> node.operand);
+                }
 
                 write(tokenToString(node.operator));
                 // In some cases, we need to emit a space between the operator and the operand. One obvious case
@@ -2659,14 +2667,16 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                 }
                 emit(node.operand);
 
-                if (exportChanged) {
+                if (externalExportChanged) {
                     write(")");
                 }
             }
 
             function emitPostfixUnaryExpression(node: PostfixUnaryExpression) {
-                const exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
-                if (exportChanged) {
+                const externalExportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
+                const internalExportChanged = isNameOfExportedSourceLevelDeclarationInClauseModule(node.operand);
+
+                if (externalExportChanged) {
                     // export function returns the value that was passes as the second argument
                     // however for postfix unary expressions result value should be the value before modification.
                     // emit 'x++' as '(export('x', ++x) - 1)' and 'x--' as '(export('x', --x) + 1)'
@@ -2684,6 +2694,16 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                         write(") + 1)");
                     }
                 }
+                else if (internalExportChanged) {
+                    emitAliasEqual(<Identifier> node.operand);
+                    emit(node.operand);
+                    if (node.operator === SyntaxKind.PlusPlusToken) {
+                        write(" += 1");
+                    }
+                    else {
+                        write(" -= 1");
+                    }
+                }
                 else {
                     emit(node.operand);
                     write(tokenToString(node.operator));
@@ -2785,6 +2805,18 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                 }
             }
 
+            function emitAliasEqual(name: Identifier): boolean {
+                for (const specifier of exportSpecifiers[name.text]) {
+                    emitStart(specifier.name);
+                    emitContainingModuleName(specifier);
+                    write(".");
+                    emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                    emitEnd(specifier.name);
+                    write(" = ");
+                }
+                return true;
+            }
+
             function emitBinaryExpression(node: BinaryExpression) {
                 if (languageVersion < ScriptTarget.ES6 && node.operatorToken.kind === SyntaxKind.EqualsToken &&
                     (node.left.kind === SyntaxKind.ObjectLiteralExpression || node.left.kind === SyntaxKind.ArrayLiteralExpression)) {
@@ -2803,18 +2835,13 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                         write(`", `);
                     }
 
-                    const internalExportClauseMemberChanged = isAssignment &&
+                    const internalExportChanged = isAssignment &&
                         isNameOfExportedSourceLevelDeclarationInClauseModule(node.left);
 
-                    if (internalExportClauseMemberChanged) {
-                        for (const specifier of exportSpecifiers[(<Identifier>node.left).text]) {
-                            emitStart(specifier.name);
-                            emitContainingModuleName(specifier);
-                            write(".");
-                            emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                            emitEnd(specifier.name);
-                            write(" = ");
-                        }
+                    if (internalExportChanged) {
+                        // export { foo }
+                        // emit foo = 2 as exports.foo = foo = 2
+                        emitAliasEqual(<Identifier>node.left);
                     }
 
                     if (node.operatorToken.kind === SyntaxKind.AsteriskAsteriskToken || node.operatorToken.kind === SyntaxKind.AsteriskAsteriskEqualsToken) {
diff --git a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js
index 9387f508999..94bc5d9281f 100644
--- a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js
+++ b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.js
@@ -9,7 +9,12 @@ baz = 4;
 var buzz = 10;
 buzz += 3;
 
-export { foo, baz, baz as quux, buzz };
+var bizz = 8;
+bizz++; // compiles to exports.bizz = bizz += 1
+bizz--; // similarly
+++bizz; // compiles to exports.bizz = ++bizz
+
+export { foo, baz, baz as quux, buzz, bizz };
 
 
 //// [server.js]
@@ -24,3 +29,8 @@ exports.baz = exports.quux = baz = 4;
 var buzz = 10;
 exports.buzz = buzz;
 exports.buzz = buzz += 3;
+var bizz = 8;
+exports.bizz = bizz;
+exports.bizz = bizz += 1; // compiles to exports.bizz = bizz += 1
+exports.bizz = bizz -= 1; // similarly
+exports.bizz = ++bizz; // compiles to exports.bizz = ++bizz
diff --git a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.symbols b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.symbols
index 489636a5d7b..6f8dbb01ec5 100644
--- a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.symbols
+++ b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.symbols
@@ -18,10 +18,23 @@ var buzz = 10;
 buzz += 3;
 >buzz : Symbol(buzz, Decl(server.ts, 7, 3))
 
-export { foo, baz, baz as quux, buzz };
->foo : Symbol(foo, Decl(server.ts, 10, 8))
->baz : Symbol(baz, Decl(server.ts, 10, 13))
->baz : Symbol(quux, Decl(server.ts, 10, 18))
->quux : Symbol(quux, Decl(server.ts, 10, 18))
->buzz : Symbol(buzz, Decl(server.ts, 10, 31))
+var bizz = 8;
+>bizz : Symbol(bizz, Decl(server.ts, 10, 3))
+
+bizz++; // compiles to exports.bizz = bizz += 1
+>bizz : Symbol(bizz, Decl(server.ts, 10, 3))
+
+bizz--; // similarly
+>bizz : Symbol(bizz, Decl(server.ts, 10, 3))
+
+++bizz; // compiles to exports.bizz = ++bizz
+>bizz : Symbol(bizz, Decl(server.ts, 10, 3))
+
+export { foo, baz, baz as quux, buzz, bizz };
+>foo : Symbol(foo, Decl(server.ts, 15, 8))
+>baz : Symbol(baz, Decl(server.ts, 15, 13))
+>baz : Symbol(quux, Decl(server.ts, 15, 18))
+>quux : Symbol(quux, Decl(server.ts, 15, 18))
+>buzz : Symbol(buzz, Decl(server.ts, 15, 31))
+>bizz : Symbol(bizz, Decl(server.ts, 15, 37))
 
diff --git a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.types b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.types
index 98e8b5528c0..3b6752d89db 100644
--- a/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.types
+++ b/tests/baselines/reference/es6ExportClauseWithAssignmentInEs5.types
@@ -27,10 +27,27 @@ buzz += 3;
 >buzz : number
 >3 : number
 
-export { foo, baz, baz as quux, buzz };
+var bizz = 8;
+>bizz : number
+>8 : number
+
+bizz++; // compiles to exports.bizz = bizz += 1
+>bizz++ : number
+>bizz : number
+
+bizz--; // similarly
+>bizz-- : number
+>bizz : number
+
+++bizz; // compiles to exports.bizz = ++bizz
+>++bizz : number
+>bizz : number
+
+export { foo, baz, baz as quux, buzz, bizz };
 >foo : number
 >baz : number
 >baz : number
 >quux : number
 >buzz : number
+>bizz : number
 
diff --git a/tests/cases/compiler/es6ExportClauseWithAssignmentInEs5.ts b/tests/cases/compiler/es6ExportClauseWithAssignmentInEs5.ts
index e61660f886e..2e86ba7aeea 100644
--- a/tests/cases/compiler/es6ExportClauseWithAssignmentInEs5.ts
+++ b/tests/cases/compiler/es6ExportClauseWithAssignmentInEs5.ts
@@ -11,4 +11,9 @@ baz = 4;
 var buzz = 10;
 buzz += 3;
 
-export { foo, baz, baz as quux, buzz };
+var bizz = 8;
+bizz++; // compiles to exports.bizz = bizz += 1
+bizz--; // similarly
+++bizz; // compiles to exports.bizz = ++bizz
+
+export { foo, baz, baz as quux, buzz, bizz };

From cd97270721b9d5fddde74980526218dc97ad81e0 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Mon, 23 May 2016 15:11:03 -0700
Subject: [PATCH 057/332] Add test case

---
 ...peParameterExplicitlyExtendsAny.errors.txt | 34 ++++++++++----
 .../typeParameterExplicitlyExtendsAny.js      | 44 +++++++++++++++++--
 .../typeParameterExplicitlyExtendsAny.ts      | 25 ++++++++++-
 3 files changed, 89 insertions(+), 14 deletions(-)

diff --git a/tests/baselines/reference/typeParameterExplicitlyExtendsAny.errors.txt b/tests/baselines/reference/typeParameterExplicitlyExtendsAny.errors.txt
index 24f40e967da..27d1738fcbc 100644
--- a/tests/baselines/reference/typeParameterExplicitlyExtendsAny.errors.txt
+++ b/tests/baselines/reference/typeParameterExplicitlyExtendsAny.errors.txt
@@ -1,9 +1,7 @@
 tests/cases/compiler/typeParameterExplicitlyExtendsAny.ts(3,7): error TS2339: Property 'blah' does not exist on type 'T'.
-tests/cases/compiler/typeParameterExplicitlyExtendsAny.ts(9,7): error TS2339: Property 'blah' does not exist on type 'T'.
-tests/cases/compiler/typeParameterExplicitlyExtendsAny.ts(10,7): error TS2339: Property 'toString' does not exist on type 'T'.
 
 
-==== tests/cases/compiler/typeParameterExplicitlyExtendsAny.ts (3 errors) ====
+==== tests/cases/compiler/typeParameterExplicitlyExtendsAny.ts (1 errors) ====
     function fee<T>() {
         var t: T;
         t.blah; // Error
@@ -14,10 +12,28 @@ tests/cases/compiler/typeParameterExplicitlyExtendsAny.ts(10,7): error TS2339: P
     
     function fee2<T extends any>() {
         var t: T;
-        t.blah; // Error
-          ~~~~
-!!! error TS2339: Property 'blah' does not exist on type 'T'.
+        t.blah; // ok
         t.toString; // ok
-          ~~~~~~~~
-!!! error TS2339: Property 'toString' does not exist on type 'T'.
-    }
\ No newline at end of file
+    }
+    
+    function f<T extends any>(x: T) {
+        x.children;
+        x();
+        new x();
+        x[100];
+        x['hello'];
+    }
+    
+    
+    // Generic Tree structure
+    type Tree<T> = T & {
+        children?: Tree<T>[];
+    }
+    
+    class MyClass {
+        public static displayTree1<T extends Tree<any>>(tree: T) {
+            // error "Property 'children' does not exist on type 'T'"
+            tree.children;
+        }
+    }
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/typeParameterExplicitlyExtendsAny.js b/tests/baselines/reference/typeParameterExplicitlyExtendsAny.js
index 5a1775d44ae..3c2ec6c5977 100644
--- a/tests/baselines/reference/typeParameterExplicitlyExtendsAny.js
+++ b/tests/baselines/reference/typeParameterExplicitlyExtendsAny.js
@@ -7,9 +7,31 @@ function fee<T>() {
 
 function fee2<T extends any>() {
     var t: T;
-    t.blah; // Error
+    t.blah; // ok
     t.toString; // ok
-}
+}
+
+function f<T extends any>(x: T) {
+    x.children;
+    x();
+    new x();
+    x[100];
+    x['hello'];
+}
+
+
+// Generic Tree structure
+type Tree<T> = T & {
+    children?: Tree<T>[];
+}
+
+class MyClass {
+    public static displayTree1<T extends Tree<any>>(tree: T) {
+        // error "Property 'children' does not exist on type 'T'"
+        tree.children;
+    }
+}
+
 
 //// [typeParameterExplicitlyExtendsAny.js]
 function fee() {
@@ -19,6 +41,22 @@ function fee() {
 }
 function fee2() {
     var t;
-    t.blah; // Error
+    t.blah; // ok
     t.toString; // ok
 }
+function f(x) {
+    x.children;
+    x();
+    new x();
+    x[100];
+    x['hello'];
+}
+var MyClass = (function () {
+    function MyClass() {
+    }
+    MyClass.displayTree1 = function (tree) {
+        // error "Property 'children' does not exist on type 'T'"
+        tree.children;
+    };
+    return MyClass;
+}());
diff --git a/tests/cases/compiler/typeParameterExplicitlyExtendsAny.ts b/tests/cases/compiler/typeParameterExplicitlyExtendsAny.ts
index f004bf84c5e..1ff14373dcb 100644
--- a/tests/cases/compiler/typeParameterExplicitlyExtendsAny.ts
+++ b/tests/cases/compiler/typeParameterExplicitlyExtendsAny.ts
@@ -6,6 +6,27 @@ function fee<T>() {
 
 function fee2<T extends any>() {
     var t: T;
-    t.blah; // Error
+    t.blah; // ok
     t.toString; // ok
-}
\ No newline at end of file
+}
+
+function f<T extends any>(x: T) {
+    x.children;
+    x();
+    new x();
+    x[100];
+    x['hello'];
+}
+
+
+// Generic Tree structure
+type Tree<T> = T & {
+    children?: Tree<T>[];
+}
+
+class MyClass {
+    public static displayTree1<T extends Tree<any>>(tree: T) {
+        // error "Property 'children' does not exist on type 'T'"
+        tree.children;
+    }
+}

From f1ac06f30d3a6f44f521a8fcec8e1d9241bcaab7 Mon Sep 17 00:00:00 2001
From: Evan Sebastian <evanlhoini@gmail.com>
Date: Tue, 24 May 2016 05:42:11 +0700
Subject: [PATCH 058/332] Handles ES3 default as identifier name

---
 src/compiler/emitter.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index 010fc2f2266..ddf10c912ec 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -2809,6 +2809,9 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                 for (const specifier of exportSpecifiers[name.text]) {
                     emitStart(specifier.name);
                     emitContainingModuleName(specifier);
+                    if (languageVersion === ScriptTarget.ES3 && name.text === "default") {
+                        write('["default"]');
+                    }
                     write(".");
                     emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
                     emitEnd(specifier.name);

From 3ee4a2283fc6265abd6391f4ddd118b20b31662b Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Mon, 23 May 2016 15:47:04 -0700
Subject: [PATCH 059/332] Lint

---
 src/compiler/program.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index d1b6f2b3ffd..c3a79ea58d6 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -985,7 +985,7 @@ namespace ts {
                 return host.getDefaultTypeDirectiveNames(commonRoot);
             }
         }
-        
+
         return undefined;
     }
 
@@ -1039,7 +1039,7 @@ namespace ts {
             forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false));
 
             // load type declarations specified via 'types' argument
-            let typeReferences: string[] = getDefaultTypeDirectiveNames(options, rootNames, host);
+            const typeReferences: string[] = getDefaultTypeDirectiveNames(options, rootNames, host);
 
             if (typeReferences) {
                 const resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, /*containingFile*/ undefined);

From eca94375e38bf00bf6e3b3973db5676a84e116df Mon Sep 17 00:00:00 2001
From: Evan Sebastian <evanlhoini@gmail.com>
Date: Tue, 24 May 2016 05:52:15 +0700
Subject: [PATCH 060/332] Fix missing else statement

---
 src/compiler/emitter.ts | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index ddf10c912ec..e6638102c40 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -2812,8 +2812,10 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                     if (languageVersion === ScriptTarget.ES3 && name.text === "default") {
                         write('["default"]');
                     }
-                    write(".");
-                    emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                    else {
+                        write(".");
+                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                    }
                     emitEnd(specifier.name);
                     write(" = ");
                 }

From f69ecb5b90746ad6e87c6cff8044eb02f7e1b7ca Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Mon, 23 May 2016 16:00:56 -0700
Subject: [PATCH 061/332] run tests in parallel by equally dividing them
 between workers

---
 Jakefile.js                    |  99 +++++++++++++++++--------
 src/harness/compilerRunner.ts  |  12 +++-
 src/harness/fourslashRunner.ts |  12 +++-
 src/harness/projectsRunner.ts  |  12 +++-
 src/harness/runner.ts          | 127 ++++++++++++++++++++++++++++++---
 src/harness/runnerbase.ts      |  11 ++-
 src/harness/rwcRunner.ts       |  10 ++-
 src/harness/test262Runner.ts   |  12 +++-
 8 files changed, 246 insertions(+), 49 deletions(-)

diff --git a/Jakefile.js b/Jakefile.js
index 5112a8db597..73bfdfdaedf 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -680,9 +680,9 @@ function cleanTestDirs() {
 }
 
 // used to pass data from jake command line directly to run.js
-function writeTestConfigFile(tests, light, testConfigFile) {
-    console.log('Running test(s): ' + tests);
-    var testConfigContents = JSON.stringify({ test: [tests], light: light });
+function writeTestConfigFile(tests, light, taskConfigsFolder, workerCount, testConfigFile) {
+    var testConfigContents = JSON.stringify({ test: tests ? [tests] : undefined, light: light, workerCount: workerCount, taskConfigsFolder: taskConfigsFolder });
+    console.log('Running tests with config: ' + testConfigContents);
     fs.writeFileSync('test.config', testConfigContents);
 }
 
@@ -692,7 +692,7 @@ function deleteTemporaryProjectOutput() {
     }
 }
 
-function runConsoleTests(defaultReporter, defaultSubsets) {
+function runConsoleTests(defaultReporter, runInParallel) {
     cleanTestDirs();
     var debug = process.env.debug || process.env.d;
     tests = process.env.test || process.env.tests || process.env.t;
@@ -701,9 +701,22 @@ function runConsoleTests(defaultReporter, defaultSubsets) {
     if(fs.existsSync(testConfigFile)) {
         fs.unlinkSync(testConfigFile);
     }
+    var workerCount, taskConfigsFolder;
+    if (runInParallel) {
+        // generate name to store task configuration files
+        var prefix = os.tmpdir() + "/ts-tests";
+        var i = 1;
+        do {
+            taskConfigsFolder = prefix + i;
+            i++;
+        } while (fs.existsSync(taskConfigsFolder));
+        fs.mkdirSync(taskConfigsFolder);
 
-    if (tests || light) {
-        writeTestConfigFile(tests, light, testConfigFile);
+        workerCount = process.env.workerCount || os.cpus().length;
+    }
+
+    if (tests || light || taskConfigsFolder) {
+        writeTestConfigFile(tests, light, taskConfigsFolder, workerCount, testConfigFile);
     }
 
     if (tests && tests.toLocaleLowerCase() === "rwc") {
@@ -717,45 +730,71 @@ function runConsoleTests(defaultReporter, defaultSubsets) {
 
     // timeout normally isn't necessary but Travis-CI has been timing out on compiler baselines occasionally
     // default timeout is 2sec which really should be enough, but maybe we just need a small amount longer
-    var subsetRegexes;
-    if(defaultSubsets.length === 0) {
-        subsetRegexes = [tests];
-    }
-    else {
-        var subsets = tests ? tests.split("|") : defaultSubsets;
-        subsetRegexes = subsets.map(function (sub) { return "^" + sub + ".*$"; });
-        subsetRegexes.push("^(?!" + subsets.join("|") + ").*$");
-    }
-    subsetRegexes.forEach(function (subsetRegex, i) {
-        tests = subsetRegex ? ' -g "' + subsetRegex + '"' : '';
+    if(!runInParallel) {
+        tests = tests ? ' -g "' + tests + '"' : '';
         var cmd = "mocha" + (debug ? " --debug-brk" : "") + " -R " + reporter + tests + colors + ' -t ' + testTimeout + ' ' + run;
         console.log(cmd);
-        function finish() {
-            deleteTemporaryProjectOutput();
-            complete();
-        }
         exec(cmd, function () {
-            if (lintFlag && i === 0) {
-                var lint = jake.Task['lint'];
-                lint.addListener('complete', function () {
-                    complete();
-                });
-                lint.invoke();
+            if (i === 0) {
+                runLinter();
             }
             finish();
         }, finish);
-    });
+        
+    }
+    else {
+        // run task to load all tests and partition then between workers 
+        var cmd = "mocha " + " -R min " + colors + run;
+        console.log(cmd);
+        exec(cmd, function() {
+            // read all configuration files and spawn a worker for every config
+            var configFiles = fs.readdirSync(taskConfigsFolder);
+            var counter = configFiles.length;
+            // schedule work for chunks
+            configFiles.forEach(function (f) {
+                var configPath = path.join(taskConfigsFolder, f);
+                var workerCmd = "mocha" + " -t " + testTimeout + " -R " + reporter + " " + colors + " " + run + " --config='" + configPath + "'";
+                console.log(workerCmd);
+                exec(workerCmd, finishWorker, finishWorker) 
+            });
+            
+            function finishWorker() {
+                counter--;
+                if (counter === 0) {
+                    // last worker clean everything and runs linter
+                    runLinter();
+                    deleteTemporaryProjectOutput();
+                    jake.rmRf(taskConfigsFolder);
+                }
+                complete();
+            }
+        });
+    }
+    function finish() {
+        deleteTemporaryProjectOutput();
+        complete();
+    }
+    function runLinter() {
+        if (!lintFlag) {
+            return;
+        }
+        var lint = jake.Task['lint'];
+        lint.addListener('complete', function () {
+            complete();
+        });
+        lint.invoke();
+    }
 }
 
 var testTimeout = 20000;
 desc("Runs all the tests in parallel using the built run.js file. Optional arguments are: t[ests]=category1|category2|... d[ebug]=true.");
 task("runtests-parallel", ["build-rules", "tests", builtLocalDirectory], function() {
-    runConsoleTests('min', ['compiler', 'conformance', 'Projects', 'fourslash']);
+    runConsoleTests('min', /*runInParallel*/ true);
 }, {async: true});
 
 desc("Runs the tests using the built run.js file. Optional arguments are: t[ests]=regex r[eporter]=[list|spec|json|<more>] d[ebug]=true color[s]=false lint=true.");
 task("runtests", ["build-rules", "tests", builtLocalDirectory], function() {
-    runConsoleTests('mocha-fivemat-progress-reporter', []);
+    runConsoleTests('mocha-fivemat-progress-reporter', /*runInParallel*/ false);
 }, {async: true});
 
 desc("Generates code coverage data via instanbul");
diff --git a/src/harness/compilerRunner.ts b/src/harness/compilerRunner.ts
index 1ddbd1ea331..fefea00b807 100644
--- a/src/harness/compilerRunner.ts
+++ b/src/harness/compilerRunner.ts
@@ -11,7 +11,7 @@ const enum CompilerTestType {
 
 class CompilerBaselineRunner extends RunnerBase {
     private basePath = "tests/cases";
-    private testSuiteName: string;
+    private testSuiteName: TestRunnerKind;
     private errors: boolean;
     private emit: boolean;
     private decl: boolean;
@@ -40,6 +40,14 @@ class CompilerBaselineRunner extends RunnerBase {
         this.basePath += "/" + this.testSuiteName;
     }
 
+    public kind() {
+        return this.testSuiteName;
+    }
+
+    public enumerateTestFiles() {
+        return this.enumerateFiles(this.basePath, /\.tsx?$/, { recursive: true });
+    }
+
     private makeUnitName(name: string, root: string) {
         return ts.isRootedDiskPath(name) ? name : ts.combinePaths(root, name);
     };
@@ -390,7 +398,7 @@ class CompilerBaselineRunner extends RunnerBase {
 
             // this will set up a series of describe/it blocks to run between the setup and cleanup phases
             if (this.tests.length === 0) {
-                const testFiles = this.enumerateFiles(this.basePath, /\.tsx?$/, { recursive: true });
+                const testFiles = this.enumerateTestFiles();
                 testFiles.forEach(fn => {
                     fn = fn.replace(/\\/g, "/");
                     this.checkTestCodeOutput(fn);
diff --git a/src/harness/fourslashRunner.ts b/src/harness/fourslashRunner.ts
index 386bd9e340c..a6174342acd 100644
--- a/src/harness/fourslashRunner.ts
+++ b/src/harness/fourslashRunner.ts
@@ -12,7 +12,7 @@ const enum FourSlashTestType {
 
 class FourSlashRunner extends RunnerBase {
     protected basePath: string;
-    protected testSuiteName: string;
+    protected testSuiteName: TestRunnerKind;
 
     constructor(private testType: FourSlashTestType) {
         super();
@@ -36,9 +36,17 @@ class FourSlashRunner extends RunnerBase {
         }
     }
 
+    public enumerateTestFiles() {
+        return this.enumerateFiles(this.basePath, /\.ts/i, { recursive: false });
+    }
+
+    public kind() {
+        return this.testSuiteName;
+    }
+
     public initializeTests() {
         if (this.tests.length === 0) {
-            this.tests = this.enumerateFiles(this.basePath, /\.ts/i, { recursive: false });
+            this.tests = this.enumerateTestFiles();
         }
 
         describe(this.testSuiteName + " tests", () => {
diff --git a/src/harness/projectsRunner.ts b/src/harness/projectsRunner.ts
index 9ee4359d8d3..777ef63145d 100644
--- a/src/harness/projectsRunner.ts
+++ b/src/harness/projectsRunner.ts
@@ -37,11 +37,19 @@ interface BatchCompileProjectTestCaseResult extends CompileProjectFilesResult {
 }
 
 class ProjectRunner extends RunnerBase {
+
+    public enumerateTestFiles() {
+        return this.enumerateFiles("tests/cases/project", /\.json$/, { recursive: true });
+    }
+
+    public kind(): TestRunnerKind {
+        return "project";
+    }
+
     public initializeTests() {
         if (this.tests.length === 0) {
-            const testFiles = this.enumerateFiles("tests/cases/project", /\.json$/, { recursive: true });
+            const testFiles = this.enumerateTestFiles();
             testFiles.forEach(fn => {
-                fn = fn.replace(/\\/g, "/");
                 this.runProjectTestCase(fn);
             });
         }
diff --git a/src/harness/runner.ts b/src/harness/runner.ts
index bb3cafea0a8..07723913040 100644
--- a/src/harness/runner.ts
+++ b/src/harness/runner.ts
@@ -33,18 +33,90 @@ function runTests(runners: RunnerBase[]) {
     }
 }
 
-// users can define tests to run in mytest.config that will override cmd line args, otherwise use cmd line args (test.config), otherwise no options
-let mytestconfig = "mytest.config";
-let testconfig = "test.config";
-let testConfigFile =
-    Harness.IO.fileExists(mytestconfig) ? Harness.IO.readFile(mytestconfig) :
-    (Harness.IO.fileExists(testconfig) ? Harness.IO.readFile(testconfig) : "");
+function tryGetConfig(args: string[]) {
+    const prefix = "--config=";
+    const configPath = ts.forEach(args, arg => arg.lastIndexOf(prefix, 0) === 0 && arg.substr(prefix.length));
+    // strip leading and trailing quotes from the path (necessary on Windows since shell does not do it automatically)
+    return configPath && configPath.replace(/(^[\"'])|([\"']$)/g, "");
+}
 
-if (testConfigFile !== "") {
-    const testConfig = JSON.parse(testConfigFile);
+function createRunner(kind: TestRunnerKind): RunnerBase {
+    switch (kind) {
+        case "conformance":
+            return new CompilerBaselineRunner(CompilerTestType.Conformance);
+        case "compiler":
+            return new CompilerBaselineRunner(CompilerTestType.Regressions);
+        case "fourslash":
+            return new FourSlashRunner(FourSlashTestType.Native);
+        case "fourslash-shims":
+            return new FourSlashRunner(FourSlashTestType.Shims);
+        case "fourslash-shims-pp":
+            return new FourSlashRunner(FourSlashTestType.ShimsWithPreprocess);
+        case "fourslash-server":
+            return new FourSlashRunner(FourSlashTestType.Server);
+        case "project":
+            return new ProjectRunner();
+        case "rwc":
+            return new RWCRunner();
+        case "test262":
+            return new Test262BaselineRunner();
+    }
+}
+
+// users can define tests to run in mytest.config that will override cmd line args, otherwise use cmd line args (test.config), otherwise no options
+
+const mytestconfigFileName = "mytest.config";
+const testconfigFileName = "test.config";
+
+const customConfig = tryGetConfig(Harness.IO.args());
+let testConfigContent =
+    customConfig && Harness.IO.fileExists(customConfig)
+        ? Harness.IO.readFile(customConfig)
+        : Harness.IO.fileExists(mytestconfigFileName)
+            ? Harness.IO.readFile(mytestconfigFileName)
+            : Harness.IO.fileExists(testconfigFileName) ? Harness.IO.readFile(testconfigFileName) : "";
+
+let taskConfigsFolder: string;
+let workerCount: number;
+let runUnitTests = true;
+
+interface TestConfig {
+    light?: boolean;
+    taskConfigsFolder?: string;
+    workerCount?: number;
+    tasks?: TaskSet[];
+    test?: string[];
+    runUnitTests?: boolean;
+}
+
+interface TaskSet {
+    runner: TestRunnerKind;
+    files: string[];
+}
+
+if (testConfigContent !== "") {
+    const testConfig = <TestConfig>JSON.parse(testConfigContent);
     if (testConfig.light) {
         Harness.lightMode = true;
     }
+    if (testConfig.taskConfigsFolder) {
+        taskConfigsFolder = testConfig.taskConfigsFolder;
+    }
+    if (testConfig.runUnitTests !== undefined) {
+        runUnitTests = testConfig.runUnitTests;
+    }
+    if (testConfig.workerCount) {
+        workerCount = testConfig.workerCount;
+    }
+    if (testConfig.tasks) {
+        for (const taskSet of testConfig.tasks) {
+            const runner = createRunner(taskSet.runner);
+            for (const file of taskSet.files) {
+                runner.addTest(file);
+            }
+            runners.push(runner);
+        }
+    }
 
     if (testConfig.test && testConfig.test.length > 0) {
         for (const option of testConfig.test) {
@@ -108,4 +180,41 @@ if (runners.length === 0) {
     // runners.push(new GeneratedFourslashRunner());
 }
 
-runTests(runners);
+if (taskConfigsFolder) {
+    // this instance of mocha should only partition work but not run actual tests
+    runUnitTests = false;
+    const workerConfigs: TestConfig[] = [];
+    for (let i = 0; i < workerCount; i++) {
+        // pass light mode settings to workers
+        workerConfigs.push({ light: Harness.lightMode, tasks: [] });
+    }
+
+    for (const runner of runners) {
+        const files = runner.enumerateTestFiles();
+        const chunkSize = Math.floor(files.length / workerCount) + 1; // add extra 1 to prevent missing tests due to rounding
+        for (let i = 0; i < workerCount; i++) {
+            const startPos = i * chunkSize;
+            const len = Math.min(chunkSize, files.length - startPos);
+            if (len !== 0) {
+                workerConfigs[i].tasks.push({
+                    runner: runner.kind(),
+                    files: files.slice(startPos, startPos + len)
+                });
+            }
+        }
+    }
+
+    for (let i = 0; i < workerCount; i++) {
+        const config = workerConfigs[i];
+        // use last worker to run unit tests
+        config.runUnitTests = i === workerCount - 1;
+        Harness.IO.writeFile(ts.combinePaths(taskConfigsFolder, `task-config${i}.json`), JSON.stringify(workerConfigs[i]));
+    }
+}
+else {
+    runTests(runners);
+}
+if (!runUnitTests) {
+    // patch `describe` to skip unit tests
+    describe = <any>describe.skip;
+}
\ No newline at end of file
diff --git a/src/harness/runnerbase.ts b/src/harness/runnerbase.ts
index a114e8c3201..81da0907714 100644
--- a/src/harness/runnerbase.ts
+++ b/src/harness/runnerbase.ts
@@ -1,5 +1,10 @@
 /// <reference path="harness.ts" />
 
+
+type TestRunnerKind = CompilerTestKind | FourslashTestKind | "project" | "rwc" | "test262";
+type CompilerTestKind = "conformance" | "compiler";
+type FourslashTestKind = "fourslash" | "fourslash-shims" | "fourslash-shims-pp" | "fourslash-server";
+
 abstract class RunnerBase {
     constructor() { }
 
@@ -12,9 +17,13 @@ abstract class RunnerBase {
     }
 
     public enumerateFiles(folder: string, regex?: RegExp, options?: { recursive: boolean }): string[] {
-        return Harness.IO.listFiles(Harness.userSpecifiedRoot + folder, regex, { recursive: (options ? options.recursive : false) });
+        return ts.map(Harness.IO.listFiles(Harness.userSpecifiedRoot + folder, regex, { recursive: (options ? options.recursive : false) }), ts.normalizeSlashes);
     }
 
+    abstract kind(): TestRunnerKind;
+
+    abstract enumerateTestFiles(): string[];
+
     /** Setup the runner's tests so that they are ready to be executed by the harness 
      *  The first test should be a describe/it block that sets up the harness's compiler instance appropriately
      */
diff --git a/src/harness/rwcRunner.ts b/src/harness/rwcRunner.ts
index 39231435bf5..ff1623b9051 100644
--- a/src/harness/rwcRunner.ts
+++ b/src/harness/rwcRunner.ts
@@ -223,12 +223,20 @@ namespace RWC {
 class RWCRunner extends RunnerBase {
     private static sourcePath = "internal/cases/rwc/";
 
+    public enumerateTestFiles() {
+        return Harness.IO.listFiles(RWCRunner.sourcePath, /.+\.json$/);
+    }
+
+    public kind(): TestRunnerKind {
+        return "rwc";
+    }
+
     /** Setup the runner's tests so that they are ready to be executed by the harness
      *  The first test should be a describe/it block that sets up the harness's compiler instance appropriately
      */
     public initializeTests(): void {
         // Read in and evaluate the test list
-        const testList = Harness.IO.listFiles(RWCRunner.sourcePath, /.+\.json$/);
+        const testList = this.enumerateTestFiles();
         for (let i = 0; i < testList.length; i++) {
             this.runTest(testList[i]);
         }
diff --git a/src/harness/test262Runner.ts b/src/harness/test262Runner.ts
index cc9957c1fac..a3276cc65b3 100644
--- a/src/harness/test262Runner.ts
+++ b/src/harness/test262Runner.ts
@@ -97,12 +97,20 @@ class Test262BaselineRunner extends RunnerBase {
         });
     }
 
+    public kind(): TestRunnerKind {
+        return "test262";
+    }
+
+    public enumerateTestFiles() {
+        return ts.map(this.enumerateFiles(Test262BaselineRunner.basePath, Test262BaselineRunner.testFileExtensionRegex, { recursive: true }), ts.normalizePath);
+    }
+
     public initializeTests() {
         // this will set up a series of describe/it blocks to run between the setup and cleanup phases
         if (this.tests.length === 0) {
-            const testFiles = this.enumerateFiles(Test262BaselineRunner.basePath, Test262BaselineRunner.testFileExtensionRegex, { recursive: true });
+            const testFiles = this.enumerateTestFiles();
             testFiles.forEach(fn => {
-                this.runTest(ts.normalizePath(fn));
+                this.runTest(fn);
             });
         }
         else {

From bc36f8c5ca3abb9c972053fa92ea089dfdb136d1 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Mon, 23 May 2016 16:04:22 -0700
Subject: [PATCH 062/332] Apparent members for type params constrained by any

---
 src/compiler/checker.ts | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index e80be0bfe45..722c223a842 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -9927,9 +9927,9 @@ namespace ts {
             }
 
             const apparentType = getApparentType(getWidenedType(type));
-            if (apparentType === unknownType) {
-                // handle cases when type is Type parameter with invalid constraint
-                return unknownType;
+            if (apparentType === unknownType || (type.flags & TypeFlags.TypeParameter && isTypeAny(apparentType))) {
+                // handle cases when type is Type parameter with invalid or any constraint
+                return apparentType;
             }
             const prop = getPropertyOfType(apparentType, right.text);
             if (!prop) {
@@ -11120,7 +11120,9 @@ namespace ts {
             // types are provided for the argument expressions, and the result is always of type Any.
             // We exclude union types because we may have a union of function types that happen to have
             // no common signatures.
-            if (isTypeAny(funcType) || (!callSignatures.length && !constructSignatures.length && !(funcType.flags & TypeFlags.Union) && isTypeAssignableTo(funcType, globalFunctionType))) {
+            if (isTypeAny(funcType) ||
+                (isTypeAny(apparentType) && funcType.flags & TypeFlags.TypeParameter) ||
+                (!callSignatures.length && !constructSignatures.length && !(funcType.flags & TypeFlags.Union) && isTypeAssignableTo(funcType, globalFunctionType))) {
                 // The unknownType indicates that an error already occurred (and was reported).  No
                 // need to report another error in this case.
                 if (funcType !== unknownType && node.typeArguments) {

From 2d5f38c2bc7257d7fa82a42fb86e97bdde597072 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Mon, 23 May 2016 16:20:13 -0700
Subject: [PATCH 063/332] Only return dirs from getdirectories

---
 src/compiler/sys.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 6669a6fca24..0c500d5500e 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -411,7 +411,7 @@ namespace ts {
             }
 
             function getDirectories(path: string): string[] {
-                return _fs.readdirSync(path);
+                return filter<string>(_fs.readdirSync(path), p => fileSystemEntryExists(combinePaths(path, p), FileSystemEntryKind.Directory));
             }
 
             function readDirectory(path: string, extension?: string, exclude?: string[]): string[] {

From f7cc05482b783c48d9bc912ae8821d2d38dbe9bd Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Mon, 23 May 2016 16:25:25 -0700
Subject: [PATCH 064/332] Don't lose host 'this'

---
 src/compiler/program.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index c3a79ea58d6..c7dc47b0006 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -980,7 +980,7 @@ namespace ts {
 
         // or load all types from the automatic type import fields
         if (host && host.getDefaultTypeDirectiveNames) {
-            const commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), host.getCanonicalFileName);
+            const commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), f => host.getCanonicalFileName(f));
             if (commonRoot) {
                 return host.getDefaultTypeDirectiveNames(commonRoot);
             }

From 11d51867f2a1f4885af0807d4b0a848c56c70ddf Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Tue, 24 May 2016 05:58:14 -0700
Subject: [PATCH 065/332] Include enums in childItems in navigation bar

---
 src/services/navigationBar.ts                               | 3 +++
 .../navigationBarItemsInsideMethodsAndConstructors.ts       | 6 +++---
 tests/cases/fourslash/navigationBarItemsItems.ts            | 4 ++--
 tests/cases/fourslash/navigationBarItemsSymbols3.ts         | 4 ++--
 tests/cases/fourslash/server/navbar01.ts                    | 4 ++--
 5 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index 2cd93d3856c..cb81c398cb8 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -314,6 +314,9 @@ namespace ts.NavigationBar {
                 case SyntaxKind.IndexSignature:
                     return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
 
+                case SyntaxKind.EnumDeclaration:
+                    return createItem(node, getTextOfNode((<EnumDeclaration>node).name), ts.ScriptElementKind.enumElement);
+
                 case SyntaxKind.EnumMember:
                     return createItem(node, getTextOfNode((<EnumMember>node).name), ts.ScriptElementKind.memberVariableElement);
 
diff --git a/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts b/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
index 22ae359c737..89b05dc6b07 100644
--- a/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
+++ b/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
@@ -9,7 +9,7 @@
 ////        {| "itemName": "LocalInterfaceInConstrcutor", "kind": "interface", "parentName": ""|}interface LocalInterfaceInConstrcutor {
 ////        }
 ////
-////        enum LocalEnumInConstructor {
+////        {| "itemName": "LocalEnumInConstructor", "kind": "enum", "parentName": "constructor"|}enum LocalEnumInConstructor {
 ////            {| "itemName": "LocalEnumMemberInConstructor", "kind": "property", "parentName": "LocalEnumInConstructor"|}LocalEnumMemberInConstructor,
 ////        }
 ////    }
@@ -24,7 +24,7 @@
 ////        {| "itemName": "LocalInterfaceInMethod", "kind": "interface", "parentName": ""|}interface LocalInterfaceInMethod {
 ////        }
 ////
-////        {| "itemName": "LocalEnumInMethod", "kind": "enum", "parentName": ""|}enum LocalEnumInMethod {
+////        {| "itemName": "LocalEnumInMethod", "kind": "enum", "parentName": "method"|}enum LocalEnumInMethod {
 ////            {| "itemName": "LocalEnumMemberInMethod", "kind": "property", "parentName": "LocalEnumInMethod"|}LocalEnumMemberInMethod,
 ////        }
 ////    }
@@ -39,4 +39,4 @@ test.markers().forEach((marker) => {
 });
 
 // no other items
-verify.navigationBarCount(17);
+verify.navigationBarCount(19);
diff --git a/tests/cases/fourslash/navigationBarItemsItems.ts b/tests/cases/fourslash/navigationBarItemsItems.ts
index 10dd8beb8f3..5cae68b1194 100644
--- a/tests/cases/fourslash/navigationBarItemsItems.ts
+++ b/tests/cases/fourslash/navigationBarItemsItems.ts
@@ -32,7 +32,7 @@
 ////        {| "itemName": "getOrigin", "kind": "method", "parentName": "Point" |}private static getOrigin() { return Point.origin;}
 ////    }
 ////
-////    {| "itemName": "Values", "kind": "enum", "parentName": "" |}enum Values {
+////    {| "itemName": "Values", "kind": "enum", "parentName": "Shapes" |}enum Values {
 ////        value1,
 ////        {| "itemName": "value2", "kind": "property", "parentName": "Values" |}value2,
 ////        value3,
@@ -49,4 +49,4 @@ test.markers().forEach((marker) => {
     }
 });
 
-verify.navigationBarCount(23);
+verify.navigationBarCount(24);
diff --git a/tests/cases/fourslash/navigationBarItemsSymbols3.ts b/tests/cases/fourslash/navigationBarItemsSymbols3.ts
index 5677c0b6301..23451588ecd 100644
--- a/tests/cases/fourslash/navigationBarItemsSymbols3.ts
+++ b/tests/cases/fourslash/navigationBarItemsSymbols3.ts
@@ -1,6 +1,6 @@
 /// <reference path="fourslash.ts"/>
 
-////{| "itemName": "E", "kind": "enum", "parentName": "" |}
+////{| "itemName": "E", "kind": "enum", "parentName": "<global>" |}
 ////enum E {
 ////    // No nav bar entry for this
 ////    [Symbol.isRegExp] = 0
@@ -10,4 +10,4 @@ test.markers().forEach(marker => {
     verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
 });
 
-verify.navigationBarCount(test.markers().length);
\ No newline at end of file
+verify.navigationBarCount(3); // <global> and E appearing both toplevel and under <global>
\ No newline at end of file
diff --git a/tests/cases/fourslash/server/navbar01.ts b/tests/cases/fourslash/server/navbar01.ts
index ef6ae650eff..e4e2b699be5 100644
--- a/tests/cases/fourslash/server/navbar01.ts
+++ b/tests/cases/fourslash/server/navbar01.ts
@@ -32,7 +32,7 @@
 ////        {| "itemName": "getOrigin", "kind": "method", "parentName": "Point" |}private static getOrigin() { return Point.origin;}
 ////    }
 ////
-////    {| "itemName": "Values", "kind": "enum", "parentName": "" |}enum Values {
+////    {| "itemName": "Values", "kind": "enum", "parentName": "Shapes" |}enum Values {
 ////        value1,
 ////        {| "itemName": "value2", "kind": "property", "parentName": "Values" |}value2,
 ////        value3,
@@ -49,4 +49,4 @@ test.markers().forEach((marker) => {
     }
 });
 
-verify.navigationBarCount(23);
+verify.navigationBarCount(24);

From 675d176cef2bfed298ab0250398e905ba76ef58a Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Tue, 24 May 2016 09:58:56 -0700
Subject: [PATCH 066/332] Allow duplicate identifiers as long as their
 declarations span multiple blocks

Fixes #8675
---
 src/compiler/checker.ts                       | 114 +++++++++++++++++-
 src/compiler/diagnosticMessages.json          |   4 +
 src/compiler/types.ts                         |   2 +-
 src/compiler/utilities.ts                     |   2 +-
 .../binaryIntegerLiteralError.errors.txt      |  11 +-
 ...turesWithParameterInitializers2.errors.txt |   8 +-
 ...nterfaceMergeConflictingMembers.errors.txt |  24 ++--
 .../classAndInterfaceWithSameName.errors.txt  |  27 -----
 .../classAndInterfaceWithSameName.symbols     |  26 ++++
 .../classAndInterfaceWithSameName.types       |  26 ++++
 ...ssibilityModifiersOnParameters2.errors.txt |  22 +---
 ...constructorParameterProperties2.errors.txt |  19 +--
 ...faceIncompatibleWithBaseIndexer.errors.txt |   8 +-
 .../duplicateClassElements.errors.txt         |  14 +--
 ...duplicateIdentifierComputedName.errors.txt |  11 ++
 .../duplicateIdentifierComputedName.js        |  13 ++
 ...ateIdentifierDifferentModifiers.errors.txt |  37 ++++++
 .../duplicateIdentifierDifferentModifiers.js  |  37 ++++++
 ...cateIdentifierDifferentSpelling.errors.txt |  16 +++
 .../duplicateIdentifierDifferentSpelling.js   |  18 +++
 .../duplicateObjectLiteralProperty.errors.txt |   8 +-
 ...duplicatePropertiesInStrictMode.errors.txt |   5 +-
 .../duplicatePropertyNames.errors.txt         |  14 +--
 .../duplicateStringNamedProperty1.errors.txt  |   4 +-
 .../gettersAndSettersErrors.errors.txt        |  11 +-
 .../interfaceDeclaration1.errors.txt          |   5 +-
 ...ationBindMultipleDefaultExports.errors.txt |   8 +-
 ...CompilationBindStrictModeErrors.errors.txt |   8 +-
 .../lastPropertyInLiteralWins.errors.txt      |   8 +-
 .../reference/memberOverride.errors.txt       |   5 +-
 ...cesWithConflictingPropertyNames.errors.txt |  23 ++--
 ...esWithConflictingPropertyNames2.errors.txt |  62 ----------
 ...facesWithConflictingPropertyNames2.symbols |  88 ++++++++++++++
 ...erfacesWithConflictingPropertyNames2.types |  88 ++++++++++++++
 .../multipleDefaultExports01.errors.txt       |   9 +-
 .../reference/numericClassMembers1.errors.txt |  16 +--
 .../numericNamedPropertyDuplicates.errors.txt |  22 +---
 ...cStringNamedPropertyEquivalence.errors.txt |  27 ++---
 .../reference/objectLiteralErrors.errors.txt  |  56 +--------
 ...tiesErrorFromNotUsingIdentifier.errors.txt |  11 +-
 ...ypeWithDuplicateNumericProperty.errors.txt |  44 +++----
 .../octalIntegerLiteralError.errors.txt       |  11 +-
 .../optionalPropertiesSyntax.errors.txt       |   8 +-
 ...parameterPropertyInConstructor2.errors.txt |   8 +-
 .../reference/parser0_004152.errors.txt       |   8 +-
 .../parserComputedPropertyName5.errors.txt    |   5 +-
 .../propertyNamedPrototype.errors.txt         |  10 --
 .../reference/propertyNamedPrototype.symbols  |  11 ++
 .../reference/propertyNamedPrototype.types    |  11 ++
 .../reference/reassignStaticProp.errors.txt   |   6 +-
 .../staticPrototypeProperty.errors.txt        |   5 +-
 ...ypesInImplementationSignatures2.errors.txt |   5 +-
 .../stringNamedPropertyDuplicates.errors.txt  |  40 +++---
 .../reference/symbolProperty36.errors.txt     |   5 +-
 .../reference/symbolProperty37.errors.txt     |  13 --
 .../reference/symbolProperty37.symbols        |  14 +++
 .../reference/symbolProperty37.types          |  14 +++
 .../reference/symbolProperty38.errors.txt     |  15 ---
 .../reference/symbolProperty38.symbols        |  17 +++
 .../reference/symbolProperty38.types          |  17 +++
 .../reference/symbolProperty44.errors.txt     |   5 +-
 .../duplicateIdentifierComputedName.ts        |   4 +
 .../duplicateIdentifierDifferentModifiers.ts  |  21 ++++
 .../duplicateIdentifierDifferentSpelling.ts   |   6 +
 64 files changed, 732 insertions(+), 488 deletions(-)
 delete mode 100644 tests/baselines/reference/classAndInterfaceWithSameName.errors.txt
 create mode 100644 tests/baselines/reference/classAndInterfaceWithSameName.symbols
 create mode 100644 tests/baselines/reference/classAndInterfaceWithSameName.types
 create mode 100644 tests/baselines/reference/duplicateIdentifierComputedName.errors.txt
 create mode 100644 tests/baselines/reference/duplicateIdentifierComputedName.js
 create mode 100644 tests/baselines/reference/duplicateIdentifierDifferentModifiers.errors.txt
 create mode 100644 tests/baselines/reference/duplicateIdentifierDifferentModifiers.js
 create mode 100644 tests/baselines/reference/duplicateIdentifierDifferentSpelling.errors.txt
 create mode 100644 tests/baselines/reference/duplicateIdentifierDifferentSpelling.js
 delete mode 100644 tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames2.errors.txt
 create mode 100644 tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames2.symbols
 create mode 100644 tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames2.types
 delete mode 100644 tests/baselines/reference/propertyNamedPrototype.errors.txt
 create mode 100644 tests/baselines/reference/propertyNamedPrototype.symbols
 create mode 100644 tests/baselines/reference/propertyNamedPrototype.types
 delete mode 100644 tests/baselines/reference/symbolProperty37.errors.txt
 create mode 100644 tests/baselines/reference/symbolProperty37.symbols
 create mode 100644 tests/baselines/reference/symbolProperty37.types
 delete mode 100644 tests/baselines/reference/symbolProperty38.errors.txt
 create mode 100644 tests/baselines/reference/symbolProperty38.symbols
 create mode 100644 tests/baselines/reference/symbolProperty38.types
 create mode 100644 tests/cases/compiler/duplicateIdentifierComputedName.ts
 create mode 100644 tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts
 create mode 100644 tests/cases/compiler/duplicateIdentifierDifferentSpelling.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 489abd1ae51..95bfc3b6b48 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -12954,6 +12954,82 @@ namespace ts {
             }
         }
 
+        function checkClassForDuplicateDeclarations(node: ClassLikeDeclaration) {
+            const getter = 1, setter = 2, property = getter | setter;
+
+            const instanceNames: Map<number> = {};
+            const staticNames: Map<number> = {};
+            for (const member of node.members) {
+                if (member.kind === SyntaxKind.Constructor) {
+                    for (const param of (member as ConstructorDeclaration).parameters) {
+                        if (isParameterPropertyDeclaration(param)) {
+                            addName(instanceNames, param.name, (param.name as Identifier).text, property);
+                        }
+                    }
+                }
+                else {
+                    const static = forEach(member.modifiers, m => m.kind === SyntaxKind.StaticKeyword);
+                    const names = static ? staticNames : instanceNames;
+
+                    const memberName = member.name && getPropertyNameForPropertyNameNode(member.name);
+                    switch (member.kind) {
+                        case SyntaxKind.GetAccessor:
+                            addName(names, member.name, memberName, getter);
+                            break;
+
+                        case SyntaxKind.SetAccessor:
+                            addName(names, member.name, memberName, setter);
+                            break;
+
+                        case SyntaxKind.PropertyDeclaration:
+                            addName(names, member.name, memberName, property);
+                            break;
+                    }
+                }
+            }
+
+            function addName(names: Map<number>, location: Node, name: string, meaning: number) {
+                if (hasProperty(names, name)) {
+                    const prev = names[name];
+                    if (prev & meaning) {
+                        error(location, Diagnostics.Duplicate_identifier_0, getTextOfNode(location));
+                    }
+                    else {
+                        names[name] = prev | meaning;
+                    }
+                }
+                else {
+                    names[name] = meaning;
+                }
+            }
+        }
+
+        function checkObjectTypeForDuplicateDeclarations(node: TypeLiteralNode | InterfaceDeclaration) {
+            const names: Map<boolean> = {};
+            for (const member of node.members) {
+                if (member.kind == SyntaxKind.PropertySignature) {
+                    let memberName: string;
+                    switch (member.name.kind) {
+                        case SyntaxKind.StringLiteral:
+                        case SyntaxKind.NumericLiteral:
+                        case SyntaxKind.Identifier:
+                            memberName = (member.name as LiteralExpression | Identifier).text;
+                            break;
+                        default:
+                            continue;
+                    }
+
+                    if (hasProperty(names, memberName)) {
+                        error(member.symbol.valueDeclaration.name, Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, Diagnostics.Duplicate_identifier_0, memberName);
+                    }
+                    else {
+                        names[memberName] = true;
+                    }
+                }
+            }
+        }
+
         function checkTypeForDuplicateIndexSignatures(node: Node) {
             if (node.kind === SyntaxKind.InterfaceDeclaration) {
                 const nodeSymbol = getSymbolOfNode(node);
@@ -13238,6 +13314,7 @@ namespace ts {
                 const type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
                 checkIndexConstraints(type);
                 checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
             }
         }
 
@@ -14430,6 +14507,10 @@ namespace ts {
                 if (node.initializer) {
                     checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
                 }
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(symbol.valueDeclaration.name, Diagnostics.All_declarations_of_0_must_have_identical_modifiers, declarationNameToString(node.name));
+                    error(node.name, Diagnostics.All_declarations_of_0_must_have_identical_modifiers, declarationNameToString(node.name));
+                }
             }
             if (node.kind !== SyntaxKind.PropertyDeclaration && node.kind !== SyntaxKind.PropertySignature) {
                 // We know we don't have a binding pattern or computed name here
@@ -14444,6 +14525,21 @@ namespace ts {
             }
         }
 
+        function areDeclarationFlagsIdentical(left: Declaration, right: Declaration) {
+            if (hasQuestionToken(left) !== hasQuestionToken(right)) {
+                return false;
+            }
+
+            const interestingFlags = NodeFlags.Private |
+                NodeFlags.Protected |
+                NodeFlags.Async |
+                NodeFlags.Abstract |
+                NodeFlags.Readonly |
+                NodeFlags.Static;
+
+            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
+        }
+
         function checkVariableDeclaration(node: VariableDeclaration) {
             checkGrammarVariableDeclaration(node);
             return checkVariableLikeDeclaration(node);
@@ -15237,6 +15333,7 @@ namespace ts {
             const typeWithThis = getTypeWithThisArgument(type);
             const staticType = <ObjectType>getTypeOfSymbol(symbol);
             checkTypeParameterListsIdentical(node, symbol);
+            checkClassForDuplicateDeclarations(node);
 
             const baseTypeNode = getClassExtendsHeritageClauseElement(node);
             if (baseTypeNode) {
@@ -15514,6 +15611,7 @@ namespace ts {
                         checkIndexConstraints(type);
                     }
                 }
+                checkObjectTypeForDuplicateDeclarations(node);
             }
             forEach(getInterfaceBaseTypeNodes(node), heritageElement => {
                 if (!isSupportedExpressionWithTypeArguments(heritageElement)) {
@@ -18152,7 +18250,6 @@ namespace ts {
                     name.kind === SyntaxKind.ComputedPropertyName) {
                     // If the name is not a ComputedPropertyName, the grammar checking will skip it
                     checkGrammarComputedPropertyName(<ComputedPropertyName>name);
-                    continue;
                 }
 
                 if (prop.kind === SyntaxKind.ShorthandPropertyAssignment && !inDestructuring && (<ShorthandPropertyAssignment>prop).objectAssignmentInitializer) {
@@ -18198,17 +18295,22 @@ namespace ts {
                     Debug.fail("Unexpected syntax kind:" + prop.kind);
                 }
 
-                if (!hasProperty(seen, (<Identifier>name).text)) {
-                    seen[(<Identifier>name).text] = currentKind;
+                const effectiveName = getPropertyNameForPropertyNameNode(name);
+                if (effectiveName === undefined) {
+                    continue;
+                }
+
+                if (!hasProperty(seen, effectiveName)) {
+                    seen[effectiveName] = currentKind;
                 }
                 else {
-                    const existingKind = seen[(<Identifier>name).text];
+                    const existingKind = seen[effectiveName];
                     if (currentKind === Property && existingKind === Property) {
-                        continue;
+                        grammarErrorOnNode(name, Diagnostics.Duplicate_identifier_0, getTextOfNode(name));
                     }
                     else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
                         if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[(<Identifier>name).text] = currentKind | existingKind;
+                            seen[effectiveName] = currentKind | existingKind;
                         }
                         else {
                             return grammarErrorOnNode(name, Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name);
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 747192d105b..af8dd8ceb69 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -1927,6 +1927,10 @@
         "category": "Error",
         "code": 2686
     },
+    "All declarations of '{0}' must have identical modifiers.": {
+        "category": "Error",
+        "code": 2687
+    },
     "Import declaration '{0}' is using private name '{1}'.": {
         "category": "Error",
         "code": 4000
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 563b4fea7b8..271285415c9 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2025,7 +2025,7 @@ namespace ts {
         BlockScopedVariableExcludes = Value,
 
         ParameterExcludes = Value,
-        PropertyExcludes = Value,
+        PropertyExcludes = None,
         EnumMemberExcludes = Value,
         FunctionExcludes = Value & ~(Function | ValueModule),
         ClassExcludes = (Value | Type) & ~(ValueModule | Interface), // class-interface mergability done in checker.ts
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 193a48109f0..7969389d788 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -1774,7 +1774,7 @@ namespace ts {
     }
 
     export function getPropertyNameForPropertyNameNode(name: DeclarationName): string {
-        if (name.kind === SyntaxKind.Identifier || name.kind === SyntaxKind.StringLiteral || name.kind === SyntaxKind.NumericLiteral) {
+        if (name.kind === SyntaxKind.Identifier || name.kind === SyntaxKind.StringLiteral || name.kind === SyntaxKind.NumericLiteral || name.kind === SyntaxKind.Parameter) {
             return (<Identifier | LiteralExpression>name).text;
         }
         if (name.kind === SyntaxKind.ComputedPropertyName) {
diff --git a/tests/baselines/reference/binaryIntegerLiteralError.errors.txt b/tests/baselines/reference/binaryIntegerLiteralError.errors.txt
index 20358a8406d..df4eafbddc3 100644
--- a/tests/baselines/reference/binaryIntegerLiteralError.errors.txt
+++ b/tests/baselines/reference/binaryIntegerLiteralError.errors.txt
@@ -1,11 +1,8 @@
 tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/binaryIntegerLiteralError.ts(2,17): error TS1005: ',' expected.
 tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/binaryIntegerLiteralError.ts(3,17): error TS1005: ',' expected.
-tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/binaryIntegerLiteralError.ts(6,5): error TS2300: Duplicate identifier '0b11010'.
-tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/binaryIntegerLiteralError.ts(7,5): error TS2300: Duplicate identifier '26'.
-tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/binaryIntegerLiteralError.ts(8,5): error TS2300: Duplicate identifier '"26"'.
 
 
-==== tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/binaryIntegerLiteralError.ts (5 errors) ====
+==== tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/binaryIntegerLiteralError.ts (2 errors) ====
     // error
     var bin1 = 0B1102110;
                     ~~~~
@@ -16,13 +13,7 @@ tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/binaryIntegerLiteralErr
     
     var obj1 = {
         0b11010: "hi",
-        ~~~~~~~
-!!! error TS2300: Duplicate identifier '0b11010'.
         26: "Hello",
-        ~~
-!!! error TS2300: Duplicate identifier '26'.
         "26": "world",
-        ~~~~
-!!! error TS2300: Duplicate identifier '"26"'.
     };
     
\ No newline at end of file
diff --git a/tests/baselines/reference/callSignaturesWithParameterInitializers2.errors.txt b/tests/baselines/reference/callSignaturesWithParameterInitializers2.errors.txt
index 22f8a563e71..6329b0c5403 100644
--- a/tests/baselines/reference/callSignaturesWithParameterInitializers2.errors.txt
+++ b/tests/baselines/reference/callSignaturesWithParameterInitializers2.errors.txt
@@ -1,12 +1,10 @@
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/callSignaturesWithParameterInitializers2.ts(4,14): error TS2371: A parameter initializer is only allowed in a function or constructor implementation.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/callSignaturesWithParameterInitializers2.ts(11,9): error TS2371: A parameter initializer is only allowed in a function or constructor implementation.
-tests/cases/conformance/types/objectTypeLiteral/callSignatures/callSignaturesWithParameterInitializers2.ts(20,5): error TS2300: Duplicate identifier 'foo'.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/callSignaturesWithParameterInitializers2.ts(20,9): error TS2371: A parameter initializer is only allowed in a function or constructor implementation.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/callSignaturesWithParameterInitializers2.ts(20,15): error TS1005: '{' expected.
-tests/cases/conformance/types/objectTypeLiteral/callSignatures/callSignaturesWithParameterInitializers2.ts(21,5): error TS2300: Duplicate identifier 'foo'.
 
 
-==== tests/cases/conformance/types/objectTypeLiteral/callSignatures/callSignaturesWithParameterInitializers2.ts (6 errors) ====
+==== tests/cases/conformance/types/objectTypeLiteral/callSignatures/callSignaturesWithParameterInitializers2.ts (4 errors) ====
     // Optional parameters allow initializers only in implementation signatures
     // All the below declarations are errors
     
@@ -31,15 +29,11 @@ tests/cases/conformance/types/objectTypeLiteral/callSignatures/callSignaturesWit
     
     var b = {
         foo(x = 1), // error
-        ~~~
-!!! error TS2300: Duplicate identifier 'foo'.
             ~~~~~
 !!! error TS2371: A parameter initializer is only allowed in a function or constructor implementation.
                   ~
 !!! error TS1005: '{' expected.
         foo(x = 1) { }, // error
-        ~~~
-!!! error TS2300: Duplicate identifier 'foo'.
     }
     
     b.foo();
diff --git a/tests/baselines/reference/classAndInterfaceMergeConflictingMembers.errors.txt b/tests/baselines/reference/classAndInterfaceMergeConflictingMembers.errors.txt
index 48e52faae1e..a28471a3f91 100644
--- a/tests/baselines/reference/classAndInterfaceMergeConflictingMembers.errors.txt
+++ b/tests/baselines/reference/classAndInterfaceMergeConflictingMembers.errors.txt
@@ -1,44 +1,38 @@
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(2,12): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(6,5): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(10,15): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(14,5): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(18,13): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(22,5): error TS2300: Duplicate identifier 'x'.
+tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(10,15): error TS2686: All declarations of 'x' must have identical modifiers.
+tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(14,5): error TS2686: All declarations of 'x' must have identical modifiers.
+tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(18,13): error TS2686: All declarations of 'x' must have identical modifiers.
+tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(22,5): error TS2686: All declarations of 'x' must have identical modifiers.
 
 
-==== tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts (6 errors) ====
+==== tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts (4 errors) ====
     declare class C1 {
         public x : number;
-               ~
-!!! error TS2300: Duplicate identifier 'x'.
     }
     
     interface C1 {
         x : number;
-        ~
-!!! error TS2300: Duplicate identifier 'x'.
     }
     
     declare class C2 {
         protected x : number;
                   ~
-!!! error TS2300: Duplicate identifier 'x'.
+!!! error TS2686: All declarations of 'x' must have identical modifiers.
     }
     
     interface C2 {
         x : number;
         ~
-!!! error TS2300: Duplicate identifier 'x'.
+!!! error TS2686: All declarations of 'x' must have identical modifiers.
     }
     
     declare class C3 {
         private x : number;
                 ~
-!!! error TS2300: Duplicate identifier 'x'.
+!!! error TS2686: All declarations of 'x' must have identical modifiers.
     }
     
     interface C3 {
         x : number;
         ~
-!!! error TS2300: Duplicate identifier 'x'.
+!!! error TS2686: All declarations of 'x' must have identical modifiers.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/classAndInterfaceWithSameName.errors.txt b/tests/baselines/reference/classAndInterfaceWithSameName.errors.txt
deleted file mode 100644
index f1f26f50f3e..00000000000
--- a/tests/baselines/reference/classAndInterfaceWithSameName.errors.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceWithSameName.ts(1,11): error TS2300: Duplicate identifier 'foo'.
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceWithSameName.ts(2,15): error TS2300: Duplicate identifier 'foo'.
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceWithSameName.ts(6,9): error TS2300: Duplicate identifier 'bar'.
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceWithSameName.ts(10,9): error TS2300: Duplicate identifier 'bar'.
-
-
-==== tests/cases/conformance/classes/classDeclarations/classAndInterfaceWithSameName.ts (4 errors) ====
-    class C { foo: string; }
-              ~~~
-!!! error TS2300: Duplicate identifier 'foo'.
-    interface C { foo: string; }
-                  ~~~
-!!! error TS2300: Duplicate identifier 'foo'.
-    
-    module M {
-        class D {
-            bar: string;
-            ~~~
-!!! error TS2300: Duplicate identifier 'bar'.
-        }
-    
-        interface D {
-            bar: string;
-            ~~~
-!!! error TS2300: Duplicate identifier 'bar'.
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/classAndInterfaceWithSameName.symbols b/tests/baselines/reference/classAndInterfaceWithSameName.symbols
new file mode 100644
index 00000000000..cb9eba3cd6f
--- /dev/null
+++ b/tests/baselines/reference/classAndInterfaceWithSameName.symbols
@@ -0,0 +1,26 @@
+=== tests/cases/conformance/classes/classDeclarations/classAndInterfaceWithSameName.ts ===
+class C { foo: string; }
+>C : Symbol(C, Decl(classAndInterfaceWithSameName.ts, 0, 0), Decl(classAndInterfaceWithSameName.ts, 0, 24))
+>foo : Symbol(C.foo, Decl(classAndInterfaceWithSameName.ts, 0, 9), Decl(classAndInterfaceWithSameName.ts, 1, 13))
+
+interface C { foo: string; }
+>C : Symbol(C, Decl(classAndInterfaceWithSameName.ts, 0, 0), Decl(classAndInterfaceWithSameName.ts, 0, 24))
+>foo : Symbol(C.foo, Decl(classAndInterfaceWithSameName.ts, 0, 9), Decl(classAndInterfaceWithSameName.ts, 1, 13))
+
+module M {
+>M : Symbol(M, Decl(classAndInterfaceWithSameName.ts, 1, 28))
+
+    class D {
+>D : Symbol(D, Decl(classAndInterfaceWithSameName.ts, 3, 10), Decl(classAndInterfaceWithSameName.ts, 6, 5))
+
+        bar: string;
+>bar : Symbol(D.bar, Decl(classAndInterfaceWithSameName.ts, 4, 13), Decl(classAndInterfaceWithSameName.ts, 8, 17))
+    }
+
+    interface D {
+>D : Symbol(D, Decl(classAndInterfaceWithSameName.ts, 3, 10), Decl(classAndInterfaceWithSameName.ts, 6, 5))
+
+        bar: string;
+>bar : Symbol(D.bar, Decl(classAndInterfaceWithSameName.ts, 4, 13), Decl(classAndInterfaceWithSameName.ts, 8, 17))
+    }
+}
diff --git a/tests/baselines/reference/classAndInterfaceWithSameName.types b/tests/baselines/reference/classAndInterfaceWithSameName.types
new file mode 100644
index 00000000000..274c4eb5c6a
--- /dev/null
+++ b/tests/baselines/reference/classAndInterfaceWithSameName.types
@@ -0,0 +1,26 @@
+=== tests/cases/conformance/classes/classDeclarations/classAndInterfaceWithSameName.ts ===
+class C { foo: string; }
+>C : C
+>foo : string
+
+interface C { foo: string; }
+>C : C
+>foo : string
+
+module M {
+>M : typeof M
+
+    class D {
+>D : D
+
+        bar: string;
+>bar : string
+    }
+
+    interface D {
+>D : D
+
+        bar: string;
+>bar : string
+    }
+}
diff --git a/tests/baselines/reference/constructSignatureWithAccessibilityModifiersOnParameters2.errors.txt b/tests/baselines/reference/constructSignatureWithAccessibilityModifiersOnParameters2.errors.txt
index e12f3a59ca1..1bc487189d3 100644
--- a/tests/baselines/reference/constructSignatureWithAccessibilityModifiersOnParameters2.errors.txt
+++ b/tests/baselines/reference/constructSignatureWithAccessibilityModifiersOnParameters2.errors.txt
@@ -1,12 +1,8 @@
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(4,17): error TS2369: A parameter property is only allowed in a constructor implementation.
-tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(4,24): error TS2300: Duplicate identifier 'x'.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(4,27): error TS2369: A parameter property is only allowed in a constructor implementation.
-tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(4,35): error TS2300: Duplicate identifier 'y'.
-tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(5,24): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(5,35): error TS2300: Duplicate identifier 'y'.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(9,17): error TS2369: A parameter property is only allowed in a constructor implementation.
-tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(9,25): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(10,24): error TS2300: Duplicate identifier 'x'.
+tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(9,25): error TS2686: All declarations of 'x' must have identical modifiers.
+tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(10,24): error TS2686: All declarations of 'x' must have identical modifiers.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(14,17): error TS2369: A parameter property is only allowed in a constructor implementation.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(19,10): error TS2369: A parameter property is only allowed in a constructor implementation.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(20,10): error TS2369: A parameter property is only allowed in a constructor implementation.
@@ -18,24 +14,16 @@ tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatur
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(35,10): error TS2369: A parameter property is only allowed in a constructor implementation.
 
 
-==== tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts (18 errors) ====
+==== tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts (14 errors) ====
     // Parameter properties are not valid in overloads of constructors
     
     class C {
         constructor(public x, private y);
                     ~~~~~~~~
 !!! error TS2369: A parameter property is only allowed in a constructor implementation.
-                           ~
-!!! error TS2300: Duplicate identifier 'x'.
                               ~~~~~~~~~
 !!! error TS2369: A parameter property is only allowed in a constructor implementation.
-                                      ~
-!!! error TS2300: Duplicate identifier 'y'.
         constructor(public x, private y) { }
-                           ~
-!!! error TS2300: Duplicate identifier 'x'.
-                                      ~
-!!! error TS2300: Duplicate identifier 'y'.
     }
     
     class C2 {
@@ -43,10 +31,10 @@ tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatur
                     ~~~~~~~~~
 !!! error TS2369: A parameter property is only allowed in a constructor implementation.
                             ~
-!!! error TS2300: Duplicate identifier 'x'.
+!!! error TS2686: All declarations of 'x' must have identical modifiers.
         constructor(public x) { }
                            ~
-!!! error TS2300: Duplicate identifier 'x'.
+!!! error TS2686: All declarations of 'x' must have identical modifiers.
     }
     
     class C3 {
diff --git a/tests/baselines/reference/constructorParameterProperties2.errors.txt b/tests/baselines/reference/constructorParameterProperties2.errors.txt
index 42df015bc5b..409660c3133 100644
--- a/tests/baselines/reference/constructorParameterProperties2.errors.txt
+++ b/tests/baselines/reference/constructorParameterProperties2.errors.txt
@@ -1,12 +1,13 @@
-tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(10,5): error TS2300: Duplicate identifier 'y'.
 tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(11,24): error TS2300: Duplicate identifier 'y'.
-tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(18,5): error TS2300: Duplicate identifier 'y'.
+tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(18,5): error TS2686: All declarations of 'y' must have identical modifiers.
 tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(19,25): error TS2300: Duplicate identifier 'y'.
-tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(26,5): error TS2300: Duplicate identifier 'y'.
+tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(19,25): error TS2686: All declarations of 'y' must have identical modifiers.
+tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(26,5): error TS2686: All declarations of 'y' must have identical modifiers.
 tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(27,27): error TS2300: Duplicate identifier 'y'.
+tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(27,27): error TS2686: All declarations of 'y' must have identical modifiers.
 
 
-==== tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts (6 errors) ====
+==== tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts (7 errors) ====
     class C {
         y: number;
         constructor(y: number) { } // ok
@@ -17,8 +18,6 @@ tests/cases/conformance/classes/constructorDeclarations/constructorParameters/co
     
     class D {
         y: number;
-        ~
-!!! error TS2300: Duplicate identifier 'y'.
         constructor(public y: number) { } // error
                            ~
 !!! error TS2300: Duplicate identifier 'y'.
@@ -30,10 +29,12 @@ tests/cases/conformance/classes/constructorDeclarations/constructorParameters/co
     class E {
         y: number;
         ~
-!!! error TS2300: Duplicate identifier 'y'.
+!!! error TS2686: All declarations of 'y' must have identical modifiers.
         constructor(private y: number) { } // error
                             ~
 !!! error TS2300: Duplicate identifier 'y'.
+                            ~
+!!! error TS2686: All declarations of 'y' must have identical modifiers.
     }
     
     var e: E;
@@ -42,10 +43,12 @@ tests/cases/conformance/classes/constructorDeclarations/constructorParameters/co
     class F {
         y: number;
         ~
-!!! error TS2300: Duplicate identifier 'y'.
+!!! error TS2686: All declarations of 'y' must have identical modifiers.
         constructor(protected y: number) { } // error
                               ~
 !!! error TS2300: Duplicate identifier 'y'.
+                              ~
+!!! error TS2686: All declarations of 'y' must have identical modifiers.
     }
     
     var f: F;
diff --git a/tests/baselines/reference/derivedInterfaceIncompatibleWithBaseIndexer.errors.txt b/tests/baselines/reference/derivedInterfaceIncompatibleWithBaseIndexer.errors.txt
index 7212121e106..e23384268b1 100644
--- a/tests/baselines/reference/derivedInterfaceIncompatibleWithBaseIndexer.errors.txt
+++ b/tests/baselines/reference/derivedInterfaceIncompatibleWithBaseIndexer.errors.txt
@@ -4,12 +4,10 @@ tests/cases/conformance/interfaces/interfaceDeclarations/derivedInterfaceIncompa
 tests/cases/conformance/interfaces/interfaceDeclarations/derivedInterfaceIncompatibleWithBaseIndexer.ts(11,5): error TS2412: Property ''1'' of type '{ y: number; }' is not assignable to numeric index type '{ x: number; y: number; }'.
 tests/cases/conformance/interfaces/interfaceDeclarations/derivedInterfaceIncompatibleWithBaseIndexer.ts(15,5): error TS2411: Property 'foo' of type '{ y: number; }' is not assignable to string index type '{ x: number; }'.
 tests/cases/conformance/interfaces/interfaceDeclarations/derivedInterfaceIncompatibleWithBaseIndexer.ts(19,5): error TS2411: Property 'foo' of type '() => { x: number; }' is not assignable to string index type '{ x: number; }'.
-tests/cases/conformance/interfaces/interfaceDeclarations/derivedInterfaceIncompatibleWithBaseIndexer.ts(24,5): error TS2300: Duplicate identifier '1'.
 tests/cases/conformance/interfaces/interfaceDeclarations/derivedInterfaceIncompatibleWithBaseIndexer.ts(24,5): error TS2412: Property '1' of type '{ x: number; }' is not assignable to numeric index type '{ x: number; y: number; }'.
-tests/cases/conformance/interfaces/interfaceDeclarations/derivedInterfaceIncompatibleWithBaseIndexer.ts(28,5): error TS2300: Duplicate identifier ''1''.
 
 
-==== tests/cases/conformance/interfaces/interfaceDeclarations/derivedInterfaceIncompatibleWithBaseIndexer.ts (9 errors) ====
+==== tests/cases/conformance/interfaces/interfaceDeclarations/derivedInterfaceIncompatibleWithBaseIndexer.ts (7 errors) ====
     interface Base {
         [x: number]: { x: number; y: number; };
         [x: string]: { x: number; }
@@ -46,14 +44,10 @@ tests/cases/conformance/interfaces/interfaceDeclarations/derivedInterfaceIncompa
     // satisifies string indexer but not numeric indexer
     interface Derived5 extends Base {
         1: { x: number } // error
-        ~
-!!! error TS2300: Duplicate identifier '1'.
         ~~~~~~~~~~~~~~~~
 !!! error TS2412: Property '1' of type '{ x: number; }' is not assignable to numeric index type '{ x: number; y: number; }'.
     }
     
     interface Derived5 extends Base {
         '1': { x: number } // error
-        ~~~
-!!! error TS2300: Duplicate identifier ''1''.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/duplicateClassElements.errors.txt b/tests/baselines/reference/duplicateClassElements.errors.txt
index 9dfec7a2908..7579190db71 100644
--- a/tests/baselines/reference/duplicateClassElements.errors.txt
+++ b/tests/baselines/reference/duplicateClassElements.errors.txt
@@ -1,4 +1,3 @@
-tests/cases/compiler/duplicateClassElements.ts(2,12): error TS2300: Duplicate identifier 'a'.
 tests/cases/compiler/duplicateClassElements.ts(3,12): error TS2300: Duplicate identifier 'a'.
 tests/cases/compiler/duplicateClassElements.ts(4,12): error TS2393: Duplicate function implementation.
 tests/cases/compiler/duplicateClassElements.ts(6,12): error TS2393: Duplicate function implementation.
@@ -15,10 +14,9 @@ tests/cases/compiler/duplicateClassElements.ts(23,9): error TS2300: Duplicate id
 tests/cases/compiler/duplicateClassElements.ts(26,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/duplicateClassElements.ts(26,9): error TS2300: Duplicate identifier 'z'.
 tests/cases/compiler/duplicateClassElements.ts(29,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/duplicateClassElements.ts(29,9): error TS2300: Duplicate identifier 'x2'.
 tests/cases/compiler/duplicateClassElements.ts(32,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/duplicateClassElements.ts(32,9): error TS2300: Duplicate identifier 'x2'.
 tests/cases/compiler/duplicateClassElements.ts(34,12): error TS2300: Duplicate identifier 'x2'.
+tests/cases/compiler/duplicateClassElements.ts(34,12): error TS2403: Subsequent variable declarations must have the same type.  Variable 'x2' must be of type 'number', but here has type 'any'.
 tests/cases/compiler/duplicateClassElements.ts(36,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/duplicateClassElements.ts(36,9): error TS2300: Duplicate identifier 'z2'.
 tests/cases/compiler/duplicateClassElements.ts(39,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
@@ -26,11 +24,9 @@ tests/cases/compiler/duplicateClassElements.ts(39,9): error TS2300: Duplicate id
 tests/cases/compiler/duplicateClassElements.ts(41,12): error TS2300: Duplicate identifier 'z2'.
 
 
-==== tests/cases/compiler/duplicateClassElements.ts (26 errors) ====
+==== tests/cases/compiler/duplicateClassElements.ts (24 errors) ====
     class a {
         public a;
-               ~
-!!! error TS2300: Duplicate identifier 'a'.
         public a;
                ~
 !!! error TS2300: Duplicate identifier 'a'.
@@ -90,19 +86,17 @@ tests/cases/compiler/duplicateClassElements.ts(41,12): error TS2300: Duplicate i
         get x2() {
             ~~
 !!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~~
-!!! error TS2300: Duplicate identifier 'x2'.
             return 10;
         }
         set x2(_x: number) {
             ~~
 !!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            ~~
-!!! error TS2300: Duplicate identifier 'x2'.
         }
         public x2;
                ~~
 !!! error TS2300: Duplicate identifier 'x2'.
+               ~~
+!!! error TS2403: Subsequent variable declarations must have the same type.  Variable 'x2' must be of type 'number', but here has type 'any'.
     
         get z2() {
             ~~
diff --git a/tests/baselines/reference/duplicateIdentifierComputedName.errors.txt b/tests/baselines/reference/duplicateIdentifierComputedName.errors.txt
new file mode 100644
index 00000000000..faef1106c41
--- /dev/null
+++ b/tests/baselines/reference/duplicateIdentifierComputedName.errors.txt
@@ -0,0 +1,11 @@
+tests/cases/compiler/duplicateIdentifierComputedName.ts(3,5): error TS2300: Duplicate identifier 'a'.
+
+
+==== tests/cases/compiler/duplicateIdentifierComputedName.ts (1 errors) ====
+    class C {
+        ["a"]: string;
+        ["a"]: string;
+        ~~~~~
+!!! error TS2300: Duplicate identifier 'a'.
+    }
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/duplicateIdentifierComputedName.js b/tests/baselines/reference/duplicateIdentifierComputedName.js
new file mode 100644
index 00000000000..df488d80724
--- /dev/null
+++ b/tests/baselines/reference/duplicateIdentifierComputedName.js
@@ -0,0 +1,13 @@
+//// [duplicateIdentifierComputedName.ts]
+class C {
+    ["a"]: string;
+    ["a"]: string;
+}
+
+
+//// [duplicateIdentifierComputedName.js]
+var C = (function () {
+    function C() {
+    }
+    return C;
+}());
diff --git a/tests/baselines/reference/duplicateIdentifierDifferentModifiers.errors.txt b/tests/baselines/reference/duplicateIdentifierDifferentModifiers.errors.txt
new file mode 100644
index 00000000000..c25609bfa42
--- /dev/null
+++ b/tests/baselines/reference/duplicateIdentifierDifferentModifiers.errors.txt
@@ -0,0 +1,37 @@
+tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts(2,15): error TS2686: All declarations of 'x' must have identical modifiers.
+tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts(3,15): error TS2686: All declarations of 'x' must have identical modifiers.
+tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts(16,11): error TS2686: All declarations of 'y' must have identical modifiers.
+tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts(20,3): error TS2686: All declarations of 'y' must have identical modifiers.
+
+
+==== tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts (4 errors) ====
+    // Not OK
+    interface B { x; }
+                  ~
+!!! error TS2686: All declarations of 'x' must have identical modifiers.
+    interface B { x?; }
+                  ~
+!!! error TS2686: All declarations of 'x' must have identical modifiers.
+    
+    // OK
+    class A {
+      public y: string;
+    }
+    
+    interface A {
+      y: string;
+    }
+    
+    // Not OK
+    class C {
+      private y: string;
+              ~
+!!! error TS2686: All declarations of 'y' must have identical modifiers.
+    }
+    
+    interface C {
+      y: string;
+      ~
+!!! error TS2686: All declarations of 'y' must have identical modifiers.
+    }
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/duplicateIdentifierDifferentModifiers.js b/tests/baselines/reference/duplicateIdentifierDifferentModifiers.js
new file mode 100644
index 00000000000..6500380f358
--- /dev/null
+++ b/tests/baselines/reference/duplicateIdentifierDifferentModifiers.js
@@ -0,0 +1,37 @@
+//// [duplicateIdentifierDifferentModifiers.ts]
+// Not OK
+interface B { x; }
+interface B { x?; }
+
+// OK
+class A {
+  public y: string;
+}
+
+interface A {
+  y: string;
+}
+
+// Not OK
+class C {
+  private y: string;
+}
+
+interface C {
+  y: string;
+}
+
+
+//// [duplicateIdentifierDifferentModifiers.js]
+// OK
+var A = (function () {
+    function A() {
+    }
+    return A;
+}());
+// Not OK
+var C = (function () {
+    function C() {
+    }
+    return C;
+}());
diff --git a/tests/baselines/reference/duplicateIdentifierDifferentSpelling.errors.txt b/tests/baselines/reference/duplicateIdentifierDifferentSpelling.errors.txt
new file mode 100644
index 00000000000..fda0f4a66d9
--- /dev/null
+++ b/tests/baselines/reference/duplicateIdentifierDifferentSpelling.errors.txt
@@ -0,0 +1,16 @@
+tests/cases/compiler/duplicateIdentifierDifferentSpelling.ts(3,3): error TS2300: Duplicate identifier '3'.
+tests/cases/compiler/duplicateIdentifierDifferentSpelling.ts(6,21): error TS2300: Duplicate identifier '3'.
+
+
+==== tests/cases/compiler/duplicateIdentifierDifferentSpelling.ts (2 errors) ====
+    class A {
+      0b11 = '';
+      3 = '';
+      ~
+!!! error TS2300: Duplicate identifier '3'.
+    }
+    
+    var X = { 0b11: '', 3: '' };
+                        ~
+!!! error TS2300: Duplicate identifier '3'.
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/duplicateIdentifierDifferentSpelling.js b/tests/baselines/reference/duplicateIdentifierDifferentSpelling.js
new file mode 100644
index 00000000000..96e5781919d
--- /dev/null
+++ b/tests/baselines/reference/duplicateIdentifierDifferentSpelling.js
@@ -0,0 +1,18 @@
+//// [duplicateIdentifierDifferentSpelling.ts]
+class A {
+  0b11 = '';
+  3 = '';
+}
+
+var X = { 0b11: '', 3: '' };
+
+
+//// [duplicateIdentifierDifferentSpelling.js]
+var A = (function () {
+    function A() {
+        this[3] = '';
+        this[3] = '';
+    }
+    return A;
+}());
+var X = { 3: '', 3: '' };
diff --git a/tests/baselines/reference/duplicateObjectLiteralProperty.errors.txt b/tests/baselines/reference/duplicateObjectLiteralProperty.errors.txt
index 0dd5febe496..abc56a6f8fc 100644
--- a/tests/baselines/reference/duplicateObjectLiteralProperty.errors.txt
+++ b/tests/baselines/reference/duplicateObjectLiteralProperty.errors.txt
@@ -1,8 +1,6 @@
-tests/cases/compiler/duplicateObjectLiteralProperty.ts(2,5): error TS2300: Duplicate identifier 'a'.
 tests/cases/compiler/duplicateObjectLiteralProperty.ts(4,5): error TS2300: Duplicate identifier 'a'.
 tests/cases/compiler/duplicateObjectLiteralProperty.ts(5,5): error TS2300: Duplicate identifier '\u0061'.
 tests/cases/compiler/duplicateObjectLiteralProperty.ts(6,5): error TS2300: Duplicate identifier 'a'.
-tests/cases/compiler/duplicateObjectLiteralProperty.ts(7,9): error TS2300: Duplicate identifier 'c'.
 tests/cases/compiler/duplicateObjectLiteralProperty.ts(8,9): error TS2300: Duplicate identifier '"c"'.
 tests/cases/compiler/duplicateObjectLiteralProperty.ts(14,9): error TS2300: Duplicate identifier 'a'.
 tests/cases/compiler/duplicateObjectLiteralProperty.ts(15,9): error TS2300: Duplicate identifier 'a'.
@@ -10,11 +8,9 @@ tests/cases/compiler/duplicateObjectLiteralProperty.ts(16,9): error TS1118: An o
 tests/cases/compiler/duplicateObjectLiteralProperty.ts(16,9): error TS2300: Duplicate identifier 'a'.
 
 
-==== tests/cases/compiler/duplicateObjectLiteralProperty.ts (10 errors) ====
+==== tests/cases/compiler/duplicateObjectLiteralProperty.ts (8 errors) ====
     var x = {
         a: 1,
-        ~
-!!! error TS2300: Duplicate identifier 'a'.
         b: true, // OK
         a: 56,   // Duplicate
         ~
@@ -26,8 +22,6 @@ tests/cases/compiler/duplicateObjectLiteralProperty.ts(16,9): error TS2300: Dupl
         ~
 !!! error TS2300: Duplicate identifier 'a'.
             c: 1,
-            ~
-!!! error TS2300: Duplicate identifier 'c'.
             "c": 56, // Duplicate
             ~~~
 !!! error TS2300: Duplicate identifier '"c"'.
diff --git a/tests/baselines/reference/duplicatePropertiesInStrictMode.errors.txt b/tests/baselines/reference/duplicatePropertiesInStrictMode.errors.txt
index b3d868dbe7e..17a55a7876b 100644
--- a/tests/baselines/reference/duplicatePropertiesInStrictMode.errors.txt
+++ b/tests/baselines/reference/duplicatePropertiesInStrictMode.errors.txt
@@ -1,14 +1,11 @@
-tests/cases/compiler/duplicatePropertiesInStrictMode.ts(3,3): error TS2300: Duplicate identifier 'x'.
 tests/cases/compiler/duplicatePropertiesInStrictMode.ts(4,3): error TS1117: An object literal cannot have multiple properties with the same name in strict mode.
 tests/cases/compiler/duplicatePropertiesInStrictMode.ts(4,3): error TS2300: Duplicate identifier 'x'.
 
 
-==== tests/cases/compiler/duplicatePropertiesInStrictMode.ts (3 errors) ====
+==== tests/cases/compiler/duplicatePropertiesInStrictMode.ts (2 errors) ====
     "use strict";
     var x = {
       x: 1,
-      ~
-!!! error TS2300: Duplicate identifier 'x'.
       x: 2
       ~
 !!! error TS1117: An object literal cannot have multiple properties with the same name in strict mode.
diff --git a/tests/baselines/reference/duplicatePropertyNames.errors.txt b/tests/baselines/reference/duplicatePropertyNames.errors.txt
index 108a88d1451..f8ed73c5707 100644
--- a/tests/baselines/reference/duplicatePropertyNames.errors.txt
+++ b/tests/baselines/reference/duplicatePropertyNames.errors.txt
@@ -2,11 +2,9 @@ tests/cases/conformance/types/members/duplicatePropertyNames.ts(4,5): error TS23
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(5,5): error TS2300: Duplicate identifier 'foo'.
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(14,5): error TS2300: Duplicate identifier 'foo'.
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(15,5): error TS2300: Duplicate identifier 'foo'.
-tests/cases/conformance/types/members/duplicatePropertyNames.ts(19,5): error TS2300: Duplicate identifier 'foo'.
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(20,5): error TS2300: Duplicate identifier 'foo'.
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(22,5): error TS2393: Duplicate function implementation.
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(23,5): error TS2393: Duplicate function implementation.
-tests/cases/conformance/types/members/duplicatePropertyNames.ts(25,5): error TS2300: Duplicate identifier 'baz'.
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(26,5): error TS2300: Duplicate identifier 'baz'.
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(30,5): error TS2300: Duplicate identifier 'foo'.
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(31,5): error TS2300: Duplicate identifier 'foo'.
@@ -14,13 +12,11 @@ tests/cases/conformance/types/members/duplicatePropertyNames.ts(35,5): error TS2
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(36,5): error TS2300: Duplicate identifier 'foo'.
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(38,5): error TS2300: Duplicate identifier 'bar'.
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(39,5): error TS2300: Duplicate identifier 'bar'.
-tests/cases/conformance/types/members/duplicatePropertyNames.ts(43,5): error TS2300: Duplicate identifier 'foo'.
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(44,5): error TS2300: Duplicate identifier 'foo'.
-tests/cases/conformance/types/members/duplicatePropertyNames.ts(45,5): error TS2300: Duplicate identifier 'bar'.
 tests/cases/conformance/types/members/duplicatePropertyNames.ts(46,5): error TS2300: Duplicate identifier 'bar'.
 
 
-==== tests/cases/conformance/types/members/duplicatePropertyNames.ts (20 errors) ====
+==== tests/cases/conformance/types/members/duplicatePropertyNames.ts (16 errors) ====
     // duplicate property names are an error in all types
     
     interface Number {
@@ -48,8 +44,6 @@ tests/cases/conformance/types/members/duplicatePropertyNames.ts(46,5): error TS2
     
     class C {
         foo: string;
-        ~~~
-!!! error TS2300: Duplicate identifier 'foo'.
         foo: string;
         ~~~
 !!! error TS2300: Duplicate identifier 'foo'.
@@ -62,8 +56,6 @@ tests/cases/conformance/types/members/duplicatePropertyNames.ts(46,5): error TS2
 !!! error TS2393: Duplicate function implementation.
     
         baz = () => { }
-        ~~~
-!!! error TS2300: Duplicate identifier 'baz'.
         baz = () => { }
         ~~~
 !!! error TS2300: Duplicate identifier 'baz'.
@@ -96,14 +88,10 @@ tests/cases/conformance/types/members/duplicatePropertyNames.ts(46,5): error TS2
     
     var b = {
         foo: '',
-        ~~~
-!!! error TS2300: Duplicate identifier 'foo'.
         foo: '',
         ~~~
 !!! error TS2300: Duplicate identifier 'foo'.
         bar: () => { },
-        ~~~
-!!! error TS2300: Duplicate identifier 'bar'.
         bar: () => { }
         ~~~
 !!! error TS2300: Duplicate identifier 'bar'.
diff --git a/tests/baselines/reference/duplicateStringNamedProperty1.errors.txt b/tests/baselines/reference/duplicateStringNamedProperty1.errors.txt
index 7d6c5d6bafc..c9652ef02d5 100644
--- a/tests/baselines/reference/duplicateStringNamedProperty1.errors.txt
+++ b/tests/baselines/reference/duplicateStringNamedProperty1.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/duplicateStringNamedProperty1.ts(2,5): error TS2300: Duplicate identifier '"artist"'.
+tests/cases/compiler/duplicateStringNamedProperty1.ts(2,5): error TS2300: Duplicate identifier 'artist'.
 tests/cases/compiler/duplicateStringNamedProperty1.ts(3,5): error TS2300: Duplicate identifier 'artist'.
 
 
@@ -6,7 +6,7 @@ tests/cases/compiler/duplicateStringNamedProperty1.ts(3,5): error TS2300: Duplic
     export interface Album {
         "artist": string;
         ~~~~~~~~
-!!! error TS2300: Duplicate identifier '"artist"'.
+!!! error TS2300: Duplicate identifier 'artist'.
         artist: string;
         ~~~~~~
 !!! error TS2300: Duplicate identifier 'artist'.
diff --git a/tests/baselines/reference/gettersAndSettersErrors.errors.txt b/tests/baselines/reference/gettersAndSettersErrors.errors.txt
index db2d4c5bc87..a3be786cb26 100644
--- a/tests/baselines/reference/gettersAndSettersErrors.errors.txt
+++ b/tests/baselines/reference/gettersAndSettersErrors.errors.txt
@@ -1,8 +1,7 @@
 tests/cases/compiler/gettersAndSettersErrors.ts(2,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSettersErrors.ts(2,16): error TS2300: Duplicate identifier 'Foo'.
 tests/cases/compiler/gettersAndSettersErrors.ts(3,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/compiler/gettersAndSettersErrors.ts(3,16): error TS2300: Duplicate identifier 'Foo'.
 tests/cases/compiler/gettersAndSettersErrors.ts(5,12): error TS2300: Duplicate identifier 'Foo'.
+tests/cases/compiler/gettersAndSettersErrors.ts(5,12): error TS2403: Subsequent variable declarations must have the same type.  Variable 'Foo' must be of type 'string', but here has type 'number'.
 tests/cases/compiler/gettersAndSettersErrors.ts(6,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/gettersAndSettersErrors.ts(7,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/compiler/gettersAndSettersErrors.ts(11,17): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
@@ -11,22 +10,20 @@ tests/cases/compiler/gettersAndSettersErrors.ts(12,16): error TS1056: Accessors
 tests/cases/compiler/gettersAndSettersErrors.ts(12,16): error TS2379: Getter and setter accessors do not agree in visibility.
 
 
-==== tests/cases/compiler/gettersAndSettersErrors.ts (11 errors) ====
+==== tests/cases/compiler/gettersAndSettersErrors.ts (10 errors) ====
     class C {
         public get Foo() { return "foo";} // ok
                    ~~~
 !!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~
-!!! error TS2300: Duplicate identifier 'Foo'.
         public set Foo(foo:string) {} // ok
                    ~~~
 !!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-                   ~~~
-!!! error TS2300: Duplicate identifier 'Foo'.
     
         public Foo = 0; // error - duplicate identifier Foo - confirmed
                ~~~
 !!! error TS2300: Duplicate identifier 'Foo'.
+               ~~~
+!!! error TS2403: Subsequent variable declarations must have the same type.  Variable 'Foo' must be of type 'string', but here has type 'number'.
         public get Goo(v:string):string {return null;} // error - getters must not have a parameter
                    ~~~
 !!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
diff --git a/tests/baselines/reference/interfaceDeclaration1.errors.txt b/tests/baselines/reference/interfaceDeclaration1.errors.txt
index b73cfef75df..95b3d90ca2c 100644
--- a/tests/baselines/reference/interfaceDeclaration1.errors.txt
+++ b/tests/baselines/reference/interfaceDeclaration1.errors.txt
@@ -2,6 +2,7 @@ tests/cases/compiler/interfaceDeclaration1.ts(2,5): error TS2300: Duplicate iden
 tests/cases/compiler/interfaceDeclaration1.ts(3,5): error TS2300: Duplicate identifier 'item'.
 tests/cases/compiler/interfaceDeclaration1.ts(7,5): error TS2300: Duplicate identifier 'item'.
 tests/cases/compiler/interfaceDeclaration1.ts(8,5): error TS2300: Duplicate identifier 'item'.
+tests/cases/compiler/interfaceDeclaration1.ts(8,5): error TS2403: Subsequent variable declarations must have the same type.  Variable 'item' must be of type 'any', but here has type 'number'.
 tests/cases/compiler/interfaceDeclaration1.ts(22,11): error TS2310: Type 'I5' recursively references itself as a base type.
 tests/cases/compiler/interfaceDeclaration1.ts(35,7): error TS2420: Class 'C1' incorrectly implements interface 'I3'.
   Property 'prototype' is missing in type 'C1'.
@@ -10,7 +11,7 @@ tests/cases/compiler/interfaceDeclaration1.ts(52,11): error TS2320: Interface 'i
   Named property 'foo' of types 'i10' and 'i11' are not identical.
 
 
-==== tests/cases/compiler/interfaceDeclaration1.ts (8 errors) ====
+==== tests/cases/compiler/interfaceDeclaration1.ts (9 errors) ====
     interface I1 {
         item:number;
         ~~~~
@@ -27,6 +28,8 @@ tests/cases/compiler/interfaceDeclaration1.ts(52,11): error TS2320: Interface 'i
         item:number;
         ~~~~
 !!! error TS2300: Duplicate identifier 'item'.
+        ~~~~
+!!! error TS2403: Subsequent variable declarations must have the same type.  Variable 'item' must be of type 'any', but here has type 'number'.
     }
     
     interface I3 {
diff --git a/tests/baselines/reference/jsFileCompilationBindMultipleDefaultExports.errors.txt b/tests/baselines/reference/jsFileCompilationBindMultipleDefaultExports.errors.txt
index 05fecf03d30..4c1d237aa47 100644
--- a/tests/baselines/reference/jsFileCompilationBindMultipleDefaultExports.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationBindMultipleDefaultExports.errors.txt
@@ -1,15 +1,9 @@
-tests/cases/compiler/a.js(1,22): error TS2528: A module cannot have multiple default exports.
-tests/cases/compiler/a.js(3,1): error TS2528: A module cannot have multiple default exports.
 tests/cases/compiler/a.js(3,16): error TS1109: Expression expected.
 
 
-==== tests/cases/compiler/a.js (3 errors) ====
+==== tests/cases/compiler/a.js (1 errors) ====
     export default class a {
-                         ~
-!!! error TS2528: A module cannot have multiple default exports.
     }
     export default var a = 10;
-    ~~~~~~~~~~~~~~
-!!! error TS2528: A module cannot have multiple default exports.
                    ~~~
 !!! error TS1109: Expression expected.
\ No newline at end of file
diff --git a/tests/baselines/reference/jsFileCompilationBindStrictModeErrors.errors.txt b/tests/baselines/reference/jsFileCompilationBindStrictModeErrors.errors.txt
index 65dffb5a08e..3cc2f5f085f 100644
--- a/tests/baselines/reference/jsFileCompilationBindStrictModeErrors.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationBindStrictModeErrors.errors.txt
@@ -1,6 +1,4 @@
-tests/cases/compiler/a.js(3,5): error TS2300: Duplicate identifier 'a'.
 tests/cases/compiler/a.js(5,5): error TS1117: An object literal cannot have multiple properties with the same name in strict mode.
-tests/cases/compiler/a.js(5,5): error TS2300: Duplicate identifier 'a'.
 tests/cases/compiler/a.js(7,5): error TS1212: Identifier expected. 'let' is a reserved word in strict mode
 tests/cases/compiler/a.js(8,8): error TS1102: 'delete' cannot be called on an identifier in strict mode.
 tests/cases/compiler/a.js(10,10): error TS1100: Invalid use of 'eval' in strict mode.
@@ -14,18 +12,14 @@ tests/cases/compiler/d.js(2,9): error TS1121: Octal literals are not allowed in
 tests/cases/compiler/d.js(2,11): error TS1005: ',' expected.
 
 
-==== tests/cases/compiler/a.js (8 errors) ====
+==== tests/cases/compiler/a.js (6 errors) ====
     "use strict";
     var a = {
         a: "hello", // error
-        ~
-!!! error TS2300: Duplicate identifier 'a'.
         b: 10,
         a: 10 // error
         ~
 !!! error TS1117: An object literal cannot have multiple properties with the same name in strict mode.
-        ~
-!!! error TS2300: Duplicate identifier 'a'.
     };
     var let = 10; // error
         ~~~
diff --git a/tests/baselines/reference/lastPropertyInLiteralWins.errors.txt b/tests/baselines/reference/lastPropertyInLiteralWins.errors.txt
index 51fce2d29d4..2b4a694975b 100644
--- a/tests/baselines/reference/lastPropertyInLiteralWins.errors.txt
+++ b/tests/baselines/reference/lastPropertyInLiteralWins.errors.txt
@@ -3,13 +3,11 @@ tests/cases/compiler/lastPropertyInLiteralWins.ts(7,6): error TS2345: Argument o
     Type '(num: number) => void' is not assignable to type '(str: string) => void'.
       Types of parameters 'num' and 'str' are incompatible.
         Type 'string' is not assignable to type 'number'.
-tests/cases/compiler/lastPropertyInLiteralWins.ts(8,5): error TS2300: Duplicate identifier 'thunk'.
 tests/cases/compiler/lastPropertyInLiteralWins.ts(9,5): error TS2300: Duplicate identifier 'thunk'.
-tests/cases/compiler/lastPropertyInLiteralWins.ts(13,5): error TS2300: Duplicate identifier 'thunk'.
 tests/cases/compiler/lastPropertyInLiteralWins.ts(14,5): error TS2300: Duplicate identifier 'thunk'.
 
 
-==== tests/cases/compiler/lastPropertyInLiteralWins.ts (5 errors) ====
+==== tests/cases/compiler/lastPropertyInLiteralWins.ts (3 errors) ====
     interface Thing {
         thunk: (str: string) => void;
     }
@@ -20,8 +18,6 @@ tests/cases/compiler/lastPropertyInLiteralWins.ts(14,5): error TS2300: Duplicate
          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         thunk: (str: string) => {},
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-        ~~~~~
-!!! error TS2300: Duplicate identifier 'thunk'.
         thunk: (num: number) => {}
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
         ~~~~~
@@ -36,8 +32,6 @@ tests/cases/compiler/lastPropertyInLiteralWins.ts(14,5): error TS2300: Duplicate
     
     test({ // Should be OK.  Last 'thunk' is of correct type
         thunk: (num: number) => {},
-        ~~~~~
-!!! error TS2300: Duplicate identifier 'thunk'.
         thunk: (str: string) => {}
         ~~~~~
 !!! error TS2300: Duplicate identifier 'thunk'.
diff --git a/tests/baselines/reference/memberOverride.errors.txt b/tests/baselines/reference/memberOverride.errors.txt
index b4974e69e53..15c4b2ad37b 100644
--- a/tests/baselines/reference/memberOverride.errors.txt
+++ b/tests/baselines/reference/memberOverride.errors.txt
@@ -1,14 +1,11 @@
-tests/cases/compiler/memberOverride.ts(4,5): error TS2300: Duplicate identifier 'a'.
 tests/cases/compiler/memberOverride.ts(5,5): error TS2300: Duplicate identifier 'a'.
 
 
-==== tests/cases/compiler/memberOverride.ts (2 errors) ====
+==== tests/cases/compiler/memberOverride.ts (1 errors) ====
     // An object initialiser accepts the first definition for the same property with a different type signature
     // Should compile, since the second declaration of a overrides the first
     var x = {
         a: "", 
-        ~
-!!! error TS2300: Duplicate identifier 'a'.
         a: 5
         ~
 !!! error TS2300: Duplicate identifier 'a'.
diff --git a/tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames.errors.txt b/tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames.errors.txt
index 0b5984dcc6d..437bf2d80f0 100644
--- a/tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames.errors.txt
+++ b/tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames.errors.txt
@@ -1,35 +1,28 @@
-tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames.ts(2,5): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames.ts(6,5): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames.ts(11,9): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames.ts(15,9): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames.ts(33,9): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames.ts(39,9): error TS2300: Duplicate identifier 'x'.
+tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames.ts(6,5): error TS2403: Subsequent variable declarations must have the same type.  Variable 'x' must be of type 'string', but here has type 'number'.
+tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames.ts(15,9): error TS2403: Subsequent variable declarations must have the same type.  Variable 'x' must be of type 'T', but here has type 'number'.
+tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames.ts(39,9): error TS2403: Subsequent variable declarations must have the same type.  Variable 'x' must be of type 'T', but here has type 'number'.
 
 
-==== tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames.ts (6 errors) ====
+==== tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames.ts (3 errors) ====
     interface A {
         x: string; // error
-        ~
-!!! error TS2300: Duplicate identifier 'x'.
     }
     
     interface A {
         x: number;
         ~
-!!! error TS2300: Duplicate identifier 'x'.
+!!! error TS2403: Subsequent variable declarations must have the same type.  Variable 'x' must be of type 'string', but here has type 'number'.
     }
     
     module M {
         interface A<T> {
             x: T;
-            ~
-!!! error TS2300: Duplicate identifier 'x'.
         }
     
         interface A<T> {
             x: number;  // error
             ~
-!!! error TS2300: Duplicate identifier 'x'.
+!!! error TS2403: Subsequent variable declarations must have the same type.  Variable 'x' must be of type 'T', but here has type 'number'.
         }
     }
     
@@ -48,8 +41,6 @@ tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConfli
     module M3 {
         export interface A<T> {
             x: T;
-            ~
-!!! error TS2300: Duplicate identifier 'x'.
         }
     }
     
@@ -57,6 +48,6 @@ tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConfli
         export interface A<T> {
             x: number;  // error
             ~
-!!! error TS2300: Duplicate identifier 'x'.
+!!! error TS2403: Subsequent variable declarations must have the same type.  Variable 'x' must be of type 'T', but here has type 'number'.
         }
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames2.errors.txt b/tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames2.errors.txt
deleted file mode 100644
index d0a50f4ae69..00000000000
--- a/tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames2.errors.txt
+++ /dev/null
@@ -1,62 +0,0 @@
-tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames2.ts(2,5): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames2.ts(6,5): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames2.ts(11,9): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames2.ts(15,9): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames2.ts(33,9): error TS2300: Duplicate identifier 'x'.
-tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames2.ts(39,9): error TS2300: Duplicate identifier 'x'.
-
-
-==== tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames2.ts (6 errors) ====
-    interface A {
-        x: string; // error
-        ~
-!!! error TS2300: Duplicate identifier 'x'.
-    }
-    
-    interface A {
-        x: string; // error
-        ~
-!!! error TS2300: Duplicate identifier 'x'.
-    }
-    
-    module M {
-        interface A<T> {
-            x: T;
-            ~
-!!! error TS2300: Duplicate identifier 'x'.
-        }
-    
-        interface A<T> {
-            x: T;  // error
-            ~
-!!! error TS2300: Duplicate identifier 'x'.
-        }
-    }
-    
-    module M2 {
-        interface A<T> {
-            x: T;
-        }   
-    }
-    
-    module M2 {
-        interface A<T> {
-            x: T;  // ok, different declaration space than other M2
-        }
-    }
-    
-    module M3 {
-        export interface A<T> {
-            x: T;
-            ~
-!!! error TS2300: Duplicate identifier 'x'.
-        }
-    }
-    
-    module M3 {
-        export interface A<T> {
-            x: T;  // error
-            ~
-!!! error TS2300: Duplicate identifier 'x'.
-        }
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames2.symbols b/tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames2.symbols
new file mode 100644
index 00000000000..70de1ae8c99
--- /dev/null
+++ b/tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames2.symbols
@@ -0,0 +1,88 @@
+=== tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames2.ts ===
+interface A {
+>A : Symbol(A, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 0, 0), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 2, 1))
+
+    x: string; // error
+>x : Symbol(A.x, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 0, 13), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 4, 13))
+}
+
+interface A {
+>A : Symbol(A, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 0, 0), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 2, 1))
+
+    x: string; // error
+>x : Symbol(A.x, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 0, 13), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 4, 13))
+}
+
+module M {
+>M : Symbol(M, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 6, 1))
+
+    interface A<T> {
+>A : Symbol(A, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 8, 10), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 11, 5))
+>T : Symbol(T, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 9, 16), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 13, 16))
+
+        x: T;
+>x : Symbol(A.x, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 9, 20), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 13, 20))
+>T : Symbol(T, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 9, 16), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 13, 16))
+    }
+
+    interface A<T> {
+>A : Symbol(A, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 8, 10), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 11, 5))
+>T : Symbol(T, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 9, 16), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 13, 16))
+
+        x: T;  // error
+>x : Symbol(A.x, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 9, 20), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 13, 20))
+>T : Symbol(T, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 9, 16), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 13, 16))
+    }
+}
+
+module M2 {
+>M2 : Symbol(M2, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 16, 1), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 22, 1))
+
+    interface A<T> {
+>A : Symbol(A, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 18, 11))
+>T : Symbol(T, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 19, 16))
+
+        x: T;
+>x : Symbol(A.x, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 19, 20))
+>T : Symbol(T, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 19, 16))
+    }   
+}
+
+module M2 {
+>M2 : Symbol(M2, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 16, 1), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 22, 1))
+
+    interface A<T> {
+>A : Symbol(A, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 24, 11))
+>T : Symbol(T, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 25, 16))
+
+        x: T;  // ok, different declaration space than other M2
+>x : Symbol(A.x, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 25, 20))
+>T : Symbol(T, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 25, 16))
+    }
+}
+
+module M3 {
+>M3 : Symbol(M3, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 28, 1), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 34, 1))
+
+    export interface A<T> {
+>A : Symbol(A, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 30, 11), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 36, 11))
+>T : Symbol(T, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 31, 23), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 37, 23))
+
+        x: T;
+>x : Symbol(A.x, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 31, 27), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 37, 27))
+>T : Symbol(T, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 31, 23), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 37, 23))
+    }
+}
+
+module M3 {
+>M3 : Symbol(M3, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 28, 1), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 34, 1))
+
+    export interface A<T> {
+>A : Symbol(A, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 30, 11), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 36, 11))
+>T : Symbol(T, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 31, 23), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 37, 23))
+
+        x: T;  // error
+>x : Symbol(A.x, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 31, 27), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 37, 27))
+>T : Symbol(T, Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 31, 23), Decl(mergedInterfacesWithConflictingPropertyNames2.ts, 37, 23))
+    }
+}
diff --git a/tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames2.types b/tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames2.types
new file mode 100644
index 00000000000..ec7fa633d7b
--- /dev/null
+++ b/tests/baselines/reference/mergedInterfacesWithConflictingPropertyNames2.types
@@ -0,0 +1,88 @@
+=== tests/cases/conformance/interfaces/declarationMerging/mergedInterfacesWithConflictingPropertyNames2.ts ===
+interface A {
+>A : A
+
+    x: string; // error
+>x : string
+}
+
+interface A {
+>A : A
+
+    x: string; // error
+>x : string
+}
+
+module M {
+>M : any
+
+    interface A<T> {
+>A : A<T>
+>T : T
+
+        x: T;
+>x : T
+>T : T
+    }
+
+    interface A<T> {
+>A : A<T>
+>T : T
+
+        x: T;  // error
+>x : T
+>T : T
+    }
+}
+
+module M2 {
+>M2 : any
+
+    interface A<T> {
+>A : A<T>
+>T : T
+
+        x: T;
+>x : T
+>T : T
+    }   
+}
+
+module M2 {
+>M2 : any
+
+    interface A<T> {
+>A : A<T>
+>T : T
+
+        x: T;  // ok, different declaration space than other M2
+>x : T
+>T : T
+    }
+}
+
+module M3 {
+>M3 : any
+
+    export interface A<T> {
+>A : A<T>
+>T : T
+
+        x: T;
+>x : T
+>T : T
+    }
+}
+
+module M3 {
+>M3 : any
+
+    export interface A<T> {
+>A : A<T>
+>T : T
+
+        x: T;  // error
+>x : T
+>T : T
+    }
+}
diff --git a/tests/baselines/reference/multipleDefaultExports01.errors.txt b/tests/baselines/reference/multipleDefaultExports01.errors.txt
index 16aa3b2f7b1..b3e7d757289 100644
--- a/tests/baselines/reference/multipleDefaultExports01.errors.txt
+++ b/tests/baselines/reference/multipleDefaultExports01.errors.txt
@@ -1,13 +1,16 @@
+tests/cases/conformance/es6/modules/m1.ts(2,22): error TS2323: Cannot redeclare exported variable 'default'.
 tests/cases/conformance/es6/modules/m1.ts(2,22): error TS2528: A module cannot have multiple default exports.
 tests/cases/conformance/es6/modules/m1.ts(6,25): error TS2528: A module cannot have multiple default exports.
-tests/cases/conformance/es6/modules/m1.ts(11,1): error TS2528: A module cannot have multiple default exports.
+tests/cases/conformance/es6/modules/m1.ts(11,1): error TS2323: Cannot redeclare exported variable 'default'.
 tests/cases/conformance/es6/modules/m2.ts(3,1): error TS2348: Value of type 'typeof foo' is not callable. Did you mean to include 'new'?
 
 
-==== tests/cases/conformance/es6/modules/m1.ts (3 errors) ====
+==== tests/cases/conformance/es6/modules/m1.ts (4 errors) ====
     
     export default class foo {
                          ~~~
+!!! error TS2323: Cannot redeclare exported variable 'default'.
+                         ~~~
 !!! error TS2528: A module cannot have multiple default exports.
     
     }
@@ -21,7 +24,7 @@ tests/cases/conformance/es6/modules/m2.ts(3,1): error TS2348: Value of type 'typ
     var x = 10;
     export default x;
     ~~~~~~~~~~~~~~~~~
-!!! error TS2528: A module cannot have multiple default exports.
+!!! error TS2323: Cannot redeclare exported variable 'default'.
     
 ==== tests/cases/conformance/es6/modules/m2.ts (1 errors) ====
     import Entity from "./m1"
diff --git a/tests/baselines/reference/numericClassMembers1.errors.txt b/tests/baselines/reference/numericClassMembers1.errors.txt
index eb99f26bb4c..7c99932e937 100644
--- a/tests/baselines/reference/numericClassMembers1.errors.txt
+++ b/tests/baselines/reference/numericClassMembers1.errors.txt
@@ -1,26 +1,20 @@
-tests/cases/compiler/numericClassMembers1.ts(2,3): error TS2300: Duplicate identifier '0'.
-tests/cases/compiler/numericClassMembers1.ts(3,3): error TS2300: Duplicate identifier '0.0'.
-tests/cases/compiler/numericClassMembers1.ts(7,3): error TS2300: Duplicate identifier '0.0'.
-tests/cases/compiler/numericClassMembers1.ts(8,2): error TS2300: Duplicate identifier ''0''.
+tests/cases/compiler/numericClassMembers1.ts(3,3): error TS2300: Duplicate identifier '0'.
+tests/cases/compiler/numericClassMembers1.ts(8,2): error TS2300: Duplicate identifier '0'.
 
 
-==== tests/cases/compiler/numericClassMembers1.ts (4 errors) ====
+==== tests/cases/compiler/numericClassMembers1.ts (2 errors) ====
     class C234 {
       0 = 1; 
-      ~
-!!! error TS2300: Duplicate identifier '0'.
       0.0 = 2;
       ~~~
-!!! error TS2300: Duplicate identifier '0.0'.
+!!! error TS2300: Duplicate identifier '0'.
     }
      
     class C235 { 
       0.0 = 1;
-      ~~~
-!!! error TS2300: Duplicate identifier '0.0'.
      '0' = 2;
      ~~~
-!!! error TS2300: Duplicate identifier ''0''.
+!!! error TS2300: Duplicate identifier '0'.
     }
     
     class C236 {
diff --git a/tests/baselines/reference/numericNamedPropertyDuplicates.errors.txt b/tests/baselines/reference/numericNamedPropertyDuplicates.errors.txt
index 1c5eeb36b27..24801f2847a 100644
--- a/tests/baselines/reference/numericNamedPropertyDuplicates.errors.txt
+++ b/tests/baselines/reference/numericNamedPropertyDuplicates.errors.txt
@@ -1,27 +1,19 @@
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(2,5): error TS2300: Duplicate identifier '1'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(3,5): error TS2300: Duplicate identifier '1.0'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(4,12): error TS2300: Duplicate identifier '2'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(3,5): error TS2300: Duplicate identifier '1'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(5,12): error TS2300: Duplicate identifier '2'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(9,5): error TS2300: Duplicate identifier '2'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(10,5): error TS2300: Duplicate identifier '2.'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(10,5): error TS2300: Duplicate identifier '2'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(14,5): error TS2300: Duplicate identifier '1'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(15,5): error TS2300: Duplicate identifier '1'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(19,5): error TS2300: Duplicate identifier '2'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(20,5): error TS1005: ',' expected.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(20,5): error TS2300: Duplicate identifier '2'.
 
 
-==== tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts (11 errors) ====
+==== tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts (7 errors) ====
     class C {
         1: number;
-        ~
-!!! error TS2300: Duplicate identifier '1'.
         1.0: number;
         ~~~
-!!! error TS2300: Duplicate identifier '1.0'.
+!!! error TS2300: Duplicate identifier '1'.
         static 2: number;
-               ~
-!!! error TS2300: Duplicate identifier '2'.
         static 2: number;
                ~
 !!! error TS2300: Duplicate identifier '2'.
@@ -33,7 +25,7 @@ tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedP
 !!! error TS2300: Duplicate identifier '2'.
         2.: number;
         ~~
-!!! error TS2300: Duplicate identifier '2.'.
+!!! error TS2300: Duplicate identifier '2'.
     }
     
     var a: {
@@ -47,11 +39,7 @@ tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedP
     
     var b = {
         2: 1
-        ~
-!!! error TS2300: Duplicate identifier '2'.
         2: 1
         ~
 !!! error TS1005: ',' expected.
-        ~
-!!! error TS2300: Duplicate identifier '2'.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/numericStringNamedPropertyEquivalence.errors.txt b/tests/baselines/reference/numericStringNamedPropertyEquivalence.errors.txt
index 4ebef99bd07..359a45ded51 100644
--- a/tests/baselines/reference/numericStringNamedPropertyEquivalence.errors.txt
+++ b/tests/baselines/reference/numericStringNamedPropertyEquivalence.errors.txt
@@ -1,30 +1,27 @@
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(4,5): error TS2300: Duplicate identifier '"1"'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(6,5): error TS2300: Duplicate identifier '1.0'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(10,5): error TS2300: Duplicate identifier '"1"'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(6,5): error TS2300: Duplicate identifier '1'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(10,5): error TS2300: Duplicate identifier '1'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(12,5): error TS2300: Duplicate identifier '1'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(16,5): error TS2300: Duplicate identifier '"1"'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(17,5): error TS2300: Duplicate identifier '1.0'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(21,5): error TS2300: Duplicate identifier '"0"'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(16,5): error TS2300: Duplicate identifier '1'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(17,5): error TS2300: Duplicate identifier '1'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(17,5): error TS2403: Subsequent variable declarations must have the same type.  Variable '1.0' must be of type 'number', but here has type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(22,5): error TS2300: Duplicate identifier '0'.
 
 
-==== tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts (8 errors) ====
+==== tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts (7 errors) ====
     // Each of these types has an error in it. 
     // String named and numeric named properties conflict if they would be equivalent after ToNumber on the property name.
     class C {
         "1": number;
-        ~~~
-!!! error TS2300: Duplicate identifier '"1"'.
         "1.0": number; // not a duplicate
         1.0: number;
         ~~~
-!!! error TS2300: Duplicate identifier '1.0'.
+!!! error TS2300: Duplicate identifier '1'.
     }
     
     interface I {
         "1": number;
         ~~~
-!!! error TS2300: Duplicate identifier '"1"'.
+!!! error TS2300: Duplicate identifier '1'.
         "1.": number; // not a duplicate
         1: number;
         ~
@@ -34,16 +31,16 @@ tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericString
     var a: {
         "1": number;
         ~~~
-!!! error TS2300: Duplicate identifier '"1"'.
+!!! error TS2300: Duplicate identifier '1'.
         1.0: string;
         ~~~
-!!! error TS2300: Duplicate identifier '1.0'.
+!!! error TS2300: Duplicate identifier '1'.
+        ~~~
+!!! error TS2403: Subsequent variable declarations must have the same type.  Variable '1.0' must be of type 'number', but here has type 'string'.
     }
     
     var b = {
         "0": '',
-        ~~~
-!!! error TS2300: Duplicate identifier '"0"'.
         0: ''
         ~
 !!! error TS2300: Duplicate identifier '0'.
diff --git a/tests/baselines/reference/objectLiteralErrors.errors.txt b/tests/baselines/reference/objectLiteralErrors.errors.txt
index 134b79a443e..2505748760c 100644
--- a/tests/baselines/reference/objectLiteralErrors.errors.txt
+++ b/tests/baselines/reference/objectLiteralErrors.errors.txt
@@ -1,39 +1,21 @@
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(3,12): error TS2300: Duplicate identifier 'a'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(3,18): error TS2300: Duplicate identifier 'a'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(4,12): error TS2300: Duplicate identifier 'a'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(4,19): error TS2300: Duplicate identifier 'a'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(5,12): error TS2300: Duplicate identifier 'a'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(5,18): error TS2300: Duplicate identifier 'a'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(6,12): error TS2300: Duplicate identifier 'a'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(6,21): error TS2300: Duplicate identifier 'a'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(7,12): error TS2300: Duplicate identifier 'a'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(7,19): error TS2300: Duplicate identifier 'a'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(8,12): error TS2300: Duplicate identifier 'a'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(8,18): error TS2300: Duplicate identifier ''a''.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(9,12): error TS2300: Duplicate identifier ''a''.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(9,20): error TS2300: Duplicate identifier 'a'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(10,12): error TS2300: Duplicate identifier ''a''.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(10,20): error TS2300: Duplicate identifier '"a"'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(11,12): error TS2300: Duplicate identifier ''a''.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(11,20): error TS2300: Duplicate identifier ''a''.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(12,13): error TS2300: Duplicate identifier '"a"'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(12,21): error TS2300: Duplicate identifier ''a''.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(13,13): error TS2300: Duplicate identifier '1.0'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(13,21): error TS2300: Duplicate identifier ''1''.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(14,13): error TS2300: Duplicate identifier '0'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(14,19): error TS2300: Duplicate identifier '0'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(15,13): error TS2300: Duplicate identifier '0'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(15,19): error TS2300: Duplicate identifier '0'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(16,13): error TS2300: Duplicate identifier '0'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(16,19): error TS2300: Duplicate identifier '0x0'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(17,13): error TS2300: Duplicate identifier '0'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(17,19): error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(17,19): error TS2300: Duplicate identifier '000'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(18,13): error TS2300: Duplicate identifier '"100"'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(18,23): error TS2300: Duplicate identifier '1e2'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(19,13): error TS2300: Duplicate identifier '0x20'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(19,22): error TS2300: Duplicate identifier '3.2e1'.
-tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(20,13): error TS2300: Duplicate identifier 'a'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(20,25): error TS2300: Duplicate identifier 'a'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(23,12): error TS2300: Duplicate identifier 'a'.
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(23,22): error TS1119: An object literal cannot have property and accessor with the same name.
@@ -96,99 +78,63 @@ tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(45,16)
 tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts(45,55): error TS2380: 'get' and 'set' accessor must have the same type.
 
 
-==== tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts (96 errors) ====
+==== tests/cases/conformance/expressions/objectLiterals/objectLiteralErrors.ts (78 errors) ====
     
     // Multiple properties with the same name
     var e1 = { a: 0, a: 0 };
-               ~
-!!! error TS2300: Duplicate identifier 'a'.
                      ~
 !!! error TS2300: Duplicate identifier 'a'.
     var e2 = { a: '', a: '' };
-               ~
-!!! error TS2300: Duplicate identifier 'a'.
                       ~
 !!! error TS2300: Duplicate identifier 'a'.
     var e3 = { a: 0, a: '' };
-               ~
-!!! error TS2300: Duplicate identifier 'a'.
                      ~
 !!! error TS2300: Duplicate identifier 'a'.
     var e4 = { a: true, a: false };
-               ~
-!!! error TS2300: Duplicate identifier 'a'.
                         ~
 !!! error TS2300: Duplicate identifier 'a'.
     var e5 = { a: {}, a: {} };
-               ~
-!!! error TS2300: Duplicate identifier 'a'.
                       ~
 !!! error TS2300: Duplicate identifier 'a'.
     var e6 = { a: 0, 'a': 0 };
-               ~
-!!! error TS2300: Duplicate identifier 'a'.
                      ~~~
 !!! error TS2300: Duplicate identifier ''a''.
     var e7 = { 'a': 0, a: 0 };
-               ~~~
-!!! error TS2300: Duplicate identifier ''a''.
                        ~
 !!! error TS2300: Duplicate identifier 'a'.
     var e8 = { 'a': 0, "a": 0 };
-               ~~~
-!!! error TS2300: Duplicate identifier ''a''.
                        ~~~
 !!! error TS2300: Duplicate identifier '"a"'.
     var e9 = { 'a': 0, 'a': 0 };
-               ~~~
-!!! error TS2300: Duplicate identifier ''a''.
                        ~~~
 !!! error TS2300: Duplicate identifier ''a''.
     var e10 = { "a": 0, 'a': 0 };
-                ~~~
-!!! error TS2300: Duplicate identifier '"a"'.
                         ~~~
 !!! error TS2300: Duplicate identifier ''a''.
     var e11 = { 1.0: 0, '1': 0 };
-                ~~~
-!!! error TS2300: Duplicate identifier '1.0'.
                         ~~~
 !!! error TS2300: Duplicate identifier ''1''.
     var e12 = { 0: 0, 0: 0 };
-                ~
-!!! error TS2300: Duplicate identifier '0'.
                       ~
 !!! error TS2300: Duplicate identifier '0'.
     var e13 = { 0: 0, 0: 0 };
-                ~
-!!! error TS2300: Duplicate identifier '0'.
                       ~
 !!! error TS2300: Duplicate identifier '0'.
     var e14 = { 0: 0, 0x0: 0 };
-                ~
-!!! error TS2300: Duplicate identifier '0'.
                       ~~~
 !!! error TS2300: Duplicate identifier '0x0'.
     var e14 = { 0: 0, 000: 0 };
-                ~
-!!! error TS2300: Duplicate identifier '0'.
                       ~~~
 !!! error TS1085: Octal literals are not available when targeting ECMAScript 5 and higher.
                       ~~~
 !!! error TS2300: Duplicate identifier '000'.
     var e15 = { "100": 0, 1e2: 0 };
-                ~~~~~
-!!! error TS2300: Duplicate identifier '"100"'.
                           ~~~
 !!! error TS2300: Duplicate identifier '1e2'.
     var e16 = { 0x20: 0, 3.2e1: 0 };
-                ~~~~
-!!! error TS2300: Duplicate identifier '0x20'.
                          ~~~~~
 !!! error TS2300: Duplicate identifier '3.2e1'.
     var e17 = { a: 0, b: 1, a: 0 };
-                ~
-!!! error TS2300: Duplicate identifier 'a'.
                             ~
 !!! error TS2300: Duplicate identifier 'a'.
     
diff --git a/tests/baselines/reference/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.errors.txt b/tests/baselines/reference/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.errors.txt
index 80bfb49883b..5fa8a12e875 100644
--- a/tests/baselines/reference/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.errors.txt
+++ b/tests/baselines/reference/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.errors.txt
@@ -7,16 +7,13 @@ tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPr
 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.ts(9,8): error TS1005: ':' expected.
 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.ts(10,10): error TS1005: ':' expected.
 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.ts(12,1): error TS1005: ':' expected.
-tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.ts(15,5): error TS2300: Duplicate identifier 'a'.
 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.ts(15,6): error TS1005: ':' expected.
-tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.ts(16,5): error TS2300: Duplicate identifier 'a'.
 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.ts(16,6): error TS1005: ':' expected.
-tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.ts(17,5): error TS2300: Duplicate identifier 'a'.
 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.ts(17,6): error TS1005: ':' expected.
 tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.ts(20,17): error TS1005: ':' expected.
 
 
-==== tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.ts (16 errors) ====
+==== tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPropertiesErrorFromNotUsingIdentifier.ts (13 errors) ====
     // errors
     var y = {
         "stringLiteral",
@@ -50,18 +47,12 @@ tests/cases/conformance/es6/shorthandPropertyAssignment/objectLiteralShorthandPr
     
     var x = {
         a.b,
-        ~
-!!! error TS2300: Duplicate identifier 'a'.
          ~
 !!! error TS1005: ':' expected.
         a["ss"],
-        ~
-!!! error TS2300: Duplicate identifier 'a'.
          ~
 !!! error TS1005: ':' expected.
         a[1],
-        ~
-!!! error TS2300: Duplicate identifier 'a'.
          ~
 !!! error TS1005: ':' expected.
     };
diff --git a/tests/baselines/reference/objectTypeWithDuplicateNumericProperty.errors.txt b/tests/baselines/reference/objectTypeWithDuplicateNumericProperty.errors.txt
index c89cd04d1ee..0565bf884e0 100644
--- a/tests/baselines/reference/objectTypeWithDuplicateNumericProperty.errors.txt
+++ b/tests/baselines/reference/objectTypeWithDuplicateNumericProperty.errors.txt
@@ -1,38 +1,34 @@
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(5,5): error TS2300: Duplicate identifier '1'.
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(6,5): error TS2300: Duplicate identifier '1.0'.
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(7,5): error TS2300: Duplicate identifier '1.'.
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(8,5): error TS2300: Duplicate identifier '1.00'.
+tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(6,5): error TS2300: Duplicate identifier '1'.
+tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(7,5): error TS2300: Duplicate identifier '1'.
+tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(8,5): error TS2300: Duplicate identifier '1'.
 tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(12,5): error TS2300: Duplicate identifier '1'.
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(13,5): error TS2300: Duplicate identifier '1.0'.
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(14,5): error TS2300: Duplicate identifier '1.'.
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(15,5): error TS2300: Duplicate identifier '1.00'.
+tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(13,5): error TS2300: Duplicate identifier '1'.
+tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(14,5): error TS2300: Duplicate identifier '1'.
+tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(15,5): error TS2300: Duplicate identifier '1'.
 tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(19,5): error TS2300: Duplicate identifier '1'.
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(20,5): error TS2300: Duplicate identifier '1.0'.
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(21,5): error TS2300: Duplicate identifier '1.'.
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(22,5): error TS2300: Duplicate identifier '1.00'.
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(26,5): error TS2300: Duplicate identifier '1'.
+tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(20,5): error TS2300: Duplicate identifier '1'.
+tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(21,5): error TS2300: Duplicate identifier '1'.
+tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(22,5): error TS2300: Duplicate identifier '1'.
 tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(27,5): error TS2300: Duplicate identifier '1.0'.
 tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(28,5): error TS2300: Duplicate identifier '1.'.
 tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(29,5): error TS2300: Duplicate identifier '1.00'.
 
 
-==== tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts (16 errors) ====
+==== tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts (14 errors) ====
     // numeric properties must be distinct after a ToNumber operation
     // so the below are all errors
     
     class C {
         1;
-        ~
-!!! error TS2300: Duplicate identifier '1'.
         1.0;
         ~~~
-!!! error TS2300: Duplicate identifier '1.0'.
+!!! error TS2300: Duplicate identifier '1'.
         1.;
         ~~
-!!! error TS2300: Duplicate identifier '1.'.
+!!! error TS2300: Duplicate identifier '1'.
         1.00;
         ~~~~
-!!! error TS2300: Duplicate identifier '1.00'.
+!!! error TS2300: Duplicate identifier '1'.
     }
     
     interface I {
@@ -41,13 +37,13 @@ tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(
 !!! error TS2300: Duplicate identifier '1'.
         1.0;
         ~~~
-!!! error TS2300: Duplicate identifier '1.0'.
+!!! error TS2300: Duplicate identifier '1'.
         1.;
         ~~
-!!! error TS2300: Duplicate identifier '1.'.
+!!! error TS2300: Duplicate identifier '1'.
         1.00;
         ~~~~
-!!! error TS2300: Duplicate identifier '1.00'.
+!!! error TS2300: Duplicate identifier '1'.
     }
     
     var a: {
@@ -56,19 +52,17 @@ tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(
 !!! error TS2300: Duplicate identifier '1'.
         1.0;
         ~~~
-!!! error TS2300: Duplicate identifier '1.0'.
+!!! error TS2300: Duplicate identifier '1'.
         1.;
         ~~
-!!! error TS2300: Duplicate identifier '1.'.
+!!! error TS2300: Duplicate identifier '1'.
         1.00;
         ~~~~
-!!! error TS2300: Duplicate identifier '1.00'.
+!!! error TS2300: Duplicate identifier '1'.
     }
     
     var b = {
         1: 1,
-        ~
-!!! error TS2300: Duplicate identifier '1'.
         1.0: 1,
         ~~~
 !!! error TS2300: Duplicate identifier '1.0'.
diff --git a/tests/baselines/reference/octalIntegerLiteralError.errors.txt b/tests/baselines/reference/octalIntegerLiteralError.errors.txt
index f1386f75b87..dd121198358 100644
--- a/tests/baselines/reference/octalIntegerLiteralError.errors.txt
+++ b/tests/baselines/reference/octalIntegerLiteralError.errors.txt
@@ -1,11 +1,8 @@
 tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/octalIntegerLiteralError.ts(2,19): error TS1005: ',' expected.
 tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/octalIntegerLiteralError.ts(3,18): error TS1005: ',' expected.
-tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/octalIntegerLiteralError.ts(6,5): error TS2300: Duplicate identifier '0O45436'.
-tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/octalIntegerLiteralError.ts(7,5): error TS2300: Duplicate identifier '19230'.
-tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/octalIntegerLiteralError.ts(8,5): error TS2300: Duplicate identifier '"19230"'.
 
 
-==== tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/octalIntegerLiteralError.ts (5 errors) ====
+==== tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/octalIntegerLiteralError.ts (2 errors) ====
     // error
     var oct1 = 0O13334823;
                       ~~~
@@ -16,13 +13,7 @@ tests/cases/conformance/es6/binaryAndOctalIntegerLiteral/octalIntegerLiteralErro
     
     var obj1 = {
         0O45436: "hi",
-        ~~~~~~~
-!!! error TS2300: Duplicate identifier '0O45436'.
         19230: "Hello",
-        ~~~~~
-!!! error TS2300: Duplicate identifier '19230'.
         "19230": "world",
-        ~~~~~~~
-!!! error TS2300: Duplicate identifier '"19230"'.
     };
     
\ No newline at end of file
diff --git a/tests/baselines/reference/optionalPropertiesSyntax.errors.txt b/tests/baselines/reference/optionalPropertiesSyntax.errors.txt
index f0a9995ba6f..51e49e048d5 100644
--- a/tests/baselines/reference/optionalPropertiesSyntax.errors.txt
+++ b/tests/baselines/reference/optionalPropertiesSyntax.errors.txt
@@ -5,7 +5,9 @@ tests/cases/compiler/optionalPropertiesSyntax.ts(12,5): error TS1131: Property o
 tests/cases/compiler/optionalPropertiesSyntax.ts(18,11): error TS1005: ';' expected.
 tests/cases/compiler/optionalPropertiesSyntax.ts(18,12): error TS1131: Property or signature expected.
 tests/cases/compiler/optionalPropertiesSyntax.ts(24,5): error TS2300: Duplicate identifier 'prop'.
+tests/cases/compiler/optionalPropertiesSyntax.ts(24,5): error TS2686: All declarations of 'prop' must have identical modifiers.
 tests/cases/compiler/optionalPropertiesSyntax.ts(25,5): error TS2300: Duplicate identifier 'prop'.
+tests/cases/compiler/optionalPropertiesSyntax.ts(25,5): error TS2686: All declarations of 'prop' must have identical modifiers.
 tests/cases/compiler/optionalPropertiesSyntax.ts(32,5): error TS2375: Duplicate number index signature.
 tests/cases/compiler/optionalPropertiesSyntax.ts(32,18): error TS1005: ';' expected.
 tests/cases/compiler/optionalPropertiesSyntax.ts(32,19): error TS1131: Property or signature expected.
@@ -14,7 +16,7 @@ tests/cases/compiler/optionalPropertiesSyntax.ts(33,7): error TS2375: Duplicate
 tests/cases/compiler/optionalPropertiesSyntax.ts(34,5): error TS2375: Duplicate number index signature.
 
 
-==== tests/cases/compiler/optionalPropertiesSyntax.ts (14 errors) ====
+==== tests/cases/compiler/optionalPropertiesSyntax.ts (16 errors) ====
     interface fnSigs {
         //functions signatures can be optional
         fn(): void;
@@ -53,9 +55,13 @@ tests/cases/compiler/optionalPropertiesSyntax.ts(34,5): error TS2375: Duplicate
         prop: any;
         ~~~~
 !!! error TS2300: Duplicate identifier 'prop'.
+        ~~~~
+!!! error TS2686: All declarations of 'prop' must have identical modifiers.
         prop?: any;
         ~~~~
 !!! error TS2300: Duplicate identifier 'prop'.
+        ~~~~
+!!! error TS2686: All declarations of 'prop' must have identical modifiers.
         prop2?: any;
     }
     
diff --git a/tests/baselines/reference/parameterPropertyInConstructor2.errors.txt b/tests/baselines/reference/parameterPropertyInConstructor2.errors.txt
index 5885385a20c..a99db2a39ad 100644
--- a/tests/baselines/reference/parameterPropertyInConstructor2.errors.txt
+++ b/tests/baselines/reference/parameterPropertyInConstructor2.errors.txt
@@ -1,10 +1,8 @@
 tests/cases/compiler/parameterPropertyInConstructor2.ts(3,5): error TS2394: Overload signature is not compatible with function implementation.
 tests/cases/compiler/parameterPropertyInConstructor2.ts(3,17): error TS2369: A parameter property is only allowed in a constructor implementation.
-tests/cases/compiler/parameterPropertyInConstructor2.ts(3,24): error TS2300: Duplicate identifier 'names'.
-tests/cases/compiler/parameterPropertyInConstructor2.ts(4,24): error TS2300: Duplicate identifier 'names'.
 
 
-==== tests/cases/compiler/parameterPropertyInConstructor2.ts (4 errors) ====
+==== tests/cases/compiler/parameterPropertyInConstructor2.ts (2 errors) ====
     module mod {
       class Customers {
         constructor(public names: string);
@@ -12,11 +10,7 @@ tests/cases/compiler/parameterPropertyInConstructor2.ts(4,24): error TS2300: Dup
 !!! error TS2394: Overload signature is not compatible with function implementation.
                     ~~~~~~~~~~~~~~~~~~~~
 !!! error TS2369: A parameter property is only allowed in a constructor implementation.
-                           ~~~~~
-!!! error TS2300: Duplicate identifier 'names'.
         constructor(public names: string, public ages: number) {
-                           ~~~~~
-!!! error TS2300: Duplicate identifier 'names'.
         }
       }
     }
diff --git a/tests/baselines/reference/parser0_004152.errors.txt b/tests/baselines/reference/parser0_004152.errors.txt
index dfff2ea1a09..93ac55f4c40 100644
--- a/tests/baselines/reference/parser0_004152.errors.txt
+++ b/tests/baselines/reference/parser0_004152.errors.txt
@@ -1,7 +1,6 @@
 tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,28): error TS2304: Cannot find name 'DisplayPosition'.
 tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,45): error TS1137: Expression or comma expected.
 tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,46): error TS1005: ';' expected.
-tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,48): error TS2300: Duplicate identifier '3'.
 tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,49): error TS1005: ';' expected.
 tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,51): error TS2300: Duplicate identifier '3'.
 tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,52): error TS1005: ';' expected.
@@ -11,7 +10,6 @@ tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,57): error T
 tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,58): error TS1005: ';' expected.
 tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,60): error TS2300: Duplicate identifier '3'.
 tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,61): error TS1005: ';' expected.
-tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,63): error TS2300: Duplicate identifier '0'.
 tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,64): error TS1005: ';' expected.
 tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,66): error TS2300: Duplicate identifier '3'.
 tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,67): error TS1005: ';' expected.
@@ -34,7 +32,7 @@ tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(2,97): error T
 tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(3,25): error TS2304: Cannot find name 'SeedCoords'.
 
 
-==== tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts (34 errors) ====
+==== tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts (32 errors) ====
     export class Game {
         private position = new DisplayPosition([), 3, 3, 3, 3, 3, 0, 3, 3, 3, 3, 3, 3, 0], NoMove, 0);
                                ~~~~~~~~~~~~~~~
@@ -43,8 +41,6 @@ tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(3,25): error T
 !!! error TS1137: Expression or comma expected.
                                                  ~
 !!! error TS1005: ';' expected.
-                                                   ~
-!!! error TS2300: Duplicate identifier '3'.
                                                     ~
 !!! error TS1005: ';' expected.
                                                       ~
@@ -63,8 +59,6 @@ tests/cases/conformance/parser/ecmascript5/Fuzz/parser0_004152.ts(3,25): error T
 !!! error TS2300: Duplicate identifier '3'.
                                                                 ~
 !!! error TS1005: ';' expected.
-                                                                  ~
-!!! error TS2300: Duplicate identifier '0'.
                                                                    ~
 !!! error TS1005: ';' expected.
                                                                      ~
diff --git a/tests/baselines/reference/parserComputedPropertyName5.errors.txt b/tests/baselines/reference/parserComputedPropertyName5.errors.txt
index 09c38ecbef5..51c718269fb 100644
--- a/tests/baselines/reference/parserComputedPropertyName5.errors.txt
+++ b/tests/baselines/reference/parserComputedPropertyName5.errors.txt
@@ -1,9 +1,12 @@
+tests/cases/conformance/parser/ecmascript6/ComputedPropertyNames/parserComputedPropertyName5.ts(1,11): error TS1042: 'public' modifier cannot be used here.
 tests/cases/conformance/parser/ecmascript6/ComputedPropertyNames/parserComputedPropertyName5.ts(1,22): error TS2378: A 'get' accessor must return a value.
 tests/cases/conformance/parser/ecmascript6/ComputedPropertyNames/parserComputedPropertyName5.ts(1,23): error TS2304: Cannot find name 'e'.
 
 
-==== tests/cases/conformance/parser/ecmascript6/ComputedPropertyNames/parserComputedPropertyName5.ts (2 errors) ====
+==== tests/cases/conformance/parser/ecmascript6/ComputedPropertyNames/parserComputedPropertyName5.ts (3 errors) ====
     var v = { public get [e]() { } };
+              ~~~~~~
+!!! error TS1042: 'public' modifier cannot be used here.
                          ~~~
 !!! error TS2378: A 'get' accessor must return a value.
                           ~
diff --git a/tests/baselines/reference/propertyNamedPrototype.errors.txt b/tests/baselines/reference/propertyNamedPrototype.errors.txt
deleted file mode 100644
index 6ce4054fb43..00000000000
--- a/tests/baselines/reference/propertyNamedPrototype.errors.txt
+++ /dev/null
@@ -1,10 +0,0 @@
-tests/cases/conformance/classes/propertyMemberDeclarations/propertyNamedPrototype.ts(3,12): error TS2300: Duplicate identifier 'prototype'.
-
-
-==== tests/cases/conformance/classes/propertyMemberDeclarations/propertyNamedPrototype.ts (1 errors) ====
-    class C {
-        prototype: number; // ok
-        static prototype: C; // error
-               ~~~~~~~~~
-!!! error TS2300: Duplicate identifier 'prototype'.
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/propertyNamedPrototype.symbols b/tests/baselines/reference/propertyNamedPrototype.symbols
new file mode 100644
index 00000000000..6bbd0f49e33
--- /dev/null
+++ b/tests/baselines/reference/propertyNamedPrototype.symbols
@@ -0,0 +1,11 @@
+=== tests/cases/conformance/classes/propertyMemberDeclarations/propertyNamedPrototype.ts ===
+class C {
+>C : Symbol(C, Decl(propertyNamedPrototype.ts, 0, 0))
+
+    prototype: number; // ok
+>prototype : Symbol(C.prototype, Decl(propertyNamedPrototype.ts, 0, 9))
+
+    static prototype: C; // error
+>prototype : Symbol(C.prototype, Decl(propertyNamedPrototype.ts, 1, 22))
+>C : Symbol(C, Decl(propertyNamedPrototype.ts, 0, 0))
+}
diff --git a/tests/baselines/reference/propertyNamedPrototype.types b/tests/baselines/reference/propertyNamedPrototype.types
new file mode 100644
index 00000000000..70a45d0bd49
--- /dev/null
+++ b/tests/baselines/reference/propertyNamedPrototype.types
@@ -0,0 +1,11 @@
+=== tests/cases/conformance/classes/propertyMemberDeclarations/propertyNamedPrototype.ts ===
+class C {
+>C : C
+
+    prototype: number; // ok
+>prototype : number
+
+    static prototype: C; // error
+>prototype : C
+>C : C
+}
diff --git a/tests/baselines/reference/reassignStaticProp.errors.txt b/tests/baselines/reference/reassignStaticProp.errors.txt
index bbcfe826787..7f67a6e7fc3 100644
--- a/tests/baselines/reference/reassignStaticProp.errors.txt
+++ b/tests/baselines/reference/reassignStaticProp.errors.txt
@@ -1,17 +1,17 @@
-tests/cases/compiler/reassignStaticProp.ts(3,12): error TS2300: Duplicate identifier 'bar'.
 tests/cases/compiler/reassignStaticProp.ts(5,12): error TS2300: Duplicate identifier 'bar'.
+tests/cases/compiler/reassignStaticProp.ts(5,12): error TS2403: Subsequent variable declarations must have the same type.  Variable 'bar' must be of type 'number', but here has type 'string'.
 
 
 ==== tests/cases/compiler/reassignStaticProp.ts (2 errors) ====
     class foo {
      
         static bar = 1;
-               ~~~
-!!! error TS2300: Duplicate identifier 'bar'.
      
         static bar:string; // errror - duplicate id
                ~~~
 !!! error TS2300: Duplicate identifier 'bar'.
+               ~~~
+!!! error TS2403: Subsequent variable declarations must have the same type.  Variable 'bar' must be of type 'number', but here has type 'string'.
      
     }
      
diff --git a/tests/baselines/reference/staticPrototypeProperty.errors.txt b/tests/baselines/reference/staticPrototypeProperty.errors.txt
index 19b3f3ffb20..c3f5cb99c96 100644
--- a/tests/baselines/reference/staticPrototypeProperty.errors.txt
+++ b/tests/baselines/reference/staticPrototypeProperty.errors.txt
@@ -1,8 +1,7 @@
 tests/cases/compiler/staticPrototypeProperty.ts(2,11): error TS2300: Duplicate identifier 'prototype'.
-tests/cases/compiler/staticPrototypeProperty.ts(6,11): error TS2300: Duplicate identifier 'prototype'.
 
 
-==== tests/cases/compiler/staticPrototypeProperty.ts (2 errors) ====
+==== tests/cases/compiler/staticPrototypeProperty.ts (1 errors) ====
     class C {
        static prototype() { }
               ~~~~~~~~~
@@ -11,6 +10,4 @@ tests/cases/compiler/staticPrototypeProperty.ts(6,11): error TS2300: Duplicate i
      
     class C2 {
        static prototype;
-              ~~~~~~~~~
-!!! error TS2300: Duplicate identifier 'prototype'.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/stringLiteralTypesInImplementationSignatures2.errors.txt b/tests/baselines/reference/stringLiteralTypesInImplementationSignatures2.errors.txt
index b0ab5010ea5..d7f6c182503 100644
--- a/tests/baselines/reference/stringLiteralTypesInImplementationSignatures2.errors.txt
+++ b/tests/baselines/reference/stringLiteralTypesInImplementationSignatures2.errors.txt
@@ -1,8 +1,7 @@
-tests/cases/conformance/types/objectTypeLiteral/callSignatures/stringLiteralTypesInImplementationSignatures2.ts(26,5): error TS2300: Duplicate identifier 'foo'.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/stringLiteralTypesInImplementationSignatures2.ts(27,5): error TS2300: Duplicate identifier 'foo'.
 
 
-==== tests/cases/conformance/types/objectTypeLiteral/callSignatures/stringLiteralTypesInImplementationSignatures2.ts (2 errors) ====
+==== tests/cases/conformance/types/objectTypeLiteral/callSignatures/stringLiteralTypesInImplementationSignatures2.ts (1 errors) ====
     // String literal types are only valid in overload signatures
     
     function foo(x: any);
@@ -29,8 +28,6 @@ tests/cases/conformance/types/objectTypeLiteral/callSignatures/stringLiteralType
     
     var b = {
         foo(x: 'hi') { },
-        ~~~
-!!! error TS2300: Duplicate identifier 'foo'.
         foo(x: 'a') { },
         ~~~
 !!! error TS2300: Duplicate identifier 'foo'.
diff --git a/tests/baselines/reference/stringNamedPropertyDuplicates.errors.txt b/tests/baselines/reference/stringNamedPropertyDuplicates.errors.txt
index d24ece0d126..f6ae46d9b28 100644
--- a/tests/baselines/reference/stringNamedPropertyDuplicates.errors.txt
+++ b/tests/baselines/reference/stringNamedPropertyDuplicates.errors.txt
@@ -1,57 +1,45 @@
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(2,5): error TS2300: Duplicate identifier '"a b"'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(3,5): error TS2300: Duplicate identifier '"a b"'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(4,12): error TS2300: Duplicate identifier '"c d"'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(5,12): error TS2300: Duplicate identifier '"c d"'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(9,5): error TS2300: Duplicate identifier '"a b"'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(10,5): error TS2300: Duplicate identifier '"a b"'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(14,5): error TS2300: Duplicate identifier '"a b"'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(15,5): error TS2300: Duplicate identifier '"a b"'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(19,5): error TS2300: Duplicate identifier '"a b"'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(3,5): error TS2300: Duplicate identifier 'a b'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(5,12): error TS2300: Duplicate identifier 'c d'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(9,5): error TS2300: Duplicate identifier 'a b'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(10,5): error TS2300: Duplicate identifier 'a b'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(14,5): error TS2300: Duplicate identifier 'a b'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(15,5): error TS2300: Duplicate identifier 'a b'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(20,5): error TS1005: ',' expected.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(20,5): error TS2300: Duplicate identifier '"a b"'.
 
 
-==== tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts (11 errors) ====
+==== tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts (7 errors) ====
     class C {
         "a b": number;
-        ~~~~~
-!!! error TS2300: Duplicate identifier '"a b"'.
         "a b": number;
         ~~~~~
-!!! error TS2300: Duplicate identifier '"a b"'.
+!!! error TS2300: Duplicate identifier 'a b'.
+        static "c d": number;
         static "c d": number;
                ~~~~~
-!!! error TS2300: Duplicate identifier '"c d"'.
-        static "c d": number;
-               ~~~~~
-!!! error TS2300: Duplicate identifier '"c d"'.
+!!! error TS2300: Duplicate identifier 'c d'.
     }
     
     interface I {
         "a b": number;
         ~~~~~
-!!! error TS2300: Duplicate identifier '"a b"'.
+!!! error TS2300: Duplicate identifier 'a b'.
         "a b": number;
         ~~~~~
-!!! error TS2300: Duplicate identifier '"a b"'.
+!!! error TS2300: Duplicate identifier 'a b'.
     }
     
     var a: {
         "a b": number;
         ~~~~~
-!!! error TS2300: Duplicate identifier '"a b"'.
+!!! error TS2300: Duplicate identifier 'a b'.
         "a b": number;
         ~~~~~
-!!! error TS2300: Duplicate identifier '"a b"'.
+!!! error TS2300: Duplicate identifier 'a b'.
     }
     
     var b = {
         "a b": 1
-        ~~~~~
-!!! error TS2300: Duplicate identifier '"a b"'.
         "a b": 1
         ~~~~~
 !!! error TS1005: ',' expected.
-        ~~~~~
-!!! error TS2300: Duplicate identifier '"a b"'.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/symbolProperty36.errors.txt b/tests/baselines/reference/symbolProperty36.errors.txt
index 6fe3299ab90..69102da1db3 100644
--- a/tests/baselines/reference/symbolProperty36.errors.txt
+++ b/tests/baselines/reference/symbolProperty36.errors.txt
@@ -1,12 +1,9 @@
-tests/cases/conformance/es6/Symbols/symbolProperty36.ts(2,5): error TS2300: Duplicate identifier '[Symbol.isConcatSpreadable]'.
 tests/cases/conformance/es6/Symbols/symbolProperty36.ts(3,5): error TS2300: Duplicate identifier '[Symbol.isConcatSpreadable]'.
 
 
-==== tests/cases/conformance/es6/Symbols/symbolProperty36.ts (2 errors) ====
+==== tests/cases/conformance/es6/Symbols/symbolProperty36.ts (1 errors) ====
     var x = {
         [Symbol.isConcatSpreadable]: 0,
-        ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2300: Duplicate identifier '[Symbol.isConcatSpreadable]'.
         [Symbol.isConcatSpreadable]: 1
         ~~~~~~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS2300: Duplicate identifier '[Symbol.isConcatSpreadable]'.
diff --git a/tests/baselines/reference/symbolProperty37.errors.txt b/tests/baselines/reference/symbolProperty37.errors.txt
deleted file mode 100644
index 96e10e7f2a4..00000000000
--- a/tests/baselines/reference/symbolProperty37.errors.txt
+++ /dev/null
@@ -1,13 +0,0 @@
-tests/cases/conformance/es6/Symbols/symbolProperty37.ts(2,5): error TS2300: Duplicate identifier '[Symbol.isConcatSpreadable]'.
-tests/cases/conformance/es6/Symbols/symbolProperty37.ts(3,5): error TS2300: Duplicate identifier '[Symbol.isConcatSpreadable]'.
-
-
-==== tests/cases/conformance/es6/Symbols/symbolProperty37.ts (2 errors) ====
-    interface I {
-        [Symbol.isConcatSpreadable]: string;
-        ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2300: Duplicate identifier '[Symbol.isConcatSpreadable]'.
-        [Symbol.isConcatSpreadable]: string;
-        ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2300: Duplicate identifier '[Symbol.isConcatSpreadable]'.
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/symbolProperty37.symbols b/tests/baselines/reference/symbolProperty37.symbols
new file mode 100644
index 00000000000..392bbf52c8c
--- /dev/null
+++ b/tests/baselines/reference/symbolProperty37.symbols
@@ -0,0 +1,14 @@
+=== tests/cases/conformance/es6/Symbols/symbolProperty37.ts ===
+interface I {
+>I : Symbol(I, Decl(symbolProperty37.ts, 0, 0))
+
+    [Symbol.isConcatSpreadable]: string;
+>Symbol.isConcatSpreadable : Symbol(SymbolConstructor.isConcatSpreadable, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+>Symbol : Symbol(Symbol, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --))
+>isConcatSpreadable : Symbol(SymbolConstructor.isConcatSpreadable, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+
+    [Symbol.isConcatSpreadable]: string;
+>Symbol.isConcatSpreadable : Symbol(SymbolConstructor.isConcatSpreadable, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+>Symbol : Symbol(Symbol, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --))
+>isConcatSpreadable : Symbol(SymbolConstructor.isConcatSpreadable, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+}
diff --git a/tests/baselines/reference/symbolProperty37.types b/tests/baselines/reference/symbolProperty37.types
new file mode 100644
index 00000000000..4d8482deff5
--- /dev/null
+++ b/tests/baselines/reference/symbolProperty37.types
@@ -0,0 +1,14 @@
+=== tests/cases/conformance/es6/Symbols/symbolProperty37.ts ===
+interface I {
+>I : I
+
+    [Symbol.isConcatSpreadable]: string;
+>Symbol.isConcatSpreadable : symbol
+>Symbol : SymbolConstructor
+>isConcatSpreadable : symbol
+
+    [Symbol.isConcatSpreadable]: string;
+>Symbol.isConcatSpreadable : symbol
+>Symbol : SymbolConstructor
+>isConcatSpreadable : symbol
+}
diff --git a/tests/baselines/reference/symbolProperty38.errors.txt b/tests/baselines/reference/symbolProperty38.errors.txt
deleted file mode 100644
index a519f7eb9a3..00000000000
--- a/tests/baselines/reference/symbolProperty38.errors.txt
+++ /dev/null
@@ -1,15 +0,0 @@
-tests/cases/conformance/es6/Symbols/symbolProperty38.ts(2,5): error TS2300: Duplicate identifier '[Symbol.isConcatSpreadable]'.
-tests/cases/conformance/es6/Symbols/symbolProperty38.ts(5,5): error TS2300: Duplicate identifier '[Symbol.isConcatSpreadable]'.
-
-
-==== tests/cases/conformance/es6/Symbols/symbolProperty38.ts (2 errors) ====
-    interface I {
-        [Symbol.isConcatSpreadable]: string;
-        ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2300: Duplicate identifier '[Symbol.isConcatSpreadable]'.
-    }
-    interface I {
-        [Symbol.isConcatSpreadable]: string;
-        ~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS2300: Duplicate identifier '[Symbol.isConcatSpreadable]'.
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/symbolProperty38.symbols b/tests/baselines/reference/symbolProperty38.symbols
new file mode 100644
index 00000000000..9bd7b40d9d0
--- /dev/null
+++ b/tests/baselines/reference/symbolProperty38.symbols
@@ -0,0 +1,17 @@
+=== tests/cases/conformance/es6/Symbols/symbolProperty38.ts ===
+interface I {
+>I : Symbol(I, Decl(symbolProperty38.ts, 0, 0), Decl(symbolProperty38.ts, 2, 1))
+
+    [Symbol.isConcatSpreadable]: string;
+>Symbol.isConcatSpreadable : Symbol(SymbolConstructor.isConcatSpreadable, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+>Symbol : Symbol(Symbol, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --))
+>isConcatSpreadable : Symbol(SymbolConstructor.isConcatSpreadable, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+}
+interface I {
+>I : Symbol(I, Decl(symbolProperty38.ts, 0, 0), Decl(symbolProperty38.ts, 2, 1))
+
+    [Symbol.isConcatSpreadable]: string;
+>Symbol.isConcatSpreadable : Symbol(SymbolConstructor.isConcatSpreadable, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+>Symbol : Symbol(Symbol, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --), Decl(lib.es2015.symbol.d.ts, --, --))
+>isConcatSpreadable : Symbol(SymbolConstructor.isConcatSpreadable, Decl(lib.es2015.symbol.wellknown.d.ts, --, --))
+}
diff --git a/tests/baselines/reference/symbolProperty38.types b/tests/baselines/reference/symbolProperty38.types
new file mode 100644
index 00000000000..5c3faed61f4
--- /dev/null
+++ b/tests/baselines/reference/symbolProperty38.types
@@ -0,0 +1,17 @@
+=== tests/cases/conformance/es6/Symbols/symbolProperty38.ts ===
+interface I {
+>I : I
+
+    [Symbol.isConcatSpreadable]: string;
+>Symbol.isConcatSpreadable : symbol
+>Symbol : SymbolConstructor
+>isConcatSpreadable : symbol
+}
+interface I {
+>I : I
+
+    [Symbol.isConcatSpreadable]: string;
+>Symbol.isConcatSpreadable : symbol
+>Symbol : SymbolConstructor
+>isConcatSpreadable : symbol
+}
diff --git a/tests/baselines/reference/symbolProperty44.errors.txt b/tests/baselines/reference/symbolProperty44.errors.txt
index 2cef480e736..984a20e9974 100644
--- a/tests/baselines/reference/symbolProperty44.errors.txt
+++ b/tests/baselines/reference/symbolProperty44.errors.txt
@@ -1,8 +1,9 @@
 tests/cases/conformance/es6/Symbols/symbolProperty44.ts(2,9): error TS2300: Duplicate identifier '[Symbol.hasInstance]'.
 tests/cases/conformance/es6/Symbols/symbolProperty44.ts(5,9): error TS2300: Duplicate identifier '[Symbol.hasInstance]'.
+tests/cases/conformance/es6/Symbols/symbolProperty44.ts(5,9): error TS2300: Duplicate identifier '__@hasInstance'.
 
 
-==== tests/cases/conformance/es6/Symbols/symbolProperty44.ts (2 errors) ====
+==== tests/cases/conformance/es6/Symbols/symbolProperty44.ts (3 errors) ====
     class C {
         get [Symbol.hasInstance]() {
             ~~~~~~~~~~~~~~~~~~~~
@@ -12,6 +13,8 @@ tests/cases/conformance/es6/Symbols/symbolProperty44.ts(5,9): error TS2300: Dupl
         get [Symbol.hasInstance]() {
             ~~~~~~~~~~~~~~~~~~~~
 !!! error TS2300: Duplicate identifier '[Symbol.hasInstance]'.
+            ~~~~~~~~~~~~~~~~~~~~
+!!! error TS2300: Duplicate identifier '__@hasInstance'.
             return "";
         }
     }
\ No newline at end of file
diff --git a/tests/cases/compiler/duplicateIdentifierComputedName.ts b/tests/cases/compiler/duplicateIdentifierComputedName.ts
new file mode 100644
index 00000000000..8547f85006f
--- /dev/null
+++ b/tests/cases/compiler/duplicateIdentifierComputedName.ts
@@ -0,0 +1,4 @@
+class C {
+    ["a"]: string;
+    ["a"]: string;
+}
diff --git a/tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts b/tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts
new file mode 100644
index 00000000000..67ec8e1a19f
--- /dev/null
+++ b/tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts
@@ -0,0 +1,21 @@
+// Not OK
+interface B { x; }
+interface B { x?; }
+
+// OK
+class A {
+  public y: string;
+}
+
+interface A {
+  y: string;
+}
+
+// Not OK
+class C {
+  private y: string;
+}
+
+interface C {
+  y: string;
+}
diff --git a/tests/cases/compiler/duplicateIdentifierDifferentSpelling.ts b/tests/cases/compiler/duplicateIdentifierDifferentSpelling.ts
new file mode 100644
index 00000000000..bf2b4c123fe
--- /dev/null
+++ b/tests/cases/compiler/duplicateIdentifierDifferentSpelling.ts
@@ -0,0 +1,6 @@
+class A {
+  0b11 = '';
+  3 = '';
+}
+
+var X = { 0b11: '', 3: '' };

From 3d841b20a7cf435bcf76d4ce0cb619ddd5cd32e2 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 24 May 2016 10:17:16 -0700
Subject: [PATCH 067/332] Lint unit tests via harnessSources in Jakefile.js

---
 Jakefile.js                                   |   2 +-
 .../cases/unittests/cachingInServerLSHost.ts  |  42 +-
 tests/cases/unittests/commandLineParsing.ts   |  12 +-
 .../convertCompilerOptionsFromJson.ts         |  16 +-
 tests/cases/unittests/convertToBase64.ts      |   8 +-
 .../unittests/convertTypingOptionsFromJson.ts |  10 +-
 tests/cases/unittests/incrementalParser.ts    | 680 +++++++++---------
 tests/cases/unittests/jsDocParsing.ts         |  52 +-
 tests/cases/unittests/moduleResolution.ts     | 237 +++---
 .../cases/unittests/reuseProgramStructure.ts  | 140 ++--
 .../cases/unittests/services/colorization.ts  |  35 +-
 .../unittests/services/documentRegistry.ts    |  52 +-
 .../unittests/services/patternMatcher.ts      | 138 ++--
 .../unittests/services/preProcessFile.ts      | 134 ++--
 tests/cases/unittests/session.ts              |  22 +-
 tests/cases/unittests/transpile.ts            | 174 ++---
 tests/cases/unittests/tsconfigParsing.ts      |  20 +-
 tests/cases/unittests/versionCache.ts         |  64 +-
 18 files changed, 925 insertions(+), 913 deletions(-)

diff --git a/Jakefile.js b/Jakefile.js
index 5112a8db597..0ec85b68fbe 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -974,7 +974,7 @@ var servicesLintTargets = [
     return path.join(servicesDirectory, s);
 });
 var lintTargets = compilerSources
-    .concat(harnessCoreSources)
+    .concat(harnessSources)
     // Other harness sources
     .concat(["instrumenter.ts"].map(function(f) { return path.join(harnessDirectory, f) }))
     .concat(serverCoreSources)
diff --git a/tests/cases/unittests/cachingInServerLSHost.ts b/tests/cases/unittests/cachingInServerLSHost.ts
index 17de3c6de02..5c67d6b9269 100644
--- a/tests/cases/unittests/cachingInServerLSHost.ts
+++ b/tests/cases/unittests/cachingInServerLSHost.ts
@@ -7,7 +7,7 @@ namespace ts {
     }
 
     function createDefaultServerHost(fileMap: Map<File>): server.ServerHost {
-        let existingDirectories: Map<boolean> = {};
+        const existingDirectories: Map<boolean> = {};
         forEachValue(fileMap, v => {
             let dir = getDirectoryPath(v.name);
             let previous: string;
@@ -67,7 +67,7 @@ namespace ts {
     }
 
     function createProject(rootFile: string, serverHost: server.ServerHost): { project: server.Project, rootScriptInfo: server.ScriptInfo } {
-        let logger: server.Logger = {
+        const logger: server.Logger = {
             close() { },
             isVerbose: () => false,
             loggingEnabled: () => false,
@@ -78,9 +78,9 @@ namespace ts {
             msg: (s: string, type?: string) => { }
         };
 
-        let projectService = new server.ProjectService(serverHost, logger);
-        let rootScriptInfo = projectService.openFile(rootFile, /* openedByClient */true);
-        let project = projectService.createInferredProject(rootScriptInfo);
+        const projectService = new server.ProjectService(serverHost, logger);
+        const rootScriptInfo = projectService.openFile(rootFile, /* openedByClient */true);
+        const project = projectService.createInferredProject(rootScriptInfo);
         project.setProjectOptions({ files: [rootScriptInfo.fileName], compilerOptions: { module: ts.ModuleKind.AMD } });
         return {
             project,
@@ -90,24 +90,24 @@ namespace ts {
 
     describe("Caching in LSHost", () => {
         it("works using legacy resolution logic", () => {
-            let root: File = {
+            const root: File = {
                 name: "c:/d/f0.ts",
                 content: `import {x} from "f1"`
             };
 
-            let imported: File = {
+            const imported: File = {
                 name: "c:/f1.ts",
                 content: `foo()`
             };
 
-            let serverHost = createDefaultServerHost({ [root.name]: root, [imported.name]: imported });
-            let { project, rootScriptInfo } = createProject(root.name, serverHost);
+            const serverHost = createDefaultServerHost({ [root.name]: root, [imported.name]: imported });
+            const { project, rootScriptInfo } = createProject(root.name, serverHost);
 
             // ensure that imported file was found
             let diags = project.compilerService.languageService.getSemanticDiagnostics(imported.name);
             assert.equal(diags.length, 1);
 
-            let originalFileExists = serverHost.fileExists;
+            const originalFileExists = serverHost.fileExists;
             {
                 // patch fileExists to make sure that disk is not touched
                 serverHost.fileExists = (fileName): boolean => {
@@ -115,7 +115,7 @@ namespace ts {
                     return false;
                 };
 
-                let newContent = `import {x} from "f1"
+                const newContent = `import {x} from "f1"
                 var x: string = 1;`;
                 rootScriptInfo.editContent(0, rootScriptInfo.content.length, newContent);
                 // trigger synchronization to make sure that import will be fetched from the cache
@@ -133,7 +133,7 @@ namespace ts {
                     assert.isTrue(fileName.indexOf("/f2.") !== -1);
                     return originalFileExists.call(serverHost, fileName);
                 };
-                let newContent = `import {x} from "f2"`;
+                const newContent = `import {x} from "f2"`;
                 rootScriptInfo.editContent(0, rootScriptInfo.content.length, newContent);
 
                 try {
@@ -157,7 +157,7 @@ namespace ts {
                     return originalFileExists.call(serverHost, fileName);
                 };
 
-                let newContent = `import {x} from "f1"`;
+                const newContent = `import {x} from "f1"`;
                 rootScriptInfo.editContent(0, rootScriptInfo.content.length, newContent);
                 project.compilerService.languageService.getSemanticDiagnostics(imported.name);
                 assert.isTrue(fileExistsCalled);
@@ -165,7 +165,7 @@ namespace ts {
                 // setting compiler options discards module resolution cache
                 fileExistsCalled = false;
 
-                let opts = ts.clone(project.projectOptions);
+                const opts = ts.clone(project.projectOptions);
                 opts.compilerOptions = ts.clone(opts.compilerOptions);
                 opts.compilerOptions.target = ts.ScriptTarget.ES5;
                 project.setProjectOptions(opts);
@@ -176,19 +176,19 @@ namespace ts {
         });
 
         it("loads missing files from disk", () => {
-            let root: File = {
+            const root: File = {
                 name: `c:/foo.ts`,
                 content: `import {x} from "bar"`
             };
 
-            let imported: File = {
+            const imported: File = {
                 name: `c:/bar.d.ts`,
                 content: `export var y = 1`
             };
 
-            let fileMap: Map<File> = { [root.name]: root };
-            let serverHost = createDefaultServerHost(fileMap);
-            let originalFileExists = serverHost.fileExists;
+            const fileMap: Map<File> = { [root.name]: root };
+            const serverHost = createDefaultServerHost(fileMap);
+            const originalFileExists = serverHost.fileExists;
 
             let fileExistsCalledForBar = false;
             serverHost.fileExists = fileName => {
@@ -202,7 +202,7 @@ namespace ts {
                 return originalFileExists.call(serverHost, fileName);
             };
 
-            let { project, rootScriptInfo } = createProject(root.name, serverHost);
+            const { project, rootScriptInfo } = createProject(root.name, serverHost);
 
             let diags = project.compilerService.languageService.getSemanticDiagnostics(root.name);
             assert.isTrue(fileExistsCalledForBar, "'fileExists' should be called");
@@ -219,4 +219,4 @@ namespace ts {
             assert.isTrue(diags.length === 0);
         });
     });
-}
\ No newline at end of file
+}
diff --git a/tests/cases/unittests/commandLineParsing.ts b/tests/cases/unittests/commandLineParsing.ts
index c59f6a4d78c..9b43e666f57 100644
--- a/tests/cases/unittests/commandLineParsing.ts
+++ b/tests/cases/unittests/commandLineParsing.ts
@@ -2,7 +2,7 @@
 /// <reference path="..\..\..\src\compiler\commandLineParser.ts" />
 
 namespace ts {
-    describe('parseCommandLine', () => {
+    describe("parseCommandLine", () => {
 
         function assertParseResult(commandLine: string[], expectedParsedCommandLine: ts.ParsedCommandLine) {
             const parsed = ts.parseCommandLine(commandLine);
@@ -13,9 +13,9 @@ namespace ts {
             const parsedErrors = parsed.errors;
             const expectedErrors = expectedParsedCommandLine.errors;
             assert.isTrue(parsedErrors.length === expectedErrors.length, `Expected error: ${JSON.stringify(expectedErrors)}. Actual error: ${JSON.stringify(parsedErrors)}.`);
-            for (let i = 0; i < parsedErrors.length; ++i) {
+            for (let i = 0; i < parsedErrors.length; i++) {
                 const parsedError = parsedErrors[i];
-                const expectedError = expectedErrors[i]; 
+                const expectedError = expectedErrors[i];
                 assert.equal(parsedError.code, expectedError.code);
                 assert.equal(parsedError.category, expectedError.category);
                 assert.equal(parsedError.messageText, expectedError.messageText);
@@ -24,9 +24,9 @@ namespace ts {
             const parsedFileNames = parsed.fileNames;
             const expectedFileNames = expectedParsedCommandLine.fileNames;
             assert.isTrue(parsedFileNames.length === expectedFileNames.length, `Expected fileNames: [${JSON.stringify(expectedFileNames)}]. Actual fileNames: [${JSON.stringify(parsedFileNames)}].`);
-            for (let i = 0; i < parsedFileNames.length; ++i) {
+            for (let i = 0; i < parsedFileNames.length; i++) {
                 const parsedFileName = parsedFileNames[i];
-                const expectedFileName = expectedFileNames[i]; 
+                const expectedFileName = expectedFileNames[i];
                 assert.equal(parsedFileName, expectedFileName);
             }
         }
@@ -113,7 +113,7 @@ namespace ts {
                         start: undefined,
                         length: undefined,
                     }, {
-                            messageText: "Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'", 
+                            messageText: "Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'",
                             category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category,
                             code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
 
diff --git a/tests/cases/unittests/convertCompilerOptionsFromJson.ts b/tests/cases/unittests/convertCompilerOptionsFromJson.ts
index b48d4ac451b..a686c7ec10a 100644
--- a/tests/cases/unittests/convertCompilerOptionsFromJson.ts
+++ b/tests/cases/unittests/convertCompilerOptionsFromJson.ts
@@ -2,25 +2,25 @@
 /// <reference path="..\..\..\src\compiler\commandLineParser.ts" />
 
 namespace ts {
-    describe('convertCompilerOptionsFromJson', () => {
+    describe("convertCompilerOptionsFromJson", () => {
         function assertCompilerOptions(json: any, configFileName: string, expectedResult: { compilerOptions: CompilerOptions, errors: Diagnostic[] }) {
             const { options: actualCompilerOptions, errors: actualErrors} = convertCompilerOptionsFromJson(json["compilerOptions"], "/apath/", configFileName);
-            
+
             const parsedCompilerOptions = JSON.stringify(actualCompilerOptions);
             const expectedCompilerOptions = JSON.stringify(expectedResult.compilerOptions);
             assert.equal(parsedCompilerOptions, expectedCompilerOptions);
-            
+
             const expectedErrors = expectedResult.errors;
             assert.isTrue(expectedResult.errors.length === actualErrors.length, `Expected error: ${JSON.stringify(expectedResult.errors)}. Actual error: ${JSON.stringify(actualErrors)}.`);
-            for (let i = 0; i < actualErrors.length; ++i) {
+            for (let i = 0; i < actualErrors.length; i++) {
                 const actualError = actualErrors[i];
-                const expectedError = expectedErrors[i]; 
+                const expectedError = expectedErrors[i];
                 assert.equal(actualError.code, expectedError.code);
                 assert.equal(actualError.category, expectedError.category);
                 assert.equal(actualError.messageText, expectedError.messageText);
             }
         }
-        
+
         // tsconfig.json tests
         it("Convert correctly format tsconfig.json to compiler-options ", () => {
             assertCompilerOptions(
@@ -448,7 +448,7 @@ namespace ts {
                     }
                 }, "jsconfig.json",
                 {
-                    compilerOptions: 
+                    compilerOptions:
                     {
                         allowJs: true
                     },
@@ -467,7 +467,7 @@ namespace ts {
         it("Convert default jsconfig.json to compiler-options ", () => {
             assertCompilerOptions({}, "jsconfig.json",
                 {
-                    compilerOptions: 
+                    compilerOptions:
                     {
                         allowJs: true
                     },
diff --git a/tests/cases/unittests/convertToBase64.ts b/tests/cases/unittests/convertToBase64.ts
index c73d7531c40..40fd98dd332 100644
--- a/tests/cases/unittests/convertToBase64.ts
+++ b/tests/cases/unittests/convertToBase64.ts
@@ -1,10 +1,10 @@
 /// <reference path="..\..\..\src\harness\harness.ts" />
 
-module ts {
-    describe('convertToBase64', () => {
+namespace ts {
+    describe("convertToBase64", () => {
         function runTest(input: string): void {
-            var actual = ts.convertToBase64(input);
-            var expected = new Buffer(input).toString("base64");
+            const actual = ts.convertToBase64(input);
+            const expected = new Buffer(input).toString("base64");
             assert.equal(actual, expected, "Encoded string using convertToBase64 does not match buffer.toString('base64')");
         }
 
diff --git a/tests/cases/unittests/convertTypingOptionsFromJson.ts b/tests/cases/unittests/convertTypingOptionsFromJson.ts
index 3cd15a17c61..6462794b127 100644
--- a/tests/cases/unittests/convertTypingOptionsFromJson.ts
+++ b/tests/cases/unittests/convertTypingOptionsFromJson.ts
@@ -2,18 +2,18 @@
 /// <reference path="..\..\..\src\compiler\commandLineParser.ts" />
 
 namespace ts {
-    describe('convertTypingOptionsFromJson', () => {
+    describe("convertTypingOptionsFromJson", () => {
         function assertTypingOptions(json: any, configFileName: string, expectedResult: { typingOptions: TypingOptions, errors: Diagnostic[] }) {
             const { options: actualTypingOptions, errors: actualErrors } = convertTypingOptionsFromJson(json["typingOptions"], "/apath/", configFileName);
             const parsedTypingOptions = JSON.stringify(actualTypingOptions);
             const expectedTypingOptions = JSON.stringify(expectedResult.typingOptions);
             assert.equal(parsedTypingOptions, expectedTypingOptions);
-            
+
             const expectedErrors = expectedResult.errors;
             assert.isTrue(expectedResult.errors.length === actualErrors.length, `Expected error: ${JSON.stringify(expectedResult.errors)}. Actual error: ${JSON.stringify(actualErrors)}.`);
-            for (let i = 0; i < actualErrors.length; ++i) {
+            for (let i = 0; i < actualErrors.length; i++) {
                 const actualError = actualErrors[i];
-                const expectedError = expectedErrors[i]; 
+                const expectedError = expectedErrors[i];
                 assert.equal(actualError.code, expectedError.code, `Expected error-code: ${JSON.stringify(expectedError.code)}. Actual error-code: ${JSON.stringify(actualError.code)}.`);
                 assert.equal(actualError.category, expectedError.category, `Expected error-category: ${JSON.stringify(expectedError.category)}. Actual error-category: ${JSON.stringify(actualError.category)}.`);
             }
@@ -41,7 +41,7 @@ namespace ts {
                     errors: <Diagnostic[]>[]
             });
         });
- 
+
         it("Convert incorrect format tsconfig.json to typing-options ", () => {
             assertTypingOptions(
                 {
diff --git a/tests/cases/unittests/incrementalParser.ts b/tests/cases/unittests/incrementalParser.ts
index 1ef10eaa712..0988d51e11b 100644
--- a/tests/cases/unittests/incrementalParser.ts
+++ b/tests/cases/unittests/incrementalParser.ts
@@ -1,14 +1,14 @@
 /// <reference path="..\..\..\src\harness\external\mocha.d.ts" />
 /// <reference path="..\..\..\src\compiler\parser.ts" />
 
-module ts {
+namespace ts {
     ts.disableIncrementalParsing = false;
 
     function withChange(text: IScriptSnapshot, start: number, length: number, newText: string): { text: IScriptSnapshot; textChangeRange: TextChangeRange; } {
-        var contents = text.getText(0, text.getLength());
-        var newContents = contents.substr(0, start) + newText + contents.substring(start + length);
+        const contents = text.getText(0, text.getLength());
+        const newContents = contents.substr(0, start) + newText + contents.substring(start + length);
 
-        return { text: ScriptSnapshot.fromString(newContents), textChangeRange: createTextChangeRange(createTextSpan(start, length), newText.length) }
+        return { text: ScriptSnapshot.fromString(newContents), textChangeRange: createTextChangeRange(createTextSpan(start, length), newText.length) };
     }
 
     function withInsert(text: IScriptSnapshot, start: number, newText: string): { text: IScriptSnapshot; textChangeRange: TextChangeRange; } {
@@ -20,17 +20,17 @@ module ts {
     }
 
     function createTree(text: IScriptSnapshot, version: string) {
-        return createLanguageServiceSourceFile(/*fileName:*/ "", text, ScriptTarget.Latest, version, /*setNodeParents:*/ true)
+        return createLanguageServiceSourceFile(/*fileName:*/ "", text, ScriptTarget.Latest, version, /*setNodeParents:*/ true);
     }
 
     function assertSameDiagnostics(file1: SourceFile, file2: SourceFile) {
-        var diagnostics1 = file1.parseDiagnostics;
-        var diagnostics2 = file2.parseDiagnostics;
+        const diagnostics1 = file1.parseDiagnostics;
+        const diagnostics2 = file2.parseDiagnostics;
 
         assert.equal(diagnostics1.length, diagnostics2.length, "diagnostics1.length !== diagnostics2.length");
-        for (var i = 0, n = diagnostics1.length; i < n; i++) {
-            var d1 = diagnostics1[i];
-            var d2 = diagnostics2[i];
+        for (let i = 0, n = diagnostics1.length; i < n; i++) {
+            const d1 = diagnostics1[i];
+            const d2 = diagnostics2[i];
 
             assert.equal(d1.file, file1, "d1.file !== file1");
             assert.equal(d2.file, file2, "d2.file !== file2");
@@ -52,11 +52,11 @@ module ts {
         Utils.assertInvariants(oldTree, /*parent:*/ undefined);
 
         // Create a tree for the new text, in a non-incremental fashion.
-        var newTree = createTree(newText, oldTree.version + ".");
+        const newTree = createTree(newText, oldTree.version + ".");
         Utils.assertInvariants(newTree, /*parent:*/ undefined);
 
         // Create a tree for the new text, in an incremental fashion.
-        var incrementalNewTree = updateLanguageServiceSourceFile(oldTree, newText, oldTree.version + ".", textChangeRange);
+        const incrementalNewTree = updateLanguageServiceSourceFile(oldTree, newText, oldTree.version + ".", textChangeRange);
         Utils.assertInvariants(incrementalNewTree, /*parent:*/ undefined);
 
         // We should get the same tree when doign a full or incremental parse.
@@ -72,7 +72,7 @@ module ts {
         assert.equal(newTree.text, incrementalNewTree.text, "newTree.text !== incrementalNewTree.text");
 
         if (expectedReusedElements !== -1) {
-            var actualReusedCount = reusedElements(oldTree, incrementalNewTree);
+            const actualReusedCount = reusedElements(oldTree, incrementalNewTree);
             assert.equal(actualReusedCount, expectedReusedElements, actualReusedCount + " !== " + expectedReusedElements);
         }
 
@@ -80,14 +80,14 @@ module ts {
     }
 
     function reusedElements(oldNode: SourceFile, newNode: SourceFile): number {
-        var allOldElements = collectElements(oldNode);
-        var allNewElements = collectElements(newNode);
+        const allOldElements = collectElements(oldNode);
+        const allNewElements = collectElements(newNode);
 
         return filter(allOldElements, v => contains(allNewElements, v)).length;
     }
 
     function collectElements(node: Node) {
-        var result: Node[] = [];
+        const result: Node[] = [];
         visit(node);
         return result;
 
@@ -98,12 +98,12 @@ module ts {
     }
 
     function deleteCode(source: string, index: number, toDelete: string) {
-        var repeat = toDelete.length;
-        var oldTree = createTree(ScriptSnapshot.fromString(source), /*version:*/ ".");
-        for (var i = 0; i < repeat; i++) {
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withDelete(oldText, index, 1);
-            var newTree = compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, -1, oldTree);
+        const repeat = toDelete.length;
+        let oldTree = createTree(ScriptSnapshot.fromString(source), /*version:*/ ".");
+        for (let i = 0; i < repeat; i++) {
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withDelete(oldText, index, 1);
+            const newTree = compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, -1, oldTree);
 
             source = newTextAndChange.text.getText(0, newTextAndChange.text.getLength());
             oldTree = newTree;
@@ -111,21 +111,21 @@ module ts {
     }
 
     function insertCode(source: string, index: number, toInsert: string) {
-        var repeat = toInsert.length;
-        var oldTree = createTree(ScriptSnapshot.fromString(source), /*version:*/ ".");
-        for (var i = 0; i < repeat; i++) {
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, index + i, toInsert.charAt(i));
-            var newTree = compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, -1, oldTree);
+        const repeat = toInsert.length;
+        let oldTree = createTree(ScriptSnapshot.fromString(source), /*version:*/ ".");
+        for (let i = 0; i < repeat; i++) {
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, index + i, toInsert.charAt(i));
+            const newTree = compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, -1, oldTree);
 
             source = newTextAndChange.text.getText(0, newTextAndChange.text.getLength());
             oldTree = newTree;
         }
     }
 
-    describe('Incremental',() => {
-        it('Inserting into method',() => {
-            var source = "class C {\r\n" +
+    describe("Incremental", () => {
+        it("Inserting into method", () => {
+            const source = "class C {\r\n" +
                 "    public foo1() { }\r\n" +
                 "    public foo2() {\r\n" +
                 "        return 1;\r\n" +
@@ -133,15 +133,15 @@ module ts {
                 "    public foo3() { }\r\n" +
                 "}";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var semicolonIndex = source.indexOf(";");
-            var newTextAndChange = withInsert(oldText, semicolonIndex, " + 1");
+            const oldText = ScriptSnapshot.fromString(source);
+            const semicolonIndex = source.indexOf(";");
+            const newTextAndChange = withInsert(oldText, semicolonIndex, " + 1");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 8);
         });
 
-        it('Deleting from method',() => {
-            var source = "class C {\r\n" +
+        it("Deleting from method", () => {
+            const source = "class C {\r\n" +
                 "    public foo1() { }\r\n" +
                 "    public foo2() {\r\n" +
                 "        return 1 + 1;\r\n" +
@@ -149,424 +149,424 @@ module ts {
                 "    public foo3() { }\r\n" +
                 "}";
 
-            var index = source.indexOf("+ 1");
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withDelete(oldText, index, "+ 1".length);
+            const index = source.indexOf("+ 1");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withDelete(oldText, index, "+ 1".length);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 8);
         });
 
-        it('Regular expression 1',() => {
-            var source = "class C { public foo1() { /; } public foo2() { return 1;} public foo3() { } }";
+        it("Regular expression 1", () => {
+            const source = "class C { public foo1() { /; } public foo2() { return 1;} public foo3() { } }";
 
-            var semicolonIndex = source.indexOf(";}");
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, semicolonIndex, "/");
+            const semicolonIndex = source.indexOf(";}");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, semicolonIndex, "/");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Regular expression 2',() => {
-            var source = "class C { public foo1() { ; } public foo2() { return 1/;} public foo3() { } }";
+        it("Regular expression 2", () => {
+            const source = "class C { public foo1() { ; } public foo2() { return 1/;} public foo3() { } }";
 
-            var semicolonIndex = source.indexOf(";");
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, semicolonIndex, "/");
+            const semicolonIndex = source.indexOf(";");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, semicolonIndex, "/");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 4);
         });
 
-        it('Comment 1',() => {
-            var source = "class C { public foo1() { /; } public foo2() { return 1; } public foo3() { } }";
+        it("Comment 1", () => {
+            const source = "class C { public foo1() { /; } public foo2() { return 1; } public foo3() { } }";
 
-            var semicolonIndex = source.indexOf(";");
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, semicolonIndex, "/");
+            const semicolonIndex = source.indexOf(";");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, semicolonIndex, "/");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Comment 2',() => {
-            var source = "class C { public foo1() { /; } public foo2() { return 1; } public foo3() { } }";
+        it("Comment 2", () => {
+            const source = "class C { public foo1() { /; } public foo2() { return 1; } public foo3() { } }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, 0, "//");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, 0, "//");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Comment 3',() => {
-            var source = "//class C { public foo1() { /; } public foo2() { return 1; } public foo3() { } }";
+        it("Comment 3", () => {
+            const source = "//class C { public foo1() { /; } public foo2() { return 1; } public foo3() { } }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withDelete(oldText, 0, 2);
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withDelete(oldText, 0, 2);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Comment 4',() => {
-            var source = "class C { public foo1() { /; } public foo2() { */ return 1; } public foo3() { } }";
+        it("Comment 4", () => {
+            const source = "class C { public foo1() { /; } public foo2() { */ return 1; } public foo3() { } }";
 
-            var index = source.indexOf(";");
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, index, "*");
+            const index = source.indexOf(";");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, index, "*");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 4);
         });
 
-        it('Parameter 1',() => {
+        it("Parameter 1", () => {
             // Should be able to reuse all the parameters.
-            var source = "class C {\r\n" +
+            const source = "class C {\r\n" +
                 "    public foo2(a, b, c, d) {\r\n" +
                 "        return 1;\r\n" +
                 "    }\r\n" +
                 "}";
 
-            var semicolonIndex = source.indexOf(";");
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, semicolonIndex, " + 1");
+            const semicolonIndex = source.indexOf(";");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, semicolonIndex, " + 1");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 8);
         });
 
-        it('Type member 1',() => {
+        it("Type member 1", () => {
             // Should be able to reuse most of the type members.
-            var source = "interface I { a: number; b: string; (c): d; new (e): f; g(): h }";
+            const source = "interface I { a: number; b: string; (c): d; new (e): f; g(): h }";
 
-            var index = source.indexOf(": string");
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, index, "?");
+            const index = source.indexOf(": string");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, index, "?");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 14);
         });
 
-        it('Enum element 1',() => {
+        it("Enum element 1", () => {
             // Should be able to reuse most of the enum elements.
-            var source = "enum E { a = 1, b = 1 << 1, c = 3, e = 4, f = 5, g = 7, h = 8, i = 9, j = 10 }";
+            const source = "enum E { a = 1, b = 1 << 1, c = 3, e = 4, f = 5, g = 7, h = 8, i = 9, j = 10 }";
 
-            var index = source.indexOf("<<");
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, index, 2, "+");
+            const index = source.indexOf("<<");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, index, 2, "+");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 24);
         });
 
-        it('Strict mode 1',() => {
-            var source = "foo1();\r\nfoo1();\r\nfoo1();\r\package();";
+        it("Strict mode 1", () => {
+            const source = "foo1();\r\nfoo1();\r\nfoo1();\r\package();";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, 0, "'strict';\r\n");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, 0, "'strict';\r\n");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 9);
         });
 
-        it('Strict mode 2',() => {
-            var source = "foo1();\r\nfoo1();\r\nfoo1();\r\package();";
+        it("Strict mode 2", () => {
+            const source = "foo1();\r\nfoo1();\r\nfoo1();\r\package();";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, 0, "'use strict';\r\n");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, 0, "'use strict';\r\n");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 9);
         });
 
-        it('Strict mode 3',() => {
-            var source = "'strict';\r\nfoo1();\r\nfoo1();\r\nfoo1();\r\npackage();";
+        it("Strict mode 3", () => {
+            const source = "'strict';\r\nfoo1();\r\nfoo1();\r\nfoo1();\r\npackage();";
 
-            var index = source.indexOf('f');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withDelete(oldText, 0, index);
+            const index = source.indexOf("f");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withDelete(oldText, 0, index);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 9);
         });
 
-        it('Strict mode 4',() => {
-            var source = "'use strict';\r\nfoo1();\r\nfoo1();\r\nfoo1();\r\npackage();";
+        it("Strict mode 4", () => {
+            const source = "'use strict';\r\nfoo1();\r\nfoo1();\r\nfoo1();\r\npackage();";
 
-            var index = source.indexOf('f');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withDelete(oldText, 0, index);
+            const index = source.indexOf("f");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withDelete(oldText, 0, index);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 9);
         });
 
-        it('Strict mode 5',() => {
-            var source = "'use blahhh';\r\nfoo1();\r\nfoo2();\r\nfoo3();\r\nfoo4();\r\nfoo4();\r\nfoo6();\r\nfoo7();\r\nfoo8();\r\nfoo9();\r\n";
+        it("Strict mode 5", () => {
+            const source = "'use blahhh';\r\nfoo1();\r\nfoo2();\r\nfoo3();\r\nfoo4();\r\nfoo4();\r\nfoo6();\r\nfoo7();\r\nfoo8();\r\nfoo9();\r\n";
 
-            var index = source.indexOf('b');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, index, 6, "strict");
+            const index = source.indexOf("b");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, index, 6, "strict");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 27);
         });
 
-        it('Strict mode 6',() => {
-            var source = "'use strict';\r\nfoo1();\r\nfoo2();\r\nfoo3();\r\nfoo4();\r\nfoo4();\r\nfoo6();\r\nfoo7();\r\nfoo8();\r\nfoo9();\r\n";
+        it("Strict mode 6", () => {
+            const source = "'use strict';\r\nfoo1();\r\nfoo2();\r\nfoo3();\r\nfoo4();\r\nfoo4();\r\nfoo6();\r\nfoo7();\r\nfoo8();\r\nfoo9();\r\n";
 
-            var index = source.indexOf('s');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, index, 6, "blahhh");
+            const index = source.indexOf("s");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, index, 6, "blahhh");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 27);
         });
 
-        it('Strict mode 7',() => {
-            var source = "'use blahhh';\r\nfoo1();\r\nfoo2();\r\nfoo3();\r\nfoo4();\r\nfoo4();\r\nfoo6();\r\nfoo7();\r\nfoo8();\r\nfoo9();\r\n";
+        it("Strict mode 7", () => {
+            const source = "'use blahhh';\r\nfoo1();\r\nfoo2();\r\nfoo3();\r\nfoo4();\r\nfoo4();\r\nfoo6();\r\nfoo7();\r\nfoo8();\r\nfoo9();\r\n";
 
-            var index = source.indexOf('f');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withDelete(oldText, 0, index);
+            const index = source.indexOf("f");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withDelete(oldText, 0, index);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 24);
         });
 
-        it('Parenthesized expression to arrow function 1',() => {
-            var source = "var v = (a, b, c, d, e)";
+        it("Parenthesized expression to arrow function 1", () => {
+            const source = "var v = (a, b, c, d, e)";
 
-            var index = source.indexOf('a');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, index + 1, ":");
+            const index = source.indexOf("a");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, index + 1, ":");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Parenthesized expression to arrow function 2',() => {
-            var source = "var v = (a, b) = c";
+        it("Parenthesized expression to arrow function 2", () => {
+            const source = "var v = (a, b) = c";
 
-            var index = source.indexOf("= c") + 1;
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, index, ">");
+            const index = source.indexOf("= c") + 1;
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, index, ">");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Arrow function to parenthesized expression 1',() => {
-            var source = "var v = (a:, b, c, d, e)";
+        it("Arrow function to parenthesized expression 1", () => {
+            const source = "var v = (a:, b, c, d, e)";
 
-            var index = source.indexOf(':');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withDelete(oldText, index, 1);
+            const index = source.indexOf(":");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withDelete(oldText, index, 1);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Arrow function to parenthesized expression 2',() => {
-            var source = "var v = (a, b) => c";
+        it("Arrow function to parenthesized expression 2", () => {
+            const source = "var v = (a, b) => c";
 
-            var index = source.indexOf(">");
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withDelete(oldText, index, 1);
+            const index = source.indexOf(">");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withDelete(oldText, index, 1);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Speculative generic lookahead 1',() => {
-            var source = "var v = F<b>e";
+        it("Speculative generic lookahead 1", () => {
+            const source = "var v = F<b>e";
 
-            var index = source.indexOf('b');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, index + 1, ",x");
+            const index = source.indexOf("b");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, index + 1, ",x");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, -1);
         });
 
-        it('Speculative generic lookahead 2',() => {
-            var source = "var v = F<a,b>e";
+        it("Speculative generic lookahead 2", () => {
+            const source = "var v = F<a,b>e";
 
-            var index = source.indexOf('b');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, index + 1, ",x");
+            const index = source.indexOf("b");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, index + 1, ",x");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, -1);
         });
 
-        it('Speculative generic lookahead 3',() => {
-            var source = "var v = F<a,b,c>e";
+        it("Speculative generic lookahead 3", () => {
+            const source = "var v = F<a,b,c>e";
 
-            var index = source.indexOf('b');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, index + 1, ",x");
+            const index = source.indexOf("b");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, index + 1, ",x");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, -1);
         });
 
-        it('Speculative generic lookahead 4',() => {
-            var source = "var v = F<a,b,c,d>e";
+        it("Speculative generic lookahead 4", () => {
+            const source = "var v = F<a,b,c,d>e";
 
-            var index = source.indexOf('b');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, index + 1, ",x");
+            const index = source.indexOf("b");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, index + 1, ",x");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, -1);
         });
 
-        it('Assertion to arrow function',() => {
-            var source = "var v = <T>(a);";
+        it("Assertion to arrow function", () => {
+            const source = "var v = <T>(a);";
 
-            var index = source.indexOf(';');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, index, " => 1");
+            const index = source.indexOf(";");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, index, " => 1");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Arrow function to assertion',() => {
-            var source = "var v = <T>(a) => 1;";
+        it("Arrow function to assertion", () => {
+            const source = "var v = <T>(a) => 1;";
 
-            var index = source.indexOf(' =>');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withDelete(oldText, index, " => 1".length);
+            const index = source.indexOf(" =>");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withDelete(oldText, index, " => 1".length);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Contextual shift to shift-equals',() => {
-            var source = "var v = 1 >> = 2";
+        it("Contextual shift to shift-equals", () => {
+            const source = "var v = 1 >> = 2";
 
-            var index = source.indexOf('>> =');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withDelete(oldText, index + 2, 1);
+            const index = source.indexOf(">> =");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withDelete(oldText, index + 2, 1);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Contextual shift-equals to shift',() => {
-            var source = "var v = 1 >>= 2";
+        it("Contextual shift-equals to shift", () => {
+            const source = "var v = 1 >>= 2";
 
-            var index = source.indexOf('>>=');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, index + 2, " ");
+            const index = source.indexOf(">>=");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, index + 2, " ");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Contextual shift to generic invocation',() => {
-            var source = "var v = T>>(2)";
+        it("Contextual shift to generic invocation", () => {
+            const source = "var v = T>>(2)";
 
-            var index = source.indexOf('T');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, index, "Foo<Bar<");
+            const index = source.indexOf("T");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, index, "Foo<Bar<");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Test generic invocation to contextual shift',() => {
-            var source = "var v = Foo<Bar<T>>(2)";
+        it("Test generic invocation to contextual shift", () => {
+            const source = "var v = Foo<Bar<T>>(2)";
 
-            var index = source.indexOf('Foo<Bar<');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withDelete(oldText, index, "Foo<Bar<".length);
+            const index = source.indexOf("Foo<Bar<");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withDelete(oldText, index, "Foo<Bar<".length);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Contextual shift to generic type and initializer',() => {
-            var source = "var v = T>>=2;";
+        it("Contextual shift to generic type and initializer", () => {
+            const source = "var v = T>>=2;";
 
-            var index = source.indexOf('=');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, index, "= ".length, ": Foo<Bar<");
+            const index = source.indexOf("=");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, index, "= ".length, ": Foo<Bar<");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Generic type and initializer to contextual shift',() => {
-            var source = "var v : Foo<Bar<T>>=2;";
+        it("Generic type and initializer to contextual shift", () => {
+            const source = "var v : Foo<Bar<T>>=2;";
 
-            var index = source.indexOf(':');
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, index, ": Foo<Bar<".length, "= ");
+            const index = source.indexOf(":");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, index, ": Foo<Bar<".length, "= ");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Arithmetic operator to type argument list',() => {
-            var source = "var v = new Dictionary<A, B>0";
+        it("Arithmetic operator to type argument list", () => {
+            const source = "var v = new Dictionary<A, B>0";
 
-            var index = source.indexOf("0");
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, index, 1, "()");
+            const index = source.indexOf("0");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, index, 1, "()");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Type argument list to arithmetic operator',() => {
-            var source = "var v = new Dictionary<A, B>()";
+        it("Type argument list to arithmetic operator", () => {
+            const source = "var v = new Dictionary<A, B>()";
 
-            var index = source.indexOf("()");
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withDelete(oldText, index, 2);
+            const index = source.indexOf("()");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withDelete(oldText, index, 2);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Yield context 1',() => {
+        it("Yield context 1", () => {
             // We're changing from a non-generator to a genarator.  We can't reuse statement nodes.
-            var source = "function foo() {\r\nyield(foo1);\r\n}";
+            const source = "function foo() {\r\nyield(foo1);\r\n}";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var index = source.indexOf("foo");
-            var newTextAndChange = withInsert(oldText, index, "*");
+            const oldText = ScriptSnapshot.fromString(source);
+            const index = source.indexOf("foo");
+            const newTextAndChange = withInsert(oldText, index, "*");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Yield context 2',() => {
+        it("Yield context 2", () => {
             // We're changing from a generator to a non-genarator.  We can't reuse statement nodes.
-            var source = "function *foo() {\r\nyield(foo1);\r\n}";
+            const source = "function *foo() {\r\nyield(foo1);\r\n}";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var index = source.indexOf("*");
-            var newTextAndChange = withDelete(oldText, index, "*".length);
+            const oldText = ScriptSnapshot.fromString(source);
+            const index = source.indexOf("*");
+            const newTextAndChange = withDelete(oldText, index, "*".length);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Delete semicolon',() => {
-            var source = "export class Foo {\r\n}\r\n\r\nexport var foo = new Foo();\r\n\r\n    export function test(foo: Foo) {\r\n        return true;\r\n    }\r\n";
+        it("Delete semicolon", () => {
+            const source = "export class Foo {\r\n}\r\n\r\nexport var foo = new Foo();\r\n\r\n    export function test(foo: Foo) {\r\n        return true;\r\n    }\r\n";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var index = source.lastIndexOf(";");
-            var newTextAndChange = withDelete(oldText, index, 1);
+            const oldText = ScriptSnapshot.fromString(source);
+            const index = source.lastIndexOf(";");
+            const newTextAndChange = withDelete(oldText, index, 1);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 14);
         });
 
-        it('Edit after empty type parameter list',() => {
-            var source = "class Dictionary<> { }\r\nvar y;\r\n";
+        it("Edit after empty type parameter list", () => {
+            const source = "class Dictionary<> { }\r\nvar y;\r\n";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var index = source.length;
-            var newTextAndChange = withInsert(oldText, index, "var x;");
+            const oldText = ScriptSnapshot.fromString(source);
+            const index = source.length;
+            const newTextAndChange = withInsert(oldText, index, "var x;");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 2);
         });
 
-        it('Delete parameter after comment',() => {
-            var source = "function fn(/* comment! */ a: number, c) { }";
+        it("Delete parameter after comment", () => {
+            const source = "function fn(/* comment! */ a: number, c) { }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var index = source.indexOf("a:");
-            var newTextAndChange = withDelete(oldText, index, "a: number,".length);
+            const oldText = ScriptSnapshot.fromString(source);
+            const index = source.indexOf("a:");
+            const newTextAndChange = withDelete(oldText, index, "a: number,".length);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Modifier added to accessor',() => {
-            var source =
+        it("Modifier added to accessor", () => {
+            const source =
                 "class C {\
     set Bar(bar:string) {}\
 }\
 var o2 = { set Foo(val:number) { } };";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var index = source.indexOf("set");
-            var newTextAndChange = withInsert(oldText, index, "public ");
+            const oldText = ScriptSnapshot.fromString(source);
+            const index = source.indexOf("set");
+            const newTextAndChange = withInsert(oldText, index, "public ");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 14);
         });
 
-        it('Insert parameter ahead of parameter',() => {
-            var source =
+        it("Insert parameter ahead of parameter", () => {
+            const source =
                 "alert(100);\
 \
 class OverloadedMonster {\
@@ -574,239 +574,239 @@ constructor();\
 constructor(name) { }\
 }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var index = source.indexOf("100");
-            var newTextAndChange = withInsert(oldText, index, "'1', ");
+            const oldText = ScriptSnapshot.fromString(source);
+            const index = source.indexOf("100");
+            const newTextAndChange = withInsert(oldText, index, "'1', ");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 7);
         });
 
-        it('Insert declare modifier before module',() => {
-            var source =
+        it("Insert declare modifier before module", () => {
+            const source =
                 "module mAmbient {\
 module m3 { }\
 }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var index = 0;
-            var newTextAndChange = withInsert(oldText, index, "declare ");
+            const oldText = ScriptSnapshot.fromString(source);
+            const index = 0;
+            const newTextAndChange = withInsert(oldText, index, "declare ");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 3);
         });
 
-        it('Insert function above arrow function with comment',() => {
-            var source =
+        it("Insert function above arrow function with comment", () => {
+            const source =
                 "\
 () =>\
    // do something\
 0;";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var index = 0;
-            var newTextAndChange = withInsert(oldText, index, "function Foo() { }");
+            const oldText = ScriptSnapshot.fromString(source);
+            const index = 0;
+            const newTextAndChange = withInsert(oldText, index, "function Foo() { }");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Finish incomplete regular expression',() => {
-            var source = "while (true) /3; return;"
+        it("Finish incomplete regular expression", () => {
+            const source = "while (true) /3; return;";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var index = source.length - 1;
-            var newTextAndChange = withInsert(oldText, index, "/");
+            const oldText = ScriptSnapshot.fromString(source);
+            const index = source.length - 1;
+            const newTextAndChange = withInsert(oldText, index, "/");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Regular expression to divide operation',() => {
-            var source = "return;\r\nwhile (true) /3/g;"
+        it("Regular expression to divide operation", () => {
+            const source = "return;\r\nwhile (true) /3/g;";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var index = source.indexOf("while");
-            var newTextAndChange = withDelete(oldText, index, "while ".length);
+            const oldText = ScriptSnapshot.fromString(source);
+            const index = source.indexOf("while");
+            const newTextAndChange = withDelete(oldText, index, "while ".length);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Divide operation to regular expression',() => {
-            var source = "return;\r\n(true) /3/g;"
+        it("Divide operation to regular expression", () => {
+            const source = "return;\r\n(true) /3/g;";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var index = source.indexOf("(");
-            var newTextAndChange = withInsert(oldText, index, "while ");
+            const oldText = ScriptSnapshot.fromString(source);
+            const index = source.indexOf("(");
+            const newTextAndChange = withInsert(oldText, index, "while ");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Unterminated comment after keyword converted to identifier',() => {
+        it("Unterminated comment after keyword converted to identifier", () => {
             // 'public' as a keyword should be incrementally unusable (because it has an 
             // unterminated comment).  When we convert it to an identifier, that shouldn't
             // change anything, and we should still get the same errors.
-            var source = "return; a.public /*"
+            const source = "return; a.public /*";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, 0, "");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, 0, "");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 8);
         });
 
-        it('Class to interface',() => {
-            var source = "class A { public M1() { } public M2() { } public M3() { } p1 = 0; p2 = 0; p3 = 0 }"
+        it("Class to interface", () => {
+            const source = "class A { public M1() { } public M2() { } public M3() { } p1 = 0; p2 = 0; p3 = 0 }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 0, "class".length, "interface");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 0, "class".length, "interface");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Interface to class',() => {
-            var source = "interface A { M1?(); M2?(); M3?(); p1?; p2?; p3? }"
+        it("Interface to class", () => {
+            const source = "interface A { M1?(); M2?(); M3?(); p1?; p2?; p3? }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 0, "interface".length, "class");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 0, "interface".length, "class");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Surrounding function declarations with block',() => {
-            var source = "declare function F1() { } export function F2() { } declare export function F3() { }"
+        it("Surrounding function declarations with block", () => {
+            const source = "declare function F1() { } export function F2() { } declare export function F3() { }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withInsert(oldText, 0, "{");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withInsert(oldText, 0, "{");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 9);
         });
 
-        it('Removing block around function declarations',() => {
-            var source = "{ declare function F1() { } export function F2() { } declare export function F3() { }"
+        it("Removing block around function declarations", () => {
+            const source = "{ declare function F1() { } export function F2() { } declare export function F3() { }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withDelete(oldText, 0, "{".length);
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withDelete(oldText, 0, "{".length);
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 9);
         });
 
-        it('Moving methods from class to object literal',() => {
-            var source = "class C { public A() { } public B() { } public C() { } }"
+        it("Moving methods from class to object literal", () => {
+            const source = "class C { public A() { } public B() { } public C() { } }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 0, "class C".length, "var v =");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 0, "class C".length, "var v =");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Moving methods from object literal to class',() => {
-            var source = "var v = { public A() { } public B() { } public C() { } }"
+        it("Moving methods from object literal to class", () => {
+            const source = "var v = { public A() { } public B() { } public C() { } }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 0, "var v =".length, "class C");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 0, "var v =".length, "class C");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 4);
         });
 
-        it('Moving methods from object literal to class in strict mode', () => {
-            var source = "\"use strict\"; var v = { public A() { } public B() { } public C() { } }"
+        it("Moving methods from object literal to class in strict mode", () => {
+            const source = "\"use strict\"; var v = { public A() { } public B() { } public C() { } }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 14, "var v =".length, "class C");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 14, "var v =".length, "class C");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 4);
         });
 
-        it('Do not move constructors from class to object-literal.', () => {
-            var source = "class C { public constructor() { } public constructor() { } public constructor() { } }"
+        it("Do not move constructors from class to object-literal.", () => {
+            const source = "class C { public constructor() { } public constructor() { } public constructor() { } }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 0, "class C".length, "var v =");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 0, "class C".length, "var v =");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Do not move methods called "constructor" from object literal to class', () => {
-            var source = "var v = { public constructor() { } public constructor() { } public constructor() { } }"
+        it("Do not move methods called \"constructor\" from object literal to class", () => {
+            const source = "var v = { public constructor() { } public constructor() { } public constructor() { } }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 0, "var v =".length, "class C");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 0, "var v =".length, "class C");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Moving index signatures from class to interface',() => {
-            var source = "class C { public [a: number]: string; public [a: number]: string; public [a: number]: string }"
+        it("Moving index signatures from class to interface", () => {
+            const source = "class C { public [a: number]: string; public [a: number]: string; public [a: number]: string }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 0, "class".length, "interface");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 0, "class".length, "interface");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 18);
         });
 
-        it('Moving index signatures from class to interface in strict mode', () => {
-            var source = "\"use strict\"; class C { public [a: number]: string; public [a: number]: string; public [a: number]: string }"
+        it("Moving index signatures from class to interface in strict mode", () => {
+            const source = "\"use strict\"; class C { public [a: number]: string; public [a: number]: string; public [a: number]: string }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 14, "class".length, "interface");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 14, "class".length, "interface");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 18);
         });
 
-        it('Moving index signatures from interface to class',() => {
-            var source = "interface C { public [a: number]: string; public [a: number]: string; public [a: number]: string }"
+        it("Moving index signatures from interface to class", () => {
+            const source = "interface C { public [a: number]: string; public [a: number]: string; public [a: number]: string }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 0, "interface".length, "class");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 0, "interface".length, "class");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 18);
         });
 
 
-        it('Moving index signatures from interface to class in strict mode', () => {
-            var source = "\"use strict\"; interface C { public [a: number]: string; public [a: number]: string; public [a: number]: string }"
+        it("Moving index signatures from interface to class in strict mode", () => {
+            const source = "\"use strict\"; interface C { public [a: number]: string; public [a: number]: string; public [a: number]: string }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 14, "interface".length, "class");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 14, "interface".length, "class");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 18);
         });
 
-        it('Moving accessors from class to object literal',() => {
-            var source = "class C { public get A() { } public get B() { } public get C() { } }"
+        it("Moving accessors from class to object literal", () => {
+            const source = "class C { public get A() { } public get B() { } public get C() { } }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 0, "class C".length, "var v =");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 0, "class C".length, "var v =");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 0);
         });
 
-        it('Moving accessors from object literal to class',() => {
-            var source = "var v = { public get A() { } public get B() { } public get C() { } }"
+        it("Moving accessors from object literal to class", () => {
+            const source = "var v = { public get A() { } public get B() { } public get C() { } }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 0, "var v =".length, "class C");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 0, "var v =".length, "class C");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 4);
         });
 
 
-        it('Moving accessors from object literal to class in strict mode', () => {
-            var source = "\"use strict\"; var v = { public get A() { } public get B() { } public get C() { } }"
+        it("Moving accessors from object literal to class in strict mode", () => {
+            const source = "\"use strict\"; var v = { public get A() { } public get B() { } public get C() { } }";
 
-            var oldText = ScriptSnapshot.fromString(source);
-            var newTextAndChange = withChange(oldText, 14, "var v =".length, "class C");
+            const oldText = ScriptSnapshot.fromString(source);
+            const newTextAndChange = withChange(oldText, 14, "var v =".length, "class C");
 
             compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 4);
         });
 
         // Simulated typing tests.
 
-        it('Type extends clause 1',() => {
-            var source = "interface IFoo<T> { }\r\ninterface Array<T> extends IFoo<T> { }";
+        it("Type extends clause 1", () => {
+            const source = "interface IFoo<T> { }\r\ninterface Array<T> extends IFoo<T> { }";
 
-            var index = source.indexOf('extends');
+            const index = source.indexOf("extends");
             deleteCode(source, index, "extends IFoo<T>");
         });
 
-        it('Type after incomplete enum 1',() => {
-            var source = "function foo() {\r\n" +
+        it("Type after incomplete enum 1", () => {
+            const source = "function foo() {\r\n" +
                 "            function getOccurrencesAtPosition() {\r\n" +
                 "            switch (node) {\r\n" +
                 "                enum \r\n" +
@@ -823,8 +823,8 @@ module m3 { }\
                 "            };\r\n" +
                 "        }";
 
-            var index = source.indexOf("enum ") + "enum ".length;
+            const index = source.indexOf("enum ") + "enum ".length;
             insertCode(source, index, "Fo");
         });
     });
-}
\ No newline at end of file
+}
diff --git a/tests/cases/unittests/jsDocParsing.ts b/tests/cases/unittests/jsDocParsing.ts
index 1bd7b1147ca..22f679c4ad5 100644
--- a/tests/cases/unittests/jsDocParsing.ts
+++ b/tests/cases/unittests/jsDocParsing.ts
@@ -3,20 +3,20 @@
 /// <reference path="..\..\..\src\compiler\parser.ts" />
 /// <reference path="..\..\..\src\harness\harness.ts" />
 
-module ts {
+namespace ts {
     describe("JSDocParsing", () => {
         describe("TypeExpressions", () => {
             function parsesCorrectly(content: string, expected: string) {
-                let typeAndDiagnostics = ts.parseJSDocTypeExpressionForTests(content);
+                const typeAndDiagnostics = ts.parseJSDocTypeExpressionForTests(content);
                 assert.isTrue(typeAndDiagnostics && typeAndDiagnostics.diagnostics.length === 0);
 
-                let result = Utils.sourceFileToJSON(typeAndDiagnostics.jsDocTypeExpression.type);
+                const result = Utils.sourceFileToJSON(typeAndDiagnostics.jsDocTypeExpression.type);
 
                 assert.equal(result, expected);
             }
 
             function parsesIncorrectly(content: string) {
-                let type = ts.parseJSDocTypeExpressionForTests(content);
+                const type = ts.parseJSDocTypeExpressionForTests(content);
                 assert.isTrue(!type || type.diagnostics.length > 0);
             }
 
@@ -50,7 +50,7 @@ module ts {
         "pos": 2,
         "end": 8
     }
-}`)
+}`);
                 });
 
                 it("nullableType2", () => {
@@ -64,7 +64,7 @@ module ts {
         "pos": 1,
         "end": 7
     }
-}`)
+}`);
                 });
 
                 it("nonNullableType", () => {
@@ -78,7 +78,7 @@ module ts {
         "pos": 2,
         "end": 8
     }
-}`)
+}`);
                 });
 
                 it("nonNullableType2", () => {
@@ -92,7 +92,7 @@ module ts {
         "pos": 1,
         "end": 7
     }
-}`)
+}`);
                 });
 
                 it("recordType1", () => {
@@ -106,7 +106,7 @@ module ts {
         "pos": 2,
         "end": 2
     }
-}`)
+}`);
                 });
 
                 it("recordType2", () => {
@@ -131,7 +131,7 @@ module ts {
         "pos": 2,
         "end": 5
     }
-}`)
+}`);
                 });
 
                 it("recordType3", () => {
@@ -161,7 +161,7 @@ module ts {
         "pos": 2,
         "end": 13
     }
-}`)
+}`);
                 });
 
                 it("recordType4", () => {
@@ -197,7 +197,7 @@ module ts {
         "pos": 2,
         "end": 10
     }
-}`)
+}`);
                 });
 
                 it("recordType5", () => {
@@ -238,7 +238,7 @@ module ts {
         "pos": 2,
         "end": 18
     }
-}`)
+}`);
                 });
 
                 it("recordType6", () => {
@@ -279,7 +279,7 @@ module ts {
         "pos": 2,
         "end": 18
     }
-}`)
+}`);
                 });
 
                 it("recordType7", () => {
@@ -325,7 +325,7 @@ module ts {
         "pos": 2,
         "end": 26
     }
-}`)
+}`);
                 });
 
                 it("recordType8", () => {
@@ -351,7 +351,7 @@ module ts {
         "pos": 2,
         "end": 10
     }
-}`)
+}`);
                 });
 
                 it("unionType", () => {
@@ -987,15 +987,15 @@ module ts {
 
         describe("DocComments", () => {
             function parsesCorrectly(content: string, expected: string) {
-                let comment = parseIsolatedJSDocComment(content);
+                const comment = parseIsolatedJSDocComment(content);
                 if (!comment) {
-                    Debug.fail('Comment failed to parse entirely');
+                    Debug.fail("Comment failed to parse entirely");
                 }
                 if (comment.diagnostics.length > 0) {
-                    Debug.fail('Comment has at least one diagnostic: ' + comment.diagnostics[0].messageText);
+                    Debug.fail("Comment has at least one diagnostic: " + comment.diagnostics[0].messageText);
                 }
 
-                let result = JSON.stringify(comment.jsDocComment, (k, v) => {
+                const result = JSON.stringify(comment.jsDocComment, (k, v) => {
                     return v && v.pos !== undefined
                         ? JSON.parse(Utils.sourceFileToJSON(v))
                         : v;
@@ -1003,8 +1003,8 @@ module ts {
 
                 if (result !== expected) {
                     // Turn on a human-readable diff
-                    if (typeof require !== 'undefined') {
-                        require('chai').config.showDiff = true;
+                    if (typeof require !== "undefined") {
+                        require("chai").config.showDiff = true;
                         chai.expect(JSON.parse(result)).equal(JSON.parse(expected));
                     }
                     else {
@@ -1014,7 +1014,7 @@ module ts {
             }
 
             function parsesIncorrectly(content: string) {
-                let type = parseIsolatedJSDocComment(content);
+                const type = parseIsolatedJSDocComment(content);
                 assert.isTrue(!type || type.diagnostics.length > 0);
             }
 
@@ -1034,7 +1034,7 @@ module ts {
                 it("multipleTypes", () => {
                     parsesIncorrectly(
 `/**
-  * @type {number} 
+  * @type {number}
   * @type {string}
   */`);
                 });
@@ -1071,7 +1071,7 @@ module ts {
                 it("paramWithoutTypeOrName", () => {
                     parsesIncorrectly(
 `/**
-  * @param 
+  * @param
   */`);
                 });
             });
@@ -2218,4 +2218,4 @@ module ts {
             });
         });
     });
-}
\ No newline at end of file
+}
diff --git a/tests/cases/unittests/moduleResolution.ts b/tests/cases/unittests/moduleResolution.ts
index 29fde331892..bf7d9cea922 100644
--- a/tests/cases/unittests/moduleResolution.ts
+++ b/tests/cases/unittests/moduleResolution.ts
@@ -2,32 +2,34 @@
 /// <reference path='..\..\..\src\harness\harness.ts' />
 
 declare namespace chai.assert {
+    /* tslint:disable no-unused-variable */
     function deepEqual(actual: any, expected: any): void;
+    /* tslint:enable no-unused-variable */
 }
 
-module ts {
+namespace ts {
     function diagnosticToString(diagnostic: Diagnostic) {
         let output = "";
 
         if (diagnostic.file) {
-            let loc = getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start);
+            const loc = getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start);
 
             output += `${diagnostic.file.fileName}(${loc.line + 1},${loc.character + 1}): `;
         }
 
-        let category = DiagnosticCategory[diagnostic.category].toLowerCase();
+        const category = DiagnosticCategory[diagnostic.category].toLowerCase();
         output += `${category} TS${diagnostic.code}: ${flattenDiagnosticMessageText(diagnostic.messageText, sys.newLine)}${sys.newLine}`;
 
         return output;
     }
 
     interface File {
-        name: string
-        content?: string
+        name: string;
+        content?: string;
     }
 
     function createModuleResolutionHost(hasDirectoryExists: boolean, ...files: File[]): ModuleResolutionHost {
-        let map = arrayToMap(files, f => f.name);
+        const map = arrayToMap(files, f => f.name);
 
         if (hasDirectoryExists) {
             const directories: Map<string> = {};
@@ -35,7 +37,7 @@ module ts {
                 let name = getDirectoryPath(f.name);
                 while (true) {
                     directories[name] = name;
-                    let baseName = getDirectoryPath(name);
+                    const baseName = getDirectoryPath(name);
                     if (baseName === name) {
                         break;
                     }
@@ -44,14 +46,14 @@ module ts {
             }
             return {
                 readFile,
-                directoryExists: path => { 
-                    return hasProperty(directories, path); 
+                directoryExists: path => {
+                    return hasProperty(directories, path);
                 },
                 fileExists: path => {
                     assert.isTrue(hasProperty(directories, getDirectoryPath(path)), `'fileExists' '${path}' request in non-existing directory`);
                     return hasProperty(map, path);
                 }
-            }
+            };
         }
         else {
             return { readFile, fileExists: path => hasProperty(map, path), };
@@ -61,31 +63,24 @@ module ts {
         }
     }
 
-    function splitPath(path: string): { dir: string; rel: string } {
-        let index = path.indexOf(directorySeparator);
-        return index === -1
-            ? { dir: path, rel: undefined }
-            : { dir: path.substr(0, index), rel: path.substr(index + 1) };
-    }
-
     describe("Node module resolution - relative paths", () => {
 
         function testLoadAsFile(containingFileName: string, moduleFileNameNoExt: string, moduleName: string): void {
-            for (let ext of supportedTypeScriptExtensions) {
+            for (const ext of supportedTypeScriptExtensions) {
                 test(ext, /*hasDirectoryExists*/ false);
                 test(ext, /*hasDirectoryExists*/ true);
             }
 
             function test(ext: string, hasDirectoryExists: boolean) {
-                let containingFile = { name: containingFileName }
-                let moduleFile = { name: moduleFileNameNoExt + ext }
-                let resolution = nodeModuleNameResolver(moduleName, containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, moduleFile));
+                const containingFile = { name: containingFileName };
+                const moduleFile = { name: moduleFileNameNoExt + ext };
+                const resolution = nodeModuleNameResolver(moduleName, containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, moduleFile));
                 assert.equal(resolution.resolvedModule.resolvedFileName, moduleFile.name);
                 assert.equal(!!resolution.resolvedModule.isExternalLibraryImport, false);
 
-                let failedLookupLocations: string[] = [];
-                let dir = getDirectoryPath(containingFileName);
-                for (let e of supportedTypeScriptExtensions) {
+                const failedLookupLocations: string[] = [];
+                const dir = getDirectoryPath(containingFileName);
+                for (const e of supportedTypeScriptExtensions) {
                     if (e === ext) {
                         break;
                     }
@@ -120,10 +115,10 @@ module ts {
             test(/*hasDirectoryExists*/ true);
 
             function test(hasDirectoryExists: boolean) {
-                let containingFile = { name: containingFileName };
-                let packageJson = { name: packageJsonFileName, content: JSON.stringify({ "typings": fieldRef }) };
-                let moduleFile = { name: moduleFileName };
-                let resolution = nodeModuleNameResolver(moduleName, containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, packageJson, moduleFile));
+                const containingFile = { name: containingFileName };
+                const packageJson = { name: packageJsonFileName, content: JSON.stringify({ "typings": fieldRef }) };
+                const moduleFile = { name: moduleFileName };
+                const resolution = nodeModuleNameResolver(moduleName, containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, packageJson, moduleFile));
                 assert.equal(resolution.resolvedModule.resolvedFileName, moduleFile.name);
                 assert.equal(!!resolution.resolvedModule.isExternalLibraryImport, false);
                 // expect three failed lookup location - attempt to load module as file with all supported extensions
@@ -143,14 +138,14 @@ module ts {
             test(/*hasDirectoryExists*/ true);
 
             function test(hasDirectoryExists: boolean) {
-                let containingFile = { name: "/a/b.ts" };
-                let packageJson = { name: "/node_modules/b/package.json", content: JSON.stringify({ "typings": typings }) };
-                let moduleFile = { name: "/a/b.d.ts" };
+                const containingFile = { name: "/a/b.ts" };
+                const packageJson = { name: "/node_modules/b/package.json", content: JSON.stringify({ "typings": typings }) };
+                const moduleFile = { name: "/a/b.d.ts" };
 
-                let indexPath = "/node_modules/b/index.d.ts";
-                let indexFile = { name: indexPath }
+                const indexPath = "/node_modules/b/index.d.ts";
+                const indexFile = { name: indexPath };
 
-                let resolution = nodeModuleNameResolver("b", containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, packageJson, moduleFile, indexFile));
+                const resolution = nodeModuleNameResolver("b", containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, packageJson, moduleFile, indexFile));
 
                 assert.equal(resolution.resolvedModule.resolvedFileName, indexPath);
             }
@@ -160,7 +155,9 @@ module ts {
             testTypingsIgnored(["a", "b"]);
             testTypingsIgnored({ "a": "b" });
             testTypingsIgnored(true);
+            /* tslint:disable no-null-keyword */
             testTypingsIgnored(null);
+            /* tslint:enable no-null-keyword */
             testTypingsIgnored(undefined);
         });
 
@@ -169,10 +166,10 @@ module ts {
             test(/*hasDirectoryExists*/ true);
 
             function test(hasDirectoryExists: boolean) {
-                let containingFile = { name: "/a/b/c.ts" };
-                let packageJson = { name: "/a/b/foo/package.json", content: JSON.stringify({ main: "/c/d" }) };
-                let indexFile = { name: "/a/b/foo/index.d.ts" };
-                let resolution = nodeModuleNameResolver("./foo", containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, packageJson, indexFile));
+                const containingFile = { name: "/a/b/c.ts" };
+                const packageJson = { name: "/a/b/foo/package.json", content: JSON.stringify({ main: "/c/d" }) };
+                const indexFile = { name: "/a/b/foo/index.d.ts" };
+                const resolution = nodeModuleNameResolver("./foo", containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, packageJson, indexFile));
                 assert.equal(resolution.resolvedModule.resolvedFileName, indexFile.name);
                 assert.equal(!!resolution.resolvedModule.isExternalLibraryImport, false);
                 assert.deepEqual(resolution.failedLookupLocations, [
@@ -192,9 +189,9 @@ module ts {
             test(/*hasDirectoryExists*/ true);
 
             function test(hasDirectoryExists: boolean) {
-                let containingFile = { name: "/a/b/c/d/e.ts" };
-                let moduleFile = { name: "/a/b/node_modules/foo.ts" };
-                let resolution = nodeModuleNameResolver("foo", containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, moduleFile));
+                const containingFile = { name: "/a/b/c/d/e.ts" };
+                const moduleFile = { name: "/a/b/node_modules/foo.ts" };
+                const resolution = nodeModuleNameResolver("foo", containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, moduleFile));
                 assert.equal(resolution.resolvedModule.resolvedFileName, moduleFile.name);
                 assert.deepEqual(resolution.failedLookupLocations, [
                     "/a/b/c/d/node_modules/foo.ts",
@@ -225,7 +222,7 @@ module ts {
                     "/a/b/c/node_modules/@types/foo/index.ts",
                     "/a/b/c/node_modules/@types/foo/index.tsx",
                     "/a/b/c/node_modules/@types/foo/index.d.ts",
-                ])
+                ]);
             }
         });
 
@@ -234,9 +231,9 @@ module ts {
             test(/*hasDirectoryExists*/ true);
 
             function test(hasDirectoryExists: boolean) {
-                let containingFile = { name: "/a/b/c/d/e.ts" };
-                let moduleFile = { name: "/a/b/node_modules/foo.d.ts" };
-                let resolution = nodeModuleNameResolver("foo", containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, moduleFile));
+                const containingFile = { name: "/a/b/c/d/e.ts" };
+                const moduleFile = { name: "/a/b/node_modules/foo.d.ts" };
+                const resolution = nodeModuleNameResolver("foo", containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, moduleFile));
                 assert.equal(resolution.resolvedModule.resolvedFileName, moduleFile.name);
                 assert.equal(resolution.resolvedModule.isExternalLibraryImport, true);
             }
@@ -247,9 +244,9 @@ module ts {
             test(/*hasDirectoryExists*/ true);
 
             function test(hasDirectoryExists: boolean) {
-                let containingFile = { name: "/a/node_modules/b/c/node_modules/d/e.ts" };
-                let moduleFile = { name: "/a/node_modules/foo/index.d.ts" };
-                let resolution = nodeModuleNameResolver("foo", containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, moduleFile));
+                const containingFile = { name: "/a/node_modules/b/c/node_modules/d/e.ts" };
+                const moduleFile = { name: "/a/node_modules/foo/index.d.ts" };
+                const resolution = nodeModuleNameResolver("foo", containingFile.name, {}, createModuleResolutionHost(hasDirectoryExists, containingFile, moduleFile));
                 assert.equal(resolution.resolvedModule.resolvedFileName, moduleFile.name);
                 assert.equal(resolution.resolvedModule.isExternalLibraryImport, true);
                 assert.deepEqual(resolution.failedLookupLocations, [
@@ -311,7 +308,7 @@ module ts {
             const options: CompilerOptions = { module: ModuleKind.CommonJS };
             const host: CompilerHost = {
                 getSourceFile: (fileName: string, languageVersion: ScriptTarget) => {
-                    let path = normalizePath(combinePaths(currentDirectory, fileName));
+                    const path = normalizePath(combinePaths(currentDirectory, fileName));
                     return hasProperty(files, path) ? createSourceFile(fileName, files[path], languageVersion) : undefined;
                 },
                 getDefaultLibFileName: () => "lib.d.ts",
@@ -321,7 +318,7 @@ module ts {
                 getNewLine: () => "\r\n",
                 useCaseSensitiveFileNames: () => false,
                 fileExists: fileName => {
-                    let path = normalizePath(combinePaths(currentDirectory, fileName));
+                    const path = normalizePath(combinePaths(currentDirectory, fileName));
                     return hasProperty(files, path);
                 },
                 readFile: (fileName): string => { throw new Error("NotImplemented"); }
@@ -359,13 +356,13 @@ export = C;
             };
             test(files, "/a/b/c/first/second", ["class_a.ts"], 3, ["../../../c/third/class_c.ts"]);
         });
-        
+
         it("should find modules in node_modules", () => {
             const files: Map<string> = {
                 "/parent/node_modules/mod/index.d.ts": "export var x",
                 "/parent/app/myapp.ts": `import {x} from "mod"`
             };
-            test(files, "/parent/app",["myapp.ts"], 2, []);
+            test(files, "/parent/app", ["myapp.ts"], 2, []);
         });
 
         it("should find file referenced via absolute and relative names", () => {
@@ -376,14 +373,14 @@ export = C;
             test(files, "/a/b", ["c.ts", "/a/b/b.ts"], 2, []);
         });
     });
-    
+
     describe("Files with different casing", () => {
         const library = createSourceFile("lib.d.ts", "", ScriptTarget.ES5);
         function test(files: Map<string>, options: CompilerOptions, currentDirectory: string, useCaseSensitiveFileNames: boolean, rootFiles: string[], diagnosticCodes: number[]): void {
             const getCanonicalFileName = createGetCanonicalFileName(useCaseSensitiveFileNames);
             if (!useCaseSensitiveFileNames) {
-                let f: Map<string> = {};
-                for (let fileName in files) {
+                const f: Map<string> = {};
+                for (const fileName in files) {
                     f[getCanonicalFileName(fileName)] = files[fileName];
                 }
                 files = f;
@@ -394,7 +391,7 @@ export = C;
                     if (fileName === "lib.d.ts") {
                         return library;
                     }
-                    let path = getCanonicalFileName(normalizePath(combinePaths(currentDirectory, fileName)));
+                    const path = getCanonicalFileName(normalizePath(combinePaths(currentDirectory, fileName)));
                     return hasProperty(files, path) ? createSourceFile(fileName, files[path], languageVersion) : undefined;
                 },
                 getDefaultLibFileName: () => "lib.d.ts",
@@ -404,7 +401,7 @@ export = C;
                 getNewLine: () => "\r\n",
                 useCaseSensitiveFileNames: () => useCaseSensitiveFileNames,
                 fileExists: fileName => {
-                    let path = getCanonicalFileName(normalizePath(combinePaths(currentDirectory, fileName)));
+                    const path = getCanonicalFileName(normalizePath(combinePaths(currentDirectory, fileName)));
                     return hasProperty(files, path);
                 },
                 readFile: (fileName): string => { throw new Error("NotImplemented"); }
@@ -412,7 +409,7 @@ export = C;
             const program = createProgram(rootFiles, options, host);
             const diagnostics = sortAndDeduplicateDiagnostics(program.getSemanticDiagnostics().concat(program.getOptionsDiagnostics()));
             assert.equal(diagnostics.length, diagnosticCodes.length, `Incorrect number of expected diagnostics, expected ${diagnosticCodes.length}, got '${map(diagnostics, diagnosticToString).join("\r\n")}'`);
-            for (let i = 0; i < diagnosticCodes.length; ++i) {
+            for (let i = 0; i < diagnosticCodes.length; i++) {
                 assert.equal(diagnostics[i].code, diagnosticCodes[i], `Expected diagnostic code ${diagnosticCodes[i]}, got '${diagnostics[i].code}': '${diagnostics[i].messageText}'`);
             }
         }
@@ -422,7 +419,7 @@ export = C;
                 "/a/b/c.ts": `/// <reference path="d.ts"/>`,
                 "/a/b/d.ts": "var x"
             };
-            test(files, { module: ts.ModuleKind.AMD },  "/a/b", /* useCaseSensitiveFileNames */ false, ["c.ts", "/a/b/d.ts"], []);
+            test(files, { module: ts.ModuleKind.AMD },  "/a/b", /*useCaseSensitiveFileNames*/ false, ["c.ts", "/a/b/d.ts"], []);
         });
 
         it("should fail when two files used in program differ only in casing (tripleslash references)", () => {
@@ -430,7 +427,7 @@ export = C;
                 "/a/b/c.ts": `/// <reference path="D.ts"/>`,
                 "/a/b/d.ts": "var x"
             };
-            test(files, { module: ts.ModuleKind.AMD, forceConsistentCasingInFileNames: true },  "/a/b", /* useCaseSensitiveFileNames */ false, ["c.ts", "d.ts"], [1149]);
+            test(files, { module: ts.ModuleKind.AMD, forceConsistentCasingInFileNames: true },  "/a/b", /*useCaseSensitiveFileNames*/ false, ["c.ts", "d.ts"], [1149]);
         });
 
         it("should fail when two files used in program differ only in casing (imports)", () => {
@@ -438,7 +435,7 @@ export = C;
                 "/a/b/c.ts": `import {x} from "D"`,
                 "/a/b/d.ts": "export var x"
             };
-            test(files, { module: ts.ModuleKind.AMD, forceConsistentCasingInFileNames: true },  "/a/b", /* useCaseSensitiveFileNames */ false, ["c.ts", "d.ts"], [1149]);
+            test(files, { module: ts.ModuleKind.AMD, forceConsistentCasingInFileNames: true },  "/a/b", /*useCaseSensitiveFileNames*/ false, ["c.ts", "d.ts"], [1149]);
         });
 
         it("should fail when two files used in program differ only in casing (imports, relative module names)", () => {
@@ -446,7 +443,7 @@ export = C;
                 "moduleA.ts": `import {x} from "./ModuleB"`,
                 "moduleB.ts": "export var x"
             };
-            test(files, { module: ts.ModuleKind.CommonJS, forceConsistentCasingInFileNames: true },  "", /* useCaseSensitiveFileNames */ false, ["moduleA.ts", "moduleB.ts"], [1149]);
+            test(files, { module: ts.ModuleKind.CommonJS, forceConsistentCasingInFileNames: true },  "", /*useCaseSensitiveFileNames*/ false, ["moduleA.ts", "moduleB.ts"], [1149]);
         });
 
         it("should fail when two files exist on disk that differs only in casing", () => {
@@ -455,7 +452,7 @@ export = C;
                 "/a/b/D.ts": "export var x",
                 "/a/b/d.ts": "export var y"
             };
-            test(files, { module: ts.ModuleKind.AMD },  "/a/b", /* useCaseSensitiveFileNames */ true, ["c.ts", "d.ts"], [1149]);
+            test(files, { module: ts.ModuleKind.AMD },  "/a/b", /*useCaseSensitiveFileNames*/ true, ["c.ts", "d.ts"], [1149]);
         });
 
         it("should fail when module name in 'require' calls has inconsistent casing", () => {
@@ -464,7 +461,7 @@ export = C;
                 "moduleB.ts": `import a = require("./moduleC")`,
                 "moduleC.ts": "export var x"
             };
-            test(files, { module: ts.ModuleKind.CommonJS, forceConsistentCasingInFileNames: true },  "", /* useCaseSensitiveFileNames */ false, ["moduleA.ts", "moduleB.ts", "moduleC.ts"], [1149, 1149]);
+            test(files, { module: ts.ModuleKind.CommonJS, forceConsistentCasingInFileNames: true },  "", /*useCaseSensitiveFileNames*/ false, ["moduleA.ts", "moduleB.ts", "moduleC.ts"], [1149, 1149]);
         });
 
         it("should fail when module names in 'require' calls has inconsistent casing and current directory has uppercase chars", () => {
@@ -477,7 +474,7 @@ import a = require("./moduleA.ts");
 import b = require("./moduleB.ts");
                 `
             };
-            test(files, { module: ts.ModuleKind.CommonJS, forceConsistentCasingInFileNames: true },  "/a/B/c", /* useCaseSensitiveFileNames */ false, ["moduleD.ts"], [1149]);
+            test(files, { module: ts.ModuleKind.CommonJS, forceConsistentCasingInFileNames: true },  "/a/B/c", /*useCaseSensitiveFileNames*/ false, ["moduleD.ts"], [1149]);
         });
         it("should not fail when module names in 'require' calls has consistent casing and current directory has uppercase chars", () => {
             const files: Map<string> = {
@@ -489,8 +486,8 @@ import a = require("./moduleA.ts");
 import b = require("./moduleB.ts");
                 `
             };
-            test(files, { module: ts.ModuleKind.CommonJS, forceConsistentCasingInFileNames: true },  "/a/B/c", /* useCaseSensitiveFileNames */ false, ["moduleD.ts"], []);
-        })
+            test(files, { module: ts.ModuleKind.CommonJS, forceConsistentCasingInFileNames: true },  "/a/B/c", /*useCaseSensitiveFileNames*/ false, ["moduleD.ts"], []);
+        });
     });
 
     describe("baseUrl augmented module resolution", () => {
@@ -528,7 +525,7 @@ import b = require("./moduleB.ts");
             }
             // add failure tests
         });
-        
+
         it("node + baseUrl", () => {
             test(/*hasDirectoryExists*/ false);
             test(/*hasDirectoryExists*/ true);
@@ -538,7 +535,7 @@ import b = require("./moduleB.ts");
                 const m1: File = { name: "/root/m1.ts" }; // load file as module
                 const m2: File = { name: "/root/m2/index.d.ts" }; // load folder as module
                 const m3: File = { name: "/root/m3/package.json", content: JSON.stringify({ typings: "dist/typings.d.ts" }) };
-                const m3Typings: File = { name: "/root/m3/dist/typings.d.ts" }; 
+                const m3Typings: File = { name: "/root/m3/dist/typings.d.ts" };
                 const m4: File = { name: "/root/node_modules/m4.ts" }; // fallback to node
 
                 const options: CompilerOptions = { moduleResolution: ModuleResolutionKind.NodeJs, baseUrl: "/root" };
@@ -548,13 +545,13 @@ import b = require("./moduleB.ts");
                 check("m2", main, m2);
                 check("m3", main, m3Typings);
                 check("m4", main, m4);
-                
+
                 function check(name: string, caller: File, expected: File) {
                     const result = resolveModuleName(name, caller.name, options, host);
                     assert.isTrue(result.resolvedModule !== undefined);
                     assert.equal(result.resolvedModule.resolvedFileName, expected.name);
                 }
-            } 
+            }
         });
 
         it("classic + baseUrl", () => {
@@ -571,14 +568,14 @@ import b = require("./moduleB.ts");
 
                 check("m1", main, m1);
                 check("m2", main, m2);
-                
+
                 function check(name: string, caller: File, expected: File) {
                     const result = resolveModuleName(name, caller.name, options, host);
                     assert.isTrue(result.resolvedModule !== undefined);
                     assert.equal(result.resolvedModule.resolvedFileName, expected.name);
                 }
-            } 
-        })
+            }
+        });
 
         it("node + baseUrl + path mappings", () => {
             test(/*hasDirectoryExists*/ false);
@@ -586,16 +583,16 @@ import b = require("./moduleB.ts");
 
             function test(hasDirectoryExists: boolean) {
                 const main: File = { name: "/root/folder1/main.ts" };
-                 
+
                 const file1: File = { name: "/root/folder1/file1.ts" };
-                const file2: File = { name: "/root/generated/folder1/file2.ts" } // load remapped file as module
-                const file3: File = { name: "/root/generated/folder2/file3/index.d.ts" } // load folder a module
+                const file2: File = { name: "/root/generated/folder1/file2.ts" }; // load remapped file as module
+                const file3: File = { name: "/root/generated/folder2/file3/index.d.ts" }; // load folder a module
                 const file4Typings: File = { name: "/root/generated/folder2/file4/package.json", content: JSON.stringify({ typings: "dist/types.d.ts" })};
                 const file4: File = { name: "/root/generated/folder2/file4/dist/types.d.ts" }; // load file pointed by typings
-                const file5: File = { name: "/root/someanotherfolder/file5/index.d.ts" } // load remapped module from folder
+                const file5: File = { name: "/root/someanotherfolder/file5/index.d.ts" }; // load remapped module from folder
                 const file6: File = { name: "/root/node_modules/file6.ts" }; // fallback to node
                 const host = createModuleResolutionHost(hasDirectoryExists, file1, file2, file3, file4, file4Typings, file5, file6);
-                
+
                 const options: CompilerOptions = {
                     moduleResolution: ModuleResolutionKind.NodeJs,
                     baseUrl: "/root",
@@ -723,12 +720,12 @@ import b = require("./moduleB.ts");
 
             function test(hasDirectoryExists: boolean) {
                 const main: File = { name: "/root/folder1/main.ts" };
-                 
+
                 const file1: File = { name: "/root/folder1/file1.ts" };
                 const file2: File = { name: "/root/generated/folder1/file2.ts" };
                 const file3: File = { name: "/folder1/file3.ts" }; // fallback to classic
                 const host = createModuleResolutionHost(hasDirectoryExists, file1, file2, file3);
-                
+
                 const options: CompilerOptions = {
                     moduleResolution: ModuleResolutionKind.Classic,
                     baseUrl: "/root",
@@ -776,17 +773,17 @@ import b = require("./moduleB.ts");
                     assert.deepEqual(result.failedLookupLocations, expectedFailedLookups);
                 }
             }
-        })
+        });
 
         it ("node + rootDirs", () => {
             test(/*hasDirectoryExists*/ false);
             test(/*hasDirectoryExists*/ true);
 
             function test(hasDirectoryExists: boolean) {
-                let file1: File = { name: "/root/folder1/file1.ts" };
-                let file1_1: File = { name: "/root/folder1/file1_1/index.d.ts" };
-                let file2: File = { name: "/root/generated/folder1/file2.ts" };
-                let file3: File = { name: "/root/generated/folder2/file3.ts" };
+                const file1: File = { name: "/root/folder1/file1.ts" };
+                const file1_1: File = { name: "/root/folder1/file1_1/index.d.ts" };
+                const file2: File = { name: "/root/generated/folder1/file2.ts" };
+                const file3: File = { name: "/root/generated/folder2/file3.ts" };
                 const host = createModuleResolutionHost(hasDirectoryExists, file1, file1_1, file2, file3);
                 const options: CompilerOptions = {
                     moduleResolution: ModuleResolutionKind.NodeJs,
@@ -848,7 +845,7 @@ import b = require("./moduleB.ts");
                     const result = resolveModuleName(name, container.name, options, host);
                     assert.isTrue(result.resolvedModule !== undefined, "module should be resolved");
                     assert.equal(result.resolvedModule.resolvedFileName, expected.name);
-                    assert.deepEqual(result.failedLookupLocations,expectedFailedLookups);
+                    assert.deepEqual(result.failedLookupLocations, expectedFailedLookups);
                 }
             }
         });
@@ -857,10 +854,10 @@ import b = require("./moduleB.ts");
             test(/*hasDirectoryExists*/ false);
 
             function test(hasDirectoryExists: boolean) {
-                let file1: File = { name: "/root/folder1/file1.ts" };
-                let file2: File = { name: "/root/generated/folder1/file2.ts" };
-                let file3: File = { name: "/root/generated/folder2/file3.ts" };
-                let file4: File = { name: "/folder1/file1_1.ts" };
+                const file1: File = { name: "/root/folder1/file1.ts" };
+                const file2: File = { name: "/root/generated/folder1/file2.ts" };
+                const file3: File = { name: "/root/generated/folder2/file3.ts" };
+                const file4: File = { name: "/folder1/file1_1.ts" };
                 const host = createModuleResolutionHost(hasDirectoryExists, file1, file2, file3, file4);
                 const options: CompilerOptions = {
                     moduleResolution: ModuleResolutionKind.Classic,
@@ -904,7 +901,7 @@ import b = require("./moduleB.ts");
                     const result = resolveModuleName(name, container.name, options, host);
                     assert.isTrue(result.resolvedModule !== undefined, "module should be resolved");
                     assert.equal(result.resolvedModule.resolvedFileName, expected.name);
-                    assert.deepEqual(result.failedLookupLocations,expectedFailedLookups);
+                    assert.deepEqual(result.failedLookupLocations, expectedFailedLookups);
                 }
             }
         });
@@ -914,12 +911,12 @@ import b = require("./moduleB.ts");
             test(/*hasDirectoryExists*/ true);
 
             function test(hasDirectoryExists: boolean) {
-                const app: File = { name: "/root/src/app.ts" }
+                const app: File = { name: "/root/src/app.ts" };
                 const libsPackage: File = { name: "/root/src/libs/guid/package.json", content: JSON.stringify({ typings: "dist/guid.d.ts" }) };
                 const libsTypings: File = { name: "/root/src/libs/guid/dist/guid.d.ts" };
                 const host = createModuleResolutionHost(hasDirectoryExists, app, libsPackage, libsTypings);
-                const options: CompilerOptions = { 
-                    moduleResolution: ModuleResolutionKind.NodeJs, 
+                const options: CompilerOptions = {
+                    moduleResolution: ModuleResolutionKind.NodeJs,
                     baseUrl: "/root",
                     paths: {
                         "libs/guid": [ "src/libs/guid" ]
@@ -935,7 +932,7 @@ import b = require("./moduleB.ts");
                     "/root/src/libs/guid.d.ts",
                 ]);
             }
-        })
+        });
     });
 
     function notImplemented(name: string): () => any {
@@ -957,7 +954,7 @@ import b = require("./moduleB.ts");
 
     describe("Type reference directive resolution: ", () => {
         function test(typesRoot: string, typeDirective: string, primary: boolean, initialFile: File, targetFile: File, ...otherFiles: File[]) {
-            const host = createModuleResolutionHost(false, ...[initialFile, targetFile].concat(...otherFiles));
+            const host = createModuleResolutionHost(/*hasDirectoryExists*/ false, ...[initialFile, targetFile].concat(...otherFiles));
             const result = resolveTypeReferenceDirective(typeDirective, initialFile.name, {typesRoot}, host);
             assert(result.resolvedTypeReferenceDirective.resolvedFileName !== undefined, "expected type directive to be resolved");
             assert.equal(result.resolvedTypeReferenceDirective.resolvedFileName, targetFile.name, "unexpected result of type reference resolution");
@@ -966,63 +963,63 @@ import b = require("./moduleB.ts");
 
         it("Can be resolved from primary location", () => {
             {
-                const f1 = { name: "/root/src/app.ts" }
-                const f2 = { name: "/root/src/types/lib/index.d.ts" }; 
+                const f1 = { name: "/root/src/app.ts" };
+                const f2 = { name: "/root/src/types/lib/index.d.ts" };
                 test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2);
             }
             {
-                const f1 = { name: "/root/src/app.ts" }
+                const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/src/types/lib/typings/lib.d.ts" };
-                const package = { name: "/root/src/types/lib/package.json", content: JSON.stringify({types: "typings/lib.d.ts"}) }; 
+                const package = { name: "/root/src/types/lib/package.json", content: JSON.stringify({types: "typings/lib.d.ts"}) };
                 test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2, package);
             }
             {
-                const f1 = { name: "/root/src/app.ts" }
-                const f2 = { name: "/root/src/node_modules/lib/index.d.ts" }; 
+                const f1 = { name: "/root/src/app.ts" };
+                const f2 = { name: "/root/src/node_modules/lib/index.d.ts" };
                 test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2);
             }
             {
-                const f1 = { name: "/root/src/app.ts" }
+                const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/src/node_modules/lib/typings/lib.d.ts" };
-                const package = { name: "/root/src/node_modules/lib/package.json", content: JSON.stringify({types: "typings/lib.d.ts"}) }; 
+                const package = { name: "/root/src/node_modules/lib/package.json", content: JSON.stringify({types: "typings/lib.d.ts"}) };
                 test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2, package);
             }
             {
-                const f1 = { name: "/root/src/app.ts" }
-                const f2 = { name: "/root/src/node_modules/@types/lib/index.d.ts" }; 
+                const f1 = { name: "/root/src/app.ts" };
+                const f2 = { name: "/root/src/node_modules/@types/lib/index.d.ts" };
                 test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2);
             }
             {
-                const f1 = { name: "/root/src/app.ts" }
+                const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/src/node_modules/@types/lib/typings/lib.d.ts" };
-                const package = { name: "/root/src/node_modules/@types/lib/package.json", content: JSON.stringify({types: "typings/lib.d.ts"}) }; 
+                const package = { name: "/root/src/node_modules/@types/lib/package.json", content: JSON.stringify({types: "typings/lib.d.ts"}) };
                 test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2, package);
             }
         });
         it("Can be resolved from secondary location", () => {
             {
-                const f1 = { name: "/root/src/app.ts" }
+                const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/node_modules/lib.d.ts" };
                 test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ false, f1, f2);
             }
             {
-                const f1 = { name: "/root/src/app.ts" }
+                const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/node_modules/lib/index.d.ts" };
                 test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ false, f1, f2);
             }
             {
-                const f1 = { name: "/root/src/app.ts" }
+                const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/node_modules/lib/typings/lib.d.ts" };
                 const package = { name: "/root/node_modules/lib/package.json", content: JSON.stringify({typings: "typings/lib.d.ts"}) };
                 test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ false, f1, f2, package);
             }
             {
-                const f1 = { name: "/root/src/app.ts" }
+                const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/node_modules/@types/lib/index.d.ts" };
                 test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ false, f1, f2);
             }
             {
-                const f1 = { name: "/root/src/app.ts" }
+                const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/node_modules/@types/lib/typings/lib.d.ts" };
                 const package = { name: "/root/node_modules/@types/lib/package.json", content: JSON.stringify({typings: "typings/lib.d.ts"}) };
                 test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ false, f1, f2, package);
@@ -1032,17 +1029,17 @@ import b = require("./moduleB.ts");
             {
                 const f1 = { name: "/root/src/a/b/c/app.ts" };
                 const f2 = { name: "/root/src/types/lib/index.d.ts" };
-                const f3 = { name: "/root/src/a/b/node_modules/lib.d.ts" }
+                const f3 = { name: "/root/src/a/b/node_modules/lib.d.ts" };
                 test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2, f3);
             }
-        })
+        });
         it("Reused program keeps errors", () => {
             const f1 = { name: "/root/src/a/b/c/d/e/app.ts", content: `/// <reference types="lib"/>` };
             const f2 = { name: "/root/src/a/b/c/d/node_modules/lib/index.d.ts", content: `declare var x: number;` };
             const f3 = { name: "/root/src/a/b/c/d/f/g/app.ts", content: `/// <reference types="lib"/>` };
             const f4 = { name: "/root/src/a/b/c/d/f/node_modules/lib/index.d.ts", content: `declare var x: number;` };
             const files = [f1, f2, f3, f4];
-            
+
             const names = map(files, f => f.name);
             const sourceFiles = arrayToMap(map(files, f => createSourceFile(f.name, f.content, ScriptTarget.ES6)), f => f.fileName);
             const compilerHost: CompilerHost = {
@@ -1062,11 +1059,13 @@ import b = require("./moduleB.ts");
             const diagnostics1 = program1.getFileProcessingDiagnostics().getDiagnostics();
             assert.equal(diagnostics1.length, 1, "expected one diagnostic");
 
+            /* tslint:disable no-unused-variable */
             const program2 = createProgram(names, {}, compilerHost, program1);
+            /* tslint:enable no-unused-variable */
             assert.isTrue(program1.structureIsReused);
             const diagnostics2 = program1.getFileProcessingDiagnostics().getDiagnostics();
             assert.equal(diagnostics2.length, 1, "expected one diagnostic");
             assert.equal(diagnostics1[0].messageText, diagnostics2[0].messageText, "expected one diagnostic");
-        })
+        });
     });
-}
\ No newline at end of file
+}
diff --git a/tests/cases/unittests/reuseProgramStructure.ts b/tests/cases/unittests/reuseProgramStructure.ts
index 61d5d56ca2c..b3d51ebb75c 100644
--- a/tests/cases/unittests/reuseProgramStructure.ts
+++ b/tests/cases/unittests/reuseProgramStructure.ts
@@ -2,7 +2,7 @@
 /// <reference path='..\..\..\src\harness\harness.ts' />
 /// <reference path="..\..\..\src\harness\harnessLanguageService.ts" />
 
-module ts {
+namespace ts {
 
     const enum ChangedPart {
         references = 1 << 0,
@@ -10,7 +10,7 @@ module ts {
         program = 1 << 2
     }
 
-    let newLine = "\r\n";
+    const newLine = "\r\n";
 
     interface SourceFileWithText extends SourceFile {
         sourceText?: SourceText;
@@ -18,7 +18,7 @@ module ts {
 
     interface NamedSourceText {
         name: string;
-        text: SourceText
+        text: SourceText;
     }
 
     interface ProgramWithSourceTexts extends Program {
@@ -72,9 +72,9 @@ module ts {
         }
 
         getChangeRange(oldSnapshot: IScriptSnapshot): TextChangeRange {
-            var oldText = <SourceText>oldSnapshot;
-            var oldSpan: TextSpan;
-            var newLength: number;
+            const oldText = <SourceText>oldSnapshot;
+            let oldSpan: TextSpan;
+            let newLength: number;
             switch (oldText.changedPart ^ this.changedPart) {
                 case ChangedPart.references:
                     oldSpan = createTextSpan(0, oldText.references.length);
@@ -82,7 +82,7 @@ module ts {
                     break;
                 case ChangedPart.importsAndExports:
                     oldSpan = createTextSpan(oldText.references.length, oldText.importsAndExports.length);
-                    newLength = this.importsAndExports.length
+                    newLength = this.importsAndExports.length;
                     break;
                 case ChangedPart.program:
                     oldSpan = createTextSpan(oldText.references.length + oldText.importsAndExports.length, oldText.program.length);
@@ -97,19 +97,19 @@ module ts {
     }
 
     function createTestCompilerHost(texts: NamedSourceText[], target: ScriptTarget): CompilerHost {
-        let files: Map<SourceFileWithText> = {};
-        for (let t of texts) {
-            let file = <SourceFileWithText>createSourceFile(t.name, t.text.getFullText(), target);
+        const files: Map<SourceFileWithText> = {};
+        for (const t of texts) {
+            const file = <SourceFileWithText>createSourceFile(t.name, t.text.getFullText(), target);
             file.sourceText = t.text;
             files[t.name] = file;
         }
-        
+
         return {
             getSourceFile(fileName): SourceFile {
                 return files[fileName];
             },
             getDefaultLibFileName(): string {
-                return "lib.d.ts"
+                return "lib.d.ts";
             },
             writeFile(file, text) {
                 throw new Error("NYI");
@@ -128,31 +128,31 @@ module ts {
             },
             fileExists: fileName => hasProperty(files, fileName),
             readFile: fileName => {
-                let file = lookUp(files, fileName);
+                const file = lookUp(files, fileName);
                 return file && file.text;
             }
-        }
+        };
     }
 
     function newProgram(texts: NamedSourceText[], rootNames: string[], options: CompilerOptions): Program {
-        var host = createTestCompilerHost(texts, options.target);
-        let program = <ProgramWithSourceTexts>createProgram(rootNames, options, host);
+        const host = createTestCompilerHost(texts, options.target);
+        const program = <ProgramWithSourceTexts>createProgram(rootNames, options, host);
         program.sourceTexts = texts;
         return program;
     }
 
     function updateProgram(oldProgram: Program, rootNames: string[], options: CompilerOptions, updater: (files: NamedSourceText[]) => void) {
-        var texts: NamedSourceText[] = (<ProgramWithSourceTexts>oldProgram).sourceTexts.slice(0);
+        const texts: NamedSourceText[] = (<ProgramWithSourceTexts>oldProgram).sourceTexts.slice(0);
         updater(texts);
-        var host = createTestCompilerHost(texts, options.target);
-        var program = <ProgramWithSourceTexts>createProgram(rootNames, options, host, oldProgram);
+        const host = createTestCompilerHost(texts, options.target);
+        const program = <ProgramWithSourceTexts>createProgram(rootNames, options, host, oldProgram);
         program.sourceTexts = texts;
         return program;
     }
 
     function getSizeOfMap(map: Map<any>): number {
         let size = 0;
-        for (let id in map) {
+        for (const id in map) {
             if (hasProperty(map, id)) {
                 size++;
             }
@@ -172,20 +172,20 @@ module ts {
         assert.isTrue(expected.primary === actual.primary, `'primary': expected '${expected.primary}' to be equal to '${actual.primary}'`);
     }
 
-    function checkCache<T>(caption: string, program: Program, fileName: string, expectedContent: Map<T>, getCache: (f: SourceFile) => Map<T>, entryChecker: (expected: T, original:T) => void): void {
-        let file = program.getSourceFile(fileName);
+    function checkCache<T>(caption: string, program: Program, fileName: string, expectedContent: Map<T>, getCache: (f: SourceFile) => Map<T>, entryChecker: (expected: T, original: T) => void): void {
+        const file = program.getSourceFile(fileName);
         assert.isTrue(file !== undefined, `cannot find file ${fileName}`);
-        const cache = getCache(file)
+        const cache = getCache(file);
         if (expectedContent === undefined) {
             assert.isTrue(cache === undefined, `expected ${caption} to be undefined`);
         }
         else {
             assert.isTrue(cache !== undefined, `expected ${caption} to be set`);
-            let actualCacheSize = getSizeOfMap(cache);
-            let expectedSize = getSizeOfMap(expectedContent);
+            const actualCacheSize = getSizeOfMap(cache);
+            const expectedSize = getSizeOfMap(expectedContent);
             assert.isTrue(actualCacheSize === expectedSize, `expected actual size: ${actualCacheSize} to be equal to ${expectedSize}`);
 
-            for (let id in expectedContent) {
+            for (const id in expectedContent) {
                 if (hasProperty(expectedContent, id)) {
 
                     if (expectedContent[id]) {
@@ -210,45 +210,46 @@ module ts {
     }
 
     describe("Reuse program structure", () => {
-        let target = ScriptTarget.Latest;
-        let files = [
+        /* tslint:disable no-unused-variable */
+        const target = ScriptTarget.Latest;
+        const files = [
             { name: "a.ts", text: SourceText.New(
                 `
 /// <reference path='b.ts'/>
 /// <reference path='non-existing-file.ts'/>
 /// <reference types="typerefs" />
-`, "",`var x = 1`) },
+`, "", `var x = 1`) },
             { name: "b.ts", text: SourceText.New(`/// <reference path='c.ts'/>`, "", `var y = 2`) },
             { name: "c.ts", text: SourceText.New("", "", `var z = 1;`) },
             { name: "types/typerefs/index.d.ts", text: SourceText.New("", "", `declare let z: number;`) },
-        ]
+        ];
 
         it("successful if change does not affect imports", () => {
-            var program_1 = newProgram(files, ["a.ts"], { target });
-            var program_2 = updateProgram(program_1, ["a.ts"], { target }, files => {
+            const program_1 = newProgram(files, ["a.ts"], { target });
+            const program_2 = updateProgram(program_1, ["a.ts"], { target }, files => {
                 files[0].text = files[0].text.updateProgram("var x = 100");
             });
             assert.isTrue(program_1.structureIsReused);
-            let program1Diagnostics = program_1.getSemanticDiagnostics(program_1.getSourceFile("a.ts"))
-            let program2Diagnostics = program_2.getSemanticDiagnostics(program_1.getSourceFile("a.ts"))
+            const program1Diagnostics = program_1.getSemanticDiagnostics(program_1.getSourceFile("a.ts"));
+            const program2Diagnostics = program_2.getSemanticDiagnostics(program_1.getSourceFile("a.ts"));
             assert.equal(program1Diagnostics.length, program2Diagnostics.length);
         });
 
         it("successful if change does not affect type reference directives", () => {
-            var program_1 = newProgram(files, ["a.ts"], { target });
-            var program_2 = updateProgram(program_1, ["a.ts"], { target }, files => {
+            const program_1 = newProgram(files, ["a.ts"], { target });
+            const program_2 = updateProgram(program_1, ["a.ts"], { target }, files => {
                 files[0].text = files[0].text.updateProgram("var x = 100");
             });
             assert.isTrue(program_1.structureIsReused);
-            let program1Diagnostics = program_1.getSemanticDiagnostics(program_1.getSourceFile("a.ts"))
-            let program2Diagnostics = program_2.getSemanticDiagnostics(program_1.getSourceFile("a.ts"))
+            const program1Diagnostics = program_1.getSemanticDiagnostics(program_1.getSourceFile("a.ts"));
+            const program2Diagnostics = program_2.getSemanticDiagnostics(program_1.getSourceFile("a.ts"));
             assert.equal(program1Diagnostics.length, program2Diagnostics.length);
         });
 
         it("fails if change affects tripleslash references", () => {
-            var program_1 = newProgram(files, ["a.ts"], { target });
-            var program_2 = updateProgram(program_1, ["a.ts"], { target }, files => {
-                let newReferences = `/// <reference path='b.ts'/>
+            const program_1 = newProgram(files, ["a.ts"], { target });
+            const program_2 = updateProgram(program_1, ["a.ts"], { target }, files => {
+                const newReferences = `/// <reference path='b.ts'/>
                 /// <reference path='c.ts'/>
                 `;
                 files[0].text = files[0].text.updateReferences(newReferences);
@@ -257,17 +258,17 @@ module ts {
         });
 
         it("fails if change affects imports", () => {
-            var program_1 = newProgram(files, ["a.ts"], { target });
-            var program_2 = updateProgram(program_1, ["a.ts"], { target }, files => {
+            const program_1 = newProgram(files, ["a.ts"], { target });
+            const program_2 = updateProgram(program_1, ["a.ts"], { target }, files => {
                 files[2].text = files[2].text.updateImportsAndExports("import x from 'b'");
             });
             assert.isTrue(!program_1.structureIsReused);
         });
 
         it("fails if change affects type directives", () => {
-            var program_1 = newProgram(files, ["a.ts"], { target });
-            var program_2 = updateProgram(program_1, ["a.ts"], { target }, files => {
-                let newReferences = `
+            const program_1 = newProgram(files, ["a.ts"], { target });
+            const program_2 = updateProgram(program_1, ["a.ts"], { target }, files => {
+                const newReferences = `
 /// <reference path='b.ts'/>
 /// <reference path='non-existing-file.ts'/>
 /// <reference types="typerefs1" />`;
@@ -277,35 +278,35 @@ module ts {
         });
 
         it("fails if module kind changes", () => {
-            var program_1 = newProgram(files, ["a.ts"], { target, module: ModuleKind.CommonJS });
-            var program_2 = updateProgram(program_1, ["a.ts"], { target, module: ModuleKind.AMD }, files => void 0);
+            const program_1 = newProgram(files, ["a.ts"], { target, module: ModuleKind.CommonJS });
+            const program_2 = updateProgram(program_1, ["a.ts"], { target, module: ModuleKind.AMD }, files => void 0);
             assert.isTrue(!program_1.structureIsReused);
         });
-        
+
         it("fails if rootdir changes", () => {
-            var program_1 = newProgram(files, ["a.ts"], { target, module: ModuleKind.CommonJS, rootDir: "/a/b" });
-            var program_2 = updateProgram(program_1, ["a.ts"], { target, module: ModuleKind.CommonJS, rootDir: "/a/c" }, files => void 0);
+            const program_1 = newProgram(files, ["a.ts"], { target, module: ModuleKind.CommonJS, rootDir: "/a/b" });
+            const program_2 = updateProgram(program_1, ["a.ts"], { target, module: ModuleKind.CommonJS, rootDir: "/a/c" }, files => void 0);
             assert.isTrue(!program_1.structureIsReused);
         });
 
         it("fails if config path changes", () => {
-            var program_1 = newProgram(files, ["a.ts"], { target, module: ModuleKind.CommonJS, configFilePath: "/a/b/tsconfig.json" });
-            var program_2 = updateProgram(program_1, ["a.ts"], { target, module: ModuleKind.CommonJS, configFilePath: "/a/c/tsconfig.json" }, files => void 0);
+            const program_1 = newProgram(files, ["a.ts"], { target, module: ModuleKind.CommonJS, configFilePath: "/a/b/tsconfig.json" });
+            const program_2 = updateProgram(program_1, ["a.ts"], { target, module: ModuleKind.CommonJS, configFilePath: "/a/c/tsconfig.json" }, files => void 0);
             assert.isTrue(!program_1.structureIsReused);
         });
 
         it("resolution cache follows imports", () => {
-            let files = [
+            const files = [
                 { name: "a.ts", text: SourceText.New("", "import {_} from 'b'", "var x = 1") },
                 { name: "b.ts", text: SourceText.New("", "", "var y = 2") },
             ];
-            var options: CompilerOptions = { target };
+            const options: CompilerOptions = { target };
 
-            var program_1 = newProgram(files, ["a.ts"], options);
+            const program_1 = newProgram(files, ["a.ts"], options);
             checkResolvedModulesCache(program_1, "a.ts", { "b": { resolvedFileName: "b.ts" } });
             checkResolvedModulesCache(program_1, "b.ts", undefined);
 
-            var program_2 = updateProgram(program_1, ["a.ts"], options, files => {
+            const program_2 = updateProgram(program_1, ["a.ts"], options, files => {
                 files[0].text = files[0].text.updateProgram("var x = 2");
             });
             assert.isTrue(program_1.structureIsReused);
@@ -315,14 +316,14 @@ module ts {
             checkResolvedModulesCache(program_1, "b.ts", undefined);
 
             // imports has changed - program is not reused
-            var program_3 = updateProgram(program_2, ["a.ts"], options, files => {
+            const program_3 = updateProgram(program_2, ["a.ts"], options, files => {
                 files[0].text = files[0].text.updateImportsAndExports("");
             });
             assert.isTrue(!program_2.structureIsReused);
             checkResolvedModulesCache(program_3, "a.ts", undefined);
 
-            var program_4 = updateProgram(program_3, ["a.ts"], options, files => {
-                let newImports = `import x from 'b'
+            const program_4 = updateProgram(program_3, ["a.ts"], options, files => {
+                const newImports = `import x from 'b'
                 import y from 'c'
                 `;
                 files[0].text = files[0].text.updateImportsAndExports(newImports);
@@ -332,17 +333,17 @@ module ts {
         });
 
         it("resolved type directives cache follows type directives", () => {
-            let files = [
+            const files = [
                 { name: "/a.ts", text: SourceText.New("/// <reference types='typedefs'/>", "", "var x = $") },
                 { name: "/types/typedefs/index.d.ts", text: SourceText.New("", "", "declare var $: number") },
             ];
-            var options: CompilerOptions = { target, typesRoot: "/" };
+            const options: CompilerOptions = { target, typesRoot: "/" };
 
-            var program_1 = newProgram(files, ["/a.ts"], options);
+            const program_1 = newProgram(files, ["/a.ts"], options);
             checkResolvedTypeDirectivesCache(program_1, "/a.ts", { "typedefs": { resolvedFileName: "/types/typedefs/index.d.ts", primary: true } });
             checkResolvedTypeDirectivesCache(program_1, "/types/typedefs/index.d.ts", undefined);
 
-            var program_2 = updateProgram(program_1, ["/a.ts"], options, files => {
+            const program_2 = updateProgram(program_1, ["/a.ts"], options, files => {
                 files[0].text = files[0].text.updateProgram("var x = 2");
             });
             assert.isTrue(program_1.structureIsReused);
@@ -352,15 +353,15 @@ module ts {
             checkResolvedTypeDirectivesCache(program_1, "/types/typedefs/index.d.ts", undefined);
 
             // type reference directives has changed - program is not reused
-            var program_3 = updateProgram(program_2, ["/a.ts"], options, files => {
+            const program_3 = updateProgram(program_2, ["/a.ts"], options, files => {
                 files[0].text = files[0].text.updateReferences("");
             });
 
             assert.isTrue(!program_2.structureIsReused);
             checkResolvedTypeDirectivesCache(program_3, "/a.ts", undefined);
 
-            var program_4 = updateProgram(program_3, ["/a.ts"], options, files => {
-                let newReferences = `/// <reference types="typedefs"/>
+            const program_4 = updateProgram(program_3, ["/a.ts"], options, files => {
+                const newReferences = `/// <reference types="typedefs"/>
                 /// <reference types="typedefs2"/>
                 `;
                 files[0].text = files[0].text.updateReferences(newReferences);
@@ -368,11 +369,12 @@ module ts {
             assert.isTrue(!program_3.structureIsReused);
             checkResolvedTypeDirectivesCache(program_1, "/a.ts", { "typedefs": { resolvedFileName: "/types/typedefs/index.d.ts", primary: true } });
         });
+        /* tslint:enable no-unused-variable */
     });
 
     describe("host is optional", () => {
         it("should work if host is not provided", () => {
             createProgram([], {});
-        })
+        });
     });
-}
\ No newline at end of file
+}
diff --git a/tests/cases/unittests/services/colorization.ts b/tests/cases/unittests/services/colorization.ts
index f40dc730800..ab927ebe23a 100644
--- a/tests/cases/unittests/services/colorization.ts
+++ b/tests/cases/unittests/services/colorization.ts
@@ -7,15 +7,15 @@ interface ClassificationEntry {
     position?: number;
 }
 
-describe('Colorization', function () {
+describe("Colorization", function () {
     // Use the shim adapter to ensure test coverage of the shim layer for the classifier
-    var languageServiceAdapter = new Harness.LanguageService.ShimLanguageServiceAdapter(/*preprocessToResolve*/ false);
-    var classifier = languageServiceAdapter.getClassifier();
+    const languageServiceAdapter = new Harness.LanguageService.ShimLanguageServiceAdapter(/*preprocessToResolve*/ false);
+    const classifier = languageServiceAdapter.getClassifier();
 
     function getEntryAtPosition(result: ts.ClassificationResult, position: number) {
-        var entryPosition = 0;
-        for (var i = 0, n = result.entries.length; i < n; i++) {
-            var entry = result.entries[i];
+        let entryPosition = 0;
+        for (let i = 0, n = result.entries.length; i < n; i++) {
+            const entry = result.entries[i];
             if (entryPosition === position) {
                 return entry;
             }
@@ -32,7 +32,6 @@ describe('Colorization', function () {
     function identifier(text: string, position?: number) { return createClassification(text, ts.TokenClass.Identifier, position); }
     function numberLiteral(text: string, position?: number) { return createClassification(text, ts.TokenClass.NumberLiteral, position); }
     function stringLiteral(text: string, position?: number) { return createClassification(text, ts.TokenClass.StringLiteral, position); }
-    function regExpLiteral(text: string, position?: number) { return createClassification(text, ts.TokenClass.RegExpLiteral, position); }
     function finalEndOfLineState(value: number): ClassificationEntry { return { value: value, classification: undefined, position: 0 }; }
     function createClassification(text: string, tokenClass: ts.TokenClass, position?: number): ClassificationEntry {
         return {
@@ -43,19 +42,19 @@ describe('Colorization', function () {
     }
 
     function testLexicalClassification(text: string, initialEndOfLineState: ts.EndOfLineState, ...expectedEntries: ClassificationEntry[]): void {
-        var result = classifier.getClassificationsForLine(text, initialEndOfLineState, /*syntacticClassifierAbsent*/ false);
+        const result = classifier.getClassificationsForLine(text, initialEndOfLineState, /*syntacticClassifierAbsent*/ false);
 
-        for (var i = 0, n = expectedEntries.length; i < n; i++) {
-            var expectedEntry = expectedEntries[i];
+        for (let i = 0, n = expectedEntries.length; i < n; i++) {
+            const expectedEntry = expectedEntries[i];
 
             if (expectedEntry.classification === undefined) {
                 assert.equal(result.finalLexState, expectedEntry.value, "final endOfLineState does not match expected.");
             }
             else {
-                var actualEntryPosition = expectedEntry.position !== undefined ? expectedEntry.position : text.indexOf(expectedEntry.value);
+                const actualEntryPosition = expectedEntry.position !== undefined ? expectedEntry.position : text.indexOf(expectedEntry.value);
                 assert(actualEntryPosition >= 0, "token: '" + expectedEntry.value + "' does not exit in text: '" + text + "'.");
 
-                var actualEntry = getEntryAtPosition(result, actualEntryPosition);
+                const actualEntry = getEntryAtPosition(result, actualEntryPosition);
 
                 assert(actualEntry, "Could not find classification entry for '" + expectedEntry.value + "' at position: " + actualEntryPosition);
                 assert.equal(actualEntry.classification, expectedEntry.classification, "Classification class does not match expected. Expected: " + ts.TokenClass[expectedEntry.classification] + ", Actual: " + ts.TokenClass[actualEntry.classification]);
@@ -292,7 +291,7 @@ describe('Colorization', function () {
                 stringLiteral("..."),
                 finalEndOfLineState(ts.EndOfLineState.InTemplateHeadOrNoSubstitutionTemplate));
         });
-        it("classifies the entire line of an unterminated multiline template middle/end",() => {
+        it("classifies the entire line of an unterminated multiline template middle/end", () => {
             testLexicalClassification("...",
                 ts.EndOfLineState.InTemplateMiddleOrTail,
                 stringLiteral("..."),
@@ -320,7 +319,7 @@ describe('Colorization', function () {
                 stringLiteral("}...`"),
                 finalEndOfLineState(ts.EndOfLineState.None));
         });
-        it("classifies a template middle and propagates the end of line state",() => {
+        it("classifies a template middle and propagates the end of line state", () => {
             testLexicalClassification("${ 1 + 1 }...`",
                 ts.EndOfLineState.InTemplateHeadOrNoSubstitutionTemplate,
                 stringLiteral("${"),
@@ -331,8 +330,8 @@ describe('Colorization', function () {
                 finalEndOfLineState(ts.EndOfLineState.None));
         });
         it("classifies substitution expressions with curly braces appropriately", () => {
-            var pos = 0;
-            var lastLength = 0;
+            let pos = 0;
+            let lastLength = 0;
 
             testLexicalClassification("...${ () => { } } ${ { x: `1` } }...`",
                 ts.EndOfLineState.InTemplateHeadOrNoSubstitutionTemplate,
@@ -354,7 +353,7 @@ describe('Colorization', function () {
             // Adjusts 'pos' by accounting for the length of each portion of the string,
             // but only return the last given string
             function track(...vals: string[]): string {
-                for (var i = 0, n = vals.length; i < n; i++) {
+                for (let i = 0, n = vals.length; i < n; i++) {
                     pos += lastLength;
                     lastLength = vals[i].length;
                 }
@@ -446,4 +445,4 @@ class D { }\r\n\
                 finalEndOfLineState(ts.EndOfLineState.None));
         });
     });
-});
\ No newline at end of file
+});
diff --git a/tests/cases/unittests/services/documentRegistry.ts b/tests/cases/unittests/services/documentRegistry.ts
index 50a144d3056..854fbde837e 100644
--- a/tests/cases/unittests/services/documentRegistry.ts
+++ b/tests/cases/unittests/services/documentRegistry.ts
@@ -1,79 +1,81 @@
 ///<reference path='..\..\..\..\src\harness\harness.ts' />
 
 describe("DocumentRegistry", () => {
+    /* tslint:disable no-unused-variable */
     it("documents are shared between projects", () => {
-        var documentRegistry = ts.createDocumentRegistry();
-        var defaultCompilerOptions = ts.getDefaultCompilerOptions();
+        const documentRegistry = ts.createDocumentRegistry();
+        const defaultCompilerOptions = ts.getDefaultCompilerOptions();
 
-        var f1 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
-        var f2 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
+        const f1 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
+        const f2 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
 
         assert(f1 === f2, "DocumentRegistry should return the same document for the same name");
     });
 
     it("documents are refreshed when settings in compilation settings affect syntax", () => {
-        var documentRegistry = ts.createDocumentRegistry();
-        var compilerOptions: ts.CompilerOptions = { target: ts.ScriptTarget.ES5, module: ts.ModuleKind.AMD };
+        const documentRegistry = ts.createDocumentRegistry();
+        const compilerOptions: ts.CompilerOptions = { target: ts.ScriptTarget.ES5, module: ts.ModuleKind.AMD };
 
         // change compilation setting that doesn't affect parsing - should have the same document
         compilerOptions.declaration = true;
-        var f1 = documentRegistry.acquireDocument("file1.ts", compilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
+        const f1 = documentRegistry.acquireDocument("file1.ts", compilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
         compilerOptions.declaration = false;
-        var f2 = documentRegistry.acquireDocument("file1.ts", compilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
+        const f2 = documentRegistry.acquireDocument("file1.ts", compilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
 
         assert(f1 === f2, "Expected to have the same document instance");
 
 
         // change value of compilation setting that is used during production of AST - new document is required
         compilerOptions.target = ts.ScriptTarget.ES3;
-        var f3 = documentRegistry.acquireDocument("file1.ts", compilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
+        const f3 = documentRegistry.acquireDocument("file1.ts", compilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
 
         assert(f1 !== f3, "Changed target: Expected to have different instances of document");
 
         compilerOptions.preserveConstEnums = true;
-        var f4 = documentRegistry.acquireDocument("file1.ts", compilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
+        const f4 = documentRegistry.acquireDocument("file1.ts", compilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
 
         assert(f3 === f4, "Changed preserveConstEnums: Expected to have the same instance of the document");
 
         compilerOptions.module = ts.ModuleKind.System;
-        var f5 = documentRegistry.acquireDocument("file1.ts", compilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
+        const f5 = documentRegistry.acquireDocument("file1.ts", compilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
 
         assert(f4 !== f5, "Changed module: Expected to have different instances of the document");
     });
 
     it("Acquiring document gets correct version 1", () => {
-        var documentRegistry = ts.createDocumentRegistry();
-        var defaultCompilerOptions = ts.getDefaultCompilerOptions();
+        const documentRegistry = ts.createDocumentRegistry();
+        const defaultCompilerOptions = ts.getDefaultCompilerOptions();
 
         // Simulate one LS getting the document.
-        var f1 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
+        const f1 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
 
         // Simulate another LS getting the document at another version.
-        var f2 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "2");
+        const f2 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "2");
 
         assert(f2.version === "2");
     });
 
     it("Acquiring document gets correct version 2", () => {
-        var documentRegistry = ts.createDocumentRegistry();
-        var defaultCompilerOptions = ts.getDefaultCompilerOptions();
+        const documentRegistry = ts.createDocumentRegistry();
+        const defaultCompilerOptions = ts.getDefaultCompilerOptions();
 
-        var contents = "var x = 1;"
-        var snapshot = ts.ScriptSnapshot.fromString(contents);
+        const contents = "var x = 1;";
+        const snapshot = ts.ScriptSnapshot.fromString(contents);
 
         // Always treat any change as a full change.
         snapshot.getChangeRange = old => ts.createTextChangeRange(ts.createTextSpan(0, contents.length), contents.length);
 
         // Simulate one LS getting the document.
-        var f1 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "1");
+        const f1 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "1");
 
         // Simulate another LS getting that document.
-        var f2 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "1");
+        const f2 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "1");
 
         // Now LS1 updates their document.
-        var f3 = documentRegistry.updateDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "2");
+        const f3 = documentRegistry.updateDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "2");
 
-        // Now LS2 tries to update their document.  
-        var f4 = documentRegistry.updateDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "3");
+        // Now LS2 tries to update their document.
+        const f4 = documentRegistry.updateDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "3");
     });
-});
\ No newline at end of file
+    /* tslint:enable no-unused-variable */
+});
diff --git a/tests/cases/unittests/services/patternMatcher.ts b/tests/cases/unittests/services/patternMatcher.ts
index 21f62507f4a..5fbe0ea1588 100644
--- a/tests/cases/unittests/services/patternMatcher.ts
+++ b/tests/cases/unittests/services/patternMatcher.ts
@@ -1,10 +1,10 @@
 /// <reference path="..\..\..\..\src\harness\external\mocha.d.ts" />
 /// <reference path="..\..\..\..\src\services\patternMatcher.ts" />
 
-describe('PatternMatcher', function () {
+describe("PatternMatcher", function () {
     describe("BreakIntoCharacterSpans", function () {
         it("EmptyIdentifier", () => {
-            verifyBreakIntoCharacterSpans("")
+            verifyBreakIntoCharacterSpans("");
         });
 
         it("SimpleIdentifier", () => {
@@ -96,35 +96,35 @@ describe('PatternMatcher', function () {
 
     describe("SingleWordPattern", () => {
         it("PreferCaseSensitiveExact", () => {
-            var match = getFirstMatch("Foo", "Foo");
+            const match = getFirstMatch("Foo", "Foo");
 
             assert.equal(ts.PatternMatchKind.exact, match.kind);
             assert.equal(true, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitiveExactInsensitive", () => {
-            var match = getFirstMatch("foo", "Foo");
+            const match = getFirstMatch("foo", "Foo");
 
             assert.equal(ts.PatternMatchKind.exact, match.kind);
             assert.equal(false, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitivePrefix", () => {
-            var match = getFirstMatch("Foo", "Fo");
+            const match = getFirstMatch("Foo", "Fo");
 
             assert.equal(ts.PatternMatchKind.prefix, match.kind);
             assert.equal(true, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitivePrefixCaseInsensitive", () => {
-            var match = getFirstMatch("Foo", "fo");
+            const match = getFirstMatch("Foo", "fo");
 
             assert.equal(ts.PatternMatchKind.prefix, match.kind);
             assert.equal(false, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitiveCamelCaseMatchSimple", () => {
-            var match = getFirstMatch("FogBar", "FB");
+            const match = getFirstMatch("FogBar", "FB");
 
             assert.equal(ts.PatternMatchKind.camelCase, match.kind);
             assert.equal(true, match.isCaseSensitive);
@@ -132,156 +132,156 @@ describe('PatternMatcher', function () {
         });
 
         it("PreferCaseSensitiveCamelCaseMatchPartialPattern", () => {
-            var match = getFirstMatch("FogBar", "FoB");
+            const match = getFirstMatch("FogBar", "FoB");
 
             assert.equal(ts.PatternMatchKind.camelCase, match.kind);
             assert.equal(true, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitiveCamelCaseMatchToLongPattern1", () => {
-            var match = getFirstMatch("FogBar", "FBB");
+            const match = getFirstMatch("FogBar", "FBB");
 
             assert.isTrue(match === undefined);
         });
 
         it("PreferCaseSensitiveCamelCaseMatchToLongPattern2", () => {
-            var match = getFirstMatch("FogBar", "FoooB");
+            const match = getFirstMatch("FogBar", "FoooB");
 
             assert.isTrue(match === undefined);
         });
 
         it("CamelCaseMatchPartiallyUnmatched", () => {
-            var match = getFirstMatch("FogBarBaz", "FZ");
+            const match = getFirstMatch("FogBarBaz", "FZ");
 
             assert.isTrue(match === undefined);
         });
 
         it("CamelCaseMatchCompletelyUnmatched", () => {
-            var match = getFirstMatch("FogBarBaz", "ZZ");
+            const match = getFirstMatch("FogBarBaz", "ZZ");
 
             assert.isTrue(match === undefined);
         });
 
         it("TwoUppercaseCharacters", () => {
-            var match = getFirstMatch("SimpleUIElement", "SiUI");
+            const match = getFirstMatch("SimpleUIElement", "SiUI");
 
             assert.equal(ts.PatternMatchKind.camelCase, match.kind);
             assert.equal(true, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitiveLowercasePattern", () => {
-            var match = getFirstMatch("FogBar", "b");
+            const match = getFirstMatch("FogBar", "b");
 
             assert.equal(ts.PatternMatchKind.substring, match.kind);
             assert.equal(false, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitiveLowercasePattern2", () => {
-            var match = getFirstMatch("FogBar", "fB");
+            const match = getFirstMatch("FogBar", "fB");
 
             assert.equal(ts.PatternMatchKind.camelCase, match.kind);
             assert.equal(false, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitiveTryUnderscoredName", () => {
-            var match = getFirstMatch("_fogBar", "_fB");
+            const match = getFirstMatch("_fogBar", "_fB");
 
             assert.equal(ts.PatternMatchKind.camelCase, match.kind);
             assert.equal(true, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitiveTryUnderscoredName2", () => {
-            var match = getFirstMatch("_fogBar", "fB");
+            const match = getFirstMatch("_fogBar", "fB");
 
             assert.equal(ts.PatternMatchKind.camelCase, match.kind);
             assert.equal(true, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitiveTryUnderscoredNameInsensitive", () => {
-            var match = getFirstMatch("_FogBar", "_fB");
+            const match = getFirstMatch("_FogBar", "_fB");
 
             assert.equal(ts.PatternMatchKind.camelCase, match.kind);
             assert.equal(false, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitiveMiddleUnderscore", () => {
-            var match = getFirstMatch("Fog_Bar", "FB");
+            const match = getFirstMatch("Fog_Bar", "FB");
 
             assert.equal(ts.PatternMatchKind.camelCase, match.kind);
             assert.equal(true, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitiveMiddleUnderscore2", () => {
-            var match = getFirstMatch("Fog_Bar", "F_B");
+            const match = getFirstMatch("Fog_Bar", "F_B");
 
             assert.equal(ts.PatternMatchKind.camelCase, match.kind);
             assert.equal(true, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitiveMiddleUnderscore3", () => {
-            var match = getFirstMatch("Fog_Bar", "F__B");
+            const match = getFirstMatch("Fog_Bar", "F__B");
 
             assert.isTrue(undefined === match);
         });
 
         it("PreferCaseSensitiveMiddleUnderscore4", () => {
-            var match = getFirstMatch("Fog_Bar", "f_B");
+            const match = getFirstMatch("Fog_Bar", "f_B");
 
             assert.equal(ts.PatternMatchKind.camelCase, match.kind);
             assert.equal(false, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitiveMiddleUnderscore5", () => {
-            var match = getFirstMatch("Fog_Bar", "F_b");
+            const match = getFirstMatch("Fog_Bar", "F_b");
 
             assert.equal(ts.PatternMatchKind.camelCase, match.kind);
             assert.equal(false, match.isCaseSensitive);
         });
 
         it("PreferCaseSensitiveRelativeWeights1", () => {
-            var match1 = getFirstMatch("FogBarBaz", "FB");
-            var match2 = getFirstMatch("FooFlobBaz", "FB");
-            
+            const match1 = getFirstMatch("FogBarBaz", "FB");
+            const match2 = getFirstMatch("FooFlobBaz", "FB");
+
             // We should prefer something that starts at the beginning if possible
             assertInRange(match1.camelCaseWeight, match2.camelCaseWeight + 1, 1 << 30);
         });
 
         it("PreferCaseSensitiveRelativeWeights2", () => {
-            var match1 = getFirstMatch("BazBarFooFooFoo", "FFF");
-            var match2 = getFirstMatch("BazFogBarFooFoo", "FFF");
+            const match1 = getFirstMatch("BazBarFooFooFoo", "FFF");
+            const match2 = getFirstMatch("BazFogBarFooFoo", "FFF");
 
             // Contiguous things should also be preferred
             assertInRange(match1.camelCaseWeight, match2.camelCaseWeight + 1, 1 << 30);
         });
 
         it("PreferCaseSensitiveRelativeWeights3", () => {
-            var match1 = getFirstMatch("FogBarFooFoo", "FFF");
-            var match2 = getFirstMatch("BarFooFooFoo", "FFF");
+            const match1 = getFirstMatch("FogBarFooFoo", "FFF");
+            const match2 = getFirstMatch("BarFooFooFoo", "FFF");
 
             // The weight of being first should be greater than the weight of being contiguous
             assertInRange(match1.camelCaseWeight, match2.camelCaseWeight + 1, 1 << 30);
         });
 
         it("AllLowerPattern1", () => {
-            var match = getFirstMatch("FogBarChangedEventArgs", "changedeventargs");
+            const match = getFirstMatch("FogBarChangedEventArgs", "changedeventargs");
 
             assert.isTrue(undefined !== match);
         });
 
         it("AllLowerPattern2", () => {
-            var match = getFirstMatch("FogBarChangedEventArgs", "changedeventarrrgh");
+            const match = getFirstMatch("FogBarChangedEventArgs", "changedeventarrrgh");
 
             assert.isTrue(undefined === match);
         });
 
         it("AllLowerPattern3", () => {
-            var match = getFirstMatch("ABCDEFGH", "bcd");
+            const match = getFirstMatch("ABCDEFGH", "bcd");
 
             assert.isTrue(undefined !== match);
         });
 
         it("AllLowerPattern4", () => {
-            var match = getFirstMatch("AbcdefghijEfgHij", "efghij");
+            const match = getFirstMatch("AbcdefghijEfgHij", "efghij");
 
             assert.isTrue(undefined === match);
         });
@@ -289,144 +289,144 @@ describe('PatternMatcher', function () {
 
     describe("MultiWordPattern", () => {
         it("ExactWithLowercase", () => {
-            var matches = getAllMatches("AddMetadataReference", "addmetadatareference");
+            const matches = getAllMatches("AddMetadataReference", "addmetadatareference");
 
             assertContainsKind(ts.PatternMatchKind.exact, matches);
         });
 
         it("SingleLowercasedSearchWord1", () => {
-            var matches = getAllMatches("AddMetadataReference", "add");
+            const matches = getAllMatches("AddMetadataReference", "add");
 
             assertContainsKind(ts.PatternMatchKind.prefix, matches);
         });
 
         it("SingleLowercasedSearchWord2", () => {
-            var matches = getAllMatches("AddMetadataReference", "metadata");
+            const matches = getAllMatches("AddMetadataReference", "metadata");
 
             assertContainsKind(ts.PatternMatchKind.substring, matches);
         });
 
         it("SingleUppercaseSearchWord1", () => {
-            var matches = getAllMatches("AddMetadataReference", "Add");
+            const matches = getAllMatches("AddMetadataReference", "Add");
 
             assertContainsKind(ts.PatternMatchKind.prefix, matches);
         });
 
         it("SingleUppercaseSearchWord2", () => {
-            var matches = getAllMatches("AddMetadataReference", "Metadata");
+            const matches = getAllMatches("AddMetadataReference", "Metadata");
 
             assertContainsKind(ts.PatternMatchKind.substring, matches);
         });
 
         it("SingleUppercaseSearchLetter1", () => {
-            var matches = getAllMatches("AddMetadataReference", "A");
+            const matches = getAllMatches("AddMetadataReference", "A");
 
             assertContainsKind(ts.PatternMatchKind.prefix, matches);
         });
 
         it("SingleUppercaseSearchLetter2", () => {
-            var matches = getAllMatches("AddMetadataReference", "M");
+            const matches = getAllMatches("AddMetadataReference", "M");
 
             assertContainsKind(ts.PatternMatchKind.substring, matches);
         });
 
         it("TwoLowercaseWords", () => {
-            var matches = getAllMatches("AddMetadataReference", "add metadata");
+            const matches = getAllMatches("AddMetadataReference", "add metadata");
 
             assertContainsKind(ts.PatternMatchKind.prefix, matches);
             assertContainsKind(ts.PatternMatchKind.substring, matches);
         });
 
         it("TwoLowercaseWords", () => {
-            var matches = getAllMatches("AddMetadataReference", "A M");
+            const matches = getAllMatches("AddMetadataReference", "A M");
 
             assertContainsKind(ts.PatternMatchKind.prefix, matches);
             assertContainsKind(ts.PatternMatchKind.substring, matches);
         });
 
         it("TwoLowercaseWords", () => {
-            var matches = getAllMatches("AddMetadataReference", "AM");
+            const matches = getAllMatches("AddMetadataReference", "AM");
 
             assertContainsKind(ts.PatternMatchKind.camelCase, matches);
         });
 
         it("TwoLowercaseWords", () => {
-            var matches = getAllMatches("AddMetadataReference", "ref Metadata")
+            const matches = getAllMatches("AddMetadataReference", "ref Metadata");
 
             assertArrayEquals(ts.map(matches, m => m.kind), [ts.PatternMatchKind.substring, ts.PatternMatchKind.substring]);
         });
 
         it("TwoLowercaseWords", () => {
-            var matches = getAllMatches("AddMetadataReference", "ref M")
+            const matches = getAllMatches("AddMetadataReference", "ref M");
 
             assertArrayEquals(ts.map(matches, m => m.kind), [ts.PatternMatchKind.substring, ts.PatternMatchKind.substring]);
         });
 
         it("MixedCamelCase", () => {
-            var matches = getAllMatches("AddMetadataReference", "AMRe");
+            const matches = getAllMatches("AddMetadataReference", "AMRe");
 
             assertContainsKind(ts.PatternMatchKind.camelCase, matches);
         });
 
         it("BlankPattern", () => {
-            var matches = getAllMatches("AddMetadataReference", "");
+            const matches = getAllMatches("AddMetadataReference", "");
 
             assert.isTrue(matches === undefined);
         });
 
         it("WhitespaceOnlyPattern", () => {
-            var matches = getAllMatches("AddMetadataReference", " ");
+            const matches = getAllMatches("AddMetadataReference", " ");
 
             assert.isTrue(matches === undefined);
         });
 
         it("EachWordSeparately1", () => {
-            var matches = getAllMatches("AddMetadataReference", "add Meta");
+            const matches = getAllMatches("AddMetadataReference", "add Meta");
 
             assertContainsKind(ts.PatternMatchKind.prefix, matches);
             assertContainsKind(ts.PatternMatchKind.substring, matches);
         });
 
         it("EachWordSeparately2", () => {
-            var matches = getAllMatches("AddMetadataReference", "Add meta");
+            const matches = getAllMatches("AddMetadataReference", "Add meta");
 
             assertContainsKind(ts.PatternMatchKind.prefix, matches);
             assertContainsKind(ts.PatternMatchKind.substring, matches);
         });
 
         it("EachWordSeparately3", () => {
-            var matches = getAllMatches("AddMetadataReference", "Add Meta");
+            const matches = getAllMatches("AddMetadataReference", "Add Meta");
 
             assertContainsKind(ts.PatternMatchKind.prefix, matches);
             assertContainsKind(ts.PatternMatchKind.substring, matches);
         });
 
         it("MixedCasing", () => {
-            var matches = getAllMatches("AddMetadataReference", "mEta");
+            const matches = getAllMatches("AddMetadataReference", "mEta");
 
             assert.isTrue(matches === undefined);
         });
 
         it("MixedCasing2", () => {
-            var matches = getAllMatches("AddMetadataReference", "Data");
+            const matches = getAllMatches("AddMetadataReference", "Data");
 
             assert.isTrue(matches === undefined);
         });
 
         it("AsteriskSplit", () => {
-            var matches = getAllMatches("GetKeyWord", "K*W");
+            const matches = getAllMatches("GetKeyWord", "K*W");
 
             assertArrayEquals(ts.map(matches, m => m.kind), [ts.PatternMatchKind.substring, ts.PatternMatchKind.substring]);
         });
 
         it("LowercaseSubstring1", () => {
-            var matches = getAllMatches("Operator", "a");
+            const matches = getAllMatches("Operator", "a");
 
             assert.isTrue(matches === undefined);
         });
 
         it("LowercaseSubstring2", () => {
-            var matches = getAllMatches("FooAttribute", "a");
+            const matches = getAllMatches("FooAttribute", "a");
             assertContainsKind(ts.PatternMatchKind.substring, matches);
             assert.isFalse(matches[0].isCaseSensitive);
         });
@@ -434,49 +434,49 @@ describe('PatternMatcher', function () {
 
     describe("DottedPattern", () => {
         it("DottedPattern1", () => {
-            var match = getFirstMatchForDottedPattern("Foo.Bar.Baz", "Quux", "B.Q");
+            const match = getFirstMatchForDottedPattern("Foo.Bar.Baz", "Quux", "B.Q");
 
             assert.equal(ts.PatternMatchKind.prefix, match.kind);
             assert.equal(true, match.isCaseSensitive);
         });
 
         it("DottedPattern2", () => {
-            var match = getFirstMatchForDottedPattern("Foo.Bar.Baz", "Quux", "C.Q");
+            const match = getFirstMatchForDottedPattern("Foo.Bar.Baz", "Quux", "C.Q");
             assert.isTrue(match === undefined);
         });
 
         it("DottedPattern3", () => {
-            var match = getFirstMatchForDottedPattern("Foo.Bar.Baz", "Quux", "B.B.Q");
+            const match = getFirstMatchForDottedPattern("Foo.Bar.Baz", "Quux", "B.B.Q");
             assert.equal(ts.PatternMatchKind.prefix, match.kind);
             assert.equal(true, match.isCaseSensitive);
         });
 
         it("DottedPattern4", () => {
-            var match = getFirstMatchForDottedPattern("Foo.Bar.Baz", "Quux", "Baz.Quux");
+            const match = getFirstMatchForDottedPattern("Foo.Bar.Baz", "Quux", "Baz.Quux");
             assert.equal(ts.PatternMatchKind.exact, match.kind);
             assert.equal(true, match.isCaseSensitive);
         });
 
         it("DottedPattern5", () => {
-            var match = getFirstMatchForDottedPattern("Foo.Bar.Baz", "Quux", "F.B.B.Quux");
+            const match = getFirstMatchForDottedPattern("Foo.Bar.Baz", "Quux", "F.B.B.Quux");
             assert.equal(ts.PatternMatchKind.exact, match.kind);
             assert.equal(true, match.isCaseSensitive);
         });
 
         it("DottedPattern6", () => {
-            var match = getFirstMatchForDottedPattern("Foo.Bar.Baz", "Quux", "F.F.B.B.Quux");
+            const match = getFirstMatchForDottedPattern("Foo.Bar.Baz", "Quux", "F.F.B.B.Quux");
             assert.isTrue(match === undefined);
         });
 
         it("DottedPattern7", () => {
-            var match = getFirstMatch("UIElement", "UIElement");
-            var match = getFirstMatch("GetKeyword", "UIElement");
+            let match = getFirstMatch("UIElement", "UIElement");
+            match = getFirstMatch("GetKeyword", "UIElement");
             assert.isTrue(match === undefined);
         });
     });
 
     function getFirstMatch(candidate: string, pattern: string): ts.PatternMatch {
-        var matches = ts.createPatternMatcher(pattern).getMatchesForLastSegmentOfPattern(candidate);
+        const matches = ts.createPatternMatcher(pattern).getMatchesForLastSegmentOfPattern(candidate);
         return matches ? matches[0] : undefined;
     }
 
@@ -485,7 +485,7 @@ describe('PatternMatcher', function () {
     }
 
     function getFirstMatchForDottedPattern(dottedContainer: string, candidate: string, pattern: string): ts.PatternMatch {
-        var matches = ts.createPatternMatcher(pattern).getMatches(dottedContainer.split("."), candidate);
+        const matches = ts.createPatternMatcher(pattern).getMatches(dottedContainer.split("."), candidate);
         return matches ? matches[0] : undefined;
     }
 
@@ -503,7 +503,7 @@ describe('PatternMatcher', function () {
     function assertArrayEquals<T>(array1: T[], array2: T[]) {
         assert.equal(array1.length, array2.length);
 
-        for (var i = 0, n = array1.length; i < n; i++) {
+        for (let i = 0, n = array1.length; i < n; i++) {
             assert.equal(array1[i], array2[i]);
         }
     }
@@ -524,4 +524,4 @@ describe('PatternMatcher', function () {
     function assertContainsKind(kind: ts.PatternMatchKind, results: ts.PatternMatch[]) {
         assert.isTrue(ts.forEach(results, r => r.kind === kind));
     }
-});
\ No newline at end of file
+});
diff --git a/tests/cases/unittests/services/preProcessFile.ts b/tests/cases/unittests/services/preProcessFile.ts
index 7fa25b440c5..22a911b1601 100644
--- a/tests/cases/unittests/services/preProcessFile.ts
+++ b/tests/cases/unittests/services/preProcessFile.ts
@@ -2,12 +2,14 @@
 /// <reference path="..\..\..\..\src\harness\harnessLanguageService.ts" />
 
 declare namespace chai.assert {
+    /* tslint:disable no-unused-variable */
     function deepEqual(actual: any, expected: any): void;
+    /* tslint:enable no-unused-variable */
 }
 
-describe('PreProcessFile:', function () {
+describe("PreProcessFile:", function () {
     function test(sourceText: string, readImportFile: boolean, detectJavaScriptImports: boolean, expectedPreProcess: ts.PreProcessedFileInfo): void {
-        var resultPreProcess = ts.preProcessFile(sourceText, readImportFile, detectJavaScriptImports);
+        const resultPreProcess = ts.preProcessFile(sourceText, readImportFile, detectJavaScriptImports);
 
         assert.equal(resultPreProcess.isLibFile, expectedPreProcess.isLibFile, "Pre-processed file has different value for isLibFile. Expected: " + expectedPreProcess.isLibFile + ". Actual: " + resultPreProcess.isLibFile);
 
@@ -27,20 +29,20 @@ describe('PreProcessFile:', function () {
         }
         assert.equal(actual.length, expected.length, `[${kind}] Actual array's length does not match expected length. Expected files: ${JSON.stringify(expected)}, actual files: ${JSON.stringify(actual)}`);
 
-        for (var i = 0; i < expected.length; ++i) {
-            var actualReference = actual[i];
-            var expectedReference = expected[i];
+        for (let i = 0; i < expected.length; i++) {
+            const actualReference = actual[i];
+            const expectedReference = expected[i];
             assert.equal(actualReference.fileName, expectedReference.fileName, `[${kind}] actual file path does not match expected. Expected: "${expectedReference.fileName}". Actual: "${actualReference.fileName}".`);
             assert.equal(actualReference.pos, expectedReference.pos, `[${kind}] actual file start position does not match expected. Expected: "${expectedReference.pos}". Actual: "${actualReference.pos}".`);
             assert.equal(actualReference.end, expectedReference.end, `[${kind}] actual file end pos does not match expected. Expected: "${expectedReference.end}". Actual: "${actualReference.end}".`);
         }
     }
-    
+
     describe("Test preProcessFiles,", function () {
         it("Correctly return referenced files from triple slash", function () {
-            test("///<reference path = \"refFile1.ts\" />" + "\n" + "///<reference path =\"refFile2.ts\"/>" + "\n" + "///<reference path=\"refFile3.ts\" />" + "\n" + "///<reference path= \"..\\refFile4d.ts\" />", 
-                /* readImports */true,
-                /* detectJavaScriptImports */ false,
+            test("///<reference path = \"refFile1.ts\" />" + "\n" + "///<reference path =\"refFile2.ts\"/>" + "\n" + "///<reference path=\"refFile3.ts\" />" + "\n" + "///<reference path= \"..\\refFile4d.ts\" />",
+                /*readImportFile*/true,
+                /*detectJavaScriptImports*/ false,
                 {
                     referencedFiles: [{ fileName: "refFile1.ts", pos: 0, end: 37 }, { fileName: "refFile2.ts", pos: 38, end: 73 },
                         { fileName: "refFile3.ts", pos: 74, end: 109 }, { fileName: "..\\refFile4d.ts", pos: 110, end: 150 }],
@@ -53,8 +55,8 @@ describe('PreProcessFile:', function () {
 
         it("Do not return reference path because of invalid triple-slash syntax", function () {
             test("///<reference path\"refFile1.ts\" />" + "\n" + "///<reference path =\"refFile2.ts\">" + "\n" + "///<referencepath=\"refFile3.ts\" />" + "\n" + "///<reference pat= \"refFile4d.ts\" />",
-                /* readImports */true,
-                /* detectJavaScriptImports */ false,
+                /*readImportFile*/true,
+                /*detectJavaScriptImports*/ false,
                 {
                     referencedFiles: <ts.FileReference[]>[],
                     importedFiles: <ts.FileReference[]>[],
@@ -66,8 +68,8 @@ describe('PreProcessFile:', function () {
 
         it("Correctly return imported files", function () {
             test("import i1 = require(\"r1.ts\"); import i2 =require(\"r2.ts\"); import i3= require(\"r3.ts\"); import i4=require(\"r4.ts\"); import i5 = require  (\"r5.ts\");",
-                /* readImports */true,
-                /* detectJavaScriptImports */ false,
+                /*readImportFile*/true,
+                /*detectJavaScriptImports*/ false,
                 {
                     referencedFiles: <ts.FileReference[]>[],
                     typeReferenceDirectives: [],
@@ -80,8 +82,8 @@ describe('PreProcessFile:', function () {
 
         it("Do not return imported files if readImportFiles argument is false", function () {
             test("import i1 = require(\"r1.ts\"); import i2 =require(\"r2.ts\"); import i3= require(\"r3.ts\"); import i4=require(\"r4.ts\"); import i5 = require  (\"r5.ts\");",
-                /* readImports */ false,
-                /* detectJavaScriptImports */ false,
+                /*readImportFile*/ false,
+                /*detectJavaScriptImports*/ false,
                 {
                     referencedFiles: <ts.FileReference[]>[],
                     typeReferenceDirectives: [],
@@ -93,8 +95,8 @@ describe('PreProcessFile:', function () {
 
         it("Do not return import path because of invalid import syntax", function () {
             test("import i1 require(\"r1.ts\"); import = require(\"r2.ts\") import i3= require(\"r3.ts\"); import i5",
-                /* readImports */true,
-                /* detectJavaScriptImports */ false,
+                /*readImportFile*/true,
+                /*detectJavaScriptImports*/ false,
                 {
                     referencedFiles: <ts.FileReference[]>[],
                     typeReferenceDirectives: [],
@@ -106,8 +108,8 @@ describe('PreProcessFile:', function () {
 
         it("Correctly return referenced files and import files", function () {
             test("///<reference path=\"refFile1.ts\" />" + "\n" + "///<reference path =\"refFile2.ts\"/>" + "\n" + "import i1 = require(\"r1.ts\"); import i2 =require(\"r2.ts\");",
-                /* readImports */true,
-                /* detectJavaScriptImports */ false,
+                /*readImportFile*/true,
+                /*detectJavaScriptImports*/ false,
                 {
                     referencedFiles: [{ fileName: "refFile1.ts", pos: 0, end: 35 }, { fileName: "refFile2.ts", pos: 36, end: 71 }],
                     typeReferenceDirectives: [],
@@ -119,15 +121,15 @@ describe('PreProcessFile:', function () {
 
         it("Correctly return referenced files and import files even with some invalid syntax", function () {
             test("///<reference path=\"refFile1.ts\" />" + "\n" + "///<reference path \"refFile2.ts\"/>" + "\n" + "import i1 = require(\"r1.ts\"); import = require(\"r2.ts\"); import i2 = require(\"r3.ts\");",
-                /* readImports */true,
-                /* detectJavaScriptImports */ false,
+                /*readImportFile*/true,
+                /*detectJavaScriptImports*/ false,
                 {
                     referencedFiles: [{ fileName: "refFile1.ts", pos: 0, end: 35 }],
                     typeReferenceDirectives: [],
                     importedFiles: [{ fileName: "r1.ts", pos: 91, end: 96 }, { fileName: "r3.ts", pos: 148, end: 153 }],
                     ambientExternalModules: undefined,
                     isLibFile: false
-                })
+                });
         });
 
         it("Correctly return ES6 imports", function () {
@@ -138,8 +140,8 @@ describe('PreProcessFile:', function () {
                 "import {a as A} from \"m5\";" + "\n" +
                 "import {a as A, b, c as C} from \"m6\";" + "\n" +
                 "import def , {a, b, c as C} from \"m7\";" + "\n",
-                /* readImports */true,
-                /* detectJavaScriptImports */ false,
+                /*readImportFile*/true,
+                /*detectJavaScriptImports*/ false,
                 {
                     referencedFiles: [],
                     typeReferenceDirectives: [],
@@ -154,7 +156,7 @@ describe('PreProcessFile:', function () {
                     ],
                     ambientExternalModules: undefined,
                     isLibFile: false
-                })
+                });
         });
 
         it("Correctly return ES6 exports", function () {
@@ -162,8 +164,8 @@ describe('PreProcessFile:', function () {
                 "export {a} from \"m2\";" + "\n" +
                 "export {a as A} from \"m3\";" + "\n" +
                 "export {a as A, b, c as C} from \"m4\";" + "\n",
-                /* readImports */true,
-                /* detectJavaScriptImports */ false,
+                /*readImportFile*/true,
+                /*detectJavaScriptImports*/ false,
                 {
                     referencedFiles: [],
                     typeReferenceDirectives: [],
@@ -175,32 +177,32 @@ describe('PreProcessFile:', function () {
                     ],
                     ambientExternalModules: undefined,
                     isLibFile: false
-                })
+                });
         });
-        
+
         it("Correctly return ambient external modules", () => {
            test(`
                declare module A {}
                declare module "B" {}
                function foo() {
                }
-               `, 
-                /* readImports */ true,
-                /* detectJavaScriptImports */ false,
- 
+               `,
+                /*readImportFile*/ true,
+                /*detectJavaScriptImports*/ false,
+
                {
                    referencedFiles: [],
                    typeReferenceDirectives: [],
                    importedFiles: [],
                    ambientExternalModules: ["B"],
                    isLibFile: false
-               })  
+               });
         });
 
         it("Correctly handles export import declarations", function () {
             test("export import a = require(\"m1\");",
-                /* readImports */true,
-                /* detectJavaScriptImports */ false,
+                /*readImportFile*/true,
+                /*detectJavaScriptImports*/ false,
                 {
                     referencedFiles: [],
                     typeReferenceDirectives: [],
@@ -209,7 +211,7 @@ describe('PreProcessFile:', function () {
                     ],
                     ambientExternalModules: undefined,
                     isLibFile: false
-                })
+                });
         });
         it("Correctly handles export require calls in JavaScript files", function () {
             test(`
@@ -218,8 +220,8 @@ describe('PreProcessFile:', function () {
             foo(require('m3'));
             var z = { f: require('m4') }
             `,
-                /* readImports */true,
-                /* detectJavaScriptImports */ true,
+                /*readImportFile*/true,
+                /*detectJavaScriptImports*/ true,
                 {
                     referencedFiles: [],
                     typeReferenceDirectives: [],
@@ -231,15 +233,15 @@ describe('PreProcessFile:', function () {
                     ],
                     ambientExternalModules: undefined,
                     isLibFile: false
-                })
+                });
         });
         it("Correctly handles dependency lists in define([deplist]) calls in JavaScript files", function () {
             test(`
             define(["mod1", "mod2"], (m1, m2) => {
             });
             `,
-                /* readImports */true,
-                /* detectJavaScriptImports */ true,
+                /*readImportFile*/true,
+                /*detectJavaScriptImports*/ true,
                 {
                     referencedFiles: [],
                     typeReferenceDirectives: [],
@@ -249,15 +251,15 @@ describe('PreProcessFile:', function () {
                     ],
                     ambientExternalModules: undefined,
                     isLibFile: false
-                })
+                });
         });
         it("Correctly handles dependency lists in define(modName, [deplist]) calls in JavaScript files", function () {
             test(`
             define("mod", ["mod1", "mod2"], (m1, m2) => {
             });
             `,
-                /* readImports */true,
-                /* detectJavaScriptImports */ true,
+                /*readImportFile*/true,
+                /*detectJavaScriptImports*/ true,
                 {
                     referencedFiles: [],
                     typeReferenceDirectives: [],
@@ -267,16 +269,16 @@ describe('PreProcessFile:', function () {
                     ],
                     ambientExternalModules: undefined,
                     isLibFile: false
-                })
+                });
         });
         it("correctly handles augmentations in external modules - 1", () => {
             test(`
             declare module "../Observable" {
                 interface I {}
             }
-            
+
             export {}
-            `, 
+            `,
             /*readImportFile*/ true,
             /*detectJavaScriptImports*/ false,
             {
@@ -287,49 +289,49 @@ describe('PreProcessFile:', function () {
                 ],
                 ambientExternalModules: undefined,
                 isLibFile: false
-            })
+            });
         });
         it("correctly handles augmentations in external modules - 2", () => {
             test(`
             declare module "../Observable" {
                 interface I {}
             }
-            
+
             import * as x from "m";
-            `, 
+            `,
             /*readImportFile*/ true,
             /*detectJavaScriptImports*/ false,
             {
                 referencedFiles: [],
                 typeReferenceDirectives: [],
                 importedFiles: [
-                    { "fileName": "m", "pos": 135, "end": 136 },
+                    { "fileName": "m", "pos": 123, "end": 124 },
                     { "fileName": "../Observable", "pos": 28, "end": 41 }
                 ],
                 ambientExternalModules: undefined,
                 isLibFile: false
-            })
+            });
         });
         it("correctly handles augmentations in external modules - 3", () => {
             test(`
             declare module "../Observable" {
                 interface I {}
             }
-            
+
             import m = require("m");
-            `, 
+            `,
             /*readImportFile*/ true,
             /*detectJavaScriptImports*/ false,
             {
                 referencedFiles: [],
                 typeReferenceDirectives: [],
                 importedFiles: [
-                    { "fileName": "m", "pos": 135, "end": 136 },
+                    { "fileName": "m", "pos": 123, "end": 124 },
                     { "fileName": "../Observable", "pos": 28, "end": 41 }
                 ],
                 ambientExternalModules: undefined,
                 isLibFile: false
-            })
+            });
         });
         it("correctly handles augmentations in external modules - 4", () => {
             test(`
@@ -338,7 +340,7 @@ describe('PreProcessFile:', function () {
             }
             namespace N {}
             export = N;
-            `, 
+            `,
             /*readImportFile*/ true,
             /*detectJavaScriptImports*/ false,
             {
@@ -349,7 +351,7 @@ describe('PreProcessFile:', function () {
                 ],
                 ambientExternalModules: undefined,
                 isLibFile: false
-            })
+            });
         });
         it("correctly handles augmentations in external modules - 5", () => {
             test(`
@@ -358,7 +360,7 @@ describe('PreProcessFile:', function () {
             }
             namespace N {}
             export import IN = N;
-            `, 
+            `,
             /*readImportFile*/ true,
             /*detectJavaScriptImports*/ false,
             {
@@ -369,7 +371,7 @@ describe('PreProcessFile:', function () {
                 ],
                 ambientExternalModules: undefined,
                 isLibFile: false
-            })
+            });
         });
         it("correctly handles augmentations in external modules - 6", () => {
             test(`
@@ -377,7 +379,7 @@ describe('PreProcessFile:', function () {
                 interface I {}
             }
             export let x = 1;
-            `, 
+            `,
             /*readImportFile*/ true,
             /*detectJavaScriptImports*/ false,
             {
@@ -388,7 +390,7 @@ describe('PreProcessFile:', function () {
                 ],
                 ambientExternalModules: undefined,
                 isLibFile: false
-            })
+            });
         });
         it ("correctly handles augmentations in ambient external modules - 1", () => {
             test(`
@@ -398,7 +400,7 @@ describe('PreProcessFile:', function () {
                     interface I {}
                 }
             }
-            `, 
+            `,
             /*readImportFile*/ true,
             /*detectJavaScriptImports*/ false,
             {
@@ -422,7 +424,7 @@ describe('PreProcessFile:', function () {
                     interface I {}
                 }
             }
-            `, 
+            `,
             /*readImportFile*/ true,
             /*detectJavaScriptImports*/ false,
             {
@@ -458,7 +460,7 @@ describe('PreProcessFile:', function () {
                 ambientExternalModules: undefined,
                 isLibFile: false
             });
-        })
+        });
     });
 });
 
diff --git a/tests/cases/unittests/session.ts b/tests/cases/unittests/session.ts
index a90f7d2ec84..1dcc3d9d68a 100644
--- a/tests/cases/unittests/session.ts
+++ b/tests/cases/unittests/session.ts
@@ -111,23 +111,31 @@ namespace ts.server {
                     }
                     const req: protocol.Request = {
                         command: name,
-                        seq: i++,
+                        seq: i,
                         type: "command"
                     };
+                    i++;
                     session.onMessage(JSON.stringify(req));
-                    req.seq = i++;
+                    req.seq = i;
+                    i++;
                     req.arguments = {};
                     session.onMessage(JSON.stringify(req));
-                    req.seq = i++;
+                    req.seq = i;
+                    i++;
+                    /* tslint:disable no-null-keyword */
                     req.arguments = null;
+                    /* tslint:enable no-null-keyword */
                     session.onMessage(JSON.stringify(req));
-                    req.seq = i++;
+                    req.seq = i;
+                    i++;
                     req.arguments = "";
                     session.onMessage(JSON.stringify(req));
-                    req.seq = i++;
+                    req.seq = i;
+                    i++;
                     req.arguments = 0;
                     session.onMessage(JSON.stringify(req));
-                    req.seq = i++;
+                    req.seq = i;
+                    i++;
                     req.arguments = [];
                     session.onMessage(JSON.stringify(req));
                 }
@@ -448,4 +456,4 @@ namespace ts.server {
             session.consumeQueue();
         });
     });
-}
\ No newline at end of file
+}
diff --git a/tests/cases/unittests/transpile.ts b/tests/cases/unittests/transpile.ts
index 4a821071439..904cc435c44 100644
--- a/tests/cases/unittests/transpile.ts
+++ b/tests/cases/unittests/transpile.ts
@@ -1,90 +1,90 @@
 /// <reference path="..\..\..\src\harness\harness.ts" />
 
-module ts {
+namespace ts {
     describe("Transpile", () => {
-        
+
         interface TranspileTestSettings {
             options?: TranspileOptions;
             expectedOutput?: string;
             expectedDiagnosticCodes?: number[];
         }
-        
+
         function checkDiagnostics(diagnostics: Diagnostic[], expectedDiagnosticCodes?: number[]) {
-            if(!expectedDiagnosticCodes) {
+            if (!expectedDiagnosticCodes) {
                 return;
             }
-            
+
             for (let i = 0; i < expectedDiagnosticCodes.length; i++) {
                 assert.equal(expectedDiagnosticCodes[i], diagnostics[i] && diagnostics[i].code, `Could not find expeced diagnostic.`);
             }
-            assert.equal(diagnostics.length, expectedDiagnosticCodes.length, "Resuting diagnostics count does not match expected");            
+            assert.equal(diagnostics.length, expectedDiagnosticCodes.length, "Resuting diagnostics count does not match expected");
         }
-        
+
         function test(input: string, testSettings: TranspileTestSettings): void {
-            
-            let transpileOptions: TranspileOptions = testSettings.options || {};
+
+            const transpileOptions: TranspileOptions = testSettings.options || {};
             if (!transpileOptions.compilerOptions) {
                 transpileOptions.compilerOptions = {};
             }
-            if(transpileOptions.compilerOptions.newLine === undefined) {
+            if (transpileOptions.compilerOptions.newLine === undefined) { // 
                 // use \r\n as default new line
                 transpileOptions.compilerOptions.newLine = ts.NewLineKind.CarriageReturnLineFeed;
             }
-            
-            let canUseOldTranspile = !transpileOptions.renamedDependencies;  
-            
+
+            const canUseOldTranspile = !transpileOptions.renamedDependencies;
+
             transpileOptions.reportDiagnostics = true;
-            let transpileModuleResult = transpileModule(input, transpileOptions);
-            
+            const transpileModuleResult = transpileModule(input, transpileOptions);
+
             checkDiagnostics(transpileModuleResult.diagnostics, testSettings.expectedDiagnosticCodes);
-            
+
             if (testSettings.expectedOutput !== undefined) {
                 assert.equal(transpileModuleResult.outputText, testSettings.expectedOutput);
             }
-            
+
             if (canUseOldTranspile) {
-                let diagnostics: Diagnostic[] = [];
-                let transpileResult = transpile(input, transpileOptions.compilerOptions, transpileOptions.fileName, diagnostics, transpileOptions.moduleName);                
+                const diagnostics: Diagnostic[] = [];
+                const transpileResult = transpile(input, transpileOptions.compilerOptions, transpileOptions.fileName, diagnostics, transpileOptions.moduleName);
                 checkDiagnostics(diagnostics, testSettings.expectedDiagnosticCodes);
                 if (testSettings.expectedOutput) {
                     assert.equal(transpileResult, testSettings.expectedOutput);
                 }
             }
-            
+
             // check source maps
             if (!transpileOptions.compilerOptions) {
                 transpileOptions.compilerOptions = {};
             }
-            
+
             if (!transpileOptions.fileName) {
                 transpileOptions.fileName = transpileOptions.compilerOptions.jsx ? "file.tsx" : "file.ts";
             }
-            
+
             transpileOptions.compilerOptions.sourceMap = true;
-            let transpileModuleResultWithSourceMap = transpileModule(input, transpileOptions);
+            const transpileModuleResultWithSourceMap = transpileModule(input, transpileOptions);
             assert.isTrue(transpileModuleResultWithSourceMap.sourceMapText !== undefined);
-            
-            let expectedSourceMapFileName = removeFileExtension(getBaseFileName(normalizeSlashes(transpileOptions.fileName))) + ".js.map";
-            let expectedSourceMappingUrlLine = `//# sourceMappingURL=${expectedSourceMapFileName}`;
-                        
+
+            const expectedSourceMapFileName = removeFileExtension(getBaseFileName(normalizeSlashes(transpileOptions.fileName))) + ".js.map";
+            const expectedSourceMappingUrlLine = `//# sourceMappingURL=${expectedSourceMapFileName}`;
+
             if (testSettings.expectedOutput !== undefined) {
                 assert.equal(transpileModuleResultWithSourceMap.outputText, testSettings.expectedOutput + expectedSourceMappingUrlLine);
             }
             else {
                 // expected output is not set, just verify that output text has sourceMappingURL as a last line
-                let output = transpileModuleResultWithSourceMap.outputText;
+                const output = transpileModuleResultWithSourceMap.outputText;
                 assert.isTrue(output.length >= expectedSourceMappingUrlLine.length);
                 if (output.length === expectedSourceMappingUrlLine.length) {
                     assert.equal(output, expectedSourceMappingUrlLine);
                 }
                 else {
-                    let suffix = getNewLineCharacter(transpileOptions.compilerOptions) + expectedSourceMappingUrlLine
+                    const suffix = getNewLineCharacter(transpileOptions.compilerOptions) + expectedSourceMappingUrlLine;
                     assert.isTrue(output.indexOf(suffix, output.length - suffix.length) !== -1);
                 }
-            }       
+            }
 
         }
-        
+
         it("Generates no diagnostics with valid inputs", () => {
             // No errors
             test(`var x = 0;`, { options: { compilerOptions: { module: ModuleKind.CommonJS } } });
@@ -92,7 +92,7 @@ module ts {
 
         it("Generates no diagnostics for missing file references", () => {
             test(`/// <reference path="file2.ts" />
-var x = 0;`, 
+var x = 0;`,
                 { options: { compilerOptions: { module: ModuleKind.CommonJS } } });
         });
 
@@ -112,23 +112,23 @@ var x = 0;`,
         });
 
         it("Generates module output", () => {
-            test(`var x = 0;`, 
-                { 
-                    options: { compilerOptions: { module: ModuleKind.AMD } }, 
+            test(`var x = 0;`,
+                {
+                    options: { compilerOptions: { module: ModuleKind.AMD } },
                     expectedOutput: `define(["require", "exports"], function (require, exports) {\r\n    "use strict";\r\n    var x = 0;\r\n});\r\n`
                 });
         });
 
         it("Uses correct newLine character", () => {
-            test(`var x = 0;`, 
-                { 
-                    options: { compilerOptions: { module: ModuleKind.CommonJS, newLine: NewLineKind.LineFeed } }, 
+            test(`var x = 0;`,
+                {
+                    options: { compilerOptions: { module: ModuleKind.CommonJS, newLine: NewLineKind.LineFeed } },
                     expectedOutput: `"use strict";\nvar x = 0;\n`
                 });
         });
 
         it("Sets module name", () => {
-            let output =
+            const output =
                 `System.register("NamedModule", [], function(exports_1, context_1) {\n` +
                 `    "use strict";\n` +
                 `    var __moduleName = context_1 && context_1.id;\n` +
@@ -140,11 +140,11 @@ var x = 0;`,
                 `        }\n` +
                 `    }\n` +
                 `});\n`;
-            test("var x = 1;", 
-                { 
-                    options: { compilerOptions: { module: ModuleKind.System, newLine: NewLineKind.LineFeed }, moduleName: "NamedModule" }, 
+            test("var x = 1;",
+                {
+                    options: { compilerOptions: { module: ModuleKind.System, newLine: NewLineKind.LineFeed }, moduleName: "NamedModule" },
                     expectedOutput: output
-                })
+                });
         });
 
         it("No extra errors for file without extension", () => {
@@ -152,11 +152,11 @@ var x = 0;`,
         });
 
         it("Rename dependencies - System", () => {
-            let input = 
+            const input =
                 `import {foo} from "SomeName";\n` +
                 `declare function use(a: any);\n` +
-                `use(foo);`
-            let output =
+                `use(foo);`;
+            const output =
                 `System.register(["SomeOtherName"], function(exports_1, context_1) {\n` +
                 `    "use strict";\n` +
                 `    var __moduleName = context_1 && context_1.id;\n` +
@@ -170,39 +170,39 @@ var x = 0;`,
                 `            use(SomeName_1.foo);\n` +
                 `        }\n` +
                 `    }\n` +
-                `});\n`
+                `});\n`;
 
-            test(input, 
-                { 
-                    options: { compilerOptions: { module: ModuleKind.System, newLine: NewLineKind.LineFeed }, renamedDependencies: { "SomeName": "SomeOtherName" } }, 
+            test(input,
+                {
+                    options: { compilerOptions: { module: ModuleKind.System, newLine: NewLineKind.LineFeed }, renamedDependencies: { "SomeName": "SomeOtherName" } },
                     expectedOutput: output
                 });
         });
 
         it("Rename dependencies - AMD", () => {
-            let input = 
+            const input =
                 `import {foo} from "SomeName";\n` +
                 `declare function use(a: any);\n` +
-                `use(foo);`
-            let output =
+                `use(foo);`;
+            const output =
                 `define(["require", "exports", "SomeOtherName"], function (require, exports, SomeName_1) {\n` +
                 `    "use strict";\n` +
                 `    use(SomeName_1.foo);\n` +
                 `});\n`;
 
-            test(input, 
-                { 
-                    options: { compilerOptions: { module: ModuleKind.AMD, newLine: NewLineKind.LineFeed }, renamedDependencies: { "SomeName": "SomeOtherName" } }, 
+            test(input,
+                {
+                    options: { compilerOptions: { module: ModuleKind.AMD, newLine: NewLineKind.LineFeed }, renamedDependencies: { "SomeName": "SomeOtherName" } },
                     expectedOutput: output
                 });
         });
 
         it("Rename dependencies - UMD", () => {
-            let input = 
+            const input =
                 `import {foo} from "SomeName";\n` +
                 `declare function use(a: any);\n` +
-                `use(foo);`
-            let output =
+                `use(foo);`;
+            const output =
                 `(function (factory) {\n` +
                 `    if (typeof module === 'object' && typeof module.exports === 'object') {\n` +
                 `        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n` +
@@ -216,15 +216,15 @@ var x = 0;`,
                 `    use(SomeName_1.foo);\n` +
                 `});\n`;
 
-            test(input, 
-                { 
-                    options: { compilerOptions: { module: ModuleKind.UMD, newLine: NewLineKind.LineFeed }, renamedDependencies: { "SomeName": "SomeOtherName" } }, 
+            test(input,
+                {
+                    options: { compilerOptions: { module: ModuleKind.UMD, newLine: NewLineKind.LineFeed }, renamedDependencies: { "SomeName": "SomeOtherName" } },
                     expectedOutput: output
                 });
         });
-        
+
         it("Transpile with emit decorators and emit metadata", () => {
-            let input = 
+            const input =
                 `import {db} from './db';\n` +
                 `function someDecorator(target) {\n` +
                 `    return target;\n` +
@@ -237,29 +237,29 @@ var x = 0;`,
                 `        this.db.doSomething(); \n` +
                 `    }\n` +
                 `}\n` +
-                `export {MyClass}; \n`
-            let output =
+                `export {MyClass}; \n`;
+            const output =
                 `"use strict";\n` +
-                `var db_1 = require(\'./db\');\n` + 
+                `var db_1 = require(\'./db\');\n` +
                 `function someDecorator(target) {\n` +
                 `    return target;\n` +
-                `}\n` + 
-                `var MyClass = (function () {\n` + 
-                `    function MyClass(db) {\n` + 
-                `        this.db = db;\n` + 
-                `        this.db.doSomething();\n` + 
-                `    }\n` + 
-                `    MyClass = __decorate([\n` + 
-                `        someDecorator, \n` + 
-                `        __metadata(\'design:paramtypes\', [(typeof (_a = typeof db_1.db !== \'undefined\' && db_1.db) === \'function\' && _a) || Object])\n` + 
-                `    ], MyClass);\n` + 
-                `    return MyClass;\n` + 
-                `    var _a;\n` + 
-                `}());\n` + 
+                `}\n` +
+                `var MyClass = (function () {\n` +
+                `    function MyClass(db) {\n` +
+                `        this.db = db;\n` +
+                `        this.db.doSomething();\n` +
+                `    }\n` +
+                `    MyClass = __decorate([\n` +
+                `        someDecorator, \n` +
+                `        __metadata(\'design:paramtypes\', [(typeof (_a = typeof db_1.db !== \'undefined\' && db_1.db) === \'function\' && _a) || Object])\n` +
+                `    ], MyClass);\n` +
+                `    return MyClass;\n` +
+                `    var _a;\n` +
+                `}());\n` +
                 `exports.MyClass = MyClass;\n`;
 
-            test(input, 
-                { 
+            test(input,
+                {
                     options: {
                         compilerOptions: {
                             module: ModuleKind.CommonJS,
@@ -269,7 +269,7 @@ var x = 0;`,
                             experimentalDecorators: true,
                             target: ScriptTarget.ES5,
                         }
-                    }, 
+                    },
                     expectedOutput: output
                 });
         });
@@ -279,12 +279,12 @@ var x = 0;`,
         });
 
         it("transpile file as 'tsx' if 'jsx' is specified", () => {
-            let input = `var x = <div/>`;
-            let output = `"use strict";\nvar x = React.createElement("div", null);\n`;
+            const input = `var x = <div/>`;
+            const output = `"use strict";\nvar x = React.createElement("div", null);\n`;
             test(input, {
                 expectedOutput: output,
                 options: { compilerOptions: { jsx: JsxEmit.React, newLine: NewLineKind.LineFeed } }
-            })
+            });
         });
 
         it("transpile .js files", () => {
@@ -295,7 +295,7 @@ var x = 0;`,
                 options: { compilerOptions: { newLine: NewLineKind.LineFeed, module: ModuleKind.CommonJS }, fileName: "input.js", reportDiagnostics: true },
                 expectedDiagnosticCodes: []
             });
-        })
+        });
 
         it("Supports urls in file name", () => {
             test("var x", { expectedOutput: `"use strict";\r\nvar x;\r\n`, options: { fileName: "http://somewhere/directory//directory2/file.ts" } });
diff --git a/tests/cases/unittests/tsconfigParsing.ts b/tests/cases/unittests/tsconfigParsing.ts
index 776d9495e87..31600a38e51 100644
--- a/tests/cases/unittests/tsconfigParsing.ts
+++ b/tests/cases/unittests/tsconfigParsing.ts
@@ -2,21 +2,21 @@
 /// <reference path="..\..\..\src\compiler\commandLineParser.ts" />
 
 namespace ts {
-    describe('parseConfigFileTextToJson', () => {
+    describe("parseConfigFileTextToJson", () => {
         function assertParseResult(jsonText: string, expectedConfigObject: { config?: any; error?: Diagnostic }) {
-            let parsed = ts.parseConfigFileTextToJson("/apath/tsconfig.json", jsonText);
+            const parsed = ts.parseConfigFileTextToJson("/apath/tsconfig.json", jsonText);
             assert.equal(JSON.stringify(parsed), JSON.stringify(expectedConfigObject));
         }
 
         function assertParseError(jsonText: string) {
-             let parsed = ts.parseConfigFileTextToJson("/apath/tsconfig.json", jsonText);
+             const parsed = ts.parseConfigFileTextToJson("/apath/tsconfig.json", jsonText);
              assert.isTrue(undefined === parsed.config);
              assert.isTrue(undefined !== parsed.error);
         }
 
         function assertParseErrorWithExcludesKeyword(jsonText: string) {
-             let parsed = ts.parseConfigFileTextToJson("/apath/tsconfig.json", jsonText);
-             let parsedCommand = ts.parseJsonConfigFileContent(parsed, ts.sys, "tests/cases/unittests");
+             const parsed = ts.parseConfigFileTextToJson("/apath/tsconfig.json", jsonText);
+             const parsedCommand = ts.parseJsonConfigFileContent(parsed, ts.sys, "tests/cases/unittests");
              assert.isTrue(undefined !== parsedCommand.errors);
         }
 
@@ -156,7 +156,7 @@ namespace ts {
                 "/apath",
                 ["/apath/test.ts", "/apath/.git/a.ts", "/apath/.b.ts", "/apath/..c.ts"],
                 ["/apath/test.ts"]
-            )
+            );
         });
 
         it("allow dotted files and folders when explicitly requested", () => {
@@ -168,7 +168,7 @@ namespace ts {
                 "/apath",
                 ["/apath/test.ts", "/apath/.git/a.ts", "/apath/.b.ts", "/apath/..c.ts"],
                 ["/apath/.git/a.ts", "/apath/.b.ts", "/apath/..c.ts"]
-            )
+            );
         });
 
         it("always exclude outDir", () => {
@@ -190,7 +190,7 @@ namespace ts {
             const expectedFiles = ["/b.ts"];
             assertParseFileList(tsconfigWithoutExclude, "tsconfig.json", rootDir, allFiles, expectedFiles);
             assertParseFileList(tsconfigWithExclude, "tsconfig.json", rootDir, allFiles, expectedFiles);
-        })
+        });
 
         it("implicitly exclude common package folders", () => {
             assertParseFileList(
@@ -199,7 +199,7 @@ namespace ts {
                 "/",
                 ["/node_modules/a.ts", "/bower_components/b.ts", "/jspm_packages/c.ts", "/d.ts", "/folder/e.ts"],
                 ["/d.ts", "/folder/e.ts"]
-            )
-        })
+            );
+        });
     });
 }
diff --git a/tests/cases/unittests/versionCache.ts b/tests/cases/unittests/versionCache.ts
index 131b40278a7..63a2924dbc3 100644
--- a/tests/cases/unittests/versionCache.ts
+++ b/tests/cases/unittests/versionCache.ts
@@ -12,9 +12,9 @@ namespace ts {
     }
 
     function validateEdit(lineIndex: server.LineIndex, sourceText: string, position: number, deleteLength: number, insertString: string): void {
-        let checkText = editFlat(position, deleteLength, insertString, sourceText);
-        let snapshot = lineIndex.edit(position, deleteLength, insertString);
-        let editedText = snapshot.getText(0, snapshot.getLength());
+        const checkText = editFlat(position, deleteLength, insertString, sourceText);
+        const snapshot = lineIndex.edit(position, deleteLength, insertString);
+        const editedText = snapshot.getText(0, snapshot.getLength());
 
         assert.equal(editedText, checkText);
     }
@@ -23,7 +23,7 @@ namespace ts {
         let validateEditAtLineCharIndex: (line: number, char: number, deleteLength: number, insertString: string) => void;
 
         before(() => {
-            let testContent = `/// <reference path="z.ts" />
+            const testContent = `/// <reference path="z.ts" />
 var x = 10;
 var y = { zebra: 12, giraffe: "ell" };
 z.a;
@@ -34,14 +34,14 @@ k=y;
 var p:Point=new Point();
 var q:Point=<Point>p;`;
 
-            let { lines } = server.LineIndex.linesFromText(testContent);
+            const { lines } = server.LineIndex.linesFromText(testContent);
             assert.isTrue(lines.length > 0, "Failed to initialize test text. Expected text to have at least one line");
 
-            let lineIndex = new server.LineIndex();
+            const lineIndex = new server.LineIndex();
             lineIndex.load(lines);
 
             validateEditAtLineCharIndex = (line: number, char: number, deleteLength: number, insertString: string) => {
-                let position = lineColToPosition(lineIndex, line, char);
+                const position = lineColToPosition(lineIndex, line, char);
                 validateEdit(lineIndex, testContent, position, deleteLength, insertString);
             };
         });
@@ -91,7 +91,7 @@ and grew 1cm per day`;
             ({ lines, lineMap } = server.LineIndex.linesFromText(testContent));
             assert.isTrue(lines.length > 0, "Failed to initialize test text. Expected text to have at least one line");
 
-            let lineIndex = new server.LineIndex();
+            const lineIndex = new server.LineIndex();
             lineIndex.load(lines);
 
             validateEditAtPosition = (position: number, deleteLength: number, insertString: string) => {
@@ -195,9 +195,9 @@ and grew 1cm per day`;
 
         before(() => {
             // Use scanner.ts, decent size, does not change frequently
-            let testFileName = "src/compiler/scanner.ts";
+            const testFileName = "src/compiler/scanner.ts";
             testContent = Harness.IO.readFile(testFileName);
-            let totalChars = testContent.length;
+            const totalChars = testContent.length;
             assert.isTrue(totalChars > 0, "Failed to read test file.");
 
             ({ lines, lineMap } = server.LineIndex.linesFromText(testContent));
@@ -246,41 +246,41 @@ and grew 1cm per day`;
 
         it("Range (average length 1/4 file size)", () => {
             for (let i = 0; i < iterationCount; i++) {
-                let s2 = lineIndex.getText(rsa[i], la[i]);
-                let s1 = testContent.substring(rsa[i], rsa[i] + la[i]);
+                const s2 = lineIndex.getText(rsa[i], la[i]);
+                const s1 = testContent.substring(rsa[i], rsa[i] + la[i]);
                 assert.equal(s1, s2);
             }
         });
 
         it("Range (average length 4 chars)", () => {
             for (let j = 0; j < iterationCount; j++) {
-                let s2 = lineIndex.getText(rsa[j], las[j]);
-                let s1 = testContent.substring(rsa[j], rsa[j] + las[j]);
+                const s2 = lineIndex.getText(rsa[j], las[j]);
+                const s1 = testContent.substring(rsa[j], rsa[j] + las[j]);
                 assert.equal(s1, s2);
             }
         });
 
         it("Edit (average length 4)", () => {
             for (let i = 0; i < iterationCount; i++) {
-                let insertString = testContent.substring(rsa[100000 - i], rsa[100000 - i] + las[100000 - i]);
-                let snapshot = lineIndex.edit(rsa[i], las[i], insertString);
-                let checkText = editFlat(rsa[i], las[i], insertString, testContent);
-                let snapText = snapshot.getText(0, checkText.length);
+                const insertString = testContent.substring(rsa[100000 - i], rsa[100000 - i] + las[100000 - i]);
+                const snapshot = lineIndex.edit(rsa[i], las[i], insertString);
+                const checkText = editFlat(rsa[i], las[i], insertString, testContent);
+                const snapText = snapshot.getText(0, checkText.length);
                 assert.equal(checkText, snapText);
             }
         });
 
         it("Edit ScriptVersionCache ", () => {
-            let svc = server.ScriptVersionCache.fromString(<server.ServerHost>ts.sys, testContent);
+            const svc = server.ScriptVersionCache.fromString(<server.ServerHost>ts.sys, testContent);
             let checkText = testContent;
 
             for (let i = 0; i < iterationCount; i++) {
-                let insertString = testContent.substring(rsa[i], rsa[i] + las[i]);
+                const insertString = testContent.substring(rsa[i], rsa[i] + las[i]);
                 svc.edit(ersa[i], elas[i], insertString);
                 checkText = editFlat(ersa[i], elas[i], insertString, checkText);
                 if (0 == (i % 4)) {
-                    let snap = svc.getSnapshot();
-                    let snapText = snap.getText(0, checkText.length);
+                    const snap = svc.getSnapshot();
+                    const snapText = snap.getText(0, checkText.length);
                     assert.equal(checkText, snapText);
                 }
             }
@@ -288,18 +288,18 @@ and grew 1cm per day`;
 
         it("Edit (average length 1/4th file size)", () => {
             for (let i = 0; i < iterationCount; i++) {
-                let insertString = testContent.substring(rsa[100000 - i], rsa[100000 - i] + la[100000 - i]);
-                let snapshot = lineIndex.edit(rsa[i], la[i], insertString);
-                let checkText = editFlat(rsa[i], la[i], insertString, testContent);
-                let snapText = snapshot.getText(0, checkText.length);
+                const insertString = testContent.substring(rsa[100000 - i], rsa[100000 - i] + la[100000 - i]);
+                const snapshot = lineIndex.edit(rsa[i], la[i], insertString);
+                const checkText = editFlat(rsa[i], la[i], insertString, testContent);
+                const snapText = snapshot.getText(0, checkText.length);
                 assert.equal(checkText, snapText);
             }
         });
 
         it("Line/offset from pos", () => {
             for (let i = 0; i < iterationCount; i++) {
-                let lp = lineIndex.charOffsetToLineNumberAndPos(rsa[i]);
-                let lac = ts.computeLineAndCharacterOfPosition(lineMap, rsa[i]);
+                const lp = lineIndex.charOffsetToLineNumberAndPos(rsa[i]);
+                const lac = ts.computeLineAndCharacterOfPosition(lineMap, rsa[i]);
                 assert.equal(lac.line + 1, lp.line, "Line number mismatch " + (lac.line + 1) + " " + lp.line + " " + i);
                 assert.equal(lac.character, (lp.offset), "Charachter offset mismatch " + lac.character + " " + lp.offset + " " + i);
             }
@@ -308,12 +308,12 @@ and grew 1cm per day`;
         it("Start pos from line", () => {
             for (let i = 0; i < iterationCount; i++) {
                 for (let j = 0, llen = lines.length; j < llen; j++) {
-                    let lineInfo = lineIndex.lineNumberToInfo(j + 1);
-                    let lineIndexOffset = lineInfo.offset;
-                    let lineMapOffset = lineMap[j];
+                    const lineInfo = lineIndex.lineNumberToInfo(j + 1);
+                    const lineIndexOffset = lineInfo.offset;
+                    const lineMapOffset = lineMap[j];
                     assert.equal(lineIndexOffset, lineMapOffset);
                 }
             }
         });
     });
-}
\ No newline at end of file
+}

From 7bbce05d615af9afea469557e5c51e439733dbf0 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 24 May 2016 10:41:53 -0700
Subject: [PATCH 068/332] Remove duplicate linting of client.ts

---
 Jakefile.js | 1 -
 1 file changed, 1 deletion(-)

diff --git a/Jakefile.js b/Jakefile.js
index 0ec85b68fbe..6c7724116ad 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -978,7 +978,6 @@ var lintTargets = compilerSources
     // Other harness sources
     .concat(["instrumenter.ts"].map(function(f) { return path.join(harnessDirectory, f) }))
     .concat(serverCoreSources)
-    .concat(["client.ts"].map(function(f) { return path.join(serverDirectory, f); }))
     .concat(tslintRulesFiles)
     .concat(servicesLintTargets);
 

From 9865b48d0f4a492aee59ea64edd3daf0555bb08e Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 24 May 2016 11:22:25 -0700
Subject: [PATCH 069/332] Remove intentionally unused variables

---
 tests/cases/unittests/moduleResolution.ts        |  4 +---
 tests/cases/unittests/reuseProgramStructure.ts   | 16 +++++++---------
 .../cases/unittests/services/documentRegistry.ts | 12 +++++-------
 3 files changed, 13 insertions(+), 19 deletions(-)

diff --git a/tests/cases/unittests/moduleResolution.ts b/tests/cases/unittests/moduleResolution.ts
index bf7d9cea922..ab5eddc0997 100644
--- a/tests/cases/unittests/moduleResolution.ts
+++ b/tests/cases/unittests/moduleResolution.ts
@@ -1059,9 +1059,7 @@ import b = require("./moduleB.ts");
             const diagnostics1 = program1.getFileProcessingDiagnostics().getDiagnostics();
             assert.equal(diagnostics1.length, 1, "expected one diagnostic");
 
-            /* tslint:disable no-unused-variable */
-            const program2 = createProgram(names, {}, compilerHost, program1);
-            /* tslint:enable no-unused-variable */
+            createProgram(names, {}, compilerHost, program1);
             assert.isTrue(program1.structureIsReused);
             const diagnostics2 = program1.getFileProcessingDiagnostics().getDiagnostics();
             assert.equal(diagnostics2.length, 1, "expected one diagnostic");
diff --git a/tests/cases/unittests/reuseProgramStructure.ts b/tests/cases/unittests/reuseProgramStructure.ts
index b3d51ebb75c..6ab90595f9f 100644
--- a/tests/cases/unittests/reuseProgramStructure.ts
+++ b/tests/cases/unittests/reuseProgramStructure.ts
@@ -210,7 +210,6 @@ namespace ts {
     }
 
     describe("Reuse program structure", () => {
-        /* tslint:disable no-unused-variable */
         const target = ScriptTarget.Latest;
         const files = [
             { name: "a.ts", text: SourceText.New(
@@ -248,7 +247,7 @@ namespace ts {
 
         it("fails if change affects tripleslash references", () => {
             const program_1 = newProgram(files, ["a.ts"], { target });
-            const program_2 = updateProgram(program_1, ["a.ts"], { target }, files => {
+            updateProgram(program_1, ["a.ts"], { target }, files => {
                 const newReferences = `/// <reference path='b.ts'/>
                 /// <reference path='c.ts'/>
                 `;
@@ -259,7 +258,7 @@ namespace ts {
 
         it("fails if change affects imports", () => {
             const program_1 = newProgram(files, ["a.ts"], { target });
-            const program_2 = updateProgram(program_1, ["a.ts"], { target }, files => {
+            updateProgram(program_1, ["a.ts"], { target }, files => {
                 files[2].text = files[2].text.updateImportsAndExports("import x from 'b'");
             });
             assert.isTrue(!program_1.structureIsReused);
@@ -267,7 +266,7 @@ namespace ts {
 
         it("fails if change affects type directives", () => {
             const program_1 = newProgram(files, ["a.ts"], { target });
-            const program_2 = updateProgram(program_1, ["a.ts"], { target }, files => {
+            updateProgram(program_1, ["a.ts"], { target }, files => {
                 const newReferences = `
 /// <reference path='b.ts'/>
 /// <reference path='non-existing-file.ts'/>
@@ -279,19 +278,19 @@ namespace ts {
 
         it("fails if module kind changes", () => {
             const program_1 = newProgram(files, ["a.ts"], { target, module: ModuleKind.CommonJS });
-            const program_2 = updateProgram(program_1, ["a.ts"], { target, module: ModuleKind.AMD }, files => void 0);
+            updateProgram(program_1, ["a.ts"], { target, module: ModuleKind.AMD }, files => void 0);
             assert.isTrue(!program_1.structureIsReused);
         });
 
         it("fails if rootdir changes", () => {
             const program_1 = newProgram(files, ["a.ts"], { target, module: ModuleKind.CommonJS, rootDir: "/a/b" });
-            const program_2 = updateProgram(program_1, ["a.ts"], { target, module: ModuleKind.CommonJS, rootDir: "/a/c" }, files => void 0);
+            updateProgram(program_1, ["a.ts"], { target, module: ModuleKind.CommonJS, rootDir: "/a/c" }, files => void 0);
             assert.isTrue(!program_1.structureIsReused);
         });
 
         it("fails if config path changes", () => {
             const program_1 = newProgram(files, ["a.ts"], { target, module: ModuleKind.CommonJS, configFilePath: "/a/b/tsconfig.json" });
-            const program_2 = updateProgram(program_1, ["a.ts"], { target, module: ModuleKind.CommonJS, configFilePath: "/a/c/tsconfig.json" }, files => void 0);
+            updateProgram(program_1, ["a.ts"], { target, module: ModuleKind.CommonJS, configFilePath: "/a/c/tsconfig.json" }, files => void 0);
             assert.isTrue(!program_1.structureIsReused);
         });
 
@@ -360,7 +359,7 @@ namespace ts {
             assert.isTrue(!program_2.structureIsReused);
             checkResolvedTypeDirectivesCache(program_3, "/a.ts", undefined);
 
-            const program_4 = updateProgram(program_3, ["/a.ts"], options, files => {
+            updateProgram(program_3, ["/a.ts"], options, files => {
                 const newReferences = `/// <reference types="typedefs"/>
                 /// <reference types="typedefs2"/>
                 `;
@@ -369,7 +368,6 @@ namespace ts {
             assert.isTrue(!program_3.structureIsReused);
             checkResolvedTypeDirectivesCache(program_1, "/a.ts", { "typedefs": { resolvedFileName: "/types/typedefs/index.d.ts", primary: true } });
         });
-        /* tslint:enable no-unused-variable */
     });
 
     describe("host is optional", () => {
diff --git a/tests/cases/unittests/services/documentRegistry.ts b/tests/cases/unittests/services/documentRegistry.ts
index 854fbde837e..942408c535f 100644
--- a/tests/cases/unittests/services/documentRegistry.ts
+++ b/tests/cases/unittests/services/documentRegistry.ts
@@ -1,7 +1,6 @@
 ///<reference path='..\..\..\..\src\harness\harness.ts' />
 
 describe("DocumentRegistry", () => {
-    /* tslint:disable no-unused-variable */
     it("documents are shared between projects", () => {
         const documentRegistry = ts.createDocumentRegistry();
         const defaultCompilerOptions = ts.getDefaultCompilerOptions();
@@ -47,7 +46,7 @@ describe("DocumentRegistry", () => {
         const defaultCompilerOptions = ts.getDefaultCompilerOptions();
 
         // Simulate one LS getting the document.
-        const f1 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
+        documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "1");
 
         // Simulate another LS getting the document at another version.
         const f2 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, ts.ScriptSnapshot.fromString("var x = 1;"), /* version */ "2");
@@ -66,16 +65,15 @@ describe("DocumentRegistry", () => {
         snapshot.getChangeRange = old => ts.createTextChangeRange(ts.createTextSpan(0, contents.length), contents.length);
 
         // Simulate one LS getting the document.
-        const f1 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "1");
+        documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "1");
 
         // Simulate another LS getting that document.
-        const f2 = documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "1");
+        documentRegistry.acquireDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "1");
 
         // Now LS1 updates their document.
-        const f3 = documentRegistry.updateDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "2");
+        documentRegistry.updateDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "2");
 
         // Now LS2 tries to update their document.
-        const f4 = documentRegistry.updateDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "3");
+        documentRegistry.updateDocument("file1.ts", defaultCompilerOptions, snapshot, /* version */ "3");
     });
-    /* tslint:enable no-unused-variable */
 });

From 4b133489a1c118296e5b3fe356bef4ef926c3356 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Tue, 24 May 2016 11:10:57 -0700
Subject: [PATCH 070/332] Add getDirectories to shims

---
 lib/lib.scriptHost.d.ts               | 294 --------------------------
 src/harness/harnessLanguageService.ts |   2 +
 src/services/shims.ts                 |   5 +
 3 files changed, 7 insertions(+), 294 deletions(-)
 delete mode 100644 lib/lib.scriptHost.d.ts

diff --git a/lib/lib.scriptHost.d.ts b/lib/lib.scriptHost.d.ts
deleted file mode 100644
index d4c6131fd93..00000000000
--- a/lib/lib.scriptHost.d.ts
+++ /dev/null
@@ -1,294 +0,0 @@
-/*! *****************************************************************************
-Copyright (c) Microsoft Corporation. All rights reserved. 
-Licensed under the Apache License, Version 2.0 (the "License"); you may not use
-this file except in compliance with the License. You may obtain a copy of the
-License at http://www.apache.org/licenses/LICENSE-2.0  
- 
-THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
-KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
-WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
-MERCHANTABLITY OR NON-INFRINGEMENT. 
- 
-See the Apache Version 2.0 License for specific language governing permissions
-and limitations under the License.
-***************************************************************************** */
-
-/// <reference no-default-lib="true"/>
-
-
-/////////////////////////////
-/// Windows Script Host APIS
-/////////////////////////////
-
-
-interface ActiveXObject {
-    new (s: string): any;
-}
-declare var ActiveXObject: ActiveXObject;
-
-interface ITextWriter {
-    Write(s: string): void;
-    WriteLine(s: string): void;
-    Close(): void;
-}
-
-interface TextStreamBase {
-    /**
-     * The column number of the current character position in an input stream.
-     */
-    Column: number;
-
-    /**
-     * The current line number in an input stream.
-     */
-    Line: number;
-
-    /**
-     * Closes a text stream.
-     * It is not necessary to close standard streams; they close automatically when the process ends. If 
-     * you close a standard stream, be aware that any other pointers to that standard stream become invalid.
-     */
-    Close(): void;
-}
-
-interface TextStreamWriter extends TextStreamBase {
-    /**
-     * Sends a string to an output stream.
-     */
-    Write(s: string): void;
-
-    /**
-     * Sends a specified number of blank lines (newline characters) to an output stream.
-     */
-    WriteBlankLines(intLines: number): void;
-
-    /**
-     * Sends a string followed by a newline character to an output stream.
-     */
-    WriteLine(s: string): void;
-}
-
-interface TextStreamReader extends TextStreamBase {
-    /**
-     * Returns a specified number of characters from an input stream, starting at the current pointer position.
-     * Does not return until the ENTER key is pressed.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     */
-    Read(characters: number): string;
-
-    /**
-     * Returns all characters from an input stream.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     */
-    ReadAll(): string;
-
-    /**
-     * Returns an entire line from an input stream.
-     * Although this method extracts the newline character, it does not add it to the returned string.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     */
-    ReadLine(): string;
-
-    /**
-     * Skips a specified number of characters when reading from an input text stream.
-     * Can only be used on a stream in reading mode; causes an error in writing or appending mode.
-     * @param characters Positive number of characters to skip forward. (Backward skipping is not supported.)
-     */
-    Skip(characters: number): void;
-
-    /**
-     * Skips the next line when reading from an input text stream.
-     * Can only be used on a stream in reading mode, not writing or appending mode.
-     */
-    SkipLine(): void;
-
-    /**
-     * Indicates whether the stream pointer position is at the end of a line.
-     */
-    AtEndOfLine: boolean;
-
-    /**
-     * Indicates whether the stream pointer position is at the end of a stream.
-     */
-    AtEndOfStream: boolean;
-}
-
-declare var WScript: {
-    /**
-    * Outputs text to either a message box (under WScript.exe) or the command console window followed by
-    * a newline (under CScript.exe).
-    */
-    Echo(s: any): void;
-
-    /**
-     * Exposes the write-only error output stream for the current script.
-     * Can be accessed only while using CScript.exe.
-     */
-    StdErr: TextStreamWriter;
-
-    /**
-     * Exposes the write-only output stream for the current script.
-     * Can be accessed only while using CScript.exe.
-     */
-    StdOut: TextStreamWriter;
-    Arguments: { length: number; Item(n: number): string; };
-
-    /**
-     *  The full path of the currently running script.
-     */
-    ScriptFullName: string;
-
-    /**
-     * Forces the script to stop immediately, with an optional exit code.
-     */
-    Quit(exitCode?: number): number;
-
-    /**
-     * The Windows Script Host build version number.
-     */
-    BuildVersion: number;
-
-    /**
-     * Fully qualified path of the host executable.
-     */
-    FullName: string;
-
-    /**
-     * Gets/sets the script mode - interactive(true) or batch(false).
-     */
-    Interactive: boolean;
-
-    /**
-     * The name of the host executable (WScript.exe or CScript.exe).
-     */
-    Name: string;
-
-    /**
-     * Path of the directory containing the host executable.
-     */
-    Path: string;
-
-    /**
-     * The filename of the currently running script.
-     */
-    ScriptName: string;
-
-    /**
-     * Exposes the read-only input stream for the current script.
-     * Can be accessed only while using CScript.exe.
-     */
-    StdIn: TextStreamReader;
-
-    /**
-     * Windows Script Host version
-     */
-    Version: string;
-
-    /**
-     * Connects a COM object's event sources to functions named with a given prefix, in the form prefix_event.
-     */
-    ConnectObject(objEventSource: any, strPrefix: string): void;
-
-    /**
-     * Creates a COM object.
-     * @param strProgiID
-     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
-     */
-    CreateObject(strProgID: string, strPrefix?: string): any;
-
-    /**
-     * Disconnects a COM object from its event sources.
-     */
-    DisconnectObject(obj: any): void;
-
-    /**
-     * Retrieves an existing object with the specified ProgID from memory, or creates a new one from a file.
-     * @param strPathname Fully qualified path to the file containing the object persisted to disk.
-     *                       For objects in memory, pass a zero-length string.
-     * @param strProgID
-     * @param strPrefix Function names in the form prefix_event will be bound to this object's COM events.
-     */
-    GetObject(strPathname: string, strProgID?: string, strPrefix?: string): any;
-
-    /**
-     * Suspends script execution for a specified length of time, then continues execution.
-     * @param intTime Interval (in milliseconds) to suspend script execution.
-     */
-    Sleep(intTime: number): void;
-};
-
-/**
- * Allows enumerating over a COM collection, which may not have indexed item access.
- */
-interface Enumerator<T> {
-    /**
-     * Returns true if the current item is the last one in the collection, or the collection is empty,
-     * or the current item is undefined.
-     */
-    atEnd(): boolean;
-
-    /**
-     * Returns the current item in the collection
-     */
-    item(): T;
-
-    /**
-     * Resets the current item in the collection to the first item. If there are no items in the collection,
-     * the current item is set to undefined.
-     */
-    moveFirst(): void;
-
-    /**
-     * Moves the current item to the next item in the collection. If the enumerator is at the end of
-     * the collection or the collection is empty, the current item is set to undefined.
-     */
-    moveNext(): void;
-}
-
-interface EnumeratorConstructor {
-    new <T>(collection: any): Enumerator<T>;
-    new (collection: any): Enumerator<any>;
-}
-
-declare var Enumerator: EnumeratorConstructor;
-
-/**
- * Enables reading from a COM safe array, which might have an alternate lower bound, or multiple dimensions.
- */
-interface VBArray<T> {
-    /**
-     * Returns the number of dimensions (1-based).
-     */
-    dimensions(): number;
-
-    /**
-     * Takes an index for each dimension in the array, and returns the item at the corresponding location.
-     */
-    getItem(dimension1Index: number, ...dimensionNIndexes: number[]): T;
-
-    /**
-     * Returns the smallest available index for a given dimension.
-     * @param dimension 1-based dimension (defaults to 1)
-     */
-    lbound(dimension?: number): number;
-
-    /**
-     * Returns the largest available index for a given dimension.
-     * @param dimension 1-based dimension (defaults to 1)
-     */
-    ubound(dimension?: number): number;
-
-    /**
-     * Returns a Javascript array with all the elements in the VBArray. If there are multiple dimensions,
-     * each successive dimension is appended to the end of the array.
-     * Example: [[1,2,3],[4,5,6]] becomes [1,2,3,4,5,6]
-     */
-    toArray(): T[];
-}
-
-interface VBArrayConstructor {
-    new <T>(safeArray: any): VBArray<T>;
-    new (safeArray: any): VBArray<any>;
-}
-
-declare var VBArray: VBArrayConstructor;
diff --git a/src/harness/harnessLanguageService.ts b/src/harness/harnessLanguageService.ts
index 3df0e8e7d8f..d40c00371bf 100644
--- a/src/harness/harnessLanguageService.ts
+++ b/src/harness/harnessLanguageService.ts
@@ -182,6 +182,7 @@ namespace Harness.LanguageService {
     class NativeLanguageServiceHost extends LanguageServiceAdapterHost implements ts.LanguageServiceHost {
         getCompilationSettings() { return this.settings; }
         getCancellationToken() { return this.cancellationToken; }
+        getDirectories(path: string): string[] { return []; }
         getCurrentDirectory(): string { return ""; }
         getDefaultLibFileName(): string { return Harness.Compiler.defaultLibFileName; }
         getScriptFileNames(): string[] { return this.getFilenames(); }
@@ -268,6 +269,7 @@ namespace Harness.LanguageService {
         getCompilationSettings(): string { return JSON.stringify(this.nativeHost.getCompilationSettings()); }
         getCancellationToken(): ts.HostCancellationToken { return this.nativeHost.getCancellationToken(); }
         getCurrentDirectory(): string { return this.nativeHost.getCurrentDirectory(); }
+        getDirectories(path: string) { return this.nativeHost.getDirectories(path); }
         getDefaultLibFileName(): string { return this.nativeHost.getDefaultLibFileName(); }
         getScriptFileNames(): string { return JSON.stringify(this.nativeHost.getScriptFileNames()); }
         getScriptSnapshot(fileName: string): ts.ScriptSnapshotShim {
diff --git a/src/services/shims.ts b/src/services/shims.ts
index a515f32d169..eb9c28ff7ac 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -61,6 +61,7 @@ namespace ts {
         getLocalizedDiagnosticMessages(): string;
         getCancellationToken(): HostCancellationToken;
         getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
         getDefaultLibFileName(options: string): string;
         getNewLine?(): string;
         getProjectVersion?(): string;
@@ -400,6 +401,10 @@ namespace ts {
             return this.shimHost.getCurrentDirectory();
         }
 
+        public getDirectories(path: string): string[] {
+            return this.shimHost.getDirectories(path);
+        }
+
         public getDefaultLibFileName(options: CompilerOptions): string {
             return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
         }

From 47eac4f4af32c8b0d2ba74e836df0505915d3b81 Mon Sep 17 00:00:00 2001
From: Evan Sebastian <evanlhoini@gmail.com>
Date: Wed, 25 May 2016 01:42:17 +0700
Subject: [PATCH 071/332] isNameOfExportedDeclarationInNonES6Module

---
 src/compiler/emitter.ts | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index e6638102c40..f7eda2d0e7e 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -2613,7 +2613,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                 return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, /*isExported*/ true);
             }
 
-            function isNameOfExportedSourceLevelDeclarationInClauseModule(node: Node): boolean {
+            function isNameOfExportedDeclarationInNonES6Module(node: Node): boolean {
                 if (modulekind === ModuleKind.System || node.kind !== SyntaxKind.Identifier || nodeIsSynthesized(node)) {
                     return false;
                 }
@@ -2637,7 +2637,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                     write(`", `);
                 }
                 const internalExportChanged = isPlusPlusOrMinusMinus &&
-                    isNameOfExportedSourceLevelDeclarationInClauseModule(node.operand);
+                    isNameOfExportedDeclarationInNonES6Module(node.operand);
 
                 if (internalExportChanged) {
                     emitAliasEqual(<Identifier> node.operand);
@@ -2674,7 +2674,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
 
             function emitPostfixUnaryExpression(node: PostfixUnaryExpression) {
                 const externalExportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
-                const internalExportChanged = isNameOfExportedSourceLevelDeclarationInClauseModule(node.operand);
+                const internalExportChanged = isNameOfExportedDeclarationInNonES6Module(node.operand);
 
                 if (externalExportChanged) {
                     // export function returns the value that was passes as the second argument
@@ -2841,7 +2841,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                     }
 
                     const internalExportChanged = isAssignment &&
-                        isNameOfExportedSourceLevelDeclarationInClauseModule(node.left);
+                        isNameOfExportedDeclarationInNonES6Module(node.left);
 
                     if (internalExportChanged) {
                         // export { foo }
@@ -5464,7 +5464,7 @@ const _super = (function (geti, seti) {
                         //
 
                         // NOTE: we reuse the same rewriting logic for cases when targeting ES6 and module kind is System.
-                        // Because of hoisting top level class declaration need to be emitted as class expressions. 
+                        // Because of hoisting top level class declaration need to be emitted as class expressions.
                         // Double bind case is only required if node is decorated.
                         if (isDecorated && resolver.getNodeCheckFlags(node) & NodeCheckFlags.ClassWithBodyScopedClassBinding) {
                             decoratedClassAlias = unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default"));

From b8b38f3b86882d2f7ba94ce53be09cedd821a238 Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Tue, 24 May 2016 12:11:15 -0700
Subject: [PATCH 072/332] Do not resolve alias when getting symbol of import
 equal's right hand side Fixes #5501

---
 src/compiler/checker.ts                       | 22 ++++++++-----------
 .../reference/acceptableAlias1.symbols        |  2 +-
 .../amdImportNotAsPrimaryExpression.symbols   |  2 +-
 .../reference/chainedImportAlias.symbols      |  2 +-
 ...mmonJSImportNotAsPrimaryExpression.symbols |  2 +-
 .../declFileForExportedImport.symbols         |  2 +-
 ...lFileImportChainInExportAssignment.symbols |  2 +-
 .../declarationEmit_nameConflicts.symbols     |  2 +-
 .../dependencyViaImportAlias.symbols          |  2 +-
 ...edImportInIndirectExportAssignment.symbols |  2 +-
 ...alModuleReferenceDoubleUnderscore1.symbols |  2 +-
 ...ternalModuleInsideAnInternalModule.symbols |  2 +-
 .../import_reference-exported-alias.symbols   |  4 ++--
 .../import_reference-to-type-alias.symbols    |  2 +-
 .../importedAliasesInTypePositions.symbols    |  2 +-
 .../reference/tsxPreserveEmit1.symbols        |  2 +-
 tests/cases/fourslash/renameAlias.ts          | 11 ++++++++++
 tests/cases/fourslash/renameAlias2.ts         | 11 ++++++++++
 tests/cases/fourslash/renameAlias3.ts         | 11 ++++++++++
 .../fourslash/renameAliasExternalModule.ts    | 16 ++++++++++++++
 .../fourslash/renameAliasExternalModule2.ts   | 16 ++++++++++++++
 .../fourslash/renameAliasExternalModule3.ts   | 16 ++++++++++++++
 22 files changed, 106 insertions(+), 29 deletions(-)
 create mode 100644 tests/cases/fourslash/renameAlias.ts
 create mode 100644 tests/cases/fourslash/renameAlias2.ts
 create mode 100644 tests/cases/fourslash/renameAlias3.ts
 create mode 100644 tests/cases/fourslash/renameAliasExternalModule.ts
 create mode 100644 tests/cases/fourslash/renameAliasExternalModule2.ts
 create mode 100644 tests/cases/fourslash/renameAliasExternalModule3.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 6a42dc43d51..8a510825673 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -1154,11 +1154,7 @@ namespace ts {
         }
 
         // This function is only for imports with entity names
-        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName: EntityName, importDeclaration?: ImportEqualsDeclaration): Symbol {
-            if (!importDeclaration) {
-                importDeclaration = <ImportEqualsDeclaration>getAncestor(entityName, SyntaxKind.ImportEqualsDeclaration);
-                Debug.assert(importDeclaration !== undefined);
-            }
+        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName: EntityName, importDeclaration: ImportEqualsDeclaration, dontResolveAlias?: boolean): Symbol {
             // There are three things we might try to look for. In the following examples,
             // the search term is enclosed in |...|:
             //
@@ -1170,13 +1166,13 @@ namespace ts {
             }
             // Check for case 1 and 3 in the above example
             if (entityName.kind === SyntaxKind.Identifier || entityName.parent.kind === SyntaxKind.QualifiedName) {
-                return resolveEntityName(entityName, SymbolFlags.Namespace);
+                return resolveEntityName(entityName, SymbolFlags.Namespace, /*ignoreErrors*/ false, dontResolveAlias);
             }
             else {
                 // Case 2 in above example
                 // entityName.kind could be a QualifiedName or a Missing identifier
                 Debug.assert(entityName.parent.kind === SyntaxKind.ImportEqualsDeclaration);
-                return resolveEntityName(entityName, SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace);
+                return resolveEntityName(entityName, SymbolFlags.Value | SymbolFlags.Type | SymbolFlags.Namespace, /*ignoreErrors*/ false, dontResolveAlias);
             }
         }
 
@@ -1185,7 +1181,7 @@ namespace ts {
         }
 
         // Resolves a qualified name and any involved aliases
-        function resolveEntityName(name: EntityName | Expression, meaning: SymbolFlags, ignoreErrors?: boolean): Symbol {
+        function resolveEntityName(name: EntityName | Expression, meaning: SymbolFlags, ignoreErrors?: boolean, dontResolveAlias?: boolean): Symbol {
             if (nodeIsMissing(name)) {
                 return undefined;
             }
@@ -1219,7 +1215,7 @@ namespace ts {
                 Debug.fail("Unknown entity name kind.");
             }
             Debug.assert((symbol.flags & SymbolFlags.Instantiated) === 0, "Should never get an instantiated symbol here.");
-            return symbol.flags & meaning ? symbol : resolveAlias(symbol);
+            return (symbol.flags & meaning) || dontResolveAlias ? symbol : resolveAlias(symbol);
         }
 
         function resolveExternalModuleName(location: Node, moduleReferenceExpression: Expression): Symbol {
@@ -16441,7 +16437,9 @@ namespace ts {
             if (entityName.kind !== SyntaxKind.PropertyAccessExpression) {
                 if (isInRightSideOfImportOrExportAssignment(<EntityName>entityName)) {
                     // Since we already checked for ExportAssignment, this really could only be an Import
-                    return getSymbolOfPartOfRightHandSideOfImportEquals(<EntityName>entityName);
+                    const importEqualsDeclaration = <ImportEqualsDeclaration>getAncestor(entityName, SyntaxKind.ImportEqualsDeclaration);
+                    Debug.assert(importEqualsDeclaration !== undefined);
+                    return getSymbolOfPartOfRightHandSideOfImportEquals(<EntityName>entityName, importEqualsDeclaration, /*dontResolveAlias*/ true);
                 }
             }
 
@@ -16531,9 +16529,7 @@ namespace ts {
 
             if (node.kind === SyntaxKind.Identifier) {
                 if (isInRightSideOfImportOrExportAssignment(<Identifier>node)) {
-                    return node.parent.kind === SyntaxKind.ExportAssignment
-                        ? getSymbolOfEntityNameOrPropertyAccessExpression(<Identifier>node)
-                        : getSymbolOfPartOfRightHandSideOfImportEquals(<Identifier>node);
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(<Identifier>node);
                 }
                 else if (node.parent.kind === SyntaxKind.BindingElement &&
                     node.parent.parent.kind === SyntaxKind.ObjectBindingPattern &&
diff --git a/tests/baselines/reference/acceptableAlias1.symbols b/tests/baselines/reference/acceptableAlias1.symbols
index cffbc70290f..31679fb6a52 100644
--- a/tests/baselines/reference/acceptableAlias1.symbols
+++ b/tests/baselines/reference/acceptableAlias1.symbols
@@ -13,5 +13,5 @@ module M {
 import r = M.X;
 >r : Symbol(r, Decl(acceptableAlias1.ts, 4, 1))
 >M : Symbol(M, Decl(acceptableAlias1.ts, 0, 0))
->X : Symbol(r, Decl(acceptableAlias1.ts, 0, 10))
+>X : Symbol(M.X, Decl(acceptableAlias1.ts, 2, 5))
 
diff --git a/tests/baselines/reference/amdImportNotAsPrimaryExpression.symbols b/tests/baselines/reference/amdImportNotAsPrimaryExpression.symbols
index ae67c0a3175..a04bd7077c1 100644
--- a/tests/baselines/reference/amdImportNotAsPrimaryExpression.symbols
+++ b/tests/baselines/reference/amdImportNotAsPrimaryExpression.symbols
@@ -5,7 +5,7 @@ import foo = require("./foo_0");
 // None of the below should cause a runtime dependency on foo_0
 import f = foo.M1;
 >f : Symbol(f, Decl(foo_1.ts, 0, 32))
->foo : Symbol(foo, Decl(foo_0.ts, 0, 0))
+>foo : Symbol(foo, Decl(foo_1.ts, 0, 0))
 >M1 : Symbol(foo.M1, Decl(foo_0.ts, 8, 1))
 
 var i: f.I2;
diff --git a/tests/baselines/reference/chainedImportAlias.symbols b/tests/baselines/reference/chainedImportAlias.symbols
index 0f374305aeb..d10e22af119 100644
--- a/tests/baselines/reference/chainedImportAlias.symbols
+++ b/tests/baselines/reference/chainedImportAlias.symbols
@@ -4,7 +4,7 @@ import x = require('./chainedImportAlias_file0');
 
 import y = x;
 >y : Symbol(y, Decl(chainedImportAlias_file1.ts, 0, 49))
->x : Symbol(x, Decl(chainedImportAlias_file0.ts, 0, 0))
+>x : Symbol(x, Decl(chainedImportAlias_file1.ts, 0, 0))
 
 y.m.foo();
 >y.m.foo : Symbol(x.m.foo, Decl(chainedImportAlias_file0.ts, 0, 17))
diff --git a/tests/baselines/reference/commonJSImportNotAsPrimaryExpression.symbols b/tests/baselines/reference/commonJSImportNotAsPrimaryExpression.symbols
index ae67c0a3175..a04bd7077c1 100644
--- a/tests/baselines/reference/commonJSImportNotAsPrimaryExpression.symbols
+++ b/tests/baselines/reference/commonJSImportNotAsPrimaryExpression.symbols
@@ -5,7 +5,7 @@ import foo = require("./foo_0");
 // None of the below should cause a runtime dependency on foo_0
 import f = foo.M1;
 >f : Symbol(f, Decl(foo_1.ts, 0, 32))
->foo : Symbol(foo, Decl(foo_0.ts, 0, 0))
+>foo : Symbol(foo, Decl(foo_1.ts, 0, 0))
 >M1 : Symbol(foo.M1, Decl(foo_0.ts, 8, 1))
 
 var i: f.I2;
diff --git a/tests/baselines/reference/declFileForExportedImport.symbols b/tests/baselines/reference/declFileForExportedImport.symbols
index fe14836199c..c9c36796826 100644
--- a/tests/baselines/reference/declFileForExportedImport.symbols
+++ b/tests/baselines/reference/declFileForExportedImport.symbols
@@ -11,7 +11,7 @@ var y = a.x;
 
 export import b = a;
 >b : Symbol(b, Decl(declFileForExportedImport_1.ts, 2, 12))
->a : Symbol(a, Decl(declFileForExportedImport_0.ts, 0, 0))
+>a : Symbol(a, Decl(declFileForExportedImport_1.ts, 0, 0))
 
 var z = b.x;
 >z : Symbol(z, Decl(declFileForExportedImport_1.ts, 5, 3))
diff --git a/tests/baselines/reference/declFileImportChainInExportAssignment.symbols b/tests/baselines/reference/declFileImportChainInExportAssignment.symbols
index 12e05bed75a..a47db44a02e 100644
--- a/tests/baselines/reference/declFileImportChainInExportAssignment.symbols
+++ b/tests/baselines/reference/declFileImportChainInExportAssignment.symbols
@@ -17,7 +17,7 @@ import a = m.c;
 
 import b = a;
 >b : Symbol(b, Decl(declFileImportChainInExportAssignment.ts, 6, 15))
->a : Symbol(a, Decl(declFileImportChainInExportAssignment.ts, 0, 10))
+>a : Symbol(a, Decl(declFileImportChainInExportAssignment.ts, 5, 1))
 
 export = b;
 >b : Symbol(b, Decl(declFileImportChainInExportAssignment.ts, 6, 15))
diff --git a/tests/baselines/reference/declarationEmit_nameConflicts.symbols b/tests/baselines/reference/declarationEmit_nameConflicts.symbols
index 1c5bb35b756..43657e85baf 100644
--- a/tests/baselines/reference/declarationEmit_nameConflicts.symbols
+++ b/tests/baselines/reference/declarationEmit_nameConflicts.symbols
@@ -37,7 +37,7 @@ export module M {
 
     export import d = im;
 >d : Symbol(d, Decl(declarationEmit_nameConflicts_0.ts, 11, 24))
->im : Symbol(d, Decl(declarationEmit_nameConflicts_1.ts, 0, 0))
+>im : Symbol(im, Decl(declarationEmit_nameConflicts_0.ts, 0, 0))
 }
 
 export module M.P {
diff --git a/tests/baselines/reference/dependencyViaImportAlias.symbols b/tests/baselines/reference/dependencyViaImportAlias.symbols
index 8855b8d6451..04c0a9a1a13 100644
--- a/tests/baselines/reference/dependencyViaImportAlias.symbols
+++ b/tests/baselines/reference/dependencyViaImportAlias.symbols
@@ -4,7 +4,7 @@ import a = require('A');
 
 import A = a.A;
 >A : Symbol(A, Decl(B.ts, 0, 24))
->a : Symbol(a, Decl(A.ts, 0, 0))
+>a : Symbol(a, Decl(B.ts, 0, 0))
 >A : Symbol(a.A, Decl(A.ts, 0, 0))
 
 export = A;
diff --git a/tests/baselines/reference/es6ImportNamedImportInIndirectExportAssignment.symbols b/tests/baselines/reference/es6ImportNamedImportInIndirectExportAssignment.symbols
index 24eab96f54b..77b93c3ef00 100644
--- a/tests/baselines/reference/es6ImportNamedImportInIndirectExportAssignment.symbols
+++ b/tests/baselines/reference/es6ImportNamedImportInIndirectExportAssignment.symbols
@@ -14,7 +14,7 @@ import { a } from "./es6ImportNamedImportInIndirectExportAssignment_0";
 
 import x = a;
 >x : Symbol(x, Decl(es6ImportNamedImportInIndirectExportAssignment_1.ts, 0, 71))
->a : Symbol(a, Decl(es6ImportNamedImportInIndirectExportAssignment_0.ts, 0, 0))
+>a : Symbol(a, Decl(es6ImportNamedImportInIndirectExportAssignment_1.ts, 0, 8))
 
 export = x;
 >x : Symbol(x, Decl(es6ImportNamedImportInIndirectExportAssignment_1.ts, 0, 71))
diff --git a/tests/baselines/reference/externalModuleReferenceDoubleUnderscore1.symbols b/tests/baselines/reference/externalModuleReferenceDoubleUnderscore1.symbols
index 02e5e6cfc5a..d4b995af6b2 100644
--- a/tests/baselines/reference/externalModuleReferenceDoubleUnderscore1.symbols
+++ b/tests/baselines/reference/externalModuleReferenceDoubleUnderscore1.symbols
@@ -5,7 +5,7 @@ declare module 'timezonecomplete' {
 
     export import TimeUnit = basics.TimeUnit;
 >TimeUnit : Symbol(TimeUnit, Decl(externalModuleReferenceDoubleUnderscore1.ts, 1, 57))
->basics : Symbol(basics, Decl(externalModuleReferenceDoubleUnderscore1.ts, 3, 1))
+>basics : Symbol(basics, Decl(externalModuleReferenceDoubleUnderscore1.ts, 0, 35))
 >TimeUnit : Symbol(basics.TimeUnit, Decl(externalModuleReferenceDoubleUnderscore1.ts, 5, 44))
 }
 
diff --git a/tests/baselines/reference/importAliasAnExternalModuleInsideAnInternalModule.symbols b/tests/baselines/reference/importAliasAnExternalModuleInsideAnInternalModule.symbols
index ffaca4a0ec5..ecc81c727e1 100644
--- a/tests/baselines/reference/importAliasAnExternalModuleInsideAnInternalModule.symbols
+++ b/tests/baselines/reference/importAliasAnExternalModuleInsideAnInternalModule.symbols
@@ -8,7 +8,7 @@ module m_private {
     //import r2 = require('m'); // would be error
     export import C = r; // no error
 >C : Symbol(C, Decl(importAliasAnExternalModuleInsideAnInternalModule_file1.ts, 1, 18))
->r : Symbol(C, Decl(importAliasAnExternalModuleInsideAnInternalModule_file0.ts, 0, 0))
+>r : Symbol(r, Decl(importAliasAnExternalModuleInsideAnInternalModule_file1.ts, 0, 0))
 
     C.m.foo();
 >C.m.foo : Symbol(C.m.foo, Decl(importAliasAnExternalModuleInsideAnInternalModule_file0.ts, 0, 17))
diff --git a/tests/baselines/reference/import_reference-exported-alias.symbols b/tests/baselines/reference/import_reference-exported-alias.symbols
index 5a7e8b8c5c7..10ccb7a9256 100644
--- a/tests/baselines/reference/import_reference-exported-alias.symbols
+++ b/tests/baselines/reference/import_reference-exported-alias.symbols
@@ -4,12 +4,12 @@ import appJs = require("file1");
 
 import Services = appJs.Services;
 >Services : Symbol(Services, Decl(file2.ts, 0, 32))
->appJs : Symbol(appJs, Decl(file1.ts, 0, 0))
+>appJs : Symbol(appJs, Decl(file2.ts, 0, 0))
 >Services : Symbol(appJs.Services, Decl(file1.ts, 0, 12))
 
 import UserServices = Services.UserServices;
 >UserServices : Symbol(UserServices, Decl(file2.ts, 1, 33))
->Services : Symbol(appJs.Services, Decl(file1.ts, 0, 12))
+>Services : Symbol(Services, Decl(file2.ts, 0, 32))
 >UserServices : Symbol(Services.UserServices, Decl(file1.ts, 1, 28))
 
 var x = new UserServices().getUserName();
diff --git a/tests/baselines/reference/import_reference-to-type-alias.symbols b/tests/baselines/reference/import_reference-to-type-alias.symbols
index 6d096c1cba3..996cf05be71 100644
--- a/tests/baselines/reference/import_reference-to-type-alias.symbols
+++ b/tests/baselines/reference/import_reference-to-type-alias.symbols
@@ -4,7 +4,7 @@ import appJs = require("file1");
 
 import Services = appJs.App.Services;
 >Services : Symbol(Services, Decl(file2.ts, 0, 32))
->appJs : Symbol(appJs, Decl(file1.ts, 0, 0))
+>appJs : Symbol(appJs, Decl(file2.ts, 0, 0))
 >App : Symbol(appJs.App, Decl(file1.ts, 0, 0))
 >Services : Symbol(Services, Decl(file1.ts, 0, 19))
 
diff --git a/tests/baselines/reference/importedAliasesInTypePositions.symbols b/tests/baselines/reference/importedAliasesInTypePositions.symbols
index 1d28900c22f..1ad3c4254f8 100644
--- a/tests/baselines/reference/importedAliasesInTypePositions.symbols
+++ b/tests/baselines/reference/importedAliasesInTypePositions.symbols
@@ -4,7 +4,7 @@ import RT_ALIAS = require("file1");
 
 import ReferredTo = RT_ALIAS.elaborate.nested.mod.name.ReferredTo;
 >ReferredTo : Symbol(ReferredTo, Decl(file2.ts, 0, 35))
->RT_ALIAS : Symbol(RT_ALIAS, Decl(file1.ts, 0, 0))
+>RT_ALIAS : Symbol(RT_ALIAS, Decl(file2.ts, 0, 0))
 >elaborate : Symbol(RT_ALIAS.elaborate, Decl(file1.ts, 0, 0))
 >nested : Symbol(RT_ALIAS.elaborate.nested, Decl(file1.ts, 0, 24))
 >mod : Symbol(RT_ALIAS.elaborate.nested.mod, Decl(file1.ts, 0, 31))
diff --git a/tests/baselines/reference/tsxPreserveEmit1.symbols b/tests/baselines/reference/tsxPreserveEmit1.symbols
index 53707b86104..b5651d7c38e 100644
--- a/tests/baselines/reference/tsxPreserveEmit1.symbols
+++ b/tests/baselines/reference/tsxPreserveEmit1.symbols
@@ -8,7 +8,7 @@ import ReactRouter = require('react-router');
 
 import Route = ReactRouter.Route;
 >Route : Symbol(Route, Decl(test.tsx, 2, 45))
->ReactRouter : Symbol(ReactRouter, Decl(react.d.ts, 4, 1))
+>ReactRouter : Symbol(ReactRouter, Decl(test.tsx, 1, 32))
 >Route : Symbol(ReactRouter.Route, Decl(react.d.ts, 7, 4))
 
 var routes1 = <Route />;
diff --git a/tests/cases/fourslash/renameAlias.ts b/tests/cases/fourslash/renameAlias.ts
new file mode 100644
index 00000000000..e3f57ac7b41
--- /dev/null
+++ b/tests/cases/fourslash/renameAlias.ts
@@ -0,0 +1,11 @@
+/// <reference path='fourslash.ts'/>
+
+////module SomeModule { export class SomeClass { } }
+////import [|M|] = SomeModule;
+////import C = [|M|].SomeClass;
+
+let ranges = test.ranges()
+for (let range of ranges) {
+    goTo.position(range.start);
+    verify.renameLocations(/*findInStrings*/ false, /*findInComments*/ false);
+}
\ No newline at end of file
diff --git a/tests/cases/fourslash/renameAlias2.ts b/tests/cases/fourslash/renameAlias2.ts
new file mode 100644
index 00000000000..da1bcf8248d
--- /dev/null
+++ b/tests/cases/fourslash/renameAlias2.ts
@@ -0,0 +1,11 @@
+/// <reference path='fourslash.ts'/>
+
+////module [|SomeModule|] { export class SomeClass { } }
+////import M = [|SomeModule|];
+////import C = M.SomeClass;
+
+let ranges = test.ranges()
+for (let range of ranges) {
+    goTo.position(range.start);
+    verify.renameLocations(/*findInStrings*/ false, /*findInComments*/ false);
+}
\ No newline at end of file
diff --git a/tests/cases/fourslash/renameAlias3.ts b/tests/cases/fourslash/renameAlias3.ts
new file mode 100644
index 00000000000..9172f052abb
--- /dev/null
+++ b/tests/cases/fourslash/renameAlias3.ts
@@ -0,0 +1,11 @@
+/// <reference path='fourslash.ts'/>
+
+////module SomeModule { export class [|SomeClass|] { } }
+////import M = SomeModule;
+////import C = M.[|SomeClass|];
+
+let ranges = test.ranges()
+for (let range of ranges) {
+    goTo.position(range.start);
+    verify.renameLocations(/*findInStrings*/ false, /*findInComments*/ false);
+}
\ No newline at end of file
diff --git a/tests/cases/fourslash/renameAliasExternalModule.ts b/tests/cases/fourslash/renameAliasExternalModule.ts
new file mode 100644
index 00000000000..54277fd6e64
--- /dev/null
+++ b/tests/cases/fourslash/renameAliasExternalModule.ts
@@ -0,0 +1,16 @@
+/// <reference path='fourslash.ts'/>
+
+// @Filename: a.ts
+////module SomeModule { export class SomeClass { } }
+////export = SomeModule;
+
+// @Filename: b.ts
+////import [|M|] = require("./a");
+////import C = [|M|].SomeClass;
+
+let ranges = test.ranges()
+for (let range of ranges) {
+    goTo.file(range.fileName);
+    goTo.position(range.start);
+    verify.renameLocations(/*findInStrings*/ false, /*findInComments*/ false);
+}
\ No newline at end of file
diff --git a/tests/cases/fourslash/renameAliasExternalModule2.ts b/tests/cases/fourslash/renameAliasExternalModule2.ts
new file mode 100644
index 00000000000..2d9d07efb68
--- /dev/null
+++ b/tests/cases/fourslash/renameAliasExternalModule2.ts
@@ -0,0 +1,16 @@
+/// <reference path='fourslash.ts'/>
+
+// @Filename: a.ts
+////module [|SomeModule|] { export class SomeClass { } }
+////export = [|SomeModule|];
+
+// @Filename: b.ts
+////import M = require("./a");
+////import C = M.SomeClass;
+
+let ranges = test.ranges()
+for (let range of ranges) {
+    goTo.file(range.fileName);
+    goTo.position(range.start);
+    verify.renameLocations(/*findInStrings*/ false, /*findInComments*/ false);
+}
\ No newline at end of file
diff --git a/tests/cases/fourslash/renameAliasExternalModule3.ts b/tests/cases/fourslash/renameAliasExternalModule3.ts
new file mode 100644
index 00000000000..acff9371c77
--- /dev/null
+++ b/tests/cases/fourslash/renameAliasExternalModule3.ts
@@ -0,0 +1,16 @@
+/// <reference path='fourslash.ts'/>
+
+// @Filename: a.ts
+////module SomeModule { export class [|SomeClass|] { } }
+////export = SomeModule;
+
+// @Filename: b.ts
+////import M = require("./a");
+////import C = M.[|SomeClass|];
+
+let ranges = test.ranges()
+for (let range of ranges) {
+    goTo.file(range.fileName);
+    goTo.position(range.start);
+    verify.renameLocations(/*findInStrings*/ false, /*findInComments*/ false);
+}
\ No newline at end of file

From 28f548a7405f89c2e8e60ddf35015cdd841572b2 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Tue, 24 May 2016 11:33:23 -0700
Subject: [PATCH 073/332] Recognize '-?' / '--?' in tsc

---
 src/compiler/commandLineParser.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 80d7f0b1f16..506a2d5bee4 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -37,6 +37,11 @@ namespace ts {
             type: "boolean",
             description: Diagnostics.Print_this_message,
         },
+        {
+            name: "help",
+            shortName: "?",
+            type: "boolean"
+        },
         {
             name: "init",
             type: "boolean",

From a323fdf49d823e9f2893d0dc609823f9ba5ca395 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 24 May 2016 13:07:34 -0700
Subject: [PATCH 074/332] Instantiate this-type in super property access

---
 src/compiler/checker.ts                       |   2 +-
 .../superPropertyAccessNoError.errors.txt     |  75 --------
 .../reference/superPropertyAccessNoError.js   |  20 +-
 .../superPropertyAccessNoError.symbols        | 161 ++++++++++++++++
 .../superPropertyAccessNoError.types          | 179 ++++++++++++++++++
 .../superPropertyAccessNoError.ts             |  12 +-
 6 files changed, 371 insertions(+), 78 deletions(-)
 delete mode 100644 tests/baselines/reference/superPropertyAccessNoError.errors.txt
 create mode 100644 tests/baselines/reference/superPropertyAccessNoError.symbols
 create mode 100644 tests/baselines/reference/superPropertyAccessNoError.types

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 489abd1ae51..2fd86fefe58 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -8569,7 +8569,7 @@ namespace ts {
 
             return nodeCheckFlag === NodeCheckFlags.SuperStatic
                 ? getBaseConstructorTypeOfClass(classType)
-                : baseClassType;
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
 
             function isLegalUsageOfSuperExpression(container: Node): boolean {
                 if (!container) {
diff --git a/tests/baselines/reference/superPropertyAccessNoError.errors.txt b/tests/baselines/reference/superPropertyAccessNoError.errors.txt
deleted file mode 100644
index e5b81c7a09b..00000000000
--- a/tests/baselines/reference/superPropertyAccessNoError.errors.txt
+++ /dev/null
@@ -1,75 +0,0 @@
-tests/cases/conformance/expressions/superPropertyAccess/superPropertyAccessNoError.ts(33,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/superPropertyAccess/superPropertyAccessNoError.ts(39,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/superPropertyAccess/superPropertyAccessNoError.ts(49,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-tests/cases/conformance/expressions/superPropertyAccess/superPropertyAccessNoError.ts(55,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-
-
-==== tests/cases/conformance/expressions/superPropertyAccess/superPropertyAccessNoError.ts (4 errors) ====
-    //super.publicInstanceMemberFunction in constructor of derived class
-    //super.publicInstanceMemberFunction in instance member function of derived class
-    //super.publicInstanceMemberFunction in instance member accessor(get and set) of derived class
-    //super.publicInstanceMemberFunction in lambda in member function
-    //super.publicStaticMemberFunction in static member function of derived class
-    //super.publicStaticMemberFunction in static member accessor(get and set) of derived class
-    
-    
-    class SomeBaseClass {
-        public func() {
-            return '';
-        }
-    
-        static func() {
-            return 3;
-        }
-    
-    }
-    
-    class SomeDerivedClass extends SomeBaseClass {
-        constructor() {
-            super();
-            var x = super.func();
-            var x: string;
-        }
-    
-        fn() {
-            var x = super.func();
-            var x: string;
-            var y = () => super.func();
-        }
-    
-        get a() {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var x = super.func();
-            var x: string;
-            return null;
-        }
-    
-        set a(n) {
-            ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var x = super.func();
-            var x: string;
-        }
-    
-        static fn() {
-            var x = super.func();
-            var x: number;
-        }
-    
-        static get a() {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var x = super.func();
-            var x: number;
-            return null;
-        }
-    
-        static set a(n) {
-                   ~
-!!! error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
-            var x = super.func();
-            var x: number;
-        }
-    
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/superPropertyAccessNoError.js b/tests/baselines/reference/superPropertyAccessNoError.js
index a9d2f88738e..df230ce3703 100644
--- a/tests/baselines/reference/superPropertyAccessNoError.js
+++ b/tests/baselines/reference/superPropertyAccessNoError.js
@@ -16,6 +16,9 @@ class SomeBaseClass {
         return 3;
     }
 
+    returnThis() {
+        return this;
+    }
 }
 
 class SomeDerivedClass extends SomeBaseClass {
@@ -58,7 +61,14 @@ class SomeDerivedClass extends SomeBaseClass {
         var x: number;
     }
 
-}
+    returnThis() {
+        return super.returnThis();
+    }
+}
+
+let instance = new SomeDerivedClass();
+instance.returnThis().fn();
+
 
 //// [superPropertyAccessNoError.js]
 //super.publicInstanceMemberFunction in constructor of derived class
@@ -81,6 +91,9 @@ var SomeBaseClass = (function () {
     SomeBaseClass.func = function () {
         return 3;
     };
+    SomeBaseClass.prototype.returnThis = function () {
+        return this;
+    };
     return SomeBaseClass;
 }());
 var SomeDerivedClass = (function (_super) {
@@ -126,5 +139,10 @@ var SomeDerivedClass = (function (_super) {
         enumerable: true,
         configurable: true
     });
+    SomeDerivedClass.prototype.returnThis = function () {
+        return _super.prototype.returnThis.call(this);
+    };
     return SomeDerivedClass;
 }(SomeBaseClass));
+var instance = new SomeDerivedClass();
+instance.returnThis().fn();
diff --git a/tests/baselines/reference/superPropertyAccessNoError.symbols b/tests/baselines/reference/superPropertyAccessNoError.symbols
new file mode 100644
index 00000000000..4ef033b24bf
--- /dev/null
+++ b/tests/baselines/reference/superPropertyAccessNoError.symbols
@@ -0,0 +1,161 @@
+=== tests/cases/conformance/expressions/superPropertyAccess/superPropertyAccessNoError.ts ===
+//super.publicInstanceMemberFunction in constructor of derived class
+//super.publicInstanceMemberFunction in instance member function of derived class
+//super.publicInstanceMemberFunction in instance member accessor(get and set) of derived class
+//super.publicInstanceMemberFunction in lambda in member function
+//super.publicStaticMemberFunction in static member function of derived class
+//super.publicStaticMemberFunction in static member accessor(get and set) of derived class
+
+
+class SomeBaseClass {
+>SomeBaseClass : Symbol(SomeBaseClass, Decl(superPropertyAccessNoError.ts, 0, 0))
+
+    public func() {
+>func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 8, 21))
+
+        return '';
+    }
+
+    static func() {
+>func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 11, 5))
+
+        return 3;
+    }
+
+    returnThis() {
+>returnThis : Symbol(SomeBaseClass.returnThis, Decl(superPropertyAccessNoError.ts, 15, 5))
+
+        return this;
+>this : Symbol(SomeBaseClass, Decl(superPropertyAccessNoError.ts, 0, 0))
+    }
+}
+
+class SomeDerivedClass extends SomeBaseClass {
+>SomeDerivedClass : Symbol(SomeDerivedClass, Decl(superPropertyAccessNoError.ts, 20, 1))
+>SomeBaseClass : Symbol(SomeBaseClass, Decl(superPropertyAccessNoError.ts, 0, 0))
+
+    constructor() {
+        super();
+>super : Symbol(SomeBaseClass, Decl(superPropertyAccessNoError.ts, 0, 0))
+
+        var x = super.func();
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 25, 11), Decl(superPropertyAccessNoError.ts, 26, 11))
+>super.func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 8, 21))
+>super : Symbol(SomeBaseClass, Decl(superPropertyAccessNoError.ts, 0, 0))
+>func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 8, 21))
+
+        var x: string;
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 25, 11), Decl(superPropertyAccessNoError.ts, 26, 11))
+    }
+
+    fn() {
+>fn : Symbol(SomeDerivedClass.fn, Decl(superPropertyAccessNoError.ts, 27, 5))
+
+        var x = super.func();
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 30, 11), Decl(superPropertyAccessNoError.ts, 31, 11))
+>super.func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 8, 21))
+>super : Symbol(SomeBaseClass, Decl(superPropertyAccessNoError.ts, 0, 0))
+>func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 8, 21))
+
+        var x: string;
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 30, 11), Decl(superPropertyAccessNoError.ts, 31, 11))
+
+        var y = () => super.func();
+>y : Symbol(y, Decl(superPropertyAccessNoError.ts, 32, 11))
+>super.func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 8, 21))
+>super : Symbol(SomeBaseClass, Decl(superPropertyAccessNoError.ts, 0, 0))
+>func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 8, 21))
+    }
+
+    get a() {
+>a : Symbol(SomeDerivedClass.a, Decl(superPropertyAccessNoError.ts, 33, 5), Decl(superPropertyAccessNoError.ts, 39, 5))
+
+        var x = super.func();
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 36, 11), Decl(superPropertyAccessNoError.ts, 37, 11))
+>super.func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 8, 21))
+>super : Symbol(SomeBaseClass, Decl(superPropertyAccessNoError.ts, 0, 0))
+>func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 8, 21))
+
+        var x: string;
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 36, 11), Decl(superPropertyAccessNoError.ts, 37, 11))
+
+        return null;
+    }
+
+    set a(n) {
+>a : Symbol(SomeDerivedClass.a, Decl(superPropertyAccessNoError.ts, 33, 5), Decl(superPropertyAccessNoError.ts, 39, 5))
+>n : Symbol(n, Decl(superPropertyAccessNoError.ts, 41, 10))
+
+        var x = super.func();
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 42, 11), Decl(superPropertyAccessNoError.ts, 43, 11))
+>super.func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 8, 21))
+>super : Symbol(SomeBaseClass, Decl(superPropertyAccessNoError.ts, 0, 0))
+>func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 8, 21))
+
+        var x: string;
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 42, 11), Decl(superPropertyAccessNoError.ts, 43, 11))
+    }
+
+    static fn() {
+>fn : Symbol(SomeDerivedClass.fn, Decl(superPropertyAccessNoError.ts, 44, 5))
+
+        var x = super.func();
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 47, 11), Decl(superPropertyAccessNoError.ts, 48, 11))
+>super.func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 11, 5))
+>super : Symbol(SomeBaseClass, Decl(superPropertyAccessNoError.ts, 0, 0))
+>func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 11, 5))
+
+        var x: number;
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 47, 11), Decl(superPropertyAccessNoError.ts, 48, 11))
+    }
+
+    static get a() {
+>a : Symbol(SomeDerivedClass.a, Decl(superPropertyAccessNoError.ts, 49, 5), Decl(superPropertyAccessNoError.ts, 55, 5))
+
+        var x = super.func();
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 52, 11), Decl(superPropertyAccessNoError.ts, 53, 11))
+>super.func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 11, 5))
+>super : Symbol(SomeBaseClass, Decl(superPropertyAccessNoError.ts, 0, 0))
+>func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 11, 5))
+
+        var x: number;
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 52, 11), Decl(superPropertyAccessNoError.ts, 53, 11))
+
+        return null;
+    }
+
+    static set a(n) {
+>a : Symbol(SomeDerivedClass.a, Decl(superPropertyAccessNoError.ts, 49, 5), Decl(superPropertyAccessNoError.ts, 55, 5))
+>n : Symbol(n, Decl(superPropertyAccessNoError.ts, 57, 17))
+
+        var x = super.func();
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 58, 11), Decl(superPropertyAccessNoError.ts, 59, 11))
+>super.func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 11, 5))
+>super : Symbol(SomeBaseClass, Decl(superPropertyAccessNoError.ts, 0, 0))
+>func : Symbol(SomeBaseClass.func, Decl(superPropertyAccessNoError.ts, 11, 5))
+
+        var x: number;
+>x : Symbol(x, Decl(superPropertyAccessNoError.ts, 58, 11), Decl(superPropertyAccessNoError.ts, 59, 11))
+    }
+
+    returnThis() {
+>returnThis : Symbol(SomeDerivedClass.returnThis, Decl(superPropertyAccessNoError.ts, 60, 5))
+
+        return super.returnThis();
+>super.returnThis : Symbol(SomeBaseClass.returnThis, Decl(superPropertyAccessNoError.ts, 15, 5))
+>super : Symbol(SomeBaseClass, Decl(superPropertyAccessNoError.ts, 0, 0))
+>returnThis : Symbol(SomeBaseClass.returnThis, Decl(superPropertyAccessNoError.ts, 15, 5))
+    }
+}
+
+let instance = new SomeDerivedClass();
+>instance : Symbol(instance, Decl(superPropertyAccessNoError.ts, 67, 3))
+>SomeDerivedClass : Symbol(SomeDerivedClass, Decl(superPropertyAccessNoError.ts, 20, 1))
+
+instance.returnThis().fn();
+>instance.returnThis().fn : Symbol(SomeDerivedClass.fn, Decl(superPropertyAccessNoError.ts, 27, 5))
+>instance.returnThis : Symbol(SomeDerivedClass.returnThis, Decl(superPropertyAccessNoError.ts, 60, 5))
+>instance : Symbol(instance, Decl(superPropertyAccessNoError.ts, 67, 3))
+>returnThis : Symbol(SomeDerivedClass.returnThis, Decl(superPropertyAccessNoError.ts, 60, 5))
+>fn : Symbol(SomeDerivedClass.fn, Decl(superPropertyAccessNoError.ts, 27, 5))
+
diff --git a/tests/baselines/reference/superPropertyAccessNoError.types b/tests/baselines/reference/superPropertyAccessNoError.types
new file mode 100644
index 00000000000..b982b2ab694
--- /dev/null
+++ b/tests/baselines/reference/superPropertyAccessNoError.types
@@ -0,0 +1,179 @@
+=== tests/cases/conformance/expressions/superPropertyAccess/superPropertyAccessNoError.ts ===
+//super.publicInstanceMemberFunction in constructor of derived class
+//super.publicInstanceMemberFunction in instance member function of derived class
+//super.publicInstanceMemberFunction in instance member accessor(get and set) of derived class
+//super.publicInstanceMemberFunction in lambda in member function
+//super.publicStaticMemberFunction in static member function of derived class
+//super.publicStaticMemberFunction in static member accessor(get and set) of derived class
+
+
+class SomeBaseClass {
+>SomeBaseClass : SomeBaseClass
+
+    public func() {
+>func : () => string
+
+        return '';
+>'' : string
+    }
+
+    static func() {
+>func : () => number
+
+        return 3;
+>3 : number
+    }
+
+    returnThis() {
+>returnThis : () => this
+
+        return this;
+>this : this
+    }
+}
+
+class SomeDerivedClass extends SomeBaseClass {
+>SomeDerivedClass : SomeDerivedClass
+>SomeBaseClass : SomeBaseClass
+
+    constructor() {
+        super();
+>super() : void
+>super : typeof SomeBaseClass
+
+        var x = super.func();
+>x : string
+>super.func() : string
+>super.func : () => string
+>super : SomeBaseClass
+>func : () => string
+
+        var x: string;
+>x : string
+    }
+
+    fn() {
+>fn : () => void
+
+        var x = super.func();
+>x : string
+>super.func() : string
+>super.func : () => string
+>super : SomeBaseClass
+>func : () => string
+
+        var x: string;
+>x : string
+
+        var y = () => super.func();
+>y : () => string
+>() => super.func() : () => string
+>super.func() : string
+>super.func : () => string
+>super : SomeBaseClass
+>func : () => string
+    }
+
+    get a() {
+>a : any
+
+        var x = super.func();
+>x : string
+>super.func() : string
+>super.func : () => string
+>super : SomeBaseClass
+>func : () => string
+
+        var x: string;
+>x : string
+
+        return null;
+>null : null
+    }
+
+    set a(n) {
+>a : any
+>n : any
+
+        var x = super.func();
+>x : string
+>super.func() : string
+>super.func : () => string
+>super : SomeBaseClass
+>func : () => string
+
+        var x: string;
+>x : string
+    }
+
+    static fn() {
+>fn : () => void
+
+        var x = super.func();
+>x : number
+>super.func() : number
+>super.func : () => number
+>super : typeof SomeBaseClass
+>func : () => number
+
+        var x: number;
+>x : number
+    }
+
+    static get a() {
+>a : any
+
+        var x = super.func();
+>x : number
+>super.func() : number
+>super.func : () => number
+>super : typeof SomeBaseClass
+>func : () => number
+
+        var x: number;
+>x : number
+
+        return null;
+>null : null
+    }
+
+    static set a(n) {
+>a : any
+>n : any
+
+        var x = super.func();
+>x : number
+>super.func() : number
+>super.func : () => number
+>super : typeof SomeBaseClass
+>func : () => number
+
+        var x: number;
+>x : number
+    }
+
+    returnThis() {
+>returnThis : () => this
+
+        return super.returnThis();
+>super.returnThis() : this
+>super.returnThis : () => this
+>super : SomeBaseClass
+>returnThis : () => this
+    }
+}
+
+let instance = new SomeDerivedClass();
+>instance : SomeDerivedClass
+>new SomeDerivedClass() : SomeDerivedClass
+>SomeDerivedClass : typeof SomeDerivedClass
+
+instance.returnThis().fn();
+>instance.returnThis().fn() : void
+>instance.returnThis().fn : () => void
+>instance.returnThis() : SomeDerivedClass
+>instance.returnThis : () => SomeDerivedClass
+>instance : SomeDerivedClass
+>returnThis : () => SomeDerivedClass
+>fn : () => void
+
diff --git a/tests/cases/conformance/expressions/superPropertyAccess/superPropertyAccessNoError.ts b/tests/cases/conformance/expressions/superPropertyAccess/superPropertyAccessNoError.ts
index f88b546dcfd..dcc167f2aef 100644
--- a/tests/cases/conformance/expressions/superPropertyAccess/superPropertyAccessNoError.ts
+++ b/tests/cases/conformance/expressions/superPropertyAccess/superPropertyAccessNoError.ts
@@ -1,3 +1,4 @@
+// @target: es5
 //super.publicInstanceMemberFunction in constructor of derived class
 //super.publicInstanceMemberFunction in instance member function of derived class
 //super.publicInstanceMemberFunction in instance member accessor(get and set) of derived class
@@ -15,6 +16,9 @@ class SomeBaseClass {
         return 3;
     }
 
+    returnThis() {
+        return this;
+    }
 }
 
 class SomeDerivedClass extends SomeBaseClass {
@@ -57,4 +61,10 @@ class SomeDerivedClass extends SomeBaseClass {
         var x: number;
     }
 
-}
\ No newline at end of file
+    returnThis() {
+        return super.returnThis();
+    }
+}
+
+let instance = new SomeDerivedClass();
+instance.returnThis().fn();

From 975ed9cb171767f0720d31a9d7c151dad53785b3 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 24 May 2016 13:57:12 -0700
Subject: [PATCH 075/332] Avoid linting files twice

---
 Jakefile.js | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/Jakefile.js b/Jakefile.js
index 6c7724116ad..55113f986bc 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -981,19 +981,22 @@ var lintTargets = compilerSources
     .concat(tslintRulesFiles)
     .concat(servicesLintTargets);
 
+
 desc("Runs tslint on the compiler sources. Optional arguments are: f[iles]=regex");
 task("lint", ["build-rules"], function() {
     var lintOptions = getLinterOptions();
     var failed = 0;
     var fileMatcher = RegExp(process.env.f || process.env.file || process.env.files || "");
+    var done = {};
     for (var i in lintTargets) {
         var target = lintTargets[i];
-        if (fileMatcher.test(target)) {
+        if (!done[target] && fileMatcher.test(target)) {
             var result = lintFile(lintOptions, target);
             if (result.failureCount > 0) {
                 console.log(result.output);
                 failed += result.failureCount;
             }
+            done[target] = true;
         }
     }
     if (failed > 0) {

From 5f7bbbf8fdb949c32e1d68e2dc1efb45a59f4a1e Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Tue, 24 May 2016 14:29:52 -0700
Subject: [PATCH 076/332] unconditionnaly use linter for non-parallel run

---
 Jakefile.js | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/Jakefile.js b/Jakefile.js
index 73bfdfdaedf..7be070bc492 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -735,9 +735,7 @@ function runConsoleTests(defaultReporter, runInParallel) {
         var cmd = "mocha" + (debug ? " --debug-brk" : "") + " -R " + reporter + tests + colors + ' -t ' + testTimeout + ' ' + run;
         console.log(cmd);
         exec(cmd, function () {
-            if (i === 0) {
-                runLinter();
-            }
+            runLinter();
             finish();
         }, finish);
         

From 699dc4f9bb452646b72883378bc7401e013ae390 Mon Sep 17 00:00:00 2001
From: Rado Kirov <radokirov@google.com>
Date: Thu, 19 May 2016 17:15:26 -0700
Subject: [PATCH 077/332] do not emit double assigment of class expressions.

Closure compiler ES6 support rejects expressions of the form `let A = B
= class {}`

With a small rewriting of the emitted code the case of decorated and
staticly referenced classes, TypeScript ES6 emit satisfies this
requirement.

Before:
let C_1;
let C = C_1 = class C {};

After:
let C_1 = class C {};
let C_1 = C;
---
 src/compiler/emitter.ts                       | 46 +++++++++++--------
 .../reference/decoratorOnClass5.es6.js        |  4 +-
 .../reference/decoratorOnClass6.es6.js        |  4 +-
 .../reference/decoratorOnClass7.es6.js        |  4 +-
 4 files changed, 34 insertions(+), 24 deletions(-)

diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index f27557a9136..f225b4cacf8 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -5359,17 +5359,17 @@ const _super = (function (geti, seti) {
                         //
                         //  TypeScript                      | Javascript
                         //  --------------------------------|------------------------------------
-                        //  @dec                            | let C_1;
-                        //  class C {                       | let C = C_1 = class C {
-                        //    static x() { return C.y; }    |   static x() { return C_1.y; }
-                        //    static y = 1;                 | }
+                        //  @dec                            | let C_1 = class C {
+                        //  class C {                       |   static x() { return C_1.y; }
+                        //    static x() { return C.y; }    | }
+                        //    static y = 1;                 | let C = C_1;
                         //  }                               | C.y = 1;
                         //                                  | C = C_1 = __decorate([dec], C);
                         //  --------------------------------|------------------------------------
-                        //  @dec                            | let C_1;
-                        //  export class C {                | export let C = C_1 = class C {
-                        //    static x() { return C.y; }    |   static x() { return C_1.y; }
-                        //    static y = 1;                 | }
+                        //  @dec                            | let C_1 = class C {
+                        //  export class C {                |   static x() { return C_1.y; }
+                        //    static x() { return C.y; }    | }
+                        //    static y = 1;                 | export let C = C_1;
                         //  }                               | C.y = 1;
                         //                                  | C = C_1 = __decorate([dec], C);
                         //  ---------------------------------------------------------------------
@@ -5398,10 +5398,10 @@ const _super = (function (geti, seti) {
                         //
                         //  TypeScript                      | Javascript
                         //  --------------------------------|------------------------------------
-                        //  @dec                            | let C_1;
-                        //  export default class C {        | let C = C_1 = class C {
-                        //    static x() { return C.y; }    |   static x() { return C_1.y; }
-                        //    static y = 1;                 | }
+                        //  @dec                            | let C_1 = class C {
+                        //  export default class C {        |   static x() { return C_1.y; }
+                        //    static x() { return C.y; }    | };
+                        //    static y = 1;                 | let C = C_1;
                         //  }                               | C.y = 1;
                         //                                  | C = C_1 = __decorate([dec], C);
                         //                                  | export default C;
@@ -5410,25 +5410,25 @@ const _super = (function (geti, seti) {
                         //
 
                         // NOTE: we reuse the same rewriting logic for cases when targeting ES6 and module kind is System.
-                        // Because of hoisting top level class declaration need to be emitted as class expressions. 
+                        // Because of hoisting top level class declaration need to be emitted as class expressions.
                         // Double bind case is only required if node is decorated.
                         if (isDecorated && resolver.getNodeCheckFlags(node) & NodeCheckFlags.ClassWithBodyScopedClassBinding) {
                             decoratedClassAlias = unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default"));
                             decoratedClassAliases[getNodeId(node)] = decoratedClassAlias;
-                            write(`let ${decoratedClassAlias};`);
-                            writeLine();
                         }
 
-                        if (isES6ExportedDeclaration(node) && !(node.flags & NodeFlags.Default)) {
+                        if (isES6ExportedDeclaration(node) && !(node.flags & NodeFlags.Default) && decoratedClassAlias === undefined) {
                             write("export ");
                         }
 
                         if (!isHoistedDeclarationInSystemModule) {
                             write("let ");
                         }
-                        emitDeclarationName(node);
                         if (decoratedClassAlias !== undefined) {
-                            write(` = ${decoratedClassAlias}`);
+                            write(`${decoratedClassAlias}`);
+                        }
+                        else {
+                            emitDeclarationName(node);
                         }
 
                         write(" = ");
@@ -5490,6 +5490,16 @@ const _super = (function (geti, seti) {
                 emitToken(SyntaxKind.CloseBraceToken, node.members.end);
 
                 if (rewriteAsClassExpression) {
+                    if (decoratedClassAlias !== undefined) {
+                        write(";");
+                        writeLine();
+                        if (isES6ExportedDeclaration(node) && !(node.flags & NodeFlags.Default)) {
+                            write("export ");
+                        }
+                        write("let ");
+                        emitDeclarationName(node);
+                        write(` = ${decoratedClassAlias}`);
+                    }
                     decoratedClassAliases[getNodeId(node)] = undefined;
                     write(";");
                 }
diff --git a/tests/baselines/reference/decoratorOnClass5.es6.js b/tests/baselines/reference/decoratorOnClass5.es6.js
index 58c5f0d4f29..e34740d6517 100644
--- a/tests/baselines/reference/decoratorOnClass5.es6.js
+++ b/tests/baselines/reference/decoratorOnClass5.es6.js
@@ -16,10 +16,10 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
     else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
     return c > 3 && r && Object.defineProperty(target, key, r), r;
 };
-let C_1;
-let C = C_1 = class C {
+let C_1 = class C {
     static x() { return C_1.y; }
 };
+let C = C_1;
 C.y = 1;
 C = C_1 = __decorate([
     dec
diff --git a/tests/baselines/reference/decoratorOnClass6.es6.js b/tests/baselines/reference/decoratorOnClass6.es6.js
index 03b8ace2b5b..0861774bfc0 100644
--- a/tests/baselines/reference/decoratorOnClass6.es6.js
+++ b/tests/baselines/reference/decoratorOnClass6.es6.js
@@ -16,10 +16,10 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
     else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
     return c > 3 && r && Object.defineProperty(target, key, r), r;
 };
-let C_1;
-export let C = C_1 = class C {
+let C_1 = class C {
     static x() { return C_1.y; }
 };
+export let C = C_1;
 C.y = 1;
 C = C_1 = __decorate([
     dec
diff --git a/tests/baselines/reference/decoratorOnClass7.es6.js b/tests/baselines/reference/decoratorOnClass7.es6.js
index 3ffd0f1574f..7f111ea4abf 100644
--- a/tests/baselines/reference/decoratorOnClass7.es6.js
+++ b/tests/baselines/reference/decoratorOnClass7.es6.js
@@ -16,10 +16,10 @@ var __decorate = (this && this.__decorate) || function (decorators, target, key,
     else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
     return c > 3 && r && Object.defineProperty(target, key, r), r;
 };
-let C_1;
-let C = C_1 = class C {
+let C_1 = class C {
     static x() { return C_1.y; }
 };
+let C = C_1;
 C.y = 1;
 C = C_1 = __decorate([
     dec

From 7cb2db7f9efd9d6e3efe1a7fe8e221cdbd6375fd Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Tue, 24 May 2016 20:09:15 -0700
Subject: [PATCH 078/332] Fix #8795: make properties defined in optional
 constructor paramters optional

---
 src/compiler/binder.ts                        |  2 +-
 .../assignmentCompatability10.errors.txt      | 17 ----------
 .../optionalParameterProperty.errors.txt      | 23 +++++++++++++
 .../reference/optionalParameterProperty.js    | 32 +++++++++++++++++++
 ...opertyParameterWithQuestionMark.errors.txt | 25 ++++++---------
 .../propertyParameterWithQuestionMark.js      | 16 +++++-----
 .../compiler/optionalParameterProperty.ts     | 11 +++++++
 .../propertyParameterWithQuestionMark.ts      |  8 ++---
 8 files changed, 89 insertions(+), 45 deletions(-)
 delete mode 100644 tests/baselines/reference/assignmentCompatability10.errors.txt
 create mode 100644 tests/baselines/reference/optionalParameterProperty.errors.txt
 create mode 100644 tests/baselines/reference/optionalParameterProperty.js
 create mode 100644 tests/cases/compiler/optionalParameterProperty.ts

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 304e77271a7..d05b6c9f82c 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -2027,7 +2027,7 @@ namespace ts {
             // containing class.
             if (isParameterPropertyDeclaration(node)) {
                 const classDeclaration = <ClassLikeDeclaration>node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, SymbolFlags.Property, SymbolFlags.PropertyExcludes);
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, SymbolFlags.Property | (node.questionToken ? SymbolFlags.Optional : SymbolFlags.None), SymbolFlags.PropertyExcludes);
             }
         }
 
diff --git a/tests/baselines/reference/assignmentCompatability10.errors.txt b/tests/baselines/reference/assignmentCompatability10.errors.txt
deleted file mode 100644
index 883bf1c277c..00000000000
--- a/tests/baselines/reference/assignmentCompatability10.errors.txt
+++ /dev/null
@@ -1,17 +0,0 @@
-tests/cases/compiler/assignmentCompatability10.ts(9,1): error TS2322: Type 'interfaceWithPublicAndOptional<number, string>' is not assignable to type 'classWithPublicAndOptional<number, string>'.
-  Property 'two' is optional in type 'interfaceWithPublicAndOptional<number, string>' but required in type 'classWithPublicAndOptional<number, string>'.
-
-
-==== tests/cases/compiler/assignmentCompatability10.ts (1 errors) ====
-    module __test1__ {
-        export interface interfaceWithPublicAndOptional<T,U> { one: T; two?: U; };  var obj4: interfaceWithPublicAndOptional<number,string> = { one: 1 };;
-        export var __val__obj4 = obj4;
-    }
-    module __test2__ {
-        export class classWithPublicAndOptional<T,U> { constructor(public one: T, public two?: U) {} }   var x4 = new classWithPublicAndOptional<number, string>(1);;
-        export var __val__x4 = x4;
-    }
-    __test2__.__val__x4 = __test1__.__val__obj4
-    ~~~~~~~~~~~~~~~~~~~
-!!! error TS2322: Type 'interfaceWithPublicAndOptional<number, string>' is not assignable to type 'classWithPublicAndOptional<number, string>'.
-!!! error TS2322:   Property 'two' is optional in type 'interfaceWithPublicAndOptional<number, string>' but required in type 'classWithPublicAndOptional<number, string>'.
\ No newline at end of file
diff --git a/tests/baselines/reference/optionalParameterProperty.errors.txt b/tests/baselines/reference/optionalParameterProperty.errors.txt
new file mode 100644
index 00000000000..d585ff6964d
--- /dev/null
+++ b/tests/baselines/reference/optionalParameterProperty.errors.txt
@@ -0,0 +1,23 @@
+tests/cases/compiler/optionalParameterProperty.ts(6,7): error TS2415: Class 'D' incorrectly extends base class 'C'.
+  Types of property 'p' are incompatible.
+    Type 'number | undefined' is not assignable to type 'number'.
+      Type 'undefined' is not assignable to type 'number'.
+
+
+==== tests/cases/compiler/optionalParameterProperty.ts (1 errors) ====
+    
+    class C {
+        p: number;
+    }
+    
+    class D extends C { 
+          ~
+!!! error TS2415: Class 'D' incorrectly extends base class 'C'.
+!!! error TS2415:   Types of property 'p' are incompatible.
+!!! error TS2415:     Type 'number | undefined' is not assignable to type 'number'.
+!!! error TS2415:       Type 'undefined' is not assignable to type 'number'.
+        constructor(public p?: number) {
+            super();
+        }
+    }
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/optionalParameterProperty.js b/tests/baselines/reference/optionalParameterProperty.js
new file mode 100644
index 00000000000..48cefeef22c
--- /dev/null
+++ b/tests/baselines/reference/optionalParameterProperty.js
@@ -0,0 +1,32 @@
+//// [optionalParameterProperty.ts]
+
+class C {
+    p: number;
+}
+
+class D extends C { 
+    constructor(public p?: number) {
+        super();
+    }
+}
+
+
+//// [optionalParameterProperty.js]
+var __extends = (this && this.__extends) || function (d, b) {
+    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+};
+var C = (function () {
+    function C() {
+    }
+    return C;
+}());
+var D = (function (_super) {
+    __extends(D, _super);
+    function D(p) {
+        _super.call(this);
+        this.p = p;
+    }
+    return D;
+}(C));
diff --git a/tests/baselines/reference/propertyParameterWithQuestionMark.errors.txt b/tests/baselines/reference/propertyParameterWithQuestionMark.errors.txt
index b3970c216eb..76dfb503e52 100644
--- a/tests/baselines/reference/propertyParameterWithQuestionMark.errors.txt
+++ b/tests/baselines/reference/propertyParameterWithQuestionMark.errors.txt
@@ -1,22 +1,17 @@
-tests/cases/compiler/propertyParameterWithQuestionMark.ts(6,5): error TS2322: Type '{}' is not assignable to type 'C'.
-  Property 'x' is missing in type '{}'.
-tests/cases/compiler/propertyParameterWithQuestionMark.ts(8,1): error TS2322: Type '{ x?: any; }' is not assignable to type 'C'.
-  Property 'x' is optional in type '{ x?: any; }' but required in type 'C'.
+tests/cases/compiler/propertyParameterWithQuestionMark.ts(9,5): error TS2322: Type 'C' is not assignable to type '{ x: any; }'.
+  Property 'x' is optional in type 'C' but required in type '{ x: any; }'.
 
 
-==== tests/cases/compiler/propertyParameterWithQuestionMark.ts (2 errors) ====
+==== tests/cases/compiler/propertyParameterWithQuestionMark.ts (1 errors) ====
     class C {
         constructor(public x?) { }
     }
     
-    // x should not be an optional property
-    var v: C = {}; // Should fail
-        ~
-!!! error TS2322: Type '{}' is not assignable to type 'C'.
-!!! error TS2322:   Property 'x' is missing in type '{}'.
+    // x should be an optional property
+    var v: C = {}; // Should succeed
     var v2: { x? }
-    v = v2; // Should fail
-    ~
-!!! error TS2322: Type '{ x?: any; }' is not assignable to type 'C'.
-!!! error TS2322:   Property 'x' is optional in type '{ x?: any; }' but required in type 'C'.
-    var v3: { x } = new C; // Should succeed
\ No newline at end of file
+    v = v2; // Should succeed
+    var v3: { x } = new C; // Should fail
+        ~~
+!!! error TS2322: Type 'C' is not assignable to type '{ x: any; }'.
+!!! error TS2322:   Property 'x' is optional in type 'C' but required in type '{ x: any; }'.
\ No newline at end of file
diff --git a/tests/baselines/reference/propertyParameterWithQuestionMark.js b/tests/baselines/reference/propertyParameterWithQuestionMark.js
index 511062663e8..b72638387dd 100644
--- a/tests/baselines/reference/propertyParameterWithQuestionMark.js
+++ b/tests/baselines/reference/propertyParameterWithQuestionMark.js
@@ -3,11 +3,11 @@ class C {
     constructor(public x?) { }
 }
 
-// x should not be an optional property
-var v: C = {}; // Should fail
+// x should be an optional property
+var v: C = {}; // Should succeed
 var v2: { x? }
-v = v2; // Should fail
-var v3: { x } = new C; // Should succeed
+v = v2; // Should succeed
+var v3: { x } = new C; // Should fail
 
 //// [propertyParameterWithQuestionMark.js]
 var C = (function () {
@@ -16,8 +16,8 @@ var C = (function () {
     }
     return C;
 }());
-// x should not be an optional property
-var v = {}; // Should fail
+// x should be an optional property
+var v = {}; // Should succeed
 var v2;
-v = v2; // Should fail
-var v3 = new C; // Should succeed
+v = v2; // Should succeed
+var v3 = new C; // Should fail
diff --git a/tests/cases/compiler/optionalParameterProperty.ts b/tests/cases/compiler/optionalParameterProperty.ts
new file mode 100644
index 00000000000..1f547d4af26
--- /dev/null
+++ b/tests/cases/compiler/optionalParameterProperty.ts
@@ -0,0 +1,11 @@
+// @strictNullChecks: true
+
+class C {
+    p: number;
+}
+
+class D extends C { 
+    constructor(public p?: number) {
+        super();
+    }
+}
diff --git a/tests/cases/compiler/propertyParameterWithQuestionMark.ts b/tests/cases/compiler/propertyParameterWithQuestionMark.ts
index 1a0eedb799e..ce2d88669c3 100644
--- a/tests/cases/compiler/propertyParameterWithQuestionMark.ts
+++ b/tests/cases/compiler/propertyParameterWithQuestionMark.ts
@@ -2,8 +2,8 @@ class C {
     constructor(public x?) { }
 }
 
-// x should not be an optional property
-var v: C = {}; // Should fail
+// x should be an optional property
+var v: C = {}; // Should succeed
 var v2: { x? }
-v = v2; // Should fail
-var v3: { x } = new C; // Should succeed
\ No newline at end of file
+v = v2; // Should succeed
+var v3: { x } = new C; // Should fail
\ No newline at end of file

From 5b4e964ae8afebe71997da0e00a0723e590a6670 Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Wed, 25 May 2016 00:06:47 -0700
Subject: [PATCH 079/332] do not swallow test execution errors

---
 Jakefile.js | 35 +++++++++++++++++++++++++----------
 1 file changed, 25 insertions(+), 10 deletions(-)

diff --git a/Jakefile.js b/Jakefile.js
index 55113f986bc..7cf6e67bb06 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -726,24 +726,39 @@ function runConsoleTests(defaultReporter, defaultSubsets) {
         subsetRegexes = subsets.map(function (sub) { return "^" + sub + ".*$"; });
         subsetRegexes.push("^(?!" + subsets.join("|") + ").*$");
     }
+    var counter = subsetRegexes.length;
+    var errorStatus;
     subsetRegexes.forEach(function (subsetRegex, i) {
         tests = subsetRegex ? ' -g "' + subsetRegex + '"' : '';
         var cmd = "mocha" + (debug ? " --debug-brk" : "") + " -R " + reporter + tests + colors + ' -t ' + testTimeout + ' ' + run;
         console.log(cmd);
-        function finish() {
+        function finish(status) {
+            counter--;
+            // save first error status
+            if (status !== undefined && errorStatus === undefined) {
+                errorStatus = status;
+            }
+
             deleteTemporaryProjectOutput();
-            complete();
+            if (counter !== 0 || errorStatus === undefined) {
+                if (lintFlag) {
+                    var lint = jake.Task['lint'];
+                    lint.addListener('complete', function () {
+                        complete();
+                    });
+                    lint.invoke();
+                }
+                complete();
+            }
+            else {
+                fail("Process exited with code " + status);
+            }
         }
         exec(cmd, function () {
-            if (lintFlag && i === 0) {
-                var lint = jake.Task['lint'];
-                lint.addListener('complete', function () {
-                    complete();
-                });
-                lint.invoke();
-            }
             finish();
-        }, finish);
+        }, function(e, status) {
+            finish(status);
+        });
     });
 }
 

From bd633c828f1c474ab2d928c5737365db92a859a4 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 25 May 2016 06:32:55 -0700
Subject: [PATCH 080/332] Lint all servicesSources

---
 Jakefile.js                                   |  13 +-
 scripts/tslint/noIncrementDecrementRule.ts    |  11 +-
 src/services/breakpoints.ts                   |  38 ++--
 src/services/formatting/formatting.ts         | 210 +++++++++---------
 src/services/formatting/formattingContext.ts  |  16 +-
 src/services/formatting/formattingScanner.ts  |  35 ++-
 src/services/formatting/ruleOperation.ts      |   5 +-
 .../formatting/ruleOperationContext.ts        |   4 +-
 src/services/formatting/rules.ts              |  24 +-
 src/services/formatting/rulesMap.ts           |  31 +--
 src/services/formatting/rulesProvider.ts      |   5 +-
 src/services/formatting/smartIndenter.ts      |  72 +++---
 src/services/formatting/tokenRange.ts         |   4 +-
 src/services/signatureHelp.ts                 | 148 ++++++------
 src/services/utilities.ts                     |  92 ++++----
 15 files changed, 348 insertions(+), 360 deletions(-)

diff --git a/Jakefile.js b/Jakefile.js
index 55113f986bc..5bf30c824cd 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -962,24 +962,13 @@ function lintFileAsync(options, path, cb) {
     });
 }
 
-var servicesLintTargets = [
-    "navigateTo.ts",
-    "navigationBar.ts",
-    "outliningElementsCollector.ts",
-    "patternMatcher.ts",
-    "services.ts",
-    "shims.ts",
-    "jsTyping.ts"
-].map(function (s) {
-    return path.join(servicesDirectory, s);
-});
 var lintTargets = compilerSources
     .concat(harnessSources)
     // Other harness sources
     .concat(["instrumenter.ts"].map(function(f) { return path.join(harnessDirectory, f) }))
     .concat(serverCoreSources)
     .concat(tslintRulesFiles)
-    .concat(servicesLintTargets);
+    .concat(servicesSources);
 
 
 desc("Runs tslint on the compiler sources. Optional arguments are: f[iles]=regex");
diff --git a/scripts/tslint/noIncrementDecrementRule.ts b/scripts/tslint/noIncrementDecrementRule.ts
index 75f4d2f5c08..f5c90abe893 100644
--- a/scripts/tslint/noIncrementDecrementRule.ts
+++ b/scripts/tslint/noIncrementDecrementRule.ts
@@ -28,8 +28,15 @@ class IncrementDecrementWalker extends Lint.RuleWalker {
     }
 
     visitIncrementDecrement(node: ts.UnaryExpression) {
-        if (node.parent && (node.parent.kind === ts.SyntaxKind.ExpressionStatement ||
-                            node.parent.kind === ts.SyntaxKind.ForStatement)) {
+        if (node.parent && (
+            // Can be a statement
+            node.parent.kind === ts.SyntaxKind.ExpressionStatement ||
+            // Can be directly in a for-statement
+            node.parent.kind === ts.SyntaxKind.ForStatement ||
+            // Can be in a comma operator in a for statement (`for (let a = 0, b = 10; a < b; a++, b--)`)
+            node.parent.kind === ts.SyntaxKind.BinaryExpression &&
+            (<ts.BinaryExpression>node.parent).operatorToken.kind === ts.SyntaxKind.CommaToken &&
+            node.parent.parent.kind === ts.SyntaxKind.ForStatement)) {
             return;
         }
         this.addFailure(this.createFailure(node.getStart(), node.getWidth(), Rule.POSTFIX_FAILURE_STRING));
diff --git a/src/services/breakpoints.ts b/src/services/breakpoints.ts
index 02456f5add1..12b127ffd2d 100644
--- a/src/services/breakpoints.ts
+++ b/src/services/breakpoints.ts
@@ -15,7 +15,7 @@ namespace ts.BreakpointResolver {
         }
 
         let tokenAtLocation = getTokenAtPosition(sourceFile, position);
-        let lineOfPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
+        const lineOfPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
         if (sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getStart(sourceFile)).line > lineOfPosition) {
             // Get previous token if the token is returned starts on new line
             // eg: let x =10; |--- cursor is here
@@ -216,7 +216,7 @@ namespace ts.BreakpointResolver {
                         return spanInNodeIfStartsOnSameLine(findPrecedingToken(node.pos, sourceFile));
 
                     case SyntaxKind.CommaToken:
-                        return spanInPreviousNode(node)
+                        return spanInPreviousNode(node);
 
                     case SyntaxKind.OpenBraceToken:
                         return spanInOpenBraceToken(node);
@@ -259,13 +259,13 @@ namespace ts.BreakpointResolver {
                         if (isArrayLiteralOrObjectLiteralDestructuringPattern(node)) {
                             return spanInArrayLiteralOrObjectLiteralDestructuringPattern(<DestructuringPattern>node);
                         }
-                        
+
                         // Set breakpoint on identifier element of destructuring pattern
                         // a or ...c  or d: x from 
                         // [a, b, ...c] or { a, b } or { d: x } from destructuring pattern
                         if ((node.kind === SyntaxKind.Identifier ||
-                            node.kind == SyntaxKind.SpreadElementExpression || 
-                            node.kind === SyntaxKind.PropertyAssignment || 
+                            node.kind == SyntaxKind.SpreadElementExpression ||
+                            node.kind === SyntaxKind.PropertyAssignment ||
                             node.kind === SyntaxKind.ShorthandPropertyAssignment) &&
                             isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
                             return textSpan(node);
@@ -325,14 +325,14 @@ namespace ts.BreakpointResolver {
                                     break;
                             }
                         }
-                        
+
                         // If this is name of property assignment, set breakpoint in the initializer
                         if (node.parent.kind === SyntaxKind.PropertyAssignment &&
-                            (<PropertyDeclaration>node.parent).name === node && 
+                            (<PropertyDeclaration>node.parent).name === node &&
                             !isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.parent)) {
                             return spanInNode((<PropertyDeclaration>node.parent).initializer);
                         }
-                        
+
                         // Breakpoint in type assertion goes to its operand
                         if (node.parent.kind === SyntaxKind.TypeAssertionExpression && (<TypeAssertion>node.parent).type === node) {
                             return spanInNextNode((<TypeAssertion>node.parent).type);
@@ -370,7 +370,7 @@ namespace ts.BreakpointResolver {
             }
 
             function textSpanFromVariableDeclaration(variableDeclaration: VariableDeclaration): TextSpan {
-                let declarations = variableDeclaration.parent.declarations;
+                const declarations = variableDeclaration.parent.declarations;
                 if (declarations && declarations[0] === variableDeclaration) {
                     // First declaration - include let keyword
                     return textSpan(findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent), variableDeclaration);
@@ -386,7 +386,7 @@ namespace ts.BreakpointResolver {
                 if (variableDeclaration.parent.parent.kind === SyntaxKind.ForInStatement) {
                     return spanInNode(variableDeclaration.parent.parent);
                 }
-                
+
                 // If this is a destructuring pattern, set breakpoint in binding pattern
                 if (isBindingPattern(variableDeclaration.name)) {
                     return spanInBindingPattern(<BindingPattern>variableDeclaration.name);
@@ -400,7 +400,7 @@ namespace ts.BreakpointResolver {
                     return textSpanFromVariableDeclaration(variableDeclaration);
                 }
 
-                let declarations = variableDeclaration.parent.declarations;
+                const declarations = variableDeclaration.parent.declarations;
                 if (declarations && declarations[0] !== variableDeclaration) {
                     // If we cannot set breakpoint on this declaration, set it on previous one
                     // Because the variable declaration may be binding pattern and 
@@ -425,8 +425,8 @@ namespace ts.BreakpointResolver {
                     return textSpan(parameter);
                 }
                 else {
-                    let functionDeclaration = <FunctionLikeDeclaration>parameter.parent;
-                    let indexOfParameter = indexOf(functionDeclaration.parameters, parameter);
+                    const functionDeclaration = <FunctionLikeDeclaration>parameter.parent;
+                    const indexOfParameter = indexOf(functionDeclaration.parameters, parameter);
                     if (indexOfParameter) {
                         // Not a first parameter, go to previous parameter
                         return spanInParameterDeclaration(functionDeclaration.parameters[indexOfParameter - 1]);
@@ -459,7 +459,7 @@ namespace ts.BreakpointResolver {
             }
 
             function spanInFunctionBlock(block: Block): TextSpan {
-                let nodeForSpanInBlock = block.statements.length ? block.statements[0] : block.getLastToken();
+                const nodeForSpanInBlock = block.statements.length ? block.statements[0] : block.getLastToken();
                 if (canFunctionHaveSpanInWholeDeclaration(<FunctionLikeDeclaration>block.parent)) {
                     return spanInNodeIfStartsOnSameLine(block.parent, nodeForSpanInBlock);
                 }
@@ -493,7 +493,7 @@ namespace ts.BreakpointResolver {
             function spanInInitializerOfForLike(forLikeStatement: ForStatement | ForOfStatement | ForInStatement): TextSpan {
                 if (forLikeStatement.initializer.kind === SyntaxKind.VariableDeclarationList) {
                     // Declaration list - set breakpoint in first declaration
-                    let variableDeclarationList = <VariableDeclarationList>forLikeStatement.initializer;
+                    const variableDeclarationList = <VariableDeclarationList>forLikeStatement.initializer;
                     if (variableDeclarationList.declarations.length > 0) {
                         return spanInNode(variableDeclarationList.declarations[0]);
                     }
@@ -519,7 +519,7 @@ namespace ts.BreakpointResolver {
 
             function spanInBindingPattern(bindingPattern: BindingPattern): TextSpan {
                 // Set breakpoint in first binding element
-                let firstBindingElement = forEach(bindingPattern.elements,
+                const firstBindingElement = forEach(bindingPattern.elements,
                     element => element.kind !== SyntaxKind.OmittedExpression ? element : undefined);
 
                 if (firstBindingElement) {
@@ -616,7 +616,7 @@ namespace ts.BreakpointResolver {
                     default:
                         if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
                             // Breakpoint in last binding element or binding pattern if it contains no elements
-                            let objectLiteral = <ObjectLiteralExpression>node.parent;
+                            const objectLiteral = <ObjectLiteralExpression>node.parent;
                             return textSpan(lastOrUndefined(objectLiteral.properties) || objectLiteral);
                         }
                         return spanInNode(node.parent);
@@ -633,7 +633,7 @@ namespace ts.BreakpointResolver {
                     default:
                         if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
                             // Breakpoint in last binding element or binding pattern if it contains no elements
-                            let arrayLiteral = <ArrayLiteralExpression>node.parent;
+                            const arrayLiteral = <ArrayLiteralExpression>node.parent;
                             return textSpan(lastOrUndefined(arrayLiteral.elements) || arrayLiteral);
                         }
 
@@ -686,7 +686,7 @@ namespace ts.BreakpointResolver {
             function spanInColonToken(node: Node): TextSpan {
                 // Is this : specifying return annotation of the function declaration
                 if (isFunctionLike(node.parent) ||
-                    node.parent.kind === SyntaxKind.PropertyAssignment || 
+                    node.parent.kind === SyntaxKind.PropertyAssignment ||
                     node.parent.kind === SyntaxKind.Parameter) {
                     return spanInPreviousNode(node);
                 }
diff --git a/src/services/formatting/formatting.ts b/src/services/formatting/formatting.ts
index 20b20356907..2f5f10752f4 100644
--- a/src/services/formatting/formatting.ts
+++ b/src/services/formatting/formatting.ts
@@ -26,8 +26,8 @@ namespace ts.formatting {
      * while(true)
      * { let x;
      * }
-     * Normally indentation is applied only to the first token in line so at glance 'var' should not be touched.
-     * However if some format rule adds new line between '}' and 'var' 'var' will become
+     * Normally indentation is applied only to the first token in line so at glance 'let' should not be touched.
+     * However if some format rule adds new line between '}' and 'let' 'let' will become
      * the first token in line so it should be indented
      */
     interface DynamicIndentation {
@@ -64,11 +64,11 @@ namespace ts.formatting {
 
     interface Indentation {
         indentation: number;
-        delta: number
+        delta: number;
     }
 
     export function formatOnEnter(position: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeOptions): TextChange[] {
-        let line = sourceFile.getLineAndCharacterOfPosition(position).line;
+        const line = sourceFile.getLineAndCharacterOfPosition(position).line;
         if (line === 0) {
             return [];
         }
@@ -81,12 +81,12 @@ namespace ts.formatting {
         while (isWhiteSpace(sourceFile.text.charCodeAt(endOfFormatSpan)) && !isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
             endOfFormatSpan--;
         }
-        let span = {
+        const span = {
             // get start position for the previous line
             pos: getStartPositionOfLine(line - 1, sourceFile),
             // end value is exclusive so add 1 to the result
             end: endOfFormatSpan + 1
-        }
+        };
         return formatSpan(span, sourceFile, options, rulesProvider, FormattingRequestKind.FormatOnEnter);
     }
 
@@ -99,7 +99,7 @@ namespace ts.formatting {
     }
 
     export function formatDocument(sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeOptions): TextChange[] {
-        let span = {
+        const span = {
             pos: 0,
             end: sourceFile.text.length
         };
@@ -108,7 +108,7 @@ namespace ts.formatting {
 
     export function formatSelection(start: number, end: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeOptions): TextChange[] {
         // format from the beginning of the line
-        let span = {
+        const span = {
             pos: getLineStartPositionForPosition(start, sourceFile),
             end: end
         };
@@ -116,11 +116,11 @@ namespace ts.formatting {
     }
 
     function formatOutermostParent(position: number, expectedLastToken: SyntaxKind, sourceFile: SourceFile, options: FormatCodeOptions, rulesProvider: RulesProvider, requestKind: FormattingRequestKind): TextChange[] {
-        let parent = findOutermostParent(position, expectedLastToken, sourceFile);
+        const parent = findOutermostParent(position, expectedLastToken, sourceFile);
         if (!parent) {
             return [];
         }
-        let span = {
+        const span = {
             pos: getLineStartPositionForPosition(parent.getStart(sourceFile), sourceFile),
             end: parent.end
         };
@@ -128,7 +128,7 @@ namespace ts.formatting {
     }
 
     function findOutermostParent(position: number, expectedTokenKind: SyntaxKind, sourceFile: SourceFile): Node {
-        let precedingToken = findPrecedingToken(position, sourceFile);
+        const precedingToken = findPrecedingToken(position, sourceFile);
 
         // when it is claimed that trigger character was typed at given position
         // we verify that there is a token with a matching kind whose end is equal to position (because the character was just typed).
@@ -168,7 +168,7 @@ namespace ts.formatting {
             case SyntaxKind.InterfaceDeclaration:
                 return rangeContainsRange((<InterfaceDeclaration>parent).members, node);
             case SyntaxKind.ModuleDeclaration:
-                let body = (<ModuleDeclaration>parent).body;
+                const body = (<ModuleDeclaration>parent).body;
                 return body && body.kind === SyntaxKind.Block && rangeContainsRange((<Block>body).statements, node);
             case SyntaxKind.SourceFile:
             case SyntaxKind.Block:
@@ -186,9 +186,9 @@ namespace ts.formatting {
         return find(sourceFile);
 
         function find(n: Node): Node {
-            let candidate = forEachChild(n, c => startEndContainsRange(c.getStart(sourceFile), c.end, range) && c);
+            const candidate = forEachChild(n, c => startEndContainsRange(c.getStart(sourceFile), c.end, range) && c);
             if (candidate) {
-                let result = find(candidate);
+                const result = find(candidate);
                 if (result) {
                     return result;
                 }
@@ -208,7 +208,7 @@ namespace ts.formatting {
         }
 
         // pick only errors that fall in range
-        let sorted = errors
+        const sorted = errors
             .filter(d => rangeOverlapsWithStartEnd(originalRange, d.start, d.start + d.length))
             .sort((e1, e2) => e1.start - e2.start);
 
@@ -227,7 +227,7 @@ namespace ts.formatting {
                     return false;
                 }
 
-                let error = sorted[index];
+                const error = sorted[index];
                 if (r.end <= error.start) {
                     // specified range ends before the error refered by 'index' - no error in range
                     return false;
@@ -253,12 +253,12 @@ namespace ts.formatting {
       * and return its end as start position for the scanner.
       */
     function getScanStartPosition(enclosingNode: Node, originalRange: TextRange, sourceFile: SourceFile): number {
-        let start = enclosingNode.getStart(sourceFile);
+        const start = enclosingNode.getStart(sourceFile);
         if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
             return start;
         }
 
-        let precedingToken = findPrecedingToken(originalRange.pos, sourceFile);
+        const precedingToken = findPrecedingToken(originalRange.pos, sourceFile);
         if (!precedingToken) {
             // no preceding token found - start from the beginning of enclosing node
             return enclosingNode.pos;
@@ -292,7 +292,7 @@ namespace ts.formatting {
         let previousLine = Constants.Unknown;
         let child: Node;
         while (n) {
-            let line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
+            const line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
             if (previousLine !== Constants.Unknown && line !== previousLine) {
                 break;
             }
@@ -314,17 +314,17 @@ namespace ts.formatting {
         rulesProvider: RulesProvider,
         requestKind: FormattingRequestKind): TextChange[] {
 
-        let rangeContainsError = prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange);
+        const rangeContainsError = prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange);
 
         // formatting context is used by rules provider
-        let formattingContext = new FormattingContext(sourceFile, requestKind);
+        const formattingContext = new FormattingContext(sourceFile, requestKind);
 
         // find the smallest node that fully wraps the range and compute the initial indentation for the node
-        let enclosingNode = findEnclosingNode(originalRange, sourceFile);
+        const enclosingNode = findEnclosingNode(originalRange, sourceFile);
 
-        let formattingScanner = getFormattingScanner(sourceFile, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end);
+        const formattingScanner = getFormattingScanner(sourceFile, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end);
 
-        let initialIndentation = SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options);
+        const initialIndentation = SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options);
 
         let previousRangeHasError: boolean;
         let previousRange: TextRangeWithKind;
@@ -334,23 +334,23 @@ namespace ts.formatting {
         let lastIndentedLine: number;
         let indentationOnLastIndentedLine: number;
 
-        let edits: TextChange[] = [];
+        const edits: TextChange[] = [];
 
         formattingScanner.advance();
 
         if (formattingScanner.isOnToken()) {
-            let startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
+            const startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
             let undecoratedStartLine = startLine;
             if (enclosingNode.decorators) {
                 undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
             }
 
-            let delta = getOwnOrInheritedDelta(enclosingNode, options, sourceFile);
+            const delta = getOwnOrInheritedDelta(enclosingNode, options, sourceFile);
             processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
         }
 
         if (!formattingScanner.isOnToken()) {
-            let leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
+            const leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
             if (leadingTrivia) {
                 processTrivia(leadingTrivia, enclosingNode, enclosingNode, undefined);
                 trimTrailingWhitespacesForRemainingRange();
@@ -384,11 +384,11 @@ namespace ts.formatting {
                 }
             }
             else {
-                let startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
-                let startLinePosition = getLineStartPositionForPosition(startPos, sourceFile);
-                let column = SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
+                const startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
+                const startLinePosition = getLineStartPositionForPosition(startPos, sourceFile);
+                const column = SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
                 if (startLine !== parentStartLine || startPos === column) {
-                    return column
+                    return column;
                 }
             }
 
@@ -404,7 +404,7 @@ namespace ts.formatting {
             effectiveParentStartLine: number): Indentation {
 
             let indentation = inheritedIndentation;
-            var delta = SmartIndenter.shouldIndentChildNode(node) ? options.IndentSize : 0;
+            let delta = SmartIndenter.shouldIndentChildNode(node) ? options.IndentSize : 0;
 
             if (effectiveParentStartLine === startLine) {
                 // if node is located on the same line with the parent
@@ -427,7 +427,7 @@ namespace ts.formatting {
             return {
                 indentation,
                 delta
-            }
+            };
         }
 
         function getFirstNonDecoratorTokenOfNode(node: Node) {
@@ -511,7 +511,7 @@ namespace ts.formatting {
                         }
                     }
                 }
-            }
+            };
 
             function getEffectiveDelta(delta: number, child: TextRangeWithKind) {
                 // Delta value should be zero when the node explicitly prevents indentation of the child node
@@ -524,7 +524,7 @@ namespace ts.formatting {
                 return;
             }
 
-            let nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
+            const nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
 
             // a useful observations when tracking context node
             //        /
@@ -545,7 +545,7 @@ namespace ts.formatting {
             forEachChild(
                 node,
                 child => {
-                    processChildNode(child, /*inheritedIndentation*/ Constants.Unknown, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListElement*/ false)
+                    processChildNode(child, /*inheritedIndentation*/ Constants.Unknown, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListItem*/ false);
                 },
                 (nodes: NodeArray<Node>) => {
                     processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
@@ -553,7 +553,7 @@ namespace ts.formatting {
 
             // proceed any tokens in the node that are located after child nodes
             while (formattingScanner.isOnToken()) {
-                let tokenInfo = formattingScanner.readTokenInfo(node);
+                const tokenInfo = formattingScanner.readTokenInfo(node);
                 if (tokenInfo.token.end > node.end) {
                     break;
                 }
@@ -570,9 +570,9 @@ namespace ts.formatting {
                 isListItem: boolean,
                 isFirstListItem?: boolean): number {
 
-                let childStartPos = child.getStart(sourceFile);
+                const childStartPos = child.getStart(sourceFile);
 
-                let childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
+                const childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
 
                 let undecoratedChildStartLine = childStartLine;
                 if (child.decorators) {
@@ -599,7 +599,7 @@ namespace ts.formatting {
 
                 while (formattingScanner.isOnToken()) {
                     // proceed any parent tokens that are located prior to child.getStart()
-                    let tokenInfo = formattingScanner.readTokenInfo(node);
+                    const tokenInfo = formattingScanner.readTokenInfo(node);
                     if (tokenInfo.token.end > childStartPos) {
                         // stop when formatting scanner advances past the beginning of the child
                         break;
@@ -614,14 +614,14 @@ namespace ts.formatting {
 
                 if (isToken(child)) {
                     // if child node is a token, it does not impact indentation, proceed it using parent indentation scope rules
-                    let tokenInfo = formattingScanner.readTokenInfo(child);
+                    const tokenInfo = formattingScanner.readTokenInfo(child);
                     Debug.assert(tokenInfo.token.end === child.end);
                     consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
                     return inheritedIndentation;
                 }
 
-                let effectiveParentStartLine = child.kind === SyntaxKind.Decorator ? childStartLine : undecoratedParentStartLine;
-                let childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
+                const effectiveParentStartLine = child.kind === SyntaxKind.Decorator ? childStartLine : undecoratedParentStartLine;
+                const childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
 
                 processNode(child, childContextNode, childStartLine, undecoratedChildStartLine, childIndentation.indentation, childIndentation.delta);
 
@@ -639,8 +639,8 @@ namespace ts.formatting {
                 parentStartLine: number,
                 parentDynamicIndentation: DynamicIndentation): void {
 
-                let listStartToken = getOpenTokenForList(parent, nodes);
-                let listEndToken = getCloseTokenForOpenToken(listStartToken);
+                const listStartToken = getOpenTokenForList(parent, nodes);
+                const listEndToken = getCloseTokenForOpenToken(listStartToken);
 
                 let listDynamicIndentation = parentDynamicIndentation;
                 let startLine = parentStartLine;
@@ -648,7 +648,7 @@ namespace ts.formatting {
                 if (listStartToken !== SyntaxKind.Unknown) {
                     // introduce a new indentation scope for lists (including list start and end tokens)
                     while (formattingScanner.isOnToken()) {
-                        let tokenInfo = formattingScanner.readTokenInfo(parent);
+                        const tokenInfo = formattingScanner.readTokenInfo(parent);
                         if (tokenInfo.token.end > nodes.pos) {
                             // stop when formatting scanner moves past the beginning of node list
                             break;
@@ -656,7 +656,7 @@ namespace ts.formatting {
                         else if (tokenInfo.token.kind === listStartToken) {
                             // consume list start token
                             startLine = sourceFile.getLineAndCharacterOfPosition(tokenInfo.token.pos).line;
-                            let indentation =
+                            const indentation =
                                 computeIndentation(tokenInfo.token, startLine, Constants.Unknown, parent, parentDynamicIndentation, parentStartLine);
 
                             listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation.indentation, indentation.delta);
@@ -672,12 +672,12 @@ namespace ts.formatting {
                 let inheritedIndentation = Constants.Unknown;
                 for (let i = 0; i < nodes.length; i++) {
                     const child = nodes[i];
-                    inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListElement*/ true, /*isFirstListItem*/ i === 0);
+                    inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListItem*/ true, /*isFirstListItem*/ i === 0);
                 }
 
                 if (listEndToken !== SyntaxKind.Unknown) {
                     if (formattingScanner.isOnToken()) {
-                        let tokenInfo = formattingScanner.readTokenInfo(parent);
+                        const tokenInfo = formattingScanner.readTokenInfo(parent);
                         // consume the list end token only if it is still belong to the parent
                         // there might be the case when current token matches end token but does not considered as one
                         // function (x: function) <--
@@ -693,7 +693,7 @@ namespace ts.formatting {
             function consumeTokenAndAdvanceScanner(currentTokenInfo: TokenInfo, parent: Node, dynamicIndentation: DynamicIndentation, container?: Node): void {
                 Debug.assert(rangeContainsRange(parent, currentTokenInfo.token));
 
-                let lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
+                const lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
                 let indentToken = false;
 
                 if (currentTokenInfo.leadingTrivia) {
@@ -701,13 +701,13 @@ namespace ts.formatting {
                 }
 
                 let lineAdded: boolean;
-                let isTokenInRange = rangeContainsRange(originalRange, currentTokenInfo.token);
+                const isTokenInRange = rangeContainsRange(originalRange, currentTokenInfo.token);
 
-                let tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
+                const tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
                 if (isTokenInRange) {
-                    let rangeHasError = rangeContainsError(currentTokenInfo.token);
+                    const rangeHasError = rangeContainsError(currentTokenInfo.token);
                     // save previousRange since processRange will overwrite this value with current one
-                    let savePreviousRange = previousRange;
+                    const savePreviousRange = previousRange;
                     lineAdded = processRange(currentTokenInfo.token, tokenStart, parent, childContextNode, dynamicIndentation);
                     if (rangeHasError) {
                         // do not indent comments\token if token range overlaps with some error
@@ -730,15 +730,15 @@ namespace ts.formatting {
                 }
 
                 if (indentToken) {
-                    let tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
+                    const tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
                         dynamicIndentation.getIndentationForToken(tokenStart.line, currentTokenInfo.token.kind, container) :
                         Constants.Unknown;
 
                     let indentNextTokenOrTrivia = true;
                     if (currentTokenInfo.leadingTrivia) {
-                        let commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
+                        const commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
 
-                        for (let triviaItem of currentTokenInfo.leadingTrivia) {
+                        for (const triviaItem of currentTokenInfo.leadingTrivia) {
                             const triviaInRange = rangeContainsRange(originalRange, triviaItem);
                             switch (triviaItem.kind) {
                                 case SyntaxKind.MultiLineCommentTrivia:
@@ -776,9 +776,9 @@ namespace ts.formatting {
         }
 
         function processTrivia(trivia: TextRangeWithKind[], parent: Node, contextNode: Node, dynamicIndentation: DynamicIndentation): void {
-            for (let triviaItem of trivia) {
+            for (const triviaItem of trivia) {
                 if (isComment(triviaItem.kind) && rangeContainsRange(originalRange, triviaItem)) {
-                    let triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
+                    const triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
                     processRange(triviaItem, triviaItemStart, parent, contextNode, dynamicIndentation);
                 }
             }
@@ -790,17 +790,17 @@ namespace ts.formatting {
             contextNode: Node,
             dynamicIndentation: DynamicIndentation): boolean {
 
-            let rangeHasError = rangeContainsError(range);
+            const rangeHasError = rangeContainsError(range);
             let lineAdded: boolean;
             if (!rangeHasError && !previousRangeHasError) {
                 if (!previousRange) {
                     // trim whitespaces starting from the beginning of the span up to the current line
-                    let originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
+                    const originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
                     trimTrailingWhitespacesForLines(originalStart.line, rangeStart.line);
                 }
                 else {
                     lineAdded =
-                        processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation)
+                        processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation);
                 }
             }
 
@@ -823,7 +823,7 @@ namespace ts.formatting {
 
             formattingContext.updateContext(previousItem, previousParent, currentItem, currentParent, contextNode);
 
-            let rule = rulesProvider.getRulesMap().GetRule(formattingContext);
+            const rule = rulesProvider.getRulesMap().GetRule(formattingContext);
 
             let trimTrailingWhitespaces: boolean;
             let lineAdded: boolean;
@@ -835,7 +835,7 @@ namespace ts.formatting {
                     // Handle the case where the next line is moved to be the end of this line.
                     // In this case we don't indent the next line in the next pass.
                     if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                        dynamicIndentation.recomputeIndentation(/*lineAdded*/ false);
+                        dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ false);
                     }
                 }
                 else if (rule.Operation.Action & RuleAction.NewLine && currentStartLine === previousStartLine) {
@@ -844,7 +844,7 @@ namespace ts.formatting {
                     // In this case we indent token2 in the next pass but we set
                     // sameLineIndent flag to notify the indenter that the indentation is within the line.
                     if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                        dynamicIndentation.recomputeIndentation(/*lineAdded*/ true);
+                        dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ true);
                     }
                 }
 
@@ -864,15 +864,15 @@ namespace ts.formatting {
         }
 
         function insertIndentation(pos: number, indentation: number, lineAdded: boolean): void {
-            let indentationString = getIndentationString(indentation, options);
+            const indentationString = getIndentationString(indentation, options);
             if (lineAdded) {
                 // new line is added before the token by the formatting rules
                 // insert indentation string at the very beginning of the token
                 recordReplace(pos, 0, indentationString);
             }
             else {
-                let tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
-                let startLinePosition = getStartPositionOfLine(tokenStart.line, sourceFile);
+                const tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
+                const startLinePosition = getStartPositionOfLine(tokenStart.line, sourceFile);
                 if (indentation !== tokenStart.character || indentationIsDifferent(indentationString, startLinePosition)) {
                     recordReplace(startLinePosition, tokenStart.character, indentationString);
                 }
@@ -886,7 +886,7 @@ namespace ts.formatting {
         function indentMultilineComment(commentRange: TextRange, indentation: number, firstLineIsIndented: boolean) {
             // split comment in lines
             let startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
-            let endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
+            const endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
             let parts: TextRange[];
             if (startLine === endLine) {
                 if (!firstLineIsIndented) {
@@ -898,8 +898,8 @@ namespace ts.formatting {
             else {
                 parts = [];
                 let startPos = commentRange.pos;
-                for (let line = startLine; line < endLine; ++line) {
-                    let endOfLine = getEndLinePosition(line, sourceFile);
+                for (let line = startLine; line < endLine; line++) {
+                    const endOfLine = getEndLinePosition(line, sourceFile);
                     parts.push({ pos: startPos, end: endOfLine });
                     startPos = getStartPositionOfLine(line + 1, sourceFile);
                 }
@@ -907,9 +907,9 @@ namespace ts.formatting {
                 parts.push({ pos: startPos, end: commentRange.end });
             }
 
-            let startLinePos = getStartPositionOfLine(startLine, sourceFile);
+            const startLinePos = getStartPositionOfLine(startLine, sourceFile);
 
-            let nonWhitespaceColumnInFirstPart =
+            const nonWhitespaceColumnInFirstPart =
                 SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(startLinePos, parts[0].pos, sourceFile, options);
 
             if (indentation === nonWhitespaceColumnInFirstPart.column) {
@@ -923,17 +923,17 @@ namespace ts.formatting {
             }
 
             // shift all parts on the delta size
-            let delta = indentation - nonWhitespaceColumnInFirstPart.column;
-            for (let i = startIndex, len = parts.length; i < len; ++i, ++startLine) {
-                let startLinePos = getStartPositionOfLine(startLine, sourceFile);
-                let nonWhitespaceCharacterAndColumn =
+            const delta = indentation - nonWhitespaceColumnInFirstPart.column;
+            for (let i = startIndex, len = parts.length; i < len; i++, startLine++) {
+                const startLinePos = getStartPositionOfLine(startLine, sourceFile);
+                const nonWhitespaceCharacterAndColumn =
                     i === 0
                         ? nonWhitespaceColumnInFirstPart
                         : SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(parts[i].pos, parts[i].end, sourceFile, options);
 
-                let newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
+                const newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
                 if (newIndentation > 0) {
-                    let indentationString = getIndentationString(newIndentation, options);
+                    const indentationString = getIndentationString(newIndentation, options);
                     recordReplace(startLinePos, nonWhitespaceCharacterAndColumn.character, indentationString);
                 }
                 else {
@@ -943,16 +943,16 @@ namespace ts.formatting {
         }
 
         function trimTrailingWhitespacesForLines(line1: number, line2: number, range?: TextRangeWithKind) {
-            for (let line = line1; line < line2; ++line) {
-                let lineStartPosition = getStartPositionOfLine(line, sourceFile);
-                let lineEndPosition = getEndLinePosition(line, sourceFile);
+            for (let line = line1; line < line2; line++) {
+                const lineStartPosition = getStartPositionOfLine(line, sourceFile);
+                const lineEndPosition = getEndLinePosition(line, sourceFile);
 
                 // do not trim whitespaces in comments or template expression
                 if (range && (isComment(range.kind) || isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
                     continue;
                 }
 
-                let whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
+                const whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
                 if (whitespaceStart !== -1) {
                     Debug.assert(whitespaceStart === lineStartPosition || !isWhiteSpace(sourceFile.text.charCodeAt(whitespaceStart - 1)));
                     recordDelete(whitespaceStart, lineEndPosition + 1 - whitespaceStart);
@@ -979,16 +979,16 @@ namespace ts.formatting {
          * Trimming will be done for lines after the previous range
          */
         function trimTrailingWhitespacesForRemainingRange() {
-            let startPosition = previousRange ? previousRange.end : originalRange.pos;
+            const startPosition = previousRange ? previousRange.end : originalRange.pos;
 
-            let startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
-            let endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
+            const startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
+            const endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
 
             trimTrailingWhitespacesForLines(startLine, endLine + 1, previousRange);
         }
 
         function newTextChange(start: number, len: number, newText: string): TextChange {
-            return { span: createTextSpan(start, len), newText }
+            return { span: createTextSpan(start, len), newText };
         }
 
         function recordDelete(start: number, len: number) {
@@ -1009,7 +1009,6 @@ namespace ts.formatting {
             currentRange: TextRangeWithKind,
             currentStartLine: number): void {
 
-            let between: TextRange;
             switch (rule.Operation.Action) {
                 case RuleAction.Ignore:
                     // no action required
@@ -1029,7 +1028,7 @@ namespace ts.formatting {
                     }
 
                     // edit should not be applied only if we have one line feed between elements
-                    let lineDelta = currentStartLine - previousStartLine;
+                    const lineDelta = currentStartLine - previousStartLine;
                     if (lineDelta !== 1) {
                         recordReplace(previousRange.end, currentRange.pos - previousRange.end, options.NewLineCharacter);
                     }
@@ -1040,7 +1039,7 @@ namespace ts.formatting {
                         return;
                     }
 
-                    let posDelta = currentRange.pos - previousRange.end;
+                    const posDelta = currentRange.pos - previousRange.end;
                     if (posDelta !== 1 || sourceFile.text.charCodeAt(previousRange.end) !== CharacterCodes.space) {
                         recordReplace(previousRange.end, currentRange.pos - previousRange.end, " ");
                     }
@@ -1049,15 +1048,6 @@ namespace ts.formatting {
         }
     }
 
-    function isSomeBlock(kind: SyntaxKind): boolean {
-        switch (kind) {
-            case SyntaxKind.Block:
-            case SyntaxKind.ModuleBlock:
-                return true;
-        }
-        return false;
-    }
-
     function getOpenTokenForList(node: Node, list: Node[]) {
         switch (node.kind) {
             case SyntaxKind.Constructor:
@@ -1102,13 +1092,13 @@ namespace ts.formatting {
         return SyntaxKind.Unknown;
     }
 
-    var internedSizes: { tabSize: number; indentSize: number };
-    var internedTabsIndentation: string[];
-    var internedSpacesIndentation: string[];
+    let internedSizes: { tabSize: number; indentSize: number };
+    let internedTabsIndentation: string[];
+    let internedSpacesIndentation: string[];
 
     export function getIndentationString(indentation: number, options: FormatCodeOptions): string {
         // reset interned strings if FormatCodeOptions were changed
-        let resetInternedStrings =
+        const resetInternedStrings =
             !internedSizes || (internedSizes.tabSize !== options.TabSize || internedSizes.indentSize !== options.IndentSize);
 
         if (resetInternedStrings) {
@@ -1117,8 +1107,8 @@ namespace ts.formatting {
         }
 
         if (!options.ConvertTabsToSpaces) {
-            let tabs = Math.floor(indentation / options.TabSize);
-            let spaces = indentation - tabs * options.TabSize;
+            const tabs = Math.floor(indentation / options.TabSize);
+            const spaces = indentation - tabs * options.TabSize;
 
             let tabString: string;
             if (!internedTabsIndentation) {
@@ -1126,7 +1116,7 @@ namespace ts.formatting {
             }
 
             if (internedTabsIndentation[tabs] === undefined) {
-                internedTabsIndentation[tabs] = tabString = repeat('\t', tabs);
+                internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
             }
             else {
                 tabString = internedTabsIndentation[tabs];
@@ -1136,8 +1126,8 @@ namespace ts.formatting {
         }
         else {
             let spacesString: string;
-            let quotient = Math.floor(indentation / options.IndentSize);
-            let remainder = indentation % options.IndentSize;
+            const quotient = Math.floor(indentation / options.IndentSize);
+            const remainder = indentation % options.IndentSize;
             if (!internedSpacesIndentation) {
                 internedSpacesIndentation = [];
             }
@@ -1155,7 +1145,7 @@ namespace ts.formatting {
 
         function repeat(value: string, count: number): string {
             let s = "";
-            for (let i = 0; i < count; ++i) {
+            for (let i = 0; i < count; i++) {
                 s += value;
             }
 
diff --git a/src/services/formatting/formattingContext.ts b/src/services/formatting/formattingContext.ts
index ab182797a3c..bd5ca352476 100644
--- a/src/services/formatting/formattingContext.ts
+++ b/src/services/formatting/formattingContext.ts
@@ -57,8 +57,8 @@ namespace ts.formatting {
 
         public TokensAreOnSameLine(): boolean {
             if (this.tokensAreOnSameLine === undefined) {
-                let startLine = this.sourceFile.getLineAndCharacterOfPosition(this.currentTokenSpan.pos).line;
-                let endLine = this.sourceFile.getLineAndCharacterOfPosition(this.nextTokenSpan.pos).line;
+                const startLine = this.sourceFile.getLineAndCharacterOfPosition(this.currentTokenSpan.pos).line;
+                const endLine = this.sourceFile.getLineAndCharacterOfPosition(this.nextTokenSpan.pos).line;
                 this.tokensAreOnSameLine = (startLine === endLine);
             }
 
@@ -82,17 +82,17 @@ namespace ts.formatting {
         }
 
         private NodeIsOnOneLine(node: Node): boolean {
-            let startLine = this.sourceFile.getLineAndCharacterOfPosition(node.getStart(this.sourceFile)).line;
-            let endLine = this.sourceFile.getLineAndCharacterOfPosition(node.getEnd()).line;
+            const startLine = this.sourceFile.getLineAndCharacterOfPosition(node.getStart(this.sourceFile)).line;
+            const endLine = this.sourceFile.getLineAndCharacterOfPosition(node.getEnd()).line;
             return startLine === endLine;
         }
 
         private BlockIsOnOneLine(node: Node): boolean {
-            let openBrace = findChildOfKind(node, SyntaxKind.OpenBraceToken, this.sourceFile);
-            let closeBrace = findChildOfKind(node, SyntaxKind.CloseBraceToken, this.sourceFile);
+            const openBrace = findChildOfKind(node, SyntaxKind.OpenBraceToken, this.sourceFile);
+            const closeBrace = findChildOfKind(node, SyntaxKind.CloseBraceToken, this.sourceFile);
             if (openBrace && closeBrace) {
-                let startLine = this.sourceFile.getLineAndCharacterOfPosition(openBrace.getEnd()).line;
-                let endLine = this.sourceFile.getLineAndCharacterOfPosition(closeBrace.getStart(this.sourceFile)).line;
+                const startLine = this.sourceFile.getLineAndCharacterOfPosition(openBrace.getEnd()).line;
+                const endLine = this.sourceFile.getLineAndCharacterOfPosition(closeBrace.getStart(this.sourceFile)).line;
                 return startLine === endLine;
             }
             return false;
diff --git a/src/services/formatting/formattingScanner.ts b/src/services/formatting/formattingScanner.ts
index 5b869f12096..ff003e08007 100644
--- a/src/services/formatting/formattingScanner.ts
+++ b/src/services/formatting/formattingScanner.ts
@@ -35,7 +35,7 @@ namespace ts.formatting {
         scanner.setText(sourceFile.text);
         scanner.setTextPos(startPos);
 
-        let wasNewLine: boolean = true;
+        let wasNewLine = true;
         let leadingTrivia: TextRangeWithKind[];
         let trailingTrivia: TextRangeWithKind[];
 
@@ -56,13 +56,13 @@ namespace ts.formatting {
                 scanner.setText(undefined);
                 scanner = undefined;
             }
-        }
+        };
 
         function advance(): void {
             Debug.assert(scanner !== undefined);
 
             lastTokenInfo = undefined;
-            let isStarted = scanner.getStartPos() !== startPos;
+            const isStarted = scanner.getStartPos() !== startPos;
 
             if (isStarted) {
                 if (trailingTrivia) {
@@ -81,23 +81,22 @@ namespace ts.formatting {
                 scanner.scan();
             }
 
-            let t: SyntaxKind;
             let pos = scanner.getStartPos();
 
             // Read leading trivia and token
             while (pos < endPos) {
-                let t = scanner.getToken();
+                const t = scanner.getToken();
                 if (!isTrivia(t)) {
                     break;
                 }
 
                 // consume leading trivia
                 scanner.scan();
-                let item = {
+                const item = {
                     pos: pos,
                     end: scanner.getStartPos(),
                     kind: t
-                }
+                };
 
                 pos = scanner.getStartPos();
 
@@ -166,16 +165,16 @@ namespace ts.formatting {
 
             // normally scanner returns the smallest available token
             // check the kind of context node to determine if scanner should have more greedy behavior and consume more text.
-            let expectedScanAction =
+            const expectedScanAction =
                 shouldRescanGreaterThanToken(n)
                 ? ScanAction.RescanGreaterThanToken
-                : shouldRescanSlashToken(n) 
-                    ? ScanAction.RescanSlashToken 
+                : shouldRescanSlashToken(n)
+                    ? ScanAction.RescanSlashToken
                     : shouldRescanTemplateToken(n)
                         ? ScanAction.RescanTemplateToken
                         : shouldRescanJsxIdentifier(n)
-                            ? ScanAction.RescanJsxIdentifier 
-                            : ScanAction.Scan
+                            ? ScanAction.RescanJsxIdentifier
+                            : ScanAction.Scan;
 
             if (lastTokenInfo && expectedScanAction === lastScanAction) {
                 // readTokenInfo was called before with the same expected scan action.
@@ -218,11 +217,11 @@ namespace ts.formatting {
                 lastScanAction = ScanAction.Scan;
             }
 
-            let token: TextRangeWithKind = {
+            const token: TextRangeWithKind = {
                 pos: scanner.getStartPos(),
                 end: scanner.getTextPos(),
                 kind: currentToken
-            }
+            };
 
             // consume trailing trivia
             if (trailingTrivia) {
@@ -233,7 +232,7 @@ namespace ts.formatting {
                 if (!isTrivia(currentToken)) {
                     break;
                 }
-                let trivia = {
+                const trivia = {
                     pos: scanner.getStartPos(),
                     end: scanner.getTextPos(),
                     kind: currentToken
@@ -256,7 +255,7 @@ namespace ts.formatting {
                 leadingTrivia: leadingTrivia,
                 trailingTrivia: trailingTrivia,
                 token: token
-            }
+            };
 
             return fixTokenKind(lastTokenInfo, n);
         }
@@ -264,8 +263,8 @@ namespace ts.formatting {
         function isOnToken(): boolean {
             Debug.assert(scanner !== undefined);
 
-            let current = (lastTokenInfo && lastTokenInfo.token.kind) || scanner.getToken();
-            let startPos = (lastTokenInfo && lastTokenInfo.token.pos) || scanner.getStartPos();
+            const current = (lastTokenInfo && lastTokenInfo.token.kind) || scanner.getToken();
+            const startPos = (lastTokenInfo && lastTokenInfo.token.pos) || scanner.getStartPos();
             return startPos < endPos && current !== SyntaxKind.EndOfFileToken && !isTrivia(current);
         }
 
diff --git a/src/services/formatting/ruleOperation.ts b/src/services/formatting/ruleOperation.ts
index e897513bd27..9c35b80bcfe 100644
--- a/src/services/formatting/ruleOperation.ts
+++ b/src/services/formatting/ruleOperation.ts
@@ -1,4 +1,5 @@
 ///<reference path='references.ts' />
+/* tslint:disable:no-null-keyword */
 
 /* @internal */
 namespace ts.formatting {
@@ -17,11 +18,11 @@ namespace ts.formatting {
         }
 
         static create1(action: RuleAction) {
-            return RuleOperation.create2(RuleOperationContext.Any, action)
+            return RuleOperation.create2(RuleOperationContext.Any, action);
         }
 
         static create2(context: RuleOperationContext, action: RuleAction) {
-            let result = new RuleOperation();
+            const result = new RuleOperation();
             result.Context = context;
             result.Action = action;
             return result;
diff --git a/src/services/formatting/ruleOperationContext.ts b/src/services/formatting/ruleOperationContext.ts
index 47330faa0dd..6c368dcc617 100644
--- a/src/services/formatting/ruleOperationContext.ts
+++ b/src/services/formatting/ruleOperationContext.ts
@@ -5,7 +5,7 @@ namespace ts.formatting {
 
     export class RuleOperationContext {
         private customContextChecks: { (context: FormattingContext): boolean; }[];
-        
+
         constructor(...funcs: { (context: FormattingContext): boolean; }[]) {
             this.customContextChecks = funcs;
         }
@@ -22,7 +22,7 @@ namespace ts.formatting {
                 return true;
             }
 
-            for (let check of this.customContextChecks) {
+            for (const check of this.customContextChecks) {
                 if (!check(context)) {
                     return false;
                 }
diff --git a/src/services/formatting/rules.ts b/src/services/formatting/rules.ts
index afcaad28560..47a204a5b7e 100644
--- a/src/services/formatting/rules.ts
+++ b/src/services/formatting/rules.ts
@@ -4,8 +4,8 @@
 namespace ts.formatting {
     export class Rules {
         public getRuleName(rule: Rule) {
-            let o: ts.Map<any> = <any>this;
-            for (let name in o) {
+            const o: ts.Map<any> = <any>this;
+            for (const name in o) {
                 if (o[name] === rule) {
                     return name;
                 }
@@ -166,7 +166,7 @@ namespace ts.formatting {
         public NoSpaceAfterKeywordInControl: Rule;
 
         // Open Brace braces after function
-        //TypeScript: Function can have return types, which can be made of tons of different token kinds
+        // TypeScript: Function can have return types, which can be made of tons of different token kinds
         public FunctionOpenBraceLeftTokenRange: Shared.TokenRange;
         public SpaceBeforeOpenBraceInFunction: Rule;
         public NewLineBeforeOpenBraceInFunction: Rule;
@@ -313,7 +313,7 @@ namespace ts.formatting {
             this.SpaceAfterVoidOperator = new Rule(RuleDescriptor.create3(SyntaxKind.VoidKeyword, Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), RuleAction.Space));
 
             this.NoSpaceBetweenReturnAndSemicolon = new Rule(RuleDescriptor.create1(SyntaxKind.ReturnKeyword, SyntaxKind.SemicolonToken), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), RuleAction.Delete));
-            
+
             // Add a space between statements. All keywords except (do,else,case) has open/close parens after them.
             // So, we have a rule to add a space for [),Any], [do,Any], [else,Any], and [case,Any]
             this.SpaceBetweenStatements = new Rule(RuleDescriptor.create4(Shared.TokenRange.FromTokens([SyntaxKind.CloseParenToken, SyntaxKind.DoKeyword, SyntaxKind.ElseKeyword, SyntaxKind.CaseKeyword]), Shared.TokenRange.Any), RuleOperation.create2(new RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotForContext), RuleAction.Space));
@@ -458,7 +458,7 @@ namespace ts.formatting {
             this.NoSpaceAfterKeywordInControl = new Rule(RuleDescriptor.create2(Shared.TokenRange.Keywords, SyntaxKind.OpenParenToken), RuleOperation.create2(new RuleOperationContext(Rules.IsControlDeclContext), RuleAction.Delete));
 
             // Open Brace braces after function
-            //TypeScript: Function can have return types, which can be made of tons of different token kinds
+            // TypeScript: Function can have return types, which can be made of tons of different token kinds
             this.NewLineBeforeOpenBraceInFunction = new Rule(RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, SyntaxKind.OpenBraceToken), RuleOperation.create2(new RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), RuleAction.NewLine), RuleFlags.CanDeleteNewLines);
 
             // Open Brace braces after TypeScript module/class/interface
@@ -616,17 +616,17 @@ namespace ts.formatting {
                 case SyntaxKind.FunctionDeclaration:
                 case SyntaxKind.MethodDeclaration:
                 case SyntaxKind.MethodSignature:
-                //case SyntaxKind.MemberFunctionDeclaration:
+                // case SyntaxKind.MemberFunctionDeclaration:
                 case SyntaxKind.GetAccessor:
                 case SyntaxKind.SetAccessor:
-                ///case SyntaxKind.MethodSignature:
+                // case SyntaxKind.MethodSignature:
                 case SyntaxKind.CallSignature:
                 case SyntaxKind.FunctionExpression:
                 case SyntaxKind.Constructor:
                 case SyntaxKind.ArrowFunction:
-                //case SyntaxKind.ConstructorDeclaration:
-                //case SyntaxKind.SimpleArrowFunctionExpression:
-                //case SyntaxKind.ParenthesizedArrowFunctionExpression:
+                // case SyntaxKind.ConstructorDeclaration:
+                // case SyntaxKind.SimpleArrowFunctionExpression:
+                // case SyntaxKind.ParenthesizedArrowFunctionExpression:
                 case SyntaxKind.InterfaceDeclaration: // This one is not truly a function, but for formatting purposes, it acts just like one
                     return true;
             }
@@ -724,7 +724,7 @@ namespace ts.formatting {
         }
 
         static IsNotBeforeBlockInFunctionDeclarationContext(context: FormattingContext): boolean {
-            return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context)
+            return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context);
         }
 
         static IsEndOfDecoratorContextOnSameLine(context: FormattingContext): boolean {
@@ -755,7 +755,7 @@ namespace ts.formatting {
         }
 
         static IsObjectTypeContext(context: FormattingContext): boolean {
-            return context.contextNode.kind === SyntaxKind.TypeLiteral;// && context.contextNode.parent.kind !== SyntaxKind.InterfaceDeclaration;
+            return context.contextNode.kind === SyntaxKind.TypeLiteral; // && context.contextNode.parent.kind !== SyntaxKind.InterfaceDeclaration;
         }
 
         static IsTypeArgumentOrParameterOrAssertion(token: TextRangeWithKind, parent: Node): boolean {
diff --git a/src/services/formatting/rulesMap.ts b/src/services/formatting/rulesMap.ts
index bffbb75c02e..74a1a33b7de 100644
--- a/src/services/formatting/rulesMap.ts
+++ b/src/services/formatting/rulesMap.ts
@@ -1,4 +1,5 @@
 ///<reference path='references.ts' />
+/* tslint:disable:no-null-keyword */
 
 /* @internal */
 namespace ts.formatting {
@@ -12,17 +13,17 @@ namespace ts.formatting {
         }
 
         static create(rules: Rule[]): RulesMap {
-            let result = new RulesMap();
+            const result = new RulesMap();
             result.Initialize(rules);
             return result;
         }
 
         public Initialize(rules: Rule[]) {
             this.mapRowLength = SyntaxKind.LastToken + 1;
-            this.map = <any> new Array(this.mapRowLength * this.mapRowLength);//new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
+            this.map = <any> new Array(this.mapRowLength * this.mapRowLength); // new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
 
             // This array is used only during construction of the rulesbucket in the map
-            let rulesBucketConstructionStateList: RulesBucketConstructionState[] = <any> new Array(this.map.length);//new Array<RulesBucketConstructionState>(this.map.length);
+            const rulesBucketConstructionStateList: RulesBucketConstructionState[] = <any>new Array(this.map.length); // new Array<RulesBucketConstructionState>(this.map.length);
 
             this.FillRules(rules, rulesBucketConstructionStateList);
             return this.map;
@@ -35,18 +36,18 @@ namespace ts.formatting {
         }
 
         private GetRuleBucketIndex(row: number, column: number): number {
-            let rulesBucketIndex = (row * this.mapRowLength) + column;
-            //Debug.Assert(rulesBucketIndex < this.map.Length, "Trying to access an index outside the array.");
+            const rulesBucketIndex = (row * this.mapRowLength) + column;
+            // Debug.Assert(rulesBucketIndex < this.map.Length, "Trying to access an index outside the array.");
             return rulesBucketIndex;
         }
 
         private FillRule(rule: Rule, rulesBucketConstructionStateList: RulesBucketConstructionState[]): void {
-            let specificRule = rule.Descriptor.LeftTokenRange !== Shared.TokenRange.Any &&
+            const specificRule = rule.Descriptor.LeftTokenRange !== Shared.TokenRange.Any &&
                                rule.Descriptor.RightTokenRange !== Shared.TokenRange.Any;
 
             rule.Descriptor.LeftTokenRange.GetTokens().forEach((left) => {
                 rule.Descriptor.RightTokenRange.GetTokens().forEach((right) => {
-                    let rulesBucketIndex = this.GetRuleBucketIndex(left, right);
+                    const rulesBucketIndex = this.GetRuleBucketIndex(left, right);
 
                     let rulesBucket = this.map[rulesBucketIndex];
                     if (rulesBucket === undefined) {
@@ -54,15 +55,15 @@ namespace ts.formatting {
                     }
 
                     rulesBucket.AddRule(rule, specificRule, rulesBucketConstructionStateList, rulesBucketIndex);
-                })
-            })
+                });
+            });
         }
 
         public GetRule(context: FormattingContext): Rule {
-            let bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
-            let bucket = this.map[bucketIndex];
+            const bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
+            const bucket = this.map[bucketIndex];
             if (bucket != null) {
-                for (let rule of bucket.Rules()) {
+                for (const rule of bucket.Rules()) {
                     if (rule.Operation.Context.InContext(context)) {
                         return rule;
                     }
@@ -72,8 +73,8 @@ namespace ts.formatting {
         }
     }
 
-    let MaskBitSize = 5;
-    let Mask = 0x1f;
+    const MaskBitSize = 5;
+    const Mask = 0x1f;
 
     export enum RulesPosition {
         IgnoreRulesSpecific = 0,
@@ -167,7 +168,7 @@ namespace ts.formatting {
             if (state === undefined) {
                 state = constructionState[rulesBucketIndex] = new RulesBucketConstructionState();
             }
-            let index = state.GetInsertionIndex(position);
+            const index = state.GetInsertionIndex(position);
             this.rules.splice(index, 0, rule);
             state.IncreaseInsertionIndex(position);
         }
diff --git a/src/services/formatting/rulesProvider.ts b/src/services/formatting/rulesProvider.ts
index 48a783dd0c6..19581173f2d 100644
--- a/src/services/formatting/rulesProvider.ts
+++ b/src/services/formatting/rulesProvider.ts
@@ -1,4 +1,5 @@
 /// <reference path="references.ts"/>
+/* tslint:disable:no-null-keyword */
 
 /* @internal */
 namespace ts.formatting {
@@ -27,8 +28,8 @@ namespace ts.formatting {
         public ensureUpToDate(options: ts.FormatCodeOptions) {
             // TODO: Should this be '==='?
             if (this.options == null || !ts.compareDataObjects(this.options, options)) {
-                let activeRules = this.createActiveRules(options);
-                let rulesMap = RulesMap.create(activeRules);
+                const activeRules = this.createActiveRules(options);
+                const rulesMap = RulesMap.create(activeRules);
 
                 this.activeRules = activeRules;
                 this.rulesMap = rulesMap;
diff --git a/src/services/formatting/smartIndenter.ts b/src/services/formatting/smartIndenter.ts
index 8e0fef884e7..23a1d937869 100644
--- a/src/services/formatting/smartIndenter.ts
+++ b/src/services/formatting/smartIndenter.ts
@@ -2,7 +2,7 @@
 
 /* @internal */
 namespace ts.formatting {
-    export module SmartIndenter {
+    export namespace SmartIndenter {
 
         const enum Value {
             Unknown = -1
@@ -19,18 +19,18 @@ namespace ts.formatting {
                 return 0;
             }
 
-            let precedingToken = findPrecedingToken(position, sourceFile);
+            const precedingToken = findPrecedingToken(position, sourceFile);
             if (!precedingToken) {
                 return 0;
             }
 
             // no indentation in string \regex\template literals
-            let precedingTokenIsLiteral = isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
+            const precedingTokenIsLiteral = isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
             if (precedingTokenIsLiteral && precedingToken.getStart(sourceFile) <= position && precedingToken.end > position) {
                 return 0;
             }
 
-            let lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
+            const lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
 
             // indentation is first non-whitespace character in a previous line
             // for block indentation, we should look for a line which contains something that's not
@@ -40,21 +40,21 @@ namespace ts.formatting {
                 // move backwards until we find a line with a non-whitespace character,
                 // then find the first non-whitespace character for that line.
                 let current = position;
-                while (current > 0){
-                    let char = sourceFile.text.charCodeAt(current);
+                while (current > 0) {
+                    const char = sourceFile.text.charCodeAt(current);
                     if (!isWhiteSpace(char) && !isLineBreak(char)) {
                         break;
                     }
                     current--;
                 }
 
-                let lineStart = ts.getLineStartPositionForPosition(current, sourceFile);
+                const lineStart = ts.getLineStartPositionForPosition(current, sourceFile);
                 return SmartIndenter.findFirstNonWhitespaceColumn(lineStart, current, sourceFile, options);
             }
 
             if (precedingToken.kind === SyntaxKind.CommaToken && precedingToken.parent.kind !== SyntaxKind.BinaryExpression) {
                 // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
-                let actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
+                const actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
                 if (actualIndentation !== Value.Unknown) {
                     return actualIndentation;
                 }
@@ -104,7 +104,7 @@ namespace ts.formatting {
         }
 
         export function getIndentationForNode(n: Node, ignoreActualIndentationRange: TextRange, sourceFile: SourceFile, options: FormatCodeOptions): number {
-            let start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+            const start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
             return getIndentationForNodeWorker(n, start, ignoreActualIndentationRange, /*indentationDelta*/ 0, sourceFile, options);
         }
 
@@ -124,19 +124,19 @@ namespace ts.formatting {
             while (parent) {
                 let useActualIndentation = true;
                 if (ignoreActualIndentationRange) {
-                    let start = current.getStart(sourceFile);
+                    const start = current.getStart(sourceFile);
                     useActualIndentation = start < ignoreActualIndentationRange.pos || start > ignoreActualIndentationRange.end;
                 }
 
                 if (useActualIndentation) {
                     // check if current node is a list item - if yes, take indentation from it
-                    let actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
+                    const actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
                     if (actualIndentation !== Value.Unknown) {
                         return actualIndentation + indentationDelta;
                     }
                 }
                 parentStart = getParentStart(parent, current, sourceFile);
-                let parentAndChildShareLine =
+                const parentAndChildShareLine =
                     parentStart.line === currentStart.line ||
                     childStartsOnTheSameLineWithElseInIfStatement(parent, current, currentStart.line, sourceFile);
 
@@ -167,7 +167,7 @@ namespace ts.formatting {
 
 
         function getParentStart(parent: Node, child: Node, sourceFile: SourceFile): LineAndCharacter {
-            let containingList = getContainingList(child, sourceFile);
+            const containingList = getContainingList(child, sourceFile);
             if (containingList) {
                 return sourceFile.getLineAndCharacterOfPosition(containingList.pos);
             }
@@ -180,7 +180,7 @@ namespace ts.formatting {
          */
         function getActualIndentationForListItemBeforeComma(commaToken: Node, sourceFile: SourceFile, options: EditorOptions): number {
             // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
-            let commaItemInfo = findListItemInfo(commaToken);
+            const commaItemInfo = findListItemInfo(commaToken);
             if (commaItemInfo && commaItemInfo.listItemIndex > 0) {
                 return deriveActualIndentationFromList(commaItemInfo.list.getChildren(), commaItemInfo.listItemIndex - 1, sourceFile, options);
             }
@@ -203,7 +203,7 @@ namespace ts.formatting {
             // actual indentation is used for statements\declarations if one of cases below is true:
             // - parent is SourceFile - by default immediate children of SourceFile are not indented except when user indents them manually
             // - parent and child are not on the same line
-            let useActualIndentation =
+            const useActualIndentation =
                 (isDeclaration(current) || isStatement(current)) &&
                 (parent.kind === SyntaxKind.SourceFile || !parentAndChildShareLine);
 
@@ -215,7 +215,7 @@ namespace ts.formatting {
         }
 
         function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken: Node, current: Node, lineAtPosition: number, sourceFile: SourceFile): boolean {
-            let nextToken = findNextToken(precedingToken, current);
+            const nextToken = findNextToken(precedingToken, current);
             if (!nextToken) {
                 return false;
             }
@@ -234,7 +234,7 @@ namespace ts.formatting {
                 // class A {
                 // $}
 
-                let nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
+                const nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
                 return lineAtPosition === nextTokenStartLine;
             }
 
@@ -247,10 +247,10 @@ namespace ts.formatting {
 
         export function childStartsOnTheSameLineWithElseInIfStatement(parent: Node, child: TextRangeWithKind, childStartLine: number, sourceFile: SourceFile): boolean {
             if (parent.kind === SyntaxKind.IfStatement && (<IfStatement>parent).elseStatement === child) {
-                let elseKeyword = findChildOfKind(parent, SyntaxKind.ElseKeyword, sourceFile);
+                const elseKeyword = findChildOfKind(parent, SyntaxKind.ElseKeyword, sourceFile);
                 Debug.assert(elseKeyword !== undefined);
 
-                let elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
+                const elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
                 return elseKeywordStartLine === childStartLine;
             }
 
@@ -277,7 +277,7 @@ namespace ts.formatting {
                     case SyntaxKind.MethodSignature:
                     case SyntaxKind.CallSignature:
                     case SyntaxKind.ConstructSignature: {
-                        let start = node.getStart(sourceFile);
+                        const start = node.getStart(sourceFile);
                         if ((<SignatureDeclaration>node.parent).typeParameters &&
                             rangeContainsStartEnd((<SignatureDeclaration>node.parent).typeParameters, start, node.getEnd())) {
                             return (<SignatureDeclaration>node.parent).typeParameters;
@@ -289,7 +289,7 @@ namespace ts.formatting {
                     }
                     case SyntaxKind.NewExpression:
                     case SyntaxKind.CallExpression: {
-                        let start = node.getStart(sourceFile);
+                        const start = node.getStart(sourceFile);
                         if ((<CallExpression>node.parent).typeArguments &&
                             rangeContainsStartEnd((<CallExpression>node.parent).typeArguments, start, node.getEnd())) {
                             return (<CallExpression>node.parent).typeArguments;
@@ -306,11 +306,11 @@ namespace ts.formatting {
         }
 
         function getActualIndentationForListItem(node: Node, sourceFile: SourceFile, options: EditorOptions): number {
-            let containingList = getContainingList(node, sourceFile);
+            const containingList = getContainingList(node, sourceFile);
             return containingList ? getActualIndentationFromList(containingList) : Value.Unknown;
 
             function getActualIndentationFromList(list: Node[]): number {
-                let index = indexOf(list, node);
+                const index = indexOf(list, node);
                 return index !== -1 ? deriveActualIndentationFromList(list, index, sourceFile, options) : Value.Unknown;
             }
         }
@@ -327,15 +327,15 @@ namespace ts.formatting {
                 node.parent.kind === SyntaxKind.NewExpression) &&
                 (<CallExpression>node.parent).expression !== node) {
 
-                let fullCallOrNewExpression = (<CallExpression | NewExpression>node.parent).expression;
-                let startingExpression = getStartingExpression(<PropertyAccessExpression | CallExpression | ElementAccessExpression>fullCallOrNewExpression);
+                const fullCallOrNewExpression = (<CallExpression | NewExpression>node.parent).expression;
+                const startingExpression = getStartingExpression(<PropertyAccessExpression | CallExpression | ElementAccessExpression>fullCallOrNewExpression);
 
                 if (fullCallOrNewExpression === startingExpression) {
                     return Value.Unknown;
                 }
 
-                let fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
-                let startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
+                const fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
+                const startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
 
                 if (fullCallOrNewExpressionEnd.line === startingExpressionEnd.line) {
                     return Value.Unknown;
@@ -365,17 +365,17 @@ namespace ts.formatting {
 
         function deriveActualIndentationFromList(list: Node[], index: number, sourceFile: SourceFile, options: EditorOptions): number {
             Debug.assert(index >= 0 && index < list.length);
-            let node = list[index];
+            const node = list[index];
 
             // walk toward the start of the list starting from current node and check if the line is the same for all items.
             // if end line for item [i - 1] differs from the start line for item [i] - find column of the first non-whitespace character on the line of item [i]
             let lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
-            for (let i = index - 1; i >= 0; --i) {
+            for (let i = index - 1; i >= 0; i--) {
                 if (list[i].kind === SyntaxKind.CommaToken) {
                     continue;
                 }
                 // skip list items that ends on the same line with the current list element
-                let prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
+                const prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
                 if (prevEndLine !== lineAndCharacter.line) {
                     return findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options);
                 }
@@ -386,7 +386,7 @@ namespace ts.formatting {
         }
 
         function findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter: LineAndCharacter, sourceFile: SourceFile, options: EditorOptions): number {
-            let lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
+            const lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
             return findFirstNonWhitespaceColumn(lineStart, lineStart + lineAndCharacter.character, sourceFile, options);
         }
 
@@ -400,8 +400,8 @@ namespace ts.formatting {
         export function findFirstNonWhitespaceCharacterAndColumn(startPos: number, endPos: number, sourceFile: SourceFile, options: EditorOptions) {
             let character = 0;
             let column = 0;
-            for (let pos = startPos; pos < endPos; ++pos) {
-                let ch = sourceFile.text.charCodeAt(pos);
+            for (let pos = startPos; pos < endPos; pos++) {
+                const ch = sourceFile.text.charCodeAt(pos);
                 if (!isWhiteSpace(ch)) {
                     break;
                 }
@@ -467,10 +467,10 @@ namespace ts.formatting {
             }
             return false;
         }
-        
+
         /* @internal */
         export function nodeWillIndentChild(parent: TextRangeWithKind, child: TextRangeWithKind, indentByDefault: boolean) {
-            let childKind = child ? child.kind : SyntaxKind.Unknown;
+            const childKind = child ? child.kind : SyntaxKind.Unknown;
             switch (parent.kind) {
                 case SyntaxKind.DoStatement:
                 case SyntaxKind.WhileStatement:
@@ -497,7 +497,7 @@ namespace ts.formatting {
         Function returns true when the parent node should indent the given child by an explicit rule
         */
         export function shouldIndentChildNode(parent: TextRangeWithKind, child?: TextRangeWithKind): boolean {
-            return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, false); 
+            return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, /*indentByDefault*/ false);
         }
     }
 }
diff --git a/src/services/formatting/tokenRange.ts b/src/services/formatting/tokenRange.ts
index 1afde613618..0e4ec4d221c 100644
--- a/src/services/formatting/tokenRange.ts
+++ b/src/services/formatting/tokenRange.ts
@@ -2,7 +2,7 @@
 
 /* @internal */
 namespace ts.formatting {
-    export module Shared {
+    export namespace Shared {
         export interface ITokenAccess {
             GetTokens(): SyntaxKind[];
             Contains(token: SyntaxKind): boolean;
@@ -60,7 +60,7 @@ namespace ts.formatting {
 
         export class TokenAllAccess implements ITokenAccess {
             public GetTokens(): SyntaxKind[] {
-                let result: SyntaxKind[] = [];
+                const result: SyntaxKind[] = [];
                 for (let token = SyntaxKind.FirstToken; token <= SyntaxKind.LastToken; token++) {
                     result.push(token);
                 }
diff --git a/src/services/signatureHelp.ts b/src/services/signatureHelp.ts
index 9e8a2f14ed8..53fb7a474a7 100644
--- a/src/services/signatureHelp.ts
+++ b/src/services/signatureHelp.ts
@@ -7,7 +7,7 @@ namespace ts.SignatureHelp {
     // To do this, the method will back parse the expression starting at the position required. it will try to parse the current expression as a generic type expression, if it did succeed it 
     // will return the generic identifier that started the expression (e.g. "foo" in "foo<any, |"). It is then up to the caller to ensure that this is a valid generic expression through 
     // looking up the type. The method will also keep track of the parameter index inside the expression.
-    //public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
+    // public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
     //    let token = Syntax.findTokenOnLeft(syntaxTree.sourceUnit(), position, /*includeSkippedTokens*/ true);
 
     //    if (token && TypeScript.Syntax.hasAncestorOfKind(token, TypeScript.SyntaxKind.TypeParameterList)) {
@@ -125,9 +125,9 @@ namespace ts.SignatureHelp {
     //    }
 
     //    return null;
-    //}
+    // }
 
-    //private static moveBackUpTillMatchingTokenKind(token: TypeScript.ISyntaxToken, tokenKind: TypeScript.SyntaxKind, matchingTokenKind: TypeScript.SyntaxKind): TypeScript.ISyntaxToken {
+    // private static moveBackUpTillMatchingTokenKind(token: TypeScript.ISyntaxToken, tokenKind: TypeScript.SyntaxKind, matchingTokenKind: TypeScript.SyntaxKind): TypeScript.ISyntaxToken {
     //    if (!token || token.kind() !== tokenKind) {
     //        throw TypeScript.Errors.invalidOperation();
     //    }
@@ -161,8 +161,8 @@ namespace ts.SignatureHelp {
 
     //    // Did not find matching token
     //    return null;
-    //}
-    let emptyArray: any[] = [];
+    // }
+    const emptyArray: any[] = [];
 
     const enum ArgumentListKind {
         TypeArguments,
@@ -179,16 +179,16 @@ namespace ts.SignatureHelp {
     }
 
     export function getSignatureHelpItems(program: Program, sourceFile: SourceFile, position: number, cancellationToken: CancellationToken): SignatureHelpItems {
-        let typeChecker = program.getTypeChecker();
+        const typeChecker = program.getTypeChecker();
 
         // Decide whether to show signature help
-        let startingToken = findTokenOnLeftOfPosition(sourceFile, position);
+        const startingToken = findTokenOnLeftOfPosition(sourceFile, position);
         if (!startingToken) {
             // We are at the beginning of the file
             return undefined;
         }
 
-        let argumentInfo = getContainingArgumentInfo(startingToken);
+        const argumentInfo = getContainingArgumentInfo(startingToken);
         cancellationToken.throwIfCancellationRequested();
 
         // Semantic filtering of signature help
@@ -196,9 +196,9 @@ namespace ts.SignatureHelp {
             return undefined;
         }
 
-        let call = argumentInfo.invocation;
-        let candidates = <Signature[]>[];
-        let resolvedSignature = typeChecker.getResolvedSignature(call, candidates);
+        const call = argumentInfo.invocation;
+        const candidates = <Signature[]>[];
+        const resolvedSignature = typeChecker.getResolvedSignature(call, candidates);
         cancellationToken.throwIfCancellationRequested();
 
         if (!candidates.length) {
@@ -219,9 +219,9 @@ namespace ts.SignatureHelp {
             }
 
             // See if we can find some symbol with the call expression name that has call signatures.
-            let callExpression = <CallExpression>argumentInfo.invocation;
-            let expression = callExpression.expression;
-            let name = expression.kind === SyntaxKind.Identifier
+            const callExpression = <CallExpression>argumentInfo.invocation;
+            const expression = callExpression.expression;
+            const name = expression.kind === SyntaxKind.Identifier
                 ? <Identifier> expression
                 : expression.kind === SyntaxKind.PropertyAccessExpression
                     ? (<PropertyAccessExpression>expression).name
@@ -231,18 +231,18 @@ namespace ts.SignatureHelp {
                 return undefined;
             }
 
-            let typeChecker = program.getTypeChecker();
-            for (let sourceFile of program.getSourceFiles()) {
-                let nameToDeclarations = sourceFile.getNamedDeclarations();
-                let declarations = getProperty(nameToDeclarations, name.text);
+            const typeChecker = program.getTypeChecker();
+            for (const sourceFile of program.getSourceFiles()) {
+                const nameToDeclarations = sourceFile.getNamedDeclarations();
+                const declarations = getProperty(nameToDeclarations, name.text);
 
                 if (declarations) {
-                    for (let declaration of declarations) {
-                        let symbol = declaration.symbol;
+                    for (const declaration of declarations) {
+                        const symbol = declaration.symbol;
                         if (symbol) {
-                            let type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
+                            const type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
                             if (type) {
-                                let callSignatures = type.getCallSignatures();
+                                const callSignatures = type.getCallSignatures();
                                 if (callSignatures && callSignatures.length) {
                                     return createSignatureHelpItems(callSignatures, callSignatures[0], argumentInfo);
                                 }
@@ -259,7 +259,7 @@ namespace ts.SignatureHelp {
          */
         function getImmediatelyContainingArgumentInfo(node: Node): ArgumentListInfo {
             if (node.parent.kind === SyntaxKind.CallExpression || node.parent.kind === SyntaxKind.NewExpression) {
-                let callExpression = <CallExpression>node.parent;
+                const callExpression = <CallExpression>node.parent;
                 // There are 3 cases to handle:
                 //   1. The token introduces a list, and should begin a sig help session
                 //   2. The token is either not associated with a list, or ends a list, so the session should end
@@ -278,8 +278,8 @@ namespace ts.SignatureHelp {
                     node.kind === SyntaxKind.OpenParenToken) {
                     // Find the list that starts right *after* the < or ( token.
                     // If the user has just opened a list, consider this item 0.
-                    let list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
-                    let isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
+                    const list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
+                    const isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
                     Debug.assert(list !== undefined);
                     return {
                         kind: isTypeArgList ? ArgumentListKind.TypeArguments : ArgumentListKind.CallArguments,
@@ -296,16 +296,16 @@ namespace ts.SignatureHelp {
                 //   - Between the type arguments and the arguments (greater than token)
                 //   - On the target of the call (parent.func)
                 //   - On the 'new' keyword in a 'new' expression
-                let listItemInfo = findListItemInfo(node);
+                const listItemInfo = findListItemInfo(node);
                 if (listItemInfo) {
-                    let list = listItemInfo.list;
-                    let isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
+                    const list = listItemInfo.list;
+                    const isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
 
-                    let argumentIndex = getArgumentIndex(list, node);
-                    let argumentCount = getArgumentCount(list);
+                    const argumentIndex = getArgumentIndex(list, node);
+                    const argumentCount = getArgumentCount(list);
 
                     Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount,
-                        `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`); 
+                        `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`);
 
                     return {
                         kind: isTypeArgList ? ArgumentListKind.TypeArguments : ArgumentListKind.CallArguments,
@@ -324,18 +324,18 @@ namespace ts.SignatureHelp {
                 }
             }
             else if (node.kind === SyntaxKind.TemplateHead && node.parent.parent.kind === SyntaxKind.TaggedTemplateExpression) {
-                let templateExpression = <TemplateExpression>node.parent;
-                let tagExpression = <TaggedTemplateExpression>templateExpression.parent;
+                const templateExpression = <TemplateExpression>node.parent;
+                const tagExpression = <TaggedTemplateExpression>templateExpression.parent;
                 Debug.assert(templateExpression.kind === SyntaxKind.TemplateExpression);
 
-                let argumentIndex = isInsideTemplateLiteral(<LiteralExpression>node, position) ? 0 : 1;
+                const argumentIndex = isInsideTemplateLiteral(<LiteralExpression>node, position) ? 0 : 1;
 
                 return getArgumentListInfoForTemplate(tagExpression, argumentIndex);
             }
             else if (node.parent.kind === SyntaxKind.TemplateSpan && node.parent.parent.parent.kind === SyntaxKind.TaggedTemplateExpression) {
-                let templateSpan = <TemplateSpan>node.parent;
-                let templateExpression = <TemplateExpression>templateSpan.parent;
-                let tagExpression = <TaggedTemplateExpression>templateExpression.parent;
+                const templateSpan = <TemplateSpan>node.parent;
+                const templateExpression = <TemplateExpression>templateSpan.parent;
+                const tagExpression = <TaggedTemplateExpression>templateExpression.parent;
                 Debug.assert(templateExpression.kind === SyntaxKind.TemplateExpression);
 
                 // If we're just after a template tail, don't show signature help.
@@ -343,12 +343,12 @@ namespace ts.SignatureHelp {
                     return undefined;
                 }
 
-                let spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
-                let argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node);
+                const spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
+                const argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node);
 
                 return getArgumentListInfoForTemplate(tagExpression, argumentIndex);
             }
-            
+
             return undefined;
         }
 
@@ -365,8 +365,8 @@ namespace ts.SignatureHelp {
             // that trailing comma in the list, and we'll have generated the appropriate
             // arg index.
             let argumentIndex = 0;
-            let listChildren = argumentsList.getChildren();
-            for (let child of listChildren) {
+            const listChildren = argumentsList.getChildren();
+            for (const child of listChildren) {
                 if (child === node) {
                     break;
                 }
@@ -390,7 +390,7 @@ namespace ts.SignatureHelp {
             // we'll have:  'a' '<comma>' '<missing>' 
             // That will give us 2 non-commas.  We then add one for the last comma, givin us an
             // arg count of 3.
-            let listChildren = argumentsList.getChildren();
+            const listChildren = argumentsList.getChildren();
 
             let argumentCount = countWhere(listChildren, arg => arg.kind !== SyntaxKind.CommaToken);
             if (listChildren.length > 0 && lastOrUndefined(listChildren).kind === SyntaxKind.CommaToken) {
@@ -426,11 +426,11 @@ namespace ts.SignatureHelp {
 
         function getArgumentListInfoForTemplate(tagExpression: TaggedTemplateExpression, argumentIndex: number): ArgumentListInfo {
             // argumentCount is either 1 or (numSpans + 1) to account for the template strings array argument.
-            let argumentCount = tagExpression.template.kind === SyntaxKind.NoSubstitutionTemplateLiteral
+            const argumentCount = tagExpression.template.kind === SyntaxKind.NoSubstitutionTemplateLiteral
                 ? 1
                 : (<TemplateExpression>tagExpression.template).templateSpans.length + 1;
 
-            Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`); 
+            Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`);
 
             return {
                 kind: ArgumentListKind.TaggedTemplateArguments,
@@ -450,14 +450,14 @@ namespace ts.SignatureHelp {
             //
             // The applicable span is from the first bar to the second bar (inclusive,
             // but not including parentheses)
-            let applicableSpanStart = argumentsList.getFullStart();
-            let applicableSpanEnd = skipTrivia(sourceFile.text, argumentsList.getEnd(), /*stopAfterLineBreak*/ false);
+            const applicableSpanStart = argumentsList.getFullStart();
+            const applicableSpanEnd = skipTrivia(sourceFile.text, argumentsList.getEnd(), /*stopAfterLineBreak*/ false);
             return createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
         }
 
         function getApplicableSpanForTaggedTemplate(taggedTemplate: TaggedTemplateExpression): TextSpan {
-            let template = taggedTemplate.template;
-            let applicableSpanStart = template.getStart();
+            const template = taggedTemplate.template;
+            const applicableSpanStart = template.getStart();
             let applicableSpanEnd = template.getEnd();
 
             // We need to adjust the end position for the case where the template does not have a tail.
@@ -470,7 +470,7 @@ namespace ts.SignatureHelp {
             // This is because a Missing node has no width. However, what we actually want is to include trivia
             // leading up to the next token in case the user is about to type in a TemplateMiddle or TemplateTail.
             if (template.kind === SyntaxKind.TemplateExpression) {
-                let lastSpan = lastOrUndefined((<TemplateExpression>template).templateSpans);
+                const lastSpan = lastOrUndefined((<TemplateExpression>template).templateSpans);
                 if (lastSpan.literal.getFullWidth() === 0) {
                     applicableSpanEnd = skipTrivia(sourceFile.text, applicableSpanEnd, /*stopAfterLineBreak*/ false);
                 }
@@ -491,7 +491,7 @@ namespace ts.SignatureHelp {
                     Debug.fail("Node of kind " + n.kind + " is not a subspan of its parent of kind " + n.parent.kind);
                 }
 
-                let argumentInfo = getImmediatelyContainingArgumentInfo(n);
+                const argumentInfo = getImmediatelyContainingArgumentInfo(n);
                 if (argumentInfo) {
                     return argumentInfo;
                 }
@@ -503,8 +503,8 @@ namespace ts.SignatureHelp {
         }
 
         function getChildListThatStartsWithOpenerToken(parent: Node, openerToken: Node, sourceFile: SourceFile): Node {
-            let children = parent.getChildren(sourceFile);
-            let indexOfOpenerToken = children.indexOf(openerToken);
+            const children = parent.getChildren(sourceFile);
+            const indexOfOpenerToken = children.indexOf(openerToken);
             Debug.assert(indexOfOpenerToken >= 0 && children.length > indexOfOpenerToken + 1);
             return children[indexOfOpenerToken + 1];
         }
@@ -521,7 +521,7 @@ namespace ts.SignatureHelp {
             let maxParamsSignatureIndex = -1;
             let maxParams = -1;
             for (let i = 0; i < candidates.length; i++) {
-                let candidate = candidates[i];
+                const candidate = candidates[i];
 
                 if (candidate.hasRestParameter || candidate.parameters.length >= argumentCount) {
                     return i;
@@ -537,17 +537,17 @@ namespace ts.SignatureHelp {
         }
 
         function createSignatureHelpItems(candidates: Signature[], bestSignature: Signature, argumentListInfo: ArgumentListInfo): SignatureHelpItems {
-            let applicableSpan = argumentListInfo.argumentsSpan;
-            let isTypeParameterList = argumentListInfo.kind === ArgumentListKind.TypeArguments;
+            const applicableSpan = argumentListInfo.argumentsSpan;
+            const isTypeParameterList = argumentListInfo.kind === ArgumentListKind.TypeArguments;
 
-            let invocation = argumentListInfo.invocation;
-            let callTarget = getInvokedExpression(invocation)
-            let callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
-            let callTargetDisplayParts = callTargetSymbol && symbolToDisplayParts(typeChecker, callTargetSymbol, /*enclosingDeclaration*/ undefined, /*meaning*/ undefined);
-            let items: SignatureHelpItem[] = map(candidates, candidateSignature => {
+            const invocation = argumentListInfo.invocation;
+            const callTarget = getInvokedExpression(invocation);
+            const callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
+            const callTargetDisplayParts = callTargetSymbol && symbolToDisplayParts(typeChecker, callTargetSymbol, /*enclosingDeclaration*/ undefined, /*meaning*/ undefined);
+            const items: SignatureHelpItem[] = map(candidates, candidateSignature => {
                 let signatureHelpParameters: SignatureHelpParameter[];
-                let prefixDisplayParts: SymbolDisplayPart[] = [];
-                let suffixDisplayParts: SymbolDisplayPart[] = [];
+                const prefixDisplayParts: SymbolDisplayPart[] = [];
+                const suffixDisplayParts: SymbolDisplayPart[] = [];
 
                 if (callTargetDisplayParts) {
                     addRange(prefixDisplayParts, callTargetDisplayParts);
@@ -555,28 +555,28 @@ namespace ts.SignatureHelp {
 
                 if (isTypeParameterList) {
                     prefixDisplayParts.push(punctuationPart(SyntaxKind.LessThanToken));
-                    let typeParameters = candidateSignature.typeParameters;
+                    const typeParameters = candidateSignature.typeParameters;
                     signatureHelpParameters = typeParameters && typeParameters.length > 0 ? map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
                     suffixDisplayParts.push(punctuationPart(SyntaxKind.GreaterThanToken));
-                    let parameterParts = mapToDisplayParts(writer =>
+                    const parameterParts = mapToDisplayParts(writer =>
                         typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisType, candidateSignature.parameters, writer, invocation));
                     addRange(suffixDisplayParts, parameterParts);
                 }
                 else {
-                    let typeParameterParts = mapToDisplayParts(writer =>
+                    const typeParameterParts = mapToDisplayParts(writer =>
                         typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation));
                     addRange(prefixDisplayParts, typeParameterParts);
                     prefixDisplayParts.push(punctuationPart(SyntaxKind.OpenParenToken));
 
-                    let parameters = candidateSignature.parameters;
+                    const parameters = candidateSignature.parameters;
                     signatureHelpParameters = parameters.length > 0 ? map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
                     suffixDisplayParts.push(punctuationPart(SyntaxKind.CloseParenToken));
                 }
 
-                let returnTypeParts = mapToDisplayParts(writer =>
+                const returnTypeParts = mapToDisplayParts(writer =>
                     typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation));
                 addRange(suffixDisplayParts, returnTypeParts);
-                
+
                 return {
                     isVariadic: candidateSignature.hasRestParameter,
                     prefixDisplayParts,
@@ -587,17 +587,17 @@ namespace ts.SignatureHelp {
                 };
             });
 
-            let argumentIndex = argumentListInfo.argumentIndex;
+            const argumentIndex = argumentListInfo.argumentIndex;
 
             // argumentCount is the *apparent* number of arguments.
-            let argumentCount = argumentListInfo.argumentCount;
+            const argumentCount = argumentListInfo.argumentCount;
 
             let selectedItemIndex = candidates.indexOf(bestSignature);
             if (selectedItemIndex < 0) {
                 selectedItemIndex = selectBestInvalidOverloadIndex(candidates, argumentCount);
             }
 
-            Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`); 
+            Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, `argumentCount < argumentIndex, ${argumentCount} < ${argumentIndex}`);
 
             return {
                 items,
@@ -608,7 +608,7 @@ namespace ts.SignatureHelp {
             };
 
             function createSignatureHelpParameterForParameter(parameter: Symbol): SignatureHelpParameter {
-                let displayParts = mapToDisplayParts(writer =>
+                const displayParts = mapToDisplayParts(writer =>
                     typeChecker.getSymbolDisplayBuilder().buildParameterDisplay(parameter, writer, invocation));
 
                 return {
@@ -620,7 +620,7 @@ namespace ts.SignatureHelp {
             }
 
             function createSignatureHelpParameterForTypeParameter(typeParameter: TypeParameter): SignatureHelpParameter {
-                let displayParts = mapToDisplayParts(writer =>
+                const displayParts = mapToDisplayParts(writer =>
                     typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(typeParameter, writer, invocation));
 
                 return {
diff --git a/src/services/utilities.ts b/src/services/utilities.ts
index 404fdf92d4d..34ae39c02d4 100644
--- a/src/services/utilities.ts
+++ b/src/services/utilities.ts
@@ -7,8 +7,8 @@ namespace ts {
     }
 
     export function getLineStartPositionForPosition(position: number, sourceFile: SourceFile): number {
-        let lineStarts = sourceFile.getLineStarts();
-        let line = sourceFile.getLineAndCharacterOfPosition(position).line;
+        const lineStarts = sourceFile.getLineStarts();
+        const line = sourceFile.getLineAndCharacterOfPosition(position).line;
         return lineStarts[line];
     }
 
@@ -29,8 +29,8 @@ namespace ts {
     }
 
     export function startEndOverlapsWithStartEnd(start1: number, end1: number, start2: number, end2: number) {
-        let start = Math.max(start1, start2);
-        let end = Math.min(end1, end2);
+        const start = Math.max(start1, start2);
+        const end = Math.min(end1, end2);
         return start < end;
     }
 
@@ -131,7 +131,7 @@ namespace ts {
                 return isCompletedNode((<IterationStatement>n).statement, sourceFile);
             case SyntaxKind.DoStatement:
                 // rough approximation: if DoStatement has While keyword - then if node is completed is checking the presence of ')';
-                let hasWhileKeyword = findChildOfKind(n, SyntaxKind.WhileKeyword, sourceFile);
+                const hasWhileKeyword = findChildOfKind(n, SyntaxKind.WhileKeyword, sourceFile);
                 if (hasWhileKeyword) {
                     return nodeEndsWith(n, SyntaxKind.CloseParenToken, sourceFile);
                 }
@@ -145,13 +145,13 @@ namespace ts {
             case SyntaxKind.VoidExpression:
             case SyntaxKind.YieldExpression:
             case SyntaxKind.SpreadElementExpression:
-                let unaryWordExpression = (<TypeOfExpression | DeleteExpression | VoidExpression | YieldExpression | SpreadElementExpression>n);
+                const unaryWordExpression = (<TypeOfExpression | DeleteExpression | VoidExpression | YieldExpression | SpreadElementExpression>n);
                 return isCompletedNode(unaryWordExpression.expression, sourceFile);
 
             case SyntaxKind.TaggedTemplateExpression:
                 return isCompletedNode((<TaggedTemplateExpression>n).template, sourceFile);
             case SyntaxKind.TemplateExpression:
-                let lastSpan = lastOrUndefined((<TemplateExpression>n).templateSpans);
+                const lastSpan = lastOrUndefined((<TemplateExpression>n).templateSpans);
                 return isCompletedNode(lastSpan, sourceFile);
             case SyntaxKind.TemplateSpan:
                 return nodeIsPresent((<TemplateSpan>n).literal);
@@ -173,9 +173,9 @@ namespace ts {
      * If child at position 'length - 1' is 'SemicolonToken' it is skipped and 'expectedLastToken' is compared with child at position 'length - 2'.
      */
     function nodeEndsWith(n: Node, expectedLastToken: SyntaxKind, sourceFile: SourceFile): boolean {
-        let children = n.getChildren(sourceFile);
+        const children = n.getChildren(sourceFile);
         if (children.length) {
-            let last = lastOrUndefined(children);
+            const last = lastOrUndefined(children);
             if (last.kind === expectedLastToken) {
                 return true;
             }
@@ -187,7 +187,7 @@ namespace ts {
     }
 
     export function findListItemInfo(node: Node): ListItemInfo {
-        let list = findContainingList(node);
+        const list = findContainingList(node);
 
         // It is possible at this point for syntaxList to be undefined, either if
         // node.parent had no list child, or if none of its list children contained
@@ -197,8 +197,8 @@ namespace ts {
             return undefined;
         }
 
-        let children = list.getChildren();
-        let listItemIndex = indexOf(children, node);
+        const children = list.getChildren();
+        const listItemIndex = indexOf(children, node);
 
         return {
             listItemIndex,
@@ -219,7 +219,7 @@ namespace ts {
         // be parented by the container of the SyntaxList, not the SyntaxList itself.
         // In order to find the list item index, we first need to locate SyntaxList itself and then search
         // for the position of the relevant node (or comma).
-        let syntaxList = forEach(node.parent.getChildren(), c => {
+        const syntaxList = forEach(node.parent.getChildren(), c => {
             // find syntax list that covers the span of the node
             if (c.kind === SyntaxKind.SyntaxList && c.pos <= node.pos && c.end >= node.end) {
                 return c;
@@ -266,16 +266,16 @@ namespace ts {
 
             // find the child that contains 'position'
             for (let i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
-                let child = current.getChildAt(i);
-                let start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile);
+                const child = current.getChildAt(i);
+                const start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile);
                 if (start <= position) {
-                    let end = child.getEnd();
+                    const end = child.getEnd();
                     if (position < end || (position === end && child.kind === SyntaxKind.EndOfFileToken)) {
                         current = child;
                         continue outer;
                     }
                     else if (includeItemAtEndPosition && end === position) {
-                        let previousToken = findPrecedingToken(position, sourceFile, child);
+                        const previousToken = findPrecedingToken(position, sourceFile, child);
                         if (previousToken && includeItemAtEndPosition(previousToken)) {
                             return previousToken;
                         }
@@ -297,7 +297,7 @@ namespace ts {
     export function findTokenOnLeftOfPosition(file: SourceFile, position: number): Node {
         // Ideally, getTokenAtPosition should return a token. However, it is currently
         // broken, so we do a check to make sure the result was indeed a token.
-        let tokenAtPosition = getTokenAtPosition(file, position);
+        const tokenAtPosition = getTokenAtPosition(file, position);
         if (isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
             return tokenAtPosition;
         }
@@ -314,9 +314,9 @@ namespace ts {
                 return n;
             }
 
-            let children = n.getChildren();
-            for (let child of children) {
-                let shouldDiveInChildNode =
+            const children = n.getChildren();
+            for (const child of children) {
+                const shouldDiveInChildNode =
                     // previous token is enclosed somewhere in the child
                     (child.pos <= previousToken.pos && child.end > previousToken.end) ||
                     // previous token ends exactly at the beginning of child
@@ -339,8 +339,8 @@ namespace ts {
                 return n;
             }
 
-            let children = n.getChildren();
-            let candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
+            const children = n.getChildren();
+            const candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
             return candidate && findRightmostToken(candidate);
 
         }
@@ -352,7 +352,7 @@ namespace ts {
 
             const children = n.getChildren();
             for (let i = 0, len = children.length; i < len; i++) {
-                let child = children[i];
+                const child = children[i];
                 // condition 'position < child.end' checks if child node end after the position
                 // in the example below this condition will be false for 'aaaa' and 'bbbb' and true for 'ccc'
                 // aaaa___bbbb___$__ccc
@@ -369,7 +369,7 @@ namespace ts {
 
                     if (lookInPreviousChild) {
                         // actual start of the node is past the position - previous token should be at the end of previous child
-                        let candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ i);
+                        const candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ i);
                         return candidate && findRightmostToken(candidate);
                     }
                     else {
@@ -386,14 +386,14 @@ namespace ts {
             // Try to find the rightmost token in the file without filtering.
             // Namely we are skipping the check: 'position < node.end'
             if (children.length) {
-                let candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
+                const candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
                 return candidate && findRightmostToken(candidate);
             }
         }
 
         /// finds last node that is considered as candidate for search (isCandidate(node) === true) starting from 'exclusiveStartPosition'
         function findRightmostChildNodeWithTokens(children: Node[], exclusiveStartPosition: number): Node {
-            for (let i = exclusiveStartPosition - 1; i >= 0; --i) {
+            for (let i = exclusiveStartPosition - 1; i >= 0; i--) {
                 if (nodeHasTokens(children[i])) {
                     return children[i];
                 }
@@ -402,7 +402,7 @@ namespace ts {
     }
 
     export function isInString(sourceFile: SourceFile, position: number) {
-        let token = getTokenAtPosition(sourceFile, position);
+        const token = getTokenAtPosition(sourceFile, position);
         return token && (token.kind === SyntaxKind.StringLiteral || token.kind === SyntaxKind.StringLiteralType) && position > token.getStart(sourceFile);
     }
 
@@ -414,7 +414,7 @@ namespace ts {
      * returns true if the position is in between the open and close elements of an JSX expression.
      */
     export function isInsideJsxElementOrAttribute(sourceFile: SourceFile, position: number) {
-        let token = getTokenAtPosition(sourceFile, position);
+        const token = getTokenAtPosition(sourceFile, position);
 
         if (!token) {
             return false;
@@ -446,7 +446,7 @@ namespace ts {
     }
 
     export function isInTemplateString(sourceFile: SourceFile, position: number) {
-        let token = getTokenAtPosition(sourceFile, position);
+        const token = getTokenAtPosition(sourceFile, position);
         return isTemplateLiteralKind(token.kind) && position > token.getStart(sourceFile);
     }
 
@@ -455,10 +455,10 @@ namespace ts {
      * satisfies predicate, and false otherwise.
      */
     export function isInCommentHelper(sourceFile: SourceFile, position: number, predicate?: (c: CommentRange) => boolean): boolean {
-        let token = getTokenAtPosition(sourceFile, position);
+        const token = getTokenAtPosition(sourceFile, position);
 
         if (token && position <= token.getStart(sourceFile)) {
-            let commentRanges = getLeadingCommentRanges(sourceFile.text, token.pos);
+            const commentRanges = getLeadingCommentRanges(sourceFile.text, token.pos);
 
             // The end marker of a single-line comment does not include the newline character.
             // In the following case, we are inside a comment (^ denotes the cursor position):
@@ -482,10 +482,10 @@ namespace ts {
     }
 
     export function hasDocComment(sourceFile: SourceFile, position: number) {
-        let token = getTokenAtPosition(sourceFile, position);
+        const token = getTokenAtPosition(sourceFile, position);
 
         // First, we have to see if this position actually landed in a comment.
-        let commentRanges = getLeadingCommentRanges(sourceFile.text, token.pos);
+        const commentRanges = getLeadingCommentRanges(sourceFile.text, token.pos);
 
         return forEach(commentRanges, jsDocPrefix);
 
@@ -515,9 +515,9 @@ namespace ts {
         }
 
         if (node) {
-            let jsDocComment = node.jsDocComment;
+            const jsDocComment = node.jsDocComment;
             if (jsDocComment) {
-                for (let tag of jsDocComment.tags) {
+                for (const tag of jsDocComment.tags) {
                     if (tag.pos <= position && position <= tag.end) {
                         return tag;
                     }
@@ -535,8 +535,8 @@ namespace ts {
     }
 
     export function getNodeModifiers(node: Node): string {
-        let flags = getCombinedNodeFlags(node);
-        let result: string[] = [];
+        const flags = getCombinedNodeFlags(node);
+        const result: string[] = [];
 
         if (flags & NodeFlags.Private) result.push(ScriptElementKindModifier.privateMemberModifier);
         if (flags & NodeFlags.Protected) result.push(ScriptElementKindModifier.protectedMemberModifier);
@@ -608,7 +608,7 @@ namespace ts {
     }
 
     export function compareDataObjects(dst: any, src: any): boolean {
-        for (let e in dst) {
+        for (const e in dst) {
             if (typeof dst[e] === "object") {
                 if (!compareDataObjects(dst[e], src[e])) {
                     return false;
@@ -661,7 +661,7 @@ namespace ts {
         return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === SyntaxKind.Parameter;
     }
 
-    let displayPartWriter = getDisplayPartWriter();
+    const displayPartWriter = getDisplayPartWriter();
     function getDisplayPartWriter(): DisplayPartsSymbolWriter {
         let displayParts: SymbolDisplayPart[];
         let lineStart: boolean;
@@ -687,7 +687,7 @@ namespace ts {
 
         function writeIndent() {
             if (lineStart) {
-                let indentString = getIndentString(indent);
+                const indentString = getIndentString(indent);
                 if (indentString) {
                     displayParts.push(displayPart(indentString, SymbolDisplayPartKind.space));
                 }
@@ -721,7 +721,7 @@ namespace ts {
         return displayPart(text, displayPartKind(symbol), symbol);
 
         function displayPartKind(symbol: Symbol): SymbolDisplayPartKind {
-            let flags = symbol.flags;
+            const flags = symbol.flags;
 
             if (flags & SymbolFlags.Variable) {
                 return isFirstDeclarationOfSymbolParameter(symbol) ? SymbolDisplayPartKind.parameterName : SymbolDisplayPartKind.localName;
@@ -792,7 +792,7 @@ namespace ts {
 
     export function mapToDisplayParts(writeDisplayParts: (writer: DisplayPartsSymbolWriter) => void): SymbolDisplayPart[] {
         writeDisplayParts(displayPartWriter);
-        let result = displayPartWriter.displayParts();
+        const result = displayPartWriter.displayParts();
         displayPartWriter.clear();
         return result;
     }
@@ -828,9 +828,9 @@ namespace ts {
 
         // Try to get the local symbol if we're dealing with an 'export default'
         // since that symbol has the "true" name.
-        let localExportDefaultSymbol = getLocalSymbolForExportDefault(symbol);
+        const localExportDefaultSymbol = getLocalSymbolForExportDefault(symbol);
 
-        let name = typeChecker.symbolToString(localExportDefaultSymbol || symbol);
+        const name = typeChecker.symbolToString(localExportDefaultSymbol || symbol);
 
         return name;
     }
@@ -847,7 +847,7 @@ namespace ts {
      * @return non-quoted string
      */
     export function stripQuotes(name: string) {
-        let length = name.length;
+        const length = name.length;
         if (length >= 2 &&
             name.charCodeAt(0) === name.charCodeAt(length - 1) &&
             (name.charCodeAt(0) === CharacterCodes.doubleQuote || name.charCodeAt(0) === CharacterCodes.singleQuote)) {

From dbd30542a6a7ecdb3b6a2594a353bb91d0bbcdd7 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 25 May 2016 07:16:23 -0700
Subject: [PATCH 081/332] Include classes as childItems in navigation bar

---
 src/services/navigationBar.ts                               | 3 +++
 tests/cases/fourslash/navbar_contains-no-duplicates.ts      | 4 ++--
 .../navigationBarItemsBindingPatternsInConstructor.ts       | 2 +-
 .../cases/fourslash/navigationBarItemsEmptyConstructors.ts  | 2 +-
 .../navigationBarItemsInsideMethodsAndConstructors.ts       | 2 +-
 tests/cases/fourslash/navigationBarItemsItems.ts            | 4 ++--
 .../fourslash/navigationBarItemsItemsExternalModules.ts     | 4 ++--
 .../fourslash/navigationBarItemsItemsExternalModules2.ts    | 4 ++--
 .../fourslash/navigationBarItemsItemsExternalModules3.ts    | 4 ++--
 tests/cases/fourslash/navigationBarItemsMissingName1.ts     | 6 +++---
 .../navigationBarItemsMultilineStringIdentifiers.ts         | 4 ++--
 .../navigationBarItemsPropertiesDefinedInConstructors.ts    | 2 +-
 tests/cases/fourslash/navigationBarItemsSymbols1.ts         | 5 +++--
 tests/cases/fourslash/server/navbar01.ts                    | 4 ++--
 14 files changed, 27 insertions(+), 23 deletions(-)

diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index cb81c398cb8..f05f3f3a6e6 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -330,6 +330,9 @@ namespace ts.NavigationBar {
                 case SyntaxKind.PropertySignature:
                     return createItem(node, getTextOfNode((<PropertyDeclaration>node).name), ts.ScriptElementKind.memberVariableElement);
 
+                case SyntaxKind.ClassDeclaration:
+                    return createItem(node, getTextOfNode((<ClassDeclaration>node).name), ts.ScriptElementKind.classElement);
+
                 case SyntaxKind.FunctionDeclaration:
                     return createItem(node, getTextOfNode((<FunctionLikeDeclaration>node).name), ts.ScriptElementKind.functionElement);
 
diff --git a/tests/cases/fourslash/navbar_contains-no-duplicates.ts b/tests/cases/fourslash/navbar_contains-no-duplicates.ts
index ec86e4b2f20..a698e5b0f0e 100644
--- a/tests/cases/fourslash/navbar_contains-no-duplicates.ts
+++ b/tests/cases/fourslash/navbar_contains-no-duplicates.ts
@@ -2,7 +2,7 @@
 //// {| "itemName": "Windows", "kind": "module", "parentName": "" |}declare module Windows {
 ////     {| "itemName": "Foundation", "kind": "module", "parentName": "" |}export module Foundation {
 ////         export var {| "itemName": "A", "kind": "var" |}A;
-////         {| "itemName": "Test", "kind": "class" |}export class Test {
+////         {| "itemName": "Test", "kind": "class", "parentName": "Foundation" |}export class Test {
 ////             {| "itemName": "wow", "kind": "method" |}public wow();
 ////         }
 ////     }
@@ -38,4 +38,4 @@ test.markers().forEach(marker => {
             marker.position);
     }
 });
-verify.navigationBarCount(12);
\ No newline at end of file
+verify.navigationBarCount(15);
\ No newline at end of file
diff --git a/tests/cases/fourslash/navigationBarItemsBindingPatternsInConstructor.ts b/tests/cases/fourslash/navigationBarItemsBindingPatternsInConstructor.ts
index 84c1d09efe7..24979e141e5 100644
--- a/tests/cases/fourslash/navigationBarItemsBindingPatternsInConstructor.ts
+++ b/tests/cases/fourslash/navigationBarItemsBindingPatternsInConstructor.ts
@@ -11,4 +11,4 @@
 ////    }
 ////}
 
-verify.navigationBarCount(6); // 2x(class + field + constructor)
+verify.navigationBarCount(9); // global + 2 children + 2x(class + field + constructor)
diff --git a/tests/cases/fourslash/navigationBarItemsEmptyConstructors.ts b/tests/cases/fourslash/navigationBarItemsEmptyConstructors.ts
index 2255d29e293..a80f4c596d4 100644
--- a/tests/cases/fourslash/navigationBarItemsEmptyConstructors.ts
+++ b/tests/cases/fourslash/navigationBarItemsEmptyConstructors.ts
@@ -9,4 +9,4 @@ verify.navigationBarContains("Test", "class");
 verify.navigationBarContains("constructor", "constructor");
 
 // no other items
-verify.navigationBarCount(2);
\ No newline at end of file
+verify.navigationBarCount(4); // global + 1 child, Test + 1 child
\ No newline at end of file
diff --git a/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts b/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
index 89b05dc6b07..3d2c026d360 100644
--- a/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
+++ b/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
@@ -39,4 +39,4 @@ test.markers().forEach((marker) => {
 });
 
 // no other items
-verify.navigationBarCount(19);
+verify.navigationBarCount(21);
diff --git a/tests/cases/fourslash/navigationBarItemsItems.ts b/tests/cases/fourslash/navigationBarItemsItems.ts
index 5cae68b1194..95fdecd369c 100644
--- a/tests/cases/fourslash/navigationBarItemsItems.ts
+++ b/tests/cases/fourslash/navigationBarItemsItems.ts
@@ -13,7 +13,7 @@
 ////{| "itemName": "Shapes", "kind": "module", "parentName": "" |}module Shapes {
 ////
 ////    // Class
-////    {| "itemName": "Point", "kind": "class", "parentName": "" |}export class Point implements IPoint {
+////    {| "itemName": "Point", "kind": "class", "parentName": "Shapes" |}export class Point implements IPoint {
 ////        {| "itemName": "constructor", "kind": "constructor", "parentName": "Point" |}constructor (public x: number, public y: number) { }
 ////
 ////        // Instance member
@@ -49,4 +49,4 @@ test.markers().forEach((marker) => {
     }
 });
 
-verify.navigationBarCount(24);
+verify.navigationBarCount(25);
diff --git a/tests/cases/fourslash/navigationBarItemsItemsExternalModules.ts b/tests/cases/fourslash/navigationBarItemsItemsExternalModules.ts
index 64a595cafb1..7b2e0def4bf 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsExternalModules.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsExternalModules.ts
@@ -1,6 +1,6 @@
 /// <reference path="fourslash.ts"/>
 
-////{| "itemName": "Bar", "kind": "class" |}export class Bar {
+////{| "itemName": "Bar", "kind": "class", "parentName": "\"navigationBarItemsItemsExternalModules\"" |}export class Bar {
 ////    {| "itemName": "s", "kind": "property", "parentName": "Bar" |}public s: string;
 ////}
 
@@ -8,4 +8,4 @@ test.markers().forEach((marker) => {
     verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
 });
 
-verify.navigationBarCount(2); // external module node + class + property
+verify.navigationBarCount(4); // external module node + class + property
diff --git a/tests/cases/fourslash/navigationBarItemsItemsExternalModules2.ts b/tests/cases/fourslash/navigationBarItemsItemsExternalModules2.ts
index 7c1c32cff76..9087493b298 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsExternalModules2.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsExternalModules2.ts
@@ -1,7 +1,7 @@
 /// <reference path="fourslash.ts"/>
 
 // @Filename: test/file.ts
-////{| "itemName": "Bar", "kind": "class" |}export class Bar {
+////{| "itemName": "Bar", "kind": "class", "parentName": "\"file\"" |}export class Bar {
 ////    {| "itemName": "s", "kind": "property", "parentName": "Bar" |}public s: string;
 ////}
 ////{| "itemName": "\"file\"", "kind": "module" |}
@@ -12,4 +12,4 @@ test.markers().forEach((marker) => {
     verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
 });
 
-verify.navigationBarCount(4); // external module node + variable in module + class + property
+verify.navigationBarCount(5); // external module node + variable in module + class + property
diff --git a/tests/cases/fourslash/navigationBarItemsItemsExternalModules3.ts b/tests/cases/fourslash/navigationBarItemsItemsExternalModules3.ts
index 6e6dc9871cc..a00b3a131dd 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsExternalModules3.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsExternalModules3.ts
@@ -1,7 +1,7 @@
 /// <reference path="fourslash.ts"/>
 
 // @Filename: test/my fil"e.ts
-////{| "itemName": "Bar", "kind": "class" |}export class Bar {
+////{| "itemName": "Bar", "kind": "class", "parentName": "\"my fil\\\"e\"" |}export class Bar {
 ////    {| "itemName": "s", "kind": "property", "parentName": "Bar" |}public s: string;
 ////}
 ////{| "itemName": "\"my fil\\\"e\"", "kind": "module" |}
@@ -12,4 +12,4 @@ test.markers().forEach((marker) => {
     verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
 });
 
-verify.navigationBarCount(4); // external module node + variable in module + class + property
+verify.navigationBarCount(5); // external module node + 2 children + class + property
diff --git a/tests/cases/fourslash/navigationBarItemsMissingName1.ts b/tests/cases/fourslash/navigationBarItemsMissingName1.ts
index 98321039c5a..59f2911f3aa 100644
--- a/tests/cases/fourslash/navigationBarItemsMissingName1.ts
+++ b/tests/cases/fourslash/navigationBarItemsMissingName1.ts
@@ -2,7 +2,7 @@
 /////**
 //// * This is a class.
 //// */
-////{| "itemName": "C", "kind": "class" |} class C {
+////{| "itemName": "C", "kind": "class", "parentName": "\"navigationBarItemsMissingName1\"" |} class C {
 ////    {| "itemName": "foo", "kind": "method" |} foo() {
 ////    }
 ////}
@@ -12,5 +12,5 @@ test.markers().forEach((marker) => {
     verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
 });
 
-/// Only have two named elements.
-verify.navigationBarCount(2);
+/// Root + 1 child, class + 1 child
+verify.navigationBarCount(4);
diff --git a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
index 8856c4c044a..54524436d40 100644
--- a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
+++ b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
@@ -20,7 +20,7 @@
 ////    b"(): Foo;
 ////}
 ////
-////{| "itemName": "Bar", "kind": "class" |}
+////{| "itemName": "Bar", "kind": "class", "parentName": "<global>" |}
 ////class Bar implements Foo {
 ////    {| "itemName": "'a1\\\\\\r\\nb'", "kind": "property", "parentName": "Bar" |}
 ////    'a1\\\r\nb': Foo;
@@ -38,4 +38,4 @@ test.markers().forEach((marker) => {
     verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
 });
 
-verify.navigationBarCount(9); // interface w/ 2 properties, class w/ 2 properties, 3 modules
\ No newline at end of file
+verify.navigationBarCount(11); // global + 1 child, interface w/ 2 properties, class w/ 2 properties, 3 modules
\ No newline at end of file
diff --git a/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts b/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts
index 9b3f4aacd9c..8e1981f6101 100644
--- a/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts
+++ b/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts
@@ -12,4 +12,4 @@ verify.navigationBarContains("a", "property");
 verify.navigationBarContains("b", "property");
 
 // no other items
-verify.navigationBarCount(4);
\ No newline at end of file
+verify.navigationBarCount(6);
\ No newline at end of file
diff --git a/tests/cases/fourslash/navigationBarItemsSymbols1.ts b/tests/cases/fourslash/navigationBarItemsSymbols1.ts
index c9df85b3ece..6d55812fa0e 100644
--- a/tests/cases/fourslash/navigationBarItemsSymbols1.ts
+++ b/tests/cases/fourslash/navigationBarItemsSymbols1.ts
@@ -1,6 +1,6 @@
 /// <reference path="fourslash.ts"/>
 
-////{| "itemName": "C", "kind": "class", "parentName": "" |}
+////{| "itemName": "C", "kind": "class", "parentName": "<global>" |}
 ////class C {
 ////    {| "itemName": "[Symbol.isRegExp]", "kind": "property", "parentName": "C" |}
 ////    [Symbol.isRegExp] = 0;
@@ -14,4 +14,5 @@ test.markers().forEach(marker => {
     verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
 });
 
-verify.navigationBarCount(test.markers().length);
\ No newline at end of file
+// 2 lack markers: <global> and its child
+verify.navigationBarCount(2 + test.markers().length);
\ No newline at end of file
diff --git a/tests/cases/fourslash/server/navbar01.ts b/tests/cases/fourslash/server/navbar01.ts
index e4e2b699be5..ead4cafe0c8 100644
--- a/tests/cases/fourslash/server/navbar01.ts
+++ b/tests/cases/fourslash/server/navbar01.ts
@@ -13,7 +13,7 @@
 ////{| "itemName": "Shapes", "kind": "module", "parentName": "" |}module Shapes {
 ////
 ////    // Class
-////    {| "itemName": "Point", "kind": "class", "parentName": "" |}export class Point implements IPoint {
+////    {| "itemName": "Point", "kind": "class", "parentName": "Shapes" |}export class Point implements IPoint {
 ////        {| "itemName": "constructor", "kind": "constructor", "parentName": "Point" |}constructor (public x: number, public y: number) { }
 ////
 ////        // Instance member
@@ -49,4 +49,4 @@ test.markers().forEach((marker) => {
     }
 });
 
-verify.navigationBarCount(24);
+verify.navigationBarCount(25);

From 91b473389b042e0e6e38763fbfce0b775f9cbb57 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 25 May 2016 07:34:35 -0700
Subject: [PATCH 082/332] Include interfaces as childItems in navigation bar

---
 src/services/navigationBar.ts                               | 3 +++
 .../navigationBarItemsInsideMethodsAndConstructors.ts       | 6 +++---
 tests/cases/fourslash/navigationBarItemsItems.ts            | 4 ++--
 .../navigationBarItemsMultilineStringIdentifiers.ts         | 4 ++--
 tests/cases/fourslash/navigationBarItemsSymbols2.ts         | 5 +++--
 tests/cases/fourslash/server/navbar01.ts                    | 4 ++--
 6 files changed, 15 insertions(+), 11 deletions(-)

diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index cb81c398cb8..2896031eb96 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -320,6 +320,9 @@ namespace ts.NavigationBar {
                 case SyntaxKind.EnumMember:
                     return createItem(node, getTextOfNode((<EnumMember>node).name), ts.ScriptElementKind.memberVariableElement);
 
+                case SyntaxKind.InterfaceDeclaration:
+                    return createItem(node, getTextOfNode((<InterfaceDeclaration>node).name), ts.ScriptElementKind.interfaceElement);
+
                 case SyntaxKind.CallSignature:
                     return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
 
diff --git a/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts b/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
index 89b05dc6b07..d6fb0a91eb2 100644
--- a/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
+++ b/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
@@ -6,7 +6,7 @@
 ////
 ////        }
 ////
-////        {| "itemName": "LocalInterfaceInConstrcutor", "kind": "interface", "parentName": ""|}interface LocalInterfaceInConstrcutor {
+////        {| "itemName": "LocalInterfaceInConstrcutor", "kind": "interface", "parentName": "constructor"|}interface LocalInterfaceInConstrcutor {
 ////        }
 ////
 ////        {| "itemName": "LocalEnumInConstructor", "kind": "enum", "parentName": "constructor"|}enum LocalEnumInConstructor {
@@ -21,7 +21,7 @@
 ////            }
 ////        }
 ////
-////        {| "itemName": "LocalInterfaceInMethod", "kind": "interface", "parentName": ""|}interface LocalInterfaceInMethod {
+////        {| "itemName": "LocalInterfaceInMethod", "kind": "interface", "parentName": "method"|}interface LocalInterfaceInMethod {
 ////        }
 ////
 ////        {| "itemName": "LocalEnumInMethod", "kind": "enum", "parentName": "method"|}enum LocalEnumInMethod {
@@ -39,4 +39,4 @@ test.markers().forEach((marker) => {
 });
 
 // no other items
-verify.navigationBarCount(19);
+verify.navigationBarCount(21);
diff --git a/tests/cases/fourslash/navigationBarItemsItems.ts b/tests/cases/fourslash/navigationBarItemsItems.ts
index 5cae68b1194..d9ae3d35dff 100644
--- a/tests/cases/fourslash/navigationBarItemsItems.ts
+++ b/tests/cases/fourslash/navigationBarItemsItems.ts
@@ -1,7 +1,7 @@
 /// <reference path="fourslash.ts"/>
 
 ////// Interface
-////{| "itemName": "IPoint", "kind": "interface", "parentName": "" |}interface IPoint {
+////{| "itemName": "IPoint", "kind": "interface", "parentName": "<global>" |}interface IPoint {
 ////    {| "itemName": "getDist", "kind": "method", "parentName": "IPoint" |}getDist(): number;
 ////    {| "itemName": "new()", "kind": "construct", "parentName": "IPoint" |}new(): IPoint;
 ////    {| "itemName": "()", "kind": "call", "parentName": "IPoint" |}(): any;
@@ -49,4 +49,4 @@ test.markers().forEach((marker) => {
     }
 });
 
-verify.navigationBarCount(24);
+verify.navigationBarCount(25);
diff --git a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
index 8856c4c044a..f779c7a0580 100644
--- a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
+++ b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
@@ -10,7 +10,7 @@
 ////{| "itemName": "\"MultilineMadness\"", "kind": "module" |}
 ////declare module "MultilineMadness" {}
 ////
-////{| "itemName": "Foo", "kind": "interface" |}
+////{| "itemName": "Foo", "kind": "interface", "parentName": "<global>" |}
 ////interface Foo {
 ////    {| "itemName": "\"a1\\\\\\r\\nb\"", "kind": "property", "parentName": "Foo" |}
 ////    "a1\\\r\nb";
@@ -38,4 +38,4 @@ test.markers().forEach((marker) => {
     verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
 });
 
-verify.navigationBarCount(9); // interface w/ 2 properties, class w/ 2 properties, 3 modules
\ No newline at end of file
+verify.navigationBarCount(11); // interface w/ 2 properties, class w/ 2 properties, 3 modules
\ No newline at end of file
diff --git a/tests/cases/fourslash/navigationBarItemsSymbols2.ts b/tests/cases/fourslash/navigationBarItemsSymbols2.ts
index 579a6353c13..5c398f77bbd 100644
--- a/tests/cases/fourslash/navigationBarItemsSymbols2.ts
+++ b/tests/cases/fourslash/navigationBarItemsSymbols2.ts
@@ -1,6 +1,6 @@
 /// <reference path="fourslash.ts"/>
 
-////{| "itemName": "I", "kind": "interface", "parentName": "" |}
+////{| "itemName": "I", "kind": "interface", "parentName": "<global>" |}
 ////interface I {
 ////    {| "itemName": "[Symbol.isRegExp]", "kind": "property", "parentName": "I" |}
 ////    [Symbol.isRegExp]: string;
@@ -12,4 +12,5 @@ test.markers().forEach(marker => {
     verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
 });
 
-verify.navigationBarCount(test.markers().length);
\ No newline at end of file
+// 2 are not marked: <global> and its child.
+verify.navigationBarCount(2 + test.markers().length);
\ No newline at end of file
diff --git a/tests/cases/fourslash/server/navbar01.ts b/tests/cases/fourslash/server/navbar01.ts
index e4e2b699be5..05e92c2835f 100644
--- a/tests/cases/fourslash/server/navbar01.ts
+++ b/tests/cases/fourslash/server/navbar01.ts
@@ -1,7 +1,7 @@
 /// <reference path="../fourslash.ts"/>
 
 ////// Interface
-////{| "itemName": "IPoint", "kind": "interface", "parentName": "" |}interface IPoint {
+////{| "itemName": "IPoint", "kind": "interface", "parentName": "<global>" |}interface IPoint {
 ////    {| "itemName": "getDist", "kind": "method", "parentName": "IPoint" |}getDist(): number;
 ////    {| "itemName": "new()", "kind": "construct", "parentName": "IPoint" |}new(): IPoint;
 ////    {| "itemName": "()", "kind": "call", "parentName": "IPoint" |}(): any;
@@ -49,4 +49,4 @@ test.markers().forEach((marker) => {
     }
 });
 
-verify.navigationBarCount(24);
+verify.navigationBarCount(25);

From 109c05863ee95c19afabb1340006cca66c1828d4 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 25 May 2016 07:49:56 -0700
Subject: [PATCH 083/332] Include modules as childItems in navigation bar

---
 src/services/navigationBar.ts                 | 44 ++++++++++---------
 .../navbar_contains-no-duplicates.ts          | 12 ++---
 .../fourslash/navigationBarItemsItems.ts      |  4 +-
 .../fourslash/navigationBarItemsItems2.ts     |  2 +-
 .../navigationBarItemsItemsModuleVariables.ts |  4 +-
 .../fourslash/navigationBarItemsModules.ts    | 19 ++++----
 ...ationBarItemsMultilineStringIdentifiers.ts |  8 ++--
 tests/cases/fourslash/server/navbar01.ts      |  4 +-
 8 files changed, 51 insertions(+), 46 deletions(-)

diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index cb81c398cb8..53b1ca0b02c 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -320,6 +320,10 @@ namespace ts.NavigationBar {
                 case SyntaxKind.EnumMember:
                     return createItem(node, getTextOfNode((<EnumMember>node).name), ts.ScriptElementKind.memberVariableElement);
 
+                //move?
+                case SyntaxKind.ModuleDeclaration:
+                    return createItem(node, getModuleName(<ModuleDeclaration>node), ts.ScriptElementKind.moduleElement);
+
                 case SyntaxKind.CallSignature:
                     return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
 
@@ -433,26 +437,6 @@ namespace ts.NavigationBar {
 
             return undefined;
 
-            function getModuleName(moduleDeclaration: ModuleDeclaration): string {
-                // We want to maintain quotation marks.
-                if (isAmbientModule(moduleDeclaration)) {
-                    return getTextOfNode(moduleDeclaration.name);
-                }
-
-                // Otherwise, we need to aggregate each identifier to build up the qualified name.
-                const result: string[] = [];
-
-                result.push(moduleDeclaration.name.text);
-
-                while (moduleDeclaration.body && moduleDeclaration.body.kind === SyntaxKind.ModuleDeclaration) {
-                    moduleDeclaration = <ModuleDeclaration>moduleDeclaration.body;
-
-                    result.push(moduleDeclaration.name.text);
-                }
-
-                return result.join(".");
-            }
-
             function createModuleItem(node: ModuleDeclaration): NavigationBarItem {
                 const moduleName = getModuleName(node);
 
@@ -587,6 +571,26 @@ namespace ts.NavigationBar {
             }
         }
 
+        function getModuleName(moduleDeclaration: ModuleDeclaration): string {
+            // We want to maintain quotation marks.
+            if (isAmbientModule(moduleDeclaration)) {
+                return getTextOfNode(moduleDeclaration.name);
+            }
+
+            // Otherwise, we need to aggregate each identifier to build up the qualified name.
+            const result: string[] = [];
+
+            result.push(moduleDeclaration.name.text);
+
+            while (moduleDeclaration.body && moduleDeclaration.body.kind === SyntaxKind.ModuleDeclaration) {
+                moduleDeclaration = <ModuleDeclaration>moduleDeclaration.body;
+
+                result.push(moduleDeclaration.name.text);
+            }
+
+            return result.join(".");
+        }
+
         function removeComputedProperties(node: EnumDeclaration): Declaration[] {
             return filter<Declaration>(node.members, member => member.name === undefined || member.name.kind !== SyntaxKind.ComputedPropertyName);
         }
diff --git a/tests/cases/fourslash/navbar_contains-no-duplicates.ts b/tests/cases/fourslash/navbar_contains-no-duplicates.ts
index ec86e4b2f20..380b9be04f0 100644
--- a/tests/cases/fourslash/navbar_contains-no-duplicates.ts
+++ b/tests/cases/fourslash/navbar_contains-no-duplicates.ts
@@ -1,6 +1,6 @@
 /// <reference path="fourslash.ts" />
-//// {| "itemName": "Windows", "kind": "module", "parentName": "" |}declare module Windows {
-////     {| "itemName": "Foundation", "kind": "module", "parentName": "" |}export module Foundation {
+//// {| "itemName": "Windows", "kind": "module", "parentName": "<global>" |}declare module Windows {
+////     {| "itemName": "Foundation", "kind": "module", "parentName": "Windows" |}export module Foundation {
 ////         export var {| "itemName": "A", "kind": "var" |}A;
 ////         {| "itemName": "Test", "kind": "class" |}export class Test {
 ////             {| "itemName": "wow", "kind": "method" |}public wow();
@@ -8,8 +8,8 @@
 ////     }
 //// }
 //// 
-//// {| "itemName": "Windows", "kind": "module", "parentName": "", "isAdditionalRange": true |}declare module Windows {
-////     {| "itemName": "Foundation", "kind": "module", "parentName": "", "isAdditionalRange": true |}export module Foundation {
+//// {| "itemName": "Windows", "kind": "module", "parentName": "<global>", "isAdditionalRange": true |}declare module Windows {
+////     {| "itemName": "Foundation", "kind": "module", "parentName": "Windows", "isAdditionalRange": true |}export module Foundation {
 ////         export var {| "itemName": "B", "kind": "var" |}B;
 ////         {| "itemName": "Test", "kind": "module" |}export module Test {
 ////             {| "itemName": "Boom", "kind": "function" |}export function Boom(): number;
@@ -23,7 +23,7 @@
 ////     }
 //// }
 //// 
-//// {| "itemName": "ABC", "kind": "module", "parentName": "" |}module ABC {
+//// {| "itemName": "ABC", "kind": "module", "parentName": "<global>" |}module ABC {
 ////     export var {| "itemName": "x", "kind": "var" |}x = 3;
 //// }
 
@@ -38,4 +38,4 @@ test.markers().forEach(marker => {
             marker.position);
     }
 });
-verify.navigationBarCount(12);
\ No newline at end of file
+verify.navigationBarCount(17);
\ No newline at end of file
diff --git a/tests/cases/fourslash/navigationBarItemsItems.ts b/tests/cases/fourslash/navigationBarItemsItems.ts
index 5cae68b1194..582aad019b9 100644
--- a/tests/cases/fourslash/navigationBarItemsItems.ts
+++ b/tests/cases/fourslash/navigationBarItemsItems.ts
@@ -10,7 +10,7 @@
 ////}
 ////
 /////// Module
-////{| "itemName": "Shapes", "kind": "module", "parentName": "" |}module Shapes {
+////{| "itemName": "Shapes", "kind": "module", "parentName": "<global>" |}module Shapes {
 ////
 ////    // Class
 ////    {| "itemName": "Point", "kind": "class", "parentName": "" |}export class Point implements IPoint {
@@ -49,4 +49,4 @@ test.markers().forEach((marker) => {
     }
 });
 
-verify.navigationBarCount(24);
+verify.navigationBarCount(25);
diff --git a/tests/cases/fourslash/navigationBarItemsItems2.ts b/tests/cases/fourslash/navigationBarItemsItems2.ts
index d4ffde54051..013f27b4d71 100644
--- a/tests/cases/fourslash/navigationBarItemsItems2.ts
+++ b/tests/cases/fourslash/navigationBarItemsItems2.ts
@@ -8,5 +8,5 @@ edit.insertLine("module A");
 edit.insert("export class ");
 
 // should not crash
-verify.navigationBarCount(2);
+verify.navigationBarCount(4);
 
diff --git a/tests/cases/fourslash/navigationBarItemsItemsModuleVariables.ts b/tests/cases/fourslash/navigationBarItemsItemsModuleVariables.ts
index afc1acfb9cb..5429011888c 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsModuleVariables.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsModuleVariables.ts
@@ -22,9 +22,9 @@ goTo.marker("file1");
 verify.navigationBarContains("Module1", "module");
 verify.navigationBarContains("x", "var");
 // nothing else should show up
-verify.navigationBarCount(2);
+verify.navigationBarCount(4); // <global>, its child, Module1, its child
 
 goTo.marker("file2");
 verify.navigationBarContains("Module1.SubModule", "module");
 verify.navigationBarContains("y", "var");
-verify.navigationBarCount(2);
+verify.navigationBarCount(4);
diff --git a/tests/cases/fourslash/navigationBarItemsModules.ts b/tests/cases/fourslash/navigationBarItemsModules.ts
index 895a9e23a06..237ec8eb275 100644
--- a/tests/cases/fourslash/navigationBarItemsModules.ts
+++ b/tests/cases/fourslash/navigationBarItemsModules.ts
@@ -1,35 +1,36 @@
+/// <reference path="fourslash.ts"/>
 
-////{| "itemName": "\"X.Y.Z\"", "kind": "module" |}
+////{| "itemName": "\"X.Y.Z\"", "kind": "module", "parentName": "<global>" |}
 ////declare module "X.Y.Z" {
 ////}
 ////
-////{| "itemName": "'X2.Y2.Z2'", "kind": "module" |}
+////{| "itemName": "'X2.Y2.Z2'", "kind": "module", "parentName": "<global>" |}
 ////declare module 'X2.Y2.Z2' {
 ////}
 ////
-////{| "itemName": "A.B.C", "kind": "module" |}
+////{| "itemName": "A.B.C", "kind": "module", "parentName": "<global>" |}
 ////module A.B.C {
 ////    {| "itemName": "x", "kind": "var", "parentName": "A.B.C" |}
 ////    export var x;
 ////}
 ////
-////{| "itemName": "A.B", "kind": "module" |}
+////{| "itemName": "A.B", "kind": "module", "parentName": "<global>" |}
 ////module A.B {
 ////    {| "itemName": "y", "kind": "var", "parentName": "A.B" |}
 ////    export var y;
 ////}
 ////
-////{| "itemName": "A", "kind": "module" |}
+////{| "itemName": "A", "kind": "module", "parentName": "<global>" |}
 ////module A {
 ////    {| "itemName": "z", "kind": "var", "parentName": "A" |}
 ////    export var z;
 ////}
 ////
-////{| "itemName": "A", "kind": "module" |}
+////{| "itemName": "A", "kind": "module", "parentName": "<global>" |}
 ////module A {
-////    {| "itemName": "B", "kind": "module", "parentName": "" |}
+////    {| "itemName": "B", "kind": "module", "parentName": "A" |}
 ////    module B {
-////        {| "itemName": "C", "kind": "module", "parentName": "" |}
+////        {| "itemName": "C", "kind": "module", "parentName": "B" |}
 ////        module C {
 ////            {| "itemName": "x", "kind": "var", "parentName": "C" |}
 ////            declare var x;
@@ -45,4 +46,4 @@ test.markers().forEach((marker) => {
 /// We have 8 module keywords, and 4 var keywords.
 /// The declarations of A.B.C.x do not get merged, so the 4 vars are independent.
 /// The two 'A' modules, however, do get merged, so in reality we have 7 modules.
-verify.navigationBarCount(11);
+verify.navigationBarCount(19);
diff --git a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
index 8856c4c044a..fc6eeb4dcec 100644
--- a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
+++ b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
@@ -1,13 +1,13 @@
 
-////{| "itemName": "\"Multiline\\r\\nMadness\"", "kind": "module" |}
+////{| "itemName": "\"Multiline\\r\\nMadness\"", "kind": "module", "parentName": "<global>" |}
 ////declare module "Multiline\r\nMadness" {
 ////}
 ////
-////{| "itemName": "\"Multiline\\\nMadness\"", "kind": "module" |}
+////{| "itemName": "\"Multiline\\\nMadness\"", "kind": "module", "parentName": "<global>" |}
 ////declare module "Multiline\
 ////Madness" {
 ////}
-////{| "itemName": "\"MultilineMadness\"", "kind": "module" |}
+////{| "itemName": "\"MultilineMadness\"", "kind": "module", "parentName": "<global>" |}
 ////declare module "MultilineMadness" {}
 ////
 ////{| "itemName": "Foo", "kind": "interface" |}
@@ -38,4 +38,4 @@ test.markers().forEach((marker) => {
     verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
 });
 
-verify.navigationBarCount(9); // interface w/ 2 properties, class w/ 2 properties, 3 modules
\ No newline at end of file
+verify.navigationBarCount(13);
\ No newline at end of file
diff --git a/tests/cases/fourslash/server/navbar01.ts b/tests/cases/fourslash/server/navbar01.ts
index e4e2b699be5..79b0dd3c1ab 100644
--- a/tests/cases/fourslash/server/navbar01.ts
+++ b/tests/cases/fourslash/server/navbar01.ts
@@ -10,7 +10,7 @@
 ////}
 ////
 /////// Module
-////{| "itemName": "Shapes", "kind": "module", "parentName": "" |}module Shapes {
+////{| "itemName": "Shapes", "kind": "module", "parentName": "<global>" |}module Shapes {
 ////
 ////    // Class
 ////    {| "itemName": "Point", "kind": "class", "parentName": "" |}export class Point implements IPoint {
@@ -49,4 +49,4 @@ test.markers().forEach((marker) => {
     }
 });
 
-verify.navigationBarCount(24);
+verify.navigationBarCount(25);

From c707e80463fa1bf7f39493c17c7731d29e53ee02 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 25 May 2016 07:59:26 -0700
Subject: [PATCH 084/332] Show indent and childItems when debugging the
 navigation bar

---
 src/harness/fourslash.ts | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index 7f2972e8125..4fd3161d1dc 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -1096,14 +1096,6 @@ namespace FourSlash {
             }
             addSpanInfoString();
             return resultString;
-
-            function repeatString(count: number, char: string) {
-                let result = "";
-                for (let i = 0; i < count; i++) {
-                    result += char;
-                }
-                return result;
-            }
         }
 
         public getBreakpointStatementLocation(pos: number) {
@@ -2055,7 +2047,7 @@ namespace FourSlash {
 
             for (let i = 0; i < length; i++) {
                 const item = items[i];
-                Harness.IO.log(`name: ${item.text}, kind: ${item.kind}`);
+                Harness.IO.log(`${repeatString(item.indent, " ")}name: ${item.text}, kind: ${item.kind}, childItems: ${item.childItems.map(child => child.text)}`);
             }
         }
 
@@ -2742,6 +2734,14 @@ ${code}
             fileName: fileName
         };
     }
+
+    function repeatString(count: number, char: string) {
+        let result = "";
+        for (let i = 0; i < count; i++) {
+            result += char;
+        }
+        return result;
+    }
 }
 
 namespace FourSlashInterface {

From c4b517ce450b72ee3bfcbe67dd46740079f689fe Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Wed, 25 May 2016 09:42:59 -0700
Subject: [PATCH 085/332] run linter once after last worker is finished in case
 if there are no errors

---
 Jakefile.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Jakefile.js b/Jakefile.js
index 7cf6e67bb06..59d9b690210 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -741,7 +741,8 @@ function runConsoleTests(defaultReporter, defaultSubsets) {
 
             deleteTemporaryProjectOutput();
             if (counter !== 0 || errorStatus === undefined) {
-                if (lintFlag) {
+                // run linter when last worker is finished
+                if (lintFlag && counter === 0) {
                     var lint = jake.Task['lint'];
                     lint.addListener('complete', function () {
                         complete();

From 34e85600700d0cc61e2500c524e007cd86574c91 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Wed, 25 May 2016 10:11:54 -0700
Subject: [PATCH 086/332] Fix broken baselines

---
 src/compiler/checker.ts                       | 22 ++++++++++---------
 ...nterfaceMergeConflictingMembers.errors.txt | 16 +++++++-------
 ...ssibilityModifiersOnParameters2.errors.txt | 19 +++++++++++-----
 ...constructorParameterProperties2.errors.txt | 16 +++++++-------
 ...duplicateIdentifierComputedName.errors.txt |  4 ++--
 ...ateIdentifierDifferentModifiers.errors.txt | 16 +++++++-------
 .../reference/numericClassMembers1.errors.txt |  8 +++----
 .../numericNamedPropertyDuplicates.errors.txt |  4 ++--
 ...cStringNamedPropertyEquivalence.errors.txt |  4 ++--
 ...ypeWithDuplicateNumericProperty.errors.txt | 12 +++++-----
 .../optionalPropertiesSyntax.errors.txt       |  8 +++----
 ...parameterPropertyInConstructor2.errors.txt |  5 ++++-
 .../stringNamedPropertyDuplicates.errors.txt  |  8 +++----
 .../reference/symbolProperty44.errors.txt     |  5 +----
 14 files changed, 79 insertions(+), 68 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 3e8066865ac..eb6fa4240a4 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -12972,18 +12972,20 @@ namespace ts {
                     const names = static ? staticNames : instanceNames;
 
                     const memberName = member.name && getPropertyNameForPropertyNameNode(member.name);
-                    switch (member.kind) {
-                        case SyntaxKind.GetAccessor:
-                            addName(names, member.name, memberName, getter);
-                            break;
+                    if (memberName) {
+                        switch (member.kind) {
+                            case SyntaxKind.GetAccessor:
+                                addName(names, member.name, memberName, getter);
+                                break;
 
-                        case SyntaxKind.SetAccessor:
-                            addName(names, member.name, memberName, setter);
-                            break;
+                            case SyntaxKind.SetAccessor:
+                                addName(names, member.name, memberName, setter);
+                                break;
 
-                        case SyntaxKind.PropertyDeclaration:
-                            addName(names, member.name, memberName, property);
-                            break;
+                            case SyntaxKind.PropertyDeclaration:
+                                addName(names, member.name, memberName, property);
+                                break;
+                        }
                     }
                 }
             }
diff --git a/tests/baselines/reference/classAndInterfaceMergeConflictingMembers.errors.txt b/tests/baselines/reference/classAndInterfaceMergeConflictingMembers.errors.txt
index a28471a3f91..8b3fa5bba55 100644
--- a/tests/baselines/reference/classAndInterfaceMergeConflictingMembers.errors.txt
+++ b/tests/baselines/reference/classAndInterfaceMergeConflictingMembers.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(10,15): error TS2686: All declarations of 'x' must have identical modifiers.
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(14,5): error TS2686: All declarations of 'x' must have identical modifiers.
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(18,13): error TS2686: All declarations of 'x' must have identical modifiers.
-tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(22,5): error TS2686: All declarations of 'x' must have identical modifiers.
+tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(10,15): error TS2687: All declarations of 'x' must have identical modifiers.
+tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(14,5): error TS2687: All declarations of 'x' must have identical modifiers.
+tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(18,13): error TS2687: All declarations of 'x' must have identical modifiers.
+tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts(22,5): error TS2687: All declarations of 'x' must have identical modifiers.
 
 
 ==== tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflictingMembers.ts (4 errors) ====
@@ -16,23 +16,23 @@ tests/cases/conformance/classes/classDeclarations/classAndInterfaceMergeConflict
     declare class C2 {
         protected x : number;
                   ~
-!!! error TS2686: All declarations of 'x' must have identical modifiers.
+!!! error TS2687: All declarations of 'x' must have identical modifiers.
     }
     
     interface C2 {
         x : number;
         ~
-!!! error TS2686: All declarations of 'x' must have identical modifiers.
+!!! error TS2687: All declarations of 'x' must have identical modifiers.
     }
     
     declare class C3 {
         private x : number;
                 ~
-!!! error TS2686: All declarations of 'x' must have identical modifiers.
+!!! error TS2687: All declarations of 'x' must have identical modifiers.
     }
     
     interface C3 {
         x : number;
         ~
-!!! error TS2686: All declarations of 'x' must have identical modifiers.
+!!! error TS2687: All declarations of 'x' must have identical modifiers.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/constructSignatureWithAccessibilityModifiersOnParameters2.errors.txt b/tests/baselines/reference/constructSignatureWithAccessibilityModifiersOnParameters2.errors.txt
index 1bc487189d3..78ef601af23 100644
--- a/tests/baselines/reference/constructSignatureWithAccessibilityModifiersOnParameters2.errors.txt
+++ b/tests/baselines/reference/constructSignatureWithAccessibilityModifiersOnParameters2.errors.txt
@@ -1,8 +1,11 @@
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(4,17): error TS2369: A parameter property is only allowed in a constructor implementation.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(4,27): error TS2369: A parameter property is only allowed in a constructor implementation.
+tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(5,24): error TS2300: Duplicate identifier 'x'.
+tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(5,35): error TS2300: Duplicate identifier 'y'.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(9,17): error TS2369: A parameter property is only allowed in a constructor implementation.
-tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(9,25): error TS2686: All declarations of 'x' must have identical modifiers.
-tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(10,24): error TS2686: All declarations of 'x' must have identical modifiers.
+tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(9,25): error TS2687: All declarations of 'x' must have identical modifiers.
+tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(10,24): error TS2300: Duplicate identifier 'x'.
+tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(10,24): error TS2687: All declarations of 'x' must have identical modifiers.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(14,17): error TS2369: A parameter property is only allowed in a constructor implementation.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(19,10): error TS2369: A parameter property is only allowed in a constructor implementation.
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(20,10): error TS2369: A parameter property is only allowed in a constructor implementation.
@@ -14,7 +17,7 @@ tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatur
 tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts(35,10): error TS2369: A parameter property is only allowed in a constructor implementation.
 
 
-==== tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts (14 errors) ====
+==== tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatureWithAccessibilityModifiersOnParameters2.ts (17 errors) ====
     // Parameter properties are not valid in overloads of constructors
     
     class C {
@@ -24,6 +27,10 @@ tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatur
                               ~~~~~~~~~
 !!! error TS2369: A parameter property is only allowed in a constructor implementation.
         constructor(public x, private y) { }
+                           ~
+!!! error TS2300: Duplicate identifier 'x'.
+                                      ~
+!!! error TS2300: Duplicate identifier 'y'.
     }
     
     class C2 {
@@ -31,10 +38,12 @@ tests/cases/conformance/types/objectTypeLiteral/callSignatures/constructSignatur
                     ~~~~~~~~~
 !!! error TS2369: A parameter property is only allowed in a constructor implementation.
                             ~
-!!! error TS2686: All declarations of 'x' must have identical modifiers.
+!!! error TS2687: All declarations of 'x' must have identical modifiers.
         constructor(public x) { }
                            ~
-!!! error TS2686: All declarations of 'x' must have identical modifiers.
+!!! error TS2300: Duplicate identifier 'x'.
+                           ~
+!!! error TS2687: All declarations of 'x' must have identical modifiers.
     }
     
     class C3 {
diff --git a/tests/baselines/reference/constructorParameterProperties2.errors.txt b/tests/baselines/reference/constructorParameterProperties2.errors.txt
index 409660c3133..7058b39bcca 100644
--- a/tests/baselines/reference/constructorParameterProperties2.errors.txt
+++ b/tests/baselines/reference/constructorParameterProperties2.errors.txt
@@ -1,10 +1,10 @@
 tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(11,24): error TS2300: Duplicate identifier 'y'.
-tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(18,5): error TS2686: All declarations of 'y' must have identical modifiers.
+tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(18,5): error TS2687: All declarations of 'y' must have identical modifiers.
 tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(19,25): error TS2300: Duplicate identifier 'y'.
-tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(19,25): error TS2686: All declarations of 'y' must have identical modifiers.
-tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(26,5): error TS2686: All declarations of 'y' must have identical modifiers.
+tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(19,25): error TS2687: All declarations of 'y' must have identical modifiers.
+tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(26,5): error TS2687: All declarations of 'y' must have identical modifiers.
 tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(27,27): error TS2300: Duplicate identifier 'y'.
-tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(27,27): error TS2686: All declarations of 'y' must have identical modifiers.
+tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts(27,27): error TS2687: All declarations of 'y' must have identical modifiers.
 
 
 ==== tests/cases/conformance/classes/constructorDeclarations/constructorParameters/constructorParameterProperties2.ts (7 errors) ====
@@ -29,12 +29,12 @@ tests/cases/conformance/classes/constructorDeclarations/constructorParameters/co
     class E {
         y: number;
         ~
-!!! error TS2686: All declarations of 'y' must have identical modifiers.
+!!! error TS2687: All declarations of 'y' must have identical modifiers.
         constructor(private y: number) { } // error
                             ~
 !!! error TS2300: Duplicate identifier 'y'.
                             ~
-!!! error TS2686: All declarations of 'y' must have identical modifiers.
+!!! error TS2687: All declarations of 'y' must have identical modifiers.
     }
     
     var e: E;
@@ -43,12 +43,12 @@ tests/cases/conformance/classes/constructorDeclarations/constructorParameters/co
     class F {
         y: number;
         ~
-!!! error TS2686: All declarations of 'y' must have identical modifiers.
+!!! error TS2687: All declarations of 'y' must have identical modifiers.
         constructor(protected y: number) { } // error
                               ~
 !!! error TS2300: Duplicate identifier 'y'.
                               ~
-!!! error TS2686: All declarations of 'y' must have identical modifiers.
+!!! error TS2687: All declarations of 'y' must have identical modifiers.
     }
     
     var f: F;
diff --git a/tests/baselines/reference/duplicateIdentifierComputedName.errors.txt b/tests/baselines/reference/duplicateIdentifierComputedName.errors.txt
index faef1106c41..12d70ca5458 100644
--- a/tests/baselines/reference/duplicateIdentifierComputedName.errors.txt
+++ b/tests/baselines/reference/duplicateIdentifierComputedName.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/duplicateIdentifierComputedName.ts(3,5): error TS2300: Duplicate identifier 'a'.
+tests/cases/compiler/duplicateIdentifierComputedName.ts(3,5): error TS2300: Duplicate identifier '["a"]'.
 
 
 ==== tests/cases/compiler/duplicateIdentifierComputedName.ts (1 errors) ====
@@ -6,6 +6,6 @@ tests/cases/compiler/duplicateIdentifierComputedName.ts(3,5): error TS2300: Dupl
         ["a"]: string;
         ["a"]: string;
         ~~~~~
-!!! error TS2300: Duplicate identifier 'a'.
+!!! error TS2300: Duplicate identifier '["a"]'.
     }
     
\ No newline at end of file
diff --git a/tests/baselines/reference/duplicateIdentifierDifferentModifiers.errors.txt b/tests/baselines/reference/duplicateIdentifierDifferentModifiers.errors.txt
index c25609bfa42..efb10e3d399 100644
--- a/tests/baselines/reference/duplicateIdentifierDifferentModifiers.errors.txt
+++ b/tests/baselines/reference/duplicateIdentifierDifferentModifiers.errors.txt
@@ -1,17 +1,17 @@
-tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts(2,15): error TS2686: All declarations of 'x' must have identical modifiers.
-tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts(3,15): error TS2686: All declarations of 'x' must have identical modifiers.
-tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts(16,11): error TS2686: All declarations of 'y' must have identical modifiers.
-tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts(20,3): error TS2686: All declarations of 'y' must have identical modifiers.
+tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts(2,15): error TS2687: All declarations of 'x' must have identical modifiers.
+tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts(3,15): error TS2687: All declarations of 'x' must have identical modifiers.
+tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts(16,11): error TS2687: All declarations of 'y' must have identical modifiers.
+tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts(20,3): error TS2687: All declarations of 'y' must have identical modifiers.
 
 
 ==== tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts (4 errors) ====
     // Not OK
     interface B { x; }
                   ~
-!!! error TS2686: All declarations of 'x' must have identical modifiers.
+!!! error TS2687: All declarations of 'x' must have identical modifiers.
     interface B { x?; }
                   ~
-!!! error TS2686: All declarations of 'x' must have identical modifiers.
+!!! error TS2687: All declarations of 'x' must have identical modifiers.
     
     // OK
     class A {
@@ -26,12 +26,12 @@ tests/cases/compiler/duplicateIdentifierDifferentModifiers.ts(20,3): error TS268
     class C {
       private y: string;
               ~
-!!! error TS2686: All declarations of 'y' must have identical modifiers.
+!!! error TS2687: All declarations of 'y' must have identical modifiers.
     }
     
     interface C {
       y: string;
       ~
-!!! error TS2686: All declarations of 'y' must have identical modifiers.
+!!! error TS2687: All declarations of 'y' must have identical modifiers.
     }
     
\ No newline at end of file
diff --git a/tests/baselines/reference/numericClassMembers1.errors.txt b/tests/baselines/reference/numericClassMembers1.errors.txt
index 7c99932e937..28c06a6fcf5 100644
--- a/tests/baselines/reference/numericClassMembers1.errors.txt
+++ b/tests/baselines/reference/numericClassMembers1.errors.txt
@@ -1,5 +1,5 @@
-tests/cases/compiler/numericClassMembers1.ts(3,3): error TS2300: Duplicate identifier '0'.
-tests/cases/compiler/numericClassMembers1.ts(8,2): error TS2300: Duplicate identifier '0'.
+tests/cases/compiler/numericClassMembers1.ts(3,3): error TS2300: Duplicate identifier '0.0'.
+tests/cases/compiler/numericClassMembers1.ts(8,2): error TS2300: Duplicate identifier ''0''.
 
 
 ==== tests/cases/compiler/numericClassMembers1.ts (2 errors) ====
@@ -7,14 +7,14 @@ tests/cases/compiler/numericClassMembers1.ts(8,2): error TS2300: Duplicate ident
       0 = 1; 
       0.0 = 2;
       ~~~
-!!! error TS2300: Duplicate identifier '0'.
+!!! error TS2300: Duplicate identifier '0.0'.
     }
      
     class C235 { 
       0.0 = 1;
      '0' = 2;
      ~~~
-!!! error TS2300: Duplicate identifier '0'.
+!!! error TS2300: Duplicate identifier ''0''.
     }
     
     class C236 {
diff --git a/tests/baselines/reference/numericNamedPropertyDuplicates.errors.txt b/tests/baselines/reference/numericNamedPropertyDuplicates.errors.txt
index 24801f2847a..5fb05297f11 100644
--- a/tests/baselines/reference/numericNamedPropertyDuplicates.errors.txt
+++ b/tests/baselines/reference/numericNamedPropertyDuplicates.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(3,5): error TS2300: Duplicate identifier '1'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(3,5): error TS2300: Duplicate identifier '1.0'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(5,12): error TS2300: Duplicate identifier '2'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(9,5): error TS2300: Duplicate identifier '2'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedPropertyDuplicates.ts(10,5): error TS2300: Duplicate identifier '2'.
@@ -12,7 +12,7 @@ tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericNamedP
         1: number;
         1.0: number;
         ~~~
-!!! error TS2300: Duplicate identifier '1'.
+!!! error TS2300: Duplicate identifier '1.0'.
         static 2: number;
         static 2: number;
                ~
diff --git a/tests/baselines/reference/numericStringNamedPropertyEquivalence.errors.txt b/tests/baselines/reference/numericStringNamedPropertyEquivalence.errors.txt
index 359a45ded51..102a6a07836 100644
--- a/tests/baselines/reference/numericStringNamedPropertyEquivalence.errors.txt
+++ b/tests/baselines/reference/numericStringNamedPropertyEquivalence.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(6,5): error TS2300: Duplicate identifier '1'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(6,5): error TS2300: Duplicate identifier '1.0'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(10,5): error TS2300: Duplicate identifier '1'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(12,5): error TS2300: Duplicate identifier '1'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericStringNamedPropertyEquivalence.ts(16,5): error TS2300: Duplicate identifier '1'.
@@ -15,7 +15,7 @@ tests/cases/conformance/types/objectTypeLiteral/propertySignatures/numericString
         "1.0": number; // not a duplicate
         1.0: number;
         ~~~
-!!! error TS2300: Duplicate identifier '1'.
+!!! error TS2300: Duplicate identifier '1.0'.
     }
     
     interface I {
diff --git a/tests/baselines/reference/objectTypeWithDuplicateNumericProperty.errors.txt b/tests/baselines/reference/objectTypeWithDuplicateNumericProperty.errors.txt
index 0565bf884e0..80931650d0a 100644
--- a/tests/baselines/reference/objectTypeWithDuplicateNumericProperty.errors.txt
+++ b/tests/baselines/reference/objectTypeWithDuplicateNumericProperty.errors.txt
@@ -1,6 +1,6 @@
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(6,5): error TS2300: Duplicate identifier '1'.
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(7,5): error TS2300: Duplicate identifier '1'.
-tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(8,5): error TS2300: Duplicate identifier '1'.
+tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(6,5): error TS2300: Duplicate identifier '1.0'.
+tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(7,5): error TS2300: Duplicate identifier '1.'.
+tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(8,5): error TS2300: Duplicate identifier '1.00'.
 tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(12,5): error TS2300: Duplicate identifier '1'.
 tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(13,5): error TS2300: Duplicate identifier '1'.
 tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(14,5): error TS2300: Duplicate identifier '1'.
@@ -22,13 +22,13 @@ tests/cases/conformance/types/members/objectTypeWithDuplicateNumericProperty.ts(
         1;
         1.0;
         ~~~
-!!! error TS2300: Duplicate identifier '1'.
+!!! error TS2300: Duplicate identifier '1.0'.
         1.;
         ~~
-!!! error TS2300: Duplicate identifier '1'.
+!!! error TS2300: Duplicate identifier '1.'.
         1.00;
         ~~~~
-!!! error TS2300: Duplicate identifier '1'.
+!!! error TS2300: Duplicate identifier '1.00'.
     }
     
     interface I {
diff --git a/tests/baselines/reference/optionalPropertiesSyntax.errors.txt b/tests/baselines/reference/optionalPropertiesSyntax.errors.txt
index 51e49e048d5..e7cc8742127 100644
--- a/tests/baselines/reference/optionalPropertiesSyntax.errors.txt
+++ b/tests/baselines/reference/optionalPropertiesSyntax.errors.txt
@@ -5,9 +5,9 @@ tests/cases/compiler/optionalPropertiesSyntax.ts(12,5): error TS1131: Property o
 tests/cases/compiler/optionalPropertiesSyntax.ts(18,11): error TS1005: ';' expected.
 tests/cases/compiler/optionalPropertiesSyntax.ts(18,12): error TS1131: Property or signature expected.
 tests/cases/compiler/optionalPropertiesSyntax.ts(24,5): error TS2300: Duplicate identifier 'prop'.
-tests/cases/compiler/optionalPropertiesSyntax.ts(24,5): error TS2686: All declarations of 'prop' must have identical modifiers.
+tests/cases/compiler/optionalPropertiesSyntax.ts(24,5): error TS2687: All declarations of 'prop' must have identical modifiers.
 tests/cases/compiler/optionalPropertiesSyntax.ts(25,5): error TS2300: Duplicate identifier 'prop'.
-tests/cases/compiler/optionalPropertiesSyntax.ts(25,5): error TS2686: All declarations of 'prop' must have identical modifiers.
+tests/cases/compiler/optionalPropertiesSyntax.ts(25,5): error TS2687: All declarations of 'prop' must have identical modifiers.
 tests/cases/compiler/optionalPropertiesSyntax.ts(32,5): error TS2375: Duplicate number index signature.
 tests/cases/compiler/optionalPropertiesSyntax.ts(32,18): error TS1005: ';' expected.
 tests/cases/compiler/optionalPropertiesSyntax.ts(32,19): error TS1131: Property or signature expected.
@@ -56,12 +56,12 @@ tests/cases/compiler/optionalPropertiesSyntax.ts(34,5): error TS2375: Duplicate
         ~~~~
 !!! error TS2300: Duplicate identifier 'prop'.
         ~~~~
-!!! error TS2686: All declarations of 'prop' must have identical modifiers.
+!!! error TS2687: All declarations of 'prop' must have identical modifiers.
         prop?: any;
         ~~~~
 !!! error TS2300: Duplicate identifier 'prop'.
         ~~~~
-!!! error TS2686: All declarations of 'prop' must have identical modifiers.
+!!! error TS2687: All declarations of 'prop' must have identical modifiers.
         prop2?: any;
     }
     
diff --git a/tests/baselines/reference/parameterPropertyInConstructor2.errors.txt b/tests/baselines/reference/parameterPropertyInConstructor2.errors.txt
index a99db2a39ad..d1a0513c1f6 100644
--- a/tests/baselines/reference/parameterPropertyInConstructor2.errors.txt
+++ b/tests/baselines/reference/parameterPropertyInConstructor2.errors.txt
@@ -1,8 +1,9 @@
 tests/cases/compiler/parameterPropertyInConstructor2.ts(3,5): error TS2394: Overload signature is not compatible with function implementation.
 tests/cases/compiler/parameterPropertyInConstructor2.ts(3,17): error TS2369: A parameter property is only allowed in a constructor implementation.
+tests/cases/compiler/parameterPropertyInConstructor2.ts(4,24): error TS2300: Duplicate identifier 'names'.
 
 
-==== tests/cases/compiler/parameterPropertyInConstructor2.ts (2 errors) ====
+==== tests/cases/compiler/parameterPropertyInConstructor2.ts (3 errors) ====
     module mod {
       class Customers {
         constructor(public names: string);
@@ -11,6 +12,8 @@ tests/cases/compiler/parameterPropertyInConstructor2.ts(3,17): error TS2369: A p
                     ~~~~~~~~~~~~~~~~~~~~
 !!! error TS2369: A parameter property is only allowed in a constructor implementation.
         constructor(public names: string, public ages: number) {
+                           ~~~~~
+!!! error TS2300: Duplicate identifier 'names'.
         }
       }
     }
diff --git a/tests/baselines/reference/stringNamedPropertyDuplicates.errors.txt b/tests/baselines/reference/stringNamedPropertyDuplicates.errors.txt
index f6ae46d9b28..5bd8a2771ba 100644
--- a/tests/baselines/reference/stringNamedPropertyDuplicates.errors.txt
+++ b/tests/baselines/reference/stringNamedPropertyDuplicates.errors.txt
@@ -1,5 +1,5 @@
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(3,5): error TS2300: Duplicate identifier 'a b'.
-tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(5,12): error TS2300: Duplicate identifier 'c d'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(3,5): error TS2300: Duplicate identifier '"a b"'.
+tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(5,12): error TS2300: Duplicate identifier '"c d"'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(9,5): error TS2300: Duplicate identifier 'a b'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(10,5): error TS2300: Duplicate identifier 'a b'.
 tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPropertyDuplicates.ts(14,5): error TS2300: Duplicate identifier 'a b'.
@@ -12,11 +12,11 @@ tests/cases/conformance/types/objectTypeLiteral/propertySignatures/stringNamedPr
         "a b": number;
         "a b": number;
         ~~~~~
-!!! error TS2300: Duplicate identifier 'a b'.
+!!! error TS2300: Duplicate identifier '"a b"'.
         static "c d": number;
         static "c d": number;
                ~~~~~
-!!! error TS2300: Duplicate identifier 'c d'.
+!!! error TS2300: Duplicate identifier '"c d"'.
     }
     
     interface I {
diff --git a/tests/baselines/reference/symbolProperty44.errors.txt b/tests/baselines/reference/symbolProperty44.errors.txt
index 984a20e9974..2cef480e736 100644
--- a/tests/baselines/reference/symbolProperty44.errors.txt
+++ b/tests/baselines/reference/symbolProperty44.errors.txt
@@ -1,9 +1,8 @@
 tests/cases/conformance/es6/Symbols/symbolProperty44.ts(2,9): error TS2300: Duplicate identifier '[Symbol.hasInstance]'.
 tests/cases/conformance/es6/Symbols/symbolProperty44.ts(5,9): error TS2300: Duplicate identifier '[Symbol.hasInstance]'.
-tests/cases/conformance/es6/Symbols/symbolProperty44.ts(5,9): error TS2300: Duplicate identifier '__@hasInstance'.
 
 
-==== tests/cases/conformance/es6/Symbols/symbolProperty44.ts (3 errors) ====
+==== tests/cases/conformance/es6/Symbols/symbolProperty44.ts (2 errors) ====
     class C {
         get [Symbol.hasInstance]() {
             ~~~~~~~~~~~~~~~~~~~~
@@ -13,8 +12,6 @@ tests/cases/conformance/es6/Symbols/symbolProperty44.ts(5,9): error TS2300: Dupl
         get [Symbol.hasInstance]() {
             ~~~~~~~~~~~~~~~~~~~~
 !!! error TS2300: Duplicate identifier '[Symbol.hasInstance]'.
-            ~~~~~~~~~~~~~~~~~~~~
-!!! error TS2300: Duplicate identifier '__@hasInstance'.
             return "";
         }
     }
\ No newline at end of file

From 642d6d540717e1ae8e5cd9650ac7ed48e883a21a Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Wed, 25 May 2016 10:12:16 -0700
Subject: [PATCH 087/332] Only allow excess numeric properties w/numeric
 indexers

Previously, having a numeric indexer on a target type meant that excess
object property checking would allow any property. Now only numeric
properties are allowed.
---
 src/compiler/checker.ts                          |  9 ++++++---
 .../objectLiteralExcessProperties.errors.txt     | 16 +++++++++++++++-
 .../reference/objectLiteralExcessProperties.js   |  6 ++++++
 .../compiler/objectLiteralExcessProperties.ts    |  4 ++++
 4 files changed, 31 insertions(+), 4 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 3e8066865ac..70db18b0f29 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -6034,11 +6034,14 @@ namespace ts {
             function isKnownProperty(type: Type, name: string): boolean {
                 if (type.flags & TypeFlags.ObjectType) {
                     const resolved = resolveStructuredTypeMembers(type);
-                    if ((relation === assignableRelation || relation === comparableRelation) &&
-                        (type === globalObjectType || isEmptyObjectType(resolved)) ||
-                        resolved.stringIndexInfo || resolved.numberIndexInfo || getPropertyOfType(type, name)) {
+                    if ((relation === assignableRelation || relation === comparableRelation) && (type === globalObjectType || isEmptyObjectType(resolved)) ||
+                        resolved.stringIndexInfo ||
+                        getPropertyOfType(type, name)) {
                         return true;
                     }
+                    if (resolved.numberIndexInfo) {
+                        return isNumericLiteralName(name);
+                    }
                 }
                 else if (type.flags & TypeFlags.UnionOrIntersection) {
                     for (const t of (<UnionOrIntersectionType>type).types) {
diff --git a/tests/baselines/reference/objectLiteralExcessProperties.errors.txt b/tests/baselines/reference/objectLiteralExcessProperties.errors.txt
index 84f635bf947..cfae572d6d2 100644
--- a/tests/baselines/reference/objectLiteralExcessProperties.errors.txt
+++ b/tests/baselines/reference/objectLiteralExcessProperties.errors.txt
@@ -15,9 +15,13 @@ tests/cases/compiler/objectLiteralExcessProperties.ts(19,57): error TS2322: Type
   Object literal may only specify known properties, and 'price' does not exist in type 'Book & Cover'.
 tests/cases/compiler/objectLiteralExcessProperties.ts(21,43): error TS2322: Type '{ foreword: string; price: number; }' is not assignable to type 'Book & number'.
   Object literal may only specify known properties, and 'price' does not exist in type 'Book & number'.
+tests/cases/compiler/objectLiteralExcessProperties.ts(23,29): error TS2322: Type '{ couleur: string; }' is not assignable to type 'Cover | Cover[]'.
+  Object literal may only specify known properties, and 'couleur' does not exist in type 'Cover | Cover[]'.
+tests/cases/compiler/objectLiteralExcessProperties.ts(25,27): error TS2322: Type '{ forewarned: string; }' is not assignable to type 'Book | Book[]'.
+  Object literal may only specify known properties, and 'forewarned' does not exist in type 'Book | Book[]'.
 
 
-==== tests/cases/compiler/objectLiteralExcessProperties.ts (7 errors) ====
+==== tests/cases/compiler/objectLiteralExcessProperties.ts (9 errors) ====
     interface Book {
         foreword: string;
     }
@@ -63,4 +67,14 @@ tests/cases/compiler/objectLiteralExcessProperties.ts(21,43): error TS2322: Type
                                               ~~~~~~~~~~~~
 !!! error TS2322: Type '{ foreword: string; price: number; }' is not assignable to type 'Book & number'.
 !!! error TS2322:   Object literal may only specify known properties, and 'price' does not exist in type 'Book & number'.
+    
+    var b8: Cover | Cover[] = { couleur : "non" };
+                                ~~~~~~~~~~~~~~~
+!!! error TS2322: Type '{ couleur: string; }' is not assignable to type 'Cover | Cover[]'.
+!!! error TS2322:   Object literal may only specify known properties, and 'couleur' does not exist in type 'Cover | Cover[]'.
+    
+    var b9: Book | Book[] = { forewarned: "still no" };
+                              ~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS2322: Type '{ forewarned: string; }' is not assignable to type 'Book | Book[]'.
+!!! error TS2322:   Object literal may only specify known properties, and 'forewarned' does not exist in type 'Book | Book[]'.
     
\ No newline at end of file
diff --git a/tests/baselines/reference/objectLiteralExcessProperties.js b/tests/baselines/reference/objectLiteralExcessProperties.js
index 747928ccb20..3515723b5f1 100644
--- a/tests/baselines/reference/objectLiteralExcessProperties.js
+++ b/tests/baselines/reference/objectLiteralExcessProperties.js
@@ -20,6 +20,10 @@ var b5: Book & Cover = { foreward: "hi", color: "blue" };
 var b6: Book & Cover = { foreword: "hi", color: "blue", price: 10.99 };
 
 var b7: Book & number = { foreword: "hi", price: 10.99 };
+
+var b8: Cover | Cover[] = { couleur : "non" };
+
+var b9: Book | Book[] = { forewarned: "still no" };
 
 
 //// [objectLiteralExcessProperties.js]
@@ -30,3 +34,5 @@ var b4 = { foreword: "hi", colour: "blue" };
 var b5 = { foreward: "hi", color: "blue" };
 var b6 = { foreword: "hi", color: "blue", price: 10.99 };
 var b7 = { foreword: "hi", price: 10.99 };
+var b8 = { couleur: "non" };
+var b9 = { forewarned: "still no" };
diff --git a/tests/cases/compiler/objectLiteralExcessProperties.ts b/tests/cases/compiler/objectLiteralExcessProperties.ts
index 0aa81703c33..7ed64d2d42c 100644
--- a/tests/cases/compiler/objectLiteralExcessProperties.ts
+++ b/tests/cases/compiler/objectLiteralExcessProperties.ts
@@ -19,3 +19,7 @@ var b5: Book & Cover = { foreward: "hi", color: "blue" };
 var b6: Book & Cover = { foreword: "hi", color: "blue", price: 10.99 };
 
 var b7: Book & number = { foreword: "hi", price: 10.99 };
+
+var b8: Cover | Cover[] = { couleur : "non" };
+
+var b9: Book | Book[] = { forewarned: "still no" };

From 5bfdf69fbf3a2bc6d026f59a8eae8e98d8d95dfa Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 25 May 2016 10:17:59 -0700
Subject: [PATCH 088/332] Remove comment

---
 src/services/navigationBar.ts | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index 53b1ca0b02c..8b5a7c5849e 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -320,7 +320,6 @@ namespace ts.NavigationBar {
                 case SyntaxKind.EnumMember:
                     return createItem(node, getTextOfNode((<EnumMember>node).name), ts.ScriptElementKind.memberVariableElement);
 
-                //move?
                 case SyntaxKind.ModuleDeclaration:
                     return createItem(node, getModuleName(<ModuleDeclaration>node), ts.ScriptElementKind.moduleElement);
 

From 89fb304eeede783031f15ea298cd4289bd533977 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Wed, 25 May 2016 10:18:49 -0700
Subject: [PATCH 089/332] Add test case for excess checking of numeric
 properties

---
 .../objectLiteralExcessProperties.errors.txt  | 19 ++++++++++++++++++-
 .../objectLiteralExcessProperties.js          | 10 ++++++++++
 .../compiler/objectLiteralExcessProperties.ts |  8 ++++++++
 3 files changed, 36 insertions(+), 1 deletion(-)

diff --git a/tests/baselines/reference/objectLiteralExcessProperties.errors.txt b/tests/baselines/reference/objectLiteralExcessProperties.errors.txt
index cfae572d6d2..b96b9b0c542 100644
--- a/tests/baselines/reference/objectLiteralExcessProperties.errors.txt
+++ b/tests/baselines/reference/objectLiteralExcessProperties.errors.txt
@@ -19,9 +19,13 @@ tests/cases/compiler/objectLiteralExcessProperties.ts(23,29): error TS2322: Type
   Object literal may only specify known properties, and 'couleur' does not exist in type 'Cover | Cover[]'.
 tests/cases/compiler/objectLiteralExcessProperties.ts(25,27): error TS2322: Type '{ forewarned: string; }' is not assignable to type 'Book | Book[]'.
   Object literal may only specify known properties, and 'forewarned' does not exist in type 'Book | Book[]'.
+tests/cases/compiler/objectLiteralExcessProperties.ts(33,27): error TS2322: Type '{ 0: { colour: string; }; }' is not assignable to type 'Indexed'.
+  Property '0' is incompatible with index signature.
+    Type '{ colour: string; }' is not assignable to type 'Cover'.
+      Object literal may only specify known properties, and 'colour' does not exist in type 'Cover'.
 
 
-==== tests/cases/compiler/objectLiteralExcessProperties.ts (9 errors) ====
+==== tests/cases/compiler/objectLiteralExcessProperties.ts (10 errors) ====
     interface Book {
         foreword: string;
     }
@@ -77,4 +81,17 @@ tests/cases/compiler/objectLiteralExcessProperties.ts(25,27): error TS2322: Type
                               ~~~~~~~~~~~~~~~~~~~~~~
 !!! error TS2322: Type '{ forewarned: string; }' is not assignable to type 'Book | Book[]'.
 !!! error TS2322:   Object literal may only specify known properties, and 'forewarned' does not exist in type 'Book | Book[]'.
+    
+    interface Indexed {
+        [n: number]: Cover;
+    }
+    
+    var b10: Indexed = { 0: { }, '1': { } }; // ok
+    
+    var b11: Indexed = { 0: { colour: "blue" } }; // nested object literal still errors
+                              ~~~~~~~~~~~~~~
+!!! error TS2322: Type '{ 0: { colour: string; }; }' is not assignable to type 'Indexed'.
+!!! error TS2322:   Property '0' is incompatible with index signature.
+!!! error TS2322:     Type '{ colour: string; }' is not assignable to type 'Cover'.
+!!! error TS2322:       Object literal may only specify known properties, and 'colour' does not exist in type 'Cover'.
     
\ No newline at end of file
diff --git a/tests/baselines/reference/objectLiteralExcessProperties.js b/tests/baselines/reference/objectLiteralExcessProperties.js
index 3515723b5f1..38186b19bf7 100644
--- a/tests/baselines/reference/objectLiteralExcessProperties.js
+++ b/tests/baselines/reference/objectLiteralExcessProperties.js
@@ -24,6 +24,14 @@ var b7: Book & number = { foreword: "hi", price: 10.99 };
 var b8: Cover | Cover[] = { couleur : "non" };
 
 var b9: Book | Book[] = { forewarned: "still no" };
+
+interface Indexed {
+    [n: number]: Cover;
+}
+
+var b10: Indexed = { 0: { }, '1': { } }; // ok
+
+var b11: Indexed = { 0: { colour: "blue" } }; // nested object literal still errors
 
 
 //// [objectLiteralExcessProperties.js]
@@ -36,3 +44,5 @@ var b6 = { foreword: "hi", color: "blue", price: 10.99 };
 var b7 = { foreword: "hi", price: 10.99 };
 var b8 = { couleur: "non" };
 var b9 = { forewarned: "still no" };
+var b10 = { 0: {}, '1': {} }; // ok
+var b11 = { 0: { colour: "blue" } }; // nested object literal still errors
diff --git a/tests/cases/compiler/objectLiteralExcessProperties.ts b/tests/cases/compiler/objectLiteralExcessProperties.ts
index 7ed64d2d42c..ca681b7b28e 100644
--- a/tests/cases/compiler/objectLiteralExcessProperties.ts
+++ b/tests/cases/compiler/objectLiteralExcessProperties.ts
@@ -23,3 +23,11 @@ var b7: Book & number = { foreword: "hi", price: 10.99 };
 var b8: Cover | Cover[] = { couleur : "non" };
 
 var b9: Book | Book[] = { forewarned: "still no" };
+
+interface Indexed {
+    [n: number]: Cover;
+}
+
+var b10: Indexed = { 0: { }, '1': { } }; // ok
+
+var b11: Indexed = { 0: { colour: "blue" } }; // nested object literal still errors

From a431a0b60bc8b55c674524da76e58253329d8c2f Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Wed, 25 May 2016 11:16:33 -0700
Subject: [PATCH 090/332] Improve intersection type inference

---
 src/compiler/checker.ts | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index eb6fa4240a4..5a7c6fa29e5 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7158,11 +7158,10 @@ namespace ts {
                             inferFromTypes(source, t);
                         }
                     }
-                    // Next, if target is a union type containing a single naked type parameter, make a
-                    // secondary inference to that type parameter. We don't do this for intersection types
-                    // because in a target type like Foo & T we don't know how which parts of the source type
-                    // should be matched by Foo and which should be inferred to T.
-                    if (target.flags & TypeFlags.Union && typeParameterCount === 1) {
+                    // Next, if target containings a single naked type parameter, make a secondary inference to that type
+                    // parameter. This gives meaningful results for union types in co-variant positions and intersection
+                    // types in contra-variant positions (such as callback parameters).
+                    if (typeParameterCount === 1) {
                         inferiority++;
                         inferFromTypes(source, typeParameter);
                         inferiority--;

From 6a27289b2ddc177589b4e44697a97126ca4e023b Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Wed, 25 May 2016 11:17:03 -0700
Subject: [PATCH 091/332] Add test

---
 .../reference/intersectionTypeInference1.js   | 17 ++++++++
 .../intersectionTypeInference1.symbols        | 33 +++++++++++++++
 .../intersectionTypeInference1.types          | 41 +++++++++++++++++++
 .../compiler/intersectionTypeInference1.ts    |  7 ++++
 4 files changed, 98 insertions(+)
 create mode 100644 tests/baselines/reference/intersectionTypeInference1.js
 create mode 100644 tests/baselines/reference/intersectionTypeInference1.symbols
 create mode 100644 tests/baselines/reference/intersectionTypeInference1.types
 create mode 100644 tests/cases/compiler/intersectionTypeInference1.ts

diff --git a/tests/baselines/reference/intersectionTypeInference1.js b/tests/baselines/reference/intersectionTypeInference1.js
new file mode 100644
index 00000000000..f4ad4da608b
--- /dev/null
+++ b/tests/baselines/reference/intersectionTypeInference1.js
@@ -0,0 +1,17 @@
+//// [intersectionTypeInference1.ts]
+// Repro from #8801
+
+function alert(s: string) {}
+
+const parameterFn = (props:{store:string}) => alert(props.store)
+const brokenFunction = <OwnProps>(f: (p: {dispatch: number} & OwnProps) => void) => (o: OwnProps) => o
+export const Form3 = brokenFunction(parameterFn)({store: "hello"})
+
+
+//// [intersectionTypeInference1.js]
+// Repro from #8801
+"use strict";
+function alert(s) { }
+var parameterFn = function (props) { return alert(props.store); };
+var brokenFunction = function (f) { return function (o) { return o; }; };
+exports.Form3 = brokenFunction(parameterFn)({ store: "hello" });
diff --git a/tests/baselines/reference/intersectionTypeInference1.symbols b/tests/baselines/reference/intersectionTypeInference1.symbols
new file mode 100644
index 00000000000..f45d4fbd5b8
--- /dev/null
+++ b/tests/baselines/reference/intersectionTypeInference1.symbols
@@ -0,0 +1,33 @@
+=== tests/cases/compiler/intersectionTypeInference1.ts ===
+// Repro from #8801
+
+function alert(s: string) {}
+>alert : Symbol(alert, Decl(intersectionTypeInference1.ts, 0, 0))
+>s : Symbol(s, Decl(intersectionTypeInference1.ts, 2, 15))
+
+const parameterFn = (props:{store:string}) => alert(props.store)
+>parameterFn : Symbol(parameterFn, Decl(intersectionTypeInference1.ts, 4, 5))
+>props : Symbol(props, Decl(intersectionTypeInference1.ts, 4, 21))
+>store : Symbol(store, Decl(intersectionTypeInference1.ts, 4, 28))
+>alert : Symbol(alert, Decl(intersectionTypeInference1.ts, 0, 0))
+>props.store : Symbol(store, Decl(intersectionTypeInference1.ts, 4, 28))
+>props : Symbol(props, Decl(intersectionTypeInference1.ts, 4, 21))
+>store : Symbol(store, Decl(intersectionTypeInference1.ts, 4, 28))
+
+const brokenFunction = <OwnProps>(f: (p: {dispatch: number} & OwnProps) => void) => (o: OwnProps) => o
+>brokenFunction : Symbol(brokenFunction, Decl(intersectionTypeInference1.ts, 5, 5))
+>OwnProps : Symbol(OwnProps, Decl(intersectionTypeInference1.ts, 5, 24))
+>f : Symbol(f, Decl(intersectionTypeInference1.ts, 5, 34))
+>p : Symbol(p, Decl(intersectionTypeInference1.ts, 5, 38))
+>dispatch : Symbol(dispatch, Decl(intersectionTypeInference1.ts, 5, 42))
+>OwnProps : Symbol(OwnProps, Decl(intersectionTypeInference1.ts, 5, 24))
+>o : Symbol(o, Decl(intersectionTypeInference1.ts, 5, 85))
+>OwnProps : Symbol(OwnProps, Decl(intersectionTypeInference1.ts, 5, 24))
+>o : Symbol(o, Decl(intersectionTypeInference1.ts, 5, 85))
+
+export const Form3 = brokenFunction(parameterFn)({store: "hello"})
+>Form3 : Symbol(Form3, Decl(intersectionTypeInference1.ts, 6, 12))
+>brokenFunction : Symbol(brokenFunction, Decl(intersectionTypeInference1.ts, 5, 5))
+>parameterFn : Symbol(parameterFn, Decl(intersectionTypeInference1.ts, 4, 5))
+>store : Symbol(store, Decl(intersectionTypeInference1.ts, 6, 50))
+
diff --git a/tests/baselines/reference/intersectionTypeInference1.types b/tests/baselines/reference/intersectionTypeInference1.types
new file mode 100644
index 00000000000..b74b2d2a453
--- /dev/null
+++ b/tests/baselines/reference/intersectionTypeInference1.types
@@ -0,0 +1,41 @@
+=== tests/cases/compiler/intersectionTypeInference1.ts ===
+// Repro from #8801
+
+function alert(s: string) {}
+>alert : (s: string) => void
+>s : string
+
+const parameterFn = (props:{store:string}) => alert(props.store)
+>parameterFn : (props: { store: string; }) => void
+>(props:{store:string}) => alert(props.store) : (props: { store: string; }) => void
+>props : { store: string; }
+>store : string
+>alert(props.store) : void
+>alert : (s: string) => void
+>props.store : string
+>props : { store: string; }
+>store : string
+
+const brokenFunction = <OwnProps>(f: (p: {dispatch: number} & OwnProps) => void) => (o: OwnProps) => o
+>brokenFunction : <OwnProps>(f: (p: { dispatch: number; } & OwnProps) => void) => (o: OwnProps) => OwnProps
+><OwnProps>(f: (p: {dispatch: number} & OwnProps) => void) => (o: OwnProps) => o : <OwnProps>(f: (p: { dispatch: number; } & OwnProps) => void) => (o: OwnProps) => OwnProps
+>OwnProps : OwnProps
+>f : (p: { dispatch: number; } & OwnProps) => void
+>p : { dispatch: number; } & OwnProps
+>dispatch : number
+>OwnProps : OwnProps
+>(o: OwnProps) => o : (o: OwnProps) => OwnProps
+>o : OwnProps
+>OwnProps : OwnProps
+>o : OwnProps
+
+export const Form3 = brokenFunction(parameterFn)({store: "hello"})
+>Form3 : { store: string; }
+>brokenFunction(parameterFn)({store: "hello"}) : { store: string; }
+>brokenFunction(parameterFn) : (o: { store: string; }) => { store: string; }
+>brokenFunction : <OwnProps>(f: (p: { dispatch: number; } & OwnProps) => void) => (o: OwnProps) => OwnProps
+>parameterFn : (props: { store: string; }) => void
+>{store: "hello"} : { store: string; }
+>store : string
+>"hello" : string
+
diff --git a/tests/cases/compiler/intersectionTypeInference1.ts b/tests/cases/compiler/intersectionTypeInference1.ts
new file mode 100644
index 00000000000..c4d46800f0c
--- /dev/null
+++ b/tests/cases/compiler/intersectionTypeInference1.ts
@@ -0,0 +1,7 @@
+// Repro from #8801
+
+function alert(s: string) {}
+
+const parameterFn = (props:{store:string}) => alert(props.store)
+const brokenFunction = <OwnProps>(f: (p: {dispatch: number} & OwnProps) => void) => (o: OwnProps) => o
+export const Form3 = brokenFunction(parameterFn)({store: "hello"})

From 5138e8be8ea21317b62b082ca345695d37445502 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Wed, 25 May 2016 11:37:10 -0700
Subject: [PATCH 092/332] Correct tests and update baselines.

A lot of tests used non-numeric property names for object literals that
are contextually typed only by a numeric indexer.
---
 ...computedPropertyNamesContextualType7_ES5.js |  7 ++++---
 ...tedPropertyNamesContextualType7_ES5.symbols |  5 ++---
 ...putedPropertyNamesContextualType7_ES5.types |  8 ++++----
 ...computedPropertyNamesContextualType7_ES6.js |  7 ++++---
 ...tedPropertyNamesContextualType7_ES6.symbols |  5 ++---
 ...putedPropertyNamesContextualType7_ES6.types |  8 ++++----
 .../indexSignaturesInferentialTyping.js        | 10 ++++------
 .../indexSignaturesInferentialTyping.symbols   | 16 +++++-----------
 .../indexSignaturesInferentialTyping.types     | 18 ++++--------------
 ...erConstrainsPropertyDeclarations.errors.txt | 12 +++++-------
 ...rConstrainsPropertyDeclarations2.errors.txt | 12 +++++-------
 .../reference/numericIndexerConstraint4.js     |  5 +++--
 .../numericIndexerConstraint4.symbols          |  3 +--
 .../reference/numericIndexerConstraint4.types  |  5 ++---
 .../objectLitIndexerContextualType.errors.txt  | 12 +++++++++---
 .../objectLitIndexerContextualType.js          |  5 +++--
 .../objectTypesIdentityWithNumericIndexers1.js |  4 ++--
 ...ctTypesIdentityWithNumericIndexers1.symbols |  9 ++++-----
 ...jectTypesIdentityWithNumericIndexers1.types |  5 ++---
 .../objectTypesIdentityWithNumericIndexers2.js |  4 ++--
 ...ctTypesIdentityWithNumericIndexers2.symbols |  9 ++++-----
 ...jectTypesIdentityWithNumericIndexers2.types |  5 ++---
 .../objectTypesIdentityWithNumericIndexers3.js |  4 ++--
 ...ctTypesIdentityWithNumericIndexers3.symbols |  9 ++++-----
 ...jectTypesIdentityWithNumericIndexers3.types |  5 ++---
 .../reference/propertyAccess.errors.txt        |  7 ++++++-
 .../indexSignaturesInferentialTyping.ts        |  5 ++---
 .../compiler/numericIndexerConstraint4.ts      |  2 +-
 .../compiler/objectLitIndexerContextualType.ts |  4 ++--
 ...computedPropertyNamesContextualType7_ES5.ts |  4 ++--
 ...computedPropertyNamesContextualType7_ES6.ts |  4 ++--
 .../objectTypesIdentityWithNumericIndexers1.ts |  2 +-
 .../objectTypesIdentityWithNumericIndexers2.ts |  2 +-
 .../objectTypesIdentityWithNumericIndexers3.ts |  2 +-
 34 files changed, 103 insertions(+), 121 deletions(-)

diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.js b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.js
index 9ca7e826aa7..65cc057fa81 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.js
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.js
@@ -6,16 +6,17 @@ interface I<T> {
 declare function foo<T>(obj: I<T>): T
 
 foo({
-    p: "",
+    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
     [+"hi"]: [0]
-});
+});
+
 
 //// [computedPropertyNamesContextualType7_ES5.js]
 foo((_a = {
-        p: "",
+        101: "",
         0: function () { }
     },
     _a["hi" + "bye"] = true,
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.symbols b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.symbols
index 22e4cf2b45b..562b238cdac 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.symbols
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.symbols
@@ -19,11 +19,10 @@ declare function foo<T>(obj: I<T>): T
 foo({
 >foo : Symbol(foo, Decl(computedPropertyNamesContextualType7_ES5.ts, 2, 1))
 
-    p: "",
->p : Symbol(p, Decl(computedPropertyNamesContextualType7_ES5.ts, 6, 5))
-
+    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
     [+"hi"]: [0]
 });
+
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.types b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.types
index 083388ba975..53c8f805c57 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.types
@@ -17,12 +17,11 @@ declare function foo<T>(obj: I<T>): T
 >T : T
 
 foo({
->foo({    p: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]}) : (() => void) | number | number[]
+>foo({    101: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]}) : string | (() => void) | number | number[]
 >foo : <T>(obj: I<T>) => T
->{    p: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: string | (() => void) | boolean | number | number[]; [x: number]: (() => void) | number | number[]; 0: () => void; p: string; }
+>{    101: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: string | (() => void) | boolean | number | number[]; [x: number]: string | (() => void) | number | number[]; 0: () => void; 101: string; }
 
-    p: "",
->p : string
+    101: "",
 >"" : string
 
     0: () => { },
@@ -47,3 +46,4 @@ foo({
 >0 : number
 
 });
+
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.js b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.js
index 185ccd72ead..0b515dba7ca 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.js
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.js
@@ -6,16 +6,17 @@ interface I<T> {
 declare function foo<T>(obj: I<T>): T
 
 foo({
-    p: "",
+    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
     [+"hi"]: [0]
-});
+});
+
 
 //// [computedPropertyNamesContextualType7_ES6.js]
 foo({
-    p: "",
+    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.symbols b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.symbols
index 7f33ebf58ad..ca0c2f12a80 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.symbols
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.symbols
@@ -19,11 +19,10 @@ declare function foo<T>(obj: I<T>): T
 foo({
 >foo : Symbol(foo, Decl(computedPropertyNamesContextualType7_ES6.ts, 2, 1))
 
-    p: "",
->p : Symbol(p, Decl(computedPropertyNamesContextualType7_ES6.ts, 6, 5))
-
+    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
     [+"hi"]: [0]
 });
+
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.types b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.types
index bc6ae72fb4f..f2eefe7405e 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.types
@@ -17,12 +17,11 @@ declare function foo<T>(obj: I<T>): T
 >T : T
 
 foo({
->foo({    p: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]}) : (() => void) | number | number[]
+>foo({    101: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]}) : string | (() => void) | number | number[]
 >foo : <T>(obj: I<T>) => T
->{    p: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: string | (() => void) | boolean | number | number[]; [x: number]: (() => void) | number | number[]; 0: () => void; p: string; }
+>{    101: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: string | (() => void) | boolean | number | number[]; [x: number]: string | (() => void) | number | number[]; 0: () => void; 101: string; }
 
-    p: "",
->p : string
+    101: "",
 >"" : string
 
     0: () => { },
@@ -47,3 +46,4 @@ foo({
 >0 : number
 
 });
+
diff --git a/tests/baselines/reference/indexSignaturesInferentialTyping.js b/tests/baselines/reference/indexSignaturesInferentialTyping.js
index 53636be716c..b5255861a10 100644
--- a/tests/baselines/reference/indexSignaturesInferentialTyping.js
+++ b/tests/baselines/reference/indexSignaturesInferentialTyping.js
@@ -3,15 +3,13 @@ function foo<T>(items: { [index: number]: T }): T { return undefined; }
 function bar<T>(items: { [index: string]: T }): T { return undefined; }
 
 var x1 = foo({ 0: 0, 1: 1 });       // type should be number
-var x2 = foo({ zero: 0, one: 1 });
-var x3 = bar({ 0: 0, 1: 1 });
-var x4 = bar({ zero: 0, one: 1 });  // type should be number
+var x2 = bar({ 0: 0, 1: 1 });
+var x3 = bar({ zero: 0, one: 1 });  // type should be number
 
 
 //// [indexSignaturesInferentialTyping.js]
 function foo(items) { return undefined; }
 function bar(items) { return undefined; }
 var x1 = foo({ 0: 0, 1: 1 }); // type should be number
-var x2 = foo({ zero: 0, one: 1 });
-var x3 = bar({ 0: 0, 1: 1 });
-var x4 = bar({ zero: 0, one: 1 }); // type should be number
+var x2 = bar({ 0: 0, 1: 1 });
+var x3 = bar({ zero: 0, one: 1 }); // type should be number
diff --git a/tests/baselines/reference/indexSignaturesInferentialTyping.symbols b/tests/baselines/reference/indexSignaturesInferentialTyping.symbols
index a34aa7a5cd1..754fe0390a4 100644
--- a/tests/baselines/reference/indexSignaturesInferentialTyping.symbols
+++ b/tests/baselines/reference/indexSignaturesInferentialTyping.symbols
@@ -21,19 +21,13 @@ var x1 = foo({ 0: 0, 1: 1 });       // type should be number
 >x1 : Symbol(x1, Decl(indexSignaturesInferentialTyping.ts, 3, 3))
 >foo : Symbol(foo, Decl(indexSignaturesInferentialTyping.ts, 0, 0))
 
-var x2 = foo({ zero: 0, one: 1 });
+var x2 = bar({ 0: 0, 1: 1 });
 >x2 : Symbol(x2, Decl(indexSignaturesInferentialTyping.ts, 4, 3))
->foo : Symbol(foo, Decl(indexSignaturesInferentialTyping.ts, 0, 0))
->zero : Symbol(zero, Decl(indexSignaturesInferentialTyping.ts, 4, 14))
->one : Symbol(one, Decl(indexSignaturesInferentialTyping.ts, 4, 23))
+>bar : Symbol(bar, Decl(indexSignaturesInferentialTyping.ts, 0, 71))
 
-var x3 = bar({ 0: 0, 1: 1 });
+var x3 = bar({ zero: 0, one: 1 });  // type should be number
 >x3 : Symbol(x3, Decl(indexSignaturesInferentialTyping.ts, 5, 3))
 >bar : Symbol(bar, Decl(indexSignaturesInferentialTyping.ts, 0, 71))
-
-var x4 = bar({ zero: 0, one: 1 });  // type should be number
->x4 : Symbol(x4, Decl(indexSignaturesInferentialTyping.ts, 6, 3))
->bar : Symbol(bar, Decl(indexSignaturesInferentialTyping.ts, 0, 71))
->zero : Symbol(zero, Decl(indexSignaturesInferentialTyping.ts, 6, 14))
->one : Symbol(one, Decl(indexSignaturesInferentialTyping.ts, 6, 23))
+>zero : Symbol(zero, Decl(indexSignaturesInferentialTyping.ts, 5, 14))
+>one : Symbol(one, Decl(indexSignaturesInferentialTyping.ts, 5, 23))
 
diff --git a/tests/baselines/reference/indexSignaturesInferentialTyping.types b/tests/baselines/reference/indexSignaturesInferentialTyping.types
index 8545a7d4ca9..47c7aa21388 100644
--- a/tests/baselines/reference/indexSignaturesInferentialTyping.types
+++ b/tests/baselines/reference/indexSignaturesInferentialTyping.types
@@ -25,26 +25,16 @@ var x1 = foo({ 0: 0, 1: 1 });       // type should be number
 >0 : number
 >1 : number
 
-var x2 = foo({ zero: 0, one: 1 });
->x2 : {}
->foo({ zero: 0, one: 1 }) : {}
->foo : <T>(items: { [index: number]: T; }) => T
->{ zero: 0, one: 1 } : { zero: number; one: number; }
->zero : number
->0 : number
->one : number
->1 : number
-
-var x3 = bar({ 0: 0, 1: 1 });
->x3 : number
+var x2 = bar({ 0: 0, 1: 1 });
+>x2 : number
 >bar({ 0: 0, 1: 1 }) : number
 >bar : <T>(items: { [index: string]: T; }) => T
 >{ 0: 0, 1: 1 } : { 0: number; 1: number; }
 >0 : number
 >1 : number
 
-var x4 = bar({ zero: 0, one: 1 });  // type should be number
->x4 : number
+var x3 = bar({ zero: 0, one: 1 });  // type should be number
+>x3 : number
 >bar({ zero: 0, one: 1 }) : number
 >bar : <T>(items: { [index: string]: T; }) => T
 >{ zero: 0, one: 1 } : { zero: number; one: number; }
diff --git a/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt b/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt
index bb01b2fe125..ec0f330f1a3 100644
--- a/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt
+++ b/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations.errors.txt
@@ -5,9 +5,8 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerCo
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(36,16): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(50,5): error TS2412: Property '2.0' of type 'number' is not assignable to numeric index type 'string'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(68,5): error TS2412: Property '2.0' of type 'number' is not assignable to numeric index type 'string'.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(78,5): error TS2322: Type '{ 1.0: string; 2.0: number; a: string; b: number; c: () => void; "d": string; "e": number; "3.0": string; "4.0": number; f: any; X: string; foo(): string; }' is not assignable to type '{ [x: number]: string; }'.
-  Property '2.0' is incompatible with index signature.
-    Type 'number' is not assignable to type 'string'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(79,5): error TS2322: Type '{ 1.0: string; 2.0: number; a: string; b: number; c: () => void; "d": string; "e": number; "3.0": string; "4.0": number; f: any; X: string; foo(): string; }' is not assignable to type '{ [x: number]: string; }'.
+  Object literal may only specify known properties, and 'a' does not exist in type '{ [x: number]: string; }'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(88,9): error TS2304: Cannot find name 'Myn'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(90,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations.ts(93,9): error TS1056: Accessors are only available when targeting ECMAScript 5 and higher.
@@ -106,11 +105,10 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerCo
     
     // error
     var b: { [x: number]: string; } = {
-        ~
-!!! error TS2322: Type '{ 1.0: string; 2.0: number; a: string; b: number; c: () => void; "d": string; "e": number; "3.0": string; "4.0": number; f: any; X: string; foo(): string; }' is not assignable to type '{ [x: number]: string; }'.
-!!! error TS2322:   Property '2.0' is incompatible with index signature.
-!!! error TS2322:     Type 'number' is not assignable to type 'string'.
         a: '',
+        ~~~~~
+!!! error TS2322: Type '{ 1.0: string; 2.0: number; a: string; b: number; c: () => void; "d": string; "e": number; "3.0": string; "4.0": number; f: any; X: string; foo(): string; }' is not assignable to type '{ [x: number]: string; }'.
+!!! error TS2322:   Object literal may only specify known properties, and 'a' does not exist in type '{ [x: number]: string; }'.
         b: 1, 
         c: () => { }, 
         "d": '', 
diff --git a/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations2.errors.txt b/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations2.errors.txt
index 332b356c732..e6d22ff0712 100644
--- a/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations2.errors.txt
+++ b/tests/baselines/reference/numericIndexerConstrainsPropertyDeclarations2.errors.txt
@@ -1,9 +1,8 @@
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts(16,5): error TS2412: Property '3.0' of type 'number' is not assignable to numeric index type 'A'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts(25,5): error TS2412: Property '3.0' of type 'number' is not assignable to numeric index type 'A'.
 tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts(34,5): error TS2412: Property '3.0' of type 'number' is not assignable to numeric index type 'A'.
-tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts(39,5): error TS2322: Type '{ 1.0: A; 2.0: B; 3.0: number; "2.5": B; "4.0": string; }' is not assignable to type '{ [x: number]: A; }'.
-  Property '3.0' is incompatible with index signature.
-    Type 'number' is not assignable to type 'A'.
+tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts(44,5): error TS2322: Type '{ 1.0: A; 2.0: B; 3.0: number; "2.5": B; "4.0": string; }' is not assignable to type '{ [x: number]: A; }'.
+  Object literal may only specify known properties, and '"4.0"' does not exist in type '{ [x: number]: A; }'.
 
 
 ==== tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerConstrainsPropertyDeclarations2.ts (4 errors) ====
@@ -52,13 +51,12 @@ tests/cases/conformance/types/objectTypeLiteral/indexSignatures/numericIndexerCo
     
     // error
     var b: { [x: number]: A } = {
-        ~
-!!! error TS2322: Type '{ 1.0: A; 2.0: B; 3.0: number; "2.5": B; "4.0": string; }' is not assignable to type '{ [x: number]: A; }'.
-!!! error TS2322:   Property '3.0' is incompatible with index signature.
-!!! error TS2322:     Type 'number' is not assignable to type 'A'.
         1.0: new A(), 
         2.0: new B(), 
         "2.5": new B(),
         3.0: 1,
         "4.0": ''
+        ~~~~~~~~~
+!!! error TS2322: Type '{ 1.0: A; 2.0: B; 3.0: number; "2.5": B; "4.0": string; }' is not assignable to type '{ [x: number]: A; }'.
+!!! error TS2322:   Object literal may only specify known properties, and '"4.0"' does not exist in type '{ [x: number]: A; }'.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/numericIndexerConstraint4.js b/tests/baselines/reference/numericIndexerConstraint4.js
index 245569cb62e..a9eace23833 100644
--- a/tests/baselines/reference/numericIndexerConstraint4.js
+++ b/tests/baselines/reference/numericIndexerConstraint4.js
@@ -9,7 +9,8 @@ class B extends A {
 
 var x: {
     [idx: number]: A;
-} = { data: new B() }
+} = { 0: new B() }
+
 
 //// [numericIndexerConstraint4.js]
 var __extends = (this && this.__extends) || function (d, b) {
@@ -29,4 +30,4 @@ var B = (function (_super) {
     }
     return B;
 }(A));
-var x = { data: new B() };
+var x = { 0: new B() };
diff --git a/tests/baselines/reference/numericIndexerConstraint4.symbols b/tests/baselines/reference/numericIndexerConstraint4.symbols
index 46301a6787b..8edf7d0f6fe 100644
--- a/tests/baselines/reference/numericIndexerConstraint4.symbols
+++ b/tests/baselines/reference/numericIndexerConstraint4.symbols
@@ -21,7 +21,6 @@ var x: {
 >idx : Symbol(idx, Decl(numericIndexerConstraint4.ts, 9, 5))
 >A : Symbol(A, Decl(numericIndexerConstraint4.ts, 0, 0))
 
-} = { data: new B() }
->data : Symbol(data, Decl(numericIndexerConstraint4.ts, 10, 5))
+} = { 0: new B() }
 >B : Symbol(B, Decl(numericIndexerConstraint4.ts, 2, 1))
 
diff --git a/tests/baselines/reference/numericIndexerConstraint4.types b/tests/baselines/reference/numericIndexerConstraint4.types
index c8af4d54a9a..c8cda0e6be2 100644
--- a/tests/baselines/reference/numericIndexerConstraint4.types
+++ b/tests/baselines/reference/numericIndexerConstraint4.types
@@ -21,9 +21,8 @@ var x: {
 >idx : number
 >A : A
 
-} = { data: new B() }
->{ data: new B() } : { data: B; }
->data : B
+} = { 0: new B() }
+>{ 0: new B() } : { 0: B; }
 >new B() : B
 >B : typeof B
 
diff --git a/tests/baselines/reference/objectLitIndexerContextualType.errors.txt b/tests/baselines/reference/objectLitIndexerContextualType.errors.txt
index ca65ee5a5be..5012dc11728 100644
--- a/tests/baselines/reference/objectLitIndexerContextualType.errors.txt
+++ b/tests/baselines/reference/objectLitIndexerContextualType.errors.txt
@@ -2,11 +2,13 @@ tests/cases/compiler/objectLitIndexerContextualType.ts(12,13): error TS2362: The
 tests/cases/compiler/objectLitIndexerContextualType.ts(12,17): error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 tests/cases/compiler/objectLitIndexerContextualType.ts(15,13): error TS2362: The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 tests/cases/compiler/objectLitIndexerContextualType.ts(15,17): error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
+tests/cases/compiler/objectLitIndexerContextualType.ts(18,5): error TS2322: Type '{ s: (t: any) => number; }' is not assignable to type 'J'.
+  Object literal may only specify known properties, and 's' does not exist in type 'J'.
 tests/cases/compiler/objectLitIndexerContextualType.ts(21,13): error TS2362: The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 tests/cases/compiler/objectLitIndexerContextualType.ts(21,17): error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
 
 
-==== tests/cases/compiler/objectLitIndexerContextualType.ts (6 errors) ====
+==== tests/cases/compiler/objectLitIndexerContextualType.ts (7 errors) ====
     interface I {
         [s: string]: (s: string) => number;
     }
@@ -32,7 +34,10 @@ tests/cases/compiler/objectLitIndexerContextualType.ts(21,17): error TS2363: The
 !!! error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
     };
     y = {
-        s: t => t * t, // Should not error
+        s: t => t * t, // Should error
+        ~~~~~~~~~~~~~
+!!! error TS2322: Type '{ s: (t: any) => number; }' is not assignable to type 'J'.
+!!! error TS2322:   Object literal may only specify known properties, and 's' does not exist in type 'J'.
     };
     y = {
         0: t => t * t, // Should error
@@ -40,4 +45,5 @@ tests/cases/compiler/objectLitIndexerContextualType.ts(21,17): error TS2363: The
 !!! error TS2362: The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
                     ~
 !!! error TS2363: The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type.
-    };
\ No newline at end of file
+    };
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/objectLitIndexerContextualType.js b/tests/baselines/reference/objectLitIndexerContextualType.js
index f0cf90724b3..601462d8751 100644
--- a/tests/baselines/reference/objectLitIndexerContextualType.js
+++ b/tests/baselines/reference/objectLitIndexerContextualType.js
@@ -16,11 +16,12 @@ x = {
     0: t => t * t, // Should error
 };
 y = {
-    s: t => t * t, // Should not error
+    s: t => t * t, // Should error
 };
 y = {
     0: t => t * t, // Should error
-};
+};
+
 
 //// [objectLitIndexerContextualType.js]
 var x;
diff --git a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.js b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.js
index c0bd423cd79..29781229b5a 100644
--- a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.js
+++ b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.js
@@ -26,7 +26,7 @@ class PB extends B {
 var a: {
     [x: number]: string;
 }
-var b: { [x: number]: string; } = { foo: '' };
+var b: { [x: number]: string; } = { 0: '' };
 
 function foo1(x: A);
 function foo1(x: A); // error
@@ -159,7 +159,7 @@ var PB = (function (_super) {
     return PB;
 }(B));
 var a;
-var b = { foo: '' };
+var b = { 0: '' };
 function foo1(x) { }
 function foo1b(x) { }
 function foo1c(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.symbols b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.symbols
index 4a2eb1ab2a1..798fb5c3c57 100644
--- a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.symbols
+++ b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.symbols
@@ -47,23 +47,22 @@ var a: {
     [x: number]: string;
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers1.ts, 25, 5))
 }
-var b: { [x: number]: string; } = { foo: '' };
+var b: { [x: number]: string; } = { 0: '' };
 >b : Symbol(b, Decl(objectTypesIdentityWithNumericIndexers1.ts, 27, 3))
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers1.ts, 27, 10))
->foo : Symbol(foo, Decl(objectTypesIdentityWithNumericIndexers1.ts, 27, 35))
 
 function foo1(x: A);
->foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers1.ts, 27, 46), Decl(objectTypesIdentityWithNumericIndexers1.ts, 29, 20), Decl(objectTypesIdentityWithNumericIndexers1.ts, 30, 20))
+>foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers1.ts, 27, 44), Decl(objectTypesIdentityWithNumericIndexers1.ts, 29, 20), Decl(objectTypesIdentityWithNumericIndexers1.ts, 30, 20))
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers1.ts, 29, 14))
 >A : Symbol(A, Decl(objectTypesIdentityWithNumericIndexers1.ts, 0, 0))
 
 function foo1(x: A); // error
->foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers1.ts, 27, 46), Decl(objectTypesIdentityWithNumericIndexers1.ts, 29, 20), Decl(objectTypesIdentityWithNumericIndexers1.ts, 30, 20))
+>foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers1.ts, 27, 44), Decl(objectTypesIdentityWithNumericIndexers1.ts, 29, 20), Decl(objectTypesIdentityWithNumericIndexers1.ts, 30, 20))
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers1.ts, 30, 14))
 >A : Symbol(A, Decl(objectTypesIdentityWithNumericIndexers1.ts, 0, 0))
 
 function foo1(x: any) { }
->foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers1.ts, 27, 46), Decl(objectTypesIdentityWithNumericIndexers1.ts, 29, 20), Decl(objectTypesIdentityWithNumericIndexers1.ts, 30, 20))
+>foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers1.ts, 27, 44), Decl(objectTypesIdentityWithNumericIndexers1.ts, 29, 20), Decl(objectTypesIdentityWithNumericIndexers1.ts, 30, 20))
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers1.ts, 31, 14))
 
 function foo1b(x: B);
diff --git a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.types b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.types
index c5de5c7b9b4..78c69f0cdd3 100644
--- a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.types
+++ b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers1.types
@@ -47,11 +47,10 @@ var a: {
     [x: number]: string;
 >x : number
 }
-var b: { [x: number]: string; } = { foo: '' };
+var b: { [x: number]: string; } = { 0: '' };
 >b : { [x: number]: string; }
 >x : number
->{ foo: '' } : { foo: string; }
->foo : string
+>{ 0: '' } : { 0: string; }
 >'' : string
 
 function foo1(x: A);
diff --git a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers2.js b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers2.js
index 98c29e96a86..7ecb597a2d9 100644
--- a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers2.js
+++ b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers2.js
@@ -29,7 +29,7 @@ class PB extends B {
 var a: {
     [x: number]: Base;
 }
-var b: { [x: number]: Derived; } = { foo: <Derived>null };
+var b: { [x: number]: Derived; } = { 0: <Derived>null };
 
 function foo1(x: A);
 function foo1(x: A); // error
@@ -174,7 +174,7 @@ var PB = (function (_super) {
     return PB;
 }(B));
 var a;
-var b = { foo: null };
+var b = { 0: null };
 function foo1(x) { }
 function foo1b(x) { }
 function foo1c(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers2.symbols b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers2.symbols
index 5fde90941ef..b4ad1857748 100644
--- a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers2.symbols
+++ b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers2.symbols
@@ -60,25 +60,24 @@ var a: {
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers2.ts, 28, 5))
 >Base : Symbol(Base, Decl(objectTypesIdentityWithNumericIndexers2.ts, 0, 0))
 }
-var b: { [x: number]: Derived; } = { foo: <Derived>null };
+var b: { [x: number]: Derived; } = { 0: <Derived>null };
 >b : Symbol(b, Decl(objectTypesIdentityWithNumericIndexers2.ts, 30, 3))
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers2.ts, 30, 10))
 >Derived : Symbol(Derived, Decl(objectTypesIdentityWithNumericIndexers2.ts, 2, 27))
->foo : Symbol(foo, Decl(objectTypesIdentityWithNumericIndexers2.ts, 30, 36))
 >Derived : Symbol(Derived, Decl(objectTypesIdentityWithNumericIndexers2.ts, 2, 27))
 
 function foo1(x: A);
->foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers2.ts, 30, 58), Decl(objectTypesIdentityWithNumericIndexers2.ts, 32, 20), Decl(objectTypesIdentityWithNumericIndexers2.ts, 33, 20))
+>foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers2.ts, 30, 56), Decl(objectTypesIdentityWithNumericIndexers2.ts, 32, 20), Decl(objectTypesIdentityWithNumericIndexers2.ts, 33, 20))
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers2.ts, 32, 14))
 >A : Symbol(A, Decl(objectTypesIdentityWithNumericIndexers2.ts, 3, 43))
 
 function foo1(x: A); // error
->foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers2.ts, 30, 58), Decl(objectTypesIdentityWithNumericIndexers2.ts, 32, 20), Decl(objectTypesIdentityWithNumericIndexers2.ts, 33, 20))
+>foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers2.ts, 30, 56), Decl(objectTypesIdentityWithNumericIndexers2.ts, 32, 20), Decl(objectTypesIdentityWithNumericIndexers2.ts, 33, 20))
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers2.ts, 33, 14))
 >A : Symbol(A, Decl(objectTypesIdentityWithNumericIndexers2.ts, 3, 43))
 
 function foo1(x: any) { }
->foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers2.ts, 30, 58), Decl(objectTypesIdentityWithNumericIndexers2.ts, 32, 20), Decl(objectTypesIdentityWithNumericIndexers2.ts, 33, 20))
+>foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers2.ts, 30, 56), Decl(objectTypesIdentityWithNumericIndexers2.ts, 32, 20), Decl(objectTypesIdentityWithNumericIndexers2.ts, 33, 20))
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers2.ts, 34, 14))
 
 function foo1b(x: B);
diff --git a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers2.types b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers2.types
index 17fc6a07a00..ce38d95174b 100644
--- a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers2.types
+++ b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers2.types
@@ -60,12 +60,11 @@ var a: {
 >x : number
 >Base : Base
 }
-var b: { [x: number]: Derived; } = { foo: <Derived>null };
+var b: { [x: number]: Derived; } = { 0: <Derived>null };
 >b : { [x: number]: Derived; }
 >x : number
 >Derived : Derived
->{ foo: <Derived>null } : { foo: Derived; }
->foo : Derived
+>{ 0: <Derived>null } : { 0: Derived; }
 ><Derived>null : Derived
 >Derived : Derived
 >null : null
diff --git a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.js b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.js
index ea85b8b3c67..9710afe700d 100644
--- a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.js
+++ b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.js
@@ -26,7 +26,7 @@ class PB extends B {
 var a: {
     [x: string]: string;
 }
-var b: { [x: number]: string; } = { foo: '' };
+var b: { [x: number]: string; } = { 0: '' };
 
 function foo1(x: A);
 function foo1(x: A); // error
@@ -159,7 +159,7 @@ var PB = (function (_super) {
     return PB;
 }(B));
 var a;
-var b = { foo: '' };
+var b = { 0: '' };
 function foo1(x) { }
 function foo1b(x) { }
 function foo1c(x) { }
diff --git a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.symbols b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.symbols
index c0bc1b5cf60..ed95b3a7025 100644
--- a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.symbols
+++ b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.symbols
@@ -47,23 +47,22 @@ var a: {
     [x: string]: string;
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers3.ts, 25, 5))
 }
-var b: { [x: number]: string; } = { foo: '' };
+var b: { [x: number]: string; } = { 0: '' };
 >b : Symbol(b, Decl(objectTypesIdentityWithNumericIndexers3.ts, 27, 3))
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers3.ts, 27, 10))
->foo : Symbol(foo, Decl(objectTypesIdentityWithNumericIndexers3.ts, 27, 35))
 
 function foo1(x: A);
->foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers3.ts, 27, 46), Decl(objectTypesIdentityWithNumericIndexers3.ts, 29, 20), Decl(objectTypesIdentityWithNumericIndexers3.ts, 30, 20))
+>foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers3.ts, 27, 44), Decl(objectTypesIdentityWithNumericIndexers3.ts, 29, 20), Decl(objectTypesIdentityWithNumericIndexers3.ts, 30, 20))
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers3.ts, 29, 14))
 >A : Symbol(A, Decl(objectTypesIdentityWithNumericIndexers3.ts, 0, 0))
 
 function foo1(x: A); // error
->foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers3.ts, 27, 46), Decl(objectTypesIdentityWithNumericIndexers3.ts, 29, 20), Decl(objectTypesIdentityWithNumericIndexers3.ts, 30, 20))
+>foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers3.ts, 27, 44), Decl(objectTypesIdentityWithNumericIndexers3.ts, 29, 20), Decl(objectTypesIdentityWithNumericIndexers3.ts, 30, 20))
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers3.ts, 30, 14))
 >A : Symbol(A, Decl(objectTypesIdentityWithNumericIndexers3.ts, 0, 0))
 
 function foo1(x: any) { }
->foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers3.ts, 27, 46), Decl(objectTypesIdentityWithNumericIndexers3.ts, 29, 20), Decl(objectTypesIdentityWithNumericIndexers3.ts, 30, 20))
+>foo1 : Symbol(foo1, Decl(objectTypesIdentityWithNumericIndexers3.ts, 27, 44), Decl(objectTypesIdentityWithNumericIndexers3.ts, 29, 20), Decl(objectTypesIdentityWithNumericIndexers3.ts, 30, 20))
 >x : Symbol(x, Decl(objectTypesIdentityWithNumericIndexers3.ts, 31, 14))
 
 function foo1b(x: B);
diff --git a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.types b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.types
index 99e6b8c8632..a6ea5a292e5 100644
--- a/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.types
+++ b/tests/baselines/reference/objectTypesIdentityWithNumericIndexers3.types
@@ -47,11 +47,10 @@ var a: {
     [x: string]: string;
 >x : string
 }
-var b: { [x: number]: string; } = { foo: '' };
+var b: { [x: number]: string; } = { 0: '' };
 >b : { [x: number]: string; }
 >x : number
->{ foo: '' } : { foo: string; }
->foo : string
+>{ 0: '' } : { 0: string; }
 >'' : string
 
 function foo1(x: A);
diff --git a/tests/baselines/reference/propertyAccess.errors.txt b/tests/baselines/reference/propertyAccess.errors.txt
index 7d496f87751..b3244956174 100644
--- a/tests/baselines/reference/propertyAccess.errors.txt
+++ b/tests/baselines/reference/propertyAccess.errors.txt
@@ -1,10 +1,12 @@
+tests/cases/conformance/expressions/propertyAccess/propertyAccess.ts(11,55): error TS2322: Type '{ 3: string; 'three': string; }' is not assignable to type '{ [n: number]: string; }'.
+  Object literal may only specify known properties, and ''three'' does not exist in type '{ [n: number]: string; }'.
 tests/cases/conformance/expressions/propertyAccess/propertyAccess.ts(45,14): error TS2339: Property 'qqq' does not exist on type '{ 10: string; x: string; y: number; z: { n: string; m: number; o: () => boolean; }; 'literal property': number; }'.
 tests/cases/conformance/expressions/propertyAccess/propertyAccess.ts(80,10): error TS2342: An index expression argument must be of type 'string', 'number', 'symbol', or 'any'.
 tests/cases/conformance/expressions/propertyAccess/propertyAccess.ts(117,10): error TS2342: An index expression argument must be of type 'string', 'number', 'symbol', or 'any'.
 tests/cases/conformance/expressions/propertyAccess/propertyAccess.ts(140,12): error TS2342: An index expression argument must be of type 'string', 'number', 'symbol', or 'any'.
 
 
-==== tests/cases/conformance/expressions/propertyAccess/propertyAccess.ts (4 errors) ====
+==== tests/cases/conformance/expressions/propertyAccess/propertyAccess.ts (5 errors) ====
     class A {
         a: number;
     }
@@ -16,6 +18,9 @@ tests/cases/conformance/expressions/propertyAccess/propertyAccess.ts(140,12): er
     }
     
     var numIndex: { [n: number]: string } = { 3: 'three', 'three': 'three' };
+                                                          ~~~~~~~~~~~~~~~~
+!!! error TS2322: Type '{ 3: string; 'three': string; }' is not assignable to type '{ [n: number]: string; }'.
+!!! error TS2322:   Object literal may only specify known properties, and ''three'' does not exist in type '{ [n: number]: string; }'.
     var strIndex: { [n: string]: Compass } = { 'N': Compass.North, 'E': Compass.East };
     var bothIndex:
         {
diff --git a/tests/cases/compiler/indexSignaturesInferentialTyping.ts b/tests/cases/compiler/indexSignaturesInferentialTyping.ts
index e40f32a799b..b47293a77e5 100644
--- a/tests/cases/compiler/indexSignaturesInferentialTyping.ts
+++ b/tests/cases/compiler/indexSignaturesInferentialTyping.ts
@@ -2,6 +2,5 @@ function foo<T>(items: { [index: number]: T }): T { return undefined; }
 function bar<T>(items: { [index: string]: T }): T { return undefined; }
 
 var x1 = foo({ 0: 0, 1: 1 });       // type should be number
-var x2 = foo({ zero: 0, one: 1 });
-var x3 = bar({ 0: 0, 1: 1 });
-var x4 = bar({ zero: 0, one: 1 });  // type should be number
+var x2 = bar({ 0: 0, 1: 1 });
+var x3 = bar({ zero: 0, one: 1 });  // type should be number
diff --git a/tests/cases/compiler/numericIndexerConstraint4.ts b/tests/cases/compiler/numericIndexerConstraint4.ts
index abdfac0fc9c..7e890168558 100644
--- a/tests/cases/compiler/numericIndexerConstraint4.ts
+++ b/tests/cases/compiler/numericIndexerConstraint4.ts
@@ -8,4 +8,4 @@ class B extends A {
 
 var x: {
     [idx: number]: A;
-} = { data: new B() }
\ No newline at end of file
+} = { 0: new B() }
diff --git a/tests/cases/compiler/objectLitIndexerContextualType.ts b/tests/cases/compiler/objectLitIndexerContextualType.ts
index 2b07d995183..b687e226cfc 100644
--- a/tests/cases/compiler/objectLitIndexerContextualType.ts
+++ b/tests/cases/compiler/objectLitIndexerContextualType.ts
@@ -15,8 +15,8 @@ x = {
     0: t => t * t, // Should error
 };
 y = {
-    s: t => t * t, // Should not error
+    s: t => t * t, // Should error
 };
 y = {
     0: t => t * t, // Should error
-};
\ No newline at end of file
+};
diff --git a/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES5.ts b/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES5.ts
index 722891c2f6a..4f124ece6d2 100644
--- a/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES5.ts
+++ b/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES5.ts
@@ -6,9 +6,9 @@ interface I<T> {
 declare function foo<T>(obj: I<T>): T
 
 foo({
-    p: "",
+    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
     [+"hi"]: [0]
-});
\ No newline at end of file
+});
diff --git a/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES6.ts b/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES6.ts
index 1ddb966488d..2a7a476ca7a 100644
--- a/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES6.ts
+++ b/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES6.ts
@@ -6,9 +6,9 @@ interface I<T> {
 declare function foo<T>(obj: I<T>): T
 
 foo({
-    p: "",
+    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
     [+"hi"]: [0]
-});
\ No newline at end of file
+});
diff --git a/tests/cases/conformance/types/typeRelationships/typeAndMemberIdentity/objectTypesIdentityWithNumericIndexers1.ts b/tests/cases/conformance/types/typeRelationships/typeAndMemberIdentity/objectTypesIdentityWithNumericIndexers1.ts
index 7092fab6c31..867199d9051 100644
--- a/tests/cases/conformance/types/typeRelationships/typeAndMemberIdentity/objectTypesIdentityWithNumericIndexers1.ts
+++ b/tests/cases/conformance/types/typeRelationships/typeAndMemberIdentity/objectTypesIdentityWithNumericIndexers1.ts
@@ -25,7 +25,7 @@ class PB extends B {
 var a: {
     [x: number]: string;
 }
-var b: { [x: number]: string; } = { foo: '' };
+var b: { [x: number]: string; } = { 0: '' };
 
 function foo1(x: A);
 function foo1(x: A); // error
diff --git a/tests/cases/conformance/types/typeRelationships/typeAndMemberIdentity/objectTypesIdentityWithNumericIndexers2.ts b/tests/cases/conformance/types/typeRelationships/typeAndMemberIdentity/objectTypesIdentityWithNumericIndexers2.ts
index b5c0f4c1615..ea9d7d04ee2 100644
--- a/tests/cases/conformance/types/typeRelationships/typeAndMemberIdentity/objectTypesIdentityWithNumericIndexers2.ts
+++ b/tests/cases/conformance/types/typeRelationships/typeAndMemberIdentity/objectTypesIdentityWithNumericIndexers2.ts
@@ -28,7 +28,7 @@ class PB extends B {
 var a: {
     [x: number]: Base;
 }
-var b: { [x: number]: Derived; } = { foo: <Derived>null };
+var b: { [x: number]: Derived; } = { 0: <Derived>null };
 
 function foo1(x: A);
 function foo1(x: A); // error
diff --git a/tests/cases/conformance/types/typeRelationships/typeAndMemberIdentity/objectTypesIdentityWithNumericIndexers3.ts b/tests/cases/conformance/types/typeRelationships/typeAndMemberIdentity/objectTypesIdentityWithNumericIndexers3.ts
index ae64acedcec..d3f22604c44 100644
--- a/tests/cases/conformance/types/typeRelationships/typeAndMemberIdentity/objectTypesIdentityWithNumericIndexers3.ts
+++ b/tests/cases/conformance/types/typeRelationships/typeAndMemberIdentity/objectTypesIdentityWithNumericIndexers3.ts
@@ -25,7 +25,7 @@ class PB extends B {
 var a: {
     [x: string]: string;
 }
-var b: { [x: number]: string; } = { foo: '' };
+var b: { [x: number]: string; } = { 0: '' };
 
 function foo1(x: A);
 function foo1(x: A); // error

From f7ff3eb562611f2fc5791a95ace04c107962cc84 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 25 May 2016 11:42:48 -0700
Subject: [PATCH 093/332] Remove uses of `null` in services

---
 src/services/formatting/ruleOperation.ts | 14 ++------------
 src/services/formatting/rulesMap.ts      |  5 ++---
 src/services/formatting/rulesProvider.ts |  4 +---
 3 files changed, 5 insertions(+), 18 deletions(-)

diff --git a/src/services/formatting/ruleOperation.ts b/src/services/formatting/ruleOperation.ts
index 9c35b80bcfe..8ad83b11653 100644
--- a/src/services/formatting/ruleOperation.ts
+++ b/src/services/formatting/ruleOperation.ts
@@ -1,16 +1,9 @@
 ///<reference path='references.ts' />
-/* tslint:disable:no-null-keyword */
 
 /* @internal */
 namespace ts.formatting {
     export class RuleOperation {
-        public Context: RuleOperationContext;
-        public Action: RuleAction;
-
-        constructor() {
-            this.Context = null;
-            this.Action = null;
-        }
+        constructor(public Context: RuleOperationContext, public Action: RuleAction) {}
 
         public toString(): string {
             return "[context=" + this.Context + "," +
@@ -22,10 +15,7 @@ namespace ts.formatting {
         }
 
         static create2(context: RuleOperationContext, action: RuleAction) {
-            const result = new RuleOperation();
-            result.Context = context;
-            result.Action = action;
-            return result;
+            return new RuleOperation(context, action);
         }
     }
 }
\ No newline at end of file
diff --git a/src/services/formatting/rulesMap.ts b/src/services/formatting/rulesMap.ts
index 74a1a33b7de..7f635ea07e3 100644
--- a/src/services/formatting/rulesMap.ts
+++ b/src/services/formatting/rulesMap.ts
@@ -1,5 +1,4 @@
 ///<reference path='references.ts' />
-/* tslint:disable:no-null-keyword */
 
 /* @internal */
 namespace ts.formatting {
@@ -62,14 +61,14 @@ namespace ts.formatting {
         public GetRule(context: FormattingContext): Rule {
             const bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
             const bucket = this.map[bucketIndex];
-            if (bucket != null) {
+            if (bucket) {
                 for (const rule of bucket.Rules()) {
                     if (rule.Operation.Context.InContext(context)) {
                         return rule;
                     }
                 }
             }
-            return null;
+            return undefined;
         }
     }
 
diff --git a/src/services/formatting/rulesProvider.ts b/src/services/formatting/rulesProvider.ts
index 19581173f2d..d672a401d89 100644
--- a/src/services/formatting/rulesProvider.ts
+++ b/src/services/formatting/rulesProvider.ts
@@ -1,5 +1,4 @@
 /// <reference path="references.ts"/>
-/* tslint:disable:no-null-keyword */
 
 /* @internal */
 namespace ts.formatting {
@@ -26,8 +25,7 @@ namespace ts.formatting {
         }
 
         public ensureUpToDate(options: ts.FormatCodeOptions) {
-            // TODO: Should this be '==='?
-            if (this.options == null || !ts.compareDataObjects(this.options, options)) {
+            if (!this.options || !ts.compareDataObjects(this.options, options)) {
                 const activeRules = this.createActiveRules(options);
                 const rulesMap = RulesMap.create(activeRules);
 

From 58c8d345bc56b53a63f6b5f516484153fbbac5fe Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Wed, 25 May 2016 12:17:57 -0700
Subject: [PATCH 094/332] Update LKG

---
 lib/lib.d.ts                |  24 +-
 lib/lib.es5.d.ts            |  24 +-
 lib/lib.es6.d.ts            |  24 +-
 lib/tsc.js                  | 365 ++++++++++++++++-------
 lib/tsserver.js             | 431 ++++++++++++++++++---------
 lib/tsserverlibrary.d.ts    |  48 +++-
 lib/tsserverlibrary.js      | 431 ++++++++++++++++++---------
 lib/typescript.d.ts         |  40 ++-
 lib/typescript.js           | 560 ++++++++++++++++++++++++------------
 lib/typescriptServices.d.ts |  40 ++-
 lib/typescriptServices.js   | 560 ++++++++++++++++++++++++------------
 11 files changed, 1726 insertions(+), 821 deletions(-)

diff --git a/lib/lib.d.ts b/lib/lib.d.ts
index 6bded7a1135..15745c5d533 100644
--- a/lib/lib.d.ts
+++ b/lib/lib.d.ts
@@ -965,38 +965,22 @@ interface JSON {
       * If a member contains nested objects, the nested objects are transformed before the parent object is.
       */
     parse(text: string, reviver?: (key: any, value: any) => any): any;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      */
-    stringify(value: any): string;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer A function that transforms the results.
-      */
-    stringify(value: any, replacer: (key: string, value: any) => any): string;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer Array that transforms the results.
-      */
-    stringify(value: any, replacer: any[]): string;
     /**
       * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
       * @param value A JavaScript value, usually an object or array, to be converted.
       * @param replacer A function that transforms the results.
       * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
       */
-    stringify(value: any, replacer: (key: string, value: any) => any, space: string | number): string;
+    stringify(value: any, replacer?: (key: string, value: any) => any, space?: string | number): string;
     /**
       * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
       * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer Array that transforms the results.
+      * @param replacer An array of strings and numbers that acts as a white list for selecting the object properties that will be stringified.
       * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
       */
-    stringify(value: any, replacer: any[], space: string | number): string;
+    stringify(value: any, replacer?: (number | string)[] | null, space?: string | number): string;
 }
+
 /**
   * An intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format.
   */
diff --git a/lib/lib.es5.d.ts b/lib/lib.es5.d.ts
index 3a0f73f3cc7..e4e0334e0cb 100644
--- a/lib/lib.es5.d.ts
+++ b/lib/lib.es5.d.ts
@@ -965,38 +965,22 @@ interface JSON {
       * If a member contains nested objects, the nested objects are transformed before the parent object is.
       */
     parse(text: string, reviver?: (key: any, value: any) => any): any;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      */
-    stringify(value: any): string;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer A function that transforms the results.
-      */
-    stringify(value: any, replacer: (key: string, value: any) => any): string;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer Array that transforms the results.
-      */
-    stringify(value: any, replacer: any[]): string;
     /**
       * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
       * @param value A JavaScript value, usually an object or array, to be converted.
       * @param replacer A function that transforms the results.
       * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
       */
-    stringify(value: any, replacer: (key: string, value: any) => any, space: string | number): string;
+    stringify(value: any, replacer?: (key: string, value: any) => any, space?: string | number): string;
     /**
       * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
       * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer Array that transforms the results.
+      * @param replacer An array of strings and numbers that acts as a white list for selecting the object properties that will be stringified.
       * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
       */
-    stringify(value: any, replacer: any[], space: string | number): string;
+    stringify(value: any, replacer?: (number | string)[] | null, space?: string | number): string;
 }
+
 /**
   * An intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format.
   */
diff --git a/lib/lib.es6.d.ts b/lib/lib.es6.d.ts
index 6ed743d739a..ae54e8e8570 100644
--- a/lib/lib.es6.d.ts
+++ b/lib/lib.es6.d.ts
@@ -965,38 +965,22 @@ interface JSON {
       * If a member contains nested objects, the nested objects are transformed before the parent object is.
       */
     parse(text: string, reviver?: (key: any, value: any) => any): any;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      */
-    stringify(value: any): string;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer A function that transforms the results.
-      */
-    stringify(value: any, replacer: (key: string, value: any) => any): string;
-    /**
-      * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
-      * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer Array that transforms the results.
-      */
-    stringify(value: any, replacer: any[]): string;
     /**
       * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
       * @param value A JavaScript value, usually an object or array, to be converted.
       * @param replacer A function that transforms the results.
       * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
       */
-    stringify(value: any, replacer: (key: string, value: any) => any, space: string | number): string;
+    stringify(value: any, replacer?: (key: string, value: any) => any, space?: string | number): string;
     /**
       * Converts a JavaScript value to a JavaScript Object Notation (JSON) string.
       * @param value A JavaScript value, usually an object or array, to be converted.
-      * @param replacer Array that transforms the results.
+      * @param replacer An array of strings and numbers that acts as a white list for selecting the object properties that will be stringified.
       * @param space Adds indentation, white space, and line break characters to the return-value JSON text to make it easier to read.
       */
-    stringify(value: any, replacer: any[], space: string | number): string;
+    stringify(value: any, replacer?: (number | string)[] | null, space?: string | number): string;
 }
+
 /**
   * An intrinsic object that provides functions to convert JavaScript values to and from the JavaScript Object Notation (JSON) format.
   */
diff --git a/lib/tsc.js b/lib/tsc.js
index 8dba7a921dc..00c758c0446 100644
--- a/lib/tsc.js
+++ b/lib/tsc.js
@@ -913,6 +913,10 @@ var ts;
                 }
                 return result.sort();
             }
+            function getDirectories(path) {
+                var folder = fso.GetFolder(path);
+                return getNames(folder.subfolders);
+            }
             function readDirectory(path, extension, exclude) {
                 var result = [];
                 exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
@@ -967,6 +971,7 @@ var ts;
                 getCurrentDirectory: function () {
                     return new ActiveXObject("WScript.Shell").CurrentDirectory;
                 },
+                getDirectories: getDirectories,
                 readDirectory: readDirectory,
                 exit: function (exitCode) {
                     try {
@@ -1114,6 +1119,9 @@ var ts;
             function directoryExists(path) {
                 return fileSystemEntryExists(path, 1);
             }
+            function getDirectories(path) {
+                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1); });
+            }
             function readDirectory(path, extension, exclude) {
                 var result = [];
                 exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
@@ -1206,6 +1214,7 @@ var ts;
                 getCurrentDirectory: function () {
                     return process.cwd();
                 },
+                getDirectories: getDirectories,
                 readDirectory: readDirectory,
                 getModifiedTime: function (path) {
                     try {
@@ -1256,6 +1265,7 @@ var ts;
                 createDirectory: ChakraHost.createDirectory,
                 getExecutingFilePath: function () { return ChakraHost.executingFile; },
                 getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
+                getDirectories: ChakraHost.getDirectories,
                 readDirectory: ChakraHost.readDirectory,
                 exit: ChakraHost.quit,
                 realpath: realpath
@@ -1389,7 +1399,7 @@ var ts;
         or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
         Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
         Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
-        Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting_the_module_compiler_option_in_a_tsconfig_json_file: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting__1148", message: "Cannot compile modules unless the '--module' flag is provided with a valid module type. Consider setting the 'module' compiler option in a 'tsconfig.json' file." },
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
         File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
         new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
         const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
@@ -1759,6 +1769,8 @@ var ts;
         this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
         The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
         The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
+        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
+        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
         Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
         Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
         Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
@@ -1852,7 +1864,7 @@ var ts;
         Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
         Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
         Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
-        Substututions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substututions_for_pattern_0_should_be_an_array_5063", message: "Substututions for pattern '{0}' should be an array." },
+        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
         Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
         Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
         Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
@@ -1865,6 +1877,7 @@ var ts;
         Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
         Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
         Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
+        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
         Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
         Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
         Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
@@ -1966,6 +1979,7 @@ var ts;
         Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
         The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
         Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
         Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
         Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
         Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
@@ -5004,7 +5018,7 @@ var ts;
     }
     ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
     function getPropertyNameForPropertyNameNode(name) {
-        if (name.kind === 69 || name.kind === 9 || name.kind === 8) {
+        if (name.kind === 69 || name.kind === 9 || name.kind === 8 || name.kind === 142) {
             return name.text;
         }
         if (name.kind === 140) {
@@ -12050,10 +12064,10 @@ var ts;
                 case 145:
                 case 144:
                 case 266:
-                    return bindPropertyOrMethodOrAccessor(node, 4 | (node.questionToken ? 536870912 : 0), 107455);
+                    return bindPropertyOrMethodOrAccessor(node, 4 | (node.questionToken ? 536870912 : 0), 0);
                 case 253:
                 case 254:
-                    return bindPropertyOrMethodOrAccessor(node, 4, 107455);
+                    return bindPropertyOrMethodOrAccessor(node, 4, 0);
                 case 255:
                     return bindPropertyOrMethodOrAccessor(node, 8, 107455);
                 case 247:
@@ -12065,7 +12079,7 @@ var ts;
                     return declareSymbolAndAddToSymbolTable(node, 131072, 0);
                 case 147:
                 case 146:
-                    return bindPropertyOrMethodOrAccessor(node, 8192 | (node.questionToken ? 536870912 : 0), ts.isObjectLiteralMethod(node) ? 107455 : 99263);
+                    return bindPropertyOrMethodOrAccessor(node, 8192 | (node.questionToken ? 536870912 : 0), ts.isObjectLiteralMethod(node) ? 0 : 99263);
                 case 220:
                     return bindFunctionDeclaration(node);
                 case 148:
@@ -12108,7 +12122,7 @@ var ts;
                 case 238:
                     return declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
                 case 228:
-                    return bindGlobalModuleExportDeclaration(node);
+                    return bindNamespaceExportDeclaration(node);
                 case 231:
                     return bindImportClause(node);
                 case 236:
@@ -12144,13 +12158,13 @@ var ts;
                 bindAnonymousDeclaration(node, 8388608, getDeclarationName(node));
             }
             else if (boundExpression.kind === 69 && node.kind === 235) {
-                declareSymbol(container.symbol.exports, container.symbol, node, 8388608, 107455 | 8388608);
+                declareSymbol(container.symbol.exports, container.symbol, node, 8388608, 0 | 8388608);
             }
             else {
-                declareSymbol(container.symbol.exports, container.symbol, node, 4, 107455 | 8388608);
+                declareSymbol(container.symbol.exports, container.symbol, node, 4, 0 | 8388608);
             }
         }
-        function bindGlobalModuleExportDeclaration(node) {
+        function bindNamespaceExportDeclaration(node) {
             if (node.modifiers && node.modifiers.length) {
                 file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
             }
@@ -12202,7 +12216,7 @@ var ts;
         function bindThisPropertyAssignment(node) {
             if (container.kind === 179 || container.kind === 220) {
                 container.symbol.members = container.symbol.members || {};
-                declareSymbol(container.symbol.members, container.symbol, node, 4, 107455 & ~4);
+                declareSymbol(container.symbol.members, container.symbol, node, 4, 0 & ~4);
             }
         }
         function bindPrototypePropertyAssignment(node) {
@@ -12219,7 +12233,7 @@ var ts;
             if (!funcSymbol.members) {
                 funcSymbol.members = {};
             }
-            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4, 107455);
+            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4, 0);
         }
         function bindCallExpression(node) {
             if (!file.commonJsModuleIndicator && ts.isRequireCall(node, false)) {
@@ -12295,7 +12309,7 @@ var ts;
             }
             if (ts.isParameterPropertyDeclaration(node)) {
                 var classDeclaration = node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4, 107455);
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4, 0);
             }
         }
         function bindFunctionDeclaration(node) {
@@ -12595,7 +12609,7 @@ var ts;
             if (flags & 1)
                 result |= 107454;
             if (flags & 4)
-                result |= 107455;
+                result |= 0;
             if (flags & 8)
                 result |= 107455;
             if (flags & 16)
@@ -12851,6 +12865,7 @@ var ts;
             var propertyWithInvalidInitializer;
             var errorLocation = location;
             var grandparent;
+            var isInExternalModule = false;
             loop: while (location) {
                 if (location.locals && !isGlobalSourceFile(location)) {
                     if (result = getSymbol(location.locals, name, meaning)) {
@@ -12882,6 +12897,7 @@ var ts;
                     case 256:
                         if (!ts.isExternalOrCommonJsModule(location))
                             break;
+                        isInExternalModule = true;
                     case 225:
                         var moduleExports = getSymbolOfNode(location).exports;
                         if (location.kind === 256 || ts.isAmbientModule(location)) {
@@ -13005,6 +13021,12 @@ var ts;
                         checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
                     }
                 }
+                if (result && isInExternalModule) {
+                    var decls = result.declarations;
+                    if (decls && decls.length === 1 && decls[0].kind === 228) {
+                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
+                    }
+                }
             }
             return result;
         }
@@ -14480,7 +14502,7 @@ var ts;
         }
         function getTypeForBindingElementParent(node) {
             var symbol = getSymbolOfNode(node);
-            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, false);
         }
         function getTextOfPropertyName(name) {
             switch (name.kind) {
@@ -14585,7 +14607,7 @@ var ts;
         function addOptionality(type, optional) {
             return strictNullChecks && optional ? addNullableKind(type, 32) : type;
         }
-        function getTypeForVariableLikeDeclaration(declaration) {
+        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
             if (declaration.flags & 134217728) {
                 var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
                 if (type && type !== unknownType) {
@@ -14602,7 +14624,7 @@ var ts;
                 return getTypeForBindingElement(declaration);
             }
             if (declaration.type) {
-                return addOptionality(getTypeFromTypeNode(declaration.type), !!declaration.questionToken);
+                return addOptionality(getTypeFromTypeNode(declaration.type), declaration.questionToken && includeOptionality);
             }
             if (declaration.kind === 142) {
                 var func = declaration.parent;
@@ -14621,11 +14643,11 @@ var ts;
                     ? getContextuallyTypedThisType(func)
                     : getContextuallyTypedParameterType(declaration);
                 if (type) {
-                    return addOptionality(type, !!declaration.questionToken);
+                    return addOptionality(type, declaration.questionToken && includeOptionality);
                 }
             }
             if (declaration.initializer) {
-                return addOptionality(checkExpressionCached(declaration.initializer), !!declaration.questionToken);
+                return addOptionality(checkExpressionCached(declaration.initializer), declaration.questionToken && includeOptionality);
             }
             if (declaration.kind === 254) {
                 return checkIdentifier(declaration.name);
@@ -14693,7 +14715,7 @@ var ts;
                 : getTypeFromArrayBindingPattern(pattern, includePatternInType);
         }
         function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
-            var type = getTypeForVariableLikeDeclaration(declaration);
+            var type = getTypeForVariableLikeDeclaration(declaration, true);
             if (type) {
                 if (reportErrors) {
                     reportErrorsFromWidening(declaration, type);
@@ -17010,7 +17032,7 @@ var ts;
                     return isIdenticalTo(source, target);
                 }
                 if (!(target.flags & 134217728)) {
-                    if (target.flags & 1)
+                    if (target.flags & 1 || source.flags & 134217728)
                         return -1;
                     if (source.flags & 32) {
                         if (!strictNullChecks || target.flags & (32 | 16) || source === emptyArrayElementType)
@@ -17030,7 +17052,7 @@ var ts;
                     if (source.flags & 256 && target === stringType)
                         return -1;
                     if (relation === assignableRelation || relation === comparableRelation) {
-                        if (source.flags & (1 | 134217728))
+                        if (source.flags & 1)
                             return -1;
                         if (source === numberType && target.flags & 128)
                             return -1;
@@ -17807,41 +17829,47 @@ var ts;
                 getSignaturesOfType(type, 0).length === 0 &&
                 getSignaturesOfType(type, 1).length === 0;
         }
+        function createTransientSymbol(source, type) {
+            var symbol = createSymbol(source.flags | 67108864, source.name);
+            symbol.declarations = source.declarations;
+            symbol.parent = source.parent;
+            symbol.type = type;
+            symbol.target = source;
+            if (source.valueDeclaration) {
+                symbol.valueDeclaration = source.valueDeclaration;
+            }
+            return symbol;
+        }
+        function transformTypeOfMembers(type, f) {
+            var members = {};
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var property = _a[_i];
+                var original = getTypeOfSymbol(property);
+                var updated = f(original);
+                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
+            }
+            ;
+            return members;
+        }
         function getRegularTypeOfObjectLiteral(type) {
-            if (type.flags & 1048576) {
-                var regularType = type.regularType;
-                if (!regularType) {
-                    regularType = createType(type.flags & ~1048576);
-                    regularType.symbol = type.symbol;
-                    regularType.members = type.members;
-                    regularType.properties = type.properties;
-                    regularType.callSignatures = type.callSignatures;
-                    regularType.constructSignatures = type.constructSignatures;
-                    regularType.stringIndexInfo = type.stringIndexInfo;
-                    regularType.numberIndexInfo = type.numberIndexInfo;
-                    type.regularType = regularType;
-                }
+            if (!(type.flags & 1048576)) {
+                return type;
+            }
+            var regularType = type.regularType;
+            if (regularType) {
                 return regularType;
             }
-            return type;
+            var resolved = type;
+            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
+            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
+            regularNew.flags = resolved.flags & ~1048576;
+            type.regularType = regularNew;
+            return regularNew;
         }
         function getWidenedTypeOfObjectLiteral(type) {
-            var properties = getPropertiesOfObjectType(type);
-            var members = {};
-            ts.forEach(properties, function (p) {
-                var propType = getTypeOfSymbol(p);
-                var widenedType = getWidenedType(propType);
-                if (propType !== widenedType) {
-                    var symbol = createSymbol(p.flags | 67108864, p.name);
-                    symbol.declarations = p.declarations;
-                    symbol.parent = p.parent;
-                    symbol.type = widenedType;
-                    symbol.target = p;
-                    if (p.valueDeclaration)
-                        symbol.valueDeclaration = p.valueDeclaration;
-                    p = symbol;
-                }
-                members[p.name] = p;
+            var members = transformTypeOfMembers(type, function (prop) {
+                var widened = getWidenedType(prop);
+                return prop === widened ? prop : widened;
             });
             var stringIndexInfo = getIndexInfoOfType(type, 0);
             var numberIndexInfo = getIndexInfoOfType(type, 1);
@@ -19134,7 +19162,7 @@ var ts;
             }
             return nodeCheckFlag === 512
                 ? getBaseConstructorTypeOfClass(classType)
-                : baseClassType;
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
             function isLegalUsageOfSuperExpression(container) {
                 if (!container) {
                     return false;
@@ -21182,7 +21210,7 @@ var ts;
                 var types = void 0;
                 var funcIsGenerator = !!func.asteriskToken;
                 if (funcIsGenerator) {
-                    types = checkAndAggregateYieldOperandTypes(func.body, contextualMapper);
+                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
                     if (types.length === 0) {
                         var iterableIteratorAny = createIterableIteratorType(anyType);
                         if (compilerOptions.noImplicitAny) {
@@ -21192,8 +21220,7 @@ var ts;
                     }
                 }
                 else {
-                    var hasImplicitReturn = !!(func.flags & 32768);
-                    types = checkAndAggregateReturnExpressionTypes(func.body, contextualMapper, isAsync, hasImplicitReturn);
+                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
                     if (!types) {
                         return neverType;
                     }
@@ -21240,9 +21267,9 @@ var ts;
                 return widenedType;
             }
         }
-        function checkAndAggregateYieldOperandTypes(body, contextualMapper) {
+        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
             var aggregatedTypes = [];
-            ts.forEachYieldExpression(body, function (yieldExpression) {
+            ts.forEachYieldExpression(func.body, function (yieldExpression) {
                 var expr = yieldExpression.expression;
                 if (expr) {
                     var type = checkExpressionCached(expr, contextualMapper);
@@ -21256,28 +21283,34 @@ var ts;
             });
             return aggregatedTypes;
         }
-        function checkAndAggregateReturnExpressionTypes(body, contextualMapper, isAsync, hasImplicitReturn) {
+        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
+            var isAsync = ts.isAsyncFunctionLike(func);
             var aggregatedTypes = [];
-            var hasOmittedExpressions = false;
-            ts.forEachReturnStatement(body, function (returnStatement) {
+            var hasReturnWithNoExpression = !!(func.flags & 32768);
+            var hasReturnOfTypeNever = false;
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
                 var expr = returnStatement.expression;
                 if (expr) {
                     var type = checkExpressionCached(expr, contextualMapper);
                     if (isAsync) {
-                        type = checkAwaitedType(type, body.parent, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
                     }
-                    if (type !== neverType && !ts.contains(aggregatedTypes, type)) {
+                    if (type === neverType) {
+                        hasReturnOfTypeNever = true;
+                    }
+                    else if (!ts.contains(aggregatedTypes, type)) {
                         aggregatedTypes.push(type);
                     }
                 }
                 else {
-                    hasOmittedExpressions = true;
+                    hasReturnWithNoExpression = true;
                 }
             });
-            if (aggregatedTypes.length === 0 && !hasOmittedExpressions && !hasImplicitReturn) {
+            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
+                func.kind === 179 || func.kind === 180)) {
                 return undefined;
             }
-            if (strictNullChecks && aggregatedTypes.length && (hasOmittedExpressions || hasImplicitReturn)) {
+            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
                 if (!ts.contains(aggregatedTypes, undefinedType)) {
                     aggregatedTypes.push(undefinedType);
                 }
@@ -21407,7 +21440,9 @@ var ts;
                     (expr.kind === 172 || expr.kind === 173) &&
                     expr.expression.kind === 97) {
                     var func = ts.getContainingFunction(expr);
-                    return !(func && func.kind === 148 && func.parent === symbol.valueDeclaration.parent);
+                    if (!(func && func.kind === 148))
+                        return true;
+                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
                 }
                 return true;
             }
@@ -22231,6 +22266,79 @@ var ts;
                 }
             }
         }
+        function checkClassForDuplicateDeclarations(node) {
+            var getter = 1, setter = 2, property = getter | setter;
+            var instanceNames = {};
+            var staticNames = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 148) {
+                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                        var param = _c[_b];
+                        if (ts.isParameterPropertyDeclaration(param)) {
+                            addName(instanceNames, param.name, param.name.text, property);
+                        }
+                    }
+                }
+                else {
+                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113; });
+                    var names = static ? staticNames : instanceNames;
+                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
+                    if (memberName) {
+                        switch (member.kind) {
+                            case 149:
+                                addName(names, member.name, memberName, getter);
+                                break;
+                            case 150:
+                                addName(names, member.name, memberName, setter);
+                                break;
+                            case 145:
+                                addName(names, member.name, memberName, property);
+                                break;
+                        }
+                    }
+                }
+            }
+            function addName(names, location, name, meaning) {
+                if (ts.hasProperty(names, name)) {
+                    var prev = names[name];
+                    if (prev & meaning) {
+                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                    }
+                    else {
+                        names[name] = prev | meaning;
+                    }
+                }
+                else {
+                    names[name] = meaning;
+                }
+            }
+        }
+        function checkObjectTypeForDuplicateDeclarations(node) {
+            var names = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind == 144) {
+                    var memberName = void 0;
+                    switch (member.name.kind) {
+                        case 9:
+                        case 8:
+                        case 69:
+                            memberName = member.name.text;
+                            break;
+                        default:
+                            continue;
+                    }
+                    if (ts.hasProperty(names, memberName)) {
+                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                    }
+                    else {
+                        names[memberName] = true;
+                    }
+                }
+            }
+        }
         function checkTypeForDuplicateIndexSignatures(node) {
             if (node.kind === 222) {
                 var nodeSymbol = getSymbolOfNode(node);
@@ -22449,6 +22557,7 @@ var ts;
                 var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
                 checkIndexConstraints(type);
                 checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
             }
         }
         function checkArrayType(node) {
@@ -23208,6 +23317,10 @@ var ts;
                 if (node.initializer) {
                     checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, undefined);
                 }
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                }
             }
             if (node.kind !== 145 && node.kind !== 144) {
                 checkExportsOnMergedDeclarations(node);
@@ -23220,6 +23333,18 @@ var ts;
                 checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             }
         }
+        function areDeclarationFlagsIdentical(left, right) {
+            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
+                return false;
+            }
+            var interestingFlags = 8 |
+                16 |
+                256 |
+                128 |
+                64 |
+                32;
+            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
+        }
         function checkVariableDeclaration(node) {
             checkGrammarVariableDeclaration(node);
             return checkVariableLikeDeclaration(node);
@@ -23770,6 +23895,7 @@ var ts;
             var typeWithThis = getTypeWithThisArgument(type);
             var staticType = getTypeOfSymbol(symbol);
             checkTypeParameterListsIdentical(node, symbol);
+            checkClassForDuplicateDeclarations(node);
             var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
             if (baseTypeNode) {
                 var baseTypes = getBaseTypes(type);
@@ -23981,6 +24107,7 @@ var ts;
                         checkIndexConstraints(type);
                     }
                 }
+                checkObjectTypeForDuplicateDeclarations(node);
             }
             ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
                 if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
@@ -24735,10 +24862,8 @@ var ts;
         function checkSourceFileWorker(node) {
             var links = getNodeLinks(node);
             if (!(links.flags & 1)) {
-                if (compilerOptions.skipDefaultLibCheck) {
-                    if (node.hasNoDefaultLib) {
-                        return;
-                    }
+                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
+                    return;
                 }
                 checkGrammarSourceFile(node);
                 potentialThisCollisions.length = 0;
@@ -25107,7 +25232,7 @@ var ts;
                 return symbol && getTypeOfSymbol(symbol);
             }
             if (ts.isBindingPattern(node)) {
-                return getTypeForVariableLikeDeclaration(node.parent);
+                return getTypeForVariableLikeDeclaration(node.parent, true);
             }
             if (isInRightSideOfImportOrExportAssignment(node)) {
                 var symbol = getSymbolAtLocation(node);
@@ -25546,7 +25671,7 @@ var ts;
                 if (file.moduleAugmentations.length) {
                     (augmentations || (augmentations = [])).push(file.moduleAugmentations);
                 }
-                if (file.wasReferenced && file.symbol && file.symbol.globalExports) {
+                if (file.symbol && file.symbol.globalExports) {
                     mergeSymbolTable(globals, file.symbol.globalExports);
                 }
             });
@@ -26116,7 +26241,6 @@ var ts;
                 if (prop.kind === 193 ||
                     name_20.kind === 140) {
                     checkGrammarComputedPropertyName(name_20);
-                    return "continue";
                 }
                 if (prop.kind === 254 && !inDestructuring && prop.objectAssignmentInitializer) {
                     return { value: grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment) };
@@ -26146,17 +26270,21 @@ var ts;
                 else {
                     ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
                 }
-                if (!ts.hasProperty(seen, name_20.text)) {
-                    seen[name_20.text] = currentKind;
+                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_20);
+                if (effectiveName === undefined) {
+                    return "continue";
+                }
+                if (!ts.hasProperty(seen, effectiveName)) {
+                    seen[effectiveName] = currentKind;
                 }
                 else {
-                    var existingKind = seen[name_20.text];
+                    var existingKind = seen[effectiveName];
                     if (currentKind === Property && existingKind === Property) {
-                        return "continue";
+                        grammarErrorOnNode(name_20, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_20));
                     }
                     else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
                         if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[name_20.text] = currentKind | existingKind;
+                            seen[effectiveName] = currentKind | existingKind;
                         }
                         else {
                             return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
@@ -34613,7 +34741,7 @@ var ts;
             skipTsx: true,
             traceEnabled: traceEnabled
         };
-        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : undefined);
+        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
         if (traceEnabled) {
             if (containingFile === undefined) {
                 if (rootDir === undefined) {
@@ -35116,12 +35244,25 @@ var ts;
                 }
             }
         }
+        function getDefaultTypeDirectiveNames(rootPath) {
+            var localTypes = ts.combinePaths(rootPath, "types");
+            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
+            var result = [];
+            if (ts.sys.directoryExists(localTypes)) {
+                result = result.concat(ts.sys.getDirectories(localTypes));
+            }
+            if (ts.sys.directoryExists(npmTypes)) {
+                result = result.concat(ts.sys.getDirectories(npmTypes));
+            }
+            return result;
+        }
         function getDefaultLibLocation() {
             return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
         }
         var newLine = ts.getNewLineCharacter(options);
         var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
         return {
+            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
             getSourceFile: getSourceFile,
             getDefaultLibLocation: getDefaultLibLocation,
             getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
@@ -35189,6 +35330,19 @@ var ts;
         }
         return resolutions;
     }
+    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
+        if (options.types) {
+            return options.types;
+        }
+        if (host && host.getDefaultTypeDirectiveNames) {
+            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
+            if (commonRoot) {
+                return host.getDefaultTypeDirectiveNames(commonRoot);
+            }
+        }
+        return undefined;
+    }
+    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
     function createProgram(rootNames, options, host, oldProgram) {
         var program;
         var files = [];
@@ -35224,13 +35378,14 @@ var ts;
         var filesByName = ts.createFileMap();
         var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
         if (!tryReuseStructureFromOldProgram()) {
-            if (options.types && options.types.length) {
-                var resolutions = resolveTypeReferenceDirectiveNamesWorker(options.types, undefined);
-                for (var i = 0; i < options.types.length; i++) {
-                    processTypeReferenceDirective(options.types[i], resolutions[i]);
+            ts.forEach(rootNames, function (name) { return processRootFile(name, false); });
+            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
+            if (typeReferences) {
+                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, undefined);
+                for (var i = 0; i < typeReferences.length; i++) {
+                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
                 }
             }
-            ts.forEach(rootNames, function (name) { return processRootFile(name, false); });
             if (!skipDefaultLib) {
                 if (!options.lib) {
                     processRootFile(host.getDefaultLibFileName(options), true);
@@ -35807,9 +35962,6 @@ var ts;
                 if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
                     reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
                 }
-                if (file_1) {
-                    file_1.wasReferenced = file_1.wasReferenced || isReference;
-                }
                 return file_1;
             }
             var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
@@ -35822,7 +35974,6 @@ var ts;
             });
             filesByName.set(path, file);
             if (file) {
-                file.wasReferenced = file.wasReferenced || isReference;
                 file.path = path;
                 if (host.useCaseSensitiveFileNames()) {
                     var existingFile = filesByNameIgnoreCase.get(path);
@@ -35923,17 +36074,7 @@ var ts;
                         !options.noResolve &&
                         i < file.imports.length;
                     if (shouldAddFile) {
-                        var importedFile = findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), false, false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
-                        if (importedFile && resolution.isExternalLibraryImport) {
-                            if (!ts.isExternalModule(importedFile) && importedFile.statements.length) {
-                                var start_5 = ts.getTokenPosOfNode(file.imports[i], file);
-                                fileProcessingDiagnostics.add(ts.createFileDiagnostic(file, start_5, file.imports[i].end - start_5, ts.Diagnostics.Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition, importedFile.fileName));
-                            }
-                            else if (importedFile.referencedFiles.length) {
-                                var firstRef = importedFile.referencedFiles[0];
-                                fileProcessingDiagnostics.add(ts.createFileDiagnostic(importedFile, firstRef.pos, firstRef.end - firstRef.pos, ts.Diagnostics.Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition));
-                            }
-                        }
+                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), false, false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
                     }
                 }
             }
@@ -36018,7 +36159,7 @@ var ts;
                         }
                     }
                     else {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substututions_for_pattern_0_should_be_an_array, key));
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
                     }
                 }
             }
@@ -36067,13 +36208,19 @@ var ts;
             }
             else if (firstExternalModuleSourceFile && languageVersion < 2 && options.module === ts.ModuleKind.None) {
                 var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting_the_module_compiler_option_in_a_tsconfig_json_file));
+                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
             }
             if (options.module === ts.ModuleKind.ES6 && languageVersion < 2) {
                 programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
             }
-            if (outFile && options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+            if (outFile) {
+                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+                }
+                else if (options.module === undefined && firstExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
+                }
             }
             if (options.outDir ||
                 options.sourceRoot ||
@@ -36156,6 +36303,11 @@ var ts;
             type: "boolean",
             description: ts.Diagnostics.Print_this_message
         },
+        {
+            name: "help",
+            shortName: "?",
+            type: "boolean"
+        },
         {
             name: "init",
             type: "boolean",
@@ -36258,6 +36410,11 @@ var ts;
             name: "skipDefaultLibCheck",
             type: "boolean"
         },
+        {
+            name: "skipLibCheck",
+            type: "boolean",
+            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
+        },
         {
             name: "out",
             type: "string",
diff --git a/lib/tsserver.js b/lib/tsserver.js
index ecb7bfb5509..7eb744a77d3 100644
--- a/lib/tsserver.js
+++ b/lib/tsserver.js
@@ -918,6 +918,10 @@ var ts;
                 }
                 return result.sort();
             }
+            function getDirectories(path) {
+                var folder = fso.GetFolder(path);
+                return getNames(folder.subfolders);
+            }
             function readDirectory(path, extension, exclude) {
                 var result = [];
                 exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
@@ -972,6 +976,7 @@ var ts;
                 getCurrentDirectory: function () {
                     return new ActiveXObject("WScript.Shell").CurrentDirectory;
                 },
+                getDirectories: getDirectories,
                 readDirectory: readDirectory,
                 exit: function (exitCode) {
                     try {
@@ -1119,6 +1124,9 @@ var ts;
             function directoryExists(path) {
                 return fileSystemEntryExists(path, 1);
             }
+            function getDirectories(path) {
+                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1); });
+            }
             function readDirectory(path, extension, exclude) {
                 var result = [];
                 exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
@@ -1211,6 +1219,7 @@ var ts;
                 getCurrentDirectory: function () {
                     return process.cwd();
                 },
+                getDirectories: getDirectories,
                 readDirectory: readDirectory,
                 getModifiedTime: function (path) {
                     try {
@@ -1261,6 +1270,7 @@ var ts;
                 createDirectory: ChakraHost.createDirectory,
                 getExecutingFilePath: function () { return ChakraHost.executingFile; },
                 getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
+                getDirectories: ChakraHost.getDirectories,
                 readDirectory: ChakraHost.readDirectory,
                 exit: ChakraHost.quit,
                 realpath: realpath
@@ -1394,7 +1404,7 @@ var ts;
         or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
         Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
         Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
-        Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting_the_module_compiler_option_in_a_tsconfig_json_file: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting__1148", message: "Cannot compile modules unless the '--module' flag is provided with a valid module type. Consider setting the 'module' compiler option in a 'tsconfig.json' file." },
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
         File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
         new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
         const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
@@ -1764,6 +1774,8 @@ var ts;
         this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
         The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
         The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
+        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
+        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
         Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
         Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
         Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
@@ -1857,7 +1869,7 @@ var ts;
         Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
         Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
         Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
-        Substututions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substututions_for_pattern_0_should_be_an_array_5063", message: "Substututions for pattern '{0}' should be an array." },
+        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
         Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
         Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
         Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
@@ -1870,6 +1882,7 @@ var ts;
         Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
         Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
         Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
+        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
         Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
         Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
         Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
@@ -1971,6 +1984,7 @@ var ts;
         Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
         The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
         Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
         Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
         Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
         Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
@@ -3537,6 +3551,11 @@ var ts;
             type: "boolean",
             description: ts.Diagnostics.Print_this_message
         },
+        {
+            name: "help",
+            shortName: "?",
+            type: "boolean"
+        },
         {
             name: "init",
             type: "boolean",
@@ -3639,6 +3658,11 @@ var ts;
             name: "skipDefaultLibCheck",
             type: "boolean"
         },
+        {
+            name: "skipLibCheck",
+            type: "boolean",
+            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
+        },
         {
             name: "out",
             type: "string",
@@ -5758,7 +5782,7 @@ var ts;
     }
     ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
     function getPropertyNameForPropertyNameNode(name) {
-        if (name.kind === 69 || name.kind === 9 || name.kind === 8) {
+        if (name.kind === 69 || name.kind === 9 || name.kind === 8 || name.kind === 142) {
             return name.text;
         }
         if (name.kind === 140) {
@@ -12804,10 +12828,10 @@ var ts;
                 case 145:
                 case 144:
                 case 266:
-                    return bindPropertyOrMethodOrAccessor(node, 4 | (node.questionToken ? 536870912 : 0), 107455);
+                    return bindPropertyOrMethodOrAccessor(node, 4 | (node.questionToken ? 536870912 : 0), 0);
                 case 253:
                 case 254:
-                    return bindPropertyOrMethodOrAccessor(node, 4, 107455);
+                    return bindPropertyOrMethodOrAccessor(node, 4, 0);
                 case 255:
                     return bindPropertyOrMethodOrAccessor(node, 8, 107455);
                 case 247:
@@ -12819,7 +12843,7 @@ var ts;
                     return declareSymbolAndAddToSymbolTable(node, 131072, 0);
                 case 147:
                 case 146:
-                    return bindPropertyOrMethodOrAccessor(node, 8192 | (node.questionToken ? 536870912 : 0), ts.isObjectLiteralMethod(node) ? 107455 : 99263);
+                    return bindPropertyOrMethodOrAccessor(node, 8192 | (node.questionToken ? 536870912 : 0), ts.isObjectLiteralMethod(node) ? 0 : 99263);
                 case 220:
                     return bindFunctionDeclaration(node);
                 case 148:
@@ -12862,7 +12886,7 @@ var ts;
                 case 238:
                     return declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
                 case 228:
-                    return bindGlobalModuleExportDeclaration(node);
+                    return bindNamespaceExportDeclaration(node);
                 case 231:
                     return bindImportClause(node);
                 case 236:
@@ -12898,13 +12922,13 @@ var ts;
                 bindAnonymousDeclaration(node, 8388608, getDeclarationName(node));
             }
             else if (boundExpression.kind === 69 && node.kind === 235) {
-                declareSymbol(container.symbol.exports, container.symbol, node, 8388608, 107455 | 8388608);
+                declareSymbol(container.symbol.exports, container.symbol, node, 8388608, 0 | 8388608);
             }
             else {
-                declareSymbol(container.symbol.exports, container.symbol, node, 4, 107455 | 8388608);
+                declareSymbol(container.symbol.exports, container.symbol, node, 4, 0 | 8388608);
             }
         }
-        function bindGlobalModuleExportDeclaration(node) {
+        function bindNamespaceExportDeclaration(node) {
             if (node.modifiers && node.modifiers.length) {
                 file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
             }
@@ -12956,7 +12980,7 @@ var ts;
         function bindThisPropertyAssignment(node) {
             if (container.kind === 179 || container.kind === 220) {
                 container.symbol.members = container.symbol.members || {};
-                declareSymbol(container.symbol.members, container.symbol, node, 4, 107455 & ~4);
+                declareSymbol(container.symbol.members, container.symbol, node, 4, 0 & ~4);
             }
         }
         function bindPrototypePropertyAssignment(node) {
@@ -12973,7 +12997,7 @@ var ts;
             if (!funcSymbol.members) {
                 funcSymbol.members = {};
             }
-            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4, 107455);
+            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4, 0);
         }
         function bindCallExpression(node) {
             if (!file.commonJsModuleIndicator && ts.isRequireCall(node, false)) {
@@ -13049,7 +13073,7 @@ var ts;
             }
             if (ts.isParameterPropertyDeclaration(node)) {
                 var classDeclaration = node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4, 107455);
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4, 0);
             }
         }
         function bindFunctionDeclaration(node) {
@@ -13349,7 +13373,7 @@ var ts;
             if (flags & 1)
                 result |= 107454;
             if (flags & 4)
-                result |= 107455;
+                result |= 0;
             if (flags & 8)
                 result |= 107455;
             if (flags & 16)
@@ -13605,6 +13629,7 @@ var ts;
             var propertyWithInvalidInitializer;
             var errorLocation = location;
             var grandparent;
+            var isInExternalModule = false;
             loop: while (location) {
                 if (location.locals && !isGlobalSourceFile(location)) {
                     if (result = getSymbol(location.locals, name, meaning)) {
@@ -13636,6 +13661,7 @@ var ts;
                     case 256:
                         if (!ts.isExternalOrCommonJsModule(location))
                             break;
+                        isInExternalModule = true;
                     case 225:
                         var moduleExports = getSymbolOfNode(location).exports;
                         if (location.kind === 256 || ts.isAmbientModule(location)) {
@@ -13759,6 +13785,12 @@ var ts;
                         checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
                     }
                 }
+                if (result && isInExternalModule) {
+                    var decls = result.declarations;
+                    if (decls && decls.length === 1 && decls[0].kind === 228) {
+                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
+                    }
+                }
             }
             return result;
         }
@@ -15234,7 +15266,7 @@ var ts;
         }
         function getTypeForBindingElementParent(node) {
             var symbol = getSymbolOfNode(node);
-            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, false);
         }
         function getTextOfPropertyName(name) {
             switch (name.kind) {
@@ -15339,7 +15371,7 @@ var ts;
         function addOptionality(type, optional) {
             return strictNullChecks && optional ? addNullableKind(type, 32) : type;
         }
-        function getTypeForVariableLikeDeclaration(declaration) {
+        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
             if (declaration.flags & 134217728) {
                 var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
                 if (type && type !== unknownType) {
@@ -15356,7 +15388,7 @@ var ts;
                 return getTypeForBindingElement(declaration);
             }
             if (declaration.type) {
-                return addOptionality(getTypeFromTypeNode(declaration.type), !!declaration.questionToken);
+                return addOptionality(getTypeFromTypeNode(declaration.type), declaration.questionToken && includeOptionality);
             }
             if (declaration.kind === 142) {
                 var func = declaration.parent;
@@ -15375,11 +15407,11 @@ var ts;
                     ? getContextuallyTypedThisType(func)
                     : getContextuallyTypedParameterType(declaration);
                 if (type) {
-                    return addOptionality(type, !!declaration.questionToken);
+                    return addOptionality(type, declaration.questionToken && includeOptionality);
                 }
             }
             if (declaration.initializer) {
-                return addOptionality(checkExpressionCached(declaration.initializer), !!declaration.questionToken);
+                return addOptionality(checkExpressionCached(declaration.initializer), declaration.questionToken && includeOptionality);
             }
             if (declaration.kind === 254) {
                 return checkIdentifier(declaration.name);
@@ -15447,7 +15479,7 @@ var ts;
                 : getTypeFromArrayBindingPattern(pattern, includePatternInType);
         }
         function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
-            var type = getTypeForVariableLikeDeclaration(declaration);
+            var type = getTypeForVariableLikeDeclaration(declaration, true);
             if (type) {
                 if (reportErrors) {
                     reportErrorsFromWidening(declaration, type);
@@ -17764,7 +17796,7 @@ var ts;
                     return isIdenticalTo(source, target);
                 }
                 if (!(target.flags & 134217728)) {
-                    if (target.flags & 1)
+                    if (target.flags & 1 || source.flags & 134217728)
                         return -1;
                     if (source.flags & 32) {
                         if (!strictNullChecks || target.flags & (32 | 16) || source === emptyArrayElementType)
@@ -17784,7 +17816,7 @@ var ts;
                     if (source.flags & 256 && target === stringType)
                         return -1;
                     if (relation === assignableRelation || relation === comparableRelation) {
-                        if (source.flags & (1 | 134217728))
+                        if (source.flags & 1)
                             return -1;
                         if (source === numberType && target.flags & 128)
                             return -1;
@@ -18561,41 +18593,47 @@ var ts;
                 getSignaturesOfType(type, 0).length === 0 &&
                 getSignaturesOfType(type, 1).length === 0;
         }
+        function createTransientSymbol(source, type) {
+            var symbol = createSymbol(source.flags | 67108864, source.name);
+            symbol.declarations = source.declarations;
+            symbol.parent = source.parent;
+            symbol.type = type;
+            symbol.target = source;
+            if (source.valueDeclaration) {
+                symbol.valueDeclaration = source.valueDeclaration;
+            }
+            return symbol;
+        }
+        function transformTypeOfMembers(type, f) {
+            var members = {};
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var property = _a[_i];
+                var original = getTypeOfSymbol(property);
+                var updated = f(original);
+                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
+            }
+            ;
+            return members;
+        }
         function getRegularTypeOfObjectLiteral(type) {
-            if (type.flags & 1048576) {
-                var regularType = type.regularType;
-                if (!regularType) {
-                    regularType = createType(type.flags & ~1048576);
-                    regularType.symbol = type.symbol;
-                    regularType.members = type.members;
-                    regularType.properties = type.properties;
-                    regularType.callSignatures = type.callSignatures;
-                    regularType.constructSignatures = type.constructSignatures;
-                    regularType.stringIndexInfo = type.stringIndexInfo;
-                    regularType.numberIndexInfo = type.numberIndexInfo;
-                    type.regularType = regularType;
-                }
+            if (!(type.flags & 1048576)) {
+                return type;
+            }
+            var regularType = type.regularType;
+            if (regularType) {
                 return regularType;
             }
-            return type;
+            var resolved = type;
+            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
+            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
+            regularNew.flags = resolved.flags & ~1048576;
+            type.regularType = regularNew;
+            return regularNew;
         }
         function getWidenedTypeOfObjectLiteral(type) {
-            var properties = getPropertiesOfObjectType(type);
-            var members = {};
-            ts.forEach(properties, function (p) {
-                var propType = getTypeOfSymbol(p);
-                var widenedType = getWidenedType(propType);
-                if (propType !== widenedType) {
-                    var symbol = createSymbol(p.flags | 67108864, p.name);
-                    symbol.declarations = p.declarations;
-                    symbol.parent = p.parent;
-                    symbol.type = widenedType;
-                    symbol.target = p;
-                    if (p.valueDeclaration)
-                        symbol.valueDeclaration = p.valueDeclaration;
-                    p = symbol;
-                }
-                members[p.name] = p;
+            var members = transformTypeOfMembers(type, function (prop) {
+                var widened = getWidenedType(prop);
+                return prop === widened ? prop : widened;
             });
             var stringIndexInfo = getIndexInfoOfType(type, 0);
             var numberIndexInfo = getIndexInfoOfType(type, 1);
@@ -19888,7 +19926,7 @@ var ts;
             }
             return nodeCheckFlag === 512
                 ? getBaseConstructorTypeOfClass(classType)
-                : baseClassType;
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
             function isLegalUsageOfSuperExpression(container) {
                 if (!container) {
                     return false;
@@ -21936,7 +21974,7 @@ var ts;
                 var types = void 0;
                 var funcIsGenerator = !!func.asteriskToken;
                 if (funcIsGenerator) {
-                    types = checkAndAggregateYieldOperandTypes(func.body, contextualMapper);
+                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
                     if (types.length === 0) {
                         var iterableIteratorAny = createIterableIteratorType(anyType);
                         if (compilerOptions.noImplicitAny) {
@@ -21946,8 +21984,7 @@ var ts;
                     }
                 }
                 else {
-                    var hasImplicitReturn = !!(func.flags & 32768);
-                    types = checkAndAggregateReturnExpressionTypes(func.body, contextualMapper, isAsync, hasImplicitReturn);
+                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
                     if (!types) {
                         return neverType;
                     }
@@ -21994,9 +22031,9 @@ var ts;
                 return widenedType;
             }
         }
-        function checkAndAggregateYieldOperandTypes(body, contextualMapper) {
+        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
             var aggregatedTypes = [];
-            ts.forEachYieldExpression(body, function (yieldExpression) {
+            ts.forEachYieldExpression(func.body, function (yieldExpression) {
                 var expr = yieldExpression.expression;
                 if (expr) {
                     var type = checkExpressionCached(expr, contextualMapper);
@@ -22010,28 +22047,34 @@ var ts;
             });
             return aggregatedTypes;
         }
-        function checkAndAggregateReturnExpressionTypes(body, contextualMapper, isAsync, hasImplicitReturn) {
+        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
+            var isAsync = ts.isAsyncFunctionLike(func);
             var aggregatedTypes = [];
-            var hasOmittedExpressions = false;
-            ts.forEachReturnStatement(body, function (returnStatement) {
+            var hasReturnWithNoExpression = !!(func.flags & 32768);
+            var hasReturnOfTypeNever = false;
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
                 var expr = returnStatement.expression;
                 if (expr) {
                     var type = checkExpressionCached(expr, contextualMapper);
                     if (isAsync) {
-                        type = checkAwaitedType(type, body.parent, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
                     }
-                    if (type !== neverType && !ts.contains(aggregatedTypes, type)) {
+                    if (type === neverType) {
+                        hasReturnOfTypeNever = true;
+                    }
+                    else if (!ts.contains(aggregatedTypes, type)) {
                         aggregatedTypes.push(type);
                     }
                 }
                 else {
-                    hasOmittedExpressions = true;
+                    hasReturnWithNoExpression = true;
                 }
             });
-            if (aggregatedTypes.length === 0 && !hasOmittedExpressions && !hasImplicitReturn) {
+            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
+                func.kind === 179 || func.kind === 180)) {
                 return undefined;
             }
-            if (strictNullChecks && aggregatedTypes.length && (hasOmittedExpressions || hasImplicitReturn)) {
+            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
                 if (!ts.contains(aggregatedTypes, undefinedType)) {
                     aggregatedTypes.push(undefinedType);
                 }
@@ -22161,7 +22204,9 @@ var ts;
                     (expr.kind === 172 || expr.kind === 173) &&
                     expr.expression.kind === 97) {
                     var func = ts.getContainingFunction(expr);
-                    return !(func && func.kind === 148 && func.parent === symbol.valueDeclaration.parent);
+                    if (!(func && func.kind === 148))
+                        return true;
+                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
                 }
                 return true;
             }
@@ -22985,6 +23030,79 @@ var ts;
                 }
             }
         }
+        function checkClassForDuplicateDeclarations(node) {
+            var getter = 1, setter = 2, property = getter | setter;
+            var instanceNames = {};
+            var staticNames = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 148) {
+                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                        var param = _c[_b];
+                        if (ts.isParameterPropertyDeclaration(param)) {
+                            addName(instanceNames, param.name, param.name.text, property);
+                        }
+                    }
+                }
+                else {
+                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113; });
+                    var names = static ? staticNames : instanceNames;
+                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
+                    if (memberName) {
+                        switch (member.kind) {
+                            case 149:
+                                addName(names, member.name, memberName, getter);
+                                break;
+                            case 150:
+                                addName(names, member.name, memberName, setter);
+                                break;
+                            case 145:
+                                addName(names, member.name, memberName, property);
+                                break;
+                        }
+                    }
+                }
+            }
+            function addName(names, location, name, meaning) {
+                if (ts.hasProperty(names, name)) {
+                    var prev = names[name];
+                    if (prev & meaning) {
+                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                    }
+                    else {
+                        names[name] = prev | meaning;
+                    }
+                }
+                else {
+                    names[name] = meaning;
+                }
+            }
+        }
+        function checkObjectTypeForDuplicateDeclarations(node) {
+            var names = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind == 144) {
+                    var memberName = void 0;
+                    switch (member.name.kind) {
+                        case 9:
+                        case 8:
+                        case 69:
+                            memberName = member.name.text;
+                            break;
+                        default:
+                            continue;
+                    }
+                    if (ts.hasProperty(names, memberName)) {
+                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                    }
+                    else {
+                        names[memberName] = true;
+                    }
+                }
+            }
+        }
         function checkTypeForDuplicateIndexSignatures(node) {
             if (node.kind === 222) {
                 var nodeSymbol = getSymbolOfNode(node);
@@ -23203,6 +23321,7 @@ var ts;
                 var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
                 checkIndexConstraints(type);
                 checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
             }
         }
         function checkArrayType(node) {
@@ -23962,6 +24081,10 @@ var ts;
                 if (node.initializer) {
                     checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, undefined);
                 }
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                }
             }
             if (node.kind !== 145 && node.kind !== 144) {
                 checkExportsOnMergedDeclarations(node);
@@ -23974,6 +24097,18 @@ var ts;
                 checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             }
         }
+        function areDeclarationFlagsIdentical(left, right) {
+            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
+                return false;
+            }
+            var interestingFlags = 8 |
+                16 |
+                256 |
+                128 |
+                64 |
+                32;
+            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
+        }
         function checkVariableDeclaration(node) {
             checkGrammarVariableDeclaration(node);
             return checkVariableLikeDeclaration(node);
@@ -24524,6 +24659,7 @@ var ts;
             var typeWithThis = getTypeWithThisArgument(type);
             var staticType = getTypeOfSymbol(symbol);
             checkTypeParameterListsIdentical(node, symbol);
+            checkClassForDuplicateDeclarations(node);
             var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
             if (baseTypeNode) {
                 var baseTypes = getBaseTypes(type);
@@ -24735,6 +24871,7 @@ var ts;
                         checkIndexConstraints(type);
                     }
                 }
+                checkObjectTypeForDuplicateDeclarations(node);
             }
             ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
                 if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
@@ -25489,10 +25626,8 @@ var ts;
         function checkSourceFileWorker(node) {
             var links = getNodeLinks(node);
             if (!(links.flags & 1)) {
-                if (compilerOptions.skipDefaultLibCheck) {
-                    if (node.hasNoDefaultLib) {
-                        return;
-                    }
+                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
+                    return;
                 }
                 checkGrammarSourceFile(node);
                 potentialThisCollisions.length = 0;
@@ -25861,7 +25996,7 @@ var ts;
                 return symbol && getTypeOfSymbol(symbol);
             }
             if (ts.isBindingPattern(node)) {
-                return getTypeForVariableLikeDeclaration(node.parent);
+                return getTypeForVariableLikeDeclaration(node.parent, true);
             }
             if (isInRightSideOfImportOrExportAssignment(node)) {
                 var symbol = getSymbolAtLocation(node);
@@ -26300,7 +26435,7 @@ var ts;
                 if (file.moduleAugmentations.length) {
                     (augmentations || (augmentations = [])).push(file.moduleAugmentations);
                 }
-                if (file.wasReferenced && file.symbol && file.symbol.globalExports) {
+                if (file.symbol && file.symbol.globalExports) {
                     mergeSymbolTable(globals, file.symbol.globalExports);
                 }
             });
@@ -26870,7 +27005,6 @@ var ts;
                 if (prop.kind === 193 ||
                     name_20.kind === 140) {
                     checkGrammarComputedPropertyName(name_20);
-                    return "continue";
                 }
                 if (prop.kind === 254 && !inDestructuring && prop.objectAssignmentInitializer) {
                     return { value: grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment) };
@@ -26900,17 +27034,21 @@ var ts;
                 else {
                     ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
                 }
-                if (!ts.hasProperty(seen, name_20.text)) {
-                    seen[name_20.text] = currentKind;
+                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_20);
+                if (effectiveName === undefined) {
+                    return "continue";
+                }
+                if (!ts.hasProperty(seen, effectiveName)) {
+                    seen[effectiveName] = currentKind;
                 }
                 else {
-                    var existingKind = seen[name_20.text];
+                    var existingKind = seen[effectiveName];
                     if (currentKind === Property && existingKind === Property) {
-                        return "continue";
+                        grammarErrorOnNode(name_20, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_20));
                     }
                     else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
                         if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[name_20.text] = currentKind | existingKind;
+                            seen[effectiveName] = currentKind | existingKind;
                         }
                         else {
                             return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
@@ -35367,7 +35505,7 @@ var ts;
             skipTsx: true,
             traceEnabled: traceEnabled
         };
-        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : undefined);
+        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
         if (traceEnabled) {
             if (containingFile === undefined) {
                 if (rootDir === undefined) {
@@ -35870,12 +36008,25 @@ var ts;
                 }
             }
         }
+        function getDefaultTypeDirectiveNames(rootPath) {
+            var localTypes = ts.combinePaths(rootPath, "types");
+            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
+            var result = [];
+            if (ts.sys.directoryExists(localTypes)) {
+                result = result.concat(ts.sys.getDirectories(localTypes));
+            }
+            if (ts.sys.directoryExists(npmTypes)) {
+                result = result.concat(ts.sys.getDirectories(npmTypes));
+            }
+            return result;
+        }
         function getDefaultLibLocation() {
             return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
         }
         var newLine = ts.getNewLineCharacter(options);
         var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
         return {
+            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
             getSourceFile: getSourceFile,
             getDefaultLibLocation: getDefaultLibLocation,
             getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
@@ -35943,6 +36094,19 @@ var ts;
         }
         return resolutions;
     }
+    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
+        if (options.types) {
+            return options.types;
+        }
+        if (host && host.getDefaultTypeDirectiveNames) {
+            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
+            if (commonRoot) {
+                return host.getDefaultTypeDirectiveNames(commonRoot);
+            }
+        }
+        return undefined;
+    }
+    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
     function createProgram(rootNames, options, host, oldProgram) {
         var program;
         var files = [];
@@ -35978,13 +36142,14 @@ var ts;
         var filesByName = ts.createFileMap();
         var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
         if (!tryReuseStructureFromOldProgram()) {
-            if (options.types && options.types.length) {
-                var resolutions = resolveTypeReferenceDirectiveNamesWorker(options.types, undefined);
-                for (var i = 0; i < options.types.length; i++) {
-                    processTypeReferenceDirective(options.types[i], resolutions[i]);
+            ts.forEach(rootNames, function (name) { return processRootFile(name, false); });
+            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
+            if (typeReferences) {
+                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, undefined);
+                for (var i = 0; i < typeReferences.length; i++) {
+                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
                 }
             }
-            ts.forEach(rootNames, function (name) { return processRootFile(name, false); });
             if (!skipDefaultLib) {
                 if (!options.lib) {
                     processRootFile(host.getDefaultLibFileName(options), true);
@@ -36561,9 +36726,6 @@ var ts;
                 if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
                     reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
                 }
-                if (file_1) {
-                    file_1.wasReferenced = file_1.wasReferenced || isReference;
-                }
                 return file_1;
             }
             var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
@@ -36576,7 +36738,6 @@ var ts;
             });
             filesByName.set(path, file);
             if (file) {
-                file.wasReferenced = file.wasReferenced || isReference;
                 file.path = path;
                 if (host.useCaseSensitiveFileNames()) {
                     var existingFile = filesByNameIgnoreCase.get(path);
@@ -36677,17 +36838,7 @@ var ts;
                         !options.noResolve &&
                         i < file.imports.length;
                     if (shouldAddFile) {
-                        var importedFile = findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), false, false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
-                        if (importedFile && resolution.isExternalLibraryImport) {
-                            if (!ts.isExternalModule(importedFile) && importedFile.statements.length) {
-                                var start_5 = ts.getTokenPosOfNode(file.imports[i], file);
-                                fileProcessingDiagnostics.add(ts.createFileDiagnostic(file, start_5, file.imports[i].end - start_5, ts.Diagnostics.Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition, importedFile.fileName));
-                            }
-                            else if (importedFile.referencedFiles.length) {
-                                var firstRef = importedFile.referencedFiles[0];
-                                fileProcessingDiagnostics.add(ts.createFileDiagnostic(importedFile, firstRef.pos, firstRef.end - firstRef.pos, ts.Diagnostics.Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition));
-                            }
-                        }
+                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), false, false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
                     }
                 }
             }
@@ -36772,7 +36923,7 @@ var ts;
                         }
                     }
                     else {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substututions_for_pattern_0_should_be_an_array, key));
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
                     }
                 }
             }
@@ -36821,13 +36972,19 @@ var ts;
             }
             else if (firstExternalModuleSourceFile && languageVersion < 2 && options.module === ts.ModuleKind.None) {
                 var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting_the_module_compiler_option_in_a_tsconfig_json_file));
+                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
             }
             if (options.module === ts.ModuleKind.ES6 && languageVersion < 2) {
                 programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
             }
-            if (outFile && options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+            if (outFile) {
+                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+                }
+                else if (options.module === undefined && firstExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
+                }
             }
             if (options.outDir ||
                 options.sourceRoot ||
@@ -37517,7 +37674,7 @@ var ts;
 (function (ts) {
     var NavigateTo;
     (function (NavigateTo) {
-        function getNavigateToItems(program, cancellationToken, searchValue, maxResultCount) {
+        function getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount) {
             var patternMatcher = ts.createPatternMatcher(searchValue);
             var rawItems = [];
             var baseSensitivity = { sensitivity: "base" };
@@ -37550,6 +37707,17 @@ var ts;
                     }
                 }
             });
+            rawItems = ts.filter(rawItems, function (item) {
+                var decl = item.declaration;
+                if (decl.kind === 231 || decl.kind === 234 || decl.kind === 229) {
+                    var importer = checker.getSymbolAtLocation(decl.name);
+                    var imported = checker.getAliasedSymbol(importer);
+                    return importer.name !== imported.name;
+                }
+                else {
+                    return true;
+                }
+            });
             rawItems.sort(compareNavigateToItems);
             if (maxResultCount !== undefined) {
                 rawItems = rawItems.slice(0, maxResultCount);
@@ -37892,8 +38060,12 @@ var ts;
                         return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberSetAccessorElement);
                     case 153:
                         return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
+                    case 224:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.enumElement);
                     case 255:
                         return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 222:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.interfaceElement);
                     case 151:
                         return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
                     case 152:
@@ -39263,7 +39435,7 @@ var ts;
             }
         }
         function findRightmostChildNodeWithTokens(children, exclusiveStartPosition) {
-            for (var i = exclusiveStartPosition - 1; i >= 0; --i) {
+            for (var i = exclusiveStartPosition - 1; i >= 0; i--) {
                 if (nodeHasTokens(children[i])) {
                     return children[i];
                 }
@@ -39889,18 +40061,17 @@ var ts;
                 if (!isStarted) {
                     scanner.scan();
                 }
-                var t;
                 var pos = scanner.getStartPos();
                 while (pos < endPos) {
-                    var t_1 = scanner.getToken();
-                    if (!ts.isTrivia(t_1)) {
+                    var t = scanner.getToken();
+                    if (!ts.isTrivia(t)) {
                         break;
                     }
                     scanner.scan();
                     var item = {
                         pos: pos,
                         end: scanner.getStartPos(),
-                        kind: t_1
+                        kind: t
                     };
                     pos = scanner.getStartPos();
                     if (!leadingTrivia) {
@@ -41550,7 +41721,7 @@ var ts;
                 else {
                     parts = [];
                     var startPos = commentRange.pos;
-                    for (var line = startLine; line < endLine; ++line) {
+                    for (var line = startLine; line < endLine; line++) {
                         var endOfLine = ts.getEndLinePosition(line, sourceFile);
                         parts.push({ pos: startPos, end: endOfLine });
                         startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
@@ -41568,7 +41739,7 @@ var ts;
                     startLine++;
                 }
                 var delta = indentation - nonWhitespaceColumnInFirstPart.column;
-                for (var i = startIndex, len = parts.length; i < len; ++i, ++startLine) {
+                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
                     var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
                     var nonWhitespaceCharacterAndColumn = i === 0
                         ? nonWhitespaceColumnInFirstPart
@@ -41584,7 +41755,7 @@ var ts;
                 }
             }
             function trimTrailingWhitespacesForLines(line1, line2, range) {
-                for (var line = line1; line < line2; ++line) {
+                for (var line = line1; line < line2; line++) {
                     var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
                     var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
                     if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
@@ -41627,7 +41798,6 @@ var ts;
                 }
             }
             function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
-                var between;
                 switch (rule.Operation.Action) {
                     case 1:
                         return;
@@ -41657,14 +41827,6 @@ var ts;
                 }
             }
         }
-        function isSomeBlock(kind) {
-            switch (kind) {
-                case 199:
-                case 226:
-                    return true;
-            }
-            return false;
-        }
         function getOpenTokenForList(node, list) {
             switch (node.kind) {
                 case 148:
@@ -41722,7 +41884,7 @@ var ts;
                     internedTabsIndentation = [];
                 }
                 if (internedTabsIndentation[tabs] === undefined) {
-                    internedTabsIndentation[tabs] = tabString = repeat('\t', tabs);
+                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
                 }
                 else {
                     tabString = internedTabsIndentation[tabs];
@@ -41747,7 +41909,7 @@ var ts;
             }
             function repeat(value, count) {
                 var s = "";
-                for (var i = 0; i < count; ++i) {
+                for (var i = 0; i < count; i++) {
                     s += value;
                 }
                 return s;
@@ -42015,7 +42177,7 @@ var ts;
                 ts.Debug.assert(index >= 0 && index < list.length);
                 var node = list[index];
                 var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
-                for (var i = index - 1; i >= 0; --i) {
+                for (var i = index - 1; i >= 0; i--) {
                     if (list[i].kind === 24) {
                         continue;
                     }
@@ -42034,7 +42196,7 @@ var ts;
             function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
                 var character = 0;
                 var column = 0;
-                for (var pos = startPos; pos < endPos; ++pos) {
+                for (var pos = startPos; pos < endPos; pos++) {
                     var ch = sourceFile.text.charCodeAt(pos);
                     if (!ts.isWhiteSpace(ch)) {
                         break;
@@ -44005,9 +44167,9 @@ var ts;
             log("getCompletionData: Get previous token 1: " + (new Date().getTime() - start));
             var contextToken = previousToken;
             if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
-                var start_6 = new Date().getTime();
+                var start_5 = new Date().getTime();
                 contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
-                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_6));
+                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_5));
             }
             var node = currentToken;
             var isRightOfDot = false;
@@ -44234,9 +44396,9 @@ var ts;
                     || contextToken.kind === 166
                     || contextToken.kind === 10
                     || ts.isTemplateLiteralKind(contextToken.kind)) {
-                    var start_7 = contextToken.getStart();
+                    var start_6 = contextToken.getStart();
                     var end = contextToken.getEnd();
-                    if (start_7 < position && position < end) {
+                    if (start_6 < position && position < end) {
                         return true;
                     }
                     if (position === end) {
@@ -45314,8 +45476,7 @@ var ts;
         }
         function getDocumentHighlights(fileName, position, filesToSearch) {
             synchronizeHostData();
-            filesToSearch = ts.map(filesToSearch, ts.normalizeSlashes);
-            var sourceFilesToSearch = ts.filter(program.getSourceFiles(), function (f) { return ts.contains(filesToSearch, f.fileName); });
+            var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
             var sourceFile = getValidSourceFile(fileName);
             var node = ts.getTouchingWord(sourceFile, position);
             if (!node) {
@@ -46498,7 +46659,8 @@ var ts;
         }
         function getNavigateToItems(searchValue, maxResultCount) {
             synchronizeHostData();
-            return ts.NavigateTo.getNavigateToItems(program, cancellationToken, searchValue, maxResultCount);
+            var checker = getProgram().getTypeChecker();
+            return ts.NavigateTo.getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount);
         }
         function getEmitOutput(fileName) {
             synchronizeHostData();
@@ -51195,6 +51357,9 @@ var ts;
         LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
             return this.shimHost.getCurrentDirectory();
         };
+        LanguageServiceShimHostAdapter.prototype.getDirectories = function (path) {
+            return this.shimHost.getDirectories(path);
+        };
         LanguageServiceShimHostAdapter.prototype.getDefaultLibFileName = function (options) {
             return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
         };
diff --git a/lib/tsserverlibrary.d.ts b/lib/tsserverlibrary.d.ts
index 0629ad983a3..76b66dda93b 100644
--- a/lib/tsserverlibrary.d.ts
+++ b/lib/tsserverlibrary.d.ts
@@ -247,7 +247,7 @@ declare namespace ts {
         ModuleDeclaration = 225,
         ModuleBlock = 226,
         CaseBlock = 227,
-        GlobalModuleExportDeclaration = 228,
+        NamespaceExportDeclaration = 228,
         ImportEqualsDeclaration = 229,
         ImportDeclaration = 230,
         ImportClause = 231,
@@ -925,7 +925,7 @@ declare namespace ts {
     interface NamespaceImport extends Declaration {
         name: Identifier;
     }
-    interface GlobalModuleExportDeclaration extends DeclarationStatement {
+    interface NamespaceExportDeclaration extends DeclarationStatement {
         name: Identifier;
         moduleReference: LiteralLikeNode;
     }
@@ -1087,7 +1087,6 @@ declare namespace ts {
         scriptKind: ScriptKind;
         externalModuleIndicator: Node;
         commonJsModuleIndicator: Node;
-        wasReferenced?: boolean;
         identifiers: Map<string>;
         nodeCount: number;
         identifierCount: number;
@@ -1381,7 +1380,7 @@ declare namespace ts {
         FunctionScopedVariableExcludes = 107454,
         BlockScopedVariableExcludes = 107455,
         ParameterExcludes = 107455,
-        PropertyExcludes = 107455,
+        PropertyExcludes = 0,
         EnumMemberExcludes = 107455,
         FunctionExcludes = 106927,
         ClassExcludes = 899519,
@@ -1735,6 +1734,7 @@ declare namespace ts {
         allowJs?: boolean;
         noImplicitUseStrict?: boolean;
         strictNullChecks?: boolean;
+        skipLibCheck?: boolean;
         listEmittedFiles?: boolean;
         lib?: string[];
         stripInternal?: boolean;
@@ -1967,6 +1967,7 @@ declare namespace ts {
         trace?(s: string): void;
         directoryExists?(directoryName: string): boolean;
         realpath?(path: string): string;
+        getCurrentDirectory?(): string;
     }
     interface ResolvedModule {
         resolvedFileName: string;
@@ -1990,6 +1991,7 @@ declare namespace ts {
         getCancellationToken?(): CancellationToken;
         getDefaultLibFileName(options: CompilerOptions): string;
         getDefaultLibLocation?(): string;
+        getDefaultTypeDirectiveNames?(rootPath: string): string[];
         writeFile: WriteFileCallback;
         getCurrentDirectory(): string;
         getCanonicalFileName(fileName: string): string;
@@ -2136,6 +2138,7 @@ declare namespace ts {
         createDirectory(path: string): void;
         getExecutingFilePath(): string;
         getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
         readDirectory(path: string, extension?: string, exclude?: string[]): string[];
         getModifiedTime?(path: string): Date;
         createHash?(data: string): string;
@@ -2820,7 +2823,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting_the_module_compiler_option_in_a_tsconfig_json_file: {
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5040,6 +5043,18 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        Identifier_0_must_be_imported_from_a_module: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        All_declarations_of_0_must_have_identical_modifiers: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         Import_declaration_0_is_using_private_name_1: {
             code: number;
             category: DiagnosticCategory;
@@ -5598,7 +5613,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Substututions_for_pattern_0_should_be_an_array: {
+        Substitutions_for_pattern_0_should_be_an_array: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -5676,6 +5691,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        Skip_type_checking_of_declaration_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: {
             code: number;
             category: DiagnosticCategory;
@@ -6282,6 +6303,12 @@ declare namespace ts {
             key: string;
             message: string;
         };
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
         Variable_0_implicitly_has_an_1_type: {
             code: number;
             category: DiagnosticCategory;
@@ -7024,6 +7051,7 @@ declare namespace ts {
     function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
     function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
     function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
+    function getDefaultTypeDirectiveNames(options: CompilerOptions, rootFiles: string[], host: CompilerHost): string[];
     function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program;
 }
 declare namespace ts.BreakpointResolver {
@@ -7033,7 +7061,7 @@ declare namespace ts.OutliningElementsCollector {
     function collectElements(sourceFile: SourceFile): OutliningSpan[];
 }
 declare namespace ts.NavigateTo {
-    function getNavigateToItems(program: Program, cancellationToken: CancellationToken, searchValue: string, maxResultCount: number): NavigateToItem[];
+    function getNavigateToItems(program: Program, checker: TypeChecker, cancellationToken: CancellationToken, searchValue: string, maxResultCount: number): NavigateToItem[];
 }
 declare namespace ts.NavigationBar {
     function getNavigationBarItems(sourceFile: SourceFile, compilerOptions: CompilerOptions): ts.NavigationBarItem[];
@@ -7431,7 +7459,7 @@ declare namespace ts.formatting {
     }
 }
 declare namespace ts.formatting {
-    module Shared {
+    namespace Shared {
         interface ITokenAccess {
             GetTokens(): SyntaxKind[];
             Contains(token: SyntaxKind): boolean;
@@ -7516,7 +7544,7 @@ declare namespace ts.formatting {
     function getIndentationString(indentation: number, options: FormatCodeOptions): string;
 }
 declare namespace ts.formatting {
-    module SmartIndenter {
+    namespace SmartIndenter {
         function getIndentation(position: number, sourceFile: SourceFile, options: EditorOptions): number;
         function getIndentationForNode(n: Node, ignoreActualIndentationRange: TextRange, sourceFile: SourceFile, options: FormatCodeOptions): number;
         function childStartsOnTheSameLineWithElseInIfStatement(parent: Node, child: TextRangeWithKind, childStartLine: number, sourceFile: SourceFile): boolean;
@@ -8487,6 +8515,7 @@ declare namespace ts {
         getLocalizedDiagnosticMessages(): string;
         getCancellationToken(): HostCancellationToken;
         getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
         getDefaultLibFileName(options: string): string;
         getNewLine?(): string;
         getProjectVersion?(): string;
@@ -8582,6 +8611,7 @@ declare namespace ts {
         getLocalizedDiagnosticMessages(): any;
         getCancellationToken(): HostCancellationToken;
         getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
         getDefaultLibFileName(options: CompilerOptions): string;
     }
     class CoreServicesShimHostAdapter implements ParseConfigHost, ModuleResolutionHost {
diff --git a/lib/tsserverlibrary.js b/lib/tsserverlibrary.js
index 050d9ca265d..902bfcf610e 100644
--- a/lib/tsserverlibrary.js
+++ b/lib/tsserverlibrary.js
@@ -918,6 +918,10 @@ var ts;
                 }
                 return result.sort();
             }
+            function getDirectories(path) {
+                var folder = fso.GetFolder(path);
+                return getNames(folder.subfolders);
+            }
             function readDirectory(path, extension, exclude) {
                 var result = [];
                 exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
@@ -972,6 +976,7 @@ var ts;
                 getCurrentDirectory: function () {
                     return new ActiveXObject("WScript.Shell").CurrentDirectory;
                 },
+                getDirectories: getDirectories,
                 readDirectory: readDirectory,
                 exit: function (exitCode) {
                     try {
@@ -1119,6 +1124,9 @@ var ts;
             function directoryExists(path) {
                 return fileSystemEntryExists(path, 1);
             }
+            function getDirectories(path) {
+                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1); });
+            }
             function readDirectory(path, extension, exclude) {
                 var result = [];
                 exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
@@ -1211,6 +1219,7 @@ var ts;
                 getCurrentDirectory: function () {
                     return process.cwd();
                 },
+                getDirectories: getDirectories,
                 readDirectory: readDirectory,
                 getModifiedTime: function (path) {
                     try {
@@ -1261,6 +1270,7 @@ var ts;
                 createDirectory: ChakraHost.createDirectory,
                 getExecutingFilePath: function () { return ChakraHost.executingFile; },
                 getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
+                getDirectories: ChakraHost.getDirectories,
                 readDirectory: ChakraHost.readDirectory,
                 exit: ChakraHost.quit,
                 realpath: realpath
@@ -1394,7 +1404,7 @@ var ts;
         or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
         Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
         Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
-        Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting_the_module_compiler_option_in_a_tsconfig_json_file: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting__1148", message: "Cannot compile modules unless the '--module' flag is provided with a valid module type. Consider setting the 'module' compiler option in a 'tsconfig.json' file." },
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
         File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
         new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
         const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
@@ -1764,6 +1774,8 @@ var ts;
         this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
         The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
         The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
+        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
+        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
         Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
         Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
         Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
@@ -1857,7 +1869,7 @@ var ts;
         Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
         Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
         Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
-        Substututions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substututions_for_pattern_0_should_be_an_array_5063", message: "Substututions for pattern '{0}' should be an array." },
+        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
         Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
         Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
         Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
@@ -1870,6 +1882,7 @@ var ts;
         Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
         Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
         Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
+        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
         Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
         Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
         Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
@@ -1971,6 +1984,7 @@ var ts;
         Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
         The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
         Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
         Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
         Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
         Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
@@ -3537,6 +3551,11 @@ var ts;
             type: "boolean",
             description: ts.Diagnostics.Print_this_message
         },
+        {
+            name: "help",
+            shortName: "?",
+            type: "boolean"
+        },
         {
             name: "init",
             type: "boolean",
@@ -3639,6 +3658,11 @@ var ts;
             name: "skipDefaultLibCheck",
             type: "boolean"
         },
+        {
+            name: "skipLibCheck",
+            type: "boolean",
+            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
+        },
         {
             name: "out",
             type: "string",
@@ -5758,7 +5782,7 @@ var ts;
     }
     ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
     function getPropertyNameForPropertyNameNode(name) {
-        if (name.kind === 69 || name.kind === 9 || name.kind === 8) {
+        if (name.kind === 69 || name.kind === 9 || name.kind === 8 || name.kind === 142) {
             return name.text;
         }
         if (name.kind === 140) {
@@ -12804,10 +12828,10 @@ var ts;
                 case 145:
                 case 144:
                 case 266:
-                    return bindPropertyOrMethodOrAccessor(node, 4 | (node.questionToken ? 536870912 : 0), 107455);
+                    return bindPropertyOrMethodOrAccessor(node, 4 | (node.questionToken ? 536870912 : 0), 0);
                 case 253:
                 case 254:
-                    return bindPropertyOrMethodOrAccessor(node, 4, 107455);
+                    return bindPropertyOrMethodOrAccessor(node, 4, 0);
                 case 255:
                     return bindPropertyOrMethodOrAccessor(node, 8, 107455);
                 case 247:
@@ -12819,7 +12843,7 @@ var ts;
                     return declareSymbolAndAddToSymbolTable(node, 131072, 0);
                 case 147:
                 case 146:
-                    return bindPropertyOrMethodOrAccessor(node, 8192 | (node.questionToken ? 536870912 : 0), ts.isObjectLiteralMethod(node) ? 107455 : 99263);
+                    return bindPropertyOrMethodOrAccessor(node, 8192 | (node.questionToken ? 536870912 : 0), ts.isObjectLiteralMethod(node) ? 0 : 99263);
                 case 220:
                     return bindFunctionDeclaration(node);
                 case 148:
@@ -12862,7 +12886,7 @@ var ts;
                 case 238:
                     return declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
                 case 228:
-                    return bindGlobalModuleExportDeclaration(node);
+                    return bindNamespaceExportDeclaration(node);
                 case 231:
                     return bindImportClause(node);
                 case 236:
@@ -12898,13 +12922,13 @@ var ts;
                 bindAnonymousDeclaration(node, 8388608, getDeclarationName(node));
             }
             else if (boundExpression.kind === 69 && node.kind === 235) {
-                declareSymbol(container.symbol.exports, container.symbol, node, 8388608, 107455 | 8388608);
+                declareSymbol(container.symbol.exports, container.symbol, node, 8388608, 0 | 8388608);
             }
             else {
-                declareSymbol(container.symbol.exports, container.symbol, node, 4, 107455 | 8388608);
+                declareSymbol(container.symbol.exports, container.symbol, node, 4, 0 | 8388608);
             }
         }
-        function bindGlobalModuleExportDeclaration(node) {
+        function bindNamespaceExportDeclaration(node) {
             if (node.modifiers && node.modifiers.length) {
                 file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
             }
@@ -12956,7 +12980,7 @@ var ts;
         function bindThisPropertyAssignment(node) {
             if (container.kind === 179 || container.kind === 220) {
                 container.symbol.members = container.symbol.members || {};
-                declareSymbol(container.symbol.members, container.symbol, node, 4, 107455 & ~4);
+                declareSymbol(container.symbol.members, container.symbol, node, 4, 0 & ~4);
             }
         }
         function bindPrototypePropertyAssignment(node) {
@@ -12973,7 +12997,7 @@ var ts;
             if (!funcSymbol.members) {
                 funcSymbol.members = {};
             }
-            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4, 107455);
+            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4, 0);
         }
         function bindCallExpression(node) {
             if (!file.commonJsModuleIndicator && ts.isRequireCall(node, false)) {
@@ -13049,7 +13073,7 @@ var ts;
             }
             if (ts.isParameterPropertyDeclaration(node)) {
                 var classDeclaration = node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4, 107455);
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4, 0);
             }
         }
         function bindFunctionDeclaration(node) {
@@ -13349,7 +13373,7 @@ var ts;
             if (flags & 1)
                 result |= 107454;
             if (flags & 4)
-                result |= 107455;
+                result |= 0;
             if (flags & 8)
                 result |= 107455;
             if (flags & 16)
@@ -13605,6 +13629,7 @@ var ts;
             var propertyWithInvalidInitializer;
             var errorLocation = location;
             var grandparent;
+            var isInExternalModule = false;
             loop: while (location) {
                 if (location.locals && !isGlobalSourceFile(location)) {
                     if (result = getSymbol(location.locals, name, meaning)) {
@@ -13636,6 +13661,7 @@ var ts;
                     case 256:
                         if (!ts.isExternalOrCommonJsModule(location))
                             break;
+                        isInExternalModule = true;
                     case 225:
                         var moduleExports = getSymbolOfNode(location).exports;
                         if (location.kind === 256 || ts.isAmbientModule(location)) {
@@ -13759,6 +13785,12 @@ var ts;
                         checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
                     }
                 }
+                if (result && isInExternalModule) {
+                    var decls = result.declarations;
+                    if (decls && decls.length === 1 && decls[0].kind === 228) {
+                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
+                    }
+                }
             }
             return result;
         }
@@ -15234,7 +15266,7 @@ var ts;
         }
         function getTypeForBindingElementParent(node) {
             var symbol = getSymbolOfNode(node);
-            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, false);
         }
         function getTextOfPropertyName(name) {
             switch (name.kind) {
@@ -15339,7 +15371,7 @@ var ts;
         function addOptionality(type, optional) {
             return strictNullChecks && optional ? addNullableKind(type, 32) : type;
         }
-        function getTypeForVariableLikeDeclaration(declaration) {
+        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
             if (declaration.flags & 134217728) {
                 var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
                 if (type && type !== unknownType) {
@@ -15356,7 +15388,7 @@ var ts;
                 return getTypeForBindingElement(declaration);
             }
             if (declaration.type) {
-                return addOptionality(getTypeFromTypeNode(declaration.type), !!declaration.questionToken);
+                return addOptionality(getTypeFromTypeNode(declaration.type), declaration.questionToken && includeOptionality);
             }
             if (declaration.kind === 142) {
                 var func = declaration.parent;
@@ -15375,11 +15407,11 @@ var ts;
                     ? getContextuallyTypedThisType(func)
                     : getContextuallyTypedParameterType(declaration);
                 if (type) {
-                    return addOptionality(type, !!declaration.questionToken);
+                    return addOptionality(type, declaration.questionToken && includeOptionality);
                 }
             }
             if (declaration.initializer) {
-                return addOptionality(checkExpressionCached(declaration.initializer), !!declaration.questionToken);
+                return addOptionality(checkExpressionCached(declaration.initializer), declaration.questionToken && includeOptionality);
             }
             if (declaration.kind === 254) {
                 return checkIdentifier(declaration.name);
@@ -15447,7 +15479,7 @@ var ts;
                 : getTypeFromArrayBindingPattern(pattern, includePatternInType);
         }
         function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
-            var type = getTypeForVariableLikeDeclaration(declaration);
+            var type = getTypeForVariableLikeDeclaration(declaration, true);
             if (type) {
                 if (reportErrors) {
                     reportErrorsFromWidening(declaration, type);
@@ -17764,7 +17796,7 @@ var ts;
                     return isIdenticalTo(source, target);
                 }
                 if (!(target.flags & 134217728)) {
-                    if (target.flags & 1)
+                    if (target.flags & 1 || source.flags & 134217728)
                         return -1;
                     if (source.flags & 32) {
                         if (!strictNullChecks || target.flags & (32 | 16) || source === emptyArrayElementType)
@@ -17784,7 +17816,7 @@ var ts;
                     if (source.flags & 256 && target === stringType)
                         return -1;
                     if (relation === assignableRelation || relation === comparableRelation) {
-                        if (source.flags & (1 | 134217728))
+                        if (source.flags & 1)
                             return -1;
                         if (source === numberType && target.flags & 128)
                             return -1;
@@ -18561,41 +18593,47 @@ var ts;
                 getSignaturesOfType(type, 0).length === 0 &&
                 getSignaturesOfType(type, 1).length === 0;
         }
+        function createTransientSymbol(source, type) {
+            var symbol = createSymbol(source.flags | 67108864, source.name);
+            symbol.declarations = source.declarations;
+            symbol.parent = source.parent;
+            symbol.type = type;
+            symbol.target = source;
+            if (source.valueDeclaration) {
+                symbol.valueDeclaration = source.valueDeclaration;
+            }
+            return symbol;
+        }
+        function transformTypeOfMembers(type, f) {
+            var members = {};
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var property = _a[_i];
+                var original = getTypeOfSymbol(property);
+                var updated = f(original);
+                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
+            }
+            ;
+            return members;
+        }
         function getRegularTypeOfObjectLiteral(type) {
-            if (type.flags & 1048576) {
-                var regularType = type.regularType;
-                if (!regularType) {
-                    regularType = createType(type.flags & ~1048576);
-                    regularType.symbol = type.symbol;
-                    regularType.members = type.members;
-                    regularType.properties = type.properties;
-                    regularType.callSignatures = type.callSignatures;
-                    regularType.constructSignatures = type.constructSignatures;
-                    regularType.stringIndexInfo = type.stringIndexInfo;
-                    regularType.numberIndexInfo = type.numberIndexInfo;
-                    type.regularType = regularType;
-                }
+            if (!(type.flags & 1048576)) {
+                return type;
+            }
+            var regularType = type.regularType;
+            if (regularType) {
                 return regularType;
             }
-            return type;
+            var resolved = type;
+            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
+            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
+            regularNew.flags = resolved.flags & ~1048576;
+            type.regularType = regularNew;
+            return regularNew;
         }
         function getWidenedTypeOfObjectLiteral(type) {
-            var properties = getPropertiesOfObjectType(type);
-            var members = {};
-            ts.forEach(properties, function (p) {
-                var propType = getTypeOfSymbol(p);
-                var widenedType = getWidenedType(propType);
-                if (propType !== widenedType) {
-                    var symbol = createSymbol(p.flags | 67108864, p.name);
-                    symbol.declarations = p.declarations;
-                    symbol.parent = p.parent;
-                    symbol.type = widenedType;
-                    symbol.target = p;
-                    if (p.valueDeclaration)
-                        symbol.valueDeclaration = p.valueDeclaration;
-                    p = symbol;
-                }
-                members[p.name] = p;
+            var members = transformTypeOfMembers(type, function (prop) {
+                var widened = getWidenedType(prop);
+                return prop === widened ? prop : widened;
             });
             var stringIndexInfo = getIndexInfoOfType(type, 0);
             var numberIndexInfo = getIndexInfoOfType(type, 1);
@@ -19888,7 +19926,7 @@ var ts;
             }
             return nodeCheckFlag === 512
                 ? getBaseConstructorTypeOfClass(classType)
-                : baseClassType;
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
             function isLegalUsageOfSuperExpression(container) {
                 if (!container) {
                     return false;
@@ -21936,7 +21974,7 @@ var ts;
                 var types = void 0;
                 var funcIsGenerator = !!func.asteriskToken;
                 if (funcIsGenerator) {
-                    types = checkAndAggregateYieldOperandTypes(func.body, contextualMapper);
+                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
                     if (types.length === 0) {
                         var iterableIteratorAny = createIterableIteratorType(anyType);
                         if (compilerOptions.noImplicitAny) {
@@ -21946,8 +21984,7 @@ var ts;
                     }
                 }
                 else {
-                    var hasImplicitReturn = !!(func.flags & 32768);
-                    types = checkAndAggregateReturnExpressionTypes(func.body, contextualMapper, isAsync, hasImplicitReturn);
+                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
                     if (!types) {
                         return neverType;
                     }
@@ -21994,9 +22031,9 @@ var ts;
                 return widenedType;
             }
         }
-        function checkAndAggregateYieldOperandTypes(body, contextualMapper) {
+        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
             var aggregatedTypes = [];
-            ts.forEachYieldExpression(body, function (yieldExpression) {
+            ts.forEachYieldExpression(func.body, function (yieldExpression) {
                 var expr = yieldExpression.expression;
                 if (expr) {
                     var type = checkExpressionCached(expr, contextualMapper);
@@ -22010,28 +22047,34 @@ var ts;
             });
             return aggregatedTypes;
         }
-        function checkAndAggregateReturnExpressionTypes(body, contextualMapper, isAsync, hasImplicitReturn) {
+        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
+            var isAsync = ts.isAsyncFunctionLike(func);
             var aggregatedTypes = [];
-            var hasOmittedExpressions = false;
-            ts.forEachReturnStatement(body, function (returnStatement) {
+            var hasReturnWithNoExpression = !!(func.flags & 32768);
+            var hasReturnOfTypeNever = false;
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
                 var expr = returnStatement.expression;
                 if (expr) {
                     var type = checkExpressionCached(expr, contextualMapper);
                     if (isAsync) {
-                        type = checkAwaitedType(type, body.parent, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
                     }
-                    if (type !== neverType && !ts.contains(aggregatedTypes, type)) {
+                    if (type === neverType) {
+                        hasReturnOfTypeNever = true;
+                    }
+                    else if (!ts.contains(aggregatedTypes, type)) {
                         aggregatedTypes.push(type);
                     }
                 }
                 else {
-                    hasOmittedExpressions = true;
+                    hasReturnWithNoExpression = true;
                 }
             });
-            if (aggregatedTypes.length === 0 && !hasOmittedExpressions && !hasImplicitReturn) {
+            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
+                func.kind === 179 || func.kind === 180)) {
                 return undefined;
             }
-            if (strictNullChecks && aggregatedTypes.length && (hasOmittedExpressions || hasImplicitReturn)) {
+            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
                 if (!ts.contains(aggregatedTypes, undefinedType)) {
                     aggregatedTypes.push(undefinedType);
                 }
@@ -22161,7 +22204,9 @@ var ts;
                     (expr.kind === 172 || expr.kind === 173) &&
                     expr.expression.kind === 97) {
                     var func = ts.getContainingFunction(expr);
-                    return !(func && func.kind === 148 && func.parent === symbol.valueDeclaration.parent);
+                    if (!(func && func.kind === 148))
+                        return true;
+                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
                 }
                 return true;
             }
@@ -22985,6 +23030,79 @@ var ts;
                 }
             }
         }
+        function checkClassForDuplicateDeclarations(node) {
+            var getter = 1, setter = 2, property = getter | setter;
+            var instanceNames = {};
+            var staticNames = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 148) {
+                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                        var param = _c[_b];
+                        if (ts.isParameterPropertyDeclaration(param)) {
+                            addName(instanceNames, param.name, param.name.text, property);
+                        }
+                    }
+                }
+                else {
+                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113; });
+                    var names = static ? staticNames : instanceNames;
+                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
+                    if (memberName) {
+                        switch (member.kind) {
+                            case 149:
+                                addName(names, member.name, memberName, getter);
+                                break;
+                            case 150:
+                                addName(names, member.name, memberName, setter);
+                                break;
+                            case 145:
+                                addName(names, member.name, memberName, property);
+                                break;
+                        }
+                    }
+                }
+            }
+            function addName(names, location, name, meaning) {
+                if (ts.hasProperty(names, name)) {
+                    var prev = names[name];
+                    if (prev & meaning) {
+                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                    }
+                    else {
+                        names[name] = prev | meaning;
+                    }
+                }
+                else {
+                    names[name] = meaning;
+                }
+            }
+        }
+        function checkObjectTypeForDuplicateDeclarations(node) {
+            var names = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind == 144) {
+                    var memberName = void 0;
+                    switch (member.name.kind) {
+                        case 9:
+                        case 8:
+                        case 69:
+                            memberName = member.name.text;
+                            break;
+                        default:
+                            continue;
+                    }
+                    if (ts.hasProperty(names, memberName)) {
+                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                    }
+                    else {
+                        names[memberName] = true;
+                    }
+                }
+            }
+        }
         function checkTypeForDuplicateIndexSignatures(node) {
             if (node.kind === 222) {
                 var nodeSymbol = getSymbolOfNode(node);
@@ -23203,6 +23321,7 @@ var ts;
                 var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
                 checkIndexConstraints(type);
                 checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
             }
         }
         function checkArrayType(node) {
@@ -23962,6 +24081,10 @@ var ts;
                 if (node.initializer) {
                     checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, undefined);
                 }
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                }
             }
             if (node.kind !== 145 && node.kind !== 144) {
                 checkExportsOnMergedDeclarations(node);
@@ -23974,6 +24097,18 @@ var ts;
                 checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             }
         }
+        function areDeclarationFlagsIdentical(left, right) {
+            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
+                return false;
+            }
+            var interestingFlags = 8 |
+                16 |
+                256 |
+                128 |
+                64 |
+                32;
+            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
+        }
         function checkVariableDeclaration(node) {
             checkGrammarVariableDeclaration(node);
             return checkVariableLikeDeclaration(node);
@@ -24524,6 +24659,7 @@ var ts;
             var typeWithThis = getTypeWithThisArgument(type);
             var staticType = getTypeOfSymbol(symbol);
             checkTypeParameterListsIdentical(node, symbol);
+            checkClassForDuplicateDeclarations(node);
             var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
             if (baseTypeNode) {
                 var baseTypes = getBaseTypes(type);
@@ -24735,6 +24871,7 @@ var ts;
                         checkIndexConstraints(type);
                     }
                 }
+                checkObjectTypeForDuplicateDeclarations(node);
             }
             ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
                 if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
@@ -25489,10 +25626,8 @@ var ts;
         function checkSourceFileWorker(node) {
             var links = getNodeLinks(node);
             if (!(links.flags & 1)) {
-                if (compilerOptions.skipDefaultLibCheck) {
-                    if (node.hasNoDefaultLib) {
-                        return;
-                    }
+                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
+                    return;
                 }
                 checkGrammarSourceFile(node);
                 potentialThisCollisions.length = 0;
@@ -25861,7 +25996,7 @@ var ts;
                 return symbol && getTypeOfSymbol(symbol);
             }
             if (ts.isBindingPattern(node)) {
-                return getTypeForVariableLikeDeclaration(node.parent);
+                return getTypeForVariableLikeDeclaration(node.parent, true);
             }
             if (isInRightSideOfImportOrExportAssignment(node)) {
                 var symbol = getSymbolAtLocation(node);
@@ -26300,7 +26435,7 @@ var ts;
                 if (file.moduleAugmentations.length) {
                     (augmentations || (augmentations = [])).push(file.moduleAugmentations);
                 }
-                if (file.wasReferenced && file.symbol && file.symbol.globalExports) {
+                if (file.symbol && file.symbol.globalExports) {
                     mergeSymbolTable(globals, file.symbol.globalExports);
                 }
             });
@@ -26870,7 +27005,6 @@ var ts;
                 if (prop.kind === 193 ||
                     name_20.kind === 140) {
                     checkGrammarComputedPropertyName(name_20);
-                    return "continue";
                 }
                 if (prop.kind === 254 && !inDestructuring && prop.objectAssignmentInitializer) {
                     return { value: grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment) };
@@ -26900,17 +27034,21 @@ var ts;
                 else {
                     ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
                 }
-                if (!ts.hasProperty(seen, name_20.text)) {
-                    seen[name_20.text] = currentKind;
+                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_20);
+                if (effectiveName === undefined) {
+                    return "continue";
+                }
+                if (!ts.hasProperty(seen, effectiveName)) {
+                    seen[effectiveName] = currentKind;
                 }
                 else {
-                    var existingKind = seen[name_20.text];
+                    var existingKind = seen[effectiveName];
                     if (currentKind === Property && existingKind === Property) {
-                        return "continue";
+                        grammarErrorOnNode(name_20, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_20));
                     }
                     else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
                         if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[name_20.text] = currentKind | existingKind;
+                            seen[effectiveName] = currentKind | existingKind;
                         }
                         else {
                             return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
@@ -35367,7 +35505,7 @@ var ts;
             skipTsx: true,
             traceEnabled: traceEnabled
         };
-        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : undefined);
+        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
         if (traceEnabled) {
             if (containingFile === undefined) {
                 if (rootDir === undefined) {
@@ -35870,12 +36008,25 @@ var ts;
                 }
             }
         }
+        function getDefaultTypeDirectiveNames(rootPath) {
+            var localTypes = ts.combinePaths(rootPath, "types");
+            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
+            var result = [];
+            if (ts.sys.directoryExists(localTypes)) {
+                result = result.concat(ts.sys.getDirectories(localTypes));
+            }
+            if (ts.sys.directoryExists(npmTypes)) {
+                result = result.concat(ts.sys.getDirectories(npmTypes));
+            }
+            return result;
+        }
         function getDefaultLibLocation() {
             return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
         }
         var newLine = ts.getNewLineCharacter(options);
         var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
         return {
+            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
             getSourceFile: getSourceFile,
             getDefaultLibLocation: getDefaultLibLocation,
             getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
@@ -35943,6 +36094,19 @@ var ts;
         }
         return resolutions;
     }
+    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
+        if (options.types) {
+            return options.types;
+        }
+        if (host && host.getDefaultTypeDirectiveNames) {
+            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
+            if (commonRoot) {
+                return host.getDefaultTypeDirectiveNames(commonRoot);
+            }
+        }
+        return undefined;
+    }
+    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
     function createProgram(rootNames, options, host, oldProgram) {
         var program;
         var files = [];
@@ -35978,13 +36142,14 @@ var ts;
         var filesByName = ts.createFileMap();
         var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
         if (!tryReuseStructureFromOldProgram()) {
-            if (options.types && options.types.length) {
-                var resolutions = resolveTypeReferenceDirectiveNamesWorker(options.types, undefined);
-                for (var i = 0; i < options.types.length; i++) {
-                    processTypeReferenceDirective(options.types[i], resolutions[i]);
+            ts.forEach(rootNames, function (name) { return processRootFile(name, false); });
+            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
+            if (typeReferences) {
+                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, undefined);
+                for (var i = 0; i < typeReferences.length; i++) {
+                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
                 }
             }
-            ts.forEach(rootNames, function (name) { return processRootFile(name, false); });
             if (!skipDefaultLib) {
                 if (!options.lib) {
                     processRootFile(host.getDefaultLibFileName(options), true);
@@ -36561,9 +36726,6 @@ var ts;
                 if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
                     reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
                 }
-                if (file_1) {
-                    file_1.wasReferenced = file_1.wasReferenced || isReference;
-                }
                 return file_1;
             }
             var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
@@ -36576,7 +36738,6 @@ var ts;
             });
             filesByName.set(path, file);
             if (file) {
-                file.wasReferenced = file.wasReferenced || isReference;
                 file.path = path;
                 if (host.useCaseSensitiveFileNames()) {
                     var existingFile = filesByNameIgnoreCase.get(path);
@@ -36677,17 +36838,7 @@ var ts;
                         !options.noResolve &&
                         i < file.imports.length;
                     if (shouldAddFile) {
-                        var importedFile = findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), false, false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
-                        if (importedFile && resolution.isExternalLibraryImport) {
-                            if (!ts.isExternalModule(importedFile) && importedFile.statements.length) {
-                                var start_5 = ts.getTokenPosOfNode(file.imports[i], file);
-                                fileProcessingDiagnostics.add(ts.createFileDiagnostic(file, start_5, file.imports[i].end - start_5, ts.Diagnostics.Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition, importedFile.fileName));
-                            }
-                            else if (importedFile.referencedFiles.length) {
-                                var firstRef = importedFile.referencedFiles[0];
-                                fileProcessingDiagnostics.add(ts.createFileDiagnostic(importedFile, firstRef.pos, firstRef.end - firstRef.pos, ts.Diagnostics.Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition));
-                            }
-                        }
+                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), false, false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
                     }
                 }
             }
@@ -36772,7 +36923,7 @@ var ts;
                         }
                     }
                     else {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substututions_for_pattern_0_should_be_an_array, key));
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
                     }
                 }
             }
@@ -36821,13 +36972,19 @@ var ts;
             }
             else if (firstExternalModuleSourceFile && languageVersion < 2 && options.module === ts.ModuleKind.None) {
                 var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting_the_module_compiler_option_in_a_tsconfig_json_file));
+                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
             }
             if (options.module === ts.ModuleKind.ES6 && languageVersion < 2) {
                 programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
             }
-            if (outFile && options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+            if (outFile) {
+                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+                }
+                else if (options.module === undefined && firstExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
+                }
             }
             if (options.outDir ||
                 options.sourceRoot ||
@@ -37517,7 +37674,7 @@ var ts;
 (function (ts) {
     var NavigateTo;
     (function (NavigateTo) {
-        function getNavigateToItems(program, cancellationToken, searchValue, maxResultCount) {
+        function getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount) {
             var patternMatcher = ts.createPatternMatcher(searchValue);
             var rawItems = [];
             var baseSensitivity = { sensitivity: "base" };
@@ -37550,6 +37707,17 @@ var ts;
                     }
                 }
             });
+            rawItems = ts.filter(rawItems, function (item) {
+                var decl = item.declaration;
+                if (decl.kind === 231 || decl.kind === 234 || decl.kind === 229) {
+                    var importer = checker.getSymbolAtLocation(decl.name);
+                    var imported = checker.getAliasedSymbol(importer);
+                    return importer.name !== imported.name;
+                }
+                else {
+                    return true;
+                }
+            });
             rawItems.sort(compareNavigateToItems);
             if (maxResultCount !== undefined) {
                 rawItems = rawItems.slice(0, maxResultCount);
@@ -37892,8 +38060,12 @@ var ts;
                         return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberSetAccessorElement);
                     case 153:
                         return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
+                    case 224:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.enumElement);
                     case 255:
                         return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 222:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.interfaceElement);
                     case 151:
                         return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
                     case 152:
@@ -39263,7 +39435,7 @@ var ts;
             }
         }
         function findRightmostChildNodeWithTokens(children, exclusiveStartPosition) {
-            for (var i = exclusiveStartPosition - 1; i >= 0; --i) {
+            for (var i = exclusiveStartPosition - 1; i >= 0; i--) {
                 if (nodeHasTokens(children[i])) {
                     return children[i];
                 }
@@ -39889,18 +40061,17 @@ var ts;
                 if (!isStarted) {
                     scanner.scan();
                 }
-                var t;
                 var pos = scanner.getStartPos();
                 while (pos < endPos) {
-                    var t_1 = scanner.getToken();
-                    if (!ts.isTrivia(t_1)) {
+                    var t = scanner.getToken();
+                    if (!ts.isTrivia(t)) {
                         break;
                     }
                     scanner.scan();
                     var item = {
                         pos: pos,
                         end: scanner.getStartPos(),
-                        kind: t_1
+                        kind: t
                     };
                     pos = scanner.getStartPos();
                     if (!leadingTrivia) {
@@ -41550,7 +41721,7 @@ var ts;
                 else {
                     parts = [];
                     var startPos = commentRange.pos;
-                    for (var line = startLine; line < endLine; ++line) {
+                    for (var line = startLine; line < endLine; line++) {
                         var endOfLine = ts.getEndLinePosition(line, sourceFile);
                         parts.push({ pos: startPos, end: endOfLine });
                         startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
@@ -41568,7 +41739,7 @@ var ts;
                     startLine++;
                 }
                 var delta = indentation - nonWhitespaceColumnInFirstPart.column;
-                for (var i = startIndex, len = parts.length; i < len; ++i, ++startLine) {
+                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
                     var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
                     var nonWhitespaceCharacterAndColumn = i === 0
                         ? nonWhitespaceColumnInFirstPart
@@ -41584,7 +41755,7 @@ var ts;
                 }
             }
             function trimTrailingWhitespacesForLines(line1, line2, range) {
-                for (var line = line1; line < line2; ++line) {
+                for (var line = line1; line < line2; line++) {
                     var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
                     var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
                     if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
@@ -41627,7 +41798,6 @@ var ts;
                 }
             }
             function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
-                var between;
                 switch (rule.Operation.Action) {
                     case 1:
                         return;
@@ -41657,14 +41827,6 @@ var ts;
                 }
             }
         }
-        function isSomeBlock(kind) {
-            switch (kind) {
-                case 199:
-                case 226:
-                    return true;
-            }
-            return false;
-        }
         function getOpenTokenForList(node, list) {
             switch (node.kind) {
                 case 148:
@@ -41722,7 +41884,7 @@ var ts;
                     internedTabsIndentation = [];
                 }
                 if (internedTabsIndentation[tabs] === undefined) {
-                    internedTabsIndentation[tabs] = tabString = repeat('\t', tabs);
+                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
                 }
                 else {
                     tabString = internedTabsIndentation[tabs];
@@ -41747,7 +41909,7 @@ var ts;
             }
             function repeat(value, count) {
                 var s = "";
-                for (var i = 0; i < count; ++i) {
+                for (var i = 0; i < count; i++) {
                     s += value;
                 }
                 return s;
@@ -42015,7 +42177,7 @@ var ts;
                 ts.Debug.assert(index >= 0 && index < list.length);
                 var node = list[index];
                 var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
-                for (var i = index - 1; i >= 0; --i) {
+                for (var i = index - 1; i >= 0; i--) {
                     if (list[i].kind === 24) {
                         continue;
                     }
@@ -42034,7 +42196,7 @@ var ts;
             function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
                 var character = 0;
                 var column = 0;
-                for (var pos = startPos; pos < endPos; ++pos) {
+                for (var pos = startPos; pos < endPos; pos++) {
                     var ch = sourceFile.text.charCodeAt(pos);
                     if (!ts.isWhiteSpace(ch)) {
                         break;
@@ -44005,9 +44167,9 @@ var ts;
             log("getCompletionData: Get previous token 1: " + (new Date().getTime() - start));
             var contextToken = previousToken;
             if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
-                var start_6 = new Date().getTime();
+                var start_5 = new Date().getTime();
                 contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
-                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_6));
+                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_5));
             }
             var node = currentToken;
             var isRightOfDot = false;
@@ -44234,9 +44396,9 @@ var ts;
                     || contextToken.kind === 166
                     || contextToken.kind === 10
                     || ts.isTemplateLiteralKind(contextToken.kind)) {
-                    var start_7 = contextToken.getStart();
+                    var start_6 = contextToken.getStart();
                     var end = contextToken.getEnd();
-                    if (start_7 < position && position < end) {
+                    if (start_6 < position && position < end) {
                         return true;
                     }
                     if (position === end) {
@@ -45314,8 +45476,7 @@ var ts;
         }
         function getDocumentHighlights(fileName, position, filesToSearch) {
             synchronizeHostData();
-            filesToSearch = ts.map(filesToSearch, ts.normalizeSlashes);
-            var sourceFilesToSearch = ts.filter(program.getSourceFiles(), function (f) { return ts.contains(filesToSearch, f.fileName); });
+            var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
             var sourceFile = getValidSourceFile(fileName);
             var node = ts.getTouchingWord(sourceFile, position);
             if (!node) {
@@ -46498,7 +46659,8 @@ var ts;
         }
         function getNavigateToItems(searchValue, maxResultCount) {
             synchronizeHostData();
-            return ts.NavigateTo.getNavigateToItems(program, cancellationToken, searchValue, maxResultCount);
+            var checker = getProgram().getTypeChecker();
+            return ts.NavigateTo.getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount);
         }
         function getEmitOutput(fileName) {
             synchronizeHostData();
@@ -50961,6 +51123,9 @@ var ts;
         LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
             return this.shimHost.getCurrentDirectory();
         };
+        LanguageServiceShimHostAdapter.prototype.getDirectories = function (path) {
+            return this.shimHost.getDirectories(path);
+        };
         LanguageServiceShimHostAdapter.prototype.getDefaultLibFileName = function (options) {
             return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
         };
diff --git a/lib/typescript.d.ts b/lib/typescript.d.ts
index 84a06001d14..1ac624055d7 100644
--- a/lib/typescript.d.ts
+++ b/lib/typescript.d.ts
@@ -261,7 +261,7 @@ declare namespace ts {
         ModuleDeclaration = 225,
         ModuleBlock = 226,
         CaseBlock = 227,
-        GlobalModuleExportDeclaration = 228,
+        NamespaceExportDeclaration = 228,
         ImportEqualsDeclaration = 229,
         ImportDeclaration = 230,
         ImportClause = 231,
@@ -934,7 +934,7 @@ declare namespace ts {
     interface NamespaceImport extends Declaration {
         name: Identifier;
     }
-    interface GlobalModuleExportDeclaration extends DeclarationStatement {
+    interface NamespaceExportDeclaration extends DeclarationStatement {
         name: Identifier;
         moduleReference: LiteralLikeNode;
     }
@@ -1329,7 +1329,7 @@ declare namespace ts {
         FunctionScopedVariableExcludes = 107454,
         BlockScopedVariableExcludes = 107455,
         ParameterExcludes = 107455,
-        PropertyExcludes = 107455,
+        PropertyExcludes = 0,
         EnumMemberExcludes = 107455,
         FunctionExcludes = 106927,
         ClassExcludes = 899519,
@@ -1554,6 +1554,7 @@ declare namespace ts {
         allowJs?: boolean;
         noImplicitUseStrict?: boolean;
         strictNullChecks?: boolean;
+        skipLibCheck?: boolean;
         listEmittedFiles?: boolean;
         lib?: string[];
         types?: string[];
@@ -1627,6 +1628,7 @@ declare namespace ts {
         trace?(s: string): void;
         directoryExists?(directoryName: string): boolean;
         realpath?(path: string): string;
+        getCurrentDirectory?(): string;
     }
     interface ResolvedModule {
         resolvedFileName: string;
@@ -1650,6 +1652,7 @@ declare namespace ts {
         getCancellationToken?(): CancellationToken;
         getDefaultLibFileName(options: CompilerOptions): string;
         getDefaultLibLocation?(): string;
+        getDefaultTypeDirectiveNames?(rootPath: string): string[];
         writeFile: WriteFileCallback;
         getCurrentDirectory(): string;
         getCanonicalFileName(fileName: string): string;
@@ -1693,6 +1696,7 @@ declare namespace ts {
         createDirectory(path: string): void;
         getExecutingFilePath(): string;
         getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
         readDirectory(path: string, extension?: string, exclude?: string[]): string[];
         getModifiedTime?(path: string): Date;
         createHash?(data: string): string;
@@ -1812,6 +1816,7 @@ declare namespace ts {
     function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
     function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
     function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
+    function getDefaultTypeDirectiveNames(options: CompilerOptions, rootFiles: string[], host: CompilerHost): string[];
     function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program;
 }
 declare namespace ts {
@@ -2345,26 +2350,55 @@ declare namespace ts {
     namespace ScriptElementKind {
         const unknown: string;
         const warning: string;
+        /** predefined type (void) or keyword (class) */
         const keyword: string;
+        /** top level script node */
         const scriptElement: string;
+        /** module foo {} */
         const moduleElement: string;
+        /** class X {} */
         const classElement: string;
+        /** var x = class X {} */
         const localClassElement: string;
+        /** interface Y {} */
         const interfaceElement: string;
+        /** type T = ... */
         const typeElement: string;
+        /** enum E */
         const enumElement: string;
+        /**
+         * Inside module and script only
+         * const v = ..
+         */
         const variableElement: string;
+        /** Inside function */
         const localVariableElement: string;
+        /**
+         * Inside module and script only
+         * function f() { }
+         */
         const functionElement: string;
+        /** Inside function */
         const localFunctionElement: string;
+        /** class X { [public|private]* foo() {} } */
         const memberFunctionElement: string;
+        /** class X { [public|private]* [get|set] foo:number; } */
         const memberGetAccessorElement: string;
         const memberSetAccessorElement: string;
+        /**
+         * class X { [public|private]* foo:number; }
+         * interface Y { foo:number; }
+         */
         const memberVariableElement: string;
+        /** class X { constructor() { } } */
         const constructorImplementationElement: string;
+        /** interface Y { ():number; } */
         const callSignatureElement: string;
+        /** interface Y { []:number; } */
         const indexSignatureElement: string;
+        /** interface Y { new():Y; } */
         const constructSignatureElement: string;
+        /** function foo(*Y*: string) */
         const parameterElement: string;
         const typeParameterElement: string;
         const primitiveType: string;
diff --git a/lib/typescript.js b/lib/typescript.js
index e78eda7b0bb..19fffd35501 100644
--- a/lib/typescript.js
+++ b/lib/typescript.js
@@ -271,7 +271,7 @@ var ts;
         SyntaxKind[SyntaxKind["ModuleDeclaration"] = 225] = "ModuleDeclaration";
         SyntaxKind[SyntaxKind["ModuleBlock"] = 226] = "ModuleBlock";
         SyntaxKind[SyntaxKind["CaseBlock"] = 227] = "CaseBlock";
-        SyntaxKind[SyntaxKind["GlobalModuleExportDeclaration"] = 228] = "GlobalModuleExportDeclaration";
+        SyntaxKind[SyntaxKind["NamespaceExportDeclaration"] = 228] = "NamespaceExportDeclaration";
         SyntaxKind[SyntaxKind["ImportEqualsDeclaration"] = 229] = "ImportEqualsDeclaration";
         SyntaxKind[SyntaxKind["ImportDeclaration"] = 230] = "ImportDeclaration";
         SyntaxKind[SyntaxKind["ImportClause"] = 231] = "ImportClause";
@@ -561,7 +561,7 @@ var ts;
         // they can not merge with anything in the value space
         SymbolFlags[SymbolFlags["BlockScopedVariableExcludes"] = 107455] = "BlockScopedVariableExcludes";
         SymbolFlags[SymbolFlags["ParameterExcludes"] = 107455] = "ParameterExcludes";
-        SymbolFlags[SymbolFlags["PropertyExcludes"] = 107455] = "PropertyExcludes";
+        SymbolFlags[SymbolFlags["PropertyExcludes"] = 0] = "PropertyExcludes";
         SymbolFlags[SymbolFlags["EnumMemberExcludes"] = 107455] = "EnumMemberExcludes";
         SymbolFlags[SymbolFlags["FunctionExcludes"] = 106927] = "FunctionExcludes";
         SymbolFlags[SymbolFlags["ClassExcludes"] = 899519] = "ClassExcludes";
@@ -1841,6 +1841,10 @@ var ts;
                 }
                 return result.sort();
             }
+            function getDirectories(path) {
+                var folder = fso.GetFolder(path);
+                return getNames(folder.subfolders);
+            }
             function readDirectory(path, extension, exclude) {
                 var result = [];
                 exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
@@ -1895,6 +1899,7 @@ var ts;
                 getCurrentDirectory: function () {
                     return new ActiveXObject("WScript.Shell").CurrentDirectory;
                 },
+                getDirectories: getDirectories,
                 readDirectory: readDirectory,
                 exit: function (exitCode) {
                     try {
@@ -2057,6 +2062,9 @@ var ts;
             function directoryExists(path) {
                 return fileSystemEntryExists(path, 1 /* Directory */);
             }
+            function getDirectories(path) {
+                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1 /* Directory */); });
+            }
             function readDirectory(path, extension, exclude) {
                 var result = [];
                 exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
@@ -2157,6 +2165,7 @@ var ts;
                 getCurrentDirectory: function () {
                     return process.cwd();
                 },
+                getDirectories: getDirectories,
                 readDirectory: readDirectory,
                 getModifiedTime: function (path) {
                     try {
@@ -2209,6 +2218,7 @@ var ts;
                 createDirectory: ChakraHost.createDirectory,
                 getExecutingFilePath: function () { return ChakraHost.executingFile; },
                 getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
+                getDirectories: ChakraHost.getDirectories,
                 readDirectory: ChakraHost.readDirectory,
                 exit: ChakraHost.quit,
                 realpath: realpath
@@ -2347,7 +2357,7 @@ var ts;
         or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
         Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
         Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
-        Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting_the_module_compiler_option_in_a_tsconfig_json_file: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting__1148", message: "Cannot compile modules unless the '--module' flag is provided with a valid module type. Consider setting the 'module' compiler option in a 'tsconfig.json' file." },
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
         File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
         new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
         const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
@@ -2717,6 +2727,8 @@ var ts;
         this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
         The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
         The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
+        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
+        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
         Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
         Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
         Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
@@ -2810,7 +2822,7 @@ var ts;
         Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
         Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
         Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
-        Substututions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substututions_for_pattern_0_should_be_an_array_5063", message: "Substututions for pattern '{0}' should be an array." },
+        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
         Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
         Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
         Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
@@ -2823,6 +2835,7 @@ var ts;
         Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
         Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
         Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
+        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
         Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
         Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
         Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
@@ -2924,6 +2937,7 @@ var ts;
         Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
         The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
         Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
         Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
         Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
         Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
@@ -6172,7 +6186,7 @@ var ts;
     // export default ...
     function isAliasSymbolDeclaration(node) {
         return node.kind === 229 /* ImportEqualsDeclaration */ ||
-            node.kind === 228 /* GlobalModuleExportDeclaration */ ||
+            node.kind === 228 /* NamespaceExportDeclaration */ ||
             node.kind === 231 /* ImportClause */ && !!node.name ||
             node.kind === 232 /* NamespaceImport */ ||
             node.kind === 234 /* ImportSpecifier */ ||
@@ -6301,7 +6315,7 @@ var ts;
     }
     ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
     function getPropertyNameForPropertyNameNode(name) {
-        if (name.kind === 69 /* Identifier */ || name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */) {
+        if (name.kind === 69 /* Identifier */ || name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */ || name.kind === 142 /* Parameter */) {
             return name.text;
         }
         if (name.kind === 140 /* ComputedPropertyName */) {
@@ -7773,7 +7787,7 @@ var ts;
             case 231 /* ImportClause */:
                 return visitNode(cbNode, node.name) ||
                     visitNode(cbNode, node.namedBindings);
-            case 228 /* GlobalModuleExportDeclaration */:
+            case 228 /* NamespaceExportDeclaration */:
                 return visitNode(cbNode, node.name);
             case 232 /* NamespaceImport */:
                 return visitNode(cbNode, node.name);
@@ -12182,7 +12196,7 @@ var ts;
             return nextToken() === 39 /* SlashToken */;
         }
         function parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers) {
-            var exportDeclaration = createNode(228 /* GlobalModuleExportDeclaration */, fullStart);
+            var exportDeclaration = createNode(228 /* NamespaceExportDeclaration */, fullStart);
             exportDeclaration.decorators = decorators;
             exportDeclaration.modifiers = modifiers;
             parseExpected(116 /* AsKeyword */);
@@ -15018,10 +15032,10 @@ var ts;
                 case 145 /* PropertyDeclaration */:
                 case 144 /* PropertySignature */:
                 case 266 /* JSDocRecordMember */:
-                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 107455 /* PropertyExcludes */);
+                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
                 case 253 /* PropertyAssignment */:
                 case 254 /* ShorthandPropertyAssignment */:
-                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 107455 /* PropertyExcludes */);
+                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* PropertyExcludes */);
                 case 255 /* EnumMember */:
                     return bindPropertyOrMethodOrAccessor(node, 8 /* EnumMember */, 107455 /* EnumMemberExcludes */);
                 case 247 /* JsxSpreadAttribute */:
@@ -15037,7 +15051,7 @@ var ts;
                     // as other properties in the object literal.  So we use SymbolFlags.PropertyExcludes
                     // so that it will conflict with any other object literal members with the same
                     // name.
-                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 107455 /* PropertyExcludes */ : 99263 /* MethodExcludes */);
+                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 0 /* PropertyExcludes */ : 99263 /* MethodExcludes */);
                 case 220 /* FunctionDeclaration */:
                     return bindFunctionDeclaration(node);
                 case 148 /* Constructor */:
@@ -15081,8 +15095,8 @@ var ts;
                 case 234 /* ImportSpecifier */:
                 case 238 /* ExportSpecifier */:
                     return declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
-                case 228 /* GlobalModuleExportDeclaration */:
-                    return bindGlobalModuleExportDeclaration(node);
+                case 228 /* NamespaceExportDeclaration */:
+                    return bindNamespaceExportDeclaration(node);
                 case 231 /* ImportClause */:
                     return bindImportClause(node);
                 case 236 /* ExportDeclaration */:
@@ -15120,14 +15134,14 @@ var ts;
             }
             else if (boundExpression.kind === 69 /* Identifier */ && node.kind === 235 /* ExportAssignment */) {
                 // An export default clause with an identifier exports all meanings of that identifier
-                declareSymbol(container.symbol.exports, container.symbol, node, 8388608 /* Alias */, 107455 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
+                declareSymbol(container.symbol.exports, container.symbol, node, 8388608 /* Alias */, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
             }
             else {
                 // An export default clause with an expression exports a value
-                declareSymbol(container.symbol.exports, container.symbol, node, 4 /* Property */, 107455 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
+                declareSymbol(container.symbol.exports, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
             }
         }
-        function bindGlobalModuleExportDeclaration(node) {
+        function bindNamespaceExportDeclaration(node) {
             if (node.modifiers && node.modifiers.length) {
                 file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
             }
@@ -15186,7 +15200,7 @@ var ts;
             if (container.kind === 179 /* FunctionExpression */ || container.kind === 220 /* FunctionDeclaration */) {
                 container.symbol.members = container.symbol.members || {};
                 // It's acceptable for multiple 'this' assignments of the same identifier to occur
-                declareSymbol(container.symbol.members, container.symbol, node, 4 /* Property */, 107455 /* PropertyExcludes */ & ~4 /* Property */);
+                declareSymbol(container.symbol.members, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ & ~4 /* Property */);
             }
         }
         function bindPrototypePropertyAssignment(node) {
@@ -15209,7 +15223,7 @@ var ts;
                 funcSymbol.members = {};
             }
             // Declare the method/property
-            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4 /* Property */, 107455 /* PropertyExcludes */);
+            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4 /* Property */, 0 /* PropertyExcludes */);
         }
         function bindCallExpression(node) {
             // We're only inspecting call expressions to detect CommonJS modules, so we can skip
@@ -15310,7 +15324,7 @@ var ts;
             // containing class.
             if (ts.isParameterPropertyDeclaration(node)) {
                 var classDeclaration = node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */, 107455 /* PropertyExcludes */);
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */);
             }
         }
         function bindFunctionDeclaration(node) {
@@ -15696,7 +15710,7 @@ var ts;
             if (flags & 1 /* FunctionScopedVariable */)
                 result |= 107454 /* FunctionScopedVariableExcludes */;
             if (flags & 4 /* Property */)
-                result |= 107455 /* PropertyExcludes */;
+                result |= 0 /* PropertyExcludes */;
             if (flags & 8 /* EnumMember */)
                 result |= 107455 /* EnumMemberExcludes */;
             if (flags & 16 /* Function */)
@@ -15982,6 +15996,7 @@ var ts;
             var propertyWithInvalidInitializer;
             var errorLocation = location;
             var grandparent;
+            var isInExternalModule = false;
             loop: while (location) {
                 // Locals of a source file are not in scope (because they get merged into the global symbol table)
                 if (location.locals && !isGlobalSourceFile(location)) {
@@ -16024,6 +16039,7 @@ var ts;
                     case 256 /* SourceFile */:
                         if (!ts.isExternalOrCommonJsModule(location))
                             break;
+                        isInExternalModule = true;
                     case 225 /* ModuleDeclaration */:
                         var moduleExports = getSymbolOfNode(location).exports;
                         if (location.kind === 256 /* SourceFile */ || ts.isAmbientModule(location)) {
@@ -16207,6 +16223,13 @@ var ts;
                         checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
                     }
                 }
+                // If we're in an external module, we can't reference symbols created from UMD export declarations
+                if (result && isInExternalModule) {
+                    var decls = result.declarations;
+                    if (decls && decls.length === 1 && decls[0].kind === 228 /* NamespaceExportDeclaration */) {
+                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
+                    }
+                }
             }
             return result;
         }
@@ -16409,7 +16432,7 @@ var ts;
                     return getTargetOfExportSpecifier(node);
                 case 235 /* ExportAssignment */:
                     return getTargetOfExportAssignment(node);
-                case 228 /* GlobalModuleExportDeclaration */:
+                case 228 /* NamespaceExportDeclaration */:
                     return getTargetOfGlobalModuleExportDeclaration(node);
             }
         }
@@ -17883,7 +17906,7 @@ var ts;
         // assigned by contextual typing.
         function getTypeForBindingElementParent(node) {
             var symbol = getSymbolOfNode(node);
-            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false);
         }
         function getTextOfPropertyName(name) {
             switch (name.kind) {
@@ -18009,7 +18032,7 @@ var ts;
             return strictNullChecks && optional ? addNullableKind(type, 32 /* Undefined */) : type;
         }
         // Return the inferred type for a variable, parameter, or property declaration
-        function getTypeForVariableLikeDeclaration(declaration) {
+        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
             if (declaration.flags & 134217728 /* JavaScriptFile */) {
                 // If this is a variable in a JavaScript file, then use the JSDoc type (if it has
                 // one as its type), otherwise fallback to the below standard TS codepaths to
@@ -18035,7 +18058,7 @@ var ts;
             }
             // Use type from type annotation if one is present
             if (declaration.type) {
-                return addOptionality(getTypeFromTypeNode(declaration.type), /*optional*/ !!declaration.questionToken);
+                return addOptionality(getTypeFromTypeNode(declaration.type), /*optional*/ declaration.questionToken && includeOptionality);
             }
             if (declaration.kind === 142 /* Parameter */) {
                 var func = declaration.parent;
@@ -18056,12 +18079,12 @@ var ts;
                     ? getContextuallyTypedThisType(func)
                     : getContextuallyTypedParameterType(declaration);
                 if (type) {
-                    return addOptionality(type, /*optional*/ !!declaration.questionToken);
+                    return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
                 }
             }
             // Use the type of the initializer expression if one is present
             if (declaration.initializer) {
-                return addOptionality(checkExpressionCached(declaration.initializer), /*optional*/ !!declaration.questionToken);
+                return addOptionality(checkExpressionCached(declaration.initializer), /*optional*/ declaration.questionToken && includeOptionality);
             }
             // If it is a short-hand property assignment, use the type of the identifier
             if (declaration.kind === 254 /* ShorthandPropertyAssignment */) {
@@ -18155,7 +18178,7 @@ var ts;
         // binding pattern [x, s = ""]. Because the contextual type is a tuple type, the resulting type of [1, "one"] is the
         // tuple type [number, string]. Thus, the type inferred for 'x' is number and the type inferred for 's' is string.
         function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
-            var type = getTypeForVariableLikeDeclaration(declaration);
+            var type = getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
             if (type) {
                 if (reportErrors) {
                     reportErrorsFromWidening(declaration, type);
@@ -20719,7 +20742,7 @@ var ts;
                     return isIdenticalTo(source, target);
                 }
                 if (!(target.flags & 134217728 /* Never */)) {
-                    if (target.flags & 1 /* Any */)
+                    if (target.flags & 1 /* Any */ || source.flags & 134217728 /* Never */)
                         return -1 /* True */;
                     if (source.flags & 32 /* Undefined */) {
                         if (!strictNullChecks || target.flags & (32 /* Undefined */ | 16 /* Void */) || source === emptyArrayElementType)
@@ -20739,7 +20762,7 @@ var ts;
                     if (source.flags & 256 /* StringLiteral */ && target === stringType)
                         return -1 /* True */;
                     if (relation === assignableRelation || relation === comparableRelation) {
-                        if (source.flags & (1 /* Any */ | 134217728 /* Never */))
+                        if (source.flags & 1 /* Any */)
                             return -1 /* True */;
                         if (source === numberType && target.flags & 128 /* Enum */)
                             return -1 /* True */;
@@ -21634,41 +21657,52 @@ var ts;
                 getSignaturesOfType(type, 0 /* Call */).length === 0 &&
                 getSignaturesOfType(type, 1 /* Construct */).length === 0;
         }
+        function createTransientSymbol(source, type) {
+            var symbol = createSymbol(source.flags | 67108864 /* Transient */, source.name);
+            symbol.declarations = source.declarations;
+            symbol.parent = source.parent;
+            symbol.type = type;
+            symbol.target = source;
+            if (source.valueDeclaration) {
+                symbol.valueDeclaration = source.valueDeclaration;
+            }
+            return symbol;
+        }
+        function transformTypeOfMembers(type, f) {
+            var members = {};
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var property = _a[_i];
+                var original = getTypeOfSymbol(property);
+                var updated = f(original);
+                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
+            }
+            ;
+            return members;
+        }
+        /**
+         * If the the provided object literal is subject to the excess properties check,
+         * create a new that is exempt. Recursively mark object literal members as exempt.
+         * Leave signatures alone since they are not subject to the check.
+         */
         function getRegularTypeOfObjectLiteral(type) {
-            if (type.flags & 1048576 /* FreshObjectLiteral */) {
-                var regularType = type.regularType;
-                if (!regularType) {
-                    regularType = createType(type.flags & ~1048576 /* FreshObjectLiteral */);
-                    regularType.symbol = type.symbol;
-                    regularType.members = type.members;
-                    regularType.properties = type.properties;
-                    regularType.callSignatures = type.callSignatures;
-                    regularType.constructSignatures = type.constructSignatures;
-                    regularType.stringIndexInfo = type.stringIndexInfo;
-                    regularType.numberIndexInfo = type.numberIndexInfo;
-                    type.regularType = regularType;
-                }
+            if (!(type.flags & 1048576 /* FreshObjectLiteral */)) {
+                return type;
+            }
+            var regularType = type.regularType;
+            if (regularType) {
                 return regularType;
             }
-            return type;
+            var resolved = type;
+            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
+            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
+            regularNew.flags = resolved.flags & ~1048576 /* FreshObjectLiteral */;
+            type.regularType = regularNew;
+            return regularNew;
         }
         function getWidenedTypeOfObjectLiteral(type) {
-            var properties = getPropertiesOfObjectType(type);
-            var members = {};
-            ts.forEach(properties, function (p) {
-                var propType = getTypeOfSymbol(p);
-                var widenedType = getWidenedType(propType);
-                if (propType !== widenedType) {
-                    var symbol = createSymbol(p.flags | 67108864 /* Transient */, p.name);
-                    symbol.declarations = p.declarations;
-                    symbol.parent = p.parent;
-                    symbol.type = widenedType;
-                    symbol.target = p;
-                    if (p.valueDeclaration)
-                        symbol.valueDeclaration = p.valueDeclaration;
-                    p = symbol;
-                }
-                members[p.name] = p;
+            var members = transformTypeOfMembers(type, function (prop) {
+                var widened = getWidenedType(prop);
+                return prop === widened ? prop : widened;
             });
             var stringIndexInfo = getIndexInfoOfType(type, 0 /* String */);
             var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
@@ -23224,7 +23258,7 @@ var ts;
             }
             return nodeCheckFlag === 512 /* SuperStatic */
                 ? getBaseConstructorTypeOfClass(classType)
-                : baseClassType;
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
             function isLegalUsageOfSuperExpression(container) {
                 if (!container) {
                     return false;
@@ -25936,7 +25970,7 @@ var ts;
                 var types = void 0;
                 var funcIsGenerator = !!func.asteriskToken;
                 if (funcIsGenerator) {
-                    types = checkAndAggregateYieldOperandTypes(func.body, contextualMapper);
+                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
                     if (types.length === 0) {
                         var iterableIteratorAny = createIterableIteratorType(anyType);
                         if (compilerOptions.noImplicitAny) {
@@ -25946,8 +25980,7 @@ var ts;
                     }
                 }
                 else {
-                    var hasImplicitReturn = !!(func.flags & 32768 /* HasImplicitReturn */);
-                    types = checkAndAggregateReturnExpressionTypes(func.body, contextualMapper, isAsync, hasImplicitReturn);
+                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
                     if (!types) {
                         return neverType;
                     }
@@ -26001,9 +26034,9 @@ var ts;
                 return widenedType;
             }
         }
-        function checkAndAggregateYieldOperandTypes(body, contextualMapper) {
+        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
             var aggregatedTypes = [];
-            ts.forEachYieldExpression(body, function (yieldExpression) {
+            ts.forEachYieldExpression(func.body, function (yieldExpression) {
                 var expr = yieldExpression.expression;
                 if (expr) {
                     var type = checkExpressionCached(expr, contextualMapper);
@@ -26018,10 +26051,12 @@ var ts;
             });
             return aggregatedTypes;
         }
-        function checkAndAggregateReturnExpressionTypes(body, contextualMapper, isAsync, hasImplicitReturn) {
+        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
+            var isAsync = ts.isAsyncFunctionLike(func);
             var aggregatedTypes = [];
-            var hasOmittedExpressions = false;
-            ts.forEachReturnStatement(body, function (returnStatement) {
+            var hasReturnWithNoExpression = !!(func.flags & 32768 /* HasImplicitReturn */);
+            var hasReturnOfTypeNever = false;
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
                 var expr = returnStatement.expression;
                 if (expr) {
                     var type = checkExpressionCached(expr, contextualMapper);
@@ -26030,20 +26065,24 @@ var ts;
                         // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
                         // return type of the body should be unwrapped to its awaited type, which should be wrapped in
                         // the native Promise<T> type by the caller.
-                        type = checkAwaitedType(type, body.parent, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
                     }
-                    if (type !== neverType && !ts.contains(aggregatedTypes, type)) {
+                    if (type === neverType) {
+                        hasReturnOfTypeNever = true;
+                    }
+                    else if (!ts.contains(aggregatedTypes, type)) {
                         aggregatedTypes.push(type);
                     }
                 }
                 else {
-                    hasOmittedExpressions = true;
+                    hasReturnWithNoExpression = true;
                 }
             });
-            if (aggregatedTypes.length === 0 && !hasOmittedExpressions && !hasImplicitReturn) {
+            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
+                func.kind === 179 /* FunctionExpression */ || func.kind === 180 /* ArrowFunction */)) {
                 return undefined;
             }
-            if (strictNullChecks && aggregatedTypes.length && (hasOmittedExpressions || hasImplicitReturn)) {
+            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
                 if (!ts.contains(aggregatedTypes, undefinedType)) {
                     aggregatedTypes.push(undefinedType);
                 }
@@ -26215,8 +26254,14 @@ var ts;
                 if (symbol.flags & 4 /* Property */ &&
                     (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) &&
                     expr.expression.kind === 97 /* ThisKeyword */) {
+                    // Look for if this is the constructor for the class that `symbol` is a property of.
                     var func = ts.getContainingFunction(expr);
-                    return !(func && func.kind === 148 /* Constructor */ && func.parent === symbol.valueDeclaration.parent);
+                    if (!(func && func.kind === 148 /* Constructor */))
+                        return true;
+                    // If func.parent is a class and symbol is a (readonly) property of that class, or
+                    // if func is a constructor and symbol is a (readonly) parameter property declared in it,
+                    // then symbol is writeable here.
+                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
                 }
                 return true;
             }
@@ -27148,6 +27193,79 @@ var ts;
                 }
             }
         }
+        function checkClassForDuplicateDeclarations(node) {
+            var getter = 1, setter = 2, property = getter | setter;
+            var instanceNames = {};
+            var staticNames = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 148 /* Constructor */) {
+                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                        var param = _c[_b];
+                        if (ts.isParameterPropertyDeclaration(param)) {
+                            addName(instanceNames, param.name, param.name.text, property);
+                        }
+                    }
+                }
+                else {
+                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113 /* StaticKeyword */; });
+                    var names = static ? staticNames : instanceNames;
+                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
+                    if (memberName) {
+                        switch (member.kind) {
+                            case 149 /* GetAccessor */:
+                                addName(names, member.name, memberName, getter);
+                                break;
+                            case 150 /* SetAccessor */:
+                                addName(names, member.name, memberName, setter);
+                                break;
+                            case 145 /* PropertyDeclaration */:
+                                addName(names, member.name, memberName, property);
+                                break;
+                        }
+                    }
+                }
+            }
+            function addName(names, location, name, meaning) {
+                if (ts.hasProperty(names, name)) {
+                    var prev = names[name];
+                    if (prev & meaning) {
+                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                    }
+                    else {
+                        names[name] = prev | meaning;
+                    }
+                }
+                else {
+                    names[name] = meaning;
+                }
+            }
+        }
+        function checkObjectTypeForDuplicateDeclarations(node) {
+            var names = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind == 144 /* PropertySignature */) {
+                    var memberName = void 0;
+                    switch (member.name.kind) {
+                        case 9 /* StringLiteral */:
+                        case 8 /* NumericLiteral */:
+                        case 69 /* Identifier */:
+                            memberName = member.name.text;
+                            break;
+                        default:
+                            continue;
+                    }
+                    if (ts.hasProperty(names, memberName)) {
+                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                    }
+                    else {
+                        names[memberName] = true;
+                    }
+                }
+            }
+        }
         function checkTypeForDuplicateIndexSignatures(node) {
             if (node.kind === 222 /* InterfaceDeclaration */) {
                 var nodeSymbol = getSymbolOfNode(node);
@@ -27399,6 +27517,7 @@ var ts;
                 var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
                 checkIndexConstraints(type);
                 checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
             }
         }
         function checkArrayType(node) {
@@ -28444,6 +28563,10 @@ var ts;
                 if (node.initializer) {
                     checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
                 }
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                }
             }
             if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */) {
                 // We know we don't have a binding pattern or computed name here
@@ -28457,6 +28580,18 @@ var ts;
                 checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             }
         }
+        function areDeclarationFlagsIdentical(left, right) {
+            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
+                return false;
+            }
+            var interestingFlags = 8 /* Private */ |
+                16 /* Protected */ |
+                256 /* Async */ |
+                128 /* Abstract */ |
+                64 /* Readonly */ |
+                32 /* Static */;
+            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
+        }
         function checkVariableDeclaration(node) {
             checkGrammarVariableDeclaration(node);
             return checkVariableLikeDeclaration(node);
@@ -29150,6 +29285,7 @@ var ts;
             var typeWithThis = getTypeWithThisArgument(type);
             var staticType = getTypeOfSymbol(symbol);
             checkTypeParameterListsIdentical(node, symbol);
+            checkClassForDuplicateDeclarations(node);
             var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
             if (baseTypeNode) {
                 var baseTypes = getBaseTypes(type);
@@ -29398,6 +29534,7 @@ var ts;
                         checkIndexConstraints(type);
                     }
                 }
+                checkObjectTypeForDuplicateDeclarations(node);
             }
             ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
                 if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
@@ -30241,14 +30378,11 @@ var ts;
         function checkSourceFileWorker(node) {
             var links = getNodeLinks(node);
             if (!(links.flags & 1 /* TypeChecked */)) {
-                // Check whether the file has declared it is the default lib,
-                // and whether the user has specifically chosen to avoid checking it.
-                if (compilerOptions.skipDefaultLibCheck) {
-                    // If the user specified '--noLib' and a file has a '/// <reference no-default-lib="true"/>',
-                    // then we should treat that file as a default lib.
-                    if (node.hasNoDefaultLib) {
-                        return;
-                    }
+                // If skipLibCheck is enabled, skip type checking if file is a declaration file.
+                // If skipDefaultLibCheck is enabled, skip type checking if file contains a
+                // '/// <reference no-default-lib="true"/>' directive.
+                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
+                    return;
                 }
                 // Grammar checking
                 checkGrammarSourceFile(node);
@@ -30665,7 +30799,7 @@ var ts;
                 return symbol && getTypeOfSymbol(symbol);
             }
             if (ts.isBindingPattern(node)) {
-                return getTypeForVariableLikeDeclaration(node.parent);
+                return getTypeForVariableLikeDeclaration(node.parent, /*includeOptionality*/ true);
             }
             if (isInRightSideOfImportOrExportAssignment(node)) {
                 var symbol = getSymbolAtLocation(node);
@@ -31204,7 +31338,7 @@ var ts;
                 if (file.moduleAugmentations.length) {
                     (augmentations || (augmentations = [])).push(file.moduleAugmentations);
                 }
-                if (file.wasReferenced && file.symbol && file.symbol.globalExports) {
+                if (file.symbol && file.symbol.globalExports) {
                     mergeSymbolTable(globals, file.symbol.globalExports);
                 }
             });
@@ -31787,7 +31921,6 @@ var ts;
                     name_20.kind === 140 /* ComputedPropertyName */) {
                     // If the name is not a ComputedPropertyName, the grammar checking will skip it
                     checkGrammarComputedPropertyName(name_20);
-                    return "continue";
                 }
                 if (prop.kind === 254 /* ShorthandPropertyAssignment */ && !inDestructuring && prop.objectAssignmentInitializer) {
                     // having objectAssignmentInitializer is only valid in ObjectAssignmentPattern
@@ -31829,17 +31962,21 @@ var ts;
                 else {
                     ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
                 }
-                if (!ts.hasProperty(seen, name_20.text)) {
-                    seen[name_20.text] = currentKind;
+                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_20);
+                if (effectiveName === undefined) {
+                    return "continue";
+                }
+                if (!ts.hasProperty(seen, effectiveName)) {
+                    seen[effectiveName] = currentKind;
                 }
                 else {
-                    var existingKind = seen[name_20.text];
+                    var existingKind = seen[effectiveName];
                     if (currentKind === Property && existingKind === Property) {
-                        return "continue";
+                        grammarErrorOnNode(name_20, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_20));
                     }
                     else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
                         if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[name_20.text] = currentKind | existingKind;
+                            seen[effectiveName] = currentKind | existingKind;
                         }
                         else {
                             return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
@@ -41638,8 +41775,8 @@ var ts;
             skipTsx: true,
             traceEnabled: traceEnabled
         };
-        // use typesRoot and fallback to directory that contains tsconfig if typesRoot is not set
-        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : undefined);
+        // use typesRoot and fallback to directory that contains tsconfig or current directory if typesRoot is not set
+        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
         if (traceEnabled) {
             if (containingFile === undefined) {
                 if (rootDir === undefined) {
@@ -42229,12 +42366,25 @@ var ts;
                 }
             }
         }
+        function getDefaultTypeDirectiveNames(rootPath) {
+            var localTypes = ts.combinePaths(rootPath, "types");
+            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
+            var result = [];
+            if (ts.sys.directoryExists(localTypes)) {
+                result = result.concat(ts.sys.getDirectories(localTypes));
+            }
+            if (ts.sys.directoryExists(npmTypes)) {
+                result = result.concat(ts.sys.getDirectories(npmTypes));
+            }
+            return result;
+        }
         function getDefaultLibLocation() {
             return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
         }
         var newLine = ts.getNewLineCharacter(options);
         var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
         return {
+            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
             getSourceFile: getSourceFile,
             getDefaultLibLocation: getDefaultLibLocation,
             getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
@@ -42302,6 +42452,21 @@ var ts;
         }
         return resolutions;
     }
+    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
+        // Use explicit type list from tsconfig.json
+        if (options.types) {
+            return options.types;
+        }
+        // or load all types from the automatic type import fields
+        if (host && host.getDefaultTypeDirectiveNames) {
+            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
+            if (commonRoot) {
+                return host.getDefaultTypeDirectiveNames(commonRoot);
+            }
+        }
+        return undefined;
+    }
+    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
     function createProgram(rootNames, options, host, oldProgram) {
         var program;
         var files = [];
@@ -42340,14 +42505,15 @@ var ts;
         // used to track cases when two file names differ only in casing
         var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
         if (!tryReuseStructureFromOldProgram()) {
+            ts.forEach(rootNames, function (name) { return processRootFile(name, /*isDefaultLib*/ false); });
             // load type declarations specified via 'types' argument
-            if (options.types && options.types.length) {
-                var resolutions = resolveTypeReferenceDirectiveNamesWorker(options.types, /*containingFile*/ undefined);
-                for (var i = 0; i < options.types.length; i++) {
-                    processTypeReferenceDirective(options.types[i], resolutions[i]);
+            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
+            if (typeReferences) {
+                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, /*containingFile*/ undefined);
+                for (var i = 0; i < typeReferences.length; i++) {
+                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
                 }
             }
-            ts.forEach(rootNames, function (name) { return processRootFile(name, /*isDefaultLib*/ false); });
             // Do not process the default library if:
             //  - The '--noLib' flag is used.
             //  - A 'no-default-lib' reference comment is encountered in
@@ -42999,9 +43165,6 @@ var ts;
                 if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
                     reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
                 }
-                if (file_1) {
-                    file_1.wasReferenced = file_1.wasReferenced || isReference;
-                }
                 return file_1;
             }
             // We haven't looked for this file, do so now and cache result
@@ -43015,7 +43178,6 @@ var ts;
             });
             filesByName.set(path, file);
             if (file) {
-                file.wasReferenced = file.wasReferenced || isReference;
                 file.path = path;
                 if (host.useCaseSensitiveFileNames()) {
                     // for case-sensitive file systems check if we've already seen some file with similar filename ignoring case
@@ -43129,19 +43291,7 @@ var ts;
                         !options.noResolve &&
                         i < file.imports.length;
                     if (shouldAddFile) {
-                        var importedFile = findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), /*isDefaultLib*/ false, /*isReference*/ false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
-                        if (importedFile && resolution.isExternalLibraryImport) {
-                            // Since currently irrespective of allowJs, we only look for supportedTypeScript extension external module files,
-                            // this check is ok. Otherwise this would be never true for javascript file
-                            if (!ts.isExternalModule(importedFile) && importedFile.statements.length) {
-                                var start_5 = ts.getTokenPosOfNode(file.imports[i], file);
-                                fileProcessingDiagnostics.add(ts.createFileDiagnostic(file, start_5, file.imports[i].end - start_5, ts.Diagnostics.Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition, importedFile.fileName));
-                            }
-                            else if (importedFile.referencedFiles.length) {
-                                var firstRef = importedFile.referencedFiles[0];
-                                fileProcessingDiagnostics.add(ts.createFileDiagnostic(importedFile, firstRef.pos, firstRef.end - firstRef.pos, ts.Diagnostics.Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition));
-                            }
-                        }
+                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), /*isDefaultLib*/ false, /*isReference*/ false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
                     }
                 }
             }
@@ -43227,7 +43377,7 @@ var ts;
                         }
                     }
                     else {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substututions_for_pattern_0_should_be_an_array, key));
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
                     }
                 }
             }
@@ -43278,15 +43428,21 @@ var ts;
             else if (firstExternalModuleSourceFile && languageVersion < 2 /* ES6 */ && options.module === ts.ModuleKind.None) {
                 // We cannot use createDiagnosticFromNode because nodes do not have parents yet
                 var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting_the_module_compiler_option_in_a_tsconfig_json_file));
+                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
             }
             // Cannot specify module gen target of es6 when below es6
             if (options.module === ts.ModuleKind.ES6 && languageVersion < 2 /* ES6 */) {
                 programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
             }
             // Cannot specify module gen that isn't amd or system with --out
-            if (outFile && options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+            if (outFile) {
+                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+                }
+                else if (options.module === undefined && firstExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
+                }
             }
             // there has to be common source directory if user specified --outdir || --sourceRoot
             // if user specified --mapRoot, there needs to be common source directory if there would be multiple files being emitted
@@ -43384,6 +43540,11 @@ var ts;
             type: "boolean",
             description: ts.Diagnostics.Print_this_message
         },
+        {
+            name: "help",
+            shortName: "?",
+            type: "boolean"
+        },
         {
             name: "init",
             type: "boolean",
@@ -43486,6 +43647,11 @@ var ts;
             name: "skipDefaultLibCheck",
             type: "boolean"
         },
+        {
+            name: "skipLibCheck",
+            type: "boolean",
+            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
+        },
         {
             name: "out",
             type: "string",
@@ -44315,7 +44481,7 @@ var ts;
 (function (ts) {
     var NavigateTo;
     (function (NavigateTo) {
-        function getNavigateToItems(program, cancellationToken, searchValue, maxResultCount) {
+        function getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount) {
             var patternMatcher = ts.createPatternMatcher(searchValue);
             var rawItems = [];
             // This means "compare in a case insensitive manner."
@@ -44354,6 +44520,18 @@ var ts;
                     }
                 }
             });
+            // Remove imports when the imported declaration is already in the list and has the same name.
+            rawItems = ts.filter(rawItems, function (item) {
+                var decl = item.declaration;
+                if (decl.kind === 231 /* ImportClause */ || decl.kind === 234 /* ImportSpecifier */ || decl.kind === 229 /* ImportEqualsDeclaration */) {
+                    var importer = checker.getSymbolAtLocation(decl.name);
+                    var imported = checker.getAliasedSymbol(importer);
+                    return importer.name !== imported.name;
+                }
+                else {
+                    return true;
+                }
+            });
             rawItems.sort(compareNavigateToItems);
             if (maxResultCount !== undefined) {
                 rawItems = rawItems.slice(0, maxResultCount);
@@ -44752,8 +44930,12 @@ var ts;
                         return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberSetAccessorElement);
                     case 153 /* IndexSignature */:
                         return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
+                    case 224 /* EnumDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.enumElement);
                     case 255 /* EnumMember */:
                         return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 222 /* InterfaceDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.interfaceElement);
                     case 151 /* CallSignature */:
                         return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
                     case 152 /* ConstructSignature */:
@@ -45714,7 +45896,7 @@ var ts;
         // To do this, the method will back parse the expression starting at the position required. it will try to parse the current expression as a generic type expression, if it did succeed it 
         // will return the generic identifier that started the expression (e.g. "foo" in "foo<any, |"). It is then up to the caller to ensure that this is a valid generic expression through 
         // looking up the type. The method will also keep track of the parameter index inside the expression.
-        //public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
+        // public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
         //    let token = Syntax.findTokenOnLeft(syntaxTree.sourceUnit(), position, /*includeSkippedTokens*/ true);
         //    if (token && TypeScript.Syntax.hasAncestorOfKind(token, TypeScript.SyntaxKind.TypeParameterList)) {
         //        // We are in the wrong generic list. bail out
@@ -45810,8 +45992,8 @@ var ts;
         //        token = previousToken(token, /*includeSkippedTokens*/ true);
         //    }
         //    return null;
-        //}
-        //private static moveBackUpTillMatchingTokenKind(token: TypeScript.ISyntaxToken, tokenKind: TypeScript.SyntaxKind, matchingTokenKind: TypeScript.SyntaxKind): TypeScript.ISyntaxToken {
+        // }
+        // private static moveBackUpTillMatchingTokenKind(token: TypeScript.ISyntaxToken, tokenKind: TypeScript.SyntaxKind, matchingTokenKind: TypeScript.SyntaxKind): TypeScript.ISyntaxToken {
         //    if (!token || token.kind() !== tokenKind) {
         //        throw TypeScript.Errors.invalidOperation();
         //    }
@@ -45840,7 +46022,7 @@ var ts;
         //    }
         //    // Did not find matching token
         //    return null;
-        //}
+        // }
         var emptyArray = [];
         var ArgumentListKind;
         (function (ArgumentListKind) {
@@ -46601,7 +46783,7 @@ var ts;
         }
         /// finds last node that is considered as candidate for search (isCandidate(node) === true) starting from 'exclusiveStartPosition'
         function findRightmostChildNodeWithTokens(children, exclusiveStartPosition) {
-            for (var i = exclusiveStartPosition - 1; i >= 0; --i) {
+            for (var i = exclusiveStartPosition - 1; i >= 0; i--) {
                 if (nodeHasTokens(children[i])) {
                     return children[i];
                 }
@@ -47337,12 +47519,11 @@ var ts;
                 if (!isStarted) {
                     scanner.scan();
                 }
-                var t;
                 var pos = scanner.getStartPos();
                 // Read leading trivia and token
                 while (pos < endPos) {
-                    var t_1 = scanner.getToken();
-                    if (!ts.isTrivia(t_1)) {
+                    var t = scanner.getToken();
+                    if (!ts.isTrivia(t)) {
                         break;
                     }
                     // consume leading trivia
@@ -47350,7 +47531,7 @@ var ts;
                     var item = {
                         pos: pos,
                         end: scanner.getStartPos(),
-                        kind: t_1
+                        kind: t
                     };
                     pos = scanner.getStartPos();
                     if (!leadingTrivia) {
@@ -47690,6 +47871,7 @@ var ts;
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
 ///<reference path='references.ts' />
+/* tslint:disable:no-null-keyword */
 /* @internal */
 var ts;
 (function (ts) {
@@ -47951,7 +48133,7 @@ var ts;
                 this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 2 /* Space */));
                 this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 8 /* Delete */));
                 // Open Brace braces after function
-                //TypeScript: Function can have return types, which can be made of tons of different token kinds
+                // TypeScript: Function can have return types, which can be made of tons of different token kinds
                 this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
                 // Open Brace braces after TypeScript module/class/interface
                 this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
@@ -48092,17 +48274,17 @@ var ts;
                     case 220 /* FunctionDeclaration */:
                     case 147 /* MethodDeclaration */:
                     case 146 /* MethodSignature */:
-                    //case SyntaxKind.MemberFunctionDeclaration:
+                    // case SyntaxKind.MemberFunctionDeclaration:
                     case 149 /* GetAccessor */:
                     case 150 /* SetAccessor */:
-                    ///case SyntaxKind.MethodSignature:
+                    // case SyntaxKind.MethodSignature:
                     case 151 /* CallSignature */:
                     case 179 /* FunctionExpression */:
                     case 148 /* Constructor */:
                     case 180 /* ArrowFunction */:
-                    //case SyntaxKind.ConstructorDeclaration:
-                    //case SyntaxKind.SimpleArrowFunctionExpression:
-                    //case SyntaxKind.ParenthesizedArrowFunctionExpression:
+                    // case SyntaxKind.ConstructorDeclaration:
+                    // case SyntaxKind.SimpleArrowFunctionExpression:
+                    // case SyntaxKind.ParenthesizedArrowFunctionExpression:
                     case 222 /* InterfaceDeclaration */:
                         return true;
                 }
@@ -48254,6 +48436,7 @@ var ts;
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
 ///<reference path='references.ts' />
+/* tslint:disable:no-null-keyword */
 /* @internal */
 var ts;
 (function (ts) {
@@ -48271,9 +48454,9 @@ var ts;
             };
             RulesMap.prototype.Initialize = function (rules) {
                 this.mapRowLength = 138 /* LastToken */ + 1;
-                this.map = new Array(this.mapRowLength * this.mapRowLength); //new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
+                this.map = new Array(this.mapRowLength * this.mapRowLength); // new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
                 // This array is used only during construction of the rulesbucket in the map
-                var rulesBucketConstructionStateList = new Array(this.map.length); //new Array<RulesBucketConstructionState>(this.map.length);
+                var rulesBucketConstructionStateList = new Array(this.map.length); // new Array<RulesBucketConstructionState>(this.map.length);
                 this.FillRules(rules, rulesBucketConstructionStateList);
                 return this.map;
             };
@@ -48285,7 +48468,7 @@ var ts;
             };
             RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
                 var rulesBucketIndex = (row * this.mapRowLength) + column;
-                //Debug.Assert(rulesBucketIndex < this.map.Length, "Trying to access an index outside the array.");
+                // Debug.Assert(rulesBucketIndex < this.map.Length, "Trying to access an index outside the array.");
                 return rulesBucketIndex;
             };
             RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
@@ -48537,6 +48720,7 @@ var ts;
 ///<reference path='rulesMap.ts' />
 ///<reference path='tokenRange.ts' /> 
 /// <reference path="references.ts"/>
+/* tslint:disable:no-null-keyword */
 /* @internal */
 var ts;
 (function (ts) {
@@ -49058,7 +49242,7 @@ var ts;
                 // if there are any tokens that logically belong to node and interleave child nodes
                 // such tokens will be consumed in processChildNode for for the child that follows them
                 ts.forEachChild(node, function (child) {
-                    processChildNode(child, /*inheritedIndentation*/ -1 /* Unknown */, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListElement*/ false);
+                    processChildNode(child, /*inheritedIndentation*/ -1 /* Unknown */, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListItem*/ false);
                 }, function (nodes) {
                     processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
                 });
@@ -49149,7 +49333,7 @@ var ts;
                     var inheritedIndentation = -1 /* Unknown */;
                     for (var i = 0; i < nodes.length; i++) {
                         var child = nodes[i];
-                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListElement*/ true, /*isFirstListItem*/ i === 0);
+                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListItem*/ true, /*isFirstListItem*/ i === 0);
                     }
                     if (listEndToken !== 0 /* Unknown */) {
                         if (formattingScanner.isOnToken()) {
@@ -49279,7 +49463,7 @@ var ts;
                         // Handle the case where the next line is moved to be the end of this line.
                         // In this case we don't indent the next line in the next pass.
                         if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(/*lineAdded*/ false);
+                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ false);
                         }
                     }
                     else if (rule.Operation.Action & 4 /* NewLine */ && currentStartLine === previousStartLine) {
@@ -49288,7 +49472,7 @@ var ts;
                         // In this case we indent token2 in the next pass but we set
                         // sameLineIndent flag to notify the indenter that the indentation is within the line.
                         if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(/*lineAdded*/ true);
+                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ true);
                         }
                     }
                     // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
@@ -49336,7 +49520,7 @@ var ts;
                 else {
                     parts = [];
                     var startPos = commentRange.pos;
-                    for (var line = startLine; line < endLine; ++line) {
+                    for (var line = startLine; line < endLine; line++) {
                         var endOfLine = ts.getEndLinePosition(line, sourceFile);
                         parts.push({ pos: startPos, end: endOfLine });
                         startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
@@ -49355,7 +49539,7 @@ var ts;
                 }
                 // shift all parts on the delta size
                 var delta = indentation - nonWhitespaceColumnInFirstPart.column;
-                for (var i = startIndex, len = parts.length; i < len; ++i, ++startLine) {
+                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
                     var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
                     var nonWhitespaceCharacterAndColumn = i === 0
                         ? nonWhitespaceColumnInFirstPart
@@ -49371,7 +49555,7 @@ var ts;
                 }
             }
             function trimTrailingWhitespacesForLines(line1, line2, range) {
-                for (var line = line1; line < line2; ++line) {
+                for (var line = line1; line < line2; line++) {
                     var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
                     var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
                     // do not trim whitespaces in comments or template expression
@@ -49422,7 +49606,6 @@ var ts;
                 }
             }
             function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
-                var between;
                 switch (rule.Operation.Action) {
                     case 1 /* Ignore */:
                         // no action required
@@ -49459,14 +49642,6 @@ var ts;
                 }
             }
         }
-        function isSomeBlock(kind) {
-            switch (kind) {
-                case 199 /* Block */:
-                case 226 /* ModuleBlock */:
-                    return true;
-            }
-            return false;
-        }
         function getOpenTokenForList(node, list) {
             switch (node.kind) {
                 case 148 /* Constructor */:
@@ -49525,7 +49700,7 @@ var ts;
                     internedTabsIndentation = [];
                 }
                 if (internedTabsIndentation[tabs] === undefined) {
-                    internedTabsIndentation[tabs] = tabString = repeat('\t', tabs);
+                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
                 }
                 else {
                     tabString = internedTabsIndentation[tabs];
@@ -49550,7 +49725,7 @@ var ts;
             }
             function repeat(value, count) {
                 var s = "";
-                for (var i = 0; i < count; ++i) {
+                for (var i = 0; i < count; i++) {
                     s += value;
                 }
                 return s;
@@ -49866,7 +50041,7 @@ var ts;
                 // walk toward the start of the list starting from current node and check if the line is the same for all items.
                 // if end line for item [i - 1] differs from the start line for item [i] - find column of the first non-whitespace character on the line of item [i]
                 var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
-                for (var i = index - 1; i >= 0; --i) {
+                for (var i = index - 1; i >= 0; i--) {
                     if (list[i].kind === 24 /* CommaToken */) {
                         continue;
                     }
@@ -49893,7 +50068,7 @@ var ts;
             function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
                 var character = 0;
                 var column = 0;
-                for (var pos = startPos; pos < endPos; ++pos) {
+                for (var pos = startPos; pos < endPos; pos++) {
                     var ch = sourceFile.text.charCodeAt(pos);
                     if (!ts.isWhiteSpace(ch)) {
                         break;
@@ -49987,7 +50162,7 @@ var ts;
             Function returns true when the parent node should indent the given child by an explicit rule
             */
             function shouldIndentChildNode(parent, child) {
-                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, false);
+                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, /*indentByDefault*/ false);
             }
             SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
         })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
@@ -50809,49 +50984,55 @@ var ts;
     (function (ScriptElementKind) {
         ScriptElementKind.unknown = "";
         ScriptElementKind.warning = "warning";
-        // predefined type (void) or keyword (class)
+        /** predefined type (void) or keyword (class) */
         ScriptElementKind.keyword = "keyword";
-        // top level script node
+        /** top level script node */
         ScriptElementKind.scriptElement = "script";
-        // module foo {}
+        /** module foo {} */
         ScriptElementKind.moduleElement = "module";
-        // class X {}
+        /** class X {} */
         ScriptElementKind.classElement = "class";
-        // var x = class X {}
+        /** var x = class X {} */
         ScriptElementKind.localClassElement = "local class";
-        // interface Y {}
+        /** interface Y {} */
         ScriptElementKind.interfaceElement = "interface";
-        // type T = ...
+        /** type T = ... */
         ScriptElementKind.typeElement = "type";
-        // enum E
+        /** enum E */
         ScriptElementKind.enumElement = "enum";
-        // Inside module and script only
-        // const v = ..
+        /**
+         * Inside module and script only
+         * const v = ..
+         */
         ScriptElementKind.variableElement = "var";
-        // Inside function
+        /** Inside function */
         ScriptElementKind.localVariableElement = "local var";
-        // Inside module and script only
-        // function f() { }
+        /**
+         * Inside module and script only
+         * function f() { }
+         */
         ScriptElementKind.functionElement = "function";
-        // Inside function
+        /** Inside function */
         ScriptElementKind.localFunctionElement = "local function";
-        // class X { [public|private]* foo() {} }
+        /** class X { [public|private]* foo() {} } */
         ScriptElementKind.memberFunctionElement = "method";
-        // class X { [public|private]* [get|set] foo:number; }
+        /** class X { [public|private]* [get|set] foo:number; } */
         ScriptElementKind.memberGetAccessorElement = "getter";
         ScriptElementKind.memberSetAccessorElement = "setter";
-        // class X { [public|private]* foo:number; }
-        // interface Y { foo:number; }
+        /**
+         * class X { [public|private]* foo:number; }
+         * interface Y { foo:number; }
+         */
         ScriptElementKind.memberVariableElement = "property";
-        // class X { constructor() { } }
+        /** class X { constructor() { } } */
         ScriptElementKind.constructorImplementationElement = "constructor";
-        // interface Y { ():number; }
+        /** interface Y { ():number; } */
         ScriptElementKind.callSignatureElement = "call";
-        // interface Y { []:number; }
+        /** interface Y { []:number; } */
         ScriptElementKind.indexSignatureElement = "index";
-        // interface Y { new():Y; }
+        /** interface Y { new():Y; } */
         ScriptElementKind.constructSignatureElement = "construct";
-        // function foo(*Y*: string)
+        /** function foo(*Y*: string) */
         ScriptElementKind.parameterElement = "parameter";
         ScriptElementKind.typeParameterElement = "type parameter";
         ScriptElementKind.primitiveType = "primitive type";
@@ -52236,9 +52417,9 @@ var ts;
             // Check if the caret is at the end of an identifier; this is a partial identifier that we want to complete: e.g. a.toS|
             // Skip this partial identifier and adjust the contextToken to the token that precedes it.
             if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
-                var start_6 = new Date().getTime();
+                var start_5 = new Date().getTime();
                 contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
-                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_6));
+                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_5));
             }
             // Find the node where completion is requested on.
             // Also determine whether we are trying to complete with members of that node
@@ -52518,13 +52699,13 @@ var ts;
                     || contextToken.kind === 166 /* StringLiteralType */
                     || contextToken.kind === 10 /* RegularExpressionLiteral */
                     || ts.isTemplateLiteralKind(contextToken.kind)) {
-                    var start_7 = contextToken.getStart();
+                    var start_6 = contextToken.getStart();
                     var end = contextToken.getEnd();
                     // To be "in" one of these literals, the position has to be:
                     //   1. entirely within the token text.
                     //   2. at the end position of an unterminated token.
                     //   3. at the end of a regular expression (due to trailing flags like '/foo/g').
-                    if (start_7 < position && position < end) {
+                    if (start_6 < position && position < end) {
                         return true;
                     }
                     if (position === end) {
@@ -53759,8 +53940,7 @@ var ts;
         }
         function getDocumentHighlights(fileName, position, filesToSearch) {
             synchronizeHostData();
-            filesToSearch = ts.map(filesToSearch, ts.normalizeSlashes);
-            var sourceFilesToSearch = ts.filter(program.getSourceFiles(), function (f) { return ts.contains(filesToSearch, f.fileName); });
+            var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
             var sourceFile = getValidSourceFile(fileName);
             var node = ts.getTouchingWord(sourceFile, position);
             if (!node) {
@@ -55150,7 +55330,8 @@ var ts;
         /// NavigateTo
         function getNavigateToItems(searchValue, maxResultCount) {
             synchronizeHostData();
-            return ts.NavigateTo.getNavigateToItems(program, cancellationToken, searchValue, maxResultCount);
+            var checker = getProgram().getTypeChecker();
+            return ts.NavigateTo.getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount);
         }
         function getEmitOutput(fileName) {
             synchronizeHostData();
@@ -57559,6 +57740,9 @@ var ts;
         LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
             return this.shimHost.getCurrentDirectory();
         };
+        LanguageServiceShimHostAdapter.prototype.getDirectories = function (path) {
+            return this.shimHost.getDirectories(path);
+        };
         LanguageServiceShimHostAdapter.prototype.getDefaultLibFileName = function (options) {
             return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
         };
diff --git a/lib/typescriptServices.d.ts b/lib/typescriptServices.d.ts
index cd459201d8b..67530e211bc 100644
--- a/lib/typescriptServices.d.ts
+++ b/lib/typescriptServices.d.ts
@@ -261,7 +261,7 @@ declare namespace ts {
         ModuleDeclaration = 225,
         ModuleBlock = 226,
         CaseBlock = 227,
-        GlobalModuleExportDeclaration = 228,
+        NamespaceExportDeclaration = 228,
         ImportEqualsDeclaration = 229,
         ImportDeclaration = 230,
         ImportClause = 231,
@@ -934,7 +934,7 @@ declare namespace ts {
     interface NamespaceImport extends Declaration {
         name: Identifier;
     }
-    interface GlobalModuleExportDeclaration extends DeclarationStatement {
+    interface NamespaceExportDeclaration extends DeclarationStatement {
         name: Identifier;
         moduleReference: LiteralLikeNode;
     }
@@ -1329,7 +1329,7 @@ declare namespace ts {
         FunctionScopedVariableExcludes = 107454,
         BlockScopedVariableExcludes = 107455,
         ParameterExcludes = 107455,
-        PropertyExcludes = 107455,
+        PropertyExcludes = 0,
         EnumMemberExcludes = 107455,
         FunctionExcludes = 106927,
         ClassExcludes = 899519,
@@ -1554,6 +1554,7 @@ declare namespace ts {
         allowJs?: boolean;
         noImplicitUseStrict?: boolean;
         strictNullChecks?: boolean;
+        skipLibCheck?: boolean;
         listEmittedFiles?: boolean;
         lib?: string[];
         types?: string[];
@@ -1627,6 +1628,7 @@ declare namespace ts {
         trace?(s: string): void;
         directoryExists?(directoryName: string): boolean;
         realpath?(path: string): string;
+        getCurrentDirectory?(): string;
     }
     interface ResolvedModule {
         resolvedFileName: string;
@@ -1650,6 +1652,7 @@ declare namespace ts {
         getCancellationToken?(): CancellationToken;
         getDefaultLibFileName(options: CompilerOptions): string;
         getDefaultLibLocation?(): string;
+        getDefaultTypeDirectiveNames?(rootPath: string): string[];
         writeFile: WriteFileCallback;
         getCurrentDirectory(): string;
         getCanonicalFileName(fileName: string): string;
@@ -1693,6 +1696,7 @@ declare namespace ts {
         createDirectory(path: string): void;
         getExecutingFilePath(): string;
         getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
         readDirectory(path: string, extension?: string, exclude?: string[]): string[];
         getModifiedTime?(path: string): Date;
         createHash?(data: string): string;
@@ -1812,6 +1816,7 @@ declare namespace ts {
     function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
     function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
     function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
+    function getDefaultTypeDirectiveNames(options: CompilerOptions, rootFiles: string[], host: CompilerHost): string[];
     function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program;
 }
 declare namespace ts {
@@ -2345,26 +2350,55 @@ declare namespace ts {
     namespace ScriptElementKind {
         const unknown: string;
         const warning: string;
+        /** predefined type (void) or keyword (class) */
         const keyword: string;
+        /** top level script node */
         const scriptElement: string;
+        /** module foo {} */
         const moduleElement: string;
+        /** class X {} */
         const classElement: string;
+        /** var x = class X {} */
         const localClassElement: string;
+        /** interface Y {} */
         const interfaceElement: string;
+        /** type T = ... */
         const typeElement: string;
+        /** enum E */
         const enumElement: string;
+        /**
+         * Inside module and script only
+         * const v = ..
+         */
         const variableElement: string;
+        /** Inside function */
         const localVariableElement: string;
+        /**
+         * Inside module and script only
+         * function f() { }
+         */
         const functionElement: string;
+        /** Inside function */
         const localFunctionElement: string;
+        /** class X { [public|private]* foo() {} } */
         const memberFunctionElement: string;
+        /** class X { [public|private]* [get|set] foo:number; } */
         const memberGetAccessorElement: string;
         const memberSetAccessorElement: string;
+        /**
+         * class X { [public|private]* foo:number; }
+         * interface Y { foo:number; }
+         */
         const memberVariableElement: string;
+        /** class X { constructor() { } } */
         const constructorImplementationElement: string;
+        /** interface Y { ():number; } */
         const callSignatureElement: string;
+        /** interface Y { []:number; } */
         const indexSignatureElement: string;
+        /** interface Y { new():Y; } */
         const constructSignatureElement: string;
+        /** function foo(*Y*: string) */
         const parameterElement: string;
         const typeParameterElement: string;
         const primitiveType: string;
diff --git a/lib/typescriptServices.js b/lib/typescriptServices.js
index e78eda7b0bb..19fffd35501 100644
--- a/lib/typescriptServices.js
+++ b/lib/typescriptServices.js
@@ -271,7 +271,7 @@ var ts;
         SyntaxKind[SyntaxKind["ModuleDeclaration"] = 225] = "ModuleDeclaration";
         SyntaxKind[SyntaxKind["ModuleBlock"] = 226] = "ModuleBlock";
         SyntaxKind[SyntaxKind["CaseBlock"] = 227] = "CaseBlock";
-        SyntaxKind[SyntaxKind["GlobalModuleExportDeclaration"] = 228] = "GlobalModuleExportDeclaration";
+        SyntaxKind[SyntaxKind["NamespaceExportDeclaration"] = 228] = "NamespaceExportDeclaration";
         SyntaxKind[SyntaxKind["ImportEqualsDeclaration"] = 229] = "ImportEqualsDeclaration";
         SyntaxKind[SyntaxKind["ImportDeclaration"] = 230] = "ImportDeclaration";
         SyntaxKind[SyntaxKind["ImportClause"] = 231] = "ImportClause";
@@ -561,7 +561,7 @@ var ts;
         // they can not merge with anything in the value space
         SymbolFlags[SymbolFlags["BlockScopedVariableExcludes"] = 107455] = "BlockScopedVariableExcludes";
         SymbolFlags[SymbolFlags["ParameterExcludes"] = 107455] = "ParameterExcludes";
-        SymbolFlags[SymbolFlags["PropertyExcludes"] = 107455] = "PropertyExcludes";
+        SymbolFlags[SymbolFlags["PropertyExcludes"] = 0] = "PropertyExcludes";
         SymbolFlags[SymbolFlags["EnumMemberExcludes"] = 107455] = "EnumMemberExcludes";
         SymbolFlags[SymbolFlags["FunctionExcludes"] = 106927] = "FunctionExcludes";
         SymbolFlags[SymbolFlags["ClassExcludes"] = 899519] = "ClassExcludes";
@@ -1841,6 +1841,10 @@ var ts;
                 }
                 return result.sort();
             }
+            function getDirectories(path) {
+                var folder = fso.GetFolder(path);
+                return getNames(folder.subfolders);
+            }
             function readDirectory(path, extension, exclude) {
                 var result = [];
                 exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
@@ -1895,6 +1899,7 @@ var ts;
                 getCurrentDirectory: function () {
                     return new ActiveXObject("WScript.Shell").CurrentDirectory;
                 },
+                getDirectories: getDirectories,
                 readDirectory: readDirectory,
                 exit: function (exitCode) {
                     try {
@@ -2057,6 +2062,9 @@ var ts;
             function directoryExists(path) {
                 return fileSystemEntryExists(path, 1 /* Directory */);
             }
+            function getDirectories(path) {
+                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1 /* Directory */); });
+            }
             function readDirectory(path, extension, exclude) {
                 var result = [];
                 exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
@@ -2157,6 +2165,7 @@ var ts;
                 getCurrentDirectory: function () {
                     return process.cwd();
                 },
+                getDirectories: getDirectories,
                 readDirectory: readDirectory,
                 getModifiedTime: function (path) {
                     try {
@@ -2209,6 +2218,7 @@ var ts;
                 createDirectory: ChakraHost.createDirectory,
                 getExecutingFilePath: function () { return ChakraHost.executingFile; },
                 getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
+                getDirectories: ChakraHost.getDirectories,
                 readDirectory: ChakraHost.readDirectory,
                 exit: ChakraHost.quit,
                 realpath: realpath
@@ -2347,7 +2357,7 @@ var ts;
         or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
         Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
         Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
-        Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting_the_module_compiler_option_in_a_tsconfig_json_file: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting__1148", message: "Cannot compile modules unless the '--module' flag is provided with a valid module type. Consider setting the 'module' compiler option in a 'tsconfig.json' file." },
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
         File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
         new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
         const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
@@ -2717,6 +2727,8 @@ var ts;
         this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
         The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
         The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
+        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
+        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
         Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
         Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
         Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
@@ -2810,7 +2822,7 @@ var ts;
         Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
         Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
         Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
-        Substututions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substututions_for_pattern_0_should_be_an_array_5063", message: "Substututions for pattern '{0}' should be an array." },
+        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
         Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
         Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
         Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
@@ -2823,6 +2835,7 @@ var ts;
         Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
         Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
         Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
+        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
         Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
         Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
         Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
@@ -2924,6 +2937,7 @@ var ts;
         Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
         The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
         Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
         Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
         Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
         Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
@@ -6172,7 +6186,7 @@ var ts;
     // export default ...
     function isAliasSymbolDeclaration(node) {
         return node.kind === 229 /* ImportEqualsDeclaration */ ||
-            node.kind === 228 /* GlobalModuleExportDeclaration */ ||
+            node.kind === 228 /* NamespaceExportDeclaration */ ||
             node.kind === 231 /* ImportClause */ && !!node.name ||
             node.kind === 232 /* NamespaceImport */ ||
             node.kind === 234 /* ImportSpecifier */ ||
@@ -6301,7 +6315,7 @@ var ts;
     }
     ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
     function getPropertyNameForPropertyNameNode(name) {
-        if (name.kind === 69 /* Identifier */ || name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */) {
+        if (name.kind === 69 /* Identifier */ || name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */ || name.kind === 142 /* Parameter */) {
             return name.text;
         }
         if (name.kind === 140 /* ComputedPropertyName */) {
@@ -7773,7 +7787,7 @@ var ts;
             case 231 /* ImportClause */:
                 return visitNode(cbNode, node.name) ||
                     visitNode(cbNode, node.namedBindings);
-            case 228 /* GlobalModuleExportDeclaration */:
+            case 228 /* NamespaceExportDeclaration */:
                 return visitNode(cbNode, node.name);
             case 232 /* NamespaceImport */:
                 return visitNode(cbNode, node.name);
@@ -12182,7 +12196,7 @@ var ts;
             return nextToken() === 39 /* SlashToken */;
         }
         function parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers) {
-            var exportDeclaration = createNode(228 /* GlobalModuleExportDeclaration */, fullStart);
+            var exportDeclaration = createNode(228 /* NamespaceExportDeclaration */, fullStart);
             exportDeclaration.decorators = decorators;
             exportDeclaration.modifiers = modifiers;
             parseExpected(116 /* AsKeyword */);
@@ -15018,10 +15032,10 @@ var ts;
                 case 145 /* PropertyDeclaration */:
                 case 144 /* PropertySignature */:
                 case 266 /* JSDocRecordMember */:
-                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 107455 /* PropertyExcludes */);
+                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
                 case 253 /* PropertyAssignment */:
                 case 254 /* ShorthandPropertyAssignment */:
-                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 107455 /* PropertyExcludes */);
+                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* PropertyExcludes */);
                 case 255 /* EnumMember */:
                     return bindPropertyOrMethodOrAccessor(node, 8 /* EnumMember */, 107455 /* EnumMemberExcludes */);
                 case 247 /* JsxSpreadAttribute */:
@@ -15037,7 +15051,7 @@ var ts;
                     // as other properties in the object literal.  So we use SymbolFlags.PropertyExcludes
                     // so that it will conflict with any other object literal members with the same
                     // name.
-                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 107455 /* PropertyExcludes */ : 99263 /* MethodExcludes */);
+                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 0 /* PropertyExcludes */ : 99263 /* MethodExcludes */);
                 case 220 /* FunctionDeclaration */:
                     return bindFunctionDeclaration(node);
                 case 148 /* Constructor */:
@@ -15081,8 +15095,8 @@ var ts;
                 case 234 /* ImportSpecifier */:
                 case 238 /* ExportSpecifier */:
                     return declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
-                case 228 /* GlobalModuleExportDeclaration */:
-                    return bindGlobalModuleExportDeclaration(node);
+                case 228 /* NamespaceExportDeclaration */:
+                    return bindNamespaceExportDeclaration(node);
                 case 231 /* ImportClause */:
                     return bindImportClause(node);
                 case 236 /* ExportDeclaration */:
@@ -15120,14 +15134,14 @@ var ts;
             }
             else if (boundExpression.kind === 69 /* Identifier */ && node.kind === 235 /* ExportAssignment */) {
                 // An export default clause with an identifier exports all meanings of that identifier
-                declareSymbol(container.symbol.exports, container.symbol, node, 8388608 /* Alias */, 107455 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
+                declareSymbol(container.symbol.exports, container.symbol, node, 8388608 /* Alias */, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
             }
             else {
                 // An export default clause with an expression exports a value
-                declareSymbol(container.symbol.exports, container.symbol, node, 4 /* Property */, 107455 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
+                declareSymbol(container.symbol.exports, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
             }
         }
-        function bindGlobalModuleExportDeclaration(node) {
+        function bindNamespaceExportDeclaration(node) {
             if (node.modifiers && node.modifiers.length) {
                 file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
             }
@@ -15186,7 +15200,7 @@ var ts;
             if (container.kind === 179 /* FunctionExpression */ || container.kind === 220 /* FunctionDeclaration */) {
                 container.symbol.members = container.symbol.members || {};
                 // It's acceptable for multiple 'this' assignments of the same identifier to occur
-                declareSymbol(container.symbol.members, container.symbol, node, 4 /* Property */, 107455 /* PropertyExcludes */ & ~4 /* Property */);
+                declareSymbol(container.symbol.members, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ & ~4 /* Property */);
             }
         }
         function bindPrototypePropertyAssignment(node) {
@@ -15209,7 +15223,7 @@ var ts;
                 funcSymbol.members = {};
             }
             // Declare the method/property
-            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4 /* Property */, 107455 /* PropertyExcludes */);
+            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4 /* Property */, 0 /* PropertyExcludes */);
         }
         function bindCallExpression(node) {
             // We're only inspecting call expressions to detect CommonJS modules, so we can skip
@@ -15310,7 +15324,7 @@ var ts;
             // containing class.
             if (ts.isParameterPropertyDeclaration(node)) {
                 var classDeclaration = node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */, 107455 /* PropertyExcludes */);
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */);
             }
         }
         function bindFunctionDeclaration(node) {
@@ -15696,7 +15710,7 @@ var ts;
             if (flags & 1 /* FunctionScopedVariable */)
                 result |= 107454 /* FunctionScopedVariableExcludes */;
             if (flags & 4 /* Property */)
-                result |= 107455 /* PropertyExcludes */;
+                result |= 0 /* PropertyExcludes */;
             if (flags & 8 /* EnumMember */)
                 result |= 107455 /* EnumMemberExcludes */;
             if (flags & 16 /* Function */)
@@ -15982,6 +15996,7 @@ var ts;
             var propertyWithInvalidInitializer;
             var errorLocation = location;
             var grandparent;
+            var isInExternalModule = false;
             loop: while (location) {
                 // Locals of a source file are not in scope (because they get merged into the global symbol table)
                 if (location.locals && !isGlobalSourceFile(location)) {
@@ -16024,6 +16039,7 @@ var ts;
                     case 256 /* SourceFile */:
                         if (!ts.isExternalOrCommonJsModule(location))
                             break;
+                        isInExternalModule = true;
                     case 225 /* ModuleDeclaration */:
                         var moduleExports = getSymbolOfNode(location).exports;
                         if (location.kind === 256 /* SourceFile */ || ts.isAmbientModule(location)) {
@@ -16207,6 +16223,13 @@ var ts;
                         checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
                     }
                 }
+                // If we're in an external module, we can't reference symbols created from UMD export declarations
+                if (result && isInExternalModule) {
+                    var decls = result.declarations;
+                    if (decls && decls.length === 1 && decls[0].kind === 228 /* NamespaceExportDeclaration */) {
+                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
+                    }
+                }
             }
             return result;
         }
@@ -16409,7 +16432,7 @@ var ts;
                     return getTargetOfExportSpecifier(node);
                 case 235 /* ExportAssignment */:
                     return getTargetOfExportAssignment(node);
-                case 228 /* GlobalModuleExportDeclaration */:
+                case 228 /* NamespaceExportDeclaration */:
                     return getTargetOfGlobalModuleExportDeclaration(node);
             }
         }
@@ -17883,7 +17906,7 @@ var ts;
         // assigned by contextual typing.
         function getTypeForBindingElementParent(node) {
             var symbol = getSymbolOfNode(node);
-            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false);
         }
         function getTextOfPropertyName(name) {
             switch (name.kind) {
@@ -18009,7 +18032,7 @@ var ts;
             return strictNullChecks && optional ? addNullableKind(type, 32 /* Undefined */) : type;
         }
         // Return the inferred type for a variable, parameter, or property declaration
-        function getTypeForVariableLikeDeclaration(declaration) {
+        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
             if (declaration.flags & 134217728 /* JavaScriptFile */) {
                 // If this is a variable in a JavaScript file, then use the JSDoc type (if it has
                 // one as its type), otherwise fallback to the below standard TS codepaths to
@@ -18035,7 +18058,7 @@ var ts;
             }
             // Use type from type annotation if one is present
             if (declaration.type) {
-                return addOptionality(getTypeFromTypeNode(declaration.type), /*optional*/ !!declaration.questionToken);
+                return addOptionality(getTypeFromTypeNode(declaration.type), /*optional*/ declaration.questionToken && includeOptionality);
             }
             if (declaration.kind === 142 /* Parameter */) {
                 var func = declaration.parent;
@@ -18056,12 +18079,12 @@ var ts;
                     ? getContextuallyTypedThisType(func)
                     : getContextuallyTypedParameterType(declaration);
                 if (type) {
-                    return addOptionality(type, /*optional*/ !!declaration.questionToken);
+                    return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
                 }
             }
             // Use the type of the initializer expression if one is present
             if (declaration.initializer) {
-                return addOptionality(checkExpressionCached(declaration.initializer), /*optional*/ !!declaration.questionToken);
+                return addOptionality(checkExpressionCached(declaration.initializer), /*optional*/ declaration.questionToken && includeOptionality);
             }
             // If it is a short-hand property assignment, use the type of the identifier
             if (declaration.kind === 254 /* ShorthandPropertyAssignment */) {
@@ -18155,7 +18178,7 @@ var ts;
         // binding pattern [x, s = ""]. Because the contextual type is a tuple type, the resulting type of [1, "one"] is the
         // tuple type [number, string]. Thus, the type inferred for 'x' is number and the type inferred for 's' is string.
         function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
-            var type = getTypeForVariableLikeDeclaration(declaration);
+            var type = getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
             if (type) {
                 if (reportErrors) {
                     reportErrorsFromWidening(declaration, type);
@@ -20719,7 +20742,7 @@ var ts;
                     return isIdenticalTo(source, target);
                 }
                 if (!(target.flags & 134217728 /* Never */)) {
-                    if (target.flags & 1 /* Any */)
+                    if (target.flags & 1 /* Any */ || source.flags & 134217728 /* Never */)
                         return -1 /* True */;
                     if (source.flags & 32 /* Undefined */) {
                         if (!strictNullChecks || target.flags & (32 /* Undefined */ | 16 /* Void */) || source === emptyArrayElementType)
@@ -20739,7 +20762,7 @@ var ts;
                     if (source.flags & 256 /* StringLiteral */ && target === stringType)
                         return -1 /* True */;
                     if (relation === assignableRelation || relation === comparableRelation) {
-                        if (source.flags & (1 /* Any */ | 134217728 /* Never */))
+                        if (source.flags & 1 /* Any */)
                             return -1 /* True */;
                         if (source === numberType && target.flags & 128 /* Enum */)
                             return -1 /* True */;
@@ -21634,41 +21657,52 @@ var ts;
                 getSignaturesOfType(type, 0 /* Call */).length === 0 &&
                 getSignaturesOfType(type, 1 /* Construct */).length === 0;
         }
+        function createTransientSymbol(source, type) {
+            var symbol = createSymbol(source.flags | 67108864 /* Transient */, source.name);
+            symbol.declarations = source.declarations;
+            symbol.parent = source.parent;
+            symbol.type = type;
+            symbol.target = source;
+            if (source.valueDeclaration) {
+                symbol.valueDeclaration = source.valueDeclaration;
+            }
+            return symbol;
+        }
+        function transformTypeOfMembers(type, f) {
+            var members = {};
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var property = _a[_i];
+                var original = getTypeOfSymbol(property);
+                var updated = f(original);
+                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
+            }
+            ;
+            return members;
+        }
+        /**
+         * If the the provided object literal is subject to the excess properties check,
+         * create a new that is exempt. Recursively mark object literal members as exempt.
+         * Leave signatures alone since they are not subject to the check.
+         */
         function getRegularTypeOfObjectLiteral(type) {
-            if (type.flags & 1048576 /* FreshObjectLiteral */) {
-                var regularType = type.regularType;
-                if (!regularType) {
-                    regularType = createType(type.flags & ~1048576 /* FreshObjectLiteral */);
-                    regularType.symbol = type.symbol;
-                    regularType.members = type.members;
-                    regularType.properties = type.properties;
-                    regularType.callSignatures = type.callSignatures;
-                    regularType.constructSignatures = type.constructSignatures;
-                    regularType.stringIndexInfo = type.stringIndexInfo;
-                    regularType.numberIndexInfo = type.numberIndexInfo;
-                    type.regularType = regularType;
-                }
+            if (!(type.flags & 1048576 /* FreshObjectLiteral */)) {
+                return type;
+            }
+            var regularType = type.regularType;
+            if (regularType) {
                 return regularType;
             }
-            return type;
+            var resolved = type;
+            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
+            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
+            regularNew.flags = resolved.flags & ~1048576 /* FreshObjectLiteral */;
+            type.regularType = regularNew;
+            return regularNew;
         }
         function getWidenedTypeOfObjectLiteral(type) {
-            var properties = getPropertiesOfObjectType(type);
-            var members = {};
-            ts.forEach(properties, function (p) {
-                var propType = getTypeOfSymbol(p);
-                var widenedType = getWidenedType(propType);
-                if (propType !== widenedType) {
-                    var symbol = createSymbol(p.flags | 67108864 /* Transient */, p.name);
-                    symbol.declarations = p.declarations;
-                    symbol.parent = p.parent;
-                    symbol.type = widenedType;
-                    symbol.target = p;
-                    if (p.valueDeclaration)
-                        symbol.valueDeclaration = p.valueDeclaration;
-                    p = symbol;
-                }
-                members[p.name] = p;
+            var members = transformTypeOfMembers(type, function (prop) {
+                var widened = getWidenedType(prop);
+                return prop === widened ? prop : widened;
             });
             var stringIndexInfo = getIndexInfoOfType(type, 0 /* String */);
             var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
@@ -23224,7 +23258,7 @@ var ts;
             }
             return nodeCheckFlag === 512 /* SuperStatic */
                 ? getBaseConstructorTypeOfClass(classType)
-                : baseClassType;
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
             function isLegalUsageOfSuperExpression(container) {
                 if (!container) {
                     return false;
@@ -25936,7 +25970,7 @@ var ts;
                 var types = void 0;
                 var funcIsGenerator = !!func.asteriskToken;
                 if (funcIsGenerator) {
-                    types = checkAndAggregateYieldOperandTypes(func.body, contextualMapper);
+                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
                     if (types.length === 0) {
                         var iterableIteratorAny = createIterableIteratorType(anyType);
                         if (compilerOptions.noImplicitAny) {
@@ -25946,8 +25980,7 @@ var ts;
                     }
                 }
                 else {
-                    var hasImplicitReturn = !!(func.flags & 32768 /* HasImplicitReturn */);
-                    types = checkAndAggregateReturnExpressionTypes(func.body, contextualMapper, isAsync, hasImplicitReturn);
+                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
                     if (!types) {
                         return neverType;
                     }
@@ -26001,9 +26034,9 @@ var ts;
                 return widenedType;
             }
         }
-        function checkAndAggregateYieldOperandTypes(body, contextualMapper) {
+        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
             var aggregatedTypes = [];
-            ts.forEachYieldExpression(body, function (yieldExpression) {
+            ts.forEachYieldExpression(func.body, function (yieldExpression) {
                 var expr = yieldExpression.expression;
                 if (expr) {
                     var type = checkExpressionCached(expr, contextualMapper);
@@ -26018,10 +26051,12 @@ var ts;
             });
             return aggregatedTypes;
         }
-        function checkAndAggregateReturnExpressionTypes(body, contextualMapper, isAsync, hasImplicitReturn) {
+        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
+            var isAsync = ts.isAsyncFunctionLike(func);
             var aggregatedTypes = [];
-            var hasOmittedExpressions = false;
-            ts.forEachReturnStatement(body, function (returnStatement) {
+            var hasReturnWithNoExpression = !!(func.flags & 32768 /* HasImplicitReturn */);
+            var hasReturnOfTypeNever = false;
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
                 var expr = returnStatement.expression;
                 if (expr) {
                     var type = checkExpressionCached(expr, contextualMapper);
@@ -26030,20 +26065,24 @@ var ts;
                         // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
                         // return type of the body should be unwrapped to its awaited type, which should be wrapped in
                         // the native Promise<T> type by the caller.
-                        type = checkAwaitedType(type, body.parent, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
                     }
-                    if (type !== neverType && !ts.contains(aggregatedTypes, type)) {
+                    if (type === neverType) {
+                        hasReturnOfTypeNever = true;
+                    }
+                    else if (!ts.contains(aggregatedTypes, type)) {
                         aggregatedTypes.push(type);
                     }
                 }
                 else {
-                    hasOmittedExpressions = true;
+                    hasReturnWithNoExpression = true;
                 }
             });
-            if (aggregatedTypes.length === 0 && !hasOmittedExpressions && !hasImplicitReturn) {
+            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
+                func.kind === 179 /* FunctionExpression */ || func.kind === 180 /* ArrowFunction */)) {
                 return undefined;
             }
-            if (strictNullChecks && aggregatedTypes.length && (hasOmittedExpressions || hasImplicitReturn)) {
+            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
                 if (!ts.contains(aggregatedTypes, undefinedType)) {
                     aggregatedTypes.push(undefinedType);
                 }
@@ -26215,8 +26254,14 @@ var ts;
                 if (symbol.flags & 4 /* Property */ &&
                     (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) &&
                     expr.expression.kind === 97 /* ThisKeyword */) {
+                    // Look for if this is the constructor for the class that `symbol` is a property of.
                     var func = ts.getContainingFunction(expr);
-                    return !(func && func.kind === 148 /* Constructor */ && func.parent === symbol.valueDeclaration.parent);
+                    if (!(func && func.kind === 148 /* Constructor */))
+                        return true;
+                    // If func.parent is a class and symbol is a (readonly) property of that class, or
+                    // if func is a constructor and symbol is a (readonly) parameter property declared in it,
+                    // then symbol is writeable here.
+                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
                 }
                 return true;
             }
@@ -27148,6 +27193,79 @@ var ts;
                 }
             }
         }
+        function checkClassForDuplicateDeclarations(node) {
+            var getter = 1, setter = 2, property = getter | setter;
+            var instanceNames = {};
+            var staticNames = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 148 /* Constructor */) {
+                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                        var param = _c[_b];
+                        if (ts.isParameterPropertyDeclaration(param)) {
+                            addName(instanceNames, param.name, param.name.text, property);
+                        }
+                    }
+                }
+                else {
+                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113 /* StaticKeyword */; });
+                    var names = static ? staticNames : instanceNames;
+                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
+                    if (memberName) {
+                        switch (member.kind) {
+                            case 149 /* GetAccessor */:
+                                addName(names, member.name, memberName, getter);
+                                break;
+                            case 150 /* SetAccessor */:
+                                addName(names, member.name, memberName, setter);
+                                break;
+                            case 145 /* PropertyDeclaration */:
+                                addName(names, member.name, memberName, property);
+                                break;
+                        }
+                    }
+                }
+            }
+            function addName(names, location, name, meaning) {
+                if (ts.hasProperty(names, name)) {
+                    var prev = names[name];
+                    if (prev & meaning) {
+                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                    }
+                    else {
+                        names[name] = prev | meaning;
+                    }
+                }
+                else {
+                    names[name] = meaning;
+                }
+            }
+        }
+        function checkObjectTypeForDuplicateDeclarations(node) {
+            var names = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind == 144 /* PropertySignature */) {
+                    var memberName = void 0;
+                    switch (member.name.kind) {
+                        case 9 /* StringLiteral */:
+                        case 8 /* NumericLiteral */:
+                        case 69 /* Identifier */:
+                            memberName = member.name.text;
+                            break;
+                        default:
+                            continue;
+                    }
+                    if (ts.hasProperty(names, memberName)) {
+                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                    }
+                    else {
+                        names[memberName] = true;
+                    }
+                }
+            }
+        }
         function checkTypeForDuplicateIndexSignatures(node) {
             if (node.kind === 222 /* InterfaceDeclaration */) {
                 var nodeSymbol = getSymbolOfNode(node);
@@ -27399,6 +27517,7 @@ var ts;
                 var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
                 checkIndexConstraints(type);
                 checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
             }
         }
         function checkArrayType(node) {
@@ -28444,6 +28563,10 @@ var ts;
                 if (node.initializer) {
                     checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
                 }
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                }
             }
             if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */) {
                 // We know we don't have a binding pattern or computed name here
@@ -28457,6 +28580,18 @@ var ts;
                 checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
             }
         }
+        function areDeclarationFlagsIdentical(left, right) {
+            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
+                return false;
+            }
+            var interestingFlags = 8 /* Private */ |
+                16 /* Protected */ |
+                256 /* Async */ |
+                128 /* Abstract */ |
+                64 /* Readonly */ |
+                32 /* Static */;
+            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
+        }
         function checkVariableDeclaration(node) {
             checkGrammarVariableDeclaration(node);
             return checkVariableLikeDeclaration(node);
@@ -29150,6 +29285,7 @@ var ts;
             var typeWithThis = getTypeWithThisArgument(type);
             var staticType = getTypeOfSymbol(symbol);
             checkTypeParameterListsIdentical(node, symbol);
+            checkClassForDuplicateDeclarations(node);
             var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
             if (baseTypeNode) {
                 var baseTypes = getBaseTypes(type);
@@ -29398,6 +29534,7 @@ var ts;
                         checkIndexConstraints(type);
                     }
                 }
+                checkObjectTypeForDuplicateDeclarations(node);
             }
             ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
                 if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
@@ -30241,14 +30378,11 @@ var ts;
         function checkSourceFileWorker(node) {
             var links = getNodeLinks(node);
             if (!(links.flags & 1 /* TypeChecked */)) {
-                // Check whether the file has declared it is the default lib,
-                // and whether the user has specifically chosen to avoid checking it.
-                if (compilerOptions.skipDefaultLibCheck) {
-                    // If the user specified '--noLib' and a file has a '/// <reference no-default-lib="true"/>',
-                    // then we should treat that file as a default lib.
-                    if (node.hasNoDefaultLib) {
-                        return;
-                    }
+                // If skipLibCheck is enabled, skip type checking if file is a declaration file.
+                // If skipDefaultLibCheck is enabled, skip type checking if file contains a
+                // '/// <reference no-default-lib="true"/>' directive.
+                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
+                    return;
                 }
                 // Grammar checking
                 checkGrammarSourceFile(node);
@@ -30665,7 +30799,7 @@ var ts;
                 return symbol && getTypeOfSymbol(symbol);
             }
             if (ts.isBindingPattern(node)) {
-                return getTypeForVariableLikeDeclaration(node.parent);
+                return getTypeForVariableLikeDeclaration(node.parent, /*includeOptionality*/ true);
             }
             if (isInRightSideOfImportOrExportAssignment(node)) {
                 var symbol = getSymbolAtLocation(node);
@@ -31204,7 +31338,7 @@ var ts;
                 if (file.moduleAugmentations.length) {
                     (augmentations || (augmentations = [])).push(file.moduleAugmentations);
                 }
-                if (file.wasReferenced && file.symbol && file.symbol.globalExports) {
+                if (file.symbol && file.symbol.globalExports) {
                     mergeSymbolTable(globals, file.symbol.globalExports);
                 }
             });
@@ -31787,7 +31921,6 @@ var ts;
                     name_20.kind === 140 /* ComputedPropertyName */) {
                     // If the name is not a ComputedPropertyName, the grammar checking will skip it
                     checkGrammarComputedPropertyName(name_20);
-                    return "continue";
                 }
                 if (prop.kind === 254 /* ShorthandPropertyAssignment */ && !inDestructuring && prop.objectAssignmentInitializer) {
                     // having objectAssignmentInitializer is only valid in ObjectAssignmentPattern
@@ -31829,17 +31962,21 @@ var ts;
                 else {
                     ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
                 }
-                if (!ts.hasProperty(seen, name_20.text)) {
-                    seen[name_20.text] = currentKind;
+                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_20);
+                if (effectiveName === undefined) {
+                    return "continue";
+                }
+                if (!ts.hasProperty(seen, effectiveName)) {
+                    seen[effectiveName] = currentKind;
                 }
                 else {
-                    var existingKind = seen[name_20.text];
+                    var existingKind = seen[effectiveName];
                     if (currentKind === Property && existingKind === Property) {
-                        return "continue";
+                        grammarErrorOnNode(name_20, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_20));
                     }
                     else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
                         if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[name_20.text] = currentKind | existingKind;
+                            seen[effectiveName] = currentKind | existingKind;
                         }
                         else {
                             return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
@@ -41638,8 +41775,8 @@ var ts;
             skipTsx: true,
             traceEnabled: traceEnabled
         };
-        // use typesRoot and fallback to directory that contains tsconfig if typesRoot is not set
-        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : undefined);
+        // use typesRoot and fallback to directory that contains tsconfig or current directory if typesRoot is not set
+        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
         if (traceEnabled) {
             if (containingFile === undefined) {
                 if (rootDir === undefined) {
@@ -42229,12 +42366,25 @@ var ts;
                 }
             }
         }
+        function getDefaultTypeDirectiveNames(rootPath) {
+            var localTypes = ts.combinePaths(rootPath, "types");
+            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
+            var result = [];
+            if (ts.sys.directoryExists(localTypes)) {
+                result = result.concat(ts.sys.getDirectories(localTypes));
+            }
+            if (ts.sys.directoryExists(npmTypes)) {
+                result = result.concat(ts.sys.getDirectories(npmTypes));
+            }
+            return result;
+        }
         function getDefaultLibLocation() {
             return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
         }
         var newLine = ts.getNewLineCharacter(options);
         var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
         return {
+            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
             getSourceFile: getSourceFile,
             getDefaultLibLocation: getDefaultLibLocation,
             getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
@@ -42302,6 +42452,21 @@ var ts;
         }
         return resolutions;
     }
+    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
+        // Use explicit type list from tsconfig.json
+        if (options.types) {
+            return options.types;
+        }
+        // or load all types from the automatic type import fields
+        if (host && host.getDefaultTypeDirectiveNames) {
+            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
+            if (commonRoot) {
+                return host.getDefaultTypeDirectiveNames(commonRoot);
+            }
+        }
+        return undefined;
+    }
+    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
     function createProgram(rootNames, options, host, oldProgram) {
         var program;
         var files = [];
@@ -42340,14 +42505,15 @@ var ts;
         // used to track cases when two file names differ only in casing
         var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
         if (!tryReuseStructureFromOldProgram()) {
+            ts.forEach(rootNames, function (name) { return processRootFile(name, /*isDefaultLib*/ false); });
             // load type declarations specified via 'types' argument
-            if (options.types && options.types.length) {
-                var resolutions = resolveTypeReferenceDirectiveNamesWorker(options.types, /*containingFile*/ undefined);
-                for (var i = 0; i < options.types.length; i++) {
-                    processTypeReferenceDirective(options.types[i], resolutions[i]);
+            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
+            if (typeReferences) {
+                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, /*containingFile*/ undefined);
+                for (var i = 0; i < typeReferences.length; i++) {
+                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
                 }
             }
-            ts.forEach(rootNames, function (name) { return processRootFile(name, /*isDefaultLib*/ false); });
             // Do not process the default library if:
             //  - The '--noLib' flag is used.
             //  - A 'no-default-lib' reference comment is encountered in
@@ -42999,9 +43165,6 @@ var ts;
                 if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
                     reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
                 }
-                if (file_1) {
-                    file_1.wasReferenced = file_1.wasReferenced || isReference;
-                }
                 return file_1;
             }
             // We haven't looked for this file, do so now and cache result
@@ -43015,7 +43178,6 @@ var ts;
             });
             filesByName.set(path, file);
             if (file) {
-                file.wasReferenced = file.wasReferenced || isReference;
                 file.path = path;
                 if (host.useCaseSensitiveFileNames()) {
                     // for case-sensitive file systems check if we've already seen some file with similar filename ignoring case
@@ -43129,19 +43291,7 @@ var ts;
                         !options.noResolve &&
                         i < file.imports.length;
                     if (shouldAddFile) {
-                        var importedFile = findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), /*isDefaultLib*/ false, /*isReference*/ false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
-                        if (importedFile && resolution.isExternalLibraryImport) {
-                            // Since currently irrespective of allowJs, we only look for supportedTypeScript extension external module files,
-                            // this check is ok. Otherwise this would be never true for javascript file
-                            if (!ts.isExternalModule(importedFile) && importedFile.statements.length) {
-                                var start_5 = ts.getTokenPosOfNode(file.imports[i], file);
-                                fileProcessingDiagnostics.add(ts.createFileDiagnostic(file, start_5, file.imports[i].end - start_5, ts.Diagnostics.Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition, importedFile.fileName));
-                            }
-                            else if (importedFile.referencedFiles.length) {
-                                var firstRef = importedFile.referencedFiles[0];
-                                fileProcessingDiagnostics.add(ts.createFileDiagnostic(importedFile, firstRef.pos, firstRef.end - firstRef.pos, ts.Diagnostics.Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition));
-                            }
-                        }
+                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), /*isDefaultLib*/ false, /*isReference*/ false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
                     }
                 }
             }
@@ -43227,7 +43377,7 @@ var ts;
                         }
                     }
                     else {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substututions_for_pattern_0_should_be_an_array, key));
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
                     }
                 }
             }
@@ -43278,15 +43428,21 @@ var ts;
             else if (firstExternalModuleSourceFile && languageVersion < 2 /* ES6 */ && options.module === ts.ModuleKind.None) {
                 // We cannot use createDiagnosticFromNode because nodes do not have parents yet
                 var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_unless_the_module_flag_is_provided_with_a_valid_module_type_Consider_setting_the_module_compiler_option_in_a_tsconfig_json_file));
+                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
             }
             // Cannot specify module gen target of es6 when below es6
             if (options.module === ts.ModuleKind.ES6 && languageVersion < 2 /* ES6 */) {
                 programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
             }
             // Cannot specify module gen that isn't amd or system with --out
-            if (outFile && options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+            if (outFile) {
+                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+                }
+                else if (options.module === undefined && firstExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
+                }
             }
             // there has to be common source directory if user specified --outdir || --sourceRoot
             // if user specified --mapRoot, there needs to be common source directory if there would be multiple files being emitted
@@ -43384,6 +43540,11 @@ var ts;
             type: "boolean",
             description: ts.Diagnostics.Print_this_message
         },
+        {
+            name: "help",
+            shortName: "?",
+            type: "boolean"
+        },
         {
             name: "init",
             type: "boolean",
@@ -43486,6 +43647,11 @@ var ts;
             name: "skipDefaultLibCheck",
             type: "boolean"
         },
+        {
+            name: "skipLibCheck",
+            type: "boolean",
+            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
+        },
         {
             name: "out",
             type: "string",
@@ -44315,7 +44481,7 @@ var ts;
 (function (ts) {
     var NavigateTo;
     (function (NavigateTo) {
-        function getNavigateToItems(program, cancellationToken, searchValue, maxResultCount) {
+        function getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount) {
             var patternMatcher = ts.createPatternMatcher(searchValue);
             var rawItems = [];
             // This means "compare in a case insensitive manner."
@@ -44354,6 +44520,18 @@ var ts;
                     }
                 }
             });
+            // Remove imports when the imported declaration is already in the list and has the same name.
+            rawItems = ts.filter(rawItems, function (item) {
+                var decl = item.declaration;
+                if (decl.kind === 231 /* ImportClause */ || decl.kind === 234 /* ImportSpecifier */ || decl.kind === 229 /* ImportEqualsDeclaration */) {
+                    var importer = checker.getSymbolAtLocation(decl.name);
+                    var imported = checker.getAliasedSymbol(importer);
+                    return importer.name !== imported.name;
+                }
+                else {
+                    return true;
+                }
+            });
             rawItems.sort(compareNavigateToItems);
             if (maxResultCount !== undefined) {
                 rawItems = rawItems.slice(0, maxResultCount);
@@ -44752,8 +44930,12 @@ var ts;
                         return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberSetAccessorElement);
                     case 153 /* IndexSignature */:
                         return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
+                    case 224 /* EnumDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.enumElement);
                     case 255 /* EnumMember */:
                         return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 222 /* InterfaceDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.interfaceElement);
                     case 151 /* CallSignature */:
                         return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
                     case 152 /* ConstructSignature */:
@@ -45714,7 +45896,7 @@ var ts;
         // To do this, the method will back parse the expression starting at the position required. it will try to parse the current expression as a generic type expression, if it did succeed it 
         // will return the generic identifier that started the expression (e.g. "foo" in "foo<any, |"). It is then up to the caller to ensure that this is a valid generic expression through 
         // looking up the type. The method will also keep track of the parameter index inside the expression.
-        //public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
+        // public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
         //    let token = Syntax.findTokenOnLeft(syntaxTree.sourceUnit(), position, /*includeSkippedTokens*/ true);
         //    if (token && TypeScript.Syntax.hasAncestorOfKind(token, TypeScript.SyntaxKind.TypeParameterList)) {
         //        // We are in the wrong generic list. bail out
@@ -45810,8 +45992,8 @@ var ts;
         //        token = previousToken(token, /*includeSkippedTokens*/ true);
         //    }
         //    return null;
-        //}
-        //private static moveBackUpTillMatchingTokenKind(token: TypeScript.ISyntaxToken, tokenKind: TypeScript.SyntaxKind, matchingTokenKind: TypeScript.SyntaxKind): TypeScript.ISyntaxToken {
+        // }
+        // private static moveBackUpTillMatchingTokenKind(token: TypeScript.ISyntaxToken, tokenKind: TypeScript.SyntaxKind, matchingTokenKind: TypeScript.SyntaxKind): TypeScript.ISyntaxToken {
         //    if (!token || token.kind() !== tokenKind) {
         //        throw TypeScript.Errors.invalidOperation();
         //    }
@@ -45840,7 +46022,7 @@ var ts;
         //    }
         //    // Did not find matching token
         //    return null;
-        //}
+        // }
         var emptyArray = [];
         var ArgumentListKind;
         (function (ArgumentListKind) {
@@ -46601,7 +46783,7 @@ var ts;
         }
         /// finds last node that is considered as candidate for search (isCandidate(node) === true) starting from 'exclusiveStartPosition'
         function findRightmostChildNodeWithTokens(children, exclusiveStartPosition) {
-            for (var i = exclusiveStartPosition - 1; i >= 0; --i) {
+            for (var i = exclusiveStartPosition - 1; i >= 0; i--) {
                 if (nodeHasTokens(children[i])) {
                     return children[i];
                 }
@@ -47337,12 +47519,11 @@ var ts;
                 if (!isStarted) {
                     scanner.scan();
                 }
-                var t;
                 var pos = scanner.getStartPos();
                 // Read leading trivia and token
                 while (pos < endPos) {
-                    var t_1 = scanner.getToken();
-                    if (!ts.isTrivia(t_1)) {
+                    var t = scanner.getToken();
+                    if (!ts.isTrivia(t)) {
                         break;
                     }
                     // consume leading trivia
@@ -47350,7 +47531,7 @@ var ts;
                     var item = {
                         pos: pos,
                         end: scanner.getStartPos(),
-                        kind: t_1
+                        kind: t
                     };
                     pos = scanner.getStartPos();
                     if (!leadingTrivia) {
@@ -47690,6 +47871,7 @@ var ts;
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
 ///<reference path='references.ts' />
+/* tslint:disable:no-null-keyword */
 /* @internal */
 var ts;
 (function (ts) {
@@ -47951,7 +48133,7 @@ var ts;
                 this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 2 /* Space */));
                 this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 8 /* Delete */));
                 // Open Brace braces after function
-                //TypeScript: Function can have return types, which can be made of tons of different token kinds
+                // TypeScript: Function can have return types, which can be made of tons of different token kinds
                 this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
                 // Open Brace braces after TypeScript module/class/interface
                 this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
@@ -48092,17 +48274,17 @@ var ts;
                     case 220 /* FunctionDeclaration */:
                     case 147 /* MethodDeclaration */:
                     case 146 /* MethodSignature */:
-                    //case SyntaxKind.MemberFunctionDeclaration:
+                    // case SyntaxKind.MemberFunctionDeclaration:
                     case 149 /* GetAccessor */:
                     case 150 /* SetAccessor */:
-                    ///case SyntaxKind.MethodSignature:
+                    // case SyntaxKind.MethodSignature:
                     case 151 /* CallSignature */:
                     case 179 /* FunctionExpression */:
                     case 148 /* Constructor */:
                     case 180 /* ArrowFunction */:
-                    //case SyntaxKind.ConstructorDeclaration:
-                    //case SyntaxKind.SimpleArrowFunctionExpression:
-                    //case SyntaxKind.ParenthesizedArrowFunctionExpression:
+                    // case SyntaxKind.ConstructorDeclaration:
+                    // case SyntaxKind.SimpleArrowFunctionExpression:
+                    // case SyntaxKind.ParenthesizedArrowFunctionExpression:
                     case 222 /* InterfaceDeclaration */:
                         return true;
                 }
@@ -48254,6 +48436,7 @@ var ts;
     })(formatting = ts.formatting || (ts.formatting = {}));
 })(ts || (ts = {}));
 ///<reference path='references.ts' />
+/* tslint:disable:no-null-keyword */
 /* @internal */
 var ts;
 (function (ts) {
@@ -48271,9 +48454,9 @@ var ts;
             };
             RulesMap.prototype.Initialize = function (rules) {
                 this.mapRowLength = 138 /* LastToken */ + 1;
-                this.map = new Array(this.mapRowLength * this.mapRowLength); //new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
+                this.map = new Array(this.mapRowLength * this.mapRowLength); // new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
                 // This array is used only during construction of the rulesbucket in the map
-                var rulesBucketConstructionStateList = new Array(this.map.length); //new Array<RulesBucketConstructionState>(this.map.length);
+                var rulesBucketConstructionStateList = new Array(this.map.length); // new Array<RulesBucketConstructionState>(this.map.length);
                 this.FillRules(rules, rulesBucketConstructionStateList);
                 return this.map;
             };
@@ -48285,7 +48468,7 @@ var ts;
             };
             RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
                 var rulesBucketIndex = (row * this.mapRowLength) + column;
-                //Debug.Assert(rulesBucketIndex < this.map.Length, "Trying to access an index outside the array.");
+                // Debug.Assert(rulesBucketIndex < this.map.Length, "Trying to access an index outside the array.");
                 return rulesBucketIndex;
             };
             RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
@@ -48537,6 +48720,7 @@ var ts;
 ///<reference path='rulesMap.ts' />
 ///<reference path='tokenRange.ts' /> 
 /// <reference path="references.ts"/>
+/* tslint:disable:no-null-keyword */
 /* @internal */
 var ts;
 (function (ts) {
@@ -49058,7 +49242,7 @@ var ts;
                 // if there are any tokens that logically belong to node and interleave child nodes
                 // such tokens will be consumed in processChildNode for for the child that follows them
                 ts.forEachChild(node, function (child) {
-                    processChildNode(child, /*inheritedIndentation*/ -1 /* Unknown */, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListElement*/ false);
+                    processChildNode(child, /*inheritedIndentation*/ -1 /* Unknown */, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListItem*/ false);
                 }, function (nodes) {
                     processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
                 });
@@ -49149,7 +49333,7 @@ var ts;
                     var inheritedIndentation = -1 /* Unknown */;
                     for (var i = 0; i < nodes.length; i++) {
                         var child = nodes[i];
-                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListElement*/ true, /*isFirstListItem*/ i === 0);
+                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListItem*/ true, /*isFirstListItem*/ i === 0);
                     }
                     if (listEndToken !== 0 /* Unknown */) {
                         if (formattingScanner.isOnToken()) {
@@ -49279,7 +49463,7 @@ var ts;
                         // Handle the case where the next line is moved to be the end of this line.
                         // In this case we don't indent the next line in the next pass.
                         if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(/*lineAdded*/ false);
+                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ false);
                         }
                     }
                     else if (rule.Operation.Action & 4 /* NewLine */ && currentStartLine === previousStartLine) {
@@ -49288,7 +49472,7 @@ var ts;
                         // In this case we indent token2 in the next pass but we set
                         // sameLineIndent flag to notify the indenter that the indentation is within the line.
                         if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(/*lineAdded*/ true);
+                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ true);
                         }
                     }
                     // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
@@ -49336,7 +49520,7 @@ var ts;
                 else {
                     parts = [];
                     var startPos = commentRange.pos;
-                    for (var line = startLine; line < endLine; ++line) {
+                    for (var line = startLine; line < endLine; line++) {
                         var endOfLine = ts.getEndLinePosition(line, sourceFile);
                         parts.push({ pos: startPos, end: endOfLine });
                         startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
@@ -49355,7 +49539,7 @@ var ts;
                 }
                 // shift all parts on the delta size
                 var delta = indentation - nonWhitespaceColumnInFirstPart.column;
-                for (var i = startIndex, len = parts.length; i < len; ++i, ++startLine) {
+                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
                     var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
                     var nonWhitespaceCharacterAndColumn = i === 0
                         ? nonWhitespaceColumnInFirstPart
@@ -49371,7 +49555,7 @@ var ts;
                 }
             }
             function trimTrailingWhitespacesForLines(line1, line2, range) {
-                for (var line = line1; line < line2; ++line) {
+                for (var line = line1; line < line2; line++) {
                     var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
                     var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
                     // do not trim whitespaces in comments or template expression
@@ -49422,7 +49606,6 @@ var ts;
                 }
             }
             function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
-                var between;
                 switch (rule.Operation.Action) {
                     case 1 /* Ignore */:
                         // no action required
@@ -49459,14 +49642,6 @@ var ts;
                 }
             }
         }
-        function isSomeBlock(kind) {
-            switch (kind) {
-                case 199 /* Block */:
-                case 226 /* ModuleBlock */:
-                    return true;
-            }
-            return false;
-        }
         function getOpenTokenForList(node, list) {
             switch (node.kind) {
                 case 148 /* Constructor */:
@@ -49525,7 +49700,7 @@ var ts;
                     internedTabsIndentation = [];
                 }
                 if (internedTabsIndentation[tabs] === undefined) {
-                    internedTabsIndentation[tabs] = tabString = repeat('\t', tabs);
+                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
                 }
                 else {
                     tabString = internedTabsIndentation[tabs];
@@ -49550,7 +49725,7 @@ var ts;
             }
             function repeat(value, count) {
                 var s = "";
-                for (var i = 0; i < count; ++i) {
+                for (var i = 0; i < count; i++) {
                     s += value;
                 }
                 return s;
@@ -49866,7 +50041,7 @@ var ts;
                 // walk toward the start of the list starting from current node and check if the line is the same for all items.
                 // if end line for item [i - 1] differs from the start line for item [i] - find column of the first non-whitespace character on the line of item [i]
                 var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
-                for (var i = index - 1; i >= 0; --i) {
+                for (var i = index - 1; i >= 0; i--) {
                     if (list[i].kind === 24 /* CommaToken */) {
                         continue;
                     }
@@ -49893,7 +50068,7 @@ var ts;
             function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
                 var character = 0;
                 var column = 0;
-                for (var pos = startPos; pos < endPos; ++pos) {
+                for (var pos = startPos; pos < endPos; pos++) {
                     var ch = sourceFile.text.charCodeAt(pos);
                     if (!ts.isWhiteSpace(ch)) {
                         break;
@@ -49987,7 +50162,7 @@ var ts;
             Function returns true when the parent node should indent the given child by an explicit rule
             */
             function shouldIndentChildNode(parent, child) {
-                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, false);
+                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, /*indentByDefault*/ false);
             }
             SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
         })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
@@ -50809,49 +50984,55 @@ var ts;
     (function (ScriptElementKind) {
         ScriptElementKind.unknown = "";
         ScriptElementKind.warning = "warning";
-        // predefined type (void) or keyword (class)
+        /** predefined type (void) or keyword (class) */
         ScriptElementKind.keyword = "keyword";
-        // top level script node
+        /** top level script node */
         ScriptElementKind.scriptElement = "script";
-        // module foo {}
+        /** module foo {} */
         ScriptElementKind.moduleElement = "module";
-        // class X {}
+        /** class X {} */
         ScriptElementKind.classElement = "class";
-        // var x = class X {}
+        /** var x = class X {} */
         ScriptElementKind.localClassElement = "local class";
-        // interface Y {}
+        /** interface Y {} */
         ScriptElementKind.interfaceElement = "interface";
-        // type T = ...
+        /** type T = ... */
         ScriptElementKind.typeElement = "type";
-        // enum E
+        /** enum E */
         ScriptElementKind.enumElement = "enum";
-        // Inside module and script only
-        // const v = ..
+        /**
+         * Inside module and script only
+         * const v = ..
+         */
         ScriptElementKind.variableElement = "var";
-        // Inside function
+        /** Inside function */
         ScriptElementKind.localVariableElement = "local var";
-        // Inside module and script only
-        // function f() { }
+        /**
+         * Inside module and script only
+         * function f() { }
+         */
         ScriptElementKind.functionElement = "function";
-        // Inside function
+        /** Inside function */
         ScriptElementKind.localFunctionElement = "local function";
-        // class X { [public|private]* foo() {} }
+        /** class X { [public|private]* foo() {} } */
         ScriptElementKind.memberFunctionElement = "method";
-        // class X { [public|private]* [get|set] foo:number; }
+        /** class X { [public|private]* [get|set] foo:number; } */
         ScriptElementKind.memberGetAccessorElement = "getter";
         ScriptElementKind.memberSetAccessorElement = "setter";
-        // class X { [public|private]* foo:number; }
-        // interface Y { foo:number; }
+        /**
+         * class X { [public|private]* foo:number; }
+         * interface Y { foo:number; }
+         */
         ScriptElementKind.memberVariableElement = "property";
-        // class X { constructor() { } }
+        /** class X { constructor() { } } */
         ScriptElementKind.constructorImplementationElement = "constructor";
-        // interface Y { ():number; }
+        /** interface Y { ():number; } */
         ScriptElementKind.callSignatureElement = "call";
-        // interface Y { []:number; }
+        /** interface Y { []:number; } */
         ScriptElementKind.indexSignatureElement = "index";
-        // interface Y { new():Y; }
+        /** interface Y { new():Y; } */
         ScriptElementKind.constructSignatureElement = "construct";
-        // function foo(*Y*: string)
+        /** function foo(*Y*: string) */
         ScriptElementKind.parameterElement = "parameter";
         ScriptElementKind.typeParameterElement = "type parameter";
         ScriptElementKind.primitiveType = "primitive type";
@@ -52236,9 +52417,9 @@ var ts;
             // Check if the caret is at the end of an identifier; this is a partial identifier that we want to complete: e.g. a.toS|
             // Skip this partial identifier and adjust the contextToken to the token that precedes it.
             if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
-                var start_6 = new Date().getTime();
+                var start_5 = new Date().getTime();
                 contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
-                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_6));
+                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_5));
             }
             // Find the node where completion is requested on.
             // Also determine whether we are trying to complete with members of that node
@@ -52518,13 +52699,13 @@ var ts;
                     || contextToken.kind === 166 /* StringLiteralType */
                     || contextToken.kind === 10 /* RegularExpressionLiteral */
                     || ts.isTemplateLiteralKind(contextToken.kind)) {
-                    var start_7 = contextToken.getStart();
+                    var start_6 = contextToken.getStart();
                     var end = contextToken.getEnd();
                     // To be "in" one of these literals, the position has to be:
                     //   1. entirely within the token text.
                     //   2. at the end position of an unterminated token.
                     //   3. at the end of a regular expression (due to trailing flags like '/foo/g').
-                    if (start_7 < position && position < end) {
+                    if (start_6 < position && position < end) {
                         return true;
                     }
                     if (position === end) {
@@ -53759,8 +53940,7 @@ var ts;
         }
         function getDocumentHighlights(fileName, position, filesToSearch) {
             synchronizeHostData();
-            filesToSearch = ts.map(filesToSearch, ts.normalizeSlashes);
-            var sourceFilesToSearch = ts.filter(program.getSourceFiles(), function (f) { return ts.contains(filesToSearch, f.fileName); });
+            var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
             var sourceFile = getValidSourceFile(fileName);
             var node = ts.getTouchingWord(sourceFile, position);
             if (!node) {
@@ -55150,7 +55330,8 @@ var ts;
         /// NavigateTo
         function getNavigateToItems(searchValue, maxResultCount) {
             synchronizeHostData();
-            return ts.NavigateTo.getNavigateToItems(program, cancellationToken, searchValue, maxResultCount);
+            var checker = getProgram().getTypeChecker();
+            return ts.NavigateTo.getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount);
         }
         function getEmitOutput(fileName) {
             synchronizeHostData();
@@ -57559,6 +57740,9 @@ var ts;
         LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
             return this.shimHost.getCurrentDirectory();
         };
+        LanguageServiceShimHostAdapter.prototype.getDirectories = function (path) {
+            return this.shimHost.getDirectories(path);
+        };
         LanguageServiceShimHostAdapter.prototype.getDefaultLibFileName = function (options) {
             return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
         };

From b3531b01584d5ff47278f1569ff449cf3a472c72 Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Wed, 25 May 2016 12:25:53 -0700
Subject: [PATCH 095/332] add a extra check to avoid rescans

---
 scripts/tslint/booleanTriviaRule.ts | 2 +-
 src/services/utilities.ts           | 3 +++
 2 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/scripts/tslint/booleanTriviaRule.ts b/scripts/tslint/booleanTriviaRule.ts
index 756728a1a11..b626b7560a6 100644
--- a/scripts/tslint/booleanTriviaRule.ts
+++ b/scripts/tslint/booleanTriviaRule.ts
@@ -18,7 +18,7 @@ class BooleanTriviaWalker extends Lint.RuleWalker {
 
     visitCallExpression(node: ts.CallExpression) {
         super.visitCallExpression(node);
-        if (node.arguments) {
+        if (node.arguments && node.arguments.some(arg => arg.kind === ts.SyntaxKind.TrueKeyword || arg.kind === ts.SyntaxKind.FalseKeyword)) {
             const targetCallSignature = this.checker.getResolvedSignature(node);
             if (!!targetCallSignature) {
                 const targetParameters = targetCallSignature.getParameters();
diff --git a/src/services/utilities.ts b/src/services/utilities.ts
index 34ae39c02d4..f4617395c43 100644
--- a/src/services/utilities.ts
+++ b/src/services/utilities.ts
@@ -267,6 +267,9 @@ namespace ts {
             // find the child that contains 'position'
             for (let i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
                 const child = current.getChildAt(i);
+                if (position < child.getFullStart() || position > child.getEnd()) {
+                    continue;
+                }
                 const start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile);
                 if (start <= position) {
                     const end = child.getEnd();

From 1e41af30fee7fbdb1b7e2bb1130ae183abd0a7ab Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Wed, 25 May 2016 12:27:29 -0700
Subject: [PATCH 096/332] Update LKG

---
 lib/tsc.js                | 2 +-
 lib/tsserver.js           | 2 +-
 lib/tsserverlibrary.js    | 2 +-
 lib/typescript.js         | 9 ++++-----
 lib/typescriptServices.js | 9 ++++-----
 5 files changed, 11 insertions(+), 13 deletions(-)

diff --git a/lib/tsc.js b/lib/tsc.js
index 00c758c0446..ca303c49f7b 100644
--- a/lib/tsc.js
+++ b/lib/tsc.js
@@ -18090,7 +18090,7 @@ var ts;
                             inferFromTypes(source, t);
                         }
                     }
-                    if (target.flags & 16384 && typeParameterCount === 1) {
+                    if (typeParameterCount === 1) {
                         inferiority++;
                         inferFromTypes(source, typeParameter);
                         inferiority--;
diff --git a/lib/tsserver.js b/lib/tsserver.js
index 7eb744a77d3..dcf76693225 100644
--- a/lib/tsserver.js
+++ b/lib/tsserver.js
@@ -18854,7 +18854,7 @@ var ts;
                             inferFromTypes(source, t);
                         }
                     }
-                    if (target.flags & 16384 && typeParameterCount === 1) {
+                    if (typeParameterCount === 1) {
                         inferiority++;
                         inferFromTypes(source, typeParameter);
                         inferiority--;
diff --git a/lib/tsserverlibrary.js b/lib/tsserverlibrary.js
index 902bfcf610e..f16d02e472c 100644
--- a/lib/tsserverlibrary.js
+++ b/lib/tsserverlibrary.js
@@ -18854,7 +18854,7 @@ var ts;
                             inferFromTypes(source, t);
                         }
                     }
-                    if (target.flags & 16384 && typeParameterCount === 1) {
+                    if (typeParameterCount === 1) {
                         inferiority++;
                         inferFromTypes(source, typeParameter);
                         inferiority--;
diff --git a/lib/typescript.js b/lib/typescript.js
index 19fffd35501..cf982a3ede9 100644
--- a/lib/typescript.js
+++ b/lib/typescript.js
@@ -21958,11 +21958,10 @@ var ts;
                             inferFromTypes(source, t);
                         }
                     }
-                    // Next, if target is a union type containing a single naked type parameter, make a
-                    // secondary inference to that type parameter. We don't do this for intersection types
-                    // because in a target type like Foo & T we don't know how which parts of the source type
-                    // should be matched by Foo and which should be inferred to T.
-                    if (target.flags & 16384 /* Union */ && typeParameterCount === 1) {
+                    // Next, if target containings a single naked type parameter, make a secondary inference to that type
+                    // parameter. This gives meaningful results for union types in co-variant positions and intersection
+                    // types in contra-variant positions (such as callback parameters).
+                    if (typeParameterCount === 1) {
                         inferiority++;
                         inferFromTypes(source, typeParameter);
                         inferiority--;
diff --git a/lib/typescriptServices.js b/lib/typescriptServices.js
index 19fffd35501..cf982a3ede9 100644
--- a/lib/typescriptServices.js
+++ b/lib/typescriptServices.js
@@ -21958,11 +21958,10 @@ var ts;
                             inferFromTypes(source, t);
                         }
                     }
-                    // Next, if target is a union type containing a single naked type parameter, make a
-                    // secondary inference to that type parameter. We don't do this for intersection types
-                    // because in a target type like Foo & T we don't know how which parts of the source type
-                    // should be matched by Foo and which should be inferred to T.
-                    if (target.flags & 16384 /* Union */ && typeParameterCount === 1) {
+                    // Next, if target containings a single naked type parameter, make a secondary inference to that type
+                    // parameter. This gives meaningful results for union types in co-variant positions and intersection
+                    // types in contra-variant positions (such as callback parameters).
+                    if (typeParameterCount === 1) {
                         inferiority++;
                         inferFromTypes(source, typeParameter);
                         inferiority--;

From 7ddb1631bc923c79d6c3f1b6bd10797f6aeac6be Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 25 May 2016 13:38:53 -0700
Subject: [PATCH 097/332] Remove many uses of 'null' in harness. Remaining uses
 should be commented.

---
 src/harness/compilerRunner.ts         |  1 +
 src/harness/external/chai.d.ts        |  3 +-
 src/harness/fourslash.ts              | 43 +++++++++++++--------------
 src/harness/fourslashRunner.ts        |  1 -
 src/harness/harness.ts                | 39 ++++++++++++------------
 src/harness/harnessLanguageService.ts |  2 +-
 src/harness/loggedIO.ts               |  6 ++--
 src/harness/projectsRunner.ts         |  3 +-
 src/harness/runner.ts                 |  2 --
 src/harness/rwcRunner.ts              |  5 ++--
 src/harness/test262Runner.ts          |  1 +
 11 files changed, 51 insertions(+), 55 deletions(-)

diff --git a/src/harness/compilerRunner.ts b/src/harness/compilerRunner.ts
index d368293bd65..1a83f8c4582 100644
--- a/src/harness/compilerRunner.ts
+++ b/src/harness/compilerRunner.ts
@@ -1,6 +1,7 @@
 /// <reference path="harness.ts" />
 /// <reference path="runnerbase.ts" />
 /// <reference path="typeWriter.ts" />
+// In harness baselines, null is different than undefined. See `generateActual` in `harness.ts`.
 /* tslint:disable:no-null-keyword */
 
 const enum CompilerTestType {
diff --git a/src/harness/external/chai.d.ts b/src/harness/external/chai.d.ts
index 814de75e7b2..59cf2834b27 100644
--- a/src/harness/external/chai.d.ts
+++ b/src/harness/external/chai.d.ts
@@ -169,7 +169,6 @@ declare module chai {
         function notEqual(actual: any, expected: any, message?: string): void;
         function isTrue(value: any, message?: string): void;
         function isFalse(value: any, message?: string): void;
-        function isNull(value: any, message?: string): void;
-        function isNotNull(value: any, message?: string): void;
+        function isOk(actual: any, message?: string): void;
     }
 }
\ No newline at end of file
diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index 4fd3161d1dc..0f11d12097d 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -18,7 +18,6 @@
 /// <reference path="harnessLanguageService.ts" />
 /// <reference path="harness.ts" />
 /// <reference path="fourslashRunner.ts" />
-/* tslint:disable:no-null-keyword */
 
 namespace FourSlash {
     ts.disableIncrementalParsing = false;
@@ -198,7 +197,7 @@ namespace FourSlash {
         public lastKnownMarker: string = "";
 
         // The file that's currently 'opened'
-        public activeFile: FourSlashFile = null;
+        public activeFile: FourSlashFile;
 
         // Whether or not we should format on keystrokes
         public enableFormatting = true;
@@ -922,7 +921,7 @@ namespace FourSlash {
 
         public verifyCurrentParameterIsletiable(isVariable: boolean) {
             const signature = this.getActiveSignatureHelpItem();
-            assert.isNotNull(signature);
+            assert.isOk(signature);
             assert.equal(isVariable, signature.isVariadic);
         }
 
@@ -1911,7 +1910,7 @@ namespace FourSlash {
         public verifyNavigationItemsCount(expected: number, searchValue: string, matchKind?: string) {
             const items = this.languageService.getNavigateToItems(searchValue);
             let actual = 0;
-            let item: ts.NavigateToItem = null;
+            let item: ts.NavigateToItem;
 
             // Count only the match that match the same MatchKind
             for (let i = 0; i < items.length; i++) {
@@ -2183,7 +2182,7 @@ namespace FourSlash {
         }
 
         private findFile(indexOrName: any) {
-            let result: FourSlashFile = null;
+            let result: FourSlashFile;
             if (typeof indexOrName === "number") {
                 const index = <number>indexOrName;
                 if (index >= this.testData.files.length) {
@@ -2352,9 +2351,15 @@ ${code}
         const ranges: Range[] = [];
 
         // Stuff related to the subfile we're parsing
-        let currentFileContent: string = null;
+        let currentFileContent: string = undefined;
         let currentFileName = fileName;
         let currentFileOptions: { [s: string]: string } = {};
+        
+        function resetLocalData() {
+            currentFileContent = undefined;
+            currentFileOptions = {};
+            currentFileName = fileName;
+        }
 
         for (let i = 0; i < lines.length; i++) {
             let line = lines[i];
@@ -2368,7 +2373,7 @@ ${code}
                 // Subfile content line
 
                 // Append to the current subfile content, inserting a newline needed
-                if (currentFileContent === null) {
+                if (currentFileContent === undefined) {
                     currentFileContent = "";
                 }
                 else {
@@ -2400,10 +2405,7 @@ ${code}
                                 // Store result file
                                 files.push(file);
 
-                                // Reset local data
-                                currentFileContent = null;
-                                currentFileOptions = {};
-                                currentFileName = fileName;
+                                resetLocalData();
                             }
 
                             currentFileName = basePath + "/" + match[2];
@@ -2430,10 +2432,7 @@ ${code}
                     // Store result file
                     files.push(file);
 
-                    // Reset local data
-                    currentFileContent = null;
-                    currentFileOptions = {};
-                    currentFileName = fileName;
+                    resetLocalData();
                 }
             }
         }
@@ -2498,7 +2497,7 @@ ${code}
 
         if (markerValue === undefined) {
             reportError(fileName, location.sourceLine, location.sourceColumn, "Object markers can not be empty");
-            return null;
+            return undefined;
         }
 
         const marker: Marker = {
@@ -2527,7 +2526,7 @@ ${code}
         if (markerMap[name] !== undefined) {
             const message = "Marker '" + name + "' is duplicated in the source file contents.";
             reportError(marker.fileName, location.sourceLine, location.sourceColumn, message);
-            return null;
+            return undefined;
         }
         else {
             markerMap[name] = marker;
@@ -2546,7 +2545,7 @@ ${code}
         let output = "";
 
         /// The current marker (or maybe multi-line comment?) we're parsing, possibly
-        let openMarker: LocationInformation = null;
+        let openMarker: LocationInformation = undefined;
 
         /// A stack of the open range markers that are still unclosed
         const openRanges: RangeLocationInformation[] = [];
@@ -2654,7 +2653,7 @@ ${code}
                             difference += i + 1 - openMarker.sourcePosition;
 
                             // Reset the state
-                            openMarker = null;
+                            openMarker = undefined;
                             state = State.none;
                         }
                         break;
@@ -2676,7 +2675,7 @@ ${code}
                             difference += i + 1 - openMarker.sourcePosition;
 
                             // Reset the state
-                            openMarker = null;
+                            openMarker = undefined;
                             state = State.none;
                         }
                         else if (validMarkerChars.indexOf(currentChar) < 0) {
@@ -2688,7 +2687,7 @@ ${code}
                                 // Bail out the text we've gathered so far back into the output
                                 flush(i);
                                 lastNormalCharPosition = i;
-                                openMarker = null;
+                                openMarker = undefined;
 
                                 state = State.none;
                             }
@@ -2719,7 +2718,7 @@ ${code}
             reportError(fileName, openRange.sourceLine, openRange.sourceColumn, "Unterminated range.");
         }
 
-        if (openMarker !== null) {
+        if (openMarker) {
             reportError(fileName, openMarker.sourceLine, openMarker.sourceColumn, "Unterminated marker.");
         }
 
diff --git a/src/harness/fourslashRunner.ts b/src/harness/fourslashRunner.ts
index 386bd9e340c..0047e851fc1 100644
--- a/src/harness/fourslashRunner.ts
+++ b/src/harness/fourslashRunner.ts
@@ -1,7 +1,6 @@
 ///<reference path="fourslash.ts" />
 ///<reference path="harness.ts"/>
 ///<reference path="runnerbase.ts" />
-/* tslint:disable:no-null-keyword */
 
 const enum FourSlashTestType {
     Native,
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index 5b26829cf4a..d6959c2a54f 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -23,7 +23,6 @@
 /// <reference path="external\chai.d.ts"/>
 /// <reference path="sourceMapRecorder.ts"/>
 /// <reference path="runnerbase.ts"/>
-/* tslint:disable:no-null-keyword */
 
 // Block scoped definitions work poorly for global variables, temporarily enable var
 /* tslint:disable:no-var-keyword */
@@ -32,7 +31,7 @@
 var _chai: typeof chai = require("chai");
 var assert: typeof _chai.assert = _chai.assert;
 declare var __dirname: string; // Node-specific
-var global = <any>Function("return this").call(null);
+var global = <any>Function("return this").call(undefined);
 /* tslint:enable:no-var-keyword */
 
 namespace Utils {
@@ -558,15 +557,9 @@ namespace Harness {
             }
 
             export function directoryName(path: string) {
-                let dirPath = pathModule.dirname(path);
-
+                const dirPath = pathModule.dirname(path);
                 // Node will just continue to repeat the root path, rather than return null
-                if (dirPath === path) {
-                    dirPath = null;
-                }
-                else {
-                    return dirPath;
-                }
+                return dirPath === path ? undefined : dirPath;
             }
 
             export let listFiles: typeof IO.listFiles = (path, spec?, options?) => {
@@ -634,7 +627,7 @@ namespace Harness {
                         xhr.send();
                     }
                     catch (e) {
-                        return { status: 404, responseText: null };
+                        return { status: 404, responseText: undefined };
                     }
 
                     return waitForXHR(xhr);
@@ -651,7 +644,7 @@ namespace Harness {
                     }
                     catch (e) {
                         log(`XHR Error: ${e}`);
-                        return { status: 500, responseText: null };
+                        return { status: 500, responseText: undefined };
                     }
 
                     return waitForXHR(xhr);
@@ -663,7 +656,7 @@ namespace Harness {
             }
 
             export function deleteFile(path: string) {
-                Http.writeToServerSync(serverRoot + path, "DELETE", null);
+                Http.writeToServerSync(serverRoot + path, "DELETE");
             }
 
             export function directoryExists(path: string): boolean {
@@ -674,7 +667,7 @@ namespace Harness {
                 let dirPath = path;
                 // root of the server
                 if (dirPath.match(/localhost:\d+$/) || dirPath.match(/localhost:\d+\/$/)) {
-                    dirPath = null;
+                    dirPath = undefined;
                     // path + fileName
                 }
                 else if (dirPath.indexOf(".") === -1) {
@@ -722,7 +715,7 @@ namespace Harness {
                     return response.responseText;
                 }
                 else {
-                    return null;
+                    return undefined;
                 }
             }
 
@@ -1418,7 +1411,9 @@ namespace Harness {
             const opts: CompilerSettings = {};
 
             let match: RegExpExecArray;
-            while ((match = optionRegex.exec(content)) != null) {
+            /* tslint:disable:no-null-keyword */
+            while ((match = optionRegex.exec(content)) !== null) {
+            /* tslint:enable:no-null-keyword */
                 opts[match[1]] = match[2];
             }
 
@@ -1435,9 +1430,9 @@ namespace Harness {
             const lines = Utils.splitContentByNewlines(code);
 
             // Stuff related to the subfile we're parsing
-            let currentFileContent: string = null;
+            let currentFileContent: string = undefined;
             let currentFileOptions: any = {};
-            let currentFileName: any = null;
+            let currentFileName: any = undefined;
             let refs: string[] = [];
 
             for (let i = 0; i < lines.length; i++) {
@@ -1465,7 +1460,7 @@ namespace Harness {
                         testUnitData.push(newTestFile);
 
                         // Reset local data
-                        currentFileContent = null;
+                        currentFileContent = undefined;
                         currentFileOptions = {};
                         currentFileName = testMetaData[2];
                         refs = [];
@@ -1478,7 +1473,7 @@ namespace Harness {
                 else {
                     // Subfile content line
                     // Append to the current subfile content, inserting a newline needed
-                    if (currentFileContent === null) {
+                    if (currentFileContent === undefined) {
                         currentFileContent = "";
                     }
                     else {
@@ -1601,7 +1596,9 @@ namespace Harness {
 
             // Store the content in the 'local' folder so we
             // can accept it later (manually)
+            /* tslint:disable:no-null-keyword */
             if (actual !== null) {
+            /* tslint:enable:no-null-keyword */
                 IO.writeFile(actualFileName, actual);
             }
 
@@ -1618,7 +1615,9 @@ namespace Harness {
 
             const refFileName = referencePath(relativeFileName, opts && opts.Baselinefolder, opts && opts.Subfolder);
 
+            /* tslint:disable:no-null-keyword */
             if (actual === null) {
+            /* tslint:enable:no-null-keyword */
                 actual = "<no content>";
             }
 
diff --git a/src/harness/harnessLanguageService.ts b/src/harness/harnessLanguageService.ts
index bd370b3601b..b3478e40609 100644
--- a/src/harness/harnessLanguageService.ts
+++ b/src/harness/harnessLanguageService.ts
@@ -172,7 +172,7 @@ namespace Harness.LanguageService {
           */
         public positionToLineAndCharacter(fileName: string, position: number): ts.LineAndCharacter {
             const script: ScriptInfo = this.fileNameToScript[fileName];
-            assert.isNotNull(script);
+            assert.isOk(script);
 
             return ts.computeLineAndCharacterOfPosition(script.getLineMap(), position);
         }
diff --git a/src/harness/loggedIO.ts b/src/harness/loggedIO.ts
index d468b371fbe..1c399b30a1d 100644
--- a/src/harness/loggedIO.ts
+++ b/src/harness/loggedIO.ts
@@ -1,7 +1,6 @@
 /// <reference path="..\..\src\compiler\sys.ts" />
 /// <reference path="..\..\src\harness\harness.ts" />
 /// <reference path="..\..\src\harness\runnerbase.ts" />
-/* tslint:disable:no-null-keyword */
 
 interface FileInformation {
     contents: string;
@@ -94,7 +93,7 @@ namespace Playback {
             return lookup[s] = func(s);
         });
         run.reset = () => {
-            lookup = null;
+            lookup = undefined;
         };
 
         return run;
@@ -170,7 +169,8 @@ namespace Playback {
             path => callAndRecord(underlying.fileExists(path), recordLog.fileExists, { path }),
             memoize(path => {
                 // If we read from the file, it must exist
-                if (findResultByPath(wrapper, replayLog.filesRead, path, null) !== null) {
+                const noResult = {};
+                if (findResultByPath(wrapper, replayLog.filesRead, path, noResult) !== noResult) {
                     return true;
                 }
                 else {
diff --git a/src/harness/projectsRunner.ts b/src/harness/projectsRunner.ts
index 9ee4359d8d3..d4e91d43efe 100644
--- a/src/harness/projectsRunner.ts
+++ b/src/harness/projectsRunner.ts
@@ -1,6 +1,5 @@
 ///<reference path="harness.ts" />
 ///<reference path="runnerbase.ts" />
-/* tslint:disable:no-null-keyword */
 
 // Test case is json of below type in tests/cases/project/
 interface ProjectRunnerTestCase {
@@ -53,7 +52,7 @@ class ProjectRunner extends RunnerBase {
     private runProjectTestCase(testCaseFileName: string) {
         let testCase: ProjectRunnerTestCase & ts.CompilerOptions;
 
-        let testFileText: string = null;
+        let testFileText: string;
         try {
             testFileText = Harness.IO.readFile(testCaseFileName);
         }
diff --git a/src/harness/runner.ts b/src/harness/runner.ts
index bb3cafea0a8..b56959d7e5d 100644
--- a/src/harness/runner.ts
+++ b/src/harness/runner.ts
@@ -20,8 +20,6 @@
 /// <reference path="rwcRunner.ts" />
 /// <reference path="harness.ts" />
 
-/* tslint:disable:no-null-keyword */
-
 let runners: RunnerBase[] = [];
 let iterations = 1;
 
diff --git a/src/harness/rwcRunner.ts b/src/harness/rwcRunner.ts
index 39231435bf5..99b1ce8cc88 100644
--- a/src/harness/rwcRunner.ts
+++ b/src/harness/rwcRunner.ts
@@ -2,6 +2,7 @@
 /// <reference path="runnerbase.ts" />
 /// <reference path="loggedIO.ts" />
 /// <reference path="..\compiler\commandLineParser.ts"/>
+// In harness baselines, null is different than undefined. See `generateActual` in `harness.ts`.
 /* tslint:disable:no-null-keyword */
 
 namespace RWC {
@@ -123,7 +124,7 @@ namespace RWC {
                     opts.options.noLib = true;
 
                     // Emit the results
-                    compilerOptions = null;
+                    compilerOptions = undefined;
                     const output = Harness.Compiler.compileFiles(
                         inputFiles,
                         otherFiles,
@@ -139,7 +140,7 @@ namespace RWC {
 
                 function getHarnessCompilerInputUnit(fileName: string): Harness.Compiler.TestFile {
                     const unitName = ts.normalizeSlashes(Harness.IO.resolvePath(fileName));
-                    let content: string = null;
+                    let content: string;
                     try {
                         content = Harness.IO.readFile(unitName);
                     }
diff --git a/src/harness/test262Runner.ts b/src/harness/test262Runner.ts
index cc9957c1fac..241af5f3d00 100644
--- a/src/harness/test262Runner.ts
+++ b/src/harness/test262Runner.ts
@@ -1,5 +1,6 @@
 /// <reference path="harness.ts" />
 /// <reference path="runnerbase.ts" />
+// In harness baselines, null is different than undefined. See `generateActual` in `harness.ts`.
 /* tslint:disable:no-null-keyword */
 
 class Test262BaselineRunner extends RunnerBase {

From 6ab389174ce8b6513d8040370042c2730549b449 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Wed, 25 May 2016 16:46:20 -0700
Subject: [PATCH 098/332] Accept baselines

---
 .../assignmentCompatability10.symbols         | 46 +++++++++++++++++
 .../reference/assignmentCompatability10.types | 51 +++++++++++++++++++
 2 files changed, 97 insertions(+)
 create mode 100644 tests/baselines/reference/assignmentCompatability10.symbols
 create mode 100644 tests/baselines/reference/assignmentCompatability10.types

diff --git a/tests/baselines/reference/assignmentCompatability10.symbols b/tests/baselines/reference/assignmentCompatability10.symbols
new file mode 100644
index 00000000000..d4fdcd73241
--- /dev/null
+++ b/tests/baselines/reference/assignmentCompatability10.symbols
@@ -0,0 +1,46 @@
+=== tests/cases/compiler/assignmentCompatability10.ts ===
+module __test1__ {
+>__test1__ : Symbol(__test1__, Decl(assignmentCompatability10.ts, 0, 0))
+
+    export interface interfaceWithPublicAndOptional<T,U> { one: T; two?: U; };  var obj4: interfaceWithPublicAndOptional<number,string> = { one: 1 };;
+>interfaceWithPublicAndOptional : Symbol(interfaceWithPublicAndOptional, Decl(assignmentCompatability10.ts, 0, 18))
+>T : Symbol(T, Decl(assignmentCompatability10.ts, 1, 52))
+>U : Symbol(U, Decl(assignmentCompatability10.ts, 1, 54))
+>one : Symbol(interfaceWithPublicAndOptional.one, Decl(assignmentCompatability10.ts, 1, 58))
+>T : Symbol(T, Decl(assignmentCompatability10.ts, 1, 52))
+>two : Symbol(interfaceWithPublicAndOptional.two, Decl(assignmentCompatability10.ts, 1, 66))
+>U : Symbol(U, Decl(assignmentCompatability10.ts, 1, 54))
+>obj4 : Symbol(obj4, Decl(assignmentCompatability10.ts, 1, 83))
+>interfaceWithPublicAndOptional : Symbol(interfaceWithPublicAndOptional, Decl(assignmentCompatability10.ts, 0, 18))
+>one : Symbol(one, Decl(assignmentCompatability10.ts, 1, 139))
+
+    export var __val__obj4 = obj4;
+>__val__obj4 : Symbol(__val__obj4, Decl(assignmentCompatability10.ts, 2, 14))
+>obj4 : Symbol(obj4, Decl(assignmentCompatability10.ts, 1, 83))
+}
+module __test2__ {
+>__test2__ : Symbol(__test2__, Decl(assignmentCompatability10.ts, 3, 1))
+
+    export class classWithPublicAndOptional<T,U> { constructor(public one: T, public two?: U) {} }   var x4 = new classWithPublicAndOptional<number, string>(1);;
+>classWithPublicAndOptional : Symbol(classWithPublicAndOptional, Decl(assignmentCompatability10.ts, 4, 18))
+>T : Symbol(T, Decl(assignmentCompatability10.ts, 5, 44))
+>U : Symbol(U, Decl(assignmentCompatability10.ts, 5, 46))
+>one : Symbol(classWithPublicAndOptional.one, Decl(assignmentCompatability10.ts, 5, 63))
+>T : Symbol(T, Decl(assignmentCompatability10.ts, 5, 44))
+>two : Symbol(classWithPublicAndOptional.two, Decl(assignmentCompatability10.ts, 5, 77))
+>U : Symbol(U, Decl(assignmentCompatability10.ts, 5, 46))
+>x4 : Symbol(x4, Decl(assignmentCompatability10.ts, 5, 104))
+>classWithPublicAndOptional : Symbol(classWithPublicAndOptional, Decl(assignmentCompatability10.ts, 4, 18))
+
+    export var __val__x4 = x4;
+>__val__x4 : Symbol(__val__x4, Decl(assignmentCompatability10.ts, 6, 14))
+>x4 : Symbol(x4, Decl(assignmentCompatability10.ts, 5, 104))
+}
+__test2__.__val__x4 = __test1__.__val__obj4
+>__test2__.__val__x4 : Symbol(__test2__.__val__x4, Decl(assignmentCompatability10.ts, 6, 14))
+>__test2__ : Symbol(__test2__, Decl(assignmentCompatability10.ts, 3, 1))
+>__val__x4 : Symbol(__test2__.__val__x4, Decl(assignmentCompatability10.ts, 6, 14))
+>__test1__.__val__obj4 : Symbol(__test1__.__val__obj4, Decl(assignmentCompatability10.ts, 2, 14))
+>__test1__ : Symbol(__test1__, Decl(assignmentCompatability10.ts, 0, 0))
+>__val__obj4 : Symbol(__test1__.__val__obj4, Decl(assignmentCompatability10.ts, 2, 14))
+
diff --git a/tests/baselines/reference/assignmentCompatability10.types b/tests/baselines/reference/assignmentCompatability10.types
new file mode 100644
index 00000000000..f4c2bba451d
--- /dev/null
+++ b/tests/baselines/reference/assignmentCompatability10.types
@@ -0,0 +1,51 @@
+=== tests/cases/compiler/assignmentCompatability10.ts ===
+module __test1__ {
+>__test1__ : typeof __test1__
+
+    export interface interfaceWithPublicAndOptional<T,U> { one: T; two?: U; };  var obj4: interfaceWithPublicAndOptional<number,string> = { one: 1 };;
+>interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
+>T : T
+>U : U
+>one : T
+>T : T
+>two : U
+>U : U
+>obj4 : interfaceWithPublicAndOptional<number, string>
+>interfaceWithPublicAndOptional : interfaceWithPublicAndOptional<T, U>
+>{ one: 1 } : { one: number; }
+>one : number
+>1 : number
+
+    export var __val__obj4 = obj4;
+>__val__obj4 : interfaceWithPublicAndOptional<number, string>
+>obj4 : interfaceWithPublicAndOptional<number, string>
+}
+module __test2__ {
+>__test2__ : typeof __test2__
+
+    export class classWithPublicAndOptional<T,U> { constructor(public one: T, public two?: U) {} }   var x4 = new classWithPublicAndOptional<number, string>(1);;
+>classWithPublicAndOptional : classWithPublicAndOptional<T, U>
+>T : T
+>U : U
+>one : T
+>T : T
+>two : U
+>U : U
+>x4 : classWithPublicAndOptional<number, string>
+>new classWithPublicAndOptional<number, string>(1) : classWithPublicAndOptional<number, string>
+>classWithPublicAndOptional : typeof classWithPublicAndOptional
+>1 : number
+
+    export var __val__x4 = x4;
+>__val__x4 : classWithPublicAndOptional<number, string>
+>x4 : classWithPublicAndOptional<number, string>
+}
+__test2__.__val__x4 = __test1__.__val__obj4
+>__test2__.__val__x4 = __test1__.__val__obj4 : __test1__.interfaceWithPublicAndOptional<number, string>
+>__test2__.__val__x4 : __test2__.classWithPublicAndOptional<number, string>
+>__test2__ : typeof __test2__
+>__val__x4 : __test2__.classWithPublicAndOptional<number, string>
+>__test1__.__val__obj4 : __test1__.interfaceWithPublicAndOptional<number, string>
+>__test1__ : typeof __test1__
+>__val__obj4 : __test1__.interfaceWithPublicAndOptional<number, string>
+

From 42c17e194e77e4e5f32eacef1784d1407df41fe2 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Wed, 25 May 2016 17:03:33 -0700
Subject: [PATCH 099/332] Address PR comments

---
 src/compiler/checker.ts                       |  4 +-
 ...omputedPropertyNamesContextualType7_ES5.js | 13 +++++--
 ...edPropertyNamesContextualType7_ES5.symbols | 39 ++++++++++++++-----
 ...utedPropertyNamesContextualType7_ES5.types | 38 +++++++++++++-----
 ...omputedPropertyNamesContextualType7_ES6.js | 13 +++++--
 ...edPropertyNamesContextualType7_ES6.symbols | 39 ++++++++++++++-----
 ...utedPropertyNamesContextualType7_ES6.types | 38 +++++++++++++-----
 ...omputedPropertyNamesContextualType7_ES5.ts | 11 ++++--
 ...omputedPropertyNamesContextualType7_ES6.ts | 11 ++++--
 9 files changed, 151 insertions(+), 55 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 4768a357d2b..40998d9a633 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -6036,12 +6036,10 @@ namespace ts {
                     const resolved = resolveStructuredTypeMembers(type);
                     if ((relation === assignableRelation || relation === comparableRelation) && (type === globalObjectType || isEmptyObjectType(resolved)) ||
                         resolved.stringIndexInfo ||
+                        (resolved.numberIndexInfo && isNumericLiteralName(name)) ||
                         getPropertyOfType(type, name)) {
                         return true;
                     }
-                    if (resolved.numberIndexInfo) {
-                        return isNumericLiteralName(name);
-                    }
                 }
                 else if (type.flags & TypeFlags.UnionOrIntersection) {
                     for (const t of (<UnionOrIntersectionType>type).types) {
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.js b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.js
index 65cc057fa81..bc8966520f6 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.js
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.js
@@ -1,22 +1,26 @@
 //// [computedPropertyNamesContextualType7_ES5.ts]
 interface I<T> {
-    [s: number]: T;
+    [n: number]: T;
+}
+interface J<T> {
+    [s: string]: T;
 }
 
-declare function foo<T>(obj: I<T>): T
+declare function foo<T>(obj: I<T>): T;
+declare function g<T>(obj: J<T>): T;
 
 foo({
-    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
     [+"hi"]: [0]
 });
+
+g({ p: "" });
 
 
 //// [computedPropertyNamesContextualType7_ES5.js]
 foo((_a = {
-        101: "",
         0: function () { }
     },
     _a["hi" + "bye"] = true,
@@ -24,4 +28,5 @@ foo((_a = {
     _a[+"hi"] = [0],
     _a
 ));
+g({ p: "" });
 var _a;
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.symbols b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.symbols
index 562b238cdac..d6889f9912d 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.symbols
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.symbols
@@ -3,26 +3,45 @@ interface I<T> {
 >I : Symbol(I, Decl(computedPropertyNamesContextualType7_ES5.ts, 0, 0))
 >T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES5.ts, 0, 12))
 
-    [s: number]: T;
->s : Symbol(s, Decl(computedPropertyNamesContextualType7_ES5.ts, 1, 5))
+    [n: number]: T;
+>n : Symbol(n, Decl(computedPropertyNamesContextualType7_ES5.ts, 1, 5))
 >T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES5.ts, 0, 12))
 }
+interface J<T> {
+>J : Symbol(J, Decl(computedPropertyNamesContextualType7_ES5.ts, 2, 1))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES5.ts, 3, 12))
 
-declare function foo<T>(obj: I<T>): T
->foo : Symbol(foo, Decl(computedPropertyNamesContextualType7_ES5.ts, 2, 1))
->T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES5.ts, 4, 21))
->obj : Symbol(obj, Decl(computedPropertyNamesContextualType7_ES5.ts, 4, 24))
+    [s: string]: T;
+>s : Symbol(s, Decl(computedPropertyNamesContextualType7_ES5.ts, 4, 5))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES5.ts, 3, 12))
+}
+
+declare function foo<T>(obj: I<T>): T;
+>foo : Symbol(foo, Decl(computedPropertyNamesContextualType7_ES5.ts, 5, 1))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES5.ts, 7, 21))
+>obj : Symbol(obj, Decl(computedPropertyNamesContextualType7_ES5.ts, 7, 24))
 >I : Symbol(I, Decl(computedPropertyNamesContextualType7_ES5.ts, 0, 0))
->T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES5.ts, 4, 21))
->T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES5.ts, 4, 21))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES5.ts, 7, 21))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES5.ts, 7, 21))
+
+declare function g<T>(obj: J<T>): T;
+>g : Symbol(g, Decl(computedPropertyNamesContextualType7_ES5.ts, 7, 38))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES5.ts, 8, 19))
+>obj : Symbol(obj, Decl(computedPropertyNamesContextualType7_ES5.ts, 8, 22))
+>J : Symbol(J, Decl(computedPropertyNamesContextualType7_ES5.ts, 2, 1))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES5.ts, 8, 19))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES5.ts, 8, 19))
 
 foo({
->foo : Symbol(foo, Decl(computedPropertyNamesContextualType7_ES5.ts, 2, 1))
+>foo : Symbol(foo, Decl(computedPropertyNamesContextualType7_ES5.ts, 5, 1))
 
-    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
     [+"hi"]: [0]
 });
 
+g({ p: "" });
+>g : Symbol(g, Decl(computedPropertyNamesContextualType7_ES5.ts, 7, 38))
+>p : Symbol(p, Decl(computedPropertyNamesContextualType7_ES5.ts, 17, 3))
+
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.types b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.types
index 53c8f805c57..64367864881 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES5.types
@@ -3,12 +3,20 @@ interface I<T> {
 >I : I<T>
 >T : T
 
-    [s: number]: T;
->s : number
+    [n: number]: T;
+>n : number
+>T : T
+}
+interface J<T> {
+>J : J<T>
+>T : T
+
+    [s: string]: T;
+>s : string
 >T : T
 }
 
-declare function foo<T>(obj: I<T>): T
+declare function foo<T>(obj: I<T>): T;
 >foo : <T>(obj: I<T>) => T
 >T : T
 >obj : I<T>
@@ -16,13 +24,18 @@ declare function foo<T>(obj: I<T>): T
 >T : T
 >T : T
 
-foo({
->foo({    101: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]}) : string | (() => void) | number | number[]
->foo : <T>(obj: I<T>) => T
->{    101: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: string | (() => void) | boolean | number | number[]; [x: number]: string | (() => void) | number | number[]; 0: () => void; 101: string; }
+declare function g<T>(obj: J<T>): T;
+>g : <T>(obj: J<T>) => T
+>T : T
+>obj : J<T>
+>J : J<T>
+>T : T
+>T : T
 
-    101: "",
->"" : string
+foo({
+>foo({    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]}) : (() => void) | number | number[]
+>foo : <T>(obj: I<T>) => T
+>{    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: (() => void) | boolean | number | number[]; [x: number]: (() => void) | number | number[]; 0: () => void; }
 
     0: () => { },
 >() => { } : () => void
@@ -47,3 +60,10 @@ foo({
 
 });
 
+g({ p: "" });
+>g({ p: "" }) : string
+>g : <T>(obj: J<T>) => T
+>{ p: "" } : { p: string; }
+>p : string
+>"" : string
+
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.js b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.js
index 0b515dba7ca..273c15018b6 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.js
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.js
@@ -1,24 +1,29 @@
 //// [computedPropertyNamesContextualType7_ES6.ts]
 interface I<T> {
-    [s: number]: T;
+    [n: number]: T;
+}
+interface J<T> {
+    [s: string]: T;
 }
 
-declare function foo<T>(obj: I<T>): T
+declare function foo<T>(obj: I<T>): T;
+declare function g<T>(obj: J<T>): T;
 
 foo({
-    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
     [+"hi"]: [0]
 });
+
+g({ p: "" });
 
 
 //// [computedPropertyNamesContextualType7_ES6.js]
 foo({
-    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
     [+"hi"]: [0]
 });
+g({ p: "" });
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.symbols b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.symbols
index ca0c2f12a80..d04c8f913bd 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.symbols
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.symbols
@@ -3,26 +3,45 @@ interface I<T> {
 >I : Symbol(I, Decl(computedPropertyNamesContextualType7_ES6.ts, 0, 0))
 >T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES6.ts, 0, 12))
 
-    [s: number]: T;
->s : Symbol(s, Decl(computedPropertyNamesContextualType7_ES6.ts, 1, 5))
+    [n: number]: T;
+>n : Symbol(n, Decl(computedPropertyNamesContextualType7_ES6.ts, 1, 5))
 >T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES6.ts, 0, 12))
 }
+interface J<T> {
+>J : Symbol(J, Decl(computedPropertyNamesContextualType7_ES6.ts, 2, 1))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES6.ts, 3, 12))
 
-declare function foo<T>(obj: I<T>): T
->foo : Symbol(foo, Decl(computedPropertyNamesContextualType7_ES6.ts, 2, 1))
->T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES6.ts, 4, 21))
->obj : Symbol(obj, Decl(computedPropertyNamesContextualType7_ES6.ts, 4, 24))
+    [s: string]: T;
+>s : Symbol(s, Decl(computedPropertyNamesContextualType7_ES6.ts, 4, 5))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES6.ts, 3, 12))
+}
+
+declare function foo<T>(obj: I<T>): T;
+>foo : Symbol(foo, Decl(computedPropertyNamesContextualType7_ES6.ts, 5, 1))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES6.ts, 7, 21))
+>obj : Symbol(obj, Decl(computedPropertyNamesContextualType7_ES6.ts, 7, 24))
 >I : Symbol(I, Decl(computedPropertyNamesContextualType7_ES6.ts, 0, 0))
->T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES6.ts, 4, 21))
->T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES6.ts, 4, 21))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES6.ts, 7, 21))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES6.ts, 7, 21))
+
+declare function g<T>(obj: J<T>): T;
+>g : Symbol(g, Decl(computedPropertyNamesContextualType7_ES6.ts, 7, 38))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES6.ts, 8, 19))
+>obj : Symbol(obj, Decl(computedPropertyNamesContextualType7_ES6.ts, 8, 22))
+>J : Symbol(J, Decl(computedPropertyNamesContextualType7_ES6.ts, 2, 1))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES6.ts, 8, 19))
+>T : Symbol(T, Decl(computedPropertyNamesContextualType7_ES6.ts, 8, 19))
 
 foo({
->foo : Symbol(foo, Decl(computedPropertyNamesContextualType7_ES6.ts, 2, 1))
+>foo : Symbol(foo, Decl(computedPropertyNamesContextualType7_ES6.ts, 5, 1))
 
-    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
     [+"hi"]: [0]
 });
 
+g({ p: "" });
+>g : Symbol(g, Decl(computedPropertyNamesContextualType7_ES6.ts, 7, 38))
+>p : Symbol(p, Decl(computedPropertyNamesContextualType7_ES6.ts, 17, 3))
+
diff --git a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.types b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.types
index f2eefe7405e..07aeda807b0 100644
--- a/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.types
+++ b/tests/baselines/reference/computedPropertyNamesContextualType7_ES6.types
@@ -3,12 +3,20 @@ interface I<T> {
 >I : I<T>
 >T : T
 
-    [s: number]: T;
->s : number
+    [n: number]: T;
+>n : number
+>T : T
+}
+interface J<T> {
+>J : J<T>
+>T : T
+
+    [s: string]: T;
+>s : string
 >T : T
 }
 
-declare function foo<T>(obj: I<T>): T
+declare function foo<T>(obj: I<T>): T;
 >foo : <T>(obj: I<T>) => T
 >T : T
 >obj : I<T>
@@ -16,13 +24,18 @@ declare function foo<T>(obj: I<T>): T
 >T : T
 >T : T
 
-foo({
->foo({    101: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]}) : string | (() => void) | number | number[]
->foo : <T>(obj: I<T>) => T
->{    101: "",    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: string | (() => void) | boolean | number | number[]; [x: number]: string | (() => void) | number | number[]; 0: () => void; 101: string; }
+declare function g<T>(obj: J<T>): T;
+>g : <T>(obj: J<T>) => T
+>T : T
+>obj : J<T>
+>J : J<T>
+>T : T
+>T : T
 
-    101: "",
->"" : string
+foo({
+>foo({    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]}) : (() => void) | number | number[]
+>foo : <T>(obj: I<T>) => T
+>{    0: () => { },    ["hi" + "bye"]: true,    [0 + 1]: 0,    [+"hi"]: [0]} : { [x: string]: (() => void) | boolean | number | number[]; [x: number]: (() => void) | number | number[]; 0: () => void; }
 
     0: () => { },
 >() => { } : () => void
@@ -47,3 +60,10 @@ foo({
 
 });
 
+g({ p: "" });
+>g({ p: "" }) : string
+>g : <T>(obj: J<T>) => T
+>{ p: "" } : { p: string; }
+>p : string
+>"" : string
+
diff --git a/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES5.ts b/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES5.ts
index 4f124ece6d2..6d98092b968 100644
--- a/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES5.ts
+++ b/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES5.ts
@@ -1,14 +1,19 @@
 // @target: es5
 interface I<T> {
-    [s: number]: T;
+    [n: number]: T;
+}
+interface J<T> {
+    [s: string]: T;
 }
 
-declare function foo<T>(obj: I<T>): T
+declare function foo<T>(obj: I<T>): T;
+declare function g<T>(obj: J<T>): T;
 
 foo({
-    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
     [+"hi"]: [0]
 });
+
+g({ p: "" });
diff --git a/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES6.ts b/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES6.ts
index 2a7a476ca7a..459ce1471b4 100644
--- a/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES6.ts
+++ b/tests/cases/conformance/es6/computedProperties/computedPropertyNamesContextualType7_ES6.ts
@@ -1,14 +1,19 @@
 // @target: es6
 interface I<T> {
-    [s: number]: T;
+    [n: number]: T;
+}
+interface J<T> {
+    [s: string]: T;
 }
 
-declare function foo<T>(obj: I<T>): T
+declare function foo<T>(obj: I<T>): T;
+declare function g<T>(obj: J<T>): T;
 
 foo({
-    101: "",
     0: () => { },
     ["hi" + "bye"]: true,
     [0 + 1]: 0,
     [+"hi"]: [0]
 });
+
+g({ p: "" });

From db856431e8ff5413a35f4e536f1a078dcd2a8200 Mon Sep 17 00:00:00 2001
From: Richard Knoll <riknoll@microsoft.com>
Date: Wed, 25 May 2016 17:07:36 -0700
Subject: [PATCH 100/332] Fixing linter and test errors

---
 src/compiler/commandLineParser.ts        | 15 ++++++++++++++-
 src/compiler/core.ts                     |  2 +-
 src/compiler/sys.ts                      |  6 +-----
 src/services/shims.ts                    |  8 ++++----
 tests/cases/unittests/tsconfigParsing.ts | 21 ---------------------
 5 files changed, 20 insertions(+), 32 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 8dcc21b4d1b..9fec0b1083d 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -713,6 +713,16 @@ namespace ts {
                     errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "exclude", "Array"));
                 }
             }
+            else {
+                // By default, exclude common package folders
+                excludeSpecs = ["node_modules", "bower_components", "jspm_packages"];
+            }
+
+            // Always exclude the output directory unless explicitly included
+            const outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
+            if (outDir) {
+                excludeSpecs.push(outDir);
+            }
 
             if (fileNames === undefined && includeSpecs === undefined) {
                 includeSpecs = ["**/*"];
@@ -885,7 +895,6 @@ namespace ts {
      */
     function matchFileNames(fileNames: string[], include: string[], exclude: string[], basePath: string, options: CompilerOptions, host: ParseConfigHost, errors: Diagnostic[]): ExpandResult {
         basePath = normalizePath(basePath);
-        basePath = removeTrailingDirectorySeparator(basePath);
 
         // The exclude spec list is converted into a regular expression, which allows us to quickly
         // test whether a file or directory should be excluded before recursively traversing the
@@ -941,6 +950,10 @@ namespace ts {
                     continue;
                 }
 
+                if (IgnoreFileNamePattern.test(file)) {
+                    continue;
+                }
+
                 // We may have included a wildcard path with a lower priority
                 // extension due to the user-defined order of entries in the
                 // "include" array. If there is a lower priority extension in the
diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index ae489ad553c..cc3c2b28114 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -1067,7 +1067,7 @@ namespace ts {
 
         return basePaths;
     }
-    
+
     export function ensureScriptKind(fileName: string, scriptKind?: ScriptKind): ScriptKind {
         // Using scriptKind as a condition handles both:
         // - 'scriptKind' is unspecified and thus it is `undefined`
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 3191b8b0056..8e5e76974bf 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -367,7 +367,7 @@ namespace ts {
                     const files: string[] = [];
                     const directories: string[] = [];
                     for (const entry of entries) {
-		        // This is necessary because on some file system node fails to exclude
+                        // This is necessary because on some file system node fails to exclude
                         // "." and "..". See https://github.com/nodejs/node/issues/4002
                         if (entry === "." || entry === "..") {
                             continue;
@@ -391,10 +391,6 @@ namespace ts {
             function readDirectory(path: string, extensions?: string[], excludes?: string[], includes?: string[]): string[] {
                 return matchFiles(path, extensions, excludes, includes, useCaseSensitiveFileNames, process.cwd(), getAccessibleFileSystemEntries);
             }
-	    
-	    function getCanonicalPath(path: string): string {
-                return useCaseSensitiveFileNames ? path : path.toLowerCase();
-            }
 
             const enum FileSystemEntryKind {
                 File,
diff --git a/src/services/shims.ts b/src/services/shims.ts
index 0610c0e0b57..ba9ccdce2dc 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -81,7 +81,7 @@ namespace ts {
          */
         readDirectory(rootDir: string, extension: string, exclude?: string, include?: string, depth?: number): string;
         useCaseSensitiveFileNames?(): boolean;
-	trace(s: string): void;
+        trace(s: string): void;
     }
 
     ///
@@ -432,10 +432,10 @@ namespace ts {
 
         public directoryExists: (directoryName: string) => boolean;
         public realpath: (path: string) => string;
-	    public useCaseSensitiveFileNames: boolean;
+        public useCaseSensitiveFileNames: boolean;
 
         constructor(private shimHost: CoreServicesShimHost) {
-	    this.useCaseSensitiveFileNames = this.shimHost.useCaseSensitiveFileNames ? this.shimHost.useCaseSensitiveFileNames() : false;
+        this.useCaseSensitiveFileNames = this.shimHost.useCaseSensitiveFileNames ? this.shimHost.useCaseSensitiveFileNames() : false;
             if ("directoryExists" in this.shimHost) {
                 this.directoryExists = directoryName => this.shimHost.directoryExists(directoryName);
             }
@@ -453,7 +453,7 @@ namespace ts {
                     JSON.stringify(extensions),
                     JSON.stringify(exclude),
                     JSON.stringify(include),
-		            depth
+                    depth
                 ));
             }
             catch (e) {
diff --git a/tests/cases/unittests/tsconfigParsing.ts b/tests/cases/unittests/tsconfigParsing.ts
index 581575c9479..daa2b2bcdf0 100644
--- a/tests/cases/unittests/tsconfigParsing.ts
+++ b/tests/cases/unittests/tsconfigParsing.ts
@@ -50,27 +50,6 @@ namespace ts {
             const host: ParseConfigHost = new MockParseConfigHost(basePath, true, allFileList);
             const parsed = ts.parseJsonConfigFileContent(json, host, basePath, /*existingOptions*/ undefined, configFileName);
             assert.isTrue(arrayIsEqualTo(parsed.fileNames.sort(), expectedFileList.sort()));
-
-            function mockReadDirectory(rootDir: string, extension: string, exclude: string[]): string[] {
-                const result: string[] = [];
-                const fullExcludeDirectories = ts.map(exclude, directory => combinePaths(rootDir, directory));
-                for (const file of allFileList) {
-                    let shouldExclude = false;
-                    for (const fullExcludeDirectorie of fullExcludeDirectories) {
-                        if (file.indexOf(fullExcludeDirectorie) >= 0) {
-                            shouldExclude = true;
-                            break;
-                        }
-                    }
-                    if (shouldExclude) {
-                        continue;
-                    }
-                    if (fileExtensionIs(file, extension)) {
-                        result.push(file);
-                    }
-                }
-                return result;
-            }
         }
 
         it("returns empty config for file with only whitespaces", () => {

From c340c88706939febc9e6a52f28e3089b94294973 Mon Sep 17 00:00:00 2001
From: Richard Knoll <riknoll@microsoft.com>
Date: Wed, 25 May 2016 17:08:24 -0700
Subject: [PATCH 101/332] Bringing back excludes error and fixing faulty test

---
 src/compiler/commandLineParser.ts        |  3 ++
 src/harness/virtualFileSystem.ts         | 26 +++++++++++++++
 tests/cases/unittests/matchFiles.ts      | 31 ++---------------
 tests/cases/unittests/tsconfigParsing.ts | 42 +++++-------------------
 4 files changed, 41 insertions(+), 61 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 9fec0b1083d..d96e3b30cc9 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -713,6 +713,9 @@ namespace ts {
                     errors.push(createCompilerDiagnostic(Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "exclude", "Array"));
                 }
             }
+            else if (hasProperty(json, "excludes")) {
+                errors.push(createCompilerDiagnostic(Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
+            }
             else {
                 // By default, exclude common package folders
                 excludeSpecs = ["node_modules", "bower_components", "jspm_packages"];
diff --git a/src/harness/virtualFileSystem.ts b/src/harness/virtualFileSystem.ts
index 66bbd715fbc..30192b8b8ec 100644
--- a/src/harness/virtualFileSystem.ts
+++ b/src/harness/virtualFileSystem.ts
@@ -1,4 +1,5 @@
 /// <reference path="harness.ts" />
+/// <reference path="..\compiler\commandLineParser.ts"/>
 namespace Utils {
     export class VirtualFileSystemEntry {
         fileSystem: VirtualFileSystem;
@@ -157,4 +158,29 @@ namespace Utils {
             return directory;
         }
     }
+
+    export class MockParseConfigHost extends VirtualFileSystem implements ts.ParseConfigHost {
+        constructor(currentDirectory: string, ignoreCase: boolean, files: string[]) {
+            super(currentDirectory, ignoreCase);
+            for (const file of files) {
+                this.addFile(file);
+            }
+        }
+
+        readDirectory(path: string, extensions: string[], excludes: string[], includes: string[]) {
+            return ts.matchFiles(path, extensions, excludes, includes, this.useCaseSensitiveFileNames, this.currentDirectory, (path: string) => this.getAccessibleFileSystemEntries(path));
+        }
+
+        getAccessibleFileSystemEntries(path: string) {
+            const entry = this.traversePath(path);
+            if (entry && entry.isDirectory()) {
+                const directory = <VirtualDirectory>entry;
+                return {
+                    files: ts.map(directory.getFiles(), f => f.name),
+                    directories: ts.map(directory.getDirectories(), d => d.name)
+                };
+            }
+            return { files: [], directories: [] };
+        }
+    }
 }
\ No newline at end of file
diff --git a/tests/cases/unittests/matchFiles.ts b/tests/cases/unittests/matchFiles.ts
index 792bad51899..c2d13cf0393 100644
--- a/tests/cases/unittests/matchFiles.ts
+++ b/tests/cases/unittests/matchFiles.ts
@@ -3,33 +3,8 @@
 /// <reference path="..\..\..\src\harness\virtualFileSystem.ts" />
 
 namespace ts {
-    class MockParseConfigHost extends Utils.VirtualFileSystem implements ParseConfigHost {
-        constructor(currentDirectory: string, ignoreCase: boolean, files: string[]) {
-            super(currentDirectory, ignoreCase);
-            for (const file of files) {
-                this.addFile(file);
-            }
-        }
-
-        readDirectory(path: string, extensions: string[], excludes: string[], includes: string[]) {
-            return matchFiles(path, extensions, excludes, includes, this.useCaseSensitiveFileNames, this.currentDirectory, (path: string) => this.getAccessibleFileSystemEntries(path));
-        }
-
-        getAccessibleFileSystemEntries(path: string) {
-            const entry = this.traversePath(path);
-            if (entry && entry.isDirectory()) {
-                const directory = <Utils.VirtualDirectory>entry;
-                return {
-                    files: map(directory.getFiles(), f => f.name),
-                    directories: map(directory.getDirectories(), d => d.name)
-                };
-            }
-            return { files: [], directories: [] };
-        }
-    }
-
     const caseInsensitiveBasePath = "c:/dev/";
-    const caseInsensitiveHost = new MockParseConfigHost(caseInsensitiveBasePath, /*useCaseSensitiveFileNames*/ false, [
+    const caseInsensitiveHost = new Utils.MockParseConfigHost(caseInsensitiveBasePath, /*useCaseSensitiveFileNames*/ false, [
         "c:/dev/a.ts",
         "c:/dev/a.d.ts",
         "c:/dev/a.js",
@@ -53,7 +28,7 @@ namespace ts {
     ]);
 
     const caseSensitiveBasePath = "/dev/";
-    const caseSensitiveHost = new MockParseConfigHost(caseSensitiveBasePath, /*useCaseSensitiveFileNames*/ true, [
+    const caseSensitiveHost = new Utils.MockParseConfigHost(caseSensitiveBasePath, /*useCaseSensitiveFileNames*/ true, [
         "/dev/a.ts",
         "/dev/a.d.ts",
         "/dev/a.js",
@@ -76,7 +51,7 @@ namespace ts {
         "/dev/js/b.js",
     ]);
 
-    const caseInsensitiveMixedExtensionHost = new MockParseConfigHost(caseInsensitiveBasePath, /*useCaseSensitiveFileNames*/ false, [
+    const caseInsensitiveMixedExtensionHost = new Utils.MockParseConfigHost(caseInsensitiveBasePath, /*useCaseSensitiveFileNames*/ false, [
         "c:/dev/a.ts",
         "c:/dev/a.d.ts",
         "c:/dev/a.js",
diff --git a/tests/cases/unittests/tsconfigParsing.ts b/tests/cases/unittests/tsconfigParsing.ts
index daa2b2bcdf0..9b833e64a11 100644
--- a/tests/cases/unittests/tsconfigParsing.ts
+++ b/tests/cases/unittests/tsconfigParsing.ts
@@ -2,31 +2,6 @@
 /// <reference path="..\..\..\src\compiler\commandLineParser.ts" />
 
 namespace ts {
-    class MockParseConfigHost extends Utils.VirtualFileSystem implements ParseConfigHost {
-        constructor(currentDirectory: string, ignoreCase: boolean, files: string[]) {
-            super(currentDirectory, ignoreCase);
-            for (const file of files) {
-                this.addFile(file);
-            }
-        }
-
-        readDirectory(path: string, extensions: string[], excludes: string[], includes: string[]) {
-            return matchFiles(path, extensions, excludes, includes, this.useCaseSensitiveFileNames, this.currentDirectory, (path: string) => this.getAccessibleFileSystemEntries(path));
-        }
-
-        getAccessibleFileSystemEntries(path: string) {
-            const entry = this.traversePath(path);
-            if (entry && entry.isDirectory()) {
-                const directory = <Utils.VirtualDirectory>entry;
-                return {
-                    files: map(directory.getFiles(), f => f.name),
-                    directories: map(directory.getDirectories(), d => d.name)
-                };
-            }
-            return { files: [], directories: [] };
-        }
-    }
-
     describe('parseConfigFileTextToJson', () => {
         function assertParseResult(jsonText: string, expectedConfigObject: { config?: any; error?: Diagnostic }) {
             let parsed = ts.parseConfigFileTextToJson("/apath/tsconfig.json", jsonText);
@@ -41,13 +16,14 @@ namespace ts {
 
         function assertParseErrorWithExcludesKeyword(jsonText: string) {
              let parsed = ts.parseConfigFileTextToJson("/apath/tsconfig.json", jsonText);
-             let parsedCommand = ts.parseJsonConfigFileContent(parsed, ts.sys, "tests/cases/unittests");
-             assert.isTrue(undefined !== parsedCommand.errors);
+             let parsedCommand = ts.parseJsonConfigFileContent(parsed.config, ts.sys, "tests/cases/unittests");
+             assert.isTrue(parsedCommand.errors && parsedCommand.errors.length === 1 &&
+                parsedCommand.errors[0].code === ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude.code);
         }
 
         function assertParseFileList(jsonText: string, configFileName: string, basePath: string, allFileList: string[], expectedFileList: string[]) {
             const json = JSON.parse(jsonText);
-            const host: ParseConfigHost = new MockParseConfigHost(basePath, true, allFileList);
+            const host: ParseConfigHost = new Utils.MockParseConfigHost(basePath, true, allFileList);
             const parsed = ts.parseJsonConfigFileContent(json, host, basePath, /*existingOptions*/ undefined, configFileName);
             assert.isTrue(arrayIsEqualTo(parsed.fileNames.sort(), expectedFileList.sort()));
         }
@@ -125,19 +101,19 @@ namespace ts {
             assertParseResult(
                 `{
                     "compilerOptions": {
-                        "lib": "es5"
+                        "lib": ["es5"]
                     }
                 }`, {
-                    config: { compilerOptions: { lib: "es5" } }
+                    config: { compilerOptions: { lib: ["es5"] } }
                 });
 
             assertParseResult(
                 `{
                     "compilerOptions": {
-                        "lib": "es5,es6"
+                        "lib": ["es5", "es6"]
                     }
                 }`, {
-                    config: { compilerOptions: { lib: "es5,es6" } }
+                    config: { compilerOptions: { lib: ["es5", "es6"] } }
                 });
         });
 
@@ -145,7 +121,7 @@ namespace ts {
             assertParseErrorWithExcludesKeyword(
                 `{
                     "compilerOptions": {
-                        "lib": "es5"
+                        "lib": ["es5"]
                     },
                     "excludes": [
                         "foge.ts"

From 5a627ad1761218066bdcb2771c40750eac7d4a0b Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 26 May 2016 06:01:20 -0700
Subject: [PATCH 102/332] Fix trailing whitespace

---
 src/harness/fourslash.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index 0f11d12097d..3bce13820d7 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -2354,7 +2354,7 @@ ${code}
         let currentFileContent: string = undefined;
         let currentFileName = fileName;
         let currentFileOptions: { [s: string]: string } = {};
-        
+
         function resetLocalData() {
             currentFileContent = undefined;
             currentFileOptions = {};

From 5c23b3bc20ea043e2022487a211364bfa7d320c2 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 26 May 2016 06:04:42 -0700
Subject: [PATCH 103/332] Fix more tests

---
 tests/cases/fourslash/getNavigationBarItems.ts                  | 2 +-
 .../fourslash/navigationBarItemsMultilineStringIdentifiers.ts   | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/cases/fourslash/getNavigationBarItems.ts b/tests/cases/fourslash/getNavigationBarItems.ts
index 8e9b8de5b05..cd09f61011e 100644
--- a/tests/cases/fourslash/getNavigationBarItems.ts
+++ b/tests/cases/fourslash/getNavigationBarItems.ts
@@ -5,7 +5,7 @@
 ////    ["bar"]: string;
 ////}
 
-verify.navigationBarCount(3);
+verify.navigationBarCount(5);
 verify.navigationBarContains("C", "class");
 verify.navigationBarChildItem("C", "[\"bar\"]", "property");
 verify.navigationBarChildItem("C", "foo", "property");
diff --git a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
index 681039d174a..4e7c715e6cd 100644
--- a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
+++ b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
@@ -38,4 +38,4 @@ test.markers().forEach((marker) => {
     verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
 });
 
-verify.navigationBarCount(11); // global + 1 child, interface w/ 2 properties, class w/ 2 properties, 3 modules
+verify.navigationBarCount(12); // global + 1 child, interface w/ 2 properties, class w/ 2 properties, 3 modules

From fe77f541f600492025680e82b58895f3f3ceedd4 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 25 May 2016 07:24:14 -0700
Subject: [PATCH 104/332] Always include a root node in the navigation bar.
 This lets us change the navigation bar counting algorithm to traverse from
 the root only, so it never has duplicate nodes.

---
 src/harness/fourslash.ts      | 19 +++++++++----------
 src/services/navigationBar.ts | 13 +------------
 2 files changed, 10 insertions(+), 22 deletions(-)

diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index 3bce13820d7..048beb21e09 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -1961,23 +1961,22 @@ namespace FourSlash {
 
         public verifyNavigationBarCount(expected: number) {
             const items = this.languageService.getNavigationBarItems(this.activeFile.fileName);
-            const actual = this.getNavigationBarItemsCount(items);
+            const actual = this.getNavigationBarItemsCount(items[0]);
 
             if (expected !== actual) {
                 this.raiseError(`verifyNavigationBarCount failed - found: ${actual} navigation items, expected: ${expected}.`);
             }
         }
 
-        private getNavigationBarItemsCount(items: ts.NavigationBarItem[]) {
-            let result = 0;
-            if (items) {
-                for (let i = 0, n = items.length; i < n; i++) {
-                    result++;
-                    result += this.getNavigationBarItemsCount(items[i].childItems);
-                }
+        private getNavigationBarItemsCount(root: ts.NavigationBarItem) {
+            ts.Debug.assert(root.kind === ts.ScriptElementKind.moduleElement);
+            function recur(item: ts.NavigationBarItem) {
+                let count = 1;
+                for (const child of item.childItems)
+                    count += recur(child);
+                return count;
             }
-
-            return result;
+            return recur(root);
         }
 
         public verifyNavigationBarContains(name: string, kind: string, fileName?: string, parentName?: string, isAdditionalSpan?: boolean, markerPosition?: number) {
diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index bcf0726ffd5..f6f7b741a56 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -9,16 +9,10 @@ namespace ts.NavigationBar {
             return getJsNavigationBarItems(sourceFile, compilerOptions);
         }
 
-        // If the source file has any child items, then it included in the tree
-        // and takes lexical ownership of all other top-level items.
-        let hasGlobalNode = false;
-
         return getItemsWorker(getTopLevelNodes(sourceFile), createTopLevelItem);
 
         function getIndent(node: Node): number {
-            // If we have a global node in the tree,
-            // then it adds an extra layer of depth to all subnodes.
-            let indent = hasGlobalNode ? 1 : 0;
+            let indent = 1; // Global node is the only one with indent 0.
 
             let current = node.parent;
             while (current) {
@@ -508,11 +502,6 @@ namespace ts.NavigationBar {
             function createSourceFileItem(node: SourceFile): ts.NavigationBarItem {
                 const childItems = getItemsWorker(getChildNodes(node.statements), createChildItem);
 
-                if (childItems === undefined || childItems.length === 0) {
-                    return undefined;
-                }
-
-                hasGlobalNode = true;
                 const rootName = isExternalModule(node)
                     ? "\"" + escapeString(getBaseFileName(removeFileExtension(normalizePath(node.fileName)))) + "\""
                     : "<global>";

From fe970abc81e04cfc21b01db6138289fccbfbeef8 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 26 May 2016 07:30:31 -0700
Subject: [PATCH 105/332] Change tests to use the full JSON output of the
 navigation bar. This reduces the confusion of verify.navigationBarCount()
 counting duplicate items.

---
 src/harness/fourslash.ts                      | 113 ++++-------
 .../fourslash/deleteClassWithEnumPresent.ts   |  33 +++-
 tests/cases/fourslash/fourslash.ts            |   4 +-
 .../cases/fourslash/getNavigationBarItems.ts  |  32 +++-
 tests/cases/fourslash/navbar_const.ts         |  24 ++-
 .../navbar_contains-no-duplicates.ts          | 152 ++++++++++++---
 tests/cases/fourslash/navbar_exportDefault.ts |  97 ++++++++--
 tests/cases/fourslash/navbar_let.ts           |  24 ++-
 .../navigationBarItemsBindingPatterns.ts      |  66 +++++--
 ...ionBarItemsBindingPatternsInConstructor.ts |  48 ++++-
 .../navigationBarItemsEmptyConstructors.ts    |  29 ++-
 .../fourslash/navigationBarItemsExports.ts    |  33 +++-
 .../fourslash/navigationBarItemsFunctions.ts  |  60 ++++--
 .../navigationBarItemsFunctionsBroken.ts      |  25 ++-
 .../navigationBarItemsFunctionsBroken2.ts     |  25 ++-
 .../fourslash/navigationBarItemsImports.ts    |  60 ++++--
 ...ionBarItemsInsideMethodsAndConstructors.ts | 159 +++++++++++++---
 .../fourslash/navigationBarItemsItems.ts      | 174 ++++++++++++++---
 .../fourslash/navigationBarItemsItems2.ts     |  29 ++-
 ...rItemsItemsContainsNoAnonymousFunctions.ts |  58 +++++-
 .../navigationBarItemsItemsExternalModules.ts |  36 +++-
 ...navigationBarItemsItemsExternalModules2.ts |  43 ++++-
 ...navigationBarItemsItemsExternalModules3.ts |  43 ++++-
 .../navigationBarItemsItemsModuleVariables.ts |  56 +++++-
 .../navigationBarItemsMissingName1.ts         |  39 ++--
 .../navigationBarItemsMissingName2.ts         |  26 ++-
 .../fourslash/navigationBarItemsModules.ts    | 138 +++++++++++---
 ...ationBarItemsMultilineStringIdentifiers.ts |  98 ++++++++--
 ...BarItemsPropertiesDefinedInConstructors.ts |  41 +++-
 .../fourslash/navigationBarItemsSymbols1.ts   |  42 ++++-
 .../fourslash/navigationBarItemsSymbols2.ts   |  37 +++-
 .../fourslash/navigationBarItemsSymbols3.ts   |  25 ++-
 .../fourslash/navigationBarItemsTypeAlias.ts  |  16 +-
 tests/cases/fourslash/server/navbar01.ts      | 175 +++++++++++++++---
 .../shims-pp/getNavigationBarItems.ts         |  22 ++-
 .../fourslash/shims/getNavigationBarItems.ts  |  22 ++-
 36 files changed, 1656 insertions(+), 448 deletions(-)

diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index 048beb21e09..c33c9107ad7 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -1959,70 +1959,42 @@ namespace FourSlash {
             }
         }
 
-        public verifyNavigationBarCount(expected: number) {
-            const items = this.languageService.getNavigationBarItems(this.activeFile.fileName);
-            const actual = this.getNavigationBarItemsCount(items[0]);
-
-            if (expected !== actual) {
-                this.raiseError(`verifyNavigationBarCount failed - found: ${actual} navigation items, expected: ${expected}.`);
+        public verifyNavigationBar(json: any) {
+            let items = this.languageService.getNavigationBarItems(this.activeFile.fileName);
+            items = this.simplifyNavigationBar(items);
+            if (JSON.stringify(items) !== JSON.stringify(json)) {
+                this.raiseError(`verifyNavigationBar failed - expected: ${JSON.stringify(json, undefined, 2)}, got: ${JSON.stringify(items, undefined, 2)}`)
             }
         }
 
-        private getNavigationBarItemsCount(root: ts.NavigationBarItem) {
-            ts.Debug.assert(root.kind === ts.ScriptElementKind.moduleElement);
-            function recur(item: ts.NavigationBarItem) {
-                let count = 1;
-                for (const child of item.childItems)
-                    count += recur(child);
-                return count;
-            }
-            return recur(root);
-        }
-
-        public verifyNavigationBarContains(name: string, kind: string, fileName?: string, parentName?: string, isAdditionalSpan?: boolean, markerPosition?: number) {
-            fileName = fileName || this.activeFile.fileName;
-            const items = this.languageService.getNavigationBarItems(fileName);
-
-            if (!items || items.length === 0) {
-                this.raiseError("verifyNavigationBarContains failed - found 0 navigation items, expected at least one.");
-            }
-
-            if (this.navigationBarItemsContains(items, name, kind, parentName)) {
-                return;
-            }
-
-            const missingItem = { name, kind, parentName };
-            this.raiseError(`verifyNavigationBarContains failed - could not find the item: ${JSON.stringify(missingItem, undefined, 2)} in the returned list: (${JSON.stringify(items, undefined, 2)})`);
-        }
-
-        private navigationBarItemsContains(items: ts.NavigationBarItem[], name: string, kind: string, parentName?: string) {
-            function recur(items: ts.NavigationBarItem[], curParentName: string) {
-                for (let i = 0; i < items.length; i++) {
-                    const item = items[i];
-                    if (item && item.text === name && item.kind === kind && (!parentName || curParentName === parentName)) {
-                        return true;
-                    }
-                    if (recur(item.childItems, item.text)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            return recur(items, "");
-        }
-
-        public verifyNavigationBarChildItem(parent: string, name: string, kind: string) {
-            const items = this.languageService.getNavigationBarItems(this.activeFile.fileName);
-
-            for (let i = 0; i < items.length; i++) {
-                const item = items[i];
-                if (item.text === parent) {
-                    if (this.navigationBarItemsContains(item.childItems, name, kind))
-                        return;
-                    const missingItem = { name, kind };
-                    this.raiseError(`verifyNavigationBarChildItem failed - could not find the item: ${JSON.stringify(missingItem)} in the children list: (${JSON.stringify(item.childItems, undefined, 2)})`);
-                }
-            }
+        // Remove any properties that tend to all have the same value so that test data is easier to read.
+        private simplifyNavigationBar(items: ts.NavigationBarItem[]): any {
+            return items.map(item => {
+                item = ts.clone(item);
+                if (item.kindModifiers === "")
+                    delete item.kindModifiers;
+                delete item.spans;
+                item.childItems = item.childItems.map(child => {
+                    child = ts.clone(child);
+                    ts.Debug.assert(child.childItems.length === 0);
+                    ts.Debug.assert(child.indent === 0);
+                    ts.Debug.assert(child.bolded === false);
+                    ts.Debug.assert(child.grayed === false);
+                    delete child.childItems;
+                    delete child.indent;
+                    delete child.bolded;
+                    delete child.grayed;
+                    delete child.spans;
+                    if (child.kindModifiers === "")
+                        delete child.kindModifiers;
+                    return child;
+                });
+                if (item.bolded === false)
+                    delete item.bolded;
+                if (item.grayed === false)
+                    delete item.grayed;
+                return item;
+            })
         }
 
         public printNavigationItems(searchValue: string) {
@@ -3041,23 +3013,8 @@ namespace FourSlashInterface {
             this.DocCommentTemplate(/*expectedText*/ undefined, /*expectedOffset*/ undefined, /*empty*/ true);
         }
 
-        public navigationBarCount(count: number) {
-            this.state.verifyNavigationBarCount(count);
-        }
-
-        // TODO: figure out what to do with the unused arguments.
-        public navigationBarContains(
-            name: string,
-            kind: string,
-            fileName?: string,
-            parentName?: string,
-            isAdditionalSpan?: boolean,
-            markerPosition?: number) {
-            this.state.verifyNavigationBarContains(name, kind, fileName, parentName, isAdditionalSpan, markerPosition);
-        }
-
-        public navigationBarChildItem(parent: string, name: string, kind: string) {
-            this.state.verifyNavigationBarChildItem(parent, name, kind);
+        public navigationBar(json: any) {
+            this.state.verifyNavigationBar(json);
         }
 
         public navigationItemsListCount(count: number, searchValue: string, matchKind?: string) {
diff --git a/tests/cases/fourslash/deleteClassWithEnumPresent.ts b/tests/cases/fourslash/deleteClassWithEnumPresent.ts
index 29f7c61e259..d8d4478afe7 100644
--- a/tests/cases/fourslash/deleteClassWithEnumPresent.ts
+++ b/tests/cases/fourslash/deleteClassWithEnumPresent.ts
@@ -5,4 +5,35 @@
 
 goTo.marker();
 edit.deleteAtCaret('class Bar { }'.length);
-verify.navigationBarContains('Foo', 'enum', 'tests/cases/fourslash/deleteClassWithEnumPresent.ts', '');
\ No newline at end of file
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "Foo",
+                "kind": "enum"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "Foo",
+        "kind": "enum",
+        "childItems": [
+            {
+                "text": "a",
+                "kind": "property"
+            },
+            {
+                "text": "b",
+                "kind": "property"
+            },
+            {
+                "text": "c",
+                "kind": "property"
+            }
+        ],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/fourslash.ts b/tests/cases/fourslash/fourslash.ts
index 08883f163f2..8a0d2d36364 100644
--- a/tests/cases/fourslash/fourslash.ts
+++ b/tests/cases/fourslash/fourslash.ts
@@ -175,9 +175,7 @@ declare namespace FourSlashInterface {
         DocCommentTemplate(expectedText: string, expectedOffset: number, empty?: boolean): void;
         noDocCommentTemplate(): void;
 
-        navigationBarCount(count: number): void;
-        navigationBarContains(name: string, kind: string, fileName?: string, parentName?: string, isAdditionalSpan?: boolean, markerPosition?: number): void;
-        navigationBarChildItem(parent: string, text: string, kind: string): void;
+        navigationBar(json: any): void;
         navigationItemsListCount(count: number, searchValue: string, matchKind?: string): void;
         navigationItemsListContains(name: string, kind: string, searchValue: string, matchKind: string, fileName?: string, parentName?: string): void;
         occurrencesAtPositionContains(range: Range, isWriteAccess?: boolean): void;
diff --git a/tests/cases/fourslash/getNavigationBarItems.ts b/tests/cases/fourslash/getNavigationBarItems.ts
index cd09f61011e..a2b0492514a 100644
--- a/tests/cases/fourslash/getNavigationBarItems.ts
+++ b/tests/cases/fourslash/getNavigationBarItems.ts
@@ -5,7 +5,31 @@
 ////    ["bar"]: string;
 ////}
 
-verify.navigationBarCount(5);
-verify.navigationBarContains("C", "class");
-verify.navigationBarChildItem("C", "[\"bar\"]", "property");
-verify.navigationBarChildItem("C", "foo", "property");
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "C",
+                "kind": "class"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "C",
+        "kind": "class",
+        "childItems": [
+            {
+                "text": "[\"bar\"]",
+                "kind": "property"
+            },
+            {
+                "text": "foo",
+                "kind": "property"
+            }
+        ],
+        "indent": 1
+    }
+])
diff --git a/tests/cases/fourslash/navbar_const.ts b/tests/cases/fourslash/navbar_const.ts
index 5d8b42607c8..02a10f46a74 100644
--- a/tests/cases/fourslash/navbar_const.ts
+++ b/tests/cases/fourslash/navbar_const.ts
@@ -1,13 +1,17 @@
 /// <reference path="fourslash.ts" />
 
-//// {| "itemName": "c", "kind": "const", "parentName": "<global>" |}const c = 0;
+//// const c = 0;
 
-test.markers().forEach(marker => {
-    verify.navigationBarContains(
-        marker.data.itemName,
-        marker.data.kind,
-        marker.fileName,
-        marker.data.parentName,
-        marker.data.isAdditionalRange,
-        marker.position);
-});
\ No newline at end of file
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "c",
+                "kind": "const"
+            }
+        ],
+        "indent": 0
+    }
+]);
diff --git a/tests/cases/fourslash/navbar_contains-no-duplicates.ts b/tests/cases/fourslash/navbar_contains-no-duplicates.ts
index 42b33a722ad..333130ff795 100644
--- a/tests/cases/fourslash/navbar_contains-no-duplicates.ts
+++ b/tests/cases/fourslash/navbar_contains-no-duplicates.ts
@@ -1,42 +1,142 @@
 /// <reference path="fourslash.ts" />
-//// {| "itemName": "Windows", "kind": "module", "parentName": "<global>" |}declare module Windows {
-////     {| "itemName": "Foundation", "kind": "module", "parentName": "Windows" |}export module Foundation {
-////         export var {| "itemName": "A", "kind": "var" |}A;
-////         {| "itemName": "Test", "kind": "class", "parentName": "Foundation" |}export class Test {
-////             {| "itemName": "wow", "kind": "method" |}public wow();
+//// declare module Windows {
+////     export module Foundation {
+////         export var A;
+////         export class Test {
+////             public wow();
 ////         }
 ////     }
 //// }
 //// 
-//// {| "itemName": "Windows", "kind": "module", "parentName": "<global>", "isAdditionalRange": true |}declare module Windows {
-////     {| "itemName": "Foundation", "kind": "module", "parentName": "Windows", "isAdditionalRange": true |}export module Foundation {
-////         export var {| "itemName": "B", "kind": "var" |}B;
-////         {| "itemName": "Test", "kind": "module" |}export module Test {
-////             {| "itemName": "Boom", "kind": "function" |}export function Boom(): number;
+//// declare module Windows {
+////     export module Foundation {
+////         export var B;
+////         export module Test {
+////             export function Boom(): number;
 ////         }
 ////     }
 //// }
 //// 
-//// {| "itemName": "ABC", "kind": "class", "parentName": "" |}class ABC {
-////     {| "itemName": "foo", "kind": "method" |}public foo() {
+//// class ABC {
+////     public foo() {
 ////         return 3;
 ////     }
 //// }
 //// 
-//// {| "itemName": "ABC", "kind": "module", "parentName": "<global>" |}module ABC {
-////     export var {| "itemName": "x", "kind": "var" |}x = 3;
+//// module ABC {
+////     export var x = 3;
 //// }
 
-test.markers().forEach(marker => {
-    if (marker.data) {
-        verify.navigationBarContains(
-            marker.data.itemName,
-            marker.data.kind,
-            marker.fileName,
-            marker.data.parentName,
-            marker.data.isAdditionalRange,
-            marker.position);
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "ABC",
+                "kind": "class"
+            },
+            {
+                "text": "ABC",
+                "kind": "module"
+            },
+            {
+                "text": "Windows",
+                "kind": "module",
+                "kindModifiers": "declare"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "ABC",
+        "kind": "class",
+        "childItems": [
+            {
+                "text": "foo",
+                "kind": "method",
+                "kindModifiers": "public"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "ABC",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "x",
+                "kind": "var",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "Windows",
+        "kind": "module",
+        "kindModifiers": "declare",
+        "childItems": [
+            {
+                "text": "Foundation",
+                "kind": "module",
+                "kindModifiers": "export,declare"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "Foundation",
+        "kind": "module",
+        "kindModifiers": "export,declare",
+        "childItems": [
+            {
+                "text": "A",
+                "kind": "var",
+                "kindModifiers": "export,declare"
+            },
+            {
+                "text": "Test",
+                "kind": "class",
+                "kindModifiers": "export,declare"
+            },
+            {
+                "text": "B",
+                "kind": "var",
+                "kindModifiers": "export,declare"
+            },
+            {
+                "text": "Test",
+                "kind": "module",
+                "kindModifiers": "export,declare"
+            }
+        ],
+        "indent": 2
+    },
+    {
+        "text": "Test",
+        "kind": "class",
+        "kindModifiers": "export,declare",
+        "childItems": [
+            {
+                "text": "wow",
+                "kind": "method",
+                "kindModifiers": "public,declare"
+            }
+        ],
+        "indent": 3
+    },
+    {
+        "text": "Test",
+        "kind": "module",
+        "kindModifiers": "export,declare",
+        "childItems": [
+            {
+                "text": "Boom",
+                "kind": "function",
+                "kindModifiers": "export,declare"
+            }
+        ],
+        "indent": 3
     }
-});
-
-verify.navigationBarCount(19);
+]);
diff --git a/tests/cases/fourslash/navbar_exportDefault.ts b/tests/cases/fourslash/navbar_exportDefault.ts
index a56eeb8b226..7c666589f12 100644
--- a/tests/cases/fourslash/navbar_exportDefault.ts
+++ b/tests/cases/fourslash/navbar_exportDefault.ts
@@ -1,24 +1,93 @@
 /// <reference path="fourslash.ts" />
 
 // @Filename: a.ts
-//// {| "itemName": "default", "kind": "class", "parentName": "" |}export default class { }
+////export default class { }
 
 // @Filename: b.ts
-//// {| "itemName": "C", "kind": "class", "parentName": "" |}export default class C { }
+////export default class C { }
 
 // @Filename: c.ts
-//// {| "itemName": "default", "kind": "function", "parentName": "" |}export default function { }
+////export default function { }
 
 // @Filename: d.ts
-//// {| "itemName": "Func", "kind": "function", "parentName": "" |}export default function Func { }
+////export default function Func { }
 
-test.markers().forEach(marker => {
-    goTo.file(marker.fileName);
-    verify.navigationBarContains(
-        marker.data.itemName,
-        marker.data.kind,
-        marker.fileName,
-        marker.data.parentName,
-        marker.data.isAdditionalRange,
-        marker.position);
-});
\ No newline at end of file
+goTo.file("a.ts");
+verify.navigationBar([
+    {
+        "text": "\"a\"",
+        "kind": "module",
+        "childItems": [],
+        "indent": 0
+    },
+    {
+        "text": "default",
+        "kind": "class",
+        "kindModifiers": "export",
+        "childItems": [],
+        "indent": 1
+    }
+]);
+
+goTo.file("b.ts");
+verify.navigationBar([
+    {
+        "text": "\"b\"",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "C",
+                "kind": "class",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "C",
+        "kind": "class",
+        "kindModifiers": "export",
+        "childItems": [],
+        "indent": 1
+    }
+]);
+
+goTo.file("c.ts");
+verify.navigationBar([
+    {
+        "text": "\"c\"",
+        "kind": "module",
+        "childItems": [],
+        "indent": 0
+    },
+    {
+        "text": "default",
+        "kind": "function",
+        "kindModifiers": "export",
+        "childItems": [],
+        "indent": 1
+    }
+]);
+
+goTo.file("d.ts");
+verify.navigationBar([
+    {
+        "text": "\"d\"",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "Func",
+                "kind": "function",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "Func",
+        "kind": "function",
+        "kindModifiers": "export",
+        "childItems": [],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navbar_let.ts b/tests/cases/fourslash/navbar_let.ts
index c3b125526ef..dc9d9c07857 100644
--- a/tests/cases/fourslash/navbar_let.ts
+++ b/tests/cases/fourslash/navbar_let.ts
@@ -1,13 +1,17 @@
 /// <reference path="fourslash.ts" />
 
-//// {| "itemName": "c", "kind": "let", "parentName": "" |}let c = 0;
+////let c = 0;
 
-test.markers().forEach(marker => {
-    verify.navigationBarContains(
-        marker.data.itemName,
-        marker.data.kind,
-        marker.fileName,
-        marker.data.parentName,
-        marker.data.isAdditionalRange,
-        marker.position);
-});
\ No newline at end of file
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "c",
+                "kind": "let"
+            }
+        ],
+        "indent": 0
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsBindingPatterns.ts b/tests/cases/fourslash/navigationBarItemsBindingPatterns.ts
index afac15daacc..007a9c9b804 100644
--- a/tests/cases/fourslash/navigationBarItemsBindingPatterns.ts
+++ b/tests/cases/fourslash/navigationBarItemsBindingPatterns.ts
@@ -6,16 +6,56 @@
 ////const bar1, [c, d]
 ////var {e, x: [f, g]} = {a:1, x:[]};
 
-verify.navigationBarCount(12); // global (1) + variable declarations (4) + binding patterns (7)
-verify.navigationBarContains("foo", "var");
-verify.navigationBarContains("bar", "var");
-verify.navigationBarContains("foo1", "let")
-verify.navigationBarContains("a", "let");
-verify.navigationBarContains("b", "let");
-verify.navigationBarContains("bar1", "const");
-verify.navigationBarContains("c", "const");
-verify.navigationBarContains("d", "const");
-verify.navigationBarContains("e", "var");
-verify.navigationBarContains("f", "var");
-verify.navigationBarContains("g", "var");
-
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "a",
+                "kind": "let"
+            },
+            {
+                "text": "b",
+                "kind": "let"
+            },
+            {
+                "text": "bar",
+                "kind": "var"
+            },
+            {
+                "text": "bar1",
+                "kind": "const"
+            },
+            {
+                "text": "c",
+                "kind": "const"
+            },
+            {
+                "text": "d",
+                "kind": "const"
+            },
+            {
+                "text": "e",
+                "kind": "var"
+            },
+            {
+                "text": "f",
+                "kind": "var"
+            },
+            {
+                "text": "foo",
+                "kind": "var"
+            },
+            {
+                "text": "foo1",
+                "kind": "let"
+            },
+            {
+                "text": "g",
+                "kind": "var"
+            }
+        ],
+        "indent": 0
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsBindingPatternsInConstructor.ts b/tests/cases/fourslash/navigationBarItemsBindingPatternsInConstructor.ts
index 24979e141e5..41751f5c74b 100644
--- a/tests/cases/fourslash/navigationBarItemsBindingPatternsInConstructor.ts
+++ b/tests/cases/fourslash/navigationBarItemsBindingPatternsInConstructor.ts
@@ -11,4 +11,50 @@
 ////    }
 ////}
 
-verify.navigationBarCount(9); // global + 2 children + 2x(class + field + constructor)
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "A",
+                "kind": "class"
+            },
+            {
+                "text": "B",
+                "kind": "class"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "A",
+        "kind": "class",
+        "childItems": [
+            {
+                "text": "constructor",
+                "kind": "constructor"
+            },
+            {
+                "text": "x",
+                "kind": "property"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "B",
+        "kind": "class",
+        "childItems": [
+            {
+                "text": "constructor",
+                "kind": "constructor"
+            },
+            {
+                "text": "x",
+                "kind": "property"
+            }
+        ],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsEmptyConstructors.ts b/tests/cases/fourslash/navigationBarItemsEmptyConstructors.ts
index a80f4c596d4..27c33f6afb2 100644
--- a/tests/cases/fourslash/navigationBarItemsEmptyConstructors.ts
+++ b/tests/cases/fourslash/navigationBarItemsEmptyConstructors.ts
@@ -5,8 +5,27 @@
 ////    }
 ////}
 
-verify.navigationBarContains("Test", "class");
-verify.navigationBarContains("constructor", "constructor");
-
-// no other items
-verify.navigationBarCount(4); // global + 1 child, Test + 1 child
\ No newline at end of file
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "Test",
+                "kind": "class"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "Test",
+        "kind": "class",
+        "childItems": [
+            {
+                "text": "constructor",
+                "kind": "constructor"
+            }
+        ],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsExports.ts b/tests/cases/fourslash/navigationBarItemsExports.ts
index b88b60d0efb..79422f96274 100644
--- a/tests/cases/fourslash/navigationBarItemsExports.ts
+++ b/tests/cases/fourslash/navigationBarItemsExports.ts
@@ -1,18 +1,33 @@
 /// <reference path="fourslash.ts"/>
 
 
-////export { {| "itemName": "a", "kind": "alias", "parentName": "" |}a } from "a";
+////export { a } from "a";
 ////
-////export { {| "itemName": "B", "kind": "alias", "parentName": "" |}b as B } from "a" 
+////export { b as B } from "a" 
 ////
-////{| "itemName": "e", "kind": "alias", "parentName": "" |} export import e = require("a");
+////export import e = require("a");
 ////
 ////export * from "a"; // no bindings here
 
-test.markers().forEach((marker) => {
-    if (marker.data) {
-        verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
+verify.navigationBar([
+    {
+        "text": "\"navigationBarItemsExports\"",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "a",
+                "kind": "alias"
+            },
+            {
+                "text": "B",
+                "kind": "alias"
+            },
+            {
+                "text": "e",
+                "kind": "alias",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 0
     }
-});
-
-verify.navigationBarCount(4);
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsFunctions.ts b/tests/cases/fourslash/navigationBarItemsFunctions.ts
index 0948923c046..e2260f2ff2b 100644
--- a/tests/cases/fourslash/navigationBarItemsFunctions.ts
+++ b/tests/cases/fourslash/navigationBarItemsFunctions.ts
@@ -1,23 +1,61 @@
 /// <reference path="fourslash.ts"/>
 
-////{| "itemName": "<global>", "kind": "module" |}
-////
-////{| "itemName": "foo", "kind": "function" |}function foo() {
+////function foo() {
 ////    var x = 10;
-////    {| "itemName": "bar", "kind": "function", "parentName": "foo" |}function bar() {
+////    function bar() {
 ////        var y = 10;
-////        {| "itemName": "biz", "kind": "function", "parentName": "bar" |}function biz() {
+////        function biz() {
 ////            var z = 10;
 ////        }
 ////    }
 ////}
 ////
-////{| "itemName": "baz", "kind": "function", "parentName": "<global>" |}function baz() {
+////function baz() {
 ////    var v = 10;
 ////}
 
-test.markers().forEach((marker) => {
-    verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
-});
-
-verify.navigationBarCount(8); // 4 functions + global.  Note: there are 8 because of the functions show up at the top level and as child items.
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "baz",
+                "kind": "function"
+            },
+            {
+                "text": "foo",
+                "kind": "function"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "baz",
+        "kind": "function",
+        "childItems": [],
+        "indent": 1
+    },
+    {
+        "text": "foo",
+        "kind": "function",
+        "childItems": [
+            {
+                "text": "bar",
+                "kind": "function"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "bar",
+        "kind": "function",
+        "childItems": [
+            {
+                "text": "biz",
+                "kind": "function"
+            }
+        ],
+        "indent": 2
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsFunctionsBroken.ts b/tests/cases/fourslash/navigationBarItemsFunctionsBroken.ts
index e8bf1d33fc3..dc84b50ff30 100644
--- a/tests/cases/fourslash/navigationBarItemsFunctionsBroken.ts
+++ b/tests/cases/fourslash/navigationBarItemsFunctionsBroken.ts
@@ -1,12 +1,25 @@
 /// <reference path="fourslash.ts"/>
 
-////{| "itemName": "f", "kind": "function" |}
 ////function f() {
 ////    function;
 ////}
 
-test.markers().forEach((marker) => {
-    verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
-});
-
-verify.navigationBarCount(3); // <global> and 'f'. 
\ No newline at end of file
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "f",
+                "kind": "function"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "f",
+        "kind": "function",
+        "childItems": [],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsFunctionsBroken2.ts b/tests/cases/fourslash/navigationBarItemsFunctionsBroken2.ts
index 9576d4dd789..b4612efcac0 100644
--- a/tests/cases/fourslash/navigationBarItemsFunctionsBroken2.ts
+++ b/tests/cases/fourslash/navigationBarItemsFunctionsBroken2.ts
@@ -1,13 +1,26 @@
 /// <reference path="fourslash.ts"/>
 
 ////function;
-////{| "itemName": "f", "kind": "function" |}
 ////function f() {
 ////    function;
 ////}
 
-test.markers().forEach((marker) => {
-    verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
-});
-
-verify.navigationBarCount(3); // <global> and 'f'
\ No newline at end of file
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "f",
+                "kind": "function"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "f",
+        "kind": "function",
+        "childItems": [],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsImports.ts b/tests/cases/fourslash/navigationBarItemsImports.ts
index 53619da310a..d6526a7a68c 100644
--- a/tests/cases/fourslash/navigationBarItemsImports.ts
+++ b/tests/cases/fourslash/navigationBarItemsImports.ts
@@ -1,25 +1,57 @@
 /// <reference path="fourslash.ts"/>
 
 
-////import {| "itemName": "d1", "kind": "alias", "parentName": "" |}d1 from "a";
+////import d1 from "a";
 ////
-////import { {| "itemName": "a", "kind": "alias", "parentName": "" |}a } from "a";
+////import { a } from "a";
 ////
-////import { {| "itemName": "B", "kind": "alias", "parentName": "" |}b as B } from "a" 
+////import { b as B } from "a" 
 ////
-////import {| "itemName": "d2", "kind": "alias", "parentName": "" |}d2,
-////            { {| "itemName": "c", "kind": "alias", "parentName": "" |}c,
-////            {| "itemName": "D", "kind": "alias", "parentName": "" |} d as D } from "a" 
+////import d2, { c, d as D } from "a" 
 ////
-////{| "itemName": "e", "kind": "alias", "parentName": "" |}import e = require("a");
+////import e = require("a");
 ////
-////import {| "itemName": "ns", "kind": "alias", "parentName": "" |}* as ns from "a";
+////import * as ns from "a";
 
 
-test.markers().forEach((marker) => {
-    if (marker.data) {
-        verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
+verify.navigationBar([
+    {
+        "text": "\"navigationBarItemsImports\"",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "a",
+                "kind": "alias"
+            },
+            {
+                "text": "B",
+                "kind": "alias"
+            },
+            {
+                "text": "c",
+                "kind": "alias"
+            },
+            {
+                "text": "D",
+                "kind": "alias"
+            },
+            {
+                "text": "d1",
+                "kind": "alias"
+            },
+            {
+                "text": "d2",
+                "kind": "alias"
+            },
+            {
+                "text": "e",
+                "kind": "alias"
+            },
+            {
+                "text": "ns",
+                "kind": "alias"
+            }
+        ],
+        "indent": 0
     }
-});
-
-verify.navigationBarCount(9);
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts b/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
index 8d93d241ae1..7d2fb4ed127 100644
--- a/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
+++ b/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
@@ -2,41 +2,140 @@
 
 ////class Class {
 ////    constructor() {
-////        {| "itemName": "LocalFunctionInConstructor", "kind": "function", "parentName": "constructor"|}function LocalFunctionInConstructor() {
-////
-////        }
-////
-////        {| "itemName": "LocalInterfaceInConstrcutor", "kind": "interface", "parentName": "constructor"|}interface LocalInterfaceInConstrcutor {
-////        }
-////
-////        {| "itemName": "LocalEnumInConstructor", "kind": "enum", "parentName": "constructor"|}enum LocalEnumInConstructor {
-////            {| "itemName": "LocalEnumMemberInConstructor", "kind": "property", "parentName": "LocalEnumInConstructor"|}LocalEnumMemberInConstructor,
-////        }
+////        function LocalFunctionInConstructor() {}
+////        interface LocalInterfaceInConstrcutor {}
+////        enum LocalEnumInConstructor { LocalEnumMemberInConstructor }
 ////    }
 ////
 ////    method() {
-////        {| "itemName": "LocalFunctionInMethod", "kind": "function", "parentName": "method"|}function LocalFunctionInMethod() {
-////            {| "itemName": "LocalFunctionInLocalFunctionInMethod", "kind": "function", "parentName": "LocalFunctionInMethod"|}function LocalFunctionInLocalFunctionInMethod() {
-////
-////            }
-////        }
-////
-////        {| "itemName": "LocalInterfaceInMethod", "kind": "interface", "parentName": "method"|}interface LocalInterfaceInMethod {
-////        }
-////
-////        {| "itemName": "LocalEnumInMethod", "kind": "enum", "parentName": "method"|}enum LocalEnumInMethod {
-////            {| "itemName": "LocalEnumMemberInMethod", "kind": "property", "parentName": "LocalEnumInMethod"|}LocalEnumMemberInMethod,
+////        function LocalFunctionInMethod() {
+////            function LocalFunctionInLocalFunctionInMethod() {}
 ////        }
+////        interface LocalInterfaceInMethod {}
+////        enum LocalEnumInMethod { LocalEnumMemberInMethod }
 ////    }
 ////
-////    emptyMethod() { // Non child functions method should not be duplicated
-////
-////    }
+////    emptyMethod() { } // Non child functions method should not be duplicated
 ////}
 
-test.markers().forEach((marker) => {
-    verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
-});
-
-// no other items
-verify.navigationBarCount(23);
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "Class",
+                "kind": "class"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "Class",
+        "kind": "class",
+        "childItems": [
+            {
+                "text": "constructor",
+                "kind": "constructor"
+            },
+            {
+                "text": "emptyMethod",
+                "kind": "method"
+            },
+            {
+                "text": "method",
+                "kind": "method"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "constructor",
+        "kind": "constructor",
+        "childItems": [
+            {
+                "text": "LocalEnumInConstructor",
+                "kind": "enum"
+            },
+            {
+                "text": "LocalFunctionInConstructor",
+                "kind": "function"
+            },
+            {
+                "text": "LocalInterfaceInConstrcutor",
+                "kind": "interface"
+            }
+        ],
+        "indent": 2
+    },
+    {
+        "text": "LocalEnumInConstructor",
+        "kind": "enum",
+        "childItems": [
+            {
+                "text": "LocalEnumMemberInConstructor",
+                "kind": "property"
+            }
+        ],
+        "indent": 2
+    },
+    {
+        "text": "LocalFunctionInConstructor",
+        "kind": "function",
+        "childItems": [],
+        "indent": 2
+    },
+    {
+        "text": "LocalInterfaceInConstrcutor",
+        "kind": "interface",
+        "childItems": [],
+        "indent": 2
+    },
+    {
+        "text": "method",
+        "kind": "method",
+        "childItems": [
+            {
+                "text": "LocalEnumInMethod",
+                "kind": "enum"
+            },
+            {
+                "text": "LocalFunctionInMethod",
+                "kind": "function"
+            },
+            {
+                "text": "LocalInterfaceInMethod",
+                "kind": "interface"
+            }
+        ],
+        "indent": 2
+    },
+    {
+        "text": "LocalEnumInMethod",
+        "kind": "enum",
+        "childItems": [
+            {
+                "text": "LocalEnumMemberInMethod",
+                "kind": "property"
+            }
+        ],
+        "indent": 2
+    },
+    {
+        "text": "LocalFunctionInMethod",
+        "kind": "function",
+        "childItems": [
+            {
+                "text": "LocalFunctionInLocalFunctionInMethod",
+                "kind": "function"
+            }
+        ],
+        "indent": 2
+    },
+    {
+        "text": "LocalInterfaceInMethod",
+        "kind": "interface",
+        "childItems": [],
+        "indent": 2
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsItems.ts b/tests/cases/fourslash/navigationBarItemsItems.ts
index e8e9fd40824..013d28cd402 100644
--- a/tests/cases/fourslash/navigationBarItemsItems.ts
+++ b/tests/cases/fourslash/navigationBarItemsItems.ts
@@ -1,52 +1,172 @@
 /// <reference path="fourslash.ts"/>
 
 ////// Interface
-////{| "itemName": "IPoint", "kind": "interface", "parentName": "<global>" |}interface IPoint {
-////    {| "itemName": "getDist", "kind": "method", "parentName": "IPoint" |}getDist(): number;
-////    {| "itemName": "new()", "kind": "construct", "parentName": "IPoint" |}new(): IPoint;
-////    {| "itemName": "()", "kind": "call", "parentName": "IPoint" |}(): any;
-////    {| "itemName": "[]", "kind": "index", "parentName": "IPoint" |}[x:string]: number;
-////    {| "itemName": "prop", "kind": "property", "parentName": "IPoint" |}prop: string;
+////interface IPoint {
+////    getDist(): number;
+////    new(): IPoint;
+////    (): any;
+////    [x:string]: number;
+////    prop: string;
 ////}
 ////
 /////// Module
-////{| "itemName": "Shapes", "kind": "module", "parentName": "<global>" |}module Shapes {
+////module Shapes {
 ////
 ////    // Class
-////    {| "itemName": "Point", "kind": "class", "parentName": "Shapes" |}export class Point implements IPoint {
-////        {| "itemName": "constructor", "kind": "constructor", "parentName": "Point" |}constructor (public x: number, public y: number) { }
+////    export class Point implements IPoint {
+////        constructor (public x: number, public y: number) { }
 ////
 ////        // Instance member
-////        {| "itemName": "getDist", "kind": "method", "parentName": "Point" |}getDist() { return Math.sqrt(this.x * this.x + this.y * this.y); }
+////        getDist() { return Math.sqrt(this.x * this.x + this.y * this.y); }
 ////
 ////        // Getter
-////        {| "itemName": "value", "kind": "getter", "parentName": "Point" |}get value(): number { return 0; }
+////        get value(): number { return 0; }
 ////
 ////        // Setter
-////        {| "itemName": "value", "kind": "setter", "parentName": "Point" |}set value(newValue: number) { return; }
+////        set value(newValue: number) { return; }
 ////
 ////        // Static member
-////        {| "itemName": "origin", "kind": "property", "parentName": "Point" |}static origin = new Point(0, 0);
+////        static origin = new Point(0, 0);
 ////
 ////        // Static method
-////        {| "itemName": "getOrigin", "kind": "method", "parentName": "Point" |}private static getOrigin() { return Point.origin;}
+////        private static getOrigin() { return Point.origin; }
 ////    }
 ////
-////    {| "itemName": "Values", "kind": "enum", "parentName": "Shapes" |}enum Values {
-////        value1,
-////        {| "itemName": "value2", "kind": "property", "parentName": "Values" |}value2,
-////        value3,
-////    }
+////    enum Values { value1, value2, value3 }
 ////}
 ////
 ////// Local variables
-////{| "itemName": "p", "kind": "var", "parentName": "" |}var p: IPoint = new Shapes.Point(3, 4);
-////{| "itemName": "dist", "kind": "var", "parentName": "" |}var dist = p.getDist();
+////var p: IPoint = new Shapes.Point(3, 4);
+////var dist = p.getDist();
 
-test.markers().forEach((marker) => {
-    if (marker.data) {
-        verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "dist",
+                "kind": "var"
+            },
+            {
+                "text": "IPoint",
+                "kind": "interface"
+            },
+            {
+                "text": "p",
+                "kind": "var"
+            },
+            {
+                "text": "Shapes",
+                "kind": "module"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "IPoint",
+        "kind": "interface",
+        "childItems": [
+            {
+                "text": "()",
+                "kind": "call"
+            },
+            {
+                "text": "new()",
+                "kind": "construct"
+            },
+            {
+                "text": "[]",
+                "kind": "index"
+            },
+            {
+                "text": "getDist",
+                "kind": "method"
+            },
+            {
+                "text": "prop",
+                "kind": "property"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "Shapes",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "Point",
+                "kind": "class",
+                "kindModifiers": "export"
+            },
+            {
+                "text": "Values",
+                "kind": "enum"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "Point",
+        "kind": "class",
+        "kindModifiers": "export",
+        "childItems": [
+            {
+                "text": "constructor",
+                "kind": "constructor"
+            },
+            {
+                "text": "getDist",
+                "kind": "method"
+            },
+            {
+                "text": "getOrigin",
+                "kind": "method",
+                "kindModifiers": "private,static"
+            },
+            {
+                "text": "origin",
+                "kind": "property",
+                "kindModifiers": "static"
+            },
+            {
+                "text": "value",
+                "kind": "getter"
+            },
+            {
+                "text": "value",
+                "kind": "setter"
+            },
+            {
+                "text": "x",
+                "kind": "property",
+                "kindModifiers": "public"
+            },
+            {
+                "text": "y",
+                "kind": "property",
+                "kindModifiers": "public"
+            }
+        ],
+        "indent": 2
+    },
+    {
+        "text": "Values",
+        "kind": "enum",
+        "childItems": [
+            {
+                "text": "value1",
+                "kind": "property"
+            },
+            {
+                "text": "value2",
+                "kind": "property"
+            },
+            {
+                "text": "value3",
+                "kind": "property"
+            }
+        ],
+        "indent": 2
     }
-});
-
-verify.navigationBarCount(27);
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsItems2.ts b/tests/cases/fourslash/navigationBarItemsItems2.ts
index 013f27b4d71..27c32531d6b 100644
--- a/tests/cases/fourslash/navigationBarItemsItems2.ts
+++ b/tests/cases/fourslash/navigationBarItemsItems2.ts
@@ -1,6 +1,5 @@
 /// <reference path="fourslash.ts"/>
 
-
 /////**/
 
 goTo.marker();
@@ -8,5 +7,29 @@ edit.insertLine("module A");
 edit.insert("export class ");
 
 // should not crash
-verify.navigationBarCount(4);
-
+verify.navigationBar([
+    {
+        "text": "\"navigationBarItemsItems2\"",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "A",
+                "kind": "module"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "default",
+        "kind": "class",
+        "kindModifiers": "export",
+        "childItems": [],
+        "indent": 1
+    },
+    {
+        "text": "A",
+        "kind": "module",
+        "childItems": [],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsItemsContainsNoAnonymousFunctions.ts b/tests/cases/fourslash/navigationBarItemsItemsContainsNoAnonymousFunctions.ts
index dac6e96ab93..34e4a1c0c89 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsContainsNoAnonymousFunctions.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsContainsNoAnonymousFunctions.ts
@@ -30,15 +30,57 @@
 ////}
 
 goTo.marker("file1");
-verify.navigationBarCount(0);
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [],
+        "indent": 0
+    }
+]);
 
 goTo.marker("file2");
-verify.navigationBarContains("<global>", "module");
-verify.navigationBarContains("x", "var");
-verify.navigationBarCount(2);
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "x",
+                "kind": "var"
+            }
+        ],
+        "indent": 0
+    }
+]);
 
 goTo.marker("file3");
-verify.navigationBarContains("<global>", "module");
-verify.navigationBarContains("foo", "function");
-verify.navigationBarContains("bar", "function");
-verify.navigationBarCount(5);
\ No newline at end of file
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "bar",
+                "kind": "function"
+            },
+            {
+                "text": "foo",
+                "kind": "function"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "bar",
+        "kind": "function",
+        "childItems": [],
+        "indent": 1
+    },
+    {
+        "text": "foo",
+        "kind": "function",
+        "childItems": [],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsItemsExternalModules.ts b/tests/cases/fourslash/navigationBarItemsItemsExternalModules.ts
index 7b2e0def4bf..f2df772fb19 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsExternalModules.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsExternalModules.ts
@@ -1,11 +1,33 @@
 /// <reference path="fourslash.ts"/>
 
-////{| "itemName": "Bar", "kind": "class", "parentName": "\"navigationBarItemsItemsExternalModules\"" |}export class Bar {
-////    {| "itemName": "s", "kind": "property", "parentName": "Bar" |}public s: string;
+////export class Bar {
+////    public s: string;
 ////}
 
-test.markers().forEach((marker) => {
-    verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
-});
-
-verify.navigationBarCount(4); // external module node + class + property
+verify.navigationBar([
+    {
+        "text": "\"navigationBarItemsItemsExternalModules\"",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "Bar",
+                "kind": "class",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "Bar",
+        "kind": "class",
+        "kindModifiers": "export",
+        "childItems": [
+            {
+                "text": "s",
+                "kind": "property",
+                "kindModifiers": "public"
+            }
+        ],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsItemsExternalModules2.ts b/tests/cases/fourslash/navigationBarItemsItemsExternalModules2.ts
index 9087493b298..54d4759afe6 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsExternalModules2.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsExternalModules2.ts
@@ -1,15 +1,40 @@
 /// <reference path="fourslash.ts"/>
 
 // @Filename: test/file.ts
-////{| "itemName": "Bar", "kind": "class", "parentName": "\"file\"" |}export class Bar {
-////    {| "itemName": "s", "kind": "property", "parentName": "Bar" |}public s: string;
+////export class Bar {
+////    public s: string;
 ////}
-////{| "itemName": "\"file\"", "kind": "module" |}
-////{| "itemName": "x", "kind": "var", "parentName": "\"file\"" |}
 ////export var x: number;
 
-test.markers().forEach((marker) => {
-    verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
-});
-
-verify.navigationBarCount(5); // external module node + variable in module + class + property
+verify.navigationBar([
+    {
+        "text": "\"file\"",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "Bar",
+                "kind": "class",
+                "kindModifiers": "export"
+            },
+            {
+                "text": "x",
+                "kind": "var",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "Bar",
+        "kind": "class",
+        "kindModifiers": "export",
+        "childItems": [
+            {
+                "text": "s",
+                "kind": "property",
+                "kindModifiers": "public"
+            }
+        ],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsItemsExternalModules3.ts b/tests/cases/fourslash/navigationBarItemsItemsExternalModules3.ts
index a00b3a131dd..2db04c980d2 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsExternalModules3.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsExternalModules3.ts
@@ -1,15 +1,40 @@
 /// <reference path="fourslash.ts"/>
 
 // @Filename: test/my fil"e.ts
-////{| "itemName": "Bar", "kind": "class", "parentName": "\"my fil\\\"e\"" |}export class Bar {
-////    {| "itemName": "s", "kind": "property", "parentName": "Bar" |}public s: string;
+////export class Bar {
+////    public s: string;
 ////}
-////{| "itemName": "\"my fil\\\"e\"", "kind": "module" |}
-////{| "itemName": "x", "kind": "var", "parentName": "\"my fil\\\"e\"" |}
 ////export var x: number;
 
-test.markers().forEach((marker) => {
-    verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
-});
-
-verify.navigationBarCount(5); // external module node + 2 children + class + property
+verify.navigationBar([
+    {
+        "text": "\"my fil\\\"e\"",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "Bar",
+                "kind": "class",
+                "kindModifiers": "export"
+            },
+            {
+                "text": "x",
+                "kind": "var",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "Bar",
+        "kind": "class",
+        "kindModifiers": "export",
+        "childItems": [
+            {
+                "text": "s",
+                "kind": "property",
+                "kindModifiers": "public"
+            }
+        ],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsItemsModuleVariables.ts b/tests/cases/fourslash/navigationBarItemsItemsModuleVariables.ts
index 5429011888c..ef4022ce046 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsModuleVariables.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsModuleVariables.ts
@@ -19,12 +19,56 @@
 ////    export var z = 0;
 ////}
 goTo.marker("file1");
-verify.navigationBarContains("Module1", "module");
-verify.navigationBarContains("x", "var");
 // nothing else should show up
-verify.navigationBarCount(4); // <global>, its child, Module1, its child
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "Module1",
+                "kind": "module"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "Module1",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "x",
+                "kind": "var",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 1
+    }
+]);
 
 goTo.marker("file2");
-verify.navigationBarContains("Module1.SubModule", "module");
-verify.navigationBarContains("y", "var");
-verify.navigationBarCount(4);
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "Module1.SubModule",
+                "kind": "module"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "Module1.SubModule",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "y",
+                "kind": "var",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsMissingName1.ts b/tests/cases/fourslash/navigationBarItemsMissingName1.ts
index 59f2911f3aa..4738cc45063 100644
--- a/tests/cases/fourslash/navigationBarItemsMissingName1.ts
+++ b/tests/cases/fourslash/navigationBarItemsMissingName1.ts
@@ -1,16 +1,29 @@
 ////export function
-/////**
-//// * This is a class.
-//// */
-////{| "itemName": "C", "kind": "class", "parentName": "\"navigationBarItemsMissingName1\"" |} class C {
-////    {| "itemName": "foo", "kind": "method" |} foo() {
-////    }
+////class C {
+////    foo() {}
 ////}
 
-
-test.markers().forEach((marker) => {
-    verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
-});
-
-/// Root + 1 child, class + 1 child
-verify.navigationBarCount(4);
+verify.navigationBar([
+    {
+        "text": "\"navigationBarItemsMissingName1\"",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "C",
+                "kind": "class"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "C",
+        "kind": "class",
+        "childItems": [
+            {
+                "text": "foo",
+                "kind": "method"
+            }
+        ],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsMissingName2.ts b/tests/cases/fourslash/navigationBarItemsMissingName2.ts
index d26aa0b553d..f4a37cf1154 100644
--- a/tests/cases/fourslash/navigationBarItemsMissingName2.ts
+++ b/tests/cases/fourslash/navigationBarItemsMissingName2.ts
@@ -2,10 +2,26 @@
 //// * This is a class.
 //// */
 ////class /* But it has no name! */ {
-////    foo() {
-////    }
+////    foo() {}
 ////}
 
-
-// The class is unnamed, so its method is not included either.
-verify.navigationBarCount(2);
+// Anonymous classes are still included.
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [],
+        "indent": 0
+    },
+    {
+        "text": "default",
+        "kind": "class",
+        "childItems": [
+            {
+                "text": "foo",
+                "kind": "method"
+            }
+        ],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsModules.ts b/tests/cases/fourslash/navigationBarItemsModules.ts
index 237ec8eb275..c3b8aef08eb 100644
--- a/tests/cases/fourslash/navigationBarItemsModules.ts
+++ b/tests/cases/fourslash/navigationBarItemsModules.ts
@@ -1,49 +1,137 @@
 /// <reference path="fourslash.ts"/>
 
-////{| "itemName": "\"X.Y.Z\"", "kind": "module", "parentName": "<global>" |}
-////declare module "X.Y.Z" {
-////}
+////declare module "X.Y.Z" {}
 ////
-////{| "itemName": "'X2.Y2.Z2'", "kind": "module", "parentName": "<global>" |}
-////declare module 'X2.Y2.Z2' {
-////}
+////declare module 'X2.Y2.Z2' {}
 ////
-////{| "itemName": "A.B.C", "kind": "module", "parentName": "<global>" |}
 ////module A.B.C {
-////    {| "itemName": "x", "kind": "var", "parentName": "A.B.C" |}
 ////    export var x;
 ////}
 ////
-////{| "itemName": "A.B", "kind": "module", "parentName": "<global>" |}
 ////module A.B {
-////    {| "itemName": "y", "kind": "var", "parentName": "A.B" |}
 ////    export var y;
 ////}
 ////
-////{| "itemName": "A", "kind": "module", "parentName": "<global>" |}
 ////module A {
-////    {| "itemName": "z", "kind": "var", "parentName": "A" |}
 ////    export var z;
 ////}
 ////
-////{| "itemName": "A", "kind": "module", "parentName": "<global>" |}
 ////module A {
-////    {| "itemName": "B", "kind": "module", "parentName": "A" |}
 ////    module B {
-////        {| "itemName": "C", "kind": "module", "parentName": "B" |}
 ////        module C {
-////            {| "itemName": "x", "kind": "var", "parentName": "C" |}
 ////            declare var x;
 ////        }
 ////    }
 ////}
 
-
-test.markers().forEach((marker) => {
-    verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
-});
-
-/// We have 8 module keywords, and 4 var keywords.
-/// The declarations of A.B.C.x do not get merged, so the 4 vars are independent.
-/// The two 'A' modules, however, do get merged, so in reality we have 7 modules.
-verify.navigationBarCount(19);
+//We have 8 module keywords, and 4 var keywords.
+//The declarations of A.B.C.x do not get merged, so the 4 vars are independent.
+//The two 'A' modules, however, do get merged, so in reality we have 7 modules.
+verify.navigationBar([
+  {
+    "text": "<global>",
+    "kind": "module",
+    "childItems": [
+      {
+        "text": "A.B.C",
+        "kind": "module"
+      },
+      {
+        "text": "A.B",
+        "kind": "module"
+      },
+      {
+        "text": "A",
+        "kind": "module"
+      },
+      {
+        "text": "\"X.Y.Z\"",
+        "kind": "module",
+        "kindModifiers": "declare"
+      },
+      {
+        "text": "'X2.Y2.Z2'",
+        "kind": "module",
+        "kindModifiers": "declare"
+      }
+    ],
+    "indent": 0
+  },
+  {
+    "text": "A.B.C",
+    "kind": "module",
+    "childItems": [
+      {
+        "text": "x",
+        "kind": "var",
+        "kindModifiers": "export"
+      }
+    ],
+    "indent": 1
+  },
+  {
+    "text": "A.B",
+    "kind": "module",
+    "childItems": [
+      {
+        "text": "y",
+        "kind": "var",
+        "kindModifiers": "export"
+      }
+    ],
+    "indent": 1
+  },
+  {
+    "text": "A",
+    "kind": "module",
+    "childItems": [
+      {
+        "text": "z",
+        "kind": "var",
+        "kindModifiers": "export"
+      },
+      {
+        "text": "B",
+        "kind": "module"
+      }
+    ],
+    "indent": 1
+  },
+  {
+    "text": "B",
+    "kind": "module",
+    "childItems": [
+      {
+        "text": "C",
+        "kind": "module"
+      }
+    ],
+    "indent": 2
+  },
+  {
+    "text": "C",
+    "kind": "module",
+    "childItems": [
+      {
+        "text": "x",
+        "kind": "var",
+        "kindModifiers": "declare"
+      }
+    ],
+    "indent": 3
+  },
+  {
+    "text": "\"X.Y.Z\"",
+    "kind": "module",
+    "kindModifiers": "declare",
+    "childItems": [],
+    "indent": 1
+  },
+  {
+    "text": "'X2.Y2.Z2'",
+    "kind": "module",
+    "kindModifiers": "declare",
+    "childItems": [],
+    "indent": 1
+  }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
index 6bd3d799171..c2e43f5f7b7 100644
--- a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
+++ b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
@@ -1,31 +1,22 @@
 
-////{| "itemName": "\"Multiline\\r\\nMadness\"", "kind": "module", "parentName": "<global>" |}
 ////declare module "Multiline\r\nMadness" {
 ////}
 ////
-////{| "itemName": "\"Multiline\\\nMadness\"", "kind": "module", "parentName": "<global>" |}
 ////declare module "Multiline\
 ////Madness" {
 ////}
-////{| "itemName": "\"MultilineMadness\"", "kind": "module", "parentName": "<global>" |}
 ////declare module "MultilineMadness" {}
 ////
-////{| "itemName": "Foo", "kind": "interface", "parentName": "<global>" |}
 ////interface Foo {
-////    {| "itemName": "\"a1\\\\\\r\\nb\"", "kind": "property", "parentName": "Foo" |}
 ////    "a1\\\r\nb";
-////    {| "itemName": "\"a2\\\n    \\\n    b\"", "kind": "method", "parentName": "Foo" |}
 ////    "a2\
 ////    \
 ////    b"(): Foo;
 ////}
 ////
-////{| "itemName": "Bar", "kind": "class", "parentName": "<global>" |}
 ////class Bar implements Foo {
-////    {| "itemName": "'a1\\\\\\r\\nb'", "kind": "property", "parentName": "Bar" |}
 ////    'a1\\\r\nb': Foo;
 ////
-////    {| "itemName": "'a2\\\n    \\\n    b'", "kind": "method", "parentName": "Bar" |}
 ////    'a2\
 ////    \
 ////    b'(): Foo {
@@ -33,9 +24,86 @@
 ////    }
 ////}
 
-
-test.markers().forEach((marker) => {
-    verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
-});
-
-verify.navigationBarCount(15);
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "Bar",
+                "kind": "class"
+            },
+            {
+                "text": "Foo",
+                "kind": "interface"
+            },
+            {
+                "text": "\"Multiline\\r\\nMadness\"",
+                "kind": "module",
+                "kindModifiers": "declare"
+            },
+            {
+                "text": "\"Multiline\\\nMadness\"",
+                "kind": "module",
+                "kindModifiers": "declare"
+            },
+            {
+                "text": "\"MultilineMadness\"",
+                "kind": "module",
+                "kindModifiers": "declare"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "Bar",
+        "kind": "class",
+        "childItems": [
+            {
+                "text": "'a1\\\\\\r\\nb'",
+                "kind": "property"
+            },
+            {
+                "text": "'a2\\\n    \\\n    b'",
+                "kind": "method"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "Foo",
+        "kind": "interface",
+        "childItems": [
+            {
+                "text": "\"a1\\\\\\r\\nb\"",
+                "kind": "property"
+            },
+            {
+                "text": "\"a2\\\n    \\\n    b\"",
+                "kind": "method"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "\"Multiline\\r\\nMadness\"",
+        "kind": "module",
+        "kindModifiers": "declare",
+        "childItems": [],
+        "indent": 1
+    },
+    {
+        "text": "\"Multiline\\\nMadness\"",
+        "kind": "module",
+        "kindModifiers": "declare",
+        "childItems": [],
+        "indent": 1
+    },
+    {
+        "text": "\"MultilineMadness\"",
+        "kind": "module",
+        "kindModifiers": "declare",
+        "childItems": [],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts b/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts
index 8e1981f6101..d99d3bce9eb 100644
--- a/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts
+++ b/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts
@@ -6,10 +6,37 @@
 ////    }
 ////}
 
-verify.navigationBarContains("List", "class");
-verify.navigationBarContains("constructor", "constructor");
-verify.navigationBarContains("a", "property");
-verify.navigationBarContains("b", "property");
-
-// no other items
-verify.navigationBarCount(6);
\ No newline at end of file
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "List",
+                "kind": "class"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "List",
+        "kind": "class",
+        "childItems": [
+            {
+                "text": "constructor",
+                "kind": "constructor"
+            },
+            {
+                "text": "a",
+                "kind": "property",
+                "kindModifiers": "public"
+            },
+            {
+                "text": "b",
+                "kind": "property",
+                "kindModifiers": "public"
+            }
+        ],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsSymbols1.ts b/tests/cases/fourslash/navigationBarItemsSymbols1.ts
index 6d55812fa0e..8c565447c19 100644
--- a/tests/cases/fourslash/navigationBarItemsSymbols1.ts
+++ b/tests/cases/fourslash/navigationBarItemsSymbols1.ts
@@ -1,18 +1,40 @@
 /// <reference path="fourslash.ts"/>
 
-////{| "itemName": "C", "kind": "class", "parentName": "<global>" |}
 ////class C {
-////    {| "itemName": "[Symbol.isRegExp]", "kind": "property", "parentName": "C" |}
 ////    [Symbol.isRegExp] = 0;
-////    {| "itemName": "[Symbol.iterator]", "kind": "method", "parentName": "C" |}
 ////    [Symbol.iterator]() { }
-////    {| "itemName": "[Symbol.isConcatSpreadable]", "kind": "getter", "parentName": "C" |}
 ////    get [Symbol.isConcatSpreadable]() { }
 ////}
 
-test.markers().forEach(marker => {
-    verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
-});
-
-// 2 lack markers: <global> and its child
-verify.navigationBarCount(2 + test.markers().length);
\ No newline at end of file
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "C",
+                "kind": "class"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "C",
+        "kind": "class",
+        "childItems": [
+            {
+                "text": "[Symbol.isConcatSpreadable]",
+                "kind": "getter"
+            },
+            {
+                "text": "[Symbol.isRegExp]",
+                "kind": "property"
+            },
+            {
+                "text": "[Symbol.iterator]",
+                "kind": "method"
+            }
+        ],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsSymbols2.ts b/tests/cases/fourslash/navigationBarItemsSymbols2.ts
index 5c398f77bbd..d747b5dadaa 100644
--- a/tests/cases/fourslash/navigationBarItemsSymbols2.ts
+++ b/tests/cases/fourslash/navigationBarItemsSymbols2.ts
@@ -1,16 +1,35 @@
 /// <reference path="fourslash.ts"/>
 
-////{| "itemName": "I", "kind": "interface", "parentName": "<global>" |}
 ////interface I {
-////    {| "itemName": "[Symbol.isRegExp]", "kind": "property", "parentName": "I" |}
 ////    [Symbol.isRegExp]: string;
-////    {| "itemName": "[Symbol.iterator]", "kind": "method", "parentName": "I" |}
 ////    [Symbol.iterator](): string;
 ////}
 
-test.markers().forEach(marker => {
-    verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
-});
-
-// 2 are not marked: <global> and its child.
-verify.navigationBarCount(2 + test.markers().length);
\ No newline at end of file
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "I",
+                "kind": "interface"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "I",
+        "kind": "interface",
+        "childItems": [
+            {
+                "text": "[Symbol.isRegExp]",
+                "kind": "property"
+            },
+            {
+                "text": "[Symbol.iterator]",
+                "kind": "method"
+            }
+        ],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsSymbols3.ts b/tests/cases/fourslash/navigationBarItemsSymbols3.ts
index 23451588ecd..29ff9f277a3 100644
--- a/tests/cases/fourslash/navigationBarItemsSymbols3.ts
+++ b/tests/cases/fourslash/navigationBarItemsSymbols3.ts
@@ -1,13 +1,26 @@
 /// <reference path="fourslash.ts"/>
 
-////{| "itemName": "E", "kind": "enum", "parentName": "<global>" |}
 ////enum E {
 ////    // No nav bar entry for this
 ////    [Symbol.isRegExp] = 0
 ////}
 
-test.markers().forEach(marker => {
-    verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
-});
-
-verify.navigationBarCount(3); // <global> and E appearing both toplevel and under <global>
\ No newline at end of file
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "E",
+                "kind": "enum"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "E",
+        "kind": "enum",
+        "childItems": [],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsTypeAlias.ts b/tests/cases/fourslash/navigationBarItemsTypeAlias.ts
index 50923256533..8a422651bf3 100644
--- a/tests/cases/fourslash/navigationBarItemsTypeAlias.ts
+++ b/tests/cases/fourslash/navigationBarItemsTypeAlias.ts
@@ -2,5 +2,17 @@
 
 ////type T = number | string;
 
-verify.navigationBarCount(1);
-verify.navigationBarContains("T", "type");
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [],
+        "indent": 0
+    },
+    {
+        "text": "T",
+        "kind": "type",
+        "childItems": [],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/server/navbar01.ts b/tests/cases/fourslash/server/navbar01.ts
index fea424317db..ed8ed2d8563 100644
--- a/tests/cases/fourslash/server/navbar01.ts
+++ b/tests/cases/fourslash/server/navbar01.ts
@@ -1,52 +1,171 @@
 /// <reference path="../fourslash.ts"/>
 
 ////// Interface
-////{| "itemName": "IPoint", "kind": "interface", "parentName": "<global>" |}interface IPoint {
-////    {| "itemName": "getDist", "kind": "method", "parentName": "IPoint" |}getDist(): number;
-////    {| "itemName": "new()", "kind": "construct", "parentName": "IPoint" |}new(): IPoint;
-////    {| "itemName": "()", "kind": "call", "parentName": "IPoint" |}(): any;
-////    {| "itemName": "[]", "kind": "index", "parentName": "IPoint" |}[x:string]: number;
-////    {| "itemName": "prop", "kind": "property", "parentName": "IPoint" |}prop: string;
+////interface IPoint {
+////    getDist(): number;
+////    new(): IPoint;
+////    (): any;
+////    [x:string]: number;
+////    prop: string;
 ////}
 ////
 /////// Module
-////{| "itemName": "Shapes", "kind": "module", "parentName": "<global>" |}module Shapes {
-////
+////module Shapes {
 ////    // Class
-////    {| "itemName": "Point", "kind": "class", "parentName": "Shapes" |}export class Point implements IPoint {
-////        {| "itemName": "constructor", "kind": "constructor", "parentName": "Point" |}constructor (public x: number, public y: number) { }
+////    export class Point implements IPoint {
+////        constructor (public x: number, public y: number) { }
 ////
 ////        // Instance member
-////        {| "itemName": "getDist", "kind": "method", "parentName": "Point" |}getDist() { return Math.sqrt(this.x * this.x + this.y * this.y); }
+////        getDist() { return Math.sqrt(this.x * this.x + this.y * this.y); }
 ////
 ////        // Getter
-////        {| "itemName": "value", "kind": "getter", "parentName": "Point" |}get value(): number { return 0; }
+////        get value(): number { return 0; }
 ////
 ////        // Setter
-////        {| "itemName": "value", "kind": "setter", "parentName": "Point" |}set value(newValue: number) { return; }
+////        set value(newValue: number) { return; }
 ////
 ////        // Static member
-////        {| "itemName": "origin", "kind": "property", "parentName": "Point" |}static origin = new Point(0, 0);
+////        static origin = new Point(0, 0);
 ////
 ////        // Static method
-////        {| "itemName": "getOrigin", "kind": "method", "parentName": "Point" |}private static getOrigin() { return Point.origin;}
+////        private static getOrigin() { return Point.origin;}
 ////    }
 ////
-////    {| "itemName": "Values", "kind": "enum", "parentName": "Shapes" |}enum Values {
-////        value1,
-////        {| "itemName": "value2", "kind": "property", "parentName": "Values" |}value2,
-////        value3,
-////    }
+////    enum Values { value1, value2, value3 }
 ////}
 ////
 ////// Local variables
-////{| "itemName": "p", "kind": "var", "parentName": "" |}var p: IPoint = new Shapes.Point(3, 4);
-////{| "itemName": "dist", "kind": "var", "parentName": "" |}var dist = p.getDist();
+////var p: IPoint = new Shapes.Point(3, 4);
+////var dist = p.getDist();
 
-test.markers().forEach((marker) => {
-    if (marker.data) {
-        verify.navigationBarContains(marker.data.itemName, marker.data.kind, marker.fileName, marker.data.parentName);
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "dist",
+                "kind": "var"
+            },
+            {
+                "text": "IPoint",
+                "kind": "interface"
+            },
+            {
+                "text": "p",
+                "kind": "var"
+            },
+            {
+                "text": "Shapes",
+                "kind": "module"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "IPoint",
+        "kind": "interface",
+        "childItems": [
+            {
+                "text": "()",
+                "kind": "call"
+            },
+            {
+                "text": "new()",
+                "kind": "construct"
+            },
+            {
+                "text": "[]",
+                "kind": "index"
+            },
+            {
+                "text": "getDist",
+                "kind": "method"
+            },
+            {
+                "text": "prop",
+                "kind": "property"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "Shapes",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "Point",
+                "kind": "class",
+                "kindModifiers": "export"
+            },
+            {
+                "text": "Values",
+                "kind": "enum"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "Point",
+        "kind": "class",
+        "kindModifiers": "export",
+        "childItems": [
+            {
+                "text": "constructor",
+                "kind": "constructor"
+            },
+            {
+                "text": "getDist",
+                "kind": "method"
+            },
+            {
+                "text": "getOrigin",
+                "kind": "method",
+                "kindModifiers": "private,static"
+            },
+            {
+                "text": "origin",
+                "kind": "property",
+                "kindModifiers": "static"
+            },
+            {
+                "text": "value",
+                "kind": "getter"
+            },
+            {
+                "text": "value",
+                "kind": "setter"
+            },
+            {
+                "text": "x",
+                "kind": "property",
+                "kindModifiers": "public"
+            },
+            {
+                "text": "y",
+                "kind": "property",
+                "kindModifiers": "public"
+            }
+        ],
+        "indent": 0
+    },
+    {
+        "text": "Values",
+        "kind": "enum",
+        "childItems": [
+            {
+                "text": "value1",
+                "kind": "property"
+            },
+            {
+                "text": "value2",
+                "kind": "property"
+            },
+            {
+                "text": "value3",
+                "kind": "property"
+            }
+        ],
+        "indent": 0
     }
-});
-
-verify.navigationBarCount(27);
+]);
diff --git a/tests/cases/fourslash/shims-pp/getNavigationBarItems.ts b/tests/cases/fourslash/shims-pp/getNavigationBarItems.ts
index a2cdb80baef..fe852e03a28 100644
--- a/tests/cases/fourslash/shims-pp/getNavigationBarItems.ts
+++ b/tests/cases/fourslash/shims-pp/getNavigationBarItems.ts
@@ -2,12 +2,16 @@
 
 //// {| "itemName": "c", "kind": "const", "parentName": "" |}const c = 0;
 
-test.markers().forEach(marker => {
-    verify.navigationBarContains(
-        marker.data.itemName,
-        marker.data.kind,
-        marker.fileName,
-        marker.data.parentName,
-        marker.data.isAdditionalRange,
-        marker.position);
-});
\ No newline at end of file
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "c",
+                "kind": "const"
+            }
+        ],
+        "indent": 0
+    }
+]);
diff --git a/tests/cases/fourslash/shims/getNavigationBarItems.ts b/tests/cases/fourslash/shims/getNavigationBarItems.ts
index a2cdb80baef..fe852e03a28 100644
--- a/tests/cases/fourslash/shims/getNavigationBarItems.ts
+++ b/tests/cases/fourslash/shims/getNavigationBarItems.ts
@@ -2,12 +2,16 @@
 
 //// {| "itemName": "c", "kind": "const", "parentName": "" |}const c = 0;
 
-test.markers().forEach(marker => {
-    verify.navigationBarContains(
-        marker.data.itemName,
-        marker.data.kind,
-        marker.fileName,
-        marker.data.parentName,
-        marker.data.isAdditionalRange,
-        marker.position);
-});
\ No newline at end of file
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "c",
+                "kind": "const"
+            }
+        ],
+        "indent": 0
+    }
+]);

From 12914eacc5300c5cd9a0aa44df4bef85591288be Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 26 May 2016 09:01:56 -0700
Subject: [PATCH 106/332] Fix lint errors

---
 src/harness/fourslash.ts | 33 +++++++++++++++++++--------------
 1 file changed, 19 insertions(+), 14 deletions(-)

diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index c33c9107ad7..53aaa8c7d6e 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -1963,7 +1963,7 @@ namespace FourSlash {
             let items = this.languageService.getNavigationBarItems(this.activeFile.fileName);
             items = this.simplifyNavigationBar(items);
             if (JSON.stringify(items) !== JSON.stringify(json)) {
-                this.raiseError(`verifyNavigationBar failed - expected: ${JSON.stringify(json, undefined, 2)}, got: ${JSON.stringify(items, undefined, 2)}`)
+                this.raiseError(`verifyNavigationBar failed - expected: ${JSON.stringify(json, undefined, 2)}, got: ${JSON.stringify(items, undefined, 2)}`);
             }
         }
 
@@ -1971,30 +1971,35 @@ namespace FourSlash {
         private simplifyNavigationBar(items: ts.NavigationBarItem[]): any {
             return items.map(item => {
                 item = ts.clone(item);
-                if (item.kindModifiers === "")
+                if (item.kindModifiers === "") {
                     delete item.kindModifiers;
+                }
+                // We won't check this.
                 delete item.spans;
                 item.childItems = item.childItems.map(child => {
                     child = ts.clone(child);
-                    ts.Debug.assert(child.childItems.length === 0);
-                    ts.Debug.assert(child.indent === 0);
-                    ts.Debug.assert(child.bolded === false);
-                    ts.Debug.assert(child.grayed === false);
-                    delete child.childItems;
-                    delete child.indent;
-                    delete child.bolded;
-                    delete child.grayed;
                     delete child.spans;
-                    if (child.kindModifiers === "")
+                    ts.Debug.assert(child.childItems.length === 0);
+                    delete child.childItems;
+                    ts.Debug.assert(child.indent === 0);
+                    delete child.indent;
+                    ts.Debug.assert(child.bolded === false);
+                    delete child.bolded;
+                    ts.Debug.assert(child.grayed === false);
+                    delete child.grayed;
+                    if (child.kindModifiers === "") {
                         delete child.kindModifiers;
+                    }
                     return child;
                 });
-                if (item.bolded === false)
+                if (item.bolded === false) {
                     delete item.bolded;
-                if (item.grayed === false)
+                }
+                if (item.grayed === false) {
                     delete item.grayed;
+                }
                 return item;
-            })
+            });
         }
 
         public printNavigationItems(searchValue: string) {

From cc5b103b2ee59a61241cd8cc942497f048f7012b Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 26 May 2016 09:45:40 -0700
Subject: [PATCH 107/332] Fix localeCompare differences in node versions

---
 src/services/navigationBar.ts | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index bcf0726ffd5..1c3dcb0a585 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -140,7 +140,7 @@ namespace ts.NavigationBar {
         function sortNodes(nodes: Node[]): Node[] {
             return nodes.slice(0).sort((n1: Declaration, n2: Declaration) => {
                 if (n1.name && n2.name) {
-                    return getPropertyNameForPropertyNameNode(n1.name).localeCompare(getPropertyNameForPropertyNameNode(n2.name));
+                    return localeCompareFix(getPropertyNameForPropertyNameNode(n1.name), getPropertyNameForPropertyNameNode(n2.name));
                 }
                 else if (n1.name) {
                     return 1;
@@ -152,6 +152,16 @@ namespace ts.NavigationBar {
                     return n1.kind - n2.kind;
                 }
             });
+
+            // node 0.10 treats "a" as greater than "B".
+            // For consistency, sort alphabetically, falling back to which is lower-case.
+            function localeCompareFix(a: string, b: string) {
+                const cmp = a.toLowerCase().localeCompare(b.toLowerCase());
+                if (cmp !== 0)
+                    return cmp;
+                // Return the *opposite* of the `<` operator, which works the same in node 0.10 and 6.0.
+                return a < b ? 1 : a > b ? -1 : 0;
+            }
         }
 
         function addTopLevelNodes(nodes: Node[], topLevelNodes: Node[]): void {

From f012159220edaa716bf39c297b334486c687d354 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 26 May 2016 09:59:45 -0700
Subject: [PATCH 108/332] Revert previous commit

---
 src/services/navigationBar.ts | 12 +-----------
 1 file changed, 1 insertion(+), 11 deletions(-)

diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index 1c3dcb0a585..bcf0726ffd5 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -140,7 +140,7 @@ namespace ts.NavigationBar {
         function sortNodes(nodes: Node[]): Node[] {
             return nodes.slice(0).sort((n1: Declaration, n2: Declaration) => {
                 if (n1.name && n2.name) {
-                    return localeCompareFix(getPropertyNameForPropertyNameNode(n1.name), getPropertyNameForPropertyNameNode(n2.name));
+                    return getPropertyNameForPropertyNameNode(n1.name).localeCompare(getPropertyNameForPropertyNameNode(n2.name));
                 }
                 else if (n1.name) {
                     return 1;
@@ -152,16 +152,6 @@ namespace ts.NavigationBar {
                     return n1.kind - n2.kind;
                 }
             });
-
-            // node 0.10 treats "a" as greater than "B".
-            // For consistency, sort alphabetically, falling back to which is lower-case.
-            function localeCompareFix(a: string, b: string) {
-                const cmp = a.toLowerCase().localeCompare(b.toLowerCase());
-                if (cmp !== 0)
-                    return cmp;
-                // Return the *opposite* of the `<` operator, which works the same in node 0.10 and 6.0.
-                return a < b ? 1 : a > b ? -1 : 0;
-            }
         }
 
         function addTopLevelNodes(nodes: Node[], topLevelNodes: Node[]): void {

From aa5c51c51677600f7ac1960f7d953864b70275bc Mon Sep 17 00:00:00 2001
From: Richard Knoll <riknoll@microsoft.com>
Date: Thu, 26 May 2016 10:17:43 -0700
Subject: [PATCH 109/332] Fixing lint errors

---
 src/compiler/sys.ts                            | 4 ++--
 tests/cases/unittests/cachingInServerLSHost.ts | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index bdbe04e9044..de7d24b2296 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -425,10 +425,10 @@ namespace ts {
             function directoryExists(path: string): boolean {
                 return fileSystemEntryExists(path, FileSystemEntryKind.Directory);
             }
-	    
+
             function getDirectories(path: string): string[] {
                 return filter<string>(_fs.readdirSync(path), p => fileSystemEntryExists(combinePaths(path, p), FileSystemEntryKind.Directory));
-            }	    
+            }
 
             return {
                 args: process.argv.slice(2),
diff --git a/tests/cases/unittests/cachingInServerLSHost.ts b/tests/cases/unittests/cachingInServerLSHost.ts
index b58ca9898bc..65f3cb1ed9b 100644
--- a/tests/cases/unittests/cachingInServerLSHost.ts
+++ b/tests/cases/unittests/cachingInServerLSHost.ts
@@ -82,7 +82,7 @@ namespace ts {
         const projectService = new server.ProjectService(serverHost, logger);
         const rootScriptInfo = projectService.openFile(rootFile, /* openedByClient */true);
         const project = projectService.createInferredProject(rootScriptInfo);
-        project.setProjectOptions( {files: [rootScriptInfo.fileName], compilerOptions: {module: ts.ModuleKind.AMD} } ); 
+        project.setProjectOptions( {files: [rootScriptInfo.fileName], compilerOptions: {module: ts.ModuleKind.AMD} } );
         return {
             project,
             rootScriptInfo
@@ -145,7 +145,7 @@ namespace ts {
                 catch (e) {
                     assert.isTrue(e.message.indexOf(`Could not find file: '${imported.name}'.`) === 0);
                 }
-                
+
                 assert.isTrue(fileExistsIsCalled);
             }
             {

From 58d69cda6447b626ad269c946f2f7ec8e8aba758 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 26 May 2016 10:03:07 -0700
Subject: [PATCH 110/332] Fix localeCompare differences between node versions

node 6.2.0: "a".localeCompare("A") is -1.
node 0.10.45: "a".localeCompare("A") is 32.
---
 src/services/navigationBar.ts | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index f6f7b741a56..8db95584eb4 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -134,7 +134,7 @@ namespace ts.NavigationBar {
         function sortNodes(nodes: Node[]): Node[] {
             return nodes.slice(0).sort((n1: Declaration, n2: Declaration) => {
                 if (n1.name && n2.name) {
-                    return getPropertyNameForPropertyNameNode(n1.name).localeCompare(getPropertyNameForPropertyNameNode(n2.name));
+                    return localeCompareFix(getPropertyNameForPropertyNameNode(n1.name), getPropertyNameForPropertyNameNode(n2.name));
                 }
                 else if (n1.name) {
                     return 1;
@@ -146,6 +146,16 @@ namespace ts.NavigationBar {
                     return n1.kind - n2.kind;
                 }
             });
+
+            // node 0.10 treats "a" as greater than "B".
+            // For consistency, sort alphabetically, falling back to which is lower-case.
+            function localeCompareFix(a: string, b: string) {
+                const cmp = a.toLowerCase().localeCompare(b.toLowerCase());
+                if (cmp !== 0)
+                    return cmp;
+                // Return the *opposite* of the `<` operator, which works the same in node 0.10 and 6.0.
+                return a < b ? 1 : a > b ? -1 : 0;
+            }
         }
 
         function addTopLevelNodes(nodes: Node[], topLevelNodes: Node[]): void {

From fdd5c06b630287c03bbd0c5508eb96cea4834240 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 26 May 2016 12:18:19 -0700
Subject: [PATCH 111/332] Include type aliases as childItems in navigation bar

---
 src/services/navigationBar.ts                        | 3 +++
 tests/cases/fourslash/navigationBarItemsTypeAlias.ts | 3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index bcf0726ffd5..0cb431de668 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -104,6 +104,7 @@ namespace ts.NavigationBar {
                     case SyntaxKind.ImportEqualsDeclaration:
                     case SyntaxKind.ImportSpecifier:
                     case SyntaxKind.ExportSpecifier:
+                    case SyntaxKind.TypeAliasDeclaration:
                         childNodes.push(node);
                         break;
                 }
@@ -326,6 +327,8 @@ namespace ts.NavigationBar {
                 case SyntaxKind.InterfaceDeclaration:
                     return createItem(node, getTextOfNode((<InterfaceDeclaration>node).name), ts.ScriptElementKind.interfaceElement);
 
+                case SyntaxKind.TypeAliasDeclaration:
+                    return createItem(node, getTextOfNode((<TypeAliasDeclaration>node).name), ts.ScriptElementKind.typeElement);
 
                 case SyntaxKind.CallSignature:
                     return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
diff --git a/tests/cases/fourslash/navigationBarItemsTypeAlias.ts b/tests/cases/fourslash/navigationBarItemsTypeAlias.ts
index 50923256533..448a959380f 100644
--- a/tests/cases/fourslash/navigationBarItemsTypeAlias.ts
+++ b/tests/cases/fourslash/navigationBarItemsTypeAlias.ts
@@ -2,5 +2,6 @@
 
 ////type T = number | string;
 
-verify.navigationBarCount(1);
+verify.navigationBarCount(3);
 verify.navigationBarContains("T", "type");
+verify.navigationBarChildItem("<global>", "T", "type");

From abfcdd2cfdbc7abc149496c43f49e43e910eb8ea Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Thu, 26 May 2016 12:42:35 -0700
Subject: [PATCH 112/332] Symbol for property assignments in Salsa/ES6
 constructors

Previously no symbol at all was created, meaning that Salsa didn't track
properties in ES6 code.
---
 src/compiler/binder.ts                         | 18 +++++++++++++-----
 .../cases/fourslash/renameJsThisProperty03.ts  | 14 ++++++++++++++
 .../cases/fourslash/renameJsThisProperty04.ts  | 14 ++++++++++++++
 3 files changed, 41 insertions(+), 5 deletions(-)
 create mode 100644 tests/cases/fourslash/renameJsThisProperty03.ts
 create mode 100644 tests/cases/fourslash/renameJsThisProperty04.ts

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 19fdf79a24a..6f0f1ac7863 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -1880,12 +1880,20 @@ namespace ts {
         }
 
         function bindThisPropertyAssignment(node: BinaryExpression) {
-            // Declare a 'member' in case it turns out the container was an ES5 class
-            if (container.kind === SyntaxKind.FunctionExpression || container.kind === SyntaxKind.FunctionDeclaration) {
-                container.symbol.members = container.symbol.members || {};
-                // It's acceptable for multiple 'this' assignments of the same identifier to occur
-                declareSymbol(container.symbol.members, container.symbol, node, SymbolFlags.Property, SymbolFlags.PropertyExcludes & ~SymbolFlags.Property);
+            // Declare a 'member' in case it turns out the container was an ES5 class or ES6 constructor
+            let assignee: Node;
+            if (container.kind === SyntaxKind.FunctionDeclaration || container.kind === SyntaxKind.FunctionDeclaration) {
+                assignee = container;
             }
+            else if (container.kind === SyntaxKind.Constructor) {
+                assignee = container.parent;
+            }
+            else {
+                return;
+            }
+            assignee.symbol.members = assignee.symbol.members || {};
+            // It's acceptable for multiple 'this' assignments of the same identifier to occur
+            declareSymbol(assignee.symbol.members, assignee.symbol, node, SymbolFlags.Property, SymbolFlags.PropertyExcludes & ~SymbolFlags.Property);
         }
 
         function bindPrototypePropertyAssignment(node: BinaryExpression) {
diff --git a/tests/cases/fourslash/renameJsThisProperty03.ts b/tests/cases/fourslash/renameJsThisProperty03.ts
new file mode 100644
index 00000000000..f2176538578
--- /dev/null
+++ b/tests/cases/fourslash/renameJsThisProperty03.ts
@@ -0,0 +1,14 @@
+/// <reference path='fourslash.ts'/>
+
+// @allowJs: true
+// @Filename: a.js
+////class C {
+////  constructor(y) {
+////    this./**/[|x|] = y;
+////  }
+////}
+////var t = new C(12);
+////t.[|x|] = 11;
+
+goTo.marker();
+verify.renameLocations( /*findInStrings*/ false, /*findInComments*/ false);
diff --git a/tests/cases/fourslash/renameJsThisProperty04.ts b/tests/cases/fourslash/renameJsThisProperty04.ts
new file mode 100644
index 00000000000..e307022c66f
--- /dev/null
+++ b/tests/cases/fourslash/renameJsThisProperty04.ts
@@ -0,0 +1,14 @@
+/// <reference path='fourslash.ts'/>
+
+// @allowJs: true
+// @Filename: a.js
+////class C {
+////  constructor(y) {
+////    this.[|x|] = y;
+////  }
+////}
+////var t = new C(12);
+////t./**/[|x|] = 11;
+
+goTo.marker();
+verify.renameLocations( /*findInStrings*/ false, /*findInComments*/ false);

From 5e49b57fea08e913b222ec7a30dd24f7706173af Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Thu, 26 May 2016 13:00:38 -0700
Subject: [PATCH 113/332] Fix #8834: exclude paramters and variables from flag
 checks

---
 src/compiler/checker.ts                          |  6 ++++++
 .../optionalParamterAndVariableDeclaration.js    | 15 +++++++++++++++
 ...ptionalParamterAndVariableDeclaration.symbols | 13 +++++++++++++
 .../optionalParamterAndVariableDeclaration.types | 16 ++++++++++++++++
 ...nalParamterAndVariableDeclaration2.errors.txt | 13 +++++++++++++
 .../optionalParamterAndVariableDeclaration2.js   | 16 ++++++++++++++++
 .../optionalParamterAndVariableDeclaration.ts    |  5 +++++
 .../optionalParamterAndVariableDeclaration2.ts   |  7 +++++++
 8 files changed, 91 insertions(+)
 create mode 100644 tests/baselines/reference/optionalParamterAndVariableDeclaration.js
 create mode 100644 tests/baselines/reference/optionalParamterAndVariableDeclaration.symbols
 create mode 100644 tests/baselines/reference/optionalParamterAndVariableDeclaration.types
 create mode 100644 tests/baselines/reference/optionalParamterAndVariableDeclaration2.errors.txt
 create mode 100644 tests/baselines/reference/optionalParamterAndVariableDeclaration2.js
 create mode 100644 tests/cases/compiler/optionalParamterAndVariableDeclaration.ts
 create mode 100644 tests/cases/compiler/optionalParamterAndVariableDeclaration2.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 5a7c6fa29e5..db996d26131 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -14527,6 +14527,12 @@ namespace ts {
         }
 
         function areDeclarationFlagsIdentical(left: Declaration, right: Declaration) {
+            if ((left.kind === SyntaxKind.Parameter && right.kind === SyntaxKind.VariableDeclaration) ||
+                (left.kind === SyntaxKind.VariableDeclaration && right.kind === SyntaxKind.Parameter)) {
+                // Diffrences in optionality between paramters and variables are allowed.
+                return true;
+            }
+
             if (hasQuestionToken(left) !== hasQuestionToken(right)) {
                 return false;
             }
diff --git a/tests/baselines/reference/optionalParamterAndVariableDeclaration.js b/tests/baselines/reference/optionalParamterAndVariableDeclaration.js
new file mode 100644
index 00000000000..ae672b15d54
--- /dev/null
+++ b/tests/baselines/reference/optionalParamterAndVariableDeclaration.js
@@ -0,0 +1,15 @@
+//// [optionalParamterAndVariableDeclaration.ts]
+class C {
+    constructor(options?: number) {
+        var options = (options || 0);
+    }
+}
+
+
+//// [optionalParamterAndVariableDeclaration.js]
+var C = (function () {
+    function C(options) {
+        var options = (options || 0);
+    }
+    return C;
+}());
diff --git a/tests/baselines/reference/optionalParamterAndVariableDeclaration.symbols b/tests/baselines/reference/optionalParamterAndVariableDeclaration.symbols
new file mode 100644
index 00000000000..0a761182e02
--- /dev/null
+++ b/tests/baselines/reference/optionalParamterAndVariableDeclaration.symbols
@@ -0,0 +1,13 @@
+=== tests/cases/compiler/optionalParamterAndVariableDeclaration.ts ===
+class C {
+>C : Symbol(C, Decl(optionalParamterAndVariableDeclaration.ts, 0, 0))
+
+    constructor(options?: number) {
+>options : Symbol(options, Decl(optionalParamterAndVariableDeclaration.ts, 1, 16), Decl(optionalParamterAndVariableDeclaration.ts, 2, 11))
+
+        var options = (options || 0);
+>options : Symbol(options, Decl(optionalParamterAndVariableDeclaration.ts, 1, 16), Decl(optionalParamterAndVariableDeclaration.ts, 2, 11))
+>options : Symbol(options, Decl(optionalParamterAndVariableDeclaration.ts, 1, 16), Decl(optionalParamterAndVariableDeclaration.ts, 2, 11))
+    }
+}
+
diff --git a/tests/baselines/reference/optionalParamterAndVariableDeclaration.types b/tests/baselines/reference/optionalParamterAndVariableDeclaration.types
new file mode 100644
index 00000000000..36c74bf00b9
--- /dev/null
+++ b/tests/baselines/reference/optionalParamterAndVariableDeclaration.types
@@ -0,0 +1,16 @@
+=== tests/cases/compiler/optionalParamterAndVariableDeclaration.ts ===
+class C {
+>C : C
+
+    constructor(options?: number) {
+>options : number
+
+        var options = (options || 0);
+>options : number
+>(options || 0) : number
+>options || 0 : number
+>options : number
+>0 : number
+    }
+}
+
diff --git a/tests/baselines/reference/optionalParamterAndVariableDeclaration2.errors.txt b/tests/baselines/reference/optionalParamterAndVariableDeclaration2.errors.txt
new file mode 100644
index 00000000000..0d309327531
--- /dev/null
+++ b/tests/baselines/reference/optionalParamterAndVariableDeclaration2.errors.txt
@@ -0,0 +1,13 @@
+tests/cases/compiler/optionalParamterAndVariableDeclaration2.ts(4,13): error TS2403: Subsequent variable declarations must have the same type.  Variable 'options' must be of type 'number | undefined', but here has type 'number'.
+
+
+==== tests/cases/compiler/optionalParamterAndVariableDeclaration2.ts (1 errors) ====
+    
+    class C {
+        constructor(options?: number) {
+            var options = (options || 0);
+                ~~~~~~~
+!!! error TS2403: Subsequent variable declarations must have the same type.  Variable 'options' must be of type 'number | undefined', but here has type 'number'.
+        }
+    }
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/optionalParamterAndVariableDeclaration2.js b/tests/baselines/reference/optionalParamterAndVariableDeclaration2.js
new file mode 100644
index 00000000000..a4ffc9f382d
--- /dev/null
+++ b/tests/baselines/reference/optionalParamterAndVariableDeclaration2.js
@@ -0,0 +1,16 @@
+//// [optionalParamterAndVariableDeclaration2.ts]
+
+class C {
+    constructor(options?: number) {
+        var options = (options || 0);
+    }
+}
+
+
+//// [optionalParamterAndVariableDeclaration2.js]
+var C = (function () {
+    function C(options) {
+        var options = (options || 0);
+    }
+    return C;
+}());
diff --git a/tests/cases/compiler/optionalParamterAndVariableDeclaration.ts b/tests/cases/compiler/optionalParamterAndVariableDeclaration.ts
new file mode 100644
index 00000000000..d9c1d407dca
--- /dev/null
+++ b/tests/cases/compiler/optionalParamterAndVariableDeclaration.ts
@@ -0,0 +1,5 @@
+class C {
+    constructor(options?: number) {
+        var options = (options || 0);
+    }
+}
diff --git a/tests/cases/compiler/optionalParamterAndVariableDeclaration2.ts b/tests/cases/compiler/optionalParamterAndVariableDeclaration2.ts
new file mode 100644
index 00000000000..7bdb0ab89c2
--- /dev/null
+++ b/tests/cases/compiler/optionalParamterAndVariableDeclaration2.ts
@@ -0,0 +1,7 @@
+// @strictNullChecks: true
+
+class C {
+    constructor(options?: number) {
+        var options = (options || 0);
+    }
+}

From 04d6e9167f031e045958010f7705d7377c77597a Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Thu, 26 May 2016 14:11:06 -0700
Subject: [PATCH 114/332] Fix typos

---
 src/compiler/checker.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index db996d26131..2e701bd56bf 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -14529,7 +14529,7 @@ namespace ts {
         function areDeclarationFlagsIdentical(left: Declaration, right: Declaration) {
             if ((left.kind === SyntaxKind.Parameter && right.kind === SyntaxKind.VariableDeclaration) ||
                 (left.kind === SyntaxKind.VariableDeclaration && right.kind === SyntaxKind.Parameter)) {
-                // Diffrences in optionality between paramters and variables are allowed.
+                // Differences in optionality between parameters and variables are allowed.
                 return true;
             }
 

From 81ce532cde1f4ffd88e8c507b19432712723401f Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Wed, 25 May 2016 23:05:20 -0700
Subject: [PATCH 115/332] Change how typedef tag is parsed

---
 src/compiler/binder.ts |   7 +-
 src/compiler/parser.ts | 215 ++++++++++++++++++-----------------------
 src/compiler/types.ts  |  13 +--
 3 files changed, 103 insertions(+), 132 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 9b421ed34cb..377c5d3f465 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -1702,8 +1702,9 @@ namespace ts {
                 case SyntaxKind.PropertyDeclaration:
                 case SyntaxKind.PropertySignature:
                 case SyntaxKind.JSDocRecordMember:
-                case SyntaxKind.JSDocPropertyTag:
                     return bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.Property | ((<PropertyDeclaration>node).questionToken ? SymbolFlags.Optional : SymbolFlags.None), SymbolFlags.PropertyExcludes);
+                case SyntaxKind.JSDocPropertyTag:
+                    return bindJSDocProperty(<JSDocPropertyTag>node);
                 case SyntaxKind.PropertyAssignment:
                 case SyntaxKind.ShorthandPropertyAssignment:
                     return bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.Property, SymbolFlags.PropertyExcludes);
@@ -2085,6 +2086,10 @@ namespace ts {
                 : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
         }
 
+        function bindJSDocProperty(node: JSDocPropertyTag) {
+            return declareSymbolAndAddToSymbolTable(node, SymbolFlags.Property, SymbolFlags.PropertyExcludes);
+        }
+
         // reachability checks
 
         function shouldReportErrorOnModuleDeclaration(node: ModuleDeclaration): boolean {
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 9c26fdeb179..07509d0afcc 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -406,7 +406,7 @@ namespace ts {
                     visitNode(cbNode, (<JSDocTypedefTag>node).name) ||
                     visitNode(cbNode, (<JSDocTypedefTag>node).type);
             case SyntaxKind.JSDocTypeLiteral:
-                return visitNodes(cbNodes, (<JSDocTypeLiteral>node).members);
+                return visitNodes(cbNodes, (<JSDocTypeLiteral>node).jsDocPropertyTags);
             case SyntaxKind.JSDocPropertyTag:
                 return visitNode(cbNode, (<JSDocPropertyTag>node).typeExpression) ||
                     visitNode(cbNode, (<JSDocPropertyTag>node).name);
@@ -4113,9 +4113,9 @@ namespace ts {
             const isAsync = !!(node.flags & NodeFlags.Async);
             node.name =
                 isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
-                isGenerator ? doInYieldContext(parseOptionalIdentifier) :
-                isAsync ? doInAwaitContext(parseOptionalIdentifier) :
-                parseOptionalIdentifier();
+                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
+                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
+                            parseOptionalIdentifier();
 
             fillSignature(SyntaxKind.ColonToken, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
             node.body = parseFunctionBlock(/*allowYield*/ isGenerator, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
@@ -6066,9 +6066,6 @@ namespace ts {
                 Debug.assert(end <= content.length);
 
                 let tags: NodeArray<JSDocTag>;
-                let currentParentJSDocTag: JSDocParentTag;
-                let currentParentJSDocTagEnd: number;
-
                 let result: JSDocComment;
 
                 // Check for /** (JSDoc opening part)
@@ -6125,10 +6122,6 @@ namespace ts {
                             nextJSDocToken();
                         }
 
-                        if (currentParentJSDocTag) {
-                            finishCurrentParentTag();
-                        }
-
                         result = createJSDocComment();
 
                     });
@@ -6152,40 +6145,6 @@ namespace ts {
                     }
                 }
 
-                function finishCurrentParentTag(): void {
-                    if (!currentParentJSDocTag) {
-                        return;
-                    }
-
-                    if (currentParentJSDocTag.kind === SyntaxKind.JSDocTypedefTag) {
-                        const typedefTag = <JSDocTypedefTag>currentParentJSDocTag;
-                        if (typedefTag.jsDocTypeTag) {
-                            if (typedefTag.jsDocTypeTag.typeExpression.type.kind === SyntaxKind.JSDocTypeReference) {
-                                const typeTagtype = <JSDocTypeReference>typedefTag.jsDocTypeTag.typeExpression.type;
-                                if ((typeTagtype.name.kind !== SyntaxKind.Identifier) ||
-                                    (<Identifier>typeTagtype.name).text !== "Object") {
-                                    typedefTag.type = typedefTag.jsDocTypeTag.typeExpression.type;
-                                }
-                            }
-                            else {
-                                typedefTag.type = typedefTag.jsDocTypeTag.typeExpression.type;
-                            }
-                        }
-                        if (!typedefTag.type && typedefTag.jsDocPropertyTags && typedefTag.jsDocPropertyTags.length > 0) {
-                            const pos = typedefTag.jsDocPropertyTags[0].pos;
-                            const end = typedefTag.jsDocPropertyTags[typedefTag.jsDocPropertyTags.length - 1].end;
-                            const jsdocTypeLiteral = <JSDocTypeLiteral>createNode(SyntaxKind.JSDocTypeLiteral, pos);
-                            jsdocTypeLiteral.members = <NodeArray<JSDocPropertyTag>>[];
-                            addRange(jsdocTypeLiteral.members, typedefTag.jsDocPropertyTags);
-                            typedefTag.type = finishNode(jsdocTypeLiteral, end);
-                        }
-                    }
-
-                    addTag(finishNode(currentParentJSDocTag, currentParentJSDocTagEnd));
-                    currentParentJSDocTag = undefined;
-                    currentParentJSDocTagEnd = undefined;
-                }
-
                 function parseTag(): void {
                     Debug.assert(token === SyntaxKind.AtToken);
                     const atToken = createNode(SyntaxKind.AtToken, scanner.getTokenPos());
@@ -6198,34 +6157,23 @@ namespace ts {
                     }
 
                     const tag = handleTag(atToken, tagName) || handleUnknownTag(atToken, tagName);
-                    if (!currentParentJSDocTag) {
-                        addTag(tag);
-                    }
+                    addTag(tag);
                 }
 
                 function handleTag(atToken: Node, tagName: Identifier): JSDocTag {
                     if (tagName) {
                         switch (tagName.text) {
                             case "param":
-                                finishCurrentParentTag();
                                 return handleParamTag(atToken, tagName);
                             case "return":
                             case "returns":
-                                finishCurrentParentTag();
                                 return handleReturnTag(atToken, tagName);
                             case "template":
-                                finishCurrentParentTag();
                                 return handleTemplateTag(atToken, tagName);
                             case "type":
-                                // @typedef tag is allowed to have one @type tag, therefore seeing
-                                // a @type tag may not indicate the end of the current parent tag.
                                 return handleTypeTag(atToken, tagName);
                             case "typedef":
-                                finishCurrentParentTag();
                                 return handleTypedefTag(atToken, tagName);
-                            case "property":
-                            case "prop":
-                                return handlePropertyTag(atToken, tagName);
                         }
                     }
 
@@ -6251,25 +6199,6 @@ namespace ts {
                     }
                 }
 
-                function addToCurrentParentTag(tag: JSDocTag): void {
-                    if (!currentParentJSDocTag) {
-                        return;
-                    }
-                    switch (tag.kind) {
-                        case SyntaxKind.JSDocPropertyTag:
-                            if (!currentParentJSDocTag.jsDocPropertyTags) {
-                                currentParentJSDocTag.jsDocPropertyTags = <NodeArray<JSDocPropertyTag>>[];
-                            }
-                            currentParentJSDocTag.jsDocPropertyTags.push(<JSDocPropertyTag>tag);
-                            break;
-                        case SyntaxKind.JSDocTypeTag:
-                            if (!currentParentJSDocTag.jsDocTypeTag) {
-                                currentParentJSDocTag.jsDocTypeTag = <JSDocTypeTag>tag;
-                            }
-                            break;
-                    }
-                }
-
                 function tryParseTypeExpression(): JSDocTypeExpression {
                     if (token !== SyntaxKind.OpenBraceToken) {
                         return undefined;
@@ -6345,32 +6274,14 @@ namespace ts {
                         parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, Diagnostics._0_tag_already_specified, tagName.text);
                     }
 
-                    let result = <JSDocTypeTag>createNode(SyntaxKind.JSDocTypeTag, atToken.pos);
+                    const result = <JSDocTypeTag>createNode(SyntaxKind.JSDocTypeTag, atToken.pos);
                     result.atToken = atToken;
                     result.tagName = tagName;
                     result.typeExpression = tryParseTypeExpression();
-                    result = finishNode(result);
-
-                    if (currentParentJSDocTag && currentParentJSDocTag.kind === SyntaxKind.JSDocTypedefTag) {
-                        const parentTag = <JSDocTypedefTag>currentParentJSDocTag;
-                        if (!parentTag.typeExpression && !parentTag.jsDocTypeTag) {
-                            parentTag.jsDocTypeTag = result;
-                            currentParentJSDocTagEnd = scanner.getStartPos();
-                            return result;
-                        }
-                    }
-                    // If this @type tag is not part of the current parent tag, then
-                    // it denotes the end of the current parent tag.
-                    finishCurrentParentTag();
-                    return result;
+                    return finishNode(result);
                 }
 
                 function handlePropertyTag(atToken: Node, tagName: Identifier): JSDocPropertyTag {
-                    if (!currentParentJSDocTag) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, Diagnostics._0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag, tagName.text);
-                        return undefined;
-                    }
-
                     const typeExpression = tryParseTypeExpression();
                     skipWhitespace();
                     const name = parseJSDocIdentifierName();
@@ -6379,17 +6290,12 @@ namespace ts {
                         return undefined;
                     }
 
-                    let result = <JSDocPropertyTag>createNode(SyntaxKind.JSDocPropertyTag, atToken.pos);
+                    const result = <JSDocPropertyTag>createNode(SyntaxKind.JSDocPropertyTag, atToken.pos);
                     result.atToken = atToken;
                     result.tagName = tagName;
                     result.name = name;
                     result.typeExpression = typeExpression;
-                    result.type = typeExpression.type;
-                    result = finishNode(result);
-
-                    addToCurrentParentTag(result);
-                    currentParentJSDocTagEnd = scanner.getStartPos();
-                    return undefined;
+                    return finishNode(result);
                 }
 
                 function handleTypedefTag(atToken: Node, tagName: Identifier): JSDocTypedefTag {
@@ -6413,32 +6319,99 @@ namespace ts {
                         }
                     }
 
-                    const result = <JSDocTypedefTag>createNode(SyntaxKind.JSDocTypedefTag, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.name = name;
-                    result.typeExpression = typeExpression;
+                    const typedefTag = <JSDocTypedefTag>createNode(SyntaxKind.JSDocTypedefTag, atToken.pos);
+                    typedefTag.atToken = atToken;
+                    typedefTag.tagName = tagName;
+                    typedefTag.name = name;
+                    typedefTag.typeExpression = typeExpression;
 
-                    if (typeExpression && typeExpression.type.kind === SyntaxKind.JSDocTypeReference) {
-                        const jsDocTypeReference = <JSDocTypeReference>typeExpression.type;
-                        if (jsDocTypeReference.name.kind === SyntaxKind.Identifier) {
-                            const name = <Identifier>jsDocTypeReference.name;
-                            if (name.text === "Object") {
-                                currentParentJSDocTag = result;
+                    if (typeExpression) {
+                        if (typeExpression.type.kind === SyntaxKind.JSDocTypeReference) {
+                            const jsDocTypeReference = <JSDocTypeReference>typeExpression.type;
+                            if (jsDocTypeReference.name.kind === SyntaxKind.Identifier) {
+                                const name = <Identifier>jsDocTypeReference.name;
+                                if (name.text === "Object") {
+                                    typedefTag.type = scanChildTags();
+                                }
                             }
                         }
+                        if (!typedefTag.type) {
+                            typedefTag.type = typeExpression.type;
+                        }
                     }
-                    else if (!typeExpression) {
-                        currentParentJSDocTag = result;
+                    else {
+                        typedefTag.type = scanChildTags();
                     }
 
-                    if (!currentParentJSDocTag) {
-                        result.type = result.typeExpression.type;
-                        return finishNode(result);
+                    return finishNode(typedefTag);
+
+                    function scanChildTags(): JSDocTypeLiteral {
+                        const jsDocTypeLiteral = <JSDocTypeLiteral>createNode(SyntaxKind.JSDocTypeLiteral, scanner.getStartPos());
+                        let resumePos = scanner.getStartPos();
+                        let canParseTag = true;
+                        let seenAsterisk = false;
+                        let parentTagTerminated = false;
+
+                        while (token !== SyntaxKind.EndOfFileToken && !parentTagTerminated) {
+                            nextJSDocToken();
+                            switch (token) {
+                                case SyntaxKind.AtToken:
+                                    if (canParseTag) {
+                                        parentTagTerminated = !tryParseChildTag(jsDocTypeLiteral);
+                                    }
+                                    seenAsterisk = false;
+                                    break;
+                                case SyntaxKind.NewLineTrivia:
+                                    resumePos = scanner.getStartPos() - 1;
+                                    canParseTag = true;
+                                    seenAsterisk = false;
+                                    break;
+                                case SyntaxKind.AsteriskToken:
+                                    if (seenAsterisk) {
+                                        canParseTag = false;
+                                    }
+                                    seenAsterisk = true;
+                                    break;
+                                case SyntaxKind.Identifier:
+                                    canParseTag = false;
+                                case SyntaxKind.EndOfFileToken:
+                                    break;
+                            }
+                        }
+                        scanner.setTextPos(resumePos);
+                        return finishNode(jsDocTypeLiteral);
+                    }
+                }
+
+                function tryParseChildTag(parentTag: JSDocTypeLiteral): boolean {
+                    Debug.assert(token === SyntaxKind.AtToken);
+                    const atToken = createNode(SyntaxKind.AtToken, scanner.getStartPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+
+                    const tagName = parseJSDocIdentifierName();
+                    if (!tagName) {
+                        return false;
                     }
 
-                    currentParentJSDocTagEnd = scanner.getStartPos();
-                    return undefined;
+                    switch (tagName.text) {
+                        case "type":
+                            if (parentTag.jsDocTypeTag) {
+                                // already has a @type tag, terminate the parent tag now.
+                                return false;
+                            }
+                            parentTag.jsDocTypeTag = handleTypeTag(atToken, tagName);
+                            return true;
+                        case "prop":
+                        case "property":
+                            if (!parentTag.jsDocPropertyTags) {
+                                parentTag.jsDocPropertyTags = <NodeArray<JSDocPropertyTag>>[];
+                            }
+                            const propertyTag = handlePropertyTag(atToken, tagName);
+                            parentTag.jsDocPropertyTags.push(propertyTag);
+                            return true;
+                    }
+                    return false;
                 }
 
                 function handleTemplateTag(atToken: Node, tagName: Identifier): JSDocTemplateTag {
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index b472aa92e62..1b9af02a8d5 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1517,29 +1517,22 @@ namespace ts {
     }
 
     // @kind(SyntaxKind.JSDocTypedefTag)
-    export interface JSDocTypedefTag extends JSDocTag, Declaration, JSDocParentTag {
+    export interface JSDocTypedefTag extends JSDocTag, Declaration {
         name: Identifier;
         typeExpression?: JSDocTypeExpression;
         type: JSDocType;
     }
 
-    export interface JSDocParentTag extends JSDocTag {
-        jsDocPropertyTags?: NodeArray<JSDocPropertyTag>;
-        jsDocTypeTag?: JSDocTypeTag;
-    }
-
     // @kind(SyntaxKind.JSDocPropertyTag)
     export interface JSDocPropertyTag extends JSDocTag, TypeElement {
         name: Identifier;
         typeExpression: JSDocTypeExpression;
-        // Add a "type" property here to make the interface compatible 
-        // with the "VariableLikeDeclaration" definition
-        type: TypeNode;
     }
 
     // @kind(SyntaxKind.JSDocTypeLiteral)
     export interface JSDocTypeLiteral extends JSDocType {
-        members: NodeArray<TypeElement>;
+        jsDocPropertyTags?: NodeArray<JSDocPropertyTag>;
+        jsDocTypeTag?: JSDocTypeTag;
     }
 
     // @kind(SyntaxKind.JSDocParameterTag)

From 3b5c72c4bc033f5bf4d38931b2eed0bf0bf7e5e9 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 26 May 2016 15:30:31 -0700
Subject: [PATCH 116/332] Include outer function expressions in control flow
 analysis

---
 src/compiler/binder.ts  | 24 ++++++++++++++++-
 src/compiler/checker.ts | 57 +++++++++++++++++++++++++++++++++--------
 src/compiler/types.ts   |  7 +++++
 3 files changed, 77 insertions(+), 11 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index a7cb0d12758..2476709b501 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -472,6 +472,9 @@ namespace ts {
 
                 hasExplicitReturn = false;
                 currentFlow = { flags: FlowFlags.Start };
+                if (kind === SyntaxKind.FunctionExpression || kind === SyntaxKind.ArrowFunction) {
+                    (<FlowStart>currentFlow).container = <FunctionExpression | ArrowFunction>node;
+                }
                 currentBreakTarget = undefined;
                 currentContinueTarget = undefined;
                 activeLabels = undefined;
@@ -589,6 +592,9 @@ namespace ts {
                 case SyntaxKind.VariableDeclaration:
                     bindVariableDeclarationFlow(<VariableDeclaration>node);
                     break;
+                case SyntaxKind.CallExpression:
+                    bindCallExpressionFlow(<CallExpression>node);
+                    break;
                 default:
                     forEachChild(node, bind);
                     break;
@@ -1098,6 +1104,20 @@ namespace ts {
             }
         }
 
+        function bindCallExpressionFlow(node: CallExpression) {
+            forEachChild(node, bind);
+            // If the target of the call expression is a function expression or arrow function we have
+            // an immediately invoked function expression (IIFE). Initialize the flowNode property to
+            // the current control flow (which includes evaluation of the IIFE arguments).
+            let expr: Expression = node.expression;
+            while (expr.kind === SyntaxKind.ParenthesizedExpression) {
+                expr = (<ParenthesizedExpression>expr).expression;
+            }
+            if (expr.kind === SyntaxKind.FunctionExpression || expr.kind === SyntaxKind.ArrowFunction) {
+                node.flowNode = currentFlow;
+            }
+        }
+
         function getContainerFlags(node: Node): ContainerFlags {
             switch (node.kind) {
                 case SyntaxKind.ClassExpression:
@@ -2054,7 +2074,9 @@ namespace ts {
                     hasAsyncFunctions = true;
                 }
             }
-
+            if (currentFlow) {
+                node.flowNode = currentFlow;
+            }
             checkStrictModeFunctionName(<FunctionExpression>node);
             const bindingName = (<FunctionExpression>node).name ? (<FunctionExpression>node).name.text : "__function";
             return bindAnonymousDeclaration(<FunctionExpression>node, SymbolFlags.Function, bindingName);
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 5a7c6fa29e5..c14a7e26add 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7648,7 +7648,7 @@ namespace ts {
                 getInitialTypeOfBindingElement(<BindingElement>node);
         }
 
-        function getFlowTypeOfReference(reference: Node, declaredType: Type, assumeInitialized: boolean) {
+        function getFlowTypeOfReference(reference: Node, declaredType: Type, assumeInitialized: boolean, includeOuterFunctions: boolean) {
             let key: string;
             if (!reference.flowNode || assumeInitialized && !(declaredType.flags & TypeFlags.Narrowable)) {
                 return declaredType;
@@ -7694,15 +7694,30 @@ namespace ts {
                             getTypeAtFlowBranchLabel(<FlowLabel>flow) :
                             getTypeAtFlowLoopLabel(<FlowLabel>flow);
                     }
-                    else if (flow.flags & FlowFlags.Unreachable) {
+                    else if (flow.flags & FlowFlags.Start) {
+                        let container = (<FlowStart>flow).container;
+                        if (container) {
+                            // If container is an IIFE continue with the control flow associated with the
+                            // call expression node.
+                            let iife = getImmediatelyInvokedFunctionExpression(<FunctionExpression>container);
+                            if (iife && iife.flowNode) {
+                                flow = iife.flowNode;
+                                continue;
+                            }
+                            // Check if we should continue with the control flow of the containing function.
+                            if (includeOuterFunctions && container.flowNode) {
+                                flow = container.flowNode;
+                                continue;
+                            }
+                        }
+                        // At the top of the flow we have the initial type.
+                        type = initialType;
+                    }
+                    else {
                         // Unreachable code errors are reported in the binding phase. Here we
                         // simply return the declared type to reduce follow-on errors.
                         type = declaredType;
                     }
-                    else {
-                        // At the top of the flow we have the initial type.
-                        type = initialType;
-                    }
                     if (flow.flags & FlowFlags.Shared) {
                         // Record visited node and the associated type in the cache.
                         visitedFlowNodes[visitedFlowCount] = flow;
@@ -8071,6 +8086,27 @@ namespace ts {
             return expression;
         }
 
+        function getControlFlowContainer(node: Identifier, declarationContainer: Node, skipFunctionExpressions: boolean) {
+            let container = getContainingFunctionOrModule(node);
+            while (container !== declarationContainer &&
+                (container.kind === SyntaxKind.FunctionExpression || container.kind === SyntaxKind.ArrowFunction) &&
+                (skipFunctionExpressions || getImmediatelyInvokedFunctionExpression(<FunctionExpression>container))) {
+                container = getContainingFunctionOrModule(container);
+            }
+            return container;
+        }
+
+        function isDeclarationIncludedInFlow(reference: Node, declaration: Declaration, includeOuterFunctions: boolean) {
+            const declarationContainer = getContainingFunctionOrModule(declaration);
+            let container = getContainingFunctionOrModule(reference);
+            while (container !== declarationContainer &&
+                (container.kind === SyntaxKind.FunctionExpression || container.kind === SyntaxKind.ArrowFunction) &&
+                (includeOuterFunctions || getImmediatelyInvokedFunctionExpression(<FunctionExpression>container))) {
+                container = getContainingFunctionOrModule(container);
+            }
+            return container === declarationContainer;
+        }
+
         function checkIdentifier(node: Identifier): Type {
             const symbol = getResolvedSymbol(node);
 
@@ -8127,10 +8163,11 @@ namespace ts {
                 return type;
             }
             const declaration = localOrExportSymbol.valueDeclaration;
+            const includeOuterFunctions = isReadonlySymbol(localOrExportSymbol);
             const assumeInitialized = !strictNullChecks || (type.flags & TypeFlags.Any) !== 0 || !declaration ||
                 getRootDeclaration(declaration).kind === SyntaxKind.Parameter || isInAmbientContext(declaration) ||
-                getContainingFunctionOrModule(declaration) !== getContainingFunctionOrModule(node);
-            const flowType = getFlowTypeOfReference(node, type, assumeInitialized);
+                !isDeclarationIncludedInFlow(node, declaration, includeOuterFunctions);
+            const flowType = getFlowTypeOfReference(node, type, assumeInitialized, includeOuterFunctions);
             if (!assumeInitialized && !(getNullableKind(type) & TypeFlags.Undefined) && getNullableKind(flowType) & TypeFlags.Undefined) {
                 error(node, Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
                 // Return the declared type to reduce follow-on errors
@@ -8379,7 +8416,7 @@ namespace ts {
             if (isClassLike(container.parent)) {
                 const symbol = getSymbolOfNode(container.parent);
                 const type = container.flags & NodeFlags.Static ? getTypeOfSymbol(symbol) : (<InterfaceType>getDeclaredTypeOfSymbol(symbol)).thisType;
-                return getFlowTypeOfReference(node, type, /*assumeInitialized*/ true);
+                return getFlowTypeOfReference(node, type, /*assumeInitialized*/ true, /*includeOuterFunctions*/ true);
             }
 
             if (isInJavaScriptFile(node)) {
@@ -9991,7 +10028,7 @@ namespace ts {
                     return propType;
                 }
             }
-            return getFlowTypeOfReference(node, propType, /*assumeInitialized*/ true);
+            return getFlowTypeOfReference(node, propType, /*assumeInitialized*/ true, /*includeOuterFunctions*/ false);
         }
 
         function isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName, propertyName: string): boolean {
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 7613c489920..762d710d504 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1537,6 +1537,13 @@ namespace ts {
         id?: number;     // Node id used by flow type cache in checker
     }
 
+    // FlowStart represents the start of a control flow. For a function expression or arrow
+    // function, the container property references the function (which in turn has a flowNode
+    // property for the containing control flow).
+    export interface FlowStart extends FlowNode {
+        container?: FunctionExpression | ArrowFunction;
+    }
+
     // FlowLabel represents a junction with multiple possible preceding control flows.
     export interface FlowLabel extends FlowNode {
         antecedents: FlowNode[];

From d20664aa69b54cb05b427fb357c72a384100d131 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 26 May 2016 16:26:30 -0700
Subject: [PATCH 117/332] Fix test

---
 .../typeGuardsInFunctionAndModuleBlock.js     |  4 +--
 ...typeGuardsInFunctionAndModuleBlock.symbols | 18 +++++-----
 .../typeGuardsInFunctionAndModuleBlock.types  | 34 +++++++++----------
 .../typeGuardsInFunctionAndModuleBlock.ts     |  2 +-
 4 files changed, 29 insertions(+), 29 deletions(-)

diff --git a/tests/baselines/reference/typeGuardsInFunctionAndModuleBlock.js b/tests/baselines/reference/typeGuardsInFunctionAndModuleBlock.js
index 91443a9ae78..8ec45de814e 100644
--- a/tests/baselines/reference/typeGuardsInFunctionAndModuleBlock.js
+++ b/tests/baselines/reference/typeGuardsInFunctionAndModuleBlock.js
@@ -41,7 +41,7 @@ function foo4(x: number | string | boolean) {
                 : x.toString(); // number
         })(x); // x here is narrowed to number | boolean
 }
-// Type guards affect nested function expressions and nested function declarations
+// Type guards do not affect nested function declarations
 function foo5(x: number | string | boolean) {
     if (typeof x === "string") {
         var y = x; // string;
@@ -121,7 +121,7 @@ function foo4(x) {
                 : x.toString(); // number
         })(x); // x here is narrowed to number | boolean
 }
-// Type guards affect nested function expressions and nested function declarations
+// Type guards do not affect nested function declarations
 function foo5(x) {
     if (typeof x === "string") {
         var y = x; // string;
diff --git a/tests/baselines/reference/typeGuardsInFunctionAndModuleBlock.symbols b/tests/baselines/reference/typeGuardsInFunctionAndModuleBlock.symbols
index bf21641624e..56eeb22bf9f 100644
--- a/tests/baselines/reference/typeGuardsInFunctionAndModuleBlock.symbols
+++ b/tests/baselines/reference/typeGuardsInFunctionAndModuleBlock.symbols
@@ -27,9 +27,9 @@ function foo(x: number | string | boolean) {
 >toString : Symbol(Object.toString, Decl(lib.d.ts, --, --))
 
                 : x.toString(); // number
->x.toString : Symbol(toString, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>x.toString : Symbol(Number.toString, Decl(lib.d.ts, --, --))
 >x : Symbol(x, Decl(typeGuardsInFunctionAndModuleBlock.ts, 2, 13))
->toString : Symbol(toString, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>toString : Symbol(Number.toString, Decl(lib.d.ts, --, --))
 
         } ();
 }
@@ -60,9 +60,9 @@ function foo2(x: number | string | boolean) {
 >toString : Symbol(Object.toString, Decl(lib.d.ts, --, --))
 
                 : x.toString(); // number
->x.toString : Symbol(toString, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>x.toString : Symbol(Number.toString, Decl(lib.d.ts, --, --))
 >x : Symbol(x, Decl(typeGuardsInFunctionAndModuleBlock.ts, 12, 14))
->toString : Symbol(toString, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>toString : Symbol(Number.toString, Decl(lib.d.ts, --, --))
 
         } (x); // x here is narrowed to number | boolean
 >x : Symbol(x, Decl(typeGuardsInFunctionAndModuleBlock.ts, 12, 14))
@@ -91,9 +91,9 @@ function foo3(x: number | string | boolean) {
 >toString : Symbol(Object.toString, Decl(lib.d.ts, --, --))
 
                 : x.toString(); // number
->x.toString : Symbol(toString, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>x.toString : Symbol(Number.toString, Decl(lib.d.ts, --, --))
 >x : Symbol(x, Decl(typeGuardsInFunctionAndModuleBlock.ts, 22, 14))
->toString : Symbol(toString, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>toString : Symbol(Number.toString, Decl(lib.d.ts, --, --))
 
         })();
 }
@@ -123,14 +123,14 @@ function foo4(x: number | string | boolean) {
 >toString : Symbol(Object.toString, Decl(lib.d.ts, --, --))
 
                 : x.toString(); // number
->x.toString : Symbol(toString, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>x.toString : Symbol(Number.toString, Decl(lib.d.ts, --, --))
 >x : Symbol(x, Decl(typeGuardsInFunctionAndModuleBlock.ts, 32, 14))
->toString : Symbol(toString, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>toString : Symbol(Number.toString, Decl(lib.d.ts, --, --))
 
         })(x); // x here is narrowed to number | boolean
 >x : Symbol(x, Decl(typeGuardsInFunctionAndModuleBlock.ts, 32, 14))
 }
-// Type guards affect nested function expressions and nested function declarations
+// Type guards do not affect nested function declarations
 function foo5(x: number | string | boolean) {
 >foo5 : Symbol(foo5, Decl(typeGuardsInFunctionAndModuleBlock.ts, 41, 1))
 >x : Symbol(x, Decl(typeGuardsInFunctionAndModuleBlock.ts, 43, 14))
diff --git a/tests/baselines/reference/typeGuardsInFunctionAndModuleBlock.types b/tests/baselines/reference/typeGuardsInFunctionAndModuleBlock.types
index 67d1816cfc3..cc9553b9767 100644
--- a/tests/baselines/reference/typeGuardsInFunctionAndModuleBlock.types
+++ b/tests/baselines/reference/typeGuardsInFunctionAndModuleBlock.types
@@ -21,14 +21,14 @@ function foo(x: number | string | boolean) {
 >f : () => string
 
             var b = x; // number | boolean
->b : number | string | boolean
->x : number | string | boolean
+>b : number | boolean
+>x : number | boolean
 
             return typeof x === "boolean"
 >typeof x === "boolean"                ? x.toString() // boolean                : x.toString() : string
 >typeof x === "boolean" : boolean
 >typeof x : string
->x : number | string | boolean
+>x : number | boolean
 >"boolean" : string
 
                 ? x.toString() // boolean
@@ -40,7 +40,7 @@ function foo(x: number | string | boolean) {
                 : x.toString(); // number
 >x.toString() : string
 >x.toString : (radix?: number) => string
->x : number | string
+>x : number
 >toString : (radix?: number) => string
 
         } ();
@@ -66,14 +66,14 @@ function foo2(x: number | string | boolean) {
 >a : number | boolean
 
             var b = x; // new scope - number | boolean
->b : number | string | boolean
->x : number | string | boolean
+>b : number | boolean
+>x : number | boolean
 
             return typeof x === "boolean"
 >typeof x === "boolean"                ? x.toString() // boolean                : x.toString() : string
 >typeof x === "boolean" : boolean
 >typeof x : string
->x : number | string | boolean
+>x : number | boolean
 >"boolean" : string
 
                 ? x.toString() // boolean
@@ -85,7 +85,7 @@ function foo2(x: number | string | boolean) {
                 : x.toString(); // number
 >x.toString() : string
 >x.toString : (radix?: number) => string
->x : number | string
+>x : number
 >toString : (radix?: number) => string
 
         } (x); // x here is narrowed to number | boolean
@@ -111,14 +111,14 @@ function foo3(x: number | string | boolean) {
 >() => {            var b = x; // new scope - number | boolean            return typeof x === "boolean"                ? x.toString() // boolean                : x.toString(); // number        } : () => string
 
             var b = x; // new scope - number | boolean
->b : number | string | boolean
->x : number | string | boolean
+>b : number | boolean
+>x : number | boolean
 
             return typeof x === "boolean"
 >typeof x === "boolean"                ? x.toString() // boolean                : x.toString() : string
 >typeof x === "boolean" : boolean
 >typeof x : string
->x : number | string | boolean
+>x : number | boolean
 >"boolean" : string
 
                 ? x.toString() // boolean
@@ -130,7 +130,7 @@ function foo3(x: number | string | boolean) {
                 : x.toString(); // number
 >x.toString() : string
 >x.toString : (radix?: number) => string
->x : number | string
+>x : number
 >toString : (radix?: number) => string
 
         })();
@@ -156,14 +156,14 @@ function foo4(x: number | string | boolean) {
 >a : number | boolean
 
             var b = x; // new scope - number | boolean
->b : number | string | boolean
->x : number | string | boolean
+>b : number | boolean
+>x : number | boolean
 
             return typeof x === "boolean"
 >typeof x === "boolean"                ? x.toString() // boolean                : x.toString() : string
 >typeof x === "boolean" : boolean
 >typeof x : string
->x : number | string | boolean
+>x : number | boolean
 >"boolean" : string
 
                 ? x.toString() // boolean
@@ -175,13 +175,13 @@ function foo4(x: number | string | boolean) {
                 : x.toString(); // number
 >x.toString() : string
 >x.toString : (radix?: number) => string
->x : number | string
+>x : number
 >toString : (radix?: number) => string
 
         })(x); // x here is narrowed to number | boolean
 >x : number | boolean
 }
-// Type guards affect nested function expressions and nested function declarations
+// Type guards do not affect nested function declarations
 function foo5(x: number | string | boolean) {
 >foo5 : (x: number | string | boolean) => void
 >x : number | string | boolean
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardsInFunctionAndModuleBlock.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardsInFunctionAndModuleBlock.ts
index 5dbc925d04b..f1ba854394b 100644
--- a/tests/cases/conformance/expressions/typeGuards/typeGuardsInFunctionAndModuleBlock.ts
+++ b/tests/cases/conformance/expressions/typeGuards/typeGuardsInFunctionAndModuleBlock.ts
@@ -40,7 +40,7 @@ function foo4(x: number | string | boolean) {
                 : x.toString(); // number
         })(x); // x here is narrowed to number | boolean
 }
-// Type guards affect nested function expressions and nested function declarations
+// Type guards do not affect nested function declarations
 function foo5(x: number | string | boolean) {
     if (typeof x === "string") {
         var y = x; // string;

From e5e21f9b5e34f1c999289a9ba7cbd9adbde67290 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 26 May 2016 16:26:40 -0700
Subject: [PATCH 118/332] Add new tests

---
 .../constLocalsInFunctionExpressions.js       |  73 +++++++++
 .../constLocalsInFunctionExpressions.symbols  |  95 +++++++++++
 .../constLocalsInFunctionExpressions.types    | 121 ++++++++++++++
 tests/baselines/reference/controlFlowIIFE.js  |  87 ++++++++++
 .../reference/controlFlowIIFE.symbols         | 108 +++++++++++++
 .../baselines/reference/controlFlowIIFE.types | 149 ++++++++++++++++++
 .../constLocalsInFunctionExpressions.ts       |  38 +++++
 .../controlFlow/controlFlowIIFE.ts            |  47 ++++++
 8 files changed, 718 insertions(+)
 create mode 100644 tests/baselines/reference/constLocalsInFunctionExpressions.js
 create mode 100644 tests/baselines/reference/constLocalsInFunctionExpressions.symbols
 create mode 100644 tests/baselines/reference/constLocalsInFunctionExpressions.types
 create mode 100644 tests/baselines/reference/controlFlowIIFE.js
 create mode 100644 tests/baselines/reference/controlFlowIIFE.symbols
 create mode 100644 tests/baselines/reference/controlFlowIIFE.types
 create mode 100644 tests/cases/conformance/controlFlow/constLocalsInFunctionExpressions.ts
 create mode 100644 tests/cases/conformance/controlFlow/controlFlowIIFE.ts

diff --git a/tests/baselines/reference/constLocalsInFunctionExpressions.js b/tests/baselines/reference/constLocalsInFunctionExpressions.js
new file mode 100644
index 00000000000..473de3b1a6c
--- /dev/null
+++ b/tests/baselines/reference/constLocalsInFunctionExpressions.js
@@ -0,0 +1,73 @@
+//// [constLocalsInFunctionExpressions.ts]
+declare function getStringOrNumber(): string | number;
+
+function f1() {
+    const x = getStringOrNumber();
+    if (typeof x === "string") {
+        const f = () => x.length;
+    }
+}
+
+function f2() {
+    const x = getStringOrNumber();
+    if (typeof x !== "string") {
+        return;
+    }
+    const f = () => x.length;
+}
+
+function f3() {
+    const x = getStringOrNumber();
+    if (typeof x === "string") {
+        const f = function() { return x.length; };
+    }
+}
+
+function f4() {
+    const x = getStringOrNumber();
+    if (typeof x !== "string") {
+        return;
+    }
+    const f = function() { return x.length; };
+}
+
+function f5() {
+    const x = getStringOrNumber();
+    if (typeof x === "string") {
+        const f = () => () => x.length;
+    }
+}
+
+//// [constLocalsInFunctionExpressions.js]
+function f1() {
+    var x = getStringOrNumber();
+    if (typeof x === "string") {
+        var f = function () { return x.length; };
+    }
+}
+function f2() {
+    var x = getStringOrNumber();
+    if (typeof x !== "string") {
+        return;
+    }
+    var f = function () { return x.length; };
+}
+function f3() {
+    var x = getStringOrNumber();
+    if (typeof x === "string") {
+        var f = function () { return x.length; };
+    }
+}
+function f4() {
+    var x = getStringOrNumber();
+    if (typeof x !== "string") {
+        return;
+    }
+    var f = function () { return x.length; };
+}
+function f5() {
+    var x = getStringOrNumber();
+    if (typeof x === "string") {
+        var f = function () { return function () { return x.length; }; };
+    }
+}
diff --git a/tests/baselines/reference/constLocalsInFunctionExpressions.symbols b/tests/baselines/reference/constLocalsInFunctionExpressions.symbols
new file mode 100644
index 00000000000..d9465a118aa
--- /dev/null
+++ b/tests/baselines/reference/constLocalsInFunctionExpressions.symbols
@@ -0,0 +1,95 @@
+=== tests/cases/conformance/controlFlow/constLocalsInFunctionExpressions.ts ===
+declare function getStringOrNumber(): string | number;
+>getStringOrNumber : Symbol(getStringOrNumber, Decl(constLocalsInFunctionExpressions.ts, 0, 0))
+
+function f1() {
+>f1 : Symbol(f1, Decl(constLocalsInFunctionExpressions.ts, 0, 54))
+
+    const x = getStringOrNumber();
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 3, 9))
+>getStringOrNumber : Symbol(getStringOrNumber, Decl(constLocalsInFunctionExpressions.ts, 0, 0))
+
+    if (typeof x === "string") {
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 3, 9))
+
+        const f = () => x.length;
+>f : Symbol(f, Decl(constLocalsInFunctionExpressions.ts, 5, 13))
+>x.length : Symbol(String.length, Decl(lib.d.ts, --, --))
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 3, 9))
+>length : Symbol(String.length, Decl(lib.d.ts, --, --))
+    }
+}
+
+function f2() {
+>f2 : Symbol(f2, Decl(constLocalsInFunctionExpressions.ts, 7, 1))
+
+    const x = getStringOrNumber();
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 10, 9))
+>getStringOrNumber : Symbol(getStringOrNumber, Decl(constLocalsInFunctionExpressions.ts, 0, 0))
+
+    if (typeof x !== "string") {
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 10, 9))
+
+        return;
+    }
+    const f = () => x.length;
+>f : Symbol(f, Decl(constLocalsInFunctionExpressions.ts, 14, 9))
+>x.length : Symbol(String.length, Decl(lib.d.ts, --, --))
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 10, 9))
+>length : Symbol(String.length, Decl(lib.d.ts, --, --))
+}
+
+function f3() {
+>f3 : Symbol(f3, Decl(constLocalsInFunctionExpressions.ts, 15, 1))
+
+    const x = getStringOrNumber();
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 18, 9))
+>getStringOrNumber : Symbol(getStringOrNumber, Decl(constLocalsInFunctionExpressions.ts, 0, 0))
+
+    if (typeof x === "string") {
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 18, 9))
+
+        const f = function() { return x.length; };
+>f : Symbol(f, Decl(constLocalsInFunctionExpressions.ts, 20, 13))
+>x.length : Symbol(String.length, Decl(lib.d.ts, --, --))
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 18, 9))
+>length : Symbol(String.length, Decl(lib.d.ts, --, --))
+    }
+}
+
+function f4() {
+>f4 : Symbol(f4, Decl(constLocalsInFunctionExpressions.ts, 22, 1))
+
+    const x = getStringOrNumber();
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 25, 9))
+>getStringOrNumber : Symbol(getStringOrNumber, Decl(constLocalsInFunctionExpressions.ts, 0, 0))
+
+    if (typeof x !== "string") {
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 25, 9))
+
+        return;
+    }
+    const f = function() { return x.length; };
+>f : Symbol(f, Decl(constLocalsInFunctionExpressions.ts, 29, 9))
+>x.length : Symbol(String.length, Decl(lib.d.ts, --, --))
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 25, 9))
+>length : Symbol(String.length, Decl(lib.d.ts, --, --))
+}
+
+function f5() {
+>f5 : Symbol(f5, Decl(constLocalsInFunctionExpressions.ts, 30, 1))
+
+    const x = getStringOrNumber();
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 33, 9))
+>getStringOrNumber : Symbol(getStringOrNumber, Decl(constLocalsInFunctionExpressions.ts, 0, 0))
+
+    if (typeof x === "string") {
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 33, 9))
+
+        const f = () => () => x.length;
+>f : Symbol(f, Decl(constLocalsInFunctionExpressions.ts, 35, 13))
+>x.length : Symbol(String.length, Decl(lib.d.ts, --, --))
+>x : Symbol(x, Decl(constLocalsInFunctionExpressions.ts, 33, 9))
+>length : Symbol(String.length, Decl(lib.d.ts, --, --))
+    }
+}
diff --git a/tests/baselines/reference/constLocalsInFunctionExpressions.types b/tests/baselines/reference/constLocalsInFunctionExpressions.types
new file mode 100644
index 00000000000..e9f0086f6b1
--- /dev/null
+++ b/tests/baselines/reference/constLocalsInFunctionExpressions.types
@@ -0,0 +1,121 @@
+=== tests/cases/conformance/controlFlow/constLocalsInFunctionExpressions.ts ===
+declare function getStringOrNumber(): string | number;
+>getStringOrNumber : () => string | number
+
+function f1() {
+>f1 : () => void
+
+    const x = getStringOrNumber();
+>x : string | number
+>getStringOrNumber() : string | number
+>getStringOrNumber : () => string | number
+
+    if (typeof x === "string") {
+>typeof x === "string" : boolean
+>typeof x : string
+>x : string | number
+>"string" : string
+
+        const f = () => x.length;
+>f : () => number
+>() => x.length : () => number
+>x.length : number
+>x : string
+>length : number
+    }
+}
+
+function f2() {
+>f2 : () => void
+
+    const x = getStringOrNumber();
+>x : string | number
+>getStringOrNumber() : string | number
+>getStringOrNumber : () => string | number
+
+    if (typeof x !== "string") {
+>typeof x !== "string" : boolean
+>typeof x : string
+>x : string | number
+>"string" : string
+
+        return;
+    }
+    const f = () => x.length;
+>f : () => number
+>() => x.length : () => number
+>x.length : number
+>x : string
+>length : number
+}
+
+function f3() {
+>f3 : () => void
+
+    const x = getStringOrNumber();
+>x : string | number
+>getStringOrNumber() : string | number
+>getStringOrNumber : () => string | number
+
+    if (typeof x === "string") {
+>typeof x === "string" : boolean
+>typeof x : string
+>x : string | number
+>"string" : string
+
+        const f = function() { return x.length; };
+>f : () => number
+>function() { return x.length; } : () => number
+>x.length : number
+>x : string
+>length : number
+    }
+}
+
+function f4() {
+>f4 : () => void
+
+    const x = getStringOrNumber();
+>x : string | number
+>getStringOrNumber() : string | number
+>getStringOrNumber : () => string | number
+
+    if (typeof x !== "string") {
+>typeof x !== "string" : boolean
+>typeof x : string
+>x : string | number
+>"string" : string
+
+        return;
+    }
+    const f = function() { return x.length; };
+>f : () => number
+>function() { return x.length; } : () => number
+>x.length : number
+>x : string
+>length : number
+}
+
+function f5() {
+>f5 : () => void
+
+    const x = getStringOrNumber();
+>x : string | number
+>getStringOrNumber() : string | number
+>getStringOrNumber : () => string | number
+
+    if (typeof x === "string") {
+>typeof x === "string" : boolean
+>typeof x : string
+>x : string | number
+>"string" : string
+
+        const f = () => () => x.length;
+>f : () => () => number
+>() => () => x.length : () => () => number
+>() => x.length : () => number
+>x.length : number
+>x : string
+>length : number
+    }
+}
diff --git a/tests/baselines/reference/controlFlowIIFE.js b/tests/baselines/reference/controlFlowIIFE.js
new file mode 100644
index 00000000000..6454d1117db
--- /dev/null
+++ b/tests/baselines/reference/controlFlowIIFE.js
@@ -0,0 +1,87 @@
+//// [controlFlowIIFE.ts]
+
+declare function getStringOrNumber(): string | number;
+
+function f1() {
+    let x = getStringOrNumber();
+    if (typeof x === "string") {
+        let n = function() {
+            return x.length;
+        }();
+    }
+}
+
+function f2() {
+    let x = getStringOrNumber();
+    if (typeof x === "string") {
+        let n = (function() {
+            return x.length;
+        })();
+    }
+}
+
+function f3() {
+    let x = getStringOrNumber();
+    let y: number;
+    if (typeof x === "string") {
+        let n = (z => x.length + y + z)(y = 1);
+    }
+}
+
+// Repros from #8381
+
+let maybeNumber: number | undefined;
+(function () {
+    maybeNumber = 1;
+})();
+if (maybeNumber !== undefined) {
+    maybeNumber++;
+}
+
+let test: string | undefined;
+if (!test) {
+    throw new Error('Test is not defined');
+}
+(() => {
+    test.slice(1); // No error
+})();
+
+//// [controlFlowIIFE.js]
+function f1() {
+    var x = getStringOrNumber();
+    if (typeof x === "string") {
+        var n = function () {
+            return x.length;
+        }();
+    }
+}
+function f2() {
+    var x = getStringOrNumber();
+    if (typeof x === "string") {
+        var n = (function () {
+            return x.length;
+        })();
+    }
+}
+function f3() {
+    var x = getStringOrNumber();
+    var y;
+    if (typeof x === "string") {
+        var n = (function (z) { return x.length + y + z; })(y = 1);
+    }
+}
+// Repros from #8381
+var maybeNumber;
+(function () {
+    maybeNumber = 1;
+})();
+if (maybeNumber !== undefined) {
+    maybeNumber++;
+}
+var test;
+if (!test) {
+    throw new Error('Test is not defined');
+}
+(function () {
+    test.slice(1); // No error
+})();
diff --git a/tests/baselines/reference/controlFlowIIFE.symbols b/tests/baselines/reference/controlFlowIIFE.symbols
new file mode 100644
index 00000000000..2a03bb3ff2b
--- /dev/null
+++ b/tests/baselines/reference/controlFlowIIFE.symbols
@@ -0,0 +1,108 @@
+=== tests/cases/conformance/controlFlow/controlFlowIIFE.ts ===
+
+declare function getStringOrNumber(): string | number;
+>getStringOrNumber : Symbol(getStringOrNumber, Decl(controlFlowIIFE.ts, 0, 0))
+
+function f1() {
+>f1 : Symbol(f1, Decl(controlFlowIIFE.ts, 1, 54))
+
+    let x = getStringOrNumber();
+>x : Symbol(x, Decl(controlFlowIIFE.ts, 4, 7))
+>getStringOrNumber : Symbol(getStringOrNumber, Decl(controlFlowIIFE.ts, 0, 0))
+
+    if (typeof x === "string") {
+>x : Symbol(x, Decl(controlFlowIIFE.ts, 4, 7))
+
+        let n = function() {
+>n : Symbol(n, Decl(controlFlowIIFE.ts, 6, 11))
+
+            return x.length;
+>x.length : Symbol(String.length, Decl(lib.d.ts, --, --))
+>x : Symbol(x, Decl(controlFlowIIFE.ts, 4, 7))
+>length : Symbol(String.length, Decl(lib.d.ts, --, --))
+
+        }();
+    }
+}
+
+function f2() {
+>f2 : Symbol(f2, Decl(controlFlowIIFE.ts, 10, 1))
+
+    let x = getStringOrNumber();
+>x : Symbol(x, Decl(controlFlowIIFE.ts, 13, 7))
+>getStringOrNumber : Symbol(getStringOrNumber, Decl(controlFlowIIFE.ts, 0, 0))
+
+    if (typeof x === "string") {
+>x : Symbol(x, Decl(controlFlowIIFE.ts, 13, 7))
+
+        let n = (function() {
+>n : Symbol(n, Decl(controlFlowIIFE.ts, 15, 11))
+
+            return x.length;
+>x.length : Symbol(String.length, Decl(lib.d.ts, --, --))
+>x : Symbol(x, Decl(controlFlowIIFE.ts, 13, 7))
+>length : Symbol(String.length, Decl(lib.d.ts, --, --))
+
+        })();
+    }
+}
+
+function f3() {
+>f3 : Symbol(f3, Decl(controlFlowIIFE.ts, 19, 1))
+
+    let x = getStringOrNumber();
+>x : Symbol(x, Decl(controlFlowIIFE.ts, 22, 7))
+>getStringOrNumber : Symbol(getStringOrNumber, Decl(controlFlowIIFE.ts, 0, 0))
+
+    let y: number;
+>y : Symbol(y, Decl(controlFlowIIFE.ts, 23, 7))
+
+    if (typeof x === "string") {
+>x : Symbol(x, Decl(controlFlowIIFE.ts, 22, 7))
+
+        let n = (z => x.length + y + z)(y = 1);
+>n : Symbol(n, Decl(controlFlowIIFE.ts, 25, 11))
+>z : Symbol(z, Decl(controlFlowIIFE.ts, 25, 17))
+>x.length : Symbol(String.length, Decl(lib.d.ts, --, --))
+>x : Symbol(x, Decl(controlFlowIIFE.ts, 22, 7))
+>length : Symbol(String.length, Decl(lib.d.ts, --, --))
+>y : Symbol(y, Decl(controlFlowIIFE.ts, 23, 7))
+>z : Symbol(z, Decl(controlFlowIIFE.ts, 25, 17))
+>y : Symbol(y, Decl(controlFlowIIFE.ts, 23, 7))
+    }
+}
+
+// Repros from #8381
+
+let maybeNumber: number | undefined;
+>maybeNumber : Symbol(maybeNumber, Decl(controlFlowIIFE.ts, 31, 3))
+
+(function () {
+    maybeNumber = 1;
+>maybeNumber : Symbol(maybeNumber, Decl(controlFlowIIFE.ts, 31, 3))
+
+})();
+if (maybeNumber !== undefined) {
+>maybeNumber : Symbol(maybeNumber, Decl(controlFlowIIFE.ts, 31, 3))
+>undefined : Symbol(undefined)
+
+    maybeNumber++;
+>maybeNumber : Symbol(maybeNumber, Decl(controlFlowIIFE.ts, 31, 3))
+}
+
+let test: string | undefined;
+>test : Symbol(test, Decl(controlFlowIIFE.ts, 39, 3))
+
+if (!test) {
+>test : Symbol(test, Decl(controlFlowIIFE.ts, 39, 3))
+
+    throw new Error('Test is not defined');
+>Error : Symbol(Error, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+}
+(() => {
+    test.slice(1); // No error
+>test.slice : Symbol(String.slice, Decl(lib.d.ts, --, --))
+>test : Symbol(test, Decl(controlFlowIIFE.ts, 39, 3))
+>slice : Symbol(String.slice, Decl(lib.d.ts, --, --))
+
+})();
diff --git a/tests/baselines/reference/controlFlowIIFE.types b/tests/baselines/reference/controlFlowIIFE.types
new file mode 100644
index 00000000000..0a6ad5da02f
--- /dev/null
+++ b/tests/baselines/reference/controlFlowIIFE.types
@@ -0,0 +1,149 @@
+=== tests/cases/conformance/controlFlow/controlFlowIIFE.ts ===
+
+declare function getStringOrNumber(): string | number;
+>getStringOrNumber : () => string | number
+
+function f1() {
+>f1 : () => void
+
+    let x = getStringOrNumber();
+>x : string | number
+>getStringOrNumber() : string | number
+>getStringOrNumber : () => string | number
+
+    if (typeof x === "string") {
+>typeof x === "string" : boolean
+>typeof x : string
+>x : string | number
+>"string" : string
+
+        let n = function() {
+>n : number
+>function() {            return x.length;        }() : number
+>function() {            return x.length;        } : () => number
+
+            return x.length;
+>x.length : number
+>x : string
+>length : number
+
+        }();
+    }
+}
+
+function f2() {
+>f2 : () => void
+
+    let x = getStringOrNumber();
+>x : string | number
+>getStringOrNumber() : string | number
+>getStringOrNumber : () => string | number
+
+    if (typeof x === "string") {
+>typeof x === "string" : boolean
+>typeof x : string
+>x : string | number
+>"string" : string
+
+        let n = (function() {
+>n : number
+>(function() {            return x.length;        })() : number
+>(function() {            return x.length;        }) : () => number
+>function() {            return x.length;        } : () => number
+
+            return x.length;
+>x.length : number
+>x : string
+>length : number
+
+        })();
+    }
+}
+
+function f3() {
+>f3 : () => void
+
+    let x = getStringOrNumber();
+>x : string | number
+>getStringOrNumber() : string | number
+>getStringOrNumber : () => string | number
+
+    let y: number;
+>y : number
+
+    if (typeof x === "string") {
+>typeof x === "string" : boolean
+>typeof x : string
+>x : string | number
+>"string" : string
+
+        let n = (z => x.length + y + z)(y = 1);
+>n : number
+>(z => x.length + y + z)(y = 1) : number
+>(z => x.length + y + z) : (z: number) => number
+>z => x.length + y + z : (z: number) => number
+>z : number
+>x.length + y + z : number
+>x.length + y : number
+>x.length : number
+>x : string
+>length : number
+>y : number
+>z : number
+>y = 1 : number
+>y : number
+>1 : number
+    }
+}
+
+// Repros from #8381
+
+let maybeNumber: number | undefined;
+>maybeNumber : number | undefined
+
+(function () {
+>(function () {    maybeNumber = 1;})() : void
+>(function () {    maybeNumber = 1;}) : () => void
+>function () {    maybeNumber = 1;} : () => void
+
+    maybeNumber = 1;
+>maybeNumber = 1 : number
+>maybeNumber : number | undefined
+>1 : number
+
+})();
+if (maybeNumber !== undefined) {
+>maybeNumber !== undefined : boolean
+>maybeNumber : number | undefined
+>undefined : undefined
+
+    maybeNumber++;
+>maybeNumber++ : number
+>maybeNumber : number
+}
+
+let test: string | undefined;
+>test : string | undefined
+
+if (!test) {
+>!test : boolean
+>test : string | undefined
+
+    throw new Error('Test is not defined');
+>new Error('Test is not defined') : Error
+>Error : ErrorConstructor
+>'Test is not defined' : string
+}
+(() => {
+>(() => {    test.slice(1); // No error})() : void
+>(() => {    test.slice(1); // No error}) : () => void
+>() => {    test.slice(1); // No error} : () => void
+
+    test.slice(1); // No error
+>test.slice(1) : string
+>test.slice : (start?: number | undefined, end?: number | undefined) => string
+>test : string
+>slice : (start?: number | undefined, end?: number | undefined) => string
+>1 : number
+
+})();
diff --git a/tests/cases/conformance/controlFlow/constLocalsInFunctionExpressions.ts b/tests/cases/conformance/controlFlow/constLocalsInFunctionExpressions.ts
new file mode 100644
index 00000000000..69b19fcb307
--- /dev/null
+++ b/tests/cases/conformance/controlFlow/constLocalsInFunctionExpressions.ts
@@ -0,0 +1,38 @@
+declare function getStringOrNumber(): string | number;
+
+function f1() {
+    const x = getStringOrNumber();
+    if (typeof x === "string") {
+        const f = () => x.length;
+    }
+}
+
+function f2() {
+    const x = getStringOrNumber();
+    if (typeof x !== "string") {
+        return;
+    }
+    const f = () => x.length;
+}
+
+function f3() {
+    const x = getStringOrNumber();
+    if (typeof x === "string") {
+        const f = function() { return x.length; };
+    }
+}
+
+function f4() {
+    const x = getStringOrNumber();
+    if (typeof x !== "string") {
+        return;
+    }
+    const f = function() { return x.length; };
+}
+
+function f5() {
+    const x = getStringOrNumber();
+    if (typeof x === "string") {
+        const f = () => () => x.length;
+    }
+}
\ No newline at end of file
diff --git a/tests/cases/conformance/controlFlow/controlFlowIIFE.ts b/tests/cases/conformance/controlFlow/controlFlowIIFE.ts
new file mode 100644
index 00000000000..e703fb2fdff
--- /dev/null
+++ b/tests/cases/conformance/controlFlow/controlFlowIIFE.ts
@@ -0,0 +1,47 @@
+// @strictNullChecks: true
+
+declare function getStringOrNumber(): string | number;
+
+function f1() {
+    let x = getStringOrNumber();
+    if (typeof x === "string") {
+        let n = function() {
+            return x.length;
+        }();
+    }
+}
+
+function f2() {
+    let x = getStringOrNumber();
+    if (typeof x === "string") {
+        let n = (function() {
+            return x.length;
+        })();
+    }
+}
+
+function f3() {
+    let x = getStringOrNumber();
+    let y: number;
+    if (typeof x === "string") {
+        let n = (z => x.length + y + z)(y = 1);
+    }
+}
+
+// Repros from #8381
+
+let maybeNumber: number | undefined;
+(function () {
+    maybeNumber = 1;
+})();
+if (maybeNumber !== undefined) {
+    maybeNumber++;
+}
+
+let test: string | undefined;
+if (!test) {
+    throw new Error('Test is not defined');
+}
+(() => {
+    test.slice(1); // No error
+})();
\ No newline at end of file

From 1647d20d90e0cc68a2714abeb7a1e81bb32c2b17 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 26 May 2016 16:50:36 -0700
Subject: [PATCH 119/332] Fix linting errors

---
 src/compiler/checker.ts | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index c14a7e26add..58aaae9f72b 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7695,11 +7695,11 @@ namespace ts {
                             getTypeAtFlowLoopLabel(<FlowLabel>flow);
                     }
                     else if (flow.flags & FlowFlags.Start) {
-                        let container = (<FlowStart>flow).container;
+                        const container = (<FlowStart>flow).container;
                         if (container) {
                             // If container is an IIFE continue with the control flow associated with the
                             // call expression node.
-                            let iife = getImmediatelyInvokedFunctionExpression(<FunctionExpression>container);
+                            const iife = getImmediatelyInvokedFunctionExpression(<FunctionExpression>container);
                             if (iife && iife.flowNode) {
                                 flow = iife.flowNode;
                                 continue;
@@ -8086,16 +8086,6 @@ namespace ts {
             return expression;
         }
 
-        function getControlFlowContainer(node: Identifier, declarationContainer: Node, skipFunctionExpressions: boolean) {
-            let container = getContainingFunctionOrModule(node);
-            while (container !== declarationContainer &&
-                (container.kind === SyntaxKind.FunctionExpression || container.kind === SyntaxKind.ArrowFunction) &&
-                (skipFunctionExpressions || getImmediatelyInvokedFunctionExpression(<FunctionExpression>container))) {
-                container = getContainingFunctionOrModule(container);
-            }
-            return container;
-        }
-
         function isDeclarationIncludedInFlow(reference: Node, declaration: Declaration, includeOuterFunctions: boolean) {
             const declarationContainer = getContainingFunctionOrModule(declaration);
             let container = getContainingFunctionOrModule(reference);

From 3b7814be8996e8b727ea73597f6074cce8ee0763 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Thu, 26 May 2016 17:04:10 -0700
Subject: [PATCH 120/332] Reorder options alphabetically

---
 src/compiler/types.ts | 77 +++++++++++++++++++------------------------
 1 file changed, 34 insertions(+), 43 deletions(-)

diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 7613c489920..c240fd561c8 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2445,83 +2445,74 @@ namespace ts {
     export type CompilerOptionsValue = string | number | boolean | (string | number)[] | TsConfigOnlyOptions;
 
     export interface CompilerOptions {
-        allowNonTsExtensions?: boolean;
+        allowJs?: boolean;
+        /*@internal*/ allowNonTsExtensions?: boolean;
+        allowSyntheticDefaultImports?: boolean;
+        allowUnreachableCode?: boolean;
+        allowUnusedLabels?: boolean;
+        baseUrl?: string;
         charset?: string;
+        /* @internal */ configFilePath?: string;           // When options come from a config file, its path is recorded here
         declaration?: boolean;
         declarationDir?: string;
         diagnostics?: boolean;
         emitBOM?: boolean;
-        help?: boolean;
-        init?: boolean;
+        emitDecoratorMetadata?: boolean;
+        experimentalDecorators?: boolean;
+        forceConsistentCasingInFileNames?: boolean;
+        /*@internal*/help?: boolean;
+        /*@internal*/init?: boolean;
         inlineSourceMap?: boolean;
         inlineSources?: boolean;
+        isolatedModules?: boolean;
         jsx?: JsxEmit;
-        reactNamespace?: string;
-        listFiles?: boolean;
-        typesSearchPaths?: string[];
+        lib?: string[];
+        /*@internal*/listEmittedFiles?: boolean;
+        /*@internal*/listFiles?: boolean;
         locale?: string;
         mapRoot?: string;
         module?: ModuleKind;
+        moduleResolution?: ModuleResolutionKind;
         newLine?: NewLineKind;
         noEmit?: boolean;
         noEmitHelpers?: boolean;
         noEmitOnError?: boolean;
         noErrorTruncation?: boolean;
+        noFallthroughCasesInSwitch?: boolean;
         noImplicitAny?: boolean;
+        noImplicitReturns?: boolean;
         noImplicitThis?: boolean;
+        noImplicitUseStrict?: boolean;
         noLib?: boolean;
         noResolve?: boolean;
         out?: string;
-        outFile?: string;
         outDir?: string;
+        outFile?: string;
+        paths?: PathSubstitutions;
         preserveConstEnums?: boolean;
-        /* @internal */ pretty?: DiagnosticStyle;
         project?: string;
+        /* @internal */ pretty?: DiagnosticStyle;
+        reactNamespace?: string;
         removeComments?: boolean;
         rootDir?: string;
+        rootDirs?: RootPaths;
+        skipLibCheck?: boolean;
+        /* @internal */ skipDefaultLibCheck?: boolean;
         sourceMap?: boolean;
         sourceRoot?: string;
+        strictNullChecks?: boolean;
+        /* @internal */ stripInternal?: boolean;
         suppressExcessPropertyErrors?: boolean;
         suppressImplicitAnyIndexErrors?: boolean;
+        /* @internal */ suppressOutputPathCheck?: boolean;         // Do not perform validation of output file name in transpile scenarios
         target?: ScriptTarget;
-        version?: boolean;
-        watch?: boolean;
-        isolatedModules?: boolean;
-        experimentalDecorators?: boolean;
-        emitDecoratorMetadata?: boolean;
-        moduleResolution?: ModuleResolutionKind;
-        allowUnusedLabels?: boolean;
-        allowUnreachableCode?: boolean;
-        noImplicitReturns?: boolean;
-        noFallthroughCasesInSwitch?: boolean;
-        forceConsistentCasingInFileNames?: boolean;
-        baseUrl?: string;
-        paths?: PathSubstitutions;
-        rootDirs?: RootPaths;
         traceResolution?: boolean;
-        allowSyntheticDefaultImports?: boolean;
-        allowJs?: boolean;
-        noImplicitUseStrict?: boolean;
-        strictNullChecks?: boolean;
-        skipLibCheck?: boolean;
-        listEmittedFiles?: boolean;
-        lib?: string[];
-        /* @internal */ stripInternal?: boolean;
-
-        // Skip checking lib.d.ts to help speed up tests.
-        /* @internal */ skipDefaultLibCheck?: boolean;
-        // Do not perform validation of output file name in transpile scenarios
-        /* @internal */ suppressOutputPathCheck?: boolean;
-
-        /* @internal */
-        // When options come from a config file, its path is recorded here
-        configFilePath?: string;
-        /* @internal */
-        // Path used to used to compute primary search locations
-        typesRoot?: string;
         types?: string[];
+        /* @internal */ typesRoot?: string;
+        typesSearchPaths?: string[];             // Path used to used to compute primary search locations
+        /*@internal*/ version?: boolean;
+        /*@internal*/ watch?: boolean;
 
-        list?: string[];
         [option: string]: CompilerOptionsValue | undefined;
     }
 

From 5d9c871d9576df30865c081ee8a972ef8437d54d Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Thu, 26 May 2016 17:12:13 -0700
Subject: [PATCH 121/332] Mark diagnostics, and skipDefaultLibCheck as internal

---
 src/compiler/types.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index c240fd561c8..4a66fc42ef0 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2455,7 +2455,7 @@ namespace ts {
         /* @internal */ configFilePath?: string;           // When options come from a config file, its path is recorded here
         declaration?: boolean;
         declarationDir?: string;
-        diagnostics?: boolean;
+        /* @internal */ diagnostics?: boolean;
         emitBOM?: boolean;
         emitDecoratorMetadata?: boolean;
         experimentalDecorators?: boolean;
@@ -2497,7 +2497,7 @@ namespace ts {
         rootDir?: string;
         rootDirs?: RootPaths;
         skipLibCheck?: boolean;
-        /* @internal */ skipDefaultLibCheck?: boolean;
+        skipDefaultLibCheck?: boolean;
         sourceMap?: boolean;
         sourceRoot?: string;
         strictNullChecks?: boolean;

From b2664e7f842fe838e4a96564651b0fab723207ee Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Fri, 27 May 2016 06:12:10 -0700
Subject: [PATCH 122/332] Use a JSON.stringify replacer function instead of
 changing the value beforehand

---
 src/harness/fourslash.ts                      | 52 ++++++-------------
 .../fourslash/deleteClassWithEnumPresent.ts   |  3 +-
 .../cases/fourslash/getNavigationBarItems.ts  |  3 +-
 tests/cases/fourslash/navbar_const.ts         |  3 +-
 .../navbar_contains-no-duplicates.ts          |  3 +-
 tests/cases/fourslash/navbar_exportDefault.ts | 16 ++----
 tests/cases/fourslash/navbar_let.ts           |  3 +-
 .../navigationBarItemsBindingPatterns.ts      |  3 +-
 ...ionBarItemsBindingPatternsInConstructor.ts |  3 +-
 .../navigationBarItemsEmptyConstructors.ts    |  3 +-
 .../fourslash/navigationBarItemsExports.ts    |  3 +-
 .../fourslash/navigationBarItemsFunctions.ts  |  4 +-
 .../navigationBarItemsFunctionsBroken.ts      |  4 +-
 .../navigationBarItemsFunctionsBroken2.ts     |  4 +-
 .../fourslash/navigationBarItemsImports.ts    |  3 +-
 ...ionBarItemsInsideMethodsAndConstructors.ts |  6 +--
 .../fourslash/navigationBarItemsItems.ts      |  3 +-
 .../fourslash/navigationBarItemsItems2.ts     |  5 +-
 ...rItemsItemsContainsNoAnonymousFunctions.ts | 12 ++---
 .../navigationBarItemsItemsExternalModules.ts |  3 +-
 ...navigationBarItemsItemsExternalModules2.ts |  3 +-
 ...navigationBarItemsItemsExternalModules3.ts |  3 +-
 .../navigationBarItemsItemsModuleVariables.ts |  6 +--
 .../navigationBarItemsMissingName1.ts         |  3 +-
 .../navigationBarItemsMissingName2.ts         |  4 +-
 .../fourslash/navigationBarItemsModules.ts    |  5 +-
 ...ationBarItemsMultilineStringIdentifiers.ts |  6 +--
 ...BarItemsPropertiesDefinedInConstructors.ts |  3 +-
 .../fourslash/navigationBarItemsSymbols1.ts   |  3 +-
 .../fourslash/navigationBarItemsSymbols2.ts   |  3 +-
 .../fourslash/navigationBarItemsSymbols3.ts   |  4 +-
 .../fourslash/navigationBarItemsTypeAlias.ts  |  4 +-
 tests/cases/fourslash/server/navbar01.ts      | 15 ++----
 .../shims-pp/getNavigationBarItems.ts         |  3 +-
 .../fourslash/shims/getNavigationBarItems.ts  |  3 +-
 35 files changed, 58 insertions(+), 149 deletions(-)

diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index 53aaa8c7d6e..4a756ab3b1e 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -1960,46 +1960,24 @@ namespace FourSlash {
         }
 
         public verifyNavigationBar(json: any) {
-            let items = this.languageService.getNavigationBarItems(this.activeFile.fileName);
-            items = this.simplifyNavigationBar(items);
-            if (JSON.stringify(items) !== JSON.stringify(json)) {
-                this.raiseError(`verifyNavigationBar failed - expected: ${JSON.stringify(json, undefined, 2)}, got: ${JSON.stringify(items, undefined, 2)}`);
+            const items = this.languageService.getNavigationBarItems(this.activeFile.fileName);
+            if (JSON.stringify(items, replacer) !== JSON.stringify(json)) {
+                this.raiseError(`verifyNavigationBar failed - expected: ${JSON.stringify(json, undefined, 2)}, got: ${JSON.stringify(items, replacer, 2)}`);
             }
-        }
 
-        // Remove any properties that tend to all have the same value so that test data is easier to read.
-        private simplifyNavigationBar(items: ts.NavigationBarItem[]): any {
-            return items.map(item => {
-                item = ts.clone(item);
-                if (item.kindModifiers === "") {
-                    delete item.kindModifiers;
+            // Make the data easier to read.
+            function replacer(key: string, value: any) {
+                switch (key) {
+                    case "spans":
+                        // We won't ever check this.
+                        return undefined;
+                    case "childItems":
+                        return value.length === 0 ? undefined : value;
+                    default:
+                        // Omit falsy values, those are presumed to be the default.
+                        return value || undefined;
                 }
-                // We won't check this.
-                delete item.spans;
-                item.childItems = item.childItems.map(child => {
-                    child = ts.clone(child);
-                    delete child.spans;
-                    ts.Debug.assert(child.childItems.length === 0);
-                    delete child.childItems;
-                    ts.Debug.assert(child.indent === 0);
-                    delete child.indent;
-                    ts.Debug.assert(child.bolded === false);
-                    delete child.bolded;
-                    ts.Debug.assert(child.grayed === false);
-                    delete child.grayed;
-                    if (child.kindModifiers === "") {
-                        delete child.kindModifiers;
-                    }
-                    return child;
-                });
-                if (item.bolded === false) {
-                    delete item.bolded;
-                }
-                if (item.grayed === false) {
-                    delete item.grayed;
-                }
-                return item;
-            });
+            }
         }
 
         public printNavigationItems(searchValue: string) {
diff --git a/tests/cases/fourslash/deleteClassWithEnumPresent.ts b/tests/cases/fourslash/deleteClassWithEnumPresent.ts
index d8d4478afe7..17d2adae0b1 100644
--- a/tests/cases/fourslash/deleteClassWithEnumPresent.ts
+++ b/tests/cases/fourslash/deleteClassWithEnumPresent.ts
@@ -14,8 +14,7 @@ verify.navigationBar([
                 "text": "Foo",
                 "kind": "enum"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "Foo",
diff --git a/tests/cases/fourslash/getNavigationBarItems.ts b/tests/cases/fourslash/getNavigationBarItems.ts
index a2b0492514a..c3b519fe114 100644
--- a/tests/cases/fourslash/getNavigationBarItems.ts
+++ b/tests/cases/fourslash/getNavigationBarItems.ts
@@ -14,8 +14,7 @@ verify.navigationBar([
                 "text": "C",
                 "kind": "class"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "C",
diff --git a/tests/cases/fourslash/navbar_const.ts b/tests/cases/fourslash/navbar_const.ts
index 02a10f46a74..6ec594a2873 100644
--- a/tests/cases/fourslash/navbar_const.ts
+++ b/tests/cases/fourslash/navbar_const.ts
@@ -11,7 +11,6 @@ verify.navigationBar([
                 "text": "c",
                 "kind": "const"
             }
-        ],
-        "indent": 0
+        ]
     }
 ]);
diff --git a/tests/cases/fourslash/navbar_contains-no-duplicates.ts b/tests/cases/fourslash/navbar_contains-no-duplicates.ts
index 333130ff795..e259a7bef90 100644
--- a/tests/cases/fourslash/navbar_contains-no-duplicates.ts
+++ b/tests/cases/fourslash/navbar_contains-no-duplicates.ts
@@ -45,8 +45,7 @@ verify.navigationBar([
                 "kind": "module",
                 "kindModifiers": "declare"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "ABC",
diff --git a/tests/cases/fourslash/navbar_exportDefault.ts b/tests/cases/fourslash/navbar_exportDefault.ts
index 7c666589f12..dc99cff7d64 100644
--- a/tests/cases/fourslash/navbar_exportDefault.ts
+++ b/tests/cases/fourslash/navbar_exportDefault.ts
@@ -16,15 +16,12 @@ goTo.file("a.ts");
 verify.navigationBar([
     {
         "text": "\"a\"",
-        "kind": "module",
-        "childItems": [],
-        "indent": 0
+        "kind": "module"
     },
     {
         "text": "default",
         "kind": "class",
         "kindModifiers": "export",
-        "childItems": [],
         "indent": 1
     }
 ]);
@@ -40,14 +37,12 @@ verify.navigationBar([
                 "kind": "class",
                 "kindModifiers": "export"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "C",
         "kind": "class",
         "kindModifiers": "export",
-        "childItems": [],
         "indent": 1
     }
 ]);
@@ -57,14 +52,11 @@ verify.navigationBar([
     {
         "text": "\"c\"",
         "kind": "module",
-        "childItems": [],
-        "indent": 0
     },
     {
         "text": "default",
         "kind": "function",
         "kindModifiers": "export",
-        "childItems": [],
         "indent": 1
     }
 ]);
@@ -80,14 +72,12 @@ verify.navigationBar([
                 "kind": "function",
                 "kindModifiers": "export"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "Func",
         "kind": "function",
         "kindModifiers": "export",
-        "childItems": [],
         "indent": 1
     }
 ]);
diff --git a/tests/cases/fourslash/navbar_let.ts b/tests/cases/fourslash/navbar_let.ts
index dc9d9c07857..7ccd61cdfd6 100644
--- a/tests/cases/fourslash/navbar_let.ts
+++ b/tests/cases/fourslash/navbar_let.ts
@@ -11,7 +11,6 @@ verify.navigationBar([
                 "text": "c",
                 "kind": "let"
             }
-        ],
-        "indent": 0
+        ]
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsBindingPatterns.ts b/tests/cases/fourslash/navigationBarItemsBindingPatterns.ts
index 007a9c9b804..849f918f473 100644
--- a/tests/cases/fourslash/navigationBarItemsBindingPatterns.ts
+++ b/tests/cases/fourslash/navigationBarItemsBindingPatterns.ts
@@ -55,7 +55,6 @@ verify.navigationBar([
                 "text": "g",
                 "kind": "var"
             }
-        ],
-        "indent": 0
+        ]
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsBindingPatternsInConstructor.ts b/tests/cases/fourslash/navigationBarItemsBindingPatternsInConstructor.ts
index 41751f5c74b..0ae3e692aa1 100644
--- a/tests/cases/fourslash/navigationBarItemsBindingPatternsInConstructor.ts
+++ b/tests/cases/fourslash/navigationBarItemsBindingPatternsInConstructor.ts
@@ -24,8 +24,7 @@ verify.navigationBar([
                 "text": "B",
                 "kind": "class"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "A",
diff --git a/tests/cases/fourslash/navigationBarItemsEmptyConstructors.ts b/tests/cases/fourslash/navigationBarItemsEmptyConstructors.ts
index 27c33f6afb2..fd534f4c6db 100644
--- a/tests/cases/fourslash/navigationBarItemsEmptyConstructors.ts
+++ b/tests/cases/fourslash/navigationBarItemsEmptyConstructors.ts
@@ -14,8 +14,7 @@ verify.navigationBar([
                 "text": "Test",
                 "kind": "class"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "Test",
diff --git a/tests/cases/fourslash/navigationBarItemsExports.ts b/tests/cases/fourslash/navigationBarItemsExports.ts
index 79422f96274..3ec9b0a7138 100644
--- a/tests/cases/fourslash/navigationBarItemsExports.ts
+++ b/tests/cases/fourslash/navigationBarItemsExports.ts
@@ -27,7 +27,6 @@ verify.navigationBar([
                 "kind": "alias",
                 "kindModifiers": "export"
             }
-        ],
-        "indent": 0
+        ]
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsFunctions.ts b/tests/cases/fourslash/navigationBarItemsFunctions.ts
index e2260f2ff2b..91546462a25 100644
--- a/tests/cases/fourslash/navigationBarItemsFunctions.ts
+++ b/tests/cases/fourslash/navigationBarItemsFunctions.ts
@@ -27,13 +27,11 @@ verify.navigationBar([
                 "text": "foo",
                 "kind": "function"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "baz",
         "kind": "function",
-        "childItems": [],
         "indent": 1
     },
     {
diff --git a/tests/cases/fourslash/navigationBarItemsFunctionsBroken.ts b/tests/cases/fourslash/navigationBarItemsFunctionsBroken.ts
index dc84b50ff30..96dcbb944ae 100644
--- a/tests/cases/fourslash/navigationBarItemsFunctionsBroken.ts
+++ b/tests/cases/fourslash/navigationBarItemsFunctionsBroken.ts
@@ -13,13 +13,11 @@ verify.navigationBar([
                 "text": "f",
                 "kind": "function"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "f",
         "kind": "function",
-        "childItems": [],
         "indent": 1
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsFunctionsBroken2.ts b/tests/cases/fourslash/navigationBarItemsFunctionsBroken2.ts
index b4612efcac0..127bde8c9e7 100644
--- a/tests/cases/fourslash/navigationBarItemsFunctionsBroken2.ts
+++ b/tests/cases/fourslash/navigationBarItemsFunctionsBroken2.ts
@@ -14,13 +14,11 @@ verify.navigationBar([
                 "text": "f",
                 "kind": "function"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "f",
         "kind": "function",
-        "childItems": [],
         "indent": 1
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsImports.ts b/tests/cases/fourslash/navigationBarItemsImports.ts
index d6526a7a68c..ed398ec7f1d 100644
--- a/tests/cases/fourslash/navigationBarItemsImports.ts
+++ b/tests/cases/fourslash/navigationBarItemsImports.ts
@@ -51,7 +51,6 @@ verify.navigationBar([
                 "text": "ns",
                 "kind": "alias"
             }
-        ],
-        "indent": 0
+        ]
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts b/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
index 7d2fb4ed127..28ec25c6f1d 100644
--- a/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
+++ b/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
@@ -27,8 +27,7 @@ verify.navigationBar([
                 "text": "Class",
                 "kind": "class"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "Class",
@@ -82,13 +81,11 @@ verify.navigationBar([
     {
         "text": "LocalFunctionInConstructor",
         "kind": "function",
-        "childItems": [],
         "indent": 2
     },
     {
         "text": "LocalInterfaceInConstrcutor",
         "kind": "interface",
-        "childItems": [],
         "indent": 2
     },
     {
@@ -135,7 +132,6 @@ verify.navigationBar([
     {
         "text": "LocalInterfaceInMethod",
         "kind": "interface",
-        "childItems": [],
         "indent": 2
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsItems.ts b/tests/cases/fourslash/navigationBarItemsItems.ts
index 013d28cd402..87da8581734 100644
--- a/tests/cases/fourslash/navigationBarItemsItems.ts
+++ b/tests/cases/fourslash/navigationBarItemsItems.ts
@@ -60,8 +60,7 @@ verify.navigationBar([
                 "text": "Shapes",
                 "kind": "module"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "IPoint",
diff --git a/tests/cases/fourslash/navigationBarItemsItems2.ts b/tests/cases/fourslash/navigationBarItemsItems2.ts
index 27c32531d6b..762531d8778 100644
--- a/tests/cases/fourslash/navigationBarItemsItems2.ts
+++ b/tests/cases/fourslash/navigationBarItemsItems2.ts
@@ -16,20 +16,17 @@ verify.navigationBar([
                 "text": "A",
                 "kind": "module"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "default",
         "kind": "class",
         "kindModifiers": "export",
-        "childItems": [],
         "indent": 1
     },
     {
         "text": "A",
         "kind": "module",
-        "childItems": [],
         "indent": 1
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsItemsContainsNoAnonymousFunctions.ts b/tests/cases/fourslash/navigationBarItemsItemsContainsNoAnonymousFunctions.ts
index 34e4a1c0c89..276e19624c9 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsContainsNoAnonymousFunctions.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsContainsNoAnonymousFunctions.ts
@@ -33,9 +33,7 @@ goTo.marker("file1");
 verify.navigationBar([
     {
         "text": "<global>",
-        "kind": "module",
-        "childItems": [],
-        "indent": 0
+        "kind": "module"
     }
 ]);
 
@@ -49,8 +47,7 @@ verify.navigationBar([
                 "text": "x",
                 "kind": "var"
             }
-        ],
-        "indent": 0
+        ]
     }
 ]);
 
@@ -68,19 +65,16 @@ verify.navigationBar([
                 "text": "foo",
                 "kind": "function"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "bar",
         "kind": "function",
-        "childItems": [],
         "indent": 1
     },
     {
         "text": "foo",
         "kind": "function",
-        "childItems": [],
         "indent": 1
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsItemsExternalModules.ts b/tests/cases/fourslash/navigationBarItemsItemsExternalModules.ts
index f2df772fb19..04091185dd0 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsExternalModules.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsExternalModules.ts
@@ -14,8 +14,7 @@ verify.navigationBar([
                 "kind": "class",
                 "kindModifiers": "export"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "Bar",
diff --git a/tests/cases/fourslash/navigationBarItemsItemsExternalModules2.ts b/tests/cases/fourslash/navigationBarItemsItemsExternalModules2.ts
index 54d4759afe6..4939091d944 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsExternalModules2.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsExternalModules2.ts
@@ -21,8 +21,7 @@ verify.navigationBar([
                 "kind": "var",
                 "kindModifiers": "export"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "Bar",
diff --git a/tests/cases/fourslash/navigationBarItemsItemsExternalModules3.ts b/tests/cases/fourslash/navigationBarItemsItemsExternalModules3.ts
index 2db04c980d2..5ee760fabc6 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsExternalModules3.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsExternalModules3.ts
@@ -21,8 +21,7 @@ verify.navigationBar([
                 "kind": "var",
                 "kindModifiers": "export"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "Bar",
diff --git a/tests/cases/fourslash/navigationBarItemsItemsModuleVariables.ts b/tests/cases/fourslash/navigationBarItemsItemsModuleVariables.ts
index ef4022ce046..6b85d481612 100644
--- a/tests/cases/fourslash/navigationBarItemsItemsModuleVariables.ts
+++ b/tests/cases/fourslash/navigationBarItemsItemsModuleVariables.ts
@@ -29,8 +29,7 @@ verify.navigationBar([
                 "text": "Module1",
                 "kind": "module"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "Module1",
@@ -56,8 +55,7 @@ verify.navigationBar([
                 "text": "Module1.SubModule",
                 "kind": "module"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "Module1.SubModule",
diff --git a/tests/cases/fourslash/navigationBarItemsMissingName1.ts b/tests/cases/fourslash/navigationBarItemsMissingName1.ts
index 4738cc45063..af0e89683bc 100644
--- a/tests/cases/fourslash/navigationBarItemsMissingName1.ts
+++ b/tests/cases/fourslash/navigationBarItemsMissingName1.ts
@@ -12,8 +12,7 @@ verify.navigationBar([
                 "text": "C",
                 "kind": "class"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "C",
diff --git a/tests/cases/fourslash/navigationBarItemsMissingName2.ts b/tests/cases/fourslash/navigationBarItemsMissingName2.ts
index f4a37cf1154..2eda3b07855 100644
--- a/tests/cases/fourslash/navigationBarItemsMissingName2.ts
+++ b/tests/cases/fourslash/navigationBarItemsMissingName2.ts
@@ -9,9 +9,7 @@
 verify.navigationBar([
     {
         "text": "<global>",
-        "kind": "module",
-        "childItems": [],
-        "indent": 0
+        "kind": "module"
     },
     {
         "text": "default",
diff --git a/tests/cases/fourslash/navigationBarItemsModules.ts b/tests/cases/fourslash/navigationBarItemsModules.ts
index c3b8aef08eb..979f22084e5 100644
--- a/tests/cases/fourslash/navigationBarItemsModules.ts
+++ b/tests/cases/fourslash/navigationBarItemsModules.ts
@@ -54,8 +54,7 @@ verify.navigationBar([
         "kind": "module",
         "kindModifiers": "declare"
       }
-    ],
-    "indent": 0
+    ]
   },
   {
     "text": "A.B.C",
@@ -124,14 +123,12 @@ verify.navigationBar([
     "text": "\"X.Y.Z\"",
     "kind": "module",
     "kindModifiers": "declare",
-    "childItems": [],
     "indent": 1
   },
   {
     "text": "'X2.Y2.Z2'",
     "kind": "module",
     "kindModifiers": "declare",
-    "childItems": [],
     "indent": 1
   }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
index c2e43f5f7b7..2ee4c93a2f1 100644
--- a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
+++ b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
@@ -52,8 +52,7 @@ verify.navigationBar([
                 "kind": "module",
                 "kindModifiers": "declare"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "Bar",
@@ -89,21 +88,18 @@ verify.navigationBar([
         "text": "\"Multiline\\r\\nMadness\"",
         "kind": "module",
         "kindModifiers": "declare",
-        "childItems": [],
         "indent": 1
     },
     {
         "text": "\"Multiline\\\nMadness\"",
         "kind": "module",
         "kindModifiers": "declare",
-        "childItems": [],
         "indent": 1
     },
     {
         "text": "\"MultilineMadness\"",
         "kind": "module",
         "kindModifiers": "declare",
-        "childItems": [],
         "indent": 1
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts b/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts
index d99d3bce9eb..9e5a48370c1 100644
--- a/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts
+++ b/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts
@@ -15,8 +15,7 @@ verify.navigationBar([
                 "text": "List",
                 "kind": "class"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "List",
diff --git a/tests/cases/fourslash/navigationBarItemsSymbols1.ts b/tests/cases/fourslash/navigationBarItemsSymbols1.ts
index 8c565447c19..53f4c7af445 100644
--- a/tests/cases/fourslash/navigationBarItemsSymbols1.ts
+++ b/tests/cases/fourslash/navigationBarItemsSymbols1.ts
@@ -15,8 +15,7 @@ verify.navigationBar([
                 "text": "C",
                 "kind": "class"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "C",
diff --git a/tests/cases/fourslash/navigationBarItemsSymbols2.ts b/tests/cases/fourslash/navigationBarItemsSymbols2.ts
index d747b5dadaa..2674047f9c0 100644
--- a/tests/cases/fourslash/navigationBarItemsSymbols2.ts
+++ b/tests/cases/fourslash/navigationBarItemsSymbols2.ts
@@ -14,8 +14,7 @@ verify.navigationBar([
                 "text": "I",
                 "kind": "interface"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "I",
diff --git a/tests/cases/fourslash/navigationBarItemsSymbols3.ts b/tests/cases/fourslash/navigationBarItemsSymbols3.ts
index 29ff9f277a3..9564c496dd8 100644
--- a/tests/cases/fourslash/navigationBarItemsSymbols3.ts
+++ b/tests/cases/fourslash/navigationBarItemsSymbols3.ts
@@ -14,13 +14,11 @@ verify.navigationBar([
                 "text": "E",
                 "kind": "enum"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "E",
         "kind": "enum",
-        "childItems": [],
         "indent": 1
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsTypeAlias.ts b/tests/cases/fourslash/navigationBarItemsTypeAlias.ts
index 4973e84b2ed..8ff9854ac16 100644
--- a/tests/cases/fourslash/navigationBarItemsTypeAlias.ts
+++ b/tests/cases/fourslash/navigationBarItemsTypeAlias.ts
@@ -11,13 +11,11 @@ verify.navigationBar([
                 "text": "T",
                 "kind": "type"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "T",
         "kind": "type",
-        "childItems": [],
         "indent": 1
     }
 ]);
diff --git a/tests/cases/fourslash/server/navbar01.ts b/tests/cases/fourslash/server/navbar01.ts
index ed8ed2d8563..7f2229fcb81 100644
--- a/tests/cases/fourslash/server/navbar01.ts
+++ b/tests/cases/fourslash/server/navbar01.ts
@@ -59,8 +59,7 @@ verify.navigationBar([
                 "text": "Shapes",
                 "kind": "module"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "IPoint",
@@ -86,8 +85,7 @@ verify.navigationBar([
                 "text": "prop",
                 "kind": "property"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "Shapes",
@@ -102,8 +100,7 @@ verify.navigationBar([
                 "text": "Values",
                 "kind": "enum"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "Point",
@@ -146,8 +143,7 @@ verify.navigationBar([
                 "kind": "property",
                 "kindModifiers": "public"
             }
-        ],
-        "indent": 0
+        ]
     },
     {
         "text": "Values",
@@ -165,7 +161,6 @@ verify.navigationBar([
                 "text": "value3",
                 "kind": "property"
             }
-        ],
-        "indent": 0
+        ]
     }
 ]);
diff --git a/tests/cases/fourslash/shims-pp/getNavigationBarItems.ts b/tests/cases/fourslash/shims-pp/getNavigationBarItems.ts
index fe852e03a28..b06d782d8bf 100644
--- a/tests/cases/fourslash/shims-pp/getNavigationBarItems.ts
+++ b/tests/cases/fourslash/shims-pp/getNavigationBarItems.ts
@@ -11,7 +11,6 @@ verify.navigationBar([
                 "text": "c",
                 "kind": "const"
             }
-        ],
-        "indent": 0
+        ]
     }
 ]);
diff --git a/tests/cases/fourslash/shims/getNavigationBarItems.ts b/tests/cases/fourslash/shims/getNavigationBarItems.ts
index fe852e03a28..b06d782d8bf 100644
--- a/tests/cases/fourslash/shims/getNavigationBarItems.ts
+++ b/tests/cases/fourslash/shims/getNavigationBarItems.ts
@@ -11,7 +11,6 @@ verify.navigationBar([
                 "text": "c",
                 "kind": "const"
             }
-        ],
-        "indent": 0
+        ]
     }
 ]);

From eab25119898cde36f1e7c1bc8e35a1aa52696b5c Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Fri, 27 May 2016 09:51:30 -0700
Subject: [PATCH 123/332] update signature of finishWorker

---
 Jakefile.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Jakefile.js b/Jakefile.js
index f0415635956..474303a9722 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -759,7 +759,7 @@ function runConsoleTests(defaultReporter, runInParallel) {
                 exec(workerCmd,  finishWorker, finishWorker) 
             });
             
-            function finishWorker(errorStatus) {
+            function finishWorker(e, errorStatus) {
                 counter--;
                 if (firstErrorStatus === undefined && errorStatus !== undefined) {
                     firstErrorStatus = errorStatus;

From f3d1b46dcba63bf70900c9ca607bb1aabf0047dd Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Fri, 27 May 2016 10:40:28 -0700
Subject: [PATCH 124/332] Add tests for private and readonly parameter
 properties in navbar

---
 .../navigationBarItemsPropertiesDefinedInConstructors.ts  | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts b/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts
index 9e5a48370c1..0ea7a0745c2 100644
--- a/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts
+++ b/tests/cases/fourslash/navigationBarItemsPropertiesDefinedInConstructors.ts
@@ -1,7 +1,7 @@
 /// <reference path="fourslash.ts"/>
 
 ////class List<T> {
-////    constructor(public a: boolean, public b: T, c: number) {
+////    constructor(public a: boolean, private b: T, readonly c: string, d: number) {
 ////        var local = 0;
 ////    }
 ////}
@@ -33,7 +33,11 @@ verify.navigationBar([
             {
                 "text": "b",
                 "kind": "property",
-                "kindModifiers": "public"
+                "kindModifiers": "private"
+            },
+            {
+                "text": "c",
+                "kind": "property"
             }
         ],
         "indent": 1

From 92938cd8df88dd89b2cd0791084e0b7fb871a4c9 Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Fri, 27 May 2016 15:38:59 -0700
Subject: [PATCH 125/332] check that default clause is non-empty in
 reachability checks

---
 src/compiler/binder.ts                        |  4 ++--
 .../reachabilityCheckWithEmptyDefault.js      | 18 +++++++++++++++
 .../reachabilityCheckWithEmptyDefault.symbols | 18 +++++++++++++++
 .../reachabilityCheckWithEmptyDefault.types   | 22 +++++++++++++++++++
 .../reachabilityCheckWithEmptyDefault.ts      |  8 +++++++
 5 files changed, 68 insertions(+), 2 deletions(-)
 create mode 100644 tests/baselines/reference/reachabilityCheckWithEmptyDefault.js
 create mode 100644 tests/baselines/reference/reachabilityCheckWithEmptyDefault.symbols
 create mode 100644 tests/baselines/reference/reachabilityCheckWithEmptyDefault.types
 create mode 100644 tests/cases/compiler/reachabilityCheckWithEmptyDefault.ts

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 6f0f1ac7863..fef23770475 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -912,8 +912,8 @@ namespace ts {
             preSwitchCaseFlow = currentFlow;
             bind(node.caseBlock);
             addAntecedent(postSwitchLabel, currentFlow);
-            const hasDefault = forEach(node.caseBlock.clauses, c => c.kind === SyntaxKind.DefaultClause);
-            if (!hasDefault) {
+            const hasNonEmptyDefault = forEach(node.caseBlock.clauses, c => c.kind === SyntaxKind.DefaultClause && c.statements.length);
+            if (!hasNonEmptyDefault) {
                 addAntecedent(postSwitchLabel, preSwitchCaseFlow);
             }
             currentBreakTarget = saveBreakTarget;
diff --git a/tests/baselines/reference/reachabilityCheckWithEmptyDefault.js b/tests/baselines/reference/reachabilityCheckWithEmptyDefault.js
new file mode 100644
index 00000000000..0096d2d2f9a
--- /dev/null
+++ b/tests/baselines/reference/reachabilityCheckWithEmptyDefault.js
@@ -0,0 +1,18 @@
+//// [reachabilityCheckWithEmptyDefault.ts]
+declare function print(s: string): void;
+function foo(x: any) {
+	switch(x) {
+		case 1: return;
+		default:
+	}
+	print('1');
+}
+
+//// [reachabilityCheckWithEmptyDefault.js]
+function foo(x) {
+    switch (x) {
+        case 1: return;
+        default:
+    }
+    print('1');
+}
diff --git a/tests/baselines/reference/reachabilityCheckWithEmptyDefault.symbols b/tests/baselines/reference/reachabilityCheckWithEmptyDefault.symbols
new file mode 100644
index 00000000000..d3123c0e8ba
--- /dev/null
+++ b/tests/baselines/reference/reachabilityCheckWithEmptyDefault.symbols
@@ -0,0 +1,18 @@
+=== tests/cases/compiler/reachabilityCheckWithEmptyDefault.ts ===
+declare function print(s: string): void;
+>print : Symbol(print, Decl(reachabilityCheckWithEmptyDefault.ts, 0, 0))
+>s : Symbol(s, Decl(reachabilityCheckWithEmptyDefault.ts, 0, 23))
+
+function foo(x: any) {
+>foo : Symbol(foo, Decl(reachabilityCheckWithEmptyDefault.ts, 0, 40))
+>x : Symbol(x, Decl(reachabilityCheckWithEmptyDefault.ts, 1, 13))
+
+	switch(x) {
+>x : Symbol(x, Decl(reachabilityCheckWithEmptyDefault.ts, 1, 13))
+
+		case 1: return;
+		default:
+	}
+	print('1');
+>print : Symbol(print, Decl(reachabilityCheckWithEmptyDefault.ts, 0, 0))
+}
diff --git a/tests/baselines/reference/reachabilityCheckWithEmptyDefault.types b/tests/baselines/reference/reachabilityCheckWithEmptyDefault.types
new file mode 100644
index 00000000000..3d01b876473
--- /dev/null
+++ b/tests/baselines/reference/reachabilityCheckWithEmptyDefault.types
@@ -0,0 +1,22 @@
+=== tests/cases/compiler/reachabilityCheckWithEmptyDefault.ts ===
+declare function print(s: string): void;
+>print : (s: string) => void
+>s : string
+
+function foo(x: any) {
+>foo : (x: any) => void
+>x : any
+
+	switch(x) {
+>x : any
+
+		case 1: return;
+>1 : number
+
+		default:
+	}
+	print('1');
+>print('1') : void
+>print : (s: string) => void
+>'1' : string
+}
diff --git a/tests/cases/compiler/reachabilityCheckWithEmptyDefault.ts b/tests/cases/compiler/reachabilityCheckWithEmptyDefault.ts
new file mode 100644
index 00000000000..6429528a0da
--- /dev/null
+++ b/tests/cases/compiler/reachabilityCheckWithEmptyDefault.ts
@@ -0,0 +1,8 @@
+declare function print(s: string): void;
+function foo(x: any) {
+	switch(x) {
+		case 1: return;
+		default:
+	}
+	print('1');
+}
\ No newline at end of file

From e8ecf0e615ca552b7355740cd91cae6f8ed7b74e Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sat, 28 May 2016 06:43:28 -0700
Subject: [PATCH 126/332] Track return statements in IIFE using a flow label

---
 src/compiler/binder.ts    | 83 +++++++++++++++++++++++++--------------
 src/compiler/checker.ts   | 63 ++++++++++-------------------
 src/compiler/types.ts     |  1 +
 src/compiler/utilities.ts | 14 +++++++
 4 files changed, 89 insertions(+), 72 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 2476709b501..93417493fa7 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -104,14 +104,15 @@ namespace ts {
         let seenThisKeyword: boolean;
 
         // state used by reachability checks
-        let hasExplicitReturn: boolean;
         let currentFlow: FlowNode;
         let currentBreakTarget: FlowLabel;
         let currentContinueTarget: FlowLabel;
+        let currentReturnTarget: FlowLabel;
         let currentTrueTarget: FlowLabel;
         let currentFalseTarget: FlowLabel;
         let preSwitchCaseFlow: FlowNode;
         let activeLabels: ActiveLabel[];
+        let hasExplicitReturn: boolean;
 
         // state used for emit helpers
         let hasClassExtends: boolean;
@@ -156,13 +157,14 @@ namespace ts {
             blockScopeContainer = undefined;
             lastContainer = undefined;
             seenThisKeyword = false;
-            hasExplicitReturn = false;
             currentFlow = undefined;
             currentBreakTarget = undefined;
             currentContinueTarget = undefined;
+            currentReturnTarget = undefined;
             currentTrueTarget = undefined;
             currentFalseTarget = undefined;
             activeLabels = undefined;
+            hasExplicitReturn = false;
             hasClassExtends = false;
             hasAsyncFunctions = false;
             hasDecorators = false;
@@ -443,20 +445,20 @@ namespace ts {
                 blockScopeContainer.locals = undefined;
             }
 
-            let savedHasExplicitReturn: boolean;
-            let savedCurrentFlow: FlowNode;
-            let savedBreakTarget: FlowLabel;
-            let savedContinueTarget: FlowLabel;
-            let savedActiveLabels: ActiveLabel[];
+            let saveCurrentFlow: FlowNode;
+            let saveBreakTarget: FlowLabel;
+            let saveContinueTarget: FlowLabel;
+            let saveReturnTarget: FlowLabel;
+            let saveActiveLabels: ActiveLabel[];
+            let saveHasExplicitReturn: boolean;
+            let isIIFE: boolean;
 
             const kind = node.kind;
             let flags = node.flags;
 
-            // reset all reachability check related flags on node (for incremental scenarios)
-            flags &= ~NodeFlags.ReachabilityCheckFlags;
-
-            // reset all emit helper flags on node (for incremental scenarios)
-            flags &= ~NodeFlags.EmitHelperFlags;
+            // Reset all reachability check related flags on node (for incremental scenarios)
+            // Reset all emit helper flags on node (for incremental scenarios)
+            flags &= ~NodeFlags.ReachabilityAndEmitFlags;
 
             if (kind === SyntaxKind.InterfaceDeclaration) {
                 seenThisKeyword = false;
@@ -464,23 +466,30 @@ namespace ts {
 
             const saveState = kind === SyntaxKind.SourceFile || kind === SyntaxKind.ModuleBlock || isFunctionLikeKind(kind);
             if (saveState) {
-                savedHasExplicitReturn = hasExplicitReturn;
-                savedCurrentFlow = currentFlow;
-                savedBreakTarget = currentBreakTarget;
-                savedContinueTarget = currentContinueTarget;
-                savedActiveLabels = activeLabels;
-
-                hasExplicitReturn = false;
-                currentFlow = { flags: FlowFlags.Start };
-                if (kind === SyntaxKind.FunctionExpression || kind === SyntaxKind.ArrowFunction) {
-                    (<FlowStart>currentFlow).container = <FunctionExpression | ArrowFunction>node;
+                saveCurrentFlow = currentFlow;
+                saveBreakTarget = currentBreakTarget;
+                saveContinueTarget = currentContinueTarget;
+                saveReturnTarget = currentReturnTarget;
+                saveActiveLabels = activeLabels;
+                saveHasExplicitReturn = hasExplicitReturn;
+                isIIFE = (kind === SyntaxKind.FunctionExpression || kind === SyntaxKind.ArrowFunction) && !!getImmediatelyInvokedFunctionExpression(node);
+                if (isIIFE) {
+                    currentReturnTarget = createBranchLabel();
+                }
+                else {
+                    currentFlow = { flags: FlowFlags.Start };
+                    if (kind === SyntaxKind.FunctionExpression || kind === SyntaxKind.ArrowFunction) {
+                        (<FlowStart>currentFlow).container = <FunctionExpression | ArrowFunction>node;
+                    }
+                    currentReturnTarget = undefined;
                 }
                 currentBreakTarget = undefined;
                 currentContinueTarget = undefined;
                 activeLabels = undefined;
+                hasExplicitReturn = false;
             }
 
-            if (isInJavaScriptFile(node) && node.jsDocComment) {
+            if (node.flags & NodeFlags.JavaScriptFile && node.jsDocComment) {
                 bind(node.jsDocComment);
             }
 
@@ -518,11 +527,18 @@ namespace ts {
             node.flags = flags;
 
             if (saveState) {
-                hasExplicitReturn = savedHasExplicitReturn;
-                currentFlow = savedCurrentFlow;
-                currentBreakTarget = savedBreakTarget;
-                currentContinueTarget = savedContinueTarget;
-                activeLabels = savedActiveLabels;
+                if (isIIFE) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                    currentFlow = finishFlowLabel(currentReturnTarget);
+                }
+                else {
+                    currentFlow = saveCurrentFlow;
+                }
+                currentBreakTarget = saveBreakTarget;
+                currentContinueTarget = saveContinueTarget;
+                currentReturnTarget = saveReturnTarget;
+                activeLabels = saveActiveLabels;
+                hasExplicitReturn = saveHasExplicitReturn;
             }
 
             container = saveContainer;
@@ -854,6 +870,9 @@ namespace ts {
             bind(node.expression);
             if (node.kind === SyntaxKind.ReturnStatement) {
                 hasExplicitReturn = true;
+                if (currentReturnTarget) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                }
             }
             currentFlow = unreachableFlow;
         }
@@ -1105,7 +1124,6 @@ namespace ts {
         }
 
         function bindCallExpressionFlow(node: CallExpression) {
-            forEachChild(node, bind);
             // If the target of the call expression is a function expression or arrow function we have
             // an immediately invoked function expression (IIFE). Initialize the flowNode property to
             // the current control flow (which includes evaluation of the IIFE arguments).
@@ -1114,7 +1132,12 @@ namespace ts {
                 expr = (<ParenthesizedExpression>expr).expression;
             }
             if (expr.kind === SyntaxKind.FunctionExpression || expr.kind === SyntaxKind.ArrowFunction) {
-                node.flowNode = currentFlow;
+                forEach(node.typeArguments, bind);
+                forEach(node.arguments, bind);
+                bind(node.expression);
+            }
+            else {
+                forEachChild(node, bind);
             }
         }
 
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 58aaae9f72b..037ab78413a 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7695,20 +7695,11 @@ namespace ts {
                             getTypeAtFlowLoopLabel(<FlowLabel>flow);
                     }
                     else if (flow.flags & FlowFlags.Start) {
+                        // Check if we should continue with the control flow of the containing function.
                         const container = (<FlowStart>flow).container;
-                        if (container) {
-                            // If container is an IIFE continue with the control flow associated with the
-                            // call expression node.
-                            const iife = getImmediatelyInvokedFunctionExpression(<FunctionExpression>container);
-                            if (iife && iife.flowNode) {
-                                flow = iife.flowNode;
-                                continue;
-                            }
-                            // Check if we should continue with the control flow of the containing function.
-                            if (includeOuterFunctions && container.flowNode) {
-                                flow = container.flowNode;
-                                continue;
-                            }
+                        if (container && includeOuterFunctions) {
+                            flow = container.flowNode;
+                            continue;
                         }
                         // At the top of the flow we have the initial type.
                         type = initialType;
@@ -8652,23 +8643,25 @@ namespace ts {
         function getContextuallyTypedParameterType(parameter: ParameterDeclaration): Type {
             const func = parameter.parent;
             if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
-                const iife = getImmediatelyInvokedFunctionExpression(func);
-                if (iife) {
-                    const indexOfParameter = indexOf(func.parameters, parameter);
-                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
-                        if (parameter.dotDotDotToken) {
-                            const restTypes: Type[] = [];
-                            for (let i = indexOfParameter; i < iife.arguments.length; i++) {
-                                restTypes.push(getTypeOfExpression(iife.arguments[i]));
+                if (func.kind === SyntaxKind.FunctionExpression || func.kind === SyntaxKind.ArrowFunction) {
+                    const iife = getImmediatelyInvokedFunctionExpression(func);
+                    if (iife) {
+                        const indexOfParameter = indexOf(func.parameters, parameter);
+                        if (iife.arguments && indexOfParameter < iife.arguments.length) {
+                            if (parameter.dotDotDotToken) {
+                                const restTypes: Type[] = [];
+                                for (let i = indexOfParameter; i < iife.arguments.length; i++) {
+                                    restTypes.push(getTypeOfExpression(iife.arguments[i]));
+                                }
+                                return createArrayType(getUnionType(restTypes));
                             }
-                            return createArrayType(getUnionType(restTypes));
+                            const links = getNodeLinks(iife);
+                            const cached = links.resolvedSignature;
+                            links.resolvedSignature = anySignature;
+                            const type = checkExpression(iife.arguments[indexOfParameter]);
+                            links.resolvedSignature = cached;
+                            return type;
                         }
-                        const links = getNodeLinks(iife);
-                        const cached = links.resolvedSignature;
-                        links.resolvedSignature = anySignature;
-                        const type = checkExpression(iife.arguments[indexOfParameter]);
-                        links.resolvedSignature = cached;
-                        return type;
                     }
                 }
                 const contextualSignature = getContextualSignature(func);
@@ -8691,20 +8684,6 @@ namespace ts {
             return undefined;
         }
 
-        function getImmediatelyInvokedFunctionExpression(func: FunctionExpression | MethodDeclaration) {
-            if (isFunctionExpressionOrArrowFunction(func)) {
-                let prev: Node = func;
-                let parent: Node = func.parent;
-                while (parent.kind === SyntaxKind.ParenthesizedExpression) {
-                    prev = parent;
-                    parent = parent.parent;
-                }
-                if (parent.kind === SyntaxKind.CallExpression && (parent as CallExpression).expression === prev) {
-                    return parent as CallExpression;
-                }
-            }
-        }
-
         // In a variable, parameter or property declaration with a type annotation,
         //   the contextual type of an initializer expression is the type of the variable, parameter or property.
         // Otherwise, in a parameter declaration of a contextually typed function expression,
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 762d710d504..4e55956fa7c 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -416,6 +416,7 @@ namespace ts {
 
         ReachabilityCheckFlags = HasImplicitReturn | HasExplicitReturn,
         EmitHelperFlags = HasClassExtends | HasDecorators | HasParamDecorators | HasAsyncFunctions,
+        ReachabilityAndEmitFlags = ReachabilityCheckFlags | EmitHelperFlags,
 
         // Parsing context flags
         ContextFlags = DisallowInContext | YieldContext | DecoratorContext | AwaitContext | JavaScriptFile,
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 7969389d788..500fa722dda 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -987,6 +987,20 @@ namespace ts {
         }
     }
 
+    export function getImmediatelyInvokedFunctionExpression(func: Node): CallExpression {
+        if (func.kind === SyntaxKind.FunctionExpression || func.kind === SyntaxKind.ArrowFunction) {
+            let prev = func;
+            let parent = func.parent;
+            while (parent.kind === SyntaxKind.ParenthesizedExpression) {
+                prev = parent;
+                parent = parent.parent;
+            }
+            if (parent.kind === SyntaxKind.CallExpression && (parent as CallExpression).expression === prev) {
+                return parent as CallExpression;
+            }
+        }
+    }
+
     /**
      * Determines whether a node is a property or element access expression for super.
      */

From 4d730a5c6a6cda260f5e382fa2c4b8cf92cb578c Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sat, 28 May 2016 06:45:10 -0700
Subject: [PATCH 127/332] Update test

---
 tests/baselines/reference/controlFlowIIFE.js           | 2 ++
 tests/baselines/reference/controlFlowIIFE.symbols      | 9 ++++++---
 tests/baselines/reference/controlFlowIIFE.types        | 6 +++++-
 tests/cases/conformance/controlFlow/controlFlowIIFE.ts | 1 +
 4 files changed, 14 insertions(+), 4 deletions(-)

diff --git a/tests/baselines/reference/controlFlowIIFE.js b/tests/baselines/reference/controlFlowIIFE.js
index 6454d1117db..5d295b57315 100644
--- a/tests/baselines/reference/controlFlowIIFE.js
+++ b/tests/baselines/reference/controlFlowIIFE.js
@@ -34,6 +34,7 @@ let maybeNumber: number | undefined;
 (function () {
     maybeNumber = 1;
 })();
+maybeNumber++;
 if (maybeNumber !== undefined) {
     maybeNumber++;
 }
@@ -75,6 +76,7 @@ var maybeNumber;
 (function () {
     maybeNumber = 1;
 })();
+maybeNumber++;
 if (maybeNumber !== undefined) {
     maybeNumber++;
 }
diff --git a/tests/baselines/reference/controlFlowIIFE.symbols b/tests/baselines/reference/controlFlowIIFE.symbols
index 2a03bb3ff2b..b1b2b741158 100644
--- a/tests/baselines/reference/controlFlowIIFE.symbols
+++ b/tests/baselines/reference/controlFlowIIFE.symbols
@@ -82,6 +82,9 @@ let maybeNumber: number | undefined;
 >maybeNumber : Symbol(maybeNumber, Decl(controlFlowIIFE.ts, 31, 3))
 
 })();
+maybeNumber++;
+>maybeNumber : Symbol(maybeNumber, Decl(controlFlowIIFE.ts, 31, 3))
+
 if (maybeNumber !== undefined) {
 >maybeNumber : Symbol(maybeNumber, Decl(controlFlowIIFE.ts, 31, 3))
 >undefined : Symbol(undefined)
@@ -91,10 +94,10 @@ if (maybeNumber !== undefined) {
 }
 
 let test: string | undefined;
->test : Symbol(test, Decl(controlFlowIIFE.ts, 39, 3))
+>test : Symbol(test, Decl(controlFlowIIFE.ts, 40, 3))
 
 if (!test) {
->test : Symbol(test, Decl(controlFlowIIFE.ts, 39, 3))
+>test : Symbol(test, Decl(controlFlowIIFE.ts, 40, 3))
 
     throw new Error('Test is not defined');
 >Error : Symbol(Error, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
@@ -102,7 +105,7 @@ if (!test) {
 (() => {
     test.slice(1); // No error
 >test.slice : Symbol(String.slice, Decl(lib.d.ts, --, --))
->test : Symbol(test, Decl(controlFlowIIFE.ts, 39, 3))
+>test : Symbol(test, Decl(controlFlowIIFE.ts, 40, 3))
 >slice : Symbol(String.slice, Decl(lib.d.ts, --, --))
 
 })();
diff --git a/tests/baselines/reference/controlFlowIIFE.types b/tests/baselines/reference/controlFlowIIFE.types
index 0a6ad5da02f..c041de04bc7 100644
--- a/tests/baselines/reference/controlFlowIIFE.types
+++ b/tests/baselines/reference/controlFlowIIFE.types
@@ -112,9 +112,13 @@ let maybeNumber: number | undefined;
 >1 : number
 
 })();
+maybeNumber++;
+>maybeNumber++ : number
+>maybeNumber : number
+
 if (maybeNumber !== undefined) {
 >maybeNumber !== undefined : boolean
->maybeNumber : number | undefined
+>maybeNumber : number
 >undefined : undefined
 
     maybeNumber++;
diff --git a/tests/cases/conformance/controlFlow/controlFlowIIFE.ts b/tests/cases/conformance/controlFlow/controlFlowIIFE.ts
index e703fb2fdff..c72f038c1ec 100644
--- a/tests/cases/conformance/controlFlow/controlFlowIIFE.ts
+++ b/tests/cases/conformance/controlFlow/controlFlowIIFE.ts
@@ -34,6 +34,7 @@ let maybeNumber: number | undefined;
 (function () {
     maybeNumber = 1;
 })();
+maybeNumber++;
 if (maybeNumber !== undefined) {
     maybeNumber++;
 }

From 66e9f7dc214dc13c936e3cec2a27d3fef56777be Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sat, 28 May 2016 16:00:31 -0700
Subject: [PATCH 128/332] Optimize critical code paths in binder

---
 src/compiler/binder.ts | 213 +++++++++++++++++------------------------
 1 file changed, 87 insertions(+), 126 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 93417493fa7..4f24458f08d 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -77,12 +77,14 @@ namespace ts {
         //      Blocks (when not parented by functions), Catch clauses, For/For-in/For-of statements...
         IsBlockScopedContainer = 1 << 1,
 
-        HasLocals = 1 << 2,
+        // The current node is the container of a control flow path. The current control flow should
+        // be saved and restored, and a new control flow initialized within the container.
+        IsControlFlowContainer = 1 << 2,
 
-        // If the current node is a container that also container that also contains locals.  Examples:
-        //
-        //      Functions, Methods, Modules, Source-files.
-        IsContainerWithLocals = IsContainer | HasLocals
+        IsFunctionLike = 1 << 3,
+        IsFunctionExpression = 1 << 4,
+        HasLocals = 1 << 5,
+        IsInterface = 1 << 6,
     }
 
     const binder = createBinder();
@@ -103,7 +105,7 @@ namespace ts {
         let lastContainer: Node;
         let seenThisKeyword: boolean;
 
-        // state used by reachability checks
+        // state used by control flow analysis
         let currentFlow: FlowNode;
         let currentBreakTarget: FlowLabel;
         let currentContinueTarget: FlowLabel;
@@ -115,11 +117,7 @@ namespace ts {
         let hasExplicitReturn: boolean;
 
         // state used for emit helpers
-        let hasClassExtends: boolean;
-        let hasAsyncFunctions: boolean;
-        let hasDecorators: boolean;
-        let hasParameterDecorators: boolean;
-        let hasJsxSpreadAttribute: boolean;
+        let emitFlags: NodeFlags;
 
         // If this file is an external module, then it is automatically in strict-mode according to
         // ES6.  If it is not an external module, then we'll determine if it is in strict mode or
@@ -165,11 +163,7 @@ namespace ts {
             currentFalseTarget = undefined;
             activeLabels = undefined;
             hasExplicitReturn = false;
-            hasClassExtends = false;
-            hasAsyncFunctions = false;
-            hasDecorators = false;
-            hasParameterDecorators = false;
-            hasJsxSpreadAttribute = false;
+            emitFlags = NodeFlags.None;
         }
 
         return bindSourceFile;
@@ -402,17 +396,12 @@ namespace ts {
         // All container nodes are kept on a linked list in declaration order. This list is used by
         // the getLocalNameOfContainer function in the type checker to validate that the local name
         // used for a container is unique.
-        function bindChildren(node: Node) {
+        function bindContainer(node: Node, containerFlags: ContainerFlags) {
             // Before we recurse into a node's children, we first save the existing parent, container
             // and block-container.  Then after we pop out of processing the children, we restore
             // these saved values.
-            const saveParent = parent;
             const saveContainer = container;
             const savedBlockScopeContainer = blockScopeContainer;
-
-            // This node will now be set as the parent of all of its children as we recurse into them.
-            parent = node;
-
             // Depending on what kind of node this is, we may have to adjust the current container
             // and block-container.   If the current node is a container, then it is automatically
             // considered the current block-container as well.  Also, for containers that we know
@@ -430,55 +419,33 @@ namespace ts {
             // reusing a node from a previous compilation, that node may have had 'locals' created
             // for it.  We must clear this so we don't accidentally move any stale data forward from
             // a previous compilation.
-            const containerFlags = getContainerFlags(node);
             if (containerFlags & ContainerFlags.IsContainer) {
                 container = blockScopeContainer = node;
-
                 if (containerFlags & ContainerFlags.HasLocals) {
                     container.locals = {};
                 }
-
                 addToContainerChain(container);
             }
             else if (containerFlags & ContainerFlags.IsBlockScopedContainer) {
                 blockScopeContainer = node;
                 blockScopeContainer.locals = undefined;
             }
-
-            let saveCurrentFlow: FlowNode;
-            let saveBreakTarget: FlowLabel;
-            let saveContinueTarget: FlowLabel;
-            let saveReturnTarget: FlowLabel;
-            let saveActiveLabels: ActiveLabel[];
-            let saveHasExplicitReturn: boolean;
-            let isIIFE: boolean;
-
-            const kind = node.kind;
-            let flags = node.flags;
-
-            // Reset all reachability check related flags on node (for incremental scenarios)
-            // Reset all emit helper flags on node (for incremental scenarios)
-            flags &= ~NodeFlags.ReachabilityAndEmitFlags;
-
-            if (kind === SyntaxKind.InterfaceDeclaration) {
-                seenThisKeyword = false;
-            }
-
-            const saveState = kind === SyntaxKind.SourceFile || kind === SyntaxKind.ModuleBlock || isFunctionLikeKind(kind);
-            if (saveState) {
-                saveCurrentFlow = currentFlow;
-                saveBreakTarget = currentBreakTarget;
-                saveContinueTarget = currentContinueTarget;
-                saveReturnTarget = currentReturnTarget;
-                saveActiveLabels = activeLabels;
-                saveHasExplicitReturn = hasExplicitReturn;
-                isIIFE = (kind === SyntaxKind.FunctionExpression || kind === SyntaxKind.ArrowFunction) && !!getImmediatelyInvokedFunctionExpression(node);
+            if (containerFlags & ContainerFlags.IsControlFlowContainer) {
+                const saveCurrentFlow = currentFlow;
+                const saveBreakTarget = currentBreakTarget;
+                const saveContinueTarget = currentContinueTarget;
+                const saveReturnTarget = currentReturnTarget;
+                const saveActiveLabels = activeLabels;
+                const saveHasExplicitReturn = hasExplicitReturn;
+                const isIIFE = containerFlags & ContainerFlags.IsFunctionExpression && !!getImmediatelyInvokedFunctionExpression(node);
+                // An IIFE is considered part of the containing control flow. Return statements behave
+                // similarly to break statements that exit to a label just past the statement body.
                 if (isIIFE) {
                     currentReturnTarget = createBranchLabel();
                 }
                 else {
                     currentFlow = { flags: FlowFlags.Start };
-                    if (kind === SyntaxKind.FunctionExpression || kind === SyntaxKind.ArrowFunction) {
+                    if (containerFlags & ContainerFlags.IsFunctionExpression) {
                         (<FlowStart>currentFlow).container = <FunctionExpression | ArrowFunction>node;
                     }
                     currentReturnTarget = undefined;
@@ -487,46 +454,17 @@ namespace ts {
                 currentContinueTarget = undefined;
                 activeLabels = undefined;
                 hasExplicitReturn = false;
-            }
-
-            if (node.flags & NodeFlags.JavaScriptFile && node.jsDocComment) {
-                bind(node.jsDocComment);
-            }
-
-            bindReachableStatement(node);
-
-            if (!(currentFlow.flags & FlowFlags.Unreachable) && isFunctionLikeKind(kind) && nodeIsPresent((<FunctionLikeDeclaration>node).body)) {
-                flags |= NodeFlags.HasImplicitReturn;
-                if (hasExplicitReturn) {
-                    flags |= NodeFlags.HasExplicitReturn;
+                bindChildren(node);
+                // Reset all reachability check related flags on node (for incremental scenarios)
+                // Reset all emit helper flags on node (for incremental scenarios)
+                node.flags &= ~NodeFlags.ReachabilityAndEmitFlags;
+                if (!(currentFlow.flags & FlowFlags.Unreachable) && containerFlags & ContainerFlags.IsFunctionLike && nodeIsPresent((<FunctionLikeDeclaration>node).body)) {
+                    node.flags |= NodeFlags.HasImplicitReturn;
+                    if (hasExplicitReturn) node.flags |= NodeFlags.HasExplicitReturn;
                 }
-            }
-
-            if (kind === SyntaxKind.InterfaceDeclaration) {
-                flags = seenThisKeyword ? flags | NodeFlags.ContainsThis : flags & ~NodeFlags.ContainsThis;
-            }
-
-            if (kind === SyntaxKind.SourceFile) {
-                if (hasClassExtends) {
-                    flags |= NodeFlags.HasClassExtends;
+                if (node.kind === SyntaxKind.SourceFile) {
+                    node.flags |= emitFlags;
                 }
-                if (hasDecorators) {
-                    flags |= NodeFlags.HasDecorators;
-                }
-                if (hasParameterDecorators) {
-                    flags |= NodeFlags.HasParamDecorators;
-                }
-                if (hasAsyncFunctions) {
-                    flags |= NodeFlags.HasAsyncFunctions;
-                }
-                if (hasJsxSpreadAttribute) {
-                    flags |= NodeFlags.HasJsxSpreadAttribute;
-                }
-            }
-
-            node.flags = flags;
-
-            if (saveState) {
                 if (isIIFE) {
                     addAntecedent(currentReturnTarget, currentFlow);
                     currentFlow = finishFlowLabel(currentReturnTarget);
@@ -540,22 +478,26 @@ namespace ts {
                 activeLabels = saveActiveLabels;
                 hasExplicitReturn = saveHasExplicitReturn;
             }
-
+            else if (containerFlags & ContainerFlags.IsInterface) {
+                seenThisKeyword = false;
+                bindChildren(node);
+                node.flags = seenThisKeyword ? node.flags | NodeFlags.ContainsThis : node.flags & ~NodeFlags.ContainsThis;
+            }
+            else {
+                bindChildren(node);
+            }
             container = saveContainer;
-            parent = saveParent;
             blockScopeContainer = savedBlockScopeContainer;
         }
 
-        /**
-         * Returns true if node and its subnodes were successfully traversed.
-         * Returning false means that node was not examined and caller needs to dive into the node himself.
-         */
-        function bindReachableStatement(node: Node): void {
+        function bindChildren(node: Node): void {
+            if (node.flags & NodeFlags.JavaScriptFile && node.jsDocComment) {
+                bind(node.jsDocComment);
+            }
             if (checkUnreachable(node)) {
                 forEachChild(node, bind);
                 return;
             }
-
             switch (node.kind) {
                 case SyntaxKind.WhileStatement:
                     bindWhileStatement(<WhileStatement>node);
@@ -1145,31 +1087,42 @@ namespace ts {
             switch (node.kind) {
                 case SyntaxKind.ClassExpression:
                 case SyntaxKind.ClassDeclaration:
-                case SyntaxKind.InterfaceDeclaration:
                 case SyntaxKind.EnumDeclaration:
                 case SyntaxKind.ObjectLiteralExpression:
                 case SyntaxKind.TypeLiteral:
                 case SyntaxKind.JSDocRecordType:
                     return ContainerFlags.IsContainer;
 
+                case SyntaxKind.InterfaceDeclaration:
+                    return ContainerFlags.IsContainer | ContainerFlags.IsInterface;
+
+                case SyntaxKind.JSDocFunctionType:
+                case SyntaxKind.ModuleDeclaration:
+                case SyntaxKind.TypeAliasDeclaration:
+                    return ContainerFlags.IsContainer | ContainerFlags.HasLocals;
+
+                case SyntaxKind.SourceFile:
+                    return ContainerFlags.IsContainer | ContainerFlags.IsControlFlowContainer | ContainerFlags.HasLocals;
+
+                case SyntaxKind.Constructor:
+                case SyntaxKind.FunctionDeclaration:
+                case SyntaxKind.MethodDeclaration:
+                case SyntaxKind.MethodSignature:
+                case SyntaxKind.GetAccessor:
+                case SyntaxKind.SetAccessor:
                 case SyntaxKind.CallSignature:
                 case SyntaxKind.ConstructSignature:
                 case SyntaxKind.IndexSignature:
-                case SyntaxKind.MethodDeclaration:
-                case SyntaxKind.MethodSignature:
-                case SyntaxKind.FunctionDeclaration:
-                case SyntaxKind.Constructor:
-                case SyntaxKind.GetAccessor:
-                case SyntaxKind.SetAccessor:
                 case SyntaxKind.FunctionType:
-                case SyntaxKind.JSDocFunctionType:
                 case SyntaxKind.ConstructorType:
+                    return ContainerFlags.IsContainer | ContainerFlags.IsControlFlowContainer | ContainerFlags.HasLocals | ContainerFlags.IsFunctionLike;
+
                 case SyntaxKind.FunctionExpression:
                 case SyntaxKind.ArrowFunction:
-                case SyntaxKind.ModuleDeclaration:
-                case SyntaxKind.SourceFile:
-                case SyntaxKind.TypeAliasDeclaration:
-                    return ContainerFlags.IsContainerWithLocals;
+                    return ContainerFlags.IsContainer | ContainerFlags.IsControlFlowContainer | ContainerFlags.HasLocals | ContainerFlags.IsFunctionLike | ContainerFlags.IsFunctionExpression;
+
+                case SyntaxKind.ModuleBlock:
+                    return ContainerFlags.IsControlFlowContainer;
 
                 case SyntaxKind.CatchClause:
                 case SyntaxKind.ForStatement:
@@ -1606,8 +1559,8 @@ namespace ts {
 
             node.parent = parent;
 
-            const savedInStrictMode = inStrictMode;
-            if (!savedInStrictMode) {
+            const saveInStrictMode = inStrictMode;
+            if (!saveInStrictMode) {
                 updateStrictMode(node);
             }
 
@@ -1627,9 +1580,18 @@ namespace ts {
             // symbols we do specialized work when we recurse.  For example, we'll keep track of
             // the current 'container' node when it changes.  This helps us know which symbol table
             // a local should go into for example.
-            bindChildren(node);
+            const saveParent = parent;
+            parent = node;
+            const containerFlags = getContainerFlags(node);
+            if (containerFlags === ContainerFlags.None) {
+                bindChildren(node);
+            }
+            else {
+                bindContainer(node, containerFlags);
+            }
+            parent = saveParent;
 
-            inStrictMode = savedInStrictMode;
+            inStrictMode = saveInStrictMode;
         }
 
         function updateStrictMode(node: Node) {
@@ -1746,7 +1708,7 @@ namespace ts {
                     return bindPropertyOrMethodOrAccessor(<Declaration>node, SymbolFlags.EnumMember, SymbolFlags.EnumMemberExcludes);
 
                 case SyntaxKind.JsxSpreadAttribute:
-                    hasJsxSpreadAttribute = true;
+                    emitFlags |= NodeFlags.HasJsxSpreadAttribute;
                     return;
 
                 case SyntaxKind.CallSignature:
@@ -1970,10 +1932,10 @@ namespace ts {
         function bindClassLikeDeclaration(node: ClassLikeDeclaration) {
             if (!isDeclarationFile(file) && !isInAmbientContext(node)) {
                 if (getClassExtendsHeritageClauseElement(node) !== undefined) {
-                    hasClassExtends = true;
+                    emitFlags |= NodeFlags.HasClassExtends;
                 }
                 if (nodeIsDecorated(node)) {
-                    hasDecorators = true;
+                    emitFlags |= NodeFlags.HasDecorators;
                 }
             }
 
@@ -2049,8 +2011,7 @@ namespace ts {
             if (!isDeclarationFile(file) &&
                 !isInAmbientContext(node) &&
                 nodeIsDecorated(node)) {
-                hasDecorators = true;
-                hasParameterDecorators = true;
+                emitFlags |= (NodeFlags.HasDecorators | NodeFlags.HasParamDecorators);
             }
 
             if (inStrictMode) {
@@ -2077,7 +2038,7 @@ namespace ts {
         function bindFunctionDeclaration(node: FunctionDeclaration) {
             if (!isDeclarationFile(file) && !isInAmbientContext(node)) {
                 if (isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
+                    emitFlags |= NodeFlags.HasAsyncFunctions;
                 }
             }
 
@@ -2094,7 +2055,7 @@ namespace ts {
         function bindFunctionExpression(node: FunctionExpression) {
             if (!isDeclarationFile(file) && !isInAmbientContext(node)) {
                 if (isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
+                    emitFlags |= NodeFlags.HasAsyncFunctions;
                 }
             }
             if (currentFlow) {
@@ -2108,10 +2069,10 @@ namespace ts {
         function bindPropertyOrMethodOrAccessor(node: Declaration, symbolFlags: SymbolFlags, symbolExcludes: SymbolFlags) {
             if (!isDeclarationFile(file) && !isInAmbientContext(node)) {
                 if (isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
+                    emitFlags |= NodeFlags.HasAsyncFunctions;
                 }
                 if (nodeIsDecorated(node)) {
-                    hasDecorators = true;
+                    emitFlags |= NodeFlags.HasDecorators;
                 }
             }
 

From 5b4dffc2d72f9c1b99fdf6fa3d2f090fc735066c Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sun, 29 May 2016 16:04:34 -0700
Subject: [PATCH 129/332] More critical path optimization in binder

---
 src/compiler/binder.ts | 86 ++++++++++++++++++------------------------
 1 file changed, 37 insertions(+), 49 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 4f24458f08d..af304e5f0a2 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -1556,15 +1556,9 @@ namespace ts {
             if (!node) {
                 return;
             }
-
             node.parent = parent;
-
             const saveInStrictMode = inStrictMode;
-            if (!saveInStrictMode) {
-                updateStrictMode(node);
-            }
-
-            // First we bind declaration nodes to a symbol if possible.  We'll both create a symbol
+            // First we bind declaration nodes to a symbol if possible. We'll both create a symbol
             // and then potentially add the symbol to an appropriate symbol table. Possible
             // destination symbol tables are:
             //
@@ -1572,56 +1566,40 @@ namespace ts {
             //  2) The 'members' table of the current container's symbol.
             //  3) The 'locals' table of the current container.
             //
-            // However, not all symbols will end up in any of these tables.  'Anonymous' symbols
+            // However, not all symbols will end up in any of these tables. 'Anonymous' symbols
             // (like TypeLiterals for example) will not be put in any table.
             bindWorker(node);
-
-            // Then we recurse into the children of the node to bind them as well.  For certain
-            // symbols we do specialized work when we recurse.  For example, we'll keep track of
-            // the current 'container' node when it changes.  This helps us know which symbol table
-            // a local should go into for example.
-            const saveParent = parent;
-            parent = node;
-            const containerFlags = getContainerFlags(node);
-            if (containerFlags === ContainerFlags.None) {
-                bindChildren(node);
+            // Then we recurse into the children of the node to bind them as well. For certain
+            // symbols we do specialized work when we recurse. For example, we'll keep track of
+            // the current 'container' node when it changes. This helps us know which symbol table
+            // a local should go into for example. Since terminal nodes are known not to have
+            // children, as an optimization we don't process those.
+            if (node.kind > SyntaxKind.LastToken) {
+                const saveParent = parent;
+                parent = node;
+                const containerFlags = getContainerFlags(node);
+                if (containerFlags === ContainerFlags.None) {
+                    bindChildren(node);
+                }
+                else {
+                    bindContainer(node, containerFlags);
+                }
+                parent = saveParent;
             }
-            else {
-                bindContainer(node, containerFlags);
-            }
-            parent = saveParent;
-
             inStrictMode = saveInStrictMode;
         }
 
-        function updateStrictMode(node: Node) {
-            switch (node.kind) {
-                case SyntaxKind.SourceFile:
-                case SyntaxKind.ModuleBlock:
-                    updateStrictModeStatementList((<SourceFile | ModuleBlock>node).statements);
-                    return;
-                case SyntaxKind.Block:
-                    if (isFunctionLike(node.parent)) {
-                        updateStrictModeStatementList((<Block>node).statements);
-                    }
-                    return;
-                case SyntaxKind.ClassDeclaration:
-                case SyntaxKind.ClassExpression:
-                    // All classes are automatically in strict mode in ES6.
-                    inStrictMode = true;
-                    return;
-            }
-        }
-
         function updateStrictModeStatementList(statements: NodeArray<Statement>) {
-            for (const statement of statements) {
-                if (!isPrologueDirective(statement)) {
-                    return;
-                }
+            if (!inStrictMode) {
+                for (const statement of statements) {
+                    if (!isPrologueDirective(statement)) {
+                        return;
+                    }
 
-                if (isUseStrictPrologueDirective(<ExpressionStatement>statement)) {
-                    inStrictMode = true;
-                    return;
+                    if (isUseStrictPrologueDirective(<ExpressionStatement>statement)) {
+                        inStrictMode = true;
+                        return;
+                    }
                 }
             }
         }
@@ -1753,6 +1731,8 @@ namespace ts {
                 // Members of classes, interfaces, and modules
                 case SyntaxKind.ClassExpression:
                 case SyntaxKind.ClassDeclaration:
+                    // All classes are automatically in strict mode in ES6.
+                    inStrictMode = true;
                     return bindClassLikeDeclaration(<ClassLikeDeclaration>node);
                 case SyntaxKind.InterfaceDeclaration:
                     return bindBlockScopedDeclaration(<Declaration>node, SymbolFlags.Interface, SymbolFlags.InterfaceExcludes);
@@ -1778,7 +1758,15 @@ namespace ts {
                 case SyntaxKind.ExportAssignment:
                     return bindExportAssignment(<ExportAssignment>node);
                 case SyntaxKind.SourceFile:
+                    updateStrictModeStatementList((<SourceFile>node).statements);
                     return bindSourceFileIfExternalModule();
+                case SyntaxKind.Block:
+                    if (!isFunctionLike(node.parent)) {
+                        return;
+                    }
+                    // Fall through
+                case SyntaxKind.ModuleBlock:
+                    return updateStrictModeStatementList((<Block | ModuleBlock>node).statements);
             }
         }
 

From 18ee4b0a1ee1e326b5bbcdc0104466ac9c3d13d2 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Mon, 30 May 2016 22:11:43 -0700
Subject: [PATCH 130/332] cr feedback

---
 src/compiler/binder.ts        | 12 ++++++++++++
 src/compiler/checker.ts       | 16 +++++++++++++---
 src/compiler/parser.ts        | 29 ++++++-----------------------
 src/compiler/types.ts         |  8 +++++---
 src/services/navigationBar.ts |  6 ++++++
 src/services/services.ts      | 11 +----------
 6 files changed, 43 insertions(+), 39 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 756be48ed94..3d3a86f20fd 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -267,6 +267,18 @@ namespace ts {
                     let functionType = <JSDocFunctionType>node.parent;
                     let index = indexOf(functionType.parameters, node);
                     return "p" + index;
+                case SyntaxKind.JSDocTypedefTag:
+                    const parentNode = node.parent && node.parent.parent;
+                    let nameFromParentNode: string;
+                    if (parentNode && parentNode.kind === SyntaxKind.VariableStatement) {
+                        if ((<VariableStatement>parentNode).declarationList.declarations.length > 0) {
+                            const nameIdentifier = (<VariableStatement>parentNode).declarationList.declarations[0].name;
+                            if (nameIdentifier.kind === SyntaxKind.Identifier) {
+                                nameFromParentNode = (<Identifier>nameIdentifier).text;
+                            }
+                        }
+                    }
+                    return nameFromParentNode;
             }
         }
 
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 42af34c0659..e8b23822593 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -3586,11 +3586,21 @@ namespace ts {
                     return unknownType;
                 }
 
+                let type: Type;
                 let declaration: JSDocTypedefTag | TypeAliasDeclaration = <JSDocTypedefTag>getDeclarationOfKind(symbol, SyntaxKind.JSDocTypedefTag);
-                if (!declaration) {
-                    declaration = <TypeAliasDeclaration>getDeclarationOfKind(symbol, SyntaxKind.TypeAliasDeclaration);
+                if (declaration) {
+                    if (declaration.jsDocTypeLiteral) {
+                        type = getTypeFromTypeNode(declaration.jsDocTypeLiteral);
+                    }
+                    else {
+                        type = getTypeFromTypeNode(declaration.typeExpression.type);
+                    }
                 }
-                let type = getTypeFromTypeNode(declaration.type);
+                else {
+                    declaration = <TypeAliasDeclaration>getDeclarationOfKind(symbol, SyntaxKind.TypeAliasDeclaration);
+                    type = getTypeFromTypeNode(declaration.type);
+                }
+
                 if (popTypeResolution()) {
                     links.typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
                     if (links.typeParameters) {
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 07509d0afcc..c61b4b836ea 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -404,7 +404,7 @@ namespace ts {
             case SyntaxKind.JSDocTypedefTag:
                 return visitNode(cbNode, (<JSDocTypedefTag>node).typeExpression) ||
                     visitNode(cbNode, (<JSDocTypedefTag>node).name) ||
-                    visitNode(cbNode, (<JSDocTypedefTag>node).type);
+                    visitNode(cbNode, (<JSDocTypedefTag>node).jsDocTypeLiteral);
             case SyntaxKind.JSDocTypeLiteral:
                 return visitNodes(cbNodes, (<JSDocTypeLiteral>node).jsDocPropertyTags);
             case SyntaxKind.JSDocPropertyTag:
@@ -6301,28 +6301,11 @@ namespace ts {
                 function handleTypedefTag(atToken: Node, tagName: Identifier): JSDocTypedefTag {
                     const typeExpression = tryParseTypeExpression();
                     skipWhitespace();
-                    let name = parseJSDocIdentifierName();
-                    if (!name) {
-                        let foundNameFromParentNode = false;
-                        if (parentNode && parentNode.kind === SyntaxKind.VariableStatement) {
-                            if ((<VariableStatement>parentNode).declarationList.declarations.length > 0) {
-                                const nameFromParentNode = (<VariableStatement>parentNode).declarationList.declarations[0].name;
-                                if (nameFromParentNode.kind === SyntaxKind.Identifier) {
-                                    foundNameFromParentNode = true;
-                                    name = <Identifier>nameFromParentNode;
-                                }
-                            }
-                        }
-                        if (!foundNameFromParentNode) {
-                            parseErrorAtPosition(scanner.getStartPos(), 0, Diagnostics.Identifier_expected);
-                            return undefined;
-                        }
-                    }
 
                     const typedefTag = <JSDocTypedefTag>createNode(SyntaxKind.JSDocTypedefTag, atToken.pos);
                     typedefTag.atToken = atToken;
                     typedefTag.tagName = tagName;
-                    typedefTag.name = name;
+                    typedefTag.name = parseJSDocIdentifierName();
                     typedefTag.typeExpression = typeExpression;
 
                     if (typeExpression) {
@@ -6331,16 +6314,16 @@ namespace ts {
                             if (jsDocTypeReference.name.kind === SyntaxKind.Identifier) {
                                 const name = <Identifier>jsDocTypeReference.name;
                                 if (name.text === "Object") {
-                                    typedefTag.type = scanChildTags();
+                                    typedefTag.jsDocTypeLiteral = scanChildTags();
                                 }
                             }
                         }
-                        if (!typedefTag.type) {
-                            typedefTag.type = typeExpression.type;
+                        if (!typedefTag.jsDocTypeLiteral) {
+                            typedefTag.jsDocTypeLiteral = typeExpression.type;
                         }
                     }
                     else {
-                        typedefTag.type = scanChildTags();
+                        typedefTag.jsDocTypeLiteral = scanChildTags();
                     }
 
                     return finishNode(typedefTag);
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 1b9af02a8d5..f23b52b35d7 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -376,7 +376,9 @@ namespace ts {
         LastBinaryOperator = CaretEqualsToken,
         FirstNode = QualifiedName,
         FirstJSDocNode = JSDocTypeExpression,
-        LastJSDocNode = JSDocTypeLiteral
+        LastJSDocNode = JSDocTypeLiteral,
+        FirstJSDocTagNode = JSDocComment,
+        LastJSDocTagNode = JSDocTypeLiteral
     }
 
     export const enum NodeFlags {
@@ -1518,9 +1520,9 @@ namespace ts {
 
     // @kind(SyntaxKind.JSDocTypedefTag)
     export interface JSDocTypedefTag extends JSDocTag, Declaration {
-        name: Identifier;
+        name?: Identifier;
         typeExpression?: JSDocTypeExpression;
-        type: JSDocType;
+        jsDocTypeLiteral?: JSDocTypeLiteral;
     }
 
     // @kind(SyntaxKind.JSDocPropertyTag)
diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index 0cb431de668..5515356a259 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -653,6 +653,12 @@ namespace ts.NavigationBar {
                 topItem.childItems.push(newItem);
             }
 
+            if (node.jsDocComments && node.jsDocComments.length > 0) {
+                for (const jsDocComment of node.jsDocComments) {
+                    visitNode(jsDocComment);
+                }
+            }
+
             // Add a level if traversing into a container
             if (newItem && (isFunctionLike(node) || isClassLike(node))) {
                 const lastTop = topItem;
diff --git a/src/services/services.ts b/src/services/services.ts
index 8fef753f2e8..90740b257c6 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -276,16 +276,7 @@ namespace ts {
                 scanner.setText((sourceFile || this.getSourceFile()).text);
                 children = [];
                 let pos = this.pos;
-                const useJSDocScanner =
-                    this.kind === SyntaxKind.JSDocComment ||
-                    this.kind === SyntaxKind.JSDocParameterTag ||
-                    this.kind === SyntaxKind.JSDocTag ||
-                    this.kind === SyntaxKind.JSDocParameterTag ||
-                    this.kind === SyntaxKind.JSDocReturnTag ||
-                    this.kind === SyntaxKind.JSDocTypeTag ||
-                    this.kind === SyntaxKind.JSDocTemplateTag ||
-                    this.kind === SyntaxKind.JSDocTypedefTag ||
-                    this.kind === SyntaxKind.JSDocPropertyTag;
+                const useJSDocScanner = this.kind >= SyntaxKind.FirstJSDocTagNode && this.kind <= SyntaxKind.LastJSDocTagNode;
                 const processNode = (node: Node) => {
                     if (pos < node.pos) {
                         pos = this.addSyntheticNodes(children, pos, node.pos, useJSDocScanner);

From 59b188d4cae7c9d0c4d39a6ec839506c1170a519 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Tue, 31 May 2016 02:05:26 -0700
Subject: [PATCH 131/332] Add navigationTo test for jsdoc typedef

---
 src/compiler/parser.ts                        |  7 ++++++
 src/harness/harness.ts                        |  5 +++-
 src/services/navigationBar.ts                 | 23 ++++++++++++++++++-
 .../server/jsdocTypedefTagNavigateTo.ts       | 16 +++++++++++++
 tests/cases/unittests/jsDocParsing.ts         |  3 ++-
 5 files changed, 51 insertions(+), 3 deletions(-)
 create mode 100644 tests/cases/fourslash/server/jsdocTypedefTagNavigateTo.ts

diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index c61b4b836ea..20f3d927e71 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -672,6 +672,13 @@ namespace ts {
                     const saveParent = parent;
                     parent = n;
                     forEachChild(n, visitNode);
+                    if (n.jsDocComments) {
+                        for (const jsDocComment of n.jsDocComments) {
+                            jsDocComment.parent = n;
+                            parent = jsDocComment;
+                            forEachChild(jsDocComment, visitNode);
+                        }
+                    }
                     parent = saveParent;
                 }
             }
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index e1c90cee80c..5fe5b84ac91 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -223,7 +223,10 @@ namespace Utils {
 
             // For some markers in SyntaxKind, we should print its original syntax name instead of
             // the marker name in tests.
-            if (k === (<any>ts).SyntaxKind.FirstJSDocNode || k === (<any>ts).SyntaxKind.LastJSDocNode) {
+            if (k === (<any>ts).SyntaxKind.FirstJSDocNode ||
+                k === (<any>ts).SyntaxKind.LastJSDocNode ||
+                k === (<any>ts).SyntaxKind.FirstJSDocTagNode ||
+                k === (<any>ts).SyntaxKind.LastJSDocTagNode) {
                 for (const kindName in (<any>ts).SyntaxKind) {
                     if ((<any>ts).SyntaxKind[kindName] === k) {
                         return kindName;
diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index 5515356a259..3adc5563d71 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -738,6 +738,27 @@ namespace ts.NavigationBar {
                     }
                     const declName = declarationNameToString(decl.name);
                     return getNavBarItem(declName, ScriptElementKind.constElement, [getNodeSpan(node)]);
+                case SyntaxKind.JSDocTypedefTag:
+                    if ((<JSDocTypedefTag>node).name) {
+                        return getNavBarItem(
+                            (<JSDocTypedefTag>node).name.text,
+                            ScriptElementKind.typeElement,
+                            [getNodeSpan(node)]);
+                    }
+                    else {
+                        const parentNode = node.parent && node.parent.parent;
+                        if (parentNode && parentNode.kind === SyntaxKind.VariableStatement) {
+                            if ((<VariableStatement>parentNode).declarationList.declarations.length > 0) {
+                                const nameIdentifier = (<VariableStatement>parentNode).declarationList.declarations[0].name;
+                                if (nameIdentifier.kind === SyntaxKind.Identifier) {
+                                    return getNavBarItem(
+                                        (<Identifier>nameIdentifier).text,
+                                        ScriptElementKind.typeElement,
+                                        [getNodeSpan(node)]);
+                                }
+                            }
+                        }
+                    }
                 default:
                     return undefined;
             }
@@ -808,7 +829,7 @@ namespace ts.NavigationBar {
         }
 
         function getNodeSpan(node: Node) {
-            return node.kind === SyntaxKind.SourceFile
+           return node.kind === SyntaxKind.SourceFile
                 ? createTextSpanFromBounds(node.getFullStart(), node.getEnd())
                 : createTextSpanFromBounds(node.getStart(), node.getEnd());
         }
diff --git a/tests/cases/fourslash/server/jsdocTypedefTagNavigateTo.ts b/tests/cases/fourslash/server/jsdocTypedefTagNavigateTo.ts
new file mode 100644
index 00000000000..1d1c1ac27ca
--- /dev/null
+++ b/tests/cases/fourslash/server/jsdocTypedefTagNavigateTo.ts
@@ -0,0 +1,16 @@
+/// <reference path="../fourslash.ts"/>
+
+// @allowNonTsExtensions: true
+// @Filename: jsDocTypedef_form2.js
+////
+//// /** @typedef {(string | number)} NumberLike */
+//// /** @typedef {(string | number | string[])} */
+//// var NumberLike2;
+////
+//// /** @type {/*1*/NumberLike} */
+//// var numberLike;
+
+verify.navigationBarContains("NumberLike", "type");
+verify.navigationBarContains("NumberLike2", "type");
+verify.navigationBarContains("NumberLike2", "var");
+verify.navigationBarContains("numberLike", "var");
\ No newline at end of file
diff --git a/tests/cases/unittests/jsDocParsing.ts b/tests/cases/unittests/jsDocParsing.ts
index 8afad08909c..fb75b4d4940 100644
--- a/tests/cases/unittests/jsDocParsing.ts
+++ b/tests/cases/unittests/jsDocParsing.ts
@@ -1004,7 +1004,8 @@ namespace ts {
                 if (result !== expected) {
                     // Turn on a human-readable diff
                     if (typeof require !== "undefined") {
-                        require("chai").config.showDiff = true;
+                        const chai = require("chai");
+                        chai.config.showDiff = true;
                         chai.expect(JSON.parse(result)).equal(JSON.parse(expected));
                     }
                     else {

From fa16a99514e53e97cb2ea95269ba71964c604d03 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Tue, 31 May 2016 09:26:21 -0700
Subject: [PATCH 132/332] Allow an import of "foo.js" to be matched by a file
 "foo.ts"

---
 src/compiler/core.ts                          |  9 +++-
 src/compiler/program.ts                       | 27 ++++++++---
 src/harness/harness.ts                        | 14 +++---
 tests/baselines/reference/moduleResolution.js | 45 +++++++++++++++++++
 .../reference/moduleResolution.symbols        | 36 +++++++++++++++
 .../reference/moduleResolution.types          | 36 +++++++++++++++
 .../nameWithFileExtension.errors.txt          | 12 -----
 .../reference/nameWithFileExtension.js        |  3 ++
 .../reference/nameWithFileExtension.symbols   | 14 ++++++
 .../reference/nameWithFileExtension.types     | 17 +++++++
 .../amd/cantFindTheModule.errors.txt          |  6 +--
 .../node/cantFindTheModule.errors.txt         |  6 +--
 tests/cases/compiler/moduleResolution.ts      | 26 +++++++++++
 tests/cases/projects/NoModule/decl.ts         |  2 +-
 14 files changed, 220 insertions(+), 33 deletions(-)
 create mode 100644 tests/baselines/reference/moduleResolution.js
 create mode 100644 tests/baselines/reference/moduleResolution.symbols
 create mode 100644 tests/baselines/reference/moduleResolution.types
 delete mode 100644 tests/baselines/reference/nameWithFileExtension.errors.txt
 create mode 100644 tests/baselines/reference/nameWithFileExtension.symbols
 create mode 100644 tests/baselines/reference/nameWithFileExtension.types
 create mode 100644 tests/cases/compiler/moduleResolution.ts

diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index 79b6249539d..ba81ee7d103 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -849,13 +849,18 @@ namespace ts {
     const extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
     export function removeFileExtension(path: string): string {
         for (const ext of extensionsToRemove) {
-            if (fileExtensionIs(path, ext)) {
-                return path.substr(0, path.length - ext.length);
+            const extensionless = tryRemoveExtension(path, ext);
+            if (extensionless !== undefined) {
+                return extensionless;
             }
         }
         return path;
     }
 
+    export function tryRemoveExtension(path: string, extension: string): string {
+        return fileExtensionIs(path, extension) ? path.substring(0, path.length - extension.length) : undefined;
+    }
+
     export interface ObjectAllocator {
         getNodeConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Node;
         getSourceFileConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => SourceFile;
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index bab554927e7..f9a583da0cc 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -615,6 +615,7 @@ namespace ts {
     }
 
     /**
+     * @param extensions - Either supportedTypeScriptExtensions or if --allowJs, allSupportedExtensions
      * @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
      * in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
      */
@@ -626,13 +627,29 @@ namespace ts {
                 onlyRecordFailures = !directoryProbablyExists(directory, state.host);
             }
         }
-        return forEach(extensions, tryLoad);
 
-        function tryLoad(ext: string): string {
-            if (ext === ".tsx" && state.skipTsx) {
-                return undefined;
+        if (state.skipTsx)
+            extensions = filter(extensions, ext => ext !== "tsx");
+
+        // First try to keep/add an extension: importing "./foo.ts" can be matched by a file "./foo.ts", and "./foo" by "./foo.d.ts"
+        const keepOrAddExtension = forEach(extensions, ext =>
+           tryLoad(fileExtensionIs(candidate, ext) ? candidate : candidate + ext));
+        if (keepOrAddExtension) {
+            return keepOrAddExtension;
+        }
+
+        // Then try stripping a ".js" or ".jsx" extension and replacing it with a different one, e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
+        return forEach(supportedJavascriptExtensions, jsExt => {
+            const extensionless = tryRemoveExtension(candidate, jsExt);
+            if (extensionless !== undefined) {
+                return forEach(supportedTypeScriptExtensions, ext => {
+                    if (ext !== jsExt)
+                        return tryLoad(extensionless + ext);
+                });
             }
-            const fileName = fileExtensionIs(candidate, ext) ? candidate : candidate + ext;
+        });
+
+        function tryLoad(fileName: string): string {
             if (!onlyRecordFailures && state.host.fileExists(fileName)) {
                 if (state.traceEnabled) {
                     trace(state.host, Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index d6959c2a54f..56d66e75396 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -1,7 +1,7 @@
 
 //
 // Copyright (c) Microsoft Corporation.  All rights reserved.
-// 
+//
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
@@ -350,7 +350,7 @@ namespace Utils {
         assert.equal(node1.end, node2.end, "node1.end !== node2.end");
         assert.equal(node1.kind, node2.kind, "node1.kind !== node2.kind");
 
-        // call this on both nodes to ensure all propagated flags have been set (and thus can be 
+        // call this on both nodes to ensure all propagated flags have been set (and thus can be
         // compared).
         assert.equal(ts.containsParseError(node1), ts.containsParseError(node2));
         assert.equal(node1.flags, node2.flags, "node1.flags !== node2.flags");
@@ -751,7 +751,7 @@ namespace Harness {
         (emittedFile: string, emittedLine: number, emittedColumn: number, sourceFile: string, sourceLine: number, sourceColumn: number, sourceName: string): void;
     }
 
-    // Settings 
+    // Settings
     export let userSpecifiedRoot = "";
     export let lightMode = false;
 
@@ -790,7 +790,7 @@ namespace Harness {
             fileName: string,
             sourceText: string,
             languageVersion: ts.ScriptTarget) {
-            // We'll only assert invariants outside of light mode. 
+            // We'll only assert invariants outside of light mode.
             const shouldAssertInvariants = !Harness.lightMode;
 
             // Only set the parent nodes if we're asserting invariants.  We don't need them otherwise.
@@ -935,7 +935,7 @@ namespace Harness {
             libFiles?: string;
         }
 
-        // Additional options not already in ts.optionDeclarations 
+        // Additional options not already in ts.optionDeclarations
         const harnessOptionDeclarations: ts.CommandLineOption[] = [
             { name: "allowNonTsExtensions", type: "boolean" },
             { name: "useCaseSensitiveFileNames", type: "boolean" },
@@ -1187,7 +1187,7 @@ namespace Harness {
                 errLines.forEach(e => outputLines.push(e));
 
                 // do not count errors from lib.d.ts here, they are computed separately as numLibraryDiagnostics
-                // if lib.d.ts is explicitly included in input files and there are some errors in it (i.e. because of duplicate identifiers) 
+                // if lib.d.ts is explicitly included in input files and there are some errors in it (i.e. because of duplicate identifiers)
                 // then they will be added twice thus triggering 'total errors' assertion with condition
                 // 'totalErrorsReportedInNonLibraryFiles + numLibraryDiagnostics + numTest262HarnessDiagnostics, diagnostics.length
 
@@ -1497,7 +1497,7 @@ namespace Harness {
             };
             testUnitData.push(newTestFile2);
 
-            // unit tests always list files explicitly 
+            // unit tests always list files explicitly
             const parseConfigHost: ts.ParseConfigHost = {
                 readDirectory: (name) => []
             };
diff --git a/tests/baselines/reference/moduleResolution.js b/tests/baselines/reference/moduleResolution.js
new file mode 100644
index 00000000000..be81b926062
--- /dev/null
+++ b/tests/baselines/reference/moduleResolution.js
@@ -0,0 +1,45 @@
+//// [tests/cases/compiler/moduleResolution.ts] ////
+
+//// [a.ts]
+export default 0;
+
+// No extension: '.ts' added
+//// [b.ts]
+import a from './a';
+
+// Matching extension
+//// [c.ts]
+import a from './a.ts';
+
+// '.js' extension: stripped and replaced with '.ts'
+//// [d.ts]
+import a from './a.js';
+
+//// [jquery.d.ts]
+declare var x: number;
+export default x;
+
+// No extension: '.d.ts' added
+//// [jquery_user_1.ts]
+import j from "./jquery";
+
+// '.js' extension: stripped and replaced with '.d.ts'
+//// [jquery_user_1.ts]
+import j from "./jquery.js"
+
+
+//// [a.js]
+"use strict";
+exports.__esModule = true;
+exports["default"] = 0;
+// No extension: '.ts' added 
+//// [b.js]
+"use strict";
+// Matching extension 
+//// [c.js]
+"use strict";
+// '.js' extension: stripped and replaced with '.ts' 
+//// [d.js]
+"use strict";
+//// [jquery_user_1.js]
+"use strict";
diff --git a/tests/baselines/reference/moduleResolution.symbols b/tests/baselines/reference/moduleResolution.symbols
new file mode 100644
index 00000000000..2a51d416a4a
--- /dev/null
+++ b/tests/baselines/reference/moduleResolution.symbols
@@ -0,0 +1,36 @@
+=== tests/cases/compiler/a.ts ===
+export default 0;
+No type information for this code.
+No type information for this code.// No extension: '.ts' added
+No type information for this code.=== tests/cases/compiler/b.ts ===
+import a from './a';
+>a : Symbol(a, Decl(b.ts, 0, 6))
+
+// Matching extension
+=== tests/cases/compiler/c.ts ===
+import a from './a.ts';
+>a : Symbol(a, Decl(c.ts, 0, 6))
+
+// '.js' extension: stripped and replaced with '.ts'
+=== tests/cases/compiler/d.ts ===
+import a from './a.js';
+>a : Symbol(a, Decl(d.ts, 0, 6))
+
+=== tests/cases/compiler/jquery.d.ts ===
+declare var x: number;
+>x : Symbol(x, Decl(jquery.d.ts, 0, 11))
+
+export default x;
+>x : Symbol(x, Decl(jquery.d.ts, 0, 11))
+
+// No extension: '.d.ts' added
+=== tests/cases/compiler/jquery_user_1.ts ===
+import j from "./jquery";
+>j : Symbol(j, Decl(jquery_user_1.ts, 0, 6))
+
+// '.js' extension: stripped and replaced with '.d.ts'
+=== tests/cases/compiler/jquery_user_1.ts ===
+import j from "./jquery.js"
+>j : Symbol(j, Decl(jquery_user_1.ts, 0, 6))
+>j : Symbol(j, Decl(jquery_user_1.ts, 0, 6))
+
diff --git a/tests/baselines/reference/moduleResolution.types b/tests/baselines/reference/moduleResolution.types
new file mode 100644
index 00000000000..2e1b0f560bc
--- /dev/null
+++ b/tests/baselines/reference/moduleResolution.types
@@ -0,0 +1,36 @@
+=== tests/cases/compiler/a.ts ===
+export default 0;
+No type information for this code.
+No type information for this code.// No extension: '.ts' added
+No type information for this code.=== tests/cases/compiler/b.ts ===
+import a from './a';
+>a : number
+
+// Matching extension
+=== tests/cases/compiler/c.ts ===
+import a from './a.ts';
+>a : number
+
+// '.js' extension: stripped and replaced with '.ts'
+=== tests/cases/compiler/d.ts ===
+import a from './a.js';
+>a : number
+
+=== tests/cases/compiler/jquery.d.ts ===
+declare var x: number;
+>x : number
+
+export default x;
+>x : number
+
+// No extension: '.d.ts' added
+=== tests/cases/compiler/jquery_user_1.ts ===
+import j from "./jquery";
+>j : number
+
+// '.js' extension: stripped and replaced with '.d.ts'
+=== tests/cases/compiler/jquery_user_1.ts ===
+import j from "./jquery.js"
+>j : number
+>j : number
+
diff --git a/tests/baselines/reference/nameWithFileExtension.errors.txt b/tests/baselines/reference/nameWithFileExtension.errors.txt
deleted file mode 100644
index 2aa341271cd..00000000000
--- a/tests/baselines/reference/nameWithFileExtension.errors.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-tests/cases/conformance/externalModules/foo_1.ts(1,22): error TS2307: Cannot find module './foo_0.js'.
-
-
-==== tests/cases/conformance/externalModules/foo_1.ts (1 errors) ====
-    import foo = require('./foo_0.js');
-                         ~~~~~~~~~~~~
-!!! error TS2307: Cannot find module './foo_0.js'.
-    var x = foo.foo + 42;
-    
-==== tests/cases/conformance/externalModules/foo_0.ts (0 errors) ====
-    export var foo = 42;
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/nameWithFileExtension.js b/tests/baselines/reference/nameWithFileExtension.js
index 2d487ede245..8a7506c2d42 100644
--- a/tests/baselines/reference/nameWithFileExtension.js
+++ b/tests/baselines/reference/nameWithFileExtension.js
@@ -8,6 +8,9 @@ import foo = require('./foo_0.js');
 var x = foo.foo + 42;
 
 
+//// [foo_0.js]
+"use strict";
+exports.foo = 42;
 //// [foo_1.js]
 "use strict";
 var foo = require('./foo_0.js');
diff --git a/tests/baselines/reference/nameWithFileExtension.symbols b/tests/baselines/reference/nameWithFileExtension.symbols
new file mode 100644
index 00000000000..61e6a768ea6
--- /dev/null
+++ b/tests/baselines/reference/nameWithFileExtension.symbols
@@ -0,0 +1,14 @@
+=== tests/cases/conformance/externalModules/foo_1.ts ===
+import foo = require('./foo_0.js');
+>foo : Symbol(foo, Decl(foo_1.ts, 0, 0))
+
+var x = foo.foo + 42;
+>x : Symbol(x, Decl(foo_1.ts, 1, 3))
+>foo.foo : Symbol(foo.foo, Decl(foo_0.ts, 0, 10))
+>foo : Symbol(foo, Decl(foo_1.ts, 0, 0))
+>foo : Symbol(foo.foo, Decl(foo_0.ts, 0, 10))
+
+=== tests/cases/conformance/externalModules/foo_0.ts ===
+export var foo = 42;
+>foo : Symbol(foo, Decl(foo_0.ts, 0, 10))
+
diff --git a/tests/baselines/reference/nameWithFileExtension.types b/tests/baselines/reference/nameWithFileExtension.types
new file mode 100644
index 00000000000..a0fca3d4562
--- /dev/null
+++ b/tests/baselines/reference/nameWithFileExtension.types
@@ -0,0 +1,17 @@
+=== tests/cases/conformance/externalModules/foo_1.ts ===
+import foo = require('./foo_0.js');
+>foo : typeof foo
+
+var x = foo.foo + 42;
+>x : number
+>foo.foo + 42 : number
+>foo.foo : number
+>foo : typeof foo
+>foo : number
+>42 : number
+
+=== tests/cases/conformance/externalModules/foo_0.ts ===
+export var foo = 42;
+>foo : number
+>42 : number
+
diff --git a/tests/baselines/reference/project/cantFindTheModule/amd/cantFindTheModule.errors.txt b/tests/baselines/reference/project/cantFindTheModule/amd/cantFindTheModule.errors.txt
index 7c071fdc208..e9f8842d5cb 100644
--- a/tests/baselines/reference/project/cantFindTheModule/amd/cantFindTheModule.errors.txt
+++ b/tests/baselines/reference/project/cantFindTheModule/amd/cantFindTheModule.errors.txt
@@ -1,12 +1,12 @@
-decl.ts(1,26): error TS2307: Cannot find module './foo/bar.js'.
+decl.ts(1,26): error TS2307: Cannot find module './foo/bar.tx'.
 decl.ts(2,26): error TS2307: Cannot find module 'baz'.
 decl.ts(3,26): error TS2307: Cannot find module './baz'.
 
 
 ==== decl.ts (3 errors) ====
-    import modErr  = require("./foo/bar.js");
+    import modErr  = require("./foo/bar.tx");
                              ~~~~~~~~~~~~~~
-!!! error TS2307: Cannot find module './foo/bar.js'.
+!!! error TS2307: Cannot find module './foo/bar.tx'.
     import modErr1 = require("baz");
                              ~~~~~
 !!! error TS2307: Cannot find module 'baz'.
diff --git a/tests/baselines/reference/project/cantFindTheModule/node/cantFindTheModule.errors.txt b/tests/baselines/reference/project/cantFindTheModule/node/cantFindTheModule.errors.txt
index 7c071fdc208..e9f8842d5cb 100644
--- a/tests/baselines/reference/project/cantFindTheModule/node/cantFindTheModule.errors.txt
+++ b/tests/baselines/reference/project/cantFindTheModule/node/cantFindTheModule.errors.txt
@@ -1,12 +1,12 @@
-decl.ts(1,26): error TS2307: Cannot find module './foo/bar.js'.
+decl.ts(1,26): error TS2307: Cannot find module './foo/bar.tx'.
 decl.ts(2,26): error TS2307: Cannot find module 'baz'.
 decl.ts(3,26): error TS2307: Cannot find module './baz'.
 
 
 ==== decl.ts (3 errors) ====
-    import modErr  = require("./foo/bar.js");
+    import modErr  = require("./foo/bar.tx");
                              ~~~~~~~~~~~~~~
-!!! error TS2307: Cannot find module './foo/bar.js'.
+!!! error TS2307: Cannot find module './foo/bar.tx'.
     import modErr1 = require("baz");
                              ~~~~~
 !!! error TS2307: Cannot find module 'baz'.
diff --git a/tests/cases/compiler/moduleResolution.ts b/tests/cases/compiler/moduleResolution.ts
new file mode 100644
index 00000000000..c21614577c0
--- /dev/null
+++ b/tests/cases/compiler/moduleResolution.ts
@@ -0,0 +1,26 @@
+// @Filename: a.ts
+export default 0;
+
+// No extension: '.ts' added
+// @Filename: b.ts
+import a from './a';
+
+// Matching extension
+// @Filename: c.ts
+import a from './a.ts';
+
+// '.js' extension: stripped and replaced with '.ts'
+// @Filename: d.ts
+import a from './a.js';
+
+// @Filename: jquery.d.ts
+declare var x: number;
+export default x;
+
+// No extension: '.d.ts' added
+// @Filename: jquery_user_1.ts
+import j from "./jquery";
+
+// '.js' extension: stripped and replaced with '.d.ts'
+// @Filename: jquery_user_1.ts
+import j from "./jquery.js"
diff --git a/tests/cases/projects/NoModule/decl.ts b/tests/cases/projects/NoModule/decl.ts
index a8a29852ac2..064f777c551 100644
--- a/tests/cases/projects/NoModule/decl.ts
+++ b/tests/cases/projects/NoModule/decl.ts
@@ -1,4 +1,4 @@
-import modErr  = require("./foo/bar.js");
+import modErr  = require("./foo/bar.tx");
 import modErr1 = require("baz");
 import modErr2 = require("./baz");
 

From 0415b95fd268ffdf1f14f045dc99d5cefb3e8878 Mon Sep 17 00:00:00 2001
From: Richard Knoll <riknoll@microsoft.com>
Date: Tue, 31 May 2016 10:11:04 -0700
Subject: [PATCH 133/332] Passing regular expressions to native hosts

---
 src/compiler/commandLineParser.ts |  5 ++--
 src/compiler/core.ts              | 38 +++++++++++++++++++++++++------
 src/compiler/sys.ts               |  7 ++++--
 src/services/shims.ts             | 11 ++++++---
 4 files changed, 47 insertions(+), 14 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index d21fcd3b89d..7674dcdd063 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -1021,13 +1021,14 @@ namespace ts {
         //
         //  /a/b/*      - Watch /a/b directly to catch any new file
         //  /a/b/a?z    - Watch /a/b directly to catch any new file matching a?z
-        const excludeRegExp = getRegularExpressionForWildcard(exclude, path, "exclude", useCaseSensitiveFileNames);
+        const rawExcludeRegex = getRegularExpressionForWildcard(exclude, path, "exclude");
+        const excludeRegex = rawExcludeRegex && new RegExp(rawExcludeRegex, useCaseSensitiveFileNames ? "" : "i");
         const wildcardDirectories: Map<WatchDirectoryFlags> = {};
         if (include !== undefined) {
             const recursiveKeys: string[] = [];
             for (const file of include) {
                 const name = combinePaths(path, file);
-                if (excludeRegExp && excludeRegExp.test(name)) {
+                if (excludeRegex && excludeRegex.test(name)) {
                     continue;
                 }
 
diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index cc3c2b28114..02d01819431 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -911,7 +911,7 @@ namespace ts {
     const reservedCharacterPattern = /[^\w\s\/]/g;
     const wildcardCharCodes = [CharacterCodes.asterisk, CharacterCodes.question];
 
-    export function getRegularExpressionForWildcard(specs: string[], basePath: string, usage: "files" | "directories" | "exclude", useCaseSensitiveFileNames: boolean) {
+    export function getRegularExpressionForWildcard(specs: string[], basePath: string, usage: "files" | "directories" | "exclude") {
         if (specs === undefined || specs.length === 0) {
             return undefined;
         }
@@ -978,7 +978,7 @@ namespace ts {
             return undefined;
         }
 
-        return new RegExp("^(" + pattern + (usage === "exclude" ? ")($|/)" : ")$"), useCaseSensitiveFileNames ? "" : "i");
+        return "^(" + pattern + (usage === "exclude" ? ")($|/)" : ")$");
     }
 
     function replaceWildcardCharacter(match: string) {
@@ -990,15 +990,39 @@ namespace ts {
         directories: string[];
     }
 
-    export function matchFiles(path: string, extensions: string[], excludes: string[], includes: string[], useCaseSensitiveFileNames: boolean, currentDirectory: string, getFileSystemEntries: (path: string) => FileSystemEntries): string[] {
+    interface FileMatcherPatterns {
+        includeFilePattern: string;
+        includeDirectoryPattern: string;
+        excludePattern: string;
+        basePaths: string[];
+    }
+
+    export function getFileMatcherPatterns(path: string, extensions: string[], excludes: string[], includes: string[], useCaseSensitiveFileNames: boolean, currentDirectory: string): FileMatcherPatterns {
         path = normalizePath(path);
         currentDirectory = normalizePath(currentDirectory);
         const absolutePath = combinePaths(currentDirectory, path);
-        const includeFileRegex = getRegularExpressionForWildcard(includes, absolutePath, "files", useCaseSensitiveFileNames);
-        const includeDirectoryRegex = getRegularExpressionForWildcard(includes, absolutePath, "directories", useCaseSensitiveFileNames);
-        const excludeRegex = getRegularExpressionForWildcard(excludes, absolutePath, "exclude", useCaseSensitiveFileNames);
+
+        return {
+            includeFilePattern: getRegularExpressionForWildcard(includes, absolutePath, "files"),
+            includeDirectoryPattern: getRegularExpressionForWildcard(includes, absolutePath, "directories"),
+            excludePattern: getRegularExpressionForWildcard(excludes, absolutePath, "exclude"),
+            basePaths: getBasePaths(path, includes, useCaseSensitiveFileNames)
+        };
+    }
+
+    export function matchFiles(path: string, extensions: string[], excludes: string[], includes: string[], useCaseSensitiveFileNames: boolean, currentDirectory: string, getFileSystemEntries: (path: string) => FileSystemEntries): string[] {
+        path = normalizePath(path);
+        currentDirectory = normalizePath(currentDirectory);
+
+        const patterns = getFileMatcherPatterns(path, extensions, excludes, includes, useCaseSensitiveFileNames, currentDirectory);
+
+        const regexFlag = useCaseSensitiveFileNames ? "" : "i";
+        const includeFileRegex = patterns.includeFilePattern && new RegExp(patterns.includeFilePattern, regexFlag);
+        const includeDirectoryRegex = patterns.includeDirectoryPattern && new RegExp(patterns.includeDirectoryPattern, regexFlag);
+        const excludeRegex = patterns.excludePattern && new RegExp(patterns.excludePattern, regexFlag);
+
         const result: string[] = [];
-        for (const basePath of getBasePaths(path, includes, useCaseSensitiveFileNames)) {
+        for (const basePath of patterns.basePaths) {
             visitDirectory(basePath, combinePaths(currentDirectory, basePath));
         }
         return result;
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index de7d24b2296..21a78ee1dbe 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -73,7 +73,7 @@ namespace ts {
         readFile(path: string): string;
         writeFile(path: string, contents: string): void;
         getDirectories(path: string): string[];
-        readDirectory(path: string, extensions?: string[], exclude?: string[], include?: string[]): string[];
+        readDirectory(path: string, extensions?: string[], basePaths?: string[], excludeEx?: string, includeFileEx?: string, includeDirEx?: string): string[];
         watchFile?(path: string, callback: FileWatcherCallback): FileWatcher;
         watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
         realpath(path: string): string;
@@ -558,7 +558,10 @@ namespace ts {
                 getExecutingFilePath: () => ChakraHost.executingFile,
                 getCurrentDirectory: () => ChakraHost.currentDirectory,
                 getDirectories: ChakraHost.getDirectories,
-                readDirectory: ChakraHost.readDirectory,
+                readDirectory: (path: string, extensions?: string[], excludes?: string[], includes?: string[]) => {
+                    const pattern = getFileMatcherPatterns(path, extensions, excludes, includes, !!ChakraHost.useCaseSensitiveFileNames, ChakraHost.currentDirectory);
+                    return ChakraHost.readDirectory(path, extensions, pattern.basePaths, pattern.excludePattern, pattern.includeFilePattern, pattern.includeDirectoryPattern);
+                },
                 exit: ChakraHost.quit,
                 realpath
             };
diff --git a/src/services/shims.ts b/src/services/shims.ts
index 032a2712fdb..75448536bad 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -80,8 +80,9 @@ namespace ts {
          * @param exclude A JSON encoded string[] containing the paths to exclude
          *  when enumerating the directory.
          */
-        readDirectory(rootDir: string, extension: string, exclude?: string, include?: string, depth?: number): string;
+        readDirectory(rootDir: string, extension: string, basePaths?: string, excludeEx?: string, includeFileEx?: string, includeDirEx?: string, depth?: number): string;
         useCaseSensitiveFileNames?(): boolean;
+        getCurrentDirectory(): string;
         trace(s: string): void;
     }
 
@@ -453,11 +454,15 @@ namespace ts {
             // Wrap the API changes for 2.0 release. This try/catch
             // should be removed once TypeScript 2.0 has shipped.
             try {
+                const pattern = getFileMatcherPatterns(rootDir, extensions, exclude, include,
+                    this.shimHost.useCaseSensitiveFileNames(), this.shimHost.getCurrentDirectory());
                 return JSON.parse(this.shimHost.readDirectory(
                     rootDir,
                     JSON.stringify(extensions),
-                    JSON.stringify(exclude),
-                    JSON.stringify(include),
+                    JSON.stringify(pattern.basePaths),
+                    pattern.excludePattern,
+                    pattern.includeFilePattern,
+                    pattern.includeDirectoryPattern,
                     depth
                 ));
             }

From e4ca76898f6ae52496c6c84ddb24c9199c77b702 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 31 May 2016 10:17:45 -0700
Subject: [PATCH 134/332] Remove redundant parameter to `writeTestConfigFile`

It allowed a new parameter to silently succeed, causing runtests-browser
to run zero files.
---
 Jakefile.js | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/Jakefile.js b/Jakefile.js
index 474303a9722..2f0ce4aa399 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -680,7 +680,7 @@ function cleanTestDirs() {
 }
 
 // used to pass data from jake command line directly to run.js
-function writeTestConfigFile(tests, light, taskConfigsFolder, workerCount, testConfigFile) {
+function writeTestConfigFile(tests, light, taskConfigsFolder, workerCount) {
     var testConfigContents = JSON.stringify({ test: tests ? [tests] : undefined, light: light, workerCount: workerCount, taskConfigsFolder: taskConfigsFolder });
     console.log('Running tests with config: ' + testConfigContents);
     fs.writeFileSync('test.config', testConfigContents);
@@ -716,7 +716,7 @@ function runConsoleTests(defaultReporter, runInParallel) {
     }
 
     if (tests || light || taskConfigsFolder) {
-        writeTestConfigFile(tests, light, taskConfigsFolder, workerCount, testConfigFile);
+        writeTestConfigFile(tests, light, taskConfigsFolder, workerCount);
     }
 
     if (tests && tests.toLocaleLowerCase() === "rwc") {
@@ -850,7 +850,7 @@ task("runtests-browser", ["tests", "browserify", builtLocalDirectory, servicesFi
         fs.unlinkSync(testConfigFile);
     }
     if(tests || light) {
-        writeTestConfigFile(tests, light, testConfigFile);
+        writeTestConfigFile(tests, light);
     }
 
     tests = tests ? tests : '';

From a0546a9310aa18a097fa8edb5276dc0c16fedfc2 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Tue, 31 May 2016 10:39:29 -0700
Subject: [PATCH 135/332] Improve loadModuleFromFile code

---
 src/compiler/program.ts | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index f9a583da0cc..720b99d8900 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -628,24 +628,25 @@ namespace ts {
             }
         }
 
-        if (state.skipTsx)
-            extensions = filter(extensions, ext => ext !== "tsx");
-
         // First try to keep/add an extension: importing "./foo.ts" can be matched by a file "./foo.ts", and "./foo" by "./foo.d.ts"
-        const keepOrAddExtension = forEach(extensions, ext =>
-           tryLoad(fileExtensionIs(candidate, ext) ? candidate : candidate + ext));
+        const keepOrAddExtension = forEach(extensions, ext => {
+            if (state.skipTsx && (ext === ".jsx" || ext === ".tsx")) {
+                return;
+            }
+            return tryLoad(fileExtensionIs(candidate, ext) ? candidate : candidate + ext);
+        });
         if (keepOrAddExtension) {
             return keepOrAddExtension;
         }
 
-        // Then try stripping a ".js" or ".jsx" extension and replacing it with a different one, e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
+        // Then try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one, e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
         return forEach(supportedJavascriptExtensions, jsExt => {
+            if (state.skipTsx && jsExt === ".jsx") {
+                return;
+            }
             const extensionless = tryRemoveExtension(candidate, jsExt);
             if (extensionless !== undefined) {
-                return forEach(supportedTypeScriptExtensions, ext => {
-                    if (ext !== jsExt)
-                        return tryLoad(extensionless + ext);
-                });
+                return forEach(supportedTypeScriptExtensions, tsExt => tryLoad(extensionless + tsExt));
             }
         });
 

From e93f9df95506a8cf3daa99b18a05331960c9f726 Mon Sep 17 00:00:00 2001
From: Zhengbo Li <zhengbli@microsoft.com>
Date: Tue, 31 May 2016 10:48:25 -0700
Subject: [PATCH 136/332] Fix broken test

---
 .../server/jsdocTypedefTagNavigateTo.ts       | 22 +++++++++++++++----
 1 file changed, 18 insertions(+), 4 deletions(-)

diff --git a/tests/cases/fourslash/server/jsdocTypedefTagNavigateTo.ts b/tests/cases/fourslash/server/jsdocTypedefTagNavigateTo.ts
index 1d1c1ac27ca..77cd75aa44c 100644
--- a/tests/cases/fourslash/server/jsdocTypedefTagNavigateTo.ts
+++ b/tests/cases/fourslash/server/jsdocTypedefTagNavigateTo.ts
@@ -10,7 +10,21 @@
 //// /** @type {/*1*/NumberLike} */
 //// var numberLike;
 
-verify.navigationBarContains("NumberLike", "type");
-verify.navigationBarContains("NumberLike2", "type");
-verify.navigationBarContains("NumberLike2", "var");
-verify.navigationBarContains("numberLike", "var");
\ No newline at end of file
+verify.navigationBar([
+  {
+    "text": "NumberLike",
+    "kind": "type"
+  },
+  {
+    "text": "NumberLike2",
+    "kind": "type"
+  },
+  {
+    "text": "NumberLike2",
+    "kind": "var"
+  },
+  {
+    "text": "numberLike",
+    "kind": "var"
+  }
+]);
\ No newline at end of file

From 35b8b42b554d2b98230320b727b452d0abe9aaae Mon Sep 17 00:00:00 2001
From: Yui <yuit@users.noreply.github.com>
Date: Tue, 31 May 2016 11:16:56 -0700
Subject: [PATCH 137/332] Only check if the extensions match (#8870)

---
 src/harness/loggedIO.ts | 8 +-------
 1 file changed, 1 insertion(+), 7 deletions(-)

diff --git a/src/harness/loggedIO.ts b/src/harness/loggedIO.ts
index 1c399b30a1d..3535decf121 100644
--- a/src/harness/loggedIO.ts
+++ b/src/harness/loggedIO.ts
@@ -226,13 +226,7 @@ namespace Playback {
             (path, extension, exclude) => findResultByPath(wrapper,
                     replayLog.directoriesRead.filter(
                         d => {
-                            if (d.extension === extension) {
-                                if (d.exclude) {
-                                    return ts.arrayIsEqualTo(d.exclude, exclude);
-                                }
-                                return true;
-                            }
-                            return false;
+                            return d.extension === extension;
                         }
                     ), path));
 

From f4d6b67cb0973ed3366190e10f61c0cf3a4e4229 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Tue, 31 May 2016 11:39:11 -0700
Subject: [PATCH 138/332] Respond to PR comments

---
 src/compiler/core.ts                          |  7 ++++
 src/compiler/diagnosticMessages.json          |  4 +++
 src/compiler/program.ts                       | 34 +++++++++----------
 .../reference/moduleResolution.trace.json     | 32 +++++++++++++++++
 tests/cases/compiler/moduleResolution.ts      |  1 +
 5 files changed, 61 insertions(+), 17 deletions(-)
 create mode 100644 tests/baselines/reference/moduleResolution.trace.json

diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index ba81ee7d103..932acdc6324 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -861,6 +861,13 @@ namespace ts {
         return fileExtensionIs(path, extension) ? path.substring(0, path.length - extension.length) : undefined;
     }
 
+    export function getFileExtension(path: string): string {
+        const dot = path.lastIndexOf(".");
+        if (dot !== -1) {
+            return path.substring(dot);
+        }
+    }
+
     export interface ObjectAllocator {
         getNodeConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Node;
         getSourceFileConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => SourceFile;
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index af8dd8ceb69..373e5fc3388 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -2768,6 +2768,10 @@
         "category": "Error",
         "code": 6131
     },
+    "File name '{0}' has a '{1}' extension - stripping it": {
+        "category": "Message",
+        "code": 6132
+    },
 
     "Variable '{0}' implicitly has an '{1}' type.": {
         "category": "Error",
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 720b99d8900..c7b2cd66caf 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -615,11 +615,26 @@ namespace ts {
     }
 
     /**
-     * @param extensions - Either supportedTypeScriptExtensions or if --allowJs, allSupportedExtensions
      * @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
      * in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
      */
     function loadModuleFromFile(candidate: string, extensions: string[], failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string {
+        // First try to keep/add an extension: importing "./foo.ts" can be matched by a file "./foo.ts", and "./foo" by "./foo.d.ts"
+        const keepOrAddExtension = loadModuleFromFileWorker(candidate, extensions, failedLookupLocation, onlyRecordFailures, state);
+        if (keepOrAddExtension) {
+            return keepOrAddExtension;
+        }
+        // Then try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one, e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
+        if (hasJavaScriptFileExtension(candidate)) {
+            const extensionless = removeFileExtension(candidate);
+            if (state.traceEnabled) {
+                const extension = candidate.substring(extensionless.length);
+                trace(state.host, Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
+            }
+            return loadModuleFromFileWorker(extensionless, extensions, failedLookupLocation, onlyRecordFailures, state);
+        }
+    }
+    function loadModuleFromFileWorker(candidate: string, extensions: string[], failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string {
         if (!onlyRecordFailures) {
             // check if containig folder exists - if it doesn't then just record failures for all supported extensions without disk probing
             const directory = getDirectoryPath(candidate);
@@ -628,27 +643,12 @@ namespace ts {
             }
         }
 
-        // First try to keep/add an extension: importing "./foo.ts" can be matched by a file "./foo.ts", and "./foo" by "./foo.d.ts"
-        const keepOrAddExtension = forEach(extensions, ext => {
+        return forEach(extensions, ext => {
             if (state.skipTsx && (ext === ".jsx" || ext === ".tsx")) {
                 return;
             }
             return tryLoad(fileExtensionIs(candidate, ext) ? candidate : candidate + ext);
         });
-        if (keepOrAddExtension) {
-            return keepOrAddExtension;
-        }
-
-        // Then try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one, e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
-        return forEach(supportedJavascriptExtensions, jsExt => {
-            if (state.skipTsx && jsExt === ".jsx") {
-                return;
-            }
-            const extensionless = tryRemoveExtension(candidate, jsExt);
-            if (extensionless !== undefined) {
-                return forEach(supportedTypeScriptExtensions, tsExt => tryLoad(extensionless + tsExt));
-            }
-        });
 
         function tryLoad(fileName: string): string {
             if (!onlyRecordFailures && state.host.fileExists(fileName)) {
diff --git a/tests/baselines/reference/moduleResolution.trace.json b/tests/baselines/reference/moduleResolution.trace.json
new file mode 100644
index 00000000000..f51251810a7
--- /dev/null
+++ b/tests/baselines/reference/moduleResolution.trace.json
@@ -0,0 +1,32 @@
+[
+    "======== Resolving module './a' from 'C:/Users/anhans/TypeScript/tests/cases/compiler/b.ts'. ========",
+    "Module resolution kind is not specified, using 'NodeJs'.",
+    "Loading module as file / folder, candidate module location 'C:/Users/anhans/TypeScript/tests/cases/compiler/a'.",
+    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts' exist - use it as a name resolution result.",
+    "======== Module name './a' was successfully resolved to 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts'. ========",
+    "======== Resolving module './a.ts' from 'C:/Users/anhans/TypeScript/tests/cases/compiler/c.ts'. ========",
+    "Module resolution kind is not specified, using 'NodeJs'.",
+    "Loading module as file / folder, candidate module location 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts'.",
+    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts' exist - use it as a name resolution result.",
+    "======== Module name './a.ts' was successfully resolved to 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts'. ========",
+    "======== Resolving module './a.js' from 'C:/Users/anhans/TypeScript/tests/cases/compiler/d.ts'. ========",
+    "Module resolution kind is not specified, using 'NodeJs'.",
+    "Loading module as file / folder, candidate module location 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.js'.",
+    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.js.ts' does not exist.",
+    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.js.tsx' does not exist.",
+    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.js.d.ts' does not exist.",
+    "File name 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.js' has a '.js' extension - stripping it",
+    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts' exist - use it as a name resolution result.",
+    "======== Module name './a.js' was successfully resolved to 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts'. ========",
+    "======== Resolving module './jquery.js' from 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery_user_1.ts'. ========",
+    "Module resolution kind is not specified, using 'NodeJs'.",
+    "Loading module as file / folder, candidate module location 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.js'.",
+    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.js.ts' does not exist.",
+    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.js.tsx' does not exist.",
+    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.js.d.ts' does not exist.",
+    "File name 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.js' has a '.js' extension - stripping it",
+    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.ts' does not exist.",
+    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.tsx' does not exist.",
+    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.d.ts' exist - use it as a name resolution result.",
+    "======== Module name './jquery.js' was successfully resolved to 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.d.ts'. ========"
+]
\ No newline at end of file
diff --git a/tests/cases/compiler/moduleResolution.ts b/tests/cases/compiler/moduleResolution.ts
index c21614577c0..0af824100a7 100644
--- a/tests/cases/compiler/moduleResolution.ts
+++ b/tests/cases/compiler/moduleResolution.ts
@@ -1,3 +1,4 @@
+// @traceResolution: true
 // @Filename: a.ts
 export default 0;
 

From 3433a7800a01e045486e48bc06fffc551295086f Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Tue, 31 May 2016 12:35:12 -0700
Subject: [PATCH 139/332] Fix formatOnEnter for double newlines

---
 src/harness/fourslash.ts               | 10 ++++++++++
 src/services/formatting/formatting.ts  |  6 ++++++
 tests/cases/fourslash/formatOnEnter.ts | 17 +++++++++++++++++
 tests/cases/fourslash/fourslash.ts     |  1 +
 4 files changed, 34 insertions(+)
 create mode 100644 tests/cases/fourslash/formatOnEnter.ts

diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index 4a756ab3b1e..bd556c659c7 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -1486,6 +1486,12 @@ namespace FourSlash {
             this.fixCaretPosition();
         }
 
+        public formatOnType(pos: number, key: string) {
+            const edits = this.languageService.getFormattingEditsAfterKeystroke(this.activeFile.fileName, pos, key, this.formatCodeOptions);
+            this.currentCaretPosition += this.applyEdits(this.activeFile.fileName, edits, /*isFormattingEdit*/ true);
+            this.fixCaretPosition();
+        }
+
         private updateMarkersForEdit(fileName: string, minChar: number, limChar: number, text: string) {
             for (let i = 0; i < this.testData.markers.length; i++) {
                 const marker = this.testData.markers[i];
@@ -3223,6 +3229,10 @@ namespace FourSlashInterface {
             this.state.formatSelection(this.state.getMarkerByName(startMarker).position, this.state.getMarkerByName(endMarker).position);
         }
 
+        public onType(posMarker: string, key: string) {
+            this.state.formatOnType(this.state.getMarkerByName(posMarker).position, key);
+        }
+
         public setOption(name: string, value: number): void;
         public setOption(name: string, value: string): void;
         public setOption(name: string, value: boolean): void;
diff --git a/src/services/formatting/formatting.ts b/src/services/formatting/formatting.ts
index 2f5f10752f4..7127eb98006 100644
--- a/src/services/formatting/formatting.ts
+++ b/src/services/formatting/formatting.ts
@@ -81,6 +81,12 @@ namespace ts.formatting {
         while (isWhiteSpace(sourceFile.text.charCodeAt(endOfFormatSpan)) && !isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
             endOfFormatSpan--;
         }
+        // if the character at the end of the span is a line break, we shouldn't include it, because it indicates we don't want to
+        // touch the current line at all. Also, on some OSes the line break consists of two characters (\r\n), we should test if the
+        // previous character before the end of format span is line break character as well.
+        while (isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+            endOfFormatSpan--;
+        }
         const span = {
             // get start position for the previous line
             pos: getStartPositionOfLine(line - 1, sourceFile),
diff --git a/tests/cases/fourslash/formatOnEnter.ts b/tests/cases/fourslash/formatOnEnter.ts
new file mode 100644
index 00000000000..f505cf6cec7
--- /dev/null
+++ b/tests/cases/fourslash/formatOnEnter.ts
@@ -0,0 +1,17 @@
+/// <reference path="fourslash.ts"/>
+
+/////*3*/function listAPIFiles (path : string): string[] {
+////    /*1*/
+////    /*2*/
+////}
+
+goTo.marker("1");
+format.onType("1", "\n");
+verify.currentLineContentIs("    ");
+
+goTo.marker("2");
+format.onType("2", "\n");
+verify.currentLineContentIs("    ");
+
+goTo.marker("3");
+verify.currentLineContentIs("function listAPIFiles(path: string): string[] {");
\ No newline at end of file
diff --git a/tests/cases/fourslash/fourslash.ts b/tests/cases/fourslash/fourslash.ts
index 8a0d2d36364..71e1c3cc5d7 100644
--- a/tests/cases/fourslash/fourslash.ts
+++ b/tests/cases/fourslash/fourslash.ts
@@ -246,6 +246,7 @@ declare namespace FourSlashInterface {
         copyFormatOptions(): FormatCodeOptions;
         setFormatOptions(options: FormatCodeOptions): any;
         selection(startMarker: string, endMarker: string): void;
+        onType(posMarker: string, key: string): void;
         setOption(name: string, value: number): any;
         setOption(name: string, value: string): any;
         setOption(name: string, value: boolean): any;

From d4b88899840edd218ae2638538aebcaf7b13c15c Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Tue, 31 May 2016 12:58:05 -0700
Subject: [PATCH 140/332] Respond to more PR comments

---
 src/compiler/core.ts    | 7 -------
 src/compiler/program.ts | 9 +++++----
 2 files changed, 5 insertions(+), 11 deletions(-)

diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index 932acdc6324..ba81ee7d103 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -861,13 +861,6 @@ namespace ts {
         return fileExtensionIs(path, extension) ? path.substring(0, path.length - extension.length) : undefined;
     }
 
-    export function getFileExtension(path: string): string {
-        const dot = path.lastIndexOf(".");
-        if (dot !== -1) {
-            return path.substring(dot);
-        }
-    }
-
     export interface ObjectAllocator {
         getNodeConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Node;
         getSourceFileConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => SourceFile;
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index c7b2cd66caf..dd3102410ef 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -620,9 +620,9 @@ namespace ts {
      */
     function loadModuleFromFile(candidate: string, extensions: string[], failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string {
         // First try to keep/add an extension: importing "./foo.ts" can be matched by a file "./foo.ts", and "./foo" by "./foo.d.ts"
-        const keepOrAddExtension = loadModuleFromFileWorker(candidate, extensions, failedLookupLocation, onlyRecordFailures, state);
-        if (keepOrAddExtension) {
-            return keepOrAddExtension;
+        const resolvedByAddingOrKeepingExtension = loadModuleFromFileWorker(candidate, extensions, failedLookupLocation, onlyRecordFailures, state);
+        if (resolvedByAddingOrKeepingExtension) {
+            return resolvedByAddingOrKeepingExtension;
         }
         // Then try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one, e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
         if (hasJavaScriptFileExtension(candidate)) {
@@ -634,9 +634,10 @@ namespace ts {
             return loadModuleFromFileWorker(extensionless, extensions, failedLookupLocation, onlyRecordFailures, state);
         }
     }
+
     function loadModuleFromFileWorker(candidate: string, extensions: string[], failedLookupLocation: string[], onlyRecordFailures: boolean, state: ModuleResolutionState): string {
         if (!onlyRecordFailures) {
-            // check if containig folder exists - if it doesn't then just record failures for all supported extensions without disk probing
+            // check if containing folder exists - if it doesn't then just record failures for all supported extensions without disk probing
             const directory = getDirectoryPath(candidate);
             if (directory) {
                 onlyRecordFailures = !directoryProbablyExists(directory, state.host);

From 58fdd011df74f226f1909a2155896e43fc5c2042 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Tue, 31 May 2016 14:08:48 -0700
Subject: [PATCH 141/332] avoid eating all preceding empty lines

---
 src/services/formatting/formatting.ts               | 2 +-
 tests/cases/fourslash/{ => server}/formatOnEnter.ts | 0
 2 files changed, 1 insertion(+), 1 deletion(-)
 rename tests/cases/fourslash/{ => server}/formatOnEnter.ts (100%)

diff --git a/src/services/formatting/formatting.ts b/src/services/formatting/formatting.ts
index 7127eb98006..ef8fddcfb3a 100644
--- a/src/services/formatting/formatting.ts
+++ b/src/services/formatting/formatting.ts
@@ -84,7 +84,7 @@ namespace ts.formatting {
         // if the character at the end of the span is a line break, we shouldn't include it, because it indicates we don't want to
         // touch the current line at all. Also, on some OSes the line break consists of two characters (\r\n), we should test if the
         // previous character before the end of format span is line break character as well.
-        while (isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+        if (isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
             endOfFormatSpan--;
         }
         const span = {
diff --git a/tests/cases/fourslash/formatOnEnter.ts b/tests/cases/fourslash/server/formatOnEnter.ts
similarity index 100%
rename from tests/cases/fourslash/formatOnEnter.ts
rename to tests/cases/fourslash/server/formatOnEnter.ts

From 41446fe4c27820e5668e6a37ba7a2934d6dfa7ad Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 31 May 2016 14:33:00 -0700
Subject: [PATCH 142/332] Address CR feedback

---
 src/compiler/checker.ts | 32 +++++++++++++++-----------------
 1 file changed, 15 insertions(+), 17 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 037ab78413a..caaabdc96cd 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -8643,25 +8643,23 @@ namespace ts {
         function getContextuallyTypedParameterType(parameter: ParameterDeclaration): Type {
             const func = parameter.parent;
             if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
-                if (func.kind === SyntaxKind.FunctionExpression || func.kind === SyntaxKind.ArrowFunction) {
-                    const iife = getImmediatelyInvokedFunctionExpression(func);
-                    if (iife) {
-                        const indexOfParameter = indexOf(func.parameters, parameter);
-                        if (iife.arguments && indexOfParameter < iife.arguments.length) {
-                            if (parameter.dotDotDotToken) {
-                                const restTypes: Type[] = [];
-                                for (let i = indexOfParameter; i < iife.arguments.length; i++) {
-                                    restTypes.push(getTypeOfExpression(iife.arguments[i]));
-                                }
-                                return createArrayType(getUnionType(restTypes));
+                const iife = getImmediatelyInvokedFunctionExpression(func);
+                if (iife) {
+                    const indexOfParameter = indexOf(func.parameters, parameter);
+                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
+                        if (parameter.dotDotDotToken) {
+                            const restTypes: Type[] = [];
+                            for (let i = indexOfParameter; i < iife.arguments.length; i++) {
+                                restTypes.push(getTypeOfExpression(iife.arguments[i]));
                             }
-                            const links = getNodeLinks(iife);
-                            const cached = links.resolvedSignature;
-                            links.resolvedSignature = anySignature;
-                            const type = checkExpression(iife.arguments[indexOfParameter]);
-                            links.resolvedSignature = cached;
-                            return type;
+                            return createArrayType(getUnionType(restTypes));
                         }
+                        const links = getNodeLinks(iife);
+                        const cached = links.resolvedSignature;
+                        links.resolvedSignature = anySignature;
+                        const type = checkExpression(iife.arguments[indexOfParameter]);
+                        links.resolvedSignature = cached;
+                        return type;
                     }
                 }
                 const contextualSignature = getContextualSignature(func);

From eb0f035c78219ed920052094351326c5b35e1fe3 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Tue, 31 May 2016 16:08:12 -0700
Subject: [PATCH 143/332] Remove unused parameter

---
 src/compiler/parser.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 20f3d927e71..6f042627c6b 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -2725,7 +2725,7 @@ namespace ts {
             //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
             //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
             // Production (1) of AsyncArrowFunctionExpression is parsed in "tryParseAsyncSimpleArrowFunctionExpression".
-            // And production (2) is parsed in "tryParseParenthesizedArrowFunctionExpression". 
+            // And production (2) is parsed in "tryParseParenthesizedArrowFunctionExpression".
             //
             // If we do successfully parse arrow-function, we must *not* recurse for productions 1, 2 or 3. An ArrowFunction is
             // not a  LeftHandSideExpression, nor does it start a ConditionalExpression.  So we are done
@@ -6050,7 +6050,7 @@ namespace ts {
                 const saveParseDiagnosticsLength = parseDiagnostics.length;
                 const saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
 
-                const comment = parseJSDocCommentWorker(start, length, parent);
+                const comment = parseJSDocCommentWorker(start, length);
                 if (comment) {
                     comment.parent = parent;
                 }
@@ -6062,7 +6062,7 @@ namespace ts {
                 return comment;
             }
 
-            export function parseJSDocCommentWorker(start: number, length: number, parentNode?: Node): JSDocComment {
+            export function parseJSDocCommentWorker(start: number, length: number): JSDocComment {
                 const content = sourceText;
                 start = start || 0;
                 const end = length === undefined ? content.length : start + length;

From 9179f4ca42c81f9ebd6e054abe2ff5bb39a69554 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 1 Jun 2016 10:43:39 -0700
Subject: [PATCH 144/332] Fix test

---
 tests/baselines/reference/moduleResolution.js |  1 +
 .../reference/moduleResolution.symbols        | 17 +++---
 .../reference/moduleResolution.trace.json     | 52 +++++++++----------
 .../reference/moduleResolution.types          | 17 +++---
 tests/cases/compiler/moduleResolution.ts      | 15 +++---
 5 files changed, 53 insertions(+), 49 deletions(-)

diff --git a/tests/baselines/reference/moduleResolution.js b/tests/baselines/reference/moduleResolution.js
index be81b926062..101089b6355 100644
--- a/tests/baselines/reference/moduleResolution.js
+++ b/tests/baselines/reference/moduleResolution.js
@@ -1,6 +1,7 @@
 //// [tests/cases/compiler/moduleResolution.ts] ////
 
 //// [a.ts]
+
 export default 0;
 
 // No extension: '.ts' added
diff --git a/tests/baselines/reference/moduleResolution.symbols b/tests/baselines/reference/moduleResolution.symbols
index 2a51d416a4a..e9934946a64 100644
--- a/tests/baselines/reference/moduleResolution.symbols
+++ b/tests/baselines/reference/moduleResolution.symbols
@@ -1,22 +1,23 @@
-=== tests/cases/compiler/a.ts ===
-export default 0;
+=== /src/a.ts ===
+
+No type information for this code.export default 0;
 No type information for this code.
 No type information for this code.// No extension: '.ts' added
-No type information for this code.=== tests/cases/compiler/b.ts ===
+No type information for this code.=== /src/b.ts ===
 import a from './a';
 >a : Symbol(a, Decl(b.ts, 0, 6))
 
 // Matching extension
-=== tests/cases/compiler/c.ts ===
+=== /src/c.ts ===
 import a from './a.ts';
 >a : Symbol(a, Decl(c.ts, 0, 6))
 
 // '.js' extension: stripped and replaced with '.ts'
-=== tests/cases/compiler/d.ts ===
+=== /src/d.ts ===
 import a from './a.js';
 >a : Symbol(a, Decl(d.ts, 0, 6))
 
-=== tests/cases/compiler/jquery.d.ts ===
+=== /src/jquery.d.ts ===
 declare var x: number;
 >x : Symbol(x, Decl(jquery.d.ts, 0, 11))
 
@@ -24,12 +25,12 @@ export default x;
 >x : Symbol(x, Decl(jquery.d.ts, 0, 11))
 
 // No extension: '.d.ts' added
-=== tests/cases/compiler/jquery_user_1.ts ===
+=== /src/jquery_user_1.ts ===
 import j from "./jquery";
 >j : Symbol(j, Decl(jquery_user_1.ts, 0, 6))
 
 // '.js' extension: stripped and replaced with '.d.ts'
-=== tests/cases/compiler/jquery_user_1.ts ===
+=== /src/jquery_user_1.ts ===
 import j from "./jquery.js"
 >j : Symbol(j, Decl(jquery_user_1.ts, 0, 6))
 >j : Symbol(j, Decl(jquery_user_1.ts, 0, 6))
diff --git a/tests/baselines/reference/moduleResolution.trace.json b/tests/baselines/reference/moduleResolution.trace.json
index f51251810a7..6e6589d7c1f 100644
--- a/tests/baselines/reference/moduleResolution.trace.json
+++ b/tests/baselines/reference/moduleResolution.trace.json
@@ -1,32 +1,32 @@
 [
-    "======== Resolving module './a' from 'C:/Users/anhans/TypeScript/tests/cases/compiler/b.ts'. ========",
+    "======== Resolving module './a' from '/src/b.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
-    "Loading module as file / folder, candidate module location 'C:/Users/anhans/TypeScript/tests/cases/compiler/a'.",
-    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts' exist - use it as a name resolution result.",
-    "======== Module name './a' was successfully resolved to 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts'. ========",
-    "======== Resolving module './a.ts' from 'C:/Users/anhans/TypeScript/tests/cases/compiler/c.ts'. ========",
+    "Loading module as file / folder, candidate module location '/src/a'.",
+    "File '/src/a.ts' exist - use it as a name resolution result.",
+    "======== Module name './a' was successfully resolved to '/src/a.ts'. ========",
+    "======== Resolving module './a.ts' from '/src/c.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
-    "Loading module as file / folder, candidate module location 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts'.",
-    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts' exist - use it as a name resolution result.",
-    "======== Module name './a.ts' was successfully resolved to 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts'. ========",
-    "======== Resolving module './a.js' from 'C:/Users/anhans/TypeScript/tests/cases/compiler/d.ts'. ========",
+    "Loading module as file / folder, candidate module location '/src/a.ts'.",
+    "File '/src/a.ts' exist - use it as a name resolution result.",
+    "======== Module name './a.ts' was successfully resolved to '/src/a.ts'. ========",
+    "======== Resolving module './a.js' from '/src/d.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
-    "Loading module as file / folder, candidate module location 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.js'.",
-    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.js.ts' does not exist.",
-    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.js.tsx' does not exist.",
-    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.js.d.ts' does not exist.",
-    "File name 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.js' has a '.js' extension - stripping it",
-    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts' exist - use it as a name resolution result.",
-    "======== Module name './a.js' was successfully resolved to 'C:/Users/anhans/TypeScript/tests/cases/compiler/a.ts'. ========",
-    "======== Resolving module './jquery.js' from 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery_user_1.ts'. ========",
+    "Loading module as file / folder, candidate module location '/src/a.js'.",
+    "File '/src/a.js.ts' does not exist.",
+    "File '/src/a.js.tsx' does not exist.",
+    "File '/src/a.js.d.ts' does not exist.",
+    "File name '/src/a.js' has a '.js' extension - stripping it",
+    "File '/src/a.ts' exist - use it as a name resolution result.",
+    "======== Module name './a.js' was successfully resolved to '/src/a.ts'. ========",
+    "======== Resolving module './jquery.js' from '/src/jquery_user_1.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
-    "Loading module as file / folder, candidate module location 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.js'.",
-    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.js.ts' does not exist.",
-    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.js.tsx' does not exist.",
-    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.js.d.ts' does not exist.",
-    "File name 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.js' has a '.js' extension - stripping it",
-    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.ts' does not exist.",
-    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.tsx' does not exist.",
-    "File 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.d.ts' exist - use it as a name resolution result.",
-    "======== Module name './jquery.js' was successfully resolved to 'C:/Users/anhans/TypeScript/tests/cases/compiler/jquery.d.ts'. ========"
+    "Loading module as file / folder, candidate module location '/src/jquery.js'.",
+    "File '/src/jquery.js.ts' does not exist.",
+    "File '/src/jquery.js.tsx' does not exist.",
+    "File '/src/jquery.js.d.ts' does not exist.",
+    "File name '/src/jquery.js' has a '.js' extension - stripping it",
+    "File '/src/jquery.ts' does not exist.",
+    "File '/src/jquery.tsx' does not exist.",
+    "File '/src/jquery.d.ts' exist - use it as a name resolution result.",
+    "======== Module name './jquery.js' was successfully resolved to '/src/jquery.d.ts'. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/moduleResolution.types b/tests/baselines/reference/moduleResolution.types
index 2e1b0f560bc..fbc0091ee3b 100644
--- a/tests/baselines/reference/moduleResolution.types
+++ b/tests/baselines/reference/moduleResolution.types
@@ -1,22 +1,23 @@
-=== tests/cases/compiler/a.ts ===
-export default 0;
+=== /src/a.ts ===
+
+No type information for this code.export default 0;
 No type information for this code.
 No type information for this code.// No extension: '.ts' added
-No type information for this code.=== tests/cases/compiler/b.ts ===
+No type information for this code.=== /src/b.ts ===
 import a from './a';
 >a : number
 
 // Matching extension
-=== tests/cases/compiler/c.ts ===
+=== /src/c.ts ===
 import a from './a.ts';
 >a : number
 
 // '.js' extension: stripped and replaced with '.ts'
-=== tests/cases/compiler/d.ts ===
+=== /src/d.ts ===
 import a from './a.js';
 >a : number
 
-=== tests/cases/compiler/jquery.d.ts ===
+=== /src/jquery.d.ts ===
 declare var x: number;
 >x : number
 
@@ -24,12 +25,12 @@ export default x;
 >x : number
 
 // No extension: '.d.ts' added
-=== tests/cases/compiler/jquery_user_1.ts ===
+=== /src/jquery_user_1.ts ===
 import j from "./jquery";
 >j : number
 
 // '.js' extension: stripped and replaced with '.d.ts'
-=== tests/cases/compiler/jquery_user_1.ts ===
+=== /src/jquery_user_1.ts ===
 import j from "./jquery.js"
 >j : number
 >j : number
diff --git a/tests/cases/compiler/moduleResolution.ts b/tests/cases/compiler/moduleResolution.ts
index 0af824100a7..6ad35658623 100644
--- a/tests/cases/compiler/moduleResolution.ts
+++ b/tests/cases/compiler/moduleResolution.ts
@@ -1,27 +1,28 @@
 // @traceResolution: true
-// @Filename: a.ts
+
+// @Filename: /src/a.ts
 export default 0;
 
 // No extension: '.ts' added
-// @Filename: b.ts
+// @Filename: /src/b.ts
 import a from './a';
 
 // Matching extension
-// @Filename: c.ts
+// @Filename: /src/c.ts
 import a from './a.ts';
 
 // '.js' extension: stripped and replaced with '.ts'
-// @Filename: d.ts
+// @Filename: /src/d.ts
 import a from './a.js';
 
-// @Filename: jquery.d.ts
+// @Filename: /src/jquery.d.ts
 declare var x: number;
 export default x;
 
 // No extension: '.d.ts' added
-// @Filename: jquery_user_1.ts
+// @Filename: /src/jquery_user_1.ts
 import j from "./jquery";
 
 // '.js' extension: stripped and replaced with '.d.ts'
-// @Filename: jquery_user_1.ts
+// @Filename: /src/jquery_user_1.ts
 import j from "./jquery.js"

From 9a620bf616e1f6fac6d035ce43ad690455fa84a6 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Wed, 1 Jun 2016 11:39:22 -0700
Subject: [PATCH 145/332] Actually merge from master

---
 src/compiler/checker.ts | 11 -----------
 1 file changed, 11 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 52e70941408..ef11dc904ea 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -8156,23 +8156,12 @@ namespace ts {
                 return type;
             }
             const declaration = localOrExportSymbol.valueDeclaration;
-<<<<<<< HEAD
-            const defaultsToDeclaredType = !strictNullChecks || type.flags & TypeFlags.Any || !declaration ||
-                declaration.kind === SyntaxKind.Parameter || isInAmbientContext(declaration) ||
-                getContainingFunctionOrModule(declaration) !== getContainingFunctionOrModule(node);
-            if (defaultsToDeclaredType && type.flags & TypeFlags.NotNarrowable) {
-                return type;
-            }
-            const flowType = getFlowTypeOfReference(node, type, defaultsToDeclaredType ? type : undefinedType);
-            if (strictNullChecks && !(type.flags & TypeFlags.Any) && !(getNullableKind(type) & TypeFlags.Undefined) && getNullableKind(flowType) & TypeFlags.Undefined) {
-=======
             const includeOuterFunctions = isReadonlySymbol(localOrExportSymbol);
             const assumeInitialized = !strictNullChecks || (type.flags & TypeFlags.Any) !== 0 || !declaration ||
                 getRootDeclaration(declaration).kind === SyntaxKind.Parameter || isInAmbientContext(declaration) ||
                 !isDeclarationIncludedInFlow(node, declaration, includeOuterFunctions);
             const flowType = getFlowTypeOfReference(node, type, assumeInitialized, includeOuterFunctions);
             if (!assumeInitialized && !(getNullableKind(type) & TypeFlags.Undefined) && getNullableKind(flowType) & TypeFlags.Undefined) {
->>>>>>> master
                 error(node, Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
                 // Return the declared type to reduce follow-on errors
                 return type;

From 9575b3c3ca06935ab22e36d9d1dfb04b6c133bc4 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 1 Jun 2016 11:44:12 -0700
Subject: [PATCH 146/332] Revert to old tryLoad implementation

---
 src/compiler/program.ts | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index dd3102410ef..0c060807b1f 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -643,15 +643,13 @@ namespace ts {
                 onlyRecordFailures = !directoryProbablyExists(directory, state.host);
             }
         }
+        return forEach(extensions, tryLoad);
 
-        return forEach(extensions, ext => {
+        function tryLoad(ext: string): string {
             if (state.skipTsx && (ext === ".jsx" || ext === ".tsx")) {
-                return;
+                return undefined;
             }
-            return tryLoad(fileExtensionIs(candidate, ext) ? candidate : candidate + ext);
-        });
-
-        function tryLoad(fileName: string): string {
+            const fileName = fileExtensionIs(candidate, ext) ? candidate : candidate + ext;
             if (!onlyRecordFailures && state.host.fileExists(fileName)) {
                 if (state.traceEnabled) {
                     trace(state.host, Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);

From 0e96c5eaf134c5317febf417044a638b4ce6d70e Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Wed, 1 Jun 2016 22:57:25 -0700
Subject: [PATCH 147/332] Run fixupParentReferences when parsing isolated
 jsDocComment

---
 src/compiler/parser.ts                        | 21 +++++++++++++++++-
 ...tacticClassificationForJSDocTemplateTag.ts | 22 +++++++++++++++++++
 2 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100644 tests/cases/fourslash/syntacticClassificationForJSDocTemplateTag.ts

diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 6f042627c6b..13f16f3848a 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -440,7 +440,26 @@ namespace ts {
 
     /* @internal */
     export function parseIsolatedJSDocComment(content: string, start?: number, length?: number) {
-        return Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
+        const result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
+        if (result.jsDocComment) {
+            // because the jsDocComment was parsed out of the source file, it might
+            // not be covered by the fixupParentReferences.
+            let parentNode: Node = result.jsDocComment;
+            forEachChild(result.jsDocComment, visitNode);
+
+            function visitNode(n: Node): void {
+                if (n.parent !== parentNode) {
+                    n.parent = parentNode;
+
+                    const saveParent = parentNode;
+                    parentNode = n;
+                    forEachChild(n, visitNode);
+                    parentNode = saveParent;
+                }
+            }
+        }
+
+        return result;
     }
 
     /* @internal */
diff --git a/tests/cases/fourslash/syntacticClassificationForJSDocTemplateTag.ts b/tests/cases/fourslash/syntacticClassificationForJSDocTemplateTag.ts
new file mode 100644
index 00000000000..c3368207d2c
--- /dev/null
+++ b/tests/cases/fourslash/syntacticClassificationForJSDocTemplateTag.ts
@@ -0,0 +1,22 @@
+/// <reference path="fourslash.ts"/>
+
+/////** @template T */
+////function ident<T>: T {
+////}
+
+var c = classification;
+verify.syntacticClassificationsAre(
+    c.comment("/** "),
+    c.punctuation("@"),
+    c.docCommentTagName("template"),
+    c.typeParameterName("T"),
+    c.comment(" */"),
+    c.keyword("function"),
+    c.identifier("ident"),
+    c.punctuation("<"),
+    c.typeParameterName("T"),
+    c.punctuation(">"),
+    c.punctuation(":"),
+    c.identifier("T"),
+    c.punctuation("{"),
+    c.punctuation("}"));

From 92177bee913eb7d27b256d421f590290963e4c11 Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Thu, 2 Jun 2016 00:03:10 -0700
Subject: [PATCH 148/332] initial revision of unit test support for project
 system in tsserver

---
 Jakefile.js                                   |   3 +-
 src/server/editorServices.ts                  |   2 +-
 .../cases/unittests/tsserverProjectSystem.ts  | 294 ++++++++++++++++++
 3 files changed, 297 insertions(+), 2 deletions(-)
 create mode 100644 tests/cases/unittests/tsserverProjectSystem.ts

diff --git a/Jakefile.js b/Jakefile.js
index 2f0ce4aa399..c4f56c559f3 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -153,7 +153,8 @@ var harnessSources = harnessCoreSources.concat([
     "tsconfigParsing.ts",
     "commandLineParsing.ts",
     "convertCompilerOptionsFromJson.ts",
-    "convertTypingOptionsFromJson.ts"
+    "convertTypingOptionsFromJson.ts",
+    "tsserverProjectSystem.ts"
 ].map(function (f) {
     return path.join(unittestsDirectory, f);
 })).concat([
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 5502f74408e..8eae43b503d 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -1138,7 +1138,7 @@ namespace ts.server {
             else {
                 this.log("No config files found.");
             }
-            return {};
+            return configFileName ? { configFileName } : {};
         }
 
         /**
diff --git a/tests/cases/unittests/tsserverProjectSystem.ts b/tests/cases/unittests/tsserverProjectSystem.ts
new file mode 100644
index 00000000000..c69821ced5f
--- /dev/null
+++ b/tests/cases/unittests/tsserverProjectSystem.ts
@@ -0,0 +1,294 @@
+/// <reference path="..\..\..\src\harness\harness.ts" />
+
+namespace ts {
+    function notImplemented(): any {
+        throw new Error("Not yet implemented");
+    }
+
+    const nullLogger: server.Logger = {
+        close: () => void 0,
+        isVerbose: () => void 0,
+        loggingEnabled: () => false,
+        perftrc: () => void 0,
+        info: () => void 0,
+        startGroup: () => void 0,
+        endGroup: () => void 0,
+        msg: () => void 0
+    };
+
+    const { content: libFileContent } = Harness.getDefaultLibraryFile(Harness.IO);
+
+    function getExecutingFilePathFromLibFile(libFile: FileOrFolder): string {
+        return combinePaths(getDirectoryPath(libFile.path), "tsc.js");
+    }
+
+    interface FileOrFolder {
+        path: string;
+        content?: string;
+    }
+
+    interface FSEntry {
+        path: Path;
+        fullPath: string;
+    }
+
+    interface File extends FSEntry {
+        content: string;
+    }
+
+    interface Folder extends FSEntry {
+        entries: FSEntry[];
+    }
+
+    function isFolder(s: FSEntry): s is Folder {
+        return isArray((<Folder>s).entries);
+    }
+
+    function isFile(s: FSEntry): s is File {
+        return typeof (<File>s).content === "string";
+    }
+
+    function addFolder(fullPath: string, toPath: (s: string) => Path, fs: FileMap<FSEntry>): Folder {
+        const path = toPath(fullPath);
+        if (fs.contains(path)) {
+            Debug.assert(isFolder(fs.get(path)));
+            return (<Folder>fs.get(path));
+        }
+
+        const entry: Folder = { path, entries: [], fullPath };
+        fs.set(path, entry);
+
+        const baseFullPath = getDirectoryPath(fullPath);
+        if (fullPath !== baseFullPath) {
+            addFolder(baseFullPath, toPath, fs).entries.push(entry);
+        }
+
+        return entry;
+    }
+
+    function sizeOfMap(map: Map<any>): number {
+        let n = 0;
+        for (const name in map) {
+            if (hasProperty(map, name)) {
+                n++;
+            }
+        }
+        return n;
+    }
+
+    function checkMapKeys(caption: string, map: Map<any>, expectedKeys: string[]) {
+        assert.equal(sizeOfMap(map), expectedKeys.length, `${caption}: incorrect size of map`);
+        for (const name of expectedKeys) {
+            assert.isTrue(hasProperty(map, name), `${caption} is expected to contain ${name}, actual keys: ${getKeys(map)}`);
+        }
+    }
+
+    function checkFileNames(caption: string, actualFileNames: string[], expectedFileNames: string[]) {
+        assert.equal(actualFileNames.length, expectedFileNames.length, `${caption}: incorrect actual number of files, expected ${JSON.stringify(expectedFileNames)}, got ${actualFileNames}`);
+        for (const f of expectedFileNames) {
+            assert.isTrue(contains(actualFileNames, f), `${caption}: expected to find ${f} in ${JSON.stringify(actualFileNames)}`);
+        }
+    }
+
+    function readDirectory(folder: FSEntry, ext: string, excludes: Path[], result: string[]): void {
+        if (!folder || !isFolder(folder) || contains(excludes, folder.path)) {
+            return;
+        }
+        for (const entry of folder.entries) {
+            if (contains(excludes, entry.path)) {
+                continue;
+            }
+            if (isFolder(entry)) {
+                readDirectory(entry, ext, excludes, result);
+            }
+            else if (fileExtensionIs(entry.path, ext)) {
+                result.push(entry.fullPath);
+            }
+        }
+    }
+
+    class TestServerHost implements server.ServerHost {
+        args: string[] = [];
+        newLine: "\n";
+
+        private fs: ts.FileMap<FSEntry>;
+        private getCanonicalFileName: (s: string) => string;
+        private toPath: (f: string) => Path;
+        readonly watchedDirectories: Map<{ cb: DirectoryWatcherCallback, recursive: boolean }[]> = {};
+        readonly watchedFiles: Map<FileWatcherCallback[]> = {};
+
+        constructor(public useCaseSensitiveFileNames: boolean, private executingFilePath: string, private currentDirectory: string, fileOrFolderList: FileOrFolder[]) {
+            this.getCanonicalFileName = createGetCanonicalFileName(useCaseSensitiveFileNames);
+            this.toPath = s => toPath(s, currentDirectory, this.getCanonicalFileName);
+
+            this.reloadFS(fileOrFolderList);
+        }
+
+        reloadFS(filesOrFolders: FileOrFolder[]) {
+            this.fs = createFileMap<FSEntry>();
+            for (const fileOrFolder of filesOrFolders) {
+                const path = this.toPath(fileOrFolder.path);
+                const fullPath = getNormalizedAbsolutePath(fileOrFolder.path, this.currentDirectory);
+                if (typeof fileOrFolder.content === "string") {
+                    const entry = { path, content: fileOrFolder.content, fullPath };
+                    this.fs.set(path, entry);
+                    addFolder(getDirectoryPath(fullPath), this.toPath, this.fs).entries.push(entry);
+                }
+                else {
+                    addFolder(fullPath, this.toPath, this.fs);
+                }
+            }
+        }
+
+        fileExists(s: string) {
+            const path = this.toPath(s);
+            return this.fs.contains(path) && isFile(this.fs.get(path));
+        };
+
+        directoryExists(s: string) {
+            const path = this.toPath(s);
+            return this.fs.contains(path) && isFolder(this.fs.get(path));
+        }
+
+        getDirectories(s: string) {
+            const path = this.toPath(s);
+            if (!this.fs.contains(path)) {
+                return [];
+            }
+            else {
+                const entry = this.fs.get(path);
+                return isFolder(entry) ? map(entry.entries, x => getBaseFileName(x.fullPath)) : [];
+            }
+        }
+
+        readDirectory(path: string, ext: string, excludes: string[]): string[] {
+            const result: string[] = [];
+            readDirectory(this.fs.get(this.toPath(path)), ext, map(excludes, e => toPath(e, path, this.getCanonicalFileName)), result);
+            return result;
+        }
+
+        watchDirectory(directoryName: string, callback: DirectoryWatcherCallback, recursive: boolean): DirectoryWatcher {
+            const path = this.toPath(directoryName);
+            const callbacks = lookUp(this.watchedDirectories, path) || (this.watchedDirectories[path] = []);
+            callbacks.push({ cb: callback, recursive });
+            return {
+                referenceCount: 0,
+                directoryName,
+                close: () => {
+                    for (let i = 0; i < callbacks.length; i++) {
+                        if (callbacks[i].cb === callback) {
+                            callbacks.splice(i, 1);
+                            break;
+                        }
+                    }
+                    if (!callbacks.length) {
+                        delete this.watchedDirectories[path];
+                    }
+                }
+            };
+        }
+
+        watchFile(fileName: string, callback: FileWatcherCallback) {
+            const path = this.toPath(fileName);
+            const callbacks = lookUp(this.watchedFiles, path) || (this.watchedFiles[path] = []);
+            callbacks.push(callback);
+            return {
+                close: () => {
+                    const i = callbacks.indexOf(callback);
+                    callbacks.splice(i, 1);
+                    if (!callbacks.length) {
+                        delete this.watchedFiles[path];
+                    }
+                }
+            };
+        }
+
+        // TOOD: record and invoke callbacks to simulate timer events
+        readonly setTimeout = (callback: (...args: any[]) => void, ms: number, ...args: any[]): any => void 0;
+        readonly clearTimeout = (timeoutId: any): void => void 0;
+        readonly readFile = (s: string) => (<File>this.fs.get(this.toPath(s))).content;
+        readonly resolvePath = (s: string) => s;
+        readonly getExecutingFilePath = () => this.executingFilePath;
+        readonly getCurrentDirectory = () => this.currentDirectory;
+        readonly writeFile = (path: string, content: string) => notImplemented();
+        readonly write = (s: string) => notImplemented();
+        readonly createDirectory = (s: string) => notImplemented();
+        readonly exit = () => notImplemented();
+    }
+
+    describe("tsserver project system:", () => {
+        it("create inferred project", () => {
+            const appFile: FileOrFolder = {
+                path: "/a/b/c/app.ts",
+                content: `
+                import {f} from "./module"
+                console.log(f)
+                `
+            };
+            const libFile: FileOrFolder = {
+                path: "/a/lib/lib.d.ts",
+                content: libFileContent
+            };
+            const moduleFile: FileOrFolder = {
+                path: "/a/b/c/module.d.ts",
+                content: `export let x: number`
+            };
+            const host = new TestServerHost(/*useCaseSensitiveFileNames*/ false, getExecutingFilePathFromLibFile(libFile), "/", [appFile, moduleFile, libFile]);
+            const projectService = new server.ProjectService(host, nullLogger);
+            const { configFileName } = projectService.openClientFile(appFile.path);
+
+            assert(!configFileName, `should not find config, got: '${configFileName}`);
+            assert.equal(projectService.inferredProjects.length, 1, "expected one inferred project");
+            assert.equal(projectService.configuredProjects.length, 0, "expected no configured project");
+
+            const project = projectService.inferredProjects[0];
+
+            checkFileNames("inferred project", project.getFileNames(), [appFile.path, libFile.path, moduleFile.path]);
+            checkMapKeys("watchedDirectories", host.watchedDirectories, ["/a/b/c", "/a/b", "/a"]);
+        });
+
+        it("create configured project without file list", () => {
+            const configFile: FileOrFolder = {
+                path: "/a/b/tsconfig.json",
+                content: `
+                {
+                    "compilerOptions": {},
+                    "exclude": [
+                        "e"
+                    ]
+                }`
+            };
+            const libFile: FileOrFolder = {
+                path: "/a/lib/lib.d.ts",
+                content: libFileContent
+            };
+            const file1: FileOrFolder = {
+                path: "/a/b/c/f1.ts",
+                content: "let x = 1"
+            };
+            const file2: FileOrFolder = {
+                path: "/a/b/d/f2.ts",
+                content: "let y = 1"
+            };
+            const file3: FileOrFolder = {
+                path: "/a/b/e/f3.ts",
+                content: "let z = 1"
+            };
+            const host = new TestServerHost(/*useCaseSensitiveFileNames*/ false, getExecutingFilePathFromLibFile(libFile), "/", [ configFile, libFile, file1, file2, file3 ]);
+            const projectService = new server.ProjectService(host, nullLogger);
+            const { configFileName, configFileErrors } = projectService.openClientFile(file1.path);
+
+            assert(configFileName, "should find config file");
+            assert.isTrue(!configFileErrors, `expect no errors in config file, got ${JSON.stringify(configFileErrors)}`);
+            assert.equal(projectService.inferredProjects.length, 0, "expected no inferred project");
+            assert.equal(projectService.configuredProjects.length, 1, "expected one configured project");
+
+            const project = projectService.configuredProjects[0];
+            checkFileNames("configuredProjects project, actualFileNames", project.getFileNames(), [file1.path, libFile.path, file2.path]);
+            checkFileNames("configuredProjects project, rootFileNames", project.getRootFiles(), [file1.path, file2.path]);
+
+            checkMapKeys("watchedFiles", host.watchedFiles, [configFile.path, file2.path, libFile.path]); // watching all files except one that was open
+            checkMapKeys("watchedDirectories", host.watchedDirectories, [getDirectoryPath(configFile.path)]);
+        });
+    });
+}
\ No newline at end of file

From 3b1982589007e0419c025ad716ec47e7ff2566cf Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 2 Jun 2016 05:43:40 -0700
Subject: [PATCH 149/332] Allow wildcard ("*") patterns in ambient module
 declarations

---
 src/compiler/binder.ts                        |  21 +++-
 src/compiler/checker.ts                       |  26 +++++
 src/compiler/program.ts                       | 110 ++++++++++++------
 src/compiler/types.ts                         |  13 +++
 .../ambientDeclarationsPatterns.errors.txt    |  25 ++++
 .../reference/ambientDeclarationsPatterns.js  |  28 +++++
 .../ambient/ambientDeclarationsPatterns.ts    |  19 +++
 7 files changed, 207 insertions(+), 35 deletions(-)
 create mode 100644 tests/baselines/reference/ambientDeclarationsPatterns.errors.txt
 create mode 100644 tests/baselines/reference/ambientDeclarationsPatterns.js
 create mode 100644 tests/cases/conformance/ambient/ambientDeclarationsPatterns.ts

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 5fdfc7f02be..d3363285afc 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -1287,7 +1287,26 @@ namespace ts {
                     declareSymbolAndAddToSymbolTable(node, SymbolFlags.NamespaceModule, SymbolFlags.NamespaceModuleExcludes);
                 }
                 else {
-                    declareSymbolAndAddToSymbolTable(node, SymbolFlags.ValueModule, SymbolFlags.ValueModuleExcludes);
+                    let pattern: Pattern | undefined;
+                    if (node.name.kind === SyntaxKind.StringLiteral) {
+                        const text = (<StringLiteral>node.name).text;
+                        if (hasZeroOrOneAsteriskCharacter(text)) {
+                            pattern = tryParsePattern(text);
+                        }
+                        else {
+                            errorOnFirstToken(node.name, Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, text);
+                        }
+                    }
+
+                    if (pattern) {
+                        // TODO: don't really need such a symbol in container.locals...
+                        const symbol = declareSymbol(container.locals, undefined, node, SymbolFlags.ValueModule, SymbolFlags.ValueModuleExcludes);
+                        file.patternAmbientModules = file.patternAmbientModules || [];
+                        file.patternAmbientModules.push({ pattern, symbol });
+                    }
+                    else {
+                        declareSymbolAndAddToSymbolTable(node, SymbolFlags.ValueModule, SymbolFlags.ValueModuleExcludes);
+                    }
                 }
             }
             else {
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 06ef2463402..3e66cf1661f 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -140,6 +140,12 @@ namespace ts {
         const enumNumberIndexInfo = createIndexInfo(stringType, /*isReadonly*/ true);
 
         const globals: SymbolTable = {};
+        /**
+         * List of every ambient module with a "*" wildcard.
+         * Unlike other ambient modules, these can't be stored in `globals` because symbol tables only deal with exact matches.
+         * This is only used if there is no exact match.
+        */
+        let patternAmbientModules: PatternAmbientModule[];
 
         let getGlobalESSymbolConstructorSymbol: () => Symbol;
 
@@ -1285,6 +1291,12 @@ namespace ts {
                 }
                 return undefined;
             }
+
+            const patternModuleSymbol = getPatternAmbientModule(moduleName);
+            if (patternModuleSymbol) {
+                return getMergedSymbol(patternModuleSymbol);
+            }
+
             if (moduleNotFoundError) {
                 // report errors only if it was requested
                 error(moduleReferenceLiteral, moduleNotFoundError, moduleName);
@@ -1292,6 +1304,16 @@ namespace ts {
             return undefined;
         }
 
+        /** Get an ambient module with a wildcard ("*") in it. */
+        function getPatternAmbientModule(name: string): Symbol | undefined {
+            if (patternAmbientModules) {
+                const pattern = findBestPatternMatch(patternAmbientModules, _ => _.pattern, name);
+                if (pattern) {
+                    return pattern.symbol;
+                }
+            }
+        }
+
         // An external module with an 'export =' declaration resolves to the target of the 'export =' declaration,
         // and an external module with no 'export =' declaration resolves to the module itself.
         function resolveExternalModuleSymbol(moduleSymbol: Symbol): Symbol {
@@ -17627,6 +17649,10 @@ namespace ts {
                 if (!isExternalOrCommonJsModule(file)) {
                     mergeSymbolTable(globals, file.locals);
                 }
+                if (file.patternAmbientModules && file.patternAmbientModules.length) {
+                    (patternAmbientModules || (patternAmbientModules = [])).push(...file.patternAmbientModules);
+                }
+
                 if (file.moduleAugmentations.length) {
                     (augmentations || (augmentations = [])).push(file.moduleAugmentations);
                 }
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index bab554927e7..1677f61c15d 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -95,7 +95,7 @@ namespace ts {
         return compilerOptions.traceResolution && host.trace !== undefined;
     }
 
-    function hasZeroOrOneAsteriskCharacter(str: string): boolean {
+    export function hasZeroOrOneAsteriskCharacter(str: string): boolean {
         let seenAsterisk = false;
         for (let i = 0; i < str.length; i++) {
             if (str.charCodeAt(i) === CharacterCodes.asterisk) {
@@ -496,48 +496,23 @@ namespace ts {
             trace(state.host, Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
         }
 
-        let longestMatchPrefixLength = -1;
-        let matchedPattern: string;
-        let matchedStar: string;
-
+        // string is for exact match
+        let matchedPattern: Pattern | string | undefined = undefined;
         if (state.compilerOptions.paths) {
             if (state.traceEnabled) {
                 trace(state.host, Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
             }
-
-            for (const key in state.compilerOptions.paths) {
-                const pattern: string = key;
-                const indexOfStar = pattern.indexOf("*");
-                if (indexOfStar !== -1) {
-                    const prefix = pattern.substr(0, indexOfStar);
-                    const suffix = pattern.substr(indexOfStar + 1);
-                    if (moduleName.length >= prefix.length + suffix.length &&
-                        startsWith(moduleName, prefix) &&
-                        endsWith(moduleName, suffix)) {
-
-                        // use length of prefix as betterness criteria
-                        if (prefix.length > longestMatchPrefixLength) {
-                            longestMatchPrefixLength = prefix.length;
-                            matchedPattern = pattern;
-                            matchedStar = moduleName.substr(prefix.length, moduleName.length - suffix.length);
-                        }
-                    }
-                }
-                else if (pattern === moduleName) {
-                    // pattern was matched as is - no need to search further
-                    matchedPattern = pattern;
-                    matchedStar = undefined;
-                    break;
-                }
-            }
+            matchedPattern = matchPatternOrExact(Object.keys(state.compilerOptions.paths), moduleName);
         }
 
         if (matchedPattern) {
+            const matchedStar = typeof matchedPattern === "string" ? undefined : matchedText(matchedPattern, moduleName);
+            const matchedPatternText = typeof matchedPattern === "string" ? matchedPattern : patternText(matchedPattern);
             if (state.traceEnabled) {
-                trace(state.host, Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPattern);
+                trace(state.host, Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPatternText);
             }
-            for (const subst of state.compilerOptions.paths[matchedPattern]) {
-                const path = matchedStar ? subst.replace("\*", matchedStar) : subst;
+            for (const subst of state.compilerOptions.paths[matchedPatternText]) {
+                const path = matchedStar ? subst.replace("*", matchedStar) : subst;
                 const candidate = normalizePath(combinePaths(state.compilerOptions.baseUrl, path));
                 if (state.traceEnabled) {
                     trace(state.host, Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
@@ -560,6 +535,73 @@ namespace ts {
         }
     }
 
+    /**
+     * patternStrings contains both pattern strings (containing "*") and regular strings.
+     * Return an exact match if possible, or a pattern match, or undefined.
+     * (These are verified by verifyCompilerOptions to have 0 or 1 "*" characters.)
+     */
+    function matchPatternOrExact(patternStrings: string[], candidate: string): string | Pattern | undefined {
+        const patterns: Pattern[] = [];
+        for (const patternString of patternStrings) {
+            const pattern = tryParsePattern(patternString);
+            if (pattern) {
+                patterns.push(pattern);
+            }
+            else if (patternString === candidate) {
+                // pattern was matched as is - no need to search further
+                return patternString;
+            }
+        }
+
+        return findBestPatternMatch(patterns, _ => _, candidate);
+    }
+
+    function patternText({prefix, suffix}: Pattern): string {
+        return `${prefix}*${suffix}`;
+    }
+
+    /**
+     * Given that candidate matches pattern, returns the text matching the '*'.
+     * E.g.: matchedText(tryParsePattern("foo*baz"), "foobarbaz") === "bar"
+     */
+    function matchedText(pattern: Pattern, candidate: string): string {
+        Debug.assert(isPatternMatch(pattern, candidate));
+        return candidate.substr(pattern.prefix.length, candidate.length - pattern.suffix.length);
+    }
+
+    /** Return the object corresponding to the best pattern to match `candidate`. */
+    export function findBestPatternMatch<T>(values: T[], getPattern: (value: T) => Pattern, candidate: string): T | undefined {
+        let matchedValue: T | undefined = undefined;
+        // use length of prefix as betterness criteria
+        let longestMatchPrefixLength = -1;
+
+        for (const v of values) {
+            const pattern = getPattern(v);
+            if (isPatternMatch(pattern, candidate) && pattern.prefix.length > longestMatchPrefixLength) {
+                longestMatchPrefixLength = pattern.prefix.length;
+                matchedValue = v;
+            }
+        }
+
+        return matchedValue;
+    }
+
+    function isPatternMatch({prefix, suffix}: Pattern, candidate: string) {
+        return candidate.length >= prefix.length + suffix.length &&
+               startsWith(candidate, prefix) &&
+               endsWith(candidate, suffix);
+    }
+
+    export function tryParsePattern(pattern: string): Pattern | undefined {
+        // This should be verified outside of here and a proper error thrown.
+        Debug.assert(hasZeroOrOneAsteriskCharacter(pattern));
+        const indexOfStar = pattern.indexOf("*");
+        return indexOfStar === -1 ? undefined : {
+            prefix: pattern.substr(0, indexOfStar),
+            suffix: pattern.substr(indexOfStar + 1)
+        };
+    }
+
     export function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations {
         const containingDirectory = getDirectoryPath(containingFile);
         const supportedExtensions = getSupportedExtensions(compilerOptions);
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index c7e14a10031..a6f19f121cf 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1658,6 +1658,7 @@ namespace ts {
         /* @internal */ resolvedTypeReferenceDirectiveNames: Map<ResolvedTypeReferenceDirective>;
         /* @internal */ imports: LiteralExpression[];
         /* @internal */ moduleAugmentations: LiteralExpression[];
+        /* @internal */ patternAmbientModules?: PatternAmbientModule[];
     }
 
     export interface ScriptReferenceHost {
@@ -2135,6 +2136,18 @@ namespace ts {
         [index: string]: Symbol;
     }
 
+    /** Represents a "prefix*suffix" pattern. */
+    export interface Pattern {
+        prefix: string;
+        suffix: string;
+    }
+    
+    /** Used to track a `declare module "foo*"`-like declaration. */
+    export interface PatternAmbientModule {
+        pattern: Pattern;
+        symbol: Symbol;
+    }
+
     /* @internal */
     export const enum NodeCheckFlags {
         TypeChecked                         = 0x00000001,  // Node has been type checked
diff --git a/tests/baselines/reference/ambientDeclarationsPatterns.errors.txt b/tests/baselines/reference/ambientDeclarationsPatterns.errors.txt
new file mode 100644
index 00000000000..c197fe54f8d
--- /dev/null
+++ b/tests/baselines/reference/ambientDeclarationsPatterns.errors.txt
@@ -0,0 +1,25 @@
+tests/cases/conformance/ambient/declarations.d.ts(6,16): error TS5061: Pattern 'too*many*asterisks' can have at most one '*' character
+
+
+==== tests/cases/conformance/ambient/user.ts (0 errors) ====
+    ///<reference path="declarations.d.ts" />
+    import {foo} from "foobarbaz";
+    foo(0);
+    
+    import {foos} from "foosball";
+    
+==== tests/cases/conformance/ambient/declarations.d.ts (1 errors) ====
+    declare module "foo*baz" {
+        export function foo(n: number): void;
+    }
+    
+    // Should be an error
+    declare module "too*many*asterisks" { }
+                   ~~~~~~~~~~~~~~~~~~~~
+!!! error TS5061: Pattern 'too*many*asterisks' can have at most one '*' character
+    
+    // Longest prefix wins
+    declare module "foos*" {
+        export const foos: number;
+    }
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/ambientDeclarationsPatterns.js b/tests/baselines/reference/ambientDeclarationsPatterns.js
new file mode 100644
index 00000000000..056416f1086
--- /dev/null
+++ b/tests/baselines/reference/ambientDeclarationsPatterns.js
@@ -0,0 +1,28 @@
+//// [tests/cases/conformance/ambient/ambientDeclarationsPatterns.ts] ////
+
+//// [declarations.d.ts]
+declare module "foo*baz" {
+    export function foo(n: number): void;
+}
+
+// Should be an error
+declare module "too*many*asterisks" { }
+
+// Longest prefix wins
+declare module "foos*" {
+    export const foos: number;
+}
+
+//// [user.ts]
+///<reference path="declarations.d.ts" />
+import {foo} from "foobarbaz";
+foo(0);
+
+import {foos} from "foosball";
+
+
+//// [user.js]
+"use strict";
+///<reference path="declarations.d.ts" />
+var foobarbaz_1 = require("foobarbaz");
+foobarbaz_1.foo(0);
diff --git a/tests/cases/conformance/ambient/ambientDeclarationsPatterns.ts b/tests/cases/conformance/ambient/ambientDeclarationsPatterns.ts
new file mode 100644
index 00000000000..0d3b2e1c60e
--- /dev/null
+++ b/tests/cases/conformance/ambient/ambientDeclarationsPatterns.ts
@@ -0,0 +1,19 @@
+// @Filename: declarations.d.ts
+declare module "foo*baz" {
+    export function foo(n: number): void;
+}
+
+// Should be an error
+declare module "too*many*asterisks" { }
+
+// Longest prefix wins
+declare module "foos*" {
+    export const foos: number;
+}
+
+// @Filename: user.ts
+///<reference path="declarations.d.ts" />
+import {foo} from "foobarbaz";
+foo(0);
+
+import {foos} from "foosball";

From 251723826962cc3fa3cc2d766c17dc197099cce3 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 2 Jun 2016 06:32:14 -0700
Subject: [PATCH 150/332] Add non-widening forms of null and undefined

---
 src/compiler/checker.ts | 37 ++++++++++++++++++++-----------------
 src/compiler/types.ts   |  6 +++---
 2 files changed, 23 insertions(+), 20 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 06ef2463402..6166234dcf4 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -110,16 +110,17 @@ namespace ts {
         const unknownSymbol = createSymbol(SymbolFlags.Property | SymbolFlags.Transient, "unknown");
         const resolvingSymbol = createSymbol(SymbolFlags.Transient, "__resolving__");
 
-        const nullableWideningFlags = strictNullChecks ? 0 : TypeFlags.ContainsUndefinedOrNull;
         const anyType = createIntrinsicType(TypeFlags.Any, "any");
         const stringType = createIntrinsicType(TypeFlags.String, "string");
         const numberType = createIntrinsicType(TypeFlags.Number, "number");
         const booleanType = createIntrinsicType(TypeFlags.Boolean, "boolean");
         const esSymbolType = createIntrinsicType(TypeFlags.ESSymbol, "symbol");
         const voidType = createIntrinsicType(TypeFlags.Void, "void");
-        const undefinedType = createIntrinsicType(TypeFlags.Undefined | nullableWideningFlags, "undefined");
-        const nullType = createIntrinsicType(TypeFlags.Null | nullableWideningFlags, "null");
-        const emptyArrayElementType = createIntrinsicType(TypeFlags.Undefined | TypeFlags.ContainsUndefinedOrNull, "undefined");
+        const undefinedType = createIntrinsicType(TypeFlags.Undefined, "undefined");
+        const undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(TypeFlags.Undefined | TypeFlags.ContainsWideningType, "undefined");
+        const nullType = createIntrinsicType(TypeFlags.Null, "null");
+        const nullWideningType = strictNullChecks ? nullType : createIntrinsicType(TypeFlags.Null | TypeFlags.ContainsWideningType, "null");
+        const emptyArrayElementType = createIntrinsicType(TypeFlags.Undefined | TypeFlags.ContainsWideningType, "undefined");
         const unknownType = createIntrinsicType(TypeFlags.Any, "unknown");
         const neverType = createIntrinsicType(TypeFlags.Never, "never");
 
@@ -3405,7 +3406,7 @@ namespace ts {
                     error(type.symbol.valueDeclaration, Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
                     return type.resolvedBaseConstructorType = unknownType;
                 }
-                if (baseConstructorType !== unknownType && baseConstructorType !== nullType && !isConstructorType(baseConstructorType)) {
+                if (baseConstructorType !== unknownType && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
                     error(baseTypeNode.expression, Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
                     return type.resolvedBaseConstructorType = unknownType;
                 }
@@ -5011,6 +5012,7 @@ namespace ts {
             containsAny?: boolean;
             containsUndefined?: boolean;
             containsNull?: boolean;
+            containsNonWideningType?: boolean;
         }
 
         function addTypeToSet(typeSet: TypeSet, type: Type, typeSetKind: TypeFlags) {
@@ -5021,6 +5023,7 @@ namespace ts {
                 if (type.flags & TypeFlags.Any) typeSet.containsAny = true;
                 if (type.flags & TypeFlags.Undefined) typeSet.containsUndefined = true;
                 if (type.flags & TypeFlags.Null) typeSet.containsNull = true;
+                if (!(type.flags & TypeFlags.ContainsWideningType)) typeSet.containsNonWideningType = true;
             }
             else if (type !== neverType && !contains(typeSet, type)) {
                 typeSet.push(type);
@@ -5081,8 +5084,8 @@ namespace ts {
                 removeSubtypes(typeSet);
             }
             if (typeSet.length === 0) {
-                return typeSet.containsNull ? nullType :
-                    typeSet.containsUndefined ? undefinedType :
+                return typeSet.containsNull ? typeSet.containsNonWideningType ? nullType : nullWideningType :
+                    typeSet.containsUndefined ? typeSet.containsNonWideningType ? undefinedType : undefinedWideningType :
                     neverType;
             }
             else if (typeSet.length === 1) {
@@ -5882,7 +5885,7 @@ namespace ts {
                 if (!(target.flags & TypeFlags.Never)) {
                     if (target.flags & TypeFlags.Any || source.flags & TypeFlags.Never) return Ternary.True;
                     if (source.flags & TypeFlags.Undefined) {
-                        if (!strictNullChecks || target.flags & (TypeFlags.Undefined | TypeFlags.Void) || source === emptyArrayElementType) return Ternary.True;
+                        if (!strictNullChecks || target.flags & (TypeFlags.Undefined | TypeFlags.Void)) return Ternary.True;
                     }
                     if (source.flags & TypeFlags.Null) {
                         if (!strictNullChecks || target.flags & TypeFlags.Null) return Ternary.True;
@@ -6972,7 +6975,7 @@ namespace ts {
             if (type.flags & TypeFlags.ObjectLiteral) {
                 for (const p of getPropertiesOfObjectType(type)) {
                     const t = getTypeOfSymbol(p);
-                    if (t.flags & TypeFlags.ContainsUndefinedOrNull) {
+                    if (t.flags & TypeFlags.ContainsWideningType) {
                         if (!reportWideningErrorsInType(t)) {
                             error(p.valueDeclaration, Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
                         }
@@ -7019,7 +7022,7 @@ namespace ts {
         }
 
         function reportErrorsFromWidening(declaration: Declaration, type: Type) {
-            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & TypeFlags.ContainsUndefinedOrNull) {
+            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & TypeFlags.ContainsWideningType) {
                 // Report implicit any error within type if possible, otherwise report error on declaration
                 if (!reportWideningErrorsInType(type)) {
                     reportImplicitAnyError(declaration, type);
@@ -8311,7 +8314,7 @@ namespace ts {
             const classInstanceType = <InterfaceType>getDeclaredTypeOfSymbol(classSymbol);
             const baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
 
-            return baseConstructorType === nullType;
+            return baseConstructorType === nullWideningType;
         }
 
         function checkThisExpression(node: Node): Type {
@@ -9202,7 +9205,7 @@ namespace ts {
                     }
                 }
             }
-            return createArrayType(elementTypes.length ? getUnionType(elementTypes) : emptyArrayElementType);
+            return createArrayType(elementTypes.length ? getUnionType(elementTypes) : strictNullChecks ? neverType : undefinedWideningType);
         }
 
         function isNumericName(name: DeclarationName): boolean {
@@ -12002,7 +12005,7 @@ namespace ts {
 
         function checkVoidExpression(node: VoidExpression): Type {
             checkExpression(node.expression);
-            return undefinedType;
+            return undefinedWideningType;
         }
 
         function checkAwaitExpression(node: AwaitExpression): Type {
@@ -12409,7 +12412,7 @@ namespace ts {
                 case SyntaxKind.InKeyword:
                     return checkInExpression(left, right, leftType, rightType);
                 case SyntaxKind.AmpersandAmpersandToken:
-                    return addNullableKind(rightType, getNullableKind(leftType));
+                    return strictNullChecks ? addNullableKind(rightType, getNullableKind(leftType)) : rightType;
                 case SyntaxKind.BarBarToken:
                     return getUnionType([getNonNullableType(leftType), rightType]);
                 case SyntaxKind.EqualsToken:
@@ -12676,7 +12679,7 @@ namespace ts {
                 case SyntaxKind.SuperKeyword:
                     return checkSuperExpression(node);
                 case SyntaxKind.NullKeyword:
-                    return nullType;
+                    return nullWideningType;
                 case SyntaxKind.TrueKeyword:
                 case SyntaxKind.FalseKeyword:
                     return booleanType;
@@ -12734,7 +12737,7 @@ namespace ts {
                 case SyntaxKind.SpreadElementExpression:
                     return checkSpreadElementExpression(<SpreadElementExpression>node, contextualMapper);
                 case SyntaxKind.OmittedExpression:
-                    return undefinedType;
+                    return undefinedWideningType;
                 case SyntaxKind.YieldExpression:
                     return checkYieldExpression(<YieldExpression>node);
                 case SyntaxKind.JsxExpression:
@@ -17648,7 +17651,7 @@ namespace ts {
             // Setup global builtins
             addToSymbolTable(globals, builtinGlobals, Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
 
-            getSymbolLinks(undefinedSymbol).type = undefinedType;
+            getSymbolLinks(undefinedSymbol).type = undefinedWideningType;
             getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
             getSymbolLinks(unknownSymbol).type = unknownType;
 
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index c7e14a10031..4c0e7a036db 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2197,7 +2197,7 @@ namespace ts {
         /* @internal */
         FreshObjectLiteral      = 0x00100000,  // Fresh object literal type
         /* @internal */
-        ContainsUndefinedOrNull = 0x00200000,  // Type is or contains undefined or null type
+        ContainsWideningType    = 0x00200000,  // Type is or contains undefined or null widening type
         /* @internal */
         ContainsObjectLiteral   = 0x00400000,  // Type is or contains object literal type
         /* @internal */
@@ -2220,9 +2220,9 @@ namespace ts {
         StructuredType = ObjectType | Union | Intersection,
         Narrowable = Any | ObjectType | Union | TypeParameter,
         /* @internal */
-        RequiresWidening = ContainsUndefinedOrNull | ContainsObjectLiteral,
+        RequiresWidening = ContainsWideningType | ContainsObjectLiteral,
         /* @internal */
-        PropagatingFlags = ContainsUndefinedOrNull | ContainsObjectLiteral | ContainsAnyFunctionType
+        PropagatingFlags = ContainsWideningType | ContainsObjectLiteral | ContainsAnyFunctionType
     }
 
     export type DestructuringPattern = BindingPattern | ObjectLiteralExpression | ArrayLiteralExpression;

From 5f3f2d302fbbb5fd95c81534944553221914a342 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 2 Jun 2016 06:47:37 -0700
Subject: [PATCH 151/332] Create separate control flows for property
 declarations with initializers

---
 src/compiler/binder.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 5fdfc7f02be..8c48d984b78 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -1142,6 +1142,8 @@ namespace ts {
 
                 case SyntaxKind.ModuleBlock:
                     return ContainerFlags.IsControlFlowContainer;
+                case SyntaxKind.PropertyDeclaration:
+                    return (<PropertyDeclaration>node).initializer ? ContainerFlags.IsControlFlowContainer : 0;
 
                 case SyntaxKind.CatchClause:
                 case SyntaxKind.ForStatement:

From 706683d51b90ef8b67b52db0e21182c0eaba816d Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 2 Jun 2016 06:54:27 -0700
Subject: [PATCH 152/332] Add regression test

---
 .../controlFlowPropertyDeclarations.js        | 291 +++++++++++++
 .../controlFlowPropertyDeclarations.symbols   | 288 +++++++++++++
 .../controlFlowPropertyDeclarations.types     | 383 ++++++++++++++++++
 .../controlFlowPropertyDeclarations.ts        | 148 +++++++
 4 files changed, 1110 insertions(+)
 create mode 100644 tests/baselines/reference/controlFlowPropertyDeclarations.js
 create mode 100644 tests/baselines/reference/controlFlowPropertyDeclarations.symbols
 create mode 100644 tests/baselines/reference/controlFlowPropertyDeclarations.types
 create mode 100644 tests/cases/compiler/controlFlowPropertyDeclarations.ts

diff --git a/tests/baselines/reference/controlFlowPropertyDeclarations.js b/tests/baselines/reference/controlFlowPropertyDeclarations.js
new file mode 100644
index 00000000000..748f63ea858
--- /dev/null
+++ b/tests/baselines/reference/controlFlowPropertyDeclarations.js
@@ -0,0 +1,291 @@
+//// [controlFlowPropertyDeclarations.ts]
+// Repro from ##8913
+
+declare var require:any;
+
+var HTMLDOMPropertyConfig = require('react/lib/HTMLDOMPropertyConfig');
+
+// Populate property map with ReactJS's attribute and property mappings
+// TODO handle/use .Properties value eg: MUST_USE_PROPERTY is not HTML attr
+for (var propname in HTMLDOMPropertyConfig.Properties) {
+  if (!HTMLDOMPropertyConfig.Properties.hasOwnProperty(propname)) {
+    continue;
+  }
+
+  var mapFrom = HTMLDOMPropertyConfig.DOMAttributeNames[propname] || propname.toLowerCase();
+}
+
+/**
+ * Repeats a string a certain number of times.
+ * Also: the future is bright and consists of native string repetition:
+ * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat
+ *
+ * @param {string} string  String to repeat
+ * @param {number} times   Number of times to repeat string. Integer.
+ * @see http://jsperf.com/string-repeater/2
+ */
+function repeatString(string, times) {
+  if (times === 1) {
+    return string;
+  }
+  if (times < 0) { throw new Error(); }
+  var repeated = '';
+  while (times) {
+    if (times & 1) {
+      repeated += string;
+    }
+    if (times >>= 1) {
+      string += string;
+    }
+  }
+  return repeated;
+}
+
+/**
+ * Determine if the string ends with the specified substring.
+ *
+ * @param {string} haystack String to search in
+ * @param {string} needle   String to search for
+ * @return {boolean}
+ */
+function endsWith(haystack, needle) {
+  return haystack.slice(-needle.length) === needle;
+}
+
+/**
+ * Trim the specified substring off the string. If the string does not end
+ * with the specified substring, this is a no-op.
+ *
+ * @param {string} haystack String to search in
+ * @param {string} needle   String to search for
+ * @return {string}
+ */
+function trimEnd(haystack, needle) {
+  return endsWith(haystack, needle)
+    ? haystack.slice(0, -needle.length)
+    : haystack;
+}
+
+/**
+ * Convert a hyphenated string to camelCase.
+ */
+function hyphenToCamelCase(string) {
+  return string.replace(/-(.)/g, function(match, chr) {
+    return chr.toUpperCase();
+  });
+}
+
+/**
+ * Determines if the specified string consists entirely of whitespace.
+ */
+function isEmpty(string) {
+   return !/[^\s]/.test(string);
+}
+
+/**
+ * Determines if the CSS value can be converted from a
+ * 'px' suffixed string to a numeric value
+ *
+ * @param {string} value CSS property value
+ * @return {boolean}
+ */
+function isConvertiblePixelValue(value) {
+  return /^\d+px$/.test(value);
+}
+
+export class HTMLtoJSX {
+    private output: string;
+    private level: number;
+    private _inPreTag: boolean;
+
+
+  /**
+   * Handles processing of the specified text node
+   *
+   * @param {TextNode} node
+   */
+  _visitText = (node) => {
+    var parentTag = node.parentNode && node.parentNode.tagName.toLowerCase();
+    if (parentTag === 'textarea' || parentTag === 'style') {
+      // Ignore text content of textareas and styles, as it will have already been moved
+      // to a "defaultValue" attribute and "dangerouslySetInnerHTML" attribute respectively.
+      return;
+    }
+
+    var text = ''
+
+    if (this._inPreTag) {
+      // If this text is contained within a <pre>, we need to ensure the JSX
+      // whitespace coalescing rules don't eat the whitespace. This means
+      // wrapping newlines and sequences of two or more spaces in variables.
+      text = text
+        .replace(/\r/g, '')
+        .replace(/( {2,}|\n|\t|\{|\})/g, function(whitespace) {
+          return '{' + JSON.stringify(whitespace) + '}';
+        });
+    } else {
+      // If there's a newline in the text, adjust the indent level
+      if (text.indexOf('\n') > -1) {
+      }
+    }
+    this.output += text;
+  }
+
+
+
+};
+
+/**
+ * Handles parsing of inline styles
+ */
+export class StyleParser {
+  styles = {};
+  toJSXString = () => {
+    for (var key in this.styles) {
+      if (!this.styles.hasOwnProperty(key)) {
+      }
+    }
+  }
+}
+
+//// [controlFlowPropertyDeclarations.js]
+// Repro from ##8913
+"use strict";
+var HTMLDOMPropertyConfig = require('react/lib/HTMLDOMPropertyConfig');
+// Populate property map with ReactJS's attribute and property mappings
+// TODO handle/use .Properties value eg: MUST_USE_PROPERTY is not HTML attr
+for (var propname in HTMLDOMPropertyConfig.Properties) {
+    if (!HTMLDOMPropertyConfig.Properties.hasOwnProperty(propname)) {
+        continue;
+    }
+    var mapFrom = HTMLDOMPropertyConfig.DOMAttributeNames[propname] || propname.toLowerCase();
+}
+/**
+ * Repeats a string a certain number of times.
+ * Also: the future is bright and consists of native string repetition:
+ * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat
+ *
+ * @param {string} string  String to repeat
+ * @param {number} times   Number of times to repeat string. Integer.
+ * @see http://jsperf.com/string-repeater/2
+ */
+function repeatString(string, times) {
+    if (times === 1) {
+        return string;
+    }
+    if (times < 0) {
+        throw new Error();
+    }
+    var repeated = '';
+    while (times) {
+        if (times & 1) {
+            repeated += string;
+        }
+        if (times >>= 1) {
+            string += string;
+        }
+    }
+    return repeated;
+}
+/**
+ * Determine if the string ends with the specified substring.
+ *
+ * @param {string} haystack String to search in
+ * @param {string} needle   String to search for
+ * @return {boolean}
+ */
+function endsWith(haystack, needle) {
+    return haystack.slice(-needle.length) === needle;
+}
+/**
+ * Trim the specified substring off the string. If the string does not end
+ * with the specified substring, this is a no-op.
+ *
+ * @param {string} haystack String to search in
+ * @param {string} needle   String to search for
+ * @return {string}
+ */
+function trimEnd(haystack, needle) {
+    return endsWith(haystack, needle)
+        ? haystack.slice(0, -needle.length)
+        : haystack;
+}
+/**
+ * Convert a hyphenated string to camelCase.
+ */
+function hyphenToCamelCase(string) {
+    return string.replace(/-(.)/g, function (match, chr) {
+        return chr.toUpperCase();
+    });
+}
+/**
+ * Determines if the specified string consists entirely of whitespace.
+ */
+function isEmpty(string) {
+    return !/[^\s]/.test(string);
+}
+/**
+ * Determines if the CSS value can be converted from a
+ * 'px' suffixed string to a numeric value
+ *
+ * @param {string} value CSS property value
+ * @return {boolean}
+ */
+function isConvertiblePixelValue(value) {
+    return /^\d+px$/.test(value);
+}
+var HTMLtoJSX = (function () {
+    function HTMLtoJSX() {
+        var _this = this;
+        /**
+         * Handles processing of the specified text node
+         *
+         * @param {TextNode} node
+         */
+        this._visitText = function (node) {
+            var parentTag = node.parentNode && node.parentNode.tagName.toLowerCase();
+            if (parentTag === 'textarea' || parentTag === 'style') {
+                // Ignore text content of textareas and styles, as it will have already been moved
+                // to a "defaultValue" attribute and "dangerouslySetInnerHTML" attribute respectively.
+                return;
+            }
+            var text = '';
+            if (_this._inPreTag) {
+                // If this text is contained within a <pre>, we need to ensure the JSX
+                // whitespace coalescing rules don't eat the whitespace. This means
+                // wrapping newlines and sequences of two or more spaces in variables.
+                text = text
+                    .replace(/\r/g, '')
+                    .replace(/( {2,}|\n|\t|\{|\})/g, function (whitespace) {
+                    return '{' + JSON.stringify(whitespace) + '}';
+                });
+            }
+            else {
+                // If there's a newline in the text, adjust the indent level
+                if (text.indexOf('\n') > -1) {
+                }
+            }
+            _this.output += text;
+        };
+    }
+    return HTMLtoJSX;
+}());
+exports.HTMLtoJSX = HTMLtoJSX;
+;
+/**
+ * Handles parsing of inline styles
+ */
+var StyleParser = (function () {
+    function StyleParser() {
+        var _this = this;
+        this.styles = {};
+        this.toJSXString = function () {
+            for (var key in _this.styles) {
+                if (!_this.styles.hasOwnProperty(key)) {
+                }
+            }
+        };
+    }
+    return StyleParser;
+}());
+exports.StyleParser = StyleParser;
diff --git a/tests/baselines/reference/controlFlowPropertyDeclarations.symbols b/tests/baselines/reference/controlFlowPropertyDeclarations.symbols
new file mode 100644
index 00000000000..8e87d71ae33
--- /dev/null
+++ b/tests/baselines/reference/controlFlowPropertyDeclarations.symbols
@@ -0,0 +1,288 @@
+=== tests/cases/compiler/controlFlowPropertyDeclarations.ts ===
+// Repro from ##8913
+
+declare var require:any;
+>require : Symbol(require, Decl(controlFlowPropertyDeclarations.ts, 2, 11))
+
+var HTMLDOMPropertyConfig = require('react/lib/HTMLDOMPropertyConfig');
+>HTMLDOMPropertyConfig : Symbol(HTMLDOMPropertyConfig, Decl(controlFlowPropertyDeclarations.ts, 4, 3))
+>require : Symbol(require, Decl(controlFlowPropertyDeclarations.ts, 2, 11))
+
+// Populate property map with ReactJS's attribute and property mappings
+// TODO handle/use .Properties value eg: MUST_USE_PROPERTY is not HTML attr
+for (var propname in HTMLDOMPropertyConfig.Properties) {
+>propname : Symbol(propname, Decl(controlFlowPropertyDeclarations.ts, 8, 8))
+>HTMLDOMPropertyConfig : Symbol(HTMLDOMPropertyConfig, Decl(controlFlowPropertyDeclarations.ts, 4, 3))
+
+  if (!HTMLDOMPropertyConfig.Properties.hasOwnProperty(propname)) {
+>HTMLDOMPropertyConfig : Symbol(HTMLDOMPropertyConfig, Decl(controlFlowPropertyDeclarations.ts, 4, 3))
+>propname : Symbol(propname, Decl(controlFlowPropertyDeclarations.ts, 8, 8))
+
+    continue;
+  }
+
+  var mapFrom = HTMLDOMPropertyConfig.DOMAttributeNames[propname] || propname.toLowerCase();
+>mapFrom : Symbol(mapFrom, Decl(controlFlowPropertyDeclarations.ts, 13, 5))
+>HTMLDOMPropertyConfig : Symbol(HTMLDOMPropertyConfig, Decl(controlFlowPropertyDeclarations.ts, 4, 3))
+>propname : Symbol(propname, Decl(controlFlowPropertyDeclarations.ts, 8, 8))
+>propname.toLowerCase : Symbol(String.toLowerCase, Decl(lib.d.ts, --, --))
+>propname : Symbol(propname, Decl(controlFlowPropertyDeclarations.ts, 8, 8))
+>toLowerCase : Symbol(String.toLowerCase, Decl(lib.d.ts, --, --))
+}
+
+/**
+ * Repeats a string a certain number of times.
+ * Also: the future is bright and consists of native string repetition:
+ * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat
+ *
+ * @param {string} string  String to repeat
+ * @param {number} times   Number of times to repeat string. Integer.
+ * @see http://jsperf.com/string-repeater/2
+ */
+function repeatString(string, times) {
+>repeatString : Symbol(repeatString, Decl(controlFlowPropertyDeclarations.ts, 14, 1))
+>string : Symbol(string, Decl(controlFlowPropertyDeclarations.ts, 25, 22))
+>times : Symbol(times, Decl(controlFlowPropertyDeclarations.ts, 25, 29))
+
+  if (times === 1) {
+>times : Symbol(times, Decl(controlFlowPropertyDeclarations.ts, 25, 29))
+
+    return string;
+>string : Symbol(string, Decl(controlFlowPropertyDeclarations.ts, 25, 22))
+  }
+  if (times < 0) { throw new Error(); }
+>times : Symbol(times, Decl(controlFlowPropertyDeclarations.ts, 25, 29))
+>Error : Symbol(Error, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+
+  var repeated = '';
+>repeated : Symbol(repeated, Decl(controlFlowPropertyDeclarations.ts, 30, 5))
+
+  while (times) {
+>times : Symbol(times, Decl(controlFlowPropertyDeclarations.ts, 25, 29))
+
+    if (times & 1) {
+>times : Symbol(times, Decl(controlFlowPropertyDeclarations.ts, 25, 29))
+
+      repeated += string;
+>repeated : Symbol(repeated, Decl(controlFlowPropertyDeclarations.ts, 30, 5))
+>string : Symbol(string, Decl(controlFlowPropertyDeclarations.ts, 25, 22))
+    }
+    if (times >>= 1) {
+>times : Symbol(times, Decl(controlFlowPropertyDeclarations.ts, 25, 29))
+
+      string += string;
+>string : Symbol(string, Decl(controlFlowPropertyDeclarations.ts, 25, 22))
+>string : Symbol(string, Decl(controlFlowPropertyDeclarations.ts, 25, 22))
+    }
+  }
+  return repeated;
+>repeated : Symbol(repeated, Decl(controlFlowPropertyDeclarations.ts, 30, 5))
+}
+
+/**
+ * Determine if the string ends with the specified substring.
+ *
+ * @param {string} haystack String to search in
+ * @param {string} needle   String to search for
+ * @return {boolean}
+ */
+function endsWith(haystack, needle) {
+>endsWith : Symbol(endsWith, Decl(controlFlowPropertyDeclarations.ts, 40, 1))
+>haystack : Symbol(haystack, Decl(controlFlowPropertyDeclarations.ts, 49, 18))
+>needle : Symbol(needle, Decl(controlFlowPropertyDeclarations.ts, 49, 27))
+
+  return haystack.slice(-needle.length) === needle;
+>haystack : Symbol(haystack, Decl(controlFlowPropertyDeclarations.ts, 49, 18))
+>needle : Symbol(needle, Decl(controlFlowPropertyDeclarations.ts, 49, 27))
+>needle : Symbol(needle, Decl(controlFlowPropertyDeclarations.ts, 49, 27))
+}
+
+/**
+ * Trim the specified substring off the string. If the string does not end
+ * with the specified substring, this is a no-op.
+ *
+ * @param {string} haystack String to search in
+ * @param {string} needle   String to search for
+ * @return {string}
+ */
+function trimEnd(haystack, needle) {
+>trimEnd : Symbol(trimEnd, Decl(controlFlowPropertyDeclarations.ts, 51, 1))
+>haystack : Symbol(haystack, Decl(controlFlowPropertyDeclarations.ts, 61, 17))
+>needle : Symbol(needle, Decl(controlFlowPropertyDeclarations.ts, 61, 26))
+
+  return endsWith(haystack, needle)
+>endsWith : Symbol(endsWith, Decl(controlFlowPropertyDeclarations.ts, 40, 1))
+>haystack : Symbol(haystack, Decl(controlFlowPropertyDeclarations.ts, 61, 17))
+>needle : Symbol(needle, Decl(controlFlowPropertyDeclarations.ts, 61, 26))
+
+    ? haystack.slice(0, -needle.length)
+>haystack : Symbol(haystack, Decl(controlFlowPropertyDeclarations.ts, 61, 17))
+>needle : Symbol(needle, Decl(controlFlowPropertyDeclarations.ts, 61, 26))
+
+    : haystack;
+>haystack : Symbol(haystack, Decl(controlFlowPropertyDeclarations.ts, 61, 17))
+}
+
+/**
+ * Convert a hyphenated string to camelCase.
+ */
+function hyphenToCamelCase(string) {
+>hyphenToCamelCase : Symbol(hyphenToCamelCase, Decl(controlFlowPropertyDeclarations.ts, 65, 1))
+>string : Symbol(string, Decl(controlFlowPropertyDeclarations.ts, 70, 27))
+
+  return string.replace(/-(.)/g, function(match, chr) {
+>string : Symbol(string, Decl(controlFlowPropertyDeclarations.ts, 70, 27))
+>match : Symbol(match, Decl(controlFlowPropertyDeclarations.ts, 71, 42))
+>chr : Symbol(chr, Decl(controlFlowPropertyDeclarations.ts, 71, 48))
+
+    return chr.toUpperCase();
+>chr : Symbol(chr, Decl(controlFlowPropertyDeclarations.ts, 71, 48))
+
+  });
+}
+
+/**
+ * Determines if the specified string consists entirely of whitespace.
+ */
+function isEmpty(string) {
+>isEmpty : Symbol(isEmpty, Decl(controlFlowPropertyDeclarations.ts, 74, 1))
+>string : Symbol(string, Decl(controlFlowPropertyDeclarations.ts, 79, 17))
+
+   return !/[^\s]/.test(string);
+>/[^\s]/.test : Symbol(RegExp.test, Decl(lib.d.ts, --, --))
+>test : Symbol(RegExp.test, Decl(lib.d.ts, --, --))
+>string : Symbol(string, Decl(controlFlowPropertyDeclarations.ts, 79, 17))
+}
+
+/**
+ * Determines if the CSS value can be converted from a
+ * 'px' suffixed string to a numeric value
+ *
+ * @param {string} value CSS property value
+ * @return {boolean}
+ */
+function isConvertiblePixelValue(value) {
+>isConvertiblePixelValue : Symbol(isConvertiblePixelValue, Decl(controlFlowPropertyDeclarations.ts, 81, 1))
+>value : Symbol(value, Decl(controlFlowPropertyDeclarations.ts, 90, 33))
+
+  return /^\d+px$/.test(value);
+>/^\d+px$/.test : Symbol(RegExp.test, Decl(lib.d.ts, --, --))
+>test : Symbol(RegExp.test, Decl(lib.d.ts, --, --))
+>value : Symbol(value, Decl(controlFlowPropertyDeclarations.ts, 90, 33))
+}
+
+export class HTMLtoJSX {
+>HTMLtoJSX : Symbol(HTMLtoJSX, Decl(controlFlowPropertyDeclarations.ts, 92, 1))
+
+    private output: string;
+>output : Symbol(HTMLtoJSX.output, Decl(controlFlowPropertyDeclarations.ts, 94, 24))
+
+    private level: number;
+>level : Symbol(HTMLtoJSX.level, Decl(controlFlowPropertyDeclarations.ts, 95, 27))
+
+    private _inPreTag: boolean;
+>_inPreTag : Symbol(HTMLtoJSX._inPreTag, Decl(controlFlowPropertyDeclarations.ts, 96, 26))
+
+
+  /**
+   * Handles processing of the specified text node
+   *
+   * @param {TextNode} node
+   */
+  _visitText = (node) => {
+>_visitText : Symbol(HTMLtoJSX._visitText, Decl(controlFlowPropertyDeclarations.ts, 97, 31))
+>node : Symbol(node, Decl(controlFlowPropertyDeclarations.ts, 105, 16))
+
+    var parentTag = node.parentNode && node.parentNode.tagName.toLowerCase();
+>parentTag : Symbol(parentTag, Decl(controlFlowPropertyDeclarations.ts, 106, 7))
+>node : Symbol(node, Decl(controlFlowPropertyDeclarations.ts, 105, 16))
+>node : Symbol(node, Decl(controlFlowPropertyDeclarations.ts, 105, 16))
+
+    if (parentTag === 'textarea' || parentTag === 'style') {
+>parentTag : Symbol(parentTag, Decl(controlFlowPropertyDeclarations.ts, 106, 7))
+>parentTag : Symbol(parentTag, Decl(controlFlowPropertyDeclarations.ts, 106, 7))
+
+      // Ignore text content of textareas and styles, as it will have already been moved
+      // to a "defaultValue" attribute and "dangerouslySetInnerHTML" attribute respectively.
+      return;
+    }
+
+    var text = ''
+>text : Symbol(text, Decl(controlFlowPropertyDeclarations.ts, 113, 7))
+
+    if (this._inPreTag) {
+>this._inPreTag : Symbol(HTMLtoJSX._inPreTag, Decl(controlFlowPropertyDeclarations.ts, 96, 26))
+>this : Symbol(HTMLtoJSX, Decl(controlFlowPropertyDeclarations.ts, 92, 1))
+>_inPreTag : Symbol(HTMLtoJSX._inPreTag, Decl(controlFlowPropertyDeclarations.ts, 96, 26))
+
+      // If this text is contained within a <pre>, we need to ensure the JSX
+      // whitespace coalescing rules don't eat the whitespace. This means
+      // wrapping newlines and sequences of two or more spaces in variables.
+      text = text
+>text : Symbol(text, Decl(controlFlowPropertyDeclarations.ts, 113, 7))
+>text        .replace(/\r/g, '')        .replace : Symbol(String.replace, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>text        .replace : Symbol(String.replace, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>text : Symbol(text, Decl(controlFlowPropertyDeclarations.ts, 113, 7))
+
+        .replace(/\r/g, '')
+>replace : Symbol(String.replace, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+
+        .replace(/( {2,}|\n|\t|\{|\})/g, function(whitespace) {
+>replace : Symbol(String.replace, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>whitespace : Symbol(whitespace, Decl(controlFlowPropertyDeclarations.ts, 121, 50))
+
+          return '{' + JSON.stringify(whitespace) + '}';
+>JSON.stringify : Symbol(JSON.stringify, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>JSON : Symbol(JSON, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>stringify : Symbol(JSON.stringify, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>whitespace : Symbol(whitespace, Decl(controlFlowPropertyDeclarations.ts, 121, 50))
+
+        });
+    } else {
+      // If there's a newline in the text, adjust the indent level
+      if (text.indexOf('\n') > -1) {
+>text.indexOf : Symbol(String.indexOf, Decl(lib.d.ts, --, --))
+>text : Symbol(text, Decl(controlFlowPropertyDeclarations.ts, 113, 7))
+>indexOf : Symbol(String.indexOf, Decl(lib.d.ts, --, --))
+      }
+    }
+    this.output += text;
+>this.output : Symbol(HTMLtoJSX.output, Decl(controlFlowPropertyDeclarations.ts, 94, 24))
+>this : Symbol(HTMLtoJSX, Decl(controlFlowPropertyDeclarations.ts, 92, 1))
+>output : Symbol(HTMLtoJSX.output, Decl(controlFlowPropertyDeclarations.ts, 94, 24))
+>text : Symbol(text, Decl(controlFlowPropertyDeclarations.ts, 113, 7))
+  }
+
+
+
+};
+
+/**
+ * Handles parsing of inline styles
+ */
+export class StyleParser {
+>StyleParser : Symbol(StyleParser, Decl(controlFlowPropertyDeclarations.ts, 134, 2))
+
+  styles = {};
+>styles : Symbol(StyleParser.styles, Decl(controlFlowPropertyDeclarations.ts, 139, 26))
+
+  toJSXString = () => {
+>toJSXString : Symbol(StyleParser.toJSXString, Decl(controlFlowPropertyDeclarations.ts, 140, 14))
+
+    for (var key in this.styles) {
+>key : Symbol(key, Decl(controlFlowPropertyDeclarations.ts, 142, 12))
+>this.styles : Symbol(StyleParser.styles, Decl(controlFlowPropertyDeclarations.ts, 139, 26))
+>this : Symbol(StyleParser, Decl(controlFlowPropertyDeclarations.ts, 134, 2))
+>styles : Symbol(StyleParser.styles, Decl(controlFlowPropertyDeclarations.ts, 139, 26))
+
+      if (!this.styles.hasOwnProperty(key)) {
+>this.styles.hasOwnProperty : Symbol(Object.hasOwnProperty, Decl(lib.d.ts, --, --))
+>this.styles : Symbol(StyleParser.styles, Decl(controlFlowPropertyDeclarations.ts, 139, 26))
+>this : Symbol(StyleParser, Decl(controlFlowPropertyDeclarations.ts, 134, 2))
+>styles : Symbol(StyleParser.styles, Decl(controlFlowPropertyDeclarations.ts, 139, 26))
+>hasOwnProperty : Symbol(Object.hasOwnProperty, Decl(lib.d.ts, --, --))
+>key : Symbol(key, Decl(controlFlowPropertyDeclarations.ts, 142, 12))
+      }
+    }
+  }
+}
diff --git a/tests/baselines/reference/controlFlowPropertyDeclarations.types b/tests/baselines/reference/controlFlowPropertyDeclarations.types
new file mode 100644
index 00000000000..81c86e8625d
--- /dev/null
+++ b/tests/baselines/reference/controlFlowPropertyDeclarations.types
@@ -0,0 +1,383 @@
+=== tests/cases/compiler/controlFlowPropertyDeclarations.ts ===
+// Repro from ##8913
+
+declare var require:any;
+>require : any
+
+var HTMLDOMPropertyConfig = require('react/lib/HTMLDOMPropertyConfig');
+>HTMLDOMPropertyConfig : any
+>require('react/lib/HTMLDOMPropertyConfig') : any
+>require : any
+>'react/lib/HTMLDOMPropertyConfig' : string
+
+// Populate property map with ReactJS's attribute and property mappings
+// TODO handle/use .Properties value eg: MUST_USE_PROPERTY is not HTML attr
+for (var propname in HTMLDOMPropertyConfig.Properties) {
+>propname : string
+>HTMLDOMPropertyConfig.Properties : any
+>HTMLDOMPropertyConfig : any
+>Properties : any
+
+  if (!HTMLDOMPropertyConfig.Properties.hasOwnProperty(propname)) {
+>!HTMLDOMPropertyConfig.Properties.hasOwnProperty(propname) : boolean
+>HTMLDOMPropertyConfig.Properties.hasOwnProperty(propname) : any
+>HTMLDOMPropertyConfig.Properties.hasOwnProperty : any
+>HTMLDOMPropertyConfig.Properties : any
+>HTMLDOMPropertyConfig : any
+>Properties : any
+>hasOwnProperty : any
+>propname : string
+
+    continue;
+  }
+
+  var mapFrom = HTMLDOMPropertyConfig.DOMAttributeNames[propname] || propname.toLowerCase();
+>mapFrom : any
+>HTMLDOMPropertyConfig.DOMAttributeNames[propname] || propname.toLowerCase() : any
+>HTMLDOMPropertyConfig.DOMAttributeNames[propname] : any
+>HTMLDOMPropertyConfig.DOMAttributeNames : any
+>HTMLDOMPropertyConfig : any
+>DOMAttributeNames : any
+>propname : string
+>propname.toLowerCase() : string
+>propname.toLowerCase : () => string
+>propname : string
+>toLowerCase : () => string
+}
+
+/**
+ * Repeats a string a certain number of times.
+ * Also: the future is bright and consists of native string repetition:
+ * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat
+ *
+ * @param {string} string  String to repeat
+ * @param {number} times   Number of times to repeat string. Integer.
+ * @see http://jsperf.com/string-repeater/2
+ */
+function repeatString(string, times) {
+>repeatString : (string: any, times: any) => any
+>string : any
+>times : any
+
+  if (times === 1) {
+>times === 1 : boolean
+>times : any
+>1 : number
+
+    return string;
+>string : any
+  }
+  if (times < 0) { throw new Error(); }
+>times < 0 : boolean
+>times : any
+>0 : number
+>new Error() : Error
+>Error : ErrorConstructor
+
+  var repeated = '';
+>repeated : string
+>'' : string
+
+  while (times) {
+>times : any
+
+    if (times & 1) {
+>times & 1 : number
+>times : any
+>1 : number
+
+      repeated += string;
+>repeated += string : string
+>repeated : string
+>string : any
+    }
+    if (times >>= 1) {
+>times >>= 1 : number
+>times : any
+>1 : number
+
+      string += string;
+>string += string : any
+>string : any
+>string : any
+    }
+  }
+  return repeated;
+>repeated : string
+}
+
+/**
+ * Determine if the string ends with the specified substring.
+ *
+ * @param {string} haystack String to search in
+ * @param {string} needle   String to search for
+ * @return {boolean}
+ */
+function endsWith(haystack, needle) {
+>endsWith : (haystack: any, needle: any) => boolean
+>haystack : any
+>needle : any
+
+  return haystack.slice(-needle.length) === needle;
+>haystack.slice(-needle.length) === needle : boolean
+>haystack.slice(-needle.length) : any
+>haystack.slice : any
+>haystack : any
+>slice : any
+>-needle.length : number
+>needle.length : any
+>needle : any
+>length : any
+>needle : any
+}
+
+/**
+ * Trim the specified substring off the string. If the string does not end
+ * with the specified substring, this is a no-op.
+ *
+ * @param {string} haystack String to search in
+ * @param {string} needle   String to search for
+ * @return {string}
+ */
+function trimEnd(haystack, needle) {
+>trimEnd : (haystack: any, needle: any) => any
+>haystack : any
+>needle : any
+
+  return endsWith(haystack, needle)
+>endsWith(haystack, needle)    ? haystack.slice(0, -needle.length)    : haystack : any
+>endsWith(haystack, needle) : boolean
+>endsWith : (haystack: any, needle: any) => boolean
+>haystack : any
+>needle : any
+
+    ? haystack.slice(0, -needle.length)
+>haystack.slice(0, -needle.length) : any
+>haystack.slice : any
+>haystack : any
+>slice : any
+>0 : number
+>-needle.length : number
+>needle.length : any
+>needle : any
+>length : any
+
+    : haystack;
+>haystack : any
+}
+
+/**
+ * Convert a hyphenated string to camelCase.
+ */
+function hyphenToCamelCase(string) {
+>hyphenToCamelCase : (string: any) => any
+>string : any
+
+  return string.replace(/-(.)/g, function(match, chr) {
+>string.replace(/-(.)/g, function(match, chr) {    return chr.toUpperCase();  }) : any
+>string.replace : any
+>string : any
+>replace : any
+>/-(.)/g : RegExp
+>function(match, chr) {    return chr.toUpperCase();  } : (match: any, chr: any) => any
+>match : any
+>chr : any
+
+    return chr.toUpperCase();
+>chr.toUpperCase() : any
+>chr.toUpperCase : any
+>chr : any
+>toUpperCase : any
+
+  });
+}
+
+/**
+ * Determines if the specified string consists entirely of whitespace.
+ */
+function isEmpty(string) {
+>isEmpty : (string: any) => boolean
+>string : any
+
+   return !/[^\s]/.test(string);
+>!/[^\s]/.test(string) : boolean
+>/[^\s]/.test(string) : boolean
+>/[^\s]/.test : (string: string) => boolean
+>/[^\s]/ : RegExp
+>test : (string: string) => boolean
+>string : any
+}
+
+/**
+ * Determines if the CSS value can be converted from a
+ * 'px' suffixed string to a numeric value
+ *
+ * @param {string} value CSS property value
+ * @return {boolean}
+ */
+function isConvertiblePixelValue(value) {
+>isConvertiblePixelValue : (value: any) => boolean
+>value : any
+
+  return /^\d+px$/.test(value);
+>/^\d+px$/.test(value) : boolean
+>/^\d+px$/.test : (string: string) => boolean
+>/^\d+px$/ : RegExp
+>test : (string: string) => boolean
+>value : any
+}
+
+export class HTMLtoJSX {
+>HTMLtoJSX : HTMLtoJSX
+
+    private output: string;
+>output : string
+
+    private level: number;
+>level : number
+
+    private _inPreTag: boolean;
+>_inPreTag : boolean
+
+
+  /**
+   * Handles processing of the specified text node
+   *
+   * @param {TextNode} node
+   */
+  _visitText = (node) => {
+>_visitText : (node: any) => void
+>(node) => {    var parentTag = node.parentNode && node.parentNode.tagName.toLowerCase();    if (parentTag === 'textarea' || parentTag === 'style') {      // Ignore text content of textareas and styles, as it will have already been moved      // to a "defaultValue" attribute and "dangerouslySetInnerHTML" attribute respectively.      return;    }    var text = ''    if (this._inPreTag) {      // If this text is contained within a <pre>, we need to ensure the JSX      // whitespace coalescing rules don't eat the whitespace. This means      // wrapping newlines and sequences of two or more spaces in variables.      text = text        .replace(/\r/g, '')        .replace(/( {2,}|\n|\t|\{|\})/g, function(whitespace) {          return '{' + JSON.stringify(whitespace) + '}';        });    } else {      // If there's a newline in the text, adjust the indent level      if (text.indexOf('\n') > -1) {      }    }    this.output += text;  } : (node: any) => void
+>node : any
+
+    var parentTag = node.parentNode && node.parentNode.tagName.toLowerCase();
+>parentTag : any
+>node.parentNode && node.parentNode.tagName.toLowerCase() : any
+>node.parentNode : any
+>node : any
+>parentNode : any
+>node.parentNode.tagName.toLowerCase() : any
+>node.parentNode.tagName.toLowerCase : any
+>node.parentNode.tagName : any
+>node.parentNode : any
+>node : any
+>parentNode : any
+>tagName : any
+>toLowerCase : any
+
+    if (parentTag === 'textarea' || parentTag === 'style') {
+>parentTag === 'textarea' || parentTag === 'style' : boolean
+>parentTag === 'textarea' : boolean
+>parentTag : any
+>'textarea' : string
+>parentTag === 'style' : boolean
+>parentTag : any
+>'style' : string
+
+      // Ignore text content of textareas and styles, as it will have already been moved
+      // to a "defaultValue" attribute and "dangerouslySetInnerHTML" attribute respectively.
+      return;
+    }
+
+    var text = ''
+>text : string
+>'' : string
+
+    if (this._inPreTag) {
+>this._inPreTag : boolean
+>this : this
+>_inPreTag : boolean
+
+      // If this text is contained within a <pre>, we need to ensure the JSX
+      // whitespace coalescing rules don't eat the whitespace. This means
+      // wrapping newlines and sequences of two or more spaces in variables.
+      text = text
+>text = text        .replace(/\r/g, '')        .replace(/( {2,}|\n|\t|\{|\})/g, function(whitespace) {          return '{' + JSON.stringify(whitespace) + '}';        }) : string
+>text : string
+>text        .replace(/\r/g, '')        .replace(/( {2,}|\n|\t|\{|\})/g, function(whitespace) {          return '{' + JSON.stringify(whitespace) + '}';        }) : string
+>text        .replace(/\r/g, '')        .replace : { (searchValue: string, replaceValue: string): string; (searchValue: string, replacer: (substring: string, ...args: any[]) => string): string; (searchValue: RegExp, replaceValue: string): string; (searchValue: RegExp, replacer: (substring: string, ...args: any[]) => string): string; }
+>text        .replace(/\r/g, '') : string
+>text        .replace : { (searchValue: string, replaceValue: string): string; (searchValue: string, replacer: (substring: string, ...args: any[]) => string): string; (searchValue: RegExp, replaceValue: string): string; (searchValue: RegExp, replacer: (substring: string, ...args: any[]) => string): string; }
+>text : string
+
+        .replace(/\r/g, '')
+>replace : { (searchValue: string, replaceValue: string): string; (searchValue: string, replacer: (substring: string, ...args: any[]) => string): string; (searchValue: RegExp, replaceValue: string): string; (searchValue: RegExp, replacer: (substring: string, ...args: any[]) => string): string; }
+>/\r/g : RegExp
+>'' : string
+
+        .replace(/( {2,}|\n|\t|\{|\})/g, function(whitespace) {
+>replace : { (searchValue: string, replaceValue: string): string; (searchValue: string, replacer: (substring: string, ...args: any[]) => string): string; (searchValue: RegExp, replaceValue: string): string; (searchValue: RegExp, replacer: (substring: string, ...args: any[]) => string): string; }
+>/( {2,}|\n|\t|\{|\})/g : RegExp
+>function(whitespace) {          return '{' + JSON.stringify(whitespace) + '}';        } : (whitespace: string) => string
+>whitespace : string
+
+          return '{' + JSON.stringify(whitespace) + '}';
+>'{' + JSON.stringify(whitespace) + '}' : string
+>'{' + JSON.stringify(whitespace) : string
+>'{' : string
+>JSON.stringify(whitespace) : string
+>JSON.stringify : { (value: any, replacer?: (key: string, value: any) => any, space?: string | number): string; (value: any, replacer?: (number | string)[], space?: string | number): string; }
+>JSON : JSON
+>stringify : { (value: any, replacer?: (key: string, value: any) => any, space?: string | number): string; (value: any, replacer?: (number | string)[], space?: string | number): string; }
+>whitespace : string
+>'}' : string
+
+        });
+    } else {
+      // If there's a newline in the text, adjust the indent level
+      if (text.indexOf('\n') > -1) {
+>text.indexOf('\n') > -1 : boolean
+>text.indexOf('\n') : number
+>text.indexOf : (searchString: string, position?: number) => number
+>text : string
+>indexOf : (searchString: string, position?: number) => number
+>'\n' : string
+>-1 : number
+>1 : number
+      }
+    }
+    this.output += text;
+>this.output += text : string
+>this.output : string
+>this : this
+>output : string
+>text : string
+  }
+
+
+
+};
+
+/**
+ * Handles parsing of inline styles
+ */
+export class StyleParser {
+>StyleParser : StyleParser
+
+  styles = {};
+>styles : {}
+>{} : {}
+
+  toJSXString = () => {
+>toJSXString : () => void
+>() => {    for (var key in this.styles) {      if (!this.styles.hasOwnProperty(key)) {      }    }  } : () => void
+
+    for (var key in this.styles) {
+>key : string
+>this.styles : {}
+>this : this
+>styles : {}
+
+      if (!this.styles.hasOwnProperty(key)) {
+>!this.styles.hasOwnProperty(key) : boolean
+>this.styles.hasOwnProperty(key) : boolean
+>this.styles.hasOwnProperty : (v: string) => boolean
+>this.styles : {}
+>this : this
+>styles : {}
+>hasOwnProperty : (v: string) => boolean
+>key : string
+      }
+    }
+  }
+}
diff --git a/tests/cases/compiler/controlFlowPropertyDeclarations.ts b/tests/cases/compiler/controlFlowPropertyDeclarations.ts
new file mode 100644
index 00000000000..5a5e9fb96bf
--- /dev/null
+++ b/tests/cases/compiler/controlFlowPropertyDeclarations.ts
@@ -0,0 +1,148 @@
+// Repro from ##8913
+
+declare var require:any;
+
+var HTMLDOMPropertyConfig = require('react/lib/HTMLDOMPropertyConfig');
+
+// Populate property map with ReactJS's attribute and property mappings
+// TODO handle/use .Properties value eg: MUST_USE_PROPERTY is not HTML attr
+for (var propname in HTMLDOMPropertyConfig.Properties) {
+  if (!HTMLDOMPropertyConfig.Properties.hasOwnProperty(propname)) {
+    continue;
+  }
+
+  var mapFrom = HTMLDOMPropertyConfig.DOMAttributeNames[propname] || propname.toLowerCase();
+}
+
+/**
+ * Repeats a string a certain number of times.
+ * Also: the future is bright and consists of native string repetition:
+ * https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/repeat
+ *
+ * @param {string} string  String to repeat
+ * @param {number} times   Number of times to repeat string. Integer.
+ * @see http://jsperf.com/string-repeater/2
+ */
+function repeatString(string, times) {
+  if (times === 1) {
+    return string;
+  }
+  if (times < 0) { throw new Error(); }
+  var repeated = '';
+  while (times) {
+    if (times & 1) {
+      repeated += string;
+    }
+    if (times >>= 1) {
+      string += string;
+    }
+  }
+  return repeated;
+}
+
+/**
+ * Determine if the string ends with the specified substring.
+ *
+ * @param {string} haystack String to search in
+ * @param {string} needle   String to search for
+ * @return {boolean}
+ */
+function endsWith(haystack, needle) {
+  return haystack.slice(-needle.length) === needle;
+}
+
+/**
+ * Trim the specified substring off the string. If the string does not end
+ * with the specified substring, this is a no-op.
+ *
+ * @param {string} haystack String to search in
+ * @param {string} needle   String to search for
+ * @return {string}
+ */
+function trimEnd(haystack, needle) {
+  return endsWith(haystack, needle)
+    ? haystack.slice(0, -needle.length)
+    : haystack;
+}
+
+/**
+ * Convert a hyphenated string to camelCase.
+ */
+function hyphenToCamelCase(string) {
+  return string.replace(/-(.)/g, function(match, chr) {
+    return chr.toUpperCase();
+  });
+}
+
+/**
+ * Determines if the specified string consists entirely of whitespace.
+ */
+function isEmpty(string) {
+   return !/[^\s]/.test(string);
+}
+
+/**
+ * Determines if the CSS value can be converted from a
+ * 'px' suffixed string to a numeric value
+ *
+ * @param {string} value CSS property value
+ * @return {boolean}
+ */
+function isConvertiblePixelValue(value) {
+  return /^\d+px$/.test(value);
+}
+
+export class HTMLtoJSX {
+    private output: string;
+    private level: number;
+    private _inPreTag: boolean;
+
+
+  /**
+   * Handles processing of the specified text node
+   *
+   * @param {TextNode} node
+   */
+  _visitText = (node) => {
+    var parentTag = node.parentNode && node.parentNode.tagName.toLowerCase();
+    if (parentTag === 'textarea' || parentTag === 'style') {
+      // Ignore text content of textareas and styles, as it will have already been moved
+      // to a "defaultValue" attribute and "dangerouslySetInnerHTML" attribute respectively.
+      return;
+    }
+
+    var text = ''
+
+    if (this._inPreTag) {
+      // If this text is contained within a <pre>, we need to ensure the JSX
+      // whitespace coalescing rules don't eat the whitespace. This means
+      // wrapping newlines and sequences of two or more spaces in variables.
+      text = text
+        .replace(/\r/g, '')
+        .replace(/( {2,}|\n|\t|\{|\})/g, function(whitespace) {
+          return '{' + JSON.stringify(whitespace) + '}';
+        });
+    } else {
+      // If there's a newline in the text, adjust the indent level
+      if (text.indexOf('\n') > -1) {
+      }
+    }
+    this.output += text;
+  }
+
+
+
+};
+
+/**
+ * Handles parsing of inline styles
+ */
+export class StyleParser {
+  styles = {};
+  toJSXString = () => {
+    for (var key in this.styles) {
+      if (!this.styles.hasOwnProperty(key)) {
+      }
+    }
+  }
+}
\ No newline at end of file

From 4281bf5752b58ac466723e2339e49aad0f3ac298 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 2 Jun 2016 07:35:58 -0700
Subject: [PATCH 153/332] Allow trailing commas in function parameter and
 argument lists

---
 src/compiler/checker.ts                       | 20 +++++++------------
 .../reference/ArrowFunction2.errors.txt       |  3 ---
 ...serErrorRecovery_ParameterList3.errors.txt |  8 --------
 .../parserErrorRecovery_ParameterList3.js     |  7 -------
 .../parserParameterList12.errors.txt          |  8 --------
 .../reference/parserParameterList12.symbols   |  5 +++++
 .../reference/parserParameterList12.types     |  5 +++++
 ...gCommasInFunctionParametersAndArguments.js |  9 +++++++++
 ...asInFunctionParametersAndArguments.symbols |  8 ++++++++
 ...mmasInFunctionParametersAndArguments.types | 10 ++++++++++
 ...gCommasInFunctionParametersAndArguments.ts |  3 +++
 .../parserErrorRecovery_ParameterList3.ts     |  2 --
 .../fourslash/trailingCommaSignatureHelp.ts   | 15 ++++++++++++++
 13 files changed, 62 insertions(+), 41 deletions(-)
 delete mode 100644 tests/baselines/reference/parserErrorRecovery_ParameterList3.errors.txt
 delete mode 100644 tests/baselines/reference/parserErrorRecovery_ParameterList3.js
 delete mode 100644 tests/baselines/reference/parserParameterList12.errors.txt
 create mode 100644 tests/baselines/reference/parserParameterList12.symbols
 create mode 100644 tests/baselines/reference/parserParameterList12.types
 create mode 100644 tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
 create mode 100644 tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols
 create mode 100644 tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types
 create mode 100644 tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
 delete mode 100644 tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ParameterLists/parserErrorRecovery_ParameterList3.ts
 create mode 100644 tests/cases/fourslash/trailingCommaSignatureHelp.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 06ef2463402..402d6455387 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -10322,7 +10322,7 @@ namespace ts {
         }
 
         function hasCorrectArity(node: CallLikeExpression, args: Expression[], signature: Signature) {
-            let adjustedArgCount: number;            // Apparent number of arguments we will have in this call
+            let argCount: number;            // Apparent number of arguments we will have in this call
             let typeArguments: NodeArray<TypeNode>;  // Type arguments (undefined if none)
             let callIsIncomplete: boolean;           // In incomplete call we want to be lenient when we have too few arguments
             let isDecorator: boolean;
@@ -10333,7 +10333,7 @@ namespace ts {
 
                 // Even if the call is incomplete, we'll have a missing expression as our last argument,
                 // so we can say the count is just the arg list length
-                adjustedArgCount = args.length;
+                argCount = args.length;
                 typeArguments = undefined;
 
                 if (tagExpression.template.kind === SyntaxKind.TemplateExpression) {
@@ -10356,7 +10356,7 @@ namespace ts {
             else if (node.kind === SyntaxKind.Decorator) {
                 isDecorator = true;
                 typeArguments = undefined;
-                adjustedArgCount = getEffectiveArgumentCount(node, /*args*/ undefined, signature);
+                argCount = getEffectiveArgumentCount(node, /*args*/ undefined, signature);
             }
             else {
                 const callExpression = <CallExpression>node;
@@ -10367,8 +10367,7 @@ namespace ts {
                     return signature.minArgumentCount === 0;
                 }
 
-                // For IDE scenarios we may have an incomplete call, so a trailing comma is tantamount to adding another argument.
-                adjustedArgCount = callExpression.arguments.hasTrailingComma ? args.length + 1 : args.length;
+                argCount = args.length;
 
                 // If we are missing the close paren, the call is incomplete.
                 callIsIncomplete = (<CallExpression>callExpression).arguments.end === callExpression.end;
@@ -10392,12 +10391,12 @@ namespace ts {
             }
 
             // Too many arguments implies incorrect arity.
-            if (!signature.hasRestParameter && adjustedArgCount > signature.parameters.length) {
+            if (!signature.hasRestParameter && argCount > signature.parameters.length) {
                 return false;
             }
 
             // If the call is incomplete, we should skip the lower bound check.
-            const hasEnoughArguments = adjustedArgCount >= signature.minArgumentCount;
+            const hasEnoughArguments = argCount >= signature.minArgumentCount;
             return callIsIncomplete || hasEnoughArguments;
         }
 
@@ -18027,10 +18026,6 @@ namespace ts {
         }
 
         function checkGrammarParameterList(parameters: NodeArray<ParameterDeclaration>) {
-            if (checkGrammarForDisallowedTrailingComma(parameters)) {
-                return true;
-            }
-
             let seenOptionalParameter = false;
             const parameterCount = parameters.length;
 
@@ -18149,8 +18144,7 @@ namespace ts {
         }
 
         function checkGrammarArguments(node: CallExpression, args: NodeArray<Expression>): boolean {
-            return checkGrammarForDisallowedTrailingComma(args) ||
-                checkGrammarForOmittedArgument(node, args);
+            return checkGrammarForOmittedArgument(node, args);
         }
 
         function checkGrammarHeritageClause(node: HeritageClause): boolean {
diff --git a/tests/baselines/reference/ArrowFunction2.errors.txt b/tests/baselines/reference/ArrowFunction2.errors.txt
index 3b9ba21f15a..d18bc483acc 100644
--- a/tests/baselines/reference/ArrowFunction2.errors.txt
+++ b/tests/baselines/reference/ArrowFunction2.errors.txt
@@ -1,12 +1,9 @@
 tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/ArrowFunction2.ts(1,13): error TS2304: Cannot find name 'b'.
-tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/ArrowFunction2.ts(1,14): error TS1009: Trailing comma not allowed.
 
 
 ==== tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/ArrowFunction2.ts (2 errors) ====
     var v = (a: b,) => {
                 ~
 !!! error TS2304: Cannot find name 'b'.
-                 ~
-!!! error TS1009: Trailing comma not allowed.
        
     };
\ No newline at end of file
diff --git a/tests/baselines/reference/parserErrorRecovery_ParameterList3.errors.txt b/tests/baselines/reference/parserErrorRecovery_ParameterList3.errors.txt
deleted file mode 100644
index df73dc51ce1..00000000000
--- a/tests/baselines/reference/parserErrorRecovery_ParameterList3.errors.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ParameterLists/parserErrorRecovery_ParameterList3.ts(1,13): error TS1009: Trailing comma not allowed.
-
-
-==== tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ParameterLists/parserErrorRecovery_ParameterList3.ts (1 errors) ====
-    function f(a,) {
-                ~
-!!! error TS1009: Trailing comma not allowed.
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/parserErrorRecovery_ParameterList3.js b/tests/baselines/reference/parserErrorRecovery_ParameterList3.js
deleted file mode 100644
index 4c20e676f40..00000000000
--- a/tests/baselines/reference/parserErrorRecovery_ParameterList3.js
+++ /dev/null
@@ -1,7 +0,0 @@
-//// [parserErrorRecovery_ParameterList3.ts]
-function f(a,) {
-}
-
-//// [parserErrorRecovery_ParameterList3.js]
-function f(a) {
-}
diff --git a/tests/baselines/reference/parserParameterList12.errors.txt b/tests/baselines/reference/parserParameterList12.errors.txt
deleted file mode 100644
index 686b29f63b1..00000000000
--- a/tests/baselines/reference/parserParameterList12.errors.txt
+++ /dev/null
@@ -1,8 +0,0 @@
-tests/cases/conformance/parser/ecmascript5/ParameterLists/parserParameterList12.ts(1,13): error TS1009: Trailing comma not allowed.
-
-
-==== tests/cases/conformance/parser/ecmascript5/ParameterLists/parserParameterList12.ts (1 errors) ====
-    function F(a,) {
-                ~
-!!! error TS1009: Trailing comma not allowed.
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/parserParameterList12.symbols b/tests/baselines/reference/parserParameterList12.symbols
new file mode 100644
index 00000000000..efaab7d1b13
--- /dev/null
+++ b/tests/baselines/reference/parserParameterList12.symbols
@@ -0,0 +1,5 @@
+=== tests/cases/conformance/parser/ecmascript5/ParameterLists/parserParameterList12.ts ===
+function F(a,) {
+>F : Symbol(F, Decl(parserParameterList12.ts, 0, 0))
+>a : Symbol(a, Decl(parserParameterList12.ts, 0, 11))
+}
diff --git a/tests/baselines/reference/parserParameterList12.types b/tests/baselines/reference/parserParameterList12.types
new file mode 100644
index 00000000000..7ff43cd6a15
--- /dev/null
+++ b/tests/baselines/reference/parserParameterList12.types
@@ -0,0 +1,5 @@
+=== tests/cases/conformance/parser/ecmascript5/ParameterLists/parserParameterList12.ts ===
+function F(a,) {
+>F : (a: any) => void
+>a : any
+}
diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
new file mode 100644
index 00000000000..5fb4b7d638f
--- /dev/null
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
@@ -0,0 +1,9 @@
+//// [trailingCommasInFunctionParametersAndArguments.ts]
+function f1(x,) {}
+
+f1(1,);
+
+
+//// [trailingCommasInFunctionParametersAndArguments.js]
+function f1(x) { }
+f1(1);
diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols
new file mode 100644
index 00000000000..5eb9d75807b
--- /dev/null
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols
@@ -0,0 +1,8 @@
+=== tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts ===
+function f1(x,) {}
+>f1 : Symbol(f1, Decl(trailingCommasInFunctionParametersAndArguments.ts, 0, 0))
+>x : Symbol(x, Decl(trailingCommasInFunctionParametersAndArguments.ts, 0, 12))
+
+f1(1,);
+>f1 : Symbol(f1, Decl(trailingCommasInFunctionParametersAndArguments.ts, 0, 0))
+
diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types
new file mode 100644
index 00000000000..4af2326076b
--- /dev/null
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types
@@ -0,0 +1,10 @@
+=== tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts ===
+function f1(x,) {}
+>f1 : (x: any) => void
+>x : any
+
+f1(1,);
+>f1(1,) : void
+>f1 : (x: any) => void
+>1 : number
+
diff --git a/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts b/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
new file mode 100644
index 00000000000..0492ed989e3
--- /dev/null
+++ b/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
@@ -0,0 +1,3 @@
+function f1(x,) {}
+
+f1(1,);
diff --git a/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ParameterLists/parserErrorRecovery_ParameterList3.ts b/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ParameterLists/parserErrorRecovery_ParameterList3.ts
deleted file mode 100644
index c51a52ef83e..00000000000
--- a/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ParameterLists/parserErrorRecovery_ParameterList3.ts
+++ /dev/null
@@ -1,2 +0,0 @@
-function f(a,) {
-}
\ No newline at end of file
diff --git a/tests/cases/fourslash/trailingCommaSignatureHelp.ts b/tests/cases/fourslash/trailingCommaSignatureHelp.ts
new file mode 100644
index 00000000000..4881571cd2b
--- /dev/null
+++ b/tests/cases/fourslash/trailingCommaSignatureHelp.ts
@@ -0,0 +1,15 @@
+/// <reference path="fourslash.ts" />
+
+////function str(n: number): string;
+/////**
+//// * Stringifies a number with radix
+//// * @param radix The radix
+//// */
+////function str(n: number, radix: number): string;
+////function str(n: number, radix?: number): string { return ""; }
+
+edit.insert("str(1,");
+verify.currentParameterHelpArgumentNameIs("radix");
+verify.currentParameterHelpArgumentDocCommentIs("The radix");
+verify.currentSignatureHelpIs("str(n: number, radix: number): string");
+verify.currentSignatureHelpDocCommentIs("Stringifies a number with radix");

From 20bab14224bf9f7a7228f416a61807b1f7f73e4a Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 2 Jun 2016 09:39:47 -0700
Subject: [PATCH 154/332] Add tests

---
 .../reference/arrayLiteralWidened.js          | 15 ++++
 .../reference/arrayLiteralWidened.symbols     | 38 +++++++--
 .../reference/arrayLiteralWidened.types       | 29 +++++++
 .../reference/initializersWidened.js          | 42 +++++++++-
 .../reference/initializersWidened.symbols     | 55 ++++++++++++-
 .../reference/initializersWidened.types       | 77 ++++++++++++++++++-
 .../logicalAndOperatorWithEveryType.types     |  2 +-
 .../reference/objectLiteralWidened.js         | 40 +++++++++-
 .../reference/objectLiteralWidened.symbols    | 53 +++++++++++--
 .../reference/objectLiteralWidened.types      | 54 ++++++++++++-
 .../reference/strictNullChecksNoWidening.js   | 31 ++++++++
 .../strictNullChecksNoWidening.symbols        | 48 ++++++++++++
 .../strictNullChecksNoWidening.types          | 67 ++++++++++++++++
 .../widenedTypes/arrayLiteralWidened.ts       |  9 +++
 .../widenedTypes/initializersWidened.ts       | 24 +++++-
 .../widenedTypes/objectLiteralWidened.ts      | 22 +++++-
 .../strictNullChecksNoWidening.ts             | 17 ++++
 17 files changed, 584 insertions(+), 39 deletions(-)
 create mode 100644 tests/baselines/reference/strictNullChecksNoWidening.js
 create mode 100644 tests/baselines/reference/strictNullChecksNoWidening.symbols
 create mode 100644 tests/baselines/reference/strictNullChecksNoWidening.types
 create mode 100644 tests/cases/conformance/types/typeRelationships/widenedTypes/strictNullChecksNoWidening.ts

diff --git a/tests/baselines/reference/arrayLiteralWidened.js b/tests/baselines/reference/arrayLiteralWidened.js
index a250c47849d..5b7346b8738 100644
--- a/tests/baselines/reference/arrayLiteralWidened.js
+++ b/tests/baselines/reference/arrayLiteralWidened.js
@@ -2,6 +2,7 @@
 // array literals are widened upon assignment according to their element type
 
 var a = []; // any[]
+var a = [,,];
 
 var a = [null, null];
 var a = [undefined, undefined];
@@ -12,11 +13,20 @@ var b = [[undefined, undefined]];
 
 var c = [[[]]]; // any[][][]
 var c = [[[null]],[undefined]]
+
+// no widening when one or more elements are non-widening
+
+var x: undefined = undefined;
+
+var d = [x];
+var d = [, x];
+var d = [undefined, x];
 
 
 //// [arrayLiteralWidened.js]
 // array literals are widened upon assignment according to their element type
 var a = []; // any[]
+var a = [, ,];
 var a = [null, null];
 var a = [undefined, undefined];
 var b = [[], [null, null]]; // any[][]
@@ -24,3 +34,8 @@ var b = [[], []];
 var b = [[undefined, undefined]];
 var c = [[[]]]; // any[][][]
 var c = [[[null]], [undefined]];
+// no widening when one or more elements are non-widening
+var x = undefined;
+var d = [x];
+var d = [, x];
+var d = [undefined, x];
diff --git a/tests/baselines/reference/arrayLiteralWidened.symbols b/tests/baselines/reference/arrayLiteralWidened.symbols
index ba058aeded1..48137812a5d 100644
--- a/tests/baselines/reference/arrayLiteralWidened.symbols
+++ b/tests/baselines/reference/arrayLiteralWidened.symbols
@@ -2,31 +2,53 @@
 // array literals are widened upon assignment according to their element type
 
 var a = []; // any[]
->a : Symbol(a, Decl(arrayLiteralWidened.ts, 2, 3), Decl(arrayLiteralWidened.ts, 4, 3), Decl(arrayLiteralWidened.ts, 5, 3))
+>a : Symbol(a, Decl(arrayLiteralWidened.ts, 2, 3), Decl(arrayLiteralWidened.ts, 3, 3), Decl(arrayLiteralWidened.ts, 5, 3), Decl(arrayLiteralWidened.ts, 6, 3))
+
+var a = [,,];
+>a : Symbol(a, Decl(arrayLiteralWidened.ts, 2, 3), Decl(arrayLiteralWidened.ts, 3, 3), Decl(arrayLiteralWidened.ts, 5, 3), Decl(arrayLiteralWidened.ts, 6, 3))
 
 var a = [null, null];
->a : Symbol(a, Decl(arrayLiteralWidened.ts, 2, 3), Decl(arrayLiteralWidened.ts, 4, 3), Decl(arrayLiteralWidened.ts, 5, 3))
+>a : Symbol(a, Decl(arrayLiteralWidened.ts, 2, 3), Decl(arrayLiteralWidened.ts, 3, 3), Decl(arrayLiteralWidened.ts, 5, 3), Decl(arrayLiteralWidened.ts, 6, 3))
 
 var a = [undefined, undefined];
->a : Symbol(a, Decl(arrayLiteralWidened.ts, 2, 3), Decl(arrayLiteralWidened.ts, 4, 3), Decl(arrayLiteralWidened.ts, 5, 3))
+>a : Symbol(a, Decl(arrayLiteralWidened.ts, 2, 3), Decl(arrayLiteralWidened.ts, 3, 3), Decl(arrayLiteralWidened.ts, 5, 3), Decl(arrayLiteralWidened.ts, 6, 3))
 >undefined : Symbol(undefined)
 >undefined : Symbol(undefined)
 
 var b = [[], [null, null]]; // any[][]
->b : Symbol(b, Decl(arrayLiteralWidened.ts, 7, 3), Decl(arrayLiteralWidened.ts, 8, 3), Decl(arrayLiteralWidened.ts, 9, 3))
+>b : Symbol(b, Decl(arrayLiteralWidened.ts, 8, 3), Decl(arrayLiteralWidened.ts, 9, 3), Decl(arrayLiteralWidened.ts, 10, 3))
 
 var b = [[], []];
->b : Symbol(b, Decl(arrayLiteralWidened.ts, 7, 3), Decl(arrayLiteralWidened.ts, 8, 3), Decl(arrayLiteralWidened.ts, 9, 3))
+>b : Symbol(b, Decl(arrayLiteralWidened.ts, 8, 3), Decl(arrayLiteralWidened.ts, 9, 3), Decl(arrayLiteralWidened.ts, 10, 3))
 
 var b = [[undefined, undefined]];
->b : Symbol(b, Decl(arrayLiteralWidened.ts, 7, 3), Decl(arrayLiteralWidened.ts, 8, 3), Decl(arrayLiteralWidened.ts, 9, 3))
+>b : Symbol(b, Decl(arrayLiteralWidened.ts, 8, 3), Decl(arrayLiteralWidened.ts, 9, 3), Decl(arrayLiteralWidened.ts, 10, 3))
 >undefined : Symbol(undefined)
 >undefined : Symbol(undefined)
 
 var c = [[[]]]; // any[][][]
->c : Symbol(c, Decl(arrayLiteralWidened.ts, 11, 3), Decl(arrayLiteralWidened.ts, 12, 3))
+>c : Symbol(c, Decl(arrayLiteralWidened.ts, 12, 3), Decl(arrayLiteralWidened.ts, 13, 3))
 
 var c = [[[null]],[undefined]]
->c : Symbol(c, Decl(arrayLiteralWidened.ts, 11, 3), Decl(arrayLiteralWidened.ts, 12, 3))
+>c : Symbol(c, Decl(arrayLiteralWidened.ts, 12, 3), Decl(arrayLiteralWidened.ts, 13, 3))
 >undefined : Symbol(undefined)
 
+// no widening when one or more elements are non-widening
+
+var x: undefined = undefined;
+>x : Symbol(x, Decl(arrayLiteralWidened.ts, 17, 3))
+>undefined : Symbol(undefined)
+
+var d = [x];
+>d : Symbol(d, Decl(arrayLiteralWidened.ts, 19, 3), Decl(arrayLiteralWidened.ts, 20, 3), Decl(arrayLiteralWidened.ts, 21, 3))
+>x : Symbol(x, Decl(arrayLiteralWidened.ts, 17, 3))
+
+var d = [, x];
+>d : Symbol(d, Decl(arrayLiteralWidened.ts, 19, 3), Decl(arrayLiteralWidened.ts, 20, 3), Decl(arrayLiteralWidened.ts, 21, 3))
+>x : Symbol(x, Decl(arrayLiteralWidened.ts, 17, 3))
+
+var d = [undefined, x];
+>d : Symbol(d, Decl(arrayLiteralWidened.ts, 19, 3), Decl(arrayLiteralWidened.ts, 20, 3), Decl(arrayLiteralWidened.ts, 21, 3))
+>undefined : Symbol(undefined)
+>x : Symbol(x, Decl(arrayLiteralWidened.ts, 17, 3))
+
diff --git a/tests/baselines/reference/arrayLiteralWidened.types b/tests/baselines/reference/arrayLiteralWidened.types
index 83db7046eed..6237cd79a7e 100644
--- a/tests/baselines/reference/arrayLiteralWidened.types
+++ b/tests/baselines/reference/arrayLiteralWidened.types
@@ -5,6 +5,12 @@ var a = []; // any[]
 >a : any[]
 >[] : undefined[]
 
+var a = [,,];
+>a : any[]
+>[,,] : undefined[]
+> : undefined
+> : undefined
+
 var a = [null, null];
 >a : any[]
 >[null, null] : null[]
@@ -53,3 +59,26 @@ var c = [[[null]],[undefined]]
 >[undefined] : undefined[]
 >undefined : undefined
 
+// no widening when one or more elements are non-widening
+
+var x: undefined = undefined;
+>x : undefined
+>undefined : undefined
+
+var d = [x];
+>d : undefined[]
+>[x] : undefined[]
+>x : undefined
+
+var d = [, x];
+>d : undefined[]
+>[, x] : undefined[]
+> : undefined
+>x : undefined
+
+var d = [undefined, x];
+>d : undefined[]
+>[undefined, x] : undefined[]
+>undefined : undefined
+>x : undefined
+
diff --git a/tests/baselines/reference/initializersWidened.js b/tests/baselines/reference/initializersWidened.js
index fce0750a600..3954735ee6e 100644
--- a/tests/baselines/reference/initializersWidened.js
+++ b/tests/baselines/reference/initializersWidened.js
@@ -1,10 +1,44 @@
 //// [initializersWidened.ts]
 // these are widened to any at the point of assignment
 
-var x = null;
-var y = undefined;
+var x1 = null;
+var y1 = undefined;
+var z1 = void 0;
+
+// these are not widened
+
+var x2: null;
+var y2: undefined;
+
+var x3: null = null;
+var y3: undefined = undefined;
+var z3: undefined = void 0;
+
+// widen only when all constituents of union are widening
+
+var x4 = null || null;
+var y4 = undefined || undefined;
+var z4 = void 0 || void 0;
+
+var x5 = null || x2;
+var y5 = undefined || y2;
+var z5 = void 0 || y2;
 
 //// [initializersWidened.js]
 // these are widened to any at the point of assignment
-var x = null;
-var y = undefined;
+var x1 = null;
+var y1 = undefined;
+var z1 = void 0;
+// these are not widened
+var x2;
+var y2;
+var x3 = null;
+var y3 = undefined;
+var z3 = void 0;
+// widen only when all constituents of union are widening
+var x4 = null || null;
+var y4 = undefined || undefined;
+var z4 = void 0 || void 0;
+var x5 = null || x2;
+var y5 = undefined || y2;
+var z5 = void 0 || y2;
diff --git a/tests/baselines/reference/initializersWidened.symbols b/tests/baselines/reference/initializersWidened.symbols
index 625c066a058..252a248bec8 100644
--- a/tests/baselines/reference/initializersWidened.symbols
+++ b/tests/baselines/reference/initializersWidened.symbols
@@ -1,10 +1,57 @@
 === tests/cases/conformance/types/typeRelationships/widenedTypes/initializersWidened.ts ===
 // these are widened to any at the point of assignment
 
-var x = null;
->x : Symbol(x, Decl(initializersWidened.ts, 2, 3))
+var x1 = null;
+>x1 : Symbol(x1, Decl(initializersWidened.ts, 2, 3))
 
-var y = undefined;
->y : Symbol(y, Decl(initializersWidened.ts, 3, 3))
+var y1 = undefined;
+>y1 : Symbol(y1, Decl(initializersWidened.ts, 3, 3))
 >undefined : Symbol(undefined)
 
+var z1 = void 0;
+>z1 : Symbol(z1, Decl(initializersWidened.ts, 4, 3))
+
+// these are not widened
+
+var x2: null;
+>x2 : Symbol(x2, Decl(initializersWidened.ts, 8, 3))
+
+var y2: undefined;
+>y2 : Symbol(y2, Decl(initializersWidened.ts, 9, 3))
+
+var x3: null = null;
+>x3 : Symbol(x3, Decl(initializersWidened.ts, 11, 3))
+
+var y3: undefined = undefined;
+>y3 : Symbol(y3, Decl(initializersWidened.ts, 12, 3))
+>undefined : Symbol(undefined)
+
+var z3: undefined = void 0;
+>z3 : Symbol(z3, Decl(initializersWidened.ts, 13, 3))
+
+// widen only when all constituents of union are widening
+
+var x4 = null || null;
+>x4 : Symbol(x4, Decl(initializersWidened.ts, 17, 3))
+
+var y4 = undefined || undefined;
+>y4 : Symbol(y4, Decl(initializersWidened.ts, 18, 3))
+>undefined : Symbol(undefined)
+>undefined : Symbol(undefined)
+
+var z4 = void 0 || void 0;
+>z4 : Symbol(z4, Decl(initializersWidened.ts, 19, 3))
+
+var x5 = null || x2;
+>x5 : Symbol(x5, Decl(initializersWidened.ts, 21, 3))
+>x2 : Symbol(x2, Decl(initializersWidened.ts, 8, 3))
+
+var y5 = undefined || y2;
+>y5 : Symbol(y5, Decl(initializersWidened.ts, 22, 3))
+>undefined : Symbol(undefined)
+>y2 : Symbol(y2, Decl(initializersWidened.ts, 9, 3))
+
+var z5 = void 0 || y2;
+>z5 : Symbol(z5, Decl(initializersWidened.ts, 23, 3))
+>y2 : Symbol(y2, Decl(initializersWidened.ts, 9, 3))
+
diff --git a/tests/baselines/reference/initializersWidened.types b/tests/baselines/reference/initializersWidened.types
index 15705589246..766f859029a 100644
--- a/tests/baselines/reference/initializersWidened.types
+++ b/tests/baselines/reference/initializersWidened.types
@@ -1,11 +1,80 @@
 === tests/cases/conformance/types/typeRelationships/widenedTypes/initializersWidened.ts ===
 // these are widened to any at the point of assignment
 
-var x = null;
->x : any
+var x1 = null;
+>x1 : any
 >null : null
 
-var y = undefined;
->y : any
+var y1 = undefined;
+>y1 : any
 >undefined : undefined
 
+var z1 = void 0;
+>z1 : any
+>void 0 : undefined
+>0 : number
+
+// these are not widened
+
+var x2: null;
+>x2 : null
+>null : null
+
+var y2: undefined;
+>y2 : undefined
+
+var x3: null = null;
+>x3 : null
+>null : null
+>null : null
+
+var y3: undefined = undefined;
+>y3 : undefined
+>undefined : undefined
+
+var z3: undefined = void 0;
+>z3 : undefined
+>void 0 : undefined
+>0 : number
+
+// widen only when all constituents of union are widening
+
+var x4 = null || null;
+>x4 : any
+>null || null : null
+>null : null
+>null : null
+
+var y4 = undefined || undefined;
+>y4 : any
+>undefined || undefined : undefined
+>undefined : undefined
+>undefined : undefined
+
+var z4 = void 0 || void 0;
+>z4 : any
+>void 0 || void 0 : undefined
+>void 0 : undefined
+>0 : number
+>void 0 : undefined
+>0 : number
+
+var x5 = null || x2;
+>x5 : null
+>null || x2 : null
+>null : null
+>x2 : null
+
+var y5 = undefined || y2;
+>y5 : undefined
+>undefined || y2 : undefined
+>undefined : undefined
+>y2 : undefined
+
+var z5 = void 0 || y2;
+>z5 : undefined
+>void 0 || y2 : undefined
+>void 0 : undefined
+>0 : number
+>y2 : undefined
+
diff --git a/tests/baselines/reference/logicalAndOperatorWithEveryType.types b/tests/baselines/reference/logicalAndOperatorWithEveryType.types
index b2628eed921..bd913e94da5 100644
--- a/tests/baselines/reference/logicalAndOperatorWithEveryType.types
+++ b/tests/baselines/reference/logicalAndOperatorWithEveryType.types
@@ -623,7 +623,7 @@ var rj8 = a8 && undefined;
 
 var rj9 = null && undefined;
 >rj9 : any
->null && undefined : null
+>null && undefined : undefined
 >null : null
 >undefined : undefined
 
diff --git a/tests/baselines/reference/objectLiteralWidened.js b/tests/baselines/reference/objectLiteralWidened.js
index 4de228cb14a..98d79133540 100644
--- a/tests/baselines/reference/objectLiteralWidened.js
+++ b/tests/baselines/reference/objectLiteralWidened.js
@@ -1,29 +1,61 @@
 //// [objectLiteralWidened.ts]
 // object literal properties are widened to any
 
-var x = {
+var x1 = {
     foo: null,
     bar: undefined
 }
 
-var y = {
+var y1 = {
     foo: null,
     bar: {
         baz: null,
         boo: undefined
     }
+}
+
+// these are not widened
+
+var u: undefined = undefined;
+var n: null = null;
+
+var x2 = {
+    foo: n,
+    bar: u
+}
+
+var y2 = {
+    foo: n,
+    bar: {
+        baz: n,
+        boo: u
+    }
 }
 
 //// [objectLiteralWidened.js]
 // object literal properties are widened to any
-var x = {
+var x1 = {
     foo: null,
     bar: undefined
 };
-var y = {
+var y1 = {
     foo: null,
     bar: {
         baz: null,
         boo: undefined
     }
 };
+// these are not widened
+var u = undefined;
+var n = null;
+var x2 = {
+    foo: n,
+    bar: u
+};
+var y2 = {
+    foo: n,
+    bar: {
+        baz: n,
+        boo: u
+    }
+};
diff --git a/tests/baselines/reference/objectLiteralWidened.symbols b/tests/baselines/reference/objectLiteralWidened.symbols
index 0bf077cd9d8..4b2a1b4a001 100644
--- a/tests/baselines/reference/objectLiteralWidened.symbols
+++ b/tests/baselines/reference/objectLiteralWidened.symbols
@@ -1,22 +1,22 @@
 === tests/cases/conformance/types/typeRelationships/widenedTypes/objectLiteralWidened.ts ===
 // object literal properties are widened to any
 
-var x = {
->x : Symbol(x, Decl(objectLiteralWidened.ts, 2, 3))
+var x1 = {
+>x1 : Symbol(x1, Decl(objectLiteralWidened.ts, 2, 3))
 
     foo: null,
->foo : Symbol(foo, Decl(objectLiteralWidened.ts, 2, 9))
+>foo : Symbol(foo, Decl(objectLiteralWidened.ts, 2, 10))
 
     bar: undefined
 >bar : Symbol(bar, Decl(objectLiteralWidened.ts, 3, 14))
 >undefined : Symbol(undefined)
 }
 
-var y = {
->y : Symbol(y, Decl(objectLiteralWidened.ts, 7, 3))
+var y1 = {
+>y1 : Symbol(y1, Decl(objectLiteralWidened.ts, 7, 3))
 
     foo: null,
->foo : Symbol(foo, Decl(objectLiteralWidened.ts, 7, 9))
+>foo : Symbol(foo, Decl(objectLiteralWidened.ts, 7, 10))
 
     bar: {
 >bar : Symbol(bar, Decl(objectLiteralWidened.ts, 8, 14))
@@ -29,3 +29,44 @@ var y = {
 >undefined : Symbol(undefined)
     }
 }
+
+// these are not widened
+
+var u: undefined = undefined;
+>u : Symbol(u, Decl(objectLiteralWidened.ts, 17, 3))
+>undefined : Symbol(undefined)
+
+var n: null = null;
+>n : Symbol(n, Decl(objectLiteralWidened.ts, 18, 3))
+
+var x2 = {
+>x2 : Symbol(x2, Decl(objectLiteralWidened.ts, 20, 3))
+
+    foo: n,
+>foo : Symbol(foo, Decl(objectLiteralWidened.ts, 20, 10))
+>n : Symbol(n, Decl(objectLiteralWidened.ts, 18, 3))
+
+    bar: u
+>bar : Symbol(bar, Decl(objectLiteralWidened.ts, 21, 11))
+>u : Symbol(u, Decl(objectLiteralWidened.ts, 17, 3))
+}
+
+var y2 = {
+>y2 : Symbol(y2, Decl(objectLiteralWidened.ts, 25, 3))
+
+    foo: n,
+>foo : Symbol(foo, Decl(objectLiteralWidened.ts, 25, 10))
+>n : Symbol(n, Decl(objectLiteralWidened.ts, 18, 3))
+
+    bar: {
+>bar : Symbol(bar, Decl(objectLiteralWidened.ts, 26, 11))
+
+        baz: n,
+>baz : Symbol(baz, Decl(objectLiteralWidened.ts, 27, 10))
+>n : Symbol(n, Decl(objectLiteralWidened.ts, 18, 3))
+
+        boo: u
+>boo : Symbol(boo, Decl(objectLiteralWidened.ts, 28, 15))
+>u : Symbol(u, Decl(objectLiteralWidened.ts, 17, 3))
+    }
+}
diff --git a/tests/baselines/reference/objectLiteralWidened.types b/tests/baselines/reference/objectLiteralWidened.types
index 9f47e47795d..66309202617 100644
--- a/tests/baselines/reference/objectLiteralWidened.types
+++ b/tests/baselines/reference/objectLiteralWidened.types
@@ -1,8 +1,8 @@
 === tests/cases/conformance/types/typeRelationships/widenedTypes/objectLiteralWidened.ts ===
 // object literal properties are widened to any
 
-var x = {
->x : { foo: any; bar: any; }
+var x1 = {
+>x1 : { foo: any; bar: any; }
 >{    foo: null,    bar: undefined} : { foo: null; bar: undefined; }
 
     foo: null,
@@ -14,8 +14,8 @@ var x = {
 >undefined : undefined
 }
 
-var y = {
->y : { foo: any; bar: { baz: any; boo: any; }; }
+var y1 = {
+>y1 : { foo: any; bar: { baz: any; boo: any; }; }
 >{    foo: null,    bar: {        baz: null,        boo: undefined    }} : { foo: null; bar: { baz: null; boo: undefined; }; }
 
     foo: null,
@@ -35,3 +35,49 @@ var y = {
 >undefined : undefined
     }
 }
+
+// these are not widened
+
+var u: undefined = undefined;
+>u : undefined
+>undefined : undefined
+
+var n: null = null;
+>n : null
+>null : null
+>null : null
+
+var x2 = {
+>x2 : { foo: null; bar: undefined; }
+>{    foo: n,    bar: u} : { foo: null; bar: undefined; }
+
+    foo: n,
+>foo : null
+>n : null
+
+    bar: u
+>bar : undefined
+>u : undefined
+}
+
+var y2 = {
+>y2 : { foo: null; bar: { baz: null; boo: undefined; }; }
+>{    foo: n,    bar: {        baz: n,        boo: u    }} : { foo: null; bar: { baz: null; boo: undefined; }; }
+
+    foo: n,
+>foo : null
+>n : null
+
+    bar: {
+>bar : { baz: null; boo: undefined; }
+>{        baz: n,        boo: u    } : { baz: null; boo: undefined; }
+
+        baz: n,
+>baz : null
+>n : null
+
+        boo: u
+>boo : undefined
+>u : undefined
+    }
+}
diff --git a/tests/baselines/reference/strictNullChecksNoWidening.js b/tests/baselines/reference/strictNullChecksNoWidening.js
new file mode 100644
index 00000000000..ba26a04fc13
--- /dev/null
+++ b/tests/baselines/reference/strictNullChecksNoWidening.js
@@ -0,0 +1,31 @@
+//// [strictNullChecksNoWidening.ts]
+
+var a1 = null;
+var a2 = undefined;
+var a3 = void 0;
+
+var b1 = [];
+var b2 = [,];
+var b3 = [undefined];
+var b4 = [[], []];
+var b5 = [[], [,]];
+
+declare function f<T>(x: T): T;
+
+var c1 = f(null);
+var c2 = f(undefined);
+var c3 = f([]);
+
+
+//// [strictNullChecksNoWidening.js]
+var a1 = null;
+var a2 = undefined;
+var a3 = void 0;
+var b1 = [];
+var b2 = [,];
+var b3 = [undefined];
+var b4 = [[], []];
+var b5 = [[], [,]];
+var c1 = f(null);
+var c2 = f(undefined);
+var c3 = f([]);
diff --git a/tests/baselines/reference/strictNullChecksNoWidening.symbols b/tests/baselines/reference/strictNullChecksNoWidening.symbols
new file mode 100644
index 00000000000..a23a0d2e926
--- /dev/null
+++ b/tests/baselines/reference/strictNullChecksNoWidening.symbols
@@ -0,0 +1,48 @@
+=== tests/cases/conformance/types/typeRelationships/widenedTypes/strictNullChecksNoWidening.ts ===
+
+var a1 = null;
+>a1 : Symbol(a1, Decl(strictNullChecksNoWidening.ts, 1, 3))
+
+var a2 = undefined;
+>a2 : Symbol(a2, Decl(strictNullChecksNoWidening.ts, 2, 3))
+>undefined : Symbol(undefined)
+
+var a3 = void 0;
+>a3 : Symbol(a3, Decl(strictNullChecksNoWidening.ts, 3, 3))
+
+var b1 = [];
+>b1 : Symbol(b1, Decl(strictNullChecksNoWidening.ts, 5, 3))
+
+var b2 = [,];
+>b2 : Symbol(b2, Decl(strictNullChecksNoWidening.ts, 6, 3))
+
+var b3 = [undefined];
+>b3 : Symbol(b3, Decl(strictNullChecksNoWidening.ts, 7, 3))
+>undefined : Symbol(undefined)
+
+var b4 = [[], []];
+>b4 : Symbol(b4, Decl(strictNullChecksNoWidening.ts, 8, 3))
+
+var b5 = [[], [,]];
+>b5 : Symbol(b5, Decl(strictNullChecksNoWidening.ts, 9, 3))
+
+declare function f<T>(x: T): T;
+>f : Symbol(f, Decl(strictNullChecksNoWidening.ts, 9, 19))
+>T : Symbol(T, Decl(strictNullChecksNoWidening.ts, 11, 19))
+>x : Symbol(x, Decl(strictNullChecksNoWidening.ts, 11, 22))
+>T : Symbol(T, Decl(strictNullChecksNoWidening.ts, 11, 19))
+>T : Symbol(T, Decl(strictNullChecksNoWidening.ts, 11, 19))
+
+var c1 = f(null);
+>c1 : Symbol(c1, Decl(strictNullChecksNoWidening.ts, 13, 3))
+>f : Symbol(f, Decl(strictNullChecksNoWidening.ts, 9, 19))
+
+var c2 = f(undefined);
+>c2 : Symbol(c2, Decl(strictNullChecksNoWidening.ts, 14, 3))
+>f : Symbol(f, Decl(strictNullChecksNoWidening.ts, 9, 19))
+>undefined : Symbol(undefined)
+
+var c3 = f([]);
+>c3 : Symbol(c3, Decl(strictNullChecksNoWidening.ts, 15, 3))
+>f : Symbol(f, Decl(strictNullChecksNoWidening.ts, 9, 19))
+
diff --git a/tests/baselines/reference/strictNullChecksNoWidening.types b/tests/baselines/reference/strictNullChecksNoWidening.types
new file mode 100644
index 00000000000..6dd2ee3fb4c
--- /dev/null
+++ b/tests/baselines/reference/strictNullChecksNoWidening.types
@@ -0,0 +1,67 @@
+=== tests/cases/conformance/types/typeRelationships/widenedTypes/strictNullChecksNoWidening.ts ===
+
+var a1 = null;
+>a1 : null
+>null : null
+
+var a2 = undefined;
+>a2 : undefined
+>undefined : undefined
+
+var a3 = void 0;
+>a3 : undefined
+>void 0 : undefined
+>0 : number
+
+var b1 = [];
+>b1 : never[]
+>[] : never[]
+
+var b2 = [,];
+>b2 : undefined[]
+>[,] : undefined[]
+> : undefined
+
+var b3 = [undefined];
+>b3 : undefined[]
+>[undefined] : undefined[]
+>undefined : undefined
+
+var b4 = [[], []];
+>b4 : never[][]
+>[[], []] : never[][]
+>[] : never[]
+>[] : never[]
+
+var b5 = [[], [,]];
+>b5 : undefined[][]
+>[[], [,]] : undefined[][]
+>[] : never[]
+>[,] : undefined[]
+> : undefined
+
+declare function f<T>(x: T): T;
+>f : <T>(x: T) => T
+>T : T
+>x : T
+>T : T
+>T : T
+
+var c1 = f(null);
+>c1 : null
+>f(null) : null
+>f : <T>(x: T) => T
+>null : null
+
+var c2 = f(undefined);
+>c2 : undefined
+>f(undefined) : undefined
+>f : <T>(x: T) => T
+>undefined : undefined
+
+var c3 = f([]);
+>c3 : never[]
+>f([]) : never[]
+>f : <T>(x: T) => T
+>[] : never[]
+
diff --git a/tests/cases/conformance/types/typeRelationships/widenedTypes/arrayLiteralWidened.ts b/tests/cases/conformance/types/typeRelationships/widenedTypes/arrayLiteralWidened.ts
index 8af0a5842cc..05428422129 100644
--- a/tests/cases/conformance/types/typeRelationships/widenedTypes/arrayLiteralWidened.ts
+++ b/tests/cases/conformance/types/typeRelationships/widenedTypes/arrayLiteralWidened.ts
@@ -1,6 +1,7 @@
 // array literals are widened upon assignment according to their element type
 
 var a = []; // any[]
+var a = [,,];
 
 var a = [null, null];
 var a = [undefined, undefined];
@@ -11,3 +12,11 @@ var b = [[undefined, undefined]];
 
 var c = [[[]]]; // any[][][]
 var c = [[[null]],[undefined]]
+
+// no widening when one or more elements are non-widening
+
+var x: undefined = undefined;
+
+var d = [x];
+var d = [, x];
+var d = [undefined, x];
diff --git a/tests/cases/conformance/types/typeRelationships/widenedTypes/initializersWidened.ts b/tests/cases/conformance/types/typeRelationships/widenedTypes/initializersWidened.ts
index e79cdc9e168..2eeb96194b7 100644
--- a/tests/cases/conformance/types/typeRelationships/widenedTypes/initializersWidened.ts
+++ b/tests/cases/conformance/types/typeRelationships/widenedTypes/initializersWidened.ts
@@ -1,4 +1,24 @@
 // these are widened to any at the point of assignment
 
-var x = null;
-var y = undefined;
\ No newline at end of file
+var x1 = null;
+var y1 = undefined;
+var z1 = void 0;
+
+// these are not widened
+
+var x2: null;
+var y2: undefined;
+
+var x3: null = null;
+var y3: undefined = undefined;
+var z3: undefined = void 0;
+
+// widen only when all constituents of union are widening
+
+var x4 = null || null;
+var y4 = undefined || undefined;
+var z4 = void 0 || void 0;
+
+var x5 = null || x2;
+var y5 = undefined || y2;
+var z5 = void 0 || y2;
\ No newline at end of file
diff --git a/tests/cases/conformance/types/typeRelationships/widenedTypes/objectLiteralWidened.ts b/tests/cases/conformance/types/typeRelationships/widenedTypes/objectLiteralWidened.ts
index cde44f91168..8b51e526882 100644
--- a/tests/cases/conformance/types/typeRelationships/widenedTypes/objectLiteralWidened.ts
+++ b/tests/cases/conformance/types/typeRelationships/widenedTypes/objectLiteralWidened.ts
@@ -1,14 +1,32 @@
 // object literal properties are widened to any
 
-var x = {
+var x1 = {
     foo: null,
     bar: undefined
 }
 
-var y = {
+var y1 = {
     foo: null,
     bar: {
         baz: null,
         boo: undefined
     }
+}
+
+// these are not widened
+
+var u: undefined = undefined;
+var n: null = null;
+
+var x2 = {
+    foo: n,
+    bar: u
+}
+
+var y2 = {
+    foo: n,
+    bar: {
+        baz: n,
+        boo: u
+    }
 }
\ No newline at end of file
diff --git a/tests/cases/conformance/types/typeRelationships/widenedTypes/strictNullChecksNoWidening.ts b/tests/cases/conformance/types/typeRelationships/widenedTypes/strictNullChecksNoWidening.ts
new file mode 100644
index 00000000000..8f5b4709abf
--- /dev/null
+++ b/tests/cases/conformance/types/typeRelationships/widenedTypes/strictNullChecksNoWidening.ts
@@ -0,0 +1,17 @@
+// @strictNullChecks: true
+
+var a1 = null;
+var a2 = undefined;
+var a3 = void 0;
+
+var b1 = [];
+var b2 = [,];
+var b3 = [undefined];
+var b4 = [[], []];
+var b5 = [[], [,]];
+
+declare function f<T>(x: T): T;
+
+var c1 = f(null);
+var c2 = f(undefined);
+var c3 = f([]);

From fb2df77a59453e72e3bbc92ab4bb9e5c68cb4a8a Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 2 Jun 2016 10:47:47 -0700
Subject: [PATCH 155/332] Remove unused variable

---
 src/compiler/checker.ts | 1 -
 1 file changed, 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 6166234dcf4..b8f078ea9a5 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -120,7 +120,6 @@ namespace ts {
         const undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(TypeFlags.Undefined | TypeFlags.ContainsWideningType, "undefined");
         const nullType = createIntrinsicType(TypeFlags.Null, "null");
         const nullWideningType = strictNullChecks ? nullType : createIntrinsicType(TypeFlags.Null | TypeFlags.ContainsWideningType, "null");
-        const emptyArrayElementType = createIntrinsicType(TypeFlags.Undefined | TypeFlags.ContainsWideningType, "undefined");
         const unknownType = createIntrinsicType(TypeFlags.Any, "unknown");
         const neverType = createIntrinsicType(TypeFlags.Never, "never");
 

From d41ac8aa9a85203f413a52842975af4a4d4e09ec Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Thu, 2 Jun 2016 11:12:38 -0700
Subject: [PATCH 156/332] Add null check and CR feedback

---
 src/compiler/parser.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 13f16f3848a..e377f988d55 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -441,14 +441,14 @@ namespace ts {
     /* @internal */
     export function parseIsolatedJSDocComment(content: string, start?: number, length?: number) {
         const result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
-        if (result.jsDocComment) {
+        if (result && result.jsDocComment) {
             // because the jsDocComment was parsed out of the source file, it might
             // not be covered by the fixupParentReferences.
             let parentNode: Node = result.jsDocComment;
             forEachChild(result.jsDocComment, visitNode);
 
             function visitNode(n: Node): void {
-                if (n.parent !== parentNode) {
+                if (n.parent === undefined) {
                     n.parent = parentNode;
 
                     const saveParent = parentNode;

From 7e9cb46a1ace774a29b34b928db0fd46c72a9b99 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 2 Jun 2016 09:15:48 -0700
Subject: [PATCH 157/332] Support shorthand ambient module declarations

---
 src/compiler/binder.ts                        |  5 ++--
 src/compiler/checker.ts                       | 26 ++++++++++++++-----
 src/compiler/declarationEmitter.ts            | 25 +++++++++++-------
 src/compiler/emitter.ts                       |  3 ++-
 src/compiler/parser.ts                        |  9 ++++++-
 src/compiler/program.ts                       |  9 ++++---
 src/compiler/types.ts                         |  2 +-
 src/compiler/utilities.ts                     |  5 ++++
 src/services/navigationBar.ts                 | 10 ++++---
 src/services/services.ts                      |  2 +-
 tests/baselines/reference/ambientShorthand.js | 24 +++++++++++++++++
 .../reference/ambientShorthand.symbols        | 20 ++++++++++++++
 .../reference/ambientShorthand.types          | 21 +++++++++++++++
 .../ambientShorthand_declarationEmit.js       |  9 +++++++
 .../ambientShorthand_declarationEmit.symbols  |  4 +++
 .../ambientShorthand_declarationEmit.types    |  4 +++
 .../conformance/ambient/ambientShorthand.ts   | 10 +++++++
 .../ambientShorthand_declarationEmit.ts       |  2 ++
 18 files changed, 162 insertions(+), 28 deletions(-)
 create mode 100644 tests/baselines/reference/ambientShorthand.js
 create mode 100644 tests/baselines/reference/ambientShorthand.symbols
 create mode 100644 tests/baselines/reference/ambientShorthand.types
 create mode 100644 tests/baselines/reference/ambientShorthand_declarationEmit.js
 create mode 100644 tests/baselines/reference/ambientShorthand_declarationEmit.symbols
 create mode 100644 tests/baselines/reference/ambientShorthand_declarationEmit.types
 create mode 100644 tests/cases/conformance/ambient/ambientShorthand.ts
 create mode 100644 tests/cases/conformance/ambient/ambientShorthand_declarationEmit.ts

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 5fdfc7f02be..d6ede3049c2 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -53,7 +53,8 @@ namespace ts {
             return state;
         }
         else if (node.kind === SyntaxKind.ModuleDeclaration) {
-            return getModuleInstanceState((<ModuleDeclaration>node).body);
+            const body = (<ModuleDeclaration>node).body;
+            return body ? getModuleInstanceState(body) : ModuleInstanceState.NonInstantiated;
         }
         else {
             return ModuleInstanceState.Instantiated;
@@ -1256,7 +1257,7 @@ namespace ts {
 
         function hasExportDeclarations(node: ModuleDeclaration | SourceFile): boolean {
             const body = node.kind === SyntaxKind.SourceFile ? node : (<ModuleDeclaration>node).body;
-            if (body.kind === SyntaxKind.SourceFile || body.kind === SyntaxKind.ModuleBlock) {
+            if (body && (body.kind === SyntaxKind.SourceFile || body.kind === SyntaxKind.ModuleBlock)) {
                 for (const stat of (<Block>body).statements) {
                     if (stat.kind === SyntaxKind.ExportDeclaration || stat.kind === SyntaxKind.ExportAssignment) {
                         return true;
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 06ef2463402..50f1ce0d208 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -380,6 +380,7 @@ namespace ts {
         }
 
         function mergeSymbol(target: Symbol, source: Symbol) {
+            //TODO: how to merge w/ shorthand ambient module?
             if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
                 if (source.flags & SymbolFlags.ValueModule && target.flags & SymbolFlags.ValueModule && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
                     // reset flag when merging instantiated module into value module that has only const enums
@@ -986,7 +987,9 @@ namespace ts {
             const moduleSymbol = resolveExternalModuleName(node, (<ImportDeclaration>node.parent).moduleSpecifier);
 
             if (moduleSymbol) {
-                const exportDefaultSymbol = moduleSymbol.exports["export="] ?
+                const exportDefaultSymbol = isShorthandAmbientModule(moduleSymbol.valueDeclaration) ?
+                    moduleSymbol :
+                    moduleSymbol.exports["export="] ?
                     getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
                     resolveSymbol(moduleSymbol.exports["default"]);
 
@@ -1060,6 +1063,10 @@ namespace ts {
             if (targetSymbol) {
                 const name = specifier.propertyName || specifier.name;
                 if (name.text) {
+                    if (isShorthandAmbientModule(moduleSymbol.valueDeclaration)) {
+                        return moduleSymbol;
+                    }
+
                     let symbolFromVariable: Symbol;
                     // First check if module was specified with "export=". If so, get the member from the resolved type
                     if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
@@ -3220,9 +3227,14 @@ namespace ts {
         function getTypeOfFuncClassEnumModule(symbol: Symbol): Type {
             const links = getSymbolLinks(symbol);
             if (!links.type) {
-                const type = createObjectType(TypeFlags.Anonymous, symbol);
-                links.type = strictNullChecks && symbol.flags & SymbolFlags.Optional ?
-                    addNullableKind(type, TypeFlags.Undefined) : type;
+                if (symbol.valueDeclaration.kind === SyntaxKind.ModuleDeclaration && isShorthandAmbientModule(<ModuleDeclaration>symbol.valueDeclaration)) {
+                    links.type = anyType;
+                }
+                else {
+                    const type = createObjectType(TypeFlags.Anonymous, symbol);
+                    links.type = strictNullChecks && symbol.flags & SymbolFlags.Optional ?
+                        addNullableKind(type, TypeFlags.Undefined) : type;
+                }
             }
             return links.type;
         }
@@ -16010,7 +16022,7 @@ namespace ts {
                         // - augmentation for a global scope is always applied
                         // - augmentation for some external module is applied if symbol for augmentation is merged (it was combined with target module).
                         const checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & SymbolFlags.Merged);
-                        if (checkBody) {
+                        if (checkBody && node.body) {
                             // body of ambient external module is always a module block
                             for (const statement of (<ModuleBlock>node.body).statements) {
                                 checkModuleAugmentationElement(statement, isGlobalAugmentation);
@@ -16037,7 +16049,9 @@ namespace ts {
                     }
                 }
             }
-            checkSourceElement(node.body);
+            if (node.body) {
+                checkSourceElement(node.body);
+            }
         }
 
         function checkModuleAugmentationElement(node: Node, isGlobalAugmentation: boolean): void {
diff --git a/src/compiler/declarationEmitter.ts b/src/compiler/declarationEmitter.ts
index 397b135bf23..f44298a4206 100644
--- a/src/compiler/declarationEmitter.ts
+++ b/src/compiler/declarationEmitter.ts
@@ -853,21 +853,26 @@ namespace ts {
                     writeTextOfNode(currentText, node.name);
                 }
             }
-            while (node.body.kind !== SyntaxKind.ModuleBlock) {
+            while (node.body && node.body.kind !== SyntaxKind.ModuleBlock) {
                 node = <ModuleDeclaration>node.body;
                 write(".");
                 writeTextOfNode(currentText, node.name);
             }
             const prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines((<ModuleBlock>node.body).statements);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
+            if (node.body) {
+                enclosingDeclaration = node;
+                write(" {");
+                writeLine();
+                increaseIndent();
+                emitLines((<ModuleBlock>node.body).statements);
+                decreaseIndent();
+                write("}");
+                writeLine();
+                enclosingDeclaration = prevEnclosingDeclaration;
+            }
+            else {
+                write(";");
+            }
         }
 
         function writeTypeAliasDeclaration(node: TypeAliasDeclaration) {
diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index f225b4cacf8..88895531d16 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -6246,7 +6246,7 @@ const _super = (function (geti, seti) {
             }
 
             function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration: ModuleDeclaration): ModuleDeclaration {
-                if (moduleDeclaration.body.kind === SyntaxKind.ModuleDeclaration) {
+                if (moduleDeclaration.body && moduleDeclaration.body.kind === SyntaxKind.ModuleDeclaration) {
                     const recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(<ModuleDeclaration>moduleDeclaration.body);
                     return recursiveInnerModule || <ModuleDeclaration>moduleDeclaration.body;
                 }
@@ -6295,6 +6295,7 @@ const _super = (function (geti, seti) {
                 write(getGeneratedNameForNode(node));
                 emitEnd(node.name);
                 write(") ");
+                // node.body must exist, as this is a non-ambient module
                 if (node.body.kind === SyntaxKind.ModuleBlock) {
                     const saveConvertedLoopState = convertedLoopState;
                     const saveTempFlags = tempFlags;
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 6f042627c6b..8af258ebfc8 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -5330,7 +5330,14 @@ namespace ts {
             else {
                 node.name = parseLiteralNode(/*internName*/ true);
             }
-            node.body = parseModuleBlock();
+
+            if (token === SyntaxKind.OpenBraceToken) {
+                node.body = parseModuleBlock();
+            }
+            else {
+                parseSemicolon();
+            }
+
             return finishNode(node);
         }
 
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index bab554927e7..d94e25c786e 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -1712,9 +1712,12 @@ namespace ts {
                                 // The StringLiteral must specify a top - level external module name.
                                 // Relative external module names are not permitted
 
-                                // NOTE: body of ambient module is always a module block
-                                for (const statement of (<ModuleBlock>(<ModuleDeclaration>node).body).statements) {
-                                    collectModuleReferences(statement, /*inAmbientModule*/ true);
+                                // NOTE: body of ambient module is always a module block, if it exists
+                                const body = <ModuleBlock>(<ModuleDeclaration>node).body;
+                                if (body) {
+                                    for (const statement of body.statements) {
+                                        collectModuleReferences(statement, /*inAmbientModule*/ true);
+                                    }
                                 }
                             }
                         }
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index c7e14a10031..5f56c017c7e 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1301,7 +1301,7 @@ namespace ts {
     // @kind(SyntaxKind.ModuleDeclaration)
     export interface ModuleDeclaration extends DeclarationStatement {
         name: Identifier | LiteralExpression;
-        body: ModuleBlock | ModuleDeclaration;
+        body?: ModuleBlock | ModuleDeclaration;
     }
 
     // @kind(SyntaxKind.ModuleBlock)
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 74ea3459b23..56de65b5dc0 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -372,6 +372,11 @@ namespace ts {
             ((<ModuleDeclaration>node).name.kind === SyntaxKind.StringLiteral || isGlobalScopeAugmentation(<ModuleDeclaration>node));
     }
 
+    export function isShorthandAmbientModule(node: Node): boolean {
+        // The only kind of module that can be missing a body is a shorthand ambient module.
+        return node.kind === SyntaxKind.ModuleDeclaration && (!(<ModuleDeclaration>node).body);
+    }
+
     export function isBlockScopedContainerTopLevel(node: Node): boolean {
         return node.kind === SyntaxKind.SourceFile ||
             node.kind === SyntaxKind.ModuleDeclaration ||
diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index 92cf64eac94..59dc4a38283 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -188,7 +188,10 @@ namespace ts.NavigationBar {
                     case SyntaxKind.ModuleDeclaration:
                         let moduleDeclaration = <ModuleDeclaration>node;
                         topLevelNodes.push(node);
-                        addTopLevelNodes((<Block>getInnermostModule(moduleDeclaration).body).statements, topLevelNodes);
+                        const inner = getInnermostModule(moduleDeclaration);
+                        if (inner.body) {
+                            addTopLevelNodes((<Block>inner.body).statements, topLevelNodes);
+                        }
                         break;
 
                     case SyntaxKind.FunctionDeclaration:
@@ -453,7 +456,8 @@ namespace ts.NavigationBar {
             function createModuleItem(node: ModuleDeclaration): NavigationBarItem {
                 const moduleName = getModuleName(node);
 
-                const childItems = getItemsWorker(getChildNodes((<Block>getInnermostModule(node).body).statements), createChildItem);
+                const body = <Block>getInnermostModule(node).body;
+                const childItems = body ? getItemsWorker(getChildNodes(body.statements), createChildItem) : [];
 
                 return getNavigationBarItem(moduleName,
                     ts.ScriptElementKind.moduleElement,
@@ -611,7 +615,7 @@ namespace ts.NavigationBar {
         }
 
         function getInnermostModule(node: ModuleDeclaration): ModuleDeclaration {
-            while (node.body.kind === SyntaxKind.ModuleDeclaration) {
+            while (node.body && node.body.kind === SyntaxKind.ModuleDeclaration) {
                 node = <ModuleDeclaration>node.body;
             }
 
diff --git a/src/services/services.ts b/src/services/services.ts
index 90740b257c6..6bc40b80b31 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -415,7 +415,7 @@ namespace ts {
                     }
 
                     // If this is left side of dotted module declaration, there is no doc comments associated with this node
-                    if (declaration.kind === SyntaxKind.ModuleDeclaration && (<ModuleDeclaration>declaration).body.kind === SyntaxKind.ModuleDeclaration) {
+                    if (declaration.kind === SyntaxKind.ModuleDeclaration && (<ModuleDeclaration>declaration).body && (<ModuleDeclaration>declaration).body.kind === SyntaxKind.ModuleDeclaration) {
                         return;
                     }
 
diff --git a/tests/baselines/reference/ambientShorthand.js b/tests/baselines/reference/ambientShorthand.js
new file mode 100644
index 00000000000..76a3b482994
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand.js
@@ -0,0 +1,24 @@
+//// [tests/cases/conformance/ambient/ambientShorthand.ts] ////
+
+//// [declarations.d.ts]
+declare module "jquery"
+// Semicolon is optional
+declare module "fs";
+
+//// [user.ts]
+///<reference path="declarations.d.ts"/>
+import foo, {bar} from "jquery";
+import * as baz from "fs";
+foo(bar, baz);
+
+
+//// [user.js]
+"use strict";
+///<reference path="declarations.d.ts"/>
+var jquery_1 = require("jquery");
+var baz = require("fs");
+jquery_1["default"](jquery_1.bar, baz);
+
+
+//// [user.d.ts]
+/// <reference path="declarations.d.ts" />
diff --git a/tests/baselines/reference/ambientShorthand.symbols b/tests/baselines/reference/ambientShorthand.symbols
new file mode 100644
index 00000000000..91cefe8d4c4
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand.symbols
@@ -0,0 +1,20 @@
+=== tests/cases/conformance/ambient/user.ts ===
+///<reference path="declarations.d.ts"/>
+import foo, {bar} from "jquery";
+>foo : Symbol(foo, Decl(user.ts, 1, 6))
+>bar : Symbol(bar, Decl(user.ts, 1, 13))
+
+import * as baz from "fs";
+>baz : Symbol(baz, Decl(user.ts, 2, 6))
+
+foo(bar, baz);
+>foo : Symbol(foo, Decl(user.ts, 1, 6))
+>bar : Symbol(bar, Decl(user.ts, 1, 13))
+>baz : Symbol(baz, Decl(user.ts, 2, 6))
+
+=== tests/cases/conformance/ambient/declarations.d.ts ===
+declare module "jquery"
+No type information for this code.// Semicolon is optional
+No type information for this code.declare module "fs";
+No type information for this code.
+No type information for this code.
\ No newline at end of file
diff --git a/tests/baselines/reference/ambientShorthand.types b/tests/baselines/reference/ambientShorthand.types
new file mode 100644
index 00000000000..12b18953e88
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand.types
@@ -0,0 +1,21 @@
+=== tests/cases/conformance/ambient/user.ts ===
+///<reference path="declarations.d.ts"/>
+import foo, {bar} from "jquery";
+>foo : any
+>bar : any
+
+import * as baz from "fs";
+>baz : any
+
+foo(bar, baz);
+>foo(bar, baz) : any
+>foo : any
+>bar : any
+>baz : any
+
+=== tests/cases/conformance/ambient/declarations.d.ts ===
+declare module "jquery"
+No type information for this code.// Semicolon is optional
+No type information for this code.declare module "fs";
+No type information for this code.
+No type information for this code.
\ No newline at end of file
diff --git a/tests/baselines/reference/ambientShorthand_declarationEmit.js b/tests/baselines/reference/ambientShorthand_declarationEmit.js
new file mode 100644
index 00000000000..d758b57efd2
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_declarationEmit.js
@@ -0,0 +1,9 @@
+//// [ambientShorthand_declarationEmit.ts]
+declare module "foo";
+
+
+//// [ambientShorthand_declarationEmit.js]
+
+
+//// [ambientShorthand_declarationEmit.d.ts]
+declare module "foo";
\ No newline at end of file
diff --git a/tests/baselines/reference/ambientShorthand_declarationEmit.symbols b/tests/baselines/reference/ambientShorthand_declarationEmit.symbols
new file mode 100644
index 00000000000..f1b3284b0f2
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_declarationEmit.symbols
@@ -0,0 +1,4 @@
+=== tests/cases/conformance/ambient/ambientShorthand_declarationEmit.ts ===
+declare module "foo";
+No type information for this code.
+No type information for this code.
\ No newline at end of file
diff --git a/tests/baselines/reference/ambientShorthand_declarationEmit.types b/tests/baselines/reference/ambientShorthand_declarationEmit.types
new file mode 100644
index 00000000000..f1b3284b0f2
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_declarationEmit.types
@@ -0,0 +1,4 @@
+=== tests/cases/conformance/ambient/ambientShorthand_declarationEmit.ts ===
+declare module "foo";
+No type information for this code.
+No type information for this code.
\ No newline at end of file
diff --git a/tests/cases/conformance/ambient/ambientShorthand.ts b/tests/cases/conformance/ambient/ambientShorthand.ts
new file mode 100644
index 00000000000..3070abff595
--- /dev/null
+++ b/tests/cases/conformance/ambient/ambientShorthand.ts
@@ -0,0 +1,10 @@
+// @Filename: declarations.d.ts
+declare module "jquery"
+// Semicolon is optional
+declare module "fs";
+
+// @Filename: user.ts
+///<reference path="declarations.d.ts"/>
+import foo, {bar} from "jquery";
+import * as baz from "fs";
+foo(bar, baz);
diff --git a/tests/cases/conformance/ambient/ambientShorthand_declarationEmit.ts b/tests/cases/conformance/ambient/ambientShorthand_declarationEmit.ts
new file mode 100644
index 00000000000..13053868e5b
--- /dev/null
+++ b/tests/cases/conformance/ambient/ambientShorthand_declarationEmit.ts
@@ -0,0 +1,2 @@
+// @declaration: true
+declare module "foo";

From fc3e040c5167868ed623612e8f33fb3beedf73b1 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Thu, 2 Jun 2016 12:57:24 -0700
Subject: [PATCH 158/332] Revert "Merge pull request #7235 from
 weswigham/narrow-all-types"

This reverts commit ef0f6c8fe4f94a7e294cfe42d7025c9dca6535d5, reversing
changes made to 9f087cb62ade7a879e23c229df752fc8f87d679c.
---
 src/compiler/checker.ts                       |  2 +-
 src/compiler/types.ts                         |  8 +-
 .../typeGuardNarrowsPrimitiveIntersection.js  | 38 ----------
 ...eGuardNarrowsPrimitiveIntersection.symbols | 70 -----------------
 ...ypeGuardNarrowsPrimitiveIntersection.types | 76 -------------------
 .../typeGuardNarrowsToLiteralType.js          | 21 -----
 .../typeGuardNarrowsToLiteralType.symbols     | 32 --------
 .../typeGuardNarrowsToLiteralType.types       | 35 ---------
 .../typeGuardNarrowsToLiteralTypeUnion.js     | 21 -----
 ...typeGuardNarrowsToLiteralTypeUnion.symbols | 32 --------
 .../typeGuardNarrowsToLiteralTypeUnion.types  | 35 ---------
 .../typeGuardNarrowsPrimitiveIntersection.ts  | 21 -----
 .../typeGuardNarrowsToLiteralType.ts          | 10 ---
 .../typeGuardNarrowsToLiteralTypeUnion.ts     | 10 ---
 14 files changed, 2 insertions(+), 409 deletions(-)
 delete mode 100644 tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.js
 delete mode 100644 tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.symbols
 delete mode 100644 tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.types
 delete mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralType.js
 delete mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralType.symbols
 delete mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralType.types
 delete mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.js
 delete mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.symbols
 delete mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.types
 delete mode 100644 tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts
 delete mode 100644 tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts
 delete mode 100644 tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index ef11dc904ea..06ef2463402 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7662,7 +7662,7 @@ namespace ts {
 
         function getFlowTypeOfReference(reference: Node, declaredType: Type, assumeInitialized: boolean, includeOuterFunctions: boolean) {
             let key: string;
-            if (!reference.flowNode || assumeInitialized && (declaredType.flags & TypeFlags.NotNarrowable)) {
+            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & TypeFlags.Narrowable)) {
                 return declaredType;
             }
             const initialType = assumeInitialized ? declaredType : addNullableKind(declaredType, TypeFlags.Undefined);
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 026ee5da960..c7e14a10031 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2218,13 +2218,7 @@ namespace ts {
         ObjectType = Class | Interface | Reference | Tuple | Anonymous,
         UnionOrIntersection = Union | Intersection,
         StructuredType = ObjectType | Union | Intersection,
-
-        // 'NotNarrowable' types are types where narrowing reverts to the original type, rather than actually narrow.
-        // This is never really correct - you can _always_ narrow to an intersection with that type, _but_ we keep
-        // Void as the only non-narrowable type, since it's a non-value type construct (representing a lack of a value)
-        // and, generally speaking, narrowing `void` should fail in some way, as it is nonsensical. (`void` narrowing
-        // to `void & T`, in a structural sense, is just narrowing to T, which we wouldn't allow under normal rules)
-        NotNarrowable = Void,
+        Narrowable = Any | ObjectType | Union | TypeParameter,
         /* @internal */
         RequiresWidening = ContainsUndefinedOrNull | ContainsObjectLiteral,
         /* @internal */
diff --git a/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.js b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.js
deleted file mode 100644
index a4cba6f4ab5..00000000000
--- a/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.js
+++ /dev/null
@@ -1,38 +0,0 @@
-//// [typeGuardNarrowsPrimitiveIntersection.ts]
-type Tag = {__tag: any};
-declare function isNonBlank(value: string) : value is (string & Tag);
-declare function doThis(value: string & Tag): void;
-declare function doThat(value: string) : void;
-let value: string;
-if (isNonBlank(value)) {
-    doThis(value);
-} else {
-    doThat(value);
-}
-
-
-const enum Tag2 {}
-declare function isNonBlank2(value: string) : value is (string & Tag2);
-declare function doThis2(value: string & Tag2): void;
-declare function doThat2(value: string) : void;
-if (isNonBlank2(value)) {
-    doThis2(value);
-} else {
-    doThat2(value);
-}
-
-
-//// [typeGuardNarrowsPrimitiveIntersection.js]
-var value;
-if (isNonBlank(value)) {
-    doThis(value);
-}
-else {
-    doThat(value);
-}
-if (isNonBlank2(value)) {
-    doThis2(value);
-}
-else {
-    doThat2(value);
-}
diff --git a/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.symbols b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.symbols
deleted file mode 100644
index da507fb94c5..00000000000
--- a/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.symbols
+++ /dev/null
@@ -1,70 +0,0 @@
-=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts ===
-type Tag = {__tag: any};
->Tag : Symbol(Tag, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 0))
->__tag : Symbol(__tag, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 12))
-
-declare function isNonBlank(value: string) : value is (string & Tag);
->isNonBlank : Symbol(isNonBlank, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 24))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 1, 28))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 1, 28))
->Tag : Symbol(Tag, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 0))
-
-declare function doThis(value: string & Tag): void;
->doThis : Symbol(doThis, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 1, 69))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 2, 24))
->Tag : Symbol(Tag, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 0))
-
-declare function doThat(value: string) : void;
->doThat : Symbol(doThat, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 2, 51))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 3, 24))
-
-let value: string;
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
-
-if (isNonBlank(value)) {
->isNonBlank : Symbol(isNonBlank, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 24))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
-
-    doThis(value);
->doThis : Symbol(doThis, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 1, 69))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
-
-} else {
-    doThat(value);
->doThat : Symbol(doThat, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 2, 51))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
-}
-
-
-const enum Tag2 {}
->Tag2 : Symbol(Tag2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 9, 1))
-
-declare function isNonBlank2(value: string) : value is (string & Tag2);
->isNonBlank2 : Symbol(isNonBlank2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 12, 18))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 13, 29))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 13, 29))
->Tag2 : Symbol(Tag2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 9, 1))
-
-declare function doThis2(value: string & Tag2): void;
->doThis2 : Symbol(doThis2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 13, 71))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 14, 25))
->Tag2 : Symbol(Tag2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 9, 1))
-
-declare function doThat2(value: string) : void;
->doThat2 : Symbol(doThat2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 14, 53))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 15, 25))
-
-if (isNonBlank2(value)) {
->isNonBlank2 : Symbol(isNonBlank2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 12, 18))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
-
-    doThis2(value);
->doThis2 : Symbol(doThis2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 13, 71))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
-
-} else {
-    doThat2(value);
->doThat2 : Symbol(doThat2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 14, 53))
->value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
-}
-
diff --git a/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.types b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.types
deleted file mode 100644
index 478363669b4..00000000000
--- a/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.types
+++ /dev/null
@@ -1,76 +0,0 @@
-=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts ===
-type Tag = {__tag: any};
->Tag : { __tag: any; }
->__tag : any
-
-declare function isNonBlank(value: string) : value is (string & Tag);
->isNonBlank : (value: string) => value is string & { __tag: any; }
->value : string
->value : any
->Tag : { __tag: any; }
-
-declare function doThis(value: string & Tag): void;
->doThis : (value: string & { __tag: any; }) => void
->value : string & { __tag: any; }
->Tag : { __tag: any; }
-
-declare function doThat(value: string) : void;
->doThat : (value: string) => void
->value : string
-
-let value: string;
->value : string
-
-if (isNonBlank(value)) {
->isNonBlank(value) : boolean
->isNonBlank : (value: string) => value is string & { __tag: any; }
->value : string
-
-    doThis(value);
->doThis(value) : void
->doThis : (value: string & { __tag: any; }) => void
->value : string & { __tag: any; }
-
-} else {
-    doThat(value);
->doThat(value) : void
->doThat : (value: string) => void
->value : string
-}
-
-
-const enum Tag2 {}
->Tag2 : Tag2
-
-declare function isNonBlank2(value: string) : value is (string & Tag2);
->isNonBlank2 : (value: string) => value is string & Tag2
->value : string
->value : any
->Tag2 : Tag2
-
-declare function doThis2(value: string & Tag2): void;
->doThis2 : (value: string & Tag2) => void
->value : string & Tag2
->Tag2 : Tag2
-
-declare function doThat2(value: string) : void;
->doThat2 : (value: string) => void
->value : string
-
-if (isNonBlank2(value)) {
->isNonBlank2(value) : boolean
->isNonBlank2 : (value: string) => value is string & Tag2
->value : string
-
-    doThis2(value);
->doThis2(value) : void
->doThis2 : (value: string & Tag2) => void
->value : string & Tag2
-
-} else {
-    doThat2(value);
->doThat2(value) : void
->doThat2 : (value: string) => void
->value : string
-}
-
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralType.js b/tests/baselines/reference/typeGuardNarrowsToLiteralType.js
deleted file mode 100644
index fdd2ee3fb7f..00000000000
--- a/tests/baselines/reference/typeGuardNarrowsToLiteralType.js
+++ /dev/null
@@ -1,21 +0,0 @@
-//// [typeGuardNarrowsToLiteralType.ts]
-declare function isFoo(value: string) : value is "foo";
-declare function doThis(value: "foo"): void;
-declare function doThat(value: string) : void;
-let value: string;
-if (isFoo(value)) {
-    doThis(value);
-} else {
-    doThat(value);
-}
-
-
-
-//// [typeGuardNarrowsToLiteralType.js]
-var value;
-if (isFoo(value)) {
-    doThis(value);
-}
-else {
-    doThat(value);
-}
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralType.symbols b/tests/baselines/reference/typeGuardNarrowsToLiteralType.symbols
deleted file mode 100644
index 0d0ddc5f00d..00000000000
--- a/tests/baselines/reference/typeGuardNarrowsToLiteralType.symbols
+++ /dev/null
@@ -1,32 +0,0 @@
-=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts ===
-declare function isFoo(value: string) : value is "foo";
->isFoo : Symbol(isFoo, Decl(typeGuardNarrowsToLiteralType.ts, 0, 0))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 0, 23))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 0, 23))
-
-declare function doThis(value: "foo"): void;
->doThis : Symbol(doThis, Decl(typeGuardNarrowsToLiteralType.ts, 0, 55))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 1, 24))
-
-declare function doThat(value: string) : void;
->doThat : Symbol(doThat, Decl(typeGuardNarrowsToLiteralType.ts, 1, 44))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 2, 24))
-
-let value: string;
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 3, 3))
-
-if (isFoo(value)) {
->isFoo : Symbol(isFoo, Decl(typeGuardNarrowsToLiteralType.ts, 0, 0))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 3, 3))
-
-    doThis(value);
->doThis : Symbol(doThis, Decl(typeGuardNarrowsToLiteralType.ts, 0, 55))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 3, 3))
-
-} else {
-    doThat(value);
->doThat : Symbol(doThat, Decl(typeGuardNarrowsToLiteralType.ts, 1, 44))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 3, 3))
-}
-
-
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralType.types b/tests/baselines/reference/typeGuardNarrowsToLiteralType.types
deleted file mode 100644
index 9835206deb9..00000000000
--- a/tests/baselines/reference/typeGuardNarrowsToLiteralType.types
+++ /dev/null
@@ -1,35 +0,0 @@
-=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts ===
-declare function isFoo(value: string) : value is "foo";
->isFoo : (value: string) => value is "foo"
->value : string
->value : any
-
-declare function doThis(value: "foo"): void;
->doThis : (value: "foo") => void
->value : "foo"
-
-declare function doThat(value: string) : void;
->doThat : (value: string) => void
->value : string
-
-let value: string;
->value : string
-
-if (isFoo(value)) {
->isFoo(value) : boolean
->isFoo : (value: string) => value is "foo"
->value : string
-
-    doThis(value);
->doThis(value) : void
->doThis : (value: "foo") => void
->value : "foo"
-
-} else {
-    doThat(value);
->doThat(value) : void
->doThat : (value: string) => void
->value : string
-}
-
-
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.js b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.js
deleted file mode 100644
index 715b362c8e0..00000000000
--- a/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.js
+++ /dev/null
@@ -1,21 +0,0 @@
-//// [typeGuardNarrowsToLiteralTypeUnion.ts]
-declare function isFoo(value: string) : value is ("foo" | "bar");
-declare function doThis(value: "foo" | "bar"): void;
-declare function doThat(value: string) : void;
-let value: string;
-if (isFoo(value)) {
-    doThis(value);
-} else {
-    doThat(value);
-}
-
-
-
-//// [typeGuardNarrowsToLiteralTypeUnion.js]
-var value;
-if (isFoo(value)) {
-    doThis(value);
-}
-else {
-    doThat(value);
-}
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.symbols b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.symbols
deleted file mode 100644
index 356fa06a06c..00000000000
--- a/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.symbols
+++ /dev/null
@@ -1,32 +0,0 @@
-=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts ===
-declare function isFoo(value: string) : value is ("foo" | "bar");
->isFoo : Symbol(isFoo, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 0))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 23))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 23))
-
-declare function doThis(value: "foo" | "bar"): void;
->doThis : Symbol(doThis, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 65))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 1, 24))
-
-declare function doThat(value: string) : void;
->doThat : Symbol(doThat, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 1, 52))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 2, 24))
-
-let value: string;
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 3, 3))
-
-if (isFoo(value)) {
->isFoo : Symbol(isFoo, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 0))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 3, 3))
-
-    doThis(value);
->doThis : Symbol(doThis, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 65))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 3, 3))
-
-} else {
-    doThat(value);
->doThat : Symbol(doThat, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 1, 52))
->value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 3, 3))
-}
-
-
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.types b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.types
deleted file mode 100644
index 321a8861d55..00000000000
--- a/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.types
+++ /dev/null
@@ -1,35 +0,0 @@
-=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts ===
-declare function isFoo(value: string) : value is ("foo" | "bar");
->isFoo : (value: string) => value is "foo" | "bar"
->value : string
->value : any
-
-declare function doThis(value: "foo" | "bar"): void;
->doThis : (value: "foo" | "bar") => void
->value : "foo" | "bar"
-
-declare function doThat(value: string) : void;
->doThat : (value: string) => void
->value : string
-
-let value: string;
->value : string
-
-if (isFoo(value)) {
->isFoo(value) : boolean
->isFoo : (value: string) => value is "foo" | "bar"
->value : string
-
-    doThis(value);
->doThis(value) : void
->doThis : (value: "foo" | "bar") => void
->value : "foo" | "bar"
-
-} else {
-    doThat(value);
->doThat(value) : void
->doThat : (value: string) => void
->value : string
-}
-
-
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts
deleted file mode 100644
index 376a78275c8..00000000000
--- a/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts
+++ /dev/null
@@ -1,21 +0,0 @@
-type Tag = {__tag: any};
-declare function isNonBlank(value: string) : value is (string & Tag);
-declare function doThis(value: string & Tag): void;
-declare function doThat(value: string) : void;
-let value: string;
-if (isNonBlank(value)) {
-    doThis(value);
-} else {
-    doThat(value);
-}
-
-
-const enum Tag2 {}
-declare function isNonBlank2(value: string) : value is (string & Tag2);
-declare function doThis2(value: string & Tag2): void;
-declare function doThat2(value: string) : void;
-if (isNonBlank2(value)) {
-    doThis2(value);
-} else {
-    doThat2(value);
-}
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts
deleted file mode 100644
index 3b7d5bba21a..00000000000
--- a/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-declare function isFoo(value: string) : value is "foo";
-declare function doThis(value: "foo"): void;
-declare function doThat(value: string) : void;
-let value: string;
-if (isFoo(value)) {
-    doThis(value);
-} else {
-    doThat(value);
-}
-
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts
deleted file mode 100644
index 8f4726160f4..00000000000
--- a/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts
+++ /dev/null
@@ -1,10 +0,0 @@
-declare function isFoo(value: string) : value is ("foo" | "bar");
-declare function doThis(value: "foo" | "bar"): void;
-declare function doThat(value: string) : void;
-let value: string;
-if (isFoo(value)) {
-    doThis(value);
-} else {
-    doThat(value);
-}
-

From e2a1a78dd30ea9f025b3990b73d68ecbb3eec160 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Thu, 2 Jun 2016 13:26:15 -0700
Subject: [PATCH 159/332] reuse the fixupParentReferences function

---
 src/compiler/parser.ts | 20 ++++----------------
 1 file changed, 4 insertions(+), 16 deletions(-)

diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index e377f988d55..b24dd85f2f0 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -444,19 +444,7 @@ namespace ts {
         if (result && result.jsDocComment) {
             // because the jsDocComment was parsed out of the source file, it might
             // not be covered by the fixupParentReferences.
-            let parentNode: Node = result.jsDocComment;
-            forEachChild(result.jsDocComment, visitNode);
-
-            function visitNode(n: Node): void {
-                if (n.parent === undefined) {
-                    n.parent = parentNode;
-
-                    const saveParent = parentNode;
-                    parentNode = n;
-                    forEachChild(n, visitNode);
-                    parentNode = saveParent;
-                }
-            }
+            Parser.fixupParentReferences(result.jsDocComment);
         }
 
         return result;
@@ -671,14 +659,14 @@ namespace ts {
             return node;
         }
 
-        export function fixupParentReferences(sourceFile: Node) {
+        export function fixupParentReferences(rootNode: Node) {
             // normally parent references are set during binding. However, for clients that only need
             // a syntax tree, and no semantic features, then the binding process is an unnecessary
             // overhead.  This functions allows us to set all the parents, without all the expense of
             // binding.
 
-            let parent: Node = sourceFile;
-            forEachChild(sourceFile, visitNode);
+            let parent: Node = rootNode;
+            forEachChild(rootNode, visitNode);
             return;
 
             function visitNode(n: Node): void {

From bcc9220451f7af0b8700b1255bead698e26cf7ca Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 2 Jun 2016 17:37:14 -0700
Subject: [PATCH 160/332] Improve typing of && operator with --strictNullChecks

---
 src/compiler/checker.ts | 50 ++++++++++++++++++-----------------------
 src/compiler/types.ts   |  1 +
 2 files changed, 23 insertions(+), 28 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index b8f078ea9a5..66e49ffff13 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -2844,7 +2844,7 @@ namespace ts {
             }
             // In strict null checking mode, if a default value of a non-undefined type is specified, remove
             // undefined from the final type.
-            if (strictNullChecks && declaration.initializer && !(getNullableKind(checkExpressionCached(declaration.initializer)) & TypeFlags.Undefined)) {
+            if (strictNullChecks && declaration.initializer && !(getCombinedTypeFlags(checkExpressionCached(declaration.initializer)) & TypeFlags.Undefined)) {
                 type = getTypeWithFacts(type, TypeFacts.NEUndefined);
             }
             return type;
@@ -2887,7 +2887,7 @@ namespace ts {
         }
 
         function addOptionality(type: Type, optional: boolean): Type {
-            return strictNullChecks && optional ? addNullableKind(type, TypeFlags.Undefined) : type;
+            return strictNullChecks && optional ? addTypeKind(type, TypeFlags.Undefined) : type;
         }
 
         // Return the inferred type for a variable, parameter, or property declaration
@@ -3222,7 +3222,7 @@ namespace ts {
             if (!links.type) {
                 const type = createObjectType(TypeFlags.Anonymous, symbol);
                 links.type = strictNullChecks && symbol.flags & SymbolFlags.Optional ?
-                    addNullableKind(type, TypeFlags.Undefined) : type;
+                    addTypeKind(type, TypeFlags.Undefined) : type;
             }
             return links.type;
         }
@@ -6746,7 +6746,7 @@ namespace ts {
                 return getUnionType(types);
             }
             const supertype = forEach(primaryTypes, t => isSupertypeOfEach(t, primaryTypes) ? t : undefined);
-            return supertype && addNullableKind(supertype, getCombinedFlagsOfTypes(types) & TypeFlags.Nullable);
+            return supertype && addTypeKind(supertype, getCombinedFlagsOfTypes(types) & TypeFlags.Nullable);
         }
 
         function reportNoCommonSupertypeError(types: Type[], errorLocation: Node, errorMessageChainHead: DiagnosticMessageChain): void {
@@ -6817,28 +6817,22 @@ namespace ts {
             return !!(type.flags & TypeFlags.Tuple);
         }
 
-        function getNullableKind(type: Type): TypeFlags {
-            let flags = type.flags;
-            if (flags & TypeFlags.Union) {
-                for (const t of (type as UnionType).types) {
-                    flags |= t.flags;
-                }
-            }
-            return flags & TypeFlags.Nullable;
+        function getCombinedTypeFlags(type: Type): TypeFlags {
+            return type.flags & TypeFlags.Union ? getCombinedFlagsOfTypes((<UnionType>type).types) : type.flags;
         }
 
-        function addNullableKind(type: Type, kind: TypeFlags): Type {
-            if ((getNullableKind(type) & kind) !== kind) {
-                const types = [type];
-                if (kind & TypeFlags.Undefined) {
-                    types.push(undefinedType);
-                }
-                if (kind & TypeFlags.Null) {
-                    types.push(nullType);
-                }
-                type = getUnionType(types);
+        function addTypeKind(type: Type, kind: TypeFlags) {
+            if ((getCombinedTypeFlags(type) & kind) === kind) {
+                return type;
             }
-            return type;
+            const types = [type];
+            if (kind & TypeFlags.String) types.push(stringType);
+            if (kind & TypeFlags.Number) types.push(numberType);
+            if (kind & TypeFlags.Boolean) types.push(booleanType);
+            if (kind & TypeFlags.Void) types.push(voidType);
+            if (kind & TypeFlags.Undefined) types.push(undefinedType);
+            if (kind & TypeFlags.Null) types.push(nullType);
+            return getUnionType(types);
         }
 
         function getNonNullableType(type: Type): Type {
@@ -7667,7 +7661,7 @@ namespace ts {
             if (!reference.flowNode || assumeInitialized && !(declaredType.flags & TypeFlags.Narrowable)) {
                 return declaredType;
             }
-            const initialType = assumeInitialized ? declaredType : addNullableKind(declaredType, TypeFlags.Undefined);
+            const initialType = assumeInitialized ? declaredType : addTypeKind(declaredType, TypeFlags.Undefined);
             const visitedFlowStart = visitedFlowCount;
             const result = getTypeAtFlowNode(reference.flowNode);
             visitedFlowCount = visitedFlowStart;
@@ -8163,7 +8157,7 @@ namespace ts {
                 getRootDeclaration(declaration).kind === SyntaxKind.Parameter || isInAmbientContext(declaration) ||
                 !isDeclarationIncludedInFlow(node, declaration, includeOuterFunctions);
             const flowType = getFlowTypeOfReference(node, type, assumeInitialized, includeOuterFunctions);
-            if (!assumeInitialized && !(getNullableKind(type) & TypeFlags.Undefined) && getNullableKind(flowType) & TypeFlags.Undefined) {
+            if (!assumeInitialized && !(getCombinedTypeFlags(type) & TypeFlags.Undefined) && getCombinedTypeFlags(flowType) & TypeFlags.Undefined) {
                 error(node, Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
                 // Return the declared type to reduce follow-on errors
                 return type;
@@ -9945,7 +9939,7 @@ namespace ts {
         function checkNonNullExpression(node: Expression | QualifiedName) {
             const type = checkExpression(node);
             if (strictNullChecks) {
-                const kind = getNullableKind(type);
+                const kind = getCombinedTypeFlags(type) & TypeFlags.Nullable;
                 if (kind) {
                     error(node, kind & TypeFlags.Undefined ? kind & TypeFlags.Null ?
                         Diagnostics.Object_is_possibly_null_or_undefined :
@@ -11485,7 +11479,7 @@ namespace ts {
             if (strictNullChecks) {
                 const declaration = symbol.valueDeclaration;
                 if (declaration && (<VariableLikeDeclaration>declaration).initializer) {
-                    return addNullableKind(type, TypeFlags.Undefined);
+                    return addTypeKind(type, TypeFlags.Undefined);
                 }
             }
             return type;
@@ -12411,7 +12405,7 @@ namespace ts {
                 case SyntaxKind.InKeyword:
                     return checkInExpression(left, right, leftType, rightType);
                 case SyntaxKind.AmpersandAmpersandToken:
-                    return strictNullChecks ? addNullableKind(rightType, getNullableKind(leftType)) : rightType;
+                    return strictNullChecks ? addTypeKind(rightType, getCombinedTypeFlags(leftType) & TypeFlags.Falsy) : rightType;
                 case SyntaxKind.BarBarToken:
                     return getUnionType([getNonNullableType(leftType), rightType]);
                 case SyntaxKind.EqualsToken:
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 4c0e7a036db..3e8c2378b4c 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2209,6 +2209,7 @@ namespace ts {
 
         /* @internal */
         Nullable = Undefined | Null,
+        Falsy = String | Number | Boolean | Void | Undefined | Null,
         /* @internal */
         Intrinsic = Any | String | Number | Boolean | ESSymbol | Void | Undefined | Null | Never,
         /* @internal */

From 13698a99525782f9b2cd80b4a9bed5e20f6759b7 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Thu, 2 Jun 2016 17:37:25 -0700
Subject: [PATCH 161/332] Add test

---
 .../reference/logicalAndOperatorStrictMode.js | 156 +++++++
 .../logicalAndOperatorStrictMode.symbols      | 351 +++++++++++++++
 .../logicalAndOperatorStrictMode.types        | 423 ++++++++++++++++++
 .../logicalAndOperatorStrictMode.ts           |  82 ++++
 4 files changed, 1012 insertions(+)
 create mode 100644 tests/baselines/reference/logicalAndOperatorStrictMode.js
 create mode 100644 tests/baselines/reference/logicalAndOperatorStrictMode.symbols
 create mode 100644 tests/baselines/reference/logicalAndOperatorStrictMode.types
 create mode 100644 tests/cases/conformance/expressions/binaryOperators/logicalAndOperator/logicalAndOperatorStrictMode.ts

diff --git a/tests/baselines/reference/logicalAndOperatorStrictMode.js b/tests/baselines/reference/logicalAndOperatorStrictMode.js
new file mode 100644
index 00000000000..ecb5bc16429
--- /dev/null
+++ b/tests/baselines/reference/logicalAndOperatorStrictMode.js
@@ -0,0 +1,156 @@
+//// [logicalAndOperatorStrictMode.ts]
+
+const a = [0];
+const s = "";
+const x = 0;
+const b = false;
+const v: void = undefined;
+const u = undefined;
+const n = null;
+const z = s || x || u;
+
+const a1 = a && a;
+const a2 = a && s;
+const a3 = a && x;
+const a4 = a && b;
+const a5 = a && v;
+const a6 = a && u;
+const a7 = a && n;
+const a8 = a && z;
+
+const s1 = s && a;
+const s2 = s && s;
+const s3 = s && x;
+const s4 = s && b;
+const s5 = s && v;
+const s6 = s && u;
+const s7 = s && n;
+const s8 = s && z;
+
+const x1 = x && a;
+const x2 = x && s;
+const x3 = x && x;
+const x4 = x && b;
+const x5 = x && v;
+const x6 = x && u;
+const x7 = x && n;
+const x8 = x && z;
+
+const b1 = b && a;
+const b2 = b && s;
+const b3 = b && x;
+const b4 = b && b;
+const b5 = b && v;
+const b6 = b && u;
+const b7 = b && n;
+const b8 = b && z;
+
+const v1 = v && a;
+const v2 = v && s;
+const v3 = v && x;
+const v4 = v && b;
+const v5 = v && v;
+const v6 = v && u;
+const v7 = v && n;
+const v8 = v && z;
+
+const u1 = u && a;
+const u2 = u && s;
+const u3 = u && x;
+const u4 = u && b;
+const u5 = u && v;
+const u6 = u && u;
+const u7 = u && n;
+const u8 = u && z;
+
+const n1 = n && a;
+const n2 = n && s;
+const n3 = n && x;
+const n4 = n && b;
+const n5 = n && v;
+const n6 = n && u;
+const n7 = n && n;
+const n8 = n && z;
+
+const z1 = z && a;
+const z2 = z && s;
+const z3 = z && x;
+const z4 = z && b;
+const z5 = z && v;
+const z6 = z && u;
+const z7 = z && n;
+const z8 = z && z;
+
+//// [logicalAndOperatorStrictMode.js]
+var a = [0];
+var s = "";
+var x = 0;
+var b = false;
+var v = undefined;
+var u = undefined;
+var n = null;
+var z = s || x || u;
+var a1 = a && a;
+var a2 = a && s;
+var a3 = a && x;
+var a4 = a && b;
+var a5 = a && v;
+var a6 = a && u;
+var a7 = a && n;
+var a8 = a && z;
+var s1 = s && a;
+var s2 = s && s;
+var s3 = s && x;
+var s4 = s && b;
+var s5 = s && v;
+var s6 = s && u;
+var s7 = s && n;
+var s8 = s && z;
+var x1 = x && a;
+var x2 = x && s;
+var x3 = x && x;
+var x4 = x && b;
+var x5 = x && v;
+var x6 = x && u;
+var x7 = x && n;
+var x8 = x && z;
+var b1 = b && a;
+var b2 = b && s;
+var b3 = b && x;
+var b4 = b && b;
+var b5 = b && v;
+var b6 = b && u;
+var b7 = b && n;
+var b8 = b && z;
+var v1 = v && a;
+var v2 = v && s;
+var v3 = v && x;
+var v4 = v && b;
+var v5 = v && v;
+var v6 = v && u;
+var v7 = v && n;
+var v8 = v && z;
+var u1 = u && a;
+var u2 = u && s;
+var u3 = u && x;
+var u4 = u && b;
+var u5 = u && v;
+var u6 = u && u;
+var u7 = u && n;
+var u8 = u && z;
+var n1 = n && a;
+var n2 = n && s;
+var n3 = n && x;
+var n4 = n && b;
+var n5 = n && v;
+var n6 = n && u;
+var n7 = n && n;
+var n8 = n && z;
+var z1 = z && a;
+var z2 = z && s;
+var z3 = z && x;
+var z4 = z && b;
+var z5 = z && v;
+var z6 = z && u;
+var z7 = z && n;
+var z8 = z && z;
diff --git a/tests/baselines/reference/logicalAndOperatorStrictMode.symbols b/tests/baselines/reference/logicalAndOperatorStrictMode.symbols
new file mode 100644
index 00000000000..e3425a26149
--- /dev/null
+++ b/tests/baselines/reference/logicalAndOperatorStrictMode.symbols
@@ -0,0 +1,351 @@
+=== tests/cases/conformance/expressions/binaryOperators/logicalAndOperator/logicalAndOperatorStrictMode.ts ===
+
+const a = [0];
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+
+const s = "";
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+
+const x = 0;
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+
+const b = false;
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+
+const v: void = undefined;
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+>undefined : Symbol(undefined)
+
+const u = undefined;
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+>undefined : Symbol(undefined)
+
+const n = null;
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+
+const z = s || x || u;
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+
+const a1 = a && a;
+>a1 : Symbol(a1, Decl(logicalAndOperatorStrictMode.ts, 10, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+
+const a2 = a && s;
+>a2 : Symbol(a2, Decl(logicalAndOperatorStrictMode.ts, 11, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+
+const a3 = a && x;
+>a3 : Symbol(a3, Decl(logicalAndOperatorStrictMode.ts, 12, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+
+const a4 = a && b;
+>a4 : Symbol(a4, Decl(logicalAndOperatorStrictMode.ts, 13, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+
+const a5 = a && v;
+>a5 : Symbol(a5, Decl(logicalAndOperatorStrictMode.ts, 14, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+
+const a6 = a && u;
+>a6 : Symbol(a6, Decl(logicalAndOperatorStrictMode.ts, 15, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+
+const a7 = a && n;
+>a7 : Symbol(a7, Decl(logicalAndOperatorStrictMode.ts, 16, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+
+const a8 = a && z;
+>a8 : Symbol(a8, Decl(logicalAndOperatorStrictMode.ts, 17, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+
+const s1 = s && a;
+>s1 : Symbol(s1, Decl(logicalAndOperatorStrictMode.ts, 19, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+
+const s2 = s && s;
+>s2 : Symbol(s2, Decl(logicalAndOperatorStrictMode.ts, 20, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+
+const s3 = s && x;
+>s3 : Symbol(s3, Decl(logicalAndOperatorStrictMode.ts, 21, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+
+const s4 = s && b;
+>s4 : Symbol(s4, Decl(logicalAndOperatorStrictMode.ts, 22, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+
+const s5 = s && v;
+>s5 : Symbol(s5, Decl(logicalAndOperatorStrictMode.ts, 23, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+
+const s6 = s && u;
+>s6 : Symbol(s6, Decl(logicalAndOperatorStrictMode.ts, 24, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+
+const s7 = s && n;
+>s7 : Symbol(s7, Decl(logicalAndOperatorStrictMode.ts, 25, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+
+const s8 = s && z;
+>s8 : Symbol(s8, Decl(logicalAndOperatorStrictMode.ts, 26, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+
+const x1 = x && a;
+>x1 : Symbol(x1, Decl(logicalAndOperatorStrictMode.ts, 28, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+
+const x2 = x && s;
+>x2 : Symbol(x2, Decl(logicalAndOperatorStrictMode.ts, 29, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+
+const x3 = x && x;
+>x3 : Symbol(x3, Decl(logicalAndOperatorStrictMode.ts, 30, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+
+const x4 = x && b;
+>x4 : Symbol(x4, Decl(logicalAndOperatorStrictMode.ts, 31, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+
+const x5 = x && v;
+>x5 : Symbol(x5, Decl(logicalAndOperatorStrictMode.ts, 32, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+
+const x6 = x && u;
+>x6 : Symbol(x6, Decl(logicalAndOperatorStrictMode.ts, 33, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+
+const x7 = x && n;
+>x7 : Symbol(x7, Decl(logicalAndOperatorStrictMode.ts, 34, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+
+const x8 = x && z;
+>x8 : Symbol(x8, Decl(logicalAndOperatorStrictMode.ts, 35, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+
+const b1 = b && a;
+>b1 : Symbol(b1, Decl(logicalAndOperatorStrictMode.ts, 37, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+
+const b2 = b && s;
+>b2 : Symbol(b2, Decl(logicalAndOperatorStrictMode.ts, 38, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+
+const b3 = b && x;
+>b3 : Symbol(b3, Decl(logicalAndOperatorStrictMode.ts, 39, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+
+const b4 = b && b;
+>b4 : Symbol(b4, Decl(logicalAndOperatorStrictMode.ts, 40, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+
+const b5 = b && v;
+>b5 : Symbol(b5, Decl(logicalAndOperatorStrictMode.ts, 41, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+
+const b6 = b && u;
+>b6 : Symbol(b6, Decl(logicalAndOperatorStrictMode.ts, 42, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+
+const b7 = b && n;
+>b7 : Symbol(b7, Decl(logicalAndOperatorStrictMode.ts, 43, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+
+const b8 = b && z;
+>b8 : Symbol(b8, Decl(logicalAndOperatorStrictMode.ts, 44, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+
+const v1 = v && a;
+>v1 : Symbol(v1, Decl(logicalAndOperatorStrictMode.ts, 46, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+
+const v2 = v && s;
+>v2 : Symbol(v2, Decl(logicalAndOperatorStrictMode.ts, 47, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+
+const v3 = v && x;
+>v3 : Symbol(v3, Decl(logicalAndOperatorStrictMode.ts, 48, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+
+const v4 = v && b;
+>v4 : Symbol(v4, Decl(logicalAndOperatorStrictMode.ts, 49, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+
+const v5 = v && v;
+>v5 : Symbol(v5, Decl(logicalAndOperatorStrictMode.ts, 50, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+
+const v6 = v && u;
+>v6 : Symbol(v6, Decl(logicalAndOperatorStrictMode.ts, 51, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+
+const v7 = v && n;
+>v7 : Symbol(v7, Decl(logicalAndOperatorStrictMode.ts, 52, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+
+const v8 = v && z;
+>v8 : Symbol(v8, Decl(logicalAndOperatorStrictMode.ts, 53, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+
+const u1 = u && a;
+>u1 : Symbol(u1, Decl(logicalAndOperatorStrictMode.ts, 55, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+
+const u2 = u && s;
+>u2 : Symbol(u2, Decl(logicalAndOperatorStrictMode.ts, 56, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+
+const u3 = u && x;
+>u3 : Symbol(u3, Decl(logicalAndOperatorStrictMode.ts, 57, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+
+const u4 = u && b;
+>u4 : Symbol(u4, Decl(logicalAndOperatorStrictMode.ts, 58, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+
+const u5 = u && v;
+>u5 : Symbol(u5, Decl(logicalAndOperatorStrictMode.ts, 59, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+
+const u6 = u && u;
+>u6 : Symbol(u6, Decl(logicalAndOperatorStrictMode.ts, 60, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+
+const u7 = u && n;
+>u7 : Symbol(u7, Decl(logicalAndOperatorStrictMode.ts, 61, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+
+const u8 = u && z;
+>u8 : Symbol(u8, Decl(logicalAndOperatorStrictMode.ts, 62, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+
+const n1 = n && a;
+>n1 : Symbol(n1, Decl(logicalAndOperatorStrictMode.ts, 64, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+
+const n2 = n && s;
+>n2 : Symbol(n2, Decl(logicalAndOperatorStrictMode.ts, 65, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+
+const n3 = n && x;
+>n3 : Symbol(n3, Decl(logicalAndOperatorStrictMode.ts, 66, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+
+const n4 = n && b;
+>n4 : Symbol(n4, Decl(logicalAndOperatorStrictMode.ts, 67, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+
+const n5 = n && v;
+>n5 : Symbol(n5, Decl(logicalAndOperatorStrictMode.ts, 68, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+
+const n6 = n && u;
+>n6 : Symbol(n6, Decl(logicalAndOperatorStrictMode.ts, 69, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+
+const n7 = n && n;
+>n7 : Symbol(n7, Decl(logicalAndOperatorStrictMode.ts, 70, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+
+const n8 = n && z;
+>n8 : Symbol(n8, Decl(logicalAndOperatorStrictMode.ts, 71, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+
+const z1 = z && a;
+>z1 : Symbol(z1, Decl(logicalAndOperatorStrictMode.ts, 73, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+>a : Symbol(a, Decl(logicalAndOperatorStrictMode.ts, 1, 5))
+
+const z2 = z && s;
+>z2 : Symbol(z2, Decl(logicalAndOperatorStrictMode.ts, 74, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+>s : Symbol(s, Decl(logicalAndOperatorStrictMode.ts, 2, 5))
+
+const z3 = z && x;
+>z3 : Symbol(z3, Decl(logicalAndOperatorStrictMode.ts, 75, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+>x : Symbol(x, Decl(logicalAndOperatorStrictMode.ts, 3, 5))
+
+const z4 = z && b;
+>z4 : Symbol(z4, Decl(logicalAndOperatorStrictMode.ts, 76, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+>b : Symbol(b, Decl(logicalAndOperatorStrictMode.ts, 4, 5))
+
+const z5 = z && v;
+>z5 : Symbol(z5, Decl(logicalAndOperatorStrictMode.ts, 77, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+>v : Symbol(v, Decl(logicalAndOperatorStrictMode.ts, 5, 5))
+
+const z6 = z && u;
+>z6 : Symbol(z6, Decl(logicalAndOperatorStrictMode.ts, 78, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+>u : Symbol(u, Decl(logicalAndOperatorStrictMode.ts, 6, 5))
+
+const z7 = z && n;
+>z7 : Symbol(z7, Decl(logicalAndOperatorStrictMode.ts, 79, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+>n : Symbol(n, Decl(logicalAndOperatorStrictMode.ts, 7, 5))
+
+const z8 = z && z;
+>z8 : Symbol(z8, Decl(logicalAndOperatorStrictMode.ts, 80, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+>z : Symbol(z, Decl(logicalAndOperatorStrictMode.ts, 8, 5))
+
diff --git a/tests/baselines/reference/logicalAndOperatorStrictMode.types b/tests/baselines/reference/logicalAndOperatorStrictMode.types
new file mode 100644
index 00000000000..ca225d4561a
--- /dev/null
+++ b/tests/baselines/reference/logicalAndOperatorStrictMode.types
@@ -0,0 +1,423 @@
+=== tests/cases/conformance/expressions/binaryOperators/logicalAndOperator/logicalAndOperatorStrictMode.ts ===
+
+const a = [0];
+>a : number[]
+>[0] : number[]
+>0 : number
+
+const s = "";
+>s : string
+>"" : string
+
+const x = 0;
+>x : number
+>0 : number
+
+const b = false;
+>b : boolean
+>false : boolean
+
+const v: void = undefined;
+>v : void
+>undefined : undefined
+
+const u = undefined;
+>u : undefined
+>undefined : undefined
+
+const n = null;
+>n : null
+>null : null
+
+const z = s || x || u;
+>z : string | number | undefined
+>s || x || u : string | number | undefined
+>s || x : string | number
+>s : string
+>x : number
+>u : undefined
+
+const a1 = a && a;
+>a1 : number[]
+>a && a : number[]
+>a : number[]
+>a : number[]
+
+const a2 = a && s;
+>a2 : string
+>a && s : string
+>a : number[]
+>s : string
+
+const a3 = a && x;
+>a3 : number
+>a && x : number
+>a : number[]
+>x : number
+
+const a4 = a && b;
+>a4 : boolean
+>a && b : boolean
+>a : number[]
+>b : boolean
+
+const a5 = a && v;
+>a5 : void
+>a && v : void
+>a : number[]
+>v : void
+
+const a6 = a && u;
+>a6 : undefined
+>a && u : undefined
+>a : number[]
+>u : undefined
+
+const a7 = a && n;
+>a7 : null
+>a && n : null
+>a : number[]
+>n : null
+
+const a8 = a && z;
+>a8 : string | number | undefined
+>a && z : string | number | undefined
+>a : number[]
+>z : string | number | undefined
+
+const s1 = s && a;
+>s1 : number[] | string
+>s && a : number[] | string
+>s : string
+>a : number[]
+
+const s2 = s && s;
+>s2 : string
+>s && s : string
+>s : string
+>s : string
+
+const s3 = s && x;
+>s3 : number | string
+>s && x : number | string
+>s : string
+>x : number
+
+const s4 = s && b;
+>s4 : boolean | string
+>s && b : boolean | string
+>s : string
+>b : boolean
+
+const s5 = s && v;
+>s5 : void | string
+>s && v : void | string
+>s : string
+>v : void
+
+const s6 = s && u;
+>s6 : string | undefined
+>s && u : string | undefined
+>s : string
+>u : undefined
+
+const s7 = s && n;
+>s7 : string | null
+>s && n : string | null
+>s : string
+>n : null
+
+const s8 = s && z;
+>s8 : string | number | undefined
+>s && z : string | number | undefined
+>s : string
+>z : string | number | undefined
+
+const x1 = x && a;
+>x1 : number[] | number
+>x && a : number[] | number
+>x : number
+>a : number[]
+
+const x2 = x && s;
+>x2 : string | number
+>x && s : string | number
+>x : number
+>s : string
+
+const x3 = x && x;
+>x3 : number
+>x && x : number
+>x : number
+>x : number
+
+const x4 = x && b;
+>x4 : boolean | number
+>x && b : boolean | number
+>x : number
+>b : boolean
+
+const x5 = x && v;
+>x5 : void | number
+>x && v : void | number
+>x : number
+>v : void
+
+const x6 = x && u;
+>x6 : number | undefined
+>x && u : number | undefined
+>x : number
+>u : undefined
+
+const x7 = x && n;
+>x7 : number | null
+>x && n : number | null
+>x : number
+>n : null
+
+const x8 = x && z;
+>x8 : string | number | undefined
+>x && z : string | number | undefined
+>x : number
+>z : string | number | undefined
+
+const b1 = b && a;
+>b1 : number[] | boolean
+>b && a : number[] | boolean
+>b : boolean
+>a : number[]
+
+const b2 = b && s;
+>b2 : string | boolean
+>b && s : string | boolean
+>b : boolean
+>s : string
+
+const b3 = b && x;
+>b3 : number | boolean
+>b && x : number | boolean
+>b : boolean
+>x : number
+
+const b4 = b && b;
+>b4 : boolean
+>b && b : boolean
+>b : boolean
+>b : boolean
+
+const b5 = b && v;
+>b5 : void | boolean
+>b && v : void | boolean
+>b : boolean
+>v : void
+
+const b6 = b && u;
+>b6 : boolean | undefined
+>b && u : boolean | undefined
+>b : boolean
+>u : undefined
+
+const b7 = b && n;
+>b7 : boolean | null
+>b && n : boolean | null
+>b : boolean
+>n : null
+
+const b8 = b && z;
+>b8 : string | number | boolean | undefined
+>b && z : string | number | boolean | undefined
+>b : boolean
+>z : string | number | undefined
+
+const v1 = v && a;
+>v1 : number[] | void
+>v && a : number[] | void
+>v : void
+>a : number[]
+
+const v2 = v && s;
+>v2 : string | void
+>v && s : string | void
+>v : void
+>s : string
+
+const v3 = v && x;
+>v3 : number | void
+>v && x : number | void
+>v : void
+>x : number
+
+const v4 = v && b;
+>v4 : boolean | void
+>v && b : boolean | void
+>v : void
+>b : boolean
+
+const v5 = v && v;
+>v5 : void
+>v && v : void
+>v : void
+>v : never
+
+const v6 = v && u;
+>v6 : void
+>v && u : void
+>v : void
+>u : undefined
+
+const v7 = v && n;
+>v7 : void | null
+>v && n : void | null
+>v : void
+>n : null
+
+const v8 = v && z;
+>v8 : string | number | void
+>v && z : string | number | void
+>v : void
+>z : string | number | undefined
+
+const u1 = u && a;
+>u1 : number[] | undefined
+>u && a : number[] | undefined
+>u : undefined
+>a : number[]
+
+const u2 = u && s;
+>u2 : string | undefined
+>u && s : string | undefined
+>u : undefined
+>s : string
+
+const u3 = u && x;
+>u3 : number | undefined
+>u && x : number | undefined
+>u : undefined
+>x : number
+
+const u4 = u && b;
+>u4 : boolean | undefined
+>u && b : boolean | undefined
+>u : undefined
+>b : boolean
+
+const u5 = u && v;
+>u5 : void
+>u && v : void
+>u : undefined
+>v : void
+
+const u6 = u && u;
+>u6 : undefined
+>u && u : undefined
+>u : undefined
+>u : never
+
+const u7 = u && n;
+>u7 : null | undefined
+>u && n : null | undefined
+>u : undefined
+>n : null
+
+const u8 = u && z;
+>u8 : string | number | undefined
+>u && z : string | number | undefined
+>u : undefined
+>z : string | number | undefined
+
+const n1 = n && a;
+>n1 : number[] | null
+>n && a : number[] | null
+>n : null
+>a : number[]
+
+const n2 = n && s;
+>n2 : string | null
+>n && s : string | null
+>n : null
+>s : string
+
+const n3 = n && x;
+>n3 : number | null
+>n && x : number | null
+>n : null
+>x : number
+
+const n4 = n && b;
+>n4 : boolean | null
+>n && b : boolean | null
+>n : null
+>b : boolean
+
+const n5 = n && v;
+>n5 : void | null
+>n && v : void | null
+>n : null
+>v : void
+
+const n6 = n && u;
+>n6 : null | undefined
+>n && u : null | undefined
+>n : null
+>u : undefined
+
+const n7 = n && n;
+>n7 : null
+>n && n : null
+>n : null
+>n : never
+
+const n8 = n && z;
+>n8 : string | number | null | undefined
+>n && z : string | number | null | undefined
+>n : null
+>z : string | number | undefined
+
+const z1 = z && a;
+>z1 : number[] | string | number | undefined
+>z && a : number[] | string | number | undefined
+>z : string | number | undefined
+>a : number[]
+
+const z2 = z && s;
+>z2 : string | number | undefined
+>z && s : string | number | undefined
+>z : string | number | undefined
+>s : string
+
+const z3 = z && x;
+>z3 : number | string | undefined
+>z && x : number | string | undefined
+>z : string | number | undefined
+>x : number
+
+const z4 = z && b;
+>z4 : boolean | string | number | undefined
+>z && b : boolean | string | number | undefined
+>z : string | number | undefined
+>b : boolean
+
+const z5 = z && v;
+>z5 : void | string | number
+>z && v : void | string | number
+>z : string | number | undefined
+>v : void
+
+const z6 = z && u;
+>z6 : string | number | undefined
+>z && u : string | number | undefined
+>z : string | number | undefined
+>u : undefined
+
+const z7 = z && n;
+>z7 : string | number | null | undefined
+>z && n : string | number | null | undefined
+>z : string | number | undefined
+>n : null
+
+const z8 = z && z;
+>z8 : string | number | undefined
+>z && z : string | number | undefined
+>z : string | number | undefined
+>z : string | number
+
diff --git a/tests/cases/conformance/expressions/binaryOperators/logicalAndOperator/logicalAndOperatorStrictMode.ts b/tests/cases/conformance/expressions/binaryOperators/logicalAndOperator/logicalAndOperatorStrictMode.ts
new file mode 100644
index 00000000000..a4ad5ca7719
--- /dev/null
+++ b/tests/cases/conformance/expressions/binaryOperators/logicalAndOperator/logicalAndOperatorStrictMode.ts
@@ -0,0 +1,82 @@
+// @strictNullChecks: true
+
+const a = [0];
+const s = "";
+const x = 0;
+const b = false;
+const v: void = undefined;
+const u = undefined;
+const n = null;
+const z = s || x || u;
+
+const a1 = a && a;
+const a2 = a && s;
+const a3 = a && x;
+const a4 = a && b;
+const a5 = a && v;
+const a6 = a && u;
+const a7 = a && n;
+const a8 = a && z;
+
+const s1 = s && a;
+const s2 = s && s;
+const s3 = s && x;
+const s4 = s && b;
+const s5 = s && v;
+const s6 = s && u;
+const s7 = s && n;
+const s8 = s && z;
+
+const x1 = x && a;
+const x2 = x && s;
+const x3 = x && x;
+const x4 = x && b;
+const x5 = x && v;
+const x6 = x && u;
+const x7 = x && n;
+const x8 = x && z;
+
+const b1 = b && a;
+const b2 = b && s;
+const b3 = b && x;
+const b4 = b && b;
+const b5 = b && v;
+const b6 = b && u;
+const b7 = b && n;
+const b8 = b && z;
+
+const v1 = v && a;
+const v2 = v && s;
+const v3 = v && x;
+const v4 = v && b;
+const v5 = v && v;
+const v6 = v && u;
+const v7 = v && n;
+const v8 = v && z;
+
+const u1 = u && a;
+const u2 = u && s;
+const u3 = u && x;
+const u4 = u && b;
+const u5 = u && v;
+const u6 = u && u;
+const u7 = u && n;
+const u8 = u && z;
+
+const n1 = n && a;
+const n2 = n && s;
+const n3 = n && x;
+const n4 = n && b;
+const n5 = n && v;
+const n6 = n && u;
+const n7 = n && n;
+const n8 = n && z;
+
+const z1 = z && a;
+const z2 = z && s;
+const z3 = z && x;
+const z4 = z && b;
+const z5 = z && v;
+const z6 = z && u;
+const z7 = z && n;
+const z8 = z && z;
\ No newline at end of file

From 094f97e366ee0df43461bb813be8fe4a1df7dfc0 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Fri, 3 Jun 2016 06:22:34 -0700
Subject: [PATCH 162/332] Respond to PR comments

---
 src/compiler/binder.ts  | 18 +++++++-----------
 src/compiler/checker.ts | 18 +++++-------------
 src/compiler/program.ts |  5 ++++-
 src/compiler/types.ts   |  4 +++-
 4 files changed, 19 insertions(+), 26 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index d3363285afc..753e02c7a09 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -1181,9 +1181,9 @@ namespace ts {
             lastContainer = next;
         }
 
-        function declareSymbolAndAddToSymbolTable(node: Declaration, symbolFlags: SymbolFlags, symbolExcludes: SymbolFlags): void {
+        function declareSymbolAndAddToSymbolTable(node: Declaration, symbolFlags: SymbolFlags, symbolExcludes: SymbolFlags): Symbol {
             // Just call this directly so that the return type of this function stays "void".
-            declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
+            return declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
         }
 
         function declareSymbolAndAddToSymbolTableWorker(node: Declaration, symbolFlags: SymbolFlags, symbolExcludes: SymbolFlags): Symbol {
@@ -1298,14 +1298,10 @@ namespace ts {
                         }
                     }
 
+                    const symbol = declareSymbolAndAddToSymbolTable(node, SymbolFlags.ValueModule, SymbolFlags.ValueModuleExcludes);
+
                     if (pattern) {
-                        // TODO: don't really need such a symbol in container.locals...
-                        const symbol = declareSymbol(container.locals, undefined, node, SymbolFlags.ValueModule, SymbolFlags.ValueModuleExcludes);
-                        file.patternAmbientModules = file.patternAmbientModules || [];
-                        file.patternAmbientModules.push({ pattern, symbol });
-                    }
-                    else {
-                        declareSymbolAndAddToSymbolTable(node, SymbolFlags.ValueModule, SymbolFlags.ValueModuleExcludes);
+                        (file.patternAmbientModules || (file.patternAmbientModules = [])).push({ pattern, symbol });
                     }
                 }
             }
@@ -2084,10 +2080,10 @@ namespace ts {
             checkStrictModeFunctionName(<FunctionDeclaration>node);
             if (inStrictMode) {
                 checkStrictModeFunctionDeclaration(node);
-                return bindBlockScopedDeclaration(node, SymbolFlags.Function, SymbolFlags.FunctionExcludes);
+                bindBlockScopedDeclaration(node, SymbolFlags.Function, SymbolFlags.FunctionExcludes);
             }
             else {
-                return declareSymbolAndAddToSymbolTable(<Declaration>node, SymbolFlags.Function, SymbolFlags.FunctionExcludes);
+                declareSymbolAndAddToSymbolTable(<Declaration>node, SymbolFlags.Function, SymbolFlags.FunctionExcludes);
             }
         }
 
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 3e66cf1661f..149f21734a4 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -1292,9 +1292,11 @@ namespace ts {
                 return undefined;
             }
 
-            const patternModuleSymbol = getPatternAmbientModule(moduleName);
-            if (patternModuleSymbol) {
-                return getMergedSymbol(patternModuleSymbol);
+            if (patternAmbientModules) {
+                const pattern = findBestPatternMatch(patternAmbientModules, _ => _.pattern, moduleName);
+                if (pattern) {
+                    return getMergedSymbol(pattern.symbol);
+                }
             }
 
             if (moduleNotFoundError) {
@@ -1304,16 +1306,6 @@ namespace ts {
             return undefined;
         }
 
-        /** Get an ambient module with a wildcard ("*") in it. */
-        function getPatternAmbientModule(name: string): Symbol | undefined {
-            if (patternAmbientModules) {
-                const pattern = findBestPatternMatch(patternAmbientModules, _ => _.pattern, name);
-                if (pattern) {
-                    return pattern.symbol;
-                }
-            }
-        }
-
         // An external module with an 'export =' declaration resolves to the target of the 'export =' declaration,
         // and an external module with no 'export =' declaration resolves to the module itself.
         function resolveExternalModuleSymbol(moduleSymbol: Symbol): Symbol {
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 1677f61c15d..3267737a3e5 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -95,6 +95,7 @@ namespace ts {
         return compilerOptions.traceResolution && host.trace !== undefined;
     }
 
+    /* @internal */
     export function hasZeroOrOneAsteriskCharacter(str: string): boolean {
         let seenAsterisk = false;
         for (let i = 0; i < str.length; i++) {
@@ -502,7 +503,7 @@ namespace ts {
             if (state.traceEnabled) {
                 trace(state.host, Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
             }
-            matchedPattern = matchPatternOrExact(Object.keys(state.compilerOptions.paths), moduleName);
+            matchedPattern = matchPatternOrExact(getKeys(state.compilerOptions.paths), moduleName);
         }
 
         if (matchedPattern) {
@@ -570,6 +571,7 @@ namespace ts {
     }
 
     /** Return the object corresponding to the best pattern to match `candidate`. */
+    /* @internal */
     export function findBestPatternMatch<T>(values: T[], getPattern: (value: T) => Pattern, candidate: string): T | undefined {
         let matchedValue: T | undefined = undefined;
         // use length of prefix as betterness criteria
@@ -592,6 +594,7 @@ namespace ts {
                endsWith(candidate, suffix);
     }
 
+    /* @internal */
     export function tryParsePattern(pattern: string): Pattern | undefined {
         // This should be verified outside of here and a proper error thrown.
         Debug.assert(hasZeroOrOneAsteriskCharacter(pattern));
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index a6f19f121cf..bcc4bbcf696 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2137,12 +2137,14 @@ namespace ts {
     }
 
     /** Represents a "prefix*suffix" pattern. */
+    /* @internal */
     export interface Pattern {
         prefix: string;
         suffix: string;
     }
-    
+
     /** Used to track a `declare module "foo*"`-like declaration. */
+    /* @internal */
     export interface PatternAmbientModule {
         pattern: Pattern;
         symbol: Symbol;

From 1541ebe781d5c0f27a4c0195720c5b63f4dda647 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Fri, 3 Jun 2016 06:34:33 -0700
Subject: [PATCH 163/332] Respond to PR comments

---
 src/compiler/binder.ts                        | 2 +-
 src/compiler/emitter.ts                       | 2 +-
 tests/baselines/reference/ambientShorthand.js | 4 ----
 3 files changed, 2 insertions(+), 6 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index d6ede3049c2..0b678537208 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -54,7 +54,7 @@ namespace ts {
         }
         else if (node.kind === SyntaxKind.ModuleDeclaration) {
             const body = (<ModuleDeclaration>node).body;
-            return body ? getModuleInstanceState(body) : ModuleInstanceState.NonInstantiated;
+            return body ? getModuleInstanceState(body) : ModuleInstanceState.Instantiated;
         }
         else {
             return ModuleInstanceState.Instantiated;
diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index 88895531d16..e86f13b5676 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -6295,7 +6295,7 @@ const _super = (function (geti, seti) {
                 write(getGeneratedNameForNode(node));
                 emitEnd(node.name);
                 write(") ");
-                // node.body must exist, as this is a non-ambient module
+                Debug.assert(node.body !== undefined); // node.body must exist, as this is a non-ambient module
                 if (node.body.kind === SyntaxKind.ModuleBlock) {
                     const saveConvertedLoopState = convertedLoopState;
                     const saveTempFlags = tempFlags;
diff --git a/tests/baselines/reference/ambientShorthand.js b/tests/baselines/reference/ambientShorthand.js
index 76a3b482994..624b0b84771 100644
--- a/tests/baselines/reference/ambientShorthand.js
+++ b/tests/baselines/reference/ambientShorthand.js
@@ -18,7 +18,3 @@ foo(bar, baz);
 var jquery_1 = require("jquery");
 var baz = require("fs");
 jquery_1["default"](jquery_1.bar, baz);
-
-
-//// [user.d.ts]
-/// <reference path="declarations.d.ts" />

From ed6bfcdb08ccb0dbb1e72abb83a1332d39663cac Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Fri, 3 Jun 2016 06:45:00 -0700
Subject: [PATCH 164/332] Add merging tests

---
 src/compiler/checker.ts                        |  1 -
 .../reference/ambientShorthand_duplicate.js    | 16 ++++++++++++++++
 .../ambientShorthand_duplicate.symbols         | 10 ++++++++++
 .../reference/ambientShorthand_duplicate.types | 10 ++++++++++
 .../reference/ambientShorthand_merging.js      | 18 ++++++++++++++++++
 .../reference/ambientShorthand_merging.symbols | 11 +++++++++++
 .../reference/ambientShorthand_merging.types   | 11 +++++++++++
 .../ambient/ambientShorthand_duplicate.ts      | 10 ++++++++++
 .../ambient/ambientShorthand_merging.ts        | 12 ++++++++++++
 9 files changed, 98 insertions(+), 1 deletion(-)
 create mode 100644 tests/baselines/reference/ambientShorthand_duplicate.js
 create mode 100644 tests/baselines/reference/ambientShorthand_duplicate.symbols
 create mode 100644 tests/baselines/reference/ambientShorthand_duplicate.types
 create mode 100644 tests/baselines/reference/ambientShorthand_merging.js
 create mode 100644 tests/baselines/reference/ambientShorthand_merging.symbols
 create mode 100644 tests/baselines/reference/ambientShorthand_merging.types
 create mode 100644 tests/cases/conformance/ambient/ambientShorthand_duplicate.ts
 create mode 100644 tests/cases/conformance/ambient/ambientShorthand_merging.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 50f1ce0d208..c28502907d7 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -380,7 +380,6 @@ namespace ts {
         }
 
         function mergeSymbol(target: Symbol, source: Symbol) {
-            //TODO: how to merge w/ shorthand ambient module?
             if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
                 if (source.flags & SymbolFlags.ValueModule && target.flags & SymbolFlags.ValueModule && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
                     // reset flag when merging instantiated module into value module that has only const enums
diff --git a/tests/baselines/reference/ambientShorthand_duplicate.js b/tests/baselines/reference/ambientShorthand_duplicate.js
new file mode 100644
index 00000000000..d99eb3d27dc
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_duplicate.js
@@ -0,0 +1,16 @@
+//// [tests/cases/conformance/ambient/ambientShorthand_duplicate.ts] ////
+
+//// [declarations1.d.ts]
+declare module "foo";
+
+//// [declarations2.d.ts]
+declare module "foo";
+
+//// [user.ts]
+///<reference path="declarations1.d.ts" />
+///<reference path="declarations1.d.ts" />
+import foo from "foo";
+
+
+//// [user.js]
+"use strict";
diff --git a/tests/baselines/reference/ambientShorthand_duplicate.symbols b/tests/baselines/reference/ambientShorthand_duplicate.symbols
new file mode 100644
index 00000000000..05856b47b92
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_duplicate.symbols
@@ -0,0 +1,10 @@
+=== tests/cases/conformance/ambient/user.ts ===
+///<reference path="declarations1.d.ts" />
+///<reference path="declarations1.d.ts" />
+import foo from "foo";
+>foo : Symbol(foo, Decl(user.ts, 2, 6))
+
+=== tests/cases/conformance/ambient/declarations1.d.ts ===
+declare module "foo";
+No type information for this code.
+No type information for this code.
\ No newline at end of file
diff --git a/tests/baselines/reference/ambientShorthand_duplicate.types b/tests/baselines/reference/ambientShorthand_duplicate.types
new file mode 100644
index 00000000000..1520c5447ec
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_duplicate.types
@@ -0,0 +1,10 @@
+=== tests/cases/conformance/ambient/user.ts ===
+///<reference path="declarations1.d.ts" />
+///<reference path="declarations1.d.ts" />
+import foo from "foo";
+>foo : any
+
+=== tests/cases/conformance/ambient/declarations1.d.ts ===
+declare module "foo";
+No type information for this code.
+No type information for this code.
\ No newline at end of file
diff --git a/tests/baselines/reference/ambientShorthand_merging.js b/tests/baselines/reference/ambientShorthand_merging.js
new file mode 100644
index 00000000000..f0aaefc6366
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_merging.js
@@ -0,0 +1,18 @@
+//// [tests/cases/conformance/ambient/ambientShorthand_merging.ts] ////
+
+//// [declarations1.d.ts]
+declare module "foo";
+
+//// [declarations2.d.ts]
+declare module "foo" {
+    export const bar: number;
+}
+
+//// [user.ts]
+///<reference path="declarations1.d.ts" />
+///<reference path="declarations1.d.ts" />
+import foo, {bar} from "foo";
+
+
+//// [user.js]
+"use strict";
diff --git a/tests/baselines/reference/ambientShorthand_merging.symbols b/tests/baselines/reference/ambientShorthand_merging.symbols
new file mode 100644
index 00000000000..8a0ca5acb74
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_merging.symbols
@@ -0,0 +1,11 @@
+=== tests/cases/conformance/ambient/user.ts ===
+///<reference path="declarations1.d.ts" />
+///<reference path="declarations1.d.ts" />
+import foo, {bar} from "foo";
+>foo : Symbol(foo, Decl(user.ts, 2, 6))
+>bar : Symbol(bar, Decl(user.ts, 2, 13))
+
+=== tests/cases/conformance/ambient/declarations1.d.ts ===
+declare module "foo";
+No type information for this code.
+No type information for this code.
\ No newline at end of file
diff --git a/tests/baselines/reference/ambientShorthand_merging.types b/tests/baselines/reference/ambientShorthand_merging.types
new file mode 100644
index 00000000000..78390a35dd8
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_merging.types
@@ -0,0 +1,11 @@
+=== tests/cases/conformance/ambient/user.ts ===
+///<reference path="declarations1.d.ts" />
+///<reference path="declarations1.d.ts" />
+import foo, {bar} from "foo";
+>foo : any
+>bar : any
+
+=== tests/cases/conformance/ambient/declarations1.d.ts ===
+declare module "foo";
+No type information for this code.
+No type information for this code.
\ No newline at end of file
diff --git a/tests/cases/conformance/ambient/ambientShorthand_duplicate.ts b/tests/cases/conformance/ambient/ambientShorthand_duplicate.ts
new file mode 100644
index 00000000000..03a0dd72249
--- /dev/null
+++ b/tests/cases/conformance/ambient/ambientShorthand_duplicate.ts
@@ -0,0 +1,10 @@
+// @Filename: declarations1.d.ts
+declare module "foo";
+
+// @Filename: declarations2.d.ts
+declare module "foo";
+
+// @Filename: user.ts
+///<reference path="declarations1.d.ts" />
+///<reference path="declarations1.d.ts" />
+import foo from "foo";
diff --git a/tests/cases/conformance/ambient/ambientShorthand_merging.ts b/tests/cases/conformance/ambient/ambientShorthand_merging.ts
new file mode 100644
index 00000000000..a7bd7784d43
--- /dev/null
+++ b/tests/cases/conformance/ambient/ambientShorthand_merging.ts
@@ -0,0 +1,12 @@
+// @Filename: declarations1.d.ts
+declare module "foo";
+
+// @Filename: declarations2.d.ts
+declare module "foo" {
+    export const bar: number;
+}
+
+// @Filename: user.ts
+///<reference path="declarations1.d.ts" />
+///<reference path="declarations1.d.ts" />
+import foo, {bar} from "foo";

From c8ced6703a1fc5e8fb6de371dcbdfbf2df8af293 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Fri, 3 Jun 2016 08:43:48 -0700
Subject: [PATCH 165/332] Use a function `stringify` to simplify calls to
 `JSON.stringify(xyz, undefined, 2)`

---
 src/harness/fourslash.ts | 36 ++++++++++++++++++++----------------
 1 file changed, 20 insertions(+), 16 deletions(-)

diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index bd556c659c7..dde021d1f5c 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -746,7 +746,7 @@ namespace FourSlash {
             }
 
             const missingItem = { fileName: fileName, start: start, end: end, isWriteAccess: isWriteAccess };
-            this.raiseError(`verifyReferencesAtPositionListContains failed - could not find the item: ${JSON.stringify(missingItem, undefined, 2)} in the returned list: (${JSON.stringify(references, undefined, 2)})`);
+            this.raiseError(`verifyReferencesAtPositionListContains failed - could not find the item: ${stringify(missingItem)} in the returned list: (${stringify(references)})`);
         }
 
         public verifyReferencesCountIs(count: number, localFilesOnly = true) {
@@ -800,7 +800,7 @@ namespace FourSlash {
 
         private testDiagnostics(expected: string, diagnostics: ts.Diagnostic[]) {
             const realized = ts.realizeDiagnostics(diagnostics, "\r\n");
-            const actual = JSON.stringify(realized, undefined, 2);
+            const actual = stringify(realized);
             assert.equal(actual, expected);
         }
 
@@ -875,7 +875,7 @@ namespace FourSlash {
                 }
 
                 if (ranges.length !== references.length) {
-                    this.raiseError("Rename location count does not match result.\n\nExpected: " + JSON.stringify(ranges, undefined, 2) + "\n\nActual:" + JSON.stringify(references, undefined, 2));
+                    this.raiseError("Rename location count does not match result.\n\nExpected: " + stringify(ranges) + "\n\nActual:" + stringify(references));
                 }
 
                 ranges = ranges.sort((r1, r2) => r1.start - r2.start);
@@ -888,7 +888,7 @@ namespace FourSlash {
                     if (reference.textSpan.start !== range.start ||
                         ts.textSpanEnd(reference.textSpan) !== range.end) {
 
-                        this.raiseError("Rename location results do not match.\n\nExpected: " + JSON.stringify(ranges, undefined, 2) + "\n\nActual:" + JSON.stringify(references, undefined, 2));
+                        this.raiseError("Rename location results do not match.\n\nExpected: " + stringify(ranges) + "\n\nActual:" + JSON.stringify(references));
                     }
                 }
             }
@@ -972,7 +972,7 @@ namespace FourSlash {
             }
             else {
                 if (actual) {
-                    this.raiseError(`Expected no signature help, but got "${JSON.stringify(actual, undefined, 2)}"`);
+                    this.raiseError(`Expected no signature help, but got "${stringify(actual)}"`);
                 }
             }
         }
@@ -1176,7 +1176,7 @@ namespace FourSlash {
 
         public printCurrentParameterHelp() {
             const help = this.languageService.getSignatureHelpItems(this.activeFile.fileName, this.currentCaretPosition);
-            Harness.IO.log(JSON.stringify(help, undefined, 2));
+            Harness.IO.log(stringify(help));
         }
 
         public printCurrentQuickInfo() {
@@ -1218,7 +1218,7 @@ namespace FourSlash {
 
         public printCurrentSignatureHelp() {
             const sigHelp = this.getActiveSignatureHelpItem();
-            Harness.IO.log(JSON.stringify(sigHelp, undefined, 2));
+            Harness.IO.log(stringify(sigHelp));
         }
 
         public printMemberListMembers() {
@@ -1248,7 +1248,7 @@ namespace FourSlash {
         public printReferences() {
             const references = this.getReferencesAtCaret();
             ts.forEach(references, entry => {
-                Harness.IO.log(JSON.stringify(entry, undefined, 2));
+                Harness.IO.log(stringify(entry));
             });
         }
 
@@ -1745,8 +1745,8 @@ namespace FourSlash {
 
             function jsonMismatchString() {
                 return Harness.IO.newLine() +
-                    "expected: '" + Harness.IO.newLine() + JSON.stringify(expected, undefined, 2) + "'" + Harness.IO.newLine() +
-                    "actual:   '" + Harness.IO.newLine() + JSON.stringify(actual, undefined, 2) + "'";
+                    "expected: '" + Harness.IO.newLine() + stringify(expected, undefined, 2) + "'" + Harness.IO.newLine() +
+                    "actual:   '" + Harness.IO.newLine() + stringify(actual) + "'";
             }
         }
 
@@ -1961,14 +1961,14 @@ namespace FourSlash {
             // if there was an explicit match kind specified, then it should be validated.
             if (matchKind !== undefined) {
                 const missingItem = { name: name, kind: kind, searchValue: searchValue, matchKind: matchKind, fileName: fileName, parentName: parentName };
-                this.raiseError(`verifyNavigationItemsListContains failed - could not find the item: ${JSON.stringify(missingItem, undefined, 2)} in the returned list: (${JSON.stringify(items, undefined, 2)})`);
+                this.raiseError(`verifyNavigationItemsListContains failed - could not find the item: ${stringify(missingItem)} in the returned list: (${stringify(items)})`);
             }
         }
 
         public verifyNavigationBar(json: any) {
             const items = this.languageService.getNavigationBarItems(this.activeFile.fileName);
             if (JSON.stringify(items, replacer) !== JSON.stringify(json)) {
-                this.raiseError(`verifyNavigationBar failed - expected: ${JSON.stringify(json, undefined, 2)}, got: ${JSON.stringify(items, replacer, 2)}`);
+                this.raiseError(`verifyNavigationBar failed - expected: ${stringify(json)}, got: ${stringify(items, replacer)}`);
             }
 
             // Make the data easier to read.
@@ -2031,7 +2031,7 @@ namespace FourSlash {
             }
 
             const missingItem = { fileName: fileName, start: start, end: end, isWriteAccess: isWriteAccess };
-            this.raiseError(`verifyOccurrencesAtPositionListContains failed - could not find the item: ${JSON.stringify(missingItem, undefined, 2)} in the returned list: (${JSON.stringify(occurrences, undefined, 2)})`);
+            this.raiseError(`verifyOccurrencesAtPositionListContains failed - could not find the item: ${stringify(missingItem)} in the returned list: (${stringify(occurrences)})`);
         }
 
         public verifyOccurrencesAtPositionListCount(expectedCount: number) {
@@ -2070,7 +2070,7 @@ namespace FourSlash {
             }
 
             const missingItem = { fileName: fileName, start: start, end: end, kind: kind };
-            this.raiseError(`verifyDocumentHighlightsAtPositionListContains failed - could not find the item: ${JSON.stringify(missingItem, undefined, 2)} in the returned list: (${JSON.stringify(documentHighlights, undefined, 2)})`);
+            this.raiseError(`verifyDocumentHighlightsAtPositionListContains failed - could not find the item: ${stringify(missingItem)} in the returned list: (${stringify(documentHighlights)})`);
         }
 
         public verifyDocumentHighlightsAtPositionListCount(expectedCount: number, fileNamesToSearch: string[]) {
@@ -2136,9 +2136,9 @@ namespace FourSlash {
                 }
             }
 
-            const itemsString = items.map((item) => JSON.stringify({ name: item.name, kind: item.kind }, undefined, 2)).join(",\n");
+            const itemsString = items.map(item => stringify({ name: item.name, kind: item.kind })).join(",\n");
 
-            this.raiseError(`Expected "${JSON.stringify({ name, text, documentation, kind }, undefined, 2)}" to be in list [${itemsString}]`);
+            this.raiseError(`Expected "${stringify({ name, text, documentation, kind )}" to be in list [${itemsString}]`);
         }
 
         private findFile(indexOrName: any) {
@@ -2701,6 +2701,10 @@ ${code}
         }
         return result;
     }
+
+    function stringify(data: any, replacer?: (key: string, value: any) => any): string {
+        return JSON.stringify(data, replacer, 2);
+    }
 }
 
 namespace FourSlashInterface {

From 8b0974a77e6317891fc11259dd06f721b621be5d Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Fri, 3 Jun 2016 09:29:21 -0700
Subject: [PATCH 166/332] Update tests

---
 .../reference/ArrowFunction2.errors.txt       |  9 -------
 tests/baselines/reference/ArrowFunction2.js   |  8 -------
 ...rserErrorRecovery_ArgumentList5.errors.txt | 16 -------------
 .../parserErrorRecovery_ArgumentList5.js      | 11 ---------
 .../parserX_ArrowFunction2.errors.txt         | 12 ----------
 .../reference/parserX_ArrowFunction2.js       |  8 -------
 ...gCommasInFunctionParametersAndArguments.js | 11 +++++++++
 ...asInFunctionParametersAndArguments.symbols |  7 ++++++
 ...mmasInFunctionParametersAndArguments.types | 10 ++++++++
 ...trailingSeparatorInFunctionCall.errors.txt | 24 -------------------
 .../trailingSeparatorInFunctionCall.js        | 18 --------------
 .../trailingSeparatorInFunctionCall.ts        |  9 -------
 ...gCommasInFunctionParametersAndArguments.ts |  4 ++++
 .../parserErrorRecovery_ArgumentList5.ts      |  4 ----
 .../ArrowFunctions/ArrowFunction2.ts          |  3 ---
 .../ArrowFunctions/parserX_ArrowFunction2.ts  |  3 ---
 16 files changed, 32 insertions(+), 125 deletions(-)
 delete mode 100644 tests/baselines/reference/ArrowFunction2.errors.txt
 delete mode 100644 tests/baselines/reference/ArrowFunction2.js
 delete mode 100644 tests/baselines/reference/parserErrorRecovery_ArgumentList5.errors.txt
 delete mode 100644 tests/baselines/reference/parserErrorRecovery_ArgumentList5.js
 delete mode 100644 tests/baselines/reference/parserX_ArrowFunction2.errors.txt
 delete mode 100644 tests/baselines/reference/parserX_ArrowFunction2.js
 delete mode 100644 tests/baselines/reference/trailingSeparatorInFunctionCall.errors.txt
 delete mode 100644 tests/baselines/reference/trailingSeparatorInFunctionCall.js
 delete mode 100644 tests/cases/compiler/trailingSeparatorInFunctionCall.ts
 delete mode 100644 tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArgumentLists/parserErrorRecovery_ArgumentList5.ts
 delete mode 100644 tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/ArrowFunction2.ts
 delete mode 100644 tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/parserX_ArrowFunction2.ts

diff --git a/tests/baselines/reference/ArrowFunction2.errors.txt b/tests/baselines/reference/ArrowFunction2.errors.txt
deleted file mode 100644
index d18bc483acc..00000000000
--- a/tests/baselines/reference/ArrowFunction2.errors.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/ArrowFunction2.ts(1,13): error TS2304: Cannot find name 'b'.
-
-
-==== tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/ArrowFunction2.ts (2 errors) ====
-    var v = (a: b,) => {
-                ~
-!!! error TS2304: Cannot find name 'b'.
-       
-    };
\ No newline at end of file
diff --git a/tests/baselines/reference/ArrowFunction2.js b/tests/baselines/reference/ArrowFunction2.js
deleted file mode 100644
index fa6b8bf3b9e..00000000000
--- a/tests/baselines/reference/ArrowFunction2.js
+++ /dev/null
@@ -1,8 +0,0 @@
-//// [ArrowFunction2.ts]
-var v = (a: b,) => {
-   
-};
-
-//// [ArrowFunction2.js]
-var v = function (a) {
-};
diff --git a/tests/baselines/reference/parserErrorRecovery_ArgumentList5.errors.txt b/tests/baselines/reference/parserErrorRecovery_ArgumentList5.errors.txt
deleted file mode 100644
index 5113807faa8..00000000000
--- a/tests/baselines/reference/parserErrorRecovery_ArgumentList5.errors.txt
+++ /dev/null
@@ -1,16 +0,0 @@
-tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArgumentLists/parserErrorRecovery_ArgumentList5.ts(2,4): error TS2304: Cannot find name 'bar'.
-tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArgumentLists/parserErrorRecovery_ArgumentList5.ts(2,8): error TS2304: Cannot find name 'a'.
-tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArgumentLists/parserErrorRecovery_ArgumentList5.ts(2,9): error TS1009: Trailing comma not allowed.
-
-
-==== tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArgumentLists/parserErrorRecovery_ArgumentList5.ts (3 errors) ====
-    function foo() {
-       bar(a,)
-       ~~~
-!!! error TS2304: Cannot find name 'bar'.
-           ~
-!!! error TS2304: Cannot find name 'a'.
-            ~
-!!! error TS1009: Trailing comma not allowed.
-       return;
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/parserErrorRecovery_ArgumentList5.js b/tests/baselines/reference/parserErrorRecovery_ArgumentList5.js
deleted file mode 100644
index bbb65a44e07..00000000000
--- a/tests/baselines/reference/parserErrorRecovery_ArgumentList5.js
+++ /dev/null
@@ -1,11 +0,0 @@
-//// [parserErrorRecovery_ArgumentList5.ts]
-function foo() {
-   bar(a,)
-   return;
-}
-
-//// [parserErrorRecovery_ArgumentList5.js]
-function foo() {
-    bar(a);
-    return;
-}
diff --git a/tests/baselines/reference/parserX_ArrowFunction2.errors.txt b/tests/baselines/reference/parserX_ArrowFunction2.errors.txt
deleted file mode 100644
index 20b4cb45e45..00000000000
--- a/tests/baselines/reference/parserX_ArrowFunction2.errors.txt
+++ /dev/null
@@ -1,12 +0,0 @@
-tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/parserX_ArrowFunction2.ts(1,13): error TS2304: Cannot find name 'b'.
-tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/parserX_ArrowFunction2.ts(1,14): error TS1009: Trailing comma not allowed.
-
-
-==== tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/parserX_ArrowFunction2.ts (2 errors) ====
-    var v = (a: b,) => {
-                ~
-!!! error TS2304: Cannot find name 'b'.
-                 ~
-!!! error TS1009: Trailing comma not allowed.
-       
-    };
\ No newline at end of file
diff --git a/tests/baselines/reference/parserX_ArrowFunction2.js b/tests/baselines/reference/parserX_ArrowFunction2.js
deleted file mode 100644
index a30294b658b..00000000000
--- a/tests/baselines/reference/parserX_ArrowFunction2.js
+++ /dev/null
@@ -1,8 +0,0 @@
-//// [parserX_ArrowFunction2.ts]
-var v = (a: b,) => {
-   
-};
-
-//// [parserX_ArrowFunction2.js]
-var v = function (a) {
-};
diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
index 5fb4b7d638f..a9b173f9db2 100644
--- a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
@@ -2,8 +2,19 @@
 function f1(x,) {}
 
 f1(1,);
+
+function f2(...args,) {}
+
+f2(...[],);
 
 
 //// [trailingCommasInFunctionParametersAndArguments.js]
 function f1(x) { }
 f1(1);
+function f2() {
+    var args = [];
+    for (var _i = 0; _i < arguments.length; _i++) {
+        args[_i - 0] = arguments[_i];
+    }
+}
+f2.apply(void 0, []);
diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols
index 5eb9d75807b..dd9ce5319c9 100644
--- a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols
@@ -6,3 +6,10 @@ function f1(x,) {}
 f1(1,);
 >f1 : Symbol(f1, Decl(trailingCommasInFunctionParametersAndArguments.ts, 0, 0))
 
+function f2(...args,) {}
+>f2 : Symbol(f2, Decl(trailingCommasInFunctionParametersAndArguments.ts, 2, 7))
+>args : Symbol(args, Decl(trailingCommasInFunctionParametersAndArguments.ts, 4, 12))
+
+f2(...[],);
+>f2 : Symbol(f2, Decl(trailingCommasInFunctionParametersAndArguments.ts, 2, 7))
+
diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types
index 4af2326076b..0a8d34d1df2 100644
--- a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types
@@ -8,3 +8,13 @@ f1(1,);
 >f1 : (x: any) => void
 >1 : number
 
+function f2(...args,) {}
+>f2 : (...args: any[]) => void
+>args : any[]
+
+f2(...[],);
+>f2(...[],) : void
+>f2 : (...args: any[]) => void
+>...[] : undefined
+>[] : undefined[]
+
diff --git a/tests/baselines/reference/trailingSeparatorInFunctionCall.errors.txt b/tests/baselines/reference/trailingSeparatorInFunctionCall.errors.txt
deleted file mode 100644
index 76e09a1a4de..00000000000
--- a/tests/baselines/reference/trailingSeparatorInFunctionCall.errors.txt
+++ /dev/null
@@ -1,24 +0,0 @@
-tests/cases/compiler/trailingSeparatorInFunctionCall.ts(4,1): error TS2346: Supplied parameters do not match any signature of call target.
-tests/cases/compiler/trailingSeparatorInFunctionCall.ts(4,7): error TS1009: Trailing comma not allowed.
-tests/cases/compiler/trailingSeparatorInFunctionCall.ts(9,1): error TS2346: Supplied parameters do not match any signature of call target.
-tests/cases/compiler/trailingSeparatorInFunctionCall.ts(9,8): error TS1009: Trailing comma not allowed.
-
-
-==== tests/cases/compiler/trailingSeparatorInFunctionCall.ts (4 errors) ====
-    function f(x, y) {
-    }
-    
-    f(1, 2, );
-    ~~~~~~~~~
-!!! error TS2346: Supplied parameters do not match any signature of call target.
-          ~
-!!! error TS1009: Trailing comma not allowed.
-    
-    function f2<T>(x: T, y: T) {
-    }
-    
-    f2(1, 2, );
-    ~~~~~~~~~~
-!!! error TS2346: Supplied parameters do not match any signature of call target.
-           ~
-!!! error TS1009: Trailing comma not allowed.
\ No newline at end of file
diff --git a/tests/baselines/reference/trailingSeparatorInFunctionCall.js b/tests/baselines/reference/trailingSeparatorInFunctionCall.js
deleted file mode 100644
index 4b531479837..00000000000
--- a/tests/baselines/reference/trailingSeparatorInFunctionCall.js
+++ /dev/null
@@ -1,18 +0,0 @@
-//// [trailingSeparatorInFunctionCall.ts]
-function f(x, y) {
-}
-
-f(1, 2, );
-
-function f2<T>(x: T, y: T) {
-}
-
-f2(1, 2, );
-
-//// [trailingSeparatorInFunctionCall.js]
-function f(x, y) {
-}
-f(1, 2);
-function f2(x, y) {
-}
-f2(1, 2);
diff --git a/tests/cases/compiler/trailingSeparatorInFunctionCall.ts b/tests/cases/compiler/trailingSeparatorInFunctionCall.ts
deleted file mode 100644
index b9f62e1e8cc..00000000000
--- a/tests/cases/compiler/trailingSeparatorInFunctionCall.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-function f(x, y) {
-}
-
-f(1, 2, );
-
-function f2<T>(x: T, y: T) {
-}
-
-f2(1, 2, );
\ No newline at end of file
diff --git a/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts b/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
index 0492ed989e3..4b628e7e559 100644
--- a/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
+++ b/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
@@ -1,3 +1,7 @@
 function f1(x,) {}
 
 f1(1,);
+
+function f2(...args,) {}
+
+f2(...[],);
diff --git a/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArgumentLists/parserErrorRecovery_ArgumentList5.ts b/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArgumentLists/parserErrorRecovery_ArgumentList5.ts
deleted file mode 100644
index 0270f766fef..00000000000
--- a/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArgumentLists/parserErrorRecovery_ArgumentList5.ts
+++ /dev/null
@@ -1,4 +0,0 @@
-function foo() {
-   bar(a,)
-   return;
-}
\ No newline at end of file
diff --git a/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/ArrowFunction2.ts b/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/ArrowFunction2.ts
deleted file mode 100644
index 8b4d99e2ef5..00000000000
--- a/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/ArrowFunction2.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-var v = (a: b,) => {
-   
-};
\ No newline at end of file
diff --git a/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/parserX_ArrowFunction2.ts b/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/parserX_ArrowFunction2.ts
deleted file mode 100644
index 8b4d99e2ef5..00000000000
--- a/tests/cases/conformance/parser/ecmascript5/ErrorRecovery/ArrowFunctions/parserX_ArrowFunction2.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-var v = (a: b,) => {
-   
-};
\ No newline at end of file

From 2bed32d30862b9bf6b3c202f1ce907129804eb95 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Fri, 3 Jun 2016 09:08:48 -0700
Subject: [PATCH 167/332] Fix mistake

---
 src/harness/fourslash.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index dde021d1f5c..c05fca5bb47 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -1745,7 +1745,7 @@ namespace FourSlash {
 
             function jsonMismatchString() {
                 return Harness.IO.newLine() +
-                    "expected: '" + Harness.IO.newLine() + stringify(expected, undefined, 2) + "'" + Harness.IO.newLine() +
+                    "expected: '" + Harness.IO.newLine() + stringify(expected) + "'" + Harness.IO.newLine() +
                     "actual:   '" + Harness.IO.newLine() + stringify(actual) + "'";
             }
         }
@@ -2138,7 +2138,7 @@ namespace FourSlash {
 
             const itemsString = items.map(item => stringify({ name: item.name, kind: item.kind })).join(",\n");
 
-            this.raiseError(`Expected "${stringify({ name, text, documentation, kind )}" to be in list [${itemsString}]`);
+            this.raiseError(`Expected "${stringify({ name, text, documentation, kind })}" to be in list [${itemsString}]`);
         }
 
         private findFile(indexOrName: any) {

From e412f52b332f58f360ac68ae51974fa084074d7d Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Fri, 3 Jun 2016 06:50:00 -0700
Subject: [PATCH 168/332] Include indent in navigation bar protocol

Previously navbar01 test had indents when run in the browser but not when run from node. Now they run the same.
---
 src/server/client.ts                     |  2 +-
 src/server/protocol.d.ts                 |  5 +++++
 src/server/session.ts                    |  3 ++-
 tests/cases/fourslash/server/navbar01.ts | 12 ++++++++----
 4 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/src/server/client.ts b/src/server/client.ts
index 5c576347d19..b0a1a8ec9e9 100644
--- a/src/server/client.ts
+++ b/src/server/client.ts
@@ -459,7 +459,7 @@ namespace ts.server {
                 kindModifiers: item.kindModifiers || "",
                 spans: item.spans.map(span => createTextSpanFromBounds(this.lineOffsetToPosition(fileName, span.start), this.lineOffsetToPosition(fileName, span.end))),
                 childItems: this.decodeNavigationBarItems(item.childItems, fileName),
-                indent: 0,
+                indent: item.indent,
                 bolded: false,
                 grayed: false
             }));
diff --git a/src/server/protocol.d.ts b/src/server/protocol.d.ts
index f6a418fb578..d2c15b308ec 100644
--- a/src/server/protocol.d.ts
+++ b/src/server/protocol.d.ts
@@ -1242,6 +1242,11 @@ declare namespace ts.server.protocol {
           * Optional children.
           */
         childItems?: NavigationBarItem[];
+
+        /**
+          * Number of levels deep this item should appear.
+          */
+        indent: number;
     }
 
     export interface NavBarResponse extends Response {
diff --git a/src/server/session.ts b/src/server/session.ts
index 09b86da48cc..7f3ba105999 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -872,7 +872,8 @@ namespace ts.server {
                     start: compilerService.host.positionToLineOffset(fileName, span.start),
                     end: compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(span))
                 })),
-                childItems: this.decorateNavigationBarItem(project, fileName, item.childItems)
+                childItems: this.decorateNavigationBarItem(project, fileName, item.childItems),
+                indent: item.indent
             }));
         }
 
diff --git a/tests/cases/fourslash/server/navbar01.ts b/tests/cases/fourslash/server/navbar01.ts
index 7f2229fcb81..9e0f2a36396 100644
--- a/tests/cases/fourslash/server/navbar01.ts
+++ b/tests/cases/fourslash/server/navbar01.ts
@@ -85,7 +85,8 @@ verify.navigationBar([
                 "text": "prop",
                 "kind": "property"
             }
-        ]
+        ],
+        "indent": 1
     },
     {
         "text": "Shapes",
@@ -100,7 +101,8 @@ verify.navigationBar([
                 "text": "Values",
                 "kind": "enum"
             }
-        ]
+        ],
+        "indent": 1
     },
     {
         "text": "Point",
@@ -143,7 +145,8 @@ verify.navigationBar([
                 "kind": "property",
                 "kindModifiers": "public"
             }
-        ]
+        ],
+        "indent": 2
     },
     {
         "text": "Values",
@@ -161,6 +164,7 @@ verify.navigationBar([
                 "text": "value3",
                 "kind": "property"
             }
-        ]
+        ],
+        "indent": 2
     }
 ]);

From 39c4e8ad1f63b54d642d7896874f7c0f98cf4699 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Fri, 3 Jun 2016 17:30:49 -0700
Subject: [PATCH 169/332] Remove unnecessary restrictions in property access
 narrowing

---
 src/compiler/checker.ts | 20 +++++---------------
 1 file changed, 5 insertions(+), 15 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index b8f078ea9a5..c538134e6d8 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -9991,24 +9991,14 @@ namespace ts {
             }
 
             const propType = getTypeOfSymbol(prop);
+            // Only compute control flow type if this is a property access expression that isn't an
+            // assignment target, and the referenced property was declared as a variable, property,
+            // accessor, or optional method.
             if (node.kind !== SyntaxKind.PropertyAccessExpression || isAssignmentTarget(node) ||
-                !(propType.flags & TypeFlags.Union) && !(prop.flags & (SymbolFlags.Variable | SymbolFlags.Property | SymbolFlags.Accessor))) {
+                !(prop.flags & (SymbolFlags.Variable | SymbolFlags.Property | SymbolFlags.Accessor)) &&
+                !(prop.flags & SymbolFlags.Method && propType.flags & TypeFlags.Union)) {
                 return propType;
             }
-            const leftmostNode = getLeftmostIdentifierOrThis(node);
-            if (!leftmostNode) {
-                return propType;
-            }
-            if (leftmostNode.kind === SyntaxKind.Identifier) {
-                const leftmostSymbol = getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(<Identifier>leftmostNode));
-                if (!leftmostSymbol) {
-                    return propType;
-                }
-                const declaration = leftmostSymbol.valueDeclaration;
-                if (!declaration || declaration.kind !== SyntaxKind.VariableDeclaration && declaration.kind !== SyntaxKind.Parameter && declaration.kind !== SyntaxKind.BindingElement) {
-                    return propType;
-                }
-            }
             return getFlowTypeOfReference(node, propType, /*assumeInitialized*/ true, /*includeOuterFunctions*/ false);
         }
 

From a5e9071a2f533ff18c51974c73ffaeeb686230b1 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Fri, 3 Jun 2016 17:31:16 -0700
Subject: [PATCH 170/332] Fix fourslash test

---
 .../quickInfoOnNarrowedTypeInModule.ts        | 32 +++++++++++++------
 1 file changed, 22 insertions(+), 10 deletions(-)

diff --git a/tests/cases/fourslash/quickInfoOnNarrowedTypeInModule.ts b/tests/cases/fourslash/quickInfoOnNarrowedTypeInModule.ts
index 1f95de35403..cfeaabfbb86 100644
--- a/tests/cases/fourslash/quickInfoOnNarrowedTypeInModule.ts
+++ b/tests/cases/fourslash/quickInfoOnNarrowedTypeInModule.ts
@@ -50,14 +50,26 @@ goTo.marker('6');
 verify.quickInfoIs('var m.exportedStrOrNum: string');
 verify.completionListContains("exportedStrOrNum", "var m.exportedStrOrNum: string");
 
-['7', '8', '9'].forEach((marker, index, arr) => {
-    goTo.marker(marker);
-    verify.quickInfoIs('var m.exportedStrOrNum: string | number');
-    verify.completionListContains("exportedStrOrNum", "var m.exportedStrOrNum: string | number");
-});
+goTo.marker('7');
+verify.quickInfoIs('var m.exportedStrOrNum: string | number');
+verify.completionListContains("exportedStrOrNum", "var m.exportedStrOrNum: string | number");
 
-['7', '8', '9'].forEach((marker, index, arr) => {
-    goTo.marker(marker);
-    verify.quickInfoIs('var m.exportedStrOrNum: string | number');
-    verify.memberListContains("exportedStrOrNum", "var m.exportedStrOrNum: string | number");
-});
\ No newline at end of file
+goTo.marker('8');
+verify.quickInfoIs('var m.exportedStrOrNum: number');
+verify.completionListContains("exportedStrOrNum", "var m.exportedStrOrNum: number");
+
+goTo.marker('9');
+verify.quickInfoIs('var m.exportedStrOrNum: string');
+verify.completionListContains("exportedStrOrNum", "var m.exportedStrOrNum: string");
+
+goTo.marker('7');
+verify.quickInfoIs('var m.exportedStrOrNum: string | number');
+verify.memberListContains("exportedStrOrNum", "var m.exportedStrOrNum: string | number");
+
+goTo.marker('8');
+verify.quickInfoIs('var m.exportedStrOrNum: number');
+verify.memberListContains("exportedStrOrNum", "var m.exportedStrOrNum: number");
+
+goTo.marker('9');
+verify.quickInfoIs('var m.exportedStrOrNum: string');
+verify.memberListContains("exportedStrOrNum", "var m.exportedStrOrNum: string");
\ No newline at end of file

From 87ee72b25a10588ca5573c377e3fb24eeca5a096 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Fri, 3 Jun 2016 17:31:28 -0700
Subject: [PATCH 171/332] Add regression test

---
 .../reference/classStaticPropertyTypeGuard.js | 32 +++++++++++++++++++
 .../classStaticPropertyTypeGuard.symbols      | 29 +++++++++++++++++
 .../classStaticPropertyTypeGuard.types        | 31 ++++++++++++++++++
 .../compiler/classStaticPropertyTypeGuard.ts  | 15 +++++++++
 4 files changed, 107 insertions(+)
 create mode 100644 tests/baselines/reference/classStaticPropertyTypeGuard.js
 create mode 100644 tests/baselines/reference/classStaticPropertyTypeGuard.symbols
 create mode 100644 tests/baselines/reference/classStaticPropertyTypeGuard.types
 create mode 100644 tests/cases/compiler/classStaticPropertyTypeGuard.ts

diff --git a/tests/baselines/reference/classStaticPropertyTypeGuard.js b/tests/baselines/reference/classStaticPropertyTypeGuard.js
new file mode 100644
index 00000000000..872f78db4c4
--- /dev/null
+++ b/tests/baselines/reference/classStaticPropertyTypeGuard.js
@@ -0,0 +1,32 @@
+//// [classStaticPropertyTypeGuard.ts]
+
+// Repro from #8923
+
+class A {
+    private static _a: string | undefined;
+
+    public get a(): string {
+        if (A._a) {
+            return A._a; // is possibly null or undefined.
+        }
+        return A._a = 'helloworld';
+    }
+}
+
+//// [classStaticPropertyTypeGuard.js]
+// Repro from #8923
+var A = (function () {
+    function A() {
+    }
+    Object.defineProperty(A.prototype, "a", {
+        get: function () {
+            if (A._a) {
+                return A._a; // is possibly null or undefined.
+            }
+            return A._a = 'helloworld';
+        },
+        enumerable: true,
+        configurable: true
+    });
+    return A;
+}());
diff --git a/tests/baselines/reference/classStaticPropertyTypeGuard.symbols b/tests/baselines/reference/classStaticPropertyTypeGuard.symbols
new file mode 100644
index 00000000000..c4d2acd50b0
--- /dev/null
+++ b/tests/baselines/reference/classStaticPropertyTypeGuard.symbols
@@ -0,0 +1,29 @@
+=== tests/cases/compiler/classStaticPropertyTypeGuard.ts ===
+
+// Repro from #8923
+
+class A {
+>A : Symbol(A, Decl(classStaticPropertyTypeGuard.ts, 0, 0))
+
+    private static _a: string | undefined;
+>_a : Symbol(A._a, Decl(classStaticPropertyTypeGuard.ts, 3, 9))
+
+    public get a(): string {
+>a : Symbol(A.a, Decl(classStaticPropertyTypeGuard.ts, 4, 42))
+
+        if (A._a) {
+>A._a : Symbol(A._a, Decl(classStaticPropertyTypeGuard.ts, 3, 9))
+>A : Symbol(A, Decl(classStaticPropertyTypeGuard.ts, 0, 0))
+>_a : Symbol(A._a, Decl(classStaticPropertyTypeGuard.ts, 3, 9))
+
+            return A._a; // is possibly null or undefined.
+>A._a : Symbol(A._a, Decl(classStaticPropertyTypeGuard.ts, 3, 9))
+>A : Symbol(A, Decl(classStaticPropertyTypeGuard.ts, 0, 0))
+>_a : Symbol(A._a, Decl(classStaticPropertyTypeGuard.ts, 3, 9))
+        }
+        return A._a = 'helloworld';
+>A._a : Symbol(A._a, Decl(classStaticPropertyTypeGuard.ts, 3, 9))
+>A : Symbol(A, Decl(classStaticPropertyTypeGuard.ts, 0, 0))
+>_a : Symbol(A._a, Decl(classStaticPropertyTypeGuard.ts, 3, 9))
+    }
+}
diff --git a/tests/baselines/reference/classStaticPropertyTypeGuard.types b/tests/baselines/reference/classStaticPropertyTypeGuard.types
new file mode 100644
index 00000000000..f89854c919d
--- /dev/null
+++ b/tests/baselines/reference/classStaticPropertyTypeGuard.types
@@ -0,0 +1,31 @@
+=== tests/cases/compiler/classStaticPropertyTypeGuard.ts ===
+
+// Repro from #8923
+
+class A {
+>A : A
+
+    private static _a: string | undefined;
+>_a : string | undefined
+
+    public get a(): string {
+>a : string
+
+        if (A._a) {
+>A._a : string | undefined
+>A : typeof A
+>_a : string | undefined
+
+            return A._a; // is possibly null or undefined.
+>A._a : string
+>A : typeof A
+>_a : string
+        }
+        return A._a = 'helloworld';
+>A._a = 'helloworld' : string
+>A._a : string | undefined
+>A : typeof A
+>_a : string | undefined
+>'helloworld' : string
+    }
+}
diff --git a/tests/cases/compiler/classStaticPropertyTypeGuard.ts b/tests/cases/compiler/classStaticPropertyTypeGuard.ts
new file mode 100644
index 00000000000..93655cfb092
--- /dev/null
+++ b/tests/cases/compiler/classStaticPropertyTypeGuard.ts
@@ -0,0 +1,15 @@
+// @strictNullChecks: true
+// @target: ES5
+
+// Repro from #8923
+
+class A {
+    private static _a: string | undefined;
+
+    public get a(): string {
+        if (A._a) {
+            return A._a; // is possibly null or undefined.
+        }
+        return A._a = 'helloworld';
+    }
+}
\ No newline at end of file

From bb7818b837fb4145f9fb42e64df4484c8547b7a7 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sat, 4 Jun 2016 14:42:45 -0700
Subject: [PATCH 172/332] Consider property declarations to be control flow
 containers

---
 src/compiler/checker.ts   | 15 ++++++++++++---
 src/compiler/utilities.ts |  9 ---------
 2 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index c538134e6d8..67bd747a4ae 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -8091,13 +8091,22 @@ namespace ts {
             return expression;
         }
 
+        function getControlFlowContainer(node: Node): Node {
+            while (true) {
+                node = node.parent;
+                if (isFunctionLike(node) || node.kind === SyntaxKind.ModuleBlock || node.kind === SyntaxKind.SourceFile || node.kind === SyntaxKind.PropertyDeclaration) {
+                    return node;
+                }
+            }
+        }
+
         function isDeclarationIncludedInFlow(reference: Node, declaration: Declaration, includeOuterFunctions: boolean) {
-            const declarationContainer = getContainingFunctionOrModule(declaration);
-            let container = getContainingFunctionOrModule(reference);
+            const declarationContainer = getControlFlowContainer(declaration);
+            let container = getControlFlowContainer(reference);
             while (container !== declarationContainer &&
                 (container.kind === SyntaxKind.FunctionExpression || container.kind === SyntaxKind.ArrowFunction) &&
                 (includeOuterFunctions || getImmediatelyInvokedFunctionExpression(<FunctionExpression>container))) {
-                container = getContainingFunctionOrModule(container);
+                container = getControlFlowContainer(container);
             }
             return container === declarationContainer;
         }
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 74ea3459b23..e2fa4662c1f 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -880,15 +880,6 @@ namespace ts {
         }
     }
 
-    export function getContainingFunctionOrModule(node: Node): Node {
-        while (true) {
-            node = node.parent;
-            if (isFunctionLike(node) || node.kind === SyntaxKind.ModuleDeclaration || node.kind === SyntaxKind.SourceFile) {
-                return node;
-            }
-        }
-    }
-
     export function getContainingClass(node: Node): ClassLikeDeclaration {
         while (true) {
             node = node.parent;

From 3b1effb7df5e6221260652280d47b78ae9ecbfac Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Sat, 4 Jun 2016 14:50:37 -0700
Subject: [PATCH 173/332] Adding regression test

---
 .../controlFlowPropertyInitializer.js         | 19 +++++++++++++++++++
 .../controlFlowPropertyInitializer.symbols    | 14 ++++++++++++++
 .../controlFlowPropertyInitializer.types      | 15 +++++++++++++++
 .../controlFlowPropertyInitializer.ts         |  9 +++++++++
 4 files changed, 57 insertions(+)
 create mode 100644 tests/baselines/reference/controlFlowPropertyInitializer.js
 create mode 100644 tests/baselines/reference/controlFlowPropertyInitializer.symbols
 create mode 100644 tests/baselines/reference/controlFlowPropertyInitializer.types
 create mode 100644 tests/cases/compiler/controlFlowPropertyInitializer.ts

diff --git a/tests/baselines/reference/controlFlowPropertyInitializer.js b/tests/baselines/reference/controlFlowPropertyInitializer.js
new file mode 100644
index 00000000000..5d8e10651fa
--- /dev/null
+++ b/tests/baselines/reference/controlFlowPropertyInitializer.js
@@ -0,0 +1,19 @@
+//// [controlFlowPropertyInitializer.ts]
+
+// Repro from #8967
+
+const LANG = "Turbo Pascal"
+
+class BestLanguage {
+    name = LANG;
+}
+
+//// [controlFlowPropertyInitializer.js]
+// Repro from #8967
+var LANG = "Turbo Pascal";
+var BestLanguage = (function () {
+    function BestLanguage() {
+        this.name = LANG;
+    }
+    return BestLanguage;
+}());
diff --git a/tests/baselines/reference/controlFlowPropertyInitializer.symbols b/tests/baselines/reference/controlFlowPropertyInitializer.symbols
new file mode 100644
index 00000000000..70e6c2da8a1
--- /dev/null
+++ b/tests/baselines/reference/controlFlowPropertyInitializer.symbols
@@ -0,0 +1,14 @@
+=== tests/cases/compiler/controlFlowPropertyInitializer.ts ===
+
+// Repro from #8967
+
+const LANG = "Turbo Pascal"
+>LANG : Symbol(LANG, Decl(controlFlowPropertyInitializer.ts, 3, 5))
+
+class BestLanguage {
+>BestLanguage : Symbol(BestLanguage, Decl(controlFlowPropertyInitializer.ts, 3, 27))
+
+    name = LANG;
+>name : Symbol(BestLanguage.name, Decl(controlFlowPropertyInitializer.ts, 5, 20))
+>LANG : Symbol(LANG, Decl(controlFlowPropertyInitializer.ts, 3, 5))
+}
diff --git a/tests/baselines/reference/controlFlowPropertyInitializer.types b/tests/baselines/reference/controlFlowPropertyInitializer.types
new file mode 100644
index 00000000000..d35a4c13698
--- /dev/null
+++ b/tests/baselines/reference/controlFlowPropertyInitializer.types
@@ -0,0 +1,15 @@
+=== tests/cases/compiler/controlFlowPropertyInitializer.ts ===
+
+// Repro from #8967
+
+const LANG = "Turbo Pascal"
+>LANG : string
+>"Turbo Pascal" : string
+
+class BestLanguage {
+>BestLanguage : BestLanguage
+
+    name = LANG;
+>name : string
+>LANG : string
+}
diff --git a/tests/cases/compiler/controlFlowPropertyInitializer.ts b/tests/cases/compiler/controlFlowPropertyInitializer.ts
new file mode 100644
index 00000000000..0b75f280b1d
--- /dev/null
+++ b/tests/cases/compiler/controlFlowPropertyInitializer.ts
@@ -0,0 +1,9 @@
+// @strictNullChecks: true
+
+// Repro from #8967
+
+const LANG = "Turbo Pascal"
+
+class BestLanguage {
+    name = LANG;
+}
\ No newline at end of file

From 18a875807c02fc1e537fbe7a6dd6bded6f8ebd03 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Sun, 5 Jun 2016 15:37:20 -0700
Subject: [PATCH 174/332] Remove restriction on --target es5 and --module es6

---
 src/compiler/diagnosticMessages.json          |  4 ----
 src/compiler/program.ts                       |  5 -----
 .../reference/es5andes6module.errors.txt      | 19 -------------------
 .../reference/es5andes6module.symbols         | 17 +++++++++++++++++
 .../baselines/reference/es5andes6module.types | 18 ++++++++++++++++++
 .../shorthand-property-es5-es6.errors.txt     |  2 --
 6 files changed, 35 insertions(+), 30 deletions(-)
 delete mode 100644 tests/baselines/reference/es5andes6module.errors.txt
 create mode 100644 tests/baselines/reference/es5andes6module.symbols
 create mode 100644 tests/baselines/reference/es5andes6module.types

diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 034bd27b147..108a4fa0889 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -635,10 +635,6 @@
         "category": "Error",
         "code": 1203
     },
-    "Cannot compile modules into 'es2015' when targeting 'ES5' or lower.": {
-        "category": "Error",
-        "code": 1204
-    },
     "Decorators are not valid here.": {
         "category": "Error",
         "code": 1206
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index bab554927e7..fff92d02059 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -2099,11 +2099,6 @@ namespace ts {
                 programDiagnostics.add(createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
             }
 
-            // Cannot specify module gen target of es6 when below es6
-            if (options.module === ModuleKind.ES6 && languageVersion < ScriptTarget.ES6) {
-                programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
-            }
-
             // Cannot specify module gen that isn't amd or system with --out
             if (outFile) {
                 if (options.module && !(options.module === ModuleKind.AMD || options.module === ModuleKind.System)) {
diff --git a/tests/baselines/reference/es5andes6module.errors.txt b/tests/baselines/reference/es5andes6module.errors.txt
deleted file mode 100644
index 6908bfc8ae6..00000000000
--- a/tests/baselines/reference/es5andes6module.errors.txt
+++ /dev/null
@@ -1,19 +0,0 @@
-error TS1204: Cannot compile modules into 'es2015' when targeting 'ES5' or lower.
-
-
-!!! error TS1204: Cannot compile modules into 'es2015' when targeting 'ES5' or lower.
-==== tests/cases/compiler/es5andes6module.ts (0 errors) ====
-    
-    export default class A
-    {
-        constructor ()
-        {
-    
-        }
-    
-        public B()
-        {
-            return 42;
-        }
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/es5andes6module.symbols b/tests/baselines/reference/es5andes6module.symbols
new file mode 100644
index 00000000000..3aef923de0a
--- /dev/null
+++ b/tests/baselines/reference/es5andes6module.symbols
@@ -0,0 +1,17 @@
+=== tests/cases/compiler/es5andes6module.ts ===
+
+export default class A
+>A : Symbol(A, Decl(es5andes6module.ts, 0, 0))
+{
+    constructor ()
+    {
+
+    }
+
+    public B()
+>B : Symbol(A.B, Decl(es5andes6module.ts, 6, 5))
+    {
+        return 42;
+    }
+}
+
diff --git a/tests/baselines/reference/es5andes6module.types b/tests/baselines/reference/es5andes6module.types
new file mode 100644
index 00000000000..14423d87cea
--- /dev/null
+++ b/tests/baselines/reference/es5andes6module.types
@@ -0,0 +1,18 @@
+=== tests/cases/compiler/es5andes6module.ts ===
+
+export default class A
+>A : A
+{
+    constructor ()
+    {
+
+    }
+
+    public B()
+>B : () => number
+    {
+        return 42;
+>42 : number
+    }
+}
+
diff --git a/tests/baselines/reference/shorthand-property-es5-es6.errors.txt b/tests/baselines/reference/shorthand-property-es5-es6.errors.txt
index f491dfbaabe..e54f73a4e61 100644
--- a/tests/baselines/reference/shorthand-property-es5-es6.errors.txt
+++ b/tests/baselines/reference/shorthand-property-es5-es6.errors.txt
@@ -1,8 +1,6 @@
-error TS1204: Cannot compile modules into 'es2015' when targeting 'ES5' or lower.
 tests/cases/compiler/test.ts(2,19): error TS2307: Cannot find module './foo'.
 
 
-!!! error TS1204: Cannot compile modules into 'es2015' when targeting 'ES5' or lower.
 ==== tests/cases/compiler/test.ts (1 errors) ====
     
     import {foo} from './foo';

From f5ab9d7289a459edb695277a812e9d2a6e1a2830 Mon Sep 17 00:00:00 2001
From: york yao <yaoao12306@outlook.com>
Date: Mon, 6 Jun 2016 07:22:37 +0800
Subject: [PATCH 175/332] change type definition for Object.create

---
 src/lib/es5.d.ts | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/src/lib/es5.d.ts b/src/lib/es5.d.ts
index dfd2bd4ff0c..8447b31fc89 100644
--- a/src/lib/es5.d.ts
+++ b/src/lib/es5.d.ts
@@ -136,12 +136,24 @@ interface ObjectConstructor {
       */
     getOwnPropertyNames(o: any): string[];
 
+    /**
+      * Creates an object that has null prototype.
+      * @param o Object to use as a prototype. May be null
+      */
+    create(o: null): any;
+
+    /**
+      * Creates an object that has the specified prototype, and that optionally contains specified properties.
+      * @param o Object to use as a prototype. May be null
+      */
+    create<T>(o: T): T;
+
     /**
       * Creates an object that has the specified prototype, and that optionally contains specified properties.
       * @param o Object to use as a prototype. May be null
       * @param properties JavaScript object that contains one or more property descriptors.
       */
-    create(o: any, properties?: PropertyDescriptorMap): any;
+    create(o: any, properties: PropertyDescriptorMap): any;
 
     /**
       * Adds a property to an object, or modifies attributes of an existing property.

From 2fc2f5c4b975f05e46cf0193b345607ea4983d76 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 6 Jun 2016 07:50:32 -0700
Subject: [PATCH 176/332] Fix signature help

---
 src/compiler/checker.ts                       | 17 +++++----
 ...gCommasInFunctionParametersAndArguments.js | 22 ++++++++++++
 ...asInFunctionParametersAndArguments.symbols | 26 ++++++++++++++
 ...mmasInFunctionParametersAndArguments.types | 35 +++++++++++++++++++
 ...gCommasInFunctionParametersAndArguments.ts | 13 +++++++
 5 files changed, 107 insertions(+), 6 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 402d6455387..524b9b2f505 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -10321,7 +10321,7 @@ namespace ts {
             return -1;
         }
 
-        function hasCorrectArity(node: CallLikeExpression, args: Expression[], signature: Signature) {
+        function hasCorrectArity(node: CallLikeExpression, args: Expression[], signature: Signature, signatureHelpTrailingComma = false) {
             let argCount: number;            // Apparent number of arguments we will have in this call
             let typeArguments: NodeArray<TypeNode>;  // Type arguments (undefined if none)
             let callIsIncomplete: boolean;           // In incomplete call we want to be lenient when we have too few arguments
@@ -10367,7 +10367,7 @@ namespace ts {
                     return signature.minArgumentCount === 0;
                 }
 
-                argCount = args.length;
+                argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
 
                 // If we are missing the close paren, the call is incomplete.
                 callIsIncomplete = (<CallExpression>callExpression).arguments.end === callExpression.end;
@@ -10968,6 +10968,11 @@ namespace ts {
             let resultOfFailedInference: InferenceContext;
             let result: Signature;
 
+            // If we are in signature help, a trailing comma indicates that we intend to provide another argument,
+            // so we will only accept overloads with arity at least 1 higher than the current number of provided arguments.
+            const signatureHelpTrailingComma =
+                candidatesOutArray && node.kind === SyntaxKind.CallExpression && (<CallExpression>node).arguments.hasTrailingComma;
+
             // Section 4.12.1:
             // if the candidate list contains one or more signatures for which the type of each argument
             // expression is a subtype of each corresponding parameter type, the return type of the first
@@ -10979,14 +10984,14 @@ namespace ts {
             // is just important for choosing the best signature. So in the case where there is only one
             // signature, the subtype pass is useless. So skipping it is an optimization.
             if (candidates.length > 1) {
-                result = chooseOverload(candidates, subtypeRelation);
+                result = chooseOverload(candidates, subtypeRelation, signatureHelpTrailingComma);
             }
             if (!result) {
                 // Reinitialize these pointers for round two
                 candidateForArgumentError = undefined;
                 candidateForTypeArgumentError = undefined;
                 resultOfFailedInference = undefined;
-                result = chooseOverload(candidates, assignableRelation);
+                result = chooseOverload(candidates, assignableRelation, signatureHelpTrailingComma);
             }
             if (result) {
                 return result;
@@ -11057,9 +11062,9 @@ namespace ts {
                 diagnostics.add(createDiagnosticForNodeFromMessageChain(node, errorInfo));
             }
 
-            function chooseOverload(candidates: Signature[], relation: Map<RelationComparisonResult>) {
+            function chooseOverload(candidates: Signature[], relation: Map<RelationComparisonResult>, signatureHelpTrailingComma = false) {
                 for (const originalCandidate of candidates) {
-                    if (!hasCorrectArity(node, args, originalCandidate)) {
+                    if (!hasCorrectArity(node, args, originalCandidate, signatureHelpTrailingComma)) {
                         continue;
                     }
 
diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
index a9b173f9db2..87c925fb22b 100644
--- a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
@@ -6,6 +6,19 @@ f1(1,);
 function f2(...args,) {}
 
 f2(...[],);
+
+// Not confused by overloads
+declare function f3(x, ): number;
+declare function f3(x, y,): string;
+
+<number>f3(1,);
+<string>f3(1, 2,);
+
+// Works for constructors too
+class X {
+    constructor(a,) { }
+}
+new X(1,);
 
 
 //// [trailingCommasInFunctionParametersAndArguments.js]
@@ -18,3 +31,12 @@ function f2() {
     }
 }
 f2.apply(void 0, []);
+f3(1);
+f3(1, 2);
+// Works for constructors too
+var X = (function () {
+    function X(a) {
+    }
+    return X;
+}());
+new X(1);
diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols
index dd9ce5319c9..b146d230bac 100644
--- a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols
@@ -13,3 +13,29 @@ function f2(...args,) {}
 f2(...[],);
 >f2 : Symbol(f2, Decl(trailingCommasInFunctionParametersAndArguments.ts, 2, 7))
 
+// Not confused by overloads
+declare function f3(x, ): number;
+>f3 : Symbol(f3, Decl(trailingCommasInFunctionParametersAndArguments.ts, 6, 11), Decl(trailingCommasInFunctionParametersAndArguments.ts, 9, 33))
+>x : Symbol(x, Decl(trailingCommasInFunctionParametersAndArguments.ts, 9, 20))
+
+declare function f3(x, y,): string;
+>f3 : Symbol(f3, Decl(trailingCommasInFunctionParametersAndArguments.ts, 6, 11), Decl(trailingCommasInFunctionParametersAndArguments.ts, 9, 33))
+>x : Symbol(x, Decl(trailingCommasInFunctionParametersAndArguments.ts, 10, 20))
+>y : Symbol(y, Decl(trailingCommasInFunctionParametersAndArguments.ts, 10, 22))
+
+<number>f3(1,);
+>f3 : Symbol(f3, Decl(trailingCommasInFunctionParametersAndArguments.ts, 6, 11), Decl(trailingCommasInFunctionParametersAndArguments.ts, 9, 33))
+
+<string>f3(1, 2,);
+>f3 : Symbol(f3, Decl(trailingCommasInFunctionParametersAndArguments.ts, 6, 11), Decl(trailingCommasInFunctionParametersAndArguments.ts, 9, 33))
+
+// Works for constructors too
+class X {
+>X : Symbol(X, Decl(trailingCommasInFunctionParametersAndArguments.ts, 13, 18))
+
+    constructor(a,) { }
+>a : Symbol(a, Decl(trailingCommasInFunctionParametersAndArguments.ts, 17, 16))
+}
+new X(1,);
+>X : Symbol(X, Decl(trailingCommasInFunctionParametersAndArguments.ts, 13, 18))
+
diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types
index 0a8d34d1df2..36de78fc8b8 100644
--- a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types
@@ -18,3 +18,38 @@ f2(...[],);
 >...[] : undefined
 >[] : undefined[]
 
+// Not confused by overloads
+declare function f3(x, ): number;
+>f3 : { (x: any): number; (x: any, y: any): string; }
+>x : any
+
+declare function f3(x, y,): string;
+>f3 : { (x: any): number; (x: any, y: any): string; }
+>x : any
+>y : any
+
+<number>f3(1,);
+><number>f3(1,) : number
+>f3(1,) : number
+>f3 : { (x: any): number; (x: any, y: any): string; }
+>1 : number
+
+<string>f3(1, 2,);
+><string>f3(1, 2,) : string
+>f3(1, 2,) : string
+>f3 : { (x: any): number; (x: any, y: any): string; }
+>1 : number
+>2 : number
+
+// Works for constructors too
+class X {
+>X : X
+
+    constructor(a,) { }
+>a : any
+}
+new X(1,);
+>new X(1,) : X
+>X : typeof X
+>1 : number
+
diff --git a/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts b/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
index 4b628e7e559..9c21d7f24ea 100644
--- a/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
+++ b/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
@@ -5,3 +5,16 @@ f1(1,);
 function f2(...args,) {}
 
 f2(...[],);
+
+// Not confused by overloads
+declare function f3(x, ): number;
+declare function f3(x, y,): string;
+
+<number>f3(1,);
+<string>f3(1, 2,);
+
+// Works for constructors too
+class X {
+    constructor(a,) { }
+}
+new X(1,);

From f83248880140e0a6fe620082e7f04f39a80ea1d9 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 6 Jun 2016 08:14:49 -0700
Subject: [PATCH 177/332] Add "implicit any" warning for shorthand ambient
 modules

---
 src/compiler/checker.ts                                   | 6 ++++++
 .../reference/ambientShorthand_isImplicitAny.errors.txt   | 8 ++++++++
 .../baselines/reference/ambientShorthand_isImplicitAny.js | 5 +++++
 .../conformance/ambient/ambientShorthand_isImplicitAny.ts | 2 ++
 4 files changed, 21 insertions(+)
 create mode 100644 tests/baselines/reference/ambientShorthand_isImplicitAny.errors.txt
 create mode 100644 tests/baselines/reference/ambientShorthand_isImplicitAny.js
 create mode 100644 tests/cases/conformance/ambient/ambientShorthand_isImplicitAny.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index c28502907d7..10cdd6126b2 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -16048,6 +16048,12 @@ namespace ts {
                     }
                 }
             }
+
+            if (compilerOptions.noImplicitAny && !node.body) {
+                // Ambient shorthand module is an implicit any
+                reportImplicitAnyError(node, anyType);
+            }
+
             if (node.body) {
                 checkSourceElement(node.body);
             }
diff --git a/tests/baselines/reference/ambientShorthand_isImplicitAny.errors.txt b/tests/baselines/reference/ambientShorthand_isImplicitAny.errors.txt
new file mode 100644
index 00000000000..875a656202d
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_isImplicitAny.errors.txt
@@ -0,0 +1,8 @@
+tests/cases/conformance/ambient/ambientShorthand_isImplicitAny.ts(1,16): error TS7005: Variable '"jquery"' implicitly has an 'any' type.
+
+
+==== tests/cases/conformance/ambient/ambientShorthand_isImplicitAny.ts (1 errors) ====
+    declare module "jquery";
+                   ~~~~~~~~
+!!! error TS7005: Variable '"jquery"' implicitly has an 'any' type.
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/ambientShorthand_isImplicitAny.js b/tests/baselines/reference/ambientShorthand_isImplicitAny.js
new file mode 100644
index 00000000000..ab05d2a9979
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_isImplicitAny.js
@@ -0,0 +1,5 @@
+//// [ambientShorthand_isImplicitAny.ts]
+declare module "jquery";
+
+
+//// [ambientShorthand_isImplicitAny.js]
diff --git a/tests/cases/conformance/ambient/ambientShorthand_isImplicitAny.ts b/tests/cases/conformance/ambient/ambientShorthand_isImplicitAny.ts
new file mode 100644
index 00000000000..bf7de709ef2
--- /dev/null
+++ b/tests/cases/conformance/ambient/ambientShorthand_isImplicitAny.ts
@@ -0,0 +1,2 @@
+// @noImplicitAny: true
+declare module "jquery";

From 543b484ec52371faae2c0ecb8aeba28de5e3695f Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Fri, 3 Jun 2016 09:33:17 -0700
Subject: [PATCH 178/332] Remove trailing whitespace

---
 src/compiler/checker.ts                      | 18 +++++++++---------
 src/compiler/declarationEmitter.ts           |  6 +++---
 src/compiler/sourcemap.ts                    |  2 +-
 src/compiler/utilities.ts                    |  4 ++--
 src/harness/projectsRunner.ts                |  2 +-
 src/harness/runnerbase.ts                    |  2 +-
 src/services/breakpoints.ts                  | 18 +++++++++---------
 src/services/formatting/formattingScanner.ts |  4 ++--
 src/services/formatting/rules.ts             |  6 +++---
 src/services/formatting/rulesMap.ts          |  4 ++--
 src/services/navigateTo.ts                   |  6 +++---
 src/services/services.ts                     |  6 +++---
 src/services/shims.ts                        |  4 ++--
 src/services/signatureHelp.ts                | 16 ++++++++--------
 14 files changed, 49 insertions(+), 49 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index c538134e6d8..01945252e55 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -11269,7 +11269,7 @@ namespace ts {
             const declaringClassDeclaration = <ClassLikeDeclaration>getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
             const declaringClass = <InterfaceType>getDeclaredTypeOfSymbol(declaration.parent.symbol);
 
-            // A private or protected constructor can only be instantiated within it's own class 
+            // A private or protected constructor can only be instantiated within it's own class
             if (!isNodeWithinClass(node, declaringClassDeclaration)) {
                 if (flags & NodeFlags.Private) {
                     error(node, Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
@@ -16132,12 +16132,12 @@ namespace ts {
             const symbol = getSymbolOfNode(node);
             const target = resolveAlias(symbol);
             if (target !== unknownSymbol) {
-                // For external modules symbol represent local symbol for an alias. 
+                // For external modules symbol represent local symbol for an alias.
                 // This local symbol will merge any other local declarations (excluding other aliases)
                 // and symbol.flags will contains combined representation for all merged declaration.
                 // Based on symbol.flags we can compute a set of excluded meanings (meaning that resolved alias should not have,
-                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export* 
-                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names). 
+                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export*
+                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names).
                 const excludedMeanings =
                     (symbol.flags & (SymbolFlags.Value | SymbolFlags.ExportValue) ? SymbolFlags.Value : 0) |
                     (symbol.flags & SymbolFlags.Type ? SymbolFlags.Type : 0) |
@@ -16336,7 +16336,7 @@ namespace ts {
                         continue;
                     }
                     const { declarations, flags } = exports[id];
-                    // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries. 
+                    // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries.
                     // (TS Exceptions: namespaces, function overloads, enums, and interfaces)
                     if (flags & (SymbolFlags.Namespace | SymbolFlags.Interface | SymbolFlags.Enum)) {
                         continue;
@@ -17041,10 +17041,10 @@ namespace ts {
         }
 
         // Gets the type of object literal or array literal of destructuring assignment.
-        // { a } from 
+        // { a } from
         //     for ( { a } of elems) {
         //     }
-        // [ a ] from 
+        // [ a ] from
         //     [a] = [ some array ...]
         function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr: Expression): Type {
             Debug.assert(expr.kind === SyntaxKind.ObjectLiteralExpression || expr.kind === SyntaxKind.ArrayLiteralExpression);
@@ -17077,10 +17077,10 @@ namespace ts {
         }
 
         // Gets the property symbol corresponding to the property in destructuring assignment
-        // 'property1' from 
+        // 'property1' from
         //     for ( { property1: a } of elems) {
         //     }
-        // 'property1' at location 'a' from: 
+        // 'property1' at location 'a' from:
         //     [a] = [ property1, property2 ]
         function getPropertySymbolOfDestructuringAssignment(location: Identifier) {
             // Get the type of the object or array literal and then look for property of given name in the type
diff --git a/src/compiler/declarationEmitter.ts b/src/compiler/declarationEmitter.ts
index 397b135bf23..bda1c7c0cb6 100644
--- a/src/compiler/declarationEmitter.ts
+++ b/src/compiler/declarationEmitter.ts
@@ -95,7 +95,7 @@ namespace ts {
                     // Emit reference in dts, if the file reference was not already emitted
                     if (referencedFile && !contains(emittedReferencedFiles, referencedFile)) {
                         // Add a reference to generated dts file,
-                        // global file reference is added only 
+                        // global file reference is added only
                         //  - if it is not bundled emit (because otherwise it would be self reference)
                         //  - and it is not already added
                         if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference)) {
@@ -148,7 +148,7 @@ namespace ts {
 
             if (!isBundledEmit && isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
                 // if file was external module with augmentations - this fact should be preserved in .d.ts as well.
-                // in case if we didn't write any external module specifiers in .d.ts we need to emit something 
+                // in case if we didn't write any external module specifiers in .d.ts we need to emit something
                 // that will force compiler to think that this file is an external module - 'export {}' is a reasonable choice here.
                 write("export {};");
                 writeLine();
@@ -766,7 +766,7 @@ namespace ts {
 
         function emitExternalModuleSpecifier(parent: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration) {
             // emitExternalModuleSpecifier is usually called when we emit something in the.d.ts file that will make it an external module (i.e. import/export declarations).
-            // the only case when it is not true is when we call it to emit correct name for module augmentation - d.ts files with just module augmentations are not considered 
+            // the only case when it is not true is when we call it to emit correct name for module augmentation - d.ts files with just module augmentations are not considered
             // external modules since they are indistinguishable from script files with ambient modules. To fix this in such d.ts files we'll emit top level 'export {}'
             // so compiler will treat them as external modules.
             resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== SyntaxKind.ModuleDeclaration;
diff --git a/src/compiler/sourcemap.ts b/src/compiler/sourcemap.ts
index 86bad38cb6e..cf7c3d1eaae 100644
--- a/src/compiler/sourcemap.ts
+++ b/src/compiler/sourcemap.ts
@@ -168,7 +168,7 @@ namespace ts {
                     sourceMapData.sourceMapDecodedMappings[sourceMapData.sourceMapDecodedMappings.length - 1] :
                     defaultLastEncodedSourceMapSpan;
 
-                // TODO: Update lastEncodedNameIndex 
+                // TODO: Update lastEncodedNameIndex
                 // Since we dont support this any more, lets not worry about it right now.
                 // When we start supporting nameIndex, we will get back to this
 
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 74ea3459b23..d246b55556c 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -302,8 +302,8 @@ namespace ts {
             return getTokenPosOfNode(node.jsDocComments[0]);
         }
 
-        // For a syntax list, it is possible that one of its children has JSDocComment nodes, while 
-        // the syntax list itself considers them as normal trivia. Therefore if we simply skip 
+        // For a syntax list, it is possible that one of its children has JSDocComment nodes, while
+        // the syntax list itself considers them as normal trivia. Therefore if we simply skip
         // trivia for the list, we may have skipped the JSDocComment as well. So we should process its
         // first child to determine the actual position of its first token.
         if (node.kind === SyntaxKind.SyntaxList && (<SyntaxList>node)._children.length > 0) {
diff --git a/src/harness/projectsRunner.ts b/src/harness/projectsRunner.ts
index 60a0813b05d..64d07b1d88a 100644
--- a/src/harness/projectsRunner.ts
+++ b/src/harness/projectsRunner.ts
@@ -244,7 +244,7 @@ class ProjectRunner extends RunnerBase {
                     mapRoot: testCase.resolveMapRoot && testCase.mapRoot ? Harness.IO.resolvePath(testCase.mapRoot) : testCase.mapRoot,
                     sourceRoot: testCase.resolveSourceRoot && testCase.sourceRoot ? Harness.IO.resolvePath(testCase.sourceRoot) : testCase.sourceRoot,
                     module: moduleKind,
-                    moduleResolution: ts.ModuleResolutionKind.Classic, // currently all tests use classic module resolution kind, this will change in the future 
+                    moduleResolution: ts.ModuleResolutionKind.Classic, // currently all tests use classic module resolution kind, this will change in the future
                 };
                 // Set the values specified using json
                 const optionNameMap: ts.Map<ts.CommandLineOption> = {};
diff --git a/src/harness/runnerbase.ts b/src/harness/runnerbase.ts
index 81da0907714..a16eddcbeec 100644
--- a/src/harness/runnerbase.ts
+++ b/src/harness/runnerbase.ts
@@ -24,7 +24,7 @@ abstract class RunnerBase {
 
     abstract enumerateTestFiles(): string[];
 
-    /** Setup the runner's tests so that they are ready to be executed by the harness 
+    /** Setup the runner's tests so that they are ready to be executed by the harness
      *  The first test should be a describe/it block that sets up the harness's compiler instance appropriately
      */
     public abstract initializeTests(): void;
diff --git a/src/services/breakpoints.ts b/src/services/breakpoints.ts
index 12b127ffd2d..fea4ae6bffa 100644
--- a/src/services/breakpoints.ts
+++ b/src/services/breakpoints.ts
@@ -1,4 +1,4 @@
-// Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0. 
+// Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0.
 // See LICENSE.txt in the project root for complete license information.
 
 /// <reference path='services.ts' />
@@ -19,8 +19,8 @@ namespace ts.BreakpointResolver {
         if (sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getStart(sourceFile)).line > lineOfPosition) {
             // Get previous token if the token is returned starts on new line
             // eg: let x =10; |--- cursor is here
-            //     let y = 10; 
-            // token at position will return let keyword on second line as the token but we would like to use 
+            //     let y = 10;
+            // token at position will return let keyword on second line as the token but we would like to use
             // token on same line if trailing trivia (comments or white spaces on same line) part of the last token on that line
             tokenAtLocation = findPrecedingToken(tokenAtLocation.pos, sourceFile);
 
@@ -261,7 +261,7 @@ namespace ts.BreakpointResolver {
                         }
 
                         // Set breakpoint on identifier element of destructuring pattern
-                        // a or ...c  or d: x from 
+                        // a or ...c  or d: x from
                         // [a, b, ...c] or { a, b } or { d: x } from destructuring pattern
                         if ((node.kind === SyntaxKind.Identifier ||
                             node.kind == SyntaxKind.SpreadElementExpression ||
@@ -275,7 +275,7 @@ namespace ts.BreakpointResolver {
                             const binaryExpression = <BinaryExpression>node;
                             // Set breakpoint in destructuring pattern if its destructuring assignment
                             // [a, b, c] or {a, b, c} of
-                            // [a, b, c] = expression or 
+                            // [a, b, c] = expression or
                             // {a, b, c} = expression
                             if (isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left)) {
                                 return spanInArrayLiteralOrObjectLiteralDestructuringPattern(
@@ -285,8 +285,8 @@ namespace ts.BreakpointResolver {
                             if (binaryExpression.operatorToken.kind === SyntaxKind.EqualsToken &&
                                 isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.parent)) {
                                 // Set breakpoint on assignment expression element of destructuring pattern
-                                // a = expression of 
-                                // [a = expression, b, c] = someExpression or 
+                                // a = expression of
+                                // [a = expression, b, c] = someExpression or
                                 // { a = expression, b, c } = someExpression
                                 return textSpan(node);
                             }
@@ -403,7 +403,7 @@ namespace ts.BreakpointResolver {
                 const declarations = variableDeclaration.parent.declarations;
                 if (declarations && declarations[0] !== variableDeclaration) {
                     // If we cannot set breakpoint on this declaration, set it on previous one
-                    // Because the variable declaration may be binding pattern and 
+                    // Because the variable declaration may be binding pattern and
                     // we would like to set breakpoint in last binding element if that's the case,
                     // use preceding token instead
                     return spanInNode(findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent));
@@ -549,7 +549,7 @@ namespace ts.BreakpointResolver {
                     return spanInNode(firstBindingElement);
                 }
 
-                // Could be ArrayLiteral from destructuring assignment or 
+                // Could be ArrayLiteral from destructuring assignment or
                 // just nested element in another destructuring assignment
                 // set breakpoint on assignment when parent is destructuring assignment
                 // Otherwise set breakpoint for this element
diff --git a/src/services/formatting/formattingScanner.ts b/src/services/formatting/formattingScanner.ts
index ff003e08007..babf0db3fd5 100644
--- a/src/services/formatting/formattingScanner.ts
+++ b/src/services/formatting/formattingScanner.ts
@@ -268,9 +268,9 @@ namespace ts.formatting {
             return startPos < endPos && current !== SyntaxKind.EndOfFileToken && !isTrivia(current);
         }
 
-        // when containing node in the tree is token 
+        // when containing node in the tree is token
         // but its kind differs from the kind that was returned by the scanner,
-        // then kind needs to be fixed. This might happen in cases 
+        // then kind needs to be fixed. This might happen in cases
         // when parser interprets token differently, i.e keyword treated as identifier
         function fixTokenKind(tokenInfo: TokenInfo, container: Node): TokenInfo {
             if (isToken(container) && tokenInfo.token.kind !== container.kind) {
diff --git a/src/services/formatting/rules.ts b/src/services/formatting/rules.ts
index 47a204a5b7e..b4916025af2 100644
--- a/src/services/formatting/rules.ts
+++ b/src/services/formatting/rules.ts
@@ -554,17 +554,17 @@ namespace ts.formatting {
         static IsSameLineTokenOrBeforeMultilineBlockContext(context: FormattingContext): boolean {
             //// This check is mainly used inside SpaceBeforeOpenBraceInControl and SpaceBeforeOpenBraceInFunction.
             ////
-            //// Ex: 
+            //// Ex:
             //// if (1)     { ....
             ////      * ) and { are on the same line so apply the rule. Here we don't care whether it's same or multi block context
             ////
-            //// Ex: 
+            //// Ex:
             //// if (1)
             //// { ... }
             ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we don't format.
             ////
             //// Ex:
-            //// if (1) 
+            //// if (1)
             //// { ...
             //// }
             ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we format.
diff --git a/src/services/formatting/rulesMap.ts b/src/services/formatting/rulesMap.ts
index 7f635ea07e3..703ca566bd2 100644
--- a/src/services/formatting/rulesMap.ts
+++ b/src/services/formatting/rulesMap.ts
@@ -95,9 +95,9 @@ namespace ts.formatting {
             ////    4- Context rules with any token combination
             ////    5- Non-context rules with specific token combination
             ////    6- Non-context rules with any token combination
-            //// 
+            ////
             //// The member rulesInsertionIndexBitmap is used to describe the number of rules
-            //// in each sub-bucket (above) hence can be used to know the index of where to insert 
+            //// in each sub-bucket (above) hence can be used to know the index of where to insert
             //// the next rule. It's a bitmap which contains 6 different sections each is given 5 bits.
             ////
             //// Example:
diff --git a/src/services/navigateTo.ts b/src/services/navigateTo.ts
index 49707263c1f..e9afb6925b5 100644
--- a/src/services/navigateTo.ts
+++ b/src/services/navigateTo.ts
@@ -9,7 +9,7 @@ namespace ts.NavigateTo {
         // This means "compare in a case insensitive manner."
         const baseSensitivity: Intl.CollatorOptions = { sensitivity: "base" };
 
-        // Search the declarations in all files and output matched NavigateToItem into array of NavigateToItem[] 
+        // Search the declarations in all files and output matched NavigateToItem into array of NavigateToItem[]
         forEach(program.getSourceFiles(), sourceFile => {
             cancellationToken.throwIfCancellationRequested();
 
@@ -17,7 +17,7 @@ namespace ts.NavigateTo {
             for (const name in nameToDeclarations) {
                 const declarations = getProperty(nameToDeclarations, name);
                 if (declarations) {
-                    // First do a quick check to see if the name of the declaration matches the 
+                    // First do a quick check to see if the name of the declaration matches the
                     // last portion of the (possibly) dotted name they're searching for.
                     let matches = patternMatcher.getMatchesForLastSegmentOfPattern(name);
 
@@ -26,7 +26,7 @@ namespace ts.NavigateTo {
                     }
 
                     for (const declaration of declarations) {
-                        // It was a match!  If the pattern has dots in it, then also see if the 
+                        // It was a match!  If the pattern has dots in it, then also see if the
                         // declaration container matches as well.
                         if (patternMatcher.patternContainsDots) {
                             const containers = getContainers(declaration);
diff --git a/src/services/services.ts b/src/services/services.ts
index 90740b257c6..34b521b3496 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -2657,7 +2657,7 @@ namespace ts {
         return false;
     }
 
-    /** 
+    /**
      * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
      */
     function getContainingObjectLiteralElement(node: Node): ObjectLiteralElement {
@@ -7604,11 +7604,11 @@ namespace ts {
 
         function isValidBraceCompletionAtPostion(fileName: string, position: number, openingBrace: number): boolean {
 
-            // '<' is currently not supported, figuring out if we're in a Generic Type vs. a comparison is too 
+            // '<' is currently not supported, figuring out if we're in a Generic Type vs. a comparison is too
             // expensive to do during typing scenarios
             // i.e. whether we're dealing with:
             //      var x = new foo<| ( with class foo<T>{} )
-            // or 
+            // or
             //      var y = 3 <|
             if (openingBrace === CharacterCodes.lessThan) {
                 return false;
diff --git a/src/services/shims.ts b/src/services/shims.ts
index eb9c28ff7ac..94ff3367e3c 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -295,7 +295,7 @@ namespace ts {
 
         constructor(private shimHost: LanguageServiceShimHost) {
             // if shimHost is a COM object then property check will become method call with no arguments.
-            // 'in' does not have this effect. 
+            // 'in' does not have this effect.
             if ("getModuleResolutionsForFile" in this.shimHost) {
                 this.resolveModuleNames = (moduleNames: string[], containingFile: string) => {
                     const resolutionsInFile = <Map<string>>JSON.parse(this.shimHost.getModuleResolutionsForFile(containingFile));
@@ -966,7 +966,7 @@ namespace ts {
             return this.forwardJSONCall(
                 "getPreProcessedFileInfo('" + fileName + "')",
                 () => {
-                    // for now treat files as JavaScript 
+                    // for now treat files as JavaScript
                     const result = preProcessFile(sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength()), /* readImportFiles */ true, /* detectJavaScriptImports */ true);
                     return {
                         referencedFiles: this.convertFileReferences(result.referencedFiles),
diff --git a/src/services/signatureHelp.ts b/src/services/signatureHelp.ts
index 53fb7a474a7..27077406489 100644
--- a/src/services/signatureHelp.ts
+++ b/src/services/signatureHelp.ts
@@ -3,9 +3,9 @@
 namespace ts.SignatureHelp {
 
     // A partially written generic type expression is not guaranteed to have the correct syntax tree. the expression could be parsed as less than/greater than expression or a comma expression
-    // or some other combination depending on what the user has typed so far. For the purposes of signature help we need to consider any location after "<" as a possible generic type reference. 
-    // To do this, the method will back parse the expression starting at the position required. it will try to parse the current expression as a generic type expression, if it did succeed it 
-    // will return the generic identifier that started the expression (e.g. "foo" in "foo<any, |"). It is then up to the caller to ensure that this is a valid generic expression through 
+    // or some other combination depending on what the user has typed so far. For the purposes of signature help we need to consider any location after "<" as a possible generic type reference.
+    // To do this, the method will back parse the expression starting at the position required. it will try to parse the current expression as a generic type expression, if it did succeed it
+    // will return the generic identifier that started the expression (e.g. "foo" in "foo<any, |"). It is then up to the caller to ensure that this is a valid generic expression through
     // looking up the type. The method will also keep track of the parameter index inside the expression.
     // public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
     //    let token = Syntax.findTokenOnLeft(syntaxTree.sourceUnit(), position, /*includeSkippedTokens*/ true);
@@ -202,7 +202,7 @@ namespace ts.SignatureHelp {
         cancellationToken.throwIfCancellationRequested();
 
         if (!candidates.length) {
-            // We didn't have any sig help items produced by the TS compiler.  If this is a JS 
+            // We didn't have any sig help items produced by the TS compiler.  If this is a JS
             // file, then see if we can figure out anything better.
             if (isSourceFileJavaScript(sourceFile)) {
                 return createJavaScriptSignatureHelpItems(argumentInfo);
@@ -353,8 +353,8 @@ namespace ts.SignatureHelp {
         }
 
         function getArgumentIndex(argumentsList: Node, node: Node) {
-            // The list we got back can include commas.  In the presence of errors it may 
-            // also just have nodes without commas.  For example "Foo(a b c)" will have 3 
+            // The list we got back can include commas.  In the presence of errors it may
+            // also just have nodes without commas.  For example "Foo(a b c)" will have 3
             // args without commas.   We want to find what index we're at.  So we count
             // forward until we hit ourselves, only incrementing the index if it isn't a
             // comma.
@@ -386,8 +386,8 @@ namespace ts.SignatureHelp {
             // 'a' '<comma>'.  So, in the case where the last child is a comma, we increase the
             // arg count by one to compensate.
             //
-            // Note: this subtlety only applies to the last comma.  If you had "Foo(a,,"  then 
-            // we'll have:  'a' '<comma>' '<missing>' 
+            // Note: this subtlety only applies to the last comma.  If you had "Foo(a,,"  then
+            // we'll have:  'a' '<comma>' '<missing>'
             // That will give us 2 non-commas.  We then add one for the last comma, givin us an
             // arg count of 3.
             const listChildren = argumentsList.getChildren();

From d9ec5125bed869d848586ab9610395d8c78a7dc1 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 6 Jun 2016 11:29:03 -0700
Subject: [PATCH 179/332] Support using string values in enums for
 CompilerOptions in transpile methods

---
 src/compiler/commandLineParser.ts  |  2 +-
 src/services/services.ts           | 36 +++++++++++++++++++++++++++---
 tests/cases/unittests/transpile.ts | 33 ++++++++++++++++++++-------
 3 files changed, 59 insertions(+), 12 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 506a2d5bee4..55e7a2a3a2f 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -6,7 +6,7 @@
 
 namespace ts {
     /* @internal */
-    export let optionDeclarations: CommandLineOption[] = [
+    export const optionDeclarations: CommandLineOption[] = [
         {
             name: "charset",
             type: "string",
diff --git a/src/services/services.ts b/src/services/services.ts
index 34b521b3496..2664c430912 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1920,6 +1920,36 @@ namespace ts {
         sourceMapText?: string;
     }
 
+    /** JS users may pass in string values for enum compiler options (such as ModuleKind), so convert. */
+    function fixupCompilerOptions(options: CompilerOptions, diagnostics: Diagnostic[]) {
+        options = clone(options);
+
+        for (const opt of stringValuedEnums) {
+            if (!hasProperty(options, opt.name)) {
+                continue;
+            }
+
+            const value = options[opt.name];
+            // Value should be a key of opt.type
+            if (typeof value === "string") {
+                // If value is not a string, this will fail
+                options[opt.name] = parseCustomTypeOption(opt, value, diagnostics);
+            }
+            else {
+                if (!forEachValue(opt.type, v => v === value)) {
+                    // Supplied value isn't a valid enum value.
+                    diagnostics.push(createCompilerDiagnosticForInvalidCustomType(opt));
+                }
+            }
+        }
+
+        return options;
+    }
+
+    const stringValuedEnums = <CommandLineOptionOfCustomType[]>filter(optionDeclarations, o => {
+        return typeof o.type === "object" && !forEachValue(<Map<any>> o.type, v => typeof v !== "number");
+    });
+
     /*
      * This function will compile source text from 'input' argument using specified compiler options.
      * If not options are provided - it will use a set of default compiler options.
@@ -1930,7 +1960,9 @@ namespace ts {
      * - noResolve = true
      */
     export function transpileModule(input: string, transpileOptions: TranspileOptions): TranspileOutput {
-        const options = transpileOptions.compilerOptions ? clone(transpileOptions.compilerOptions) : getDefaultCompilerOptions();
+        const diagnostics: Diagnostic[] = [];
+
+        const options: CompilerOptions = transpileOptions.compilerOptions ? fixupCompilerOptions(transpileOptions.compilerOptions, diagnostics) : getDefaultCompilerOptions();
 
         options.isolatedModules = true;
 
@@ -1988,9 +2020,7 @@ namespace ts {
 
         const program = createProgram([inputFileName], options, compilerHost);
 
-        let diagnostics: Diagnostic[];
         if (transpileOptions.reportDiagnostics) {
-            diagnostics = [];
             addRange(/*to*/ diagnostics, /*from*/ program.getSyntacticDiagnostics(sourceFile));
             addRange(/*to*/ diagnostics, /*from*/ program.getOptionsDiagnostics());
         }
diff --git a/tests/cases/unittests/transpile.ts b/tests/cases/unittests/transpile.ts
index 904cc435c44..ca2c5939f35 100644
--- a/tests/cases/unittests/transpile.ts
+++ b/tests/cases/unittests/transpile.ts
@@ -9,11 +9,7 @@ namespace ts {
             expectedDiagnosticCodes?: number[];
         }
 
-        function checkDiagnostics(diagnostics: Diagnostic[], expectedDiagnosticCodes?: number[]) {
-            if (!expectedDiagnosticCodes) {
-                return;
-            }
-
+        function checkDiagnostics(diagnostics: Diagnostic[], expectedDiagnosticCodes: number[] = []) {
             for (let i = 0; i < expectedDiagnosticCodes.length; i++) {
                 assert.equal(expectedDiagnosticCodes[i], diagnostics[i] && diagnostics[i].code, `Could not find expeced diagnostic.`);
             }
@@ -26,7 +22,7 @@ namespace ts {
             if (!transpileOptions.compilerOptions) {
                 transpileOptions.compilerOptions = {};
             }
-            if (transpileOptions.compilerOptions.newLine === undefined) { // 
+            if (transpileOptions.compilerOptions.newLine === undefined) {
                 // use \r\n as default new line
                 transpileOptions.compilerOptions.newLine = ts.NewLineKind.CarriageReturnLineFeed;
             }
@@ -292,13 +288,34 @@ var x = 0;`,
             const output = `"use strict";\nvar a = 10;\n`;
             test(input, {
                 expectedOutput: output,
-                options: { compilerOptions: { newLine: NewLineKind.LineFeed, module: ModuleKind.CommonJS }, fileName: "input.js", reportDiagnostics: true },
-                expectedDiagnosticCodes: []
+                options: { compilerOptions: { newLine: NewLineKind.LineFeed, module: ModuleKind.CommonJS }, fileName: "input.js", reportDiagnostics: true }
             });
         });
 
         it("Supports urls in file name", () => {
             test("var x", { expectedOutput: `"use strict";\r\nvar x;\r\n`, options: { fileName: "http://somewhere/directory//directory2/file.ts" } });
         });
+
+        describe("String values for enums", () => {
+            it("Accepts strings instead of enum values", () => {
+                test(`export const x = 0`, {
+                    options: {
+                        compilerOptions: {
+                            module: <ModuleKind><any>"es6",
+                            // Capitalization and spaces ignored
+                            target: <ScriptTarget><any>" Es6 "
+                        }
+                    },
+                    expectedOutput: "export const x = 0;\r\n"
+                });
+            });
+
+            it("Fails on bad value", () => {
+                test(``, {
+                    options: { compilerOptions: { module: <ModuleKind><any>{} } },
+                    expectedDiagnosticCodes: [6046]
+                });
+            });
+        });
     });
 }

From e05e11200bb581852c7a0de5b89995200c48fc01 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 6 Jun 2016 11:37:59 -0700
Subject: [PATCH 180/332] Remove trailing whitespace in jakefile

---
 Jakefile.js | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/Jakefile.js b/Jakefile.js
index c4f56c559f3..5da617e2348 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -208,7 +208,7 @@ var librarySourceMap = [
         { target: "lib.es2015.d.ts", sources: ["header.d.ts", "es2015.d.ts"] },
         { target: "lib.es2016.d.ts", sources: ["header.d.ts", "es2016.d.ts"] },
         { target: "lib.es2017.d.ts", sources: ["header.d.ts", "es2017.d.ts"] },
-        
+
         // JavaScript + all host library
         { target: "lib.d.ts", sources: ["header.d.ts", "es5.d.ts"].concat(hostsLibrarySources) },
         { target: "lib.es6.d.ts", sources: ["header.d.ts", "es5.d.ts"].concat(es2015LibrarySources, hostsLibrarySources, "dom.iterable.d.ts") }
@@ -521,7 +521,7 @@ compileFile(servicesFileInBrowserTest, servicesSources,[builtLocalDirectory, cop
                 var i = content.lastIndexOf("\n");
                 fs.writeFileSync(servicesFileInBrowserTest, content.substring(0, i) + "\r\n//# sourceURL=../built/local/typeScriptServices.js" + content.substring(i));
             });
-    
+
 
 var serverFile = path.join(builtLocalDirectory, "tsserver.js");
 compileFile(serverFile, serverSources,[builtLocalDirectory, copyright].concat(serverSources), /*prefixes*/ [copyright], /*useBuiltCompiler*/ true);
@@ -741,10 +741,10 @@ function runConsoleTests(defaultReporter, runInParallel) {
         }, function(e, status) {
             finish(status);
         });
-        
+
     }
     else {
-        // run task to load all tests and partition them between workers 
+        // run task to load all tests and partition them between workers
         var cmd = "mocha " + " -R min " + colors + run;
         console.log(cmd);
         exec(cmd, function() {
@@ -757,9 +757,9 @@ function runConsoleTests(defaultReporter, runInParallel) {
                 var configPath = path.join(taskConfigsFolder, f);
                 var workerCmd = "mocha" + " -t " + testTimeout + " -R " + reporter + " " + colors + " " + run + " --config='" + configPath + "'";
                 console.log(workerCmd);
-                exec(workerCmd,  finishWorker, finishWorker) 
+                exec(workerCmd,  finishWorker, finishWorker)
             });
-            
+
             function finishWorker(e, errorStatus) {
                 counter--;
                 if (firstErrorStatus === undefined && errorStatus !== undefined) {
@@ -783,11 +783,11 @@ function runConsoleTests(defaultReporter, runInParallel) {
             }
         });
     }
-    
+
     function failWithStatus(status) {
         fail("Process exited with code " + status);
     }
-    
+
     function finish(errorStatus) {
         deleteTemporaryProjectOutput();
         if (errorStatus !== undefined) {

From 52138e0078cb92e3026a64dab1aa40922e66ad83 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 6 Jun 2016 11:48:08 -0700
Subject: [PATCH 181/332] Make `jake runtests-browser` support test regexes
 with spaces

For example: `jake runtests-browser t="transpile .js files"` now works.
---
 Jakefile.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Jakefile.js b/Jakefile.js
index c4f56c559f3..e03e5e6f5b0 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -855,7 +855,7 @@ task("runtests-browser", ["tests", "browserify", builtLocalDirectory, servicesFi
     }
 
     tests = tests ? tests : '';
-    var cmd = host + " tests/webTestServer.js " + port + " " + browser + " " + tests;
+    var cmd = host + " tests/webTestServer.js " + port + " " + browser + " " + JSON.stringify(tests);
     console.log(cmd);
     exec(cmd);
 }, {async: true});

From f215ac94c2741c79f512896125c1f43b018052a2 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 6 Jun 2016 12:00:53 -0700
Subject: [PATCH 182/332] Add another test

---
 .../reference/ambientDeclarationsPatterns.errors.txt   | 10 +++++++---
 .../baselines/reference/ambientDeclarationsPatterns.js | 10 +++++++---
 .../conformance/ambient/ambientDeclarationsPatterns.ts |  8 ++++++--
 3 files changed, 20 insertions(+), 8 deletions(-)

diff --git a/tests/baselines/reference/ambientDeclarationsPatterns.errors.txt b/tests/baselines/reference/ambientDeclarationsPatterns.errors.txt
index c197fe54f8d..8fc7e4a3d18 100644
--- a/tests/baselines/reference/ambientDeclarationsPatterns.errors.txt
+++ b/tests/baselines/reference/ambientDeclarationsPatterns.errors.txt
@@ -1,10 +1,10 @@
-tests/cases/conformance/ambient/declarations.d.ts(6,16): error TS5061: Pattern 'too*many*asterisks' can have at most one '*' character
+tests/cases/conformance/ambient/declarations.d.ts(10,16): error TS5061: Pattern 'too*many*asterisks' can have at most one '*' character
 
 
 ==== tests/cases/conformance/ambient/user.ts (0 errors) ====
     ///<reference path="declarations.d.ts" />
-    import {foo} from "foobarbaz";
-    foo(0);
+    import {foo, baz} from "foobarbaz";
+    foo(baz);
     
     import {foos} from "foosball";
     
@@ -12,6 +12,10 @@ tests/cases/conformance/ambient/declarations.d.ts(6,16): error TS5061: Pattern '
     declare module "foo*baz" {
         export function foo(n: number): void;
     }
+    // Augmentations still work
+    declare module "foo*baz" {
+        export const baz: number;
+    }
     
     // Should be an error
     declare module "too*many*asterisks" { }
diff --git a/tests/baselines/reference/ambientDeclarationsPatterns.js b/tests/baselines/reference/ambientDeclarationsPatterns.js
index 056416f1086..ee9833a3a37 100644
--- a/tests/baselines/reference/ambientDeclarationsPatterns.js
+++ b/tests/baselines/reference/ambientDeclarationsPatterns.js
@@ -4,6 +4,10 @@
 declare module "foo*baz" {
     export function foo(n: number): void;
 }
+// Augmentations still work
+declare module "foo*baz" {
+    export const baz: number;
+}
 
 // Should be an error
 declare module "too*many*asterisks" { }
@@ -15,8 +19,8 @@ declare module "foos*" {
 
 //// [user.ts]
 ///<reference path="declarations.d.ts" />
-import {foo} from "foobarbaz";
-foo(0);
+import {foo, baz} from "foobarbaz";
+foo(baz);
 
 import {foos} from "foosball";
 
@@ -25,4 +29,4 @@ import {foos} from "foosball";
 "use strict";
 ///<reference path="declarations.d.ts" />
 var foobarbaz_1 = require("foobarbaz");
-foobarbaz_1.foo(0);
+foobarbaz_1.foo(foobarbaz_1.baz);
diff --git a/tests/cases/conformance/ambient/ambientDeclarationsPatterns.ts b/tests/cases/conformance/ambient/ambientDeclarationsPatterns.ts
index 0d3b2e1c60e..43e373ba9de 100644
--- a/tests/cases/conformance/ambient/ambientDeclarationsPatterns.ts
+++ b/tests/cases/conformance/ambient/ambientDeclarationsPatterns.ts
@@ -2,6 +2,10 @@
 declare module "foo*baz" {
     export function foo(n: number): void;
 }
+// Augmentations still work
+declare module "foo*baz" {
+    export const baz: number;
+}
 
 // Should be an error
 declare module "too*many*asterisks" { }
@@ -13,7 +17,7 @@ declare module "foos*" {
 
 // @Filename: user.ts
 ///<reference path="declarations.d.ts" />
-import {foo} from "foobarbaz";
-foo(0);
+import {foo, baz} from "foobarbaz";
+foo(baz);
 
 import {foos} from "foosball";

From a918730df0919357fbe8accd88a873991ef11fa6 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 6 Jun 2016 12:17:11 -0700
Subject: [PATCH 183/332] factor out isJsxOrTsxExtension

---
 src/compiler/core.ts    | 4 ++++
 src/compiler/program.ts | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index ba81ee7d103..8a2040a83df 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -861,6 +861,10 @@ namespace ts {
         return fileExtensionIs(path, extension) ? path.substring(0, path.length - extension.length) : undefined;
     }
 
+    export function isJsxOrTsxExtension(ext: string): boolean {
+        return ext === ".jsx" || ext === ".tsx";
+    }
+
     export interface ObjectAllocator {
         getNodeConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Node;
         getSourceFileConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => SourceFile;
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 0c060807b1f..5440b1a782b 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -646,7 +646,7 @@ namespace ts {
         return forEach(extensions, tryLoad);
 
         function tryLoad(ext: string): string {
-            if (state.skipTsx && (ext === ".jsx" || ext === ".tsx")) {
+            if (state.skipTsx && isJsxOrTsxExtension(ext)) {
                 return undefined;
             }
             const fileName = fileExtensionIs(candidate, ext) ? candidate : candidate + ext;

From 704f9874e058da4bad7bcb003710002c410570fd Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 6 Jun 2016 12:28:36 -0700
Subject: [PATCH 184/332] Move to a conformance test

---
 .../{moduleResolution.js => moduleResolutionWithExtensions.js}  | 2 +-
 ...esolution.symbols => moduleResolutionWithExtensions.symbols} | 0
 ...ion.trace.json => moduleResolutionWithExtensions.trace.json} | 0
 ...uleResolution.types => moduleResolutionWithExtensions.types} | 0
 .../externalModules/moduleResolutionWithExtensions.ts}          | 0
 5 files changed, 1 insertion(+), 1 deletion(-)
 rename tests/baselines/reference/{moduleResolution.js => moduleResolutionWithExtensions.js} (87%)
 rename tests/baselines/reference/{moduleResolution.symbols => moduleResolutionWithExtensions.symbols} (100%)
 rename tests/baselines/reference/{moduleResolution.trace.json => moduleResolutionWithExtensions.trace.json} (100%)
 rename tests/baselines/reference/{moduleResolution.types => moduleResolutionWithExtensions.types} (100%)
 rename tests/cases/{compiler/moduleResolution.ts => conformance/externalModules/moduleResolutionWithExtensions.ts} (100%)

diff --git a/tests/baselines/reference/moduleResolution.js b/tests/baselines/reference/moduleResolutionWithExtensions.js
similarity index 87%
rename from tests/baselines/reference/moduleResolution.js
rename to tests/baselines/reference/moduleResolutionWithExtensions.js
index 101089b6355..df12a3531bc 100644
--- a/tests/baselines/reference/moduleResolution.js
+++ b/tests/baselines/reference/moduleResolutionWithExtensions.js
@@ -1,4 +1,4 @@
-//// [tests/cases/compiler/moduleResolution.ts] ////
+//// [tests/cases/conformance/externalModules/moduleResolutionWithExtensions.ts] ////
 
 //// [a.ts]
 
diff --git a/tests/baselines/reference/moduleResolution.symbols b/tests/baselines/reference/moduleResolutionWithExtensions.symbols
similarity index 100%
rename from tests/baselines/reference/moduleResolution.symbols
rename to tests/baselines/reference/moduleResolutionWithExtensions.symbols
diff --git a/tests/baselines/reference/moduleResolution.trace.json b/tests/baselines/reference/moduleResolutionWithExtensions.trace.json
similarity index 100%
rename from tests/baselines/reference/moduleResolution.trace.json
rename to tests/baselines/reference/moduleResolutionWithExtensions.trace.json
diff --git a/tests/baselines/reference/moduleResolution.types b/tests/baselines/reference/moduleResolutionWithExtensions.types
similarity index 100%
rename from tests/baselines/reference/moduleResolution.types
rename to tests/baselines/reference/moduleResolutionWithExtensions.types
diff --git a/tests/cases/compiler/moduleResolution.ts b/tests/cases/conformance/externalModules/moduleResolutionWithExtensions.ts
similarity index 100%
rename from tests/cases/compiler/moduleResolution.ts
rename to tests/cases/conformance/externalModules/moduleResolutionWithExtensions.ts

From 9761c3be9710a2ce16430f237183dce9ae160dbc Mon Sep 17 00:00:00 2001
From: Wesley Wigham <t-weswig@microsoft.com>
Date: Mon, 6 Jun 2016 12:52:34 -0700
Subject: [PATCH 185/332] Revert "Revert "Merge pull request #7235 from
 weswigham/narrow-all-types""

This reverts commit fc3e040c5167868ed623612e8f33fb3beedf73b1.
---
 src/compiler/checker.ts                       |  2 +-
 src/compiler/types.ts                         |  8 +-
 .../typeGuardNarrowsPrimitiveIntersection.js  | 38 ++++++++++
 ...eGuardNarrowsPrimitiveIntersection.symbols | 70 +++++++++++++++++
 ...ypeGuardNarrowsPrimitiveIntersection.types | 76 +++++++++++++++++++
 .../typeGuardNarrowsToLiteralType.js          | 21 +++++
 .../typeGuardNarrowsToLiteralType.symbols     | 32 ++++++++
 .../typeGuardNarrowsToLiteralType.types       | 35 +++++++++
 .../typeGuardNarrowsToLiteralTypeUnion.js     | 21 +++++
 ...typeGuardNarrowsToLiteralTypeUnion.symbols | 32 ++++++++
 .../typeGuardNarrowsToLiteralTypeUnion.types  | 35 +++++++++
 .../typeGuardNarrowsPrimitiveIntersection.ts  | 21 +++++
 .../typeGuardNarrowsToLiteralType.ts          | 10 +++
 .../typeGuardNarrowsToLiteralTypeUnion.ts     | 10 +++
 14 files changed, 409 insertions(+), 2 deletions(-)
 create mode 100644 tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.js
 create mode 100644 tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.symbols
 create mode 100644 tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.types
 create mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralType.js
 create mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralType.symbols
 create mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralType.types
 create mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.js
 create mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.symbols
 create mode 100644 tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.types
 create mode 100644 tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts
 create mode 100644 tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts
 create mode 100644 tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 01945252e55..ae00387fec5 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7664,7 +7664,7 @@ namespace ts {
 
         function getFlowTypeOfReference(reference: Node, declaredType: Type, assumeInitialized: boolean, includeOuterFunctions: boolean) {
             let key: string;
-            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & TypeFlags.Narrowable)) {
+            if (!reference.flowNode || assumeInitialized && (declaredType.flags & TypeFlags.NotNarrowable)) {
                 return declaredType;
             }
             const initialType = assumeInitialized ? declaredType : addNullableKind(declaredType, TypeFlags.Undefined);
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 4c0e7a036db..f82d7673291 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2218,7 +2218,13 @@ namespace ts {
         ObjectType = Class | Interface | Reference | Tuple | Anonymous,
         UnionOrIntersection = Union | Intersection,
         StructuredType = ObjectType | Union | Intersection,
-        Narrowable = Any | ObjectType | Union | TypeParameter,
+
+        // 'NotNarrowable' types are types where narrowing reverts to the original type, rather than actually narrow.
+        // This is never really correct - you can _always_ narrow to an intersection with that type, _but_ we keep
+        // Void as the only non-narrowable type, since it's a non-value type construct (representing a lack of a value)
+        // and, generally speaking, narrowing `void` should fail in some way, as it is nonsensical. (`void` narrowing
+        // to `void & T`, in a structural sense, is just narrowing to T, which we wouldn't allow under normal rules)
+        NotNarrowable = Void,
         /* @internal */
         RequiresWidening = ContainsWideningType | ContainsObjectLiteral,
         /* @internal */
diff --git a/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.js b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.js
new file mode 100644
index 00000000000..a4cba6f4ab5
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.js
@@ -0,0 +1,38 @@
+//// [typeGuardNarrowsPrimitiveIntersection.ts]
+type Tag = {__tag: any};
+declare function isNonBlank(value: string) : value is (string & Tag);
+declare function doThis(value: string & Tag): void;
+declare function doThat(value: string) : void;
+let value: string;
+if (isNonBlank(value)) {
+    doThis(value);
+} else {
+    doThat(value);
+}
+
+
+const enum Tag2 {}
+declare function isNonBlank2(value: string) : value is (string & Tag2);
+declare function doThis2(value: string & Tag2): void;
+declare function doThat2(value: string) : void;
+if (isNonBlank2(value)) {
+    doThis2(value);
+} else {
+    doThat2(value);
+}
+
+
+//// [typeGuardNarrowsPrimitiveIntersection.js]
+var value;
+if (isNonBlank(value)) {
+    doThis(value);
+}
+else {
+    doThat(value);
+}
+if (isNonBlank2(value)) {
+    doThis2(value);
+}
+else {
+    doThat2(value);
+}
diff --git a/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.symbols b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.symbols
new file mode 100644
index 00000000000..da507fb94c5
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.symbols
@@ -0,0 +1,70 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts ===
+type Tag = {__tag: any};
+>Tag : Symbol(Tag, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 0))
+>__tag : Symbol(__tag, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 12))
+
+declare function isNonBlank(value: string) : value is (string & Tag);
+>isNonBlank : Symbol(isNonBlank, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 24))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 1, 28))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 1, 28))
+>Tag : Symbol(Tag, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 0))
+
+declare function doThis(value: string & Tag): void;
+>doThis : Symbol(doThis, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 1, 69))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 2, 24))
+>Tag : Symbol(Tag, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 0))
+
+declare function doThat(value: string) : void;
+>doThat : Symbol(doThat, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 2, 51))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 3, 24))
+
+let value: string;
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+
+if (isNonBlank(value)) {
+>isNonBlank : Symbol(isNonBlank, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 0, 24))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+
+    doThis(value);
+>doThis : Symbol(doThis, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 1, 69))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+
+} else {
+    doThat(value);
+>doThat : Symbol(doThat, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 2, 51))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+}
+
+
+const enum Tag2 {}
+>Tag2 : Symbol(Tag2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 9, 1))
+
+declare function isNonBlank2(value: string) : value is (string & Tag2);
+>isNonBlank2 : Symbol(isNonBlank2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 12, 18))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 13, 29))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 13, 29))
+>Tag2 : Symbol(Tag2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 9, 1))
+
+declare function doThis2(value: string & Tag2): void;
+>doThis2 : Symbol(doThis2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 13, 71))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 14, 25))
+>Tag2 : Symbol(Tag2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 9, 1))
+
+declare function doThat2(value: string) : void;
+>doThat2 : Symbol(doThat2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 14, 53))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 15, 25))
+
+if (isNonBlank2(value)) {
+>isNonBlank2 : Symbol(isNonBlank2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 12, 18))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+
+    doThis2(value);
+>doThis2 : Symbol(doThis2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 13, 71))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+
+} else {
+    doThat2(value);
+>doThat2 : Symbol(doThat2, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 14, 53))
+>value : Symbol(value, Decl(typeGuardNarrowsPrimitiveIntersection.ts, 4, 3))
+}
+
diff --git a/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.types b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.types
new file mode 100644
index 00000000000..478363669b4
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsPrimitiveIntersection.types
@@ -0,0 +1,76 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts ===
+type Tag = {__tag: any};
+>Tag : { __tag: any; }
+>__tag : any
+
+declare function isNonBlank(value: string) : value is (string & Tag);
+>isNonBlank : (value: string) => value is string & { __tag: any; }
+>value : string
+>value : any
+>Tag : { __tag: any; }
+
+declare function doThis(value: string & Tag): void;
+>doThis : (value: string & { __tag: any; }) => void
+>value : string & { __tag: any; }
+>Tag : { __tag: any; }
+
+declare function doThat(value: string) : void;
+>doThat : (value: string) => void
+>value : string
+
+let value: string;
+>value : string
+
+if (isNonBlank(value)) {
+>isNonBlank(value) : boolean
+>isNonBlank : (value: string) => value is string & { __tag: any; }
+>value : string
+
+    doThis(value);
+>doThis(value) : void
+>doThis : (value: string & { __tag: any; }) => void
+>value : string & { __tag: any; }
+
+} else {
+    doThat(value);
+>doThat(value) : void
+>doThat : (value: string) => void
+>value : string
+}
+
+
+const enum Tag2 {}
+>Tag2 : Tag2
+
+declare function isNonBlank2(value: string) : value is (string & Tag2);
+>isNonBlank2 : (value: string) => value is string & Tag2
+>value : string
+>value : any
+>Tag2 : Tag2
+
+declare function doThis2(value: string & Tag2): void;
+>doThis2 : (value: string & Tag2) => void
+>value : string & Tag2
+>Tag2 : Tag2
+
+declare function doThat2(value: string) : void;
+>doThat2 : (value: string) => void
+>value : string
+
+if (isNonBlank2(value)) {
+>isNonBlank2(value) : boolean
+>isNonBlank2 : (value: string) => value is string & Tag2
+>value : string
+
+    doThis2(value);
+>doThis2(value) : void
+>doThis2 : (value: string & Tag2) => void
+>value : string & Tag2
+
+} else {
+    doThat2(value);
+>doThat2(value) : void
+>doThat2 : (value: string) => void
+>value : string
+}
+
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralType.js b/tests/baselines/reference/typeGuardNarrowsToLiteralType.js
new file mode 100644
index 00000000000..fdd2ee3fb7f
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsToLiteralType.js
@@ -0,0 +1,21 @@
+//// [typeGuardNarrowsToLiteralType.ts]
+declare function isFoo(value: string) : value is "foo";
+declare function doThis(value: "foo"): void;
+declare function doThat(value: string) : void;
+let value: string;
+if (isFoo(value)) {
+    doThis(value);
+} else {
+    doThat(value);
+}
+
+
+
+//// [typeGuardNarrowsToLiteralType.js]
+var value;
+if (isFoo(value)) {
+    doThis(value);
+}
+else {
+    doThat(value);
+}
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralType.symbols b/tests/baselines/reference/typeGuardNarrowsToLiteralType.symbols
new file mode 100644
index 00000000000..0d0ddc5f00d
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsToLiteralType.symbols
@@ -0,0 +1,32 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts ===
+declare function isFoo(value: string) : value is "foo";
+>isFoo : Symbol(isFoo, Decl(typeGuardNarrowsToLiteralType.ts, 0, 0))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 0, 23))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 0, 23))
+
+declare function doThis(value: "foo"): void;
+>doThis : Symbol(doThis, Decl(typeGuardNarrowsToLiteralType.ts, 0, 55))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 1, 24))
+
+declare function doThat(value: string) : void;
+>doThat : Symbol(doThat, Decl(typeGuardNarrowsToLiteralType.ts, 1, 44))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 2, 24))
+
+let value: string;
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 3, 3))
+
+if (isFoo(value)) {
+>isFoo : Symbol(isFoo, Decl(typeGuardNarrowsToLiteralType.ts, 0, 0))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 3, 3))
+
+    doThis(value);
+>doThis : Symbol(doThis, Decl(typeGuardNarrowsToLiteralType.ts, 0, 55))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 3, 3))
+
+} else {
+    doThat(value);
+>doThat : Symbol(doThat, Decl(typeGuardNarrowsToLiteralType.ts, 1, 44))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralType.ts, 3, 3))
+}
+
+
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralType.types b/tests/baselines/reference/typeGuardNarrowsToLiteralType.types
new file mode 100644
index 00000000000..9835206deb9
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsToLiteralType.types
@@ -0,0 +1,35 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts ===
+declare function isFoo(value: string) : value is "foo";
+>isFoo : (value: string) => value is "foo"
+>value : string
+>value : any
+
+declare function doThis(value: "foo"): void;
+>doThis : (value: "foo") => void
+>value : "foo"
+
+declare function doThat(value: string) : void;
+>doThat : (value: string) => void
+>value : string
+
+let value: string;
+>value : string
+
+if (isFoo(value)) {
+>isFoo(value) : boolean
+>isFoo : (value: string) => value is "foo"
+>value : string
+
+    doThis(value);
+>doThis(value) : void
+>doThis : (value: "foo") => void
+>value : "foo"
+
+} else {
+    doThat(value);
+>doThat(value) : void
+>doThat : (value: string) => void
+>value : string
+}
+
+
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.js b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.js
new file mode 100644
index 00000000000..715b362c8e0
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.js
@@ -0,0 +1,21 @@
+//// [typeGuardNarrowsToLiteralTypeUnion.ts]
+declare function isFoo(value: string) : value is ("foo" | "bar");
+declare function doThis(value: "foo" | "bar"): void;
+declare function doThat(value: string) : void;
+let value: string;
+if (isFoo(value)) {
+    doThis(value);
+} else {
+    doThat(value);
+}
+
+
+
+//// [typeGuardNarrowsToLiteralTypeUnion.js]
+var value;
+if (isFoo(value)) {
+    doThis(value);
+}
+else {
+    doThat(value);
+}
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.symbols b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.symbols
new file mode 100644
index 00000000000..356fa06a06c
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.symbols
@@ -0,0 +1,32 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts ===
+declare function isFoo(value: string) : value is ("foo" | "bar");
+>isFoo : Symbol(isFoo, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 0))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 23))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 23))
+
+declare function doThis(value: "foo" | "bar"): void;
+>doThis : Symbol(doThis, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 65))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 1, 24))
+
+declare function doThat(value: string) : void;
+>doThat : Symbol(doThat, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 1, 52))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 2, 24))
+
+let value: string;
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 3, 3))
+
+if (isFoo(value)) {
+>isFoo : Symbol(isFoo, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 0))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 3, 3))
+
+    doThis(value);
+>doThis : Symbol(doThis, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 0, 65))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 3, 3))
+
+} else {
+    doThat(value);
+>doThat : Symbol(doThat, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 1, 52))
+>value : Symbol(value, Decl(typeGuardNarrowsToLiteralTypeUnion.ts, 3, 3))
+}
+
+
diff --git a/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.types b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.types
new file mode 100644
index 00000000000..321a8861d55
--- /dev/null
+++ b/tests/baselines/reference/typeGuardNarrowsToLiteralTypeUnion.types
@@ -0,0 +1,35 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts ===
+declare function isFoo(value: string) : value is ("foo" | "bar");
+>isFoo : (value: string) => value is "foo" | "bar"
+>value : string
+>value : any
+
+declare function doThis(value: "foo" | "bar"): void;
+>doThis : (value: "foo" | "bar") => void
+>value : "foo" | "bar"
+
+declare function doThat(value: string) : void;
+>doThat : (value: string) => void
+>value : string
+
+let value: string;
+>value : string
+
+if (isFoo(value)) {
+>isFoo(value) : boolean
+>isFoo : (value: string) => value is "foo" | "bar"
+>value : string
+
+    doThis(value);
+>doThis(value) : void
+>doThis : (value: "foo" | "bar") => void
+>value : "foo" | "bar"
+
+} else {
+    doThat(value);
+>doThat(value) : void
+>doThat : (value: string) => void
+>value : string
+}
+
+
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts
new file mode 100644
index 00000000000..376a78275c8
--- /dev/null
+++ b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsPrimitiveIntersection.ts
@@ -0,0 +1,21 @@
+type Tag = {__tag: any};
+declare function isNonBlank(value: string) : value is (string & Tag);
+declare function doThis(value: string & Tag): void;
+declare function doThat(value: string) : void;
+let value: string;
+if (isNonBlank(value)) {
+    doThis(value);
+} else {
+    doThat(value);
+}
+
+
+const enum Tag2 {}
+declare function isNonBlank2(value: string) : value is (string & Tag2);
+declare function doThis2(value: string & Tag2): void;
+declare function doThat2(value: string) : void;
+if (isNonBlank2(value)) {
+    doThis2(value);
+} else {
+    doThat2(value);
+}
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts
new file mode 100644
index 00000000000..3b7d5bba21a
--- /dev/null
+++ b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralType.ts
@@ -0,0 +1,10 @@
+declare function isFoo(value: string) : value is "foo";
+declare function doThis(value: "foo"): void;
+declare function doThat(value: string) : void;
+let value: string;
+if (isFoo(value)) {
+    doThis(value);
+} else {
+    doThat(value);
+}
+
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts
new file mode 100644
index 00000000000..8f4726160f4
--- /dev/null
+++ b/tests/cases/conformance/expressions/typeGuards/typeGuardNarrowsToLiteralTypeUnion.ts
@@ -0,0 +1,10 @@
+declare function isFoo(value: string) : value is ("foo" | "bar");
+declare function doThis(value: "foo" | "bar"): void;
+declare function doThat(value: string) : void;
+let value: string;
+if (isFoo(value)) {
+    doThis(value);
+} else {
+    doThat(value);
+}
+

From 26b1ab499c21713fd360a42e52bf9e9f171df4cc Mon Sep 17 00:00:00 2001
From: Wesley Wigham <t-weswig@microsoft.com>
Date: Mon, 6 Jun 2016 13:05:29 -0700
Subject: [PATCH 186/332] Use inclusive flag, as originally done, but include
 almost everything

---
 src/compiler/checker.ts | 2 +-
 src/compiler/types.ts   | 9 +++------
 2 files changed, 4 insertions(+), 7 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index ae00387fec5..01945252e55 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7664,7 +7664,7 @@ namespace ts {
 
         function getFlowTypeOfReference(reference: Node, declaredType: Type, assumeInitialized: boolean, includeOuterFunctions: boolean) {
             let key: string;
-            if (!reference.flowNode || assumeInitialized && (declaredType.flags & TypeFlags.NotNarrowable)) {
+            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & TypeFlags.Narrowable)) {
                 return declaredType;
             }
             const initialType = assumeInitialized ? declaredType : addNullableKind(declaredType, TypeFlags.Undefined);
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index f82d7673291..a86b1ed708d 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2219,12 +2219,9 @@ namespace ts {
         UnionOrIntersection = Union | Intersection,
         StructuredType = ObjectType | Union | Intersection,
 
-        // 'NotNarrowable' types are types where narrowing reverts to the original type, rather than actually narrow.
-        // This is never really correct - you can _always_ narrow to an intersection with that type, _but_ we keep
-        // Void as the only non-narrowable type, since it's a non-value type construct (representing a lack of a value)
-        // and, generally speaking, narrowing `void` should fail in some way, as it is nonsensical. (`void` narrowing
-        // to `void & T`, in a structural sense, is just narrowing to T, which we wouldn't allow under normal rules)
-        NotNarrowable = Void,
+        // 'Narrowable' types are types where narrowing actually narrows.
+        // This *should* be every type other than null, undefined, void, and never
+        Narrowable = Any | StructuredType | TypeParameter | StringLike | NumberLike | Boolean | ESSymbol,
         /* @internal */
         RequiresWidening = ContainsWideningType | ContainsObjectLiteral,
         /* @internal */

From 693cb9c6ca6ad7adf5b05a91a213595c03ad7ff3 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 6 Jun 2016 13:20:32 -0700
Subject: [PATCH 187/332] Add additional tests

---
 ...nFunctionParametersAndArguments.errors.txt | 35 +++++++++++++++++++
 ...gCommasInFunctionParametersAndArguments.js | 15 ++++++++
 ...gCommasInFunctionParametersAndArguments.ts |  8 +++++
 3 files changed, 58 insertions(+)
 create mode 100644 tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.errors.txt

diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.errors.txt b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.errors.txt
new file mode 100644
index 00000000000..02e44fa0976
--- /dev/null
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.errors.txt
@@ -0,0 +1,35 @@
+tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts(20,11): error TS1138: Parameter declaration expected.
+
+
+==== tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts (1 errors) ====
+    function f1(x,) {}
+    
+    f1(1,);
+    
+    function f2(...args,) {}
+    
+    f2(...[],);
+    
+    // Not confused by overloads
+    declare function f3(x, ): number;
+    declare function f3(x, y,): string;
+    
+    <number>f3(1,);
+    <string>f3(1, 2,);
+    
+    // Works for constructors too
+    class X {
+        constructor(a,) { }
+        // *Not* allowed in getter
+        get x(,) { return 0; }
+              ~
+!!! error TS1138: Parameter declaration expected.
+        set x(value,) { }
+    }
+    interface Y {
+        new(x,);
+        (x,);
+    }
+    
+    new X(1,);
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
index 87c925fb22b..70e3e1ccf42 100644
--- a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
@@ -17,7 +17,15 @@ declare function f3(x, y,): string;
 // Works for constructors too
 class X {
     constructor(a,) { }
+    // *Not* allowed in getter
+    get x(,) { return 0; }
+    set x(value,) { }
 }
+interface Y {
+    new(x,);
+    (x,);
+}
+
 new X(1,);
 
 
@@ -37,6 +45,13 @@ f3(1, 2);
 var X = (function () {
     function X(a) {
     }
+    Object.defineProperty(X.prototype, "x", {
+        // *Not* allowed in getter
+        get: function () { return 0; },
+        set: function (value) { },
+        enumerable: true,
+        configurable: true
+    });
     return X;
 }());
 new X(1);
diff --git a/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts b/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
index 9c21d7f24ea..5f48920e4dd 100644
--- a/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
+++ b/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
@@ -16,5 +16,13 @@ declare function f3(x, y,): string;
 // Works for constructors too
 class X {
     constructor(a,) { }
+    // *Not* allowed in getter
+    get x(,) { return 0; }
+    set x(value,) { }
 }
+interface Y {
+    new(x,);
+    (x,);
+}
+
 new X(1,);

From 1fe8a0808503db4f20c65b9d4f99bbe6ae9f582a Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 6 Jun 2016 13:31:37 -0700
Subject: [PATCH 188/332] Respond to PR comments

---
 src/services/services.ts           | 10 +++++-----
 tests/cases/unittests/transpile.ts | 19 ++++++++++++-------
 2 files changed, 17 insertions(+), 12 deletions(-)

diff --git a/src/services/services.ts b/src/services/services.ts
index 2664c430912..c64610c7509 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1920,11 +1920,15 @@ namespace ts {
         sourceMapText?: string;
     }
 
+    const commandLineOptions_stringToEnum = <CommandLineOptionOfCustomType[]>filter(optionDeclarations, o => {
+        return typeof o.type === "object" && !forEachValue(<Map<any>> o.type, v => typeof v !== "number");
+    });
+
     /** JS users may pass in string values for enum compiler options (such as ModuleKind), so convert. */
     function fixupCompilerOptions(options: CompilerOptions, diagnostics: Diagnostic[]) {
         options = clone(options);
 
-        for (const opt of stringValuedEnums) {
+        for (const opt of commandLineOptions_stringToEnum) {
             if (!hasProperty(options, opt.name)) {
                 continue;
             }
@@ -1946,10 +1950,6 @@ namespace ts {
         return options;
     }
 
-    const stringValuedEnums = <CommandLineOptionOfCustomType[]>filter(optionDeclarations, o => {
-        return typeof o.type === "object" && !forEachValue(<Map<any>> o.type, v => typeof v !== "number");
-    });
-
     /*
      * This function will compile source text from 'input' argument using specified compiler options.
      * If not options are provided - it will use a set of default compiler options.
diff --git a/tests/cases/unittests/transpile.ts b/tests/cases/unittests/transpile.ts
index ca2c5939f35..e694f943e1a 100644
--- a/tests/cases/unittests/transpile.ts
+++ b/tests/cases/unittests/transpile.ts
@@ -7,13 +7,17 @@ namespace ts {
             options?: TranspileOptions;
             expectedOutput?: string;
             expectedDiagnosticCodes?: number[];
+            expectedDiagnosticTexts?: string[];
         }
 
-        function checkDiagnostics(diagnostics: Diagnostic[], expectedDiagnosticCodes: number[] = []) {
-            for (let i = 0; i < expectedDiagnosticCodes.length; i++) {
-                assert.equal(expectedDiagnosticCodes[i], diagnostics[i] && diagnostics[i].code, `Could not find expeced diagnostic.`);
+        function checkDiagnostics(diagnostics: Diagnostic[], expectedDiagnosticCodes: number[] = [], expectedDiagnosticTexts: string[] = []) {
+            const n = expectedDiagnosticCodes.length;
+            assert.equal(n, expectedDiagnosticTexts.length);
+            for (let i = 0; i < n; i++) {
+                assert.equal(expectedDiagnosticCodes[i], diagnostics[i] && diagnostics[i].code, `Could not find expected diagnostic.`);
+                assert.equal(expectedDiagnosticTexts[i], diagnostics[i] && diagnostics[i].messageText);
             }
-            assert.equal(diagnostics.length, expectedDiagnosticCodes.length, "Resuting diagnostics count does not match expected");
+            assert.equal(diagnostics.length, n, "Resuting diagnostics count does not match expected");
         }
 
         function test(input: string, testSettings: TranspileTestSettings): void {
@@ -32,7 +36,7 @@ namespace ts {
             transpileOptions.reportDiagnostics = true;
             const transpileModuleResult = transpileModule(input, transpileOptions);
 
-            checkDiagnostics(transpileModuleResult.diagnostics, testSettings.expectedDiagnosticCodes);
+            checkDiagnostics(transpileModuleResult.diagnostics, testSettings.expectedDiagnosticCodes, testSettings.expectedDiagnosticTexts);
 
             if (testSettings.expectedOutput !== undefined) {
                 assert.equal(transpileModuleResult.outputText, testSettings.expectedOutput);
@@ -41,7 +45,7 @@ namespace ts {
             if (canUseOldTranspile) {
                 const diagnostics: Diagnostic[] = [];
                 const transpileResult = transpile(input, transpileOptions.compilerOptions, transpileOptions.fileName, diagnostics, transpileOptions.moduleName);
-                checkDiagnostics(diagnostics, testSettings.expectedDiagnosticCodes);
+                checkDiagnostics(diagnostics, testSettings.expectedDiagnosticCodes, testSettings.expectedDiagnosticTexts);
                 if (testSettings.expectedOutput) {
                     assert.equal(transpileResult, testSettings.expectedOutput);
                 }
@@ -313,7 +317,8 @@ var x = 0;`,
             it("Fails on bad value", () => {
                 test(``, {
                     options: { compilerOptions: { module: <ModuleKind><any>{} } },
-                    expectedDiagnosticCodes: [6046]
+                    expectedDiagnosticCodes: [6046],
+                    expectedDiagnosticTexts: ["Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'"]
                 });
             });
         });

From 941c863524637c2d50f4df15c2758c5e74317b01 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 6 Jun 2016 13:40:24 -0700
Subject: [PATCH 189/332] Fix typo

---
 src/harness/compilerRunner.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/harness/compilerRunner.ts b/src/harness/compilerRunner.ts
index e822b31584e..1834b0b3bbc 100644
--- a/src/harness/compilerRunner.ts
+++ b/src/harness/compilerRunner.ts
@@ -154,7 +154,7 @@ class CompilerBaselineRunner extends RunnerBase {
 
             it (`Correct module resolution tracing for ${fileName}`, () => {
                 if (options.traceResolution) {
-                    Harness.Baseline.runBaseline("Correct sourcemap content for " + fileName, justName.replace(/\.tsx?$/, ".trace.json"), () => {
+                    Harness.Baseline.runBaseline("Correct module resolution tracing for " + fileName, justName.replace(/\.tsx?$/, ".trace.json"), () => {
                         return JSON.stringify(result.traceResults || [], undefined, 4);
                     });
                 }

From 3052913b92e145b985e9c9a83b01e74df6dd9547 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Tue, 7 Jun 2016 02:14:56 -0700
Subject: [PATCH 190/332] add tests for tsserver project system

---
 src/compiler/sys.ts                           |   2 +-
 .../cases/unittests/tsserverProjectSystem.ts  | 197 ++++++++++++++++--
 2 files changed, 179 insertions(+), 20 deletions(-)

diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 0c500d5500e..bcf71b4016a 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -2,7 +2,7 @@
 
 namespace ts {
     export type FileWatcherCallback = (fileName: string, removed?: boolean) => void;
-    export type DirectoryWatcherCallback = (directoryName: string) => void;
+    export type DirectoryWatcherCallback = (fileName: string) => void;
     export interface WatchedFile {
         fileName: string;
         callback: FileWatcherCallback;
diff --git a/tests/cases/unittests/tsserverProjectSystem.ts b/tests/cases/unittests/tsserverProjectSystem.ts
index c69821ced5f..e5b140237e5 100644
--- a/tests/cases/unittests/tsserverProjectSystem.ts
+++ b/tests/cases/unittests/tsserverProjectSystem.ts
@@ -107,6 +107,30 @@ namespace ts {
         }
     }
 
+    function checkConfiguredProjectNumber(projectService: server.ProjectService, expected: number) {
+        assert.equal(projectService.configuredProjects.length, expected, `expected ${expected} configured project(s)`);
+    }
+
+    function checkInferredProjectNumber(projectService: server.ProjectService, expected: number) {
+        assert.equal(projectService.inferredProjects.length, expected, `expected ${expected} inferred project(s)`);
+    }
+
+    function checkWatchedFiles(host: TestServerHost, expectedFiles: string[]) {
+        checkMapKeys("watchedFiles", host.watchedFiles, expectedFiles);
+    }
+
+    function checkWatchedDirectories(host: TestServerHost, expectedDirectories: string[]) {
+        checkMapKeys("watchedDirectories", host.watchedDirectories, expectedDirectories);
+    }
+
+    function checkConfiguredProjectActualFiles(project: server.Project, expectedFiles: string[]) {
+        checkFileNames("configuredProjects project, actualFileNames", project.getFileNames(), expectedFiles);
+    }
+
+    function checkConfiguredProjectRootFiles(project: server.Project, expectedFiles: string[]) {
+        checkFileNames("configuredProjects project, rootFileNames", project.getRootFiles(), expectedFiles);
+    }
+
     class TestServerHost implements server.ServerHost {
         args: string[] = [];
         newLine: "\n";
@@ -188,6 +212,26 @@ namespace ts {
             };
         }
 
+        triggerDirectoryWatcherCallback(directoryName: string, fileName: string): void {
+            const path = this.toPath(directoryName);
+            const callbacks = lookUp(this.watchedDirectories, path);
+            if (callbacks) {
+                for (const callback of callbacks) {
+                    callback.cb(fileName);
+                }
+            }
+        }
+
+        triggerFileWatcherCallback(fileName: string): void {
+            const path = this.toPath(fileName);
+            const callbacks = lookUp(this.watchedFiles, path);
+            if (callbacks) {
+                for (const callback of callbacks) {
+                    callback(path, /*removed*/ true);
+                }
+            }
+        }
+
         watchFile(fileName: string, callback: FileWatcherCallback) {
             const path = this.toPath(fileName);
             const callbacks = lookUp(this.watchedFiles, path) || (this.watchedFiles[path] = []);
@@ -204,7 +248,7 @@ namespace ts {
         }
 
         // TOOD: record and invoke callbacks to simulate timer events
-        readonly setTimeout = (callback: (...args: any[]) => void, ms: number, ...args: any[]): any => void 0;
+        readonly setTimeout = setTimeout;
         readonly clearTimeout = (timeoutId: any): void => void 0;
         readonly readFile = (s: string) => (<File>this.fs.get(this.toPath(s))).content;
         readonly resolvePath = (s: string) => s;
@@ -216,7 +260,20 @@ namespace ts {
         readonly exit = () => notImplemented();
     }
 
-    describe("tsserver project system:", () => {
+    describe("tsserver-project-system", () => {
+        const commonFile1: FileOrFolder = {
+            path: "/a/b/commonFile1.ts",
+            content: "let x = 1"
+        };
+        const commonFile2: FileOrFolder = {
+            path: "/a/b/commonFile2.ts",
+            content: "let y = 1"
+        };
+        const libFile: FileOrFolder = {
+            path: "/a/lib/lib.d.ts",
+            content: libFileContent
+        };
+
         it("create inferred project", () => {
             const appFile: FileOrFolder = {
                 path: "/a/b/c/app.ts",
@@ -225,10 +282,7 @@ namespace ts {
                 console.log(f)
                 `
             };
-            const libFile: FileOrFolder = {
-                path: "/a/lib/lib.d.ts",
-                content: libFileContent
-            };
+
             const moduleFile: FileOrFolder = {
                 path: "/a/b/c/module.d.ts",
                 content: `export let x: number`
@@ -238,13 +292,13 @@ namespace ts {
             const { configFileName } = projectService.openClientFile(appFile.path);
 
             assert(!configFileName, `should not find config, got: '${configFileName}`);
-            assert.equal(projectService.inferredProjects.length, 1, "expected one inferred project");
-            assert.equal(projectService.configuredProjects.length, 0, "expected no configured project");
+            checkConfiguredProjectNumber(projectService, 0);
+            checkInferredProjectNumber(projectService, 1);
 
             const project = projectService.inferredProjects[0];
 
             checkFileNames("inferred project", project.getFileNames(), [appFile.path, libFile.path, moduleFile.path]);
-            checkMapKeys("watchedDirectories", host.watchedDirectories, ["/a/b/c", "/a/b", "/a"]);
+            checkWatchedDirectories(host, ["/a/b/c", "/a/b", "/a"]);
         });
 
         it("create configured project without file list", () => {
@@ -258,10 +312,6 @@ namespace ts {
                     ]
                 }`
             };
-            const libFile: FileOrFolder = {
-                path: "/a/lib/lib.d.ts",
-                content: libFileContent
-            };
             const file1: FileOrFolder = {
                 path: "/a/b/c/f1.ts",
                 content: "let x = 1"
@@ -274,21 +324,130 @@ namespace ts {
                 path: "/a/b/e/f3.ts",
                 content: "let z = 1"
             };
+
             const host = new TestServerHost(/*useCaseSensitiveFileNames*/ false, getExecutingFilePathFromLibFile(libFile), "/", [ configFile, libFile, file1, file2, file3 ]);
             const projectService = new server.ProjectService(host, nullLogger);
             const { configFileName, configFileErrors } = projectService.openClientFile(file1.path);
 
             assert(configFileName, "should find config file");
             assert.isTrue(!configFileErrors, `expect no errors in config file, got ${JSON.stringify(configFileErrors)}`);
-            assert.equal(projectService.inferredProjects.length, 0, "expected no inferred project");
-            assert.equal(projectService.configuredProjects.length, 1, "expected one configured project");
+            checkInferredProjectNumber(projectService, 0);
+            checkConfiguredProjectNumber(projectService, 1);
 
             const project = projectService.configuredProjects[0];
-            checkFileNames("configuredProjects project, actualFileNames", project.getFileNames(), [file1.path, libFile.path, file2.path]);
-            checkFileNames("configuredProjects project, rootFileNames", project.getRootFiles(), [file1.path, file2.path]);
+            checkConfiguredProjectActualFiles(project, [file1.path, libFile.path, file2.path]);
+            checkConfiguredProjectRootFiles(project, [file1.path, file2.path]);
+            // watching all files except one that was open
+            checkWatchedFiles(host, [configFile.path, file2.path, libFile.path]);
+            checkWatchedDirectories(host, [getDirectoryPath(configFile.path)]);
+        });
 
-            checkMapKeys("watchedFiles", host.watchedFiles, [configFile.path, file2.path, libFile.path]); // watching all files except one that was open
-            checkMapKeys("watchedDirectories", host.watchedDirectories, [getDirectoryPath(configFile.path)]);
+        it("add and then remove a config file in a folder with loose files", () => {
+            const configFile: FileOrFolder = {
+                path: "/a/b/tsconfig.json",
+                content: `{
+                    "files": ["commonFile1.ts"]
+                }`
+            };
+            const filesWithoutConfig = [ libFile, commonFile1, commonFile2 ];
+            const filesWithConfig = [ libFile, commonFile1, commonFile2, configFile ];
+            const host = new TestServerHost(/*useCaseSensitiveFileNames*/ false, getExecutingFilePathFromLibFile(libFile), "/", filesWithoutConfig);
+            const projectService = new server.ProjectService(host, nullLogger);
+            projectService.openClientFile(commonFile1.path);
+            projectService.openClientFile(commonFile2.path);
+
+            checkInferredProjectNumber(projectService, 2);
+            checkWatchedDirectories(host, ["/a/b", "/a"]);
+
+            // Add a tsconfig file
+            host.reloadFS(filesWithConfig);
+            host.triggerDirectoryWatcherCallback("/a/b", configFile.path);
+
+            checkInferredProjectNumber(projectService, 1);
+            checkConfiguredProjectNumber(projectService, 1);
+            // watching all files except one that was open
+            checkWatchedFiles(host, [libFile.path, configFile.path]);
+
+            // remove the tsconfig file
+            host.reloadFS(filesWithoutConfig);
+            host.triggerFileWatcherCallback(configFile.path);
+            checkInferredProjectNumber(projectService, 2);
+            checkConfiguredProjectNumber(projectService, 0);
+            checkWatchedDirectories(host, ["/a/b", "/a"]);
+        });
+
+        it("add new files to a configured project without file list", (done: () => void) => {
+            const configFile: FileOrFolder = {
+                path: "/a/b/tsconfig.json",
+                content: `{}`
+            };
+            const host = new TestServerHost(/*useCaseSensitiveFileNames*/ false, getExecutingFilePathFromLibFile(libFile), "/", [commonFile1, libFile, configFile]);
+            const projectService = new server.ProjectService(host, nullLogger);
+            projectService.openClientFile(commonFile1.path);
+            checkWatchedDirectories(host, ["/a/b"]);
+            checkConfiguredProjectNumber(projectService, 1);
+
+            const project = projectService.configuredProjects[0];
+            checkConfiguredProjectRootFiles(project, [commonFile1.path]);
+
+            // add a new ts file
+            host.reloadFS([commonFile1, commonFile2, libFile, configFile]);
+            host.triggerDirectoryWatcherCallback("/a/b", commonFile2.path);
+            // project service waits for 250ms to update the project structure, therefore the assertion needs to wait longer.
+            setTimeout(() => {
+                checkConfiguredProjectRootFiles(project, [commonFile1.path, commonFile2.path]);
+                done();
+            }, 1000);
+        });
+
+        it("should ignore non-existing files specified in the config file", () => {
+            const configFile: FileOrFolder = {
+                path: "/a/b/tsconfig.json",
+                content: `{
+                    "compilerOptions": {},
+                    "files": [
+                        "commonFile1.ts",
+                        "commonFile3.ts"
+                    ]
+                }`
+            };
+            const host = new TestServerHost(/*useCaseSensitiveFileNames*/ false, getExecutingFilePathFromLibFile(libFile), "/", [commonFile1, commonFile2, configFile]);
+            const projectService = new server.ProjectService(host, nullLogger);
+            projectService.openClientFile(commonFile1.path);
+            projectService.openClientFile(commonFile2.path);
+
+            checkConfiguredProjectNumber(projectService, 1);
+            const project = projectService.configuredProjects[0];
+            checkConfiguredProjectRootFiles(project, [commonFile1.path]);
+            checkInferredProjectNumber(projectService, 1);
+        });
+
+        it("handle recreated files correctly", (done: () => void) => {
+            const configFile: FileOrFolder = {
+                path: "/a/b/tsconfig.json",
+                content: `{}`
+            };
+            const host = new TestServerHost(/*useCaseSensitiveFileNames*/ false, getExecutingFilePathFromLibFile(libFile), "/", [commonFile1, commonFile2, configFile]);
+            const projectService = new server.ProjectService(host, nullLogger);
+            projectService.openClientFile(commonFile1.path);
+
+            checkConfiguredProjectNumber(projectService, 1);
+            const project = projectService.configuredProjects[0];
+            checkConfiguredProjectRootFiles(project, [commonFile1.path, commonFile2.path]);
+
+            // delete commonFile1
+            projectService.closeClientFile(commonFile1.path);
+            host.reloadFS([configFile]);
+            host.triggerDirectoryWatcherCallback("/a/b", commonFile1.path);
+            host.setTimeout(() => {
+                // re-add commonFile1
+                host.reloadFS([commonFile1, configFile]);
+                projectService.openClientFile(commonFile1.path);
+                host.setTimeout(() => {
+                    checkConfiguredProjectRootFiles(project, [commonFile1.path, commonFile2.path]);
+                    done();
+                }, 500);
+            }, 500);
         });
     });
 }
\ No newline at end of file

From ed48e58a387dcde1c259a6a9f0d4842c6322114c Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Tue, 7 Jun 2016 06:10:47 -0700
Subject: [PATCH 191/332] Fix test

---
 ...nFunctionParametersAndArguments.errors.txt | 35 ---------------
 ...gCommasInFunctionParametersAndArguments.js |  7 ++-
 ...asInFunctionParametersAndArguments.symbols | 44 +++++++++++++------
 ...mmasInFunctionParametersAndArguments.types | 16 +++++++
 .../trailingCommasInGetter.errors.txt         | 10 +++++
 .../reference/trailingCommasInGetter.js       | 17 +++++++
 ...gCommasInFunctionParametersAndArguments.ts |  5 ++-
 .../conformance/es7/trailingCommasInGetter.ts |  3 ++
 8 files changed, 82 insertions(+), 55 deletions(-)
 delete mode 100644 tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.errors.txt
 create mode 100644 tests/baselines/reference/trailingCommasInGetter.errors.txt
 create mode 100644 tests/baselines/reference/trailingCommasInGetter.js
 create mode 100644 tests/cases/conformance/es7/trailingCommasInGetter.ts

diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.errors.txt b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.errors.txt
deleted file mode 100644
index 02e44fa0976..00000000000
--- a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.errors.txt
+++ /dev/null
@@ -1,35 +0,0 @@
-tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts(20,11): error TS1138: Parameter declaration expected.
-
-
-==== tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts (1 errors) ====
-    function f1(x,) {}
-    
-    f1(1,);
-    
-    function f2(...args,) {}
-    
-    f2(...[],);
-    
-    // Not confused by overloads
-    declare function f3(x, ): number;
-    declare function f3(x, y,): string;
-    
-    <number>f3(1,);
-    <string>f3(1, 2,);
-    
-    // Works for constructors too
-    class X {
-        constructor(a,) { }
-        // *Not* allowed in getter
-        get x(,) { return 0; }
-              ~
-!!! error TS1138: Parameter declaration expected.
-        set x(value,) { }
-    }
-    interface Y {
-        new(x,);
-        (x,);
-    }
-    
-    new X(1,);
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
index 70e3e1ccf42..6f30140c63e 100644
--- a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.js
@@ -1,4 +1,5 @@
 //// [trailingCommasInFunctionParametersAndArguments.ts]
+
 function f1(x,) {}
 
 f1(1,);
@@ -17,8 +18,7 @@ declare function f3(x, y,): string;
 // Works for constructors too
 class X {
     constructor(a,) { }
-    // *Not* allowed in getter
-    get x(,) { return 0; }
+    // See trailingCommasInGetter.ts
     set x(value,) { }
 }
 interface Y {
@@ -46,8 +46,7 @@ var X = (function () {
     function X(a) {
     }
     Object.defineProperty(X.prototype, "x", {
-        // *Not* allowed in getter
-        get: function () { return 0; },
+        // See trailingCommasInGetter.ts
         set: function (value) { },
         enumerable: true,
         configurable: true
diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols
index b146d230bac..2ee58a747b7 100644
--- a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.symbols
@@ -1,41 +1,57 @@
 === tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts ===
+
 function f1(x,) {}
 >f1 : Symbol(f1, Decl(trailingCommasInFunctionParametersAndArguments.ts, 0, 0))
->x : Symbol(x, Decl(trailingCommasInFunctionParametersAndArguments.ts, 0, 12))
+>x : Symbol(x, Decl(trailingCommasInFunctionParametersAndArguments.ts, 1, 12))
 
 f1(1,);
 >f1 : Symbol(f1, Decl(trailingCommasInFunctionParametersAndArguments.ts, 0, 0))
 
 function f2(...args,) {}
->f2 : Symbol(f2, Decl(trailingCommasInFunctionParametersAndArguments.ts, 2, 7))
->args : Symbol(args, Decl(trailingCommasInFunctionParametersAndArguments.ts, 4, 12))
+>f2 : Symbol(f2, Decl(trailingCommasInFunctionParametersAndArguments.ts, 3, 7))
+>args : Symbol(args, Decl(trailingCommasInFunctionParametersAndArguments.ts, 5, 12))
 
 f2(...[],);
->f2 : Symbol(f2, Decl(trailingCommasInFunctionParametersAndArguments.ts, 2, 7))
+>f2 : Symbol(f2, Decl(trailingCommasInFunctionParametersAndArguments.ts, 3, 7))
 
 // Not confused by overloads
 declare function f3(x, ): number;
->f3 : Symbol(f3, Decl(trailingCommasInFunctionParametersAndArguments.ts, 6, 11), Decl(trailingCommasInFunctionParametersAndArguments.ts, 9, 33))
->x : Symbol(x, Decl(trailingCommasInFunctionParametersAndArguments.ts, 9, 20))
+>f3 : Symbol(f3, Decl(trailingCommasInFunctionParametersAndArguments.ts, 7, 11), Decl(trailingCommasInFunctionParametersAndArguments.ts, 10, 33))
+>x : Symbol(x, Decl(trailingCommasInFunctionParametersAndArguments.ts, 10, 20))
 
 declare function f3(x, y,): string;
->f3 : Symbol(f3, Decl(trailingCommasInFunctionParametersAndArguments.ts, 6, 11), Decl(trailingCommasInFunctionParametersAndArguments.ts, 9, 33))
->x : Symbol(x, Decl(trailingCommasInFunctionParametersAndArguments.ts, 10, 20))
->y : Symbol(y, Decl(trailingCommasInFunctionParametersAndArguments.ts, 10, 22))
+>f3 : Symbol(f3, Decl(trailingCommasInFunctionParametersAndArguments.ts, 7, 11), Decl(trailingCommasInFunctionParametersAndArguments.ts, 10, 33))
+>x : Symbol(x, Decl(trailingCommasInFunctionParametersAndArguments.ts, 11, 20))
+>y : Symbol(y, Decl(trailingCommasInFunctionParametersAndArguments.ts, 11, 22))
 
 <number>f3(1,);
->f3 : Symbol(f3, Decl(trailingCommasInFunctionParametersAndArguments.ts, 6, 11), Decl(trailingCommasInFunctionParametersAndArguments.ts, 9, 33))
+>f3 : Symbol(f3, Decl(trailingCommasInFunctionParametersAndArguments.ts, 7, 11), Decl(trailingCommasInFunctionParametersAndArguments.ts, 10, 33))
 
 <string>f3(1, 2,);
->f3 : Symbol(f3, Decl(trailingCommasInFunctionParametersAndArguments.ts, 6, 11), Decl(trailingCommasInFunctionParametersAndArguments.ts, 9, 33))
+>f3 : Symbol(f3, Decl(trailingCommasInFunctionParametersAndArguments.ts, 7, 11), Decl(trailingCommasInFunctionParametersAndArguments.ts, 10, 33))
 
 // Works for constructors too
 class X {
->X : Symbol(X, Decl(trailingCommasInFunctionParametersAndArguments.ts, 13, 18))
+>X : Symbol(X, Decl(trailingCommasInFunctionParametersAndArguments.ts, 14, 18))
 
     constructor(a,) { }
->a : Symbol(a, Decl(trailingCommasInFunctionParametersAndArguments.ts, 17, 16))
+>a : Symbol(a, Decl(trailingCommasInFunctionParametersAndArguments.ts, 18, 16))
+
+    // See trailingCommasInGetter.ts
+    set x(value,) { }
+>x : Symbol(X.x, Decl(trailingCommasInFunctionParametersAndArguments.ts, 18, 23))
+>value : Symbol(value, Decl(trailingCommasInFunctionParametersAndArguments.ts, 20, 10))
 }
+interface Y {
+>Y : Symbol(Y, Decl(trailingCommasInFunctionParametersAndArguments.ts, 21, 1))
+
+    new(x,);
+>x : Symbol(x, Decl(trailingCommasInFunctionParametersAndArguments.ts, 23, 8))
+
+    (x,);
+>x : Symbol(x, Decl(trailingCommasInFunctionParametersAndArguments.ts, 24, 5))
+}
+
 new X(1,);
->X : Symbol(X, Decl(trailingCommasInFunctionParametersAndArguments.ts, 13, 18))
+>X : Symbol(X, Decl(trailingCommasInFunctionParametersAndArguments.ts, 14, 18))
 
diff --git a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types
index 36de78fc8b8..9e2aa0abd8a 100644
--- a/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types
+++ b/tests/baselines/reference/trailingCommasInFunctionParametersAndArguments.types
@@ -1,4 +1,5 @@
 === tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts ===
+
 function f1(x,) {}
 >f1 : (x: any) => void
 >x : any
@@ -47,7 +48,22 @@ class X {
 
     constructor(a,) { }
 >a : any
+
+    // See trailingCommasInGetter.ts
+    set x(value,) { }
+>x : any
+>value : any
 }
+interface Y {
+>Y : Y
+
+    new(x,);
+>x : any
+
+    (x,);
+>x : any
+}
+
 new X(1,);
 >new X(1,) : X
 >X : typeof X
diff --git a/tests/baselines/reference/trailingCommasInGetter.errors.txt b/tests/baselines/reference/trailingCommasInGetter.errors.txt
new file mode 100644
index 00000000000..c4c491a73b7
--- /dev/null
+++ b/tests/baselines/reference/trailingCommasInGetter.errors.txt
@@ -0,0 +1,10 @@
+tests/cases/conformance/es7/trailingCommasInGetter.ts(2,11): error TS1138: Parameter declaration expected.
+
+
+==== tests/cases/conformance/es7/trailingCommasInGetter.ts (1 errors) ====
+    class X {
+        get x(,) { return 0; }
+              ~
+!!! error TS1138: Parameter declaration expected.
+    }
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/trailingCommasInGetter.js b/tests/baselines/reference/trailingCommasInGetter.js
new file mode 100644
index 00000000000..926545a8cba
--- /dev/null
+++ b/tests/baselines/reference/trailingCommasInGetter.js
@@ -0,0 +1,17 @@
+//// [trailingCommasInGetter.ts]
+class X {
+    get x(,) { return 0; }
+}
+
+
+//// [trailingCommasInGetter.js]
+var X = (function () {
+    function X() {
+    }
+    Object.defineProperty(X.prototype, "x", {
+        get: function () { return 0; },
+        enumerable: true,
+        configurable: true
+    });
+    return X;
+}());
diff --git a/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts b/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
index 5f48920e4dd..6b57235cbeb 100644
--- a/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
+++ b/tests/cases/conformance/es7/trailingCommasInFunctionParametersAndArguments.ts
@@ -1,3 +1,5 @@
+// @target: es5
+
 function f1(x,) {}
 
 f1(1,);
@@ -16,8 +18,7 @@ declare function f3(x, y,): string;
 // Works for constructors too
 class X {
     constructor(a,) { }
-    // *Not* allowed in getter
-    get x(,) { return 0; }
+    // See trailingCommasInGetter.ts
     set x(value,) { }
 }
 interface Y {
diff --git a/tests/cases/conformance/es7/trailingCommasInGetter.ts b/tests/cases/conformance/es7/trailingCommasInGetter.ts
new file mode 100644
index 00000000000..a1b2cf60b2c
--- /dev/null
+++ b/tests/cases/conformance/es7/trailingCommasInGetter.ts
@@ -0,0 +1,3 @@
+class X {
+    get x(,) { return 0; }
+}

From 843aa6c1effe8365bb461a4a953d55eeb5dfa7cf Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 7 Jun 2016 07:51:34 -0700
Subject: [PATCH 192/332] Allow case comparison to undefined and null in strict
 null checking mode

---
 src/compiler/checker.ts                       |  2 +-
 ...llyTypedObjectLiteralReturnType.errors.txt | 18 ++++++++++++++++
 ...ontextuallyTypedObjectLiteralReturnType.js | 21 +++++++++++++++++++
 .../reference/equalityStrictNulls.errors.txt  | 10 +++++++++
 .../reference/equalityStrictNulls.js          | 20 ++++++++++++++++++
 tests/cases/compiler/inferFromConstraints.ts  |  9 ++++++++
 ...ontextuallyTypedObjectLiteralReturnType.ts |  9 ++++++++
 .../comparable/equalityStrictNulls.ts         | 10 +++++++++
 8 files changed, 98 insertions(+), 1 deletion(-)
 create mode 100644 tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.errors.txt
 create mode 100644 tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.js
 create mode 100644 tests/cases/compiler/inferFromConstraints.ts
 create mode 100644 tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index be21090d780..60acefb6045 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -15106,7 +15106,7 @@ namespace ts {
                     // In a 'switch' statement, each 'case' expression must be of a type that is comparable
                     // to or from the type of the 'switch' expression.
                     const caseType = checkExpression(caseClause.expression);
-                    if (!isTypeComparableTo(expressionType, caseType)) {
+                    if (!isTypeEqualityComparableTo(expressionType, caseType)) {
                         // expressionType is not comparable to caseType, try the reversed check and report errors if it fails
                         checkTypeComparableTo(caseType, expressionType, caseClause.expression, /*headMessage*/ undefined);
                     }
diff --git a/tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.errors.txt b/tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.errors.txt
new file mode 100644
index 00000000000..b010de0f761
--- /dev/null
+++ b/tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.errors.txt
@@ -0,0 +1,18 @@
+tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts(6,24): error TS7024: Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.
+tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts(7,38): error TS2339: Property 'length' does not exist on type 'number'.
+
+
+==== tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts (2 errors) ====
+    function id<T>(x: T): T { return x };
+    // Correct: type of fnWrapper is (y: number) => { y: number }
+    var fn = function(y: number) { return { y } };
+    var fnWrapper = id(fn);
+    // Incorrect: type of inlineWrapper is (z: number) => any 
+    var inlineWrapper = id(function(z: number) { return { z } });
+                           ~~~~~~~~
+!!! error TS7024: Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.
+    let error1: number = fnWrapper(12).y.length; // should error
+                                         ~~~~~~
+!!! error TS2339: Property 'length' does not exist on type 'number'.
+    let error2: number = inlineWrapper(12).z.length; // should error
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.js b/tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.js
new file mode 100644
index 00000000000..b687eaab5f5
--- /dev/null
+++ b/tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.js
@@ -0,0 +1,21 @@
+//// [contextuallyTypedObjectLiteralReturnType.ts]
+function id<T>(x: T): T { return x };
+// Correct: type of fnWrapper is (y: number) => { y: number }
+var fn = function(y: number) { return { y } };
+var fnWrapper = id(fn);
+// Incorrect: type of inlineWrapper is (z: number) => any 
+var inlineWrapper = id(function(z: number) { return { z } });
+let error1: number = fnWrapper(12).y.length; // should error
+let error2: number = inlineWrapper(12).z.length; // should error
+
+
+//// [contextuallyTypedObjectLiteralReturnType.js]
+function id(x) { return x; }
+;
+// Correct: type of fnWrapper is (y: number) => { y: number }
+var fn = function (y) { return { y: y }; };
+var fnWrapper = id(fn);
+// Incorrect: type of inlineWrapper is (z: number) => any 
+var inlineWrapper = id(function (z) { return { z: z }; });
+var error1 = fnWrapper(12).y.length; // should error
+var error2 = inlineWrapper(12).z.length; // should error
diff --git a/tests/baselines/reference/equalityStrictNulls.errors.txt b/tests/baselines/reference/equalityStrictNulls.errors.txt
index 54b581c87e6..e0793542b84 100644
--- a/tests/baselines/reference/equalityStrictNulls.errors.txt
+++ b/tests/baselines/reference/equalityStrictNulls.errors.txt
@@ -81,4 +81,14 @@ tests/cases/conformance/types/typeRelationships/comparable/equalityStrictNulls.t
 !!! error TS2365: Operator '<=' cannot be applied to types 'number' and 'undefined'.
         }
     }
+    function f5(x: string) {
+        switch(x) {
+            case null:
+                break;
+            case undefined:
+                break;
+            default:
+                return;
+        }
+    }
     
\ No newline at end of file
diff --git a/tests/baselines/reference/equalityStrictNulls.js b/tests/baselines/reference/equalityStrictNulls.js
index 99ff801a52c..e34e9fe9989 100644
--- a/tests/baselines/reference/equalityStrictNulls.js
+++ b/tests/baselines/reference/equalityStrictNulls.js
@@ -67,6 +67,16 @@ function f4(x: number) {
     if (x <= undefined) {
     }
 }
+function f5(x: string) {
+    switch(x) {
+        case null:
+            break;
+        case undefined:
+            break;
+        default:
+            return;
+    }
+}
 
 
 //// [equalityStrictNulls.js]
@@ -134,3 +144,13 @@ function f4(x) {
     if (x <= undefined) {
     }
 }
+function f5(x) {
+    switch (x) {
+        case null:
+            break;
+        case undefined:
+            break;
+        default:
+            return;
+    }
+}
diff --git a/tests/cases/compiler/inferFromConstraints.ts b/tests/cases/compiler/inferFromConstraints.ts
new file mode 100644
index 00000000000..d41d5ce7c46
--- /dev/null
+++ b/tests/cases/compiler/inferFromConstraints.ts
@@ -0,0 +1,9 @@
+interface Ctor<T> {
+    new(): T;
+}
+// declare function create1<T>(ctor: Ctor<T>): T;
+declare function create2<T, C extends Ctor<T>>(ctor: C): T;
+
+class A { a: number }
+// let a1 = create1(A).a; // a: A --> OK
+let a2 = create2(A).a; // a: {} --> Should be A
diff --git a/tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts b/tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts
new file mode 100644
index 00000000000..5e4500d1cb9
--- /dev/null
+++ b/tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts
@@ -0,0 +1,9 @@
+// @noImplicitAny: true
+function id<T>(x: T): T { return x };
+// Correct: type of fnWrapper is (y: number) => { y: number }
+var fn = function(y: number) { return { y } };
+var fnWrapper = id(fn);
+// Incorrect: type of inlineWrapper is (z: number) => any 
+var inlineWrapper = id(function(z: number) { return { z } });
+let error1: number = fnWrapper(12).y.length; // should error
+let error2: number = inlineWrapper(12).z.length; // should error
diff --git a/tests/cases/conformance/types/typeRelationships/comparable/equalityStrictNulls.ts b/tests/cases/conformance/types/typeRelationships/comparable/equalityStrictNulls.ts
index 6b2744e8849..da46ab37a2a 100644
--- a/tests/cases/conformance/types/typeRelationships/comparable/equalityStrictNulls.ts
+++ b/tests/cases/conformance/types/typeRelationships/comparable/equalityStrictNulls.ts
@@ -67,3 +67,13 @@ function f4(x: number) {
     if (x <= undefined) {
     }
 }
+function f5(x: string) {
+    switch(x) {
+        case null:
+            break;
+        case undefined:
+            break;
+        default:
+            return;
+    }
+}

From b4f12144d2c9571aa48db44cfc3778c3e721bec9 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 7 Jun 2016 08:17:28 -0700
Subject: [PATCH 193/332] Remove incorrectly added tests

---
 ...llyTypedObjectLiteralReturnType.errors.txt | 18 ----------------
 ...ontextuallyTypedObjectLiteralReturnType.js | 21 -------------------
 tests/cases/compiler/inferFromConstraints.ts  |  9 --------
 ...ontextuallyTypedObjectLiteralReturnType.ts |  9 --------
 4 files changed, 57 deletions(-)
 delete mode 100644 tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.errors.txt
 delete mode 100644 tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.js
 delete mode 100644 tests/cases/compiler/inferFromConstraints.ts
 delete mode 100644 tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts

diff --git a/tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.errors.txt b/tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.errors.txt
deleted file mode 100644
index b010de0f761..00000000000
--- a/tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.errors.txt
+++ /dev/null
@@ -1,18 +0,0 @@
-tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts(6,24): error TS7024: Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.
-tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts(7,38): error TS2339: Property 'length' does not exist on type 'number'.
-
-
-==== tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts (2 errors) ====
-    function id<T>(x: T): T { return x };
-    // Correct: type of fnWrapper is (y: number) => { y: number }
-    var fn = function(y: number) { return { y } };
-    var fnWrapper = id(fn);
-    // Incorrect: type of inlineWrapper is (z: number) => any 
-    var inlineWrapper = id(function(z: number) { return { z } });
-                           ~~~~~~~~
-!!! error TS7024: Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions.
-    let error1: number = fnWrapper(12).y.length; // should error
-                                         ~~~~~~
-!!! error TS2339: Property 'length' does not exist on type 'number'.
-    let error2: number = inlineWrapper(12).z.length; // should error
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.js b/tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.js
deleted file mode 100644
index b687eaab5f5..00000000000
--- a/tests/baselines/reference/contextuallyTypedObjectLiteralReturnType.js
+++ /dev/null
@@ -1,21 +0,0 @@
-//// [contextuallyTypedObjectLiteralReturnType.ts]
-function id<T>(x: T): T { return x };
-// Correct: type of fnWrapper is (y: number) => { y: number }
-var fn = function(y: number) { return { y } };
-var fnWrapper = id(fn);
-// Incorrect: type of inlineWrapper is (z: number) => any 
-var inlineWrapper = id(function(z: number) { return { z } });
-let error1: number = fnWrapper(12).y.length; // should error
-let error2: number = inlineWrapper(12).z.length; // should error
-
-
-//// [contextuallyTypedObjectLiteralReturnType.js]
-function id(x) { return x; }
-;
-// Correct: type of fnWrapper is (y: number) => { y: number }
-var fn = function (y) { return { y: y }; };
-var fnWrapper = id(fn);
-// Incorrect: type of inlineWrapper is (z: number) => any 
-var inlineWrapper = id(function (z) { return { z: z }; });
-var error1 = fnWrapper(12).y.length; // should error
-var error2 = inlineWrapper(12).z.length; // should error
diff --git a/tests/cases/compiler/inferFromConstraints.ts b/tests/cases/compiler/inferFromConstraints.ts
deleted file mode 100644
index d41d5ce7c46..00000000000
--- a/tests/cases/compiler/inferFromConstraints.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-interface Ctor<T> {
-    new(): T;
-}
-// declare function create1<T>(ctor: Ctor<T>): T;
-declare function create2<T, C extends Ctor<T>>(ctor: C): T;
-
-class A { a: number }
-// let a1 = create1(A).a; // a: A --> OK
-let a2 = create2(A).a; // a: {} --> Should be A
diff --git a/tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts b/tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts
deleted file mode 100644
index 5e4500d1cb9..00000000000
--- a/tests/cases/conformance/types/contextualTypes/methodDeclarations/contextuallyTypedObjectLiteralReturnType.ts
+++ /dev/null
@@ -1,9 +0,0 @@
-// @noImplicitAny: true
-function id<T>(x: T): T { return x };
-// Correct: type of fnWrapper is (y: number) => { y: number }
-var fn = function(y: number) { return { y } };
-var fnWrapper = id(fn);
-// Incorrect: type of inlineWrapper is (z: number) => any 
-var inlineWrapper = id(function(z: number) { return { z } });
-let error1: number = fnWrapper(12).y.length; // should error
-let error2: number = inlineWrapper(12).z.length; // should error

From d941177547741af17ae692b8065f5a03ab3382c5 Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Tue, 7 Jun 2016 15:08:46 -0700
Subject: [PATCH 194/332] check if moduleResolution when verifying that program
 can be reused

---
 src/compiler/program.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index bab554927e7..5b64d066da1 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -1143,6 +1143,7 @@ namespace ts {
             // if any of these properties has changed - structure cannot be reused
             const oldOptions = oldProgram.getCompilerOptions();
             if ((oldOptions.module !== options.module) ||
+                (oldOptions.moduleResolution !== options.moduleResolution) ||
                 (oldOptions.noResolve !== options.noResolve) ||
                 (oldOptions.target !== options.target) ||
                 (oldOptions.noLib !== options.noLib) ||

From 37949a3d65fefacff6527c3551e60819176d1e10 Mon Sep 17 00:00:00 2001
From: Zhengbo Li <zhengbli@microsoft.com>
Date: Tue, 7 Jun 2016 15:52:34 -0700
Subject: [PATCH 195/332] more tests for module resolution change and exclude

---
 src/compiler/program.ts                       |   1 +
 src/server/editorServices.ts                  |   2 +-
 src/services/services.ts                      |   1 +
 .../cases/unittests/tsserverProjectSystem.ts  | 194 ++++++++++++++----
 4 files changed, 159 insertions(+), 39 deletions(-)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index bab554927e7..5b64d066da1 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -1143,6 +1143,7 @@ namespace ts {
             // if any of these properties has changed - structure cannot be reused
             const oldOptions = oldProgram.getCompilerOptions();
             if ((oldOptions.module !== options.module) ||
+                (oldOptions.moduleResolution !== options.moduleResolution) ||
                 (oldOptions.noResolve !== options.noResolve) ||
                 (oldOptions.target !== options.target) ||
                 (oldOptions.noLib !== options.noLib) ||
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 8eae43b503d..628522c7aa6 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -268,7 +268,7 @@ namespace ts.server {
         }
 
         removeRoot(info: ScriptInfo) {
-            if (!this.filenameToScript.contains(info.path)) {
+            if (this.filenameToScript.contains(info.path)) {
                 this.filenameToScript.remove(info.path);
                 this.roots = copyListRemovingItem(info, this.roots);
                 this.resolvedModuleNames.remove(info.path);
diff --git a/src/services/services.ts b/src/services/services.ts
index 90740b257c6..f39eb60a819 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -2919,6 +2919,7 @@ namespace ts {
             const changesInCompilationSettingsAffectSyntax = oldSettings &&
                 (oldSettings.target !== newSettings.target ||
                  oldSettings.module !== newSettings.module ||
+                 oldSettings.moduleResolution !== newSettings.moduleResolution ||
                  oldSettings.noResolve !== newSettings.noResolve ||
                  oldSettings.jsx !== newSettings.jsx ||
                  oldSettings.allowJs !== newSettings.allowJs);
diff --git a/tests/cases/unittests/tsserverProjectSystem.ts b/tests/cases/unittests/tsserverProjectSystem.ts
index e5b140237e5..103e5bc7d9b 100644
--- a/tests/cases/unittests/tsserverProjectSystem.ts
+++ b/tests/cases/unittests/tsserverProjectSystem.ts
@@ -107,11 +107,11 @@ namespace ts {
         }
     }
 
-    function checkConfiguredProjectNumber(projectService: server.ProjectService, expected: number) {
+    function checkNumberOfConfiguredProjects(projectService: server.ProjectService, expected: number) {
         assert.equal(projectService.configuredProjects.length, expected, `expected ${expected} configured project(s)`);
     }
 
-    function checkInferredProjectNumber(projectService: server.ProjectService, expected: number) {
+    function checkNumberOfInferredProjects(projectService: server.ProjectService, expected: number) {
         assert.equal(projectService.inferredProjects.length, expected, `expected ${expected} inferred project(s)`);
     }
 
@@ -131,6 +131,8 @@ namespace ts {
         checkFileNames("configuredProjects project, rootFileNames", project.getRootFiles(), expectedFiles);
     }
 
+    type TimeOutCallback = () => any;
+
     class TestServerHost implements server.ServerHost {
         args: string[] = [];
         newLine: "\n";
@@ -138,6 +140,7 @@ namespace ts {
         private fs: ts.FileMap<FSEntry>;
         private getCanonicalFileName: (s: string) => string;
         private toPath: (f: string) => Path;
+        private callbackQueue: TimeOutCallback[] = [];
         readonly watchedDirectories: Map<{ cb: DirectoryWatcherCallback, recursive: boolean }[]> = {};
         readonly watchedFiles: Map<FileWatcherCallback[]> = {};
 
@@ -222,12 +225,12 @@ namespace ts {
             }
         }
 
-        triggerFileWatcherCallback(fileName: string): void {
+        triggerFileWatcherCallback(fileName: string, removed?: boolean): void {
             const path = this.toPath(fileName);
             const callbacks = lookUp(this.watchedFiles, path);
             if (callbacks) {
                 for (const callback of callbacks) {
-                    callback(path, /*removed*/ true);
+                    callback(path, removed);
                 }
             }
         }
@@ -248,8 +251,27 @@ namespace ts {
         }
 
         // TOOD: record and invoke callbacks to simulate timer events
-        readonly setTimeout = setTimeout;
-        readonly clearTimeout = (timeoutId: any): void => void 0;
+        readonly setTimeout = (callback: TimeOutCallback, time: number) => {
+            this.callbackQueue.push(callback);
+            return this.callbackQueue.length - 1;
+        };
+        readonly clearTimeout = (timeoutId: any): void => {
+            if (typeof timeoutId === "number") {
+                this.callbackQueue.splice(timeoutId, 1);
+            }
+        };
+
+        checkTimeoutQueueLength(expected: number) {
+            assert.equal(this.callbackQueue.length, expected, `expected ${expected} timeout callbacks queued but found ${this.callbackQueue.length}.`);
+        }
+
+        runQueuedTimeoutCallbacks() {
+            for (const callback of this.callbackQueue) {
+                callback();
+            }
+            this.callbackQueue = [];
+        }
+
         readonly readFile = (s: string) => (<File>this.fs.get(this.toPath(s))).content;
         readonly resolvePath = (s: string) => s;
         readonly getExecutingFilePath = () => this.executingFilePath;
@@ -292,8 +314,8 @@ namespace ts {
             const { configFileName } = projectService.openClientFile(appFile.path);
 
             assert(!configFileName, `should not find config, got: '${configFileName}`);
-            checkConfiguredProjectNumber(projectService, 0);
-            checkInferredProjectNumber(projectService, 1);
+            checkNumberOfConfiguredProjects(projectService, 0);
+            checkNumberOfInferredProjects(projectService, 1);
 
             const project = projectService.inferredProjects[0];
 
@@ -331,8 +353,8 @@ namespace ts {
 
             assert(configFileName, "should find config file");
             assert.isTrue(!configFileErrors, `expect no errors in config file, got ${JSON.stringify(configFileErrors)}`);
-            checkInferredProjectNumber(projectService, 0);
-            checkConfiguredProjectNumber(projectService, 1);
+            checkNumberOfInferredProjects(projectService, 0);
+            checkNumberOfConfiguredProjects(projectService, 1);
 
             const project = projectService.configuredProjects[0];
             checkConfiguredProjectActualFiles(project, [file1.path, libFile.path, file2.path]);
@@ -356,27 +378,28 @@ namespace ts {
             projectService.openClientFile(commonFile1.path);
             projectService.openClientFile(commonFile2.path);
 
-            checkInferredProjectNumber(projectService, 2);
+            checkNumberOfInferredProjects(projectService, 2);
             checkWatchedDirectories(host, ["/a/b", "/a"]);
 
             // Add a tsconfig file
             host.reloadFS(filesWithConfig);
             host.triggerDirectoryWatcherCallback("/a/b", configFile.path);
 
-            checkInferredProjectNumber(projectService, 1);
-            checkConfiguredProjectNumber(projectService, 1);
+            checkNumberOfInferredProjects(projectService, 1);
+            checkNumberOfConfiguredProjects(projectService, 1);
             // watching all files except one that was open
             checkWatchedFiles(host, [libFile.path, configFile.path]);
 
             // remove the tsconfig file
             host.reloadFS(filesWithoutConfig);
             host.triggerFileWatcherCallback(configFile.path);
-            checkInferredProjectNumber(projectService, 2);
-            checkConfiguredProjectNumber(projectService, 0);
+
+            checkNumberOfInferredProjects(projectService, 2);
+            checkNumberOfConfiguredProjects(projectService, 0);
             checkWatchedDirectories(host, ["/a/b", "/a"]);
         });
 
-        it("add new files to a configured project without file list", (done: () => void) => {
+        it("add new files to a configured project without file list", () => {
             const configFile: FileOrFolder = {
                 path: "/a/b/tsconfig.json",
                 content: `{}`
@@ -385,7 +408,7 @@ namespace ts {
             const projectService = new server.ProjectService(host, nullLogger);
             projectService.openClientFile(commonFile1.path);
             checkWatchedDirectories(host, ["/a/b"]);
-            checkConfiguredProjectNumber(projectService, 1);
+            checkNumberOfConfiguredProjects(projectService, 1);
 
             const project = projectService.configuredProjects[0];
             checkConfiguredProjectRootFiles(project, [commonFile1.path]);
@@ -393,11 +416,9 @@ namespace ts {
             // add a new ts file
             host.reloadFS([commonFile1, commonFile2, libFile, configFile]);
             host.triggerDirectoryWatcherCallback("/a/b", commonFile2.path);
+            host.runQueuedTimeoutCallbacks();
             // project service waits for 250ms to update the project structure, therefore the assertion needs to wait longer.
-            setTimeout(() => {
-                checkConfiguredProjectRootFiles(project, [commonFile1.path, commonFile2.path]);
-                done();
-            }, 1000);
+            checkConfiguredProjectRootFiles(project, [commonFile1.path, commonFile2.path]);
         });
 
         it("should ignore non-existing files specified in the config file", () => {
@@ -416,13 +437,13 @@ namespace ts {
             projectService.openClientFile(commonFile1.path);
             projectService.openClientFile(commonFile2.path);
 
-            checkConfiguredProjectNumber(projectService, 1);
+            checkNumberOfConfiguredProjects(projectService, 1);
             const project = projectService.configuredProjects[0];
             checkConfiguredProjectRootFiles(project, [commonFile1.path]);
-            checkInferredProjectNumber(projectService, 1);
+            checkNumberOfInferredProjects(projectService, 1);
         });
 
-        it("handle recreated files correctly", (done: () => void) => {
+        it("handle recreated files correctly", () => {
             const configFile: FileOrFolder = {
                 path: "/a/b/tsconfig.json",
                 content: `{}`
@@ -431,23 +452,120 @@ namespace ts {
             const projectService = new server.ProjectService(host, nullLogger);
             projectService.openClientFile(commonFile1.path);
 
-            checkConfiguredProjectNumber(projectService, 1);
+            checkNumberOfConfiguredProjects(projectService, 1);
             const project = projectService.configuredProjects[0];
             checkConfiguredProjectRootFiles(project, [commonFile1.path, commonFile2.path]);
 
-            // delete commonFile1
-            projectService.closeClientFile(commonFile1.path);
-            host.reloadFS([configFile]);
-            host.triggerDirectoryWatcherCallback("/a/b", commonFile1.path);
-            host.setTimeout(() => {
-                // re-add commonFile1
-                host.reloadFS([commonFile1, configFile]);
-                projectService.openClientFile(commonFile1.path);
-                host.setTimeout(() => {
-                    checkConfiguredProjectRootFiles(project, [commonFile1.path, commonFile2.path]);
-                    done();
-                }, 500);
-            }, 500);
+            // delete commonFile2
+            host.reloadFS([commonFile1, configFile]);
+            host.triggerDirectoryWatcherCallback("/a/b", commonFile2.path);
+            host.runQueuedTimeoutCallbacks();
+            checkConfiguredProjectRootFiles(project, [commonFile1.path]);
+
+            // re-add commonFile2
+            host.reloadFS([commonFile1, commonFile2, configFile]);
+            host.triggerDirectoryWatcherCallback("/a/b", commonFile2.path);
+            host.runQueuedTimeoutCallbacks();
+            checkConfiguredProjectRootFiles(project, [commonFile1.path, commonFile2.path]);
         });
+
+        it("should create new inferred projects for files excluded from a configured project", () => {
+            const configFile: FileOrFolder = {
+                path: "/a/b/tsconfig.json",
+                content: `{
+                    "compilerOptions": {},
+                    "files": ["${commonFile1.path}", "${commonFile2.path}"]
+                }`
+            };
+            const files = [commonFile1, commonFile2, configFile];
+            const host = new TestServerHost(/*useCaseSensitiveFileNames*/ false, getExecutingFilePathFromLibFile(libFile), "/", files);
+            const projectService = new server.ProjectService(host, nullLogger);
+            projectService.openClientFile(commonFile1.path);
+
+            const project = projectService.configuredProjects[0];
+            checkConfiguredProjectRootFiles(project, [commonFile1.path, commonFile2.path]);
+            configFile.content = `{
+                "compilerOptions": {},
+                "files": ["${commonFile1.path}"]
+            }`;
+            host.reloadFS(files);
+            host.triggerFileWatcherCallback(configFile.path);
+
+            checkNumberOfConfiguredProjects(projectService, 1);
+            checkConfiguredProjectRootFiles(project, [commonFile1.path]);
+
+            projectService.openClientFile(commonFile2.path);
+            checkNumberOfInferredProjects(projectService, 1);
+        });
+
+        it("files explicitly excluded in config file", () => {
+            const configFile: FileOrFolder = {
+                path: "/a/b/tsconfig.json",
+                content: `{
+                    "compilerOptions": {},
+                    "exclude": ["/a/c"]
+                }`
+            };
+            const excludedFile1: FileOrFolder = {
+                path: "/a/c/excluedFile1.ts",
+                content: `let t = 1;`
+            };
+
+            const host = new TestServerHost(/*useCaseSensitiveFileNames*/ false, getExecutingFilePathFromLibFile(libFile), "/", [commonFile1, commonFile2, excludedFile1, configFile]);
+            const projectService = new server.ProjectService(host, nullLogger);
+
+            projectService.openClientFile(commonFile1.path);
+            checkNumberOfConfiguredProjects(projectService, 1);
+            const project = projectService.configuredProjects[0];
+            checkConfiguredProjectRootFiles(project, [commonFile1.path, commonFile2.path]);
+            projectService.openClientFile(excludedFile1.path);
+            checkNumberOfInferredProjects(projectService, 1);
+        });
+
+        it("should properly handle module resolution changes in config file", () => {
+            const file1: FileOrFolder = {
+                path: "/a/b/file1.ts",
+                content: `import { T } from "module1";`
+            }
+            const nodeModuleFile: FileOrFolder = {
+                path: "/a/b/node_modules/module1.ts",
+                content: `export interface T {}`
+            }
+            const classicModuleFile: FileOrFolder = {
+                path: "/a/module1.ts",
+                content: `export interface T {}`
+            }
+            const configFile: FileOrFolder = {
+                path: "/a/b/tsconfig.json",
+                content: `{
+                    "compilerOptions": {
+                        "moduleResolution": "node"
+                    },
+                    "files": ["${file1.path}"]
+                }`
+            };
+            const files = [file1, nodeModuleFile, classicModuleFile, configFile];
+            const host = new TestServerHost(/*useCaseSensitiveFileNames*/ false, getExecutingFilePathFromLibFile(libFile), "/", files);
+            const projectService = new server.ProjectService(host, nullLogger);
+            projectService.openClientFile(file1.path);
+            projectService.openClientFile(nodeModuleFile.path);
+            projectService.openClientFile(classicModuleFile.path);
+
+            checkNumberOfConfiguredProjects(projectService, 1);
+            const project = projectService.configuredProjects[0];
+            checkConfiguredProjectActualFiles(project, [file1.path, nodeModuleFile.path]);
+            checkNumberOfInferredProjects(projectService, 1);
+
+            configFile.content = `{
+                "compilerOptions": {
+                    "moduleResolution": "classic"
+                },
+                "files": ["${file1.path}"]
+            }`;
+            host.reloadFS(files);
+            host.triggerFileWatcherCallback(configFile.path);
+            checkConfiguredProjectActualFiles(project, [file1.path, classicModuleFile.path]);
+            checkNumberOfInferredProjects(projectService, 1);
+        })
     });
 }
\ No newline at end of file

From 78792df4db2641a6c1b840581c3e064e7c5da39f Mon Sep 17 00:00:00 2001
From: Zhengbo Li <zhengbli@microsoft.com>
Date: Tue, 7 Jun 2016 16:11:42 -0700
Subject: [PATCH 196/332] Fix linting issues

---
 tests/cases/unittests/tsserverProjectSystem.ts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tests/cases/unittests/tsserverProjectSystem.ts b/tests/cases/unittests/tsserverProjectSystem.ts
index 103e5bc7d9b..cf382d09463 100644
--- a/tests/cases/unittests/tsserverProjectSystem.ts
+++ b/tests/cases/unittests/tsserverProjectSystem.ts
@@ -526,15 +526,15 @@ namespace ts {
             const file1: FileOrFolder = {
                 path: "/a/b/file1.ts",
                 content: `import { T } from "module1";`
-            }
+            };
             const nodeModuleFile: FileOrFolder = {
                 path: "/a/b/node_modules/module1.ts",
                 content: `export interface T {}`
-            }
+            };
             const classicModuleFile: FileOrFolder = {
                 path: "/a/module1.ts",
                 content: `export interface T {}`
-            }
+            };
             const configFile: FileOrFolder = {
                 path: "/a/b/tsconfig.json",
                 content: `{
@@ -566,6 +566,6 @@ namespace ts {
             host.triggerFileWatcherCallback(configFile.path);
             checkConfiguredProjectActualFiles(project, [file1.path, classicModuleFile.path]);
             checkNumberOfInferredProjects(projectService, 1);
-        })
+        });
     });
 }
\ No newline at end of file

From 17cc20627175c702f217dd0d0281602c5ea4a32d Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 7 Jun 2016 16:22:18 -0700
Subject: [PATCH 197/332] Merge JSDoc of assignments from function expressions

---
 src/compiler/utilities.ts                     |  8 ++--
 src/services/services.ts                      | 47 +++++++++++++------
 tests/cases/fourslash/commentsFunction.ts     | 34 ++++++++++++--
 .../fourslash/getJavaScriptQuickInfo7.ts      |  4 +-
 4 files changed, 71 insertions(+), 22 deletions(-)

diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index d246b55556c..ee7887c1e86 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -603,9 +603,11 @@ namespace ts {
     }
 
     export function getJsDocCommentsFromText(node: Node, text: string) {
-        const commentRanges = (node.kind === SyntaxKind.Parameter || node.kind === SyntaxKind.TypeParameter) ?
-            concatenate(getTrailingCommentRanges(text, node.pos),
-                getLeadingCommentRanges(text, node.pos)) :
+        const commentRanges = (node.kind === SyntaxKind.Parameter ||
+                               node.kind === SyntaxKind.TypeParameter ||
+                               node.kind === SyntaxKind.FunctionExpression ||
+                               node.kind === SyntaxKind.ArrowFunction) ?
+            concatenate(getTrailingCommentRanges(text, node.pos), getLeadingCommentRanges(text, node.pos)) :
             getLeadingCommentRangesOfNodeFromText(node, text);
         return filter(commentRanges, isJsDocComment);
 
diff --git a/src/services/services.ts b/src/services/services.ts
index 34b521b3496..906ec2ae0d3 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -406,12 +406,11 @@ namespace ts {
                     const sourceFileOfDeclaration = getSourceFileOfNode(declaration);
                     // If it is parameter - try and get the jsDoc comment with @param tag from function declaration's jsDoc comments
                     if (canUseParsedParamTagComments && declaration.kind === SyntaxKind.Parameter) {
-                        ts.forEach(getJsDocCommentTextRange(declaration.parent, sourceFileOfDeclaration), jsDocCommentTextRange => {
-                            const cleanedParamJsDocComment = getCleanedParamJsDocComment(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration);
-                            if (cleanedParamJsDocComment) {
-                                addRange(jsDocCommentParts, cleanedParamJsDocComment);
-                            }
-                        });
+                        if ((declaration.parent.kind === SyntaxKind.FunctionExpression || declaration.parent.kind === SyntaxKind.ArrowFunction) &&
+                            declaration.parent.parent.kind === SyntaxKind.VariableDeclaration) {
+                            addCommentParts(declaration.parent.parent.parent, sourceFileOfDeclaration, getCleanedParamJsDocComment);
+                        }
+                        addCommentParts(declaration.parent, sourceFileOfDeclaration, getCleanedParamJsDocComment);
                     }
 
                     // If this is left side of dotted module declaration, there is no doc comments associated with this node
@@ -419,24 +418,44 @@ namespace ts {
                         return;
                     }
 
+                    if ((declaration.kind === SyntaxKind.FunctionExpression || declaration.kind === SyntaxKind.ArrowFunction) &&
+                        declaration.parent.kind === SyntaxKind.VariableDeclaration) {
+                        addCommentParts(declaration.parent.parent, sourceFileOfDeclaration, getCleanedJsDocComment);
+                    }
+
                     // If this is dotted module name, get the doc comments from the parent
                     while (declaration.kind === SyntaxKind.ModuleDeclaration && declaration.parent.kind === SyntaxKind.ModuleDeclaration) {
                         declaration = <ModuleDeclaration>declaration.parent;
                     }
+                    addCommentParts(declaration.kind === SyntaxKind.VariableDeclaration ? declaration.parent.parent : declaration,
+                                    sourceFileOfDeclaration,
+                                    getCleanedJsDocComment);
 
-                    // Get the cleaned js doc comment text from the declaration
-                    ts.forEach(getJsDocCommentTextRange(
-                        declaration.kind === SyntaxKind.VariableDeclaration ? declaration.parent.parent : declaration, sourceFileOfDeclaration), jsDocCommentTextRange => {
-                            const cleanedJsDocComment = getCleanedJsDocComment(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration);
-                            if (cleanedJsDocComment) {
-                                addRange(jsDocCommentParts, cleanedJsDocComment);
-                            }
-                        });
+                    if (declaration.kind === SyntaxKind.VariableDeclaration) {
+                        const init = (declaration as VariableDeclaration).initializer;
+                        if (init && (init.kind === SyntaxKind.FunctionExpression || init.kind === SyntaxKind.ArrowFunction)) {
+                            // Get the cleaned js doc comment text from the initializer
+                            addCommentParts(init, sourceFileOfDeclaration, getCleanedJsDocComment);
+                        }
+                    }
                 }
             });
 
             return jsDocCommentParts;
 
+            function addCommentParts(commented: Node,
+                                     sourceFileOfDeclaration: SourceFile,
+                                     getCommentPart: (pos: number, end: number, file: SourceFile) => SymbolDisplayPart[]): void {
+                const ranges = getJsDocCommentTextRange(commented, sourceFileOfDeclaration);
+                // Get the cleaned js doc comment text from the declaration
+                ts.forEach(ranges, jsDocCommentTextRange => {
+                    const cleanedComment = getCommentPart(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration);
+                    if (cleanedComment) {
+                        addRange(jsDocCommentParts, cleanedComment);
+                    }
+                });
+            }
+
             function getJsDocCommentTextRange(node: Node, sourceFile: SourceFile): TextRange[] {
                 return ts.map(getJsDocComments(node, sourceFile),
                     jsDocComment => {
diff --git a/tests/cases/fourslash/commentsFunction.ts b/tests/cases/fourslash/commentsFunction.ts
index ac1e7f5effd..34d9e463eb6 100644
--- a/tests/cases/fourslash/commentsFunction.ts
+++ b/tests/cases/fourslash/commentsFunction.ts
@@ -33,6 +33,20 @@
 ////    }
 ////    return lamb/*31*/daVar("World") + /*32*/a;
 ////}
+/////**
+//// * On variable
+//// * @param s the first parameter!
+//// * @returns the parameter's length
+//// */
+////var assi/*33*/gned = /**
+////                * Summary on expression
+////                * @param s param on expression
+////                * @returns return on expression
+////                */function(/** On parameter */s: string) {
+////  return s.length;
+////}
+////assig/*34*/ned/*35*/(/*36*/"hey");
+
 
 goTo.marker('1');
 verify.currentSignatureHelpDocCommentIs("This comment should appear for foo");
@@ -68,14 +82,15 @@ verify.completionListContains('a', '(parameter) a: string', 'this is comment abo
 verify.completionListContains('b', '(parameter) b: number', 'this is comment for b');
 
 goTo.marker('11');
-verify.quickInfoIs("var lambdaFoo: (a: number, b: number) => number", "lamdaFoo var comment");
+verify.quickInfoIs("var lambdaFoo: (a: number, b: number) => number", "lamdaFoo var comment\nthis is lambda comment");
 
 goTo.marker('12');
-verify.quickInfoIs("var lambddaNoVarComment: (a: number, b: number) => number", "");
+// pick up doccomments from the lambda itself
+verify.quickInfoIs("var lambddaNoVarComment: (a: number, b: number) => number", "this is lambda multiplication");
 
 goTo.marker('13');
-verify.completionListContains('lambdaFoo', 'var lambdaFoo: (a: number, b: number) => number', '');
-verify.completionListContains('lambddaNoVarComment', 'var lambddaNoVarComment: (a: number, b: number) => number', '');
+verify.completionListContains('lambdaFoo', 'var lambdaFoo: (a: number, b: number) => number', 'lamdaFoo var comment\nthis is lambda comment');
+verify.completionListContains('lambddaNoVarComment', 'var lambddaNoVarComment: (a: number, b: number) => number', 'this is lambda multiplication');
 
 goTo.marker('14');
 verify.currentParameterHelpArgumentDocCommentIs("param a");
@@ -129,3 +144,14 @@ goTo.marker('31');
 verify.quickInfoIs('(local var) lambdaVar: (b: string) => string', '');
 goTo.marker('32');
 verify.quickInfoIs('(parameter) a: number', '');
+
+goTo.marker('33');
+verify.quickInfoIs("var assigned: (s: string) => number", "On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
+goTo.marker('34');
+verify.quickInfoIs("var assigned: (s: string) => number", "On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
+goTo.marker('35');
+verify.completionListContains("assigned", "var assigned: (s: string) => number", "On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
+goTo.marker('36');
+verify.currentSignatureHelpDocCommentIs("On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
+verify.currentParameterHelpArgumentDocCommentIs("param on expression\nthe first parameter!\nOn parameter ");
+
diff --git a/tests/cases/fourslash/getJavaScriptQuickInfo7.ts b/tests/cases/fourslash/getJavaScriptQuickInfo7.ts
index 5aa8474757d..7b8d967d190 100644
--- a/tests/cases/fourslash/getJavaScriptQuickInfo7.ts
+++ b/tests/cases/fourslash/getJavaScriptQuickInfo7.ts
@@ -17,4 +17,6 @@
 //// x - /**/a1()
 
 goTo.marker();
-verify.quickInfoExists();
\ No newline at end of file
+verify.quickInfoExists();
+verify.quickInfoIs('function a1(p: any): number',
+                   'This is a very cool function that is very nice.\n@returns something');

From 6a243e3d1d9a9d474fd4dc4c223e7bde99663915 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 7 Jun 2016 17:37:03 -0700
Subject: [PATCH 198/332] Allow nested assignments in type guards

---
 src/compiler/checker.ts | 28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 650bc488b0e..3c512de4277 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7662,6 +7662,21 @@ namespace ts {
                 getInitialTypeOfBindingElement(<BindingElement>node);
         }
 
+        function getReferenceFromExpression(node: Expression): Expression {
+            switch (node.kind) {
+                case SyntaxKind.ParenthesizedExpression:
+                    return getReferenceFromExpression((<ParenthesizedExpression>node).expression);
+                case SyntaxKind.BinaryExpression:
+                    switch ((<BinaryExpression>node).operatorToken.kind) {
+                        case SyntaxKind.EqualsToken:
+                            return getReferenceFromExpression((<BinaryExpression>node).left);
+                        case SyntaxKind.CommaToken:
+                            return getReferenceFromExpression((<BinaryExpression>node).right);
+                    }
+            }
+            return node;
+        }
+
         function getFlowTypeOfReference(reference: Node, declaredType: Type, assumeInitialized: boolean, includeOuterFunctions: boolean) {
             let key: string;
             if (!reference.flowNode || assumeInitialized && !(declaredType.flags & TypeFlags.Narrowable)) {
@@ -7882,7 +7897,7 @@ namespace ts {
                 if (operator === SyntaxKind.ExclamationEqualsToken || operator === SyntaxKind.ExclamationEqualsEqualsToken) {
                     assumeTrue = !assumeTrue;
                 }
-                if (!strictNullChecks || !isMatchingReference(reference, expr.left)) {
+                if (!strictNullChecks || !isMatchingReference(reference, getReferenceFromExpression(expr.left))) {
                     return type;
                 }
                 const doubleEquals = operator === SyntaxKind.EqualsEqualsToken || operator === SyntaxKind.ExclamationEqualsToken;
@@ -7897,12 +7912,12 @@ namespace ts {
             function narrowTypeByTypeof(type: Type, expr: BinaryExpression, assumeTrue: boolean): Type {
                 // We have '==', '!=', '====', or !==' operator with 'typeof xxx' on the left
                 // and string literal on the right
-                const left = <TypeOfExpression>expr.left;
+                const left = getReferenceFromExpression((<TypeOfExpression>expr.left).expression);
                 const right = <LiteralExpression>expr.right;
-                if (!isMatchingReference(reference, left.expression)) {
+                if (!isMatchingReference(reference, left)) {
                     // For a reference of the form 'x.y', a 'typeof x === ...' type guard resets the
                     // narrowed type of 'y' to its declared type.
-                    if (containsMatchingReference(reference, left.expression)) {
+                    if (containsMatchingReference(reference, left)) {
                         return declaredType;
                     }
                     return type;
@@ -7927,10 +7942,11 @@ namespace ts {
             }
 
             function narrowTypeByInstanceof(type: Type, expr: BinaryExpression, assumeTrue: boolean): Type {
-                if (!isMatchingReference(reference, expr.left)) {
+                const left = getReferenceFromExpression(expr.left);
+                if (!isMatchingReference(reference, left)) {
                     // For a reference of the form 'x.y', an 'x instanceof T' type guard resets the
                     // narrowed type of 'y' to its declared type.
-                    if (containsMatchingReference(reference, expr.left)) {
+                    if (containsMatchingReference(reference, left)) {
                         return declaredType;
                     }
                     return type;

From cdf5b7aeb382be8ccc946a687be0c803c6ff89ab Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 7 Jun 2016 17:37:18 -0700
Subject: [PATCH 199/332] Add tests

---
 .../reference/typeGuardsNestedAssignments.js  |  86 ++++++++++
 .../typeGuardsNestedAssignments.symbols       | 113 +++++++++++++
 .../typeGuardsNestedAssignments.types         | 155 ++++++++++++++++++
 .../typeGuardsNestedAssignments.ts            |  47 ++++++
 4 files changed, 401 insertions(+)
 create mode 100644 tests/baselines/reference/typeGuardsNestedAssignments.js
 create mode 100644 tests/baselines/reference/typeGuardsNestedAssignments.symbols
 create mode 100644 tests/baselines/reference/typeGuardsNestedAssignments.types
 create mode 100644 tests/cases/conformance/controlFlow/typeGuardsNestedAssignments.ts

diff --git a/tests/baselines/reference/typeGuardsNestedAssignments.js b/tests/baselines/reference/typeGuardsNestedAssignments.js
new file mode 100644
index 00000000000..f37db041006
--- /dev/null
+++ b/tests/baselines/reference/typeGuardsNestedAssignments.js
@@ -0,0 +1,86 @@
+//// [typeGuardsNestedAssignments.ts]
+
+class Foo {
+    x: string;
+}
+
+declare function getFooOrNull(): Foo | null;
+declare function getStringOrNumberOrNull(): string | number | null;
+
+function f1() {
+    let foo: Foo | null;
+    if ((foo = getFooOrNull()) !== null) {
+        foo;  // Foo
+    }
+}
+
+function f2() {
+    let foo1: Foo | null;
+    let foo2: Foo | null;
+    if ((foo1 = getFooOrNull(), foo2 = foo1) !== null) {
+        foo1;  // Foo | null
+        foo2;  // Foo
+    }
+}
+
+function f3() {
+    let obj: Object | null;
+    if ((obj = getFooOrNull()) instanceof Foo) {
+        obj;
+    }
+}
+
+function f4() {
+    let x: string | number | null;
+    if (typeof (x = getStringOrNumberOrNull()) === "number") {
+        x;
+    }
+}
+
+// Repro from #8851
+
+const re = /./g
+let match: RegExpExecArray | null
+
+while ((match = re.exec("xxx")) != null) {
+    const length = match[1].length + match[2].length
+}
+
+//// [typeGuardsNestedAssignments.js]
+var Foo = (function () {
+    function Foo() {
+    }
+    return Foo;
+}());
+function f1() {
+    var foo;
+    if ((foo = getFooOrNull()) !== null) {
+        foo; // Foo
+    }
+}
+function f2() {
+    var foo1;
+    var foo2;
+    if ((foo1 = getFooOrNull(), foo2 = foo1) !== null) {
+        foo1; // Foo | null
+        foo2; // Foo
+    }
+}
+function f3() {
+    var obj;
+    if ((obj = getFooOrNull()) instanceof Foo) {
+        obj;
+    }
+}
+function f4() {
+    var x;
+    if (typeof (x = getStringOrNumberOrNull()) === "number") {
+        x;
+    }
+}
+// Repro from #8851
+var re = /./g;
+var match;
+while ((match = re.exec("xxx")) != null) {
+    var length = match[1].length + match[2].length;
+}
diff --git a/tests/baselines/reference/typeGuardsNestedAssignments.symbols b/tests/baselines/reference/typeGuardsNestedAssignments.symbols
new file mode 100644
index 00000000000..1cca9c7de73
--- /dev/null
+++ b/tests/baselines/reference/typeGuardsNestedAssignments.symbols
@@ -0,0 +1,113 @@
+=== tests/cases/conformance/controlFlow/typeGuardsNestedAssignments.ts ===
+
+class Foo {
+>Foo : Symbol(Foo, Decl(typeGuardsNestedAssignments.ts, 0, 0))
+
+    x: string;
+>x : Symbol(Foo.x, Decl(typeGuardsNestedAssignments.ts, 1, 11))
+}
+
+declare function getFooOrNull(): Foo | null;
+>getFooOrNull : Symbol(getFooOrNull, Decl(typeGuardsNestedAssignments.ts, 3, 1))
+>Foo : Symbol(Foo, Decl(typeGuardsNestedAssignments.ts, 0, 0))
+
+declare function getStringOrNumberOrNull(): string | number | null;
+>getStringOrNumberOrNull : Symbol(getStringOrNumberOrNull, Decl(typeGuardsNestedAssignments.ts, 5, 44))
+
+function f1() {
+>f1 : Symbol(f1, Decl(typeGuardsNestedAssignments.ts, 6, 67))
+
+    let foo: Foo | null;
+>foo : Symbol(foo, Decl(typeGuardsNestedAssignments.ts, 9, 7))
+>Foo : Symbol(Foo, Decl(typeGuardsNestedAssignments.ts, 0, 0))
+
+    if ((foo = getFooOrNull()) !== null) {
+>foo : Symbol(foo, Decl(typeGuardsNestedAssignments.ts, 9, 7))
+>getFooOrNull : Symbol(getFooOrNull, Decl(typeGuardsNestedAssignments.ts, 3, 1))
+
+        foo;  // Foo
+>foo : Symbol(foo, Decl(typeGuardsNestedAssignments.ts, 9, 7))
+    }
+}
+
+function f2() {
+>f2 : Symbol(f2, Decl(typeGuardsNestedAssignments.ts, 13, 1))
+
+    let foo1: Foo | null;
+>foo1 : Symbol(foo1, Decl(typeGuardsNestedAssignments.ts, 16, 7))
+>Foo : Symbol(Foo, Decl(typeGuardsNestedAssignments.ts, 0, 0))
+
+    let foo2: Foo | null;
+>foo2 : Symbol(foo2, Decl(typeGuardsNestedAssignments.ts, 17, 7))
+>Foo : Symbol(Foo, Decl(typeGuardsNestedAssignments.ts, 0, 0))
+
+    if ((foo1 = getFooOrNull(), foo2 = foo1) !== null) {
+>foo1 : Symbol(foo1, Decl(typeGuardsNestedAssignments.ts, 16, 7))
+>getFooOrNull : Symbol(getFooOrNull, Decl(typeGuardsNestedAssignments.ts, 3, 1))
+>foo2 : Symbol(foo2, Decl(typeGuardsNestedAssignments.ts, 17, 7))
+>foo1 : Symbol(foo1, Decl(typeGuardsNestedAssignments.ts, 16, 7))
+
+        foo1;  // Foo | null
+>foo1 : Symbol(foo1, Decl(typeGuardsNestedAssignments.ts, 16, 7))
+
+        foo2;  // Foo
+>foo2 : Symbol(foo2, Decl(typeGuardsNestedAssignments.ts, 17, 7))
+    }
+}
+
+function f3() {
+>f3 : Symbol(f3, Decl(typeGuardsNestedAssignments.ts, 22, 1))
+
+    let obj: Object | null;
+>obj : Symbol(obj, Decl(typeGuardsNestedAssignments.ts, 25, 7))
+>Object : Symbol(Object, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+
+    if ((obj = getFooOrNull()) instanceof Foo) {
+>obj : Symbol(obj, Decl(typeGuardsNestedAssignments.ts, 25, 7))
+>getFooOrNull : Symbol(getFooOrNull, Decl(typeGuardsNestedAssignments.ts, 3, 1))
+>Foo : Symbol(Foo, Decl(typeGuardsNestedAssignments.ts, 0, 0))
+
+        obj;
+>obj : Symbol(obj, Decl(typeGuardsNestedAssignments.ts, 25, 7))
+    }
+}
+
+function f4() {
+>f4 : Symbol(f4, Decl(typeGuardsNestedAssignments.ts, 29, 1))
+
+    let x: string | number | null;
+>x : Symbol(x, Decl(typeGuardsNestedAssignments.ts, 32, 7))
+
+    if (typeof (x = getStringOrNumberOrNull()) === "number") {
+>x : Symbol(x, Decl(typeGuardsNestedAssignments.ts, 32, 7))
+>getStringOrNumberOrNull : Symbol(getStringOrNumberOrNull, Decl(typeGuardsNestedAssignments.ts, 5, 44))
+
+        x;
+>x : Symbol(x, Decl(typeGuardsNestedAssignments.ts, 32, 7))
+    }
+}
+
+// Repro from #8851
+
+const re = /./g
+>re : Symbol(re, Decl(typeGuardsNestedAssignments.ts, 40, 5))
+
+let match: RegExpExecArray | null
+>match : Symbol(match, Decl(typeGuardsNestedAssignments.ts, 41, 3))
+>RegExpExecArray : Symbol(RegExpExecArray, Decl(lib.d.ts, --, --))
+
+while ((match = re.exec("xxx")) != null) {
+>match : Symbol(match, Decl(typeGuardsNestedAssignments.ts, 41, 3))
+>re.exec : Symbol(RegExp.exec, Decl(lib.d.ts, --, --))
+>re : Symbol(re, Decl(typeGuardsNestedAssignments.ts, 40, 5))
+>exec : Symbol(RegExp.exec, Decl(lib.d.ts, --, --))
+
+    const length = match[1].length + match[2].length
+>length : Symbol(length, Decl(typeGuardsNestedAssignments.ts, 44, 9))
+>match[1].length : Symbol(String.length, Decl(lib.d.ts, --, --))
+>match : Symbol(match, Decl(typeGuardsNestedAssignments.ts, 41, 3))
+>length : Symbol(String.length, Decl(lib.d.ts, --, --))
+>match[2].length : Symbol(String.length, Decl(lib.d.ts, --, --))
+>match : Symbol(match, Decl(typeGuardsNestedAssignments.ts, 41, 3))
+>length : Symbol(String.length, Decl(lib.d.ts, --, --))
+}
diff --git a/tests/baselines/reference/typeGuardsNestedAssignments.types b/tests/baselines/reference/typeGuardsNestedAssignments.types
new file mode 100644
index 00000000000..566a39a9c23
--- /dev/null
+++ b/tests/baselines/reference/typeGuardsNestedAssignments.types
@@ -0,0 +1,155 @@
+=== tests/cases/conformance/controlFlow/typeGuardsNestedAssignments.ts ===
+
+class Foo {
+>Foo : Foo
+
+    x: string;
+>x : string
+}
+
+declare function getFooOrNull(): Foo | null;
+>getFooOrNull : () => Foo | null
+>Foo : Foo
+>null : null
+
+declare function getStringOrNumberOrNull(): string | number | null;
+>getStringOrNumberOrNull : () => string | number | null
+>null : null
+
+function f1() {
+>f1 : () => void
+
+    let foo: Foo | null;
+>foo : Foo | null
+>Foo : Foo
+>null : null
+
+    if ((foo = getFooOrNull()) !== null) {
+>(foo = getFooOrNull()) !== null : boolean
+>(foo = getFooOrNull()) : Foo | null
+>foo = getFooOrNull() : Foo | null
+>foo : Foo | null
+>getFooOrNull() : Foo | null
+>getFooOrNull : () => Foo | null
+>null : null
+
+        foo;  // Foo
+>foo : Foo
+    }
+}
+
+function f2() {
+>f2 : () => void
+
+    let foo1: Foo | null;
+>foo1 : Foo | null
+>Foo : Foo
+>null : null
+
+    let foo2: Foo | null;
+>foo2 : Foo | null
+>Foo : Foo
+>null : null
+
+    if ((foo1 = getFooOrNull(), foo2 = foo1) !== null) {
+>(foo1 = getFooOrNull(), foo2 = foo1) !== null : boolean
+>(foo1 = getFooOrNull(), foo2 = foo1) : Foo | null
+>foo1 = getFooOrNull(), foo2 = foo1 : Foo | null
+>foo1 = getFooOrNull() : Foo | null
+>foo1 : Foo | null
+>getFooOrNull() : Foo | null
+>getFooOrNull : () => Foo | null
+>foo2 = foo1 : Foo | null
+>foo2 : Foo | null
+>foo1 : Foo | null
+>null : null
+
+        foo1;  // Foo | null
+>foo1 : Foo | null
+
+        foo2;  // Foo
+>foo2 : Foo
+    }
+}
+
+function f3() {
+>f3 : () => void
+
+    let obj: Object | null;
+>obj : Object | null
+>Object : Object
+>null : null
+
+    if ((obj = getFooOrNull()) instanceof Foo) {
+>(obj = getFooOrNull()) instanceof Foo : boolean
+>(obj = getFooOrNull()) : Foo | null
+>obj = getFooOrNull() : Foo | null
+>obj : Object | null
+>getFooOrNull() : Foo | null
+>getFooOrNull : () => Foo | null
+>Foo : typeof Foo
+
+        obj;
+>obj : Foo
+    }
+}
+
+function f4() {
+>f4 : () => void
+
+    let x: string | number | null;
+>x : string | number | null
+>null : null
+
+    if (typeof (x = getStringOrNumberOrNull()) === "number") {
+>typeof (x = getStringOrNumberOrNull()) === "number" : boolean
+>typeof (x = getStringOrNumberOrNull()) : string
+>(x = getStringOrNumberOrNull()) : string | number | null
+>x = getStringOrNumberOrNull() : string | number | null
+>x : string | number | null
+>getStringOrNumberOrNull() : string | number | null
+>getStringOrNumberOrNull : () => string | number | null
+>"number" : string
+
+        x;
+>x : number
+    }
+}
+
+// Repro from #8851
+
+const re = /./g
+>re : RegExp
+>/./g : RegExp
+
+let match: RegExpExecArray | null
+>match : RegExpExecArray | null
+>RegExpExecArray : RegExpExecArray
+>null : null
+
+while ((match = re.exec("xxx")) != null) {
+>(match = re.exec("xxx")) != null : boolean
+>(match = re.exec("xxx")) : RegExpExecArray | null
+>match = re.exec("xxx") : RegExpExecArray | null
+>match : RegExpExecArray | null
+>re.exec("xxx") : RegExpExecArray | null
+>re.exec : (string: string) => RegExpExecArray | null
+>re : RegExp
+>exec : (string: string) => RegExpExecArray | null
+>"xxx" : string
+>null : null
+
+    const length = match[1].length + match[2].length
+>length : number
+>match[1].length + match[2].length : number
+>match[1].length : number
+>match[1] : string
+>match : RegExpExecArray
+>1 : number
+>length : number
+>match[2].length : number
+>match[2] : string
+>match : RegExpExecArray
+>2 : number
+>length : number
+}
diff --git a/tests/cases/conformance/controlFlow/typeGuardsNestedAssignments.ts b/tests/cases/conformance/controlFlow/typeGuardsNestedAssignments.ts
new file mode 100644
index 00000000000..41e3ffe572e
--- /dev/null
+++ b/tests/cases/conformance/controlFlow/typeGuardsNestedAssignments.ts
@@ -0,0 +1,47 @@
+// @strictNullChecks: true
+
+class Foo {
+    x: string;
+}
+
+declare function getFooOrNull(): Foo | null;
+declare function getStringOrNumberOrNull(): string | number | null;
+
+function f1() {
+    let foo: Foo | null;
+    if ((foo = getFooOrNull()) !== null) {
+        foo;  // Foo
+    }
+}
+
+function f2() {
+    let foo1: Foo | null;
+    let foo2: Foo | null;
+    if ((foo1 = getFooOrNull(), foo2 = foo1) !== null) {
+        foo1;  // Foo | null
+        foo2;  // Foo
+    }
+}
+
+function f3() {
+    let obj: Object | null;
+    if ((obj = getFooOrNull()) instanceof Foo) {
+        obj;
+    }
+}
+
+function f4() {
+    let x: string | number | null;
+    if (typeof (x = getStringOrNumberOrNull()) === "number") {
+        x;
+    }
+}
+
+// Repro from #8851
+
+const re = /./g
+let match: RegExpExecArray | null
+
+while ((match = re.exec("xxx")) != null) {
+    const length = match[1].length + match[2].length
+}
\ No newline at end of file

From 6bf5f115b639b74e6700f8d042753a6e94a884f8 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Wed, 8 Jun 2016 08:42:38 -0700
Subject: [PATCH 200/332] Improve order of parameter's merged jsdoc

---
 tests/cases/fourslash/commentsFunction.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/cases/fourslash/commentsFunction.ts b/tests/cases/fourslash/commentsFunction.ts
index 34d9e463eb6..2dff7c357a6 100644
--- a/tests/cases/fourslash/commentsFunction.ts
+++ b/tests/cases/fourslash/commentsFunction.ts
@@ -153,5 +153,5 @@ goTo.marker('35');
 verify.completionListContains("assigned", "var assigned: (s: string) => number", "On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
 goTo.marker('36');
 verify.currentSignatureHelpDocCommentIs("On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
-verify.currentParameterHelpArgumentDocCommentIs("param on expression\nthe first parameter!\nOn parameter ");
+verify.currentParameterHelpArgumentDocCommentIs("the first parameter!\nparam on expression\nOn parameter ");
 

From 65bbeb1f8ce3c6a06865f58670082e6c8d7e4a68 Mon Sep 17 00:00:00 2001
From: Dick van den Brink <d_vandenbrink@outlook.com>
Date: Wed, 8 Jun 2016 19:33:03 +0200
Subject: [PATCH 201/332] Force LF newlines for LKG builds/non debug builds
 Fixes 6630

---
 Jakefile.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Jakefile.js b/Jakefile.js
index a449dfcfa98..d36d9a6857a 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -313,6 +313,8 @@ function compileFile(outFile, sources, prereqs, prefixes, useBuiltCompiler, opts
             if (!opts.noMapRoot) {
                 options += " -mapRoot file:///" + path.resolve(path.dirname(outFile));
             }
+        } else {
+            options += " --newLine LF";
         }
 
         if (opts.stripInternal) {

From 83971d0900b48a6c88c287b154a2c74bdc6409d0 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Wed, 8 Jun 2016 10:51:32 -0700
Subject: [PATCH 202/332] Create intersection types in type guards for
 unrelated types

---
 src/compiler/checker.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 650bc488b0e..ea494725fc6 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7997,7 +7997,7 @@ namespace ts {
                 const targetType = type.flags & TypeFlags.TypeParameter ? getApparentType(type) : type;
                 return isTypeAssignableTo(candidate, targetType) ? candidate :
                     isTypeAssignableTo(type, candidate) ? type :
-                    neverType;
+                    getIntersectionType([type, candidate]);
             }
 
             function narrowTypeByTypePredicate(type: Type, callExpression: CallExpression, assumeTrue: boolean): Type {

From 9832f62f48b0d6da4af72efc6ba10160b37e0442 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Wed, 8 Jun 2016 10:56:52 -0700
Subject: [PATCH 203/332] Split commentsFunction test into expr/decl

And renumber.
---
 tests/cases/fourslash/commentsFunction.ts     | 157 ------------------
 .../fourslash/commentsFunctionDeclaration.ts  |  61 +++++++
 .../fourslash/commentsFunctionExpression.ts   |  91 ++++++++++
 3 files changed, 152 insertions(+), 157 deletions(-)
 delete mode 100644 tests/cases/fourslash/commentsFunction.ts
 create mode 100644 tests/cases/fourslash/commentsFunctionDeclaration.ts
 create mode 100644 tests/cases/fourslash/commentsFunctionExpression.ts

diff --git a/tests/cases/fourslash/commentsFunction.ts b/tests/cases/fourslash/commentsFunction.ts
deleted file mode 100644
index 2dff7c357a6..00000000000
--- a/tests/cases/fourslash/commentsFunction.ts
+++ /dev/null
@@ -1,157 +0,0 @@
-/// <reference path='fourslash.ts' />
-
-/////** This comment should appear for foo*/
-////function f/*6*/oo() {
-////}
-////f/*7*/oo/*4*/(/*1*/);
-/////** This is comment for function signature*/
-////function fo/*8*/oWithParameters(/** this is comment about a*/a: string,
-////    /** this is comment for b*/
-////    b: number) {
-////    var /*20*/d = /*10*/a;
-////}
-////fooWithParam/*9*/eters/*5*/(/*2*/"a",/*3*/10);
-/////** lamdaFoo var comment*/
-////var lamb/*11*/daFoo = /** this is lambda comment*/ (/**param a*/a: number, /**param b*/b: number) => /*18*/a + b;
-////var lambddaN/*12*/oVarComment = /** this is lambda multiplication*/ (/**param a*/a: number, /**param b*/b: number) => a * b;
-/////*13*/lambdaFoo(/*14*/10, /*15*/20);
-////lambddaNoVarComment(/*16*/10, /*17*/20);
-/////**
-////* Does something
-////* @param a a string
-////*/
-////declare function fn(a: string);
-////fn(/*19*/"hello");
-////var lambdaA/*20a*/notherFunc = (/*21*/a: number) => {
-////    var bb/*22*/bb = 10;
-////    return /*24*/a + b/*23*/bbb;
-////}
-////function /*25*/anotherFunc(/*26*/a: number) {
-////    var /*27a*/lambdaVar = (/*27*/b: string) => {
-////        var /*28*/localVar = "Hello ";
-////        return /*29*/localVar + /*30*/b;
-////    }
-////    return lamb/*31*/daVar("World") + /*32*/a;
-////}
-/////**
-//// * On variable
-//// * @param s the first parameter!
-//// * @returns the parameter's length
-//// */
-////var assi/*33*/gned = /**
-////                * Summary on expression
-////                * @param s param on expression
-////                * @returns return on expression
-////                */function(/** On parameter */s: string) {
-////  return s.length;
-////}
-////assig/*34*/ned/*35*/(/*36*/"hey");
-
-
-goTo.marker('1');
-verify.currentSignatureHelpDocCommentIs("This comment should appear for foo");
-
-goTo.marker('2');
-verify.currentSignatureHelpDocCommentIs("This is comment for function signature");
-verify.currentParameterHelpArgumentDocCommentIs("this is comment about a");
-
-goTo.marker('3');
-verify.currentSignatureHelpDocCommentIs("This is comment for function signature");
-verify.currentParameterHelpArgumentDocCommentIs("this is comment for b");
-
-goTo.marker('4');
-verify.completionListContains('foo', 'function foo(): void', 'This comment should appear for foo');
-
-goTo.marker('5');
-verify.completionListContains('fooWithParameters', 'function fooWithParameters(a: string, b: number): void', 'This is comment for function signature');
-
-goTo.marker('6');
-verify.quickInfoIs("function foo(): void", "This comment should appear for foo");
-
-goTo.marker('7');
-verify.quickInfoIs("function foo(): void", "This comment should appear for foo");
-
-goTo.marker('8');
-verify.quickInfoIs("function fooWithParameters(a: string, b: number): void", "This is comment for function signature");
-
-goTo.marker('9');
-verify.quickInfoIs("function fooWithParameters(a: string, b: number): void", "This is comment for function signature");
-
-goTo.marker('10');
-verify.completionListContains('a', '(parameter) a: string', 'this is comment about a');
-verify.completionListContains('b', '(parameter) b: number', 'this is comment for b');
-
-goTo.marker('11');
-verify.quickInfoIs("var lambdaFoo: (a: number, b: number) => number", "lamdaFoo var comment\nthis is lambda comment");
-
-goTo.marker('12');
-// pick up doccomments from the lambda itself
-verify.quickInfoIs("var lambddaNoVarComment: (a: number, b: number) => number", "this is lambda multiplication");
-
-goTo.marker('13');
-verify.completionListContains('lambdaFoo', 'var lambdaFoo: (a: number, b: number) => number', 'lamdaFoo var comment\nthis is lambda comment');
-verify.completionListContains('lambddaNoVarComment', 'var lambddaNoVarComment: (a: number, b: number) => number', 'this is lambda multiplication');
-
-goTo.marker('14');
-verify.currentParameterHelpArgumentDocCommentIs("param a");
-
-goTo.marker('15');
-verify.currentParameterHelpArgumentDocCommentIs("param b");
-
-goTo.marker('16');
-verify.currentParameterHelpArgumentDocCommentIs("param a");
-
-goTo.marker('17');
-verify.currentParameterHelpArgumentDocCommentIs("param b");
-
-goTo.marker('18');
-verify.completionListContains('a', '(parameter) a: number', 'param a');
-verify.completionListContains('b', '(parameter) b: number', 'param b');
-
-goTo.marker('19');
-verify.currentSignatureHelpDocCommentIs("Does something");
-verify.currentParameterHelpArgumentDocCommentIs("a string");
-
-goTo.marker('20');
-verify.quickInfoIs('(local var) d: string', '');
-
-goTo.marker('20a');
-verify.quickInfoIs('var lambdaAnotherFunc: (a: number) => number', '');
-goTo.marker('21');
-verify.quickInfoIs('(parameter) a: number', '');
-goTo.marker('22');
-verify.quickInfoIs('(local var) bbbb: number', '');
-goTo.marker('23');
-verify.quickInfoIs('(local var) bbbb: number', '');
-goTo.marker('24');
-verify.quickInfoIs('(parameter) a: number', '');
-
-goTo.marker('25');
-verify.quickInfoIs('function anotherFunc(a: number): string', '');
-goTo.marker('26');
-verify.quickInfoIs('(parameter) a: number', '');
-goTo.marker('27a');
-verify.quickInfoIs('(local var) lambdaVar: (b: string) => string', '');
-goTo.marker('27');
-verify.quickInfoIs('(parameter) b: string', '');
-goTo.marker('28');
-verify.quickInfoIs('(local var) localVar: string', '');
-goTo.marker('29');
-verify.quickInfoIs('(local var) localVar: string', '');
-goTo.marker('30');
-verify.quickInfoIs('(parameter) b: string', '');
-goTo.marker('31');
-verify.quickInfoIs('(local var) lambdaVar: (b: string) => string', '');
-goTo.marker('32');
-verify.quickInfoIs('(parameter) a: number', '');
-
-goTo.marker('33');
-verify.quickInfoIs("var assigned: (s: string) => number", "On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
-goTo.marker('34');
-verify.quickInfoIs("var assigned: (s: string) => number", "On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
-goTo.marker('35');
-verify.completionListContains("assigned", "var assigned: (s: string) => number", "On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
-goTo.marker('36');
-verify.currentSignatureHelpDocCommentIs("On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
-verify.currentParameterHelpArgumentDocCommentIs("the first parameter!\nparam on expression\nOn parameter ");
-
diff --git a/tests/cases/fourslash/commentsFunctionDeclaration.ts b/tests/cases/fourslash/commentsFunctionDeclaration.ts
new file mode 100644
index 00000000000..892cbf90760
--- /dev/null
+++ b/tests/cases/fourslash/commentsFunctionDeclaration.ts
@@ -0,0 +1,61 @@
+/// <reference path='fourslash.ts' />
+
+/////** This comment should appear for foo*/
+////function f/*1*/oo() {
+////}
+////f/*2*/oo/*3*/(/*4*/);
+/////** This is comment for function signature*/
+////function fo/*5*/oWithParameters(/** this is comment about a*/a: string,
+////    /** this is comment for b*/
+////    b: number) {
+////    var /*6*/d = /*7*/a;
+////}
+////fooWithParam/*8*/eters/*9*/(/*10*/"a",/*11*/10);
+
+// ambient declaration
+/////**
+////* Does something
+////* @param a a string
+////*/
+////declare function fn(a: string);
+////fn(/*12*/"hello");
+
+goTo.marker('1');
+verify.quickInfoIs("function foo(): void", "This comment should appear for foo");
+
+goTo.marker('2');
+verify.quickInfoIs("function foo(): void", "This comment should appear for foo");
+
+goTo.marker('3');
+verify.completionListContains('foo', 'function foo(): void', 'This comment should appear for foo');
+
+goTo.marker('4');
+verify.currentSignatureHelpDocCommentIs("This comment should appear for foo");
+
+goTo.marker('5');
+verify.quickInfoIs("function fooWithParameters(a: string, b: number): void", "This is comment for function signature");
+
+goTo.marker('6');
+verify.quickInfoIs('(local var) d: string', '');
+
+goTo.marker('7');
+verify.completionListContains('a', '(parameter) a: string', 'this is comment about a');
+verify.completionListContains('b', '(parameter) b: number', 'this is comment for b');
+
+goTo.marker('8');
+verify.quickInfoIs("function fooWithParameters(a: string, b: number): void", "This is comment for function signature");
+
+goTo.marker('9');
+verify.completionListContains('fooWithParameters', 'function fooWithParameters(a: string, b: number): void', 'This is comment for function signature');
+
+goTo.marker('10');
+verify.currentSignatureHelpDocCommentIs("This is comment for function signature");
+verify.currentParameterHelpArgumentDocCommentIs("this is comment about a");
+
+goTo.marker('11');
+verify.currentSignatureHelpDocCommentIs("This is comment for function signature");
+verify.currentParameterHelpArgumentDocCommentIs("this is comment for b");
+
+goTo.marker('12');
+verify.currentSignatureHelpDocCommentIs("Does something");
+verify.currentParameterHelpArgumentDocCommentIs("a string");
diff --git a/tests/cases/fourslash/commentsFunctionExpression.ts b/tests/cases/fourslash/commentsFunctionExpression.ts
new file mode 100644
index 00000000000..ace3b07d455
--- /dev/null
+++ b/tests/cases/fourslash/commentsFunctionExpression.ts
@@ -0,0 +1,91 @@
+/// <reference path='fourslash.ts' />
+// TODO: Salsa test! With types!
+// TODO: Renumber!!!!
+// TODO:Remove some duplicate tests
+
+// test arrow doc comments
+/////** lamdaFoo var comment*/
+////var lamb/*1*/daFoo = /** this is lambda comment*/ (/**param a*/a: number, /**param b*/b: number) => /*2*/a + b;
+////var lambddaN/*3*/oVarComment = /** this is lambda multiplication*/ (/**param a*/a: number, /**param b*/b: number) => a * b;
+/////*4*/lambdaFoo(/*5*/10, /*6*/20);
+
+// test nested arrow doc comments
+////function /*7*/anotherFunc(a: number) {
+////    /** documentation
+////        @param b {string} inner parameter */
+////    var /*8*/lambdaVar = /** inner docs */(/*9*/b: string) => {
+////        var /*10*/localVar = "Hello ";
+////        return /*11*/localVar + /*12*/b;
+////    }
+////    return lamb/*13*/daVar("World") + a;
+////}
+
+// test function expression doc comments
+/////**
+//// * On variable
+//// * @param s the first parameter!
+//// * @returns the parameter's length
+//// */
+////var assi/*14*/gned = /**
+////                * Summary on expression
+////                * @param s param on expression
+////                * @returns return on expression
+////                */function(/** On parameter */s: string) {
+////  return /*15*/s.length;
+////}
+////assig/*16*/ned/*17*/(/*18*/"hey");
+
+
+
+goTo.marker('1');
+verify.quickInfoIs("var lambdaFoo: (a: number, b: number) => number", "lamdaFoo var comment\nthis is lambda comment");
+
+goTo.marker('2');
+verify.completionListContains('a', '(parameter) a: number', 'param a');
+verify.completionListContains('b', '(parameter) b: number', 'param b');
+
+goTo.marker('3');
+// pick up doccomments from the lambda itself
+verify.quickInfoIs("var lambddaNoVarComment: (a: number, b: number) => number", "this is lambda multiplication");
+
+goTo.marker('4');
+verify.completionListContains('lambdaFoo', 'var lambdaFoo: (a: number, b: number) => number', 'lamdaFoo var comment\nthis is lambda comment');
+verify.completionListContains('lambddaNoVarComment', 'var lambddaNoVarComment: (a: number, b: number) => number', 'this is lambda multiplication');
+
+goTo.marker('5');
+verify.currentParameterHelpArgumentDocCommentIs("param a");
+
+goTo.marker('6');
+verify.currentParameterHelpArgumentDocCommentIs("param b");
+
+
+
+
+goTo.marker('7');
+// no documentation from nested lambda
+verify.quickInfoIs('function anotherFunc(a: number): string', '');
+goTo.marker('8');
+verify.quickInfoIs('(local var) lambdaVar: (b: string) => string', 'documentation\ninner docs ');
+goTo.marker('9');
+verify.quickInfoIs('(parameter) b: string', '{string} inner parameter ');
+goTo.marker('10');
+verify.quickInfoIs('(local var) localVar: string', '');
+goTo.marker('11');
+verify.quickInfoIs('(local var) localVar: string', '');
+goTo.marker('12');
+verify.quickInfoIs('(parameter) b: string', '{string} inner parameter ');
+goTo.marker('13');
+verify.quickInfoIs('(local var) lambdaVar: (b: string) => string', 'documentation\ninner docs ');
+
+goTo.marker('14');
+verify.quickInfoIs("var assigned: (s: string) => number", "On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
+goTo.marker('15');
+verify.completionListContains('s', '(parameter) s: string', "the first parameter!\nparam on expression\nOn parameter ");
+goTo.marker('16');
+verify.quickInfoIs("var assigned: (s: string) => number", "On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
+goTo.marker('17');
+verify.completionListContains("assigned", "var assigned: (s: string) => number", "On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
+goTo.marker('18');
+verify.currentSignatureHelpDocCommentIs("On variable\n@returns the parameter's length\nSummary on expression\n@returns return on expression");
+verify.currentParameterHelpArgumentDocCommentIs("the first parameter!\nparam on expression\nOn parameter ");
+

From 1fe6626efa3d2bf6e2a0060d5560d07161489f0d Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Wed, 8 Jun 2016 11:07:42 -0700
Subject: [PATCH 204/332] Remove TODO comments

---
 tests/cases/fourslash/commentsFunctionExpression.ts | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/tests/cases/fourslash/commentsFunctionExpression.ts b/tests/cases/fourslash/commentsFunctionExpression.ts
index ace3b07d455..048efa3c9c1 100644
--- a/tests/cases/fourslash/commentsFunctionExpression.ts
+++ b/tests/cases/fourslash/commentsFunctionExpression.ts
@@ -1,7 +1,4 @@
 /// <reference path='fourslash.ts' />
-// TODO: Salsa test! With types!
-// TODO: Renumber!!!!
-// TODO:Remove some duplicate tests
 
 // test arrow doc comments
 /////** lamdaFoo var comment*/

From ea1bdff096cad9d21149f9f9713eb5e60e8949b5 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Wed, 8 Jun 2016 11:41:34 -0700
Subject: [PATCH 205/332] Accept new baselines

---
 .../reference/instanceOfAssignability.types   |  4 +--
 .../stringLiteralTypesAsTags01.types          |  4 +--
 .../stringLiteralTypesAsTags02.types          |  4 +--
 .../stringLiteralTypesAsTags03.types          |  4 +--
 .../typeGuardsWithInstanceOf.errors.txt       | 14 ---------
 .../typeGuardsWithInstanceOf.symbols          | 26 ++++++++++++++++
 .../reference/typeGuardsWithInstanceOf.types  | 31 +++++++++++++++++++
 7 files changed, 65 insertions(+), 22 deletions(-)
 delete mode 100644 tests/baselines/reference/typeGuardsWithInstanceOf.errors.txt
 create mode 100644 tests/baselines/reference/typeGuardsWithInstanceOf.symbols
 create mode 100644 tests/baselines/reference/typeGuardsWithInstanceOf.types

diff --git a/tests/baselines/reference/instanceOfAssignability.types b/tests/baselines/reference/instanceOfAssignability.types
index 70d068fb0cc..44ec45e2069 100644
--- a/tests/baselines/reference/instanceOfAssignability.types
+++ b/tests/baselines/reference/instanceOfAssignability.types
@@ -133,8 +133,8 @@ function fn5(x: Derived1) {
 		// 1.5: y: Derived1
 		// Want: ???
 		let y = x;
->y : never
->x : never
+>y : Derived1 & Derived2
+>x : Derived1 & Derived2
 	}
 }
 
diff --git a/tests/baselines/reference/stringLiteralTypesAsTags01.types b/tests/baselines/reference/stringLiteralTypesAsTags01.types
index 7b8ac0a8c02..64b099b34f2 100644
--- a/tests/baselines/reference/stringLiteralTypesAsTags01.types
+++ b/tests/baselines/reference/stringLiteralTypesAsTags01.types
@@ -116,6 +116,6 @@ if (!hasKind(x, "B")) {
 }
 else {
     let d = x;
->d : never
->x : never
+>d : A & B
+>x : A & B
 }
diff --git a/tests/baselines/reference/stringLiteralTypesAsTags02.types b/tests/baselines/reference/stringLiteralTypesAsTags02.types
index 290402cd299..92b294a2498 100644
--- a/tests/baselines/reference/stringLiteralTypesAsTags02.types
+++ b/tests/baselines/reference/stringLiteralTypesAsTags02.types
@@ -110,6 +110,6 @@ if (!hasKind(x, "B")) {
 }
 else {
     let d = x;
->d : never
->x : never
+>d : A & B
+>x : A & B
 }
diff --git a/tests/baselines/reference/stringLiteralTypesAsTags03.types b/tests/baselines/reference/stringLiteralTypesAsTags03.types
index 9d004982dda..49ae3da4be0 100644
--- a/tests/baselines/reference/stringLiteralTypesAsTags03.types
+++ b/tests/baselines/reference/stringLiteralTypesAsTags03.types
@@ -113,6 +113,6 @@ if (!hasKind(x, "B")) {
 }
 else {
     let d = x;
->d : never
->x : never
+>d : A & B
+>x : A & B
 }
diff --git a/tests/baselines/reference/typeGuardsWithInstanceOf.errors.txt b/tests/baselines/reference/typeGuardsWithInstanceOf.errors.txt
deleted file mode 100644
index dfcb8a598da..00000000000
--- a/tests/baselines/reference/typeGuardsWithInstanceOf.errors.txt
+++ /dev/null
@@ -1,14 +0,0 @@
-tests/cases/conformance/expressions/typeGuards/typeGuardsWithInstanceOf.ts(7,20): error TS2339: Property 'global' does not exist on type 'never'.
-
-
-==== tests/cases/conformance/expressions/typeGuards/typeGuardsWithInstanceOf.ts (1 errors) ====
-    interface I { global: string; }
-    var result: I;
-    var result2: I;
-    
-    if (!(result instanceof RegExp)) {
-        result = result2;
-    } else if (!result.global) {
-                       ~~~~~~
-!!! error TS2339: Property 'global' does not exist on type 'never'.
-    }
\ No newline at end of file
diff --git a/tests/baselines/reference/typeGuardsWithInstanceOf.symbols b/tests/baselines/reference/typeGuardsWithInstanceOf.symbols
new file mode 100644
index 00000000000..6d1667a6519
--- /dev/null
+++ b/tests/baselines/reference/typeGuardsWithInstanceOf.symbols
@@ -0,0 +1,26 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardsWithInstanceOf.ts ===
+interface I { global: string; }
+>I : Symbol(I, Decl(typeGuardsWithInstanceOf.ts, 0, 0))
+>global : Symbol(I.global, Decl(typeGuardsWithInstanceOf.ts, 0, 13))
+
+var result: I;
+>result : Symbol(result, Decl(typeGuardsWithInstanceOf.ts, 1, 3))
+>I : Symbol(I, Decl(typeGuardsWithInstanceOf.ts, 0, 0))
+
+var result2: I;
+>result2 : Symbol(result2, Decl(typeGuardsWithInstanceOf.ts, 2, 3))
+>I : Symbol(I, Decl(typeGuardsWithInstanceOf.ts, 0, 0))
+
+if (!(result instanceof RegExp)) {
+>result : Symbol(result, Decl(typeGuardsWithInstanceOf.ts, 1, 3))
+>RegExp : Symbol(RegExp, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+
+    result = result2;
+>result : Symbol(result, Decl(typeGuardsWithInstanceOf.ts, 1, 3))
+>result2 : Symbol(result2, Decl(typeGuardsWithInstanceOf.ts, 2, 3))
+
+} else if (!result.global) {
+>result.global : Symbol(global, Decl(typeGuardsWithInstanceOf.ts, 0, 13), Decl(lib.d.ts, --, --))
+>result : Symbol(result, Decl(typeGuardsWithInstanceOf.ts, 1, 3))
+>global : Symbol(global, Decl(typeGuardsWithInstanceOf.ts, 0, 13), Decl(lib.d.ts, --, --))
+}
diff --git a/tests/baselines/reference/typeGuardsWithInstanceOf.types b/tests/baselines/reference/typeGuardsWithInstanceOf.types
new file mode 100644
index 00000000000..f54498f93c8
--- /dev/null
+++ b/tests/baselines/reference/typeGuardsWithInstanceOf.types
@@ -0,0 +1,31 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardsWithInstanceOf.ts ===
+interface I { global: string; }
+>I : I
+>global : string
+
+var result: I;
+>result : I
+>I : I
+
+var result2: I;
+>result2 : I
+>I : I
+
+if (!(result instanceof RegExp)) {
+>!(result instanceof RegExp) : boolean
+>(result instanceof RegExp) : boolean
+>result instanceof RegExp : boolean
+>result : I
+>RegExp : RegExpConstructor
+
+    result = result2;
+>result = result2 : I
+>result : I
+>result2 : I
+
+} else if (!result.global) {
+>!result.global : boolean
+>result.global : string & boolean
+>result : I & RegExp
+>global : string & boolean
+}

From a57ee29ff7f9ddef02f12d4540928b11adc9333f Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Wed, 8 Jun 2016 11:41:44 -0700
Subject: [PATCH 206/332] Add tests

---
 .../reference/typeGuardIntersectionTypes.js   | 181 ++++++++++
 .../typeGuardIntersectionTypes.symbols        | 262 +++++++++++++++
 .../typeGuardIntersectionTypes.types          | 310 ++++++++++++++++++
 .../typeGuards/typeGuardIntersectionTypes.ts  | 115 +++++++
 4 files changed, 868 insertions(+)
 create mode 100644 tests/baselines/reference/typeGuardIntersectionTypes.js
 create mode 100644 tests/baselines/reference/typeGuardIntersectionTypes.symbols
 create mode 100644 tests/baselines/reference/typeGuardIntersectionTypes.types
 create mode 100644 tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts

diff --git a/tests/baselines/reference/typeGuardIntersectionTypes.js b/tests/baselines/reference/typeGuardIntersectionTypes.js
new file mode 100644
index 00000000000..16d35c43889
--- /dev/null
+++ b/tests/baselines/reference/typeGuardIntersectionTypes.js
@@ -0,0 +1,181 @@
+//// [typeGuardIntersectionTypes.ts]
+
+interface X {
+    x: string;
+}
+
+interface Y {
+    y: string;
+}
+
+interface Z {
+    z: string;
+}
+
+declare function isX(obj: any): obj is X;
+declare function isY(obj: any): obj is Y;
+declare function isZ(obj: any): obj is Z;
+
+function f1(obj: Object) {
+    if (isX(obj) || isY(obj) || isZ(obj)) {
+        obj;
+    }
+    if (isX(obj) && isY(obj) && isZ(obj)) {
+        obj;
+    }
+}
+
+// Repro from #8911
+
+// two interfaces
+interface A {
+  a: string;
+}
+
+interface B {
+  b: string;
+}
+
+// a type guard for B
+function isB(toTest: any): toTest is B {
+  return toTest && toTest.b;
+}
+
+// a function that turns an A into an A & B
+function union(a: A): A & B | null {
+  if (isB(a)) {
+    return a;
+  } else {
+    return null;
+  }
+}
+
+// Repro from #9011
+
+declare function log(s: string): void;
+
+// Supported beast features
+interface Beast     { wings?: boolean; legs?: number }
+interface Legged    { legs: number; }
+interface Winged    { wings: boolean; }
+
+// Beast feature detection via user-defined type guards
+function hasLegs(x: Beast): x is Legged { return x && typeof x.legs === 'number'; }
+function hasWings(x: Beast): x is Winged { return x && !!x.wings; }
+
+// Function to identify a given beast by detecting its features
+function identifyBeast(beast: Beast) {
+
+    // All beasts with legs
+    if (hasLegs(beast)) {
+
+        // All winged beasts with legs
+        if (hasWings(beast)) {
+            if (beast.legs === 4) { // ERROR TS2339: Property 'legs' does not exist on type 'Winged'.
+                log(`pegasus - 4 legs, wings`);
+            }
+            else if (beast.legs === 2) { // ERROR TS2339...
+                log(`bird - 2 legs, wings`);
+            }
+            else {
+                log(`unknown - ${beast.legs} legs, wings`); // ERROR TS2339...
+            }
+        }
+
+        // All non-winged beasts with legs
+        else {
+            log(`manbearpig - ${beast.legs} legs, no wings`);
+        }
+    }
+
+    // All beasts without legs    
+    else {
+        if (hasWings(beast)) {
+            log(`quetzalcoatl - no legs, wings`)
+        }
+        else {
+            log(`snake - no legs, no wings`)
+        }
+    }
+}
+
+function beastFoo(beast: Object) {
+    if (hasWings(beast) && hasLegs(beast)) {
+        beast // beast is Legged
+        // ideally, beast would be Winged && Legged here...
+    }
+    else {
+         beast
+    }
+
+    if (hasLegs(beast) && hasWings(beast)) {
+        beast // beast is Winged
+        // ideally, beast would be Legged && Winged here...
+    }
+}
+
+//// [typeGuardIntersectionTypes.js]
+function f1(obj) {
+    if (isX(obj) || isY(obj) || isZ(obj)) {
+        obj;
+    }
+    if (isX(obj) && isY(obj) && isZ(obj)) {
+        obj;
+    }
+}
+// a type guard for B
+function isB(toTest) {
+    return toTest && toTest.b;
+}
+// a function that turns an A into an A & B
+function union(a) {
+    if (isB(a)) {
+        return a;
+    }
+    else {
+        return null;
+    }
+}
+// Beast feature detection via user-defined type guards
+function hasLegs(x) { return x && typeof x.legs === 'number'; }
+function hasWings(x) { return x && !!x.wings; }
+// Function to identify a given beast by detecting its features
+function identifyBeast(beast) {
+    // All beasts with legs
+    if (hasLegs(beast)) {
+        // All winged beasts with legs
+        if (hasWings(beast)) {
+            if (beast.legs === 4) {
+                log("pegasus - 4 legs, wings");
+            }
+            else if (beast.legs === 2) {
+                log("bird - 2 legs, wings");
+            }
+            else {
+                log("unknown - " + beast.legs + " legs, wings"); // ERROR TS2339...
+            }
+        }
+        else {
+            log("manbearpig - " + beast.legs + " legs, no wings");
+        }
+    }
+    else {
+        if (hasWings(beast)) {
+            log("quetzalcoatl - no legs, wings");
+        }
+        else {
+            log("snake - no legs, no wings");
+        }
+    }
+}
+function beastFoo(beast) {
+    if (hasWings(beast) && hasLegs(beast)) {
+        beast; // beast is Legged
+    }
+    else {
+        beast;
+    }
+    if (hasLegs(beast) && hasWings(beast)) {
+        beast; // beast is Winged
+    }
+}
diff --git a/tests/baselines/reference/typeGuardIntersectionTypes.symbols b/tests/baselines/reference/typeGuardIntersectionTypes.symbols
new file mode 100644
index 00000000000..c59d972cd30
--- /dev/null
+++ b/tests/baselines/reference/typeGuardIntersectionTypes.symbols
@@ -0,0 +1,262 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts ===
+
+interface X {
+>X : Symbol(X, Decl(typeGuardIntersectionTypes.ts, 0, 0))
+
+    x: string;
+>x : Symbol(X.x, Decl(typeGuardIntersectionTypes.ts, 1, 13))
+}
+
+interface Y {
+>Y : Symbol(Y, Decl(typeGuardIntersectionTypes.ts, 3, 1))
+
+    y: string;
+>y : Symbol(Y.y, Decl(typeGuardIntersectionTypes.ts, 5, 13))
+}
+
+interface Z {
+>Z : Symbol(Z, Decl(typeGuardIntersectionTypes.ts, 7, 1))
+
+    z: string;
+>z : Symbol(Z.z, Decl(typeGuardIntersectionTypes.ts, 9, 13))
+}
+
+declare function isX(obj: any): obj is X;
+>isX : Symbol(isX, Decl(typeGuardIntersectionTypes.ts, 11, 1))
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 13, 21))
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 13, 21))
+>X : Symbol(X, Decl(typeGuardIntersectionTypes.ts, 0, 0))
+
+declare function isY(obj: any): obj is Y;
+>isY : Symbol(isY, Decl(typeGuardIntersectionTypes.ts, 13, 41))
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 14, 21))
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 14, 21))
+>Y : Symbol(Y, Decl(typeGuardIntersectionTypes.ts, 3, 1))
+
+declare function isZ(obj: any): obj is Z;
+>isZ : Symbol(isZ, Decl(typeGuardIntersectionTypes.ts, 14, 41))
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 15, 21))
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 15, 21))
+>Z : Symbol(Z, Decl(typeGuardIntersectionTypes.ts, 7, 1))
+
+function f1(obj: Object) {
+>f1 : Symbol(f1, Decl(typeGuardIntersectionTypes.ts, 15, 41))
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 17, 12))
+>Object : Symbol(Object, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+
+    if (isX(obj) || isY(obj) || isZ(obj)) {
+>isX : Symbol(isX, Decl(typeGuardIntersectionTypes.ts, 11, 1))
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 17, 12))
+>isY : Symbol(isY, Decl(typeGuardIntersectionTypes.ts, 13, 41))
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 17, 12))
+>isZ : Symbol(isZ, Decl(typeGuardIntersectionTypes.ts, 14, 41))
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 17, 12))
+
+        obj;
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 17, 12))
+    }
+    if (isX(obj) && isY(obj) && isZ(obj)) {
+>isX : Symbol(isX, Decl(typeGuardIntersectionTypes.ts, 11, 1))
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 17, 12))
+>isY : Symbol(isY, Decl(typeGuardIntersectionTypes.ts, 13, 41))
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 17, 12))
+>isZ : Symbol(isZ, Decl(typeGuardIntersectionTypes.ts, 14, 41))
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 17, 12))
+
+        obj;
+>obj : Symbol(obj, Decl(typeGuardIntersectionTypes.ts, 17, 12))
+    }
+}
+
+// Repro from #8911
+
+// two interfaces
+interface A {
+>A : Symbol(A, Decl(typeGuardIntersectionTypes.ts, 24, 1))
+
+  a: string;
+>a : Symbol(A.a, Decl(typeGuardIntersectionTypes.ts, 29, 13))
+}
+
+interface B {
+>B : Symbol(B, Decl(typeGuardIntersectionTypes.ts, 31, 1))
+
+  b: string;
+>b : Symbol(B.b, Decl(typeGuardIntersectionTypes.ts, 33, 13))
+}
+
+// a type guard for B
+function isB(toTest: any): toTest is B {
+>isB : Symbol(isB, Decl(typeGuardIntersectionTypes.ts, 35, 1))
+>toTest : Symbol(toTest, Decl(typeGuardIntersectionTypes.ts, 38, 13))
+>toTest : Symbol(toTest, Decl(typeGuardIntersectionTypes.ts, 38, 13))
+>B : Symbol(B, Decl(typeGuardIntersectionTypes.ts, 31, 1))
+
+  return toTest && toTest.b;
+>toTest : Symbol(toTest, Decl(typeGuardIntersectionTypes.ts, 38, 13))
+>toTest : Symbol(toTest, Decl(typeGuardIntersectionTypes.ts, 38, 13))
+}
+
+// a function that turns an A into an A & B
+function union(a: A): A & B | null {
+>union : Symbol(union, Decl(typeGuardIntersectionTypes.ts, 40, 1))
+>a : Symbol(a, Decl(typeGuardIntersectionTypes.ts, 43, 15))
+>A : Symbol(A, Decl(typeGuardIntersectionTypes.ts, 24, 1))
+>A : Symbol(A, Decl(typeGuardIntersectionTypes.ts, 24, 1))
+>B : Symbol(B, Decl(typeGuardIntersectionTypes.ts, 31, 1))
+
+  if (isB(a)) {
+>isB : Symbol(isB, Decl(typeGuardIntersectionTypes.ts, 35, 1))
+>a : Symbol(a, Decl(typeGuardIntersectionTypes.ts, 43, 15))
+
+    return a;
+>a : Symbol(a, Decl(typeGuardIntersectionTypes.ts, 43, 15))
+
+  } else {
+    return null;
+  }
+}
+
+// Repro from #9011
+
+declare function log(s: string): void;
+>log : Symbol(log, Decl(typeGuardIntersectionTypes.ts, 49, 1))
+>s : Symbol(s, Decl(typeGuardIntersectionTypes.ts, 53, 21))
+
+// Supported beast features
+interface Beast     { wings?: boolean; legs?: number }
+>Beast : Symbol(Beast, Decl(typeGuardIntersectionTypes.ts, 53, 38))
+>wings : Symbol(Beast.wings, Decl(typeGuardIntersectionTypes.ts, 56, 21))
+>legs : Symbol(Beast.legs, Decl(typeGuardIntersectionTypes.ts, 56, 38))
+
+interface Legged    { legs: number; }
+>Legged : Symbol(Legged, Decl(typeGuardIntersectionTypes.ts, 56, 54))
+>legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
+
+interface Winged    { wings: boolean; }
+>Winged : Symbol(Winged, Decl(typeGuardIntersectionTypes.ts, 57, 37))
+>wings : Symbol(Winged.wings, Decl(typeGuardIntersectionTypes.ts, 58, 21))
+
+// Beast feature detection via user-defined type guards
+function hasLegs(x: Beast): x is Legged { return x && typeof x.legs === 'number'; }
+>hasLegs : Symbol(hasLegs, Decl(typeGuardIntersectionTypes.ts, 58, 39))
+>x : Symbol(x, Decl(typeGuardIntersectionTypes.ts, 61, 17))
+>Beast : Symbol(Beast, Decl(typeGuardIntersectionTypes.ts, 53, 38))
+>x : Symbol(x, Decl(typeGuardIntersectionTypes.ts, 61, 17))
+>Legged : Symbol(Legged, Decl(typeGuardIntersectionTypes.ts, 56, 54))
+>x : Symbol(x, Decl(typeGuardIntersectionTypes.ts, 61, 17))
+>x.legs : Symbol(Beast.legs, Decl(typeGuardIntersectionTypes.ts, 56, 38))
+>x : Symbol(x, Decl(typeGuardIntersectionTypes.ts, 61, 17))
+>legs : Symbol(Beast.legs, Decl(typeGuardIntersectionTypes.ts, 56, 38))
+
+function hasWings(x: Beast): x is Winged { return x && !!x.wings; }
+>hasWings : Symbol(hasWings, Decl(typeGuardIntersectionTypes.ts, 61, 83))
+>x : Symbol(x, Decl(typeGuardIntersectionTypes.ts, 62, 18))
+>Beast : Symbol(Beast, Decl(typeGuardIntersectionTypes.ts, 53, 38))
+>x : Symbol(x, Decl(typeGuardIntersectionTypes.ts, 62, 18))
+>Winged : Symbol(Winged, Decl(typeGuardIntersectionTypes.ts, 57, 37))
+>x : Symbol(x, Decl(typeGuardIntersectionTypes.ts, 62, 18))
+>x.wings : Symbol(Beast.wings, Decl(typeGuardIntersectionTypes.ts, 56, 21))
+>x : Symbol(x, Decl(typeGuardIntersectionTypes.ts, 62, 18))
+>wings : Symbol(Beast.wings, Decl(typeGuardIntersectionTypes.ts, 56, 21))
+
+// Function to identify a given beast by detecting its features
+function identifyBeast(beast: Beast) {
+>identifyBeast : Symbol(identifyBeast, Decl(typeGuardIntersectionTypes.ts, 62, 67))
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 65, 23))
+>Beast : Symbol(Beast, Decl(typeGuardIntersectionTypes.ts, 53, 38))
+
+    // All beasts with legs
+    if (hasLegs(beast)) {
+>hasLegs : Symbol(hasLegs, Decl(typeGuardIntersectionTypes.ts, 58, 39))
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 65, 23))
+
+        // All winged beasts with legs
+        if (hasWings(beast)) {
+>hasWings : Symbol(hasWings, Decl(typeGuardIntersectionTypes.ts, 61, 83))
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 65, 23))
+
+            if (beast.legs === 4) { // ERROR TS2339: Property 'legs' does not exist on type 'Winged'.
+>beast.legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 65, 23))
+>legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
+
+                log(`pegasus - 4 legs, wings`);
+>log : Symbol(log, Decl(typeGuardIntersectionTypes.ts, 49, 1))
+            }
+            else if (beast.legs === 2) { // ERROR TS2339...
+>beast.legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 65, 23))
+>legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
+
+                log(`bird - 2 legs, wings`);
+>log : Symbol(log, Decl(typeGuardIntersectionTypes.ts, 49, 1))
+            }
+            else {
+                log(`unknown - ${beast.legs} legs, wings`); // ERROR TS2339...
+>log : Symbol(log, Decl(typeGuardIntersectionTypes.ts, 49, 1))
+>beast.legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 65, 23))
+>legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
+            }
+        }
+
+        // All non-winged beasts with legs
+        else {
+            log(`manbearpig - ${beast.legs} legs, no wings`);
+>log : Symbol(log, Decl(typeGuardIntersectionTypes.ts, 49, 1))
+>beast.legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 65, 23))
+>legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
+        }
+    }
+
+    // All beasts without legs    
+    else {
+        if (hasWings(beast)) {
+>hasWings : Symbol(hasWings, Decl(typeGuardIntersectionTypes.ts, 61, 83))
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 65, 23))
+
+            log(`quetzalcoatl - no legs, wings`)
+>log : Symbol(log, Decl(typeGuardIntersectionTypes.ts, 49, 1))
+        }
+        else {
+            log(`snake - no legs, no wings`)
+>log : Symbol(log, Decl(typeGuardIntersectionTypes.ts, 49, 1))
+        }
+    }
+}
+
+function beastFoo(beast: Object) {
+>beastFoo : Symbol(beastFoo, Decl(typeGuardIntersectionTypes.ts, 98, 1))
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 100, 18))
+>Object : Symbol(Object, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+
+    if (hasWings(beast) && hasLegs(beast)) {
+>hasWings : Symbol(hasWings, Decl(typeGuardIntersectionTypes.ts, 61, 83))
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 100, 18))
+>hasLegs : Symbol(hasLegs, Decl(typeGuardIntersectionTypes.ts, 58, 39))
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 100, 18))
+
+        beast // beast is Legged
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 100, 18))
+
+        // ideally, beast would be Winged && Legged here...
+    }
+    else {
+         beast
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 100, 18))
+    }
+
+    if (hasLegs(beast) && hasWings(beast)) {
+>hasLegs : Symbol(hasLegs, Decl(typeGuardIntersectionTypes.ts, 58, 39))
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 100, 18))
+>hasWings : Symbol(hasWings, Decl(typeGuardIntersectionTypes.ts, 61, 83))
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 100, 18))
+
+        beast // beast is Winged
+>beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 100, 18))
+
+        // ideally, beast would be Legged && Winged here...
+    }
+}
diff --git a/tests/baselines/reference/typeGuardIntersectionTypes.types b/tests/baselines/reference/typeGuardIntersectionTypes.types
new file mode 100644
index 00000000000..4018036c5ce
--- /dev/null
+++ b/tests/baselines/reference/typeGuardIntersectionTypes.types
@@ -0,0 +1,310 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts ===
+
+interface X {
+>X : X
+
+    x: string;
+>x : string
+}
+
+interface Y {
+>Y : Y
+
+    y: string;
+>y : string
+}
+
+interface Z {
+>Z : Z
+
+    z: string;
+>z : string
+}
+
+declare function isX(obj: any): obj is X;
+>isX : (obj: any) => obj is X
+>obj : any
+>obj : any
+>X : X
+
+declare function isY(obj: any): obj is Y;
+>isY : (obj: any) => obj is Y
+>obj : any
+>obj : any
+>Y : Y
+
+declare function isZ(obj: any): obj is Z;
+>isZ : (obj: any) => obj is Z
+>obj : any
+>obj : any
+>Z : Z
+
+function f1(obj: Object) {
+>f1 : (obj: Object) => void
+>obj : Object
+>Object : Object
+
+    if (isX(obj) || isY(obj) || isZ(obj)) {
+>isX(obj) || isY(obj) || isZ(obj) : boolean
+>isX(obj) || isY(obj) : boolean
+>isX(obj) : boolean
+>isX : (obj: any) => obj is X
+>obj : Object
+>isY(obj) : boolean
+>isY : (obj: any) => obj is Y
+>obj : Object
+>isZ(obj) : boolean
+>isZ : (obj: any) => obj is Z
+>obj : Object
+
+        obj;
+>obj : X | Y | Z
+    }
+    if (isX(obj) && isY(obj) && isZ(obj)) {
+>isX(obj) && isY(obj) && isZ(obj) : boolean
+>isX(obj) && isY(obj) : boolean
+>isX(obj) : boolean
+>isX : (obj: any) => obj is X
+>obj : Object
+>isY(obj) : boolean
+>isY : (obj: any) => obj is Y
+>obj : X
+>isZ(obj) : boolean
+>isZ : (obj: any) => obj is Z
+>obj : X & Y
+
+        obj;
+>obj : X & Y & Z
+    }
+}
+
+// Repro from #8911
+
+// two interfaces
+interface A {
+>A : A
+
+  a: string;
+>a : string
+}
+
+interface B {
+>B : B
+
+  b: string;
+>b : string
+}
+
+// a type guard for B
+function isB(toTest: any): toTest is B {
+>isB : (toTest: any) => toTest is B
+>toTest : any
+>toTest : any
+>B : B
+
+  return toTest && toTest.b;
+>toTest && toTest.b : any
+>toTest : any
+>toTest.b : any
+>toTest : any
+>b : any
+}
+
+// a function that turns an A into an A & B
+function union(a: A): A & B | null {
+>union : (a: A) => (A & B) | null
+>a : A
+>A : A
+>A : A
+>B : B
+>null : null
+
+  if (isB(a)) {
+>isB(a) : boolean
+>isB : (toTest: any) => toTest is B
+>a : A
+
+    return a;
+>a : A & B
+
+  } else {
+    return null;
+>null : null
+  }
+}
+
+// Repro from #9011
+
+declare function log(s: string): void;
+>log : (s: string) => void
+>s : string
+
+// Supported beast features
+interface Beast     { wings?: boolean; legs?: number }
+>Beast : Beast
+>wings : boolean | undefined
+>legs : number | undefined
+
+interface Legged    { legs: number; }
+>Legged : Legged
+>legs : number
+
+interface Winged    { wings: boolean; }
+>Winged : Winged
+>wings : boolean
+
+// Beast feature detection via user-defined type guards
+function hasLegs(x: Beast): x is Legged { return x && typeof x.legs === 'number'; }
+>hasLegs : (x: Beast) => x is Legged
+>x : Beast
+>Beast : Beast
+>x : any
+>Legged : Legged
+>x && typeof x.legs === 'number' : boolean
+>x : Beast
+>typeof x.legs === 'number' : boolean
+>typeof x.legs : string
+>x.legs : number | undefined
+>x : Beast
+>legs : number | undefined
+>'number' : string
+
+function hasWings(x: Beast): x is Winged { return x && !!x.wings; }
+>hasWings : (x: Beast) => x is Winged
+>x : Beast
+>Beast : Beast
+>x : any
+>Winged : Winged
+>x && !!x.wings : boolean
+>x : Beast
+>!!x.wings : boolean
+>!x.wings : boolean
+>x.wings : boolean | undefined
+>x : Beast
+>wings : boolean | undefined
+
+// Function to identify a given beast by detecting its features
+function identifyBeast(beast: Beast) {
+>identifyBeast : (beast: Beast) => void
+>beast : Beast
+>Beast : Beast
+
+    // All beasts with legs
+    if (hasLegs(beast)) {
+>hasLegs(beast) : boolean
+>hasLegs : (x: Beast) => x is Legged
+>beast : Beast
+
+        // All winged beasts with legs
+        if (hasWings(beast)) {
+>hasWings(beast) : boolean
+>hasWings : (x: Beast) => x is Winged
+>beast : Legged
+
+            if (beast.legs === 4) { // ERROR TS2339: Property 'legs' does not exist on type 'Winged'.
+>beast.legs === 4 : boolean
+>beast.legs : number
+>beast : Legged & Winged
+>legs : number
+>4 : number
+
+                log(`pegasus - 4 legs, wings`);
+>log(`pegasus - 4 legs, wings`) : void
+>log : (s: string) => void
+>`pegasus - 4 legs, wings` : string
+            }
+            else if (beast.legs === 2) { // ERROR TS2339...
+>beast.legs === 2 : boolean
+>beast.legs : number
+>beast : Legged & Winged
+>legs : number
+>2 : number
+
+                log(`bird - 2 legs, wings`);
+>log(`bird - 2 legs, wings`) : void
+>log : (s: string) => void
+>`bird - 2 legs, wings` : string
+            }
+            else {
+                log(`unknown - ${beast.legs} legs, wings`); // ERROR TS2339...
+>log(`unknown - ${beast.legs} legs, wings`) : void
+>log : (s: string) => void
+>`unknown - ${beast.legs} legs, wings` : string
+>beast.legs : number
+>beast : Legged & Winged
+>legs : number
+            }
+        }
+
+        // All non-winged beasts with legs
+        else {
+            log(`manbearpig - ${beast.legs} legs, no wings`);
+>log(`manbearpig - ${beast.legs} legs, no wings`) : void
+>log : (s: string) => void
+>`manbearpig - ${beast.legs} legs, no wings` : string
+>beast.legs : number
+>beast : Legged
+>legs : number
+        }
+    }
+
+    // All beasts without legs    
+    else {
+        if (hasWings(beast)) {
+>hasWings(beast) : boolean
+>hasWings : (x: Beast) => x is Winged
+>beast : Beast
+
+            log(`quetzalcoatl - no legs, wings`)
+>log(`quetzalcoatl - no legs, wings`) : void
+>log : (s: string) => void
+>`quetzalcoatl - no legs, wings` : string
+        }
+        else {
+            log(`snake - no legs, no wings`)
+>log(`snake - no legs, no wings`) : void
+>log : (s: string) => void
+>`snake - no legs, no wings` : string
+        }
+    }
+}
+
+function beastFoo(beast: Object) {
+>beastFoo : (beast: Object) => void
+>beast : Object
+>Object : Object
+
+    if (hasWings(beast) && hasLegs(beast)) {
+>hasWings(beast) && hasLegs(beast) : boolean
+>hasWings(beast) : boolean
+>hasWings : (x: Beast) => x is Winged
+>beast : Object
+>hasLegs(beast) : boolean
+>hasLegs : (x: Beast) => x is Legged
+>beast : Winged
+
+        beast // beast is Legged
+>beast : Winged & Legged
+
+        // ideally, beast would be Winged && Legged here...
+    }
+    else {
+         beast
+>beast : Object
+    }
+
+    if (hasLegs(beast) && hasWings(beast)) {
+>hasLegs(beast) && hasWings(beast) : boolean
+>hasLegs(beast) : boolean
+>hasLegs : (x: Beast) => x is Legged
+>beast : Object
+>hasWings(beast) : boolean
+>hasWings : (x: Beast) => x is Winged
+>beast : Legged
+
+        beast // beast is Winged
+>beast : Legged & Winged
+
+        // ideally, beast would be Legged && Winged here...
+    }
+}
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts
new file mode 100644
index 00000000000..efde587e5e5
--- /dev/null
+++ b/tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts
@@ -0,0 +1,115 @@
+// @strictNullChecks: true
+
+interface X {
+    x: string;
+}
+
+interface Y {
+    y: string;
+}
+
+interface Z {
+    z: string;
+}
+
+declare function isX(obj: any): obj is X;
+declare function isY(obj: any): obj is Y;
+declare function isZ(obj: any): obj is Z;
+
+function f1(obj: Object) {
+    if (isX(obj) || isY(obj) || isZ(obj)) {
+        obj;
+    }
+    if (isX(obj) && isY(obj) && isZ(obj)) {
+        obj;
+    }
+}
+
+// Repro from #8911
+
+// two interfaces
+interface A {
+  a: string;
+}
+
+interface B {
+  b: string;
+}
+
+// a type guard for B
+function isB(toTest: any): toTest is B {
+  return toTest && toTest.b;
+}
+
+// a function that turns an A into an A & B
+function union(a: A): A & B | null {
+  if (isB(a)) {
+    return a;
+  } else {
+    return null;
+  }
+}
+
+// Repro from #9011
+
+declare function log(s: string): void;
+
+// Supported beast features
+interface Beast     { wings?: boolean; legs?: number }
+interface Legged    { legs: number; }
+interface Winged    { wings: boolean; }
+
+// Beast feature detection via user-defined type guards
+function hasLegs(x: Beast): x is Legged { return x && typeof x.legs === 'number'; }
+function hasWings(x: Beast): x is Winged { return x && !!x.wings; }
+
+// Function to identify a given beast by detecting its features
+function identifyBeast(beast: Beast) {
+
+    // All beasts with legs
+    if (hasLegs(beast)) {
+
+        // All winged beasts with legs
+        if (hasWings(beast)) {
+            if (beast.legs === 4) { // ERROR TS2339: Property 'legs' does not exist on type 'Winged'.
+                log(`pegasus - 4 legs, wings`);
+            }
+            else if (beast.legs === 2) { // ERROR TS2339...
+                log(`bird - 2 legs, wings`);
+            }
+            else {
+                log(`unknown - ${beast.legs} legs, wings`); // ERROR TS2339...
+            }
+        }
+
+        // All non-winged beasts with legs
+        else {
+            log(`manbearpig - ${beast.legs} legs, no wings`);
+        }
+    }
+
+    // All beasts without legs    
+    else {
+        if (hasWings(beast)) {
+            log(`quetzalcoatl - no legs, wings`)
+        }
+        else {
+            log(`snake - no legs, no wings`)
+        }
+    }
+}
+
+function beastFoo(beast: Object) {
+    if (hasWings(beast) && hasLegs(beast)) {
+        beast // beast is Legged
+        // ideally, beast would be Winged && Legged here...
+    }
+    else {
+         beast
+    }
+
+    if (hasLegs(beast) && hasWings(beast)) {
+        beast // beast is Winged
+        // ideally, beast would be Legged && Winged here...
+    }
+}
\ No newline at end of file

From 7eb5f4b17959b38978f2b70a8c8c5d43c0de8b7a Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Wed, 8 Jun 2016 12:49:50 -0700
Subject: [PATCH 207/332] Remove comments

---
 src/compiler/types.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index c956f5d8249..b5d8ee6db16 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2490,7 +2490,7 @@ namespace ts {
         allowUnusedLabels?: boolean;
         baseUrl?: string;
         charset?: string;
-        /* @internal */ configFilePath?: string;           // When options come from a config file, its path is recorded here
+        /* @internal */ configFilePath?: string;
         declaration?: boolean;
         declarationDir?: string;
         /* @internal */ diagnostics?: boolean;
@@ -2542,12 +2542,12 @@ namespace ts {
         /* @internal */ stripInternal?: boolean;
         suppressExcessPropertyErrors?: boolean;
         suppressImplicitAnyIndexErrors?: boolean;
-        /* @internal */ suppressOutputPathCheck?: boolean;         // Do not perform validation of output file name in transpile scenarios
+        /* @internal */ suppressOutputPathCheck?: boolean;
         target?: ScriptTarget;
         traceResolution?: boolean;
         types?: string[];
         /* @internal */ typesRoot?: string;
-        typesSearchPaths?: string[];             // Path used to used to compute primary search locations
+        typesSearchPaths?: string[];
         /*@internal*/ version?: boolean;
         /*@internal*/ watch?: boolean;
 

From d8667ae323791902006b03440a59bf8ae4a5d7c4 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 8 Jun 2016 13:14:22 -0700
Subject: [PATCH 208/332] Fix test helper

---
 tests/cases/unittests/transpile.ts | 10 +++++++---
 1 file changed, 7 insertions(+), 3 deletions(-)

diff --git a/tests/cases/unittests/transpile.ts b/tests/cases/unittests/transpile.ts
index e694f943e1a..8231f3c9745 100644
--- a/tests/cases/unittests/transpile.ts
+++ b/tests/cases/unittests/transpile.ts
@@ -10,12 +10,16 @@ namespace ts {
             expectedDiagnosticTexts?: string[];
         }
 
-        function checkDiagnostics(diagnostics: Diagnostic[], expectedDiagnosticCodes: number[] = [], expectedDiagnosticTexts: string[] = []) {
+        function checkDiagnostics(diagnostics: Diagnostic[], expectedDiagnosticCodes: number[] = [], expectedDiagnosticTexts?: string[]) {
             const n = expectedDiagnosticCodes.length;
-            assert.equal(n, expectedDiagnosticTexts.length);
+            if (expectedDiagnosticTexts) {
+                assert.equal(n, expectedDiagnosticTexts.length);
+            }
             for (let i = 0; i < n; i++) {
                 assert.equal(expectedDiagnosticCodes[i], diagnostics[i] && diagnostics[i].code, `Could not find expected diagnostic.`);
-                assert.equal(expectedDiagnosticTexts[i], diagnostics[i] && diagnostics[i].messageText);
+                if (expectedDiagnosticTexts) {
+                    assert.equal(expectedDiagnosticTexts[i], diagnostics[i] && diagnostics[i].messageText);
+                }
             }
             assert.equal(diagnostics.length, n, "Resuting diagnostics count does not match expected");
         }

From 899f667544945a728e8d532b804d96574b2db192 Mon Sep 17 00:00:00 2001
From: Yui <yuit@users.noreply.github.com>
Date: Wed, 8 Jun 2016 13:20:47 -0700
Subject: [PATCH 209/332] Recognize relative path using in outDir property
 (#9025)

* Recognize relative path using in outDir property

* Add projects tests

* Add project .json files

* Update baselines
---
 .gitignore                                         |  2 +-
 src/compiler/commandLineParser.ts                  |  2 +-
 .../amd/OutDir/a.d.ts                              |  1 +
 .../amd/OutDir/a.js                                |  1 +
 .../amd/defaultExcludeNodeModulesAndOutDir.json    | 14 ++++++++++++++
 .../node/OutDir/a.d.ts                             |  1 +
 .../node/OutDir/a.js                               |  1 +
 .../node/defaultExcludeNodeModulesAndOutDir.json   | 14 ++++++++++++++
 .../amd/OutDir/a.js                                |  1 +
 ...aultExcludeNodeModulesAndOutDirWithAllowJS.json | 12 ++++++++++++
 .../node/OutDir/a.js                               |  1 +
 ...aultExcludeNodeModulesAndOutDirWithAllowJS.json | 12 ++++++++++++
 .../amd/OutDir/a.d.ts                              |  1 +
 .../amd/OutDir/a.js                                |  1 +
 ...ultExcludeNodeModulesAndRelativePathOutDir.json | 14 ++++++++++++++
 .../node/OutDir/a.d.ts                             |  1 +
 .../node/OutDir/a.js                               |  1 +
 ...ultExcludeNodeModulesAndRelativePathOutDir.json | 14 ++++++++++++++
 .../amd/OutDir/a.js                                |  1 +
 ...odeModulesAndRelativePathOutDirWithAllowJS.json | 12 ++++++++++++
 .../node/OutDir/a.js                               |  1 +
 ...odeModulesAndRelativePathOutDirWithAllowJS.json | 12 ++++++++++++
 .../defaultExcludeOnlyNodeModules/amd/a.d.ts       |  1 +
 .../project/defaultExcludeOnlyNodeModules/amd/a.js |  1 +
 .../amd/defaultExcludeOnlyNodeModules.json         | 14 ++++++++++++++
 .../defaultExcludeOnlyNodeModules/node/a.d.ts      |  1 +
 .../defaultExcludeOnlyNodeModules/node/a.js        |  1 +
 .../node/defaultExcludeOnlyNodeModules.json        | 14 ++++++++++++++
 .../amd/OutDir/a.d.ts                              |  1 +
 .../amd/OutDir/a.js                                |  1 +
 .../amd/specifyExcludeUsingRelativepath.json       | 14 ++++++++++++++
 .../node/OutDir/a.d.ts                             |  1 +
 .../node/OutDir/a.js                               |  1 +
 .../node/specifyExcludeUsingRelativepath.json      | 14 ++++++++++++++
 .../amd/OutDir/a.js                                |  1 +
 ...specifyExcludeUsingRelativepathWithAllowJS.json | 12 ++++++++++++
 .../node/OutDir/a.js                               |  1 +
 ...specifyExcludeUsingRelativepathWithAllowJS.json | 12 ++++++++++++
 .../amd/OutDir/a.d.ts                              |  1 +
 .../amd/OutDir/a.js                                |  1 +
 .../specifyExcludeWithOutUsingRelativePath.json    | 14 ++++++++++++++
 .../node/OutDir/a.d.ts                             |  1 +
 .../node/OutDir/a.js                               |  1 +
 .../specifyExcludeWithOutUsingRelativePath.json    | 14 ++++++++++++++
 .../amd/OutDir/a.js                                |  1 +
 ...ExcludeWithOutUsingRelativePathWithAllowJS.json | 12 ++++++++++++
 .../node/OutDir/a.js                               |  1 +
 ...ExcludeWithOutUsingRelativePathWithAllowJS.json | 12 ++++++++++++
 .../defaultExcludeNodeModulesAndOutDir.json        |  6 ++++++
 ...aultExcludeNodeModulesAndOutDirWithAllowJS.json |  5 +++++
 ...ultExcludeNodeModulesAndRelativePathOutDir.json |  6 ++++++
 ...odeModulesAndRelativePathOutDirWithAllowJS.json |  5 +++++
 .../project/defaultExcludeOnlyNodeModules.json     |  6 ++++++
 .../project/specifyExcludeUsingRelativepath.json   |  6 ++++++
 ...specifyExcludeUsingRelativepathWithAllowJS.json |  5 +++++
 .../specifyExcludeWithOutUsingRelativePath.json    |  6 ++++++
 ...ExcludeWithOutUsingRelativePathWithAllowJS.json |  5 +++++
 .../OutDir/a.d.ts                                  |  1 +
 .../DefaultExcludeNodeModulesAndOutDir/a.ts        |  1 +
 .../node_modules/myLib/myLib.d.ts                  |  2 ++
 .../tsconfig.json                                  |  6 ++++++
 .../OutDir/a.d.ts                                  |  1 +
 .../a.ts                                           |  1 +
 .../node_modules/myLib/myLib.d.ts                  |  2 ++
 .../tsconfig.json                                  |  6 ++++++
 .../OutDir/a.d.ts                                  |  1 +
 .../a.ts                                           |  1 +
 .../node_modules/myLib/myLib.d.ts                  |  2 ++
 .../tsconfig.json                                  |  6 ++++++
 .../OutDir/a.d.ts                                  |  1 +
 .../a.ts                                           |  1 +
 .../node_modules/myLib/myLib.d.ts                  |  2 ++
 .../tsconfig.json                                  |  6 ++++++
 .../DefaultExcludeOnlyNodeModules/a.ts             |  1 +
 .../node_modules/myLib/myLib.d.ts                  |  2 ++
 .../DefaultExcludeOnlyNodeModules/tsconfig.json    |  5 +++++
 .../SpecifyExcludeUsingRelativePath/OutDir/a.d.ts  |  1 +
 .../SpecifyExcludeUsingRelativePath/a.ts           |  1 +
 .../node_modules/myLib/myLib.d.ts                  |  2 ++
 .../SpecifyExcludeUsingRelativePath/tsconfig.json  | 10 ++++++++++
 .../OutDir/a.d.ts                                  |  1 +
 .../a.ts                                           |  1 +
 .../node_modules/myLib/myLib.d.ts                  |  2 ++
 .../tsconfig.json                                  | 10 ++++++++++
 .../OutDir/a.d.ts                                  |  1 +
 .../SpecifyExcludeWithOutUsingRelativePath/a.ts    |  1 +
 .../node_modules/myLib/myLib.d.ts                  |  2 ++
 .../tsconfig.json                                  | 10 ++++++++++
 .../OutDir/a.d.ts                                  |  1 +
 .../a.ts                                           |  1 +
 .../node_modules/myLib/myLib.d.ts                  |  2 ++
 .../tsconfig.json                                  | 10 ++++++++++
 92 files changed, 420 insertions(+), 2 deletions(-)
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/amd/OutDir/a.d.ts
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/amd/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/amd/defaultExcludeNodeModulesAndOutDir.json
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/node/OutDir/a.d.ts
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/node/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/node/defaultExcludeNodeModulesAndOutDir.json
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/amd/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/amd/defaultExcludeNodeModulesAndOutDirWithAllowJS.json
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/node/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/node/defaultExcludeNodeModulesAndOutDirWithAllowJS.json
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/amd/OutDir/a.d.ts
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/amd/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/amd/defaultExcludeNodeModulesAndRelativePathOutDir.json
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/node/OutDir/a.d.ts
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/node/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/node/defaultExcludeNodeModulesAndRelativePathOutDir.json
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/amd/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/amd/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS.json
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/node/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/node/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS.json
 create mode 100644 tests/baselines/reference/project/defaultExcludeOnlyNodeModules/amd/a.d.ts
 create mode 100644 tests/baselines/reference/project/defaultExcludeOnlyNodeModules/amd/a.js
 create mode 100644 tests/baselines/reference/project/defaultExcludeOnlyNodeModules/amd/defaultExcludeOnlyNodeModules.json
 create mode 100644 tests/baselines/reference/project/defaultExcludeOnlyNodeModules/node/a.d.ts
 create mode 100644 tests/baselines/reference/project/defaultExcludeOnlyNodeModules/node/a.js
 create mode 100644 tests/baselines/reference/project/defaultExcludeOnlyNodeModules/node/defaultExcludeOnlyNodeModules.json
 create mode 100644 tests/baselines/reference/project/specifyExcludeUsingRelativepath/amd/OutDir/a.d.ts
 create mode 100644 tests/baselines/reference/project/specifyExcludeUsingRelativepath/amd/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/specifyExcludeUsingRelativepath/amd/specifyExcludeUsingRelativepath.json
 create mode 100644 tests/baselines/reference/project/specifyExcludeUsingRelativepath/node/OutDir/a.d.ts
 create mode 100644 tests/baselines/reference/project/specifyExcludeUsingRelativepath/node/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/specifyExcludeUsingRelativepath/node/specifyExcludeUsingRelativepath.json
 create mode 100644 tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/amd/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/amd/specifyExcludeUsingRelativepathWithAllowJS.json
 create mode 100644 tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/node/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/node/specifyExcludeUsingRelativepathWithAllowJS.json
 create mode 100644 tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/amd/OutDir/a.d.ts
 create mode 100644 tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/amd/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/amd/specifyExcludeWithOutUsingRelativePath.json
 create mode 100644 tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/node/OutDir/a.d.ts
 create mode 100644 tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/node/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/node/specifyExcludeWithOutUsingRelativePath.json
 create mode 100644 tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/amd/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/amd/specifyExcludeWithOutUsingRelativePathWithAllowJS.json
 create mode 100644 tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/node/OutDir/a.js
 create mode 100644 tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/node/specifyExcludeWithOutUsingRelativePathWithAllowJS.json
 create mode 100644 tests/cases/project/defaultExcludeNodeModulesAndOutDir.json
 create mode 100644 tests/cases/project/defaultExcludeNodeModulesAndOutDirWithAllowJS.json
 create mode 100644 tests/cases/project/defaultExcludeNodeModulesAndRelativePathOutDir.json
 create mode 100644 tests/cases/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS.json
 create mode 100644 tests/cases/project/defaultExcludeOnlyNodeModules.json
 create mode 100644 tests/cases/project/specifyExcludeUsingRelativepath.json
 create mode 100644 tests/cases/project/specifyExcludeUsingRelativepathWithAllowJS.json
 create mode 100644 tests/cases/project/specifyExcludeWithOutUsingRelativePath.json
 create mode 100644 tests/cases/project/specifyExcludeWithOutUsingRelativePathWithAllowJS.json
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/OutDir/a.d.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/a.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/node_modules/myLib/myLib.d.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/tsconfig.json
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/OutDir/a.d.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/a.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/node_modules/myLib/myLib.d.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/tsconfig.json
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/OutDir/a.d.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/a.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/node_modules/myLib/myLib.d.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/tsconfig.json
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/OutDir/a.d.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/a.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/node_modules/myLib/myLib.d.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/tsconfig.json
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules/a.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules/node_modules/myLib/myLib.d.ts
 create mode 100644 tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules/tsconfig.json
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/OutDir/a.d.ts
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/a.ts
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/node_modules/myLib/myLib.d.ts
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/tsconfig.json
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/OutDir/a.d.ts
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/a.ts
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/node_modules/myLib/myLib.d.ts
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/tsconfig.json
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/OutDir/a.d.ts
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/a.ts
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/node_modules/myLib/myLib.d.ts
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/tsconfig.json
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/OutDir/a.d.ts
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/a.ts
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/node_modules/myLib/myLib.d.ts
 create mode 100644 tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/tsconfig.json

diff --git a/.gitignore b/.gitignore
index 4f9ec0649b3..e61c3510e37 100644
--- a/.gitignore
+++ b/.gitignore
@@ -34,7 +34,6 @@ tests/webhost/*.d.ts
 tests/webhost/webtsc.js
 tests/cases/**/*.js
 tests/cases/**/*.js.map
-tests/cases/**/*.d.ts
 *.config
 scripts/debug.bat
 scripts/run.bat
@@ -49,3 +48,4 @@ internal/
 **/.vs
 **/.vscode
 !**/.vscode/tasks.json
+!tests/cases/projects/projectOption/**/node_modules
diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 506a2d5bee4..8fc74b3a3b6 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -717,7 +717,7 @@ namespace ts {
                 if (outDir) {
                     exclude.push(outDir);
                 }
-                exclude = map(exclude, normalizeSlashes);
+                exclude = map(exclude, e => getNormalizedAbsolutePath(e, basePath));
 
                 const supportedExtensions = getSupportedExtensions(options);
                 Debug.assert(indexOf(supportedExtensions, ".ts") < indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/amd/OutDir/a.d.ts b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/amd/OutDir/a.d.ts
new file mode 100644
index 00000000000..4c0b8989316
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/amd/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/amd/OutDir/a.js b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/amd/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/amd/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/amd/defaultExcludeNodeModulesAndOutDir.json b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/amd/defaultExcludeNodeModulesAndOutDir.json
new file mode 100644
index 00000000000..7e2820a05a0
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/amd/defaultExcludeNodeModulesAndOutDir.json
@@ -0,0 +1,14 @@
+{
+    "scenario": "Verify default exclude property in project option",
+    "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir",
+    "baselineCheck": true,
+    "declaration": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js",
+        "OutDir/a.d.ts"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/node/OutDir/a.d.ts b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/node/OutDir/a.d.ts
new file mode 100644
index 00000000000..4c0b8989316
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/node/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/node/OutDir/a.js b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/node/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/node/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/node/defaultExcludeNodeModulesAndOutDir.json b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/node/defaultExcludeNodeModulesAndOutDir.json
new file mode 100644
index 00000000000..7e2820a05a0
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDir/node/defaultExcludeNodeModulesAndOutDir.json
@@ -0,0 +1,14 @@
+{
+    "scenario": "Verify default exclude property in project option",
+    "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir",
+    "baselineCheck": true,
+    "declaration": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js",
+        "OutDir/a.d.ts"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/amd/OutDir/a.js b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/amd/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/amd/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/amd/defaultExcludeNodeModulesAndOutDirWithAllowJS.json b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/amd/defaultExcludeNodeModulesAndOutDirWithAllowJS.json
new file mode 100644
index 00000000000..a4183e5d5cf
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/amd/defaultExcludeNodeModulesAndOutDirWithAllowJS.json
@@ -0,0 +1,12 @@
+{
+    "scenario": "Verify default exclude property in project option",
+    "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS",
+    "baselineCheck": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/node/OutDir/a.js b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/node/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/node/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/node/defaultExcludeNodeModulesAndOutDirWithAllowJS.json b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/node/defaultExcludeNodeModulesAndOutDirWithAllowJS.json
new file mode 100644
index 00000000000..a4183e5d5cf
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndOutDirWithAllowJS/node/defaultExcludeNodeModulesAndOutDirWithAllowJS.json
@@ -0,0 +1,12 @@
+{
+    "scenario": "Verify default exclude property in project option",
+    "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS",
+    "baselineCheck": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/amd/OutDir/a.d.ts b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/amd/OutDir/a.d.ts
new file mode 100644
index 00000000000..4c0b8989316
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/amd/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/amd/OutDir/a.js b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/amd/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/amd/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/amd/defaultExcludeNodeModulesAndRelativePathOutDir.json b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/amd/defaultExcludeNodeModulesAndRelativePathOutDir.json
new file mode 100644
index 00000000000..66c0c65ad21
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/amd/defaultExcludeNodeModulesAndRelativePathOutDir.json
@@ -0,0 +1,14 @@
+{
+    "scenario": "Verify default exclude property with relative path for 'outDir' in project option",
+    "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir",
+    "baselineCheck": true,
+    "declaration": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js",
+        "OutDir/a.d.ts"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/node/OutDir/a.d.ts b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/node/OutDir/a.d.ts
new file mode 100644
index 00000000000..4c0b8989316
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/node/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/node/OutDir/a.js b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/node/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/node/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/node/defaultExcludeNodeModulesAndRelativePathOutDir.json b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/node/defaultExcludeNodeModulesAndRelativePathOutDir.json
new file mode 100644
index 00000000000..66c0c65ad21
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDir/node/defaultExcludeNodeModulesAndRelativePathOutDir.json
@@ -0,0 +1,14 @@
+{
+    "scenario": "Verify default exclude property with relative path for 'outDir' in project option",
+    "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir",
+    "baselineCheck": true,
+    "declaration": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js",
+        "OutDir/a.d.ts"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/amd/OutDir/a.js b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/amd/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/amd/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/amd/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS.json b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/amd/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS.json
new file mode 100644
index 00000000000..9b8a9465299
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/amd/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS.json
@@ -0,0 +1,12 @@
+{
+    "scenario": "Verify default exclude property with relative path for 'outDir' in project option",
+    "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS",
+    "baselineCheck": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/node/OutDir/a.js b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/node/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/node/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/node/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS.json b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/node/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS.json
new file mode 100644
index 00000000000..9b8a9465299
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/node/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS.json
@@ -0,0 +1,12 @@
+{
+    "scenario": "Verify default exclude property with relative path for 'outDir' in project option",
+    "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS",
+    "baselineCheck": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/amd/a.d.ts b/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/amd/a.d.ts
new file mode 100644
index 00000000000..4c0b8989316
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/amd/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
diff --git a/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/amd/a.js b/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/amd/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/amd/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/amd/defaultExcludeOnlyNodeModules.json b/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/amd/defaultExcludeOnlyNodeModules.json
new file mode 100644
index 00000000000..2077f9421c2
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/amd/defaultExcludeOnlyNodeModules.json
@@ -0,0 +1,14 @@
+{
+    "scenario": "Verify default exclude property with only node_modules in project option",
+    "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules",
+    "baselineCheck": true,
+    "declaration": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "a.js",
+        "a.d.ts"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/node/a.d.ts b/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/node/a.d.ts
new file mode 100644
index 00000000000..4c0b8989316
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/node/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
diff --git a/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/node/a.js b/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/node/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/node/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/node/defaultExcludeOnlyNodeModules.json b/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/node/defaultExcludeOnlyNodeModules.json
new file mode 100644
index 00000000000..2077f9421c2
--- /dev/null
+++ b/tests/baselines/reference/project/defaultExcludeOnlyNodeModules/node/defaultExcludeOnlyNodeModules.json
@@ -0,0 +1,14 @@
+{
+    "scenario": "Verify default exclude property with only node_modules in project option",
+    "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules",
+    "baselineCheck": true,
+    "declaration": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "a.js",
+        "a.d.ts"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/specifyExcludeUsingRelativepath/amd/OutDir/a.d.ts b/tests/baselines/reference/project/specifyExcludeUsingRelativepath/amd/OutDir/a.d.ts
new file mode 100644
index 00000000000..4c0b8989316
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeUsingRelativepath/amd/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
diff --git a/tests/baselines/reference/project/specifyExcludeUsingRelativepath/amd/OutDir/a.js b/tests/baselines/reference/project/specifyExcludeUsingRelativepath/amd/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeUsingRelativepath/amd/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/specifyExcludeUsingRelativepath/amd/specifyExcludeUsingRelativepath.json b/tests/baselines/reference/project/specifyExcludeUsingRelativepath/amd/specifyExcludeUsingRelativepath.json
new file mode 100644
index 00000000000..3b26700a7a4
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeUsingRelativepath/amd/specifyExcludeUsingRelativepath.json
@@ -0,0 +1,14 @@
+{
+    "scenario": "Verify exclude property without using relative path",
+    "projectRoot": "tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath",
+    "baselineCheck": true,
+    "declaration": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js",
+        "OutDir/a.d.ts"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/specifyExcludeUsingRelativepath/node/OutDir/a.d.ts b/tests/baselines/reference/project/specifyExcludeUsingRelativepath/node/OutDir/a.d.ts
new file mode 100644
index 00000000000..4c0b8989316
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeUsingRelativepath/node/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
diff --git a/tests/baselines/reference/project/specifyExcludeUsingRelativepath/node/OutDir/a.js b/tests/baselines/reference/project/specifyExcludeUsingRelativepath/node/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeUsingRelativepath/node/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/specifyExcludeUsingRelativepath/node/specifyExcludeUsingRelativepath.json b/tests/baselines/reference/project/specifyExcludeUsingRelativepath/node/specifyExcludeUsingRelativepath.json
new file mode 100644
index 00000000000..3b26700a7a4
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeUsingRelativepath/node/specifyExcludeUsingRelativepath.json
@@ -0,0 +1,14 @@
+{
+    "scenario": "Verify exclude property without using relative path",
+    "projectRoot": "tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath",
+    "baselineCheck": true,
+    "declaration": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js",
+        "OutDir/a.d.ts"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/amd/OutDir/a.js b/tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/amd/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/amd/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/amd/specifyExcludeUsingRelativepathWithAllowJS.json b/tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/amd/specifyExcludeUsingRelativepathWithAllowJS.json
new file mode 100644
index 00000000000..328b95c174e
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/amd/specifyExcludeUsingRelativepathWithAllowJS.json
@@ -0,0 +1,12 @@
+{
+    "scenario": "Verify exclude property without using relative path",
+    "projectRoot": "tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS",
+    "baselineCheck": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/node/OutDir/a.js b/tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/node/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/node/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/node/specifyExcludeUsingRelativepathWithAllowJS.json b/tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/node/specifyExcludeUsingRelativepathWithAllowJS.json
new file mode 100644
index 00000000000..328b95c174e
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeUsingRelativepathWithAllowJS/node/specifyExcludeUsingRelativepathWithAllowJS.json
@@ -0,0 +1,12 @@
+{
+    "scenario": "Verify exclude property without using relative path",
+    "projectRoot": "tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS",
+    "baselineCheck": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/amd/OutDir/a.d.ts b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/amd/OutDir/a.d.ts
new file mode 100644
index 00000000000..4c0b8989316
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/amd/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
diff --git a/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/amd/OutDir/a.js b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/amd/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/amd/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/amd/specifyExcludeWithOutUsingRelativePath.json b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/amd/specifyExcludeWithOutUsingRelativePath.json
new file mode 100644
index 00000000000..fee8481a696
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/amd/specifyExcludeWithOutUsingRelativePath.json
@@ -0,0 +1,14 @@
+{
+    "scenario": "Verify exclude property without using relative path",
+    "projectRoot": "tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath",
+    "baselineCheck": true,
+    "declaration": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js",
+        "OutDir/a.d.ts"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/node/OutDir/a.d.ts b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/node/OutDir/a.d.ts
new file mode 100644
index 00000000000..4c0b8989316
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/node/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
diff --git a/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/node/OutDir/a.js b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/node/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/node/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/node/specifyExcludeWithOutUsingRelativePath.json b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/node/specifyExcludeWithOutUsingRelativePath.json
new file mode 100644
index 00000000000..fee8481a696
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePath/node/specifyExcludeWithOutUsingRelativePath.json
@@ -0,0 +1,14 @@
+{
+    "scenario": "Verify exclude property without using relative path",
+    "projectRoot": "tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath",
+    "baselineCheck": true,
+    "declaration": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js",
+        "OutDir/a.d.ts"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/amd/OutDir/a.js b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/amd/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/amd/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/amd/specifyExcludeWithOutUsingRelativePathWithAllowJS.json b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/amd/specifyExcludeWithOutUsingRelativePathWithAllowJS.json
new file mode 100644
index 00000000000..a5f096dfc29
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/amd/specifyExcludeWithOutUsingRelativePathWithAllowJS.json
@@ -0,0 +1,12 @@
+{
+    "scenario": "Verify exclude property without using relative path",
+    "projectRoot": "tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS",
+    "baselineCheck": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js"
+    ]
+}
\ No newline at end of file
diff --git a/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/node/OutDir/a.js b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/node/OutDir/a.js
new file mode 100644
index 00000000000..e757934f20c
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/node/OutDir/a.js
@@ -0,0 +1 @@
+var test = 10;
diff --git a/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/node/specifyExcludeWithOutUsingRelativePathWithAllowJS.json b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/node/specifyExcludeWithOutUsingRelativePathWithAllowJS.json
new file mode 100644
index 00000000000..a5f096dfc29
--- /dev/null
+++ b/tests/baselines/reference/project/specifyExcludeWithOutUsingRelativePathWithAllowJS/node/specifyExcludeWithOutUsingRelativePathWithAllowJS.json
@@ -0,0 +1,12 @@
+{
+    "scenario": "Verify exclude property without using relative path",
+    "projectRoot": "tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS",
+    "baselineCheck": true,
+    "resolvedInputFiles": [
+        "lib.d.ts",
+        "a.ts"
+    ],
+    "emittedFiles": [
+        "OutDir/a.js"
+    ]
+}
\ No newline at end of file
diff --git a/tests/cases/project/defaultExcludeNodeModulesAndOutDir.json b/tests/cases/project/defaultExcludeNodeModulesAndOutDir.json
new file mode 100644
index 00000000000..24e6c94aa2e
--- /dev/null
+++ b/tests/cases/project/defaultExcludeNodeModulesAndOutDir.json
@@ -0,0 +1,6 @@
+{
+  "scenario": "Verify default exclude property in project option",
+  "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir",
+  "baselineCheck": true,
+  "declaration": true
+}
\ No newline at end of file
diff --git a/tests/cases/project/defaultExcludeNodeModulesAndOutDirWithAllowJS.json b/tests/cases/project/defaultExcludeNodeModulesAndOutDirWithAllowJS.json
new file mode 100644
index 00000000000..06f97090d61
--- /dev/null
+++ b/tests/cases/project/defaultExcludeNodeModulesAndOutDirWithAllowJS.json
@@ -0,0 +1,5 @@
+{
+  "scenario": "Verify default exclude property in project option",
+  "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS",
+  "baselineCheck": true
+}
\ No newline at end of file
diff --git a/tests/cases/project/defaultExcludeNodeModulesAndRelativePathOutDir.json b/tests/cases/project/defaultExcludeNodeModulesAndRelativePathOutDir.json
new file mode 100644
index 00000000000..3ec5d45200a
--- /dev/null
+++ b/tests/cases/project/defaultExcludeNodeModulesAndRelativePathOutDir.json
@@ -0,0 +1,6 @@
+{
+  "scenario": "Verify default exclude property with relative path for 'outDir' in project option",
+  "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir",
+  "baselineCheck": true,
+  "declaration": true
+}
\ No newline at end of file
diff --git a/tests/cases/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS.json b/tests/cases/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS.json
new file mode 100644
index 00000000000..3aa1a4065b2
--- /dev/null
+++ b/tests/cases/project/defaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS.json
@@ -0,0 +1,5 @@
+{
+  "scenario": "Verify default exclude property with relative path for 'outDir' in project option",
+  "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS",
+  "baselineCheck": true
+}
\ No newline at end of file
diff --git a/tests/cases/project/defaultExcludeOnlyNodeModules.json b/tests/cases/project/defaultExcludeOnlyNodeModules.json
new file mode 100644
index 00000000000..dfed13c888b
--- /dev/null
+++ b/tests/cases/project/defaultExcludeOnlyNodeModules.json
@@ -0,0 +1,6 @@
+{
+  "scenario": "Verify default exclude property with only node_modules in project option",
+  "projectRoot": "tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules",
+  "baselineCheck": true,
+  "declaration": true
+}
\ No newline at end of file
diff --git a/tests/cases/project/specifyExcludeUsingRelativepath.json b/tests/cases/project/specifyExcludeUsingRelativepath.json
new file mode 100644
index 00000000000..b2ec249c38d
--- /dev/null
+++ b/tests/cases/project/specifyExcludeUsingRelativepath.json
@@ -0,0 +1,6 @@
+{
+  "scenario": "Verify exclude property without using relative path",
+  "projectRoot": "tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath",
+  "baselineCheck": true,
+  "declaration": true
+}
\ No newline at end of file
diff --git a/tests/cases/project/specifyExcludeUsingRelativepathWithAllowJS.json b/tests/cases/project/specifyExcludeUsingRelativepathWithAllowJS.json
new file mode 100644
index 00000000000..c073e8077da
--- /dev/null
+++ b/tests/cases/project/specifyExcludeUsingRelativepathWithAllowJS.json
@@ -0,0 +1,5 @@
+{
+  "scenario": "Verify exclude property without using relative path",
+  "projectRoot": "tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS",
+  "baselineCheck": true
+}
\ No newline at end of file
diff --git a/tests/cases/project/specifyExcludeWithOutUsingRelativePath.json b/tests/cases/project/specifyExcludeWithOutUsingRelativePath.json
new file mode 100644
index 00000000000..b279c5f0ac5
--- /dev/null
+++ b/tests/cases/project/specifyExcludeWithOutUsingRelativePath.json
@@ -0,0 +1,6 @@
+{
+  "scenario": "Verify exclude property without using relative path",
+  "projectRoot": "tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath",
+  "baselineCheck": true,
+  "declaration": true
+}
\ No newline at end of file
diff --git a/tests/cases/project/specifyExcludeWithOutUsingRelativePathWithAllowJS.json b/tests/cases/project/specifyExcludeWithOutUsingRelativePathWithAllowJS.json
new file mode 100644
index 00000000000..53f030b9577
--- /dev/null
+++ b/tests/cases/project/specifyExcludeWithOutUsingRelativePathWithAllowJS.json
@@ -0,0 +1,5 @@
+{
+  "scenario": "Verify exclude property without using relative path",
+  "projectRoot": "tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS",
+  "baselineCheck": true
+}
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/OutDir/a.d.ts b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/OutDir/a.d.ts
new file mode 100644
index 00000000000..d9e24d329b7
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/a.ts b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/a.ts
new file mode 100644
index 00000000000..6d820a0093e
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/a.ts
@@ -0,0 +1 @@
+var test = 10;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/node_modules/myLib/myLib.d.ts b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/node_modules/myLib/myLib.d.ts
new file mode 100644
index 00000000000..b2ff898d36a
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/node_modules/myLib/myLib.d.ts
@@ -0,0 +1,2 @@
+// This files shouldn't be included in the compilation
+declare var test: string;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/tsconfig.json b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/tsconfig.json
new file mode 100644
index 00000000000..637d2079039
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDir/tsconfig.json
@@ -0,0 +1,6 @@
+{ 
+    "compilerOptions": {
+        "outDir": "OutDir",
+        "declaration": true
+    }
+}
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/OutDir/a.d.ts b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/OutDir/a.d.ts
new file mode 100644
index 00000000000..d9e24d329b7
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/a.ts b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/a.ts
new file mode 100644
index 00000000000..6d820a0093e
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/a.ts
@@ -0,0 +1 @@
+var test = 10;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/node_modules/myLib/myLib.d.ts b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/node_modules/myLib/myLib.d.ts
new file mode 100644
index 00000000000..b2ff898d36a
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/node_modules/myLib/myLib.d.ts
@@ -0,0 +1,2 @@
+// This files shouldn't be included in the compilation
+declare var test: string;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/tsconfig.json b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/tsconfig.json
new file mode 100644
index 00000000000..01e0acc0301
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndOutDirWithAllowJS/tsconfig.json
@@ -0,0 +1,6 @@
+{ 
+    "compilerOptions": {
+        "outDir": "OutDir",
+        "allowJs": true
+    }
+}
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/OutDir/a.d.ts b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/OutDir/a.d.ts
new file mode 100644
index 00000000000..d9e24d329b7
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/a.ts b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/a.ts
new file mode 100644
index 00000000000..b31b769ead0
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/a.ts
@@ -0,0 +1 @@
+    var test = 10;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/node_modules/myLib/myLib.d.ts b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/node_modules/myLib/myLib.d.ts
new file mode 100644
index 00000000000..b2ff898d36a
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/node_modules/myLib/myLib.d.ts
@@ -0,0 +1,2 @@
+// This files shouldn't be included in the compilation
+declare var test: string;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/tsconfig.json b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/tsconfig.json
new file mode 100644
index 00000000000..714a54ab5f0
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDir/tsconfig.json
@@ -0,0 +1,6 @@
+{ 
+    "compilerOptions": {
+        "outDir": "./OutDir",
+        "declaration": true
+    }
+}
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/OutDir/a.d.ts b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/OutDir/a.d.ts
new file mode 100644
index 00000000000..d9e24d329b7
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: number;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/a.ts b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/a.ts
new file mode 100644
index 00000000000..b31b769ead0
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/a.ts
@@ -0,0 +1 @@
+    var test = 10;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/node_modules/myLib/myLib.d.ts b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/node_modules/myLib/myLib.d.ts
new file mode 100644
index 00000000000..b2ff898d36a
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/node_modules/myLib/myLib.d.ts
@@ -0,0 +1,2 @@
+// This files shouldn't be included in the compilation
+declare var test: string;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/tsconfig.json b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/tsconfig.json
new file mode 100644
index 00000000000..a58e13f4210
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeNodeModulesAndRelativePathOutDirWithAllowJS/tsconfig.json
@@ -0,0 +1,6 @@
+{ 
+    "compilerOptions": {
+        "outDir": "./OutDir",
+        "allowJs": true
+    }
+}
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules/a.ts b/tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules/a.ts
new file mode 100644
index 00000000000..6d820a0093e
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules/a.ts
@@ -0,0 +1 @@
+var test = 10;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules/node_modules/myLib/myLib.d.ts b/tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules/node_modules/myLib/myLib.d.ts
new file mode 100644
index 00000000000..b2ff898d36a
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules/node_modules/myLib/myLib.d.ts
@@ -0,0 +1,2 @@
+// This files shouldn't be included in the compilation
+declare var test: string;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules/tsconfig.json b/tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules/tsconfig.json
new file mode 100644
index 00000000000..17886db3a33
--- /dev/null
+++ b/tests/cases/projects/projectOption/DefaultExcludeOnlyNodeModules/tsconfig.json
@@ -0,0 +1,5 @@
+{ 
+    "compilerOptions": {
+        "target": "es5"
+    }
+}
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/OutDir/a.d.ts b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/OutDir/a.d.ts
new file mode 100644
index 00000000000..fb088b509a2
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: string;  // Shouldn't error since it is not include in compilation
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/a.ts b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/a.ts
new file mode 100644
index 00000000000..b31b769ead0
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/a.ts
@@ -0,0 +1 @@
+    var test = 10;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/node_modules/myLib/myLib.d.ts b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/node_modules/myLib/myLib.d.ts
new file mode 100644
index 00000000000..b2ff898d36a
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/node_modules/myLib/myLib.d.ts
@@ -0,0 +1,2 @@
+// This files shouldn't be included in the compilation
+declare var test: string;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/tsconfig.json b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/tsconfig.json
new file mode 100644
index 00000000000..1bca6b45760
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePath/tsconfig.json
@@ -0,0 +1,10 @@
+{ 
+    "compilerOptions": {
+        "outDir": "./OutDir",
+        "declaration": true
+    },
+    "exclude": [
+        "./node_modules",
+        "./OutDir"  
+    ]
+}
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/OutDir/a.d.ts b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/OutDir/a.d.ts
new file mode 100644
index 00000000000..fb088b509a2
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: string;  // Shouldn't error since it is not include in compilation
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/a.ts b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/a.ts
new file mode 100644
index 00000000000..b31b769ead0
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/a.ts
@@ -0,0 +1 @@
+    var test = 10;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/node_modules/myLib/myLib.d.ts b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/node_modules/myLib/myLib.d.ts
new file mode 100644
index 00000000000..b2ff898d36a
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/node_modules/myLib/myLib.d.ts
@@ -0,0 +1,2 @@
+// This files shouldn't be included in the compilation
+declare var test: string;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/tsconfig.json b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/tsconfig.json
new file mode 100644
index 00000000000..e9b9f86e5cf
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeUsingRelativePathWithAllowJS/tsconfig.json
@@ -0,0 +1,10 @@
+{ 
+    "compilerOptions": {
+        "outDir": "./OutDir",
+        "allowJs": true
+    },
+    "exclude": [
+        "./node_modules",
+        "./OutDir"  
+    ]
+}
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/OutDir/a.d.ts b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/OutDir/a.d.ts
new file mode 100644
index 00000000000..fb088b509a2
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: string;  // Shouldn't error since it is not include in compilation
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/a.ts b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/a.ts
new file mode 100644
index 00000000000..b31b769ead0
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/a.ts
@@ -0,0 +1 @@
+    var test = 10;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/node_modules/myLib/myLib.d.ts b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/node_modules/myLib/myLib.d.ts
new file mode 100644
index 00000000000..b2ff898d36a
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/node_modules/myLib/myLib.d.ts
@@ -0,0 +1,2 @@
+// This files shouldn't be included in the compilation
+declare var test: string;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/tsconfig.json b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/tsconfig.json
new file mode 100644
index 00000000000..c45ea619b8c
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePath/tsconfig.json
@@ -0,0 +1,10 @@
+{ 
+    "compilerOptions": {
+        "outDir": "OutDir",
+        "declaration": true
+    },
+    "exclude": [
+        "node_modules",
+        "OutDir"
+    ]
+}
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/OutDir/a.d.ts b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/OutDir/a.d.ts
new file mode 100644
index 00000000000..fb088b509a2
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/OutDir/a.d.ts
@@ -0,0 +1 @@
+declare var test: string;  // Shouldn't error since it is not include in compilation
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/a.ts b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/a.ts
new file mode 100644
index 00000000000..b31b769ead0
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/a.ts
@@ -0,0 +1 @@
+    var test = 10;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/node_modules/myLib/myLib.d.ts b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/node_modules/myLib/myLib.d.ts
new file mode 100644
index 00000000000..b2ff898d36a
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/node_modules/myLib/myLib.d.ts
@@ -0,0 +1,2 @@
+// This files shouldn't be included in the compilation
+declare var test: string;
\ No newline at end of file
diff --git a/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/tsconfig.json b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/tsconfig.json
new file mode 100644
index 00000000000..a80c64d2dac
--- /dev/null
+++ b/tests/cases/projects/projectOption/SpecifyExcludeWithOutUsingRelativePathWithAllowJS/tsconfig.json
@@ -0,0 +1,10 @@
+{ 
+    "compilerOptions": {
+        "outDir": "OutDir",
+        "allowJs": true
+    },
+    "exclude": [
+        "node_modules",
+        "OutDir"
+    ]
+}
\ No newline at end of file

From cc5dd5bf797dddb75304eedff9fd9aa61d39d7b1 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Wed, 8 Jun 2016 13:22:15 -0700
Subject: [PATCH 210/332] Add comments

---
 src/services/services.ts | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/services/services.ts b/src/services/services.ts
index 7c743aa86de..fa4333b7492 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -4164,12 +4164,15 @@ namespace ts {
 
                 const argumentInfo = SignatureHelp.getContainingArgumentInfo(node, position, sourceFile);
                 if (argumentInfo) {
+                    // Get string literal completions from specialized signatures of the target
                     return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo);
                 }
                 else if (isElementAccessExpression(node.parent) && node.parent.argumentExpression === node) {
+                    // Get all names of properties on the expression
                     return getStringLiteralCompletionEntriesFromElementAccess(node.parent);
                 }
                 else {
+                    // Otherwise, get the completions from the contextual type if one exists
                     return getStringLiteralCompletionEntriesFromContextualType(<StringLiteral>node);
                 }
             }

From 9fac99e6922912916c92689483babd38854d8d1f Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Wed, 8 Jun 2016 14:23:42 -0700
Subject: [PATCH 211/332] Add test case

The test passes in 1.8 and fails in master.
---
 .../inferParameterWithMethodCallInitializer.ts       | 12 ++++++++++++
 1 file changed, 12 insertions(+)
 create mode 100644 tests/cases/compiler/inferParameterWithMethodCallInitializer.ts

diff --git a/tests/cases/compiler/inferParameterWithMethodCallInitializer.ts b/tests/cases/compiler/inferParameterWithMethodCallInitializer.ts
new file mode 100644
index 00000000000..ba38c7cb909
--- /dev/null
+++ b/tests/cases/compiler/inferParameterWithMethodCallInitializer.ts
@@ -0,0 +1,12 @@
+// @noImplicitAny: true
+function getNumber(): number {
+    return 1;
+}
+class Example {
+    getNumber(): number {
+        return 1;
+    }
+    doSomething(a = this.getNumber()): typeof a {
+        return a;
+    }
+}

From de8ddd6e1431826a8be6c81c1be5cbac231b76ff Mon Sep 17 00:00:00 2001
From: Zhengbo Li <zhengbli@microsoft.com>
Date: Wed, 8 Jun 2016 14:42:53 -0700
Subject: [PATCH 212/332] Return trace when exception happens

---
 src/server/session.ts | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/server/session.ts b/src/server/session.ts
index 7f3ba105999..0ec3d87e58c 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -1207,7 +1207,11 @@ namespace ts.server {
                     // Handle cancellation exceptions
                 }
                 this.logError(err, message);
-                this.output(undefined, request ? request.command : CommandNames.Unknown, request ? request.seq : 0, "Error processing request. " + err.message);
+                this.output(
+                    undefined,
+                    request ? request.command : CommandNames.Unknown,
+                    request ? request.seq : 0,
+                    "Error processing request. " + (<StackTraceError>err).message + "\n" + (<StackTraceError>err).stack);
             }
         }
     }

From 5a0ae4ad2266d3c60e9d5033c2f9b5ec29a6736b Mon Sep 17 00:00:00 2001
From: Wesley Wigham <wwigham@gmail.com>
Date: Wed, 8 Jun 2016 15:31:03 -0700
Subject: [PATCH 213/332] Remove Long-Done TODO

AFAIK, the harness sources have been concatenated into `run.js` for as long as I've known. This stops executing them twice (and in turn makes debugging tests much easier, since you no longer have to debug into eval'd code).
---
 src/harness/harness.ts | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index 5fe5b84ac91..b17abc613a3 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -1692,6 +1692,3 @@ namespace Harness {
 
     if (Error) (<any>Error).stackTraceLimit = 1;
 }
-
-// TODO: not sure why Utils.evalFile isn't working with this, eventually will concat it like old compiler instead of eval
-eval(Harness.tcServicesFile);

From 7c1b28f2cbb0327e46411db789edf04cb961685e Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Wed, 8 Jun 2016 15:55:08 -0700
Subject: [PATCH 214/332] Allow primitive type guards with typeof on right

Previously, only type guards of the form `typeof x === 'string'` were
allowed. Now you can write `'string' === typeof x`.
---
 src/compiler/binder.ts  | 16 +++++++++++++++-
 src/compiler/checker.ts | 17 +++++++++--------
 2 files changed, 24 insertions(+), 9 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 8c48d984b78..bfc9b07697b 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -612,7 +612,7 @@ namespace ts {
                     if (isNarrowingExpression(expr.left) && (expr.right.kind === SyntaxKind.NullKeyword || expr.right.kind === SyntaxKind.Identifier)) {
                         return true;
                     }
-                    if (expr.left.kind === SyntaxKind.TypeOfExpression && isNarrowingExpression((<TypeOfExpression>expr.left).expression) && expr.right.kind === SyntaxKind.StringLiteral) {
+                    if (isTypeOfNarrowingBinaryExpression(expr)) {
                         return true;
                     }
                     return false;
@@ -624,6 +624,20 @@ namespace ts {
             return false;
         }
 
+        function isTypeOfNarrowingBinaryExpression(expr: BinaryExpression) {
+            let typeOf: Expression;
+            if (expr.left.kind === SyntaxKind.StringLiteral) {
+                typeOf = expr.right;
+            }
+            else if (expr.right.kind === SyntaxKind.StringLiteral) {
+                typeOf = expr.left;
+            }
+            else {
+                typeOf = undefined;;
+            }
+            return typeOf && typeOf.kind === SyntaxKind.TypeOfExpression && isNarrowingExpression((<TypeOfExpression>typeOf).expression);
+        }
+
         function createBranchLabel(): FlowLabel {
             return {
                 flags: FlowFlags.BranchLabel,
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 650bc488b0e..dbc2c920dbb 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7864,7 +7864,8 @@ namespace ts {
                         if (isNullOrUndefinedLiteral(expr.right)) {
                             return narrowTypeByNullCheck(type, expr, assumeTrue);
                         }
-                        if (expr.left.kind === SyntaxKind.TypeOfExpression && expr.right.kind === SyntaxKind.StringLiteral) {
+                        if (expr.left.kind === SyntaxKind.TypeOfExpression && expr.right.kind === SyntaxKind.StringLiteral ||
+                            expr.left.kind === SyntaxKind.StringLiteral && expr.right.kind === SyntaxKind.TypeOfExpression) {
                             return narrowTypeByTypeof(type, expr, assumeTrue);
                         }
                         break;
@@ -7897,12 +7898,12 @@ namespace ts {
             function narrowTypeByTypeof(type: Type, expr: BinaryExpression, assumeTrue: boolean): Type {
                 // We have '==', '!=', '====', or !==' operator with 'typeof xxx' on the left
                 // and string literal on the right
-                const left = <TypeOfExpression>expr.left;
-                const right = <LiteralExpression>expr.right;
-                if (!isMatchingReference(reference, left.expression)) {
+                const typeOf = <TypeOfExpression>(expr.left.kind === SyntaxKind.TypeOfExpression ? expr.left : expr.right);
+                const literal = <LiteralExpression>(expr.right.kind === SyntaxKind.StringLiteral ? expr.right : expr.left);
+                if (!isMatchingReference(reference, typeOf.expression)) {
                     // For a reference of the form 'x.y', a 'typeof x === ...' type guard resets the
                     // narrowed type of 'y' to its declared type.
-                    if (containsMatchingReference(reference, left.expression)) {
+                    if (containsMatchingReference(reference, typeOf.expression)) {
                         return declaredType;
                     }
                     return type;
@@ -7915,14 +7916,14 @@ namespace ts {
                     // We narrow a non-union type to an exact primitive type if the non-union type
                     // is a supertype of that primtive type. For example, type 'any' can be narrowed
                     // to one of the primitive types.
-                    const targetType = getProperty(typeofTypesByName, right.text);
+                    const targetType = getProperty(typeofTypesByName, literal.text);
                     if (targetType && isTypeSubtypeOf(targetType, type)) {
                         return targetType;
                     }
                 }
                 const facts = assumeTrue ?
-                    getProperty(typeofEQFacts, right.text) || TypeFacts.TypeofEQHostObject :
-                    getProperty(typeofNEFacts, right.text) || TypeFacts.TypeofNEHostObject;
+                    getProperty(typeofEQFacts, literal.text) || TypeFacts.TypeofEQHostObject :
+                    getProperty(typeofNEFacts, literal.text) || TypeFacts.TypeofNEHostObject;
                 return getTypeWithFacts(type, facts);
             }
 

From 11377f9fd342dc21012e9cff1d60d0a2226f30e6 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Wed, 8 Jun 2016 15:56:25 -0700
Subject: [PATCH 215/332] Primitive type guards are now order independent

---
 ...typeGuardOfFormTypeOfIsOrderIndependent.js | 71 ++++++++++++++
 ...uardOfFormTypeOfIsOrderIndependent.symbols | 75 +++++++++++++++
 ...eGuardOfFormTypeOfIsOrderIndependent.types | 95 +++++++++++++++++++
 ...typeGuardOfFormTypeOfIsOrderIndependent.ts | 34 +++++++
 4 files changed, 275 insertions(+)
 create mode 100644 tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.js
 create mode 100644 tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.symbols
 create mode 100644 tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.types
 create mode 100644 tests/cases/conformance/expressions/typeGuards/typeGuardOfFormTypeOfIsOrderIndependent.ts

diff --git a/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.js b/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.js
new file mode 100644
index 00000000000..5ea7932e89a
--- /dev/null
+++ b/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.js
@@ -0,0 +1,71 @@
+//// [typeGuardOfFormTypeOfIsOrderIndependent.ts]
+var strOrNum: string | number;
+var strOrBool: string | boolean;
+var strOrFunc: string | (() => void);
+var numOrBool: number | boolean
+var str: string;
+var num: number;
+var bool: boolean;
+var func: () => void;
+
+if ("string" === typeof strOrNum) {
+// if (typeof strOrNum === "string") {
+    str = strOrNum;
+}
+else {
+    num = strOrNum;
+}
+if ("function" === typeof strOrFunc) {
+    func = strOrFunc;
+}
+else {
+    str = strOrFunc;
+}
+if ("number" === typeof numOrBool) {
+    num = numOrBool;
+}
+else {
+    bool = numOrBool;
+}
+if ("boolean" === typeof strOrBool) {
+    bool = strOrBool;
+}
+else {
+    str = strOrBool;
+}
+
+
+//// [typeGuardOfFormTypeOfIsOrderIndependent.js]
+var strOrNum;
+var strOrBool;
+var strOrFunc;
+var numOrBool;
+var str;
+var num;
+var bool;
+var func;
+if ("string" === typeof strOrNum) {
+    // if (typeof strOrNum === "string") {
+    str = strOrNum;
+}
+else {
+    num = strOrNum;
+}
+if ("function" === typeof strOrFunc) {
+    func = strOrFunc;
+}
+else {
+    str = strOrFunc;
+}
+if ("number" === typeof numOrBool) {
+    num = numOrBool;
+}
+else {
+    bool = numOrBool;
+}
+if ("boolean" === typeof strOrBool) {
+    bool = strOrBool;
+}
+else {
+    str = strOrBool;
+}
diff --git a/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.symbols b/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.symbols
new file mode 100644
index 00000000000..d75774eba45
--- /dev/null
+++ b/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.symbols
@@ -0,0 +1,75 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardOfFormTypeOfIsOrderIndependent.ts ===
+var strOrNum: string | number;
+>strOrNum : Symbol(strOrNum, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 0, 3))
+
+var strOrBool: string | boolean;
+>strOrBool : Symbol(strOrBool, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 1, 3))
+
+var strOrFunc: string | (() => void);
+>strOrFunc : Symbol(strOrFunc, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 2, 3))
+
+var numOrBool: number | boolean
+>numOrBool : Symbol(numOrBool, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 3, 3))
+
+var str: string;
+>str : Symbol(str, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 4, 3))
+
+var num: number;
+>num : Symbol(num, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 5, 3))
+
+var bool: boolean;
+>bool : Symbol(bool, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 6, 3))
+
+var func: () => void;
+>func : Symbol(func, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 7, 3))
+
+if ("string" === typeof strOrNum) {
+>strOrNum : Symbol(strOrNum, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 0, 3))
+
+// if (typeof strOrNum === "string") {
+    str = strOrNum;
+>str : Symbol(str, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 4, 3))
+>strOrNum : Symbol(strOrNum, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 0, 3))
+}
+else {
+    num = strOrNum;
+>num : Symbol(num, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 5, 3))
+>strOrNum : Symbol(strOrNum, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 0, 3))
+}
+if ("function" === typeof strOrFunc) {
+>strOrFunc : Symbol(strOrFunc, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 2, 3))
+
+    func = strOrFunc;
+>func : Symbol(func, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 7, 3))
+>strOrFunc : Symbol(strOrFunc, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 2, 3))
+}
+else {
+    str = strOrFunc;
+>str : Symbol(str, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 4, 3))
+>strOrFunc : Symbol(strOrFunc, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 2, 3))
+}
+if ("number" === typeof numOrBool) {
+>numOrBool : Symbol(numOrBool, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 3, 3))
+
+    num = numOrBool;
+>num : Symbol(num, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 5, 3))
+>numOrBool : Symbol(numOrBool, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 3, 3))
+}
+else {
+    bool = numOrBool;
+>bool : Symbol(bool, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 6, 3))
+>numOrBool : Symbol(numOrBool, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 3, 3))
+}
+if ("boolean" === typeof strOrBool) {
+>strOrBool : Symbol(strOrBool, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 1, 3))
+
+    bool = strOrBool;
+>bool : Symbol(bool, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 6, 3))
+>strOrBool : Symbol(strOrBool, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 1, 3))
+}
+else {
+    str = strOrBool;
+>str : Symbol(str, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 4, 3))
+>strOrBool : Symbol(strOrBool, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 1, 3))
+}
+
diff --git a/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.types b/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.types
new file mode 100644
index 00000000000..592d147f386
--- /dev/null
+++ b/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.types
@@ -0,0 +1,95 @@
+=== tests/cases/conformance/expressions/typeGuards/typeGuardOfFormTypeOfIsOrderIndependent.ts ===
+var strOrNum: string | number;
+>strOrNum : string | number
+
+var strOrBool: string | boolean;
+>strOrBool : string | boolean
+
+var strOrFunc: string | (() => void);
+>strOrFunc : string | (() => void)
+
+var numOrBool: number | boolean
+>numOrBool : number | boolean
+
+var str: string;
+>str : string
+
+var num: number;
+>num : number
+
+var bool: boolean;
+>bool : boolean
+
+var func: () => void;
+>func : () => void
+
+if ("string" === typeof strOrNum) {
+>"string" === typeof strOrNum : boolean
+>"string" : string
+>typeof strOrNum : string
+>strOrNum : string | number
+
+// if (typeof strOrNum === "string") {
+    str = strOrNum;
+>str = strOrNum : string
+>str : string
+>strOrNum : string
+}
+else {
+    num = strOrNum;
+>num = strOrNum : number
+>num : number
+>strOrNum : number
+}
+if ("function" === typeof strOrFunc) {
+>"function" === typeof strOrFunc : boolean
+>"function" : string
+>typeof strOrFunc : string
+>strOrFunc : string | (() => void)
+
+    func = strOrFunc;
+>func = strOrFunc : () => void
+>func : () => void
+>strOrFunc : () => void
+}
+else {
+    str = strOrFunc;
+>str = strOrFunc : string
+>str : string
+>strOrFunc : string
+}
+if ("number" === typeof numOrBool) {
+>"number" === typeof numOrBool : boolean
+>"number" : string
+>typeof numOrBool : string
+>numOrBool : number | boolean
+
+    num = numOrBool;
+>num = numOrBool : number
+>num : number
+>numOrBool : number
+}
+else {
+    bool = numOrBool;
+>bool = numOrBool : boolean
+>bool : boolean
+>numOrBool : boolean
+}
+if ("boolean" === typeof strOrBool) {
+>"boolean" === typeof strOrBool : boolean
+>"boolean" : string
+>typeof strOrBool : string
+>strOrBool : string | boolean
+
+    bool = strOrBool;
+>bool = strOrBool : boolean
+>bool : boolean
+>strOrBool : boolean
+}
+else {
+    str = strOrBool;
+>str = strOrBool : string
+>str : string
+>strOrBool : string
+}
+
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardOfFormTypeOfIsOrderIndependent.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardOfFormTypeOfIsOrderIndependent.ts
new file mode 100644
index 00000000000..79fcf49e245
--- /dev/null
+++ b/tests/cases/conformance/expressions/typeGuards/typeGuardOfFormTypeOfIsOrderIndependent.ts
@@ -0,0 +1,34 @@
+var strOrNum: string | number;
+var strOrBool: string | boolean;
+var strOrFunc: string | (() => void);
+var numOrBool: number | boolean
+var str: string;
+var num: number;
+var bool: boolean;
+var func: () => void;
+
+if ("string" === typeof strOrNum) {
+// if (typeof strOrNum === "string") {
+    str = strOrNum;
+}
+else {
+    num = strOrNum;
+}
+if ("function" === typeof strOrFunc) {
+    func = strOrFunc;
+}
+else {
+    str = strOrFunc;
+}
+if ("number" === typeof numOrBool) {
+    num = numOrBool;
+}
+else {
+    bool = numOrBool;
+}
+if ("boolean" === typeof strOrBool) {
+    bool = strOrBool;
+}
+else {
+    str = strOrBool;
+}

From d182a5978223f80154f4bd1b54e191b3546cf8ba Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Wed, 8 Jun 2016 16:35:39 -0700
Subject: [PATCH 216/332] Fix comments in tests

---
 .../reference/typeGuardIntersectionTypes.js   | 20 +++++++++----------
 .../typeGuardIntersectionTypes.symbols        | 16 ++++++---------
 .../typeGuardIntersectionTypes.types          | 16 ++++++---------
 .../typeGuards/typeGuardIntersectionTypes.ts  | 14 ++++++-------
 4 files changed, 27 insertions(+), 39 deletions(-)

diff --git a/tests/baselines/reference/typeGuardIntersectionTypes.js b/tests/baselines/reference/typeGuardIntersectionTypes.js
index 16d35c43889..6c46b982024 100644
--- a/tests/baselines/reference/typeGuardIntersectionTypes.js
+++ b/tests/baselines/reference/typeGuardIntersectionTypes.js
@@ -71,14 +71,14 @@ function identifyBeast(beast: Beast) {
 
         // All winged beasts with legs
         if (hasWings(beast)) {
-            if (beast.legs === 4) { // ERROR TS2339: Property 'legs' does not exist on type 'Winged'.
+            if (beast.legs === 4) {
                 log(`pegasus - 4 legs, wings`);
             }
-            else if (beast.legs === 2) { // ERROR TS2339...
+            else if (beast.legs === 2) {
                 log(`bird - 2 legs, wings`);
             }
             else {
-                log(`unknown - ${beast.legs} legs, wings`); // ERROR TS2339...
+                log(`unknown - ${beast.legs} legs, wings`);
             }
         }
 
@@ -101,16 +101,14 @@ function identifyBeast(beast: Beast) {
 
 function beastFoo(beast: Object) {
     if (hasWings(beast) && hasLegs(beast)) {
-        beast // beast is Legged
-        // ideally, beast would be Winged && Legged here...
+        beast;  // Winged & Legged
     }
     else {
-         beast
+        beast;
     }
 
     if (hasLegs(beast) && hasWings(beast)) {
-        beast // beast is Winged
-        // ideally, beast would be Legged && Winged here...
+        beast;  // Legged & Winged
     }
 }
 
@@ -152,7 +150,7 @@ function identifyBeast(beast) {
                 log("bird - 2 legs, wings");
             }
             else {
-                log("unknown - " + beast.legs + " legs, wings"); // ERROR TS2339...
+                log("unknown - " + beast.legs + " legs, wings");
             }
         }
         else {
@@ -170,12 +168,12 @@ function identifyBeast(beast) {
 }
 function beastFoo(beast) {
     if (hasWings(beast) && hasLegs(beast)) {
-        beast; // beast is Legged
+        beast; // Winged & Legged
     }
     else {
         beast;
     }
     if (hasLegs(beast) && hasWings(beast)) {
-        beast; // beast is Winged
+        beast; // Legged & Winged
     }
 }
diff --git a/tests/baselines/reference/typeGuardIntersectionTypes.symbols b/tests/baselines/reference/typeGuardIntersectionTypes.symbols
index c59d972cd30..707fb95b339 100644
--- a/tests/baselines/reference/typeGuardIntersectionTypes.symbols
+++ b/tests/baselines/reference/typeGuardIntersectionTypes.symbols
@@ -176,7 +176,7 @@ function identifyBeast(beast: Beast) {
 >hasWings : Symbol(hasWings, Decl(typeGuardIntersectionTypes.ts, 61, 83))
 >beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 65, 23))
 
-            if (beast.legs === 4) { // ERROR TS2339: Property 'legs' does not exist on type 'Winged'.
+            if (beast.legs === 4) {
 >beast.legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
 >beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 65, 23))
 >legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
@@ -184,7 +184,7 @@ function identifyBeast(beast: Beast) {
                 log(`pegasus - 4 legs, wings`);
 >log : Symbol(log, Decl(typeGuardIntersectionTypes.ts, 49, 1))
             }
-            else if (beast.legs === 2) { // ERROR TS2339...
+            else if (beast.legs === 2) {
 >beast.legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
 >beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 65, 23))
 >legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
@@ -193,7 +193,7 @@ function identifyBeast(beast: Beast) {
 >log : Symbol(log, Decl(typeGuardIntersectionTypes.ts, 49, 1))
             }
             else {
-                log(`unknown - ${beast.legs} legs, wings`); // ERROR TS2339...
+                log(`unknown - ${beast.legs} legs, wings`);
 >log : Symbol(log, Decl(typeGuardIntersectionTypes.ts, 49, 1))
 >beast.legs : Symbol(Legged.legs, Decl(typeGuardIntersectionTypes.ts, 57, 21))
 >beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 65, 23))
@@ -238,13 +238,11 @@ function beastFoo(beast: Object) {
 >hasLegs : Symbol(hasLegs, Decl(typeGuardIntersectionTypes.ts, 58, 39))
 >beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 100, 18))
 
-        beast // beast is Legged
+        beast;  // Winged & Legged
 >beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 100, 18))
-
-        // ideally, beast would be Winged && Legged here...
     }
     else {
-         beast
+        beast;
 >beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 100, 18))
     }
 
@@ -254,9 +252,7 @@ function beastFoo(beast: Object) {
 >hasWings : Symbol(hasWings, Decl(typeGuardIntersectionTypes.ts, 61, 83))
 >beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 100, 18))
 
-        beast // beast is Winged
+        beast;  // Legged & Winged
 >beast : Symbol(beast, Decl(typeGuardIntersectionTypes.ts, 100, 18))
-
-        // ideally, beast would be Legged && Winged here...
     }
 }
diff --git a/tests/baselines/reference/typeGuardIntersectionTypes.types b/tests/baselines/reference/typeGuardIntersectionTypes.types
index 4018036c5ce..5ce768d4a5e 100644
--- a/tests/baselines/reference/typeGuardIntersectionTypes.types
+++ b/tests/baselines/reference/typeGuardIntersectionTypes.types
@@ -201,7 +201,7 @@ function identifyBeast(beast: Beast) {
 >hasWings : (x: Beast) => x is Winged
 >beast : Legged
 
-            if (beast.legs === 4) { // ERROR TS2339: Property 'legs' does not exist on type 'Winged'.
+            if (beast.legs === 4) {
 >beast.legs === 4 : boolean
 >beast.legs : number
 >beast : Legged & Winged
@@ -213,7 +213,7 @@ function identifyBeast(beast: Beast) {
 >log : (s: string) => void
 >`pegasus - 4 legs, wings` : string
             }
-            else if (beast.legs === 2) { // ERROR TS2339...
+            else if (beast.legs === 2) {
 >beast.legs === 2 : boolean
 >beast.legs : number
 >beast : Legged & Winged
@@ -226,7 +226,7 @@ function identifyBeast(beast: Beast) {
 >`bird - 2 legs, wings` : string
             }
             else {
-                log(`unknown - ${beast.legs} legs, wings`); // ERROR TS2339...
+                log(`unknown - ${beast.legs} legs, wings`);
 >log(`unknown - ${beast.legs} legs, wings`) : void
 >log : (s: string) => void
 >`unknown - ${beast.legs} legs, wings` : string
@@ -283,13 +283,11 @@ function beastFoo(beast: Object) {
 >hasLegs : (x: Beast) => x is Legged
 >beast : Winged
 
-        beast // beast is Legged
+        beast;  // Winged & Legged
 >beast : Winged & Legged
-
-        // ideally, beast would be Winged && Legged here...
     }
     else {
-         beast
+        beast;
 >beast : Object
     }
 
@@ -302,9 +300,7 @@ function beastFoo(beast: Object) {
 >hasWings : (x: Beast) => x is Winged
 >beast : Legged
 
-        beast // beast is Winged
+        beast;  // Legged & Winged
 >beast : Legged & Winged
-
-        // ideally, beast would be Legged && Winged here...
     }
 }
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts
index efde587e5e5..d0a999acd1c 100644
--- a/tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts
+++ b/tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts
@@ -71,14 +71,14 @@ function identifyBeast(beast: Beast) {
 
         // All winged beasts with legs
         if (hasWings(beast)) {
-            if (beast.legs === 4) { // ERROR TS2339: Property 'legs' does not exist on type 'Winged'.
+            if (beast.legs === 4) {
                 log(`pegasus - 4 legs, wings`);
             }
-            else if (beast.legs === 2) { // ERROR TS2339...
+            else if (beast.legs === 2) {
                 log(`bird - 2 legs, wings`);
             }
             else {
-                log(`unknown - ${beast.legs} legs, wings`); // ERROR TS2339...
+                log(`unknown - ${beast.legs} legs, wings`);
             }
         }
 
@@ -101,15 +101,13 @@ function identifyBeast(beast: Beast) {
 
 function beastFoo(beast: Object) {
     if (hasWings(beast) && hasLegs(beast)) {
-        beast // beast is Legged
-        // ideally, beast would be Winged && Legged here...
+        beast;  // Winged & Legged
     }
     else {
-         beast
+        beast;
     }
 
     if (hasLegs(beast) && hasWings(beast)) {
-        beast // beast is Winged
-        // ideally, beast would be Legged && Winged here...
+        beast;  // Legged & Winged
     }
 }
\ No newline at end of file

From 8360bc7961a3e3a5052e7d608c2a1cbfddac226c Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Wed, 8 Jun 2016 16:43:56 -0700
Subject: [PATCH 217/332] Add handleing for classes

---
 src/compiler/emitter.ts                       | 12 ++++-
 .../reference/es6modulekindWithES5Target.js   | 51 +++++++++++++++++++
 .../es6modulekindWithES5Target.symbols        | 41 +++++++++++++++
 .../es6modulekindWithES5Target.types          | 45 ++++++++++++++++
 .../reference/es6modulekindWithES5Target2.js  | 19 +++++++
 .../es6modulekindWithES5Target2.symbols       | 15 ++++++
 .../es6modulekindWithES5Target2.types         | 17 +++++++
 .../reference/es6modulekindWithES5Target3.js  | 30 +++++++++++
 .../es6modulekindWithES5Target3.symbols       | 22 ++++++++
 .../es6modulekindWithES5Target3.types         | 24 +++++++++
 .../reference/es6modulekindWithES5Target4.js  | 12 +++++
 .../es6modulekindWithES5Target4.symbols       |  8 +++
 .../es6modulekindWithES5Target4.types         |  8 +++
 .../compiler/es6modulekindWithES5Target.ts    | 20 ++++++++
 .../compiler/es6modulekindWithES5Target2.ts   |  8 +++
 .../compiler/es6modulekindWithES5Target3.ts   | 12 +++++
 .../compiler/es6modulekindWithES5Target4.ts   |  5 ++
 17 files changed, 348 insertions(+), 1 deletion(-)
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target.js
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target.symbols
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target.types
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target2.js
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target2.symbols
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target2.types
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target3.js
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target3.symbols
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target3.types
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target4.js
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target4.symbols
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target4.types
 create mode 100644 tests/cases/compiler/es6modulekindWithES5Target.ts
 create mode 100644 tests/cases/compiler/es6modulekindWithES5Target2.ts
 create mode 100644 tests/cases/compiler/es6modulekindWithES5Target3.ts
 create mode 100644 tests/cases/compiler/es6modulekindWithES5Target4.ts

diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index f225b4cacf8..55b8656f5e8 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -5559,7 +5559,11 @@ const _super = (function (geti, seti) {
             }
 
             function emitClassLikeDeclarationBelowES6(node: ClassLikeDeclaration) {
+                const isES6ExportedClass = isES6ExportedDeclaration(node);
                 if (node.kind === SyntaxKind.ClassDeclaration) {
+                    if (isES6ExportedClass && !(node.flags & NodeFlags.Default)) {
+                        write("export ");
+                    }
                     // source file level classes in system modules are hoisted so 'var's for them are already defined
                     if (!shouldHoistDeclarationInSystemJsModule(node)) {
                         write("var ");
@@ -5629,9 +5633,15 @@ const _super = (function (geti, seti) {
                 }
                 emitEnd(node);
 
-                if (node.kind === SyntaxKind.ClassDeclaration) {
+                if (node.kind === SyntaxKind.ClassDeclaration && !isES6ExportedClass) {
                     emitExportMemberAssignment(<ClassDeclaration>node);
                 }
+                else if (isES6ExportedClass && (node.flags & NodeFlags.Default)) {
+                    writeLine();
+                    write("export default ");
+                    emitDeclarationName(node);
+                    write(";");
+                }
             }
 
             function emitClassMemberPrefix(node: ClassLikeDeclaration, member: Node) {
diff --git a/tests/baselines/reference/es6modulekindWithES5Target.js b/tests/baselines/reference/es6modulekindWithES5Target.js
new file mode 100644
index 00000000000..bab55ec7a2c
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target.js
@@ -0,0 +1,51 @@
+//// [es6modulekindWithES5Target.ts]
+
+export class C {
+    static s = 0;
+    p = 1;
+    method() { }
+}
+
+declare function foo(...args: any[]): any;
+@foo
+export class D {
+    static s = 0;
+    p = 1;
+    method() { }
+}
+
+class E { }
+export {E};
+
+//// [es6modulekindWithES5Target.js]
+var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+};
+export var C = (function () {
+    function C() {
+        this.p = 1;
+    }
+    C.prototype.method = function () { };
+    C.s = 0;
+    return C;
+}());
+export var D = (function () {
+    function D() {
+        this.p = 1;
+    }
+    D.prototype.method = function () { };
+    D.s = 0;
+    D = __decorate([
+        foo
+    ], D);
+    return D;
+}());
+var E = (function () {
+    function E() {
+    }
+    return E;
+}());
+export { E };
diff --git a/tests/baselines/reference/es6modulekindWithES5Target.symbols b/tests/baselines/reference/es6modulekindWithES5Target.symbols
new file mode 100644
index 00000000000..4fe53ced68d
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target.symbols
@@ -0,0 +1,41 @@
+=== tests/cases/compiler/es6modulekindWithES5Target.ts ===
+
+export class C {
+>C : Symbol(C, Decl(es6modulekindWithES5Target.ts, 0, 0))
+
+    static s = 0;
+>s : Symbol(C.s, Decl(es6modulekindWithES5Target.ts, 1, 16))
+
+    p = 1;
+>p : Symbol(C.p, Decl(es6modulekindWithES5Target.ts, 2, 17))
+
+    method() { }
+>method : Symbol(C.method, Decl(es6modulekindWithES5Target.ts, 3, 10))
+}
+
+declare function foo(...args: any[]): any;
+>foo : Symbol(foo, Decl(es6modulekindWithES5Target.ts, 5, 1))
+>args : Symbol(args, Decl(es6modulekindWithES5Target.ts, 7, 21))
+
+@foo
+>foo : Symbol(foo, Decl(es6modulekindWithES5Target.ts, 5, 1))
+
+export class D {
+>D : Symbol(D, Decl(es6modulekindWithES5Target.ts, 7, 42))
+
+    static s = 0;
+>s : Symbol(D.s, Decl(es6modulekindWithES5Target.ts, 9, 16))
+
+    p = 1;
+>p : Symbol(D.p, Decl(es6modulekindWithES5Target.ts, 10, 17))
+
+    method() { }
+>method : Symbol(D.method, Decl(es6modulekindWithES5Target.ts, 11, 10))
+}
+
+class E { }
+>E : Symbol(E, Decl(es6modulekindWithES5Target.ts, 13, 1))
+
+export {E};
+>E : Symbol(E, Decl(es6modulekindWithES5Target.ts, 16, 8))
+
diff --git a/tests/baselines/reference/es6modulekindWithES5Target.types b/tests/baselines/reference/es6modulekindWithES5Target.types
new file mode 100644
index 00000000000..14e0533faaa
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target.types
@@ -0,0 +1,45 @@
+=== tests/cases/compiler/es6modulekindWithES5Target.ts ===
+
+export class C {
+>C : C
+
+    static s = 0;
+>s : number
+>0 : number
+
+    p = 1;
+>p : number
+>1 : number
+
+    method() { }
+>method : () => void
+}
+
+declare function foo(...args: any[]): any;
+>foo : (...args: any[]) => any
+>args : any[]
+
+@foo
+>foo : (...args: any[]) => any
+
+export class D {
+>D : D
+
+    static s = 0;
+>s : number
+>0 : number
+
+    p = 1;
+>p : number
+>1 : number
+
+    method() { }
+>method : () => void
+}
+
+class E { }
+>E : E
+
+export {E};
+>E : typeof E
+
diff --git a/tests/baselines/reference/es6modulekindWithES5Target2.js b/tests/baselines/reference/es6modulekindWithES5Target2.js
new file mode 100644
index 00000000000..4cfe8bc6d4b
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target2.js
@@ -0,0 +1,19 @@
+//// [es6modulekindWithES5Target2.ts]
+
+export default class C {
+    static s = 0;
+    p = 1;
+    method() { }
+}
+
+
+//// [es6modulekindWithES5Target2.js]
+var C = (function () {
+    function C() {
+        this.p = 1;
+    }
+    C.prototype.method = function () { };
+    C.s = 0;
+    return C;
+}());
+export default C;
diff --git a/tests/baselines/reference/es6modulekindWithES5Target2.symbols b/tests/baselines/reference/es6modulekindWithES5Target2.symbols
new file mode 100644
index 00000000000..762121612eb
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target2.symbols
@@ -0,0 +1,15 @@
+=== tests/cases/compiler/es6modulekindWithES5Target2.ts ===
+
+export default class C {
+>C : Symbol(C, Decl(es6modulekindWithES5Target2.ts, 0, 0))
+
+    static s = 0;
+>s : Symbol(C.s, Decl(es6modulekindWithES5Target2.ts, 1, 24))
+
+    p = 1;
+>p : Symbol(C.p, Decl(es6modulekindWithES5Target2.ts, 2, 17))
+
+    method() { }
+>method : Symbol(C.method, Decl(es6modulekindWithES5Target2.ts, 3, 10))
+}
+
diff --git a/tests/baselines/reference/es6modulekindWithES5Target2.types b/tests/baselines/reference/es6modulekindWithES5Target2.types
new file mode 100644
index 00000000000..04b5e5b9905
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target2.types
@@ -0,0 +1,17 @@
+=== tests/cases/compiler/es6modulekindWithES5Target2.ts ===
+
+export default class C {
+>C : C
+
+    static s = 0;
+>s : number
+>0 : number
+
+    p = 1;
+>p : number
+>1 : number
+
+    method() { }
+>method : () => void
+}
+
diff --git a/tests/baselines/reference/es6modulekindWithES5Target3.js b/tests/baselines/reference/es6modulekindWithES5Target3.js
new file mode 100644
index 00000000000..bfe55d2a573
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target3.js
@@ -0,0 +1,30 @@
+//// [es6modulekindWithES5Target3.ts]
+
+
+declare function foo(...args: any[]): any;
+@foo
+export default class D {
+    static s = 0;
+    p = 1;
+    method() { }
+}
+
+//// [es6modulekindWithES5Target3.js]
+var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+};
+var D = (function () {
+    function D() {
+        this.p = 1;
+    }
+    D.prototype.method = function () { };
+    D.s = 0;
+    D = __decorate([
+        foo
+    ], D);
+    return D;
+}());
+export default D;
diff --git a/tests/baselines/reference/es6modulekindWithES5Target3.symbols b/tests/baselines/reference/es6modulekindWithES5Target3.symbols
new file mode 100644
index 00000000000..3fd26b9033f
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target3.symbols
@@ -0,0 +1,22 @@
+=== tests/cases/compiler/es6modulekindWithES5Target3.ts ===
+
+
+declare function foo(...args: any[]): any;
+>foo : Symbol(foo, Decl(es6modulekindWithES5Target3.ts, 0, 0))
+>args : Symbol(args, Decl(es6modulekindWithES5Target3.ts, 2, 21))
+
+@foo
+>foo : Symbol(foo, Decl(es6modulekindWithES5Target3.ts, 0, 0))
+
+export default class D {
+>D : Symbol(D, Decl(es6modulekindWithES5Target3.ts, 2, 42))
+
+    static s = 0;
+>s : Symbol(D.s, Decl(es6modulekindWithES5Target3.ts, 4, 24))
+
+    p = 1;
+>p : Symbol(D.p, Decl(es6modulekindWithES5Target3.ts, 5, 17))
+
+    method() { }
+>method : Symbol(D.method, Decl(es6modulekindWithES5Target3.ts, 6, 10))
+}
diff --git a/tests/baselines/reference/es6modulekindWithES5Target3.types b/tests/baselines/reference/es6modulekindWithES5Target3.types
new file mode 100644
index 00000000000..5bc8c69c01a
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target3.types
@@ -0,0 +1,24 @@
+=== tests/cases/compiler/es6modulekindWithES5Target3.ts ===
+
+
+declare function foo(...args: any[]): any;
+>foo : (...args: any[]) => any
+>args : any[]
+
+@foo
+>foo : (...args: any[]) => any
+
+export default class D {
+>D : D
+
+    static s = 0;
+>s : number
+>0 : number
+
+    p = 1;
+>p : number
+>1 : number
+
+    method() { }
+>method : () => void
+}
diff --git a/tests/baselines/reference/es6modulekindWithES5Target4.js b/tests/baselines/reference/es6modulekindWithES5Target4.js
new file mode 100644
index 00000000000..b34e68b8111
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target4.js
@@ -0,0 +1,12 @@
+//// [es6modulekindWithES5Target4.ts]
+
+class E { }
+export default E;
+
+//// [es6modulekindWithES5Target4.js]
+var E = (function () {
+    function E() {
+    }
+    return E;
+}());
+export default E;
diff --git a/tests/baselines/reference/es6modulekindWithES5Target4.symbols b/tests/baselines/reference/es6modulekindWithES5Target4.symbols
new file mode 100644
index 00000000000..fdf5bdc6197
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target4.symbols
@@ -0,0 +1,8 @@
+=== tests/cases/compiler/es6modulekindWithES5Target4.ts ===
+
+class E { }
+>E : Symbol(E, Decl(es6modulekindWithES5Target4.ts, 0, 0))
+
+export default E;
+>E : Symbol(E, Decl(es6modulekindWithES5Target4.ts, 0, 0))
+
diff --git a/tests/baselines/reference/es6modulekindWithES5Target4.types b/tests/baselines/reference/es6modulekindWithES5Target4.types
new file mode 100644
index 00000000000..cd0852cab1a
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target4.types
@@ -0,0 +1,8 @@
+=== tests/cases/compiler/es6modulekindWithES5Target4.ts ===
+
+class E { }
+>E : E
+
+export default E;
+>E : E
+
diff --git a/tests/cases/compiler/es6modulekindWithES5Target.ts b/tests/cases/compiler/es6modulekindWithES5Target.ts
new file mode 100644
index 00000000000..72117932229
--- /dev/null
+++ b/tests/cases/compiler/es6modulekindWithES5Target.ts
@@ -0,0 +1,20 @@
+// @target: es5
+// @module: es2015
+// @experimentalDecorators: true
+
+export class C {
+    static s = 0;
+    p = 1;
+    method() { }
+}
+
+declare function foo(...args: any[]): any;
+@foo
+export class D {
+    static s = 0;
+    p = 1;
+    method() { }
+}
+
+class E { }
+export {E};
\ No newline at end of file
diff --git a/tests/cases/compiler/es6modulekindWithES5Target2.ts b/tests/cases/compiler/es6modulekindWithES5Target2.ts
new file mode 100644
index 00000000000..01f32fd0da0
--- /dev/null
+++ b/tests/cases/compiler/es6modulekindWithES5Target2.ts
@@ -0,0 +1,8 @@
+// @target: es5
+// @module: es2015
+
+export default class C {
+    static s = 0;
+    p = 1;
+    method() { }
+}
diff --git a/tests/cases/compiler/es6modulekindWithES5Target3.ts b/tests/cases/compiler/es6modulekindWithES5Target3.ts
new file mode 100644
index 00000000000..af407271685
--- /dev/null
+++ b/tests/cases/compiler/es6modulekindWithES5Target3.ts
@@ -0,0 +1,12 @@
+// @target: es5
+// @module: es2015
+// @experimentalDecorators: true
+
+
+declare function foo(...args: any[]): any;
+@foo
+export default class D {
+    static s = 0;
+    p = 1;
+    method() { }
+}
\ No newline at end of file
diff --git a/tests/cases/compiler/es6modulekindWithES5Target4.ts b/tests/cases/compiler/es6modulekindWithES5Target4.ts
new file mode 100644
index 00000000000..709dd791fb4
--- /dev/null
+++ b/tests/cases/compiler/es6modulekindWithES5Target4.ts
@@ -0,0 +1,5 @@
+// @target: es5
+// @module: es2015
+
+class E { }
+export default E;
\ No newline at end of file

From 33137f68c57e95cfa4bc1354232281544a857aec Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Wed, 8 Jun 2016 16:46:55 -0700
Subject: [PATCH 218/332] Add more tests for target=es5 module=es6

---
 .../reference/es6modulekindWithES5Target5.js  | 19 ++++++++++++++
 .../es6modulekindWithES5Target5.symbols       | 15 +++++++++++
 .../es6modulekindWithES5Target5.types         | 15 +++++++++++
 .../reference/es6modulekindWithES5Target6.js  | 25 +++++++++++++++++++
 .../es6modulekindWithES5Target6.symbols       | 17 +++++++++++++
 .../es6modulekindWithES5Target6.types         | 19 ++++++++++++++
 .../reference/es6modulekindWithES5Target7.js  | 16 ++++++++++++
 .../es6modulekindWithES5Target7.symbols       | 16 ++++++++++++
 .../es6modulekindWithES5Target7.types         | 17 +++++++++++++
 .../reference/es6modulekindWithES5Target8.js  |  8 ++++++
 .../es6modulekindWithES5Target8.symbols       |  8 ++++++
 .../es6modulekindWithES5Target8.types         | 10 ++++++++
 .../compiler/es6modulekindWithES5Target5.ts   | 11 ++++++++
 .../compiler/es6modulekindWithES5Target6.ts   | 11 ++++++++
 .../compiler/es6modulekindWithES5Target7.ts   | 10 ++++++++
 .../compiler/es6modulekindWithES5Target8.ts   |  5 ++++
 16 files changed, 222 insertions(+)
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target5.js
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target5.symbols
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target5.types
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target6.js
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target6.symbols
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target6.types
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target7.js
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target7.symbols
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target7.types
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target8.js
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target8.symbols
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target8.types
 create mode 100644 tests/cases/compiler/es6modulekindWithES5Target5.ts
 create mode 100644 tests/cases/compiler/es6modulekindWithES5Target6.ts
 create mode 100644 tests/cases/compiler/es6modulekindWithES5Target7.ts
 create mode 100644 tests/cases/compiler/es6modulekindWithES5Target8.ts

diff --git a/tests/baselines/reference/es6modulekindWithES5Target5.js b/tests/baselines/reference/es6modulekindWithES5Target5.js
new file mode 100644
index 00000000000..73560486183
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target5.js
@@ -0,0 +1,19 @@
+//// [es6modulekindWithES5Target5.ts]
+
+export enum E1 {
+    value1
+}
+
+export const enum E2 {
+    value1
+}
+
+//// [es6modulekindWithES5Target5.js]
+export var E1;
+(function (E1) {
+    E1[E1["value1"] = 0] = "value1";
+})(E1 || (E1 = {}));
+export var E2;
+(function (E2) {
+    E2[E2["value1"] = 0] = "value1";
+})(E2 || (E2 = {}));
diff --git a/tests/baselines/reference/es6modulekindWithES5Target5.symbols b/tests/baselines/reference/es6modulekindWithES5Target5.symbols
new file mode 100644
index 00000000000..5a305ad0f7f
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target5.symbols
@@ -0,0 +1,15 @@
+=== tests/cases/compiler/es6modulekindWithES5Target5.ts ===
+
+export enum E1 {
+>E1 : Symbol(E1, Decl(es6modulekindWithES5Target5.ts, 0, 0))
+
+    value1
+>value1 : Symbol(E1.value1, Decl(es6modulekindWithES5Target5.ts, 1, 16))
+}
+
+export const enum E2 {
+>E2 : Symbol(E2, Decl(es6modulekindWithES5Target5.ts, 3, 1))
+
+    value1
+>value1 : Symbol(E2.value1, Decl(es6modulekindWithES5Target5.ts, 5, 22))
+}
diff --git a/tests/baselines/reference/es6modulekindWithES5Target5.types b/tests/baselines/reference/es6modulekindWithES5Target5.types
new file mode 100644
index 00000000000..284c72cc0ea
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target5.types
@@ -0,0 +1,15 @@
+=== tests/cases/compiler/es6modulekindWithES5Target5.ts ===
+
+export enum E1 {
+>E1 : E1
+
+    value1
+>value1 : E1
+}
+
+export const enum E2 {
+>E2 : E2
+
+    value1
+>value1 : E2
+}
diff --git a/tests/baselines/reference/es6modulekindWithES5Target6.js b/tests/baselines/reference/es6modulekindWithES5Target6.js
new file mode 100644
index 00000000000..d305c60e54e
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target6.js
@@ -0,0 +1,25 @@
+//// [es6modulekindWithES5Target6.ts]
+
+export function f1(d = 0) {
+}
+
+export function f2(...arg) {
+}
+
+export default function f3(d = 0) {
+}
+
+
+//// [es6modulekindWithES5Target6.js]
+export function f1(d) {
+    if (d === void 0) { d = 0; }
+}
+export function f2() {
+    var arg = [];
+    for (var _i = 0; _i < arguments.length; _i++) {
+        arg[_i - 0] = arguments[_i];
+    }
+}
+export default function f3(d) {
+    if (d === void 0) { d = 0; }
+}
diff --git a/tests/baselines/reference/es6modulekindWithES5Target6.symbols b/tests/baselines/reference/es6modulekindWithES5Target6.symbols
new file mode 100644
index 00000000000..6e779355f3d
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target6.symbols
@@ -0,0 +1,17 @@
+=== tests/cases/compiler/es6modulekindWithES5Target6.ts ===
+
+export function f1(d = 0) {
+>f1 : Symbol(f1, Decl(es6modulekindWithES5Target6.ts, 0, 0))
+>d : Symbol(d, Decl(es6modulekindWithES5Target6.ts, 1, 19))
+}
+
+export function f2(...arg) {
+>f2 : Symbol(f2, Decl(es6modulekindWithES5Target6.ts, 2, 1))
+>arg : Symbol(arg, Decl(es6modulekindWithES5Target6.ts, 4, 19))
+}
+
+export default function f3(d = 0) {
+>f3 : Symbol(f3, Decl(es6modulekindWithES5Target6.ts, 5, 1))
+>d : Symbol(d, Decl(es6modulekindWithES5Target6.ts, 7, 27))
+}
+
diff --git a/tests/baselines/reference/es6modulekindWithES5Target6.types b/tests/baselines/reference/es6modulekindWithES5Target6.types
new file mode 100644
index 00000000000..932493ef063
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target6.types
@@ -0,0 +1,19 @@
+=== tests/cases/compiler/es6modulekindWithES5Target6.ts ===
+
+export function f1(d = 0) {
+>f1 : (d?: number) => void
+>d : number
+>0 : number
+}
+
+export function f2(...arg) {
+>f2 : (...arg: any[]) => void
+>arg : any[]
+}
+
+export default function f3(d = 0) {
+>f3 : (d?: number) => void
+>d : number
+>0 : number
+}
+
diff --git a/tests/baselines/reference/es6modulekindWithES5Target7.js b/tests/baselines/reference/es6modulekindWithES5Target7.js
new file mode 100644
index 00000000000..e3e0b4f4549
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target7.js
@@ -0,0 +1,16 @@
+//// [es6modulekindWithES5Target7.ts]
+
+export namespace N {
+    var x = 0;
+}
+
+export namespace N2 {
+    export interface I { }
+}
+
+
+//// [es6modulekindWithES5Target7.js]
+export var N;
+(function (N) {
+    var x = 0;
+})(N || (N = {}));
diff --git a/tests/baselines/reference/es6modulekindWithES5Target7.symbols b/tests/baselines/reference/es6modulekindWithES5Target7.symbols
new file mode 100644
index 00000000000..4bf587dd5d3
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target7.symbols
@@ -0,0 +1,16 @@
+=== tests/cases/compiler/es6modulekindWithES5Target7.ts ===
+
+export namespace N {
+>N : Symbol(N, Decl(es6modulekindWithES5Target7.ts, 0, 0))
+
+    var x = 0;
+>x : Symbol(x, Decl(es6modulekindWithES5Target7.ts, 2, 7))
+}
+
+export namespace N2 {
+>N2 : Symbol(N2, Decl(es6modulekindWithES5Target7.ts, 3, 1))
+
+    export interface I { }
+>I : Symbol(I, Decl(es6modulekindWithES5Target7.ts, 5, 21))
+}
+
diff --git a/tests/baselines/reference/es6modulekindWithES5Target7.types b/tests/baselines/reference/es6modulekindWithES5Target7.types
new file mode 100644
index 00000000000..f1404c7883a
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target7.types
@@ -0,0 +1,17 @@
+=== tests/cases/compiler/es6modulekindWithES5Target7.ts ===
+
+export namespace N {
+>N : typeof N
+
+    var x = 0;
+>x : number
+>0 : number
+}
+
+export namespace N2 {
+>N2 : any
+
+    export interface I { }
+>I : I
+}
+
diff --git a/tests/baselines/reference/es6modulekindWithES5Target8.js b/tests/baselines/reference/es6modulekindWithES5Target8.js
new file mode 100644
index 00000000000..baab6fdab37
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target8.js
@@ -0,0 +1,8 @@
+//// [es6modulekindWithES5Target8.ts]
+
+export const c = 0;
+export let l = 1;
+
+//// [es6modulekindWithES5Target8.js]
+export var c = 0;
+export var l = 1;
diff --git a/tests/baselines/reference/es6modulekindWithES5Target8.symbols b/tests/baselines/reference/es6modulekindWithES5Target8.symbols
new file mode 100644
index 00000000000..e85c76a16fe
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target8.symbols
@@ -0,0 +1,8 @@
+=== tests/cases/compiler/es6modulekindWithES5Target8.ts ===
+
+export const c = 0;
+>c : Symbol(c, Decl(es6modulekindWithES5Target8.ts, 1, 12))
+
+export let l = 1;
+>l : Symbol(l, Decl(es6modulekindWithES5Target8.ts, 2, 10))
+
diff --git a/tests/baselines/reference/es6modulekindWithES5Target8.types b/tests/baselines/reference/es6modulekindWithES5Target8.types
new file mode 100644
index 00000000000..4017b02a471
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target8.types
@@ -0,0 +1,10 @@
+=== tests/cases/compiler/es6modulekindWithES5Target8.ts ===
+
+export const c = 0;
+>c : number
+>0 : number
+
+export let l = 1;
+>l : number
+>1 : number
+
diff --git a/tests/cases/compiler/es6modulekindWithES5Target5.ts b/tests/cases/compiler/es6modulekindWithES5Target5.ts
new file mode 100644
index 00000000000..0fb21bba489
--- /dev/null
+++ b/tests/cases/compiler/es6modulekindWithES5Target5.ts
@@ -0,0 +1,11 @@
+// @target: es5
+// @module: es2015
+// @preserveConstEnums: true
+
+export enum E1 {
+    value1
+}
+
+export const enum E2 {
+    value1
+}
\ No newline at end of file
diff --git a/tests/cases/compiler/es6modulekindWithES5Target6.ts b/tests/cases/compiler/es6modulekindWithES5Target6.ts
new file mode 100644
index 00000000000..713cfe7a9f9
--- /dev/null
+++ b/tests/cases/compiler/es6modulekindWithES5Target6.ts
@@ -0,0 +1,11 @@
+// @target: es5
+// @module: es2015
+
+export function f1(d = 0) {
+}
+
+export function f2(...arg) {
+}
+
+export default function f3(d = 0) {
+}
diff --git a/tests/cases/compiler/es6modulekindWithES5Target7.ts b/tests/cases/compiler/es6modulekindWithES5Target7.ts
new file mode 100644
index 00000000000..f2441c018c2
--- /dev/null
+++ b/tests/cases/compiler/es6modulekindWithES5Target7.ts
@@ -0,0 +1,10 @@
+// @target: es5
+// @module: es2015
+
+export namespace N {
+    var x = 0;
+}
+
+export namespace N2 {
+    export interface I { }
+}
diff --git a/tests/cases/compiler/es6modulekindWithES5Target8.ts b/tests/cases/compiler/es6modulekindWithES5Target8.ts
new file mode 100644
index 00000000000..f3290ed0563
--- /dev/null
+++ b/tests/cases/compiler/es6modulekindWithES5Target8.ts
@@ -0,0 +1,5 @@
+// @target: es5
+// @module: es2015
+
+export const c = 0;
+export let l = 1;
\ No newline at end of file

From 64468278864b466c9d29fb2638fc889d4e9d7ed0 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Wed, 8 Jun 2016 16:54:24 -0700
Subject: [PATCH 219/332] addExportToArgumentListKind

---
 src/services/signatureHelp.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/services/signatureHelp.ts b/src/services/signatureHelp.ts
index 34c4ad5062a..b5df2b5af20 100644
--- a/src/services/signatureHelp.ts
+++ b/src/services/signatureHelp.ts
@@ -165,7 +165,7 @@ namespace ts.SignatureHelp {
 
     const emptyArray: any[] = [];
 
-    const enum ArgumentListKind {
+    export const enum ArgumentListKind {
         TypeArguments,
         CallArguments,
         TaggedTemplateArguments

From f42d8b88d560e3945ca7c576d660c5f9de539bce Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Wed, 8 Jun 2016 17:29:45 -0700
Subject: [PATCH 220/332] Accept baseline

---
 tests/baselines/reference/es5andes6module.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/baselines/reference/es5andes6module.js b/tests/baselines/reference/es5andes6module.js
index a6ca59befbf..ae8c0ad87e2 100644
--- a/tests/baselines/reference/es5andes6module.js
+++ b/tests/baselines/reference/es5andes6module.js
@@ -23,4 +23,4 @@ var A = (function () {
     };
     return A;
 }());
-exports.default = A;
+export default A;

From 475c1c24fc4e380de0b585da0a2608989976aa91 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Wed, 8 Jun 2016 17:48:37 -0700
Subject: [PATCH 221/332] Add more tests

---
 .../es6modulekindWithES5Target10.errors.txt   | 19 +++++++++++
 .../reference/es6modulekindWithES5Target10.js | 10 ++++++
 .../es6modulekindWithES5Target9.errors.txt    | 33 +++++++++++++++++++
 .../reference/es6modulekindWithES5Target9.js  | 24 ++++++++++++++
 .../es6modulekindWithES5Target9.symbols       | 12 +++++++
 .../es6modulekindWithES5Target9.types         | 18 ++++++++++
 .../compiler/es6modulekindWithES5Target10.ts  |  9 +++++
 .../compiler/es6modulekindWithES5Target9.ts   | 16 +++++++++
 8 files changed, 141 insertions(+)
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target10.errors.txt
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target10.js
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target9.errors.txt
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target9.js
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target9.symbols
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target9.types
 create mode 100644 tests/cases/compiler/es6modulekindWithES5Target10.ts
 create mode 100644 tests/cases/compiler/es6modulekindWithES5Target9.ts

diff --git a/tests/baselines/reference/es6modulekindWithES5Target10.errors.txt b/tests/baselines/reference/es6modulekindWithES5Target10.errors.txt
new file mode 100644
index 00000000000..efa4cd87e43
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target10.errors.txt
@@ -0,0 +1,19 @@
+tests/cases/compiler/es6modulekindWithES5Target10.ts(2,1): error TS1202: Import assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
+tests/cases/compiler/es6modulekindWithES5Target10.ts(2,20): error TS2307: Cannot find module 'mod'.
+tests/cases/compiler/es6modulekindWithES5Target10.ts(7,1): error TS1203: Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead.
+
+
+==== tests/cases/compiler/es6modulekindWithES5Target10.ts (3 errors) ====
+    
+    import i = require("mod"); // Error;
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~
+!!! error TS1202: Import assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
+                       ~~~~~
+!!! error TS2307: Cannot find module 'mod'.
+    
+    
+    namespace N {
+    }
+    export = N; // Error
+    ~~~~~~~~~~~
+!!! error TS1203: Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead.
\ No newline at end of file
diff --git a/tests/baselines/reference/es6modulekindWithES5Target10.js b/tests/baselines/reference/es6modulekindWithES5Target10.js
new file mode 100644
index 00000000000..b8a66241780
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target10.js
@@ -0,0 +1,10 @@
+//// [es6modulekindWithES5Target10.ts]
+
+import i = require("mod"); // Error;
+
+
+namespace N {
+}
+export = N; // Error
+
+//// [es6modulekindWithES5Target10.js]
diff --git a/tests/baselines/reference/es6modulekindWithES5Target9.errors.txt b/tests/baselines/reference/es6modulekindWithES5Target9.errors.txt
new file mode 100644
index 00000000000..696b28a30e8
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target9.errors.txt
@@ -0,0 +1,33 @@
+tests/cases/compiler/es6modulekindWithES5Target9.ts(2,15): error TS2307: Cannot find module 'mod'.
+tests/cases/compiler/es6modulekindWithES5Target9.ts(4,17): error TS2307: Cannot find module 'mod'.
+tests/cases/compiler/es6modulekindWithES5Target9.ts(6,20): error TS2307: Cannot find module 'mod'.
+tests/cases/compiler/es6modulekindWithES5Target9.ts(10,15): error TS2307: Cannot find module 'mod'.
+tests/cases/compiler/es6modulekindWithES5Target9.ts(12,17): error TS2307: Cannot find module 'mod'.
+
+
+==== tests/cases/compiler/es6modulekindWithES5Target9.ts (5 errors) ====
+    
+    import d from "mod";
+                  ~~~~~
+!!! error TS2307: Cannot find module 'mod'.
+    
+    import {a} from "mod";
+                    ~~~~~
+!!! error TS2307: Cannot find module 'mod'.
+    
+    import * as M from "mod";
+                       ~~~~~
+!!! error TS2307: Cannot find module 'mod'.
+    
+    export {a};
+    
+    export * from "mod";
+                  ~~~~~
+!!! error TS2307: Cannot find module 'mod'.
+    
+    export {b} from "mod"
+                    ~~~~~
+!!! error TS2307: Cannot find module 'mod'.
+    
+    export default d;
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/es6modulekindWithES5Target9.js b/tests/baselines/reference/es6modulekindWithES5Target9.js
new file mode 100644
index 00000000000..a9569c42dd9
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target9.js
@@ -0,0 +1,24 @@
+//// [es6modulekindWithES5Target9.ts]
+
+import d from "mod";
+
+import {a} from "mod";
+
+import * as M from "mod";
+
+export {a};
+
+export * from "mod";
+
+export {b} from "mod"
+
+export default d;
+
+
+//// [es6modulekindWithES5Target9.js]
+import d from "mod";
+import { a } from "mod";
+export { a };
+export * from "mod";
+export { b } from "mod";
+export default d;
diff --git a/tests/baselines/reference/es6modulekindWithES5Target9.symbols b/tests/baselines/reference/es6modulekindWithES5Target9.symbols
new file mode 100644
index 00000000000..c973b542d45
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target9.symbols
@@ -0,0 +1,12 @@
+=== tests/cases/compiler/es6modulekindWithES5Target9.ts ===
+
+export var {a, b } = { a: 0, b: 1 };
+>a : Symbol(a, Decl(es6modulekindWithES5Target9.ts, 1, 12))
+>b : Symbol(b, Decl(es6modulekindWithES5Target9.ts, 1, 14))
+>a : Symbol(a, Decl(es6modulekindWithES5Target9.ts, 1, 22))
+>b : Symbol(b, Decl(es6modulekindWithES5Target9.ts, 1, 28))
+
+export var [d, e] = [1, 2];
+>d : Symbol(d, Decl(es6modulekindWithES5Target9.ts, 2, 12))
+>e : Symbol(e, Decl(es6modulekindWithES5Target9.ts, 2, 14))
+
diff --git a/tests/baselines/reference/es6modulekindWithES5Target9.types b/tests/baselines/reference/es6modulekindWithES5Target9.types
new file mode 100644
index 00000000000..bd4eb2ea102
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target9.types
@@ -0,0 +1,18 @@
+=== tests/cases/compiler/es6modulekindWithES5Target9.ts ===
+
+export var {a, b } = { a: 0, b: 1 };
+>a : number
+>b : number
+>{ a: 0, b: 1 } : { a: number; b: number; }
+>a : number
+>0 : number
+>b : number
+>1 : number
+
+export var [d, e] = [1, 2];
+>d : number
+>e : number
+>[1, 2] : [number, number]
+>1 : number
+>2 : number
+
diff --git a/tests/cases/compiler/es6modulekindWithES5Target10.ts b/tests/cases/compiler/es6modulekindWithES5Target10.ts
new file mode 100644
index 00000000000..21105ecbbfc
--- /dev/null
+++ b/tests/cases/compiler/es6modulekindWithES5Target10.ts
@@ -0,0 +1,9 @@
+// @target: es5
+// @module: es2015
+
+import i = require("mod"); // Error;
+
+
+namespace N {
+}
+export = N; // Error
\ No newline at end of file
diff --git a/tests/cases/compiler/es6modulekindWithES5Target9.ts b/tests/cases/compiler/es6modulekindWithES5Target9.ts
new file mode 100644
index 00000000000..e0f7b612c08
--- /dev/null
+++ b/tests/cases/compiler/es6modulekindWithES5Target9.ts
@@ -0,0 +1,16 @@
+// @target: es5
+// @module: es2015
+
+import d from "mod";
+
+import {a} from "mod";
+
+import * as M from "mod";
+
+export {a};
+
+export * from "mod";
+
+export {b} from "mod"
+
+export default d;

From 19baf1f38ab3cbf9ec463d932f86fd7c2ee693df Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Wed, 8 Jun 2016 18:09:36 -0700
Subject: [PATCH 222/332] Adds progress indicators to the runtests-parallel
 build task.

---
 Jakefile.js                    |  48 +----
 scripts/mocha-none-reporter.js |  26 +++
 scripts/mocha-parallel.js      | 367 +++++++++++++++++++++++++++++++++
 3 files changed, 404 insertions(+), 37 deletions(-)
 create mode 100644 scripts/mocha-none-reporter.js
 create mode 100644 scripts/mocha-parallel.js

diff --git a/Jakefile.js b/Jakefile.js
index a449dfcfa98..3b75dfb6adf 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -5,6 +5,7 @@ var os = require("os");
 var path = require("path");
 var child_process = require("child_process");
 var Linter = require("tslint");
+var runTestsInParallel = require("./scripts/mocha-parallel").runTestsInParallel;
 
 // Variables
 var compilerDirectory = "src/compiler/";
@@ -683,7 +684,6 @@ function cleanTestDirs() {
 // used to pass data from jake command line directly to run.js
 function writeTestConfigFile(tests, light, taskConfigsFolder, workerCount) {
     var testConfigContents = JSON.stringify({ test: tests ? [tests] : undefined, light: light, workerCount: workerCount, taskConfigsFolder: taskConfigsFolder });
-    console.log('Running tests with config: ' + testConfigContents);
     fs.writeFileSync('test.config', testConfigContents);
 }
 
@@ -744,42 +744,16 @@ function runConsoleTests(defaultReporter, runInParallel) {
 
     }
     else {
-        // run task to load all tests and partition them between workers
-        var cmd = "mocha " + " -R min " + colors + run;
-        console.log(cmd);
-        exec(cmd, function() {
-            // read all configuration files and spawn a worker for every config
-            var configFiles = fs.readdirSync(taskConfigsFolder);
-            var counter = configFiles.length;
-            var firstErrorStatus;
-            // schedule work for chunks
-            configFiles.forEach(function (f) {
-                var configPath = path.join(taskConfigsFolder, f);
-                var workerCmd = "mocha" + " -t " + testTimeout + " -R " + reporter + " " + colors + " " + run + " --config='" + configPath + "'";
-                console.log(workerCmd);
-                exec(workerCmd,  finishWorker, finishWorker)
-            });
-
-            function finishWorker(e, errorStatus) {
-                counter--;
-                if (firstErrorStatus === undefined && errorStatus !== undefined) {
-                    firstErrorStatus = errorStatus;
-                }
-                if (counter !== 0) {
-                    complete();
-                }
-                else {
-                    // last worker clean everything and runs linter in case if there were no errors
-                    deleteTemporaryProjectOutput();
-                    jake.rmRf(taskConfigsFolder);
-                    if (firstErrorStatus === undefined) {
-                        runLinter();
-                        complete();
-                    }
-                    else {
-                        failWithStatus(firstErrorStatus);
-                    }
-                }
+        runTestsInParallel(taskConfigsFolder, run, { testTimeout: testTimeout, noColors: colors === " --no-colors " }, function (err) {
+            // last worker clean everything and runs linter in case if there were no errors
+            deleteTemporaryProjectOutput();
+            jake.rmRf(taskConfigsFolder);
+            if (err) {
+                fail(err);
+            }
+            else {
+                runLinter();
+                complete();
             }
         });
     }
diff --git a/scripts/mocha-none-reporter.js b/scripts/mocha-none-reporter.js
new file mode 100644
index 00000000000..5787b0c042e
--- /dev/null
+++ b/scripts/mocha-none-reporter.js
@@ -0,0 +1,26 @@
+/**
+ * Module dependencies.
+ */
+
+var Base = require('mocha').reporters.Base;
+
+/**
+ * Expose `None`.
+ */
+
+exports = module.exports = None;
+
+/**
+ * Initialize a new `None` test reporter.
+ *
+ * @api public
+ * @param {Runner} runner
+ */
+function None(runner) {
+  Base.call(this);
+}
+
+/**
+ * Inherit from `Base.prototype`.
+ */
+None.prototype.__proto__ = Base.prototype;
diff --git a/scripts/mocha-parallel.js b/scripts/mocha-parallel.js
new file mode 100644
index 00000000000..adba8ebf57c
--- /dev/null
+++ b/scripts/mocha-parallel.js
@@ -0,0 +1,367 @@
+var tty = require("tty")
+  , readline = require("readline")
+  , fs = require("fs")
+  , path = require("path")
+  , child_process = require("child_process")
+  , os = require("os")
+  , mocha = require("mocha")
+  , Base = mocha.reporters.Base
+  , color = Base.color
+  , cursor = Base.cursor
+  , ms = require("mocha/lib/ms");
+
+var isatty = tty.isatty(1) && tty.isatty(2);
+var tapRangePattern = /^(\d+)\.\.(\d+)(?:$|\r\n?|\n)/;
+var tapTestPattern = /^(not\sok|ok)\s+(\d+)\s+(?:-\s+)?(.*)$/;
+var tapCommentPattern = /^#(?: (tests|pass|fail) (\d+)$)?/;
+
+exports.runTestsInParallel = runTestsInParallel;
+exports.ProgressBars = ProgressBars;
+
+function runTestsInParallel(taskConfigsFolder, run, options, cb) {
+    if (options === undefined) options = { };
+
+    return discoverTests(run, options, function (error) {
+        if (error) {
+            return cb(error);
+        }
+
+        return runTests(taskConfigsFolder, run, options, cb);
+    });
+}
+
+function discoverTests(run, options, cb) {
+    console.log("Discovering tests...");
+
+    var cmd = "mocha -R " + require.resolve("./mocha-none-reporter.js") + " " + run;
+    var p = child_process.spawn(
+        process.platform === "win32" ? "cmd" : "/bin/sh",
+        process.platform === "win32" ? ["/c", cmd] : ["-c", cmd], {
+            windowsVerbatimArguments: true,
+            env: { NODE_ENV: "development" }
+        });
+
+    p.on("exit", function (status) {
+        if (status) {
+            cb(new Error("Process exited width code " + status));
+        }
+        else {
+            cb();
+        }
+    });
+}
+
+function runTests(taskConfigsFolder, run, options, cb) {
+    var configFiles = fs.readdirSync(taskConfigsFolder);
+    var numPartitions = configFiles.length;
+    if (numPartitions <= 0) {
+        cb();
+        return;
+    }
+
+    console.log("Running tests on " + numPartitions + " threads...");
+
+    var partitions = Array(numPartitions);
+    var progressBars = new ProgressBars();
+    progressBars.enable();
+
+    var counter = numPartitions;
+    configFiles.forEach(runTestsInPartition);
+
+    function runTestsInPartition(file, index) {
+        var partition = {
+            file: path.join(taskConfigsFolder, file),
+            tests: 0,
+            passed: 0,
+            failed: 0,
+            completed: 0,
+            current: undefined,
+            start: undefined,
+            end: undefined,
+            failures: []
+        };
+        partitions[index] = partition;
+
+        // Set up the progress bar.
+        updateProgress(0);
+
+        // Start the background process.
+        var cmd = "mocha -t " + (options.testTimeout || 20000) + " -R tap --no-colors " + run + " --config='" + partition.file + "'";
+        var p = child_process.spawn(
+            process.platform === "win32" ? "cmd" : "/bin/sh",
+            process.platform === "win32" ? ["/c", cmd] : ["-c", cmd], {
+                windowsVerbatimArguments: true,
+                env: { NODE_ENV: "development" }
+            });
+
+        var rl = readline.createInterface({
+            input: p.stdout,
+            terminal: false
+        });
+
+        rl.on("line", onmessage);
+        p.on("exit", onexit)
+
+        function onmessage(line) {
+            if (partition.start === undefined) {
+                partition.start = Date.now();
+            }
+
+            var rangeMatch = tapRangePattern.exec(line);
+            if (rangeMatch) {
+                partition.tests = parseInt(rangeMatch[2]);
+                return;
+            }
+
+            var testMatch = tapTestPattern.exec(line);
+            if (testMatch) {
+                var test = {
+                    result: testMatch[1],
+                    id: parseInt(testMatch[2]),
+                    name: testMatch[3],
+                    output: []
+                };
+
+                partition.current = test;
+                partition.completed++;
+
+                if (test.result === "ok") {
+                    partition.passed++;
+                }
+                else {
+                    partition.failed++;
+                    partition.failures.push(test);
+                }
+
+                var progress = partition.completed / partition.tests;
+                if (progress < 1) {
+                    updateProgress(progress);
+                }
+
+                return;
+            }
+
+            var commentMatch = tapCommentPattern.exec(line);
+            if (commentMatch) {
+                switch (commentMatch[1]) {
+                    case "tests":
+                        partition.current = undefined;
+                        partition.tests = parseInt(commentMatch[2]);
+                        break;
+
+                    case "pass":
+                        partition.passed = parseInt(commentMatch[2]);
+                        break;
+
+                    case "fail":
+                        partition.failed = parseInt(commentMatch[2]);
+                        break;
+                }
+
+                return;
+            }
+
+            if (partition.current) {
+                partition.current.output.push(line);
+            }
+        }
+
+        function onexit() {
+            if (partition.end === undefined) {
+                partition.end = Date.now();
+            }
+
+            partition.duration = partition.end - partition.start;
+            var summaryColor = partition.failed ? "fail" : "green";
+            var summarySymbol = partition.failed ? Base.symbols.err : Base.symbols.ok;
+            var summaryTests = (partition.passed === partition.tests ? partition.passed : partition.passed + "/" + partition.tests) + " passing";
+            var summaryDuration = "(" + ms(partition.duration) + ")";
+            var savedUseColors = Base.useColors;
+            Base.useColors = !options.noColors;
+
+            var summary = color(summaryColor, summarySymbol + " " + summaryTests) + " " + color("light", summaryDuration);
+            Base.useColors = savedUseColors;
+
+            updateProgress(1, summary);
+
+            signal();
+        }
+
+        function updateProgress(percentComplete, title) {
+            var progressColor = "pending";
+            if (partition.failed) {
+                progressColor = "fail";
+            }
+
+            progressBars.update(
+                index,
+                percentComplete,
+                progressColor,
+                title
+            );
+        }
+    }
+
+    function signal() {
+        counter--;
+
+        if (counter <= 0) {
+            var failed = 0;
+            var reporter = new Base(),
+                stats = reporter.stats,
+                failures = reporter.failures;
+
+            var duration = 0;
+            for (var i = 0; i < numPartitions; i++) {
+                var partition = partitions[i];
+                stats.passes += partition.passed;
+                stats.failures += partition.failed;
+                stats.tests += partition.tests;
+                duration += partition.duration;
+                for (var j = 0; j < partition.failures.length; j++) {
+                    var failure = partition.failures[j];
+                    failures.push(makeMochaTest(failure));
+                }
+            }
+
+            stats.duration = duration;
+            progressBars.disable();
+
+            if (options.noColors) {
+                var savedUseColors = Base.useColors;
+                Base.useColors = false;
+                reporter.epilogue();
+                Base.useColors = savedUseColors;
+            }
+            else {
+                reporter.epilogue();
+            }
+
+            if (failed) {
+                return cb(new Error("Test failures reported: " + failed));
+            }
+            else {
+                return cb();
+            }
+        }
+    }
+
+    function makeMochaTest(test) {
+        return {
+            fullTitle: function() {
+                return test.name;
+            },
+            err: {
+                message: test.output[0],
+                stack: test.output.join(os.EOL)
+            }
+        };
+    }
+}
+
+function ProgressBars(options) {
+    if (!options) options = {};
+    var open = options.open || '[';
+    var close = options.close || ']';
+    var complete = options.complete || '▬';
+    var incomplete = options.incomplete || Base.symbols.dot;
+    var maxWidth = Math.floor(Base.window.width * .30) - open.length - close.length - 2;
+    var width = minMax(options.width || maxWidth, 10, maxWidth);
+    this._options = {
+        open: open,
+        complete: complete,
+        incomplete: incomplete,
+        close: close,
+        width: width
+    };
+
+    this._progressBars = [];
+    this._lineCount = 0;
+    this._enabled = false;
+}
+ProgressBars.prototype = {
+    enable: function () {
+        if (!this._enabled) {
+            process.stdout.write(os.EOL);
+            this._enabled = true;
+        }
+    },
+    disable: function () {
+        if (this._enabled) {
+            process.stdout.write(os.EOL);
+            this._enabled = false;
+        }
+    },
+    update: function (index, percentComplete, color, title) {
+        percentComplete = minMax(percentComplete, 0, 1);
+
+        var progressBar = this._progressBars[index] || (this._progressBars[index] = { });
+        var width = this._options.width;
+        var n = Math.floor(width * percentComplete);
+        var i = width - n;
+        if (n === progressBar.lastN && title === progressBar.title && color === progressBar.progressColor) {
+            return;
+        }
+
+        progressBar.lastN = n;
+        progressBar.title = title;
+        progressBar.progressColor = color;
+
+        var progress = "  ";
+        progress += this._color('progress', this._options.open);
+        progress += this._color(color, fill(this._options.complete, n));
+        progress += this._color('progress', fill(this._options.incomplete, i));
+        progress += this._color('progress', this._options.close);
+
+        if (title) {
+            progress += this._color('progress', ' ' + title);
+        }
+
+        if (progressBar.text !== progress) {
+            progressBar.text = progress;
+            this._render(index);
+        }
+    },
+    _render: function (index) {
+        if (!this._enabled || !isatty) {
+            return;
+        }
+
+        cursor.hide();
+        readline.moveCursor(process.stdout, -process.stdout.columns, -this._lineCount);
+        var lineCount = 0;
+        var numProgressBars = this._progressBars.length;
+        for (var i = 0; i < numProgressBars; i++) {
+            if (i === index) {
+                readline.clearLine(process.stdout, 1);
+                process.stdout.write(this._progressBars[i].text + os.EOL);
+            }
+            else {
+                readline.moveCursor(process.stdout, -process.stdout.columns, +1);
+            }
+
+            lineCount++;
+        }
+
+        this._lineCount = lineCount;
+        cursor.show();
+    },
+    _color: function (type, text) {
+        return type && !this._options.noColors ? color(type, text) : text;
+    }
+};
+
+function fill(ch, size) {
+    var s = "";
+    while (s.length < size) {
+        s += ch;
+    }
+
+    return s.length > size ? s.substr(0, size) : s;
+}
+
+function minMax(value, min, max) {
+    if (value < min) return min;
+    if (value > max) return max;
+    return value;
+}
\ No newline at end of file

From 8fc3422e7c67b28b2d46246a8a3008d899b79553 Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Wed, 8 Jun 2016 18:18:26 -0700
Subject: [PATCH 223/332] Fixed typo

---
 scripts/mocha-parallel.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/mocha-parallel.js b/scripts/mocha-parallel.js
index adba8ebf57c..159dd630cc2 100644
--- a/scripts/mocha-parallel.js
+++ b/scripts/mocha-parallel.js
@@ -43,7 +43,7 @@ function discoverTests(run, options, cb) {
 
     p.on("exit", function (status) {
         if (status) {
-            cb(new Error("Process exited width code " + status));
+            cb(new Error("Process exited with code " + status));
         }
         else {
             cb();

From b1a749895a26bcb1115eb93e953f27100c33bdb5 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Wed, 8 Jun 2016 18:39:07 -0700
Subject: [PATCH 224/332] Fix comment

---
 tests/baselines/reference/typeGuardIntersectionTypes.js         | 2 +-
 tests/baselines/reference/typeGuardIntersectionTypes.symbols    | 2 +-
 tests/baselines/reference/typeGuardIntersectionTypes.types      | 2 +-
 .../expressions/typeGuards/typeGuardIntersectionTypes.ts        | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/tests/baselines/reference/typeGuardIntersectionTypes.js b/tests/baselines/reference/typeGuardIntersectionTypes.js
index 6c46b982024..6de7d06e323 100644
--- a/tests/baselines/reference/typeGuardIntersectionTypes.js
+++ b/tests/baselines/reference/typeGuardIntersectionTypes.js
@@ -50,7 +50,7 @@ function union(a: A): A & B | null {
   }
 }
 
-// Repro from #9011
+// Repro from #9016
 
 declare function log(s: string): void;
 
diff --git a/tests/baselines/reference/typeGuardIntersectionTypes.symbols b/tests/baselines/reference/typeGuardIntersectionTypes.symbols
index 707fb95b339..ea8e903c765 100644
--- a/tests/baselines/reference/typeGuardIntersectionTypes.symbols
+++ b/tests/baselines/reference/typeGuardIntersectionTypes.symbols
@@ -117,7 +117,7 @@ function union(a: A): A & B | null {
   }
 }
 
-// Repro from #9011
+// Repro from #9016
 
 declare function log(s: string): void;
 >log : Symbol(log, Decl(typeGuardIntersectionTypes.ts, 49, 1))
diff --git a/tests/baselines/reference/typeGuardIntersectionTypes.types b/tests/baselines/reference/typeGuardIntersectionTypes.types
index 5ce768d4a5e..8be50453572 100644
--- a/tests/baselines/reference/typeGuardIntersectionTypes.types
+++ b/tests/baselines/reference/typeGuardIntersectionTypes.types
@@ -133,7 +133,7 @@ function union(a: A): A & B | null {
   }
 }
 
-// Repro from #9011
+// Repro from #9016
 
 declare function log(s: string): void;
 >log : (s: string) => void
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts
index d0a999acd1c..85c003787fd 100644
--- a/tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts
+++ b/tests/cases/conformance/expressions/typeGuards/typeGuardIntersectionTypes.ts
@@ -50,7 +50,7 @@ function union(a: A): A & B | null {
   }
 }
 
-// Repro from #9011
+// Repro from #9016
 
 declare function log(s: string): void;
 

From 0aa2fe328f938e0f23dd45e3d596754de942cb92 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 9 Jun 2016 05:59:26 -0700
Subject: [PATCH 225/332] Add test for out-of-range error

---
 tests/cases/unittests/transpile.ts | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/tests/cases/unittests/transpile.ts b/tests/cases/unittests/transpile.ts
index 8231f3c9745..a4b1416ed29 100644
--- a/tests/cases/unittests/transpile.ts
+++ b/tests/cases/unittests/transpile.ts
@@ -20,7 +20,7 @@ namespace ts {
                 if (expectedDiagnosticTexts) {
                     assert.equal(expectedDiagnosticTexts[i], diagnostics[i] && diagnostics[i].messageText);
                 }
-            }
+            };
             assert.equal(diagnostics.length, n, "Resuting diagnostics count does not match expected");
         }
 
@@ -319,11 +319,13 @@ var x = 0;`,
             });
 
             it("Fails on bad value", () => {
-                test(``, {
-                    options: { compilerOptions: { module: <ModuleKind><any>{} } },
-                    expectedDiagnosticCodes: [6046],
-                    expectedDiagnosticTexts: ["Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'"]
-                });
+                for (const value in [123, {}, ""]) {
+                    test(``, {
+                        options: { compilerOptions: { module: <ModuleKind><any>value } },
+                        expectedDiagnosticCodes: [6046],
+                        expectedDiagnosticTexts: ["Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'"]
+                    });
+                }
             });
         });
     });

From b08fe6f4f6eb67936d7ea917d5cef974ff897ee3 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 9 Jun 2016 06:39:59 -0700
Subject: [PATCH 226/332] Use proper method of not resolving alias

---
 src/compiler/checker.ts                   | 14 ++---
 tests/cases/fourslash/quickInfoMeaning.ts | 67 +++++++++++++++++++++++
 2 files changed, 71 insertions(+), 10 deletions(-)
 create mode 100644 tests/cases/fourslash/quickInfoMeaning.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 65335117cf2..e2f832c9580 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -1207,7 +1207,7 @@ namespace ts {
         }
 
         // Resolves a qualified name and any involved aliases
-        function resolveEntityName(name: EntityName | Expression, meaning: SymbolFlags, ignoreErrors?: boolean, dontResolveAlias?: boolean): Symbol {
+        function resolveEntityName(name: EntityName | Expression, meaning: SymbolFlags, ignoreErrors = false, dontResolveAlias = false): Symbol {
             if (nodeIsMissing(name)) {
                 return undefined;
             }
@@ -16873,10 +16873,7 @@ namespace ts {
                         return getIntrinsicTagSymbol(<JsxOpeningLikeElement>entityName.parent);
                     }
 
-                    // Include aliases in the meaning, this ensures that we do not follow aliases to where they point and instead
-                    // return the alias symbol.
-                    const meaning: SymbolFlags = SymbolFlags.Value | SymbolFlags.Alias;
-                    return resolveEntityName(<Identifier>entityName, meaning);
+                    return resolveEntityName(<Identifier>entityName, SymbolFlags.Value, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
                 }
                 else if (entityName.kind === SyntaxKind.PropertyAccessExpression) {
                     const symbol = getNodeLinks(entityName).resolvedSymbol;
@@ -16894,11 +16891,8 @@ namespace ts {
                 }
             }
             else if (isTypeReferenceIdentifier(<EntityName>entityName)) {
-                let meaning = (entityName.parent.kind === SyntaxKind.TypeReference || entityName.parent.kind === SyntaxKind.JSDocTypeReference) ? SymbolFlags.Type : SymbolFlags.Namespace;
-                // Include aliases in the meaning, this ensures that we do not follow aliases to where they point and instead
-                // return the alias symbol.
-                meaning |= SymbolFlags.Alias;
-                return resolveEntityName(<EntityName>entityName, meaning);
+                const meaning = (entityName.parent.kind === SyntaxKind.TypeReference || entityName.parent.kind === SyntaxKind.JSDocTypeReference) ? SymbolFlags.Type : SymbolFlags.Namespace;
+                return resolveEntityName(<EntityName>entityName, meaning, /*ignoreErrors*/ false, /*dontResolveAlias*/true);
             }
             else if (entityName.parent.kind === SyntaxKind.JsxAttribute) {
                 return getJsxAttributePropertySymbol(<JsxAttribute>entityName.parent);
diff --git a/tests/cases/fourslash/quickInfoMeaning.ts b/tests/cases/fourslash/quickInfoMeaning.ts
new file mode 100644
index 00000000000..51b17337486
--- /dev/null
+++ b/tests/cases/fourslash/quickInfoMeaning.ts
@@ -0,0 +1,67 @@
+///<reference path="fourslash.ts" />
+
+// Testing that quickInfo gets information with a corresponding meaning: values to values, types to types.
+// For quick info purposes, we don't resolve past aliases.
+// However, when we have an alias for a type, the quickInfo for a value with the same should skip the alias, and vice versa.
+// goToDefinition should work the same way.
+
+// @Filename: foo.d.ts
+////declare const /*foo_value_declaration*/foo: number;
+////declare module "foo_module" {
+////    interface I { x: number; y: number }
+////    export = I;
+////}
+
+// @Filename: foo_user.ts
+///////<reference path="foo.d.ts" />
+/////*foo_type_declaration*/import foo = require("foo_module");
+////const x = foo/*foo_value*/;
+////const i: foo/*foo_type*/ = { x: 1, y: 2 };
+
+verify.numberOfErrorsInCurrentFile(0);
+
+verify.navigationItemsListCount(2, "foo", "exact");
+verify.navigationItemsListContains("foo", "alias", "foo", "exact");
+verify.navigationItemsListContains("foo", "const", "foo", "exact");
+
+goTo.marker("foo_value");
+verify.quickInfoIs("const foo: number");
+goTo.definition();
+verify.caretAtMarker("foo_value_declaration");
+
+goTo.marker("foo_type");
+verify.quickInfoIs("import foo = require(\"foo_module\")");
+goTo.definition();
+verify.caretAtMarker("foo_type_declaration");
+
+
+// Above tested for global const and imported interface. Now test with global interface and imported const.
+
+
+// @Filename: bar.d.ts
+/////*bar_type_declaration*/declare interface bar { x: number; y: number }
+////declare module "bar_module" {
+////    const x: number;
+////    export = x;
+////}
+
+// @Filename: bar_user.ts
+///////<reference path="bar.d.ts" />
+/////*bar_value_declaration*/import bar = require("bar_module");
+////const x = bar/*bar_value*/;
+////const i: bar/*bar_type*/ = { x: 1, y: 2 };
+
+verify.numberOfErrorsInCurrentFile(0);
+verify.navigationItemsListCount(2, "bar", "exact");
+verify.navigationItemsListContains("bar", "alias", "bar", "exact");
+verify.navigationItemsListContains("bar", "interface", "bar", "exact");
+
+goTo.marker("bar_value");
+verify.quickInfoIs("import bar = require(\"bar_module\")");
+goTo.definition();
+verify.caretAtMarker("bar_value_declaration");
+
+goTo.marker("bar_type");
+verify.quickInfoIs("interface bar");
+goTo.definition();
+verify.caretAtMarker("bar_type_declaration");

From 9ef9b743d10e26d0eda593a086b7516c82774e3c Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 9 Jun 2016 08:22:58 -0700
Subject: [PATCH 227/332] Fix module loading error

(commandLineOptions_stringToEnum would be undefined if optionDeclarations wasn't loaded yet)
---
 src/services/services.ts | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/services/services.ts b/src/services/services.ts
index c64610c7509..0002bb1bacb 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1920,12 +1920,16 @@ namespace ts {
         sourceMapText?: string;
     }
 
-    const commandLineOptions_stringToEnum = <CommandLineOptionOfCustomType[]>filter(optionDeclarations, o => {
-        return typeof o.type === "object" && !forEachValue(<Map<any>> o.type, v => typeof v !== "number");
-    });
+
+
+    let commandLineOptions_stringToEnum: CommandLineOptionOfCustomType[];
 
     /** JS users may pass in string values for enum compiler options (such as ModuleKind), so convert. */
-    function fixupCompilerOptions(options: CompilerOptions, diagnostics: Diagnostic[]) {
+    function fixupCompilerOptions(options: CompilerOptions, diagnostics: Diagnostic[]): CompilerOptions {
+        // Lazily create this value to fix module loading errors.
+        commandLineOptions_stringToEnum = commandLineOptions_stringToEnum || <CommandLineOptionOfCustomType[]>filter(optionDeclarations, o =>
+            typeof o.type === "object" && !forEachValue(<Map<any>> o.type, v => typeof v !== "number"));
+
         options = clone(options);
 
         for (const opt of commandLineOptions_stringToEnum) {

From 3ab1e273178f6387cd757d040b783f2244701801 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 9 Jun 2016 09:20:15 -0700
Subject: [PATCH 228/332] Update tests

---
 tests/baselines/reference/typeReferenceDirectives13.symbols | 2 +-
 tests/baselines/reference/typeReferenceDirectives5.symbols  | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/tests/baselines/reference/typeReferenceDirectives13.symbols b/tests/baselines/reference/typeReferenceDirectives13.symbols
index 90a32b16341..396cde9c3b4 100644
--- a/tests/baselines/reference/typeReferenceDirectives13.symbols
+++ b/tests/baselines/reference/typeReferenceDirectives13.symbols
@@ -8,7 +8,7 @@ export interface A {
 
     x: () => typeof $
 >x : Symbol(A.x, Decl(app.ts, 2, 20))
->$ : Symbol($, Decl(app.ts, 1, 8))
+>$ : Symbol($, Decl(index.d.ts, 0, 11))
 }
 
 === /ref.d.ts ===
diff --git a/tests/baselines/reference/typeReferenceDirectives5.symbols b/tests/baselines/reference/typeReferenceDirectives5.symbols
index fbbb06d6834..16f7b4ce808 100644
--- a/tests/baselines/reference/typeReferenceDirectives5.symbols
+++ b/tests/baselines/reference/typeReferenceDirectives5.symbols
@@ -8,7 +8,7 @@ export interface A {
 
     x: typeof $;
 >x : Symbol(A.x, Decl(app.ts, 2, 20))
->$ : Symbol($, Decl(app.ts, 1, 8))
+>$ : Symbol($, Decl(index.d.ts, 0, 11))
 }
 === /ref.d.ts ===
 

From 7a2ef428cdfdf476975518df40102d8bc16aabf5 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 9 Jun 2016 10:55:45 -0700
Subject: [PATCH 229/332] Contextually type return statement in async function

---
 src/compiler/checker.ts                       | 10 ++++++
 .../reference/asyncFunctionReturnType.js      | 33 +++++++++++++++++++
 .../reference/asyncFunctionReturnType.symbols | 16 +++++++++
 .../reference/asyncFunctionReturnType.types   | 22 +++++++++++++
 .../cases/compiler/asyncFunctionReturnType.ts | 10 ++++++
 5 files changed, 91 insertions(+)
 create mode 100644 tests/baselines/reference/asyncFunctionReturnType.js
 create mode 100644 tests/baselines/reference/asyncFunctionReturnType.symbols
 create mode 100644 tests/baselines/reference/asyncFunctionReturnType.types
 create mode 100644 tests/cases/compiler/asyncFunctionReturnType.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 65335117cf2..ac378ef5fd8 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -8756,6 +8756,16 @@ namespace ts {
 
         function getContextualTypeForReturnExpression(node: Expression): Type {
             const func = getContainingFunction(node);
+
+            if (isAsyncFunctionLike(func)) {
+                const contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return getPromisedType(contextualReturnType);
+                }
+
+                return undefined;
+            }
+
             if (func && !func.asteriskToken) {
                 return getContextualReturnType(func);
             }
diff --git a/tests/baselines/reference/asyncFunctionReturnType.js b/tests/baselines/reference/asyncFunctionReturnType.js
new file mode 100644
index 00000000000..12cb44fbcf0
--- /dev/null
+++ b/tests/baselines/reference/asyncFunctionReturnType.js
@@ -0,0 +1,33 @@
+//// [asyncFunctionReturnType.ts]
+async function fAsync() {
+    // Without explicit type annotation, this is just an array.
+    return [1, true];
+}
+
+async function fAsyncExplicit(): Promise<[number, boolean]> {
+    // This is contextually typed as a tuple.
+    return [1, true];
+}
+
+
+//// [asyncFunctionReturnType.js]
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments)).next());
+    });
+};
+function fAsync() {
+    return __awaiter(this, void 0, void 0, function* () {
+        // Without explicit type annotation, this is just an array.
+        return [1, true];
+    });
+}
+function fAsyncExplicit() {
+    return __awaiter(this, void 0, void 0, function* () {
+        // This is contextually typed as a tuple.
+        return [1, true];
+    });
+}
diff --git a/tests/baselines/reference/asyncFunctionReturnType.symbols b/tests/baselines/reference/asyncFunctionReturnType.symbols
new file mode 100644
index 00000000000..75e456b6a8b
--- /dev/null
+++ b/tests/baselines/reference/asyncFunctionReturnType.symbols
@@ -0,0 +1,16 @@
+=== tests/cases/compiler/asyncFunctionReturnType.ts ===
+async function fAsync() {
+>fAsync : Symbol(fAsync, Decl(asyncFunctionReturnType.ts, 0, 0))
+
+    // Without explicit type annotation, this is just an array.
+    return [1, true];
+}
+
+async function fAsyncExplicit(): Promise<[number, boolean]> {
+>fAsyncExplicit : Symbol(fAsyncExplicit, Decl(asyncFunctionReturnType.ts, 3, 1))
+>Promise : Symbol(Promise, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
+
+    // This is contextually typed as a tuple.
+    return [1, true];
+}
+
diff --git a/tests/baselines/reference/asyncFunctionReturnType.types b/tests/baselines/reference/asyncFunctionReturnType.types
new file mode 100644
index 00000000000..c6289ab012d
--- /dev/null
+++ b/tests/baselines/reference/asyncFunctionReturnType.types
@@ -0,0 +1,22 @@
+=== tests/cases/compiler/asyncFunctionReturnType.ts ===
+async function fAsync() {
+>fAsync : () => Promise<(number | boolean)[]>
+
+    // Without explicit type annotation, this is just an array.
+    return [1, true];
+>[1, true] : (number | boolean)[]
+>1 : number
+>true : boolean
+}
+
+async function fAsyncExplicit(): Promise<[number, boolean]> {
+>fAsyncExplicit : () => Promise<[number, boolean]>
+>Promise : Promise<T>
+
+    // This is contextually typed as a tuple.
+    return [1, true];
+>[1, true] : [number, boolean]
+>1 : number
+>true : boolean
+}
+
diff --git a/tests/cases/compiler/asyncFunctionReturnType.ts b/tests/cases/compiler/asyncFunctionReturnType.ts
new file mode 100644
index 00000000000..a1bcde38079
--- /dev/null
+++ b/tests/cases/compiler/asyncFunctionReturnType.ts
@@ -0,0 +1,10 @@
+// @target: ES6
+async function fAsync() {
+    // Without explicit type annotation, this is just an array.
+    return [1, true];
+}
+
+async function fAsyncExplicit(): Promise<[number, boolean]> {
+    // This is contextually typed as a tuple.
+    return [1, true];
+}

From 3492542ebbfdf345690b9145bc8c56922f1a3ec0 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Thu, 9 Jun 2016 10:58:03 -0700
Subject: [PATCH 230/332] Remove stale files

---
 .../es6modulekindWithES5Target9.symbols        | 12 ------------
 .../es6modulekindWithES5Target9.types          | 18 ------------------
 2 files changed, 30 deletions(-)
 delete mode 100644 tests/baselines/reference/es6modulekindWithES5Target9.symbols
 delete mode 100644 tests/baselines/reference/es6modulekindWithES5Target9.types

diff --git a/tests/baselines/reference/es6modulekindWithES5Target9.symbols b/tests/baselines/reference/es6modulekindWithES5Target9.symbols
deleted file mode 100644
index c973b542d45..00000000000
--- a/tests/baselines/reference/es6modulekindWithES5Target9.symbols
+++ /dev/null
@@ -1,12 +0,0 @@
-=== tests/cases/compiler/es6modulekindWithES5Target9.ts ===
-
-export var {a, b } = { a: 0, b: 1 };
->a : Symbol(a, Decl(es6modulekindWithES5Target9.ts, 1, 12))
->b : Symbol(b, Decl(es6modulekindWithES5Target9.ts, 1, 14))
->a : Symbol(a, Decl(es6modulekindWithES5Target9.ts, 1, 22))
->b : Symbol(b, Decl(es6modulekindWithES5Target9.ts, 1, 28))
-
-export var [d, e] = [1, 2];
->d : Symbol(d, Decl(es6modulekindWithES5Target9.ts, 2, 12))
->e : Symbol(e, Decl(es6modulekindWithES5Target9.ts, 2, 14))
-
diff --git a/tests/baselines/reference/es6modulekindWithES5Target9.types b/tests/baselines/reference/es6modulekindWithES5Target9.types
deleted file mode 100644
index bd4eb2ea102..00000000000
--- a/tests/baselines/reference/es6modulekindWithES5Target9.types
+++ /dev/null
@@ -1,18 +0,0 @@
-=== tests/cases/compiler/es6modulekindWithES5Target9.ts ===
-
-export var {a, b } = { a: 0, b: 1 };
->a : number
->b : number
->{ a: 0, b: 1 } : { a: number; b: number; }
->a : number
->0 : number
->b : number
->1 : number
-
-export var [d, e] = [1, 2];
->d : number
->e : number
->[1, 2] : [number, number]
->1 : number
->2 : number
-

From 5e72b8a098d97f6d18444ce787c72077faa4dddd Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 9 Jun 2016 10:58:38 -0700
Subject: [PATCH 231/332] Undo change

---
 src/compiler/checker.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index e2f832c9580..2cfd0ca94c0 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -1207,7 +1207,7 @@ namespace ts {
         }
 
         // Resolves a qualified name and any involved aliases
-        function resolveEntityName(name: EntityName | Expression, meaning: SymbolFlags, ignoreErrors = false, dontResolveAlias = false): Symbol {
+        function resolveEntityName(name: EntityName | Expression, meaning: SymbolFlags, ignoreErrors?: boolean, dontResolveAlias?: boolean): Symbol {
             if (nodeIsMissing(name)) {
                 return undefined;
             }

From 03371c0e6f20d49fda583ff96a52e9d0c4967460 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 9 Jun 2016 11:12:12 -0700
Subject: [PATCH 232/332] Improve perf

---
 src/compiler/checker.ts | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 149f21734a4..8e5d5e61b75 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -11291,7 +11291,7 @@ namespace ts {
             const declaringClassDeclaration = <ClassLikeDeclaration>getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
             const declaringClass = <InterfaceType>getDeclaredTypeOfSymbol(declaration.parent.symbol);
 
-            // A private or protected constructor can only be instantiated within it's own class 
+            // A private or protected constructor can only be instantiated within it's own class
             if (!isNodeWithinClass(node, declaringClassDeclaration)) {
                 if (flags & NodeFlags.Private) {
                     error(node, Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
@@ -16154,12 +16154,12 @@ namespace ts {
             const symbol = getSymbolOfNode(node);
             const target = resolveAlias(symbol);
             if (target !== unknownSymbol) {
-                // For external modules symbol represent local symbol for an alias. 
+                // For external modules symbol represent local symbol for an alias.
                 // This local symbol will merge any other local declarations (excluding other aliases)
                 // and symbol.flags will contains combined representation for all merged declaration.
                 // Based on symbol.flags we can compute a set of excluded meanings (meaning that resolved alias should not have,
-                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export* 
-                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names). 
+                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export*
+                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names).
                 const excludedMeanings =
                     (symbol.flags & (SymbolFlags.Value | SymbolFlags.ExportValue) ? SymbolFlags.Value : 0) |
                     (symbol.flags & SymbolFlags.Type ? SymbolFlags.Type : 0) |
@@ -16358,7 +16358,7 @@ namespace ts {
                         continue;
                     }
                     const { declarations, flags } = exports[id];
-                    // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries. 
+                    // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries.
                     // (TS Exceptions: namespaces, function overloads, enums, and interfaces)
                     if (flags & (SymbolFlags.Namespace | SymbolFlags.Interface | SymbolFlags.Enum)) {
                         continue;
@@ -17063,10 +17063,10 @@ namespace ts {
         }
 
         // Gets the type of object literal or array literal of destructuring assignment.
-        // { a } from 
+        // { a } from
         //     for ( { a } of elems) {
         //     }
-        // [ a ] from 
+        // [ a ] from
         //     [a] = [ some array ...]
         function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr: Expression): Type {
             Debug.assert(expr.kind === SyntaxKind.ObjectLiteralExpression || expr.kind === SyntaxKind.ArrayLiteralExpression);
@@ -17099,10 +17099,10 @@ namespace ts {
         }
 
         // Gets the property symbol corresponding to the property in destructuring assignment
-        // 'property1' from 
+        // 'property1' from
         //     for ( { property1: a } of elems) {
         //     }
-        // 'property1' at location 'a' from: 
+        // 'property1' at location 'a' from:
         //     [a] = [ property1, property2 ]
         function getPropertySymbolOfDestructuringAssignment(location: Identifier) {
             // Get the type of the object or array literal and then look for property of given name in the type
@@ -17642,7 +17642,7 @@ namespace ts {
                     mergeSymbolTable(globals, file.locals);
                 }
                 if (file.patternAmbientModules && file.patternAmbientModules.length) {
-                    (patternAmbientModules || (patternAmbientModules = [])).push(...file.patternAmbientModules);
+                    patternAmbientModules = concatenate(patternAmbientModules, file.patternAmbientModules);
                 }
 
                 if (file.moduleAugmentations.length) {

From 559b49baa9380bfd77681aa466444e1d9c37d5cf Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 9 Jun 2016 11:33:53 -0700
Subject: [PATCH 233/332] Improve tests

---
 .../ambientDeclarationsPatterns.errors.txt    | 29 ----------
 .../reference/ambientDeclarationsPatterns.js  | 24 ++++++---
 .../ambientDeclarationsPatterns.symbols       | 51 ++++++++++++++++++
 .../ambientDeclarationsPatterns.types         | 54 +++++++++++++++++++
 ...ationsPatterns_tooManyAsterisks.errors.txt |  8 +++
 ...ntDeclarationsPatterns_tooManyAsterisks.js |  5 ++
 .../ambient/ambientDeclarationsPatterns.ts    | 19 ++++---
 ...ntDeclarationsPatterns_tooManyAsterisks.ts |  1 +
 8 files changed, 150 insertions(+), 41 deletions(-)
 delete mode 100644 tests/baselines/reference/ambientDeclarationsPatterns.errors.txt
 create mode 100644 tests/baselines/reference/ambientDeclarationsPatterns.symbols
 create mode 100644 tests/baselines/reference/ambientDeclarationsPatterns.types
 create mode 100644 tests/baselines/reference/ambientDeclarationsPatterns_tooManyAsterisks.errors.txt
 create mode 100644 tests/baselines/reference/ambientDeclarationsPatterns_tooManyAsterisks.js
 create mode 100644 tests/cases/conformance/ambient/ambientDeclarationsPatterns_tooManyAsterisks.ts

diff --git a/tests/baselines/reference/ambientDeclarationsPatterns.errors.txt b/tests/baselines/reference/ambientDeclarationsPatterns.errors.txt
deleted file mode 100644
index 8fc7e4a3d18..00000000000
--- a/tests/baselines/reference/ambientDeclarationsPatterns.errors.txt
+++ /dev/null
@@ -1,29 +0,0 @@
-tests/cases/conformance/ambient/declarations.d.ts(10,16): error TS5061: Pattern 'too*many*asterisks' can have at most one '*' character
-
-
-==== tests/cases/conformance/ambient/user.ts (0 errors) ====
-    ///<reference path="declarations.d.ts" />
-    import {foo, baz} from "foobarbaz";
-    foo(baz);
-    
-    import {foos} from "foosball";
-    
-==== tests/cases/conformance/ambient/declarations.d.ts (1 errors) ====
-    declare module "foo*baz" {
-        export function foo(n: number): void;
-    }
-    // Augmentations still work
-    declare module "foo*baz" {
-        export const baz: number;
-    }
-    
-    // Should be an error
-    declare module "too*many*asterisks" { }
-                   ~~~~~~~~~~~~~~~~~~~~
-!!! error TS5061: Pattern 'too*many*asterisks' can have at most one '*' character
-    
-    // Longest prefix wins
-    declare module "foos*" {
-        export const foos: number;
-    }
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/ambientDeclarationsPatterns.js b/tests/baselines/reference/ambientDeclarationsPatterns.js
index ee9833a3a37..143f26550e9 100644
--- a/tests/baselines/reference/ambientDeclarationsPatterns.js
+++ b/tests/baselines/reference/ambientDeclarationsPatterns.js
@@ -2,19 +2,21 @@
 
 //// [declarations.d.ts]
 declare module "foo*baz" {
-    export function foo(n: number): void;
+    export function foo(s: string): void;
 }
 // Augmentations still work
 declare module "foo*baz" {
-    export const baz: number;
+    export const baz: string;
 }
 
-// Should be an error
-declare module "too*many*asterisks" { }
-
 // Longest prefix wins
 declare module "foos*" {
-    export const foos: number;
+    export const foos: string;
+}
+
+declare module "*!text" {
+    const x: string;
+    export default x;
 }
 
 //// [user.ts]
@@ -23,6 +25,11 @@ import {foo, baz} from "foobarbaz";
 foo(baz);
 
 import {foos} from "foosball";
+foo(foos);
+
+// Works with relative file name
+import fileText from "./file!text";
+foo(fileText);
 
 
 //// [user.js]
@@ -30,3 +37,8 @@ import {foos} from "foosball";
 ///<reference path="declarations.d.ts" />
 var foobarbaz_1 = require("foobarbaz");
 foobarbaz_1.foo(foobarbaz_1.baz);
+var foosball_1 = require("foosball");
+foobarbaz_1.foo(foosball_1.foos);
+// Works with relative file name
+var file_text_1 = require("./file!text");
+foobarbaz_1.foo(file_text_1["default"]);
diff --git a/tests/baselines/reference/ambientDeclarationsPatterns.symbols b/tests/baselines/reference/ambientDeclarationsPatterns.symbols
new file mode 100644
index 00000000000..4c0acc93f8f
--- /dev/null
+++ b/tests/baselines/reference/ambientDeclarationsPatterns.symbols
@@ -0,0 +1,51 @@
+=== tests/cases/conformance/ambient/user.ts ===
+///<reference path="declarations.d.ts" />
+import {foo, baz} from "foobarbaz";
+>foo : Symbol(foo, Decl(user.ts, 1, 8))
+>baz : Symbol(baz, Decl(user.ts, 1, 12))
+
+foo(baz);
+>foo : Symbol(foo, Decl(user.ts, 1, 8))
+>baz : Symbol(baz, Decl(user.ts, 1, 12))
+
+import {foos} from "foosball";
+>foos : Symbol(foos, Decl(user.ts, 4, 8))
+
+foo(foos);
+>foo : Symbol(foo, Decl(user.ts, 1, 8))
+>foos : Symbol(foos, Decl(user.ts, 4, 8))
+
+// Works with relative file name
+import fileText from "./file!text";
+>fileText : Symbol(fileText, Decl(user.ts, 8, 6))
+
+foo(fileText);
+>foo : Symbol(foo, Decl(user.ts, 1, 8))
+>fileText : Symbol(fileText, Decl(user.ts, 8, 6))
+
+=== tests/cases/conformance/ambient/declarations.d.ts ===
+declare module "foo*baz" {
+    export function foo(s: string): void;
+>foo : Symbol(foo, Decl(declarations.d.ts, 0, 26))
+>s : Symbol(s, Decl(declarations.d.ts, 1, 24))
+}
+// Augmentations still work
+declare module "foo*baz" {
+    export const baz: string;
+>baz : Symbol(baz, Decl(declarations.d.ts, 5, 16))
+}
+
+// Longest prefix wins
+declare module "foos*" {
+    export const foos: string;
+>foos : Symbol(foos, Decl(declarations.d.ts, 10, 16))
+}
+
+declare module "*!text" {
+    const x: string;
+>x : Symbol(x, Decl(declarations.d.ts, 14, 9))
+
+    export default x;
+>x : Symbol(x, Decl(declarations.d.ts, 14, 9))
+}
+
diff --git a/tests/baselines/reference/ambientDeclarationsPatterns.types b/tests/baselines/reference/ambientDeclarationsPatterns.types
new file mode 100644
index 00000000000..adf8ae1ab3b
--- /dev/null
+++ b/tests/baselines/reference/ambientDeclarationsPatterns.types
@@ -0,0 +1,54 @@
+=== tests/cases/conformance/ambient/user.ts ===
+///<reference path="declarations.d.ts" />
+import {foo, baz} from "foobarbaz";
+>foo : (s: string) => void
+>baz : string
+
+foo(baz);
+>foo(baz) : void
+>foo : (s: string) => void
+>baz : string
+
+import {foos} from "foosball";
+>foos : string
+
+foo(foos);
+>foo(foos) : void
+>foo : (s: string) => void
+>foos : string
+
+// Works with relative file name
+import fileText from "./file!text";
+>fileText : string
+
+foo(fileText);
+>foo(fileText) : void
+>foo : (s: string) => void
+>fileText : string
+
+=== tests/cases/conformance/ambient/declarations.d.ts ===
+declare module "foo*baz" {
+    export function foo(s: string): void;
+>foo : (s: string) => void
+>s : string
+}
+// Augmentations still work
+declare module "foo*baz" {
+    export const baz: string;
+>baz : string
+}
+
+// Longest prefix wins
+declare module "foos*" {
+    export const foos: string;
+>foos : string
+}
+
+declare module "*!text" {
+    const x: string;
+>x : string
+
+    export default x;
+>x : string
+}
+
diff --git a/tests/baselines/reference/ambientDeclarationsPatterns_tooManyAsterisks.errors.txt b/tests/baselines/reference/ambientDeclarationsPatterns_tooManyAsterisks.errors.txt
new file mode 100644
index 00000000000..7a3ff02aa5e
--- /dev/null
+++ b/tests/baselines/reference/ambientDeclarationsPatterns_tooManyAsterisks.errors.txt
@@ -0,0 +1,8 @@
+tests/cases/conformance/ambient/ambientDeclarationsPatterns_tooManyAsterisks.ts(1,16): error TS5061: Pattern 'too*many*asterisks' can have at most one '*' character
+
+
+==== tests/cases/conformance/ambient/ambientDeclarationsPatterns_tooManyAsterisks.ts (1 errors) ====
+    declare module "too*many*asterisks" { }
+                   ~~~~~~~~~~~~~~~~~~~~
+!!! error TS5061: Pattern 'too*many*asterisks' can have at most one '*' character
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/ambientDeclarationsPatterns_tooManyAsterisks.js b/tests/baselines/reference/ambientDeclarationsPatterns_tooManyAsterisks.js
new file mode 100644
index 00000000000..a664eb84dc5
--- /dev/null
+++ b/tests/baselines/reference/ambientDeclarationsPatterns_tooManyAsterisks.js
@@ -0,0 +1,5 @@
+//// [ambientDeclarationsPatterns_tooManyAsterisks.ts]
+declare module "too*many*asterisks" { }
+
+
+//// [ambientDeclarationsPatterns_tooManyAsterisks.js]
diff --git a/tests/cases/conformance/ambient/ambientDeclarationsPatterns.ts b/tests/cases/conformance/ambient/ambientDeclarationsPatterns.ts
index 43e373ba9de..d48f50bfa50 100644
--- a/tests/cases/conformance/ambient/ambientDeclarationsPatterns.ts
+++ b/tests/cases/conformance/ambient/ambientDeclarationsPatterns.ts
@@ -1,18 +1,20 @@
 // @Filename: declarations.d.ts
 declare module "foo*baz" {
-    export function foo(n: number): void;
+    export function foo(s: string): void;
 }
 // Augmentations still work
 declare module "foo*baz" {
-    export const baz: number;
+    export const baz: string;
 }
 
-// Should be an error
-declare module "too*many*asterisks" { }
-
 // Longest prefix wins
 declare module "foos*" {
-    export const foos: number;
+    export const foos: string;
+}
+
+declare module "*!text" {
+    const x: string;
+    export default x;
 }
 
 // @Filename: user.ts
@@ -21,3 +23,8 @@ import {foo, baz} from "foobarbaz";
 foo(baz);
 
 import {foos} from "foosball";
+foo(foos);
+
+// Works with relative file name
+import fileText from "./file!text";
+foo(fileText);
diff --git a/tests/cases/conformance/ambient/ambientDeclarationsPatterns_tooManyAsterisks.ts b/tests/cases/conformance/ambient/ambientDeclarationsPatterns_tooManyAsterisks.ts
new file mode 100644
index 00000000000..76f9081906c
--- /dev/null
+++ b/tests/cases/conformance/ambient/ambientDeclarationsPatterns_tooManyAsterisks.ts
@@ -0,0 +1 @@
+declare module "too*many*asterisks" { }

From 88be1ac1c357559bed8629215d8deba4eb260b8a Mon Sep 17 00:00:00 2001
From: Wesley Wigham <t-weswig@microsoft.com>
Date: Thu, 9 Jun 2016 11:47:41 -0700
Subject: [PATCH 234/332] Fix sourcemaps for debugging tests

---
 Jakefile.js | 20 +++-----------------
 1 file changed, 3 insertions(+), 17 deletions(-)

diff --git a/Jakefile.js b/Jakefile.js
index 3540655af4a..873ab41eb0f 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -312,10 +312,7 @@ function compileFile(outFile, sources, prereqs, prefixes, useBuiltCompiler, opts
         }
 
         if (useDebugMode) {
-            options += " -sourcemap";
-            if (!opts.noMapRoot) {
-                options += " -mapRoot file:///" + path.resolve(path.dirname(outFile));
-            }
+            options += " --inlineSourceMap --inlineSources";
         } else {
             options += " --newLine LF";
         }
@@ -485,7 +482,6 @@ var tscFile = path.join(builtLocalDirectory, compilerFilename);
 compileFile(tscFile, compilerSources, [builtLocalDirectory, copyright].concat(compilerSources), [copyright], /*useBuiltCompiler:*/ false);
 
 var servicesFile = path.join(builtLocalDirectory, "typescriptServices.js");
-var servicesFileInBrowserTest = path.join(builtLocalDirectory, "typescriptServicesInBrowserTest.js");
 var standaloneDefinitionsFile = path.join(builtLocalDirectory, "typescriptServices.d.ts");
 var nodePackageFile = path.join(builtLocalDirectory, "typescript.js");
 var nodeDefinitionsFile = path.join(builtLocalDirectory, "typescript.d.ts");
@@ -517,16 +513,6 @@ compileFile(servicesFile, servicesSources,[builtLocalDirectory, copyright].conca
                 fs.writeFileSync(nodeStandaloneDefinitionsFile, nodeStandaloneDefinitionsFileContents);
             });
 
-compileFile(servicesFileInBrowserTest, servicesSources,[builtLocalDirectory, copyright].concat(servicesSources),
-            /*prefixes*/ [copyright],
-            /*useBuiltCompiler*/ true,
-            { noOutFile: false, generateDeclarations: true, preserveConstEnums: true, keepComments: true, noResolve: false, stripInternal: true, noMapRoot: true },
-            /*callback*/ function () {
-                var content = fs.readFileSync(servicesFileInBrowserTest).toString();
-                var i = content.lastIndexOf("\n");
-                fs.writeFileSync(servicesFileInBrowserTest, content.substring(0, i) + "\r\n//# sourceURL=../built/local/typeScriptServices.js" + content.substring(i));
-            });
-
 
 var serverFile = path.join(builtLocalDirectory, "tsserver.js");
 compileFile(serverFile, serverSources,[builtLocalDirectory, copyright].concat(serverSources), /*prefixes*/ [copyright], /*useBuiltCompiler*/ true);
@@ -839,12 +825,12 @@ compileFile(nodeServerOutFile, [nodeServerInFile], [builtLocalDirectory, tscFile
 
 desc("Runs browserify on run.js to produce a file suitable for running tests in the browser");
 task("browserify", ["tests", builtLocalDirectory, nodeServerOutFile], function() {
-    var cmd = 'browserify built/local/run.js -o built/local/bundle.js';
+    var cmd = 'browserify built/local/run.js -d -o built/local/bundle.js';
     exec(cmd);
 }, {async: true});
 
 desc("Runs the tests using the built run.js file like 'jake runtests'. Syntax is jake runtests-browser. Additional optional parameters tests=[regex], port=, browser=[chrome|IE]");
-task("runtests-browser", ["tests", "browserify", builtLocalDirectory, servicesFileInBrowserTest], function() {
+task("runtests-browser", ["tests", "browserify", builtLocalDirectory, servicesFile], function() {
     cleanTestDirs();
     host = "node";
     port = process.env.port || process.env.p || '8888';

From b521fd55a45f1013aca0ba59b0bf7928b3962b31 Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Thu, 9 Jun 2016 11:51:53 -0700
Subject: [PATCH 235/332] Allow --sourceRoot with --inlineSources option Fixes
 #8445

---
 src/compiler/diagnosticMessages.json          |  2 +-
 src/compiler/program.ts                       | 19 +++++++------------
 ...ourcemapInlineSourcesSourceRoot.errors.txt |  7 -------
 ...nsSourcemapInlineSourcesSourceRoot.symbols |  5 +++++
 ...ionsSourcemapInlineSourcesSourceRoot.types |  6 ++++++
 ...SourceRootWithNoSourceMapOption.errors.txt |  4 ++--
 ...SourceRootWithNoSourceMapOption.errors.txt |  4 ++--
 ...sourceRootWithNoSourceMapOption.errors.txt |  4 ++--
 ...sourceRootWithNoSourceMapOption.errors.txt |  4 ++--
 9 files changed, 27 insertions(+), 28 deletions(-)
 delete mode 100644 tests/baselines/reference/optionsSourcemapInlineSourcesSourceRoot.errors.txt
 create mode 100644 tests/baselines/reference/optionsSourcemapInlineSourcesSourceRoot.symbols
 create mode 100644 tests/baselines/reference/optionsSourcemapInlineSourcesSourceRoot.types

diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 034bd27b147..b6f7191049f 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -2260,7 +2260,7 @@
         "category": "Error",
         "code": 5047
     },
-    "Option 'inlineSources' can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided.": {
+    "Option '{0} can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided.": {
         "category": "Error",
         "code": 5051
     },
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 5b64d066da1..b765f580135 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -2043,12 +2043,12 @@ namespace ts {
                 }
             }
 
-            if (options.inlineSources) {
-                if (!options.sourceMap && !options.inlineSourceMap) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided));
+            if (!options.sourceMap && !options.inlineSourceMap) {
+                if (options.inlineSources) {
+                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "inlineSources"));
                 }
                 if (options.sourceRoot) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceRoot", "inlineSources"));
+                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "sourceRoot"));
                 }
             }
 
@@ -2056,14 +2056,9 @@ namespace ts {
                 programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
             }
 
-            if (!options.sourceMap && (options.mapRoot || options.sourceRoot)) {
-                // Error to specify --mapRoot or --sourceRoot without mapSourceFiles
-                if (options.mapRoot) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
-                }
-                if (options.sourceRoot && !options.inlineSourceMap) {
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "sourceRoot", "sourceMap"));
-                }
+            if (options.mapRoot && !options.sourceMap) {
+                // Error to specify --mapRoot without --sourcemap
+                programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
             }
 
             if (options.declarationDir) {
diff --git a/tests/baselines/reference/optionsSourcemapInlineSourcesSourceRoot.errors.txt b/tests/baselines/reference/optionsSourcemapInlineSourcesSourceRoot.errors.txt
deleted file mode 100644
index bfa77ff5a3e..00000000000
--- a/tests/baselines/reference/optionsSourcemapInlineSourcesSourceRoot.errors.txt
+++ /dev/null
@@ -1,7 +0,0 @@
-error TS5053: Option 'sourceRoot' cannot be specified with option 'inlineSources'.
-
-
-!!! error TS5053: Option 'sourceRoot' cannot be specified with option 'inlineSources'.
-==== tests/cases/compiler/optionsSourcemapInlineSourcesSourceRoot.ts (0 errors) ====
-    
-    var a = 10;
\ No newline at end of file
diff --git a/tests/baselines/reference/optionsSourcemapInlineSourcesSourceRoot.symbols b/tests/baselines/reference/optionsSourcemapInlineSourcesSourceRoot.symbols
new file mode 100644
index 00000000000..76f2dc5fdc4
--- /dev/null
+++ b/tests/baselines/reference/optionsSourcemapInlineSourcesSourceRoot.symbols
@@ -0,0 +1,5 @@
+=== tests/cases/compiler/optionsSourcemapInlineSourcesSourceRoot.ts ===
+
+var a = 10;
+>a : Symbol(a, Decl(optionsSourcemapInlineSourcesSourceRoot.ts, 1, 3))
+
diff --git a/tests/baselines/reference/optionsSourcemapInlineSourcesSourceRoot.types b/tests/baselines/reference/optionsSourcemapInlineSourcesSourceRoot.types
new file mode 100644
index 00000000000..3689afc382c
--- /dev/null
+++ b/tests/baselines/reference/optionsSourcemapInlineSourcesSourceRoot.types
@@ -0,0 +1,6 @@
+=== tests/cases/compiler/optionsSourcemapInlineSourcesSourceRoot.ts ===
+
+var a = 10;
+>a : number
+>10 : number
+
diff --git a/tests/baselines/reference/project/mapRootSourceRootWithNoSourceMapOption/amd/mapRootSourceRootWithNoSourceMapOption.errors.txt b/tests/baselines/reference/project/mapRootSourceRootWithNoSourceMapOption/amd/mapRootSourceRootWithNoSourceMapOption.errors.txt
index 44d2c93d9a5..2a780bdeda0 100644
--- a/tests/baselines/reference/project/mapRootSourceRootWithNoSourceMapOption/amd/mapRootSourceRootWithNoSourceMapOption.errors.txt
+++ b/tests/baselines/reference/project/mapRootSourceRootWithNoSourceMapOption/amd/mapRootSourceRootWithNoSourceMapOption.errors.txt
@@ -1,9 +1,9 @@
+error TS5051: Option 'sourceRoot can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided.
 error TS5052: Option 'mapRoot' cannot be specified without specifying option 'sourceMap'.
-error TS5052: Option 'sourceRoot' cannot be specified without specifying option 'sourceMap'.
 
 
+!!! error TS5051: Option 'sourceRoot can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided.
 !!! error TS5052: Option 'mapRoot' cannot be specified without specifying option 'sourceMap'.
-!!! error TS5052: Option 'sourceRoot' cannot be specified without specifying option 'sourceMap'.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/mapRootSourceRootWithNoSourceMapOption/node/mapRootSourceRootWithNoSourceMapOption.errors.txt b/tests/baselines/reference/project/mapRootSourceRootWithNoSourceMapOption/node/mapRootSourceRootWithNoSourceMapOption.errors.txt
index 44d2c93d9a5..2a780bdeda0 100644
--- a/tests/baselines/reference/project/mapRootSourceRootWithNoSourceMapOption/node/mapRootSourceRootWithNoSourceMapOption.errors.txt
+++ b/tests/baselines/reference/project/mapRootSourceRootWithNoSourceMapOption/node/mapRootSourceRootWithNoSourceMapOption.errors.txt
@@ -1,9 +1,9 @@
+error TS5051: Option 'sourceRoot can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided.
 error TS5052: Option 'mapRoot' cannot be specified without specifying option 'sourceMap'.
-error TS5052: Option 'sourceRoot' cannot be specified without specifying option 'sourceMap'.
 
 
+!!! error TS5051: Option 'sourceRoot can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided.
 !!! error TS5052: Option 'mapRoot' cannot be specified without specifying option 'sourceMap'.
-!!! error TS5052: Option 'sourceRoot' cannot be specified without specifying option 'sourceMap'.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootWithNoSourceMapOption/amd/sourceRootWithNoSourceMapOption.errors.txt b/tests/baselines/reference/project/sourceRootWithNoSourceMapOption/amd/sourceRootWithNoSourceMapOption.errors.txt
index 56dab79dacf..b79cae049ff 100644
--- a/tests/baselines/reference/project/sourceRootWithNoSourceMapOption/amd/sourceRootWithNoSourceMapOption.errors.txt
+++ b/tests/baselines/reference/project/sourceRootWithNoSourceMapOption/amd/sourceRootWithNoSourceMapOption.errors.txt
@@ -1,7 +1,7 @@
-error TS5052: Option 'sourceRoot' cannot be specified without specifying option 'sourceMap'.
+error TS5051: Option 'sourceRoot can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided.
 
 
-!!! error TS5052: Option 'sourceRoot' cannot be specified without specifying option 'sourceMap'.
+!!! error TS5051: Option 'sourceRoot can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {
diff --git a/tests/baselines/reference/project/sourceRootWithNoSourceMapOption/node/sourceRootWithNoSourceMapOption.errors.txt b/tests/baselines/reference/project/sourceRootWithNoSourceMapOption/node/sourceRootWithNoSourceMapOption.errors.txt
index 56dab79dacf..b79cae049ff 100644
--- a/tests/baselines/reference/project/sourceRootWithNoSourceMapOption/node/sourceRootWithNoSourceMapOption.errors.txt
+++ b/tests/baselines/reference/project/sourceRootWithNoSourceMapOption/node/sourceRootWithNoSourceMapOption.errors.txt
@@ -1,7 +1,7 @@
-error TS5052: Option 'sourceRoot' cannot be specified without specifying option 'sourceMap'.
+error TS5051: Option 'sourceRoot can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided.
 
 
-!!! error TS5052: Option 'sourceRoot' cannot be specified without specifying option 'sourceMap'.
+!!! error TS5051: Option 'sourceRoot can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided.
 ==== m1.ts (0 errors) ====
     var m1_a1 = 10;
     class m1_c1 {

From 0c64b0c24e1d6c22f86e784afaafe144ba4b91e0 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Thu, 9 Jun 2016 12:29:13 -0700
Subject: [PATCH 236/332] this in parameter initializers resolves to class

Accept baselines now that the test passes.
---
 src/compiler/checker.ts                       |  2 +-
 ...inferParameterWithMethodCallInitializer.js | 30 +++++++++++++++++++
 ...ParameterWithMethodCallInitializer.symbols | 27 +++++++++++++++++
 ...erParameterWithMethodCallInitializer.types | 30 +++++++++++++++++++
 4 files changed, 88 insertions(+), 1 deletion(-)
 create mode 100644 tests/baselines/reference/inferParameterWithMethodCallInitializer.js
 create mode 100644 tests/baselines/reference/inferParameterWithMethodCallInitializer.symbols
 create mode 100644 tests/baselines/reference/inferParameterWithMethodCallInitializer.types

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 650bc488b0e..ba866c867e9 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -8392,7 +8392,7 @@ namespace ts {
             if (needToCaptureLexicalThis) {
                 captureLexicalThis(node, container);
             }
-            if (isFunctionLike(container)) {
+            if (isFunctionLike(container) && !isInParameterInitializerBeforeContainingFunction(node)) {
                 // If this is a function in a JS file, it might be a class method. Check if it's the RHS
                 // of a x.prototype.y = function [name]() { .... }
                 if (container.kind === SyntaxKind.FunctionExpression &&
diff --git a/tests/baselines/reference/inferParameterWithMethodCallInitializer.js b/tests/baselines/reference/inferParameterWithMethodCallInitializer.js
new file mode 100644
index 00000000000..6a5400ca19a
--- /dev/null
+++ b/tests/baselines/reference/inferParameterWithMethodCallInitializer.js
@@ -0,0 +1,30 @@
+//// [inferParameterWithMethodCallInitializer.ts]
+function getNumber(): number {
+    return 1;
+}
+class Example {
+    getNumber(): number {
+        return 1;
+    }
+    doSomething(a = this.getNumber()): typeof a {
+        return a;
+    }
+}
+
+
+//// [inferParameterWithMethodCallInitializer.js]
+function getNumber() {
+    return 1;
+}
+var Example = (function () {
+    function Example() {
+    }
+    Example.prototype.getNumber = function () {
+        return 1;
+    };
+    Example.prototype.doSomething = function (a) {
+        if (a === void 0) { a = this.getNumber(); }
+        return a;
+    };
+    return Example;
+}());
diff --git a/tests/baselines/reference/inferParameterWithMethodCallInitializer.symbols b/tests/baselines/reference/inferParameterWithMethodCallInitializer.symbols
new file mode 100644
index 00000000000..e4318fe1ead
--- /dev/null
+++ b/tests/baselines/reference/inferParameterWithMethodCallInitializer.symbols
@@ -0,0 +1,27 @@
+=== tests/cases/compiler/inferParameterWithMethodCallInitializer.ts ===
+function getNumber(): number {
+>getNumber : Symbol(getNumber, Decl(inferParameterWithMethodCallInitializer.ts, 0, 0))
+
+    return 1;
+}
+class Example {
+>Example : Symbol(Example, Decl(inferParameterWithMethodCallInitializer.ts, 2, 1))
+
+    getNumber(): number {
+>getNumber : Symbol(Example.getNumber, Decl(inferParameterWithMethodCallInitializer.ts, 3, 15))
+
+        return 1;
+    }
+    doSomething(a = this.getNumber()): typeof a {
+>doSomething : Symbol(Example.doSomething, Decl(inferParameterWithMethodCallInitializer.ts, 6, 5))
+>a : Symbol(a, Decl(inferParameterWithMethodCallInitializer.ts, 7, 16))
+>this.getNumber : Symbol(Example.getNumber, Decl(inferParameterWithMethodCallInitializer.ts, 3, 15))
+>this : Symbol(Example, Decl(inferParameterWithMethodCallInitializer.ts, 2, 1))
+>getNumber : Symbol(Example.getNumber, Decl(inferParameterWithMethodCallInitializer.ts, 3, 15))
+>a : Symbol(a, Decl(inferParameterWithMethodCallInitializer.ts, 7, 16))
+
+        return a;
+>a : Symbol(a, Decl(inferParameterWithMethodCallInitializer.ts, 7, 16))
+    }
+}
+
diff --git a/tests/baselines/reference/inferParameterWithMethodCallInitializer.types b/tests/baselines/reference/inferParameterWithMethodCallInitializer.types
new file mode 100644
index 00000000000..53c58e201b7
--- /dev/null
+++ b/tests/baselines/reference/inferParameterWithMethodCallInitializer.types
@@ -0,0 +1,30 @@
+=== tests/cases/compiler/inferParameterWithMethodCallInitializer.ts ===
+function getNumber(): number {
+>getNumber : () => number
+
+    return 1;
+>1 : number
+}
+class Example {
+>Example : Example
+
+    getNumber(): number {
+>getNumber : () => number
+
+        return 1;
+>1 : number
+    }
+    doSomething(a = this.getNumber()): typeof a {
+>doSomething : (a?: number) => number
+>a : number
+>this.getNumber() : number
+>this.getNumber : () => number
+>this : this
+>getNumber : () => number
+>a : number
+
+        return a;
+>a : number
+    }
+}
+

From 9fa971091ca8b078e556ae7f9e1eb31a5633e4cf Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 9 Jun 2016 12:46:52 -0700
Subject: [PATCH 237/332] Add tests for more kinds of import/export

---
 tests/baselines/reference/ambientShorthand.js |  6 ++--
 .../reference/ambientShorthand.symbols        |  6 +++-
 .../reference/ambientShorthand.types          |  8 +++--
 .../reference/ambientShorthand_reExport.js    | 30 +++++++++++++++++++
 .../ambientShorthand_reExport.symbols         | 22 ++++++++++++++
 .../reference/ambientShorthand_reExport.types | 23 ++++++++++++++
 .../conformance/ambient/ambientShorthand.ts   |  3 +-
 .../ambient/ambientShorthand_reExport.ts      | 14 +++++++++
 8 files changed, 106 insertions(+), 6 deletions(-)
 create mode 100644 tests/baselines/reference/ambientShorthand_reExport.js
 create mode 100644 tests/baselines/reference/ambientShorthand_reExport.symbols
 create mode 100644 tests/baselines/reference/ambientShorthand_reExport.types
 create mode 100644 tests/cases/conformance/ambient/ambientShorthand_reExport.ts

diff --git a/tests/baselines/reference/ambientShorthand.js b/tests/baselines/reference/ambientShorthand.js
index 624b0b84771..109264fc91b 100644
--- a/tests/baselines/reference/ambientShorthand.js
+++ b/tests/baselines/reference/ambientShorthand.js
@@ -9,7 +9,8 @@ declare module "fs";
 ///<reference path="declarations.d.ts"/>
 import foo, {bar} from "jquery";
 import * as baz from "fs";
-foo(bar, baz);
+import boom = require("jquery");
+foo(bar, baz, boom);
 
 
 //// [user.js]
@@ -17,4 +18,5 @@ foo(bar, baz);
 ///<reference path="declarations.d.ts"/>
 var jquery_1 = require("jquery");
 var baz = require("fs");
-jquery_1["default"](jquery_1.bar, baz);
+var boom = require("jquery");
+jquery_1["default"](jquery_1.bar, baz, boom);
diff --git a/tests/baselines/reference/ambientShorthand.symbols b/tests/baselines/reference/ambientShorthand.symbols
index 91cefe8d4c4..6747fd65173 100644
--- a/tests/baselines/reference/ambientShorthand.symbols
+++ b/tests/baselines/reference/ambientShorthand.symbols
@@ -7,10 +7,14 @@ import foo, {bar} from "jquery";
 import * as baz from "fs";
 >baz : Symbol(baz, Decl(user.ts, 2, 6))
 
-foo(bar, baz);
+import boom = require("jquery");
+>boom : Symbol(boom, Decl(user.ts, 2, 26))
+
+foo(bar, baz, boom);
 >foo : Symbol(foo, Decl(user.ts, 1, 6))
 >bar : Symbol(bar, Decl(user.ts, 1, 13))
 >baz : Symbol(baz, Decl(user.ts, 2, 6))
+>boom : Symbol(boom, Decl(user.ts, 2, 26))
 
 === tests/cases/conformance/ambient/declarations.d.ts ===
 declare module "jquery"
diff --git a/tests/baselines/reference/ambientShorthand.types b/tests/baselines/reference/ambientShorthand.types
index 12b18953e88..054349b1a6a 100644
--- a/tests/baselines/reference/ambientShorthand.types
+++ b/tests/baselines/reference/ambientShorthand.types
@@ -7,11 +7,15 @@ import foo, {bar} from "jquery";
 import * as baz from "fs";
 >baz : any
 
-foo(bar, baz);
->foo(bar, baz) : any
+import boom = require("jquery");
+>boom : any
+
+foo(bar, baz, boom);
+>foo(bar, baz, boom) : any
 >foo : any
 >bar : any
 >baz : any
+>boom : any
 
 === tests/cases/conformance/ambient/declarations.d.ts ===
 declare module "jquery"
diff --git a/tests/baselines/reference/ambientShorthand_reExport.js b/tests/baselines/reference/ambientShorthand_reExport.js
new file mode 100644
index 00000000000..d0433e5d478
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_reExport.js
@@ -0,0 +1,30 @@
+//// [tests/cases/conformance/ambient/ambientShorthand_reExport.ts] ////
+
+//// [declarations.d.ts]
+declare module "jquery";
+
+//// [reExportX.ts]
+export {x} from "jquery";
+
+//// [reExportAll.ts]
+export * from "jquery";
+
+//// [reExportUser.ts]
+import {x} from "./reExportX";
+import * as $ from "./reExportAll";
+// '$' is not callable, it is an object.
+x($);
+
+
+//// [reExportX.js]
+"use strict";
+var jquery_1 = require("jquery");
+exports.x = jquery_1.x;
+//// [reExportAll.js]
+"use strict";
+//// [reExportUser.js]
+"use strict";
+var reExportX_1 = require("./reExportX");
+var $ = require("./reExportAll");
+// '$' is not callable, it is an object.
+reExportX_1.x($);
diff --git a/tests/baselines/reference/ambientShorthand_reExport.symbols b/tests/baselines/reference/ambientShorthand_reExport.symbols
new file mode 100644
index 00000000000..1e8d5318011
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_reExport.symbols
@@ -0,0 +1,22 @@
+=== tests/cases/conformance/ambient/declarations.d.ts ===
+declare module "jquery";
+No type information for this code.
+No type information for this code.=== tests/cases/conformance/ambient/reExportX.ts ===
+export {x} from "jquery";
+>x : Symbol(x, Decl(reExportX.ts, 0, 8))
+
+=== tests/cases/conformance/ambient/reExportAll.ts ===
+export * from "jquery";
+No type information for this code.
+No type information for this code.=== tests/cases/conformance/ambient/reExportUser.ts ===
+import {x} from "./reExportX";
+>x : Symbol(x, Decl(reExportUser.ts, 0, 8))
+
+import * as $ from "./reExportAll";
+>$ : Symbol($, Decl(reExportUser.ts, 1, 6))
+
+// '$' is not callable, it is an object.
+x($);
+>x : Symbol(x, Decl(reExportUser.ts, 0, 8))
+>$ : Symbol($, Decl(reExportUser.ts, 1, 6))
+
diff --git a/tests/baselines/reference/ambientShorthand_reExport.types b/tests/baselines/reference/ambientShorthand_reExport.types
new file mode 100644
index 00000000000..5765c7e0331
--- /dev/null
+++ b/tests/baselines/reference/ambientShorthand_reExport.types
@@ -0,0 +1,23 @@
+=== tests/cases/conformance/ambient/declarations.d.ts ===
+declare module "jquery";
+No type information for this code.
+No type information for this code.=== tests/cases/conformance/ambient/reExportX.ts ===
+export {x} from "jquery";
+>x : any
+
+=== tests/cases/conformance/ambient/reExportAll.ts ===
+export * from "jquery";
+No type information for this code.
+No type information for this code.=== tests/cases/conformance/ambient/reExportUser.ts ===
+import {x} from "./reExportX";
+>x : any
+
+import * as $ from "./reExportAll";
+>$ : typeof $
+
+// '$' is not callable, it is an object.
+x($);
+>x($) : any
+>x : any
+>$ : typeof $
+
diff --git a/tests/cases/conformance/ambient/ambientShorthand.ts b/tests/cases/conformance/ambient/ambientShorthand.ts
index 3070abff595..35bb53a92cf 100644
--- a/tests/cases/conformance/ambient/ambientShorthand.ts
+++ b/tests/cases/conformance/ambient/ambientShorthand.ts
@@ -7,4 +7,5 @@ declare module "fs";
 ///<reference path="declarations.d.ts"/>
 import foo, {bar} from "jquery";
 import * as baz from "fs";
-foo(bar, baz);
+import boom = require("jquery");
+foo(bar, baz, boom);
diff --git a/tests/cases/conformance/ambient/ambientShorthand_reExport.ts b/tests/cases/conformance/ambient/ambientShorthand_reExport.ts
new file mode 100644
index 00000000000..b78afe42675
--- /dev/null
+++ b/tests/cases/conformance/ambient/ambientShorthand_reExport.ts
@@ -0,0 +1,14 @@
+// @Filename: declarations.d.ts
+declare module "jquery";
+
+// @Filename: reExportX.ts
+export {x} from "jquery";
+
+// @Filename: reExportAll.ts
+export * from "jquery";
+
+// @Filename: reExportUser.ts
+import {x} from "./reExportX";
+import * as $ from "./reExportAll";
+// '$' is not callable, it is an object.
+x($);

From 574a64dec9033ce1a026a51a93d77dfd97111be6 Mon Sep 17 00:00:00 2001
From: Yui <yuit@users.noreply.github.com>
Date: Thu, 9 Jun 2016 15:01:08 -0700
Subject: [PATCH 238/332] Fix7334 Disallow async in functionExpression and
 ArrowFunction (#9062)

* Error when using async modifier in function-expression and arrow-function when target es5

* Add tests and baselines
---
 src/compiler/checker.ts                       |  2 ++
 .../disallowAsyncModifierInES5.errors.txt     | 27 +++++++++++++++++++
 .../reference/disallowAsyncModifierInES5.js   | 22 +++++++++++++++
 .../compiler/disallowAsyncModifierInES5.ts    |  5 ++++
 4 files changed, 56 insertions(+)
 create mode 100644 tests/baselines/reference/disallowAsyncModifierInES5.errors.txt
 create mode 100644 tests/baselines/reference/disallowAsyncModifierInES5.js
 create mode 100644 tests/cases/compiler/disallowAsyncModifierInES5.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 33931ac304f..a60866b90f0 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -17794,6 +17794,8 @@ namespace ts {
                 case SyntaxKind.ImportEqualsDeclaration:
                 case SyntaxKind.ExportDeclaration:
                 case SyntaxKind.ExportAssignment:
+                case SyntaxKind.FunctionExpression:
+                case SyntaxKind.ArrowFunction:
                 case SyntaxKind.Parameter:
                     break;
                 case SyntaxKind.FunctionDeclaration:
diff --git a/tests/baselines/reference/disallowAsyncModifierInES5.errors.txt b/tests/baselines/reference/disallowAsyncModifierInES5.errors.txt
new file mode 100644
index 00000000000..655416f784c
--- /dev/null
+++ b/tests/baselines/reference/disallowAsyncModifierInES5.errors.txt
@@ -0,0 +1,27 @@
+error TS2318: Cannot find global type 'Promise'.
+tests/cases/compiler/disallowAsyncModifierInES5.ts(2,1): error TS1311: Async functions are only available when targeting ECMAScript 6 and higher.
+tests/cases/compiler/disallowAsyncModifierInES5.ts(2,16): error TS1057: An async function or method must have a valid awaitable return type.
+tests/cases/compiler/disallowAsyncModifierInES5.ts(3,11): error TS1057: An async function or method must have a valid awaitable return type.
+tests/cases/compiler/disallowAsyncModifierInES5.ts(3,11): error TS1311: Async functions are only available when targeting ECMAScript 6 and higher.
+tests/cases/compiler/disallowAsyncModifierInES5.ts(4,11): error TS1311: Async functions are only available when targeting ECMAScript 6 and higher.
+tests/cases/compiler/disallowAsyncModifierInES5.ts(4,11): error TS1057: An async function or method must have a valid awaitable return type.
+
+
+!!! error TS2318: Cannot find global type 'Promise'.
+==== tests/cases/compiler/disallowAsyncModifierInES5.ts (6 errors) ====
+    
+    async function foo() { return 42; } // ERROR: Async functions are only available in ES6+
+    ~~~~~
+!!! error TS1311: Async functions are only available when targeting ECMAScript 6 and higher.
+                   ~~~
+!!! error TS1057: An async function or method must have a valid awaitable return type.
+    let bar = async function () { return 42; } // OK, but should be an error
+              ~~~~~
+!!! error TS1057: An async function or method must have a valid awaitable return type.
+              ~~~~~
+!!! error TS1311: Async functions are only available when targeting ECMAScript 6 and higher.
+    let baz = async () => 42; // OK, but should be an error
+              ~~~~~
+!!! error TS1311: Async functions are only available when targeting ECMAScript 6 and higher.
+              ~~~~~~~~~~~~~~
+!!! error TS1057: An async function or method must have a valid awaitable return type.
\ No newline at end of file
diff --git a/tests/baselines/reference/disallowAsyncModifierInES5.js b/tests/baselines/reference/disallowAsyncModifierInES5.js
new file mode 100644
index 00000000000..8216e5fd0e6
--- /dev/null
+++ b/tests/baselines/reference/disallowAsyncModifierInES5.js
@@ -0,0 +1,22 @@
+//// [disallowAsyncModifierInES5.ts]
+
+async function foo() { return 42; } // ERROR: Async functions are only available in ES6+
+let bar = async function () { return 42; } // OK, but should be an error
+let baz = async () => 42; // OK, but should be an error
+
+//// [disallowAsyncModifierInES5.js]
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments)).next());
+    });
+};
+function foo() {
+    return __awaiter(this, void 0, void 0, function* () { return 42; });
+} // ERROR: Async functions are only available in ES6+
+var bar = function () {
+    return __awaiter(this, void 0, void 0, function* () { return 42; });
+}; // OK, but should be an error
+var baz = function () __awaiter(this, void 0, void 0, function* () { return 42; }); // OK, but should be an error
diff --git a/tests/cases/compiler/disallowAsyncModifierInES5.ts b/tests/cases/compiler/disallowAsyncModifierInES5.ts
new file mode 100644
index 00000000000..5417e678dce
--- /dev/null
+++ b/tests/cases/compiler/disallowAsyncModifierInES5.ts
@@ -0,0 +1,5 @@
+// @target: es5
+
+async function foo() { return 42; } // ERROR: Async functions are only available in ES6+
+let bar = async function () { return 42; } // OK, but should be an error
+let baz = async () => 42; // OK, but should be an error
\ No newline at end of file

From e307295fb95633e457cdcf5e30b544fa9d7d0b15 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Thu, 9 Jun 2016 15:20:51 -0700
Subject: [PATCH 239/332] Resolve function-this in parameter initialisers when
 explicitly provided

---
 src/compiler/checker.ts                       | 13 +++++++-
 ...inferParameterWithMethodCallInitializer.js | 21 +++++++++++++
 ...ParameterWithMethodCallInitializer.symbols | 28 +++++++++++++++++
 ...erParameterWithMethodCallInitializer.types | 30 +++++++++++++++++++
 ...inferParameterWithMethodCallInitializer.ts |  8 +++++
 5 files changed, 99 insertions(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index ba866c867e9..3842c05debf 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -8392,7 +8392,10 @@ namespace ts {
             if (needToCaptureLexicalThis) {
                 captureLexicalThis(node, container);
             }
-            if (isFunctionLike(container) && !isInParameterInitializerBeforeContainingFunction(node)) {
+            if (isFunctionLike(container) &&
+                (!isInParameterInitializerBeforeContainingFunction(node) || getFunctionLikeThisParameter(container))) {
+                // Note: a parameter initializer should refer to class-this unless function-this is explicitly annotated.
+
                 // If this is a function in a JS file, it might be a class method. Check if it's the RHS
                 // of a x.prototype.y = function [name]() { .... }
                 if (container.kind === SyntaxKind.FunctionExpression &&
@@ -18473,6 +18476,14 @@ namespace ts {
             }
         }
 
+        function getFunctionLikeThisParameter(func: FunctionLikeDeclaration) {
+            if (func.parameters.length &&
+                func.parameters[0].name.kind === SyntaxKind.Identifier &&
+                (<Identifier>func.parameters[0].name).originalKeywordKind === SyntaxKind.ThisKeyword) {
+                return func.parameters[0];
+            }
+        }
+
         function checkGrammarForNonSymbolComputedProperty(node: DeclarationName, message: DiagnosticMessage) {
             if (isDynamicName(node)) {
                 return grammarErrorOnNode(node, message);
diff --git a/tests/baselines/reference/inferParameterWithMethodCallInitializer.js b/tests/baselines/reference/inferParameterWithMethodCallInitializer.js
index 6a5400ca19a..5b33f78f766 100644
--- a/tests/baselines/reference/inferParameterWithMethodCallInitializer.js
+++ b/tests/baselines/reference/inferParameterWithMethodCallInitializer.js
@@ -10,6 +10,14 @@ class Example {
         return a;
     }
 }
+function weird(this: Example, a = this.getNumber()) {
+    return a;
+}
+class Weird {
+    doSomething(this: Example, a = this.getNumber()) {
+        return a;
+    }
+}
 
 
 //// [inferParameterWithMethodCallInitializer.js]
@@ -28,3 +36,16 @@ var Example = (function () {
     };
     return Example;
 }());
+function weird(a) {
+    if (a === void 0) { a = this.getNumber(); }
+    return a;
+}
+var Weird = (function () {
+    function Weird() {
+    }
+    Weird.prototype.doSomething = function (a) {
+        if (a === void 0) { a = this.getNumber(); }
+        return a;
+    };
+    return Weird;
+}());
diff --git a/tests/baselines/reference/inferParameterWithMethodCallInitializer.symbols b/tests/baselines/reference/inferParameterWithMethodCallInitializer.symbols
index e4318fe1ead..e0734a4b39b 100644
--- a/tests/baselines/reference/inferParameterWithMethodCallInitializer.symbols
+++ b/tests/baselines/reference/inferParameterWithMethodCallInitializer.symbols
@@ -24,4 +24,32 @@ class Example {
 >a : Symbol(a, Decl(inferParameterWithMethodCallInitializer.ts, 7, 16))
     }
 }
+function weird(this: Example, a = this.getNumber()) {
+>weird : Symbol(weird, Decl(inferParameterWithMethodCallInitializer.ts, 10, 1))
+>this : Symbol(this, Decl(inferParameterWithMethodCallInitializer.ts, 11, 15))
+>Example : Symbol(Example, Decl(inferParameterWithMethodCallInitializer.ts, 2, 1))
+>a : Symbol(a, Decl(inferParameterWithMethodCallInitializer.ts, 11, 29))
+>this.getNumber : Symbol(Example.getNumber, Decl(inferParameterWithMethodCallInitializer.ts, 3, 15))
+>this : Symbol(Example, Decl(inferParameterWithMethodCallInitializer.ts, 2, 1))
+>getNumber : Symbol(Example.getNumber, Decl(inferParameterWithMethodCallInitializer.ts, 3, 15))
+
+    return a;
+>a : Symbol(a, Decl(inferParameterWithMethodCallInitializer.ts, 11, 29))
+}
+class Weird {
+>Weird : Symbol(Weird, Decl(inferParameterWithMethodCallInitializer.ts, 13, 1))
+
+    doSomething(this: Example, a = this.getNumber()) {
+>doSomething : Symbol(Weird.doSomething, Decl(inferParameterWithMethodCallInitializer.ts, 14, 13))
+>this : Symbol(this, Decl(inferParameterWithMethodCallInitializer.ts, 15, 16))
+>Example : Symbol(Example, Decl(inferParameterWithMethodCallInitializer.ts, 2, 1))
+>a : Symbol(a, Decl(inferParameterWithMethodCallInitializer.ts, 15, 30))
+>this.getNumber : Symbol(Example.getNumber, Decl(inferParameterWithMethodCallInitializer.ts, 3, 15))
+>this : Symbol(Example, Decl(inferParameterWithMethodCallInitializer.ts, 2, 1))
+>getNumber : Symbol(Example.getNumber, Decl(inferParameterWithMethodCallInitializer.ts, 3, 15))
+
+        return a;
+>a : Symbol(a, Decl(inferParameterWithMethodCallInitializer.ts, 15, 30))
+    }
+}
 
diff --git a/tests/baselines/reference/inferParameterWithMethodCallInitializer.types b/tests/baselines/reference/inferParameterWithMethodCallInitializer.types
index 53c58e201b7..9aeccb2b2e0 100644
--- a/tests/baselines/reference/inferParameterWithMethodCallInitializer.types
+++ b/tests/baselines/reference/inferParameterWithMethodCallInitializer.types
@@ -27,4 +27,34 @@ class Example {
 >a : number
     }
 }
+function weird(this: Example, a = this.getNumber()) {
+>weird : (this: Example, a?: number) => number
+>this : Example
+>Example : Example
+>a : number
+>this.getNumber() : number
+>this.getNumber : () => number
+>this : Example
+>getNumber : () => number
+
+    return a;
+>a : number
+}
+class Weird {
+>Weird : Weird
+
+    doSomething(this: Example, a = this.getNumber()) {
+>doSomething : (this: Example, a?: number) => number
+>this : Example
+>Example : Example
+>a : number
+>this.getNumber() : number
+>this.getNumber : () => number
+>this : Example
+>getNumber : () => number
+
+        return a;
+>a : number
+    }
+}
 
diff --git a/tests/cases/compiler/inferParameterWithMethodCallInitializer.ts b/tests/cases/compiler/inferParameterWithMethodCallInitializer.ts
index ba38c7cb909..392709ccdf6 100644
--- a/tests/cases/compiler/inferParameterWithMethodCallInitializer.ts
+++ b/tests/cases/compiler/inferParameterWithMethodCallInitializer.ts
@@ -10,3 +10,11 @@ class Example {
         return a;
     }
 }
+function weird(this: Example, a = this.getNumber()) {
+    return a;
+}
+class Weird {
+    doSomething(this: Example, a = this.getNumber()) {
+        return a;
+    }
+}

From d387050aaab9f635ff3543563aced5c8a9a844db Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Thu, 9 Jun 2016 15:30:55 -0700
Subject: [PATCH 240/332] Fix merging issues and multiple project scenario

---
 src/compiler/program.ts      |  2 +-
 src/compiler/sys.ts          |  4 ++--
 src/server/editorServices.ts | 10 ++--------
 src/server/session.ts        | 20 +++++++++++---------
 4 files changed, 16 insertions(+), 20 deletions(-)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 8b38d56c2b2..99ca9377d54 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -1219,7 +1219,7 @@ namespace ts {
                 (oldOptions.noLib !== options.noLib) ||
                 (oldOptions.jsx !== options.jsx) ||
                 (oldOptions.allowJs !== options.allowJs) ||
-		(oldOptions.disableSizeLimit !== options.disableSizeLimit) ||
+                (oldOptions.disableSizeLimit !== options.disableSizeLimit) ||
                 (oldOptions.rootDir !== options.rootDir) ||
                 (oldOptions.typesSearchPaths !== options.typesSearchPaths) ||
                 (oldOptions.configFilePath !== options.configFilePath) ||
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 1e04e97e4c5..659c021c6be 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -28,7 +28,7 @@ namespace ts {
         getDirectories(path: string): string[];
         readDirectory(path: string, extension?: string, exclude?: string[]): string[];
         readDirectoryWithMultipleExtensions?(path: string, extensions: string[], exclude?: string[]): string[];
-	getModifiedTime?(path: string): Date;
+        getModifiedTime?(path: string): Date;
         createHash?(data: string): string;
         getMemoryUsage?(): number;
         exit(exitCode?: number): void;
@@ -549,7 +549,7 @@ namespace ts {
                 getDirectories,
                 readDirectory,
                 readDirectoryWithMultipleExtensions,
-		getModifiedTime(path) {
+                getModifiedTime(path) {
                     try {
                         return _fs.statSync(path).mtime;
                     }
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 9f361cb3703..bd29dc65ac4 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -1217,7 +1217,7 @@ namespace ts.server {
             else {
                 this.log("No config files found.");
             }
-	    this.log("end openOrUpdateConfiguredProjectForFile: " + new Date().getTime());
+            this.log("end openOrUpdateConfiguredProjectForFile: " + new Date().getTime());
             return configFileName ? { configFileName } : {};
         }
 
@@ -1398,7 +1398,7 @@ namespace ts.server {
             }
         }
 
-        updateConfiguredProject(project: Project) {
+        updateConfiguredProject(project: Project): Diagnostic[] {
             if (!this.host.fileExists(project.projectFilename)) {
                 this.log("Config file deleted");
                 this.removeProject(project);
@@ -1434,9 +1434,6 @@ namespace ts.server {
                                 const info = this.openFile(rootFilename, /*openedByClient*/ false);
                                 project.addRoot(info);
                             }
-                            else {
-                                return { errorMsg: "specified file " + rootFilename + " not found" };
-                            }
                         }
                         project.finishGraph();
                         return;
@@ -1460,9 +1457,6 @@ namespace ts.server {
                     for (const fileName of fileNamesToAdd) {
                         let info = this.getScriptInfo(fileName);
                         if (!info) {
-                            if (!this.host.fileExists(info.fileName)) {
-                                return { errorMsg: "specified file " + info.fileName + " not found" };
-                            }
                             info = this.openFile(fileName, /*openedByClient*/ false);
                         }
                         else {
diff --git a/src/server/session.ts b/src/server/session.ts
index 6f07e979906..17fe4b758f2 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -444,11 +444,12 @@ namespace ts.server {
             const file = ts.normalizePath(fileName);
             const info = this.projectService.getScriptInfo(file);
             const projects = this.projectService.findReferencingProjects(info);
-            if (!projects.length) {
+            const projectsWithLanguageServiceEnabeld = ts.filter(projects, p => !p.languageServiceDiabled);
+            if (projects.length === 0 || projectsWithLanguageServiceEnabeld.length === 0) {
                 throw Errors.NoProject;
             }
 
-            const defaultProject = projects[0];
+            const defaultProject = projectsWithLanguageServiceEnabeld[0];
             // The rename info should be the same for every project
             const defaultProjectCompilerService = defaultProject.compilerService;
             const position = defaultProjectCompilerService.host.lineOffsetToPosition(file, line, offset);
@@ -465,7 +466,7 @@ namespace ts.server {
             }
 
             const fileSpans = combineProjectOutput(
-                projects,
+                projectsWithLanguageServiceEnabeld,
                 (project: Project) => {
                     const compilerService = project.compilerService;
                     const renameLocations = compilerService.languageService.findRenameLocations(file, position, findInStrings, findInComments);
@@ -526,11 +527,12 @@ namespace ts.server {
             const file = ts.normalizePath(fileName);
             const info = this.projectService.getScriptInfo(file);
             const projects = this.projectService.findReferencingProjects(info);
-            if (!projects.length) {
+            const projectsWithLanguageServiceEnabeld = ts.filter(projects, p => !p.languageServiceDiabled);
+            if (projects.length === 0 || projectsWithLanguageServiceEnabeld.length === 0) {
                 throw Errors.NoProject;
             }
 
-            const defaultProject = projects[0];
+            const defaultProject = projectsWithLanguageServiceEnabeld[0];
             const position = defaultProject.compilerService.host.lineOffsetToPosition(file, line, offset);
             const nameInfo = defaultProject.compilerService.languageService.getQuickInfoAtPosition(file, position);
             if (!nameInfo) {
@@ -542,7 +544,7 @@ namespace ts.server {
             const nameColStart = defaultProject.compilerService.host.positionToLineOffset(file, nameSpan.start).offset;
             const nameText = defaultProject.compilerService.host.getScriptSnapshot(file).getText(nameSpan.start, ts.textSpanEnd(nameSpan));
             const refs = combineProjectOutput<protocol.ReferencesResponseItem>(
-                projects,
+                projectsWithLanguageServiceEnabeld,
                 (project: Project) => {
                     const compilerService = project.compilerService;
                     const references = compilerService.languageService.getReferencesAtPosition(file, position);
@@ -902,13 +904,13 @@ namespace ts.server {
             const file = ts.normalizePath(fileName);
             const info = this.projectService.getScriptInfo(file);
             const projects = this.projectService.findReferencingProjects(info);
-            const defaultProject = projects[0];
-            if (!defaultProject) {
+            const projectsWithLanguageServiceEnabeld = ts.filter(projects, p => !p.languageServiceDiabled);
+            if (projects.length === 0 || projectsWithLanguageServiceEnabeld.length === 0) {
                 throw Errors.NoProject;
             }
 
             const allNavToItems = combineProjectOutput(
-                projects,
+                projectsWithLanguageServiceEnabeld,
                 (project: Project) => {
                     const compilerService = project.compilerService;
                     const navItems = compilerService.languageService.getNavigateToItems(searchValue, maxResultCount);

From a1e4b31d160b11ac4b579b34892ad8e05b64bc42 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Thu, 9 Jun 2016 15:48:35 -0700
Subject: [PATCH 241/332] Allow null/undefined guard with null/undefined on
 left

Also add a test with baselines.
---
 src/compiler/binder.ts                        |  5 ++-
 src/compiler/checker.ts                       | 10 +++--
 ...lOrUndefinedTypeGuardIsOrderIndependent.js | 30 +++++++++++++
 ...definedTypeGuardIsOrderIndependent.symbols | 34 +++++++++++++++
 ...UndefinedTypeGuardIsOrderIndependent.types | 43 +++++++++++++++++++
 ...typeGuardOfFormTypeOfIsOrderIndependent.js |  2 -
 ...uardOfFormTypeOfIsOrderIndependent.symbols |  1 -
 ...eGuardOfFormTypeOfIsOrderIndependent.types |  1 -
 ...lOrUndefinedTypeGuardIsOrderIndependent.ts | 14 ++++++
 ...typeGuardOfFormTypeOfIsOrderIndependent.ts |  1 -
 10 files changed, 130 insertions(+), 11 deletions(-)
 create mode 100644 tests/baselines/reference/nullOrUndefinedTypeGuardIsOrderIndependent.js
 create mode 100644 tests/baselines/reference/nullOrUndefinedTypeGuardIsOrderIndependent.symbols
 create mode 100644 tests/baselines/reference/nullOrUndefinedTypeGuardIsOrderIndependent.types
 create mode 100644 tests/cases/conformance/expressions/typeGuards/nullOrUndefinedTypeGuardIsOrderIndependent.ts

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index bfc9b07697b..96213801264 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -609,7 +609,8 @@ namespace ts {
                 case SyntaxKind.ExclamationEqualsToken:
                 case SyntaxKind.EqualsEqualsEqualsToken:
                 case SyntaxKind.ExclamationEqualsEqualsToken:
-                    if (isNarrowingExpression(expr.left) && (expr.right.kind === SyntaxKind.NullKeyword || expr.right.kind === SyntaxKind.Identifier)) {
+                    if ((isNarrowingExpression(expr.left) && (expr.right.kind === SyntaxKind.NullKeyword || expr.right.kind === SyntaxKind.Identifier)) ||
+                        (isNarrowingExpression(expr.right) && (expr.left.kind === SyntaxKind.NullKeyword || expr.left.kind === SyntaxKind.Identifier))) {
                         return true;
                     }
                     if (isTypeOfNarrowingBinaryExpression(expr)) {
@@ -633,7 +634,7 @@ namespace ts {
                 typeOf = expr.left;
             }
             else {
-                typeOf = undefined;;
+                typeOf = undefined;
             }
             return typeOf && typeOf.kind === SyntaxKind.TypeOfExpression && isNarrowingExpression((<TypeOfExpression>typeOf).expression);
         }
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index dbc2c920dbb..281bac29914 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7861,7 +7861,7 @@ namespace ts {
                     case SyntaxKind.ExclamationEqualsToken:
                     case SyntaxKind.EqualsEqualsEqualsToken:
                     case SyntaxKind.ExclamationEqualsEqualsToken:
-                        if (isNullOrUndefinedLiteral(expr.right)) {
+                        if (isNullOrUndefinedLiteral(expr.left) || isNullOrUndefinedLiteral(expr.right)) {
                             return narrowTypeByNullCheck(type, expr, assumeTrue);
                         }
                         if (expr.left.kind === SyntaxKind.TypeOfExpression && expr.right.kind === SyntaxKind.StringLiteral ||
@@ -7878,18 +7878,20 @@ namespace ts {
             }
 
             function narrowTypeByNullCheck(type: Type, expr: BinaryExpression, assumeTrue: boolean): Type {
-                // We have '==', '!=', '===', or '!==' operator with 'null' or 'undefined' on the right
+                // We have '==', '!=', '===', or '!==' operator with 'null' or 'undefined' on one side
                 const operator = expr.operatorToken.kind;
+                const nullLike = isNullOrUndefinedLiteral(expr.left) ? expr.left : expr.right;
+                const narrowed = isNullOrUndefinedLiteral(expr.left) ? expr.right : expr.left;
                 if (operator === SyntaxKind.ExclamationEqualsToken || operator === SyntaxKind.ExclamationEqualsEqualsToken) {
                     assumeTrue = !assumeTrue;
                 }
-                if (!strictNullChecks || !isMatchingReference(reference, expr.left)) {
+                if (!strictNullChecks || !isMatchingReference(reference, narrowed)) {
                     return type;
                 }
                 const doubleEquals = operator === SyntaxKind.EqualsEqualsToken || operator === SyntaxKind.ExclamationEqualsToken;
                 const facts = doubleEquals ?
                     assumeTrue ? TypeFacts.EQUndefinedOrNull : TypeFacts.NEUndefinedOrNull :
-                    expr.right.kind === SyntaxKind.NullKeyword ?
+                    nullLike.kind === SyntaxKind.NullKeyword ?
                         assumeTrue ? TypeFacts.EQNull : TypeFacts.NENull :
                         assumeTrue ? TypeFacts.EQUndefined : TypeFacts.NEUndefined;
                 return getTypeWithFacts(type, facts);
diff --git a/tests/baselines/reference/nullOrUndefinedTypeGuardIsOrderIndependent.js b/tests/baselines/reference/nullOrUndefinedTypeGuardIsOrderIndependent.js
new file mode 100644
index 00000000000..f62bd2a3f11
--- /dev/null
+++ b/tests/baselines/reference/nullOrUndefinedTypeGuardIsOrderIndependent.js
@@ -0,0 +1,30 @@
+//// [nullOrUndefinedTypeGuardIsOrderIndependent.ts]
+function test(strOrNull: string | null, strOrUndefined: string | undefined) {
+    var str: string = "original";
+    var nil: null;
+    if (null === strOrNull) {
+        nil = strOrNull;
+    }
+    else {
+        str = strOrNull;
+    }
+    if (undefined !== strOrUndefined) {
+        str = strOrUndefined;
+    }
+}
+
+
+//// [nullOrUndefinedTypeGuardIsOrderIndependent.js]
+function test(strOrNull, strOrUndefined) {
+    var str = "original";
+    var nil;
+    if (null === strOrNull) {
+        nil = strOrNull;
+    }
+    else {
+        str = strOrNull;
+    }
+    if (undefined !== strOrUndefined) {
+        str = strOrUndefined;
+    }
+}
diff --git a/tests/baselines/reference/nullOrUndefinedTypeGuardIsOrderIndependent.symbols b/tests/baselines/reference/nullOrUndefinedTypeGuardIsOrderIndependent.symbols
new file mode 100644
index 00000000000..bb1d1843289
--- /dev/null
+++ b/tests/baselines/reference/nullOrUndefinedTypeGuardIsOrderIndependent.symbols
@@ -0,0 +1,34 @@
+=== tests/cases/conformance/expressions/typeGuards/nullOrUndefinedTypeGuardIsOrderIndependent.ts ===
+function test(strOrNull: string | null, strOrUndefined: string | undefined) {
+>test : Symbol(test, Decl(nullOrUndefinedTypeGuardIsOrderIndependent.ts, 0, 0))
+>strOrNull : Symbol(strOrNull, Decl(nullOrUndefinedTypeGuardIsOrderIndependent.ts, 0, 14))
+>strOrUndefined : Symbol(strOrUndefined, Decl(nullOrUndefinedTypeGuardIsOrderIndependent.ts, 0, 39))
+
+    var str: string = "original";
+>str : Symbol(str, Decl(nullOrUndefinedTypeGuardIsOrderIndependent.ts, 1, 7))
+
+    var nil: null;
+>nil : Symbol(nil, Decl(nullOrUndefinedTypeGuardIsOrderIndependent.ts, 2, 7))
+
+    if (null === strOrNull) {
+>strOrNull : Symbol(strOrNull, Decl(nullOrUndefinedTypeGuardIsOrderIndependent.ts, 0, 14))
+
+        nil = strOrNull;
+>nil : Symbol(nil, Decl(nullOrUndefinedTypeGuardIsOrderIndependent.ts, 2, 7))
+>strOrNull : Symbol(strOrNull, Decl(nullOrUndefinedTypeGuardIsOrderIndependent.ts, 0, 14))
+    }
+    else {
+        str = strOrNull;
+>str : Symbol(str, Decl(nullOrUndefinedTypeGuardIsOrderIndependent.ts, 1, 7))
+>strOrNull : Symbol(strOrNull, Decl(nullOrUndefinedTypeGuardIsOrderIndependent.ts, 0, 14))
+    }
+    if (undefined !== strOrUndefined) {
+>undefined : Symbol(undefined)
+>strOrUndefined : Symbol(strOrUndefined, Decl(nullOrUndefinedTypeGuardIsOrderIndependent.ts, 0, 39))
+
+        str = strOrUndefined;
+>str : Symbol(str, Decl(nullOrUndefinedTypeGuardIsOrderIndependent.ts, 1, 7))
+>strOrUndefined : Symbol(strOrUndefined, Decl(nullOrUndefinedTypeGuardIsOrderIndependent.ts, 0, 39))
+    }
+}
+
diff --git a/tests/baselines/reference/nullOrUndefinedTypeGuardIsOrderIndependent.types b/tests/baselines/reference/nullOrUndefinedTypeGuardIsOrderIndependent.types
new file mode 100644
index 00000000000..f599366e66e
--- /dev/null
+++ b/tests/baselines/reference/nullOrUndefinedTypeGuardIsOrderIndependent.types
@@ -0,0 +1,43 @@
+=== tests/cases/conformance/expressions/typeGuards/nullOrUndefinedTypeGuardIsOrderIndependent.ts ===
+function test(strOrNull: string | null, strOrUndefined: string | undefined) {
+>test : (strOrNull: string | null, strOrUndefined: string | undefined) => void
+>strOrNull : string | null
+>null : null
+>strOrUndefined : string | undefined
+
+    var str: string = "original";
+>str : string
+>"original" : string
+
+    var nil: null;
+>nil : null
+>null : null
+
+    if (null === strOrNull) {
+>null === strOrNull : boolean
+>null : null
+>strOrNull : string | null
+
+        nil = strOrNull;
+>nil = strOrNull : null
+>nil : null
+>strOrNull : null
+    }
+    else {
+        str = strOrNull;
+>str = strOrNull : string
+>str : string
+>strOrNull : string
+    }
+    if (undefined !== strOrUndefined) {
+>undefined !== strOrUndefined : boolean
+>undefined : undefined
+>strOrUndefined : string | undefined
+
+        str = strOrUndefined;
+>str = strOrUndefined : string
+>str : string
+>strOrUndefined : string
+    }
+}
+
diff --git a/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.js b/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.js
index 5ea7932e89a..7d9a1651f08 100644
--- a/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.js
+++ b/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.js
@@ -9,7 +9,6 @@ var bool: boolean;
 var func: () => void;
 
 if ("string" === typeof strOrNum) {
-// if (typeof strOrNum === "string") {
     str = strOrNum;
 }
 else {
@@ -45,7 +44,6 @@ var num;
 var bool;
 var func;
 if ("string" === typeof strOrNum) {
-    // if (typeof strOrNum === "string") {
     str = strOrNum;
 }
 else {
diff --git a/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.symbols b/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.symbols
index d75774eba45..f33908631a4 100644
--- a/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.symbols
+++ b/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.symbols
@@ -26,7 +26,6 @@ var func: () => void;
 if ("string" === typeof strOrNum) {
 >strOrNum : Symbol(strOrNum, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 0, 3))
 
-// if (typeof strOrNum === "string") {
     str = strOrNum;
 >str : Symbol(str, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 4, 3))
 >strOrNum : Symbol(strOrNum, Decl(typeGuardOfFormTypeOfIsOrderIndependent.ts, 0, 3))
diff --git a/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.types b/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.types
index 592d147f386..2d91abb9613 100644
--- a/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.types
+++ b/tests/baselines/reference/typeGuardOfFormTypeOfIsOrderIndependent.types
@@ -29,7 +29,6 @@ if ("string" === typeof strOrNum) {
 >typeof strOrNum : string
 >strOrNum : string | number
 
-// if (typeof strOrNum === "string") {
     str = strOrNum;
 >str = strOrNum : string
 >str : string
diff --git a/tests/cases/conformance/expressions/typeGuards/nullOrUndefinedTypeGuardIsOrderIndependent.ts b/tests/cases/conformance/expressions/typeGuards/nullOrUndefinedTypeGuardIsOrderIndependent.ts
new file mode 100644
index 00000000000..2da52406609
--- /dev/null
+++ b/tests/cases/conformance/expressions/typeGuards/nullOrUndefinedTypeGuardIsOrderIndependent.ts
@@ -0,0 +1,14 @@
+// @strictNullChecks: true
+function test(strOrNull: string | null, strOrUndefined: string | undefined) {
+    var str: string = "original";
+    var nil: null;
+    if (null === strOrNull) {
+        nil = strOrNull;
+    }
+    else {
+        str = strOrNull;
+    }
+    if (undefined !== strOrUndefined) {
+        str = strOrUndefined;
+    }
+}
diff --git a/tests/cases/conformance/expressions/typeGuards/typeGuardOfFormTypeOfIsOrderIndependent.ts b/tests/cases/conformance/expressions/typeGuards/typeGuardOfFormTypeOfIsOrderIndependent.ts
index 79fcf49e245..b7a5caf41da 100644
--- a/tests/cases/conformance/expressions/typeGuards/typeGuardOfFormTypeOfIsOrderIndependent.ts
+++ b/tests/cases/conformance/expressions/typeGuards/typeGuardOfFormTypeOfIsOrderIndependent.ts
@@ -8,7 +8,6 @@ var bool: boolean;
 var func: () => void;
 
 if ("string" === typeof strOrNum) {
-// if (typeof strOrNum === "string") {
     str = strOrNum;
 }
 else {

From f0a430aef8c582549be6e4956488bc79ccae532c Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Thu, 9 Jun 2016 15:52:17 -0700
Subject: [PATCH 242/332] Code review comments

---
 .../reference/es6modulekindWithES5Target.js   |  7 ++++-
 .../es6modulekindWithES5Target.symbols        | 24 ++++++++------
 .../es6modulekindWithES5Target.types          |  6 ++++
 .../reference/es6modulekindWithES5Target11.js | 31 +++++++++++++++++++
 .../es6modulekindWithES5Target11.symbols      | 27 ++++++++++++++++
 .../es6modulekindWithES5Target11.types        | 29 +++++++++++++++++
 .../es6modulekindWithES5Target9.errors.txt    |  8 +++--
 .../reference/es6modulekindWithES5Target9.js  |  7 +++++
 .../compiler/es6modulekindWithES5Target.ts    |  4 ++-
 .../compiler/es6modulekindWithES5Target11.ts  | 12 +++++++
 .../compiler/es6modulekindWithES5Target9.ts   |  4 +++
 11 files changed, 146 insertions(+), 13 deletions(-)
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target11.js
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target11.symbols
 create mode 100644 tests/baselines/reference/es6modulekindWithES5Target11.types
 create mode 100644 tests/cases/compiler/es6modulekindWithES5Target11.ts

diff --git a/tests/baselines/reference/es6modulekindWithES5Target.js b/tests/baselines/reference/es6modulekindWithES5Target.js
index bab55ec7a2c..cdd1bb018d4 100644
--- a/tests/baselines/reference/es6modulekindWithES5Target.js
+++ b/tests/baselines/reference/es6modulekindWithES5Target.js
@@ -5,6 +5,7 @@ export class C {
     p = 1;
     method() { }
 }
+export { C as C2 };
 
 declare function foo(...args: any[]): any;
 @foo
@@ -13,9 +14,11 @@ export class D {
     p = 1;
     method() { }
 }
+export { D as D2 };
 
 class E { }
-export {E};
+export {E};
+
 
 //// [es6modulekindWithES5Target.js]
 var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
@@ -32,6 +35,7 @@ export var C = (function () {
     C.s = 0;
     return C;
 }());
+export { C as C2 };
 export var D = (function () {
     function D() {
         this.p = 1;
@@ -43,6 +47,7 @@ export var D = (function () {
     ], D);
     return D;
 }());
+export { D as D2 };
 var E = (function () {
     function E() {
     }
diff --git a/tests/baselines/reference/es6modulekindWithES5Target.symbols b/tests/baselines/reference/es6modulekindWithES5Target.symbols
index 4fe53ced68d..2d2a3f6732c 100644
--- a/tests/baselines/reference/es6modulekindWithES5Target.symbols
+++ b/tests/baselines/reference/es6modulekindWithES5Target.symbols
@@ -12,30 +12,36 @@ export class C {
     method() { }
 >method : Symbol(C.method, Decl(es6modulekindWithES5Target.ts, 3, 10))
 }
+export { C as C2 };
+>C : Symbol(C2, Decl(es6modulekindWithES5Target.ts, 6, 8))
+>C2 : Symbol(C2, Decl(es6modulekindWithES5Target.ts, 6, 8))
 
 declare function foo(...args: any[]): any;
->foo : Symbol(foo, Decl(es6modulekindWithES5Target.ts, 5, 1))
->args : Symbol(args, Decl(es6modulekindWithES5Target.ts, 7, 21))
+>foo : Symbol(foo, Decl(es6modulekindWithES5Target.ts, 6, 19))
+>args : Symbol(args, Decl(es6modulekindWithES5Target.ts, 8, 21))
 
 @foo
->foo : Symbol(foo, Decl(es6modulekindWithES5Target.ts, 5, 1))
+>foo : Symbol(foo, Decl(es6modulekindWithES5Target.ts, 6, 19))
 
 export class D {
->D : Symbol(D, Decl(es6modulekindWithES5Target.ts, 7, 42))
+>D : Symbol(D, Decl(es6modulekindWithES5Target.ts, 8, 42))
 
     static s = 0;
->s : Symbol(D.s, Decl(es6modulekindWithES5Target.ts, 9, 16))
+>s : Symbol(D.s, Decl(es6modulekindWithES5Target.ts, 10, 16))
 
     p = 1;
->p : Symbol(D.p, Decl(es6modulekindWithES5Target.ts, 10, 17))
+>p : Symbol(D.p, Decl(es6modulekindWithES5Target.ts, 11, 17))
 
     method() { }
->method : Symbol(D.method, Decl(es6modulekindWithES5Target.ts, 11, 10))
+>method : Symbol(D.method, Decl(es6modulekindWithES5Target.ts, 12, 10))
 }
+export { D as D2 };
+>D : Symbol(D2, Decl(es6modulekindWithES5Target.ts, 15, 8))
+>D2 : Symbol(D2, Decl(es6modulekindWithES5Target.ts, 15, 8))
 
 class E { }
->E : Symbol(E, Decl(es6modulekindWithES5Target.ts, 13, 1))
+>E : Symbol(E, Decl(es6modulekindWithES5Target.ts, 15, 19))
 
 export {E};
->E : Symbol(E, Decl(es6modulekindWithES5Target.ts, 16, 8))
+>E : Symbol(E, Decl(es6modulekindWithES5Target.ts, 18, 8))
 
diff --git a/tests/baselines/reference/es6modulekindWithES5Target.types b/tests/baselines/reference/es6modulekindWithES5Target.types
index 14e0533faaa..f7232f20494 100644
--- a/tests/baselines/reference/es6modulekindWithES5Target.types
+++ b/tests/baselines/reference/es6modulekindWithES5Target.types
@@ -14,6 +14,9 @@ export class C {
     method() { }
 >method : () => void
 }
+export { C as C2 };
+>C : typeof C
+>C2 : typeof C
 
 declare function foo(...args: any[]): any;
 >foo : (...args: any[]) => any
@@ -36,6 +39,9 @@ export class D {
     method() { }
 >method : () => void
 }
+export { D as D2 };
+>D : typeof D
+>D2 : typeof D
 
 class E { }
 >E : E
diff --git a/tests/baselines/reference/es6modulekindWithES5Target11.js b/tests/baselines/reference/es6modulekindWithES5Target11.js
new file mode 100644
index 00000000000..67196ba2054
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target11.js
@@ -0,0 +1,31 @@
+//// [es6modulekindWithES5Target11.ts]
+
+declare function foo(...args: any[]): any;
+@foo
+export default class C {
+    static x() { return C.y; }
+    static y = 1
+    p = 1;
+    method() { }
+}
+
+//// [es6modulekindWithES5Target11.js]
+var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+};
+var C = (function () {
+    function C() {
+        this.p = 1;
+    }
+    C.x = function () { return C.y; };
+    C.prototype.method = function () { };
+    C.y = 1;
+    C = __decorate([
+        foo
+    ], C);
+    return C;
+}());
+export default C;
diff --git a/tests/baselines/reference/es6modulekindWithES5Target11.symbols b/tests/baselines/reference/es6modulekindWithES5Target11.symbols
new file mode 100644
index 00000000000..144d306c5fb
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target11.symbols
@@ -0,0 +1,27 @@
+=== tests/cases/compiler/es6modulekindWithES5Target11.ts ===
+
+declare function foo(...args: any[]): any;
+>foo : Symbol(foo, Decl(es6modulekindWithES5Target11.ts, 0, 0))
+>args : Symbol(args, Decl(es6modulekindWithES5Target11.ts, 1, 21))
+
+@foo
+>foo : Symbol(foo, Decl(es6modulekindWithES5Target11.ts, 0, 0))
+
+export default class C {
+>C : Symbol(C, Decl(es6modulekindWithES5Target11.ts, 1, 42))
+
+    static x() { return C.y; }
+>x : Symbol(C.x, Decl(es6modulekindWithES5Target11.ts, 3, 24))
+>C.y : Symbol(C.y, Decl(es6modulekindWithES5Target11.ts, 4, 30))
+>C : Symbol(C, Decl(es6modulekindWithES5Target11.ts, 1, 42))
+>y : Symbol(C.y, Decl(es6modulekindWithES5Target11.ts, 4, 30))
+
+    static y = 1
+>y : Symbol(C.y, Decl(es6modulekindWithES5Target11.ts, 4, 30))
+
+    p = 1;
+>p : Symbol(C.p, Decl(es6modulekindWithES5Target11.ts, 5, 16))
+
+    method() { }
+>method : Symbol(C.method, Decl(es6modulekindWithES5Target11.ts, 6, 10))
+}
diff --git a/tests/baselines/reference/es6modulekindWithES5Target11.types b/tests/baselines/reference/es6modulekindWithES5Target11.types
new file mode 100644
index 00000000000..51fbe371017
--- /dev/null
+++ b/tests/baselines/reference/es6modulekindWithES5Target11.types
@@ -0,0 +1,29 @@
+=== tests/cases/compiler/es6modulekindWithES5Target11.ts ===
+
+declare function foo(...args: any[]): any;
+>foo : (...args: any[]) => any
+>args : any[]
+
+@foo
+>foo : (...args: any[]) => any
+
+export default class C {
+>C : C
+
+    static x() { return C.y; }
+>x : () => number
+>C.y : number
+>C : typeof C
+>y : number
+
+    static y = 1
+>y : number
+>1 : number
+
+    p = 1;
+>p : number
+>1 : number
+
+    method() { }
+>method : () => void
+}
diff --git a/tests/baselines/reference/es6modulekindWithES5Target9.errors.txt b/tests/baselines/reference/es6modulekindWithES5Target9.errors.txt
index 696b28a30e8..2e9a35a8783 100644
--- a/tests/baselines/reference/es6modulekindWithES5Target9.errors.txt
+++ b/tests/baselines/reference/es6modulekindWithES5Target9.errors.txt
@@ -1,8 +1,8 @@
 tests/cases/compiler/es6modulekindWithES5Target9.ts(2,15): error TS2307: Cannot find module 'mod'.
 tests/cases/compiler/es6modulekindWithES5Target9.ts(4,17): error TS2307: Cannot find module 'mod'.
 tests/cases/compiler/es6modulekindWithES5Target9.ts(6,20): error TS2307: Cannot find module 'mod'.
-tests/cases/compiler/es6modulekindWithES5Target9.ts(10,15): error TS2307: Cannot find module 'mod'.
-tests/cases/compiler/es6modulekindWithES5Target9.ts(12,17): error TS2307: Cannot find module 'mod'.
+tests/cases/compiler/es6modulekindWithES5Target9.ts(14,15): error TS2307: Cannot find module 'mod'.
+tests/cases/compiler/es6modulekindWithES5Target9.ts(16,17): error TS2307: Cannot find module 'mod'.
 
 
 ==== tests/cases/compiler/es6modulekindWithES5Target9.ts (5 errors) ====
@@ -21,6 +21,10 @@ tests/cases/compiler/es6modulekindWithES5Target9.ts(12,17): error TS2307: Cannot
     
     export {a};
     
+    export {M};
+    
+    export {d};
+    
     export * from "mod";
                   ~~~~~
 !!! error TS2307: Cannot find module 'mod'.
diff --git a/tests/baselines/reference/es6modulekindWithES5Target9.js b/tests/baselines/reference/es6modulekindWithES5Target9.js
index a9569c42dd9..97991b40b0c 100644
--- a/tests/baselines/reference/es6modulekindWithES5Target9.js
+++ b/tests/baselines/reference/es6modulekindWithES5Target9.js
@@ -8,6 +8,10 @@ import * as M from "mod";
 
 export {a};
 
+export {M};
+
+export {d};
+
 export * from "mod";
 
 export {b} from "mod"
@@ -18,7 +22,10 @@ export default d;
 //// [es6modulekindWithES5Target9.js]
 import d from "mod";
 import { a } from "mod";
+import * as M from "mod";
 export { a };
+export { M };
+export { d };
 export * from "mod";
 export { b } from "mod";
 export default d;
diff --git a/tests/cases/compiler/es6modulekindWithES5Target.ts b/tests/cases/compiler/es6modulekindWithES5Target.ts
index 72117932229..c5ecfdab686 100644
--- a/tests/cases/compiler/es6modulekindWithES5Target.ts
+++ b/tests/cases/compiler/es6modulekindWithES5Target.ts
@@ -7,6 +7,7 @@ export class C {
     p = 1;
     method() { }
 }
+export { C as C2 };
 
 declare function foo(...args: any[]): any;
 @foo
@@ -15,6 +16,7 @@ export class D {
     p = 1;
     method() { }
 }
+export { D as D2 };
 
 class E { }
-export {E};
\ No newline at end of file
+export {E};
diff --git a/tests/cases/compiler/es6modulekindWithES5Target11.ts b/tests/cases/compiler/es6modulekindWithES5Target11.ts
new file mode 100644
index 00000000000..af4329200e6
--- /dev/null
+++ b/tests/cases/compiler/es6modulekindWithES5Target11.ts
@@ -0,0 +1,12 @@
+// @target: es5
+// @module: es2015
+// @experimentalDecorators: true
+
+declare function foo(...args: any[]): any;
+@foo
+export default class C {
+    static x() { return C.y; }
+    static y = 1
+    p = 1;
+    method() { }
+}
\ No newline at end of file
diff --git a/tests/cases/compiler/es6modulekindWithES5Target9.ts b/tests/cases/compiler/es6modulekindWithES5Target9.ts
index e0f7b612c08..6e6fff124dd 100644
--- a/tests/cases/compiler/es6modulekindWithES5Target9.ts
+++ b/tests/cases/compiler/es6modulekindWithES5Target9.ts
@@ -9,6 +9,10 @@ import * as M from "mod";
 
 export {a};
 
+export {M};
+
+export {d};
+
 export * from "mod";
 
 export {b} from "mod"

From 4383f1a15f43a99286a2bdf0b35cde83e7bb3e1e Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Thu, 9 Jun 2016 16:28:42 -0700
Subject: [PATCH 243/332] Refactoring

---
 src/compiler/commandLineParser.ts    |  2 +-
 src/compiler/diagnosticMessages.json |  4 ---
 src/compiler/program.ts              | 38 ++--------------------------
 src/server/editorServices.ts         | 26 ++++++++++++++++---
 src/server/protocol.d.ts             |  3 +++
 5 files changed, 28 insertions(+), 45 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index f8ab0330dad..ccde539fafa 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -408,7 +408,7 @@ namespace ts {
             description: Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
         },
         {
-            name: "disableSizeLimit",
+            name: "disableProjectSizeLimit",
             type: "boolean"
         },
         {
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 47fa84dd9ce..44062885677 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -2984,9 +2984,5 @@
     "Unknown typing option '{0}'.": {
         "category": "Error",
         "code": 17010
-    },
-    "Too many JavaScript files in the project. Consider specifying the 'exclude' setting in project configuration to limit included source folders. The likely folder to exclude is '{0}'. To disable the project size limit, set the 'disableSizeLimit' compiler option to 'true'.": {
-        "category": "Error",
-        "code": 17012
     }
 }
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 99ca9377d54..06f32c4f4a2 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -7,9 +7,6 @@ namespace ts {
     /* @internal */ export let emitTime = 0;
     /* @internal */ export let ioReadTime = 0;
     /* @internal */ export let ioWriteTime = 0;
-    /* @internal */ export const maxProgramSizeForNonTsFiles = 20 * 1024 * 1024;
-
-    /** The version of the TypeScript compiler release */
 
     const emptyArray: any[] = [];
 
@@ -19,6 +16,7 @@ namespace ts {
         "node_modules/@types/",
     ];
 
+    /** The version of the TypeScript compiler release */
     export const version = "1.9.0";
 
     export function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean): string {
@@ -1059,8 +1057,6 @@ namespace ts {
         let diagnosticsProducingTypeChecker: TypeChecker;
         let noDiagnosticsTypeChecker: TypeChecker;
         let classifiableNames: Map<string>;
-        let programSizeLimitExceeded = false;
-        let programSizeForNonTsFiles = 0;
 
         let resolvedTypeReferenceDirectives: Map<ResolvedTypeReferenceDirective> = {};
         let fileProcessingDiagnostics = createDiagnosticCollection();
@@ -1166,11 +1162,6 @@ namespace ts {
 
         return program;
 
-        function exceedProgramSizeLimit() {
-            return !options.disableSizeLimit && programSizeLimitExceeded;
-        }
-
-
         function getCommonSourceDirectory() {
             if (typeof commonSourceDirectory === "undefined") {
                 if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
@@ -1219,7 +1210,6 @@ namespace ts {
                 (oldOptions.noLib !== options.noLib) ||
                 (oldOptions.jsx !== options.jsx) ||
                 (oldOptions.allowJs !== options.allowJs) ||
-                (oldOptions.disableSizeLimit !== options.disableSizeLimit) ||
                 (oldOptions.rootDir !== options.rootDir) ||
                 (oldOptions.typesSearchPaths !== options.typesSearchPaths) ||
                 (oldOptions.configFilePath !== options.configFilePath) ||
@@ -1838,7 +1828,7 @@ namespace ts {
                 }
             }
 
-            if (diagnostic && !exceedProgramSizeLimit()) {
+            if (diagnostic) {
                 if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
                     fileProcessingDiagnostics.add(createFileDiagnostic(refFile, refPos, refEnd - refPos, diagnostic, ...diagnosticArgument));
                 }
@@ -1871,11 +1861,6 @@ namespace ts {
                 return file;
             }
 
-            const isNonTsFile = !hasTypeScriptFileExtension(fileName);
-            if (isNonTsFile && exceedProgramSizeLimit()) {
-                return undefined;
-            }
-
             // We haven't looked for this file, do so now and cache result
             const file = host.getSourceFile(fileName, options.target, hostErrorMessage => {
                 if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
@@ -1887,25 +1872,6 @@ namespace ts {
                 }
             });
 
-            if (!options.disableSizeLimit && file && file.text && !hasTypeScriptFileExtension(file.fileName)) {
-                programSizeForNonTsFiles += file.text.length;
-                if (programSizeForNonTsFiles > maxProgramSizeForNonTsFiles) {
-                    // If the program size limit was reached when processing a file, this file is
-                    // likely in the problematic folder than contains too many files.
-                    // Normally the folder is one level down from the commonSourceDirectory, for example,
-                    // if the commonSourceDirectory is "/src/", and the last processed path was "/src/node_modules/a/b.js",
-                    // we should show in the error message "/src/node_modules/".
-                    const commonSourceDirectory = getCommonSourceDirectory();
-                    let rootLevelDirectory = path.substring(0, Math.max(commonSourceDirectory.length, path.indexOf(directorySeparator, commonSourceDirectory.length)));
-                    if (rootLevelDirectory[rootLevelDirectory.length - 1] !== directorySeparator) {
-                        rootLevelDirectory += directorySeparator;
-                    }
-                    programDiagnostics.add(createCompilerDiagnostic(Diagnostics.Too_many_JavaScript_files_in_the_project_Consider_specifying_the_exclude_setting_in_project_configuration_to_limit_included_source_folders_The_likely_folder_to_exclude_is_0_To_disable_the_project_size_limit_set_the_disableSizeLimit_compiler_option_to_true, rootLevelDirectory));
-                    programSizeLimitExceeded = true;
-                    return undefined;
-                }
-            }
-
             filesByName.set(path, file);
             if (file) {
                 file.path = path;
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index bd29dc65ac4..5af2989a717 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -27,6 +27,8 @@ namespace ts.server {
         });
     }
 
+    export const maxProgramSizeForNonTsFiles = 20 * 1024 * 1024;
+
     export class ScriptInfo {
         svc: ScriptVersionCache;
         children: ScriptInfo[] = [];     // files referenced by this file
@@ -384,7 +386,7 @@ namespace ts.server {
         constructor(
             public projectService: ProjectService,
             public projectOptions?: ProjectOptions,
-            public languageServiceDiabled?: boolean) {
+            public languageServiceDiabled = false) {
             if (projectOptions && projectOptions.files) {
                 // If files are listed explicitly, allow all extensions
                 projectOptions.compilerOptions.allowNonTsExtensions = true;
@@ -430,7 +432,16 @@ namespace ts.server {
 
         getFileNames() {
             if (this.languageServiceDiabled) {
-                return this.projectOptions ? this.projectOptions.files : undefined;
+                if (!this.projectOptions) {
+                    return undefined;
+                }
+
+                const fileNames: string[] = [];
+                if (this.projectOptions && this.projectOptions.compilerOptions) {
+                    fileNames.push(getDefaultLibFilePath(this.projectOptions.compilerOptions));
+                }
+                ts.addRange(fileNames, this.projectOptions.files);
+                return fileNames;
             }
 
             const sourceFiles = this.program.getSourceFiles();
@@ -1340,6 +1351,10 @@ namespace ts.server {
 
         private exceedTotalNonTsFileSizeLimit(fileNames: string[]) {
             let totalNonTsFileSize = 0;
+            if (!this.host.getFileSize) {
+                return false;
+            }
+
             for (const fileName of fileNames) {
                 if (hasTypeScriptFileExtension(fileName)) {
                     continue;
@@ -1409,14 +1424,17 @@ namespace ts.server {
                     return errors;
                 }
                 else {
-                    if (this.exceedTotalNonTsFileSizeLimit(projectOptions.files)) {
+                    if (this.exceedTotalNonTsFileSizeLimit(projectOptions.files) && projectOptions.compilerOptions && !projectOptions.compilerOptions.disableSizeLimit) {
                         project.setProjectOptions(projectOptions);
                         if (project.languageServiceDiabled) {
                             return;
                         }
 
                         project.disableLanguageService();
-                        project.directoryWatcher.close();
+                        if (project.directoryWatcher) {
+                            project.directoryWatcher.close();
+                            project.directoryWatcher = undefined;
+                        }
                         return;
                     }
 
diff --git a/src/server/protocol.d.ts b/src/server/protocol.d.ts
index 018162d0fff..4ebf1aff5d6 100644
--- a/src/server/protocol.d.ts
+++ b/src/server/protocol.d.ts
@@ -123,6 +123,9 @@ declare namespace ts.server.protocol {
           * The list of normalized file name in the project, including 'lib.d.ts'
           */
         fileNames?: string[];
+        /**
+         * Indicates if the project has a active language service instance
+         */
         languageServiceDisabled?: boolean;
     }
 

From 6923cba29a132c01afc3af476e8ba221f7ee7a8d Mon Sep 17 00:00:00 2001
From: Jonathan Toland <toland@dnalot.com>
Date: Thu, 9 Jun 2016 17:39:47 -1000
Subject: [PATCH 244/332] Update more diagnostic messages ES6->2015

Fix #8996 CC @mhegazy.
---
 lib/tsc.js                                       | 16 ++++++++--------
 lib/tsserver.js                                  | 16 ++++++++--------
 lib/tsserverlibrary.d.ts                         |  8 ++++----
 lib/tsserverlibrary.js                           | 16 ++++++++--------
 lib/typescript.js                                | 16 ++++++++--------
 lib/typescriptServices.js                        | 16 ++++++++--------
 src/compiler/checker.ts                          |  8 ++++----
 src/compiler/diagnosticMessages.json             |  8 ++++----
 .../FunctionDeclaration11_es6.errors.txt         |  4 ++--
 .../FunctionDeclaration13_es6.errors.txt         |  4 ++--
 .../FunctionDeclaration1_es6.errors.txt          |  4 ++--
 .../FunctionDeclaration6_es6.errors.txt          |  4 ++--
 .../FunctionDeclaration7_es6.errors.txt          |  8 ++++----
 .../FunctionDeclaration9_es6.errors.txt          |  4 ++--
 .../reference/FunctionExpression1_es6.errors.txt |  4 ++--
 .../reference/FunctionExpression2_es6.errors.txt |  4 ++--
 .../FunctionPropertyAssignments1_es6.errors.txt  |  4 ++--
 .../FunctionPropertyAssignments5_es6.errors.txt  |  4 ++--
 .../MemberFunctionDeclaration1_es6.errors.txt    |  4 ++--
 .../MemberFunctionDeclaration2_es6.errors.txt    |  4 ++--
 .../MemberFunctionDeclaration3_es6.errors.txt    |  4 ++--
 .../MemberFunctionDeclaration7_es6.errors.txt    |  4 ++--
 .../reference/YieldExpression10_es6.errors.txt   |  4 ++--
 .../reference/YieldExpression11_es6.errors.txt   |  4 ++--
 .../reference/YieldExpression13_es6.errors.txt   |  4 ++--
 .../reference/YieldExpression16_es6.errors.txt   |  4 ++--
 .../reference/YieldExpression19_es6.errors.txt   |  8 ++++----
 .../reference/YieldExpression3_es6.errors.txt    |  4 ++--
 .../reference/YieldExpression4_es6.errors.txt    |  4 ++--
 .../reference/YieldExpression6_es6.errors.txt    |  4 ++--
 .../reference/YieldExpression7_es6.errors.txt    |  4 ++--
 .../reference/YieldExpression8_es6.errors.txt    |  4 ++--
 .../reference/YieldExpression9_es6.errors.txt    |  4 ++--
 .../YieldStarExpression4_es6.errors.txt          |  4 ++--
 .../disallowAsyncModifierInES5.errors.txt        | 12 ++++++------
 .../reference/es6ExportAssignment.errors.txt     |  4 ++--
 .../reference/es6ExportAssignment2.errors.txt    |  4 ++--
 .../reference/es6ExportEquals.errors.txt         |  4 ++--
 .../es6ImportEqualsDeclaration.errors.txt        |  8 ++++----
 .../templateStringInYieldKeyword.errors.txt      |  4 ++--
 .../reference/yieldExpression1.errors.txt        |  4 ++--
 41 files changed, 128 insertions(+), 128 deletions(-)

diff --git a/lib/tsc.js b/lib/tsc.js
index ca303c49f7b..93e250202d2 100644
--- a/lib/tsc.js
+++ b/lib/tsc.js
@@ -1445,8 +1445,8 @@ var ts;
         An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
         Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
         Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead." },
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
         Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
         Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
         Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
@@ -1460,7 +1460,7 @@ var ts;
         Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
         Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
         Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
-        Generators_are_only_available_when_targeting_ECMAScript_6_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_6_or_higher_1220", message: "Generators are only available when targeting ECMAScript 6 or higher." },
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
         Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
         An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
         _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
@@ -1495,7 +1495,7 @@ var ts;
         Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
         with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
         await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
-        Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher_1311", message: "Async functions are only available when targeting ECMAScript 6 and higher." },
+        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
         can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
         The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
         Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
@@ -24586,7 +24586,7 @@ var ts;
                 }
                 else {
                     if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
-                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
+                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
                     }
                 }
             }
@@ -24653,7 +24653,7 @@ var ts;
             checkExternalModuleExports(container);
             if (node.isExportEquals && !ts.isInAmbientContext(node)) {
                 if (modulekind === ts.ModuleKind.ES6) {
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_or_another_module_format_instead);
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
                 }
                 else if (modulekind === ts.ModuleKind.System) {
                     grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
@@ -25997,7 +25997,7 @@ var ts;
         }
         function checkGrammarAsyncModifier(node, asyncModifier) {
             if (languageVersion < 2) {
-                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher);
+                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
             }
             switch (node.kind) {
                 case 147:
@@ -26221,7 +26221,7 @@ var ts;
                     return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
                 }
                 if (languageVersion < 2) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_6_or_higher);
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
                 }
             }
         }
diff --git a/lib/tsserver.js b/lib/tsserver.js
index dcf76693225..ff03ffc0b2c 100644
--- a/lib/tsserver.js
+++ b/lib/tsserver.js
@@ -1450,8 +1450,8 @@ var ts;
         An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
         Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
         Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead." },
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
         Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
         Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
         Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
@@ -1465,7 +1465,7 @@ var ts;
         Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
         Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
         Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
-        Generators_are_only_available_when_targeting_ECMAScript_6_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_6_or_higher_1220", message: "Generators are only available when targeting ECMAScript 6 or higher." },
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
         Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
         An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
         _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
@@ -1500,7 +1500,7 @@ var ts;
         Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
         with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
         await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
-        Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher_1311", message: "Async functions are only available when targeting ECMAScript 6 and higher." },
+        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
         can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
         The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
         Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
@@ -25350,7 +25350,7 @@ var ts;
                 }
                 else {
                     if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
-                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
+                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
                     }
                 }
             }
@@ -25417,7 +25417,7 @@ var ts;
             checkExternalModuleExports(container);
             if (node.isExportEquals && !ts.isInAmbientContext(node)) {
                 if (modulekind === ts.ModuleKind.ES6) {
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_or_another_module_format_instead);
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
                 }
                 else if (modulekind === ts.ModuleKind.System) {
                     grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
@@ -26761,7 +26761,7 @@ var ts;
         }
         function checkGrammarAsyncModifier(node, asyncModifier) {
             if (languageVersion < 2) {
-                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher);
+                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
             }
             switch (node.kind) {
                 case 147:
@@ -26985,7 +26985,7 @@ var ts;
                     return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
                 }
                 if (languageVersion < 2) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_6_or_higher);
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
                 }
             }
         }
diff --git a/lib/tsserverlibrary.d.ts b/lib/tsserverlibrary.d.ts
index 76b66dda93b..2f97dac5c91 100644
--- a/lib/tsserverlibrary.d.ts
+++ b/lib/tsserverlibrary.d.ts
@@ -3099,13 +3099,13 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: {
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: {
             code: number;
             category: DiagnosticCategory;
             key: string;
             message: string;
         };
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_or_another_module_format_instead: {
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -3189,7 +3189,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Generators_are_only_available_when_targeting_ECMAScript_6_or_higher: {
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: {
             code: number;
             category: DiagnosticCategory;
             key: string;
@@ -3399,7 +3399,7 @@ declare namespace ts {
             key: string;
             message: string;
         };
-        Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher: {
+        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: {
             code: number;
             category: DiagnosticCategory;
             key: string;
diff --git a/lib/tsserverlibrary.js b/lib/tsserverlibrary.js
index f16d02e472c..8bab90c0790 100644
--- a/lib/tsserverlibrary.js
+++ b/lib/tsserverlibrary.js
@@ -1450,8 +1450,8 @@ var ts;
         An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
         Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
         Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead." },
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
         Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
         Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
         Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
@@ -1465,7 +1465,7 @@ var ts;
         Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
         Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
         Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
-        Generators_are_only_available_when_targeting_ECMAScript_6_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_6_or_higher_1220", message: "Generators are only available when targeting ECMAScript 6 or higher." },
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
         Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
         An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
         _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
@@ -1500,7 +1500,7 @@ var ts;
         Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
         with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
         await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
-        Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher_1311", message: "Async functions are only available when targeting ECMAScript 6 and higher." },
+        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
         can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
         The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
         Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
@@ -25350,7 +25350,7 @@ var ts;
                 }
                 else {
                     if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
-                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
+                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
                     }
                 }
             }
@@ -25417,7 +25417,7 @@ var ts;
             checkExternalModuleExports(container);
             if (node.isExportEquals && !ts.isInAmbientContext(node)) {
                 if (modulekind === ts.ModuleKind.ES6) {
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_or_another_module_format_instead);
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
                 }
                 else if (modulekind === ts.ModuleKind.System) {
                     grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
@@ -26761,7 +26761,7 @@ var ts;
         }
         function checkGrammarAsyncModifier(node, asyncModifier) {
             if (languageVersion < 2) {
-                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher);
+                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
             }
             switch (node.kind) {
                 case 147:
@@ -26985,7 +26985,7 @@ var ts;
                     return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
                 }
                 if (languageVersion < 2) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_6_or_higher);
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
                 }
             }
         }
diff --git a/lib/typescript.js b/lib/typescript.js
index cf982a3ede9..df838f8f743 100644
--- a/lib/typescript.js
+++ b/lib/typescript.js
@@ -2403,8 +2403,8 @@ var ts;
         An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
         Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
         Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead." },
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
         Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
         Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
         Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
@@ -2418,7 +2418,7 @@ var ts;
         Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
         Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
         Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
-        Generators_are_only_available_when_targeting_ECMAScript_6_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_6_or_higher_1220", message: "Generators are only available when targeting ECMAScript 6 or higher." },
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
         Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
         An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
         _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
@@ -2453,7 +2453,7 @@ var ts;
         Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
         with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
         await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
-        Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher_1311", message: "Async functions are only available when targeting ECMAScript 6 and higher." },
+        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
         can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
         The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
         Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
@@ -30074,7 +30074,7 @@ var ts;
                 else {
                     if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
                         // Import equals declaration is deprecated in es6 or above
-                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
+                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
                     }
                 }
             }
@@ -30150,7 +30150,7 @@ var ts;
             if (node.isExportEquals && !ts.isInAmbientContext(node)) {
                 if (modulekind === ts.ModuleKind.ES6) {
                     // export assignment is not supported in es6 modules
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_or_another_module_format_instead);
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
                 }
                 else if (modulekind === ts.ModuleKind.System) {
                     // system modules does not support export assignment
@@ -31670,7 +31670,7 @@ var ts;
         }
         function checkGrammarAsyncModifier(node, asyncModifier) {
             if (languageVersion < 2 /* ES6 */) {
-                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher);
+                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
             }
             switch (node.kind) {
                 case 147 /* MethodDeclaration */:
@@ -31899,7 +31899,7 @@ var ts;
                     return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
                 }
                 if (languageVersion < 2 /* ES6 */) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_6_or_higher);
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
                 }
             }
         }
diff --git a/lib/typescriptServices.js b/lib/typescriptServices.js
index cf982a3ede9..df838f8f743 100644
--- a/lib/typescriptServices.js
+++ b/lib/typescriptServices.js
@@ -2403,8 +2403,8 @@ var ts;
         An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
         Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
         Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead." },
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
         Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
         Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
         Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
@@ -2418,7 +2418,7 @@ var ts;
         Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
         Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
         Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
-        Generators_are_only_available_when_targeting_ECMAScript_6_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_6_or_higher_1220", message: "Generators are only available when targeting ECMAScript 6 or higher." },
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
         Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
         An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
         _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
@@ -2453,7 +2453,7 @@ var ts;
         Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
         with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
         await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
-        Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher_1311", message: "Async functions are only available when targeting ECMAScript 6 and higher." },
+        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
         can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
         The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
         Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
@@ -30074,7 +30074,7 @@ var ts;
                 else {
                     if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
                         // Import equals declaration is deprecated in es6 or above
-                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
+                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
                     }
                 }
             }
@@ -30150,7 +30150,7 @@ var ts;
             if (node.isExportEquals && !ts.isInAmbientContext(node)) {
                 if (modulekind === ts.ModuleKind.ES6) {
                     // export assignment is not supported in es6 modules
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_or_another_module_format_instead);
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
                 }
                 else if (modulekind === ts.ModuleKind.System) {
                     // system modules does not support export assignment
@@ -31670,7 +31670,7 @@ var ts;
         }
         function checkGrammarAsyncModifier(node, asyncModifier) {
             if (languageVersion < 2 /* ES6 */) {
-                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher);
+                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
             }
             switch (node.kind) {
                 case 147 /* MethodDeclaration */:
@@ -31899,7 +31899,7 @@ var ts;
                     return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
                 }
                 if (languageVersion < 2 /* ES6 */) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_6_or_higher);
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
                 }
             }
         }
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index fc1c2c0a873..044f42414b7 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -16264,7 +16264,7 @@ namespace ts {
                 else {
                     if (modulekind === ModuleKind.ES6 && !isInAmbientContext(node)) {
                         // Import equals declaration is deprecated in es6 or above
-                        grammarErrorOnNode(node, Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
+                        grammarErrorOnNode(node, Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
                     }
                 }
             }
@@ -16350,7 +16350,7 @@ namespace ts {
             if (node.isExportEquals && !isInAmbientContext(node)) {
                 if (modulekind === ModuleKind.ES6) {
                     // export assignment is not supported in es6 modules
-                    grammarErrorOnNode(node, Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_6_modules_Consider_using_export_default_or_another_module_format_instead);
+                    grammarErrorOnNode(node, Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
                 }
                 else if (modulekind === ModuleKind.System) {
                     // system modules does not support export assignment
@@ -18030,7 +18030,7 @@ namespace ts {
 
         function checkGrammarAsyncModifier(node: Node, asyncModifier: Node): boolean {
             if (languageVersion < ScriptTarget.ES6) {
-                return grammarErrorOnNode(asyncModifier, Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_6_and_higher);
+                return grammarErrorOnNode(asyncModifier, Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
             }
 
             switch (node.kind) {
@@ -18288,7 +18288,7 @@ namespace ts {
                     return grammarErrorOnNode(node.asteriskToken, Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
                 }
                 if (languageVersion < ScriptTarget.ES6) {
-                    return grammarErrorOnNode(node.asteriskToken, Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_6_or_higher);
+                    return grammarErrorOnNode(node.asteriskToken, Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
                 }
             }
         }
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index c27612764d1..4a16000a1d2 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -627,11 +627,11 @@
         "category": "Error",
         "code": 1200
     },
-    "Import assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead.": {
+    "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead.": {
         "category": "Error",
         "code": 1202
     },
-    "Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead.": {
+    "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead.": {
         "category": "Error",
         "code": 1203
     },
@@ -687,7 +687,7 @@
         "category": "Error",
         "code": 1219
     },
-    "Generators are only available when targeting ECMAScript 6 or higher.": {
+    "Generators are only available when targeting ECMAScript 2015 or higher.": {
         "category": "Error",
         "code": 1220
     },
@@ -831,7 +831,7 @@
         "category": "Error",
         "code": 1308
     },
-    "Async functions are only available when targeting ECMAScript 6 and higher.": {
+    "Async functions are only available when targeting ECMAScript 2015 or higher.": {
         "category": "Error",
         "code": 1311
     },
diff --git a/tests/baselines/reference/FunctionDeclaration11_es6.errors.txt b/tests/baselines/reference/FunctionDeclaration11_es6.errors.txt
index e24f702213c..4db3842e91d 100644
--- a/tests/baselines/reference/FunctionDeclaration11_es6.errors.txt
+++ b/tests/baselines/reference/FunctionDeclaration11_es6.errors.txt
@@ -1,8 +1,8 @@
-tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration11_es6.ts(1,10): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration11_es6.ts(1,10): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration11_es6.ts (1 errors) ====
     function * yield() {
              ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/FunctionDeclaration13_es6.errors.txt b/tests/baselines/reference/FunctionDeclaration13_es6.errors.txt
index 2b090f4a733..fa675446617 100644
--- a/tests/baselines/reference/FunctionDeclaration13_es6.errors.txt
+++ b/tests/baselines/reference/FunctionDeclaration13_es6.errors.txt
@@ -1,11 +1,11 @@
-tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration13_es6.ts(1,10): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration13_es6.ts(1,10): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration13_es6.ts(3,11): error TS2304: Cannot find name 'yield'.
 
 
 ==== tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration13_es6.ts (2 errors) ====
     function * foo() {
              ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
        // Legal to use 'yield' in a type context.
        var v: yield;
               ~~~~~
diff --git a/tests/baselines/reference/FunctionDeclaration1_es6.errors.txt b/tests/baselines/reference/FunctionDeclaration1_es6.errors.txt
index 52bdfbd1afe..d3dab521926 100644
--- a/tests/baselines/reference/FunctionDeclaration1_es6.errors.txt
+++ b/tests/baselines/reference/FunctionDeclaration1_es6.errors.txt
@@ -1,8 +1,8 @@
-tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration1_es6.ts(1,10): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration1_es6.ts(1,10): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration1_es6.ts (1 errors) ====
     function * foo() {
              ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/FunctionDeclaration6_es6.errors.txt b/tests/baselines/reference/FunctionDeclaration6_es6.errors.txt
index eae7628f046..60798f7dbd6 100644
--- a/tests/baselines/reference/FunctionDeclaration6_es6.errors.txt
+++ b/tests/baselines/reference/FunctionDeclaration6_es6.errors.txt
@@ -1,11 +1,11 @@
-tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration6_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration6_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration6_es6.ts(1,18): error TS2523: 'yield' expressions cannot be used in a parameter initializer.
 
 
 ==== tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration6_es6.ts (2 errors) ====
     function*foo(a = yield) {
             ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
                      ~~~~~
 !!! error TS2523: 'yield' expressions cannot be used in a parameter initializer.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/FunctionDeclaration7_es6.errors.txt b/tests/baselines/reference/FunctionDeclaration7_es6.errors.txt
index 4a9e4bca6d3..3c1b950bea5 100644
--- a/tests/baselines/reference/FunctionDeclaration7_es6.errors.txt
+++ b/tests/baselines/reference/FunctionDeclaration7_es6.errors.txt
@@ -1,16 +1,16 @@
-tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration7_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
-tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration7_es6.ts(3,11): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration7_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
+tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration7_es6.ts(3,11): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration7_es6.ts(3,20): error TS2523: 'yield' expressions cannot be used in a parameter initializer.
 
 
 ==== tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration7_es6.ts (3 errors) ====
     function*bar() {
             ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
       // 'yield' here is an identifier, and not a yield expression.
       function*foo(a = yield) {
               ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
                        ~~~~~
 !!! error TS2523: 'yield' expressions cannot be used in a parameter initializer.
       }
diff --git a/tests/baselines/reference/FunctionDeclaration9_es6.errors.txt b/tests/baselines/reference/FunctionDeclaration9_es6.errors.txt
index e4222409a66..a2d2121d7fa 100644
--- a/tests/baselines/reference/FunctionDeclaration9_es6.errors.txt
+++ b/tests/baselines/reference/FunctionDeclaration9_es6.errors.txt
@@ -1,9 +1,9 @@
-tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration9_es6.ts(1,10): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration9_es6.ts(1,10): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/functionDeclarations/FunctionDeclaration9_es6.ts (1 errors) ====
     function * foo() {
              ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
       var v = { [yield]: foo }
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/FunctionExpression1_es6.errors.txt b/tests/baselines/reference/FunctionExpression1_es6.errors.txt
index cb2ebd7245e..9c1f798c5ad 100644
--- a/tests/baselines/reference/FunctionExpression1_es6.errors.txt
+++ b/tests/baselines/reference/FunctionExpression1_es6.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/conformance/es6/functionExpressions/FunctionExpression1_es6.ts(1,18): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/functionExpressions/FunctionExpression1_es6.ts(1,18): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/functionExpressions/FunctionExpression1_es6.ts (1 errors) ====
     var v = function * () { }
                      ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
\ No newline at end of file
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
\ No newline at end of file
diff --git a/tests/baselines/reference/FunctionExpression2_es6.errors.txt b/tests/baselines/reference/FunctionExpression2_es6.errors.txt
index d5350b5fdec..9248962e620 100644
--- a/tests/baselines/reference/FunctionExpression2_es6.errors.txt
+++ b/tests/baselines/reference/FunctionExpression2_es6.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/conformance/es6/functionExpressions/FunctionExpression2_es6.ts(1,18): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/functionExpressions/FunctionExpression2_es6.ts(1,18): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/functionExpressions/FunctionExpression2_es6.ts (1 errors) ====
     var v = function * foo() { }
                      ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
\ No newline at end of file
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
\ No newline at end of file
diff --git a/tests/baselines/reference/FunctionPropertyAssignments1_es6.errors.txt b/tests/baselines/reference/FunctionPropertyAssignments1_es6.errors.txt
index a2aa32a9dd1..fd463eed02d 100644
--- a/tests/baselines/reference/FunctionPropertyAssignments1_es6.errors.txt
+++ b/tests/baselines/reference/FunctionPropertyAssignments1_es6.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/conformance/es6/functionPropertyAssignments/FunctionPropertyAssignments1_es6.ts(1,11): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/functionPropertyAssignments/FunctionPropertyAssignments1_es6.ts(1,11): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/functionPropertyAssignments/FunctionPropertyAssignments1_es6.ts (1 errors) ====
     var v = { *foo() { } }
               ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
\ No newline at end of file
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
\ No newline at end of file
diff --git a/tests/baselines/reference/FunctionPropertyAssignments5_es6.errors.txt b/tests/baselines/reference/FunctionPropertyAssignments5_es6.errors.txt
index 8490be5cdc4..35185fdb7c6 100644
--- a/tests/baselines/reference/FunctionPropertyAssignments5_es6.errors.txt
+++ b/tests/baselines/reference/FunctionPropertyAssignments5_es6.errors.txt
@@ -1,10 +1,10 @@
-tests/cases/conformance/es6/functionPropertyAssignments/FunctionPropertyAssignments5_es6.ts(1,11): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/functionPropertyAssignments/FunctionPropertyAssignments5_es6.ts(1,11): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 tests/cases/conformance/es6/functionPropertyAssignments/FunctionPropertyAssignments5_es6.ts(1,13): error TS2304: Cannot find name 'foo'.
 
 
 ==== tests/cases/conformance/es6/functionPropertyAssignments/FunctionPropertyAssignments5_es6.ts (2 errors) ====
     var v = { *[foo()]() { } }
               ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
                 ~~~
 !!! error TS2304: Cannot find name 'foo'.
\ No newline at end of file
diff --git a/tests/baselines/reference/MemberFunctionDeclaration1_es6.errors.txt b/tests/baselines/reference/MemberFunctionDeclaration1_es6.errors.txt
index 7766ad8d790..25cb4ba4240 100644
--- a/tests/baselines/reference/MemberFunctionDeclaration1_es6.errors.txt
+++ b/tests/baselines/reference/MemberFunctionDeclaration1_es6.errors.txt
@@ -1,9 +1,9 @@
-tests/cases/conformance/es6/memberFunctionDeclarations/MemberFunctionDeclaration1_es6.ts(2,4): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/memberFunctionDeclarations/MemberFunctionDeclaration1_es6.ts(2,4): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/memberFunctionDeclarations/MemberFunctionDeclaration1_es6.ts (1 errors) ====
     class C {
        *foo() { }
        ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/MemberFunctionDeclaration2_es6.errors.txt b/tests/baselines/reference/MemberFunctionDeclaration2_es6.errors.txt
index 38a761f6db7..8277d6f1f67 100644
--- a/tests/baselines/reference/MemberFunctionDeclaration2_es6.errors.txt
+++ b/tests/baselines/reference/MemberFunctionDeclaration2_es6.errors.txt
@@ -1,9 +1,9 @@
-tests/cases/conformance/es6/memberFunctionDeclarations/MemberFunctionDeclaration2_es6.ts(2,11): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/memberFunctionDeclarations/MemberFunctionDeclaration2_es6.ts(2,11): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/memberFunctionDeclarations/MemberFunctionDeclaration2_es6.ts (1 errors) ====
     class C {
        public * foo() { }
               ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/MemberFunctionDeclaration3_es6.errors.txt b/tests/baselines/reference/MemberFunctionDeclaration3_es6.errors.txt
index e561954035e..3fd821bafdf 100644
--- a/tests/baselines/reference/MemberFunctionDeclaration3_es6.errors.txt
+++ b/tests/baselines/reference/MemberFunctionDeclaration3_es6.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/es6/memberFunctionDeclarations/MemberFunctionDeclaration3_es6.ts(2,4): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/memberFunctionDeclarations/MemberFunctionDeclaration3_es6.ts(2,4): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 tests/cases/conformance/es6/memberFunctionDeclarations/MemberFunctionDeclaration3_es6.ts(2,6): error TS2304: Cannot find name 'foo'.
 
 
@@ -6,7 +6,7 @@ tests/cases/conformance/es6/memberFunctionDeclarations/MemberFunctionDeclaration
     class C {
        *[foo]() { }
        ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
          ~~~
 !!! error TS2304: Cannot find name 'foo'.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/MemberFunctionDeclaration7_es6.errors.txt b/tests/baselines/reference/MemberFunctionDeclaration7_es6.errors.txt
index 3eb8f5051a0..cd4c49bdd6d 100644
--- a/tests/baselines/reference/MemberFunctionDeclaration7_es6.errors.txt
+++ b/tests/baselines/reference/MemberFunctionDeclaration7_es6.errors.txt
@@ -1,9 +1,9 @@
-tests/cases/conformance/es6/memberFunctionDeclarations/MemberFunctionDeclaration7_es6.ts(2,4): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/memberFunctionDeclarations/MemberFunctionDeclaration7_es6.ts(2,4): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/memberFunctionDeclarations/MemberFunctionDeclaration7_es6.ts (1 errors) ====
     class C {
        *foo<T>() { }
        ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/YieldExpression10_es6.errors.txt b/tests/baselines/reference/YieldExpression10_es6.errors.txt
index 99a73c48ba5..7bf534e4188 100644
--- a/tests/baselines/reference/YieldExpression10_es6.errors.txt
+++ b/tests/baselines/reference/YieldExpression10_es6.errors.txt
@@ -1,11 +1,11 @@
-tests/cases/conformance/es6/yieldExpressions/YieldExpression10_es6.ts(1,11): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/yieldExpressions/YieldExpression10_es6.ts(1,11): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 tests/cases/conformance/es6/yieldExpressions/YieldExpression10_es6.ts(2,11): error TS2304: Cannot find name 'foo'.
 
 
 ==== tests/cases/conformance/es6/yieldExpressions/YieldExpression10_es6.ts (2 errors) ====
     var v = { * foo() {
               ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
         yield(foo);
               ~~~
 !!! error TS2304: Cannot find name 'foo'.
diff --git a/tests/baselines/reference/YieldExpression11_es6.errors.txt b/tests/baselines/reference/YieldExpression11_es6.errors.txt
index 1b0c08bd79a..f5d3458520f 100644
--- a/tests/baselines/reference/YieldExpression11_es6.errors.txt
+++ b/tests/baselines/reference/YieldExpression11_es6.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/es6/yieldExpressions/YieldExpression11_es6.ts(2,3): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/yieldExpressions/YieldExpression11_es6.ts(2,3): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 tests/cases/conformance/es6/yieldExpressions/YieldExpression11_es6.ts(3,11): error TS2663: Cannot find name 'foo'. Did you mean the instance member 'this.foo'?
 
 
@@ -6,7 +6,7 @@ tests/cases/conformance/es6/yieldExpressions/YieldExpression11_es6.ts(3,11): err
     class C {
       *foo() {
       ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
         yield(foo);
               ~~~
 !!! error TS2663: Cannot find name 'foo'. Did you mean the instance member 'this.foo'?
diff --git a/tests/baselines/reference/YieldExpression13_es6.errors.txt b/tests/baselines/reference/YieldExpression13_es6.errors.txt
index 3166d742ae3..99088448886 100644
--- a/tests/baselines/reference/YieldExpression13_es6.errors.txt
+++ b/tests/baselines/reference/YieldExpression13_es6.errors.txt
@@ -1,7 +1,7 @@
-tests/cases/conformance/es6/yieldExpressions/YieldExpression13_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/yieldExpressions/YieldExpression13_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/yieldExpressions/YieldExpression13_es6.ts (1 errors) ====
     function* foo() { yield }
             ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
\ No newline at end of file
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
\ No newline at end of file
diff --git a/tests/baselines/reference/YieldExpression16_es6.errors.txt b/tests/baselines/reference/YieldExpression16_es6.errors.txt
index e792bc59240..0645f5d818a 100644
--- a/tests/baselines/reference/YieldExpression16_es6.errors.txt
+++ b/tests/baselines/reference/YieldExpression16_es6.errors.txt
@@ -1,11 +1,11 @@
-tests/cases/conformance/es6/yieldExpressions/YieldExpression16_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/yieldExpressions/YieldExpression16_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 tests/cases/conformance/es6/yieldExpressions/YieldExpression16_es6.ts(3,5): error TS1163: A 'yield' expression is only allowed in a generator body.
 
 
 ==== tests/cases/conformance/es6/yieldExpressions/YieldExpression16_es6.ts (2 errors) ====
     function* foo() {
             ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
       function bar() {
         yield foo;
         ~~~~~
diff --git a/tests/baselines/reference/YieldExpression19_es6.errors.txt b/tests/baselines/reference/YieldExpression19_es6.errors.txt
index 02591de78ca..f07cfc1db78 100644
--- a/tests/baselines/reference/YieldExpression19_es6.errors.txt
+++ b/tests/baselines/reference/YieldExpression19_es6.errors.txt
@@ -1,15 +1,15 @@
-tests/cases/conformance/es6/yieldExpressions/YieldExpression19_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
-tests/cases/conformance/es6/yieldExpressions/YieldExpression19_es6.ts(3,13): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/yieldExpressions/YieldExpression19_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
+tests/cases/conformance/es6/yieldExpressions/YieldExpression19_es6.ts(3,13): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/yieldExpressions/YieldExpression19_es6.ts (2 errors) ====
     function*foo() {
             ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
       function bar() {
         function* quux() {
                 ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
           yield(foo);
         }
       }
diff --git a/tests/baselines/reference/YieldExpression3_es6.errors.txt b/tests/baselines/reference/YieldExpression3_es6.errors.txt
index c03a5f1c469..9f07c13184e 100644
--- a/tests/baselines/reference/YieldExpression3_es6.errors.txt
+++ b/tests/baselines/reference/YieldExpression3_es6.errors.txt
@@ -1,10 +1,10 @@
-tests/cases/conformance/es6/yieldExpressions/YieldExpression3_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/yieldExpressions/YieldExpression3_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/yieldExpressions/YieldExpression3_es6.ts (1 errors) ====
     function* foo() {
             ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
       yield
       yield
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/YieldExpression4_es6.errors.txt b/tests/baselines/reference/YieldExpression4_es6.errors.txt
index cea33eabfa4..6c9a5796ee8 100644
--- a/tests/baselines/reference/YieldExpression4_es6.errors.txt
+++ b/tests/baselines/reference/YieldExpression4_es6.errors.txt
@@ -1,10 +1,10 @@
-tests/cases/conformance/es6/yieldExpressions/YieldExpression4_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/yieldExpressions/YieldExpression4_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/yieldExpressions/YieldExpression4_es6.ts (1 errors) ====
     function* foo() {
             ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
       yield;
       yield;
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/YieldExpression6_es6.errors.txt b/tests/baselines/reference/YieldExpression6_es6.errors.txt
index fce6583844f..f2fc90b81b4 100644
--- a/tests/baselines/reference/YieldExpression6_es6.errors.txt
+++ b/tests/baselines/reference/YieldExpression6_es6.errors.txt
@@ -1,11 +1,11 @@
-tests/cases/conformance/es6/yieldExpressions/YieldExpression6_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/yieldExpressions/YieldExpression6_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 tests/cases/conformance/es6/yieldExpressions/YieldExpression6_es6.ts(2,9): error TS2488: Type must have a '[Symbol.iterator]()' method that returns an iterator.
 
 
 ==== tests/cases/conformance/es6/yieldExpressions/YieldExpression6_es6.ts (2 errors) ====
     function* foo() {
             ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
       yield*foo
             ~~~
 !!! error TS2488: Type must have a '[Symbol.iterator]()' method that returns an iterator.
diff --git a/tests/baselines/reference/YieldExpression7_es6.errors.txt b/tests/baselines/reference/YieldExpression7_es6.errors.txt
index 39d085b71f9..f929dff0a2a 100644
--- a/tests/baselines/reference/YieldExpression7_es6.errors.txt
+++ b/tests/baselines/reference/YieldExpression7_es6.errors.txt
@@ -1,9 +1,9 @@
-tests/cases/conformance/es6/yieldExpressions/YieldExpression7_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/yieldExpressions/YieldExpression7_es6.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/yieldExpressions/YieldExpression7_es6.ts (1 errors) ====
     function* foo() {
             ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
       yield foo
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/YieldExpression8_es6.errors.txt b/tests/baselines/reference/YieldExpression8_es6.errors.txt
index b14fa0872a2..aef1fbc122d 100644
--- a/tests/baselines/reference/YieldExpression8_es6.errors.txt
+++ b/tests/baselines/reference/YieldExpression8_es6.errors.txt
@@ -1,5 +1,5 @@
 tests/cases/conformance/es6/yieldExpressions/YieldExpression8_es6.ts(1,1): error TS2304: Cannot find name 'yield'.
-tests/cases/conformance/es6/yieldExpressions/YieldExpression8_es6.ts(2,9): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/yieldExpressions/YieldExpression8_es6.ts(2,9): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/yieldExpressions/YieldExpression8_es6.ts (2 errors) ====
@@ -8,6 +8,6 @@ tests/cases/conformance/es6/yieldExpressions/YieldExpression8_es6.ts(2,9): error
 !!! error TS2304: Cannot find name 'yield'.
     function* foo() {
             ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
       yield(foo);
     }
\ No newline at end of file
diff --git a/tests/baselines/reference/YieldExpression9_es6.errors.txt b/tests/baselines/reference/YieldExpression9_es6.errors.txt
index aceb0383200..2ad925a90a0 100644
--- a/tests/baselines/reference/YieldExpression9_es6.errors.txt
+++ b/tests/baselines/reference/YieldExpression9_es6.errors.txt
@@ -1,11 +1,11 @@
-tests/cases/conformance/es6/yieldExpressions/YieldExpression9_es6.ts(1,17): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/yieldExpressions/YieldExpression9_es6.ts(1,17): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 tests/cases/conformance/es6/yieldExpressions/YieldExpression9_es6.ts(2,9): error TS2304: Cannot find name 'foo'.
 
 
 ==== tests/cases/conformance/es6/yieldExpressions/YieldExpression9_es6.ts (2 errors) ====
     var v = function*() {
                     ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
       yield(foo);
             ~~~
 !!! error TS2304: Cannot find name 'foo'.
diff --git a/tests/baselines/reference/YieldStarExpression4_es6.errors.txt b/tests/baselines/reference/YieldStarExpression4_es6.errors.txt
index 4935df494d5..c58844a9288 100644
--- a/tests/baselines/reference/YieldStarExpression4_es6.errors.txt
+++ b/tests/baselines/reference/YieldStarExpression4_es6.errors.txt
@@ -1,11 +1,11 @@
-tests/cases/conformance/es6/yieldExpressions/YieldStarExpression4_es6.ts(1,10): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/yieldExpressions/YieldStarExpression4_es6.ts(1,10): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 tests/cases/conformance/es6/yieldExpressions/YieldStarExpression4_es6.ts(2,13): error TS2488: Type must have a '[Symbol.iterator]()' method that returns an iterator.
 
 
 ==== tests/cases/conformance/es6/yieldExpressions/YieldStarExpression4_es6.ts (2 errors) ====
     function *g() {
              ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
         yield * [];
                 ~~
 !!! error TS2488: Type must have a '[Symbol.iterator]()' method that returns an iterator.
diff --git a/tests/baselines/reference/disallowAsyncModifierInES5.errors.txt b/tests/baselines/reference/disallowAsyncModifierInES5.errors.txt
index 655416f784c..eb3cc8218d1 100644
--- a/tests/baselines/reference/disallowAsyncModifierInES5.errors.txt
+++ b/tests/baselines/reference/disallowAsyncModifierInES5.errors.txt
@@ -1,9 +1,9 @@
 error TS2318: Cannot find global type 'Promise'.
-tests/cases/compiler/disallowAsyncModifierInES5.ts(2,1): error TS1311: Async functions are only available when targeting ECMAScript 6 and higher.
+tests/cases/compiler/disallowAsyncModifierInES5.ts(2,1): error TS1311: Async functions are only available when targeting ECMAScript 2015 or higher.
 tests/cases/compiler/disallowAsyncModifierInES5.ts(2,16): error TS1057: An async function or method must have a valid awaitable return type.
 tests/cases/compiler/disallowAsyncModifierInES5.ts(3,11): error TS1057: An async function or method must have a valid awaitable return type.
-tests/cases/compiler/disallowAsyncModifierInES5.ts(3,11): error TS1311: Async functions are only available when targeting ECMAScript 6 and higher.
-tests/cases/compiler/disallowAsyncModifierInES5.ts(4,11): error TS1311: Async functions are only available when targeting ECMAScript 6 and higher.
+tests/cases/compiler/disallowAsyncModifierInES5.ts(3,11): error TS1311: Async functions are only available when targeting ECMAScript 2015 or higher.
+tests/cases/compiler/disallowAsyncModifierInES5.ts(4,11): error TS1311: Async functions are only available when targeting ECMAScript 2015 or higher.
 tests/cases/compiler/disallowAsyncModifierInES5.ts(4,11): error TS1057: An async function or method must have a valid awaitable return type.
 
 
@@ -12,16 +12,16 @@ tests/cases/compiler/disallowAsyncModifierInES5.ts(4,11): error TS1057: An async
     
     async function foo() { return 42; } // ERROR: Async functions are only available in ES6+
     ~~~~~
-!!! error TS1311: Async functions are only available when targeting ECMAScript 6 and higher.
+!!! error TS1311: Async functions are only available when targeting ECMAScript 2015 or higher.
                    ~~~
 !!! error TS1057: An async function or method must have a valid awaitable return type.
     let bar = async function () { return 42; } // OK, but should be an error
               ~~~~~
 !!! error TS1057: An async function or method must have a valid awaitable return type.
               ~~~~~
-!!! error TS1311: Async functions are only available when targeting ECMAScript 6 and higher.
+!!! error TS1311: Async functions are only available when targeting ECMAScript 2015 or higher.
     let baz = async () => 42; // OK, but should be an error
               ~~~~~
-!!! error TS1311: Async functions are only available when targeting ECMAScript 6 and higher.
+!!! error TS1311: Async functions are only available when targeting ECMAScript 2015 or higher.
               ~~~~~~~~~~~~~~
 !!! error TS1057: An async function or method must have a valid awaitable return type.
\ No newline at end of file
diff --git a/tests/baselines/reference/es6ExportAssignment.errors.txt b/tests/baselines/reference/es6ExportAssignment.errors.txt
index 970d2e184dc..be5ad734c86 100644
--- a/tests/baselines/reference/es6ExportAssignment.errors.txt
+++ b/tests/baselines/reference/es6ExportAssignment.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/es6ExportAssignment.ts(3,1): error TS1203: Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead.
+tests/cases/compiler/es6ExportAssignment.ts(3,1): error TS1203: Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead.
 
 
 ==== tests/cases/compiler/es6ExportAssignment.ts (1 errors) ====
@@ -6,4 +6,4 @@ tests/cases/compiler/es6ExportAssignment.ts(3,1): error TS1203: Export assignmen
     var a = 10;
     export = a;
     ~~~~~~~~~~~
-!!! error TS1203: Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead.
\ No newline at end of file
+!!! error TS1203: Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead.
\ No newline at end of file
diff --git a/tests/baselines/reference/es6ExportAssignment2.errors.txt b/tests/baselines/reference/es6ExportAssignment2.errors.txt
index 248491f98c3..490d5867591 100644
--- a/tests/baselines/reference/es6ExportAssignment2.errors.txt
+++ b/tests/baselines/reference/es6ExportAssignment2.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/a.ts(3,1): error TS1203: Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead.
+tests/cases/compiler/a.ts(3,1): error TS1203: Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead.
 
 
 ==== tests/cases/compiler/a.ts (1 errors) ====
@@ -6,7 +6,7 @@ tests/cases/compiler/a.ts(3,1): error TS1203: Export assignment cannot be used w
     var a = 10;
     export = a;  // Error: export = not allowed in ES6
     ~~~~~~~~~~~
-!!! error TS1203: Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead.
+!!! error TS1203: Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead.
     
 ==== tests/cases/compiler/b.ts (0 errors) ====
     import * as a from "a";
diff --git a/tests/baselines/reference/es6ExportEquals.errors.txt b/tests/baselines/reference/es6ExportEquals.errors.txt
index e8db09456d3..8a6c6ceef37 100644
--- a/tests/baselines/reference/es6ExportEquals.errors.txt
+++ b/tests/baselines/reference/es6ExportEquals.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/compiler/es6ExportEquals.ts(4,1): error TS1203: Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead.
+tests/cases/compiler/es6ExportEquals.ts(4,1): error TS1203: Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead.
 tests/cases/compiler/es6ExportEquals.ts(4,1): error TS2309: An export assignment cannot be used in a module with other exported elements.
 
 
@@ -8,7 +8,7 @@ tests/cases/compiler/es6ExportEquals.ts(4,1): error TS2309: An export assignment
     
     export = f;
     ~~~~~~~~~~~
-!!! error TS1203: Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead.
+!!! error TS1203: Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead.
     ~~~~~~~~~~~
 !!! error TS2309: An export assignment cannot be used in a module with other exported elements.
     
\ No newline at end of file
diff --git a/tests/baselines/reference/es6ImportEqualsDeclaration.errors.txt b/tests/baselines/reference/es6ImportEqualsDeclaration.errors.txt
index 7de5d7f0e3d..fa0d9dc834a 100644
--- a/tests/baselines/reference/es6ImportEqualsDeclaration.errors.txt
+++ b/tests/baselines/reference/es6ImportEqualsDeclaration.errors.txt
@@ -1,15 +1,15 @@
-tests/cases/compiler/client.ts(1,1): error TS1202: Import assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
-tests/cases/compiler/server.ts(3,1): error TS1203: Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead.
+tests/cases/compiler/client.ts(1,1): error TS1202: Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
+tests/cases/compiler/server.ts(3,1): error TS1203: Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead.
 
 
 ==== tests/cases/compiler/client.ts (1 errors) ====
     import a = require("server");
     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1202: Import assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
+!!! error TS1202: Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
 ==== tests/cases/compiler/server.ts (1 errors) ====
     
     var a = 10;
     export = a;
     ~~~~~~~~~~~
-!!! error TS1203: Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead.
+!!! error TS1203: Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead.
     
\ No newline at end of file
diff --git a/tests/baselines/reference/templateStringInYieldKeyword.errors.txt b/tests/baselines/reference/templateStringInYieldKeyword.errors.txt
index 5761d1464e0..578c24e7ce9 100644
--- a/tests/baselines/reference/templateStringInYieldKeyword.errors.txt
+++ b/tests/baselines/reference/templateStringInYieldKeyword.errors.txt
@@ -1,10 +1,10 @@
-tests/cases/conformance/es6/templates/templateStringInYieldKeyword.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/conformance/es6/templates/templateStringInYieldKeyword.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/conformance/es6/templates/templateStringInYieldKeyword.ts (1 errors) ====
     function* gen() {
             ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
         // Once this is supported, the inner expression does not need to be parenthesized.
         var x = yield `abc${ x }def`;
     }
diff --git a/tests/baselines/reference/yieldExpression1.errors.txt b/tests/baselines/reference/yieldExpression1.errors.txt
index 8eefb9024de..2ab6f60fb76 100644
--- a/tests/baselines/reference/yieldExpression1.errors.txt
+++ b/tests/baselines/reference/yieldExpression1.errors.txt
@@ -1,9 +1,9 @@
-tests/cases/compiler/yieldExpression1.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+tests/cases/compiler/yieldExpression1.ts(1,9): error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
 
 
 ==== tests/cases/compiler/yieldExpression1.ts (1 errors) ====
     function* foo() {
             ~
-!!! error TS1220: Generators are only available when targeting ECMAScript 6 or higher.
+!!! error TS1220: Generators are only available when targeting ECMAScript 2015 or higher.
         yield
     }
\ No newline at end of file

From 5af8ba8bf8d9a452c857cdb94096b8e2f1ae9b74 Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Thu, 9 Jun 2016 22:07:07 -0700
Subject: [PATCH 245/332] Fixes an issue with runtests-parallel when global
 mocha is not installed.

---
 Jakefile.js               |  9 +++++++++
 scripts/mocha-parallel.js | 23 ++++++++---------------
 2 files changed, 17 insertions(+), 15 deletions(-)

diff --git a/Jakefile.js b/Jakefile.js
index cfcd4246046..4f0e231661e 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -740,16 +740,25 @@ function runConsoleTests(defaultReporter, runInParallel) {
         tests = tests ? ' -g "' + tests + '"' : '';
         var cmd = "mocha" + (debug ? " --debug-brk" : "") + " -R " + reporter + tests + colors + ' -t ' + testTimeout + ' ' + run;
         console.log(cmd);
+
+        var savedNodeEnv = process.env.NODE_ENV;
+        process.env.NODE_ENV = "development";
         exec(cmd, function () {
+            process.env.NODE_ENV = savedNodeEnv;
             runLinter();
             finish();
         }, function(e, status) {
+            process.env.NODE_ENV = savedNodeEnv;
             finish(status);
         });
 
     }
     else {
+        var savedNodeEnv = process.env.NODE_ENV;
+        process.env.NODE_ENV = "development";
         runTestsInParallel(taskConfigsFolder, run, { testTimeout: testTimeout, noColors: colors === " --no-colors " }, function (err) {
+            process.env.NODE_ENV = savedNodeEnv;
+
             // last worker clean everything and runs linter in case if there were no errors
             deleteTemporaryProjectOutput();
             jake.rmRf(taskConfigsFolder);
diff --git a/scripts/mocha-parallel.js b/scripts/mocha-parallel.js
index 159dd630cc2..cc695729cbd 100644
--- a/scripts/mocha-parallel.js
+++ b/scripts/mocha-parallel.js
@@ -34,13 +34,7 @@ function discoverTests(run, options, cb) {
     console.log("Discovering tests...");
 
     var cmd = "mocha -R " + require.resolve("./mocha-none-reporter.js") + " " + run;
-    var p = child_process.spawn(
-        process.platform === "win32" ? "cmd" : "/bin/sh",
-        process.platform === "win32" ? ["/c", cmd] : ["-c", cmd], {
-            windowsVerbatimArguments: true,
-            env: { NODE_ENV: "development" }
-        });
-
+    var p = spawnProcess(cmd);
     p.on("exit", function (status) {
         if (status) {
             cb(new Error("Process exited with code " + status));
@@ -87,18 +81,11 @@ function runTests(taskConfigsFolder, run, options, cb) {
 
         // Start the background process.
         var cmd = "mocha -t " + (options.testTimeout || 20000) + " -R tap --no-colors " + run + " --config='" + partition.file + "'";
-        var p = child_process.spawn(
-            process.platform === "win32" ? "cmd" : "/bin/sh",
-            process.platform === "win32" ? ["/c", cmd] : ["-c", cmd], {
-                windowsVerbatimArguments: true,
-                env: { NODE_ENV: "development" }
-            });
-
+        var p = spawnProcess(cmd);
         var rl = readline.createInterface({
             input: p.stdout,
             terminal: false
         });
-
         rl.on("line", onmessage);
         p.on("exit", onexit)
 
@@ -259,6 +246,12 @@ function runTests(taskConfigsFolder, run, options, cb) {
     }
 }
 
+function spawnProcess(cmd, options) {
+    var shell = process.platform === "win32" ? "cmd" : "/bin/sh";
+    var prefix = process.platform === "win32" ? "/c" : "-c";
+    return child_process.spawn(shell, [prefix, cmd], { windowsVerbatimArguments: true });
+}
+
 function ProgressBars(options) {
     if (!options) options = {};
     var open = options.open || '[';

From e6eb36ee7126915d508673223e6cc59be92ea608 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Fri, 10 Jun 2016 01:06:00 -0700
Subject: [PATCH 246/332] Update LKG

---
 lib/lib.d.ts                     |     14 +-
 lib/lib.es2017.d.ts              |      3 +-
 lib/lib.es2017.sharedmemory.d.ts |     43 +
 lib/lib.es5.d.ts                 |     14 +-
 lib/lib.es6.d.ts                 |     14 +-
 lib/tsc.js                       |  75696 +++++++++---------
 lib/tsserver.js                  | 104302 +++++++++++++------------
 lib/tsserverlibrary.d.ts         |  17363 ++--
 lib/tsserverlibrary.js           | 103834 ++++++++++++------------
 lib/typescript.d.ts              |   4996 +-
 lib/typescript.js                | 117286 ++++++++++++++--------------
 lib/typescriptServices.d.ts      |   4996 +-
 lib/typescriptServices.js        | 117286 ++++++++++++++--------------
 13 files changed, 274475 insertions(+), 271372 deletions(-)
 create mode 100644 lib/lib.es2017.sharedmemory.d.ts

diff --git a/lib/lib.d.ts b/lib/lib.d.ts
index 15745c5d533..2881834e678 100644
--- a/lib/lib.d.ts
+++ b/lib/lib.d.ts
@@ -152,12 +152,24 @@ interface ObjectConstructor {
       */
     getOwnPropertyNames(o: any): string[];
 
+    /**
+      * Creates an object that has null prototype.
+      * @param o Object to use as a prototype. May be null
+      */
+    create(o: null): any;
+
+    /**
+      * Creates an object that has the specified prototype, and that optionally contains specified properties.
+      * @param o Object to use as a prototype. May be null
+      */
+    create<T>(o: T): T;
+
     /**
       * Creates an object that has the specified prototype, and that optionally contains specified properties.
       * @param o Object to use as a prototype. May be null
       * @param properties JavaScript object that contains one or more property descriptors.
       */
-    create(o: any, properties?: PropertyDescriptorMap): any;
+    create(o: any, properties: PropertyDescriptorMap): any;
 
     /**
       * Adds a property to an object, or modifies attributes of an existing property.
diff --git a/lib/lib.es2017.d.ts b/lib/lib.es2017.d.ts
index 06dc9711df4..24d23994d96 100644
--- a/lib/lib.es2017.d.ts
+++ b/lib/lib.es2017.d.ts
@@ -15,4 +15,5 @@ and limitations under the License.
 
 /// <reference no-default-lib="true"/>
 /// <reference path="lib.es2016.d.ts" />
-/// <reference path="lib.es2017.object.d.ts" />
\ No newline at end of file
+/// <reference path="lib.es2017.object.d.ts" />
+/// <reference path="lib.es2017.sharedmemory.d.ts" />
\ No newline at end of file
diff --git a/lib/lib.es2017.sharedmemory.d.ts b/lib/lib.es2017.sharedmemory.d.ts
new file mode 100644
index 00000000000..639ca7530e4
--- /dev/null
+++ b/lib/lib.es2017.sharedmemory.d.ts
@@ -0,0 +1,43 @@
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved. 
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0  
+ 
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, 
+MERCHANTABLITY OR NON-INFRINGEMENT. 
+ 
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+/// <reference no-default-lib="true"/>
+/// <reference path="lib.es2015.symbol.d.ts" />
+/// <reference path="lib.es2015.symbol.wellknown.d.ts" />
+
+interface SharedArrayBuffer {
+    /**
+      * Read-only. The length of the ArrayBuffer (in bytes).
+      */
+    readonly byteLength: number;
+
+    /*
+     * The SharedArrayBuffer constructor's length property whose value is 1.
+     */
+    length: number;
+    /**
+      * Returns a section of an SharedArrayBuffer.
+      */ 
+    slice(begin:number, end?:number): SharedArrayBuffer;
+    readonly [Symbol.species]: SharedArrayBuffer;
+    readonly [Symbol.toStringTag]: "SharedArrayBuffer";
+}
+
+interface SharedArrayBufferConstructor {
+    readonly prototype: SharedArrayBuffer;
+    new (byteLength: number): SharedArrayBuffer;
+}
+
+declare var SharedArrayBuffer: SharedArrayBufferConstructor;
\ No newline at end of file
diff --git a/lib/lib.es5.d.ts b/lib/lib.es5.d.ts
index e4e0334e0cb..3b9e2d40fce 100644
--- a/lib/lib.es5.d.ts
+++ b/lib/lib.es5.d.ts
@@ -152,12 +152,24 @@ interface ObjectConstructor {
       */
     getOwnPropertyNames(o: any): string[];
 
+    /**
+      * Creates an object that has null prototype.
+      * @param o Object to use as a prototype. May be null
+      */
+    create(o: null): any;
+
+    /**
+      * Creates an object that has the specified prototype, and that optionally contains specified properties.
+      * @param o Object to use as a prototype. May be null
+      */
+    create<T>(o: T): T;
+
     /**
       * Creates an object that has the specified prototype, and that optionally contains specified properties.
       * @param o Object to use as a prototype. May be null
       * @param properties JavaScript object that contains one or more property descriptors.
       */
-    create(o: any, properties?: PropertyDescriptorMap): any;
+    create(o: any, properties: PropertyDescriptorMap): any;
 
     /**
       * Adds a property to an object, or modifies attributes of an existing property.
diff --git a/lib/lib.es6.d.ts b/lib/lib.es6.d.ts
index ae54e8e8570..a4b790b852b 100644
--- a/lib/lib.es6.d.ts
+++ b/lib/lib.es6.d.ts
@@ -152,12 +152,24 @@ interface ObjectConstructor {
       */
     getOwnPropertyNames(o: any): string[];
 
+    /**
+      * Creates an object that has null prototype.
+      * @param o Object to use as a prototype. May be null
+      */
+    create(o: null): any;
+
+    /**
+      * Creates an object that has the specified prototype, and that optionally contains specified properties.
+      * @param o Object to use as a prototype. May be null
+      */
+    create<T>(o: T): T;
+
     /**
       * Creates an object that has the specified prototype, and that optionally contains specified properties.
       * @param o Object to use as a prototype. May be null
       * @param properties JavaScript object that contains one or more property descriptors.
       */
-    create(o: any, properties?: PropertyDescriptorMap): any;
+    create(o: any, properties: PropertyDescriptorMap): any;
 
     /**
       * Adds a property to an object, or modifies attributes of an existing property.
diff --git a/lib/tsc.js b/lib/tsc.js
index 93e250202d2..a53870ecffe 100644
--- a/lib/tsc.js
+++ b/lib/tsc.js
@@ -13,37657 +13,38045 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
-var ts;
-(function (ts) {
-    var OperationCanceledException = (function () {
-        function OperationCanceledException() {
-        }
-        return OperationCanceledException;
-    }());
-    ts.OperationCanceledException = OperationCanceledException;
-    (function (ExitStatus) {
-        ExitStatus[ExitStatus["Success"] = 0] = "Success";
-        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
-        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
-    })(ts.ExitStatus || (ts.ExitStatus = {}));
-    var ExitStatus = ts.ExitStatus;
-    (function (TypeReferenceSerializationKind) {
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithConstructSignatureAndValue"] = 1] = "TypeWithConstructSignatureAndValue";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["VoidType"] = 2] = "VoidType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["NumberLikeType"] = 3] = "NumberLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["StringLikeType"] = 4] = "StringLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["BooleanType"] = 5] = "BooleanType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ArrayLikeType"] = 6] = "ArrayLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ESSymbolType"] = 7] = "ESSymbolType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 8] = "TypeWithCallSignature";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 9] = "ObjectType";
-    })(ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
-    var TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind;
-    (function (DiagnosticCategory) {
-        DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
-        DiagnosticCategory[DiagnosticCategory["Error"] = 1] = "Error";
-        DiagnosticCategory[DiagnosticCategory["Message"] = 2] = "Message";
-    })(ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
-    var DiagnosticCategory = ts.DiagnosticCategory;
-    (function (ModuleResolutionKind) {
-        ModuleResolutionKind[ModuleResolutionKind["Classic"] = 1] = "Classic";
-        ModuleResolutionKind[ModuleResolutionKind["NodeJs"] = 2] = "NodeJs";
-    })(ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
-    var ModuleResolutionKind = ts.ModuleResolutionKind;
-    (function (ModuleKind) {
-        ModuleKind[ModuleKind["None"] = 0] = "None";
-        ModuleKind[ModuleKind["CommonJS"] = 1] = "CommonJS";
-        ModuleKind[ModuleKind["AMD"] = 2] = "AMD";
-        ModuleKind[ModuleKind["UMD"] = 3] = "UMD";
-        ModuleKind[ModuleKind["System"] = 4] = "System";
-        ModuleKind[ModuleKind["ES6"] = 5] = "ES6";
-        ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
-    })(ts.ModuleKind || (ts.ModuleKind = {}));
-    var ModuleKind = ts.ModuleKind;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function createFileMap(keyMapper) {
-        var files = {};
-        return {
-            get: get,
-            set: set,
-            contains: contains,
-            remove: remove,
-            forEachValue: forEachValueInMap,
-            clear: clear
-        };
-        function forEachValueInMap(f) {
-            for (var key in files) {
-                f(key, files[key]);
-            }
-        }
-        function get(path) {
-            return files[toKey(path)];
-        }
-        function set(path, value) {
-            files[toKey(path)] = value;
-        }
-        function contains(path) {
-            return hasProperty(files, toKey(path));
-        }
-        function remove(path) {
-            var key = toKey(path);
-            delete files[key];
-        }
-        function clear() {
-            files = {};
-        }
-        function toKey(path) {
-            return keyMapper ? keyMapper(path) : path;
-        }
-    }
-    ts.createFileMap = createFileMap;
-    function toPath(fileName, basePath, getCanonicalFileName) {
-        var nonCanonicalizedPath = isRootedDiskPath(fileName)
-            ? normalizePath(fileName)
-            : getNormalizedAbsolutePath(fileName, basePath);
-        return getCanonicalFileName(nonCanonicalizedPath);
-    }
-    ts.toPath = toPath;
-    function forEach(array, callback) {
-        if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
-                var result = callback(array[i], i);
-                if (result) {
-                    return result;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.forEach = forEach;
-    function contains(array, value, areEqual) {
-        if (array) {
-            for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
-                var v = array_1[_i];
-                if (areEqual ? areEqual(v, value) : v === value) {
-                    return true;
-                }
-            }
-        }
-        return false;
-    }
-    ts.contains = contains;
-    function indexOf(array, value) {
-        if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
-                if (array[i] === value) {
-                    return i;
-                }
-            }
-        }
-        return -1;
-    }
-    ts.indexOf = indexOf;
-    function countWhere(array, predicate) {
-        var count = 0;
-        if (array) {
-            for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
-                var v = array_2[_i];
-                if (predicate(v)) {
-                    count++;
-                }
-            }
-        }
-        return count;
-    }
-    ts.countWhere = countWhere;
-    function filter(array, f) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_3 = array; _i < array_3.length; _i++) {
-                var item = array_3[_i];
-                if (f(item)) {
-                    result.push(item);
-                }
-            }
-        }
-        return result;
-    }
-    ts.filter = filter;
-    function map(array, f) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_4 = array; _i < array_4.length; _i++) {
-                var v = array_4[_i];
-                result.push(f(v));
-            }
-        }
-        return result;
-    }
-    ts.map = map;
-    function concatenate(array1, array2) {
-        if (!array2 || !array2.length)
-            return array1;
-        if (!array1 || !array1.length)
-            return array2;
-        return array1.concat(array2);
-    }
-    ts.concatenate = concatenate;
-    function deduplicate(array, areEqual) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
-                var item = array_5[_i];
-                if (!contains(result, item, areEqual)) {
-                    result.push(item);
-                }
-            }
-        }
-        return result;
-    }
-    ts.deduplicate = deduplicate;
-    function sum(array, prop) {
-        var result = 0;
-        for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
-            var v = array_6[_i];
-            result += v[prop];
-        }
-        return result;
-    }
-    ts.sum = sum;
-    function addRange(to, from) {
-        if (to && from) {
-            for (var _i = 0, from_1 = from; _i < from_1.length; _i++) {
-                var v = from_1[_i];
-                to.push(v);
-            }
-        }
-    }
-    ts.addRange = addRange;
-    function rangeEquals(array1, array2, pos, end) {
-        while (pos < end) {
-            if (array1[pos] !== array2[pos]) {
-                return false;
-            }
-            pos++;
-        }
-        return true;
-    }
-    ts.rangeEquals = rangeEquals;
-    function lastOrUndefined(array) {
-        if (array.length === 0) {
-            return undefined;
-        }
-        return array[array.length - 1];
-    }
-    ts.lastOrUndefined = lastOrUndefined;
-    function binarySearch(array, value) {
-        var low = 0;
-        var high = array.length - 1;
-        while (low <= high) {
-            var middle = low + ((high - low) >> 1);
-            var midValue = array[middle];
-            if (midValue === value) {
-                return middle;
-            }
-            else if (midValue > value) {
-                high = middle - 1;
-            }
-            else {
-                low = middle + 1;
-            }
-        }
-        return ~low;
-    }
-    ts.binarySearch = binarySearch;
-    function reduceLeft(array, f, initial) {
-        if (array) {
-            var count = array.length;
-            if (count > 0) {
-                var pos = 0;
-                var result = void 0;
-                if (arguments.length <= 2) {
-                    result = array[pos];
-                    pos++;
-                }
-                else {
-                    result = initial;
-                }
-                while (pos < count) {
-                    result = f(result, array[pos]);
-                    pos++;
-                }
-                return result;
-            }
-        }
-        return initial;
-    }
-    ts.reduceLeft = reduceLeft;
-    function reduceRight(array, f, initial) {
-        if (array) {
-            var pos = array.length - 1;
-            if (pos >= 0) {
-                var result = void 0;
-                if (arguments.length <= 2) {
-                    result = array[pos];
-                    pos--;
-                }
-                else {
-                    result = initial;
-                }
-                while (pos >= 0) {
-                    result = f(result, array[pos]);
-                    pos--;
-                }
-                return result;
-            }
-        }
-        return initial;
-    }
-    ts.reduceRight = reduceRight;
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-    function hasProperty(map, key) {
-        return hasOwnProperty.call(map, key);
-    }
-    ts.hasProperty = hasProperty;
-    function getKeys(map) {
-        var keys = [];
-        for (var key in map) {
-            keys.push(key);
-        }
-        return keys;
-    }
-    ts.getKeys = getKeys;
-    function getProperty(map, key) {
-        return hasOwnProperty.call(map, key) ? map[key] : undefined;
-    }
-    ts.getProperty = getProperty;
-    function isEmpty(map) {
-        for (var id in map) {
-            if (hasProperty(map, id)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.isEmpty = isEmpty;
-    function clone(object) {
-        var result = {};
-        for (var id in object) {
-            result[id] = object[id];
-        }
-        return result;
-    }
-    ts.clone = clone;
-    function extend(first, second) {
-        var result = {};
-        for (var id in first) {
-            result[id] = first[id];
-        }
-        for (var id in second) {
-            if (!hasProperty(result, id)) {
-                result[id] = second[id];
-            }
-        }
-        return result;
-    }
-    ts.extend = extend;
-    function forEachValue(map, callback) {
-        var result;
-        for (var id in map) {
-            if (result = callback(map[id]))
-                break;
-        }
-        return result;
-    }
-    ts.forEachValue = forEachValue;
-    function forEachKey(map, callback) {
-        var result;
-        for (var id in map) {
-            if (result = callback(id))
-                break;
-        }
-        return result;
-    }
-    ts.forEachKey = forEachKey;
-    function lookUp(map, key) {
-        return hasProperty(map, key) ? map[key] : undefined;
-    }
-    ts.lookUp = lookUp;
-    function copyMap(source, target) {
-        for (var p in source) {
-            target[p] = source[p];
-        }
-    }
-    ts.copyMap = copyMap;
-    function arrayToMap(array, makeKey) {
-        var result = {};
-        forEach(array, function (value) {
-            result[makeKey(value)] = value;
-        });
-        return result;
-    }
-    ts.arrayToMap = arrayToMap;
-    function reduceProperties(map, callback, initial) {
-        var result = initial;
-        if (map) {
-            for (var key in map) {
-                if (hasProperty(map, key)) {
-                    result = callback(result, map[key], String(key));
-                }
-            }
-        }
-        return result;
-    }
-    ts.reduceProperties = reduceProperties;
-    function isArray(value) {
-        return Array.isArray ? Array.isArray(value) : value instanceof Array;
-    }
-    ts.isArray = isArray;
-    function memoize(callback) {
-        var value;
-        return function () {
-            if (callback) {
-                value = callback();
-                callback = undefined;
-            }
-            return value;
-        };
-    }
-    ts.memoize = memoize;
-    function formatStringFromArgs(text, args, baseIndex) {
-        baseIndex = baseIndex || 0;
-        return text.replace(/{(\d+)}/g, function (match, index) { return args[+index + baseIndex]; });
-    }
-    ts.localizedDiagnosticMessages = undefined;
-    function getLocaleSpecificMessage(message) {
-        return ts.localizedDiagnosticMessages && ts.localizedDiagnosticMessages[message.key]
-            ? ts.localizedDiagnosticMessages[message.key]
-            : message.message;
-    }
-    ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
-    function createFileDiagnostic(file, start, length, message) {
-        var end = start + length;
-        Debug.assert(start >= 0, "start must be non-negative, is " + start);
-        Debug.assert(length >= 0, "length must be non-negative, is " + length);
-        if (file) {
-            Debug.assert(start <= file.text.length, "start must be within the bounds of the file. " + start + " > " + file.text.length);
-            Debug.assert(end <= file.text.length, "end must be the bounds of the file. " + end + " > " + file.text.length);
-        }
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 4) {
-            text = formatStringFromArgs(text, arguments, 4);
-        }
-        return {
-            file: file,
-            start: start,
-            length: length,
-            messageText: text,
-            category: message.category,
-            code: message.code
-        };
-    }
-    ts.createFileDiagnostic = createFileDiagnostic;
-    function formatMessage(dummy, message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 2) {
-            text = formatStringFromArgs(text, arguments, 2);
-        }
-        return text;
-    }
-    ts.formatMessage = formatMessage;
-    function createCompilerDiagnostic(message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 1) {
-            text = formatStringFromArgs(text, arguments, 1);
-        }
-        return {
-            file: undefined,
-            start: undefined,
-            length: undefined,
-            messageText: text,
-            category: message.category,
-            code: message.code
-        };
-    }
-    ts.createCompilerDiagnostic = createCompilerDiagnostic;
-    function chainDiagnosticMessages(details, message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 2) {
-            text = formatStringFromArgs(text, arguments, 2);
-        }
-        return {
-            messageText: text,
-            category: message.category,
-            code: message.code,
-            next: details
-        };
-    }
-    ts.chainDiagnosticMessages = chainDiagnosticMessages;
-    function concatenateDiagnosticMessageChains(headChain, tailChain) {
-        var lastChain = headChain;
-        while (lastChain.next) {
-            lastChain = lastChain.next;
-        }
-        lastChain.next = tailChain;
-        return headChain;
-    }
-    ts.concatenateDiagnosticMessageChains = concatenateDiagnosticMessageChains;
-    function compareValues(a, b) {
-        if (a === b)
-            return 0;
-        if (a === undefined)
-            return -1;
-        if (b === undefined)
-            return 1;
-        return a < b ? -1 : 1;
-    }
-    ts.compareValues = compareValues;
-    function getDiagnosticFileName(diagnostic) {
-        return diagnostic.file ? diagnostic.file.fileName : undefined;
-    }
-    function compareDiagnostics(d1, d2) {
-        return compareValues(getDiagnosticFileName(d1), getDiagnosticFileName(d2)) ||
-            compareValues(d1.start, d2.start) ||
-            compareValues(d1.length, d2.length) ||
-            compareValues(d1.code, d2.code) ||
-            compareMessageText(d1.messageText, d2.messageText) ||
-            0;
-    }
-    ts.compareDiagnostics = compareDiagnostics;
-    function compareMessageText(text1, text2) {
-        while (text1 && text2) {
-            var string1 = typeof text1 === "string" ? text1 : text1.messageText;
-            var string2 = typeof text2 === "string" ? text2 : text2.messageText;
-            var res = compareValues(string1, string2);
-            if (res) {
-                return res;
-            }
-            text1 = typeof text1 === "string" ? undefined : text1.next;
-            text2 = typeof text2 === "string" ? undefined : text2.next;
-        }
-        if (!text1 && !text2) {
-            return 0;
-        }
-        return text1 ? 1 : -1;
-    }
-    function sortAndDeduplicateDiagnostics(diagnostics) {
-        return deduplicateSortedDiagnostics(diagnostics.sort(compareDiagnostics));
-    }
-    ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
-    function deduplicateSortedDiagnostics(diagnostics) {
-        if (diagnostics.length < 2) {
-            return diagnostics;
-        }
-        var newDiagnostics = [diagnostics[0]];
-        var previousDiagnostic = diagnostics[0];
-        for (var i = 1; i < diagnostics.length; i++) {
-            var currentDiagnostic = diagnostics[i];
-            var isDupe = compareDiagnostics(currentDiagnostic, previousDiagnostic) === 0;
-            if (!isDupe) {
-                newDiagnostics.push(currentDiagnostic);
-                previousDiagnostic = currentDiagnostic;
-            }
-        }
-        return newDiagnostics;
-    }
-    ts.deduplicateSortedDiagnostics = deduplicateSortedDiagnostics;
-    function normalizeSlashes(path) {
-        return path.replace(/\\/g, "/");
-    }
-    ts.normalizeSlashes = normalizeSlashes;
-    function getRootLength(path) {
-        if (path.charCodeAt(0) === 47) {
-            if (path.charCodeAt(1) !== 47)
-                return 1;
-            var p1 = path.indexOf("/", 2);
-            if (p1 < 0)
-                return 2;
-            var p2 = path.indexOf("/", p1 + 1);
-            if (p2 < 0)
-                return p1 + 1;
-            return p2 + 1;
-        }
-        if (path.charCodeAt(1) === 58) {
-            if (path.charCodeAt(2) === 47)
-                return 3;
-            return 2;
-        }
-        if (path.lastIndexOf("file:///", 0) === 0) {
-            return "file:///".length;
-        }
-        var idx = path.indexOf("://");
-        if (idx !== -1) {
-            return idx + "://".length;
-        }
-        return 0;
-    }
-    ts.getRootLength = getRootLength;
-    ts.directorySeparator = "/";
-    function getNormalizedParts(normalizedSlashedPath, rootLength) {
-        var parts = normalizedSlashedPath.substr(rootLength).split(ts.directorySeparator);
-        var normalized = [];
-        for (var _i = 0, parts_1 = parts; _i < parts_1.length; _i++) {
-            var part = parts_1[_i];
-            if (part !== ".") {
-                if (part === ".." && normalized.length > 0 && lastOrUndefined(normalized) !== "..") {
-                    normalized.pop();
-                }
-                else {
-                    if (part) {
-                        normalized.push(part);
-                    }
-                }
-            }
-        }
-        return normalized;
-    }
-    function normalizePath(path) {
-        path = normalizeSlashes(path);
-        var rootLength = getRootLength(path);
-        var normalized = getNormalizedParts(path, rootLength);
-        return path.substr(0, rootLength) + normalized.join(ts.directorySeparator);
-    }
-    ts.normalizePath = normalizePath;
-    function getDirectoryPath(path) {
-        return path.substr(0, Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator)));
-    }
-    ts.getDirectoryPath = getDirectoryPath;
-    function isUrl(path) {
-        return path && !isRootedDiskPath(path) && path.indexOf("://") !== -1;
-    }
-    ts.isUrl = isUrl;
-    function isRootedDiskPath(path) {
-        return getRootLength(path) !== 0;
-    }
-    ts.isRootedDiskPath = isRootedDiskPath;
-    function normalizedPathComponents(path, rootLength) {
-        var normalizedParts = getNormalizedParts(path, rootLength);
-        return [path.substr(0, rootLength)].concat(normalizedParts);
-    }
-    function getNormalizedPathComponents(path, currentDirectory) {
-        path = normalizeSlashes(path);
-        var rootLength = getRootLength(path);
-        if (rootLength === 0) {
-            path = combinePaths(normalizeSlashes(currentDirectory), path);
-            rootLength = getRootLength(path);
-        }
-        return normalizedPathComponents(path, rootLength);
-    }
-    ts.getNormalizedPathComponents = getNormalizedPathComponents;
-    function getNormalizedAbsolutePath(fileName, currentDirectory) {
-        return getNormalizedPathFromPathComponents(getNormalizedPathComponents(fileName, currentDirectory));
-    }
-    ts.getNormalizedAbsolutePath = getNormalizedAbsolutePath;
-    function getNormalizedPathFromPathComponents(pathComponents) {
-        if (pathComponents && pathComponents.length) {
-            return pathComponents[0] + pathComponents.slice(1).join(ts.directorySeparator);
-        }
-    }
-    ts.getNormalizedPathFromPathComponents = getNormalizedPathFromPathComponents;
-    function getNormalizedPathComponentsOfUrl(url) {
-        var urlLength = url.length;
-        var rootLength = url.indexOf("://") + "://".length;
-        while (rootLength < urlLength) {
-            if (url.charCodeAt(rootLength) === 47) {
-                rootLength++;
-            }
-            else {
-                break;
-            }
-        }
-        if (rootLength === urlLength) {
-            return [url];
-        }
-        var indexOfNextSlash = url.indexOf(ts.directorySeparator, rootLength);
-        if (indexOfNextSlash !== -1) {
-            rootLength = indexOfNextSlash + 1;
-            return normalizedPathComponents(url, rootLength);
-        }
-        else {
-            return [url + ts.directorySeparator];
-        }
-    }
-    function getNormalizedPathOrUrlComponents(pathOrUrl, currentDirectory) {
-        if (isUrl(pathOrUrl)) {
-            return getNormalizedPathComponentsOfUrl(pathOrUrl);
-        }
-        else {
-            return getNormalizedPathComponents(pathOrUrl, currentDirectory);
-        }
-    }
-    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
-        var pathComponents = getNormalizedPathOrUrlComponents(relativeOrAbsolutePath, currentDirectory);
-        var directoryComponents = getNormalizedPathOrUrlComponents(directoryPathOrUrl, currentDirectory);
-        if (directoryComponents.length > 1 && lastOrUndefined(directoryComponents) === "") {
-            directoryComponents.length--;
-        }
-        var joinStartIndex;
-        for (joinStartIndex = 0; joinStartIndex < pathComponents.length && joinStartIndex < directoryComponents.length; joinStartIndex++) {
-            if (getCanonicalFileName(directoryComponents[joinStartIndex]) !== getCanonicalFileName(pathComponents[joinStartIndex])) {
-                break;
-            }
-        }
-        if (joinStartIndex) {
-            var relativePath = "";
-            var relativePathComponents = pathComponents.slice(joinStartIndex, pathComponents.length);
-            for (; joinStartIndex < directoryComponents.length; joinStartIndex++) {
-                if (directoryComponents[joinStartIndex] !== "") {
-                    relativePath = relativePath + ".." + ts.directorySeparator;
-                }
-            }
-            return relativePath + relativePathComponents.join(ts.directorySeparator);
-        }
-        var absolutePath = getNormalizedPathFromPathComponents(pathComponents);
-        if (isAbsolutePathAnUrl && isRootedDiskPath(absolutePath)) {
-            absolutePath = "file:///" + absolutePath;
-        }
-        return absolutePath;
-    }
-    ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
-    function getBaseFileName(path) {
-        if (path === undefined) {
-            return undefined;
-        }
-        var i = path.lastIndexOf(ts.directorySeparator);
-        return i < 0 ? path : path.substring(i + 1);
-    }
-    ts.getBaseFileName = getBaseFileName;
-    function combinePaths(path1, path2) {
-        if (!(path1 && path1.length))
-            return path2;
-        if (!(path2 && path2.length))
-            return path1;
-        if (getRootLength(path2) !== 0)
-            return path2;
-        if (path1.charAt(path1.length - 1) === ts.directorySeparator)
-            return path1 + path2;
-        return path1 + ts.directorySeparator + path2;
-    }
-    ts.combinePaths = combinePaths;
-    function fileExtensionIs(path, extension) {
-        var pathLen = path.length;
-        var extLen = extension.length;
-        return pathLen > extLen && path.substr(pathLen - extLen, extLen) === extension;
-    }
-    ts.fileExtensionIs = fileExtensionIs;
-    function ensureScriptKind(fileName, scriptKind) {
-        return (scriptKind || getScriptKindFromFileName(fileName)) || 3;
-    }
-    ts.ensureScriptKind = ensureScriptKind;
-    function getScriptKindFromFileName(fileName) {
-        var ext = fileName.substr(fileName.lastIndexOf("."));
-        switch (ext.toLowerCase()) {
-            case ".js":
-                return 1;
-            case ".jsx":
-                return 2;
-            case ".ts":
-                return 3;
-            case ".tsx":
-                return 4;
-            default:
-                return 0;
-        }
-    }
-    ts.getScriptKindFromFileName = getScriptKindFromFileName;
-    ts.supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
-    ts.supportedJavascriptExtensions = [".js", ".jsx"];
-    var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
-    function getSupportedExtensions(options) {
-        return options && options.allowJs ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
-    }
-    ts.getSupportedExtensions = getSupportedExtensions;
-    function isSupportedSourceFileName(fileName, compilerOptions) {
-        if (!fileName) {
-            return false;
-        }
-        for (var _i = 0, _a = getSupportedExtensions(compilerOptions); _i < _a.length; _i++) {
-            var extension = _a[_i];
-            if (fileExtensionIs(fileName, extension)) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.isSupportedSourceFileName = isSupportedSourceFileName;
-    var extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
-    function removeFileExtension(path) {
-        for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
-            var ext = extensionsToRemove_1[_i];
-            if (fileExtensionIs(path, ext)) {
-                return path.substr(0, path.length - ext.length);
-            }
-        }
-        return path;
-    }
-    ts.removeFileExtension = removeFileExtension;
-    function Symbol(flags, name) {
-        this.flags = flags;
-        this.name = name;
-        this.declarations = undefined;
-    }
-    function Type(checker, flags) {
-        this.flags = flags;
-    }
-    function Signature(checker) {
-    }
-    function Node(kind, pos, end) {
-        this.kind = kind;
-        this.pos = pos;
-        this.end = end;
-        this.flags = 0;
-        this.parent = undefined;
-    }
-    ts.objectAllocator = {
-        getNodeConstructor: function () { return Node; },
-        getSourceFileConstructor: function () { return Node; },
-        getSymbolConstructor: function () { return Symbol; },
-        getTypeConstructor: function () { return Type; },
-        getSignatureConstructor: function () { return Signature; }
-    };
-    var Debug;
-    (function (Debug) {
-        var currentAssertionLevel = 0;
-        function shouldAssert(level) {
-            return currentAssertionLevel >= level;
-        }
-        Debug.shouldAssert = shouldAssert;
-        function assert(expression, message, verboseDebugInfo) {
-            if (!expression) {
-                var verboseDebugString = "";
-                if (verboseDebugInfo) {
-                    verboseDebugString = "\r\nVerbose Debug Information: " + verboseDebugInfo();
-                }
-                debugger;
-                throw new Error("Debug Failure. False expression: " + (message || "") + verboseDebugString);
-            }
-        }
-        Debug.assert = assert;
-        function fail(message) {
-            Debug.assert(false, message);
-        }
-        Debug.fail = fail;
-    })(Debug = ts.Debug || (ts.Debug = {}));
-    function copyListRemovingItem(item, list) {
-        var copiedList = [];
-        for (var _i = 0, list_1 = list; _i < list_1.length; _i++) {
-            var e = list_1[_i];
-            if (e !== item) {
-                copiedList.push(e);
-            }
-        }
-        return copiedList;
-    }
-    ts.copyListRemovingItem = copyListRemovingItem;
-    function createGetCanonicalFileName(useCaseSensitivefileNames) {
-        return useCaseSensitivefileNames
-            ? (function (fileName) { return fileName; })
-            : (function (fileName) { return fileName.toLowerCase(); });
-    }
-    ts.createGetCanonicalFileName = createGetCanonicalFileName;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.sys = (function () {
-        function getWScriptSystem() {
-            var fso = new ActiveXObject("Scripting.FileSystemObject");
-            var fileStream = new ActiveXObject("ADODB.Stream");
-            fileStream.Type = 2;
-            var binaryStream = new ActiveXObject("ADODB.Stream");
-            binaryStream.Type = 1;
-            var args = [];
-            for (var i = 0; i < WScript.Arguments.length; i++) {
-                args[i] = WScript.Arguments.Item(i);
-            }
-            function readFile(fileName, encoding) {
-                if (!fso.FileExists(fileName)) {
-                    return undefined;
-                }
-                fileStream.Open();
-                try {
-                    if (encoding) {
-                        fileStream.Charset = encoding;
-                        fileStream.LoadFromFile(fileName);
-                    }
-                    else {
-                        fileStream.Charset = "x-ansi";
-                        fileStream.LoadFromFile(fileName);
-                        var bom = fileStream.ReadText(2) || "";
-                        fileStream.Position = 0;
-                        fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
-                    }
-                    return fileStream.ReadText();
-                }
-                catch (e) {
-                    throw e;
-                }
-                finally {
-                    fileStream.Close();
-                }
-            }
-            function writeFile(fileName, data, writeByteOrderMark) {
-                fileStream.Open();
-                binaryStream.Open();
-                try {
-                    fileStream.Charset = "utf-8";
-                    fileStream.WriteText(data);
-                    if (writeByteOrderMark) {
-                        fileStream.Position = 0;
-                    }
-                    else {
-                        fileStream.Position = 3;
-                    }
-                    fileStream.CopyTo(binaryStream);
-                    binaryStream.SaveToFile(fileName, 2);
-                }
-                finally {
-                    binaryStream.Close();
-                    fileStream.Close();
-                }
-            }
-            function getCanonicalPath(path) {
-                return path.toLowerCase();
-            }
-            function getNames(collection) {
-                var result = [];
-                for (var e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
-                    result.push(e.item().Name);
-                }
-                return result.sort();
-            }
-            function getDirectories(path) {
-                var folder = fso.GetFolder(path);
-                return getNames(folder.subfolders);
-            }
-            function readDirectory(path, extension, exclude) {
-                var result = [];
-                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
-                visitDirectory(path);
-                return result;
-                function visitDirectory(path) {
-                    var folder = fso.GetFolder(path || ".");
-                    var files = getNames(folder.files);
-                    for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
-                        var current = files_1[_i];
-                        var name_1 = ts.combinePaths(path, current);
-                        if ((!extension || ts.fileExtensionIs(name_1, extension)) && !ts.contains(exclude, getCanonicalPath(name_1))) {
-                            result.push(name_1);
-                        }
-                    }
-                    var subfolders = getNames(folder.subfolders);
-                    for (var _a = 0, subfolders_1 = subfolders; _a < subfolders_1.length; _a++) {
-                        var current = subfolders_1[_a];
-                        var name_2 = ts.combinePaths(path, current);
-                        if (!ts.contains(exclude, getCanonicalPath(name_2))) {
-                            visitDirectory(name_2);
-                        }
-                    }
-                }
-            }
-            return {
-                args: args,
-                newLine: "\r\n",
-                useCaseSensitiveFileNames: false,
-                write: function (s) {
-                    WScript.StdOut.Write(s);
-                },
-                readFile: readFile,
-                writeFile: writeFile,
-                resolvePath: function (path) {
-                    return fso.GetAbsolutePathName(path);
-                },
-                fileExists: function (path) {
-                    return fso.FileExists(path);
-                },
-                directoryExists: function (path) {
-                    return fso.FolderExists(path);
-                },
-                createDirectory: function (directoryName) {
-                    if (!this.directoryExists(directoryName)) {
-                        fso.CreateFolder(directoryName);
-                    }
-                },
-                getExecutingFilePath: function () {
-                    return WScript.ScriptFullName;
-                },
-                getCurrentDirectory: function () {
-                    return new ActiveXObject("WScript.Shell").CurrentDirectory;
-                },
-                getDirectories: getDirectories,
-                readDirectory: readDirectory,
-                exit: function (exitCode) {
-                    try {
-                        WScript.Quit(exitCode);
-                    }
-                    catch (e) {
-                    }
-                }
-            };
-        }
-        function getNodeSystem() {
-            var _fs = require("fs");
-            var _path = require("path");
-            var _os = require("os");
-            var _crypto = require("crypto");
-            var useNonPollingWatchers = process.env["TSC_NONPOLLING_WATCHER"];
-            function createWatchedFileSet() {
-                var dirWatchers = {};
-                var fileWatcherCallbacks = {};
-                return { addFile: addFile, removeFile: removeFile };
-                function reduceDirWatcherRefCountForFile(fileName) {
-                    var dirName = ts.getDirectoryPath(fileName);
-                    if (ts.hasProperty(dirWatchers, dirName)) {
-                        var watcher = dirWatchers[dirName];
-                        watcher.referenceCount -= 1;
-                        if (watcher.referenceCount <= 0) {
-                            watcher.close();
-                            delete dirWatchers[dirName];
-                        }
-                    }
-                }
-                function addDirWatcher(dirPath) {
-                    if (ts.hasProperty(dirWatchers, dirPath)) {
-                        var watcher_1 = dirWatchers[dirPath];
-                        watcher_1.referenceCount += 1;
-                        return;
-                    }
-                    var watcher = _fs.watch(dirPath, { persistent: true }, function (eventName, relativeFileName) { return fileEventHandler(eventName, relativeFileName, dirPath); });
-                    watcher.referenceCount = 1;
-                    dirWatchers[dirPath] = watcher;
-                    return;
-                }
-                function addFileWatcherCallback(filePath, callback) {
-                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
-                        fileWatcherCallbacks[filePath].push(callback);
-                    }
-                    else {
-                        fileWatcherCallbacks[filePath] = [callback];
-                    }
-                }
-                function addFile(fileName, callback) {
-                    addFileWatcherCallback(fileName, callback);
-                    addDirWatcher(ts.getDirectoryPath(fileName));
-                    return { fileName: fileName, callback: callback };
-                }
-                function removeFile(watchedFile) {
-                    removeFileWatcherCallback(watchedFile.fileName, watchedFile.callback);
-                    reduceDirWatcherRefCountForFile(watchedFile.fileName);
-                }
-                function removeFileWatcherCallback(filePath, callback) {
-                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
-                        var newCallbacks = ts.copyListRemovingItem(callback, fileWatcherCallbacks[filePath]);
-                        if (newCallbacks.length === 0) {
-                            delete fileWatcherCallbacks[filePath];
-                        }
-                        else {
-                            fileWatcherCallbacks[filePath] = newCallbacks;
-                        }
-                    }
-                }
-                function fileEventHandler(eventName, relativeFileName, baseDirPath) {
-                    var fileName = typeof relativeFileName !== "string"
-                        ? undefined
-                        : ts.getNormalizedAbsolutePath(relativeFileName, baseDirPath);
-                    if ((eventName === "change" || eventName === "rename") && ts.hasProperty(fileWatcherCallbacks, fileName)) {
-                        for (var _i = 0, _a = fileWatcherCallbacks[fileName]; _i < _a.length; _i++) {
-                            var fileCallback = _a[_i];
-                            fileCallback(fileName);
-                        }
-                    }
-                }
-            }
-            var watchedFileSet = createWatchedFileSet();
-            function isNode4OrLater() {
-                return parseInt(process.version.charAt(1)) >= 4;
-            }
-            var platform = _os.platform();
-            var useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
-            function readFile(fileName, encoding) {
-                if (!fileExists(fileName)) {
-                    return undefined;
-                }
-                var buffer = _fs.readFileSync(fileName);
-                var len = buffer.length;
-                if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
-                    len &= ~1;
-                    for (var i = 0; i < len; i += 2) {
-                        var temp = buffer[i];
-                        buffer[i] = buffer[i + 1];
-                        buffer[i + 1] = temp;
-                    }
-                    return buffer.toString("utf16le", 2);
-                }
-                if (len >= 2 && buffer[0] === 0xFF && buffer[1] === 0xFE) {
-                    return buffer.toString("utf16le", 2);
-                }
-                if (len >= 3 && buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
-                    return buffer.toString("utf8", 3);
-                }
-                return buffer.toString("utf8");
-            }
-            function writeFile(fileName, data, writeByteOrderMark) {
-                if (writeByteOrderMark) {
-                    data = "\uFEFF" + data;
-                }
-                var fd;
-                try {
-                    fd = _fs.openSync(fileName, "w");
-                    _fs.writeSync(fd, data, undefined, "utf8");
-                }
-                finally {
-                    if (fd !== undefined) {
-                        _fs.closeSync(fd);
-                    }
-                }
-            }
-            function getCanonicalPath(path) {
-                return useCaseSensitiveFileNames ? path : path.toLowerCase();
-            }
-            function fileSystemEntryExists(path, entryKind) {
-                try {
-                    var stat = _fs.statSync(path);
-                    switch (entryKind) {
-                        case 0: return stat.isFile();
-                        case 1: return stat.isDirectory();
-                    }
-                }
-                catch (e) {
-                    return false;
-                }
-            }
-            function fileExists(path) {
-                return fileSystemEntryExists(path, 0);
-            }
-            function directoryExists(path) {
-                return fileSystemEntryExists(path, 1);
-            }
-            function getDirectories(path) {
-                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1); });
-            }
-            function readDirectory(path, extension, exclude) {
-                var result = [];
-                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
-                visitDirectory(path);
-                return result;
-                function visitDirectory(path) {
-                    var files = _fs.readdirSync(path || ".").sort();
-                    var directories = [];
-                    for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
-                        var current = files_2[_i];
-                        if (current === "." || current === "..") {
-                            continue;
-                        }
-                        var name_3 = ts.combinePaths(path, current);
-                        if (!ts.contains(exclude, getCanonicalPath(name_3))) {
-                            var stat = _fs.statSync(name_3);
-                            if (stat.isFile()) {
-                                if (!extension || ts.fileExtensionIs(name_3, extension)) {
-                                    result.push(name_3);
-                                }
-                            }
-                            else if (stat.isDirectory()) {
-                                directories.push(name_3);
-                            }
-                        }
-                    }
-                    for (var _a = 0, directories_1 = directories; _a < directories_1.length; _a++) {
-                        var current = directories_1[_a];
-                        visitDirectory(current);
-                    }
-                }
-            }
-            return {
-                args: process.argv.slice(2),
-                newLine: _os.EOL,
-                useCaseSensitiveFileNames: useCaseSensitiveFileNames,
-                write: function (s) {
-                    process.stdout.write(s);
-                },
-                readFile: readFile,
-                writeFile: writeFile,
-                watchFile: function (fileName, callback) {
-                    if (useNonPollingWatchers) {
-                        var watchedFile_1 = watchedFileSet.addFile(fileName, callback);
-                        return {
-                            close: function () { return watchedFileSet.removeFile(watchedFile_1); }
-                        };
-                    }
-                    else {
-                        _fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
-                        return {
-                            close: function () { return _fs.unwatchFile(fileName, fileChanged); }
-                        };
-                    }
-                    function fileChanged(curr, prev) {
-                        if (+curr.mtime <= +prev.mtime) {
-                            return;
-                        }
-                        callback(fileName);
-                    }
-                },
-                watchDirectory: function (directoryName, callback, recursive) {
-                    var options;
-                    if (isNode4OrLater() && (process.platform === "win32" || process.platform === "darwin")) {
-                        options = { persistent: true, recursive: !!recursive };
-                    }
-                    else {
-                        options = { persistent: true };
-                    }
-                    return _fs.watch(directoryName, options, function (eventName, relativeFileName) {
-                        if (eventName === "rename") {
-                            callback(!relativeFileName ? relativeFileName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
-                        }
-                        ;
-                    });
-                },
-                resolvePath: function (path) {
-                    return _path.resolve(path);
-                },
-                fileExists: fileExists,
-                directoryExists: directoryExists,
-                createDirectory: function (directoryName) {
-                    if (!this.directoryExists(directoryName)) {
-                        _fs.mkdirSync(directoryName);
-                    }
-                },
-                getExecutingFilePath: function () {
-                    return __filename;
-                },
-                getCurrentDirectory: function () {
-                    return process.cwd();
-                },
-                getDirectories: getDirectories,
-                readDirectory: readDirectory,
-                getModifiedTime: function (path) {
-                    try {
-                        return _fs.statSync(path).mtime;
-                    }
-                    catch (e) {
-                        return undefined;
-                    }
-                },
-                createHash: function (data) {
-                    var hash = _crypto.createHash("md5");
-                    hash.update(data);
-                    return hash.digest("hex");
-                },
-                getMemoryUsage: function () {
-                    if (global.gc) {
-                        global.gc();
-                    }
-                    return process.memoryUsage().heapUsed;
-                },
-                exit: function (exitCode) {
-                    process.exit(exitCode);
-                },
-                realpath: function (path) {
-                    return _fs.realpathSync(path);
-                }
-            };
-        }
-        function getChakraSystem() {
-            var realpath = ChakraHost.realpath && (function (path) { return ChakraHost.realpath(path); });
-            return {
-                newLine: ChakraHost.newLine || "\r\n",
-                args: ChakraHost.args,
-                useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
-                write: ChakraHost.echo,
-                readFile: function (path, encoding) {
-                    return ChakraHost.readFile(path);
-                },
-                writeFile: function (path, data, writeByteOrderMark) {
-                    if (writeByteOrderMark) {
-                        data = "\uFEFF" + data;
-                    }
-                    ChakraHost.writeFile(path, data);
-                },
-                resolvePath: ChakraHost.resolvePath,
-                fileExists: ChakraHost.fileExists,
-                directoryExists: ChakraHost.directoryExists,
-                createDirectory: ChakraHost.createDirectory,
-                getExecutingFilePath: function () { return ChakraHost.executingFile; },
-                getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
-                getDirectories: ChakraHost.getDirectories,
-                readDirectory: ChakraHost.readDirectory,
-                exit: ChakraHost.quit,
-                realpath: realpath
-            };
-        }
-        if (typeof ChakraHost !== "undefined") {
-            return getChakraSystem();
-        }
-        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
-            return getWScriptSystem();
-        }
-        else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
-            return getNodeSystem();
-        }
-        else {
-            return undefined;
-        }
-    })();
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.Diagnostics = {
-        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
-        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
-        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
-        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
-        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
-        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
-        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
-        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
-        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
-        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
-        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
-        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
-        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
-        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
-        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
-        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
-        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
-        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
-        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
-        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
-        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
-        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
-        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
-        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
-        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
-        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
-        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
-        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
-        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
-        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
-        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
-        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
-        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
-        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
-        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
-        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
-        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
-        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
-        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
-        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
-        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
-        Type_0_is_not_a_valid_async_function_return_type: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_1055", message: "Type '{0}' is not a valid async function return type." },
-        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
-        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
-        Operand_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "Operand_for_await_does_not_have_a_valid_callable_then_member_1058", message: "Operand for 'await' does not have a valid callable 'then' member." },
-        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: { code: 1059, category: ts.DiagnosticCategory.Error, key: "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059", message: "Return expression in async function does not have a valid callable 'then' member." },
-        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: { code: 1060, category: ts.DiagnosticCategory.Error, key: "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060", message: "Expression body for async arrow function does not have a valid callable 'then' member." },
-        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
-        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
-        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
-        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
-        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
-        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
-        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
-        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
-        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
-        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
-        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher." },
-        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
-        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
-        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
-        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
-        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
-        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
-        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
-        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
-        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
-        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
-        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
-        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
-        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
-        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
-        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
-        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
-        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
-        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
-        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
-        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
-        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
-        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'" },
-        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
-        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
-        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
-        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
-        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
-        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
-        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
-        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
-        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
-        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
-        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
-        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
-        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
-        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
-        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
-        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
-        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
-        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
-        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
-        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
-        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
-        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
-        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
-        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
-        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
-        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
-        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
-        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
-        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
-        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
-        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
-        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
-        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
-        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
-        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
-        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
-        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
-        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
-        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
-        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
-        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
-        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
-        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
-        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
-        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
-        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
-        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
-        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
-        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
-        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
-        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
-        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
-        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
-        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
-        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
-        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
-        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
-        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
-        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
-        A_parameter_property_may_not_be_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_a_binding_pattern_1187", message: "A parameter property may not be a binding pattern." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
-        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
-        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
-        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
-        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
-        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
-        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
-        Catch_clause_variable_name_must_be_an_identifier: { code: 1195, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_name_must_be_an_identifier_1195", message: "Catch clause variable name must be an identifier." },
-        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
-        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
-        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
-        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
-        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
-        Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
-        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
-        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
-        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
-        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
-        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
-        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
-        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
-        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
-        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
-        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
-        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
-        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
-        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
-        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
-        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
-        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
-        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
-        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
-        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
-        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
-        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
-        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
-        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
-        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
-        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
-        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
-        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
-        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
-        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
-        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
-        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
-        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
-        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
-        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
-        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
-        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
-        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
-        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
-        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
-        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
-        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
-        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
-        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
-        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
-        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
-        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
-        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
-        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
-        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
-        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
-        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
-        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
-        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
-        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
-        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
-        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
-        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
-        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
-        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
-        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
-        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
-        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
-        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
-        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
-        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
-        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
-        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
-        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
-        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
-        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
-        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
-        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
-        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
-        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
-        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
-        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
-        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
-        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
-        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
-        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
-        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
-        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
-        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
-        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
-        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
-        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
-        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
-        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
-        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
-        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
-        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
-        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
-        Supplied_parameters_do_not_match_any_signature_of_call_target: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Supplied_parameters_do_not_match_any_signature_of_call_target_2346", message: "Supplied parameters do not match any signature of call target." },
-        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
-        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
-        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_2349", message: "Cannot invoke an expression whose type lacks a call signature." },
-        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
-        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
-        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
-        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
-        No_best_common_type_exists_among_return_expressions: { code: 2354, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_return_expressions_2354", message: "No best common type exists among return expressions." },
-        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
-        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
-        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357", message: "The operand of an increment or decrement operator must be a variable, property or indexer." },
-        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
-        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
-        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
-        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter" },
-        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_of_assignment_expression_2364", message: "Invalid left-hand side of assignment expression." },
-        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
-        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
-        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'" },
-        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
-        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
-        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
-        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
-        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
-        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
-        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
-        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
-        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
-        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
-        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
-        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
-        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
-        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
-        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
-        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
-        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
-        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
-        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
-        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
-        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
-        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
-        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
-        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
-        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
-        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
-        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
-        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
-        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
-        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
-        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
-        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
-        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
-        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
-        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
-        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
-        Invalid_left_hand_side_in_for_in_statement: { code: 2406, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_in_statement_2406", message: "Invalid left-hand side in 'for...in' statement." },
-        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
-        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
-        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class" },
-        All_symbols_within_a_with_block_will_be_resolved_to_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "All_symbols_within_a_with_block_will_be_resolved_to_any_2410", message: "All symbols within a 'with' block will be resolved to 'any'." },
-        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
-        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
-        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
-        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'" },
-        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
-        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
-        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
-        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
-        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
-        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
-        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'" },
-        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
-        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
-        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'" },
-        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
-        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged" },
-        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged" },
-        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
-        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
-        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name" },
-        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'" },
-        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
-        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'" },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
-        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
-        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
-        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
-        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
-        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
-        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
-        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
-        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: { code: 2449, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449", message: "The operand of an increment or decrement operator cannot be a constant or a read-only property." },
-        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450", message: "Left-hand side of assignment expression cannot be a constant or a read-only property." },
-        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
-        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
-        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
-        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
-        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
-        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
-        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'" },
-        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
-        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
-        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
-        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
-        A_rest_element_must_be_last_in_an_array_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462", message: "A rest element must be last in an array destructuring pattern" },
-        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
-        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
-        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
-        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
-        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
-        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
-        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
-        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
-        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
-        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
-        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
-        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
-        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
-        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
-        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
-        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
-        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
-        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
-        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
-        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
-        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'" },
-        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2485, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485", message: "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2486, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486", message: "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property." },
-        Invalid_left_hand_side_in_for_of_statement: { code: 2487, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_of_statement_2487", message: "Invalid left-hand side in 'for...of' statement." },
-        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
-        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
-        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
-        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause" },
-        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
-        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
-        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
-        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
-        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
-        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
-        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
-        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
-        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
-        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
-        No_best_common_type_exists_among_yield_expressions: { code: 2504, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_yield_expressions_2504", message: "No best common type exists among yield expressions." },
-        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
-        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
-        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
-        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
-        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
-        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
-        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
-        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
-        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
-        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
-        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
-        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
-        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
-        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
-        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
-        The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_function_expression: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_2522", message: "The 'arguments' object cannot be referenced in an async arrow function. Consider using a standard async function expression." },
-        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
-        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
-        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
-        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
-        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
-        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
-        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
-        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
-        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
-        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
-        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
-        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
-        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
-        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
-        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'" },
-        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
-        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
-        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
-        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property" },
-        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property" },
-        Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: ts.DiagnosticCategory.Error, key: "Cannot_emit_namespaced_JSX_elements_in_React_2650", message: "Cannot emit namespaced JSX elements in React" },
-        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
-        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
-        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
-        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
-        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
-        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element" },
-        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'" },
-        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
-        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
-        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
-        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
-        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
-        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
-        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
-        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
-        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
-        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
-        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
-        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
-        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
-        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
-        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
-        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
-        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
-        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
-        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
-        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: { code: 2679, category: ts.DiagnosticCategory.Error, key: "A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void_2679", message: "A function that is called with the 'new' keyword cannot have a 'this' type that is 'void'." },
-        A_this_parameter_must_be_the_first_parameter: { code: 2680, category: ts.DiagnosticCategory.Error, key: "A_this_parameter_must_be_the_first_parameter_2680", message: "A 'this' parameter must be the first parameter." },
-        A_constructor_cannot_have_a_this_parameter: { code: 2681, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_have_a_this_parameter_2681", message: "A constructor cannot have a 'this' parameter." },
-        get_and_set_accessor_must_have_the_same_this_type: { code: 2682, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_this_type_2682", message: "'get' and 'set' accessor must have the same 'this' type." },
-        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
-        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
-        The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
-        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
-        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
-        Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
-        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4006, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4006", message: "Type parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4008, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4008", message: "Type parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4010, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4010", message: "Type parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4012, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4012", message: "Type parameter '{0}' of public method from exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4014, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", message: "Type parameter '{0}' of method from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4016, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", message: "Type parameter '{0}' of exported function has or is using private name '{1}'." },
-        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4019, category: ts.DiagnosticCategory.Error, key: "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", message: "Implements clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "Extends clause of exported interface '{0}' has or is using private name '{1}'." },
-        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4023, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", message: "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named." },
-        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: { code: 4024, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", message: "Exported variable '{0}' has or is using name '{1}' from private module '{2}'." },
-        Exported_variable_0_has_or_is_using_private_name_1: { code: 4025, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_private_name_1_4025", message: "Exported variable '{0}' has or is using private name '{1}'." },
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4026, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026", message: "Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4027, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4027", message: "Public static property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
-        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4028, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_private_name_1_4028", message: "Public static property '{0}' of exported class has or is using private name '{1}'." },
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4029, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029", message: "Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4030, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4030", message: "Public property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
-        Public_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4031, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_private_name_1_4031", message: "Public property '{0}' of exported class has or is using private name '{1}'." },
-        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4032, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4032", message: "Property '{0}' of exported interface has or is using name '{1}' from private module '{2}'." },
-        Property_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4033, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_private_name_1_4033", message: "Property '{0}' of exported interface has or is using private name '{1}'." },
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4034, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_4034", message: "Parameter '{0}' of public static property setter from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4035, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1_4035", message: "Parameter '{0}' of public static property setter from exported class has or is using private name '{1}'." },
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4036, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_4036", message: "Parameter '{0}' of public property setter from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4037, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1_4037", message: "Parameter '{0}' of public property setter from exported class has or is using private name '{1}'." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4038, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_externa_4038", message: "Return type of public static property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4039, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_4039", message: "Return type of public static property getter from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4040, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0_4040", message: "Return type of public static property getter from exported class has or is using private name '{0}'." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4041, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_modul_4041", message: "Return type of public property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4042, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_4042", message: "Return type of public property getter from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4043, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0_4043", message: "Return type of public property getter from exported class has or is using private name '{0}'." },
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4044, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_mod_4044", message: "Return type of constructor signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4045, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0_4045", message: "Return type of constructor signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4046, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4046", message: "Return type of call signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4047, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0_4047", message: "Return type of call signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4048, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4048", message: "Return type of index signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4049, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0_4049", message: "Return type of index signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4050, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module__4050", message: "Return type of public static method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4051, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4051", message: "Return type of public static method from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: { code: 4052, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0_4052", message: "Return type of public static method from exported class has or is using private name '{0}'." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4053, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_c_4053", message: "Return type of public method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4054, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4054", message: "Return type of public method from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: { code: 4055, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0_4055", message: "Return type of public method from exported class has or is using private name '{0}'." },
-        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4056, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4056", message: "Return type of method from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: { code: 4057, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0_4057", message: "Return type of method from exported interface has or is using private name '{0}'." },
-        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4058, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named_4058", message: "Return type of exported function has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: { code: 4059, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1_4059", message: "Return type of exported function has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_exported_function_has_or_is_using_private_name_0: { code: 4060, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_private_name_0_4060", message: "Return type of exported function has or is using private name '{0}'." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4061, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_can_4061", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4062, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2_4062", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: { code: 4063, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1_4063", message: "Parameter '{0}' of constructor from exported class has or is using private name '{1}'." },
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4064, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_mod_4064", message: "Parameter '{0}' of constructor signature from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4065, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4065", message: "Parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4066, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4066", message: "Parameter '{0}' of call signature from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4067, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4067", message: "Parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4068, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module__4068", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4069, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4069", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4070, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4070", message: "Parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4071, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_c_4071", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4072, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4072", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4073, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4073", message: "Parameter '{0}' of public method from exported class has or is using private name '{1}'." },
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4074, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4074", message: "Parameter '{0}' of method from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4075, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4075", message: "Parameter '{0}' of method from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4076, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4076", message: "Parameter '{0}' of exported function has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: { code: 4077, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2_4077", message: "Parameter '{0}' of exported function has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4078, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", message: "Parameter '{0}' of exported function has or is using private name '{1}'." },
-        Exported_type_alias_0_has_or_is_using_private_name_1: { code: 4081, category: ts.DiagnosticCategory.Error, key: "Exported_type_alias_0_has_or_is_using_private_name_1_4081", message: "Exported type alias '{0}' has or is using private name '{1}'." },
-        Default_export_of_the_module_has_or_is_using_private_name_0: { code: 4082, category: ts.DiagnosticCategory.Error, key: "Default_export_of_the_module_has_or_is_using_private_name_0_4082", message: "Default export of the module has or is using private name '{0}'." },
-        Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict: { code: 4090, category: ts.DiagnosticCategory.Message, key: "Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_t_4090", message: "Conflicting library definitions for '{0}' found at '{1}' and '{2}'. Copy the correct file to the 'typings' folder to resolve this conflict." },
-        The_current_host_does_not_support_the_0_option: { code: 5001, category: ts.DiagnosticCategory.Error, key: "The_current_host_does_not_support_the_0_option_5001", message: "The current host does not support the '{0}' option." },
-        Cannot_find_the_common_subdirectory_path_for_the_input_files: { code: 5009, category: ts.DiagnosticCategory.Error, key: "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", message: "Cannot find the common subdirectory path for the input files." },
-        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}" },
-        Unsupported_file_encoding: { code: 5013, category: ts.DiagnosticCategory.Error, key: "Unsupported_file_encoding_5013", message: "Unsupported file encoding." },
-        Failed_to_parse_file_0_Colon_1: { code: 5014, category: ts.DiagnosticCategory.Error, key: "Failed_to_parse_file_0_Colon_1_5014", message: "Failed to parse file '{0}': {1}." },
-        Unknown_compiler_option_0: { code: 5023, category: ts.DiagnosticCategory.Error, key: "Unknown_compiler_option_0_5023", message: "Unknown compiler option '{0}'." },
-        Compiler_option_0_requires_a_value_of_type_1: { code: 5024, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_requires_a_value_of_type_1_5024", message: "Compiler option '{0}' requires a value of type {1}." },
-        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}" },
-        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: { code: 5042, category: ts.DiagnosticCategory.Error, key: "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", message: "Option 'project' cannot be mixed with source files on a command line." },
-        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: { code: 5047, category: ts.DiagnosticCategory.Error, key: "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", message: "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher." },
-        Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: { code: 5051, category: ts.DiagnosticCategory.Error, key: "Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_prov_5051", message: "Option 'inlineSources' can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided." },
-        Option_0_cannot_be_specified_without_specifying_option_1: { code: 5052, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_without_specifying_option_1_5052", message: "Option '{0}' cannot be specified without specifying option '{1}'." },
-        Option_0_cannot_be_specified_with_option_1: { code: 5053, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_with_option_1_5053", message: "Option '{0}' cannot be specified with option '{1}'." },
-        A_tsconfig_json_file_is_already_defined_at_Colon_0: { code: 5054, category: ts.DiagnosticCategory.Error, key: "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", message: "A 'tsconfig.json' file is already defined at: '{0}'." },
-        Cannot_write_file_0_because_it_would_overwrite_input_file: { code: 5055, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", message: "Cannot write file '{0}' because it would overwrite input file." },
-        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: { code: 5056, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", message: "Cannot write file '{0}' because it would be overwritten by multiple input files." },
-        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'" },
-        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'" },
-        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: { code: 5059, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", message: "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier." },
-        Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
-        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
-        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
-        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
-        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
-        Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
-        Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
-        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: { code: 6003, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", message: "Specify the location where debugger should locate map files instead of generated locations." },
-        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: { code: 6004, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations_6004", message: "Specify the location where debugger should locate TypeScript files instead of source locations." },
-        Watch_input_files: { code: 6005, category: ts.DiagnosticCategory.Message, key: "Watch_input_files_6005", message: "Watch input files." },
-        Redirect_output_structure_to_the_directory: { code: 6006, category: ts.DiagnosticCategory.Message, key: "Redirect_output_structure_to_the_directory_6006", message: "Redirect output structure to the directory." },
-        Do_not_erase_const_enum_declarations_in_generated_code: { code: 6007, category: ts.DiagnosticCategory.Message, key: "Do_not_erase_const_enum_declarations_in_generated_code_6007", message: "Do not erase const enum declarations in generated code." },
-        Do_not_emit_outputs_if_any_errors_were_reported: { code: 6008, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_if_any_errors_were_reported_6008", message: "Do not emit outputs if any errors were reported." },
-        Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
-        Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
-        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
-        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
-        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
-        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
-        Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
-        Print_the_compiler_s_version: { code: 6019, category: ts.DiagnosticCategory.Message, key: "Print_the_compiler_s_version_6019", message: "Print the compiler's version." },
-        Compile_the_project_in_the_given_directory: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_in_the_given_directory_6020", message: "Compile the project in the given directory." },
-        Syntax_Colon_0: { code: 6023, category: ts.DiagnosticCategory.Message, key: "Syntax_Colon_0_6023", message: "Syntax: {0}" },
-        options: { code: 6024, category: ts.DiagnosticCategory.Message, key: "options_6024", message: "options" },
-        file: { code: 6025, category: ts.DiagnosticCategory.Message, key: "file_6025", message: "file" },
-        Examples_Colon_0: { code: 6026, category: ts.DiagnosticCategory.Message, key: "Examples_Colon_0_6026", message: "Examples: {0}" },
-        Options_Colon: { code: 6027, category: ts.DiagnosticCategory.Message, key: "Options_Colon_6027", message: "Options:" },
-        Version_0: { code: 6029, category: ts.DiagnosticCategory.Message, key: "Version_0_6029", message: "Version {0}" },
-        Insert_command_line_options_and_files_from_a_file: { code: 6030, category: ts.DiagnosticCategory.Message, key: "Insert_command_line_options_and_files_from_a_file_6030", message: "Insert command line options and files from a file." },
-        File_change_detected_Starting_incremental_compilation: { code: 6032, category: ts.DiagnosticCategory.Message, key: "File_change_detected_Starting_incremental_compilation_6032", message: "File change detected. Starting incremental compilation..." },
-        KIND: { code: 6034, category: ts.DiagnosticCategory.Message, key: "KIND_6034", message: "KIND" },
-        FILE: { code: 6035, category: ts.DiagnosticCategory.Message, key: "FILE_6035", message: "FILE" },
-        VERSION: { code: 6036, category: ts.DiagnosticCategory.Message, key: "VERSION_6036", message: "VERSION" },
-        LOCATION: { code: 6037, category: ts.DiagnosticCategory.Message, key: "LOCATION_6037", message: "LOCATION" },
-        DIRECTORY: { code: 6038, category: ts.DiagnosticCategory.Message, key: "DIRECTORY_6038", message: "DIRECTORY" },
-        Compilation_complete_Watching_for_file_changes: { code: 6042, category: ts.DiagnosticCategory.Message, key: "Compilation_complete_Watching_for_file_changes_6042", message: "Compilation complete. Watching for file changes." },
-        Generates_corresponding_map_file: { code: 6043, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_map_file_6043", message: "Generates corresponding '.map' file." },
-        Compiler_option_0_expects_an_argument: { code: 6044, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_expects_an_argument_6044", message: "Compiler option '{0}' expects an argument." },
-        Unterminated_quoted_string_in_response_file_0: { code: 6045, category: ts.DiagnosticCategory.Error, key: "Unterminated_quoted_string_in_response_file_0_6045", message: "Unterminated quoted string in response file '{0}'." },
-        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}" },
-        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: { code: 6048, category: ts.DiagnosticCategory.Error, key: "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", message: "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'." },
-        Unsupported_locale_0: { code: 6049, category: ts.DiagnosticCategory.Error, key: "Unsupported_locale_0_6049", message: "Unsupported locale '{0}'." },
-        Unable_to_open_file_0: { code: 6050, category: ts.DiagnosticCategory.Error, key: "Unable_to_open_file_0_6050", message: "Unable to open file '{0}'." },
-        Corrupted_locale_file_0: { code: 6051, category: ts.DiagnosticCategory.Error, key: "Corrupted_locale_file_0_6051", message: "Corrupted locale file {0}." },
-        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: { code: 6052, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_expressions_and_declarations_with_an_implied_any_type_6052", message: "Raise error on expressions and declarations with an implied 'any' type." },
-        File_0_not_found: { code: 6053, category: ts.DiagnosticCategory.Error, key: "File_0_not_found_6053", message: "File '{0}' not found." },
-        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: { code: 6054, category: ts.DiagnosticCategory.Error, key: "File_0_has_unsupported_extension_The_only_supported_extensions_are_1_6054", message: "File '{0}' has unsupported extension. The only supported extensions are {1}." },
-        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: { code: 6055, category: ts.DiagnosticCategory.Message, key: "Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures_6055", message: "Suppress noImplicitAny errors for indexing objects lacking index signatures." },
-        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: { code: 6056, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_declarations_for_code_that_has_an_internal_annotation_6056", message: "Do not emit declarations for code that has an '@internal' annotation." },
-        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: { code: 6058, category: ts.DiagnosticCategory.Message, key: "Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir_6058", message: "Specify the root directory of input files. Use to control the output directory structure with --outDir." },
-        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: { code: 6059, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files_6059", message: "File '{0}' is not under 'rootDir' '{1}'. 'rootDir' is expected to contain all source files." },
-        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: { code: 6060, category: ts.DiagnosticCategory.Message, key: "Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix_6060", message: "Specify the end of line sequence to be used when emitting files: 'CRLF' (dos) or 'LF' (unix)." },
-        NEWLINE: { code: 6061, category: ts.DiagnosticCategory.Message, key: "NEWLINE_6061", message: "NEWLINE" },
-        Option_0_can_only_be_specified_in_tsconfig_json_file: { code: 6064, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_specified_in_tsconfig_json_file_6064", message: "Option '{0}' can only be specified in 'tsconfig.json' file." },
-        Enables_experimental_support_for_ES7_decorators: { code: 6065, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_decorators_6065", message: "Enables experimental support for ES7 decorators." },
-        Enables_experimental_support_for_emitting_type_metadata_for_decorators: { code: 6066, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_emitting_type_metadata_for_decorators_6066", message: "Enables experimental support for emitting type metadata for decorators." },
-        Enables_experimental_support_for_ES7_async_functions: { code: 6068, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_async_functions_6068", message: "Enables experimental support for ES7 async functions." },
-        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: { code: 6069, category: ts.DiagnosticCategory.Message, key: "Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6_6069", message: "Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6)." },
-        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: { code: 6070, category: ts.DiagnosticCategory.Message, key: "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", message: "Initializes a TypeScript project and creates a tsconfig.json file." },
-        Successfully_created_a_tsconfig_json_file: { code: 6071, category: ts.DiagnosticCategory.Message, key: "Successfully_created_a_tsconfig_json_file_6071", message: "Successfully created a tsconfig.json file." },
-        Suppress_excess_property_checks_for_object_literals: { code: 6072, category: ts.DiagnosticCategory.Message, key: "Suppress_excess_property_checks_for_object_literals_6072", message: "Suppress excess property checks for object literals." },
-        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context. (experimental)" },
-        Do_not_report_errors_on_unused_labels: { code: 6074, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unused_labels_6074", message: "Do not report errors on unused labels." },
-        Report_error_when_not_all_code_paths_in_function_return_a_value: { code: 6075, category: ts.DiagnosticCategory.Message, key: "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", message: "Report error when not all code paths in function return a value." },
-        Report_errors_for_fallthrough_cases_in_switch_statement: { code: 6076, category: ts.DiagnosticCategory.Message, key: "Report_errors_for_fallthrough_cases_in_switch_statement_6076", message: "Report errors for fallthrough cases in switch statement." },
-        Do_not_report_errors_on_unreachable_code: { code: 6077, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unreachable_code_6077", message: "Do not report errors on unreachable code." },
-        Disallow_inconsistently_cased_references_to_the_same_file: { code: 6078, category: ts.DiagnosticCategory.Message, key: "Disallow_inconsistently_cased_references_to_the_same_file_6078", message: "Disallow inconsistently-cased references to the same file." },
-        Specify_library_files_to_be_included_in_the_compilation_Colon: { code: 6079, category: ts.DiagnosticCategory.Message, key: "Specify_library_files_to_be_included_in_the_compilation_Colon_6079", message: "Specify library files to be included in the compilation: " },
-        Specify_JSX_code_generation_Colon_preserve_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_or_react_6080", message: "Specify JSX code generation: 'preserve' or 'react'" },
-        Only_amd_and_system_modules_are_supported_alongside_0: { code: 6082, category: ts.DiagnosticCategory.Error, key: "Only_amd_and_system_modules_are_supported_alongside_0_6082", message: "Only 'amd' and 'system' modules are supported alongside --{0}." },
-        Base_directory_to_resolve_non_absolute_module_names: { code: 6083, category: ts.DiagnosticCategory.Message, key: "Base_directory_to_resolve_non_absolute_module_names_6083", message: "Base directory to resolve non-absolute module names." },
-        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084", message: "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit" },
-        Enable_tracing_of_the_name_resolution_process: { code: 6085, category: ts.DiagnosticCategory.Message, key: "Enable_tracing_of_the_name_resolution_process_6085", message: "Enable tracing of the name resolution process." },
-        Resolving_module_0_from_1: { code: 6086, category: ts.DiagnosticCategory.Message, key: "Resolving_module_0_from_1_6086", message: "======== Resolving module '{0}' from '{1}'. ========" },
-        Explicitly_specified_module_resolution_kind_Colon_0: { code: 6087, category: ts.DiagnosticCategory.Message, key: "Explicitly_specified_module_resolution_kind_Colon_0_6087", message: "Explicitly specified module resolution kind: '{0}'." },
-        Module_resolution_kind_is_not_specified_using_0: { code: 6088, category: ts.DiagnosticCategory.Message, key: "Module_resolution_kind_is_not_specified_using_0_6088", message: "Module resolution kind is not specified, using '{0}'." },
-        Module_name_0_was_successfully_resolved_to_1: { code: 6089, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_successfully_resolved_to_1_6089", message: "======== Module name '{0}' was successfully resolved to '{1}'. ========" },
-        Module_name_0_was_not_resolved: { code: 6090, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_not_resolved_6090", message: "======== Module name '{0}' was not resolved. ========" },
-        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: { code: 6091, category: ts.DiagnosticCategory.Message, key: "paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0_6091", message: "'paths' option is specified, looking for a pattern to match module name '{0}'." },
-        Module_name_0_matched_pattern_1: { code: 6092, category: ts.DiagnosticCategory.Message, key: "Module_name_0_matched_pattern_1_6092", message: "Module name '{0}', matched pattern '{1}'." },
-        Trying_substitution_0_candidate_module_location_Colon_1: { code: 6093, category: ts.DiagnosticCategory.Message, key: "Trying_substitution_0_candidate_module_location_Colon_1_6093", message: "Trying substitution '{0}', candidate module location: '{1}'." },
-        Resolving_module_name_0_relative_to_base_url_1_2: { code: 6094, category: ts.DiagnosticCategory.Message, key: "Resolving_module_name_0_relative_to_base_url_1_2_6094", message: "Resolving module name '{0}' relative to base url '{1}' - '{2}'." },
-        Loading_module_as_file_Slash_folder_candidate_module_location_0: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095", message: "Loading module as file / folder, candidate module location '{0}'." },
-        File_0_does_not_exist: { code: 6096, category: ts.DiagnosticCategory.Message, key: "File_0_does_not_exist_6096", message: "File '{0}' does not exist." },
-        File_0_exist_use_it_as_a_name_resolution_result: { code: 6097, category: ts.DiagnosticCategory.Message, key: "File_0_exist_use_it_as_a_name_resolution_result_6097", message: "File '{0}' exist - use it as a name resolution result." },
-        Loading_module_0_from_node_modules_folder: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_6098", message: "Loading module '{0}' from 'node_modules' folder." },
-        Found_package_json_at_0: { code: 6099, category: ts.DiagnosticCategory.Message, key: "Found_package_json_at_0_6099", message: "Found 'package.json' at '{0}'." },
-        package_json_does_not_have_types_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_types_field_6100", message: "'package.json' does not have 'types' field." },
-        package_json_has_0_field_1_that_references_2: { code: 6101, category: ts.DiagnosticCategory.Message, key: "package_json_has_0_field_1_that_references_2_6101", message: "'package.json' has '{0}' field '{1}' that references '{2}'." },
-        Allow_javascript_files_to_be_compiled: { code: 6102, category: ts.DiagnosticCategory.Message, key: "Allow_javascript_files_to_be_compiled_6102", message: "Allow javascript files to be compiled." },
-        Option_0_should_have_array_of_strings_as_a_value: { code: 6103, category: ts.DiagnosticCategory.Error, key: "Option_0_should_have_array_of_strings_as_a_value_6103", message: "Option '{0}' should have array of strings as a value." },
-        Checking_if_0_is_the_longest_matching_prefix_for_1_2: { code: 6104, category: ts.DiagnosticCategory.Message, key: "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", message: "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'." },
-        Expected_type_of_0_field_in_package_json_to_be_string_got_1: { code: 6105, category: ts.DiagnosticCategory.Message, key: "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", message: "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'." },
-        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'" },
-        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'" },
-        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'" },
-        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'" },
-        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'" },
-        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed" },
-        Do_not_emit_use_strict_directives_in_module_output: { code: 6112, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_use_strict_directives_in_module_output_6112", message: "Do not emit 'use strict' directives in module output." },
-        Enable_strict_null_checks: { code: 6113, category: ts.DiagnosticCategory.Message, key: "Enable_strict_null_checks_6113", message: "Enable strict null checks." },
-        Unknown_option_excludes_Did_you_mean_exclude: { code: 6114, category: ts.DiagnosticCategory.Error, key: "Unknown_option_excludes_Did_you_mean_exclude_6114", message: "Unknown option 'excludes'. Did you mean 'exclude'?" },
-        Raise_error_on_this_expressions_with_an_implied_any_type: { code: 6115, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_this_expressions_with_an_implied_any_type_6115", message: "Raise error on 'this' expressions with an implied 'any' type." },
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: { code: 6116, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_2_6116", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory '{2}'. ========" },
-        Resolving_using_primary_search_paths: { code: 6117, category: ts.DiagnosticCategory.Message, key: "Resolving_using_primary_search_paths_6117", message: "Resolving using primary search paths..." },
-        Resolving_from_node_modules_folder: { code: 6118, category: ts.DiagnosticCategory.Message, key: "Resolving_from_node_modules_folder_6118", message: "Resolving from node_modules folder..." },
-        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: { code: 6119, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", message: "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========" },
-        Type_reference_directive_0_was_not_resolved: { code: 6120, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_not_resolved_6120", message: "======== Type reference directive '{0}' was not resolved. ========" },
-        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'" },
-        Root_directory_cannot_be_determined_skipping_primary_search_paths: { code: 6122, category: ts.DiagnosticCategory.Message, key: "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", message: "Root directory cannot be determined, skipping primary search paths." },
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: { code: 6123, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========" },
-        Type_declaration_files_to_be_included_in_compilation: { code: 6124, category: ts.DiagnosticCategory.Message, key: "Type_declaration_files_to_be_included_in_compilation_6124", message: "Type declaration files to be included in compilation." },
-        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'" },
-        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: { code: 6126, category: ts.DiagnosticCategory.Message, key: "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", message: "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder." },
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: { code: 6127, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", message: "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========" },
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
-        The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
-        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
-        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
-        Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
-        Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
-        Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
-        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: { code: 7009, category: ts.DiagnosticCategory.Error, key: "new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type_7009", message: "'new' expression, whose target lacks a construct signature, implicitly has an 'any' type." },
-        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: { code: 7010, category: ts.DiagnosticCategory.Error, key: "_0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type_7010", message: "'{0}', which lacks return-type annotation, implicitly has an '{1}' return type." },
-        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: { code: 7011, category: ts.DiagnosticCategory.Error, key: "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", message: "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type." },
-        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7013, category: ts.DiagnosticCategory.Error, key: "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", message: "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type." },
-        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: { code: 7015, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", message: "Element implicitly has an 'any' type because index expression is not of type 'number'." },
-        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation: { code: 7016, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation_7016", message: "Property '{0}' implicitly has type 'any', because its 'set' accessor lacks a type annotation." },
-        Index_signature_of_object_type_implicitly_has_an_any_type: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Index_signature_of_object_type_implicitly_has_an_any_type_7017", message: "Index signature of object type implicitly has an 'any' type." },
-        Object_literal_s_property_0_implicitly_has_an_1_type: { code: 7018, category: ts.DiagnosticCategory.Error, key: "Object_literal_s_property_0_implicitly_has_an_1_type_7018", message: "Object literal's property '{0}' implicitly has an '{1}' type." },
-        Rest_parameter_0_implicitly_has_an_any_type: { code: 7019, category: ts.DiagnosticCategory.Error, key: "Rest_parameter_0_implicitly_has_an_any_type_7019", message: "Rest parameter '{0}' implicitly has an 'any[]' type." },
-        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7020, category: ts.DiagnosticCategory.Error, key: "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", message: "Call signature, which lacks return-type annotation, implicitly has an 'any' return type." },
-        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: { code: 7022, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or__7022", message: "'{0}' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer." },
-        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7023, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", message: "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
-        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7024, category: ts.DiagnosticCategory.Error, key: "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", message: "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
-        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: { code: 7025, category: ts.DiagnosticCategory.Error, key: "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", message: "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type." },
-        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists" },
-        Unreachable_code_detected: { code: 7027, category: ts.DiagnosticCategory.Error, key: "Unreachable_code_detected_7027", message: "Unreachable code detected." },
-        Unused_label: { code: 7028, category: ts.DiagnosticCategory.Error, key: "Unused_label_7028", message: "Unused label." },
-        Fallthrough_case_in_switch: { code: 7029, category: ts.DiagnosticCategory.Error, key: "Fallthrough_case_in_switch_7029", message: "Fallthrough case in switch." },
-        Not_all_code_paths_return_a_value: { code: 7030, category: ts.DiagnosticCategory.Error, key: "Not_all_code_paths_return_a_value_7030", message: "Not all code paths return a value." },
-        Binding_element_0_implicitly_has_an_1_type: { code: 7031, category: ts.DiagnosticCategory.Error, key: "Binding_element_0_implicitly_has_an_1_type_7031", message: "Binding element '{0}' implicitly has an '{1}' type." },
-        You_cannot_rename_this_element: { code: 8000, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_this_element_8000", message: "You cannot rename this element." },
-        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: { code: 8001, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", message: "You cannot rename elements that are defined in the standard TypeScript library." },
-        import_can_only_be_used_in_a_ts_file: { code: 8002, category: ts.DiagnosticCategory.Error, key: "import_can_only_be_used_in_a_ts_file_8002", message: "'import ... =' can only be used in a .ts file." },
-        export_can_only_be_used_in_a_ts_file: { code: 8003, category: ts.DiagnosticCategory.Error, key: "export_can_only_be_used_in_a_ts_file_8003", message: "'export=' can only be used in a .ts file." },
-        type_parameter_declarations_can_only_be_used_in_a_ts_file: { code: 8004, category: ts.DiagnosticCategory.Error, key: "type_parameter_declarations_can_only_be_used_in_a_ts_file_8004", message: "'type parameter declarations' can only be used in a .ts file." },
-        implements_clauses_can_only_be_used_in_a_ts_file: { code: 8005, category: ts.DiagnosticCategory.Error, key: "implements_clauses_can_only_be_used_in_a_ts_file_8005", message: "'implements clauses' can only be used in a .ts file." },
-        interface_declarations_can_only_be_used_in_a_ts_file: { code: 8006, category: ts.DiagnosticCategory.Error, key: "interface_declarations_can_only_be_used_in_a_ts_file_8006", message: "'interface declarations' can only be used in a .ts file." },
-        module_declarations_can_only_be_used_in_a_ts_file: { code: 8007, category: ts.DiagnosticCategory.Error, key: "module_declarations_can_only_be_used_in_a_ts_file_8007", message: "'module declarations' can only be used in a .ts file." },
-        type_aliases_can_only_be_used_in_a_ts_file: { code: 8008, category: ts.DiagnosticCategory.Error, key: "type_aliases_can_only_be_used_in_a_ts_file_8008", message: "'type aliases' can only be used in a .ts file." },
-        _0_can_only_be_used_in_a_ts_file: { code: 8009, category: ts.DiagnosticCategory.Error, key: "_0_can_only_be_used_in_a_ts_file_8009", message: "'{0}' can only be used in a .ts file." },
-        types_can_only_be_used_in_a_ts_file: { code: 8010, category: ts.DiagnosticCategory.Error, key: "types_can_only_be_used_in_a_ts_file_8010", message: "'types' can only be used in a .ts file." },
-        type_arguments_can_only_be_used_in_a_ts_file: { code: 8011, category: ts.DiagnosticCategory.Error, key: "type_arguments_can_only_be_used_in_a_ts_file_8011", message: "'type arguments' can only be used in a .ts file." },
-        parameter_modifiers_can_only_be_used_in_a_ts_file: { code: 8012, category: ts.DiagnosticCategory.Error, key: "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", message: "'parameter modifiers' can only be used in a .ts file." },
-        property_declarations_can_only_be_used_in_a_ts_file: { code: 8014, category: ts.DiagnosticCategory.Error, key: "property_declarations_can_only_be_used_in_a_ts_file_8014", message: "'property declarations' can only be used in a .ts file." },
-        enum_declarations_can_only_be_used_in_a_ts_file: { code: 8015, category: ts.DiagnosticCategory.Error, key: "enum_declarations_can_only_be_used_in_a_ts_file_8015", message: "'enum declarations' can only be used in a .ts file." },
-        type_assertion_expressions_can_only_be_used_in_a_ts_file: { code: 8016, category: ts.DiagnosticCategory.Error, key: "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", message: "'type assertion expressions' can only be used in a .ts file." },
-        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses." },
-        class_expressions_are_not_currently_supported: { code: 9003, category: ts.DiagnosticCategory.Error, key: "class_expressions_are_not_currently_supported_9003", message: "'class' expressions are not currently supported." },
-        JSX_attributes_must_only_be_assigned_a_non_empty_expression: { code: 17000, category: ts.DiagnosticCategory.Error, key: "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", message: "JSX attributes must only be assigned a non-empty 'expression'." },
-        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: { code: 17001, category: ts.DiagnosticCategory.Error, key: "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", message: "JSX elements cannot have multiple attributes with the same name." },
-        Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: ts.DiagnosticCategory.Error, key: "Expected_corresponding_JSX_closing_tag_for_0_17002", message: "Expected corresponding JSX closing tag for '{0}'." },
-        JSX_attribute_expected: { code: 17003, category: ts.DiagnosticCategory.Error, key: "JSX_attribute_expected_17003", message: "JSX attribute expected." },
-        Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: ts.DiagnosticCategory.Error, key: "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", message: "Cannot use JSX unless the '--jsx' flag is provided." },
-        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'" },
-        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17006, category: ts.DiagnosticCategory.Error, key: "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", message: "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
-        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17007, category: ts.DiagnosticCategory.Error, key: "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", message: "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
-        JSX_element_0_has_no_corresponding_closing_tag: { code: 17008, category: ts.DiagnosticCategory.Error, key: "JSX_element_0_has_no_corresponding_closing_tag_17008", message: "JSX element '{0}' has no corresponding closing tag." },
-        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: { code: 17009, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", message: "'super' must be called before accessing 'this' in the constructor of a derived class." },
-        Unknown_typing_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_typing_option_0_17010", message: "Unknown typing option '{0}'." }
-    };
-})(ts || (ts = {}));
-var ts;
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11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    function lookupInUnicodeMap(code, map) {
-        if (code < map[0]) {
-            return false;
-        }
-        var lo = 0;
-        var hi = map.length;
-        var mid;
-        while (lo + 1 < hi) {
-            mid = lo + (hi - lo) / 2;
-            mid -= mid % 2;
-            if (map[mid] <= code && code <= map[mid + 1]) {
-                return true;
-            }
-            if (code < map[mid]) {
-                hi = mid;
-            }
-            else {
-                lo = mid + 2;
-            }
-        }
-        return false;
-    }
-    function isUnicodeIdentifierStart(code, languageVersion) {
-        return languageVersion >= 1 ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
-    }
-    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
-    function isUnicodeIdentifierPart(code, languageVersion) {
-        return languageVersion >= 1 ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
-    }
-    function makeReverseMap(source) {
-        var result = [];
-        for (var name_4 in source) {
-            if (source.hasOwnProperty(name_4)) {
-                result[source[name_4]] = name_4;
-            }
-        }
-        return result;
-    }
-    var tokenStrings = makeReverseMap(textToToken);
-    function tokenToString(t) {
-        return tokenStrings[t];
-    }
-    ts.tokenToString = tokenToString;
-    function stringToToken(s) {
-        return textToToken[s];
-    }
-    ts.stringToToken = stringToToken;
-    function computeLineStarts(text) {
-        var result = new Array();
-        var pos = 0;
-        var lineStart = 0;
-        while (pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 13:
-                    if (text.charCodeAt(pos) === 10) {
-                        pos++;
-                    }
-                case 10:
-                    result.push(lineStart);
-                    lineStart = pos;
-                    break;
-                default:
-                    if (ch > 127 && isLineBreak(ch)) {
-                        result.push(lineStart);
-                        lineStart = pos;
-                    }
-                    break;
-            }
-        }
-        result.push(lineStart);
-        return result;
-    }
-    ts.computeLineStarts = computeLineStarts;
-    function getPositionOfLineAndCharacter(sourceFile, line, character) {
-        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
-    }
-    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
-    function computePositionOfLineAndCharacter(lineStarts, line, character) {
-        ts.Debug.assert(line >= 0 && line < lineStarts.length);
-        return lineStarts[line] + character;
-    }
-    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
-    function getLineStarts(sourceFile) {
-        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
-    }
-    ts.getLineStarts = getLineStarts;
-    function computeLineAndCharacterOfPosition(lineStarts, position) {
-        var lineNumber = ts.binarySearch(lineStarts, position);
-        if (lineNumber < 0) {
-            lineNumber = ~lineNumber - 1;
-            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
-        }
-        return {
-            line: lineNumber,
-            character: position - lineStarts[lineNumber]
-        };
-    }
-    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
-    function getLineAndCharacterOfPosition(sourceFile, position) {
-        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
-    }
-    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-    function isWhiteSpace(ch) {
-        return ch === 32 ||
-            ch === 9 ||
-            ch === 11 ||
-            ch === 12 ||
-            ch === 160 ||
-            ch === 133 ||
-            ch === 5760 ||
-            ch >= 8192 && ch <= 8203 ||
-            ch === 8239 ||
-            ch === 8287 ||
-            ch === 12288 ||
-            ch === 65279;
-    }
-    ts.isWhiteSpace = isWhiteSpace;
-    function isLineBreak(ch) {
-        return ch === 10 ||
-            ch === 13 ||
-            ch === 8232 ||
-            ch === 8233;
-    }
-    ts.isLineBreak = isLineBreak;
-    function isDigit(ch) {
-        return ch >= 48 && ch <= 57;
-    }
-    function isOctalDigit(ch) {
-        return ch >= 48 && ch <= 55;
-    }
-    ts.isOctalDigit = isOctalDigit;
-    function couldStartTrivia(text, pos) {
-        var ch = text.charCodeAt(pos);
-        switch (ch) {
-            case 13:
-            case 10:
-            case 9:
-            case 11:
-            case 12:
-            case 32:
-            case 47:
-            case 60:
-            case 61:
-            case 62:
-                return true;
-            case 35:
-                return pos === 0;
-            default:
-                return ch > 127;
-        }
-    }
-    ts.couldStartTrivia = couldStartTrivia;
-    function skipTrivia(text, pos, stopAfterLineBreak) {
-        if (!(pos >= 0)) {
-            return pos;
-        }
-        while (true) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13:
-                    if (text.charCodeAt(pos + 1) === 10) {
-                        pos++;
-                    }
-                case 10:
-                    pos++;
-                    if (stopAfterLineBreak) {
-                        return pos;
-                    }
-                    continue;
-                case 9:
-                case 11:
-                case 12:
-                case 32:
-                    pos++;
-                    continue;
-                case 47:
-                    if (text.charCodeAt(pos + 1) === 47) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (isLineBreak(text.charCodeAt(pos))) {
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    if (text.charCodeAt(pos + 1) === 42) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
-                                pos += 2;
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    break;
-                case 60:
-                case 61:
-                case 62:
-                    if (isConflictMarkerTrivia(text, pos)) {
-                        pos = scanConflictMarkerTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                case 35:
-                    if (pos === 0 && isShebangTrivia(text, pos)) {
-                        pos = scanShebangTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                default:
-                    if (ch > 127 && (isWhiteSpace(ch) || isLineBreak(ch))) {
-                        pos++;
-                        continue;
-                    }
-                    break;
-            }
-            return pos;
-        }
-    }
-    ts.skipTrivia = skipTrivia;
-    var mergeConflictMarkerLength = "<<<<<<<".length;
-    function isConflictMarkerTrivia(text, pos) {
-        ts.Debug.assert(pos >= 0);
-        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
-            var ch = text.charCodeAt(pos);
-            if ((pos + mergeConflictMarkerLength) < text.length) {
-                for (var i = 0, n = mergeConflictMarkerLength; i < n; i++) {
-                    if (text.charCodeAt(pos + i) !== ch) {
-                        return false;
-                    }
-                }
-                return ch === 61 ||
-                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32;
-            }
-        }
-        return false;
-    }
-    function scanConflictMarkerTrivia(text, pos, error) {
-        if (error) {
-            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
-        }
-        var ch = text.charCodeAt(pos);
-        var len = text.length;
-        if (ch === 60 || ch === 62) {
-            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
-                pos++;
-            }
-        }
-        else {
-            ts.Debug.assert(ch === 61);
-            while (pos < len) {
-                var ch_1 = text.charCodeAt(pos);
-                if (ch_1 === 62 && isConflictMarkerTrivia(text, pos)) {
-                    break;
-                }
-                pos++;
-            }
-        }
-        return pos;
-    }
-    var shebangTriviaRegex = /^#!.*/;
-    function isShebangTrivia(text, pos) {
-        ts.Debug.assert(pos === 0);
-        return shebangTriviaRegex.test(text);
-    }
-    function scanShebangTrivia(text, pos) {
-        var shebang = shebangTriviaRegex.exec(text)[0];
-        pos = pos + shebang.length;
-        return pos;
-    }
-    function getCommentRanges(text, pos, trailing) {
-        var result;
-        var collecting = trailing || pos === 0;
-        while (pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13:
-                    if (text.charCodeAt(pos + 1) === 10) {
-                        pos++;
-                    }
-                case 10:
-                    pos++;
-                    if (trailing) {
-                        return result;
-                    }
-                    collecting = true;
-                    if (result && result.length) {
-                        ts.lastOrUndefined(result).hasTrailingNewLine = true;
-                    }
-                    continue;
-                case 9:
-                case 11:
-                case 12:
-                case 32:
-                    pos++;
-                    continue;
-                case 47:
-                    var nextChar = text.charCodeAt(pos + 1);
-                    var hasTrailingNewLine = false;
-                    if (nextChar === 47 || nextChar === 42) {
-                        var kind = nextChar === 47 ? 2 : 3;
-                        var startPos = pos;
-                        pos += 2;
-                        if (nextChar === 47) {
-                            while (pos < text.length) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    hasTrailingNewLine = true;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        else {
-                            while (pos < text.length) {
-                                if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
-                                    pos += 2;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        if (collecting) {
-                            if (!result) {
-                                result = [];
-                            }
-                            result.push({ pos: startPos, end: pos, hasTrailingNewLine: hasTrailingNewLine, kind: kind });
-                        }
-                        continue;
-                    }
-                    break;
-                default:
-                    if (ch > 127 && (isWhiteSpace(ch) || isLineBreak(ch))) {
-                        if (result && result.length && isLineBreak(ch)) {
-                            ts.lastOrUndefined(result).hasTrailingNewLine = true;
-                        }
-                        pos++;
-                        continue;
-                    }
-                    break;
-            }
-            return result;
-        }
-        return result;
-    }
-    function getLeadingCommentRanges(text, pos) {
-        return getCommentRanges(text, pos, false);
-    }
-    ts.getLeadingCommentRanges = getLeadingCommentRanges;
-    function getTrailingCommentRanges(text, pos) {
-        return getCommentRanges(text, pos, true);
-    }
-    ts.getTrailingCommentRanges = getTrailingCommentRanges;
-    function getShebang(text) {
-        return shebangTriviaRegex.test(text)
-            ? shebangTriviaRegex.exec(text)[0]
-            : undefined;
-    }
-    ts.getShebang = getShebang;
-    function isIdentifierStart(ch, languageVersion) {
-        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
-            ch === 36 || ch === 95 ||
-            ch > 127 && isUnicodeIdentifierStart(ch, languageVersion);
-    }
-    ts.isIdentifierStart = isIdentifierStart;
-    function isIdentifierPart(ch, languageVersion) {
-        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
-            ch >= 48 && ch <= 57 || ch === 36 || ch === 95 ||
-            ch > 127 && isUnicodeIdentifierPart(ch, languageVersion);
-    }
-    ts.isIdentifierPart = isIdentifierPart;
-    function isIdentifier(name, languageVersion) {
-        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
-            return false;
-        }
-        for (var i = 1, n = name.length; i < n; i++) {
-            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.isIdentifier = isIdentifier;
-    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
-        if (languageVariant === void 0) { languageVariant = 0; }
-        var pos;
-        var end;
-        var startPos;
-        var tokenPos;
-        var token;
-        var tokenValue;
-        var precedingLineBreak;
-        var hasExtendedUnicodeEscape;
-        var tokenIsUnterminated;
-        setText(text, start, length);
-        return {
-            getStartPos: function () { return startPos; },
-            getTextPos: function () { return pos; },
-            getToken: function () { return token; },
-            getTokenPos: function () { return tokenPos; },
-            getTokenText: function () { return text.substring(tokenPos, pos); },
-            getTokenValue: function () { return tokenValue; },
-            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
-            hasPrecedingLineBreak: function () { return precedingLineBreak; },
-            isIdentifier: function () { return token === 69 || token > 105; },
-            isReservedWord: function () { return token >= 70 && token <= 105; },
-            isUnterminated: function () { return tokenIsUnterminated; },
-            reScanGreaterToken: reScanGreaterToken,
-            reScanSlashToken: reScanSlashToken,
-            reScanTemplateToken: reScanTemplateToken,
-            scanJsxIdentifier: scanJsxIdentifier,
-            reScanJsxToken: reScanJsxToken,
-            scanJsxToken: scanJsxToken,
-            scanJSDocToken: scanJSDocToken,
-            scan: scan,
-            setText: setText,
-            setScriptTarget: setScriptTarget,
-            setLanguageVariant: setLanguageVariant,
-            setOnError: setOnError,
-            setTextPos: setTextPos,
-            tryScan: tryScan,
-            lookAhead: lookAhead,
-            scanRange: scanRange
-        };
-        function error(message, length) {
-            if (onError) {
-                onError(message, length || 0);
-            }
-        }
-        function scanNumber() {
-            var start = pos;
-            while (isDigit(text.charCodeAt(pos)))
-                pos++;
-            if (text.charCodeAt(pos) === 46) {
-                pos++;
-                while (isDigit(text.charCodeAt(pos)))
-                    pos++;
-            }
-            var end = pos;
-            if (text.charCodeAt(pos) === 69 || text.charCodeAt(pos) === 101) {
-                pos++;
-                if (text.charCodeAt(pos) === 43 || text.charCodeAt(pos) === 45)
-                    pos++;
-                if (isDigit(text.charCodeAt(pos))) {
-                    pos++;
-                    while (isDigit(text.charCodeAt(pos)))
-                        pos++;
-                    end = pos;
-                }
-                else {
-                    error(ts.Diagnostics.Digit_expected);
-                }
-            }
-            return "" + +(text.substring(start, end));
-        }
-        function scanOctalDigits() {
-            var start = pos;
-            while (isOctalDigit(text.charCodeAt(pos))) {
-                pos++;
-            }
-            return +(text.substring(start, pos));
-        }
-        function scanExactNumberOfHexDigits(count) {
-            return scanHexDigits(count, false);
-        }
-        function scanMinimumNumberOfHexDigits(count) {
-            return scanHexDigits(count, true);
-        }
-        function scanHexDigits(minCount, scanAsManyAsPossible) {
-            var digits = 0;
-            var value = 0;
-            while (digits < minCount || scanAsManyAsPossible) {
-                var ch = text.charCodeAt(pos);
-                if (ch >= 48 && ch <= 57) {
-                    value = value * 16 + ch - 48;
-                }
-                else if (ch >= 65 && ch <= 70) {
-                    value = value * 16 + ch - 65 + 10;
-                }
-                else if (ch >= 97 && ch <= 102) {
-                    value = value * 16 + ch - 97 + 10;
-                }
-                else {
-                    break;
-                }
-                pos++;
-                digits++;
-            }
-            if (digits < minCount) {
-                value = -1;
-            }
-            return value;
-        }
-        function scanString() {
-            var quote = text.charCodeAt(pos);
-            pos++;
-            var result = "";
-            var start = pos;
-            while (true) {
-                if (pos >= end) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
-                }
-                var ch = text.charCodeAt(pos);
-                if (ch === quote) {
-                    result += text.substring(start, pos);
-                    pos++;
-                    break;
-                }
-                if (ch === 92) {
-                    result += text.substring(start, pos);
-                    result += scanEscapeSequence();
-                    start = pos;
-                    continue;
-                }
-                if (isLineBreak(ch)) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
-                }
-                pos++;
-            }
-            return result;
-        }
-        function scanTemplateAndSetTokenValue() {
-            var startedWithBacktick = text.charCodeAt(pos) === 96;
-            pos++;
-            var start = pos;
-            var contents = "";
-            var resultingToken;
-            while (true) {
-                if (pos >= end) {
-                    contents += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_template_literal);
-                    resultingToken = startedWithBacktick ? 11 : 14;
-                    break;
-                }
-                var currChar = text.charCodeAt(pos);
-                if (currChar === 96) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    resultingToken = startedWithBacktick ? 11 : 14;
-                    break;
-                }
-                if (currChar === 36 && pos + 1 < end && text.charCodeAt(pos + 1) === 123) {
-                    contents += text.substring(start, pos);
-                    pos += 2;
-                    resultingToken = startedWithBacktick ? 12 : 13;
-                    break;
-                }
-                if (currChar === 92) {
-                    contents += text.substring(start, pos);
-                    contents += scanEscapeSequence();
-                    start = pos;
-                    continue;
-                }
-                if (currChar === 13) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    if (pos < end && text.charCodeAt(pos) === 10) {
-                        pos++;
-                    }
-                    contents += "\n";
-                    start = pos;
-                    continue;
-                }
-                pos++;
-            }
-            ts.Debug.assert(resultingToken !== undefined);
-            tokenValue = contents;
-            return resultingToken;
-        }
-        function scanEscapeSequence() {
-            pos++;
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                return "";
-            }
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 48:
-                    return "\0";
-                case 98:
-                    return "\b";
-                case 116:
-                    return "\t";
-                case 110:
-                    return "\n";
-                case 118:
-                    return "\v";
-                case 102:
-                    return "\f";
-                case 114:
-                    return "\r";
-                case 39:
-                    return "\'";
-                case 34:
-                    return "\"";
-                case 117:
-                    if (pos < end && text.charCodeAt(pos) === 123) {
-                        hasExtendedUnicodeEscape = true;
-                        pos++;
-                        return scanExtendedUnicodeEscape();
-                    }
-                    return scanHexadecimalEscape(4);
-                case 120:
-                    return scanHexadecimalEscape(2);
-                case 13:
-                    if (pos < end && text.charCodeAt(pos) === 10) {
-                        pos++;
-                    }
-                case 10:
-                case 8232:
-                case 8233:
-                    return "";
-                default:
-                    return String.fromCharCode(ch);
-            }
-        }
-        function scanHexadecimalEscape(numDigits) {
-            var escapedValue = scanExactNumberOfHexDigits(numDigits);
-            if (escapedValue >= 0) {
-                return String.fromCharCode(escapedValue);
-            }
-            else {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                return "";
-            }
-        }
-        function scanExtendedUnicodeEscape() {
-            var escapedValue = scanMinimumNumberOfHexDigits(1);
-            var isInvalidExtendedEscape = false;
-            if (escapedValue < 0) {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                isInvalidExtendedEscape = true;
-            }
-            else if (escapedValue > 0x10FFFF) {
-                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
-                isInvalidExtendedEscape = true;
-            }
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                isInvalidExtendedEscape = true;
-            }
-            else if (text.charCodeAt(pos) === 125) {
-                pos++;
-            }
-            else {
-                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
-                isInvalidExtendedEscape = true;
-            }
-            if (isInvalidExtendedEscape) {
-                return "";
-            }
-            return utf16EncodeAsString(escapedValue);
-        }
-        function utf16EncodeAsString(codePoint) {
-            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
-            if (codePoint <= 65535) {
-                return String.fromCharCode(codePoint);
-            }
-            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
-            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
-            return String.fromCharCode(codeUnit1, codeUnit2);
-        }
-        function peekUnicodeEscape() {
-            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117) {
-                var start_1 = pos;
-                pos += 2;
-                var value = scanExactNumberOfHexDigits(4);
-                pos = start_1;
-                return value;
-            }
-            return -1;
-        }
-        function scanIdentifierParts() {
-            var result = "";
-            var start = pos;
-            while (pos < end) {
-                var ch = text.charCodeAt(pos);
-                if (isIdentifierPart(ch, languageVersion)) {
-                    pos++;
-                }
-                else if (ch === 92) {
-                    ch = peekUnicodeEscape();
-                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
-                        break;
-                    }
-                    result += text.substring(start, pos);
-                    result += String.fromCharCode(ch);
-                    pos += 6;
-                    start = pos;
-                }
-                else {
-                    break;
-                }
-            }
-            result += text.substring(start, pos);
-            return result;
-        }
-        function getIdentifierToken() {
-            var len = tokenValue.length;
-            if (len >= 2 && len <= 11) {
-                var ch = tokenValue.charCodeAt(0);
-                if (ch >= 97 && ch <= 122 && hasOwnProperty.call(textToToken, tokenValue)) {
-                    return token = textToToken[tokenValue];
-                }
-            }
-            return token = 69;
-        }
-        function scanBinaryOrOctalDigits(base) {
-            ts.Debug.assert(base !== 2 || base !== 8, "Expected either base 2 or base 8");
-            var value = 0;
-            var numberOfDigits = 0;
-            while (true) {
-                var ch = text.charCodeAt(pos);
-                var valueOfCh = ch - 48;
-                if (!isDigit(ch) || valueOfCh >= base) {
-                    break;
-                }
-                value = value * base + valueOfCh;
-                pos++;
-                numberOfDigits++;
-            }
-            if (numberOfDigits === 0) {
-                return -1;
-            }
-            return value;
-        }
-        function scan() {
-            startPos = pos;
-            hasExtendedUnicodeEscape = false;
-            precedingLineBreak = false;
-            tokenIsUnterminated = false;
-            while (true) {
-                tokenPos = pos;
-                if (pos >= end) {
-                    return token = 1;
-                }
-                var ch = text.charCodeAt(pos);
-                if (ch === 35 && pos === 0 && isShebangTrivia(text, pos)) {
-                    pos = scanShebangTrivia(text, pos);
-                    if (skipTrivia) {
-                        continue;
-                    }
-                    else {
-                        return token = 6;
-                    }
-                }
-                switch (ch) {
-                    case 10:
-                    case 13:
-                        precedingLineBreak = true;
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            if (ch === 13 && pos + 1 < end && text.charCodeAt(pos + 1) === 10) {
-                                pos += 2;
-                            }
-                            else {
-                                pos++;
-                            }
-                            return token = 4;
-                        }
-                    case 9:
-                    case 11:
-                    case 12:
-                    case 32:
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            while (pos < end && isWhiteSpace(text.charCodeAt(pos))) {
-                                pos++;
-                            }
-                            return token = 5;
-                        }
-                    case 33:
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            if (text.charCodeAt(pos + 2) === 61) {
-                                return pos += 3, token = 33;
-                            }
-                            return pos += 2, token = 31;
-                        }
-                        pos++;
-                        return token = 49;
-                    case 34:
-                    case 39:
-                        tokenValue = scanString();
-                        return token = 9;
-                    case 96:
-                        return token = scanTemplateAndSetTokenValue();
-                    case 37:
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 62;
-                        }
-                        pos++;
-                        return token = 40;
-                    case 38:
-                        if (text.charCodeAt(pos + 1) === 38) {
-                            return pos += 2, token = 51;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 66;
-                        }
-                        pos++;
-                        return token = 46;
-                    case 40:
-                        pos++;
-                        return token = 17;
-                    case 41:
-                        pos++;
-                        return token = 18;
-                    case 42:
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 59;
-                        }
-                        if (text.charCodeAt(pos + 1) === 42) {
-                            if (text.charCodeAt(pos + 2) === 61) {
-                                return pos += 3, token = 60;
-                            }
-                            return pos += 2, token = 38;
-                        }
-                        pos++;
-                        return token = 37;
-                    case 43:
-                        if (text.charCodeAt(pos + 1) === 43) {
-                            return pos += 2, token = 41;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 57;
-                        }
-                        pos++;
-                        return token = 35;
-                    case 44:
-                        pos++;
-                        return token = 24;
-                    case 45:
-                        if (text.charCodeAt(pos + 1) === 45) {
-                            return pos += 2, token = 42;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 58;
-                        }
-                        pos++;
-                        return token = 36;
-                    case 46:
-                        if (isDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = scanNumber();
-                            return token = 8;
-                        }
-                        if (text.charCodeAt(pos + 1) === 46 && text.charCodeAt(pos + 2) === 46) {
-                            return pos += 3, token = 22;
-                        }
-                        pos++;
-                        return token = 21;
-                    case 47:
-                        if (text.charCodeAt(pos + 1) === 47) {
-                            pos += 2;
-                            while (pos < end) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    break;
-                                }
-                                pos++;
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 2;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 42) {
-                            pos += 2;
-                            var commentClosed = false;
-                            while (pos < end) {
-                                var ch_2 = text.charCodeAt(pos);
-                                if (ch_2 === 42 && text.charCodeAt(pos + 1) === 47) {
-                                    pos += 2;
-                                    commentClosed = true;
-                                    break;
-                                }
-                                if (isLineBreak(ch_2)) {
-                                    precedingLineBreak = true;
-                                }
-                                pos++;
-                            }
-                            if (!commentClosed) {
-                                error(ts.Diagnostics.Asterisk_Slash_expected);
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                tokenIsUnterminated = !commentClosed;
-                                return token = 3;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 61;
-                        }
-                        pos++;
-                        return token = 39;
-                    case 48:
-                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 || text.charCodeAt(pos + 1) === 120)) {
-                            pos += 2;
-                            var value = scanMinimumNumberOfHexDigits(1);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 || text.charCodeAt(pos + 1) === 98)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(2);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Binary_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 || text.charCodeAt(pos + 1) === 111)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(8);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Octal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8;
-                        }
-                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = "" + scanOctalDigits();
-                            return token = 8;
-                        }
-                    case 49:
-                    case 50:
-                    case 51:
-                    case 52:
-                    case 53:
-                    case 54:
-                    case 55:
-                    case 56:
-                    case 57:
-                        tokenValue = scanNumber();
-                        return token = 8;
-                    case 58:
-                        pos++;
-                        return token = 54;
-                    case 59:
-                        pos++;
-                        return token = 23;
-                    case 60:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 60) {
-                            if (text.charCodeAt(pos + 2) === 61) {
-                                return pos += 3, token = 63;
-                            }
-                            return pos += 2, token = 43;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 28;
-                        }
-                        if (languageVariant === 1 &&
-                            text.charCodeAt(pos + 1) === 47 &&
-                            text.charCodeAt(pos + 2) !== 42) {
-                            return pos += 2, token = 26;
-                        }
-                        pos++;
-                        return token = 25;
-                    case 61:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            if (text.charCodeAt(pos + 2) === 61) {
-                                return pos += 3, token = 32;
-                            }
-                            return pos += 2, token = 30;
-                        }
-                        if (text.charCodeAt(pos + 1) === 62) {
-                            return pos += 2, token = 34;
-                        }
-                        pos++;
-                        return token = 56;
-                    case 62:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7;
-                            }
-                        }
-                        pos++;
-                        return token = 27;
-                    case 63:
-                        pos++;
-                        return token = 53;
-                    case 91:
-                        pos++;
-                        return token = 19;
-                    case 93:
-                        pos++;
-                        return token = 20;
-                    case 94:
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 68;
-                        }
-                        pos++;
-                        return token = 48;
-                    case 123:
-                        pos++;
-                        return token = 15;
-                    case 124:
-                        if (text.charCodeAt(pos + 1) === 124) {
-                            return pos += 2, token = 52;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 67;
-                        }
-                        pos++;
-                        return token = 47;
-                    case 125:
-                        pos++;
-                        return token = 16;
-                    case 126:
-                        pos++;
-                        return token = 50;
-                    case 64:
-                        pos++;
-                        return token = 55;
-                    case 92:
-                        var cookedChar = peekUnicodeEscape();
-                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
-                            pos += 6;
-                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
-                            return token = getIdentifierToken();
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0;
-                    default:
-                        if (isIdentifierStart(ch, languageVersion)) {
-                            pos++;
-                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
-                                pos++;
-                            tokenValue = text.substring(tokenPos, pos);
-                            if (ch === 92) {
-                                tokenValue += scanIdentifierParts();
-                            }
-                            return token = getIdentifierToken();
-                        }
-                        else if (isWhiteSpace(ch)) {
-                            pos++;
-                            continue;
-                        }
-                        else if (isLineBreak(ch)) {
-                            precedingLineBreak = true;
-                            pos++;
-                            continue;
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0;
-                }
-            }
-        }
-        function reScanGreaterToken() {
-            if (token === 27) {
-                if (text.charCodeAt(pos) === 62) {
-                    if (text.charCodeAt(pos + 1) === 62) {
-                        if (text.charCodeAt(pos + 2) === 61) {
-                            return pos += 3, token = 65;
-                        }
-                        return pos += 2, token = 45;
-                    }
-                    if (text.charCodeAt(pos + 1) === 61) {
-                        return pos += 2, token = 64;
-                    }
-                    pos++;
-                    return token = 44;
-                }
-                if (text.charCodeAt(pos) === 61) {
-                    pos++;
-                    return token = 29;
-                }
-            }
-            return token;
-        }
-        function reScanSlashToken() {
-            if (token === 39 || token === 61) {
-                var p = tokenPos + 1;
-                var inEscape = false;
-                var inCharacterClass = false;
-                while (true) {
-                    if (p >= end) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    var ch = text.charCodeAt(p);
-                    if (isLineBreak(ch)) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    if (inEscape) {
-                        inEscape = false;
-                    }
-                    else if (ch === 47 && !inCharacterClass) {
-                        p++;
-                        break;
-                    }
-                    else if (ch === 91) {
-                        inCharacterClass = true;
-                    }
-                    else if (ch === 92) {
-                        inEscape = true;
-                    }
-                    else if (ch === 93) {
-                        inCharacterClass = false;
-                    }
-                    p++;
-                }
-                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
-                    p++;
-                }
-                pos = p;
-                tokenValue = text.substring(tokenPos, pos);
-                token = 10;
-            }
-            return token;
-        }
-        function reScanTemplateToken() {
-            ts.Debug.assert(token === 16, "'reScanTemplateToken' should only be called on a '}'");
-            pos = tokenPos;
-            return token = scanTemplateAndSetTokenValue();
-        }
-        function reScanJsxToken() {
-            pos = tokenPos = startPos;
-            return token = scanJsxToken();
-        }
-        function scanJsxToken() {
-            startPos = tokenPos = pos;
-            if (pos >= end) {
-                return token = 1;
-            }
-            var char = text.charCodeAt(pos);
-            if (char === 60) {
-                if (text.charCodeAt(pos + 1) === 47) {
-                    pos += 2;
-                    return token = 26;
-                }
-                pos++;
-                return token = 25;
-            }
-            if (char === 123) {
-                pos++;
-                return token = 15;
-            }
-            while (pos < end) {
-                pos++;
-                char = text.charCodeAt(pos);
-                if ((char === 123) || (char === 60)) {
-                    break;
-                }
-            }
-            return token = 244;
-        }
-        function scanJsxIdentifier() {
-            if (tokenIsIdentifierOrKeyword(token)) {
-                var firstCharPosition = pos;
-                while (pos < end) {
-                    var ch = text.charCodeAt(pos);
-                    if (ch === 45 || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
-                        pos++;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
-            }
-            return token;
-        }
-        function scanJSDocToken() {
-            if (pos >= end) {
-                return token = 1;
-            }
-            startPos = pos;
-            var ch = text.charCodeAt(pos);
-            while (pos < end) {
-                ch = text.charCodeAt(pos);
-                if (isWhiteSpace(ch)) {
-                    pos++;
-                }
-                else {
-                    break;
-                }
-            }
-            tokenPos = pos;
-            switch (ch) {
-                case 64:
-                    return pos += 1, token = 55;
-                case 10:
-                case 13:
-                    return pos += 1, token = 4;
-                case 42:
-                    return pos += 1, token = 37;
-                case 123:
-                    return pos += 1, token = 15;
-                case 125:
-                    return pos += 1, token = 16;
-                case 91:
-                    return pos += 1, token = 19;
-                case 93:
-                    return pos += 1, token = 20;
-                case 61:
-                    return pos += 1, token = 56;
-                case 44:
-                    return pos += 1, token = 24;
-            }
-            if (isIdentifierStart(ch, 2)) {
-                pos++;
-                while (isIdentifierPart(text.charCodeAt(pos), 2) && pos < end) {
-                    pos++;
-                }
-                return token = 69;
-            }
-            else {
-                return pos += 1, token = 0;
-            }
-        }
-        function speculationHelper(callback, isLookahead) {
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var saveTokenValue = tokenValue;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var result = callback();
-            if (!result || isLookahead) {
-                pos = savePos;
-                startPos = saveStartPos;
-                tokenPos = saveTokenPos;
-                token = saveToken;
-                tokenValue = saveTokenValue;
-                precedingLineBreak = savePrecedingLineBreak;
-            }
-            return result;
-        }
-        function scanRange(start, length, callback) {
-            var saveEnd = end;
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var saveTokenValue = tokenValue;
-            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
-            var saveTokenIsUnterminated = tokenIsUnterminated;
-            setText(text, start, length);
-            var result = callback();
-            end = saveEnd;
-            pos = savePos;
-            startPos = saveStartPos;
-            tokenPos = saveTokenPos;
-            token = saveToken;
-            precedingLineBreak = savePrecedingLineBreak;
-            tokenValue = saveTokenValue;
-            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
-            tokenIsUnterminated = saveTokenIsUnterminated;
-            return result;
-        }
-        function lookAhead(callback) {
-            return speculationHelper(callback, true);
-        }
-        function tryScan(callback) {
-            return speculationHelper(callback, false);
-        }
-        function setText(newText, start, length) {
-            text = newText || "";
-            end = length === undefined ? text.length : start + length;
-            setTextPos(start || 0);
-        }
-        function setOnError(errorCallback) {
-            onError = errorCallback;
-        }
-        function setScriptTarget(scriptTarget) {
-            languageVersion = scriptTarget;
-        }
-        function setLanguageVariant(variant) {
-            languageVariant = variant;
-        }
-        function setTextPos(textPos) {
-            ts.Debug.assert(textPos >= 0);
-            pos = textPos;
-            startPos = textPos;
-            tokenPos = textPos;
-            token = 0;
-            precedingLineBreak = false;
-            tokenValue = undefined;
-            hasExtendedUnicodeEscape = false;
-            tokenIsUnterminated = false;
-        }
-    }
-    ts.createScanner = createScanner;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getDeclarationOfKind(symbol, kind) {
-        var declarations = symbol.declarations;
-        if (declarations) {
-            for (var _i = 0, declarations_1 = declarations; _i < declarations_1.length; _i++) {
-                var declaration = declarations_1[_i];
-                if (declaration.kind === kind) {
-                    return declaration;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getDeclarationOfKind = getDeclarationOfKind;
-    var stringWriters = [];
-    function getSingleLineStringWriter() {
-        if (stringWriters.length === 0) {
-            var str_1 = "";
-            var writeText = function (text) { return str_1 += text; };
-            return {
-                string: function () { return str_1; },
-                writeKeyword: writeText,
-                writeOperator: writeText,
-                writePunctuation: writeText,
-                writeSpace: writeText,
-                writeStringLiteral: writeText,
-                writeParameter: writeText,
-                writeSymbol: writeText,
-                writeLine: function () { return str_1 += " "; },
-                increaseIndent: function () { },
-                decreaseIndent: function () { },
-                clear: function () { return str_1 = ""; },
-                trackSymbol: function () { },
-                reportInaccessibleThisError: function () { }
-            };
-        }
-        return stringWriters.pop();
-    }
-    ts.getSingleLineStringWriter = getSingleLineStringWriter;
-    function releaseStringWriter(writer) {
-        writer.clear();
-        stringWriters.push(writer);
-    }
-    ts.releaseStringWriter = releaseStringWriter;
-    function getFullWidth(node) {
-        return node.end - node.pos;
-    }
-    ts.getFullWidth = getFullWidth;
-    function mapIsEqualTo(map1, map2) {
-        if (!map1 || !map2) {
-            return map1 === map2;
-        }
-        return containsAll(map1, map2) && containsAll(map2, map1);
-    }
-    ts.mapIsEqualTo = mapIsEqualTo;
-    function containsAll(map, other) {
-        for (var key in map) {
-            if (!ts.hasProperty(map, key)) {
-                continue;
-            }
-            if (!ts.hasProperty(other, key) || map[key] !== other[key]) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function arrayIsEqualTo(array1, array2, equaler) {
-        if (!array1 || !array2) {
-            return array1 === array2;
-        }
-        if (array1.length !== array2.length) {
-            return false;
-        }
-        for (var i = 0; i < array1.length; i++) {
-            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
-            if (!equals) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.arrayIsEqualTo = arrayIsEqualTo;
-    function hasResolvedModule(sourceFile, moduleNameText) {
-        return sourceFile.resolvedModules && ts.hasProperty(sourceFile.resolvedModules, moduleNameText);
-    }
-    ts.hasResolvedModule = hasResolvedModule;
-    function getResolvedModule(sourceFile, moduleNameText) {
-        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
-    }
-    ts.getResolvedModule = getResolvedModule;
-    function setResolvedModule(sourceFile, moduleNameText, resolvedModule) {
-        if (!sourceFile.resolvedModules) {
-            sourceFile.resolvedModules = {};
-        }
-        sourceFile.resolvedModules[moduleNameText] = resolvedModule;
-    }
-    ts.setResolvedModule = setResolvedModule;
-    function setResolvedTypeReferenceDirective(sourceFile, typeReferenceDirectiveName, resolvedTypeReferenceDirective) {
-        if (!sourceFile.resolvedTypeReferenceDirectiveNames) {
-            sourceFile.resolvedTypeReferenceDirectiveNames = {};
-        }
-        sourceFile.resolvedTypeReferenceDirectiveNames[typeReferenceDirectiveName] = resolvedTypeReferenceDirective;
-    }
-    ts.setResolvedTypeReferenceDirective = setResolvedTypeReferenceDirective;
-    function moduleResolutionIsEqualTo(oldResolution, newResolution) {
-        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport;
-    }
-    ts.moduleResolutionIsEqualTo = moduleResolutionIsEqualTo;
-    function typeDirectiveIsEqualTo(oldResolution, newResolution) {
-        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.primary === newResolution.primary;
-    }
-    ts.typeDirectiveIsEqualTo = typeDirectiveIsEqualTo;
-    function hasChangesInResolutions(names, newResolutions, oldResolutions, comparer) {
-        if (names.length !== newResolutions.length) {
-            return false;
-        }
-        for (var i = 0; i < names.length; i++) {
-            var newResolution = newResolutions[i];
-            var oldResolution = oldResolutions && ts.hasProperty(oldResolutions, names[i]) ? oldResolutions[names[i]] : undefined;
-            var changed = oldResolution
-                ? !newResolution || !comparer(oldResolution, newResolution)
-                : newResolution;
-            if (changed) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.hasChangesInResolutions = hasChangesInResolutions;
-    function containsParseError(node) {
-        aggregateChildData(node);
-        return (node.flags & 268435456) !== 0;
-    }
-    ts.containsParseError = containsParseError;
-    function aggregateChildData(node) {
-        if (!(node.flags & 536870912)) {
-            var thisNodeOrAnySubNodesHasError = ((node.flags & 67108864) !== 0) ||
-                ts.forEachChild(node, containsParseError);
-            if (thisNodeOrAnySubNodesHasError) {
-                node.flags |= 268435456;
-            }
-            node.flags |= 536870912;
-        }
-    }
-    function getSourceFileOfNode(node) {
-        while (node && node.kind !== 256) {
-            node = node.parent;
-        }
-        return node;
-    }
-    ts.getSourceFileOfNode = getSourceFileOfNode;
-    function isStatementWithLocals(node) {
-        switch (node.kind) {
-            case 199:
-            case 227:
-            case 206:
-            case 207:
-            case 208:
-                return true;
-        }
-        return false;
-    }
-    ts.isStatementWithLocals = isStatementWithLocals;
-    function getStartPositionOfLine(line, sourceFile) {
-        ts.Debug.assert(line >= 0);
-        return ts.getLineStarts(sourceFile)[line];
-    }
-    ts.getStartPositionOfLine = getStartPositionOfLine;
-    function nodePosToString(node) {
-        var file = getSourceFileOfNode(node);
-        var loc = ts.getLineAndCharacterOfPosition(file, node.pos);
-        return file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + ")";
-    }
-    ts.nodePosToString = nodePosToString;
-    function getStartPosOfNode(node) {
-        return node.pos;
-    }
-    ts.getStartPosOfNode = getStartPosOfNode;
-    function getEndLinePosition(line, sourceFile) {
-        ts.Debug.assert(line >= 0);
-        var lineStarts = ts.getLineStarts(sourceFile);
-        var lineIndex = line;
-        var sourceText = sourceFile.text;
-        if (lineIndex + 1 === lineStarts.length) {
-            return sourceText.length - 1;
-        }
-        else {
-            var start = lineStarts[lineIndex];
-            var pos = lineStarts[lineIndex + 1] - 1;
-            ts.Debug.assert(ts.isLineBreak(sourceText.charCodeAt(pos)));
-            while (start <= pos && ts.isLineBreak(sourceText.charCodeAt(pos))) {
-                pos--;
-            }
-            return pos;
-        }
-    }
-    ts.getEndLinePosition = getEndLinePosition;
-    function nodeIsMissing(node) {
-        if (!node) {
-            return true;
-        }
-        return node.pos === node.end && node.pos >= 0 && node.kind !== 1;
-    }
-    ts.nodeIsMissing = nodeIsMissing;
-    function nodeIsPresent(node) {
-        return !nodeIsMissing(node);
-    }
-    ts.nodeIsPresent = nodeIsPresent;
-    function getTokenPosOfNode(node, sourceFile) {
-        if (nodeIsMissing(node)) {
-            return node.pos;
-        }
-        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
-    }
-    ts.getTokenPosOfNode = getTokenPosOfNode;
-    function getNonDecoratorTokenPosOfNode(node, sourceFile) {
-        if (nodeIsMissing(node) || !node.decorators) {
-            return getTokenPosOfNode(node, sourceFile);
-        }
-        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.decorators.end);
-    }
-    ts.getNonDecoratorTokenPosOfNode = getNonDecoratorTokenPosOfNode;
-    function getSourceTextOfNodeFromSourceFile(sourceFile, node, includeTrivia) {
-        if (includeTrivia === void 0) { includeTrivia = false; }
-        if (nodeIsMissing(node)) {
-            return "";
-        }
-        var text = sourceFile.text;
-        return text.substring(includeTrivia ? node.pos : ts.skipTrivia(text, node.pos), node.end);
-    }
-    ts.getSourceTextOfNodeFromSourceFile = getSourceTextOfNodeFromSourceFile;
-    function getTextOfNodeFromSourceText(sourceText, node) {
-        if (nodeIsMissing(node)) {
-            return "";
-        }
-        return sourceText.substring(ts.skipTrivia(sourceText, node.pos), node.end);
-    }
-    ts.getTextOfNodeFromSourceText = getTextOfNodeFromSourceText;
-    function getTextOfNode(node, includeTrivia) {
-        if (includeTrivia === void 0) { includeTrivia = false; }
-        return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
-    }
-    ts.getTextOfNode = getTextOfNode;
-    function escapeIdentifier(identifier) {
-        return identifier.length >= 2 && identifier.charCodeAt(0) === 95 && identifier.charCodeAt(1) === 95 ? "_" + identifier : identifier;
-    }
-    ts.escapeIdentifier = escapeIdentifier;
-    function unescapeIdentifier(identifier) {
-        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 && identifier.charCodeAt(1) === 95 && identifier.charCodeAt(2) === 95 ? identifier.substr(1) : identifier;
-    }
-    ts.unescapeIdentifier = unescapeIdentifier;
-    function makeIdentifierFromModuleName(moduleName) {
-        return ts.getBaseFileName(moduleName).replace(/^(\d)/, "_$1").replace(/\W/g, "_");
-    }
-    ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
-    function isBlockOrCatchScoped(declaration) {
-        return (getCombinedNodeFlags(declaration) & 3072) !== 0 ||
-            isCatchClauseVariableDeclaration(declaration);
-    }
-    ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
-    function isAmbientModule(node) {
-        return node && node.kind === 225 &&
-            (node.name.kind === 9 || isGlobalScopeAugmentation(node));
-    }
-    ts.isAmbientModule = isAmbientModule;
-    function isBlockScopedContainerTopLevel(node) {
-        return node.kind === 256 ||
-            node.kind === 225 ||
-            isFunctionLike(node) ||
-            isFunctionBlock(node);
-    }
-    ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
-    function isGlobalScopeAugmentation(module) {
-        return !!(module.flags & 131072);
-    }
-    ts.isGlobalScopeAugmentation = isGlobalScopeAugmentation;
-    function isExternalModuleAugmentation(node) {
-        if (!node || !isAmbientModule(node)) {
-            return false;
-        }
-        switch (node.parent.kind) {
-            case 256:
-                return ts.isExternalModule(node.parent);
-            case 226:
-                return isAmbientModule(node.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
-        }
-        return false;
-    }
-    ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
-    function getEnclosingBlockScopeContainer(node) {
-        var current = node.parent;
-        while (current) {
-            if (isFunctionLike(current)) {
-                return current;
-            }
-            switch (current.kind) {
-                case 256:
-                case 227:
-                case 252:
-                case 225:
-                case 206:
-                case 207:
-                case 208:
-                    return current;
-                case 199:
-                    if (!isFunctionLike(current.parent)) {
-                        return current;
-                    }
-            }
-            current = current.parent;
-        }
-    }
-    ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
-    function isCatchClauseVariableDeclaration(declaration) {
-        return declaration &&
-            declaration.kind === 218 &&
-            declaration.parent &&
-            declaration.parent.kind === 252;
-    }
-    ts.isCatchClauseVariableDeclaration = isCatchClauseVariableDeclaration;
-    function declarationNameToString(name) {
-        return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
-    }
-    ts.declarationNameToString = declarationNameToString;
-    function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
-        var sourceFile = getSourceFileOfNode(node);
-        var span = getErrorSpanForNode(sourceFile, node);
-        return ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2);
-    }
-    ts.createDiagnosticForNode = createDiagnosticForNode;
-    function createDiagnosticForNodeFromMessageChain(node, messageChain) {
-        var sourceFile = getSourceFileOfNode(node);
-        var span = getErrorSpanForNode(sourceFile, node);
-        return {
-            file: sourceFile,
-            start: span.start,
-            length: span.length,
-            code: messageChain.code,
-            category: messageChain.category,
-            messageText: messageChain.next ? messageChain : messageChain.messageText
-        };
-    }
-    ts.createDiagnosticForNodeFromMessageChain = createDiagnosticForNodeFromMessageChain;
-    function getSpanOfTokenAtPosition(sourceFile, pos) {
-        var scanner = ts.createScanner(sourceFile.languageVersion, true, sourceFile.languageVariant, sourceFile.text, undefined, pos);
-        scanner.scan();
-        var start = scanner.getTokenPos();
-        return ts.createTextSpanFromBounds(start, scanner.getTextPos());
-    }
-    ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
-    function getErrorSpanForArrowFunction(sourceFile, node) {
-        var pos = ts.skipTrivia(sourceFile.text, node.pos);
-        if (node.body && node.body.kind === 199) {
-            var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
-            var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
-            if (startLine < endLine) {
-                return ts.createTextSpan(pos, getEndLinePosition(startLine, sourceFile) - pos + 1);
-            }
-        }
-        return ts.createTextSpanFromBounds(pos, node.end);
-    }
-    function getErrorSpanForNode(sourceFile, node) {
-        var errorNode = node;
-        switch (node.kind) {
-            case 256:
-                var pos_1 = ts.skipTrivia(sourceFile.text, 0, false);
-                if (pos_1 === sourceFile.text.length) {
-                    return ts.createTextSpan(0, 0);
-                }
-                return getSpanOfTokenAtPosition(sourceFile, pos_1);
-            case 218:
-            case 169:
-            case 221:
-            case 192:
-            case 222:
-            case 225:
-            case 224:
-            case 255:
-            case 220:
-            case 179:
-            case 147:
-            case 149:
-            case 150:
-            case 223:
-                errorNode = node.name;
-                break;
-            case 180:
-                return getErrorSpanForArrowFunction(sourceFile, node);
-        }
-        if (errorNode === undefined) {
-            return getSpanOfTokenAtPosition(sourceFile, node.pos);
-        }
-        var pos = nodeIsMissing(errorNode)
-            ? errorNode.pos
-            : ts.skipTrivia(sourceFile.text, errorNode.pos);
-        return ts.createTextSpanFromBounds(pos, errorNode.end);
-    }
-    ts.getErrorSpanForNode = getErrorSpanForNode;
-    function isExternalOrCommonJsModule(file) {
-        return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
-    }
-    ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
-    function isDeclarationFile(file) {
-        return file.isDeclarationFile;
-    }
-    ts.isDeclarationFile = isDeclarationFile;
-    function isConstEnumDeclaration(node) {
-        return node.kind === 224 && isConst(node);
-    }
-    ts.isConstEnumDeclaration = isConstEnumDeclaration;
-    function walkUpBindingElementsAndPatterns(node) {
-        while (node && (node.kind === 169 || isBindingPattern(node))) {
-            node = node.parent;
-        }
-        return node;
-    }
-    function getCombinedNodeFlags(node) {
-        node = walkUpBindingElementsAndPatterns(node);
-        var flags = node.flags;
-        if (node.kind === 218) {
-            node = node.parent;
-        }
-        if (node && node.kind === 219) {
-            flags |= node.flags;
-            node = node.parent;
-        }
-        if (node && node.kind === 200) {
-            flags |= node.flags;
-        }
-        return flags;
-    }
-    ts.getCombinedNodeFlags = getCombinedNodeFlags;
-    function isConst(node) {
-        return !!(getCombinedNodeFlags(node) & 2048);
-    }
-    ts.isConst = isConst;
-    function isLet(node) {
-        return !!(getCombinedNodeFlags(node) & 1024);
-    }
-    ts.isLet = isLet;
-    function isSuperCallExpression(n) {
-        return n.kind === 174 && n.expression.kind === 95;
-    }
-    ts.isSuperCallExpression = isSuperCallExpression;
-    function isPrologueDirective(node) {
-        return node.kind === 202 && node.expression.kind === 9;
-    }
-    ts.isPrologueDirective = isPrologueDirective;
-    function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
-        return ts.getLeadingCommentRanges(sourceFileOfNode.text, node.pos);
-    }
-    ts.getLeadingCommentRangesOfNode = getLeadingCommentRangesOfNode;
-    function getLeadingCommentRangesOfNodeFromText(node, text) {
-        return ts.getLeadingCommentRanges(text, node.pos);
-    }
-    ts.getLeadingCommentRangesOfNodeFromText = getLeadingCommentRangesOfNodeFromText;
-    function getJsDocComments(node, sourceFileOfNode) {
-        return getJsDocCommentsFromText(node, sourceFileOfNode.text);
-    }
-    ts.getJsDocComments = getJsDocComments;
-    function getJsDocCommentsFromText(node, text) {
-        var commentRanges = (node.kind === 142 || node.kind === 141) ?
-            ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
-            getLeadingCommentRangesOfNodeFromText(node, text);
-        return ts.filter(commentRanges, isJsDocComment);
-        function isJsDocComment(comment) {
-            return text.charCodeAt(comment.pos + 1) === 42 &&
-                text.charCodeAt(comment.pos + 2) === 42 &&
-                text.charCodeAt(comment.pos + 3) !== 47;
-        }
-    }
-    ts.getJsDocCommentsFromText = getJsDocCommentsFromText;
-    ts.fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
-    ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx = /^(\/\/\/\s*<reference\s+types\s*=\s*)('|")(.+?)\2.*?\/>/;
-    ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
-    function isTypeNode(node) {
-        if (154 <= node.kind && node.kind <= 166) {
-            return true;
-        }
-        switch (node.kind) {
-            case 117:
-            case 130:
-            case 132:
-            case 120:
-            case 133:
-            case 135:
-            case 127:
-                return true;
-            case 103:
-                return node.parent.kind !== 183;
-            case 194:
-                return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
-            case 69:
-                if (node.parent.kind === 139 && node.parent.right === node) {
-                    node = node.parent;
-                }
-                else if (node.parent.kind === 172 && node.parent.name === node) {
-                    node = node.parent;
-                }
-                ts.Debug.assert(node.kind === 69 || node.kind === 139 || node.kind === 172, "'node' was expected to be a qualified name, identifier or property access in 'isTypeNode'.");
-            case 139:
-            case 172:
-            case 97:
-                var parent_1 = node.parent;
-                if (parent_1.kind === 158) {
-                    return false;
-                }
-                if (154 <= parent_1.kind && parent_1.kind <= 166) {
-                    return true;
-                }
-                switch (parent_1.kind) {
-                    case 194:
-                        return !isExpressionWithTypeArgumentsInClassExtendsClause(parent_1);
-                    case 141:
-                        return node === parent_1.constraint;
-                    case 145:
-                    case 144:
-                    case 142:
-                    case 218:
-                        return node === parent_1.type;
-                    case 220:
-                    case 179:
-                    case 180:
-                    case 148:
-                    case 147:
-                    case 146:
-                    case 149:
-                    case 150:
-                        return node === parent_1.type;
-                    case 151:
-                    case 152:
-                    case 153:
-                        return node === parent_1.type;
-                    case 177:
-                        return node === parent_1.type;
-                    case 174:
-                    case 175:
-                        return parent_1.typeArguments && ts.indexOf(parent_1.typeArguments, node) >= 0;
-                    case 176:
-                        return false;
-                }
-        }
-        return false;
-    }
-    ts.isTypeNode = isTypeNode;
-    function forEachReturnStatement(body, visitor) {
-        return traverse(body);
-        function traverse(node) {
-            switch (node.kind) {
-                case 211:
-                    return visitor(node);
-                case 227:
-                case 199:
-                case 203:
-                case 204:
-                case 205:
-                case 206:
-                case 207:
-                case 208:
-                case 212:
-                case 213:
-                case 249:
-                case 250:
-                case 214:
-                case 216:
-                case 252:
-                    return ts.forEachChild(node, traverse);
-            }
-        }
-    }
-    ts.forEachReturnStatement = forEachReturnStatement;
-    function forEachYieldExpression(body, visitor) {
-        return traverse(body);
-        function traverse(node) {
-            switch (node.kind) {
-                case 190:
-                    visitor(node);
-                    var operand = node.expression;
-                    if (operand) {
-                        traverse(operand);
-                    }
-                case 224:
-                case 222:
-                case 225:
-                case 223:
-                case 221:
-                case 192:
-                    return;
-                default:
-                    if (isFunctionLike(node)) {
-                        var name_5 = node.name;
-                        if (name_5 && name_5.kind === 140) {
-                            traverse(name_5.expression);
-                            return;
-                        }
-                    }
-                    else if (!isTypeNode(node)) {
-                        ts.forEachChild(node, traverse);
-                    }
-            }
-        }
-    }
-    ts.forEachYieldExpression = forEachYieldExpression;
-    function isVariableLike(node) {
-        if (node) {
-            switch (node.kind) {
-                case 169:
-                case 255:
-                case 142:
-                case 253:
-                case 145:
-                case 144:
-                case 254:
-                case 218:
-                    return true;
-            }
-        }
-        return false;
-    }
-    ts.isVariableLike = isVariableLike;
-    function isAccessor(node) {
-        return node && (node.kind === 149 || node.kind === 150);
-    }
-    ts.isAccessor = isAccessor;
-    function isClassLike(node) {
-        return node && (node.kind === 221 || node.kind === 192);
-    }
-    ts.isClassLike = isClassLike;
-    function isFunctionLike(node) {
-        return node && isFunctionLikeKind(node.kind);
-    }
-    ts.isFunctionLike = isFunctionLike;
-    function isFunctionLikeKind(kind) {
-        switch (kind) {
-            case 148:
-            case 179:
-            case 220:
-            case 180:
-            case 147:
-            case 146:
-            case 149:
-            case 150:
-            case 151:
-            case 152:
-            case 153:
-            case 156:
-            case 157:
-                return true;
-        }
-    }
-    ts.isFunctionLikeKind = isFunctionLikeKind;
-    function introducesArgumentsExoticObject(node) {
-        switch (node.kind) {
-            case 147:
-            case 146:
-            case 148:
-            case 149:
-            case 150:
-            case 220:
-            case 179:
-                return true;
-        }
-        return false;
-    }
-    ts.introducesArgumentsExoticObject = introducesArgumentsExoticObject;
-    function isIterationStatement(node, lookInLabeledStatements) {
-        switch (node.kind) {
-            case 206:
-            case 207:
-            case 208:
-            case 204:
-            case 205:
-                return true;
-            case 214:
-                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
-        }
-        return false;
-    }
-    ts.isIterationStatement = isIterationStatement;
-    function isFunctionBlock(node) {
-        return node && node.kind === 199 && isFunctionLike(node.parent);
-    }
-    ts.isFunctionBlock = isFunctionBlock;
-    function isObjectLiteralMethod(node) {
-        return node && node.kind === 147 && node.parent.kind === 171;
-    }
-    ts.isObjectLiteralMethod = isObjectLiteralMethod;
-    function isIdentifierTypePredicate(predicate) {
-        return predicate && predicate.kind === 1;
-    }
-    ts.isIdentifierTypePredicate = isIdentifierTypePredicate;
-    function isThisTypePredicate(predicate) {
-        return predicate && predicate.kind === 0;
-    }
-    ts.isThisTypePredicate = isThisTypePredicate;
-    function getContainingFunction(node) {
-        while (true) {
-            node = node.parent;
-            if (!node || isFunctionLike(node)) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingFunction = getContainingFunction;
-    function getContainingFunctionOrModule(node) {
-        while (true) {
-            node = node.parent;
-            if (isFunctionLike(node) || node.kind === 225 || node.kind === 256) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingFunctionOrModule = getContainingFunctionOrModule;
-    function getContainingClass(node) {
-        while (true) {
-            node = node.parent;
-            if (!node || isClassLike(node)) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingClass = getContainingClass;
-    function getThisContainer(node, includeArrowFunctions) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return undefined;
-            }
-            switch (node.kind) {
-                case 140:
-                    if (isClassLike(node.parent.parent)) {
-                        return node;
-                    }
-                    node = node.parent;
-                    break;
-                case 143:
-                    if (node.parent.kind === 142 && isClassElement(node.parent.parent)) {
-                        node = node.parent.parent;
-                    }
-                    else if (isClassElement(node.parent)) {
-                        node = node.parent;
-                    }
-                    break;
-                case 180:
-                    if (!includeArrowFunctions) {
-                        continue;
-                    }
-                case 220:
-                case 179:
-                case 225:
-                case 145:
-                case 144:
-                case 147:
-                case 146:
-                case 148:
-                case 149:
-                case 150:
-                case 151:
-                case 152:
-                case 153:
-                case 224:
-                case 256:
-                    return node;
-            }
-        }
-    }
-    ts.getThisContainer = getThisContainer;
-    function getSuperContainer(node, stopOnFunctions) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return node;
-            }
-            switch (node.kind) {
-                case 140:
-                    node = node.parent;
-                    break;
-                case 220:
-                case 179:
-                case 180:
-                    if (!stopOnFunctions) {
-                        continue;
-                    }
-                case 145:
-                case 144:
-                case 147:
-                case 146:
-                case 148:
-                case 149:
-                case 150:
-                    return node;
-                case 143:
-                    if (node.parent.kind === 142 && isClassElement(node.parent.parent)) {
-                        node = node.parent.parent;
-                    }
-                    else if (isClassElement(node.parent)) {
-                        node = node.parent;
-                    }
-                    break;
-            }
-        }
-    }
-    ts.getSuperContainer = getSuperContainer;
-    function isSuperPropertyOrElementAccess(node) {
-        return (node.kind === 172
-            || node.kind === 173)
-            && node.expression.kind === 95;
-    }
-    ts.isSuperPropertyOrElementAccess = isSuperPropertyOrElementAccess;
-    function getEntityNameFromTypeNode(node) {
-        if (node) {
-            switch (node.kind) {
-                case 155:
-                    return node.typeName;
-                case 194:
-                    return node.expression;
-                case 69:
-                case 139:
-                    return node;
-            }
-        }
-        return undefined;
-    }
-    ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
-    function getInvokedExpression(node) {
-        if (node.kind === 176) {
-            return node.tag;
-        }
-        return node.expression;
-    }
-    ts.getInvokedExpression = getInvokedExpression;
-    function nodeCanBeDecorated(node) {
-        switch (node.kind) {
-            case 221:
-                return true;
-            case 145:
-                return node.parent.kind === 221;
-            case 149:
-            case 150:
-            case 147:
-                return node.body !== undefined
-                    && node.parent.kind === 221;
-            case 142:
-                return node.parent.body !== undefined
-                    && (node.parent.kind === 148
-                        || node.parent.kind === 147
-                        || node.parent.kind === 150)
-                    && node.parent.parent.kind === 221;
-        }
-        return false;
-    }
-    ts.nodeCanBeDecorated = nodeCanBeDecorated;
-    function nodeIsDecorated(node) {
-        return node.decorators !== undefined
-            && nodeCanBeDecorated(node);
-    }
-    ts.nodeIsDecorated = nodeIsDecorated;
-    function isPropertyAccessExpression(node) {
-        return node.kind === 172;
-    }
-    ts.isPropertyAccessExpression = isPropertyAccessExpression;
-    function isElementAccessExpression(node) {
-        return node.kind === 173;
-    }
-    ts.isElementAccessExpression = isElementAccessExpression;
-    function isJSXTagName(node) {
-        var parent = node.parent;
-        if (parent.kind === 243 ||
-            parent.kind === 242 ||
-            parent.kind === 245) {
-            return parent.tagName === node;
-        }
-        return false;
-    }
-    ts.isJSXTagName = isJSXTagName;
-    function isExpression(node) {
-        switch (node.kind) {
-            case 97:
-            case 95:
-            case 93:
-            case 99:
-            case 84:
-            case 10:
-            case 170:
-            case 171:
-            case 172:
-            case 173:
-            case 174:
-            case 175:
-            case 176:
-            case 195:
-            case 177:
-            case 196:
-            case 178:
-            case 179:
-            case 192:
-            case 180:
-            case 183:
-            case 181:
-            case 182:
-            case 185:
-            case 186:
-            case 187:
-            case 188:
-            case 191:
-            case 189:
-            case 11:
-            case 193:
-            case 241:
-            case 242:
-            case 190:
-            case 184:
-                return true;
-            case 139:
-                while (node.parent.kind === 139) {
-                    node = node.parent;
-                }
-                return node.parent.kind === 158 || isJSXTagName(node);
-            case 69:
-                if (node.parent.kind === 158 || isJSXTagName(node)) {
-                    return true;
-                }
-            case 8:
-            case 9:
-            case 97:
-                var parent_2 = node.parent;
-                switch (parent_2.kind) {
-                    case 218:
-                    case 142:
-                    case 145:
-                    case 144:
-                    case 255:
-                    case 253:
-                    case 169:
-                        return parent_2.initializer === node;
-                    case 202:
-                    case 203:
-                    case 204:
-                    case 205:
-                    case 211:
-                    case 212:
-                    case 213:
-                    case 249:
-                    case 215:
-                    case 213:
-                        return parent_2.expression === node;
-                    case 206:
-                        var forStatement = parent_2;
-                        return (forStatement.initializer === node && forStatement.initializer.kind !== 219) ||
-                            forStatement.condition === node ||
-                            forStatement.incrementor === node;
-                    case 207:
-                    case 208:
-                        var forInStatement = parent_2;
-                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 219) ||
-                            forInStatement.expression === node;
-                    case 177:
-                    case 195:
-                        return node === parent_2.expression;
-                    case 197:
-                        return node === parent_2.expression;
-                    case 140:
-                        return node === parent_2.expression;
-                    case 143:
-                    case 248:
-                    case 247:
-                        return true;
-                    case 194:
-                        return parent_2.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent_2);
-                    default:
-                        if (isExpression(parent_2)) {
-                            return true;
-                        }
-                }
-        }
-        return false;
-    }
-    ts.isExpression = isExpression;
-    function isExternalModuleNameRelative(moduleName) {
-        return moduleName.substr(0, 2) === "./" || moduleName.substr(0, 3) === "../" || moduleName.substr(0, 2) === ".\\" || moduleName.substr(0, 3) === "..\\";
-    }
-    ts.isExternalModuleNameRelative = isExternalModuleNameRelative;
-    function isInstantiatedModule(node, preserveConstEnums) {
-        var moduleState = ts.getModuleInstanceState(node);
-        return moduleState === 1 ||
-            (preserveConstEnums && moduleState === 2);
-    }
-    ts.isInstantiatedModule = isInstantiatedModule;
-    function isExternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 && node.moduleReference.kind === 240;
-    }
-    ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
-    function getExternalModuleImportEqualsDeclarationExpression(node) {
-        ts.Debug.assert(isExternalModuleImportEqualsDeclaration(node));
-        return node.moduleReference.expression;
-    }
-    ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
-    function isInternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 && node.moduleReference.kind !== 240;
-    }
-    ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
-    function isSourceFileJavaScript(file) {
-        return isInJavaScriptFile(file);
-    }
-    ts.isSourceFileJavaScript = isSourceFileJavaScript;
-    function isInJavaScriptFile(node) {
-        return node && !!(node.flags & 134217728);
-    }
-    ts.isInJavaScriptFile = isInJavaScriptFile;
-    function isRequireCall(expression, checkArgumentIsStringLiteral) {
-        var isRequire = expression.kind === 174 &&
-            expression.expression.kind === 69 &&
-            expression.expression.text === "require" &&
-            expression.arguments.length === 1;
-        return isRequire && (!checkArgumentIsStringLiteral || expression.arguments[0].kind === 9);
-    }
-    ts.isRequireCall = isRequireCall;
-    function isSingleOrDoubleQuote(charCode) {
-        return charCode === 39 || charCode === 34;
-    }
-    ts.isSingleOrDoubleQuote = isSingleOrDoubleQuote;
-    function getSpecialPropertyAssignmentKind(expression) {
-        if (!isInJavaScriptFile(expression)) {
-            return 0;
-        }
-        if (expression.kind !== 187) {
-            return 0;
-        }
-        var expr = expression;
-        if (expr.operatorToken.kind !== 56 || expr.left.kind !== 172) {
-            return 0;
-        }
-        var lhs = expr.left;
-        if (lhs.expression.kind === 69) {
-            var lhsId = lhs.expression;
-            if (lhsId.text === "exports") {
-                return 1;
-            }
-            else if (lhsId.text === "module" && lhs.name.text === "exports") {
-                return 2;
-            }
-        }
-        else if (lhs.expression.kind === 97) {
-            return 4;
-        }
-        else if (lhs.expression.kind === 172) {
-            var innerPropertyAccess = lhs.expression;
-            if (innerPropertyAccess.expression.kind === 69) {
-                var innerPropertyAccessIdentifier = innerPropertyAccess.expression;
-                if (innerPropertyAccessIdentifier.text === "module" && innerPropertyAccess.name.text === "exports") {
-                    return 1;
-                }
-                if (innerPropertyAccess.name.text === "prototype") {
-                    return 3;
-                }
-            }
-        }
-        return 0;
-    }
-    ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
-    function getExternalModuleName(node) {
-        if (node.kind === 230) {
-            return node.moduleSpecifier;
-        }
-        if (node.kind === 229) {
-            var reference = node.moduleReference;
-            if (reference.kind === 240) {
-                return reference.expression;
-            }
-        }
-        if (node.kind === 236) {
-            return node.moduleSpecifier;
-        }
-        if (node.kind === 225 && node.name.kind === 9) {
-            return node.name;
-        }
-    }
-    ts.getExternalModuleName = getExternalModuleName;
-    function hasQuestionToken(node) {
-        if (node) {
-            switch (node.kind) {
-                case 142:
-                case 147:
-                case 146:
-                case 254:
-                case 253:
-                case 145:
-                case 144:
-                    return node.questionToken !== undefined;
-            }
-        }
-        return false;
-    }
-    ts.hasQuestionToken = hasQuestionToken;
-    function isJSDocConstructSignature(node) {
-        return node.kind === 269 &&
-            node.parameters.length > 0 &&
-            node.parameters[0].type.kind === 271;
-    }
-    ts.isJSDocConstructSignature = isJSDocConstructSignature;
-    function getJSDocTag(node, kind, checkParentVariableStatement) {
-        if (!node) {
-            return undefined;
-        }
-        var jsDocComment = getJSDocComment(node, checkParentVariableStatement);
-        if (!jsDocComment) {
-            return undefined;
-        }
-        for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-            var tag = _a[_i];
-            if (tag.kind === kind) {
-                return tag;
-            }
-        }
-    }
-    function getJSDocComment(node, checkParentVariableStatement) {
-        if (node.jsDocComment) {
-            return node.jsDocComment;
-        }
-        if (checkParentVariableStatement) {
-            var isInitializerOfVariableDeclarationInStatement = node.parent.kind === 218 &&
-                node.parent.initializer === node &&
-                node.parent.parent.parent.kind === 200;
-            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent : undefined;
-            if (variableStatementNode) {
-                return variableStatementNode.jsDocComment;
-            }
-            var parent_3 = node.parent;
-            var isSourceOfAssignmentExpressionStatement = parent_3 && parent_3.parent &&
-                parent_3.kind === 187 &&
-                parent_3.operatorToken.kind === 56 &&
-                parent_3.parent.kind === 202;
-            if (isSourceOfAssignmentExpressionStatement) {
-                return parent_3.parent.jsDocComment;
-            }
-            var isPropertyAssignmentExpression = parent_3 && parent_3.kind === 253;
-            if (isPropertyAssignmentExpression) {
-                return parent_3.jsDocComment;
-            }
-        }
-        return undefined;
-    }
-    function getJSDocTypeTag(node) {
-        return getJSDocTag(node, 277, false);
-    }
-    ts.getJSDocTypeTag = getJSDocTypeTag;
-    function getJSDocReturnTag(node) {
-        return getJSDocTag(node, 276, true);
-    }
-    ts.getJSDocReturnTag = getJSDocReturnTag;
-    function getJSDocTemplateTag(node) {
-        return getJSDocTag(node, 278, false);
-    }
-    ts.getJSDocTemplateTag = getJSDocTemplateTag;
-    function getCorrespondingJSDocParameterTag(parameter) {
-        if (parameter.name && parameter.name.kind === 69) {
-            var parameterName = parameter.name.text;
-            var jsDocComment = getJSDocComment(parameter.parent, true);
-            if (jsDocComment) {
-                for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-                    var tag = _a[_i];
-                    if (tag.kind === 275) {
-                        var parameterTag = tag;
-                        var name_6 = parameterTag.preParameterName || parameterTag.postParameterName;
-                        if (name_6.text === parameterName) {
-                            return parameterTag;
-                        }
-                    }
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getCorrespondingJSDocParameterTag = getCorrespondingJSDocParameterTag;
-    function hasRestParameter(s) {
-        return isRestParameter(ts.lastOrUndefined(s.parameters));
-    }
-    ts.hasRestParameter = hasRestParameter;
-    function hasDeclaredRestParameter(s) {
-        return isDeclaredRestParam(ts.lastOrUndefined(s.parameters));
-    }
-    ts.hasDeclaredRestParameter = hasDeclaredRestParameter;
-    function isRestParameter(node) {
-        if (node && (node.flags & 134217728)) {
-            if (node.type && node.type.kind === 270) {
-                return true;
-            }
-            var paramTag = getCorrespondingJSDocParameterTag(node);
-            if (paramTag && paramTag.typeExpression) {
-                return paramTag.typeExpression.type.kind === 270;
-            }
-        }
-        return isDeclaredRestParam(node);
-    }
-    ts.isRestParameter = isRestParameter;
-    function isDeclaredRestParam(node) {
-        return node && node.dotDotDotToken !== undefined;
-    }
-    ts.isDeclaredRestParam = isDeclaredRestParam;
-    function isLiteralKind(kind) {
-        return 8 <= kind && kind <= 11;
-    }
-    ts.isLiteralKind = isLiteralKind;
-    function isTextualLiteralKind(kind) {
-        return kind === 9 || kind === 11;
-    }
-    ts.isTextualLiteralKind = isTextualLiteralKind;
-    function isTemplateLiteralKind(kind) {
-        return 11 <= kind && kind <= 14;
-    }
-    ts.isTemplateLiteralKind = isTemplateLiteralKind;
-    function isBindingPattern(node) {
-        return !!node && (node.kind === 168 || node.kind === 167);
-    }
-    ts.isBindingPattern = isBindingPattern;
-    function isAssignmentTarget(node) {
-        while (node.parent.kind === 178) {
-            node = node.parent;
-        }
-        while (true) {
-            var parent_4 = node.parent;
-            if (parent_4.kind === 170 || parent_4.kind === 191) {
-                node = parent_4;
-                continue;
-            }
-            if (parent_4.kind === 253 || parent_4.kind === 254) {
-                node = parent_4.parent;
-                continue;
-            }
-            return parent_4.kind === 187 &&
-                parent_4.operatorToken.kind === 56 &&
-                parent_4.left === node ||
-                (parent_4.kind === 207 || parent_4.kind === 208) &&
-                    parent_4.initializer === node;
-        }
-    }
-    ts.isAssignmentTarget = isAssignmentTarget;
-    function isNodeDescendentOf(node, ancestor) {
-        while (node) {
-            if (node === ancestor)
-                return true;
-            node = node.parent;
-        }
-        return false;
-    }
-    ts.isNodeDescendentOf = isNodeDescendentOf;
-    function isInAmbientContext(node) {
-        while (node) {
-            if (node.flags & 2 || (node.kind === 256 && node.isDeclarationFile)) {
-                return true;
-            }
-            node = node.parent;
-        }
-        return false;
-    }
-    ts.isInAmbientContext = isInAmbientContext;
-    function isDeclaration(node) {
-        switch (node.kind) {
-            case 180:
-            case 169:
-            case 221:
-            case 192:
-            case 148:
-            case 224:
-            case 255:
-            case 238:
-            case 220:
-            case 179:
-            case 149:
-            case 231:
-            case 229:
-            case 234:
-            case 222:
-            case 147:
-            case 146:
-            case 225:
-            case 232:
-            case 142:
-            case 253:
-            case 145:
-            case 144:
-            case 150:
-            case 254:
-            case 223:
-            case 141:
-            case 218:
-                return true;
-        }
-        return false;
-    }
-    ts.isDeclaration = isDeclaration;
-    function isStatement(n) {
-        switch (n.kind) {
-            case 210:
-            case 209:
-            case 217:
-            case 204:
-            case 202:
-            case 201:
-            case 207:
-            case 208:
-            case 206:
-            case 203:
-            case 214:
-            case 211:
-            case 213:
-            case 215:
-            case 216:
-            case 200:
-            case 205:
-            case 212:
-            case 235:
-                return true;
-            default:
-                return false;
-        }
-    }
-    ts.isStatement = isStatement;
-    function isClassElement(n) {
-        switch (n.kind) {
-            case 148:
-            case 145:
-            case 147:
-            case 149:
-            case 150:
-            case 146:
-            case 153:
-                return true;
-            default:
-                return false;
-        }
-    }
-    ts.isClassElement = isClassElement;
-    function isDeclarationName(name) {
-        if (name.kind !== 69 && name.kind !== 9 && name.kind !== 8) {
-            return false;
-        }
-        var parent = name.parent;
-        if (parent.kind === 234 || parent.kind === 238) {
-            if (parent.propertyName) {
-                return true;
-            }
-        }
-        if (isDeclaration(parent)) {
-            return parent.name === name;
-        }
-        return false;
-    }
-    ts.isDeclarationName = isDeclarationName;
-    function isLiteralComputedPropertyDeclarationName(node) {
-        return (node.kind === 9 || node.kind === 8) &&
-            node.parent.kind === 140 &&
-            isDeclaration(node.parent.parent);
-    }
-    ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
-    function isIdentifierName(node) {
-        var parent = node.parent;
-        switch (parent.kind) {
-            case 145:
-            case 144:
-            case 147:
-            case 146:
-            case 149:
-            case 150:
-            case 255:
-            case 253:
-            case 172:
-                return parent.name === node;
-            case 139:
-                if (parent.right === node) {
-                    while (parent.kind === 139) {
-                        parent = parent.parent;
-                    }
-                    return parent.kind === 158;
-                }
-                return false;
-            case 169:
-            case 234:
-                return parent.propertyName === node;
-            case 238:
-                return true;
-        }
-        return false;
-    }
-    ts.isIdentifierName = isIdentifierName;
-    function isAliasSymbolDeclaration(node) {
-        return node.kind === 229 ||
-            node.kind === 228 ||
-            node.kind === 231 && !!node.name ||
-            node.kind === 232 ||
-            node.kind === 234 ||
-            node.kind === 238 ||
-            node.kind === 235 && node.expression.kind === 69;
-    }
-    ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
-    function getClassExtendsHeritageClauseElement(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83);
-        return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
-    }
-    ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
-    function getClassImplementsHeritageClauseElements(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 106);
-        return heritageClause ? heritageClause.types : undefined;
-    }
-    ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
-    function getInterfaceBaseTypeNodes(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83);
-        return heritageClause ? heritageClause.types : undefined;
-    }
-    ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
-    function getHeritageClause(clauses, kind) {
-        if (clauses) {
-            for (var _i = 0, clauses_1 = clauses; _i < clauses_1.length; _i++) {
-                var clause = clauses_1[_i];
-                if (clause.token === kind) {
-                    return clause;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getHeritageClause = getHeritageClause;
-    function tryResolveScriptReference(host, sourceFile, reference) {
-        if (!host.getCompilerOptions().noResolve) {
-            var referenceFileName = ts.isRootedDiskPath(reference.fileName) ? reference.fileName : ts.combinePaths(ts.getDirectoryPath(sourceFile.fileName), reference.fileName);
-            return host.getSourceFile(referenceFileName);
-        }
-    }
-    ts.tryResolveScriptReference = tryResolveScriptReference;
-    function getAncestor(node, kind) {
-        while (node) {
-            if (node.kind === kind) {
-                return node;
-            }
-            node = node.parent;
-        }
-        return undefined;
-    }
-    ts.getAncestor = getAncestor;
-    function getFileReferenceFromReferencePath(comment, commentRange) {
-        var simpleReferenceRegEx = /^\/\/\/\s*<reference\s+/gim;
-        var isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
-        if (simpleReferenceRegEx.test(comment)) {
-            if (isNoDefaultLibRegEx.test(comment)) {
-                return {
-                    isNoDefaultLib: true
-                };
-            }
-            else {
-                var refMatchResult = ts.fullTripleSlashReferencePathRegEx.exec(comment);
-                var refLibResult = !refMatchResult && ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx.exec(comment);
-                if (refMatchResult || refLibResult) {
-                    var start = commentRange.pos;
-                    var end = commentRange.end;
-                    return {
-                        fileReference: {
-                            pos: start,
-                            end: end,
-                            fileName: (refMatchResult || refLibResult)[3]
-                        },
-                        isNoDefaultLib: false,
-                        isTypeReferenceDirective: !!refLibResult
-                    };
-                }
-                return {
-                    diagnosticMessage: ts.Diagnostics.Invalid_reference_directive_syntax,
-                    isNoDefaultLib: false
-                };
-            }
-        }
-        return undefined;
-    }
-    ts.getFileReferenceFromReferencePath = getFileReferenceFromReferencePath;
-    function isKeyword(token) {
-        return 70 <= token && token <= 138;
-    }
-    ts.isKeyword = isKeyword;
-    function isTrivia(token) {
-        return 2 <= token && token <= 7;
-    }
-    ts.isTrivia = isTrivia;
-    function isAsyncFunctionLike(node) {
-        return isFunctionLike(node) && (node.flags & 256) !== 0 && !isAccessor(node);
-    }
-    ts.isAsyncFunctionLike = isAsyncFunctionLike;
-    function isStringOrNumericLiteral(kind) {
-        return kind === 9 || kind === 8;
-    }
-    ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
-    function hasDynamicName(declaration) {
-        return declaration.name && isDynamicName(declaration.name);
-    }
-    ts.hasDynamicName = hasDynamicName;
-    function isDynamicName(name) {
-        return name.kind === 140 &&
-            !isStringOrNumericLiteral(name.expression.kind) &&
-            !isWellKnownSymbolSyntactically(name.expression);
-    }
-    ts.isDynamicName = isDynamicName;
-    function isWellKnownSymbolSyntactically(node) {
-        return isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
-    }
-    ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
-    function getPropertyNameForPropertyNameNode(name) {
-        if (name.kind === 69 || name.kind === 9 || name.kind === 8 || name.kind === 142) {
-            return name.text;
-        }
-        if (name.kind === 140) {
-            var nameExpression = name.expression;
-            if (isWellKnownSymbolSyntactically(nameExpression)) {
-                var rightHandSideName = nameExpression.name.text;
-                return getPropertyNameForKnownSymbolName(rightHandSideName);
-            }
-            else if (nameExpression.kind === 9 || nameExpression.kind === 8) {
-                return nameExpression.text;
-            }
-        }
-        return undefined;
-    }
-    ts.getPropertyNameForPropertyNameNode = getPropertyNameForPropertyNameNode;
-    function getPropertyNameForKnownSymbolName(symbolName) {
-        return "__@" + symbolName;
-    }
-    ts.getPropertyNameForKnownSymbolName = getPropertyNameForKnownSymbolName;
-    function isESSymbolIdentifier(node) {
-        return node.kind === 69 && node.text === "Symbol";
-    }
-    ts.isESSymbolIdentifier = isESSymbolIdentifier;
-    function isModifierKind(token) {
-        switch (token) {
-            case 115:
-            case 118:
-            case 74:
-            case 122:
-            case 77:
-            case 82:
-            case 112:
-            case 110:
-            case 111:
-            case 128:
-            case 113:
-                return true;
-        }
-        return false;
-    }
-    ts.isModifierKind = isModifierKind;
-    function isParameterDeclaration(node) {
-        var root = getRootDeclaration(node);
-        return root.kind === 142;
-    }
-    ts.isParameterDeclaration = isParameterDeclaration;
-    function getRootDeclaration(node) {
-        while (node.kind === 169) {
-            node = node.parent.parent;
-        }
-        return node;
-    }
-    ts.getRootDeclaration = getRootDeclaration;
-    function nodeStartsNewLexicalEnvironment(n) {
-        return isFunctionLike(n) || n.kind === 225 || n.kind === 256;
-    }
-    ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
-    function cloneNode(node, location, flags, parent) {
-        var clone = location !== undefined
-            ? ts.createNode(node.kind, location.pos, location.end)
-            : createSynthesizedNode(node.kind);
-        for (var key in node) {
-            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
-                continue;
-            }
-            clone[key] = node[key];
-        }
-        if (flags !== undefined) {
-            clone.flags = flags;
-        }
-        if (parent !== undefined) {
-            clone.parent = parent;
-        }
-        return clone;
-    }
-    ts.cloneNode = cloneNode;
-    function cloneEntityName(node, parent) {
-        var clone = cloneNode(node, node, node.flags, parent);
-        if (isQualifiedName(clone)) {
-            var left = clone.left, right = clone.right;
-            clone.left = cloneEntityName(left, clone);
-            clone.right = cloneNode(right, right, right.flags, parent);
-        }
-        return clone;
-    }
-    ts.cloneEntityName = cloneEntityName;
-    function isQualifiedName(node) {
-        return node.kind === 139;
-    }
-    ts.isQualifiedName = isQualifiedName;
-    function nodeIsSynthesized(node) {
-        return node.pos === -1;
-    }
-    ts.nodeIsSynthesized = nodeIsSynthesized;
-    function createSynthesizedNode(kind, startsOnNewLine) {
-        var node = ts.createNode(kind, -1, -1);
-        node.startsOnNewLine = startsOnNewLine;
-        return node;
-    }
-    ts.createSynthesizedNode = createSynthesizedNode;
-    function createSynthesizedNodeArray() {
-        var array = [];
-        array.pos = -1;
-        array.end = -1;
-        return array;
-    }
-    ts.createSynthesizedNodeArray = createSynthesizedNodeArray;
-    function createDiagnosticCollection() {
-        var nonFileDiagnostics = [];
-        var fileDiagnostics = {};
-        var diagnosticsModified = false;
-        var modificationCount = 0;
-        return {
-            add: add,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getDiagnostics: getDiagnostics,
-            getModificationCount: getModificationCount,
-            reattachFileDiagnostics: reattachFileDiagnostics
-        };
-        function getModificationCount() {
-            return modificationCount;
-        }
-        function reattachFileDiagnostics(newFile) {
-            if (!ts.hasProperty(fileDiagnostics, newFile.fileName)) {
-                return;
-            }
-            for (var _i = 0, _a = fileDiagnostics[newFile.fileName]; _i < _a.length; _i++) {
-                var diagnostic = _a[_i];
-                diagnostic.file = newFile;
-            }
-        }
-        function add(diagnostic) {
-            var diagnostics;
-            if (diagnostic.file) {
-                diagnostics = fileDiagnostics[diagnostic.file.fileName];
-                if (!diagnostics) {
-                    diagnostics = [];
-                    fileDiagnostics[diagnostic.file.fileName] = diagnostics;
-                }
-            }
-            else {
-                diagnostics = nonFileDiagnostics;
-            }
-            diagnostics.push(diagnostic);
-            diagnosticsModified = true;
-            modificationCount++;
-        }
-        function getGlobalDiagnostics() {
-            sortAndDeduplicate();
-            return nonFileDiagnostics;
-        }
-        function getDiagnostics(fileName) {
-            sortAndDeduplicate();
-            if (fileName) {
-                return fileDiagnostics[fileName] || [];
-            }
-            var allDiagnostics = [];
-            function pushDiagnostic(d) {
-                allDiagnostics.push(d);
-            }
-            ts.forEach(nonFileDiagnostics, pushDiagnostic);
-            for (var key in fileDiagnostics) {
-                if (ts.hasProperty(fileDiagnostics, key)) {
-                    ts.forEach(fileDiagnostics[key], pushDiagnostic);
-                }
-            }
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function sortAndDeduplicate() {
-            if (!diagnosticsModified) {
-                return;
-            }
-            diagnosticsModified = false;
-            nonFileDiagnostics = ts.sortAndDeduplicateDiagnostics(nonFileDiagnostics);
-            for (var key in fileDiagnostics) {
-                if (ts.hasProperty(fileDiagnostics, key)) {
-                    fileDiagnostics[key] = ts.sortAndDeduplicateDiagnostics(fileDiagnostics[key]);
-                }
-            }
-        }
-    }
-    ts.createDiagnosticCollection = createDiagnosticCollection;
-    var escapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
-    var escapedCharsMap = {
-        "\0": "\\0",
-        "\t": "\\t",
-        "\v": "\\v",
-        "\f": "\\f",
-        "\b": "\\b",
-        "\r": "\\r",
-        "\n": "\\n",
-        "\\": "\\\\",
-        "\"": "\\\"",
-        "\u2028": "\\u2028",
-        "\u2029": "\\u2029",
-        "\u0085": "\\u0085"
-    };
-    function escapeString(s) {
-        s = escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, getReplacement) : s;
-        return s;
-        function getReplacement(c) {
-            return escapedCharsMap[c] || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
-        }
-    }
-    ts.escapeString = escapeString;
-    function isIntrinsicJsxName(name) {
-        var ch = name.substr(0, 1);
-        return ch.toLowerCase() === ch;
-    }
-    ts.isIntrinsicJsxName = isIntrinsicJsxName;
-    function get16BitUnicodeEscapeSequence(charCode) {
-        var hexCharCode = charCode.toString(16).toUpperCase();
-        var paddedHexCode = ("0000" + hexCharCode).slice(-4);
-        return "\\u" + paddedHexCode;
-    }
-    var nonAsciiCharacters = /[^\u0000-\u007F]/g;
-    function escapeNonAsciiCharacters(s) {
-        return nonAsciiCharacters.test(s) ?
-            s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
-            s;
-    }
-    ts.escapeNonAsciiCharacters = escapeNonAsciiCharacters;
-    var indentStrings = ["", "    "];
-    function getIndentString(level) {
-        if (indentStrings[level] === undefined) {
-            indentStrings[level] = getIndentString(level - 1) + indentStrings[1];
-        }
-        return indentStrings[level];
-    }
-    ts.getIndentString = getIndentString;
-    function getIndentSize() {
-        return indentStrings[1].length;
-    }
-    ts.getIndentSize = getIndentSize;
-    function createTextWriter(newLine) {
-        var output;
-        var indent;
-        var lineStart;
-        var lineCount;
-        var linePos;
-        function write(s) {
-            if (s && s.length) {
-                if (lineStart) {
-                    output += getIndentString(indent);
-                    lineStart = false;
-                }
-                output += s;
-            }
-        }
-        function reset() {
-            output = "";
-            indent = 0;
-            lineStart = true;
-            lineCount = 0;
-            linePos = 0;
-        }
-        function rawWrite(s) {
-            if (s !== undefined) {
-                if (lineStart) {
-                    lineStart = false;
-                }
-                output += s;
-            }
-        }
-        function writeLiteral(s) {
-            if (s && s.length) {
-                write(s);
-                var lineStartsOfS = ts.computeLineStarts(s);
-                if (lineStartsOfS.length > 1) {
-                    lineCount = lineCount + lineStartsOfS.length - 1;
-                    linePos = output.length - s.length + ts.lastOrUndefined(lineStartsOfS);
-                }
-            }
-        }
-        function writeLine() {
-            if (!lineStart) {
-                output += newLine;
-                lineCount++;
-                linePos = output.length;
-                lineStart = true;
-            }
-        }
-        function writeTextOfNode(text, node) {
-            write(getTextOfNodeFromSourceText(text, node));
-        }
-        reset();
-        return {
-            write: write,
-            rawWrite: rawWrite,
-            writeTextOfNode: writeTextOfNode,
-            writeLiteral: writeLiteral,
-            writeLine: writeLine,
-            increaseIndent: function () { indent++; },
-            decreaseIndent: function () { indent--; },
-            getIndent: function () { return indent; },
-            getTextPos: function () { return output.length; },
-            getLine: function () { return lineCount + 1; },
-            getColumn: function () { return lineStart ? indent * getIndentSize() + 1 : output.length - linePos + 1; },
-            getText: function () { return output; },
-            reset: reset
-        };
-    }
-    ts.createTextWriter = createTextWriter;
-    function getExternalModuleNameFromPath(host, fileName) {
-        var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
-        var dir = ts.toPath(host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
-        var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
-        var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, false);
-        return ts.removeFileExtension(relativePath);
-    }
-    ts.getExternalModuleNameFromPath = getExternalModuleNameFromPath;
-    function getOwnEmitOutputFilePath(sourceFile, host, extension) {
-        var compilerOptions = host.getCompilerOptions();
-        var emitOutputFilePathWithoutExtension;
-        if (compilerOptions.outDir) {
-            emitOutputFilePathWithoutExtension = ts.removeFileExtension(getSourceFilePathInNewDir(sourceFile, host, compilerOptions.outDir));
-        }
-        else {
-            emitOutputFilePathWithoutExtension = ts.removeFileExtension(sourceFile.fileName);
-        }
-        return emitOutputFilePathWithoutExtension + extension;
-    }
-    ts.getOwnEmitOutputFilePath = getOwnEmitOutputFilePath;
-    function getDeclarationEmitOutputFilePath(sourceFile, host) {
-        var options = host.getCompilerOptions();
-        var outputDir = options.declarationDir || options.outDir;
-        if (options.declaration) {
-            var path = outputDir
-                ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
-                : sourceFile.fileName;
-            return ts.removeFileExtension(path) + ".d.ts";
-        }
-    }
-    ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
-    function getEmitScriptTarget(compilerOptions) {
-        return compilerOptions.target || 0;
-    }
-    ts.getEmitScriptTarget = getEmitScriptTarget;
-    function getEmitModuleKind(compilerOptions) {
-        return typeof compilerOptions.module === "number" ?
-            compilerOptions.module :
-            getEmitScriptTarget(compilerOptions) === 2 ? ts.ModuleKind.ES6 : ts.ModuleKind.CommonJS;
-    }
-    ts.getEmitModuleKind = getEmitModuleKind;
-    function forEachExpectedEmitFile(host, action, targetSourceFile) {
-        var options = host.getCompilerOptions();
-        if (options.outFile || options.out) {
-            onBundledEmit(host);
-        }
-        else {
-            var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
-            for (var _i = 0, sourceFiles_1 = sourceFiles; _i < sourceFiles_1.length; _i++) {
-                var sourceFile = sourceFiles_1[_i];
-                if (!isDeclarationFile(sourceFile)) {
-                    onSingleFileEmit(host, sourceFile);
-                }
-            }
-        }
-        function onSingleFileEmit(host, sourceFile) {
-            var extension = ".js";
-            if (options.jsx === 1) {
-                if (isSourceFileJavaScript(sourceFile)) {
-                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
-                        extension = ".jsx";
-                    }
-                }
-                else if (sourceFile.languageVariant === 1) {
-                    extension = ".jsx";
-                }
-            }
-            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
-            var emitFileNames = {
-                jsFilePath: jsFilePath,
-                sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                declarationFilePath: !isSourceFileJavaScript(sourceFile) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined
-            };
-            action(emitFileNames, [sourceFile], false);
-        }
-        function onBundledEmit(host) {
-            var bundledSources = ts.filter(host.getSourceFiles(), function (sourceFile) {
-                return !isDeclarationFile(sourceFile)
-                    && (!ts.isExternalModule(sourceFile) || !!getEmitModuleKind(options));
-            });
-            if (bundledSources.length) {
-                var jsFilePath = options.outFile || options.out;
-                var emitFileNames = {
-                    jsFilePath: jsFilePath,
-                    sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                    declarationFilePath: options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined
-                };
-                action(emitFileNames, bundledSources, true);
-            }
-        }
-        function getSourceMapFilePath(jsFilePath, options) {
-            return options.sourceMap ? jsFilePath + ".map" : undefined;
-        }
-    }
-    ts.forEachExpectedEmitFile = forEachExpectedEmitFile;
-    function getSourceFilePathInNewDir(sourceFile, host, newDirPath) {
-        var sourceFilePath = ts.getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
-        sourceFilePath = sourceFilePath.replace(host.getCommonSourceDirectory(), "");
-        return ts.combinePaths(newDirPath, sourceFilePath);
-    }
-    ts.getSourceFilePathInNewDir = getSourceFilePathInNewDir;
-    function writeFile(host, diagnostics, fileName, data, writeByteOrderMark, sourceFiles) {
-        host.writeFile(fileName, data, writeByteOrderMark, function (hostErrorMessage) {
-            diagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Could_not_write_file_0_Colon_1, fileName, hostErrorMessage));
-        }, sourceFiles);
-    }
-    ts.writeFile = writeFile;
-    function getLineOfLocalPosition(currentSourceFile, pos) {
-        return ts.getLineAndCharacterOfPosition(currentSourceFile, pos).line;
-    }
-    ts.getLineOfLocalPosition = getLineOfLocalPosition;
-    function getLineOfLocalPositionFromLineMap(lineMap, pos) {
-        return ts.computeLineAndCharacterOfPosition(lineMap, pos).line;
-    }
-    ts.getLineOfLocalPositionFromLineMap = getLineOfLocalPositionFromLineMap;
-    function getFirstConstructorWithBody(node) {
-        return ts.forEach(node.members, function (member) {
-            if (member.kind === 148 && nodeIsPresent(member.body)) {
-                return member;
-            }
-        });
-    }
-    ts.getFirstConstructorWithBody = getFirstConstructorWithBody;
-    function getSetAccessorTypeAnnotationNode(accessor) {
-        if (accessor && accessor.parameters.length > 0) {
-            var hasThis = accessor.parameters.length === 2 &&
-                accessor.parameters[0].name.kind === 69 &&
-                accessor.parameters[0].name.originalKeywordKind === 97;
-            return accessor.parameters[hasThis ? 1 : 0].type;
-        }
-    }
-    ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
-    function getAllAccessorDeclarations(declarations, accessor) {
-        var firstAccessor;
-        var secondAccessor;
-        var getAccessor;
-        var setAccessor;
-        if (hasDynamicName(accessor)) {
-            firstAccessor = accessor;
-            if (accessor.kind === 149) {
-                getAccessor = accessor;
-            }
-            else if (accessor.kind === 150) {
-                setAccessor = accessor;
-            }
-            else {
-                ts.Debug.fail("Accessor has wrong kind");
-            }
-        }
-        else {
-            ts.forEach(declarations, function (member) {
-                if ((member.kind === 149 || member.kind === 150)
-                    && (member.flags & 32) === (accessor.flags & 32)) {
-                    var memberName = getPropertyNameForPropertyNameNode(member.name);
-                    var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
-                    if (memberName === accessorName) {
-                        if (!firstAccessor) {
-                            firstAccessor = member;
-                        }
-                        else if (!secondAccessor) {
-                            secondAccessor = member;
-                        }
-                        if (member.kind === 149 && !getAccessor) {
-                            getAccessor = member;
-                        }
-                        if (member.kind === 150 && !setAccessor) {
-                            setAccessor = member;
-                        }
-                    }
-                }
-            });
-        }
-        return {
-            firstAccessor: firstAccessor,
-            secondAccessor: secondAccessor,
-            getAccessor: getAccessor,
-            setAccessor: setAccessor
-        };
-    }
-    ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
-    function emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments) {
-        if (leadingComments && leadingComments.length && node.pos !== leadingComments[0].pos &&
-            getLineOfLocalPositionFromLineMap(lineMap, node.pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
-            writer.writeLine();
-        }
-    }
-    ts.emitNewLineBeforeLeadingComments = emitNewLineBeforeLeadingComments;
-    function emitComments(text, lineMap, writer, comments, trailingSeparator, newLine, writeComment) {
-        var emitLeadingSpace = !trailingSeparator;
-        ts.forEach(comments, function (comment) {
-            if (emitLeadingSpace) {
-                writer.write(" ");
-                emitLeadingSpace = false;
-            }
-            writeComment(text, lineMap, writer, comment, newLine);
-            if (comment.hasTrailingNewLine) {
-                writer.writeLine();
-            }
-            else if (trailingSeparator) {
-                writer.write(" ");
-            }
-            else {
-                emitLeadingSpace = true;
-            }
-        });
-    }
-    ts.emitComments = emitComments;
-    function emitDetachedComments(text, lineMap, writer, writeComment, node, newLine, removeComments) {
-        var leadingComments;
-        var currentDetachedCommentInfo;
-        if (removeComments) {
-            if (node.pos === 0) {
-                leadingComments = ts.filter(ts.getLeadingCommentRanges(text, node.pos), isPinnedComment);
-            }
-        }
-        else {
-            leadingComments = ts.getLeadingCommentRanges(text, node.pos);
-        }
-        if (leadingComments) {
-            var detachedComments = [];
-            var lastComment = void 0;
-            for (var _i = 0, leadingComments_1 = leadingComments; _i < leadingComments_1.length; _i++) {
-                var comment = leadingComments_1[_i];
-                if (lastComment) {
-                    var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, lastComment.end);
-                    var commentLine = getLineOfLocalPositionFromLineMap(lineMap, comment.pos);
-                    if (commentLine >= lastCommentLine + 2) {
-                        break;
-                    }
-                }
-                detachedComments.push(comment);
-                lastComment = comment;
-            }
-            if (detachedComments.length) {
-                var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, ts.lastOrUndefined(detachedComments).end);
-                var nodeLine = getLineOfLocalPositionFromLineMap(lineMap, ts.skipTrivia(text, node.pos));
-                if (nodeLine >= lastCommentLine + 2) {
-                    emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments);
-                    emitComments(text, lineMap, writer, detachedComments, true, newLine, writeComment);
-                    currentDetachedCommentInfo = { nodePos: node.pos, detachedCommentEndPos: ts.lastOrUndefined(detachedComments).end };
-                }
-            }
-        }
-        return currentDetachedCommentInfo;
-        function isPinnedComment(comment) {
-            return text.charCodeAt(comment.pos + 1) === 42 &&
-                text.charCodeAt(comment.pos + 2) === 33;
-        }
-    }
-    ts.emitDetachedComments = emitDetachedComments;
-    function writeCommentRange(text, lineMap, writer, comment, newLine) {
-        if (text.charCodeAt(comment.pos + 1) === 42) {
-            var firstCommentLineAndCharacter = ts.computeLineAndCharacterOfPosition(lineMap, comment.pos);
-            var lineCount = lineMap.length;
-            var firstCommentLineIndent = void 0;
-            for (var pos = comment.pos, currentLine = firstCommentLineAndCharacter.line; pos < comment.end; currentLine++) {
-                var nextLineStart = (currentLine + 1) === lineCount
-                    ? text.length + 1
-                    : lineMap[currentLine + 1];
-                if (pos !== comment.pos) {
-                    if (firstCommentLineIndent === undefined) {
-                        firstCommentLineIndent = calculateIndent(text, lineMap[firstCommentLineAndCharacter.line], comment.pos);
-                    }
-                    var currentWriterIndentSpacing = writer.getIndent() * getIndentSize();
-                    var spacesToEmit = currentWriterIndentSpacing - firstCommentLineIndent + calculateIndent(text, pos, nextLineStart);
-                    if (spacesToEmit > 0) {
-                        var numberOfSingleSpacesToEmit = spacesToEmit % getIndentSize();
-                        var indentSizeSpaceString = getIndentString((spacesToEmit - numberOfSingleSpacesToEmit) / getIndentSize());
-                        writer.rawWrite(indentSizeSpaceString);
-                        while (numberOfSingleSpacesToEmit) {
-                            writer.rawWrite(" ");
-                            numberOfSingleSpacesToEmit--;
-                        }
-                    }
-                    else {
-                        writer.rawWrite("");
-                    }
-                }
-                writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart);
-                pos = nextLineStart;
-            }
-        }
-        else {
-            writer.write(text.substring(comment.pos, comment.end));
-        }
-    }
-    ts.writeCommentRange = writeCommentRange;
-    function writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart) {
-        var end = Math.min(comment.end, nextLineStart - 1);
-        var currentLineText = text.substring(pos, end).replace(/^\s+|\s+$/g, "");
-        if (currentLineText) {
-            writer.write(currentLineText);
-            if (end !== comment.end) {
-                writer.writeLine();
-            }
-        }
-        else {
-            writer.writeLiteral(newLine);
-        }
-    }
-    function calculateIndent(text, pos, end) {
-        var currentLineIndent = 0;
-        for (; pos < end && ts.isWhiteSpace(text.charCodeAt(pos)); pos++) {
-            if (text.charCodeAt(pos) === 9) {
-                currentLineIndent += getIndentSize() - (currentLineIndent % getIndentSize());
-            }
-            else {
-                currentLineIndent++;
-            }
-        }
-        return currentLineIndent;
-    }
-    function modifierToFlag(token) {
-        switch (token) {
-            case 113: return 32;
-            case 112: return 4;
-            case 111: return 16;
-            case 110: return 8;
-            case 115: return 128;
-            case 82: return 1;
-            case 122: return 2;
-            case 74: return 2048;
-            case 77: return 512;
-            case 118: return 256;
-            case 128: return 64;
-        }
-        return 0;
-    }
-    ts.modifierToFlag = modifierToFlag;
-    function isLeftHandSideExpression(expr) {
-        if (expr) {
-            switch (expr.kind) {
-                case 172:
-                case 173:
-                case 175:
-                case 174:
-                case 196:
-                case 241:
-                case 242:
-                case 176:
-                case 170:
-                case 178:
-                case 171:
-                case 192:
-                case 179:
-                case 69:
-                case 10:
-                case 8:
-                case 9:
-                case 11:
-                case 189:
-                case 84:
-                case 93:
-                case 97:
-                case 99:
-                case 95:
-                    return true;
-            }
-        }
-        return false;
-    }
-    ts.isLeftHandSideExpression = isLeftHandSideExpression;
-    function isAssignmentOperator(token) {
-        return token >= 56 && token <= 68;
-    }
-    ts.isAssignmentOperator = isAssignmentOperator;
-    function isExpressionWithTypeArgumentsInClassExtendsClause(node) {
-        return node.kind === 194 &&
-            node.parent.token === 83 &&
-            isClassLike(node.parent.parent);
-    }
-    ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
-    function isSupportedExpressionWithTypeArguments(node) {
-        return isSupportedExpressionWithTypeArgumentsRest(node.expression);
-    }
-    ts.isSupportedExpressionWithTypeArguments = isSupportedExpressionWithTypeArguments;
-    function isSupportedExpressionWithTypeArgumentsRest(node) {
-        if (node.kind === 69) {
-            return true;
-        }
-        else if (isPropertyAccessExpression(node)) {
-            return isSupportedExpressionWithTypeArgumentsRest(node.expression);
-        }
-        else {
-            return false;
-        }
-    }
-    function isRightSideOfQualifiedNameOrPropertyAccess(node) {
-        return (node.parent.kind === 139 && node.parent.right === node) ||
-            (node.parent.kind === 172 && node.parent.name === node);
-    }
-    ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
-    function isEmptyObjectLiteralOrArrayLiteral(expression) {
-        var kind = expression.kind;
-        if (kind === 171) {
-            return expression.properties.length === 0;
-        }
-        if (kind === 170) {
-            return expression.elements.length === 0;
-        }
-        return false;
-    }
-    ts.isEmptyObjectLiteralOrArrayLiteral = isEmptyObjectLiteralOrArrayLiteral;
-    function getLocalSymbolForExportDefault(symbol) {
-        return symbol && symbol.valueDeclaration && (symbol.valueDeclaration.flags & 512) ? symbol.valueDeclaration.localSymbol : undefined;
-    }
-    ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
-    function hasJavaScriptFileExtension(fileName) {
-        return ts.forEach(ts.supportedJavascriptExtensions, function (extension) { return ts.fileExtensionIs(fileName, extension); });
-    }
-    ts.hasJavaScriptFileExtension = hasJavaScriptFileExtension;
-    function getExpandedCharCodes(input) {
-        var output = [];
-        var length = input.length;
-        for (var i = 0; i < length; i++) {
-            var charCode = input.charCodeAt(i);
-            if (charCode < 0x80) {
-                output.push(charCode);
-            }
-            else if (charCode < 0x800) {
-                output.push((charCode >> 6) | 192);
-                output.push((charCode & 63) | 128);
-            }
-            else if (charCode < 0x10000) {
-                output.push((charCode >> 12) | 224);
-                output.push(((charCode >> 6) & 63) | 128);
-                output.push((charCode & 63) | 128);
-            }
-            else if (charCode < 0x20000) {
-                output.push((charCode >> 18) | 240);
-                output.push(((charCode >> 12) & 63) | 128);
-                output.push(((charCode >> 6) & 63) | 128);
-                output.push((charCode & 63) | 128);
-            }
-            else {
-                ts.Debug.assert(false, "Unexpected code point");
-            }
-        }
-        return output;
-    }
-    ts.stringify = typeof JSON !== "undefined" && JSON.stringify
-        ? JSON.stringify
-        : stringifyFallback;
-    function stringifyFallback(value) {
-        return value === undefined ? undefined : stringifyValue(value);
-    }
-    function stringifyValue(value) {
-        return typeof value === "string" ? "\"" + escapeString(value) + "\""
-            : typeof value === "number" ? isFinite(value) ? String(value) : "null"
-                : typeof value === "boolean" ? value ? "true" : "false"
-                    : typeof value === "object" && value ? ts.isArray(value) ? cycleCheck(stringifyArray, value) : cycleCheck(stringifyObject, value)
-                        : "null";
-    }
-    function cycleCheck(cb, value) {
-        ts.Debug.assert(!value.hasOwnProperty("__cycle"), "Converting circular structure to JSON");
-        value.__cycle = true;
-        var result = cb(value);
-        delete value.__cycle;
-        return result;
-    }
-    function stringifyArray(value) {
-        return "[" + ts.reduceLeft(value, stringifyElement, "") + "]";
-    }
-    function stringifyElement(memo, value) {
-        return (memo ? memo + "," : memo) + stringifyValue(value);
-    }
-    function stringifyObject(value) {
-        return "{" + ts.reduceProperties(value, stringifyProperty, "") + "}";
-    }
-    function stringifyProperty(memo, value, key) {
-        return value === undefined || typeof value === "function" || key === "__cycle" ? memo
-            : (memo ? memo + "," : memo) + ("\"" + escapeString(key) + "\":" + stringifyValue(value));
-    }
-    var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
-    function convertToBase64(input) {
-        var result = "";
-        var charCodes = getExpandedCharCodes(input);
-        var i = 0;
-        var length = charCodes.length;
-        var byte1, byte2, byte3, byte4;
-        while (i < length) {
-            byte1 = charCodes[i] >> 2;
-            byte2 = (charCodes[i] & 3) << 4 | charCodes[i + 1] >> 4;
-            byte3 = (charCodes[i + 1] & 15) << 2 | charCodes[i + 2] >> 6;
-            byte4 = charCodes[i + 2] & 63;
-            if (i + 1 >= length) {
-                byte3 = byte4 = 64;
-            }
-            else if (i + 2 >= length) {
-                byte4 = 64;
-            }
-            result += base64Digits.charAt(byte1) + base64Digits.charAt(byte2) + base64Digits.charAt(byte3) + base64Digits.charAt(byte4);
-            i += 3;
-        }
-        return result;
-    }
-    ts.convertToBase64 = convertToBase64;
-    function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
-        return !ts.isRootedDiskPath(absoluteOrRelativePath)
-            ? absoluteOrRelativePath
-            : ts.getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, false);
-    }
-    ts.convertToRelativePath = convertToRelativePath;
-    var carriageReturnLineFeed = "\r\n";
-    var lineFeed = "\n";
-    function getNewLineCharacter(options) {
-        if (options.newLine === 0) {
-            return carriageReturnLineFeed;
-        }
-        else if (options.newLine === 1) {
-            return lineFeed;
-        }
-        else if (ts.sys) {
-            return ts.sys.newLine;
-        }
-        return carriageReturnLineFeed;
-    }
-    ts.getNewLineCharacter = getNewLineCharacter;
-    function isWatchSet(options) {
-        return options.watch && options.hasOwnProperty("watch");
-    }
-    ts.isWatchSet = isWatchSet;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getDefaultLibFileName(options) {
-        return options.target === 2 ? "lib.es6.d.ts" : "lib.d.ts";
-    }
-    ts.getDefaultLibFileName = getDefaultLibFileName;
-    function textSpanEnd(span) {
-        return span.start + span.length;
-    }
-    ts.textSpanEnd = textSpanEnd;
-    function textSpanIsEmpty(span) {
-        return span.length === 0;
-    }
-    ts.textSpanIsEmpty = textSpanIsEmpty;
-    function textSpanContainsPosition(span, position) {
-        return position >= span.start && position < textSpanEnd(span);
-    }
-    ts.textSpanContainsPosition = textSpanContainsPosition;
-    function textSpanContainsTextSpan(span, other) {
-        return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
-    }
-    ts.textSpanContainsTextSpan = textSpanContainsTextSpan;
-    function textSpanOverlapsWith(span, other) {
-        var overlapStart = Math.max(span.start, other.start);
-        var overlapEnd = Math.min(textSpanEnd(span), textSpanEnd(other));
-        return overlapStart < overlapEnd;
-    }
-    ts.textSpanOverlapsWith = textSpanOverlapsWith;
-    function textSpanOverlap(span1, span2) {
-        var overlapStart = Math.max(span1.start, span2.start);
-        var overlapEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
-        if (overlapStart < overlapEnd) {
-            return createTextSpanFromBounds(overlapStart, overlapEnd);
-        }
-        return undefined;
-    }
-    ts.textSpanOverlap = textSpanOverlap;
-    function textSpanIntersectsWithTextSpan(span, other) {
-        return other.start <= textSpanEnd(span) && textSpanEnd(other) >= span.start;
-    }
-    ts.textSpanIntersectsWithTextSpan = textSpanIntersectsWithTextSpan;
-    function textSpanIntersectsWith(span, start, length) {
-        var end = start + length;
-        return start <= textSpanEnd(span) && end >= span.start;
-    }
-    ts.textSpanIntersectsWith = textSpanIntersectsWith;
-    function decodedTextSpanIntersectsWith(start1, length1, start2, length2) {
-        var end1 = start1 + length1;
-        var end2 = start2 + length2;
-        return start2 <= end1 && end2 >= start1;
-    }
-    ts.decodedTextSpanIntersectsWith = decodedTextSpanIntersectsWith;
-    function textSpanIntersectsWithPosition(span, position) {
-        return position <= textSpanEnd(span) && position >= span.start;
-    }
-    ts.textSpanIntersectsWithPosition = textSpanIntersectsWithPosition;
-    function textSpanIntersection(span1, span2) {
-        var intersectStart = Math.max(span1.start, span2.start);
-        var intersectEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
-        if (intersectStart <= intersectEnd) {
-            return createTextSpanFromBounds(intersectStart, intersectEnd);
-        }
-        return undefined;
-    }
-    ts.textSpanIntersection = textSpanIntersection;
-    function createTextSpan(start, length) {
-        if (start < 0) {
-            throw new Error("start < 0");
-        }
-        if (length < 0) {
-            throw new Error("length < 0");
-        }
-        return { start: start, length: length };
-    }
-    ts.createTextSpan = createTextSpan;
-    function createTextSpanFromBounds(start, end) {
-        return createTextSpan(start, end - start);
-    }
-    ts.createTextSpanFromBounds = createTextSpanFromBounds;
-    function textChangeRangeNewSpan(range) {
-        return createTextSpan(range.span.start, range.newLength);
-    }
-    ts.textChangeRangeNewSpan = textChangeRangeNewSpan;
-    function textChangeRangeIsUnchanged(range) {
-        return textSpanIsEmpty(range.span) && range.newLength === 0;
-    }
-    ts.textChangeRangeIsUnchanged = textChangeRangeIsUnchanged;
-    function createTextChangeRange(span, newLength) {
-        if (newLength < 0) {
-            throw new Error("newLength < 0");
-        }
-        return { span: span, newLength: newLength };
-    }
-    ts.createTextChangeRange = createTextChangeRange;
-    ts.unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
-    function collapseTextChangeRangesAcrossMultipleVersions(changes) {
-        if (changes.length === 0) {
-            return ts.unchangedTextChangeRange;
-        }
-        if (changes.length === 1) {
-            return changes[0];
-        }
-        var change0 = changes[0];
-        var oldStartN = change0.span.start;
-        var oldEndN = textSpanEnd(change0.span);
-        var newEndN = oldStartN + change0.newLength;
-        for (var i = 1; i < changes.length; i++) {
-            var nextChange = changes[i];
-            var oldStart1 = oldStartN;
-            var oldEnd1 = oldEndN;
-            var newEnd1 = newEndN;
-            var oldStart2 = nextChange.span.start;
-            var oldEnd2 = textSpanEnd(nextChange.span);
-            var newEnd2 = oldStart2 + nextChange.newLength;
-            oldStartN = Math.min(oldStart1, oldStart2);
-            oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
-            newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
-        }
-        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), newEndN - oldStartN);
-    }
-    ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
-    function getTypeParameterOwner(d) {
-        if (d && d.kind === 141) {
-            for (var current = d; current; current = current.parent) {
-                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 222) {
-                    return current;
-                }
-            }
-        }
-    }
-    ts.getTypeParameterOwner = getTypeParameterOwner;
-    function isParameterPropertyDeclaration(node) {
-        return node.flags & 92 && node.parent.kind === 148 && ts.isClassLike(node.parent.parent);
-    }
-    ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
-    function startsWith(str, prefix) {
-        return str.lastIndexOf(prefix, 0) === 0;
-    }
-    ts.startsWith = startsWith;
-    function endsWith(str, suffix) {
-        var expectedPos = str.length - suffix.length;
-        return str.indexOf(suffix, expectedPos) === expectedPos;
-    }
-    ts.endsWith = endsWith;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.parseTime = 0;
-    var NodeConstructor;
-    var SourceFileConstructor;
-    function createNode(kind, pos, end) {
-        if (kind === 256) {
-            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
-        }
-        else {
-            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
-        }
-    }
-    ts.createNode = createNode;
-    function visitNode(cbNode, node) {
-        if (node) {
-            return cbNode(node);
-        }
-    }
-    function visitNodeArray(cbNodes, nodes) {
-        if (nodes) {
-            return cbNodes(nodes);
-        }
-    }
-    function visitEachNode(cbNode, nodes) {
-        if (nodes) {
-            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
-                var node = nodes_1[_i];
-                var result = cbNode(node);
-                if (result) {
-                    return result;
-                }
-            }
-        }
-    }
-    function forEachChild(node, cbNode, cbNodeArray) {
-        if (!node) {
-            return;
-        }
-        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
-        var cbNodes = cbNodeArray || cbNode;
-        switch (node.kind) {
-            case 139:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.right);
-            case 141:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.constraint) ||
-                    visitNode(cbNode, node.expression);
-            case 254:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.equalsToken) ||
-                    visitNode(cbNode, node.objectAssignmentInitializer);
-            case 142:
-            case 145:
-            case 144:
-            case 253:
-            case 218:
-            case 169:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.dotDotDotToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.initializer);
-            case 156:
-            case 157:
-            case 151:
-            case 152:
-            case 153:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 147:
-            case 146:
-            case 148:
-            case 149:
-            case 150:
-            case 179:
-            case 220:
-            case 180:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.equalsGreaterThanToken) ||
-                    visitNode(cbNode, node.body);
-            case 155:
-                return visitNode(cbNode, node.typeName) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 154:
-                return visitNode(cbNode, node.parameterName) ||
-                    visitNode(cbNode, node.type);
-            case 158:
-                return visitNode(cbNode, node.exprName);
-            case 159:
-                return visitNodes(cbNodes, node.members);
-            case 160:
-                return visitNode(cbNode, node.elementType);
-            case 161:
-                return visitNodes(cbNodes, node.elementTypes);
-            case 162:
-            case 163:
-                return visitNodes(cbNodes, node.types);
-            case 164:
-                return visitNode(cbNode, node.type);
-            case 167:
-            case 168:
-                return visitNodes(cbNodes, node.elements);
-            case 170:
-                return visitNodes(cbNodes, node.elements);
-            case 171:
-                return visitNodes(cbNodes, node.properties);
-            case 172:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.dotToken) ||
-                    visitNode(cbNode, node.name);
-            case 173:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.argumentExpression);
-            case 174:
-            case 175:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments) ||
-                    visitNodes(cbNodes, node.arguments);
-            case 176:
-                return visitNode(cbNode, node.tag) ||
-                    visitNode(cbNode, node.template);
-            case 177:
-                return visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.expression);
-            case 178:
-                return visitNode(cbNode, node.expression);
-            case 181:
-                return visitNode(cbNode, node.expression);
-            case 182:
-                return visitNode(cbNode, node.expression);
-            case 183:
-                return visitNode(cbNode, node.expression);
-            case 185:
-                return visitNode(cbNode, node.operand);
-            case 190:
-                return visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.expression);
-            case 184:
-                return visitNode(cbNode, node.expression);
-            case 186:
-                return visitNode(cbNode, node.operand);
-            case 187:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.operatorToken) ||
-                    visitNode(cbNode, node.right);
-            case 195:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.type);
-            case 196:
-                return visitNode(cbNode, node.expression);
-            case 188:
-                return visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.whenTrue) ||
-                    visitNode(cbNode, node.colonToken) ||
-                    visitNode(cbNode, node.whenFalse);
-            case 191:
-                return visitNode(cbNode, node.expression);
-            case 199:
-            case 226:
-                return visitNodes(cbNodes, node.statements);
-            case 256:
-                return visitNodes(cbNodes, node.statements) ||
-                    visitNode(cbNode, node.endOfFileToken);
-            case 200:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.declarationList);
-            case 219:
-                return visitNodes(cbNodes, node.declarations);
-            case 202:
-                return visitNode(cbNode, node.expression);
-            case 203:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.thenStatement) ||
-                    visitNode(cbNode, node.elseStatement);
-            case 204:
-                return visitNode(cbNode, node.statement) ||
-                    visitNode(cbNode, node.expression);
-            case 205:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 206:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.incrementor) ||
-                    visitNode(cbNode, node.statement);
-            case 207:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 208:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 209:
-            case 210:
-                return visitNode(cbNode, node.label);
-            case 211:
-                return visitNode(cbNode, node.expression);
-            case 212:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 213:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.caseBlock);
-            case 227:
-                return visitNodes(cbNodes, node.clauses);
-            case 249:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.statements);
-            case 250:
-                return visitNodes(cbNodes, node.statements);
-            case 214:
-                return visitNode(cbNode, node.label) ||
-                    visitNode(cbNode, node.statement);
-            case 215:
-                return visitNode(cbNode, node.expression);
-            case 216:
-                return visitNode(cbNode, node.tryBlock) ||
-                    visitNode(cbNode, node.catchClause) ||
-                    visitNode(cbNode, node.finallyBlock);
-            case 252:
-                return visitNode(cbNode, node.variableDeclaration) ||
-                    visitNode(cbNode, node.block);
-            case 143:
-                return visitNode(cbNode, node.expression);
-            case 221:
-            case 192:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 222:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 223:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNode(cbNode, node.type);
-            case 224:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.members);
-            case 255:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 225:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.body);
-            case 229:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.moduleReference);
-            case 230:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.importClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 231:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.namedBindings);
-            case 228:
-                return visitNode(cbNode, node.name);
-            case 232:
-                return visitNode(cbNode, node.name);
-            case 233:
-            case 237:
-                return visitNodes(cbNodes, node.elements);
-            case 236:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.exportClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 234:
-            case 238:
-                return visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.name);
-            case 235:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.expression);
-            case 189:
-                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
-            case 197:
-                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
-            case 140:
-                return visitNode(cbNode, node.expression);
-            case 251:
-                return visitNodes(cbNodes, node.types);
-            case 194:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 240:
-                return visitNode(cbNode, node.expression);
-            case 239:
-                return visitNodes(cbNodes, node.decorators);
-            case 241:
-                return visitNode(cbNode, node.openingElement) ||
-                    visitNodes(cbNodes, node.children) ||
-                    visitNode(cbNode, node.closingElement);
-            case 242:
-            case 243:
-                return visitNode(cbNode, node.tagName) ||
-                    visitNodes(cbNodes, node.attributes);
-            case 246:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 247:
-                return visitNode(cbNode, node.expression);
-            case 248:
-                return visitNode(cbNode, node.expression);
-            case 245:
-                return visitNode(cbNode, node.tagName);
-            case 257:
-                return visitNode(cbNode, node.type);
-            case 261:
-                return visitNodes(cbNodes, node.types);
-            case 262:
-                return visitNodes(cbNodes, node.types);
-            case 260:
-                return visitNode(cbNode, node.elementType);
-            case 264:
-                return visitNode(cbNode, node.type);
-            case 263:
-                return visitNode(cbNode, node.type);
-            case 265:
-                return visitNodes(cbNodes, node.members);
-            case 267:
-                return visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 268:
-                return visitNode(cbNode, node.type);
-            case 269:
-                return visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 270:
-                return visitNode(cbNode, node.type);
-            case 271:
-                return visitNode(cbNode, node.type);
-            case 272:
-                return visitNode(cbNode, node.type);
-            case 266:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.type);
-            case 273:
-                return visitNodes(cbNodes, node.tags);
-            case 275:
-                return visitNode(cbNode, node.preParameterName) ||
-                    visitNode(cbNode, node.typeExpression) ||
-                    visitNode(cbNode, node.postParameterName);
-            case 276:
-                return visitNode(cbNode, node.typeExpression);
-            case 277:
-                return visitNode(cbNode, node.typeExpression);
-            case 278:
-                return visitNodes(cbNodes, node.typeParameters);
-        }
-    }
-    ts.forEachChild = forEachChild;
-    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
-        if (setParentNodes === void 0) { setParentNodes = false; }
-        var start = new Date().getTime();
-        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, undefined, setParentNodes, scriptKind);
-        ts.parseTime += new Date().getTime() - start;
-        return result;
-    }
-    ts.createSourceFile = createSourceFile;
-    function isExternalModule(file) {
-        return file.externalModuleIndicator !== undefined;
-    }
-    ts.isExternalModule = isExternalModule;
-    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-        return IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
-    }
-    ts.updateSourceFile = updateSourceFile;
-    function parseIsolatedJSDocComment(content, start, length) {
-        return Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
-    }
-    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-    function parseJSDocTypeExpressionForTests(content, start, length) {
-        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
-    }
-    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-    var Parser;
-    (function (Parser) {
-        var scanner = ts.createScanner(2, true);
-        var disallowInAndDecoratorContext = 4194304 | 16777216;
-        var NodeConstructor;
-        var SourceFileConstructor;
-        var sourceFile;
-        var parseDiagnostics;
-        var syntaxCursor;
-        var token;
-        var sourceText;
-        var nodeCount;
-        var identifiers;
-        var identifierCount;
-        var parsingContext;
-        var contextFlags;
-        var parseErrorBeforeNextFinishedNode = false;
-        function parseSourceFile(fileName, _sourceText, languageVersion, _syntaxCursor, setParentNodes, scriptKind) {
-            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
-            initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind);
-            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
-            clearState();
-            return result;
-        }
-        Parser.parseSourceFile = parseSourceFile;
-        function getLanguageVariant(scriptKind) {
-            return scriptKind === 4 || scriptKind === 2 || scriptKind === 1 ? 1 : 0;
-        }
-        function initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind) {
-            NodeConstructor = ts.objectAllocator.getNodeConstructor();
-            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
-            sourceText = _sourceText;
-            syntaxCursor = _syntaxCursor;
-            parseDiagnostics = [];
-            parsingContext = 0;
-            identifiers = {};
-            identifierCount = 0;
-            nodeCount = 0;
-            contextFlags = scriptKind === 1 || scriptKind === 2 ? 134217728 : 0;
-            parseErrorBeforeNextFinishedNode = false;
-            scanner.setText(sourceText);
-            scanner.setOnError(scanError);
-            scanner.setScriptTarget(languageVersion);
-            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
-        }
-        function clearState() {
-            scanner.setText("");
-            scanner.setOnError(undefined);
-            parseDiagnostics = undefined;
-            sourceFile = undefined;
-            identifiers = undefined;
-            syntaxCursor = undefined;
-            sourceText = undefined;
-        }
-        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
-            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
-            sourceFile.flags = contextFlags;
-            token = nextToken();
-            processReferenceComments(sourceFile);
-            sourceFile.statements = parseList(0, parseStatement);
-            ts.Debug.assert(token === 1);
-            sourceFile.endOfFileToken = parseTokenNode();
-            setExternalModuleIndicator(sourceFile);
-            sourceFile.nodeCount = nodeCount;
-            sourceFile.identifierCount = identifierCount;
-            sourceFile.identifiers = identifiers;
-            sourceFile.parseDiagnostics = parseDiagnostics;
-            if (setParentNodes) {
-                fixupParentReferences(sourceFile);
-            }
-            return sourceFile;
-        }
-        function addJSDocComment(node) {
-            if (contextFlags & 134217728) {
-                var comments = ts.getLeadingCommentRangesOfNode(node, sourceFile);
-                if (comments) {
-                    for (var _i = 0, comments_1 = comments; _i < comments_1.length; _i++) {
-                        var comment = comments_1[_i];
-                        var jsDocComment = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
-                        if (jsDocComment) {
-                            node.jsDocComment = jsDocComment;
-                        }
-                    }
-                }
-            }
-            return node;
-        }
-        function fixupParentReferences(sourceFile) {
-            var parent = sourceFile;
-            forEachChild(sourceFile, visitNode);
-            return;
-            function visitNode(n) {
-                if (n.parent !== parent) {
-                    n.parent = parent;
-                    var saveParent = parent;
-                    parent = n;
-                    forEachChild(n, visitNode);
-                    parent = saveParent;
-                }
-            }
-        }
-        Parser.fixupParentReferences = fixupParentReferences;
-        function createSourceFile(fileName, languageVersion, scriptKind) {
-            var sourceFile = new SourceFileConstructor(256, 0, sourceText.length);
-            nodeCount++;
-            sourceFile.text = sourceText;
-            sourceFile.bindDiagnostics = [];
-            sourceFile.languageVersion = languageVersion;
-            sourceFile.fileName = ts.normalizePath(fileName);
-            sourceFile.languageVariant = getLanguageVariant(scriptKind);
-            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts");
-            sourceFile.scriptKind = scriptKind;
-            return sourceFile;
-        }
-        function setContextFlag(val, flag) {
-            if (val) {
-                contextFlags |= flag;
-            }
-            else {
-                contextFlags &= ~flag;
-            }
-        }
-        function setDisallowInContext(val) {
-            setContextFlag(val, 4194304);
-        }
-        function setYieldContext(val) {
-            setContextFlag(val, 8388608);
-        }
-        function setDecoratorContext(val) {
-            setContextFlag(val, 16777216);
-        }
-        function setAwaitContext(val) {
-            setContextFlag(val, 33554432);
-        }
-        function doOutsideOfContext(context, func) {
-            var contextFlagsToClear = context & contextFlags;
-            if (contextFlagsToClear) {
-                setContextFlag(false, contextFlagsToClear);
-                var result = func();
-                setContextFlag(true, contextFlagsToClear);
-                return result;
-            }
-            return func();
-        }
-        function doInsideOfContext(context, func) {
-            var contextFlagsToSet = context & ~contextFlags;
-            if (contextFlagsToSet) {
-                setContextFlag(true, contextFlagsToSet);
-                var result = func();
-                setContextFlag(false, contextFlagsToSet);
-                return result;
-            }
-            return func();
-        }
-        function allowInAnd(func) {
-            return doOutsideOfContext(4194304, func);
-        }
-        function disallowInAnd(func) {
-            return doInsideOfContext(4194304, func);
-        }
-        function doInYieldContext(func) {
-            return doInsideOfContext(8388608, func);
-        }
-        function doInDecoratorContext(func) {
-            return doInsideOfContext(16777216, func);
-        }
-        function doInAwaitContext(func) {
-            return doInsideOfContext(33554432, func);
-        }
-        function doOutsideOfAwaitContext(func) {
-            return doOutsideOfContext(33554432, func);
-        }
-        function doInYieldAndAwaitContext(func) {
-            return doInsideOfContext(8388608 | 33554432, func);
-        }
-        function inContext(flags) {
-            return (contextFlags & flags) !== 0;
-        }
-        function inYieldContext() {
-            return inContext(8388608);
-        }
-        function inDisallowInContext() {
-            return inContext(4194304);
-        }
-        function inDecoratorContext() {
-            return inContext(16777216);
-        }
-        function inAwaitContext() {
-            return inContext(33554432);
-        }
-        function parseErrorAtCurrentToken(message, arg0) {
-            var start = scanner.getTokenPos();
-            var length = scanner.getTextPos() - start;
-            parseErrorAtPosition(start, length, message, arg0);
-        }
-        function parseErrorAtPosition(start, length, message, arg0) {
-            var lastError = ts.lastOrUndefined(parseDiagnostics);
-            if (!lastError || start !== lastError.start) {
-                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
-            }
-            parseErrorBeforeNextFinishedNode = true;
-        }
-        function scanError(message, length) {
-            var pos = scanner.getTextPos();
-            parseErrorAtPosition(pos, length || 0, message);
-        }
-        function getNodePos() {
-            return scanner.getStartPos();
-        }
-        function getNodeEnd() {
-            return scanner.getStartPos();
-        }
-        function nextToken() {
-            return token = scanner.scan();
-        }
-        function reScanGreaterToken() {
-            return token = scanner.reScanGreaterToken();
-        }
-        function reScanSlashToken() {
-            return token = scanner.reScanSlashToken();
-        }
-        function reScanTemplateToken() {
-            return token = scanner.reScanTemplateToken();
-        }
-        function scanJsxIdentifier() {
-            return token = scanner.scanJsxIdentifier();
-        }
-        function scanJsxText() {
-            return token = scanner.scanJsxToken();
-        }
-        function speculationHelper(callback, isLookAhead) {
-            var saveToken = token;
-            var saveParseDiagnosticsLength = parseDiagnostics.length;
-            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-            var saveContextFlags = contextFlags;
-            var result = isLookAhead
-                ? scanner.lookAhead(callback)
-                : scanner.tryScan(callback);
-            ts.Debug.assert(saveContextFlags === contextFlags);
-            if (!result || isLookAhead) {
-                token = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-            }
-            return result;
-        }
-        function lookAhead(callback) {
-            return speculationHelper(callback, true);
-        }
-        function tryParse(callback) {
-            return speculationHelper(callback, false);
-        }
-        function isIdentifier() {
-            if (token === 69) {
-                return true;
-            }
-            if (token === 114 && inYieldContext()) {
-                return false;
-            }
-            if (token === 119 && inAwaitContext()) {
-                return false;
-            }
-            return token > 105;
-        }
-        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
-            if (shouldAdvance === void 0) { shouldAdvance = true; }
-            if (token === kind) {
-                if (shouldAdvance) {
-                    nextToken();
-                }
-                return true;
-            }
-            if (diagnosticMessage) {
-                parseErrorAtCurrentToken(diagnosticMessage);
-            }
-            else {
-                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
-            }
-            return false;
-        }
-        function parseOptional(t) {
-            if (token === t) {
-                nextToken();
-                return true;
-            }
-            return false;
-        }
-        function parseOptionalToken(t) {
-            if (token === t) {
-                return parseTokenNode();
-            }
-            return undefined;
-        }
-        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            return parseOptionalToken(t) ||
-                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
-        }
-        function parseTokenNode() {
-            var node = createNode(token);
-            nextToken();
-            return finishNode(node);
-        }
-        function canParseSemicolon() {
-            if (token === 23) {
-                return true;
-            }
-            return token === 16 || token === 1 || scanner.hasPrecedingLineBreak();
-        }
-        function parseSemicolon() {
-            if (canParseSemicolon()) {
-                if (token === 23) {
-                    nextToken();
-                }
-                return true;
-            }
-            else {
-                return parseExpected(23);
-            }
-        }
-        function createNode(kind, pos) {
-            nodeCount++;
-            if (!(pos >= 0)) {
-                pos = scanner.getStartPos();
-            }
-            return new NodeConstructor(kind, pos, pos);
-        }
-        function finishNode(node, end) {
-            node.end = end === undefined ? scanner.getStartPos() : end;
-            if (contextFlags) {
-                node.flags |= contextFlags;
-            }
-            if (parseErrorBeforeNextFinishedNode) {
-                parseErrorBeforeNextFinishedNode = false;
-                node.flags |= 67108864;
-            }
-            return node;
-        }
-        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            if (reportAtCurrentPosition) {
-                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
-            }
-            else {
-                parseErrorAtCurrentToken(diagnosticMessage, arg0);
-            }
-            var result = createNode(kind, scanner.getStartPos());
-            result.text = "";
-            return finishNode(result);
-        }
-        function internIdentifier(text) {
-            text = ts.escapeIdentifier(text);
-            return ts.hasProperty(identifiers, text) ? identifiers[text] : (identifiers[text] = text);
-        }
-        function createIdentifier(isIdentifier, diagnosticMessage) {
-            identifierCount++;
-            if (isIdentifier) {
-                var node = createNode(69);
-                if (token !== 69) {
-                    node.originalKeywordKind = token;
-                }
-                node.text = internIdentifier(scanner.getTokenValue());
-                nextToken();
-                return finishNode(node);
-            }
-            return createMissingNode(69, false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
-        }
-        function parseIdentifier(diagnosticMessage) {
-            return createIdentifier(isIdentifier(), diagnosticMessage);
-        }
-        function parseIdentifierName() {
-            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token));
-        }
-        function isLiteralPropertyName() {
-            return ts.tokenIsIdentifierOrKeyword(token) ||
-                token === 9 ||
-                token === 8;
-        }
-        function parsePropertyNameWorker(allowComputedPropertyNames) {
-            if (token === 9 || token === 8) {
-                return parseLiteralNode(true);
-            }
-            if (allowComputedPropertyNames && token === 19) {
-                return parseComputedPropertyName();
-            }
-            return parseIdentifierName();
-        }
-        function parsePropertyName() {
-            return parsePropertyNameWorker(true);
-        }
-        function parseSimplePropertyName() {
-            return parsePropertyNameWorker(false);
-        }
-        function isSimplePropertyName() {
-            return token === 9 || token === 8 || ts.tokenIsIdentifierOrKeyword(token);
-        }
-        function parseComputedPropertyName() {
-            var node = createNode(140);
-            parseExpected(19);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(20);
-            return finishNode(node);
-        }
-        function parseContextualModifier(t) {
-            return token === t && tryParse(nextTokenCanFollowModifier);
-        }
-        function nextTokenIsOnSameLineAndCanFollowModifier() {
-            nextToken();
-            if (scanner.hasPrecedingLineBreak()) {
-                return false;
-            }
-            return canFollowModifier();
-        }
-        function nextTokenCanFollowModifier() {
-            if (token === 74) {
-                return nextToken() === 81;
-            }
-            if (token === 82) {
-                nextToken();
-                if (token === 77) {
-                    return lookAhead(nextTokenIsClassOrFunction);
-                }
-                return token !== 37 && token !== 116 && token !== 15 && canFollowModifier();
-            }
-            if (token === 77) {
-                return nextTokenIsClassOrFunction();
-            }
-            if (token === 113) {
-                nextToken();
-                return canFollowModifier();
-            }
-            return nextTokenIsOnSameLineAndCanFollowModifier();
-        }
-        function parseAnyContextualModifier() {
-            return ts.isModifierKind(token) && tryParse(nextTokenCanFollowModifier);
-        }
-        function canFollowModifier() {
-            return token === 19
-                || token === 15
-                || token === 37
-                || isLiteralPropertyName();
-        }
-        function nextTokenIsClassOrFunction() {
-            nextToken();
-            return token === 73 || token === 87;
-        }
-        function isListElement(parsingContext, inErrorRecovery) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return true;
-            }
-            switch (parsingContext) {
-                case 0:
-                case 1:
-                case 3:
-                    return !(token === 23 && inErrorRecovery) && isStartOfStatement();
-                case 2:
-                    return token === 71 || token === 77;
-                case 4:
-                    return lookAhead(isTypeMemberStart);
-                case 5:
-                    return lookAhead(isClassMemberStart) || (token === 23 && !inErrorRecovery);
-                case 6:
-                    return token === 19 || isLiteralPropertyName();
-                case 12:
-                    return token === 19 || token === 37 || isLiteralPropertyName();
-                case 9:
-                    return token === 19 || isLiteralPropertyName();
-                case 7:
-                    if (token === 15) {
-                        return lookAhead(isValidHeritageClauseObjectLiteral);
-                    }
-                    if (!inErrorRecovery) {
-                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
-                    }
-                    else {
-                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
-                    }
-                case 8:
-                    return isIdentifierOrPattern();
-                case 10:
-                    return token === 24 || token === 22 || isIdentifierOrPattern();
-                case 17:
-                    return isIdentifier();
-                case 11:
-                case 15:
-                    return token === 24 || token === 22 || isStartOfExpression();
-                case 16:
-                    return isStartOfParameter();
-                case 18:
-                case 19:
-                    return token === 24 || isStartOfType();
-                case 20:
-                    return isHeritageClause();
-                case 21:
-                    return ts.tokenIsIdentifierOrKeyword(token);
-                case 13:
-                    return ts.tokenIsIdentifierOrKeyword(token) || token === 15;
-                case 14:
-                    return true;
-                case 22:
-                case 23:
-                case 25:
-                    return JSDocParser.isJSDocType();
-                case 24:
-                    return isSimplePropertyName();
-            }
-            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
-        }
-        function isValidHeritageClauseObjectLiteral() {
-            ts.Debug.assert(token === 15);
-            if (nextToken() === 16) {
-                var next = nextToken();
-                return next === 24 || next === 15 || next === 83 || next === 106;
-            }
-            return true;
-        }
-        function nextTokenIsIdentifier() {
-            nextToken();
-            return isIdentifier();
-        }
-        function nextTokenIsIdentifierOrKeyword() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token);
-        }
-        function isHeritageClauseExtendsOrImplementsKeyword() {
-            if (token === 106 ||
-                token === 83) {
-                return lookAhead(nextTokenIsStartOfExpression);
-            }
-            return false;
-        }
-        function nextTokenIsStartOfExpression() {
-            nextToken();
-            return isStartOfExpression();
-        }
-        function isListTerminator(kind) {
-            if (token === 1) {
-                return true;
-            }
-            switch (kind) {
-                case 1:
-                case 2:
-                case 4:
-                case 5:
-                case 6:
-                case 12:
-                case 9:
-                case 21:
-                    return token === 16;
-                case 3:
-                    return token === 16 || token === 71 || token === 77;
-                case 7:
-                    return token === 15 || token === 83 || token === 106;
-                case 8:
-                    return isVariableDeclaratorListTerminator();
-                case 17:
-                    return token === 27 || token === 17 || token === 15 || token === 83 || token === 106;
-                case 11:
-                    return token === 18 || token === 23;
-                case 15:
-                case 19:
-                case 10:
-                    return token === 20;
-                case 16:
-                    return token === 18 || token === 20;
-                case 18:
-                    return token === 27 || token === 17;
-                case 20:
-                    return token === 15 || token === 16;
-                case 13:
-                    return token === 27 || token === 39;
-                case 14:
-                    return token === 25 && lookAhead(nextTokenIsSlash);
-                case 22:
-                    return token === 18 || token === 54 || token === 16;
-                case 23:
-                    return token === 27 || token === 16;
-                case 25:
-                    return token === 20 || token === 16;
-                case 24:
-                    return token === 16;
-            }
-        }
-        function isVariableDeclaratorListTerminator() {
-            if (canParseSemicolon()) {
-                return true;
-            }
-            if (isInOrOfKeyword(token)) {
-                return true;
-            }
-            if (token === 34) {
-                return true;
-            }
-            return false;
-        }
-        function isInSomeParsingContext() {
-            for (var kind = 0; kind < 26; kind++) {
-                if (parsingContext & (1 << kind)) {
-                    if (isListElement(kind, true) || isListTerminator(kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function parseList(kind, parseElement) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = [];
-            result.pos = getNodePos();
-            while (!isListTerminator(kind)) {
-                if (isListElement(kind, false)) {
-                    var element = parseListElement(kind, parseElement);
-                    result.push(element);
-                    continue;
-                }
-                if (abortParsingListOrMoveToNextToken(kind)) {
-                    break;
-                }
-            }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function parseListElement(parsingContext, parseElement) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return consumeNode(node);
-            }
-            return parseElement();
-        }
-        function currentNode(parsingContext) {
-            if (parseErrorBeforeNextFinishedNode) {
-                return undefined;
-            }
-            if (!syntaxCursor) {
-                return undefined;
-            }
-            var node = syntaxCursor.currentNode(scanner.getStartPos());
-            if (ts.nodeIsMissing(node)) {
-                return undefined;
-            }
-            if (node.intersectsChange) {
-                return undefined;
-            }
-            if (ts.containsParseError(node)) {
-                return undefined;
-            }
-            var nodeContextFlags = node.flags & 197132288;
-            if (nodeContextFlags !== contextFlags) {
-                return undefined;
-            }
-            if (!canReuseNode(node, parsingContext)) {
-                return undefined;
-            }
-            return node;
-        }
-        function consumeNode(node) {
-            scanner.setTextPos(node.end);
-            nextToken();
-            return node;
-        }
-        function canReuseNode(node, parsingContext) {
-            switch (parsingContext) {
-                case 5:
-                    return isReusableClassMember(node);
-                case 2:
-                    return isReusableSwitchClause(node);
-                case 0:
-                case 1:
-                case 3:
-                    return isReusableStatement(node);
-                case 6:
-                    return isReusableEnumMember(node);
-                case 4:
-                    return isReusableTypeMember(node);
-                case 8:
-                    return isReusableVariableDeclaration(node);
-                case 16:
-                    return isReusableParameter(node);
-                case 20:
-                case 17:
-                case 19:
-                case 18:
-                case 11:
-                case 12:
-                case 7:
-                case 13:
-                case 14:
-            }
-            return false;
-        }
-        function isReusableClassMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 148:
-                    case 153:
-                    case 149:
-                    case 150:
-                    case 145:
-                    case 198:
-                        return true;
-                    case 147:
-                        var methodDeclaration = node;
-                        var nameIsConstructor = methodDeclaration.name.kind === 69 &&
-                            methodDeclaration.name.originalKeywordKind === 121;
-                        return !nameIsConstructor;
-                }
-            }
-            return false;
-        }
-        function isReusableSwitchClause(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 249:
-                    case 250:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableStatement(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 220:
-                    case 200:
-                    case 199:
-                    case 203:
-                    case 202:
-                    case 215:
-                    case 211:
-                    case 213:
-                    case 210:
-                    case 209:
-                    case 207:
-                    case 208:
-                    case 206:
-                    case 205:
-                    case 212:
-                    case 201:
-                    case 216:
-                    case 214:
-                    case 204:
-                    case 217:
-                    case 230:
-                    case 229:
-                    case 236:
-                    case 235:
-                    case 225:
-                    case 221:
-                    case 222:
-                    case 224:
-                    case 223:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableEnumMember(node) {
-            return node.kind === 255;
-        }
-        function isReusableTypeMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 152:
-                    case 146:
-                    case 153:
-                    case 144:
-                    case 151:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableVariableDeclaration(node) {
-            if (node.kind !== 218) {
-                return false;
-            }
-            var variableDeclarator = node;
-            return variableDeclarator.initializer === undefined;
-        }
-        function isReusableParameter(node) {
-            if (node.kind !== 142) {
-                return false;
-            }
-            var parameter = node;
-            return parameter.initializer === undefined;
-        }
-        function abortParsingListOrMoveToNextToken(kind) {
-            parseErrorAtCurrentToken(parsingContextErrors(kind));
-            if (isInSomeParsingContext()) {
-                return true;
-            }
-            nextToken();
-            return false;
-        }
-        function parsingContextErrors(context) {
-            switch (context) {
-                case 0: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 1: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 2: return ts.Diagnostics.case_or_default_expected;
-                case 3: return ts.Diagnostics.Statement_expected;
-                case 4: return ts.Diagnostics.Property_or_signature_expected;
-                case 5: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
-                case 6: return ts.Diagnostics.Enum_member_expected;
-                case 7: return ts.Diagnostics.Expression_expected;
-                case 8: return ts.Diagnostics.Variable_declaration_expected;
-                case 9: return ts.Diagnostics.Property_destructuring_pattern_expected;
-                case 10: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
-                case 11: return ts.Diagnostics.Argument_expression_expected;
-                case 12: return ts.Diagnostics.Property_assignment_expected;
-                case 15: return ts.Diagnostics.Expression_or_comma_expected;
-                case 16: return ts.Diagnostics.Parameter_declaration_expected;
-                case 17: return ts.Diagnostics.Type_parameter_declaration_expected;
-                case 18: return ts.Diagnostics.Type_argument_expected;
-                case 19: return ts.Diagnostics.Type_expected;
-                case 20: return ts.Diagnostics.Unexpected_token_expected;
-                case 21: return ts.Diagnostics.Identifier_expected;
-                case 13: return ts.Diagnostics.Identifier_expected;
-                case 14: return ts.Diagnostics.Identifier_expected;
-                case 22: return ts.Diagnostics.Parameter_declaration_expected;
-                case 23: return ts.Diagnostics.Type_argument_expected;
-                case 25: return ts.Diagnostics.Type_expected;
-                case 24: return ts.Diagnostics.Property_assignment_expected;
-            }
-        }
-        ;
-        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = [];
-            result.pos = getNodePos();
-            var commaStart = -1;
-            while (true) {
-                if (isListElement(kind, false)) {
-                    result.push(parseListElement(kind, parseElement));
-                    commaStart = scanner.getTokenPos();
-                    if (parseOptional(24)) {
-                        continue;
-                    }
-                    commaStart = -1;
-                    if (isListTerminator(kind)) {
-                        break;
-                    }
-                    parseExpected(24);
-                    if (considerSemicolonAsDelimiter && token === 23 && !scanner.hasPrecedingLineBreak()) {
-                        nextToken();
-                    }
-                    continue;
-                }
-                if (isListTerminator(kind)) {
-                    break;
-                }
-                if (abortParsingListOrMoveToNextToken(kind)) {
-                    break;
-                }
-            }
-            if (commaStart >= 0) {
-                result.hasTrailingComma = true;
-            }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function createMissingList() {
-            var pos = getNodePos();
-            var result = [];
-            result.pos = pos;
-            result.end = pos;
-            return result;
-        }
-        function parseBracketedList(kind, parseElement, open, close) {
-            if (parseExpected(open)) {
-                var result = parseDelimitedList(kind, parseElement);
-                parseExpected(close);
-                return result;
-            }
-            return createMissingList();
-        }
-        function parseEntityName(allowReservedWords, diagnosticMessage) {
-            var entity = parseIdentifier(diagnosticMessage);
-            while (parseOptional(21)) {
-                var node = createNode(139, entity.pos);
-                node.left = entity;
-                node.right = parseRightSideOfDot(allowReservedWords);
-                entity = finishNode(node);
-            }
-            return entity;
-        }
-        function parseRightSideOfDot(allowIdentifierNames) {
-            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token)) {
-                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                if (matchesPattern) {
-                    return createMissingNode(69, true, ts.Diagnostics.Identifier_expected);
-                }
-            }
-            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
-        }
-        function parseTemplateExpression() {
-            var template = createNode(189);
-            template.head = parseTemplateLiteralFragment();
-            ts.Debug.assert(template.head.kind === 12, "Template head has wrong token kind");
-            var templateSpans = [];
-            templateSpans.pos = getNodePos();
-            do {
-                templateSpans.push(parseTemplateSpan());
-            } while (ts.lastOrUndefined(templateSpans).literal.kind === 13);
-            templateSpans.end = getNodeEnd();
-            template.templateSpans = templateSpans;
-            return finishNode(template);
-        }
-        function parseTemplateSpan() {
-            var span = createNode(197);
-            span.expression = allowInAnd(parseExpression);
-            var literal;
-            if (token === 16) {
-                reScanTemplateToken();
-                literal = parseTemplateLiteralFragment();
-            }
-            else {
-                literal = parseExpectedToken(14, false, ts.Diagnostics._0_expected, ts.tokenToString(16));
-            }
-            span.literal = literal;
-            return finishNode(span);
-        }
-        function parseStringLiteralTypeNode() {
-            return parseLiteralLikeNode(166, true);
-        }
-        function parseLiteralNode(internName) {
-            return parseLiteralLikeNode(token, internName);
-        }
-        function parseTemplateLiteralFragment() {
-            return parseLiteralLikeNode(token, false);
-        }
-        function parseLiteralLikeNode(kind, internName) {
-            var node = createNode(kind);
-            var text = scanner.getTokenValue();
-            node.text = internName ? internIdentifier(text) : text;
-            if (scanner.hasExtendedUnicodeEscape()) {
-                node.hasExtendedUnicodeEscape = true;
-            }
-            if (scanner.isUnterminated()) {
-                node.isUnterminated = true;
-            }
-            var tokenPos = scanner.getTokenPos();
-            nextToken();
-            finishNode(node);
-            if (node.kind === 8
-                && sourceText.charCodeAt(tokenPos) === 48
-                && ts.isOctalDigit(sourceText.charCodeAt(tokenPos + 1))) {
-                node.isOctalLiteral = true;
-            }
-            return node;
-        }
-        function parseTypeReference() {
-            var typeName = parseEntityName(false, ts.Diagnostics.Type_expected);
-            var node = createNode(155, typeName.pos);
-            node.typeName = typeName;
-            if (!scanner.hasPrecedingLineBreak() && token === 25) {
-                node.typeArguments = parseBracketedList(18, parseType, 25, 27);
-            }
-            return finishNode(node);
-        }
-        function parseThisTypePredicate(lhs) {
-            nextToken();
-            var node = createNode(154, lhs.pos);
-            node.parameterName = lhs;
-            node.type = parseType();
-            return finishNode(node);
-        }
-        function parseThisTypeNode() {
-            var node = createNode(165);
-            nextToken();
-            return finishNode(node);
-        }
-        function parseTypeQuery() {
-            var node = createNode(158);
-            parseExpected(101);
-            node.exprName = parseEntityName(true);
-            return finishNode(node);
-        }
-        function parseTypeParameter() {
-            var node = createNode(141);
-            node.name = parseIdentifier();
-            if (parseOptional(83)) {
-                if (isStartOfType() || !isStartOfExpression()) {
-                    node.constraint = parseType();
-                }
-                else {
-                    node.expression = parseUnaryExpressionOrHigher();
-                }
-            }
-            return finishNode(node);
-        }
-        function parseTypeParameters() {
-            if (token === 25) {
-                return parseBracketedList(17, parseTypeParameter, 25, 27);
-            }
-        }
-        function parseParameterType() {
-            if (parseOptional(54)) {
-                return parseType();
-            }
-            return undefined;
-        }
-        function isStartOfParameter() {
-            return token === 22 || isIdentifierOrPattern() || ts.isModifierKind(token) || token === 55 || token === 97;
-        }
-        function setModifiers(node, modifiers) {
-            if (modifiers) {
-                node.flags |= modifiers.flags;
-                node.modifiers = modifiers;
-            }
-        }
-        function parseParameter() {
-            var node = createNode(142);
-            if (token === 97) {
-                node.name = createIdentifier(true, undefined);
-                node.type = parseParameterType();
-                return finishNode(node);
-            }
-            node.decorators = parseDecorators();
-            setModifiers(node, parseModifiers());
-            node.dotDotDotToken = parseOptionalToken(22);
-            node.name = parseIdentifierOrPattern();
-            if (ts.getFullWidth(node.name) === 0 && node.flags === 0 && ts.isModifierKind(token)) {
-                nextToken();
-            }
-            node.questionToken = parseOptionalToken(53);
-            node.type = parseParameterType();
-            node.initializer = parseBindingElementInitializer(true);
-            return addJSDocComment(finishNode(node));
-        }
-        function parseBindingElementInitializer(inParameter) {
-            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
-        }
-        function parseParameterInitializer() {
-            return parseInitializer(true);
-        }
-        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
-            var returnTokenRequired = returnToken === 34;
-            signature.typeParameters = parseTypeParameters();
-            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
-            if (returnTokenRequired) {
-                parseExpected(returnToken);
-                signature.type = parseTypeOrTypePredicate();
-            }
-            else if (parseOptional(returnToken)) {
-                signature.type = parseTypeOrTypePredicate();
-            }
-        }
-        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
-            if (parseExpected(17)) {
-                var savedYieldContext = inYieldContext();
-                var savedAwaitContext = inAwaitContext();
-                setYieldContext(yieldContext);
-                setAwaitContext(awaitContext);
-                var result = parseDelimitedList(16, parseParameter);
-                setYieldContext(savedYieldContext);
-                setAwaitContext(savedAwaitContext);
-                if (!parseExpected(18) && requireCompleteParameterList) {
-                    return undefined;
-                }
-                return result;
-            }
-            return requireCompleteParameterList ? undefined : createMissingList();
-        }
-        function parseTypeMemberSemicolon() {
-            if (parseOptional(24)) {
-                return;
-            }
-            parseSemicolon();
-        }
-        function parseSignatureMember(kind) {
-            var node = createNode(kind);
-            if (kind === 152) {
-                parseExpected(92);
-            }
-            fillSignature(54, false, false, false, node);
-            parseTypeMemberSemicolon();
-            return finishNode(node);
-        }
-        function isIndexSignature() {
-            if (token !== 19) {
-                return false;
-            }
-            return lookAhead(isUnambiguouslyIndexSignature);
-        }
-        function isUnambiguouslyIndexSignature() {
-            nextToken();
-            if (token === 22 || token === 20) {
-                return true;
-            }
-            if (ts.isModifierKind(token)) {
-                nextToken();
-                if (isIdentifier()) {
-                    return true;
-                }
-            }
-            else if (!isIdentifier()) {
-                return false;
-            }
-            else {
-                nextToken();
-            }
-            if (token === 54 || token === 24) {
-                return true;
-            }
-            if (token !== 53) {
-                return false;
-            }
-            nextToken();
-            return token === 54 || token === 24 || token === 20;
-        }
-        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(153, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.parameters = parseBracketedList(16, parseParameter, 19, 20);
-            node.type = parseTypeAnnotation();
-            parseTypeMemberSemicolon();
-            return finishNode(node);
-        }
-        function parsePropertyOrMethodSignature(fullStart, modifiers) {
-            var name = parsePropertyName();
-            var questionToken = parseOptionalToken(53);
-            if (token === 17 || token === 25) {
-                var method = createNode(146, fullStart);
-                setModifiers(method, modifiers);
-                method.name = name;
-                method.questionToken = questionToken;
-                fillSignature(54, false, false, false, method);
-                parseTypeMemberSemicolon();
-                return finishNode(method);
-            }
-            else {
-                var property = createNode(144, fullStart);
-                setModifiers(property, modifiers);
-                property.name = name;
-                property.questionToken = questionToken;
-                property.type = parseTypeAnnotation();
-                if (token === 56) {
-                    property.initializer = parseNonParameterInitializer();
-                }
-                parseTypeMemberSemicolon();
-                return finishNode(property);
-            }
-        }
-        function isTypeMemberStart() {
-            var idToken;
-            if (token === 17 || token === 25) {
-                return true;
-            }
-            while (ts.isModifierKind(token)) {
-                idToken = token;
-                nextToken();
-            }
-            if (token === 19) {
-                return true;
-            }
-            if (isLiteralPropertyName()) {
-                idToken = token;
-                nextToken();
-            }
-            if (idToken) {
-                return token === 17 ||
-                    token === 25 ||
-                    token === 53 ||
-                    token === 54 ||
-                    canParseSemicolon();
-            }
-            return false;
-        }
-        function parseTypeMember() {
-            if (token === 17 || token === 25) {
-                return parseSignatureMember(151);
-            }
-            if (token === 92 && lookAhead(isStartOfConstructSignature)) {
-                return parseSignatureMember(152);
-            }
-            var fullStart = getNodePos();
-            var modifiers = parseModifiers();
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, undefined, modifiers);
-            }
-            return parsePropertyOrMethodSignature(fullStart, modifiers);
-        }
-        function isStartOfConstructSignature() {
-            nextToken();
-            return token === 17 || token === 25;
-        }
-        function parseTypeLiteral() {
-            var node = createNode(159);
-            node.members = parseObjectTypeMembers();
-            return finishNode(node);
-        }
-        function parseObjectTypeMembers() {
-            var members;
-            if (parseExpected(15)) {
-                members = parseList(4, parseTypeMember);
-                parseExpected(16);
-            }
-            else {
-                members = createMissingList();
-            }
-            return members;
-        }
-        function parseTupleType() {
-            var node = createNode(161);
-            node.elementTypes = parseBracketedList(19, parseType, 19, 20);
-            return finishNode(node);
-        }
-        function parseParenthesizedType() {
-            var node = createNode(164);
-            parseExpected(17);
-            node.type = parseType();
-            parseExpected(18);
-            return finishNode(node);
-        }
-        function parseFunctionOrConstructorType(kind) {
-            var node = createNode(kind);
-            if (kind === 157) {
-                parseExpected(92);
-            }
-            fillSignature(34, false, false, false, node);
-            return finishNode(node);
-        }
-        function parseKeywordAndNoDot() {
-            var node = parseTokenNode();
-            return token === 21 ? undefined : node;
-        }
-        function parseNonArrayType() {
-            switch (token) {
-                case 117:
-                case 132:
-                case 130:
-                case 120:
-                case 133:
-                case 135:
-                case 127:
-                    var node = tryParse(parseKeywordAndNoDot);
-                    return node || parseTypeReference();
-                case 9:
-                    return parseStringLiteralTypeNode();
-                case 103:
-                case 93:
-                    return parseTokenNode();
-                case 97: {
-                    var thisKeyword = parseThisTypeNode();
-                    if (token === 124 && !scanner.hasPrecedingLineBreak()) {
-                        return parseThisTypePredicate(thisKeyword);
-                    }
-                    else {
-                        return thisKeyword;
-                    }
-                }
-                case 101:
-                    return parseTypeQuery();
-                case 15:
-                    return parseTypeLiteral();
-                case 19:
-                    return parseTupleType();
-                case 17:
-                    return parseParenthesizedType();
-                default:
-                    return parseTypeReference();
-            }
-        }
-        function isStartOfType() {
-            switch (token) {
-                case 117:
-                case 132:
-                case 130:
-                case 120:
-                case 133:
-                case 103:
-                case 135:
-                case 93:
-                case 97:
-                case 101:
-                case 127:
-                case 15:
-                case 19:
-                case 25:
-                case 92:
-                case 9:
-                    return true;
-                case 17:
-                    return lookAhead(isStartOfParenthesizedOrFunctionType);
-                default:
-                    return isIdentifier();
-            }
-        }
-        function isStartOfParenthesizedOrFunctionType() {
-            nextToken();
-            return token === 18 || isStartOfParameter() || isStartOfType();
-        }
-        function parseArrayTypeOrHigher() {
-            var type = parseNonArrayType();
-            while (!scanner.hasPrecedingLineBreak() && parseOptional(19)) {
-                parseExpected(20);
-                var node = createNode(160, type.pos);
-                node.elementType = type;
-                type = finishNode(node);
-            }
-            return type;
-        }
-        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
-            var type = parseConstituentType();
-            if (token === operator) {
-                var types = [type];
-                types.pos = type.pos;
-                while (parseOptional(operator)) {
-                    types.push(parseConstituentType());
-                }
-                types.end = getNodeEnd();
-                var node = createNode(kind, type.pos);
-                node.types = types;
-                type = finishNode(node);
-            }
-            return type;
-        }
-        function parseIntersectionTypeOrHigher() {
-            return parseUnionOrIntersectionType(163, parseArrayTypeOrHigher, 46);
-        }
-        function parseUnionTypeOrHigher() {
-            return parseUnionOrIntersectionType(162, parseIntersectionTypeOrHigher, 47);
-        }
-        function isStartOfFunctionType() {
-            if (token === 25) {
-                return true;
-            }
-            return token === 17 && lookAhead(isUnambiguouslyStartOfFunctionType);
-        }
-        function skipParameterStart() {
-            if (ts.isModifierKind(token)) {
-                parseModifiers();
-            }
-            if (isIdentifier() || token === 97) {
-                nextToken();
-                return true;
-            }
-            if (token === 19 || token === 15) {
-                var previousErrorCount = parseDiagnostics.length;
-                parseIdentifierOrPattern();
-                return previousErrorCount === parseDiagnostics.length;
-            }
-            return false;
-        }
-        function isUnambiguouslyStartOfFunctionType() {
-            nextToken();
-            if (token === 18 || token === 22) {
-                return true;
-            }
-            if (skipParameterStart()) {
-                if (token === 54 || token === 24 ||
-                    token === 53 || token === 56) {
-                    return true;
-                }
-                if (token === 18) {
-                    nextToken();
-                    if (token === 34) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function parseTypeOrTypePredicate() {
-            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
-            var type = parseType();
-            if (typePredicateVariable) {
-                var node = createNode(154, typePredicateVariable.pos);
-                node.parameterName = typePredicateVariable;
-                node.type = type;
-                return finishNode(node);
-            }
-            else {
-                return type;
-            }
-        }
-        function parseTypePredicatePrefix() {
-            var id = parseIdentifier();
-            if (token === 124 && !scanner.hasPrecedingLineBreak()) {
-                nextToken();
-                return id;
-            }
-        }
-        function parseType() {
-            return doOutsideOfContext(41943040, parseTypeWorker);
-        }
-        function parseTypeWorker() {
-            if (isStartOfFunctionType()) {
-                return parseFunctionOrConstructorType(156);
-            }
-            if (token === 92) {
-                return parseFunctionOrConstructorType(157);
-            }
-            return parseUnionTypeOrHigher();
-        }
-        function parseTypeAnnotation() {
-            return parseOptional(54) ? parseType() : undefined;
-        }
-        function isStartOfLeftHandSideExpression() {
-            switch (token) {
-                case 97:
-                case 95:
-                case 93:
-                case 99:
-                case 84:
-                case 8:
-                case 9:
-                case 11:
-                case 12:
-                case 17:
-                case 19:
-                case 15:
-                case 87:
-                case 73:
-                case 92:
-                case 39:
-                case 61:
-                case 69:
-                    return true;
-                default:
-                    return isIdentifier();
-            }
-        }
-        function isStartOfExpression() {
-            if (isStartOfLeftHandSideExpression()) {
-                return true;
-            }
-            switch (token) {
-                case 35:
-                case 36:
-                case 50:
-                case 49:
-                case 78:
-                case 101:
-                case 103:
-                case 41:
-                case 42:
-                case 25:
-                case 119:
-                case 114:
-                    return true;
-                default:
-                    if (isBinaryOperator()) {
-                        return true;
-                    }
-                    return isIdentifier();
-            }
-        }
-        function isStartOfExpressionStatement() {
-            return token !== 15 &&
-                token !== 87 &&
-                token !== 73 &&
-                token !== 55 &&
-                isStartOfExpression();
-        }
-        function parseExpression() {
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(false);
-            }
-            var expr = parseAssignmentExpressionOrHigher();
-            var operatorToken;
-            while ((operatorToken = parseOptionalToken(24))) {
-                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
-            }
-            if (saveDecoratorContext) {
-                setDecoratorContext(true);
-            }
-            return expr;
-        }
-        function parseInitializer(inParameter) {
-            if (token !== 56) {
-                if (scanner.hasPrecedingLineBreak() || (inParameter && token === 15) || !isStartOfExpression()) {
-                    return undefined;
-                }
-            }
-            parseExpected(56);
-            return parseAssignmentExpressionOrHigher();
-        }
-        function parseAssignmentExpressionOrHigher() {
-            if (isYieldExpression()) {
-                return parseYieldExpression();
-            }
-            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
-            if (arrowExpression) {
-                return arrowExpression;
-            }
-            var expr = parseBinaryExpressionOrHigher(0);
-            if (expr.kind === 69 && token === 34) {
-                return parseSimpleArrowFunctionExpression(expr);
-            }
-            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
-                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
-            }
-            return parseConditionalExpressionRest(expr);
-        }
-        function isYieldExpression() {
-            if (token === 114) {
-                if (inYieldContext()) {
-                    return true;
-                }
-                return lookAhead(nextTokenIsIdentifierOrKeywordOrNumberOnSameLine);
-            }
-            return false;
-        }
-        function nextTokenIsIdentifierOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && isIdentifier();
-        }
-        function parseYieldExpression() {
-            var node = createNode(190);
-            nextToken();
-            if (!scanner.hasPrecedingLineBreak() &&
-                (token === 37 || isStartOfExpression())) {
-                node.asteriskToken = parseOptionalToken(37);
-                node.expression = parseAssignmentExpressionOrHigher();
-                return finishNode(node);
-            }
-            else {
-                return finishNode(node);
-            }
-        }
-        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
-            ts.Debug.assert(token === 34, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
-            var node;
-            if (asyncModifier) {
-                node = createNode(180, asyncModifier.pos);
-                setModifiers(node, asyncModifier);
-            }
-            else {
-                node = createNode(180, identifier.pos);
-            }
-            var parameter = createNode(142, identifier.pos);
-            parameter.name = identifier;
-            finishNode(parameter);
-            node.parameters = [parameter];
-            node.parameters.pos = parameter.pos;
-            node.parameters.end = parameter.end;
-            node.equalsGreaterThanToken = parseExpectedToken(34, false, ts.Diagnostics._0_expected, "=>");
-            node.body = parseArrowFunctionExpressionBody(!!asyncModifier);
-            return finishNode(node);
-        }
-        function tryParseParenthesizedArrowFunctionExpression() {
-            var triState = isParenthesizedArrowFunctionExpression();
-            if (triState === 0) {
-                return undefined;
-            }
-            var arrowFunction = triState === 1
-                ? parseParenthesizedArrowFunctionExpressionHead(true)
-                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
-            if (!arrowFunction) {
-                return undefined;
-            }
-            var isAsync = !!(arrowFunction.flags & 256);
-            var lastToken = token;
-            arrowFunction.equalsGreaterThanToken = parseExpectedToken(34, false, ts.Diagnostics._0_expected, "=>");
-            arrowFunction.body = (lastToken === 34 || lastToken === 15)
-                ? parseArrowFunctionExpressionBody(isAsync)
-                : parseIdentifier();
-            return finishNode(arrowFunction);
-        }
-        function isParenthesizedArrowFunctionExpression() {
-            if (token === 17 || token === 25 || token === 118) {
-                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
-            }
-            if (token === 34) {
-                return 1;
-            }
-            return 0;
-        }
-        function isParenthesizedArrowFunctionExpressionWorker() {
-            if (token === 118) {
-                nextToken();
-                if (scanner.hasPrecedingLineBreak()) {
-                    return 0;
-                }
-                if (token !== 17 && token !== 25) {
-                    return 0;
-                }
-            }
-            var first = token;
-            var second = nextToken();
-            if (first === 17) {
-                if (second === 18) {
-                    var third = nextToken();
-                    switch (third) {
-                        case 34:
-                        case 54:
-                        case 15:
-                            return 1;
-                        default:
-                            return 0;
-                    }
-                }
-                if (second === 19 || second === 15) {
-                    return 2;
-                }
-                if (second === 22) {
-                    return 1;
-                }
-                if (!isIdentifier()) {
-                    return 0;
-                }
-                if (nextToken() === 54) {
-                    return 1;
-                }
-                return 2;
-            }
-            else {
-                ts.Debug.assert(first === 25);
-                if (!isIdentifier()) {
-                    return 0;
-                }
-                if (sourceFile.languageVariant === 1) {
-                    var isArrowFunctionInJsx = lookAhead(function () {
-                        var third = nextToken();
-                        if (third === 83) {
-                            var fourth = nextToken();
-                            switch (fourth) {
-                                case 56:
-                                case 27:
-                                    return false;
-                                default:
-                                    return true;
-                            }
-                        }
-                        else if (third === 24) {
-                            return true;
-                        }
-                        return false;
-                    });
-                    if (isArrowFunctionInJsx) {
-                        return 1;
-                    }
-                    return 0;
-                }
-                return 2;
-            }
-        }
-        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
-            return parseParenthesizedArrowFunctionExpressionHead(false);
-        }
-        function tryParseAsyncSimpleArrowFunctionExpression() {
-            if (token === 118) {
-                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
-                if (isUnParenthesizedAsyncArrowFunction === 1) {
-                    var asyncModifier = parseModifiersForArrowFunction();
-                    var expr = parseBinaryExpressionOrHigher(0);
-                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
-                }
-            }
-            return undefined;
-        }
-        function isUnParenthesizedAsyncArrowFunctionWorker() {
-            if (token === 118) {
-                nextToken();
-                if (scanner.hasPrecedingLineBreak() || token === 34) {
-                    return 0;
-                }
-                var expr = parseBinaryExpressionOrHigher(0);
-                if (!scanner.hasPrecedingLineBreak() && expr.kind === 69 && token === 34) {
-                    return 1;
-                }
-            }
-            return 0;
-        }
-        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
-            var node = createNode(180);
-            setModifiers(node, parseModifiersForArrowFunction());
-            var isAsync = !!(node.flags & 256);
-            fillSignature(54, false, isAsync, !allowAmbiguity, node);
-            if (!node.parameters) {
-                return undefined;
-            }
-            if (!allowAmbiguity && token !== 34 && token !== 15) {
-                return undefined;
-            }
-            return node;
-        }
-        function parseArrowFunctionExpressionBody(isAsync) {
-            if (token === 15) {
-                return parseFunctionBlock(false, isAsync, false);
-            }
-            if (token !== 23 &&
-                token !== 87 &&
-                token !== 73 &&
-                isStartOfStatement() &&
-                !isStartOfExpressionStatement()) {
-                return parseFunctionBlock(false, isAsync, true);
-            }
-            return isAsync
-                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
-                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
-        }
-        function parseConditionalExpressionRest(leftOperand) {
-            var questionToken = parseOptionalToken(53);
-            if (!questionToken) {
-                return leftOperand;
-            }
-            var node = createNode(188, leftOperand.pos);
-            node.condition = leftOperand;
-            node.questionToken = questionToken;
-            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
-            node.colonToken = parseExpectedToken(54, false, ts.Diagnostics._0_expected, ts.tokenToString(54));
-            node.whenFalse = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
-        }
-        function parseBinaryExpressionOrHigher(precedence) {
-            var leftOperand = parseUnaryExpressionOrHigher();
-            return parseBinaryExpressionRest(precedence, leftOperand);
-        }
-        function isInOrOfKeyword(t) {
-            return t === 90 || t === 138;
-        }
-        function parseBinaryExpressionRest(precedence, leftOperand) {
-            while (true) {
-                reScanGreaterToken();
-                var newPrecedence = getBinaryOperatorPrecedence();
-                var consumeCurrentOperator = token === 38 ?
-                    newPrecedence >= precedence :
-                    newPrecedence > precedence;
-                if (!consumeCurrentOperator) {
-                    break;
-                }
-                if (token === 90 && inDisallowInContext()) {
-                    break;
-                }
-                if (token === 116) {
-                    if (scanner.hasPrecedingLineBreak()) {
-                        break;
-                    }
-                    else {
-                        nextToken();
-                        leftOperand = makeAsExpression(leftOperand, parseType());
-                    }
-                }
-                else {
-                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
-                }
-            }
-            return leftOperand;
-        }
-        function isBinaryOperator() {
-            if (inDisallowInContext() && token === 90) {
-                return false;
-            }
-            return getBinaryOperatorPrecedence() > 0;
-        }
-        function getBinaryOperatorPrecedence() {
-            switch (token) {
-                case 52:
-                    return 1;
-                case 51:
-                    return 2;
-                case 47:
-                    return 3;
-                case 48:
-                    return 4;
-                case 46:
-                    return 5;
-                case 30:
-                case 31:
-                case 32:
-                case 33:
-                    return 6;
-                case 25:
-                case 27:
-                case 28:
-                case 29:
-                case 91:
-                case 90:
-                case 116:
-                    return 7;
-                case 43:
-                case 44:
-                case 45:
-                    return 8;
-                case 35:
-                case 36:
-                    return 9;
-                case 37:
-                case 39:
-                case 40:
-                    return 10;
-                case 38:
-                    return 11;
-            }
-            return -1;
-        }
-        function makeBinaryExpression(left, operatorToken, right) {
-            var node = createNode(187, left.pos);
-            node.left = left;
-            node.operatorToken = operatorToken;
-            node.right = right;
-            return finishNode(node);
-        }
-        function makeAsExpression(left, right) {
-            var node = createNode(195, left.pos);
-            node.expression = left;
-            node.type = right;
-            return finishNode(node);
-        }
-        function parsePrefixUnaryExpression() {
-            var node = createNode(185);
-            node.operator = token;
-            nextToken();
-            node.operand = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseDeleteExpression() {
-            var node = createNode(181);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseTypeOfExpression() {
-            var node = createNode(182);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseVoidExpression() {
-            var node = createNode(183);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function isAwaitExpression() {
-            if (token === 119) {
-                if (inAwaitContext()) {
-                    return true;
-                }
-                return lookAhead(nextTokenIsIdentifierOnSameLine);
-            }
-            return false;
-        }
-        function parseAwaitExpression() {
-            var node = createNode(184);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseUnaryExpressionOrHigher() {
-            if (isAwaitExpression()) {
-                return parseAwaitExpression();
-            }
-            if (isIncrementExpression()) {
-                var incrementExpression = parseIncrementExpression();
-                return token === 38 ?
-                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), incrementExpression) :
-                    incrementExpression;
-            }
-            var unaryOperator = token;
-            var simpleUnaryExpression = parseSimpleUnaryExpression();
-            if (token === 38) {
-                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
-                if (simpleUnaryExpression.kind === 177) {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
-                }
-                else {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
-                }
-            }
-            return simpleUnaryExpression;
-        }
-        function parseSimpleUnaryExpression() {
-            switch (token) {
-                case 35:
-                case 36:
-                case 50:
-                case 49:
-                    return parsePrefixUnaryExpression();
-                case 78:
-                    return parseDeleteExpression();
-                case 101:
-                    return parseTypeOfExpression();
-                case 103:
-                    return parseVoidExpression();
-                case 25:
-                    return parseTypeAssertion();
-                default:
-                    return parseIncrementExpression();
-            }
-        }
-        function isIncrementExpression() {
-            switch (token) {
-                case 35:
-                case 36:
-                case 50:
-                case 49:
-                case 78:
-                case 101:
-                case 103:
-                    return false;
-                case 25:
-                    if (sourceFile.languageVariant !== 1) {
-                        return false;
-                    }
-                default:
-                    return true;
-            }
-        }
-        function parseIncrementExpression() {
-            if (token === 41 || token === 42) {
-                var node = createNode(185);
-                node.operator = token;
-                nextToken();
-                node.operand = parseLeftHandSideExpressionOrHigher();
-                return finishNode(node);
-            }
-            else if (sourceFile.languageVariant === 1 && token === 25 && lookAhead(nextTokenIsIdentifierOrKeyword)) {
-                return parseJsxElementOrSelfClosingElement(true);
-            }
-            var expression = parseLeftHandSideExpressionOrHigher();
-            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
-            if ((token === 41 || token === 42) && !scanner.hasPrecedingLineBreak()) {
-                var node = createNode(186, expression.pos);
-                node.operand = expression;
-                node.operator = token;
-                nextToken();
-                return finishNode(node);
-            }
-            return expression;
-        }
-        function parseLeftHandSideExpressionOrHigher() {
-            var expression = token === 95
-                ? parseSuperExpression()
-                : parseMemberExpressionOrHigher();
-            return parseCallExpressionRest(expression);
-        }
-        function parseMemberExpressionOrHigher() {
-            var expression = parsePrimaryExpression();
-            return parseMemberExpressionRest(expression);
-        }
-        function parseSuperExpression() {
-            var expression = parseTokenNode();
-            if (token === 17 || token === 21 || token === 19) {
-                return expression;
-            }
-            var node = createNode(172, expression.pos);
-            node.expression = expression;
-            node.dotToken = parseExpectedToken(21, false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
-            node.name = parseRightSideOfDot(true);
-            return finishNode(node);
-        }
-        function tagNamesAreEquivalent(lhs, rhs) {
-            if (lhs.kind !== rhs.kind) {
-                return false;
-            }
-            if (lhs.kind === 69) {
-                return lhs.text === rhs.text;
-            }
-            return lhs.right.text === rhs.right.text &&
-                tagNamesAreEquivalent(lhs.left, rhs.left);
-        }
-        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
-            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
-            var result;
-            if (opening.kind === 243) {
-                var node = createNode(241, opening.pos);
-                node.openingElement = opening;
-                node.children = parseJsxChildren(node.openingElement.tagName);
-                node.closingElement = parseJsxClosingElement(inExpressionContext);
-                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
-                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
-                }
-                result = finishNode(node);
-            }
-            else {
-                ts.Debug.assert(opening.kind === 242);
-                result = opening;
-            }
-            if (inExpressionContext && token === 25) {
-                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(true); });
-                if (invalidElement) {
-                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
-                    var badNode = createNode(187, result.pos);
-                    badNode.end = invalidElement.end;
-                    badNode.left = result;
-                    badNode.right = invalidElement;
-                    badNode.operatorToken = createMissingNode(24, false, undefined);
-                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
-                    return badNode;
-                }
-            }
-            return result;
-        }
-        function parseJsxText() {
-            var node = createNode(244, scanner.getStartPos());
-            token = scanner.scanJsxToken();
-            return finishNode(node);
-        }
-        function parseJsxChild() {
-            switch (token) {
-                case 244:
-                    return parseJsxText();
-                case 15:
-                    return parseJsxExpression(false);
-                case 25:
-                    return parseJsxElementOrSelfClosingElement(false);
-            }
-            ts.Debug.fail("Unknown JSX child kind " + token);
-        }
-        function parseJsxChildren(openingTagName) {
-            var result = [];
-            result.pos = scanner.getStartPos();
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << 14;
-            while (true) {
-                token = scanner.reScanJsxToken();
-                if (token === 26) {
-                    break;
-                }
-                else if (token === 1) {
-                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
-                    break;
-                }
-                result.push(parseJsxChild());
-            }
-            result.end = scanner.getTokenPos();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
-            var fullStart = scanner.getStartPos();
-            parseExpected(25);
-            var tagName = parseJsxElementName();
-            var attributes = parseList(13, parseJsxAttribute);
-            var node;
-            if (token === 27) {
-                node = createNode(243, fullStart);
-                scanJsxText();
-            }
-            else {
-                parseExpected(39);
-                if (inExpressionContext) {
-                    parseExpected(27);
-                }
-                else {
-                    parseExpected(27, undefined, false);
-                    scanJsxText();
-                }
-                node = createNode(242, fullStart);
-            }
-            node.tagName = tagName;
-            node.attributes = attributes;
-            return finishNode(node);
-        }
-        function parseJsxElementName() {
-            scanJsxIdentifier();
-            var elementName = parseIdentifierName();
-            while (parseOptional(21)) {
-                scanJsxIdentifier();
-                var node = createNode(139, elementName.pos);
-                node.left = elementName;
-                node.right = parseIdentifierName();
-                elementName = finishNode(node);
-            }
-            return elementName;
-        }
-        function parseJsxExpression(inExpressionContext) {
-            var node = createNode(248);
-            parseExpected(15);
-            if (token !== 16) {
-                node.expression = parseAssignmentExpressionOrHigher();
-            }
-            if (inExpressionContext) {
-                parseExpected(16);
-            }
-            else {
-                parseExpected(16, undefined, false);
-                scanJsxText();
-            }
-            return finishNode(node);
-        }
-        function parseJsxAttribute() {
-            if (token === 15) {
-                return parseJsxSpreadAttribute();
-            }
-            scanJsxIdentifier();
-            var node = createNode(246);
-            node.name = parseIdentifierName();
-            if (parseOptional(56)) {
-                switch (token) {
-                    case 9:
-                        node.initializer = parseLiteralNode();
-                        break;
-                    default:
-                        node.initializer = parseJsxExpression(true);
-                        break;
-                }
-            }
-            return finishNode(node);
-        }
-        function parseJsxSpreadAttribute() {
-            var node = createNode(247);
-            parseExpected(15);
-            parseExpected(22);
-            node.expression = parseExpression();
-            parseExpected(16);
-            return finishNode(node);
-        }
-        function parseJsxClosingElement(inExpressionContext) {
-            var node = createNode(245);
-            parseExpected(26);
-            node.tagName = parseJsxElementName();
-            if (inExpressionContext) {
-                parseExpected(27);
-            }
-            else {
-                parseExpected(27, undefined, false);
-                scanJsxText();
-            }
-            return finishNode(node);
-        }
-        function parseTypeAssertion() {
-            var node = createNode(177);
-            parseExpected(25);
-            node.type = parseType();
-            parseExpected(27);
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseMemberExpressionRest(expression) {
-            while (true) {
-                var dotToken = parseOptionalToken(21);
-                if (dotToken) {
-                    var propertyAccess = createNode(172, expression.pos);
-                    propertyAccess.expression = expression;
-                    propertyAccess.dotToken = dotToken;
-                    propertyAccess.name = parseRightSideOfDot(true);
-                    expression = finishNode(propertyAccess);
-                    continue;
-                }
-                if (token === 49 && !scanner.hasPrecedingLineBreak()) {
-                    nextToken();
-                    var nonNullExpression = createNode(196, expression.pos);
-                    nonNullExpression.expression = expression;
-                    expression = finishNode(nonNullExpression);
-                    continue;
-                }
-                if (!inDecoratorContext() && parseOptional(19)) {
-                    var indexedAccess = createNode(173, expression.pos);
-                    indexedAccess.expression = expression;
-                    if (token !== 20) {
-                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
-                        if (indexedAccess.argumentExpression.kind === 9 || indexedAccess.argumentExpression.kind === 8) {
-                            var literal = indexedAccess.argumentExpression;
-                            literal.text = internIdentifier(literal.text);
-                        }
-                    }
-                    parseExpected(20);
-                    expression = finishNode(indexedAccess);
-                    continue;
-                }
-                if (token === 11 || token === 12) {
-                    var tagExpression = createNode(176, expression.pos);
-                    tagExpression.tag = expression;
-                    tagExpression.template = token === 11
-                        ? parseLiteralNode()
-                        : parseTemplateExpression();
-                    expression = finishNode(tagExpression);
-                    continue;
-                }
-                return expression;
-            }
-        }
-        function parseCallExpressionRest(expression) {
-            while (true) {
-                expression = parseMemberExpressionRest(expression);
-                if (token === 25) {
-                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
-                    if (!typeArguments) {
-                        return expression;
-                    }
-                    var callExpr = createNode(174, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.typeArguments = typeArguments;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
-                }
-                else if (token === 17) {
-                    var callExpr = createNode(174, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
-                }
-                return expression;
-            }
-        }
-        function parseArgumentList() {
-            parseExpected(17);
-            var result = parseDelimitedList(11, parseArgumentExpression);
-            parseExpected(18);
-            return result;
-        }
-        function parseTypeArgumentsInExpression() {
-            if (!parseOptional(25)) {
-                return undefined;
-            }
-            var typeArguments = parseDelimitedList(18, parseType);
-            if (!parseExpected(27)) {
-                return undefined;
-            }
-            return typeArguments && canFollowTypeArgumentsInExpression()
-                ? typeArguments
-                : undefined;
-        }
-        function canFollowTypeArgumentsInExpression() {
-            switch (token) {
-                case 17:
-                case 21:
-                case 18:
-                case 20:
-                case 54:
-                case 23:
-                case 53:
-                case 30:
-                case 32:
-                case 31:
-                case 33:
-                case 51:
-                case 52:
-                case 48:
-                case 46:
-                case 47:
-                case 16:
-                case 1:
-                    return true;
-                case 24:
-                case 15:
-                default:
-                    return false;
-            }
-        }
-        function parsePrimaryExpression() {
-            switch (token) {
-                case 8:
-                case 9:
-                case 11:
-                    return parseLiteralNode();
-                case 97:
-                case 95:
-                case 93:
-                case 99:
-                case 84:
-                    return parseTokenNode();
-                case 17:
-                    return parseParenthesizedExpression();
-                case 19:
-                    return parseArrayLiteralExpression();
-                case 15:
-                    return parseObjectLiteralExpression();
-                case 118:
-                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
-                        break;
-                    }
-                    return parseFunctionExpression();
-                case 73:
-                    return parseClassExpression();
-                case 87:
-                    return parseFunctionExpression();
-                case 92:
-                    return parseNewExpression();
-                case 39:
-                case 61:
-                    if (reScanSlashToken() === 10) {
-                        return parseLiteralNode();
-                    }
-                    break;
-                case 12:
-                    return parseTemplateExpression();
-            }
-            return parseIdentifier(ts.Diagnostics.Expression_expected);
-        }
-        function parseParenthesizedExpression() {
-            var node = createNode(178);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            return finishNode(node);
-        }
-        function parseSpreadElement() {
-            var node = createNode(191);
-            parseExpected(22);
-            node.expression = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
-        }
-        function parseArgumentOrArrayLiteralElement() {
-            return token === 22 ? parseSpreadElement() :
-                token === 24 ? createNode(193) :
-                    parseAssignmentExpressionOrHigher();
-        }
-        function parseArgumentExpression() {
-            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
-        }
-        function parseArrayLiteralExpression() {
-            var node = createNode(170);
-            parseExpected(19);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.elements = parseDelimitedList(15, parseArgumentOrArrayLiteralElement);
-            parseExpected(20);
-            return finishNode(node);
-        }
-        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
-            if (parseContextualModifier(123)) {
-                return addJSDocComment(parseAccessorDeclaration(149, fullStart, decorators, modifiers));
-            }
-            else if (parseContextualModifier(131)) {
-                return parseAccessorDeclaration(150, fullStart, decorators, modifiers);
-            }
-            return undefined;
-        }
-        function parseObjectLiteralElement() {
-            var fullStart = scanner.getStartPos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
-            }
-            var asteriskToken = parseOptionalToken(37);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            var questionToken = parseOptionalToken(53);
-            if (asteriskToken || token === 17 || token === 25) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
-            }
-            var isShorthandPropertyAssignment = tokenIsIdentifier && (token === 24 || token === 16 || token === 56);
-            if (isShorthandPropertyAssignment) {
-                var shorthandDeclaration = createNode(254, fullStart);
-                shorthandDeclaration.name = propertyName;
-                shorthandDeclaration.questionToken = questionToken;
-                var equalsToken = parseOptionalToken(56);
-                if (equalsToken) {
-                    shorthandDeclaration.equalsToken = equalsToken;
-                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                }
-                return addJSDocComment(finishNode(shorthandDeclaration));
-            }
-            else {
-                var propertyAssignment = createNode(253, fullStart);
-                propertyAssignment.modifiers = modifiers;
-                propertyAssignment.name = propertyName;
-                propertyAssignment.questionToken = questionToken;
-                parseExpected(54);
-                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                return addJSDocComment(finishNode(propertyAssignment));
-            }
-        }
-        function parseObjectLiteralExpression() {
-            var node = createNode(171);
-            parseExpected(15);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.properties = parseDelimitedList(12, parseObjectLiteralElement, true);
-            parseExpected(16);
-            return finishNode(node);
-        }
-        function parseFunctionExpression() {
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(false);
-            }
-            var node = createNode(179);
-            setModifiers(node, parseModifiers());
-            parseExpected(87);
-            node.asteriskToken = parseOptionalToken(37);
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = !!(node.flags & 256);
-            node.name =
-                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
-                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
-                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
-                            parseOptionalIdentifier();
-            fillSignature(54, isGenerator, isAsync, false, node);
-            node.body = parseFunctionBlock(isGenerator, isAsync, false);
-            if (saveDecoratorContext) {
-                setDecoratorContext(true);
-            }
-            return addJSDocComment(finishNode(node));
-        }
-        function parseOptionalIdentifier() {
-            return isIdentifier() ? parseIdentifier() : undefined;
-        }
-        function parseNewExpression() {
-            var node = createNode(175);
-            parseExpected(92);
-            node.expression = parseMemberExpressionOrHigher();
-            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
-            if (node.typeArguments || token === 17) {
-                node.arguments = parseArgumentList();
-            }
-            return finishNode(node);
-        }
-        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
-            var node = createNode(199);
-            if (parseExpected(15, diagnosticMessage) || ignoreMissingOpenBrace) {
-                node.statements = parseList(1, parseStatement);
-                parseExpected(16);
-            }
-            else {
-                node.statements = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
-            var savedYieldContext = inYieldContext();
-            setYieldContext(allowYield);
-            var savedAwaitContext = inAwaitContext();
-            setAwaitContext(allowAwait);
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(false);
-            }
-            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
-            if (saveDecoratorContext) {
-                setDecoratorContext(true);
-            }
-            setYieldContext(savedYieldContext);
-            setAwaitContext(savedAwaitContext);
-            return block;
-        }
-        function parseEmptyStatement() {
-            var node = createNode(201);
-            parseExpected(23);
-            return finishNode(node);
-        }
-        function parseIfStatement() {
-            var node = createNode(203);
-            parseExpected(88);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            node.thenStatement = parseStatement();
-            node.elseStatement = parseOptional(80) ? parseStatement() : undefined;
-            return finishNode(node);
-        }
-        function parseDoStatement() {
-            var node = createNode(204);
-            parseExpected(79);
-            node.statement = parseStatement();
-            parseExpected(104);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            parseOptional(23);
-            return finishNode(node);
-        }
-        function parseWhileStatement() {
-            var node = createNode(205);
-            parseExpected(104);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            node.statement = parseStatement();
-            return finishNode(node);
-        }
-        function parseForOrForInOrForOfStatement() {
-            var pos = getNodePos();
-            parseExpected(86);
-            parseExpected(17);
-            var initializer = undefined;
-            if (token !== 23) {
-                if (token === 102 || token === 108 || token === 74) {
-                    initializer = parseVariableDeclarationList(true);
-                }
-                else {
-                    initializer = disallowInAnd(parseExpression);
-                }
-            }
-            var forOrForInOrForOfStatement;
-            if (parseOptional(90)) {
-                var forInStatement = createNode(207, pos);
-                forInStatement.initializer = initializer;
-                forInStatement.expression = allowInAnd(parseExpression);
-                parseExpected(18);
-                forOrForInOrForOfStatement = forInStatement;
-            }
-            else if (parseOptional(138)) {
-                var forOfStatement = createNode(208, pos);
-                forOfStatement.initializer = initializer;
-                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
-                parseExpected(18);
-                forOrForInOrForOfStatement = forOfStatement;
-            }
-            else {
-                var forStatement = createNode(206, pos);
-                forStatement.initializer = initializer;
-                parseExpected(23);
-                if (token !== 23 && token !== 18) {
-                    forStatement.condition = allowInAnd(parseExpression);
-                }
-                parseExpected(23);
-                if (token !== 18) {
-                    forStatement.incrementor = allowInAnd(parseExpression);
-                }
-                parseExpected(18);
-                forOrForInOrForOfStatement = forStatement;
-            }
-            forOrForInOrForOfStatement.statement = parseStatement();
-            return finishNode(forOrForInOrForOfStatement);
-        }
-        function parseBreakOrContinueStatement(kind) {
-            var node = createNode(kind);
-            parseExpected(kind === 210 ? 70 : 75);
-            if (!canParseSemicolon()) {
-                node.label = parseIdentifier();
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseReturnStatement() {
-            var node = createNode(211);
-            parseExpected(94);
-            if (!canParseSemicolon()) {
-                node.expression = allowInAnd(parseExpression);
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseWithStatement() {
-            var node = createNode(212);
-            parseExpected(105);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            node.statement = parseStatement();
-            return finishNode(node);
-        }
-        function parseCaseClause() {
-            var node = createNode(249);
-            parseExpected(71);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(54);
-            node.statements = parseList(3, parseStatement);
-            return finishNode(node);
-        }
-        function parseDefaultClause() {
-            var node = createNode(250);
-            parseExpected(77);
-            parseExpected(54);
-            node.statements = parseList(3, parseStatement);
-            return finishNode(node);
-        }
-        function parseCaseOrDefaultClause() {
-            return token === 71 ? parseCaseClause() : parseDefaultClause();
-        }
-        function parseSwitchStatement() {
-            var node = createNode(213);
-            parseExpected(96);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            var caseBlock = createNode(227, scanner.getStartPos());
-            parseExpected(15);
-            caseBlock.clauses = parseList(2, parseCaseOrDefaultClause);
-            parseExpected(16);
-            node.caseBlock = finishNode(caseBlock);
-            return finishNode(node);
-        }
-        function parseThrowStatement() {
-            var node = createNode(215);
-            parseExpected(98);
-            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseTryStatement() {
-            var node = createNode(216);
-            parseExpected(100);
-            node.tryBlock = parseBlock(false);
-            node.catchClause = token === 72 ? parseCatchClause() : undefined;
-            if (!node.catchClause || token === 85) {
-                parseExpected(85);
-                node.finallyBlock = parseBlock(false);
-            }
-            return finishNode(node);
-        }
-        function parseCatchClause() {
-            var result = createNode(252);
-            parseExpected(72);
-            if (parseExpected(17)) {
-                result.variableDeclaration = parseVariableDeclaration();
-            }
-            parseExpected(18);
-            result.block = parseBlock(false);
-            return finishNode(result);
-        }
-        function parseDebuggerStatement() {
-            var node = createNode(217);
-            parseExpected(76);
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseExpressionOrLabeledStatement() {
-            var fullStart = scanner.getStartPos();
-            var expression = allowInAnd(parseExpression);
-            if (expression.kind === 69 && parseOptional(54)) {
-                var labeledStatement = createNode(214, fullStart);
-                labeledStatement.label = expression;
-                labeledStatement.statement = parseStatement();
-                return addJSDocComment(finishNode(labeledStatement));
-            }
-            else {
-                var expressionStatement = createNode(202, fullStart);
-                expressionStatement.expression = expression;
-                parseSemicolon();
-                return addJSDocComment(finishNode(expressionStatement));
-            }
-        }
-        function nextTokenIsIdentifierOrKeywordOnSameLine() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token) && !scanner.hasPrecedingLineBreak();
-        }
-        function nextTokenIsFunctionKeywordOnSameLine() {
-            nextToken();
-            return token === 87 && !scanner.hasPrecedingLineBreak();
-        }
-        function nextTokenIsIdentifierOrKeywordOrNumberOnSameLine() {
-            nextToken();
-            return (ts.tokenIsIdentifierOrKeyword(token) || token === 8) && !scanner.hasPrecedingLineBreak();
-        }
-        function isDeclaration() {
-            while (true) {
-                switch (token) {
-                    case 102:
-                    case 108:
-                    case 74:
-                    case 87:
-                    case 73:
-                    case 81:
-                        return true;
-                    case 107:
-                    case 134:
-                        return nextTokenIsIdentifierOnSameLine();
-                    case 125:
-                    case 126:
-                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
-                    case 115:
-                    case 118:
-                    case 122:
-                    case 110:
-                    case 111:
-                    case 112:
-                    case 128:
-                        nextToken();
-                        if (scanner.hasPrecedingLineBreak()) {
-                            return false;
-                        }
-                        continue;
-                    case 137:
-                        nextToken();
-                        return token === 15 || token === 69 || token === 82;
-                    case 89:
-                        nextToken();
-                        return token === 9 || token === 37 ||
-                            token === 15 || ts.tokenIsIdentifierOrKeyword(token);
-                    case 82:
-                        nextToken();
-                        if (token === 56 || token === 37 ||
-                            token === 15 || token === 77 ||
-                            token === 116) {
-                            return true;
-                        }
-                        continue;
-                    case 113:
-                        nextToken();
-                        continue;
-                    default:
-                        return false;
-                }
-            }
-        }
-        function isStartOfDeclaration() {
-            return lookAhead(isDeclaration);
-        }
-        function isStartOfStatement() {
-            switch (token) {
-                case 55:
-                case 23:
-                case 15:
-                case 102:
-                case 108:
-                case 87:
-                case 73:
-                case 81:
-                case 88:
-                case 79:
-                case 104:
-                case 86:
-                case 75:
-                case 70:
-                case 94:
-                case 105:
-                case 96:
-                case 98:
-                case 100:
-                case 76:
-                case 72:
-                case 85:
-                    return true;
-                case 74:
-                case 82:
-                case 89:
-                    return isStartOfDeclaration();
-                case 118:
-                case 122:
-                case 107:
-                case 125:
-                case 126:
-                case 134:
-                case 137:
-                    return true;
-                case 112:
-                case 110:
-                case 111:
-                case 113:
-                case 128:
-                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                default:
-                    return isStartOfExpression();
-            }
-        }
-        function nextTokenIsIdentifierOrStartOfDestructuring() {
-            nextToken();
-            return isIdentifier() || token === 15 || token === 19;
-        }
-        function isLetDeclaration() {
-            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
-        }
-        function parseStatement() {
-            switch (token) {
-                case 23:
-                    return parseEmptyStatement();
-                case 15:
-                    return parseBlock(false);
-                case 102:
-                    return parseVariableStatement(scanner.getStartPos(), undefined, undefined);
-                case 108:
-                    if (isLetDeclaration()) {
-                        return parseVariableStatement(scanner.getStartPos(), undefined, undefined);
-                    }
-                    break;
-                case 87:
-                    return parseFunctionDeclaration(scanner.getStartPos(), undefined, undefined);
-                case 73:
-                    return parseClassDeclaration(scanner.getStartPos(), undefined, undefined);
-                case 88:
-                    return parseIfStatement();
-                case 79:
-                    return parseDoStatement();
-                case 104:
-                    return parseWhileStatement();
-                case 86:
-                    return parseForOrForInOrForOfStatement();
-                case 75:
-                    return parseBreakOrContinueStatement(209);
-                case 70:
-                    return parseBreakOrContinueStatement(210);
-                case 94:
-                    return parseReturnStatement();
-                case 105:
-                    return parseWithStatement();
-                case 96:
-                    return parseSwitchStatement();
-                case 98:
-                    return parseThrowStatement();
-                case 100:
-                case 72:
-                case 85:
-                    return parseTryStatement();
-                case 76:
-                    return parseDebuggerStatement();
-                case 55:
-                    return parseDeclaration();
-                case 118:
-                case 107:
-                case 134:
-                case 125:
-                case 126:
-                case 122:
-                case 74:
-                case 81:
-                case 82:
-                case 89:
-                case 110:
-                case 111:
-                case 112:
-                case 115:
-                case 113:
-                case 128:
-                case 137:
-                    if (isStartOfDeclaration()) {
-                        return parseDeclaration();
-                    }
-                    break;
-            }
-            return parseExpressionOrLabeledStatement();
-        }
-        function parseDeclaration() {
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            switch (token) {
-                case 102:
-                case 108:
-                case 74:
-                    return parseVariableStatement(fullStart, decorators, modifiers);
-                case 87:
-                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
-                case 73:
-                    return parseClassDeclaration(fullStart, decorators, modifiers);
-                case 107:
-                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
-                case 134:
-                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
-                case 81:
-                    return parseEnumDeclaration(fullStart, decorators, modifiers);
-                case 137:
-                case 125:
-                case 126:
-                    return parseModuleDeclaration(fullStart, decorators, modifiers);
-                case 89:
-                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
-                case 82:
-                    nextToken();
-                    switch (token) {
-                        case 77:
-                        case 56:
-                            return parseExportAssignment(fullStart, decorators, modifiers);
-                        case 116:
-                            return parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers);
-                        default:
-                            return parseExportDeclaration(fullStart, decorators, modifiers);
-                    }
-                default:
-                    if (decorators || modifiers) {
-                        var node = createMissingNode(239, true, ts.Diagnostics.Declaration_expected);
-                        node.pos = fullStart;
-                        node.decorators = decorators;
-                        setModifiers(node, modifiers);
-                        return finishNode(node);
-                    }
-            }
-        }
-        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token === 9);
-        }
-        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
-            if (token !== 15 && canParseSemicolon()) {
-                parseSemicolon();
-                return;
-            }
-            return parseFunctionBlock(isGenerator, isAsync, false, diagnosticMessage);
-        }
-        function parseArrayBindingElement() {
-            if (token === 24) {
-                return createNode(193);
-            }
-            var node = createNode(169);
-            node.dotDotDotToken = parseOptionalToken(22);
-            node.name = parseIdentifierOrPattern();
-            node.initializer = parseBindingElementInitializer(false);
-            return finishNode(node);
-        }
-        function parseObjectBindingElement() {
-            var node = createNode(169);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            if (tokenIsIdentifier && token !== 54) {
-                node.name = propertyName;
-            }
-            else {
-                parseExpected(54);
-                node.propertyName = propertyName;
-                node.name = parseIdentifierOrPattern();
-            }
-            node.initializer = parseBindingElementInitializer(false);
-            return finishNode(node);
-        }
-        function parseObjectBindingPattern() {
-            var node = createNode(167);
-            parseExpected(15);
-            node.elements = parseDelimitedList(9, parseObjectBindingElement);
-            parseExpected(16);
-            return finishNode(node);
-        }
-        function parseArrayBindingPattern() {
-            var node = createNode(168);
-            parseExpected(19);
-            node.elements = parseDelimitedList(10, parseArrayBindingElement);
-            parseExpected(20);
-            return finishNode(node);
-        }
-        function isIdentifierOrPattern() {
-            return token === 15 || token === 19 || isIdentifier();
-        }
-        function parseIdentifierOrPattern() {
-            if (token === 19) {
-                return parseArrayBindingPattern();
-            }
-            if (token === 15) {
-                return parseObjectBindingPattern();
-            }
-            return parseIdentifier();
-        }
-        function parseVariableDeclaration() {
-            var node = createNode(218);
-            node.name = parseIdentifierOrPattern();
-            node.type = parseTypeAnnotation();
-            if (!isInOrOfKeyword(token)) {
-                node.initializer = parseInitializer(false);
-            }
-            return finishNode(node);
-        }
-        function parseVariableDeclarationList(inForStatementInitializer) {
-            var node = createNode(219);
-            switch (token) {
-                case 102:
-                    break;
-                case 108:
-                    node.flags |= 1024;
-                    break;
-                case 74:
-                    node.flags |= 2048;
-                    break;
-                default:
-                    ts.Debug.fail();
-            }
-            nextToken();
-            if (token === 138 && lookAhead(canFollowContextualOfKeyword)) {
-                node.declarations = createMissingList();
-            }
-            else {
-                var savedDisallowIn = inDisallowInContext();
-                setDisallowInContext(inForStatementInitializer);
-                node.declarations = parseDelimitedList(8, parseVariableDeclaration);
-                setDisallowInContext(savedDisallowIn);
-            }
-            return finishNode(node);
-        }
-        function canFollowContextualOfKeyword() {
-            return nextTokenIsIdentifier() && nextToken() === 18;
-        }
-        function parseVariableStatement(fullStart, decorators, modifiers) {
-            var node = createNode(200, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.declarationList = parseVariableDeclarationList(false);
-            parseSemicolon();
-            return addJSDocComment(finishNode(node));
-        }
-        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(220, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(87);
-            node.asteriskToken = parseOptionalToken(37);
-            node.name = node.flags & 512 ? parseOptionalIdentifier() : parseIdentifier();
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = !!(node.flags & 256);
-            fillSignature(54, isGenerator, isAsync, false, node);
-            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
-        }
-        function parseConstructorDeclaration(pos, decorators, modifiers) {
-            var node = createNode(148, pos);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(121);
-            fillSignature(54, false, false, false, node);
-            node.body = parseFunctionBlockOrSemicolon(false, false, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
-        }
-        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
-            var method = createNode(147, fullStart);
-            method.decorators = decorators;
-            setModifiers(method, modifiers);
-            method.asteriskToken = asteriskToken;
-            method.name = name;
-            method.questionToken = questionToken;
-            var isGenerator = !!asteriskToken;
-            var isAsync = !!(method.flags & 256);
-            fillSignature(54, isGenerator, isAsync, false, method);
-            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
-            return addJSDocComment(finishNode(method));
-        }
-        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
-            var property = createNode(145, fullStart);
-            property.decorators = decorators;
-            setModifiers(property, modifiers);
-            property.name = name;
-            property.questionToken = questionToken;
-            property.type = parseTypeAnnotation();
-            property.initializer = modifiers && modifiers.flags & 32
-                ? allowInAnd(parseNonParameterInitializer)
-                : doOutsideOfContext(8388608 | 4194304, parseNonParameterInitializer);
-            parseSemicolon();
-            return finishNode(property);
-        }
-        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
-            var asteriskToken = parseOptionalToken(37);
-            var name = parsePropertyName();
-            var questionToken = parseOptionalToken(53);
-            if (asteriskToken || token === 17 || token === 25) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
-            }
-            else {
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
-            }
-        }
-        function parseNonParameterInitializer() {
-            return parseInitializer(false);
-        }
-        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.name = parsePropertyName();
-            fillSignature(54, false, false, false, node);
-            node.body = parseFunctionBlockOrSemicolon(false, false);
-            return finishNode(node);
-        }
-        function isClassMemberModifier(idToken) {
-            switch (idToken) {
-                case 112:
-                case 110:
-                case 111:
-                case 113:
-                case 128:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-        function isClassMemberStart() {
-            var idToken;
-            if (token === 55) {
-                return true;
-            }
-            while (ts.isModifierKind(token)) {
-                idToken = token;
-                if (isClassMemberModifier(idToken)) {
-                    return true;
-                }
-                nextToken();
-            }
-            if (token === 37) {
-                return true;
-            }
-            if (isLiteralPropertyName()) {
-                idToken = token;
-                nextToken();
-            }
-            if (token === 19) {
-                return true;
-            }
-            if (idToken !== undefined) {
-                if (!ts.isKeyword(idToken) || idToken === 131 || idToken === 123) {
-                    return true;
-                }
-                switch (token) {
-                    case 17:
-                    case 25:
-                    case 54:
-                    case 56:
-                    case 53:
-                        return true;
-                    default:
-                        return canParseSemicolon();
-                }
-            }
-            return false;
-        }
-        function parseDecorators() {
-            var decorators;
-            while (true) {
-                var decoratorStart = getNodePos();
-                if (!parseOptional(55)) {
-                    break;
-                }
-                if (!decorators) {
-                    decorators = [];
-                    decorators.pos = decoratorStart;
-                }
-                var decorator = createNode(143, decoratorStart);
-                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
-                decorators.push(finishNode(decorator));
-            }
-            if (decorators) {
-                decorators.end = getNodeEnd();
-            }
-            return decorators;
-        }
-        function parseModifiers(permitInvalidConstAsModifier) {
-            var flags = 0;
-            var modifiers;
-            while (true) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token;
-                if (token === 74 && permitInvalidConstAsModifier) {
-                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
-                        break;
-                    }
-                }
-                else {
-                    if (!parseAnyContextualModifier()) {
-                        break;
-                    }
-                }
-                if (!modifiers) {
-                    modifiers = [];
-                    modifiers.pos = modifierStart;
-                }
-                flags |= ts.modifierToFlag(modifierKind);
-                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
-            }
-            if (modifiers) {
-                modifiers.flags = flags;
-                modifiers.end = scanner.getStartPos();
-            }
-            return modifiers;
-        }
-        function parseModifiersForArrowFunction() {
-            var flags = 0;
-            var modifiers;
-            if (token === 118) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token;
-                nextToken();
-                modifiers = [];
-                modifiers.pos = modifierStart;
-                flags |= ts.modifierToFlag(modifierKind);
-                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
-                modifiers.flags = flags;
-                modifiers.end = scanner.getStartPos();
-            }
-            return modifiers;
-        }
-        function parseClassElement() {
-            if (token === 23) {
-                var result = createNode(198);
-                nextToken();
-                return finishNode(result);
-            }
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers(true);
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
-            }
-            if (token === 121) {
-                return parseConstructorDeclaration(fullStart, decorators, modifiers);
-            }
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
-            }
-            if (ts.tokenIsIdentifierOrKeyword(token) ||
-                token === 9 ||
-                token === 8 ||
-                token === 37 ||
-                token === 19) {
-                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
-            }
-            if (decorators || modifiers) {
-                var name_7 = createMissingNode(69, true, ts.Diagnostics.Declaration_expected);
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_7, undefined);
-            }
-            ts.Debug.fail("Should not have attempted to parse class member declaration.");
-        }
-        function parseClassExpression() {
-            return parseClassDeclarationOrExpression(scanner.getStartPos(), undefined, undefined, 192);
-        }
-        function parseClassDeclaration(fullStart, decorators, modifiers) {
-            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 221);
-        }
-        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(73);
-            node.name = parseNameOfClassDeclarationOrExpression();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(true);
-            if (parseExpected(15)) {
-                node.members = parseClassMembers();
-                parseExpected(16);
-            }
-            else {
-                node.members = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseNameOfClassDeclarationOrExpression() {
-            return isIdentifier() && !isImplementsClause()
-                ? parseIdentifier()
-                : undefined;
-        }
-        function isImplementsClause() {
-            return token === 106 && lookAhead(nextTokenIsIdentifierOrKeyword);
-        }
-        function parseHeritageClauses(isClassHeritageClause) {
-            if (isHeritageClause()) {
-                return parseList(20, parseHeritageClause);
-            }
-            return undefined;
-        }
-        function parseHeritageClause() {
-            if (token === 83 || token === 106) {
-                var node = createNode(251);
-                node.token = token;
-                nextToken();
-                node.types = parseDelimitedList(7, parseExpressionWithTypeArguments);
-                return finishNode(node);
-            }
-            return undefined;
-        }
-        function parseExpressionWithTypeArguments() {
-            var node = createNode(194);
-            node.expression = parseLeftHandSideExpressionOrHigher();
-            if (token === 25) {
-                node.typeArguments = parseBracketedList(18, parseType, 25, 27);
-            }
-            return finishNode(node);
-        }
-        function isHeritageClause() {
-            return token === 83 || token === 106;
-        }
-        function parseClassMembers() {
-            return parseList(5, parseClassElement);
-        }
-        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(222, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(107);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(false);
-            node.members = parseObjectTypeMembers();
-            return finishNode(node);
-        }
-        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(223, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(134);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            parseExpected(56);
-            node.type = parseType();
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseEnumMember() {
-            var node = createNode(255, scanner.getStartPos());
-            node.name = parsePropertyName();
-            node.initializer = allowInAnd(parseNonParameterInitializer);
-            return finishNode(node);
-        }
-        function parseEnumDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(224, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(81);
-            node.name = parseIdentifier();
-            if (parseExpected(15)) {
-                node.members = parseDelimitedList(6, parseEnumMember);
-                parseExpected(16);
-            }
-            else {
-                node.members = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseModuleBlock() {
-            var node = createNode(226, scanner.getStartPos());
-            if (parseExpected(15)) {
-                node.statements = parseList(1, parseStatement);
-                parseExpected(16);
-            }
-            else {
-                node.statements = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
-            var node = createNode(225, fullStart);
-            var namespaceFlag = flags & 4096;
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.flags |= flags;
-            node.name = parseIdentifier();
-            node.body = parseOptional(21)
-                ? parseModuleOrNamespaceDeclaration(getNodePos(), undefined, undefined, 1 | namespaceFlag)
-                : parseModuleBlock();
-            return finishNode(node);
-        }
-        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(225, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (token === 137) {
-                node.name = parseIdentifier();
-                node.flags |= 131072;
-            }
-            else {
-                node.name = parseLiteralNode(true);
-            }
-            node.body = parseModuleBlock();
-            return finishNode(node);
-        }
-        function parseModuleDeclaration(fullStart, decorators, modifiers) {
-            var flags = modifiers ? modifiers.flags : 0;
-            if (token === 137) {
-                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
-            }
-            else if (parseOptional(126)) {
-                flags |= 4096;
-            }
-            else {
-                parseExpected(125);
-                if (token === 9) {
-                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
-                }
-            }
-            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
-        }
-        function isExternalModuleReference() {
-            return token === 129 &&
-                lookAhead(nextTokenIsOpenParen);
-        }
-        function nextTokenIsOpenParen() {
-            return nextToken() === 17;
-        }
-        function nextTokenIsSlash() {
-            return nextToken() === 39;
-        }
-        function parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers) {
-            var exportDeclaration = createNode(228, fullStart);
-            exportDeclaration.decorators = decorators;
-            exportDeclaration.modifiers = modifiers;
-            parseExpected(116);
-            parseExpected(126);
-            exportDeclaration.name = parseIdentifier();
-            parseExpected(23);
-            return finishNode(exportDeclaration);
-        }
-        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
-            parseExpected(89);
-            var afterImportPos = scanner.getStartPos();
-            var identifier;
-            if (isIdentifier()) {
-                identifier = parseIdentifier();
-                if (token !== 24 && token !== 136) {
-                    var importEqualsDeclaration = createNode(229, fullStart);
-                    importEqualsDeclaration.decorators = decorators;
-                    setModifiers(importEqualsDeclaration, modifiers);
-                    importEqualsDeclaration.name = identifier;
-                    parseExpected(56);
-                    importEqualsDeclaration.moduleReference = parseModuleReference();
-                    parseSemicolon();
-                    return finishNode(importEqualsDeclaration);
-                }
-            }
-            var importDeclaration = createNode(230, fullStart);
-            importDeclaration.decorators = decorators;
-            setModifiers(importDeclaration, modifiers);
-            if (identifier ||
-                token === 37 ||
-                token === 15) {
-                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
-                parseExpected(136);
-            }
-            importDeclaration.moduleSpecifier = parseModuleSpecifier();
-            parseSemicolon();
-            return finishNode(importDeclaration);
-        }
-        function parseImportClause(identifier, fullStart) {
-            var importClause = createNode(231, fullStart);
-            if (identifier) {
-                importClause.name = identifier;
-            }
-            if (!importClause.name ||
-                parseOptional(24)) {
-                importClause.namedBindings = token === 37 ? parseNamespaceImport() : parseNamedImportsOrExports(233);
-            }
-            return finishNode(importClause);
-        }
-        function parseModuleReference() {
-            return isExternalModuleReference()
-                ? parseExternalModuleReference()
-                : parseEntityName(false);
-        }
-        function parseExternalModuleReference() {
-            var node = createNode(240);
-            parseExpected(129);
-            parseExpected(17);
-            node.expression = parseModuleSpecifier();
-            parseExpected(18);
-            return finishNode(node);
-        }
-        function parseModuleSpecifier() {
-            if (token === 9) {
-                var result = parseLiteralNode();
-                internIdentifier(result.text);
-                return result;
-            }
-            else {
-                return parseExpression();
-            }
-        }
-        function parseNamespaceImport() {
-            var namespaceImport = createNode(232);
-            parseExpected(37);
-            parseExpected(116);
-            namespaceImport.name = parseIdentifier();
-            return finishNode(namespaceImport);
-        }
-        function parseNamedImportsOrExports(kind) {
-            var node = createNode(kind);
-            node.elements = parseBracketedList(21, kind === 233 ? parseImportSpecifier : parseExportSpecifier, 15, 16);
-            return finishNode(node);
-        }
-        function parseExportSpecifier() {
-            return parseImportOrExportSpecifier(238);
-        }
-        function parseImportSpecifier() {
-            return parseImportOrExportSpecifier(234);
-        }
-        function parseImportOrExportSpecifier(kind) {
-            var node = createNode(kind);
-            var checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
-            var checkIdentifierStart = scanner.getTokenPos();
-            var checkIdentifierEnd = scanner.getTextPos();
-            var identifierName = parseIdentifierName();
-            if (token === 116) {
-                node.propertyName = identifierName;
-                parseExpected(116);
-                checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
-                checkIdentifierStart = scanner.getTokenPos();
-                checkIdentifierEnd = scanner.getTextPos();
-                node.name = parseIdentifierName();
-            }
-            else {
-                node.name = identifierName;
-            }
-            if (kind === 234 && checkIdentifierIsKeyword) {
-                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
-            }
-            return finishNode(node);
-        }
-        function parseExportDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(236, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (parseOptional(37)) {
-                parseExpected(136);
-                node.moduleSpecifier = parseModuleSpecifier();
-            }
-            else {
-                node.exportClause = parseNamedImportsOrExports(237);
-                if (token === 136 || (token === 9 && !scanner.hasPrecedingLineBreak())) {
-                    parseExpected(136);
-                    node.moduleSpecifier = parseModuleSpecifier();
-                }
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseExportAssignment(fullStart, decorators, modifiers) {
-            var node = createNode(235, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (parseOptional(56)) {
-                node.isExportEquals = true;
-            }
-            else {
-                parseExpected(77);
-            }
-            node.expression = parseAssignmentExpressionOrHigher();
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function processReferenceComments(sourceFile) {
-            var triviaScanner = ts.createScanner(sourceFile.languageVersion, false, 0, sourceText);
-            var referencedFiles = [];
-            var typeReferenceDirectives = [];
-            var amdDependencies = [];
-            var amdModuleName;
-            while (true) {
-                var kind = triviaScanner.scan();
-                if (kind !== 2) {
-                    if (ts.isTrivia(kind)) {
-                        continue;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                var range = { pos: triviaScanner.getTokenPos(), end: triviaScanner.getTextPos(), kind: triviaScanner.getToken() };
-                var comment = sourceText.substring(range.pos, range.end);
-                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
-                if (referencePathMatchResult) {
-                    var fileReference = referencePathMatchResult.fileReference;
-                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
-                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
-                    if (fileReference) {
-                        if (referencePathMatchResult.isTypeReferenceDirective) {
-                            typeReferenceDirectives.push(fileReference);
-                        }
-                        else {
-                            referencedFiles.push(fileReference);
-                        }
-                    }
-                    if (diagnosticMessage) {
-                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
-                    }
-                }
-                else {
-                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
-                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
-                    if (amdModuleNameMatchResult) {
-                        if (amdModuleName) {
-                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
-                        }
-                        amdModuleName = amdModuleNameMatchResult[2];
-                    }
-                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
-                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
-                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
-                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
-                    if (amdDependencyMatchResult) {
-                        var pathMatchResult = pathRegex.exec(comment);
-                        var nameMatchResult = nameRegex.exec(comment);
-                        if (pathMatchResult) {
-                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
-                            amdDependencies.push(amdDependency);
-                        }
-                    }
-                }
-            }
-            sourceFile.referencedFiles = referencedFiles;
-            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
-            sourceFile.amdDependencies = amdDependencies;
-            sourceFile.moduleName = amdModuleName;
-        }
-        function setExternalModuleIndicator(sourceFile) {
-            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
-                return node.flags & 1
-                    || node.kind === 229 && node.moduleReference.kind === 240
-                    || node.kind === 230
-                    || node.kind === 235
-                    || node.kind === 236
-                    ? node
-                    : undefined;
-            });
-        }
-        var JSDocParser;
-        (function (JSDocParser) {
-            function isJSDocType() {
-                switch (token) {
-                    case 37:
-                    case 53:
-                    case 17:
-                    case 19:
-                    case 49:
-                    case 15:
-                    case 87:
-                    case 22:
-                    case 92:
-                    case 97:
-                        return true;
-                }
-                return ts.tokenIsIdentifierOrKeyword(token);
-            }
-            JSDocParser.isJSDocType = isJSDocType;
-            function parseJSDocTypeExpressionForTests(content, start, length) {
-                initializeState("file.js", content, 2, undefined, 1);
-                scanner.setText(content, start, length);
-                token = scanner.scan();
-                var jsDocTypeExpression = parseJSDocTypeExpression();
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
-            }
-            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-            function parseJSDocTypeExpression() {
-                var result = createNode(257, scanner.getTokenPos());
-                parseExpected(15);
-                result.type = parseJSDocTopLevelType();
-                parseExpected(16);
-                fixupParentReferences(result);
-                return finishNode(result);
-            }
-            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
-            function parseJSDocTopLevelType() {
-                var type = parseJSDocType();
-                if (token === 47) {
-                    var unionType = createNode(261, type.pos);
-                    unionType.types = parseJSDocTypeList(type);
-                    type = finishNode(unionType);
-                }
-                if (token === 56) {
-                    var optionalType = createNode(268, type.pos);
-                    nextToken();
-                    optionalType.type = type;
-                    type = finishNode(optionalType);
-                }
-                return type;
-            }
-            function parseJSDocType() {
-                var type = parseBasicTypeExpression();
-                while (true) {
-                    if (token === 19) {
-                        var arrayType = createNode(260, type.pos);
-                        arrayType.elementType = type;
-                        nextToken();
-                        parseExpected(20);
-                        type = finishNode(arrayType);
-                    }
-                    else if (token === 53) {
-                        var nullableType = createNode(263, type.pos);
-                        nullableType.type = type;
-                        nextToken();
-                        type = finishNode(nullableType);
-                    }
-                    else if (token === 49) {
-                        var nonNullableType = createNode(264, type.pos);
-                        nonNullableType.type = type;
-                        nextToken();
-                        type = finishNode(nonNullableType);
-                    }
-                    else {
-                        break;
-                    }
-                }
-                return type;
-            }
-            function parseBasicTypeExpression() {
-                switch (token) {
-                    case 37:
-                        return parseJSDocAllType();
-                    case 53:
-                        return parseJSDocUnknownOrNullableType();
-                    case 17:
-                        return parseJSDocUnionType();
-                    case 19:
-                        return parseJSDocTupleType();
-                    case 49:
-                        return parseJSDocNonNullableType();
-                    case 15:
-                        return parseJSDocRecordType();
-                    case 87:
-                        return parseJSDocFunctionType();
-                    case 22:
-                        return parseJSDocVariadicType();
-                    case 92:
-                        return parseJSDocConstructorType();
-                    case 97:
-                        return parseJSDocThisType();
-                    case 117:
-                    case 132:
-                    case 130:
-                    case 120:
-                    case 133:
-                    case 103:
-                        return parseTokenNode();
-                }
-                return parseJSDocTypeReference();
-            }
-            function parseJSDocThisType() {
-                var result = createNode(272);
-                nextToken();
-                parseExpected(54);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocConstructorType() {
-                var result = createNode(271);
-                nextToken();
-                parseExpected(54);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocVariadicType() {
-                var result = createNode(270);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocFunctionType() {
-                var result = createNode(269);
-                nextToken();
-                parseExpected(17);
-                result.parameters = parseDelimitedList(22, parseJSDocParameter);
-                checkForTrailingComma(result.parameters);
-                parseExpected(18);
-                if (token === 54) {
-                    nextToken();
-                    result.type = parseJSDocType();
-                }
-                return finishNode(result);
-            }
-            function parseJSDocParameter() {
-                var parameter = createNode(142);
-                parameter.type = parseJSDocType();
-                if (parseOptional(56)) {
-                    parameter.questionToken = createNode(56);
-                }
-                return finishNode(parameter);
-            }
-            function parseJSDocTypeReference() {
-                var result = createNode(267);
-                result.name = parseSimplePropertyName();
-                if (token === 25) {
-                    result.typeArguments = parseTypeArguments();
-                }
-                else {
-                    while (parseOptional(21)) {
-                        if (token === 25) {
-                            result.typeArguments = parseTypeArguments();
-                            break;
-                        }
-                        else {
-                            result.name = parseQualifiedName(result.name);
-                        }
-                    }
-                }
-                return finishNode(result);
-            }
-            function parseTypeArguments() {
-                nextToken();
-                var typeArguments = parseDelimitedList(23, parseJSDocType);
-                checkForTrailingComma(typeArguments);
-                checkForEmptyTypeArgumentList(typeArguments);
-                parseExpected(27);
-                return typeArguments;
-            }
-            function checkForEmptyTypeArgumentList(typeArguments) {
-                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
-                    var start = typeArguments.pos - "<".length;
-                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
-                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
-                }
-            }
-            function parseQualifiedName(left) {
-                var result = createNode(139, left.pos);
-                result.left = left;
-                result.right = parseIdentifierName();
-                return finishNode(result);
-            }
-            function parseJSDocRecordType() {
-                var result = createNode(265);
-                nextToken();
-                result.members = parseDelimitedList(24, parseJSDocRecordMember);
-                checkForTrailingComma(result.members);
-                parseExpected(16);
-                return finishNode(result);
-            }
-            function parseJSDocRecordMember() {
-                var result = createNode(266);
-                result.name = parseSimplePropertyName();
-                if (token === 54) {
-                    nextToken();
-                    result.type = parseJSDocType();
-                }
-                return finishNode(result);
-            }
-            function parseJSDocNonNullableType() {
-                var result = createNode(264);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocTupleType() {
-                var result = createNode(262);
-                nextToken();
-                result.types = parseDelimitedList(25, parseJSDocType);
-                checkForTrailingComma(result.types);
-                parseExpected(20);
-                return finishNode(result);
-            }
-            function checkForTrailingComma(list) {
-                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
-                    var start = list.end - ",".length;
-                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
-                }
-            }
-            function parseJSDocUnionType() {
-                var result = createNode(261);
-                nextToken();
-                result.types = parseJSDocTypeList(parseJSDocType());
-                parseExpected(18);
-                return finishNode(result);
-            }
-            function parseJSDocTypeList(firstType) {
-                ts.Debug.assert(!!firstType);
-                var types = [];
-                types.pos = firstType.pos;
-                types.push(firstType);
-                while (parseOptional(47)) {
-                    types.push(parseJSDocType());
-                }
-                types.end = scanner.getStartPos();
-                return types;
-            }
-            function parseJSDocAllType() {
-                var result = createNode(258);
-                nextToken();
-                return finishNode(result);
-            }
-            function parseJSDocUnknownOrNullableType() {
-                var pos = scanner.getStartPos();
-                nextToken();
-                if (token === 24 ||
-                    token === 16 ||
-                    token === 18 ||
-                    token === 27 ||
-                    token === 56 ||
-                    token === 47) {
-                    var result = createNode(259, pos);
-                    return finishNode(result);
-                }
-                else {
-                    var result = createNode(263, pos);
-                    result.type = parseJSDocType();
-                    return finishNode(result);
-                }
-            }
-            function parseIsolatedJSDocComment(content, start, length) {
-                initializeState("file.js", content, 2, undefined, 1);
-                sourceFile = { languageVariant: 0, text: content };
-                var jsDocComment = parseJSDocCommentWorker(start, length);
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDocComment ? { jsDocComment: jsDocComment, diagnostics: diagnostics } : undefined;
-            }
-            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-            function parseJSDocComment(parent, start, length) {
-                var saveToken = token;
-                var saveParseDiagnosticsLength = parseDiagnostics.length;
-                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-                var comment = parseJSDocCommentWorker(start, length);
-                if (comment) {
-                    comment.parent = parent;
-                }
-                token = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-                return comment;
-            }
-            JSDocParser.parseJSDocComment = parseJSDocComment;
-            function parseJSDocCommentWorker(start, length) {
-                var content = sourceText;
-                start = start || 0;
-                var end = length === undefined ? content.length : start + length;
-                length = end - start;
-                ts.Debug.assert(start >= 0);
-                ts.Debug.assert(start <= end);
-                ts.Debug.assert(end <= content.length);
-                var tags;
-                var result;
-                if (content.charCodeAt(start) === 47 &&
-                    content.charCodeAt(start + 1) === 42 &&
-                    content.charCodeAt(start + 2) === 42 &&
-                    content.charCodeAt(start + 3) !== 42) {
-                    scanner.scanRange(start + 3, length - 5, function () {
-                        var canParseTag = true;
-                        var seenAsterisk = true;
-                        nextJSDocToken();
-                        while (token !== 1) {
-                            switch (token) {
-                                case 55:
-                                    if (canParseTag) {
-                                        parseTag();
-                                    }
-                                    seenAsterisk = false;
-                                    break;
-                                case 4:
-                                    canParseTag = true;
-                                    seenAsterisk = false;
-                                    break;
-                                case 37:
-                                    if (seenAsterisk) {
-                                        canParseTag = false;
-                                    }
-                                    seenAsterisk = true;
-                                    break;
-                                case 69:
-                                    canParseTag = false;
-                                    break;
-                                case 1:
-                                    break;
-                            }
-                            nextJSDocToken();
-                        }
-                        result = createJSDocComment();
-                    });
-                }
-                return result;
-                function createJSDocComment() {
-                    if (!tags) {
-                        return undefined;
-                    }
-                    var result = createNode(273, start);
-                    result.tags = tags;
-                    return finishNode(result, end);
-                }
-                function skipWhitespace() {
-                    while (token === 5 || token === 4) {
-                        nextJSDocToken();
-                    }
-                }
-                function parseTag() {
-                    ts.Debug.assert(token === 55);
-                    var atToken = createNode(55, scanner.getTokenPos());
-                    atToken.end = scanner.getTextPos();
-                    nextJSDocToken();
-                    var tagName = parseJSDocIdentifierName();
-                    if (!tagName) {
-                        return;
-                    }
-                    var tag = handleTag(atToken, tagName) || handleUnknownTag(atToken, tagName);
-                    addTag(tag);
-                }
-                function handleTag(atToken, tagName) {
-                    if (tagName) {
-                        switch (tagName.text) {
-                            case "param":
-                                return handleParamTag(atToken, tagName);
-                            case "return":
-                            case "returns":
-                                return handleReturnTag(atToken, tagName);
-                            case "template":
-                                return handleTemplateTag(atToken, tagName);
-                            case "type":
-                                return handleTypeTag(atToken, tagName);
-                        }
-                    }
-                    return undefined;
-                }
-                function handleUnknownTag(atToken, tagName) {
-                    var result = createNode(274, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    return finishNode(result);
-                }
-                function addTag(tag) {
-                    if (tag) {
-                        if (!tags) {
-                            tags = [];
-                            tags.pos = tag.pos;
-                        }
-                        tags.push(tag);
-                        tags.end = tag.end;
-                    }
-                }
-                function tryParseTypeExpression() {
-                    if (token !== 15) {
-                        return undefined;
-                    }
-                    var typeExpression = parseJSDocTypeExpression();
-                    return typeExpression;
-                }
-                function handleParamTag(atToken, tagName) {
-                    var typeExpression = tryParseTypeExpression();
-                    skipWhitespace();
-                    var name;
-                    var isBracketed;
-                    if (parseOptionalToken(19)) {
-                        name = parseJSDocIdentifierName();
-                        isBracketed = true;
-                        if (parseOptionalToken(56)) {
-                            parseExpression();
-                        }
-                        parseExpected(20);
-                    }
-                    else if (ts.tokenIsIdentifierOrKeyword(token)) {
-                        name = parseJSDocIdentifierName();
-                    }
-                    if (!name) {
-                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var preName, postName;
-                    if (typeExpression) {
-                        postName = name;
-                    }
-                    else {
-                        preName = name;
-                    }
-                    if (!typeExpression) {
-                        typeExpression = tryParseTypeExpression();
-                    }
-                    var result = createNode(275, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.preParameterName = preName;
-                    result.typeExpression = typeExpression;
-                    result.postParameterName = postName;
-                    result.isBracketed = isBracketed;
-                    return finishNode(result);
-                }
-                function handleReturnTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 276; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(276, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
-                }
-                function handleTypeTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 277; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(277, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
-                }
-                function handleTemplateTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 278; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var typeParameters = [];
-                    typeParameters.pos = scanner.getStartPos();
-                    while (true) {
-                        var name_8 = parseJSDocIdentifierName();
-                        if (!name_8) {
-                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                            return undefined;
-                        }
-                        var typeParameter = createNode(141, name_8.pos);
-                        typeParameter.name = name_8;
-                        finishNode(typeParameter);
-                        typeParameters.push(typeParameter);
-                        if (token === 24) {
-                            nextJSDocToken();
-                        }
-                        else {
-                            break;
-                        }
-                    }
-                    var result = createNode(278, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeParameters = typeParameters;
-                    finishNode(result);
-                    typeParameters.end = result.end;
-                    return result;
-                }
-                function nextJSDocToken() {
-                    return token = scanner.scanJSDocToken();
-                }
-                function parseJSDocIdentifierName() {
-                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token));
-                }
-                function createJSDocIdentifier(isIdentifier) {
-                    if (!isIdentifier) {
-                        parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var pos = scanner.getTokenPos();
-                    var end = scanner.getTextPos();
-                    var result = createNode(69, pos);
-                    result.text = content.substring(pos, end);
-                    finishNode(result, end);
-                    nextJSDocToken();
-                    return result;
-                }
-            }
-            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
-        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
-    })(Parser || (Parser = {}));
-    var IncrementalParser;
-    (function (IncrementalParser) {
-        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2);
-            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
-            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
-                return sourceFile;
-            }
-            if (sourceFile.statements.length === 0) {
-                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, undefined, true, sourceFile.scriptKind);
-            }
-            var incrementalSourceFile = sourceFile;
-            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
-            incrementalSourceFile.hasBeenIncrementallyParsed = true;
-            var oldText = sourceFile.text;
-            var syntaxCursor = createSyntaxCursor(sourceFile);
-            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
-            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
-            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
-            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
-            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
-            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
-            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
-            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, true, sourceFile.scriptKind);
-            return result;
-        }
-        IncrementalParser.updateSourceFile = updateSourceFile;
-        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
-            if (isArray) {
-                visitArray(element);
-            }
-            else {
-                visitNode(element);
-            }
-            return;
-            function visitNode(node) {
-                var text = "";
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    text = oldText.substring(node.pos, node.end);
-                }
-                if (node._children) {
-                    node._children = undefined;
-                }
-                if (node.jsDocComment) {
-                    node.jsDocComment = undefined;
-                }
-                node.pos += delta;
-                node.end += delta;
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
-                }
-                forEachChild(node, visitNode, visitArray);
-                checkNodePositions(node, aggressiveChecks);
-            }
-            function visitArray(array) {
-                array._children = undefined;
-                array.pos += delta;
-                array.end += delta;
-                for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
-                    var node = array_7[_i];
-                    visitNode(node);
-                }
-            }
-        }
-        function shouldCheckNode(node) {
-            switch (node.kind) {
-                case 9:
-                case 8:
-                case 69:
-                    return true;
-            }
-            return false;
-        }
-        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
-            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
-            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
-            ts.Debug.assert(element.pos <= element.end);
-            element.pos = Math.min(element.pos, changeRangeNewEnd);
-            if (element.end >= changeRangeOldEnd) {
-                element.end += delta;
-            }
-            else {
-                element.end = Math.min(element.end, changeRangeNewEnd);
-            }
-            ts.Debug.assert(element.pos <= element.end);
-            if (element.parent) {
-                ts.Debug.assert(element.pos >= element.parent.pos);
-                ts.Debug.assert(element.end <= element.parent.end);
-            }
-        }
-        function checkNodePositions(node, aggressiveChecks) {
-            if (aggressiveChecks) {
-                var pos_2 = node.pos;
-                forEachChild(node, function (child) {
-                    ts.Debug.assert(child.pos >= pos_2);
-                    pos_2 = child.end;
-                });
-                ts.Debug.assert(pos_2 <= node.end);
-            }
-        }
-        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
-            visitNode(sourceFile);
-            return;
-            function visitNode(child) {
-                ts.Debug.assert(child.pos <= child.end);
-                if (child.pos > changeRangeOldEnd) {
-                    moveElementEntirelyPastChangeRange(child, false, delta, oldText, newText, aggressiveChecks);
-                    return;
-                }
-                var fullEnd = child.end;
-                if (fullEnd >= changeStart) {
-                    child.intersectsChange = true;
-                    child._children = undefined;
-                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    forEachChild(child, visitNode, visitArray);
-                    checkNodePositions(child, aggressiveChecks);
-                    return;
-                }
-                ts.Debug.assert(fullEnd < changeStart);
-            }
-            function visitArray(array) {
-                ts.Debug.assert(array.pos <= array.end);
-                if (array.pos > changeRangeOldEnd) {
-                    moveElementEntirelyPastChangeRange(array, true, delta, oldText, newText, aggressiveChecks);
-                    return;
-                }
-                var fullEnd = array.end;
-                if (fullEnd >= changeStart) {
-                    array.intersectsChange = true;
-                    array._children = undefined;
-                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
-                        var node = array_8[_i];
-                        visitNode(node);
-                    }
-                    return;
-                }
-                ts.Debug.assert(fullEnd < changeStart);
-            }
-        }
-        function extendToAffectedRange(sourceFile, changeRange) {
-            var maxLookahead = 1;
-            var start = changeRange.span.start;
-            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
-                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
-                ts.Debug.assert(nearestNode.pos <= start);
-                var position = nearestNode.pos;
-                start = Math.max(0, position - 1);
-            }
-            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
-            var finalLength = changeRange.newLength + (changeRange.span.start - start);
-            return ts.createTextChangeRange(finalSpan, finalLength);
-        }
-        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
-            var bestResult = sourceFile;
-            var lastNodeEntirelyBeforePosition;
-            forEachChild(sourceFile, visit);
-            if (lastNodeEntirelyBeforePosition) {
-                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
-                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
-                    bestResult = lastChildOfLastEntireNodeBeforePosition;
-                }
-            }
-            return bestResult;
-            function getLastChild(node) {
-                while (true) {
-                    var lastChild = getLastChildWorker(node);
-                    if (lastChild) {
-                        node = lastChild;
-                    }
-                    else {
-                        return node;
-                    }
-                }
-            }
-            function getLastChildWorker(node) {
-                var last = undefined;
-                forEachChild(node, function (child) {
-                    if (ts.nodeIsPresent(child)) {
-                        last = child;
-                    }
-                });
-                return last;
-            }
-            function visit(child) {
-                if (ts.nodeIsMissing(child)) {
-                    return;
-                }
-                if (child.pos <= position) {
-                    if (child.pos >= bestResult.pos) {
-                        bestResult = child;
-                    }
-                    if (position < child.end) {
-                        forEachChild(child, visit);
-                        return true;
-                    }
-                    else {
-                        ts.Debug.assert(child.end <= position);
-                        lastNodeEntirelyBeforePosition = child;
-                    }
-                }
-                else {
-                    ts.Debug.assert(child.pos > position);
-                    return true;
-                }
-            }
-        }
-        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            var oldText = sourceFile.text;
-            if (textChangeRange) {
-                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
-                if (aggressiveChecks || ts.Debug.shouldAssert(3)) {
-                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
-                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
-                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
-                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
-                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
-                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
-                }
-            }
-        }
-        function createSyntaxCursor(sourceFile) {
-            var currentArray = sourceFile.statements;
-            var currentArrayIndex = 0;
-            ts.Debug.assert(currentArrayIndex < currentArray.length);
-            var current = currentArray[currentArrayIndex];
-            var lastQueriedPosition = -1;
-            return {
-                currentNode: function (position) {
-                    if (position !== lastQueriedPosition) {
-                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
-                            currentArrayIndex++;
-                            current = currentArray[currentArrayIndex];
-                        }
-                        if (!current || current.pos !== position) {
-                            findHighestListElementThatStartsAtPosition(position);
-                        }
-                    }
-                    lastQueriedPosition = position;
-                    ts.Debug.assert(!current || current.pos === position);
-                    return current;
-                }
-            };
-            function findHighestListElementThatStartsAtPosition(position) {
-                currentArray = undefined;
-                currentArrayIndex = -1;
-                current = undefined;
-                forEachChild(sourceFile, visitNode, visitArray);
-                return;
-                function visitNode(node) {
-                    if (position >= node.pos && position < node.end) {
-                        forEachChild(node, visitNode, visitArray);
-                        return true;
-                    }
-                    return false;
-                }
-                function visitArray(array) {
-                    if (position >= array.pos && position < array.end) {
-                        for (var i = 0, n = array.length; i < n; i++) {
-                            var child = array[i];
-                            if (child) {
-                                if (child.pos === position) {
-                                    currentArray = array;
-                                    currentArrayIndex = i;
-                                    current = child;
-                                    return true;
-                                }
-                                else {
-                                    if (child.pos < position && position < child.end) {
-                                        forEachChild(child, visitNode, visitArray);
-                                        return true;
-                                    }
-                                }
-                            }
-                        }
-                    }
-                    return false;
-                }
-            }
-        }
-    })(IncrementalParser || (IncrementalParser = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.bindTime = 0;
-    function getModuleInstanceState(node) {
-        if (node.kind === 222 || node.kind === 223) {
-            return 0;
-        }
-        else if (ts.isConstEnumDeclaration(node)) {
-            return 2;
-        }
-        else if ((node.kind === 230 || node.kind === 229) && !(node.flags & 1)) {
-            return 0;
-        }
-        else if (node.kind === 226) {
-            var state_1 = 0;
-            ts.forEachChild(node, function (n) {
-                switch (getModuleInstanceState(n)) {
-                    case 0:
-                        return false;
-                    case 2:
-                        state_1 = 2;
-                        return false;
-                    case 1:
-                        state_1 = 1;
-                        return true;
-                }
-            });
-            return state_1;
-        }
-        else if (node.kind === 225) {
-            return getModuleInstanceState(node.body);
-        }
-        else {
-            return 1;
-        }
-    }
-    ts.getModuleInstanceState = getModuleInstanceState;
-    var binder = createBinder();
-    function bindSourceFile(file, options) {
-        var start = new Date().getTime();
-        binder(file, options);
-        ts.bindTime += new Date().getTime() - start;
-    }
-    ts.bindSourceFile = bindSourceFile;
-    function createBinder() {
-        var file;
-        var options;
-        var languageVersion;
-        var parent;
-        var container;
-        var blockScopeContainer;
-        var lastContainer;
-        var seenThisKeyword;
-        var hasExplicitReturn;
-        var currentFlow;
-        var currentBreakTarget;
-        var currentContinueTarget;
-        var currentTrueTarget;
-        var currentFalseTarget;
-        var preSwitchCaseFlow;
-        var activeLabels;
-        var hasClassExtends;
-        var hasAsyncFunctions;
-        var hasDecorators;
-        var hasParameterDecorators;
-        var hasJsxSpreadAttribute;
-        var inStrictMode;
-        var symbolCount = 0;
-        var Symbol;
-        var classifiableNames;
-        var unreachableFlow = { flags: 1 };
-        var reportedUnreachableFlow = { flags: 1 };
-        function bindSourceFile(f, opts) {
-            file = f;
-            options = opts;
-            languageVersion = ts.getEmitScriptTarget(options);
-            inStrictMode = !!file.externalModuleIndicator;
-            classifiableNames = {};
-            symbolCount = 0;
-            Symbol = ts.objectAllocator.getSymbolConstructor();
-            if (!file.locals) {
-                bind(file);
-                file.symbolCount = symbolCount;
-                file.classifiableNames = classifiableNames;
-            }
-            file = undefined;
-            options = undefined;
-            languageVersion = undefined;
-            parent = undefined;
-            container = undefined;
-            blockScopeContainer = undefined;
-            lastContainer = undefined;
-            seenThisKeyword = false;
-            hasExplicitReturn = false;
-            currentFlow = undefined;
-            currentBreakTarget = undefined;
-            currentContinueTarget = undefined;
-            currentTrueTarget = undefined;
-            currentFalseTarget = undefined;
-            activeLabels = undefined;
-            hasClassExtends = false;
-            hasAsyncFunctions = false;
-            hasDecorators = false;
-            hasParameterDecorators = false;
-            hasJsxSpreadAttribute = false;
-        }
-        return bindSourceFile;
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
-        }
-        function addDeclarationToSymbol(symbol, node, symbolFlags) {
-            symbol.flags |= symbolFlags;
-            node.symbol = symbol;
-            if (!symbol.declarations) {
-                symbol.declarations = [];
-            }
-            symbol.declarations.push(node);
-            if (symbolFlags & 1952 && !symbol.exports) {
-                symbol.exports = {};
-            }
-            if (symbolFlags & 6240 && !symbol.members) {
-                symbol.members = {};
-            }
-            if (symbolFlags & 107455) {
-                var valueDeclaration = symbol.valueDeclaration;
-                if (!valueDeclaration ||
-                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 225)) {
-                    symbol.valueDeclaration = node;
-                }
-            }
-        }
-        function getDeclarationName(node) {
-            if (node.name) {
-                if (ts.isAmbientModule(node)) {
-                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
-                }
-                if (node.name.kind === 140) {
-                    var nameExpression = node.name.expression;
-                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
-                        return nameExpression.text;
-                    }
-                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
-                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
-                }
-                return node.name.text;
-            }
-            switch (node.kind) {
-                case 148:
-                    return "__constructor";
-                case 156:
-                case 151:
-                    return "__call";
-                case 157:
-                case 152:
-                    return "__new";
-                case 153:
-                    return "__index";
-                case 236:
-                    return "__export";
-                case 235:
-                    return node.isExportEquals ? "export=" : "default";
-                case 187:
-                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
-                        case 2:
-                            return "export=";
-                        case 1:
-                        case 4:
-                            return node.left.name.text;
-                        case 3:
-                            return node.left.expression.name.text;
-                    }
-                    ts.Debug.fail("Unknown binary declaration kind");
-                    break;
-                case 220:
-                case 221:
-                    return node.flags & 512 ? "default" : undefined;
-                case 269:
-                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
-                case 142:
-                    ts.Debug.assert(node.parent.kind === 269);
-                    var functionType = node.parent;
-                    var index = ts.indexOf(functionType.parameters, node);
-                    return "p" + index;
-            }
-        }
-        function getDisplayName(node) {
-            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
-        }
-        function declareSymbol(symbolTable, parent, node, includes, excludes) {
-            ts.Debug.assert(!ts.hasDynamicName(node));
-            var isDefaultExport = node.flags & 512;
-            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
-            var symbol;
-            if (name !== undefined) {
-                symbol = ts.hasProperty(symbolTable, name)
-                    ? symbolTable[name]
-                    : (symbolTable[name] = createSymbol(0, name));
-                if (name && (includes & 788448)) {
-                    classifiableNames[name] = name;
-                }
-                if (symbol.flags & excludes) {
-                    if (node.name) {
-                        node.name.parent = node;
-                    }
-                    var message_1 = symbol.flags & 2
-                        ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
-                        : ts.Diagnostics.Duplicate_identifier_0;
-                    ts.forEach(symbol.declarations, function (declaration) {
-                        if (declaration.flags & 512) {
-                            message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
-                        }
-                    });
-                    ts.forEach(symbol.declarations, function (declaration) {
-                        file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
-                    });
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
-                    symbol = createSymbol(0, name);
-                }
-            }
-            else {
-                symbol = createSymbol(0, "__missing");
-            }
-            addDeclarationToSymbol(symbol, node, includes);
-            symbol.parent = parent;
-            return symbol;
-        }
-        function declareModuleMember(node, symbolFlags, symbolExcludes) {
-            var hasExportModifier = ts.getCombinedNodeFlags(node) & 1;
-            if (symbolFlags & 8388608) {
-                if (node.kind === 238 || (node.kind === 229 && hasExportModifier)) {
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-                }
-            }
-            else {
-                if (!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 8192)) {
-                    var exportKind = (symbolFlags & 107455 ? 1048576 : 0) |
-                        (symbolFlags & 793056 ? 2097152 : 0) |
-                        (symbolFlags & 1536 ? 4194304 : 0);
-                    var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
-                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                    node.localSymbol = local;
-                    return local;
-                }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-                }
-            }
-        }
-        function bindChildren(node) {
-            var saveParent = parent;
-            var saveContainer = container;
-            var savedBlockScopeContainer = blockScopeContainer;
-            parent = node;
-            var containerFlags = getContainerFlags(node);
-            if (containerFlags & 1) {
-                container = blockScopeContainer = node;
-                if (containerFlags & 4) {
-                    container.locals = {};
-                }
-                addToContainerChain(container);
-            }
-            else if (containerFlags & 2) {
-                blockScopeContainer = node;
-                blockScopeContainer.locals = undefined;
-            }
-            var savedHasExplicitReturn;
-            var savedCurrentFlow;
-            var savedBreakTarget;
-            var savedContinueTarget;
-            var savedActiveLabels;
-            var kind = node.kind;
-            var flags = node.flags;
-            flags &= ~98304;
-            flags &= ~3932160;
-            if (kind === 222) {
-                seenThisKeyword = false;
-            }
-            var saveState = kind === 256 || kind === 226 || ts.isFunctionLikeKind(kind);
-            if (saveState) {
-                savedHasExplicitReturn = hasExplicitReturn;
-                savedCurrentFlow = currentFlow;
-                savedBreakTarget = currentBreakTarget;
-                savedContinueTarget = currentContinueTarget;
-                savedActiveLabels = activeLabels;
-                hasExplicitReturn = false;
-                currentFlow = { flags: 2 };
-                currentBreakTarget = undefined;
-                currentContinueTarget = undefined;
-                activeLabels = undefined;
-            }
-            if (ts.isInJavaScriptFile(node) && node.jsDocComment) {
-                bind(node.jsDocComment);
-            }
-            bindReachableStatement(node);
-            if (!(currentFlow.flags & 1) && ts.isFunctionLikeKind(kind) && ts.nodeIsPresent(node.body)) {
-                flags |= 32768;
-                if (hasExplicitReturn) {
-                    flags |= 65536;
-                }
-            }
-            if (kind === 222) {
-                flags = seenThisKeyword ? flags | 16384 : flags & ~16384;
-            }
-            if (kind === 256) {
-                if (hasClassExtends) {
-                    flags |= 262144;
-                }
-                if (hasDecorators) {
-                    flags |= 524288;
-                }
-                if (hasParameterDecorators) {
-                    flags |= 1048576;
-                }
-                if (hasAsyncFunctions) {
-                    flags |= 2097152;
-                }
-                if (hasJsxSpreadAttribute) {
-                    flags |= 1073741824;
-                }
-            }
-            node.flags = flags;
-            if (saveState) {
-                hasExplicitReturn = savedHasExplicitReturn;
-                currentFlow = savedCurrentFlow;
-                currentBreakTarget = savedBreakTarget;
-                currentContinueTarget = savedContinueTarget;
-                activeLabels = savedActiveLabels;
-            }
-            container = saveContainer;
-            parent = saveParent;
-            blockScopeContainer = savedBlockScopeContainer;
-        }
-        function bindReachableStatement(node) {
-            if (checkUnreachable(node)) {
-                ts.forEachChild(node, bind);
-                return;
-            }
-            switch (node.kind) {
-                case 205:
-                    bindWhileStatement(node);
-                    break;
-                case 204:
-                    bindDoStatement(node);
-                    break;
-                case 206:
-                    bindForStatement(node);
-                    break;
-                case 207:
-                case 208:
-                    bindForInOrForOfStatement(node);
-                    break;
-                case 203:
-                    bindIfStatement(node);
-                    break;
-                case 211:
-                case 215:
-                    bindReturnOrThrow(node);
-                    break;
-                case 210:
-                case 209:
-                    bindBreakOrContinueStatement(node);
-                    break;
-                case 216:
-                    bindTryStatement(node);
-                    break;
-                case 213:
-                    bindSwitchStatement(node);
-                    break;
-                case 227:
-                    bindCaseBlock(node);
-                    break;
-                case 214:
-                    bindLabeledStatement(node);
-                    break;
-                case 185:
-                    bindPrefixUnaryExpressionFlow(node);
-                    break;
-                case 187:
-                    bindBinaryExpressionFlow(node);
-                    break;
-                case 181:
-                    bindDeleteExpressionFlow(node);
-                    break;
-                case 188:
-                    bindConditionalExpressionFlow(node);
-                    break;
-                case 218:
-                    bindVariableDeclarationFlow(node);
-                    break;
-                default:
-                    ts.forEachChild(node, bind);
-                    break;
-            }
-        }
-        function isNarrowableReference(expr) {
-            return expr.kind === 69 ||
-                expr.kind === 97 ||
-                expr.kind === 172 && isNarrowableReference(expr.expression);
-        }
-        function isNarrowingExpression(expr) {
-            switch (expr.kind) {
-                case 69:
-                case 97:
-                case 172:
-                    return isNarrowableReference(expr);
-                case 174:
-                    return true;
-                case 178:
-                    return isNarrowingExpression(expr.expression);
-                case 187:
-                    return isNarrowingBinaryExpression(expr);
-                case 185:
-                    return expr.operator === 49 && isNarrowingExpression(expr.operand);
-            }
-            return false;
-        }
-        function isNarrowingBinaryExpression(expr) {
-            switch (expr.operatorToken.kind) {
-                case 56:
-                    return isNarrowableReference(expr.left);
-                case 30:
-                case 31:
-                case 32:
-                case 33:
-                    if (isNarrowingExpression(expr.left) && (expr.right.kind === 93 || expr.right.kind === 69)) {
-                        return true;
-                    }
-                    if (expr.left.kind === 182 && isNarrowingExpression(expr.left.expression) && expr.right.kind === 9) {
-                        return true;
-                    }
-                    return false;
-                case 91:
-                    return isNarrowingExpression(expr.left);
-                case 24:
-                    return isNarrowingExpression(expr.right);
-            }
-            return false;
-        }
-        function createBranchLabel() {
-            return {
-                flags: 4,
-                antecedents: undefined
-            };
-        }
-        function createLoopLabel() {
-            return {
-                flags: 8,
-                antecedents: undefined
-            };
-        }
-        function setFlowNodeReferenced(flow) {
-            flow.flags |= flow.flags & 128 ? 256 : 128;
-        }
-        function addAntecedent(label, antecedent) {
-            if (!(antecedent.flags & 1) && !ts.contains(label.antecedents, antecedent)) {
-                (label.antecedents || (label.antecedents = [])).push(antecedent);
-                setFlowNodeReferenced(antecedent);
-            }
-        }
-        function createFlowCondition(flags, antecedent, expression) {
-            if (antecedent.flags & 1) {
-                return antecedent;
-            }
-            if (!expression) {
-                return flags & 32 ? antecedent : unreachableFlow;
-            }
-            if (expression.kind === 99 && flags & 64 ||
-                expression.kind === 84 && flags & 32) {
-                return unreachableFlow;
-            }
-            if (!isNarrowingExpression(expression)) {
-                return antecedent;
-            }
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: flags,
-                antecedent: antecedent,
-                expression: expression
-            };
-        }
-        function createFlowAssignment(antecedent, node) {
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: 16,
-                antecedent: antecedent,
-                node: node
-            };
-        }
-        function finishFlowLabel(flow) {
-            var antecedents = flow.antecedents;
-            if (!antecedents) {
-                return unreachableFlow;
-            }
-            if (antecedents.length === 1) {
-                return antecedents[0];
-            }
-            return flow;
-        }
-        function isStatementCondition(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 203:
-                case 205:
-                case 204:
-                    return parent.expression === node;
-                case 206:
-                case 188:
-                    return parent.condition === node;
-            }
-            return false;
-        }
-        function isLogicalExpression(node) {
-            while (true) {
-                if (node.kind === 178) {
-                    node = node.expression;
-                }
-                else if (node.kind === 185 && node.operator === 49) {
-                    node = node.operand;
-                }
-                else {
-                    return node.kind === 187 && (node.operatorToken.kind === 51 ||
-                        node.operatorToken.kind === 52);
-                }
-            }
-        }
-        function isTopLevelLogicalExpression(node) {
-            while (node.parent.kind === 178 ||
-                node.parent.kind === 185 &&
-                    node.parent.operator === 49) {
-                node = node.parent;
-            }
-            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
-        }
-        function bindCondition(node, trueTarget, falseTarget) {
-            var saveTrueTarget = currentTrueTarget;
-            var saveFalseTarget = currentFalseTarget;
-            currentTrueTarget = trueTarget;
-            currentFalseTarget = falseTarget;
-            bind(node);
-            currentTrueTarget = saveTrueTarget;
-            currentFalseTarget = saveFalseTarget;
-            if (!node || !isLogicalExpression(node)) {
-                addAntecedent(trueTarget, createFlowCondition(32, currentFlow, node));
-                addAntecedent(falseTarget, createFlowCondition(64, currentFlow, node));
-            }
-        }
-        function bindIterativeStatement(node, breakTarget, continueTarget) {
-            var saveBreakTarget = currentBreakTarget;
-            var saveContinueTarget = currentContinueTarget;
-            currentBreakTarget = breakTarget;
-            currentContinueTarget = continueTarget;
-            bind(node);
-            currentBreakTarget = saveBreakTarget;
-            currentContinueTarget = saveContinueTarget;
-        }
-        function bindWhileStatement(node) {
-            var preWhileLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postWhileLabel = createBranchLabel();
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = preWhileLabel;
-            bindCondition(node.expression, preBodyLabel, postWhileLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = finishFlowLabel(postWhileLabel);
-        }
-        function bindDoStatement(node) {
-            var preDoLabel = createLoopLabel();
-            var preConditionLabel = createBranchLabel();
-            var postDoLabel = createBranchLabel();
-            addAntecedent(preDoLabel, currentFlow);
-            currentFlow = preDoLabel;
-            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
-            addAntecedent(preConditionLabel, currentFlow);
-            currentFlow = finishFlowLabel(preConditionLabel);
-            bindCondition(node.expression, preDoLabel, postDoLabel);
-            currentFlow = finishFlowLabel(postDoLabel);
-        }
-        function bindForStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postLoopLabel = createBranchLabel();
-            bind(node.initializer);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bindCondition(node.condition, preBodyLabel, postLoopLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            bind(node.incrementor);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindForInOrForOfStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var postLoopLabel = createBranchLabel();
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bind(node.expression);
-            addAntecedent(postLoopLabel, currentFlow);
-            bind(node.initializer);
-            if (node.initializer.kind !== 219) {
-                bindAssignmentTargetFlow(node.initializer);
-            }
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindIfStatement(node) {
-            var thenLabel = createBranchLabel();
-            var elseLabel = createBranchLabel();
-            var postIfLabel = createBranchLabel();
-            bindCondition(node.expression, thenLabel, elseLabel);
-            currentFlow = finishFlowLabel(thenLabel);
-            bind(node.thenStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(elseLabel);
-            bind(node.elseStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(postIfLabel);
-        }
-        function bindReturnOrThrow(node) {
-            bind(node.expression);
-            if (node.kind === 211) {
-                hasExplicitReturn = true;
-            }
-            currentFlow = unreachableFlow;
-        }
-        function findActiveLabel(name) {
-            if (activeLabels) {
-                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
-                    var label = activeLabels_1[_i];
-                    if (label.name === name) {
-                        return label;
-                    }
-                }
-            }
-            return undefined;
-        }
-        function bindbreakOrContinueFlow(node, breakTarget, continueTarget) {
-            var flowLabel = node.kind === 210 ? breakTarget : continueTarget;
-            if (flowLabel) {
-                addAntecedent(flowLabel, currentFlow);
-                currentFlow = unreachableFlow;
-            }
-        }
-        function bindBreakOrContinueStatement(node) {
-            bind(node.label);
-            if (node.label) {
-                var activeLabel = findActiveLabel(node.label.text);
-                if (activeLabel) {
-                    activeLabel.referenced = true;
-                    bindbreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
-                }
-            }
-            else {
-                bindbreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
-            }
-        }
-        function bindTryStatement(node) {
-            var postFinallyLabel = createBranchLabel();
-            var preTryFlow = currentFlow;
-            bind(node.tryBlock);
-            addAntecedent(postFinallyLabel, currentFlow);
-            if (node.catchClause) {
-                currentFlow = preTryFlow;
-                bind(node.catchClause);
-                addAntecedent(postFinallyLabel, currentFlow);
-            }
-            if (node.finallyBlock) {
-                currentFlow = preTryFlow;
-                bind(node.finallyBlock);
-            }
-            currentFlow = finishFlowLabel(postFinallyLabel);
-        }
-        function bindSwitchStatement(node) {
-            var postSwitchLabel = createBranchLabel();
-            bind(node.expression);
-            var saveBreakTarget = currentBreakTarget;
-            var savePreSwitchCaseFlow = preSwitchCaseFlow;
-            currentBreakTarget = postSwitchLabel;
-            preSwitchCaseFlow = currentFlow;
-            bind(node.caseBlock);
-            addAntecedent(postSwitchLabel, currentFlow);
-            var hasDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 250; });
-            if (!hasDefault) {
-                addAntecedent(postSwitchLabel, preSwitchCaseFlow);
-            }
-            currentBreakTarget = saveBreakTarget;
-            preSwitchCaseFlow = savePreSwitchCaseFlow;
-            currentFlow = finishFlowLabel(postSwitchLabel);
-        }
-        function bindCaseBlock(node) {
-            var clauses = node.clauses;
-            for (var i = 0; i < clauses.length; i++) {
-                var clause = clauses[i];
-                if (clause.statements.length) {
-                    if (currentFlow.flags & 1) {
-                        currentFlow = preSwitchCaseFlow;
-                    }
-                    else {
-                        var preCaseLabel = createBranchLabel();
-                        addAntecedent(preCaseLabel, preSwitchCaseFlow);
-                        addAntecedent(preCaseLabel, currentFlow);
-                        currentFlow = finishFlowLabel(preCaseLabel);
-                    }
-                    bind(clause);
-                    if (!(currentFlow.flags & 1) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
-                        errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
-                    }
-                }
-                else {
-                    bind(clause);
-                }
-            }
-        }
-        function pushActiveLabel(name, breakTarget, continueTarget) {
-            var activeLabel = {
-                name: name,
-                breakTarget: breakTarget,
-                continueTarget: continueTarget,
-                referenced: false
-            };
-            (activeLabels || (activeLabels = [])).push(activeLabel);
-            return activeLabel;
-        }
-        function popActiveLabel() {
-            activeLabels.pop();
-        }
-        function bindLabeledStatement(node) {
-            var preStatementLabel = createLoopLabel();
-            var postStatementLabel = createBranchLabel();
-            bind(node.label);
-            addAntecedent(preStatementLabel, currentFlow);
-            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
-            bind(node.statement);
-            popActiveLabel();
-            if (!activeLabel.referenced && !options.allowUnusedLabels) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
-            }
-            addAntecedent(postStatementLabel, currentFlow);
-            currentFlow = finishFlowLabel(postStatementLabel);
-        }
-        function bindDestructuringTargetFlow(node) {
-            if (node.kind === 187 && node.operatorToken.kind === 56) {
-                bindAssignmentTargetFlow(node.left);
-            }
-            else {
-                bindAssignmentTargetFlow(node);
-            }
-        }
-        function bindAssignmentTargetFlow(node) {
-            if (isNarrowableReference(node)) {
-                currentFlow = createFlowAssignment(currentFlow, node);
-            }
-            else if (node.kind === 170) {
-                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
-                    var e = _a[_i];
-                    if (e.kind === 191) {
-                        bindAssignmentTargetFlow(e.expression);
-                    }
-                    else {
-                        bindDestructuringTargetFlow(e);
-                    }
-                }
-            }
-            else if (node.kind === 171) {
-                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
-                    var p = _c[_b];
-                    if (p.kind === 253) {
-                        bindDestructuringTargetFlow(p.initializer);
-                    }
-                    else if (p.kind === 254) {
-                        bindAssignmentTargetFlow(p.name);
-                    }
-                }
-            }
-        }
-        function bindLogicalExpression(node, trueTarget, falseTarget) {
-            var preRightLabel = createBranchLabel();
-            if (node.operatorToken.kind === 51) {
-                bindCondition(node.left, preRightLabel, falseTarget);
-            }
-            else {
-                bindCondition(node.left, trueTarget, preRightLabel);
-            }
-            currentFlow = finishFlowLabel(preRightLabel);
-            bind(node.operatorToken);
-            bindCondition(node.right, trueTarget, falseTarget);
-        }
-        function bindPrefixUnaryExpressionFlow(node) {
-            if (node.operator === 49) {
-                var saveTrueTarget = currentTrueTarget;
-                currentTrueTarget = currentFalseTarget;
-                currentFalseTarget = saveTrueTarget;
-                ts.forEachChild(node, bind);
-                currentFalseTarget = currentTrueTarget;
-                currentTrueTarget = saveTrueTarget;
-            }
-            else {
-                ts.forEachChild(node, bind);
-            }
-        }
-        function bindBinaryExpressionFlow(node) {
-            var operator = node.operatorToken.kind;
-            if (operator === 51 || operator === 52) {
-                if (isTopLevelLogicalExpression(node)) {
-                    var postExpressionLabel = createBranchLabel();
-                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
-                    currentFlow = finishFlowLabel(postExpressionLabel);
-                }
-                else {
-                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
-                }
-            }
-            else {
-                ts.forEachChild(node, bind);
-                if (operator === 56 && !ts.isAssignmentTarget(node)) {
-                    bindAssignmentTargetFlow(node.left);
-                }
-            }
-        }
-        function bindDeleteExpressionFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.expression.kind === 172) {
-                bindAssignmentTargetFlow(node.expression);
-            }
-        }
-        function bindConditionalExpressionFlow(node) {
-            var trueLabel = createBranchLabel();
-            var falseLabel = createBranchLabel();
-            var postExpressionLabel = createBranchLabel();
-            bindCondition(node.condition, trueLabel, falseLabel);
-            currentFlow = finishFlowLabel(trueLabel);
-            bind(node.whenTrue);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(falseLabel);
-            bind(node.whenFalse);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(postExpressionLabel);
-        }
-        function bindInitializedVariableFlow(node) {
-            var name = node.name;
-            if (ts.isBindingPattern(name)) {
-                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
-                    var child = _a[_i];
-                    bindInitializedVariableFlow(child);
-                }
-            }
-            else {
-                currentFlow = createFlowAssignment(currentFlow, node);
-            }
-        }
-        function bindVariableDeclarationFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.initializer || node.parent.parent.kind === 207 || node.parent.parent.kind === 208) {
-                bindInitializedVariableFlow(node);
-            }
-        }
-        function getContainerFlags(node) {
-            switch (node.kind) {
-                case 192:
-                case 221:
-                case 222:
-                case 224:
-                case 171:
-                case 159:
-                case 265:
-                    return 1;
-                case 151:
-                case 152:
-                case 153:
-                case 147:
-                case 146:
-                case 220:
-                case 148:
-                case 149:
-                case 150:
-                case 156:
-                case 269:
-                case 157:
-                case 179:
-                case 180:
-                case 225:
-                case 256:
-                case 223:
-                    return 5;
-                case 252:
-                case 206:
-                case 207:
-                case 208:
-                case 227:
-                    return 2;
-                case 199:
-                    return ts.isFunctionLike(node.parent) ? 0 : 2;
-            }
-            return 0;
-        }
-        function addToContainerChain(next) {
-            if (lastContainer) {
-                lastContainer.nextContainer = next;
-            }
-            lastContainer = next;
-        }
-        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
-            declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
-        }
-        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
-            switch (container.kind) {
-                case 225:
-                    return declareModuleMember(node, symbolFlags, symbolExcludes);
-                case 256:
-                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
-                case 192:
-                case 221:
-                    return declareClassMember(node, symbolFlags, symbolExcludes);
-                case 224:
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                case 159:
-                case 171:
-                case 222:
-                case 265:
-                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
-                case 156:
-                case 157:
-                case 151:
-                case 152:
-                case 153:
-                case 147:
-                case 146:
-                case 148:
-                case 149:
-                case 150:
-                case 220:
-                case 179:
-                case 180:
-                case 269:
-                case 223:
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-            }
-        }
-        function declareClassMember(node, symbolFlags, symbolExcludes) {
-            return node.flags & 32
-                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
-                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
-        }
-        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
-            return ts.isExternalModule(file)
-                ? declareModuleMember(node, symbolFlags, symbolExcludes)
-                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
-        }
-        function hasExportDeclarations(node) {
-            var body = node.kind === 256 ? node : node.body;
-            if (body.kind === 256 || body.kind === 226) {
-                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
-                    var stat = _a[_i];
-                    if (stat.kind === 236 || stat.kind === 235) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function setExportContextFlag(node) {
-            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
-                node.flags |= 8192;
-            }
-            else {
-                node.flags &= ~8192;
-            }
-        }
-        function bindModuleDeclaration(node) {
-            setExportContextFlag(node);
-            if (ts.isAmbientModule(node)) {
-                if (node.flags & 1) {
-                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
-                }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    declareSymbolAndAddToSymbolTable(node, 1024, 0);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 512, 106639);
-                }
-            }
-            else {
-                var state = getModuleInstanceState(node);
-                if (state === 0) {
-                    declareSymbolAndAddToSymbolTable(node, 1024, 0);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 512, 106639);
-                    if (node.symbol.flags & (16 | 32 | 256)) {
-                        node.symbol.constEnumOnlyModule = false;
-                    }
-                    else {
-                        var currentModuleIsConstEnumOnly = state === 2;
-                        if (node.symbol.constEnumOnlyModule === undefined) {
-                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
-                        }
-                        else {
-                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
-                        }
-                    }
-                }
-            }
-        }
-        function bindFunctionOrConstructorType(node) {
-            var symbol = createSymbol(131072, getDeclarationName(node));
-            addDeclarationToSymbol(symbol, node, 131072);
-            var typeLiteralSymbol = createSymbol(2048, "__type");
-            addDeclarationToSymbol(typeLiteralSymbol, node, 2048);
-            typeLiteralSymbol.members = (_a = {}, _a[symbol.name] = symbol, _a);
-            var _a;
-        }
-        function bindObjectLiteralExpression(node) {
-            if (inStrictMode) {
-                var seen = {};
-                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (prop.name.kind !== 69) {
-                        continue;
-                    }
-                    var identifier = prop.name;
-                    var currentKind = prop.kind === 253 || prop.kind === 254 || prop.kind === 147
-                        ? 1
-                        : 2;
-                    var existingKind = seen[identifier.text];
-                    if (!existingKind) {
-                        seen[identifier.text] = currentKind;
-                        continue;
-                    }
-                    if (currentKind === 1 && existingKind === 1) {
-                        var span = ts.getErrorSpanForNode(file, identifier);
-                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
-                    }
-                }
-            }
-            return bindAnonymousDeclaration(node, 4096, "__object");
-        }
-        function bindAnonymousDeclaration(node, symbolFlags, name) {
-            var symbol = createSymbol(symbolFlags, name);
-            addDeclarationToSymbol(symbol, node, symbolFlags);
-        }
-        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
-            switch (blockScopeContainer.kind) {
-                case 225:
-                    declareModuleMember(node, symbolFlags, symbolExcludes);
-                    break;
-                case 256:
-                    if (ts.isExternalModule(container)) {
-                        declareModuleMember(node, symbolFlags, symbolExcludes);
-                        break;
-                    }
-                default:
-                    if (!blockScopeContainer.locals) {
-                        blockScopeContainer.locals = {};
-                        addToContainerChain(blockScopeContainer);
-                    }
-                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
-            }
-        }
-        function bindBlockScopedVariableDeclaration(node) {
-            bindBlockScopedDeclaration(node, 2, 107455);
-        }
-        function checkStrictModeIdentifier(node) {
-            if (inStrictMode &&
-                node.originalKeywordKind >= 106 &&
-                node.originalKeywordKind <= 114 &&
-                !ts.isIdentifierName(node) &&
-                !ts.isInAmbientContext(node)) {
-                if (!file.parseDiagnostics.length) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
-                }
-            }
-        }
-        function getStrictModeIdentifierMessage(node) {
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
-        }
-        function checkStrictModeBinaryExpression(node) {
-            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
-                checkStrictModeEvalOrArguments(node, node.left);
-            }
-        }
-        function checkStrictModeCatchClause(node) {
-            if (inStrictMode && node.variableDeclaration) {
-                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
-            }
-        }
-        function checkStrictModeDeleteExpression(node) {
-            if (inStrictMode && node.expression.kind === 69) {
-                var span = ts.getErrorSpanForNode(file, node.expression);
-                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
-            }
-        }
-        function isEvalOrArgumentsIdentifier(node) {
-            return node.kind === 69 &&
-                (node.text === "eval" || node.text === "arguments");
-        }
-        function checkStrictModeEvalOrArguments(contextNode, name) {
-            if (name && name.kind === 69) {
-                var identifier = name;
-                if (isEvalOrArgumentsIdentifier(identifier)) {
-                    var span = ts.getErrorSpanForNode(file, name);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
-                }
-            }
-        }
-        function getStrictModeEvalOrArgumentsMessage(node) {
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
-        }
-        function checkStrictModeFunctionName(node) {
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-        }
-        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
-        }
-        function checkStrictModeFunctionDeclaration(node) {
-            if (languageVersion < 2) {
-                if (blockScopeContainer.kind !== 256 &&
-                    blockScopeContainer.kind !== 225 &&
-                    !ts.isFunctionLike(blockScopeContainer)) {
-                    var errorSpan = ts.getErrorSpanForNode(file, node);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
-                }
-            }
-        }
-        function checkStrictModeNumericLiteral(node) {
-            if (inStrictMode && node.isOctalLiteral) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
-            }
-        }
-        function checkStrictModePostfixUnaryExpression(node) {
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.operand);
-            }
-        }
-        function checkStrictModePrefixUnaryExpression(node) {
-            if (inStrictMode) {
-                if (node.operator === 41 || node.operator === 42) {
-                    checkStrictModeEvalOrArguments(node, node.operand);
-                }
-            }
-        }
-        function checkStrictModeWithStatement(node) {
-            if (inStrictMode) {
-                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
-            }
-        }
-        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
-            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
-        }
-        function getDestructuringParameterName(node) {
-            return "__" + ts.indexOf(node.parent.parameters, node);
-        }
-        function bind(node) {
-            if (!node) {
-                return;
-            }
-            node.parent = parent;
-            var savedInStrictMode = inStrictMode;
-            if (!savedInStrictMode) {
-                updateStrictMode(node);
-            }
-            bindWorker(node);
-            bindChildren(node);
-            inStrictMode = savedInStrictMode;
-        }
-        function updateStrictMode(node) {
-            switch (node.kind) {
-                case 256:
-                case 226:
-                    updateStrictModeStatementList(node.statements);
-                    return;
-                case 199:
-                    if (ts.isFunctionLike(node.parent)) {
-                        updateStrictModeStatementList(node.statements);
-                    }
-                    return;
-                case 221:
-                case 192:
-                    inStrictMode = true;
-                    return;
-            }
-        }
-        function updateStrictModeStatementList(statements) {
-            for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
-                var statement = statements_1[_i];
-                if (!ts.isPrologueDirective(statement)) {
-                    return;
-                }
-                if (isUseStrictPrologueDirective(statement)) {
-                    inStrictMode = true;
-                    return;
-                }
-            }
-        }
-        function isUseStrictPrologueDirective(node) {
-            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
-            return nodeText === '"use strict"' || nodeText === "'use strict'";
-        }
-        function bindWorker(node) {
-            switch (node.kind) {
-                case 69:
-                case 97:
-                    if (currentFlow && (ts.isExpression(node) || parent.kind === 254)) {
-                        node.flowNode = currentFlow;
-                    }
-                    return checkStrictModeIdentifier(node);
-                case 172:
-                    if (currentFlow && isNarrowableReference(node)) {
-                        node.flowNode = currentFlow;
-                    }
-                    break;
-                case 187:
-                    if (ts.isInJavaScriptFile(node)) {
-                        var specialKind = ts.getSpecialPropertyAssignmentKind(node);
-                        switch (specialKind) {
-                            case 1:
-                                bindExportsPropertyAssignment(node);
-                                break;
-                            case 2:
-                                bindModuleExportsAssignment(node);
-                                break;
-                            case 3:
-                                bindPrototypePropertyAssignment(node);
-                                break;
-                            case 4:
-                                bindThisPropertyAssignment(node);
-                                break;
-                            case 0:
-                                break;
-                            default:
-                                ts.Debug.fail("Unknown special property assignment kind");
-                        }
-                    }
-                    return checkStrictModeBinaryExpression(node);
-                case 252:
-                    return checkStrictModeCatchClause(node);
-                case 181:
-                    return checkStrictModeDeleteExpression(node);
-                case 8:
-                    return checkStrictModeNumericLiteral(node);
-                case 186:
-                    return checkStrictModePostfixUnaryExpression(node);
-                case 185:
-                    return checkStrictModePrefixUnaryExpression(node);
-                case 212:
-                    return checkStrictModeWithStatement(node);
-                case 165:
-                    seenThisKeyword = true;
-                    return;
-                case 154:
-                    return checkTypePredicate(node);
-                case 141:
-                    return declareSymbolAndAddToSymbolTable(node, 262144, 530912);
-                case 142:
-                    return bindParameter(node);
-                case 218:
-                case 169:
-                    return bindVariableDeclarationOrBindingElement(node);
-                case 145:
-                case 144:
-                case 266:
-                    return bindPropertyOrMethodOrAccessor(node, 4 | (node.questionToken ? 536870912 : 0), 0);
-                case 253:
-                case 254:
-                    return bindPropertyOrMethodOrAccessor(node, 4, 0);
-                case 255:
-                    return bindPropertyOrMethodOrAccessor(node, 8, 107455);
-                case 247:
-                    hasJsxSpreadAttribute = true;
-                    return;
-                case 151:
-                case 152:
-                case 153:
-                    return declareSymbolAndAddToSymbolTable(node, 131072, 0);
-                case 147:
-                case 146:
-                    return bindPropertyOrMethodOrAccessor(node, 8192 | (node.questionToken ? 536870912 : 0), ts.isObjectLiteralMethod(node) ? 0 : 99263);
-                case 220:
-                    return bindFunctionDeclaration(node);
-                case 148:
-                    return declareSymbolAndAddToSymbolTable(node, 16384, 0);
-                case 149:
-                    return bindPropertyOrMethodOrAccessor(node, 32768, 41919);
-                case 150:
-                    return bindPropertyOrMethodOrAccessor(node, 65536, 74687);
-                case 156:
-                case 157:
-                case 269:
-                    return bindFunctionOrConstructorType(node);
-                case 159:
-                case 265:
-                    return bindAnonymousDeclaration(node, 2048, "__type");
-                case 171:
-                    return bindObjectLiteralExpression(node);
-                case 179:
-                case 180:
-                    return bindFunctionExpression(node);
-                case 174:
-                    if (ts.isInJavaScriptFile(node)) {
-                        bindCallExpression(node);
-                    }
-                    break;
-                case 192:
-                case 221:
-                    return bindClassLikeDeclaration(node);
-                case 222:
-                    return bindBlockScopedDeclaration(node, 64, 792960);
-                case 223:
-                    return bindBlockScopedDeclaration(node, 524288, 793056);
-                case 224:
-                    return bindEnumDeclaration(node);
-                case 225:
-                    return bindModuleDeclaration(node);
-                case 229:
-                case 232:
-                case 234:
-                case 238:
-                    return declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
-                case 228:
-                    return bindNamespaceExportDeclaration(node);
-                case 231:
-                    return bindImportClause(node);
-                case 236:
-                    return bindExportDeclaration(node);
-                case 235:
-                    return bindExportAssignment(node);
-                case 256:
-                    return bindSourceFileIfExternalModule();
-            }
-        }
-        function checkTypePredicate(node) {
-            var parameterName = node.parameterName, type = node.type;
-            if (parameterName && parameterName.kind === 69) {
-                checkStrictModeIdentifier(parameterName);
-            }
-            if (parameterName && parameterName.kind === 165) {
-                seenThisKeyword = true;
-            }
-            bind(type);
-        }
-        function bindSourceFileIfExternalModule() {
-            setExportContextFlag(file);
-            if (ts.isExternalModule(file)) {
-                bindSourceFileAsExternalModule();
-            }
-        }
-        function bindSourceFileAsExternalModule() {
-            bindAnonymousDeclaration(file, 512, "\"" + ts.removeFileExtension(file.fileName) + "\"");
-        }
-        function bindExportAssignment(node) {
-            var boundExpression = node.kind === 235 ? node.expression : node.right;
-            if (!container.symbol || !container.symbol.exports) {
-                bindAnonymousDeclaration(node, 8388608, getDeclarationName(node));
-            }
-            else if (boundExpression.kind === 69 && node.kind === 235) {
-                declareSymbol(container.symbol.exports, container.symbol, node, 8388608, 0 | 8388608);
-            }
-            else {
-                declareSymbol(container.symbol.exports, container.symbol, node, 4, 0 | 8388608);
-            }
-        }
-        function bindNamespaceExportDeclaration(node) {
-            if (node.modifiers && node.modifiers.length) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
-            }
-            if (node.parent.kind !== 256) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
-                return;
-            }
-            else {
-                var parent_5 = node.parent;
-                if (!ts.isExternalModule(parent_5)) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
-                    return;
-                }
-                if (!parent_5.isDeclarationFile) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
-                    return;
-                }
-            }
-            file.symbol.globalExports = file.symbol.globalExports || {};
-            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608, 8388608);
-        }
-        function bindExportDeclaration(node) {
-            if (!container.symbol || !container.symbol.exports) {
-                bindAnonymousDeclaration(node, 1073741824, getDeclarationName(node));
-            }
-            else if (!node.exportClause) {
-                declareSymbol(container.symbol.exports, container.symbol, node, 1073741824, 0);
-            }
-        }
-        function bindImportClause(node) {
-            if (node.name) {
-                declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
-            }
-        }
-        function setCommonJsModuleIndicator(node) {
-            if (!file.commonJsModuleIndicator) {
-                file.commonJsModuleIndicator = node;
-                bindSourceFileAsExternalModule();
-            }
-        }
-        function bindExportsPropertyAssignment(node) {
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 | 7340032, 0);
-        }
-        function bindModuleExportsAssignment(node) {
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node, 4 | 7340032 | 512, 0);
-        }
-        function bindThisPropertyAssignment(node) {
-            if (container.kind === 179 || container.kind === 220) {
-                container.symbol.members = container.symbol.members || {};
-                declareSymbol(container.symbol.members, container.symbol, node, 4, 0 & ~4);
-            }
-        }
-        function bindPrototypePropertyAssignment(node) {
-            var leftSideOfAssignment = node.left;
-            var classPrototype = leftSideOfAssignment.expression;
-            var constructorFunction = classPrototype.expression;
-            leftSideOfAssignment.parent = node;
-            constructorFunction.parent = classPrototype;
-            classPrototype.parent = leftSideOfAssignment;
-            var funcSymbol = container.locals[constructorFunction.text];
-            if (!funcSymbol || !(funcSymbol.flags & 16)) {
-                return;
-            }
-            if (!funcSymbol.members) {
-                funcSymbol.members = {};
-            }
-            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4, 0);
-        }
-        function bindCallExpression(node) {
-            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, false)) {
-                setCommonJsModuleIndicator(node);
-            }
-        }
-        function bindClassLikeDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.getClassExtendsHeritageClauseElement(node) !== undefined) {
-                    hasClassExtends = true;
-                }
-                if (ts.nodeIsDecorated(node)) {
-                    hasDecorators = true;
-                }
-            }
-            if (node.kind === 221) {
-                bindBlockScopedDeclaration(node, 32, 899519);
-            }
-            else {
-                var bindingName = node.name ? node.name.text : "__class";
-                bindAnonymousDeclaration(node, 32, bindingName);
-                if (node.name) {
-                    classifiableNames[node.name.text] = node.name.text;
-                }
-            }
-            var symbol = node.symbol;
-            var prototypeSymbol = createSymbol(4 | 134217728, "prototype");
-            if (ts.hasProperty(symbol.exports, prototypeSymbol.name)) {
-                if (node.name) {
-                    node.name.parent = node;
-                }
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
-            }
-            symbol.exports[prototypeSymbol.name] = prototypeSymbol;
-            prototypeSymbol.parent = symbol;
-        }
-        function bindEnumDeclaration(node) {
-            return ts.isConst(node)
-                ? bindBlockScopedDeclaration(node, 128, 899967)
-                : bindBlockScopedDeclaration(node, 256, 899327);
-        }
-        function bindVariableDeclarationOrBindingElement(node) {
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-            if (!ts.isBindingPattern(node.name)) {
-                if (ts.isBlockOrCatchScoped(node)) {
-                    bindBlockScopedVariableDeclaration(node);
-                }
-                else if (ts.isParameterDeclaration(node)) {
-                    declareSymbolAndAddToSymbolTable(node, 1, 107455);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 1, 107454);
-                }
-            }
-        }
-        function bindParameter(node) {
-            if (!ts.isDeclarationFile(file) &&
-                !ts.isInAmbientContext(node) &&
-                ts.nodeIsDecorated(node)) {
-                hasDecorators = true;
-                hasParameterDecorators = true;
-            }
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-            if (ts.isBindingPattern(node.name)) {
-                bindAnonymousDeclaration(node, 1, getDestructuringParameterName(node));
-            }
-            else {
-                declareSymbolAndAddToSymbolTable(node, 1, 107455);
-            }
-            if (ts.isParameterPropertyDeclaration(node)) {
-                var classDeclaration = node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4, 0);
-            }
-        }
-        function bindFunctionDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-            }
-            checkStrictModeFunctionName(node);
-            if (inStrictMode) {
-                checkStrictModeFunctionDeclaration(node);
-                return bindBlockScopedDeclaration(node, 16, 106927);
-            }
-            else {
-                return declareSymbolAndAddToSymbolTable(node, 16, 106927);
-            }
-        }
-        function bindFunctionExpression(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-            }
-            checkStrictModeFunctionName(node);
-            var bindingName = node.name ? node.name.text : "__function";
-            return bindAnonymousDeclaration(node, 16, bindingName);
-        }
-        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-                if (ts.nodeIsDecorated(node)) {
-                    hasDecorators = true;
-                }
-            }
-            return ts.hasDynamicName(node)
-                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
-                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
-        }
-        function shouldReportErrorOnModuleDeclaration(node) {
-            var instanceState = getModuleInstanceState(node);
-            return instanceState === 1 || (instanceState === 2 && options.preserveConstEnums);
-        }
-        function checkUnreachable(node) {
-            if (!(currentFlow.flags & 1)) {
-                return false;
-            }
-            if (currentFlow === unreachableFlow) {
-                var reportError = (ts.isStatement(node) && node.kind !== 201) ||
-                    node.kind === 221 ||
-                    (node.kind === 225 && shouldReportErrorOnModuleDeclaration(node)) ||
-                    (node.kind === 224 && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
-                if (reportError) {
-                    currentFlow = reportedUnreachableFlow;
-                    var reportUnreachableCode = !options.allowUnreachableCode &&
-                        !ts.isInAmbientContext(node) &&
-                        (node.kind !== 200 ||
-                            ts.getCombinedNodeFlags(node.declarationList) & 3072 ||
-                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
-                    if (reportUnreachableCode) {
-                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
-                    }
-                }
-            }
-            return true;
-        }
-    }
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var nextSymbolId = 1;
-    var nextNodeId = 1;
-    var nextMergeId = 1;
-    var nextFlowId = 1;
-    function getNodeId(node) {
-        if (!node.id) {
-            node.id = nextNodeId;
-            nextNodeId++;
-        }
-        return node.id;
-    }
-    ts.getNodeId = getNodeId;
-    ts.checkTime = 0;
-    function getSymbolId(symbol) {
-        if (!symbol.id) {
-            symbol.id = nextSymbolId;
-            nextSymbolId++;
-        }
-        return symbol.id;
-    }
-    ts.getSymbolId = getSymbolId;
-    function createTypeChecker(host, produceDiagnostics) {
-        var cancellationToken;
-        var Symbol = ts.objectAllocator.getSymbolConstructor();
-        var Type = ts.objectAllocator.getTypeConstructor();
-        var Signature = ts.objectAllocator.getSignatureConstructor();
-        var typeCount = 0;
-        var symbolCount = 0;
-        var emptyArray = [];
-        var emptySymbols = {};
-        var compilerOptions = host.getCompilerOptions();
-        var languageVersion = compilerOptions.target || 0;
-        var modulekind = ts.getEmitModuleKind(compilerOptions);
-        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
-        var strictNullChecks = compilerOptions.strictNullChecks;
-        var emitResolver = createResolver();
-        var undefinedSymbol = createSymbol(4 | 67108864, "undefined");
-        undefinedSymbol.declarations = [];
-        var argumentsSymbol = createSymbol(4 | 67108864, "arguments");
-        var checker = {
-            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
-            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
-            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
-            getTypeCount: function () { return typeCount; },
-            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
-            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
-            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
-            getDiagnostics: getDiagnostics,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getTypeOfSymbolAtLocation: getTypeOfSymbolAtLocation,
-            getSymbolsOfParameterPropertyDeclaration: getSymbolsOfParameterPropertyDeclaration,
-            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
-            getPropertiesOfType: getPropertiesOfType,
-            getPropertyOfType: getPropertyOfType,
-            getSignaturesOfType: getSignaturesOfType,
-            getIndexTypeOfType: getIndexTypeOfType,
-            getBaseTypes: getBaseTypes,
-            getReturnTypeOfSignature: getReturnTypeOfSignature,
-            getNonNullableType: getNonNullableType,
-            getSymbolsInScope: getSymbolsInScope,
-            getSymbolAtLocation: getSymbolAtLocation,
-            getShorthandAssignmentValueSymbol: getShorthandAssignmentValueSymbol,
-            getExportSpecifierLocalTargetSymbol: getExportSpecifierLocalTargetSymbol,
-            getTypeAtLocation: getTypeOfNode,
-            getPropertySymbolOfDestructuringAssignment: getPropertySymbolOfDestructuringAssignment,
-            typeToString: typeToString,
-            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
-            symbolToString: symbolToString,
-            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
-            getRootSymbols: getRootSymbols,
-            getContextualType: getContextualType,
-            getFullyQualifiedName: getFullyQualifiedName,
-            getResolvedSignature: getResolvedSignature,
-            getConstantValue: getConstantValue,
-            isValidPropertyAccess: isValidPropertyAccess,
-            getSignatureFromDeclaration: getSignatureFromDeclaration,
-            isImplementationOfOverload: isImplementationOfOverload,
-            getAliasedSymbol: resolveAlias,
-            getEmitResolver: getEmitResolver,
-            getExportsOfModule: getExportsOfModuleAsArray,
-            getJsxElementAttributesType: getJsxElementAttributesType,
-            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
-            isOptionalParameter: isOptionalParameter
-        };
-        var unknownSymbol = createSymbol(4 | 67108864, "unknown");
-        var resolvingSymbol = createSymbol(67108864, "__resolving__");
-        var nullableWideningFlags = strictNullChecks ? 0 : 2097152;
-        var anyType = createIntrinsicType(1, "any");
-        var stringType = createIntrinsicType(2, "string");
-        var numberType = createIntrinsicType(4, "number");
-        var booleanType = createIntrinsicType(8, "boolean");
-        var esSymbolType = createIntrinsicType(16777216, "symbol");
-        var voidType = createIntrinsicType(16, "void");
-        var undefinedType = createIntrinsicType(32 | nullableWideningFlags, "undefined");
-        var nullType = createIntrinsicType(64 | nullableWideningFlags, "null");
-        var emptyArrayElementType = createIntrinsicType(32 | 2097152, "undefined");
-        var unknownType = createIntrinsicType(1, "unknown");
-        var neverType = createIntrinsicType(134217728, "never");
-        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        emptyGenericType.instantiations = {};
-        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        anyFunctionType.flags |= 8388608;
-        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, undefined, 0, false, false);
-        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, undefined, 0, false, false);
-        var enumNumberIndexInfo = createIndexInfo(stringType, true);
-        var globals = {};
-        var getGlobalESSymbolConstructorSymbol;
-        var getGlobalPromiseConstructorSymbol;
-        var globalObjectType;
-        var globalFunctionType;
-        var globalArrayType;
-        var globalReadonlyArrayType;
-        var globalStringType;
-        var globalNumberType;
-        var globalBooleanType;
-        var globalRegExpType;
-        var anyArrayType;
-        var anyReadonlyArrayType;
-        var getGlobalTemplateStringsArrayType;
-        var getGlobalESSymbolType;
-        var getGlobalIterableType;
-        var getGlobalIteratorType;
-        var getGlobalIterableIteratorType;
-        var getGlobalClassDecoratorType;
-        var getGlobalParameterDecoratorType;
-        var getGlobalPropertyDecoratorType;
-        var getGlobalMethodDecoratorType;
-        var getGlobalTypedPropertyDescriptorType;
-        var getGlobalPromiseType;
-        var tryGetGlobalPromiseType;
-        var getGlobalPromiseLikeType;
-        var getInstantiatedGlobalPromiseLikeType;
-        var getGlobalPromiseConstructorLikeType;
-        var getGlobalThenableType;
-        var jsxElementClassType;
-        var deferredNodes;
-        var flowLoopStart = 0;
-        var flowLoopCount = 0;
-        var visitedFlowCount = 0;
-        var tupleTypes = {};
-        var unionTypes = {};
-        var intersectionTypes = {};
-        var stringLiteralTypes = {};
-        var resolutionTargets = [];
-        var resolutionResults = [];
-        var resolutionPropertyNames = [];
-        var mergedSymbols = [];
-        var symbolLinks = [];
-        var nodeLinks = [];
-        var flowLoopCaches = [];
-        var flowLoopNodes = [];
-        var flowLoopKeys = [];
-        var flowLoopTypes = [];
-        var visitedFlowNodes = [];
-        var visitedFlowTypes = [];
-        var potentialThisCollisions = [];
-        var awaitedTypeStack = [];
-        var diagnostics = ts.createDiagnosticCollection();
-        var typeofEQFacts = {
-            "string": 1,
-            "number": 2,
-            "boolean": 4,
-            "symbol": 8,
-            "undefined": 16384,
-            "object": 16,
-            "function": 32
-        };
-        var typeofNEFacts = {
-            "string": 128,
-            "number": 256,
-            "boolean": 512,
-            "symbol": 1024,
-            "undefined": 131072,
-            "object": 2048,
-            "function": 4096
-        };
-        var typeofTypesByName = {
-            "string": stringType,
-            "number": numberType,
-            "boolean": booleanType,
-            "symbol": esSymbolType,
-            "undefined": undefinedType
-        };
-        var jsxElementType;
-        var jsxTypes = {};
-        var JsxNames = {
-            JSX: "JSX",
-            IntrinsicElements: "IntrinsicElements",
-            ElementClass: "ElementClass",
-            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
-            Element: "Element",
-            IntrinsicAttributes: "IntrinsicAttributes",
-            IntrinsicClassAttributes: "IntrinsicClassAttributes"
-        };
-        var subtypeRelation = {};
-        var assignableRelation = {};
-        var comparableRelation = {};
-        var identityRelation = {};
-        var _displayBuilder;
-        var builtinGlobals = (_a = {},
-            _a[undefinedSymbol.name] = undefinedSymbol,
-            _a
-        );
-        initializeTypeChecker();
-        return checker;
-        function getEmitResolver(sourceFile, cancellationToken) {
-            getDiagnostics(sourceFile, cancellationToken);
-            return emitResolver;
-        }
-        function error(location, message, arg0, arg1, arg2) {
-            var diagnostic = location
-                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
-                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
-            diagnostics.add(diagnostic);
-        }
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
-        }
-        function getExcludedSymbolFlags(flags) {
-            var result = 0;
-            if (flags & 2)
-                result |= 107455;
-            if (flags & 1)
-                result |= 107454;
-            if (flags & 4)
-                result |= 0;
-            if (flags & 8)
-                result |= 107455;
-            if (flags & 16)
-                result |= 106927;
-            if (flags & 32)
-                result |= 899519;
-            if (flags & 64)
-                result |= 792960;
-            if (flags & 256)
-                result |= 899327;
-            if (flags & 128)
-                result |= 899967;
-            if (flags & 512)
-                result |= 106639;
-            if (flags & 8192)
-                result |= 99263;
-            if (flags & 32768)
-                result |= 41919;
-            if (flags & 65536)
-                result |= 74687;
-            if (flags & 262144)
-                result |= 530912;
-            if (flags & 524288)
-                result |= 793056;
-            if (flags & 8388608)
-                result |= 8388608;
-            return result;
-        }
-        function recordMergedSymbol(target, source) {
-            if (!source.mergeId) {
-                source.mergeId = nextMergeId;
-                nextMergeId++;
-            }
-            mergedSymbols[source.mergeId] = target;
-        }
-        function cloneSymbol(symbol) {
-            var result = createSymbol(symbol.flags | 33554432, symbol.name);
-            result.declarations = symbol.declarations.slice(0);
-            result.parent = symbol.parent;
-            if (symbol.valueDeclaration)
-                result.valueDeclaration = symbol.valueDeclaration;
-            if (symbol.constEnumOnlyModule)
-                result.constEnumOnlyModule = true;
-            if (symbol.members)
-                result.members = cloneSymbolTable(symbol.members);
-            if (symbol.exports)
-                result.exports = cloneSymbolTable(symbol.exports);
-            recordMergedSymbol(result, symbol);
-            return result;
-        }
-        function mergeSymbol(target, source) {
-            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
-                if (source.flags & 512 && target.flags & 512 && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
-                    target.constEnumOnlyModule = false;
-                }
-                target.flags |= source.flags;
-                if (source.valueDeclaration &&
-                    (!target.valueDeclaration ||
-                        (target.valueDeclaration.kind === 225 && source.valueDeclaration.kind !== 225))) {
-                    target.valueDeclaration = source.valueDeclaration;
-                }
-                ts.forEach(source.declarations, function (node) {
-                    target.declarations.push(node);
-                });
-                if (source.members) {
-                    if (!target.members)
-                        target.members = {};
-                    mergeSymbolTable(target.members, source.members);
-                }
-                if (source.exports) {
-                    if (!target.exports)
-                        target.exports = {};
-                    mergeSymbolTable(target.exports, source.exports);
-                }
-                recordMergedSymbol(target, source);
-            }
-            else {
-                var message_2 = target.flags & 2 || source.flags & 2
-                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
-                ts.forEach(source.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
-                ts.forEach(target.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
-            }
-        }
-        function cloneSymbolTable(symbolTable) {
-            var result = {};
-            for (var id in symbolTable) {
-                if (ts.hasProperty(symbolTable, id)) {
-                    result[id] = symbolTable[id];
-                }
-            }
-            return result;
-        }
-        function mergeSymbolTable(target, source) {
-            for (var id in source) {
-                if (ts.hasProperty(source, id)) {
-                    if (!ts.hasProperty(target, id)) {
-                        target[id] = source[id];
-                    }
-                    else {
-                        var symbol = target[id];
-                        if (!(symbol.flags & 33554432)) {
-                            target[id] = symbol = cloneSymbol(symbol);
-                        }
-                        mergeSymbol(symbol, source[id]);
-                    }
-                }
-            }
-        }
-        function mergeModuleAugmentation(moduleName) {
-            var moduleAugmentation = moduleName.parent;
-            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
-                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
-                return;
-            }
-            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
-                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
-            }
-            else {
-                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
-                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
-                    : undefined;
-                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError);
-                if (!mainModule) {
-                    return;
-                }
-                mainModule = resolveExternalModuleSymbol(mainModule);
-                if (mainModule.flags & 1536) {
-                    mainModule = mainModule.flags & 33554432 ? mainModule : cloneSymbol(mainModule);
-                    mergeSymbol(mainModule, moduleAugmentation.symbol);
-                }
-                else {
-                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
-                }
-            }
-        }
-        function addToSymbolTable(target, source, message) {
-            for (var id in source) {
-                if (ts.hasProperty(source, id)) {
-                    if (ts.hasProperty(target, id)) {
-                        ts.forEach(target[id].declarations, addDeclarationDiagnostic(id, message));
-                    }
-                    else {
-                        target[id] = source[id];
-                    }
-                }
-            }
-            function addDeclarationDiagnostic(id, message) {
-                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
-            }
-        }
-        function getSymbolLinks(symbol) {
-            if (symbol.flags & 67108864)
-                return symbol;
-            var id = getSymbolId(symbol);
-            return symbolLinks[id] || (symbolLinks[id] = {});
-        }
-        function getNodeLinks(node) {
-            var nodeId = getNodeId(node);
-            return nodeLinks[nodeId] || (nodeLinks[nodeId] = {});
-        }
-        function isGlobalSourceFile(node) {
-            return node.kind === 256 && !ts.isExternalOrCommonJsModule(node);
-        }
-        function getSymbol(symbols, name, meaning) {
-            if (meaning && ts.hasProperty(symbols, name)) {
-                var symbol = symbols[name];
-                ts.Debug.assert((symbol.flags & 16777216) === 0, "Should never get an instantiated symbol here.");
-                if (symbol.flags & meaning) {
-                    return symbol;
-                }
-                if (symbol.flags & 8388608) {
-                    var target = resolveAlias(symbol);
-                    if (target === unknownSymbol || target.flags & meaning) {
-                        return symbol;
-                    }
-                }
-            }
-        }
-        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
-            var constructorDeclaration = parameter.parent;
-            var classDeclaration = parameter.parent.parent;
-            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455);
-            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455);
-            if (parameterSymbol && propertySymbol) {
-                return [parameterSymbol, propertySymbol];
-            }
-            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
-        }
-        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
-            var declarationFile = ts.getSourceFileOfNode(declaration);
-            var useFile = ts.getSourceFileOfNode(usage);
-            if (declarationFile !== useFile) {
-                if (modulekind || (!compilerOptions.outFile && !compilerOptions.out)) {
-                    return true;
-                }
-                var sourceFiles = host.getSourceFiles();
-                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
-            }
-            if (declaration.pos <= usage.pos) {
-                return declaration.kind !== 218 ||
-                    !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
-            }
-            return isUsedInFunctionOrNonStaticProperty(declaration, usage);
-            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                switch (declaration.parent.parent.kind) {
-                    case 200:
-                    case 206:
-                    case 208:
-                        if (isSameScopeDescendentOf(usage, declaration, container)) {
-                            return true;
-                        }
-                        break;
-                }
-                switch (declaration.parent.parent.kind) {
-                    case 207:
-                    case 208:
-                        if (isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container)) {
-                            return true;
-                        }
-                }
-                return false;
-            }
-            function isUsedInFunctionOrNonStaticProperty(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                var current = usage;
-                while (current) {
-                    if (current === container) {
-                        return false;
-                    }
-                    if (ts.isFunctionLike(current)) {
-                        return true;
-                    }
-                    var initializerOfNonStaticProperty = current.parent &&
-                        current.parent.kind === 145 &&
-                        (current.parent.flags & 32) === 0 &&
-                        current.parent.initializer === current;
-                    if (initializerOfNonStaticProperty) {
-                        return true;
-                    }
-                    current = current.parent;
-                }
-                return false;
-            }
-        }
-        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg) {
-            var result;
-            var lastLocation;
-            var propertyWithInvalidInitializer;
-            var errorLocation = location;
-            var grandparent;
-            var isInExternalModule = false;
-            loop: while (location) {
-                if (location.locals && !isGlobalSourceFile(location)) {
-                    if (result = getSymbol(location.locals, name, meaning)) {
-                        var useResult = true;
-                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
-                            if (meaning & result.flags & 793056 && lastLocation.kind !== 273) {
-                                useResult = result.flags & 262144
-                                    ? lastLocation === location.type ||
-                                        lastLocation.kind === 142 ||
-                                        lastLocation.kind === 141
-                                    : false;
-                            }
-                            if (meaning & 107455 && result.flags & 1) {
-                                useResult =
-                                    lastLocation.kind === 142 ||
-                                        (lastLocation === location.type &&
-                                            result.valueDeclaration.kind === 142);
-                            }
-                        }
-                        if (useResult) {
-                            break loop;
-                        }
-                        else {
-                            result = undefined;
-                        }
-                    }
-                }
-                switch (location.kind) {
-                    case 256:
-                        if (!ts.isExternalOrCommonJsModule(location))
-                            break;
-                        isInExternalModule = true;
-                    case 225:
-                        var moduleExports = getSymbolOfNode(location).exports;
-                        if (location.kind === 256 || ts.isAmbientModule(location)) {
-                            if (result = moduleExports["default"]) {
-                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
-                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
-                                    break loop;
-                                }
-                                result = undefined;
-                            }
-                            if (ts.hasProperty(moduleExports, name) &&
-                                moduleExports[name].flags === 8388608 &&
-                                ts.getDeclarationOfKind(moduleExports[name], 238)) {
-                                break;
-                            }
-                        }
-                        if (result = getSymbol(moduleExports, name, meaning & 8914931)) {
-                            break loop;
-                        }
-                        break;
-                    case 224:
-                        if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & 8)) {
-                            break loop;
-                        }
-                        break;
-                    case 145:
-                    case 144:
-                        if (ts.isClassLike(location.parent) && !(location.flags & 32)) {
-                            var ctor = findConstructorDeclaration(location.parent);
-                            if (ctor && ctor.locals) {
-                                if (getSymbol(ctor.locals, name, meaning & 107455)) {
-                                    propertyWithInvalidInitializer = location;
-                                }
-                            }
-                        }
-                        break;
-                    case 221:
-                    case 192:
-                    case 222:
-                        if (result = getSymbol(getSymbolOfNode(location).members, name, meaning & 793056)) {
-                            if (lastLocation && lastLocation.flags & 32) {
-                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
-                                return undefined;
-                            }
-                            break loop;
-                        }
-                        if (location.kind === 192 && meaning & 32) {
-                            var className = location.name;
-                            if (className && name === className.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    case 140:
-                        grandparent = location.parent.parent;
-                        if (ts.isClassLike(grandparent) || grandparent.kind === 222) {
-                            if (result = getSymbol(getSymbolOfNode(grandparent).members, name, meaning & 793056)) {
-                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
-                                return undefined;
-                            }
-                        }
-                        break;
-                    case 147:
-                    case 146:
-                    case 148:
-                    case 149:
-                    case 150:
-                    case 220:
-                    case 180:
-                        if (meaning & 3 && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        break;
-                    case 179:
-                        if (meaning & 3 && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        if (meaning & 16) {
-                            var functionName = location.name;
-                            if (functionName && name === functionName.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    case 143:
-                        if (location.parent && location.parent.kind === 142) {
-                            location = location.parent;
-                        }
-                        if (location.parent && ts.isClassElement(location.parent)) {
-                            location = location.parent;
-                        }
-                        break;
-                }
-                lastLocation = location;
-                location = location.parent;
-            }
-            if (!result) {
-                result = getSymbol(globals, name, meaning);
-            }
-            if (!result) {
-                if (nameNotFoundMessage) {
-                    if (!checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg)) {
-                        error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    }
-                }
-                return undefined;
-            }
-            if (nameNotFoundMessage) {
-                if (propertyWithInvalidInitializer) {
-                    var propertyName = propertyWithInvalidInitializer.name;
-                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    return undefined;
-                }
-                if (meaning & 2) {
-                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
-                    if (exportOrLocalSymbol.flags & 2) {
-                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
-                    }
-                }
-                if (result && isInExternalModule) {
-                    var decls = result.declarations;
-                    if (decls && decls.length === 1 && decls[0].kind === 228) {
-                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
-                    }
-                }
-            }
-            return result;
-        }
-        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
-            if (!errorLocation || (errorLocation.kind === 69 && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
-                return false;
-            }
-            var container = ts.getThisContainer(errorLocation, true);
-            var location = container;
-            while (location) {
-                if (ts.isClassLike(location.parent)) {
-                    var classSymbol = getSymbolOfNode(location.parent);
-                    if (!classSymbol) {
-                        break;
-                    }
-                    var constructorType = getTypeOfSymbol(classSymbol);
-                    if (getPropertyOfType(constructorType, name)) {
-                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
-                        return true;
-                    }
-                    if (location === container && !(location.flags & 32)) {
-                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
-                        if (getPropertyOfType(instanceType, name)) {
-                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                            return true;
-                        }
-                    }
-                }
-                location = location.parent;
-            }
-            return false;
-        }
-        function checkResolvedBlockScopedVariable(result, errorLocation) {
-            ts.Debug.assert((result.flags & 2) !== 0);
-            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) ? d : undefined; });
-            ts.Debug.assert(declaration !== undefined, "Block-scoped variable declaration is undefined");
-            if (!isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 218), errorLocation)) {
-                error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
-            }
-        }
-        function isSameScopeDescendentOf(initial, parent, stopAt) {
-            if (!parent) {
-                return false;
-            }
-            for (var current = initial; current && current !== stopAt && !ts.isFunctionLike(current); current = current.parent) {
-                if (current === parent) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function getAnyImportSyntax(node) {
-            if (ts.isAliasSymbolDeclaration(node)) {
-                if (node.kind === 229) {
-                    return node;
-                }
-                while (node && node.kind !== 230) {
-                    node = node.parent;
-                }
-                return node;
-            }
-        }
-        function getDeclarationOfAliasSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isAliasSymbolDeclaration(d) ? d : undefined; });
-        }
-        function getTargetOfImportEqualsDeclaration(node) {
-            if (node.moduleReference.kind === 240) {
-                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
-            }
-            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, node);
-        }
-        function getTargetOfImportClause(node) {
-            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
-            if (moduleSymbol) {
-                var exportDefaultSymbol = moduleSymbol.exports["export="] ?
-                    getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
-                    resolveSymbol(moduleSymbol.exports["default"]);
-                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
-                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
-                }
-                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
-                    return resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
-                }
-                return exportDefaultSymbol;
-            }
-        }
-        function getTargetOfNamespaceImport(node) {
-            var moduleSpecifier = node.parent.parent.moduleSpecifier;
-            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier);
-        }
-        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
-            if (valueSymbol.flags & (793056 | 1536)) {
-                return valueSymbol;
-            }
-            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
-            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
-            result.parent = valueSymbol.parent || typeSymbol.parent;
-            if (valueSymbol.valueDeclaration)
-                result.valueDeclaration = valueSymbol.valueDeclaration;
-            if (typeSymbol.members)
-                result.members = typeSymbol.members;
-            if (valueSymbol.exports)
-                result.exports = valueSymbol.exports;
-            return result;
-        }
-        function getExportOfModule(symbol, name) {
-            if (symbol.flags & 1536) {
-                var exports = getExportsOfSymbol(symbol);
-                if (ts.hasProperty(exports, name)) {
-                    return resolveSymbol(exports[name]);
-                }
-            }
-        }
-        function getPropertyOfVariable(symbol, name) {
-            if (symbol.flags & 3) {
-                var typeAnnotation = symbol.valueDeclaration.type;
-                if (typeAnnotation) {
-                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
-                }
-            }
-        }
-        function getExternalModuleMember(node, specifier) {
-            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier);
-            if (targetSymbol) {
-                var name_9 = specifier.propertyName || specifier.name;
-                if (name_9.text) {
-                    var symbolFromVariable = void 0;
-                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
-                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_9.text);
-                    }
-                    else {
-                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_9.text);
-                    }
-                    symbolFromVariable = resolveSymbol(symbolFromVariable);
-                    var symbolFromModule = getExportOfModule(targetSymbol, name_9.text);
-                    var symbol = symbolFromModule && symbolFromVariable ?
-                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
-                        symbolFromModule || symbolFromVariable;
-                    if (!symbol) {
-                        error(name_9, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_9));
-                    }
-                    return symbol;
-                }
-            }
-        }
-        function getTargetOfImportSpecifier(node) {
-            return getExternalModuleMember(node.parent.parent.parent, node);
-        }
-        function getTargetOfGlobalModuleExportDeclaration(node) {
-            return resolveExternalModuleSymbol(node.parent.symbol);
-        }
-        function getTargetOfExportSpecifier(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 | 793056 | 1536);
-        }
-        function getTargetOfExportAssignment(node) {
-            return resolveEntityName(node.expression, 107455 | 793056 | 1536);
-        }
-        function getTargetOfAliasDeclaration(node) {
-            switch (node.kind) {
-                case 229:
-                    return getTargetOfImportEqualsDeclaration(node);
-                case 231:
-                    return getTargetOfImportClause(node);
-                case 232:
-                    return getTargetOfNamespaceImport(node);
-                case 234:
-                    return getTargetOfImportSpecifier(node);
-                case 238:
-                    return getTargetOfExportSpecifier(node);
-                case 235:
-                    return getTargetOfExportAssignment(node);
-                case 228:
-                    return getTargetOfGlobalModuleExportDeclaration(node);
-            }
-        }
-        function resolveSymbol(symbol) {
-            return symbol && symbol.flags & 8388608 && !(symbol.flags & (107455 | 793056 | 1536)) ? resolveAlias(symbol) : symbol;
-        }
-        function resolveAlias(symbol) {
-            ts.Debug.assert((symbol.flags & 8388608) !== 0, "Should only get Alias here.");
-            var links = getSymbolLinks(symbol);
-            if (!links.target) {
-                links.target = resolvingSymbol;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                var target = getTargetOfAliasDeclaration(node);
-                if (links.target === resolvingSymbol) {
-                    links.target = target || unknownSymbol;
-                }
-                else {
-                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
-                }
-            }
-            else if (links.target === resolvingSymbol) {
-                links.target = unknownSymbol;
-            }
-            return links.target;
-        }
-        function markExportAsReferenced(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target) {
-                var markAlias = target === unknownSymbol ||
-                    ((target.flags & 107455) && !isConstEnumOrConstEnumOnlyModule(target));
-                if (markAlias) {
-                    markAliasSymbolAsReferenced(symbol);
-                }
-            }
-        }
-        function markAliasSymbolAsReferenced(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.referenced) {
-                links.referenced = true;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                if (node.kind === 235) {
-                    checkExpressionCached(node.expression);
-                }
-                else if (node.kind === 238) {
-                    checkExpressionCached(node.propertyName || node.name);
-                }
-                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    checkExpressionCached(node.moduleReference);
-                }
-            }
-        }
-        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importDeclaration) {
-            if (!importDeclaration) {
-                importDeclaration = ts.getAncestor(entityName, 229);
-                ts.Debug.assert(importDeclaration !== undefined);
-            }
-            if (entityName.kind === 69 && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
-            }
-            if (entityName.kind === 69 || entityName.parent.kind === 139) {
-                return resolveEntityName(entityName, 1536);
-            }
-            else {
-                ts.Debug.assert(entityName.parent.kind === 229);
-                return resolveEntityName(entityName, 107455 | 793056 | 1536);
-            }
-        }
-        function getFullyQualifiedName(symbol) {
-            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
-        }
-        function resolveEntityName(name, meaning, ignoreErrors) {
-            if (ts.nodeIsMissing(name)) {
-                return undefined;
-            }
-            var symbol;
-            if (name.kind === 69) {
-                var message = meaning === 1536 ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
-                symbol = resolveName(name, name.text, meaning, ignoreErrors ? undefined : message, name);
-                if (!symbol) {
-                    return undefined;
-                }
-            }
-            else if (name.kind === 139 || name.kind === 172) {
-                var left = name.kind === 139 ? name.left : name.expression;
-                var right = name.kind === 139 ? name.right : name.name;
-                var namespace = resolveEntityName(left, 1536, ignoreErrors);
-                if (!namespace || namespace === unknownSymbol || ts.nodeIsMissing(right)) {
-                    return undefined;
-                }
-                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
-                if (!symbol) {
-                    if (!ignoreErrors) {
-                        error(right, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
-                    }
-                    return undefined;
-                }
-            }
-            else {
-                ts.Debug.fail("Unknown entity name kind.");
-            }
-            ts.Debug.assert((symbol.flags & 16777216) === 0, "Should never get an instantiated symbol here.");
-            return symbol.flags & meaning ? symbol : resolveAlias(symbol);
-        }
-        function resolveExternalModuleName(location, moduleReferenceExpression) {
-            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
-        }
-        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError) {
-            if (moduleReferenceExpression.kind !== 9) {
-                return;
-            }
-            var moduleReferenceLiteral = moduleReferenceExpression;
-            var moduleName = ts.escapeIdentifier(moduleReferenceLiteral.text);
-            if (moduleName === undefined) {
-                return;
-            }
-            var isRelative = ts.isExternalModuleNameRelative(moduleName);
-            if (!isRelative) {
-                var symbol = getSymbol(globals, '"' + moduleName + '"', 512);
-                if (symbol) {
-                    return getMergedSymbol(symbol);
-                }
-            }
-            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReferenceLiteral.text);
-            var sourceFile = resolvedModule && host.getSourceFile(resolvedModule.resolvedFileName);
-            if (sourceFile) {
-                if (sourceFile.symbol) {
-                    return getMergedSymbol(sourceFile.symbol);
-                }
-                if (moduleNotFoundError) {
-                    error(moduleReferenceLiteral, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
-                }
-                return undefined;
-            }
-            if (moduleNotFoundError) {
-                error(moduleReferenceLiteral, moduleNotFoundError, moduleName);
-            }
-            return undefined;
-        }
-        function resolveExternalModuleSymbol(moduleSymbol) {
-            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports["export="])) || moduleSymbol;
-        }
-        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression) {
-            var symbol = resolveExternalModuleSymbol(moduleSymbol);
-            if (symbol && !(symbol.flags & (1536 | 3))) {
-                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
-                symbol = undefined;
-            }
-            return symbol;
-        }
-        function hasExportAssignmentSymbol(moduleSymbol) {
-            return moduleSymbol.exports["export="] !== undefined;
-        }
-        function getExportsOfModuleAsArray(moduleSymbol) {
-            return symbolsToArray(getExportsOfModule(moduleSymbol));
-        }
-        function getExportsOfSymbol(symbol) {
-            return symbol.flags & 1536 ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
-        }
-        function getExportsOfModule(moduleSymbol) {
-            var links = getSymbolLinks(moduleSymbol);
-            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
-        }
-        function extendExportSymbols(target, source, lookupTable, exportNode) {
-            for (var id in source) {
-                if (id !== "default" && !ts.hasProperty(target, id)) {
-                    target[id] = source[id];
-                    if (lookupTable && exportNode) {
-                        lookupTable[id] = {
-                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
-                        };
-                    }
-                }
-                else if (lookupTable && exportNode && id !== "default" && ts.hasProperty(target, id) && resolveSymbol(target[id]) !== resolveSymbol(source[id])) {
-                    if (!lookupTable[id].exportsWithDuplicate) {
-                        lookupTable[id].exportsWithDuplicate = [exportNode];
-                    }
-                    else {
-                        lookupTable[id].exportsWithDuplicate.push(exportNode);
-                    }
-                }
-            }
-        }
-        function getExportsForModule(moduleSymbol) {
-            var visitedSymbols = [];
-            return visit(moduleSymbol) || moduleSymbol.exports;
-            function visit(symbol) {
-                if (!(symbol && symbol.flags & 1952 && !ts.contains(visitedSymbols, symbol))) {
-                    return;
-                }
-                visitedSymbols.push(symbol);
-                var symbols = cloneSymbolTable(symbol.exports);
-                var exportStars = symbol.exports["__export"];
-                if (exportStars) {
-                    var nestedSymbols = {};
-                    var lookupTable = {};
-                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
-                        var node = _a[_i];
-                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
-                        var exportedSymbols = visit(resolvedModule);
-                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable, node);
-                    }
-                    for (var id in lookupTable) {
-                        var exportsWithDuplicate = lookupTable[id].exportsWithDuplicate;
-                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || ts.hasProperty(symbols, id)) {
-                            continue;
-                        }
-                        for (var _b = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _b < exportsWithDuplicate_1.length; _b++) {
-                            var node = exportsWithDuplicate_1[_b];
-                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable[id].specifierText, id));
-                        }
-                    }
-                    extendExportSymbols(symbols, nestedSymbols);
-                }
-                return symbols;
-            }
-        }
-        function getMergedSymbol(symbol) {
-            var merged;
-            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
-        }
-        function getSymbolOfNode(node) {
-            return getMergedSymbol(node.symbol);
-        }
-        function getParentOfSymbol(symbol) {
-            return getMergedSymbol(symbol.parent);
-        }
-        function getExportSymbolOfValueSymbolIfExported(symbol) {
-            return symbol && (symbol.flags & 1048576) !== 0
-                ? getMergedSymbol(symbol.exportSymbol)
-                : symbol;
-        }
-        function symbolIsValue(symbol) {
-            if (symbol.flags & 16777216) {
-                return symbolIsValue(getSymbolLinks(symbol).target);
-            }
-            if (symbol.flags & 107455) {
-                return true;
-            }
-            if (symbol.flags & 8388608) {
-                return (resolveAlias(symbol).flags & 107455) !== 0;
-            }
-            return false;
-        }
-        function findConstructorDeclaration(node) {
-            var members = node.members;
-            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
-                var member = members_1[_i];
-                if (member.kind === 148 && ts.nodeIsPresent(member.body)) {
-                    return member;
-                }
-            }
-        }
-        function createType(flags) {
-            var result = new Type(checker, flags);
-            result.id = typeCount;
-            typeCount++;
-            return result;
-        }
-        function createIntrinsicType(kind, intrinsicName) {
-            var type = createType(kind);
-            type.intrinsicName = intrinsicName;
-            return type;
-        }
-        function createObjectType(kind, symbol) {
-            var type = createType(kind);
-            type.symbol = symbol;
-            return type;
-        }
-        function isReservedMemberName(name) {
-            return name.charCodeAt(0) === 95 &&
-                name.charCodeAt(1) === 95 &&
-                name.charCodeAt(2) !== 95 &&
-                name.charCodeAt(2) !== 64;
-        }
-        function getNamedMembers(members) {
-            var result;
-            for (var id in members) {
-                if (ts.hasProperty(members, id)) {
-                    if (!isReservedMemberName(id)) {
-                        if (!result)
-                            result = [];
-                        var symbol = members[id];
-                        if (symbolIsValue(symbol)) {
-                            result.push(symbol);
-                        }
-                    }
-                }
-            }
-            return result || emptyArray;
-        }
-        function setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            type.members = members;
-            type.properties = getNamedMembers(members);
-            type.callSignatures = callSignatures;
-            type.constructSignatures = constructSignatures;
-            if (stringIndexInfo)
-                type.stringIndexInfo = stringIndexInfo;
-            if (numberIndexInfo)
-                type.numberIndexInfo = numberIndexInfo;
-            return type;
-        }
-        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            return setObjectTypeMembers(createObjectType(65536, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
-            var result;
-            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
-                if (location_1.locals && !isGlobalSourceFile(location_1)) {
-                    if (result = callback(location_1.locals)) {
-                        return result;
-                    }
-                }
-                switch (location_1.kind) {
-                    case 256:
-                        if (!ts.isExternalOrCommonJsModule(location_1)) {
-                            break;
-                        }
-                    case 225:
-                        if (result = callback(getSymbolOfNode(location_1).exports)) {
-                            return result;
-                        }
-                        break;
-                }
-            }
-            return callback(globals);
-        }
-        function getQualifiedLeftMeaning(rightMeaning) {
-            return rightMeaning === 107455 ? 107455 : 1536;
-        }
-        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
-            function getAccessibleSymbolChainFromSymbolTable(symbols) {
-                function canQualifySymbol(symbolFromSymbolTable, meaning) {
-                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
-                        return true;
-                    }
-                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
-                    return !!accessibleParent;
-                }
-                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
-                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
-                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
-                            canQualifySymbol(symbolFromSymbolTable, meaning);
-                    }
-                }
-                if (isAccessible(ts.lookUp(symbols, symbol.name))) {
-                    return [symbol];
-                }
-                return ts.forEachValue(symbols, function (symbolFromSymbolTable) {
-                    if (symbolFromSymbolTable.flags & 8388608
-                        && symbolFromSymbolTable.name !== "export="
-                        && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238)) {
-                        if (!useOnlyExternalAliasing ||
-                            ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
-                            var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
-                            if (isAccessible(symbolFromSymbolTable, resolveAlias(symbolFromSymbolTable))) {
-                                return [symbolFromSymbolTable];
-                            }
-                            var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTable(resolvedImportedSymbol.exports) : undefined;
-                            if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
-                                return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
-                            }
-                        }
-                    }
-                });
-            }
-            if (symbol) {
-                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
-                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
-                }
-            }
-        }
-        function needsQualification(symbol, enclosingDeclaration, meaning) {
-            var qualify = false;
-            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
-                if (!ts.hasProperty(symbolTable, symbol.name)) {
-                    return false;
-                }
-                var symbolFromSymbolTable = symbolTable[symbol.name];
-                if (symbolFromSymbolTable === symbol) {
-                    return true;
-                }
-                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
-                if (symbolFromSymbolTable.flags & meaning) {
-                    qualify = true;
-                    return true;
-                }
-                return false;
-            });
-            return qualify;
-        }
-        function isPropertyOrMethodDeclarationSymbol(symbol) {
-            if (symbol.declarations && symbol.declarations.length) {
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var declaration = _a[_i];
-                    switch (declaration.kind) {
-                        case 145:
-                        case 147:
-                        case 149:
-                        case 150:
-                            continue;
-                        default:
-                            return false;
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function isSymbolAccessible(symbol, enclosingDeclaration, meaning) {
-            if (symbol && enclosingDeclaration && !(symbol.flags & 262144)) {
-                var initialSymbol = symbol;
-                var meaningToLook = meaning;
-                while (symbol) {
-                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, false);
-                    if (accessibleSymbolChain) {
-                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0]);
-                        if (!hasAccessibleDeclarations) {
-                            return {
-                                accessibility: 1,
-                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1536) : undefined
-                            };
-                        }
-                        return hasAccessibleDeclarations;
-                    }
-                    meaningToLook = getQualifiedLeftMeaning(meaning);
-                    symbol = getParentOfSymbol(symbol);
-                }
-                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
-                if (symbolExternalModule) {
-                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
-                    if (symbolExternalModule !== enclosingExternalModule) {
-                        return {
-                            accessibility: 2,
-                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                            errorModuleName: symbolToString(symbolExternalModule)
-                        };
-                    }
-                }
-                return {
-                    accessibility: 1,
-                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning)
-                };
-            }
-            return { accessibility: 0 };
-            function getExternalModuleContainer(declaration) {
-                for (; declaration; declaration = declaration.parent) {
-                    if (hasExternalModuleSymbol(declaration)) {
-                        return getSymbolOfNode(declaration);
-                    }
-                }
-            }
-        }
-        function hasExternalModuleSymbol(declaration) {
-            return ts.isAmbientModule(declaration) || (declaration.kind === 256 && ts.isExternalOrCommonJsModule(declaration));
-        }
-        function hasVisibleDeclarations(symbol) {
-            var aliasesToMakeVisible;
-            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
-                return undefined;
-            }
-            return { accessibility: 0, aliasesToMakeVisible: aliasesToMakeVisible };
-            function getIsDeclarationVisible(declaration) {
-                if (!isDeclarationVisible(declaration)) {
-                    var anyImportSyntax = getAnyImportSyntax(declaration);
-                    if (anyImportSyntax &&
-                        !(anyImportSyntax.flags & 1) &&
-                        isDeclarationVisible(anyImportSyntax.parent)) {
-                        getNodeLinks(declaration).isVisible = true;
-                        if (aliasesToMakeVisible) {
-                            if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
-                                aliasesToMakeVisible.push(anyImportSyntax);
-                            }
-                        }
-                        else {
-                            aliasesToMakeVisible = [anyImportSyntax];
-                        }
-                        return true;
-                    }
-                    return false;
-                }
-                return true;
-            }
-        }
-        function isEntityNameVisible(entityName, enclosingDeclaration) {
-            var meaning;
-            if (entityName.parent.kind === 158 || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                meaning = 107455 | 1048576;
-            }
-            else if (entityName.kind === 139 || entityName.kind === 172 ||
-                entityName.parent.kind === 229) {
-                meaning = 1536;
-            }
-            else {
-                meaning = 793056;
-            }
-            var firstIdentifier = getFirstIdentifier(entityName);
-            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, undefined, undefined);
-            return (symbol && hasVisibleDeclarations(symbol)) || {
-                accessibility: 1,
-                errorSymbolName: ts.getTextOfNode(firstIdentifier),
-                errorNode: firstIdentifier
-            };
-        }
-        function writeKeyword(writer, kind) {
-            writer.writeKeyword(ts.tokenToString(kind));
-        }
-        function writePunctuation(writer, kind) {
-            writer.writePunctuation(ts.tokenToString(kind));
-        }
-        function writeSpace(writer) {
-            writer.writeSpace(" ");
-        }
-        function symbolToString(symbol, enclosingDeclaration, meaning) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function signatureToString(signature, enclosingDeclaration, flags, kind) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function typeToString(type, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            var maxLength = compilerOptions.noErrorTruncation || flags & 4 ? undefined : 100;
-            if (maxLength && result.length >= maxLength) {
-                result = result.substr(0, maxLength - "...".length) + "...";
-            }
-            return result;
-        }
-        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function visibilityToString(flags) {
-            if (flags === 8) {
-                return "private";
-            }
-            if (flags === 16) {
-                return "protected";
-            }
-            return "public";
-        }
-        function getTypeAliasForTypeLiteral(type) {
-            if (type.symbol && type.symbol.flags & 2048) {
-                var node = type.symbol.declarations[0].parent;
-                while (node.kind === 164) {
-                    node = node.parent;
-                }
-                if (node.kind === 223) {
-                    return getSymbolOfNode(node);
-                }
-            }
-            return undefined;
-        }
-        function isTopLevelInExternalModuleAugmentation(node) {
-            return node && node.parent &&
-                node.parent.kind === 226 &&
-                ts.isExternalModuleAugmentation(node.parent.parent);
-        }
-        function getSymbolDisplayBuilder() {
-            function getNameOfSymbol(symbol) {
-                if (symbol.declarations && symbol.declarations.length) {
-                    var declaration = symbol.declarations[0];
-                    if (declaration.name) {
-                        return ts.declarationNameToString(declaration.name);
-                    }
-                    switch (declaration.kind) {
-                        case 192:
-                            return "(Anonymous class)";
-                        case 179:
-                        case 180:
-                            return "(Anonymous function)";
-                    }
-                }
-                return symbol.name;
-            }
-            function appendSymbolNameOnly(symbol, writer) {
-                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
-            }
-            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
-                var symbolName = getNameOfSymbol(symbol);
-                var firstChar = symbolName.charCodeAt(0);
-                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
-                if (needsElementAccess) {
-                    writePunctuation(writer, 19);
-                    if (ts.isSingleOrDoubleQuote(firstChar)) {
-                        writer.writeStringLiteral(symbolName);
-                    }
-                    else {
-                        writer.writeSymbol(symbolName, symbol);
-                    }
-                    writePunctuation(writer, 20);
-                }
-                else {
-                    writePunctuation(writer, 21);
-                    writer.writeSymbol(symbolName, symbol);
-                }
-            }
-            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
-                var parentSymbol;
-                function appendParentTypeArgumentsAndSymbolName(symbol) {
-                    if (parentSymbol) {
-                        if (flags & 1) {
-                            if (symbol.flags & 16777216) {
-                                buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration);
-                            }
-                            else {
-                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
-                            }
-                        }
-                        appendPropertyOrElementAccessForSymbol(symbol, writer);
-                    }
-                    else {
-                        appendSymbolNameOnly(symbol, writer);
-                    }
-                    parentSymbol = symbol;
-                }
-                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
-                function walkSymbol(symbol, meaning) {
-                    if (symbol) {
-                        var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2));
-                        if (!accessibleSymbolChain ||
-                            needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
-                            walkSymbol(getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol), getQualifiedLeftMeaning(meaning));
-                        }
-                        if (accessibleSymbolChain) {
-                            for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
-                                var accessibleSymbol = accessibleSymbolChain_1[_i];
-                                appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
-                            }
-                        }
-                        else {
-                            if (!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) {
-                                return;
-                            }
-                            if (symbol.flags & 2048 || symbol.flags & 4096) {
-                                return;
-                            }
-                            appendParentTypeArgumentsAndSymbolName(symbol);
-                        }
-                    }
-                }
-                var isTypeParameter = symbol.flags & 262144;
-                var typeFormatFlag = 128 & typeFlags;
-                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
-                    walkSymbol(symbol, meaning);
-                    return;
-                }
-                return appendParentTypeArgumentsAndSymbolName(symbol);
-            }
-            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
-                var globalFlagsToPass = globalFlags & 16;
-                var inObjectTypeLiteral = false;
-                return writeType(type, globalFlags);
-                function writeType(type, flags) {
-                    if (type.flags & 150995071) {
-                        writer.writeKeyword(!(globalFlags & 16) && isTypeAny(type)
-                            ? "any"
-                            : type.intrinsicName);
-                    }
-                    else if (type.flags & 33554432) {
-                        if (inObjectTypeLiteral) {
-                            writer.reportInaccessibleThisError();
-                        }
-                        writer.writeKeyword("this");
-                    }
-                    else if (type.flags & 4096) {
-                        writeTypeReference(type, flags);
-                    }
-                    else if (type.flags & (1024 | 2048 | 128 | 512)) {
-                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793056, 0, flags);
-                    }
-                    else if (type.flags & 8192) {
-                        writeTupleType(type);
-                    }
-                    else if (type.flags & 49152) {
-                        writeUnionOrIntersectionType(type, flags);
-                    }
-                    else if (type.flags & 65536) {
-                        writeAnonymousType(type, flags);
-                    }
-                    else if (type.flags & 256) {
-                        writer.writeStringLiteral("\"" + ts.escapeString(type.text) + "\"");
-                    }
-                    else {
-                        writePunctuation(writer, 15);
-                        writeSpace(writer);
-                        writePunctuation(writer, 22);
-                        writeSpace(writer);
-                        writePunctuation(writer, 16);
-                    }
-                }
-                function writeTypeList(types, delimiter) {
-                    for (var i = 0; i < types.length; i++) {
-                        if (i > 0) {
-                            if (delimiter !== 24) {
-                                writeSpace(writer);
-                            }
-                            writePunctuation(writer, delimiter);
-                            writeSpace(writer);
-                        }
-                        writeType(types[i], delimiter === 24 ? 0 : 64);
-                    }
-                }
-                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
-                    if (symbol.flags & 32 || !isReservedMemberName(symbol.name)) {
-                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793056, 0, flags);
-                    }
-                    if (pos < end) {
-                        writePunctuation(writer, 25);
-                        writeType(typeArguments[pos], 256);
-                        pos++;
-                        while (pos < end) {
-                            writePunctuation(writer, 24);
-                            writeSpace(writer);
-                            writeType(typeArguments[pos], 0);
-                            pos++;
-                        }
-                        writePunctuation(writer, 27);
-                    }
-                }
-                function writeTypeReference(type, flags) {
-                    var typeArguments = type.typeArguments || emptyArray;
-                    if (type.target === globalArrayType && !(flags & 1)) {
-                        writeType(typeArguments[0], 64);
-                        writePunctuation(writer, 19);
-                        writePunctuation(writer, 20);
-                    }
-                    else {
-                        var outerTypeParameters = type.target.outerTypeParameters;
-                        var i = 0;
-                        if (outerTypeParameters) {
-                            var length_1 = outerTypeParameters.length;
-                            while (i < length_1) {
-                                var start = i;
-                                var parent_6 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
-                                do {
-                                    i++;
-                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_6);
-                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
-                                    writeSymbolTypeReference(parent_6, typeArguments, start, i, flags);
-                                    writePunctuation(writer, 21);
-                                }
-                            }
-                        }
-                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
-                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
-                    }
-                }
-                function writeTupleType(type) {
-                    writePunctuation(writer, 19);
-                    writeTypeList(type.elementTypes, 24);
-                    writePunctuation(writer, 20);
-                }
-                function writeUnionOrIntersectionType(type, flags) {
-                    if (flags & 64) {
-                        writePunctuation(writer, 17);
-                    }
-                    writeTypeList(type.types, type.flags & 16384 ? 47 : 46);
-                    if (flags & 64) {
-                        writePunctuation(writer, 18);
-                    }
-                }
-                function writeAnonymousType(type, flags) {
-                    var symbol = type.symbol;
-                    if (symbol) {
-                        if (symbol.flags & (32 | 384 | 512)) {
-                            writeTypeOfSymbol(type, flags);
-                        }
-                        else if (shouldWriteTypeOfFunctionSymbol()) {
-                            writeTypeOfSymbol(type, flags);
-                        }
-                        else if (ts.contains(symbolStack, symbol)) {
-                            var typeAlias = getTypeAliasForTypeLiteral(type);
-                            if (typeAlias) {
-                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793056, 0, flags);
-                            }
-                            else {
-                                writeKeyword(writer, 117);
-                            }
-                        }
-                        else {
-                            if (!symbolStack) {
-                                symbolStack = [];
-                            }
-                            symbolStack.push(symbol);
-                            writeLiteralType(type, flags);
-                            symbolStack.pop();
-                        }
-                    }
-                    else {
-                        writeLiteralType(type, flags);
-                    }
-                    function shouldWriteTypeOfFunctionSymbol() {
-                        var isStaticMethodSymbol = !!(symbol.flags & 8192 &&
-                            ts.forEach(symbol.declarations, function (declaration) { return declaration.flags & 32; }));
-                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16) &&
-                            (symbol.parent ||
-                                ts.forEach(symbol.declarations, function (declaration) {
-                                    return declaration.parent.kind === 256 || declaration.parent.kind === 226;
-                                }));
-                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
-                            return !!(flags & 2) ||
-                                (ts.contains(symbolStack, symbol));
-                        }
-                    }
-                }
-                function writeTypeOfSymbol(type, typeFormatFlags) {
-                    writeKeyword(writer, 101);
-                    writeSpace(writer);
-                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455, 0, typeFormatFlags);
-                }
-                function writeIndexSignature(info, keyword) {
-                    if (info) {
-                        if (info.isReadonly) {
-                            writeKeyword(writer, 128);
-                            writeSpace(writer);
-                        }
-                        writePunctuation(writer, 19);
-                        writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
-                        writePunctuation(writer, 54);
-                        writeSpace(writer);
-                        writeKeyword(writer, keyword);
-                        writePunctuation(writer, 20);
-                        writePunctuation(writer, 54);
-                        writeSpace(writer);
-                        writeType(info.type, 0);
-                        writePunctuation(writer, 23);
-                        writer.writeLine();
-                    }
-                }
-                function writePropertyWithModifiers(prop) {
-                    if (isReadonlySymbol(prop)) {
-                        writeKeyword(writer, 128);
-                        writeSpace(writer);
-                    }
-                    buildSymbolDisplay(prop, writer);
-                    if (prop.flags & 536870912) {
-                        writePunctuation(writer, 53);
-                    }
-                }
-                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
-                    if (flags & 64) {
-                        return true;
-                    }
-                    else if (flags & 256) {
-                        var typeParameters = callSignature.target && (flags & 32) ?
-                            callSignature.target.typeParameters : callSignature.typeParameters;
-                        return typeParameters && typeParameters.length !== 0;
-                    }
-                    return false;
-                }
-                function writeLiteralType(type, flags) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
-                            writePunctuation(writer, 15);
-                            writePunctuation(writer, 16);
-                            return;
-                        }
-                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
-                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 17);
-                            }
-                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8, undefined, symbolStack);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 18);
-                            }
-                            return;
-                        }
-                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
-                            if (flags & 64) {
-                                writePunctuation(writer, 17);
-                            }
-                            writeKeyword(writer, 92);
-                            writeSpace(writer);
-                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8, undefined, symbolStack);
-                            if (flags & 64) {
-                                writePunctuation(writer, 18);
-                            }
-                            return;
-                        }
-                    }
-                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
-                    inObjectTypeLiteral = true;
-                    writePunctuation(writer, 15);
-                    writer.writeLine();
-                    writer.increaseIndent();
-                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
-                        var signature = _a[_i];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, undefined, symbolStack);
-                        writePunctuation(writer, 23);
-                        writer.writeLine();
-                    }
-                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
-                        var signature = _c[_b];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1, symbolStack);
-                        writePunctuation(writer, 23);
-                        writer.writeLine();
-                    }
-                    writeIndexSignature(resolved.stringIndexInfo, 132);
-                    writeIndexSignature(resolved.numberIndexInfo, 130);
-                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
-                        var p = _e[_d];
-                        var t = getTypeOfSymbol(p);
-                        if (p.flags & (16 | 8192) && !getPropertiesOfObjectType(t).length) {
-                            var signatures = getSignaturesOfType(t, 0);
-                            for (var _f = 0, signatures_1 = signatures; _f < signatures_1.length; _f++) {
-                                var signature = signatures_1[_f];
-                                writePropertyWithModifiers(p);
-                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, undefined, symbolStack);
-                                writePunctuation(writer, 23);
-                                writer.writeLine();
-                            }
-                        }
-                        else {
-                            writePropertyWithModifiers(p);
-                            writePunctuation(writer, 54);
-                            writeSpace(writer);
-                            writeType(t, 0);
-                            writePunctuation(writer, 23);
-                            writer.writeLine();
-                        }
-                    }
-                    writer.decreaseIndent();
-                    writePunctuation(writer, 16);
-                    inObjectTypeLiteral = saveInObjectTypeLiteral;
-                }
-            }
-            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
-                var targetSymbol = getTargetSymbol(symbol);
-                if (targetSymbol.flags & 32 || targetSymbol.flags & 64 || targetSymbol.flags & 524288) {
-                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
-                }
-            }
-            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
-                appendSymbolNameOnly(tp.symbol, writer);
-                var constraint = getConstraintOfTypeParameter(tp);
-                if (constraint) {
-                    writeSpace(writer);
-                    writeKeyword(writer, 83);
-                    writeSpace(writer);
-                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
-                }
-            }
-            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
-                var parameterNode = p.valueDeclaration;
-                if (ts.isRestParameter(parameterNode)) {
-                    writePunctuation(writer, 22);
-                }
-                if (ts.isBindingPattern(parameterNode.name)) {
-                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    appendSymbolNameOnly(p, writer);
-                }
-                if (isOptionalParameter(parameterNode)) {
-                    writePunctuation(writer, 53);
-                }
-                writePunctuation(writer, 54);
-                writeSpace(writer);
-                buildTypeDisplay(getTypeOfSymbol(p), writer, enclosingDeclaration, flags, symbolStack);
-            }
-            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
-                if (bindingPattern.kind === 167) {
-                    writePunctuation(writer, 15);
-                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 16);
-                }
-                else if (bindingPattern.kind === 168) {
-                    writePunctuation(writer, 19);
-                    var elements = bindingPattern.elements;
-                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    if (elements && elements.hasTrailingComma) {
-                        writePunctuation(writer, 24);
-                    }
-                    writePunctuation(writer, 20);
-                }
-            }
-            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
-                if (bindingElement.kind === 193) {
-                    return;
-                }
-                ts.Debug.assert(bindingElement.kind === 169);
-                if (bindingElement.propertyName) {
-                    writer.writeSymbol(ts.getTextOfNode(bindingElement.propertyName), bindingElement.symbol);
-                    writePunctuation(writer, 54);
-                    writeSpace(writer);
-                }
-                if (ts.isBindingPattern(bindingElement.name)) {
-                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    if (bindingElement.dotDotDotToken) {
-                        writePunctuation(writer, 22);
-                    }
-                    appendSymbolNameOnly(bindingElement.symbol, writer);
-                }
-            }
-            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25);
-                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 27);
-                }
-            }
-            function buildDisplayForCommaSeparatedList(list, writer, action) {
-                for (var i = 0; i < list.length; i++) {
-                    if (i > 0) {
-                        writePunctuation(writer, 24);
-                        writeSpace(writer);
-                    }
-                    action(list[i]);
-                }
-            }
-            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25);
-                    var flags_1 = 256;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (i > 0) {
-                            writePunctuation(writer, 24);
-                            writeSpace(writer);
-                            flags_1 = 0;
-                        }
-                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags_1);
-                    }
-                    writePunctuation(writer, 27);
-                }
-            }
-            function buildDisplayForParametersAndDelimiters(thisType, parameters, writer, enclosingDeclaration, flags, symbolStack) {
-                writePunctuation(writer, 17);
-                if (thisType) {
-                    writeKeyword(writer, 97);
-                    writePunctuation(writer, 54);
-                    writeSpace(writer);
-                    buildTypeDisplay(thisType, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                for (var i = 0; i < parameters.length; i++) {
-                    if (i > 0 || thisType) {
-                        writePunctuation(writer, 24);
-                        writeSpace(writer);
-                    }
-                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
-                }
-                writePunctuation(writer, 18);
-            }
-            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    writer.writeParameter(predicate.parameterName);
-                }
-                else {
-                    writeKeyword(writer, 97);
-                }
-                writeSpace(writer);
-                writeKeyword(writer, 124);
-                writeSpace(writer);
-                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
-            }
-            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
-                if (flags & 8) {
-                    writeSpace(writer);
-                    writePunctuation(writer, 34);
-                }
-                else {
-                    writePunctuation(writer, 54);
-                }
-                writeSpace(writer);
-                if (signature.typePredicate) {
-                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    var returnType = getReturnTypeOfSignature(signature);
-                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
-                }
-            }
-            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
-                if (kind === 1) {
-                    writeKeyword(writer, 92);
-                    writeSpace(writer);
-                }
-                if (signature.target && (flags & 32)) {
-                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
-                }
-                else {
-                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                buildDisplayForParametersAndDelimiters(signature.thisType, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
-                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
-            }
-            return _displayBuilder || (_displayBuilder = {
-                buildSymbolDisplay: buildSymbolDisplay,
-                buildTypeDisplay: buildTypeDisplay,
-                buildTypeParameterDisplay: buildTypeParameterDisplay,
-                buildTypePredicateDisplay: buildTypePredicateDisplay,
-                buildParameterDisplay: buildParameterDisplay,
-                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
-                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
-                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
-                buildSignatureDisplay: buildSignatureDisplay,
-                buildReturnTypeDisplay: buildReturnTypeDisplay
-            });
-        }
-        function isDeclarationVisible(node) {
-            if (node) {
-                var links = getNodeLinks(node);
-                if (links.isVisible === undefined) {
-                    links.isVisible = !!determineIfDeclarationIsVisible();
-                }
-                return links.isVisible;
-            }
-            return false;
-            function determineIfDeclarationIsVisible() {
-                switch (node.kind) {
-                    case 169:
-                        return isDeclarationVisible(node.parent.parent);
-                    case 218:
-                        if (ts.isBindingPattern(node.name) &&
-                            !node.name.elements.length) {
-                            return false;
-                        }
-                    case 225:
-                    case 221:
-                    case 222:
-                    case 223:
-                    case 220:
-                    case 224:
-                    case 229:
-                        if (ts.isExternalModuleAugmentation(node)) {
-                            return true;
-                        }
-                        var parent_7 = getDeclarationContainer(node);
-                        if (!(ts.getCombinedNodeFlags(node) & 1) &&
-                            !(node.kind !== 229 && parent_7.kind !== 256 && ts.isInAmbientContext(parent_7))) {
-                            return isGlobalSourceFile(parent_7);
-                        }
-                        return isDeclarationVisible(parent_7);
-                    case 145:
-                    case 144:
-                    case 149:
-                    case 150:
-                    case 147:
-                    case 146:
-                        if (node.flags & (8 | 16)) {
-                            return false;
-                        }
-                    case 148:
-                    case 152:
-                    case 151:
-                    case 153:
-                    case 142:
-                    case 226:
-                    case 156:
-                    case 157:
-                    case 159:
-                    case 155:
-                    case 160:
-                    case 161:
-                    case 162:
-                    case 163:
-                    case 164:
-                        return isDeclarationVisible(node.parent);
-                    case 231:
-                    case 232:
-                    case 234:
-                        return false;
-                    case 141:
-                    case 256:
-                        return true;
-                    case 235:
-                        return false;
-                    default:
-                        return false;
-                }
-            }
-        }
-        function collectLinkedAliases(node) {
-            var exportSymbol;
-            if (node.parent && node.parent.kind === 235) {
-                exportSymbol = resolveName(node.parent, node.text, 107455 | 793056 | 1536 | 8388608, ts.Diagnostics.Cannot_find_name_0, node);
-            }
-            else if (node.parent.kind === 238) {
-                var exportSpecifier = node.parent;
-                exportSymbol = exportSpecifier.parent.parent.moduleSpecifier ?
-                    getExternalModuleMember(exportSpecifier.parent.parent, exportSpecifier) :
-                    resolveEntityName(exportSpecifier.propertyName || exportSpecifier.name, 107455 | 793056 | 1536 | 8388608);
-            }
-            var result = [];
-            if (exportSymbol) {
-                buildVisibleNodeList(exportSymbol.declarations);
-            }
-            return result;
-            function buildVisibleNodeList(declarations) {
-                ts.forEach(declarations, function (declaration) {
-                    getNodeLinks(declaration).isVisible = true;
-                    var resultNode = getAnyImportSyntax(declaration) || declaration;
-                    if (!ts.contains(result, resultNode)) {
-                        result.push(resultNode);
-                    }
-                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
-                        var internalModuleReference = declaration.moduleReference;
-                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
-                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 | 793056 | 1536, undefined, undefined);
-                        if (importSymbol) {
-                            buildVisibleNodeList(importSymbol.declarations);
-                        }
-                    }
-                });
-            }
-        }
-        function pushTypeResolution(target, propertyName) {
-            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
-            if (resolutionCycleStartIndex >= 0) {
-                var length_2 = resolutionTargets.length;
-                for (var i = resolutionCycleStartIndex; i < length_2; i++) {
-                    resolutionResults[i] = false;
-                }
-                return false;
-            }
-            resolutionTargets.push(target);
-            resolutionResults.push(true);
-            resolutionPropertyNames.push(propertyName);
-            return true;
-        }
-        function findResolutionCycleStartIndex(target, propertyName) {
-            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
-                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
-                    return -1;
-                }
-                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
-                    return i;
-                }
-            }
-            return -1;
-        }
-        function hasType(target, propertyName) {
-            if (propertyName === 0) {
-                return getSymbolLinks(target).type;
-            }
-            if (propertyName === 2) {
-                return getSymbolLinks(target).declaredType;
-            }
-            if (propertyName === 1) {
-                ts.Debug.assert(!!(target.flags & 1024));
-                return target.resolvedBaseConstructorType;
-            }
-            if (propertyName === 3) {
-                return target.resolvedReturnType;
-            }
-            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
-        }
-        function popTypeResolution() {
-            resolutionTargets.pop();
-            resolutionPropertyNames.pop();
-            return resolutionResults.pop();
-        }
-        function getDeclarationContainer(node) {
-            node = ts.getRootDeclaration(node);
-            while (node) {
-                switch (node.kind) {
-                    case 218:
-                    case 219:
-                    case 234:
-                    case 233:
-                    case 232:
-                    case 231:
-                        node = node.parent;
-                        break;
-                    default:
-                        return node.parent;
-                }
-            }
-        }
-        function getTypeOfPrototypeProperty(prototype) {
-            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
-            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
-        }
-        function getTypeOfPropertyOfType(type, name) {
-            var prop = getPropertyOfType(type, name);
-            return prop ? getTypeOfSymbol(prop) : undefined;
-        }
-        function isTypeAny(type) {
-            return type && (type.flags & 1) !== 0;
-        }
-        function getTypeForBindingElementParent(node) {
-            var symbol = getSymbolOfNode(node);
-            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, false);
-        }
-        function getTextOfPropertyName(name) {
-            switch (name.kind) {
-                case 69:
-                    return name.text;
-                case 9:
-                case 8:
-                    return name.text;
-                case 140:
-                    if (ts.isStringOrNumericLiteral(name.expression.kind)) {
-                        return name.expression.text;
-                    }
-            }
-            return undefined;
-        }
-        function isComputedNonLiteralName(name) {
-            return name.kind === 140 && !ts.isStringOrNumericLiteral(name.expression.kind);
-        }
-        function getTypeForBindingElement(declaration) {
-            var pattern = declaration.parent;
-            var parentType = getTypeForBindingElementParent(pattern.parent);
-            if (parentType === unknownType) {
-                return unknownType;
-            }
-            if (!parentType || isTypeAny(parentType)) {
-                if (declaration.initializer) {
-                    return checkExpressionCached(declaration.initializer);
-                }
-                return parentType;
-            }
-            var type;
-            if (pattern.kind === 167) {
-                var name_10 = declaration.propertyName || declaration.name;
-                if (isComputedNonLiteralName(name_10)) {
-                    return anyType;
-                }
-                if (declaration.initializer) {
-                    getContextualType(declaration.initializer);
-                }
-                var text = getTextOfPropertyName(name_10);
-                type = getTypeOfPropertyOfType(parentType, text) ||
-                    isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1) ||
-                    getIndexTypeOfType(parentType, 0);
-                if (!type) {
-                    error(name_10, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_10));
-                    return unknownType;
-                }
-            }
-            else {
-                var elementType = checkIteratedTypeOrElementType(parentType, pattern, false);
-                if (!declaration.dotDotDotToken) {
-                    var propName = "" + ts.indexOf(pattern.elements, declaration);
-                    type = isTupleLikeType(parentType)
-                        ? getTypeOfPropertyOfType(parentType, propName)
-                        : elementType;
-                    if (!type) {
-                        if (isTupleType(parentType)) {
-                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), parentType.elementTypes.length, pattern.elements.length);
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
-                        }
-                        return unknownType;
-                    }
-                }
-                else {
-                    type = createArrayType(elementType);
-                }
-            }
-            if (strictNullChecks && declaration.initializer && !(getNullableKind(checkExpressionCached(declaration.initializer)) & 32)) {
-                type = getTypeWithFacts(type, 131072);
-            }
-            return type;
-        }
-        function getTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            var jsDocType = getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-            if (jsDocType) {
-                return getTypeFromTypeNode(jsDocType);
-            }
-        }
-        function getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            var typeTag = ts.getJSDocTypeTag(declaration);
-            if (typeTag && typeTag.typeExpression) {
-                return typeTag.typeExpression.type;
-            }
-            if (declaration.kind === 218 &&
-                declaration.parent.kind === 219 &&
-                declaration.parent.parent.kind === 200) {
-                var annotation = ts.getJSDocTypeTag(declaration.parent.parent);
-                if (annotation && annotation.typeExpression) {
-                    return annotation.typeExpression.type;
-                }
-            }
-            else if (declaration.kind === 142) {
-                var paramTag = ts.getCorrespondingJSDocParameterTag(declaration);
-                if (paramTag && paramTag.typeExpression) {
-                    return paramTag.typeExpression.type;
-                }
-            }
-            return undefined;
-        }
-        function addOptionality(type, optional) {
-            return strictNullChecks && optional ? addNullableKind(type, 32) : type;
-        }
-        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
-            if (declaration.flags & 134217728) {
-                var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            if (declaration.parent.parent.kind === 207) {
-                return stringType;
-            }
-            if (declaration.parent.parent.kind === 208) {
-                return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType;
-            }
-            if (ts.isBindingPattern(declaration.parent)) {
-                return getTypeForBindingElement(declaration);
-            }
-            if (declaration.type) {
-                return addOptionality(getTypeFromTypeNode(declaration.type), declaration.questionToken && includeOptionality);
-            }
-            if (declaration.kind === 142) {
-                var func = declaration.parent;
-                if (func.kind === 150 && !ts.hasDynamicName(func)) {
-                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149);
-                    if (getter) {
-                        var signature = getSignatureFromDeclaration(getter);
-                        var thisParameter = getAccessorThisParameter(func);
-                        if (thisParameter && declaration === thisParameter) {
-                            return signature.thisType;
-                        }
-                        return getReturnTypeOfSignature(signature);
-                    }
-                }
-                var type = declaration.symbol.name === "this"
-                    ? getContextuallyTypedThisType(func)
-                    : getContextuallyTypedParameterType(declaration);
-                if (type) {
-                    return addOptionality(type, declaration.questionToken && includeOptionality);
-                }
-            }
-            if (declaration.initializer) {
-                return addOptionality(checkExpressionCached(declaration.initializer), declaration.questionToken && includeOptionality);
-            }
-            if (declaration.kind === 254) {
-                return checkIdentifier(declaration.name);
-            }
-            if (ts.isBindingPattern(declaration.name)) {
-                return getTypeFromBindingPattern(declaration.name, false);
-            }
-            return undefined;
-        }
-        function getTypeFromBindingElement(element, includePatternInType) {
-            if (element.initializer) {
-                var type = checkExpressionCached(element.initializer);
-                reportErrorsFromWidening(element, type);
-                return getWidenedType(type);
-            }
-            if (ts.isBindingPattern(element.name)) {
-                return getTypeFromBindingPattern(element.name, includePatternInType);
-            }
-            if (compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
-                reportImplicitAnyError(element, anyType);
-            }
-            return anyType;
-        }
-        function getTypeFromObjectBindingPattern(pattern, includePatternInType) {
-            var members = {};
-            var hasComputedProperties = false;
-            ts.forEach(pattern.elements, function (e) {
-                var name = e.propertyName || e.name;
-                if (isComputedNonLiteralName(name)) {
-                    hasComputedProperties = true;
-                    return;
-                }
-                var text = getTextOfPropertyName(name);
-                var flags = 4 | 67108864 | (e.initializer ? 536870912 : 0);
-                var symbol = createSymbol(flags, text);
-                symbol.type = getTypeFromBindingElement(e, includePatternInType);
-                symbol.bindingElement = e;
-                members[symbol.name] = symbol;
-            });
-            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined);
-            if (includePatternInType) {
-                result.pattern = pattern;
-            }
-            if (hasComputedProperties) {
-                result.flags |= 67108864;
-            }
-            return result;
-        }
-        function getTypeFromArrayBindingPattern(pattern, includePatternInType) {
-            var elements = pattern.elements;
-            if (elements.length === 0 || elements[elements.length - 1].dotDotDotToken) {
-                return languageVersion >= 2 ? createIterableType(anyType) : anyArrayType;
-            }
-            var elementTypes = ts.map(elements, function (e) { return e.kind === 193 ? anyType : getTypeFromBindingElement(e, includePatternInType); });
-            if (includePatternInType) {
-                var result = createNewTupleType(elementTypes);
-                result.pattern = pattern;
-                return result;
-            }
-            return createTupleType(elementTypes);
-        }
-        function getTypeFromBindingPattern(pattern, includePatternInType) {
-            return pattern.kind === 167
-                ? getTypeFromObjectBindingPattern(pattern, includePatternInType)
-                : getTypeFromArrayBindingPattern(pattern, includePatternInType);
-        }
-        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
-            var type = getTypeForVariableLikeDeclaration(declaration, true);
-            if (type) {
-                if (reportErrors) {
-                    reportErrorsFromWidening(declaration, type);
-                }
-                if (declaration.kind === 253) {
-                    return type;
-                }
-                return getWidenedType(type);
-            }
-            type = declaration.dotDotDotToken ? anyArrayType : anyType;
-            if (reportErrors && compilerOptions.noImplicitAny) {
-                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
-                    reportImplicitAnyError(declaration, type);
-                }
-            }
-            return type;
-        }
-        function declarationBelongsToPrivateAmbientMember(declaration) {
-            var root = ts.getRootDeclaration(declaration);
-            var memberDeclaration = root.kind === 142 ? root.parent : root;
-            return isPrivateWithinAmbient(memberDeclaration);
-        }
-        function getTypeOfVariableOrParameterOrProperty(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                if (symbol.flags & 134217728) {
-                    return links.type = getTypeOfPrototypeProperty(symbol);
-                }
-                var declaration = symbol.valueDeclaration;
-                if (declaration.parent.kind === 252) {
-                    return links.type = anyType;
-                }
-                if (declaration.kind === 235) {
-                    return links.type = checkExpression(declaration.expression);
-                }
-                if (declaration.kind === 187) {
-                    return links.type = getUnionType(ts.map(symbol.declarations, function (decl) { return checkExpressionCached(decl.right); }));
-                }
-                if (declaration.kind === 172) {
-                    if (declaration.parent.kind === 187) {
-                        return links.type = checkExpressionCached(declaration.parent.right);
-                    }
-                }
-                if (!pushTypeResolution(symbol, 0)) {
-                    return unknownType;
-                }
-                var type = getWidenedTypeForVariableLikeDeclaration(declaration, true);
-                if (!popTypeResolution()) {
-                    if (symbol.valueDeclaration.type) {
-                        type = unknownType;
-                        error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
-                    }
-                    else {
-                        type = anyType;
-                        if (compilerOptions.noImplicitAny) {
-                            error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
-                        }
-                    }
-                }
-                links.type = type;
-            }
-            return links.type;
-        }
-        function getAnnotatedAccessorType(accessor) {
-            if (accessor) {
-                if (accessor.kind === 149) {
-                    return accessor.type && getTypeFromTypeNode(accessor.type);
-                }
-                else {
-                    var setterTypeAnnotation = ts.getSetAccessorTypeAnnotationNode(accessor);
-                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
-                }
-            }
-            return undefined;
-        }
-        function getAnnotatedAccessorThisType(accessor) {
-            if (accessor) {
-                var parameter = getAccessorThisParameter(accessor);
-                if (parameter && parameter.type) {
-                    return getTypeFromTypeNode(accessor.parameters[0].type);
-                }
-            }
-            return undefined;
-        }
-        function getTypeOfAccessors(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var getter = ts.getDeclarationOfKind(symbol, 149);
-                var setter = ts.getDeclarationOfKind(symbol, 150);
-                if (getter && getter.flags & 134217728) {
-                    var jsDocType = getTypeForVariableLikeDeclarationFromJSDocComment(getter);
-                    if (jsDocType) {
-                        return links.type = jsDocType;
-                    }
-                }
-                if (!pushTypeResolution(symbol, 0)) {
-                    return unknownType;
-                }
-                var type = void 0;
-                var getterReturnType = getAnnotatedAccessorType(getter);
-                if (getterReturnType) {
-                    type = getterReturnType;
-                }
-                else {
-                    var setterParameterType = getAnnotatedAccessorType(setter);
-                    if (setterParameterType) {
-                        type = setterParameterType;
-                    }
-                    else {
-                        if (getter && getter.body) {
-                            type = getReturnTypeFromBody(getter);
-                        }
-                        else {
-                            if (compilerOptions.noImplicitAny) {
-                                error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation, symbolToString(symbol));
-                            }
-                            type = anyType;
-                        }
-                    }
-                }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var getter_1 = ts.getDeclarationOfKind(symbol, 149);
-                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
-                    }
-                }
-                links.type = type;
-            }
-            return links.type;
-        }
-        function getTypeOfFuncClassEnumModule(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var type = createObjectType(65536, symbol);
-                links.type = strictNullChecks && symbol.flags & 536870912 ?
-                    addNullableKind(type, 32) : type;
-            }
-            return links.type;
-        }
-        function getTypeOfEnumMember(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
-            }
-            return links.type;
-        }
-        function getTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var targetSymbol = resolveAlias(symbol);
-                links.type = targetSymbol.flags & 107455
-                    ? getTypeOfSymbol(targetSymbol)
-                    : unknownType;
-            }
-            return links.type;
-        }
-        function getTypeOfInstantiatedSymbol(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
-            }
-            return links.type;
-        }
-        function getTypeOfSymbol(symbol) {
-            if (symbol.flags & 16777216) {
-                return getTypeOfInstantiatedSymbol(symbol);
-            }
-            if (symbol.flags & (3 | 4)) {
-                return getTypeOfVariableOrParameterOrProperty(symbol);
-            }
-            if (symbol.flags & (16 | 8192 | 32 | 384 | 512)) {
-                return getTypeOfFuncClassEnumModule(symbol);
-            }
-            if (symbol.flags & 8) {
-                return getTypeOfEnumMember(symbol);
-            }
-            if (symbol.flags & 98304) {
-                return getTypeOfAccessors(symbol);
-            }
-            if (symbol.flags & 8388608) {
-                return getTypeOfAlias(symbol);
-            }
-            return unknownType;
-        }
-        function getTargetType(type) {
-            return type.flags & 4096 ? type.target : type;
-        }
-        function hasBaseType(type, checkBase) {
-            return check(type);
-            function check(type) {
-                var target = getTargetType(type);
-                return target === checkBase || ts.forEach(getBaseTypes(target), check);
-            }
-        }
-        function appendTypeParameters(typeParameters, declarations) {
-            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
-                var declaration = declarations_2[_i];
-                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
-                if (!typeParameters) {
-                    typeParameters = [tp];
-                }
-                else if (!ts.contains(typeParameters, tp)) {
-                    typeParameters.push(tp);
-                }
-            }
-            return typeParameters;
-        }
-        function appendOuterTypeParameters(typeParameters, node) {
-            while (true) {
-                node = node.parent;
-                if (!node) {
-                    return typeParameters;
-                }
-                if (node.kind === 221 || node.kind === 192 ||
-                    node.kind === 220 || node.kind === 179 ||
-                    node.kind === 147 || node.kind === 180) {
-                    var declarations = node.typeParameters;
-                    if (declarations) {
-                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
-                    }
-                }
-            }
-        }
-        function getOuterTypeParametersOfClassOrInterface(symbol) {
-            var declaration = symbol.flags & 32 ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222);
-            return appendOuterTypeParameters(undefined, declaration);
-        }
-        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
-            var result;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var node = _a[_i];
-                if (node.kind === 222 || node.kind === 221 ||
-                    node.kind === 192 || node.kind === 223) {
-                    var declaration = node;
-                    if (declaration.typeParameters) {
-                        result = appendTypeParameters(result, declaration.typeParameters);
-                    }
-                }
-            }
-            return result;
-        }
-        function getTypeParametersOfClassOrInterface(symbol) {
-            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
-        }
-        function isConstructorType(type) {
-            return type.flags & 80896 && getSignaturesOfType(type, 1).length > 0;
-        }
-        function getBaseTypeNodeOfClass(type) {
-            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
-        }
-        function getConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var typeArgCount = typeArgumentNodes ? typeArgumentNodes.length : 0;
-            return ts.filter(getSignaturesOfType(type, 1), function (sig) { return (sig.typeParameters ? sig.typeParameters.length : 0) === typeArgCount; });
-        }
-        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes);
-            if (typeArgumentNodes) {
-                var typeArguments_1 = ts.map(typeArgumentNodes, getTypeFromTypeNode);
-                signatures = ts.map(signatures, function (sig) { return getSignatureInstantiation(sig, typeArguments_1); });
-            }
-            return signatures;
-        }
-        function getBaseConstructorTypeOfClass(type) {
-            if (!type.resolvedBaseConstructorType) {
-                var baseTypeNode = getBaseTypeNodeOfClass(type);
-                if (!baseTypeNode) {
-                    return type.resolvedBaseConstructorType = undefinedType;
-                }
-                if (!pushTypeResolution(type, 1)) {
-                    return unknownType;
-                }
-                var baseConstructorType = checkExpression(baseTypeNode.expression);
-                if (baseConstructorType.flags & 80896) {
-                    resolveStructuredTypeMembers(baseConstructorType);
-                }
-                if (!popTypeResolution()) {
-                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
-                    return type.resolvedBaseConstructorType = unknownType;
-                }
-                if (baseConstructorType !== unknownType && baseConstructorType !== nullType && !isConstructorType(baseConstructorType)) {
-                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
-                    return type.resolvedBaseConstructorType = unknownType;
-                }
-                type.resolvedBaseConstructorType = baseConstructorType;
-            }
-            return type.resolvedBaseConstructorType;
-        }
-        function getBaseTypes(type) {
-            var isClass = type.symbol.flags & 32;
-            var isInterface = type.symbol.flags & 64;
-            if (!type.resolvedBaseTypes) {
-                if (!isClass && !isInterface) {
-                    ts.Debug.fail("type must be class or interface");
-                }
-                if (isClass) {
-                    resolveBaseTypesOfClass(type);
-                }
-                if (isInterface) {
-                    resolveBaseTypesOfInterface(type);
-                }
-            }
-            return type.resolvedBaseTypes;
-        }
-        function resolveBaseTypesOfClass(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            var baseConstructorType = getBaseConstructorTypeOfClass(type);
-            if (!(baseConstructorType.flags & 80896)) {
-                return;
-            }
-            var baseTypeNode = getBaseTypeNodeOfClass(type);
-            var baseType;
-            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
-            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 &&
-                areAllOuterTypeParametersApplied(originalBaseType)) {
-                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol);
-            }
-            else {
-                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments);
-                if (!constructors.length) {
-                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
-                    return;
-                }
-                baseType = getReturnTypeOfSignature(constructors[0]);
-            }
-            if (baseType === unknownType) {
-                return;
-            }
-            if (!(getTargetType(baseType).flags & (1024 | 2048))) {
-                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
-                return;
-            }
-            if (type === baseType || hasBaseType(baseType, type)) {
-                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 1));
-                return;
-            }
-            if (type.resolvedBaseTypes === emptyArray) {
-                type.resolvedBaseTypes = [baseType];
-            }
-            else {
-                type.resolvedBaseTypes.push(baseType);
-            }
-        }
-        function areAllOuterTypeParametersApplied(type) {
-            var outerTypeParameters = type.outerTypeParameters;
-            if (outerTypeParameters) {
-                var last = outerTypeParameters.length - 1;
-                var typeArguments = type.typeArguments;
-                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
-            }
-            return true;
-        }
-        function resolveBaseTypesOfInterface(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222 && ts.getInterfaceBaseTypeNodes(declaration)) {
-                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
-                        var node = _c[_b];
-                        var baseType = getTypeFromTypeNode(node);
-                        if (baseType !== unknownType) {
-                            if (getTargetType(baseType).flags & (1024 | 2048)) {
-                                if (type !== baseType && !hasBaseType(baseType, type)) {
-                                    if (type.resolvedBaseTypes === emptyArray) {
-                                        type.resolvedBaseTypes = [baseType];
-                                    }
-                                    else {
-                                        type.resolvedBaseTypes.push(baseType);
-                                    }
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 1));
-                                }
-                            }
-                            else {
-                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        function isIndependentInterface(symbol) {
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222) {
-                    if (declaration.flags & 16384) {
-                        return false;
-                    }
-                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
-                    if (baseTypeNodes) {
-                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
-                            var node = baseTypeNodes_1[_b];
-                            if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                                var baseSymbol = resolveEntityName(node.expression, 793056, true);
-                                if (!baseSymbol || !(baseSymbol.flags & 64) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
-                                    return false;
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            return true;
-        }
-        function getDeclaredTypeOfClassOrInterface(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var kind = symbol.flags & 32 ? 1024 : 2048;
-                var type = links.declaredType = createObjectType(kind, symbol);
-                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
-                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                if (outerTypeParameters || localTypeParameters || kind === 1024 || !isIndependentInterface(symbol)) {
-                    type.flags |= 4096;
-                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
-                    type.outerTypeParameters = outerTypeParameters;
-                    type.localTypeParameters = localTypeParameters;
-                    type.instantiations = {};
-                    type.instantiations[getTypeListId(type.typeParameters)] = type;
-                    type.target = type;
-                    type.typeArguments = type.typeParameters;
-                    type.thisType = createType(512 | 33554432);
-                    type.thisType.symbol = symbol;
-                    type.thisType.constraint = type;
-                }
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfTypeAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                if (!pushTypeResolution(symbol, 2)) {
-                    return unknownType;
-                }
-                var declaration = ts.getDeclarationOfKind(symbol, 223);
-                var type = getTypeFromTypeNode(declaration.type);
-                if (popTypeResolution()) {
-                    links.typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                    if (links.typeParameters) {
-                        links.instantiations = {};
-                        links.instantiations[getTypeListId(links.typeParameters)] = type;
-                    }
-                }
-                else {
-                    type = unknownType;
-                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
-                }
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfEnum(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var type = createType(128);
-                type.symbol = symbol;
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfTypeParameter(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var type = createType(512);
-                type.symbol = symbol;
-                if (!ts.getDeclarationOfKind(symbol, 141).constraint) {
-                    type.constraint = noConstraintType;
-                }
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfSymbol(symbol) {
-            ts.Debug.assert((symbol.flags & 16777216) === 0);
-            if (symbol.flags & (32 | 64)) {
-                return getDeclaredTypeOfClassOrInterface(symbol);
-            }
-            if (symbol.flags & 524288) {
-                return getDeclaredTypeOfTypeAlias(symbol);
-            }
-            if (symbol.flags & 384) {
-                return getDeclaredTypeOfEnum(symbol);
-            }
-            if (symbol.flags & 262144) {
-                return getDeclaredTypeOfTypeParameter(symbol);
-            }
-            if (symbol.flags & 8388608) {
-                return getDeclaredTypeOfAlias(symbol);
-            }
-            return unknownType;
-        }
-        function isIndependentTypeReference(node) {
-            if (node.typeArguments) {
-                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
-                    var typeNode = _a[_i];
-                    if (!isIndependentType(typeNode)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        function isIndependentType(node) {
-            switch (node.kind) {
-                case 117:
-                case 132:
-                case 130:
-                case 120:
-                case 133:
-                case 103:
-                case 135:
-                case 93:
-                case 127:
-                case 166:
-                    return true;
-                case 160:
-                    return isIndependentType(node.elementType);
-                case 155:
-                    return isIndependentTypeReference(node);
-            }
-            return false;
-        }
-        function isIndependentVariableLikeDeclaration(node) {
-            return node.type && isIndependentType(node.type) || !node.type && !node.initializer;
-        }
-        function isIndependentFunctionLikeDeclaration(node) {
-            if (node.kind !== 148 && (!node.type || !isIndependentType(node.type))) {
-                return false;
-            }
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                if (!isIndependentVariableLikeDeclaration(parameter)) {
-                    return false;
-                }
-            }
-            return true;
-        }
-        function isIndependentMember(symbol) {
-            if (symbol.declarations && symbol.declarations.length === 1) {
-                var declaration = symbol.declarations[0];
-                if (declaration) {
-                    switch (declaration.kind) {
-                        case 145:
-                        case 144:
-                            return isIndependentVariableLikeDeclaration(declaration);
-                        case 147:
-                        case 146:
-                        case 148:
-                            return isIndependentFunctionLikeDeclaration(declaration);
-                    }
-                }
-            }
-            return false;
-        }
-        function createSymbolTable(symbols) {
-            var result = {};
-            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
-                var symbol = symbols_1[_i];
-                result[symbol.name] = symbol;
-            }
-            return result;
-        }
-        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
-            var result = {};
-            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
-                var symbol = symbols_2[_i];
-                result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper);
-            }
-            return result;
-        }
-        function addInheritedMembers(symbols, baseSymbols) {
-            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
-                var s = baseSymbols_1[_i];
-                if (!ts.hasProperty(symbols, s.name)) {
-                    symbols[s.name] = s;
-                }
-            }
-        }
-        function resolveDeclaredMembers(type) {
-            if (!type.declaredProperties) {
-                var symbol = type.symbol;
-                type.declaredProperties = getNamedMembers(symbol.members);
-                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members["__call"]);
-                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members["__new"]);
-                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
-                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
-            }
-            return type;
-        }
-        function getTypeWithThisArgument(type, thisArgument) {
-            if (type.flags & 4096) {
-                return createTypeReference(type.target, ts.concatenate(type.typeArguments, [thisArgument || type.target.thisType]));
-            }
-            return type;
-        }
-        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
-            var mapper = identityMapper;
-            var members = source.symbol.members;
-            var callSignatures = source.declaredCallSignatures;
-            var constructSignatures = source.declaredConstructSignatures;
-            var stringIndexInfo = source.declaredStringIndexInfo;
-            var numberIndexInfo = source.declaredNumberIndexInfo;
-            if (!ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
-                mapper = createTypeMapper(typeParameters, typeArguments);
-                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, typeParameters.length === 1);
-                callSignatures = instantiateList(source.declaredCallSignatures, mapper, instantiateSignature);
-                constructSignatures = instantiateList(source.declaredConstructSignatures, mapper, instantiateSignature);
-                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
-                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
-            }
-            var baseTypes = getBaseTypes(source);
-            if (baseTypes.length) {
-                if (members === source.symbol.members) {
-                    members = createSymbolTable(source.declaredProperties);
-                }
-                var thisArgument = ts.lastOrUndefined(typeArguments);
-                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
-                    var baseType = baseTypes_1[_i];
-                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
-                    addInheritedMembers(members, getPropertiesOfObjectType(instantiatedBaseType));
-                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0));
-                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1));
-                    stringIndexInfo = stringIndexInfo || getIndexInfoOfType(instantiatedBaseType, 0);
-                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1);
-                }
-            }
-            setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function resolveClassOrInterfaceMembers(type) {
-            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
-        }
-        function resolveTypeReferenceMembers(type) {
-            var source = resolveDeclaredMembers(type.target);
-            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
-            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
-                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
-            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
-        }
-        function createSignature(declaration, typeParameters, thisType, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasStringLiterals) {
-            var sig = new Signature(checker);
-            sig.declaration = declaration;
-            sig.typeParameters = typeParameters;
-            sig.parameters = parameters;
-            sig.thisType = thisType;
-            sig.resolvedReturnType = resolvedReturnType;
-            sig.typePredicate = typePredicate;
-            sig.minArgumentCount = minArgumentCount;
-            sig.hasRestParameter = hasRestParameter;
-            sig.hasStringLiterals = hasStringLiterals;
-            return sig;
-        }
-        function cloneSignature(sig) {
-            return createSignature(sig.declaration, sig.typeParameters, sig.thisType, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasStringLiterals);
-        }
-        function getDefaultConstructSignatures(classType) {
-            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-            var baseSignatures = getSignaturesOfType(baseConstructorType, 1);
-            if (baseSignatures.length === 0) {
-                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, undefined, 0, false, false)];
-            }
-            var baseTypeNode = getBaseTypeNodeOfClass(classType);
-            var typeArguments = ts.map(baseTypeNode.typeArguments, getTypeFromTypeNode);
-            var typeArgCount = typeArguments ? typeArguments.length : 0;
-            var result = [];
-            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
-                var baseSig = baseSignatures_1[_i];
-                var typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
-                if (typeParamCount === typeArgCount) {
-                    var sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
-                    sig.typeParameters = classType.localTypeParameters;
-                    sig.resolvedReturnType = classType;
-                    result.push(sig);
-                }
-            }
-            return result;
-        }
-        function createTupleTypeMemberSymbols(memberTypes) {
-            var members = {};
-            for (var i = 0; i < memberTypes.length; i++) {
-                var symbol = createSymbol(4 | 67108864, "" + i);
-                symbol.type = memberTypes[i];
-                members[i] = symbol;
-            }
-            return members;
-        }
-        function resolveTupleTypeMembers(type) {
-            var arrayElementType = getUnionType(type.elementTypes, true);
-            var arrayType = resolveStructuredTypeMembers(createTypeFromGenericGlobalType(globalArrayType, [arrayElementType, type]));
-            var members = createTupleTypeMemberSymbols(type.elementTypes);
-            addInheritedMembers(members, arrayType.properties);
-            setObjectTypeMembers(type, members, arrayType.callSignatures, arrayType.constructSignatures, arrayType.stringIndexInfo, arrayType.numberIndexInfo);
-        }
-        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
-            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
-                var s = signatureList_1[_i];
-                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
-                    return s;
-                }
-            }
-        }
-        function findMatchingSignatures(signatureLists, signature, listIndex) {
-            if (signature.typeParameters) {
-                if (listIndex > 0) {
-                    return undefined;
-                }
-                for (var i = 1; i < signatureLists.length; i++) {
-                    if (!findMatchingSignature(signatureLists[i], signature, false, false, false)) {
-                        return undefined;
-                    }
-                }
-                return [signature];
-            }
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, true, true, true);
-                if (!match) {
-                    return undefined;
-                }
-                if (!ts.contains(result, match)) {
-                    (result || (result = [])).push(match);
-                }
-            }
-            return result;
-        }
-        function getUnionSignatures(types, kind) {
-            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
-                    var signature = _a[_i];
-                    if (!result || !findMatchingSignature(result, signature, false, true, true)) {
-                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
-                        if (unionSignatures) {
-                            var s = signature;
-                            if (unionSignatures.length > 1) {
-                                s = cloneSignature(signature);
-                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisType; })) {
-                                    s.thisType = getUnionType(ts.map(unionSignatures, function (sig) { return sig.thisType || anyType; }));
-                                }
-                                s.resolvedReturnType = undefined;
-                                s.unionSignatures = unionSignatures;
-                            }
-                            (result || (result = [])).push(s);
-                        }
-                    }
-                }
-            }
-            return result || emptyArray;
-        }
-        function getUnionIndexInfo(types, kind) {
-            var indexTypes = [];
-            var isAnyReadonly = false;
-            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
-                var type = types_1[_i];
-                var indexInfo = getIndexInfoOfType(type, kind);
-                if (!indexInfo) {
-                    return undefined;
-                }
-                indexTypes.push(indexInfo.type);
-                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
-            }
-            return createIndexInfo(getUnionType(indexTypes), isAnyReadonly);
-        }
-        function resolveUnionTypeMembers(type) {
-            var callSignatures = getUnionSignatures(type.types, 0);
-            var constructSignatures = getUnionSignatures(type.types, 1);
-            var stringIndexInfo = getUnionIndexInfo(type.types, 0);
-            var numberIndexInfo = getUnionIndexInfo(type.types, 1);
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function intersectTypes(type1, type2) {
-            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
-        }
-        function intersectIndexInfos(info1, info2) {
-            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
-        }
-        function resolveIntersectionTypeMembers(type) {
-            var callSignatures = emptyArray;
-            var constructSignatures = emptyArray;
-            var stringIndexInfo = undefined;
-            var numberIndexInfo = undefined;
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0));
-                constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(t, 1));
-                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0));
-                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1));
-            }
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function resolveAnonymousTypeMembers(type) {
-            var symbol = type.symbol;
-            if (type.target) {
-                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, false);
-                var callSignatures = instantiateList(getSignaturesOfType(type.target, 0), type.mapper, instantiateSignature);
-                var constructSignatures = instantiateList(getSignaturesOfType(type.target, 1), type.mapper, instantiateSignature);
-                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0), type.mapper);
-                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1), type.mapper);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-            }
-            else if (symbol.flags & 2048) {
-                var members = symbol.members;
-                var callSignatures = getSignaturesOfSymbol(members["__call"]);
-                var constructSignatures = getSignaturesOfSymbol(members["__new"]);
-                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
-                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-            }
-            else {
-                var members = emptySymbols;
-                var constructSignatures = emptyArray;
-                if (symbol.flags & 1952) {
-                    members = getExportsOfSymbol(symbol);
-                }
-                if (symbol.flags & 32) {
-                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
-                    constructSignatures = getSignaturesOfSymbol(symbol.members["__constructor"]);
-                    if (!constructSignatures.length) {
-                        constructSignatures = getDefaultConstructSignatures(classType);
-                    }
-                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-                    if (baseConstructorType.flags & 80896) {
-                        members = createSymbolTable(getNamedMembers(members));
-                        addInheritedMembers(members, getPropertiesOfObjectType(baseConstructorType));
-                    }
-                }
-                var numberIndexInfo = symbol.flags & 384 ? enumNumberIndexInfo : undefined;
-                setObjectTypeMembers(type, members, emptyArray, constructSignatures, undefined, numberIndexInfo);
-                if (symbol.flags & (16 | 8192)) {
-                    type.callSignatures = getSignaturesOfSymbol(symbol);
-                }
-            }
-        }
-        function resolveStructuredTypeMembers(type) {
-            if (!type.members) {
-                if (type.flags & 4096) {
-                    resolveTypeReferenceMembers(type);
-                }
-                else if (type.flags & (1024 | 2048)) {
-                    resolveClassOrInterfaceMembers(type);
-                }
-                else if (type.flags & 65536) {
-                    resolveAnonymousTypeMembers(type);
-                }
-                else if (type.flags & 8192) {
-                    resolveTupleTypeMembers(type);
-                }
-                else if (type.flags & 16384) {
-                    resolveUnionTypeMembers(type);
-                }
-                else if (type.flags & 32768) {
-                    resolveIntersectionTypeMembers(type);
-                }
-            }
-            return type;
-        }
-        function getPropertiesOfObjectType(type) {
-            if (type.flags & 80896) {
-                return resolveStructuredTypeMembers(type).properties;
-            }
-            return emptyArray;
-        }
-        function getPropertyOfObjectType(type, name) {
-            if (type.flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (ts.hasProperty(resolved.members, name)) {
-                    var symbol = resolved.members[name];
-                    if (symbolIsValue(symbol)) {
-                        return symbol;
-                    }
-                }
-            }
-        }
-        function getPropertiesOfUnionOrIntersectionType(type) {
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var current = _a[_i];
-                for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    getPropertyOfUnionOrIntersectionType(type, prop.name);
-                }
-                if (type.flags & 16384) {
-                    break;
-                }
-            }
-            return type.resolvedProperties ? symbolsToArray(type.resolvedProperties) : emptyArray;
-        }
-        function getPropertiesOfType(type) {
-            type = getApparentType(type);
-            return type.flags & 49152 ? getPropertiesOfUnionOrIntersectionType(type) : getPropertiesOfObjectType(type);
-        }
-        function getApparentTypeOfTypeParameter(type) {
-            if (!type.resolvedApparentType) {
-                var constraintType = getConstraintOfTypeParameter(type);
-                while (constraintType && constraintType.flags & 512) {
-                    constraintType = getConstraintOfTypeParameter(constraintType);
-                }
-                type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type);
-            }
-            return type.resolvedApparentType;
-        }
-        function getApparentType(type) {
-            if (type.flags & 512) {
-                type = getApparentTypeOfTypeParameter(type);
-            }
-            if (type.flags & 258) {
-                type = globalStringType;
-            }
-            else if (type.flags & 132) {
-                type = globalNumberType;
-            }
-            else if (type.flags & 8) {
-                type = globalBooleanType;
-            }
-            else if (type.flags & 16777216) {
-                type = getGlobalESSymbolType();
-            }
-            return type;
-        }
-        function createUnionOrIntersectionProperty(containingType, name) {
-            var types = containingType.types;
-            var props;
-            var commonFlags = (containingType.flags & 32768) ? 536870912 : 0;
-            for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
-                var current = types_2[_i];
-                var type = getApparentType(current);
-                if (type !== unknownType) {
-                    var prop = getPropertyOfType(type, name);
-                    if (prop && !(getDeclarationFlagsFromSymbol(prop) & (8 | 16))) {
-                        commonFlags &= prop.flags;
-                        if (!props) {
-                            props = [prop];
-                        }
-                        else if (!ts.contains(props, prop)) {
-                            props.push(prop);
-                        }
-                    }
-                    else if (containingType.flags & 16384) {
-                        return undefined;
-                    }
-                }
-            }
-            if (!props) {
-                return undefined;
-            }
-            if (props.length === 1) {
-                return props[0];
-            }
-            var propTypes = [];
-            var declarations = [];
-            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
-                var prop = props_1[_a];
-                if (prop.declarations) {
-                    ts.addRange(declarations, prop.declarations);
-                }
-                propTypes.push(getTypeOfSymbol(prop));
-            }
-            var result = createSymbol(4 |
-                67108864 |
-                268435456 |
-                commonFlags, name);
-            result.containingType = containingType;
-            result.declarations = declarations;
-            result.type = containingType.flags & 16384 ? getUnionType(propTypes) : getIntersectionType(propTypes);
-            return result;
-        }
-        function getPropertyOfUnionOrIntersectionType(type, name) {
-            var properties = type.resolvedProperties || (type.resolvedProperties = {});
-            if (ts.hasProperty(properties, name)) {
-                return properties[name];
-            }
-            var property = createUnionOrIntersectionProperty(type, name);
-            if (property) {
-                properties[name] = property;
-            }
-            return property;
-        }
-        function getPropertyOfType(type, name) {
-            type = getApparentType(type);
-            if (type.flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (ts.hasProperty(resolved.members, name)) {
-                    var symbol = resolved.members[name];
-                    if (symbolIsValue(symbol)) {
-                        return symbol;
-                    }
-                }
-                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
-                    var symbol = getPropertyOfObjectType(globalFunctionType, name);
-                    if (symbol) {
-                        return symbol;
-                    }
-                }
-                return getPropertyOfObjectType(globalObjectType, name);
-            }
-            if (type.flags & 49152) {
-                return getPropertyOfUnionOrIntersectionType(type, name);
-            }
-            return undefined;
-        }
-        function getSignaturesOfStructuredType(type, kind) {
-            if (type.flags & 130048) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 ? resolved.callSignatures : resolved.constructSignatures;
-            }
-            return emptyArray;
-        }
-        function getSignaturesOfType(type, kind) {
-            return getSignaturesOfStructuredType(getApparentType(type), kind);
-        }
-        function getIndexInfoOfStructuredType(type, kind) {
-            if (type.flags & 130048) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 ? resolved.stringIndexInfo : resolved.numberIndexInfo;
-            }
-        }
-        function getIndexTypeOfStructuredType(type, kind) {
-            var info = getIndexInfoOfStructuredType(type, kind);
-            return info && info.type;
-        }
-        function getIndexInfoOfType(type, kind) {
-            return getIndexInfoOfStructuredType(getApparentType(type), kind);
-        }
-        function getIndexTypeOfType(type, kind) {
-            return getIndexTypeOfStructuredType(getApparentType(type), kind);
-        }
-        function getImplicitIndexTypeOfType(type, kind) {
-            if (isObjectLiteralType(type)) {
-                var propTypes = [];
-                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 || isNumericLiteralName(prop.name)) {
-                        propTypes.push(getTypeOfSymbol(prop));
-                    }
-                }
-                if (propTypes.length) {
-                    return getUnionType(propTypes);
-                }
-            }
-            return undefined;
-        }
-        function getTypeParametersFromJSDocTemplate(declaration) {
-            if (declaration.flags & 134217728) {
-                var templateTag = ts.getJSDocTemplateTag(declaration);
-                if (templateTag) {
-                    return getTypeParametersFromDeclaration(templateTag.typeParameters);
-                }
-            }
-            return undefined;
-        }
-        function getTypeParametersFromDeclaration(typeParameterDeclarations) {
-            var result = [];
-            ts.forEach(typeParameterDeclarations, function (node) {
-                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
-                if (!ts.contains(result, tp)) {
-                    result.push(tp);
-                }
-            });
-            return result;
-        }
-        function symbolsToArray(symbols) {
-            var result = [];
-            for (var id in symbols) {
-                if (!isReservedMemberName(id)) {
-                    result.push(symbols[id]);
-                }
-            }
-            return result;
-        }
-        function isOptionalParameter(node) {
-            if (node.flags & 134217728) {
-                if (node.type && node.type.kind === 268) {
-                    return true;
-                }
-                var paramTag = ts.getCorrespondingJSDocParameterTag(node);
-                if (paramTag) {
-                    if (paramTag.isBracketed) {
-                        return true;
-                    }
-                    if (paramTag.typeExpression) {
-                        return paramTag.typeExpression.type.kind === 268;
-                    }
-                }
-            }
-            if (ts.hasQuestionToken(node)) {
-                return true;
-            }
-            if (node.initializer) {
-                var signatureDeclaration = node.parent;
-                var signature = getSignatureFromDeclaration(signatureDeclaration);
-                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
-                ts.Debug.assert(parameterIndex >= 0);
-                return parameterIndex >= signature.minArgumentCount;
-            }
-            return false;
-        }
-        function createTypePredicateFromTypePredicateNode(node) {
-            if (node.parameterName.kind === 69) {
-                var parameterName = node.parameterName;
-                return {
-                    kind: 1,
-                    parameterName: parameterName ? parameterName.text : undefined,
-                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
-                    type: getTypeFromTypeNode(node.type)
-                };
-            }
-            else {
-                return {
-                    kind: 0,
-                    type: getTypeFromTypeNode(node.type)
-                };
-            }
-        }
-        function getSignatureFromDeclaration(declaration) {
-            var links = getNodeLinks(declaration);
-            if (!links.resolvedSignature) {
-                var parameters = [];
-                var hasStringLiterals = false;
-                var minArgumentCount = -1;
-                var thisType = undefined;
-                var hasThisParameter = void 0;
-                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
-                for (var i = isJSConstructSignature ? 1 : 0, n = declaration.parameters.length; i < n; i++) {
-                    var param = declaration.parameters[i];
-                    var paramSymbol = param.symbol;
-                    if (paramSymbol && !!(paramSymbol.flags & 4) && !ts.isBindingPattern(param.name)) {
-                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455, undefined, undefined);
-                        paramSymbol = resolvedSymbol;
-                    }
-                    if (i === 0 && paramSymbol.name === "this") {
-                        hasThisParameter = true;
-                        thisType = param.type ? getTypeFromTypeNode(param.type) : unknownType;
-                    }
-                    else {
-                        parameters.push(paramSymbol);
-                    }
-                    if (param.type && param.type.kind === 166) {
-                        hasStringLiterals = true;
-                    }
-                    if (param.initializer || param.questionToken || param.dotDotDotToken) {
-                        if (minArgumentCount < 0) {
-                            minArgumentCount = i - (hasThisParameter ? 1 : 0);
-                        }
-                    }
-                    else {
-                        minArgumentCount = -1;
-                    }
-                }
-                if ((declaration.kind === 149 || declaration.kind === 150) &&
-                    !ts.hasDynamicName(declaration) &&
-                    (!hasThisParameter || thisType === unknownType)) {
-                    var otherKind = declaration.kind === 149 ? 150 : 149;
-                    var setter = ts.getDeclarationOfKind(declaration.symbol, otherKind);
-                    thisType = getAnnotatedAccessorThisType(setter);
-                }
-                if (minArgumentCount < 0) {
-                    minArgumentCount = declaration.parameters.length - (hasThisParameter ? 1 : 0);
-                }
-                if (isJSConstructSignature) {
-                    minArgumentCount--;
-                }
-                var classType = declaration.kind === 148 ?
-                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
-                    : undefined;
-                var typeParameters = classType ? classType.localTypeParameters :
-                    declaration.typeParameters ? getTypeParametersFromDeclaration(declaration.typeParameters) :
-                        getTypeParametersFromJSDocTemplate(declaration);
-                var returnType = getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType);
-                var typePredicate = declaration.type && declaration.type.kind === 154 ?
-                    createTypePredicateFromTypePredicateNode(declaration.type) :
-                    undefined;
-                links.resolvedSignature = createSignature(declaration, typeParameters, thisType, parameters, returnType, typePredicate, minArgumentCount, ts.hasRestParameter(declaration), hasStringLiterals);
-            }
-            return links.resolvedSignature;
-        }
-        function getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType) {
-            if (isJSConstructSignature) {
-                return getTypeFromTypeNode(declaration.parameters[0].type);
-            }
-            else if (classType) {
-                return classType;
-            }
-            else if (declaration.type) {
-                return getTypeFromTypeNode(declaration.type);
-            }
-            if (declaration.flags & 134217728) {
-                var type = getReturnTypeFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            if (declaration.kind === 149 && !ts.hasDynamicName(declaration)) {
-                var setter = ts.getDeclarationOfKind(declaration.symbol, 150);
-                return getAnnotatedAccessorType(setter);
-            }
-            if (ts.nodeIsMissing(declaration.body)) {
-                return anyType;
-            }
-        }
-        function getSignaturesOfSymbol(symbol) {
-            if (!symbol)
-                return emptyArray;
-            var result = [];
-            for (var i = 0, len = symbol.declarations.length; i < len; i++) {
-                var node = symbol.declarations[i];
-                switch (node.kind) {
-                    case 156:
-                    case 157:
-                    case 220:
-                    case 147:
-                    case 146:
-                    case 148:
-                    case 151:
-                    case 152:
-                    case 153:
-                    case 149:
-                    case 150:
-                    case 179:
-                    case 180:
-                    case 269:
-                        if (i > 0 && node.body) {
-                            var previous = symbol.declarations[i - 1];
-                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
-                                break;
-                            }
-                        }
-                        result.push(getSignatureFromDeclaration(node));
-                }
-            }
-            return result;
-        }
-        function resolveExternalModuleTypeByLiteral(name) {
-            var moduleSym = resolveExternalModuleName(name, name);
-            if (moduleSym) {
-                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
-                if (resolvedModuleSymbol) {
-                    return getTypeOfSymbol(resolvedModuleSymbol);
-                }
-            }
-            return anyType;
-        }
-        function getReturnTypeOfSignature(signature) {
-            if (!signature.resolvedReturnType) {
-                if (!pushTypeResolution(signature, 3)) {
-                    return unknownType;
-                }
-                var type = void 0;
-                if (signature.target) {
-                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
-                }
-                else if (signature.unionSignatures) {
-                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature));
-                }
-                else {
-                    type = getReturnTypeFromBody(signature.declaration);
-                }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var declaration = signature.declaration;
-                        if (declaration.name) {
-                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
-                        }
-                    }
-                }
-                signature.resolvedReturnType = type;
-            }
-            return signature.resolvedReturnType;
-        }
-        function getRestTypeOfSignature(signature) {
-            if (signature.hasRestParameter) {
-                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
-                if (type.flags & 4096 && type.target === globalArrayType) {
-                    return type.typeArguments[0];
-                }
-            }
-            return anyType;
-        }
-        function getSignatureInstantiation(signature, typeArguments) {
-            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), true);
-        }
-        function getErasedSignature(signature) {
-            if (!signature.typeParameters)
-                return signature;
-            if (!signature.erasedSignatureCache) {
-                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), true);
-            }
-            return signature.erasedSignatureCache;
-        }
-        function getOrCreateTypeFromSignature(signature) {
-            if (!signature.isolatedSignatureType) {
-                var isConstructor = signature.declaration.kind === 148 || signature.declaration.kind === 152;
-                var type = createObjectType(65536 | 262144);
-                type.members = emptySymbols;
-                type.properties = emptyArray;
-                type.callSignatures = !isConstructor ? [signature] : emptyArray;
-                type.constructSignatures = isConstructor ? [signature] : emptyArray;
-                signature.isolatedSignatureType = type;
-            }
-            return signature.isolatedSignatureType;
-        }
-        function getIndexSymbol(symbol) {
-            return symbol.members["__index"];
-        }
-        function getIndexDeclarationOfSymbol(symbol, kind) {
-            var syntaxKind = kind === 1 ? 130 : 132;
-            var indexSymbol = getIndexSymbol(symbol);
-            if (indexSymbol) {
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var node = decl;
-                    if (node.parameters.length === 1) {
-                        var parameter = node.parameters[0];
-                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
-                            return node;
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function createIndexInfo(type, isReadonly, declaration) {
-            return { type: type, isReadonly: isReadonly, declaration: declaration };
-        }
-        function getIndexInfoOfSymbol(symbol, kind) {
-            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
-            if (declaration) {
-                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (declaration.flags & 64) !== 0, declaration);
-            }
-            return undefined;
-        }
-        function getConstraintDeclaration(type) {
-            return ts.getDeclarationOfKind(type.symbol, 141).constraint;
-        }
-        function hasConstraintReferenceTo(type, target) {
-            var checked;
-            while (type && !(type.flags & 33554432) && type.flags & 512 && !ts.contains(checked, type)) {
-                if (type === target) {
-                    return true;
-                }
-                (checked || (checked = [])).push(type);
-                var constraintDeclaration = getConstraintDeclaration(type);
-                type = constraintDeclaration && getTypeFromTypeNode(constraintDeclaration);
-            }
-            return false;
-        }
-        function getConstraintOfTypeParameter(typeParameter) {
-            if (!typeParameter.constraint) {
-                if (typeParameter.target) {
-                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
-                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
-                }
-                else {
-                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
-                    var constraint = getTypeFromTypeNode(constraintDeclaration);
-                    if (hasConstraintReferenceTo(constraint, typeParameter)) {
-                        error(constraintDeclaration, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
-                        constraint = unknownType;
-                    }
-                    typeParameter.constraint = constraint;
-                }
-            }
-            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
-        }
-        function getParentSymbolOfTypeParameter(typeParameter) {
-            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 141).parent);
-        }
-        function getTypeListId(types) {
-            if (types) {
-                switch (types.length) {
-                    case 1:
-                        return "" + types[0].id;
-                    case 2:
-                        return types[0].id + "," + types[1].id;
-                    default:
-                        var result = "";
-                        for (var i = 0; i < types.length; i++) {
-                            if (i > 0) {
-                                result += ",";
-                            }
-                            result += types[i].id;
-                        }
-                        return result;
-                }
-            }
-            return "";
-        }
-        function getPropagatingFlagsOfTypes(types, excludeKinds) {
-            var result = 0;
-            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
-                var type = types_3[_i];
-                if (!(type.flags & excludeKinds)) {
-                    result |= type.flags;
-                }
-            }
-            return result & 14680064;
-        }
-        function createTypeReference(target, typeArguments) {
-            var id = getTypeListId(typeArguments);
-            var type = target.instantiations[id];
-            if (!type) {
-                var propagatedFlags = typeArguments ? getPropagatingFlagsOfTypes(typeArguments, 0) : 0;
-                var flags = 4096 | propagatedFlags;
-                type = target.instantiations[id] = createObjectType(flags, target.symbol);
-                type.target = target;
-                type.typeArguments = typeArguments;
-            }
-            return type;
-        }
-        function getTypeFromClassOrInterfaceReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
-            var typeParameters = type.localTypeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, typeToString(type, undefined, 1), typeParameters.length);
-                    return unknownType;
-                }
-                return createTypeReference(type, ts.concatenate(type.outerTypeParameters, ts.map(node.typeArguments, getTypeFromTypeNode)));
-            }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
-                return unknownType;
-            }
-            return type;
-        }
-        function getTypeFromTypeAliasReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var links = getSymbolLinks(symbol);
-            var typeParameters = links.typeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, symbolToString(symbol), typeParameters.length);
-                    return unknownType;
-                }
-                var typeArguments = ts.map(node.typeArguments, getTypeFromTypeNode);
-                var id = getTypeListId(typeArguments);
-                return links.instantiations[id] || (links.instantiations[id] = instantiateType(type, createTypeMapper(typeParameters, typeArguments)));
-            }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
-            }
-            return type;
-        }
-        function getTypeFromNonGenericTypeReference(node, symbol) {
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
-            }
-            return getDeclaredTypeOfSymbol(symbol);
-        }
-        function getTypeReferenceName(node) {
-            switch (node.kind) {
-                case 155:
-                    return node.typeName;
-                case 267:
-                    return node.name;
-                case 194:
-                    if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                        return node.expression;
-                    }
-            }
-            return undefined;
-        }
-        function resolveTypeReferenceName(node, typeReferenceName) {
-            if (!typeReferenceName) {
-                return unknownSymbol;
-            }
-            return resolveEntityName(typeReferenceName, 793056) || unknownSymbol;
-        }
-        function getTypeReferenceType(node, symbol) {
-            if (symbol === unknownSymbol) {
-                return unknownType;
-            }
-            if (symbol.flags & (32 | 64)) {
-                return getTypeFromClassOrInterfaceReference(node, symbol);
-            }
-            if (symbol.flags & 524288) {
-                return getTypeFromTypeAliasReference(node, symbol);
-            }
-            if (symbol.flags & 107455 && node.kind === 267) {
-                return getTypeOfSymbol(symbol);
-            }
-            return getTypeFromNonGenericTypeReference(node, symbol);
-        }
-        function getTypeFromTypeReference(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var symbol = void 0;
-                var type = void 0;
-                if (node.kind === 267) {
-                    var typeReferenceName = getTypeReferenceName(node);
-                    symbol = resolveTypeReferenceName(node, typeReferenceName);
-                    type = getTypeReferenceType(node, symbol);
-                    links.resolvedSymbol = symbol;
-                    links.resolvedType = type;
-                }
-                else {
-                    var typeNameOrExpression = node.kind === 155 ? node.typeName :
-                        ts.isSupportedExpressionWithTypeArguments(node) ? node.expression :
-                            undefined;
-                    symbol = typeNameOrExpression && resolveEntityName(typeNameOrExpression, 793056) || unknownSymbol;
-                    type = symbol === unknownSymbol ? unknownType :
-                        symbol.flags & (32 | 64) ? getTypeFromClassOrInterfaceReference(node, symbol) :
-                            symbol.flags & 524288 ? getTypeFromTypeAliasReference(node, symbol) :
-                                getTypeFromNonGenericTypeReference(node, symbol);
-                }
-                links.resolvedSymbol = symbol;
-                links.resolvedType = type;
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeQueryNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getWidenedType(checkExpression(node.exprName));
-            }
-            return links.resolvedType;
-        }
-        function getTypeOfGlobalSymbol(symbol, arity) {
-            function getTypeDeclaration(symbol) {
-                var declarations = symbol.declarations;
-                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
-                    var declaration = declarations_3[_i];
-                    switch (declaration.kind) {
-                        case 221:
-                        case 222:
-                        case 224:
-                            return declaration;
-                    }
-                }
-            }
-            if (!symbol) {
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            var type = getDeclaredTypeOfSymbol(symbol);
-            if (!(type.flags & 80896)) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            if ((type.typeParameters ? type.typeParameters.length : 0) !== arity) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            return type;
-        }
-        function getGlobalValueSymbol(name) {
-            return getGlobalSymbol(name, 107455, ts.Diagnostics.Cannot_find_global_value_0);
-        }
-        function getGlobalTypeSymbol(name) {
-            return getGlobalSymbol(name, 793056, ts.Diagnostics.Cannot_find_global_type_0);
-        }
-        function getGlobalSymbol(name, meaning, diagnostic) {
-            return resolveName(undefined, name, meaning, diagnostic, name);
-        }
-        function getGlobalType(name, arity) {
-            if (arity === void 0) { arity = 0; }
-            return getTypeOfGlobalSymbol(getGlobalTypeSymbol(name), arity);
-        }
-        function getExportedTypeFromNamespace(namespace, name) {
-            var namespaceSymbol = getGlobalSymbol(namespace, 1536, undefined);
-            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793056);
-            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
-        }
-        function createTypedPropertyDescriptorType(propertyType) {
-            var globalTypedPropertyDescriptorType = getGlobalTypedPropertyDescriptorType();
-            return globalTypedPropertyDescriptorType !== emptyGenericType
-                ? createTypeReference(globalTypedPropertyDescriptorType, [propertyType])
-                : emptyObjectType;
-        }
-        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
-            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
-        }
-        function createIterableType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableType(), [elementType]);
-        }
-        function createIterableIteratorType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(), [elementType]);
-        }
-        function createArrayType(elementType) {
-            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
-        }
-        function getTypeFromArrayTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
-            }
-            return links.resolvedType;
-        }
-        function createTupleType(elementTypes) {
-            var id = getTypeListId(elementTypes);
-            return tupleTypes[id] || (tupleTypes[id] = createNewTupleType(elementTypes));
-        }
-        function createNewTupleType(elementTypes) {
-            var propagatedFlags = getPropagatingFlagsOfTypes(elementTypes, 0);
-            var type = createObjectType(8192 | propagatedFlags);
-            type.elementTypes = elementTypes;
-            return type;
-        }
-        function getTypeFromTupleTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNode));
-            }
-            return links.resolvedType;
-        }
-        function addTypeToSet(typeSet, type, typeSetKind) {
-            if (type.flags & typeSetKind) {
-                addTypesToSet(typeSet, type.types, typeSetKind);
-            }
-            else if (type.flags & (1 | 32 | 64)) {
-                if (type.flags & 1)
-                    typeSet.containsAny = true;
-                if (type.flags & 32)
-                    typeSet.containsUndefined = true;
-                if (type.flags & 64)
-                    typeSet.containsNull = true;
-            }
-            else if (type !== neverType && !ts.contains(typeSet, type)) {
-                typeSet.push(type);
-            }
-        }
-        function addTypesToSet(typeSet, types, typeSetKind) {
-            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
-                var type = types_4[_i];
-                addTypeToSet(typeSet, type, typeSetKind);
-            }
-        }
-        function isSubtypeOfAny(candidate, types) {
-            for (var i = 0, len = types.length; i < len; i++) {
-                if (candidate !== types[i] && isTypeSubtypeOf(candidate, types[i])) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function removeSubtypes(types) {
-            var i = types.length;
-            while (i > 0) {
-                i--;
-                if (isSubtypeOfAny(types[i], types)) {
-                    types.splice(i, 1);
-                }
-            }
-        }
-        function getUnionType(types, noSubtypeReduction) {
-            if (types.length === 0) {
-                return neverType;
-            }
-            if (types.length === 1) {
-                return types[0];
-            }
-            var typeSet = [];
-            addTypesToSet(typeSet, types, 16384);
-            if (typeSet.containsAny) {
-                return anyType;
-            }
-            if (strictNullChecks) {
-                if (typeSet.containsNull)
-                    typeSet.push(nullType);
-                if (typeSet.containsUndefined)
-                    typeSet.push(undefinedType);
-            }
-            if (!noSubtypeReduction) {
-                removeSubtypes(typeSet);
-            }
-            if (typeSet.length === 0) {
-                return typeSet.containsNull ? nullType :
-                    typeSet.containsUndefined ? undefinedType :
-                        neverType;
-            }
-            else if (typeSet.length === 1) {
-                return typeSet[0];
-            }
-            var id = getTypeListId(typeSet);
-            var type = unionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, 96);
-                type = unionTypes[id] = createObjectType(16384 | propagatedFlags);
-                type.types = typeSet;
-            }
-            return type;
-        }
-        function getTypeFromUnionTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), true);
-            }
-            return links.resolvedType;
-        }
-        function getIntersectionType(types) {
-            if (types.length === 0) {
-                return emptyObjectType;
-            }
-            var typeSet = [];
-            addTypesToSet(typeSet, types, 32768);
-            if (typeSet.containsAny) {
-                return anyType;
-            }
-            if (strictNullChecks) {
-                if (typeSet.containsNull)
-                    typeSet.push(nullType);
-                if (typeSet.containsUndefined)
-                    typeSet.push(undefinedType);
-            }
-            if (typeSet.length === 1) {
-                return typeSet[0];
-            }
-            var id = getTypeListId(typeSet);
-            var type = intersectionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, 96);
-                type = intersectionTypes[id] = createObjectType(32768 | propagatedFlags);
-                type.types = typeSet;
-            }
-            return type;
-        }
-        function getTypeFromIntersectionTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNode));
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createObjectType(65536, node.symbol);
-            }
-            return links.resolvedType;
-        }
-        function getStringLiteralTypeForText(text) {
-            if (ts.hasProperty(stringLiteralTypes, text)) {
-                return stringLiteralTypes[text];
-            }
-            var type = stringLiteralTypes[text] = createType(256);
-            type.text = text;
-            return type;
-        }
-        function getTypeFromStringLiteralTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getStringLiteralTypeForText(ts.unescapeIdentifier(node.text));
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromJSDocVariadicType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var type = getTypeFromTypeNode(node.type);
-                links.resolvedType = type ? createArrayType(type) : unknownType;
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromJSDocTupleType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var types = ts.map(node.types, getTypeFromTypeNode);
-                links.resolvedType = createTupleType(types);
-            }
-            return links.resolvedType;
-        }
-        function getThisType(node) {
-            var container = ts.getThisContainer(node, false);
-            var parent = container && container.parent;
-            if (parent && (ts.isClassLike(parent) || parent.kind === 222)) {
-                if (!(container.flags & 32) &&
-                    (container.kind !== 148 || ts.isNodeDescendentOf(node, container.body))) {
-                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
-                }
-            }
-            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
-            return unknownType;
-        }
-        function getTypeFromThisTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getThisType(node);
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeNode(node) {
-            switch (node.kind) {
-                case 117:
-                case 258:
-                case 259:
-                    return anyType;
-                case 132:
-                    return stringType;
-                case 130:
-                    return numberType;
-                case 120:
-                    return booleanType;
-                case 133:
-                    return esSymbolType;
-                case 103:
-                    return voidType;
-                case 135:
-                    return undefinedType;
-                case 93:
-                    return nullType;
-                case 127:
-                    return neverType;
-                case 165:
-                case 97:
-                    return getTypeFromThisTypeNode(node);
-                case 166:
-                    return getTypeFromStringLiteralTypeNode(node);
-                case 155:
-                case 267:
-                    return getTypeFromTypeReference(node);
-                case 154:
-                    return booleanType;
-                case 194:
-                    return getTypeFromTypeReference(node);
-                case 158:
-                    return getTypeFromTypeQueryNode(node);
-                case 160:
-                case 260:
-                    return getTypeFromArrayTypeNode(node);
-                case 161:
-                    return getTypeFromTupleTypeNode(node);
-                case 162:
-                case 261:
-                    return getTypeFromUnionTypeNode(node);
-                case 163:
-                    return getTypeFromIntersectionTypeNode(node);
-                case 164:
-                case 263:
-                case 264:
-                case 271:
-                case 272:
-                case 268:
-                    return getTypeFromTypeNode(node.type);
-                case 156:
-                case 157:
-                case 159:
-                case 269:
-                case 265:
-                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
-                case 69:
-                case 139:
-                    var symbol = getSymbolAtLocation(node);
-                    return symbol && getDeclaredTypeOfSymbol(symbol);
-                case 262:
-                    return getTypeFromJSDocTupleType(node);
-                case 270:
-                    return getTypeFromJSDocVariadicType(node);
-                default:
-                    return unknownType;
-            }
-        }
-        function instantiateList(items, mapper, instantiator) {
-            if (items && items.length) {
-                var result = [];
-                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
-                    var v = items_1[_i];
-                    result.push(instantiator(v, mapper));
-                }
-                return result;
-            }
-            return items;
-        }
-        function createUnaryTypeMapper(source, target) {
-            return function (t) { return t === source ? target : t; };
-        }
-        function createBinaryTypeMapper(source1, target1, source2, target2) {
-            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
-        }
-        function createArrayTypeMapper(sources, targets) {
-            return function (t) {
-                for (var i = 0; i < sources.length; i++) {
-                    if (t === sources[i]) {
-                        return targets ? targets[i] : anyType;
-                    }
-                }
-                return t;
-            };
-        }
-        function createTypeMapper(sources, targets) {
-            var count = sources.length;
-            var mapper = count == 1 ? createUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
-                count == 2 ? createBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
-                    createArrayTypeMapper(sources, targets);
-            mapper.mappedTypes = sources;
-            return mapper;
-        }
-        function createTypeEraser(sources) {
-            return createTypeMapper(sources, undefined);
-        }
-        function getInferenceMapper(context) {
-            if (!context.mapper) {
-                var mapper = function (t) {
-                    var typeParameters = context.typeParameters;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (t === typeParameters[i]) {
-                            context.inferences[i].isFixed = true;
-                            return getInferredType(context, i);
-                        }
-                    }
-                    return t;
-                };
-                mapper.mappedTypes = context.typeParameters;
-                mapper.context = context;
-                context.mapper = mapper;
-            }
-            return context.mapper;
-        }
-        function identityMapper(type) {
-            return type;
-        }
-        function combineTypeMappers(mapper1, mapper2) {
-            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
-            mapper.mappedTypes = mapper1.mappedTypes;
-            return mapper;
-        }
-        function cloneTypeParameter(typeParameter) {
-            var result = createType(512);
-            result.symbol = typeParameter.symbol;
-            result.target = typeParameter;
-            return result;
-        }
-        function cloneTypePredicate(predicate, mapper) {
-            if (ts.isIdentifierTypePredicate(predicate)) {
-                return {
-                    kind: 1,
-                    parameterName: predicate.parameterName,
-                    parameterIndex: predicate.parameterIndex,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
-            else {
-                return {
-                    kind: 0,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
-        }
-        function instantiateSignature(signature, mapper, eraseTypeParameters) {
-            var freshTypeParameters;
-            var freshTypePredicate;
-            if (signature.typeParameters && !eraseTypeParameters) {
-                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
-                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
-                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
-                    var tp = freshTypeParameters_1[_i];
-                    tp.mapper = mapper;
-                }
-            }
-            if (signature.typePredicate) {
-                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
-            }
-            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisType && instantiateType(signature.thisType, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), instantiateType(signature.resolvedReturnType, mapper), freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasStringLiterals);
-            result.target = signature;
-            result.mapper = mapper;
-            return result;
-        }
-        function instantiateSymbol(symbol, mapper) {
-            if (symbol.flags & 16777216) {
-                var links = getSymbolLinks(symbol);
-                symbol = links.target;
-                mapper = combineTypeMappers(links.mapper, mapper);
-            }
-            var result = createSymbol(16777216 | 67108864 | symbol.flags, symbol.name);
-            result.declarations = symbol.declarations;
-            result.parent = symbol.parent;
-            result.target = symbol;
-            result.mapper = mapper;
-            if (symbol.valueDeclaration) {
-                result.valueDeclaration = symbol.valueDeclaration;
-            }
-            return result;
-        }
-        function instantiateAnonymousType(type, mapper) {
-            if (mapper.instantiations) {
-                var cachedType = mapper.instantiations[type.id];
-                if (cachedType) {
-                    return cachedType;
-                }
-            }
-            else {
-                mapper.instantiations = [];
-            }
-            var result = createObjectType(65536 | 131072, type.symbol);
-            result.target = type;
-            result.mapper = mapper;
-            mapper.instantiations[type.id] = result;
-            return result;
-        }
-        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
-            var mappedTypes = mapper.mappedTypes;
-            var node = symbol.declarations[0].parent;
-            while (node) {
-                switch (node.kind) {
-                    case 156:
-                    case 157:
-                    case 220:
-                    case 147:
-                    case 146:
-                    case 148:
-                    case 151:
-                    case 152:
-                    case 153:
-                    case 149:
-                    case 150:
-                    case 179:
-                    case 180:
-                    case 221:
-                    case 192:
-                    case 222:
-                    case 223:
-                        var declaration = node;
-                        if (declaration.typeParameters) {
-                            for (var _i = 0, _a = declaration.typeParameters; _i < _a.length; _i++) {
-                                var d = _a[_i];
-                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
-                                    return true;
-                                }
-                            }
-                        }
-                        if (ts.isClassLike(node) || node.kind === 222) {
-                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
-                            if (thisType && ts.contains(mappedTypes, thisType)) {
-                                return true;
-                            }
-                        }
-                        break;
-                    case 225:
-                    case 256:
-                        return false;
-                }
-                node = node.parent;
-            }
-            return false;
-        }
-        function instantiateType(type, mapper) {
-            if (type && mapper !== identityMapper) {
-                if (type.flags & 512) {
-                    return mapper(type);
-                }
-                if (type.flags & 65536) {
-                    return type.symbol &&
-                        type.symbol.flags & (16 | 8192 | 32 | 2048 | 4096) &&
-                        (type.flags & 131072 || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
-                        instantiateAnonymousType(type, mapper) : type;
-                }
-                if (type.flags & 4096) {
-                    return createTypeReference(type.target, instantiateList(type.typeArguments, mapper, instantiateType));
-                }
-                if (type.flags & 8192) {
-                    return createTupleType(instantiateList(type.elementTypes, mapper, instantiateType));
-                }
-                if (type.flags & 16384) {
-                    return getUnionType(instantiateList(type.types, mapper, instantiateType), true);
-                }
-                if (type.flags & 32768) {
-                    return getIntersectionType(instantiateList(type.types, mapper, instantiateType));
-                }
-            }
-            return type;
-        }
-        function instantiateIndexInfo(info, mapper) {
-            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
-        }
-        function isContextSensitive(node) {
-            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
-            switch (node.kind) {
-                case 179:
-                case 180:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 171:
-                    return ts.forEach(node.properties, isContextSensitive);
-                case 170:
-                    return ts.forEach(node.elements, isContextSensitive);
-                case 188:
-                    return isContextSensitive(node.whenTrue) ||
-                        isContextSensitive(node.whenFalse);
-                case 187:
-                    return node.operatorToken.kind === 52 &&
-                        (isContextSensitive(node.left) || isContextSensitive(node.right));
-                case 253:
-                    return isContextSensitive(node.initializer);
-                case 147:
-                case 146:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 178:
-                    return isContextSensitive(node.expression);
-            }
-            return false;
-        }
-        function isContextSensitiveFunctionLikeDeclaration(node) {
-            var areAllParametersUntyped = !ts.forEach(node.parameters, function (p) { return p.type; });
-            var isNullaryArrow = node.kind === 180 && !node.parameters.length;
-            return !node.typeParameters && areAllParametersUntyped && !isNullaryArrow;
-        }
-        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
-            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
-        }
-        function getTypeWithoutSignatures(type) {
-            if (type.flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.constructSignatures.length) {
-                    var result = createObjectType(65536, type.symbol);
-                    result.members = resolved.members;
-                    result.properties = resolved.properties;
-                    result.callSignatures = emptyArray;
-                    result.constructSignatures = emptyArray;
-                    type = result;
-                }
-            }
-            return type;
-        }
-        function isTypeIdenticalTo(source, target) {
-            return checkTypeRelatedTo(source, target, identityRelation, undefined);
-        }
-        function compareTypesIdentical(source, target) {
-            return checkTypeRelatedTo(source, target, identityRelation, undefined) ? -1 : 0;
-        }
-        function compareTypesAssignable(source, target) {
-            return checkTypeRelatedTo(source, target, assignableRelation, undefined) ? -1 : 0;
-        }
-        function isTypeSubtypeOf(source, target) {
-            return checkTypeSubtypeOf(source, target, undefined);
-        }
-        function isTypeAssignableTo(source, target) {
-            return checkTypeAssignableTo(source, target, undefined);
-        }
-        function isTypeComparableTo(source, target) {
-            return checkTypeComparableTo(source, target, undefined);
-        }
-        function checkTypeSubtypeOf(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
-            return compareSignaturesRelated(source, target, ignoreReturnTypes, false, undefined, compareTypesAssignable) !== 0;
-        }
-        function compareSignaturesRelated(source, target, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
-            if (source === target) {
-                return -1;
-            }
-            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
-                return 0;
-            }
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1;
-            if (source.thisType && target.thisType && source.thisType !== voidType) {
-                var related = compareTypes(source.thisType, target.thisType, false)
-                    || compareTypes(target.thisType, source.thisType, reportErrors);
-                if (!related) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
-                    }
-                    return 0;
-                }
-                result &= related;
-            }
-            var sourceMax = getNumNonRestParameters(source);
-            var targetMax = getNumNonRestParameters(target);
-            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
-            var sourceParams = source.parameters;
-            var targetParams = target.parameters;
-            for (var i = 0; i < checkCount; i++) {
-                var s = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
-                var t = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
-                var related = compareTypes(s, t, false) || compareTypes(t, s, reportErrors);
-                if (!related) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
-                    }
-                    return 0;
-                }
-                result &= related;
-            }
-            if (!ignoreReturnTypes) {
-                var targetReturnType = getReturnTypeOfSignature(target);
-                if (targetReturnType === voidType) {
-                    return result;
-                }
-                var sourceReturnType = getReturnTypeOfSignature(source);
-                if (target.typePredicate) {
-                    if (source.typePredicate) {
-                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
-                    }
-                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
-                        if (reportErrors) {
-                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
-                        }
-                        return 0;
-                    }
-                }
-                else {
-                    result &= compareTypes(sourceReturnType, targetReturnType, reportErrors);
-                }
-            }
-            return result;
-        }
-        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
-            if (source.kind !== target.kind) {
-                if (reportErrors) {
-                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
-                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-                }
-                return 0;
-            }
-            if (source.kind === 1) {
-                var sourceIdentifierPredicate = source;
-                var targetIdentifierPredicate = target;
-                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
-                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-                    }
-                    return 0;
-                }
-            }
-            var related = compareTypes(source.type, target.type, reportErrors);
-            if (related === 0 && reportErrors) {
-                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-            }
-            return related;
-        }
-        function isImplementationCompatibleWithOverload(implementation, overload) {
-            var erasedSource = getErasedSignature(implementation);
-            var erasedTarget = getErasedSignature(overload);
-            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
-            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
-            if (targetReturnType === voidType
-                || checkTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation, undefined)
-                || checkTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation, undefined)) {
-                return isSignatureAssignableTo(erasedSource, erasedTarget, true);
-            }
-            return false;
-        }
-        function getNumNonRestParameters(signature) {
-            var numParams = signature.parameters.length;
-            return signature.hasRestParameter ?
-                numParams - 1 :
-                numParams;
-        }
-        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
-            if (source.hasRestParameter === target.hasRestParameter) {
-                if (source.hasRestParameter) {
-                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
-                }
-                else {
-                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
-                }
-            }
-            else {
-                return source.hasRestParameter ?
-                    targetNonRestParamCount :
-                    sourceNonRestParamCount;
-            }
-        }
-        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
-            var errorInfo;
-            var sourceStack;
-            var targetStack;
-            var maybeStack;
-            var expandingFlags;
-            var depth = 0;
-            var overflow = false;
-            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
-            var result = isRelatedTo(source, target, !!errorNode, headMessage);
-            if (overflow) {
-                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
-            }
-            else if (errorInfo) {
-                if (containingMessageChain) {
-                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
-                }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
-            }
-            return result !== 0;
-            function reportError(message, arg0, arg1, arg2) {
-                ts.Debug.assert(!!errorNode);
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
-            }
-            function reportRelationError(message, source, target) {
-                var sourceType = typeToString(source);
-                var targetType = typeToString(target);
-                if (sourceType === targetType) {
-                    sourceType = typeToString(source, undefined, 128);
-                    targetType = typeToString(target, undefined, 128);
-                }
-                if (!message) {
-                    message = relation === comparableRelation ?
-                        ts.Diagnostics.Type_0_is_not_comparable_to_type_1 :
-                        ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
-                }
-                reportError(message, sourceType, targetType);
-            }
-            function isRelatedTo(source, target, reportErrors, headMessage) {
-                var result;
-                if (source === target)
-                    return -1;
-                if (relation === identityRelation) {
-                    return isIdenticalTo(source, target);
-                }
-                if (!(target.flags & 134217728)) {
-                    if (target.flags & 1 || source.flags & 134217728)
-                        return -1;
-                    if (source.flags & 32) {
-                        if (!strictNullChecks || target.flags & (32 | 16) || source === emptyArrayElementType)
-                            return -1;
-                    }
-                    if (source.flags & 64) {
-                        if (!strictNullChecks || target.flags & 64)
-                            return -1;
-                    }
-                    if (source.flags & 128 && target === numberType)
-                        return -1;
-                    if (source.flags & 128 && target.flags & 128) {
-                        if (result = enumRelatedTo(source, target, reportErrors)) {
-                            return result;
-                        }
-                    }
-                    if (source.flags & 256 && target === stringType)
-                        return -1;
-                    if (relation === assignableRelation || relation === comparableRelation) {
-                        if (source.flags & 1)
-                            return -1;
-                        if (source === numberType && target.flags & 128)
-                            return -1;
-                    }
-                    if (source.flags & 8 && target.flags & 8) {
-                        return -1;
-                    }
-                }
-                if (source.flags & 1048576) {
-                    if (hasExcessProperties(source, target, reportErrors)) {
-                        if (reportErrors) {
-                            reportRelationError(headMessage, source, target);
-                        }
-                        return 0;
-                    }
-                    if (target.flags & 49152) {
-                        source = getRegularTypeOfObjectLiteral(source);
-                    }
-                }
-                var saveErrorInfo = errorInfo;
-                if (source.flags & 16384) {
-                    if (relation === comparableRelation) {
-                        result = someTypeRelatedToType(source, target, reportErrors);
-                    }
-                    else {
-                        result = eachTypeRelatedToType(source, target, reportErrors);
-                    }
-                    if (result) {
-                        return result;
-                    }
-                }
-                else if (target.flags & 32768) {
-                    result = typeRelatedToEachType(source, target, reportErrors);
-                    if (result) {
-                        return result;
-                    }
-                }
-                else {
-                    if (source.flags & 32768) {
-                        if (result = someTypeRelatedToType(source, target, false)) {
-                            return result;
-                        }
-                    }
-                    if (target.flags & 16384) {
-                        if (result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 16777726))) {
-                            return result;
-                        }
-                    }
-                }
-                if (source.flags & 512) {
-                    var constraint = getConstraintOfTypeParameter(source);
-                    if (!constraint || constraint.flags & 1) {
-                        constraint = emptyObjectType;
-                    }
-                    constraint = getTypeWithThisArgument(constraint, source);
-                    var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
-                    if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
-                        errorInfo = saveErrorInfo;
-                        return result;
-                    }
-                }
-                else {
-                    if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
-                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
-                            return result;
-                        }
-                    }
-                    var apparentSource = getApparentType(source);
-                    if (apparentSource.flags & (80896 | 32768) && target.flags & 80896) {
-                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !(source.flags & 16777726);
-                        if (result = objectTypeRelatedTo(apparentSource, source, target, reportStructuralErrors)) {
-                            errorInfo = saveErrorInfo;
-                            return result;
-                        }
-                    }
-                }
-                if (reportErrors) {
-                    reportRelationError(headMessage, source, target);
-                }
-                return 0;
-            }
-            function isIdenticalTo(source, target) {
-                var result;
-                if (source.flags & 80896 && target.flags & 80896) {
-                    if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
-                        if (result = typeArgumentsRelatedTo(source, target, false)) {
-                            return result;
-                        }
-                    }
-                    return objectTypeRelatedTo(source, source, target, false);
-                }
-                if (source.flags & 16384 && target.flags & 16384 ||
-                    source.flags & 32768 && target.flags & 32768) {
-                    if (result = eachTypeRelatedToSomeType(source, target, false)) {
-                        if (result &= eachTypeRelatedToSomeType(target, source, false)) {
-                            return result;
-                        }
-                    }
-                }
-                return 0;
-            }
-            function isKnownProperty(type, name) {
-                if (type.flags & 80896) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if ((relation === assignableRelation || relation === comparableRelation) &&
-                        (type === globalObjectType || isEmptyObjectType(resolved)) ||
-                        resolved.stringIndexInfo || resolved.numberIndexInfo || getPropertyOfType(type, name)) {
-                        return true;
-                    }
-                }
-                else if (type.flags & 49152) {
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (isKnownProperty(t, name)) {
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
-            function isEmptyObjectType(t) {
-                return t.properties.length === 0 &&
-                    t.callSignatures.length === 0 &&
-                    t.constructSignatures.length === 0 &&
-                    !t.stringIndexInfo &&
-                    !t.numberIndexInfo;
-            }
-            function hasExcessProperties(source, target, reportErrors) {
-                if (!(target.flags & 67108864) && maybeTypeOfKind(target, 80896)) {
-                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                        var prop = _a[_i];
-                        if (!isKnownProperty(target, prop.name)) {
-                            if (reportErrors) {
-                                ts.Debug.assert(!!errorNode);
-                                errorNode = prop.valueDeclaration;
-                                reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
-                            }
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
-            function eachTypeRelatedToSomeType(source, target, reportErrors) {
-                var result = -1;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
-                    var sourceType = sourceTypes_1[_i];
-                    var related = typeRelatedToSomeType(sourceType, target, false);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function typeRelatedToSomeType(source, target, reportErrors) {
-                var targetTypes = target.types;
-                var len = targetTypes.length;
-                while (len >= 2 && targetTypes[len - 1].flags & 96) {
-                    var related = isRelatedTo(source, targetTypes[len - 1], false);
-                    if (related) {
-                        return related;
-                    }
-                    len--;
-                }
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(source, targetTypes[i], reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
-                    }
-                }
-                return 0;
-            }
-            function typeRelatedToEachType(source, target, reportErrors) {
-                var result = -1;
-                var targetTypes = target.types;
-                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
-                    var targetType = targetTypes_1[_i];
-                    var related = isRelatedTo(source, targetType, reportErrors);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function someTypeRelatedToType(source, target, reportErrors) {
-                var sourceTypes = source.types;
-                var len = sourceTypes.length;
-                while (len >= 2 && sourceTypes[len - 1].flags & 96) {
-                    var related = isRelatedTo(sourceTypes[len - 1], target, false);
-                    if (related) {
-                        return related;
-                    }
-                    len--;
-                }
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
-                    }
-                }
-                return 0;
-            }
-            function eachTypeRelatedToType(source, target, reportErrors) {
-                var result = -1;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
-                    var sourceType = sourceTypes_2[_i];
-                    var related = isRelatedTo(sourceType, target, reportErrors);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function typeArgumentsRelatedTo(source, target, reportErrors) {
-                var sources = source.typeArguments || emptyArray;
-                var targets = target.typeArguments || emptyArray;
-                if (sources.length !== targets.length && relation === identityRelation) {
-                    return 0;
-                }
-                var length = sources.length <= targets.length ? sources.length : targets.length;
-                var result = -1;
-                for (var i = 0; i < length; i++) {
-                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function objectTypeRelatedTo(source, originalSource, target, reportErrors) {
-                if (overflow) {
-                    return 0;
-                }
-                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
-                var related = relation[id];
-                if (related !== undefined) {
-                    if (reportErrors && related === 2) {
-                        relation[id] = 3;
-                    }
-                    else {
-                        return related === 1 ? -1 : 0;
-                    }
-                }
-                if (depth > 0) {
-                    for (var i = 0; i < depth; i++) {
-                        if (maybeStack[i][id]) {
-                            return 1;
-                        }
-                    }
-                    if (depth === 100) {
-                        overflow = true;
-                        return 0;
-                    }
-                }
-                else {
-                    sourceStack = [];
-                    targetStack = [];
-                    maybeStack = [];
-                    expandingFlags = 0;
-                }
-                sourceStack[depth] = source;
-                targetStack[depth] = target;
-                maybeStack[depth] = {};
-                maybeStack[depth][id] = 1;
-                depth++;
-                var saveExpandingFlags = expandingFlags;
-                if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth))
-                    expandingFlags |= 1;
-                if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth))
-                    expandingFlags |= 2;
-                var result;
-                if (expandingFlags === 3) {
-                    result = 1;
-                }
-                else {
-                    result = propertiesRelatedTo(source, target, reportErrors);
-                    if (result) {
-                        result &= signaturesRelatedTo(source, target, 0, reportErrors);
-                        if (result) {
-                            result &= signaturesRelatedTo(source, target, 1, reportErrors);
-                            if (result) {
-                                result &= indexTypesRelatedTo(source, originalSource, target, 0, reportErrors);
-                                if (result) {
-                                    result &= indexTypesRelatedTo(source, originalSource, target, 1, reportErrors);
-                                }
-                            }
-                        }
-                    }
-                }
-                expandingFlags = saveExpandingFlags;
-                depth--;
-                if (result) {
-                    var maybeCache = maybeStack[depth];
-                    var destinationCache = (result === -1 || depth === 0) ? relation : maybeStack[depth - 1];
-                    ts.copyMap(maybeCache, destinationCache);
-                }
-                else {
-                    relation[id] = reportErrors ? 3 : 2;
-                }
-                return result;
-            }
-            function propertiesRelatedTo(source, target, reportErrors) {
-                if (relation === identityRelation) {
-                    return propertiesIdenticalTo(source, target);
-                }
-                var result = -1;
-                var properties = getPropertiesOfObjectType(target);
-                var requireOptionalProperties = relation === subtypeRelation && !(source.flags & 524288);
-                for (var _i = 0, properties_1 = properties; _i < properties_1.length; _i++) {
-                    var targetProp = properties_1[_i];
-                    var sourceProp = getPropertyOfType(source, targetProp.name);
-                    if (sourceProp !== targetProp) {
-                        if (!sourceProp) {
-                            if (!(targetProp.flags & 536870912) || requireOptionalProperties) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
-                                }
-                                return 0;
-                            }
-                        }
-                        else if (!(targetProp.flags & 134217728)) {
-                            var sourcePropFlags = getDeclarationFlagsFromSymbol(sourceProp);
-                            var targetPropFlags = getDeclarationFlagsFromSymbol(targetProp);
-                            if (sourcePropFlags & 8 || targetPropFlags & 8) {
-                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
-                                    if (reportErrors) {
-                                        if (sourcePropFlags & 8 && targetPropFlags & 8) {
-                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
-                                        }
-                                        else {
-                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 ? source : target), typeToString(sourcePropFlags & 8 ? target : source));
-                                        }
-                                    }
-                                    return 0;
-                                }
-                            }
-                            else if (targetPropFlags & 16) {
-                                var sourceDeclaredInClass = sourceProp.parent && sourceProp.parent.flags & 32;
-                                var sourceClass = sourceDeclaredInClass ? getDeclaredTypeOfSymbol(getParentOfSymbol(sourceProp)) : undefined;
-                                var targetClass = getDeclaredTypeOfSymbol(getParentOfSymbol(targetProp));
-                                if (!sourceClass || !hasBaseType(sourceClass, targetClass)) {
-                                    if (reportErrors) {
-                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(sourceClass || source), typeToString(targetClass));
-                                    }
-                                    return 0;
-                                }
-                            }
-                            else if (sourcePropFlags & 16) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0;
-                            }
-                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
-                            if (!related) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
-                                }
-                                return 0;
-                            }
-                            result &= related;
-                            if (sourceProp.flags & 536870912 && !(targetProp.flags & 536870912)) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0;
-                            }
-                        }
-                    }
-                }
-                return result;
-            }
-            function propertiesIdenticalTo(source, target) {
-                if (!(source.flags & 80896 && target.flags & 80896)) {
-                    return 0;
-                }
-                var sourceProperties = getPropertiesOfObjectType(source);
-                var targetProperties = getPropertiesOfObjectType(target);
-                if (sourceProperties.length !== targetProperties.length) {
-                    return 0;
-                }
-                var result = -1;
-                for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
-                    var sourceProp = sourceProperties_1[_i];
-                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
-                    if (!targetProp) {
-                        return 0;
-                    }
-                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function signaturesRelatedTo(source, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return signaturesIdenticalTo(source, target, kind);
-                }
-                if (target === anyFunctionType || source === anyFunctionType) {
-                    return -1;
-                }
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (kind === 1 && sourceSignatures.length && targetSignatures.length) {
-                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
-                        if (reportErrors) {
-                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
-                        }
-                        return 0;
-                    }
-                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
-                        return 0;
-                    }
-                }
-                var result = -1;
-                var saveErrorInfo = errorInfo;
-                outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
-                    var t = targetSignatures_1[_i];
-                    var shouldElaborateErrors = reportErrors;
-                    for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
-                        var s = sourceSignatures_1[_a];
-                        var related = signatureRelatedTo(s, t, shouldElaborateErrors);
-                        if (related) {
-                            result &= related;
-                            errorInfo = saveErrorInfo;
-                            continue outer;
-                        }
-                        shouldElaborateErrors = false;
-                    }
-                    if (shouldElaborateErrors) {
-                        reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, undefined, undefined, kind));
-                    }
-                    return 0;
-                }
-                return result;
-            }
-            function signatureRelatedTo(source, target, reportErrors) {
-                return compareSignaturesRelated(source, target, false, reportErrors, reportError, isRelatedTo);
-            }
-            function signaturesIdenticalTo(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (sourceSignatures.length !== targetSignatures.length) {
-                    return 0;
-                }
-                var result = -1;
-                for (var i = 0, len = sourceSignatures.length; i < len; i++) {
-                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], false, false, false, isRelatedTo);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
-                var result = -1;
-                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 || isNumericLiteralName(prop.name)) {
-                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
-                        if (!related) {
-                            if (reportErrors) {
-                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
-                            }
-                            return 0;
-                        }
-                        result &= related;
-                    }
-                }
-                return result;
-            }
-            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
-                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
-                if (!related && reportErrors) {
-                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
-                }
-                return related;
-            }
-            function indexTypesRelatedTo(source, originalSource, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return indexTypesIdenticalTo(source, target, kind);
-                }
-                var targetInfo = getIndexInfoOfType(target, kind);
-                if (!targetInfo || ((targetInfo.type.flags & 1) && !(originalSource.flags & 16777726))) {
-                    return -1;
-                }
-                var sourceInfo = getIndexInfoOfType(source, kind) ||
-                    kind === 1 && getIndexInfoOfType(source, 0);
-                if (sourceInfo) {
-                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
-                }
-                if (isObjectLiteralType(source)) {
-                    var related = -1;
-                    if (kind === 0) {
-                        var sourceNumberInfo = getIndexInfoOfType(source, 1);
-                        if (sourceNumberInfo) {
-                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
-                        }
-                    }
-                    if (related) {
-                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
-                    }
-                    return related;
-                }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
-                }
-                return 0;
-            }
-            function indexTypesIdenticalTo(source, target, indexKind) {
-                var targetInfo = getIndexInfoOfType(target, indexKind);
-                var sourceInfo = getIndexInfoOfType(source, indexKind);
-                if (!sourceInfo && !targetInfo) {
-                    return -1;
-                }
-                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
-                    return isRelatedTo(sourceInfo.type, targetInfo.type);
-                }
-                return 0;
-            }
-            function enumRelatedTo(source, target, reportErrors) {
-                if (source.symbol.name !== target.symbol.name ||
-                    source.symbol.flags & 128 ||
-                    target.symbol.flags & 128) {
-                    return 0;
-                }
-                var targetEnumType = getTypeOfSymbol(target.symbol);
-                for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
-                    var property = _a[_i];
-                    if (property.flags & 8) {
-                        var targetProperty = getPropertyOfType(targetEnumType, property.name);
-                        if (!targetProperty || !(targetProperty.flags & 8)) {
-                            if (reportErrors) {
-                                reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, undefined, 128));
-                            }
-                            return 0;
-                        }
-                    }
-                }
-                return -1;
-            }
-            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
-                if (!sourceSignature.declaration || !targetSignature.declaration) {
-                    return true;
-                }
-                var sourceAccessibility = sourceSignature.declaration.flags & (8 | 16);
-                var targetAccessibility = targetSignature.declaration.flags & (8 | 16);
-                if (targetAccessibility === 8) {
-                    return true;
-                }
-                if (targetAccessibility === 16 && sourceAccessibility !== 8) {
-                    return true;
-                }
-                if (targetAccessibility !== 16 && !sourceAccessibility) {
-                    return true;
-                }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
-                }
-                return false;
-            }
-        }
-        function isAbstractConstructorType(type) {
-            if (type.flags & 65536) {
-                var symbol = type.symbol;
-                if (symbol && symbol.flags & 32) {
-                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
-                    if (declaration && declaration.flags & 128) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isDeeplyNestedGeneric(type, stack, depth) {
-            if (type.flags & (4096 | 131072) && depth >= 5) {
-                var symbol = type.symbol;
-                var count = 0;
-                for (var i = 0; i < depth; i++) {
-                    var t = stack[i];
-                    if (t.flags & (4096 | 131072) && t.symbol === symbol) {
-                        count++;
-                        if (count >= 5)
-                            return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isPropertyIdenticalTo(sourceProp, targetProp) {
-            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0;
-        }
-        function compareProperties(sourceProp, targetProp, compareTypes) {
-            if (sourceProp === targetProp) {
-                return -1;
-            }
-            var sourcePropAccessibility = getDeclarationFlagsFromSymbol(sourceProp) & (8 | 16);
-            var targetPropAccessibility = getDeclarationFlagsFromSymbol(targetProp) & (8 | 16);
-            if (sourcePropAccessibility !== targetPropAccessibility) {
-                return 0;
-            }
-            if (sourcePropAccessibility) {
-                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
-                    return 0;
-                }
-            }
-            else {
-                if ((sourceProp.flags & 536870912) !== (targetProp.flags & 536870912)) {
-                    return 0;
-                }
-            }
-            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
-                return 0;
-            }
-            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
-        }
-        function isMatchingSignature(source, target, partialMatch) {
-            if (source.parameters.length === target.parameters.length &&
-                source.minArgumentCount === target.minArgumentCount &&
-                source.hasRestParameter === target.hasRestParameter) {
-                return true;
-            }
-            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (source.hasRestParameter && !target.hasRestParameter ||
-                source.hasRestParameter === target.hasRestParameter && source.parameters.length >= target.parameters.length)) {
-                return true;
-            }
-            return false;
-        }
-        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
-            if (source === target) {
-                return -1;
-            }
-            if (!(isMatchingSignature(source, target, partialMatch))) {
-                return 0;
-            }
-            if ((source.typeParameters ? source.typeParameters.length : 0) !== (target.typeParameters ? target.typeParameters.length : 0)) {
-                return 0;
-            }
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1;
-            if (!ignoreThisTypes && source.thisType && target.thisType) {
-                var related = compareTypes(source.thisType, target.thisType);
-                if (!related) {
-                    return 0;
-                }
-                result &= related;
-            }
-            var targetLen = target.parameters.length;
-            for (var i = 0; i < targetLen; i++) {
-                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
-                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
-                var related = compareTypes(s, t);
-                if (!related) {
-                    return 0;
-                }
-                result &= related;
-            }
-            if (!ignoreReturnTypes) {
-                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
-            }
-            return result;
-        }
-        function isRestParameterIndex(signature, parameterIndex) {
-            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
-        }
-        function isSupertypeOfEach(candidate, types) {
-            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
-                var t = types_5[_i];
-                if (candidate !== t && !isTypeSubtypeOf(t, candidate))
-                    return false;
-            }
-            return true;
-        }
-        function getCombinedFlagsOfTypes(types) {
-            var flags = 0;
-            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
-                var t = types_6[_i];
-                flags |= t.flags;
-            }
-            return flags;
-        }
-        function getCommonSupertype(types) {
-            if (!strictNullChecks) {
-                return ts.forEach(types, function (t) { return isSupertypeOfEach(t, types) ? t : undefined; });
-            }
-            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 96); });
-            if (!primaryTypes.length) {
-                return getUnionType(types);
-            }
-            var supertype = ts.forEach(primaryTypes, function (t) { return isSupertypeOfEach(t, primaryTypes) ? t : undefined; });
-            return supertype && addNullableKind(supertype, getCombinedFlagsOfTypes(types) & 96);
-        }
-        function reportNoCommonSupertypeError(types, errorLocation, errorMessageChainHead) {
-            var bestSupertype;
-            var bestSupertypeDownfallType;
-            var bestSupertypeScore = 0;
-            for (var i = 0; i < types.length; i++) {
-                var score = 0;
-                var downfallType = undefined;
-                for (var j = 0; j < types.length; j++) {
-                    if (isTypeSubtypeOf(types[j], types[i])) {
-                        score++;
-                    }
-                    else if (!downfallType) {
-                        downfallType = types[j];
-                    }
-                }
-                ts.Debug.assert(!!downfallType, "If there is no common supertype, each type should have a downfallType");
-                if (score > bestSupertypeScore) {
-                    bestSupertype = types[i];
-                    bestSupertypeDownfallType = downfallType;
-                    bestSupertypeScore = score;
-                }
-                if (bestSupertypeScore === types.length - 1) {
-                    break;
-                }
-            }
-            checkTypeSubtypeOf(bestSupertypeDownfallType, bestSupertype, errorLocation, ts.Diagnostics.Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0, errorMessageChainHead);
-        }
-        function isArrayType(type) {
-            return type.flags & 4096 && type.target === globalArrayType;
-        }
-        function isArrayLikeType(type) {
-            return type.flags & 4096 && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
-                !(type.flags & 96) && isTypeAssignableTo(type, anyReadonlyArrayType);
-        }
-        function isTupleLikeType(type) {
-            return !!getPropertyOfType(type, "0");
-        }
-        function isStringLiteralType(type) {
-            return type.flags & 256;
-        }
-        function isTupleType(type) {
-            return !!(type.flags & 8192);
-        }
-        function getNullableKind(type) {
-            var flags = type.flags;
-            if (flags & 16384) {
-                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    flags |= t.flags;
-                }
-            }
-            return flags & 96;
-        }
-        function addNullableKind(type, kind) {
-            if ((getNullableKind(type) & kind) !== kind) {
-                var types = [type];
-                if (kind & 32) {
-                    types.push(undefinedType);
-                }
-                if (kind & 64) {
-                    types.push(nullType);
-                }
-                type = getUnionType(types);
-            }
-            return type;
-        }
-        function getNonNullableType(type) {
-            return strictNullChecks ? getTypeWithFacts(type, 524288) : type;
-        }
-        function isObjectLiteralType(type) {
-            return type.symbol && (type.symbol.flags & (4096 | 2048)) !== 0 &&
-                getSignaturesOfType(type, 0).length === 0 &&
-                getSignaturesOfType(type, 1).length === 0;
-        }
-        function createTransientSymbol(source, type) {
-            var symbol = createSymbol(source.flags | 67108864, source.name);
-            symbol.declarations = source.declarations;
-            symbol.parent = source.parent;
-            symbol.type = type;
-            symbol.target = source;
-            if (source.valueDeclaration) {
-                symbol.valueDeclaration = source.valueDeclaration;
-            }
-            return symbol;
-        }
-        function transformTypeOfMembers(type, f) {
-            var members = {};
-            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
-                var property = _a[_i];
-                var original = getTypeOfSymbol(property);
-                var updated = f(original);
-                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
-            }
-            ;
-            return members;
-        }
-        function getRegularTypeOfObjectLiteral(type) {
-            if (!(type.flags & 1048576)) {
-                return type;
-            }
-            var regularType = type.regularType;
-            if (regularType) {
-                return regularType;
-            }
-            var resolved = type;
-            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
-            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
-            regularNew.flags = resolved.flags & ~1048576;
-            type.regularType = regularNew;
-            return regularNew;
-        }
-        function getWidenedTypeOfObjectLiteral(type) {
-            var members = transformTypeOfMembers(type, function (prop) {
-                var widened = getWidenedType(prop);
-                return prop === widened ? prop : widened;
-            });
-            var stringIndexInfo = getIndexInfoOfType(type, 0);
-            var numberIndexInfo = getIndexInfoOfType(type, 1);
-            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
-        }
-        function getWidenedConstituentType(type) {
-            return type.flags & 96 ? type : getWidenedType(type);
-        }
-        function getWidenedType(type) {
-            if (type.flags & 6291456) {
-                if (type.flags & 96) {
-                    return anyType;
-                }
-                if (type.flags & 524288) {
-                    return getWidenedTypeOfObjectLiteral(type);
-                }
-                if (type.flags & 16384) {
-                    return getUnionType(ts.map(type.types, getWidenedConstituentType), true);
-                }
-                if (isArrayType(type)) {
-                    return createArrayType(getWidenedType(type.typeArguments[0]));
-                }
-                if (isTupleType(type)) {
-                    return createTupleType(ts.map(type.elementTypes, getWidenedType));
-                }
-            }
-            return type;
-        }
-        function reportWideningErrorsInType(type) {
-            var errorReported = false;
-            if (type.flags & 16384) {
-                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
-            }
-            if (isArrayType(type)) {
-                return reportWideningErrorsInType(type.typeArguments[0]);
-            }
-            if (isTupleType(type)) {
-                for (var _b = 0, _c = type.elementTypes; _b < _c.length; _b++) {
-                    var t = _c[_b];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
-            }
-            if (type.flags & 524288) {
-                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
-                    var p = _e[_d];
-                    var t = getTypeOfSymbol(p);
-                    if (t.flags & 2097152) {
-                        if (!reportWideningErrorsInType(t)) {
-                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
-                        }
-                        errorReported = true;
-                    }
-                }
-            }
-            return errorReported;
-        }
-        function reportImplicitAnyError(declaration, type) {
-            var typeAsString = typeToString(getWidenedType(type));
-            var diagnostic;
-            switch (declaration.kind) {
-                case 145:
-                case 144:
-                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
-                    break;
-                case 142:
-                    diagnostic = declaration.dotDotDotToken ?
-                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
-                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
-                    break;
-                case 169:
-                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
-                    break;
-                case 220:
-                case 147:
-                case 146:
-                case 149:
-                case 150:
-                case 179:
-                case 180:
-                    if (!declaration.name) {
-                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
-                        return;
-                    }
-                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
-                    break;
-                default:
-                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
-            }
-            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
-        }
-        function reportErrorsFromWidening(declaration, type) {
-            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & 2097152) {
-                if (!reportWideningErrorsInType(type)) {
-                    reportImplicitAnyError(declaration, type);
-                }
-            }
-        }
-        function forEachMatchingParameterType(source, target, callback) {
-            var sourceMax = source.parameters.length;
-            var targetMax = target.parameters.length;
-            var count;
-            if (source.hasRestParameter && target.hasRestParameter) {
-                count = Math.max(sourceMax, targetMax);
-            }
-            else if (source.hasRestParameter) {
-                count = targetMax;
-            }
-            else if (target.hasRestParameter) {
-                count = sourceMax;
-            }
-            else {
-                count = Math.min(sourceMax, targetMax);
-            }
-            for (var i = 0; i < count; i++) {
-                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
-            }
-        }
-        function createInferenceContext(typeParameters, inferUnionTypes) {
-            var inferences = ts.map(typeParameters, createTypeInferencesObject);
-            return {
-                typeParameters: typeParameters,
-                inferUnionTypes: inferUnionTypes,
-                inferences: inferences,
-                inferredTypes: new Array(typeParameters.length)
-            };
-        }
-        function createTypeInferencesObject() {
-            return {
-                primary: undefined,
-                secondary: undefined,
-                isFixed: false
-            };
-        }
-        function inferTypes(context, source, target) {
-            var sourceStack;
-            var targetStack;
-            var depth = 0;
-            var inferiority = 0;
-            var visited = {};
-            inferFromTypes(source, target);
-            function isInProcess(source, target) {
-                for (var i = 0; i < depth; i++) {
-                    if (source === sourceStack[i] && target === targetStack[i]) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function inferFromTypes(source, target) {
-                if (source.flags & 16384 && target.flags & 16384 ||
-                    source.flags & 32768 && target.flags & 32768) {
-                    var matchingTypes = void 0;
-                    for (var _i = 0, _a = target.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (typeIdenticalToSomeType(t, source.types)) {
-                            (matchingTypes || (matchingTypes = [])).push(t);
-                            inferFromTypes(t, t);
-                        }
-                    }
-                    if (matchingTypes) {
-                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
-                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
-                    }
-                }
-                if (target.flags & 512) {
-                    if (source.flags & 8388608) {
-                        return;
-                    }
-                    var typeParameters = context.typeParameters;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (target === typeParameters[i]) {
-                            var inferences = context.inferences[i];
-                            if (!inferences.isFixed) {
-                                var candidates = inferiority ?
-                                    inferences.secondary || (inferences.secondary = []) :
-                                    inferences.primary || (inferences.primary = []);
-                                if (!ts.contains(candidates, source)) {
-                                    candidates.push(source);
-                                }
-                            }
-                            return;
-                        }
-                    }
-                }
-                else if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
-                    var sourceTypes = source.typeArguments || emptyArray;
-                    var targetTypes = target.typeArguments || emptyArray;
-                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
-                    for (var i = 0; i < count; i++) {
-                        inferFromTypes(sourceTypes[i], targetTypes[i]);
-                    }
-                }
-                else if (source.flags & 8192 && target.flags & 8192 && source.elementTypes.length === target.elementTypes.length) {
-                    var sourceTypes = source.elementTypes;
-                    var targetTypes = target.elementTypes;
-                    for (var i = 0; i < sourceTypes.length; i++) {
-                        inferFromTypes(sourceTypes[i], targetTypes[i]);
-                    }
-                }
-                else if (target.flags & 49152) {
-                    var targetTypes = target.types;
-                    var typeParameterCount = 0;
-                    var typeParameter = void 0;
-                    for (var _b = 0, targetTypes_2 = targetTypes; _b < targetTypes_2.length; _b++) {
-                        var t = targetTypes_2[_b];
-                        if (t.flags & 512 && ts.contains(context.typeParameters, t)) {
-                            typeParameter = t;
-                            typeParameterCount++;
-                        }
-                        else {
-                            inferFromTypes(source, t);
-                        }
-                    }
-                    if (typeParameterCount === 1) {
-                        inferiority++;
-                        inferFromTypes(source, typeParameter);
-                        inferiority--;
-                    }
-                }
-                else if (source.flags & 49152) {
-                    var sourceTypes = source.types;
-                    for (var _c = 0, sourceTypes_3 = sourceTypes; _c < sourceTypes_3.length; _c++) {
-                        var sourceType = sourceTypes_3[_c];
-                        inferFromTypes(sourceType, target);
-                    }
-                }
-                else {
-                    source = getApparentType(source);
-                    if (source.flags & 80896 && (target.flags & 4096 && target.typeArguments ||
-                        target.flags & 8192 ||
-                        target.flags & 65536 && target.symbol && target.symbol.flags & (8192 | 2048 | 32))) {
-                        if (isInProcess(source, target)) {
-                            return;
-                        }
-                        if (isDeeplyNestedGeneric(source, sourceStack, depth) && isDeeplyNestedGeneric(target, targetStack, depth)) {
-                            return;
-                        }
-                        var key = source.id + "," + target.id;
-                        if (ts.hasProperty(visited, key)) {
-                            return;
-                        }
-                        visited[key] = true;
-                        if (depth === 0) {
-                            sourceStack = [];
-                            targetStack = [];
-                        }
-                        sourceStack[depth] = source;
-                        targetStack[depth] = target;
-                        depth++;
-                        inferFromProperties(source, target);
-                        inferFromSignatures(source, target, 0);
-                        inferFromSignatures(source, target, 1);
-                        inferFromIndexTypes(source, target);
-                        depth--;
-                    }
-                }
-            }
-            function inferFromProperties(source, target) {
-                var properties = getPropertiesOfObjectType(target);
-                for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
-                    var targetProp = properties_2[_i];
-                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
-                    if (sourceProp) {
-                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
-                    }
-                }
-            }
-            function inferFromSignatures(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                var sourceLen = sourceSignatures.length;
-                var targetLen = targetSignatures.length;
-                var len = sourceLen < targetLen ? sourceLen : targetLen;
-                for (var i = 0; i < len; i++) {
-                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
-                }
-            }
-            function inferFromSignature(source, target) {
-                forEachMatchingParameterType(source, target, inferFromTypes);
-                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
-                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
-                }
-                else {
-                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
-                }
-            }
-            function inferFromIndexTypes(source, target) {
-                var targetStringIndexType = getIndexTypeOfType(target, 0);
-                if (targetStringIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 0) ||
-                        getImplicitIndexTypeOfType(source, 0);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetStringIndexType);
-                    }
-                }
-                var targetNumberIndexType = getIndexTypeOfType(target, 1);
-                if (targetNumberIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 1) ||
-                        getIndexTypeOfType(source, 0) ||
-                        getImplicitIndexTypeOfType(source, 1);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetNumberIndexType);
-                    }
-                }
-            }
-        }
-        function typeIdenticalToSomeType(type, types) {
-            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
-                var t = types_7[_i];
-                if (isTypeIdenticalTo(t, type)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
-            var reducedTypes = [];
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (!typeIdenticalToSomeType(t, typesToRemove)) {
-                    reducedTypes.push(t);
-                }
-            }
-            return type.flags & 16384 ? getUnionType(reducedTypes, true) : getIntersectionType(reducedTypes);
-        }
-        function getInferenceCandidates(context, index) {
-            var inferences = context.inferences[index];
-            return inferences.primary || inferences.secondary || emptyArray;
-        }
-        function getInferredType(context, index) {
-            var inferredType = context.inferredTypes[index];
-            var inferenceSucceeded;
-            if (!inferredType) {
-                var inferences = getInferenceCandidates(context, index);
-                if (inferences.length) {
-                    var unionOrSuperType = context.inferUnionTypes ? getUnionType(inferences) : getCommonSupertype(inferences);
-                    inferredType = unionOrSuperType ? getWidenedType(unionOrSuperType) : unknownType;
-                    inferenceSucceeded = !!unionOrSuperType;
-                }
-                else {
-                    inferredType = emptyObjectType;
-                    inferenceSucceeded = true;
-                }
-                context.inferredTypes[index] = inferredType;
-                if (inferenceSucceeded) {
-                    var constraint = getConstraintOfTypeParameter(context.typeParameters[index]);
-                    if (constraint) {
-                        var instantiatedConstraint = instantiateType(constraint, getInferenceMapper(context));
-                        if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
-                            context.inferredTypes[index] = inferredType = instantiatedConstraint;
-                        }
-                    }
-                }
-                else if (context.failedTypeParameterIndex === undefined || context.failedTypeParameterIndex > index) {
-                    context.failedTypeParameterIndex = index;
-                }
-            }
-            return inferredType;
-        }
-        function getInferredTypes(context) {
-            for (var i = 0; i < context.inferredTypes.length; i++) {
-                getInferredType(context, i);
-            }
-            return context.inferredTypes;
-        }
-        function getResolvedSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 | 1048576, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol;
-            }
-            return links.resolvedSymbol;
-        }
-        function isInTypeQuery(node) {
-            while (node) {
-                switch (node.kind) {
-                    case 158:
-                        return true;
-                    case 69:
-                    case 139:
-                        node = node.parent;
-                        continue;
-                    default:
-                        return false;
-                }
-            }
-            ts.Debug.fail("should not get here");
-        }
-        function getFlowCacheKey(node) {
-            if (node.kind === 69) {
-                var symbol = getResolvedSymbol(node);
-                return symbol !== unknownSymbol ? "" + getSymbolId(symbol) : undefined;
-            }
-            if (node.kind === 97) {
-                return "0";
-            }
-            if (node.kind === 172) {
-                var key = getFlowCacheKey(node.expression);
-                return key && key + "." + node.name.text;
-            }
-            return undefined;
-        }
-        function isNullOrUndefinedLiteral(node) {
-            return node.kind === 93 ||
-                node.kind === 69 && getResolvedSymbol(node) === undefinedSymbol;
-        }
-        function getLeftmostIdentifierOrThis(node) {
-            switch (node.kind) {
-                case 69:
-                case 97:
-                    return node;
-                case 172:
-                    return getLeftmostIdentifierOrThis(node.expression);
-            }
-            return undefined;
-        }
-        function isMatchingReference(source, target) {
-            if (source.kind === target.kind) {
-                switch (source.kind) {
-                    case 69:
-                        return getResolvedSymbol(source) === getResolvedSymbol(target);
-                    case 97:
-                        return true;
-                    case 172:
-                        return source.name.text === target.name.text &&
-                            isMatchingReference(source.expression, target.expression);
-                }
-            }
-            return false;
-        }
-        function containsMatchingReference(source, target) {
-            while (source.kind === 172) {
-                source = source.expression;
-                if (isMatchingReference(source, target)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function isOrContainsMatchingReference(source, target) {
-            return isMatchingReference(source, target) || containsMatchingReference(source, target);
-        }
-        function hasMatchingArgument(callExpression, reference) {
-            if (callExpression.arguments) {
-                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
-                    var argument = _a[_i];
-                    if (isOrContainsMatchingReference(reference, argument)) {
-                        return true;
-                    }
-                }
-            }
-            if (callExpression.expression.kind === 172 &&
-                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
-                return true;
-            }
-            return false;
-        }
-        function getFlowNodeId(flow) {
-            if (!flow.id) {
-                flow.id = nextFlowId;
-                nextFlowId++;
-            }
-            return flow.id;
-        }
-        function typeMaybeAssignableTo(source, target) {
-            if (!(source.flags & 16384)) {
-                return isTypeAssignableTo(source, target);
-            }
-            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (isTypeAssignableTo(t, target)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function getAssignmentReducedType(declaredType, assignedType) {
-            if (declaredType !== assignedType && declaredType.flags & 16384) {
-                var reducedTypes = ts.filter(declaredType.types, function (t) { return typeMaybeAssignableTo(assignedType, t); });
-                if (reducedTypes.length) {
-                    return reducedTypes.length === 1 ? reducedTypes[0] : getUnionType(reducedTypes);
-                }
-            }
-            return declaredType;
-        }
-        function getTypeFacts(type) {
-            var flags = type.flags;
-            if (flags & 258) {
-                return strictNullChecks ? 4079361 : 4194049;
-            }
-            if (flags & 132) {
-                return strictNullChecks ? 4079234 : 4193922;
-            }
-            if (flags & 8) {
-                return strictNullChecks ? 4078980 : 4193668;
-            }
-            if (flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return resolved.callSignatures.length || resolved.constructSignatures.length || isTypeSubtypeOf(type, globalFunctionType) ?
-                    strictNullChecks ? 1970144 : 4181984 :
-                    strictNullChecks ? 1972176 : 4184016;
-            }
-            if (flags & (16 | 32)) {
-                return 2457472;
-            }
-            if (flags & 64) {
-                return 2340752;
-            }
-            if (flags & 16777216) {
-                return strictNullChecks ? 1981320 : 4193160;
-            }
-            if (flags & 512) {
-                var constraint = getConstraintOfTypeParameter(type);
-                return constraint ? getTypeFacts(constraint) : 4194303;
-            }
-            if (flags & 32768) {
-                return ts.reduceLeft(type.types, function (flags, type) { return flags |= getTypeFacts(type); }, 0);
-            }
-            return 4194303;
-        }
-        function getTypeWithFacts(type, include) {
-            if (!(type.flags & 16384)) {
-                return getTypeFacts(type) & include ? type : neverType;
-            }
-            var firstType;
-            var types;
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (getTypeFacts(t) & include) {
-                    if (!firstType) {
-                        firstType = t;
-                    }
-                    else {
-                        if (!types) {
-                            types = [firstType];
-                        }
-                        types.push(t);
-                    }
-                }
-            }
-            return firstType ? types ? getUnionType(types, true) : firstType : neverType;
-        }
-        function getTypeWithDefault(type, defaultExpression) {
-            if (defaultExpression) {
-                var defaultType = checkExpression(defaultExpression);
-                return getUnionType([getTypeWithFacts(type, 131072), defaultType]);
-            }
-            return type;
-        }
-        function getTypeOfDestructuredProperty(type, name) {
-            var text = getTextOfPropertyName(name);
-            return getTypeOfPropertyOfType(type, text) ||
-                isNumericLiteralName(text) && getIndexTypeOfType(type, 1) ||
-                getIndexTypeOfType(type, 0) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredArrayElement(type, index) {
-            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
-                checkIteratedTypeOrElementType(type, undefined, false) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredSpreadElement(type) {
-            return createArrayType(checkIteratedTypeOrElementType(type, undefined, false) || unknownType);
-        }
-        function getAssignedTypeOfBinaryExpression(node) {
-            return node.parent.kind === 170 || node.parent.kind === 253 ?
-                getTypeWithDefault(getAssignedType(node), node.right) :
-                checkExpression(node.right);
-        }
-        function getAssignedTypeOfArrayLiteralElement(node, element) {
-            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
-        }
-        function getAssignedTypeOfSpreadElement(node) {
-            return getTypeOfDestructuredSpreadElement(getAssignedType(node.parent));
-        }
-        function getAssignedTypeOfPropertyAssignment(node) {
-            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
-        }
-        function getAssignedTypeOfShorthandPropertyAssignment(node) {
-            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
-        }
-        function getAssignedType(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 207:
-                    return stringType;
-                case 208:
-                    return checkRightHandSideOfForOf(parent.expression) || unknownType;
-                case 187:
-                    return getAssignedTypeOfBinaryExpression(parent);
-                case 181:
-                    return undefinedType;
-                case 170:
-                    return getAssignedTypeOfArrayLiteralElement(parent, node);
-                case 191:
-                    return getAssignedTypeOfSpreadElement(parent);
-                case 253:
-                    return getAssignedTypeOfPropertyAssignment(parent);
-                case 254:
-                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
-            }
-            return unknownType;
-        }
-        function getInitialTypeOfBindingElement(node) {
-            var pattern = node.parent;
-            var parentType = getInitialType(pattern.parent);
-            var type = pattern.kind === 167 ?
-                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
-                !node.dotDotDotToken ?
-                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
-                    getTypeOfDestructuredSpreadElement(parentType);
-            return getTypeWithDefault(type, node.initializer);
-        }
-        function getTypeOfInitializer(node) {
-            var links = getNodeLinks(node);
-            return links.resolvedType || checkExpression(node);
-        }
-        function getInitialTypeOfVariableDeclaration(node) {
-            if (node.initializer) {
-                return getTypeOfInitializer(node.initializer);
-            }
-            if (node.parent.parent.kind === 207) {
-                return stringType;
-            }
-            if (node.parent.parent.kind === 208) {
-                return checkRightHandSideOfForOf(node.parent.parent.expression) || unknownType;
-            }
-            return unknownType;
-        }
-        function getInitialType(node) {
-            return node.kind === 218 ?
-                getInitialTypeOfVariableDeclaration(node) :
-                getInitialTypeOfBindingElement(node);
-        }
-        function getFlowTypeOfReference(reference, declaredType, assumeInitialized) {
-            var key;
-            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & 97793)) {
-                return declaredType;
-            }
-            var initialType = assumeInitialized ? declaredType : addNullableKind(declaredType, 32);
-            var visitedFlowStart = visitedFlowCount;
-            var result = getTypeAtFlowNode(reference.flowNode);
-            visitedFlowCount = visitedFlowStart;
-            if (reference.parent.kind === 196 && getTypeWithFacts(result, 524288) === neverType) {
-                return declaredType;
-            }
-            return result;
-            function getTypeAtFlowNode(flow) {
-                while (true) {
-                    if (flow.flags & 256) {
-                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
-                            if (visitedFlowNodes[i] === flow) {
-                                return visitedFlowTypes[i];
-                            }
-                        }
-                    }
-                    var type = void 0;
-                    if (flow.flags & 16) {
-                        type = getTypeAtFlowAssignment(flow);
-                        if (!type) {
-                            flow = flow.antecedent;
-                            continue;
-                        }
-                    }
-                    else if (flow.flags & 96) {
-                        type = getTypeAtFlowCondition(flow);
-                    }
-                    else if (flow.flags & 12) {
-                        if (flow.antecedents.length === 1) {
-                            flow = flow.antecedents[0];
-                            continue;
-                        }
-                        type = flow.flags & 4 ?
-                            getTypeAtFlowBranchLabel(flow) :
-                            getTypeAtFlowLoopLabel(flow);
-                    }
-                    else if (flow.flags & 1) {
-                        type = declaredType;
-                    }
-                    else {
-                        type = initialType;
-                    }
-                    if (flow.flags & 256) {
-                        visitedFlowNodes[visitedFlowCount] = flow;
-                        visitedFlowTypes[visitedFlowCount] = type;
-                        visitedFlowCount++;
-                    }
-                    return type;
-                }
-            }
-            function getTypeAtFlowAssignment(flow) {
-                var node = flow.node;
-                if ((node.kind === 218 || node.kind === 169) &&
-                    reference.kind === 69 &&
-                    getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(reference)) === getSymbolOfNode(node)) {
-                    return declaredType.flags & 16384 ?
-                        getAssignmentReducedType(declaredType, getInitialType(node)) :
-                        declaredType;
-                }
-                if (isMatchingReference(reference, node)) {
-                    return declaredType.flags & 16384 ?
-                        getAssignmentReducedType(declaredType, getAssignedType(node)) :
-                        declaredType;
-                }
-                if (containsMatchingReference(reference, node)) {
-                    return declaredType;
-                }
-                return undefined;
-            }
-            function getTypeAtFlowCondition(flow) {
-                var type = getTypeAtFlowNode(flow.antecedent);
-                if (type !== neverType) {
-                    var assumeTrue = (flow.flags & 32) !== 0;
-                    type = narrowType(type, flow.expression, assumeTrue);
-                    if (type === neverType) {
-                        type = narrowType(declaredType, flow.expression, assumeTrue);
-                    }
-                }
-                return type;
-            }
-            function getTypeAtFlowBranchLabel(flow) {
-                var antecedentTypes = [];
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    var type = getTypeAtFlowNode(antecedent);
-                    if (type === declaredType && declaredType === initialType) {
-                        return type;
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                }
-                return getUnionType(antecedentTypes);
-            }
-            function getTypeAtFlowLoopLabel(flow) {
-                var id = getFlowNodeId(flow);
-                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = {});
-                if (!key) {
-                    key = getFlowCacheKey(reference);
-                }
-                if (cache[key]) {
-                    return cache[key];
-                }
-                for (var i = flowLoopStart; i < flowLoopCount; i++) {
-                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key) {
-                        return getUnionType(flowLoopTypes[i]);
-                    }
-                }
-                var antecedentTypes = [];
-                flowLoopNodes[flowLoopCount] = flow;
-                flowLoopKeys[flowLoopCount] = key;
-                flowLoopTypes[flowLoopCount] = antecedentTypes;
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    flowLoopCount++;
-                    var type = getTypeAtFlowNode(antecedent);
-                    flowLoopCount--;
-                    if (cache[key]) {
-                        return cache[key];
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                    if (type === declaredType) {
-                        break;
-                    }
-                }
-                return cache[key] = getUnionType(antecedentTypes);
-            }
-            function narrowTypeByTruthiness(type, expr, assumeTrue) {
-                return isMatchingReference(reference, expr) ? getTypeWithFacts(type, assumeTrue ? 1048576 : 2097152) : type;
-            }
-            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
-                switch (expr.operatorToken.kind) {
-                    case 56:
-                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
-                    case 30:
-                    case 31:
-                    case 32:
-                    case 33:
-                        if (isNullOrUndefinedLiteral(expr.right)) {
-                            return narrowTypeByNullCheck(type, expr, assumeTrue);
-                        }
-                        if (expr.left.kind === 182 && expr.right.kind === 9) {
-                            return narrowTypeByTypeof(type, expr, assumeTrue);
-                        }
-                        break;
-                    case 91:
-                        return narrowTypeByInstanceof(type, expr, assumeTrue);
-                    case 24:
-                        return narrowType(type, expr.right, assumeTrue);
-                }
-                return type;
-            }
-            function narrowTypeByNullCheck(type, expr, assumeTrue) {
-                var operator = expr.operatorToken.kind;
-                if (operator === 31 || operator === 33) {
-                    assumeTrue = !assumeTrue;
-                }
-                if (!strictNullChecks || !isMatchingReference(reference, expr.left)) {
-                    return type;
-                }
-                var doubleEquals = operator === 30 || operator === 31;
-                var facts = doubleEquals ?
-                    assumeTrue ? 65536 : 524288 :
-                    expr.right.kind === 93 ?
-                        assumeTrue ? 32768 : 262144 :
-                        assumeTrue ? 16384 : 131072;
-                return getTypeWithFacts(type, facts);
-            }
-            function narrowTypeByTypeof(type, expr, assumeTrue) {
-                var left = expr.left;
-                var right = expr.right;
-                if (!isMatchingReference(reference, left.expression)) {
-                    if (containsMatchingReference(reference, left.expression)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                if (expr.operatorToken.kind === 31 ||
-                    expr.operatorToken.kind === 33) {
-                    assumeTrue = !assumeTrue;
-                }
-                if (assumeTrue && !(type.flags & 16384)) {
-                    var targetType = ts.getProperty(typeofTypesByName, right.text);
-                    if (targetType && isTypeSubtypeOf(targetType, type)) {
-                        return targetType;
-                    }
-                }
-                var facts = assumeTrue ?
-                    ts.getProperty(typeofEQFacts, right.text) || 64 :
-                    ts.getProperty(typeofNEFacts, right.text) || 8192;
-                return getTypeWithFacts(type, facts);
-            }
-            function narrowTypeByInstanceof(type, expr, assumeTrue) {
-                if (!isMatchingReference(reference, expr.left)) {
-                    if (containsMatchingReference(reference, expr.left)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                if (isTypeAny(type)) {
-                    return type;
-                }
-                var rightType = checkExpression(expr.right);
-                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
-                    return type;
-                }
-                var targetType;
-                var prototypeProperty = getPropertyOfType(rightType, "prototype");
-                if (prototypeProperty) {
-                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
-                    if (!isTypeAny(prototypePropertyType)) {
-                        targetType = prototypePropertyType;
-                    }
-                }
-                if (!targetType) {
-                    var constructSignatures = void 0;
-                    if (rightType.flags & 2048) {
-                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
-                    }
-                    else if (rightType.flags & 65536) {
-                        constructSignatures = getSignaturesOfType(rightType, 1);
-                    }
-                    if (constructSignatures && constructSignatures.length) {
-                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
-                    }
-                }
-                if (targetType) {
-                    return getNarrowedType(type, targetType, assumeTrue);
-                }
-                return type;
-            }
-            function getNarrowedType(type, candidate, assumeTrue) {
-                if (!assumeTrue) {
-                    return type.flags & 16384 ?
-                        getUnionType(ts.filter(type.types, function (t) { return !isTypeSubtypeOf(t, candidate); })) :
-                        type;
-                }
-                if (type.flags & 16384) {
-                    var assignableConstituents = ts.filter(type.types, function (t) { return isTypeAssignableTo(t, candidate); });
-                    if (assignableConstituents.length) {
-                        return getUnionType(assignableConstituents);
-                    }
-                }
-                var targetType = type.flags & 512 ? getApparentType(type) : type;
-                return isTypeAssignableTo(candidate, targetType) ? candidate :
-                    isTypeAssignableTo(type, candidate) ? type :
-                        neverType;
-            }
-            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
-                if (type.flags & 1 || !hasMatchingArgument(callExpression, reference)) {
-                    return type;
-                }
-                var signature = getResolvedSignature(callExpression);
-                var predicate = signature.typePredicate;
-                if (!predicate) {
-                    return type;
-                }
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    var predicateArgument = callExpression.arguments[predicate.parameterIndex];
-                    if (predicateArgument) {
-                        if (isMatchingReference(reference, predicateArgument)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, predicateArgument)) {
-                            return declaredType;
-                        }
-                    }
-                }
-                else {
-                    var invokedExpression = skipParenthesizedNodes(callExpression.expression);
-                    if (invokedExpression.kind === 173 || invokedExpression.kind === 172) {
-                        var accessExpression = invokedExpression;
-                        var possibleReference = skipParenthesizedNodes(accessExpression.expression);
-                        if (isMatchingReference(reference, possibleReference)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, possibleReference)) {
-                            return declaredType;
-                        }
-                    }
-                }
-                return type;
-            }
-            function narrowType(type, expr, assumeTrue) {
-                switch (expr.kind) {
-                    case 69:
-                    case 97:
-                    case 172:
-                        return narrowTypeByTruthiness(type, expr, assumeTrue);
-                    case 174:
-                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
-                    case 178:
-                        return narrowType(type, expr.expression, assumeTrue);
-                    case 187:
-                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
-                    case 185:
-                        if (expr.operator === 49) {
-                            return narrowType(type, expr.operand, !assumeTrue);
-                        }
-                        break;
-                }
-                return type;
-            }
-        }
-        function getTypeOfSymbolAtLocation(symbol, location) {
-            if (location.kind === 69) {
-                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
-                    location = location.parent;
-                }
-                if (ts.isExpression(location) && !ts.isAssignmentTarget(location)) {
-                    var type = checkExpression(location);
-                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
-                        return type;
-                    }
-                }
-            }
-            return getTypeOfSymbol(symbol);
-        }
-        function skipParenthesizedNodes(expression) {
-            while (expression.kind === 178) {
-                expression = expression.expression;
-            }
-            return expression;
-        }
-        function checkIdentifier(node) {
-            var symbol = getResolvedSymbol(node);
-            if (symbol === argumentsSymbol) {
-                var container = ts.getContainingFunction(node);
-                if (container.kind === 180) {
-                    if (languageVersion < 2) {
-                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
-                    }
-                }
-                if (node.flags & 33554432) {
-                    getNodeLinks(container).flags |= 8192;
-                }
-            }
-            if (symbol.flags & 8388608 && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
-                markAliasSymbolAsReferenced(symbol);
-            }
-            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
-            if (languageVersion === 2
-                && localOrExportSymbol.flags & 32
-                && localOrExportSymbol.valueDeclaration.kind === 221
-                && ts.nodeIsDecorated(localOrExportSymbol.valueDeclaration)) {
-                var container = ts.getContainingClass(node);
-                while (container !== undefined) {
-                    if (container === localOrExportSymbol.valueDeclaration && container.name !== node) {
-                        getNodeLinks(container).flags |= 524288;
-                        getNodeLinks(node).flags |= 1048576;
-                        break;
-                    }
-                    container = ts.getContainingClass(container);
-                }
-            }
-            checkCollisionWithCapturedSuperVariable(node, node);
-            checkCollisionWithCapturedThisVariable(node, node);
-            checkNestedBlockScopedBinding(node, symbol);
-            var type = getTypeOfSymbol(localOrExportSymbol);
-            if (!(localOrExportSymbol.flags & 3) || ts.isAssignmentTarget(node)) {
-                return type;
-            }
-            var declaration = localOrExportSymbol.valueDeclaration;
-            var assumeInitialized = !strictNullChecks || (type.flags & 1) !== 0 || !declaration ||
-                ts.getRootDeclaration(declaration).kind === 142 || ts.isInAmbientContext(declaration) ||
-                ts.getContainingFunctionOrModule(declaration) !== ts.getContainingFunctionOrModule(node);
-            var flowType = getFlowTypeOfReference(node, type, assumeInitialized);
-            if (!assumeInitialized && !(getNullableKind(type) & 32) && getNullableKind(flowType) & 32) {
-                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
-                return type;
-            }
-            return flowType;
-        }
-        function isInsideFunction(node, threshold) {
-            var current = node;
-            while (current && current !== threshold) {
-                if (ts.isFunctionLike(current)) {
-                    return true;
-                }
-                current = current.parent;
-            }
-            return false;
-        }
-        function checkNestedBlockScopedBinding(node, symbol) {
-            if (languageVersion >= 2 ||
-                (symbol.flags & (2 | 32)) === 0 ||
-                symbol.valueDeclaration.parent.kind === 252) {
-                return;
-            }
-            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-            var usedInFunction = isInsideFunction(node.parent, container);
-            var current = container;
-            var containedInIterationStatement = false;
-            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
-                if (ts.isIterationStatement(current, false)) {
-                    containedInIterationStatement = true;
-                    break;
-                }
-                current = current.parent;
-            }
-            if (containedInIterationStatement) {
-                if (usedInFunction) {
-                    getNodeLinks(current).flags |= 65536;
-                }
-                if (container.kind === 206 &&
-                    ts.getAncestor(symbol.valueDeclaration, 219).parent === container &&
-                    isAssignedInBodyOfForStatement(node, container)) {
-                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152;
-                }
-                getNodeLinks(symbol.valueDeclaration).flags |= 262144;
-            }
-            if (usedInFunction) {
-                getNodeLinks(symbol.valueDeclaration).flags |= 131072;
-            }
-        }
-        function isAssignedInBodyOfForStatement(node, container) {
-            var current = node;
-            while (current.parent.kind === 178) {
-                current = current.parent;
-            }
-            var isAssigned = false;
-            if (ts.isAssignmentTarget(current)) {
-                isAssigned = true;
-            }
-            else if ((current.parent.kind === 185 || current.parent.kind === 186)) {
-                var expr = current.parent;
-                isAssigned = expr.operator === 41 || expr.operator === 42;
-            }
-            if (!isAssigned) {
-                return false;
-            }
-            while (current !== container) {
-                if (current === container.statement) {
-                    return true;
-                }
-                else {
-                    current = current.parent;
-                }
-            }
-            return false;
-        }
-        function captureLexicalThis(node, container) {
-            getNodeLinks(node).flags |= 2;
-            if (container.kind === 145 || container.kind === 148) {
-                var classNode = container.parent;
-                getNodeLinks(classNode).flags |= 4;
-            }
-            else {
-                getNodeLinks(container).flags |= 4;
-            }
-        }
-        function findFirstSuperCall(n) {
-            if (ts.isSuperCallExpression(n)) {
-                return n;
-            }
-            else if (ts.isFunctionLike(n)) {
-                return undefined;
-            }
-            return ts.forEachChild(n, findFirstSuperCall);
-        }
-        function getSuperCallInConstructor(constructor) {
-            var links = getNodeLinks(constructor);
-            if (links.hasSuperCall === undefined) {
-                links.superCall = findFirstSuperCall(constructor.body);
-                links.hasSuperCall = links.superCall ? true : false;
-            }
-            return links.superCall;
-        }
-        function classDeclarationExtendsNull(classDecl) {
-            var classSymbol = getSymbolOfNode(classDecl);
-            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
-            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
-            return baseConstructorType === nullType;
-        }
-        function checkThisExpression(node) {
-            var container = ts.getThisContainer(node, true);
-            var needToCaptureLexicalThis = false;
-            if (container.kind === 148) {
-                var containingClassDecl = container.parent;
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
-                if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
-                    var superCall = getSuperCallInConstructor(container);
-                    if (!superCall || superCall.end > node.pos) {
-                        error(node, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
-                    }
-                }
-            }
-            if (container.kind === 180) {
-                container = ts.getThisContainer(container, false);
-                needToCaptureLexicalThis = (languageVersion < 2);
-            }
-            switch (container.kind) {
-                case 225:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
-                    break;
-                case 224:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
-                    break;
-                case 148:
-                    if (isInConstructorArgumentInitializer(node, container)) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
-                    }
-                    break;
-                case 145:
-                case 144:
-                    if (container.flags & 32) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
-                    }
-                    break;
-                case 140:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
-                    break;
-            }
-            if (needToCaptureLexicalThis) {
-                captureLexicalThis(node, container);
-            }
-            if (ts.isFunctionLike(container)) {
-                if (container.kind === 179 &&
-                    ts.isInJavaScriptFile(container.parent) &&
-                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3) {
-                    var className = container.parent
-                        .left
-                        .expression
-                        .expression;
-                    var classSymbol = checkExpression(className).symbol;
-                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16)) {
-                        return getInferredClassType(classSymbol);
-                    }
-                }
-                var type = getContextuallyTypedThisType(container);
-                if (type) {
-                    return type;
-                }
-                var signature = getSignatureFromDeclaration(container);
-                if (signature.thisType) {
-                    return signature.thisType;
-                }
-            }
-            if (ts.isClassLike(container.parent)) {
-                var symbol = getSymbolOfNode(container.parent);
-                var type = container.flags & 32 ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
-                return getFlowTypeOfReference(node, type, true);
-            }
-            if (ts.isInJavaScriptFile(node)) {
-                var type = getTypeForThisExpressionFromJSDoc(container);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            if (compilerOptions.noImplicitThis) {
-                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
-            }
-            return anyType;
-        }
-        function getTypeForThisExpressionFromJSDoc(node) {
-            var typeTag = ts.getJSDocTypeTag(node);
-            if (typeTag && typeTag.typeExpression && typeTag.typeExpression.type && typeTag.typeExpression.type.kind === 269) {
-                var jsDocFunctionType = typeTag.typeExpression.type;
-                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 272) {
-                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
-                }
-            }
-        }
-        function isInConstructorArgumentInitializer(node, constructorDecl) {
-            for (var n = node; n && n !== constructorDecl; n = n.parent) {
-                if (n.kind === 142) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function checkSuperExpression(node) {
-            var isCallExpression = node.parent.kind === 174 && node.parent.expression === node;
-            var container = ts.getSuperContainer(node, true);
-            var needToCaptureLexicalThis = false;
-            if (!isCallExpression) {
-                while (container && container.kind === 180) {
-                    container = ts.getSuperContainer(container, true);
-                    needToCaptureLexicalThis = languageVersion < 2;
-                }
-            }
-            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
-            var nodeCheckFlag = 0;
-            if (!canUseSuperExpression) {
-                var current = node;
-                while (current && current !== container && current.kind !== 140) {
-                    current = current.parent;
-                }
-                if (current && current.kind === 140) {
-                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
-                }
-                else if (isCallExpression) {
-                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
-                }
-                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 171)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
-                }
-                else {
-                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
-                }
-                return unknownType;
-            }
-            if ((container.flags & 32) || isCallExpression) {
-                nodeCheckFlag = 512;
-            }
-            else {
-                nodeCheckFlag = 256;
-            }
-            getNodeLinks(node).flags |= nodeCheckFlag;
-            if (container.kind === 147 && container.flags & 256) {
-                if (ts.isSuperPropertyOrElementAccess(node.parent) && ts.isAssignmentTarget(node.parent)) {
-                    getNodeLinks(container).flags |= 4096;
-                }
-                else {
-                    getNodeLinks(container).flags |= 2048;
-                }
-            }
-            if (needToCaptureLexicalThis) {
-                captureLexicalThis(node.parent, container);
-            }
-            if (container.parent.kind === 171) {
-                if (languageVersion < 2) {
-                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
-                    return unknownType;
-                }
-                else {
-                    return anyType;
-                }
-            }
-            var classLikeDeclaration = container.parent;
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
-            var baseClassType = classType && getBaseTypes(classType)[0];
-            if (!baseClassType) {
-                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
-                }
-                return unknownType;
-            }
-            if (container.kind === 148 && isInConstructorArgumentInitializer(node, container)) {
-                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
-                return unknownType;
-            }
-            return nodeCheckFlag === 512
-                ? getBaseConstructorTypeOfClass(classType)
-                : getTypeWithThisArgument(baseClassType, classType.thisType);
-            function isLegalUsageOfSuperExpression(container) {
-                if (!container) {
-                    return false;
-                }
-                if (isCallExpression) {
-                    return container.kind === 148;
-                }
-                else {
-                    if (ts.isClassLike(container.parent) || container.parent.kind === 171) {
-                        if (container.flags & 32) {
-                            return container.kind === 147 ||
-                                container.kind === 146 ||
-                                container.kind === 149 ||
-                                container.kind === 150;
-                        }
-                        else {
-                            return container.kind === 147 ||
-                                container.kind === 146 ||
-                                container.kind === 149 ||
-                                container.kind === 150 ||
-                                container.kind === 145 ||
-                                container.kind === 144 ||
-                                container.kind === 148;
-                        }
-                    }
-                }
-                return false;
-            }
-        }
-        function getContextuallyTypedThisType(func) {
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func) && func.kind !== 180) {
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    return contextualSignature.thisType;
-                }
-            }
-            return undefined;
-        }
-        function getContextuallyTypedParameterType(parameter) {
-            var func = parameter.parent;
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
-                var iife = getImmediatelyInvokedFunctionExpression(func);
-                if (iife) {
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
-                        if (parameter.dotDotDotToken) {
-                            var restTypes = [];
-                            for (var i = indexOfParameter; i < iife.arguments.length; i++) {
-                                restTypes.push(getTypeOfExpression(iife.arguments[i]));
-                            }
-                            return createArrayType(getUnionType(restTypes));
-                        }
-                        var links = getNodeLinks(iife);
-                        var cached = links.resolvedSignature;
-                        links.resolvedSignature = anySignature;
-                        var type = checkExpression(iife.arguments[indexOfParameter]);
-                        links.resolvedSignature = cached;
-                        return type;
-                    }
-                }
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    var funcHasRestParameters = ts.hasRestParameter(func);
-                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (indexOfParameter < len) {
-                        return getTypeAtPosition(contextualSignature, indexOfParameter);
-                    }
-                    if (funcHasRestParameters &&
-                        indexOfParameter === (func.parameters.length - 1) &&
-                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
-                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
-                    }
-                }
-            }
-            return undefined;
-        }
-        function getImmediatelyInvokedFunctionExpression(func) {
-            if (isFunctionExpressionOrArrowFunction(func)) {
-                var prev = func;
-                var parent_8 = func.parent;
-                while (parent_8.kind === 178) {
-                    prev = parent_8;
-                    parent_8 = parent_8.parent;
-                }
-                if (parent_8.kind === 174 && parent_8.expression === prev) {
-                    return parent_8;
-                }
-            }
-        }
-        function getContextualTypeForInitializerExpression(node) {
-            var declaration = node.parent;
-            if (node === declaration.initializer) {
-                if (declaration.type) {
-                    return getTypeFromTypeNode(declaration.type);
-                }
-                if (declaration.kind === 142) {
-                    var type = getContextuallyTypedParameterType(declaration);
-                    if (type) {
-                        return type;
-                    }
-                }
-                if (ts.isBindingPattern(declaration.name)) {
-                    return getTypeFromBindingPattern(declaration.name, true);
-                }
-                if (ts.isBindingPattern(declaration.parent)) {
-                    var parentDeclaration = declaration.parent.parent;
-                    var name_11 = declaration.propertyName || declaration.name;
-                    if (ts.isVariableLike(parentDeclaration) &&
-                        parentDeclaration.type &&
-                        !ts.isBindingPattern(name_11)) {
-                        var text = getTextOfPropertyName(name_11);
-                        if (text) {
-                            return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text);
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function getContextualTypeForReturnExpression(node) {
-            var func = ts.getContainingFunction(node);
-            if (func && !func.asteriskToken) {
-                return getContextualReturnType(func);
-            }
-            return undefined;
-        }
-        function getContextualTypeForYieldOperand(node) {
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var contextualReturnType = getContextualReturnType(func);
-                if (contextualReturnType) {
-                    return node.asteriskToken
-                        ? contextualReturnType
-                        : getElementTypeOfIterableIterator(contextualReturnType);
-                }
-            }
-            return undefined;
-        }
-        function isInParameterInitializerBeforeContainingFunction(node) {
-            while (node.parent && !ts.isFunctionLike(node.parent)) {
-                if (node.parent.kind === 142 && node.parent.initializer === node) {
-                    return true;
-                }
-                node = node.parent;
-            }
-            return false;
-        }
-        function getContextualReturnType(functionDecl) {
-            if (functionDecl.type ||
-                functionDecl.kind === 148 ||
-                functionDecl.kind === 149 && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(functionDecl.symbol, 150))) {
-                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
-            }
-            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
-            if (signature) {
-                return getReturnTypeOfSignature(signature);
-            }
-            return undefined;
-        }
-        function getContextualTypeForArgument(callTarget, arg) {
-            var args = getEffectiveCallArguments(callTarget);
-            var argIndex = ts.indexOf(args, arg);
-            if (argIndex >= 0) {
-                var signature = getResolvedOrAnySignature(callTarget);
-                return getTypeAtPosition(signature, argIndex);
-            }
-            return undefined;
-        }
-        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
-            if (template.parent.kind === 176) {
-                return getContextualTypeForArgument(template.parent, substitutionExpression);
-            }
-            return undefined;
-        }
-        function getContextualTypeForBinaryOperand(node) {
-            var binaryExpression = node.parent;
-            var operator = binaryExpression.operatorToken.kind;
-            if (operator >= 56 && operator <= 68) {
-                if (node === binaryExpression.right) {
-                    return checkExpression(binaryExpression.left);
-                }
-            }
-            else if (operator === 52) {
-                var type = getContextualType(binaryExpression);
-                if (!type && node === binaryExpression.right) {
-                    type = checkExpression(binaryExpression.left);
-                }
-                return type;
-            }
-            else if (operator === 51 || operator === 24) {
-                if (node === binaryExpression.right) {
-                    return getContextualType(binaryExpression);
-                }
-            }
-            return undefined;
-        }
-        function applyToContextualType(type, mapper) {
-            if (!(type.flags & 16384)) {
-                return mapper(type);
-            }
-            var types = type.types;
-            var mappedType;
-            var mappedTypes;
-            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
-                var current = types_8[_i];
-                var t = mapper(current);
-                if (t) {
-                    if (!mappedType) {
-                        mappedType = t;
-                    }
-                    else if (!mappedTypes) {
-                        mappedTypes = [mappedType, t];
-                    }
-                    else {
-                        mappedTypes.push(t);
-                    }
-                }
-            }
-            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
-        }
-        function getTypeOfPropertyOfContextualType(type, name) {
-            return applyToContextualType(type, function (t) {
-                var prop = t.flags & 130048 ? getPropertyOfType(t, name) : undefined;
-                return prop ? getTypeOfSymbol(prop) : undefined;
-            });
-        }
-        function getIndexTypeOfContextualType(type, kind) {
-            return applyToContextualType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
-        }
-        function contextualTypeIsStringLiteralType(type) {
-            return !!(type.flags & 16384 ? ts.forEach(type.types, isStringLiteralType) : isStringLiteralType(type));
-        }
-        function contextualTypeIsTupleLikeType(type) {
-            return !!(type.flags & 16384 ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
-        }
-        function getContextualTypeForObjectLiteralMethod(node) {
-            ts.Debug.assert(ts.isObjectLiteralMethod(node));
-            if (isInsideWithStatementBody(node)) {
-                return undefined;
-            }
-            return getContextualTypeForObjectLiteralElement(node);
-        }
-        function getContextualTypeForObjectLiteralElement(element) {
-            var objectLiteral = element.parent;
-            var type = getApparentTypeOfContextualType(objectLiteral);
-            if (type) {
-                if (!ts.hasDynamicName(element)) {
-                    var symbolName = getSymbolOfNode(element).name;
-                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
-                    if (propertyType) {
-                        return propertyType;
-                    }
-                }
-                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1) ||
-                    getIndexTypeOfContextualType(type, 0);
-            }
-            return undefined;
-        }
-        function getContextualTypeForElementExpression(node) {
-            var arrayLiteral = node.parent;
-            var type = getApparentTypeOfContextualType(arrayLiteral);
-            if (type) {
-                var index = ts.indexOf(arrayLiteral.elements, node);
-                return getTypeOfPropertyOfContextualType(type, "" + index)
-                    || getIndexTypeOfContextualType(type, 1)
-                    || (languageVersion >= 2 ? getElementTypeOfIterable(type, undefined) : undefined);
-            }
-            return undefined;
-        }
-        function getContextualTypeForConditionalOperand(node) {
-            var conditional = node.parent;
-            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
-        }
-        function getContextualTypeForJsxAttribute(attribute) {
-            var kind = attribute.kind;
-            var jsxElement = attribute.parent;
-            var attrsType = getJsxElementAttributesType(jsxElement);
-            if (attribute.kind === 246) {
-                if (!attrsType || isTypeAny(attrsType)) {
-                    return undefined;
-                }
-                return getTypeOfPropertyOfType(attrsType, attribute.name.text);
-            }
-            else if (attribute.kind === 247) {
-                return attrsType;
-            }
-            ts.Debug.fail("Expected JsxAttribute or JsxSpreadAttribute, got ts.SyntaxKind[" + kind + "]");
-        }
-        function getApparentTypeOfContextualType(node) {
-            var type = getContextualType(node);
-            return type && getApparentType(type);
-        }
-        function getContextualType(node) {
-            if (isInsideWithStatementBody(node)) {
-                return undefined;
-            }
-            if (node.contextualType) {
-                return node.contextualType;
-            }
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 218:
-                case 142:
-                case 145:
-                case 144:
-                case 169:
-                    return getContextualTypeForInitializerExpression(node);
-                case 180:
-                case 211:
-                    return getContextualTypeForReturnExpression(node);
-                case 190:
-                    return getContextualTypeForYieldOperand(parent);
-                case 174:
-                case 175:
-                    return getContextualTypeForArgument(parent, node);
-                case 177:
-                case 195:
-                    return getTypeFromTypeNode(parent.type);
-                case 187:
-                    return getContextualTypeForBinaryOperand(node);
-                case 253:
-                    return getContextualTypeForObjectLiteralElement(parent);
-                case 170:
-                    return getContextualTypeForElementExpression(node);
-                case 188:
-                    return getContextualTypeForConditionalOperand(node);
-                case 197:
-                    ts.Debug.assert(parent.parent.kind === 189);
-                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
-                case 178:
-                    return getContextualType(parent);
-                case 248:
-                    return getContextualType(parent);
-                case 246:
-                case 247:
-                    return getContextualTypeForJsxAttribute(parent);
-            }
-            return undefined;
-        }
-        function getNonGenericSignature(type) {
-            var signatures = getSignaturesOfStructuredType(type, 0);
-            if (signatures.length === 1) {
-                var signature = signatures[0];
-                if (!signature.typeParameters) {
-                    return signature;
-                }
-            }
-        }
-        function isFunctionExpressionOrArrowFunction(node) {
-            return node.kind === 179 || node.kind === 180;
-        }
-        function getContextualSignatureForFunctionLikeDeclaration(node) {
-            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
-                ? getContextualSignature(node)
-                : undefined;
-        }
-        function getContextualTypeForFunctionLikeDeclaration(node) {
-            return ts.isObjectLiteralMethod(node) ?
-                getContextualTypeForObjectLiteralMethod(node) :
-                getApparentTypeOfContextualType(node);
-        }
-        function getContextualSignature(node) {
-            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
-            var type = getContextualTypeForFunctionLikeDeclaration(node);
-            if (!type) {
-                return undefined;
-            }
-            if (!(type.flags & 16384)) {
-                return getNonGenericSignature(type);
-            }
-            var signatureList;
-            var types = type.types;
-            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
-                var current = types_9[_i];
-                var signature = getNonGenericSignature(current);
-                if (signature) {
-                    if (!signatureList) {
-                        signatureList = [signature];
-                    }
-                    else if (!compareSignaturesIdentical(signatureList[0], signature, false, true, true, compareTypesIdentical)) {
-                        return undefined;
-                    }
-                    else {
-                        signatureList.push(signature);
-                    }
-                }
-            }
-            var result;
-            if (signatureList) {
-                result = cloneSignature(signatureList[0]);
-                result.resolvedReturnType = undefined;
-                result.unionSignatures = signatureList;
-            }
-            return result;
-        }
-        function isInferentialContext(mapper) {
-            return mapper && mapper.context;
-        }
-        function checkSpreadElementExpression(node, contextualMapper) {
-            var arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
-            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, false);
-        }
-        function hasDefaultValue(node) {
-            return (node.kind === 169 && !!node.initializer) ||
-                (node.kind === 187 && node.operatorToken.kind === 56);
-        }
-        function checkArrayLiteral(node, contextualMapper) {
-            var elements = node.elements;
-            var hasSpreadElement = false;
-            var elementTypes = [];
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
-            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
-                var e = elements_1[_i];
-                if (inDestructuringPattern && e.kind === 191) {
-                    var restArrayType = checkExpression(e.expression, contextualMapper);
-                    var restElementType = getIndexTypeOfType(restArrayType, 1) ||
-                        (languageVersion >= 2 ? getElementTypeOfIterable(restArrayType, undefined) : undefined);
-                    if (restElementType) {
-                        elementTypes.push(restElementType);
-                    }
-                }
-                else {
-                    var type = checkExpression(e, contextualMapper);
-                    elementTypes.push(type);
-                }
-                hasSpreadElement = hasSpreadElement || e.kind === 191;
-            }
-            if (!hasSpreadElement) {
-                if (inDestructuringPattern && elementTypes.length) {
-                    var type = createNewTupleType(elementTypes);
-                    type.pattern = node;
-                    return type;
-                }
-                var contextualType = getApparentTypeOfContextualType(node);
-                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
-                    var pattern = contextualType.pattern;
-                    if (pattern && (pattern.kind === 168 || pattern.kind === 170)) {
-                        var patternElements = pattern.elements;
-                        for (var i = elementTypes.length; i < patternElements.length; i++) {
-                            var patternElement = patternElements[i];
-                            if (hasDefaultValue(patternElement)) {
-                                elementTypes.push(contextualType.elementTypes[i]);
-                            }
-                            else {
-                                if (patternElement.kind !== 193) {
-                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
-                                }
-                                elementTypes.push(unknownType);
-                            }
-                        }
-                    }
-                    if (elementTypes.length) {
-                        return createTupleType(elementTypes);
-                    }
-                }
-            }
-            return createArrayType(elementTypes.length ? getUnionType(elementTypes) : emptyArrayElementType);
-        }
-        function isNumericName(name) {
-            return name.kind === 140 ? isNumericComputedName(name) : isNumericLiteralName(name.text);
-        }
-        function isNumericComputedName(name) {
-            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 132);
-        }
-        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
-            return isTypeAny(type) || isTypeOfKind(type, kind);
-        }
-        function isNumericLiteralName(name) {
-            return (+name).toString() === name;
-        }
-        function checkComputedPropertyName(node) {
-            var links = getNodeLinks(node.expression);
-            if (!links.resolvedType) {
-                links.resolvedType = checkExpression(node.expression);
-                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 132 | 258 | 16777216)) {
-                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
-                }
-                else {
-                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, true);
-                }
-            }
-            return links.resolvedType;
-        }
-        function getObjectLiteralIndexInfo(node, properties, kind) {
-            var propTypes = [];
-            for (var i = 0; i < properties.length; i++) {
-                if (kind === 0 || isNumericName(node.properties[i].name)) {
-                    propTypes.push(getTypeOfSymbol(properties[i]));
-                }
-            }
-            var unionType = propTypes.length ? getUnionType(propTypes) : undefinedType;
-            return createIndexInfo(unionType, false);
-        }
-        function checkObjectLiteral(node, contextualMapper) {
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
-            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
-            var propertiesTable = {};
-            var propertiesArray = [];
-            var contextualType = getApparentTypeOfContextualType(node);
-            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
-                (contextualType.pattern.kind === 167 || contextualType.pattern.kind === 171);
-            var typeFlags = 0;
-            var patternWithComputedProperties = false;
-            var hasComputedStringProperty = false;
-            var hasComputedNumberProperty = false;
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var memberDecl = _a[_i];
-                var member = memberDecl.symbol;
-                if (memberDecl.kind === 253 ||
-                    memberDecl.kind === 254 ||
-                    ts.isObjectLiteralMethod(memberDecl)) {
-                    var type = void 0;
-                    if (memberDecl.kind === 253) {
-                        type = checkPropertyAssignment(memberDecl, contextualMapper);
-                    }
-                    else if (memberDecl.kind === 147) {
-                        type = checkObjectLiteralMethod(memberDecl, contextualMapper);
-                    }
-                    else {
-                        ts.Debug.assert(memberDecl.kind === 254);
-                        type = checkExpression(memberDecl.name, contextualMapper);
-                    }
-                    typeFlags |= type.flags;
-                    var prop = createSymbol(4 | 67108864 | member.flags, member.name);
-                    if (inDestructuringPattern) {
-                        var isOptional = (memberDecl.kind === 253 && hasDefaultValue(memberDecl.initializer)) ||
-                            (memberDecl.kind === 254 && memberDecl.objectAssignmentInitializer);
-                        if (isOptional) {
-                            prop.flags |= 536870912;
-                        }
-                        if (ts.hasDynamicName(memberDecl)) {
-                            patternWithComputedProperties = true;
-                        }
-                    }
-                    else if (contextualTypeHasPattern && !(contextualType.flags & 67108864)) {
-                        var impliedProp = getPropertyOfType(contextualType, member.name);
-                        if (impliedProp) {
-                            prop.flags |= impliedProp.flags & 536870912;
-                        }
-                        else if (!compilerOptions.suppressExcessPropertyErrors) {
-                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
-                        }
-                    }
-                    prop.declarations = member.declarations;
-                    prop.parent = member.parent;
-                    if (member.valueDeclaration) {
-                        prop.valueDeclaration = member.valueDeclaration;
-                    }
-                    prop.type = type;
-                    prop.target = member;
-                    member = prop;
-                }
-                else {
-                    ts.Debug.assert(memberDecl.kind === 149 || memberDecl.kind === 150);
-                    checkAccessorDeclaration(memberDecl);
-                }
-                if (ts.hasDynamicName(memberDecl)) {
-                    if (isNumericName(memberDecl.name)) {
-                        hasComputedNumberProperty = true;
-                    }
-                    else {
-                        hasComputedStringProperty = true;
-                    }
-                }
-                else {
-                    propertiesTable[member.name] = member;
-                }
-                propertiesArray.push(member);
-            }
-            if (contextualTypeHasPattern) {
-                for (var _b = 0, _c = getPropertiesOfType(contextualType); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    if (!ts.hasProperty(propertiesTable, prop.name)) {
-                        if (!(prop.flags & 536870912)) {
-                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
-                        }
-                        propertiesTable[prop.name] = prop;
-                        propertiesArray.push(prop);
-                    }
-                }
-            }
-            var stringIndexInfo = hasComputedStringProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 0) : undefined;
-            var numberIndexInfo = hasComputedNumberProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 1) : undefined;
-            var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
-            var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576;
-            result.flags |= 524288 | 4194304 | freshObjectLiteralFlag | (typeFlags & 14680064) | (patternWithComputedProperties ? 67108864 : 0);
-            if (inDestructuringPattern) {
-                result.pattern = node;
-            }
-            return result;
-        }
-        function checkJsxSelfClosingElement(node) {
-            checkJsxOpeningLikeElement(node);
-            return jsxElementType || anyType;
-        }
-        function checkJsxElement(node) {
-            checkJsxOpeningLikeElement(node.openingElement);
-            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
-                getIntrinsicTagSymbol(node.closingElement);
-            }
-            else {
-                checkExpression(node.closingElement.tagName);
-            }
-            for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
-                var child = _a[_i];
-                switch (child.kind) {
-                    case 248:
-                        checkJsxExpression(child);
-                        break;
-                    case 241:
-                        checkJsxElement(child);
-                        break;
-                    case 242:
-                        checkJsxSelfClosingElement(child);
-                        break;
-                }
-            }
-            return jsxElementType || anyType;
-        }
-        function isUnhyphenatedJsxName(name) {
-            return name.indexOf("-") < 0;
-        }
-        function isJsxIntrinsicIdentifier(tagName) {
-            if (tagName.kind === 139) {
-                return false;
-            }
-            else {
-                return ts.isIntrinsicJsxName(tagName.text);
-            }
-        }
-        function checkJsxAttribute(node, elementAttributesType, nameTable) {
-            var correspondingPropType = undefined;
-            if (elementAttributesType === emptyObjectType && isUnhyphenatedJsxName(node.name.text)) {
-                error(node.parent, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
-            }
-            else if (elementAttributesType && !isTypeAny(elementAttributesType)) {
-                var correspondingPropSymbol = getPropertyOfType(elementAttributesType, node.name.text);
-                correspondingPropType = correspondingPropSymbol && getTypeOfSymbol(correspondingPropSymbol);
-                if (isUnhyphenatedJsxName(node.name.text)) {
-                    var indexerType = getIndexTypeOfType(elementAttributesType, 0);
-                    if (indexerType) {
-                        correspondingPropType = indexerType;
-                    }
-                    else {
-                        if (!correspondingPropType) {
-                            error(node.name, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.name.text, typeToString(elementAttributesType));
-                            return unknownType;
-                        }
-                    }
-                }
-            }
-            var exprType;
-            if (node.initializer) {
-                exprType = checkExpression(node.initializer);
-            }
-            else {
-                exprType = booleanType;
-            }
-            if (correspondingPropType) {
-                checkTypeAssignableTo(exprType, correspondingPropType, node);
-            }
-            nameTable[node.name.text] = true;
-            return exprType;
-        }
-        function checkJsxSpreadAttribute(node, elementAttributesType, nameTable) {
-            var type = checkExpression(node.expression);
-            var props = getPropertiesOfType(type);
-            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
-                var prop = props_2[_i];
-                if (!nameTable[prop.name]) {
-                    var targetPropSym = getPropertyOfType(elementAttributesType, prop.name);
-                    if (targetPropSym) {
-                        var msg = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property, prop.name);
-                        checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(targetPropSym), node, undefined, msg);
-                    }
-                    nameTable[prop.name] = true;
-                }
-            }
-            return type;
-        }
-        function getJsxType(name) {
-            if (jsxTypes[name] === undefined) {
-                return jsxTypes[name] = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType;
-            }
-            return jsxTypes[name];
-        }
-        function getIntrinsicTagSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
-                if (intrinsicElementsType !== unknownType) {
-                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
-                    if (intrinsicProp) {
-                        links.jsxFlags |= 1;
-                        return links.resolvedSymbol = intrinsicProp;
-                    }
-                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0);
-                    if (indexSignatureType) {
-                        links.jsxFlags |= 2;
-                        return links.resolvedSymbol = intrinsicElementsType.symbol;
-                    }
-                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
-                    return links.resolvedSymbol = unknownSymbol;
-                }
-                else {
-                    if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
-                    }
-                    return links.resolvedSymbol = unknownSymbol;
-                }
-            }
-            return links.resolvedSymbol;
-        }
-        function getJsxElementInstanceType(node, valueType) {
-            ts.Debug.assert(!(valueType.flags & 16384));
-            if (isTypeAny(valueType)) {
-                return anyType;
-            }
-            var signatures = getSignaturesOfType(valueType, 1);
-            if (signatures.length === 0) {
-                signatures = getSignaturesOfType(valueType, 0);
-                if (signatures.length === 0) {
-                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
-                    return unknownType;
-                }
-            }
-            return getUnionType(signatures.map(getReturnTypeOfSignature));
-        }
-        function getJsxElementPropertiesName() {
-            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1536, undefined);
-            var attribsPropTypeSym = jsxNamespace && getSymbol(jsxNamespace.exports, JsxNames.ElementAttributesPropertyNameContainer, 793056);
-            var attribPropType = attribsPropTypeSym && getDeclaredTypeOfSymbol(attribsPropTypeSym);
-            var attribProperties = attribPropType && getPropertiesOfType(attribPropType);
-            if (attribProperties) {
-                if (attribProperties.length === 0) {
-                    return "";
-                }
-                else if (attribProperties.length === 1) {
-                    return attribProperties[0].name;
-                }
-                else {
-                    error(attribsPropTypeSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, JsxNames.ElementAttributesPropertyNameContainer);
-                    return undefined;
-                }
-            }
-            else {
-                return undefined;
-            }
-        }
-        function getResolvedJsxType(node, elemType, elemClassType) {
-            if (!elemType) {
-                elemType = checkExpression(node.tagName);
-            }
-            if (elemType.flags & 16384) {
-                var types = elemType.types;
-                return getUnionType(types.map(function (type) {
-                    return getResolvedJsxType(node, type, elemClassType);
-                }));
-            }
-            var elemInstanceType = getJsxElementInstanceType(node, elemType);
-            if (!elemClassType || !isTypeAssignableTo(elemInstanceType, elemClassType)) {
-                if (jsxElementType) {
-                    var callSignatures = elemType && getSignaturesOfType(elemType, 0);
-                    var callSignature = callSignatures && callSignatures.length > 0 && callSignatures[0];
-                    var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
-                    var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
-                    if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType)) {
-                        var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
-                        if (intrinsicAttributes !== unknownType) {
-                            paramType = intersectTypes(intrinsicAttributes, paramType);
-                        }
-                        return paramType;
-                    }
-                }
-            }
-            if (elemClassType) {
-                checkTypeRelatedTo(elemInstanceType, elemClassType, assignableRelation, node, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
-            }
-            if (isTypeAny(elemInstanceType)) {
-                return elemInstanceType;
-            }
-            var propsName = getJsxElementPropertiesName();
-            if (propsName === undefined) {
-                return anyType;
-            }
-            else if (propsName === "") {
-                return elemInstanceType;
-            }
-            else {
-                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
-                if (!attributesType) {
-                    return emptyObjectType;
-                }
-                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
-                    return attributesType;
-                }
-                else if (attributesType.flags & 16384) {
-                    error(node.tagName, ts.Diagnostics.JSX_element_attributes_type_0_may_not_be_a_union_type, typeToString(attributesType));
-                    return anyType;
-                }
-                else {
-                    var apparentAttributesType = attributesType;
-                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
-                    if (intrinsicClassAttribs !== unknownType) {
-                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
-                        if (typeParams) {
-                            if (typeParams.length === 1) {
-                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
-                            }
-                        }
-                        else {
-                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
-                        }
-                    }
-                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
-                    if (intrinsicAttribs !== unknownType) {
-                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
-                    }
-                    return apparentAttributesType;
-                }
-            }
-        }
-        function getJsxElementAttributesType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedJsxType) {
-                if (isJsxIntrinsicIdentifier(node.tagName)) {
-                    var symbol = getIntrinsicTagSymbol(node);
-                    if (links.jsxFlags & 1) {
-                        return links.resolvedJsxType = getTypeOfSymbol(symbol);
-                    }
-                    else if (links.jsxFlags & 2) {
-                        return links.resolvedJsxType = getIndexInfoOfSymbol(symbol, 0).type;
-                    }
-                    else {
-                        return links.resolvedJsxType = unknownType;
-                    }
-                }
-                else {
-                    var elemClassType = getJsxGlobalElementClassType();
-                    return links.resolvedJsxType = getResolvedJsxType(node, undefined, elemClassType);
-                }
-            }
-            return links.resolvedJsxType;
-        }
-        function getJsxAttributePropertySymbol(attrib) {
-            var attributesType = getJsxElementAttributesType(attrib.parent);
-            var prop = getPropertyOfType(attributesType, attrib.name.text);
-            return prop || unknownSymbol;
-        }
-        function getJsxGlobalElementClassType() {
-            if (!jsxElementClassType) {
-                jsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
-            }
-            return jsxElementClassType;
-        }
-        function getJsxIntrinsicTagNames() {
-            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
-            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
-        }
-        function checkJsxPreconditions(errorNode) {
-            if ((compilerOptions.jsx || 0) === 0) {
-                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
-            }
-            if (jsxElementType === undefined) {
-                if (compilerOptions.noImplicitAny) {
-                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
-                }
-            }
-        }
-        function checkJsxOpeningLikeElement(node) {
-            checkGrammarJsxElement(node);
-            checkJsxPreconditions(node);
-            var reactRefErr = compilerOptions.jsx === 2 ? ts.Diagnostics.Cannot_find_name_0 : undefined;
-            var reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
-            var reactSym = resolveName(node.tagName, reactNamespace, 107455, reactRefErr, reactNamespace);
-            if (reactSym) {
-                getSymbolLinks(reactSym).referenced = true;
-            }
-            var targetAttributesType = getJsxElementAttributesType(node);
-            var nameTable = {};
-            var sawSpreadedAny = false;
-            for (var i = node.attributes.length - 1; i >= 0; i--) {
-                if (node.attributes[i].kind === 246) {
-                    checkJsxAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                }
-                else {
-                    ts.Debug.assert(node.attributes[i].kind === 247);
-                    var spreadType = checkJsxSpreadAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                    if (isTypeAny(spreadType)) {
-                        sawSpreadedAny = true;
-                    }
-                }
-            }
-            if (targetAttributesType && !sawSpreadedAny) {
-                var targetProperties = getPropertiesOfType(targetAttributesType);
-                for (var i = 0; i < targetProperties.length; i++) {
-                    if (!(targetProperties[i].flags & 536870912) &&
-                        nameTable[targetProperties[i].name] === undefined) {
-                        error(node, ts.Diagnostics.Property_0_is_missing_in_type_1, targetProperties[i].name, typeToString(targetAttributesType));
-                    }
-                }
-            }
-        }
-        function checkJsxExpression(node) {
-            if (node.expression) {
-                return checkExpression(node.expression);
-            }
-            else {
-                return unknownType;
-            }
-        }
-        function getDeclarationKindFromSymbol(s) {
-            return s.valueDeclaration ? s.valueDeclaration.kind : 145;
-        }
-        function getDeclarationFlagsFromSymbol(s) {
-            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : s.flags & 134217728 ? 4 | 32 : 0;
-        }
-        function checkClassPropertyAccess(node, left, type, prop) {
-            var flags = getDeclarationFlagsFromSymbol(prop);
-            var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop));
-            var errorNode = node.kind === 172 || node.kind === 218 ?
-                node.name :
-                node.right;
-            if (left.kind === 95) {
-                if (languageVersion < 2 && getDeclarationKindFromSymbol(prop) !== 147) {
-                    error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
-                    return false;
-                }
-                if (flags & 128) {
-                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-            }
-            if (!(flags & (8 | 16))) {
-                return true;
-            }
-            if (flags & 8) {
-                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
-                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-                return true;
-            }
-            if (left.kind === 95) {
-                return true;
-            }
-            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
-                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
-                return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined;
-            });
-            if (!enclosingClass) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass));
-                return false;
-            }
-            if (flags & 32) {
-                return true;
-            }
-            if (type.flags & 33554432) {
-                type = getConstraintOfTypeParameter(type);
-            }
-            if (!(getTargetType(type).flags & (1024 | 2048) && hasBaseType(type, enclosingClass))) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
-                return false;
-            }
-            return true;
-        }
-        function checkNonNullExpression(node) {
-            var type = checkExpression(node);
-            if (strictNullChecks) {
-                var kind = getNullableKind(type);
-                if (kind) {
-                    error(node, kind & 32 ? kind & 64 ?
-                        ts.Diagnostics.Object_is_possibly_null_or_undefined :
-                        ts.Diagnostics.Object_is_possibly_undefined :
-                        ts.Diagnostics.Object_is_possibly_null);
-                }
-                return getNonNullableType(type);
-            }
-            return type;
-        }
-        function checkPropertyAccessExpression(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
-        }
-        function checkQualifiedName(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
-        }
-        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
-            var type = checkNonNullExpression(left);
-            if (isTypeAny(type)) {
-                return type;
-            }
-            var apparentType = getApparentType(getWidenedType(type));
-            if (apparentType === unknownType) {
-                return unknownType;
-            }
-            var prop = getPropertyOfType(apparentType, right.text);
-            if (!prop) {
-                if (right.text) {
-                    error(right, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(right), typeToString(type.flags & 33554432 ? apparentType : type));
-                }
-                return unknownType;
-            }
-            getNodeLinks(node).resolvedSymbol = prop;
-            if (prop.parent && prop.parent.flags & 32) {
-                checkClassPropertyAccess(node, left, apparentType, prop);
-            }
-            var propType = getTypeOfSymbol(prop);
-            if (node.kind !== 172 || ts.isAssignmentTarget(node) ||
-                !(propType.flags & 16384) && !(prop.flags & (3 | 4 | 98304))) {
-                return propType;
-            }
-            var leftmostNode = getLeftmostIdentifierOrThis(node);
-            if (!leftmostNode) {
-                return propType;
-            }
-            if (leftmostNode.kind === 69) {
-                var leftmostSymbol = getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(leftmostNode));
-                if (!leftmostSymbol) {
-                    return propType;
-                }
-                var declaration = leftmostSymbol.valueDeclaration;
-                if (!declaration || declaration.kind !== 218 && declaration.kind !== 142 && declaration.kind !== 169) {
-                    return propType;
-                }
-            }
-            return getFlowTypeOfReference(node, propType, true);
-        }
-        function isValidPropertyAccess(node, propertyName) {
-            var left = node.kind === 172
-                ? node.expression
-                : node.left;
-            var type = checkExpression(left);
-            if (type !== unknownType && !isTypeAny(type)) {
-                var prop = getPropertyOfType(getWidenedType(type), propertyName);
-                if (prop && prop.parent && prop.parent.flags & 32) {
-                    return checkClassPropertyAccess(node, left, type, prop);
-                }
-            }
-            return true;
-        }
-        function getForInVariableSymbol(node) {
-            var initializer = node.initializer;
-            if (initializer.kind === 219) {
-                var variable = initializer.declarations[0];
-                if (variable && !ts.isBindingPattern(variable.name)) {
-                    return getSymbolOfNode(variable);
-                }
-            }
-            else if (initializer.kind === 69) {
-                return getResolvedSymbol(initializer);
-            }
-            return undefined;
-        }
-        function hasNumericPropertyNames(type) {
-            return getIndexTypeOfType(type, 1) && !getIndexTypeOfType(type, 0);
-        }
-        function isForInVariableForNumericPropertyNames(expr) {
-            var e = skipParenthesizedNodes(expr);
-            if (e.kind === 69) {
-                var symbol = getResolvedSymbol(e);
-                if (symbol.flags & 3) {
-                    var child = expr;
-                    var node = expr.parent;
-                    while (node) {
-                        if (node.kind === 207 &&
-                            child === node.statement &&
-                            getForInVariableSymbol(node) === symbol &&
-                            hasNumericPropertyNames(checkExpression(node.expression))) {
-                            return true;
-                        }
-                        child = node;
-                        node = node.parent;
-                    }
-                }
-            }
-            return false;
-        }
-        function checkIndexedAccess(node) {
-            if (!node.argumentExpression) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                if (node.parent.kind === 175 && node.parent.expression === node) {
-                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
-                }
-                else {
-                    var start = node.end - "]".length;
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
-                }
-            }
-            var objectType = getApparentType(checkNonNullExpression(node.expression));
-            var indexType = node.argumentExpression ? checkExpression(node.argumentExpression) : unknownType;
-            if (objectType === unknownType) {
-                return unknownType;
-            }
-            var isConstEnum = isConstEnumObjectType(objectType);
-            if (isConstEnum &&
-                (!node.argumentExpression || node.argumentExpression.kind !== 9)) {
-                error(node.argumentExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
-                return unknownType;
-            }
-            if (node.argumentExpression) {
-                var name_12 = getPropertyNameForIndexedAccess(node.argumentExpression, indexType);
-                if (name_12 !== undefined) {
-                    var prop = getPropertyOfType(objectType, name_12);
-                    if (prop) {
-                        getNodeLinks(node).resolvedSymbol = prop;
-                        return getTypeOfSymbol(prop);
-                    }
-                    else if (isConstEnum) {
-                        error(node.argumentExpression, ts.Diagnostics.Property_0_does_not_exist_on_const_enum_1, name_12, symbolToString(objectType.symbol));
-                        return unknownType;
-                    }
-                }
-            }
-            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 258 | 132 | 16777216)) {
-                if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 132) || isForInVariableForNumericPropertyNames(node.argumentExpression)) {
-                    var numberIndexInfo = getIndexInfoOfType(objectType, 1);
-                    if (numberIndexInfo) {
-                        getNodeLinks(node).resolvedIndexInfo = numberIndexInfo;
-                        return numberIndexInfo.type;
-                    }
-                }
-                var stringIndexInfo = getIndexInfoOfType(objectType, 0);
-                if (stringIndexInfo) {
-                    getNodeLinks(node).resolvedIndexInfo = stringIndexInfo;
-                    return stringIndexInfo.type;
-                }
-                if (compilerOptions.noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors && !isTypeAny(objectType)) {
-                    error(node, getIndexTypeOfType(objectType, 1) ?
-                        ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number :
-                        ts.Diagnostics.Index_signature_of_object_type_implicitly_has_an_any_type);
-                }
-                return anyType;
-            }
-            error(node, ts.Diagnostics.An_index_expression_argument_must_be_of_type_string_number_symbol_or_any);
-            return unknownType;
-        }
-        function getPropertyNameForIndexedAccess(indexArgumentExpression, indexArgumentType) {
-            if (indexArgumentExpression.kind === 9 || indexArgumentExpression.kind === 8) {
-                return indexArgumentExpression.text;
-            }
-            if (indexArgumentExpression.kind === 173 || indexArgumentExpression.kind === 172) {
-                var value = getConstantValue(indexArgumentExpression);
-                if (value !== undefined) {
-                    return value.toString();
-                }
-            }
-            if (checkThatExpressionIsProperSymbolReference(indexArgumentExpression, indexArgumentType, false)) {
-                var rightHandSideName = indexArgumentExpression.name.text;
-                return ts.getPropertyNameForKnownSymbolName(rightHandSideName);
-            }
-            return undefined;
-        }
-        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
-            if (expressionType === unknownType) {
-                return false;
-            }
-            if (!ts.isWellKnownSymbolSyntactically(expression)) {
-                return false;
-            }
-            if ((expressionType.flags & 16777216) === 0) {
-                if (reportError) {
-                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
-                }
-                return false;
-            }
-            var leftHandSide = expression.expression;
-            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
-            if (!leftHandSideSymbol) {
-                return false;
-            }
-            var globalESSymbol = getGlobalESSymbolConstructorSymbol();
-            if (!globalESSymbol) {
-                return false;
-            }
-            if (leftHandSideSymbol !== globalESSymbol) {
-                if (reportError) {
-                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
-                }
-                return false;
-            }
-            return true;
-        }
-        function resolveUntypedCall(node) {
-            if (node.kind === 176) {
-                checkExpression(node.template);
-            }
-            else if (node.kind !== 143) {
-                ts.forEach(node.arguments, function (argument) {
-                    checkExpression(argument);
-                });
-            }
-            return anySignature;
-        }
-        function resolveErrorCall(node) {
-            resolveUntypedCall(node);
-            return unknownSignature;
-        }
-        function reorderCandidates(signatures, result) {
-            var lastParent;
-            var lastSymbol;
-            var cutoffIndex = 0;
-            var index;
-            var specializedIndex = -1;
-            var spliceIndex;
-            ts.Debug.assert(!result.length);
-            for (var _i = 0, signatures_2 = signatures; _i < signatures_2.length; _i++) {
-                var signature = signatures_2[_i];
-                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
-                var parent_9 = signature.declaration && signature.declaration.parent;
-                if (!lastSymbol || symbol === lastSymbol) {
-                    if (lastParent && parent_9 === lastParent) {
-                        index++;
-                    }
-                    else {
-                        lastParent = parent_9;
-                        index = cutoffIndex;
-                    }
-                }
-                else {
-                    index = cutoffIndex = result.length;
-                    lastParent = parent_9;
-                }
-                lastSymbol = symbol;
-                if (signature.hasStringLiterals) {
-                    specializedIndex++;
-                    spliceIndex = specializedIndex;
-                    cutoffIndex++;
-                }
-                else {
-                    spliceIndex = index;
-                }
-                result.splice(spliceIndex, 0, signature);
-            }
-        }
-        function getSpreadArgumentIndex(args) {
-            for (var i = 0; i < args.length; i++) {
-                var arg = args[i];
-                if (arg && arg.kind === 191) {
-                    return i;
-                }
-            }
-            return -1;
-        }
-        function hasCorrectArity(node, args, signature) {
-            var adjustedArgCount;
-            var typeArguments;
-            var callIsIncomplete;
-            var isDecorator;
-            var spreadArgIndex = -1;
-            if (node.kind === 176) {
-                var tagExpression = node;
-                adjustedArgCount = args.length;
-                typeArguments = undefined;
-                if (tagExpression.template.kind === 189) {
-                    var templateExpression = tagExpression.template;
-                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
-                    ts.Debug.assert(lastSpan !== undefined);
-                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
-                }
-                else {
-                    var templateLiteral = tagExpression.template;
-                    ts.Debug.assert(templateLiteral.kind === 11);
-                    callIsIncomplete = !!templateLiteral.isUnterminated;
-                }
-            }
-            else if (node.kind === 143) {
-                isDecorator = true;
-                typeArguments = undefined;
-                adjustedArgCount = getEffectiveArgumentCount(node, undefined, signature);
-            }
-            else {
-                var callExpression = node;
-                if (!callExpression.arguments) {
-                    ts.Debug.assert(callExpression.kind === 175);
-                    return signature.minArgumentCount === 0;
-                }
-                adjustedArgCount = callExpression.arguments.hasTrailingComma ? args.length + 1 : args.length;
-                callIsIncomplete = callExpression.arguments.end === callExpression.end;
-                typeArguments = callExpression.typeArguments;
-                spreadArgIndex = getSpreadArgumentIndex(args);
-            }
-            var hasRightNumberOfTypeArgs = !typeArguments ||
-                (signature.typeParameters && typeArguments.length === signature.typeParameters.length);
-            if (!hasRightNumberOfTypeArgs) {
-                return false;
-            }
-            if (spreadArgIndex >= 0) {
-                return isRestParameterIndex(signature, spreadArgIndex);
-            }
-            if (!signature.hasRestParameter && adjustedArgCount > signature.parameters.length) {
-                return false;
-            }
-            var hasEnoughArguments = adjustedArgCount >= signature.minArgumentCount;
-            return callIsIncomplete || hasEnoughArguments;
-        }
-        function getSingleCallSignature(type) {
-            if (type.flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
-                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                    return resolved.callSignatures[0];
-                }
-            }
-            return undefined;
-        }
-        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
-            var context = createInferenceContext(signature.typeParameters, true);
-            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
-                inferTypes(context, instantiateType(source, contextualMapper), target);
-            });
-            return getSignatureInstantiation(signature, getInferredTypes(context));
-        }
-        function inferTypeArguments(node, signature, args, excludeArgument, context) {
-            var typeParameters = signature.typeParameters;
-            var inferenceMapper = getInferenceMapper(context);
-            for (var i = 0; i < typeParameters.length; i++) {
-                if (!context.inferences[i].isFixed) {
-                    context.inferredTypes[i] = undefined;
-                }
-            }
-            if (context.failedTypeParameterIndex !== undefined && !context.inferences[context.failedTypeParameterIndex].isFixed) {
-                context.failedTypeParameterIndex = undefined;
-            }
-            if (signature.thisType) {
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                inferTypes(context, thisArgumentType, signature.thisType);
-            }
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                if (arg === undefined || arg.kind !== 193) {
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    if (argType === undefined) {
-                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : inferenceMapper;
-                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
-                    }
-                    inferTypes(context, argType, paramType);
-                }
-            }
-            if (excludeArgument) {
-                for (var i = 0; i < argCount; i++) {
-                    if (excludeArgument[i] === false) {
-                        var arg = args[i];
-                        var paramType = getTypeAtPosition(signature, i);
-                        inferTypes(context, checkExpressionWithContextualType(arg, paramType, inferenceMapper), paramType);
-                    }
-                }
-            }
-            getInferredTypes(context);
-        }
-        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
-            var typeParameters = signature.typeParameters;
-            var typeArgumentsAreAssignable = true;
-            var mapper;
-            for (var i = 0; i < typeParameters.length; i++) {
-                if (typeArgumentsAreAssignable) {
-                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                    if (constraint) {
-                        var errorInfo = void 0;
-                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
-                        if (reportErrors && headMessage) {
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
-                            typeArgumentHeadMessage = headMessage;
-                        }
-                        if (!mapper) {
-                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
-                        }
-                        var typeArgument = typeArgumentTypes[i];
-                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
-                    }
-                }
-            }
-            return typeArgumentsAreAssignable;
-        }
-        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
-            if (signature.thisType && signature.thisType !== voidType && node.kind !== 175) {
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
-                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
-                if (!checkTypeRelatedTo(thisArgumentType, signature.thisType, relation, errorNode, headMessage_1)) {
-                    return false;
-                }
-            }
-            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                if (arg === undefined || arg.kind !== 193) {
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    if (argType === undefined) {
-                        argType = arg.kind === 9 && !reportErrors
-                            ? getStringLiteralTypeForText(arg.text)
-                            : checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
-                    }
-                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
-                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        function getThisArgumentOfCall(node) {
-            if (node.kind === 174) {
-                var callee = node.expression;
-                if (callee.kind === 172) {
-                    return callee.expression;
-                }
-                else if (callee.kind === 173) {
-                    return callee.expression;
-                }
-            }
-        }
-        function getEffectiveCallArguments(node) {
-            var args;
-            if (node.kind === 176) {
-                var template = node.template;
-                args = [undefined];
-                if (template.kind === 189) {
-                    ts.forEach(template.templateSpans, function (span) {
-                        args.push(span.expression);
-                    });
-                }
-            }
-            else if (node.kind === 143) {
-                return undefined;
-            }
-            else {
-                args = node.arguments || emptyArray;
-            }
-            return args;
-        }
-        function getEffectiveArgumentCount(node, args, signature) {
-            if (node.kind === 143) {
-                switch (node.parent.kind) {
-                    case 221:
-                    case 192:
-                        return 1;
-                    case 145:
-                        return 2;
-                    case 147:
-                    case 149:
-                    case 150:
-                        if (languageVersion === 0) {
-                            return 2;
-                        }
-                        return signature.parameters.length >= 3 ? 3 : 2;
-                    case 142:
-                        return 3;
-                }
-            }
-            else {
-                return args.length;
-            }
-        }
-        function getEffectiveDecoratorFirstArgumentType(node) {
-            if (node.kind === 221) {
-                var classSymbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(classSymbol);
-            }
-            if (node.kind === 142) {
-                node = node.parent;
-                if (node.kind === 148) {
-                    var classSymbol = getSymbolOfNode(node);
-                    return getTypeOfSymbol(classSymbol);
-                }
-            }
-            if (node.kind === 145 ||
-                node.kind === 147 ||
-                node.kind === 149 ||
-                node.kind === 150) {
-                return getParentTypeOfClassElement(node);
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        function getEffectiveDecoratorSecondArgumentType(node) {
-            if (node.kind === 221) {
-                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 142) {
-                node = node.parent;
-                if (node.kind === 148) {
-                    return anyType;
-                }
-            }
-            if (node.kind === 145 ||
-                node.kind === 147 ||
-                node.kind === 149 ||
-                node.kind === 150) {
-                var element = node;
-                switch (element.name.kind) {
-                    case 69:
-                    case 8:
-                    case 9:
-                        return getStringLiteralTypeForText(element.name.text);
-                    case 140:
-                        var nameType = checkComputedPropertyName(element.name);
-                        if (isTypeOfKind(nameType, 16777216)) {
-                            return nameType;
-                        }
-                        else {
-                            return stringType;
-                        }
-                    default:
-                        ts.Debug.fail("Unsupported property name.");
-                        return unknownType;
-                }
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        function getEffectiveDecoratorThirdArgumentType(node) {
-            if (node.kind === 221) {
-                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 142) {
-                return numberType;
-            }
-            if (node.kind === 145) {
-                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 147 ||
-                node.kind === 149 ||
-                node.kind === 150) {
-                var propertyType = getTypeOfNode(node);
-                return createTypedPropertyDescriptorType(propertyType);
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        function getEffectiveDecoratorArgumentType(node, argIndex) {
-            if (argIndex === 0) {
-                return getEffectiveDecoratorFirstArgumentType(node.parent);
-            }
-            else if (argIndex === 1) {
-                return getEffectiveDecoratorSecondArgumentType(node.parent);
-            }
-            else if (argIndex === 2) {
-                return getEffectiveDecoratorThirdArgumentType(node.parent);
-            }
-            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
-            return unknownType;
-        }
-        function getEffectiveArgumentType(node, argIndex, arg) {
-            if (node.kind === 143) {
-                return getEffectiveDecoratorArgumentType(node, argIndex);
-            }
-            else if (argIndex === 0 && node.kind === 176) {
-                return getGlobalTemplateStringsArrayType();
-            }
-            return undefined;
-        }
-        function getEffectiveArgument(node, args, argIndex) {
-            if (node.kind === 143 ||
-                (argIndex === 0 && node.kind === 176)) {
-                return undefined;
-            }
-            return args[argIndex];
-        }
-        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
-            if (node.kind === 143) {
-                return node.expression;
-            }
-            else if (argIndex === 0 && node.kind === 176) {
-                return node.template;
-            }
-            else {
-                return arg;
-            }
-        }
-        function resolveCall(node, signatures, candidatesOutArray, headMessage) {
-            var isTaggedTemplate = node.kind === 176;
-            var isDecorator = node.kind === 143;
-            var typeArguments;
-            if (!isTaggedTemplate && !isDecorator) {
-                typeArguments = node.typeArguments;
-                if (node.expression.kind !== 95) {
-                    ts.forEach(typeArguments, checkSourceElement);
-                }
-            }
-            var candidates = candidatesOutArray || [];
-            reorderCandidates(signatures, candidates);
-            if (!candidates.length) {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
-                return resolveErrorCall(node);
-            }
-            var args = getEffectiveCallArguments(node);
-            var excludeArgument;
-            if (!isDecorator) {
-                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
-                    if (isContextSensitive(args[i])) {
-                        if (!excludeArgument) {
-                            excludeArgument = new Array(args.length);
-                        }
-                        excludeArgument[i] = true;
-                    }
-                }
-            }
-            var candidateForArgumentError;
-            var candidateForTypeArgumentError;
-            var resultOfFailedInference;
-            var result;
-            if (candidates.length > 1) {
-                result = chooseOverload(candidates, subtypeRelation);
-            }
-            if (!result) {
-                candidateForArgumentError = undefined;
-                candidateForTypeArgumentError = undefined;
-                resultOfFailedInference = undefined;
-                result = chooseOverload(candidates, assignableRelation);
-            }
-            if (result) {
-                return result;
-            }
-            if (candidateForArgumentError) {
-                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, undefined, true);
-            }
-            else if (candidateForTypeArgumentError) {
-                if (!isTaggedTemplate && !isDecorator && typeArguments) {
-                    var typeArguments_2 = node.typeArguments;
-                    checkTypeArguments(candidateForTypeArgumentError, typeArguments_2, ts.map(typeArguments_2, getTypeFromTypeNode), true, headMessage);
-                }
-                else {
-                    ts.Debug.assert(resultOfFailedInference.failedTypeParameterIndex >= 0);
-                    var failedTypeParameter = candidateForTypeArgumentError.typeParameters[resultOfFailedInference.failedTypeParameterIndex];
-                    var inferenceCandidates = getInferenceCandidates(resultOfFailedInference, resultOfFailedInference.failedTypeParameterIndex);
-                    var diagnosticChainHead = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly, typeToString(failedTypeParameter));
-                    if (headMessage) {
-                        diagnosticChainHead = ts.chainDiagnosticMessages(diagnosticChainHead, headMessage);
-                    }
-                    reportNoCommonSupertypeError(inferenceCandidates, node.expression || node.tag, diagnosticChainHead);
-                }
-            }
-            else {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
-            }
-            if (!produceDiagnostics) {
-                for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
-                    var candidate = candidates_1[_i];
-                    if (hasCorrectArity(node, args, candidate)) {
-                        if (candidate.typeParameters && typeArguments) {
-                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNode));
-                        }
-                        return candidate;
-                    }
-                }
-            }
-            return resolveErrorCall(node);
-            function reportError(message, arg0, arg1, arg2) {
-                var errorInfo;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
-                if (headMessage) {
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
-            }
-            function chooseOverload(candidates, relation) {
-                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
-                    var originalCandidate = candidates_2[_i];
-                    if (!hasCorrectArity(node, args, originalCandidate)) {
-                        continue;
-                    }
-                    var candidate = void 0;
-                    var typeArgumentsAreValid = void 0;
-                    var inferenceContext = originalCandidate.typeParameters
-                        ? createInferenceContext(originalCandidate.typeParameters, false)
-                        : undefined;
-                    while (true) {
-                        candidate = originalCandidate;
-                        if (candidate.typeParameters) {
-                            var typeArgumentTypes = void 0;
-                            if (typeArguments) {
-                                typeArgumentTypes = ts.map(typeArguments, getTypeFromTypeNode);
-                                typeArgumentsAreValid = checkTypeArguments(candidate, typeArguments, typeArgumentTypes, false);
-                            }
-                            else {
-                                inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
-                                typeArgumentsAreValid = inferenceContext.failedTypeParameterIndex === undefined;
-                                typeArgumentTypes = inferenceContext.inferredTypes;
-                            }
-                            if (!typeArgumentsAreValid) {
-                                break;
-                            }
-                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
-                        }
-                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, false)) {
-                            break;
-                        }
-                        var index = excludeArgument ? ts.indexOf(excludeArgument, true) : -1;
-                        if (index < 0) {
-                            return candidate;
-                        }
-                        excludeArgument[index] = false;
-                    }
-                    if (originalCandidate.typeParameters) {
-                        var instantiatedCandidate = candidate;
-                        if (typeArgumentsAreValid) {
-                            candidateForArgumentError = instantiatedCandidate;
-                        }
-                        else {
-                            candidateForTypeArgumentError = originalCandidate;
-                            if (!typeArguments) {
-                                resultOfFailedInference = inferenceContext;
-                            }
-                        }
-                    }
-                    else {
-                        ts.Debug.assert(originalCandidate === candidate);
-                        candidateForArgumentError = originalCandidate;
-                    }
-                }
-                return undefined;
-            }
-        }
-        function resolveCallExpression(node, candidatesOutArray) {
-            if (node.expression.kind === 95) {
-                var superType = checkSuperExpression(node.expression);
-                if (superType !== unknownType) {
-                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
-                    if (baseTypeNode) {
-                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments);
-                        return resolveCall(node, baseConstructors, candidatesOutArray);
-                    }
-                }
-                return resolveUntypedCall(node);
-            }
-            var funcType = checkNonNullExpression(node.expression);
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0);
-            var constructSignatures = getSignaturesOfType(apparentType, 1);
-            if (isTypeAny(funcType) || (!callSignatures.length && !constructSignatures.length && !(funcType.flags & 16384) && isTypeAssignableTo(funcType, globalFunctionType))) {
-                if (funcType !== unknownType && node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
-                }
-                return resolveUntypedCall(node);
-            }
-            if (!callSignatures.length) {
-                if (constructSignatures.length) {
-                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
-                }
-                else {
-                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                }
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        function resolveNewExpression(node, candidatesOutArray) {
-            if (node.arguments && languageVersion < 1) {
-                var spreadIndex = getSpreadArgumentIndex(node.arguments);
-                if (spreadIndex >= 0) {
-                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
-                }
-            }
-            var expressionType = checkNonNullExpression(node.expression);
-            expressionType = getApparentType(expressionType);
-            if (expressionType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
-            if (valueDecl && valueDecl.flags & 128) {
-                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
-                return resolveErrorCall(node);
-            }
-            if (isTypeAny(expressionType)) {
-                if (node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
-                }
-                return resolveUntypedCall(node);
-            }
-            var constructSignatures = getSignaturesOfType(expressionType, 1);
-            if (constructSignatures.length) {
-                if (!isConstructorAccessible(node, constructSignatures[0])) {
-                    return resolveErrorCall(node);
-                }
-                return resolveCall(node, constructSignatures, candidatesOutArray);
-            }
-            var callSignatures = getSignaturesOfType(expressionType, 0);
-            if (callSignatures.length) {
-                var signature = resolveCall(node, callSignatures, candidatesOutArray);
-                if (getReturnTypeOfSignature(signature) !== voidType) {
-                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
-                }
-                if (signature.thisType === voidType) {
-                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
-                }
-                return signature;
-            }
-            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
-            return resolveErrorCall(node);
-        }
-        function isConstructorAccessible(node, signature) {
-            if (!signature || !signature.declaration) {
-                return true;
-            }
-            var declaration = signature.declaration;
-            var flags = declaration.flags;
-            if (!(flags & (8 | 16))) {
-                return true;
-            }
-            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
-            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
-            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                if (flags & 8) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
-                if (flags & 16) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
-                return false;
-            }
-            return true;
-        }
-        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
-            var tagType = checkExpression(node.tag);
-            var apparentType = getApparentType(tagType);
-            if (apparentType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0);
-            if (isTypeAny(tagType) || (!callSignatures.length && !(tagType.flags & 16384) && isTypeAssignableTo(tagType, globalFunctionType))) {
-                return resolveUntypedCall(node);
-            }
-            if (!callSignatures.length) {
-                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        function getDiagnosticHeadMessageForDecoratorResolution(node) {
-            switch (node.parent.kind) {
-                case 221:
-                case 192:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
-                case 142:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
-                case 145:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
-                case 147:
-                case 149:
-                case 150:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
-            }
-        }
-        function resolveDecorator(node, candidatesOutArray) {
-            var funcType = checkExpression(node.expression);
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0);
-            if (funcType === anyType || (!callSignatures.length && !(funcType.flags & 16384) && isTypeAssignableTo(funcType, globalFunctionType))) {
-                return resolveUntypedCall(node);
-            }
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            if (!callSignatures.length) {
-                var errorInfo = void 0;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
-        }
-        function resolveSignature(node, candidatesOutArray) {
-            switch (node.kind) {
-                case 174:
-                    return resolveCallExpression(node, candidatesOutArray);
-                case 175:
-                    return resolveNewExpression(node, candidatesOutArray);
-                case 176:
-                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
-                case 143:
-                    return resolveDecorator(node, candidatesOutArray);
-            }
-            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
-        }
-        function getResolvedSignature(node, candidatesOutArray) {
-            var links = getNodeLinks(node);
-            var cached = links.resolvedSignature;
-            if (cached && cached !== anySignature && !candidatesOutArray) {
-                return cached;
-            }
-            links.resolvedSignature = anySignature;
-            var result = resolveSignature(node, candidatesOutArray);
-            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
-            return result;
-        }
-        function getResolvedOrAnySignature(node) {
-            return getNodeLinks(node).resolvedSignature === anySignature ? anySignature : getResolvedSignature(node);
-        }
-        function getInferredClassType(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.inferredClassType) {
-                links.inferredClassType = createAnonymousType(undefined, symbol.members, emptyArray, emptyArray, undefined, undefined);
-            }
-            return links.inferredClassType;
-        }
-        function checkCallExpression(node) {
-            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
-            var signature = getResolvedSignature(node);
-            if (node.expression.kind === 95) {
-                return voidType;
-            }
-            if (node.kind === 175) {
-                var declaration = signature.declaration;
-                if (declaration &&
-                    declaration.kind !== 148 &&
-                    declaration.kind !== 152 &&
-                    declaration.kind !== 157 &&
-                    !ts.isJSDocConstructSignature(declaration)) {
-                    var funcSymbol = checkExpression(node.expression).symbol;
-                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16)) {
-                        return getInferredClassType(funcSymbol);
-                    }
-                    else if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
-                    }
-                    return anyType;
-                }
-            }
-            if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, true)) {
-                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
-            }
-            return getReturnTypeOfSignature(signature);
-        }
-        function checkTaggedTemplateExpression(node) {
-            return getReturnTypeOfSignature(getResolvedSignature(node));
-        }
-        function checkAssertion(node) {
-            var exprType = getRegularTypeOfObjectLiteral(checkExpression(node.expression));
-            var targetType = getTypeFromTypeNode(node.type);
-            if (produceDiagnostics && targetType !== unknownType) {
-                var widenedType = getWidenedType(exprType);
-                if (!isTypeComparableTo(targetType, widenedType)) {
-                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
-                }
-            }
-            return targetType;
-        }
-        function checkNonNullAssertion(node) {
-            return getNonNullableType(checkExpression(node.expression));
-        }
-        function getTypeOfParameter(symbol) {
-            var type = getTypeOfSymbol(symbol);
-            if (strictNullChecks) {
-                var declaration = symbol.valueDeclaration;
-                if (declaration && declaration.initializer) {
-                    return addNullableKind(type, 32);
-                }
-            }
-            return type;
-        }
-        function getTypeAtPosition(signature, pos) {
-            return signature.hasRestParameter ?
-                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
-                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
-        }
-        function assignContextualParameterTypes(signature, context, mapper) {
-            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
-            for (var i = 0; i < len; i++) {
-                var parameter = signature.parameters[i];
-                var contextualParameterType = getTypeAtPosition(context, i);
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
-            }
-            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
-                var parameter = ts.lastOrUndefined(signature.parameters);
-                var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
-            }
-        }
-        function assignBindingElementTypes(node) {
-            if (ts.isBindingPattern(node.name)) {
-                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (element.kind !== 193) {
-                        if (element.name.kind === 69) {
-                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
-                        }
-                        assignBindingElementTypes(element);
-                    }
-                }
-            }
-        }
-        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType, mapper) {
-            var links = getSymbolLinks(parameter);
-            if (!links.type) {
-                links.type = instantiateType(contextualType, mapper);
-                if (links.type === emptyObjectType &&
-                    (parameter.valueDeclaration.name.kind === 167 ||
-                        parameter.valueDeclaration.name.kind === 168)) {
-                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
-                }
-                assignBindingElementTypes(parameter.valueDeclaration);
-            }
-            else if (isInferentialContext(mapper)) {
-                inferTypes(mapper.context, links.type, instantiateType(contextualType, mapper));
-            }
-        }
-        function getReturnTypeFromJSDocComment(func) {
-            var returnTag = ts.getJSDocReturnTag(func);
-            if (returnTag && returnTag.typeExpression) {
-                return getTypeFromTypeNode(returnTag.typeExpression.type);
-            }
-            return undefined;
-        }
-        function createPromiseType(promisedType) {
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType !== emptyGenericType) {
-                promisedType = getAwaitedType(promisedType);
-                return createTypeReference(globalPromiseType, [promisedType]);
-            }
-            return emptyObjectType;
-        }
-        function getReturnTypeFromBody(func, contextualMapper) {
-            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
-            if (!func.body) {
-                return unknownType;
-            }
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var type;
-            if (func.body.kind !== 199) {
-                type = checkExpressionCached(func.body, contextualMapper);
-                if (isAsync) {
-                    type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                }
-            }
-            else {
-                var types = void 0;
-                var funcIsGenerator = !!func.asteriskToken;
-                if (funcIsGenerator) {
-                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
-                    if (types.length === 0) {
-                        var iterableIteratorAny = createIterableIteratorType(anyType);
-                        if (compilerOptions.noImplicitAny) {
-                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
-                        }
-                        return iterableIteratorAny;
-                    }
-                }
-                else {
-                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
-                    if (!types) {
-                        return neverType;
-                    }
-                    if (types.length === 0) {
-                        if (isAsync) {
-                            var promiseType = createPromiseType(voidType);
-                            if (promiseType === emptyObjectType) {
-                                error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-                                return unknownType;
-                            }
-                            return promiseType;
-                        }
-                        return voidType;
-                    }
-                }
-                type = contextualSignature ? getUnionType(types) : getCommonSupertype(types);
-                if (!type) {
-                    if (funcIsGenerator) {
-                        error(func, ts.Diagnostics.No_best_common_type_exists_among_yield_expressions);
-                        return createIterableIteratorType(unknownType);
-                    }
-                    else {
-                        error(func, ts.Diagnostics.No_best_common_type_exists_among_return_expressions);
-                        return getUnionType(types);
-                    }
-                }
-                if (funcIsGenerator) {
-                    type = createIterableIteratorType(type);
-                }
-            }
-            if (!contextualSignature) {
-                reportErrorsFromWidening(func, type);
-            }
-            var widenedType = getWidenedType(type);
-            if (isAsync) {
-                var promiseType = createPromiseType(widenedType);
-                if (promiseType === emptyObjectType) {
-                    error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-                    return unknownType;
-                }
-                return promiseType;
-            }
-            else {
-                return widenedType;
-            }
-        }
-        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
-            var aggregatedTypes = [];
-            ts.forEachYieldExpression(func.body, function (yieldExpression) {
-                var expr = yieldExpression.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (yieldExpression.asteriskToken) {
-                        type = checkElementTypeOfIterable(type, yieldExpression.expression);
-                    }
-                    if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
-                    }
-                }
-            });
-            return aggregatedTypes;
-        }
-        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var aggregatedTypes = [];
-            var hasReturnWithNoExpression = !!(func.flags & 32768);
-            var hasReturnOfTypeNever = false;
-            ts.forEachReturnStatement(func.body, function (returnStatement) {
-                var expr = returnStatement.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (isAsync) {
-                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                    }
-                    if (type === neverType) {
-                        hasReturnOfTypeNever = true;
-                    }
-                    else if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
-                    }
-                }
-                else {
-                    hasReturnWithNoExpression = true;
-                }
-            });
-            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
-                func.kind === 179 || func.kind === 180)) {
-                return undefined;
-            }
-            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
-                if (!ts.contains(aggregatedTypes, undefinedType)) {
-                    aggregatedTypes.push(undefinedType);
-                }
-            }
-            return aggregatedTypes;
-        }
-        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            if (returnType && maybeTypeOfKind(returnType, 1 | 16)) {
-                return;
-            }
-            if (ts.nodeIsMissing(func.body) || func.body.kind !== 199 || !(func.flags & 32768)) {
-                return;
-            }
-            var hasExplicitReturn = func.flags & 65536;
-            if (returnType === neverType) {
-                error(func.type, ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
-            }
-            else if (returnType && !hasExplicitReturn) {
-                error(func.type, ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
-            }
-            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
-                error(func.type, ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
-            }
-            else if (compilerOptions.noImplicitReturns) {
-                if (!returnType) {
-                    if (!hasExplicitReturn) {
-                        return;
-                    }
-                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
-                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
-                        return;
-                    }
-                }
-                error(func.type || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
-            }
-        }
-        function checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper) {
-            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
-            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
-            if (!hasGrammarError && node.kind === 179) {
-                checkGrammarForGenerator(node);
-            }
-            if (contextualMapper === identityMapper && isContextSensitive(node)) {
-                checkNodeDeferred(node);
-                return anyFunctionType;
-            }
-            var links = getNodeLinks(node);
-            var type = getTypeOfSymbol(node.symbol);
-            var contextSensitive = isContextSensitive(node);
-            var mightFixTypeParameters = contextSensitive && isInferentialContext(contextualMapper);
-            if (mightFixTypeParameters || !(links.flags & 1024)) {
-                var contextualSignature = getContextualSignature(node);
-                var contextChecked = !!(links.flags & 1024);
-                if (mightFixTypeParameters || !contextChecked) {
-                    links.flags |= 1024;
-                    if (contextualSignature) {
-                        var signature = getSignaturesOfType(type, 0)[0];
-                        if (contextSensitive) {
-                            assignContextualParameterTypes(signature, contextualSignature, contextualMapper || identityMapper);
-                        }
-                        if (mightFixTypeParameters || !node.type && !signature.resolvedReturnType) {
-                            var returnType = getReturnTypeFromBody(node, contextualMapper);
-                            if (!signature.resolvedReturnType) {
-                                signature.resolvedReturnType = returnType;
-                            }
-                        }
-                    }
-                    if (!contextChecked) {
-                        checkSignatureDeclaration(node);
-                        checkNodeDeferred(node);
-                    }
-                }
-            }
-            if (produceDiagnostics && node.kind !== 147 && node.kind !== 146) {
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-            }
-            return type;
-        }
-        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
-            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
-            var isAsync = ts.isAsyncFunctionLike(node);
-            var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-            if (!node.asteriskToken) {
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (node.body) {
-                if (!node.type) {
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
-                }
-                if (node.body.kind === 199) {
-                    checkSourceElement(node.body);
-                }
-                else {
-                    var exprType = checkExpression(node.body);
-                    if (returnOrPromisedType) {
-                        if (isAsync) {
-                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member);
-                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
-                        }
-                    }
-                }
-            }
-        }
-        function checkArithmeticOperandType(operand, type, diagnostic) {
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 132)) {
-                error(operand, diagnostic);
-                return false;
-            }
-            return true;
-        }
-        function isReadonlySymbol(symbol) {
-            return symbol.flags & 4 && (getDeclarationFlagsFromSymbol(symbol) & 64) !== 0 ||
-                symbol.flags & 3 && (getDeclarationFlagsFromSymbol(symbol) & 2048) !== 0 ||
-                symbol.flags & 98304 && !(symbol.flags & 65536) ||
-                (symbol.flags & 8) !== 0;
-        }
-        function isReferenceToReadonlyEntity(expr, symbol) {
-            if (isReadonlySymbol(symbol)) {
-                if (symbol.flags & 4 &&
-                    (expr.kind === 172 || expr.kind === 173) &&
-                    expr.expression.kind === 97) {
-                    var func = ts.getContainingFunction(expr);
-                    if (!(func && func.kind === 148))
-                        return true;
-                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
-                }
-                return true;
-            }
-            return false;
-        }
-        function isReferenceThroughNamespaceImport(expr) {
-            if (expr.kind === 172 || expr.kind === 173) {
-                var node = skipParenthesizedNodes(expr.expression);
-                if (node.kind === 69) {
-                    var symbol = getNodeLinks(node).resolvedSymbol;
-                    if (symbol.flags & 8388608) {
-                        var declaration = getDeclarationOfAliasSymbol(symbol);
-                        return declaration && declaration.kind === 232;
-                    }
-                }
-            }
-            return false;
-        }
-        function checkReferenceExpression(expr, invalidReferenceMessage, constantVariableMessage) {
-            var node = skipParenthesizedNodes(expr);
-            if (node.kind !== 69 && node.kind !== 172 && node.kind !== 173) {
-                error(expr, invalidReferenceMessage);
-                return false;
-            }
-            var links = getNodeLinks(node);
-            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
-            if (symbol) {
-                if (symbol !== unknownSymbol && symbol !== argumentsSymbol) {
-                    if (node.kind === 69 && !(symbol.flags & 3)) {
-                        error(expr, invalidReferenceMessage);
-                        return false;
-                    }
-                    if (isReferenceToReadonlyEntity(node, symbol) || isReferenceThroughNamespaceImport(node)) {
-                        error(expr, constantVariableMessage);
-                        return false;
-                    }
-                }
-            }
-            else if (node.kind === 173) {
-                if (links.resolvedIndexInfo && links.resolvedIndexInfo.isReadonly) {
-                    error(expr, constantVariableMessage);
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkDeleteExpression(node) {
-            checkExpression(node.expression);
-            return booleanType;
-        }
-        function checkTypeOfExpression(node) {
-            checkExpression(node.expression);
-            return stringType;
-        }
-        function checkVoidExpression(node) {
-            checkExpression(node.expression);
-            return undefinedType;
-        }
-        function checkAwaitExpression(node) {
-            if (produceDiagnostics) {
-                if (!(node.flags & 33554432)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
-                }
-            }
-            var operandType = checkExpression(node.expression);
-            return checkAwaitedType(operandType, node);
-        }
-        function checkPrefixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            switch (node.operator) {
-                case 35:
-                case 36:
-                case 50:
-                    if (maybeTypeOfKind(operandType, 16777216)) {
-                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
-                    }
-                    return numberType;
-                case 49:
-                    return booleanType;
-                case 41:
-                case 42:
-                    var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-                    if (ok) {
-                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
-                    }
-                    return numberType;
-            }
-            return unknownType;
-        }
-        function checkPostfixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-            if (ok) {
-                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
-            }
-            return numberType;
-        }
-        function maybeTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 49152) {
-                var types = type.types;
-                for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
-                    var t = types_10[_i];
-                    if (maybeTypeOfKind(t, kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 16384) {
-                var types = type.types;
-                for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
-                    var t = types_11[_i];
-                    if (!isTypeOfKind(t, kind)) {
-                        return false;
-                    }
-                }
-                return true;
-            }
-            if (type.flags & 32768) {
-                var types = type.types;
-                for (var _a = 0, types_12 = types; _a < types_12.length; _a++) {
-                    var t = types_12[_a];
-                    if (isTypeOfKind(t, kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isConstEnumObjectType(type) {
-            return type.flags & (80896 | 65536) && type.symbol && isConstEnumSymbol(type.symbol);
-        }
-        function isConstEnumSymbol(symbol) {
-            return (symbol.flags & 128) !== 0;
-        }
-        function checkInstanceOfExpression(left, right, leftType, rightType) {
-            if (isTypeOfKind(leftType, 16777726)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            if (!(isTypeAny(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
-            }
-            return booleanType;
-        }
-        function checkInExpression(left, right, leftType, rightType) {
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 | 132 | 16777216)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
-            }
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 | 512)) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            return booleanType;
-        }
-        function checkObjectLiteralAssignment(node, sourceType, contextualMapper) {
-            var properties = node.properties;
-            for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
-                var p = properties_3[_i];
-                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, contextualMapper);
-            }
-            return sourceType;
-        }
-        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, contextualMapper) {
-            if (property.kind === 253 || property.kind === 254) {
-                var name_13 = property.name;
-                if (name_13.kind === 140) {
-                    checkComputedPropertyName(name_13);
-                }
-                if (isComputedNonLiteralName(name_13)) {
-                    return undefined;
-                }
-                var text = getTextOfPropertyName(name_13);
-                var type = isTypeAny(objectLiteralType)
-                    ? objectLiteralType
-                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
-                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1) ||
-                        getIndexTypeOfType(objectLiteralType, 0);
-                if (type) {
-                    if (property.kind === 254) {
-                        return checkDestructuringAssignment(property, type);
-                    }
-                    else {
-                        return checkDestructuringAssignment(property.initializer, type);
-                    }
-                }
-                else {
-                    error(name_13, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_13));
-                }
-            }
-            else {
-                error(property, ts.Diagnostics.Property_assignment_expected);
-            }
-        }
-        function checkArrayLiteralAssignment(node, sourceType, contextualMapper) {
-            var elementType = checkIteratedTypeOrElementType(sourceType, node, false) || unknownType;
-            var elements = node.elements;
-            for (var i = 0; i < elements.length; i++) {
-                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, contextualMapper);
-            }
-            return sourceType;
-        }
-        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, contextualMapper) {
-            var elements = node.elements;
-            var element = elements[elementIndex];
-            if (element.kind !== 193) {
-                if (element.kind !== 191) {
-                    var propName = "" + elementIndex;
-                    var type = isTypeAny(sourceType)
-                        ? sourceType
-                        : isTupleLikeType(sourceType)
-                            ? getTypeOfPropertyOfType(sourceType, propName)
-                            : elementType;
-                    if (type) {
-                        return checkDestructuringAssignment(element, type, contextualMapper);
-                    }
-                    else {
-                        if (isTupleType(sourceType)) {
-                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), sourceType.elementTypes.length, elements.length);
-                        }
-                        else {
-                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
-                        }
-                    }
-                }
-                else {
-                    if (elementIndex < elements.length - 1) {
-                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
-                    }
-                    else {
-                        var restExpression = element.expression;
-                        if (restExpression.kind === 187 && restExpression.operatorToken.kind === 56) {
-                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
-                        }
-                        else {
-                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), contextualMapper);
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function checkDestructuringAssignment(exprOrAssignment, sourceType, contextualMapper) {
-            var target;
-            if (exprOrAssignment.kind === 254) {
-                var prop = exprOrAssignment;
-                if (prop.objectAssignmentInitializer) {
-                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, contextualMapper);
-                }
-                target = exprOrAssignment.name;
-            }
-            else {
-                target = exprOrAssignment;
-            }
-            if (target.kind === 187 && target.operatorToken.kind === 56) {
-                checkBinaryExpression(target, contextualMapper);
-                target = target.left;
-            }
-            if (target.kind === 171) {
-                return checkObjectLiteralAssignment(target, sourceType, contextualMapper);
-            }
-            if (target.kind === 170) {
-                return checkArrayLiteralAssignment(target, sourceType, contextualMapper);
-            }
-            return checkReferenceAssignment(target, sourceType, contextualMapper);
-        }
-        function checkReferenceAssignment(target, sourceType, contextualMapper) {
-            var targetType = checkExpression(target, contextualMapper);
-            if (checkReferenceExpression(target, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property)) {
-                checkTypeAssignableTo(sourceType, targetType, target, undefined);
-            }
-            return sourceType;
-        }
-        function isTypeEqualityComparableTo(source, target) {
-            return (target.flags & 96) !== 0 || isTypeComparableTo(source, target);
-        }
-        function checkBinaryExpression(node, contextualMapper) {
-            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, contextualMapper, node);
-        }
-        function checkBinaryLikeExpression(left, operatorToken, right, contextualMapper, errorNode) {
-            var operator = operatorToken.kind;
-            if (operator === 56 && (left.kind === 171 || left.kind === 170)) {
-                return checkDestructuringAssignment(left, checkExpression(right, contextualMapper), contextualMapper);
-            }
-            var leftType = checkExpression(left, contextualMapper);
-            var rightType = checkExpression(right, contextualMapper);
-            switch (operator) {
-                case 37:
-                case 38:
-                case 59:
-                case 60:
-                case 39:
-                case 61:
-                case 40:
-                case 62:
-                case 36:
-                case 58:
-                case 43:
-                case 63:
-                case 44:
-                case 64:
-                case 45:
-                case 65:
-                case 47:
-                case 67:
-                case 48:
-                case 68:
-                case 46:
-                case 66:
-                    if (leftType.flags & 96)
-                        leftType = rightType;
-                    if (rightType.flags & 96)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var suggestedOperator = void 0;
-                    if ((leftType.flags & 8) &&
-                        (rightType.flags & 8) &&
-                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
-                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
-                    }
-                    else {
-                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        if (leftOk && rightOk) {
-                            checkAssignmentOperator(numberType);
-                        }
-                    }
-                    return numberType;
-                case 35:
-                case 57:
-                    if (leftType.flags & 96)
-                        leftType = rightType;
-                    if (rightType.flags & 96)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var resultType = void 0;
-                    if (isTypeOfKind(leftType, 132) && isTypeOfKind(rightType, 132)) {
-                        resultType = numberType;
-                    }
-                    else {
-                        if (isTypeOfKind(leftType, 258) || isTypeOfKind(rightType, 258)) {
-                            resultType = stringType;
-                        }
-                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
-                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
-                        }
-                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
-                            return resultType;
-                        }
-                    }
-                    if (!resultType) {
-                        reportOperatorError();
-                        return anyType;
-                    }
-                    if (operator === 57) {
-                        checkAssignmentOperator(resultType);
-                    }
-                    return resultType;
-                case 25:
-                case 27:
-                case 28:
-                case 29:
-                    if (checkForDisallowedESSymbolOperand(operator)) {
-                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
-                            reportOperatorError();
-                        }
-                    }
-                    return booleanType;
-                case 30:
-                case 31:
-                case 32:
-                case 33:
-                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
-                        reportOperatorError();
-                    }
-                    return booleanType;
-                case 91:
-                    return checkInstanceOfExpression(left, right, leftType, rightType);
-                case 90:
-                    return checkInExpression(left, right, leftType, rightType);
-                case 51:
-                    return addNullableKind(rightType, getNullableKind(leftType));
-                case 52:
-                    return getUnionType([getNonNullableType(leftType), rightType]);
-                case 56:
-                    checkAssignmentOperator(rightType);
-                    return getRegularTypeOfObjectLiteral(rightType);
-                case 24:
-                    return rightType;
-            }
-            function checkForDisallowedESSymbolOperand(operator) {
-                var offendingSymbolOperand = maybeTypeOfKind(leftType, 16777216) ? left :
-                    maybeTypeOfKind(rightType, 16777216) ? right :
-                        undefined;
-                if (offendingSymbolOperand) {
-                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
-                    return false;
-                }
-                return true;
-            }
-            function getSuggestedBooleanOperator(operator) {
-                switch (operator) {
-                    case 47:
-                    case 67:
-                        return 52;
-                    case 48:
-                    case 68:
-                        return 33;
-                    case 46:
-                    case 66:
-                        return 51;
-                    default:
-                        return undefined;
-                }
-            }
-            function checkAssignmentOperator(valueType) {
-                if (produceDiagnostics && operator >= 56 && operator <= 68) {
-                    var ok = checkReferenceExpression(left, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property);
-                    if (ok) {
-                        checkTypeAssignableTo(valueType, leftType, left, undefined);
-                    }
-                }
-            }
-            function reportOperatorError() {
-                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
-            }
-        }
-        function isYieldExpressionInClass(node) {
-            var current = node;
-            var parent = node.parent;
-            while (parent) {
-                if (ts.isFunctionLike(parent) && current === parent.body) {
-                    return false;
-                }
-                else if (ts.isClassLike(current)) {
-                    return true;
-                }
-                current = parent;
-                parent = parent.parent;
-            }
-            return false;
-        }
-        function checkYieldExpression(node) {
-            if (produceDiagnostics) {
-                if (!(node.flags & 8388608) || isYieldExpressionInClass(node)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
-                }
-            }
-            if (node.expression) {
-                var func = ts.getContainingFunction(node);
-                if (func && func.asteriskToken) {
-                    var expressionType = checkExpressionCached(node.expression, undefined);
-                    var expressionElementType = void 0;
-                    var nodeIsYieldStar = !!node.asteriskToken;
-                    if (nodeIsYieldStar) {
-                        expressionElementType = checkElementTypeOfIterable(expressionType, node.expression);
-                    }
-                    if (func.type) {
-                        var signatureElementType = getElementTypeOfIterableIterator(getTypeFromTypeNode(func.type)) || anyType;
-                        if (nodeIsYieldStar) {
-                            checkTypeAssignableTo(expressionElementType, signatureElementType, node.expression, undefined);
-                        }
-                        else {
-                            checkTypeAssignableTo(expressionType, signatureElementType, node.expression, undefined);
-                        }
-                    }
-                }
-            }
-            return anyType;
-        }
-        function checkConditionalExpression(node, contextualMapper) {
-            checkExpression(node.condition);
-            var type1 = checkExpression(node.whenTrue, contextualMapper);
-            var type2 = checkExpression(node.whenFalse, contextualMapper);
-            return getUnionType([type1, type2]);
-        }
-        function checkStringLiteralExpression(node) {
-            var contextualType = getContextualType(node);
-            if (contextualType && contextualTypeIsStringLiteralType(contextualType)) {
-                return getStringLiteralTypeForText(node.text);
-            }
-            return stringType;
-        }
-        function checkTemplateExpression(node) {
-            ts.forEach(node.templateSpans, function (templateSpan) {
-                checkExpression(templateSpan.expression);
-            });
-            return stringType;
-        }
-        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
-            var saveContextualType = node.contextualType;
-            node.contextualType = contextualType;
-            var result = checkExpression(node, contextualMapper);
-            node.contextualType = saveContextualType;
-            return result;
-        }
-        function checkExpressionCached(node, contextualMapper) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var saveFlowLoopStart = flowLoopStart;
-                flowLoopStart = flowLoopCount;
-                links.resolvedType = checkExpression(node, contextualMapper);
-                flowLoopStart = saveFlowLoopStart;
-            }
-            return links.resolvedType;
-        }
-        function checkPropertyAssignment(node, contextualMapper) {
-            if (node.name.kind === 140) {
-                checkComputedPropertyName(node.name);
-            }
-            return checkExpression(node.initializer, contextualMapper);
-        }
-        function checkObjectLiteralMethod(node, contextualMapper) {
-            checkGrammarMethod(node);
-            if (node.name.kind === 140) {
-                checkComputedPropertyName(node.name);
-            }
-            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
-        }
-        function instantiateTypeWithSingleGenericCallSignature(node, type, contextualMapper) {
-            if (isInferentialContext(contextualMapper)) {
-                var signature = getSingleCallSignature(type);
-                if (signature && signature.typeParameters) {
-                    var contextualType = getApparentTypeOfContextualType(node);
-                    if (contextualType) {
-                        var contextualSignature = getSingleCallSignature(contextualType);
-                        if (contextualSignature && !contextualSignature.typeParameters) {
-                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper));
-                        }
-                    }
-                }
-            }
-            return type;
-        }
-        function checkExpression(node, contextualMapper) {
-            var type;
-            if (node.kind === 139) {
-                type = checkQualifiedName(node);
-            }
-            else {
-                var uninstantiatedType = checkExpressionWorker(node, contextualMapper);
-                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
-            }
-            if (isConstEnumObjectType(type)) {
-                var ok = (node.parent.kind === 172 && node.parent.expression === node) ||
-                    (node.parent.kind === 173 && node.parent.expression === node) ||
-                    ((node.kind === 69 || node.kind === 139) && isInRightSideOfImportOrExportAssignment(node));
-                if (!ok) {
-                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
-                }
-            }
-            return type;
-        }
-        function checkNumericLiteral(node) {
-            checkGrammarNumericLiteral(node);
-            return numberType;
-        }
-        function checkExpressionWorker(node, contextualMapper) {
-            switch (node.kind) {
-                case 69:
-                    return checkIdentifier(node);
-                case 97:
-                    return checkThisExpression(node);
-                case 95:
-                    return checkSuperExpression(node);
-                case 93:
-                    return nullType;
-                case 99:
-                case 84:
-                    return booleanType;
-                case 8:
-                    return checkNumericLiteral(node);
-                case 189:
-                    return checkTemplateExpression(node);
-                case 9:
-                    return checkStringLiteralExpression(node);
-                case 11:
-                    return stringType;
-                case 10:
-                    return globalRegExpType;
-                case 170:
-                    return checkArrayLiteral(node, contextualMapper);
-                case 171:
-                    return checkObjectLiteral(node, contextualMapper);
-                case 172:
-                    return checkPropertyAccessExpression(node);
-                case 173:
-                    return checkIndexedAccess(node);
-                case 174:
-                case 175:
-                    return checkCallExpression(node);
-                case 176:
-                    return checkTaggedTemplateExpression(node);
-                case 178:
-                    return checkExpression(node.expression, contextualMapper);
-                case 192:
-                    return checkClassExpression(node);
-                case 179:
-                case 180:
-                    return checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-                case 182:
-                    return checkTypeOfExpression(node);
-                case 177:
-                case 195:
-                    return checkAssertion(node);
-                case 196:
-                    return checkNonNullAssertion(node);
-                case 181:
-                    return checkDeleteExpression(node);
-                case 183:
-                    return checkVoidExpression(node);
-                case 184:
-                    return checkAwaitExpression(node);
-                case 185:
-                    return checkPrefixUnaryExpression(node);
-                case 186:
-                    return checkPostfixUnaryExpression(node);
-                case 187:
-                    return checkBinaryExpression(node, contextualMapper);
-                case 188:
-                    return checkConditionalExpression(node, contextualMapper);
-                case 191:
-                    return checkSpreadElementExpression(node, contextualMapper);
-                case 193:
-                    return undefinedType;
-                case 190:
-                    return checkYieldExpression(node);
-                case 248:
-                    return checkJsxExpression(node);
-                case 241:
-                    return checkJsxElement(node);
-                case 242:
-                    return checkJsxSelfClosingElement(node);
-                case 243:
-                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
-            }
-            return unknownType;
-        }
-        function checkTypeParameter(node) {
-            if (node.expression) {
-                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
-            }
-            checkSourceElement(node.constraint);
-            getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node)));
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
-            }
-        }
-        function checkParameter(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkVariableLikeDeclaration(node);
-            var func = ts.getContainingFunction(node);
-            if (node.flags & 92) {
-                func = ts.getContainingFunction(node);
-                if (!(func.kind === 148 && ts.nodeIsPresent(func.body))) {
-                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
-                }
-            }
-            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
-                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
-            }
-            if (node.name.text === "this") {
-                if (ts.indexOf(func.parameters, node) !== 0) {
-                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
-                }
-                if (func.kind === 148 || func.kind === 152 || func.kind === 157) {
-                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
-                }
-            }
-            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
-                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
-            }
-        }
-        function isSyntacticallyValidGenerator(node) {
-            if (!node.asteriskToken || !node.body) {
-                return false;
-            }
-            return node.kind === 147 ||
-                node.kind === 220 ||
-                node.kind === 179;
-        }
-        function getTypePredicateParameterIndex(parameterList, parameter) {
-            if (parameterList) {
-                for (var i = 0; i < parameterList.length; i++) {
-                    var param = parameterList[i];
-                    if (param.name.kind === 69 &&
-                        param.name.text === parameter.text) {
-                        return i;
-                    }
-                }
-            }
-            return -1;
-        }
-        function checkTypePredicate(node) {
-            var parent = getTypePredicateParent(node);
-            if (!parent) {
-                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
-                return;
-            }
-            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
-            if (!typePredicate) {
-                return;
-            }
-            var parameterName = node.parameterName;
-            if (ts.isThisTypePredicate(typePredicate)) {
-                getTypeFromThisTypeNode(parameterName);
-            }
-            else {
-                if (typePredicate.parameterIndex >= 0) {
-                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
-                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
-                    }
-                    else {
-                        var leadingError = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
-                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, undefined, leadingError);
-                    }
-                }
-                else if (parameterName) {
-                    var hasReportedError = false;
-                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
-                        var name_14 = _a[_i].name;
-                        if (ts.isBindingPattern(name_14) &&
-                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_14, parameterName, typePredicate.parameterName)) {
-                            hasReportedError = true;
-                            break;
-                        }
-                    }
-                    if (!hasReportedError) {
-                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
-                    }
-                }
-            }
-        }
-        function getTypePredicateParent(node) {
-            switch (node.parent.kind) {
-                case 180:
-                case 151:
-                case 220:
-                case 179:
-                case 156:
-                case 147:
-                case 146:
-                    var parent_10 = node.parent;
-                    if (node === parent_10.type) {
-                        return parent_10;
-                    }
-            }
-        }
-        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
-            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
-                var name_15 = _a[_i].name;
-                if (name_15.kind === 69 &&
-                    name_15.text === predicateVariableName) {
-                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
-                    return true;
-                }
-                else if (name_15.kind === 168 ||
-                    name_15.kind === 167) {
-                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_15, predicateVariableNode, predicateVariableName)) {
-                        return true;
-                    }
-                }
-            }
-        }
-        function checkSignatureDeclaration(node) {
-            if (node.kind === 153) {
-                checkGrammarIndexSignature(node);
-            }
-            else if (node.kind === 156 || node.kind === 220 || node.kind === 157 ||
-                node.kind === 151 || node.kind === 148 ||
-                node.kind === 152) {
-                checkGrammarFunctionLikeDeclaration(node);
-            }
-            checkTypeParameters(node.typeParameters);
-            ts.forEach(node.parameters, checkParameter);
-            if (node.type) {
-                checkSourceElement(node.type);
-            }
-            if (produceDiagnostics) {
-                checkCollisionWithArgumentsInGeneratedCode(node);
-                if (compilerOptions.noImplicitAny && !node.type) {
-                    switch (node.kind) {
-                        case 152:
-                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
-                        case 151:
-                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
-                    }
-                }
-                if (node.type) {
-                    if (languageVersion >= 2 && isSyntacticallyValidGenerator(node)) {
-                        var returnType = getTypeFromTypeNode(node.type);
-                        if (returnType === voidType) {
-                            error(node.type, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
-                        }
-                        else {
-                            var generatorElementType = getElementTypeOfIterableIterator(returnType) || anyType;
-                            var iterableIteratorInstantiation = createIterableIteratorType(generatorElementType);
-                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, node.type);
-                        }
-                    }
-                    else if (ts.isAsyncFunctionLike(node)) {
-                        checkAsyncFunctionReturnType(node);
-                    }
-                }
-            }
-        }
-        function checkClassForDuplicateDeclarations(node) {
-            var getter = 1, setter = 2, property = getter | setter;
-            var instanceNames = {};
-            var staticNames = {};
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind === 148) {
-                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
-                        var param = _c[_b];
-                        if (ts.isParameterPropertyDeclaration(param)) {
-                            addName(instanceNames, param.name, param.name.text, property);
-                        }
-                    }
-                }
-                else {
-                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113; });
-                    var names = static ? staticNames : instanceNames;
-                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
-                    if (memberName) {
-                        switch (member.kind) {
-                            case 149:
-                                addName(names, member.name, memberName, getter);
-                                break;
-                            case 150:
-                                addName(names, member.name, memberName, setter);
-                                break;
-                            case 145:
-                                addName(names, member.name, memberName, property);
-                                break;
-                        }
-                    }
-                }
-            }
-            function addName(names, location, name, meaning) {
-                if (ts.hasProperty(names, name)) {
-                    var prev = names[name];
-                    if (prev & meaning) {
-                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
-                    }
-                    else {
-                        names[name] = prev | meaning;
-                    }
-                }
-                else {
-                    names[name] = meaning;
-                }
-            }
-        }
-        function checkObjectTypeForDuplicateDeclarations(node) {
-            var names = {};
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind == 144) {
-                    var memberName = void 0;
-                    switch (member.name.kind) {
-                        case 9:
-                        case 8:
-                        case 69:
-                            memberName = member.name.text;
-                            break;
-                        default:
-                            continue;
-                    }
-                    if (ts.hasProperty(names, memberName)) {
-                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
-                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
-                    }
-                    else {
-                        names[memberName] = true;
-                    }
-                }
-            }
-        }
-        function checkTypeForDuplicateIndexSignatures(node) {
-            if (node.kind === 222) {
-                var nodeSymbol = getSymbolOfNode(node);
-                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
-                    return;
-                }
-            }
-            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
-            if (indexSymbol) {
-                var seenNumericIndexer = false;
-                var seenStringIndexer = false;
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var declaration = decl;
-                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
-                        switch (declaration.parameters[0].type.kind) {
-                            case 132:
-                                if (!seenStringIndexer) {
-                                    seenStringIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
-                                }
-                                break;
-                            case 130:
-                                if (!seenNumericIndexer) {
-                                    seenNumericIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
-                                }
-                                break;
-                        }
-                    }
-                }
-            }
-        }
-        function checkPropertyDeclaration(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
-            checkVariableLikeDeclaration(node);
-        }
-        function checkMethodDeclaration(node) {
-            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
-            checkFunctionOrMethodDeclaration(node);
-            if (node.flags & 128 && node.body) {
-                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
-            }
-        }
-        function checkConstructorDeclaration(node) {
-            checkSignatureDeclaration(node);
-            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
-            checkSourceElement(node.body);
-            var symbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
-            if (node === firstDeclaration) {
-                checkFunctionOrConstructorSymbol(symbol);
-            }
-            if (ts.nodeIsMissing(node.body)) {
-                return;
-            }
-            if (!produceDiagnostics) {
-                return;
-            }
-            function containsSuperCallAsComputedPropertyName(n) {
-                return n.name && containsSuperCall(n.name);
-            }
-            function containsSuperCall(n) {
-                if (ts.isSuperCallExpression(n)) {
-                    return true;
-                }
-                else if (ts.isFunctionLike(n)) {
-                    return false;
-                }
-                else if (ts.isClassLike(n)) {
-                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
-                }
-                return ts.forEachChild(n, containsSuperCall);
-            }
-            function markThisReferencesAsErrors(n) {
-                if (n.kind === 97) {
-                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
-                }
-                else if (n.kind !== 179 && n.kind !== 220) {
-                    ts.forEachChild(n, markThisReferencesAsErrors);
-                }
-            }
-            function isInstancePropertyWithInitializer(n) {
-                return n.kind === 145 &&
-                    !(n.flags & 32) &&
-                    !!n.initializer;
-            }
-            var containingClassDecl = node.parent;
-            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
-                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
-                var superCall = getSuperCallInConstructor(node);
-                if (superCall) {
-                    if (classExtendsNull) {
-                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
-                    }
-                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
-                        ts.forEach(node.parameters, function (p) { return p.flags & 92; });
-                    if (superCallShouldBeFirst) {
-                        var statements = node.body.statements;
-                        var superCallStatement = void 0;
-                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
-                            var statement = statements_2[_i];
-                            if (statement.kind === 202 && ts.isSuperCallExpression(statement.expression)) {
-                                superCallStatement = statement;
-                                break;
-                            }
-                            if (!ts.isPrologueDirective(statement)) {
-                                break;
-                            }
-                        }
-                        if (!superCallStatement) {
-                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
-                        }
-                    }
-                }
-                else if (!classExtendsNull) {
-                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
-                }
-            }
-        }
-        function checkAccessorDeclaration(node) {
-            if (produceDiagnostics) {
-                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
-                checkDecorators(node);
-                checkSignatureDeclaration(node);
-                if (node.kind === 149) {
-                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 32768)) {
-                        if (node.flags & 65536) {
-                            if (compilerOptions.noImplicitReturns) {
-                                error(node.name, ts.Diagnostics.Not_all_code_paths_return_a_value);
-                            }
-                        }
-                        else {
-                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
-                        }
-                    }
-                }
-                if (node.name.kind === 140) {
-                    checkComputedPropertyName(node.name);
-                }
-                if (!ts.hasDynamicName(node)) {
-                    var otherKind = node.kind === 149 ? 150 : 149;
-                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
-                    if (otherAccessor) {
-                        if (((node.flags & 28) !== (otherAccessor.flags & 28))) {
-                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
-                        }
-                        if (((node.flags & 128) !== (otherAccessor.flags & 128))) {
-                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
-                        }
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorThisType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
-                    }
-                }
-                getTypeOfAccessors(getSymbolOfNode(node));
-            }
-            if (node.parent.kind !== 171) {
-                checkSourceElement(node.body);
-            }
-            else {
-                checkNodeDeferred(node);
-            }
-        }
-        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
-            var firstType = getAnnotatedType(first);
-            var secondType = getAnnotatedType(second);
-            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
-                error(first, message);
-            }
-        }
-        function checkAccessorDeferred(node) {
-            checkSourceElement(node.body);
-        }
-        function checkMissingDeclaration(node) {
-            checkDecorators(node);
-        }
-        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
-            var typeArguments;
-            var mapper;
-            var result = true;
-            for (var i = 0; i < typeParameters.length; i++) {
-                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                if (constraint) {
-                    if (!typeArguments) {
-                        typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
-                        mapper = createTypeMapper(typeParameters, typeArguments);
-                    }
-                    var typeArgument = typeArguments[i];
-                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
-                }
-            }
-            return result;
-        }
-        function checkTypeReferenceNode(node) {
-            checkGrammarTypeArguments(node, node.typeArguments);
-            var type = getTypeFromTypeReference(node);
-            if (type !== unknownType && node.typeArguments) {
-                ts.forEach(node.typeArguments, checkSourceElement);
-                if (produceDiagnostics) {
-                    var symbol = getNodeLinks(node).resolvedSymbol;
-                    var typeParameters = symbol.flags & 524288 ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
-                    checkTypeArgumentConstraints(typeParameters, node.typeArguments);
-                }
-            }
-        }
-        function checkTypeQuery(node) {
-            getTypeFromTypeQueryNode(node);
-        }
-        function checkTypeLiteral(node) {
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-                checkObjectTypeForDuplicateDeclarations(node);
-            }
-        }
-        function checkArrayType(node) {
-            checkSourceElement(node.elementType);
-        }
-        function checkTupleType(node) {
-            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
-            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
-                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
-            }
-            ts.forEach(node.elementTypes, checkSourceElement);
-        }
-        function checkUnionOrIntersectionType(node) {
-            ts.forEach(node.types, checkSourceElement);
-        }
-        function isPrivateWithinAmbient(node) {
-            return (node.flags & 8) && ts.isInAmbientContext(node);
-        }
-        function getEffectiveDeclarationFlags(n, flagsToCheck) {
-            var flags = ts.getCombinedNodeFlags(n);
-            if (n.parent.kind !== 222 &&
-                n.parent.kind !== 221 &&
-                n.parent.kind !== 192 &&
-                ts.isInAmbientContext(n)) {
-                if (!(flags & 2)) {
-                    flags |= 1;
-                }
-                flags |= 2;
-            }
-            return flags & flagsToCheck;
-        }
-        function checkFunctionOrConstructorSymbol(symbol) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            function getCanonicalOverload(overloads, implementation) {
-                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
-                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
-            }
-            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
-                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
-                if (someButNotAllOverloadFlags !== 0) {
-                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
-                    ts.forEach(overloads, function (o) {
-                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
-                        if (deviation & 1) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
-                        }
-                        else if (deviation & 2) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
-                        }
-                        else if (deviation & (8 | 16)) {
-                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
-                        }
-                        else if (deviation & 128) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
-                        }
-                    });
-                }
-            }
-            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
-                if (someHaveQuestionToken !== allHaveQuestionToken) {
-                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
-                    ts.forEach(overloads, function (o) {
-                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
-                        if (deviation) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
-                        }
-                    });
-                }
-            }
-            var flagsToCheck = 1 | 2 | 8 | 16 | 128;
-            var someNodeFlags = 0;
-            var allNodeFlags = flagsToCheck;
-            var someHaveQuestionToken = false;
-            var allHaveQuestionToken = true;
-            var hasOverloads = false;
-            var bodyDeclaration;
-            var lastSeenNonAmbientDeclaration;
-            var previousDeclaration;
-            var declarations = symbol.declarations;
-            var isConstructor = (symbol.flags & 16384) !== 0;
-            function reportImplementationExpectedError(node) {
-                if (node.name && ts.nodeIsMissing(node.name)) {
-                    return;
-                }
-                var seen = false;
-                var subsequentNode = ts.forEachChild(node.parent, function (c) {
-                    if (seen) {
-                        return c;
-                    }
-                    else {
-                        seen = c === node;
-                    }
-                });
-                if (subsequentNode && subsequentNode.pos === node.end) {
-                    if (subsequentNode.kind === node.kind) {
-                        var errorNode_1 = subsequentNode.name || subsequentNode;
-                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
-                            var reportError = (node.kind === 147 || node.kind === 146) &&
-                                (node.flags & 32) !== (subsequentNode.flags & 32);
-                            if (reportError) {
-                                var diagnostic = node.flags & 32 ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
-                                error(errorNode_1, diagnostic);
-                            }
-                            return;
-                        }
-                        else if (ts.nodeIsPresent(subsequentNode.body)) {
-                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
-                            return;
-                        }
-                    }
-                }
-                var errorNode = node.name || node;
-                if (isConstructor) {
-                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
-                }
-                else {
-                    if (node.flags & 128) {
-                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
-                    }
-                    else {
-                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
-                    }
-                }
-            }
-            var isExportSymbolInsideModule = symbol.parent && symbol.parent.flags & 1536;
-            var duplicateFunctionDeclaration = false;
-            var multipleConstructorImplementation = false;
-            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
-                var current = declarations_4[_i];
-                var node = current;
-                var inAmbientContext = ts.isInAmbientContext(node);
-                var inAmbientContextOrInterface = node.parent.kind === 222 || node.parent.kind === 159 || inAmbientContext;
-                if (inAmbientContextOrInterface) {
-                    previousDeclaration = undefined;
-                }
-                if (node.kind === 220 || node.kind === 147 || node.kind === 146 || node.kind === 148) {
-                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
-                    someNodeFlags |= currentNodeFlags;
-                    allNodeFlags &= currentNodeFlags;
-                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
-                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
-                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
-                        if (isConstructor) {
-                            multipleConstructorImplementation = true;
-                        }
-                        else {
-                            duplicateFunctionDeclaration = true;
-                        }
-                    }
-                    else if (!isExportSymbolInsideModule && previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
-                        reportImplementationExpectedError(previousDeclaration);
-                    }
-                    if (ts.nodeIsPresent(node.body)) {
-                        if (!bodyDeclaration) {
-                            bodyDeclaration = node;
-                        }
-                    }
-                    else {
-                        hasOverloads = true;
-                    }
-                    previousDeclaration = node;
-                    if (!inAmbientContextOrInterface) {
-                        lastSeenNonAmbientDeclaration = node;
-                    }
-                }
-            }
-            if (multipleConstructorImplementation) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
-                });
-            }
-            if (duplicateFunctionDeclaration) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
-                });
-            }
-            if (!isExportSymbolInsideModule && lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
-                !(lastSeenNonAmbientDeclaration.flags & 128) && !lastSeenNonAmbientDeclaration.questionToken) {
-                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
-            }
-            if (hasOverloads) {
-                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
-                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
-                if (bodyDeclaration) {
-                    var signatures = getSignaturesOfSymbol(symbol);
-                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
-                    for (var _a = 0, signatures_3 = signatures; _a < signatures_3.length; _a++) {
-                        var signature = signatures_3[_a];
-                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
-                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
-                            break;
-                        }
-                    }
-                }
-            }
-        }
-        function checkExportsOnMergedDeclarations(node) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            var symbol = node.localSymbol;
-            if (!symbol) {
-                symbol = getSymbolOfNode(node);
-                if (!(symbol.flags & 7340032)) {
-                    return;
-                }
-            }
-            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
-                return;
-            }
-            var exportedDeclarationSpaces = 0;
-            var nonExportedDeclarationSpaces = 0;
-            var defaultExportedDeclarationSpaces = 0;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var d = _a[_i];
-                var declarationSpaces = getDeclarationSpaces(d);
-                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 | 512);
-                if (effectiveDeclarationFlags & 1) {
-                    if (effectiveDeclarationFlags & 512) {
-                        defaultExportedDeclarationSpaces |= declarationSpaces;
-                    }
-                    else {
-                        exportedDeclarationSpaces |= declarationSpaces;
-                    }
-                }
-                else {
-                    nonExportedDeclarationSpaces |= declarationSpaces;
-                }
-            }
-            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
-            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
-                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
-                    var d = _c[_b];
-                    var declarationSpaces = getDeclarationSpaces(d);
-                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
-                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
-                    }
-                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
-                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
-                    }
-                }
-            }
-            function getDeclarationSpaces(d) {
-                switch (d.kind) {
-                    case 222:
-                        return 2097152;
-                    case 225:
-                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0
-                            ? 4194304 | 1048576
-                            : 4194304;
-                    case 221:
-                    case 224:
-                        return 2097152 | 1048576;
-                    case 229:
-                        var result_1 = 0;
-                        var target = resolveAlias(getSymbolOfNode(d));
-                        ts.forEach(target.declarations, function (d) { result_1 |= getDeclarationSpaces(d); });
-                        return result_1;
-                    default:
-                        return 1048576;
-                }
-            }
-        }
-        function checkNonThenableType(type, location, message) {
-            type = getWidenedType(type);
-            if (!isTypeAny(type) && isTypeAssignableTo(type, getGlobalThenableType())) {
-                if (location) {
-                    if (!message) {
-                        message = ts.Diagnostics.Operand_for_await_does_not_have_a_valid_callable_then_member;
-                    }
-                    error(location, message);
-                }
-                return unknownType;
-            }
-            return type;
-        }
-        function getPromisedType(promise) {
-            if (promise.flags & 1) {
-                return undefined;
-            }
-            if ((promise.flags & 4096) && promise.target === tryGetGlobalPromiseType()) {
-                return promise.typeArguments[0];
-            }
-            var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType();
-            if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) {
-                return undefined;
-            }
-            var thenFunction = getTypeOfPropertyOfType(promise, "then");
-            if (thenFunction && (thenFunction.flags & 1)) {
-                return undefined;
-            }
-            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0) : emptyArray;
-            if (thenSignatures.length === 0) {
-                return undefined;
-            }
-            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072);
-            if (onfulfilledParameterType.flags & 1) {
-                return undefined;
-            }
-            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0);
-            if (onfulfilledParameterSignatures.length === 0) {
-                return undefined;
-            }
-            var valueParameterType = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature));
-            return valueParameterType;
-        }
-        function getTypeOfFirstParameterOfSignature(signature) {
-            return getTypeAtPosition(signature, 0);
-        }
-        function getAwaitedType(type) {
-            return checkAwaitedType(type, undefined, undefined);
-        }
-        function checkAwaitedType(type, location, message) {
-            return checkAwaitedTypeWorker(type);
-            function checkAwaitedTypeWorker(type) {
-                if (type.flags & 16384) {
-                    var types = [];
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var constituentType = _a[_i];
-                        types.push(checkAwaitedTypeWorker(constituentType));
-                    }
-                    return getUnionType(types);
-                }
-                else {
-                    var promisedType = getPromisedType(type);
-                    if (promisedType === undefined) {
-                        return checkNonThenableType(type, location, message);
-                    }
-                    else {
-                        if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
-                            if (location) {
-                                error(location, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method, symbolToString(type.symbol));
-                            }
-                            return unknownType;
-                        }
-                        awaitedTypeStack.push(type.id);
-                        var awaitedType = checkAwaitedTypeWorker(promisedType);
-                        awaitedTypeStack.pop();
-                        return awaitedType;
-                    }
-                }
-            }
-        }
-        function checkCorrectPromiseType(returnType, location) {
-            if (returnType === unknownType) {
-                return unknownType;
-            }
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType === emptyGenericType
-                || globalPromiseType === getTargetType(returnType)) {
-                return checkAwaitedType(returnType, location, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-            }
-            error(location, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
-            return unknownType;
-        }
-        function checkAsyncFunctionReturnType(node) {
-            if (languageVersion >= 2) {
-                var returnType = getTypeFromTypeNode(node.type);
-                return checkCorrectPromiseType(returnType, node.type);
-            }
-            var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType();
-            if (globalPromiseConstructorLikeType === emptyObjectType) {
-                return unknownType;
-            }
-            var promiseType = getTypeFromTypeNode(node.type);
-            if (promiseType === unknownType && compilerOptions.isolatedModules) {
-                return unknownType;
-            }
-            var promiseConstructor = getNodeLinks(node.type).resolvedSymbol;
-            if (!promiseConstructor || !symbolIsValue(promiseConstructor)) {
-                var typeName = promiseConstructor
-                    ? symbolToString(promiseConstructor)
-                    : typeToString(promiseType);
-                error(node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName);
-                return unknownType;
-            }
-            checkReturnTypeAnnotationAsExpression(node);
-            var promiseConstructorType = getTypeOfSymbol(promiseConstructor);
-            if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) {
-                return unknownType;
-            }
-            var promiseName = ts.getEntityNameFromTypeNode(node.type);
-            var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName);
-            var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455);
-            if (rootSymbol) {
-                error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor));
-                return unknownType;
-            }
-            return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-        }
-        function checkDecorator(node) {
-            var signature = getResolvedSignature(node);
-            var returnType = getReturnTypeOfSignature(signature);
-            if (returnType.flags & 1) {
-                return;
-            }
-            var expectedReturnType;
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            var errorInfo;
-            switch (node.parent.kind) {
-                case 221:
-                    var classSymbol = getSymbolOfNode(node.parent);
-                    var classConstructorType = getTypeOfSymbol(classSymbol);
-                    expectedReturnType = getUnionType([classConstructorType, voidType]);
-                    break;
-                case 142:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 145:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 147:
-                case 149:
-                case 150:
-                    var methodType = getTypeOfNode(node.parent);
-                    var descriptorType = createTypedPropertyDescriptorType(methodType);
-                    expectedReturnType = getUnionType([descriptorType, voidType]);
-                    break;
-            }
-            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
-        }
-        function checkTypeNodeAsExpression(node) {
-            if (node && node.kind === 155) {
-                var root = getFirstIdentifier(node.typeName);
-                var meaning = root.parent.kind === 155 ? 793056 : 1536;
-                var rootSymbol = resolveName(root, root.text, meaning | 8388608, undefined, undefined);
-                if (rootSymbol && rootSymbol.flags & 8388608) {
-                    var aliasTarget = resolveAlias(rootSymbol);
-                    if (aliasTarget.flags & 107455 && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
-                        markAliasSymbolAsReferenced(rootSymbol);
-                    }
-                }
-            }
-        }
-        function checkTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        function checkReturnTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        function checkParameterTypeAnnotationsAsExpressions(node) {
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                checkTypeAnnotationAsExpression(parameter);
-            }
-        }
-        function checkDecorators(node) {
-            if (!node.decorators) {
-                return;
-            }
-            if (!ts.nodeCanBeDecorated(node)) {
-                return;
-            }
-            if (!compilerOptions.experimentalDecorators) {
-                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
-            }
-            if (compilerOptions.emitDecoratorMetadata) {
-                switch (node.kind) {
-                    case 221:
-                        var constructor = ts.getFirstConstructorWithBody(node);
-                        if (constructor) {
-                            checkParameterTypeAnnotationsAsExpressions(constructor);
-                        }
-                        break;
-                    case 147:
-                    case 149:
-                    case 150:
-                        checkParameterTypeAnnotationsAsExpressions(node);
-                        checkReturnTypeAnnotationAsExpression(node);
-                        break;
-                    case 145:
-                    case 142:
-                        checkTypeAnnotationAsExpression(node);
-                        break;
-                }
-            }
-            ts.forEach(node.decorators, checkDecorator);
-        }
-        function checkFunctionDeclaration(node) {
-            if (produceDiagnostics) {
-                checkFunctionOrMethodDeclaration(node) || checkGrammarForGenerator(node);
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-        }
-        function checkFunctionOrMethodDeclaration(node) {
-            checkDecorators(node);
-            checkSignatureDeclaration(node);
-            var isAsync = ts.isAsyncFunctionLike(node);
-            if (node.name && node.name.kind === 140) {
-                checkComputedPropertyName(node.name);
-            }
-            if (!ts.hasDynamicName(node)) {
-                var symbol = getSymbolOfNode(node);
-                var localSymbol = node.localSymbol || symbol;
-                var firstDeclaration = ts.forEach(localSymbol.declarations, function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
-                    declaration : undefined; });
-                if (node === firstDeclaration) {
-                    checkFunctionOrConstructorSymbol(localSymbol);
-                }
-                if (symbol.parent) {
-                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
-                        checkFunctionOrConstructorSymbol(symbol);
-                    }
-                }
-            }
-            checkSourceElement(node.body);
-            if (!node.asteriskToken) {
-                var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (produceDiagnostics && !node.type) {
-                if (compilerOptions.noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
-                    reportImplicitAnyError(node, anyType);
-                }
-                if (node.asteriskToken && ts.nodeIsPresent(node.body)) {
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
-                }
-            }
-        }
-        function checkBlock(node) {
-            if (node.kind === 199) {
-                checkGrammarStatementInAmbientContext(node);
-            }
-            ts.forEach(node.statements, checkSourceElement);
-        }
-        function checkCollisionWithArgumentsInGeneratedCode(node) {
-            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
-                return;
-            }
-            ts.forEach(node.parameters, function (p) {
-                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
-                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
-                }
-            });
-        }
-        function needCollisionCheckForIdentifier(node, identifier, name) {
-            if (!(identifier && identifier.text === name)) {
-                return false;
-            }
-            if (node.kind === 145 ||
-                node.kind === 144 ||
-                node.kind === 147 ||
-                node.kind === 146 ||
-                node.kind === 149 ||
-                node.kind === 150) {
-                return false;
-            }
-            if (ts.isInAmbientContext(node)) {
-                return false;
-            }
-            var root = ts.getRootDeclaration(node);
-            if (root.kind === 142 && ts.nodeIsMissing(root.parent.body)) {
-                return false;
-            }
-            return true;
-        }
-        function checkCollisionWithCapturedThisVariable(node, name) {
-            if (needCollisionCheckForIdentifier(node, name, "_this")) {
-                potentialThisCollisions.push(node);
-            }
-        }
-        function checkIfThisIsCapturedInEnclosingScope(node) {
-            var current = node;
-            while (current) {
-                if (getNodeCheckFlags(current) & 4) {
-                    var isDeclaration_1 = node.kind !== 69;
-                    if (isDeclaration_1) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
-                    }
-                    else {
-                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
-                    }
-                    return;
-                }
-                current = current.parent;
-            }
-        }
-        function checkCollisionWithCapturedSuperVariable(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
-                return;
-            }
-            var enclosingClass = ts.getContainingClass(node);
-            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
-                return;
-            }
-            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
-                var isDeclaration_2 = node.kind !== 69;
-                if (isDeclaration_2) {
-                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
-                }
-                else {
-                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
-                }
-            }
-        }
-        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
-                return;
-            }
-            if (node.kind === 225 && ts.getModuleInstanceState(node) !== 1) {
-                return;
-            }
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 && ts.isExternalOrCommonJsModule(parent)) {
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
-            }
-        }
-        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "Promise")) {
-                return;
-            }
-            if (node.kind === 225 && ts.getModuleInstanceState(node) !== 1) {
-                return;
-            }
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 && ts.isExternalOrCommonJsModule(parent) && parent.flags & 2097152) {
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
-            }
-        }
-        function checkVarDeclaredNamesNotShadowed(node) {
-            if ((ts.getCombinedNodeFlags(node) & 3072) !== 0 || ts.isParameterDeclaration(node)) {
-                return;
-            }
-            if (node.kind === 218 && !node.initializer) {
-                return;
-            }
-            var symbol = getSymbolOfNode(node);
-            if (symbol.flags & 1) {
-                var localDeclarationSymbol = resolveName(node, node.name.text, 3, undefined, undefined);
-                if (localDeclarationSymbol &&
-                    localDeclarationSymbol !== symbol &&
-                    localDeclarationSymbol.flags & 2) {
-                    if (getDeclarationFlagsFromSymbol(localDeclarationSymbol) & 3072) {
-                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 219);
-                        var container = varDeclList.parent.kind === 200 && varDeclList.parent.parent
-                            ? varDeclList.parent.parent
-                            : undefined;
-                        var namesShareScope = container &&
-                            (container.kind === 199 && ts.isFunctionLike(container.parent) ||
-                                container.kind === 226 ||
-                                container.kind === 225 ||
-                                container.kind === 256);
-                        if (!namesShareScope) {
-                            var name_16 = symbolToString(localDeclarationSymbol);
-                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_16, name_16);
-                        }
-                    }
-                }
-            }
-        }
-        function checkParameterInitializer(node) {
-            if (ts.getRootDeclaration(node).kind !== 142) {
-                return;
-            }
-            var func = ts.getContainingFunction(node);
-            visit(node.initializer);
-            function visit(n) {
-                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
-                    return;
-                }
-                if (n.kind === 172) {
-                    return visit(n.expression);
-                }
-                else if (n.kind === 69) {
-                    var symbol = resolveName(n, n.text, 107455 | 8388608, undefined, undefined);
-                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
-                        return;
-                    }
-                    if (symbol.valueDeclaration === node) {
-                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
-                        return;
-                    }
-                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (enclosingContainer === func) {
-                        if (symbol.valueDeclaration.kind === 142) {
-                            if (symbol.valueDeclaration.pos < node.pos) {
-                                return;
-                            }
-                            var current = n;
-                            while (current !== node.initializer) {
-                                if (ts.isFunctionLike(current.parent)) {
-                                    return;
-                                }
-                                if (current.parent.kind === 145 &&
-                                    !(current.parent.flags & 32) &&
-                                    ts.isClassLike(current.parent.parent)) {
-                                    return;
-                                }
-                                current = current.parent;
-                            }
-                        }
-                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
-                    }
-                }
-                else {
-                    return ts.forEachChild(n, visit);
-                }
-            }
-        }
-        function checkVariableLikeDeclaration(node) {
-            checkDecorators(node);
-            checkSourceElement(node.type);
-            if (node.name.kind === 140) {
-                checkComputedPropertyName(node.name);
-                if (node.initializer) {
-                    checkExpressionCached(node.initializer);
-                }
-            }
-            if (node.kind === 169) {
-                if (node.propertyName && node.propertyName.kind === 140) {
-                    checkComputedPropertyName(node.propertyName);
-                }
-                var parent_11 = node.parent.parent;
-                var parentType = getTypeForBindingElementParent(parent_11);
-                var name_17 = node.propertyName || node.name;
-                var property = getPropertyOfType(parentType, getTextOfPropertyName(name_17));
-                if (parent_11.initializer && property && getParentOfSymbol(property)) {
-                    checkClassPropertyAccess(parent_11, parent_11.initializer, parentType, property);
-                }
-            }
-            if (ts.isBindingPattern(node.name)) {
-                ts.forEach(node.name.elements, checkSourceElement);
-            }
-            if (node.initializer && ts.getRootDeclaration(node).kind === 142 && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
-                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
-                return;
-            }
-            if (ts.isBindingPattern(node.name)) {
-                if (node.initializer && node.parent.parent.kind !== 207) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, undefined);
-                    checkParameterInitializer(node);
-                }
-                return;
-            }
-            var symbol = getSymbolOfNode(node);
-            var type = getTypeOfVariableOrParameterOrProperty(symbol);
-            if (node === symbol.valueDeclaration) {
-                if (node.initializer && node.parent.parent.kind !== 207) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, undefined);
-                    checkParameterInitializer(node);
-                }
-            }
-            else {
-                var declarationType = getWidenedTypeForVariableLikeDeclaration(node);
-                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
-                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
-                }
-                if (node.initializer) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, undefined);
-                }
-                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
-                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
-                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
-                }
-            }
-            if (node.kind !== 145 && node.kind !== 144) {
-                checkExportsOnMergedDeclarations(node);
-                if (node.kind === 218 || node.kind === 169) {
-                    checkVarDeclaredNamesNotShadowed(node);
-                }
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-        }
-        function areDeclarationFlagsIdentical(left, right) {
-            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
-                return false;
-            }
-            var interestingFlags = 8 |
-                16 |
-                256 |
-                128 |
-                64 |
-                32;
-            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
-        }
-        function checkVariableDeclaration(node) {
-            checkGrammarVariableDeclaration(node);
-            return checkVariableLikeDeclaration(node);
-        }
-        function checkBindingElement(node) {
-            checkGrammarBindingElement(node);
-            return checkVariableLikeDeclaration(node);
-        }
-        function checkVariableStatement(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
-            ts.forEach(node.declarationList.declarations, checkSourceElement);
-        }
-        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
-            if (node.modifiers && node.parent.kind === 171) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    if (node.modifiers.length > 1) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                }
-                else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                }
-            }
-        }
-        function checkExpressionStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-        }
-        function checkIfStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.thenStatement);
-            if (node.thenStatement.kind === 201) {
-                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
-            }
-            checkSourceElement(node.elseStatement);
-        }
-        function checkDoStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkSourceElement(node.statement);
-            checkExpression(node.expression);
-        }
-        function checkWhileStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.statement);
-        }
-        function checkForStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.initializer && node.initializer.kind === 219) {
-                    checkGrammarVariableDeclarationList(node.initializer);
-                }
-            }
-            if (node.initializer) {
-                if (node.initializer.kind === 219) {
-                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
-                }
-                else {
-                    checkExpression(node.initializer);
-                }
-            }
-            if (node.condition)
-                checkExpression(node.condition);
-            if (node.incrementor)
-                checkExpression(node.incrementor);
-            checkSourceElement(node.statement);
-        }
-        function checkForOfStatement(node) {
-            checkGrammarForInOrForOfStatement(node);
-            if (node.initializer.kind === 219) {
-                checkForInOrForOfVariableDeclaration(node);
-            }
-            else {
-                var varExpr = node.initializer;
-                var iteratedType = checkRightHandSideOfForOf(node.expression);
-                if (varExpr.kind === 170 || varExpr.kind === 171) {
-                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
-                }
-                else {
-                    var leftType = checkExpression(varExpr);
-                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_of_statement, ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property);
-                    if (iteratedType) {
-                        checkTypeAssignableTo(iteratedType, leftType, varExpr, undefined);
-                    }
-                }
-            }
-            checkSourceElement(node.statement);
-        }
-        function checkForInStatement(node) {
-            checkGrammarForInOrForOfStatement(node);
-            if (node.initializer.kind === 219) {
-                var variable = node.initializer.declarations[0];
-                if (variable && ts.isBindingPattern(variable.name)) {
-                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
-                }
-                checkForInOrForOfVariableDeclaration(node);
-            }
-            else {
-                var varExpr = node.initializer;
-                var leftType = checkExpression(varExpr);
-                if (varExpr.kind === 170 || varExpr.kind === 171) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
-                }
-                else if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258)) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
-                }
-                else {
-                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_in_statement, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property);
-                }
-            }
-            var rightType = checkNonNullExpression(node.expression);
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 | 512)) {
-                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            checkSourceElement(node.statement);
-        }
-        function checkForInOrForOfVariableDeclaration(iterationStatement) {
-            var variableDeclarationList = iterationStatement.initializer;
-            if (variableDeclarationList.declarations.length >= 1) {
-                var decl = variableDeclarationList.declarations[0];
-                checkVariableDeclaration(decl);
-            }
-        }
-        function checkRightHandSideOfForOf(rhsExpression) {
-            var expressionType = checkNonNullExpression(rhsExpression);
-            return checkIteratedTypeOrElementType(expressionType, rhsExpression, true);
-        }
-        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput) {
-            if (isTypeAny(inputType)) {
-                return inputType;
-            }
-            if (languageVersion >= 2) {
-                return checkElementTypeOfIterable(inputType, errorNode);
-            }
-            if (allowStringInput) {
-                return checkElementTypeOfArrayOrString(inputType, errorNode);
-            }
-            if (isArrayLikeType(inputType)) {
-                var indexType = getIndexTypeOfType(inputType, 1);
-                if (indexType) {
-                    return indexType;
-                }
-            }
-            if (errorNode) {
-                error(errorNode, ts.Diagnostics.Type_0_is_not_an_array_type, typeToString(inputType));
-            }
-            return unknownType;
-        }
-        function checkElementTypeOfIterable(iterable, errorNode) {
-            var elementType = getElementTypeOfIterable(iterable, errorNode);
-            if (errorNode && elementType) {
-                checkTypeAssignableTo(iterable, createIterableType(elementType), errorNode);
-            }
-            return elementType || anyType;
-        }
-        function getElementTypeOfIterable(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            var typeAsIterable = type;
-            if (!typeAsIterable.iterableElementType) {
-                if ((type.flags & 4096) && type.target === getGlobalIterableType()) {
-                    typeAsIterable.iterableElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorFunction = getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator"));
-                    if (isTypeAny(iteratorFunction)) {
-                        return undefined;
-                    }
-                    var iteratorFunctionSignatures = iteratorFunction ? getSignaturesOfType(iteratorFunction, 0) : emptyArray;
-                    if (iteratorFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
-                        }
-                        return undefined;
-                    }
-                    typeAsIterable.iterableElementType = getElementTypeOfIterator(getUnionType(ts.map(iteratorFunctionSignatures, getReturnTypeOfSignature)), errorNode);
-                }
-            }
-            return typeAsIterable.iterableElementType;
-        }
-        function getElementTypeOfIterator(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            var typeAsIterator = type;
-            if (!typeAsIterator.iteratorElementType) {
-                if ((type.flags & 4096) && type.target === getGlobalIteratorType()) {
-                    typeAsIterator.iteratorElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorNextFunction = getTypeOfPropertyOfType(type, "next");
-                    if (isTypeAny(iteratorNextFunction)) {
-                        return undefined;
-                    }
-                    var iteratorNextFunctionSignatures = iteratorNextFunction ? getSignaturesOfType(iteratorNextFunction, 0) : emptyArray;
-                    if (iteratorNextFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.An_iterator_must_have_a_next_method);
-                        }
-                        return undefined;
-                    }
-                    var iteratorNextResult = getUnionType(ts.map(iteratorNextFunctionSignatures, getReturnTypeOfSignature));
-                    if (isTypeAny(iteratorNextResult)) {
-                        return undefined;
-                    }
-                    var iteratorNextValue = getTypeOfPropertyOfType(iteratorNextResult, "value");
-                    if (!iteratorNextValue) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
-                        }
-                        return undefined;
-                    }
-                    typeAsIterator.iteratorElementType = iteratorNextValue;
-                }
-            }
-            return typeAsIterator.iteratorElementType;
-        }
-        function getElementTypeOfIterableIterator(type) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            if ((type.flags & 4096) && type.target === getGlobalIterableIteratorType()) {
-                return type.typeArguments[0];
-            }
-            return getElementTypeOfIterable(type, undefined) ||
-                getElementTypeOfIterator(type, undefined);
-        }
-        function checkElementTypeOfArrayOrString(arrayOrStringType, errorNode) {
-            ts.Debug.assert(languageVersion < 2);
-            var arrayType = arrayOrStringType;
-            if (arrayOrStringType.flags & 16384) {
-                arrayType = getUnionType(ts.filter(arrayOrStringType.types, function (t) { return !(t.flags & 258); }));
-            }
-            else if (arrayOrStringType.flags & 258) {
-                arrayType = neverType;
-            }
-            var hasStringConstituent = arrayOrStringType !== arrayType;
-            var reportedError = false;
-            if (hasStringConstituent) {
-                if (languageVersion < 1) {
-                    error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
-                    reportedError = true;
-                }
-                if (arrayType === neverType) {
-                    return stringType;
-                }
-            }
-            if (!isArrayLikeType(arrayType)) {
-                if (!reportedError) {
-                    var diagnostic = hasStringConstituent
-                        ? ts.Diagnostics.Type_0_is_not_an_array_type
-                        : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
-                    error(errorNode, diagnostic, typeToString(arrayType));
-                }
-                return hasStringConstituent ? stringType : unknownType;
-            }
-            var arrayElementType = getIndexTypeOfType(arrayType, 1) || unknownType;
-            if (hasStringConstituent) {
-                if (arrayElementType.flags & 258) {
-                    return stringType;
-                }
-                return getUnionType([arrayElementType, stringType]);
-            }
-            return arrayElementType;
-        }
-        function checkBreakOrContinueStatement(node) {
-            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
-        }
-        function isGetAccessorWithAnnotatedSetAccessor(node) {
-            return !!(node.kind === 149 && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 150)));
-        }
-        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
-            var unwrappedReturnType = ts.isAsyncFunctionLike(func) ? getPromisedType(returnType) : returnType;
-            return maybeTypeOfKind(unwrappedReturnType, 16 | 1);
-        }
-        function checkReturnStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var functionBlock = ts.getContainingFunction(node);
-                if (!functionBlock) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
-                }
-            }
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var signature = getSignatureFromDeclaration(func);
-                var returnType = getReturnTypeOfSignature(signature);
-                if (strictNullChecks || node.expression || returnType === neverType) {
-                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
-                    if (func.asteriskToken) {
-                        return;
-                    }
-                    if (func.kind === 150) {
-                        if (node.expression) {
-                            error(node.expression, ts.Diagnostics.Setters_cannot_return_a_value);
-                        }
-                    }
-                    else if (func.kind === 148) {
-                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node.expression)) {
-                            error(node.expression, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
-                        }
-                    }
-                    else if (func.type || isGetAccessorWithAnnotatedSetAccessor(func)) {
-                        if (ts.isAsyncFunctionLike(func)) {
-                            var promisedType = getPromisedType(returnType);
-                            var awaitedType = checkAwaitedType(exprType, node.expression || node, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                            if (promisedType) {
-                                checkTypeAssignableTo(awaitedType, promisedType, node.expression || node);
-                            }
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnType, node.expression || node);
-                        }
-                    }
-                }
-                else if (func.kind !== 148 && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
-                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
-                }
-            }
-        }
-        function checkWithStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.flags & 33554432) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
-                }
-            }
-            checkExpression(node.expression);
-            error(node.expression, ts.Diagnostics.All_symbols_within_a_with_block_will_be_resolved_to_any);
-        }
-        function checkSwitchStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            var firstDefaultClause;
-            var hasDuplicateDefaultClause = false;
-            var expressionType = checkExpression(node.expression);
-            ts.forEach(node.caseBlock.clauses, function (clause) {
-                if (clause.kind === 250 && !hasDuplicateDefaultClause) {
-                    if (firstDefaultClause === undefined) {
-                        firstDefaultClause = clause;
-                    }
-                    else {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
-                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
-                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
-                        hasDuplicateDefaultClause = true;
-                    }
-                }
-                if (produceDiagnostics && clause.kind === 249) {
-                    var caseClause = clause;
-                    var caseType = checkExpression(caseClause.expression);
-                    if (!isTypeComparableTo(expressionType, caseType)) {
-                        checkTypeComparableTo(caseType, expressionType, caseClause.expression, undefined);
-                    }
-                }
-                ts.forEach(clause.statements, checkSourceElement);
-            });
-        }
-        function checkLabeledStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var current = node.parent;
-                while (current) {
-                    if (ts.isFunctionLike(current)) {
-                        break;
-                    }
-                    if (current.kind === 214 && current.label.text === node.label.text) {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
-                        break;
-                    }
-                    current = current.parent;
-                }
-            }
-            checkSourceElement(node.statement);
-        }
-        function checkThrowStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.expression === undefined) {
-                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
-                }
-            }
-            if (node.expression) {
-                checkExpression(node.expression);
-            }
-        }
-        function checkTryStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkBlock(node.tryBlock);
-            var catchClause = node.catchClause;
-            if (catchClause) {
-                if (catchClause.variableDeclaration) {
-                    if (catchClause.variableDeclaration.name.kind !== 69) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.name, ts.Diagnostics.Catch_clause_variable_name_must_be_an_identifier);
-                    }
-                    else if (catchClause.variableDeclaration.type) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
-                    }
-                    else if (catchClause.variableDeclaration.initializer) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
-                    }
-                    else {
-                        var identifierName = catchClause.variableDeclaration.name.text;
-                        var locals = catchClause.block.locals;
-                        if (locals && ts.hasProperty(locals, identifierName)) {
-                            var localSymbol = locals[identifierName];
-                            if (localSymbol && (localSymbol.flags & 2) !== 0) {
-                                grammarErrorOnNode(localSymbol.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, identifierName);
-                            }
-                        }
-                    }
-                }
-                checkBlock(catchClause.block);
-            }
-            if (node.finallyBlock) {
-                checkBlock(node.finallyBlock);
-            }
-        }
-        function checkIndexConstraints(type) {
-            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1);
-            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0);
-            var stringIndexType = getIndexTypeOfType(type, 0);
-            var numberIndexType = getIndexTypeOfType(type, 1);
-            if (stringIndexType || numberIndexType) {
-                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
-                    var propType = getTypeOfSymbol(prop);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1);
-                });
-                if (type.flags & 1024 && ts.isClassLike(type.symbol.valueDeclaration)) {
-                    var classDeclaration = type.symbol.valueDeclaration;
-                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
-                        var member = _a[_i];
-                        if (!(member.flags & 32) && ts.hasDynamicName(member)) {
-                            var propType = getTypeOfSymbol(member.symbol);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1);
-                        }
-                    }
-                }
-            }
-            var errorNode;
-            if (stringIndexType && numberIndexType) {
-                errorNode = declaredNumberIndexer || declaredStringIndexer;
-                if (!errorNode && (type.flags & 2048)) {
-                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0) && getIndexTypeOfType(base, 1); });
-                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
-                }
-            }
-            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
-                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
-            }
-            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
-                if (!indexType) {
-                    return;
-                }
-                if (indexKind === 1 && !isNumericName(prop.valueDeclaration.name)) {
-                    return;
-                }
-                var errorNode;
-                if (prop.valueDeclaration.name.kind === 140 || prop.parent === containingType.symbol) {
-                    errorNode = prop.valueDeclaration;
-                }
-                else if (indexDeclaration) {
-                    errorNode = indexDeclaration;
-                }
-                else if (containingType.flags & 2048) {
-                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
-                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
-                }
-                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
-                    var errorMessage = indexKind === 0
-                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
-                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
-                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
-                }
-            }
-        }
-        function checkTypeNameIsReserved(name, message) {
-            switch (name.text) {
-                case "any":
-                case "number":
-                case "boolean":
-                case "string":
-                case "symbol":
-                case "void":
-                    error(name, message, name.text);
-            }
-        }
-        function checkTypeParameters(typeParameterDeclarations) {
-            if (typeParameterDeclarations) {
-                for (var i = 0, n = typeParameterDeclarations.length; i < n; i++) {
-                    var node = typeParameterDeclarations[i];
-                    checkTypeParameter(node);
-                    if (produceDiagnostics) {
-                        for (var j = 0; j < i; j++) {
-                            if (typeParameterDeclarations[j].symbol === node.symbol) {
-                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        function checkTypeParameterListsIdentical(node, symbol) {
-            if (symbol.declarations.length === 1) {
-                return;
-            }
-            var firstDecl;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 221 || declaration.kind === 222) {
-                    if (!firstDecl) {
-                        firstDecl = declaration;
-                    }
-                    else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) {
-                        error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text);
-                    }
-                }
-            }
-        }
-        function checkClassExpression(node) {
-            checkClassLikeDeclaration(node);
-            checkNodeDeferred(node);
-            return getTypeOfSymbol(getSymbolOfNode(node));
-        }
-        function checkClassExpressionDeferred(node) {
-            ts.forEach(node.members, checkSourceElement);
-        }
-        function checkClassDeclaration(node) {
-            if (!node.name && !(node.flags & 512)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
-            }
-            checkClassLikeDeclaration(node);
-            ts.forEach(node.members, checkSourceElement);
-        }
-        function checkClassLikeDeclaration(node) {
-            checkGrammarClassDeclarationHeritageClauses(node);
-            checkDecorators(node);
-            if (node.name) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-            checkTypeParameters(node.typeParameters);
-            checkExportsOnMergedDeclarations(node);
-            var symbol = getSymbolOfNode(node);
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var typeWithThis = getTypeWithThisArgument(type);
-            var staticType = getTypeOfSymbol(symbol);
-            checkTypeParameterListsIdentical(node, symbol);
-            checkClassForDuplicateDeclarations(node);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                var baseTypes = getBaseTypes(type);
-                if (baseTypes.length && produceDiagnostics) {
-                    var baseType_1 = baseTypes[0];
-                    var staticBaseType = getBaseConstructorTypeOfClass(type);
-                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
-                    checkSourceElement(baseTypeNode.expression);
-                    if (baseTypeNode.typeArguments) {
-                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
-                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments); _i < _a.length; _i++) {
-                            var constructor = _a[_i];
-                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
-                                break;
-                            }
-                        }
-                    }
-                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
-                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
-                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32)) {
-                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
-                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
-                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
-                        }
-                    }
-                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
-                }
-            }
-            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
-            if (implementedTypeNodes) {
-                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
-                    var typeRefNode = implementedTypeNodes_1[_b];
-                    if (!ts.isSupportedExpressionWithTypeArguments(typeRefNode)) {
-                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
-                    }
-                    checkTypeReferenceNode(typeRefNode);
-                    if (produceDiagnostics) {
-                        var t = getTypeFromTypeNode(typeRefNode);
-                        if (t !== unknownType) {
-                            var declaredType = (t.flags & 4096) ? t.target : t;
-                            if (declaredType.flags & (1024 | 2048)) {
-                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
-                            }
-                            else {
-                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
-                            }
-                        }
-                    }
-                }
-            }
-            if (produceDiagnostics) {
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-            }
-        }
-        function checkBaseTypeAccessibility(type, node) {
-            var signatures = getSignaturesOfType(type, 1);
-            if (signatures.length) {
-                var declaration = signatures[0].declaration;
-                if (declaration && declaration.flags & 8) {
-                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
-                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
-                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, node.expression.text);
-                    }
-                }
-            }
-        }
-        function getTargetSymbol(s) {
-            return s.flags & 16777216 ? getSymbolLinks(s).target : s;
-        }
-        function getClassLikeDeclarationOfSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
-        }
-        function checkKindsOfPropertyMemberOverrides(type, baseType) {
-            var baseProperties = getPropertiesOfObjectType(baseType);
-            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
-                var baseProperty = baseProperties_1[_i];
-                var base = getTargetSymbol(baseProperty);
-                if (base.flags & 134217728) {
-                    continue;
-                }
-                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
-                var baseDeclarationFlags = getDeclarationFlagsFromSymbol(base);
-                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
-                if (derived) {
-                    if (derived === base) {
-                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
-                        if (baseDeclarationFlags & 128 && (!derivedClassDecl || !(derivedClassDecl.flags & 128))) {
-                            if (derivedClassDecl.kind === 192) {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
-                            }
-                            else {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
-                            }
-                        }
-                    }
-                    else {
-                        var derivedDeclarationFlags = getDeclarationFlagsFromSymbol(derived);
-                        if ((baseDeclarationFlags & 8) || (derivedDeclarationFlags & 8)) {
-                            continue;
-                        }
-                        if ((baseDeclarationFlags & 32) !== (derivedDeclarationFlags & 32)) {
-                            continue;
-                        }
-                        if ((base.flags & derived.flags & 8192) || ((base.flags & 98308) && (derived.flags & 98308))) {
-                            continue;
-                        }
-                        var errorMessage = void 0;
-                        if (base.flags & 8192) {
-                            if (derived.flags & 98304) {
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
-                            }
-                            else {
-                                ts.Debug.assert((derived.flags & 4) !== 0);
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
-                            }
-                        }
-                        else if (base.flags & 4) {
-                            ts.Debug.assert((derived.flags & 8192) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        else {
-                            ts.Debug.assert((base.flags & 98304) !== 0);
-                            ts.Debug.assert((derived.flags & 8192) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        error(derived.valueDeclaration.name, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
-                    }
-                }
-            }
-        }
-        function isAccessor(kind) {
-            return kind === 149 || kind === 150;
-        }
-        function areTypeParametersIdentical(list1, list2) {
-            if (!list1 && !list2) {
-                return true;
-            }
-            if (!list1 || !list2 || list1.length !== list2.length) {
-                return false;
-            }
-            for (var i = 0, len = list1.length; i < len; i++) {
-                var tp1 = list1[i];
-                var tp2 = list2[i];
-                if (tp1.name.text !== tp2.name.text) {
-                    return false;
-                }
-                if (!tp1.constraint && !tp2.constraint) {
-                    continue;
-                }
-                if (!tp1.constraint || !tp2.constraint) {
-                    return false;
-                }
-                if (!isTypeIdenticalTo(getTypeFromTypeNode(tp1.constraint), getTypeFromTypeNode(tp2.constraint))) {
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkInheritedPropertiesAreIdentical(type, typeNode) {
-            var baseTypes = getBaseTypes(type);
-            if (baseTypes.length < 2) {
-                return true;
-            }
-            var seen = {};
-            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen[p.name] = { prop: p, containingType: type }; });
-            var ok = true;
-            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
-                var base = baseTypes_2[_i];
-                var properties = getPropertiesOfObjectType(getTypeWithThisArgument(base, type.thisType));
-                for (var _a = 0, properties_4 = properties; _a < properties_4.length; _a++) {
-                    var prop = properties_4[_a];
-                    if (!ts.hasProperty(seen, prop.name)) {
-                        seen[prop.name] = { prop: prop, containingType: base };
-                    }
-                    else {
-                        var existing = seen[prop.name];
-                        var isInheritedProperty = existing.containingType !== type;
-                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
-                            ok = false;
-                            var typeName1 = typeToString(existing.containingType);
-                            var typeName2 = typeToString(base);
-                            var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
-                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
-                        }
-                    }
-                }
-            }
-            return ok;
-        }
-        function checkInterfaceDeclaration(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
-            checkTypeParameters(node.typeParameters);
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                checkTypeParameterListsIdentical(node, symbol);
-                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 222);
-                if (node === firstInterfaceDecl) {
-                    var type = getDeclaredTypeOfSymbol(symbol);
-                    var typeWithThis = getTypeWithThisArgument(type);
-                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
-                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
-                            var baseType = _a[_i];
-                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
-                        }
-                        checkIndexConstraints(type);
-                    }
-                }
-                checkObjectTypeForDuplicateDeclarations(node);
-            }
-            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
-                if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
-                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
-                }
-                checkTypeReferenceNode(heritageElement);
-            });
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                checkTypeForDuplicateIndexSignatures(node);
-            }
-        }
-        function checkTypeAliasDeclaration(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
-            checkSourceElement(node.type);
-        }
-        function computeEnumMemberValues(node) {
-            var nodeLinks = getNodeLinks(node);
-            if (!(nodeLinks.flags & 16384)) {
-                var enumSymbol = getSymbolOfNode(node);
-                var enumType = getDeclaredTypeOfSymbol(enumSymbol);
-                var autoValue = 0;
-                var ambient = ts.isInAmbientContext(node);
-                var enumIsConst = ts.isConst(node);
-                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                    var member = _a[_i];
-                    if (isComputedNonLiteralName(member.name)) {
-                        error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
-                    }
-                    else {
-                        var text = getTextOfPropertyName(member.name);
-                        if (isNumericLiteralName(text)) {
-                            error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
-                        }
-                    }
-                    var previousEnumMemberIsNonConstant = autoValue === undefined;
-                    var initializer = member.initializer;
-                    if (initializer) {
-                        autoValue = computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient);
-                    }
-                    else if (ambient && !enumIsConst) {
-                        autoValue = undefined;
-                    }
-                    else if (previousEnumMemberIsNonConstant) {
-                        error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
-                    }
-                    if (autoValue !== undefined) {
-                        getNodeLinks(member).enumMemberValue = autoValue;
-                        autoValue++;
-                    }
-                }
-                nodeLinks.flags |= 16384;
-            }
-            function computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient) {
-                var reportError = true;
-                var value = evalConstant(initializer);
-                if (reportError) {
-                    if (value === undefined) {
-                        if (enumIsConst) {
-                            error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else if (ambient) {
-                            error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else {
-                            checkTypeAssignableTo(checkExpression(initializer), enumType, initializer, undefined);
-                        }
-                    }
-                    else if (enumIsConst) {
-                        if (isNaN(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN);
-                        }
-                        else if (!isFinite(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
-                        }
-                    }
-                }
-                return value;
-                function evalConstant(e) {
-                    switch (e.kind) {
-                        case 185:
-                            var value_1 = evalConstant(e.operand);
-                            if (value_1 === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operator) {
-                                case 35: return value_1;
-                                case 36: return -value_1;
-                                case 50: return ~value_1;
-                            }
-                            return undefined;
-                        case 187:
-                            var left = evalConstant(e.left);
-                            if (left === undefined) {
-                                return undefined;
-                            }
-                            var right = evalConstant(e.right);
-                            if (right === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operatorToken.kind) {
-                                case 47: return left | right;
-                                case 46: return left & right;
-                                case 44: return left >> right;
-                                case 45: return left >>> right;
-                                case 43: return left << right;
-                                case 48: return left ^ right;
-                                case 37: return left * right;
-                                case 39: return left / right;
-                                case 35: return left + right;
-                                case 36: return left - right;
-                                case 40: return left % right;
-                            }
-                            return undefined;
-                        case 8:
-                            return +e.text;
-                        case 178:
-                            return evalConstant(e.expression);
-                        case 69:
-                        case 173:
-                        case 172:
-                            var member = initializer.parent;
-                            var currentType = getTypeOfSymbol(getSymbolOfNode(member.parent));
-                            var enumType_1;
-                            var propertyName = void 0;
-                            if (e.kind === 69) {
-                                enumType_1 = currentType;
-                                propertyName = e.text;
-                            }
-                            else {
-                                var expression = void 0;
-                                if (e.kind === 173) {
-                                    if (e.argumentExpression === undefined ||
-                                        e.argumentExpression.kind !== 9) {
-                                        return undefined;
-                                    }
-                                    expression = e.expression;
-                                    propertyName = e.argumentExpression.text;
-                                }
-                                else {
-                                    expression = e.expression;
-                                    propertyName = e.name.text;
-                                }
-                                var current = expression;
-                                while (current) {
-                                    if (current.kind === 69) {
-                                        break;
-                                    }
-                                    else if (current.kind === 172) {
-                                        current = current.expression;
-                                    }
-                                    else {
-                                        return undefined;
-                                    }
-                                }
-                                enumType_1 = checkExpression(expression);
-                                if (!(enumType_1.symbol && (enumType_1.symbol.flags & 384))) {
-                                    return undefined;
-                                }
-                            }
-                            if (propertyName === undefined) {
-                                return undefined;
-                            }
-                            var property = getPropertyOfObjectType(enumType_1, propertyName);
-                            if (!property || !(property.flags & 8)) {
-                                return undefined;
-                            }
-                            var propertyDecl = property.valueDeclaration;
-                            if (member === propertyDecl) {
-                                return undefined;
-                            }
-                            if (!isBlockScopedNameDeclaredBeforeUse(propertyDecl, member)) {
-                                reportError = false;
-                                error(e, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
-                                return undefined;
-                            }
-                            return getNodeLinks(propertyDecl).enumMemberValue;
-                    }
-                }
-            }
-        }
-        function checkEnumDeclaration(node) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkExportsOnMergedDeclarations(node);
-            computeEnumMemberValues(node);
-            var enumIsConst = ts.isConst(node);
-            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
-                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
-            }
-            var enumSymbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
-            if (node === firstDeclaration) {
-                if (enumSymbol.declarations.length > 1) {
-                    ts.forEach(enumSymbol.declarations, function (decl) {
-                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
-                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
-                        }
-                    });
-                }
-                var seenEnumMissingInitialInitializer_1 = false;
-                ts.forEach(enumSymbol.declarations, function (declaration) {
-                    if (declaration.kind !== 224) {
-                        return false;
-                    }
-                    var enumDeclaration = declaration;
-                    if (!enumDeclaration.members.length) {
-                        return false;
-                    }
-                    var firstEnumMember = enumDeclaration.members[0];
-                    if (!firstEnumMember.initializer) {
-                        if (seenEnumMissingInitialInitializer_1) {
-                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
-                        }
-                        else {
-                            seenEnumMissingInitialInitializer_1 = true;
-                        }
-                    }
-                });
-            }
-        }
-        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
-            var declarations = symbol.declarations;
-            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
-                var declaration = declarations_5[_i];
-                if ((declaration.kind === 221 ||
-                    (declaration.kind === 220 && ts.nodeIsPresent(declaration.body))) &&
-                    !ts.isInAmbientContext(declaration)) {
-                    return declaration;
-                }
-            }
-            return undefined;
-        }
-        function inSameLexicalScope(node1, node2) {
-            var container1 = ts.getEnclosingBlockScopeContainer(node1);
-            var container2 = ts.getEnclosingBlockScopeContainer(node2);
-            if (isGlobalSourceFile(container1)) {
-                return isGlobalSourceFile(container2);
-            }
-            else if (isGlobalSourceFile(container2)) {
-                return false;
-            }
-            else {
-                return container1 === container2;
-            }
-        }
-        function checkModuleDeclaration(node) {
-            if (produceDiagnostics) {
-                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
-                var inAmbientContext = ts.isInAmbientContext(node);
-                if (isGlobalAugmentation && !inAmbientContext) {
-                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
-                }
-                var isAmbientExternalModule = ts.isAmbientModule(node);
-                var contextErrorMessage = isAmbientExternalModule
-                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
-                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
-                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
-                    return;
-                }
-                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
-                    if (!inAmbientContext && node.name.kind === 9) {
-                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
-                    }
-                }
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                if (symbol.flags & 512
-                    && symbol.declarations.length > 1
-                    && !inAmbientContext
-                    && ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
-                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
-                    if (firstNonAmbientClassOrFunc) {
-                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
-                        }
-                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
-                        }
-                    }
-                    var mergedClass = ts.getDeclarationOfKind(symbol, 221);
-                    if (mergedClass &&
-                        inSameLexicalScope(node, mergedClass)) {
-                        getNodeLinks(node).flags |= 32768;
-                    }
-                }
-                if (isAmbientExternalModule) {
-                    if (ts.isExternalModuleAugmentation(node)) {
-                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432);
-                        if (checkBody) {
-                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
-                                var statement = _a[_i];
-                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
-                            }
-                        }
-                    }
-                    else if (isGlobalSourceFile(node.parent)) {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
-                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
-                        }
-                    }
-                    else {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else {
-                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
-                        }
-                    }
-                }
-            }
-            checkSourceElement(node.body);
-        }
-        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
-            switch (node.kind) {
-                case 200:
-                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
-                        var decl = _a[_i];
-                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
-                    }
-                    break;
-                case 235:
-                case 236:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
-                    break;
-                case 229:
-                case 230:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
-                    break;
-                case 169:
-                case 218:
-                    var name_18 = node.name;
-                    if (ts.isBindingPattern(name_18)) {
-                        for (var _b = 0, _c = name_18.elements; _b < _c.length; _b++) {
-                            var el = _c[_b];
-                            checkModuleAugmentationElement(el, isGlobalAugmentation);
-                        }
-                        break;
-                    }
-                case 221:
-                case 224:
-                case 220:
-                case 222:
-                case 225:
-                case 223:
-                    if (isGlobalAugmentation) {
-                        return;
-                    }
-                    var symbol = getSymbolOfNode(node);
-                    if (symbol) {
-                        var reportError = !(symbol.flags & 33554432);
-                        if (!reportError) {
-                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
-                        }
-                    }
-                    break;
-            }
-        }
-        function getFirstIdentifier(node) {
-            while (true) {
-                if (node.kind === 139) {
-                    node = node.left;
-                }
-                else if (node.kind === 172) {
-                    node = node.expression;
-                }
-                else {
-                    break;
-                }
-            }
-            ts.Debug.assert(node.kind === 69);
-            return node;
-        }
-        function checkExternalImportOrExportDeclaration(node) {
-            var moduleName = ts.getExternalModuleName(node);
-            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9) {
-                error(moduleName, ts.Diagnostics.String_literal_expected);
-                return false;
-            }
-            var inAmbientExternalModule = node.parent.kind === 226 && ts.isAmbientModule(node.parent.parent);
-            if (node.parent.kind !== 256 && !inAmbientExternalModule) {
-                error(moduleName, node.kind === 236 ?
-                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
-                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
-                return false;
-            }
-            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
-                if (!isTopLevelInExternalModuleAugmentation(node)) {
-                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkAliasSymbol(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target !== unknownSymbol) {
-                var excludedMeanings = (symbol.flags & (107455 | 1048576) ? 107455 : 0) |
-                    (symbol.flags & 793056 ? 793056 : 0) |
-                    (symbol.flags & 1536 ? 1536 : 0);
-                if (target.flags & excludedMeanings) {
-                    var message = node.kind === 238 ?
-                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
-                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
-                    error(node, message, symbolToString(symbol));
-                }
-            }
-        }
-        function checkImportBinding(node) {
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkAliasSymbol(node);
-        }
-        function checkImportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
-            }
-            if (checkExternalImportOrExportDeclaration(node)) {
-                var importClause = node.importClause;
-                if (importClause) {
-                    if (importClause.name) {
-                        checkImportBinding(importClause);
-                    }
-                    if (importClause.namedBindings) {
-                        if (importClause.namedBindings.kind === 232) {
-                            checkImportBinding(importClause.namedBindings);
-                        }
-                        else {
-                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
-                        }
-                    }
-                }
-            }
-        }
-        function checkImportEqualsDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                return;
-            }
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
-                checkImportBinding(node);
-                if (node.flags & 1) {
-                    markExportAsReferenced(node);
-                }
-                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    var target = resolveAlias(getSymbolOfNode(node));
-                    if (target !== unknownSymbol) {
-                        if (target.flags & 107455) {
-                            var moduleName = getFirstIdentifier(node.moduleReference);
-                            if (!(resolveEntityName(moduleName, 107455 | 1536).flags & 1536)) {
-                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
-                            }
-                        }
-                        if (target.flags & 793056) {
-                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
-                        }
-                    }
-                }
-                else {
-                    if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
-                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
-                    }
-                }
-            }
-        }
-        function checkExportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
-            }
-            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
-                if (node.exportClause) {
-                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
-                    var inAmbientExternalModule = node.parent.kind === 226 && ts.isAmbientModule(node.parent.parent);
-                    if (node.parent.kind !== 256 && !inAmbientExternalModule) {
-                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
-                    }
-                }
-                else {
-                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
-                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
-                    }
-                }
-            }
-        }
-        function checkGrammarModuleElementContext(node, errorMessage) {
-            if (node.parent.kind !== 256 && node.parent.kind !== 226 && node.parent.kind !== 225) {
-                return grammarErrorOnFirstToken(node, errorMessage);
-            }
-        }
-        function checkExportSpecifier(node) {
-            checkAliasSymbol(node);
-            if (!node.parent.parent.moduleSpecifier) {
-                var exportedName = node.propertyName || node.name;
-                var symbol = resolveName(exportedName, exportedName.text, 107455 | 793056 | 1536 | 8388608, undefined, undefined);
-                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
-                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
-                }
-                else {
-                    markExportAsReferenced(node);
-                }
-            }
-        }
-        function checkExportAssignment(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
-                return;
-            }
-            var container = node.parent.kind === 256 ? node.parent : node.parent.parent;
-            if (container.kind === 225 && !ts.isAmbientModule(container)) {
-                error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
-            }
-            if (node.expression.kind === 69) {
-                markExportAsReferenced(node);
-            }
-            else {
-                checkExpressionCached(node.expression);
-            }
-            checkExternalModuleExports(container);
-            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
-                if (modulekind === ts.ModuleKind.ES6) {
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
-                }
-                else if (modulekind === ts.ModuleKind.System) {
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
-                }
-            }
-        }
-        function hasExportedMembers(moduleSymbol) {
-            for (var id in moduleSymbol.exports) {
-                if (id !== "export=") {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function checkExternalModuleExports(node) {
-            var moduleSymbol = getSymbolOfNode(node);
-            var links = getSymbolLinks(moduleSymbol);
-            if (!links.exportsChecked) {
-                var exportEqualsSymbol = moduleSymbol.exports["export="];
-                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
-                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
-                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
-                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
-                    }
-                }
-                var exports = getExportsOfModule(moduleSymbol);
-                for (var id in exports) {
-                    if (id === "__export") {
-                        continue;
-                    }
-                    var _a = exports[id], declarations = _a.declarations, flags = _a.flags;
-                    if (flags & (1536 | 64 | 384)) {
-                        continue;
-                    }
-                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
-                    if (flags & 524288 && exportedDeclarationsCount <= 2) {
-                        continue;
-                    }
-                    if (exportedDeclarationsCount > 1) {
-                        for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
-                            var declaration = declarations_6[_i];
-                            if (isNotOverload(declaration)) {
-                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
-                            }
-                        }
-                    }
-                }
-                links.exportsChecked = true;
-            }
-            function isNotOverload(declaration) {
-                return declaration.kind !== 220 || !!declaration.body;
-            }
-        }
-        function checkSourceElement(node) {
-            if (!node) {
-                return;
-            }
-            var kind = node.kind;
-            if (cancellationToken) {
-                switch (kind) {
-                    case 225:
-                    case 221:
-                    case 222:
-                    case 220:
-                        cancellationToken.throwIfCancellationRequested();
-                }
-            }
-            switch (kind) {
-                case 141:
-                    return checkTypeParameter(node);
-                case 142:
-                    return checkParameter(node);
-                case 145:
-                case 144:
-                    return checkPropertyDeclaration(node);
-                case 156:
-                case 157:
-                case 151:
-                case 152:
-                    return checkSignatureDeclaration(node);
-                case 153:
-                    return checkSignatureDeclaration(node);
-                case 147:
-                case 146:
-                    return checkMethodDeclaration(node);
-                case 148:
-                    return checkConstructorDeclaration(node);
-                case 149:
-                case 150:
-                    return checkAccessorDeclaration(node);
-                case 155:
-                    return checkTypeReferenceNode(node);
-                case 154:
-                    return checkTypePredicate(node);
-                case 158:
-                    return checkTypeQuery(node);
-                case 159:
-                    return checkTypeLiteral(node);
-                case 160:
-                    return checkArrayType(node);
-                case 161:
-                    return checkTupleType(node);
-                case 162:
-                case 163:
-                    return checkUnionOrIntersectionType(node);
-                case 164:
-                    return checkSourceElement(node.type);
-                case 220:
-                    return checkFunctionDeclaration(node);
-                case 199:
-                case 226:
-                    return checkBlock(node);
-                case 200:
-                    return checkVariableStatement(node);
-                case 202:
-                    return checkExpressionStatement(node);
-                case 203:
-                    return checkIfStatement(node);
-                case 204:
-                    return checkDoStatement(node);
-                case 205:
-                    return checkWhileStatement(node);
-                case 206:
-                    return checkForStatement(node);
-                case 207:
-                    return checkForInStatement(node);
-                case 208:
-                    return checkForOfStatement(node);
-                case 209:
-                case 210:
-                    return checkBreakOrContinueStatement(node);
-                case 211:
-                    return checkReturnStatement(node);
-                case 212:
-                    return checkWithStatement(node);
-                case 213:
-                    return checkSwitchStatement(node);
-                case 214:
-                    return checkLabeledStatement(node);
-                case 215:
-                    return checkThrowStatement(node);
-                case 216:
-                    return checkTryStatement(node);
-                case 218:
-                    return checkVariableDeclaration(node);
-                case 169:
-                    return checkBindingElement(node);
-                case 221:
-                    return checkClassDeclaration(node);
-                case 222:
-                    return checkInterfaceDeclaration(node);
-                case 223:
-                    return checkTypeAliasDeclaration(node);
-                case 224:
-                    return checkEnumDeclaration(node);
-                case 225:
-                    return checkModuleDeclaration(node);
-                case 230:
-                    return checkImportDeclaration(node);
-                case 229:
-                    return checkImportEqualsDeclaration(node);
-                case 236:
-                    return checkExportDeclaration(node);
-                case 235:
-                    return checkExportAssignment(node);
-                case 201:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 217:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 239:
-                    return checkMissingDeclaration(node);
-            }
-        }
-        function checkNodeDeferred(node) {
-            if (deferredNodes) {
-                deferredNodes.push(node);
-            }
-        }
-        function checkDeferredNodes() {
-            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
-                var node = deferredNodes_1[_i];
-                switch (node.kind) {
-                    case 179:
-                    case 180:
-                    case 147:
-                    case 146:
-                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
-                        break;
-                    case 149:
-                    case 150:
-                        checkAccessorDeferred(node);
-                        break;
-                    case 192:
-                        checkClassExpressionDeferred(node);
-                        break;
-                }
-            }
-        }
-        function checkSourceFile(node) {
-            var start = new Date().getTime();
-            checkSourceFileWorker(node);
-            ts.checkTime += new Date().getTime() - start;
-        }
-        function checkSourceFileWorker(node) {
-            var links = getNodeLinks(node);
-            if (!(links.flags & 1)) {
-                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
-                    return;
-                }
-                checkGrammarSourceFile(node);
-                potentialThisCollisions.length = 0;
-                deferredNodes = [];
-                ts.forEach(node.statements, checkSourceElement);
-                checkDeferredNodes();
-                deferredNodes = undefined;
-                if (ts.isExternalOrCommonJsModule(node)) {
-                    checkExternalModuleExports(node);
-                }
-                if (potentialThisCollisions.length) {
-                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
-                    potentialThisCollisions.length = 0;
-                }
-                links.flags |= 1;
-            }
-        }
-        function getDiagnostics(sourceFile, ct) {
-            try {
-                cancellationToken = ct;
-                return getDiagnosticsWorker(sourceFile);
-            }
-            finally {
-                cancellationToken = undefined;
-            }
-        }
-        function getDiagnosticsWorker(sourceFile) {
-            throwIfNonDiagnosticsProducing();
-            if (sourceFile) {
-                checkSourceFile(sourceFile);
-                return diagnostics.getDiagnostics(sourceFile.fileName);
-            }
-            ts.forEach(host.getSourceFiles(), checkSourceFile);
-            return diagnostics.getDiagnostics();
-        }
-        function getGlobalDiagnostics() {
-            throwIfNonDiagnosticsProducing();
-            return diagnostics.getGlobalDiagnostics();
-        }
-        function throwIfNonDiagnosticsProducing() {
-            if (!produceDiagnostics) {
-                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
-            }
-        }
-        function isInsideWithStatementBody(node) {
-            if (node) {
-                while (node.parent) {
-                    if (node.parent.kind === 212 && node.parent.statement === node) {
-                        return true;
-                    }
-                    node = node.parent;
-                }
-            }
-            return false;
-        }
-        function getSymbolsInScope(location, meaning) {
-            var symbols = {};
-            var memberFlags = 0;
-            if (isInsideWithStatementBody(location)) {
-                return [];
-            }
-            populateSymbols();
-            return symbolsToArray(symbols);
-            function populateSymbols() {
-                while (location) {
-                    if (location.locals && !isGlobalSourceFile(location)) {
-                        copySymbols(location.locals, meaning);
-                    }
-                    switch (location.kind) {
-                        case 256:
-                            if (!ts.isExternalOrCommonJsModule(location)) {
-                                break;
-                            }
-                        case 225:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931);
-                            break;
-                        case 224:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8);
-                            break;
-                        case 192:
-                            var className = location.name;
-                            if (className) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                        case 221:
-                        case 222:
-                            if (!(memberFlags & 32)) {
-                                copySymbols(getSymbolOfNode(location).members, meaning & 793056);
-                            }
-                            break;
-                        case 179:
-                            var funcName = location.name;
-                            if (funcName) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                            break;
-                    }
-                    if (ts.introducesArgumentsExoticObject(location)) {
-                        copySymbol(argumentsSymbol, meaning);
-                    }
-                    memberFlags = location.flags;
-                    location = location.parent;
-                }
-                copySymbols(globals, meaning);
-            }
-            function copySymbol(symbol, meaning) {
-                if (symbol.flags & meaning) {
-                    var id = symbol.name;
-                    if (!ts.hasProperty(symbols, id)) {
-                        symbols[id] = symbol;
-                    }
-                }
-            }
-            function copySymbols(source, meaning) {
-                if (meaning) {
-                    for (var id in source) {
-                        var symbol = source[id];
-                        copySymbol(symbol, meaning);
-                    }
-                }
-            }
-        }
-        function isTypeDeclarationName(name) {
-            return name.kind === 69 &&
-                isTypeDeclaration(name.parent) &&
-                name.parent.name === name;
-        }
-        function isTypeDeclaration(node) {
-            switch (node.kind) {
-                case 141:
-                case 221:
-                case 222:
-                case 223:
-                case 224:
-                    return true;
-            }
-        }
-        function isTypeReferenceIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 139) {
-                node = node.parent;
-            }
-            return node.parent && node.parent.kind === 155;
-        }
-        function isHeritageClauseElementIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 172) {
-                node = node.parent;
-            }
-            return node.parent && node.parent.kind === 194;
-        }
-        function forEachEnclosingClass(node, callback) {
-            var result;
-            while (true) {
-                node = ts.getContainingClass(node);
-                if (!node)
-                    break;
-                if (result = callback(node))
-                    break;
-            }
-            return result;
-        }
-        function isNodeWithinClass(node, classDeclaration) {
-            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
-        }
-        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
-            while (nodeOnRightSide.parent.kind === 139) {
-                nodeOnRightSide = nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 229) {
-                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 235) {
-                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
-            }
-            return undefined;
-        }
-        function isInRightSideOfImportOrExportAssignment(node) {
-            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
-        }
-        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
-            if (ts.isDeclarationName(entityName)) {
-                return getSymbolOfNode(entityName.parent);
-            }
-            if (ts.isInJavaScriptFile(entityName) && entityName.parent.kind === 172) {
-                var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
-                switch (specialPropertyAssignmentKind) {
-                    case 1:
-                    case 3:
-                        return getSymbolOfNode(entityName.parent);
-                    case 4:
-                    case 2:
-                        return getSymbolOfNode(entityName.parent.parent);
-                    default:
-                }
-            }
-            if (entityName.parent.kind === 235) {
-                return resolveEntityName(entityName, 107455 | 793056 | 1536 | 8388608);
-            }
-            if (entityName.kind !== 172) {
-                if (isInRightSideOfImportOrExportAssignment(entityName)) {
-                    return getSymbolOfPartOfRightHandSideOfImportEquals(entityName);
-                }
-            }
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
-            }
-            if (isHeritageClauseElementIdentifier(entityName)) {
-                var meaning = 0;
-                if (entityName.parent.kind === 194) {
-                    meaning = 793056;
-                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                        meaning |= 107455;
-                    }
-                }
-                else {
-                    meaning = 1536;
-                }
-                meaning |= 8388608;
-                return resolveEntityName(entityName, meaning);
-            }
-            else if (ts.isExpression(entityName)) {
-                if (ts.nodeIsMissing(entityName)) {
-                    return undefined;
-                }
-                if (entityName.kind === 69) {
-                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
-                        return getIntrinsicTagSymbol(entityName.parent);
-                    }
-                    var meaning = 107455 | 8388608;
-                    return resolveEntityName(entityName, meaning);
-                }
-                else if (entityName.kind === 172) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkPropertyAccessExpression(entityName);
-                    }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
-                else if (entityName.kind === 139) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkQualifiedName(entityName);
-                    }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
-            }
-            else if (isTypeReferenceIdentifier(entityName)) {
-                var meaning = entityName.parent.kind === 155 ? 793056 : 1536;
-                meaning |= 8388608;
-                return resolveEntityName(entityName, meaning);
-            }
-            else if (entityName.parent.kind === 246) {
-                return getJsxAttributePropertySymbol(entityName.parent);
-            }
-            if (entityName.parent.kind === 154) {
-                return resolveEntityName(entityName, 1);
-            }
-            return undefined;
-        }
-        function getSymbolAtLocation(node) {
-            if (node.kind === 256) {
-                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
-            }
-            if (isInsideWithStatementBody(node)) {
-                return undefined;
-            }
-            if (ts.isDeclarationName(node)) {
-                return getSymbolOfNode(node.parent);
-            }
-            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
-                return getSymbolOfNode(node.parent.parent);
-            }
-            if (node.kind === 69) {
-                if (isInRightSideOfImportOrExportAssignment(node)) {
-                    return node.parent.kind === 235
-                        ? getSymbolOfEntityNameOrPropertyAccessExpression(node)
-                        : getSymbolOfPartOfRightHandSideOfImportEquals(node);
-                }
-                else if (node.parent.kind === 169 &&
-                    node.parent.parent.kind === 167 &&
-                    node === node.parent.propertyName) {
-                    var typeOfPattern = getTypeOfNode(node.parent.parent);
-                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
-                    if (propertyDeclaration) {
-                        return propertyDeclaration;
-                    }
-                }
-            }
-            switch (node.kind) {
-                case 69:
-                case 172:
-                case 139:
-                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
-                case 97:
-                case 95:
-                    var type = ts.isExpression(node) ? checkExpression(node) : getTypeFromTypeNode(node);
-                    return type.symbol;
-                case 165:
-                    return getTypeFromTypeNode(node).symbol;
-                case 121:
-                    var constructorDeclaration = node.parent;
-                    if (constructorDeclaration && constructorDeclaration.kind === 148) {
-                        return constructorDeclaration.parent.symbol;
-                    }
-                    return undefined;
-                case 9:
-                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
-                        ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
-                        ((node.parent.kind === 230 || node.parent.kind === 236) &&
-                            node.parent.moduleSpecifier === node)) {
-                        return resolveExternalModuleName(node, node);
-                    }
-                case 8:
-                    if (node.parent.kind === 173 && node.parent.argumentExpression === node) {
-                        var objectType = checkExpression(node.parent.expression);
-                        if (objectType === unknownType)
-                            return undefined;
-                        var apparentType = getApparentType(objectType);
-                        if (apparentType === unknownType)
-                            return undefined;
-                        return getPropertyOfType(apparentType, node.text);
-                    }
-                    break;
-            }
-            return undefined;
-        }
-        function getShorthandAssignmentValueSymbol(location) {
-            if (location && location.kind === 254) {
-                return resolveEntityName(location.name, 107455 | 8388608);
-            }
-            return undefined;
-        }
-        function getExportSpecifierLocalTargetSymbol(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 | 793056 | 1536 | 8388608);
-        }
-        function getTypeOfNode(node) {
-            if (isInsideWithStatementBody(node)) {
-                return unknownType;
-            }
-            if (ts.isTypeNode(node)) {
-                return getTypeFromTypeNode(node);
-            }
-            if (ts.isExpression(node)) {
-                return getTypeOfExpression(node);
-            }
-            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
-                return getBaseTypes(getDeclaredTypeOfSymbol(getSymbolOfNode(node.parent.parent)))[0];
-            }
-            if (isTypeDeclaration(node)) {
-                var symbol = getSymbolOfNode(node);
-                return getDeclaredTypeOfSymbol(symbol);
-            }
-            if (isTypeDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getDeclaredTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclaration(node)) {
-                var symbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getTypeOfSymbol(symbol);
-            }
-            if (ts.isBindingPattern(node)) {
-                return getTypeForVariableLikeDeclaration(node.parent, true);
-            }
-            if (isInRightSideOfImportOrExportAssignment(node)) {
-                var symbol = getSymbolAtLocation(node);
-                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
-                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
-            }
-            return unknownType;
-        }
-        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
-            ts.Debug.assert(expr.kind === 171 || expr.kind === 170);
-            if (expr.parent.kind === 208) {
-                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
-            }
-            if (expr.parent.kind === 187) {
-                var iteratedType = checkExpression(expr.parent.right);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
-            }
-            if (expr.parent.kind === 253) {
-                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
-                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
-            }
-            ts.Debug.assert(expr.parent.kind === 170);
-            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
-            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, false) || unknownType;
-            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
-        }
-        function getPropertySymbolOfDestructuringAssignment(location) {
-            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
-            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
-        }
-        function getTypeOfExpression(expr) {
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
-                expr = expr.parent;
-            }
-            return checkExpression(expr);
-        }
-        function getParentTypeOfClassElement(node) {
-            var classSymbol = getSymbolOfNode(node.parent);
-            return node.flags & 32
-                ? getTypeOfSymbol(classSymbol)
-                : getDeclaredTypeOfSymbol(classSymbol);
-        }
-        function getAugmentedPropertiesOfType(type) {
-            type = getApparentType(type);
-            var propsByName = createSymbolTable(getPropertiesOfType(type));
-            if (getSignaturesOfType(type, 0).length || getSignaturesOfType(type, 1).length) {
-                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
-                    if (!ts.hasProperty(propsByName, p.name)) {
-                        propsByName[p.name] = p;
-                    }
-                });
-            }
-            return getNamedMembers(propsByName);
-        }
-        function getRootSymbols(symbol) {
-            if (symbol.flags & 268435456) {
-                var symbols_3 = [];
-                var name_19 = symbol.name;
-                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
-                    var symbol = getPropertyOfType(t, name_19);
-                    if (symbol) {
-                        symbols_3.push(symbol);
-                    }
-                });
-                return symbols_3;
-            }
-            else if (symbol.flags & 67108864) {
-                var target = void 0;
-                var next = symbol;
-                while (next = getSymbolLinks(next).target) {
-                    target = next;
-                }
-                if (target) {
-                    return [target];
-                }
-            }
-            return [symbol];
-        }
-        function isArgumentsLocalBinding(node) {
-            return getReferencedValueSymbol(node) === argumentsSymbol;
-        }
-        function moduleExportsSomeValue(moduleReferenceExpression) {
-            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
-            if (!moduleSymbol) {
-                return true;
-            }
-            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
-            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
-            var symbolLinks = getSymbolLinks(moduleSymbol);
-            if (symbolLinks.exportsSomeValue === undefined) {
-                symbolLinks.exportsSomeValue = hasExportAssignment
-                    ? !!(moduleSymbol.flags & 107455)
-                    : ts.forEachValue(getExportsOfModule(moduleSymbol), isValue);
-            }
-            return symbolLinks.exportsSomeValue;
-            function isValue(s) {
-                s = resolveSymbol(s);
-                return s && !!(s.flags & 107455);
-            }
-        }
-        function getReferencedExportContainer(node) {
-            var symbol = getReferencedValueSymbol(node);
-            if (symbol) {
-                if (symbol.flags & 1048576) {
-                    var exportSymbol = getMergedSymbol(symbol.exportSymbol);
-                    if (exportSymbol.flags & 944) {
-                        return undefined;
-                    }
-                    symbol = exportSymbol;
-                }
-                var parentSymbol = getParentOfSymbol(symbol);
-                if (parentSymbol) {
-                    if (parentSymbol.flags & 512 && parentSymbol.valueDeclaration.kind === 256) {
-                        return parentSymbol.valueDeclaration;
-                    }
-                    for (var n = node.parent; n; n = n.parent) {
-                        if ((n.kind === 225 || n.kind === 224) && getSymbolOfNode(n) === parentSymbol) {
-                            return n;
-                        }
-                    }
-                }
-            }
-        }
-        function getReferencedImportDeclaration(node) {
-            var symbol = getReferencedValueSymbol(node);
-            return symbol && symbol.flags & 8388608 ? getDeclarationOfAliasSymbol(symbol) : undefined;
-        }
-        function isSymbolOfDeclarationWithCollidingName(symbol) {
-            if (symbol.flags & 418) {
-                var links = getSymbolLinks(symbol);
-                if (links.isDeclarationWithCollidingName === undefined) {
-                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (ts.isStatementWithLocals(container)) {
-                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
-                        if (!!resolveName(container.parent, symbol.name, 107455, undefined, undefined)) {
-                            links.isDeclarationWithCollidingName = true;
-                        }
-                        else if (nodeLinks_1.flags & 131072) {
-                            var isDeclaredInLoop = nodeLinks_1.flags & 262144;
-                            var inLoopInitializer = ts.isIterationStatement(container, false);
-                            var inLoopBodyBlock = container.kind === 199 && ts.isIterationStatement(container.parent, false);
-                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
-                        }
-                        else {
-                            links.isDeclarationWithCollidingName = false;
-                        }
-                    }
-                }
-                return links.isDeclarationWithCollidingName;
-            }
-            return false;
-        }
-        function getReferencedDeclarationWithCollidingName(node) {
-            var symbol = getReferencedValueSymbol(node);
-            return symbol && isSymbolOfDeclarationWithCollidingName(symbol) ? symbol.valueDeclaration : undefined;
-        }
-        function isDeclarationWithCollidingName(node) {
-            return isSymbolOfDeclarationWithCollidingName(getSymbolOfNode(node));
-        }
-        function isValueAliasDeclaration(node) {
-            switch (node.kind) {
-                case 229:
-                case 231:
-                case 232:
-                case 234:
-                case 238:
-                    return isAliasResolvedToValue(getSymbolOfNode(node));
-                case 236:
-                    var exportClause = node.exportClause;
-                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
-                case 235:
-                    return node.expression && node.expression.kind === 69 ? isAliasResolvedToValue(getSymbolOfNode(node)) : true;
-            }
-            return false;
-        }
-        function isTopLevelValueImportEqualsWithEntityName(node) {
-            if (node.parent.kind !== 256 || !ts.isInternalModuleImportEqualsDeclaration(node)) {
-                return false;
-            }
-            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
-            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
-        }
-        function isAliasResolvedToValue(symbol) {
-            var target = resolveAlias(symbol);
-            if (target === unknownSymbol) {
-                return true;
-            }
-            return target.flags & 107455 &&
-                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
-        }
-        function isConstEnumOrConstEnumOnlyModule(s) {
-            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
-        }
-        function isReferencedAliasDeclaration(node, checkChildren) {
-            if (ts.isAliasSymbolDeclaration(node)) {
-                var symbol = getSymbolOfNode(node);
-                if (getSymbolLinks(symbol).referenced) {
-                    return true;
-                }
-            }
-            if (checkChildren) {
-                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
-            }
-            return false;
-        }
-        function isImplementationOfOverload(node) {
-            if (ts.nodeIsPresent(node.body)) {
-                var symbol = getSymbolOfNode(node);
-                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
-                return signaturesOfSymbol.length > 1 ||
-                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
-            }
-            return false;
-        }
-        function getNodeCheckFlags(node) {
-            return getNodeLinks(node).flags;
-        }
-        function getEnumMemberValue(node) {
-            computeEnumMemberValues(node.parent);
-            return getNodeLinks(node).enumMemberValue;
-        }
-        function getConstantValue(node) {
-            if (node.kind === 255) {
-                return getEnumMemberValue(node);
-            }
-            var symbol = getNodeLinks(node).resolvedSymbol;
-            if (symbol && (symbol.flags & 8)) {
-                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
-                    return getEnumMemberValue(symbol.valueDeclaration);
-                }
-            }
-            return undefined;
-        }
-        function isFunctionType(type) {
-            return type.flags & 80896 && getSignaturesOfType(type, 0).length > 0;
-        }
-        function getTypeReferenceSerializationKind(typeName) {
-            var valueSymbol = resolveEntityName(typeName, 107455, true);
-            var constructorType = valueSymbol ? getTypeOfSymbol(valueSymbol) : undefined;
-            if (constructorType && isConstructorType(constructorType)) {
-                return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
-            }
-            var typeSymbol = resolveEntityName(typeName, 793056, true);
-            if (!typeSymbol) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            var type = getDeclaredTypeOfSymbol(typeSymbol);
-            if (type === unknownType) {
-                return ts.TypeReferenceSerializationKind.Unknown;
-            }
-            else if (type.flags & 1) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            else if (isTypeOfKind(type, 16)) {
-                return ts.TypeReferenceSerializationKind.VoidType;
-            }
-            else if (isTypeOfKind(type, 8)) {
-                return ts.TypeReferenceSerializationKind.BooleanType;
-            }
-            else if (isTypeOfKind(type, 132)) {
-                return ts.TypeReferenceSerializationKind.NumberLikeType;
-            }
-            else if (isTypeOfKind(type, 258)) {
-                return ts.TypeReferenceSerializationKind.StringLikeType;
-            }
-            else if (isTypeOfKind(type, 8192)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
-            }
-            else if (isTypeOfKind(type, 16777216)) {
-                return ts.TypeReferenceSerializationKind.ESSymbolType;
-            }
-            else if (isFunctionType(type)) {
-                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
-            }
-            else if (isArrayType(type)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
-            }
-            else {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-        }
-        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
-            var symbol = getSymbolOfNode(declaration);
-            var type = symbol && !(symbol.flags & (2048 | 131072))
-                ? getTypeOfSymbol(symbol)
-                : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
-            var signature = getSignatureFromDeclaration(signatureDeclaration);
-            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
-        }
-        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
-            var type = getWidenedType(getTypeOfExpression(expr));
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeBaseConstructorTypeOfClass(node, enclosingDeclaration, flags, writer) {
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(node));
-            resolveBaseTypesOfClass(classType);
-            var baseType = classType.resolvedBaseTypes.length ? classType.resolvedBaseTypes[0] : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(baseType, writer, enclosingDeclaration, flags);
-        }
-        function hasGlobalName(name) {
-            return ts.hasProperty(globals, name);
-        }
-        function getReferencedValueSymbol(reference) {
-            return getNodeLinks(reference).resolvedSymbol ||
-                resolveName(reference, reference.text, 107455 | 1048576 | 8388608, undefined, undefined);
-        }
-        function getReferencedValueDeclaration(reference) {
-            ts.Debug.assert(!ts.nodeIsSynthesized(reference));
-            var symbol = getReferencedValueSymbol(reference);
-            return symbol && getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
-        }
-        function createResolver() {
-            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
-            var fileToDirective;
-            if (resolvedTypeReferenceDirectives) {
-                fileToDirective = ts.createFileMap();
-                for (var key in resolvedTypeReferenceDirectives) {
-                    if (!ts.hasProperty(resolvedTypeReferenceDirectives, key)) {
-                        continue;
-                    }
-                    var resolvedDirective = resolvedTypeReferenceDirectives[key];
-                    if (!resolvedDirective) {
-                        continue;
-                    }
-                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
-                    fileToDirective.set(file.path, key);
-                }
-            }
-            return {
-                getReferencedExportContainer: getReferencedExportContainer,
-                getReferencedImportDeclaration: getReferencedImportDeclaration,
-                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
-                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
-                isValueAliasDeclaration: isValueAliasDeclaration,
-                hasGlobalName: hasGlobalName,
-                isReferencedAliasDeclaration: isReferencedAliasDeclaration,
-                getNodeCheckFlags: getNodeCheckFlags,
-                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
-                isDeclarationVisible: isDeclarationVisible,
-                isImplementationOfOverload: isImplementationOfOverload,
-                writeTypeOfDeclaration: writeTypeOfDeclaration,
-                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
-                writeTypeOfExpression: writeTypeOfExpression,
-                writeBaseConstructorTypeOfClass: writeBaseConstructorTypeOfClass,
-                isSymbolAccessible: isSymbolAccessible,
-                isEntityNameVisible: isEntityNameVisible,
-                getConstantValue: getConstantValue,
-                collectLinkedAliases: collectLinkedAliases,
-                getReferencedValueDeclaration: getReferencedValueDeclaration,
-                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
-                isOptionalParameter: isOptionalParameter,
-                moduleExportsSomeValue: moduleExportsSomeValue,
-                isArgumentsLocalBinding: isArgumentsLocalBinding,
-                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
-                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
-                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol
-            };
-            function getTypeReferenceDirectivesForEntityName(node) {
-                if (!fileToDirective) {
-                    return undefined;
-                }
-                var meaning = (node.kind === 172) || (node.kind === 69 && isInTypeQuery(node))
-                    ? 107455 | 1048576
-                    : 793056 | 1536;
-                var symbol = resolveEntityName(node, meaning, true);
-                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
-            }
-            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
-                if (!fileToDirective) {
-                    return undefined;
-                }
-                if (!isSymbolFromTypeDeclarationFile(symbol)) {
-                    return undefined;
-                }
-                var typeReferenceDirectives;
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    if (decl.symbol && decl.symbol.flags & meaning) {
-                        var file = ts.getSourceFileOfNode(decl);
-                        var typeReferenceDirective = fileToDirective.get(file.path);
-                        if (typeReferenceDirective) {
-                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
-                        }
-                    }
-                }
-                return typeReferenceDirectives;
-            }
-            function isSymbolFromTypeDeclarationFile(symbol) {
-                if (!symbol.declarations) {
-                    return false;
-                }
-                var current = symbol;
-                while (true) {
-                    var parent_12 = getParentOfSymbol(current);
-                    if (parent_12) {
-                        current = parent_12;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                if (current.valueDeclaration && current.valueDeclaration.kind === 256 && current.flags & 512) {
-                    return false;
-                }
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var file = ts.getSourceFileOfNode(decl);
-                    if (fileToDirective.contains(file.path)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-        }
-        function getExternalModuleFileFromDeclaration(declaration) {
-            var specifier = ts.getExternalModuleName(declaration);
-            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, undefined);
-            if (!moduleSymbol) {
-                return undefined;
-            }
-            return ts.getDeclarationOfKind(moduleSymbol, 256);
-        }
-        function initializeTypeChecker() {
-            ts.forEach(host.getSourceFiles(), function (file) {
-                ts.bindSourceFile(file, compilerOptions);
-            });
-            var augmentations;
-            ts.forEach(host.getSourceFiles(), function (file) {
-                if (!ts.isExternalOrCommonJsModule(file)) {
-                    mergeSymbolTable(globals, file.locals);
-                }
-                if (file.moduleAugmentations.length) {
-                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
-                }
-                if (file.symbol && file.symbol.globalExports) {
-                    mergeSymbolTable(globals, file.symbol.globalExports);
-                }
-            });
-            if (augmentations) {
-                for (var _i = 0, augmentations_1 = augmentations; _i < augmentations_1.length; _i++) {
-                    var list = augmentations_1[_i];
-                    for (var _a = 0, list_2 = list; _a < list_2.length; _a++) {
-                        var augmentation = list_2[_a];
-                        mergeModuleAugmentation(augmentation);
-                    }
-                }
-            }
-            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
-            getSymbolLinks(undefinedSymbol).type = undefinedType;
-            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
-            getSymbolLinks(unknownSymbol).type = unknownType;
-            globalArrayType = getGlobalType("Array", 1);
-            globalObjectType = getGlobalType("Object");
-            globalFunctionType = getGlobalType("Function");
-            globalStringType = getGlobalType("String");
-            globalNumberType = getGlobalType("Number");
-            globalBooleanType = getGlobalType("Boolean");
-            globalRegExpType = getGlobalType("RegExp");
-            jsxElementType = getExportedTypeFromNamespace("JSX", JsxNames.Element);
-            getGlobalClassDecoratorType = ts.memoize(function () { return getGlobalType("ClassDecorator"); });
-            getGlobalPropertyDecoratorType = ts.memoize(function () { return getGlobalType("PropertyDecorator"); });
-            getGlobalMethodDecoratorType = ts.memoize(function () { return getGlobalType("MethodDecorator"); });
-            getGlobalParameterDecoratorType = ts.memoize(function () { return getGlobalType("ParameterDecorator"); });
-            getGlobalTypedPropertyDescriptorType = ts.memoize(function () { return getGlobalType("TypedPropertyDescriptor", 1); });
-            getGlobalESSymbolConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Symbol"); });
-            getGlobalPromiseType = ts.memoize(function () { return getGlobalType("Promise", 1); });
-            tryGetGlobalPromiseType = ts.memoize(function () { return getGlobalSymbol("Promise", 793056, undefined) && getGlobalPromiseType(); });
-            getGlobalPromiseLikeType = ts.memoize(function () { return getGlobalType("PromiseLike", 1); });
-            getInstantiatedGlobalPromiseLikeType = ts.memoize(createInstantiatedPromiseLikeType);
-            getGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Promise"); });
-            getGlobalPromiseConstructorLikeType = ts.memoize(function () { return getGlobalType("PromiseConstructorLike"); });
-            getGlobalThenableType = ts.memoize(createThenableType);
-            getGlobalTemplateStringsArrayType = ts.memoize(function () { return getGlobalType("TemplateStringsArray"); });
-            if (languageVersion >= 2) {
-                getGlobalESSymbolType = ts.memoize(function () { return getGlobalType("Symbol"); });
-                getGlobalIterableType = ts.memoize(function () { return getGlobalType("Iterable", 1); });
-                getGlobalIteratorType = ts.memoize(function () { return getGlobalType("Iterator", 1); });
-                getGlobalIterableIteratorType = ts.memoize(function () { return getGlobalType("IterableIterator", 1); });
-            }
-            else {
-                getGlobalESSymbolType = ts.memoize(function () { return emptyObjectType; });
-                getGlobalIterableType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIteratorType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIterableIteratorType = ts.memoize(function () { return emptyGenericType; });
-            }
-            anyArrayType = createArrayType(anyType);
-            var symbol = getGlobalSymbol("ReadonlyArray", 793056, undefined);
-            globalReadonlyArrayType = symbol && getTypeOfGlobalSymbol(symbol, 1);
-            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
-        }
-        function createInstantiatedPromiseLikeType() {
-            var promiseLikeType = getGlobalPromiseLikeType();
-            if (promiseLikeType !== emptyGenericType) {
-                return createTypeReference(promiseLikeType, [anyType]);
-            }
-            return emptyObjectType;
-        }
-        function createThenableType() {
-            var thenPropertySymbol = createSymbol(67108864 | 4, "then");
-            getSymbolLinks(thenPropertySymbol).type = globalFunctionType;
-            var thenableType = createObjectType(65536);
-            thenableType.properties = [thenPropertySymbol];
-            thenableType.members = createSymbolTable(thenableType.properties);
-            thenableType.callSignatures = [];
-            thenableType.constructSignatures = [];
-            return thenableType;
-        }
-        function checkGrammarDecorators(node) {
-            if (!node.decorators) {
-                return false;
-            }
-            if (!ts.nodeCanBeDecorated(node)) {
-                if (node.kind === 147 && !ts.nodeIsPresent(node.body)) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
-                }
-                else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
-                }
-            }
-            else if (node.kind === 149 || node.kind === 150) {
-                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
-                }
-            }
-            return false;
-        }
-        function checkGrammarModifiers(node) {
-            switch (node.kind) {
-                case 149:
-                case 150:
-                case 148:
-                case 145:
-                case 144:
-                case 147:
-                case 146:
-                case 153:
-                case 225:
-                case 230:
-                case 229:
-                case 236:
-                case 235:
-                case 142:
-                    break;
-                case 220:
-                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 118) &&
-                        node.parent.kind !== 226 && node.parent.kind !== 256) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                case 221:
-                case 222:
-                case 200:
-                case 223:
-                    if (node.modifiers && node.parent.kind !== 226 && node.parent.kind !== 256) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                case 224:
-                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 74) &&
-                        node.parent.kind !== 226 && node.parent.kind !== 256) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                default:
-                    return false;
-            }
-            if (!node.modifiers) {
-                return;
-            }
-            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
-            var flags = 0;
-            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
-                var modifier = _a[_i];
-                if (modifier.kind !== 128) {
-                    if (node.kind === 144 || node.kind === 146) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
-                    }
-                    if (node.kind === 153) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
-                    }
-                }
-                switch (modifier.kind) {
-                    case 74:
-                        if (node.kind !== 224 && node.parent.kind === 221) {
-                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(74));
-                        }
-                        break;
-                    case 112:
-                    case 111:
-                    case 110:
-                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
-                        if (modifier.kind === 111) {
-                            lastProtected = modifier;
-                        }
-                        else if (modifier.kind === 110) {
-                            lastPrivate = modifier;
-                        }
-                        if (flags & 28) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
-                        }
-                        else if (flags & 32) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
-                        }
-                        else if (flags & 64) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
-                        }
-                        else if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
-                        }
-                        else if (node.parent.kind === 226 || node.parent.kind === 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
-                        }
-                        else if (flags & 128) {
-                            if (modifier.kind === 110) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
-                            }
-                            else {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
-                            }
-                        }
-                        flags |= ts.modifierToFlag(modifier.kind);
-                        break;
-                    case 113:
-                        if (flags & 32) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
-                        }
-                        else if (flags & 64) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
-                        }
-                        else if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
-                        }
-                        else if (node.parent.kind === 226 || node.parent.kind === 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
-                        }
-                        else if (node.kind === 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
-                        }
-                        else if (flags & 128) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                        }
-                        flags |= 32;
-                        lastStatic = modifier;
-                        break;
-                    case 128:
-                        if (flags & 64) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
-                        }
-                        else if (node.kind !== 145 && node.kind !== 144 && node.kind !== 153 && node.kind !== 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
-                        }
-                        flags |= 64;
-                        lastReadonly = modifier;
-                        break;
-                    case 82:
-                        if (flags & 1) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
-                        }
-                        else if (flags & 2) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
-                        }
-                        else if (flags & 128) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
-                        }
-                        else if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
-                        }
-                        else if (node.parent.kind === 221) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
-                        }
-                        else if (node.kind === 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
-                        }
-                        flags |= 1;
-                        break;
-                    case 122:
-                        if (flags & 2) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
-                        }
-                        else if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.parent.kind === 221) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
-                        }
-                        else if (node.kind === 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
-                        }
-                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 226) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
-                        }
-                        flags |= 2;
-                        lastDeclare = modifier;
-                        break;
-                    case 115:
-                        if (flags & 128) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
-                        }
-                        if (node.kind !== 221) {
-                            if (node.kind !== 147 &&
-                                node.kind !== 145 &&
-                                node.kind !== 149 &&
-                                node.kind !== 150) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
-                            }
-                            if (!(node.parent.kind === 221 && node.parent.flags & 128)) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
-                            }
-                            if (flags & 32) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                            }
-                            if (flags & 8) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
-                            }
-                        }
-                        flags |= 128;
-                        break;
-                    case 118:
-                        if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
-                        }
-                        else if (flags & 2 || ts.isInAmbientContext(node.parent)) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.kind === 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
-                        }
-                        flags |= 256;
-                        lastAsync = modifier;
-                        break;
-                }
-            }
-            if (node.kind === 148) {
-                if (flags & 32) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
-                }
-                if (flags & 128) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
-                }
-                else if (flags & 256) {
-                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
-                }
-                else if (flags & 64) {
-                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
-                }
-                return;
-            }
-            else if ((node.kind === 230 || node.kind === 229) && flags & 2) {
-                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
-            }
-            else if (node.kind === 142 && (flags & 92) && ts.isBindingPattern(node.name)) {
-                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_a_binding_pattern);
-            }
-            if (flags & 256) {
-                return checkGrammarAsyncModifier(node, lastAsync);
-            }
-        }
-        function checkGrammarAsyncModifier(node, asyncModifier) {
-            if (languageVersion < 2) {
-                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
-            }
-            switch (node.kind) {
-                case 147:
-                case 220:
-                case 179:
-                case 180:
-                    if (!node.asteriskToken) {
-                        return false;
-                    }
-                    break;
-            }
-            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
-        }
-        function checkGrammarForDisallowedTrailingComma(list) {
-            if (list && list.hasTrailingComma) {
-                var start = list.end - ",".length;
-                var end = list.end;
-                var sourceFile = ts.getSourceFileOfNode(list[0]);
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
-            }
-        }
-        function checkGrammarTypeParameterList(node, typeParameters, file) {
-            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
-                return true;
-            }
-            if (typeParameters && typeParameters.length === 0) {
-                var start = typeParameters.pos - "<".length;
-                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
-                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
-            }
-        }
-        function checkGrammarParameterList(parameters) {
-            if (checkGrammarForDisallowedTrailingComma(parameters)) {
-                return true;
-            }
-            var seenOptionalParameter = false;
-            var parameterCount = parameters.length;
-            for (var i = 0; i < parameterCount; i++) {
-                var parameter = parameters[i];
-                if (parameter.dotDotDotToken) {
-                    if (i !== (parameterCount - 1)) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
-                    }
-                    if (ts.isBindingPattern(parameter.name)) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
-                    }
-                    if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
-                    }
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
-                    }
-                }
-                else if (parameter.questionToken) {
-                    seenOptionalParameter = true;
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
-                    }
-                }
-                else if (seenOptionalParameter && !parameter.initializer) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
-                }
-            }
-        }
-        function checkGrammarFunctionLikeDeclaration(node) {
-            var file = ts.getSourceFileOfNode(node);
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node, node.typeParameters, file) ||
-                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
-        }
-        function checkGrammarArrowFunction(node, file) {
-            if (node.kind === 180) {
-                var arrowFunction = node;
-                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
-                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
-                if (startLine !== endLine) {
-                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
-                }
-            }
-            return false;
-        }
-        function checkGrammarIndexSignatureParameters(node) {
-            var parameter = node.parameters[0];
-            if (node.parameters.length !== 1) {
-                if (parameter) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
-                }
-                else {
-                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
-                }
-            }
-            if (parameter.dotDotDotToken) {
-                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
-            }
-            if (parameter.flags & 1023) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
-            }
-            if (parameter.questionToken) {
-                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
-            }
-            if (parameter.initializer) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
-            }
-            if (!parameter.type) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
-            }
-            if (parameter.type.kind !== 132 && parameter.type.kind !== 130) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
-            }
-            if (!node.type) {
-                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
-            }
-        }
-        function checkGrammarIndexSignature(node) {
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
-        }
-        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
-            if (typeArguments && typeArguments.length === 0) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                var start = typeArguments.pos - "<".length;
-                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
-            }
-        }
-        function checkGrammarTypeArguments(node, typeArguments) {
-            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
-                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
-        }
-        function checkGrammarForOmittedArgument(node, args) {
-            if (args) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                for (var _i = 0, args_1 = args; _i < args_1.length; _i++) {
-                    var arg = args_1[_i];
-                    if (arg.kind === 193) {
-                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
-                    }
-                }
-            }
-        }
-        function checkGrammarArguments(node, args) {
-            return checkGrammarForDisallowedTrailingComma(args) ||
-                checkGrammarForOmittedArgument(node, args);
-        }
-        function checkGrammarHeritageClause(node) {
-            var types = node.types;
-            if (checkGrammarForDisallowedTrailingComma(types)) {
-                return true;
-            }
-            if (types && types.length === 0) {
-                var listType = ts.tokenToString(node.token);
-                var sourceFile = ts.getSourceFileOfNode(node);
-                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
-            }
-        }
-        function checkGrammarClassDeclarationHeritageClauses(node) {
-            var seenExtendsClause = false;
-            var seenImplementsClause = false;
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
-                        }
-                        if (heritageClause.types.length > 1) {
-                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
-                        }
-                        seenExtendsClause = true;
-                    }
-                    else {
-                        ts.Debug.assert(heritageClause.token === 106);
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
-                        }
-                        seenImplementsClause = true;
-                    }
-                    checkGrammarHeritageClause(heritageClause);
-                }
-            }
-        }
-        function checkGrammarInterfaceDeclaration(node) {
-            var seenExtendsClause = false;
-            if (node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        seenExtendsClause = true;
-                    }
-                    else {
-                        ts.Debug.assert(heritageClause.token === 106);
-                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
-                    }
-                    checkGrammarHeritageClause(heritageClause);
-                }
-            }
-            return false;
-        }
-        function checkGrammarComputedPropertyName(node) {
-            if (node.kind !== 140) {
-                return false;
-            }
-            var computedPropertyName = node;
-            if (computedPropertyName.expression.kind === 187 && computedPropertyName.expression.operatorToken.kind === 24) {
-                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
-            }
-        }
-        function checkGrammarForGenerator(node) {
-            if (node.asteriskToken) {
-                ts.Debug.assert(node.kind === 220 ||
-                    node.kind === 179 ||
-                    node.kind === 147);
-                if (ts.isInAmbientContext(node)) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
-                }
-                if (!node.body) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
-                }
-                if (languageVersion < 2) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
-                }
-            }
-        }
-        function checkGrammarForInvalidQuestionMark(node, questionToken, message) {
-            if (questionToken) {
-                return grammarErrorOnNode(questionToken, message);
-            }
-        }
-        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
-            var seen = {};
-            var Property = 1;
-            var GetAccessor = 2;
-            var SetAccessor = 4;
-            var GetOrSetAccessor = GetAccessor | SetAccessor;
-            var _loop_1 = function(prop) {
-                var name_20 = prop.name;
-                if (prop.kind === 193 ||
-                    name_20.kind === 140) {
-                    checkGrammarComputedPropertyName(name_20);
-                }
-                if (prop.kind === 254 && !inDestructuring && prop.objectAssignmentInitializer) {
-                    return { value: grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment) };
-                }
-                ts.forEach(prop.modifiers, function (mod) {
-                    if (mod.kind !== 118 || prop.kind !== 147) {
-                        grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
-                    }
-                });
-                var currentKind = void 0;
-                if (prop.kind === 253 || prop.kind === 254) {
-                    checkGrammarForInvalidQuestionMark(prop, prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
-                    if (name_20.kind === 8) {
-                        checkGrammarNumericLiteral(name_20);
-                    }
-                    currentKind = Property;
-                }
-                else if (prop.kind === 147) {
-                    currentKind = Property;
-                }
-                else if (prop.kind === 149) {
-                    currentKind = GetAccessor;
-                }
-                else if (prop.kind === 150) {
-                    currentKind = SetAccessor;
-                }
-                else {
-                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
-                }
-                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_20);
-                if (effectiveName === undefined) {
-                    return "continue";
-                }
-                if (!ts.hasProperty(seen, effectiveName)) {
-                    seen[effectiveName] = currentKind;
-                }
-                else {
-                    var existingKind = seen[effectiveName];
-                    if (currentKind === Property && existingKind === Property) {
-                        grammarErrorOnNode(name_20, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_20));
-                    }
-                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
-                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[effectiveName] = currentKind | existingKind;
-                        }
-                        else {
-                            return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
-                        }
-                    }
-                    else {
-                        return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name) };
-                    }
-                }
-            };
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var prop = _a[_i];
-                var state_2 = _loop_1(prop);
-                if (typeof state_2 === "object") return state_2.value;
-            }
-        }
-        function checkGrammarJsxElement(node) {
-            var seen = {};
-            for (var _i = 0, _a = node.attributes; _i < _a.length; _i++) {
-                var attr = _a[_i];
-                if (attr.kind === 247) {
-                    continue;
-                }
-                var jsxAttr = attr;
-                var name_21 = jsxAttr.name;
-                if (!ts.hasProperty(seen, name_21.text)) {
-                    seen[name_21.text] = true;
-                }
-                else {
-                    return grammarErrorOnNode(name_21, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
-                }
-                var initializer = jsxAttr.initializer;
-                if (initializer && initializer.kind === 248 && !initializer.expression) {
-                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
-                }
-            }
-        }
-        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
-            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
-                return true;
-            }
-            if (forInOrOfStatement.initializer.kind === 219) {
-                var variableList = forInOrOfStatement.initializer;
-                if (!checkGrammarVariableDeclarationList(variableList)) {
-                    var declarations = variableList.declarations;
-                    if (!declarations.length) {
-                        return false;
-                    }
-                    if (declarations.length > 1) {
-                        var diagnostic = forInOrOfStatement.kind === 207
-                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
-                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
-                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
-                    }
-                    var firstDeclaration = declarations[0];
-                    if (firstDeclaration.initializer) {
-                        var diagnostic = forInOrOfStatement.kind === 207
-                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
-                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
-                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
-                    }
-                    if (firstDeclaration.type) {
-                        var diagnostic = forInOrOfStatement.kind === 207
-                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
-                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
-                        return grammarErrorOnNode(firstDeclaration, diagnostic);
-                    }
-                }
-            }
-            return false;
-        }
-        function checkGrammarAccessor(accessor) {
-            var kind = accessor.kind;
-            if (languageVersion < 1) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
-            }
-            else if (ts.isInAmbientContext(accessor)) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
-            }
-            else if (accessor.body === undefined && !(accessor.flags & 128)) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
-            }
-            else if (accessor.typeParameters) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
-            }
-            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
-                return grammarErrorOnNode(accessor.name, kind === 149 ?
-                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
-                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
-            }
-            else if (kind === 150) {
-                if (accessor.type) {
-                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
-                }
-                else {
-                    var parameter = accessor.parameters[0];
-                    if (parameter.dotDotDotToken) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
-                    }
-                    else if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
-                    }
-                    else if (parameter.initializer) {
-                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
-                    }
-                }
-            }
-        }
-        function doesAccessorHaveCorrectParameterCount(accessor) {
-            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 149 ? 0 : 1);
-        }
-        function getAccessorThisParameter(accessor) {
-            if (accessor.parameters.length === (accessor.kind === 149 ? 1 : 2) &&
-                accessor.parameters[0].name.kind === 69 &&
-                accessor.parameters[0].name.originalKeywordKind === 97) {
-                return accessor.parameters[0];
-            }
-        }
-        function checkGrammarForNonSymbolComputedProperty(node, message) {
-            if (ts.isDynamicName(node)) {
-                return grammarErrorOnNode(node, message);
-            }
-        }
-        function checkGrammarMethod(node) {
-            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
-                checkGrammarFunctionLikeDeclaration(node) ||
-                checkGrammarForGenerator(node)) {
-                return true;
-            }
-            if (node.parent.kind === 171) {
-                if (checkGrammarForInvalidQuestionMark(node, node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
-                    return true;
-                }
-                else if (node.body === undefined) {
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
-                }
-            }
-            if (ts.isClassLike(node.parent)) {
-                if (ts.isInAmbientContext(node)) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
-                }
-                else if (!node.body) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
-                }
-            }
-            else if (node.parent.kind === 222) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
-            }
-            else if (node.parent.kind === 159) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
-            }
-        }
-        function checkGrammarBreakOrContinueStatement(node) {
-            var current = node;
-            while (current) {
-                if (ts.isFunctionLike(current)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
-                }
-                switch (current.kind) {
-                    case 214:
-                        if (node.label && current.label.text === node.label.text) {
-                            var isMisplacedContinueLabel = node.kind === 209
-                                && !ts.isIterationStatement(current.statement, true);
-                            if (isMisplacedContinueLabel) {
-                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
-                            }
-                            return false;
-                        }
-                        break;
-                    case 213:
-                        if (node.kind === 210 && !node.label) {
-                            return false;
-                        }
-                        break;
-                    default:
-                        if (ts.isIterationStatement(current, false) && !node.label) {
-                            return false;
-                        }
-                        break;
-                }
-                current = current.parent;
-            }
-            if (node.label) {
-                var message = node.kind === 210
-                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-            else {
-                var message = node.kind === 210
-                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-        }
-        function checkGrammarBindingElement(node) {
-            if (node.dotDotDotToken) {
-                var elements = node.parent.elements;
-                if (node !== ts.lastOrUndefined(elements)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
-                }
-                if (node.name.kind === 168 || node.name.kind === 167) {
-                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
-                }
-                if (node.initializer) {
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
-                }
-            }
-        }
-        function checkGrammarVariableDeclaration(node) {
-            if (node.parent.parent.kind !== 207 && node.parent.parent.kind !== 208) {
-                if (ts.isInAmbientContext(node)) {
-                    if (node.initializer) {
-                        var equalsTokenLength = "=".length;
-                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-                    }
-                }
-                else if (!node.initializer) {
-                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
-                    }
-                    if (ts.isConst(node)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
-                    }
-                }
-            }
-            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
-            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
-        }
-        function checkGrammarNameInLetOrConstDeclarations(name) {
-            if (name.kind === 69) {
-                if (name.originalKeywordKind === 108) {
-                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
-                }
-            }
-            else {
-                var elements = name.elements;
-                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
-                    var element = elements_2[_i];
-                    if (element.kind !== 193) {
-                        checkGrammarNameInLetOrConstDeclarations(element.name);
-                    }
-                }
-            }
-        }
-        function checkGrammarVariableDeclarationList(declarationList) {
-            var declarations = declarationList.declarations;
-            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
-                return true;
-            }
-            if (!declarationList.declarations.length) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
-            }
-        }
-        function allowLetAndConstDeclarations(parent) {
-            switch (parent.kind) {
-                case 203:
-                case 204:
-                case 205:
-                case 212:
-                case 206:
-                case 207:
-                case 208:
-                    return false;
-                case 214:
-                    return allowLetAndConstDeclarations(parent.parent);
-            }
-            return true;
-        }
-        function checkGrammarForDisallowedLetOrConstStatement(node) {
-            if (!allowLetAndConstDeclarations(node.parent)) {
-                if (ts.isLet(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
-                }
-                else if (ts.isConst(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
-                }
-            }
-        }
-        function hasParseDiagnostics(sourceFile) {
-            return sourceFile.parseDiagnostics.length > 0;
-        }
-        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function checkGrammarConstructorTypeParameters(node) {
-            if (node.typeParameters) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
-            }
-        }
-        function checkGrammarConstructorTypeAnnotation(node) {
-            if (node.type) {
-                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
-            }
-        }
-        function checkGrammarProperty(node) {
-            if (ts.isClassLike(node.parent)) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-            }
-            else if (node.parent.kind === 222) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
-                }
-            }
-            else if (node.parent.kind === 159) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
-                }
-            }
-            if (ts.isInAmbientContext(node) && node.initializer) {
-                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-            }
-        }
-        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
-            if (node.kind === 222 ||
-                node.kind === 223 ||
-                node.kind === 230 ||
-                node.kind === 229 ||
-                node.kind === 236 ||
-                node.kind === 235 ||
-                (node.flags & 2) ||
-                (node.flags & (1 | 512))) {
-                return false;
-            }
-            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
-        }
-        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
-            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
-                var decl = _a[_i];
-                if (ts.isDeclaration(decl) || decl.kind === 200) {
-                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
-                        return true;
-                    }
-                }
-            }
-        }
-        function checkGrammarSourceFile(node) {
-            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
-        }
-        function checkGrammarStatementInAmbientContext(node) {
-            if (ts.isInAmbientContext(node)) {
-                if (isAccessor(node.parent.kind)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
-                }
-                var links = getNodeLinks(node);
-                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
-                }
-                if (node.parent.kind === 199 || node.parent.kind === 226 || node.parent.kind === 256) {
-                    var links_1 = getNodeLinks(node.parent);
-                    if (!links_1.hasReportedStatementInAmbientContext) {
-                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
-                    }
-                }
-                else {
-                }
-            }
-        }
-        function checkGrammarNumericLiteral(node) {
-            if (node.isOctalLiteral && languageVersion >= 1) {
-                return grammarErrorOnNode(node, ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
-            }
-        }
-        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span), 0, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        var _a;
-    }
-    ts.createTypeChecker = createTypeChecker;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var nullSourceMapWriter;
-    var defaultLastEncodedSourceMapSpan = {
-        emittedLine: 1,
-        emittedColumn: 1,
-        sourceLine: 1,
-        sourceColumn: 1,
-        sourceIndex: 0
-    };
-    function getNullSourceMapWriter() {
-        if (nullSourceMapWriter === undefined) {
-            nullSourceMapWriter = {
-                getSourceMapData: function () { return undefined; },
-                setSourceFile: function (sourceFile) { },
-                emitStart: function (range) { },
-                emitEnd: function (range, stopOverridingSpan) { },
-                emitPos: function (pos) { },
-                changeEmitSourcePos: function () { },
-                getText: function () { return undefined; },
-                getSourceMappingURL: function () { return undefined; },
-                initialize: function (filePath, sourceMapFilePath, sourceFiles, isBundledEmit) { },
-                reset: function () { }
-            };
-        }
-        return nullSourceMapWriter;
-    }
-    ts.getNullSourceMapWriter = getNullSourceMapWriter;
-    function createSourceMapWriter(host, writer) {
-        var compilerOptions = host.getCompilerOptions();
-        var currentSourceFile;
-        var sourceMapDir;
-        var stopOverridingSpan = false;
-        var modifyLastSourcePos = false;
-        var sourceMapSourceIndex;
-        var lastRecordedSourceMapSpan;
-        var lastEncodedSourceMapSpan;
-        var lastEncodedNameIndex;
-        var sourceMapData;
-        return {
-            getSourceMapData: function () { return sourceMapData; },
-            setSourceFile: setSourceFile,
-            emitPos: emitPos,
-            emitStart: emitStart,
-            emitEnd: emitEnd,
-            changeEmitSourcePos: changeEmitSourcePos,
-            getText: getText,
-            getSourceMappingURL: getSourceMappingURL,
-            initialize: initialize,
-            reset: reset
-        };
-        function initialize(filePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
-            if (sourceMapData) {
-                reset();
-            }
-            currentSourceFile = undefined;
-            sourceMapSourceIndex = -1;
-            lastRecordedSourceMapSpan = undefined;
-            lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
-            lastEncodedNameIndex = 0;
-            sourceMapData = {
-                sourceMapFilePath: sourceMapFilePath,
-                jsSourceMappingURL: !compilerOptions.inlineSourceMap ? ts.getBaseFileName(ts.normalizeSlashes(sourceMapFilePath)) : undefined,
-                sourceMapFile: ts.getBaseFileName(ts.normalizeSlashes(filePath)),
-                sourceMapSourceRoot: compilerOptions.sourceRoot || "",
-                sourceMapSources: [],
-                inputSourceFileNames: [],
-                sourceMapNames: [],
-                sourceMapMappings: "",
-                sourceMapSourcesContent: compilerOptions.inlineSources ? [] : undefined,
-                sourceMapDecodedMappings: []
-            };
-            sourceMapData.sourceMapSourceRoot = ts.normalizeSlashes(sourceMapData.sourceMapSourceRoot);
-            if (sourceMapData.sourceMapSourceRoot.length && sourceMapData.sourceMapSourceRoot.charCodeAt(sourceMapData.sourceMapSourceRoot.length - 1) !== 47) {
-                sourceMapData.sourceMapSourceRoot += ts.directorySeparator;
-            }
-            if (compilerOptions.mapRoot) {
-                sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
-                if (!isBundledEmit) {
-                    ts.Debug.assert(sourceFiles.length === 1);
-                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFiles[0], host, sourceMapDir));
-                }
-                if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
-                    sourceMapDir = ts.combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
-                    sourceMapData.jsSourceMappingURL = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizePath(filePath)), ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), host.getCurrentDirectory(), host.getCanonicalFileName, true);
-                }
-                else {
-                    sourceMapData.jsSourceMappingURL = ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL);
-                }
-            }
-            else {
-                sourceMapDir = ts.getDirectoryPath(ts.normalizePath(filePath));
-            }
-        }
-        function reset() {
-            currentSourceFile = undefined;
-            sourceMapDir = undefined;
-            sourceMapSourceIndex = undefined;
-            lastRecordedSourceMapSpan = undefined;
-            lastEncodedSourceMapSpan = undefined;
-            lastEncodedNameIndex = undefined;
-            sourceMapData = undefined;
-        }
-        function updateLastEncodedAndRecordedSpans() {
-            if (modifyLastSourcePos) {
-                modifyLastSourcePos = false;
-                lastRecordedSourceMapSpan.emittedLine = lastEncodedSourceMapSpan.emittedLine;
-                lastRecordedSourceMapSpan.emittedColumn = lastEncodedSourceMapSpan.emittedColumn;
-                sourceMapData.sourceMapDecodedMappings.pop();
-                lastEncodedSourceMapSpan = sourceMapData.sourceMapDecodedMappings.length ?
-                    sourceMapData.sourceMapDecodedMappings[sourceMapData.sourceMapDecodedMappings.length - 1] :
-                    defaultLastEncodedSourceMapSpan;
-                var sourceMapMappings = sourceMapData.sourceMapMappings;
-                var lenthToSet = sourceMapMappings.length - 1;
-                for (; lenthToSet >= 0; lenthToSet--) {
-                    var currentChar = sourceMapMappings.charAt(lenthToSet);
-                    if (currentChar === ",") {
-                        break;
-                    }
-                    if (currentChar === ";" && lenthToSet !== 0 && sourceMapMappings.charAt(lenthToSet - 1) !== ";") {
-                        break;
-                    }
-                }
-                sourceMapData.sourceMapMappings = sourceMapMappings.substr(0, Math.max(0, lenthToSet));
-            }
-        }
-        function encodeLastRecordedSourceMapSpan() {
-            if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) {
-                return;
-            }
-            var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn;
-            if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) {
-                if (sourceMapData.sourceMapMappings) {
-                    sourceMapData.sourceMapMappings += ",";
-                }
-            }
-            else {
-                for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) {
-                    sourceMapData.sourceMapMappings += ";";
-                }
-                prevEncodedEmittedColumn = 1;
-            }
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn);
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex);
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine);
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn);
-            if (lastRecordedSourceMapSpan.nameIndex >= 0) {
-                ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this");
-                sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex);
-                lastEncodedNameIndex = lastRecordedSourceMapSpan.nameIndex;
-            }
-            lastEncodedSourceMapSpan = lastRecordedSourceMapSpan;
-            sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan);
-        }
-        function emitPos(pos) {
-            if (pos === -1) {
-                return;
-            }
-            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSourceFile, pos);
-            sourceLinePos.line++;
-            sourceLinePos.character++;
-            var emittedLine = writer.getLine();
-            var emittedColumn = writer.getColumn();
-            if (!lastRecordedSourceMapSpan ||
-                lastRecordedSourceMapSpan.emittedLine !== emittedLine ||
-                lastRecordedSourceMapSpan.emittedColumn !== emittedColumn ||
-                (lastRecordedSourceMapSpan.sourceIndex === sourceMapSourceIndex &&
-                    (lastRecordedSourceMapSpan.sourceLine > sourceLinePos.line ||
-                        (lastRecordedSourceMapSpan.sourceLine === sourceLinePos.line && lastRecordedSourceMapSpan.sourceColumn > sourceLinePos.character)))) {
-                encodeLastRecordedSourceMapSpan();
-                lastRecordedSourceMapSpan = {
-                    emittedLine: emittedLine,
-                    emittedColumn: emittedColumn,
-                    sourceLine: sourceLinePos.line,
-                    sourceColumn: sourceLinePos.character,
-                    sourceIndex: sourceMapSourceIndex
-                };
-                stopOverridingSpan = false;
-            }
-            else if (!stopOverridingSpan) {
-                lastRecordedSourceMapSpan.sourceLine = sourceLinePos.line;
-                lastRecordedSourceMapSpan.sourceColumn = sourceLinePos.character;
-                lastRecordedSourceMapSpan.sourceIndex = sourceMapSourceIndex;
-            }
-            updateLastEncodedAndRecordedSpans();
-        }
-        function getStartPos(range) {
-            var rangeHasDecorators = !!range.decorators;
-            return range.pos !== -1 ? ts.skipTrivia(currentSourceFile.text, rangeHasDecorators ? range.decorators.end : range.pos) : -1;
-        }
-        function emitStart(range) {
-            emitPos(getStartPos(range));
-        }
-        function emitEnd(range, stopOverridingEnd) {
-            emitPos(range.end);
-            stopOverridingSpan = stopOverridingEnd;
-        }
-        function changeEmitSourcePos() {
-            ts.Debug.assert(!modifyLastSourcePos);
-            modifyLastSourcePos = true;
-        }
-        function setSourceFile(sourceFile) {
-            currentSourceFile = sourceFile;
-            var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
-            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSourceFile.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, true);
-            sourceMapSourceIndex = ts.indexOf(sourceMapData.sourceMapSources, source);
-            if (sourceMapSourceIndex === -1) {
-                sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
-                sourceMapData.sourceMapSources.push(source);
-                sourceMapData.inputSourceFileNames.push(sourceFile.fileName);
-                if (compilerOptions.inlineSources) {
-                    sourceMapData.sourceMapSourcesContent.push(sourceFile.text);
-                }
-            }
-        }
-        function getText() {
-            encodeLastRecordedSourceMapSpan();
-            return ts.stringify({
-                version: 3,
-                file: sourceMapData.sourceMapFile,
-                sourceRoot: sourceMapData.sourceMapSourceRoot,
-                sources: sourceMapData.sourceMapSources,
-                names: sourceMapData.sourceMapNames,
-                mappings: sourceMapData.sourceMapMappings,
-                sourcesContent: sourceMapData.sourceMapSourcesContent
-            });
-        }
-        function getSourceMappingURL() {
-            if (compilerOptions.inlineSourceMap) {
-                var base64SourceMapText = ts.convertToBase64(getText());
-                return sourceMapData.jsSourceMappingURL = "data:application/json;base64," + base64SourceMapText;
-            }
-            else {
-                return sourceMapData.jsSourceMappingURL;
-            }
-        }
-    }
-    ts.createSourceMapWriter = createSourceMapWriter;
-    var base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-    function base64FormatEncode(inValue) {
-        if (inValue < 64) {
-            return base64Chars.charAt(inValue);
-        }
-        throw TypeError(inValue + ": not a 64 based value");
-    }
-    function base64VLQFormatEncode(inValue) {
-        if (inValue < 0) {
-            inValue = ((-inValue) << 1) + 1;
-        }
-        else {
-            inValue = inValue << 1;
-        }
-        var encodedStr = "";
-        do {
-            var currentDigit = inValue & 31;
-            inValue = inValue >> 5;
-            if (inValue > 0) {
-                currentDigit = currentDigit | 32;
-            }
-            encodedStr = encodedStr + base64FormatEncode(currentDigit);
-        } while (inValue > 0);
-        return encodedStr;
-    }
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
-        var declarationDiagnostics = ts.createDiagnosticCollection();
-        ts.forEachExpectedEmitFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
-        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
-        function getDeclarationDiagnosticsFromFile(_a, sources, isBundledEmit) {
-            var declarationFilePath = _a.declarationFilePath;
-            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sources, isBundledEmit);
-        }
-    }
-    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
-    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit) {
-        var newLine = host.getNewLine();
-        var compilerOptions = host.getCompilerOptions();
-        var write;
-        var writeLine;
-        var increaseIndent;
-        var decreaseIndent;
-        var writeTextOfNode;
-        var writer;
-        createAndSetNewTextWriterWithSymbolWriter();
-        var enclosingDeclaration;
-        var resultHasExternalModuleIndicator;
-        var currentText;
-        var currentLineMap;
-        var currentIdentifiers;
-        var isCurrentFileExternalModule;
-        var reportedDeclarationError = false;
-        var errorNameNode;
-        var emitJsDocComments = compilerOptions.removeComments ? function (declaration) { } : writeJsDocComments;
-        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
-        var noDeclare;
-        var moduleElementDeclarationEmitInfo = [];
-        var asynchronousSubModuleDeclarationEmitInfo;
-        var referencesOutput = "";
-        var usedTypeDirectiveReferences;
-        var emittedReferencedFiles = [];
-        var addedGlobalFileReference = false;
-        var allSourcesModuleElementDeclarationEmitInfo = [];
-        ts.forEach(sourceFiles, function (sourceFile) {
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                return;
-            }
-            if (!compilerOptions.noResolve) {
-                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
-                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
-                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
-                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference)) {
-                            addedGlobalFileReference = true;
-                        }
-                        emittedReferencedFiles.push(referencedFile);
-                    }
-                });
-            }
-            resultHasExternalModuleIndicator = false;
-            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
-                noDeclare = false;
-                emitSourceFile(sourceFile);
-            }
-            else if (ts.isExternalModule(sourceFile)) {
-                noDeclare = true;
-                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
-                writeLine();
-                increaseIndent();
-                emitSourceFile(sourceFile);
-                decreaseIndent();
-                write("}");
-                writeLine();
-            }
-            if (moduleElementDeclarationEmitInfo.length) {
-                var oldWriter = writer;
-                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
-                        ts.Debug.assert(aliasEmitInfo.node.kind === 230);
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            increaseIndent();
-                        }
-                        writeImportDeclaration(aliasEmitInfo.node);
-                        aliasEmitInfo.asynchronousOutput = writer.getText();
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            decreaseIndent();
-                        }
-                    }
-                });
-                setWriter(oldWriter);
-                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
-                moduleElementDeclarationEmitInfo = [];
-            }
-            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
-                write("export {};");
-                writeLine();
-            }
-        });
-        if (usedTypeDirectiveReferences) {
-            for (var directive in usedTypeDirectiveReferences) {
-                if (ts.hasProperty(usedTypeDirectiveReferences, directive)) {
-                    referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
-                }
-            }
-        }
-        return {
-            reportedDeclarationError: reportedDeclarationError,
-            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
-            synchronousDeclarationOutput: writer.getText(),
-            referencesOutput: referencesOutput
-        };
-        function hasInternalAnnotation(range) {
-            var comment = currentText.substring(range.pos, range.end);
-            return comment.indexOf("@internal") >= 0;
-        }
-        function stripInternal(node) {
-            if (node) {
-                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
-                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
-                    return;
-                }
-                emitNode(node);
-            }
-        }
-        function createAndSetNewTextWriterWithSymbolWriter() {
-            var writer = ts.createTextWriter(newLine);
-            writer.trackSymbol = trackSymbol;
-            writer.reportInaccessibleThisError = reportInaccessibleThisError;
-            writer.writeKeyword = writer.write;
-            writer.writeOperator = writer.write;
-            writer.writePunctuation = writer.write;
-            writer.writeSpace = writer.write;
-            writer.writeStringLiteral = writer.writeLiteral;
-            writer.writeParameter = writer.write;
-            writer.writeSymbol = writer.write;
-            setWriter(writer);
-        }
-        function setWriter(newWriter) {
-            writer = newWriter;
-            write = newWriter.write;
-            writeTextOfNode = newWriter.writeTextOfNode;
-            writeLine = newWriter.writeLine;
-            increaseIndent = newWriter.increaseIndent;
-            decreaseIndent = newWriter.decreaseIndent;
-        }
-        function writeAsynchronousModuleElements(nodes) {
-            var oldWriter = writer;
-            ts.forEach(nodes, function (declaration) {
-                var nodeToCheck;
-                if (declaration.kind === 218) {
-                    nodeToCheck = declaration.parent.parent;
-                }
-                else if (declaration.kind === 233 || declaration.kind === 234 || declaration.kind === 231) {
-                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
-                }
-                else {
-                    nodeToCheck = declaration;
-                }
-                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
-                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                }
-                if (moduleElementEmitInfo) {
-                    if (moduleElementEmitInfo.node.kind === 230) {
-                        moduleElementEmitInfo.isVisible = true;
-                    }
-                    else {
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
-                            increaseIndent();
-                        }
-                        if (nodeToCheck.kind === 225) {
-                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
-                            asynchronousSubModuleDeclarationEmitInfo = [];
-                        }
-                        writeModuleElement(nodeToCheck);
-                        if (nodeToCheck.kind === 225) {
-                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
-                            asynchronousSubModuleDeclarationEmitInfo = undefined;
-                        }
-                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
-                    }
-                }
-            });
-            setWriter(oldWriter);
-        }
-        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
-            if (!typeReferenceDirectives) {
-                return;
-            }
-            if (!usedTypeDirectiveReferences) {
-                usedTypeDirectiveReferences = {};
-            }
-            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
-                var directive = typeReferenceDirectives_1[_i];
-                if (!ts.hasProperty(usedTypeDirectiveReferences, directive)) {
-                    usedTypeDirectiveReferences[directive] = directive;
-                }
-            }
-        }
-        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
-            if (symbolAccessibilityResult.accessibility === 0) {
-                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
-                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
-                }
-            }
-            else {
-                reportedDeclarationError = true;
-                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
-                if (errorInfo) {
-                    if (errorInfo.typeName) {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                    else {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                }
-            }
-        }
-        function trackSymbol(symbol, enclosingDeclaration, meaning) {
-            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning));
-            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
-        }
-        function reportInaccessibleThisError() {
-            if (errorNameNode) {
-                reportedDeclarationError = true;
-                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
-            }
-        }
-        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (type) {
-                emitType(type);
-            }
-            else {
-                errorNameNode = declaration.name;
-                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, 2, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (signature.type) {
-                emitType(signature.type);
-            }
-            else {
-                errorNameNode = signature.name;
-                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 2, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function emitLines(nodes) {
-            for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
-                var node = nodes_2[_i];
-                emit(node);
-            }
-        }
-        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
-            var currentWriterPos = writer.getTextPos();
-            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
-                var node = nodes_3[_i];
-                if (!canEmitFn || canEmitFn(node)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        write(separator);
-                    }
-                    currentWriterPos = writer.getTextPos();
-                    eachNodeEmitFn(node);
-                }
-            }
-        }
-        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
-            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
-        }
-        function writeJsDocComments(declaration) {
-            if (declaration) {
-                var jsDocComments = ts.getJsDocCommentsFromText(declaration, currentText);
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
-                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, true, newLine, ts.writeCommentRange);
-            }
-        }
-        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            emitType(type);
-        }
-        function emitType(type) {
-            switch (type.kind) {
-                case 117:
-                case 132:
-                case 130:
-                case 120:
-                case 133:
-                case 103:
-                case 135:
-                case 93:
-                case 127:
-                case 165:
-                case 166:
-                    return writeTextOfNode(currentText, type);
-                case 194:
-                    return emitExpressionWithTypeArguments(type);
-                case 155:
-                    return emitTypeReference(type);
-                case 158:
-                    return emitTypeQuery(type);
-                case 160:
-                    return emitArrayType(type);
-                case 161:
-                    return emitTupleType(type);
-                case 162:
-                    return emitUnionType(type);
-                case 163:
-                    return emitIntersectionType(type);
-                case 164:
-                    return emitParenType(type);
-                case 156:
-                case 157:
-                    return emitSignatureDeclarationWithJsDocComments(type);
-                case 159:
-                    return emitTypeLiteral(type);
-                case 69:
-                    return emitEntityName(type);
-                case 139:
-                    return emitEntityName(type);
-                case 154:
-                    return emitTypePredicate(type);
-            }
-            function writeEntityName(entityName) {
-                if (entityName.kind === 69) {
-                    writeTextOfNode(currentText, entityName);
-                }
-                else {
-                    var left = entityName.kind === 139 ? entityName.left : entityName.expression;
-                    var right = entityName.kind === 139 ? entityName.right : entityName.name;
-                    writeEntityName(left);
-                    write(".");
-                    writeTextOfNode(currentText, right);
-                }
-            }
-            function emitEntityName(entityName) {
-                var visibilityResult = resolver.isEntityNameVisible(entityName, entityName.parent.kind === 229 ? entityName.parent : enclosingDeclaration);
-                handleSymbolAccessibilityError(visibilityResult);
-                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
-                writeEntityName(entityName);
-            }
-            function emitExpressionWithTypeArguments(node) {
-                if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                    ts.Debug.assert(node.expression.kind === 69 || node.expression.kind === 172);
-                    emitEntityName(node.expression);
-                    if (node.typeArguments) {
-                        write("<");
-                        emitCommaList(node.typeArguments, emitType);
-                        write(">");
-                    }
-                }
-            }
-            function emitTypeReference(type) {
-                emitEntityName(type.typeName);
-                if (type.typeArguments) {
-                    write("<");
-                    emitCommaList(type.typeArguments, emitType);
-                    write(">");
-                }
-            }
-            function emitTypePredicate(type) {
-                writeTextOfNode(currentText, type.parameterName);
-                write(" is ");
-                emitType(type.type);
-            }
-            function emitTypeQuery(type) {
-                write("typeof ");
-                emitEntityName(type.exprName);
-            }
-            function emitArrayType(type) {
-                emitType(type.elementType);
-                write("[]");
-            }
-            function emitTupleType(type) {
-                write("[");
-                emitCommaList(type.elementTypes, emitType);
-                write("]");
-            }
-            function emitUnionType(type) {
-                emitSeparatedList(type.types, " | ", emitType);
-            }
-            function emitIntersectionType(type) {
-                emitSeparatedList(type.types, " & ", emitType);
-            }
-            function emitParenType(type) {
-                write("(");
-                emitType(type.type);
-                write(")");
-            }
-            function emitTypeLiteral(type) {
-                write("{");
-                if (type.members.length) {
-                    writeLine();
-                    increaseIndent();
-                    emitLines(type.members);
-                    decreaseIndent();
-                }
-                write("}");
-            }
-        }
-        function emitSourceFile(node) {
-            currentText = node.text;
-            currentLineMap = ts.getLineStarts(node);
-            currentIdentifiers = node.identifiers;
-            isCurrentFileExternalModule = ts.isExternalModule(node);
-            enclosingDeclaration = node;
-            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, true);
-            emitLines(node.statements);
-        }
-        function getExportDefaultTempVariableName() {
-            var baseName = "_default";
-            if (!ts.hasProperty(currentIdentifiers, baseName)) {
-                return baseName;
-            }
-            var count = 0;
-            while (true) {
-                count++;
-                var name_22 = baseName + "_" + count;
-                if (!ts.hasProperty(currentIdentifiers, name_22)) {
-                    return name_22;
-                }
-            }
-        }
-        function emitExportAssignment(node) {
-            if (node.expression.kind === 69) {
-                write(node.isExportEquals ? "export = " : "export default ");
-                writeTextOfNode(currentText, node.expression);
-            }
-            else {
-                var tempVarName = getExportDefaultTempVariableName();
-                if (!noDeclare) {
-                    write("declare ");
-                }
-                write("var ");
-                write(tempVarName);
-                write(": ");
-                writer.getSymbolAccessibilityDiagnostic = getDefaultExportAccessibilityDiagnostic;
-                resolver.writeTypeOfExpression(node.expression, enclosingDeclaration, 2, writer);
-                write(";");
-                writeLine();
-                write(node.isExportEquals ? "export = " : "export default ");
-                write(tempVarName);
-            }
-            write(";");
-            writeLine();
-            if (node.expression.kind === 69) {
-                var nodes = resolver.collectLinkedAliases(node.expression);
-                writeAsynchronousModuleElements(nodes);
-            }
-            function getDefaultExportAccessibilityDiagnostic(diagnostic) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
-                    errorNode: node
-                };
-            }
-        }
-        function isModuleElementVisible(node) {
-            return resolver.isDeclarationVisible(node);
-        }
-        function emitModuleElement(node, isModuleElementVisible) {
-            if (isModuleElementVisible) {
-                writeModuleElement(node);
-            }
-            else if (node.kind === 229 ||
-                (node.parent.kind === 256 && isCurrentFileExternalModule)) {
-                var isVisible = void 0;
-                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 256) {
-                    asynchronousSubModuleDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-                else {
-                    if (node.kind === 230) {
-                        var importDeclaration = node;
-                        if (importDeclaration.importClause) {
-                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
-                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
-                        }
-                    }
-                    moduleElementDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-            }
-        }
-        function writeModuleElement(node) {
-            switch (node.kind) {
-                case 220:
-                    return writeFunctionDeclaration(node);
-                case 200:
-                    return writeVariableStatement(node);
-                case 222:
-                    return writeInterfaceDeclaration(node);
-                case 221:
-                    return writeClassDeclaration(node);
-                case 223:
-                    return writeTypeAliasDeclaration(node);
-                case 224:
-                    return writeEnumDeclaration(node);
-                case 225:
-                    return writeModuleDeclaration(node);
-                case 229:
-                    return writeImportEqualsDeclaration(node);
-                case 230:
-                    return writeImportDeclaration(node);
-                default:
-                    ts.Debug.fail("Unknown symbol kind");
-            }
-        }
-        function emitModuleElementDeclarationFlags(node) {
-            if (node.parent.kind === 256) {
-                if (node.flags & 1) {
-                    write("export ");
-                }
-                if (node.flags & 512) {
-                    write("default ");
-                }
-                else if (node.kind !== 222 && !noDeclare) {
-                    write("declare ");
-                }
-            }
-        }
-        function emitClassMemberDeclarationFlags(flags) {
-            if (flags & 8) {
-                write("private ");
-            }
-            else if (flags & 16) {
-                write("protected ");
-            }
-            if (flags & 32) {
-                write("static ");
-            }
-            if (flags & 64) {
-                write("readonly ");
-            }
-            if (flags & 128) {
-                write("abstract ");
-            }
-        }
-        function writeImportEqualsDeclaration(node) {
-            emitJsDocComments(node);
-            if (node.flags & 1) {
-                write("export ");
-            }
-            write("import ");
-            writeTextOfNode(currentText, node.name);
-            write(" = ");
-            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
-                write(";");
-            }
-            else {
-                write("require(");
-                emitExternalModuleSpecifier(node);
-                write(");");
-            }
-            writer.writeLine();
-            function getImportEntityNameVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
-                    errorNode: node,
-                    typeName: node.name
-                };
-            }
-        }
-        function isVisibleNamedBinding(namedBindings) {
-            if (namedBindings) {
-                if (namedBindings.kind === 232) {
-                    return resolver.isDeclarationVisible(namedBindings);
-                }
-                else {
-                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
-                }
-            }
-        }
-        function writeImportDeclaration(node) {
-            emitJsDocComments(node);
-            if (node.flags & 1) {
-                write("export ");
-            }
-            write("import ");
-            if (node.importClause) {
-                var currentWriterPos = writer.getTextPos();
-                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
-                    writeTextOfNode(currentText, node.importClause.name);
-                }
-                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        write(", ");
-                    }
-                    if (node.importClause.namedBindings.kind === 232) {
-                        write("* as ");
-                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
-                    }
-                    else {
-                        write("{ ");
-                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
-                        write(" }");
-                    }
-                }
-                write(" from ");
-            }
-            emitExternalModuleSpecifier(node);
-            write(";");
-            writer.writeLine();
-        }
-        function emitExternalModuleSpecifier(parent) {
-            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 225;
-            var moduleSpecifier;
-            if (parent.kind === 229) {
-                var node = parent;
-                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
-            }
-            else if (parent.kind === 225) {
-                moduleSpecifier = parent.name;
-            }
-            else {
-                var node = parent;
-                moduleSpecifier = node.moduleSpecifier;
-            }
-            if (moduleSpecifier.kind === 9 && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
-                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
-                if (moduleName) {
-                    write('"');
-                    write(moduleName);
-                    write('"');
-                    return;
-                }
-            }
-            writeTextOfNode(currentText, moduleSpecifier);
-        }
-        function emitImportOrExportSpecifier(node) {
-            if (node.propertyName) {
-                writeTextOfNode(currentText, node.propertyName);
-                write(" as ");
-            }
-            writeTextOfNode(currentText, node.name);
-        }
-        function emitExportSpecifier(node) {
-            emitImportOrExportSpecifier(node);
-            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
-            writeAsynchronousModuleElements(nodes);
-        }
-        function emitExportDeclaration(node) {
-            emitJsDocComments(node);
-            write("export ");
-            if (node.exportClause) {
-                write("{ ");
-                emitCommaList(node.exportClause.elements, emitExportSpecifier);
-                write(" }");
-            }
-            else {
-                write("*");
-            }
-            if (node.moduleSpecifier) {
-                write(" from ");
-                emitExternalModuleSpecifier(node);
-            }
-            write(";");
-            writer.writeLine();
-        }
-        function writeModuleDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isGlobalScopeAugmentation(node)) {
-                write("global ");
-            }
-            else {
-                if (node.flags & 4096) {
-                    write("namespace ");
-                }
-                else {
-                    write("module ");
-                }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    emitExternalModuleSpecifier(node);
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                }
-            }
-            while (node.body.kind !== 226) {
-                node = node.body;
-                write(".");
-                writeTextOfNode(currentText, node.name);
-            }
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.body.statements);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function writeTypeAliasDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("type ");
-            writeTextOfNode(currentText, node.name);
-            emitTypeParameters(node.typeParameters);
-            write(" = ");
-            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
-            write(";");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-            function getTypeAliasDeclarationVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
-                    errorNode: node.type,
-                    typeName: node.name
-                };
-            }
-        }
-        function writeEnumDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isConst(node)) {
-                write("const ");
-            }
-            write("enum ");
-            writeTextOfNode(currentText, node.name);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-        }
-        function emitEnumMemberDeclaration(node) {
-            emitJsDocComments(node);
-            writeTextOfNode(currentText, node.name);
-            var enumMemberValue = resolver.getConstantValue(node);
-            if (enumMemberValue !== undefined) {
-                write(" = ");
-                write(enumMemberValue.toString());
-            }
-            write(",");
-            writeLine();
-        }
-        function isPrivateMethodTypeParameter(node) {
-            return node.parent.kind === 147 && (node.parent.flags & 8);
-        }
-        function emitTypeParameters(typeParameters) {
-            function emitTypeParameter(node) {
-                increaseIndent();
-                emitJsDocComments(node);
-                decreaseIndent();
-                writeTextOfNode(currentText, node.name);
-                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
-                    write(" extends ");
-                    if (node.parent.kind === 156 ||
-                        node.parent.kind === 157 ||
-                        (node.parent.parent && node.parent.parent.kind === 159)) {
-                        ts.Debug.assert(node.parent.kind === 147 ||
-                            node.parent.kind === 146 ||
-                            node.parent.kind === 156 ||
-                            node.parent.kind === 157 ||
-                            node.parent.kind === 151 ||
-                            node.parent.kind === 152);
-                        emitType(node.constraint);
-                    }
-                    else {
-                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
-                    }
-                }
-                function getTypeParameterConstraintVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage;
-                    switch (node.parent.kind) {
-                        case 221:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
-                            break;
-                        case 222:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 152:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 151:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 147:
-                        case 146:
-                            if (node.parent.flags & 32) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else if (node.parent.parent.kind === 221) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
-                            }
-                            break;
-                        case 220:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                            break;
-                        default:
-                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.name
-                    };
-                }
-            }
-            if (typeParameters) {
-                write("<");
-                emitCommaList(typeParameters, emitTypeParameter);
-                write(">");
-            }
-        }
-        function emitHeritageClause(typeReferences, isImplementsList) {
-            if (typeReferences) {
-                write(isImplementsList ? " implements " : " extends ");
-                emitCommaList(typeReferences, emitTypeOfTypeReference);
-            }
-            function emitTypeOfTypeReference(node) {
-                if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
-                }
-                else if (!isImplementsList && node.expression.kind === 93) {
-                    write("null");
-                }
-                else {
-                    writer.getSymbolAccessibilityDiagnostic = getHeritageClauseVisibilityError;
-                    resolver.writeBaseConstructorTypeOfClass(enclosingDeclaration, enclosingDeclaration, 2, writer);
-                }
-                function getHeritageClauseVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage;
-                    if (node.parent.parent.kind === 221) {
-                        diagnosticMessage = isImplementsList ?
-                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
-                            ts.Diagnostics.Extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        diagnosticMessage = ts.Diagnostics.Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.parent.parent.name
-                    };
-                }
-            }
-        }
-        function writeClassDeclaration(node) {
-            function emitParameterProperties(constructorDeclaration) {
-                if (constructorDeclaration) {
-                    ts.forEach(constructorDeclaration.parameters, function (param) {
-                        if (param.flags & 92) {
-                            emitPropertyDeclaration(param);
-                        }
-                    });
-                }
-            }
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (node.flags & 128) {
-                write("abstract ");
-            }
-            write("class ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                emitHeritageClause([baseTypeNode], false);
-            }
-            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), true);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitParameterProperties(ts.getFirstConstructorWithBody(node));
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function writeInterfaceDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("interface ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            emitHeritageClause(ts.getInterfaceBaseTypeNodes(node), false);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function emitPropertyDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            emitJsDocComments(node);
-            emitClassMemberDeclarationFlags(node.flags);
-            emitVariableDeclaration(node);
-            write(";");
-            writeLine();
-        }
-        function emitVariableDeclaration(node) {
-            if (node.kind !== 218 || resolver.isDeclarationVisible(node)) {
-                if (ts.isBindingPattern(node.name)) {
-                    emitBindingPattern(node.name);
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                    if ((node.kind === 145 || node.kind === 144 || node.kind === 142) && ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                    if ((node.kind === 145 || node.kind === 144) && node.parent.kind === 159) {
-                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
-                    }
-                    else if (!(node.flags & 8)) {
-                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                if (node.kind === 218) {
-                    return symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 ?
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
-                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
-                }
-                else if (node.kind === 145 || node.kind === 144) {
-                    if (node.flags & 32) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else if (node.parent.kind === 221) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
-            }
-            function emitBindingPattern(bindingPattern) {
-                var elements = [];
-                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (element.kind !== 193) {
-                        elements.push(element);
-                    }
-                }
-                emitCommaList(elements, emitBindingElement);
-            }
-            function emitBindingElement(bindingElement) {
-                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                    return diagnosticMessage !== undefined ? {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: bindingElement,
-                        typeName: bindingElement.name
-                    } : undefined;
-                }
-                if (bindingElement.name) {
-                    if (ts.isBindingPattern(bindingElement.name)) {
-                        emitBindingPattern(bindingElement.name);
-                    }
-                    else {
-                        writeTextOfNode(currentText, bindingElement.name);
-                        writeTypeOfDeclaration(bindingElement, undefined, getBindingElementTypeVisibilityError);
-                    }
-                }
-            }
-        }
-        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
-            if (node.type) {
-                write(": ");
-                emitType(node.type);
-            }
-        }
-        function isVariableStatementVisible(node) {
-            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
-        }
-        function writeVariableStatement(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isLet(node.declarationList)) {
-                write("let ");
-            }
-            else if (ts.isConst(node.declarationList)) {
-                write("const ");
-            }
-            else {
-                write("var ");
-            }
-            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
-            write(";");
-            writeLine();
-        }
-        function emitAccessorDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-            var accessorWithTypeAnnotation;
-            if (node === accessors.firstAccessor) {
-                emitJsDocComments(accessors.getAccessor);
-                emitJsDocComments(accessors.setAccessor);
-                emitClassMemberDeclarationFlags(node.flags | (accessors.setAccessor ? 0 : 64));
-                writeTextOfNode(currentText, node.name);
-                if (!(node.flags & 8)) {
-                    accessorWithTypeAnnotation = node;
-                    var type = getTypeAnnotationFromAccessor(node);
-                    if (!type) {
-                        var anotherAccessor = node.kind === 149 ? accessors.setAccessor : accessors.getAccessor;
-                        type = getTypeAnnotationFromAccessor(anotherAccessor);
-                        if (type) {
-                            accessorWithTypeAnnotation = anotherAccessor;
-                        }
-                    }
-                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
-                }
-                write(";");
-                writeLine();
-            }
-            function getTypeAnnotationFromAccessor(accessor) {
-                if (accessor) {
-                    return accessor.kind === 149
-                        ? accessor.type
-                        : accessor.parameters.length > 0
-                            ? accessor.parameters[0].type
-                            : undefined;
-                }
-            }
-            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                if (accessorWithTypeAnnotation.kind === 150) {
-                    if (accessorWithTypeAnnotation.parent.flags & 32) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.parameters[0],
-                        typeName: accessorWithTypeAnnotation.name
-                    };
-                }
-                else {
-                    if (accessorWithTypeAnnotation.flags & 32) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
-                    }
-                    else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.name,
-                        typeName: undefined
-                    };
-                }
-            }
-        }
-        function writeFunctionDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            if (!resolver.isImplementationOfOverload(node)) {
-                emitJsDocComments(node);
-                if (node.kind === 220) {
-                    emitModuleElementDeclarationFlags(node);
-                }
-                else if (node.kind === 147 || node.kind === 148) {
-                    emitClassMemberDeclarationFlags(node.flags);
-                }
-                if (node.kind === 220) {
-                    write("function ");
-                    writeTextOfNode(currentText, node.name);
-                }
-                else if (node.kind === 148) {
-                    write("constructor");
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                    if (ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                }
-                emitSignatureDeclaration(node);
-            }
-        }
-        function emitSignatureDeclarationWithJsDocComments(node) {
-            emitJsDocComments(node);
-            emitSignatureDeclaration(node);
-        }
-        function emitSignatureDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            var closeParenthesizedFunctionType = false;
-            if (node.kind === 153) {
-                emitClassMemberDeclarationFlags(node.flags);
-                write("[");
-            }
-            else {
-                if (node.kind === 152 || node.kind === 157) {
-                    write("new ");
-                }
-                else if (node.kind === 156) {
-                    var currentOutput = writer.getText();
-                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
-                        closeParenthesizedFunctionType = true;
-                        write("(");
-                    }
-                }
-                emitTypeParameters(node.typeParameters);
-                write("(");
-            }
-            emitCommaList(node.parameters, emitParameterDeclaration);
-            if (node.kind === 153) {
-                write("]");
-            }
-            else {
-                write(")");
-            }
-            var isFunctionTypeOrConstructorType = node.kind === 156 || node.kind === 157;
-            if (isFunctionTypeOrConstructorType || node.parent.kind === 159) {
-                if (node.type) {
-                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
-                    emitType(node.type);
-                }
-            }
-            else if (node.kind !== 148 && !(node.flags & 8)) {
-                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
-            }
-            enclosingDeclaration = prevEnclosingDeclaration;
-            if (!isFunctionTypeOrConstructorType) {
-                write(";");
-                writeLine();
-            }
-            else if (closeParenthesizedFunctionType) {
-                write(")");
-            }
-            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                switch (node.kind) {
-                    case 152:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 151:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 153:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 147:
-                    case 146:
-                        if (node.flags & 32) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 ?
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
-                        }
-                        else if (node.parent.kind === 221) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 ?
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
-                        }
-                        else {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
-                        }
-                        break;
-                    case 220:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
-                        break;
-                    default:
-                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
-                }
-                return {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node.name || node
-                };
-            }
-        }
-        function emitParameterDeclaration(node) {
-            increaseIndent();
-            emitJsDocComments(node);
-            if (node.dotDotDotToken) {
-                write("...");
-            }
-            if (ts.isBindingPattern(node.name)) {
-                emitBindingPattern(node.name);
-            }
-            else {
-                writeTextOfNode(currentText, node.name);
-            }
-            if (resolver.isOptionalParameter(node)) {
-                write("?");
-            }
-            decreaseIndent();
-            if (node.parent.kind === 156 ||
-                node.parent.kind === 157 ||
-                node.parent.parent.kind === 159) {
-                emitTypeOfVariableDeclarationFromTypeLiteral(node);
-            }
-            else if (!(node.parent.flags & 8)) {
-                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
-            }
-            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
-            }
-            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                switch (node.parent.kind) {
-                    case 148:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
-                    case 152:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 151:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 147:
-                    case 146:
-                        if (node.parent.flags & 32) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 ?
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else if (node.parent.parent.kind === 221) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 ?
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
-                        }
-                    case 220:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                    default:
-                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
-                }
-            }
-            function emitBindingPattern(bindingPattern) {
-                if (bindingPattern.kind === 167) {
-                    write("{");
-                    emitCommaList(bindingPattern.elements, emitBindingElement);
-                    write("}");
-                }
-                else if (bindingPattern.kind === 168) {
-                    write("[");
-                    var elements = bindingPattern.elements;
-                    emitCommaList(elements, emitBindingElement);
-                    if (elements && elements.hasTrailingComma) {
-                        write(", ");
-                    }
-                    write("]");
-                }
-            }
-            function emitBindingElement(bindingElement) {
-                if (bindingElement.kind === 193) {
-                    write(" ");
-                }
-                else if (bindingElement.kind === 169) {
-                    if (bindingElement.propertyName) {
-                        writeTextOfNode(currentText, bindingElement.propertyName);
-                        write(": ");
-                    }
-                    if (bindingElement.name) {
-                        if (ts.isBindingPattern(bindingElement.name)) {
-                            emitBindingPattern(bindingElement.name);
-                        }
-                        else {
-                            ts.Debug.assert(bindingElement.name.kind === 69);
-                            if (bindingElement.dotDotDotToken) {
-                                write("...");
-                            }
-                            writeTextOfNode(currentText, bindingElement.name);
-                        }
-                    }
-                }
-            }
-        }
-        function emitNode(node) {
-            switch (node.kind) {
-                case 220:
-                case 225:
-                case 229:
-                case 222:
-                case 221:
-                case 223:
-                case 224:
-                    return emitModuleElement(node, isModuleElementVisible(node));
-                case 200:
-                    return emitModuleElement(node, isVariableStatementVisible(node));
-                case 230:
-                    return emitModuleElement(node, !node.importClause);
-                case 236:
-                    return emitExportDeclaration(node);
-                case 148:
-                case 147:
-                case 146:
-                    return writeFunctionDeclaration(node);
-                case 152:
-                case 151:
-                case 153:
-                    return emitSignatureDeclarationWithJsDocComments(node);
-                case 149:
-                case 150:
-                    return emitAccessorDeclaration(node);
-                case 145:
-                case 144:
-                    return emitPropertyDeclaration(node);
-                case 255:
-                    return emitEnumMemberDeclaration(node);
-                case 235:
-                    return emitExportAssignment(node);
-                case 256:
-                    return emitSourceFile(node);
-            }
-        }
-        function writeReferencePath(referencedFile, addBundledFileReference) {
-            var declFileName;
-            var addedBundledEmitReference = false;
-            if (ts.isDeclarationFile(referencedFile)) {
-                declFileName = referencedFile.fileName;
-            }
-            else {
-                ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile);
-            }
-            if (declFileName) {
-                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, false);
-                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
-            }
-            return addedBundledEmitReference;
-            function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) {
-                if (isBundledEmit && !addBundledFileReference) {
-                    return;
-                }
-                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
-                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
-                addedBundledEmitReference = isBundledEmit;
-            }
-        }
-    }
-    function writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) {
-        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit);
-        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
-        if (!emitSkipped) {
-            var declarationOutput = emitDeclarationResult.referencesOutput
-                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
-            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
-        }
-        return emitSkipped;
-        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
-            var appliedSyncOutputPos = 0;
-            var declarationOutput = "";
-            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                if (aliasEmitInfo.asynchronousOutput) {
-                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
-                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
-                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
-                }
-            });
-            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
-            return declarationOutput;
-        }
-    }
-    ts.writeDeclarationFile = writeDeclarationFile;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getResolvedExternalModuleName(host, file) {
-        return file.moduleName || ts.getExternalModuleNameFromPath(host, file.fileName);
-    }
-    ts.getResolvedExternalModuleName = getResolvedExternalModuleName;
-    function getExternalModuleNameFromDeclaration(host, resolver, declaration) {
-        var file = resolver.getExternalModuleFileFromDeclaration(declaration);
-        if (!file || ts.isDeclarationFile(file)) {
-            return undefined;
-        }
-        return getResolvedExternalModuleName(host, file);
-    }
-    ts.getExternalModuleNameFromDeclaration = getExternalModuleNameFromDeclaration;
-    var entities = {
-        "quot": 0x0022,
-        "amp": 0x0026,
-        "apos": 0x0027,
-        "lt": 0x003C,
-        "gt": 0x003E,
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-        "iexcl": 0x00A1,
-        "cent": 0x00A2,
-        "pound": 0x00A3,
-        "curren": 0x00A4,
-        "yen": 0x00A5,
-        "brvbar": 0x00A6,
-        "sect": 0x00A7,
-        "uml": 0x00A8,
-        "copy": 0x00A9,
-        "ordf": 0x00AA,
-        "laquo": 0x00AB,
-        "not": 0x00AC,
-        "shy": 0x00AD,
-        "reg": 0x00AE,
-        "macr": 0x00AF,
-        "deg": 0x00B0,
-        "plusmn": 0x00B1,
-        "sup2": 0x00B2,
-        "sup3": 0x00B3,
-        "acute": 0x00B4,
-        "micro": 0x00B5,
-        "para": 0x00B6,
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-        "aacute": 0x00E1,
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-        "aring": 0x00E5,
-        "aelig": 0x00E6,
-        "ccedil": 0x00E7,
-        "egrave": 0x00E8,
-        "eacute": 0x00E9,
-        "ecirc": 0x00EA,
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-        "igrave": 0x00EC,
-        "iacute": 0x00ED,
-        "icirc": 0x00EE,
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-        "eth": 0x00F0,
-        "ntilde": 0x00F1,
-        "ograve": 0x00F2,
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-        "ocirc": 0x00F4,
-        "otilde": 0x00F5,
-        "ouml": 0x00F6,
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-        "ugrave": 0x00F9,
-        "uacute": 0x00FA,
-        "ucirc": 0x00FB,
-        "uuml": 0x00FC,
-        "yacute": 0x00FD,
-        "thorn": 0x00FE,
-        "yuml": 0x00FF,
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-        "oelig": 0x0153,
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-        "scaron": 0x0161,
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-        "Zeta": 0x0396,
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-        "Theta": 0x0398,
-        "Iota": 0x0399,
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-        "Lambda": 0x039B,
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-        "Psi": 0x03A8,
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-        "alpha": 0x03B1,
-        "beta": 0x03B2,
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-        "eta": 0x03B7,
-        "theta": 0x03B8,
-        "iota": 0x03B9,
-        "kappa": 0x03BA,
-        "lambda": 0x03BB,
-        "mu": 0x03BC,
-        "nu": 0x03BD,
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-        "sigma": 0x03C3,
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-        "upsih": 0x03D2,
-        "piv": 0x03D6,
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-    function emitFiles(resolver, host, targetSourceFile) {
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-        var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n    for (var s, i = 1, n = arguments.length; i < n; i++) {\n        s = arguments[i];\n        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n            t[p] = s[p];\n    }\n    return t;\n};";
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-        var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};";
-        var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n    return function (target, key) { decorator(target, key, paramIndex); }\n};";
-        var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n    return new (P || (P = Promise))(function (resolve, reject) {\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n        step((generator = generator.apply(thisArg, _arguments)).next());\n    });\n};";
-        var compilerOptions = host.getCompilerOptions();
-        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
-        var modulekind = ts.getEmitModuleKind(compilerOptions);
-        var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
-        var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined;
-        var emitterDiagnostics = ts.createDiagnosticCollection();
-        var emitSkipped = false;
-        var newLine = host.getNewLine();
-        var emitJavaScript = createFileEmitter();
-        ts.forEachExpectedEmitFile(host, emitFile, targetSourceFile);
-        return {
-            emitSkipped: emitSkipped,
-            diagnostics: emitterDiagnostics.getDiagnostics(),
-            emittedFiles: emittedFilesList,
-            sourceMaps: sourceMapDataList
-        };
-        function isUniqueLocalName(name, container) {
-            for (var node = container; ts.isNodeDescendentOf(node, container); node = node.nextContainer) {
-                if (node.locals && ts.hasProperty(node.locals, name)) {
-                    if (node.locals[name].flags & (107455 | 1048576 | 8388608)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        function setLabeledJump(state, isBreak, labelText, labelMarker) {
-            if (isBreak) {
-                if (!state.labeledNonLocalBreaks) {
-                    state.labeledNonLocalBreaks = {};
-                }
-                state.labeledNonLocalBreaks[labelText] = labelMarker;
-            }
-            else {
-                if (!state.labeledNonLocalContinues) {
-                    state.labeledNonLocalContinues = {};
-                }
-                state.labeledNonLocalContinues[labelText] = labelMarker;
-            }
-        }
-        function hoistVariableDeclarationFromLoop(state, declaration) {
-            if (!state.hoistedLocalVariables) {
-                state.hoistedLocalVariables = [];
-            }
-            visit(declaration.name);
-            function visit(node) {
-                if (node.kind === 69) {
-                    state.hoistedLocalVariables.push(node);
-                }
-                else {
-                    for (var _a = 0, _b = node.elements; _a < _b.length; _a++) {
-                        var element = _b[_a];
-                        visit(element.name);
-                    }
-                }
-            }
-        }
-        function createFileEmitter() {
-            var writer = ts.createTextWriter(newLine);
-            var write = writer.write, writeTextOfNode = writer.writeTextOfNode, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent;
-            var sourceMap = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? ts.createSourceMapWriter(host, writer) : ts.getNullSourceMapWriter();
-            var setSourceFile = sourceMap.setSourceFile, emitStart = sourceMap.emitStart, emitEnd = sourceMap.emitEnd, emitPos = sourceMap.emitPos;
-            var currentSourceFile;
-            var currentText;
-            var currentLineMap;
-            var currentFileIdentifiers;
-            var renamedDependencies;
-            var isEs6Module;
-            var isCurrentFileExternalModule;
-            var exportFunctionForFile;
-            var contextObjectForFile;
-            var generatedNameSet;
-            var nodeToGeneratedName;
-            var computedPropertyNamesToGeneratedNames;
-            var decoratedClassAliases;
-            var convertedLoopState;
-            var extendsEmitted;
-            var assignEmitted;
-            var decorateEmitted;
-            var paramEmitted;
-            var awaiterEmitted;
-            var tempFlags = 0;
-            var tempVariables;
-            var tempParameters;
-            var externalImports;
-            var exportSpecifiers;
-            var exportEquals;
-            var hasExportStarsToExportValues;
-            var detachedCommentsInfo;
-            var sourceMapData;
-            var isOwnFileEmit;
-            var emitLeadingCommentsOfPosition = compilerOptions.removeComments ? function (pos) { } : emitLeadingCommentsOfPositionWorker;
-            var setSourceMapWriterEmit = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? changeSourceMapEmit : function (writer) { };
-            var moduleEmitDelegates = (_a = {},
-                _a[ts.ModuleKind.ES6] = emitES6Module,
-                _a[ts.ModuleKind.AMD] = emitAMDModule,
-                _a[ts.ModuleKind.System] = emitSystemModule,
-                _a[ts.ModuleKind.UMD] = emitUMDModule,
-                _a[ts.ModuleKind.CommonJS] = emitCommonJSModule,
-                _a
-            );
-            var bundleEmitDelegates = (_b = {},
-                _b[ts.ModuleKind.ES6] = function () { },
-                _b[ts.ModuleKind.AMD] = emitAMDModule,
-                _b[ts.ModuleKind.System] = emitSystemModule,
-                _b[ts.ModuleKind.UMD] = function () { },
-                _b[ts.ModuleKind.CommonJS] = function () { },
-                _b
-            );
-            return doEmit;
-            function doEmit(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
-                sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
-                generatedNameSet = {};
-                nodeToGeneratedName = [];
-                decoratedClassAliases = [];
-                isOwnFileEmit = !isBundledEmit;
-                if (isBundledEmit && modulekind) {
-                    ts.forEach(sourceFiles, emitEmitHelpers);
-                }
-                ts.forEach(sourceFiles, emitSourceFile);
-                writeLine();
-                var sourceMappingURL = sourceMap.getSourceMappingURL();
-                if (sourceMappingURL) {
-                    write("//# sourceMappingURL=" + sourceMappingURL);
-                }
-                writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, compilerOptions.emitBOM, sourceFiles);
-                sourceMap.reset();
-                writer.reset();
-                currentSourceFile = undefined;
-                currentText = undefined;
-                currentLineMap = undefined;
-                exportFunctionForFile = undefined;
-                contextObjectForFile = undefined;
-                generatedNameSet = undefined;
-                nodeToGeneratedName = undefined;
-                decoratedClassAliases = undefined;
-                computedPropertyNamesToGeneratedNames = undefined;
-                convertedLoopState = undefined;
-                extendsEmitted = false;
-                decorateEmitted = false;
-                paramEmitted = false;
-                awaiterEmitted = false;
-                assignEmitted = false;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = undefined;
-                detachedCommentsInfo = undefined;
-                sourceMapData = undefined;
-                isEs6Module = false;
-                renamedDependencies = undefined;
-                isCurrentFileExternalModule = false;
-            }
-            function emitSourceFile(sourceFile) {
-                currentSourceFile = sourceFile;
-                currentText = sourceFile.text;
-                currentLineMap = ts.getLineStarts(sourceFile);
-                exportFunctionForFile = undefined;
-                contextObjectForFile = undefined;
-                isEs6Module = sourceFile.symbol && sourceFile.symbol.exports && !!sourceFile.symbol.exports["___esModule"];
-                renamedDependencies = sourceFile.renamedDependencies;
-                currentFileIdentifiers = sourceFile.identifiers;
-                isCurrentFileExternalModule = ts.isExternalModule(sourceFile);
-                setSourceFile(sourceFile);
-                emitNodeWithCommentsAndWithoutSourcemap(sourceFile);
-            }
-            function isUniqueName(name) {
-                return !resolver.hasGlobalName(name) &&
-                    !ts.hasProperty(currentFileIdentifiers, name) &&
-                    !ts.hasProperty(generatedNameSet, name);
-            }
-            function makeTempVariableName(flags) {
-                if (flags && !(tempFlags & flags)) {
-                    var name_23 = flags === 268435456 ? "_i" : "_n";
-                    if (isUniqueName(name_23)) {
-                        tempFlags |= flags;
-                        return name_23;
-                    }
-                }
-                while (true) {
-                    var count = tempFlags & 268435455;
-                    tempFlags++;
-                    if (count !== 8 && count !== 13) {
-                        var name_24 = count < 26 ? "_" + String.fromCharCode(97 + count) : "_" + (count - 26);
-                        if (isUniqueName(name_24)) {
-                            return name_24;
-                        }
-                    }
-                }
-            }
-            function makeUniqueName(baseName) {
-                if (baseName.charCodeAt(baseName.length - 1) !== 95) {
-                    baseName += "_";
-                }
-                var i = 1;
-                while (true) {
-                    var generatedName = baseName + i;
-                    if (isUniqueName(generatedName)) {
-                        return generatedNameSet[generatedName] = generatedName;
-                    }
-                    i++;
-                }
-            }
-            function generateNameForModuleOrEnum(node) {
-                var name = node.name.text;
-                return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
-            }
-            function generateNameForImportOrExportDeclaration(node) {
-                var expr = ts.getExternalModuleName(node);
-                var baseName = expr.kind === 9 ?
-                    ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module";
-                return makeUniqueName(baseName);
-            }
-            function generateNameForExportDefault() {
-                return makeUniqueName("default");
-            }
-            function generateNameForClassExpression() {
-                return makeUniqueName("class");
-            }
-            function generateNameForNode(node) {
-                switch (node.kind) {
-                    case 69:
-                        return makeUniqueName(node.text);
-                    case 225:
-                    case 224:
-                        return generateNameForModuleOrEnum(node);
-                    case 230:
-                    case 236:
-                        return generateNameForImportOrExportDeclaration(node);
-                    case 220:
-                    case 221:
-                    case 235:
-                        return generateNameForExportDefault();
-                    case 192:
-                        return generateNameForClassExpression();
-                }
-            }
-            function getGeneratedNameForNode(node) {
-                var id = ts.getNodeId(node);
-                return nodeToGeneratedName[id] || (nodeToGeneratedName[id] = ts.unescapeIdentifier(generateNameForNode(node)));
-            }
-            function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) {
-                if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
-                    ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), false, sourceFiles);
-                }
-                if (sourceMapDataList) {
-                    sourceMapDataList.push(sourceMap.getSourceMapData());
-                }
-                ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles);
-            }
-            function createTempVariable(flags) {
-                var result = ts.createSynthesizedNode(69);
-                result.text = makeTempVariableName(flags);
-                return result;
-            }
-            function recordTempDeclaration(name) {
-                if (!tempVariables) {
-                    tempVariables = [];
-                }
-                tempVariables.push(name);
-            }
-            function createAndRecordTempVariable(flags) {
-                var temp = createTempVariable(flags);
-                recordTempDeclaration(temp);
-                return temp;
-            }
-            function emitTempDeclarations(newLine) {
-                if (tempVariables) {
-                    if (newLine) {
-                        writeLine();
-                    }
-                    else {
-                        write(" ");
-                    }
-                    write("var ");
-                    emitCommaList(tempVariables);
-                    write(";");
-                }
-            }
-            function emitToken(tokenKind, startPos, emitFn) {
-                var tokenStartPos = ts.skipTrivia(currentText, startPos);
-                emitPos(tokenStartPos);
-                var tokenString = ts.tokenToString(tokenKind);
-                if (emitFn) {
-                    emitFn();
-                }
-                else {
-                    write(tokenString);
-                }
-                var tokenEndPos = tokenStartPos + tokenString.length;
-                emitPos(tokenEndPos);
-                return tokenEndPos;
-            }
-            function emitOptional(prefix, node) {
-                if (node) {
-                    write(prefix);
-                    emit(node);
-                }
-            }
-            function emitParenthesizedIf(node, parenthesized) {
-                if (parenthesized) {
-                    write("(");
-                }
-                emit(node);
-                if (parenthesized) {
-                    write(")");
-                }
-            }
-            function emitLinePreservingList(parent, nodes, allowTrailingComma, spacesBetweenBraces) {
-                ts.Debug.assert(nodes.length > 0);
-                increaseIndent();
-                if (nodeStartPositionsAreOnSameLine(parent, nodes[0])) {
-                    if (spacesBetweenBraces) {
-                        write(" ");
-                    }
-                }
-                else {
-                    writeLine();
-                }
-                for (var i = 0, n = nodes.length; i < n; i++) {
-                    if (i) {
-                        if (nodeEndIsOnSameLineAsNodeStart(nodes[i - 1], nodes[i])) {
-                            write(", ");
-                        }
-                        else {
-                            write(",");
-                            writeLine();
-                        }
-                    }
-                    emit(nodes[i]);
-                }
-                if (nodes.hasTrailingComma && allowTrailingComma) {
-                    write(",");
-                }
-                decreaseIndent();
-                if (nodeEndPositionsAreOnSameLine(parent, ts.lastOrUndefined(nodes))) {
-                    if (spacesBetweenBraces) {
-                        write(" ");
-                    }
-                }
-                else {
-                    writeLine();
-                }
-            }
-            function emitList(nodes, start, count, multiLine, trailingComma, leadingComma, noTrailingNewLine, emitNode) {
-                if (!emitNode) {
-                    emitNode = emit;
-                }
-                for (var i = 0; i < count; i++) {
-                    if (multiLine) {
-                        if (i || leadingComma) {
-                            write(",");
-                        }
-                        writeLine();
-                    }
-                    else {
-                        if (i || leadingComma) {
-                            write(", ");
-                        }
-                    }
-                    var node = nodes[start + i];
-                    emitTrailingCommentsOfPosition(node.pos);
-                    emitNode(node);
-                    leadingComma = true;
-                }
-                if (trailingComma) {
-                    write(",");
-                }
-                if (multiLine && !noTrailingNewLine) {
-                    writeLine();
-                }
-                return count;
-            }
-            function emitCommaList(nodes) {
-                if (nodes) {
-                    emitList(nodes, 0, nodes.length, false, false);
-                }
-            }
-            function emitLines(nodes) {
-                emitLinesStartingAt(nodes, 0);
-            }
-            function emitLinesStartingAt(nodes, startIndex) {
-                for (var i = startIndex; i < nodes.length; i++) {
-                    writeLine();
-                    emit(nodes[i]);
-                }
-            }
-            function isBinaryOrOctalIntegerLiteral(node, text) {
-                if (node.kind === 8 && text.length > 1) {
-                    switch (text.charCodeAt(1)) {
-                        case 98:
-                        case 66:
-                        case 111:
-                        case 79:
-                            return true;
-                    }
-                }
-                return false;
-            }
-            function emitLiteral(node) {
-                var text = getLiteralText(node);
-                if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap) && (node.kind === 9 || ts.isTemplateLiteralKind(node.kind))) {
-                    writer.writeLiteral(text);
-                }
-                else if (languageVersion < 2 && isBinaryOrOctalIntegerLiteral(node, text)) {
-                    write(node.text);
-                }
-                else {
-                    write(text);
-                }
-            }
-            function getLiteralText(node) {
-                if (languageVersion < 2 && (ts.isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) {
-                    return getQuotedEscapedLiteralText('"', node.text, '"');
-                }
-                if (node.parent) {
-                    return ts.getTextOfNodeFromSourceText(currentText, node);
-                }
-                switch (node.kind) {
-                    case 9:
-                        return getQuotedEscapedLiteralText('"', node.text, '"');
-                    case 11:
-                        return getQuotedEscapedLiteralText("`", node.text, "`");
-                    case 12:
-                        return getQuotedEscapedLiteralText("`", node.text, "${");
-                    case 13:
-                        return getQuotedEscapedLiteralText("}", node.text, "${");
-                    case 14:
-                        return getQuotedEscapedLiteralText("}", node.text, "`");
-                    case 8:
-                        return node.text;
-                }
-                ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
-            }
-            function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) {
-                return leftQuote + ts.escapeNonAsciiCharacters(ts.escapeString(text)) + rightQuote;
-            }
-            function emitDownlevelRawTemplateLiteral(node) {
-                var text = ts.getTextOfNodeFromSourceText(currentText, node);
-                var isLast = node.kind === 11 || node.kind === 14;
-                text = text.substring(1, text.length - (isLast ? 1 : 2));
-                text = text.replace(/\r\n?/g, "\n");
-                text = ts.escapeString(text);
-                write("\"" + text + "\"");
-            }
-            function emitDownlevelTaggedTemplateArray(node, literalEmitter) {
-                write("[");
-                if (node.template.kind === 11) {
-                    literalEmitter(node.template);
-                }
-                else {
-                    literalEmitter(node.template.head);
-                    ts.forEach(node.template.templateSpans, function (child) {
-                        write(", ");
-                        literalEmitter(child.literal);
-                    });
-                }
-                write("]");
-            }
-            function emitDownlevelTaggedTemplate(node) {
-                var tempVariable = createAndRecordTempVariable(0);
-                write("(");
-                emit(tempVariable);
-                write(" = ");
-                emitDownlevelTaggedTemplateArray(node, emit);
-                write(", ");
-                emit(tempVariable);
-                write(".raw = ");
-                emitDownlevelTaggedTemplateArray(node, emitDownlevelRawTemplateLiteral);
-                write(", ");
-                emitParenthesizedIf(node.tag, needsParenthesisForPropertyAccessOrInvocation(node.tag));
-                write("(");
-                emit(tempVariable);
-                if (node.template.kind === 189) {
-                    ts.forEach(node.template.templateSpans, function (templateSpan) {
-                        write(", ");
-                        var needsParens = templateSpan.expression.kind === 187
-                            && templateSpan.expression.operatorToken.kind === 24;
-                        emitParenthesizedIf(templateSpan.expression, needsParens);
-                    });
-                }
-                write("))");
-            }
-            function emitTemplateExpression(node) {
-                if (languageVersion >= 2) {
-                    ts.forEachChild(node, emit);
-                    return;
-                }
-                var emitOuterParens = ts.isExpression(node.parent)
-                    && templateNeedsParens(node, node.parent);
-                if (emitOuterParens) {
-                    write("(");
-                }
-                var headEmitted = false;
-                if (shouldEmitTemplateHead()) {
-                    emitLiteral(node.head);
-                    headEmitted = true;
-                }
-                for (var i = 0, n = node.templateSpans.length; i < n; i++) {
-                    var templateSpan = node.templateSpans[i];
-                    var needsParens = templateSpan.expression.kind !== 178
-                        && comparePrecedenceToBinaryPlus(templateSpan.expression) !== 1;
-                    if (i > 0 || headEmitted) {
-                        write(" + ");
-                    }
-                    emitParenthesizedIf(templateSpan.expression, needsParens);
-                    if (templateSpan.literal.text.length !== 0) {
-                        write(" + ");
-                        emitLiteral(templateSpan.literal);
-                    }
-                }
-                if (emitOuterParens) {
-                    write(")");
-                }
-                function shouldEmitTemplateHead() {
-                    ts.Debug.assert(node.templateSpans.length !== 0);
-                    return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0;
-                }
-                function templateNeedsParens(template, parent) {
-                    switch (parent.kind) {
-                        case 174:
-                        case 175:
-                            return parent.expression === template;
-                        case 176:
-                        case 178:
-                            return false;
-                        default:
-                            return comparePrecedenceToBinaryPlus(parent) !== -1;
-                    }
-                }
-                function comparePrecedenceToBinaryPlus(expression) {
-                    switch (expression.kind) {
-                        case 187:
-                            switch (expression.operatorToken.kind) {
-                                case 37:
-                                case 39:
-                                case 40:
-                                    return 1;
-                                case 35:
-                                case 36:
-                                    return 0;
-                                default:
-                                    return -1;
-                            }
-                        case 190:
-                        case 188:
-                            return -1;
-                        default:
-                            return 1;
-                    }
-                }
-            }
-            function emitTemplateSpan(span) {
-                emit(span.expression);
-                emit(span.literal);
-            }
-            function jsxEmitReact(node) {
-                function emitTagName(name) {
-                    if (name.kind === 69 && ts.isIntrinsicJsxName(name.text)) {
-                        write('"');
-                        emit(name);
-                        write('"');
-                    }
-                    else {
-                        emit(name);
-                    }
-                }
-                function emitAttributeName(name) {
-                    if (/^[A-Za-z_]\w*$/.test(name.text)) {
-                        emit(name);
-                    }
-                    else {
-                        write('"');
-                        emit(name);
-                        write('"');
-                    }
-                }
-                function emitJsxAttribute(node) {
-                    emitAttributeName(node.name);
-                    write(": ");
-                    if (node.initializer) {
-                        emit(node.initializer);
-                    }
-                    else {
-                        write("true");
-                    }
-                }
-                function emitJsxElement(openingNode, children) {
-                    var syntheticReactRef = ts.createSynthesizedNode(69);
-                    syntheticReactRef.text = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
-                    syntheticReactRef.parent = openingNode;
-                    emitLeadingComments(openingNode);
-                    emitExpressionIdentifier(syntheticReactRef);
-                    write(".createElement(");
-                    emitTagName(openingNode.tagName);
-                    write(", ");
-                    if (openingNode.attributes.length === 0) {
-                        write("null");
-                    }
-                    else {
-                        var attrs = openingNode.attributes;
-                        if (ts.forEach(attrs, function (attr) { return attr.kind === 247; })) {
-                            write("__assign(");
-                            var haveOpenedObjectLiteral = false;
-                            for (var i = 0; i < attrs.length; i++) {
-                                if (attrs[i].kind === 247) {
-                                    if (i === 0) {
-                                        write("{}, ");
-                                    }
-                                    if (haveOpenedObjectLiteral) {
-                                        write("}");
-                                        haveOpenedObjectLiteral = false;
-                                    }
-                                    if (i > 0) {
-                                        write(", ");
-                                    }
-                                    emit(attrs[i].expression);
-                                }
-                                else {
-                                    ts.Debug.assert(attrs[i].kind === 246);
-                                    if (haveOpenedObjectLiteral) {
-                                        write(", ");
-                                    }
-                                    else {
-                                        haveOpenedObjectLiteral = true;
-                                        if (i > 0) {
-                                            write(", ");
-                                        }
-                                        write("{");
-                                    }
-                                    emitJsxAttribute(attrs[i]);
-                                }
-                            }
-                            if (haveOpenedObjectLiteral)
-                                write("}");
-                            write(")");
-                        }
-                        else {
-                            write("{");
-                            for (var i = 0, n = attrs.length; i < n; i++) {
-                                if (i > 0) {
-                                    write(", ");
-                                }
-                                emitJsxAttribute(attrs[i]);
-                            }
-                            write("}");
-                        }
-                    }
-                    if (children) {
-                        var firstChild = void 0;
-                        var multipleEmittableChildren = false;
-                        for (var i = 0, n = children.length; i < n; i++) {
-                            var jsxChild = children[i];
-                            if (isJsxChildEmittable(jsxChild)) {
-                                if (!firstChild) {
-                                    write(", ");
-                                    firstChild = jsxChild;
-                                }
-                                else {
-                                    if (!multipleEmittableChildren) {
-                                        multipleEmittableChildren = true;
-                                        increaseIndent();
-                                        writeLine();
-                                        emit(firstChild);
-                                    }
-                                    write(", ");
-                                    writeLine();
-                                    emit(jsxChild);
-                                }
-                            }
-                        }
-                        if (multipleEmittableChildren) {
-                            decreaseIndent();
-                        }
-                        else if (firstChild) {
-                            if (firstChild.kind !== 241 && firstChild.kind !== 242) {
-                                emit(firstChild);
-                            }
-                            else {
-                                increaseIndent();
-                                writeLine();
-                                emit(firstChild);
-                                writeLine();
-                                decreaseIndent();
-                            }
-                        }
-                    }
-                    write(")");
-                    emitTrailingComments(openingNode);
-                }
-                if (node.kind === 241) {
-                    emitJsxElement(node.openingElement, node.children);
-                }
-                else {
-                    ts.Debug.assert(node.kind === 242);
-                    emitJsxElement(node);
-                }
-            }
-            function jsxEmitPreserve(node) {
-                function emitJsxAttribute(node) {
-                    emit(node.name);
-                    if (node.initializer) {
-                        write("=");
-                        emit(node.initializer);
-                    }
-                }
-                function emitJsxSpreadAttribute(node) {
-                    write("{...");
-                    emit(node.expression);
-                    write("}");
-                }
-                function emitAttributes(attribs) {
-                    for (var i = 0, n = attribs.length; i < n; i++) {
-                        if (i > 0) {
-                            write(" ");
-                        }
-                        if (attribs[i].kind === 247) {
-                            emitJsxSpreadAttribute(attribs[i]);
-                        }
-                        else {
-                            ts.Debug.assert(attribs[i].kind === 246);
-                            emitJsxAttribute(attribs[i]);
-                        }
-                    }
-                }
-                function emitJsxOpeningOrSelfClosingElement(node) {
-                    write("<");
-                    emit(node.tagName);
-                    if (node.attributes.length > 0 || (node.kind === 242)) {
-                        write(" ");
-                    }
-                    emitAttributes(node.attributes);
-                    if (node.kind === 242) {
-                        write("/>");
-                    }
-                    else {
-                        write(">");
-                    }
-                }
-                function emitJsxClosingElement(node) {
-                    write("</");
-                    emit(node.tagName);
-                    write(">");
-                }
-                function emitJsxElement(node) {
-                    emitJsxOpeningOrSelfClosingElement(node.openingElement);
-                    for (var i = 0, n = node.children.length; i < n; i++) {
-                        emit(node.children[i]);
-                    }
-                    emitJsxClosingElement(node.closingElement);
-                }
-                if (node.kind === 241) {
-                    emitJsxElement(node);
-                }
-                else {
-                    ts.Debug.assert(node.kind === 242);
-                    emitJsxOpeningOrSelfClosingElement(node);
-                }
-            }
-            function emitExpressionForPropertyName(node) {
-                ts.Debug.assert(node.kind !== 169);
-                if (node.kind === 9) {
-                    emitLiteral(node);
-                }
-                else if (node.kind === 140) {
-                    if (ts.nodeIsDecorated(node.parent)) {
-                        if (!computedPropertyNamesToGeneratedNames) {
-                            computedPropertyNamesToGeneratedNames = [];
-                        }
-                        var generatedName = computedPropertyNamesToGeneratedNames[ts.getNodeId(node)];
-                        if (generatedName) {
-                            write(generatedName);
-                            return;
-                        }
-                        generatedName = createAndRecordTempVariable(0).text;
-                        computedPropertyNamesToGeneratedNames[ts.getNodeId(node)] = generatedName;
-                        write(generatedName);
-                        write(" = ");
-                    }
-                    emit(node.expression);
-                }
-                else {
-                    write('"');
-                    if (node.kind === 8) {
-                        write(node.text);
-                    }
-                    else {
-                        writeTextOfNode(currentText, node);
-                    }
-                    write('"');
-                }
-            }
-            function isExpressionIdentifier(node) {
-                var parent = node.parent;
-                switch (parent.kind) {
-                    case 170:
-                    case 195:
-                    case 184:
-                    case 187:
-                    case 174:
-                    case 249:
-                    case 140:
-                    case 188:
-                    case 143:
-                    case 181:
-                    case 204:
-                    case 173:
-                    case 235:
-                    case 202:
-                    case 194:
-                    case 206:
-                    case 207:
-                    case 208:
-                    case 203:
-                    case 245:
-                    case 242:
-                    case 243:
-                    case 247:
-                    case 248:
-                    case 175:
-                    case 196:
-                    case 178:
-                    case 186:
-                    case 185:
-                    case 211:
-                    case 254:
-                    case 191:
-                    case 213:
-                    case 176:
-                    case 197:
-                    case 215:
-                    case 177:
-                    case 182:
-                    case 183:
-                    case 205:
-                    case 212:
-                    case 190:
-                        return true;
-                    case 169:
-                    case 255:
-                    case 142:
-                    case 253:
-                    case 145:
-                    case 218:
-                        return parent.initializer === node;
-                    case 172:
-                        return parent.expression === node;
-                    case 180:
-                    case 179:
-                        return parent.body === node;
-                    case 229:
-                        return parent.moduleReference === node;
-                    case 139:
-                        return parent.left === node;
-                }
-                return false;
-            }
-            function emitExpressionIdentifier(node) {
-                var container = resolver.getReferencedExportContainer(node);
-                if (container) {
-                    if (container.kind === 256) {
-                        if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
-                            write("exports.");
-                        }
-                    }
-                    else {
-                        write(getGeneratedNameForNode(container));
-                        write(".");
-                    }
-                }
-                else {
-                    if (modulekind !== ts.ModuleKind.ES6) {
-                        var declaration = resolver.getReferencedImportDeclaration(node);
-                        if (declaration) {
-                            if (declaration.kind === 231) {
-                                write(getGeneratedNameForNode(declaration.parent));
-                                write(languageVersion === 0 ? '["default"]' : ".default");
-                                return;
-                            }
-                            else if (declaration.kind === 234) {
-                                write(getGeneratedNameForNode(declaration.parent.parent.parent));
-                                var name_25 = declaration.propertyName || declaration.name;
-                                var identifier = ts.getTextOfNodeFromSourceText(currentText, name_25);
-                                if (languageVersion === 0 && identifier === "default") {
-                                    write('["default"]');
-                                }
-                                else {
-                                    write(".");
-                                    write(identifier);
-                                }
-                                return;
-                            }
-                        }
-                    }
-                    if (languageVersion < 2) {
-                        var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
-                        if (declaration) {
-                            write(getGeneratedNameForNode(declaration.name));
-                            return;
-                        }
-                    }
-                    else if (resolver.getNodeCheckFlags(node) & 1048576) {
-                        var declaration = resolver.getReferencedValueDeclaration(node);
-                        if (declaration) {
-                            var classAlias = decoratedClassAliases[ts.getNodeId(declaration)];
-                            if (classAlias !== undefined) {
-                                write(classAlias);
-                                return;
-                            }
-                        }
-                    }
-                }
-                if (ts.nodeIsSynthesized(node)) {
-                    write(node.text);
-                }
-                else {
-                    writeTextOfNode(currentText, node);
-                }
-            }
-            function isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node) {
-                if (languageVersion < 2) {
-                    var parent_13 = node.parent;
-                    switch (parent_13.kind) {
-                        case 169:
-                        case 221:
-                        case 224:
-                        case 218:
-                            return parent_13.name === node && resolver.isDeclarationWithCollidingName(parent_13);
-                    }
-                }
-                return false;
-            }
-            function emitIdentifier(node) {
-                if (convertedLoopState) {
-                    if (node.text == "arguments" && resolver.isArgumentsLocalBinding(node)) {
-                        var name_26 = convertedLoopState.argumentsName || (convertedLoopState.argumentsName = makeUniqueName("arguments"));
-                        write(name_26);
-                        return;
-                    }
-                }
-                if (!node.parent) {
-                    write(node.text);
-                }
-                else if (isExpressionIdentifier(node)) {
-                    emitExpressionIdentifier(node);
-                }
-                else if (isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node)) {
-                    write(getGeneratedNameForNode(node));
-                }
-                else if (ts.nodeIsSynthesized(node)) {
-                    write(node.text);
-                }
-                else {
-                    writeTextOfNode(currentText, node);
-                }
-            }
-            function emitThis(node) {
-                if (resolver.getNodeCheckFlags(node) & 2) {
-                    write("_this");
-                }
-                else if (convertedLoopState) {
-                    write(convertedLoopState.thisName || (convertedLoopState.thisName = makeUniqueName("this")));
-                }
-                else {
-                    write("this");
-                }
-            }
-            function emitSuper(node) {
-                if (languageVersion >= 2) {
-                    write("super");
-                }
-                else {
-                    var flags = resolver.getNodeCheckFlags(node);
-                    if (flags & 256) {
-                        write("_super.prototype");
-                    }
-                    else {
-                        write("_super");
-                    }
-                }
-            }
-            function emitObjectBindingPattern(node) {
-                write("{ ");
-                var elements = node.elements;
-                emitList(elements, 0, elements.length, false, elements.hasTrailingComma);
-                write(" }");
-            }
-            function emitArrayBindingPattern(node) {
-                write("[");
-                var elements = node.elements;
-                emitList(elements, 0, elements.length, false, elements.hasTrailingComma);
-                write("]");
-            }
-            function emitBindingElement(node) {
-                if (node.propertyName) {
-                    emit(node.propertyName);
-                    write(": ");
-                }
-                if (node.dotDotDotToken) {
-                    write("...");
-                }
-                if (ts.isBindingPattern(node.name)) {
-                    emit(node.name);
-                }
-                else {
-                    emitModuleMemberName(node);
-                }
-                emitOptional(" = ", node.initializer);
-            }
-            function emitSpreadElementExpression(node) {
-                write("...");
-                emit(node.expression);
-            }
-            function emitYieldExpression(node) {
-                write(ts.tokenToString(114));
-                if (node.asteriskToken) {
-                    write("*");
-                }
-                if (node.expression) {
-                    write(" ");
-                    emit(node.expression);
-                }
-            }
-            function emitAwaitExpression(node) {
-                var needsParenthesis = needsParenthesisForAwaitExpressionAsYield(node);
-                if (needsParenthesis) {
-                    write("(");
-                }
-                write(ts.tokenToString(114));
-                write(" ");
-                emit(node.expression);
-                if (needsParenthesis) {
-                    write(")");
-                }
-            }
-            function needsParenthesisForAwaitExpressionAsYield(node) {
-                if (node.parent.kind === 187 && !ts.isAssignmentOperator(node.parent.operatorToken.kind)) {
-                    return true;
-                }
-                else if (node.parent.kind === 188 && node.parent.condition === node) {
-                    return true;
-                }
-                return false;
-            }
-            function needsParenthesisForPropertyAccessOrInvocation(node) {
-                switch (node.kind) {
-                    case 69:
-                    case 170:
-                    case 172:
-                    case 173:
-                    case 174:
-                    case 178:
-                        return false;
-                }
-                return true;
-            }
-            function emitListWithSpread(elements, needsUniqueCopy, multiLine, trailingComma, useConcat) {
-                var pos = 0;
-                var group = 0;
-                var length = elements.length;
-                while (pos < length) {
-                    if (group === 1 && useConcat) {
-                        write(".concat(");
-                    }
-                    else if (group > 0) {
-                        write(", ");
-                    }
-                    var e = elements[pos];
-                    if (e.kind === 191) {
-                        e = e.expression;
-                        emitParenthesizedIf(e, group === 0 && needsParenthesisForPropertyAccessOrInvocation(e));
-                        pos++;
-                        if (pos === length && group === 0 && needsUniqueCopy && e.kind !== 170) {
-                            write(".slice()");
-                        }
-                    }
-                    else {
-                        var i = pos;
-                        while (i < length && elements[i].kind !== 191) {
-                            i++;
-                        }
-                        write("[");
-                        if (multiLine) {
-                            increaseIndent();
-                        }
-                        emitList(elements, pos, i - pos, multiLine, trailingComma && i === length);
-                        if (multiLine) {
-                            decreaseIndent();
-                        }
-                        write("]");
-                        pos = i;
-                    }
-                    group++;
-                }
-                if (group > 1) {
-                    if (useConcat) {
-                        write(")");
-                    }
-                }
-            }
-            function isSpreadElementExpression(node) {
-                return node.kind === 191;
-            }
-            function emitArrayLiteral(node) {
-                var elements = node.elements;
-                if (elements.length === 0) {
-                    write("[]");
-                }
-                else if (languageVersion >= 2 || !ts.forEach(elements, isSpreadElementExpression)) {
-                    write("[");
-                    emitLinePreservingList(node, node.elements, elements.hasTrailingComma, false);
-                    write("]");
-                }
-                else {
-                    emitListWithSpread(elements, true, node.multiLine, elements.hasTrailingComma, true);
-                }
-            }
-            function emitObjectLiteralBody(node, numElements) {
-                if (numElements === 0) {
-                    write("{}");
-                    return;
-                }
-                write("{");
-                if (numElements > 0) {
-                    var properties = node.properties;
-                    if (numElements === properties.length) {
-                        emitLinePreservingList(node, properties, languageVersion >= 1, true);
-                    }
-                    else {
-                        var multiLine = node.multiLine;
-                        if (!multiLine) {
-                            write(" ");
-                        }
-                        else {
-                            increaseIndent();
-                        }
-                        emitList(properties, 0, numElements, multiLine, false);
-                        if (!multiLine) {
-                            write(" ");
-                        }
-                        else {
-                            decreaseIndent();
-                        }
-                    }
-                }
-                write("}");
-            }
-            function emitDownlevelObjectLiteralWithComputedProperties(node, firstComputedPropertyIndex) {
-                var multiLine = node.multiLine;
-                var properties = node.properties;
-                write("(");
-                if (multiLine) {
-                    increaseIndent();
-                }
-                var tempVar = createAndRecordTempVariable(0);
-                emit(tempVar);
-                write(" = ");
-                emitObjectLiteralBody(node, firstComputedPropertyIndex);
-                for (var i = firstComputedPropertyIndex, n = properties.length; i < n; i++) {
-                    writeComma();
-                    var property = properties[i];
-                    emitStart(property);
-                    if (property.kind === 149 || property.kind === 150) {
-                        var accessors = ts.getAllAccessorDeclarations(node.properties, property);
-                        if (property !== accessors.firstAccessor) {
-                            continue;
-                        }
-                        write("Object.defineProperty(");
-                        emit(tempVar);
-                        write(", ");
-                        emitStart(property.name);
-                        emitExpressionForPropertyName(property.name);
-                        emitEnd(property.name);
-                        write(", {");
-                        increaseIndent();
-                        if (accessors.getAccessor) {
-                            writeLine();
-                            emitLeadingComments(accessors.getAccessor);
-                            write("get: ");
-                            emitStart(accessors.getAccessor);
-                            write("function ");
-                            emitSignatureAndBody(accessors.getAccessor);
-                            emitEnd(accessors.getAccessor);
-                            emitTrailingComments(accessors.getAccessor);
-                            write(",");
-                        }
-                        if (accessors.setAccessor) {
-                            writeLine();
-                            emitLeadingComments(accessors.setAccessor);
-                            write("set: ");
-                            emitStart(accessors.setAccessor);
-                            write("function ");
-                            emitSignatureAndBody(accessors.setAccessor);
-                            emitEnd(accessors.setAccessor);
-                            emitTrailingComments(accessors.setAccessor);
-                            write(",");
-                        }
-                        writeLine();
-                        write("enumerable: true,");
-                        writeLine();
-                        write("configurable: true");
-                        decreaseIndent();
-                        writeLine();
-                        write("})");
-                        emitEnd(property);
-                    }
-                    else {
-                        emitLeadingComments(property);
-                        emitStart(property.name);
-                        emit(tempVar);
-                        emitMemberAccessForPropertyName(property.name);
-                        emitEnd(property.name);
-                        write(" = ");
-                        if (property.kind === 253) {
-                            emit(property.initializer);
-                        }
-                        else if (property.kind === 254) {
-                            emitExpressionIdentifier(property.name);
-                        }
-                        else if (property.kind === 147) {
-                            emitFunctionDeclaration(property);
-                        }
-                        else {
-                            ts.Debug.fail("ObjectLiteralElement type not accounted for: " + property.kind);
-                        }
-                    }
-                    emitEnd(property);
-                }
-                writeComma();
-                emit(tempVar);
-                if (multiLine) {
-                    decreaseIndent();
-                    writeLine();
-                }
-                write(")");
-                function writeComma() {
-                    if (multiLine) {
-                        write(",");
-                        writeLine();
-                    }
-                    else {
-                        write(", ");
-                    }
-                }
-            }
-            function emitObjectLiteral(node) {
-                var properties = node.properties;
-                if (languageVersion < 2) {
-                    var numProperties = properties.length;
-                    var numInitialNonComputedProperties = numProperties;
-                    for (var i = 0, n = properties.length; i < n; i++) {
-                        if (properties[i].name.kind === 140) {
-                            numInitialNonComputedProperties = i;
-                            break;
-                        }
-                    }
-                    var hasComputedProperty = numInitialNonComputedProperties !== properties.length;
-                    if (hasComputedProperty) {
-                        emitDownlevelObjectLiteralWithComputedProperties(node, numInitialNonComputedProperties);
-                        return;
-                    }
-                }
-                emitObjectLiteralBody(node, properties.length);
-            }
-            function createBinaryExpression(left, operator, right, startsOnNewLine) {
-                var result = ts.createSynthesizedNode(187, startsOnNewLine);
-                result.operatorToken = ts.createSynthesizedNode(operator);
-                result.left = left;
-                result.right = right;
-                return result;
-            }
-            function createPropertyAccessExpression(expression, name) {
-                var result = ts.createSynthesizedNode(172);
-                result.expression = parenthesizeForAccess(expression);
-                result.dotToken = ts.createSynthesizedNode(21);
-                result.name = name;
-                return result;
-            }
-            function createElementAccessExpression(expression, argumentExpression) {
-                var result = ts.createSynthesizedNode(173);
-                result.expression = parenthesizeForAccess(expression);
-                result.argumentExpression = argumentExpression;
-                return result;
-            }
-            function parenthesizeForAccess(expr) {
-                while (expr.kind === 177 ||
-                    expr.kind === 195 ||
-                    expr.kind === 196) {
-                    expr = expr.expression;
-                }
-                if (ts.isLeftHandSideExpression(expr) &&
-                    expr.kind !== 175 &&
-                    expr.kind !== 8) {
-                    return expr;
-                }
-                var node = ts.createSynthesizedNode(178);
-                node.expression = expr;
-                return node;
-            }
-            function emitComputedPropertyName(node) {
-                write("[");
-                emitExpressionForPropertyName(node);
-                write("]");
-            }
-            function emitMethod(node) {
-                if (languageVersion >= 2 && node.asteriskToken) {
-                    write("*");
-                }
-                emit(node.name);
-                if (languageVersion < 2) {
-                    write(": function ");
-                }
-                emitSignatureAndBody(node);
-            }
-            function emitPropertyAssignment(node) {
-                emit(node.name);
-                write(": ");
-                emitTrailingCommentsOfPosition(node.initializer.pos);
-                emit(node.initializer);
-            }
-            function isNamespaceExportReference(node) {
-                var container = resolver.getReferencedExportContainer(node);
-                return container && container.kind !== 256;
-            }
-            function isImportedReference(node) {
-                var declaration = resolver.getReferencedImportDeclaration(node);
-                return declaration && (declaration.kind === 231 || declaration.kind === 234);
-            }
-            function emitShorthandPropertyAssignment(node) {
-                writeTextOfNode(currentText, node.name);
-                if (languageVersion < 2 || (modulekind !== ts.ModuleKind.ES6 && isImportedReference(node.name)) || isNamespaceExportReference(node.name)) {
-                    write(": ");
-                    emit(node.name);
-                }
-                if (languageVersion >= 2 && node.objectAssignmentInitializer) {
-                    write(" = ");
-                    emit(node.objectAssignmentInitializer);
-                }
-            }
-            function tryEmitConstantValue(node) {
-                var constantValue = tryGetConstEnumValue(node);
-                if (constantValue !== undefined) {
-                    write(constantValue.toString());
-                    if (!compilerOptions.removeComments) {
-                        var propertyName = node.kind === 172 ? ts.declarationNameToString(node.name) : ts.getTextOfNode(node.argumentExpression);
-                        write(" /* " + propertyName + " */");
-                    }
-                    return true;
-                }
-                return false;
-            }
-            function tryGetConstEnumValue(node) {
-                if (compilerOptions.isolatedModules) {
-                    return undefined;
-                }
-                return node.kind === 172 || node.kind === 173
-                    ? resolver.getConstantValue(node)
-                    : undefined;
-            }
-            function indentIfOnDifferentLines(parent, node1, node2, valueToWriteWhenNotIndenting) {
-                var realNodesAreOnDifferentLines = !ts.nodeIsSynthesized(parent) && !nodeEndIsOnSameLineAsNodeStart(node1, node2);
-                var synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2);
-                if (realNodesAreOnDifferentLines || synthesizedNodeIsOnDifferentLine) {
-                    increaseIndent();
-                    writeLine();
-                    return true;
-                }
-                else {
-                    if (valueToWriteWhenNotIndenting) {
-                        write(valueToWriteWhenNotIndenting);
-                    }
-                    return false;
-                }
-            }
-            function emitPropertyAccess(node) {
-                if (tryEmitConstantValue(node)) {
-                    return;
-                }
-                if (languageVersion === 2 &&
-                    node.expression.kind === 95 &&
-                    isInAsyncMethodWithSuperInES6(node)) {
-                    var name_27 = ts.createSynthesizedNode(9);
-                    name_27.text = node.name.text;
-                    emitSuperAccessInAsyncMethod(node.expression, name_27);
-                    return;
-                }
-                emit(node.expression);
-                var indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, node.dotToken);
-                var shouldEmitSpace = false;
-                if (!indentedBeforeDot) {
-                    if (node.expression.kind === 8) {
-                        var text = ts.getTextOfNodeFromSourceText(currentText, node.expression);
-                        shouldEmitSpace = text.indexOf(ts.tokenToString(21)) < 0;
-                    }
-                    else {
-                        var constantValue = tryGetConstEnumValue(node.expression);
-                        shouldEmitSpace = isFinite(constantValue) && Math.floor(constantValue) === constantValue;
-                    }
-                }
-                if (shouldEmitSpace) {
-                    write(" .");
-                }
-                else {
-                    write(".");
-                }
-                var indentedAfterDot = indentIfOnDifferentLines(node, node.dotToken, node.name);
-                emit(node.name);
-                decreaseIndentIf(indentedBeforeDot, indentedAfterDot);
-            }
-            function emitQualifiedName(node) {
-                emit(node.left);
-                write(".");
-                emit(node.right);
-            }
-            function emitQualifiedNameAsExpression(node, useFallback) {
-                if (node.left.kind === 69) {
-                    emitEntityNameAsExpression(node.left, useFallback);
-                }
-                else if (useFallback) {
-                    var temp = createAndRecordTempVariable(0);
-                    write("(");
-                    emitNodeWithoutSourceMap(temp);
-                    write(" = ");
-                    emitEntityNameAsExpression(node.left, true);
-                    write(") && ");
-                    emitNodeWithoutSourceMap(temp);
-                }
-                else {
-                    emitEntityNameAsExpression(node.left, false);
-                }
-                write(".");
-                emit(node.right);
-            }
-            function emitEntityNameAsExpression(node, useFallback) {
-                switch (node.kind) {
-                    case 69:
-                        if (useFallback) {
-                            write("typeof ");
-                            emitExpressionIdentifier(node);
-                            write(" !== 'undefined' && ");
-                        }
-                        emitExpressionIdentifier(node);
-                        break;
-                    case 139:
-                        emitQualifiedNameAsExpression(node, useFallback);
-                        break;
-                    default:
-                        emitNodeWithoutSourceMap(node);
-                        break;
-                }
-            }
-            function emitIndexedAccess(node) {
-                if (tryEmitConstantValue(node)) {
-                    return;
-                }
-                if (languageVersion === 2 &&
-                    node.expression.kind === 95 &&
-                    isInAsyncMethodWithSuperInES6(node)) {
-                    emitSuperAccessInAsyncMethod(node.expression, node.argumentExpression);
-                    return;
-                }
-                emit(node.expression);
-                write("[");
-                emit(node.argumentExpression);
-                write("]");
-            }
-            function hasSpreadElement(elements) {
-                return ts.forEach(elements, function (e) { return e.kind === 191; });
-            }
-            function skipParentheses(node) {
-                while (node.kind === 178 ||
-                    node.kind === 177 ||
-                    node.kind === 195 ||
-                    node.kind === 196) {
-                    node = node.expression;
-                }
-                return node;
-            }
-            function emitCallTarget(node) {
-                if (node.kind === 69 || node.kind === 97 || node.kind === 95) {
-                    emit(node);
-                    return node;
-                }
-                var temp = createAndRecordTempVariable(0);
-                write("(");
-                emit(temp);
-                write(" = ");
-                emit(node);
-                write(")");
-                return temp;
-            }
-            function emitCallWithSpread(node) {
-                var target;
-                var expr = skipParentheses(node.expression);
-                if (expr.kind === 172) {
-                    target = emitCallTarget(expr.expression);
-                    write(".");
-                    emit(expr.name);
-                }
-                else if (expr.kind === 173) {
-                    target = emitCallTarget(expr.expression);
-                    write("[");
-                    emit(expr.argumentExpression);
-                    write("]");
-                }
-                else if (expr.kind === 95) {
-                    target = expr;
-                    write("_super");
-                }
-                else {
-                    emit(node.expression);
-                }
-                write(".apply(");
-                if (target) {
-                    if (target.kind === 95) {
-                        emitThis(target);
-                    }
-                    else {
-                        emit(target);
-                    }
-                }
-                else {
-                    write("void 0");
-                }
-                write(", ");
-                emitListWithSpread(node.arguments, false, false, false, true);
-                write(")");
-            }
-            function isInAsyncMethodWithSuperInES6(node) {
-                if (languageVersion === 2) {
-                    var container = ts.getSuperContainer(node, false);
-                    if (container && resolver.getNodeCheckFlags(container) & (2048 | 4096)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function emitSuperAccessInAsyncMethod(superNode, argumentExpression) {
-                var container = ts.getSuperContainer(superNode, false);
-                var isSuperBinding = resolver.getNodeCheckFlags(container) & 4096;
-                write("_super(");
-                emit(argumentExpression);
-                write(isSuperBinding ? ").value" : ")");
-            }
-            function emitCallExpression(node) {
-                if (languageVersion < 2 && hasSpreadElement(node.arguments)) {
-                    emitCallWithSpread(node);
-                    return;
-                }
-                var expression = node.expression;
-                var superCall = false;
-                var isAsyncMethodWithSuper = false;
-                if (expression.kind === 95) {
-                    emitSuper(expression);
-                    superCall = true;
-                }
-                else {
-                    superCall = ts.isSuperPropertyOrElementAccess(expression);
-                    isAsyncMethodWithSuper = superCall && isInAsyncMethodWithSuperInES6(node);
-                    emit(expression);
-                }
-                if (superCall && (languageVersion < 2 || isAsyncMethodWithSuper)) {
-                    write(".call(");
-                    emitThis(expression);
-                    if (node.arguments.length) {
-                        write(", ");
-                        emitCommaList(node.arguments);
-                    }
-                    write(")");
-                }
-                else {
-                    write("(");
-                    emitCommaList(node.arguments);
-                    write(")");
-                }
-            }
-            function emitNewExpression(node) {
-                write("new ");
-                if (languageVersion === 1 &&
-                    node.arguments &&
-                    hasSpreadElement(node.arguments)) {
-                    write("(");
-                    var target = emitCallTarget(node.expression);
-                    write(".bind.apply(");
-                    emit(target);
-                    write(", [void 0].concat(");
-                    emitListWithSpread(node.arguments, false, false, false, false);
-                    write(")))");
-                    write("()");
-                }
-                else {
-                    emit(node.expression);
-                    if (node.arguments) {
-                        write("(");
-                        emitCommaList(node.arguments);
-                        write(")");
-                    }
-                }
-            }
-            function emitTaggedTemplateExpression(node) {
-                if (languageVersion >= 2) {
-                    emit(node.tag);
-                    write(" ");
-                    emit(node.template);
-                }
-                else {
-                    emitDownlevelTaggedTemplate(node);
-                }
-            }
-            function emitParenExpression(node) {
-                if (!ts.nodeIsSynthesized(node) && node.parent.kind !== 180) {
-                    if (node.expression.kind === 177 ||
-                        node.expression.kind === 195 ||
-                        node.expression.kind === 196) {
-                        var operand = node.expression.expression;
-                        while (operand.kind === 177 ||
-                            operand.kind === 195 ||
-                            operand.kind === 196) {
-                            operand = operand.expression;
-                        }
-                        if (operand.kind !== 185 &&
-                            operand.kind !== 183 &&
-                            operand.kind !== 182 &&
-                            operand.kind !== 181 &&
-                            operand.kind !== 186 &&
-                            operand.kind !== 175 &&
-                            !(operand.kind === 174 && node.parent.kind === 175) &&
-                            !(operand.kind === 179 && node.parent.kind === 174) &&
-                            !(operand.kind === 8 && node.parent.kind === 172)) {
-                            emit(operand);
-                            return;
-                        }
-                    }
-                }
-                write("(");
-                emit(node.expression);
-                write(")");
-            }
-            function emitDeleteExpression(node) {
-                write(ts.tokenToString(78));
-                write(" ");
-                emit(node.expression);
-            }
-            function emitVoidExpression(node) {
-                write(ts.tokenToString(103));
-                write(" ");
-                emit(node.expression);
-            }
-            function emitTypeOfExpression(node) {
-                write(ts.tokenToString(101));
-                write(" ");
-                emit(node.expression);
-            }
-            function isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node) {
-                if (!isCurrentFileSystemExternalModule() || node.kind !== 69 || ts.nodeIsSynthesized(node)) {
-                    return false;
-                }
-                var isVariableDeclarationOrBindingElement = node.parent && (node.parent.kind === 218 || node.parent.kind === 169);
-                var targetDeclaration = isVariableDeclarationOrBindingElement
-                    ? node.parent
-                    : resolver.getReferencedValueDeclaration(node);
-                return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, true);
-            }
-            function emitPrefixUnaryExpression(node) {
-                var exportChanged = (node.operator === 41 || node.operator === 42) &&
-                    isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
-                if (exportChanged) {
-                    write(exportFunctionForFile + "(\"");
-                    emitNodeWithoutSourceMap(node.operand);
-                    write("\", ");
-                }
-                write(ts.tokenToString(node.operator));
-                if (node.operand.kind === 185) {
-                    var operand = node.operand;
-                    if (node.operator === 35 && (operand.operator === 35 || operand.operator === 41)) {
-                        write(" ");
-                    }
-                    else if (node.operator === 36 && (operand.operator === 36 || operand.operator === 42)) {
-                        write(" ");
-                    }
-                }
-                emit(node.operand);
-                if (exportChanged) {
-                    write(")");
-                }
-            }
-            function emitPostfixUnaryExpression(node) {
-                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
-                if (exportChanged) {
-                    write("(" + exportFunctionForFile + "(\"");
-                    emitNodeWithoutSourceMap(node.operand);
-                    write("\", ");
-                    write(ts.tokenToString(node.operator));
-                    emit(node.operand);
-                    if (node.operator === 41) {
-                        write(") - 1)");
-                    }
-                    else {
-                        write(") + 1)");
-                    }
-                }
-                else {
-                    emit(node.operand);
-                    write(ts.tokenToString(node.operator));
-                }
-            }
-            function shouldHoistDeclarationInSystemJsModule(node) {
-                return isSourceFileLevelDeclarationInSystemJsModule(node, false);
-            }
-            function isSourceFileLevelDeclarationInSystemJsModule(node, isExported) {
-                if (!node || !isCurrentFileSystemExternalModule()) {
-                    return false;
-                }
-                var current = ts.getRootDeclaration(node).parent;
-                while (current) {
-                    if (current.kind === 256) {
-                        return !isExported || ((ts.getCombinedNodeFlags(node) & 1) !== 0);
-                    }
-                    else if (ts.isDeclaration(current)) {
-                        return false;
-                    }
-                    else {
-                        current = current.parent;
-                    }
-                }
-            }
-            function emitExponentiationOperator(node) {
-                var leftHandSideExpression = node.left;
-                if (node.operatorToken.kind === 60) {
-                    var synthesizedLHS = void 0;
-                    var shouldEmitParentheses = false;
-                    if (ts.isElementAccessExpression(leftHandSideExpression)) {
-                        shouldEmitParentheses = true;
-                        write("(");
-                        synthesizedLHS = ts.createSynthesizedNode(173, false);
-                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, false, false);
-                        synthesizedLHS.expression = identifier;
-                        if (leftHandSideExpression.argumentExpression.kind !== 8 &&
-                            leftHandSideExpression.argumentExpression.kind !== 9) {
-                            var tempArgumentExpression = createAndRecordTempVariable(268435456);
-                            synthesizedLHS.argumentExpression = tempArgumentExpression;
-                            emitAssignment(tempArgumentExpression, leftHandSideExpression.argumentExpression, true, leftHandSideExpression.expression);
-                        }
-                        else {
-                            synthesizedLHS.argumentExpression = leftHandSideExpression.argumentExpression;
-                        }
-                        write(", ");
-                    }
-                    else if (ts.isPropertyAccessExpression(leftHandSideExpression)) {
-                        shouldEmitParentheses = true;
-                        write("(");
-                        synthesizedLHS = ts.createSynthesizedNode(172, false);
-                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, false, false);
-                        synthesizedLHS.expression = identifier;
-                        synthesizedLHS.dotToken = leftHandSideExpression.dotToken;
-                        synthesizedLHS.name = leftHandSideExpression.name;
-                        write(", ");
-                    }
-                    emit(synthesizedLHS || leftHandSideExpression);
-                    write(" = ");
-                    write("Math.pow(");
-                    emit(synthesizedLHS || leftHandSideExpression);
-                    write(", ");
-                    emit(node.right);
-                    write(")");
-                    if (shouldEmitParentheses) {
-                        write(")");
-                    }
-                }
-                else {
-                    write("Math.pow(");
-                    emit(leftHandSideExpression);
-                    write(", ");
-                    emit(node.right);
-                    write(")");
-                }
-            }
-            function emitBinaryExpression(node) {
-                if (languageVersion < 2 && node.operatorToken.kind === 56 &&
-                    (node.left.kind === 171 || node.left.kind === 170)) {
-                    emitDestructuring(node, node.parent.kind === 202);
-                }
-                else {
-                    var exportChanged = node.operatorToken.kind >= 56 &&
-                        node.operatorToken.kind <= 68 &&
-                        isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left);
-                    if (exportChanged) {
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithoutSourceMap(node.left);
-                        write("\", ");
-                    }
-                    if (node.operatorToken.kind === 38 || node.operatorToken.kind === 60) {
-                        emitExponentiationOperator(node);
-                    }
-                    else {
-                        emit(node.left);
-                        var indentedBeforeOperator = indentIfOnDifferentLines(node, node.left, node.operatorToken, node.operatorToken.kind !== 24 ? " " : undefined);
-                        write(ts.tokenToString(node.operatorToken.kind));
-                        var indentedAfterOperator = indentIfOnDifferentLines(node, node.operatorToken, node.right, " ");
-                        emit(node.right);
-                        decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator);
-                    }
-                    if (exportChanged) {
-                        write(")");
-                    }
-                }
-            }
-            function synthesizedNodeStartsOnNewLine(node) {
-                return ts.nodeIsSynthesized(node) && node.startsOnNewLine;
-            }
-            function emitConditionalExpression(node) {
-                emit(node.condition);
-                var indentedBeforeQuestion = indentIfOnDifferentLines(node, node.condition, node.questionToken, " ");
-                write("?");
-                var indentedAfterQuestion = indentIfOnDifferentLines(node, node.questionToken, node.whenTrue, " ");
-                emit(node.whenTrue);
-                decreaseIndentIf(indentedBeforeQuestion, indentedAfterQuestion);
-                var indentedBeforeColon = indentIfOnDifferentLines(node, node.whenTrue, node.colonToken, " ");
-                write(":");
-                var indentedAfterColon = indentIfOnDifferentLines(node, node.colonToken, node.whenFalse, " ");
-                emit(node.whenFalse);
-                decreaseIndentIf(indentedBeforeColon, indentedAfterColon);
-            }
-            function decreaseIndentIf(value1, value2) {
-                if (value1) {
-                    decreaseIndent();
-                }
-                if (value2) {
-                    decreaseIndent();
-                }
-            }
-            function isSingleLineEmptyBlock(node) {
-                if (node && node.kind === 199) {
-                    var block = node;
-                    return block.statements.length === 0 && nodeEndIsOnSameLineAsNodeStart(block, block);
-                }
-            }
-            function emitBlock(node) {
-                if (isSingleLineEmptyBlock(node)) {
-                    emitToken(15, node.pos);
-                    write(" ");
-                    emitToken(16, node.statements.end);
-                    return;
-                }
-                emitToken(15, node.pos);
-                increaseIndent();
-                if (node.kind === 226) {
-                    ts.Debug.assert(node.parent.kind === 225);
-                    emitCaptureThisForNodeIfNecessary(node.parent);
-                }
-                emitLines(node.statements);
-                if (node.kind === 226) {
-                    emitTempDeclarations(true);
-                }
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.statements.end);
-            }
-            function emitEmbeddedStatement(node) {
-                if (node.kind === 199) {
-                    write(" ");
-                    emit(node);
-                }
-                else {
-                    increaseIndent();
-                    writeLine();
-                    emit(node);
-                    decreaseIndent();
-                }
-            }
-            function emitExpressionStatement(node) {
-                emitParenthesizedIf(node.expression, node.expression.kind === 180);
-                write(";");
-            }
-            function emitIfStatement(node) {
-                var endPos = emitToken(88, node.pos);
-                write(" ");
-                endPos = emitToken(17, endPos);
-                emit(node.expression);
-                emitToken(18, node.expression.end);
-                emitEmbeddedStatement(node.thenStatement);
-                if (node.elseStatement) {
-                    writeLine();
-                    emitToken(80, node.thenStatement.end);
-                    if (node.elseStatement.kind === 203) {
-                        write(" ");
-                        emit(node.elseStatement);
-                    }
-                    else {
-                        emitEmbeddedStatement(node.elseStatement);
-                    }
-                }
-            }
-            function emitDoStatement(node) {
-                emitLoop(node, emitDoStatementWorker);
-            }
-            function emitDoStatementWorker(node, loop) {
-                write("do");
-                if (loop) {
-                    emitConvertedLoopCall(loop, true);
-                }
-                else {
-                    emitNormalLoopBody(node, true);
-                }
-                if (node.statement.kind === 199) {
-                    write(" ");
-                }
-                else {
-                    writeLine();
-                }
-                write("while (");
-                emit(node.expression);
-                write(");");
-            }
-            function emitWhileStatement(node) {
-                emitLoop(node, emitWhileStatementWorker);
-            }
-            function emitWhileStatementWorker(node, loop) {
-                write("while (");
-                emit(node.expression);
-                write(")");
-                if (loop) {
-                    emitConvertedLoopCall(loop, true);
-                }
-                else {
-                    emitNormalLoopBody(node, true);
-                }
-            }
-            function tryEmitStartOfVariableDeclarationList(decl) {
-                if (shouldHoistVariable(decl, true)) {
-                    return false;
-                }
-                if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072) === 0) {
-                    for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) {
-                        var varDecl = _b[_a];
-                        hoistVariableDeclarationFromLoop(convertedLoopState, varDecl);
-                    }
-                    return false;
-                }
-                emitStart(decl);
-                if (decl && languageVersion >= 2) {
-                    if (ts.isLet(decl)) {
-                        write("let ");
-                    }
-                    else if (ts.isConst(decl)) {
-                        write("const ");
-                    }
-                    else {
-                        write("var ");
-                    }
-                }
-                else {
-                    write("var ");
-                }
-                return true;
-            }
-            function emitVariableDeclarationListSkippingUninitializedEntries(list) {
-                var started = false;
-                for (var _a = 0, _b = list.declarations; _a < _b.length; _a++) {
-                    var decl = _b[_a];
-                    if (!decl.initializer) {
-                        continue;
-                    }
-                    if (!started) {
-                        started = true;
-                    }
-                    else {
-                        write(", ");
-                    }
-                    emit(decl);
-                }
-                return started;
-            }
-            function shouldConvertLoopBody(node) {
-                return languageVersion < 2 &&
-                    (resolver.getNodeCheckFlags(node) & 65536) !== 0;
-            }
-            function emitLoop(node, loopEmitter) {
-                var shouldConvert = shouldConvertLoopBody(node);
-                if (!shouldConvert) {
-                    loopEmitter(node, undefined);
-                }
-                else {
-                    var loop = convertLoopBody(node);
-                    if (node.parent.kind === 214) {
-                        emitLabelAndColon(node.parent);
-                    }
-                    loopEmitter(node, loop);
-                }
-            }
-            function convertLoopBody(node) {
-                var functionName = makeUniqueName("_loop");
-                var loopInitializer;
-                switch (node.kind) {
-                    case 206:
-                    case 207:
-                    case 208:
-                        var initializer = node.initializer;
-                        if (initializer && initializer.kind === 219) {
-                            loopInitializer = node.initializer;
-                        }
-                        break;
-                }
-                var loopParameters;
-                var loopOutParameters;
-                if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3072)) {
-                    loopParameters = [];
-                    for (var _a = 0, _b = loopInitializer.declarations; _a < _b.length; _a++) {
-                        var varDeclaration = _b[_a];
-                        processVariableDeclaration(varDeclaration.name);
-                    }
-                }
-                var bodyIsBlock = node.statement.kind === 199;
-                var paramList = loopParameters ? loopParameters.join(", ") : "";
-                writeLine();
-                write("var " + functionName + " = function(" + paramList + ")");
-                var convertedOuterLoopState = convertedLoopState;
-                convertedLoopState = { loopOutParameters: loopOutParameters };
-                if (convertedOuterLoopState) {
-                    if (convertedOuterLoopState.argumentsName) {
-                        convertedLoopState.argumentsName = convertedOuterLoopState.argumentsName;
-                    }
-                    if (convertedOuterLoopState.thisName) {
-                        convertedLoopState.thisName = convertedOuterLoopState.thisName;
-                    }
-                    if (convertedOuterLoopState.hoistedLocalVariables) {
-                        convertedLoopState.hoistedLocalVariables = convertedOuterLoopState.hoistedLocalVariables;
-                    }
-                }
-                write(" {");
-                writeLine();
-                increaseIndent();
-                if (bodyIsBlock) {
-                    emitLines(node.statement.statements);
-                }
-                else {
-                    emit(node.statement);
-                }
-                writeLine();
-                copyLoopOutParameters(convertedLoopState, 1, true);
-                decreaseIndent();
-                writeLine();
-                write("};");
-                writeLine();
-                if (loopOutParameters) {
-                    write("var ");
-                    for (var i = 0; i < loopOutParameters.length; i++) {
-                        if (i !== 0) {
-                            write(", ");
-                        }
-                        write(loopOutParameters[i].outParamName);
-                    }
-                    write(";");
-                    writeLine();
-                }
-                if (convertedLoopState.argumentsName) {
-                    if (convertedOuterLoopState) {
-                        convertedOuterLoopState.argumentsName = convertedLoopState.argumentsName;
-                    }
-                    else {
-                        write("var " + convertedLoopState.argumentsName + " = arguments;");
-                        writeLine();
-                    }
-                }
-                if (convertedLoopState.thisName) {
-                    if (convertedOuterLoopState) {
-                        convertedOuterLoopState.thisName = convertedLoopState.thisName;
-                    }
-                    else {
-                        write("var " + convertedLoopState.thisName + " = this;");
-                        writeLine();
-                    }
-                }
-                if (convertedLoopState.hoistedLocalVariables) {
-                    if (convertedOuterLoopState) {
-                        convertedOuterLoopState.hoistedLocalVariables = convertedLoopState.hoistedLocalVariables;
-                    }
-                    else {
-                        write("var ");
-                        var seen = void 0;
-                        for (var _c = 0, _d = convertedLoopState.hoistedLocalVariables; _c < _d.length; _c++) {
-                            var id = _d[_c];
-                            if (!seen) {
-                                seen = {};
-                            }
-                            else {
-                                write(", ");
-                            }
-                            if (!ts.hasProperty(seen, id.text)) {
-                                emit(id);
-                                seen[id.text] = id.text;
-                            }
-                        }
-                        write(";");
-                        writeLine();
-                    }
-                }
-                var currentLoopState = convertedLoopState;
-                convertedLoopState = convertedOuterLoopState;
-                return { functionName: functionName, paramList: paramList, state: currentLoopState };
-                function processVariableDeclaration(name) {
-                    if (name.kind === 69) {
-                        var nameText = isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(name)
-                            ? getGeneratedNameForNode(name)
-                            : name.text;
-                        loopParameters.push(nameText);
-                        if (resolver.getNodeCheckFlags(name.parent) & 2097152) {
-                            var reassignedVariable = { originalName: name, outParamName: makeUniqueName("out_" + nameText) };
-                            (loopOutParameters || (loopOutParameters = [])).push(reassignedVariable);
-                        }
-                    }
-                    else {
-                        for (var _a = 0, _b = name.elements; _a < _b.length; _a++) {
-                            var element = _b[_a];
-                            processVariableDeclaration(element.name);
-                        }
-                    }
-                }
-            }
-            function emitNormalLoopBody(node, emitAsEmbeddedStatement) {
-                var saveAllowedNonLabeledJumps;
-                if (convertedLoopState) {
-                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-                    convertedLoopState.allowedNonLabeledJumps = 2 | 4;
-                }
-                if (emitAsEmbeddedStatement) {
-                    emitEmbeddedStatement(node.statement);
-                }
-                else if (node.statement.kind === 199) {
-                    emitLines(node.statement.statements);
-                }
-                else {
-                    writeLine();
-                    emit(node.statement);
-                }
-                if (convertedLoopState) {
-                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
-                }
-            }
-            function copyLoopOutParameters(state, copyDirection, emitAsStatements) {
-                if (state.loopOutParameters) {
-                    for (var _a = 0, _b = state.loopOutParameters; _a < _b.length; _a++) {
-                        var outParam = _b[_a];
-                        if (copyDirection === 0) {
-                            emitIdentifier(outParam.originalName);
-                            write(" = " + outParam.outParamName);
-                        }
-                        else {
-                            write(outParam.outParamName + " = ");
-                            emitIdentifier(outParam.originalName);
-                        }
-                        if (emitAsStatements) {
-                            write(";");
-                            writeLine();
-                        }
-                        else {
-                            write(", ");
-                        }
-                    }
-                }
-            }
-            function emitConvertedLoopCall(loop, emitAsBlock) {
-                if (emitAsBlock) {
-                    write(" {");
-                    writeLine();
-                    increaseIndent();
-                }
-                var isSimpleLoop = !(loop.state.nonLocalJumps & ~4) &&
-                    !loop.state.labeledNonLocalBreaks &&
-                    !loop.state.labeledNonLocalContinues;
-                var loopResult = makeUniqueName("state");
-                if (!isSimpleLoop) {
-                    write("var " + loopResult + " = ");
-                }
-                write(loop.functionName + "(" + loop.paramList + ");");
-                writeLine();
-                copyLoopOutParameters(loop.state, 0, true);
-                if (!isSimpleLoop) {
-                    writeLine();
-                    if (loop.state.nonLocalJumps & 8) {
-                        write("if (typeof " + loopResult + " === \"object\") ");
-                        if (convertedLoopState) {
-                            write("return " + loopResult + ";");
-                            convertedLoopState.nonLocalJumps |= 8;
-                        }
-                        else {
-                            write("return " + loopResult + ".value;");
-                        }
-                        writeLine();
-                    }
-                    if (loop.state.nonLocalJumps & 2) {
-                        write("if (" + loopResult + " === \"break\") break;");
-                        writeLine();
-                    }
-                    emitDispatchTableForLabeledJumps(loopResult, loop.state, convertedLoopState);
-                }
-                if (emitAsBlock) {
-                    writeLine();
-                    decreaseIndent();
-                    write("}");
-                }
-                function emitDispatchTableForLabeledJumps(loopResultVariable, currentLoop, outerLoop) {
-                    if (!currentLoop.labeledNonLocalBreaks && !currentLoop.labeledNonLocalContinues) {
-                        return;
-                    }
-                    write("switch(" + loopResultVariable + ") {");
-                    increaseIndent();
-                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalBreaks, true, loopResultVariable, outerLoop);
-                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalContinues, false, loopResultVariable, outerLoop);
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-                function emitDispatchEntriesForLabeledJumps(table, isBreak, loopResultVariable, outerLoop) {
-                    if (!table) {
-                        return;
-                    }
-                    for (var labelText in table) {
-                        var labelMarker = table[labelText];
-                        writeLine();
-                        write("case \"" + labelMarker + "\": ");
-                        if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) {
-                            if (isBreak) {
-                                write("break ");
-                            }
-                            else {
-                                write("continue ");
-                            }
-                            write(labelText + ";");
-                        }
-                        else {
-                            setLabeledJump(outerLoop, isBreak, labelText, labelMarker);
-                            write("return " + loopResultVariable + ";");
-                        }
-                    }
-                }
-            }
-            function emitForStatement(node) {
-                emitLoop(node, emitForStatementWorker);
-            }
-            function emitForStatementWorker(node, loop) {
-                var endPos = emitToken(86, node.pos);
-                write(" ");
-                endPos = emitToken(17, endPos);
-                if (node.initializer && node.initializer.kind === 219) {
-                    var variableDeclarationList = node.initializer;
-                    var startIsEmitted = tryEmitStartOfVariableDeclarationList(variableDeclarationList);
-                    if (startIsEmitted) {
-                        emitCommaList(variableDeclarationList.declarations);
-                    }
-                    else {
-                        emitVariableDeclarationListSkippingUninitializedEntries(variableDeclarationList);
-                    }
-                }
-                else if (node.initializer) {
-                    emit(node.initializer);
-                }
-                write(";");
-                emitOptional(" ", node.condition);
-                write(";");
-                emitOptional(" ", node.incrementor);
-                write(")");
-                if (loop) {
-                    emitConvertedLoopCall(loop, true);
-                }
-                else {
-                    emitNormalLoopBody(node, true);
-                }
-            }
-            function emitForInOrForOfStatement(node) {
-                if (languageVersion < 2 && node.kind === 208) {
-                    emitLoop(node, emitDownLevelForOfStatementWorker);
-                }
-                else {
-                    emitLoop(node, emitForInOrForOfStatementWorker);
-                }
-            }
-            function emitForInOrForOfStatementWorker(node, loop) {
-                var endPos = emitToken(86, node.pos);
-                write(" ");
-                endPos = emitToken(17, endPos);
-                if (node.initializer.kind === 219) {
-                    var variableDeclarationList = node.initializer;
-                    if (variableDeclarationList.declarations.length >= 1) {
-                        tryEmitStartOfVariableDeclarationList(variableDeclarationList);
-                        emit(variableDeclarationList.declarations[0]);
-                    }
-                }
-                else {
-                    emit(node.initializer);
-                }
-                if (node.kind === 207) {
-                    write(" in ");
-                }
-                else {
-                    write(" of ");
-                }
-                emit(node.expression);
-                emitToken(18, node.expression.end);
-                if (loop) {
-                    emitConvertedLoopCall(loop, true);
-                }
-                else {
-                    emitNormalLoopBody(node, true);
-                }
-            }
-            function emitDownLevelForOfStatementWorker(node, loop) {
-                var endPos = emitToken(86, node.pos);
-                write(" ");
-                endPos = emitToken(17, endPos);
-                var counter = createTempVariable(268435456);
-                var rhsReference = ts.createSynthesizedNode(69);
-                rhsReference.text = node.expression.kind === 69 ?
-                    makeUniqueName(node.expression.text) :
-                    makeTempVariableName(0);
-                emitStart(node.expression);
-                write("var ");
-                emitNodeWithoutSourceMap(counter);
-                write(" = 0");
-                emitEnd(node.expression);
-                write(", ");
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(rhsReference);
-                write(" = ");
-                emitNodeWithoutSourceMap(node.expression);
-                emitEnd(node.expression);
-                write("; ");
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(counter);
-                write(" < ");
-                emitNodeWithCommentsAndWithoutSourcemap(rhsReference);
-                write(".length");
-                emitEnd(node.expression);
-                write("; ");
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(counter);
-                write("++");
-                emitEnd(node.expression);
-                emitToken(18, node.expression.end);
-                write(" {");
-                writeLine();
-                increaseIndent();
-                var rhsIterationValue = createElementAccessExpression(rhsReference, counter);
-                emitStart(node.initializer);
-                if (node.initializer.kind === 219) {
-                    write("var ");
-                    var variableDeclarationList = node.initializer;
-                    if (variableDeclarationList.declarations.length > 0) {
-                        var declaration = variableDeclarationList.declarations[0];
-                        if (ts.isBindingPattern(declaration.name)) {
-                            emitDestructuring(declaration, false, rhsIterationValue);
-                        }
-                        else {
-                            emitNodeWithCommentsAndWithoutSourcemap(declaration);
-                            write(" = ");
-                            emitNodeWithoutSourceMap(rhsIterationValue);
-                        }
-                    }
-                    else {
-                        emitNodeWithoutSourceMap(createTempVariable(0));
-                        write(" = ");
-                        emitNodeWithoutSourceMap(rhsIterationValue);
-                    }
-                }
-                else {
-                    var assignmentExpression = createBinaryExpression(node.initializer, 56, rhsIterationValue, false);
-                    if (node.initializer.kind === 170 || node.initializer.kind === 171) {
-                        emitDestructuring(assignmentExpression, true, undefined);
-                    }
-                    else {
-                        emitNodeWithCommentsAndWithoutSourcemap(assignmentExpression);
-                    }
-                }
-                emitEnd(node.initializer);
-                write(";");
-                if (loop) {
-                    writeLine();
-                    emitConvertedLoopCall(loop, false);
-                }
-                else {
-                    emitNormalLoopBody(node, false);
-                }
-                writeLine();
-                decreaseIndent();
-                write("}");
-            }
-            function emitBreakOrContinueStatement(node) {
-                if (convertedLoopState) {
-                    var jump = node.kind === 210 ? 2 : 4;
-                    var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) ||
-                        (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
-                    if (!canUseBreakOrContinue) {
-                        write("return ");
-                        copyLoopOutParameters(convertedLoopState, 1, false);
-                        if (!node.label) {
-                            if (node.kind === 210) {
-                                convertedLoopState.nonLocalJumps |= 2;
-                                write("\"break\";");
-                            }
-                            else {
-                                convertedLoopState.nonLocalJumps |= 4;
-                                write("\"continue\";");
-                            }
-                        }
-                        else {
-                            var labelMarker = void 0;
-                            if (node.kind === 210) {
-                                labelMarker = "break-" + node.label.text;
-                                setLabeledJump(convertedLoopState, true, node.label.text, labelMarker);
-                            }
-                            else {
-                                labelMarker = "continue-" + node.label.text;
-                                setLabeledJump(convertedLoopState, false, node.label.text, labelMarker);
-                            }
-                            write("\"" + labelMarker + "\";");
-                        }
-                        return;
-                    }
-                }
-                emitToken(node.kind === 210 ? 70 : 75, node.pos);
-                emitOptional(" ", node.label);
-                write(";");
-            }
-            function emitReturnStatement(node) {
-                if (convertedLoopState) {
-                    convertedLoopState.nonLocalJumps |= 8;
-                    write("return { value: ");
-                    if (node.expression) {
-                        emit(node.expression);
-                    }
-                    else {
-                        write("void 0");
-                    }
-                    write(" };");
-                    return;
-                }
-                emitToken(94, node.pos);
-                emitOptional(" ", node.expression);
-                write(";");
-            }
-            function emitWithStatement(node) {
-                write("with (");
-                emit(node.expression);
-                write(")");
-                emitEmbeddedStatement(node.statement);
-            }
-            function emitSwitchStatement(node) {
-                var endPos = emitToken(96, node.pos);
-                write(" ");
-                emitToken(17, endPos);
-                emit(node.expression);
-                endPos = emitToken(18, node.expression.end);
-                write(" ");
-                var saveAllowedNonLabeledJumps;
-                if (convertedLoopState) {
-                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-                    convertedLoopState.allowedNonLabeledJumps |= 2;
-                }
-                emitCaseBlock(node.caseBlock, endPos);
-                if (convertedLoopState) {
-                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
-                }
-            }
-            function emitCaseBlock(node, startPos) {
-                emitToken(15, startPos);
-                increaseIndent();
-                emitLines(node.clauses);
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.clauses.end);
-            }
-            function nodeStartPositionsAreOnSameLine(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node1.pos)) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
-            }
-            function nodeEndPositionsAreOnSameLine(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, node2.end);
-            }
-            function nodeEndIsOnSameLineAsNodeStart(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
-            }
-            function emitCaseOrDefaultClause(node) {
-                if (node.kind === 249) {
-                    write("case ");
-                    emit(node.expression);
-                    write(":");
-                }
-                else {
-                    write("default:");
-                }
-                if (node.statements.length === 1 && nodeStartPositionsAreOnSameLine(node, node.statements[0])) {
-                    write(" ");
-                    emit(node.statements[0]);
-                }
-                else {
-                    increaseIndent();
-                    emitLines(node.statements);
-                    decreaseIndent();
-                }
-            }
-            function emitThrowStatement(node) {
-                write("throw ");
-                emit(node.expression);
-                write(";");
-            }
-            function emitTryStatement(node) {
-                write("try ");
-                emit(node.tryBlock);
-                emit(node.catchClause);
-                if (node.finallyBlock) {
-                    writeLine();
-                    write("finally ");
-                    emit(node.finallyBlock);
-                }
-            }
-            function emitCatchClause(node) {
-                writeLine();
-                var endPos = emitToken(72, node.pos);
-                write(" ");
-                emitToken(17, endPos);
-                emit(node.variableDeclaration);
-                emitToken(18, node.variableDeclaration ? node.variableDeclaration.end : endPos);
-                write(" ");
-                emitBlock(node.block);
-            }
-            function emitDebuggerStatement(node) {
-                emitToken(76, node.pos);
-                write(";");
-            }
-            function emitLabelAndColon(node) {
-                emit(node.label);
-                write(": ");
-            }
-            function emitLabeledStatement(node) {
-                if (!ts.isIterationStatement(node.statement, false) || !shouldConvertLoopBody(node.statement)) {
-                    emitLabelAndColon(node);
-                }
-                if (convertedLoopState) {
-                    if (!convertedLoopState.labels) {
-                        convertedLoopState.labels = {};
-                    }
-                    convertedLoopState.labels[node.label.text] = node.label.text;
-                }
-                emit(node.statement);
-                if (convertedLoopState) {
-                    convertedLoopState.labels[node.label.text] = undefined;
-                }
-            }
-            function getContainingModule(node) {
-                do {
-                    node = node.parent;
-                } while (node && node.kind !== 225);
-                return node;
-            }
-            function emitContainingModuleName(node) {
-                var container = getContainingModule(node);
-                write(container ? getGeneratedNameForNode(container) : "exports");
-            }
-            function emitModuleMemberName(node) {
-                emitStart(node.name);
-                if (ts.getCombinedNodeFlags(node) & 1) {
-                    var container = getContainingModule(node);
-                    if (container) {
-                        write(getGeneratedNameForNode(container));
-                        write(".");
-                    }
-                    else if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
-                        write("exports.");
-                    }
-                }
-                emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                emitEnd(node.name);
-            }
-            function createVoidZero() {
-                var zero = ts.createSynthesizedNode(8);
-                zero.text = "0";
-                var result = ts.createSynthesizedNode(183);
-                result.expression = zero;
-                return result;
-            }
-            function emitEs6ExportDefaultCompat(node) {
-                if (node.parent.kind === 256) {
-                    ts.Debug.assert(!!(node.flags & 512) || node.kind === 235);
-                    if (modulekind === ts.ModuleKind.CommonJS || modulekind === ts.ModuleKind.AMD || modulekind === ts.ModuleKind.UMD) {
-                        if (!isEs6Module) {
-                            if (languageVersion !== 0) {
-                                write('Object.defineProperty(exports, "__esModule", { value: true });');
-                                writeLine();
-                            }
-                            else {
-                                write("exports.__esModule = true;");
-                                writeLine();
-                            }
-                        }
-                    }
-                }
-            }
-            function emitExportMemberAssignment(node) {
-                if (node.flags & 1) {
-                    writeLine();
-                    emitStart(node);
-                    if (modulekind === ts.ModuleKind.System && node.parent === currentSourceFile) {
-                        write(exportFunctionForFile + "(\"");
-                        if (node.flags & 512) {
-                            write("default");
-                        }
-                        else {
-                            emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                        }
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(")");
-                    }
-                    else {
-                        if (node.flags & 512) {
-                            emitEs6ExportDefaultCompat(node);
-                            if (languageVersion === 0) {
-                                write('exports["default"]');
-                            }
-                            else {
-                                write("exports.default");
-                            }
-                        }
-                        else {
-                            emitModuleMemberName(node);
-                        }
-                        write(" = ");
-                        emitDeclarationName(node);
-                    }
-                    emitEnd(node);
-                    write(";");
-                }
-            }
-            function emitExportMemberAssignments(name) {
-                if (modulekind === ts.ModuleKind.System) {
-                    return;
-                }
-                if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
-                    for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
-                        var specifier = _b[_a];
-                        writeLine();
-                        emitStart(specifier.name);
-                        emitContainingModuleName(specifier);
-                        write(".");
-                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                        emitEnd(specifier.name);
-                        write(" = ");
-                        emitExpressionIdentifier(name);
-                        write(";");
-                    }
-                }
-            }
-            function emitExportSpecifierInSystemModule(specifier) {
-                ts.Debug.assert(modulekind === ts.ModuleKind.System);
-                if (!resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name) && !resolver.isValueAliasDeclaration(specifier)) {
-                    return;
-                }
-                writeLine();
-                emitStart(specifier.name);
-                write(exportFunctionForFile + "(\"");
-                emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                write("\", ");
-                emitExpressionIdentifier(specifier.propertyName || specifier.name);
-                write(")");
-                emitEnd(specifier.name);
-                write(";");
-            }
-            function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) {
-                if (shouldEmitCommaBeforeAssignment) {
-                    write(", ");
-                }
-                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name);
-                if (exportChanged) {
-                    write(exportFunctionForFile + "(\"");
-                    emitNodeWithCommentsAndWithoutSourcemap(name);
-                    write("\", ");
-                }
-                var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 || name.parent.kind === 169);
-                emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap);
-                withTemporaryNoSourceMap(function () {
-                    if (isVariableDeclarationOrBindingElement) {
-                        emitModuleMemberName(name.parent);
-                    }
-                    else {
-                        emit(name);
-                    }
-                    write(" = ");
-                    emit(value);
-                });
-                emitEnd(nodeForSourceMap, true);
-                if (exportChanged) {
-                    write(")");
-                }
-            }
-            function emitTempVariableAssignment(expression, canDefineTempVariablesInPlace, shouldEmitCommaBeforeAssignment, sourceMapNode) {
-                var identifier = createTempVariable(0);
-                if (!canDefineTempVariablesInPlace) {
-                    recordTempDeclaration(identifier);
-                }
-                emitAssignment(identifier, expression, shouldEmitCommaBeforeAssignment, sourceMapNode || expression.parent);
-                return identifier;
-            }
-            function isFirstVariableDeclaration(root) {
-                return root.kind === 218 &&
-                    root.parent.kind === 219 &&
-                    root.parent.declarations[0] === root;
-            }
-            function emitDestructuring(root, isAssignmentExpressionStatement, value) {
-                var emitCount = 0;
-                var canDefineTempVariablesInPlace = false;
-                if (root.kind === 218) {
-                    var isExported = ts.getCombinedNodeFlags(root) & 1;
-                    var isSourceLevelForSystemModuleKind = shouldHoistDeclarationInSystemJsModule(root);
-                    canDefineTempVariablesInPlace = !isExported && !isSourceLevelForSystemModuleKind;
-                }
-                else if (root.kind === 142) {
-                    canDefineTempVariablesInPlace = true;
-                }
-                if (root.kind === 187) {
-                    emitAssignmentExpression(root);
-                }
-                else {
-                    ts.Debug.assert(!isAssignmentExpressionStatement);
-                    if (isFirstVariableDeclaration(root)) {
-                        sourceMap.changeEmitSourcePos();
-                    }
-                    emitBindingElement(root, value);
-                }
-                function ensureIdentifier(expr, reuseIdentifierExpressions, sourceMapNode) {
-                    if (expr.kind === 69 && reuseIdentifierExpressions) {
-                        return expr;
-                    }
-                    var identifier = emitTempVariableAssignment(expr, canDefineTempVariablesInPlace, emitCount > 0, sourceMapNode);
-                    emitCount++;
-                    return identifier;
-                }
-                function createDefaultValueCheck(value, defaultValue, sourceMapNode) {
-                    value = ensureIdentifier(value, true, sourceMapNode);
-                    var equals = ts.createSynthesizedNode(187);
-                    equals.left = value;
-                    equals.operatorToken = ts.createSynthesizedNode(32);
-                    equals.right = createVoidZero();
-                    return createConditionalExpression(equals, defaultValue, value);
-                }
-                function createConditionalExpression(condition, whenTrue, whenFalse) {
-                    var cond = ts.createSynthesizedNode(188);
-                    cond.condition = condition;
-                    cond.questionToken = ts.createSynthesizedNode(53);
-                    cond.whenTrue = whenTrue;
-                    cond.colonToken = ts.createSynthesizedNode(54);
-                    cond.whenFalse = whenFalse;
-                    return cond;
-                }
-                function createNumericLiteral(value) {
-                    var node = ts.createSynthesizedNode(8);
-                    node.text = "" + value;
-                    return node;
-                }
-                function createPropertyAccessForDestructuringProperty(object, propName) {
-                    var index;
-                    var nameIsComputed = propName.kind === 140;
-                    if (nameIsComputed) {
-                        index = ensureIdentifier(propName.expression, false, propName);
-                    }
-                    else {
-                        index = ts.createSynthesizedNode(propName.kind);
-                        index.text = ts.unescapeIdentifier(propName.text);
-                    }
-                    return !nameIsComputed && index.kind === 69
-                        ? createPropertyAccessExpression(object, index)
-                        : createElementAccessExpression(object, index);
-                }
-                function createSliceCall(value, sliceIndex) {
-                    var call = ts.createSynthesizedNode(174);
-                    var sliceIdentifier = ts.createSynthesizedNode(69);
-                    sliceIdentifier.text = "slice";
-                    call.expression = createPropertyAccessExpression(value, sliceIdentifier);
-                    call.arguments = ts.createSynthesizedNodeArray();
-                    call.arguments[0] = createNumericLiteral(sliceIndex);
-                    return call;
-                }
-                function emitObjectLiteralAssignment(target, value, sourceMapNode) {
-                    var properties = target.properties;
-                    if (properties.length !== 1) {
-                        value = ensureIdentifier(value, true, sourceMapNode);
-                    }
-                    for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) {
-                        var p = properties_5[_a];
-                        if (p.kind === 253 || p.kind === 254) {
-                            var propName = p.name;
-                            var target_1 = p.kind === 254 ? p : p.initializer || propName;
-                            emitDestructuringAssignment(target_1, createPropertyAccessForDestructuringProperty(value, propName), p);
-                        }
-                    }
-                }
-                function emitArrayLiteralAssignment(target, value, sourceMapNode) {
-                    var elements = target.elements;
-                    if (elements.length !== 1) {
-                        value = ensureIdentifier(value, true, sourceMapNode);
-                    }
-                    for (var i = 0; i < elements.length; i++) {
-                        var e = elements[i];
-                        if (e.kind !== 193) {
-                            if (e.kind !== 191) {
-                                emitDestructuringAssignment(e, createElementAccessExpression(value, createNumericLiteral(i)), e);
-                            }
-                            else if (i === elements.length - 1) {
-                                emitDestructuringAssignment(e.expression, createSliceCall(value, i), e);
-                            }
-                        }
-                    }
-                }
-                function emitDestructuringAssignment(target, value, sourceMapNode) {
-                    if (target.kind === 254) {
-                        if (target.objectAssignmentInitializer) {
-                            value = createDefaultValueCheck(value, target.objectAssignmentInitializer, sourceMapNode);
-                        }
-                        target = target.name;
-                    }
-                    else if (target.kind === 187 && target.operatorToken.kind === 56) {
-                        value = createDefaultValueCheck(value, target.right, sourceMapNode);
-                        target = target.left;
-                    }
-                    if (target.kind === 171) {
-                        emitObjectLiteralAssignment(target, value, sourceMapNode);
-                    }
-                    else if (target.kind === 170) {
-                        emitArrayLiteralAssignment(target, value, sourceMapNode);
-                    }
-                    else {
-                        emitAssignment(target, value, emitCount > 0, sourceMapNode);
-                        emitCount++;
-                    }
-                }
-                function emitAssignmentExpression(root) {
-                    var target = root.left;
-                    var value = root.right;
-                    if (ts.isEmptyObjectLiteralOrArrayLiteral(target)) {
-                        emit(value);
-                    }
-                    else if (isAssignmentExpressionStatement) {
-                        emitDestructuringAssignment(target, value, ts.nodeIsSynthesized(root) ? target : root);
-                    }
-                    else {
-                        if (root.parent.kind !== 178) {
-                            write("(");
-                        }
-                        value = ensureIdentifier(value, true, root);
-                        emitDestructuringAssignment(target, value, root);
-                        write(", ");
-                        emit(value);
-                        if (root.parent.kind !== 178) {
-                            write(")");
-                        }
-                    }
-                }
-                function emitBindingElement(target, value) {
-                    if (target.initializer) {
-                        value = value ? createDefaultValueCheck(value, target.initializer, target) : target.initializer;
-                    }
-                    else if (!value) {
-                        value = createVoidZero();
-                    }
-                    if (ts.isBindingPattern(target.name)) {
-                        var pattern = target.name;
-                        var elements = pattern.elements;
-                        var numElements = elements.length;
-                        if (numElements !== 1) {
-                            value = ensureIdentifier(value, numElements !== 0, target);
-                        }
-                        for (var i = 0; i < numElements; i++) {
-                            var element = elements[i];
-                            if (pattern.kind === 167) {
-                                var propName = element.propertyName || element.name;
-                                emitBindingElement(element, createPropertyAccessForDestructuringProperty(value, propName));
-                            }
-                            else if (element.kind !== 193) {
-                                if (!element.dotDotDotToken) {
-                                    emitBindingElement(element, createElementAccessExpression(value, createNumericLiteral(i)));
-                                }
-                                else if (i === numElements - 1) {
-                                    emitBindingElement(element, createSliceCall(value, i));
-                                }
-                            }
-                        }
-                    }
-                    else {
-                        emitAssignment(target.name, value, emitCount > 0, target);
-                        emitCount++;
-                    }
-                }
-            }
-            function emitVariableDeclaration(node) {
-                if (ts.isBindingPattern(node.name)) {
-                    var isExported = ts.getCombinedNodeFlags(node) & 1;
-                    if (languageVersion >= 2 && (!isExported || modulekind === ts.ModuleKind.ES6)) {
-                        var isTopLevelDeclarationInSystemModule = modulekind === ts.ModuleKind.System &&
-                            shouldHoistVariable(node, true);
-                        if (isTopLevelDeclarationInSystemModule) {
-                            write("(");
-                        }
-                        emit(node.name);
-                        emitOptional(" = ", node.initializer);
-                        if (isTopLevelDeclarationInSystemModule) {
-                            write(")");
-                        }
-                    }
-                    else {
-                        emitDestructuring(node, false);
-                    }
-                }
-                else {
-                    var initializer = node.initializer;
-                    if (!initializer &&
-                        languageVersion < 2 &&
-                        node.name.kind === 69) {
-                        var container = ts.getEnclosingBlockScopeContainer(node);
-                        var flags = resolver.getNodeCheckFlags(node);
-                        var isCapturedInFunction = flags & 131072;
-                        var isDeclaredInLoop = flags & 262144;
-                        var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(container) ||
-                            (isCapturedInFunction && isDeclaredInLoop && container.kind === 199 && ts.isIterationStatement(container.parent, false));
-                        var emittedAsNestedLetDeclaration = ts.getCombinedNodeFlags(node) & 1024 &&
-                            !emittedAsTopLevel;
-                        var emitExplicitInitializer = emittedAsNestedLetDeclaration &&
-                            container.kind !== 207 &&
-                            container.kind !== 208 &&
-                            (!resolver.isDeclarationWithCollidingName(node) ||
-                                (isDeclaredInLoop && !isCapturedInFunction && !ts.isIterationStatement(container, false)));
-                        if (emitExplicitInitializer) {
-                            initializer = createVoidZero();
-                        }
-                    }
-                    var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.name);
-                    if (exportChanged) {
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                        write("\", ");
-                    }
-                    emitModuleMemberName(node);
-                    emitOptional(" = ", initializer);
-                    if (exportChanged) {
-                        write(")");
-                    }
-                }
-            }
-            function emitExportVariableAssignments(node) {
-                if (node.kind === 193) {
-                    return;
-                }
-                var name = node.name;
-                if (name.kind === 69) {
-                    emitExportMemberAssignments(name);
-                }
-                else if (ts.isBindingPattern(name)) {
-                    ts.forEach(name.elements, emitExportVariableAssignments);
-                }
-            }
-            function isES6ExportedDeclaration(node) {
-                return !!(node.flags & 1) &&
-                    modulekind === ts.ModuleKind.ES6 &&
-                    node.parent.kind === 256;
-            }
-            function emitVariableStatement(node) {
-                var startIsEmitted = false;
-                if (node.flags & 1) {
-                    if (isES6ExportedDeclaration(node)) {
-                        write("export ");
-                        startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
-                    }
-                }
-                else {
-                    startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
-                }
-                if (startIsEmitted) {
-                    emitCommaList(node.declarationList.declarations);
-                    write(";");
-                }
-                else {
-                    var atLeastOneItem = emitVariableDeclarationListSkippingUninitializedEntries(node.declarationList);
-                    if (atLeastOneItem) {
-                        write(";");
-                    }
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
-                    ts.forEach(node.declarationList.declarations, emitExportVariableAssignments);
-                }
-            }
-            function shouldEmitLeadingAndTrailingCommentsForVariableStatement(node) {
-                if (!(node.flags & 1)) {
-                    return true;
-                }
-                if (isES6ExportedDeclaration(node)) {
-                    return true;
-                }
-                for (var _a = 0, _b = node.declarationList.declarations; _a < _b.length; _a++) {
-                    var declaration = _b[_a];
-                    if (declaration.initializer) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function emitParameter(node) {
-                if (languageVersion < 2) {
-                    if (ts.isBindingPattern(node.name)) {
-                        var name_28 = createTempVariable(0);
-                        if (!tempParameters) {
-                            tempParameters = [];
-                        }
-                        tempParameters.push(name_28);
-                        emit(name_28);
-                    }
-                    else {
-                        emit(node.name);
-                    }
-                }
-                else {
-                    if (node.dotDotDotToken) {
-                        write("...");
-                    }
-                    emit(node.name);
-                    emitOptional(" = ", node.initializer);
-                }
-            }
-            function emitDefaultValueAssignments(node) {
-                if (languageVersion < 2) {
-                    var tempIndex_1 = 0;
-                    ts.forEach(node.parameters, function (parameter) {
-                        if (parameter.dotDotDotToken) {
-                            return;
-                        }
-                        var paramName = parameter.name, initializer = parameter.initializer;
-                        if (ts.isBindingPattern(paramName)) {
-                            var hasBindingElements = paramName.elements.length > 0;
-                            if (hasBindingElements || initializer) {
-                                writeLine();
-                                write("var ");
-                                if (hasBindingElements) {
-                                    emitDestructuring(parameter, false, tempParameters[tempIndex_1]);
-                                }
-                                else {
-                                    emit(tempParameters[tempIndex_1]);
-                                    write(" = ");
-                                    emit(initializer);
-                                }
-                                write(";");
-                                tempIndex_1++;
-                            }
-                        }
-                        else if (initializer) {
-                            writeLine();
-                            emitStart(parameter);
-                            write("if (");
-                            emitNodeWithoutSourceMap(paramName);
-                            write(" === void 0)");
-                            emitEnd(parameter);
-                            write(" { ");
-                            emitStart(parameter);
-                            emitNodeWithCommentsAndWithoutSourcemap(paramName);
-                            write(" = ");
-                            emitNodeWithCommentsAndWithoutSourcemap(initializer);
-                            emitEnd(parameter);
-                            write("; }");
-                        }
-                    });
-                }
-            }
-            function emitRestParameter(node) {
-                if (languageVersion < 2 && ts.hasDeclaredRestParameter(node)) {
-                    var restIndex = node.parameters.length - 1;
-                    var restParam = node.parameters[restIndex];
-                    if (ts.isBindingPattern(restParam.name)) {
-                        return;
-                    }
-                    var tempName = createTempVariable(268435456).text;
-                    writeLine();
-                    emitLeadingComments(restParam);
-                    emitStart(restParam);
-                    write("var ");
-                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
-                    write(" = [];");
-                    emitEnd(restParam);
-                    emitTrailingComments(restParam);
-                    writeLine();
-                    write("for (");
-                    emitStart(restParam);
-                    write("var " + tempName + " = " + restIndex + ";");
-                    emitEnd(restParam);
-                    write(" ");
-                    emitStart(restParam);
-                    write(tempName + " < arguments.length;");
-                    emitEnd(restParam);
-                    write(" ");
-                    emitStart(restParam);
-                    write(tempName + "++");
-                    emitEnd(restParam);
-                    write(") {");
-                    increaseIndent();
-                    writeLine();
-                    emitStart(restParam);
-                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
-                    write("[" + tempName + " - " + restIndex + "] = arguments[" + tempName + "];");
-                    emitEnd(restParam);
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function emitAccessor(node) {
-                write(node.kind === 149 ? "get " : "set ");
-                emit(node.name);
-                emitSignatureAndBody(node);
-            }
-            function shouldEmitAsArrowFunction(node) {
-                return node.kind === 180 && languageVersion >= 2;
-            }
-            function emitDeclarationName(node) {
-                if (node.name) {
-                    emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                }
-                else {
-                    write(getGeneratedNameForNode(node));
-                }
-            }
-            function shouldEmitFunctionName(node) {
-                if (node.kind === 179) {
-                    return !!node.name;
-                }
-                if (node.kind === 220) {
-                    return !!node.name || modulekind !== ts.ModuleKind.ES6;
-                }
-            }
-            function emitFunctionDeclaration(node) {
-                if (ts.nodeIsMissing(node.body)) {
-                    return emitCommentsOnNotEmittedNode(node);
-                }
-                var kind = node.kind, parent = node.parent;
-                if (kind !== 147 &&
-                    kind !== 146 &&
-                    parent &&
-                    parent.kind !== 253 &&
-                    parent.kind !== 174 &&
-                    parent.kind !== 170) {
-                    emitLeadingComments(node);
-                }
-                emitStart(node);
-                if (!shouldEmitAsArrowFunction(node)) {
-                    if (isES6ExportedDeclaration(node)) {
-                        write("export ");
-                        if (node.flags & 512) {
-                            write("default ");
-                        }
-                    }
-                    write("function");
-                    if (languageVersion >= 2 && node.asteriskToken) {
-                        write("*");
-                    }
-                    write(" ");
-                }
-                if (shouldEmitFunctionName(node)) {
-                    emitDeclarationName(node);
-                }
-                emitSignatureAndBody(node);
-                if (modulekind !== ts.ModuleKind.ES6 && kind === 220 && parent === currentSourceFile && node.name) {
-                    emitExportMemberAssignments(node.name);
-                }
-                emitEnd(node);
-                if (kind !== 147 &&
-                    kind !== 146 &&
-                    kind !== 180) {
-                    emitTrailingComments(node);
-                }
-            }
-            function emitCaptureThisForNodeIfNecessary(node) {
-                if (resolver.getNodeCheckFlags(node) & 4) {
-                    writeLine();
-                    emitStart(node);
-                    write("var _this = this;");
-                    emitEnd(node);
-                }
-            }
-            function emitSignatureParameters(node) {
-                increaseIndent();
-                write("(");
-                if (node) {
-                    var parameters = node.parameters;
-                    var skipCount = node.parameters.length && node.parameters[0].name.text === "this" ? 1 : 0;
-                    var omitCount = languageVersion < 2 && ts.hasDeclaredRestParameter(node) ? 1 : 0;
-                    emitList(parameters, skipCount, parameters.length - omitCount - skipCount, false, false);
-                }
-                write(")");
-                decreaseIndent();
-            }
-            function emitSignatureParametersForArrow(node) {
-                if (node.parameters.length === 1 && node.pos === node.parameters[0].pos) {
-                    emit(node.parameters[0]);
-                    return;
-                }
-                emitSignatureParameters(node);
-            }
-            function emitAsyncFunctionBodyForES6(node) {
-                var promiseConstructor = ts.getEntityNameFromTypeNode(node.type);
-                var isArrowFunction = node.kind === 180;
-                var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192) !== 0;
-                if (!isArrowFunction) {
-                    write(" {");
-                    increaseIndent();
-                    writeLine();
-                    if (resolver.getNodeCheckFlags(node) & 4096) {
-                        writeLines("\nconst _super = (function (geti, seti) {\n    const cache = Object.create(null);\n    return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);");
-                        writeLine();
-                    }
-                    else if (resolver.getNodeCheckFlags(node) & 2048) {
-                        write("const _super = name => super[name];");
-                        writeLine();
-                    }
-                    write("return");
-                }
-                write(" __awaiter(this");
-                if (hasLexicalArguments) {
-                    write(", arguments, ");
-                }
-                else {
-                    write(", void 0, ");
-                }
-                if (languageVersion >= 2 || !promiseConstructor) {
-                    write("void 0");
-                }
-                else {
-                    emitEntityNameAsExpression(promiseConstructor, false);
-                }
-                write(", function* ()");
-                emitFunctionBody(node);
-                write(")");
-                if (!isArrowFunction) {
-                    write(";");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function emitFunctionBody(node) {
-                if (!node.body) {
-                    write(" { }");
-                }
-                else {
-                    if (node.body.kind === 199) {
-                        emitBlockFunctionBody(node, node.body);
-                    }
-                    else {
-                        emitExpressionFunctionBody(node, node.body);
-                    }
-                }
-            }
-            function emitSignatureAndBody(node) {
-                var saveConvertedLoopState = convertedLoopState;
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                if (shouldEmitAsArrowFunction(node)) {
-                    emitSignatureParametersForArrow(node);
-                    write(" =>");
-                }
-                else {
-                    emitSignatureParameters(node);
-                }
-                var isAsync = ts.isAsyncFunctionLike(node);
-                if (isAsync) {
-                    emitAsyncFunctionBodyForES6(node);
-                }
-                else {
-                    emitFunctionBody(node);
-                }
-                if (!isES6ExportedDeclaration(node)) {
-                    emitExportMemberAssignment(node);
-                }
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-            }
-            function emitFunctionBodyPreamble(node) {
-                emitCaptureThisForNodeIfNecessary(node);
-                emitDefaultValueAssignments(node);
-                emitRestParameter(node);
-            }
-            function emitExpressionFunctionBody(node, body) {
-                if (languageVersion < 2 || node.flags & 256) {
-                    emitDownLevelExpressionFunctionBody(node, body);
-                    return;
-                }
-                write(" ");
-                var current = body;
-                while (current.kind === 177) {
-                    current = current.expression;
-                }
-                emitParenthesizedIf(body, current.kind === 171);
-            }
-            function emitDownLevelExpressionFunctionBody(node, body) {
-                write(" {");
-                increaseIndent();
-                var outPos = writer.getTextPos();
-                emitDetachedCommentsAndUpdateCommentsInfo(node.body);
-                emitFunctionBodyPreamble(node);
-                var preambleEmitted = writer.getTextPos() !== outPos;
-                decreaseIndent();
-                if (!preambleEmitted && nodeStartPositionsAreOnSameLine(node, body)) {
-                    write(" ");
-                    emitStart(body);
-                    write("return ");
-                    emit(body);
-                    emitEnd(body);
-                    write(";");
-                    emitTempDeclarations(false);
-                    write(" ");
-                }
-                else {
-                    increaseIndent();
-                    writeLine();
-                    emitLeadingComments(node.body);
-                    emitStart(body);
-                    write("return ");
-                    emit(body);
-                    emitEnd(body);
-                    write(";");
-                    emitTrailingComments(node.body);
-                    emitTempDeclarations(true);
-                    decreaseIndent();
-                    writeLine();
-                }
-                emitStart(node.body);
-                write("}");
-                emitEnd(node.body);
-            }
-            function emitBlockFunctionBody(node, body) {
-                write(" {");
-                var initialTextPos = writer.getTextPos();
-                increaseIndent();
-                emitDetachedCommentsAndUpdateCommentsInfo(body.statements);
-                var startIndex = emitDirectivePrologues(body.statements, true);
-                emitFunctionBodyPreamble(node);
-                decreaseIndent();
-                var preambleEmitted = writer.getTextPos() !== initialTextPos;
-                if (!preambleEmitted && nodeEndIsOnSameLineAsNodeStart(body, body)) {
-                    for (var _a = 0, _b = body.statements; _a < _b.length; _a++) {
-                        var statement = _b[_a];
-                        write(" ");
-                        emit(statement);
-                    }
-                    emitTempDeclarations(false);
-                    write(" ");
-                    emitLeadingCommentsOfPosition(body.statements.end);
-                }
-                else {
-                    increaseIndent();
-                    emitLinesStartingAt(body.statements, startIndex);
-                    emitTempDeclarations(true);
-                    writeLine();
-                    emitLeadingCommentsOfPosition(body.statements.end);
-                    decreaseIndent();
-                }
-                emitToken(16, body.statements.end);
-            }
-            function getSuperCallAtGivenIndex(ctor, index) {
-                if (!ctor.body) {
-                    return undefined;
-                }
-                var statements = ctor.body.statements;
-                if (!statements || index >= statements.length) {
-                    return undefined;
-                }
-                var statement = statements[index];
-                if (statement.kind === 202) {
-                    return ts.isSuperCallExpression(statement.expression) ? statement : undefined;
-                }
-            }
-            function emitParameterPropertyAssignments(node) {
-                ts.forEach(node.parameters, function (param) {
-                    if (param.flags & 92) {
-                        writeLine();
-                        emitStart(param);
-                        emitStart(param.name);
-                        write("this.");
-                        emitNodeWithoutSourceMap(param.name);
-                        emitEnd(param.name);
-                        write(" = ");
-                        emit(param.name);
-                        write(";");
-                        emitEnd(param);
-                    }
-                });
-            }
-            function emitMemberAccessForPropertyName(memberName) {
-                if (memberName.kind === 9 || memberName.kind === 8) {
-                    write("[");
-                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
-                    write("]");
-                }
-                else if (memberName.kind === 140) {
-                    emitComputedPropertyName(memberName);
-                }
-                else {
-                    write(".");
-                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
-                }
-            }
-            function getInitializedProperties(node, isStatic) {
-                var properties = [];
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    if (member.kind === 145 && isStatic === ((member.flags & 32) !== 0) && member.initializer) {
-                        properties.push(member);
-                    }
-                }
-                return properties;
-            }
-            function emitPropertyDeclarations(node, properties) {
-                for (var _a = 0, properties_6 = properties; _a < properties_6.length; _a++) {
-                    var property = properties_6[_a];
-                    emitPropertyDeclaration(node, property);
-                }
-            }
-            function emitPropertyDeclaration(node, property, receiver, isExpression) {
-                writeLine();
-                emitLeadingComments(property);
-                emitStart(property);
-                emitStart(property.name);
-                if (receiver) {
-                    emit(receiver);
-                }
-                else {
-                    if (property.flags & 32) {
-                        emitDeclarationName(node);
-                    }
-                    else {
-                        write("this");
-                    }
-                }
-                emitMemberAccessForPropertyName(property.name);
-                emitEnd(property.name);
-                write(" = ");
-                emit(property.initializer);
-                if (!isExpression) {
-                    write(";");
-                }
-                emitEnd(property);
-                emitTrailingComments(property);
-            }
-            function emitMemberFunctionsForES5AndLower(node) {
-                ts.forEach(node.members, function (member) {
-                    if (member.kind === 198) {
-                        writeLine();
-                        write(";");
-                    }
-                    else if (member.kind === 147 || node.kind === 146) {
-                        if (!member.body) {
-                            return emitCommentsOnNotEmittedNode(member);
-                        }
-                        writeLine();
-                        emitLeadingComments(member);
-                        emitStart(member);
-                        emitStart(member.name);
-                        emitClassMemberPrefix(node, member);
-                        emitMemberAccessForPropertyName(member.name);
-                        emitEnd(member.name);
-                        write(" = ");
-                        emitFunctionDeclaration(member);
-                        emitEnd(member);
-                        write(";");
-                        emitTrailingComments(member);
-                    }
-                    else if (member.kind === 149 || member.kind === 150) {
-                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
-                        if (member === accessors.firstAccessor) {
-                            writeLine();
-                            emitStart(member);
-                            write("Object.defineProperty(");
-                            emitStart(member.name);
-                            emitClassMemberPrefix(node, member);
-                            write(", ");
-                            emitExpressionForPropertyName(member.name);
-                            emitEnd(member.name);
-                            write(", {");
-                            increaseIndent();
-                            if (accessors.getAccessor) {
-                                writeLine();
-                                emitLeadingComments(accessors.getAccessor);
-                                write("get: ");
-                                emitStart(accessors.getAccessor);
-                                write("function ");
-                                emitSignatureAndBody(accessors.getAccessor);
-                                emitEnd(accessors.getAccessor);
-                                emitTrailingComments(accessors.getAccessor);
-                                write(",");
-                            }
-                            if (accessors.setAccessor) {
-                                writeLine();
-                                emitLeadingComments(accessors.setAccessor);
-                                write("set: ");
-                                emitStart(accessors.setAccessor);
-                                write("function ");
-                                emitSignatureAndBody(accessors.setAccessor);
-                                emitEnd(accessors.setAccessor);
-                                emitTrailingComments(accessors.setAccessor);
-                                write(",");
-                            }
-                            writeLine();
-                            write("enumerable: true,");
-                            writeLine();
-                            write("configurable: true");
-                            decreaseIndent();
-                            writeLine();
-                            write("});");
-                            emitEnd(member);
-                        }
-                    }
-                });
-            }
-            function emitMemberFunctionsForES6AndHigher(node) {
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    if ((member.kind === 147 || node.kind === 146) && !member.body) {
-                        emitCommentsOnNotEmittedNode(member);
-                    }
-                    else if (member.kind === 147 ||
-                        member.kind === 149 ||
-                        member.kind === 150) {
-                        writeLine();
-                        emitLeadingComments(member);
-                        emitStart(member);
-                        if (member.flags & 32) {
-                            write("static ");
-                        }
-                        if (member.kind === 149) {
-                            write("get ");
-                        }
-                        else if (member.kind === 150) {
-                            write("set ");
-                        }
-                        if (member.asteriskToken) {
-                            write("*");
-                        }
-                        emit(member.name);
-                        emitSignatureAndBody(member);
-                        emitEnd(member);
-                        emitTrailingComments(member);
-                    }
-                    else if (member.kind === 198) {
-                        writeLine();
-                        write(";");
-                    }
-                }
-            }
-            function emitConstructor(node, baseTypeElement) {
-                var saveConvertedLoopState = convertedLoopState;
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                emitConstructorWorker(node, baseTypeElement);
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-            }
-            function emitConstructorWorker(node, baseTypeElement) {
-                var hasInstancePropertyWithInitializer = false;
-                ts.forEach(node.members, function (member) {
-                    if (member.kind === 148 && !member.body) {
-                        emitCommentsOnNotEmittedNode(member);
-                    }
-                    if (member.kind === 145 && member.initializer && (member.flags & 32) === 0) {
-                        hasInstancePropertyWithInitializer = true;
-                    }
-                });
-                var ctor = ts.getFirstConstructorWithBody(node);
-                if (languageVersion >= 2 && !ctor && !hasInstancePropertyWithInitializer) {
-                    return;
-                }
-                if (ctor) {
-                    emitLeadingComments(ctor);
-                }
-                emitStart(ctor || node);
-                if (languageVersion < 2) {
-                    write("function ");
-                    emitDeclarationName(node);
-                    emitSignatureParameters(ctor);
-                }
-                else {
-                    write("constructor");
-                    if (ctor) {
-                        emitSignatureParameters(ctor);
-                    }
-                    else {
-                        if (baseTypeElement) {
-                            write("(...args)");
-                        }
-                        else {
-                            write("()");
-                        }
-                    }
-                }
-                var startIndex = 0;
-                write(" {");
-                increaseIndent();
-                if (ctor) {
-                    startIndex = emitDirectivePrologues(ctor.body.statements, true);
-                    emitDetachedCommentsAndUpdateCommentsInfo(ctor.body.statements);
-                }
-                emitCaptureThisForNodeIfNecessary(node);
-                var superCall;
-                if (ctor) {
-                    emitDefaultValueAssignments(ctor);
-                    emitRestParameter(ctor);
-                    if (baseTypeElement) {
-                        superCall = getSuperCallAtGivenIndex(ctor, startIndex);
-                        if (superCall) {
-                            writeLine();
-                            emit(superCall);
-                        }
-                    }
-                    emitParameterPropertyAssignments(ctor);
-                }
-                else {
-                    if (baseTypeElement) {
-                        writeLine();
-                        emitStart(baseTypeElement);
-                        if (languageVersion < 2) {
-                            write("_super.apply(this, arguments);");
-                        }
-                        else {
-                            write("super(...args);");
-                        }
-                        emitEnd(baseTypeElement);
-                    }
-                }
-                emitPropertyDeclarations(node, getInitializedProperties(node, false));
-                if (ctor) {
-                    var statements = ctor.body.statements;
-                    if (superCall) {
-                        statements = statements.slice(1);
-                    }
-                    emitLinesStartingAt(statements, startIndex);
-                }
-                emitTempDeclarations(true);
-                writeLine();
-                if (ctor) {
-                    emitLeadingCommentsOfPosition(ctor.body.statements.end);
-                }
-                decreaseIndent();
-                emitToken(16, ctor ? ctor.body.statements.end : node.members.end);
-                emitEnd(ctor || node);
-                if (ctor) {
-                    emitTrailingComments(ctor);
-                }
-            }
-            function emitClassExpression(node) {
-                return emitClassLikeDeclaration(node);
-            }
-            function emitClassDeclaration(node) {
-                return emitClassLikeDeclaration(node);
-            }
-            function emitClassLikeDeclaration(node) {
-                if (languageVersion < 2) {
-                    emitClassLikeDeclarationBelowES6(node);
-                }
-                else {
-                    emitClassLikeDeclarationForES6AndHigher(node);
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile && node.name) {
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            function emitClassLikeDeclarationForES6AndHigher(node) {
-                var decoratedClassAlias;
-                var isHoistedDeclarationInSystemModule = shouldHoistDeclarationInSystemJsModule(node);
-                var isDecorated = ts.nodeIsDecorated(node);
-                var rewriteAsClassExpression = isDecorated || isHoistedDeclarationInSystemModule;
-                if (node.kind === 221) {
-                    if (rewriteAsClassExpression) {
-                        if (isDecorated && resolver.getNodeCheckFlags(node) & 524288) {
-                            decoratedClassAlias = ts.unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default"));
-                            decoratedClassAliases[ts.getNodeId(node)] = decoratedClassAlias;
-                            write("let " + decoratedClassAlias + ";");
-                            writeLine();
-                        }
-                        if (isES6ExportedDeclaration(node) && !(node.flags & 512)) {
-                            write("export ");
-                        }
-                        if (!isHoistedDeclarationInSystemModule) {
-                            write("let ");
-                        }
-                        emitDeclarationName(node);
-                        if (decoratedClassAlias !== undefined) {
-                            write(" = " + decoratedClassAlias);
-                        }
-                        write(" = ");
-                    }
-                    else if (isES6ExportedDeclaration(node)) {
-                        write("export ");
-                        if (node.flags & 512) {
-                            write("default ");
-                        }
-                    }
-                }
-                var staticProperties = getInitializedProperties(node, true);
-                var isClassExpressionWithStaticProperties = staticProperties.length > 0 && node.kind === 192;
-                var tempVariable;
-                if (isClassExpressionWithStaticProperties) {
-                    tempVariable = createAndRecordTempVariable(0);
-                    write("(");
-                    increaseIndent();
-                    emit(tempVariable);
-                    write(" = ");
-                }
-                write("class");
-                if (node.name || (node.flags & 512 && (staticProperties.length > 0 || modulekind !== ts.ModuleKind.ES6) && !rewriteAsClassExpression)) {
-                    write(" ");
-                    emitDeclarationName(node);
-                }
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-                if (baseTypeNode) {
-                    write(" extends ");
-                    emit(baseTypeNode.expression);
-                }
-                write(" {");
-                increaseIndent();
-                writeLine();
-                emitConstructor(node, baseTypeNode);
-                emitMemberFunctionsForES6AndHigher(node);
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.members.end);
-                if (rewriteAsClassExpression) {
-                    decoratedClassAliases[ts.getNodeId(node)] = undefined;
-                    write(";");
-                }
-                if (isClassExpressionWithStaticProperties) {
-                    for (var _a = 0, staticProperties_1 = staticProperties; _a < staticProperties_1.length; _a++) {
-                        var property = staticProperties_1[_a];
-                        write(",");
-                        writeLine();
-                        emitPropertyDeclaration(node, property, tempVariable, true);
-                    }
-                    write(",");
-                    writeLine();
-                    emit(tempVariable);
-                    decreaseIndent();
-                    write(")");
-                }
-                else {
-                    writeLine();
-                    emitPropertyDeclarations(node, staticProperties);
-                    emitDecoratorsOfClass(node, decoratedClassAlias);
-                }
-                if (!(node.flags & 1)) {
-                    return;
-                }
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    emitExportMemberAssignment(node);
-                }
-                else {
-                    if (node.flags & 512) {
-                        if (isDecorated) {
-                            writeLine();
-                            write("export default ");
-                            emitDeclarationName(node);
-                            write(";");
-                        }
-                    }
-                    else if (node.parent.kind !== 256) {
-                        writeLine();
-                        emitStart(node);
-                        emitModuleMemberName(node);
-                        write(" = ");
-                        emitDeclarationName(node);
-                        emitEnd(node);
-                        write(";");
-                    }
-                }
-            }
-            function emitClassLikeDeclarationBelowES6(node) {
-                if (node.kind === 221) {
-                    if (!shouldHoistDeclarationInSystemJsModule(node)) {
-                        write("var ");
-                    }
-                    emitDeclarationName(node);
-                    write(" = ");
-                }
-                write("(function (");
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-                if (baseTypeNode) {
-                    write("_super");
-                }
-                write(") {");
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                var saveComputedPropertyNamesToGeneratedNames = computedPropertyNamesToGeneratedNames;
-                var saveConvertedLoopState = convertedLoopState;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                computedPropertyNamesToGeneratedNames = undefined;
-                increaseIndent();
-                if (baseTypeNode) {
-                    writeLine();
-                    emitStart(baseTypeNode);
-                    write("__extends(");
-                    emitDeclarationName(node);
-                    write(", _super);");
-                    emitEnd(baseTypeNode);
-                }
-                writeLine();
-                emitConstructor(node, baseTypeNode);
-                emitMemberFunctionsForES5AndLower(node);
-                emitPropertyDeclarations(node, getInitializedProperties(node, true));
-                writeLine();
-                emitDecoratorsOfClass(node, undefined);
-                writeLine();
-                emitToken(16, node.members.end, function () {
-                    write("return ");
-                    emitDeclarationName(node);
-                });
-                write(";");
-                emitTempDeclarations(true);
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-                computedPropertyNamesToGeneratedNames = saveComputedPropertyNamesToGeneratedNames;
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.members.end);
-                emitStart(node);
-                write("(");
-                if (baseTypeNode) {
-                    emit(baseTypeNode.expression);
-                }
-                write("))");
-                if (node.kind === 221) {
-                    write(";");
-                }
-                emitEnd(node);
-                if (node.kind === 221) {
-                    emitExportMemberAssignment(node);
-                }
-            }
-            function emitClassMemberPrefix(node, member) {
-                emitDeclarationName(node);
-                if (!(member.flags & 32)) {
-                    write(".prototype");
-                }
-            }
-            function emitDecoratorsOfClass(node, decoratedClassAlias) {
-                emitDecoratorsOfMembers(node, 0);
-                emitDecoratorsOfMembers(node, 32);
-                emitDecoratorsOfConstructor(node, decoratedClassAlias);
-            }
-            function emitDecoratorsOfConstructor(node, decoratedClassAlias) {
-                var decorators = node.decorators;
-                var constructor = ts.getFirstConstructorWithBody(node);
-                var firstParameterDecorator = constructor && ts.forEach(constructor.parameters, function (parameter) { return parameter.decorators; });
-                if (!decorators && !firstParameterDecorator) {
-                    return;
-                }
-                writeLine();
-                emitStart(node.decorators || firstParameterDecorator);
-                emitDeclarationName(node);
-                if (decoratedClassAlias !== undefined) {
-                    write(" = " + decoratedClassAlias);
-                }
-                write(" = __decorate([");
-                increaseIndent();
-                writeLine();
-                var decoratorCount = decorators ? decorators.length : 0;
-                var argumentsWritten = emitList(decorators, 0, decoratorCount, true, false, false, true, function (decorator) { return emit(decorator.expression); });
-                if (firstParameterDecorator) {
-                    argumentsWritten += emitDecoratorsOfParameters(constructor, argumentsWritten > 0);
-                }
-                emitSerializedTypeMetadata(node, argumentsWritten >= 0);
-                decreaseIndent();
-                writeLine();
-                write("], ");
-                emitDeclarationName(node);
-                write(")");
-                emitEnd(node.decorators || firstParameterDecorator);
-                write(";");
-                writeLine();
-            }
-            function emitDecoratorsOfMembers(node, staticFlag) {
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    if ((member.flags & 32) !== staticFlag) {
-                        continue;
-                    }
-                    if (!ts.nodeCanBeDecorated(member)) {
-                        continue;
-                    }
-                    var decorators = void 0;
-                    var functionLikeMember = void 0;
-                    if (ts.isAccessor(member)) {
-                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
-                        if (member !== accessors.firstAccessor) {
-                            continue;
-                        }
-                        decorators = accessors.firstAccessor.decorators;
-                        if (!decorators && accessors.secondAccessor) {
-                            decorators = accessors.secondAccessor.decorators;
-                        }
-                        functionLikeMember = accessors.setAccessor;
-                    }
-                    else {
-                        decorators = member.decorators;
-                        if (member.kind === 147) {
-                            functionLikeMember = member;
-                        }
-                    }
-                    var firstParameterDecorator = functionLikeMember && ts.forEach(functionLikeMember.parameters, function (parameter) { return parameter.decorators; });
-                    if (!decorators && !firstParameterDecorator) {
-                        continue;
-                    }
-                    writeLine();
-                    emitStart(decorators || firstParameterDecorator);
-                    write("__decorate([");
-                    increaseIndent();
-                    writeLine();
-                    var decoratorCount = decorators ? decorators.length : 0;
-                    var argumentsWritten = emitList(decorators, 0, decoratorCount, true, false, false, true, function (decorator) { return emit(decorator.expression); });
-                    if (firstParameterDecorator) {
-                        argumentsWritten += emitDecoratorsOfParameters(functionLikeMember, argumentsWritten > 0);
-                    }
-                    emitSerializedTypeMetadata(member, argumentsWritten > 0);
-                    decreaseIndent();
-                    writeLine();
-                    write("], ");
-                    emitClassMemberPrefix(node, member);
-                    write(", ");
-                    emitExpressionForPropertyName(member.name);
-                    if (languageVersion > 0) {
-                        if (member.kind !== 145) {
-                            write(", null");
-                        }
-                        else {
-                            write(", void 0");
-                        }
-                    }
-                    write(")");
-                    emitEnd(decorators || firstParameterDecorator);
-                    write(";");
-                    writeLine();
-                }
-            }
-            function emitDecoratorsOfParameters(node, leadingComma) {
-                var argumentsWritten = 0;
-                if (node) {
-                    var parameterIndex_1 = 0;
-                    for (var _a = 0, _b = node.parameters; _a < _b.length; _a++) {
-                        var parameter = _b[_a];
-                        if (ts.nodeIsDecorated(parameter)) {
-                            var decorators = parameter.decorators;
-                            argumentsWritten += emitList(decorators, 0, decorators.length, true, false, leadingComma, true, function (decorator) {
-                                write("__param(" + parameterIndex_1 + ", ");
-                                emit(decorator.expression);
-                                write(")");
-                            });
-                            leadingComma = true;
-                        }
-                        parameterIndex_1++;
-                    }
-                }
-                return argumentsWritten;
-            }
-            function shouldEmitTypeMetadata(node) {
-                switch (node.kind) {
-                    case 147:
-                    case 149:
-                    case 150:
-                    case 145:
-                        return true;
-                }
-                return false;
-            }
-            function shouldEmitReturnTypeMetadata(node) {
-                switch (node.kind) {
-                    case 147:
-                        return true;
-                }
-                return false;
-            }
-            function shouldEmitParamTypesMetadata(node) {
-                switch (node.kind) {
-                    case 221:
-                    case 147:
-                    case 150:
-                        return true;
-                }
-                return false;
-            }
-            function emitSerializedTypeOfNode(node) {
-                switch (node.kind) {
-                    case 221:
-                        write("Function");
-                        return;
-                    case 145:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 142:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 149:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 150:
-                        emitSerializedTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
-                        return;
-                }
-                if (ts.isFunctionLike(node)) {
-                    write("Function");
-                    return;
-                }
-                write("void 0");
-            }
-            function emitSerializedTypeNode(node) {
-                if (node) {
-                    switch (node.kind) {
-                        case 103:
-                            write("void 0");
-                            return;
-                        case 164:
-                            emitSerializedTypeNode(node.type);
-                            return;
-                        case 156:
-                        case 157:
-                            write("Function");
-                            return;
-                        case 160:
-                        case 161:
-                            write("Array");
-                            return;
-                        case 154:
-                        case 120:
-                            write("Boolean");
-                            return;
-                        case 132:
-                        case 166:
-                            write("String");
-                            return;
-                        case 130:
-                            write("Number");
-                            return;
-                        case 133:
-                            write("Symbol");
-                            return;
-                        case 155:
-                            emitSerializedTypeReferenceNode(node);
-                            return;
-                        case 158:
-                        case 159:
-                        case 162:
-                        case 163:
-                        case 117:
-                        case 165:
-                            break;
-                        default:
-                            ts.Debug.fail("Cannot serialize unexpected type node.");
-                            break;
-                    }
-                }
-                write("Object");
-            }
-            function emitSerializedTypeReferenceNode(node) {
-                var location = node.parent;
-                while (ts.isDeclaration(location) || ts.isTypeNode(location)) {
-                    location = location.parent;
-                }
-                var typeName = ts.cloneEntityName(node.typeName, location);
-                var result = resolver.getTypeReferenceSerializationKind(typeName);
-                switch (result) {
-                    case ts.TypeReferenceSerializationKind.Unknown:
-                        var temp = createAndRecordTempVariable(0);
-                        write("(typeof (");
-                        emitNodeWithoutSourceMap(temp);
-                        write(" = ");
-                        emitEntityNameAsExpression(typeName, true);
-                        write(") === 'function' && ");
-                        emitNodeWithoutSourceMap(temp);
-                        write(") || Object");
-                        break;
-                    case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
-                        emitEntityNameAsExpression(typeName, false);
-                        break;
-                    case ts.TypeReferenceSerializationKind.VoidType:
-                        write("void 0");
-                        break;
-                    case ts.TypeReferenceSerializationKind.BooleanType:
-                        write("Boolean");
-                        break;
-                    case ts.TypeReferenceSerializationKind.NumberLikeType:
-                        write("Number");
-                        break;
-                    case ts.TypeReferenceSerializationKind.StringLikeType:
-                        write("String");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ArrayLikeType:
-                        write("Array");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ESSymbolType:
-                        if (languageVersion < 2) {
-                            write("typeof Symbol === 'function' ? Symbol : Object");
-                        }
-                        else {
-                            write("Symbol");
-                        }
-                        break;
-                    case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
-                        write("Function");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ObjectType:
-                        write("Object");
-                        break;
-                }
-            }
-            function emitSerializedParameterTypesOfNode(node) {
-                if (node) {
-                    var valueDeclaration = void 0;
-                    if (node.kind === 221) {
-                        valueDeclaration = ts.getFirstConstructorWithBody(node);
-                    }
-                    else if (ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)) {
-                        valueDeclaration = node;
-                    }
-                    if (valueDeclaration) {
-                        var parameters = valueDeclaration.parameters;
-                        var parameterCount = parameters.length;
-                        if (parameterCount > 0) {
-                            for (var i = 0; i < parameterCount; i++) {
-                                if (i > 0) {
-                                    write(", ");
-                                }
-                                if (parameters[i].dotDotDotToken) {
-                                    var parameterType = parameters[i].type;
-                                    if (parameterType.kind === 160) {
-                                        parameterType = parameterType.elementType;
-                                    }
-                                    else if (parameterType.kind === 155 && parameterType.typeArguments && parameterType.typeArguments.length === 1) {
-                                        parameterType = parameterType.typeArguments[0];
-                                    }
-                                    else {
-                                        parameterType = undefined;
-                                    }
-                                    emitSerializedTypeNode(parameterType);
-                                }
-                                else {
-                                    emitSerializedTypeOfNode(parameters[i]);
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            function emitSerializedReturnTypeOfNode(node) {
-                if (node && ts.isFunctionLike(node) && node.type) {
-                    emitSerializedTypeNode(node.type);
-                    return;
-                }
-                write("void 0");
-            }
-            function emitSerializedTypeMetadata(node, writeComma) {
-                var argumentsWritten = 0;
-                if (compilerOptions.emitDecoratorMetadata) {
-                    if (shouldEmitTypeMetadata(node)) {
-                        if (writeComma) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:type', ");
-                        emitSerializedTypeOfNode(node);
-                        write(")");
-                        argumentsWritten++;
-                    }
-                    if (shouldEmitParamTypesMetadata(node)) {
-                        if (writeComma || argumentsWritten) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:paramtypes', [");
-                        emitSerializedParameterTypesOfNode(node);
-                        write("])");
-                        argumentsWritten++;
-                    }
-                    if (shouldEmitReturnTypeMetadata(node)) {
-                        if (writeComma || argumentsWritten) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:returntype', ");
-                        emitSerializedReturnTypeOfNode(node);
-                        write(")");
-                        argumentsWritten++;
-                    }
-                }
-                return argumentsWritten;
-            }
-            function emitInterfaceDeclaration(node) {
-                emitCommentsOnNotEmittedNode(node);
-            }
-            function shouldEmitEnumDeclaration(node) {
-                var isConstEnum = ts.isConst(node);
-                return !isConstEnum || compilerOptions.preserveConstEnums || compilerOptions.isolatedModules;
-            }
-            function emitEnumDeclaration(node) {
-                if (!shouldEmitEnumDeclaration(node)) {
-                    return;
-                }
-                if (!shouldHoistDeclarationInSystemJsModule(node)) {
-                    var isES6ExportedEnum = isES6ExportedDeclaration(node);
-                    if (!(node.flags & 1) || (isES6ExportedEnum && isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 224))) {
-                        emitStart(node);
-                        if (isES6ExportedEnum) {
-                            write("export ");
-                        }
-                        write("var ");
-                        emit(node.name);
-                        emitEnd(node);
-                        write(";");
-                    }
-                }
-                writeLine();
-                emitStart(node);
-                write("(function (");
-                emitStart(node.name);
-                write(getGeneratedNameForNode(node));
-                emitEnd(node.name);
-                write(") {");
-                increaseIndent();
-                emitLines(node.members);
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.members.end);
-                write(")(");
-                emitModuleMemberName(node);
-                write(" || (");
-                emitModuleMemberName(node);
-                write(" = {}));");
-                emitEnd(node);
-                if (!isES6ExportedDeclaration(node) && node.flags & 1 && !shouldHoistDeclarationInSystemJsModule(node)) {
-                    writeLine();
-                    emitStart(node);
-                    write("var ");
-                    emit(node.name);
-                    write(" = ");
-                    emitModuleMemberName(node);
-                    emitEnd(node);
-                    write(";");
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
-                    if (modulekind === ts.ModuleKind.System && (node.flags & 1)) {
-                        writeLine();
-                        write(exportFunctionForFile + "(\"");
-                        emitDeclarationName(node);
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(");");
-                    }
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            function emitEnumMember(node) {
-                var enumParent = node.parent;
-                emitStart(node);
-                write(getGeneratedNameForNode(enumParent));
-                write("[");
-                write(getGeneratedNameForNode(enumParent));
-                write("[");
-                emitExpressionForPropertyName(node.name);
-                write("] = ");
-                writeEnumMemberDeclarationValue(node);
-                write("] = ");
-                emitExpressionForPropertyName(node.name);
-                emitEnd(node);
-                write(";");
-            }
-            function writeEnumMemberDeclarationValue(member) {
-                var value = resolver.getConstantValue(member);
-                if (value !== undefined) {
-                    write(value.toString());
-                    return;
-                }
-                else if (member.initializer) {
-                    emit(member.initializer);
-                }
-                else {
-                    write("undefined");
-                }
-            }
-            function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
-                if (moduleDeclaration.body.kind === 225) {
-                    var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
-                    return recursiveInnerModule || moduleDeclaration.body;
-                }
-            }
-            function shouldEmitModuleDeclaration(node) {
-                return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules);
-            }
-            function isModuleMergedWithES6Class(node) {
-                return languageVersion === 2 && !!(resolver.getNodeCheckFlags(node) & 32768);
-            }
-            function isFirstDeclarationOfKind(node, declarations, kind) {
-                return !ts.forEach(declarations, function (declaration) { return declaration.kind === kind && declaration.pos < node.pos; });
-            }
-            function emitModuleDeclaration(node) {
-                var shouldEmit = shouldEmitModuleDeclaration(node);
-                if (!shouldEmit) {
-                    return emitCommentsOnNotEmittedNode(node);
-                }
-                var hoistedInDeclarationScope = shouldHoistDeclarationInSystemJsModule(node);
-                var emitVarForModule = !hoistedInDeclarationScope && !isModuleMergedWithES6Class(node);
-                if (emitVarForModule) {
-                    var isES6ExportedNamespace = isES6ExportedDeclaration(node);
-                    if (!isES6ExportedNamespace || isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 225)) {
-                        emitStart(node);
-                        if (isES6ExportedNamespace) {
-                            write("export ");
-                        }
-                        write("var ");
-                        emit(node.name);
-                        write(";");
-                        emitEnd(node);
-                        writeLine();
-                    }
-                }
-                emitStart(node);
-                write("(function (");
-                emitStart(node.name);
-                write(getGeneratedNameForNode(node));
-                emitEnd(node.name);
-                write(") ");
-                if (node.body.kind === 226) {
-                    var saveConvertedLoopState = convertedLoopState;
-                    var saveTempFlags = tempFlags;
-                    var saveTempVariables = tempVariables;
-                    convertedLoopState = undefined;
-                    tempFlags = 0;
-                    tempVariables = undefined;
-                    emit(node.body);
-                    ts.Debug.assert(convertedLoopState === undefined);
-                    convertedLoopState = saveConvertedLoopState;
-                    tempFlags = saveTempFlags;
-                    tempVariables = saveTempVariables;
-                }
-                else {
-                    write("{");
-                    increaseIndent();
-                    emitCaptureThisForNodeIfNecessary(node);
-                    writeLine();
-                    emit(node.body);
-                    decreaseIndent();
-                    writeLine();
-                    var moduleBlock = getInnerMostModuleDeclarationFromDottedModule(node).body;
-                    emitToken(16, moduleBlock.statements.end);
-                }
-                write(")(");
-                if ((node.flags & 1) && !isES6ExportedDeclaration(node)) {
-                    emit(node.name);
-                    write(" = ");
-                }
-                emitModuleMemberName(node);
-                write(" || (");
-                emitModuleMemberName(node);
-                write(" = {}));");
-                emitEnd(node);
-                if (!isES6ExportedDeclaration(node) && node.name.kind === 69 && node.parent === currentSourceFile) {
-                    if (modulekind === ts.ModuleKind.System && (node.flags & 1)) {
-                        writeLine();
-                        write(exportFunctionForFile + "(\"");
-                        emitDeclarationName(node);
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(");");
-                    }
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            function tryRenameExternalModule(moduleName) {
-                if (renamedDependencies && ts.hasProperty(renamedDependencies, moduleName.text)) {
-                    return "\"" + renamedDependencies[moduleName.text] + "\"";
-                }
-                return undefined;
-            }
-            function emitRequire(moduleName) {
-                if (moduleName.kind === 9) {
-                    write("require(");
-                    var text = tryRenameExternalModule(moduleName);
-                    if (text) {
-                        write(text);
-                    }
-                    else {
-                        emitStart(moduleName);
-                        emitLiteral(moduleName);
-                        emitEnd(moduleName);
-                    }
-                    emitToken(18, moduleName.end);
-                }
-                else {
-                    write("require()");
-                }
-            }
-            function getNamespaceDeclarationNode(node) {
-                if (node.kind === 229) {
-                    return node;
-                }
-                var importClause = node.importClause;
-                if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232) {
-                    return importClause.namedBindings;
-                }
-            }
-            function isDefaultImport(node) {
-                return node.kind === 230 && node.importClause && !!node.importClause.name;
-            }
-            function emitExportImportAssignments(node) {
-                if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
-                    emitExportMemberAssignments(node.name);
-                }
-                ts.forEachChild(node, emitExportImportAssignments);
-            }
-            function emitImportDeclaration(node) {
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    return emitExternalImportDeclaration(node);
-                }
-                if (node.importClause) {
-                    var shouldEmitDefaultBindings = resolver.isReferencedAliasDeclaration(node.importClause);
-                    var shouldEmitNamedBindings = node.importClause.namedBindings && resolver.isReferencedAliasDeclaration(node.importClause.namedBindings, true);
-                    if (shouldEmitDefaultBindings || shouldEmitNamedBindings) {
-                        write("import ");
-                        emitStart(node.importClause);
-                        if (shouldEmitDefaultBindings) {
-                            emit(node.importClause.name);
-                            if (shouldEmitNamedBindings) {
-                                write(", ");
-                            }
-                        }
-                        if (shouldEmitNamedBindings) {
-                            emitLeadingComments(node.importClause.namedBindings);
-                            emitStart(node.importClause.namedBindings);
-                            if (node.importClause.namedBindings.kind === 232) {
-                                write("* as ");
-                                emit(node.importClause.namedBindings.name);
-                            }
-                            else {
-                                write("{ ");
-                                emitExportOrImportSpecifierList(node.importClause.namedBindings.elements, resolver.isReferencedAliasDeclaration);
-                                write(" }");
-                            }
-                            emitEnd(node.importClause.namedBindings);
-                            emitTrailingComments(node.importClause.namedBindings);
-                        }
-                        emitEnd(node.importClause);
-                        write(" from ");
-                        emit(node.moduleSpecifier);
-                        write(";");
-                    }
-                }
-                else {
-                    write("import ");
-                    emit(node.moduleSpecifier);
-                    write(";");
-                }
-            }
-            function emitExternalImportDeclaration(node) {
-                if (ts.contains(externalImports, node)) {
-                    var isExportedImport = node.kind === 229 && (node.flags & 1) !== 0;
-                    var namespaceDeclaration = getNamespaceDeclarationNode(node);
-                    var varOrConst = (languageVersion <= 1) ? "var " : "const ";
-                    if (modulekind !== ts.ModuleKind.AMD) {
-                        emitLeadingComments(node);
-                        emitStart(node);
-                        if (namespaceDeclaration && !isDefaultImport(node)) {
-                            if (!isExportedImport) {
-                                write(varOrConst);
-                            }
-                            ;
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                        }
-                        else {
-                            var isNakedImport = 230 && !node.importClause;
-                            if (!isNakedImport) {
-                                write(varOrConst);
-                                write(getGeneratedNameForNode(node));
-                                write(" = ");
-                            }
-                        }
-                        emitRequire(ts.getExternalModuleName(node));
-                        if (namespaceDeclaration && isDefaultImport(node)) {
-                            write(", ");
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            write(getGeneratedNameForNode(node));
-                        }
-                        write(";");
-                        emitEnd(node);
-                        emitExportImportAssignments(node);
-                        emitTrailingComments(node);
-                    }
-                    else {
-                        if (isExportedImport) {
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            emit(namespaceDeclaration.name);
-                            write(";");
-                        }
-                        else if (namespaceDeclaration && isDefaultImport(node)) {
-                            write(varOrConst);
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            write(getGeneratedNameForNode(node));
-                            write(";");
-                        }
-                        emitExportImportAssignments(node);
-                    }
-                }
-            }
-            function emitImportEqualsDeclaration(node) {
-                if (ts.isExternalModuleImportEqualsDeclaration(node)) {
-                    emitExternalImportDeclaration(node);
-                    return;
-                }
-                if (resolver.isReferencedAliasDeclaration(node) ||
-                    (!isCurrentFileExternalModule && resolver.isTopLevelValueImportEqualsWithEntityName(node))) {
-                    emitLeadingComments(node);
-                    emitStart(node);
-                    var variableDeclarationIsHoisted = shouldHoistVariable(node, true);
-                    var isExported = isSourceFileLevelDeclarationInSystemJsModule(node, true);
-                    if (!variableDeclarationIsHoisted) {
-                        ts.Debug.assert(!isExported);
-                        if (isES6ExportedDeclaration(node)) {
-                            write("export ");
-                            write("var ");
-                        }
-                        else if (!(node.flags & 1)) {
-                            write("var ");
-                        }
-                    }
-                    if (isExported) {
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithoutSourceMap(node.name);
-                        write("\", ");
-                    }
-                    emitModuleMemberName(node);
-                    write(" = ");
-                    emit(node.moduleReference);
-                    if (isExported) {
-                        write(")");
-                    }
-                    write(";");
-                    emitEnd(node);
-                    emitExportImportAssignments(node);
-                    emitTrailingComments(node);
-                }
-            }
-            function emitExportDeclaration(node) {
-                ts.Debug.assert(modulekind !== ts.ModuleKind.System);
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    if (node.moduleSpecifier && (!node.exportClause || resolver.isValueAliasDeclaration(node))) {
-                        emitStart(node);
-                        var generatedName = getGeneratedNameForNode(node);
-                        if (node.exportClause) {
-                            if (modulekind !== ts.ModuleKind.AMD) {
-                                write("var ");
-                                write(generatedName);
-                                write(" = ");
-                                emitRequire(ts.getExternalModuleName(node));
-                                write(";");
-                            }
-                            for (var _a = 0, _b = node.exportClause.elements; _a < _b.length; _a++) {
-                                var specifier = _b[_a];
-                                if (resolver.isValueAliasDeclaration(specifier)) {
-                                    writeLine();
-                                    emitStart(specifier);
-                                    emitContainingModuleName(specifier);
-                                    write(".");
-                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                                    write(" = ");
-                                    write(generatedName);
-                                    write(".");
-                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.propertyName || specifier.name);
-                                    write(";");
-                                    emitEnd(specifier);
-                                }
-                            }
-                        }
-                        else {
-                            if (hasExportStarsToExportValues && resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
-                                writeLine();
-                                write("__export(");
-                                if (modulekind !== ts.ModuleKind.AMD) {
-                                    emitRequire(ts.getExternalModuleName(node));
-                                }
-                                else {
-                                    write(generatedName);
-                                }
-                                write(");");
-                            }
-                        }
-                        emitEnd(node);
-                    }
-                }
-                else {
-                    if (!node.exportClause || resolver.isValueAliasDeclaration(node)) {
-                        write("export ");
-                        if (node.exportClause) {
-                            write("{ ");
-                            emitExportOrImportSpecifierList(node.exportClause.elements, resolver.isValueAliasDeclaration);
-                            write(" }");
-                        }
-                        else {
-                            write("*");
-                        }
-                        if (node.moduleSpecifier) {
-                            write(" from ");
-                            emit(node.moduleSpecifier);
-                        }
-                        write(";");
-                    }
-                }
-            }
-            function emitExportOrImportSpecifierList(specifiers, shouldEmit) {
-                ts.Debug.assert(modulekind === ts.ModuleKind.ES6);
-                var needsComma = false;
-                for (var _a = 0, specifiers_1 = specifiers; _a < specifiers_1.length; _a++) {
-                    var specifier = specifiers_1[_a];
-                    if (shouldEmit(specifier)) {
-                        if (needsComma) {
-                            write(", ");
-                        }
-                        if (specifier.propertyName) {
-                            emit(specifier.propertyName);
-                            write(" as ");
-                        }
-                        emit(specifier.name);
-                        needsComma = true;
-                    }
-                }
-            }
-            function emitExportAssignment(node) {
-                if (!node.isExportEquals && resolver.isValueAliasDeclaration(node)) {
-                    if (modulekind === ts.ModuleKind.ES6) {
-                        writeLine();
-                        emitStart(node);
-                        write("export default ");
-                        var expression = node.expression;
-                        emit(expression);
-                        if (expression.kind !== 220 &&
-                            expression.kind !== 221) {
-                            write(";");
-                        }
-                        emitEnd(node);
-                    }
-                    else {
-                        writeLine();
-                        emitStart(node);
-                        if (modulekind === ts.ModuleKind.System) {
-                            write(exportFunctionForFile + "(\"default\",");
-                            emit(node.expression);
-                            write(")");
-                        }
-                        else {
-                            emitEs6ExportDefaultCompat(node);
-                            emitContainingModuleName(node);
-                            if (languageVersion === 0) {
-                                write('["default"] = ');
-                            }
-                            else {
-                                write(".default = ");
-                            }
-                            emit(node.expression);
-                        }
-                        write(";");
-                        emitEnd(node);
-                    }
-                }
-            }
-            function collectExternalModuleInfo(sourceFile) {
-                externalImports = [];
-                exportSpecifiers = {};
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                for (var _a = 0, _b = sourceFile.statements; _a < _b.length; _a++) {
-                    var node = _b[_a];
-                    switch (node.kind) {
-                        case 230:
-                            if (!node.importClause ||
-                                resolver.isReferencedAliasDeclaration(node.importClause, true)) {
-                                externalImports.push(node);
-                            }
-                            break;
-                        case 229:
-                            if (node.moduleReference.kind === 240 && resolver.isReferencedAliasDeclaration(node)) {
-                                externalImports.push(node);
-                            }
-                            break;
-                        case 236:
-                            if (node.moduleSpecifier) {
-                                if (!node.exportClause) {
-                                    if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
-                                        externalImports.push(node);
-                                        hasExportStarsToExportValues = true;
-                                    }
-                                }
-                                else if (resolver.isValueAliasDeclaration(node)) {
-                                    externalImports.push(node);
-                                }
-                            }
-                            else {
-                                for (var _c = 0, _d = node.exportClause.elements; _c < _d.length; _c++) {
-                                    var specifier = _d[_c];
-                                    var name_29 = (specifier.propertyName || specifier.name).text;
-                                    (exportSpecifiers[name_29] || (exportSpecifiers[name_29] = [])).push(specifier);
-                                }
-                            }
-                            break;
-                        case 235:
-                            if (node.isExportEquals && !exportEquals) {
-                                exportEquals = node;
-                            }
-                            break;
-                    }
-                }
-            }
-            function emitExportStarHelper() {
-                if (hasExportStarsToExportValues) {
-                    writeLine();
-                    write("function __export(m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function getLocalNameForExternalImport(node) {
-                var namespaceDeclaration = getNamespaceDeclarationNode(node);
-                if (namespaceDeclaration && !isDefaultImport(node)) {
-                    return ts.getTextOfNodeFromSourceText(currentText, namespaceDeclaration.name);
-                }
-                if (node.kind === 230 && node.importClause) {
-                    return getGeneratedNameForNode(node);
-                }
-                if (node.kind === 236 && node.moduleSpecifier) {
-                    return getGeneratedNameForNode(node);
-                }
-            }
-            function getExternalModuleNameText(importNode, emitRelativePathAsModuleName) {
-                if (emitRelativePathAsModuleName) {
-                    var name_30 = getExternalModuleNameFromDeclaration(host, resolver, importNode);
-                    if (name_30) {
-                        return "\"" + name_30 + "\"";
-                    }
-                }
-                var moduleName = ts.getExternalModuleName(importNode);
-                if (moduleName.kind === 9) {
-                    return tryRenameExternalModule(moduleName) || getLiteralText(moduleName);
-                }
-                return undefined;
-            }
-            function emitVariableDeclarationsForImports() {
-                if (externalImports.length === 0) {
-                    return;
-                }
-                writeLine();
-                var started = false;
-                for (var _a = 0, externalImports_1 = externalImports; _a < externalImports_1.length; _a++) {
-                    var importNode = externalImports_1[_a];
-                    var skipNode = importNode.kind === 236 ||
-                        (importNode.kind === 230 && !importNode.importClause);
-                    if (skipNode) {
-                        continue;
-                    }
-                    if (!started) {
-                        write("var ");
-                        started = true;
-                    }
-                    else {
-                        write(", ");
-                    }
-                    write(getLocalNameForExternalImport(importNode));
-                }
-                if (started) {
-                    write(";");
-                }
-            }
-            function emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations) {
-                if (!hasExportStarsToExportValues) {
-                    return undefined;
-                }
-                if (!exportedDeclarations && ts.isEmpty(exportSpecifiers)) {
-                    var hasExportDeclarationWithExportClause = false;
-                    for (var _a = 0, externalImports_2 = externalImports; _a < externalImports_2.length; _a++) {
-                        var externalImport = externalImports_2[_a];
-                        if (externalImport.kind === 236 && externalImport.exportClause) {
-                            hasExportDeclarationWithExportClause = true;
-                            break;
-                        }
-                    }
-                    if (!hasExportDeclarationWithExportClause) {
-                        return emitExportStarFunction(undefined);
-                    }
-                }
-                var exportedNamesStorageRef = makeUniqueName("exportedNames");
-                writeLine();
-                write("var " + exportedNamesStorageRef + " = {");
-                increaseIndent();
-                var started = false;
-                if (exportedDeclarations) {
-                    for (var i = 0; i < exportedDeclarations.length; i++) {
-                        writeExportedName(exportedDeclarations[i]);
-                    }
-                }
-                if (exportSpecifiers) {
-                    for (var n in exportSpecifiers) {
-                        for (var _b = 0, _c = exportSpecifiers[n]; _b < _c.length; _b++) {
-                            var specifier = _c[_b];
-                            writeExportedName(specifier.name);
-                        }
-                    }
-                }
-                for (var _d = 0, externalImports_3 = externalImports; _d < externalImports_3.length; _d++) {
-                    var externalImport = externalImports_3[_d];
-                    if (externalImport.kind !== 236) {
-                        continue;
-                    }
-                    var exportDecl = externalImport;
-                    if (!exportDecl.exportClause) {
-                        continue;
-                    }
-                    for (var _e = 0, _f = exportDecl.exportClause.elements; _e < _f.length; _e++) {
-                        var element = _f[_e];
-                        writeExportedName(element.name || element.propertyName);
-                    }
-                }
-                decreaseIndent();
-                writeLine();
-                write("};");
-                return emitExportStarFunction(exportedNamesStorageRef);
-                function emitExportStarFunction(localNames) {
-                    var exportStarFunction = makeUniqueName("exportStar");
-                    writeLine();
-                    write("function " + exportStarFunction + "(m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("var exports = {};");
-                    writeLine();
-                    write("for(var n in m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("if (n !== \"default\"");
-                    if (localNames) {
-                        write("&& !" + localNames + ".hasOwnProperty(n)");
-                    }
-                    write(") exports[n] = m[n];");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                    writeLine();
-                    write(exportFunctionForFile + "(exports);");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                    return exportStarFunction;
-                }
-                function writeExportedName(node) {
-                    if (node.kind !== 69 && node.flags & 512) {
-                        return;
-                    }
-                    if (started) {
-                        write(",");
-                    }
-                    else {
-                        started = true;
-                    }
-                    writeLine();
-                    write("'");
-                    if (node.kind === 69) {
-                        emitNodeWithCommentsAndWithoutSourcemap(node);
-                    }
-                    else {
-                        emitDeclarationName(node);
-                    }
-                    write("': true");
-                }
-            }
-            function processTopLevelVariableAndFunctionDeclarations(node) {
-                var hoistedVars;
-                var hoistedFunctionDeclarations;
-                var exportedDeclarations;
-                visit(node);
-                if (hoistedVars) {
-                    writeLine();
-                    write("var ");
-                    var seen = {};
-                    for (var i = 0; i < hoistedVars.length; i++) {
-                        var local = hoistedVars[i];
-                        var name_31 = local.kind === 69
-                            ? local
-                            : local.name;
-                        if (name_31) {
-                            var text = ts.unescapeIdentifier(name_31.text);
-                            if (ts.hasProperty(seen, text)) {
-                                continue;
-                            }
-                            else {
-                                seen[text] = text;
-                            }
-                        }
-                        if (i !== 0) {
-                            write(", ");
-                        }
-                        if (local.kind === 221 || local.kind === 225 || local.kind === 224) {
-                            emitDeclarationName(local);
-                        }
-                        else {
-                            emit(local);
-                        }
-                        var flags = ts.getCombinedNodeFlags(local.kind === 69 ? local.parent : local);
-                        if (flags & 1) {
-                            if (!exportedDeclarations) {
-                                exportedDeclarations = [];
-                            }
-                            exportedDeclarations.push(local);
-                        }
-                    }
-                    write(";");
-                }
-                if (hoistedFunctionDeclarations) {
-                    for (var _a = 0, hoistedFunctionDeclarations_1 = hoistedFunctionDeclarations; _a < hoistedFunctionDeclarations_1.length; _a++) {
-                        var f = hoistedFunctionDeclarations_1[_a];
-                        writeLine();
-                        emit(f);
-                        if (f.flags & 1) {
-                            if (!exportedDeclarations) {
-                                exportedDeclarations = [];
-                            }
-                            exportedDeclarations.push(f);
-                        }
-                    }
-                }
-                return exportedDeclarations;
-                function visit(node) {
-                    if (node.flags & 2) {
-                        return;
-                    }
-                    if (node.kind === 220) {
-                        if (!hoistedFunctionDeclarations) {
-                            hoistedFunctionDeclarations = [];
-                        }
-                        hoistedFunctionDeclarations.push(node);
-                        return;
-                    }
-                    if (node.kind === 221) {
-                        if (!hoistedVars) {
-                            hoistedVars = [];
-                        }
-                        hoistedVars.push(node);
-                        return;
-                    }
-                    if (node.kind === 224) {
-                        if (shouldEmitEnumDeclaration(node)) {
-                            if (!hoistedVars) {
-                                hoistedVars = [];
-                            }
-                            hoistedVars.push(node);
-                        }
-                        return;
-                    }
-                    if (node.kind === 225) {
-                        if (shouldEmitModuleDeclaration(node)) {
-                            if (!hoistedVars) {
-                                hoistedVars = [];
-                            }
-                            hoistedVars.push(node);
-                        }
-                        return;
-                    }
-                    if (node.kind === 218 || node.kind === 169) {
-                        if (shouldHoistVariable(node, false)) {
-                            var name_32 = node.name;
-                            if (name_32.kind === 69) {
-                                if (!hoistedVars) {
-                                    hoistedVars = [];
-                                }
-                                hoistedVars.push(name_32);
-                            }
-                            else {
-                                ts.forEachChild(name_32, visit);
-                            }
-                        }
-                        return;
-                    }
-                    if (ts.isInternalModuleImportEqualsDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
-                        if (!hoistedVars) {
-                            hoistedVars = [];
-                        }
-                        hoistedVars.push(node.name);
-                        return;
-                    }
-                    if (ts.isBindingPattern(node)) {
-                        ts.forEach(node.elements, visit);
-                        return;
-                    }
-                    if (!ts.isDeclaration(node)) {
-                        ts.forEachChild(node, visit);
-                    }
-                }
-            }
-            function shouldHoistVariable(node, checkIfSourceFileLevelDecl) {
-                if (checkIfSourceFileLevelDecl && !shouldHoistDeclarationInSystemJsModule(node)) {
-                    return false;
-                }
-                return (ts.getCombinedNodeFlags(node) & 3072) === 0 ||
-                    ts.getEnclosingBlockScopeContainer(node).kind === 256;
-            }
-            function isCurrentFileSystemExternalModule() {
-                return modulekind === ts.ModuleKind.System && isCurrentFileExternalModule;
-            }
-            function emitSystemModuleBody(node, dependencyGroups, startIndex) {
-                emitVariableDeclarationsForImports();
-                writeLine();
-                var exportedDeclarations = processTopLevelVariableAndFunctionDeclarations(node);
-                var exportStarFunction = emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations);
-                writeLine();
-                write("return {");
-                increaseIndent();
-                writeLine();
-                emitSetters(exportStarFunction, dependencyGroups);
-                writeLine();
-                emitExecute(node, startIndex);
-                decreaseIndent();
-                writeLine();
-                write("}");
-                emitTempDeclarations(true);
-            }
-            function emitSetters(exportStarFunction, dependencyGroups) {
-                write("setters:[");
-                for (var i = 0; i < dependencyGroups.length; i++) {
-                    if (i !== 0) {
-                        write(",");
-                    }
-                    writeLine();
-                    increaseIndent();
-                    var group = dependencyGroups[i];
-                    var parameterName = makeUniqueName(ts.forEach(group, getLocalNameForExternalImport) || "");
-                    write("function (" + parameterName + ") {");
-                    increaseIndent();
-                    for (var _a = 0, group_1 = group; _a < group_1.length; _a++) {
-                        var entry = group_1[_a];
-                        var importVariableName = getLocalNameForExternalImport(entry) || "";
-                        switch (entry.kind) {
-                            case 230:
-                                if (!entry.importClause) {
-                                    break;
-                                }
-                            case 229:
-                                ts.Debug.assert(importVariableName !== "");
-                                writeLine();
-                                write(importVariableName + " = " + parameterName + ";");
-                                writeLine();
-                                break;
-                            case 236:
-                                ts.Debug.assert(importVariableName !== "");
-                                if (entry.exportClause) {
-                                    writeLine();
-                                    write(exportFunctionForFile + "({");
-                                    writeLine();
-                                    increaseIndent();
-                                    for (var i_1 = 0, len = entry.exportClause.elements.length; i_1 < len; i_1++) {
-                                        if (i_1 !== 0) {
-                                            write(",");
-                                            writeLine();
-                                        }
-                                        var e = entry.exportClause.elements[i_1];
-                                        write("\"");
-                                        emitNodeWithCommentsAndWithoutSourcemap(e.name);
-                                        write("\": " + parameterName + "[\"");
-                                        emitNodeWithCommentsAndWithoutSourcemap(e.propertyName || e.name);
-                                        write("\"]");
-                                    }
-                                    decreaseIndent();
-                                    writeLine();
-                                    write("});");
-                                }
-                                else {
-                                    writeLine();
-                                    write(exportStarFunction + "(" + parameterName + ");");
-                                }
-                                writeLine();
-                                break;
-                        }
-                    }
-                    decreaseIndent();
-                    write("}");
-                    decreaseIndent();
-                }
-                write("],");
-            }
-            function emitExecute(node, startIndex) {
-                write("execute: function() {");
-                increaseIndent();
-                writeLine();
-                for (var i = startIndex; i < node.statements.length; i++) {
-                    var statement = node.statements[i];
-                    switch (statement.kind) {
-                        case 220:
-                        case 230:
-                            continue;
-                        case 236:
-                            if (!statement.moduleSpecifier) {
-                                for (var _a = 0, _b = statement.exportClause.elements; _a < _b.length; _a++) {
-                                    var element = _b[_a];
-                                    emitExportSpecifierInSystemModule(element);
-                                }
-                            }
-                            continue;
-                        case 229:
-                            if (!ts.isInternalModuleImportEqualsDeclaration(statement)) {
-                                continue;
-                            }
-                        default:
-                            writeLine();
-                            emit(statement);
-                    }
-                }
-                decreaseIndent();
-                writeLine();
-                write("}");
-            }
-            function writeModuleName(node, emitRelativePathAsModuleName) {
-                var moduleName = node.moduleName;
-                if (moduleName || (emitRelativePathAsModuleName && (moduleName = getResolvedExternalModuleName(host, node)))) {
-                    write("\"" + moduleName + "\", ");
-                }
-            }
-            function emitSystemModule(node, emitRelativePathAsModuleName) {
-                collectExternalModuleInfo(node);
-                ts.Debug.assert(!exportFunctionForFile);
-                exportFunctionForFile = makeUniqueName("exports");
-                contextObjectForFile = makeUniqueName("context");
-                writeLine();
-                write("System.register(");
-                writeModuleName(node, emitRelativePathAsModuleName);
-                write("[");
-                var groupIndices = {};
-                var dependencyGroups = [];
-                for (var i = 0; i < externalImports.length; i++) {
-                    var text = getExternalModuleNameText(externalImports[i], emitRelativePathAsModuleName);
-                    if (text === undefined) {
-                        continue;
-                    }
-                    var key = text.substr(1, text.length - 2);
-                    if (ts.hasProperty(groupIndices, key)) {
-                        var groupIndex = groupIndices[key];
-                        dependencyGroups[groupIndex].push(externalImports[i]);
-                        continue;
-                    }
-                    else {
-                        groupIndices[key] = dependencyGroups.length;
-                        dependencyGroups.push([externalImports[i]]);
-                    }
-                    if (i !== 0) {
-                        write(", ");
-                    }
-                    write(text);
-                }
-                write("], function(" + exportFunctionForFile + ", " + contextObjectForFile + ") {");
-                writeLine();
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
-                writeLine();
-                write("var __moduleName = " + contextObjectForFile + " && " + contextObjectForFile + ".id;");
-                writeLine();
-                emitEmitHelpers(node);
-                emitCaptureThisForNodeIfNecessary(node);
-                emitSystemModuleBody(node, dependencyGroups, startIndex);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
-                var aliasedModuleNames = [];
-                var unaliasedModuleNames = [];
-                var importAliasNames = [];
-                for (var _a = 0, _b = node.amdDependencies; _a < _b.length; _a++) {
-                    var amdDependency = _b[_a];
-                    if (amdDependency.name) {
-                        aliasedModuleNames.push('"' + amdDependency.path + '"');
-                        importAliasNames.push(amdDependency.name);
-                    }
-                    else {
-                        unaliasedModuleNames.push('"' + amdDependency.path + '"');
-                    }
-                }
-                for (var _c = 0, externalImports_4 = externalImports; _c < externalImports_4.length; _c++) {
-                    var importNode = externalImports_4[_c];
-                    var externalModuleName = getExternalModuleNameText(importNode, emitRelativePathAsModuleName);
-                    var importAliasName = getLocalNameForExternalImport(importNode);
-                    if (includeNonAmdDependencies && importAliasName) {
-                        aliasedModuleNames.push(externalModuleName);
-                        importAliasNames.push(importAliasName);
-                    }
-                    else {
-                        unaliasedModuleNames.push(externalModuleName);
-                    }
-                }
-                return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
-            }
-            function emitAMDDependencies(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
-                var dependencyNames = getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName);
-                emitAMDDependencyList(dependencyNames);
-                write(", ");
-                emitAMDFactoryHeader(dependencyNames);
-            }
-            function emitAMDDependencyList(_a) {
-                var aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames;
-                write('["require", "exports"');
-                if (aliasedModuleNames.length) {
-                    write(", ");
-                    write(aliasedModuleNames.join(", "));
-                }
-                if (unaliasedModuleNames.length) {
-                    write(", ");
-                    write(unaliasedModuleNames.join(", "));
-                }
-                write("]");
-            }
-            function emitAMDFactoryHeader(_a) {
-                var importAliasNames = _a.importAliasNames;
-                write("function (require, exports");
-                if (importAliasNames.length) {
-                    write(", ");
-                    write(importAliasNames.join(", "));
-                }
-                write(") {");
-            }
-            function emitAMDModule(node, emitRelativePathAsModuleName) {
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                writeLine();
-                write("define(");
-                writeModuleName(node, emitRelativePathAsModuleName);
-                emitAMDDependencies(node, true, emitRelativePathAsModuleName);
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(true);
-                emitTempDeclarations(true);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function emitCommonJSModule(node) {
-                var startIndex = emitDirectivePrologues(node.statements, false, !compilerOptions.noImplicitUseStrict);
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(false);
-                emitTempDeclarations(true);
-            }
-            function emitUMDModule(node) {
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                var dependencyNames = getAMDDependencyNames(node, false);
-                writeLines("(function (factory) {\n    if (typeof module === 'object' && typeof module.exports === 'object') {\n        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n    }\n    else if (typeof define === 'function' && define.amd) {\n        define(");
-                emitAMDDependencyList(dependencyNames);
-                write(", factory);");
-                writeLines("    }\n})(");
-                emitAMDFactoryHeader(dependencyNames);
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(true);
-                emitTempDeclarations(true);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function emitES6Module(node) {
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                var startIndex = emitDirectivePrologues(node.statements, false);
-                emitEmitHelpers(node);
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitTempDeclarations(true);
-            }
-            function emitExportEquals(emitAsReturn) {
-                if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) {
-                    writeLine();
-                    emitStart(exportEquals);
-                    write(emitAsReturn ? "return " : "module.exports = ");
-                    emit(exportEquals.expression);
-                    write(";");
-                    emitEnd(exportEquals);
-                }
-            }
-            function emitJsxElement(node) {
-                switch (compilerOptions.jsx) {
-                    case 2:
-                        jsxEmitReact(node);
-                        break;
-                    case 1:
-                    default:
-                        jsxEmitPreserve(node);
-                        break;
-                }
-            }
-            function trimReactWhitespaceAndApplyEntities(node) {
-                var result = undefined;
-                var text = ts.getTextOfNode(node, true);
-                var firstNonWhitespace = 0;
-                var lastNonWhitespace = -1;
-                for (var i = 0; i < text.length; i++) {
-                    var c = text.charCodeAt(i);
-                    if (ts.isLineBreak(c)) {
-                        if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) {
-                            var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1);
-                            result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
-                        }
-                        firstNonWhitespace = -1;
-                    }
-                    else if (!ts.isWhiteSpace(c)) {
-                        lastNonWhitespace = i;
-                        if (firstNonWhitespace === -1) {
-                            firstNonWhitespace = i;
-                        }
-                    }
-                }
-                if (firstNonWhitespace !== -1) {
-                    var part = text.substr(firstNonWhitespace);
-                    result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
-                }
-                if (result) {
-                    result = result.replace(/&(\w+);/g, function (s, m) {
-                        if (entities[m] !== undefined) {
-                            var ch = String.fromCharCode(entities[m]);
-                            return ch === '"' ? "\\\"" : ch;
-                        }
-                        else {
-                            return s;
-                        }
-                    });
-                }
-                return result;
-            }
-            function isJsxChildEmittable(child) {
-                if (child.kind === 248) {
-                    return !!child.expression;
-                }
-                else if (child.kind === 244) {
-                    return !!getTextToEmit(child);
-                }
-                return true;
-            }
-            ;
-            function getTextToEmit(node) {
-                switch (compilerOptions.jsx) {
-                    case 2:
-                        var text = trimReactWhitespaceAndApplyEntities(node);
-                        if (text === undefined || text.length === 0) {
-                            return undefined;
-                        }
-                        else {
-                            return text;
-                        }
-                    case 1:
-                    default:
-                        return ts.getTextOfNode(node, true);
-                }
-            }
-            function emitJsxText(node) {
-                switch (compilerOptions.jsx) {
-                    case 2:
-                        write('"');
-                        write(trimReactWhitespaceAndApplyEntities(node));
-                        write('"');
-                        break;
-                    case 1:
-                    default:
-                        writer.writeLiteral(ts.getTextOfNode(node, true));
-                        break;
-                }
-            }
-            function emitJsxExpression(node) {
-                if (node.expression) {
-                    switch (compilerOptions.jsx) {
-                        case 1:
-                        default:
-                            write("{");
-                            emit(node.expression);
-                            write("}");
-                            break;
-                        case 2:
-                            emit(node.expression);
-                            break;
-                    }
-                }
-            }
-            function isUseStrictPrologue(node) {
-                return node.expression.text === "use strict";
-            }
-            function ensureUseStrictPrologue(startWithNewLine, writeUseStrict) {
-                if (writeUseStrict) {
-                    if (startWithNewLine) {
-                        writeLine();
-                    }
-                    write("\"use strict\";");
-                }
-            }
-            function emitDirectivePrologues(statements, startWithNewLine, ensureUseStrict) {
-                var foundUseStrict = false;
-                for (var i = 0; i < statements.length; i++) {
-                    if (ts.isPrologueDirective(statements[i])) {
-                        if (isUseStrictPrologue(statements[i])) {
-                            foundUseStrict = true;
-                        }
-                        if (startWithNewLine || i > 0) {
-                            writeLine();
-                        }
-                        emit(statements[i]);
-                    }
-                    else {
-                        ensureUseStrictPrologue(startWithNewLine || i > 0, !foundUseStrict && ensureUseStrict);
-                        return i;
-                    }
-                }
-                ensureUseStrictPrologue(startWithNewLine, !foundUseStrict && ensureUseStrict);
-                return statements.length;
-            }
-            function writeLines(text) {
-                var lines = text.split(/\r\n|\r|\n/g);
-                for (var i = 0; i < lines.length; i++) {
-                    var line = lines[i];
-                    if (line.length) {
-                        writeLine();
-                        write(line);
-                    }
-                }
-            }
-            function emitEmitHelpers(node) {
-                if (!compilerOptions.noEmitHelpers) {
-                    if (languageVersion < 2 && !extendsEmitted && node.flags & 262144) {
-                        writeLines(extendsHelper);
-                        extendsEmitted = true;
-                    }
-                    if (compilerOptions.jsx !== 1 && !assignEmitted && (node.flags & 1073741824)) {
-                        writeLines(assignHelper);
-                        assignEmitted = true;
-                    }
-                    if (!decorateEmitted && node.flags & 524288) {
-                        writeLines(decorateHelper);
-                        if (compilerOptions.emitDecoratorMetadata) {
-                            writeLines(metadataHelper);
-                        }
-                        decorateEmitted = true;
-                    }
-                    if (!paramEmitted && node.flags & 1048576) {
-                        writeLines(paramHelper);
-                        paramEmitted = true;
-                    }
-                    if (!awaiterEmitted && node.flags & 2097152) {
-                        writeLines(awaiterHelper);
-                        awaiterEmitted = true;
-                    }
-                }
-            }
-            function emitSourceFileNode(node) {
-                writeLine();
-                emitShebang();
-                emitDetachedCommentsAndUpdateCommentsInfo(node);
-                if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
-                    if (isOwnFileEmit || (!ts.isExternalModule(node) && compilerOptions.isolatedModules)) {
-                        var emitModule = moduleEmitDelegates[modulekind] || moduleEmitDelegates[ts.ModuleKind.CommonJS];
-                        emitModule(node);
-                    }
-                    else {
-                        bundleEmitDelegates[modulekind](node, true);
-                    }
-                }
-                else {
-                    var startIndex = emitDirectivePrologues(node.statements, false);
-                    externalImports = undefined;
-                    exportSpecifiers = undefined;
-                    exportEquals = undefined;
-                    hasExportStarsToExportValues = false;
-                    emitEmitHelpers(node);
-                    emitCaptureThisForNodeIfNecessary(node);
-                    emitLinesStartingAt(node.statements, startIndex);
-                    emitTempDeclarations(true);
-                }
-                emitLeadingComments(node.endOfFileToken);
-            }
-            function emit(node) {
-                emitNodeConsideringCommentsOption(node, emitNodeWithSourceMap);
-            }
-            function emitNodeWithCommentsAndWithoutSourcemap(node) {
-                emitNodeConsideringCommentsOption(node, emitNodeWithoutSourceMap);
-            }
-            function emitNodeConsideringCommentsOption(node, emitNodeConsideringSourcemap) {
-                if (node) {
-                    if (node.flags & 2) {
-                        return emitCommentsOnNotEmittedNode(node);
-                    }
-                    if (isSpecializedCommentHandling(node)) {
-                        return emitNodeWithoutSourceMap(node);
-                    }
-                    var emitComments_1 = shouldEmitLeadingAndTrailingComments(node);
-                    if (emitComments_1) {
-                        emitLeadingComments(node);
-                    }
-                    emitNodeConsideringSourcemap(node);
-                    if (emitComments_1) {
-                        emitTrailingComments(node);
-                    }
-                }
-            }
-            function emitNodeWithSourceMap(node) {
-                if (node) {
-                    emitStart(node);
-                    emitNodeWithoutSourceMap(node);
-                    emitEnd(node);
-                }
-            }
-            function emitNodeWithoutSourceMap(node) {
-                if (node) {
-                    emitJavaScriptWorker(node);
-                }
-            }
-            function changeSourceMapEmit(writer) {
-                sourceMap = writer;
-                emitStart = writer.emitStart;
-                emitEnd = writer.emitEnd;
-                emitPos = writer.emitPos;
-                setSourceFile = writer.setSourceFile;
-            }
-            function withTemporaryNoSourceMap(callback) {
-                var prevSourceMap = sourceMap;
-                setSourceMapWriterEmit(ts.getNullSourceMapWriter());
-                callback();
-                setSourceMapWriterEmit(prevSourceMap);
-            }
-            function isSpecializedCommentHandling(node) {
-                switch (node.kind) {
-                    case 222:
-                    case 220:
-                    case 230:
-                    case 229:
-                    case 223:
-                    case 235:
-                        return true;
-                }
-            }
-            function shouldEmitLeadingAndTrailingComments(node) {
-                switch (node.kind) {
-                    case 200:
-                        return shouldEmitLeadingAndTrailingCommentsForVariableStatement(node);
-                    case 225:
-                        return shouldEmitModuleDeclaration(node);
-                    case 224:
-                        return shouldEmitEnumDeclaration(node);
-                }
-                ts.Debug.assert(!isSpecializedCommentHandling(node));
-                if (node.kind !== 199 &&
-                    node.parent &&
-                    node.parent.kind === 180 &&
-                    node.parent.body === node &&
-                    languageVersion <= 1) {
-                    return false;
-                }
-                return true;
-            }
-            function emitJavaScriptWorker(node) {
-                switch (node.kind) {
-                    case 69:
-                        return emitIdentifier(node);
-                    case 142:
-                        return emitParameter(node);
-                    case 147:
-                    case 146:
-                        return emitMethod(node);
-                    case 149:
-                    case 150:
-                        return emitAccessor(node);
-                    case 97:
-                        return emitThis(node);
-                    case 95:
-                        return emitSuper(node);
-                    case 93:
-                        return write("null");
-                    case 99:
-                        return write("true");
-                    case 84:
-                        return write("false");
-                    case 8:
-                    case 9:
-                    case 10:
-                    case 11:
-                    case 12:
-                    case 13:
-                    case 14:
-                        return emitLiteral(node);
-                    case 189:
-                        return emitTemplateExpression(node);
-                    case 197:
-                        return emitTemplateSpan(node);
-                    case 241:
-                    case 242:
-                        return emitJsxElement(node);
-                    case 244:
-                        return emitJsxText(node);
-                    case 248:
-                        return emitJsxExpression(node);
-                    case 139:
-                        return emitQualifiedName(node);
-                    case 167:
-                        return emitObjectBindingPattern(node);
-                    case 168:
-                        return emitArrayBindingPattern(node);
-                    case 169:
-                        return emitBindingElement(node);
-                    case 170:
-                        return emitArrayLiteral(node);
-                    case 171:
-                        return emitObjectLiteral(node);
-                    case 253:
-                        return emitPropertyAssignment(node);
-                    case 254:
-                        return emitShorthandPropertyAssignment(node);
-                    case 140:
-                        return emitComputedPropertyName(node);
-                    case 172:
-                        return emitPropertyAccess(node);
-                    case 173:
-                        return emitIndexedAccess(node);
-                    case 174:
-                        return emitCallExpression(node);
-                    case 175:
-                        return emitNewExpression(node);
-                    case 176:
-                        return emitTaggedTemplateExpression(node);
-                    case 177:
-                    case 195:
-                    case 196:
-                        return emit(node.expression);
-                    case 178:
-                        return emitParenExpression(node);
-                    case 220:
-                    case 179:
-                    case 180:
-                        return emitFunctionDeclaration(node);
-                    case 181:
-                        return emitDeleteExpression(node);
-                    case 182:
-                        return emitTypeOfExpression(node);
-                    case 183:
-                        return emitVoidExpression(node);
-                    case 184:
-                        return emitAwaitExpression(node);
-                    case 185:
-                        return emitPrefixUnaryExpression(node);
-                    case 186:
-                        return emitPostfixUnaryExpression(node);
-                    case 187:
-                        return emitBinaryExpression(node);
-                    case 188:
-                        return emitConditionalExpression(node);
-                    case 191:
-                        return emitSpreadElementExpression(node);
-                    case 190:
-                        return emitYieldExpression(node);
-                    case 193:
-                        return;
-                    case 199:
-                    case 226:
-                        return emitBlock(node);
-                    case 200:
-                        return emitVariableStatement(node);
-                    case 201:
-                        return write(";");
-                    case 202:
-                        return emitExpressionStatement(node);
-                    case 203:
-                        return emitIfStatement(node);
-                    case 204:
-                        return emitDoStatement(node);
-                    case 205:
-                        return emitWhileStatement(node);
-                    case 206:
-                        return emitForStatement(node);
-                    case 208:
-                    case 207:
-                        return emitForInOrForOfStatement(node);
-                    case 209:
-                    case 210:
-                        return emitBreakOrContinueStatement(node);
-                    case 211:
-                        return emitReturnStatement(node);
-                    case 212:
-                        return emitWithStatement(node);
-                    case 213:
-                        return emitSwitchStatement(node);
-                    case 249:
-                    case 250:
-                        return emitCaseOrDefaultClause(node);
-                    case 214:
-                        return emitLabeledStatement(node);
-                    case 215:
-                        return emitThrowStatement(node);
-                    case 216:
-                        return emitTryStatement(node);
-                    case 252:
-                        return emitCatchClause(node);
-                    case 217:
-                        return emitDebuggerStatement(node);
-                    case 218:
-                        return emitVariableDeclaration(node);
-                    case 192:
-                        return emitClassExpression(node);
-                    case 221:
-                        return emitClassDeclaration(node);
-                    case 222:
-                        return emitInterfaceDeclaration(node);
-                    case 224:
-                        return emitEnumDeclaration(node);
-                    case 255:
-                        return emitEnumMember(node);
-                    case 225:
-                        return emitModuleDeclaration(node);
-                    case 230:
-                        return emitImportDeclaration(node);
-                    case 229:
-                        return emitImportEqualsDeclaration(node);
-                    case 236:
-                        return emitExportDeclaration(node);
-                    case 235:
-                        return emitExportAssignment(node);
-                    case 256:
-                        return emitSourceFileNode(node);
-                }
-            }
-            function hasDetachedComments(pos) {
-                return detachedCommentsInfo !== undefined && ts.lastOrUndefined(detachedCommentsInfo).nodePos === pos;
-            }
-            function getLeadingCommentsWithoutDetachedComments() {
-                var leadingComments = ts.getLeadingCommentRanges(currentText, ts.lastOrUndefined(detachedCommentsInfo).detachedCommentEndPos);
-                if (detachedCommentsInfo.length - 1) {
-                    detachedCommentsInfo.pop();
-                }
-                else {
-                    detachedCommentsInfo = undefined;
-                }
-                return leadingComments;
-            }
-            function isTripleSlashComment(comment) {
-                if (currentText.charCodeAt(comment.pos + 1) === 47 &&
-                    comment.pos + 2 < comment.end &&
-                    currentText.charCodeAt(comment.pos + 2) === 47) {
-                    var textSubStr = currentText.substring(comment.pos, comment.end);
-                    return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) ||
-                        textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ?
-                        true : false;
-                }
-                return false;
-            }
-            function getLeadingCommentsToEmit(node) {
-                if (node.parent) {
-                    if (node.parent.kind === 256 || node.pos !== node.parent.pos) {
-                        if (hasDetachedComments(node.pos)) {
-                            return getLeadingCommentsWithoutDetachedComments();
-                        }
-                        else {
-                            return ts.getLeadingCommentRangesOfNodeFromText(node, currentText);
-                        }
-                    }
-                }
-            }
-            function getTrailingCommentsToEmit(node) {
-                if (node.parent) {
-                    if (node.parent.kind === 256 || node.end !== node.parent.end) {
-                        return ts.getTrailingCommentRanges(currentText, node.end);
-                    }
-                }
-            }
-            function emitCommentsOnNotEmittedNode(node) {
-                emitLeadingCommentsWorker(node, false);
-            }
-            function emitLeadingComments(node) {
-                return emitLeadingCommentsWorker(node, true);
-            }
-            function emitLeadingCommentsWorker(node, isEmittedNode) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var leadingComments;
-                if (isEmittedNode) {
-                    leadingComments = getLeadingCommentsToEmit(node);
-                }
-                else {
-                    if (node.pos === 0) {
-                        leadingComments = ts.filter(getLeadingCommentsToEmit(node), isTripleSlashComment);
-                    }
-                }
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, node, leadingComments);
-                ts.emitComments(currentText, currentLineMap, writer, leadingComments, true, newLine, writeComment);
-            }
-            function emitTrailingComments(node) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var trailingComments = getTrailingCommentsToEmit(node);
-                ts.emitComments(currentText, currentLineMap, writer, trailingComments, false, newLine, writeComment);
-            }
-            function emitTrailingCommentsOfPosition(pos) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var trailingComments = ts.getTrailingCommentRanges(currentText, pos);
-                ts.emitComments(currentText, currentLineMap, writer, trailingComments, true, newLine, writeComment);
-            }
-            function emitLeadingCommentsOfPositionWorker(pos) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var leadingComments;
-                if (hasDetachedComments(pos)) {
-                    leadingComments = getLeadingCommentsWithoutDetachedComments();
-                }
-                else {
-                    leadingComments = ts.getLeadingCommentRanges(currentText, pos);
-                }
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, { pos: pos, end: pos }, leadingComments);
-                ts.emitComments(currentText, currentLineMap, writer, leadingComments, true, newLine, writeComment);
-            }
-            function emitDetachedCommentsAndUpdateCommentsInfo(node) {
-                var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, node, newLine, compilerOptions.removeComments);
-                if (currentDetachedCommentInfo) {
-                    if (detachedCommentsInfo) {
-                        detachedCommentsInfo.push(currentDetachedCommentInfo);
-                    }
-                    else {
-                        detachedCommentsInfo = [currentDetachedCommentInfo];
-                    }
-                }
-            }
-            function writeComment(text, lineMap, writer, comment, newLine) {
-                emitPos(comment.pos);
-                ts.writeCommentRange(text, lineMap, writer, comment, newLine);
-                emitPos(comment.end);
-            }
-            function emitShebang() {
-                var shebang = ts.getShebang(currentText);
-                if (shebang) {
-                    write(shebang);
-                    writeLine();
-                }
-            }
-            var _a, _b;
-        }
-        function emitFile(_a, sourceFiles, isBundledEmit) {
-            var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath;
-            if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
-                emitJavaScript(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
-            }
-            else {
-                emitSkipped = true;
-            }
-            if (declarationFilePath) {
-                emitSkipped = ts.writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) || emitSkipped;
-            }
-            if (!emitSkipped && emittedFilesList) {
-                emittedFilesList.push(jsFilePath);
-                if (sourceMapFilePath) {
-                    emittedFilesList.push(sourceMapFilePath);
-                }
-                if (declarationFilePath) {
-                    emittedFilesList.push(declarationFilePath);
-                }
-            }
-        }
-    }
-    ts.emitFiles = emitFiles;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.programTime = 0;
-    ts.emitTime = 0;
-    ts.ioReadTime = 0;
-    ts.ioWriteTime = 0;
-    var emptyArray = [];
-    var defaultLibrarySearchPaths = [
-        "types/",
-        "node_modules/",
-        "node_modules/@types/",
-    ];
-    ts.version = "1.9.0";
-    function findConfigFile(searchPath, fileExists) {
-        while (true) {
-            var fileName = ts.combinePaths(searchPath, "tsconfig.json");
-            if (fileExists(fileName)) {
-                return fileName;
-            }
-            var parentPath = ts.getDirectoryPath(searchPath);
-            if (parentPath === searchPath) {
-                break;
-            }
-            searchPath = parentPath;
-        }
-        return undefined;
-    }
-    ts.findConfigFile = findConfigFile;
-    function resolveTripleslashReference(moduleName, containingFile) {
-        var basePath = ts.getDirectoryPath(containingFile);
-        var referencedFileName = ts.isRootedDiskPath(moduleName) ? moduleName : ts.combinePaths(basePath, moduleName);
-        return ts.normalizePath(referencedFileName);
-    }
-    ts.resolveTripleslashReference = resolveTripleslashReference;
-    function computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName) {
-        var commonPathComponents;
-        var failed = ts.forEach(fileNames, function (sourceFile) {
-            var sourcePathComponents = ts.getNormalizedPathComponents(sourceFile, currentDirectory);
-            sourcePathComponents.pop();
-            if (!commonPathComponents) {
-                commonPathComponents = sourcePathComponents;
-                return;
-            }
-            for (var i = 0, n = Math.min(commonPathComponents.length, sourcePathComponents.length); i < n; i++) {
-                if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
-                    if (i === 0) {
-                        return true;
-                    }
-                    commonPathComponents.length = i;
-                    break;
-                }
-            }
-            if (sourcePathComponents.length < commonPathComponents.length) {
-                commonPathComponents.length = sourcePathComponents.length;
-            }
-        });
-        if (failed) {
-            return "";
-        }
-        if (!commonPathComponents) {
-            return currentDirectory;
-        }
-        return ts.getNormalizedPathFromPathComponents(commonPathComponents);
-    }
-    ts.computeCommonSourceDirectoryOfFilenames = computeCommonSourceDirectoryOfFilenames;
-    function trace(host, message) {
-        host.trace(ts.formatMessage.apply(undefined, arguments));
-    }
-    function isTraceEnabled(compilerOptions, host) {
-        return compilerOptions.traceResolution && host.trace !== undefined;
-    }
-    function hasZeroOrOneAsteriskCharacter(str) {
-        var seenAsterisk = false;
-        for (var i = 0; i < str.length; i++) {
-            if (str.charCodeAt(i) === 42) {
-                if (!seenAsterisk) {
-                    seenAsterisk = true;
-                }
-                else {
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-    function createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations) {
-        return { resolvedModule: resolvedFileName ? { resolvedFileName: resolvedFileName, isExternalLibraryImport: isExternalLibraryImport } : undefined, failedLookupLocations: failedLookupLocations };
-    }
-    function moduleHasNonRelativeName(moduleName) {
-        if (ts.isRootedDiskPath(moduleName)) {
-            return false;
-        }
-        var i = moduleName.lastIndexOf("./", 1);
-        var startsWithDotSlashOrDotDotSlash = i === 0 || (i === 1 && moduleName.charCodeAt(0) === 46);
-        return !startsWithDotSlashOrDotDotSlash;
-    }
-    function tryReadTypesSection(packageJsonPath, baseDirectory, state) {
-        var jsonContent;
-        try {
-            var jsonText = state.host.readFile(packageJsonPath);
-            jsonContent = jsonText ? JSON.parse(jsonText) : {};
-        }
-        catch (e) {
-            jsonContent = {};
-        }
-        var typesFile;
-        var fieldName;
-        if (jsonContent.typings) {
-            if (typeof jsonContent.typings === "string") {
-                fieldName = "typings";
-                typesFile = jsonContent.typings;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "typings", typeof jsonContent.typings);
-                }
-            }
-        }
-        if (!typesFile && jsonContent.types) {
-            if (typeof jsonContent.types === "string") {
-                fieldName = "types";
-                typesFile = jsonContent.types;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "types", typeof jsonContent.types);
-                }
-            }
-        }
-        if (typesFile) {
-            var typesFilePath = ts.normalizePath(ts.combinePaths(baseDirectory, typesFile));
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, typesFile, typesFilePath);
-            }
-            return typesFilePath;
-        }
-        return undefined;
-    }
-    var typeReferenceExtensions = [".d.ts"];
-    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
-        var traceEnabled = isTraceEnabled(options, host);
-        var moduleResolutionState = {
-            compilerOptions: options,
-            host: host,
-            skipTsx: true,
-            traceEnabled: traceEnabled
-        };
-        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
-        if (traceEnabled) {
-            if (containingFile === undefined) {
-                if (rootDir === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, rootDir);
-                }
-            }
-            else {
-                if (rootDir === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, rootDir);
-                }
-            }
-        }
-        var failedLookupLocations = [];
-        if (rootDir !== undefined) {
-            var effectivePrimarySearchPaths = options.typesSearchPaths || defaultLibrarySearchPaths;
-            for (var _i = 0, effectivePrimarySearchPaths_1 = effectivePrimarySearchPaths; _i < effectivePrimarySearchPaths_1.length; _i++) {
-                var searchPath = effectivePrimarySearchPaths_1[_i];
-                var primaryPath = ts.combinePaths(rootDir, searchPath);
-                if (traceEnabled) {
-                    trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, primaryPath);
-                }
-                var candidate = ts.combinePaths(primaryPath, typeReferenceDirectiveName);
-                var candidateDirectory = ts.getDirectoryPath(candidate);
-                var resolvedFile_1 = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations, !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
-                if (resolvedFile_1) {
-                    if (traceEnabled) {
-                        trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile_1, true);
-                    }
-                    return {
-                        resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile_1 },
-                        failedLookupLocations: failedLookupLocations
-                    };
-                }
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
-            }
-        }
-        var resolvedFile;
-        var initialLocationForSecondaryLookup;
-        if (containingFile) {
-            initialLocationForSecondaryLookup = ts.getDirectoryPath(containingFile);
-        }
-        else {
-            initialLocationForSecondaryLookup = rootDir;
-        }
-        if (initialLocationForSecondaryLookup !== undefined) {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
-            }
-            resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState);
-            if (traceEnabled) {
-                if (resolvedFile) {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
-                }
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
-            }
-        }
-        return {
-            resolvedTypeReferenceDirective: resolvedFile
-                ? { primary: false, resolvedFileName: resolvedFile }
-                : undefined,
-            failedLookupLocations: failedLookupLocations
-        };
-    }
-    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
-    function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        if (traceEnabled) {
-            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
-        }
-        var moduleResolution = compilerOptions.moduleResolution;
-        if (moduleResolution === undefined) {
-            moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
-            }
-        }
-        var result;
-        switch (moduleResolution) {
-            case ts.ModuleResolutionKind.NodeJs:
-                result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-            case ts.ModuleResolutionKind.Classic:
-                result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-        }
-        if (traceEnabled) {
-            if (result.resolvedModule) {
-                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
-            }
-            else {
-                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
-            }
-        }
-        return result;
-    }
-    ts.resolveModuleName = resolveModuleName;
-    function tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (moduleHasNonRelativeName(moduleName)) {
-            return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
-        }
-        else {
-            return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
-        }
-    }
-    function tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.rootDirs) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
-        }
-        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-        var matchedRootDir;
-        var matchedNormalizedPrefix;
-        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
-            var rootDir = _a[_i];
-            var normalizedRoot = ts.normalizePath(rootDir);
-            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
-                normalizedRoot += ts.directorySeparator;
-            }
-            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
-                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
-            }
-            if (isLongestMatchingPrefix) {
-                matchedNormalizedPrefix = normalizedRoot;
-                matchedRootDir = rootDir;
-            }
-        }
-        if (matchedNormalizedPrefix) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
-            }
-            var suffix = candidate.substr(matchedNormalizedPrefix.length);
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
-            }
-            var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
-            if (resolvedFileName) {
-                return resolvedFileName;
-            }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
-            }
-            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
-                var rootDir = _c[_b];
-                if (rootDir === matchedRootDir) {
-                    continue;
-                }
-                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
-                }
-                var baseDirectory = ts.getDirectoryPath(candidate_1);
-                var resolvedFileName_1 = loader(candidate_1, supportedExtensions, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
-                if (resolvedFileName_1) {
-                    return resolvedFileName_1;
-                }
-            }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
-            }
-        }
-        return undefined;
-    }
-    function tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.baseUrl) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
-        }
-        var longestMatchPrefixLength = -1;
-        var matchedPattern;
-        var matchedStar;
-        if (state.compilerOptions.paths) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
-            }
-            for (var key in state.compilerOptions.paths) {
-                var pattern = key;
-                var indexOfStar = pattern.indexOf("*");
-                if (indexOfStar !== -1) {
-                    var prefix = pattern.substr(0, indexOfStar);
-                    var suffix = pattern.substr(indexOfStar + 1);
-                    if (moduleName.length >= prefix.length + suffix.length &&
-                        ts.startsWith(moduleName, prefix) &&
-                        ts.endsWith(moduleName, suffix)) {
-                        if (prefix.length > longestMatchPrefixLength) {
-                            longestMatchPrefixLength = prefix.length;
-                            matchedPattern = pattern;
-                            matchedStar = moduleName.substr(prefix.length, moduleName.length - suffix.length);
-                        }
-                    }
-                }
-                else if (pattern === moduleName) {
-                    matchedPattern = pattern;
-                    matchedStar = undefined;
-                    break;
-                }
-            }
-        }
-        if (matchedPattern) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPattern);
-            }
-            for (var _i = 0, _a = state.compilerOptions.paths[matchedPattern]; _i < _a.length; _i++) {
-                var subst = _a[_i];
-                var path = matchedStar ? subst.replace("\*", matchedStar) : subst;
-                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
-                }
-                var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
-                if (resolvedFileName) {
-                    return resolvedFileName;
-                }
-            }
-            return undefined;
-        }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
-            }
-            return loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
-        }
-    }
-    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var failedLookupLocations = [];
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: false };
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName, failedLookupLocations, supportedExtensions, state);
-        var isExternalLibraryImport = false;
-        if (!resolvedFileName) {
-            if (moduleHasNonRelativeName(moduleName)) {
-                if (traceEnabled) {
-                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
-                }
-                resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state);
-                isExternalLibraryImport = resolvedFileName !== undefined;
-            }
-            else {
-                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, false, state);
-            }
-        }
-        if (resolvedFileName && host.realpath) {
-            var originalFileName = resolvedFileName;
-            resolvedFileName = ts.normalizePath(host.realpath(resolvedFileName));
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
-            }
-        }
-        return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
-    }
-    ts.nodeModuleNameResolver = nodeModuleNameResolver;
-    function nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state) {
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
-        }
-        var resolvedFileName = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
-        return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
-    }
-    function directoryProbablyExists(directoryName, host) {
-        return !host.directoryExists || host.directoryExists(directoryName);
-    }
-    ts.directoryProbablyExists = directoryProbablyExists;
-    function loadModuleFromFile(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
-        if (!onlyRecordFailures) {
-            var directory = ts.getDirectoryPath(candidate);
-            if (directory) {
-                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
-            }
-        }
-        return ts.forEach(extensions, tryLoad);
-        function tryLoad(ext) {
-            if (ext === ".tsx" && state.skipTsx) {
-                return undefined;
-            }
-            var fileName = ts.fileExtensionIs(candidate, ext) ? candidate : candidate + ext;
-            if (!onlyRecordFailures && state.host.fileExists(fileName)) {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
-                }
-                return fileName;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
-                }
-                failedLookupLocation.push(fileName);
-                return undefined;
-            }
-        }
-    }
-    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocation, onlyRecordFailures, state) {
-        var packageJsonPath = ts.combinePaths(candidate, "package.json");
-        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
-        if (directoryExists && state.host.fileExists(packageJsonPath)) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
-            }
-            var typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
-            if (typesFile) {
-                var result = loadModuleFromFile(typesFile, extensions, failedLookupLocation, !directoryProbablyExists(ts.getDirectoryPath(typesFile), state.host), state);
-                if (result) {
-                    return result;
-                }
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.package_json_does_not_have_types_field);
-                }
-            }
-        }
-        else {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
-            }
-            failedLookupLocation.push(packageJsonPath);
-        }
-        return loadModuleFromFile(ts.combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
-    }
-    function loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) {
-        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
-        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
-        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
-        var result = loadModuleFromFile(candidate, ts.supportedTypeScriptExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
-        }
-        result = loadNodeModuleFromDirectory(ts.supportedTypeScriptExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
-        }
-    }
-    function loadModuleFromNodeModules(moduleName, directory, failedLookupLocations, state) {
-        directory = ts.normalizeSlashes(directory);
-        while (true) {
-            var baseName = ts.getBaseFileName(directory);
-            if (baseName !== "node_modules") {
-                var result = loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) ||
-                    loadModuleFromNodeModulesFolder(ts.combinePaths("@types", moduleName), directory, failedLookupLocations, state);
-                if (result) {
-                    return result;
-                }
-            }
-            var parentPath = ts.getDirectoryPath(directory);
-            if (parentPath === directory) {
-                break;
-            }
-            directory = parentPath;
-        }
-        return undefined;
-    }
-    function classicNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: !compilerOptions.jsx };
-        var failedLookupLocations = [];
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
-        if (resolvedFileName) {
-            return createResolvedModule(resolvedFileName, false, failedLookupLocations);
-        }
-        var referencedSourceFile;
-        if (moduleHasNonRelativeName(moduleName)) {
-            while (true) {
-                var searchName = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, false, state);
-                if (referencedSourceFile) {
-                    break;
-                }
-                var parentPath = ts.getDirectoryPath(containingDirectory);
-                if (parentPath === containingDirectory) {
-                    break;
-                }
-                containingDirectory = parentPath;
-            }
-        }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-            referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, false, state);
-        }
-        return referencedSourceFile
-            ? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations: failedLookupLocations }
-            : { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
-    }
-    ts.classicNameResolver = classicNameResolver;
-    ts.defaultInitCompilerOptions = {
-        module: ts.ModuleKind.CommonJS,
-        target: 1,
-        noImplicitAny: false,
-        sourceMap: false
-    };
-    function createCompilerHost(options, setParentNodes) {
-        var existingDirectories = {};
-        function getCanonicalFileName(fileName) {
-            return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
-        }
-        var unsupportedFileEncodingErrorCode = -2147024809;
-        function getSourceFile(fileName, languageVersion, onError) {
-            var text;
-            try {
-                var start = new Date().getTime();
-                text = ts.sys.readFile(fileName, options.charset);
-                ts.ioReadTime += new Date().getTime() - start;
-            }
-            catch (e) {
-                if (onError) {
-                    onError(e.number === unsupportedFileEncodingErrorCode
-                        ? ts.createCompilerDiagnostic(ts.Diagnostics.Unsupported_file_encoding).messageText
-                        : e.message);
-                }
-                text = "";
-            }
-            return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
-        }
-        function directoryExists(directoryPath) {
-            if (ts.hasProperty(existingDirectories, directoryPath)) {
-                return true;
-            }
-            if (ts.sys.directoryExists(directoryPath)) {
-                existingDirectories[directoryPath] = true;
-                return true;
-            }
-            return false;
-        }
-        function ensureDirectoriesExist(directoryPath) {
-            if (directoryPath.length > ts.getRootLength(directoryPath) && !directoryExists(directoryPath)) {
-                var parentDirectory = ts.getDirectoryPath(directoryPath);
-                ensureDirectoriesExist(parentDirectory);
-                ts.sys.createDirectory(directoryPath);
-            }
-        }
-        var outputFingerprints;
-        function writeFileIfUpdated(fileName, data, writeByteOrderMark) {
-            if (!outputFingerprints) {
-                outputFingerprints = {};
-            }
-            var hash = ts.sys.createHash(data);
-            var mtimeBefore = ts.sys.getModifiedTime(fileName);
-            if (mtimeBefore && ts.hasProperty(outputFingerprints, fileName)) {
-                var fingerprint = outputFingerprints[fileName];
-                if (fingerprint.byteOrderMark === writeByteOrderMark &&
-                    fingerprint.hash === hash &&
-                    fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
-                    return;
-                }
-            }
-            ts.sys.writeFile(fileName, data, writeByteOrderMark);
-            var mtimeAfter = ts.sys.getModifiedTime(fileName);
-            outputFingerprints[fileName] = {
-                hash: hash,
-                byteOrderMark: writeByteOrderMark,
-                mtime: mtimeAfter
-            };
-        }
-        function writeFile(fileName, data, writeByteOrderMark, onError) {
-            try {
-                var start = new Date().getTime();
-                ensureDirectoriesExist(ts.getDirectoryPath(ts.normalizePath(fileName)));
-                if (ts.isWatchSet(options) && ts.sys.createHash && ts.sys.getModifiedTime) {
-                    writeFileIfUpdated(fileName, data, writeByteOrderMark);
-                }
-                else {
-                    ts.sys.writeFile(fileName, data, writeByteOrderMark);
-                }
-                ts.ioWriteTime += new Date().getTime() - start;
-            }
-            catch (e) {
-                if (onError) {
-                    onError(e.message);
-                }
-            }
-        }
-        function getDefaultTypeDirectiveNames(rootPath) {
-            var localTypes = ts.combinePaths(rootPath, "types");
-            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
-            var result = [];
-            if (ts.sys.directoryExists(localTypes)) {
-                result = result.concat(ts.sys.getDirectories(localTypes));
-            }
-            if (ts.sys.directoryExists(npmTypes)) {
-                result = result.concat(ts.sys.getDirectories(npmTypes));
-            }
-            return result;
-        }
-        function getDefaultLibLocation() {
-            return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
-        }
-        var newLine = ts.getNewLineCharacter(options);
-        var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
-        return {
-            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
-            getSourceFile: getSourceFile,
-            getDefaultLibLocation: getDefaultLibLocation,
-            getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
-            writeFile: writeFile,
-            getCurrentDirectory: ts.memoize(function () { return ts.sys.getCurrentDirectory(); }),
-            useCaseSensitiveFileNames: function () { return ts.sys.useCaseSensitiveFileNames; },
-            getCanonicalFileName: getCanonicalFileName,
-            getNewLine: function () { return newLine; },
-            fileExists: function (fileName) { return ts.sys.fileExists(fileName); },
-            readFile: function (fileName) { return ts.sys.readFile(fileName); },
-            trace: function (s) { return ts.sys.write(s + newLine); },
-            directoryExists: function (directoryName) { return ts.sys.directoryExists(directoryName); },
-            realpath: realpath
-        };
-    }
-    ts.createCompilerHost = createCompilerHost;
-    function getPreEmitDiagnostics(program, sourceFile, cancellationToken) {
-        var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
-        if (program.getCompilerOptions().declaration) {
-            diagnostics = diagnostics.concat(program.getDeclarationDiagnostics(sourceFile, cancellationToken));
-        }
-        return ts.sortAndDeduplicateDiagnostics(diagnostics);
-    }
-    ts.getPreEmitDiagnostics = getPreEmitDiagnostics;
-    function flattenDiagnosticMessageText(messageText, newLine) {
-        if (typeof messageText === "string") {
-            return messageText;
-        }
-        else {
-            var diagnosticChain = messageText;
-            var result = "";
-            var indent = 0;
-            while (diagnosticChain) {
-                if (indent) {
-                    result += newLine;
-                    for (var i = 0; i < indent; i++) {
-                        result += "  ";
-                    }
-                }
-                result += diagnosticChain.messageText;
-                indent++;
-                diagnosticChain = diagnosticChain.next;
-            }
-            return result;
-        }
-    }
-    ts.flattenDiagnosticMessageText = flattenDiagnosticMessageText;
-    function loadWithLocalCache(names, containingFile, loader) {
-        if (names.length === 0) {
-            return [];
-        }
-        var resolutions = [];
-        var cache = {};
-        for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
-            var name_33 = names_1[_i];
-            var result = void 0;
-            if (ts.hasProperty(cache, name_33)) {
-                result = cache[name_33];
-            }
-            else {
-                result = loader(name_33, containingFile);
-                cache[name_33] = result;
-            }
-            resolutions.push(result);
-        }
-        return resolutions;
-    }
-    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
-        if (options.types) {
-            return options.types;
-        }
-        if (host && host.getDefaultTypeDirectiveNames) {
-            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
-            if (commonRoot) {
-                return host.getDefaultTypeDirectiveNames(commonRoot);
-            }
-        }
-        return undefined;
-    }
-    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
-    function createProgram(rootNames, options, host, oldProgram) {
-        var program;
-        var files = [];
-        var commonSourceDirectory;
-        var diagnosticsProducingTypeChecker;
-        var noDiagnosticsTypeChecker;
-        var classifiableNames;
-        var resolvedTypeReferenceDirectives = {};
-        var fileProcessingDiagnostics = ts.createDiagnosticCollection();
-        var start = new Date().getTime();
-        host = host || createCompilerHost(options);
-        var skipDefaultLib = options.noLib;
-        var programDiagnostics = ts.createDiagnosticCollection();
-        var currentDirectory = host.getCurrentDirectory();
-        var supportedExtensions = ts.getSupportedExtensions(options);
-        var hasEmitBlockingDiagnostics = ts.createFileMap(getCanonicalFileName);
-        var resolveModuleNamesWorker;
-        if (host.resolveModuleNames) {
-            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
-        }
-        else {
-            var loader_1 = function (moduleName, containingFile) { return resolveModuleName(moduleName, containingFile, options, host).resolvedModule; };
-            resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(moduleNames, containingFile, loader_1); };
-        }
-        var resolveTypeReferenceDirectiveNamesWorker;
-        if (host.resolveTypeReferenceDirectives) {
-            resolveTypeReferenceDirectiveNamesWorker = function (typeDirectiveNames, containingFile) { return host.resolveTypeReferenceDirectives(typeDirectiveNames, containingFile); };
-        }
-        else {
-            var loader_2 = function (typesRef, containingFile) { return resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective; };
-            resolveTypeReferenceDirectiveNamesWorker = function (typeReferenceDirectiveNames, containingFile) { return loadWithLocalCache(typeReferenceDirectiveNames, containingFile, loader_2); };
-        }
-        var filesByName = ts.createFileMap();
-        var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
-        if (!tryReuseStructureFromOldProgram()) {
-            ts.forEach(rootNames, function (name) { return processRootFile(name, false); });
-            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
-            if (typeReferences) {
-                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, undefined);
-                for (var i = 0; i < typeReferences.length; i++) {
-                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
-                }
-            }
-            if (!skipDefaultLib) {
-                if (!options.lib) {
-                    processRootFile(host.getDefaultLibFileName(options), true);
-                }
-                else {
-                    var libDirectory_1 = host.getDefaultLibLocation ? host.getDefaultLibLocation() : ts.getDirectoryPath(host.getDefaultLibFileName(options));
-                    ts.forEach(options.lib, function (libFileName) {
-                        processRootFile(ts.combinePaths(libDirectory_1, libFileName), true);
-                    });
-                }
-            }
-        }
-        oldProgram = undefined;
-        program = {
-            getRootFileNames: function () { return rootNames; },
-            getSourceFile: getSourceFile,
-            getSourceFileByPath: getSourceFileByPath,
-            getSourceFiles: function () { return files; },
-            getCompilerOptions: function () { return options; },
-            getSyntacticDiagnostics: getSyntacticDiagnostics,
-            getOptionsDiagnostics: getOptionsDiagnostics,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getSemanticDiagnostics: getSemanticDiagnostics,
-            getDeclarationDiagnostics: getDeclarationDiagnostics,
-            getTypeChecker: getTypeChecker,
-            getClassifiableNames: getClassifiableNames,
-            getDiagnosticsProducingTypeChecker: getDiagnosticsProducingTypeChecker,
-            getCommonSourceDirectory: getCommonSourceDirectory,
-            emit: emit,
-            getCurrentDirectory: function () { return currentDirectory; },
-            getNodeCount: function () { return getDiagnosticsProducingTypeChecker().getNodeCount(); },
-            getIdentifierCount: function () { return getDiagnosticsProducingTypeChecker().getIdentifierCount(); },
-            getSymbolCount: function () { return getDiagnosticsProducingTypeChecker().getSymbolCount(); },
-            getTypeCount: function () { return getDiagnosticsProducingTypeChecker().getTypeCount(); },
-            getFileProcessingDiagnostics: function () { return fileProcessingDiagnostics; },
-            getResolvedTypeReferenceDirectives: function () { return resolvedTypeReferenceDirectives; }
-        };
-        verifyCompilerOptions();
-        ts.programTime += new Date().getTime() - start;
-        return program;
-        function getCommonSourceDirectory() {
-            if (typeof commonSourceDirectory === "undefined") {
-                if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
-                    commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
-                }
-                else {
-                    commonSourceDirectory = computeCommonSourceDirectory(files);
-                }
-                if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
-                    commonSourceDirectory += ts.directorySeparator;
-                }
-            }
-            return commonSourceDirectory;
-        }
-        function getClassifiableNames() {
-            if (!classifiableNames) {
-                getTypeChecker();
-                classifiableNames = {};
-                for (var _i = 0, files_3 = files; _i < files_3.length; _i++) {
-                    var sourceFile = files_3[_i];
-                    ts.copyMap(sourceFile.classifiableNames, classifiableNames);
-                }
-            }
-            return classifiableNames;
-        }
-        function tryReuseStructureFromOldProgram() {
-            if (!oldProgram) {
-                return false;
-            }
-            var oldOptions = oldProgram.getCompilerOptions();
-            if ((oldOptions.module !== options.module) ||
-                (oldOptions.noResolve !== options.noResolve) ||
-                (oldOptions.target !== options.target) ||
-                (oldOptions.noLib !== options.noLib) ||
-                (oldOptions.jsx !== options.jsx) ||
-                (oldOptions.allowJs !== options.allowJs) ||
-                (oldOptions.rootDir !== options.rootDir) ||
-                (oldOptions.typesSearchPaths !== options.typesSearchPaths) ||
-                (oldOptions.configFilePath !== options.configFilePath) ||
-                (oldOptions.baseUrl !== options.baseUrl) ||
-                (oldOptions.typesRoot !== options.typesRoot) ||
-                !ts.arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
-                !ts.mapIsEqualTo(oldOptions.paths, options.paths)) {
-                return false;
-            }
-            ts.Debug.assert(!oldProgram.structureIsReused);
-            var oldRootNames = oldProgram.getRootFileNames();
-            if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
-                return false;
-            }
-            if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
-                return false;
-            }
-            var newSourceFiles = [];
-            var filePaths = [];
-            var modifiedSourceFiles = [];
-            for (var _i = 0, _a = oldProgram.getSourceFiles(); _i < _a.length; _i++) {
-                var oldSourceFile = _a[_i];
-                var newSourceFile = host.getSourceFileByPath
-                    ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target)
-                    : host.getSourceFile(oldSourceFile.fileName, options.target);
-                if (!newSourceFile) {
-                    return false;
-                }
-                newSourceFile.path = oldSourceFile.path;
-                filePaths.push(newSourceFile.path);
-                if (oldSourceFile !== newSourceFile) {
-                    if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
-                        return false;
-                    }
-                    if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
-                        return false;
-                    }
-                    collectExternalModuleReferences(newSourceFile);
-                    if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
-                        return false;
-                    }
-                    if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
-                        return false;
-                    }
-                    if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
-                        return false;
-                    }
-                    var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
-                    if (resolveModuleNamesWorker) {
-                        var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
-                        var resolutions = resolveModuleNamesWorker(moduleNames, newSourceFilePath);
-                        var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
-                    }
-                    if (resolveTypeReferenceDirectiveNamesWorker) {
-                        var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
-                        var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
-                        var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
-                    }
-                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
-                    newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
-                    modifiedSourceFiles.push(newSourceFile);
-                }
-                else {
-                    newSourceFile = oldSourceFile;
-                }
-                newSourceFiles.push(newSourceFile);
-            }
-            for (var i = 0, len = newSourceFiles.length; i < len; i++) {
-                filesByName.set(filePaths[i], newSourceFiles[i]);
-            }
-            files = newSourceFiles;
-            fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
-            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
-                var modifiedFile = modifiedSourceFiles_1[_b];
-                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile);
-            }
-            resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
-            oldProgram.structureIsReused = true;
-            return true;
-        }
-        function getEmitHost(writeFileCallback) {
-            return {
-                getCanonicalFileName: getCanonicalFileName,
-                getCommonSourceDirectory: program.getCommonSourceDirectory,
-                getCompilerOptions: program.getCompilerOptions,
-                getCurrentDirectory: function () { return currentDirectory; },
-                getNewLine: function () { return host.getNewLine(); },
-                getSourceFile: program.getSourceFile,
-                getSourceFileByPath: program.getSourceFileByPath,
-                getSourceFiles: program.getSourceFiles,
-                writeFile: writeFileCallback || (function (fileName, data, writeByteOrderMark, onError, sourceFiles) { return host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles); }),
-                isEmitBlocked: isEmitBlocked
-            };
-        }
-        function getDiagnosticsProducingTypeChecker() {
-            return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, true));
-        }
-        function getTypeChecker() {
-            return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, false));
-        }
-        function emit(sourceFile, writeFileCallback, cancellationToken) {
-            var _this = this;
-            return runWithCancellationToken(function () { return emitWorker(_this, sourceFile, writeFileCallback, cancellationToken); });
-        }
-        function isEmitBlocked(emitFileName) {
-            return hasEmitBlockingDiagnostics.contains(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName));
-        }
-        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken) {
-            var declarationDiagnostics = [];
-            if (options.noEmit) {
-                return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
-            }
-            if (options.noEmitOnError) {
-                var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
-                if (diagnostics.length === 0 && program.getCompilerOptions().declaration) {
-                    declarationDiagnostics = program.getDeclarationDiagnostics(undefined, cancellationToken);
-                }
-                if (diagnostics.length > 0 || declarationDiagnostics.length > 0) {
-                    return {
-                        diagnostics: ts.concatenate(diagnostics, declarationDiagnostics),
-                        sourceMaps: undefined,
-                        emittedFiles: undefined,
-                        emitSkipped: true
-                    };
-                }
-            }
-            var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile);
-            var start = new Date().getTime();
-            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile);
-            ts.emitTime += new Date().getTime() - start;
-            return emitResult;
-        }
-        function getSourceFile(fileName) {
-            return getSourceFileByPath(ts.toPath(fileName, currentDirectory, getCanonicalFileName));
-        }
-        function getSourceFileByPath(path) {
-            return filesByName.get(path);
-        }
-        function getDiagnosticsHelper(sourceFile, getDiagnostics, cancellationToken) {
-            if (sourceFile) {
-                return getDiagnostics(sourceFile, cancellationToken);
-            }
-            var allDiagnostics = [];
-            ts.forEach(program.getSourceFiles(), function (sourceFile) {
-                if (cancellationToken) {
-                    cancellationToken.throwIfCancellationRequested();
-                }
-                ts.addRange(allDiagnostics, getDiagnostics(sourceFile, cancellationToken));
-            });
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function getSyntacticDiagnostics(sourceFile, cancellationToken) {
-            return getDiagnosticsHelper(sourceFile, getSyntacticDiagnosticsForFile, cancellationToken);
-        }
-        function getSemanticDiagnostics(sourceFile, cancellationToken) {
-            return getDiagnosticsHelper(sourceFile, getSemanticDiagnosticsForFile, cancellationToken);
-        }
-        function getDeclarationDiagnostics(sourceFile, cancellationToken) {
-            var options = program.getCompilerOptions();
-            if (!sourceFile || options.out || options.outFile) {
-                return getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
-            }
-            else {
-                return getDiagnosticsHelper(sourceFile, getDeclarationDiagnosticsForFile, cancellationToken);
-            }
-        }
-        function getSyntacticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return sourceFile.parseDiagnostics;
-        }
-        function runWithCancellationToken(func) {
-            try {
-                return func();
-            }
-            catch (e) {
-                if (e instanceof ts.OperationCanceledException) {
-                    noDiagnosticsTypeChecker = undefined;
-                    diagnosticsProducingTypeChecker = undefined;
-                }
-                throw e;
-            }
-        }
-        function getSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var typeChecker = getDiagnosticsProducingTypeChecker();
-                ts.Debug.assert(!!sourceFile.bindDiagnostics);
-                var bindDiagnostics = sourceFile.bindDiagnostics;
-                var checkDiagnostics = ts.isSourceFileJavaScript(sourceFile) ?
-                    getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) :
-                    typeChecker.getDiagnostics(sourceFile, cancellationToken);
-                var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
-                var programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
-                return bindDiagnostics.concat(checkDiagnostics).concat(fileProcessingDiagnosticsInFile).concat(programDiagnosticsInFile);
-            });
-        }
-        function getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var diagnostics = [];
-                walk(sourceFile);
-                return diagnostics;
-                function walk(node) {
-                    if (!node) {
-                        return false;
-                    }
-                    switch (node.kind) {
-                        case 229:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 235:
-                            if (node.isExportEquals) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 221:
-                            var classDeclaration = node;
-                            if (checkModifiers(classDeclaration.modifiers) ||
-                                checkTypeParameters(classDeclaration.typeParameters)) {
-                                return true;
-                            }
-                            break;
-                        case 251:
-                            var heritageClause = node;
-                            if (heritageClause.token === 106) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 222:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 225:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 223:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 147:
-                        case 146:
-                        case 148:
-                        case 149:
-                        case 150:
-                        case 179:
-                        case 220:
-                        case 180:
-                        case 220:
-                            var functionDeclaration = node;
-                            if (checkModifiers(functionDeclaration.modifiers) ||
-                                checkTypeParameters(functionDeclaration.typeParameters) ||
-                                checkTypeAnnotation(functionDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 200:
-                            var variableStatement = node;
-                            if (checkModifiers(variableStatement.modifiers)) {
-                                return true;
-                            }
-                            break;
-                        case 218:
-                            var variableDeclaration = node;
-                            if (checkTypeAnnotation(variableDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 174:
-                        case 175:
-                            var expression = node;
-                            if (expression.typeArguments && expression.typeArguments.length > 0) {
-                                var start_2 = expression.typeArguments.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_2, expression.typeArguments.end - start_2, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 142:
-                            var parameter = node;
-                            if (parameter.modifiers) {
-                                var start_3 = parameter.modifiers.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_3, parameter.modifiers.end - start_3, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            if (parameter.questionToken) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
-                                return true;
-                            }
-                            if (parameter.type) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 145:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.property_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 224:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 177:
-                            var typeAssertionExpression = node;
-                            diagnostics.push(ts.createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 143:
-                            if (!options.experimentalDecorators) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
-                            }
-                            return true;
-                    }
-                    return ts.forEachChild(node, walk);
-                }
-                function checkTypeParameters(typeParameters) {
-                    if (typeParameters) {
-                        var start_4 = typeParameters.pos;
-                        diagnostics.push(ts.createFileDiagnostic(sourceFile, start_4, typeParameters.end - start_4, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
-                        return true;
-                    }
-                    return false;
-                }
-                function checkTypeAnnotation(type) {
-                    if (type) {
-                        diagnostics.push(ts.createDiagnosticForNode(type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                        return true;
-                    }
-                    return false;
-                }
-                function checkModifiers(modifiers) {
-                    if (modifiers) {
-                        for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
-                            var modifier = modifiers_1[_i];
-                            switch (modifier.kind) {
-                                case 112:
-                                case 110:
-                                case 111:
-                                case 128:
-                                case 122:
-                                    diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
-                                    return true;
-                                case 113:
-                                case 82:
-                                case 74:
-                                case 77:
-                                case 115:
-                            }
-                        }
-                    }
-                    return false;
-                }
-            });
-        }
-        function getDeclarationDiagnosticsWorker(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
-                var writeFile = function () { };
-                return ts.getDeclarationDiagnostics(getEmitHost(writeFile), resolver, sourceFile);
-            });
-        }
-        function getDeclarationDiagnosticsForFile(sourceFile, cancellationToken) {
-            return ts.isDeclarationFile(sourceFile) ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
-        }
-        function getOptionsDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, fileProcessingDiagnostics.getGlobalDiagnostics());
-            ts.addRange(allDiagnostics, programDiagnostics.getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function getGlobalDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, getDiagnosticsProducingTypeChecker().getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function hasExtension(fileName) {
-            return ts.getBaseFileName(fileName).indexOf(".") >= 0;
-        }
-        function processRootFile(fileName, isDefaultLib) {
-            processSourceFile(ts.normalizePath(fileName), isDefaultLib, true);
-        }
-        function fileReferenceIsEqualTo(a, b) {
-            return a.fileName === b.fileName;
-        }
-        function moduleNameIsEqualTo(a, b) {
-            return a.text === b.text;
-        }
-        function getTextOfLiteral(literal) {
-            return literal.text;
-        }
-        function collectExternalModuleReferences(file) {
-            if (file.imports) {
-                return;
-            }
-            var isJavaScriptFile = ts.isSourceFileJavaScript(file);
-            var isExternalModuleFile = ts.isExternalModule(file);
-            var imports;
-            var moduleAugmentations;
-            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
-                var node = _a[_i];
-                collectModuleReferences(node, false);
-                if (isJavaScriptFile) {
-                    collectRequireCalls(node);
-                }
-            }
-            file.imports = imports || emptyArray;
-            file.moduleAugmentations = moduleAugmentations || emptyArray;
-            return;
-            function collectModuleReferences(node, inAmbientModule) {
-                switch (node.kind) {
-                    case 230:
-                    case 229:
-                    case 236:
-                        var moduleNameExpr = ts.getExternalModuleName(node);
-                        if (!moduleNameExpr || moduleNameExpr.kind !== 9) {
-                            break;
-                        }
-                        if (!moduleNameExpr.text) {
-                            break;
-                        }
-                        if (!inAmbientModule || !ts.isExternalModuleNameRelative(moduleNameExpr.text)) {
-                            (imports || (imports = [])).push(moduleNameExpr);
-                        }
-                        break;
-                    case 225:
-                        if (ts.isAmbientModule(node) && (inAmbientModule || node.flags & 2 || ts.isDeclarationFile(file))) {
-                            var moduleName = node.name;
-                            if (isExternalModuleFile || (inAmbientModule && !ts.isExternalModuleNameRelative(moduleName.text))) {
-                                (moduleAugmentations || (moduleAugmentations = [])).push(moduleName);
-                            }
-                            else if (!inAmbientModule) {
-                                for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
-                                    var statement = _a[_i];
-                                    collectModuleReferences(statement, true);
-                                }
-                            }
-                        }
-                }
-            }
-            function collectRequireCalls(node) {
-                if (ts.isRequireCall(node, true)) {
-                    (imports || (imports = [])).push(node.arguments[0]);
-                }
-                else {
-                    ts.forEachChild(node, collectRequireCalls);
-                }
-            }
-        }
-        function processSourceFile(fileName, isDefaultLib, isReference, refFile, refPos, refEnd) {
-            var diagnosticArgument;
-            var diagnostic;
-            if (hasExtension(fileName)) {
-                if (!options.allowNonTsExtensions && !ts.forEach(supportedExtensions, function (extension) { return ts.fileExtensionIs(host.getCanonicalFileName(fileName), extension); })) {
-                    diagnostic = ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1;
-                    diagnosticArgument = [fileName, "'" + supportedExtensions.join("', '") + "'"];
-                }
-                else if (!findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd)) {
-                    diagnostic = ts.Diagnostics.File_0_not_found;
-                    diagnosticArgument = [fileName];
-                }
-                else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
-                    diagnostic = ts.Diagnostics.A_file_cannot_have_a_reference_to_itself;
-                    diagnosticArgument = [fileName];
-                }
-            }
-            else {
-                var nonTsFile = options.allowNonTsExtensions && findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd);
-                if (!nonTsFile) {
-                    if (options.allowNonTsExtensions) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        diagnosticArgument = [fileName];
-                    }
-                    else if (!ts.forEach(supportedExtensions, function (extension) { return findSourceFile(fileName + extension, ts.toPath(fileName + extension, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd); })) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        fileName += ".ts";
-                        diagnosticArgument = [fileName];
-                    }
-                }
-            }
-            if (diagnostic) {
-                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
-                    fileProcessingDiagnostics.add(ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(diagnosticArgument)));
-                }
-                else {
-                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(diagnosticArgument)));
-                }
-            }
-        }
-        function reportFileNamesDifferOnlyInCasingError(fileName, existingFileName, refFile, refPos, refEnd) {
-            if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
-                fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
-            }
-            else {
-                fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
-            }
-        }
-        function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) {
-            if (filesByName.contains(path)) {
-                var file_1 = filesByName.get(path);
-                if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
-                    reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
-                }
-                return file_1;
-            }
-            var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
-                if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
-                    fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
-                }
-                else {
-                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
-                }
-            });
-            filesByName.set(path, file);
-            if (file) {
-                file.path = path;
-                if (host.useCaseSensitiveFileNames()) {
-                    var existingFile = filesByNameIgnoreCase.get(path);
-                    if (existingFile) {
-                        reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd);
-                    }
-                    else {
-                        filesByNameIgnoreCase.set(path, file);
-                    }
-                }
-                skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
-                var basePath = ts.getDirectoryPath(fileName);
-                if (!options.noResolve) {
-                    processReferencedFiles(file, basePath, isDefaultLib);
-                    processTypeReferenceDirectives(file);
-                }
-                processImportedModules(file, basePath);
-                if (isDefaultLib) {
-                    files.unshift(file);
-                }
-                else {
-                    files.push(file);
-                }
-            }
-            return file;
-        }
-        function processReferencedFiles(file, basePath, isDefaultLib) {
-            ts.forEach(file.referencedFiles, function (ref) {
-                var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
-                processSourceFile(referencedFileName, isDefaultLib, true, file, ref.pos, ref.end);
-            });
-        }
-        function processTypeReferenceDirectives(file) {
-            var typeDirectives = ts.map(file.typeReferenceDirectives, function (l) { return l.fileName; });
-            var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeDirectives, file.fileName);
-            for (var i = 0; i < typeDirectives.length; i++) {
-                var ref = file.typeReferenceDirectives[i];
-                var resolvedTypeReferenceDirective = resolutions[i];
-                ts.setResolvedTypeReferenceDirective(file, ref.fileName, resolvedTypeReferenceDirective);
-                processTypeReferenceDirective(ref.fileName, resolvedTypeReferenceDirective, file, ref.pos, ref.end);
-            }
-        }
-        function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
-            var previousResolution = resolvedTypeReferenceDirectives[typeReferenceDirective];
-            if (previousResolution && previousResolution.primary) {
-                return;
-            }
-            var saveResolution = true;
-            if (resolvedTypeReferenceDirective) {
-                if (resolvedTypeReferenceDirective.primary) {
-                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, true, refFile, refPos, refEnd);
-                }
-                else {
-                    if (previousResolution) {
-                        var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
-                        if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
-                            fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
-                        }
-                        saveResolution = false;
-                    }
-                    else {
-                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, true, refFile, refPos, refEnd);
-                    }
-                }
-            }
-            else {
-                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_name_0, typeReferenceDirective));
-            }
-            if (saveResolution) {
-                resolvedTypeReferenceDirectives[typeReferenceDirective] = resolvedTypeReferenceDirective;
-            }
-        }
-        function createDiagnostic(refFile, refPos, refEnd, message) {
-            var args = [];
-            for (var _i = 4; _i < arguments.length; _i++) {
-                args[_i - 4] = arguments[_i];
-            }
-            if (refFile === undefined || refPos === undefined || refEnd === undefined) {
-                return ts.createCompilerDiagnostic.apply(void 0, [message].concat(args));
-            }
-            else {
-                return ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, message].concat(args));
-            }
-        }
-        function getCanonicalFileName(fileName) {
-            return host.getCanonicalFileName(fileName);
-        }
-        function processImportedModules(file, basePath) {
-            collectExternalModuleReferences(file);
-            if (file.imports.length || file.moduleAugmentations.length) {
-                file.resolvedModules = {};
-                var moduleNames = ts.map(ts.concatenate(file.imports, file.moduleAugmentations), getTextOfLiteral);
-                var resolutions = resolveModuleNamesWorker(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory));
-                for (var i = 0; i < moduleNames.length; i++) {
-                    var resolution = resolutions[i];
-                    ts.setResolvedModule(file, moduleNames[i], resolution);
-                    var shouldAddFile = resolution &&
-                        !options.noResolve &&
-                        i < file.imports.length;
-                    if (shouldAddFile) {
-                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), false, false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
-                    }
-                }
-            }
-            else {
-                file.resolvedModules = undefined;
-            }
-            return;
-        }
-        function computeCommonSourceDirectory(sourceFiles) {
-            var fileNames = [];
-            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
-                var file = sourceFiles_2[_i];
-                if (!file.isDeclarationFile) {
-                    fileNames.push(file.fileName);
-                }
-            }
-            return computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName);
-        }
-        function checkSourceFilesBelongToPath(sourceFiles, rootDirectory) {
-            var allFilesBelongToPath = true;
-            if (sourceFiles) {
-                var absoluteRootDirectoryPath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(rootDirectory, currentDirectory));
-                for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
-                    var sourceFile = sourceFiles_3[_i];
-                    if (!ts.isDeclarationFile(sourceFile)) {
-                        var absoluteSourceFilePath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
-                        if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
-                            programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
-                            allFilesBelongToPath = false;
-                        }
-                    }
-                }
-            }
-            return allFilesBelongToPath;
-        }
-        function verifyCompilerOptions() {
-            if (options.isolatedModules) {
-                if (options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules"));
-                }
-                if (options.noEmitOnError) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules"));
-                }
-                if (options.out) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules"));
-                }
-                if (options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules"));
-                }
-            }
-            if (options.inlineSourceMap) {
-                if (options.sourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap"));
-                }
-                if (options.mapRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap"));
-                }
-            }
-            if (options.paths && options.baseUrl === undefined) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option));
-            }
-            if (options.paths) {
-                for (var key in options.paths) {
-                    if (!ts.hasProperty(options.paths, key)) {
-                        continue;
-                    }
-                    if (!hasZeroOrOneAsteriskCharacter(key)) {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key));
-                    }
-                    if (ts.isArray(options.paths[key])) {
-                        for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
-                            var subst = _a[_i];
-                            var typeOfSubst = typeof subst;
-                            if (typeOfSubst === "string") {
-                                if (!hasZeroOrOneAsteriskCharacter(subst)) {
-                                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key));
-                                }
-                            }
-                            else {
-                                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst));
-                            }
-                        }
-                    }
-                    else {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
-                    }
-                }
-            }
-            if (options.inlineSources) {
-                if (!options.sourceMap && !options.inlineSourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided));
-                }
-                if (options.sourceRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceRoot", "inlineSources"));
-                }
-            }
-            if (options.out && options.outFile) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
-            }
-            if (!options.sourceMap && (options.mapRoot || options.sourceRoot)) {
-                if (options.mapRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
-                }
-                if (options.sourceRoot && !options.inlineSourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "sourceRoot", "sourceMap"));
-                }
-            }
-            if (options.declarationDir) {
-                if (!options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration"));
-                }
-                if (options.out || options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile"));
-                }
-            }
-            if (options.lib && options.noLib) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib"));
-            }
-            var languageVersion = options.target || 0;
-            var outFile = options.outFile || options.out;
-            var firstExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) ? f : undefined; });
-            if (options.isolatedModules) {
-                if (options.module === ts.ModuleKind.None && languageVersion < 2) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
-                }
-                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
-                if (firstNonExternalModuleSourceFile) {
-                    var span = ts.getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
-                    programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
-                }
-            }
-            else if (firstExternalModuleSourceFile && languageVersion < 2 && options.module === ts.ModuleKind.None) {
-                var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
-            }
-            if (options.module === ts.ModuleKind.ES6 && languageVersion < 2) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
-            }
-            if (outFile) {
-                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
-                }
-                else if (options.module === undefined && firstExternalModuleSourceFile) {
-                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
-                }
-            }
-            if (options.outDir ||
-                options.sourceRoot ||
-                options.mapRoot) {
-                var dir = getCommonSourceDirectory();
-                if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files));
-                }
-            }
-            if (!options.noEmit && options.allowJs && options.declaration) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration"));
-            }
-            if (options.emitDecoratorMetadata &&
-                !options.experimentalDecorators) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators"));
-            }
-            if (options.reactNamespace && !ts.isIdentifier(options.reactNamespace, languageVersion)) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace));
-            }
-            if (!options.noEmit && !options.suppressOutputPathCheck) {
-                var emitHost = getEmitHost();
-                var emitFilesSeen_1 = ts.createFileMap(!host.useCaseSensitiveFileNames() ? function (key) { return key.toLocaleLowerCase(); } : undefined);
-                ts.forEachExpectedEmitFile(emitHost, function (emitFileNames, sourceFiles, isBundledEmit) {
-                    verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen_1);
-                    verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
-                });
-            }
-            function verifyEmitFilePath(emitFileName, emitFilesSeen) {
-                if (emitFileName) {
-                    var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName);
-                    if (filesByName.contains(emitFilePath)) {
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file);
-                    }
-                    if (emitFilesSeen.contains(emitFilePath)) {
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files);
-                    }
-                    else {
-                        emitFilesSeen.set(emitFilePath, true);
-                    }
-                }
-            }
-        }
-        function createEmitBlockingDiagnostics(emitFileName, emitFilePath, message) {
-            hasEmitBlockingDiagnostics.set(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName), true);
-            programDiagnostics.add(ts.createCompilerDiagnostic(message, emitFileName));
-        }
-    }
-    ts.createProgram = createProgram;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.optionDeclarations = [
-        {
-            name: "charset",
-            type: "string"
-        },
-        {
-            name: "declaration",
-            shortName: "d",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_d_ts_file
-        },
-        {
-            name: "declarationDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "diagnostics",
-            type: "boolean"
-        },
-        {
-            name: "emitBOM",
-            type: "boolean"
-        },
-        {
-            name: "help",
-            shortName: "h",
-            type: "boolean",
-            description: ts.Diagnostics.Print_this_message
-        },
-        {
-            name: "help",
-            shortName: "?",
-            type: "boolean"
-        },
-        {
-            name: "init",
-            type: "boolean",
-            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file
-        },
-        {
-            name: "inlineSourceMap",
-            type: "boolean"
-        },
-        {
-            name: "inlineSources",
-            type: "boolean"
-        },
-        {
-            name: "jsx",
-            type: {
-                "preserve": 1,
-                "react": 2
-            },
-            paramType: ts.Diagnostics.KIND,
-            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_or_react
-        },
-        {
-            name: "reactNamespace",
-            type: "string",
-            description: ts.Diagnostics.Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit
-        },
-        {
-            name: "listFiles",
-            type: "boolean"
-        },
-        {
-            name: "locale",
-            type: "string"
-        },
-        {
-            name: "mapRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
-            paramType: ts.Diagnostics.LOCATION
-        },
-        {
-            name: "module",
-            shortName: "m",
-            type: {
-                "none": ts.ModuleKind.None,
-                "commonjs": ts.ModuleKind.CommonJS,
-                "amd": ts.ModuleKind.AMD,
-                "system": ts.ModuleKind.System,
-                "umd": ts.ModuleKind.UMD,
-                "es6": ts.ModuleKind.ES6,
-                "es2015": ts.ModuleKind.ES2015
-            },
-            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
-            paramType: ts.Diagnostics.KIND
-        },
-        {
-            name: "newLine",
-            type: {
-                "crlf": 0,
-                "lf": 1
-            },
-            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
-            paramType: ts.Diagnostics.NEWLINE
-        },
-        {
-            name: "noEmit",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs
-        },
-        {
-            name: "noEmitHelpers",
-            type: "boolean"
-        },
-        {
-            name: "noEmitOnError",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported
-        },
-        {
-            name: "noImplicitAny",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type
-        },
-        {
-            name: "noImplicitThis",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type
-        },
-        {
-            name: "noLib",
-            type: "boolean"
-        },
-        {
-            name: "noResolve",
-            type: "boolean"
-        },
-        {
-            name: "skipDefaultLibCheck",
-            type: "boolean"
-        },
-        {
-            name: "skipLibCheck",
-            type: "boolean",
-            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
-        },
-        {
-            name: "out",
-            type: "string",
-            isFilePath: false,
-            paramType: ts.Diagnostics.FILE
-        },
-        {
-            name: "outFile",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
-            paramType: ts.Diagnostics.FILE
-        },
-        {
-            name: "outDir",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "preserveConstEnums",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
-        },
-        {
-            name: "pretty",
-            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental,
-            type: "boolean"
-        },
-        {
-            name: "project",
-            shortName: "p",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Compile_the_project_in_the_given_directory,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "removeComments",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_comments_to_output
-        },
-        {
-            name: "rootDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.LOCATION,
-            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir
-        },
-        {
-            name: "isolatedModules",
-            type: "boolean"
-        },
-        {
-            name: "sourceMap",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_map_file
-        },
-        {
-            name: "sourceRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
-            paramType: ts.Diagnostics.LOCATION
-        },
-        {
-            name: "suppressExcessPropertyErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
-            experimental: true
-        },
-        {
-            name: "suppressImplicitAnyIndexErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures
-        },
-        {
-            name: "stripInternal",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
-            experimental: true
-        },
-        {
-            name: "target",
-            shortName: "t",
-            type: {
-                "es3": 0,
-                "es5": 1,
-                "es6": 2,
-                "es2015": 2
-            },
-            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
-            paramType: ts.Diagnostics.VERSION
-        },
-        {
-            name: "version",
-            shortName: "v",
-            type: "boolean",
-            description: ts.Diagnostics.Print_the_compiler_s_version
-        },
-        {
-            name: "watch",
-            shortName: "w",
-            type: "boolean",
-            description: ts.Diagnostics.Watch_input_files
-        },
-        {
-            name: "experimentalDecorators",
-            type: "boolean",
-            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
-        },
-        {
-            name: "emitDecoratorMetadata",
-            type: "boolean",
-            experimental: true,
-            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
-        },
-        {
-            name: "moduleResolution",
-            type: {
-                "node": ts.ModuleResolutionKind.NodeJs,
-                "classic": ts.ModuleResolutionKind.Classic
-            },
-            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6
-        },
-        {
-            name: "allowUnusedLabels",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
-        },
-        {
-            name: "noImplicitReturns",
-            type: "boolean",
-            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
-        },
-        {
-            name: "noFallthroughCasesInSwitch",
-            type: "boolean",
-            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
-        },
-        {
-            name: "allowUnreachableCode",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
-        },
-        {
-            name: "forceConsistentCasingInFileNames",
-            type: "boolean",
-            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
-        },
-        {
-            name: "baseUrl",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
-        },
-        {
-            name: "paths",
-            type: "object",
-            isTSConfigOnly: true
-        },
-        {
-            name: "rootDirs",
-            type: "list",
-            isTSConfigOnly: true,
-            element: {
-                name: "rootDirs",
-                type: "string",
-                isFilePath: true
-            }
-        },
-        {
-            name: "typesSearchPaths",
-            type: "list",
-            isTSConfigOnly: true,
-            element: {
-                name: "typesSearchPaths",
-                type: "string",
-                isFilePath: true
-            }
-        },
-        {
-            name: "typesRoot",
-            type: "string"
-        },
-        {
-            name: "types",
-            type: "list",
-            element: {
-                name: "types",
-                type: "string"
-            },
-            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
-        },
-        {
-            name: "traceResolution",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
-        },
-        {
-            name: "allowJs",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
-        },
-        {
-            name: "allowSyntheticDefaultImports",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
-        },
-        {
-            name: "noImplicitUseStrict",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
-        },
-        {
-            name: "listEmittedFiles",
-            type: "boolean"
-        },
-        {
-            name: "lib",
-            type: "list",
-            element: {
-                name: "lib",
-                type: {
-                    "es5": "lib.es5.d.ts",
-                    "es6": "lib.es2015.d.ts",
-                    "es2015": "lib.es2015.d.ts",
-                    "es7": "lib.es2016.d.ts",
-                    "es2016": "lib.es2016.d.ts",
-                    "es2017": "lib.es2017.d.ts",
-                    "dom": "lib.dom.d.ts",
-                    "webworker": "lib.webworker.d.ts",
-                    "scripthost": "lib.scripthost.d.ts",
-                    "es2015.core": "lib.es2015.core.d.ts",
-                    "es2015.collection": "lib.es2015.collection.d.ts",
-                    "es2015.generator": "lib.es2015.generator.d.ts",
-                    "es2015.iterable": "lib.es2015.iterable.d.ts",
-                    "es2015.promise": "lib.es2015.promise.d.ts",
-                    "es2015.proxy": "lib.es2015.proxy.d.ts",
-                    "es2015.reflect": "lib.es2015.reflect.d.ts",
-                    "es2015.symbol": "lib.es2015.symbol.d.ts",
-                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
-                    "es2016.array.include": "lib.es2016.array.include.d.ts",
-                    "es2017.object": "lib.es2017.object.d.ts"
-                }
-            },
-            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
-        },
-        {
-            name: "strictNullChecks",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_strict_null_checks
-        }
-    ];
-    ts.typingOptionDeclarations = [
-        {
-            name: "enableAutoDiscovery",
-            type: "boolean"
-        },
-        {
-            name: "include",
-            type: "list",
-            element: {
-                name: "include",
-                type: "string"
-            }
-        },
-        {
-            name: "exclude",
-            type: "list",
-            element: {
-                name: "exclude",
-                type: "string"
-            }
-        }
-    ];
-    var optionNameMapCache;
-    function getOptionNameMap() {
-        if (optionNameMapCache) {
-            return optionNameMapCache;
-        }
-        var optionNameMap = {};
-        var shortOptionNames = {};
-        ts.forEach(ts.optionDeclarations, function (option) {
-            optionNameMap[option.name.toLowerCase()] = option;
-            if (option.shortName) {
-                shortOptionNames[option.shortName] = option.name;
-            }
-        });
-        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
-        return optionNameMapCache;
-    }
-    ts.getOptionNameMap = getOptionNameMap;
-    function createCompilerDiagnosticForInvalidCustomType(opt) {
-        var namesOfType = [];
-        ts.forEachKey(opt.type, function (key) {
-            namesOfType.push(" '" + key + "'");
-        });
-        return ts.createCompilerDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
-    }
-    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
-    function parseCustomTypeOption(opt, value, errors) {
-        var key = trimString((value || "")).toLowerCase();
-        var map = opt.type;
-        if (ts.hasProperty(map, key)) {
-            return map[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
-    }
-    ts.parseCustomTypeOption = parseCustomTypeOption;
-    function parseListTypeOption(opt, value, errors) {
-        var values = trimString((value || "")).split(",");
-        switch (opt.element.type) {
-            case "number":
-                return ts.map(values, parseInt);
-            case "string":
-                return ts.map(values, function (v) { return v || ""; });
-            default:
-                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
-        }
-    }
-    ts.parseListTypeOption = parseListTypeOption;
-    function parseCommandLine(commandLine, readFile) {
-        var options = {};
-        var fileNames = [];
-        var errors = [];
-        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
-        parseStrings(commandLine);
-        return {
-            options: options,
-            fileNames: fileNames,
-            errors: errors
-        };
-        function parseStrings(args) {
-            var i = 0;
-            while (i < args.length) {
-                var s = args[i];
-                i++;
-                if (s.charCodeAt(0) === 64) {
-                    parseResponseFile(s.slice(1));
-                }
-                else if (s.charCodeAt(0) === 45) {
-                    s = s.slice(s.charCodeAt(1) === 45 ? 2 : 1).toLowerCase();
-                    if (ts.hasProperty(shortOptionNames, s)) {
-                        s = shortOptionNames[s];
-                    }
-                    if (ts.hasProperty(optionNameMap, s)) {
-                        var opt = optionNameMap[s];
-                        if (opt.isTSConfigOnly) {
-                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
-                        }
-                        else {
-                            if (!args[i] && opt.type !== "boolean") {
-                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
-                            }
-                            switch (opt.type) {
-                                case "number":
-                                    options[opt.name] = parseInt(args[i]);
-                                    i++;
-                                    break;
-                                case "boolean":
-                                    options[opt.name] = true;
-                                    break;
-                                case "string":
-                                    options[opt.name] = args[i] || "";
-                                    i++;
-                                    break;
-                                case "list":
-                                    options[opt.name] = parseListTypeOption(opt, args[i], errors);
-                                    i++;
-                                    break;
-                                default:
-                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
-                                    i++;
-                                    break;
-                            }
-                        }
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
-                    }
-                }
-                else {
-                    fileNames.push(s);
-                }
-            }
-        }
-        function parseResponseFile(fileName) {
-            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
-            if (!text) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
-                return;
-            }
-            var args = [];
-            var pos = 0;
-            while (true) {
-                while (pos < text.length && text.charCodeAt(pos) <= 32)
-                    pos++;
-                if (pos >= text.length)
-                    break;
-                var start = pos;
-                if (text.charCodeAt(start) === 34) {
-                    pos++;
-                    while (pos < text.length && text.charCodeAt(pos) !== 34)
-                        pos++;
-                    if (pos < text.length) {
-                        args.push(text.substring(start + 1, pos));
-                        pos++;
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
-                    }
-                }
-                else {
-                    while (text.charCodeAt(pos) > 32)
-                        pos++;
-                    args.push(text.substring(start, pos));
-                }
-            }
-            parseStrings(args);
-        }
-    }
-    ts.parseCommandLine = parseCommandLine;
-    function readConfigFile(fileName, readFile) {
-        var text = "";
-        try {
-            text = readFile(fileName);
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
-        }
-        return parseConfigFileTextToJson(fileName, text);
-    }
-    ts.readConfigFile = readConfigFile;
-    function parseConfigFileTextToJson(fileName, jsonText) {
-        try {
-            var jsonTextWithoutComments = removeComments(jsonText);
-            return { config: /\S/.test(jsonTextWithoutComments) ? JSON.parse(jsonTextWithoutComments) : {} };
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) };
-        }
-    }
-    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
-    function removeComments(jsonText) {
-        var output = "";
-        var scanner = ts.createScanner(1, false, 0, jsonText);
-        var token;
-        while ((token = scanner.scan()) !== 1) {
-            switch (token) {
-                case 2:
-                case 3:
-                    output += scanner.getTokenText().replace(/\S/g, " ");
-                    break;
-                default:
-                    output += scanner.getTokenText();
-                    break;
-            }
-        }
-        return output;
-    }
-    var IgnoreFileNamePattern = /(\.min\.js$)|([\\/]\.[\w.])/;
-    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName) {
-        if (existingOptions === void 0) { existingOptions = {}; }
-        var errors = [];
-        var compilerOptions = convertCompilerOptionsFromJsonWorker(json["compilerOptions"], basePath, errors, configFileName);
-        var options = ts.extend(existingOptions, compilerOptions);
-        var typingOptions = convertTypingOptionsFromJsonWorker(json["typingOptions"], basePath, errors, configFileName);
-        options.configFilePath = configFileName;
-        var fileNames = getFileNames(errors);
-        return {
-            options: options,
-            fileNames: fileNames,
-            typingOptions: typingOptions,
-            raw: json,
-            errors: errors
-        };
-        function getFileNames(errors) {
-            var fileNames = [];
-            if (ts.hasProperty(json, "files")) {
-                if (ts.isArray(json["files"])) {
-                    fileNames = ts.map(json["files"], function (s) { return ts.combinePaths(basePath, s); });
-                }
-                else {
-                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
-                }
-            }
-            else {
-                var filesSeen = {};
-                var exclude = [];
-                if (ts.isArray(json["exclude"])) {
-                    exclude = json["exclude"];
-                }
-                else {
-                    exclude = ["node_modules", "bower_components", "jspm_packages"];
-                }
-                var outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
-                if (outDir) {
-                    exclude.push(outDir);
-                }
-                exclude = ts.map(exclude, ts.normalizeSlashes);
-                var supportedExtensions = ts.getSupportedExtensions(options);
-                ts.Debug.assert(ts.indexOf(supportedExtensions, ".ts") < ts.indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
-                for (var _i = 0, supportedExtensions_1 = supportedExtensions; _i < supportedExtensions_1.length; _i++) {
-                    var extension = supportedExtensions_1[_i];
-                    var filesInDirWithExtension = host.readDirectory(basePath, extension, exclude);
-                    for (var _a = 0, filesInDirWithExtension_1 = filesInDirWithExtension; _a < filesInDirWithExtension_1.length; _a++) {
-                        var fileName = filesInDirWithExtension_1[_a];
-                        if (extension === ".ts" && ts.fileExtensionIs(fileName, ".d.ts")) {
-                            continue;
-                        }
-                        if (IgnoreFileNamePattern.test(fileName)) {
-                            continue;
-                        }
-                        if (extension === ".d.ts" || (options.allowJs && ts.contains(ts.supportedJavascriptExtensions, extension))) {
-                            var baseName = fileName.substr(0, fileName.length - extension.length);
-                            if (ts.hasProperty(filesSeen, baseName + ".ts") || ts.hasProperty(filesSeen, baseName + ".tsx")) {
-                                continue;
-                            }
-                        }
-                        filesSeen[fileName] = true;
-                        fileNames.push(fileName);
-                    }
-                }
-            }
-            if (ts.hasProperty(json, "excludes") && !ts.hasProperty(json, "exclude")) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
-            }
-            return fileNames;
-        }
-    }
-    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
-    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
-    }
-    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
-    function convertTypingOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
-    }
-    ts.convertTypingOptionsFromJson = convertTypingOptionsFromJson;
-    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json" ? { allowJs: true } : {};
-        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
-        return options;
-    }
-    function convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
-            ? { enableAutoDiscovery: true, include: [], exclude: [] }
-            : { enableAutoDiscovery: false, include: [], exclude: [] };
-        convertOptionsFromJson(ts.typingOptionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_typing_option_0, errors);
-        return options;
-    }
-    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
-        if (!jsonOptions) {
-            return;
-        }
-        var optionNameMap = ts.arrayToMap(optionDeclarations, function (opt) { return opt.name; });
-        for (var id in jsonOptions) {
-            if (ts.hasProperty(optionNameMap, id)) {
-                var opt = optionNameMap[id];
-                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
-            }
-            else {
-                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
-            }
-        }
-    }
-    function convertJsonOption(opt, value, basePath, errors) {
-        var optType = opt.type;
-        var expectedType = typeof optType === "string" ? optType : "string";
-        if (optType === "list" && ts.isArray(value)) {
-            return convertJsonOptionOfListType(opt, value, basePath, errors);
-        }
-        else if (typeof value === expectedType) {
-            if (typeof optType !== "string") {
-                return convertJsonOptionOfCustomType(opt, value, errors);
-            }
-            else {
-                if (opt.isFilePath) {
-                    value = ts.normalizePath(ts.combinePaths(basePath, value));
-                    if (value === "") {
-                        value = ".";
-                    }
-                }
-            }
-            return value;
-        }
-        else {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, expectedType));
-        }
-    }
-    function convertJsonOptionOfCustomType(opt, value, errors) {
-        var key = value.toLowerCase();
-        if (ts.hasProperty(opt.type, key)) {
-            return opt.type[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
-    }
-    function convertJsonOptionOfListType(option, values, basePath, errors) {
-        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
-    }
-    function trimString(s) {
-        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
-    }
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var reportDiagnostic = reportDiagnosticSimply;
-    function reportDiagnostics(diagnostics, host) {
-        for (var _i = 0, diagnostics_1 = diagnostics; _i < diagnostics_1.length; _i++) {
-            var diagnostic = diagnostics_1[_i];
-            reportDiagnostic(diagnostic, host);
-        }
-    }
-    function reportEmittedFiles(files, host) {
-        if (!files || files.length == 0) {
-            return;
-        }
-        var currentDir = ts.sys.getCurrentDirectory();
-        for (var _i = 0, files_4 = files; _i < files_4.length; _i++) {
-            var file = files_4[_i];
-            var filepath = ts.getNormalizedAbsolutePath(file, currentDir);
-            ts.sys.write("TSFILE: " + filepath + ts.sys.newLine);
-        }
-    }
-    function validateLocaleAndSetLanguage(locale, errors) {
-        var matchResult = /^([a-z]+)([_\-]([a-z]+))?$/.exec(locale.toLowerCase());
-        if (!matchResult) {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1, "en", "ja-jp"));
-            return false;
-        }
-        var language = matchResult[1];
-        var territory = matchResult[3];
-        if (!trySetLanguageAndTerritory(language, territory, errors)) {
-            trySetLanguageAndTerritory(language, undefined, errors);
-        }
-        return true;
-    }
-    function trySetLanguageAndTerritory(language, territory, errors) {
-        var compilerFilePath = ts.normalizePath(ts.sys.getExecutingFilePath());
-        var containingDirectoryPath = ts.getDirectoryPath(compilerFilePath);
-        var filePath = ts.combinePaths(containingDirectoryPath, language);
-        if (territory) {
-            filePath = filePath + "-" + territory;
-        }
-        filePath = ts.sys.resolvePath(ts.combinePaths(filePath, "diagnosticMessages.generated.json"));
-        if (!ts.sys.fileExists(filePath)) {
-            return false;
-        }
-        var fileContents = "";
-        try {
-            fileContents = ts.sys.readFile(filePath);
-        }
-        catch (e) {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unable_to_open_file_0, filePath));
-            return false;
-        }
-        try {
-            ts.localizedDiagnosticMessages = JSON.parse(fileContents);
-        }
-        catch (e) {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Corrupted_locale_file_0, filePath));
-            return false;
-        }
-        return true;
-    }
-    function countLines(program) {
-        var count = 0;
-        ts.forEach(program.getSourceFiles(), function (file) {
-            count += ts.getLineStarts(file).length;
-        });
-        return count;
-    }
-    function getDiagnosticText(message) {
-        var args = [];
-        for (var _i = 1; _i < arguments.length; _i++) {
-            args[_i - 1] = arguments[_i];
-        }
-        var diagnostic = ts.createCompilerDiagnostic.apply(undefined, arguments);
-        return diagnostic.messageText;
-    }
-    function getRelativeFileName(fileName, host) {
-        return host ? ts.convertToRelativePath(fileName, host.getCurrentDirectory(), function (fileName) { return host.getCanonicalFileName(fileName); }) : fileName;
-    }
-    function reportDiagnosticSimply(diagnostic, host) {
-        var output = "";
-        if (diagnostic.file) {
-            var _a = ts.getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start), line = _a.line, character = _a.character;
-            var relativeFileName = getRelativeFileName(diagnostic.file.fileName, host);
-            output += relativeFileName + "(" + (line + 1) + "," + (character + 1) + "): ";
-        }
-        var category = ts.DiagnosticCategory[diagnostic.category].toLowerCase();
-        output += category + " TS" + diagnostic.code + ": " + ts.flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine) + ts.sys.newLine;
-        ts.sys.write(output);
-    }
-    var redForegroundEscapeSequence = "\u001b[91m";
-    var yellowForegroundEscapeSequence = "\u001b[93m";
-    var blueForegroundEscapeSequence = "\u001b[93m";
-    var gutterStyleSequence = "\u001b[100;30m";
-    var gutterSeparator = " ";
-    var resetEscapeSequence = "\u001b[0m";
-    var ellipsis = "...";
-    var categoryFormatMap = (_a = {},
-        _a[ts.DiagnosticCategory.Warning] = yellowForegroundEscapeSequence,
-        _a[ts.DiagnosticCategory.Error] = redForegroundEscapeSequence,
-        _a[ts.DiagnosticCategory.Message] = blueForegroundEscapeSequence,
-        _a
-    );
-    function formatAndReset(text, formatStyle) {
-        return formatStyle + text + resetEscapeSequence;
-    }
-    function reportDiagnosticWithColorAndContext(diagnostic, host) {
-        var output = "";
-        if (diagnostic.file) {
-            var start = diagnostic.start, length_3 = diagnostic.length, file = diagnostic.file;
-            var _a = ts.getLineAndCharacterOfPosition(file, start), firstLine = _a.line, firstLineChar = _a.character;
-            var _b = ts.getLineAndCharacterOfPosition(file, start + length_3), lastLine = _b.line, lastLineChar = _b.character;
-            var lastLineInFile = ts.getLineAndCharacterOfPosition(file, file.text.length).line;
-            var relativeFileName = getRelativeFileName(file.fileName, host);
-            var hasMoreThanFiveLines = (lastLine - firstLine) >= 4;
-            var gutterWidth = (lastLine + 1 + "").length;
-            if (hasMoreThanFiveLines) {
-                gutterWidth = Math.max(ellipsis.length, gutterWidth);
-            }
-            output += ts.sys.newLine;
-            for (var i = firstLine; i <= lastLine; i++) {
-                if (hasMoreThanFiveLines && firstLine + 1 < i && i < lastLine - 1) {
-                    output += formatAndReset(padLeft(ellipsis, gutterWidth), gutterStyleSequence) + gutterSeparator + ts.sys.newLine;
-                    i = lastLine - 1;
-                }
-                var lineStart = ts.getPositionOfLineAndCharacter(file, i, 0);
-                var lineEnd = i < lastLineInFile ? ts.getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
-                var lineContent = file.text.slice(lineStart, lineEnd);
-                lineContent = lineContent.replace(/\s+$/g, "");
-                lineContent = lineContent.replace("\t", " ");
-                output += formatAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
-                output += lineContent + ts.sys.newLine;
-                output += formatAndReset(padLeft("", gutterWidth), gutterStyleSequence) + gutterSeparator;
-                output += redForegroundEscapeSequence;
-                if (i === firstLine) {
-                    var lastCharForLine = i === lastLine ? lastLineChar : undefined;
-                    output += lineContent.slice(0, firstLineChar).replace(/\S/g, " ");
-                    output += lineContent.slice(firstLineChar, lastCharForLine).replace(/./g, "~");
-                }
-                else if (i === lastLine) {
-                    output += lineContent.slice(0, lastLineChar).replace(/./g, "~");
-                }
-                else {
-                    output += lineContent.replace(/./g, "~");
-                }
-                output += resetEscapeSequence;
-                output += ts.sys.newLine;
-            }
-            output += ts.sys.newLine;
-            output += relativeFileName + "(" + (firstLine + 1) + "," + (firstLineChar + 1) + "): ";
-        }
-        var categoryColor = categoryFormatMap[diagnostic.category];
-        var category = ts.DiagnosticCategory[diagnostic.category].toLowerCase();
-        output += formatAndReset(category, categoryColor) + " TS" + diagnostic.code + ": " + ts.flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine);
-        output += ts.sys.newLine + ts.sys.newLine;
-        ts.sys.write(output);
-    }
-    function reportWatchDiagnostic(diagnostic) {
-        var output = new Date().toLocaleTimeString() + " - ";
-        if (diagnostic.file) {
-            var loc = ts.getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start);
-            output += diagnostic.file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + "): ";
-        }
-        output += "" + ts.flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine) + ts.sys.newLine;
-        ts.sys.write(output);
-    }
-    function padLeft(s, length) {
-        while (s.length < length) {
-            s = " " + s;
-        }
-        return s;
-    }
-    function padRight(s, length) {
-        while (s.length < length) {
-            s = s + " ";
-        }
-        return s;
-    }
-    function reportStatisticalValue(name, value) {
-        ts.sys.write(padRight(name + ":", 12) + padLeft(value.toString(), 10) + ts.sys.newLine);
-    }
-    function reportCountStatistic(name, count) {
-        reportStatisticalValue(name, "" + count);
-    }
-    function reportTimeStatistic(name, time) {
-        reportStatisticalValue(name, (time / 1000).toFixed(2) + "s");
-    }
-    function isJSONSupported() {
-        return typeof JSON === "object" && typeof JSON.parse === "function";
-    }
-    function executeCommandLine(args) {
-        var commandLine = ts.parseCommandLine(args);
-        var configFileName;
-        var cachedConfigFileText;
-        var configFileWatcher;
-        var directoryWatcher;
-        var cachedProgram;
-        var rootFileNames;
-        var compilerOptions;
-        var compilerHost;
-        var hostGetSourceFile;
-        var timerHandleForRecompilation;
-        var timerHandleForDirectoryChanges;
-        var cachedExistingFiles;
-        var hostFileExists;
-        if (commandLine.options.locale) {
-            if (!isJSONSupported()) {
-                reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_current_host_does_not_support_the_0_option, "--locale"), undefined);
-                return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-            }
-            validateLocaleAndSetLanguage(commandLine.options.locale, commandLine.errors);
-        }
-        if (commandLine.errors.length > 0) {
-            reportDiagnostics(commandLine.errors, compilerHost);
-            return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-        }
-        if (commandLine.options.init) {
-            writeConfigFile(commandLine.options, commandLine.fileNames);
-            return ts.sys.exit(ts.ExitStatus.Success);
-        }
-        if (commandLine.options.version) {
-            printVersion();
-            return ts.sys.exit(ts.ExitStatus.Success);
-        }
-        if (commandLine.options.help) {
-            printVersion();
-            printHelp();
-            return ts.sys.exit(ts.ExitStatus.Success);
-        }
-        if (commandLine.options.project) {
-            if (!isJSONSupported()) {
-                reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_current_host_does_not_support_the_0_option, "--project"), undefined);
-                return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-            }
-            if (commandLine.fileNames.length !== 0) {
-                reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.Option_project_cannot_be_mixed_with_source_files_on_a_command_line), undefined);
-                return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-            }
-            var fileOrDirectory = ts.normalizePath(commandLine.options.project);
-            if (!fileOrDirectory || ts.sys.directoryExists(fileOrDirectory)) {
-                configFileName = ts.combinePaths(fileOrDirectory, "tsconfig.json");
-                if (!ts.sys.fileExists(configFileName)) {
-                    reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0, commandLine.options.project), undefined);
-                    return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-                }
-            }
-            else {
-                configFileName = fileOrDirectory;
-                if (!ts.sys.fileExists(configFileName)) {
-                    reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_specified_path_does_not_exist_Colon_0, commandLine.options.project), undefined);
-                    return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-                }
-            }
-        }
-        else if (commandLine.fileNames.length === 0 && isJSONSupported()) {
-            var searchPath = ts.normalizePath(ts.sys.getCurrentDirectory());
-            configFileName = ts.findConfigFile(searchPath, ts.sys.fileExists);
-        }
-        if (commandLine.fileNames.length === 0 && !configFileName) {
-            printVersion();
-            printHelp();
-            return ts.sys.exit(ts.ExitStatus.Success);
-        }
-        if (ts.isWatchSet(commandLine.options)) {
-            if (!ts.sys.watchFile) {
-                reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_current_host_does_not_support_the_0_option, "--watch"), undefined);
-                return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-            }
-            if (configFileName) {
-                configFileWatcher = ts.sys.watchFile(configFileName, configFileChanged);
-            }
-            if (ts.sys.watchDirectory && configFileName) {
-                var directory = ts.getDirectoryPath(configFileName);
-                directoryWatcher = ts.sys.watchDirectory(directory == "" ? "." : directory, watchedDirectoryChanged, true);
-            }
-        }
-        performCompilation();
-        function parseConfigFile() {
-            if (!cachedConfigFileText) {
-                try {
-                    cachedConfigFileText = ts.sys.readFile(configFileName);
-                }
-                catch (e) {
-                    var error = ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, configFileName, e.message);
-                    reportWatchDiagnostic(error);
-                    ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-                    return;
-                }
-            }
-            if (!cachedConfigFileText) {
-                var error = ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, configFileName);
-                reportDiagnostics([error], undefined);
-                ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-                return;
-            }
-            var result = ts.parseConfigFileTextToJson(configFileName, cachedConfigFileText);
-            var configObject = result.config;
-            if (!configObject) {
-                reportDiagnostics([result.error], undefined);
-                ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-                return;
-            }
-            var configParseResult = ts.parseJsonConfigFileContent(configObject, ts.sys, ts.getNormalizedAbsolutePath(ts.getDirectoryPath(configFileName), ts.sys.getCurrentDirectory()), commandLine.options, configFileName);
-            if (configParseResult.errors.length > 0) {
-                reportDiagnostics(configParseResult.errors, undefined);
-                ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-                return;
-            }
-            if (ts.isWatchSet(configParseResult.options)) {
-                if (!ts.sys.watchFile) {
-                    reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_current_host_does_not_support_the_0_option, "--watch"), undefined);
-                    ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
-                }
-                if (!directoryWatcher && ts.sys.watchDirectory && configFileName) {
-                    var directory = ts.getDirectoryPath(configFileName);
-                    directoryWatcher = ts.sys.watchDirectory(directory == "" ? "." : directory, watchedDirectoryChanged, true);
-                }
-                ;
-            }
-            return configParseResult;
-        }
-        function performCompilation() {
-            if (!cachedProgram) {
-                if (configFileName) {
-                    var configParseResult = parseConfigFile();
-                    rootFileNames = configParseResult.fileNames;
-                    compilerOptions = configParseResult.options;
-                }
-                else {
-                    rootFileNames = commandLine.fileNames;
-                    compilerOptions = commandLine.options;
-                }
-                compilerHost = ts.createCompilerHost(compilerOptions);
-                hostGetSourceFile = compilerHost.getSourceFile;
-                compilerHost.getSourceFile = getSourceFile;
-                hostFileExists = compilerHost.fileExists;
-                compilerHost.fileExists = cachedFileExists;
-            }
-            if (compilerOptions.pretty) {
-                reportDiagnostic = reportDiagnosticWithColorAndContext;
-            }
-            cachedExistingFiles = {};
-            var compileResult = compile(rootFileNames, compilerOptions, compilerHost);
-            if (!ts.isWatchSet(compilerOptions)) {
-                return ts.sys.exit(compileResult.exitStatus);
-            }
-            setCachedProgram(compileResult.program);
-            reportWatchDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.Compilation_complete_Watching_for_file_changes));
-        }
-        function cachedFileExists(fileName) {
-            if (ts.hasProperty(cachedExistingFiles, fileName)) {
-                return cachedExistingFiles[fileName];
-            }
-            return cachedExistingFiles[fileName] = hostFileExists(fileName);
-        }
-        function getSourceFile(fileName, languageVersion, onError) {
-            if (cachedProgram) {
-                var sourceFile_1 = cachedProgram.getSourceFile(fileName);
-                if (sourceFile_1 && sourceFile_1.fileWatcher) {
-                    return sourceFile_1;
-                }
-            }
-            var sourceFile = hostGetSourceFile(fileName, languageVersion, onError);
-            if (sourceFile && ts.isWatchSet(compilerOptions) && ts.sys.watchFile) {
-                sourceFile.fileWatcher = ts.sys.watchFile(sourceFile.fileName, function (fileName, removed) { return sourceFileChanged(sourceFile, removed); });
-            }
-            return sourceFile;
-        }
-        function setCachedProgram(program) {
-            if (cachedProgram) {
-                var newSourceFiles_1 = program ? program.getSourceFiles() : undefined;
-                ts.forEach(cachedProgram.getSourceFiles(), function (sourceFile) {
-                    if (!(newSourceFiles_1 && ts.contains(newSourceFiles_1, sourceFile))) {
-                        if (sourceFile.fileWatcher) {
-                            sourceFile.fileWatcher.close();
-                            sourceFile.fileWatcher = undefined;
-                        }
-                    }
-                });
-            }
-            cachedProgram = program;
-        }
-        function sourceFileChanged(sourceFile, removed) {
-            sourceFile.fileWatcher.close();
-            sourceFile.fileWatcher = undefined;
-            if (removed) {
-                var index = rootFileNames.indexOf(sourceFile.fileName);
-                if (index >= 0) {
-                    rootFileNames.splice(index, 1);
-                }
-            }
-            startTimerForRecompilation();
-        }
-        function configFileChanged() {
-            setCachedProgram(undefined);
-            cachedConfigFileText = undefined;
-            startTimerForRecompilation();
-        }
-        function watchedDirectoryChanged(fileName) {
-            if (fileName && !ts.isSupportedSourceFileName(fileName, compilerOptions)) {
-                return;
-            }
-            startTimerForHandlingDirectoryChanges();
-        }
-        function startTimerForHandlingDirectoryChanges() {
-            if (timerHandleForDirectoryChanges) {
-                clearTimeout(timerHandleForDirectoryChanges);
-            }
-            timerHandleForDirectoryChanges = setTimeout(directoryChangeHandler, 250);
-        }
-        function directoryChangeHandler() {
-            var parsedCommandLine = parseConfigFile();
-            var newFileNames = ts.map(parsedCommandLine.fileNames, compilerHost.getCanonicalFileName);
-            var canonicalRootFileNames = ts.map(rootFileNames, compilerHost.getCanonicalFileName);
-            if (!ts.arrayIsEqualTo(newFileNames && newFileNames.sort(), canonicalRootFileNames && canonicalRootFileNames.sort())) {
-                setCachedProgram(undefined);
-                startTimerForRecompilation();
-            }
-        }
-        function startTimerForRecompilation() {
-            if (timerHandleForRecompilation) {
-                clearTimeout(timerHandleForRecompilation);
-            }
-            timerHandleForRecompilation = setTimeout(recompile, 250);
-        }
-        function recompile() {
-            timerHandleForRecompilation = undefined;
-            reportWatchDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.File_change_detected_Starting_incremental_compilation));
-            performCompilation();
-        }
-    }
-    ts.executeCommandLine = executeCommandLine;
-    function compile(fileNames, compilerOptions, compilerHost) {
-        ts.ioReadTime = 0;
-        ts.ioWriteTime = 0;
-        ts.programTime = 0;
-        ts.bindTime = 0;
-        ts.checkTime = 0;
-        ts.emitTime = 0;
-        var program = ts.createProgram(fileNames, compilerOptions, compilerHost);
-        var exitStatus = compileProgram();
-        if (compilerOptions.listFiles) {
-            ts.forEach(program.getSourceFiles(), function (file) {
-                ts.sys.write(file.fileName + ts.sys.newLine);
-            });
-        }
-        if (compilerOptions.diagnostics) {
-            var memoryUsed = ts.sys.getMemoryUsage ? ts.sys.getMemoryUsage() : -1;
-            reportCountStatistic("Files", program.getSourceFiles().length);
-            reportCountStatistic("Lines", countLines(program));
-            reportCountStatistic("Nodes", program.getNodeCount());
-            reportCountStatistic("Identifiers", program.getIdentifierCount());
-            reportCountStatistic("Symbols", program.getSymbolCount());
-            reportCountStatistic("Types", program.getTypeCount());
-            if (memoryUsed >= 0) {
-                reportStatisticalValue("Memory used", Math.round(memoryUsed / 1000) + "K");
-            }
-            reportTimeStatistic("I/O read", ts.ioReadTime);
-            reportTimeStatistic("I/O write", ts.ioWriteTime);
-            reportTimeStatistic("Parse time", ts.programTime);
-            reportTimeStatistic("Bind time", ts.bindTime);
-            reportTimeStatistic("Check time", ts.checkTime);
-            reportTimeStatistic("Emit time", ts.emitTime);
-            reportTimeStatistic("Total time", ts.programTime + ts.bindTime + ts.checkTime + ts.emitTime);
-        }
-        return { program: program, exitStatus: exitStatus };
-        function compileProgram() {
-            var diagnostics;
-            diagnostics = program.getSyntacticDiagnostics();
-            if (diagnostics.length === 0) {
-                diagnostics = program.getOptionsDiagnostics().concat(program.getGlobalDiagnostics());
-                if (diagnostics.length === 0) {
-                    diagnostics = program.getSemanticDiagnostics();
-                }
-            }
-            var emitOutput = program.emit();
-            diagnostics = diagnostics.concat(emitOutput.diagnostics);
-            reportDiagnostics(ts.sortAndDeduplicateDiagnostics(diagnostics), compilerHost);
-            reportEmittedFiles(emitOutput.emittedFiles, compilerHost);
-            if (emitOutput.emitSkipped && diagnostics.length > 0) {
-                return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
-            }
-            else if (diagnostics.length > 0) {
-                return ts.ExitStatus.DiagnosticsPresent_OutputsGenerated;
-            }
-            return ts.ExitStatus.Success;
-        }
-    }
-    function printVersion() {
-        ts.sys.write(getDiagnosticText(ts.Diagnostics.Version_0, ts.version) + ts.sys.newLine);
-    }
-    function printHelp() {
-        var output = "";
-        var syntaxLength = getDiagnosticText(ts.Diagnostics.Syntax_Colon_0, "").length;
-        var examplesLength = getDiagnosticText(ts.Diagnostics.Examples_Colon_0, "").length;
-        var marginLength = Math.max(syntaxLength, examplesLength);
-        var syntax = makePadding(marginLength - syntaxLength);
-        syntax += "tsc [" + getDiagnosticText(ts.Diagnostics.options) + "] [" + getDiagnosticText(ts.Diagnostics.file) + " ...]";
-        output += getDiagnosticText(ts.Diagnostics.Syntax_Colon_0, syntax);
-        output += ts.sys.newLine + ts.sys.newLine;
-        var padding = makePadding(marginLength);
-        output += getDiagnosticText(ts.Diagnostics.Examples_Colon_0, makePadding(marginLength - examplesLength) + "tsc hello.ts") + ts.sys.newLine;
-        output += padding + "tsc --out file.js file.ts" + ts.sys.newLine;
-        output += padding + "tsc @args.txt" + ts.sys.newLine;
-        output += ts.sys.newLine;
-        output += getDiagnosticText(ts.Diagnostics.Options_Colon) + ts.sys.newLine;
-        var optsList = ts.filter(ts.optionDeclarations.slice(), function (v) { return !v.experimental; });
-        optsList.sort(function (a, b) { return ts.compareValues(a.name.toLowerCase(), b.name.toLowerCase()); });
-        marginLength = 0;
-        var usageColumn = [];
-        var descriptionColumn = [];
-        var optionsDescriptionMap = {};
-        var _loop_2 = function(i) {
-            var option = optsList[i];
-            if (!option.description) {
-                return "continue";
-            }
-            var usageText_1 = " ";
-            if (option.shortName) {
-                usageText_1 += "-" + option.shortName;
-                usageText_1 += getParamType(option);
-                usageText_1 += ", ";
-            }
-            usageText_1 += "--" + option.name;
-            usageText_1 += getParamType(option);
-            usageColumn.push(usageText_1);
-            var description = void 0;
-            if (option.name === "lib") {
-                description = getDiagnosticText(option.description);
-                var options_1 = [];
-                var element = option.element;
-                ts.forEachKey(element.type, function (key) {
-                    options_1.push("'" + key + "'");
-                });
-                optionsDescriptionMap[description] = options_1;
-            }
-            else {
-                description = getDiagnosticText(option.description);
-            }
-            descriptionColumn.push(description);
-            marginLength = Math.max(usageText_1.length, marginLength);
-        };
-        for (var i = 0; i < optsList.length; i++) {
-            _loop_2(i);
-        }
-        var usageText = " @<" + getDiagnosticText(ts.Diagnostics.file) + ">";
-        usageColumn.push(usageText);
-        descriptionColumn.push(getDiagnosticText(ts.Diagnostics.Insert_command_line_options_and_files_from_a_file));
-        marginLength = Math.max(usageText.length, marginLength);
-        for (var i = 0; i < usageColumn.length; i++) {
-            var usage = usageColumn[i];
-            var description = descriptionColumn[i];
-            var kindsList = optionsDescriptionMap[description];
-            output += usage + makePadding(marginLength - usage.length + 2) + description + ts.sys.newLine;
-            if (kindsList) {
-                output += makePadding(marginLength + 4);
-                for (var _i = 0, kindsList_1 = kindsList; _i < kindsList_1.length; _i++) {
-                    var kind = kindsList_1[_i];
-                    output += kind + " ";
-                }
-                output += ts.sys.newLine;
-            }
-        }
-        ts.sys.write(output);
-        return;
-        function getParamType(option) {
-            if (option.paramType !== undefined) {
-                return " " + getDiagnosticText(option.paramType);
-            }
-            return "";
-        }
-        function makePadding(paddingLength) {
-            return Array(paddingLength + 1).join(" ");
-        }
-    }
-    function writeConfigFile(options, fileNames) {
-        var currentDirectory = ts.sys.getCurrentDirectory();
-        var file = ts.normalizePath(ts.combinePaths(currentDirectory, "tsconfig.json"));
-        if (ts.sys.fileExists(file)) {
-            reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.A_tsconfig_json_file_is_already_defined_at_Colon_0, file), undefined);
-        }
-        else {
-            var compilerOptions = ts.extend(options, ts.defaultInitCompilerOptions);
-            var configurations = {
-                compilerOptions: serializeCompilerOptions(compilerOptions)
-            };
-            if (fileNames && fileNames.length) {
-                configurations.files = fileNames;
-            }
-            else {
-                configurations.exclude = ["node_modules"];
-                if (compilerOptions.outDir) {
-                    configurations.exclude.push(compilerOptions.outDir);
-                }
-            }
-            ts.sys.writeFile(file, JSON.stringify(configurations, undefined, 4));
-            reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.Successfully_created_a_tsconfig_json_file), undefined);
-        }
-        return;
-        function serializeCompilerOptions(options) {
-            var result = {};
-            var optionsNameMap = ts.getOptionNameMap().optionNameMap;
-            for (var name_34 in options) {
-                if (ts.hasProperty(options, name_34)) {
-                    var value = options[name_34];
-                    switch (name_34) {
-                        case "init":
-                        case "watch":
-                        case "version":
-                        case "help":
-                        case "project":
-                            break;
-                        default:
-                            var optionDefinition = optionsNameMap[name_34.toLowerCase()];
-                            if (optionDefinition) {
-                                if (typeof optionDefinition.type === "string") {
-                                    result[name_34] = value;
-                                }
-                                else {
-                                    var typeMap = optionDefinition.type;
-                                    for (var key in typeMap) {
-                                        if (ts.hasProperty(typeMap, key)) {
-                                            if (typeMap[key] === value)
-                                                result[name_34] = key;
-                                        }
-                                    }
-                                }
-                            }
-                            break;
-                    }
-                }
-            }
-            return result;
-        }
-    }
-    var _a;
-})(ts || (ts = {}));
-ts.executeCommandLine(ts.sys.args);
+var ts;
+(function (ts) {
+    var OperationCanceledException = (function () {
+        function OperationCanceledException() {
+        }
+        return OperationCanceledException;
+    }());
+    ts.OperationCanceledException = OperationCanceledException;
+    (function (ExitStatus) {
+        ExitStatus[ExitStatus["Success"] = 0] = "Success";
+        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
+        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
+    })(ts.ExitStatus || (ts.ExitStatus = {}));
+    var ExitStatus = ts.ExitStatus;
+    (function (TypeReferenceSerializationKind) {
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithConstructSignatureAndValue"] = 1] = "TypeWithConstructSignatureAndValue";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["VoidType"] = 2] = "VoidType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["NumberLikeType"] = 3] = "NumberLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["StringLikeType"] = 4] = "StringLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["BooleanType"] = 5] = "BooleanType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ArrayLikeType"] = 6] = "ArrayLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ESSymbolType"] = 7] = "ESSymbolType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 8] = "TypeWithCallSignature";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 9] = "ObjectType";
+    })(ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
+    var TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind;
+    (function (DiagnosticCategory) {
+        DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
+        DiagnosticCategory[DiagnosticCategory["Error"] = 1] = "Error";
+        DiagnosticCategory[DiagnosticCategory["Message"] = 2] = "Message";
+    })(ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
+    var DiagnosticCategory = ts.DiagnosticCategory;
+    (function (ModuleResolutionKind) {
+        ModuleResolutionKind[ModuleResolutionKind["Classic"] = 1] = "Classic";
+        ModuleResolutionKind[ModuleResolutionKind["NodeJs"] = 2] = "NodeJs";
+    })(ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
+    var ModuleResolutionKind = ts.ModuleResolutionKind;
+    (function (ModuleKind) {
+        ModuleKind[ModuleKind["None"] = 0] = "None";
+        ModuleKind[ModuleKind["CommonJS"] = 1] = "CommonJS";
+        ModuleKind[ModuleKind["AMD"] = 2] = "AMD";
+        ModuleKind[ModuleKind["UMD"] = 3] = "UMD";
+        ModuleKind[ModuleKind["System"] = 4] = "System";
+        ModuleKind[ModuleKind["ES6"] = 5] = "ES6";
+        ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
+    })(ts.ModuleKind || (ts.ModuleKind = {}));
+    var ModuleKind = ts.ModuleKind;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function createFileMap(keyMapper) {
+        var files = {};
+        return {
+            get: get,
+            set: set,
+            contains: contains,
+            remove: remove,
+            forEachValue: forEachValueInMap,
+            clear: clear
+        };
+        function forEachValueInMap(f) {
+            for (var key in files) {
+                f(key, files[key]);
+            }
+        }
+        function get(path) {
+            return files[toKey(path)];
+        }
+        function set(path, value) {
+            files[toKey(path)] = value;
+        }
+        function contains(path) {
+            return hasProperty(files, toKey(path));
+        }
+        function remove(path) {
+            var key = toKey(path);
+            delete files[key];
+        }
+        function clear() {
+            files = {};
+        }
+        function toKey(path) {
+            return keyMapper ? keyMapper(path) : path;
+        }
+    }
+    ts.createFileMap = createFileMap;
+    function toPath(fileName, basePath, getCanonicalFileName) {
+        var nonCanonicalizedPath = isRootedDiskPath(fileName)
+            ? normalizePath(fileName)
+            : getNormalizedAbsolutePath(fileName, basePath);
+        return getCanonicalFileName(nonCanonicalizedPath);
+    }
+    ts.toPath = toPath;
+    function forEach(array, callback) {
+        if (array) {
+            for (var i = 0, len = array.length; i < len; i++) {
+                var result = callback(array[i], i);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.forEach = forEach;
+    function contains(array, value, areEqual) {
+        if (array) {
+            for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
+                var v = array_1[_i];
+                if (areEqual ? areEqual(v, value) : v === value) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+    ts.contains = contains;
+    function indexOf(array, value) {
+        if (array) {
+            for (var i = 0, len = array.length; i < len; i++) {
+                if (array[i] === value) {
+                    return i;
+                }
+            }
+        }
+        return -1;
+    }
+    ts.indexOf = indexOf;
+    function countWhere(array, predicate) {
+        var count = 0;
+        if (array) {
+            for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
+                var v = array_2[_i];
+                if (predicate(v)) {
+                    count++;
+                }
+            }
+        }
+        return count;
+    }
+    ts.countWhere = countWhere;
+    function filter(array, f) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_3 = array; _i < array_3.length; _i++) {
+                var item = array_3[_i];
+                if (f(item)) {
+                    result.push(item);
+                }
+            }
+        }
+        return result;
+    }
+    ts.filter = filter;
+    function map(array, f) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_4 = array; _i < array_4.length; _i++) {
+                var v = array_4[_i];
+                result.push(f(v));
+            }
+        }
+        return result;
+    }
+    ts.map = map;
+    function concatenate(array1, array2) {
+        if (!array2 || !array2.length)
+            return array1;
+        if (!array1 || !array1.length)
+            return array2;
+        return array1.concat(array2);
+    }
+    ts.concatenate = concatenate;
+    function deduplicate(array, areEqual) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
+                var item = array_5[_i];
+                if (!contains(result, item, areEqual)) {
+                    result.push(item);
+                }
+            }
+        }
+        return result;
+    }
+    ts.deduplicate = deduplicate;
+    function sum(array, prop) {
+        var result = 0;
+        for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
+            var v = array_6[_i];
+            result += v[prop];
+        }
+        return result;
+    }
+    ts.sum = sum;
+    function addRange(to, from) {
+        if (to && from) {
+            for (var _i = 0, from_1 = from; _i < from_1.length; _i++) {
+                var v = from_1[_i];
+                to.push(v);
+            }
+        }
+    }
+    ts.addRange = addRange;
+    function rangeEquals(array1, array2, pos, end) {
+        while (pos < end) {
+            if (array1[pos] !== array2[pos]) {
+                return false;
+            }
+            pos++;
+        }
+        return true;
+    }
+    ts.rangeEquals = rangeEquals;
+    function lastOrUndefined(array) {
+        if (array.length === 0) {
+            return undefined;
+        }
+        return array[array.length - 1];
+    }
+    ts.lastOrUndefined = lastOrUndefined;
+    function binarySearch(array, value) {
+        var low = 0;
+        var high = array.length - 1;
+        while (low <= high) {
+            var middle = low + ((high - low) >> 1);
+            var midValue = array[middle];
+            if (midValue === value) {
+                return middle;
+            }
+            else if (midValue > value) {
+                high = middle - 1;
+            }
+            else {
+                low = middle + 1;
+            }
+        }
+        return ~low;
+    }
+    ts.binarySearch = binarySearch;
+    function reduceLeft(array, f, initial) {
+        if (array) {
+            var count = array.length;
+            if (count > 0) {
+                var pos = 0;
+                var result = void 0;
+                if (arguments.length <= 2) {
+                    result = array[pos];
+                    pos++;
+                }
+                else {
+                    result = initial;
+                }
+                while (pos < count) {
+                    result = f(result, array[pos]);
+                    pos++;
+                }
+                return result;
+            }
+        }
+        return initial;
+    }
+    ts.reduceLeft = reduceLeft;
+    function reduceRight(array, f, initial) {
+        if (array) {
+            var pos = array.length - 1;
+            if (pos >= 0) {
+                var result = void 0;
+                if (arguments.length <= 2) {
+                    result = array[pos];
+                    pos--;
+                }
+                else {
+                    result = initial;
+                }
+                while (pos >= 0) {
+                    result = f(result, array[pos]);
+                    pos--;
+                }
+                return result;
+            }
+        }
+        return initial;
+    }
+    ts.reduceRight = reduceRight;
+    var hasOwnProperty = Object.prototype.hasOwnProperty;
+    function hasProperty(map, key) {
+        return hasOwnProperty.call(map, key);
+    }
+    ts.hasProperty = hasProperty;
+    function getKeys(map) {
+        var keys = [];
+        for (var key in map) {
+            keys.push(key);
+        }
+        return keys;
+    }
+    ts.getKeys = getKeys;
+    function getProperty(map, key) {
+        return hasOwnProperty.call(map, key) ? map[key] : undefined;
+    }
+    ts.getProperty = getProperty;
+    function isEmpty(map) {
+        for (var id in map) {
+            if (hasProperty(map, id)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.isEmpty = isEmpty;
+    function clone(object) {
+        var result = {};
+        for (var id in object) {
+            result[id] = object[id];
+        }
+        return result;
+    }
+    ts.clone = clone;
+    function extend(first, second) {
+        var result = {};
+        for (var id in first) {
+            result[id] = first[id];
+        }
+        for (var id in second) {
+            if (!hasProperty(result, id)) {
+                result[id] = second[id];
+            }
+        }
+        return result;
+    }
+    ts.extend = extend;
+    function forEachValue(map, callback) {
+        var result;
+        for (var id in map) {
+            if (result = callback(map[id]))
+                break;
+        }
+        return result;
+    }
+    ts.forEachValue = forEachValue;
+    function forEachKey(map, callback) {
+        var result;
+        for (var id in map) {
+            if (result = callback(id))
+                break;
+        }
+        return result;
+    }
+    ts.forEachKey = forEachKey;
+    function lookUp(map, key) {
+        return hasProperty(map, key) ? map[key] : undefined;
+    }
+    ts.lookUp = lookUp;
+    function copyMap(source, target) {
+        for (var p in source) {
+            target[p] = source[p];
+        }
+    }
+    ts.copyMap = copyMap;
+    function arrayToMap(array, makeKey) {
+        var result = {};
+        forEach(array, function (value) {
+            result[makeKey(value)] = value;
+        });
+        return result;
+    }
+    ts.arrayToMap = arrayToMap;
+    function reduceProperties(map, callback, initial) {
+        var result = initial;
+        if (map) {
+            for (var key in map) {
+                if (hasProperty(map, key)) {
+                    result = callback(result, map[key], String(key));
+                }
+            }
+        }
+        return result;
+    }
+    ts.reduceProperties = reduceProperties;
+    function isArray(value) {
+        return Array.isArray ? Array.isArray(value) : value instanceof Array;
+    }
+    ts.isArray = isArray;
+    function memoize(callback) {
+        var value;
+        return function () {
+            if (callback) {
+                value = callback();
+                callback = undefined;
+            }
+            return value;
+        };
+    }
+    ts.memoize = memoize;
+    function formatStringFromArgs(text, args, baseIndex) {
+        baseIndex = baseIndex || 0;
+        return text.replace(/{(\d+)}/g, function (match, index) { return args[+index + baseIndex]; });
+    }
+    ts.localizedDiagnosticMessages = undefined;
+    function getLocaleSpecificMessage(message) {
+        return ts.localizedDiagnosticMessages && ts.localizedDiagnosticMessages[message.key]
+            ? ts.localizedDiagnosticMessages[message.key]
+            : message.message;
+    }
+    ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
+    function createFileDiagnostic(file, start, length, message) {
+        var end = start + length;
+        Debug.assert(start >= 0, "start must be non-negative, is " + start);
+        Debug.assert(length >= 0, "length must be non-negative, is " + length);
+        if (file) {
+            Debug.assert(start <= file.text.length, "start must be within the bounds of the file. " + start + " > " + file.text.length);
+            Debug.assert(end <= file.text.length, "end must be the bounds of the file. " + end + " > " + file.text.length);
+        }
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 4) {
+            text = formatStringFromArgs(text, arguments, 4);
+        }
+        return {
+            file: file,
+            start: start,
+            length: length,
+            messageText: text,
+            category: message.category,
+            code: message.code
+        };
+    }
+    ts.createFileDiagnostic = createFileDiagnostic;
+    function formatMessage(dummy, message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 2) {
+            text = formatStringFromArgs(text, arguments, 2);
+        }
+        return text;
+    }
+    ts.formatMessage = formatMessage;
+    function createCompilerDiagnostic(message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 1) {
+            text = formatStringFromArgs(text, arguments, 1);
+        }
+        return {
+            file: undefined,
+            start: undefined,
+            length: undefined,
+            messageText: text,
+            category: message.category,
+            code: message.code
+        };
+    }
+    ts.createCompilerDiagnostic = createCompilerDiagnostic;
+    function chainDiagnosticMessages(details, message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 2) {
+            text = formatStringFromArgs(text, arguments, 2);
+        }
+        return {
+            messageText: text,
+            category: message.category,
+            code: message.code,
+            next: details
+        };
+    }
+    ts.chainDiagnosticMessages = chainDiagnosticMessages;
+    function concatenateDiagnosticMessageChains(headChain, tailChain) {
+        var lastChain = headChain;
+        while (lastChain.next) {
+            lastChain = lastChain.next;
+        }
+        lastChain.next = tailChain;
+        return headChain;
+    }
+    ts.concatenateDiagnosticMessageChains = concatenateDiagnosticMessageChains;
+    function compareValues(a, b) {
+        if (a === b)
+            return 0;
+        if (a === undefined)
+            return -1;
+        if (b === undefined)
+            return 1;
+        return a < b ? -1 : 1;
+    }
+    ts.compareValues = compareValues;
+    function getDiagnosticFileName(diagnostic) {
+        return diagnostic.file ? diagnostic.file.fileName : undefined;
+    }
+    function compareDiagnostics(d1, d2) {
+        return compareValues(getDiagnosticFileName(d1), getDiagnosticFileName(d2)) ||
+            compareValues(d1.start, d2.start) ||
+            compareValues(d1.length, d2.length) ||
+            compareValues(d1.code, d2.code) ||
+            compareMessageText(d1.messageText, d2.messageText) ||
+            0;
+    }
+    ts.compareDiagnostics = compareDiagnostics;
+    function compareMessageText(text1, text2) {
+        while (text1 && text2) {
+            var string1 = typeof text1 === "string" ? text1 : text1.messageText;
+            var string2 = typeof text2 === "string" ? text2 : text2.messageText;
+            var res = compareValues(string1, string2);
+            if (res) {
+                return res;
+            }
+            text1 = typeof text1 === "string" ? undefined : text1.next;
+            text2 = typeof text2 === "string" ? undefined : text2.next;
+        }
+        if (!text1 && !text2) {
+            return 0;
+        }
+        return text1 ? 1 : -1;
+    }
+    function sortAndDeduplicateDiagnostics(diagnostics) {
+        return deduplicateSortedDiagnostics(diagnostics.sort(compareDiagnostics));
+    }
+    ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
+    function deduplicateSortedDiagnostics(diagnostics) {
+        if (diagnostics.length < 2) {
+            return diagnostics;
+        }
+        var newDiagnostics = [diagnostics[0]];
+        var previousDiagnostic = diagnostics[0];
+        for (var i = 1; i < diagnostics.length; i++) {
+            var currentDiagnostic = diagnostics[i];
+            var isDupe = compareDiagnostics(currentDiagnostic, previousDiagnostic) === 0;
+            if (!isDupe) {
+                newDiagnostics.push(currentDiagnostic);
+                previousDiagnostic = currentDiagnostic;
+            }
+        }
+        return newDiagnostics;
+    }
+    ts.deduplicateSortedDiagnostics = deduplicateSortedDiagnostics;
+    function normalizeSlashes(path) {
+        return path.replace(/\\/g, "/");
+    }
+    ts.normalizeSlashes = normalizeSlashes;
+    function getRootLength(path) {
+        if (path.charCodeAt(0) === 47) {
+            if (path.charCodeAt(1) !== 47)
+                return 1;
+            var p1 = path.indexOf("/", 2);
+            if (p1 < 0)
+                return 2;
+            var p2 = path.indexOf("/", p1 + 1);
+            if (p2 < 0)
+                return p1 + 1;
+            return p2 + 1;
+        }
+        if (path.charCodeAt(1) === 58) {
+            if (path.charCodeAt(2) === 47)
+                return 3;
+            return 2;
+        }
+        if (path.lastIndexOf("file:///", 0) === 0) {
+            return "file:///".length;
+        }
+        var idx = path.indexOf("://");
+        if (idx !== -1) {
+            return idx + "://".length;
+        }
+        return 0;
+    }
+    ts.getRootLength = getRootLength;
+    ts.directorySeparator = "/";
+    function getNormalizedParts(normalizedSlashedPath, rootLength) {
+        var parts = normalizedSlashedPath.substr(rootLength).split(ts.directorySeparator);
+        var normalized = [];
+        for (var _i = 0, parts_1 = parts; _i < parts_1.length; _i++) {
+            var part = parts_1[_i];
+            if (part !== ".") {
+                if (part === ".." && normalized.length > 0 && lastOrUndefined(normalized) !== "..") {
+                    normalized.pop();
+                }
+                else {
+                    if (part) {
+                        normalized.push(part);
+                    }
+                }
+            }
+        }
+        return normalized;
+    }
+    function normalizePath(path) {
+        path = normalizeSlashes(path);
+        var rootLength = getRootLength(path);
+        var normalized = getNormalizedParts(path, rootLength);
+        return path.substr(0, rootLength) + normalized.join(ts.directorySeparator);
+    }
+    ts.normalizePath = normalizePath;
+    function getDirectoryPath(path) {
+        return path.substr(0, Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator)));
+    }
+    ts.getDirectoryPath = getDirectoryPath;
+    function isUrl(path) {
+        return path && !isRootedDiskPath(path) && path.indexOf("://") !== -1;
+    }
+    ts.isUrl = isUrl;
+    function isRootedDiskPath(path) {
+        return getRootLength(path) !== 0;
+    }
+    ts.isRootedDiskPath = isRootedDiskPath;
+    function normalizedPathComponents(path, rootLength) {
+        var normalizedParts = getNormalizedParts(path, rootLength);
+        return [path.substr(0, rootLength)].concat(normalizedParts);
+    }
+    function getNormalizedPathComponents(path, currentDirectory) {
+        path = normalizeSlashes(path);
+        var rootLength = getRootLength(path);
+        if (rootLength === 0) {
+            path = combinePaths(normalizeSlashes(currentDirectory), path);
+            rootLength = getRootLength(path);
+        }
+        return normalizedPathComponents(path, rootLength);
+    }
+    ts.getNormalizedPathComponents = getNormalizedPathComponents;
+    function getNormalizedAbsolutePath(fileName, currentDirectory) {
+        return getNormalizedPathFromPathComponents(getNormalizedPathComponents(fileName, currentDirectory));
+    }
+    ts.getNormalizedAbsolutePath = getNormalizedAbsolutePath;
+    function getNormalizedPathFromPathComponents(pathComponents) {
+        if (pathComponents && pathComponents.length) {
+            return pathComponents[0] + pathComponents.slice(1).join(ts.directorySeparator);
+        }
+    }
+    ts.getNormalizedPathFromPathComponents = getNormalizedPathFromPathComponents;
+    function getNormalizedPathComponentsOfUrl(url) {
+        var urlLength = url.length;
+        var rootLength = url.indexOf("://") + "://".length;
+        while (rootLength < urlLength) {
+            if (url.charCodeAt(rootLength) === 47) {
+                rootLength++;
+            }
+            else {
+                break;
+            }
+        }
+        if (rootLength === urlLength) {
+            return [url];
+        }
+        var indexOfNextSlash = url.indexOf(ts.directorySeparator, rootLength);
+        if (indexOfNextSlash !== -1) {
+            rootLength = indexOfNextSlash + 1;
+            return normalizedPathComponents(url, rootLength);
+        }
+        else {
+            return [url + ts.directorySeparator];
+        }
+    }
+    function getNormalizedPathOrUrlComponents(pathOrUrl, currentDirectory) {
+        if (isUrl(pathOrUrl)) {
+            return getNormalizedPathComponentsOfUrl(pathOrUrl);
+        }
+        else {
+            return getNormalizedPathComponents(pathOrUrl, currentDirectory);
+        }
+    }
+    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
+        var pathComponents = getNormalizedPathOrUrlComponents(relativeOrAbsolutePath, currentDirectory);
+        var directoryComponents = getNormalizedPathOrUrlComponents(directoryPathOrUrl, currentDirectory);
+        if (directoryComponents.length > 1 && lastOrUndefined(directoryComponents) === "") {
+            directoryComponents.length--;
+        }
+        var joinStartIndex;
+        for (joinStartIndex = 0; joinStartIndex < pathComponents.length && joinStartIndex < directoryComponents.length; joinStartIndex++) {
+            if (getCanonicalFileName(directoryComponents[joinStartIndex]) !== getCanonicalFileName(pathComponents[joinStartIndex])) {
+                break;
+            }
+        }
+        if (joinStartIndex) {
+            var relativePath = "";
+            var relativePathComponents = pathComponents.slice(joinStartIndex, pathComponents.length);
+            for (; joinStartIndex < directoryComponents.length; joinStartIndex++) {
+                if (directoryComponents[joinStartIndex] !== "") {
+                    relativePath = relativePath + ".." + ts.directorySeparator;
+                }
+            }
+            return relativePath + relativePathComponents.join(ts.directorySeparator);
+        }
+        var absolutePath = getNormalizedPathFromPathComponents(pathComponents);
+        if (isAbsolutePathAnUrl && isRootedDiskPath(absolutePath)) {
+            absolutePath = "file:///" + absolutePath;
+        }
+        return absolutePath;
+    }
+    ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
+    function getBaseFileName(path) {
+        if (path === undefined) {
+            return undefined;
+        }
+        var i = path.lastIndexOf(ts.directorySeparator);
+        return i < 0 ? path : path.substring(i + 1);
+    }
+    ts.getBaseFileName = getBaseFileName;
+    function combinePaths(path1, path2) {
+        if (!(path1 && path1.length))
+            return path2;
+        if (!(path2 && path2.length))
+            return path1;
+        if (getRootLength(path2) !== 0)
+            return path2;
+        if (path1.charAt(path1.length - 1) === ts.directorySeparator)
+            return path1 + path2;
+        return path1 + ts.directorySeparator + path2;
+    }
+    ts.combinePaths = combinePaths;
+    function fileExtensionIs(path, extension) {
+        var pathLen = path.length;
+        var extLen = extension.length;
+        return pathLen > extLen && path.substr(pathLen - extLen, extLen) === extension;
+    }
+    ts.fileExtensionIs = fileExtensionIs;
+    function ensureScriptKind(fileName, scriptKind) {
+        return (scriptKind || getScriptKindFromFileName(fileName)) || 3;
+    }
+    ts.ensureScriptKind = ensureScriptKind;
+    function getScriptKindFromFileName(fileName) {
+        var ext = fileName.substr(fileName.lastIndexOf("."));
+        switch (ext.toLowerCase()) {
+            case ".js":
+                return 1;
+            case ".jsx":
+                return 2;
+            case ".ts":
+                return 3;
+            case ".tsx":
+                return 4;
+            default:
+                return 0;
+        }
+    }
+    ts.getScriptKindFromFileName = getScriptKindFromFileName;
+    ts.supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
+    ts.supportedJavascriptExtensions = [".js", ".jsx"];
+    var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
+    function getSupportedExtensions(options) {
+        return options && options.allowJs ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
+    }
+    ts.getSupportedExtensions = getSupportedExtensions;
+    function isSupportedSourceFileName(fileName, compilerOptions) {
+        if (!fileName) {
+            return false;
+        }
+        for (var _i = 0, _a = getSupportedExtensions(compilerOptions); _i < _a.length; _i++) {
+            var extension = _a[_i];
+            if (fileExtensionIs(fileName, extension)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.isSupportedSourceFileName = isSupportedSourceFileName;
+    var extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
+    function removeFileExtension(path) {
+        for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
+            var ext = extensionsToRemove_1[_i];
+            var extensionless = tryRemoveExtension(path, ext);
+            if (extensionless !== undefined) {
+                return extensionless;
+            }
+        }
+        return path;
+    }
+    ts.removeFileExtension = removeFileExtension;
+    function tryRemoveExtension(path, extension) {
+        return fileExtensionIs(path, extension) ? path.substring(0, path.length - extension.length) : undefined;
+    }
+    ts.tryRemoveExtension = tryRemoveExtension;
+    function isJsxOrTsxExtension(ext) {
+        return ext === ".jsx" || ext === ".tsx";
+    }
+    ts.isJsxOrTsxExtension = isJsxOrTsxExtension;
+    function Symbol(flags, name) {
+        this.flags = flags;
+        this.name = name;
+        this.declarations = undefined;
+    }
+    function Type(checker, flags) {
+        this.flags = flags;
+    }
+    function Signature(checker) {
+    }
+    function Node(kind, pos, end) {
+        this.kind = kind;
+        this.pos = pos;
+        this.end = end;
+        this.flags = 0;
+        this.parent = undefined;
+    }
+    ts.objectAllocator = {
+        getNodeConstructor: function () { return Node; },
+        getSourceFileConstructor: function () { return Node; },
+        getSymbolConstructor: function () { return Symbol; },
+        getTypeConstructor: function () { return Type; },
+        getSignatureConstructor: function () { return Signature; }
+    };
+    var Debug;
+    (function (Debug) {
+        var currentAssertionLevel = 0;
+        function shouldAssert(level) {
+            return currentAssertionLevel >= level;
+        }
+        Debug.shouldAssert = shouldAssert;
+        function assert(expression, message, verboseDebugInfo) {
+            if (!expression) {
+                var verboseDebugString = "";
+                if (verboseDebugInfo) {
+                    verboseDebugString = "\r\nVerbose Debug Information: " + verboseDebugInfo();
+                }
+                debugger;
+                throw new Error("Debug Failure. False expression: " + (message || "") + verboseDebugString);
+            }
+        }
+        Debug.assert = assert;
+        function fail(message) {
+            Debug.assert(false, message);
+        }
+        Debug.fail = fail;
+    })(Debug = ts.Debug || (ts.Debug = {}));
+    function copyListRemovingItem(item, list) {
+        var copiedList = [];
+        for (var _i = 0, list_1 = list; _i < list_1.length; _i++) {
+            var e = list_1[_i];
+            if (e !== item) {
+                copiedList.push(e);
+            }
+        }
+        return copiedList;
+    }
+    ts.copyListRemovingItem = copyListRemovingItem;
+    function createGetCanonicalFileName(useCaseSensitivefileNames) {
+        return useCaseSensitivefileNames
+            ? (function (fileName) { return fileName; })
+            : (function (fileName) { return fileName.toLowerCase(); });
+    }
+    ts.createGetCanonicalFileName = createGetCanonicalFileName;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.sys = (function () {
+        function getWScriptSystem() {
+            var fso = new ActiveXObject("Scripting.FileSystemObject");
+            var fileStream = new ActiveXObject("ADODB.Stream");
+            fileStream.Type = 2;
+            var binaryStream = new ActiveXObject("ADODB.Stream");
+            binaryStream.Type = 1;
+            var args = [];
+            for (var i = 0; i < WScript.Arguments.length; i++) {
+                args[i] = WScript.Arguments.Item(i);
+            }
+            function readFile(fileName, encoding) {
+                if (!fso.FileExists(fileName)) {
+                    return undefined;
+                }
+                fileStream.Open();
+                try {
+                    if (encoding) {
+                        fileStream.Charset = encoding;
+                        fileStream.LoadFromFile(fileName);
+                    }
+                    else {
+                        fileStream.Charset = "x-ansi";
+                        fileStream.LoadFromFile(fileName);
+                        var bom = fileStream.ReadText(2) || "";
+                        fileStream.Position = 0;
+                        fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
+                    }
+                    return fileStream.ReadText();
+                }
+                catch (e) {
+                    throw e;
+                }
+                finally {
+                    fileStream.Close();
+                }
+            }
+            function writeFile(fileName, data, writeByteOrderMark) {
+                fileStream.Open();
+                binaryStream.Open();
+                try {
+                    fileStream.Charset = "utf-8";
+                    fileStream.WriteText(data);
+                    if (writeByteOrderMark) {
+                        fileStream.Position = 0;
+                    }
+                    else {
+                        fileStream.Position = 3;
+                    }
+                    fileStream.CopyTo(binaryStream);
+                    binaryStream.SaveToFile(fileName, 2);
+                }
+                finally {
+                    binaryStream.Close();
+                    fileStream.Close();
+                }
+            }
+            function getCanonicalPath(path) {
+                return path.toLowerCase();
+            }
+            function getNames(collection) {
+                var result = [];
+                for (var e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
+                    result.push(e.item().Name);
+                }
+                return result.sort();
+            }
+            function getDirectories(path) {
+                var folder = fso.GetFolder(path);
+                return getNames(folder.subfolders);
+            }
+            function readDirectory(path, extension, exclude) {
+                var result = [];
+                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
+                visitDirectory(path);
+                return result;
+                function visitDirectory(path) {
+                    var folder = fso.GetFolder(path || ".");
+                    var files = getNames(folder.files);
+                    for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
+                        var current = files_1[_i];
+                        var name_1 = ts.combinePaths(path, current);
+                        if ((!extension || ts.fileExtensionIs(name_1, extension)) && !ts.contains(exclude, getCanonicalPath(name_1))) {
+                            result.push(name_1);
+                        }
+                    }
+                    var subfolders = getNames(folder.subfolders);
+                    for (var _a = 0, subfolders_1 = subfolders; _a < subfolders_1.length; _a++) {
+                        var current = subfolders_1[_a];
+                        var name_2 = ts.combinePaths(path, current);
+                        if (!ts.contains(exclude, getCanonicalPath(name_2))) {
+                            visitDirectory(name_2);
+                        }
+                    }
+                }
+            }
+            return {
+                args: args,
+                newLine: "\r\n",
+                useCaseSensitiveFileNames: false,
+                write: function (s) {
+                    WScript.StdOut.Write(s);
+                },
+                readFile: readFile,
+                writeFile: writeFile,
+                resolvePath: function (path) {
+                    return fso.GetAbsolutePathName(path);
+                },
+                fileExists: function (path) {
+                    return fso.FileExists(path);
+                },
+                directoryExists: function (path) {
+                    return fso.FolderExists(path);
+                },
+                createDirectory: function (directoryName) {
+                    if (!this.directoryExists(directoryName)) {
+                        fso.CreateFolder(directoryName);
+                    }
+                },
+                getExecutingFilePath: function () {
+                    return WScript.ScriptFullName;
+                },
+                getCurrentDirectory: function () {
+                    return new ActiveXObject("WScript.Shell").CurrentDirectory;
+                },
+                getDirectories: getDirectories,
+                readDirectory: readDirectory,
+                exit: function (exitCode) {
+                    try {
+                        WScript.Quit(exitCode);
+                    }
+                    catch (e) {
+                    }
+                }
+            };
+        }
+        function getNodeSystem() {
+            var _fs = require("fs");
+            var _path = require("path");
+            var _os = require("os");
+            var _crypto = require("crypto");
+            var useNonPollingWatchers = process.env["TSC_NONPOLLING_WATCHER"];
+            function createWatchedFileSet() {
+                var dirWatchers = {};
+                var fileWatcherCallbacks = {};
+                return { addFile: addFile, removeFile: removeFile };
+                function reduceDirWatcherRefCountForFile(fileName) {
+                    var dirName = ts.getDirectoryPath(fileName);
+                    if (ts.hasProperty(dirWatchers, dirName)) {
+                        var watcher = dirWatchers[dirName];
+                        watcher.referenceCount -= 1;
+                        if (watcher.referenceCount <= 0) {
+                            watcher.close();
+                            delete dirWatchers[dirName];
+                        }
+                    }
+                }
+                function addDirWatcher(dirPath) {
+                    if (ts.hasProperty(dirWatchers, dirPath)) {
+                        var watcher_1 = dirWatchers[dirPath];
+                        watcher_1.referenceCount += 1;
+                        return;
+                    }
+                    var watcher = _fs.watch(dirPath, { persistent: true }, function (eventName, relativeFileName) { return fileEventHandler(eventName, relativeFileName, dirPath); });
+                    watcher.referenceCount = 1;
+                    dirWatchers[dirPath] = watcher;
+                    return;
+                }
+                function addFileWatcherCallback(filePath, callback) {
+                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
+                        fileWatcherCallbacks[filePath].push(callback);
+                    }
+                    else {
+                        fileWatcherCallbacks[filePath] = [callback];
+                    }
+                }
+                function addFile(fileName, callback) {
+                    addFileWatcherCallback(fileName, callback);
+                    addDirWatcher(ts.getDirectoryPath(fileName));
+                    return { fileName: fileName, callback: callback };
+                }
+                function removeFile(watchedFile) {
+                    removeFileWatcherCallback(watchedFile.fileName, watchedFile.callback);
+                    reduceDirWatcherRefCountForFile(watchedFile.fileName);
+                }
+                function removeFileWatcherCallback(filePath, callback) {
+                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
+                        var newCallbacks = ts.copyListRemovingItem(callback, fileWatcherCallbacks[filePath]);
+                        if (newCallbacks.length === 0) {
+                            delete fileWatcherCallbacks[filePath];
+                        }
+                        else {
+                            fileWatcherCallbacks[filePath] = newCallbacks;
+                        }
+                    }
+                }
+                function fileEventHandler(eventName, relativeFileName, baseDirPath) {
+                    var fileName = typeof relativeFileName !== "string"
+                        ? undefined
+                        : ts.getNormalizedAbsolutePath(relativeFileName, baseDirPath);
+                    if ((eventName === "change" || eventName === "rename") && ts.hasProperty(fileWatcherCallbacks, fileName)) {
+                        for (var _i = 0, _a = fileWatcherCallbacks[fileName]; _i < _a.length; _i++) {
+                            var fileCallback = _a[_i];
+                            fileCallback(fileName);
+                        }
+                    }
+                }
+            }
+            var watchedFileSet = createWatchedFileSet();
+            function isNode4OrLater() {
+                return parseInt(process.version.charAt(1)) >= 4;
+            }
+            var platform = _os.platform();
+            var useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
+            function readFile(fileName, encoding) {
+                if (!fileExists(fileName)) {
+                    return undefined;
+                }
+                var buffer = _fs.readFileSync(fileName);
+                var len = buffer.length;
+                if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
+                    len &= ~1;
+                    for (var i = 0; i < len; i += 2) {
+                        var temp = buffer[i];
+                        buffer[i] = buffer[i + 1];
+                        buffer[i + 1] = temp;
+                    }
+                    return buffer.toString("utf16le", 2);
+                }
+                if (len >= 2 && buffer[0] === 0xFF && buffer[1] === 0xFE) {
+                    return buffer.toString("utf16le", 2);
+                }
+                if (len >= 3 && buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
+                    return buffer.toString("utf8", 3);
+                }
+                return buffer.toString("utf8");
+            }
+            function writeFile(fileName, data, writeByteOrderMark) {
+                if (writeByteOrderMark) {
+                    data = "\uFEFF" + data;
+                }
+                var fd;
+                try {
+                    fd = _fs.openSync(fileName, "w");
+                    _fs.writeSync(fd, data, undefined, "utf8");
+                }
+                finally {
+                    if (fd !== undefined) {
+                        _fs.closeSync(fd);
+                    }
+                }
+            }
+            function getCanonicalPath(path) {
+                return useCaseSensitiveFileNames ? path : path.toLowerCase();
+            }
+            function fileSystemEntryExists(path, entryKind) {
+                try {
+                    var stat = _fs.statSync(path);
+                    switch (entryKind) {
+                        case 0: return stat.isFile();
+                        case 1: return stat.isDirectory();
+                    }
+                }
+                catch (e) {
+                    return false;
+                }
+            }
+            function fileExists(path) {
+                return fileSystemEntryExists(path, 0);
+            }
+            function directoryExists(path) {
+                return fileSystemEntryExists(path, 1);
+            }
+            function getDirectories(path) {
+                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1); });
+            }
+            function readDirectory(path, extension, exclude) {
+                var result = [];
+                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
+                visitDirectory(path);
+                return result;
+                function visitDirectory(path) {
+                    var files = _fs.readdirSync(path || ".").sort();
+                    var directories = [];
+                    for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
+                        var current = files_2[_i];
+                        if (current === "." || current === "..") {
+                            continue;
+                        }
+                        var name_3 = ts.combinePaths(path, current);
+                        if (!ts.contains(exclude, getCanonicalPath(name_3))) {
+                            var stat = _fs.statSync(name_3);
+                            if (stat.isFile()) {
+                                if (!extension || ts.fileExtensionIs(name_3, extension)) {
+                                    result.push(name_3);
+                                }
+                            }
+                            else if (stat.isDirectory()) {
+                                directories.push(name_3);
+                            }
+                        }
+                    }
+                    for (var _a = 0, directories_1 = directories; _a < directories_1.length; _a++) {
+                        var current = directories_1[_a];
+                        visitDirectory(current);
+                    }
+                }
+            }
+            return {
+                args: process.argv.slice(2),
+                newLine: _os.EOL,
+                useCaseSensitiveFileNames: useCaseSensitiveFileNames,
+                write: function (s) {
+                    process.stdout.write(s);
+                },
+                readFile: readFile,
+                writeFile: writeFile,
+                watchFile: function (fileName, callback) {
+                    if (useNonPollingWatchers) {
+                        var watchedFile_1 = watchedFileSet.addFile(fileName, callback);
+                        return {
+                            close: function () { return watchedFileSet.removeFile(watchedFile_1); }
+                        };
+                    }
+                    else {
+                        _fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
+                        return {
+                            close: function () { return _fs.unwatchFile(fileName, fileChanged); }
+                        };
+                    }
+                    function fileChanged(curr, prev) {
+                        if (+curr.mtime <= +prev.mtime) {
+                            return;
+                        }
+                        callback(fileName);
+                    }
+                },
+                watchDirectory: function (directoryName, callback, recursive) {
+                    var options;
+                    if (isNode4OrLater() && (process.platform === "win32" || process.platform === "darwin")) {
+                        options = { persistent: true, recursive: !!recursive };
+                    }
+                    else {
+                        options = { persistent: true };
+                    }
+                    return _fs.watch(directoryName, options, function (eventName, relativeFileName) {
+                        if (eventName === "rename") {
+                            callback(!relativeFileName ? relativeFileName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
+                        }
+                        ;
+                    });
+                },
+                resolvePath: function (path) {
+                    return _path.resolve(path);
+                },
+                fileExists: fileExists,
+                directoryExists: directoryExists,
+                createDirectory: function (directoryName) {
+                    if (!this.directoryExists(directoryName)) {
+                        _fs.mkdirSync(directoryName);
+                    }
+                },
+                getExecutingFilePath: function () {
+                    return __filename;
+                },
+                getCurrentDirectory: function () {
+                    return process.cwd();
+                },
+                getDirectories: getDirectories,
+                readDirectory: readDirectory,
+                getModifiedTime: function (path) {
+                    try {
+                        return _fs.statSync(path).mtime;
+                    }
+                    catch (e) {
+                        return undefined;
+                    }
+                },
+                createHash: function (data) {
+                    var hash = _crypto.createHash("md5");
+                    hash.update(data);
+                    return hash.digest("hex");
+                },
+                getMemoryUsage: function () {
+                    if (global.gc) {
+                        global.gc();
+                    }
+                    return process.memoryUsage().heapUsed;
+                },
+                exit: function (exitCode) {
+                    process.exit(exitCode);
+                },
+                realpath: function (path) {
+                    return _fs.realpathSync(path);
+                }
+            };
+        }
+        function getChakraSystem() {
+            var realpath = ChakraHost.realpath && (function (path) { return ChakraHost.realpath(path); });
+            return {
+                newLine: ChakraHost.newLine || "\r\n",
+                args: ChakraHost.args,
+                useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
+                write: ChakraHost.echo,
+                readFile: function (path, encoding) {
+                    return ChakraHost.readFile(path);
+                },
+                writeFile: function (path, data, writeByteOrderMark) {
+                    if (writeByteOrderMark) {
+                        data = "\uFEFF" + data;
+                    }
+                    ChakraHost.writeFile(path, data);
+                },
+                resolvePath: ChakraHost.resolvePath,
+                fileExists: ChakraHost.fileExists,
+                directoryExists: ChakraHost.directoryExists,
+                createDirectory: ChakraHost.createDirectory,
+                getExecutingFilePath: function () { return ChakraHost.executingFile; },
+                getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
+                getDirectories: ChakraHost.getDirectories,
+                readDirectory: ChakraHost.readDirectory,
+                exit: ChakraHost.quit,
+                realpath: realpath
+            };
+        }
+        if (typeof ChakraHost !== "undefined") {
+            return getChakraSystem();
+        }
+        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
+            return getWScriptSystem();
+        }
+        else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
+            return getNodeSystem();
+        }
+        else {
+            return undefined;
+        }
+    })();
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.Diagnostics = {
+        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
+        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
+        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
+        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
+        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
+        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
+        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
+        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
+        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
+        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
+        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
+        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
+        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
+        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
+        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
+        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
+        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
+        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
+        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
+        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
+        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
+        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
+        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
+        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
+        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
+        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
+        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
+        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
+        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
+        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
+        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
+        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
+        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
+        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
+        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
+        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
+        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
+        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
+        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
+        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
+        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
+        Type_0_is_not_a_valid_async_function_return_type: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_1055", message: "Type '{0}' is not a valid async function return type." },
+        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
+        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
+        Operand_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "Operand_for_await_does_not_have_a_valid_callable_then_member_1058", message: "Operand for 'await' does not have a valid callable 'then' member." },
+        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: { code: 1059, category: ts.DiagnosticCategory.Error, key: "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059", message: "Return expression in async function does not have a valid callable 'then' member." },
+        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: { code: 1060, category: ts.DiagnosticCategory.Error, key: "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060", message: "Expression body for async arrow function does not have a valid callable 'then' member." },
+        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
+        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
+        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
+        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
+        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
+        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
+        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
+        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
+        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
+        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
+        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher." },
+        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
+        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
+        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
+        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
+        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
+        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
+        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
+        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
+        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
+        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
+        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
+        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
+        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
+        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
+        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
+        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
+        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
+        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
+        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
+        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
+        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
+        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'" },
+        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
+        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
+        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
+        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
+        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
+        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
+        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
+        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
+        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
+        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
+        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
+        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
+        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
+        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
+        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
+        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
+        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
+        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
+        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
+        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
+        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
+        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
+        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
+        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
+        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
+        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
+        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
+        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
+        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
+        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
+        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
+        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
+        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
+        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
+        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
+        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
+        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
+        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
+        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
+        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
+        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
+        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
+        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
+        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
+        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
+        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
+        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
+        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
+        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
+        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
+        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
+        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
+        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
+        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
+        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
+        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
+        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
+        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
+        A_parameter_property_may_not_be_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_a_binding_pattern_1187", message: "A parameter property may not be a binding pattern." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
+        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
+        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
+        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
+        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
+        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
+        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
+        Catch_clause_variable_name_must_be_an_identifier: { code: 1195, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_name_must_be_an_identifier_1195", message: "Catch clause variable name must be an identifier." },
+        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
+        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
+        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
+        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
+        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asteri_1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_defaul_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
+        Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
+        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
+        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
+        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
+        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
+        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
+        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name" },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode" },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
+        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
+        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
+        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
+        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
+        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
+        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
+        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
+        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
+        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
+        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
+        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
+        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
+        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
+        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
+        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
+        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
+        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
+        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
+        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
+        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
+        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
+        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
+        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
+        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
+        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
+        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
+        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
+        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
+        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
+        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
+        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
+        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
+        _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: { code: 1253, category: ts.DiagnosticCategory.Error, key: "_0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag_1253", message: "'{0}' tag cannot be used independently as a top level JSDoc tag." },
+        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
+        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
+        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
+        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
+        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
+        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
+        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
+        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
+        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
+        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
+        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
+        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
+        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
+        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
+        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
+        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
+        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
+        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
+        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
+        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
+        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
+        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
+        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
+        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
+        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
+        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
+        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
+        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
+        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
+        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
+        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
+        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
+        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
+        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
+        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
+        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
+        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
+        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
+        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
+        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
+        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
+        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
+        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
+        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
+        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
+        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
+        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
+        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
+        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
+        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
+        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
+        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
+        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
+        Supplied_parameters_do_not_match_any_signature_of_call_target: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Supplied_parameters_do_not_match_any_signature_of_call_target_2346", message: "Supplied parameters do not match any signature of call target." },
+        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
+        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
+        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_2349", message: "Cannot invoke an expression whose type lacks a call signature." },
+        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
+        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
+        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
+        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
+        No_best_common_type_exists_among_return_expressions: { code: 2354, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_return_expressions_2354", message: "No best common type exists among return expressions." },
+        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
+        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
+        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357", message: "The operand of an increment or decrement operator must be a variable, property or indexer." },
+        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
+        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
+        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
+        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter" },
+        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_of_assignment_expression_2364", message: "Invalid left-hand side of assignment expression." },
+        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
+        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
+        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'" },
+        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
+        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
+        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
+        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
+        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
+        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
+        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
+        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
+        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
+        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
+        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
+        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
+        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
+        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
+        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
+        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
+        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
+        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
+        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
+        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
+        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
+        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
+        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
+        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
+        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
+        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
+        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
+        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
+        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
+        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
+        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
+        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
+        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
+        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
+        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
+        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
+        Invalid_left_hand_side_in_for_in_statement: { code: 2406, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_in_statement_2406", message: "Invalid left-hand side in 'for...in' statement." },
+        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
+        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
+        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class" },
+        All_symbols_within_a_with_block_will_be_resolved_to_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "All_symbols_within_a_with_block_will_be_resolved_to_any_2410", message: "All symbols within a 'with' block will be resolved to 'any'." },
+        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
+        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
+        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
+        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'" },
+        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
+        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
+        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
+        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
+        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
+        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
+        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'" },
+        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
+        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
+        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'" },
+        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
+        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged" },
+        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged" },
+        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
+        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
+        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name" },
+        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'" },
+        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
+        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'" },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
+        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
+        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
+        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
+        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
+        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
+        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
+        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
+        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: { code: 2449, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449", message: "The operand of an increment or decrement operator cannot be a constant or a read-only property." },
+        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450", message: "Left-hand side of assignment expression cannot be a constant or a read-only property." },
+        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
+        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
+        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
+        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
+        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
+        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
+        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'" },
+        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
+        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
+        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
+        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
+        A_rest_element_must_be_last_in_an_array_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462", message: "A rest element must be last in an array destructuring pattern" },
+        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
+        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
+        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
+        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
+        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
+        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
+        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
+        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
+        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
+        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
+        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
+        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
+        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
+        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
+        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
+        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
+        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
+        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
+        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
+        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
+        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'" },
+        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2485, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485", message: "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property." },
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2486, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486", message: "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property." },
+        Invalid_left_hand_side_in_for_of_statement: { code: 2487, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_of_statement_2487", message: "Invalid left-hand side in 'for...of' statement." },
+        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
+        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
+        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
+        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause" },
+        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
+        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
+        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
+        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
+        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
+        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
+        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
+        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
+        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
+        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
+        No_best_common_type_exists_among_yield_expressions: { code: 2504, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_yield_expressions_2504", message: "No best common type exists among yield expressions." },
+        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
+        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
+        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
+        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
+        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
+        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
+        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
+        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
+        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
+        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
+        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
+        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
+        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
+        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
+        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
+        The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_function_expression: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_2522", message: "The 'arguments' object cannot be referenced in an async arrow function. Consider using a standard async function expression." },
+        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
+        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
+        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
+        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
+        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
+        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
+        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
+        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
+        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
+        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
+        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
+        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
+        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
+        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
+        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'" },
+        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
+        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
+        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
+        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property" },
+        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property" },
+        Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: ts.DiagnosticCategory.Error, key: "Cannot_emit_namespaced_JSX_elements_in_React_2650", message: "Cannot emit namespaced JSX elements in React" },
+        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
+        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
+        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
+        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
+        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
+        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element" },
+        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'" },
+        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
+        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
+        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
+        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
+        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
+        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
+        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
+        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
+        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
+        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
+        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
+        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
+        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
+        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
+        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
+        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
+        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
+        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
+        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
+        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: { code: 2679, category: ts.DiagnosticCategory.Error, key: "A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void_2679", message: "A function that is called with the 'new' keyword cannot have a 'this' type that is 'void'." },
+        A_this_parameter_must_be_the_first_parameter: { code: 2680, category: ts.DiagnosticCategory.Error, key: "A_this_parameter_must_be_the_first_parameter_2680", message: "A 'this' parameter must be the first parameter." },
+        A_constructor_cannot_have_a_this_parameter: { code: 2681, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_have_a_this_parameter_2681", message: "A constructor cannot have a 'this' parameter." },
+        get_and_set_accessor_must_have_the_same_this_type: { code: 2682, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_this_type_2682", message: "'get' and 'set' accessor must have the same 'this' type." },
+        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
+        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
+        The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
+        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
+        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
+        Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
+        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4006, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4006", message: "Type parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4008, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4008", message: "Type parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4010, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4010", message: "Type parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4012, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4012", message: "Type parameter '{0}' of public method from exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4014, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", message: "Type parameter '{0}' of method from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4016, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", message: "Type parameter '{0}' of exported function has or is using private name '{1}'." },
+        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4019, category: ts.DiagnosticCategory.Error, key: "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", message: "Implements clause of exported class '{0}' has or is using private name '{1}'." },
+        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
+        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "Extends clause of exported interface '{0}' has or is using private name '{1}'." },
+        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4023, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", message: "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named." },
+        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: { code: 4024, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", message: "Exported variable '{0}' has or is using name '{1}' from private module '{2}'." },
+        Exported_variable_0_has_or_is_using_private_name_1: { code: 4025, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_private_name_1_4025", message: "Exported variable '{0}' has or is using private name '{1}'." },
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4026, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026", message: "Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4027, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4027", message: "Public static property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
+        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4028, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_private_name_1_4028", message: "Public static property '{0}' of exported class has or is using private name '{1}'." },
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4029, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029", message: "Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4030, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4030", message: "Public property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
+        Public_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4031, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_private_name_1_4031", message: "Public property '{0}' of exported class has or is using private name '{1}'." },
+        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4032, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4032", message: "Property '{0}' of exported interface has or is using name '{1}' from private module '{2}'." },
+        Property_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4033, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_private_name_1_4033", message: "Property '{0}' of exported interface has or is using private name '{1}'." },
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4034, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_4034", message: "Parameter '{0}' of public static property setter from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4035, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1_4035", message: "Parameter '{0}' of public static property setter from exported class has or is using private name '{1}'." },
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4036, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_4036", message: "Parameter '{0}' of public property setter from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4037, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1_4037", message: "Parameter '{0}' of public property setter from exported class has or is using private name '{1}'." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4038, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_externa_4038", message: "Return type of public static property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4039, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_4039", message: "Return type of public static property getter from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4040, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0_4040", message: "Return type of public static property getter from exported class has or is using private name '{0}'." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4041, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_modul_4041", message: "Return type of public property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4042, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_4042", message: "Return type of public property getter from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4043, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0_4043", message: "Return type of public property getter from exported class has or is using private name '{0}'." },
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4044, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_mod_4044", message: "Return type of constructor signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4045, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0_4045", message: "Return type of constructor signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4046, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4046", message: "Return type of call signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4047, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0_4047", message: "Return type of call signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4048, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4048", message: "Return type of index signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4049, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0_4049", message: "Return type of index signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4050, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module__4050", message: "Return type of public static method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4051, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4051", message: "Return type of public static method from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: { code: 4052, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0_4052", message: "Return type of public static method from exported class has or is using private name '{0}'." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4053, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_c_4053", message: "Return type of public method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4054, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4054", message: "Return type of public method from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: { code: 4055, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0_4055", message: "Return type of public method from exported class has or is using private name '{0}'." },
+        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4056, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4056", message: "Return type of method from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: { code: 4057, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0_4057", message: "Return type of method from exported interface has or is using private name '{0}'." },
+        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4058, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named_4058", message: "Return type of exported function has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: { code: 4059, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1_4059", message: "Return type of exported function has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_exported_function_has_or_is_using_private_name_0: { code: 4060, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_private_name_0_4060", message: "Return type of exported function has or is using private name '{0}'." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4061, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_can_4061", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4062, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2_4062", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: { code: 4063, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1_4063", message: "Parameter '{0}' of constructor from exported class has or is using private name '{1}'." },
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4064, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_mod_4064", message: "Parameter '{0}' of constructor signature from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4065, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4065", message: "Parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4066, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4066", message: "Parameter '{0}' of call signature from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4067, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4067", message: "Parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4068, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module__4068", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4069, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4069", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4070, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4070", message: "Parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4071, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_c_4071", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4072, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4072", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4073, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4073", message: "Parameter '{0}' of public method from exported class has or is using private name '{1}'." },
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4074, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4074", message: "Parameter '{0}' of method from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4075, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4075", message: "Parameter '{0}' of method from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4076, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4076", message: "Parameter '{0}' of exported function has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: { code: 4077, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2_4077", message: "Parameter '{0}' of exported function has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4078, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", message: "Parameter '{0}' of exported function has or is using private name '{1}'." },
+        Exported_type_alias_0_has_or_is_using_private_name_1: { code: 4081, category: ts.DiagnosticCategory.Error, key: "Exported_type_alias_0_has_or_is_using_private_name_1_4081", message: "Exported type alias '{0}' has or is using private name '{1}'." },
+        Default_export_of_the_module_has_or_is_using_private_name_0: { code: 4082, category: ts.DiagnosticCategory.Error, key: "Default_export_of_the_module_has_or_is_using_private_name_0_4082", message: "Default export of the module has or is using private name '{0}'." },
+        Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict: { code: 4090, category: ts.DiagnosticCategory.Message, key: "Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_t_4090", message: "Conflicting library definitions for '{0}' found at '{1}' and '{2}'. Copy the correct file to the 'typings' folder to resolve this conflict." },
+        The_current_host_does_not_support_the_0_option: { code: 5001, category: ts.DiagnosticCategory.Error, key: "The_current_host_does_not_support_the_0_option_5001", message: "The current host does not support the '{0}' option." },
+        Cannot_find_the_common_subdirectory_path_for_the_input_files: { code: 5009, category: ts.DiagnosticCategory.Error, key: "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", message: "Cannot find the common subdirectory path for the input files." },
+        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}" },
+        Unsupported_file_encoding: { code: 5013, category: ts.DiagnosticCategory.Error, key: "Unsupported_file_encoding_5013", message: "Unsupported file encoding." },
+        Failed_to_parse_file_0_Colon_1: { code: 5014, category: ts.DiagnosticCategory.Error, key: "Failed_to_parse_file_0_Colon_1_5014", message: "Failed to parse file '{0}': {1}." },
+        Unknown_compiler_option_0: { code: 5023, category: ts.DiagnosticCategory.Error, key: "Unknown_compiler_option_0_5023", message: "Unknown compiler option '{0}'." },
+        Compiler_option_0_requires_a_value_of_type_1: { code: 5024, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_requires_a_value_of_type_1_5024", message: "Compiler option '{0}' requires a value of type {1}." },
+        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}" },
+        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: { code: 5042, category: ts.DiagnosticCategory.Error, key: "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", message: "Option 'project' cannot be mixed with source files on a command line." },
+        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: { code: 5047, category: ts.DiagnosticCategory.Error, key: "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", message: "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher." },
+        Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: { code: 5051, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided_5051", message: "Option '{0} can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided." },
+        Option_0_cannot_be_specified_without_specifying_option_1: { code: 5052, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_without_specifying_option_1_5052", message: "Option '{0}' cannot be specified without specifying option '{1}'." },
+        Option_0_cannot_be_specified_with_option_1: { code: 5053, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_with_option_1_5053", message: "Option '{0}' cannot be specified with option '{1}'." },
+        A_tsconfig_json_file_is_already_defined_at_Colon_0: { code: 5054, category: ts.DiagnosticCategory.Error, key: "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", message: "A 'tsconfig.json' file is already defined at: '{0}'." },
+        Cannot_write_file_0_because_it_would_overwrite_input_file: { code: 5055, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", message: "Cannot write file '{0}' because it would overwrite input file." },
+        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: { code: 5056, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", message: "Cannot write file '{0}' because it would be overwritten by multiple input files." },
+        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'" },
+        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'" },
+        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: { code: 5059, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", message: "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier." },
+        Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
+        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
+        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
+        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
+        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
+        Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
+        Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
+        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: { code: 6003, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", message: "Specify the location where debugger should locate map files instead of generated locations." },
+        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: { code: 6004, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations_6004", message: "Specify the location where debugger should locate TypeScript files instead of source locations." },
+        Watch_input_files: { code: 6005, category: ts.DiagnosticCategory.Message, key: "Watch_input_files_6005", message: "Watch input files." },
+        Redirect_output_structure_to_the_directory: { code: 6006, category: ts.DiagnosticCategory.Message, key: "Redirect_output_structure_to_the_directory_6006", message: "Redirect output structure to the directory." },
+        Do_not_erase_const_enum_declarations_in_generated_code: { code: 6007, category: ts.DiagnosticCategory.Message, key: "Do_not_erase_const_enum_declarations_in_generated_code_6007", message: "Do not erase const enum declarations in generated code." },
+        Do_not_emit_outputs_if_any_errors_were_reported: { code: 6008, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_if_any_errors_were_reported_6008", message: "Do not emit outputs if any errors were reported." },
+        Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
+        Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
+        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
+        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
+        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
+        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
+        Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
+        Print_the_compiler_s_version: { code: 6019, category: ts.DiagnosticCategory.Message, key: "Print_the_compiler_s_version_6019", message: "Print the compiler's version." },
+        Compile_the_project_in_the_given_directory: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_in_the_given_directory_6020", message: "Compile the project in the given directory." },
+        Syntax_Colon_0: { code: 6023, category: ts.DiagnosticCategory.Message, key: "Syntax_Colon_0_6023", message: "Syntax: {0}" },
+        options: { code: 6024, category: ts.DiagnosticCategory.Message, key: "options_6024", message: "options" },
+        file: { code: 6025, category: ts.DiagnosticCategory.Message, key: "file_6025", message: "file" },
+        Examples_Colon_0: { code: 6026, category: ts.DiagnosticCategory.Message, key: "Examples_Colon_0_6026", message: "Examples: {0}" },
+        Options_Colon: { code: 6027, category: ts.DiagnosticCategory.Message, key: "Options_Colon_6027", message: "Options:" },
+        Version_0: { code: 6029, category: ts.DiagnosticCategory.Message, key: "Version_0_6029", message: "Version {0}" },
+        Insert_command_line_options_and_files_from_a_file: { code: 6030, category: ts.DiagnosticCategory.Message, key: "Insert_command_line_options_and_files_from_a_file_6030", message: "Insert command line options and files from a file." },
+        File_change_detected_Starting_incremental_compilation: { code: 6032, category: ts.DiagnosticCategory.Message, key: "File_change_detected_Starting_incremental_compilation_6032", message: "File change detected. Starting incremental compilation..." },
+        KIND: { code: 6034, category: ts.DiagnosticCategory.Message, key: "KIND_6034", message: "KIND" },
+        FILE: { code: 6035, category: ts.DiagnosticCategory.Message, key: "FILE_6035", message: "FILE" },
+        VERSION: { code: 6036, category: ts.DiagnosticCategory.Message, key: "VERSION_6036", message: "VERSION" },
+        LOCATION: { code: 6037, category: ts.DiagnosticCategory.Message, key: "LOCATION_6037", message: "LOCATION" },
+        DIRECTORY: { code: 6038, category: ts.DiagnosticCategory.Message, key: "DIRECTORY_6038", message: "DIRECTORY" },
+        Compilation_complete_Watching_for_file_changes: { code: 6042, category: ts.DiagnosticCategory.Message, key: "Compilation_complete_Watching_for_file_changes_6042", message: "Compilation complete. Watching for file changes." },
+        Generates_corresponding_map_file: { code: 6043, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_map_file_6043", message: "Generates corresponding '.map' file." },
+        Compiler_option_0_expects_an_argument: { code: 6044, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_expects_an_argument_6044", message: "Compiler option '{0}' expects an argument." },
+        Unterminated_quoted_string_in_response_file_0: { code: 6045, category: ts.DiagnosticCategory.Error, key: "Unterminated_quoted_string_in_response_file_0_6045", message: "Unterminated quoted string in response file '{0}'." },
+        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}" },
+        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: { code: 6048, category: ts.DiagnosticCategory.Error, key: "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", message: "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'." },
+        Unsupported_locale_0: { code: 6049, category: ts.DiagnosticCategory.Error, key: "Unsupported_locale_0_6049", message: "Unsupported locale '{0}'." },
+        Unable_to_open_file_0: { code: 6050, category: ts.DiagnosticCategory.Error, key: "Unable_to_open_file_0_6050", message: "Unable to open file '{0}'." },
+        Corrupted_locale_file_0: { code: 6051, category: ts.DiagnosticCategory.Error, key: "Corrupted_locale_file_0_6051", message: "Corrupted locale file {0}." },
+        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: { code: 6052, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_expressions_and_declarations_with_an_implied_any_type_6052", message: "Raise error on expressions and declarations with an implied 'any' type." },
+        File_0_not_found: { code: 6053, category: ts.DiagnosticCategory.Error, key: "File_0_not_found_6053", message: "File '{0}' not found." },
+        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: { code: 6054, category: ts.DiagnosticCategory.Error, key: "File_0_has_unsupported_extension_The_only_supported_extensions_are_1_6054", message: "File '{0}' has unsupported extension. The only supported extensions are {1}." },
+        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: { code: 6055, category: ts.DiagnosticCategory.Message, key: "Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures_6055", message: "Suppress noImplicitAny errors for indexing objects lacking index signatures." },
+        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: { code: 6056, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_declarations_for_code_that_has_an_internal_annotation_6056", message: "Do not emit declarations for code that has an '@internal' annotation." },
+        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: { code: 6058, category: ts.DiagnosticCategory.Message, key: "Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir_6058", message: "Specify the root directory of input files. Use to control the output directory structure with --outDir." },
+        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: { code: 6059, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files_6059", message: "File '{0}' is not under 'rootDir' '{1}'. 'rootDir' is expected to contain all source files." },
+        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: { code: 6060, category: ts.DiagnosticCategory.Message, key: "Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix_6060", message: "Specify the end of line sequence to be used when emitting files: 'CRLF' (dos) or 'LF' (unix)." },
+        NEWLINE: { code: 6061, category: ts.DiagnosticCategory.Message, key: "NEWLINE_6061", message: "NEWLINE" },
+        Option_0_can_only_be_specified_in_tsconfig_json_file: { code: 6064, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_specified_in_tsconfig_json_file_6064", message: "Option '{0}' can only be specified in 'tsconfig.json' file." },
+        Enables_experimental_support_for_ES7_decorators: { code: 6065, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_decorators_6065", message: "Enables experimental support for ES7 decorators." },
+        Enables_experimental_support_for_emitting_type_metadata_for_decorators: { code: 6066, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_emitting_type_metadata_for_decorators_6066", message: "Enables experimental support for emitting type metadata for decorators." },
+        Enables_experimental_support_for_ES7_async_functions: { code: 6068, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_async_functions_6068", message: "Enables experimental support for ES7 async functions." },
+        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: { code: 6069, category: ts.DiagnosticCategory.Message, key: "Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6_6069", message: "Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6)." },
+        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: { code: 6070, category: ts.DiagnosticCategory.Message, key: "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", message: "Initializes a TypeScript project and creates a tsconfig.json file." },
+        Successfully_created_a_tsconfig_json_file: { code: 6071, category: ts.DiagnosticCategory.Message, key: "Successfully_created_a_tsconfig_json_file_6071", message: "Successfully created a tsconfig.json file." },
+        Suppress_excess_property_checks_for_object_literals: { code: 6072, category: ts.DiagnosticCategory.Message, key: "Suppress_excess_property_checks_for_object_literals_6072", message: "Suppress excess property checks for object literals." },
+        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context. (experimental)" },
+        Do_not_report_errors_on_unused_labels: { code: 6074, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unused_labels_6074", message: "Do not report errors on unused labels." },
+        Report_error_when_not_all_code_paths_in_function_return_a_value: { code: 6075, category: ts.DiagnosticCategory.Message, key: "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", message: "Report error when not all code paths in function return a value." },
+        Report_errors_for_fallthrough_cases_in_switch_statement: { code: 6076, category: ts.DiagnosticCategory.Message, key: "Report_errors_for_fallthrough_cases_in_switch_statement_6076", message: "Report errors for fallthrough cases in switch statement." },
+        Do_not_report_errors_on_unreachable_code: { code: 6077, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unreachable_code_6077", message: "Do not report errors on unreachable code." },
+        Disallow_inconsistently_cased_references_to_the_same_file: { code: 6078, category: ts.DiagnosticCategory.Message, key: "Disallow_inconsistently_cased_references_to_the_same_file_6078", message: "Disallow inconsistently-cased references to the same file." },
+        Specify_library_files_to_be_included_in_the_compilation_Colon: { code: 6079, category: ts.DiagnosticCategory.Message, key: "Specify_library_files_to_be_included_in_the_compilation_Colon_6079", message: "Specify library files to be included in the compilation: " },
+        Specify_JSX_code_generation_Colon_preserve_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_or_react_6080", message: "Specify JSX code generation: 'preserve' or 'react'" },
+        Only_amd_and_system_modules_are_supported_alongside_0: { code: 6082, category: ts.DiagnosticCategory.Error, key: "Only_amd_and_system_modules_are_supported_alongside_0_6082", message: "Only 'amd' and 'system' modules are supported alongside --{0}." },
+        Base_directory_to_resolve_non_absolute_module_names: { code: 6083, category: ts.DiagnosticCategory.Message, key: "Base_directory_to_resolve_non_absolute_module_names_6083", message: "Base directory to resolve non-absolute module names." },
+        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084", message: "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit" },
+        Enable_tracing_of_the_name_resolution_process: { code: 6085, category: ts.DiagnosticCategory.Message, key: "Enable_tracing_of_the_name_resolution_process_6085", message: "Enable tracing of the name resolution process." },
+        Resolving_module_0_from_1: { code: 6086, category: ts.DiagnosticCategory.Message, key: "Resolving_module_0_from_1_6086", message: "======== Resolving module '{0}' from '{1}'. ========" },
+        Explicitly_specified_module_resolution_kind_Colon_0: { code: 6087, category: ts.DiagnosticCategory.Message, key: "Explicitly_specified_module_resolution_kind_Colon_0_6087", message: "Explicitly specified module resolution kind: '{0}'." },
+        Module_resolution_kind_is_not_specified_using_0: { code: 6088, category: ts.DiagnosticCategory.Message, key: "Module_resolution_kind_is_not_specified_using_0_6088", message: "Module resolution kind is not specified, using '{0}'." },
+        Module_name_0_was_successfully_resolved_to_1: { code: 6089, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_successfully_resolved_to_1_6089", message: "======== Module name '{0}' was successfully resolved to '{1}'. ========" },
+        Module_name_0_was_not_resolved: { code: 6090, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_not_resolved_6090", message: "======== Module name '{0}' was not resolved. ========" },
+        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: { code: 6091, category: ts.DiagnosticCategory.Message, key: "paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0_6091", message: "'paths' option is specified, looking for a pattern to match module name '{0}'." },
+        Module_name_0_matched_pattern_1: { code: 6092, category: ts.DiagnosticCategory.Message, key: "Module_name_0_matched_pattern_1_6092", message: "Module name '{0}', matched pattern '{1}'." },
+        Trying_substitution_0_candidate_module_location_Colon_1: { code: 6093, category: ts.DiagnosticCategory.Message, key: "Trying_substitution_0_candidate_module_location_Colon_1_6093", message: "Trying substitution '{0}', candidate module location: '{1}'." },
+        Resolving_module_name_0_relative_to_base_url_1_2: { code: 6094, category: ts.DiagnosticCategory.Message, key: "Resolving_module_name_0_relative_to_base_url_1_2_6094", message: "Resolving module name '{0}' relative to base url '{1}' - '{2}'." },
+        Loading_module_as_file_Slash_folder_candidate_module_location_0: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095", message: "Loading module as file / folder, candidate module location '{0}'." },
+        File_0_does_not_exist: { code: 6096, category: ts.DiagnosticCategory.Message, key: "File_0_does_not_exist_6096", message: "File '{0}' does not exist." },
+        File_0_exist_use_it_as_a_name_resolution_result: { code: 6097, category: ts.DiagnosticCategory.Message, key: "File_0_exist_use_it_as_a_name_resolution_result_6097", message: "File '{0}' exist - use it as a name resolution result." },
+        Loading_module_0_from_node_modules_folder: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_6098", message: "Loading module '{0}' from 'node_modules' folder." },
+        Found_package_json_at_0: { code: 6099, category: ts.DiagnosticCategory.Message, key: "Found_package_json_at_0_6099", message: "Found 'package.json' at '{0}'." },
+        package_json_does_not_have_types_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_types_field_6100", message: "'package.json' does not have 'types' field." },
+        package_json_has_0_field_1_that_references_2: { code: 6101, category: ts.DiagnosticCategory.Message, key: "package_json_has_0_field_1_that_references_2_6101", message: "'package.json' has '{0}' field '{1}' that references '{2}'." },
+        Allow_javascript_files_to_be_compiled: { code: 6102, category: ts.DiagnosticCategory.Message, key: "Allow_javascript_files_to_be_compiled_6102", message: "Allow javascript files to be compiled." },
+        Option_0_should_have_array_of_strings_as_a_value: { code: 6103, category: ts.DiagnosticCategory.Error, key: "Option_0_should_have_array_of_strings_as_a_value_6103", message: "Option '{0}' should have array of strings as a value." },
+        Checking_if_0_is_the_longest_matching_prefix_for_1_2: { code: 6104, category: ts.DiagnosticCategory.Message, key: "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", message: "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'." },
+        Expected_type_of_0_field_in_package_json_to_be_string_got_1: { code: 6105, category: ts.DiagnosticCategory.Message, key: "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", message: "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'." },
+        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'" },
+        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'" },
+        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'" },
+        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'" },
+        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'" },
+        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed" },
+        Do_not_emit_use_strict_directives_in_module_output: { code: 6112, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_use_strict_directives_in_module_output_6112", message: "Do not emit 'use strict' directives in module output." },
+        Enable_strict_null_checks: { code: 6113, category: ts.DiagnosticCategory.Message, key: "Enable_strict_null_checks_6113", message: "Enable strict null checks." },
+        Unknown_option_excludes_Did_you_mean_exclude: { code: 6114, category: ts.DiagnosticCategory.Error, key: "Unknown_option_excludes_Did_you_mean_exclude_6114", message: "Unknown option 'excludes'. Did you mean 'exclude'?" },
+        Raise_error_on_this_expressions_with_an_implied_any_type: { code: 6115, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_this_expressions_with_an_implied_any_type_6115", message: "Raise error on 'this' expressions with an implied 'any' type." },
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: { code: 6116, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_2_6116", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory '{2}'. ========" },
+        Resolving_using_primary_search_paths: { code: 6117, category: ts.DiagnosticCategory.Message, key: "Resolving_using_primary_search_paths_6117", message: "Resolving using primary search paths..." },
+        Resolving_from_node_modules_folder: { code: 6118, category: ts.DiagnosticCategory.Message, key: "Resolving_from_node_modules_folder_6118", message: "Resolving from node_modules folder..." },
+        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: { code: 6119, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", message: "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========" },
+        Type_reference_directive_0_was_not_resolved: { code: 6120, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_not_resolved_6120", message: "======== Type reference directive '{0}' was not resolved. ========" },
+        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'" },
+        Root_directory_cannot_be_determined_skipping_primary_search_paths: { code: 6122, category: ts.DiagnosticCategory.Message, key: "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", message: "Root directory cannot be determined, skipping primary search paths." },
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: { code: 6123, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========" },
+        Type_declaration_files_to_be_included_in_compilation: { code: 6124, category: ts.DiagnosticCategory.Message, key: "Type_declaration_files_to_be_included_in_compilation_6124", message: "Type declaration files to be included in compilation." },
+        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'" },
+        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: { code: 6126, category: ts.DiagnosticCategory.Message, key: "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", message: "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder." },
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: { code: 6127, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", message: "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========" },
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
+        The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
+        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
+        File_name_0_has_a_1_extension_stripping_it: { code: 6132, category: ts.DiagnosticCategory.Message, key: "File_name_0_has_a_1_extension_stripping_it_6132", message: "File name '{0}' has a '{1}' extension - stripping it" },
+        Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
+        Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
+        Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
+        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: { code: 7009, category: ts.DiagnosticCategory.Error, key: "new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type_7009", message: "'new' expression, whose target lacks a construct signature, implicitly has an 'any' type." },
+        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: { code: 7010, category: ts.DiagnosticCategory.Error, key: "_0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type_7010", message: "'{0}', which lacks return-type annotation, implicitly has an '{1}' return type." },
+        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: { code: 7011, category: ts.DiagnosticCategory.Error, key: "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", message: "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type." },
+        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7013, category: ts.DiagnosticCategory.Error, key: "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", message: "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type." },
+        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: { code: 7015, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", message: "Element implicitly has an 'any' type because index expression is not of type 'number'." },
+        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation: { code: 7016, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation_7016", message: "Property '{0}' implicitly has type 'any', because its 'set' accessor lacks a type annotation." },
+        Index_signature_of_object_type_implicitly_has_an_any_type: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Index_signature_of_object_type_implicitly_has_an_any_type_7017", message: "Index signature of object type implicitly has an 'any' type." },
+        Object_literal_s_property_0_implicitly_has_an_1_type: { code: 7018, category: ts.DiagnosticCategory.Error, key: "Object_literal_s_property_0_implicitly_has_an_1_type_7018", message: "Object literal's property '{0}' implicitly has an '{1}' type." },
+        Rest_parameter_0_implicitly_has_an_any_type: { code: 7019, category: ts.DiagnosticCategory.Error, key: "Rest_parameter_0_implicitly_has_an_any_type_7019", message: "Rest parameter '{0}' implicitly has an 'any[]' type." },
+        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7020, category: ts.DiagnosticCategory.Error, key: "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", message: "Call signature, which lacks return-type annotation, implicitly has an 'any' return type." },
+        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: { code: 7022, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or__7022", message: "'{0}' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer." },
+        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7023, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", message: "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
+        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7024, category: ts.DiagnosticCategory.Error, key: "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", message: "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
+        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: { code: 7025, category: ts.DiagnosticCategory.Error, key: "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", message: "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type." },
+        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists" },
+        Unreachable_code_detected: { code: 7027, category: ts.DiagnosticCategory.Error, key: "Unreachable_code_detected_7027", message: "Unreachable code detected." },
+        Unused_label: { code: 7028, category: ts.DiagnosticCategory.Error, key: "Unused_label_7028", message: "Unused label." },
+        Fallthrough_case_in_switch: { code: 7029, category: ts.DiagnosticCategory.Error, key: "Fallthrough_case_in_switch_7029", message: "Fallthrough case in switch." },
+        Not_all_code_paths_return_a_value: { code: 7030, category: ts.DiagnosticCategory.Error, key: "Not_all_code_paths_return_a_value_7030", message: "Not all code paths return a value." },
+        Binding_element_0_implicitly_has_an_1_type: { code: 7031, category: ts.DiagnosticCategory.Error, key: "Binding_element_0_implicitly_has_an_1_type_7031", message: "Binding element '{0}' implicitly has an '{1}' type." },
+        You_cannot_rename_this_element: { code: 8000, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_this_element_8000", message: "You cannot rename this element." },
+        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: { code: 8001, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", message: "You cannot rename elements that are defined in the standard TypeScript library." },
+        import_can_only_be_used_in_a_ts_file: { code: 8002, category: ts.DiagnosticCategory.Error, key: "import_can_only_be_used_in_a_ts_file_8002", message: "'import ... =' can only be used in a .ts file." },
+        export_can_only_be_used_in_a_ts_file: { code: 8003, category: ts.DiagnosticCategory.Error, key: "export_can_only_be_used_in_a_ts_file_8003", message: "'export=' can only be used in a .ts file." },
+        type_parameter_declarations_can_only_be_used_in_a_ts_file: { code: 8004, category: ts.DiagnosticCategory.Error, key: "type_parameter_declarations_can_only_be_used_in_a_ts_file_8004", message: "'type parameter declarations' can only be used in a .ts file." },
+        implements_clauses_can_only_be_used_in_a_ts_file: { code: 8005, category: ts.DiagnosticCategory.Error, key: "implements_clauses_can_only_be_used_in_a_ts_file_8005", message: "'implements clauses' can only be used in a .ts file." },
+        interface_declarations_can_only_be_used_in_a_ts_file: { code: 8006, category: ts.DiagnosticCategory.Error, key: "interface_declarations_can_only_be_used_in_a_ts_file_8006", message: "'interface declarations' can only be used in a .ts file." },
+        module_declarations_can_only_be_used_in_a_ts_file: { code: 8007, category: ts.DiagnosticCategory.Error, key: "module_declarations_can_only_be_used_in_a_ts_file_8007", message: "'module declarations' can only be used in a .ts file." },
+        type_aliases_can_only_be_used_in_a_ts_file: { code: 8008, category: ts.DiagnosticCategory.Error, key: "type_aliases_can_only_be_used_in_a_ts_file_8008", message: "'type aliases' can only be used in a .ts file." },
+        _0_can_only_be_used_in_a_ts_file: { code: 8009, category: ts.DiagnosticCategory.Error, key: "_0_can_only_be_used_in_a_ts_file_8009", message: "'{0}' can only be used in a .ts file." },
+        types_can_only_be_used_in_a_ts_file: { code: 8010, category: ts.DiagnosticCategory.Error, key: "types_can_only_be_used_in_a_ts_file_8010", message: "'types' can only be used in a .ts file." },
+        type_arguments_can_only_be_used_in_a_ts_file: { code: 8011, category: ts.DiagnosticCategory.Error, key: "type_arguments_can_only_be_used_in_a_ts_file_8011", message: "'type arguments' can only be used in a .ts file." },
+        parameter_modifiers_can_only_be_used_in_a_ts_file: { code: 8012, category: ts.DiagnosticCategory.Error, key: "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", message: "'parameter modifiers' can only be used in a .ts file." },
+        property_declarations_can_only_be_used_in_a_ts_file: { code: 8014, category: ts.DiagnosticCategory.Error, key: "property_declarations_can_only_be_used_in_a_ts_file_8014", message: "'property declarations' can only be used in a .ts file." },
+        enum_declarations_can_only_be_used_in_a_ts_file: { code: 8015, category: ts.DiagnosticCategory.Error, key: "enum_declarations_can_only_be_used_in_a_ts_file_8015", message: "'enum declarations' can only be used in a .ts file." },
+        type_assertion_expressions_can_only_be_used_in_a_ts_file: { code: 8016, category: ts.DiagnosticCategory.Error, key: "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", message: "'type assertion expressions' can only be used in a .ts file." },
+        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses." },
+        class_expressions_are_not_currently_supported: { code: 9003, category: ts.DiagnosticCategory.Error, key: "class_expressions_are_not_currently_supported_9003", message: "'class' expressions are not currently supported." },
+        JSX_attributes_must_only_be_assigned_a_non_empty_expression: { code: 17000, category: ts.DiagnosticCategory.Error, key: "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", message: "JSX attributes must only be assigned a non-empty 'expression'." },
+        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: { code: 17001, category: ts.DiagnosticCategory.Error, key: "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", message: "JSX elements cannot have multiple attributes with the same name." },
+        Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: ts.DiagnosticCategory.Error, key: "Expected_corresponding_JSX_closing_tag_for_0_17002", message: "Expected corresponding JSX closing tag for '{0}'." },
+        JSX_attribute_expected: { code: 17003, category: ts.DiagnosticCategory.Error, key: "JSX_attribute_expected_17003", message: "JSX attribute expected." },
+        Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: ts.DiagnosticCategory.Error, key: "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", message: "Cannot use JSX unless the '--jsx' flag is provided." },
+        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'" },
+        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17006, category: ts.DiagnosticCategory.Error, key: "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", message: "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
+        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17007, category: ts.DiagnosticCategory.Error, key: "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", message: "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
+        JSX_element_0_has_no_corresponding_closing_tag: { code: 17008, category: ts.DiagnosticCategory.Error, key: "JSX_element_0_has_no_corresponding_closing_tag_17008", message: "JSX element '{0}' has no corresponding closing tag." },
+        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: { code: 17009, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", message: "'super' must be called before accessing 'this' in the constructor of a derived class." },
+        Unknown_typing_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_typing_option_0_17010", message: "Unknown typing option '{0}'." }
+    };
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function tokenIsIdentifierOrKeyword(token) {
+        return token >= 69;
+    }
+    ts.tokenIsIdentifierOrKeyword = tokenIsIdentifierOrKeyword;
+    var textToToken = {
+        "abstract": 115,
+        "any": 117,
+        "as": 116,
+        "boolean": 120,
+        "break": 70,
+        "case": 71,
+        "catch": 72,
+        "class": 73,
+        "continue": 75,
+        "const": 74,
+        "constructor": 121,
+        "debugger": 76,
+        "declare": 122,
+        "default": 77,
+        "delete": 78,
+        "do": 79,
+        "else": 80,
+        "enum": 81,
+        "export": 82,
+        "extends": 83,
+        "false": 84,
+        "finally": 85,
+        "for": 86,
+        "from": 136,
+        "function": 87,
+        "get": 123,
+        "if": 88,
+        "implements": 106,
+        "import": 89,
+        "in": 90,
+        "instanceof": 91,
+        "interface": 107,
+        "is": 124,
+        "let": 108,
+        "module": 125,
+        "namespace": 126,
+        "never": 127,
+        "new": 92,
+        "null": 93,
+        "number": 130,
+        "package": 109,
+        "private": 110,
+        "protected": 111,
+        "public": 112,
+        "readonly": 128,
+        "require": 129,
+        "global": 137,
+        "return": 94,
+        "set": 131,
+        "static": 113,
+        "string": 132,
+        "super": 95,
+        "switch": 96,
+        "symbol": 133,
+        "this": 97,
+        "throw": 98,
+        "true": 99,
+        "try": 100,
+        "type": 134,
+        "typeof": 101,
+        "undefined": 135,
+        "var": 102,
+        "void": 103,
+        "while": 104,
+        "with": 105,
+        "yield": 114,
+        "async": 118,
+        "await": 119,
+        "of": 138,
+        "{": 15,
+        "}": 16,
+        "(": 17,
+        ")": 18,
+        "[": 19,
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+        ".": 21,
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+        "!=": 31,
+        "===": 32,
+        "!==": 33,
+        "=>": 34,
+        "+": 35,
+        "-": 36,
+        "**": 38,
+        "*": 37,
+        "/": 39,
+        "%": 40,
+        "++": 41,
+        "--": 42,
+        "<<": 43,
+        "</": 26,
+        ">>": 44,
+        ">>>": 45,
+        "&": 46,
+        "|": 47,
+        "^": 48,
+        "!": 49,
+        "~": 50,
+        "&&": 51,
+        "||": 52,
+        "?": 53,
+        ":": 54,
+        "=": 56,
+        "+=": 57,
+        "-=": 58,
+        "*=": 59,
+        "**=": 60,
+        "/=": 61,
+        "%=": 62,
+        "<<=": 63,
+        ">>=": 64,
+        ">>>=": 65,
+        "&=": 66,
+        "|=": 67,
+        "^=": 68,
+        "@": 55
+    };
+    var unicodeES3IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1610, 1649, 1747, 1749, 1749, 1765, 1766, 1786, 1788, 1808, 1808, 1810, 1836, 1920, 1957, 2309, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2784, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3294, 3294, 3296, 3297, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3424, 3425, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3805, 3840, 3840, 3904, 3911, 3913, 3946, 3976, 3979, 4096, 4129, 4131, 4135, 4137, 4138, 4176, 4181, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6067, 6176, 6263, 6272, 6312, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8319, 8319, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12346, 12353, 12436, 12445, 12446, 12449, 12538, 12540, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65138, 65140, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
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3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272, 6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    function lookupInUnicodeMap(code, map) {
+        if (code < map[0]) {
+            return false;
+        }
+        var lo = 0;
+        var hi = map.length;
+        var mid;
+        while (lo + 1 < hi) {
+            mid = lo + (hi - lo) / 2;
+            mid -= mid % 2;
+            if (map[mid] <= code && code <= map[mid + 1]) {
+                return true;
+            }
+            if (code < map[mid]) {
+                hi = mid;
+            }
+            else {
+                lo = mid + 2;
+            }
+        }
+        return false;
+    }
+    function isUnicodeIdentifierStart(code, languageVersion) {
+        return languageVersion >= 1 ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
+    }
+    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
+    function isUnicodeIdentifierPart(code, languageVersion) {
+        return languageVersion >= 1 ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
+    }
+    function makeReverseMap(source) {
+        var result = [];
+        for (var name_4 in source) {
+            if (source.hasOwnProperty(name_4)) {
+                result[source[name_4]] = name_4;
+            }
+        }
+        return result;
+    }
+    var tokenStrings = makeReverseMap(textToToken);
+    function tokenToString(t) {
+        return tokenStrings[t];
+    }
+    ts.tokenToString = tokenToString;
+    function stringToToken(s) {
+        return textToToken[s];
+    }
+    ts.stringToToken = stringToToken;
+    function computeLineStarts(text) {
+        var result = new Array();
+        var pos = 0;
+        var lineStart = 0;
+        while (pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 13:
+                    if (text.charCodeAt(pos) === 10) {
+                        pos++;
+                    }
+                case 10:
+                    result.push(lineStart);
+                    lineStart = pos;
+                    break;
+                default:
+                    if (ch > 127 && isLineBreak(ch)) {
+                        result.push(lineStart);
+                        lineStart = pos;
+                    }
+                    break;
+            }
+        }
+        result.push(lineStart);
+        return result;
+    }
+    ts.computeLineStarts = computeLineStarts;
+    function getPositionOfLineAndCharacter(sourceFile, line, character) {
+        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
+    }
+    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
+    function computePositionOfLineAndCharacter(lineStarts, line, character) {
+        ts.Debug.assert(line >= 0 && line < lineStarts.length);
+        return lineStarts[line] + character;
+    }
+    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
+    function getLineStarts(sourceFile) {
+        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
+    }
+    ts.getLineStarts = getLineStarts;
+    function computeLineAndCharacterOfPosition(lineStarts, position) {
+        var lineNumber = ts.binarySearch(lineStarts, position);
+        if (lineNumber < 0) {
+            lineNumber = ~lineNumber - 1;
+            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
+        }
+        return {
+            line: lineNumber,
+            character: position - lineStarts[lineNumber]
+        };
+    }
+    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
+    function getLineAndCharacterOfPosition(sourceFile, position) {
+        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
+    }
+    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
+    var hasOwnProperty = Object.prototype.hasOwnProperty;
+    function isWhiteSpace(ch) {
+        return ch === 32 ||
+            ch === 9 ||
+            ch === 11 ||
+            ch === 12 ||
+            ch === 160 ||
+            ch === 133 ||
+            ch === 5760 ||
+            ch >= 8192 && ch <= 8203 ||
+            ch === 8239 ||
+            ch === 8287 ||
+            ch === 12288 ||
+            ch === 65279;
+    }
+    ts.isWhiteSpace = isWhiteSpace;
+    function isLineBreak(ch) {
+        return ch === 10 ||
+            ch === 13 ||
+            ch === 8232 ||
+            ch === 8233;
+    }
+    ts.isLineBreak = isLineBreak;
+    function isDigit(ch) {
+        return ch >= 48 && ch <= 57;
+    }
+    function isOctalDigit(ch) {
+        return ch >= 48 && ch <= 55;
+    }
+    ts.isOctalDigit = isOctalDigit;
+    function couldStartTrivia(text, pos) {
+        var ch = text.charCodeAt(pos);
+        switch (ch) {
+            case 13:
+            case 10:
+            case 9:
+            case 11:
+            case 12:
+            case 32:
+            case 47:
+            case 60:
+            case 61:
+            case 62:
+                return true;
+            case 35:
+                return pos === 0;
+            default:
+                return ch > 127;
+        }
+    }
+    ts.couldStartTrivia = couldStartTrivia;
+    function skipTrivia(text, pos, stopAfterLineBreak, stopAtComments) {
+        if (stopAtComments === void 0) { stopAtComments = false; }
+        if (!(pos >= 0)) {
+            return pos;
+        }
+        while (true) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13:
+                    if (text.charCodeAt(pos + 1) === 10) {
+                        pos++;
+                    }
+                case 10:
+                    pos++;
+                    if (stopAfterLineBreak) {
+                        return pos;
+                    }
+                    continue;
+                case 9:
+                case 11:
+                case 12:
+                case 32:
+                    pos++;
+                    continue;
+                case 47:
+                    if (stopAtComments) {
+                        break;
+                    }
+                    if (text.charCodeAt(pos + 1) === 47) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (isLineBreak(text.charCodeAt(pos))) {
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    if (text.charCodeAt(pos + 1) === 42) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
+                                pos += 2;
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    break;
+                case 60:
+                case 61:
+                case 62:
+                    if (isConflictMarkerTrivia(text, pos)) {
+                        pos = scanConflictMarkerTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                case 35:
+                    if (pos === 0 && isShebangTrivia(text, pos)) {
+                        pos = scanShebangTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                default:
+                    if (ch > 127 && (isWhiteSpace(ch) || isLineBreak(ch))) {
+                        pos++;
+                        continue;
+                    }
+                    break;
+            }
+            return pos;
+        }
+    }
+    ts.skipTrivia = skipTrivia;
+    var mergeConflictMarkerLength = "<<<<<<<".length;
+    function isConflictMarkerTrivia(text, pos) {
+        ts.Debug.assert(pos >= 0);
+        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
+            var ch = text.charCodeAt(pos);
+            if ((pos + mergeConflictMarkerLength) < text.length) {
+                for (var i = 0, n = mergeConflictMarkerLength; i < n; i++) {
+                    if (text.charCodeAt(pos + i) !== ch) {
+                        return false;
+                    }
+                }
+                return ch === 61 ||
+                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32;
+            }
+        }
+        return false;
+    }
+    function scanConflictMarkerTrivia(text, pos, error) {
+        if (error) {
+            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
+        }
+        var ch = text.charCodeAt(pos);
+        var len = text.length;
+        if (ch === 60 || ch === 62) {
+            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
+                pos++;
+            }
+        }
+        else {
+            ts.Debug.assert(ch === 61);
+            while (pos < len) {
+                var ch_1 = text.charCodeAt(pos);
+                if (ch_1 === 62 && isConflictMarkerTrivia(text, pos)) {
+                    break;
+                }
+                pos++;
+            }
+        }
+        return pos;
+    }
+    var shebangTriviaRegex = /^#!.*/;
+    function isShebangTrivia(text, pos) {
+        ts.Debug.assert(pos === 0);
+        return shebangTriviaRegex.test(text);
+    }
+    function scanShebangTrivia(text, pos) {
+        var shebang = shebangTriviaRegex.exec(text)[0];
+        pos = pos + shebang.length;
+        return pos;
+    }
+    function getCommentRanges(text, pos, trailing) {
+        var result;
+        var collecting = trailing || pos === 0;
+        while (pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13:
+                    if (text.charCodeAt(pos + 1) === 10) {
+                        pos++;
+                    }
+                case 10:
+                    pos++;
+                    if (trailing) {
+                        return result;
+                    }
+                    collecting = true;
+                    if (result && result.length) {
+                        ts.lastOrUndefined(result).hasTrailingNewLine = true;
+                    }
+                    continue;
+                case 9:
+                case 11:
+                case 12:
+                case 32:
+                    pos++;
+                    continue;
+                case 47:
+                    var nextChar = text.charCodeAt(pos + 1);
+                    var hasTrailingNewLine = false;
+                    if (nextChar === 47 || nextChar === 42) {
+                        var kind = nextChar === 47 ? 2 : 3;
+                        var startPos = pos;
+                        pos += 2;
+                        if (nextChar === 47) {
+                            while (pos < text.length) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    hasTrailingNewLine = true;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        else {
+                            while (pos < text.length) {
+                                if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
+                                    pos += 2;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        if (collecting) {
+                            if (!result) {
+                                result = [];
+                            }
+                            result.push({ pos: startPos, end: pos, hasTrailingNewLine: hasTrailingNewLine, kind: kind });
+                        }
+                        continue;
+                    }
+                    break;
+                default:
+                    if (ch > 127 && (isWhiteSpace(ch) || isLineBreak(ch))) {
+                        if (result && result.length && isLineBreak(ch)) {
+                            ts.lastOrUndefined(result).hasTrailingNewLine = true;
+                        }
+                        pos++;
+                        continue;
+                    }
+                    break;
+            }
+            return result;
+        }
+        return result;
+    }
+    function getLeadingCommentRanges(text, pos) {
+        return getCommentRanges(text, pos, false);
+    }
+    ts.getLeadingCommentRanges = getLeadingCommentRanges;
+    function getTrailingCommentRanges(text, pos) {
+        return getCommentRanges(text, pos, true);
+    }
+    ts.getTrailingCommentRanges = getTrailingCommentRanges;
+    function getShebang(text) {
+        return shebangTriviaRegex.test(text)
+            ? shebangTriviaRegex.exec(text)[0]
+            : undefined;
+    }
+    ts.getShebang = getShebang;
+    function isIdentifierStart(ch, languageVersion) {
+        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
+            ch === 36 || ch === 95 ||
+            ch > 127 && isUnicodeIdentifierStart(ch, languageVersion);
+    }
+    ts.isIdentifierStart = isIdentifierStart;
+    function isIdentifierPart(ch, languageVersion) {
+        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
+            ch >= 48 && ch <= 57 || ch === 36 || ch === 95 ||
+            ch > 127 && isUnicodeIdentifierPart(ch, languageVersion);
+    }
+    ts.isIdentifierPart = isIdentifierPart;
+    function isIdentifier(name, languageVersion) {
+        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
+            return false;
+        }
+        for (var i = 1, n = name.length; i < n; i++) {
+            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.isIdentifier = isIdentifier;
+    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
+        if (languageVariant === void 0) { languageVariant = 0; }
+        var pos;
+        var end;
+        var startPos;
+        var tokenPos;
+        var token;
+        var tokenValue;
+        var precedingLineBreak;
+        var hasExtendedUnicodeEscape;
+        var tokenIsUnterminated;
+        setText(text, start, length);
+        return {
+            getStartPos: function () { return startPos; },
+            getTextPos: function () { return pos; },
+            getToken: function () { return token; },
+            getTokenPos: function () { return tokenPos; },
+            getTokenText: function () { return text.substring(tokenPos, pos); },
+            getTokenValue: function () { return tokenValue; },
+            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
+            hasPrecedingLineBreak: function () { return precedingLineBreak; },
+            isIdentifier: function () { return token === 69 || token > 105; },
+            isReservedWord: function () { return token >= 70 && token <= 105; },
+            isUnterminated: function () { return tokenIsUnterminated; },
+            reScanGreaterToken: reScanGreaterToken,
+            reScanSlashToken: reScanSlashToken,
+            reScanTemplateToken: reScanTemplateToken,
+            scanJsxIdentifier: scanJsxIdentifier,
+            reScanJsxToken: reScanJsxToken,
+            scanJsxToken: scanJsxToken,
+            scanJSDocToken: scanJSDocToken,
+            scan: scan,
+            setText: setText,
+            setScriptTarget: setScriptTarget,
+            setLanguageVariant: setLanguageVariant,
+            setOnError: setOnError,
+            setTextPos: setTextPos,
+            tryScan: tryScan,
+            lookAhead: lookAhead,
+            scanRange: scanRange
+        };
+        function error(message, length) {
+            if (onError) {
+                onError(message, length || 0);
+            }
+        }
+        function scanNumber() {
+            var start = pos;
+            while (isDigit(text.charCodeAt(pos)))
+                pos++;
+            if (text.charCodeAt(pos) === 46) {
+                pos++;
+                while (isDigit(text.charCodeAt(pos)))
+                    pos++;
+            }
+            var end = pos;
+            if (text.charCodeAt(pos) === 69 || text.charCodeAt(pos) === 101) {
+                pos++;
+                if (text.charCodeAt(pos) === 43 || text.charCodeAt(pos) === 45)
+                    pos++;
+                if (isDigit(text.charCodeAt(pos))) {
+                    pos++;
+                    while (isDigit(text.charCodeAt(pos)))
+                        pos++;
+                    end = pos;
+                }
+                else {
+                    error(ts.Diagnostics.Digit_expected);
+                }
+            }
+            return "" + +(text.substring(start, end));
+        }
+        function scanOctalDigits() {
+            var start = pos;
+            while (isOctalDigit(text.charCodeAt(pos))) {
+                pos++;
+            }
+            return +(text.substring(start, pos));
+        }
+        function scanExactNumberOfHexDigits(count) {
+            return scanHexDigits(count, false);
+        }
+        function scanMinimumNumberOfHexDigits(count) {
+            return scanHexDigits(count, true);
+        }
+        function scanHexDigits(minCount, scanAsManyAsPossible) {
+            var digits = 0;
+            var value = 0;
+            while (digits < minCount || scanAsManyAsPossible) {
+                var ch = text.charCodeAt(pos);
+                if (ch >= 48 && ch <= 57) {
+                    value = value * 16 + ch - 48;
+                }
+                else if (ch >= 65 && ch <= 70) {
+                    value = value * 16 + ch - 65 + 10;
+                }
+                else if (ch >= 97 && ch <= 102) {
+                    value = value * 16 + ch - 97 + 10;
+                }
+                else {
+                    break;
+                }
+                pos++;
+                digits++;
+            }
+            if (digits < minCount) {
+                value = -1;
+            }
+            return value;
+        }
+        function scanString() {
+            var quote = text.charCodeAt(pos);
+            pos++;
+            var result = "";
+            var start = pos;
+            while (true) {
+                if (pos >= end) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                var ch = text.charCodeAt(pos);
+                if (ch === quote) {
+                    result += text.substring(start, pos);
+                    pos++;
+                    break;
+                }
+                if (ch === 92) {
+                    result += text.substring(start, pos);
+                    result += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                if (isLineBreak(ch)) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                pos++;
+            }
+            return result;
+        }
+        function scanTemplateAndSetTokenValue() {
+            var startedWithBacktick = text.charCodeAt(pos) === 96;
+            pos++;
+            var start = pos;
+            var contents = "";
+            var resultingToken;
+            while (true) {
+                if (pos >= end) {
+                    contents += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_template_literal);
+                    resultingToken = startedWithBacktick ? 11 : 14;
+                    break;
+                }
+                var currChar = text.charCodeAt(pos);
+                if (currChar === 96) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    resultingToken = startedWithBacktick ? 11 : 14;
+                    break;
+                }
+                if (currChar === 36 && pos + 1 < end && text.charCodeAt(pos + 1) === 123) {
+                    contents += text.substring(start, pos);
+                    pos += 2;
+                    resultingToken = startedWithBacktick ? 12 : 13;
+                    break;
+                }
+                if (currChar === 92) {
+                    contents += text.substring(start, pos);
+                    contents += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                if (currChar === 13) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    if (pos < end && text.charCodeAt(pos) === 10) {
+                        pos++;
+                    }
+                    contents += "\n";
+                    start = pos;
+                    continue;
+                }
+                pos++;
+            }
+            ts.Debug.assert(resultingToken !== undefined);
+            tokenValue = contents;
+            return resultingToken;
+        }
+        function scanEscapeSequence() {
+            pos++;
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                return "";
+            }
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 48:
+                    return "\0";
+                case 98:
+                    return "\b";
+                case 116:
+                    return "\t";
+                case 110:
+                    return "\n";
+                case 118:
+                    return "\v";
+                case 102:
+                    return "\f";
+                case 114:
+                    return "\r";
+                case 39:
+                    return "\'";
+                case 34:
+                    return "\"";
+                case 117:
+                    if (pos < end && text.charCodeAt(pos) === 123) {
+                        hasExtendedUnicodeEscape = true;
+                        pos++;
+                        return scanExtendedUnicodeEscape();
+                    }
+                    return scanHexadecimalEscape(4);
+                case 120:
+                    return scanHexadecimalEscape(2);
+                case 13:
+                    if (pos < end && text.charCodeAt(pos) === 10) {
+                        pos++;
+                    }
+                case 10:
+                case 8232:
+                case 8233:
+                    return "";
+                default:
+                    return String.fromCharCode(ch);
+            }
+        }
+        function scanHexadecimalEscape(numDigits) {
+            var escapedValue = scanExactNumberOfHexDigits(numDigits);
+            if (escapedValue >= 0) {
+                return String.fromCharCode(escapedValue);
+            }
+            else {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                return "";
+            }
+        }
+        function scanExtendedUnicodeEscape() {
+            var escapedValue = scanMinimumNumberOfHexDigits(1);
+            var isInvalidExtendedEscape = false;
+            if (escapedValue < 0) {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                isInvalidExtendedEscape = true;
+            }
+            else if (escapedValue > 0x10FFFF) {
+                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
+                isInvalidExtendedEscape = true;
+            }
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                isInvalidExtendedEscape = true;
+            }
+            else if (text.charCodeAt(pos) === 125) {
+                pos++;
+            }
+            else {
+                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
+                isInvalidExtendedEscape = true;
+            }
+            if (isInvalidExtendedEscape) {
+                return "";
+            }
+            return utf16EncodeAsString(escapedValue);
+        }
+        function utf16EncodeAsString(codePoint) {
+            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
+            if (codePoint <= 65535) {
+                return String.fromCharCode(codePoint);
+            }
+            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
+            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
+            return String.fromCharCode(codeUnit1, codeUnit2);
+        }
+        function peekUnicodeEscape() {
+            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117) {
+                var start_1 = pos;
+                pos += 2;
+                var value = scanExactNumberOfHexDigits(4);
+                pos = start_1;
+                return value;
+            }
+            return -1;
+        }
+        function scanIdentifierParts() {
+            var result = "";
+            var start = pos;
+            while (pos < end) {
+                var ch = text.charCodeAt(pos);
+                if (isIdentifierPart(ch, languageVersion)) {
+                    pos++;
+                }
+                else if (ch === 92) {
+                    ch = peekUnicodeEscape();
+                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
+                        break;
+                    }
+                    result += text.substring(start, pos);
+                    result += String.fromCharCode(ch);
+                    pos += 6;
+                    start = pos;
+                }
+                else {
+                    break;
+                }
+            }
+            result += text.substring(start, pos);
+            return result;
+        }
+        function getIdentifierToken() {
+            var len = tokenValue.length;
+            if (len >= 2 && len <= 11) {
+                var ch = tokenValue.charCodeAt(0);
+                if (ch >= 97 && ch <= 122 && hasOwnProperty.call(textToToken, tokenValue)) {
+                    return token = textToToken[tokenValue];
+                }
+            }
+            return token = 69;
+        }
+        function scanBinaryOrOctalDigits(base) {
+            ts.Debug.assert(base !== 2 || base !== 8, "Expected either base 2 or base 8");
+            var value = 0;
+            var numberOfDigits = 0;
+            while (true) {
+                var ch = text.charCodeAt(pos);
+                var valueOfCh = ch - 48;
+                if (!isDigit(ch) || valueOfCh >= base) {
+                    break;
+                }
+                value = value * base + valueOfCh;
+                pos++;
+                numberOfDigits++;
+            }
+            if (numberOfDigits === 0) {
+                return -1;
+            }
+            return value;
+        }
+        function scan() {
+            startPos = pos;
+            hasExtendedUnicodeEscape = false;
+            precedingLineBreak = false;
+            tokenIsUnterminated = false;
+            while (true) {
+                tokenPos = pos;
+                if (pos >= end) {
+                    return token = 1;
+                }
+                var ch = text.charCodeAt(pos);
+                if (ch === 35 && pos === 0 && isShebangTrivia(text, pos)) {
+                    pos = scanShebangTrivia(text, pos);
+                    if (skipTrivia) {
+                        continue;
+                    }
+                    else {
+                        return token = 6;
+                    }
+                }
+                switch (ch) {
+                    case 10:
+                    case 13:
+                        precedingLineBreak = true;
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            if (ch === 13 && pos + 1 < end && text.charCodeAt(pos + 1) === 10) {
+                                pos += 2;
+                            }
+                            else {
+                                pos++;
+                            }
+                            return token = 4;
+                        }
+                    case 9:
+                    case 11:
+                    case 12:
+                    case 32:
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            while (pos < end && isWhiteSpace(text.charCodeAt(pos))) {
+                                pos++;
+                            }
+                            return token = 5;
+                        }
+                    case 33:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 33;
+                            }
+                            return pos += 2, token = 31;
+                        }
+                        pos++;
+                        return token = 49;
+                    case 34:
+                    case 39:
+                        tokenValue = scanString();
+                        return token = 9;
+                    case 96:
+                        return token = scanTemplateAndSetTokenValue();
+                    case 37:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 62;
+                        }
+                        pos++;
+                        return token = 40;
+                    case 38:
+                        if (text.charCodeAt(pos + 1) === 38) {
+                            return pos += 2, token = 51;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 66;
+                        }
+                        pos++;
+                        return token = 46;
+                    case 40:
+                        pos++;
+                        return token = 17;
+                    case 41:
+                        pos++;
+                        return token = 18;
+                    case 42:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 59;
+                        }
+                        if (text.charCodeAt(pos + 1) === 42) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 60;
+                            }
+                            return pos += 2, token = 38;
+                        }
+                        pos++;
+                        return token = 37;
+                    case 43:
+                        if (text.charCodeAt(pos + 1) === 43) {
+                            return pos += 2, token = 41;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 57;
+                        }
+                        pos++;
+                        return token = 35;
+                    case 44:
+                        pos++;
+                        return token = 24;
+                    case 45:
+                        if (text.charCodeAt(pos + 1) === 45) {
+                            return pos += 2, token = 42;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 58;
+                        }
+                        pos++;
+                        return token = 36;
+                    case 46:
+                        if (isDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = scanNumber();
+                            return token = 8;
+                        }
+                        if (text.charCodeAt(pos + 1) === 46 && text.charCodeAt(pos + 2) === 46) {
+                            return pos += 3, token = 22;
+                        }
+                        pos++;
+                        return token = 21;
+                    case 47:
+                        if (text.charCodeAt(pos + 1) === 47) {
+                            pos += 2;
+                            while (pos < end) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    break;
+                                }
+                                pos++;
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 2;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 42) {
+                            pos += 2;
+                            var commentClosed = false;
+                            while (pos < end) {
+                                var ch_2 = text.charCodeAt(pos);
+                                if (ch_2 === 42 && text.charCodeAt(pos + 1) === 47) {
+                                    pos += 2;
+                                    commentClosed = true;
+                                    break;
+                                }
+                                if (isLineBreak(ch_2)) {
+                                    precedingLineBreak = true;
+                                }
+                                pos++;
+                            }
+                            if (!commentClosed) {
+                                error(ts.Diagnostics.Asterisk_Slash_expected);
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                tokenIsUnterminated = !commentClosed;
+                                return token = 3;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 61;
+                        }
+                        pos++;
+                        return token = 39;
+                    case 48:
+                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 || text.charCodeAt(pos + 1) === 120)) {
+                            pos += 2;
+                            var value = scanMinimumNumberOfHexDigits(1);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 || text.charCodeAt(pos + 1) === 98)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(2);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Binary_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 || text.charCodeAt(pos + 1) === 111)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(8);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Octal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8;
+                        }
+                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = "" + scanOctalDigits();
+                            return token = 8;
+                        }
+                    case 49:
+                    case 50:
+                    case 51:
+                    case 52:
+                    case 53:
+                    case 54:
+                    case 55:
+                    case 56:
+                    case 57:
+                        tokenValue = scanNumber();
+                        return token = 8;
+                    case 58:
+                        pos++;
+                        return token = 54;
+                    case 59:
+                        pos++;
+                        return token = 23;
+                    case 60:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 60) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 63;
+                            }
+                            return pos += 2, token = 43;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 28;
+                        }
+                        if (languageVariant === 1 &&
+                            text.charCodeAt(pos + 1) === 47 &&
+                            text.charCodeAt(pos + 2) !== 42) {
+                            return pos += 2, token = 26;
+                        }
+                        pos++;
+                        return token = 25;
+                    case 61:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 32;
+                            }
+                            return pos += 2, token = 30;
+                        }
+                        if (text.charCodeAt(pos + 1) === 62) {
+                            return pos += 2, token = 34;
+                        }
+                        pos++;
+                        return token = 56;
+                    case 62:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7;
+                            }
+                        }
+                        pos++;
+                        return token = 27;
+                    case 63:
+                        pos++;
+                        return token = 53;
+                    case 91:
+                        pos++;
+                        return token = 19;
+                    case 93:
+                        pos++;
+                        return token = 20;
+                    case 94:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 68;
+                        }
+                        pos++;
+                        return token = 48;
+                    case 123:
+                        pos++;
+                        return token = 15;
+                    case 124:
+                        if (text.charCodeAt(pos + 1) === 124) {
+                            return pos += 2, token = 52;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 67;
+                        }
+                        pos++;
+                        return token = 47;
+                    case 125:
+                        pos++;
+                        return token = 16;
+                    case 126:
+                        pos++;
+                        return token = 50;
+                    case 64:
+                        pos++;
+                        return token = 55;
+                    case 92:
+                        var cookedChar = peekUnicodeEscape();
+                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
+                            pos += 6;
+                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
+                            return token = getIdentifierToken();
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0;
+                    default:
+                        if (isIdentifierStart(ch, languageVersion)) {
+                            pos++;
+                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
+                                pos++;
+                            tokenValue = text.substring(tokenPos, pos);
+                            if (ch === 92) {
+                                tokenValue += scanIdentifierParts();
+                            }
+                            return token = getIdentifierToken();
+                        }
+                        else if (isWhiteSpace(ch)) {
+                            pos++;
+                            continue;
+                        }
+                        else if (isLineBreak(ch)) {
+                            precedingLineBreak = true;
+                            pos++;
+                            continue;
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0;
+                }
+            }
+        }
+        function reScanGreaterToken() {
+            if (token === 27) {
+                if (text.charCodeAt(pos) === 62) {
+                    if (text.charCodeAt(pos + 1) === 62) {
+                        if (text.charCodeAt(pos + 2) === 61) {
+                            return pos += 3, token = 65;
+                        }
+                        return pos += 2, token = 45;
+                    }
+                    if (text.charCodeAt(pos + 1) === 61) {
+                        return pos += 2, token = 64;
+                    }
+                    pos++;
+                    return token = 44;
+                }
+                if (text.charCodeAt(pos) === 61) {
+                    pos++;
+                    return token = 29;
+                }
+            }
+            return token;
+        }
+        function reScanSlashToken() {
+            if (token === 39 || token === 61) {
+                var p = tokenPos + 1;
+                var inEscape = false;
+                var inCharacterClass = false;
+                while (true) {
+                    if (p >= end) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    var ch = text.charCodeAt(p);
+                    if (isLineBreak(ch)) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    if (inEscape) {
+                        inEscape = false;
+                    }
+                    else if (ch === 47 && !inCharacterClass) {
+                        p++;
+                        break;
+                    }
+                    else if (ch === 91) {
+                        inCharacterClass = true;
+                    }
+                    else if (ch === 92) {
+                        inEscape = true;
+                    }
+                    else if (ch === 93) {
+                        inCharacterClass = false;
+                    }
+                    p++;
+                }
+                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
+                    p++;
+                }
+                pos = p;
+                tokenValue = text.substring(tokenPos, pos);
+                token = 10;
+            }
+            return token;
+        }
+        function reScanTemplateToken() {
+            ts.Debug.assert(token === 16, "'reScanTemplateToken' should only be called on a '}'");
+            pos = tokenPos;
+            return token = scanTemplateAndSetTokenValue();
+        }
+        function reScanJsxToken() {
+            pos = tokenPos = startPos;
+            return token = scanJsxToken();
+        }
+        function scanJsxToken() {
+            startPos = tokenPos = pos;
+            if (pos >= end) {
+                return token = 1;
+            }
+            var char = text.charCodeAt(pos);
+            if (char === 60) {
+                if (text.charCodeAt(pos + 1) === 47) {
+                    pos += 2;
+                    return token = 26;
+                }
+                pos++;
+                return token = 25;
+            }
+            if (char === 123) {
+                pos++;
+                return token = 15;
+            }
+            while (pos < end) {
+                pos++;
+                char = text.charCodeAt(pos);
+                if ((char === 123) || (char === 60)) {
+                    break;
+                }
+            }
+            return token = 244;
+        }
+        function scanJsxIdentifier() {
+            if (tokenIsIdentifierOrKeyword(token)) {
+                var firstCharPosition = pos;
+                while (pos < end) {
+                    var ch = text.charCodeAt(pos);
+                    if (ch === 45 || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
+                        pos++;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
+            }
+            return token;
+        }
+        function scanJSDocToken() {
+            if (pos >= end) {
+                return token = 1;
+            }
+            startPos = pos;
+            var ch = text.charCodeAt(pos);
+            while (pos < end) {
+                ch = text.charCodeAt(pos);
+                if (isWhiteSpace(ch)) {
+                    pos++;
+                }
+                else {
+                    break;
+                }
+            }
+            tokenPos = pos;
+            switch (ch) {
+                case 64:
+                    return pos += 1, token = 55;
+                case 10:
+                case 13:
+                    return pos += 1, token = 4;
+                case 42:
+                    return pos += 1, token = 37;
+                case 123:
+                    return pos += 1, token = 15;
+                case 125:
+                    return pos += 1, token = 16;
+                case 91:
+                    return pos += 1, token = 19;
+                case 93:
+                    return pos += 1, token = 20;
+                case 61:
+                    return pos += 1, token = 56;
+                case 44:
+                    return pos += 1, token = 24;
+            }
+            if (isIdentifierStart(ch, 2)) {
+                pos++;
+                while (isIdentifierPart(text.charCodeAt(pos), 2) && pos < end) {
+                    pos++;
+                }
+                return token = 69;
+            }
+            else {
+                return pos += 1, token = 0;
+            }
+        }
+        function speculationHelper(callback, isLookahead) {
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var saveTokenValue = tokenValue;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var result = callback();
+            if (!result || isLookahead) {
+                pos = savePos;
+                startPos = saveStartPos;
+                tokenPos = saveTokenPos;
+                token = saveToken;
+                tokenValue = saveTokenValue;
+                precedingLineBreak = savePrecedingLineBreak;
+            }
+            return result;
+        }
+        function scanRange(start, length, callback) {
+            var saveEnd = end;
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var saveTokenValue = tokenValue;
+            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
+            var saveTokenIsUnterminated = tokenIsUnterminated;
+            setText(text, start, length);
+            var result = callback();
+            end = saveEnd;
+            pos = savePos;
+            startPos = saveStartPos;
+            tokenPos = saveTokenPos;
+            token = saveToken;
+            precedingLineBreak = savePrecedingLineBreak;
+            tokenValue = saveTokenValue;
+            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
+            tokenIsUnterminated = saveTokenIsUnterminated;
+            return result;
+        }
+        function lookAhead(callback) {
+            return speculationHelper(callback, true);
+        }
+        function tryScan(callback) {
+            return speculationHelper(callback, false);
+        }
+        function setText(newText, start, length) {
+            text = newText || "";
+            end = length === undefined ? text.length : start + length;
+            setTextPos(start || 0);
+        }
+        function setOnError(errorCallback) {
+            onError = errorCallback;
+        }
+        function setScriptTarget(scriptTarget) {
+            languageVersion = scriptTarget;
+        }
+        function setLanguageVariant(variant) {
+            languageVariant = variant;
+        }
+        function setTextPos(textPos) {
+            ts.Debug.assert(textPos >= 0);
+            pos = textPos;
+            startPos = textPos;
+            tokenPos = textPos;
+            token = 0;
+            precedingLineBreak = false;
+            tokenValue = undefined;
+            hasExtendedUnicodeEscape = false;
+            tokenIsUnterminated = false;
+        }
+    }
+    ts.createScanner = createScanner;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getDeclarationOfKind(symbol, kind) {
+        var declarations = symbol.declarations;
+        if (declarations) {
+            for (var _i = 0, declarations_1 = declarations; _i < declarations_1.length; _i++) {
+                var declaration = declarations_1[_i];
+                if (declaration.kind === kind) {
+                    return declaration;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getDeclarationOfKind = getDeclarationOfKind;
+    var stringWriters = [];
+    function getSingleLineStringWriter() {
+        if (stringWriters.length === 0) {
+            var str_1 = "";
+            var writeText = function (text) { return str_1 += text; };
+            return {
+                string: function () { return str_1; },
+                writeKeyword: writeText,
+                writeOperator: writeText,
+                writePunctuation: writeText,
+                writeSpace: writeText,
+                writeStringLiteral: writeText,
+                writeParameter: writeText,
+                writeSymbol: writeText,
+                writeLine: function () { return str_1 += " "; },
+                increaseIndent: function () { },
+                decreaseIndent: function () { },
+                clear: function () { return str_1 = ""; },
+                trackSymbol: function () { },
+                reportInaccessibleThisError: function () { }
+            };
+        }
+        return stringWriters.pop();
+    }
+    ts.getSingleLineStringWriter = getSingleLineStringWriter;
+    function releaseStringWriter(writer) {
+        writer.clear();
+        stringWriters.push(writer);
+    }
+    ts.releaseStringWriter = releaseStringWriter;
+    function getFullWidth(node) {
+        return node.end - node.pos;
+    }
+    ts.getFullWidth = getFullWidth;
+    function mapIsEqualTo(map1, map2) {
+        if (!map1 || !map2) {
+            return map1 === map2;
+        }
+        return containsAll(map1, map2) && containsAll(map2, map1);
+    }
+    ts.mapIsEqualTo = mapIsEqualTo;
+    function containsAll(map, other) {
+        for (var key in map) {
+            if (!ts.hasProperty(map, key)) {
+                continue;
+            }
+            if (!ts.hasProperty(other, key) || map[key] !== other[key]) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function arrayIsEqualTo(array1, array2, equaler) {
+        if (!array1 || !array2) {
+            return array1 === array2;
+        }
+        if (array1.length !== array2.length) {
+            return false;
+        }
+        for (var i = 0; i < array1.length; i++) {
+            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
+            if (!equals) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.arrayIsEqualTo = arrayIsEqualTo;
+    function hasResolvedModule(sourceFile, moduleNameText) {
+        return sourceFile.resolvedModules && ts.hasProperty(sourceFile.resolvedModules, moduleNameText);
+    }
+    ts.hasResolvedModule = hasResolvedModule;
+    function getResolvedModule(sourceFile, moduleNameText) {
+        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
+    }
+    ts.getResolvedModule = getResolvedModule;
+    function setResolvedModule(sourceFile, moduleNameText, resolvedModule) {
+        if (!sourceFile.resolvedModules) {
+            sourceFile.resolvedModules = {};
+        }
+        sourceFile.resolvedModules[moduleNameText] = resolvedModule;
+    }
+    ts.setResolvedModule = setResolvedModule;
+    function setResolvedTypeReferenceDirective(sourceFile, typeReferenceDirectiveName, resolvedTypeReferenceDirective) {
+        if (!sourceFile.resolvedTypeReferenceDirectiveNames) {
+            sourceFile.resolvedTypeReferenceDirectiveNames = {};
+        }
+        sourceFile.resolvedTypeReferenceDirectiveNames[typeReferenceDirectiveName] = resolvedTypeReferenceDirective;
+    }
+    ts.setResolvedTypeReferenceDirective = setResolvedTypeReferenceDirective;
+    function moduleResolutionIsEqualTo(oldResolution, newResolution) {
+        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport;
+    }
+    ts.moduleResolutionIsEqualTo = moduleResolutionIsEqualTo;
+    function typeDirectiveIsEqualTo(oldResolution, newResolution) {
+        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.primary === newResolution.primary;
+    }
+    ts.typeDirectiveIsEqualTo = typeDirectiveIsEqualTo;
+    function hasChangesInResolutions(names, newResolutions, oldResolutions, comparer) {
+        if (names.length !== newResolutions.length) {
+            return false;
+        }
+        for (var i = 0; i < names.length; i++) {
+            var newResolution = newResolutions[i];
+            var oldResolution = oldResolutions && ts.hasProperty(oldResolutions, names[i]) ? oldResolutions[names[i]] : undefined;
+            var changed = oldResolution
+                ? !newResolution || !comparer(oldResolution, newResolution)
+                : newResolution;
+            if (changed) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.hasChangesInResolutions = hasChangesInResolutions;
+    function containsParseError(node) {
+        aggregateChildData(node);
+        return (node.flags & 268435456) !== 0;
+    }
+    ts.containsParseError = containsParseError;
+    function aggregateChildData(node) {
+        if (!(node.flags & 536870912)) {
+            var thisNodeOrAnySubNodesHasError = ((node.flags & 67108864) !== 0) ||
+                ts.forEachChild(node, containsParseError);
+            if (thisNodeOrAnySubNodesHasError) {
+                node.flags |= 268435456;
+            }
+            node.flags |= 536870912;
+        }
+    }
+    function getSourceFileOfNode(node) {
+        while (node && node.kind !== 256) {
+            node = node.parent;
+        }
+        return node;
+    }
+    ts.getSourceFileOfNode = getSourceFileOfNode;
+    function isStatementWithLocals(node) {
+        switch (node.kind) {
+            case 199:
+            case 227:
+            case 206:
+            case 207:
+            case 208:
+                return true;
+        }
+        return false;
+    }
+    ts.isStatementWithLocals = isStatementWithLocals;
+    function getStartPositionOfLine(line, sourceFile) {
+        ts.Debug.assert(line >= 0);
+        return ts.getLineStarts(sourceFile)[line];
+    }
+    ts.getStartPositionOfLine = getStartPositionOfLine;
+    function nodePosToString(node) {
+        var file = getSourceFileOfNode(node);
+        var loc = ts.getLineAndCharacterOfPosition(file, node.pos);
+        return file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + ")";
+    }
+    ts.nodePosToString = nodePosToString;
+    function getStartPosOfNode(node) {
+        return node.pos;
+    }
+    ts.getStartPosOfNode = getStartPosOfNode;
+    function getEndLinePosition(line, sourceFile) {
+        ts.Debug.assert(line >= 0);
+        var lineStarts = ts.getLineStarts(sourceFile);
+        var lineIndex = line;
+        var sourceText = sourceFile.text;
+        if (lineIndex + 1 === lineStarts.length) {
+            return sourceText.length - 1;
+        }
+        else {
+            var start = lineStarts[lineIndex];
+            var pos = lineStarts[lineIndex + 1] - 1;
+            ts.Debug.assert(ts.isLineBreak(sourceText.charCodeAt(pos)));
+            while (start <= pos && ts.isLineBreak(sourceText.charCodeAt(pos))) {
+                pos--;
+            }
+            return pos;
+        }
+    }
+    ts.getEndLinePosition = getEndLinePosition;
+    function nodeIsMissing(node) {
+        if (!node) {
+            return true;
+        }
+        return node.pos === node.end && node.pos >= 0 && node.kind !== 1;
+    }
+    ts.nodeIsMissing = nodeIsMissing;
+    function nodeIsPresent(node) {
+        return !nodeIsMissing(node);
+    }
+    ts.nodeIsPresent = nodeIsPresent;
+    function getTokenPosOfNode(node, sourceFile, includeJsDocComment) {
+        if (nodeIsMissing(node)) {
+            return node.pos;
+        }
+        if (isJSDocNode(node)) {
+            return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos, false, true);
+        }
+        if (includeJsDocComment && node.jsDocComments && node.jsDocComments.length > 0) {
+            return getTokenPosOfNode(node.jsDocComments[0]);
+        }
+        if (node.kind === 282 && node._children.length > 0) {
+            return getTokenPosOfNode(node._children[0], sourceFile, includeJsDocComment);
+        }
+        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
+    }
+    ts.getTokenPosOfNode = getTokenPosOfNode;
+    function isJSDocNode(node) {
+        return node.kind >= 257 && node.kind <= 281;
+    }
+    ts.isJSDocNode = isJSDocNode;
+    function getNonDecoratorTokenPosOfNode(node, sourceFile) {
+        if (nodeIsMissing(node) || !node.decorators) {
+            return getTokenPosOfNode(node, sourceFile);
+        }
+        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.decorators.end);
+    }
+    ts.getNonDecoratorTokenPosOfNode = getNonDecoratorTokenPosOfNode;
+    function getSourceTextOfNodeFromSourceFile(sourceFile, node, includeTrivia) {
+        if (includeTrivia === void 0) { includeTrivia = false; }
+        if (nodeIsMissing(node)) {
+            return "";
+        }
+        var text = sourceFile.text;
+        return text.substring(includeTrivia ? node.pos : ts.skipTrivia(text, node.pos), node.end);
+    }
+    ts.getSourceTextOfNodeFromSourceFile = getSourceTextOfNodeFromSourceFile;
+    function getTextOfNodeFromSourceText(sourceText, node) {
+        if (nodeIsMissing(node)) {
+            return "";
+        }
+        return sourceText.substring(ts.skipTrivia(sourceText, node.pos), node.end);
+    }
+    ts.getTextOfNodeFromSourceText = getTextOfNodeFromSourceText;
+    function getTextOfNode(node, includeTrivia) {
+        if (includeTrivia === void 0) { includeTrivia = false; }
+        return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
+    }
+    ts.getTextOfNode = getTextOfNode;
+    function escapeIdentifier(identifier) {
+        return identifier.length >= 2 && identifier.charCodeAt(0) === 95 && identifier.charCodeAt(1) === 95 ? "_" + identifier : identifier;
+    }
+    ts.escapeIdentifier = escapeIdentifier;
+    function unescapeIdentifier(identifier) {
+        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 && identifier.charCodeAt(1) === 95 && identifier.charCodeAt(2) === 95 ? identifier.substr(1) : identifier;
+    }
+    ts.unescapeIdentifier = unescapeIdentifier;
+    function makeIdentifierFromModuleName(moduleName) {
+        return ts.getBaseFileName(moduleName).replace(/^(\d)/, "_$1").replace(/\W/g, "_");
+    }
+    ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
+    function isBlockOrCatchScoped(declaration) {
+        return (getCombinedNodeFlags(declaration) & 3072) !== 0 ||
+            isCatchClauseVariableDeclaration(declaration);
+    }
+    ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
+    function isAmbientModule(node) {
+        return node && node.kind === 225 &&
+            (node.name.kind === 9 || isGlobalScopeAugmentation(node));
+    }
+    ts.isAmbientModule = isAmbientModule;
+    function isBlockScopedContainerTopLevel(node) {
+        return node.kind === 256 ||
+            node.kind === 225 ||
+            isFunctionLike(node) ||
+            isFunctionBlock(node);
+    }
+    ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
+    function isGlobalScopeAugmentation(module) {
+        return !!(module.flags & 131072);
+    }
+    ts.isGlobalScopeAugmentation = isGlobalScopeAugmentation;
+    function isExternalModuleAugmentation(node) {
+        if (!node || !isAmbientModule(node)) {
+            return false;
+        }
+        switch (node.parent.kind) {
+            case 256:
+                return ts.isExternalModule(node.parent);
+            case 226:
+                return isAmbientModule(node.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
+        }
+        return false;
+    }
+    ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
+    function getEnclosingBlockScopeContainer(node) {
+        var current = node.parent;
+        while (current) {
+            if (isFunctionLike(current)) {
+                return current;
+            }
+            switch (current.kind) {
+                case 256:
+                case 227:
+                case 252:
+                case 225:
+                case 206:
+                case 207:
+                case 208:
+                    return current;
+                case 199:
+                    if (!isFunctionLike(current.parent)) {
+                        return current;
+                    }
+            }
+            current = current.parent;
+        }
+    }
+    ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
+    function isCatchClauseVariableDeclaration(declaration) {
+        return declaration &&
+            declaration.kind === 218 &&
+            declaration.parent &&
+            declaration.parent.kind === 252;
+    }
+    ts.isCatchClauseVariableDeclaration = isCatchClauseVariableDeclaration;
+    function declarationNameToString(name) {
+        return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
+    }
+    ts.declarationNameToString = declarationNameToString;
+    function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
+        var sourceFile = getSourceFileOfNode(node);
+        var span = getErrorSpanForNode(sourceFile, node);
+        return ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2);
+    }
+    ts.createDiagnosticForNode = createDiagnosticForNode;
+    function createDiagnosticForNodeFromMessageChain(node, messageChain) {
+        var sourceFile = getSourceFileOfNode(node);
+        var span = getErrorSpanForNode(sourceFile, node);
+        return {
+            file: sourceFile,
+            start: span.start,
+            length: span.length,
+            code: messageChain.code,
+            category: messageChain.category,
+            messageText: messageChain.next ? messageChain : messageChain.messageText
+        };
+    }
+    ts.createDiagnosticForNodeFromMessageChain = createDiagnosticForNodeFromMessageChain;
+    function getSpanOfTokenAtPosition(sourceFile, pos) {
+        var scanner = ts.createScanner(sourceFile.languageVersion, true, sourceFile.languageVariant, sourceFile.text, undefined, pos);
+        scanner.scan();
+        var start = scanner.getTokenPos();
+        return ts.createTextSpanFromBounds(start, scanner.getTextPos());
+    }
+    ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
+    function getErrorSpanForArrowFunction(sourceFile, node) {
+        var pos = ts.skipTrivia(sourceFile.text, node.pos);
+        if (node.body && node.body.kind === 199) {
+            var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
+            var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
+            if (startLine < endLine) {
+                return ts.createTextSpan(pos, getEndLinePosition(startLine, sourceFile) - pos + 1);
+            }
+        }
+        return ts.createTextSpanFromBounds(pos, node.end);
+    }
+    function getErrorSpanForNode(sourceFile, node) {
+        var errorNode = node;
+        switch (node.kind) {
+            case 256:
+                var pos_1 = ts.skipTrivia(sourceFile.text, 0, false);
+                if (pos_1 === sourceFile.text.length) {
+                    return ts.createTextSpan(0, 0);
+                }
+                return getSpanOfTokenAtPosition(sourceFile, pos_1);
+            case 218:
+            case 169:
+            case 221:
+            case 192:
+            case 222:
+            case 225:
+            case 224:
+            case 255:
+            case 220:
+            case 179:
+            case 147:
+            case 149:
+            case 150:
+            case 223:
+                errorNode = node.name;
+                break;
+            case 180:
+                return getErrorSpanForArrowFunction(sourceFile, node);
+        }
+        if (errorNode === undefined) {
+            return getSpanOfTokenAtPosition(sourceFile, node.pos);
+        }
+        var pos = nodeIsMissing(errorNode)
+            ? errorNode.pos
+            : ts.skipTrivia(sourceFile.text, errorNode.pos);
+        return ts.createTextSpanFromBounds(pos, errorNode.end);
+    }
+    ts.getErrorSpanForNode = getErrorSpanForNode;
+    function isExternalOrCommonJsModule(file) {
+        return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
+    }
+    ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
+    function isDeclarationFile(file) {
+        return file.isDeclarationFile;
+    }
+    ts.isDeclarationFile = isDeclarationFile;
+    function isConstEnumDeclaration(node) {
+        return node.kind === 224 && isConst(node);
+    }
+    ts.isConstEnumDeclaration = isConstEnumDeclaration;
+    function walkUpBindingElementsAndPatterns(node) {
+        while (node && (node.kind === 169 || isBindingPattern(node))) {
+            node = node.parent;
+        }
+        return node;
+    }
+    function getCombinedNodeFlags(node) {
+        node = walkUpBindingElementsAndPatterns(node);
+        var flags = node.flags;
+        if (node.kind === 218) {
+            node = node.parent;
+        }
+        if (node && node.kind === 219) {
+            flags |= node.flags;
+            node = node.parent;
+        }
+        if (node && node.kind === 200) {
+            flags |= node.flags;
+        }
+        return flags;
+    }
+    ts.getCombinedNodeFlags = getCombinedNodeFlags;
+    function isConst(node) {
+        return !!(getCombinedNodeFlags(node) & 2048);
+    }
+    ts.isConst = isConst;
+    function isLet(node) {
+        return !!(getCombinedNodeFlags(node) & 1024);
+    }
+    ts.isLet = isLet;
+    function isSuperCallExpression(n) {
+        return n.kind === 174 && n.expression.kind === 95;
+    }
+    ts.isSuperCallExpression = isSuperCallExpression;
+    function isPrologueDirective(node) {
+        return node.kind === 202 && node.expression.kind === 9;
+    }
+    ts.isPrologueDirective = isPrologueDirective;
+    function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
+        return ts.getLeadingCommentRanges(sourceFileOfNode.text, node.pos);
+    }
+    ts.getLeadingCommentRangesOfNode = getLeadingCommentRangesOfNode;
+    function getLeadingCommentRangesOfNodeFromText(node, text) {
+        return ts.getLeadingCommentRanges(text, node.pos);
+    }
+    ts.getLeadingCommentRangesOfNodeFromText = getLeadingCommentRangesOfNodeFromText;
+    function getJsDocComments(node, sourceFileOfNode) {
+        return getJsDocCommentsFromText(node, sourceFileOfNode.text);
+    }
+    ts.getJsDocComments = getJsDocComments;
+    function getJsDocCommentsFromText(node, text) {
+        var commentRanges = (node.kind === 142 ||
+            node.kind === 141 ||
+            node.kind === 179 ||
+            node.kind === 180) ?
+            ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
+            getLeadingCommentRangesOfNodeFromText(node, text);
+        return ts.filter(commentRanges, isJsDocComment);
+        function isJsDocComment(comment) {
+            return text.charCodeAt(comment.pos + 1) === 42 &&
+                text.charCodeAt(comment.pos + 2) === 42 &&
+                text.charCodeAt(comment.pos + 3) !== 47;
+        }
+    }
+    ts.getJsDocCommentsFromText = getJsDocCommentsFromText;
+    ts.fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
+    ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx = /^(\/\/\/\s*<reference\s+types\s*=\s*)('|")(.+?)\2.*?\/>/;
+    ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
+    function isTypeNode(node) {
+        if (154 <= node.kind && node.kind <= 166) {
+            return true;
+        }
+        switch (node.kind) {
+            case 117:
+            case 130:
+            case 132:
+            case 120:
+            case 133:
+            case 135:
+            case 127:
+                return true;
+            case 103:
+                return node.parent.kind !== 183;
+            case 194:
+                return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
+            case 69:
+                if (node.parent.kind === 139 && node.parent.right === node) {
+                    node = node.parent;
+                }
+                else if (node.parent.kind === 172 && node.parent.name === node) {
+                    node = node.parent;
+                }
+                ts.Debug.assert(node.kind === 69 || node.kind === 139 || node.kind === 172, "'node' was expected to be a qualified name, identifier or property access in 'isTypeNode'.");
+            case 139:
+            case 172:
+            case 97:
+                var parent_1 = node.parent;
+                if (parent_1.kind === 158) {
+                    return false;
+                }
+                if (154 <= parent_1.kind && parent_1.kind <= 166) {
+                    return true;
+                }
+                switch (parent_1.kind) {
+                    case 194:
+                        return !isExpressionWithTypeArgumentsInClassExtendsClause(parent_1);
+                    case 141:
+                        return node === parent_1.constraint;
+                    case 145:
+                    case 144:
+                    case 142:
+                    case 218:
+                        return node === parent_1.type;
+                    case 220:
+                    case 179:
+                    case 180:
+                    case 148:
+                    case 147:
+                    case 146:
+                    case 149:
+                    case 150:
+                        return node === parent_1.type;
+                    case 151:
+                    case 152:
+                    case 153:
+                        return node === parent_1.type;
+                    case 177:
+                        return node === parent_1.type;
+                    case 174:
+                    case 175:
+                        return parent_1.typeArguments && ts.indexOf(parent_1.typeArguments, node) >= 0;
+                    case 176:
+                        return false;
+                }
+        }
+        return false;
+    }
+    ts.isTypeNode = isTypeNode;
+    function forEachReturnStatement(body, visitor) {
+        return traverse(body);
+        function traverse(node) {
+            switch (node.kind) {
+                case 211:
+                    return visitor(node);
+                case 227:
+                case 199:
+                case 203:
+                case 204:
+                case 205:
+                case 206:
+                case 207:
+                case 208:
+                case 212:
+                case 213:
+                case 249:
+                case 250:
+                case 214:
+                case 216:
+                case 252:
+                    return ts.forEachChild(node, traverse);
+            }
+        }
+    }
+    ts.forEachReturnStatement = forEachReturnStatement;
+    function forEachYieldExpression(body, visitor) {
+        return traverse(body);
+        function traverse(node) {
+            switch (node.kind) {
+                case 190:
+                    visitor(node);
+                    var operand = node.expression;
+                    if (operand) {
+                        traverse(operand);
+                    }
+                case 224:
+                case 222:
+                case 225:
+                case 223:
+                case 221:
+                case 192:
+                    return;
+                default:
+                    if (isFunctionLike(node)) {
+                        var name_5 = node.name;
+                        if (name_5 && name_5.kind === 140) {
+                            traverse(name_5.expression);
+                            return;
+                        }
+                    }
+                    else if (!isTypeNode(node)) {
+                        ts.forEachChild(node, traverse);
+                    }
+            }
+        }
+    }
+    ts.forEachYieldExpression = forEachYieldExpression;
+    function isVariableLike(node) {
+        if (node) {
+            switch (node.kind) {
+                case 169:
+                case 255:
+                case 142:
+                case 253:
+                case 145:
+                case 144:
+                case 254:
+                case 218:
+                    return true;
+            }
+        }
+        return false;
+    }
+    ts.isVariableLike = isVariableLike;
+    function isAccessor(node) {
+        return node && (node.kind === 149 || node.kind === 150);
+    }
+    ts.isAccessor = isAccessor;
+    function isClassLike(node) {
+        return node && (node.kind === 221 || node.kind === 192);
+    }
+    ts.isClassLike = isClassLike;
+    function isFunctionLike(node) {
+        return node && isFunctionLikeKind(node.kind);
+    }
+    ts.isFunctionLike = isFunctionLike;
+    function isFunctionLikeKind(kind) {
+        switch (kind) {
+            case 148:
+            case 179:
+            case 220:
+            case 180:
+            case 147:
+            case 146:
+            case 149:
+            case 150:
+            case 151:
+            case 152:
+            case 153:
+            case 156:
+            case 157:
+                return true;
+        }
+    }
+    ts.isFunctionLikeKind = isFunctionLikeKind;
+    function introducesArgumentsExoticObject(node) {
+        switch (node.kind) {
+            case 147:
+            case 146:
+            case 148:
+            case 149:
+            case 150:
+            case 220:
+            case 179:
+                return true;
+        }
+        return false;
+    }
+    ts.introducesArgumentsExoticObject = introducesArgumentsExoticObject;
+    function isIterationStatement(node, lookInLabeledStatements) {
+        switch (node.kind) {
+            case 206:
+            case 207:
+            case 208:
+            case 204:
+            case 205:
+                return true;
+            case 214:
+                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
+        }
+        return false;
+    }
+    ts.isIterationStatement = isIterationStatement;
+    function isFunctionBlock(node) {
+        return node && node.kind === 199 && isFunctionLike(node.parent);
+    }
+    ts.isFunctionBlock = isFunctionBlock;
+    function isObjectLiteralMethod(node) {
+        return node && node.kind === 147 && node.parent.kind === 171;
+    }
+    ts.isObjectLiteralMethod = isObjectLiteralMethod;
+    function isIdentifierTypePredicate(predicate) {
+        return predicate && predicate.kind === 1;
+    }
+    ts.isIdentifierTypePredicate = isIdentifierTypePredicate;
+    function isThisTypePredicate(predicate) {
+        return predicate && predicate.kind === 0;
+    }
+    ts.isThisTypePredicate = isThisTypePredicate;
+    function getContainingFunction(node) {
+        while (true) {
+            node = node.parent;
+            if (!node || isFunctionLike(node)) {
+                return node;
+            }
+        }
+    }
+    ts.getContainingFunction = getContainingFunction;
+    function getContainingClass(node) {
+        while (true) {
+            node = node.parent;
+            if (!node || isClassLike(node)) {
+                return node;
+            }
+        }
+    }
+    ts.getContainingClass = getContainingClass;
+    function getThisContainer(node, includeArrowFunctions) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return undefined;
+            }
+            switch (node.kind) {
+                case 140:
+                    if (isClassLike(node.parent.parent)) {
+                        return node;
+                    }
+                    node = node.parent;
+                    break;
+                case 143:
+                    if (node.parent.kind === 142 && isClassElement(node.parent.parent)) {
+                        node = node.parent.parent;
+                    }
+                    else if (isClassElement(node.parent)) {
+                        node = node.parent;
+                    }
+                    break;
+                case 180:
+                    if (!includeArrowFunctions) {
+                        continue;
+                    }
+                case 220:
+                case 179:
+                case 225:
+                case 145:
+                case 144:
+                case 147:
+                case 146:
+                case 148:
+                case 149:
+                case 150:
+                case 151:
+                case 152:
+                case 153:
+                case 224:
+                case 256:
+                    return node;
+            }
+        }
+    }
+    ts.getThisContainer = getThisContainer;
+    function getSuperContainer(node, stopOnFunctions) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return node;
+            }
+            switch (node.kind) {
+                case 140:
+                    node = node.parent;
+                    break;
+                case 220:
+                case 179:
+                case 180:
+                    if (!stopOnFunctions) {
+                        continue;
+                    }
+                case 145:
+                case 144:
+                case 147:
+                case 146:
+                case 148:
+                case 149:
+                case 150:
+                    return node;
+                case 143:
+                    if (node.parent.kind === 142 && isClassElement(node.parent.parent)) {
+                        node = node.parent.parent;
+                    }
+                    else if (isClassElement(node.parent)) {
+                        node = node.parent;
+                    }
+                    break;
+            }
+        }
+    }
+    ts.getSuperContainer = getSuperContainer;
+    function getImmediatelyInvokedFunctionExpression(func) {
+        if (func.kind === 179 || func.kind === 180) {
+            var prev = func;
+            var parent_2 = func.parent;
+            while (parent_2.kind === 178) {
+                prev = parent_2;
+                parent_2 = parent_2.parent;
+            }
+            if (parent_2.kind === 174 && parent_2.expression === prev) {
+                return parent_2;
+            }
+        }
+    }
+    ts.getImmediatelyInvokedFunctionExpression = getImmediatelyInvokedFunctionExpression;
+    function isSuperPropertyOrElementAccess(node) {
+        return (node.kind === 172
+            || node.kind === 173)
+            && node.expression.kind === 95;
+    }
+    ts.isSuperPropertyOrElementAccess = isSuperPropertyOrElementAccess;
+    function getEntityNameFromTypeNode(node) {
+        if (node) {
+            switch (node.kind) {
+                case 155:
+                    return node.typeName;
+                case 194:
+                    return node.expression;
+                case 69:
+                case 139:
+                    return node;
+            }
+        }
+        return undefined;
+    }
+    ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
+    function getInvokedExpression(node) {
+        if (node.kind === 176) {
+            return node.tag;
+        }
+        return node.expression;
+    }
+    ts.getInvokedExpression = getInvokedExpression;
+    function nodeCanBeDecorated(node) {
+        switch (node.kind) {
+            case 221:
+                return true;
+            case 145:
+                return node.parent.kind === 221;
+            case 149:
+            case 150:
+            case 147:
+                return node.body !== undefined
+                    && node.parent.kind === 221;
+            case 142:
+                return node.parent.body !== undefined
+                    && (node.parent.kind === 148
+                        || node.parent.kind === 147
+                        || node.parent.kind === 150)
+                    && node.parent.parent.kind === 221;
+        }
+        return false;
+    }
+    ts.nodeCanBeDecorated = nodeCanBeDecorated;
+    function nodeIsDecorated(node) {
+        return node.decorators !== undefined
+            && nodeCanBeDecorated(node);
+    }
+    ts.nodeIsDecorated = nodeIsDecorated;
+    function isPropertyAccessExpression(node) {
+        return node.kind === 172;
+    }
+    ts.isPropertyAccessExpression = isPropertyAccessExpression;
+    function isElementAccessExpression(node) {
+        return node.kind === 173;
+    }
+    ts.isElementAccessExpression = isElementAccessExpression;
+    function isJSXTagName(node) {
+        var parent = node.parent;
+        if (parent.kind === 243 ||
+            parent.kind === 242 ||
+            parent.kind === 245) {
+            return parent.tagName === node;
+        }
+        return false;
+    }
+    ts.isJSXTagName = isJSXTagName;
+    function isExpression(node) {
+        switch (node.kind) {
+            case 97:
+            case 95:
+            case 93:
+            case 99:
+            case 84:
+            case 10:
+            case 170:
+            case 171:
+            case 172:
+            case 173:
+            case 174:
+            case 175:
+            case 176:
+            case 195:
+            case 177:
+            case 196:
+            case 178:
+            case 179:
+            case 192:
+            case 180:
+            case 183:
+            case 181:
+            case 182:
+            case 185:
+            case 186:
+            case 187:
+            case 188:
+            case 191:
+            case 189:
+            case 11:
+            case 193:
+            case 241:
+            case 242:
+            case 190:
+            case 184:
+                return true;
+            case 139:
+                while (node.parent.kind === 139) {
+                    node = node.parent;
+                }
+                return node.parent.kind === 158 || isJSXTagName(node);
+            case 69:
+                if (node.parent.kind === 158 || isJSXTagName(node)) {
+                    return true;
+                }
+            case 8:
+            case 9:
+            case 97:
+                var parent_3 = node.parent;
+                switch (parent_3.kind) {
+                    case 218:
+                    case 142:
+                    case 145:
+                    case 144:
+                    case 255:
+                    case 253:
+                    case 169:
+                        return parent_3.initializer === node;
+                    case 202:
+                    case 203:
+                    case 204:
+                    case 205:
+                    case 211:
+                    case 212:
+                    case 213:
+                    case 249:
+                    case 215:
+                    case 213:
+                        return parent_3.expression === node;
+                    case 206:
+                        var forStatement = parent_3;
+                        return (forStatement.initializer === node && forStatement.initializer.kind !== 219) ||
+                            forStatement.condition === node ||
+                            forStatement.incrementor === node;
+                    case 207:
+                    case 208:
+                        var forInStatement = parent_3;
+                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 219) ||
+                            forInStatement.expression === node;
+                    case 177:
+                    case 195:
+                        return node === parent_3.expression;
+                    case 197:
+                        return node === parent_3.expression;
+                    case 140:
+                        return node === parent_3.expression;
+                    case 143:
+                    case 248:
+                    case 247:
+                        return true;
+                    case 194:
+                        return parent_3.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent_3);
+                    default:
+                        if (isExpression(parent_3)) {
+                            return true;
+                        }
+                }
+        }
+        return false;
+    }
+    ts.isExpression = isExpression;
+    function isExternalModuleNameRelative(moduleName) {
+        return moduleName.substr(0, 2) === "./" || moduleName.substr(0, 3) === "../" || moduleName.substr(0, 2) === ".\\" || moduleName.substr(0, 3) === "..\\";
+    }
+    ts.isExternalModuleNameRelative = isExternalModuleNameRelative;
+    function isInstantiatedModule(node, preserveConstEnums) {
+        var moduleState = ts.getModuleInstanceState(node);
+        return moduleState === 1 ||
+            (preserveConstEnums && moduleState === 2);
+    }
+    ts.isInstantiatedModule = isInstantiatedModule;
+    function isExternalModuleImportEqualsDeclaration(node) {
+        return node.kind === 229 && node.moduleReference.kind === 240;
+    }
+    ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
+    function getExternalModuleImportEqualsDeclarationExpression(node) {
+        ts.Debug.assert(isExternalModuleImportEqualsDeclaration(node));
+        return node.moduleReference.expression;
+    }
+    ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
+    function isInternalModuleImportEqualsDeclaration(node) {
+        return node.kind === 229 && node.moduleReference.kind !== 240;
+    }
+    ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
+    function isSourceFileJavaScript(file) {
+        return isInJavaScriptFile(file);
+    }
+    ts.isSourceFileJavaScript = isSourceFileJavaScript;
+    function isInJavaScriptFile(node) {
+        return node && !!(node.flags & 134217728);
+    }
+    ts.isInJavaScriptFile = isInJavaScriptFile;
+    function isRequireCall(expression, checkArgumentIsStringLiteral) {
+        var isRequire = expression.kind === 174 &&
+            expression.expression.kind === 69 &&
+            expression.expression.text === "require" &&
+            expression.arguments.length === 1;
+        return isRequire && (!checkArgumentIsStringLiteral || expression.arguments[0].kind === 9);
+    }
+    ts.isRequireCall = isRequireCall;
+    function isSingleOrDoubleQuote(charCode) {
+        return charCode === 39 || charCode === 34;
+    }
+    ts.isSingleOrDoubleQuote = isSingleOrDoubleQuote;
+    function getSpecialPropertyAssignmentKind(expression) {
+        if (!isInJavaScriptFile(expression)) {
+            return 0;
+        }
+        if (expression.kind !== 187) {
+            return 0;
+        }
+        var expr = expression;
+        if (expr.operatorToken.kind !== 56 || expr.left.kind !== 172) {
+            return 0;
+        }
+        var lhs = expr.left;
+        if (lhs.expression.kind === 69) {
+            var lhsId = lhs.expression;
+            if (lhsId.text === "exports") {
+                return 1;
+            }
+            else if (lhsId.text === "module" && lhs.name.text === "exports") {
+                return 2;
+            }
+        }
+        else if (lhs.expression.kind === 97) {
+            return 4;
+        }
+        else if (lhs.expression.kind === 172) {
+            var innerPropertyAccess = lhs.expression;
+            if (innerPropertyAccess.expression.kind === 69) {
+                var innerPropertyAccessIdentifier = innerPropertyAccess.expression;
+                if (innerPropertyAccessIdentifier.text === "module" && innerPropertyAccess.name.text === "exports") {
+                    return 1;
+                }
+                if (innerPropertyAccess.name.text === "prototype") {
+                    return 3;
+                }
+            }
+        }
+        return 0;
+    }
+    ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
+    function getExternalModuleName(node) {
+        if (node.kind === 230) {
+            return node.moduleSpecifier;
+        }
+        if (node.kind === 229) {
+            var reference = node.moduleReference;
+            if (reference.kind === 240) {
+                return reference.expression;
+            }
+        }
+        if (node.kind === 236) {
+            return node.moduleSpecifier;
+        }
+        if (node.kind === 225 && node.name.kind === 9) {
+            return node.name;
+        }
+    }
+    ts.getExternalModuleName = getExternalModuleName;
+    function hasQuestionToken(node) {
+        if (node) {
+            switch (node.kind) {
+                case 142:
+                case 147:
+                case 146:
+                case 254:
+                case 253:
+                case 145:
+                case 144:
+                    return node.questionToken !== undefined;
+            }
+        }
+        return false;
+    }
+    ts.hasQuestionToken = hasQuestionToken;
+    function isJSDocConstructSignature(node) {
+        return node.kind === 269 &&
+            node.parameters.length > 0 &&
+            node.parameters[0].type.kind === 271;
+    }
+    ts.isJSDocConstructSignature = isJSDocConstructSignature;
+    function getJSDocTag(node, kind, checkParentVariableStatement) {
+        if (!node) {
+            return undefined;
+        }
+        var jsDocComments = getJSDocComments(node, checkParentVariableStatement);
+        if (!jsDocComments) {
+            return undefined;
+        }
+        for (var _i = 0, jsDocComments_1 = jsDocComments; _i < jsDocComments_1.length; _i++) {
+            var jsDocComment = jsDocComments_1[_i];
+            for (var _a = 0, _b = jsDocComment.tags; _a < _b.length; _a++) {
+                var tag = _b[_a];
+                if (tag.kind === kind) {
+                    return tag;
+                }
+            }
+        }
+    }
+    function getJSDocComments(node, checkParentVariableStatement) {
+        if (node.jsDocComments) {
+            return node.jsDocComments;
+        }
+        if (checkParentVariableStatement) {
+            var isInitializerOfVariableDeclarationInStatement = node.parent.kind === 218 &&
+                node.parent.initializer === node &&
+                node.parent.parent.parent.kind === 200;
+            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent : undefined;
+            if (variableStatementNode) {
+                return variableStatementNode.jsDocComments;
+            }
+            var parent_4 = node.parent;
+            var isSourceOfAssignmentExpressionStatement = parent_4 && parent_4.parent &&
+                parent_4.kind === 187 &&
+                parent_4.operatorToken.kind === 56 &&
+                parent_4.parent.kind === 202;
+            if (isSourceOfAssignmentExpressionStatement) {
+                return parent_4.parent.jsDocComments;
+            }
+            var isPropertyAssignmentExpression = parent_4 && parent_4.kind === 253;
+            if (isPropertyAssignmentExpression) {
+                return parent_4.jsDocComments;
+            }
+        }
+        return undefined;
+    }
+    function getJSDocTypeTag(node) {
+        return getJSDocTag(node, 277, false);
+    }
+    ts.getJSDocTypeTag = getJSDocTypeTag;
+    function getJSDocReturnTag(node) {
+        return getJSDocTag(node, 276, true);
+    }
+    ts.getJSDocReturnTag = getJSDocReturnTag;
+    function getJSDocTemplateTag(node) {
+        return getJSDocTag(node, 278, false);
+    }
+    ts.getJSDocTemplateTag = getJSDocTemplateTag;
+    function getCorrespondingJSDocParameterTag(parameter) {
+        if (parameter.name && parameter.name.kind === 69) {
+            var parameterName = parameter.name.text;
+            var jsDocComments = getJSDocComments(parameter.parent, true);
+            if (jsDocComments) {
+                for (var _i = 0, jsDocComments_2 = jsDocComments; _i < jsDocComments_2.length; _i++) {
+                    var jsDocComment = jsDocComments_2[_i];
+                    for (var _a = 0, _b = jsDocComment.tags; _a < _b.length; _a++) {
+                        var tag = _b[_a];
+                        if (tag.kind === 275) {
+                            var parameterTag = tag;
+                            var name_6 = parameterTag.preParameterName || parameterTag.postParameterName;
+                            if (name_6.text === parameterName) {
+                                return parameterTag;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getCorrespondingJSDocParameterTag = getCorrespondingJSDocParameterTag;
+    function hasRestParameter(s) {
+        return isRestParameter(ts.lastOrUndefined(s.parameters));
+    }
+    ts.hasRestParameter = hasRestParameter;
+    function hasDeclaredRestParameter(s) {
+        return isDeclaredRestParam(ts.lastOrUndefined(s.parameters));
+    }
+    ts.hasDeclaredRestParameter = hasDeclaredRestParameter;
+    function isRestParameter(node) {
+        if (node && (node.flags & 134217728)) {
+            if (node.type && node.type.kind === 270) {
+                return true;
+            }
+            var paramTag = getCorrespondingJSDocParameterTag(node);
+            if (paramTag && paramTag.typeExpression) {
+                return paramTag.typeExpression.type.kind === 270;
+            }
+        }
+        return isDeclaredRestParam(node);
+    }
+    ts.isRestParameter = isRestParameter;
+    function isDeclaredRestParam(node) {
+        return node && node.dotDotDotToken !== undefined;
+    }
+    ts.isDeclaredRestParam = isDeclaredRestParam;
+    function isLiteralKind(kind) {
+        return 8 <= kind && kind <= 11;
+    }
+    ts.isLiteralKind = isLiteralKind;
+    function isTextualLiteralKind(kind) {
+        return kind === 9 || kind === 11;
+    }
+    ts.isTextualLiteralKind = isTextualLiteralKind;
+    function isTemplateLiteralKind(kind) {
+        return 11 <= kind && kind <= 14;
+    }
+    ts.isTemplateLiteralKind = isTemplateLiteralKind;
+    function isBindingPattern(node) {
+        return !!node && (node.kind === 168 || node.kind === 167);
+    }
+    ts.isBindingPattern = isBindingPattern;
+    function isAssignmentTarget(node) {
+        while (node.parent.kind === 178) {
+            node = node.parent;
+        }
+        while (true) {
+            var parent_5 = node.parent;
+            if (parent_5.kind === 170 || parent_5.kind === 191) {
+                node = parent_5;
+                continue;
+            }
+            if (parent_5.kind === 253 || parent_5.kind === 254) {
+                node = parent_5.parent;
+                continue;
+            }
+            return parent_5.kind === 187 &&
+                parent_5.operatorToken.kind === 56 &&
+                parent_5.left === node ||
+                (parent_5.kind === 207 || parent_5.kind === 208) &&
+                    parent_5.initializer === node;
+        }
+    }
+    ts.isAssignmentTarget = isAssignmentTarget;
+    function isNodeDescendentOf(node, ancestor) {
+        while (node) {
+            if (node === ancestor)
+                return true;
+            node = node.parent;
+        }
+        return false;
+    }
+    ts.isNodeDescendentOf = isNodeDescendentOf;
+    function isInAmbientContext(node) {
+        while (node) {
+            if (node.flags & 2 || (node.kind === 256 && node.isDeclarationFile)) {
+                return true;
+            }
+            node = node.parent;
+        }
+        return false;
+    }
+    ts.isInAmbientContext = isInAmbientContext;
+    function isDeclaration(node) {
+        switch (node.kind) {
+            case 180:
+            case 169:
+            case 221:
+            case 192:
+            case 148:
+            case 224:
+            case 255:
+            case 238:
+            case 220:
+            case 179:
+            case 149:
+            case 231:
+            case 229:
+            case 234:
+            case 222:
+            case 147:
+            case 146:
+            case 225:
+            case 232:
+            case 142:
+            case 253:
+            case 145:
+            case 144:
+            case 150:
+            case 254:
+            case 223:
+            case 141:
+            case 218:
+            case 279:
+                return true;
+        }
+        return false;
+    }
+    ts.isDeclaration = isDeclaration;
+    function isStatement(n) {
+        switch (n.kind) {
+            case 210:
+            case 209:
+            case 217:
+            case 204:
+            case 202:
+            case 201:
+            case 207:
+            case 208:
+            case 206:
+            case 203:
+            case 214:
+            case 211:
+            case 213:
+            case 215:
+            case 216:
+            case 200:
+            case 205:
+            case 212:
+            case 235:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isStatement = isStatement;
+    function isClassElement(n) {
+        switch (n.kind) {
+            case 148:
+            case 145:
+            case 147:
+            case 149:
+            case 150:
+            case 146:
+            case 153:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isClassElement = isClassElement;
+    function isDeclarationName(name) {
+        if (name.kind !== 69 && name.kind !== 9 && name.kind !== 8) {
+            return false;
+        }
+        var parent = name.parent;
+        if (parent.kind === 234 || parent.kind === 238) {
+            if (parent.propertyName) {
+                return true;
+            }
+        }
+        if (isDeclaration(parent)) {
+            return parent.name === name;
+        }
+        return false;
+    }
+    ts.isDeclarationName = isDeclarationName;
+    function isLiteralComputedPropertyDeclarationName(node) {
+        return (node.kind === 9 || node.kind === 8) &&
+            node.parent.kind === 140 &&
+            isDeclaration(node.parent.parent);
+    }
+    ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
+    function isIdentifierName(node) {
+        var parent = node.parent;
+        switch (parent.kind) {
+            case 145:
+            case 144:
+            case 147:
+            case 146:
+            case 149:
+            case 150:
+            case 255:
+            case 253:
+            case 172:
+                return parent.name === node;
+            case 139:
+                if (parent.right === node) {
+                    while (parent.kind === 139) {
+                        parent = parent.parent;
+                    }
+                    return parent.kind === 158;
+                }
+                return false;
+            case 169:
+            case 234:
+                return parent.propertyName === node;
+            case 238:
+                return true;
+        }
+        return false;
+    }
+    ts.isIdentifierName = isIdentifierName;
+    function isAliasSymbolDeclaration(node) {
+        return node.kind === 229 ||
+            node.kind === 228 ||
+            node.kind === 231 && !!node.name ||
+            node.kind === 232 ||
+            node.kind === 234 ||
+            node.kind === 238 ||
+            node.kind === 235 && node.expression.kind === 69;
+    }
+    ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
+    function getClassExtendsHeritageClauseElement(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 83);
+        return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
+    }
+    ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
+    function getClassImplementsHeritageClauseElements(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 106);
+        return heritageClause ? heritageClause.types : undefined;
+    }
+    ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
+    function getInterfaceBaseTypeNodes(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 83);
+        return heritageClause ? heritageClause.types : undefined;
+    }
+    ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
+    function getHeritageClause(clauses, kind) {
+        if (clauses) {
+            for (var _i = 0, clauses_1 = clauses; _i < clauses_1.length; _i++) {
+                var clause = clauses_1[_i];
+                if (clause.token === kind) {
+                    return clause;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getHeritageClause = getHeritageClause;
+    function tryResolveScriptReference(host, sourceFile, reference) {
+        if (!host.getCompilerOptions().noResolve) {
+            var referenceFileName = ts.isRootedDiskPath(reference.fileName) ? reference.fileName : ts.combinePaths(ts.getDirectoryPath(sourceFile.fileName), reference.fileName);
+            return host.getSourceFile(referenceFileName);
+        }
+    }
+    ts.tryResolveScriptReference = tryResolveScriptReference;
+    function getAncestor(node, kind) {
+        while (node) {
+            if (node.kind === kind) {
+                return node;
+            }
+            node = node.parent;
+        }
+        return undefined;
+    }
+    ts.getAncestor = getAncestor;
+    function getFileReferenceFromReferencePath(comment, commentRange) {
+        var simpleReferenceRegEx = /^\/\/\/\s*<reference\s+/gim;
+        var isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
+        if (simpleReferenceRegEx.test(comment)) {
+            if (isNoDefaultLibRegEx.test(comment)) {
+                return {
+                    isNoDefaultLib: true
+                };
+            }
+            else {
+                var refMatchResult = ts.fullTripleSlashReferencePathRegEx.exec(comment);
+                var refLibResult = !refMatchResult && ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx.exec(comment);
+                if (refMatchResult || refLibResult) {
+                    var start = commentRange.pos;
+                    var end = commentRange.end;
+                    return {
+                        fileReference: {
+                            pos: start,
+                            end: end,
+                            fileName: (refMatchResult || refLibResult)[3]
+                        },
+                        isNoDefaultLib: false,
+                        isTypeReferenceDirective: !!refLibResult
+                    };
+                }
+                return {
+                    diagnosticMessage: ts.Diagnostics.Invalid_reference_directive_syntax,
+                    isNoDefaultLib: false
+                };
+            }
+        }
+        return undefined;
+    }
+    ts.getFileReferenceFromReferencePath = getFileReferenceFromReferencePath;
+    function isKeyword(token) {
+        return 70 <= token && token <= 138;
+    }
+    ts.isKeyword = isKeyword;
+    function isTrivia(token) {
+        return 2 <= token && token <= 7;
+    }
+    ts.isTrivia = isTrivia;
+    function isAsyncFunctionLike(node) {
+        return isFunctionLike(node) && (node.flags & 256) !== 0 && !isAccessor(node);
+    }
+    ts.isAsyncFunctionLike = isAsyncFunctionLike;
+    function isStringOrNumericLiteral(kind) {
+        return kind === 9 || kind === 8;
+    }
+    ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
+    function hasDynamicName(declaration) {
+        return declaration.name && isDynamicName(declaration.name);
+    }
+    ts.hasDynamicName = hasDynamicName;
+    function isDynamicName(name) {
+        return name.kind === 140 &&
+            !isStringOrNumericLiteral(name.expression.kind) &&
+            !isWellKnownSymbolSyntactically(name.expression);
+    }
+    ts.isDynamicName = isDynamicName;
+    function isWellKnownSymbolSyntactically(node) {
+        return isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
+    }
+    ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
+    function getPropertyNameForPropertyNameNode(name) {
+        if (name.kind === 69 || name.kind === 9 || name.kind === 8 || name.kind === 142) {
+            return name.text;
+        }
+        if (name.kind === 140) {
+            var nameExpression = name.expression;
+            if (isWellKnownSymbolSyntactically(nameExpression)) {
+                var rightHandSideName = nameExpression.name.text;
+                return getPropertyNameForKnownSymbolName(rightHandSideName);
+            }
+            else if (nameExpression.kind === 9 || nameExpression.kind === 8) {
+                return nameExpression.text;
+            }
+        }
+        return undefined;
+    }
+    ts.getPropertyNameForPropertyNameNode = getPropertyNameForPropertyNameNode;
+    function getPropertyNameForKnownSymbolName(symbolName) {
+        return "__@" + symbolName;
+    }
+    ts.getPropertyNameForKnownSymbolName = getPropertyNameForKnownSymbolName;
+    function isESSymbolIdentifier(node) {
+        return node.kind === 69 && node.text === "Symbol";
+    }
+    ts.isESSymbolIdentifier = isESSymbolIdentifier;
+    function isModifierKind(token) {
+        switch (token) {
+            case 115:
+            case 118:
+            case 74:
+            case 122:
+            case 77:
+            case 82:
+            case 112:
+            case 110:
+            case 111:
+            case 128:
+            case 113:
+                return true;
+        }
+        return false;
+    }
+    ts.isModifierKind = isModifierKind;
+    function isParameterDeclaration(node) {
+        var root = getRootDeclaration(node);
+        return root.kind === 142;
+    }
+    ts.isParameterDeclaration = isParameterDeclaration;
+    function getRootDeclaration(node) {
+        while (node.kind === 169) {
+            node = node.parent.parent;
+        }
+        return node;
+    }
+    ts.getRootDeclaration = getRootDeclaration;
+    function nodeStartsNewLexicalEnvironment(n) {
+        return isFunctionLike(n) || n.kind === 225 || n.kind === 256;
+    }
+    ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
+    function cloneNode(node, location, flags, parent) {
+        var clone = location !== undefined
+            ? ts.createNode(node.kind, location.pos, location.end)
+            : createSynthesizedNode(node.kind);
+        for (var key in node) {
+            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
+                continue;
+            }
+            clone[key] = node[key];
+        }
+        if (flags !== undefined) {
+            clone.flags = flags;
+        }
+        if (parent !== undefined) {
+            clone.parent = parent;
+        }
+        return clone;
+    }
+    ts.cloneNode = cloneNode;
+    function cloneEntityName(node, parent) {
+        var clone = cloneNode(node, node, node.flags, parent);
+        if (isQualifiedName(clone)) {
+            var left = clone.left, right = clone.right;
+            clone.left = cloneEntityName(left, clone);
+            clone.right = cloneNode(right, right, right.flags, parent);
+        }
+        return clone;
+    }
+    ts.cloneEntityName = cloneEntityName;
+    function isQualifiedName(node) {
+        return node.kind === 139;
+    }
+    ts.isQualifiedName = isQualifiedName;
+    function nodeIsSynthesized(node) {
+        return node.pos === -1;
+    }
+    ts.nodeIsSynthesized = nodeIsSynthesized;
+    function createSynthesizedNode(kind, startsOnNewLine) {
+        var node = ts.createNode(kind, -1, -1);
+        node.startsOnNewLine = startsOnNewLine;
+        return node;
+    }
+    ts.createSynthesizedNode = createSynthesizedNode;
+    function createSynthesizedNodeArray() {
+        var array = [];
+        array.pos = -1;
+        array.end = -1;
+        return array;
+    }
+    ts.createSynthesizedNodeArray = createSynthesizedNodeArray;
+    function createDiagnosticCollection() {
+        var nonFileDiagnostics = [];
+        var fileDiagnostics = {};
+        var diagnosticsModified = false;
+        var modificationCount = 0;
+        return {
+            add: add,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getDiagnostics: getDiagnostics,
+            getModificationCount: getModificationCount,
+            reattachFileDiagnostics: reattachFileDiagnostics
+        };
+        function getModificationCount() {
+            return modificationCount;
+        }
+        function reattachFileDiagnostics(newFile) {
+            if (!ts.hasProperty(fileDiagnostics, newFile.fileName)) {
+                return;
+            }
+            for (var _i = 0, _a = fileDiagnostics[newFile.fileName]; _i < _a.length; _i++) {
+                var diagnostic = _a[_i];
+                diagnostic.file = newFile;
+            }
+        }
+        function add(diagnostic) {
+            var diagnostics;
+            if (diagnostic.file) {
+                diagnostics = fileDiagnostics[diagnostic.file.fileName];
+                if (!diagnostics) {
+                    diagnostics = [];
+                    fileDiagnostics[diagnostic.file.fileName] = diagnostics;
+                }
+            }
+            else {
+                diagnostics = nonFileDiagnostics;
+            }
+            diagnostics.push(diagnostic);
+            diagnosticsModified = true;
+            modificationCount++;
+        }
+        function getGlobalDiagnostics() {
+            sortAndDeduplicate();
+            return nonFileDiagnostics;
+        }
+        function getDiagnostics(fileName) {
+            sortAndDeduplicate();
+            if (fileName) {
+                return fileDiagnostics[fileName] || [];
+            }
+            var allDiagnostics = [];
+            function pushDiagnostic(d) {
+                allDiagnostics.push(d);
+            }
+            ts.forEach(nonFileDiagnostics, pushDiagnostic);
+            for (var key in fileDiagnostics) {
+                if (ts.hasProperty(fileDiagnostics, key)) {
+                    ts.forEach(fileDiagnostics[key], pushDiagnostic);
+                }
+            }
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function sortAndDeduplicate() {
+            if (!diagnosticsModified) {
+                return;
+            }
+            diagnosticsModified = false;
+            nonFileDiagnostics = ts.sortAndDeduplicateDiagnostics(nonFileDiagnostics);
+            for (var key in fileDiagnostics) {
+                if (ts.hasProperty(fileDiagnostics, key)) {
+                    fileDiagnostics[key] = ts.sortAndDeduplicateDiagnostics(fileDiagnostics[key]);
+                }
+            }
+        }
+    }
+    ts.createDiagnosticCollection = createDiagnosticCollection;
+    var escapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
+    var escapedCharsMap = {
+        "\0": "\\0",
+        "\t": "\\t",
+        "\v": "\\v",
+        "\f": "\\f",
+        "\b": "\\b",
+        "\r": "\\r",
+        "\n": "\\n",
+        "\\": "\\\\",
+        "\"": "\\\"",
+        "\u2028": "\\u2028",
+        "\u2029": "\\u2029",
+        "\u0085": "\\u0085"
+    };
+    function escapeString(s) {
+        s = escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, getReplacement) : s;
+        return s;
+        function getReplacement(c) {
+            return escapedCharsMap[c] || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
+        }
+    }
+    ts.escapeString = escapeString;
+    function isIntrinsicJsxName(name) {
+        var ch = name.substr(0, 1);
+        return ch.toLowerCase() === ch;
+    }
+    ts.isIntrinsicJsxName = isIntrinsicJsxName;
+    function get16BitUnicodeEscapeSequence(charCode) {
+        var hexCharCode = charCode.toString(16).toUpperCase();
+        var paddedHexCode = ("0000" + hexCharCode).slice(-4);
+        return "\\u" + paddedHexCode;
+    }
+    var nonAsciiCharacters = /[^\u0000-\u007F]/g;
+    function escapeNonAsciiCharacters(s) {
+        return nonAsciiCharacters.test(s) ?
+            s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
+            s;
+    }
+    ts.escapeNonAsciiCharacters = escapeNonAsciiCharacters;
+    var indentStrings = ["", "    "];
+    function getIndentString(level) {
+        if (indentStrings[level] === undefined) {
+            indentStrings[level] = getIndentString(level - 1) + indentStrings[1];
+        }
+        return indentStrings[level];
+    }
+    ts.getIndentString = getIndentString;
+    function getIndentSize() {
+        return indentStrings[1].length;
+    }
+    ts.getIndentSize = getIndentSize;
+    function createTextWriter(newLine) {
+        var output;
+        var indent;
+        var lineStart;
+        var lineCount;
+        var linePos;
+        function write(s) {
+            if (s && s.length) {
+                if (lineStart) {
+                    output += getIndentString(indent);
+                    lineStart = false;
+                }
+                output += s;
+            }
+        }
+        function reset() {
+            output = "";
+            indent = 0;
+            lineStart = true;
+            lineCount = 0;
+            linePos = 0;
+        }
+        function rawWrite(s) {
+            if (s !== undefined) {
+                if (lineStart) {
+                    lineStart = false;
+                }
+                output += s;
+            }
+        }
+        function writeLiteral(s) {
+            if (s && s.length) {
+                write(s);
+                var lineStartsOfS = ts.computeLineStarts(s);
+                if (lineStartsOfS.length > 1) {
+                    lineCount = lineCount + lineStartsOfS.length - 1;
+                    linePos = output.length - s.length + ts.lastOrUndefined(lineStartsOfS);
+                }
+            }
+        }
+        function writeLine() {
+            if (!lineStart) {
+                output += newLine;
+                lineCount++;
+                linePos = output.length;
+                lineStart = true;
+            }
+        }
+        function writeTextOfNode(text, node) {
+            write(getTextOfNodeFromSourceText(text, node));
+        }
+        reset();
+        return {
+            write: write,
+            rawWrite: rawWrite,
+            writeTextOfNode: writeTextOfNode,
+            writeLiteral: writeLiteral,
+            writeLine: writeLine,
+            increaseIndent: function () { indent++; },
+            decreaseIndent: function () { indent--; },
+            getIndent: function () { return indent; },
+            getTextPos: function () { return output.length; },
+            getLine: function () { return lineCount + 1; },
+            getColumn: function () { return lineStart ? indent * getIndentSize() + 1 : output.length - linePos + 1; },
+            getText: function () { return output; },
+            reset: reset
+        };
+    }
+    ts.createTextWriter = createTextWriter;
+    function getExternalModuleNameFromPath(host, fileName) {
+        var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
+        var dir = ts.toPath(host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
+        var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
+        var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, false);
+        return ts.removeFileExtension(relativePath);
+    }
+    ts.getExternalModuleNameFromPath = getExternalModuleNameFromPath;
+    function getOwnEmitOutputFilePath(sourceFile, host, extension) {
+        var compilerOptions = host.getCompilerOptions();
+        var emitOutputFilePathWithoutExtension;
+        if (compilerOptions.outDir) {
+            emitOutputFilePathWithoutExtension = ts.removeFileExtension(getSourceFilePathInNewDir(sourceFile, host, compilerOptions.outDir));
+        }
+        else {
+            emitOutputFilePathWithoutExtension = ts.removeFileExtension(sourceFile.fileName);
+        }
+        return emitOutputFilePathWithoutExtension + extension;
+    }
+    ts.getOwnEmitOutputFilePath = getOwnEmitOutputFilePath;
+    function getDeclarationEmitOutputFilePath(sourceFile, host) {
+        var options = host.getCompilerOptions();
+        var outputDir = options.declarationDir || options.outDir;
+        if (options.declaration) {
+            var path = outputDir
+                ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
+                : sourceFile.fileName;
+            return ts.removeFileExtension(path) + ".d.ts";
+        }
+    }
+    ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
+    function getEmitScriptTarget(compilerOptions) {
+        return compilerOptions.target || 0;
+    }
+    ts.getEmitScriptTarget = getEmitScriptTarget;
+    function getEmitModuleKind(compilerOptions) {
+        return typeof compilerOptions.module === "number" ?
+            compilerOptions.module :
+            getEmitScriptTarget(compilerOptions) === 2 ? ts.ModuleKind.ES6 : ts.ModuleKind.CommonJS;
+    }
+    ts.getEmitModuleKind = getEmitModuleKind;
+    function forEachExpectedEmitFile(host, action, targetSourceFile) {
+        var options = host.getCompilerOptions();
+        if (options.outFile || options.out) {
+            onBundledEmit(host);
+        }
+        else {
+            var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
+            for (var _i = 0, sourceFiles_1 = sourceFiles; _i < sourceFiles_1.length; _i++) {
+                var sourceFile = sourceFiles_1[_i];
+                if (!isDeclarationFile(sourceFile)) {
+                    onSingleFileEmit(host, sourceFile);
+                }
+            }
+        }
+        function onSingleFileEmit(host, sourceFile) {
+            var extension = ".js";
+            if (options.jsx === 1) {
+                if (isSourceFileJavaScript(sourceFile)) {
+                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
+                        extension = ".jsx";
+                    }
+                }
+                else if (sourceFile.languageVariant === 1) {
+                    extension = ".jsx";
+                }
+            }
+            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
+            var emitFileNames = {
+                jsFilePath: jsFilePath,
+                sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
+                declarationFilePath: !isSourceFileJavaScript(sourceFile) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined
+            };
+            action(emitFileNames, [sourceFile], false);
+        }
+        function onBundledEmit(host) {
+            var bundledSources = ts.filter(host.getSourceFiles(), function (sourceFile) {
+                return !isDeclarationFile(sourceFile)
+                    && (!ts.isExternalModule(sourceFile) || !!getEmitModuleKind(options));
+            });
+            if (bundledSources.length) {
+                var jsFilePath = options.outFile || options.out;
+                var emitFileNames = {
+                    jsFilePath: jsFilePath,
+                    sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
+                    declarationFilePath: options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined
+                };
+                action(emitFileNames, bundledSources, true);
+            }
+        }
+        function getSourceMapFilePath(jsFilePath, options) {
+            return options.sourceMap ? jsFilePath + ".map" : undefined;
+        }
+    }
+    ts.forEachExpectedEmitFile = forEachExpectedEmitFile;
+    function getSourceFilePathInNewDir(sourceFile, host, newDirPath) {
+        var sourceFilePath = ts.getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
+        sourceFilePath = sourceFilePath.replace(host.getCommonSourceDirectory(), "");
+        return ts.combinePaths(newDirPath, sourceFilePath);
+    }
+    ts.getSourceFilePathInNewDir = getSourceFilePathInNewDir;
+    function writeFile(host, diagnostics, fileName, data, writeByteOrderMark, sourceFiles) {
+        host.writeFile(fileName, data, writeByteOrderMark, function (hostErrorMessage) {
+            diagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Could_not_write_file_0_Colon_1, fileName, hostErrorMessage));
+        }, sourceFiles);
+    }
+    ts.writeFile = writeFile;
+    function getLineOfLocalPosition(currentSourceFile, pos) {
+        return ts.getLineAndCharacterOfPosition(currentSourceFile, pos).line;
+    }
+    ts.getLineOfLocalPosition = getLineOfLocalPosition;
+    function getLineOfLocalPositionFromLineMap(lineMap, pos) {
+        return ts.computeLineAndCharacterOfPosition(lineMap, pos).line;
+    }
+    ts.getLineOfLocalPositionFromLineMap = getLineOfLocalPositionFromLineMap;
+    function getFirstConstructorWithBody(node) {
+        return ts.forEach(node.members, function (member) {
+            if (member.kind === 148 && nodeIsPresent(member.body)) {
+                return member;
+            }
+        });
+    }
+    ts.getFirstConstructorWithBody = getFirstConstructorWithBody;
+    function getSetAccessorTypeAnnotationNode(accessor) {
+        if (accessor && accessor.parameters.length > 0) {
+            var hasThis = accessor.parameters.length === 2 &&
+                accessor.parameters[0].name.kind === 69 &&
+                accessor.parameters[0].name.originalKeywordKind === 97;
+            return accessor.parameters[hasThis ? 1 : 0].type;
+        }
+    }
+    ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
+    function getAllAccessorDeclarations(declarations, accessor) {
+        var firstAccessor;
+        var secondAccessor;
+        var getAccessor;
+        var setAccessor;
+        if (hasDynamicName(accessor)) {
+            firstAccessor = accessor;
+            if (accessor.kind === 149) {
+                getAccessor = accessor;
+            }
+            else if (accessor.kind === 150) {
+                setAccessor = accessor;
+            }
+            else {
+                ts.Debug.fail("Accessor has wrong kind");
+            }
+        }
+        else {
+            ts.forEach(declarations, function (member) {
+                if ((member.kind === 149 || member.kind === 150)
+                    && (member.flags & 32) === (accessor.flags & 32)) {
+                    var memberName = getPropertyNameForPropertyNameNode(member.name);
+                    var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
+                    if (memberName === accessorName) {
+                        if (!firstAccessor) {
+                            firstAccessor = member;
+                        }
+                        else if (!secondAccessor) {
+                            secondAccessor = member;
+                        }
+                        if (member.kind === 149 && !getAccessor) {
+                            getAccessor = member;
+                        }
+                        if (member.kind === 150 && !setAccessor) {
+                            setAccessor = member;
+                        }
+                    }
+                }
+            });
+        }
+        return {
+            firstAccessor: firstAccessor,
+            secondAccessor: secondAccessor,
+            getAccessor: getAccessor,
+            setAccessor: setAccessor
+        };
+    }
+    ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
+    function emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments) {
+        if (leadingComments && leadingComments.length && node.pos !== leadingComments[0].pos &&
+            getLineOfLocalPositionFromLineMap(lineMap, node.pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
+            writer.writeLine();
+        }
+    }
+    ts.emitNewLineBeforeLeadingComments = emitNewLineBeforeLeadingComments;
+    function emitComments(text, lineMap, writer, comments, trailingSeparator, newLine, writeComment) {
+        var emitLeadingSpace = !trailingSeparator;
+        ts.forEach(comments, function (comment) {
+            if (emitLeadingSpace) {
+                writer.write(" ");
+                emitLeadingSpace = false;
+            }
+            writeComment(text, lineMap, writer, comment, newLine);
+            if (comment.hasTrailingNewLine) {
+                writer.writeLine();
+            }
+            else if (trailingSeparator) {
+                writer.write(" ");
+            }
+            else {
+                emitLeadingSpace = true;
+            }
+        });
+    }
+    ts.emitComments = emitComments;
+    function emitDetachedComments(text, lineMap, writer, writeComment, node, newLine, removeComments) {
+        var leadingComments;
+        var currentDetachedCommentInfo;
+        if (removeComments) {
+            if (node.pos === 0) {
+                leadingComments = ts.filter(ts.getLeadingCommentRanges(text, node.pos), isPinnedComment);
+            }
+        }
+        else {
+            leadingComments = ts.getLeadingCommentRanges(text, node.pos);
+        }
+        if (leadingComments) {
+            var detachedComments = [];
+            var lastComment = void 0;
+            for (var _i = 0, leadingComments_1 = leadingComments; _i < leadingComments_1.length; _i++) {
+                var comment = leadingComments_1[_i];
+                if (lastComment) {
+                    var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, lastComment.end);
+                    var commentLine = getLineOfLocalPositionFromLineMap(lineMap, comment.pos);
+                    if (commentLine >= lastCommentLine + 2) {
+                        break;
+                    }
+                }
+                detachedComments.push(comment);
+                lastComment = comment;
+            }
+            if (detachedComments.length) {
+                var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, ts.lastOrUndefined(detachedComments).end);
+                var nodeLine = getLineOfLocalPositionFromLineMap(lineMap, ts.skipTrivia(text, node.pos));
+                if (nodeLine >= lastCommentLine + 2) {
+                    emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments);
+                    emitComments(text, lineMap, writer, detachedComments, true, newLine, writeComment);
+                    currentDetachedCommentInfo = { nodePos: node.pos, detachedCommentEndPos: ts.lastOrUndefined(detachedComments).end };
+                }
+            }
+        }
+        return currentDetachedCommentInfo;
+        function isPinnedComment(comment) {
+            return text.charCodeAt(comment.pos + 1) === 42 &&
+                text.charCodeAt(comment.pos + 2) === 33;
+        }
+    }
+    ts.emitDetachedComments = emitDetachedComments;
+    function writeCommentRange(text, lineMap, writer, comment, newLine) {
+        if (text.charCodeAt(comment.pos + 1) === 42) {
+            var firstCommentLineAndCharacter = ts.computeLineAndCharacterOfPosition(lineMap, comment.pos);
+            var lineCount = lineMap.length;
+            var firstCommentLineIndent = void 0;
+            for (var pos = comment.pos, currentLine = firstCommentLineAndCharacter.line; pos < comment.end; currentLine++) {
+                var nextLineStart = (currentLine + 1) === lineCount
+                    ? text.length + 1
+                    : lineMap[currentLine + 1];
+                if (pos !== comment.pos) {
+                    if (firstCommentLineIndent === undefined) {
+                        firstCommentLineIndent = calculateIndent(text, lineMap[firstCommentLineAndCharacter.line], comment.pos);
+                    }
+                    var currentWriterIndentSpacing = writer.getIndent() * getIndentSize();
+                    var spacesToEmit = currentWriterIndentSpacing - firstCommentLineIndent + calculateIndent(text, pos, nextLineStart);
+                    if (spacesToEmit > 0) {
+                        var numberOfSingleSpacesToEmit = spacesToEmit % getIndentSize();
+                        var indentSizeSpaceString = getIndentString((spacesToEmit - numberOfSingleSpacesToEmit) / getIndentSize());
+                        writer.rawWrite(indentSizeSpaceString);
+                        while (numberOfSingleSpacesToEmit) {
+                            writer.rawWrite(" ");
+                            numberOfSingleSpacesToEmit--;
+                        }
+                    }
+                    else {
+                        writer.rawWrite("");
+                    }
+                }
+                writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart);
+                pos = nextLineStart;
+            }
+        }
+        else {
+            writer.write(text.substring(comment.pos, comment.end));
+        }
+    }
+    ts.writeCommentRange = writeCommentRange;
+    function writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart) {
+        var end = Math.min(comment.end, nextLineStart - 1);
+        var currentLineText = text.substring(pos, end).replace(/^\s+|\s+$/g, "");
+        if (currentLineText) {
+            writer.write(currentLineText);
+            if (end !== comment.end) {
+                writer.writeLine();
+            }
+        }
+        else {
+            writer.writeLiteral(newLine);
+        }
+    }
+    function calculateIndent(text, pos, end) {
+        var currentLineIndent = 0;
+        for (; pos < end && ts.isWhiteSpace(text.charCodeAt(pos)); pos++) {
+            if (text.charCodeAt(pos) === 9) {
+                currentLineIndent += getIndentSize() - (currentLineIndent % getIndentSize());
+            }
+            else {
+                currentLineIndent++;
+            }
+        }
+        return currentLineIndent;
+    }
+    function modifierToFlag(token) {
+        switch (token) {
+            case 113: return 32;
+            case 112: return 4;
+            case 111: return 16;
+            case 110: return 8;
+            case 115: return 128;
+            case 82: return 1;
+            case 122: return 2;
+            case 74: return 2048;
+            case 77: return 512;
+            case 118: return 256;
+            case 128: return 64;
+        }
+        return 0;
+    }
+    ts.modifierToFlag = modifierToFlag;
+    function isLeftHandSideExpression(expr) {
+        if (expr) {
+            switch (expr.kind) {
+                case 172:
+                case 173:
+                case 175:
+                case 174:
+                case 196:
+                case 241:
+                case 242:
+                case 176:
+                case 170:
+                case 178:
+                case 171:
+                case 192:
+                case 179:
+                case 69:
+                case 10:
+                case 8:
+                case 9:
+                case 11:
+                case 189:
+                case 84:
+                case 93:
+                case 97:
+                case 99:
+                case 95:
+                    return true;
+            }
+        }
+        return false;
+    }
+    ts.isLeftHandSideExpression = isLeftHandSideExpression;
+    function isAssignmentOperator(token) {
+        return token >= 56 && token <= 68;
+    }
+    ts.isAssignmentOperator = isAssignmentOperator;
+    function isExpressionWithTypeArgumentsInClassExtendsClause(node) {
+        return node.kind === 194 &&
+            node.parent.token === 83 &&
+            isClassLike(node.parent.parent);
+    }
+    ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
+    function isSupportedExpressionWithTypeArguments(node) {
+        return isSupportedExpressionWithTypeArgumentsRest(node.expression);
+    }
+    ts.isSupportedExpressionWithTypeArguments = isSupportedExpressionWithTypeArguments;
+    function isSupportedExpressionWithTypeArgumentsRest(node) {
+        if (node.kind === 69) {
+            return true;
+        }
+        else if (isPropertyAccessExpression(node)) {
+            return isSupportedExpressionWithTypeArgumentsRest(node.expression);
+        }
+        else {
+            return false;
+        }
+    }
+    function isRightSideOfQualifiedNameOrPropertyAccess(node) {
+        return (node.parent.kind === 139 && node.parent.right === node) ||
+            (node.parent.kind === 172 && node.parent.name === node);
+    }
+    ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
+    function isEmptyObjectLiteralOrArrayLiteral(expression) {
+        var kind = expression.kind;
+        if (kind === 171) {
+            return expression.properties.length === 0;
+        }
+        if (kind === 170) {
+            return expression.elements.length === 0;
+        }
+        return false;
+    }
+    ts.isEmptyObjectLiteralOrArrayLiteral = isEmptyObjectLiteralOrArrayLiteral;
+    function getLocalSymbolForExportDefault(symbol) {
+        return symbol && symbol.valueDeclaration && (symbol.valueDeclaration.flags & 512) ? symbol.valueDeclaration.localSymbol : undefined;
+    }
+    ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
+    function hasJavaScriptFileExtension(fileName) {
+        return ts.forEach(ts.supportedJavascriptExtensions, function (extension) { return ts.fileExtensionIs(fileName, extension); });
+    }
+    ts.hasJavaScriptFileExtension = hasJavaScriptFileExtension;
+    function getExpandedCharCodes(input) {
+        var output = [];
+        var length = input.length;
+        for (var i = 0; i < length; i++) {
+            var charCode = input.charCodeAt(i);
+            if (charCode < 0x80) {
+                output.push(charCode);
+            }
+            else if (charCode < 0x800) {
+                output.push((charCode >> 6) | 192);
+                output.push((charCode & 63) | 128);
+            }
+            else if (charCode < 0x10000) {
+                output.push((charCode >> 12) | 224);
+                output.push(((charCode >> 6) & 63) | 128);
+                output.push((charCode & 63) | 128);
+            }
+            else if (charCode < 0x20000) {
+                output.push((charCode >> 18) | 240);
+                output.push(((charCode >> 12) & 63) | 128);
+                output.push(((charCode >> 6) & 63) | 128);
+                output.push((charCode & 63) | 128);
+            }
+            else {
+                ts.Debug.assert(false, "Unexpected code point");
+            }
+        }
+        return output;
+    }
+    ts.stringify = typeof JSON !== "undefined" && JSON.stringify
+        ? JSON.stringify
+        : stringifyFallback;
+    function stringifyFallback(value) {
+        return value === undefined ? undefined : stringifyValue(value);
+    }
+    function stringifyValue(value) {
+        return typeof value === "string" ? "\"" + escapeString(value) + "\""
+            : typeof value === "number" ? isFinite(value) ? String(value) : "null"
+                : typeof value === "boolean" ? value ? "true" : "false"
+                    : typeof value === "object" && value ? ts.isArray(value) ? cycleCheck(stringifyArray, value) : cycleCheck(stringifyObject, value)
+                        : "null";
+    }
+    function cycleCheck(cb, value) {
+        ts.Debug.assert(!value.hasOwnProperty("__cycle"), "Converting circular structure to JSON");
+        value.__cycle = true;
+        var result = cb(value);
+        delete value.__cycle;
+        return result;
+    }
+    function stringifyArray(value) {
+        return "[" + ts.reduceLeft(value, stringifyElement, "") + "]";
+    }
+    function stringifyElement(memo, value) {
+        return (memo ? memo + "," : memo) + stringifyValue(value);
+    }
+    function stringifyObject(value) {
+        return "{" + ts.reduceProperties(value, stringifyProperty, "") + "}";
+    }
+    function stringifyProperty(memo, value, key) {
+        return value === undefined || typeof value === "function" || key === "__cycle" ? memo
+            : (memo ? memo + "," : memo) + ("\"" + escapeString(key) + "\":" + stringifyValue(value));
+    }
+    var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+    function convertToBase64(input) {
+        var result = "";
+        var charCodes = getExpandedCharCodes(input);
+        var i = 0;
+        var length = charCodes.length;
+        var byte1, byte2, byte3, byte4;
+        while (i < length) {
+            byte1 = charCodes[i] >> 2;
+            byte2 = (charCodes[i] & 3) << 4 | charCodes[i + 1] >> 4;
+            byte3 = (charCodes[i + 1] & 15) << 2 | charCodes[i + 2] >> 6;
+            byte4 = charCodes[i + 2] & 63;
+            if (i + 1 >= length) {
+                byte3 = byte4 = 64;
+            }
+            else if (i + 2 >= length) {
+                byte4 = 64;
+            }
+            result += base64Digits.charAt(byte1) + base64Digits.charAt(byte2) + base64Digits.charAt(byte3) + base64Digits.charAt(byte4);
+            i += 3;
+        }
+        return result;
+    }
+    ts.convertToBase64 = convertToBase64;
+    function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
+        return !ts.isRootedDiskPath(absoluteOrRelativePath)
+            ? absoluteOrRelativePath
+            : ts.getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, false);
+    }
+    ts.convertToRelativePath = convertToRelativePath;
+    var carriageReturnLineFeed = "\r\n";
+    var lineFeed = "\n";
+    function getNewLineCharacter(options) {
+        if (options.newLine === 0) {
+            return carriageReturnLineFeed;
+        }
+        else if (options.newLine === 1) {
+            return lineFeed;
+        }
+        else if (ts.sys) {
+            return ts.sys.newLine;
+        }
+        return carriageReturnLineFeed;
+    }
+    ts.getNewLineCharacter = getNewLineCharacter;
+    function isWatchSet(options) {
+        return options.watch && options.hasOwnProperty("watch");
+    }
+    ts.isWatchSet = isWatchSet;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getDefaultLibFileName(options) {
+        return options.target === 2 ? "lib.es6.d.ts" : "lib.d.ts";
+    }
+    ts.getDefaultLibFileName = getDefaultLibFileName;
+    function textSpanEnd(span) {
+        return span.start + span.length;
+    }
+    ts.textSpanEnd = textSpanEnd;
+    function textSpanIsEmpty(span) {
+        return span.length === 0;
+    }
+    ts.textSpanIsEmpty = textSpanIsEmpty;
+    function textSpanContainsPosition(span, position) {
+        return position >= span.start && position < textSpanEnd(span);
+    }
+    ts.textSpanContainsPosition = textSpanContainsPosition;
+    function textSpanContainsTextSpan(span, other) {
+        return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
+    }
+    ts.textSpanContainsTextSpan = textSpanContainsTextSpan;
+    function textSpanOverlapsWith(span, other) {
+        var overlapStart = Math.max(span.start, other.start);
+        var overlapEnd = Math.min(textSpanEnd(span), textSpanEnd(other));
+        return overlapStart < overlapEnd;
+    }
+    ts.textSpanOverlapsWith = textSpanOverlapsWith;
+    function textSpanOverlap(span1, span2) {
+        var overlapStart = Math.max(span1.start, span2.start);
+        var overlapEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
+        if (overlapStart < overlapEnd) {
+            return createTextSpanFromBounds(overlapStart, overlapEnd);
+        }
+        return undefined;
+    }
+    ts.textSpanOverlap = textSpanOverlap;
+    function textSpanIntersectsWithTextSpan(span, other) {
+        return other.start <= textSpanEnd(span) && textSpanEnd(other) >= span.start;
+    }
+    ts.textSpanIntersectsWithTextSpan = textSpanIntersectsWithTextSpan;
+    function textSpanIntersectsWith(span, start, length) {
+        var end = start + length;
+        return start <= textSpanEnd(span) && end >= span.start;
+    }
+    ts.textSpanIntersectsWith = textSpanIntersectsWith;
+    function decodedTextSpanIntersectsWith(start1, length1, start2, length2) {
+        var end1 = start1 + length1;
+        var end2 = start2 + length2;
+        return start2 <= end1 && end2 >= start1;
+    }
+    ts.decodedTextSpanIntersectsWith = decodedTextSpanIntersectsWith;
+    function textSpanIntersectsWithPosition(span, position) {
+        return position <= textSpanEnd(span) && position >= span.start;
+    }
+    ts.textSpanIntersectsWithPosition = textSpanIntersectsWithPosition;
+    function textSpanIntersection(span1, span2) {
+        var intersectStart = Math.max(span1.start, span2.start);
+        var intersectEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
+        if (intersectStart <= intersectEnd) {
+            return createTextSpanFromBounds(intersectStart, intersectEnd);
+        }
+        return undefined;
+    }
+    ts.textSpanIntersection = textSpanIntersection;
+    function createTextSpan(start, length) {
+        if (start < 0) {
+            throw new Error("start < 0");
+        }
+        if (length < 0) {
+            throw new Error("length < 0");
+        }
+        return { start: start, length: length };
+    }
+    ts.createTextSpan = createTextSpan;
+    function createTextSpanFromBounds(start, end) {
+        return createTextSpan(start, end - start);
+    }
+    ts.createTextSpanFromBounds = createTextSpanFromBounds;
+    function textChangeRangeNewSpan(range) {
+        return createTextSpan(range.span.start, range.newLength);
+    }
+    ts.textChangeRangeNewSpan = textChangeRangeNewSpan;
+    function textChangeRangeIsUnchanged(range) {
+        return textSpanIsEmpty(range.span) && range.newLength === 0;
+    }
+    ts.textChangeRangeIsUnchanged = textChangeRangeIsUnchanged;
+    function createTextChangeRange(span, newLength) {
+        if (newLength < 0) {
+            throw new Error("newLength < 0");
+        }
+        return { span: span, newLength: newLength };
+    }
+    ts.createTextChangeRange = createTextChangeRange;
+    ts.unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
+    function collapseTextChangeRangesAcrossMultipleVersions(changes) {
+        if (changes.length === 0) {
+            return ts.unchangedTextChangeRange;
+        }
+        if (changes.length === 1) {
+            return changes[0];
+        }
+        var change0 = changes[0];
+        var oldStartN = change0.span.start;
+        var oldEndN = textSpanEnd(change0.span);
+        var newEndN = oldStartN + change0.newLength;
+        for (var i = 1; i < changes.length; i++) {
+            var nextChange = changes[i];
+            var oldStart1 = oldStartN;
+            var oldEnd1 = oldEndN;
+            var newEnd1 = newEndN;
+            var oldStart2 = nextChange.span.start;
+            var oldEnd2 = textSpanEnd(nextChange.span);
+            var newEnd2 = oldStart2 + nextChange.newLength;
+            oldStartN = Math.min(oldStart1, oldStart2);
+            oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
+            newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
+        }
+        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), newEndN - oldStartN);
+    }
+    ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
+    function getTypeParameterOwner(d) {
+        if (d && d.kind === 141) {
+            for (var current = d; current; current = current.parent) {
+                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 222) {
+                    return current;
+                }
+            }
+        }
+    }
+    ts.getTypeParameterOwner = getTypeParameterOwner;
+    function isParameterPropertyDeclaration(node) {
+        return node.flags & 92 && node.parent.kind === 148 && ts.isClassLike(node.parent.parent);
+    }
+    ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
+    function startsWith(str, prefix) {
+        return str.lastIndexOf(prefix, 0) === 0;
+    }
+    ts.startsWith = startsWith;
+    function endsWith(str, suffix) {
+        var expectedPos = str.length - suffix.length;
+        return str.indexOf(suffix, expectedPos) === expectedPos;
+    }
+    ts.endsWith = endsWith;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.parseTime = 0;
+    var NodeConstructor;
+    var SourceFileConstructor;
+    function createNode(kind, pos, end) {
+        if (kind === 256) {
+            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
+        }
+        else {
+            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
+        }
+    }
+    ts.createNode = createNode;
+    function visitNode(cbNode, node) {
+        if (node) {
+            return cbNode(node);
+        }
+    }
+    function visitNodeArray(cbNodes, nodes) {
+        if (nodes) {
+            return cbNodes(nodes);
+        }
+    }
+    function visitEachNode(cbNode, nodes) {
+        if (nodes) {
+            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
+                var node = nodes_1[_i];
+                var result = cbNode(node);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+    }
+    function forEachChild(node, cbNode, cbNodeArray) {
+        if (!node) {
+            return;
+        }
+        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
+        var cbNodes = cbNodeArray || cbNode;
+        switch (node.kind) {
+            case 139:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.right);
+            case 141:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.constraint) ||
+                    visitNode(cbNode, node.expression);
+            case 254:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.equalsToken) ||
+                    visitNode(cbNode, node.objectAssignmentInitializer);
+            case 142:
+            case 145:
+            case 144:
+            case 253:
+            case 218:
+            case 169:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.dotDotDotToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.initializer);
+            case 156:
+            case 157:
+            case 151:
+            case 152:
+            case 153:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 147:
+            case 146:
+            case 148:
+            case 149:
+            case 150:
+            case 179:
+            case 220:
+            case 180:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.equalsGreaterThanToken) ||
+                    visitNode(cbNode, node.body);
+            case 155:
+                return visitNode(cbNode, node.typeName) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 154:
+                return visitNode(cbNode, node.parameterName) ||
+                    visitNode(cbNode, node.type);
+            case 158:
+                return visitNode(cbNode, node.exprName);
+            case 159:
+                return visitNodes(cbNodes, node.members);
+            case 160:
+                return visitNode(cbNode, node.elementType);
+            case 161:
+                return visitNodes(cbNodes, node.elementTypes);
+            case 162:
+            case 163:
+                return visitNodes(cbNodes, node.types);
+            case 164:
+                return visitNode(cbNode, node.type);
+            case 167:
+            case 168:
+                return visitNodes(cbNodes, node.elements);
+            case 170:
+                return visitNodes(cbNodes, node.elements);
+            case 171:
+                return visitNodes(cbNodes, node.properties);
+            case 172:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.dotToken) ||
+                    visitNode(cbNode, node.name);
+            case 173:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.argumentExpression);
+            case 174:
+            case 175:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments) ||
+                    visitNodes(cbNodes, node.arguments);
+            case 176:
+                return visitNode(cbNode, node.tag) ||
+                    visitNode(cbNode, node.template);
+            case 177:
+                return visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.expression);
+            case 178:
+                return visitNode(cbNode, node.expression);
+            case 181:
+                return visitNode(cbNode, node.expression);
+            case 182:
+                return visitNode(cbNode, node.expression);
+            case 183:
+                return visitNode(cbNode, node.expression);
+            case 185:
+                return visitNode(cbNode, node.operand);
+            case 190:
+                return visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.expression);
+            case 184:
+                return visitNode(cbNode, node.expression);
+            case 186:
+                return visitNode(cbNode, node.operand);
+            case 187:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.operatorToken) ||
+                    visitNode(cbNode, node.right);
+            case 195:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.type);
+            case 196:
+                return visitNode(cbNode, node.expression);
+            case 188:
+                return visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.whenTrue) ||
+                    visitNode(cbNode, node.colonToken) ||
+                    visitNode(cbNode, node.whenFalse);
+            case 191:
+                return visitNode(cbNode, node.expression);
+            case 199:
+            case 226:
+                return visitNodes(cbNodes, node.statements);
+            case 256:
+                return visitNodes(cbNodes, node.statements) ||
+                    visitNode(cbNode, node.endOfFileToken);
+            case 200:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.declarationList);
+            case 219:
+                return visitNodes(cbNodes, node.declarations);
+            case 202:
+                return visitNode(cbNode, node.expression);
+            case 203:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.thenStatement) ||
+                    visitNode(cbNode, node.elseStatement);
+            case 204:
+                return visitNode(cbNode, node.statement) ||
+                    visitNode(cbNode, node.expression);
+            case 205:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 206:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.incrementor) ||
+                    visitNode(cbNode, node.statement);
+            case 207:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 208:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 209:
+            case 210:
+                return visitNode(cbNode, node.label);
+            case 211:
+                return visitNode(cbNode, node.expression);
+            case 212:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 213:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.caseBlock);
+            case 227:
+                return visitNodes(cbNodes, node.clauses);
+            case 249:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.statements);
+            case 250:
+                return visitNodes(cbNodes, node.statements);
+            case 214:
+                return visitNode(cbNode, node.label) ||
+                    visitNode(cbNode, node.statement);
+            case 215:
+                return visitNode(cbNode, node.expression);
+            case 216:
+                return visitNode(cbNode, node.tryBlock) ||
+                    visitNode(cbNode, node.catchClause) ||
+                    visitNode(cbNode, node.finallyBlock);
+            case 252:
+                return visitNode(cbNode, node.variableDeclaration) ||
+                    visitNode(cbNode, node.block);
+            case 143:
+                return visitNode(cbNode, node.expression);
+            case 221:
+            case 192:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 222:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 223:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNode(cbNode, node.type);
+            case 224:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.members);
+            case 255:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 225:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.body);
+            case 229:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.moduleReference);
+            case 230:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.importClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 231:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.namedBindings);
+            case 228:
+                return visitNode(cbNode, node.name);
+            case 232:
+                return visitNode(cbNode, node.name);
+            case 233:
+            case 237:
+                return visitNodes(cbNodes, node.elements);
+            case 236:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.exportClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 234:
+            case 238:
+                return visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.name);
+            case 235:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.expression);
+            case 189:
+                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
+            case 197:
+                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
+            case 140:
+                return visitNode(cbNode, node.expression);
+            case 251:
+                return visitNodes(cbNodes, node.types);
+            case 194:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 240:
+                return visitNode(cbNode, node.expression);
+            case 239:
+                return visitNodes(cbNodes, node.decorators);
+            case 241:
+                return visitNode(cbNode, node.openingElement) ||
+                    visitNodes(cbNodes, node.children) ||
+                    visitNode(cbNode, node.closingElement);
+            case 242:
+            case 243:
+                return visitNode(cbNode, node.tagName) ||
+                    visitNodes(cbNodes, node.attributes);
+            case 246:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 247:
+                return visitNode(cbNode, node.expression);
+            case 248:
+                return visitNode(cbNode, node.expression);
+            case 245:
+                return visitNode(cbNode, node.tagName);
+            case 257:
+                return visitNode(cbNode, node.type);
+            case 261:
+                return visitNodes(cbNodes, node.types);
+            case 262:
+                return visitNodes(cbNodes, node.types);
+            case 260:
+                return visitNode(cbNode, node.elementType);
+            case 264:
+                return visitNode(cbNode, node.type);
+            case 263:
+                return visitNode(cbNode, node.type);
+            case 265:
+                return visitNodes(cbNodes, node.members);
+            case 267:
+                return visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 268:
+                return visitNode(cbNode, node.type);
+            case 269:
+                return visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 270:
+                return visitNode(cbNode, node.type);
+            case 271:
+                return visitNode(cbNode, node.type);
+            case 272:
+                return visitNode(cbNode, node.type);
+            case 266:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.type);
+            case 273:
+                return visitNodes(cbNodes, node.tags);
+            case 275:
+                return visitNode(cbNode, node.preParameterName) ||
+                    visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.postParameterName);
+            case 276:
+                return visitNode(cbNode, node.typeExpression);
+            case 277:
+                return visitNode(cbNode, node.typeExpression);
+            case 278:
+                return visitNodes(cbNodes, node.typeParameters);
+            case 279:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.jsDocTypeLiteral);
+            case 281:
+                return visitNodes(cbNodes, node.jsDocPropertyTags);
+            case 280:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.name);
+        }
+    }
+    ts.forEachChild = forEachChild;
+    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
+        if (setParentNodes === void 0) { setParentNodes = false; }
+        var start = new Date().getTime();
+        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, undefined, setParentNodes, scriptKind);
+        ts.parseTime += new Date().getTime() - start;
+        return result;
+    }
+    ts.createSourceFile = createSourceFile;
+    function isExternalModule(file) {
+        return file.externalModuleIndicator !== undefined;
+    }
+    ts.isExternalModule = isExternalModule;
+    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+        return IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
+    }
+    ts.updateSourceFile = updateSourceFile;
+    function parseIsolatedJSDocComment(content, start, length) {
+        var result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
+        if (result && result.jsDocComment) {
+            Parser.fixupParentReferences(result.jsDocComment);
+        }
+        return result;
+    }
+    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+    function parseJSDocTypeExpressionForTests(content, start, length) {
+        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
+    }
+    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+    var Parser;
+    (function (Parser) {
+        var scanner = ts.createScanner(2, true);
+        var disallowInAndDecoratorContext = 4194304 | 16777216;
+        var NodeConstructor;
+        var SourceFileConstructor;
+        var sourceFile;
+        var parseDiagnostics;
+        var syntaxCursor;
+        var token;
+        var sourceText;
+        var nodeCount;
+        var identifiers;
+        var identifierCount;
+        var parsingContext;
+        var contextFlags;
+        var parseErrorBeforeNextFinishedNode = false;
+        function parseSourceFile(fileName, _sourceText, languageVersion, _syntaxCursor, setParentNodes, scriptKind) {
+            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
+            initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind);
+            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
+            clearState();
+            return result;
+        }
+        Parser.parseSourceFile = parseSourceFile;
+        function getLanguageVariant(scriptKind) {
+            return scriptKind === 4 || scriptKind === 2 || scriptKind === 1 ? 1 : 0;
+        }
+        function initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind) {
+            NodeConstructor = ts.objectAllocator.getNodeConstructor();
+            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
+            sourceText = _sourceText;
+            syntaxCursor = _syntaxCursor;
+            parseDiagnostics = [];
+            parsingContext = 0;
+            identifiers = {};
+            identifierCount = 0;
+            nodeCount = 0;
+            contextFlags = scriptKind === 1 || scriptKind === 2 ? 134217728 : 0;
+            parseErrorBeforeNextFinishedNode = false;
+            scanner.setText(sourceText);
+            scanner.setOnError(scanError);
+            scanner.setScriptTarget(languageVersion);
+            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
+        }
+        function clearState() {
+            scanner.setText("");
+            scanner.setOnError(undefined);
+            parseDiagnostics = undefined;
+            sourceFile = undefined;
+            identifiers = undefined;
+            syntaxCursor = undefined;
+            sourceText = undefined;
+        }
+        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
+            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
+            sourceFile.flags = contextFlags;
+            token = nextToken();
+            processReferenceComments(sourceFile);
+            sourceFile.statements = parseList(0, parseStatement);
+            ts.Debug.assert(token === 1);
+            sourceFile.endOfFileToken = parseTokenNode();
+            setExternalModuleIndicator(sourceFile);
+            sourceFile.nodeCount = nodeCount;
+            sourceFile.identifierCount = identifierCount;
+            sourceFile.identifiers = identifiers;
+            sourceFile.parseDiagnostics = parseDiagnostics;
+            if (setParentNodes) {
+                fixupParentReferences(sourceFile);
+            }
+            return sourceFile;
+        }
+        function addJSDocComment(node) {
+            if (contextFlags & 134217728) {
+                var comments = ts.getLeadingCommentRangesOfNode(node, sourceFile);
+                if (comments) {
+                    for (var _i = 0, comments_1 = comments; _i < comments_1.length; _i++) {
+                        var comment = comments_1[_i];
+                        var jsDocComment = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
+                        if (!jsDocComment) {
+                            continue;
+                        }
+                        if (!node.jsDocComments) {
+                            node.jsDocComments = [];
+                        }
+                        node.jsDocComments.push(jsDocComment);
+                    }
+                }
+            }
+            return node;
+        }
+        function fixupParentReferences(rootNode) {
+            var parent = rootNode;
+            forEachChild(rootNode, visitNode);
+            return;
+            function visitNode(n) {
+                if (n.parent !== parent) {
+                    n.parent = parent;
+                    var saveParent = parent;
+                    parent = n;
+                    forEachChild(n, visitNode);
+                    if (n.jsDocComments) {
+                        for (var _i = 0, _a = n.jsDocComments; _i < _a.length; _i++) {
+                            var jsDocComment = _a[_i];
+                            jsDocComment.parent = n;
+                            parent = jsDocComment;
+                            forEachChild(jsDocComment, visitNode);
+                        }
+                    }
+                    parent = saveParent;
+                }
+            }
+        }
+        Parser.fixupParentReferences = fixupParentReferences;
+        function createSourceFile(fileName, languageVersion, scriptKind) {
+            var sourceFile = new SourceFileConstructor(256, 0, sourceText.length);
+            nodeCount++;
+            sourceFile.text = sourceText;
+            sourceFile.bindDiagnostics = [];
+            sourceFile.languageVersion = languageVersion;
+            sourceFile.fileName = ts.normalizePath(fileName);
+            sourceFile.languageVariant = getLanguageVariant(scriptKind);
+            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts");
+            sourceFile.scriptKind = scriptKind;
+            return sourceFile;
+        }
+        function setContextFlag(val, flag) {
+            if (val) {
+                contextFlags |= flag;
+            }
+            else {
+                contextFlags &= ~flag;
+            }
+        }
+        function setDisallowInContext(val) {
+            setContextFlag(val, 4194304);
+        }
+        function setYieldContext(val) {
+            setContextFlag(val, 8388608);
+        }
+        function setDecoratorContext(val) {
+            setContextFlag(val, 16777216);
+        }
+        function setAwaitContext(val) {
+            setContextFlag(val, 33554432);
+        }
+        function doOutsideOfContext(context, func) {
+            var contextFlagsToClear = context & contextFlags;
+            if (contextFlagsToClear) {
+                setContextFlag(false, contextFlagsToClear);
+                var result = func();
+                setContextFlag(true, contextFlagsToClear);
+                return result;
+            }
+            return func();
+        }
+        function doInsideOfContext(context, func) {
+            var contextFlagsToSet = context & ~contextFlags;
+            if (contextFlagsToSet) {
+                setContextFlag(true, contextFlagsToSet);
+                var result = func();
+                setContextFlag(false, contextFlagsToSet);
+                return result;
+            }
+            return func();
+        }
+        function allowInAnd(func) {
+            return doOutsideOfContext(4194304, func);
+        }
+        function disallowInAnd(func) {
+            return doInsideOfContext(4194304, func);
+        }
+        function doInYieldContext(func) {
+            return doInsideOfContext(8388608, func);
+        }
+        function doInDecoratorContext(func) {
+            return doInsideOfContext(16777216, func);
+        }
+        function doInAwaitContext(func) {
+            return doInsideOfContext(33554432, func);
+        }
+        function doOutsideOfAwaitContext(func) {
+            return doOutsideOfContext(33554432, func);
+        }
+        function doInYieldAndAwaitContext(func) {
+            return doInsideOfContext(8388608 | 33554432, func);
+        }
+        function inContext(flags) {
+            return (contextFlags & flags) !== 0;
+        }
+        function inYieldContext() {
+            return inContext(8388608);
+        }
+        function inDisallowInContext() {
+            return inContext(4194304);
+        }
+        function inDecoratorContext() {
+            return inContext(16777216);
+        }
+        function inAwaitContext() {
+            return inContext(33554432);
+        }
+        function parseErrorAtCurrentToken(message, arg0) {
+            var start = scanner.getTokenPos();
+            var length = scanner.getTextPos() - start;
+            parseErrorAtPosition(start, length, message, arg0);
+        }
+        function parseErrorAtPosition(start, length, message, arg0) {
+            var lastError = ts.lastOrUndefined(parseDiagnostics);
+            if (!lastError || start !== lastError.start) {
+                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
+            }
+            parseErrorBeforeNextFinishedNode = true;
+        }
+        function scanError(message, length) {
+            var pos = scanner.getTextPos();
+            parseErrorAtPosition(pos, length || 0, message);
+        }
+        function getNodePos() {
+            return scanner.getStartPos();
+        }
+        function getNodeEnd() {
+            return scanner.getStartPos();
+        }
+        function nextToken() {
+            return token = scanner.scan();
+        }
+        function reScanGreaterToken() {
+            return token = scanner.reScanGreaterToken();
+        }
+        function reScanSlashToken() {
+            return token = scanner.reScanSlashToken();
+        }
+        function reScanTemplateToken() {
+            return token = scanner.reScanTemplateToken();
+        }
+        function scanJsxIdentifier() {
+            return token = scanner.scanJsxIdentifier();
+        }
+        function scanJsxText() {
+            return token = scanner.scanJsxToken();
+        }
+        function speculationHelper(callback, isLookAhead) {
+            var saveToken = token;
+            var saveParseDiagnosticsLength = parseDiagnostics.length;
+            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+            var saveContextFlags = contextFlags;
+            var result = isLookAhead
+                ? scanner.lookAhead(callback)
+                : scanner.tryScan(callback);
+            ts.Debug.assert(saveContextFlags === contextFlags);
+            if (!result || isLookAhead) {
+                token = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+            }
+            return result;
+        }
+        function lookAhead(callback) {
+            return speculationHelper(callback, true);
+        }
+        function tryParse(callback) {
+            return speculationHelper(callback, false);
+        }
+        function isIdentifier() {
+            if (token === 69) {
+                return true;
+            }
+            if (token === 114 && inYieldContext()) {
+                return false;
+            }
+            if (token === 119 && inAwaitContext()) {
+                return false;
+            }
+            return token > 105;
+        }
+        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
+            if (shouldAdvance === void 0) { shouldAdvance = true; }
+            if (token === kind) {
+                if (shouldAdvance) {
+                    nextToken();
+                }
+                return true;
+            }
+            if (diagnosticMessage) {
+                parseErrorAtCurrentToken(diagnosticMessage);
+            }
+            else {
+                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
+            }
+            return false;
+        }
+        function parseOptional(t) {
+            if (token === t) {
+                nextToken();
+                return true;
+            }
+            return false;
+        }
+        function parseOptionalToken(t) {
+            if (token === t) {
+                return parseTokenNode();
+            }
+            return undefined;
+        }
+        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            return parseOptionalToken(t) ||
+                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
+        }
+        function parseTokenNode() {
+            var node = createNode(token);
+            nextToken();
+            return finishNode(node);
+        }
+        function canParseSemicolon() {
+            if (token === 23) {
+                return true;
+            }
+            return token === 16 || token === 1 || scanner.hasPrecedingLineBreak();
+        }
+        function parseSemicolon() {
+            if (canParseSemicolon()) {
+                if (token === 23) {
+                    nextToken();
+                }
+                return true;
+            }
+            else {
+                return parseExpected(23);
+            }
+        }
+        function createNode(kind, pos) {
+            nodeCount++;
+            if (!(pos >= 0)) {
+                pos = scanner.getStartPos();
+            }
+            return new NodeConstructor(kind, pos, pos);
+        }
+        function finishNode(node, end) {
+            node.end = end === undefined ? scanner.getStartPos() : end;
+            if (contextFlags) {
+                node.flags |= contextFlags;
+            }
+            if (parseErrorBeforeNextFinishedNode) {
+                parseErrorBeforeNextFinishedNode = false;
+                node.flags |= 67108864;
+            }
+            return node;
+        }
+        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            if (reportAtCurrentPosition) {
+                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
+            }
+            else {
+                parseErrorAtCurrentToken(diagnosticMessage, arg0);
+            }
+            var result = createNode(kind, scanner.getStartPos());
+            result.text = "";
+            return finishNode(result);
+        }
+        function internIdentifier(text) {
+            text = ts.escapeIdentifier(text);
+            return ts.hasProperty(identifiers, text) ? identifiers[text] : (identifiers[text] = text);
+        }
+        function createIdentifier(isIdentifier, diagnosticMessage) {
+            identifierCount++;
+            if (isIdentifier) {
+                var node = createNode(69);
+                if (token !== 69) {
+                    node.originalKeywordKind = token;
+                }
+                node.text = internIdentifier(scanner.getTokenValue());
+                nextToken();
+                return finishNode(node);
+            }
+            return createMissingNode(69, false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
+        }
+        function parseIdentifier(diagnosticMessage) {
+            return createIdentifier(isIdentifier(), diagnosticMessage);
+        }
+        function parseIdentifierName() {
+            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token));
+        }
+        function isLiteralPropertyName() {
+            return ts.tokenIsIdentifierOrKeyword(token) ||
+                token === 9 ||
+                token === 8;
+        }
+        function parsePropertyNameWorker(allowComputedPropertyNames) {
+            if (token === 9 || token === 8) {
+                return parseLiteralNode(true);
+            }
+            if (allowComputedPropertyNames && token === 19) {
+                return parseComputedPropertyName();
+            }
+            return parseIdentifierName();
+        }
+        function parsePropertyName() {
+            return parsePropertyNameWorker(true);
+        }
+        function parseSimplePropertyName() {
+            return parsePropertyNameWorker(false);
+        }
+        function isSimplePropertyName() {
+            return token === 9 || token === 8 || ts.tokenIsIdentifierOrKeyword(token);
+        }
+        function parseComputedPropertyName() {
+            var node = createNode(140);
+            parseExpected(19);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20);
+            return finishNode(node);
+        }
+        function parseContextualModifier(t) {
+            return token === t && tryParse(nextTokenCanFollowModifier);
+        }
+        function nextTokenIsOnSameLineAndCanFollowModifier() {
+            nextToken();
+            if (scanner.hasPrecedingLineBreak()) {
+                return false;
+            }
+            return canFollowModifier();
+        }
+        function nextTokenCanFollowModifier() {
+            if (token === 74) {
+                return nextToken() === 81;
+            }
+            if (token === 82) {
+                nextToken();
+                if (token === 77) {
+                    return lookAhead(nextTokenIsClassOrFunction);
+                }
+                return token !== 37 && token !== 116 && token !== 15 && canFollowModifier();
+            }
+            if (token === 77) {
+                return nextTokenIsClassOrFunction();
+            }
+            if (token === 113) {
+                nextToken();
+                return canFollowModifier();
+            }
+            return nextTokenIsOnSameLineAndCanFollowModifier();
+        }
+        function parseAnyContextualModifier() {
+            return ts.isModifierKind(token) && tryParse(nextTokenCanFollowModifier);
+        }
+        function canFollowModifier() {
+            return token === 19
+                || token === 15
+                || token === 37
+                || isLiteralPropertyName();
+        }
+        function nextTokenIsClassOrFunction() {
+            nextToken();
+            return token === 73 || token === 87;
+        }
+        function isListElement(parsingContext, inErrorRecovery) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return true;
+            }
+            switch (parsingContext) {
+                case 0:
+                case 1:
+                case 3:
+                    return !(token === 23 && inErrorRecovery) && isStartOfStatement();
+                case 2:
+                    return token === 71 || token === 77;
+                case 4:
+                    return lookAhead(isTypeMemberStart);
+                case 5:
+                    return lookAhead(isClassMemberStart) || (token === 23 && !inErrorRecovery);
+                case 6:
+                    return token === 19 || isLiteralPropertyName();
+                case 12:
+                    return token === 19 || token === 37 || isLiteralPropertyName();
+                case 9:
+                    return token === 19 || isLiteralPropertyName();
+                case 7:
+                    if (token === 15) {
+                        return lookAhead(isValidHeritageClauseObjectLiteral);
+                    }
+                    if (!inErrorRecovery) {
+                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    }
+                    else {
+                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    }
+                case 8:
+                    return isIdentifierOrPattern();
+                case 10:
+                    return token === 24 || token === 22 || isIdentifierOrPattern();
+                case 17:
+                    return isIdentifier();
+                case 11:
+                case 15:
+                    return token === 24 || token === 22 || isStartOfExpression();
+                case 16:
+                    return isStartOfParameter();
+                case 18:
+                case 19:
+                    return token === 24 || isStartOfType();
+                case 20:
+                    return isHeritageClause();
+                case 21:
+                    return ts.tokenIsIdentifierOrKeyword(token);
+                case 13:
+                    return ts.tokenIsIdentifierOrKeyword(token) || token === 15;
+                case 14:
+                    return true;
+                case 22:
+                case 23:
+                case 25:
+                    return JSDocParser.isJSDocType();
+                case 24:
+                    return isSimplePropertyName();
+            }
+            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
+        }
+        function isValidHeritageClauseObjectLiteral() {
+            ts.Debug.assert(token === 15);
+            if (nextToken() === 16) {
+                var next = nextToken();
+                return next === 24 || next === 15 || next === 83 || next === 106;
+            }
+            return true;
+        }
+        function nextTokenIsIdentifier() {
+            nextToken();
+            return isIdentifier();
+        }
+        function nextTokenIsIdentifierOrKeyword() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token);
+        }
+        function isHeritageClauseExtendsOrImplementsKeyword() {
+            if (token === 106 ||
+                token === 83) {
+                return lookAhead(nextTokenIsStartOfExpression);
+            }
+            return false;
+        }
+        function nextTokenIsStartOfExpression() {
+            nextToken();
+            return isStartOfExpression();
+        }
+        function isListTerminator(kind) {
+            if (token === 1) {
+                return true;
+            }
+            switch (kind) {
+                case 1:
+                case 2:
+                case 4:
+                case 5:
+                case 6:
+                case 12:
+                case 9:
+                case 21:
+                    return token === 16;
+                case 3:
+                    return token === 16 || token === 71 || token === 77;
+                case 7:
+                    return token === 15 || token === 83 || token === 106;
+                case 8:
+                    return isVariableDeclaratorListTerminator();
+                case 17:
+                    return token === 27 || token === 17 || token === 15 || token === 83 || token === 106;
+                case 11:
+                    return token === 18 || token === 23;
+                case 15:
+                case 19:
+                case 10:
+                    return token === 20;
+                case 16:
+                    return token === 18 || token === 20;
+                case 18:
+                    return token === 27 || token === 17;
+                case 20:
+                    return token === 15 || token === 16;
+                case 13:
+                    return token === 27 || token === 39;
+                case 14:
+                    return token === 25 && lookAhead(nextTokenIsSlash);
+                case 22:
+                    return token === 18 || token === 54 || token === 16;
+                case 23:
+                    return token === 27 || token === 16;
+                case 25:
+                    return token === 20 || token === 16;
+                case 24:
+                    return token === 16;
+            }
+        }
+        function isVariableDeclaratorListTerminator() {
+            if (canParseSemicolon()) {
+                return true;
+            }
+            if (isInOrOfKeyword(token)) {
+                return true;
+            }
+            if (token === 34) {
+                return true;
+            }
+            return false;
+        }
+        function isInSomeParsingContext() {
+            for (var kind = 0; kind < 26; kind++) {
+                if (parsingContext & (1 << kind)) {
+                    if (isListElement(kind, true) || isListTerminator(kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function parseList(kind, parseElement) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = [];
+            result.pos = getNodePos();
+            while (!isListTerminator(kind)) {
+                if (isListElement(kind, false)) {
+                    var element = parseListElement(kind, parseElement);
+                    result.push(element);
+                    continue;
+                }
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
+                }
+            }
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function parseListElement(parsingContext, parseElement) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return consumeNode(node);
+            }
+            return parseElement();
+        }
+        function currentNode(parsingContext) {
+            if (parseErrorBeforeNextFinishedNode) {
+                return undefined;
+            }
+            if (!syntaxCursor) {
+                return undefined;
+            }
+            var node = syntaxCursor.currentNode(scanner.getStartPos());
+            if (ts.nodeIsMissing(node)) {
+                return undefined;
+            }
+            if (node.intersectsChange) {
+                return undefined;
+            }
+            if (ts.containsParseError(node)) {
+                return undefined;
+            }
+            var nodeContextFlags = node.flags & 197132288;
+            if (nodeContextFlags !== contextFlags) {
+                return undefined;
+            }
+            if (!canReuseNode(node, parsingContext)) {
+                return undefined;
+            }
+            return node;
+        }
+        function consumeNode(node) {
+            scanner.setTextPos(node.end);
+            nextToken();
+            return node;
+        }
+        function canReuseNode(node, parsingContext) {
+            switch (parsingContext) {
+                case 5:
+                    return isReusableClassMember(node);
+                case 2:
+                    return isReusableSwitchClause(node);
+                case 0:
+                case 1:
+                case 3:
+                    return isReusableStatement(node);
+                case 6:
+                    return isReusableEnumMember(node);
+                case 4:
+                    return isReusableTypeMember(node);
+                case 8:
+                    return isReusableVariableDeclaration(node);
+                case 16:
+                    return isReusableParameter(node);
+                case 20:
+                case 17:
+                case 19:
+                case 18:
+                case 11:
+                case 12:
+                case 7:
+                case 13:
+                case 14:
+            }
+            return false;
+        }
+        function isReusableClassMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 148:
+                    case 153:
+                    case 149:
+                    case 150:
+                    case 145:
+                    case 198:
+                        return true;
+                    case 147:
+                        var methodDeclaration = node;
+                        var nameIsConstructor = methodDeclaration.name.kind === 69 &&
+                            methodDeclaration.name.originalKeywordKind === 121;
+                        return !nameIsConstructor;
+                }
+            }
+            return false;
+        }
+        function isReusableSwitchClause(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 249:
+                    case 250:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableStatement(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 220:
+                    case 200:
+                    case 199:
+                    case 203:
+                    case 202:
+                    case 215:
+                    case 211:
+                    case 213:
+                    case 210:
+                    case 209:
+                    case 207:
+                    case 208:
+                    case 206:
+                    case 205:
+                    case 212:
+                    case 201:
+                    case 216:
+                    case 214:
+                    case 204:
+                    case 217:
+                    case 230:
+                    case 229:
+                    case 236:
+                    case 235:
+                    case 225:
+                    case 221:
+                    case 222:
+                    case 224:
+                    case 223:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableEnumMember(node) {
+            return node.kind === 255;
+        }
+        function isReusableTypeMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 152:
+                    case 146:
+                    case 153:
+                    case 144:
+                    case 151:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableVariableDeclaration(node) {
+            if (node.kind !== 218) {
+                return false;
+            }
+            var variableDeclarator = node;
+            return variableDeclarator.initializer === undefined;
+        }
+        function isReusableParameter(node) {
+            if (node.kind !== 142) {
+                return false;
+            }
+            var parameter = node;
+            return parameter.initializer === undefined;
+        }
+        function abortParsingListOrMoveToNextToken(kind) {
+            parseErrorAtCurrentToken(parsingContextErrors(kind));
+            if (isInSomeParsingContext()) {
+                return true;
+            }
+            nextToken();
+            return false;
+        }
+        function parsingContextErrors(context) {
+            switch (context) {
+                case 0: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 1: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 2: return ts.Diagnostics.case_or_default_expected;
+                case 3: return ts.Diagnostics.Statement_expected;
+                case 4: return ts.Diagnostics.Property_or_signature_expected;
+                case 5: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
+                case 6: return ts.Diagnostics.Enum_member_expected;
+                case 7: return ts.Diagnostics.Expression_expected;
+                case 8: return ts.Diagnostics.Variable_declaration_expected;
+                case 9: return ts.Diagnostics.Property_destructuring_pattern_expected;
+                case 10: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
+                case 11: return ts.Diagnostics.Argument_expression_expected;
+                case 12: return ts.Diagnostics.Property_assignment_expected;
+                case 15: return ts.Diagnostics.Expression_or_comma_expected;
+                case 16: return ts.Diagnostics.Parameter_declaration_expected;
+                case 17: return ts.Diagnostics.Type_parameter_declaration_expected;
+                case 18: return ts.Diagnostics.Type_argument_expected;
+                case 19: return ts.Diagnostics.Type_expected;
+                case 20: return ts.Diagnostics.Unexpected_token_expected;
+                case 21: return ts.Diagnostics.Identifier_expected;
+                case 13: return ts.Diagnostics.Identifier_expected;
+                case 14: return ts.Diagnostics.Identifier_expected;
+                case 22: return ts.Diagnostics.Parameter_declaration_expected;
+                case 23: return ts.Diagnostics.Type_argument_expected;
+                case 25: return ts.Diagnostics.Type_expected;
+                case 24: return ts.Diagnostics.Property_assignment_expected;
+            }
+        }
+        ;
+        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = [];
+            result.pos = getNodePos();
+            var commaStart = -1;
+            while (true) {
+                if (isListElement(kind, false)) {
+                    result.push(parseListElement(kind, parseElement));
+                    commaStart = scanner.getTokenPos();
+                    if (parseOptional(24)) {
+                        continue;
+                    }
+                    commaStart = -1;
+                    if (isListTerminator(kind)) {
+                        break;
+                    }
+                    parseExpected(24);
+                    if (considerSemicolonAsDelimiter && token === 23 && !scanner.hasPrecedingLineBreak()) {
+                        nextToken();
+                    }
+                    continue;
+                }
+                if (isListTerminator(kind)) {
+                    break;
+                }
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
+                }
+            }
+            if (commaStart >= 0) {
+                result.hasTrailingComma = true;
+            }
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function createMissingList() {
+            var pos = getNodePos();
+            var result = [];
+            result.pos = pos;
+            result.end = pos;
+            return result;
+        }
+        function parseBracketedList(kind, parseElement, open, close) {
+            if (parseExpected(open)) {
+                var result = parseDelimitedList(kind, parseElement);
+                parseExpected(close);
+                return result;
+            }
+            return createMissingList();
+        }
+        function parseEntityName(allowReservedWords, diagnosticMessage) {
+            var entity = parseIdentifier(diagnosticMessage);
+            while (parseOptional(21)) {
+                var node = createNode(139, entity.pos);
+                node.left = entity;
+                node.right = parseRightSideOfDot(allowReservedWords);
+                entity = finishNode(node);
+            }
+            return entity;
+        }
+        function parseRightSideOfDot(allowIdentifierNames) {
+            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token)) {
+                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                if (matchesPattern) {
+                    return createMissingNode(69, true, ts.Diagnostics.Identifier_expected);
+                }
+            }
+            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
+        }
+        function parseTemplateExpression() {
+            var template = createNode(189);
+            template.head = parseTemplateLiteralFragment();
+            ts.Debug.assert(template.head.kind === 12, "Template head has wrong token kind");
+            var templateSpans = [];
+            templateSpans.pos = getNodePos();
+            do {
+                templateSpans.push(parseTemplateSpan());
+            } while (ts.lastOrUndefined(templateSpans).literal.kind === 13);
+            templateSpans.end = getNodeEnd();
+            template.templateSpans = templateSpans;
+            return finishNode(template);
+        }
+        function parseTemplateSpan() {
+            var span = createNode(197);
+            span.expression = allowInAnd(parseExpression);
+            var literal;
+            if (token === 16) {
+                reScanTemplateToken();
+                literal = parseTemplateLiteralFragment();
+            }
+            else {
+                literal = parseExpectedToken(14, false, ts.Diagnostics._0_expected, ts.tokenToString(16));
+            }
+            span.literal = literal;
+            return finishNode(span);
+        }
+        function parseStringLiteralTypeNode() {
+            return parseLiteralLikeNode(166, true);
+        }
+        function parseLiteralNode(internName) {
+            return parseLiteralLikeNode(token, internName);
+        }
+        function parseTemplateLiteralFragment() {
+            return parseLiteralLikeNode(token, false);
+        }
+        function parseLiteralLikeNode(kind, internName) {
+            var node = createNode(kind);
+            var text = scanner.getTokenValue();
+            node.text = internName ? internIdentifier(text) : text;
+            if (scanner.hasExtendedUnicodeEscape()) {
+                node.hasExtendedUnicodeEscape = true;
+            }
+            if (scanner.isUnterminated()) {
+                node.isUnterminated = true;
+            }
+            var tokenPos = scanner.getTokenPos();
+            nextToken();
+            finishNode(node);
+            if (node.kind === 8
+                && sourceText.charCodeAt(tokenPos) === 48
+                && ts.isOctalDigit(sourceText.charCodeAt(tokenPos + 1))) {
+                node.isOctalLiteral = true;
+            }
+            return node;
+        }
+        function parseTypeReference() {
+            var typeName = parseEntityName(false, ts.Diagnostics.Type_expected);
+            var node = createNode(155, typeName.pos);
+            node.typeName = typeName;
+            if (!scanner.hasPrecedingLineBreak() && token === 25) {
+                node.typeArguments = parseBracketedList(18, parseType, 25, 27);
+            }
+            return finishNode(node);
+        }
+        function parseThisTypePredicate(lhs) {
+            nextToken();
+            var node = createNode(154, lhs.pos);
+            node.parameterName = lhs;
+            node.type = parseType();
+            return finishNode(node);
+        }
+        function parseThisTypeNode() {
+            var node = createNode(165);
+            nextToken();
+            return finishNode(node);
+        }
+        function parseTypeQuery() {
+            var node = createNode(158);
+            parseExpected(101);
+            node.exprName = parseEntityName(true);
+            return finishNode(node);
+        }
+        function parseTypeParameter() {
+            var node = createNode(141);
+            node.name = parseIdentifier();
+            if (parseOptional(83)) {
+                if (isStartOfType() || !isStartOfExpression()) {
+                    node.constraint = parseType();
+                }
+                else {
+                    node.expression = parseUnaryExpressionOrHigher();
+                }
+            }
+            return finishNode(node);
+        }
+        function parseTypeParameters() {
+            if (token === 25) {
+                return parseBracketedList(17, parseTypeParameter, 25, 27);
+            }
+        }
+        function parseParameterType() {
+            if (parseOptional(54)) {
+                return parseType();
+            }
+            return undefined;
+        }
+        function isStartOfParameter() {
+            return token === 22 || isIdentifierOrPattern() || ts.isModifierKind(token) || token === 55 || token === 97;
+        }
+        function setModifiers(node, modifiers) {
+            if (modifiers) {
+                node.flags |= modifiers.flags;
+                node.modifiers = modifiers;
+            }
+        }
+        function parseParameter() {
+            var node = createNode(142);
+            if (token === 97) {
+                node.name = createIdentifier(true, undefined);
+                node.type = parseParameterType();
+                return finishNode(node);
+            }
+            node.decorators = parseDecorators();
+            setModifiers(node, parseModifiers());
+            node.dotDotDotToken = parseOptionalToken(22);
+            node.name = parseIdentifierOrPattern();
+            if (ts.getFullWidth(node.name) === 0 && node.flags === 0 && ts.isModifierKind(token)) {
+                nextToken();
+            }
+            node.questionToken = parseOptionalToken(53);
+            node.type = parseParameterType();
+            node.initializer = parseBindingElementInitializer(true);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseBindingElementInitializer(inParameter) {
+            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
+        }
+        function parseParameterInitializer() {
+            return parseInitializer(true);
+        }
+        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
+            var returnTokenRequired = returnToken === 34;
+            signature.typeParameters = parseTypeParameters();
+            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
+            if (returnTokenRequired) {
+                parseExpected(returnToken);
+                signature.type = parseTypeOrTypePredicate();
+            }
+            else if (parseOptional(returnToken)) {
+                signature.type = parseTypeOrTypePredicate();
+            }
+        }
+        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
+            if (parseExpected(17)) {
+                var savedYieldContext = inYieldContext();
+                var savedAwaitContext = inAwaitContext();
+                setYieldContext(yieldContext);
+                setAwaitContext(awaitContext);
+                var result = parseDelimitedList(16, parseParameter);
+                setYieldContext(savedYieldContext);
+                setAwaitContext(savedAwaitContext);
+                if (!parseExpected(18) && requireCompleteParameterList) {
+                    return undefined;
+                }
+                return result;
+            }
+            return requireCompleteParameterList ? undefined : createMissingList();
+        }
+        function parseTypeMemberSemicolon() {
+            if (parseOptional(24)) {
+                return;
+            }
+            parseSemicolon();
+        }
+        function parseSignatureMember(kind) {
+            var node = createNode(kind);
+            if (kind === 152) {
+                parseExpected(92);
+            }
+            fillSignature(54, false, false, false, node);
+            parseTypeMemberSemicolon();
+            return finishNode(node);
+        }
+        function isIndexSignature() {
+            if (token !== 19) {
+                return false;
+            }
+            return lookAhead(isUnambiguouslyIndexSignature);
+        }
+        function isUnambiguouslyIndexSignature() {
+            nextToken();
+            if (token === 22 || token === 20) {
+                return true;
+            }
+            if (ts.isModifierKind(token)) {
+                nextToken();
+                if (isIdentifier()) {
+                    return true;
+                }
+            }
+            else if (!isIdentifier()) {
+                return false;
+            }
+            else {
+                nextToken();
+            }
+            if (token === 54 || token === 24) {
+                return true;
+            }
+            if (token !== 53) {
+                return false;
+            }
+            nextToken();
+            return token === 54 || token === 24 || token === 20;
+        }
+        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(153, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.parameters = parseBracketedList(16, parseParameter, 19, 20);
+            node.type = parseTypeAnnotation();
+            parseTypeMemberSemicolon();
+            return finishNode(node);
+        }
+        function parsePropertyOrMethodSignature(fullStart, modifiers) {
+            var name = parsePropertyName();
+            var questionToken = parseOptionalToken(53);
+            if (token === 17 || token === 25) {
+                var method = createNode(146, fullStart);
+                setModifiers(method, modifiers);
+                method.name = name;
+                method.questionToken = questionToken;
+                fillSignature(54, false, false, false, method);
+                parseTypeMemberSemicolon();
+                return finishNode(method);
+            }
+            else {
+                var property = createNode(144, fullStart);
+                setModifiers(property, modifiers);
+                property.name = name;
+                property.questionToken = questionToken;
+                property.type = parseTypeAnnotation();
+                if (token === 56) {
+                    property.initializer = parseNonParameterInitializer();
+                }
+                parseTypeMemberSemicolon();
+                return finishNode(property);
+            }
+        }
+        function isTypeMemberStart() {
+            var idToken;
+            if (token === 17 || token === 25) {
+                return true;
+            }
+            while (ts.isModifierKind(token)) {
+                idToken = token;
+                nextToken();
+            }
+            if (token === 19) {
+                return true;
+            }
+            if (isLiteralPropertyName()) {
+                idToken = token;
+                nextToken();
+            }
+            if (idToken) {
+                return token === 17 ||
+                    token === 25 ||
+                    token === 53 ||
+                    token === 54 ||
+                    canParseSemicolon();
+            }
+            return false;
+        }
+        function parseTypeMember() {
+            if (token === 17 || token === 25) {
+                return parseSignatureMember(151);
+            }
+            if (token === 92 && lookAhead(isStartOfConstructSignature)) {
+                return parseSignatureMember(152);
+            }
+            var fullStart = getNodePos();
+            var modifiers = parseModifiers();
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, undefined, modifiers);
+            }
+            return parsePropertyOrMethodSignature(fullStart, modifiers);
+        }
+        function isStartOfConstructSignature() {
+            nextToken();
+            return token === 17 || token === 25;
+        }
+        function parseTypeLiteral() {
+            var node = createNode(159);
+            node.members = parseObjectTypeMembers();
+            return finishNode(node);
+        }
+        function parseObjectTypeMembers() {
+            var members;
+            if (parseExpected(15)) {
+                members = parseList(4, parseTypeMember);
+                parseExpected(16);
+            }
+            else {
+                members = createMissingList();
+            }
+            return members;
+        }
+        function parseTupleType() {
+            var node = createNode(161);
+            node.elementTypes = parseBracketedList(19, parseType, 19, 20);
+            return finishNode(node);
+        }
+        function parseParenthesizedType() {
+            var node = createNode(164);
+            parseExpected(17);
+            node.type = parseType();
+            parseExpected(18);
+            return finishNode(node);
+        }
+        function parseFunctionOrConstructorType(kind) {
+            var node = createNode(kind);
+            if (kind === 157) {
+                parseExpected(92);
+            }
+            fillSignature(34, false, false, false, node);
+            return finishNode(node);
+        }
+        function parseKeywordAndNoDot() {
+            var node = parseTokenNode();
+            return token === 21 ? undefined : node;
+        }
+        function parseNonArrayType() {
+            switch (token) {
+                case 117:
+                case 132:
+                case 130:
+                case 120:
+                case 133:
+                case 135:
+                case 127:
+                    var node = tryParse(parseKeywordAndNoDot);
+                    return node || parseTypeReference();
+                case 9:
+                    return parseStringLiteralTypeNode();
+                case 103:
+                case 93:
+                    return parseTokenNode();
+                case 97: {
+                    var thisKeyword = parseThisTypeNode();
+                    if (token === 124 && !scanner.hasPrecedingLineBreak()) {
+                        return parseThisTypePredicate(thisKeyword);
+                    }
+                    else {
+                        return thisKeyword;
+                    }
+                }
+                case 101:
+                    return parseTypeQuery();
+                case 15:
+                    return parseTypeLiteral();
+                case 19:
+                    return parseTupleType();
+                case 17:
+                    return parseParenthesizedType();
+                default:
+                    return parseTypeReference();
+            }
+        }
+        function isStartOfType() {
+            switch (token) {
+                case 117:
+                case 132:
+                case 130:
+                case 120:
+                case 133:
+                case 103:
+                case 135:
+                case 93:
+                case 97:
+                case 101:
+                case 127:
+                case 15:
+                case 19:
+                case 25:
+                case 92:
+                case 9:
+                    return true;
+                case 17:
+                    return lookAhead(isStartOfParenthesizedOrFunctionType);
+                default:
+                    return isIdentifier();
+            }
+        }
+        function isStartOfParenthesizedOrFunctionType() {
+            nextToken();
+            return token === 18 || isStartOfParameter() || isStartOfType();
+        }
+        function parseArrayTypeOrHigher() {
+            var type = parseNonArrayType();
+            while (!scanner.hasPrecedingLineBreak() && parseOptional(19)) {
+                parseExpected(20);
+                var node = createNode(160, type.pos);
+                node.elementType = type;
+                type = finishNode(node);
+            }
+            return type;
+        }
+        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
+            var type = parseConstituentType();
+            if (token === operator) {
+                var types = [type];
+                types.pos = type.pos;
+                while (parseOptional(operator)) {
+                    types.push(parseConstituentType());
+                }
+                types.end = getNodeEnd();
+                var node = createNode(kind, type.pos);
+                node.types = types;
+                type = finishNode(node);
+            }
+            return type;
+        }
+        function parseIntersectionTypeOrHigher() {
+            return parseUnionOrIntersectionType(163, parseArrayTypeOrHigher, 46);
+        }
+        function parseUnionTypeOrHigher() {
+            return parseUnionOrIntersectionType(162, parseIntersectionTypeOrHigher, 47);
+        }
+        function isStartOfFunctionType() {
+            if (token === 25) {
+                return true;
+            }
+            return token === 17 && lookAhead(isUnambiguouslyStartOfFunctionType);
+        }
+        function skipParameterStart() {
+            if (ts.isModifierKind(token)) {
+                parseModifiers();
+            }
+            if (isIdentifier() || token === 97) {
+                nextToken();
+                return true;
+            }
+            if (token === 19 || token === 15) {
+                var previousErrorCount = parseDiagnostics.length;
+                parseIdentifierOrPattern();
+                return previousErrorCount === parseDiagnostics.length;
+            }
+            return false;
+        }
+        function isUnambiguouslyStartOfFunctionType() {
+            nextToken();
+            if (token === 18 || token === 22) {
+                return true;
+            }
+            if (skipParameterStart()) {
+                if (token === 54 || token === 24 ||
+                    token === 53 || token === 56) {
+                    return true;
+                }
+                if (token === 18) {
+                    nextToken();
+                    if (token === 34) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function parseTypeOrTypePredicate() {
+            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
+            var type = parseType();
+            if (typePredicateVariable) {
+                var node = createNode(154, typePredicateVariable.pos);
+                node.parameterName = typePredicateVariable;
+                node.type = type;
+                return finishNode(node);
+            }
+            else {
+                return type;
+            }
+        }
+        function parseTypePredicatePrefix() {
+            var id = parseIdentifier();
+            if (token === 124 && !scanner.hasPrecedingLineBreak()) {
+                nextToken();
+                return id;
+            }
+        }
+        function parseType() {
+            return doOutsideOfContext(41943040, parseTypeWorker);
+        }
+        function parseTypeWorker() {
+            if (isStartOfFunctionType()) {
+                return parseFunctionOrConstructorType(156);
+            }
+            if (token === 92) {
+                return parseFunctionOrConstructorType(157);
+            }
+            return parseUnionTypeOrHigher();
+        }
+        function parseTypeAnnotation() {
+            return parseOptional(54) ? parseType() : undefined;
+        }
+        function isStartOfLeftHandSideExpression() {
+            switch (token) {
+                case 97:
+                case 95:
+                case 93:
+                case 99:
+                case 84:
+                case 8:
+                case 9:
+                case 11:
+                case 12:
+                case 17:
+                case 19:
+                case 15:
+                case 87:
+                case 73:
+                case 92:
+                case 39:
+                case 61:
+                case 69:
+                    return true;
+                default:
+                    return isIdentifier();
+            }
+        }
+        function isStartOfExpression() {
+            if (isStartOfLeftHandSideExpression()) {
+                return true;
+            }
+            switch (token) {
+                case 35:
+                case 36:
+                case 50:
+                case 49:
+                case 78:
+                case 101:
+                case 103:
+                case 41:
+                case 42:
+                case 25:
+                case 119:
+                case 114:
+                    return true;
+                default:
+                    if (isBinaryOperator()) {
+                        return true;
+                    }
+                    return isIdentifier();
+            }
+        }
+        function isStartOfExpressionStatement() {
+            return token !== 15 &&
+                token !== 87 &&
+                token !== 73 &&
+                token !== 55 &&
+                isStartOfExpression();
+        }
+        function parseExpression() {
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(false);
+            }
+            var expr = parseAssignmentExpressionOrHigher();
+            var operatorToken;
+            while ((operatorToken = parseOptionalToken(24))) {
+                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
+            }
+            if (saveDecoratorContext) {
+                setDecoratorContext(true);
+            }
+            return expr;
+        }
+        function parseInitializer(inParameter) {
+            if (token !== 56) {
+                if (scanner.hasPrecedingLineBreak() || (inParameter && token === 15) || !isStartOfExpression()) {
+                    return undefined;
+                }
+            }
+            parseExpected(56);
+            return parseAssignmentExpressionOrHigher();
+        }
+        function parseAssignmentExpressionOrHigher() {
+            if (isYieldExpression()) {
+                return parseYieldExpression();
+            }
+            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
+            if (arrowExpression) {
+                return arrowExpression;
+            }
+            var expr = parseBinaryExpressionOrHigher(0);
+            if (expr.kind === 69 && token === 34) {
+                return parseSimpleArrowFunctionExpression(expr);
+            }
+            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
+                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
+            }
+            return parseConditionalExpressionRest(expr);
+        }
+        function isYieldExpression() {
+            if (token === 114) {
+                if (inYieldContext()) {
+                    return true;
+                }
+                return lookAhead(nextTokenIsIdentifierOrKeywordOrNumberOnSameLine);
+            }
+            return false;
+        }
+        function nextTokenIsIdentifierOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && isIdentifier();
+        }
+        function parseYieldExpression() {
+            var node = createNode(190);
+            nextToken();
+            if (!scanner.hasPrecedingLineBreak() &&
+                (token === 37 || isStartOfExpression())) {
+                node.asteriskToken = parseOptionalToken(37);
+                node.expression = parseAssignmentExpressionOrHigher();
+                return finishNode(node);
+            }
+            else {
+                return finishNode(node);
+            }
+        }
+        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
+            ts.Debug.assert(token === 34, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
+            var node;
+            if (asyncModifier) {
+                node = createNode(180, asyncModifier.pos);
+                setModifiers(node, asyncModifier);
+            }
+            else {
+                node = createNode(180, identifier.pos);
+            }
+            var parameter = createNode(142, identifier.pos);
+            parameter.name = identifier;
+            finishNode(parameter);
+            node.parameters = [parameter];
+            node.parameters.pos = parameter.pos;
+            node.parameters.end = parameter.end;
+            node.equalsGreaterThanToken = parseExpectedToken(34, false, ts.Diagnostics._0_expected, "=>");
+            node.body = parseArrowFunctionExpressionBody(!!asyncModifier);
+            return finishNode(node);
+        }
+        function tryParseParenthesizedArrowFunctionExpression() {
+            var triState = isParenthesizedArrowFunctionExpression();
+            if (triState === 0) {
+                return undefined;
+            }
+            var arrowFunction = triState === 1
+                ? parseParenthesizedArrowFunctionExpressionHead(true)
+                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
+            if (!arrowFunction) {
+                return undefined;
+            }
+            var isAsync = !!(arrowFunction.flags & 256);
+            var lastToken = token;
+            arrowFunction.equalsGreaterThanToken = parseExpectedToken(34, false, ts.Diagnostics._0_expected, "=>");
+            arrowFunction.body = (lastToken === 34 || lastToken === 15)
+                ? parseArrowFunctionExpressionBody(isAsync)
+                : parseIdentifier();
+            return finishNode(arrowFunction);
+        }
+        function isParenthesizedArrowFunctionExpression() {
+            if (token === 17 || token === 25 || token === 118) {
+                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
+            }
+            if (token === 34) {
+                return 1;
+            }
+            return 0;
+        }
+        function isParenthesizedArrowFunctionExpressionWorker() {
+            if (token === 118) {
+                nextToken();
+                if (scanner.hasPrecedingLineBreak()) {
+                    return 0;
+                }
+                if (token !== 17 && token !== 25) {
+                    return 0;
+                }
+            }
+            var first = token;
+            var second = nextToken();
+            if (first === 17) {
+                if (second === 18) {
+                    var third = nextToken();
+                    switch (third) {
+                        case 34:
+                        case 54:
+                        case 15:
+                            return 1;
+                        default:
+                            return 0;
+                    }
+                }
+                if (second === 19 || second === 15) {
+                    return 2;
+                }
+                if (second === 22) {
+                    return 1;
+                }
+                if (!isIdentifier()) {
+                    return 0;
+                }
+                if (nextToken() === 54) {
+                    return 1;
+                }
+                return 2;
+            }
+            else {
+                ts.Debug.assert(first === 25);
+                if (!isIdentifier()) {
+                    return 0;
+                }
+                if (sourceFile.languageVariant === 1) {
+                    var isArrowFunctionInJsx = lookAhead(function () {
+                        var third = nextToken();
+                        if (third === 83) {
+                            var fourth = nextToken();
+                            switch (fourth) {
+                                case 56:
+                                case 27:
+                                    return false;
+                                default:
+                                    return true;
+                            }
+                        }
+                        else if (third === 24) {
+                            return true;
+                        }
+                        return false;
+                    });
+                    if (isArrowFunctionInJsx) {
+                        return 1;
+                    }
+                    return 0;
+                }
+                return 2;
+            }
+        }
+        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
+            return parseParenthesizedArrowFunctionExpressionHead(false);
+        }
+        function tryParseAsyncSimpleArrowFunctionExpression() {
+            if (token === 118) {
+                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
+                if (isUnParenthesizedAsyncArrowFunction === 1) {
+                    var asyncModifier = parseModifiersForArrowFunction();
+                    var expr = parseBinaryExpressionOrHigher(0);
+                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
+                }
+            }
+            return undefined;
+        }
+        function isUnParenthesizedAsyncArrowFunctionWorker() {
+            if (token === 118) {
+                nextToken();
+                if (scanner.hasPrecedingLineBreak() || token === 34) {
+                    return 0;
+                }
+                var expr = parseBinaryExpressionOrHigher(0);
+                if (!scanner.hasPrecedingLineBreak() && expr.kind === 69 && token === 34) {
+                    return 1;
+                }
+            }
+            return 0;
+        }
+        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
+            var node = createNode(180);
+            setModifiers(node, parseModifiersForArrowFunction());
+            var isAsync = !!(node.flags & 256);
+            fillSignature(54, false, isAsync, !allowAmbiguity, node);
+            if (!node.parameters) {
+                return undefined;
+            }
+            if (!allowAmbiguity && token !== 34 && token !== 15) {
+                return undefined;
+            }
+            return node;
+        }
+        function parseArrowFunctionExpressionBody(isAsync) {
+            if (token === 15) {
+                return parseFunctionBlock(false, isAsync, false);
+            }
+            if (token !== 23 &&
+                token !== 87 &&
+                token !== 73 &&
+                isStartOfStatement() &&
+                !isStartOfExpressionStatement()) {
+                return parseFunctionBlock(false, isAsync, true);
+            }
+            return isAsync
+                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
+                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
+        }
+        function parseConditionalExpressionRest(leftOperand) {
+            var questionToken = parseOptionalToken(53);
+            if (!questionToken) {
+                return leftOperand;
+            }
+            var node = createNode(188, leftOperand.pos);
+            node.condition = leftOperand;
+            node.questionToken = questionToken;
+            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
+            node.colonToken = parseExpectedToken(54, false, ts.Diagnostics._0_expected, ts.tokenToString(54));
+            node.whenFalse = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
+        }
+        function parseBinaryExpressionOrHigher(precedence) {
+            var leftOperand = parseUnaryExpressionOrHigher();
+            return parseBinaryExpressionRest(precedence, leftOperand);
+        }
+        function isInOrOfKeyword(t) {
+            return t === 90 || t === 138;
+        }
+        function parseBinaryExpressionRest(precedence, leftOperand) {
+            while (true) {
+                reScanGreaterToken();
+                var newPrecedence = getBinaryOperatorPrecedence();
+                var consumeCurrentOperator = token === 38 ?
+                    newPrecedence >= precedence :
+                    newPrecedence > precedence;
+                if (!consumeCurrentOperator) {
+                    break;
+                }
+                if (token === 90 && inDisallowInContext()) {
+                    break;
+                }
+                if (token === 116) {
+                    if (scanner.hasPrecedingLineBreak()) {
+                        break;
+                    }
+                    else {
+                        nextToken();
+                        leftOperand = makeAsExpression(leftOperand, parseType());
+                    }
+                }
+                else {
+                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
+                }
+            }
+            return leftOperand;
+        }
+        function isBinaryOperator() {
+            if (inDisallowInContext() && token === 90) {
+                return false;
+            }
+            return getBinaryOperatorPrecedence() > 0;
+        }
+        function getBinaryOperatorPrecedence() {
+            switch (token) {
+                case 52:
+                    return 1;
+                case 51:
+                    return 2;
+                case 47:
+                    return 3;
+                case 48:
+                    return 4;
+                case 46:
+                    return 5;
+                case 30:
+                case 31:
+                case 32:
+                case 33:
+                    return 6;
+                case 25:
+                case 27:
+                case 28:
+                case 29:
+                case 91:
+                case 90:
+                case 116:
+                    return 7;
+                case 43:
+                case 44:
+                case 45:
+                    return 8;
+                case 35:
+                case 36:
+                    return 9;
+                case 37:
+                case 39:
+                case 40:
+                    return 10;
+                case 38:
+                    return 11;
+            }
+            return -1;
+        }
+        function makeBinaryExpression(left, operatorToken, right) {
+            var node = createNode(187, left.pos);
+            node.left = left;
+            node.operatorToken = operatorToken;
+            node.right = right;
+            return finishNode(node);
+        }
+        function makeAsExpression(left, right) {
+            var node = createNode(195, left.pos);
+            node.expression = left;
+            node.type = right;
+            return finishNode(node);
+        }
+        function parsePrefixUnaryExpression() {
+            var node = createNode(185);
+            node.operator = token;
+            nextToken();
+            node.operand = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseDeleteExpression() {
+            var node = createNode(181);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseTypeOfExpression() {
+            var node = createNode(182);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseVoidExpression() {
+            var node = createNode(183);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function isAwaitExpression() {
+            if (token === 119) {
+                if (inAwaitContext()) {
+                    return true;
+                }
+                return lookAhead(nextTokenIsIdentifierOnSameLine);
+            }
+            return false;
+        }
+        function parseAwaitExpression() {
+            var node = createNode(184);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseUnaryExpressionOrHigher() {
+            if (isAwaitExpression()) {
+                return parseAwaitExpression();
+            }
+            if (isIncrementExpression()) {
+                var incrementExpression = parseIncrementExpression();
+                return token === 38 ?
+                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), incrementExpression) :
+                    incrementExpression;
+            }
+            var unaryOperator = token;
+            var simpleUnaryExpression = parseSimpleUnaryExpression();
+            if (token === 38) {
+                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
+                if (simpleUnaryExpression.kind === 177) {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
+                }
+                else {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
+                }
+            }
+            return simpleUnaryExpression;
+        }
+        function parseSimpleUnaryExpression() {
+            switch (token) {
+                case 35:
+                case 36:
+                case 50:
+                case 49:
+                    return parsePrefixUnaryExpression();
+                case 78:
+                    return parseDeleteExpression();
+                case 101:
+                    return parseTypeOfExpression();
+                case 103:
+                    return parseVoidExpression();
+                case 25:
+                    return parseTypeAssertion();
+                default:
+                    return parseIncrementExpression();
+            }
+        }
+        function isIncrementExpression() {
+            switch (token) {
+                case 35:
+                case 36:
+                case 50:
+                case 49:
+                case 78:
+                case 101:
+                case 103:
+                    return false;
+                case 25:
+                    if (sourceFile.languageVariant !== 1) {
+                        return false;
+                    }
+                default:
+                    return true;
+            }
+        }
+        function parseIncrementExpression() {
+            if (token === 41 || token === 42) {
+                var node = createNode(185);
+                node.operator = token;
+                nextToken();
+                node.operand = parseLeftHandSideExpressionOrHigher();
+                return finishNode(node);
+            }
+            else if (sourceFile.languageVariant === 1 && token === 25 && lookAhead(nextTokenIsIdentifierOrKeyword)) {
+                return parseJsxElementOrSelfClosingElement(true);
+            }
+            var expression = parseLeftHandSideExpressionOrHigher();
+            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
+            if ((token === 41 || token === 42) && !scanner.hasPrecedingLineBreak()) {
+                var node = createNode(186, expression.pos);
+                node.operand = expression;
+                node.operator = token;
+                nextToken();
+                return finishNode(node);
+            }
+            return expression;
+        }
+        function parseLeftHandSideExpressionOrHigher() {
+            var expression = token === 95
+                ? parseSuperExpression()
+                : parseMemberExpressionOrHigher();
+            return parseCallExpressionRest(expression);
+        }
+        function parseMemberExpressionOrHigher() {
+            var expression = parsePrimaryExpression();
+            return parseMemberExpressionRest(expression);
+        }
+        function parseSuperExpression() {
+            var expression = parseTokenNode();
+            if (token === 17 || token === 21 || token === 19) {
+                return expression;
+            }
+            var node = createNode(172, expression.pos);
+            node.expression = expression;
+            node.dotToken = parseExpectedToken(21, false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
+            node.name = parseRightSideOfDot(true);
+            return finishNode(node);
+        }
+        function tagNamesAreEquivalent(lhs, rhs) {
+            if (lhs.kind !== rhs.kind) {
+                return false;
+            }
+            if (lhs.kind === 69) {
+                return lhs.text === rhs.text;
+            }
+            return lhs.right.text === rhs.right.text &&
+                tagNamesAreEquivalent(lhs.left, rhs.left);
+        }
+        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
+            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
+            var result;
+            if (opening.kind === 243) {
+                var node = createNode(241, opening.pos);
+                node.openingElement = opening;
+                node.children = parseJsxChildren(node.openingElement.tagName);
+                node.closingElement = parseJsxClosingElement(inExpressionContext);
+                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
+                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
+                }
+                result = finishNode(node);
+            }
+            else {
+                ts.Debug.assert(opening.kind === 242);
+                result = opening;
+            }
+            if (inExpressionContext && token === 25) {
+                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(true); });
+                if (invalidElement) {
+                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
+                    var badNode = createNode(187, result.pos);
+                    badNode.end = invalidElement.end;
+                    badNode.left = result;
+                    badNode.right = invalidElement;
+                    badNode.operatorToken = createMissingNode(24, false, undefined);
+                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
+                    return badNode;
+                }
+            }
+            return result;
+        }
+        function parseJsxText() {
+            var node = createNode(244, scanner.getStartPos());
+            token = scanner.scanJsxToken();
+            return finishNode(node);
+        }
+        function parseJsxChild() {
+            switch (token) {
+                case 244:
+                    return parseJsxText();
+                case 15:
+                    return parseJsxExpression(false);
+                case 25:
+                    return parseJsxElementOrSelfClosingElement(false);
+            }
+            ts.Debug.fail("Unknown JSX child kind " + token);
+        }
+        function parseJsxChildren(openingTagName) {
+            var result = [];
+            result.pos = scanner.getStartPos();
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << 14;
+            while (true) {
+                token = scanner.reScanJsxToken();
+                if (token === 26) {
+                    break;
+                }
+                else if (token === 1) {
+                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
+                    break;
+                }
+                result.push(parseJsxChild());
+            }
+            result.end = scanner.getTokenPos();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
+            var fullStart = scanner.getStartPos();
+            parseExpected(25);
+            var tagName = parseJsxElementName();
+            var attributes = parseList(13, parseJsxAttribute);
+            var node;
+            if (token === 27) {
+                node = createNode(243, fullStart);
+                scanJsxText();
+            }
+            else {
+                parseExpected(39);
+                if (inExpressionContext) {
+                    parseExpected(27);
+                }
+                else {
+                    parseExpected(27, undefined, false);
+                    scanJsxText();
+                }
+                node = createNode(242, fullStart);
+            }
+            node.tagName = tagName;
+            node.attributes = attributes;
+            return finishNode(node);
+        }
+        function parseJsxElementName() {
+            scanJsxIdentifier();
+            var elementName = parseIdentifierName();
+            while (parseOptional(21)) {
+                scanJsxIdentifier();
+                var node = createNode(139, elementName.pos);
+                node.left = elementName;
+                node.right = parseIdentifierName();
+                elementName = finishNode(node);
+            }
+            return elementName;
+        }
+        function parseJsxExpression(inExpressionContext) {
+            var node = createNode(248);
+            parseExpected(15);
+            if (token !== 16) {
+                node.expression = parseAssignmentExpressionOrHigher();
+            }
+            if (inExpressionContext) {
+                parseExpected(16);
+            }
+            else {
+                parseExpected(16, undefined, false);
+                scanJsxText();
+            }
+            return finishNode(node);
+        }
+        function parseJsxAttribute() {
+            if (token === 15) {
+                return parseJsxSpreadAttribute();
+            }
+            scanJsxIdentifier();
+            var node = createNode(246);
+            node.name = parseIdentifierName();
+            if (parseOptional(56)) {
+                switch (token) {
+                    case 9:
+                        node.initializer = parseLiteralNode();
+                        break;
+                    default:
+                        node.initializer = parseJsxExpression(true);
+                        break;
+                }
+            }
+            return finishNode(node);
+        }
+        function parseJsxSpreadAttribute() {
+            var node = createNode(247);
+            parseExpected(15);
+            parseExpected(22);
+            node.expression = parseExpression();
+            parseExpected(16);
+            return finishNode(node);
+        }
+        function parseJsxClosingElement(inExpressionContext) {
+            var node = createNode(245);
+            parseExpected(26);
+            node.tagName = parseJsxElementName();
+            if (inExpressionContext) {
+                parseExpected(27);
+            }
+            else {
+                parseExpected(27, undefined, false);
+                scanJsxText();
+            }
+            return finishNode(node);
+        }
+        function parseTypeAssertion() {
+            var node = createNode(177);
+            parseExpected(25);
+            node.type = parseType();
+            parseExpected(27);
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseMemberExpressionRest(expression) {
+            while (true) {
+                var dotToken = parseOptionalToken(21);
+                if (dotToken) {
+                    var propertyAccess = createNode(172, expression.pos);
+                    propertyAccess.expression = expression;
+                    propertyAccess.dotToken = dotToken;
+                    propertyAccess.name = parseRightSideOfDot(true);
+                    expression = finishNode(propertyAccess);
+                    continue;
+                }
+                if (token === 49 && !scanner.hasPrecedingLineBreak()) {
+                    nextToken();
+                    var nonNullExpression = createNode(196, expression.pos);
+                    nonNullExpression.expression = expression;
+                    expression = finishNode(nonNullExpression);
+                    continue;
+                }
+                if (!inDecoratorContext() && parseOptional(19)) {
+                    var indexedAccess = createNode(173, expression.pos);
+                    indexedAccess.expression = expression;
+                    if (token !== 20) {
+                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
+                        if (indexedAccess.argumentExpression.kind === 9 || indexedAccess.argumentExpression.kind === 8) {
+                            var literal = indexedAccess.argumentExpression;
+                            literal.text = internIdentifier(literal.text);
+                        }
+                    }
+                    parseExpected(20);
+                    expression = finishNode(indexedAccess);
+                    continue;
+                }
+                if (token === 11 || token === 12) {
+                    var tagExpression = createNode(176, expression.pos);
+                    tagExpression.tag = expression;
+                    tagExpression.template = token === 11
+                        ? parseLiteralNode()
+                        : parseTemplateExpression();
+                    expression = finishNode(tagExpression);
+                    continue;
+                }
+                return expression;
+            }
+        }
+        function parseCallExpressionRest(expression) {
+            while (true) {
+                expression = parseMemberExpressionRest(expression);
+                if (token === 25) {
+                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
+                    if (!typeArguments) {
+                        return expression;
+                    }
+                    var callExpr = createNode(174, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.typeArguments = typeArguments;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                else if (token === 17) {
+                    var callExpr = createNode(174, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                return expression;
+            }
+        }
+        function parseArgumentList() {
+            parseExpected(17);
+            var result = parseDelimitedList(11, parseArgumentExpression);
+            parseExpected(18);
+            return result;
+        }
+        function parseTypeArgumentsInExpression() {
+            if (!parseOptional(25)) {
+                return undefined;
+            }
+            var typeArguments = parseDelimitedList(18, parseType);
+            if (!parseExpected(27)) {
+                return undefined;
+            }
+            return typeArguments && canFollowTypeArgumentsInExpression()
+                ? typeArguments
+                : undefined;
+        }
+        function canFollowTypeArgumentsInExpression() {
+            switch (token) {
+                case 17:
+                case 21:
+                case 18:
+                case 20:
+                case 54:
+                case 23:
+                case 53:
+                case 30:
+                case 32:
+                case 31:
+                case 33:
+                case 51:
+                case 52:
+                case 48:
+                case 46:
+                case 47:
+                case 16:
+                case 1:
+                    return true;
+                case 24:
+                case 15:
+                default:
+                    return false;
+            }
+        }
+        function parsePrimaryExpression() {
+            switch (token) {
+                case 8:
+                case 9:
+                case 11:
+                    return parseLiteralNode();
+                case 97:
+                case 95:
+                case 93:
+                case 99:
+                case 84:
+                    return parseTokenNode();
+                case 17:
+                    return parseParenthesizedExpression();
+                case 19:
+                    return parseArrayLiteralExpression();
+                case 15:
+                    return parseObjectLiteralExpression();
+                case 118:
+                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
+                        break;
+                    }
+                    return parseFunctionExpression();
+                case 73:
+                    return parseClassExpression();
+                case 87:
+                    return parseFunctionExpression();
+                case 92:
+                    return parseNewExpression();
+                case 39:
+                case 61:
+                    if (reScanSlashToken() === 10) {
+                        return parseLiteralNode();
+                    }
+                    break;
+                case 12:
+                    return parseTemplateExpression();
+            }
+            return parseIdentifier(ts.Diagnostics.Expression_expected);
+        }
+        function parseParenthesizedExpression() {
+            var node = createNode(178);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            return finishNode(node);
+        }
+        function parseSpreadElement() {
+            var node = createNode(191);
+            parseExpected(22);
+            node.expression = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
+        }
+        function parseArgumentOrArrayLiteralElement() {
+            return token === 22 ? parseSpreadElement() :
+                token === 24 ? createNode(193) :
+                    parseAssignmentExpressionOrHigher();
+        }
+        function parseArgumentExpression() {
+            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
+        }
+        function parseArrayLiteralExpression() {
+            var node = createNode(170);
+            parseExpected(19);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.elements = parseDelimitedList(15, parseArgumentOrArrayLiteralElement);
+            parseExpected(20);
+            return finishNode(node);
+        }
+        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
+            if (parseContextualModifier(123)) {
+                return addJSDocComment(parseAccessorDeclaration(149, fullStart, decorators, modifiers));
+            }
+            else if (parseContextualModifier(131)) {
+                return parseAccessorDeclaration(150, fullStart, decorators, modifiers);
+            }
+            return undefined;
+        }
+        function parseObjectLiteralElement() {
+            var fullStart = scanner.getStartPos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
+            }
+            var asteriskToken = parseOptionalToken(37);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            var questionToken = parseOptionalToken(53);
+            if (asteriskToken || token === 17 || token === 25) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
+            }
+            var isShorthandPropertyAssignment = tokenIsIdentifier && (token === 24 || token === 16 || token === 56);
+            if (isShorthandPropertyAssignment) {
+                var shorthandDeclaration = createNode(254, fullStart);
+                shorthandDeclaration.name = propertyName;
+                shorthandDeclaration.questionToken = questionToken;
+                var equalsToken = parseOptionalToken(56);
+                if (equalsToken) {
+                    shorthandDeclaration.equalsToken = equalsToken;
+                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                }
+                return addJSDocComment(finishNode(shorthandDeclaration));
+            }
+            else {
+                var propertyAssignment = createNode(253, fullStart);
+                propertyAssignment.modifiers = modifiers;
+                propertyAssignment.name = propertyName;
+                propertyAssignment.questionToken = questionToken;
+                parseExpected(54);
+                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                return addJSDocComment(finishNode(propertyAssignment));
+            }
+        }
+        function parseObjectLiteralExpression() {
+            var node = createNode(171);
+            parseExpected(15);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.properties = parseDelimitedList(12, parseObjectLiteralElement, true);
+            parseExpected(16);
+            return finishNode(node);
+        }
+        function parseFunctionExpression() {
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(false);
+            }
+            var node = createNode(179);
+            setModifiers(node, parseModifiers());
+            parseExpected(87);
+            node.asteriskToken = parseOptionalToken(37);
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = !!(node.flags & 256);
+            node.name =
+                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
+                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
+                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
+                            parseOptionalIdentifier();
+            fillSignature(54, isGenerator, isAsync, false, node);
+            node.body = parseFunctionBlock(isGenerator, isAsync, false);
+            if (saveDecoratorContext) {
+                setDecoratorContext(true);
+            }
+            return addJSDocComment(finishNode(node));
+        }
+        function parseOptionalIdentifier() {
+            return isIdentifier() ? parseIdentifier() : undefined;
+        }
+        function parseNewExpression() {
+            var node = createNode(175);
+            parseExpected(92);
+            node.expression = parseMemberExpressionOrHigher();
+            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
+            if (node.typeArguments || token === 17) {
+                node.arguments = parseArgumentList();
+            }
+            return finishNode(node);
+        }
+        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
+            var node = createNode(199);
+            if (parseExpected(15, diagnosticMessage) || ignoreMissingOpenBrace) {
+                node.statements = parseList(1, parseStatement);
+                parseExpected(16);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
+            var savedYieldContext = inYieldContext();
+            setYieldContext(allowYield);
+            var savedAwaitContext = inAwaitContext();
+            setAwaitContext(allowAwait);
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(false);
+            }
+            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
+            if (saveDecoratorContext) {
+                setDecoratorContext(true);
+            }
+            setYieldContext(savedYieldContext);
+            setAwaitContext(savedAwaitContext);
+            return block;
+        }
+        function parseEmptyStatement() {
+            var node = createNode(201);
+            parseExpected(23);
+            return finishNode(node);
+        }
+        function parseIfStatement() {
+            var node = createNode(203);
+            parseExpected(88);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            node.thenStatement = parseStatement();
+            node.elseStatement = parseOptional(80) ? parseStatement() : undefined;
+            return finishNode(node);
+        }
+        function parseDoStatement() {
+            var node = createNode(204);
+            parseExpected(79);
+            node.statement = parseStatement();
+            parseExpected(104);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            parseOptional(23);
+            return finishNode(node);
+        }
+        function parseWhileStatement() {
+            var node = createNode(205);
+            parseExpected(104);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            node.statement = parseStatement();
+            return finishNode(node);
+        }
+        function parseForOrForInOrForOfStatement() {
+            var pos = getNodePos();
+            parseExpected(86);
+            parseExpected(17);
+            var initializer = undefined;
+            if (token !== 23) {
+                if (token === 102 || token === 108 || token === 74) {
+                    initializer = parseVariableDeclarationList(true);
+                }
+                else {
+                    initializer = disallowInAnd(parseExpression);
+                }
+            }
+            var forOrForInOrForOfStatement;
+            if (parseOptional(90)) {
+                var forInStatement = createNode(207, pos);
+                forInStatement.initializer = initializer;
+                forInStatement.expression = allowInAnd(parseExpression);
+                parseExpected(18);
+                forOrForInOrForOfStatement = forInStatement;
+            }
+            else if (parseOptional(138)) {
+                var forOfStatement = createNode(208, pos);
+                forOfStatement.initializer = initializer;
+                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
+                parseExpected(18);
+                forOrForInOrForOfStatement = forOfStatement;
+            }
+            else {
+                var forStatement = createNode(206, pos);
+                forStatement.initializer = initializer;
+                parseExpected(23);
+                if (token !== 23 && token !== 18) {
+                    forStatement.condition = allowInAnd(parseExpression);
+                }
+                parseExpected(23);
+                if (token !== 18) {
+                    forStatement.incrementor = allowInAnd(parseExpression);
+                }
+                parseExpected(18);
+                forOrForInOrForOfStatement = forStatement;
+            }
+            forOrForInOrForOfStatement.statement = parseStatement();
+            return finishNode(forOrForInOrForOfStatement);
+        }
+        function parseBreakOrContinueStatement(kind) {
+            var node = createNode(kind);
+            parseExpected(kind === 210 ? 70 : 75);
+            if (!canParseSemicolon()) {
+                node.label = parseIdentifier();
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseReturnStatement() {
+            var node = createNode(211);
+            parseExpected(94);
+            if (!canParseSemicolon()) {
+                node.expression = allowInAnd(parseExpression);
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseWithStatement() {
+            var node = createNode(212);
+            parseExpected(105);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            node.statement = parseStatement();
+            return finishNode(node);
+        }
+        function parseCaseClause() {
+            var node = createNode(249);
+            parseExpected(71);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(54);
+            node.statements = parseList(3, parseStatement);
+            return finishNode(node);
+        }
+        function parseDefaultClause() {
+            var node = createNode(250);
+            parseExpected(77);
+            parseExpected(54);
+            node.statements = parseList(3, parseStatement);
+            return finishNode(node);
+        }
+        function parseCaseOrDefaultClause() {
+            return token === 71 ? parseCaseClause() : parseDefaultClause();
+        }
+        function parseSwitchStatement() {
+            var node = createNode(213);
+            parseExpected(96);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            var caseBlock = createNode(227, scanner.getStartPos());
+            parseExpected(15);
+            caseBlock.clauses = parseList(2, parseCaseOrDefaultClause);
+            parseExpected(16);
+            node.caseBlock = finishNode(caseBlock);
+            return finishNode(node);
+        }
+        function parseThrowStatement() {
+            var node = createNode(215);
+            parseExpected(98);
+            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseTryStatement() {
+            var node = createNode(216);
+            parseExpected(100);
+            node.tryBlock = parseBlock(false);
+            node.catchClause = token === 72 ? parseCatchClause() : undefined;
+            if (!node.catchClause || token === 85) {
+                parseExpected(85);
+                node.finallyBlock = parseBlock(false);
+            }
+            return finishNode(node);
+        }
+        function parseCatchClause() {
+            var result = createNode(252);
+            parseExpected(72);
+            if (parseExpected(17)) {
+                result.variableDeclaration = parseVariableDeclaration();
+            }
+            parseExpected(18);
+            result.block = parseBlock(false);
+            return finishNode(result);
+        }
+        function parseDebuggerStatement() {
+            var node = createNode(217);
+            parseExpected(76);
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseExpressionOrLabeledStatement() {
+            var fullStart = scanner.getStartPos();
+            var expression = allowInAnd(parseExpression);
+            if (expression.kind === 69 && parseOptional(54)) {
+                var labeledStatement = createNode(214, fullStart);
+                labeledStatement.label = expression;
+                labeledStatement.statement = parseStatement();
+                return addJSDocComment(finishNode(labeledStatement));
+            }
+            else {
+                var expressionStatement = createNode(202, fullStart);
+                expressionStatement.expression = expression;
+                parseSemicolon();
+                return addJSDocComment(finishNode(expressionStatement));
+            }
+        }
+        function nextTokenIsIdentifierOrKeywordOnSameLine() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token) && !scanner.hasPrecedingLineBreak();
+        }
+        function nextTokenIsFunctionKeywordOnSameLine() {
+            nextToken();
+            return token === 87 && !scanner.hasPrecedingLineBreak();
+        }
+        function nextTokenIsIdentifierOrKeywordOrNumberOnSameLine() {
+            nextToken();
+            return (ts.tokenIsIdentifierOrKeyword(token) || token === 8) && !scanner.hasPrecedingLineBreak();
+        }
+        function isDeclaration() {
+            while (true) {
+                switch (token) {
+                    case 102:
+                    case 108:
+                    case 74:
+                    case 87:
+                    case 73:
+                    case 81:
+                        return true;
+                    case 107:
+                    case 134:
+                        return nextTokenIsIdentifierOnSameLine();
+                    case 125:
+                    case 126:
+                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
+                    case 115:
+                    case 118:
+                    case 122:
+                    case 110:
+                    case 111:
+                    case 112:
+                    case 128:
+                        nextToken();
+                        if (scanner.hasPrecedingLineBreak()) {
+                            return false;
+                        }
+                        continue;
+                    case 137:
+                        nextToken();
+                        return token === 15 || token === 69 || token === 82;
+                    case 89:
+                        nextToken();
+                        return token === 9 || token === 37 ||
+                            token === 15 || ts.tokenIsIdentifierOrKeyword(token);
+                    case 82:
+                        nextToken();
+                        if (token === 56 || token === 37 ||
+                            token === 15 || token === 77 ||
+                            token === 116) {
+                            return true;
+                        }
+                        continue;
+                    case 113:
+                        nextToken();
+                        continue;
+                    default:
+                        return false;
+                }
+            }
+        }
+        function isStartOfDeclaration() {
+            return lookAhead(isDeclaration);
+        }
+        function isStartOfStatement() {
+            switch (token) {
+                case 55:
+                case 23:
+                case 15:
+                case 102:
+                case 108:
+                case 87:
+                case 73:
+                case 81:
+                case 88:
+                case 79:
+                case 104:
+                case 86:
+                case 75:
+                case 70:
+                case 94:
+                case 105:
+                case 96:
+                case 98:
+                case 100:
+                case 76:
+                case 72:
+                case 85:
+                    return true;
+                case 74:
+                case 82:
+                case 89:
+                    return isStartOfDeclaration();
+                case 118:
+                case 122:
+                case 107:
+                case 125:
+                case 126:
+                case 134:
+                case 137:
+                    return true;
+                case 112:
+                case 110:
+                case 111:
+                case 113:
+                case 128:
+                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                default:
+                    return isStartOfExpression();
+            }
+        }
+        function nextTokenIsIdentifierOrStartOfDestructuring() {
+            nextToken();
+            return isIdentifier() || token === 15 || token === 19;
+        }
+        function isLetDeclaration() {
+            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
+        }
+        function parseStatement() {
+            switch (token) {
+                case 23:
+                    return parseEmptyStatement();
+                case 15:
+                    return parseBlock(false);
+                case 102:
+                    return parseVariableStatement(scanner.getStartPos(), undefined, undefined);
+                case 108:
+                    if (isLetDeclaration()) {
+                        return parseVariableStatement(scanner.getStartPos(), undefined, undefined);
+                    }
+                    break;
+                case 87:
+                    return parseFunctionDeclaration(scanner.getStartPos(), undefined, undefined);
+                case 73:
+                    return parseClassDeclaration(scanner.getStartPos(), undefined, undefined);
+                case 88:
+                    return parseIfStatement();
+                case 79:
+                    return parseDoStatement();
+                case 104:
+                    return parseWhileStatement();
+                case 86:
+                    return parseForOrForInOrForOfStatement();
+                case 75:
+                    return parseBreakOrContinueStatement(209);
+                case 70:
+                    return parseBreakOrContinueStatement(210);
+                case 94:
+                    return parseReturnStatement();
+                case 105:
+                    return parseWithStatement();
+                case 96:
+                    return parseSwitchStatement();
+                case 98:
+                    return parseThrowStatement();
+                case 100:
+                case 72:
+                case 85:
+                    return parseTryStatement();
+                case 76:
+                    return parseDebuggerStatement();
+                case 55:
+                    return parseDeclaration();
+                case 118:
+                case 107:
+                case 134:
+                case 125:
+                case 126:
+                case 122:
+                case 74:
+                case 81:
+                case 82:
+                case 89:
+                case 110:
+                case 111:
+                case 112:
+                case 115:
+                case 113:
+                case 128:
+                case 137:
+                    if (isStartOfDeclaration()) {
+                        return parseDeclaration();
+                    }
+                    break;
+            }
+            return parseExpressionOrLabeledStatement();
+        }
+        function parseDeclaration() {
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            switch (token) {
+                case 102:
+                case 108:
+                case 74:
+                    return parseVariableStatement(fullStart, decorators, modifiers);
+                case 87:
+                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
+                case 73:
+                    return parseClassDeclaration(fullStart, decorators, modifiers);
+                case 107:
+                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
+                case 134:
+                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
+                case 81:
+                    return parseEnumDeclaration(fullStart, decorators, modifiers);
+                case 137:
+                case 125:
+                case 126:
+                    return parseModuleDeclaration(fullStart, decorators, modifiers);
+                case 89:
+                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
+                case 82:
+                    nextToken();
+                    switch (token) {
+                        case 77:
+                        case 56:
+                            return parseExportAssignment(fullStart, decorators, modifiers);
+                        case 116:
+                            return parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers);
+                        default:
+                            return parseExportDeclaration(fullStart, decorators, modifiers);
+                    }
+                default:
+                    if (decorators || modifiers) {
+                        var node = createMissingNode(239, true, ts.Diagnostics.Declaration_expected);
+                        node.pos = fullStart;
+                        node.decorators = decorators;
+                        setModifiers(node, modifiers);
+                        return finishNode(node);
+                    }
+            }
+        }
+        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token === 9);
+        }
+        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
+            if (token !== 15 && canParseSemicolon()) {
+                parseSemicolon();
+                return;
+            }
+            return parseFunctionBlock(isGenerator, isAsync, false, diagnosticMessage);
+        }
+        function parseArrayBindingElement() {
+            if (token === 24) {
+                return createNode(193);
+            }
+            var node = createNode(169);
+            node.dotDotDotToken = parseOptionalToken(22);
+            node.name = parseIdentifierOrPattern();
+            node.initializer = parseBindingElementInitializer(false);
+            return finishNode(node);
+        }
+        function parseObjectBindingElement() {
+            var node = createNode(169);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            if (tokenIsIdentifier && token !== 54) {
+                node.name = propertyName;
+            }
+            else {
+                parseExpected(54);
+                node.propertyName = propertyName;
+                node.name = parseIdentifierOrPattern();
+            }
+            node.initializer = parseBindingElementInitializer(false);
+            return finishNode(node);
+        }
+        function parseObjectBindingPattern() {
+            var node = createNode(167);
+            parseExpected(15);
+            node.elements = parseDelimitedList(9, parseObjectBindingElement);
+            parseExpected(16);
+            return finishNode(node);
+        }
+        function parseArrayBindingPattern() {
+            var node = createNode(168);
+            parseExpected(19);
+            node.elements = parseDelimitedList(10, parseArrayBindingElement);
+            parseExpected(20);
+            return finishNode(node);
+        }
+        function isIdentifierOrPattern() {
+            return token === 15 || token === 19 || isIdentifier();
+        }
+        function parseIdentifierOrPattern() {
+            if (token === 19) {
+                return parseArrayBindingPattern();
+            }
+            if (token === 15) {
+                return parseObjectBindingPattern();
+            }
+            return parseIdentifier();
+        }
+        function parseVariableDeclaration() {
+            var node = createNode(218);
+            node.name = parseIdentifierOrPattern();
+            node.type = parseTypeAnnotation();
+            if (!isInOrOfKeyword(token)) {
+                node.initializer = parseInitializer(false);
+            }
+            return finishNode(node);
+        }
+        function parseVariableDeclarationList(inForStatementInitializer) {
+            var node = createNode(219);
+            switch (token) {
+                case 102:
+                    break;
+                case 108:
+                    node.flags |= 1024;
+                    break;
+                case 74:
+                    node.flags |= 2048;
+                    break;
+                default:
+                    ts.Debug.fail();
+            }
+            nextToken();
+            if (token === 138 && lookAhead(canFollowContextualOfKeyword)) {
+                node.declarations = createMissingList();
+            }
+            else {
+                var savedDisallowIn = inDisallowInContext();
+                setDisallowInContext(inForStatementInitializer);
+                node.declarations = parseDelimitedList(8, parseVariableDeclaration);
+                setDisallowInContext(savedDisallowIn);
+            }
+            return finishNode(node);
+        }
+        function canFollowContextualOfKeyword() {
+            return nextTokenIsIdentifier() && nextToken() === 18;
+        }
+        function parseVariableStatement(fullStart, decorators, modifiers) {
+            var node = createNode(200, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.declarationList = parseVariableDeclarationList(false);
+            parseSemicolon();
+            return addJSDocComment(finishNode(node));
+        }
+        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(220, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(87);
+            node.asteriskToken = parseOptionalToken(37);
+            node.name = node.flags & 512 ? parseOptionalIdentifier() : parseIdentifier();
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = !!(node.flags & 256);
+            fillSignature(54, isGenerator, isAsync, false, node);
+            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseConstructorDeclaration(pos, decorators, modifiers) {
+            var node = createNode(148, pos);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(121);
+            fillSignature(54, false, false, false, node);
+            node.body = parseFunctionBlockOrSemicolon(false, false, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
+            var method = createNode(147, fullStart);
+            method.decorators = decorators;
+            setModifiers(method, modifiers);
+            method.asteriskToken = asteriskToken;
+            method.name = name;
+            method.questionToken = questionToken;
+            var isGenerator = !!asteriskToken;
+            var isAsync = !!(method.flags & 256);
+            fillSignature(54, isGenerator, isAsync, false, method);
+            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
+            return addJSDocComment(finishNode(method));
+        }
+        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
+            var property = createNode(145, fullStart);
+            property.decorators = decorators;
+            setModifiers(property, modifiers);
+            property.name = name;
+            property.questionToken = questionToken;
+            property.type = parseTypeAnnotation();
+            property.initializer = modifiers && modifiers.flags & 32
+                ? allowInAnd(parseNonParameterInitializer)
+                : doOutsideOfContext(8388608 | 4194304, parseNonParameterInitializer);
+            parseSemicolon();
+            return finishNode(property);
+        }
+        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
+            var asteriskToken = parseOptionalToken(37);
+            var name = parsePropertyName();
+            var questionToken = parseOptionalToken(53);
+            if (asteriskToken || token === 17 || token === 25) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
+            }
+            else {
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
+            }
+        }
+        function parseNonParameterInitializer() {
+            return parseInitializer(false);
+        }
+        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.name = parsePropertyName();
+            fillSignature(54, false, false, false, node);
+            node.body = parseFunctionBlockOrSemicolon(false, false);
+            return finishNode(node);
+        }
+        function isClassMemberModifier(idToken) {
+            switch (idToken) {
+                case 112:
+                case 110:
+                case 111:
+                case 113:
+                case 128:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isClassMemberStart() {
+            var idToken;
+            if (token === 55) {
+                return true;
+            }
+            while (ts.isModifierKind(token)) {
+                idToken = token;
+                if (isClassMemberModifier(idToken)) {
+                    return true;
+                }
+                nextToken();
+            }
+            if (token === 37) {
+                return true;
+            }
+            if (isLiteralPropertyName()) {
+                idToken = token;
+                nextToken();
+            }
+            if (token === 19) {
+                return true;
+            }
+            if (idToken !== undefined) {
+                if (!ts.isKeyword(idToken) || idToken === 131 || idToken === 123) {
+                    return true;
+                }
+                switch (token) {
+                    case 17:
+                    case 25:
+                    case 54:
+                    case 56:
+                    case 53:
+                        return true;
+                    default:
+                        return canParseSemicolon();
+                }
+            }
+            return false;
+        }
+        function parseDecorators() {
+            var decorators;
+            while (true) {
+                var decoratorStart = getNodePos();
+                if (!parseOptional(55)) {
+                    break;
+                }
+                if (!decorators) {
+                    decorators = [];
+                    decorators.pos = decoratorStart;
+                }
+                var decorator = createNode(143, decoratorStart);
+                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
+                decorators.push(finishNode(decorator));
+            }
+            if (decorators) {
+                decorators.end = getNodeEnd();
+            }
+            return decorators;
+        }
+        function parseModifiers(permitInvalidConstAsModifier) {
+            var flags = 0;
+            var modifiers;
+            while (true) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token;
+                if (token === 74 && permitInvalidConstAsModifier) {
+                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
+                        break;
+                    }
+                }
+                else {
+                    if (!parseAnyContextualModifier()) {
+                        break;
+                    }
+                }
+                if (!modifiers) {
+                    modifiers = [];
+                    modifiers.pos = modifierStart;
+                }
+                flags |= ts.modifierToFlag(modifierKind);
+                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
+            }
+            if (modifiers) {
+                modifiers.flags = flags;
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
+        }
+        function parseModifiersForArrowFunction() {
+            var flags = 0;
+            var modifiers;
+            if (token === 118) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token;
+                nextToken();
+                modifiers = [];
+                modifiers.pos = modifierStart;
+                flags |= ts.modifierToFlag(modifierKind);
+                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
+                modifiers.flags = flags;
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
+        }
+        function parseClassElement() {
+            if (token === 23) {
+                var result = createNode(198);
+                nextToken();
+                return finishNode(result);
+            }
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers(true);
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
+            }
+            if (token === 121) {
+                return parseConstructorDeclaration(fullStart, decorators, modifiers);
+            }
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
+            }
+            if (ts.tokenIsIdentifierOrKeyword(token) ||
+                token === 9 ||
+                token === 8 ||
+                token === 37 ||
+                token === 19) {
+                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
+            }
+            if (decorators || modifiers) {
+                var name_7 = createMissingNode(69, true, ts.Diagnostics.Declaration_expected);
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_7, undefined);
+            }
+            ts.Debug.fail("Should not have attempted to parse class member declaration.");
+        }
+        function parseClassExpression() {
+            return parseClassDeclarationOrExpression(scanner.getStartPos(), undefined, undefined, 192);
+        }
+        function parseClassDeclaration(fullStart, decorators, modifiers) {
+            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 221);
+        }
+        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(73);
+            node.name = parseNameOfClassDeclarationOrExpression();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses(true);
+            if (parseExpected(15)) {
+                node.members = parseClassMembers();
+                parseExpected(16);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseNameOfClassDeclarationOrExpression() {
+            return isIdentifier() && !isImplementsClause()
+                ? parseIdentifier()
+                : undefined;
+        }
+        function isImplementsClause() {
+            return token === 106 && lookAhead(nextTokenIsIdentifierOrKeyword);
+        }
+        function parseHeritageClauses(isClassHeritageClause) {
+            if (isHeritageClause()) {
+                return parseList(20, parseHeritageClause);
+            }
+            return undefined;
+        }
+        function parseHeritageClause() {
+            if (token === 83 || token === 106) {
+                var node = createNode(251);
+                node.token = token;
+                nextToken();
+                node.types = parseDelimitedList(7, parseExpressionWithTypeArguments);
+                return finishNode(node);
+            }
+            return undefined;
+        }
+        function parseExpressionWithTypeArguments() {
+            var node = createNode(194);
+            node.expression = parseLeftHandSideExpressionOrHigher();
+            if (token === 25) {
+                node.typeArguments = parseBracketedList(18, parseType, 25, 27);
+            }
+            return finishNode(node);
+        }
+        function isHeritageClause() {
+            return token === 83 || token === 106;
+        }
+        function parseClassMembers() {
+            return parseList(5, parseClassElement);
+        }
+        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(222, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(107);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses(false);
+            node.members = parseObjectTypeMembers();
+            return finishNode(node);
+        }
+        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(223, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(134);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            parseExpected(56);
+            node.type = parseType();
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseEnumMember() {
+            var node = createNode(255, scanner.getStartPos());
+            node.name = parsePropertyName();
+            node.initializer = allowInAnd(parseNonParameterInitializer);
+            return finishNode(node);
+        }
+        function parseEnumDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(224, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(81);
+            node.name = parseIdentifier();
+            if (parseExpected(15)) {
+                node.members = parseDelimitedList(6, parseEnumMember);
+                parseExpected(16);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseModuleBlock() {
+            var node = createNode(226, scanner.getStartPos());
+            if (parseExpected(15)) {
+                node.statements = parseList(1, parseStatement);
+                parseExpected(16);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
+            var node = createNode(225, fullStart);
+            var namespaceFlag = flags & 4096;
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.flags |= flags;
+            node.name = parseIdentifier();
+            node.body = parseOptional(21)
+                ? parseModuleOrNamespaceDeclaration(getNodePos(), undefined, undefined, 1 | namespaceFlag)
+                : parseModuleBlock();
+            return finishNode(node);
+        }
+        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(225, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (token === 137) {
+                node.name = parseIdentifier();
+                node.flags |= 131072;
+            }
+            else {
+                node.name = parseLiteralNode(true);
+            }
+            node.body = parseModuleBlock();
+            return finishNode(node);
+        }
+        function parseModuleDeclaration(fullStart, decorators, modifiers) {
+            var flags = modifiers ? modifiers.flags : 0;
+            if (token === 137) {
+                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+            }
+            else if (parseOptional(126)) {
+                flags |= 4096;
+            }
+            else {
+                parseExpected(125);
+                if (token === 9) {
+                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+                }
+            }
+            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
+        }
+        function isExternalModuleReference() {
+            return token === 129 &&
+                lookAhead(nextTokenIsOpenParen);
+        }
+        function nextTokenIsOpenParen() {
+            return nextToken() === 17;
+        }
+        function nextTokenIsSlash() {
+            return nextToken() === 39;
+        }
+        function parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers) {
+            var exportDeclaration = createNode(228, fullStart);
+            exportDeclaration.decorators = decorators;
+            exportDeclaration.modifiers = modifiers;
+            parseExpected(116);
+            parseExpected(126);
+            exportDeclaration.name = parseIdentifier();
+            parseExpected(23);
+            return finishNode(exportDeclaration);
+        }
+        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
+            parseExpected(89);
+            var afterImportPos = scanner.getStartPos();
+            var identifier;
+            if (isIdentifier()) {
+                identifier = parseIdentifier();
+                if (token !== 24 && token !== 136) {
+                    var importEqualsDeclaration = createNode(229, fullStart);
+                    importEqualsDeclaration.decorators = decorators;
+                    setModifiers(importEqualsDeclaration, modifiers);
+                    importEqualsDeclaration.name = identifier;
+                    parseExpected(56);
+                    importEqualsDeclaration.moduleReference = parseModuleReference();
+                    parseSemicolon();
+                    return finishNode(importEqualsDeclaration);
+                }
+            }
+            var importDeclaration = createNode(230, fullStart);
+            importDeclaration.decorators = decorators;
+            setModifiers(importDeclaration, modifiers);
+            if (identifier ||
+                token === 37 ||
+                token === 15) {
+                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
+                parseExpected(136);
+            }
+            importDeclaration.moduleSpecifier = parseModuleSpecifier();
+            parseSemicolon();
+            return finishNode(importDeclaration);
+        }
+        function parseImportClause(identifier, fullStart) {
+            var importClause = createNode(231, fullStart);
+            if (identifier) {
+                importClause.name = identifier;
+            }
+            if (!importClause.name ||
+                parseOptional(24)) {
+                importClause.namedBindings = token === 37 ? parseNamespaceImport() : parseNamedImportsOrExports(233);
+            }
+            return finishNode(importClause);
+        }
+        function parseModuleReference() {
+            return isExternalModuleReference()
+                ? parseExternalModuleReference()
+                : parseEntityName(false);
+        }
+        function parseExternalModuleReference() {
+            var node = createNode(240);
+            parseExpected(129);
+            parseExpected(17);
+            node.expression = parseModuleSpecifier();
+            parseExpected(18);
+            return finishNode(node);
+        }
+        function parseModuleSpecifier() {
+            if (token === 9) {
+                var result = parseLiteralNode();
+                internIdentifier(result.text);
+                return result;
+            }
+            else {
+                return parseExpression();
+            }
+        }
+        function parseNamespaceImport() {
+            var namespaceImport = createNode(232);
+            parseExpected(37);
+            parseExpected(116);
+            namespaceImport.name = parseIdentifier();
+            return finishNode(namespaceImport);
+        }
+        function parseNamedImportsOrExports(kind) {
+            var node = createNode(kind);
+            node.elements = parseBracketedList(21, kind === 233 ? parseImportSpecifier : parseExportSpecifier, 15, 16);
+            return finishNode(node);
+        }
+        function parseExportSpecifier() {
+            return parseImportOrExportSpecifier(238);
+        }
+        function parseImportSpecifier() {
+            return parseImportOrExportSpecifier(234);
+        }
+        function parseImportOrExportSpecifier(kind) {
+            var node = createNode(kind);
+            var checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
+            var checkIdentifierStart = scanner.getTokenPos();
+            var checkIdentifierEnd = scanner.getTextPos();
+            var identifierName = parseIdentifierName();
+            if (token === 116) {
+                node.propertyName = identifierName;
+                parseExpected(116);
+                checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
+                checkIdentifierStart = scanner.getTokenPos();
+                checkIdentifierEnd = scanner.getTextPos();
+                node.name = parseIdentifierName();
+            }
+            else {
+                node.name = identifierName;
+            }
+            if (kind === 234 && checkIdentifierIsKeyword) {
+                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
+            }
+            return finishNode(node);
+        }
+        function parseExportDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(236, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (parseOptional(37)) {
+                parseExpected(136);
+                node.moduleSpecifier = parseModuleSpecifier();
+            }
+            else {
+                node.exportClause = parseNamedImportsOrExports(237);
+                if (token === 136 || (token === 9 && !scanner.hasPrecedingLineBreak())) {
+                    parseExpected(136);
+                    node.moduleSpecifier = parseModuleSpecifier();
+                }
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseExportAssignment(fullStart, decorators, modifiers) {
+            var node = createNode(235, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (parseOptional(56)) {
+                node.isExportEquals = true;
+            }
+            else {
+                parseExpected(77);
+            }
+            node.expression = parseAssignmentExpressionOrHigher();
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function processReferenceComments(sourceFile) {
+            var triviaScanner = ts.createScanner(sourceFile.languageVersion, false, 0, sourceText);
+            var referencedFiles = [];
+            var typeReferenceDirectives = [];
+            var amdDependencies = [];
+            var amdModuleName;
+            while (true) {
+                var kind = triviaScanner.scan();
+                if (kind !== 2) {
+                    if (ts.isTrivia(kind)) {
+                        continue;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                var range = { pos: triviaScanner.getTokenPos(), end: triviaScanner.getTextPos(), kind: triviaScanner.getToken() };
+                var comment = sourceText.substring(range.pos, range.end);
+                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
+                if (referencePathMatchResult) {
+                    var fileReference = referencePathMatchResult.fileReference;
+                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
+                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
+                    if (fileReference) {
+                        if (referencePathMatchResult.isTypeReferenceDirective) {
+                            typeReferenceDirectives.push(fileReference);
+                        }
+                        else {
+                            referencedFiles.push(fileReference);
+                        }
+                    }
+                    if (diagnosticMessage) {
+                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
+                    }
+                }
+                else {
+                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
+                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
+                    if (amdModuleNameMatchResult) {
+                        if (amdModuleName) {
+                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
+                        }
+                        amdModuleName = amdModuleNameMatchResult[2];
+                    }
+                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
+                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
+                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
+                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
+                    if (amdDependencyMatchResult) {
+                        var pathMatchResult = pathRegex.exec(comment);
+                        var nameMatchResult = nameRegex.exec(comment);
+                        if (pathMatchResult) {
+                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
+                            amdDependencies.push(amdDependency);
+                        }
+                    }
+                }
+            }
+            sourceFile.referencedFiles = referencedFiles;
+            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
+            sourceFile.amdDependencies = amdDependencies;
+            sourceFile.moduleName = amdModuleName;
+        }
+        function setExternalModuleIndicator(sourceFile) {
+            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
+                return node.flags & 1
+                    || node.kind === 229 && node.moduleReference.kind === 240
+                    || node.kind === 230
+                    || node.kind === 235
+                    || node.kind === 236
+                    ? node
+                    : undefined;
+            });
+        }
+        var JSDocParser;
+        (function (JSDocParser) {
+            function isJSDocType() {
+                switch (token) {
+                    case 37:
+                    case 53:
+                    case 17:
+                    case 19:
+                    case 49:
+                    case 15:
+                    case 87:
+                    case 22:
+                    case 92:
+                    case 97:
+                        return true;
+                }
+                return ts.tokenIsIdentifierOrKeyword(token);
+            }
+            JSDocParser.isJSDocType = isJSDocType;
+            function parseJSDocTypeExpressionForTests(content, start, length) {
+                initializeState("file.js", content, 2, undefined, 1);
+                scanner.setText(content, start, length);
+                token = scanner.scan();
+                var jsDocTypeExpression = parseJSDocTypeExpression();
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+            function parseJSDocTypeExpression() {
+                var result = createNode(257, scanner.getTokenPos());
+                parseExpected(15);
+                result.type = parseJSDocTopLevelType();
+                parseExpected(16);
+                fixupParentReferences(result);
+                return finishNode(result);
+            }
+            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
+            function parseJSDocTopLevelType() {
+                var type = parseJSDocType();
+                if (token === 47) {
+                    var unionType = createNode(261, type.pos);
+                    unionType.types = parseJSDocTypeList(type);
+                    type = finishNode(unionType);
+                }
+                if (token === 56) {
+                    var optionalType = createNode(268, type.pos);
+                    nextToken();
+                    optionalType.type = type;
+                    type = finishNode(optionalType);
+                }
+                return type;
+            }
+            function parseJSDocType() {
+                var type = parseBasicTypeExpression();
+                while (true) {
+                    if (token === 19) {
+                        var arrayType = createNode(260, type.pos);
+                        arrayType.elementType = type;
+                        nextToken();
+                        parseExpected(20);
+                        type = finishNode(arrayType);
+                    }
+                    else if (token === 53) {
+                        var nullableType = createNode(263, type.pos);
+                        nullableType.type = type;
+                        nextToken();
+                        type = finishNode(nullableType);
+                    }
+                    else if (token === 49) {
+                        var nonNullableType = createNode(264, type.pos);
+                        nonNullableType.type = type;
+                        nextToken();
+                        type = finishNode(nonNullableType);
+                    }
+                    else {
+                        break;
+                    }
+                }
+                return type;
+            }
+            function parseBasicTypeExpression() {
+                switch (token) {
+                    case 37:
+                        return parseJSDocAllType();
+                    case 53:
+                        return parseJSDocUnknownOrNullableType();
+                    case 17:
+                        return parseJSDocUnionType();
+                    case 19:
+                        return parseJSDocTupleType();
+                    case 49:
+                        return parseJSDocNonNullableType();
+                    case 15:
+                        return parseJSDocRecordType();
+                    case 87:
+                        return parseJSDocFunctionType();
+                    case 22:
+                        return parseJSDocVariadicType();
+                    case 92:
+                        return parseJSDocConstructorType();
+                    case 97:
+                        return parseJSDocThisType();
+                    case 117:
+                    case 132:
+                    case 130:
+                    case 120:
+                    case 133:
+                    case 103:
+                        return parseTokenNode();
+                }
+                return parseJSDocTypeReference();
+            }
+            function parseJSDocThisType() {
+                var result = createNode(272);
+                nextToken();
+                parseExpected(54);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocConstructorType() {
+                var result = createNode(271);
+                nextToken();
+                parseExpected(54);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocVariadicType() {
+                var result = createNode(270);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocFunctionType() {
+                var result = createNode(269);
+                nextToken();
+                parseExpected(17);
+                result.parameters = parseDelimitedList(22, parseJSDocParameter);
+                checkForTrailingComma(result.parameters);
+                parseExpected(18);
+                if (token === 54) {
+                    nextToken();
+                    result.type = parseJSDocType();
+                }
+                return finishNode(result);
+            }
+            function parseJSDocParameter() {
+                var parameter = createNode(142);
+                parameter.type = parseJSDocType();
+                if (parseOptional(56)) {
+                    parameter.questionToken = createNode(56);
+                }
+                return finishNode(parameter);
+            }
+            function parseJSDocTypeReference() {
+                var result = createNode(267);
+                result.name = parseSimplePropertyName();
+                if (token === 25) {
+                    result.typeArguments = parseTypeArguments();
+                }
+                else {
+                    while (parseOptional(21)) {
+                        if (token === 25) {
+                            result.typeArguments = parseTypeArguments();
+                            break;
+                        }
+                        else {
+                            result.name = parseQualifiedName(result.name);
+                        }
+                    }
+                }
+                return finishNode(result);
+            }
+            function parseTypeArguments() {
+                nextToken();
+                var typeArguments = parseDelimitedList(23, parseJSDocType);
+                checkForTrailingComma(typeArguments);
+                checkForEmptyTypeArgumentList(typeArguments);
+                parseExpected(27);
+                return typeArguments;
+            }
+            function checkForEmptyTypeArgumentList(typeArguments) {
+                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
+                    var start = typeArguments.pos - "<".length;
+                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
+                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+                }
+            }
+            function parseQualifiedName(left) {
+                var result = createNode(139, left.pos);
+                result.left = left;
+                result.right = parseIdentifierName();
+                return finishNode(result);
+            }
+            function parseJSDocRecordType() {
+                var result = createNode(265);
+                nextToken();
+                result.members = parseDelimitedList(24, parseJSDocRecordMember);
+                checkForTrailingComma(result.members);
+                parseExpected(16);
+                return finishNode(result);
+            }
+            function parseJSDocRecordMember() {
+                var result = createNode(266);
+                result.name = parseSimplePropertyName();
+                if (token === 54) {
+                    nextToken();
+                    result.type = parseJSDocType();
+                }
+                return finishNode(result);
+            }
+            function parseJSDocNonNullableType() {
+                var result = createNode(264);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocTupleType() {
+                var result = createNode(262);
+                nextToken();
+                result.types = parseDelimitedList(25, parseJSDocType);
+                checkForTrailingComma(result.types);
+                parseExpected(20);
+                return finishNode(result);
+            }
+            function checkForTrailingComma(list) {
+                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
+                    var start = list.end - ",".length;
+                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
+                }
+            }
+            function parseJSDocUnionType() {
+                var result = createNode(261);
+                nextToken();
+                result.types = parseJSDocTypeList(parseJSDocType());
+                parseExpected(18);
+                return finishNode(result);
+            }
+            function parseJSDocTypeList(firstType) {
+                ts.Debug.assert(!!firstType);
+                var types = [];
+                types.pos = firstType.pos;
+                types.push(firstType);
+                while (parseOptional(47)) {
+                    types.push(parseJSDocType());
+                }
+                types.end = scanner.getStartPos();
+                return types;
+            }
+            function parseJSDocAllType() {
+                var result = createNode(258);
+                nextToken();
+                return finishNode(result);
+            }
+            function parseJSDocUnknownOrNullableType() {
+                var pos = scanner.getStartPos();
+                nextToken();
+                if (token === 24 ||
+                    token === 16 ||
+                    token === 18 ||
+                    token === 27 ||
+                    token === 56 ||
+                    token === 47) {
+                    var result = createNode(259, pos);
+                    return finishNode(result);
+                }
+                else {
+                    var result = createNode(263, pos);
+                    result.type = parseJSDocType();
+                    return finishNode(result);
+                }
+            }
+            function parseIsolatedJSDocComment(content, start, length) {
+                initializeState("file.js", content, 2, undefined, 1);
+                sourceFile = { languageVariant: 0, text: content };
+                var jsDocComment = parseJSDocCommentWorker(start, length);
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDocComment ? { jsDocComment: jsDocComment, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+            function parseJSDocComment(parent, start, length) {
+                var saveToken = token;
+                var saveParseDiagnosticsLength = parseDiagnostics.length;
+                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+                var comment = parseJSDocCommentWorker(start, length);
+                if (comment) {
+                    comment.parent = parent;
+                }
+                token = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+                return comment;
+            }
+            JSDocParser.parseJSDocComment = parseJSDocComment;
+            function parseJSDocCommentWorker(start, length) {
+                var content = sourceText;
+                start = start || 0;
+                var end = length === undefined ? content.length : start + length;
+                length = end - start;
+                ts.Debug.assert(start >= 0);
+                ts.Debug.assert(start <= end);
+                ts.Debug.assert(end <= content.length);
+                var tags;
+                var result;
+                if (content.charCodeAt(start) === 47 &&
+                    content.charCodeAt(start + 1) === 42 &&
+                    content.charCodeAt(start + 2) === 42 &&
+                    content.charCodeAt(start + 3) !== 42) {
+                    scanner.scanRange(start + 3, length - 5, function () {
+                        var canParseTag = true;
+                        var seenAsterisk = true;
+                        nextJSDocToken();
+                        while (token !== 1) {
+                            switch (token) {
+                                case 55:
+                                    if (canParseTag) {
+                                        parseTag();
+                                    }
+                                    seenAsterisk = false;
+                                    break;
+                                case 4:
+                                    canParseTag = true;
+                                    seenAsterisk = false;
+                                    break;
+                                case 37:
+                                    if (seenAsterisk) {
+                                        canParseTag = false;
+                                    }
+                                    seenAsterisk = true;
+                                    break;
+                                case 69:
+                                    canParseTag = false;
+                                    break;
+                                case 1:
+                                    break;
+                            }
+                            nextJSDocToken();
+                        }
+                        result = createJSDocComment();
+                    });
+                }
+                return result;
+                function createJSDocComment() {
+                    if (!tags) {
+                        return undefined;
+                    }
+                    var result = createNode(273, start);
+                    result.tags = tags;
+                    return finishNode(result, end);
+                }
+                function skipWhitespace() {
+                    while (token === 5 || token === 4) {
+                        nextJSDocToken();
+                    }
+                }
+                function parseTag() {
+                    ts.Debug.assert(token === 55);
+                    var atToken = createNode(55, scanner.getTokenPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    if (!tagName) {
+                        return;
+                    }
+                    var tag = handleTag(atToken, tagName) || handleUnknownTag(atToken, tagName);
+                    addTag(tag);
+                }
+                function handleTag(atToken, tagName) {
+                    if (tagName) {
+                        switch (tagName.text) {
+                            case "param":
+                                return handleParamTag(atToken, tagName);
+                            case "return":
+                            case "returns":
+                                return handleReturnTag(atToken, tagName);
+                            case "template":
+                                return handleTemplateTag(atToken, tagName);
+                            case "type":
+                                return handleTypeTag(atToken, tagName);
+                            case "typedef":
+                                return handleTypedefTag(atToken, tagName);
+                        }
+                    }
+                    return undefined;
+                }
+                function handleUnknownTag(atToken, tagName) {
+                    var result = createNode(274, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    return finishNode(result);
+                }
+                function addTag(tag) {
+                    if (tag) {
+                        if (!tags) {
+                            tags = [];
+                            tags.pos = tag.pos;
+                        }
+                        tags.push(tag);
+                        tags.end = tag.end;
+                    }
+                }
+                function tryParseTypeExpression() {
+                    if (token !== 15) {
+                        return undefined;
+                    }
+                    var typeExpression = parseJSDocTypeExpression();
+                    return typeExpression;
+                }
+                function handleParamTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var name;
+                    var isBracketed;
+                    if (parseOptionalToken(19)) {
+                        name = parseJSDocIdentifierName();
+                        isBracketed = true;
+                        if (parseOptionalToken(56)) {
+                            parseExpression();
+                        }
+                        parseExpected(20);
+                    }
+                    else if (ts.tokenIsIdentifierOrKeyword(token)) {
+                        name = parseJSDocIdentifierName();
+                    }
+                    if (!name) {
+                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var preName, postName;
+                    if (typeExpression) {
+                        postName = name;
+                    }
+                    else {
+                        preName = name;
+                    }
+                    if (!typeExpression) {
+                        typeExpression = tryParseTypeExpression();
+                    }
+                    var result = createNode(275, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.preParameterName = preName;
+                    result.typeExpression = typeExpression;
+                    result.postParameterName = postName;
+                    result.isBracketed = isBracketed;
+                    return finishNode(result);
+                }
+                function handleReturnTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 276; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(276, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function handleTypeTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 277; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(277, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function handlePropertyTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var name = parseJSDocIdentifierName();
+                    if (!name) {
+                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var result = createNode(280, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.name = name;
+                    result.typeExpression = typeExpression;
+                    return finishNode(result);
+                }
+                function handleTypedefTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var typedefTag = createNode(279, atToken.pos);
+                    typedefTag.atToken = atToken;
+                    typedefTag.tagName = tagName;
+                    typedefTag.name = parseJSDocIdentifierName();
+                    typedefTag.typeExpression = typeExpression;
+                    if (typeExpression) {
+                        if (typeExpression.type.kind === 267) {
+                            var jsDocTypeReference = typeExpression.type;
+                            if (jsDocTypeReference.name.kind === 69) {
+                                var name_8 = jsDocTypeReference.name;
+                                if (name_8.text === "Object") {
+                                    typedefTag.jsDocTypeLiteral = scanChildTags();
+                                }
+                            }
+                        }
+                        if (!typedefTag.jsDocTypeLiteral) {
+                            typedefTag.jsDocTypeLiteral = typeExpression.type;
+                        }
+                    }
+                    else {
+                        typedefTag.jsDocTypeLiteral = scanChildTags();
+                    }
+                    return finishNode(typedefTag);
+                    function scanChildTags() {
+                        var jsDocTypeLiteral = createNode(281, scanner.getStartPos());
+                        var resumePos = scanner.getStartPos();
+                        var canParseTag = true;
+                        var seenAsterisk = false;
+                        var parentTagTerminated = false;
+                        while (token !== 1 && !parentTagTerminated) {
+                            nextJSDocToken();
+                            switch (token) {
+                                case 55:
+                                    if (canParseTag) {
+                                        parentTagTerminated = !tryParseChildTag(jsDocTypeLiteral);
+                                    }
+                                    seenAsterisk = false;
+                                    break;
+                                case 4:
+                                    resumePos = scanner.getStartPos() - 1;
+                                    canParseTag = true;
+                                    seenAsterisk = false;
+                                    break;
+                                case 37:
+                                    if (seenAsterisk) {
+                                        canParseTag = false;
+                                    }
+                                    seenAsterisk = true;
+                                    break;
+                                case 69:
+                                    canParseTag = false;
+                                case 1:
+                                    break;
+                            }
+                        }
+                        scanner.setTextPos(resumePos);
+                        return finishNode(jsDocTypeLiteral);
+                    }
+                }
+                function tryParseChildTag(parentTag) {
+                    ts.Debug.assert(token === 55);
+                    var atToken = createNode(55, scanner.getStartPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    if (!tagName) {
+                        return false;
+                    }
+                    switch (tagName.text) {
+                        case "type":
+                            if (parentTag.jsDocTypeTag) {
+                                return false;
+                            }
+                            parentTag.jsDocTypeTag = handleTypeTag(atToken, tagName);
+                            return true;
+                        case "prop":
+                        case "property":
+                            if (!parentTag.jsDocPropertyTags) {
+                                parentTag.jsDocPropertyTags = [];
+                            }
+                            var propertyTag = handlePropertyTag(atToken, tagName);
+                            parentTag.jsDocPropertyTags.push(propertyTag);
+                            return true;
+                    }
+                    return false;
+                }
+                function handleTemplateTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 278; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var typeParameters = [];
+                    typeParameters.pos = scanner.getStartPos();
+                    while (true) {
+                        var name_9 = parseJSDocIdentifierName();
+                        if (!name_9) {
+                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                            return undefined;
+                        }
+                        var typeParameter = createNode(141, name_9.pos);
+                        typeParameter.name = name_9;
+                        finishNode(typeParameter);
+                        typeParameters.push(typeParameter);
+                        if (token === 24) {
+                            nextJSDocToken();
+                        }
+                        else {
+                            break;
+                        }
+                    }
+                    var result = createNode(278, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeParameters = typeParameters;
+                    finishNode(result);
+                    typeParameters.end = result.end;
+                    return result;
+                }
+                function nextJSDocToken() {
+                    return token = scanner.scanJSDocToken();
+                }
+                function parseJSDocIdentifierName() {
+                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token));
+                }
+                function createJSDocIdentifier(isIdentifier) {
+                    if (!isIdentifier) {
+                        parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var pos = scanner.getTokenPos();
+                    var end = scanner.getTextPos();
+                    var result = createNode(69, pos);
+                    result.text = content.substring(pos, end);
+                    finishNode(result, end);
+                    nextJSDocToken();
+                    return result;
+                }
+            }
+            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
+        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
+    })(Parser || (Parser = {}));
+    var IncrementalParser;
+    (function (IncrementalParser) {
+        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2);
+            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
+            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
+                return sourceFile;
+            }
+            if (sourceFile.statements.length === 0) {
+                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, undefined, true, sourceFile.scriptKind);
+            }
+            var incrementalSourceFile = sourceFile;
+            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
+            incrementalSourceFile.hasBeenIncrementallyParsed = true;
+            var oldText = sourceFile.text;
+            var syntaxCursor = createSyntaxCursor(sourceFile);
+            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
+            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
+            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
+            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
+            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
+            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
+            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
+            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, true, sourceFile.scriptKind);
+            return result;
+        }
+        IncrementalParser.updateSourceFile = updateSourceFile;
+        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
+            if (isArray) {
+                visitArray(element);
+            }
+            else {
+                visitNode(element);
+            }
+            return;
+            function visitNode(node) {
+                var text = "";
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    text = oldText.substring(node.pos, node.end);
+                }
+                if (node._children) {
+                    node._children = undefined;
+                }
+                node.pos += delta;
+                node.end += delta;
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
+                }
+                forEachChild(node, visitNode, visitArray);
+                if (node.jsDocComments) {
+                    for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        forEachChild(jsDocComment, visitNode, visitArray);
+                    }
+                }
+                checkNodePositions(node, aggressiveChecks);
+            }
+            function visitArray(array) {
+                array._children = undefined;
+                array.pos += delta;
+                array.end += delta;
+                for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
+                    var node = array_7[_i];
+                    visitNode(node);
+                }
+            }
+        }
+        function shouldCheckNode(node) {
+            switch (node.kind) {
+                case 9:
+                case 8:
+                case 69:
+                    return true;
+            }
+            return false;
+        }
+        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
+            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
+            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
+            ts.Debug.assert(element.pos <= element.end);
+            element.pos = Math.min(element.pos, changeRangeNewEnd);
+            if (element.end >= changeRangeOldEnd) {
+                element.end += delta;
+            }
+            else {
+                element.end = Math.min(element.end, changeRangeNewEnd);
+            }
+            ts.Debug.assert(element.pos <= element.end);
+            if (element.parent) {
+                ts.Debug.assert(element.pos >= element.parent.pos);
+                ts.Debug.assert(element.end <= element.parent.end);
+            }
+        }
+        function checkNodePositions(node, aggressiveChecks) {
+            if (aggressiveChecks) {
+                var pos_2 = node.pos;
+                forEachChild(node, function (child) {
+                    ts.Debug.assert(child.pos >= pos_2);
+                    pos_2 = child.end;
+                });
+                ts.Debug.assert(pos_2 <= node.end);
+            }
+        }
+        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
+            visitNode(sourceFile);
+            return;
+            function visitNode(child) {
+                ts.Debug.assert(child.pos <= child.end);
+                if (child.pos > changeRangeOldEnd) {
+                    moveElementEntirelyPastChangeRange(child, false, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                var fullEnd = child.end;
+                if (fullEnd >= changeStart) {
+                    child.intersectsChange = true;
+                    child._children = undefined;
+                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    forEachChild(child, visitNode, visitArray);
+                    checkNodePositions(child, aggressiveChecks);
+                    return;
+                }
+                ts.Debug.assert(fullEnd < changeStart);
+            }
+            function visitArray(array) {
+                ts.Debug.assert(array.pos <= array.end);
+                if (array.pos > changeRangeOldEnd) {
+                    moveElementEntirelyPastChangeRange(array, true, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                var fullEnd = array.end;
+                if (fullEnd >= changeStart) {
+                    array.intersectsChange = true;
+                    array._children = undefined;
+                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
+                        var node = array_8[_i];
+                        visitNode(node);
+                    }
+                    return;
+                }
+                ts.Debug.assert(fullEnd < changeStart);
+            }
+        }
+        function extendToAffectedRange(sourceFile, changeRange) {
+            var maxLookahead = 1;
+            var start = changeRange.span.start;
+            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
+                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
+                ts.Debug.assert(nearestNode.pos <= start);
+                var position = nearestNode.pos;
+                start = Math.max(0, position - 1);
+            }
+            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
+            var finalLength = changeRange.newLength + (changeRange.span.start - start);
+            return ts.createTextChangeRange(finalSpan, finalLength);
+        }
+        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
+            var bestResult = sourceFile;
+            var lastNodeEntirelyBeforePosition;
+            forEachChild(sourceFile, visit);
+            if (lastNodeEntirelyBeforePosition) {
+                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
+                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
+                    bestResult = lastChildOfLastEntireNodeBeforePosition;
+                }
+            }
+            return bestResult;
+            function getLastChild(node) {
+                while (true) {
+                    var lastChild = getLastChildWorker(node);
+                    if (lastChild) {
+                        node = lastChild;
+                    }
+                    else {
+                        return node;
+                    }
+                }
+            }
+            function getLastChildWorker(node) {
+                var last = undefined;
+                forEachChild(node, function (child) {
+                    if (ts.nodeIsPresent(child)) {
+                        last = child;
+                    }
+                });
+                return last;
+            }
+            function visit(child) {
+                if (ts.nodeIsMissing(child)) {
+                    return;
+                }
+                if (child.pos <= position) {
+                    if (child.pos >= bestResult.pos) {
+                        bestResult = child;
+                    }
+                    if (position < child.end) {
+                        forEachChild(child, visit);
+                        return true;
+                    }
+                    else {
+                        ts.Debug.assert(child.end <= position);
+                        lastNodeEntirelyBeforePosition = child;
+                    }
+                }
+                else {
+                    ts.Debug.assert(child.pos > position);
+                    return true;
+                }
+            }
+        }
+        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            var oldText = sourceFile.text;
+            if (textChangeRange) {
+                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
+                if (aggressiveChecks || ts.Debug.shouldAssert(3)) {
+                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
+                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
+                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
+                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
+                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
+                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
+                }
+            }
+        }
+        function createSyntaxCursor(sourceFile) {
+            var currentArray = sourceFile.statements;
+            var currentArrayIndex = 0;
+            ts.Debug.assert(currentArrayIndex < currentArray.length);
+            var current = currentArray[currentArrayIndex];
+            var lastQueriedPosition = -1;
+            return {
+                currentNode: function (position) {
+                    if (position !== lastQueriedPosition) {
+                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
+                            currentArrayIndex++;
+                            current = currentArray[currentArrayIndex];
+                        }
+                        if (!current || current.pos !== position) {
+                            findHighestListElementThatStartsAtPosition(position);
+                        }
+                    }
+                    lastQueriedPosition = position;
+                    ts.Debug.assert(!current || current.pos === position);
+                    return current;
+                }
+            };
+            function findHighestListElementThatStartsAtPosition(position) {
+                currentArray = undefined;
+                currentArrayIndex = -1;
+                current = undefined;
+                forEachChild(sourceFile, visitNode, visitArray);
+                return;
+                function visitNode(node) {
+                    if (position >= node.pos && position < node.end) {
+                        forEachChild(node, visitNode, visitArray);
+                        return true;
+                    }
+                    return false;
+                }
+                function visitArray(array) {
+                    if (position >= array.pos && position < array.end) {
+                        for (var i = 0, n = array.length; i < n; i++) {
+                            var child = array[i];
+                            if (child) {
+                                if (child.pos === position) {
+                                    currentArray = array;
+                                    currentArrayIndex = i;
+                                    current = child;
+                                    return true;
+                                }
+                                else {
+                                    if (child.pos < position && position < child.end) {
+                                        forEachChild(child, visitNode, visitArray);
+                                        return true;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                    return false;
+                }
+            }
+        }
+    })(IncrementalParser || (IncrementalParser = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.bindTime = 0;
+    function getModuleInstanceState(node) {
+        if (node.kind === 222 || node.kind === 223) {
+            return 0;
+        }
+        else if (ts.isConstEnumDeclaration(node)) {
+            return 2;
+        }
+        else if ((node.kind === 230 || node.kind === 229) && !(node.flags & 1)) {
+            return 0;
+        }
+        else if (node.kind === 226) {
+            var state_1 = 0;
+            ts.forEachChild(node, function (n) {
+                switch (getModuleInstanceState(n)) {
+                    case 0:
+                        return false;
+                    case 2:
+                        state_1 = 2;
+                        return false;
+                    case 1:
+                        state_1 = 1;
+                        return true;
+                }
+            });
+            return state_1;
+        }
+        else if (node.kind === 225) {
+            return getModuleInstanceState(node.body);
+        }
+        else {
+            return 1;
+        }
+    }
+    ts.getModuleInstanceState = getModuleInstanceState;
+    var binder = createBinder();
+    function bindSourceFile(file, options) {
+        var start = new Date().getTime();
+        binder(file, options);
+        ts.bindTime += new Date().getTime() - start;
+    }
+    ts.bindSourceFile = bindSourceFile;
+    function createBinder() {
+        var file;
+        var options;
+        var languageVersion;
+        var parent;
+        var container;
+        var blockScopeContainer;
+        var lastContainer;
+        var seenThisKeyword;
+        var currentFlow;
+        var currentBreakTarget;
+        var currentContinueTarget;
+        var currentReturnTarget;
+        var currentTrueTarget;
+        var currentFalseTarget;
+        var preSwitchCaseFlow;
+        var activeLabels;
+        var hasExplicitReturn;
+        var emitFlags;
+        var inStrictMode;
+        var symbolCount = 0;
+        var Symbol;
+        var classifiableNames;
+        var unreachableFlow = { flags: 1 };
+        var reportedUnreachableFlow = { flags: 1 };
+        function bindSourceFile(f, opts) {
+            file = f;
+            options = opts;
+            languageVersion = ts.getEmitScriptTarget(options);
+            inStrictMode = !!file.externalModuleIndicator;
+            classifiableNames = {};
+            symbolCount = 0;
+            Symbol = ts.objectAllocator.getSymbolConstructor();
+            if (!file.locals) {
+                bind(file);
+                file.symbolCount = symbolCount;
+                file.classifiableNames = classifiableNames;
+            }
+            file = undefined;
+            options = undefined;
+            languageVersion = undefined;
+            parent = undefined;
+            container = undefined;
+            blockScopeContainer = undefined;
+            lastContainer = undefined;
+            seenThisKeyword = false;
+            currentFlow = undefined;
+            currentBreakTarget = undefined;
+            currentContinueTarget = undefined;
+            currentReturnTarget = undefined;
+            currentTrueTarget = undefined;
+            currentFalseTarget = undefined;
+            activeLabels = undefined;
+            hasExplicitReturn = false;
+            emitFlags = 0;
+        }
+        return bindSourceFile;
+        function createSymbol(flags, name) {
+            symbolCount++;
+            return new Symbol(flags, name);
+        }
+        function addDeclarationToSymbol(symbol, node, symbolFlags) {
+            symbol.flags |= symbolFlags;
+            node.symbol = symbol;
+            if (!symbol.declarations) {
+                symbol.declarations = [];
+            }
+            symbol.declarations.push(node);
+            if (symbolFlags & 1952 && !symbol.exports) {
+                symbol.exports = {};
+            }
+            if (symbolFlags & 6240 && !symbol.members) {
+                symbol.members = {};
+            }
+            if (symbolFlags & 107455) {
+                var valueDeclaration = symbol.valueDeclaration;
+                if (!valueDeclaration ||
+                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 225)) {
+                    symbol.valueDeclaration = node;
+                }
+            }
+        }
+        function getDeclarationName(node) {
+            if (node.name) {
+                if (ts.isAmbientModule(node)) {
+                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
+                }
+                if (node.name.kind === 140) {
+                    var nameExpression = node.name.expression;
+                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
+                        return nameExpression.text;
+                    }
+                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
+                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
+                }
+                return node.name.text;
+            }
+            switch (node.kind) {
+                case 148:
+                    return "__constructor";
+                case 156:
+                case 151:
+                    return "__call";
+                case 157:
+                case 152:
+                    return "__new";
+                case 153:
+                    return "__index";
+                case 236:
+                    return "__export";
+                case 235:
+                    return node.isExportEquals ? "export=" : "default";
+                case 187:
+                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
+                        case 2:
+                            return "export=";
+                        case 1:
+                        case 4:
+                            return node.left.name.text;
+                        case 3:
+                            return node.left.expression.name.text;
+                    }
+                    ts.Debug.fail("Unknown binary declaration kind");
+                    break;
+                case 220:
+                case 221:
+                    return node.flags & 512 ? "default" : undefined;
+                case 269:
+                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
+                case 142:
+                    ts.Debug.assert(node.parent.kind === 269);
+                    var functionType = node.parent;
+                    var index = ts.indexOf(functionType.parameters, node);
+                    return "p" + index;
+                case 279:
+                    var parentNode = node.parent && node.parent.parent;
+                    var nameFromParentNode = void 0;
+                    if (parentNode && parentNode.kind === 200) {
+                        if (parentNode.declarationList.declarations.length > 0) {
+                            var nameIdentifier = parentNode.declarationList.declarations[0].name;
+                            if (nameIdentifier.kind === 69) {
+                                nameFromParentNode = nameIdentifier.text;
+                            }
+                        }
+                    }
+                    return nameFromParentNode;
+            }
+        }
+        function getDisplayName(node) {
+            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
+        }
+        function declareSymbol(symbolTable, parent, node, includes, excludes) {
+            ts.Debug.assert(!ts.hasDynamicName(node));
+            var isDefaultExport = node.flags & 512;
+            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
+            var symbol;
+            if (name !== undefined) {
+                symbol = ts.hasProperty(symbolTable, name)
+                    ? symbolTable[name]
+                    : (symbolTable[name] = createSymbol(0, name));
+                if (name && (includes & 788448)) {
+                    classifiableNames[name] = name;
+                }
+                if (symbol.flags & excludes) {
+                    if (node.name) {
+                        node.name.parent = node;
+                    }
+                    var message_1 = symbol.flags & 2
+                        ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
+                        : ts.Diagnostics.Duplicate_identifier_0;
+                    ts.forEach(symbol.declarations, function (declaration) {
+                        if (declaration.flags & 512) {
+                            message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
+                        }
+                    });
+                    ts.forEach(symbol.declarations, function (declaration) {
+                        file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
+                    });
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
+                    symbol = createSymbol(0, name);
+                }
+            }
+            else {
+                symbol = createSymbol(0, "__missing");
+            }
+            addDeclarationToSymbol(symbol, node, includes);
+            symbol.parent = parent;
+            return symbol;
+        }
+        function declareModuleMember(node, symbolFlags, symbolExcludes) {
+            var hasExportModifier = ts.getCombinedNodeFlags(node) & 1;
+            if (symbolFlags & 8388608) {
+                if (node.kind === 238 || (node.kind === 229 && hasExportModifier)) {
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                }
+                else {
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                }
+            }
+            else {
+                if (!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 8192)) {
+                    var exportKind = (symbolFlags & 107455 ? 1048576 : 0) |
+                        (symbolFlags & 793056 ? 2097152 : 0) |
+                        (symbolFlags & 1536 ? 4194304 : 0);
+                    var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
+                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                    node.localSymbol = local;
+                    return local;
+                }
+                else {
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                }
+            }
+        }
+        function bindContainer(node, containerFlags) {
+            var saveContainer = container;
+            var savedBlockScopeContainer = blockScopeContainer;
+            if (containerFlags & 1) {
+                container = blockScopeContainer = node;
+                if (containerFlags & 32) {
+                    container.locals = {};
+                }
+                addToContainerChain(container);
+            }
+            else if (containerFlags & 2) {
+                blockScopeContainer = node;
+                blockScopeContainer.locals = undefined;
+            }
+            if (containerFlags & 4) {
+                var saveCurrentFlow = currentFlow;
+                var saveBreakTarget = currentBreakTarget;
+                var saveContinueTarget = currentContinueTarget;
+                var saveReturnTarget = currentReturnTarget;
+                var saveActiveLabels = activeLabels;
+                var saveHasExplicitReturn = hasExplicitReturn;
+                var isIIFE = containerFlags & 16 && !!ts.getImmediatelyInvokedFunctionExpression(node);
+                if (isIIFE) {
+                    currentReturnTarget = createBranchLabel();
+                }
+                else {
+                    currentFlow = { flags: 2 };
+                    if (containerFlags & 16) {
+                        currentFlow.container = node;
+                    }
+                    currentReturnTarget = undefined;
+                }
+                currentBreakTarget = undefined;
+                currentContinueTarget = undefined;
+                activeLabels = undefined;
+                hasExplicitReturn = false;
+                bindChildren(node);
+                node.flags &= ~4030464;
+                if (!(currentFlow.flags & 1) && containerFlags & 8 && ts.nodeIsPresent(node.body)) {
+                    node.flags |= 32768;
+                    if (hasExplicitReturn)
+                        node.flags |= 65536;
+                }
+                if (node.kind === 256) {
+                    node.flags |= emitFlags;
+                }
+                if (isIIFE) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                    currentFlow = finishFlowLabel(currentReturnTarget);
+                }
+                else {
+                    currentFlow = saveCurrentFlow;
+                }
+                currentBreakTarget = saveBreakTarget;
+                currentContinueTarget = saveContinueTarget;
+                currentReturnTarget = saveReturnTarget;
+                activeLabels = saveActiveLabels;
+                hasExplicitReturn = saveHasExplicitReturn;
+            }
+            else if (containerFlags & 64) {
+                seenThisKeyword = false;
+                bindChildren(node);
+                node.flags = seenThisKeyword ? node.flags | 16384 : node.flags & ~16384;
+            }
+            else {
+                bindChildren(node);
+            }
+            container = saveContainer;
+            blockScopeContainer = savedBlockScopeContainer;
+        }
+        function bindChildren(node) {
+            if (ts.isInJavaScriptFile(node) && node.jsDocComments) {
+                for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                    var jsDocComment = _a[_i];
+                    bind(jsDocComment);
+                }
+            }
+            if (checkUnreachable(node)) {
+                ts.forEachChild(node, bind);
+                return;
+            }
+            switch (node.kind) {
+                case 205:
+                    bindWhileStatement(node);
+                    break;
+                case 204:
+                    bindDoStatement(node);
+                    break;
+                case 206:
+                    bindForStatement(node);
+                    break;
+                case 207:
+                case 208:
+                    bindForInOrForOfStatement(node);
+                    break;
+                case 203:
+                    bindIfStatement(node);
+                    break;
+                case 211:
+                case 215:
+                    bindReturnOrThrow(node);
+                    break;
+                case 210:
+                case 209:
+                    bindBreakOrContinueStatement(node);
+                    break;
+                case 216:
+                    bindTryStatement(node);
+                    break;
+                case 213:
+                    bindSwitchStatement(node);
+                    break;
+                case 227:
+                    bindCaseBlock(node);
+                    break;
+                case 214:
+                    bindLabeledStatement(node);
+                    break;
+                case 185:
+                    bindPrefixUnaryExpressionFlow(node);
+                    break;
+                case 187:
+                    bindBinaryExpressionFlow(node);
+                    break;
+                case 181:
+                    bindDeleteExpressionFlow(node);
+                    break;
+                case 188:
+                    bindConditionalExpressionFlow(node);
+                    break;
+                case 218:
+                    bindVariableDeclarationFlow(node);
+                    break;
+                case 174:
+                    bindCallExpressionFlow(node);
+                    break;
+                default:
+                    ts.forEachChild(node, bind);
+                    break;
+            }
+        }
+        function isNarrowableReference(expr) {
+            return expr.kind === 69 ||
+                expr.kind === 97 ||
+                expr.kind === 172 && isNarrowableReference(expr.expression);
+        }
+        function isNarrowingExpression(expr) {
+            switch (expr.kind) {
+                case 69:
+                case 97:
+                case 172:
+                    return isNarrowableReference(expr);
+                case 174:
+                    return true;
+                case 178:
+                    return isNarrowingExpression(expr.expression);
+                case 187:
+                    return isNarrowingBinaryExpression(expr);
+                case 185:
+                    return expr.operator === 49 && isNarrowingExpression(expr.operand);
+            }
+            return false;
+        }
+        function isNarrowingBinaryExpression(expr) {
+            switch (expr.operatorToken.kind) {
+                case 56:
+                    return isNarrowableReference(expr.left);
+                case 30:
+                case 31:
+                case 32:
+                case 33:
+                    if (isNarrowingExpression(expr.left) && (expr.right.kind === 93 || expr.right.kind === 69)) {
+                        return true;
+                    }
+                    if (expr.left.kind === 182 && isNarrowingExpression(expr.left.expression) && expr.right.kind === 9) {
+                        return true;
+                    }
+                    return false;
+                case 91:
+                    return isNarrowingExpression(expr.left);
+                case 24:
+                    return isNarrowingExpression(expr.right);
+            }
+            return false;
+        }
+        function createBranchLabel() {
+            return {
+                flags: 4,
+                antecedents: undefined
+            };
+        }
+        function createLoopLabel() {
+            return {
+                flags: 8,
+                antecedents: undefined
+            };
+        }
+        function setFlowNodeReferenced(flow) {
+            flow.flags |= flow.flags & 128 ? 256 : 128;
+        }
+        function addAntecedent(label, antecedent) {
+            if (!(antecedent.flags & 1) && !ts.contains(label.antecedents, antecedent)) {
+                (label.antecedents || (label.antecedents = [])).push(antecedent);
+                setFlowNodeReferenced(antecedent);
+            }
+        }
+        function createFlowCondition(flags, antecedent, expression) {
+            if (antecedent.flags & 1) {
+                return antecedent;
+            }
+            if (!expression) {
+                return flags & 32 ? antecedent : unreachableFlow;
+            }
+            if (expression.kind === 99 && flags & 64 ||
+                expression.kind === 84 && flags & 32) {
+                return unreachableFlow;
+            }
+            if (!isNarrowingExpression(expression)) {
+                return antecedent;
+            }
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: flags,
+                antecedent: antecedent,
+                expression: expression
+            };
+        }
+        function createFlowAssignment(antecedent, node) {
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: 16,
+                antecedent: antecedent,
+                node: node
+            };
+        }
+        function finishFlowLabel(flow) {
+            var antecedents = flow.antecedents;
+            if (!antecedents) {
+                return unreachableFlow;
+            }
+            if (antecedents.length === 1) {
+                return antecedents[0];
+            }
+            return flow;
+        }
+        function isStatementCondition(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 203:
+                case 205:
+                case 204:
+                    return parent.expression === node;
+                case 206:
+                case 188:
+                    return parent.condition === node;
+            }
+            return false;
+        }
+        function isLogicalExpression(node) {
+            while (true) {
+                if (node.kind === 178) {
+                    node = node.expression;
+                }
+                else if (node.kind === 185 && node.operator === 49) {
+                    node = node.operand;
+                }
+                else {
+                    return node.kind === 187 && (node.operatorToken.kind === 51 ||
+                        node.operatorToken.kind === 52);
+                }
+            }
+        }
+        function isTopLevelLogicalExpression(node) {
+            while (node.parent.kind === 178 ||
+                node.parent.kind === 185 &&
+                    node.parent.operator === 49) {
+                node = node.parent;
+            }
+            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
+        }
+        function bindCondition(node, trueTarget, falseTarget) {
+            var saveTrueTarget = currentTrueTarget;
+            var saveFalseTarget = currentFalseTarget;
+            currentTrueTarget = trueTarget;
+            currentFalseTarget = falseTarget;
+            bind(node);
+            currentTrueTarget = saveTrueTarget;
+            currentFalseTarget = saveFalseTarget;
+            if (!node || !isLogicalExpression(node)) {
+                addAntecedent(trueTarget, createFlowCondition(32, currentFlow, node));
+                addAntecedent(falseTarget, createFlowCondition(64, currentFlow, node));
+            }
+        }
+        function bindIterativeStatement(node, breakTarget, continueTarget) {
+            var saveBreakTarget = currentBreakTarget;
+            var saveContinueTarget = currentContinueTarget;
+            currentBreakTarget = breakTarget;
+            currentContinueTarget = continueTarget;
+            bind(node);
+            currentBreakTarget = saveBreakTarget;
+            currentContinueTarget = saveContinueTarget;
+        }
+        function bindWhileStatement(node) {
+            var preWhileLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postWhileLabel = createBranchLabel();
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = preWhileLabel;
+            bindCondition(node.expression, preBodyLabel, postWhileLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = finishFlowLabel(postWhileLabel);
+        }
+        function bindDoStatement(node) {
+            var preDoLabel = createLoopLabel();
+            var preConditionLabel = createBranchLabel();
+            var postDoLabel = createBranchLabel();
+            addAntecedent(preDoLabel, currentFlow);
+            currentFlow = preDoLabel;
+            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
+            addAntecedent(preConditionLabel, currentFlow);
+            currentFlow = finishFlowLabel(preConditionLabel);
+            bindCondition(node.expression, preDoLabel, postDoLabel);
+            currentFlow = finishFlowLabel(postDoLabel);
+        }
+        function bindForStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postLoopLabel = createBranchLabel();
+            bind(node.initializer);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            bindCondition(node.condition, preBodyLabel, postLoopLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            bind(node.incrementor);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
+        }
+        function bindForInOrForOfStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var postLoopLabel = createBranchLabel();
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            bind(node.expression);
+            addAntecedent(postLoopLabel, currentFlow);
+            bind(node.initializer);
+            if (node.initializer.kind !== 219) {
+                bindAssignmentTargetFlow(node.initializer);
+            }
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
+        }
+        function bindIfStatement(node) {
+            var thenLabel = createBranchLabel();
+            var elseLabel = createBranchLabel();
+            var postIfLabel = createBranchLabel();
+            bindCondition(node.expression, thenLabel, elseLabel);
+            currentFlow = finishFlowLabel(thenLabel);
+            bind(node.thenStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(elseLabel);
+            bind(node.elseStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(postIfLabel);
+        }
+        function bindReturnOrThrow(node) {
+            bind(node.expression);
+            if (node.kind === 211) {
+                hasExplicitReturn = true;
+                if (currentReturnTarget) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                }
+            }
+            currentFlow = unreachableFlow;
+        }
+        function findActiveLabel(name) {
+            if (activeLabels) {
+                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
+                    var label = activeLabels_1[_i];
+                    if (label.name === name) {
+                        return label;
+                    }
+                }
+            }
+            return undefined;
+        }
+        function bindbreakOrContinueFlow(node, breakTarget, continueTarget) {
+            var flowLabel = node.kind === 210 ? breakTarget : continueTarget;
+            if (flowLabel) {
+                addAntecedent(flowLabel, currentFlow);
+                currentFlow = unreachableFlow;
+            }
+        }
+        function bindBreakOrContinueStatement(node) {
+            bind(node.label);
+            if (node.label) {
+                var activeLabel = findActiveLabel(node.label.text);
+                if (activeLabel) {
+                    activeLabel.referenced = true;
+                    bindbreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
+                }
+            }
+            else {
+                bindbreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
+            }
+        }
+        function bindTryStatement(node) {
+            var postFinallyLabel = createBranchLabel();
+            var preTryFlow = currentFlow;
+            bind(node.tryBlock);
+            addAntecedent(postFinallyLabel, currentFlow);
+            if (node.catchClause) {
+                currentFlow = preTryFlow;
+                bind(node.catchClause);
+                addAntecedent(postFinallyLabel, currentFlow);
+            }
+            if (node.finallyBlock) {
+                currentFlow = preTryFlow;
+                bind(node.finallyBlock);
+            }
+            currentFlow = finishFlowLabel(postFinallyLabel);
+        }
+        function bindSwitchStatement(node) {
+            var postSwitchLabel = createBranchLabel();
+            bind(node.expression);
+            var saveBreakTarget = currentBreakTarget;
+            var savePreSwitchCaseFlow = preSwitchCaseFlow;
+            currentBreakTarget = postSwitchLabel;
+            preSwitchCaseFlow = currentFlow;
+            bind(node.caseBlock);
+            addAntecedent(postSwitchLabel, currentFlow);
+            var hasNonEmptyDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 250 && c.statements.length; });
+            if (!hasNonEmptyDefault) {
+                addAntecedent(postSwitchLabel, preSwitchCaseFlow);
+            }
+            currentBreakTarget = saveBreakTarget;
+            preSwitchCaseFlow = savePreSwitchCaseFlow;
+            currentFlow = finishFlowLabel(postSwitchLabel);
+        }
+        function bindCaseBlock(node) {
+            var clauses = node.clauses;
+            for (var i = 0; i < clauses.length; i++) {
+                var clause = clauses[i];
+                if (clause.statements.length) {
+                    if (currentFlow.flags & 1) {
+                        currentFlow = preSwitchCaseFlow;
+                    }
+                    else {
+                        var preCaseLabel = createBranchLabel();
+                        addAntecedent(preCaseLabel, preSwitchCaseFlow);
+                        addAntecedent(preCaseLabel, currentFlow);
+                        currentFlow = finishFlowLabel(preCaseLabel);
+                    }
+                    bind(clause);
+                    if (!(currentFlow.flags & 1) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
+                        errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
+                    }
+                }
+                else {
+                    bind(clause);
+                }
+            }
+        }
+        function pushActiveLabel(name, breakTarget, continueTarget) {
+            var activeLabel = {
+                name: name,
+                breakTarget: breakTarget,
+                continueTarget: continueTarget,
+                referenced: false
+            };
+            (activeLabels || (activeLabels = [])).push(activeLabel);
+            return activeLabel;
+        }
+        function popActiveLabel() {
+            activeLabels.pop();
+        }
+        function bindLabeledStatement(node) {
+            var preStatementLabel = createLoopLabel();
+            var postStatementLabel = createBranchLabel();
+            bind(node.label);
+            addAntecedent(preStatementLabel, currentFlow);
+            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
+            bind(node.statement);
+            popActiveLabel();
+            if (!activeLabel.referenced && !options.allowUnusedLabels) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
+            }
+            addAntecedent(postStatementLabel, currentFlow);
+            currentFlow = finishFlowLabel(postStatementLabel);
+        }
+        function bindDestructuringTargetFlow(node) {
+            if (node.kind === 187 && node.operatorToken.kind === 56) {
+                bindAssignmentTargetFlow(node.left);
+            }
+            else {
+                bindAssignmentTargetFlow(node);
+            }
+        }
+        function bindAssignmentTargetFlow(node) {
+            if (isNarrowableReference(node)) {
+                currentFlow = createFlowAssignment(currentFlow, node);
+            }
+            else if (node.kind === 170) {
+                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
+                    var e = _a[_i];
+                    if (e.kind === 191) {
+                        bindAssignmentTargetFlow(e.expression);
+                    }
+                    else {
+                        bindDestructuringTargetFlow(e);
+                    }
+                }
+            }
+            else if (node.kind === 171) {
+                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
+                    var p = _c[_b];
+                    if (p.kind === 253) {
+                        bindDestructuringTargetFlow(p.initializer);
+                    }
+                    else if (p.kind === 254) {
+                        bindAssignmentTargetFlow(p.name);
+                    }
+                }
+            }
+        }
+        function bindLogicalExpression(node, trueTarget, falseTarget) {
+            var preRightLabel = createBranchLabel();
+            if (node.operatorToken.kind === 51) {
+                bindCondition(node.left, preRightLabel, falseTarget);
+            }
+            else {
+                bindCondition(node.left, trueTarget, preRightLabel);
+            }
+            currentFlow = finishFlowLabel(preRightLabel);
+            bind(node.operatorToken);
+            bindCondition(node.right, trueTarget, falseTarget);
+        }
+        function bindPrefixUnaryExpressionFlow(node) {
+            if (node.operator === 49) {
+                var saveTrueTarget = currentTrueTarget;
+                currentTrueTarget = currentFalseTarget;
+                currentFalseTarget = saveTrueTarget;
+                ts.forEachChild(node, bind);
+                currentFalseTarget = currentTrueTarget;
+                currentTrueTarget = saveTrueTarget;
+            }
+            else {
+                ts.forEachChild(node, bind);
+            }
+        }
+        function bindBinaryExpressionFlow(node) {
+            var operator = node.operatorToken.kind;
+            if (operator === 51 || operator === 52) {
+                if (isTopLevelLogicalExpression(node)) {
+                    var postExpressionLabel = createBranchLabel();
+                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
+                    currentFlow = finishFlowLabel(postExpressionLabel);
+                }
+                else {
+                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
+                }
+            }
+            else {
+                ts.forEachChild(node, bind);
+                if (operator === 56 && !ts.isAssignmentTarget(node)) {
+                    bindAssignmentTargetFlow(node.left);
+                }
+            }
+        }
+        function bindDeleteExpressionFlow(node) {
+            ts.forEachChild(node, bind);
+            if (node.expression.kind === 172) {
+                bindAssignmentTargetFlow(node.expression);
+            }
+        }
+        function bindConditionalExpressionFlow(node) {
+            var trueLabel = createBranchLabel();
+            var falseLabel = createBranchLabel();
+            var postExpressionLabel = createBranchLabel();
+            bindCondition(node.condition, trueLabel, falseLabel);
+            currentFlow = finishFlowLabel(trueLabel);
+            bind(node.whenTrue);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(falseLabel);
+            bind(node.whenFalse);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(postExpressionLabel);
+        }
+        function bindInitializedVariableFlow(node) {
+            var name = node.name;
+            if (ts.isBindingPattern(name)) {
+                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
+                    var child = _a[_i];
+                    bindInitializedVariableFlow(child);
+                }
+            }
+            else {
+                currentFlow = createFlowAssignment(currentFlow, node);
+            }
+        }
+        function bindVariableDeclarationFlow(node) {
+            ts.forEachChild(node, bind);
+            if (node.initializer || node.parent.parent.kind === 207 || node.parent.parent.kind === 208) {
+                bindInitializedVariableFlow(node);
+            }
+        }
+        function bindCallExpressionFlow(node) {
+            var expr = node.expression;
+            while (expr.kind === 178) {
+                expr = expr.expression;
+            }
+            if (expr.kind === 179 || expr.kind === 180) {
+                ts.forEach(node.typeArguments, bind);
+                ts.forEach(node.arguments, bind);
+                bind(node.expression);
+            }
+            else {
+                ts.forEachChild(node, bind);
+            }
+        }
+        function getContainerFlags(node) {
+            switch (node.kind) {
+                case 192:
+                case 221:
+                case 224:
+                case 171:
+                case 159:
+                case 281:
+                case 265:
+                    return 1;
+                case 222:
+                    return 1 | 64;
+                case 269:
+                case 225:
+                case 223:
+                    return 1 | 32;
+                case 256:
+                    return 1 | 4 | 32;
+                case 148:
+                case 220:
+                case 147:
+                case 146:
+                case 149:
+                case 150:
+                case 151:
+                case 152:
+                case 153:
+                case 156:
+                case 157:
+                    return 1 | 4 | 32 | 8;
+                case 179:
+                case 180:
+                    return 1 | 4 | 32 | 8 | 16;
+                case 226:
+                    return 4;
+                case 145:
+                    return node.initializer ? 4 : 0;
+                case 252:
+                case 206:
+                case 207:
+                case 208:
+                case 227:
+                    return 2;
+                case 199:
+                    return ts.isFunctionLike(node.parent) ? 0 : 2;
+            }
+            return 0;
+        }
+        function addToContainerChain(next) {
+            if (lastContainer) {
+                lastContainer.nextContainer = next;
+            }
+            lastContainer = next;
+        }
+        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
+            return declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
+        }
+        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
+            switch (container.kind) {
+                case 225:
+                    return declareModuleMember(node, symbolFlags, symbolExcludes);
+                case 256:
+                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
+                case 192:
+                case 221:
+                    return declareClassMember(node, symbolFlags, symbolExcludes);
+                case 224:
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                case 159:
+                case 171:
+                case 222:
+                case 265:
+                case 281:
+                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+                case 156:
+                case 157:
+                case 151:
+                case 152:
+                case 153:
+                case 147:
+                case 146:
+                case 148:
+                case 149:
+                case 150:
+                case 220:
+                case 179:
+                case 180:
+                case 269:
+                case 223:
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+            }
+        }
+        function declareClassMember(node, symbolFlags, symbolExcludes) {
+            return node.flags & 32
+                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
+                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+        }
+        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
+            return ts.isExternalModule(file)
+                ? declareModuleMember(node, symbolFlags, symbolExcludes)
+                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
+        }
+        function hasExportDeclarations(node) {
+            var body = node.kind === 256 ? node : node.body;
+            if (body.kind === 256 || body.kind === 226) {
+                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
+                    var stat = _a[_i];
+                    if (stat.kind === 236 || stat.kind === 235) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function setExportContextFlag(node) {
+            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
+                node.flags |= 8192;
+            }
+            else {
+                node.flags &= ~8192;
+            }
+        }
+        function bindModuleDeclaration(node) {
+            setExportContextFlag(node);
+            if (ts.isAmbientModule(node)) {
+                if (node.flags & 1) {
+                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    declareSymbolAndAddToSymbolTable(node, 1024, 0);
+                }
+                else {
+                    var pattern = void 0;
+                    if (node.name.kind === 9) {
+                        var text = node.name.text;
+                        if (ts.hasZeroOrOneAsteriskCharacter(text)) {
+                            pattern = ts.tryParsePattern(text);
+                        }
+                        else {
+                            errorOnFirstToken(node.name, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, text);
+                        }
+                    }
+                    var symbol = declareSymbolAndAddToSymbolTable(node, 512, 106639);
+                    if (pattern) {
+                        (file.patternAmbientModules || (file.patternAmbientModules = [])).push({ pattern: pattern, symbol: symbol });
+                    }
+                }
+            }
+            else {
+                var state = getModuleInstanceState(node);
+                if (state === 0) {
+                    declareSymbolAndAddToSymbolTable(node, 1024, 0);
+                }
+                else {
+                    declareSymbolAndAddToSymbolTable(node, 512, 106639);
+                    if (node.symbol.flags & (16 | 32 | 256)) {
+                        node.symbol.constEnumOnlyModule = false;
+                    }
+                    else {
+                        var currentModuleIsConstEnumOnly = state === 2;
+                        if (node.symbol.constEnumOnlyModule === undefined) {
+                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
+                        }
+                        else {
+                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
+                        }
+                    }
+                }
+            }
+        }
+        function bindFunctionOrConstructorType(node) {
+            var symbol = createSymbol(131072, getDeclarationName(node));
+            addDeclarationToSymbol(symbol, node, 131072);
+            var typeLiteralSymbol = createSymbol(2048, "__type");
+            addDeclarationToSymbol(typeLiteralSymbol, node, 2048);
+            typeLiteralSymbol.members = (_a = {}, _a[symbol.name] = symbol, _a);
+            var _a;
+        }
+        function bindObjectLiteralExpression(node) {
+            if (inStrictMode) {
+                var seen = {};
+                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (prop.name.kind !== 69) {
+                        continue;
+                    }
+                    var identifier = prop.name;
+                    var currentKind = prop.kind === 253 || prop.kind === 254 || prop.kind === 147
+                        ? 1
+                        : 2;
+                    var existingKind = seen[identifier.text];
+                    if (!existingKind) {
+                        seen[identifier.text] = currentKind;
+                        continue;
+                    }
+                    if (currentKind === 1 && existingKind === 1) {
+                        var span = ts.getErrorSpanForNode(file, identifier);
+                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
+                    }
+                }
+            }
+            return bindAnonymousDeclaration(node, 4096, "__object");
+        }
+        function bindAnonymousDeclaration(node, symbolFlags, name) {
+            var symbol = createSymbol(symbolFlags, name);
+            addDeclarationToSymbol(symbol, node, symbolFlags);
+        }
+        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
+            switch (blockScopeContainer.kind) {
+                case 225:
+                    declareModuleMember(node, symbolFlags, symbolExcludes);
+                    break;
+                case 256:
+                    if (ts.isExternalModule(container)) {
+                        declareModuleMember(node, symbolFlags, symbolExcludes);
+                        break;
+                    }
+                default:
+                    if (!blockScopeContainer.locals) {
+                        blockScopeContainer.locals = {};
+                        addToContainerChain(blockScopeContainer);
+                    }
+                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
+            }
+        }
+        function bindBlockScopedVariableDeclaration(node) {
+            bindBlockScopedDeclaration(node, 2, 107455);
+        }
+        function checkStrictModeIdentifier(node) {
+            if (inStrictMode &&
+                node.originalKeywordKind >= 106 &&
+                node.originalKeywordKind <= 114 &&
+                !ts.isIdentifierName(node) &&
+                !ts.isInAmbientContext(node)) {
+                if (!file.parseDiagnostics.length) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
+                }
+            }
+        }
+        function getStrictModeIdentifierMessage(node) {
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
+        }
+        function checkStrictModeBinaryExpression(node) {
+            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
+                checkStrictModeEvalOrArguments(node, node.left);
+            }
+        }
+        function checkStrictModeCatchClause(node) {
+            if (inStrictMode && node.variableDeclaration) {
+                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
+            }
+        }
+        function checkStrictModeDeleteExpression(node) {
+            if (inStrictMode && node.expression.kind === 69) {
+                var span = ts.getErrorSpanForNode(file, node.expression);
+                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
+            }
+        }
+        function isEvalOrArgumentsIdentifier(node) {
+            return node.kind === 69 &&
+                (node.text === "eval" || node.text === "arguments");
+        }
+        function checkStrictModeEvalOrArguments(contextNode, name) {
+            if (name && name.kind === 69) {
+                var identifier = name;
+                if (isEvalOrArgumentsIdentifier(identifier)) {
+                    var span = ts.getErrorSpanForNode(file, name);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
+                }
+            }
+        }
+        function getStrictModeEvalOrArgumentsMessage(node) {
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
+        }
+        function checkStrictModeFunctionName(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+        }
+        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
+        }
+        function checkStrictModeFunctionDeclaration(node) {
+            if (languageVersion < 2) {
+                if (blockScopeContainer.kind !== 256 &&
+                    blockScopeContainer.kind !== 225 &&
+                    !ts.isFunctionLike(blockScopeContainer)) {
+                    var errorSpan = ts.getErrorSpanForNode(file, node);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
+                }
+            }
+        }
+        function checkStrictModeNumericLiteral(node) {
+            if (inStrictMode && node.isOctalLiteral) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
+            }
+        }
+        function checkStrictModePostfixUnaryExpression(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.operand);
+            }
+        }
+        function checkStrictModePrefixUnaryExpression(node) {
+            if (inStrictMode) {
+                if (node.operator === 41 || node.operator === 42) {
+                    checkStrictModeEvalOrArguments(node, node.operand);
+                }
+            }
+        }
+        function checkStrictModeWithStatement(node) {
+            if (inStrictMode) {
+                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
+            }
+        }
+        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
+            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
+        }
+        function getDestructuringParameterName(node) {
+            return "__" + ts.indexOf(node.parent.parameters, node);
+        }
+        function bind(node) {
+            if (!node) {
+                return;
+            }
+            node.parent = parent;
+            var saveInStrictMode = inStrictMode;
+            bindWorker(node);
+            if (node.kind > 138) {
+                var saveParent = parent;
+                parent = node;
+                var containerFlags = getContainerFlags(node);
+                if (containerFlags === 0) {
+                    bindChildren(node);
+                }
+                else {
+                    bindContainer(node, containerFlags);
+                }
+                parent = saveParent;
+            }
+            inStrictMode = saveInStrictMode;
+        }
+        function updateStrictModeStatementList(statements) {
+            if (!inStrictMode) {
+                for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
+                    var statement = statements_1[_i];
+                    if (!ts.isPrologueDirective(statement)) {
+                        return;
+                    }
+                    if (isUseStrictPrologueDirective(statement)) {
+                        inStrictMode = true;
+                        return;
+                    }
+                }
+            }
+        }
+        function isUseStrictPrologueDirective(node) {
+            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
+            return nodeText === '"use strict"' || nodeText === "'use strict'";
+        }
+        function bindWorker(node) {
+            switch (node.kind) {
+                case 69:
+                case 97:
+                    if (currentFlow && (ts.isExpression(node) || parent.kind === 254)) {
+                        node.flowNode = currentFlow;
+                    }
+                    return checkStrictModeIdentifier(node);
+                case 172:
+                    if (currentFlow && isNarrowableReference(node)) {
+                        node.flowNode = currentFlow;
+                    }
+                    break;
+                case 187:
+                    if (ts.isInJavaScriptFile(node)) {
+                        var specialKind = ts.getSpecialPropertyAssignmentKind(node);
+                        switch (specialKind) {
+                            case 1:
+                                bindExportsPropertyAssignment(node);
+                                break;
+                            case 2:
+                                bindModuleExportsAssignment(node);
+                                break;
+                            case 3:
+                                bindPrototypePropertyAssignment(node);
+                                break;
+                            case 4:
+                                bindThisPropertyAssignment(node);
+                                break;
+                            case 0:
+                                break;
+                            default:
+                                ts.Debug.fail("Unknown special property assignment kind");
+                        }
+                    }
+                    return checkStrictModeBinaryExpression(node);
+                case 252:
+                    return checkStrictModeCatchClause(node);
+                case 181:
+                    return checkStrictModeDeleteExpression(node);
+                case 8:
+                    return checkStrictModeNumericLiteral(node);
+                case 186:
+                    return checkStrictModePostfixUnaryExpression(node);
+                case 185:
+                    return checkStrictModePrefixUnaryExpression(node);
+                case 212:
+                    return checkStrictModeWithStatement(node);
+                case 165:
+                    seenThisKeyword = true;
+                    return;
+                case 154:
+                    return checkTypePredicate(node);
+                case 141:
+                    return declareSymbolAndAddToSymbolTable(node, 262144, 530912);
+                case 142:
+                    return bindParameter(node);
+                case 218:
+                case 169:
+                    return bindVariableDeclarationOrBindingElement(node);
+                case 145:
+                case 144:
+                case 266:
+                    return bindPropertyOrMethodOrAccessor(node, 4 | (node.questionToken ? 536870912 : 0), 0);
+                case 280:
+                    return bindJSDocProperty(node);
+                case 253:
+                case 254:
+                    return bindPropertyOrMethodOrAccessor(node, 4, 0);
+                case 255:
+                    return bindPropertyOrMethodOrAccessor(node, 8, 107455);
+                case 247:
+                    emitFlags |= 1073741824;
+                    return;
+                case 151:
+                case 152:
+                case 153:
+                    return declareSymbolAndAddToSymbolTable(node, 131072, 0);
+                case 147:
+                case 146:
+                    return bindPropertyOrMethodOrAccessor(node, 8192 | (node.questionToken ? 536870912 : 0), ts.isObjectLiteralMethod(node) ? 0 : 99263);
+                case 220:
+                    return bindFunctionDeclaration(node);
+                case 148:
+                    return declareSymbolAndAddToSymbolTable(node, 16384, 0);
+                case 149:
+                    return bindPropertyOrMethodOrAccessor(node, 32768, 41919);
+                case 150:
+                    return bindPropertyOrMethodOrAccessor(node, 65536, 74687);
+                case 156:
+                case 157:
+                case 269:
+                    return bindFunctionOrConstructorType(node);
+                case 159:
+                case 281:
+                case 265:
+                    return bindAnonymousDeclaration(node, 2048, "__type");
+                case 171:
+                    return bindObjectLiteralExpression(node);
+                case 179:
+                case 180:
+                    return bindFunctionExpression(node);
+                case 174:
+                    if (ts.isInJavaScriptFile(node)) {
+                        bindCallExpression(node);
+                    }
+                    break;
+                case 192:
+                case 221:
+                    inStrictMode = true;
+                    return bindClassLikeDeclaration(node);
+                case 222:
+                    return bindBlockScopedDeclaration(node, 64, 792960);
+                case 279:
+                case 223:
+                    return bindBlockScopedDeclaration(node, 524288, 793056);
+                case 224:
+                    return bindEnumDeclaration(node);
+                case 225:
+                    return bindModuleDeclaration(node);
+                case 229:
+                case 232:
+                case 234:
+                case 238:
+                    return declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
+                case 228:
+                    return bindNamespaceExportDeclaration(node);
+                case 231:
+                    return bindImportClause(node);
+                case 236:
+                    return bindExportDeclaration(node);
+                case 235:
+                    return bindExportAssignment(node);
+                case 256:
+                    updateStrictModeStatementList(node.statements);
+                    return bindSourceFileIfExternalModule();
+                case 199:
+                    if (!ts.isFunctionLike(node.parent)) {
+                        return;
+                    }
+                case 226:
+                    return updateStrictModeStatementList(node.statements);
+            }
+        }
+        function checkTypePredicate(node) {
+            var parameterName = node.parameterName, type = node.type;
+            if (parameterName && parameterName.kind === 69) {
+                checkStrictModeIdentifier(parameterName);
+            }
+            if (parameterName && parameterName.kind === 165) {
+                seenThisKeyword = true;
+            }
+            bind(type);
+        }
+        function bindSourceFileIfExternalModule() {
+            setExportContextFlag(file);
+            if (ts.isExternalModule(file)) {
+                bindSourceFileAsExternalModule();
+            }
+        }
+        function bindSourceFileAsExternalModule() {
+            bindAnonymousDeclaration(file, 512, "\"" + ts.removeFileExtension(file.fileName) + "\"");
+        }
+        function bindExportAssignment(node) {
+            var boundExpression = node.kind === 235 ? node.expression : node.right;
+            if (!container.symbol || !container.symbol.exports) {
+                bindAnonymousDeclaration(node, 8388608, getDeclarationName(node));
+            }
+            else if (boundExpression.kind === 69 && node.kind === 235) {
+                declareSymbol(container.symbol.exports, container.symbol, node, 8388608, 0 | 8388608);
+            }
+            else {
+                declareSymbol(container.symbol.exports, container.symbol, node, 4, 0 | 8388608);
+            }
+        }
+        function bindNamespaceExportDeclaration(node) {
+            if (node.modifiers && node.modifiers.length) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
+            }
+            if (node.parent.kind !== 256) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
+                return;
+            }
+            else {
+                var parent_6 = node.parent;
+                if (!ts.isExternalModule(parent_6)) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
+                    return;
+                }
+                if (!parent_6.isDeclarationFile) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
+                    return;
+                }
+            }
+            file.symbol.globalExports = file.symbol.globalExports || {};
+            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608, 8388608);
+        }
+        function bindExportDeclaration(node) {
+            if (!container.symbol || !container.symbol.exports) {
+                bindAnonymousDeclaration(node, 1073741824, getDeclarationName(node));
+            }
+            else if (!node.exportClause) {
+                declareSymbol(container.symbol.exports, container.symbol, node, 1073741824, 0);
+            }
+        }
+        function bindImportClause(node) {
+            if (node.name) {
+                declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
+            }
+        }
+        function setCommonJsModuleIndicator(node) {
+            if (!file.commonJsModuleIndicator) {
+                file.commonJsModuleIndicator = node;
+                bindSourceFileAsExternalModule();
+            }
+        }
+        function bindExportsPropertyAssignment(node) {
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 | 7340032, 0);
+        }
+        function bindModuleExportsAssignment(node) {
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node, 4 | 7340032 | 512, 0);
+        }
+        function bindThisPropertyAssignment(node) {
+            var assignee;
+            if (container.kind === 220 || container.kind === 220) {
+                assignee = container;
+            }
+            else if (container.kind === 148) {
+                assignee = container.parent;
+            }
+            else {
+                return;
+            }
+            assignee.symbol.members = assignee.symbol.members || {};
+            declareSymbol(assignee.symbol.members, assignee.symbol, node, 4, 0 & ~4);
+        }
+        function bindPrototypePropertyAssignment(node) {
+            var leftSideOfAssignment = node.left;
+            var classPrototype = leftSideOfAssignment.expression;
+            var constructorFunction = classPrototype.expression;
+            leftSideOfAssignment.parent = node;
+            constructorFunction.parent = classPrototype;
+            classPrototype.parent = leftSideOfAssignment;
+            var funcSymbol = container.locals[constructorFunction.text];
+            if (!funcSymbol || !(funcSymbol.flags & 16)) {
+                return;
+            }
+            if (!funcSymbol.members) {
+                funcSymbol.members = {};
+            }
+            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4, 0);
+        }
+        function bindCallExpression(node) {
+            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, false)) {
+                setCommonJsModuleIndicator(node);
+            }
+        }
+        function bindClassLikeDeclaration(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.getClassExtendsHeritageClauseElement(node) !== undefined) {
+                    emitFlags |= 262144;
+                }
+                if (ts.nodeIsDecorated(node)) {
+                    emitFlags |= 524288;
+                }
+            }
+            if (node.kind === 221) {
+                bindBlockScopedDeclaration(node, 32, 899519);
+            }
+            else {
+                var bindingName = node.name ? node.name.text : "__class";
+                bindAnonymousDeclaration(node, 32, bindingName);
+                if (node.name) {
+                    classifiableNames[node.name.text] = node.name.text;
+                }
+            }
+            var symbol = node.symbol;
+            var prototypeSymbol = createSymbol(4 | 134217728, "prototype");
+            if (ts.hasProperty(symbol.exports, prototypeSymbol.name)) {
+                if (node.name) {
+                    node.name.parent = node;
+                }
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
+            }
+            symbol.exports[prototypeSymbol.name] = prototypeSymbol;
+            prototypeSymbol.parent = symbol;
+        }
+        function bindEnumDeclaration(node) {
+            return ts.isConst(node)
+                ? bindBlockScopedDeclaration(node, 128, 899967)
+                : bindBlockScopedDeclaration(node, 256, 899327);
+        }
+        function bindVariableDeclarationOrBindingElement(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (!ts.isBindingPattern(node.name)) {
+                if (ts.isBlockOrCatchScoped(node)) {
+                    bindBlockScopedVariableDeclaration(node);
+                }
+                else if (ts.isParameterDeclaration(node)) {
+                    declareSymbolAndAddToSymbolTable(node, 1, 107455);
+                }
+                else {
+                    declareSymbolAndAddToSymbolTable(node, 1, 107454);
+                }
+            }
+        }
+        function bindParameter(node) {
+            if (!ts.isDeclarationFile(file) &&
+                !ts.isInAmbientContext(node) &&
+                ts.nodeIsDecorated(node)) {
+                emitFlags |= (524288 | 1048576);
+            }
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (ts.isBindingPattern(node.name)) {
+                bindAnonymousDeclaration(node, 1, getDestructuringParameterName(node));
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 1, 107455);
+            }
+            if (ts.isParameterPropertyDeclaration(node)) {
+                var classDeclaration = node.parent.parent;
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 | (node.questionToken ? 536870912 : 0), 0);
+            }
+        }
+        function bindFunctionDeclaration(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152;
+                }
+            }
+            checkStrictModeFunctionName(node);
+            if (inStrictMode) {
+                checkStrictModeFunctionDeclaration(node);
+                bindBlockScopedDeclaration(node, 16, 106927);
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 16, 106927);
+            }
+        }
+        function bindFunctionExpression(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152;
+                }
+            }
+            if (currentFlow) {
+                node.flowNode = currentFlow;
+            }
+            checkStrictModeFunctionName(node);
+            var bindingName = node.name ? node.name.text : "__function";
+            return bindAnonymousDeclaration(node, 16, bindingName);
+        }
+        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152;
+                }
+                if (ts.nodeIsDecorated(node)) {
+                    emitFlags |= 524288;
+                }
+            }
+            return ts.hasDynamicName(node)
+                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
+                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
+        }
+        function bindJSDocProperty(node) {
+            return declareSymbolAndAddToSymbolTable(node, 4, 0);
+        }
+        function shouldReportErrorOnModuleDeclaration(node) {
+            var instanceState = getModuleInstanceState(node);
+            return instanceState === 1 || (instanceState === 2 && options.preserveConstEnums);
+        }
+        function checkUnreachable(node) {
+            if (!(currentFlow.flags & 1)) {
+                return false;
+            }
+            if (currentFlow === unreachableFlow) {
+                var reportError = (ts.isStatement(node) && node.kind !== 201) ||
+                    node.kind === 221 ||
+                    (node.kind === 225 && shouldReportErrorOnModuleDeclaration(node)) ||
+                    (node.kind === 224 && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
+                if (reportError) {
+                    currentFlow = reportedUnreachableFlow;
+                    var reportUnreachableCode = !options.allowUnreachableCode &&
+                        !ts.isInAmbientContext(node) &&
+                        (node.kind !== 200 ||
+                            ts.getCombinedNodeFlags(node.declarationList) & 3072 ||
+                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
+                    if (reportUnreachableCode) {
+                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
+                    }
+                }
+            }
+            return true;
+        }
+    }
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var nextSymbolId = 1;
+    var nextNodeId = 1;
+    var nextMergeId = 1;
+    var nextFlowId = 1;
+    function getNodeId(node) {
+        if (!node.id) {
+            node.id = nextNodeId;
+            nextNodeId++;
+        }
+        return node.id;
+    }
+    ts.getNodeId = getNodeId;
+    ts.checkTime = 0;
+    function getSymbolId(symbol) {
+        if (!symbol.id) {
+            symbol.id = nextSymbolId;
+            nextSymbolId++;
+        }
+        return symbol.id;
+    }
+    ts.getSymbolId = getSymbolId;
+    function createTypeChecker(host, produceDiagnostics) {
+        var cancellationToken;
+        var Symbol = ts.objectAllocator.getSymbolConstructor();
+        var Type = ts.objectAllocator.getTypeConstructor();
+        var Signature = ts.objectAllocator.getSignatureConstructor();
+        var typeCount = 0;
+        var symbolCount = 0;
+        var emptyArray = [];
+        var emptySymbols = {};
+        var compilerOptions = host.getCompilerOptions();
+        var languageVersion = compilerOptions.target || 0;
+        var modulekind = ts.getEmitModuleKind(compilerOptions);
+        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
+        var strictNullChecks = compilerOptions.strictNullChecks;
+        var emitResolver = createResolver();
+        var undefinedSymbol = createSymbol(4 | 67108864, "undefined");
+        undefinedSymbol.declarations = [];
+        var argumentsSymbol = createSymbol(4 | 67108864, "arguments");
+        var checker = {
+            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
+            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
+            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
+            getTypeCount: function () { return typeCount; },
+            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
+            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
+            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
+            getDiagnostics: getDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getTypeOfSymbolAtLocation: getTypeOfSymbolAtLocation,
+            getSymbolsOfParameterPropertyDeclaration: getSymbolsOfParameterPropertyDeclaration,
+            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
+            getPropertiesOfType: getPropertiesOfType,
+            getPropertyOfType: getPropertyOfType,
+            getSignaturesOfType: getSignaturesOfType,
+            getIndexTypeOfType: getIndexTypeOfType,
+            getBaseTypes: getBaseTypes,
+            getReturnTypeOfSignature: getReturnTypeOfSignature,
+            getNonNullableType: getNonNullableType,
+            getSymbolsInScope: getSymbolsInScope,
+            getSymbolAtLocation: getSymbolAtLocation,
+            getShorthandAssignmentValueSymbol: getShorthandAssignmentValueSymbol,
+            getExportSpecifierLocalTargetSymbol: getExportSpecifierLocalTargetSymbol,
+            getTypeAtLocation: getTypeOfNode,
+            getPropertySymbolOfDestructuringAssignment: getPropertySymbolOfDestructuringAssignment,
+            typeToString: typeToString,
+            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
+            symbolToString: symbolToString,
+            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
+            getRootSymbols: getRootSymbols,
+            getContextualType: getContextualType,
+            getFullyQualifiedName: getFullyQualifiedName,
+            getResolvedSignature: getResolvedSignature,
+            getConstantValue: getConstantValue,
+            isValidPropertyAccess: isValidPropertyAccess,
+            getSignatureFromDeclaration: getSignatureFromDeclaration,
+            isImplementationOfOverload: isImplementationOfOverload,
+            getAliasedSymbol: resolveAlias,
+            getEmitResolver: getEmitResolver,
+            getExportsOfModule: getExportsOfModuleAsArray,
+            getJsxElementAttributesType: getJsxElementAttributesType,
+            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
+            isOptionalParameter: isOptionalParameter
+        };
+        var unknownSymbol = createSymbol(4 | 67108864, "unknown");
+        var resolvingSymbol = createSymbol(67108864, "__resolving__");
+        var anyType = createIntrinsicType(1, "any");
+        var stringType = createIntrinsicType(2, "string");
+        var numberType = createIntrinsicType(4, "number");
+        var booleanType = createIntrinsicType(8, "boolean");
+        var esSymbolType = createIntrinsicType(16777216, "symbol");
+        var voidType = createIntrinsicType(16, "void");
+        var undefinedType = createIntrinsicType(32, "undefined");
+        var undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(32 | 2097152, "undefined");
+        var nullType = createIntrinsicType(64, "null");
+        var nullWideningType = strictNullChecks ? nullType : createIntrinsicType(64 | 2097152, "null");
+        var unknownType = createIntrinsicType(1, "unknown");
+        var neverType = createIntrinsicType(134217728, "never");
+        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        emptyGenericType.instantiations = {};
+        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        anyFunctionType.flags |= 8388608;
+        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, undefined, 0, false, false);
+        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, undefined, 0, false, false);
+        var enumNumberIndexInfo = createIndexInfo(stringType, true);
+        var globals = {};
+        var patternAmbientModules;
+        var getGlobalESSymbolConstructorSymbol;
+        var getGlobalPromiseConstructorSymbol;
+        var globalObjectType;
+        var globalFunctionType;
+        var globalArrayType;
+        var globalReadonlyArrayType;
+        var globalStringType;
+        var globalNumberType;
+        var globalBooleanType;
+        var globalRegExpType;
+        var anyArrayType;
+        var anyReadonlyArrayType;
+        var getGlobalTemplateStringsArrayType;
+        var getGlobalESSymbolType;
+        var getGlobalIterableType;
+        var getGlobalIteratorType;
+        var getGlobalIterableIteratorType;
+        var getGlobalClassDecoratorType;
+        var getGlobalParameterDecoratorType;
+        var getGlobalPropertyDecoratorType;
+        var getGlobalMethodDecoratorType;
+        var getGlobalTypedPropertyDescriptorType;
+        var getGlobalPromiseType;
+        var tryGetGlobalPromiseType;
+        var getGlobalPromiseLikeType;
+        var getInstantiatedGlobalPromiseLikeType;
+        var getGlobalPromiseConstructorLikeType;
+        var getGlobalThenableType;
+        var jsxElementClassType;
+        var deferredNodes;
+        var flowLoopStart = 0;
+        var flowLoopCount = 0;
+        var visitedFlowCount = 0;
+        var tupleTypes = {};
+        var unionTypes = {};
+        var intersectionTypes = {};
+        var stringLiteralTypes = {};
+        var resolutionTargets = [];
+        var resolutionResults = [];
+        var resolutionPropertyNames = [];
+        var mergedSymbols = [];
+        var symbolLinks = [];
+        var nodeLinks = [];
+        var flowLoopCaches = [];
+        var flowLoopNodes = [];
+        var flowLoopKeys = [];
+        var flowLoopTypes = [];
+        var visitedFlowNodes = [];
+        var visitedFlowTypes = [];
+        var potentialThisCollisions = [];
+        var awaitedTypeStack = [];
+        var diagnostics = ts.createDiagnosticCollection();
+        var typeofEQFacts = {
+            "string": 1,
+            "number": 2,
+            "boolean": 4,
+            "symbol": 8,
+            "undefined": 16384,
+            "object": 16,
+            "function": 32
+        };
+        var typeofNEFacts = {
+            "string": 128,
+            "number": 256,
+            "boolean": 512,
+            "symbol": 1024,
+            "undefined": 131072,
+            "object": 2048,
+            "function": 4096
+        };
+        var typeofTypesByName = {
+            "string": stringType,
+            "number": numberType,
+            "boolean": booleanType,
+            "symbol": esSymbolType,
+            "undefined": undefinedType
+        };
+        var jsxElementType;
+        var jsxTypes = {};
+        var JsxNames = {
+            JSX: "JSX",
+            IntrinsicElements: "IntrinsicElements",
+            ElementClass: "ElementClass",
+            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
+            Element: "Element",
+            IntrinsicAttributes: "IntrinsicAttributes",
+            IntrinsicClassAttributes: "IntrinsicClassAttributes"
+        };
+        var subtypeRelation = {};
+        var assignableRelation = {};
+        var comparableRelation = {};
+        var identityRelation = {};
+        var _displayBuilder;
+        var builtinGlobals = (_a = {},
+            _a[undefinedSymbol.name] = undefinedSymbol,
+            _a
+        );
+        initializeTypeChecker();
+        return checker;
+        function getEmitResolver(sourceFile, cancellationToken) {
+            getDiagnostics(sourceFile, cancellationToken);
+            return emitResolver;
+        }
+        function error(location, message, arg0, arg1, arg2) {
+            var diagnostic = location
+                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
+                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
+            diagnostics.add(diagnostic);
+        }
+        function createSymbol(flags, name) {
+            symbolCount++;
+            return new Symbol(flags, name);
+        }
+        function getExcludedSymbolFlags(flags) {
+            var result = 0;
+            if (flags & 2)
+                result |= 107455;
+            if (flags & 1)
+                result |= 107454;
+            if (flags & 4)
+                result |= 0;
+            if (flags & 8)
+                result |= 107455;
+            if (flags & 16)
+                result |= 106927;
+            if (flags & 32)
+                result |= 899519;
+            if (flags & 64)
+                result |= 792960;
+            if (flags & 256)
+                result |= 899327;
+            if (flags & 128)
+                result |= 899967;
+            if (flags & 512)
+                result |= 106639;
+            if (flags & 8192)
+                result |= 99263;
+            if (flags & 32768)
+                result |= 41919;
+            if (flags & 65536)
+                result |= 74687;
+            if (flags & 262144)
+                result |= 530912;
+            if (flags & 524288)
+                result |= 793056;
+            if (flags & 8388608)
+                result |= 8388608;
+            return result;
+        }
+        function recordMergedSymbol(target, source) {
+            if (!source.mergeId) {
+                source.mergeId = nextMergeId;
+                nextMergeId++;
+            }
+            mergedSymbols[source.mergeId] = target;
+        }
+        function cloneSymbol(symbol) {
+            var result = createSymbol(symbol.flags | 33554432, symbol.name);
+            result.declarations = symbol.declarations.slice(0);
+            result.parent = symbol.parent;
+            if (symbol.valueDeclaration)
+                result.valueDeclaration = symbol.valueDeclaration;
+            if (symbol.constEnumOnlyModule)
+                result.constEnumOnlyModule = true;
+            if (symbol.members)
+                result.members = cloneSymbolTable(symbol.members);
+            if (symbol.exports)
+                result.exports = cloneSymbolTable(symbol.exports);
+            recordMergedSymbol(result, symbol);
+            return result;
+        }
+        function mergeSymbol(target, source) {
+            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
+                if (source.flags & 512 && target.flags & 512 && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
+                    target.constEnumOnlyModule = false;
+                }
+                target.flags |= source.flags;
+                if (source.valueDeclaration &&
+                    (!target.valueDeclaration ||
+                        (target.valueDeclaration.kind === 225 && source.valueDeclaration.kind !== 225))) {
+                    target.valueDeclaration = source.valueDeclaration;
+                }
+                ts.forEach(source.declarations, function (node) {
+                    target.declarations.push(node);
+                });
+                if (source.members) {
+                    if (!target.members)
+                        target.members = {};
+                    mergeSymbolTable(target.members, source.members);
+                }
+                if (source.exports) {
+                    if (!target.exports)
+                        target.exports = {};
+                    mergeSymbolTable(target.exports, source.exports);
+                }
+                recordMergedSymbol(target, source);
+            }
+            else {
+                var message_2 = target.flags & 2 || source.flags & 2
+                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
+                ts.forEach(source.declarations, function (node) {
+                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                });
+                ts.forEach(target.declarations, function (node) {
+                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                });
+            }
+        }
+        function cloneSymbolTable(symbolTable) {
+            var result = {};
+            for (var id in symbolTable) {
+                if (ts.hasProperty(symbolTable, id)) {
+                    result[id] = symbolTable[id];
+                }
+            }
+            return result;
+        }
+        function mergeSymbolTable(target, source) {
+            for (var id in source) {
+                if (ts.hasProperty(source, id)) {
+                    if (!ts.hasProperty(target, id)) {
+                        target[id] = source[id];
+                    }
+                    else {
+                        var symbol = target[id];
+                        if (!(symbol.flags & 33554432)) {
+                            target[id] = symbol = cloneSymbol(symbol);
+                        }
+                        mergeSymbol(symbol, source[id]);
+                    }
+                }
+            }
+        }
+        function mergeModuleAugmentation(moduleName) {
+            var moduleAugmentation = moduleName.parent;
+            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
+                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
+                return;
+            }
+            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
+                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
+            }
+            else {
+                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
+                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
+                    : undefined;
+                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError);
+                if (!mainModule) {
+                    return;
+                }
+                mainModule = resolveExternalModuleSymbol(mainModule);
+                if (mainModule.flags & 1536) {
+                    mainModule = mainModule.flags & 33554432 ? mainModule : cloneSymbol(mainModule);
+                    mergeSymbol(mainModule, moduleAugmentation.symbol);
+                }
+                else {
+                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
+                }
+            }
+        }
+        function addToSymbolTable(target, source, message) {
+            for (var id in source) {
+                if (ts.hasProperty(source, id)) {
+                    if (ts.hasProperty(target, id)) {
+                        ts.forEach(target[id].declarations, addDeclarationDiagnostic(id, message));
+                    }
+                    else {
+                        target[id] = source[id];
+                    }
+                }
+            }
+            function addDeclarationDiagnostic(id, message) {
+                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
+            }
+        }
+        function getSymbolLinks(symbol) {
+            if (symbol.flags & 67108864)
+                return symbol;
+            var id = getSymbolId(symbol);
+            return symbolLinks[id] || (symbolLinks[id] = {});
+        }
+        function getNodeLinks(node) {
+            var nodeId = getNodeId(node);
+            return nodeLinks[nodeId] || (nodeLinks[nodeId] = {});
+        }
+        function isGlobalSourceFile(node) {
+            return node.kind === 256 && !ts.isExternalOrCommonJsModule(node);
+        }
+        function getSymbol(symbols, name, meaning) {
+            if (meaning && ts.hasProperty(symbols, name)) {
+                var symbol = symbols[name];
+                ts.Debug.assert((symbol.flags & 16777216) === 0, "Should never get an instantiated symbol here.");
+                if (symbol.flags & meaning) {
+                    return symbol;
+                }
+                if (symbol.flags & 8388608) {
+                    var target = resolveAlias(symbol);
+                    if (target === unknownSymbol || target.flags & meaning) {
+                        return symbol;
+                    }
+                }
+            }
+        }
+        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
+            var constructorDeclaration = parameter.parent;
+            var classDeclaration = parameter.parent.parent;
+            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455);
+            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455);
+            if (parameterSymbol && propertySymbol) {
+                return [parameterSymbol, propertySymbol];
+            }
+            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
+        }
+        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
+            var declarationFile = ts.getSourceFileOfNode(declaration);
+            var useFile = ts.getSourceFileOfNode(usage);
+            if (declarationFile !== useFile) {
+                if (modulekind || (!compilerOptions.outFile && !compilerOptions.out)) {
+                    return true;
+                }
+                var sourceFiles = host.getSourceFiles();
+                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
+            }
+            if (declaration.pos <= usage.pos) {
+                return declaration.kind !== 218 ||
+                    !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
+            }
+            return isUsedInFunctionOrNonStaticProperty(declaration, usage);
+            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
+                var container = ts.getEnclosingBlockScopeContainer(declaration);
+                switch (declaration.parent.parent.kind) {
+                    case 200:
+                    case 206:
+                    case 208:
+                        if (isSameScopeDescendentOf(usage, declaration, container)) {
+                            return true;
+                        }
+                        break;
+                }
+                switch (declaration.parent.parent.kind) {
+                    case 207:
+                    case 208:
+                        if (isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container)) {
+                            return true;
+                        }
+                }
+                return false;
+            }
+            function isUsedInFunctionOrNonStaticProperty(declaration, usage) {
+                var container = ts.getEnclosingBlockScopeContainer(declaration);
+                var current = usage;
+                while (current) {
+                    if (current === container) {
+                        return false;
+                    }
+                    if (ts.isFunctionLike(current)) {
+                        return true;
+                    }
+                    var initializerOfNonStaticProperty = current.parent &&
+                        current.parent.kind === 145 &&
+                        (current.parent.flags & 32) === 0 &&
+                        current.parent.initializer === current;
+                    if (initializerOfNonStaticProperty) {
+                        return true;
+                    }
+                    current = current.parent;
+                }
+                return false;
+            }
+        }
+        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg) {
+            var result;
+            var lastLocation;
+            var propertyWithInvalidInitializer;
+            var errorLocation = location;
+            var grandparent;
+            var isInExternalModule = false;
+            loop: while (location) {
+                if (location.locals && !isGlobalSourceFile(location)) {
+                    if (result = getSymbol(location.locals, name, meaning)) {
+                        var useResult = true;
+                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
+                            if (meaning & result.flags & 793056 && lastLocation.kind !== 273) {
+                                useResult = result.flags & 262144
+                                    ? lastLocation === location.type ||
+                                        lastLocation.kind === 142 ||
+                                        lastLocation.kind === 141
+                                    : false;
+                            }
+                            if (meaning & 107455 && result.flags & 1) {
+                                useResult =
+                                    lastLocation.kind === 142 ||
+                                        (lastLocation === location.type &&
+                                            result.valueDeclaration.kind === 142);
+                            }
+                        }
+                        if (useResult) {
+                            break loop;
+                        }
+                        else {
+                            result = undefined;
+                        }
+                    }
+                }
+                switch (location.kind) {
+                    case 256:
+                        if (!ts.isExternalOrCommonJsModule(location))
+                            break;
+                        isInExternalModule = true;
+                    case 225:
+                        var moduleExports = getSymbolOfNode(location).exports;
+                        if (location.kind === 256 || ts.isAmbientModule(location)) {
+                            if (result = moduleExports["default"]) {
+                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
+                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
+                                    break loop;
+                                }
+                                result = undefined;
+                            }
+                            if (ts.hasProperty(moduleExports, name) &&
+                                moduleExports[name].flags === 8388608 &&
+                                ts.getDeclarationOfKind(moduleExports[name], 238)) {
+                                break;
+                            }
+                        }
+                        if (result = getSymbol(moduleExports, name, meaning & 8914931)) {
+                            break loop;
+                        }
+                        break;
+                    case 224:
+                        if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & 8)) {
+                            break loop;
+                        }
+                        break;
+                    case 145:
+                    case 144:
+                        if (ts.isClassLike(location.parent) && !(location.flags & 32)) {
+                            var ctor = findConstructorDeclaration(location.parent);
+                            if (ctor && ctor.locals) {
+                                if (getSymbol(ctor.locals, name, meaning & 107455)) {
+                                    propertyWithInvalidInitializer = location;
+                                }
+                            }
+                        }
+                        break;
+                    case 221:
+                    case 192:
+                    case 222:
+                        if (result = getSymbol(getSymbolOfNode(location).members, name, meaning & 793056)) {
+                            if (lastLocation && lastLocation.flags & 32) {
+                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
+                                return undefined;
+                            }
+                            break loop;
+                        }
+                        if (location.kind === 192 && meaning & 32) {
+                            var className = location.name;
+                            if (className && name === className.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    case 140:
+                        grandparent = location.parent.parent;
+                        if (ts.isClassLike(grandparent) || grandparent.kind === 222) {
+                            if (result = getSymbol(getSymbolOfNode(grandparent).members, name, meaning & 793056)) {
+                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
+                                return undefined;
+                            }
+                        }
+                        break;
+                    case 147:
+                    case 146:
+                    case 148:
+                    case 149:
+                    case 150:
+                    case 220:
+                    case 180:
+                        if (meaning & 3 && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        break;
+                    case 179:
+                        if (meaning & 3 && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        if (meaning & 16) {
+                            var functionName = location.name;
+                            if (functionName && name === functionName.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    case 143:
+                        if (location.parent && location.parent.kind === 142) {
+                            location = location.parent;
+                        }
+                        if (location.parent && ts.isClassElement(location.parent)) {
+                            location = location.parent;
+                        }
+                        break;
+                }
+                lastLocation = location;
+                location = location.parent;
+            }
+            if (!result) {
+                result = getSymbol(globals, name, meaning);
+            }
+            if (!result) {
+                if (nameNotFoundMessage) {
+                    if (!checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg)) {
+                        error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                    }
+                }
+                return undefined;
+            }
+            if (nameNotFoundMessage) {
+                if (propertyWithInvalidInitializer) {
+                    var propertyName = propertyWithInvalidInitializer.name;
+                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                    return undefined;
+                }
+                if (meaning & 2) {
+                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
+                    if (exportOrLocalSymbol.flags & 2) {
+                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
+                    }
+                }
+                if (result && isInExternalModule) {
+                    var decls = result.declarations;
+                    if (decls && decls.length === 1 && decls[0].kind === 228) {
+                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
+                    }
+                }
+            }
+            return result;
+        }
+        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
+            if (!errorLocation || (errorLocation.kind === 69 && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
+                return false;
+            }
+            var container = ts.getThisContainer(errorLocation, true);
+            var location = container;
+            while (location) {
+                if (ts.isClassLike(location.parent)) {
+                    var classSymbol = getSymbolOfNode(location.parent);
+                    if (!classSymbol) {
+                        break;
+                    }
+                    var constructorType = getTypeOfSymbol(classSymbol);
+                    if (getPropertyOfType(constructorType, name)) {
+                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
+                        return true;
+                    }
+                    if (location === container && !(location.flags & 32)) {
+                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
+                        if (getPropertyOfType(instanceType, name)) {
+                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                            return true;
+                        }
+                    }
+                }
+                location = location.parent;
+            }
+            return false;
+        }
+        function checkResolvedBlockScopedVariable(result, errorLocation) {
+            ts.Debug.assert((result.flags & 2) !== 0);
+            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) ? d : undefined; });
+            ts.Debug.assert(declaration !== undefined, "Block-scoped variable declaration is undefined");
+            if (!isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 218), errorLocation)) {
+                error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+            }
+        }
+        function isSameScopeDescendentOf(initial, parent, stopAt) {
+            if (!parent) {
+                return false;
+            }
+            for (var current = initial; current && current !== stopAt && !ts.isFunctionLike(current); current = current.parent) {
+                if (current === parent) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function getAnyImportSyntax(node) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                if (node.kind === 229) {
+                    return node;
+                }
+                while (node && node.kind !== 230) {
+                    node = node.parent;
+                }
+                return node;
+            }
+        }
+        function getDeclarationOfAliasSymbol(symbol) {
+            return ts.forEach(symbol.declarations, function (d) { return ts.isAliasSymbolDeclaration(d) ? d : undefined; });
+        }
+        function getTargetOfImportEqualsDeclaration(node) {
+            if (node.moduleReference.kind === 240) {
+                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
+            }
+            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, node);
+        }
+        function getTargetOfImportClause(node) {
+            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
+            if (moduleSymbol) {
+                var exportDefaultSymbol = moduleSymbol.exports["export="] ?
+                    getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
+                    resolveSymbol(moduleSymbol.exports["default"]);
+                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
+                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
+                }
+                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
+                    return resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
+                }
+                return exportDefaultSymbol;
+            }
+        }
+        function getTargetOfNamespaceImport(node) {
+            var moduleSpecifier = node.parent.parent.moduleSpecifier;
+            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier);
+        }
+        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
+            if (valueSymbol.flags & (793056 | 1536)) {
+                return valueSymbol;
+            }
+            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
+            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
+            result.parent = valueSymbol.parent || typeSymbol.parent;
+            if (valueSymbol.valueDeclaration)
+                result.valueDeclaration = valueSymbol.valueDeclaration;
+            if (typeSymbol.members)
+                result.members = typeSymbol.members;
+            if (valueSymbol.exports)
+                result.exports = valueSymbol.exports;
+            return result;
+        }
+        function getExportOfModule(symbol, name) {
+            if (symbol.flags & 1536) {
+                var exports = getExportsOfSymbol(symbol);
+                if (ts.hasProperty(exports, name)) {
+                    return resolveSymbol(exports[name]);
+                }
+            }
+        }
+        function getPropertyOfVariable(symbol, name) {
+            if (symbol.flags & 3) {
+                var typeAnnotation = symbol.valueDeclaration.type;
+                if (typeAnnotation) {
+                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
+                }
+            }
+        }
+        function getExternalModuleMember(node, specifier) {
+            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier);
+            if (targetSymbol) {
+                var name_10 = specifier.propertyName || specifier.name;
+                if (name_10.text) {
+                    var symbolFromVariable = void 0;
+                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
+                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_10.text);
+                    }
+                    else {
+                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_10.text);
+                    }
+                    symbolFromVariable = resolveSymbol(symbolFromVariable);
+                    var symbolFromModule = getExportOfModule(targetSymbol, name_10.text);
+                    var symbol = symbolFromModule && symbolFromVariable ?
+                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
+                        symbolFromModule || symbolFromVariable;
+                    if (!symbol) {
+                        error(name_10, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_10));
+                    }
+                    return symbol;
+                }
+            }
+        }
+        function getTargetOfImportSpecifier(node) {
+            return getExternalModuleMember(node.parent.parent.parent, node);
+        }
+        function getTargetOfGlobalModuleExportDeclaration(node) {
+            return resolveExternalModuleSymbol(node.parent.symbol);
+        }
+        function getTargetOfExportSpecifier(node) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node) :
+                resolveEntityName(node.propertyName || node.name, 107455 | 793056 | 1536);
+        }
+        function getTargetOfExportAssignment(node) {
+            return resolveEntityName(node.expression, 107455 | 793056 | 1536);
+        }
+        function getTargetOfAliasDeclaration(node) {
+            switch (node.kind) {
+                case 229:
+                    return getTargetOfImportEqualsDeclaration(node);
+                case 231:
+                    return getTargetOfImportClause(node);
+                case 232:
+                    return getTargetOfNamespaceImport(node);
+                case 234:
+                    return getTargetOfImportSpecifier(node);
+                case 238:
+                    return getTargetOfExportSpecifier(node);
+                case 235:
+                    return getTargetOfExportAssignment(node);
+                case 228:
+                    return getTargetOfGlobalModuleExportDeclaration(node);
+            }
+        }
+        function resolveSymbol(symbol) {
+            return symbol && symbol.flags & 8388608 && !(symbol.flags & (107455 | 793056 | 1536)) ? resolveAlias(symbol) : symbol;
+        }
+        function resolveAlias(symbol) {
+            ts.Debug.assert((symbol.flags & 8388608) !== 0, "Should only get Alias here.");
+            var links = getSymbolLinks(symbol);
+            if (!links.target) {
+                links.target = resolvingSymbol;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                var target = getTargetOfAliasDeclaration(node);
+                if (links.target === resolvingSymbol) {
+                    links.target = target || unknownSymbol;
+                }
+                else {
+                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
+                }
+            }
+            else if (links.target === resolvingSymbol) {
+                links.target = unknownSymbol;
+            }
+            return links.target;
+        }
+        function markExportAsReferenced(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target) {
+                var markAlias = target === unknownSymbol ||
+                    ((target.flags & 107455) && !isConstEnumOrConstEnumOnlyModule(target));
+                if (markAlias) {
+                    markAliasSymbolAsReferenced(symbol);
+                }
+            }
+        }
+        function markAliasSymbolAsReferenced(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.referenced) {
+                links.referenced = true;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                if (node.kind === 235) {
+                    checkExpressionCached(node.expression);
+                }
+                else if (node.kind === 238) {
+                    checkExpressionCached(node.propertyName || node.name);
+                }
+                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    checkExpressionCached(node.moduleReference);
+                }
+            }
+        }
+        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importDeclaration, dontResolveAlias) {
+            if (entityName.kind === 69 && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            if (entityName.kind === 69 || entityName.parent.kind === 139) {
+                return resolveEntityName(entityName, 1536, false, dontResolveAlias);
+            }
+            else {
+                ts.Debug.assert(entityName.parent.kind === 229);
+                return resolveEntityName(entityName, 107455 | 793056 | 1536, false, dontResolveAlias);
+            }
+        }
+        function getFullyQualifiedName(symbol) {
+            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
+        }
+        function resolveEntityName(name, meaning, ignoreErrors, dontResolveAlias) {
+            if (ts.nodeIsMissing(name)) {
+                return undefined;
+            }
+            var symbol;
+            if (name.kind === 69) {
+                var message = meaning === 1536 ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
+                symbol = resolveName(name, name.text, meaning, ignoreErrors ? undefined : message, name);
+                if (!symbol) {
+                    return undefined;
+                }
+            }
+            else if (name.kind === 139 || name.kind === 172) {
+                var left = name.kind === 139 ? name.left : name.expression;
+                var right = name.kind === 139 ? name.right : name.name;
+                var namespace = resolveEntityName(left, 1536, ignoreErrors);
+                if (!namespace || namespace === unknownSymbol || ts.nodeIsMissing(right)) {
+                    return undefined;
+                }
+                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
+                if (!symbol) {
+                    if (!ignoreErrors) {
+                        error(right, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
+                    }
+                    return undefined;
+                }
+            }
+            else {
+                ts.Debug.fail("Unknown entity name kind.");
+            }
+            ts.Debug.assert((symbol.flags & 16777216) === 0, "Should never get an instantiated symbol here.");
+            return (symbol.flags & meaning) || dontResolveAlias ? symbol : resolveAlias(symbol);
+        }
+        function resolveExternalModuleName(location, moduleReferenceExpression) {
+            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
+        }
+        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError) {
+            if (moduleReferenceExpression.kind !== 9) {
+                return;
+            }
+            var moduleReferenceLiteral = moduleReferenceExpression;
+            var moduleName = ts.escapeIdentifier(moduleReferenceLiteral.text);
+            if (moduleName === undefined) {
+                return;
+            }
+            var isRelative = ts.isExternalModuleNameRelative(moduleName);
+            if (!isRelative) {
+                var symbol = getSymbol(globals, '"' + moduleName + '"', 512);
+                if (symbol) {
+                    return getMergedSymbol(symbol);
+                }
+            }
+            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReferenceLiteral.text);
+            var sourceFile = resolvedModule && host.getSourceFile(resolvedModule.resolvedFileName);
+            if (sourceFile) {
+                if (sourceFile.symbol) {
+                    return getMergedSymbol(sourceFile.symbol);
+                }
+                if (moduleNotFoundError) {
+                    error(moduleReferenceLiteral, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
+                }
+                return undefined;
+            }
+            if (patternAmbientModules) {
+                var pattern = ts.findBestPatternMatch(patternAmbientModules, function (_) { return _.pattern; }, moduleName);
+                if (pattern) {
+                    return getMergedSymbol(pattern.symbol);
+                }
+            }
+            if (moduleNotFoundError) {
+                error(moduleReferenceLiteral, moduleNotFoundError, moduleName);
+            }
+            return undefined;
+        }
+        function resolveExternalModuleSymbol(moduleSymbol) {
+            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports["export="])) || moduleSymbol;
+        }
+        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression) {
+            var symbol = resolveExternalModuleSymbol(moduleSymbol);
+            if (symbol && !(symbol.flags & (1536 | 3))) {
+                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
+                symbol = undefined;
+            }
+            return symbol;
+        }
+        function hasExportAssignmentSymbol(moduleSymbol) {
+            return moduleSymbol.exports["export="] !== undefined;
+        }
+        function getExportsOfModuleAsArray(moduleSymbol) {
+            return symbolsToArray(getExportsOfModule(moduleSymbol));
+        }
+        function getExportsOfSymbol(symbol) {
+            return symbol.flags & 1536 ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
+        }
+        function getExportsOfModule(moduleSymbol) {
+            var links = getSymbolLinks(moduleSymbol);
+            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
+        }
+        function extendExportSymbols(target, source, lookupTable, exportNode) {
+            for (var id in source) {
+                if (id !== "default" && !ts.hasProperty(target, id)) {
+                    target[id] = source[id];
+                    if (lookupTable && exportNode) {
+                        lookupTable[id] = {
+                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
+                        };
+                    }
+                }
+                else if (lookupTable && exportNode && id !== "default" && ts.hasProperty(target, id) && resolveSymbol(target[id]) !== resolveSymbol(source[id])) {
+                    if (!lookupTable[id].exportsWithDuplicate) {
+                        lookupTable[id].exportsWithDuplicate = [exportNode];
+                    }
+                    else {
+                        lookupTable[id].exportsWithDuplicate.push(exportNode);
+                    }
+                }
+            }
+        }
+        function getExportsForModule(moduleSymbol) {
+            var visitedSymbols = [];
+            return visit(moduleSymbol) || moduleSymbol.exports;
+            function visit(symbol) {
+                if (!(symbol && symbol.flags & 1952 && !ts.contains(visitedSymbols, symbol))) {
+                    return;
+                }
+                visitedSymbols.push(symbol);
+                var symbols = cloneSymbolTable(symbol.exports);
+                var exportStars = symbol.exports["__export"];
+                if (exportStars) {
+                    var nestedSymbols = {};
+                    var lookupTable = {};
+                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
+                        var node = _a[_i];
+                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
+                        var exportedSymbols = visit(resolvedModule);
+                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable, node);
+                    }
+                    for (var id in lookupTable) {
+                        var exportsWithDuplicate = lookupTable[id].exportsWithDuplicate;
+                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || ts.hasProperty(symbols, id)) {
+                            continue;
+                        }
+                        for (var _b = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _b < exportsWithDuplicate_1.length; _b++) {
+                            var node = exportsWithDuplicate_1[_b];
+                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable[id].specifierText, id));
+                        }
+                    }
+                    extendExportSymbols(symbols, nestedSymbols);
+                }
+                return symbols;
+            }
+        }
+        function getMergedSymbol(symbol) {
+            var merged;
+            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
+        }
+        function getSymbolOfNode(node) {
+            return getMergedSymbol(node.symbol);
+        }
+        function getParentOfSymbol(symbol) {
+            return getMergedSymbol(symbol.parent);
+        }
+        function getExportSymbolOfValueSymbolIfExported(symbol) {
+            return symbol && (symbol.flags & 1048576) !== 0
+                ? getMergedSymbol(symbol.exportSymbol)
+                : symbol;
+        }
+        function symbolIsValue(symbol) {
+            if (symbol.flags & 16777216) {
+                return symbolIsValue(getSymbolLinks(symbol).target);
+            }
+            if (symbol.flags & 107455) {
+                return true;
+            }
+            if (symbol.flags & 8388608) {
+                return (resolveAlias(symbol).flags & 107455) !== 0;
+            }
+            return false;
+        }
+        function findConstructorDeclaration(node) {
+            var members = node.members;
+            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
+                var member = members_1[_i];
+                if (member.kind === 148 && ts.nodeIsPresent(member.body)) {
+                    return member;
+                }
+            }
+        }
+        function createType(flags) {
+            var result = new Type(checker, flags);
+            result.id = typeCount;
+            typeCount++;
+            return result;
+        }
+        function createIntrinsicType(kind, intrinsicName) {
+            var type = createType(kind);
+            type.intrinsicName = intrinsicName;
+            return type;
+        }
+        function createObjectType(kind, symbol) {
+            var type = createType(kind);
+            type.symbol = symbol;
+            return type;
+        }
+        function isReservedMemberName(name) {
+            return name.charCodeAt(0) === 95 &&
+                name.charCodeAt(1) === 95 &&
+                name.charCodeAt(2) !== 95 &&
+                name.charCodeAt(2) !== 64;
+        }
+        function getNamedMembers(members) {
+            var result;
+            for (var id in members) {
+                if (ts.hasProperty(members, id)) {
+                    if (!isReservedMemberName(id)) {
+                        if (!result)
+                            result = [];
+                        var symbol = members[id];
+                        if (symbolIsValue(symbol)) {
+                            result.push(symbol);
+                        }
+                    }
+                }
+            }
+            return result || emptyArray;
+        }
+        function setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            type.members = members;
+            type.properties = getNamedMembers(members);
+            type.callSignatures = callSignatures;
+            type.constructSignatures = constructSignatures;
+            if (stringIndexInfo)
+                type.stringIndexInfo = stringIndexInfo;
+            if (numberIndexInfo)
+                type.numberIndexInfo = numberIndexInfo;
+            return type;
+        }
+        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            return setObjectTypeMembers(createObjectType(65536, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
+            var result;
+            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
+                if (location_1.locals && !isGlobalSourceFile(location_1)) {
+                    if (result = callback(location_1.locals)) {
+                        return result;
+                    }
+                }
+                switch (location_1.kind) {
+                    case 256:
+                        if (!ts.isExternalOrCommonJsModule(location_1)) {
+                            break;
+                        }
+                    case 225:
+                        if (result = callback(getSymbolOfNode(location_1).exports)) {
+                            return result;
+                        }
+                        break;
+                }
+            }
+            return callback(globals);
+        }
+        function getQualifiedLeftMeaning(rightMeaning) {
+            return rightMeaning === 107455 ? 107455 : 1536;
+        }
+        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
+            function getAccessibleSymbolChainFromSymbolTable(symbols) {
+                function canQualifySymbol(symbolFromSymbolTable, meaning) {
+                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
+                        return true;
+                    }
+                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
+                    return !!accessibleParent;
+                }
+                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
+                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
+                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
+                            canQualifySymbol(symbolFromSymbolTable, meaning);
+                    }
+                }
+                if (isAccessible(ts.lookUp(symbols, symbol.name))) {
+                    return [symbol];
+                }
+                return ts.forEachValue(symbols, function (symbolFromSymbolTable) {
+                    if (symbolFromSymbolTable.flags & 8388608
+                        && symbolFromSymbolTable.name !== "export="
+                        && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238)) {
+                        if (!useOnlyExternalAliasing ||
+                            ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
+                            var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
+                            if (isAccessible(symbolFromSymbolTable, resolveAlias(symbolFromSymbolTable))) {
+                                return [symbolFromSymbolTable];
+                            }
+                            var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTable(resolvedImportedSymbol.exports) : undefined;
+                            if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
+                                return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
+                            }
+                        }
+                    }
+                });
+            }
+            if (symbol) {
+                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
+                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
+                }
+            }
+        }
+        function needsQualification(symbol, enclosingDeclaration, meaning) {
+            var qualify = false;
+            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
+                if (!ts.hasProperty(symbolTable, symbol.name)) {
+                    return false;
+                }
+                var symbolFromSymbolTable = symbolTable[symbol.name];
+                if (symbolFromSymbolTable === symbol) {
+                    return true;
+                }
+                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
+                if (symbolFromSymbolTable.flags & meaning) {
+                    qualify = true;
+                    return true;
+                }
+                return false;
+            });
+            return qualify;
+        }
+        function isPropertyOrMethodDeclarationSymbol(symbol) {
+            if (symbol.declarations && symbol.declarations.length) {
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    switch (declaration.kind) {
+                        case 145:
+                        case 147:
+                        case 149:
+                        case 150:
+                            continue;
+                        default:
+                            return false;
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function isSymbolAccessible(symbol, enclosingDeclaration, meaning) {
+            if (symbol && enclosingDeclaration && !(symbol.flags & 262144)) {
+                var initialSymbol = symbol;
+                var meaningToLook = meaning;
+                while (symbol) {
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, false);
+                    if (accessibleSymbolChain) {
+                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0]);
+                        if (!hasAccessibleDeclarations) {
+                            return {
+                                accessibility: 1,
+                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1536) : undefined
+                            };
+                        }
+                        return hasAccessibleDeclarations;
+                    }
+                    meaningToLook = getQualifiedLeftMeaning(meaning);
+                    symbol = getParentOfSymbol(symbol);
+                }
+                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
+                if (symbolExternalModule) {
+                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
+                    if (symbolExternalModule !== enclosingExternalModule) {
+                        return {
+                            accessibility: 2,
+                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                            errorModuleName: symbolToString(symbolExternalModule)
+                        };
+                    }
+                }
+                return {
+                    accessibility: 1,
+                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning)
+                };
+            }
+            return { accessibility: 0 };
+            function getExternalModuleContainer(declaration) {
+                for (; declaration; declaration = declaration.parent) {
+                    if (hasExternalModuleSymbol(declaration)) {
+                        return getSymbolOfNode(declaration);
+                    }
+                }
+            }
+        }
+        function hasExternalModuleSymbol(declaration) {
+            return ts.isAmbientModule(declaration) || (declaration.kind === 256 && ts.isExternalOrCommonJsModule(declaration));
+        }
+        function hasVisibleDeclarations(symbol) {
+            var aliasesToMakeVisible;
+            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
+                return undefined;
+            }
+            return { accessibility: 0, aliasesToMakeVisible: aliasesToMakeVisible };
+            function getIsDeclarationVisible(declaration) {
+                if (!isDeclarationVisible(declaration)) {
+                    var anyImportSyntax = getAnyImportSyntax(declaration);
+                    if (anyImportSyntax &&
+                        !(anyImportSyntax.flags & 1) &&
+                        isDeclarationVisible(anyImportSyntax.parent)) {
+                        getNodeLinks(declaration).isVisible = true;
+                        if (aliasesToMakeVisible) {
+                            if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
+                                aliasesToMakeVisible.push(anyImportSyntax);
+                            }
+                        }
+                        else {
+                            aliasesToMakeVisible = [anyImportSyntax];
+                        }
+                        return true;
+                    }
+                    return false;
+                }
+                return true;
+            }
+        }
+        function isEntityNameVisible(entityName, enclosingDeclaration) {
+            var meaning;
+            if (entityName.parent.kind === 158 || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                meaning = 107455 | 1048576;
+            }
+            else if (entityName.kind === 139 || entityName.kind === 172 ||
+                entityName.parent.kind === 229) {
+                meaning = 1536;
+            }
+            else {
+                meaning = 793056;
+            }
+            var firstIdentifier = getFirstIdentifier(entityName);
+            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, undefined, undefined);
+            return (symbol && hasVisibleDeclarations(symbol)) || {
+                accessibility: 1,
+                errorSymbolName: ts.getTextOfNode(firstIdentifier),
+                errorNode: firstIdentifier
+            };
+        }
+        function writeKeyword(writer, kind) {
+            writer.writeKeyword(ts.tokenToString(kind));
+        }
+        function writePunctuation(writer, kind) {
+            writer.writePunctuation(ts.tokenToString(kind));
+        }
+        function writeSpace(writer) {
+            writer.writeSpace(" ");
+        }
+        function symbolToString(symbol, enclosingDeclaration, meaning) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function signatureToString(signature, enclosingDeclaration, flags, kind) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function typeToString(type, enclosingDeclaration, flags) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            var maxLength = compilerOptions.noErrorTruncation || flags & 4 ? undefined : 100;
+            if (maxLength && result.length >= maxLength) {
+                result = result.substr(0, maxLength - "...".length) + "...";
+            }
+            return result;
+        }
+        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function visibilityToString(flags) {
+            if (flags === 8) {
+                return "private";
+            }
+            if (flags === 16) {
+                return "protected";
+            }
+            return "public";
+        }
+        function getTypeAliasForTypeLiteral(type) {
+            if (type.symbol && type.symbol.flags & 2048) {
+                var node = type.symbol.declarations[0].parent;
+                while (node.kind === 164) {
+                    node = node.parent;
+                }
+                if (node.kind === 223) {
+                    return getSymbolOfNode(node);
+                }
+            }
+            return undefined;
+        }
+        function isTopLevelInExternalModuleAugmentation(node) {
+            return node && node.parent &&
+                node.parent.kind === 226 &&
+                ts.isExternalModuleAugmentation(node.parent.parent);
+        }
+        function getSymbolDisplayBuilder() {
+            function getNameOfSymbol(symbol) {
+                if (symbol.declarations && symbol.declarations.length) {
+                    var declaration = symbol.declarations[0];
+                    if (declaration.name) {
+                        return ts.declarationNameToString(declaration.name);
+                    }
+                    switch (declaration.kind) {
+                        case 192:
+                            return "(Anonymous class)";
+                        case 179:
+                        case 180:
+                            return "(Anonymous function)";
+                    }
+                }
+                return symbol.name;
+            }
+            function appendSymbolNameOnly(symbol, writer) {
+                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
+            }
+            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
+                var symbolName = getNameOfSymbol(symbol);
+                var firstChar = symbolName.charCodeAt(0);
+                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
+                if (needsElementAccess) {
+                    writePunctuation(writer, 19);
+                    if (ts.isSingleOrDoubleQuote(firstChar)) {
+                        writer.writeStringLiteral(symbolName);
+                    }
+                    else {
+                        writer.writeSymbol(symbolName, symbol);
+                    }
+                    writePunctuation(writer, 20);
+                }
+                else {
+                    writePunctuation(writer, 21);
+                    writer.writeSymbol(symbolName, symbol);
+                }
+            }
+            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
+                var parentSymbol;
+                function appendParentTypeArgumentsAndSymbolName(symbol) {
+                    if (parentSymbol) {
+                        if (flags & 1) {
+                            if (symbol.flags & 16777216) {
+                                buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration);
+                            }
+                            else {
+                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
+                            }
+                        }
+                        appendPropertyOrElementAccessForSymbol(symbol, writer);
+                    }
+                    else {
+                        appendSymbolNameOnly(symbol, writer);
+                    }
+                    parentSymbol = symbol;
+                }
+                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
+                function walkSymbol(symbol, meaning) {
+                    if (symbol) {
+                        var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2));
+                        if (!accessibleSymbolChain ||
+                            needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
+                            walkSymbol(getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol), getQualifiedLeftMeaning(meaning));
+                        }
+                        if (accessibleSymbolChain) {
+                            for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
+                                var accessibleSymbol = accessibleSymbolChain_1[_i];
+                                appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
+                            }
+                        }
+                        else {
+                            if (!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) {
+                                return;
+                            }
+                            if (symbol.flags & 2048 || symbol.flags & 4096) {
+                                return;
+                            }
+                            appendParentTypeArgumentsAndSymbolName(symbol);
+                        }
+                    }
+                }
+                var isTypeParameter = symbol.flags & 262144;
+                var typeFormatFlag = 128 & typeFlags;
+                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
+                    walkSymbol(symbol, meaning);
+                    return;
+                }
+                return appendParentTypeArgumentsAndSymbolName(symbol);
+            }
+            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
+                var globalFlagsToPass = globalFlags & 16;
+                var inObjectTypeLiteral = false;
+                return writeType(type, globalFlags);
+                function writeType(type, flags) {
+                    if (type.flags & 150995071) {
+                        writer.writeKeyword(!(globalFlags & 16) && isTypeAny(type)
+                            ? "any"
+                            : type.intrinsicName);
+                    }
+                    else if (type.flags & 33554432) {
+                        if (inObjectTypeLiteral) {
+                            writer.reportInaccessibleThisError();
+                        }
+                        writer.writeKeyword("this");
+                    }
+                    else if (type.flags & 4096) {
+                        writeTypeReference(type, flags);
+                    }
+                    else if (type.flags & (1024 | 2048 | 128 | 512)) {
+                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793056, 0, flags);
+                    }
+                    else if (type.flags & 8192) {
+                        writeTupleType(type);
+                    }
+                    else if (type.flags & 49152) {
+                        writeUnionOrIntersectionType(type, flags);
+                    }
+                    else if (type.flags & 65536) {
+                        writeAnonymousType(type, flags);
+                    }
+                    else if (type.flags & 256) {
+                        writer.writeStringLiteral("\"" + ts.escapeString(type.text) + "\"");
+                    }
+                    else {
+                        writePunctuation(writer, 15);
+                        writeSpace(writer);
+                        writePunctuation(writer, 22);
+                        writeSpace(writer);
+                        writePunctuation(writer, 16);
+                    }
+                }
+                function writeTypeList(types, delimiter) {
+                    for (var i = 0; i < types.length; i++) {
+                        if (i > 0) {
+                            if (delimiter !== 24) {
+                                writeSpace(writer);
+                            }
+                            writePunctuation(writer, delimiter);
+                            writeSpace(writer);
+                        }
+                        writeType(types[i], delimiter === 24 ? 0 : 64);
+                    }
+                }
+                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
+                    if (symbol.flags & 32 || !isReservedMemberName(symbol.name)) {
+                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793056, 0, flags);
+                    }
+                    if (pos < end) {
+                        writePunctuation(writer, 25);
+                        writeType(typeArguments[pos], 256);
+                        pos++;
+                        while (pos < end) {
+                            writePunctuation(writer, 24);
+                            writeSpace(writer);
+                            writeType(typeArguments[pos], 0);
+                            pos++;
+                        }
+                        writePunctuation(writer, 27);
+                    }
+                }
+                function writeTypeReference(type, flags) {
+                    var typeArguments = type.typeArguments || emptyArray;
+                    if (type.target === globalArrayType && !(flags & 1)) {
+                        writeType(typeArguments[0], 64);
+                        writePunctuation(writer, 19);
+                        writePunctuation(writer, 20);
+                    }
+                    else {
+                        var outerTypeParameters = type.target.outerTypeParameters;
+                        var i = 0;
+                        if (outerTypeParameters) {
+                            var length_1 = outerTypeParameters.length;
+                            while (i < length_1) {
+                                var start = i;
+                                var parent_7 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
+                                do {
+                                    i++;
+                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_7);
+                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
+                                    writeSymbolTypeReference(parent_7, typeArguments, start, i, flags);
+                                    writePunctuation(writer, 21);
+                                }
+                            }
+                        }
+                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
+                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
+                    }
+                }
+                function writeTupleType(type) {
+                    writePunctuation(writer, 19);
+                    writeTypeList(type.elementTypes, 24);
+                    writePunctuation(writer, 20);
+                }
+                function writeUnionOrIntersectionType(type, flags) {
+                    if (flags & 64) {
+                        writePunctuation(writer, 17);
+                    }
+                    writeTypeList(type.types, type.flags & 16384 ? 47 : 46);
+                    if (flags & 64) {
+                        writePunctuation(writer, 18);
+                    }
+                }
+                function writeAnonymousType(type, flags) {
+                    var symbol = type.symbol;
+                    if (symbol) {
+                        if (symbol.flags & (32 | 384 | 512)) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (shouldWriteTypeOfFunctionSymbol()) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (ts.contains(symbolStack, symbol)) {
+                            var typeAlias = getTypeAliasForTypeLiteral(type);
+                            if (typeAlias) {
+                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793056, 0, flags);
+                            }
+                            else {
+                                writeKeyword(writer, 117);
+                            }
+                        }
+                        else {
+                            if (!symbolStack) {
+                                symbolStack = [];
+                            }
+                            symbolStack.push(symbol);
+                            writeLiteralType(type, flags);
+                            symbolStack.pop();
+                        }
+                    }
+                    else {
+                        writeLiteralType(type, flags);
+                    }
+                    function shouldWriteTypeOfFunctionSymbol() {
+                        var isStaticMethodSymbol = !!(symbol.flags & 8192 &&
+                            ts.forEach(symbol.declarations, function (declaration) { return declaration.flags & 32; }));
+                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16) &&
+                            (symbol.parent ||
+                                ts.forEach(symbol.declarations, function (declaration) {
+                                    return declaration.parent.kind === 256 || declaration.parent.kind === 226;
+                                }));
+                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
+                            return !!(flags & 2) ||
+                                (ts.contains(symbolStack, symbol));
+                        }
+                    }
+                }
+                function writeTypeOfSymbol(type, typeFormatFlags) {
+                    writeKeyword(writer, 101);
+                    writeSpace(writer);
+                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455, 0, typeFormatFlags);
+                }
+                function writeIndexSignature(info, keyword) {
+                    if (info) {
+                        if (info.isReadonly) {
+                            writeKeyword(writer, 128);
+                            writeSpace(writer);
+                        }
+                        writePunctuation(writer, 19);
+                        writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
+                        writePunctuation(writer, 54);
+                        writeSpace(writer);
+                        writeKeyword(writer, keyword);
+                        writePunctuation(writer, 20);
+                        writePunctuation(writer, 54);
+                        writeSpace(writer);
+                        writeType(info.type, 0);
+                        writePunctuation(writer, 23);
+                        writer.writeLine();
+                    }
+                }
+                function writePropertyWithModifiers(prop) {
+                    if (isReadonlySymbol(prop)) {
+                        writeKeyword(writer, 128);
+                        writeSpace(writer);
+                    }
+                    buildSymbolDisplay(prop, writer);
+                    if (prop.flags & 536870912) {
+                        writePunctuation(writer, 53);
+                    }
+                }
+                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
+                    if (flags & 64) {
+                        return true;
+                    }
+                    else if (flags & 256) {
+                        var typeParameters = callSignature.target && (flags & 32) ?
+                            callSignature.target.typeParameters : callSignature.typeParameters;
+                        return typeParameters && typeParameters.length !== 0;
+                    }
+                    return false;
+                }
+                function writeLiteralType(type, flags) {
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
+                            writePunctuation(writer, 15);
+                            writePunctuation(writer, 16);
+                            return;
+                        }
+                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
+                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 17);
+                            }
+                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8, undefined, symbolStack);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 18);
+                            }
+                            return;
+                        }
+                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
+                            if (flags & 64) {
+                                writePunctuation(writer, 17);
+                            }
+                            writeKeyword(writer, 92);
+                            writeSpace(writer);
+                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8, undefined, symbolStack);
+                            if (flags & 64) {
+                                writePunctuation(writer, 18);
+                            }
+                            return;
+                        }
+                    }
+                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
+                    inObjectTypeLiteral = true;
+                    writePunctuation(writer, 15);
+                    writer.writeLine();
+                    writer.increaseIndent();
+                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
+                        var signature = _a[_i];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, undefined, symbolStack);
+                        writePunctuation(writer, 23);
+                        writer.writeLine();
+                    }
+                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
+                        var signature = _c[_b];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1, symbolStack);
+                        writePunctuation(writer, 23);
+                        writer.writeLine();
+                    }
+                    writeIndexSignature(resolved.stringIndexInfo, 132);
+                    writeIndexSignature(resolved.numberIndexInfo, 130);
+                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
+                        var p = _e[_d];
+                        var t = getTypeOfSymbol(p);
+                        if (p.flags & (16 | 8192) && !getPropertiesOfObjectType(t).length) {
+                            var signatures = getSignaturesOfType(t, 0);
+                            for (var _f = 0, signatures_1 = signatures; _f < signatures_1.length; _f++) {
+                                var signature = signatures_1[_f];
+                                writePropertyWithModifiers(p);
+                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, undefined, symbolStack);
+                                writePunctuation(writer, 23);
+                                writer.writeLine();
+                            }
+                        }
+                        else {
+                            writePropertyWithModifiers(p);
+                            writePunctuation(writer, 54);
+                            writeSpace(writer);
+                            writeType(t, 0);
+                            writePunctuation(writer, 23);
+                            writer.writeLine();
+                        }
+                    }
+                    writer.decreaseIndent();
+                    writePunctuation(writer, 16);
+                    inObjectTypeLiteral = saveInObjectTypeLiteral;
+                }
+            }
+            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
+                var targetSymbol = getTargetSymbol(symbol);
+                if (targetSymbol.flags & 32 || targetSymbol.flags & 64 || targetSymbol.flags & 524288) {
+                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
+                }
+            }
+            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
+                appendSymbolNameOnly(tp.symbol, writer);
+                var constraint = getConstraintOfTypeParameter(tp);
+                if (constraint) {
+                    writeSpace(writer);
+                    writeKeyword(writer, 83);
+                    writeSpace(writer);
+                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
+                }
+            }
+            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
+                var parameterNode = p.valueDeclaration;
+                if (ts.isRestParameter(parameterNode)) {
+                    writePunctuation(writer, 22);
+                }
+                if (ts.isBindingPattern(parameterNode.name)) {
+                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    appendSymbolNameOnly(p, writer);
+                }
+                if (isOptionalParameter(parameterNode)) {
+                    writePunctuation(writer, 53);
+                }
+                writePunctuation(writer, 54);
+                writeSpace(writer);
+                buildTypeDisplay(getTypeOfSymbol(p), writer, enclosingDeclaration, flags, symbolStack);
+            }
+            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
+                if (bindingPattern.kind === 167) {
+                    writePunctuation(writer, 15);
+                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 16);
+                }
+                else if (bindingPattern.kind === 168) {
+                    writePunctuation(writer, 19);
+                    var elements = bindingPattern.elements;
+                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    if (elements && elements.hasTrailingComma) {
+                        writePunctuation(writer, 24);
+                    }
+                    writePunctuation(writer, 20);
+                }
+            }
+            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
+                if (bindingElement.kind === 193) {
+                    return;
+                }
+                ts.Debug.assert(bindingElement.kind === 169);
+                if (bindingElement.propertyName) {
+                    writer.writeSymbol(ts.getTextOfNode(bindingElement.propertyName), bindingElement.symbol);
+                    writePunctuation(writer, 54);
+                    writeSpace(writer);
+                }
+                if (ts.isBindingPattern(bindingElement.name)) {
+                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    if (bindingElement.dotDotDotToken) {
+                        writePunctuation(writer, 22);
+                    }
+                    appendSymbolNameOnly(bindingElement.symbol, writer);
+                }
+            }
+            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 25);
+                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 27);
+                }
+            }
+            function buildDisplayForCommaSeparatedList(list, writer, action) {
+                for (var i = 0; i < list.length; i++) {
+                    if (i > 0) {
+                        writePunctuation(writer, 24);
+                        writeSpace(writer);
+                    }
+                    action(list[i]);
+                }
+            }
+            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration, flags, symbolStack) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 25);
+                    var flags_1 = 256;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (i > 0) {
+                            writePunctuation(writer, 24);
+                            writeSpace(writer);
+                            flags_1 = 0;
+                        }
+                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags_1);
+                    }
+                    writePunctuation(writer, 27);
+                }
+            }
+            function buildDisplayForParametersAndDelimiters(thisType, parameters, writer, enclosingDeclaration, flags, symbolStack) {
+                writePunctuation(writer, 17);
+                if (thisType) {
+                    writeKeyword(writer, 97);
+                    writePunctuation(writer, 54);
+                    writeSpace(writer);
+                    buildTypeDisplay(thisType, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                for (var i = 0; i < parameters.length; i++) {
+                    if (i > 0 || thisType) {
+                        writePunctuation(writer, 24);
+                        writeSpace(writer);
+                    }
+                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
+                }
+                writePunctuation(writer, 18);
+            }
+            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    writer.writeParameter(predicate.parameterName);
+                }
+                else {
+                    writeKeyword(writer, 97);
+                }
+                writeSpace(writer);
+                writeKeyword(writer, 124);
+                writeSpace(writer);
+                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
+            }
+            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
+                if (flags & 8) {
+                    writeSpace(writer);
+                    writePunctuation(writer, 34);
+                }
+                else {
+                    writePunctuation(writer, 54);
+                }
+                writeSpace(writer);
+                if (signature.typePredicate) {
+                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    var returnType = getReturnTypeOfSignature(signature);
+                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
+                }
+            }
+            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
+                if (kind === 1) {
+                    writeKeyword(writer, 92);
+                    writeSpace(writer);
+                }
+                if (signature.target && (flags & 32)) {
+                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
+                }
+                else {
+                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                buildDisplayForParametersAndDelimiters(signature.thisType, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
+                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
+            }
+            return _displayBuilder || (_displayBuilder = {
+                buildSymbolDisplay: buildSymbolDisplay,
+                buildTypeDisplay: buildTypeDisplay,
+                buildTypeParameterDisplay: buildTypeParameterDisplay,
+                buildTypePredicateDisplay: buildTypePredicateDisplay,
+                buildParameterDisplay: buildParameterDisplay,
+                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
+                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
+                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
+                buildSignatureDisplay: buildSignatureDisplay,
+                buildReturnTypeDisplay: buildReturnTypeDisplay
+            });
+        }
+        function isDeclarationVisible(node) {
+            if (node) {
+                var links = getNodeLinks(node);
+                if (links.isVisible === undefined) {
+                    links.isVisible = !!determineIfDeclarationIsVisible();
+                }
+                return links.isVisible;
+            }
+            return false;
+            function determineIfDeclarationIsVisible() {
+                switch (node.kind) {
+                    case 169:
+                        return isDeclarationVisible(node.parent.parent);
+                    case 218:
+                        if (ts.isBindingPattern(node.name) &&
+                            !node.name.elements.length) {
+                            return false;
+                        }
+                    case 225:
+                    case 221:
+                    case 222:
+                    case 223:
+                    case 220:
+                    case 224:
+                    case 229:
+                        if (ts.isExternalModuleAugmentation(node)) {
+                            return true;
+                        }
+                        var parent_8 = getDeclarationContainer(node);
+                        if (!(ts.getCombinedNodeFlags(node) & 1) &&
+                            !(node.kind !== 229 && parent_8.kind !== 256 && ts.isInAmbientContext(parent_8))) {
+                            return isGlobalSourceFile(parent_8);
+                        }
+                        return isDeclarationVisible(parent_8);
+                    case 145:
+                    case 144:
+                    case 149:
+                    case 150:
+                    case 147:
+                    case 146:
+                        if (node.flags & (8 | 16)) {
+                            return false;
+                        }
+                    case 148:
+                    case 152:
+                    case 151:
+                    case 153:
+                    case 142:
+                    case 226:
+                    case 156:
+                    case 157:
+                    case 159:
+                    case 155:
+                    case 160:
+                    case 161:
+                    case 162:
+                    case 163:
+                    case 164:
+                        return isDeclarationVisible(node.parent);
+                    case 231:
+                    case 232:
+                    case 234:
+                        return false;
+                    case 141:
+                    case 256:
+                        return true;
+                    case 235:
+                        return false;
+                    default:
+                        return false;
+                }
+            }
+        }
+        function collectLinkedAliases(node) {
+            var exportSymbol;
+            if (node.parent && node.parent.kind === 235) {
+                exportSymbol = resolveName(node.parent, node.text, 107455 | 793056 | 1536 | 8388608, ts.Diagnostics.Cannot_find_name_0, node);
+            }
+            else if (node.parent.kind === 238) {
+                var exportSpecifier = node.parent;
+                exportSymbol = exportSpecifier.parent.parent.moduleSpecifier ?
+                    getExternalModuleMember(exportSpecifier.parent.parent, exportSpecifier) :
+                    resolveEntityName(exportSpecifier.propertyName || exportSpecifier.name, 107455 | 793056 | 1536 | 8388608);
+            }
+            var result = [];
+            if (exportSymbol) {
+                buildVisibleNodeList(exportSymbol.declarations);
+            }
+            return result;
+            function buildVisibleNodeList(declarations) {
+                ts.forEach(declarations, function (declaration) {
+                    getNodeLinks(declaration).isVisible = true;
+                    var resultNode = getAnyImportSyntax(declaration) || declaration;
+                    if (!ts.contains(result, resultNode)) {
+                        result.push(resultNode);
+                    }
+                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
+                        var internalModuleReference = declaration.moduleReference;
+                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
+                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 | 793056 | 1536, undefined, undefined);
+                        if (importSymbol) {
+                            buildVisibleNodeList(importSymbol.declarations);
+                        }
+                    }
+                });
+            }
+        }
+        function pushTypeResolution(target, propertyName) {
+            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
+            if (resolutionCycleStartIndex >= 0) {
+                var length_2 = resolutionTargets.length;
+                for (var i = resolutionCycleStartIndex; i < length_2; i++) {
+                    resolutionResults[i] = false;
+                }
+                return false;
+            }
+            resolutionTargets.push(target);
+            resolutionResults.push(true);
+            resolutionPropertyNames.push(propertyName);
+            return true;
+        }
+        function findResolutionCycleStartIndex(target, propertyName) {
+            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
+                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
+                    return -1;
+                }
+                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+        function hasType(target, propertyName) {
+            if (propertyName === 0) {
+                return getSymbolLinks(target).type;
+            }
+            if (propertyName === 2) {
+                return getSymbolLinks(target).declaredType;
+            }
+            if (propertyName === 1) {
+                ts.Debug.assert(!!(target.flags & 1024));
+                return target.resolvedBaseConstructorType;
+            }
+            if (propertyName === 3) {
+                return target.resolvedReturnType;
+            }
+            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
+        }
+        function popTypeResolution() {
+            resolutionTargets.pop();
+            resolutionPropertyNames.pop();
+            return resolutionResults.pop();
+        }
+        function getDeclarationContainer(node) {
+            node = ts.getRootDeclaration(node);
+            while (node) {
+                switch (node.kind) {
+                    case 218:
+                    case 219:
+                    case 234:
+                    case 233:
+                    case 232:
+                    case 231:
+                        node = node.parent;
+                        break;
+                    default:
+                        return node.parent;
+                }
+            }
+        }
+        function getTypeOfPrototypeProperty(prototype) {
+            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
+            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
+        }
+        function getTypeOfPropertyOfType(type, name) {
+            var prop = getPropertyOfType(type, name);
+            return prop ? getTypeOfSymbol(prop) : undefined;
+        }
+        function isTypeAny(type) {
+            return type && (type.flags & 1) !== 0;
+        }
+        function getTypeForBindingElementParent(node) {
+            var symbol = getSymbolOfNode(node);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, false);
+        }
+        function getTextOfPropertyName(name) {
+            switch (name.kind) {
+                case 69:
+                    return name.text;
+                case 9:
+                case 8:
+                    return name.text;
+                case 140:
+                    if (ts.isStringOrNumericLiteral(name.expression.kind)) {
+                        return name.expression.text;
+                    }
+            }
+            return undefined;
+        }
+        function isComputedNonLiteralName(name) {
+            return name.kind === 140 && !ts.isStringOrNumericLiteral(name.expression.kind);
+        }
+        function getTypeForBindingElement(declaration) {
+            var pattern = declaration.parent;
+            var parentType = getTypeForBindingElementParent(pattern.parent);
+            if (parentType === unknownType) {
+                return unknownType;
+            }
+            if (!parentType || isTypeAny(parentType)) {
+                if (declaration.initializer) {
+                    return checkExpressionCached(declaration.initializer);
+                }
+                return parentType;
+            }
+            var type;
+            if (pattern.kind === 167) {
+                var name_11 = declaration.propertyName || declaration.name;
+                if (isComputedNonLiteralName(name_11)) {
+                    return anyType;
+                }
+                if (declaration.initializer) {
+                    getContextualType(declaration.initializer);
+                }
+                var text = getTextOfPropertyName(name_11);
+                type = getTypeOfPropertyOfType(parentType, text) ||
+                    isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1) ||
+                    getIndexTypeOfType(parentType, 0);
+                if (!type) {
+                    error(name_11, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_11));
+                    return unknownType;
+                }
+            }
+            else {
+                var elementType = checkIteratedTypeOrElementType(parentType, pattern, false);
+                if (!declaration.dotDotDotToken) {
+                    var propName = "" + ts.indexOf(pattern.elements, declaration);
+                    type = isTupleLikeType(parentType)
+                        ? getTypeOfPropertyOfType(parentType, propName)
+                        : elementType;
+                    if (!type) {
+                        if (isTupleType(parentType)) {
+                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), parentType.elementTypes.length, pattern.elements.length);
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
+                        }
+                        return unknownType;
+                    }
+                }
+                else {
+                    type = createArrayType(elementType);
+                }
+            }
+            if (strictNullChecks && declaration.initializer && !(getCombinedTypeFlags(checkExpressionCached(declaration.initializer)) & 32)) {
+                type = getTypeWithFacts(type, 131072);
+            }
+            return type;
+        }
+        function getTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
+            var jsDocType = getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration);
+            if (jsDocType) {
+                return getTypeFromTypeNode(jsDocType);
+            }
+        }
+        function getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
+            var typeTag = ts.getJSDocTypeTag(declaration);
+            if (typeTag && typeTag.typeExpression) {
+                return typeTag.typeExpression.type;
+            }
+            if (declaration.kind === 218 &&
+                declaration.parent.kind === 219 &&
+                declaration.parent.parent.kind === 200) {
+                var annotation = ts.getJSDocTypeTag(declaration.parent.parent);
+                if (annotation && annotation.typeExpression) {
+                    return annotation.typeExpression.type;
+                }
+            }
+            else if (declaration.kind === 142) {
+                var paramTag = ts.getCorrespondingJSDocParameterTag(declaration);
+                if (paramTag && paramTag.typeExpression) {
+                    return paramTag.typeExpression.type;
+                }
+            }
+            return undefined;
+        }
+        function addOptionality(type, optional) {
+            return strictNullChecks && optional ? addTypeKind(type, 32) : type;
+        }
+        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
+            if (declaration.flags & 134217728) {
+                var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            if (declaration.parent.parent.kind === 207) {
+                return stringType;
+            }
+            if (declaration.parent.parent.kind === 208) {
+                return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType;
+            }
+            if (ts.isBindingPattern(declaration.parent)) {
+                return getTypeForBindingElement(declaration);
+            }
+            if (declaration.type) {
+                return addOptionality(getTypeFromTypeNode(declaration.type), declaration.questionToken && includeOptionality);
+            }
+            if (declaration.kind === 142) {
+                var func = declaration.parent;
+                if (func.kind === 150 && !ts.hasDynamicName(func)) {
+                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149);
+                    if (getter) {
+                        var signature = getSignatureFromDeclaration(getter);
+                        var thisParameter = getAccessorThisParameter(func);
+                        if (thisParameter && declaration === thisParameter) {
+                            return signature.thisType;
+                        }
+                        return getReturnTypeOfSignature(signature);
+                    }
+                }
+                var type = declaration.symbol.name === "this"
+                    ? getContextuallyTypedThisType(func)
+                    : getContextuallyTypedParameterType(declaration);
+                if (type) {
+                    return addOptionality(type, declaration.questionToken && includeOptionality);
+                }
+            }
+            if (declaration.initializer) {
+                return addOptionality(checkExpressionCached(declaration.initializer), declaration.questionToken && includeOptionality);
+            }
+            if (declaration.kind === 254) {
+                return checkIdentifier(declaration.name);
+            }
+            if (ts.isBindingPattern(declaration.name)) {
+                return getTypeFromBindingPattern(declaration.name, false);
+            }
+            return undefined;
+        }
+        function getTypeFromBindingElement(element, includePatternInType) {
+            if (element.initializer) {
+                var type = checkExpressionCached(element.initializer);
+                reportErrorsFromWidening(element, type);
+                return getWidenedType(type);
+            }
+            if (ts.isBindingPattern(element.name)) {
+                return getTypeFromBindingPattern(element.name, includePatternInType);
+            }
+            if (compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
+                reportImplicitAnyError(element, anyType);
+            }
+            return anyType;
+        }
+        function getTypeFromObjectBindingPattern(pattern, includePatternInType) {
+            var members = {};
+            var hasComputedProperties = false;
+            ts.forEach(pattern.elements, function (e) {
+                var name = e.propertyName || e.name;
+                if (isComputedNonLiteralName(name)) {
+                    hasComputedProperties = true;
+                    return;
+                }
+                var text = getTextOfPropertyName(name);
+                var flags = 4 | 67108864 | (e.initializer ? 536870912 : 0);
+                var symbol = createSymbol(flags, text);
+                symbol.type = getTypeFromBindingElement(e, includePatternInType);
+                symbol.bindingElement = e;
+                members[symbol.name] = symbol;
+            });
+            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined);
+            if (includePatternInType) {
+                result.pattern = pattern;
+            }
+            if (hasComputedProperties) {
+                result.flags |= 67108864;
+            }
+            return result;
+        }
+        function getTypeFromArrayBindingPattern(pattern, includePatternInType) {
+            var elements = pattern.elements;
+            if (elements.length === 0 || elements[elements.length - 1].dotDotDotToken) {
+                return languageVersion >= 2 ? createIterableType(anyType) : anyArrayType;
+            }
+            var elementTypes = ts.map(elements, function (e) { return e.kind === 193 ? anyType : getTypeFromBindingElement(e, includePatternInType); });
+            if (includePatternInType) {
+                var result = createNewTupleType(elementTypes);
+                result.pattern = pattern;
+                return result;
+            }
+            return createTupleType(elementTypes);
+        }
+        function getTypeFromBindingPattern(pattern, includePatternInType) {
+            return pattern.kind === 167
+                ? getTypeFromObjectBindingPattern(pattern, includePatternInType)
+                : getTypeFromArrayBindingPattern(pattern, includePatternInType);
+        }
+        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
+            var type = getTypeForVariableLikeDeclaration(declaration, true);
+            if (type) {
+                if (reportErrors) {
+                    reportErrorsFromWidening(declaration, type);
+                }
+                if (declaration.kind === 253) {
+                    return type;
+                }
+                return getWidenedType(type);
+            }
+            type = declaration.dotDotDotToken ? anyArrayType : anyType;
+            if (reportErrors && compilerOptions.noImplicitAny) {
+                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
+                    reportImplicitAnyError(declaration, type);
+                }
+            }
+            return type;
+        }
+        function declarationBelongsToPrivateAmbientMember(declaration) {
+            var root = ts.getRootDeclaration(declaration);
+            var memberDeclaration = root.kind === 142 ? root.parent : root;
+            return isPrivateWithinAmbient(memberDeclaration);
+        }
+        function getTypeOfVariableOrParameterOrProperty(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                if (symbol.flags & 134217728) {
+                    return links.type = getTypeOfPrototypeProperty(symbol);
+                }
+                var declaration = symbol.valueDeclaration;
+                if (declaration.parent.kind === 252) {
+                    return links.type = anyType;
+                }
+                if (declaration.kind === 235) {
+                    return links.type = checkExpression(declaration.expression);
+                }
+                if (declaration.kind === 187) {
+                    return links.type = getUnionType(ts.map(symbol.declarations, function (decl) { return checkExpressionCached(decl.right); }));
+                }
+                if (declaration.kind === 172) {
+                    if (declaration.parent.kind === 187) {
+                        return links.type = checkExpressionCached(declaration.parent.right);
+                    }
+                }
+                if (!pushTypeResolution(symbol, 0)) {
+                    return unknownType;
+                }
+                var type = getWidenedTypeForVariableLikeDeclaration(declaration, true);
+                if (!popTypeResolution()) {
+                    if (symbol.valueDeclaration.type) {
+                        type = unknownType;
+                        error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
+                    }
+                    else {
+                        type = anyType;
+                        if (compilerOptions.noImplicitAny) {
+                            error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
+                        }
+                    }
+                }
+                links.type = type;
+            }
+            return links.type;
+        }
+        function getAnnotatedAccessorType(accessor) {
+            if (accessor) {
+                if (accessor.kind === 149) {
+                    return accessor.type && getTypeFromTypeNode(accessor.type);
+                }
+                else {
+                    var setterTypeAnnotation = ts.getSetAccessorTypeAnnotationNode(accessor);
+                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
+                }
+            }
+            return undefined;
+        }
+        function getAnnotatedAccessorThisType(accessor) {
+            if (accessor) {
+                var parameter = getAccessorThisParameter(accessor);
+                if (parameter && parameter.type) {
+                    return getTypeFromTypeNode(accessor.parameters[0].type);
+                }
+            }
+            return undefined;
+        }
+        function getTypeOfAccessors(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var getter = ts.getDeclarationOfKind(symbol, 149);
+                var setter = ts.getDeclarationOfKind(symbol, 150);
+                if (getter && getter.flags & 134217728) {
+                    var jsDocType = getTypeForVariableLikeDeclarationFromJSDocComment(getter);
+                    if (jsDocType) {
+                        return links.type = jsDocType;
+                    }
+                }
+                if (!pushTypeResolution(symbol, 0)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                var getterReturnType = getAnnotatedAccessorType(getter);
+                if (getterReturnType) {
+                    type = getterReturnType;
+                }
+                else {
+                    var setterParameterType = getAnnotatedAccessorType(setter);
+                    if (setterParameterType) {
+                        type = setterParameterType;
+                    }
+                    else {
+                        if (getter && getter.body) {
+                            type = getReturnTypeFromBody(getter);
+                        }
+                        else {
+                            if (compilerOptions.noImplicitAny) {
+                                error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation, symbolToString(symbol));
+                            }
+                            type = anyType;
+                        }
+                    }
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (compilerOptions.noImplicitAny) {
+                        var getter_1 = ts.getDeclarationOfKind(symbol, 149);
+                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
+                    }
+                }
+                links.type = type;
+            }
+            return links.type;
+        }
+        function getTypeOfFuncClassEnumModule(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var type = createObjectType(65536, symbol);
+                links.type = strictNullChecks && symbol.flags & 536870912 ?
+                    addTypeKind(type, 32) : type;
+            }
+            return links.type;
+        }
+        function getTypeOfEnumMember(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                links.type = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
+            }
+            return links.type;
+        }
+        function getTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var targetSymbol = resolveAlias(symbol);
+                links.type = targetSymbol.flags & 107455
+                    ? getTypeOfSymbol(targetSymbol)
+                    : unknownType;
+            }
+            return links.type;
+        }
+        function getTypeOfInstantiatedSymbol(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                links.type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
+            }
+            return links.type;
+        }
+        function getTypeOfSymbol(symbol) {
+            if (symbol.flags & 16777216) {
+                return getTypeOfInstantiatedSymbol(symbol);
+            }
+            if (symbol.flags & (3 | 4)) {
+                return getTypeOfVariableOrParameterOrProperty(symbol);
+            }
+            if (symbol.flags & (16 | 8192 | 32 | 384 | 512)) {
+                return getTypeOfFuncClassEnumModule(symbol);
+            }
+            if (symbol.flags & 8) {
+                return getTypeOfEnumMember(symbol);
+            }
+            if (symbol.flags & 98304) {
+                return getTypeOfAccessors(symbol);
+            }
+            if (symbol.flags & 8388608) {
+                return getTypeOfAlias(symbol);
+            }
+            return unknownType;
+        }
+        function getTargetType(type) {
+            return type.flags & 4096 ? type.target : type;
+        }
+        function hasBaseType(type, checkBase) {
+            return check(type);
+            function check(type) {
+                var target = getTargetType(type);
+                return target === checkBase || ts.forEach(getBaseTypes(target), check);
+            }
+        }
+        function appendTypeParameters(typeParameters, declarations) {
+            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
+                var declaration = declarations_2[_i];
+                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
+                if (!typeParameters) {
+                    typeParameters = [tp];
+                }
+                else if (!ts.contains(typeParameters, tp)) {
+                    typeParameters.push(tp);
+                }
+            }
+            return typeParameters;
+        }
+        function appendOuterTypeParameters(typeParameters, node) {
+            while (true) {
+                node = node.parent;
+                if (!node) {
+                    return typeParameters;
+                }
+                if (node.kind === 221 || node.kind === 192 ||
+                    node.kind === 220 || node.kind === 179 ||
+                    node.kind === 147 || node.kind === 180) {
+                    var declarations = node.typeParameters;
+                    if (declarations) {
+                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
+                    }
+                }
+            }
+        }
+        function getOuterTypeParametersOfClassOrInterface(symbol) {
+            var declaration = symbol.flags & 32 ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222);
+            return appendOuterTypeParameters(undefined, declaration);
+        }
+        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
+            var result;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var node = _a[_i];
+                if (node.kind === 222 || node.kind === 221 ||
+                    node.kind === 192 || node.kind === 223) {
+                    var declaration = node;
+                    if (declaration.typeParameters) {
+                        result = appendTypeParameters(result, declaration.typeParameters);
+                    }
+                }
+            }
+            return result;
+        }
+        function getTypeParametersOfClassOrInterface(symbol) {
+            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
+        }
+        function isConstructorType(type) {
+            return type.flags & 80896 && getSignaturesOfType(type, 1).length > 0;
+        }
+        function getBaseTypeNodeOfClass(type) {
+            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
+        }
+        function getConstructorsForTypeArguments(type, typeArgumentNodes) {
+            var typeArgCount = typeArgumentNodes ? typeArgumentNodes.length : 0;
+            return ts.filter(getSignaturesOfType(type, 1), function (sig) { return (sig.typeParameters ? sig.typeParameters.length : 0) === typeArgCount; });
+        }
+        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes) {
+            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes);
+            if (typeArgumentNodes) {
+                var typeArguments_1 = ts.map(typeArgumentNodes, getTypeFromTypeNode);
+                signatures = ts.map(signatures, function (sig) { return getSignatureInstantiation(sig, typeArguments_1); });
+            }
+            return signatures;
+        }
+        function getBaseConstructorTypeOfClass(type) {
+            if (!type.resolvedBaseConstructorType) {
+                var baseTypeNode = getBaseTypeNodeOfClass(type);
+                if (!baseTypeNode) {
+                    return type.resolvedBaseConstructorType = undefinedType;
+                }
+                if (!pushTypeResolution(type, 1)) {
+                    return unknownType;
+                }
+                var baseConstructorType = checkExpression(baseTypeNode.expression);
+                if (baseConstructorType.flags & 80896) {
+                    resolveStructuredTypeMembers(baseConstructorType);
+                }
+                if (!popTypeResolution()) {
+                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                if (baseConstructorType !== unknownType && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
+                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                type.resolvedBaseConstructorType = baseConstructorType;
+            }
+            return type.resolvedBaseConstructorType;
+        }
+        function getBaseTypes(type) {
+            var isClass = type.symbol.flags & 32;
+            var isInterface = type.symbol.flags & 64;
+            if (!type.resolvedBaseTypes) {
+                if (!isClass && !isInterface) {
+                    ts.Debug.fail("type must be class or interface");
+                }
+                if (isClass) {
+                    resolveBaseTypesOfClass(type);
+                }
+                if (isInterface) {
+                    resolveBaseTypesOfInterface(type);
+                }
+            }
+            return type.resolvedBaseTypes;
+        }
+        function resolveBaseTypesOfClass(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            var baseConstructorType = getBaseConstructorTypeOfClass(type);
+            if (!(baseConstructorType.flags & 80896)) {
+                return;
+            }
+            var baseTypeNode = getBaseTypeNodeOfClass(type);
+            var baseType;
+            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
+            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 &&
+                areAllOuterTypeParametersApplied(originalBaseType)) {
+                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol);
+            }
+            else {
+                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments);
+                if (!constructors.length) {
+                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
+                    return;
+                }
+                baseType = getReturnTypeOfSignature(constructors[0]);
+            }
+            if (baseType === unknownType) {
+                return;
+            }
+            if (!(getTargetType(baseType).flags & (1024 | 2048))) {
+                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
+                return;
+            }
+            if (type === baseType || hasBaseType(baseType, type)) {
+                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 1));
+                return;
+            }
+            if (type.resolvedBaseTypes === emptyArray) {
+                type.resolvedBaseTypes = [baseType];
+            }
+            else {
+                type.resolvedBaseTypes.push(baseType);
+            }
+        }
+        function areAllOuterTypeParametersApplied(type) {
+            var outerTypeParameters = type.outerTypeParameters;
+            if (outerTypeParameters) {
+                var last = outerTypeParameters.length - 1;
+                var typeArguments = type.typeArguments;
+                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
+            }
+            return true;
+        }
+        function resolveBaseTypesOfInterface(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 222 && ts.getInterfaceBaseTypeNodes(declaration)) {
+                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
+                        var node = _c[_b];
+                        var baseType = getTypeFromTypeNode(node);
+                        if (baseType !== unknownType) {
+                            if (getTargetType(baseType).flags & (1024 | 2048)) {
+                                if (type !== baseType && !hasBaseType(baseType, type)) {
+                                    if (type.resolvedBaseTypes === emptyArray) {
+                                        type.resolvedBaseTypes = [baseType];
+                                    }
+                                    else {
+                                        type.resolvedBaseTypes.push(baseType);
+                                    }
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 1));
+                                }
+                            }
+                            else {
+                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        function isIndependentInterface(symbol) {
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 222) {
+                    if (declaration.flags & 16384) {
+                        return false;
+                    }
+                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
+                    if (baseTypeNodes) {
+                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
+                            var node = baseTypeNodes_1[_b];
+                            if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                                var baseSymbol = resolveEntityName(node.expression, 793056, true);
+                                if (!baseSymbol || !(baseSymbol.flags & 64) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
+                                    return false;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            return true;
+        }
+        function getDeclaredTypeOfClassOrInterface(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var kind = symbol.flags & 32 ? 1024 : 2048;
+                var type = links.declaredType = createObjectType(kind, symbol);
+                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
+                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                if (outerTypeParameters || localTypeParameters || kind === 1024 || !isIndependentInterface(symbol)) {
+                    type.flags |= 4096;
+                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
+                    type.outerTypeParameters = outerTypeParameters;
+                    type.localTypeParameters = localTypeParameters;
+                    type.instantiations = {};
+                    type.instantiations[getTypeListId(type.typeParameters)] = type;
+                    type.target = type;
+                    type.typeArguments = type.typeParameters;
+                    type.thisType = createType(512 | 33554432);
+                    type.thisType.symbol = symbol;
+                    type.thisType.constraint = type;
+                }
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfTypeAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                if (!pushTypeResolution(symbol, 2)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                var declaration = ts.getDeclarationOfKind(symbol, 279);
+                if (declaration) {
+                    if (declaration.jsDocTypeLiteral) {
+                        type = getTypeFromTypeNode(declaration.jsDocTypeLiteral);
+                    }
+                    else {
+                        type = getTypeFromTypeNode(declaration.typeExpression.type);
+                    }
+                }
+                else {
+                    declaration = ts.getDeclarationOfKind(symbol, 223);
+                    type = getTypeFromTypeNode(declaration.type);
+                }
+                if (popTypeResolution()) {
+                    links.typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                    if (links.typeParameters) {
+                        links.instantiations = {};
+                        links.instantiations[getTypeListId(links.typeParameters)] = type;
+                    }
+                }
+                else {
+                    type = unknownType;
+                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
+                }
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfEnum(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var type = createType(128);
+                type.symbol = symbol;
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfTypeParameter(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var type = createType(512);
+                type.symbol = symbol;
+                if (!ts.getDeclarationOfKind(symbol, 141).constraint) {
+                    type.constraint = noConstraintType;
+                }
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfSymbol(symbol) {
+            ts.Debug.assert((symbol.flags & 16777216) === 0);
+            if (symbol.flags & (32 | 64)) {
+                return getDeclaredTypeOfClassOrInterface(symbol);
+            }
+            if (symbol.flags & 524288) {
+                return getDeclaredTypeOfTypeAlias(symbol);
+            }
+            if (symbol.flags & 384) {
+                return getDeclaredTypeOfEnum(symbol);
+            }
+            if (symbol.flags & 262144) {
+                return getDeclaredTypeOfTypeParameter(symbol);
+            }
+            if (symbol.flags & 8388608) {
+                return getDeclaredTypeOfAlias(symbol);
+            }
+            return unknownType;
+        }
+        function isIndependentTypeReference(node) {
+            if (node.typeArguments) {
+                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
+                    var typeNode = _a[_i];
+                    if (!isIndependentType(typeNode)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function isIndependentType(node) {
+            switch (node.kind) {
+                case 117:
+                case 132:
+                case 130:
+                case 120:
+                case 133:
+                case 103:
+                case 135:
+                case 93:
+                case 127:
+                case 166:
+                    return true;
+                case 160:
+                    return isIndependentType(node.elementType);
+                case 155:
+                    return isIndependentTypeReference(node);
+            }
+            return false;
+        }
+        function isIndependentVariableLikeDeclaration(node) {
+            return node.type && isIndependentType(node.type) || !node.type && !node.initializer;
+        }
+        function isIndependentFunctionLikeDeclaration(node) {
+            if (node.kind !== 148 && (!node.type || !isIndependentType(node.type))) {
+                return false;
+            }
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                if (!isIndependentVariableLikeDeclaration(parameter)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        function isIndependentMember(symbol) {
+            if (symbol.declarations && symbol.declarations.length === 1) {
+                var declaration = symbol.declarations[0];
+                if (declaration) {
+                    switch (declaration.kind) {
+                        case 145:
+                        case 144:
+                            return isIndependentVariableLikeDeclaration(declaration);
+                        case 147:
+                        case 146:
+                        case 148:
+                            return isIndependentFunctionLikeDeclaration(declaration);
+                    }
+                }
+            }
+            return false;
+        }
+        function createSymbolTable(symbols) {
+            var result = {};
+            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
+                var symbol = symbols_1[_i];
+                result[symbol.name] = symbol;
+            }
+            return result;
+        }
+        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
+            var result = {};
+            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
+                var symbol = symbols_2[_i];
+                result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper);
+            }
+            return result;
+        }
+        function addInheritedMembers(symbols, baseSymbols) {
+            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
+                var s = baseSymbols_1[_i];
+                if (!ts.hasProperty(symbols, s.name)) {
+                    symbols[s.name] = s;
+                }
+            }
+        }
+        function resolveDeclaredMembers(type) {
+            if (!type.declaredProperties) {
+                var symbol = type.symbol;
+                type.declaredProperties = getNamedMembers(symbol.members);
+                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members["__call"]);
+                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members["__new"]);
+                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
+                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
+            }
+            return type;
+        }
+        function getTypeWithThisArgument(type, thisArgument) {
+            if (type.flags & 4096) {
+                return createTypeReference(type.target, ts.concatenate(type.typeArguments, [thisArgument || type.target.thisType]));
+            }
+            return type;
+        }
+        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
+            var mapper = identityMapper;
+            var members = source.symbol.members;
+            var callSignatures = source.declaredCallSignatures;
+            var constructSignatures = source.declaredConstructSignatures;
+            var stringIndexInfo = source.declaredStringIndexInfo;
+            var numberIndexInfo = source.declaredNumberIndexInfo;
+            if (!ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
+                mapper = createTypeMapper(typeParameters, typeArguments);
+                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, typeParameters.length === 1);
+                callSignatures = instantiateList(source.declaredCallSignatures, mapper, instantiateSignature);
+                constructSignatures = instantiateList(source.declaredConstructSignatures, mapper, instantiateSignature);
+                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
+                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
+            }
+            var baseTypes = getBaseTypes(source);
+            if (baseTypes.length) {
+                if (members === source.symbol.members) {
+                    members = createSymbolTable(source.declaredProperties);
+                }
+                var thisArgument = ts.lastOrUndefined(typeArguments);
+                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
+                    var baseType = baseTypes_1[_i];
+                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
+                    addInheritedMembers(members, getPropertiesOfObjectType(instantiatedBaseType));
+                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0));
+                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1));
+                    stringIndexInfo = stringIndexInfo || getIndexInfoOfType(instantiatedBaseType, 0);
+                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1);
+                }
+            }
+            setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function resolveClassOrInterfaceMembers(type) {
+            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
+        }
+        function resolveTypeReferenceMembers(type) {
+            var source = resolveDeclaredMembers(type.target);
+            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
+            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
+                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
+            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
+        }
+        function createSignature(declaration, typeParameters, thisType, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasStringLiterals) {
+            var sig = new Signature(checker);
+            sig.declaration = declaration;
+            sig.typeParameters = typeParameters;
+            sig.parameters = parameters;
+            sig.thisType = thisType;
+            sig.resolvedReturnType = resolvedReturnType;
+            sig.typePredicate = typePredicate;
+            sig.minArgumentCount = minArgumentCount;
+            sig.hasRestParameter = hasRestParameter;
+            sig.hasStringLiterals = hasStringLiterals;
+            return sig;
+        }
+        function cloneSignature(sig) {
+            return createSignature(sig.declaration, sig.typeParameters, sig.thisType, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasStringLiterals);
+        }
+        function getDefaultConstructSignatures(classType) {
+            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+            var baseSignatures = getSignaturesOfType(baseConstructorType, 1);
+            if (baseSignatures.length === 0) {
+                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, undefined, 0, false, false)];
+            }
+            var baseTypeNode = getBaseTypeNodeOfClass(classType);
+            var typeArguments = ts.map(baseTypeNode.typeArguments, getTypeFromTypeNode);
+            var typeArgCount = typeArguments ? typeArguments.length : 0;
+            var result = [];
+            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
+                var baseSig = baseSignatures_1[_i];
+                var typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
+                if (typeParamCount === typeArgCount) {
+                    var sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
+                    sig.typeParameters = classType.localTypeParameters;
+                    sig.resolvedReturnType = classType;
+                    result.push(sig);
+                }
+            }
+            return result;
+        }
+        function createTupleTypeMemberSymbols(memberTypes) {
+            var members = {};
+            for (var i = 0; i < memberTypes.length; i++) {
+                var symbol = createSymbol(4 | 67108864, "" + i);
+                symbol.type = memberTypes[i];
+                members[i] = symbol;
+            }
+            return members;
+        }
+        function resolveTupleTypeMembers(type) {
+            var arrayElementType = getUnionType(type.elementTypes, true);
+            var arrayType = resolveStructuredTypeMembers(createTypeFromGenericGlobalType(globalArrayType, [arrayElementType, type]));
+            var members = createTupleTypeMemberSymbols(type.elementTypes);
+            addInheritedMembers(members, arrayType.properties);
+            setObjectTypeMembers(type, members, arrayType.callSignatures, arrayType.constructSignatures, arrayType.stringIndexInfo, arrayType.numberIndexInfo);
+        }
+        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
+            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
+                var s = signatureList_1[_i];
+                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
+                    return s;
+                }
+            }
+        }
+        function findMatchingSignatures(signatureLists, signature, listIndex) {
+            if (signature.typeParameters) {
+                if (listIndex > 0) {
+                    return undefined;
+                }
+                for (var i = 1; i < signatureLists.length; i++) {
+                    if (!findMatchingSignature(signatureLists[i], signature, false, false, false)) {
+                        return undefined;
+                    }
+                }
+                return [signature];
+            }
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, true, true, true);
+                if (!match) {
+                    return undefined;
+                }
+                if (!ts.contains(result, match)) {
+                    (result || (result = [])).push(match);
+                }
+            }
+            return result;
+        }
+        function getUnionSignatures(types, kind) {
+            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
+                    var signature = _a[_i];
+                    if (!result || !findMatchingSignature(result, signature, false, true, true)) {
+                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
+                        if (unionSignatures) {
+                            var s = signature;
+                            if (unionSignatures.length > 1) {
+                                s = cloneSignature(signature);
+                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisType; })) {
+                                    s.thisType = getUnionType(ts.map(unionSignatures, function (sig) { return sig.thisType || anyType; }));
+                                }
+                                s.resolvedReturnType = undefined;
+                                s.unionSignatures = unionSignatures;
+                            }
+                            (result || (result = [])).push(s);
+                        }
+                    }
+                }
+            }
+            return result || emptyArray;
+        }
+        function getUnionIndexInfo(types, kind) {
+            var indexTypes = [];
+            var isAnyReadonly = false;
+            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
+                var type = types_1[_i];
+                var indexInfo = getIndexInfoOfType(type, kind);
+                if (!indexInfo) {
+                    return undefined;
+                }
+                indexTypes.push(indexInfo.type);
+                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
+            }
+            return createIndexInfo(getUnionType(indexTypes), isAnyReadonly);
+        }
+        function resolveUnionTypeMembers(type) {
+            var callSignatures = getUnionSignatures(type.types, 0);
+            var constructSignatures = getUnionSignatures(type.types, 1);
+            var stringIndexInfo = getUnionIndexInfo(type.types, 0);
+            var numberIndexInfo = getUnionIndexInfo(type.types, 1);
+            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function intersectTypes(type1, type2) {
+            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
+        }
+        function intersectIndexInfos(info1, info2) {
+            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
+        }
+        function resolveIntersectionTypeMembers(type) {
+            var callSignatures = emptyArray;
+            var constructSignatures = emptyArray;
+            var stringIndexInfo = undefined;
+            var numberIndexInfo = undefined;
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0));
+                constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(t, 1));
+                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0));
+                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1));
+            }
+            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function resolveAnonymousTypeMembers(type) {
+            var symbol = type.symbol;
+            if (type.target) {
+                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, false);
+                var callSignatures = instantiateList(getSignaturesOfType(type.target, 0), type.mapper, instantiateSignature);
+                var constructSignatures = instantiateList(getSignaturesOfType(type.target, 1), type.mapper, instantiateSignature);
+                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0), type.mapper);
+                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1), type.mapper);
+                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else if (symbol.flags & 2048) {
+                var members = symbol.members;
+                var callSignatures = getSignaturesOfSymbol(members["__call"]);
+                var constructSignatures = getSignaturesOfSymbol(members["__new"]);
+                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
+                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
+                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else {
+                var members = emptySymbols;
+                var constructSignatures = emptyArray;
+                if (symbol.flags & 1952) {
+                    members = getExportsOfSymbol(symbol);
+                }
+                if (symbol.flags & 32) {
+                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
+                    constructSignatures = getSignaturesOfSymbol(symbol.members["__constructor"]);
+                    if (!constructSignatures.length) {
+                        constructSignatures = getDefaultConstructSignatures(classType);
+                    }
+                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+                    if (baseConstructorType.flags & 80896) {
+                        members = createSymbolTable(getNamedMembers(members));
+                        addInheritedMembers(members, getPropertiesOfObjectType(baseConstructorType));
+                    }
+                }
+                var numberIndexInfo = symbol.flags & 384 ? enumNumberIndexInfo : undefined;
+                setObjectTypeMembers(type, members, emptyArray, constructSignatures, undefined, numberIndexInfo);
+                if (symbol.flags & (16 | 8192)) {
+                    type.callSignatures = getSignaturesOfSymbol(symbol);
+                }
+            }
+        }
+        function resolveStructuredTypeMembers(type) {
+            if (!type.members) {
+                if (type.flags & 4096) {
+                    resolveTypeReferenceMembers(type);
+                }
+                else if (type.flags & (1024 | 2048)) {
+                    resolveClassOrInterfaceMembers(type);
+                }
+                else if (type.flags & 65536) {
+                    resolveAnonymousTypeMembers(type);
+                }
+                else if (type.flags & 8192) {
+                    resolveTupleTypeMembers(type);
+                }
+                else if (type.flags & 16384) {
+                    resolveUnionTypeMembers(type);
+                }
+                else if (type.flags & 32768) {
+                    resolveIntersectionTypeMembers(type);
+                }
+            }
+            return type;
+        }
+        function getPropertiesOfObjectType(type) {
+            if (type.flags & 80896) {
+                return resolveStructuredTypeMembers(type).properties;
+            }
+            return emptyArray;
+        }
+        function getPropertyOfObjectType(type, name) {
+            if (type.flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (ts.hasProperty(resolved.members, name)) {
+                    var symbol = resolved.members[name];
+                    if (symbolIsValue(symbol)) {
+                        return symbol;
+                    }
+                }
+            }
+        }
+        function getPropertiesOfUnionOrIntersectionType(type) {
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var current = _a[_i];
+                for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
+                    var prop = _c[_b];
+                    getPropertyOfUnionOrIntersectionType(type, prop.name);
+                }
+                if (type.flags & 16384) {
+                    break;
+                }
+            }
+            return type.resolvedProperties ? symbolsToArray(type.resolvedProperties) : emptyArray;
+        }
+        function getPropertiesOfType(type) {
+            type = getApparentType(type);
+            return type.flags & 49152 ? getPropertiesOfUnionOrIntersectionType(type) : getPropertiesOfObjectType(type);
+        }
+        function getApparentTypeOfTypeParameter(type) {
+            if (!type.resolvedApparentType) {
+                var constraintType = getConstraintOfTypeParameter(type);
+                while (constraintType && constraintType.flags & 512) {
+                    constraintType = getConstraintOfTypeParameter(constraintType);
+                }
+                type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type);
+            }
+            return type.resolvedApparentType;
+        }
+        function getApparentType(type) {
+            if (type.flags & 512) {
+                type = getApparentTypeOfTypeParameter(type);
+            }
+            if (type.flags & 258) {
+                type = globalStringType;
+            }
+            else if (type.flags & 132) {
+                type = globalNumberType;
+            }
+            else if (type.flags & 8) {
+                type = globalBooleanType;
+            }
+            else if (type.flags & 16777216) {
+                type = getGlobalESSymbolType();
+            }
+            return type;
+        }
+        function createUnionOrIntersectionProperty(containingType, name) {
+            var types = containingType.types;
+            var props;
+            var commonFlags = (containingType.flags & 32768) ? 536870912 : 0;
+            for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
+                var current = types_2[_i];
+                var type = getApparentType(current);
+                if (type !== unknownType) {
+                    var prop = getPropertyOfType(type, name);
+                    if (prop && !(getDeclarationFlagsFromSymbol(prop) & (8 | 16))) {
+                        commonFlags &= prop.flags;
+                        if (!props) {
+                            props = [prop];
+                        }
+                        else if (!ts.contains(props, prop)) {
+                            props.push(prop);
+                        }
+                    }
+                    else if (containingType.flags & 16384) {
+                        return undefined;
+                    }
+                }
+            }
+            if (!props) {
+                return undefined;
+            }
+            if (props.length === 1) {
+                return props[0];
+            }
+            var propTypes = [];
+            var declarations = [];
+            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
+                var prop = props_1[_a];
+                if (prop.declarations) {
+                    ts.addRange(declarations, prop.declarations);
+                }
+                propTypes.push(getTypeOfSymbol(prop));
+            }
+            var result = createSymbol(4 |
+                67108864 |
+                268435456 |
+                commonFlags, name);
+            result.containingType = containingType;
+            result.declarations = declarations;
+            result.type = containingType.flags & 16384 ? getUnionType(propTypes) : getIntersectionType(propTypes);
+            return result;
+        }
+        function getPropertyOfUnionOrIntersectionType(type, name) {
+            var properties = type.resolvedProperties || (type.resolvedProperties = {});
+            if (ts.hasProperty(properties, name)) {
+                return properties[name];
+            }
+            var property = createUnionOrIntersectionProperty(type, name);
+            if (property) {
+                properties[name] = property;
+            }
+            return property;
+        }
+        function getPropertyOfType(type, name) {
+            type = getApparentType(type);
+            if (type.flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (ts.hasProperty(resolved.members, name)) {
+                    var symbol = resolved.members[name];
+                    if (symbolIsValue(symbol)) {
+                        return symbol;
+                    }
+                }
+                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
+                    var symbol = getPropertyOfObjectType(globalFunctionType, name);
+                    if (symbol) {
+                        return symbol;
+                    }
+                }
+                return getPropertyOfObjectType(globalObjectType, name);
+            }
+            if (type.flags & 49152) {
+                return getPropertyOfUnionOrIntersectionType(type, name);
+            }
+            return undefined;
+        }
+        function getSignaturesOfStructuredType(type, kind) {
+            if (type.flags & 130048) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 ? resolved.callSignatures : resolved.constructSignatures;
+            }
+            return emptyArray;
+        }
+        function getSignaturesOfType(type, kind) {
+            return getSignaturesOfStructuredType(getApparentType(type), kind);
+        }
+        function getIndexInfoOfStructuredType(type, kind) {
+            if (type.flags & 130048) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 ? resolved.stringIndexInfo : resolved.numberIndexInfo;
+            }
+        }
+        function getIndexTypeOfStructuredType(type, kind) {
+            var info = getIndexInfoOfStructuredType(type, kind);
+            return info && info.type;
+        }
+        function getIndexInfoOfType(type, kind) {
+            return getIndexInfoOfStructuredType(getApparentType(type), kind);
+        }
+        function getIndexTypeOfType(type, kind) {
+            return getIndexTypeOfStructuredType(getApparentType(type), kind);
+        }
+        function getImplicitIndexTypeOfType(type, kind) {
+            if (isObjectLiteralType(type)) {
+                var propTypes = [];
+                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 || isNumericLiteralName(prop.name)) {
+                        propTypes.push(getTypeOfSymbol(prop));
+                    }
+                }
+                if (propTypes.length) {
+                    return getUnionType(propTypes);
+                }
+            }
+            return undefined;
+        }
+        function getTypeParametersFromJSDocTemplate(declaration) {
+            if (declaration.flags & 134217728) {
+                var templateTag = ts.getJSDocTemplateTag(declaration);
+                if (templateTag) {
+                    return getTypeParametersFromDeclaration(templateTag.typeParameters);
+                }
+            }
+            return undefined;
+        }
+        function getTypeParametersFromDeclaration(typeParameterDeclarations) {
+            var result = [];
+            ts.forEach(typeParameterDeclarations, function (node) {
+                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
+                if (!ts.contains(result, tp)) {
+                    result.push(tp);
+                }
+            });
+            return result;
+        }
+        function symbolsToArray(symbols) {
+            var result = [];
+            for (var id in symbols) {
+                if (!isReservedMemberName(id)) {
+                    result.push(symbols[id]);
+                }
+            }
+            return result;
+        }
+        function isOptionalParameter(node) {
+            if (node.flags & 134217728) {
+                if (node.type && node.type.kind === 268) {
+                    return true;
+                }
+                var paramTag = ts.getCorrespondingJSDocParameterTag(node);
+                if (paramTag) {
+                    if (paramTag.isBracketed) {
+                        return true;
+                    }
+                    if (paramTag.typeExpression) {
+                        return paramTag.typeExpression.type.kind === 268;
+                    }
+                }
+            }
+            if (ts.hasQuestionToken(node)) {
+                return true;
+            }
+            if (node.initializer) {
+                var signatureDeclaration = node.parent;
+                var signature = getSignatureFromDeclaration(signatureDeclaration);
+                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
+                ts.Debug.assert(parameterIndex >= 0);
+                return parameterIndex >= signature.minArgumentCount;
+            }
+            return false;
+        }
+        function createTypePredicateFromTypePredicateNode(node) {
+            if (node.parameterName.kind === 69) {
+                var parameterName = node.parameterName;
+                return {
+                    kind: 1,
+                    parameterName: parameterName ? parameterName.text : undefined,
+                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
+                    type: getTypeFromTypeNode(node.type)
+                };
+            }
+            else {
+                return {
+                    kind: 0,
+                    type: getTypeFromTypeNode(node.type)
+                };
+            }
+        }
+        function getSignatureFromDeclaration(declaration) {
+            var links = getNodeLinks(declaration);
+            if (!links.resolvedSignature) {
+                var parameters = [];
+                var hasStringLiterals = false;
+                var minArgumentCount = -1;
+                var thisType = undefined;
+                var hasThisParameter = void 0;
+                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
+                for (var i = isJSConstructSignature ? 1 : 0, n = declaration.parameters.length; i < n; i++) {
+                    var param = declaration.parameters[i];
+                    var paramSymbol = param.symbol;
+                    if (paramSymbol && !!(paramSymbol.flags & 4) && !ts.isBindingPattern(param.name)) {
+                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455, undefined, undefined);
+                        paramSymbol = resolvedSymbol;
+                    }
+                    if (i === 0 && paramSymbol.name === "this") {
+                        hasThisParameter = true;
+                        thisType = param.type ? getTypeFromTypeNode(param.type) : unknownType;
+                    }
+                    else {
+                        parameters.push(paramSymbol);
+                    }
+                    if (param.type && param.type.kind === 166) {
+                        hasStringLiterals = true;
+                    }
+                    if (param.initializer || param.questionToken || param.dotDotDotToken) {
+                        if (minArgumentCount < 0) {
+                            minArgumentCount = i - (hasThisParameter ? 1 : 0);
+                        }
+                    }
+                    else {
+                        minArgumentCount = -1;
+                    }
+                }
+                if ((declaration.kind === 149 || declaration.kind === 150) &&
+                    !ts.hasDynamicName(declaration) &&
+                    (!hasThisParameter || thisType === unknownType)) {
+                    var otherKind = declaration.kind === 149 ? 150 : 149;
+                    var setter = ts.getDeclarationOfKind(declaration.symbol, otherKind);
+                    thisType = getAnnotatedAccessorThisType(setter);
+                }
+                if (minArgumentCount < 0) {
+                    minArgumentCount = declaration.parameters.length - (hasThisParameter ? 1 : 0);
+                }
+                if (isJSConstructSignature) {
+                    minArgumentCount--;
+                }
+                var classType = declaration.kind === 148 ?
+                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
+                    : undefined;
+                var typeParameters = classType ? classType.localTypeParameters :
+                    declaration.typeParameters ? getTypeParametersFromDeclaration(declaration.typeParameters) :
+                        getTypeParametersFromJSDocTemplate(declaration);
+                var returnType = getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType);
+                var typePredicate = declaration.type && declaration.type.kind === 154 ?
+                    createTypePredicateFromTypePredicateNode(declaration.type) :
+                    undefined;
+                links.resolvedSignature = createSignature(declaration, typeParameters, thisType, parameters, returnType, typePredicate, minArgumentCount, ts.hasRestParameter(declaration), hasStringLiterals);
+            }
+            return links.resolvedSignature;
+        }
+        function getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType) {
+            if (isJSConstructSignature) {
+                return getTypeFromTypeNode(declaration.parameters[0].type);
+            }
+            else if (classType) {
+                return classType;
+            }
+            else if (declaration.type) {
+                return getTypeFromTypeNode(declaration.type);
+            }
+            if (declaration.flags & 134217728) {
+                var type = getReturnTypeFromJSDocComment(declaration);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            if (declaration.kind === 149 && !ts.hasDynamicName(declaration)) {
+                var setter = ts.getDeclarationOfKind(declaration.symbol, 150);
+                return getAnnotatedAccessorType(setter);
+            }
+            if (ts.nodeIsMissing(declaration.body)) {
+                return anyType;
+            }
+        }
+        function getSignaturesOfSymbol(symbol) {
+            if (!symbol)
+                return emptyArray;
+            var result = [];
+            for (var i = 0, len = symbol.declarations.length; i < len; i++) {
+                var node = symbol.declarations[i];
+                switch (node.kind) {
+                    case 156:
+                    case 157:
+                    case 220:
+                    case 147:
+                    case 146:
+                    case 148:
+                    case 151:
+                    case 152:
+                    case 153:
+                    case 149:
+                    case 150:
+                    case 179:
+                    case 180:
+                    case 269:
+                        if (i > 0 && node.body) {
+                            var previous = symbol.declarations[i - 1];
+                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
+                                break;
+                            }
+                        }
+                        result.push(getSignatureFromDeclaration(node));
+                }
+            }
+            return result;
+        }
+        function resolveExternalModuleTypeByLiteral(name) {
+            var moduleSym = resolveExternalModuleName(name, name);
+            if (moduleSym) {
+                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
+                if (resolvedModuleSymbol) {
+                    return getTypeOfSymbol(resolvedModuleSymbol);
+                }
+            }
+            return anyType;
+        }
+        function getReturnTypeOfSignature(signature) {
+            if (!signature.resolvedReturnType) {
+                if (!pushTypeResolution(signature, 3)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                if (signature.target) {
+                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
+                }
+                else if (signature.unionSignatures) {
+                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature));
+                }
+                else {
+                    type = getReturnTypeFromBody(signature.declaration);
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (compilerOptions.noImplicitAny) {
+                        var declaration = signature.declaration;
+                        if (declaration.name) {
+                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
+                        }
+                    }
+                }
+                signature.resolvedReturnType = type;
+            }
+            return signature.resolvedReturnType;
+        }
+        function getRestTypeOfSignature(signature) {
+            if (signature.hasRestParameter) {
+                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
+                if (type.flags & 4096 && type.target === globalArrayType) {
+                    return type.typeArguments[0];
+                }
+            }
+            return anyType;
+        }
+        function getSignatureInstantiation(signature, typeArguments) {
+            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), true);
+        }
+        function getErasedSignature(signature) {
+            if (!signature.typeParameters)
+                return signature;
+            if (!signature.erasedSignatureCache) {
+                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), true);
+            }
+            return signature.erasedSignatureCache;
+        }
+        function getOrCreateTypeFromSignature(signature) {
+            if (!signature.isolatedSignatureType) {
+                var isConstructor = signature.declaration.kind === 148 || signature.declaration.kind === 152;
+                var type = createObjectType(65536 | 262144);
+                type.members = emptySymbols;
+                type.properties = emptyArray;
+                type.callSignatures = !isConstructor ? [signature] : emptyArray;
+                type.constructSignatures = isConstructor ? [signature] : emptyArray;
+                signature.isolatedSignatureType = type;
+            }
+            return signature.isolatedSignatureType;
+        }
+        function getIndexSymbol(symbol) {
+            return symbol.members["__index"];
+        }
+        function getIndexDeclarationOfSymbol(symbol, kind) {
+            var syntaxKind = kind === 1 ? 130 : 132;
+            var indexSymbol = getIndexSymbol(symbol);
+            if (indexSymbol) {
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var node = decl;
+                    if (node.parameters.length === 1) {
+                        var parameter = node.parameters[0];
+                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
+                            return node;
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function createIndexInfo(type, isReadonly, declaration) {
+            return { type: type, isReadonly: isReadonly, declaration: declaration };
+        }
+        function getIndexInfoOfSymbol(symbol, kind) {
+            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
+            if (declaration) {
+                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (declaration.flags & 64) !== 0, declaration);
+            }
+            return undefined;
+        }
+        function getConstraintDeclaration(type) {
+            return ts.getDeclarationOfKind(type.symbol, 141).constraint;
+        }
+        function hasConstraintReferenceTo(type, target) {
+            var checked;
+            while (type && !(type.flags & 33554432) && type.flags & 512 && !ts.contains(checked, type)) {
+                if (type === target) {
+                    return true;
+                }
+                (checked || (checked = [])).push(type);
+                var constraintDeclaration = getConstraintDeclaration(type);
+                type = constraintDeclaration && getTypeFromTypeNode(constraintDeclaration);
+            }
+            return false;
+        }
+        function getConstraintOfTypeParameter(typeParameter) {
+            if (!typeParameter.constraint) {
+                if (typeParameter.target) {
+                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
+                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
+                }
+                else {
+                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
+                    var constraint = getTypeFromTypeNode(constraintDeclaration);
+                    if (hasConstraintReferenceTo(constraint, typeParameter)) {
+                        error(constraintDeclaration, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
+                        constraint = unknownType;
+                    }
+                    typeParameter.constraint = constraint;
+                }
+            }
+            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
+        }
+        function getParentSymbolOfTypeParameter(typeParameter) {
+            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 141).parent);
+        }
+        function getTypeListId(types) {
+            if (types) {
+                switch (types.length) {
+                    case 1:
+                        return "" + types[0].id;
+                    case 2:
+                        return types[0].id + "," + types[1].id;
+                    default:
+                        var result = "";
+                        for (var i = 0; i < types.length; i++) {
+                            if (i > 0) {
+                                result += ",";
+                            }
+                            result += types[i].id;
+                        }
+                        return result;
+                }
+            }
+            return "";
+        }
+        function getPropagatingFlagsOfTypes(types, excludeKinds) {
+            var result = 0;
+            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
+                var type = types_3[_i];
+                if (!(type.flags & excludeKinds)) {
+                    result |= type.flags;
+                }
+            }
+            return result & 14680064;
+        }
+        function createTypeReference(target, typeArguments) {
+            var id = getTypeListId(typeArguments);
+            var type = target.instantiations[id];
+            if (!type) {
+                var propagatedFlags = typeArguments ? getPropagatingFlagsOfTypes(typeArguments, 0) : 0;
+                var flags = 4096 | propagatedFlags;
+                type = target.instantiations[id] = createObjectType(flags, target.symbol);
+                type.target = target;
+                type.typeArguments = typeArguments;
+            }
+            return type;
+        }
+        function getTypeFromClassOrInterfaceReference(node, symbol) {
+            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
+            var typeParameters = type.localTypeParameters;
+            if (typeParameters) {
+                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
+                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, typeToString(type, undefined, 1), typeParameters.length);
+                    return unknownType;
+                }
+                return createTypeReference(type, ts.concatenate(type.outerTypeParameters, ts.map(node.typeArguments, getTypeFromTypeNode)));
+            }
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
+                return unknownType;
+            }
+            return type;
+        }
+        function getTypeFromTypeAliasReference(node, symbol) {
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var links = getSymbolLinks(symbol);
+            var typeParameters = links.typeParameters;
+            if (typeParameters) {
+                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
+                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, symbolToString(symbol), typeParameters.length);
+                    return unknownType;
+                }
+                var typeArguments = ts.map(node.typeArguments, getTypeFromTypeNode);
+                var id = getTypeListId(typeArguments);
+                return links.instantiations[id] || (links.instantiations[id] = instantiateType(type, createTypeMapper(typeParameters, typeArguments)));
+            }
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return type;
+        }
+        function getTypeFromNonGenericTypeReference(node, symbol) {
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return getDeclaredTypeOfSymbol(symbol);
+        }
+        function getTypeReferenceName(node) {
+            switch (node.kind) {
+                case 155:
+                    return node.typeName;
+                case 267:
+                    return node.name;
+                case 194:
+                    if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                        return node.expression;
+                    }
+            }
+            return undefined;
+        }
+        function resolveTypeReferenceName(node, typeReferenceName) {
+            if (!typeReferenceName) {
+                return unknownSymbol;
+            }
+            return resolveEntityName(typeReferenceName, 793056) || unknownSymbol;
+        }
+        function getTypeReferenceType(node, symbol) {
+            if (symbol === unknownSymbol) {
+                return unknownType;
+            }
+            if (symbol.flags & (32 | 64)) {
+                return getTypeFromClassOrInterfaceReference(node, symbol);
+            }
+            if (symbol.flags & 524288) {
+                return getTypeFromTypeAliasReference(node, symbol);
+            }
+            if (symbol.flags & 107455 && node.kind === 267) {
+                return getTypeOfSymbol(symbol);
+            }
+            return getTypeFromNonGenericTypeReference(node, symbol);
+        }
+        function getTypeFromTypeReference(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var symbol = void 0;
+                var type = void 0;
+                if (node.kind === 267) {
+                    var typeReferenceName = getTypeReferenceName(node);
+                    symbol = resolveTypeReferenceName(node, typeReferenceName);
+                    type = getTypeReferenceType(node, symbol);
+                    links.resolvedSymbol = symbol;
+                    links.resolvedType = type;
+                }
+                else {
+                    var typeNameOrExpression = node.kind === 155 ? node.typeName :
+                        ts.isSupportedExpressionWithTypeArguments(node) ? node.expression :
+                            undefined;
+                    symbol = typeNameOrExpression && resolveEntityName(typeNameOrExpression, 793056) || unknownSymbol;
+                    type = symbol === unknownSymbol ? unknownType :
+                        symbol.flags & (32 | 64) ? getTypeFromClassOrInterfaceReference(node, symbol) :
+                            symbol.flags & 524288 ? getTypeFromTypeAliasReference(node, symbol) :
+                                getTypeFromNonGenericTypeReference(node, symbol);
+                }
+                links.resolvedSymbol = symbol;
+                links.resolvedType = type;
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeQueryNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getWidenedType(checkExpression(node.exprName));
+            }
+            return links.resolvedType;
+        }
+        function getTypeOfGlobalSymbol(symbol, arity) {
+            function getTypeDeclaration(symbol) {
+                var declarations = symbol.declarations;
+                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
+                    var declaration = declarations_3[_i];
+                    switch (declaration.kind) {
+                        case 221:
+                        case 222:
+                        case 224:
+                            return declaration;
+                    }
+                }
+            }
+            if (!symbol) {
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            var type = getDeclaredTypeOfSymbol(symbol);
+            if (!(type.flags & 80896)) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            if ((type.typeParameters ? type.typeParameters.length : 0) !== arity) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            return type;
+        }
+        function getGlobalValueSymbol(name) {
+            return getGlobalSymbol(name, 107455, ts.Diagnostics.Cannot_find_global_value_0);
+        }
+        function getGlobalTypeSymbol(name) {
+            return getGlobalSymbol(name, 793056, ts.Diagnostics.Cannot_find_global_type_0);
+        }
+        function getGlobalSymbol(name, meaning, diagnostic) {
+            return resolveName(undefined, name, meaning, diagnostic, name);
+        }
+        function getGlobalType(name, arity) {
+            if (arity === void 0) { arity = 0; }
+            return getTypeOfGlobalSymbol(getGlobalTypeSymbol(name), arity);
+        }
+        function getExportedTypeFromNamespace(namespace, name) {
+            var namespaceSymbol = getGlobalSymbol(namespace, 1536, undefined);
+            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793056);
+            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
+        }
+        function createTypedPropertyDescriptorType(propertyType) {
+            var globalTypedPropertyDescriptorType = getGlobalTypedPropertyDescriptorType();
+            return globalTypedPropertyDescriptorType !== emptyGenericType
+                ? createTypeReference(globalTypedPropertyDescriptorType, [propertyType])
+                : emptyObjectType;
+        }
+        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
+            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
+        }
+        function createIterableType(elementType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableType(), [elementType]);
+        }
+        function createIterableIteratorType(elementType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(), [elementType]);
+        }
+        function createArrayType(elementType) {
+            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
+        }
+        function getTypeFromArrayTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
+            }
+            return links.resolvedType;
+        }
+        function createTupleType(elementTypes) {
+            var id = getTypeListId(elementTypes);
+            return tupleTypes[id] || (tupleTypes[id] = createNewTupleType(elementTypes));
+        }
+        function createNewTupleType(elementTypes) {
+            var propagatedFlags = getPropagatingFlagsOfTypes(elementTypes, 0);
+            var type = createObjectType(8192 | propagatedFlags);
+            type.elementTypes = elementTypes;
+            return type;
+        }
+        function getTypeFromTupleTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNode));
+            }
+            return links.resolvedType;
+        }
+        function addTypeToSet(typeSet, type, typeSetKind) {
+            if (type.flags & typeSetKind) {
+                addTypesToSet(typeSet, type.types, typeSetKind);
+            }
+            else if (type.flags & (1 | 32 | 64)) {
+                if (type.flags & 1)
+                    typeSet.containsAny = true;
+                if (type.flags & 32)
+                    typeSet.containsUndefined = true;
+                if (type.flags & 64)
+                    typeSet.containsNull = true;
+                if (!(type.flags & 2097152))
+                    typeSet.containsNonWideningType = true;
+            }
+            else if (type !== neverType && !ts.contains(typeSet, type)) {
+                typeSet.push(type);
+            }
+        }
+        function addTypesToSet(typeSet, types, typeSetKind) {
+            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
+                var type = types_4[_i];
+                addTypeToSet(typeSet, type, typeSetKind);
+            }
+        }
+        function isSubtypeOfAny(candidate, types) {
+            for (var i = 0, len = types.length; i < len; i++) {
+                if (candidate !== types[i] && isTypeSubtypeOf(candidate, types[i])) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function removeSubtypes(types) {
+            var i = types.length;
+            while (i > 0) {
+                i--;
+                if (isSubtypeOfAny(types[i], types)) {
+                    types.splice(i, 1);
+                }
+            }
+        }
+        function getUnionType(types, noSubtypeReduction) {
+            if (types.length === 0) {
+                return neverType;
+            }
+            if (types.length === 1) {
+                return types[0];
+            }
+            var typeSet = [];
+            addTypesToSet(typeSet, types, 16384);
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (strictNullChecks) {
+                if (typeSet.containsNull)
+                    typeSet.push(nullType);
+                if (typeSet.containsUndefined)
+                    typeSet.push(undefinedType);
+            }
+            if (!noSubtypeReduction) {
+                removeSubtypes(typeSet);
+            }
+            if (typeSet.length === 0) {
+                return typeSet.containsNull ? typeSet.containsNonWideningType ? nullType : nullWideningType :
+                    typeSet.containsUndefined ? typeSet.containsNonWideningType ? undefinedType : undefinedWideningType :
+                        neverType;
+            }
+            else if (typeSet.length === 1) {
+                return typeSet[0];
+            }
+            var id = getTypeListId(typeSet);
+            var type = unionTypes[id];
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, 96);
+                type = unionTypes[id] = createObjectType(16384 | propagatedFlags);
+                type.types = typeSet;
+            }
+            return type;
+        }
+        function getTypeFromUnionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), true);
+            }
+            return links.resolvedType;
+        }
+        function getIntersectionType(types) {
+            if (types.length === 0) {
+                return emptyObjectType;
+            }
+            var typeSet = [];
+            addTypesToSet(typeSet, types, 32768);
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (strictNullChecks) {
+                if (typeSet.containsNull)
+                    typeSet.push(nullType);
+                if (typeSet.containsUndefined)
+                    typeSet.push(undefinedType);
+            }
+            if (typeSet.length === 1) {
+                return typeSet[0];
+            }
+            var id = getTypeListId(typeSet);
+            var type = intersectionTypes[id];
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, 96);
+                type = intersectionTypes[id] = createObjectType(32768 | propagatedFlags);
+                type.types = typeSet;
+            }
+            return type;
+        }
+        function getTypeFromIntersectionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNode));
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createObjectType(65536, node.symbol);
+            }
+            return links.resolvedType;
+        }
+        function getStringLiteralTypeForText(text) {
+            if (ts.hasProperty(stringLiteralTypes, text)) {
+                return stringLiteralTypes[text];
+            }
+            var type = stringLiteralTypes[text] = createType(256);
+            type.text = text;
+            return type;
+        }
+        function getTypeFromStringLiteralTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getStringLiteralTypeForText(ts.unescapeIdentifier(node.text));
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocVariadicType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var type = getTypeFromTypeNode(node.type);
+                links.resolvedType = type ? createArrayType(type) : unknownType;
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocTupleType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var types = ts.map(node.types, getTypeFromTypeNode);
+                links.resolvedType = createTupleType(types);
+            }
+            return links.resolvedType;
+        }
+        function getThisType(node) {
+            var container = ts.getThisContainer(node, false);
+            var parent = container && container.parent;
+            if (parent && (ts.isClassLike(parent) || parent.kind === 222)) {
+                if (!(container.flags & 32) &&
+                    (container.kind !== 148 || ts.isNodeDescendentOf(node, container.body))) {
+                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
+                }
+            }
+            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
+            return unknownType;
+        }
+        function getTypeFromThisTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getThisType(node);
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeNode(node) {
+            switch (node.kind) {
+                case 117:
+                case 258:
+                case 259:
+                    return anyType;
+                case 132:
+                    return stringType;
+                case 130:
+                    return numberType;
+                case 120:
+                    return booleanType;
+                case 133:
+                    return esSymbolType;
+                case 103:
+                    return voidType;
+                case 135:
+                    return undefinedType;
+                case 93:
+                    return nullType;
+                case 127:
+                    return neverType;
+                case 165:
+                case 97:
+                    return getTypeFromThisTypeNode(node);
+                case 166:
+                    return getTypeFromStringLiteralTypeNode(node);
+                case 155:
+                case 267:
+                    return getTypeFromTypeReference(node);
+                case 154:
+                    return booleanType;
+                case 194:
+                    return getTypeFromTypeReference(node);
+                case 158:
+                    return getTypeFromTypeQueryNode(node);
+                case 160:
+                case 260:
+                    return getTypeFromArrayTypeNode(node);
+                case 161:
+                    return getTypeFromTupleTypeNode(node);
+                case 162:
+                case 261:
+                    return getTypeFromUnionTypeNode(node);
+                case 163:
+                    return getTypeFromIntersectionTypeNode(node);
+                case 164:
+                case 263:
+                case 264:
+                case 271:
+                case 272:
+                case 268:
+                    return getTypeFromTypeNode(node.type);
+                case 156:
+                case 157:
+                case 159:
+                case 281:
+                case 269:
+                case 265:
+                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                case 69:
+                case 139:
+                    var symbol = getSymbolAtLocation(node);
+                    return symbol && getDeclaredTypeOfSymbol(symbol);
+                case 262:
+                    return getTypeFromJSDocTupleType(node);
+                case 270:
+                    return getTypeFromJSDocVariadicType(node);
+                default:
+                    return unknownType;
+            }
+        }
+        function instantiateList(items, mapper, instantiator) {
+            if (items && items.length) {
+                var result = [];
+                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
+                    var v = items_1[_i];
+                    result.push(instantiator(v, mapper));
+                }
+                return result;
+            }
+            return items;
+        }
+        function createUnaryTypeMapper(source, target) {
+            return function (t) { return t === source ? target : t; };
+        }
+        function createBinaryTypeMapper(source1, target1, source2, target2) {
+            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
+        }
+        function createArrayTypeMapper(sources, targets) {
+            return function (t) {
+                for (var i = 0; i < sources.length; i++) {
+                    if (t === sources[i]) {
+                        return targets ? targets[i] : anyType;
+                    }
+                }
+                return t;
+            };
+        }
+        function createTypeMapper(sources, targets) {
+            var count = sources.length;
+            var mapper = count == 1 ? createUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
+                count == 2 ? createBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
+                    createArrayTypeMapper(sources, targets);
+            mapper.mappedTypes = sources;
+            return mapper;
+        }
+        function createTypeEraser(sources) {
+            return createTypeMapper(sources, undefined);
+        }
+        function getInferenceMapper(context) {
+            if (!context.mapper) {
+                var mapper = function (t) {
+                    var typeParameters = context.typeParameters;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (t === typeParameters[i]) {
+                            context.inferences[i].isFixed = true;
+                            return getInferredType(context, i);
+                        }
+                    }
+                    return t;
+                };
+                mapper.mappedTypes = context.typeParameters;
+                mapper.context = context;
+                context.mapper = mapper;
+            }
+            return context.mapper;
+        }
+        function identityMapper(type) {
+            return type;
+        }
+        function combineTypeMappers(mapper1, mapper2) {
+            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
+            mapper.mappedTypes = mapper1.mappedTypes;
+            return mapper;
+        }
+        function cloneTypeParameter(typeParameter) {
+            var result = createType(512);
+            result.symbol = typeParameter.symbol;
+            result.target = typeParameter;
+            return result;
+        }
+        function cloneTypePredicate(predicate, mapper) {
+            if (ts.isIdentifierTypePredicate(predicate)) {
+                return {
+                    kind: 1,
+                    parameterName: predicate.parameterName,
+                    parameterIndex: predicate.parameterIndex,
+                    type: instantiateType(predicate.type, mapper)
+                };
+            }
+            else {
+                return {
+                    kind: 0,
+                    type: instantiateType(predicate.type, mapper)
+                };
+            }
+        }
+        function instantiateSignature(signature, mapper, eraseTypeParameters) {
+            var freshTypeParameters;
+            var freshTypePredicate;
+            if (signature.typeParameters && !eraseTypeParameters) {
+                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
+                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
+                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
+                    var tp = freshTypeParameters_1[_i];
+                    tp.mapper = mapper;
+                }
+            }
+            if (signature.typePredicate) {
+                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
+            }
+            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisType && instantiateType(signature.thisType, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), instantiateType(signature.resolvedReturnType, mapper), freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasStringLiterals);
+            result.target = signature;
+            result.mapper = mapper;
+            return result;
+        }
+        function instantiateSymbol(symbol, mapper) {
+            if (symbol.flags & 16777216) {
+                var links = getSymbolLinks(symbol);
+                symbol = links.target;
+                mapper = combineTypeMappers(links.mapper, mapper);
+            }
+            var result = createSymbol(16777216 | 67108864 | symbol.flags, symbol.name);
+            result.declarations = symbol.declarations;
+            result.parent = symbol.parent;
+            result.target = symbol;
+            result.mapper = mapper;
+            if (symbol.valueDeclaration) {
+                result.valueDeclaration = symbol.valueDeclaration;
+            }
+            return result;
+        }
+        function instantiateAnonymousType(type, mapper) {
+            if (mapper.instantiations) {
+                var cachedType = mapper.instantiations[type.id];
+                if (cachedType) {
+                    return cachedType;
+                }
+            }
+            else {
+                mapper.instantiations = [];
+            }
+            var result = createObjectType(65536 | 131072, type.symbol);
+            result.target = type;
+            result.mapper = mapper;
+            mapper.instantiations[type.id] = result;
+            return result;
+        }
+        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
+            var mappedTypes = mapper.mappedTypes;
+            var node = symbol.declarations[0].parent;
+            while (node) {
+                switch (node.kind) {
+                    case 156:
+                    case 157:
+                    case 220:
+                    case 147:
+                    case 146:
+                    case 148:
+                    case 151:
+                    case 152:
+                    case 153:
+                    case 149:
+                    case 150:
+                    case 179:
+                    case 180:
+                    case 221:
+                    case 192:
+                    case 222:
+                    case 223:
+                        var declaration = node;
+                        if (declaration.typeParameters) {
+                            for (var _i = 0, _a = declaration.typeParameters; _i < _a.length; _i++) {
+                                var d = _a[_i];
+                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
+                                    return true;
+                                }
+                            }
+                        }
+                        if (ts.isClassLike(node) || node.kind === 222) {
+                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
+                            if (thisType && ts.contains(mappedTypes, thisType)) {
+                                return true;
+                            }
+                        }
+                        break;
+                    case 225:
+                    case 256:
+                        return false;
+                }
+                node = node.parent;
+            }
+            return false;
+        }
+        function instantiateType(type, mapper) {
+            if (type && mapper !== identityMapper) {
+                if (type.flags & 512) {
+                    return mapper(type);
+                }
+                if (type.flags & 65536) {
+                    return type.symbol &&
+                        type.symbol.flags & (16 | 8192 | 32 | 2048 | 4096) &&
+                        (type.flags & 131072 || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
+                        instantiateAnonymousType(type, mapper) : type;
+                }
+                if (type.flags & 4096) {
+                    return createTypeReference(type.target, instantiateList(type.typeArguments, mapper, instantiateType));
+                }
+                if (type.flags & 8192) {
+                    return createTupleType(instantiateList(type.elementTypes, mapper, instantiateType));
+                }
+                if (type.flags & 16384) {
+                    return getUnionType(instantiateList(type.types, mapper, instantiateType), true);
+                }
+                if (type.flags & 32768) {
+                    return getIntersectionType(instantiateList(type.types, mapper, instantiateType));
+                }
+            }
+            return type;
+        }
+        function instantiateIndexInfo(info, mapper) {
+            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
+        }
+        function isContextSensitive(node) {
+            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
+            switch (node.kind) {
+                case 179:
+                case 180:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 171:
+                    return ts.forEach(node.properties, isContextSensitive);
+                case 170:
+                    return ts.forEach(node.elements, isContextSensitive);
+                case 188:
+                    return isContextSensitive(node.whenTrue) ||
+                        isContextSensitive(node.whenFalse);
+                case 187:
+                    return node.operatorToken.kind === 52 &&
+                        (isContextSensitive(node.left) || isContextSensitive(node.right));
+                case 253:
+                    return isContextSensitive(node.initializer);
+                case 147:
+                case 146:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 178:
+                    return isContextSensitive(node.expression);
+            }
+            return false;
+        }
+        function isContextSensitiveFunctionLikeDeclaration(node) {
+            var areAllParametersUntyped = !ts.forEach(node.parameters, function (p) { return p.type; });
+            var isNullaryArrow = node.kind === 180 && !node.parameters.length;
+            return !node.typeParameters && areAllParametersUntyped && !isNullaryArrow;
+        }
+        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
+            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
+        }
+        function getTypeWithoutSignatures(type) {
+            if (type.flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.constructSignatures.length) {
+                    var result = createObjectType(65536, type.symbol);
+                    result.members = resolved.members;
+                    result.properties = resolved.properties;
+                    result.callSignatures = emptyArray;
+                    result.constructSignatures = emptyArray;
+                    type = result;
+                }
+            }
+            return type;
+        }
+        function isTypeIdenticalTo(source, target) {
+            return checkTypeRelatedTo(source, target, identityRelation, undefined);
+        }
+        function compareTypesIdentical(source, target) {
+            return checkTypeRelatedTo(source, target, identityRelation, undefined) ? -1 : 0;
+        }
+        function compareTypesAssignable(source, target) {
+            return checkTypeRelatedTo(source, target, assignableRelation, undefined) ? -1 : 0;
+        }
+        function isTypeSubtypeOf(source, target) {
+            return checkTypeSubtypeOf(source, target, undefined);
+        }
+        function isTypeAssignableTo(source, target) {
+            return checkTypeAssignableTo(source, target, undefined);
+        }
+        function isTypeComparableTo(source, target) {
+            return checkTypeComparableTo(source, target, undefined);
+        }
+        function checkTypeSubtypeOf(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
+            return compareSignaturesRelated(source, target, ignoreReturnTypes, false, undefined, compareTypesAssignable) !== 0;
+        }
+        function compareSignaturesRelated(source, target, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
+            if (source === target) {
+                return -1;
+            }
+            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
+                return 0;
+            }
+            source = getErasedSignature(source);
+            target = getErasedSignature(target);
+            var result = -1;
+            if (source.thisType && target.thisType && source.thisType !== voidType) {
+                var related = compareTypes(source.thisType, target.thisType, false)
+                    || compareTypes(target.thisType, source.thisType, reportErrors);
+                if (!related) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
+                    }
+                    return 0;
+                }
+                result &= related;
+            }
+            var sourceMax = getNumNonRestParameters(source);
+            var targetMax = getNumNonRestParameters(target);
+            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
+            var sourceParams = source.parameters;
+            var targetParams = target.parameters;
+            for (var i = 0; i < checkCount; i++) {
+                var s = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
+                var t = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
+                var related = compareTypes(s, t, false) || compareTypes(t, s, reportErrors);
+                if (!related) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
+                    }
+                    return 0;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                var targetReturnType = getReturnTypeOfSignature(target);
+                if (targetReturnType === voidType) {
+                    return result;
+                }
+                var sourceReturnType = getReturnTypeOfSignature(source);
+                if (target.typePredicate) {
+                    if (source.typePredicate) {
+                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
+                    }
+                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
+                        if (reportErrors) {
+                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
+                        }
+                        return 0;
+                    }
+                }
+                else {
+                    result &= compareTypes(sourceReturnType, targetReturnType, reportErrors);
+                }
+            }
+            return result;
+        }
+        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
+            if (source.kind !== target.kind) {
+                if (reportErrors) {
+                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
+                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                }
+                return 0;
+            }
+            if (source.kind === 1) {
+                var sourceIdentifierPredicate = source;
+                var targetIdentifierPredicate = target;
+                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
+                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                    }
+                    return 0;
+                }
+            }
+            var related = compareTypes(source.type, target.type, reportErrors);
+            if (related === 0 && reportErrors) {
+                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+            }
+            return related;
+        }
+        function isImplementationCompatibleWithOverload(implementation, overload) {
+            var erasedSource = getErasedSignature(implementation);
+            var erasedTarget = getErasedSignature(overload);
+            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
+            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
+            if (targetReturnType === voidType
+                || checkTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation, undefined)
+                || checkTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation, undefined)) {
+                return isSignatureAssignableTo(erasedSource, erasedTarget, true);
+            }
+            return false;
+        }
+        function getNumNonRestParameters(signature) {
+            var numParams = signature.parameters.length;
+            return signature.hasRestParameter ?
+                numParams - 1 :
+                numParams;
+        }
+        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
+            if (source.hasRestParameter === target.hasRestParameter) {
+                if (source.hasRestParameter) {
+                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
+                }
+                else {
+                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
+                }
+            }
+            else {
+                return source.hasRestParameter ?
+                    targetNonRestParamCount :
+                    sourceNonRestParamCount;
+            }
+        }
+        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
+            var errorInfo;
+            var sourceStack;
+            var targetStack;
+            var maybeStack;
+            var expandingFlags;
+            var depth = 0;
+            var overflow = false;
+            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
+            var result = isRelatedTo(source, target, !!errorNode, headMessage);
+            if (overflow) {
+                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
+            }
+            else if (errorInfo) {
+                if (containingMessageChain) {
+                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
+                }
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
+            }
+            return result !== 0;
+            function reportError(message, arg0, arg1, arg2) {
+                ts.Debug.assert(!!errorNode);
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+            }
+            function reportRelationError(message, source, target) {
+                var sourceType = typeToString(source);
+                var targetType = typeToString(target);
+                if (sourceType === targetType) {
+                    sourceType = typeToString(source, undefined, 128);
+                    targetType = typeToString(target, undefined, 128);
+                }
+                if (!message) {
+                    message = relation === comparableRelation ?
+                        ts.Diagnostics.Type_0_is_not_comparable_to_type_1 :
+                        ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
+                }
+                reportError(message, sourceType, targetType);
+            }
+            function isRelatedTo(source, target, reportErrors, headMessage) {
+                var result;
+                if (source === target)
+                    return -1;
+                if (relation === identityRelation) {
+                    return isIdenticalTo(source, target);
+                }
+                if (!(target.flags & 134217728)) {
+                    if (target.flags & 1 || source.flags & 134217728)
+                        return -1;
+                    if (source.flags & 32) {
+                        if (!strictNullChecks || target.flags & (32 | 16))
+                            return -1;
+                    }
+                    if (source.flags & 64) {
+                        if (!strictNullChecks || target.flags & 64)
+                            return -1;
+                    }
+                    if (source.flags & 128 && target === numberType)
+                        return -1;
+                    if (source.flags & 128 && target.flags & 128) {
+                        if (result = enumRelatedTo(source, target, reportErrors)) {
+                            return result;
+                        }
+                    }
+                    if (source.flags & 256 && target === stringType)
+                        return -1;
+                    if (relation === assignableRelation || relation === comparableRelation) {
+                        if (source.flags & 1)
+                            return -1;
+                        if (source === numberType && target.flags & 128)
+                            return -1;
+                    }
+                    if (source.flags & 8 && target.flags & 8) {
+                        return -1;
+                    }
+                }
+                if (source.flags & 1048576) {
+                    if (hasExcessProperties(source, target, reportErrors)) {
+                        if (reportErrors) {
+                            reportRelationError(headMessage, source, target);
+                        }
+                        return 0;
+                    }
+                    if (target.flags & 49152) {
+                        source = getRegularTypeOfObjectLiteral(source);
+                    }
+                }
+                var saveErrorInfo = errorInfo;
+                if (source.flags & 16384) {
+                    if (relation === comparableRelation) {
+                        result = someTypeRelatedToType(source, target, reportErrors);
+                    }
+                    else {
+                        result = eachTypeRelatedToType(source, target, reportErrors);
+                    }
+                    if (result) {
+                        return result;
+                    }
+                }
+                else if (target.flags & 32768) {
+                    result = typeRelatedToEachType(source, target, reportErrors);
+                    if (result) {
+                        return result;
+                    }
+                }
+                else {
+                    if (source.flags & 32768) {
+                        if (result = someTypeRelatedToType(source, target, false)) {
+                            return result;
+                        }
+                    }
+                    if (target.flags & 16384) {
+                        if (result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 16777726))) {
+                            return result;
+                        }
+                    }
+                }
+                if (source.flags & 512) {
+                    var constraint = getConstraintOfTypeParameter(source);
+                    if (!constraint || constraint.flags & 1) {
+                        constraint = emptyObjectType;
+                    }
+                    constraint = getTypeWithThisArgument(constraint, source);
+                    var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
+                    if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
+                        errorInfo = saveErrorInfo;
+                        return result;
+                    }
+                }
+                else {
+                    if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
+                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
+                            return result;
+                        }
+                    }
+                    var apparentSource = getApparentType(source);
+                    if (apparentSource.flags & (80896 | 32768) && target.flags & 80896) {
+                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !(source.flags & 16777726);
+                        if (result = objectTypeRelatedTo(apparentSource, source, target, reportStructuralErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
+                    }
+                }
+                if (reportErrors) {
+                    reportRelationError(headMessage, source, target);
+                }
+                return 0;
+            }
+            function isIdenticalTo(source, target) {
+                var result;
+                if (source.flags & 80896 && target.flags & 80896) {
+                    if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
+                        if (result = typeArgumentsRelatedTo(source, target, false)) {
+                            return result;
+                        }
+                    }
+                    return objectTypeRelatedTo(source, source, target, false);
+                }
+                if (source.flags & 16384 && target.flags & 16384 ||
+                    source.flags & 32768 && target.flags & 32768) {
+                    if (result = eachTypeRelatedToSomeType(source, target, false)) {
+                        if (result &= eachTypeRelatedToSomeType(target, source, false)) {
+                            return result;
+                        }
+                    }
+                }
+                return 0;
+            }
+            function isKnownProperty(type, name) {
+                if (type.flags & 80896) {
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if ((relation === assignableRelation || relation === comparableRelation) && (type === globalObjectType || isEmptyObjectType(resolved)) ||
+                        resolved.stringIndexInfo ||
+                        (resolved.numberIndexInfo && isNumericLiteralName(name)) ||
+                        getPropertyOfType(type, name)) {
+                        return true;
+                    }
+                }
+                else if (type.flags & 49152) {
+                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                        var t = _a[_i];
+                        if (isKnownProperty(t, name)) {
+                            return true;
+                        }
+                    }
+                }
+                return false;
+            }
+            function isEmptyObjectType(t) {
+                return t.properties.length === 0 &&
+                    t.callSignatures.length === 0 &&
+                    t.constructSignatures.length === 0 &&
+                    !t.stringIndexInfo &&
+                    !t.numberIndexInfo;
+            }
+            function hasExcessProperties(source, target, reportErrors) {
+                if (!(target.flags & 67108864) && maybeTypeOfKind(target, 80896)) {
+                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                        var prop = _a[_i];
+                        if (!isKnownProperty(target, prop.name)) {
+                            if (reportErrors) {
+                                ts.Debug.assert(!!errorNode);
+                                errorNode = prop.valueDeclaration;
+                                reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
+                            }
+                            return true;
+                        }
+                    }
+                }
+                return false;
+            }
+            function eachTypeRelatedToSomeType(source, target, reportErrors) {
+                var result = -1;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
+                    var sourceType = sourceTypes_1[_i];
+                    var related = typeRelatedToSomeType(sourceType, target, false);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeRelatedToSomeType(source, target, reportErrors) {
+                var targetTypes = target.types;
+                var len = targetTypes.length;
+                while (len >= 2 && targetTypes[len - 1].flags & 96) {
+                    var related = isRelatedTo(source, targetTypes[len - 1], false);
+                    if (related) {
+                        return related;
+                    }
+                    len--;
+                }
+                for (var i = 0; i < len; i++) {
+                    var related = isRelatedTo(source, targetTypes[i], reportErrors && i === len - 1);
+                    if (related) {
+                        return related;
+                    }
+                }
+                return 0;
+            }
+            function typeRelatedToEachType(source, target, reportErrors) {
+                var result = -1;
+                var targetTypes = target.types;
+                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
+                    var targetType = targetTypes_1[_i];
+                    var related = isRelatedTo(source, targetType, reportErrors);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function someTypeRelatedToType(source, target, reportErrors) {
+                var sourceTypes = source.types;
+                var len = sourceTypes.length;
+                while (len >= 2 && sourceTypes[len - 1].flags & 96) {
+                    var related = isRelatedTo(sourceTypes[len - 1], target, false);
+                    if (related) {
+                        return related;
+                    }
+                    len--;
+                }
+                for (var i = 0; i < len; i++) {
+                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
+                    if (related) {
+                        return related;
+                    }
+                }
+                return 0;
+            }
+            function eachTypeRelatedToType(source, target, reportErrors) {
+                var result = -1;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
+                    var sourceType = sourceTypes_2[_i];
+                    var related = isRelatedTo(sourceType, target, reportErrors);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeArgumentsRelatedTo(source, target, reportErrors) {
+                var sources = source.typeArguments || emptyArray;
+                var targets = target.typeArguments || emptyArray;
+                if (sources.length !== targets.length && relation === identityRelation) {
+                    return 0;
+                }
+                var length = sources.length <= targets.length ? sources.length : targets.length;
+                var result = -1;
+                for (var i = 0; i < length; i++) {
+                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function objectTypeRelatedTo(source, originalSource, target, reportErrors) {
+                if (overflow) {
+                    return 0;
+                }
+                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
+                var related = relation[id];
+                if (related !== undefined) {
+                    if (reportErrors && related === 2) {
+                        relation[id] = 3;
+                    }
+                    else {
+                        return related === 1 ? -1 : 0;
+                    }
+                }
+                if (depth > 0) {
+                    for (var i = 0; i < depth; i++) {
+                        if (maybeStack[i][id]) {
+                            return 1;
+                        }
+                    }
+                    if (depth === 100) {
+                        overflow = true;
+                        return 0;
+                    }
+                }
+                else {
+                    sourceStack = [];
+                    targetStack = [];
+                    maybeStack = [];
+                    expandingFlags = 0;
+                }
+                sourceStack[depth] = source;
+                targetStack[depth] = target;
+                maybeStack[depth] = {};
+                maybeStack[depth][id] = 1;
+                depth++;
+                var saveExpandingFlags = expandingFlags;
+                if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth))
+                    expandingFlags |= 1;
+                if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth))
+                    expandingFlags |= 2;
+                var result;
+                if (expandingFlags === 3) {
+                    result = 1;
+                }
+                else {
+                    result = propertiesRelatedTo(source, target, reportErrors);
+                    if (result) {
+                        result &= signaturesRelatedTo(source, target, 0, reportErrors);
+                        if (result) {
+                            result &= signaturesRelatedTo(source, target, 1, reportErrors);
+                            if (result) {
+                                result &= indexTypesRelatedTo(source, originalSource, target, 0, reportErrors);
+                                if (result) {
+                                    result &= indexTypesRelatedTo(source, originalSource, target, 1, reportErrors);
+                                }
+                            }
+                        }
+                    }
+                }
+                expandingFlags = saveExpandingFlags;
+                depth--;
+                if (result) {
+                    var maybeCache = maybeStack[depth];
+                    var destinationCache = (result === -1 || depth === 0) ? relation : maybeStack[depth - 1];
+                    ts.copyMap(maybeCache, destinationCache);
+                }
+                else {
+                    relation[id] = reportErrors ? 3 : 2;
+                }
+                return result;
+            }
+            function propertiesRelatedTo(source, target, reportErrors) {
+                if (relation === identityRelation) {
+                    return propertiesIdenticalTo(source, target);
+                }
+                var result = -1;
+                var properties = getPropertiesOfObjectType(target);
+                var requireOptionalProperties = relation === subtypeRelation && !(source.flags & 524288);
+                for (var _i = 0, properties_1 = properties; _i < properties_1.length; _i++) {
+                    var targetProp = properties_1[_i];
+                    var sourceProp = getPropertyOfType(source, targetProp.name);
+                    if (sourceProp !== targetProp) {
+                        if (!sourceProp) {
+                            if (!(targetProp.flags & 536870912) || requireOptionalProperties) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
+                                }
+                                return 0;
+                            }
+                        }
+                        else if (!(targetProp.flags & 134217728)) {
+                            var sourcePropFlags = getDeclarationFlagsFromSymbol(sourceProp);
+                            var targetPropFlags = getDeclarationFlagsFromSymbol(targetProp);
+                            if (sourcePropFlags & 8 || targetPropFlags & 8) {
+                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
+                                    if (reportErrors) {
+                                        if (sourcePropFlags & 8 && targetPropFlags & 8) {
+                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
+                                        }
+                                        else {
+                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 ? source : target), typeToString(sourcePropFlags & 8 ? target : source));
+                                        }
+                                    }
+                                    return 0;
+                                }
+                            }
+                            else if (targetPropFlags & 16) {
+                                var sourceDeclaredInClass = sourceProp.parent && sourceProp.parent.flags & 32;
+                                var sourceClass = sourceDeclaredInClass ? getDeclaredTypeOfSymbol(getParentOfSymbol(sourceProp)) : undefined;
+                                var targetClass = getDeclaredTypeOfSymbol(getParentOfSymbol(targetProp));
+                                if (!sourceClass || !hasBaseType(sourceClass, targetClass)) {
+                                    if (reportErrors) {
+                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(sourceClass || source), typeToString(targetClass));
+                                    }
+                                    return 0;
+                                }
+                            }
+                            else if (sourcePropFlags & 16) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0;
+                            }
+                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
+                            if (!related) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
+                                }
+                                return 0;
+                            }
+                            result &= related;
+                            if (sourceProp.flags & 536870912 && !(targetProp.flags & 536870912)) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0;
+                            }
+                        }
+                    }
+                }
+                return result;
+            }
+            function propertiesIdenticalTo(source, target) {
+                if (!(source.flags & 80896 && target.flags & 80896)) {
+                    return 0;
+                }
+                var sourceProperties = getPropertiesOfObjectType(source);
+                var targetProperties = getPropertiesOfObjectType(target);
+                if (sourceProperties.length !== targetProperties.length) {
+                    return 0;
+                }
+                var result = -1;
+                for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
+                    var sourceProp = sourceProperties_1[_i];
+                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
+                    if (!targetProp) {
+                        return 0;
+                    }
+                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function signaturesRelatedTo(source, target, kind, reportErrors) {
+                if (relation === identityRelation) {
+                    return signaturesIdenticalTo(source, target, kind);
+                }
+                if (target === anyFunctionType || source === anyFunctionType) {
+                    return -1;
+                }
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (kind === 1 && sourceSignatures.length && targetSignatures.length) {
+                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
+                        if (reportErrors) {
+                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
+                        }
+                        return 0;
+                    }
+                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
+                        return 0;
+                    }
+                }
+                var result = -1;
+                var saveErrorInfo = errorInfo;
+                outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
+                    var t = targetSignatures_1[_i];
+                    var shouldElaborateErrors = reportErrors;
+                    for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
+                        var s = sourceSignatures_1[_a];
+                        var related = signatureRelatedTo(s, t, shouldElaborateErrors);
+                        if (related) {
+                            result &= related;
+                            errorInfo = saveErrorInfo;
+                            continue outer;
+                        }
+                        shouldElaborateErrors = false;
+                    }
+                    if (shouldElaborateErrors) {
+                        reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, undefined, undefined, kind));
+                    }
+                    return 0;
+                }
+                return result;
+            }
+            function signatureRelatedTo(source, target, reportErrors) {
+                return compareSignaturesRelated(source, target, false, reportErrors, reportError, isRelatedTo);
+            }
+            function signaturesIdenticalTo(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (sourceSignatures.length !== targetSignatures.length) {
+                    return 0;
+                }
+                var result = -1;
+                for (var i = 0, len = sourceSignatures.length; i < len; i++) {
+                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], false, false, false, isRelatedTo);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
+                var result = -1;
+                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 || isNumericLiteralName(prop.name)) {
+                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
+                        if (!related) {
+                            if (reportErrors) {
+                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
+                            }
+                            return 0;
+                        }
+                        result &= related;
+                    }
+                }
+                return result;
+            }
+            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
+                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
+                if (!related && reportErrors) {
+                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
+                }
+                return related;
+            }
+            function indexTypesRelatedTo(source, originalSource, target, kind, reportErrors) {
+                if (relation === identityRelation) {
+                    return indexTypesIdenticalTo(source, target, kind);
+                }
+                var targetInfo = getIndexInfoOfType(target, kind);
+                if (!targetInfo || ((targetInfo.type.flags & 1) && !(originalSource.flags & 16777726))) {
+                    return -1;
+                }
+                var sourceInfo = getIndexInfoOfType(source, kind) ||
+                    kind === 1 && getIndexInfoOfType(source, 0);
+                if (sourceInfo) {
+                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
+                }
+                if (isObjectLiteralType(source)) {
+                    var related = -1;
+                    if (kind === 0) {
+                        var sourceNumberInfo = getIndexInfoOfType(source, 1);
+                        if (sourceNumberInfo) {
+                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
+                        }
+                    }
+                    if (related) {
+                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
+                    }
+                    return related;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
+                }
+                return 0;
+            }
+            function indexTypesIdenticalTo(source, target, indexKind) {
+                var targetInfo = getIndexInfoOfType(target, indexKind);
+                var sourceInfo = getIndexInfoOfType(source, indexKind);
+                if (!sourceInfo && !targetInfo) {
+                    return -1;
+                }
+                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
+                    return isRelatedTo(sourceInfo.type, targetInfo.type);
+                }
+                return 0;
+            }
+            function enumRelatedTo(source, target, reportErrors) {
+                if (source.symbol.name !== target.symbol.name ||
+                    source.symbol.flags & 128 ||
+                    target.symbol.flags & 128) {
+                    return 0;
+                }
+                var targetEnumType = getTypeOfSymbol(target.symbol);
+                for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
+                    var property = _a[_i];
+                    if (property.flags & 8) {
+                        var targetProperty = getPropertyOfType(targetEnumType, property.name);
+                        if (!targetProperty || !(targetProperty.flags & 8)) {
+                            if (reportErrors) {
+                                reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, undefined, 128));
+                            }
+                            return 0;
+                        }
+                    }
+                }
+                return -1;
+            }
+            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
+                if (!sourceSignature.declaration || !targetSignature.declaration) {
+                    return true;
+                }
+                var sourceAccessibility = sourceSignature.declaration.flags & (8 | 16);
+                var targetAccessibility = targetSignature.declaration.flags & (8 | 16);
+                if (targetAccessibility === 8) {
+                    return true;
+                }
+                if (targetAccessibility === 16 && sourceAccessibility !== 8) {
+                    return true;
+                }
+                if (targetAccessibility !== 16 && !sourceAccessibility) {
+                    return true;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
+                }
+                return false;
+            }
+        }
+        function isAbstractConstructorType(type) {
+            if (type.flags & 65536) {
+                var symbol = type.symbol;
+                if (symbol && symbol.flags & 32) {
+                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
+                    if (declaration && declaration.flags & 128) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isDeeplyNestedGeneric(type, stack, depth) {
+            if (type.flags & (4096 | 131072) && depth >= 5) {
+                var symbol = type.symbol;
+                var count = 0;
+                for (var i = 0; i < depth; i++) {
+                    var t = stack[i];
+                    if (t.flags & (4096 | 131072) && t.symbol === symbol) {
+                        count++;
+                        if (count >= 5)
+                            return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isPropertyIdenticalTo(sourceProp, targetProp) {
+            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0;
+        }
+        function compareProperties(sourceProp, targetProp, compareTypes) {
+            if (sourceProp === targetProp) {
+                return -1;
+            }
+            var sourcePropAccessibility = getDeclarationFlagsFromSymbol(sourceProp) & (8 | 16);
+            var targetPropAccessibility = getDeclarationFlagsFromSymbol(targetProp) & (8 | 16);
+            if (sourcePropAccessibility !== targetPropAccessibility) {
+                return 0;
+            }
+            if (sourcePropAccessibility) {
+                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
+                    return 0;
+                }
+            }
+            else {
+                if ((sourceProp.flags & 536870912) !== (targetProp.flags & 536870912)) {
+                    return 0;
+                }
+            }
+            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
+                return 0;
+            }
+            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+        }
+        function isMatchingSignature(source, target, partialMatch) {
+            if (source.parameters.length === target.parameters.length &&
+                source.minArgumentCount === target.minArgumentCount &&
+                source.hasRestParameter === target.hasRestParameter) {
+                return true;
+            }
+            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (source.hasRestParameter && !target.hasRestParameter ||
+                source.hasRestParameter === target.hasRestParameter && source.parameters.length >= target.parameters.length)) {
+                return true;
+            }
+            return false;
+        }
+        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
+            if (source === target) {
+                return -1;
+            }
+            if (!(isMatchingSignature(source, target, partialMatch))) {
+                return 0;
+            }
+            if ((source.typeParameters ? source.typeParameters.length : 0) !== (target.typeParameters ? target.typeParameters.length : 0)) {
+                return 0;
+            }
+            source = getErasedSignature(source);
+            target = getErasedSignature(target);
+            var result = -1;
+            if (!ignoreThisTypes && source.thisType && target.thisType) {
+                var related = compareTypes(source.thisType, target.thisType);
+                if (!related) {
+                    return 0;
+                }
+                result &= related;
+            }
+            var targetLen = target.parameters.length;
+            for (var i = 0; i < targetLen; i++) {
+                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
+                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
+                var related = compareTypes(s, t);
+                if (!related) {
+                    return 0;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+            }
+            return result;
+        }
+        function isRestParameterIndex(signature, parameterIndex) {
+            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
+        }
+        function isSupertypeOfEach(candidate, types) {
+            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
+                var t = types_5[_i];
+                if (candidate !== t && !isTypeSubtypeOf(t, candidate))
+                    return false;
+            }
+            return true;
+        }
+        function getCombinedFlagsOfTypes(types) {
+            var flags = 0;
+            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
+                var t = types_6[_i];
+                flags |= t.flags;
+            }
+            return flags;
+        }
+        function getCommonSupertype(types) {
+            if (!strictNullChecks) {
+                return ts.forEach(types, function (t) { return isSupertypeOfEach(t, types) ? t : undefined; });
+            }
+            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 96); });
+            if (!primaryTypes.length) {
+                return getUnionType(types);
+            }
+            var supertype = ts.forEach(primaryTypes, function (t) { return isSupertypeOfEach(t, primaryTypes) ? t : undefined; });
+            return supertype && addTypeKind(supertype, getCombinedFlagsOfTypes(types) & 96);
+        }
+        function reportNoCommonSupertypeError(types, errorLocation, errorMessageChainHead) {
+            var bestSupertype;
+            var bestSupertypeDownfallType;
+            var bestSupertypeScore = 0;
+            for (var i = 0; i < types.length; i++) {
+                var score = 0;
+                var downfallType = undefined;
+                for (var j = 0; j < types.length; j++) {
+                    if (isTypeSubtypeOf(types[j], types[i])) {
+                        score++;
+                    }
+                    else if (!downfallType) {
+                        downfallType = types[j];
+                    }
+                }
+                ts.Debug.assert(!!downfallType, "If there is no common supertype, each type should have a downfallType");
+                if (score > bestSupertypeScore) {
+                    bestSupertype = types[i];
+                    bestSupertypeDownfallType = downfallType;
+                    bestSupertypeScore = score;
+                }
+                if (bestSupertypeScore === types.length - 1) {
+                    break;
+                }
+            }
+            checkTypeSubtypeOf(bestSupertypeDownfallType, bestSupertype, errorLocation, ts.Diagnostics.Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0, errorMessageChainHead);
+        }
+        function isArrayType(type) {
+            return type.flags & 4096 && type.target === globalArrayType;
+        }
+        function isArrayLikeType(type) {
+            return type.flags & 4096 && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
+                !(type.flags & 96) && isTypeAssignableTo(type, anyReadonlyArrayType);
+        }
+        function isTupleLikeType(type) {
+            return !!getPropertyOfType(type, "0");
+        }
+        function isStringLiteralType(type) {
+            return type.flags & 256;
+        }
+        function isTupleType(type) {
+            return !!(type.flags & 8192);
+        }
+        function getCombinedTypeFlags(type) {
+            return type.flags & 16384 ? getCombinedFlagsOfTypes(type.types) : type.flags;
+        }
+        function addTypeKind(type, kind) {
+            if ((getCombinedTypeFlags(type) & kind) === kind) {
+                return type;
+            }
+            var types = [type];
+            if (kind & 2)
+                types.push(stringType);
+            if (kind & 4)
+                types.push(numberType);
+            if (kind & 8)
+                types.push(booleanType);
+            if (kind & 16)
+                types.push(voidType);
+            if (kind & 32)
+                types.push(undefinedType);
+            if (kind & 64)
+                types.push(nullType);
+            return getUnionType(types);
+        }
+        function getNonNullableType(type) {
+            return strictNullChecks ? getTypeWithFacts(type, 524288) : type;
+        }
+        function isObjectLiteralType(type) {
+            return type.symbol && (type.symbol.flags & (4096 | 2048)) !== 0 &&
+                getSignaturesOfType(type, 0).length === 0 &&
+                getSignaturesOfType(type, 1).length === 0;
+        }
+        function createTransientSymbol(source, type) {
+            var symbol = createSymbol(source.flags | 67108864, source.name);
+            symbol.declarations = source.declarations;
+            symbol.parent = source.parent;
+            symbol.type = type;
+            symbol.target = source;
+            if (source.valueDeclaration) {
+                symbol.valueDeclaration = source.valueDeclaration;
+            }
+            return symbol;
+        }
+        function transformTypeOfMembers(type, f) {
+            var members = {};
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var property = _a[_i];
+                var original = getTypeOfSymbol(property);
+                var updated = f(original);
+                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
+            }
+            ;
+            return members;
+        }
+        function getRegularTypeOfObjectLiteral(type) {
+            if (!(type.flags & 1048576)) {
+                return type;
+            }
+            var regularType = type.regularType;
+            if (regularType) {
+                return regularType;
+            }
+            var resolved = type;
+            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
+            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
+            regularNew.flags = resolved.flags & ~1048576;
+            type.regularType = regularNew;
+            return regularNew;
+        }
+        function getWidenedTypeOfObjectLiteral(type) {
+            var members = transformTypeOfMembers(type, function (prop) {
+                var widened = getWidenedType(prop);
+                return prop === widened ? prop : widened;
+            });
+            var stringIndexInfo = getIndexInfoOfType(type, 0);
+            var numberIndexInfo = getIndexInfoOfType(type, 1);
+            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
+        }
+        function getWidenedConstituentType(type) {
+            return type.flags & 96 ? type : getWidenedType(type);
+        }
+        function getWidenedType(type) {
+            if (type.flags & 6291456) {
+                if (type.flags & 96) {
+                    return anyType;
+                }
+                if (type.flags & 524288) {
+                    return getWidenedTypeOfObjectLiteral(type);
+                }
+                if (type.flags & 16384) {
+                    return getUnionType(ts.map(type.types, getWidenedConstituentType), true);
+                }
+                if (isArrayType(type)) {
+                    return createArrayType(getWidenedType(type.typeArguments[0]));
+                }
+                if (isTupleType(type)) {
+                    return createTupleType(ts.map(type.elementTypes, getWidenedType));
+                }
+            }
+            return type;
+        }
+        function reportWideningErrorsInType(type) {
+            var errorReported = false;
+            if (type.flags & 16384) {
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
+                }
+            }
+            if (isArrayType(type)) {
+                return reportWideningErrorsInType(type.typeArguments[0]);
+            }
+            if (isTupleType(type)) {
+                for (var _b = 0, _c = type.elementTypes; _b < _c.length; _b++) {
+                    var t = _c[_b];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
+                }
+            }
+            if (type.flags & 524288) {
+                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
+                    var p = _e[_d];
+                    var t = getTypeOfSymbol(p);
+                    if (t.flags & 2097152) {
+                        if (!reportWideningErrorsInType(t)) {
+                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
+                        }
+                        errorReported = true;
+                    }
+                }
+            }
+            return errorReported;
+        }
+        function reportImplicitAnyError(declaration, type) {
+            var typeAsString = typeToString(getWidenedType(type));
+            var diagnostic;
+            switch (declaration.kind) {
+                case 145:
+                case 144:
+                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
+                    break;
+                case 142:
+                    diagnostic = declaration.dotDotDotToken ?
+                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
+                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
+                    break;
+                case 169:
+                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
+                    break;
+                case 220:
+                case 147:
+                case 146:
+                case 149:
+                case 150:
+                case 179:
+                case 180:
+                    if (!declaration.name) {
+                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
+                        return;
+                    }
+                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
+                    break;
+                default:
+                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
+            }
+            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
+        }
+        function reportErrorsFromWidening(declaration, type) {
+            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & 2097152) {
+                if (!reportWideningErrorsInType(type)) {
+                    reportImplicitAnyError(declaration, type);
+                }
+            }
+        }
+        function forEachMatchingParameterType(source, target, callback) {
+            var sourceMax = source.parameters.length;
+            var targetMax = target.parameters.length;
+            var count;
+            if (source.hasRestParameter && target.hasRestParameter) {
+                count = Math.max(sourceMax, targetMax);
+            }
+            else if (source.hasRestParameter) {
+                count = targetMax;
+            }
+            else if (target.hasRestParameter) {
+                count = sourceMax;
+            }
+            else {
+                count = Math.min(sourceMax, targetMax);
+            }
+            for (var i = 0; i < count; i++) {
+                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
+            }
+        }
+        function createInferenceContext(typeParameters, inferUnionTypes) {
+            var inferences = ts.map(typeParameters, createTypeInferencesObject);
+            return {
+                typeParameters: typeParameters,
+                inferUnionTypes: inferUnionTypes,
+                inferences: inferences,
+                inferredTypes: new Array(typeParameters.length)
+            };
+        }
+        function createTypeInferencesObject() {
+            return {
+                primary: undefined,
+                secondary: undefined,
+                isFixed: false
+            };
+        }
+        function inferTypes(context, source, target) {
+            var sourceStack;
+            var targetStack;
+            var depth = 0;
+            var inferiority = 0;
+            var visited = {};
+            inferFromTypes(source, target);
+            function isInProcess(source, target) {
+                for (var i = 0; i < depth; i++) {
+                    if (source === sourceStack[i] && target === targetStack[i]) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function inferFromTypes(source, target) {
+                if (source.flags & 16384 && target.flags & 16384 ||
+                    source.flags & 32768 && target.flags & 32768) {
+                    var matchingTypes = void 0;
+                    for (var _i = 0, _a = target.types; _i < _a.length; _i++) {
+                        var t = _a[_i];
+                        if (typeIdenticalToSomeType(t, source.types)) {
+                            (matchingTypes || (matchingTypes = [])).push(t);
+                            inferFromTypes(t, t);
+                        }
+                    }
+                    if (matchingTypes) {
+                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
+                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
+                    }
+                }
+                if (target.flags & 512) {
+                    if (source.flags & 8388608) {
+                        return;
+                    }
+                    var typeParameters = context.typeParameters;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (target === typeParameters[i]) {
+                            var inferences = context.inferences[i];
+                            if (!inferences.isFixed) {
+                                var candidates = inferiority ?
+                                    inferences.secondary || (inferences.secondary = []) :
+                                    inferences.primary || (inferences.primary = []);
+                                if (!ts.contains(candidates, source)) {
+                                    candidates.push(source);
+                                }
+                            }
+                            return;
+                        }
+                    }
+                }
+                else if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
+                    var sourceTypes = source.typeArguments || emptyArray;
+                    var targetTypes = target.typeArguments || emptyArray;
+                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
+                    for (var i = 0; i < count; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
+                }
+                else if (source.flags & 8192 && target.flags & 8192 && source.elementTypes.length === target.elementTypes.length) {
+                    var sourceTypes = source.elementTypes;
+                    var targetTypes = target.elementTypes;
+                    for (var i = 0; i < sourceTypes.length; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
+                }
+                else if (target.flags & 49152) {
+                    var targetTypes = target.types;
+                    var typeParameterCount = 0;
+                    var typeParameter = void 0;
+                    for (var _b = 0, targetTypes_2 = targetTypes; _b < targetTypes_2.length; _b++) {
+                        var t = targetTypes_2[_b];
+                        if (t.flags & 512 && ts.contains(context.typeParameters, t)) {
+                            typeParameter = t;
+                            typeParameterCount++;
+                        }
+                        else {
+                            inferFromTypes(source, t);
+                        }
+                    }
+                    if (typeParameterCount === 1) {
+                        inferiority++;
+                        inferFromTypes(source, typeParameter);
+                        inferiority--;
+                    }
+                }
+                else if (source.flags & 49152) {
+                    var sourceTypes = source.types;
+                    for (var _c = 0, sourceTypes_3 = sourceTypes; _c < sourceTypes_3.length; _c++) {
+                        var sourceType = sourceTypes_3[_c];
+                        inferFromTypes(sourceType, target);
+                    }
+                }
+                else {
+                    source = getApparentType(source);
+                    if (source.flags & 80896 && (target.flags & 4096 && target.typeArguments ||
+                        target.flags & 8192 ||
+                        target.flags & 65536 && target.symbol && target.symbol.flags & (8192 | 2048 | 32))) {
+                        if (isInProcess(source, target)) {
+                            return;
+                        }
+                        if (isDeeplyNestedGeneric(source, sourceStack, depth) && isDeeplyNestedGeneric(target, targetStack, depth)) {
+                            return;
+                        }
+                        var key = source.id + "," + target.id;
+                        if (ts.hasProperty(visited, key)) {
+                            return;
+                        }
+                        visited[key] = true;
+                        if (depth === 0) {
+                            sourceStack = [];
+                            targetStack = [];
+                        }
+                        sourceStack[depth] = source;
+                        targetStack[depth] = target;
+                        depth++;
+                        inferFromProperties(source, target);
+                        inferFromSignatures(source, target, 0);
+                        inferFromSignatures(source, target, 1);
+                        inferFromIndexTypes(source, target);
+                        depth--;
+                    }
+                }
+            }
+            function inferFromProperties(source, target) {
+                var properties = getPropertiesOfObjectType(target);
+                for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
+                    var targetProp = properties_2[_i];
+                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
+                    if (sourceProp) {
+                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+                    }
+                }
+            }
+            function inferFromSignatures(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                var sourceLen = sourceSignatures.length;
+                var targetLen = targetSignatures.length;
+                var len = sourceLen < targetLen ? sourceLen : targetLen;
+                for (var i = 0; i < len; i++) {
+                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
+                }
+            }
+            function inferFromSignature(source, target) {
+                forEachMatchingParameterType(source, target, inferFromTypes);
+                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
+                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
+                }
+                else {
+                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+                }
+            }
+            function inferFromIndexTypes(source, target) {
+                var targetStringIndexType = getIndexTypeOfType(target, 0);
+                if (targetStringIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 0) ||
+                        getImplicitIndexTypeOfType(source, 0);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetStringIndexType);
+                    }
+                }
+                var targetNumberIndexType = getIndexTypeOfType(target, 1);
+                if (targetNumberIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 1) ||
+                        getIndexTypeOfType(source, 0) ||
+                        getImplicitIndexTypeOfType(source, 1);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetNumberIndexType);
+                    }
+                }
+            }
+        }
+        function typeIdenticalToSomeType(type, types) {
+            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
+                var t = types_7[_i];
+                if (isTypeIdenticalTo(t, type)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
+            var reducedTypes = [];
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (!typeIdenticalToSomeType(t, typesToRemove)) {
+                    reducedTypes.push(t);
+                }
+            }
+            return type.flags & 16384 ? getUnionType(reducedTypes, true) : getIntersectionType(reducedTypes);
+        }
+        function getInferenceCandidates(context, index) {
+            var inferences = context.inferences[index];
+            return inferences.primary || inferences.secondary || emptyArray;
+        }
+        function getInferredType(context, index) {
+            var inferredType = context.inferredTypes[index];
+            var inferenceSucceeded;
+            if (!inferredType) {
+                var inferences = getInferenceCandidates(context, index);
+                if (inferences.length) {
+                    var unionOrSuperType = context.inferUnionTypes ? getUnionType(inferences) : getCommonSupertype(inferences);
+                    inferredType = unionOrSuperType ? getWidenedType(unionOrSuperType) : unknownType;
+                    inferenceSucceeded = !!unionOrSuperType;
+                }
+                else {
+                    inferredType = emptyObjectType;
+                    inferenceSucceeded = true;
+                }
+                context.inferredTypes[index] = inferredType;
+                if (inferenceSucceeded) {
+                    var constraint = getConstraintOfTypeParameter(context.typeParameters[index]);
+                    if (constraint) {
+                        var instantiatedConstraint = instantiateType(constraint, getInferenceMapper(context));
+                        if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
+                            context.inferredTypes[index] = inferredType = instantiatedConstraint;
+                        }
+                    }
+                }
+                else if (context.failedTypeParameterIndex === undefined || context.failedTypeParameterIndex > index) {
+                    context.failedTypeParameterIndex = index;
+                }
+            }
+            return inferredType;
+        }
+        function getInferredTypes(context) {
+            for (var i = 0; i < context.inferredTypes.length; i++) {
+                getInferredType(context, i);
+            }
+            return context.inferredTypes;
+        }
+        function getResolvedSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 | 1048576, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol;
+            }
+            return links.resolvedSymbol;
+        }
+        function isInTypeQuery(node) {
+            while (node) {
+                switch (node.kind) {
+                    case 158:
+                        return true;
+                    case 69:
+                    case 139:
+                        node = node.parent;
+                        continue;
+                    default:
+                        return false;
+                }
+            }
+            ts.Debug.fail("should not get here");
+        }
+        function getFlowCacheKey(node) {
+            if (node.kind === 69) {
+                var symbol = getResolvedSymbol(node);
+                return symbol !== unknownSymbol ? "" + getSymbolId(symbol) : undefined;
+            }
+            if (node.kind === 97) {
+                return "0";
+            }
+            if (node.kind === 172) {
+                var key = getFlowCacheKey(node.expression);
+                return key && key + "." + node.name.text;
+            }
+            return undefined;
+        }
+        function isNullOrUndefinedLiteral(node) {
+            return node.kind === 93 ||
+                node.kind === 69 && getResolvedSymbol(node) === undefinedSymbol;
+        }
+        function getLeftmostIdentifierOrThis(node) {
+            switch (node.kind) {
+                case 69:
+                case 97:
+                    return node;
+                case 172:
+                    return getLeftmostIdentifierOrThis(node.expression);
+            }
+            return undefined;
+        }
+        function isMatchingReference(source, target) {
+            if (source.kind === target.kind) {
+                switch (source.kind) {
+                    case 69:
+                        return getResolvedSymbol(source) === getResolvedSymbol(target);
+                    case 97:
+                        return true;
+                    case 172:
+                        return source.name.text === target.name.text &&
+                            isMatchingReference(source.expression, target.expression);
+                }
+            }
+            return false;
+        }
+        function containsMatchingReference(source, target) {
+            while (source.kind === 172) {
+                source = source.expression;
+                if (isMatchingReference(source, target)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function isOrContainsMatchingReference(source, target) {
+            return isMatchingReference(source, target) || containsMatchingReference(source, target);
+        }
+        function hasMatchingArgument(callExpression, reference) {
+            if (callExpression.arguments) {
+                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
+                    var argument = _a[_i];
+                    if (isOrContainsMatchingReference(reference, argument)) {
+                        return true;
+                    }
+                }
+            }
+            if (callExpression.expression.kind === 172 &&
+                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
+                return true;
+            }
+            return false;
+        }
+        function getFlowNodeId(flow) {
+            if (!flow.id) {
+                flow.id = nextFlowId;
+                nextFlowId++;
+            }
+            return flow.id;
+        }
+        function typeMaybeAssignableTo(source, target) {
+            if (!(source.flags & 16384)) {
+                return isTypeAssignableTo(source, target);
+            }
+            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (isTypeAssignableTo(t, target)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function getAssignmentReducedType(declaredType, assignedType) {
+            if (declaredType !== assignedType && declaredType.flags & 16384) {
+                var reducedTypes = ts.filter(declaredType.types, function (t) { return typeMaybeAssignableTo(assignedType, t); });
+                if (reducedTypes.length) {
+                    return reducedTypes.length === 1 ? reducedTypes[0] : getUnionType(reducedTypes);
+                }
+            }
+            return declaredType;
+        }
+        function getTypeFacts(type) {
+            var flags = type.flags;
+            if (flags & 258) {
+                return strictNullChecks ? 4079361 : 4194049;
+            }
+            if (flags & 132) {
+                return strictNullChecks ? 4079234 : 4193922;
+            }
+            if (flags & 8) {
+                return strictNullChecks ? 4078980 : 4193668;
+            }
+            if (flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return resolved.callSignatures.length || resolved.constructSignatures.length || isTypeSubtypeOf(type, globalFunctionType) ?
+                    strictNullChecks ? 1970144 : 4181984 :
+                    strictNullChecks ? 1972176 : 4184016;
+            }
+            if (flags & (16 | 32)) {
+                return 2457472;
+            }
+            if (flags & 64) {
+                return 2340752;
+            }
+            if (flags & 16777216) {
+                return strictNullChecks ? 1981320 : 4193160;
+            }
+            if (flags & 512) {
+                var constraint = getConstraintOfTypeParameter(type);
+                return constraint ? getTypeFacts(constraint) : 4194303;
+            }
+            if (flags & 32768) {
+                return ts.reduceLeft(type.types, function (flags, type) { return flags |= getTypeFacts(type); }, 0);
+            }
+            return 4194303;
+        }
+        function getTypeWithFacts(type, include) {
+            if (!(type.flags & 16384)) {
+                return getTypeFacts(type) & include ? type : neverType;
+            }
+            var firstType;
+            var types;
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (getTypeFacts(t) & include) {
+                    if (!firstType) {
+                        firstType = t;
+                    }
+                    else {
+                        if (!types) {
+                            types = [firstType];
+                        }
+                        types.push(t);
+                    }
+                }
+            }
+            return firstType ? types ? getUnionType(types, true) : firstType : neverType;
+        }
+        function getTypeWithDefault(type, defaultExpression) {
+            if (defaultExpression) {
+                var defaultType = checkExpression(defaultExpression);
+                return getUnionType([getTypeWithFacts(type, 131072), defaultType]);
+            }
+            return type;
+        }
+        function getTypeOfDestructuredProperty(type, name) {
+            var text = getTextOfPropertyName(name);
+            return getTypeOfPropertyOfType(type, text) ||
+                isNumericLiteralName(text) && getIndexTypeOfType(type, 1) ||
+                getIndexTypeOfType(type, 0) ||
+                unknownType;
+        }
+        function getTypeOfDestructuredArrayElement(type, index) {
+            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
+                checkIteratedTypeOrElementType(type, undefined, false) ||
+                unknownType;
+        }
+        function getTypeOfDestructuredSpreadElement(type) {
+            return createArrayType(checkIteratedTypeOrElementType(type, undefined, false) || unknownType);
+        }
+        function getAssignedTypeOfBinaryExpression(node) {
+            return node.parent.kind === 170 || node.parent.kind === 253 ?
+                getTypeWithDefault(getAssignedType(node), node.right) :
+                checkExpression(node.right);
+        }
+        function getAssignedTypeOfArrayLiteralElement(node, element) {
+            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
+        }
+        function getAssignedTypeOfSpreadElement(node) {
+            return getTypeOfDestructuredSpreadElement(getAssignedType(node.parent));
+        }
+        function getAssignedTypeOfPropertyAssignment(node) {
+            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
+        }
+        function getAssignedTypeOfShorthandPropertyAssignment(node) {
+            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
+        }
+        function getAssignedType(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 207:
+                    return stringType;
+                case 208:
+                    return checkRightHandSideOfForOf(parent.expression) || unknownType;
+                case 187:
+                    return getAssignedTypeOfBinaryExpression(parent);
+                case 181:
+                    return undefinedType;
+                case 170:
+                    return getAssignedTypeOfArrayLiteralElement(parent, node);
+                case 191:
+                    return getAssignedTypeOfSpreadElement(parent);
+                case 253:
+                    return getAssignedTypeOfPropertyAssignment(parent);
+                case 254:
+                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
+            }
+            return unknownType;
+        }
+        function getInitialTypeOfBindingElement(node) {
+            var pattern = node.parent;
+            var parentType = getInitialType(pattern.parent);
+            var type = pattern.kind === 167 ?
+                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
+                !node.dotDotDotToken ?
+                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
+                    getTypeOfDestructuredSpreadElement(parentType);
+            return getTypeWithDefault(type, node.initializer);
+        }
+        function getTypeOfInitializer(node) {
+            var links = getNodeLinks(node);
+            return links.resolvedType || checkExpression(node);
+        }
+        function getInitialTypeOfVariableDeclaration(node) {
+            if (node.initializer) {
+                return getTypeOfInitializer(node.initializer);
+            }
+            if (node.parent.parent.kind === 207) {
+                return stringType;
+            }
+            if (node.parent.parent.kind === 208) {
+                return checkRightHandSideOfForOf(node.parent.parent.expression) || unknownType;
+            }
+            return unknownType;
+        }
+        function getInitialType(node) {
+            return node.kind === 218 ?
+                getInitialTypeOfVariableDeclaration(node) :
+                getInitialTypeOfBindingElement(node);
+        }
+        function getReferenceFromExpression(node) {
+            switch (node.kind) {
+                case 178:
+                    return getReferenceFromExpression(node.expression);
+                case 187:
+                    switch (node.operatorToken.kind) {
+                        case 56:
+                            return getReferenceFromExpression(node.left);
+                        case 24:
+                            return getReferenceFromExpression(node.right);
+                    }
+            }
+            return node;
+        }
+        function getFlowTypeOfReference(reference, declaredType, assumeInitialized, includeOuterFunctions) {
+            var key;
+            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & 16908175)) {
+                return declaredType;
+            }
+            var initialType = assumeInitialized ? declaredType : addTypeKind(declaredType, 32);
+            var visitedFlowStart = visitedFlowCount;
+            var result = getTypeAtFlowNode(reference.flowNode);
+            visitedFlowCount = visitedFlowStart;
+            if (reference.parent.kind === 196 && getTypeWithFacts(result, 524288) === neverType) {
+                return declaredType;
+            }
+            return result;
+            function getTypeAtFlowNode(flow) {
+                while (true) {
+                    if (flow.flags & 256) {
+                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
+                            if (visitedFlowNodes[i] === flow) {
+                                return visitedFlowTypes[i];
+                            }
+                        }
+                    }
+                    var type = void 0;
+                    if (flow.flags & 16) {
+                        type = getTypeAtFlowAssignment(flow);
+                        if (!type) {
+                            flow = flow.antecedent;
+                            continue;
+                        }
+                    }
+                    else if (flow.flags & 96) {
+                        type = getTypeAtFlowCondition(flow);
+                    }
+                    else if (flow.flags & 12) {
+                        if (flow.antecedents.length === 1) {
+                            flow = flow.antecedents[0];
+                            continue;
+                        }
+                        type = flow.flags & 4 ?
+                            getTypeAtFlowBranchLabel(flow) :
+                            getTypeAtFlowLoopLabel(flow);
+                    }
+                    else if (flow.flags & 2) {
+                        var container = flow.container;
+                        if (container && includeOuterFunctions) {
+                            flow = container.flowNode;
+                            continue;
+                        }
+                        type = initialType;
+                    }
+                    else {
+                        type = declaredType;
+                    }
+                    if (flow.flags & 256) {
+                        visitedFlowNodes[visitedFlowCount] = flow;
+                        visitedFlowTypes[visitedFlowCount] = type;
+                        visitedFlowCount++;
+                    }
+                    return type;
+                }
+            }
+            function getTypeAtFlowAssignment(flow) {
+                var node = flow.node;
+                if ((node.kind === 218 || node.kind === 169) &&
+                    reference.kind === 69 &&
+                    getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(reference)) === getSymbolOfNode(node)) {
+                    return declaredType.flags & 16384 ?
+                        getAssignmentReducedType(declaredType, getInitialType(node)) :
+                        declaredType;
+                }
+                if (isMatchingReference(reference, node)) {
+                    return declaredType.flags & 16384 ?
+                        getAssignmentReducedType(declaredType, getAssignedType(node)) :
+                        declaredType;
+                }
+                if (containsMatchingReference(reference, node)) {
+                    return declaredType;
+                }
+                return undefined;
+            }
+            function getTypeAtFlowCondition(flow) {
+                var type = getTypeAtFlowNode(flow.antecedent);
+                if (type !== neverType) {
+                    var assumeTrue = (flow.flags & 32) !== 0;
+                    type = narrowType(type, flow.expression, assumeTrue);
+                    if (type === neverType) {
+                        type = narrowType(declaredType, flow.expression, assumeTrue);
+                    }
+                }
+                return type;
+            }
+            function getTypeAtFlowBranchLabel(flow) {
+                var antecedentTypes = [];
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    var type = getTypeAtFlowNode(antecedent);
+                    if (type === declaredType && declaredType === initialType) {
+                        return type;
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                }
+                return getUnionType(antecedentTypes);
+            }
+            function getTypeAtFlowLoopLabel(flow) {
+                var id = getFlowNodeId(flow);
+                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = {});
+                if (!key) {
+                    key = getFlowCacheKey(reference);
+                }
+                if (cache[key]) {
+                    return cache[key];
+                }
+                for (var i = flowLoopStart; i < flowLoopCount; i++) {
+                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key) {
+                        return getUnionType(flowLoopTypes[i]);
+                    }
+                }
+                var antecedentTypes = [];
+                flowLoopNodes[flowLoopCount] = flow;
+                flowLoopKeys[flowLoopCount] = key;
+                flowLoopTypes[flowLoopCount] = antecedentTypes;
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    flowLoopCount++;
+                    var type = getTypeAtFlowNode(antecedent);
+                    flowLoopCount--;
+                    if (cache[key]) {
+                        return cache[key];
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                    if (type === declaredType) {
+                        break;
+                    }
+                }
+                return cache[key] = getUnionType(antecedentTypes);
+            }
+            function narrowTypeByTruthiness(type, expr, assumeTrue) {
+                return isMatchingReference(reference, expr) ? getTypeWithFacts(type, assumeTrue ? 1048576 : 2097152) : type;
+            }
+            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
+                switch (expr.operatorToken.kind) {
+                    case 56:
+                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
+                    case 30:
+                    case 31:
+                    case 32:
+                    case 33:
+                        if (isNullOrUndefinedLiteral(expr.right)) {
+                            return narrowTypeByNullCheck(type, expr, assumeTrue);
+                        }
+                        if (expr.left.kind === 182 && expr.right.kind === 9) {
+                            return narrowTypeByTypeof(type, expr, assumeTrue);
+                        }
+                        break;
+                    case 91:
+                        return narrowTypeByInstanceof(type, expr, assumeTrue);
+                    case 24:
+                        return narrowType(type, expr.right, assumeTrue);
+                }
+                return type;
+            }
+            function narrowTypeByNullCheck(type, expr, assumeTrue) {
+                var operator = expr.operatorToken.kind;
+                if (operator === 31 || operator === 33) {
+                    assumeTrue = !assumeTrue;
+                }
+                if (!strictNullChecks || !isMatchingReference(reference, getReferenceFromExpression(expr.left))) {
+                    return type;
+                }
+                var doubleEquals = operator === 30 || operator === 31;
+                var facts = doubleEquals ?
+                    assumeTrue ? 65536 : 524288 :
+                    expr.right.kind === 93 ?
+                        assumeTrue ? 32768 : 262144 :
+                        assumeTrue ? 16384 : 131072;
+                return getTypeWithFacts(type, facts);
+            }
+            function narrowTypeByTypeof(type, expr, assumeTrue) {
+                var left = getReferenceFromExpression(expr.left.expression);
+                var right = expr.right;
+                if (!isMatchingReference(reference, left)) {
+                    if (containsMatchingReference(reference, left)) {
+                        return declaredType;
+                    }
+                    return type;
+                }
+                if (expr.operatorToken.kind === 31 ||
+                    expr.operatorToken.kind === 33) {
+                    assumeTrue = !assumeTrue;
+                }
+                if (assumeTrue && !(type.flags & 16384)) {
+                    var targetType = ts.getProperty(typeofTypesByName, right.text);
+                    if (targetType && isTypeSubtypeOf(targetType, type)) {
+                        return targetType;
+                    }
+                }
+                var facts = assumeTrue ?
+                    ts.getProperty(typeofEQFacts, right.text) || 64 :
+                    ts.getProperty(typeofNEFacts, right.text) || 8192;
+                return getTypeWithFacts(type, facts);
+            }
+            function narrowTypeByInstanceof(type, expr, assumeTrue) {
+                var left = getReferenceFromExpression(expr.left);
+                if (!isMatchingReference(reference, left)) {
+                    if (containsMatchingReference(reference, left)) {
+                        return declaredType;
+                    }
+                    return type;
+                }
+                if (isTypeAny(type)) {
+                    return type;
+                }
+                var rightType = checkExpression(expr.right);
+                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
+                    return type;
+                }
+                var targetType;
+                var prototypeProperty = getPropertyOfType(rightType, "prototype");
+                if (prototypeProperty) {
+                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
+                    if (!isTypeAny(prototypePropertyType)) {
+                        targetType = prototypePropertyType;
+                    }
+                }
+                if (!targetType) {
+                    var constructSignatures = void 0;
+                    if (rightType.flags & 2048) {
+                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
+                    }
+                    else if (rightType.flags & 65536) {
+                        constructSignatures = getSignaturesOfType(rightType, 1);
+                    }
+                    if (constructSignatures && constructSignatures.length) {
+                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
+                    }
+                }
+                if (targetType) {
+                    return getNarrowedType(type, targetType, assumeTrue);
+                }
+                return type;
+            }
+            function getNarrowedType(type, candidate, assumeTrue) {
+                if (!assumeTrue) {
+                    return type.flags & 16384 ?
+                        getUnionType(ts.filter(type.types, function (t) { return !isTypeSubtypeOf(t, candidate); })) :
+                        type;
+                }
+                if (type.flags & 16384) {
+                    var assignableConstituents = ts.filter(type.types, function (t) { return isTypeAssignableTo(t, candidate); });
+                    if (assignableConstituents.length) {
+                        return getUnionType(assignableConstituents);
+                    }
+                }
+                var targetType = type.flags & 512 ? getApparentType(type) : type;
+                return isTypeAssignableTo(candidate, targetType) ? candidate :
+                    isTypeAssignableTo(type, candidate) ? type :
+                        getIntersectionType([type, candidate]);
+            }
+            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
+                if (type.flags & 1 || !hasMatchingArgument(callExpression, reference)) {
+                    return type;
+                }
+                var signature = getResolvedSignature(callExpression);
+                var predicate = signature.typePredicate;
+                if (!predicate) {
+                    return type;
+                }
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    var predicateArgument = callExpression.arguments[predicate.parameterIndex];
+                    if (predicateArgument) {
+                        if (isMatchingReference(reference, predicateArgument)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue);
+                        }
+                        if (containsMatchingReference(reference, predicateArgument)) {
+                            return declaredType;
+                        }
+                    }
+                }
+                else {
+                    var invokedExpression = skipParenthesizedNodes(callExpression.expression);
+                    if (invokedExpression.kind === 173 || invokedExpression.kind === 172) {
+                        var accessExpression = invokedExpression;
+                        var possibleReference = skipParenthesizedNodes(accessExpression.expression);
+                        if (isMatchingReference(reference, possibleReference)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue);
+                        }
+                        if (containsMatchingReference(reference, possibleReference)) {
+                            return declaredType;
+                        }
+                    }
+                }
+                return type;
+            }
+            function narrowType(type, expr, assumeTrue) {
+                switch (expr.kind) {
+                    case 69:
+                    case 97:
+                    case 172:
+                        return narrowTypeByTruthiness(type, expr, assumeTrue);
+                    case 174:
+                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
+                    case 178:
+                        return narrowType(type, expr.expression, assumeTrue);
+                    case 187:
+                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
+                    case 185:
+                        if (expr.operator === 49) {
+                            return narrowType(type, expr.operand, !assumeTrue);
+                        }
+                        break;
+                }
+                return type;
+            }
+        }
+        function getTypeOfSymbolAtLocation(symbol, location) {
+            if (location.kind === 69) {
+                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
+                    location = location.parent;
+                }
+                if (ts.isExpression(location) && !ts.isAssignmentTarget(location)) {
+                    var type = checkExpression(location);
+                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
+                        return type;
+                    }
+                }
+            }
+            return getTypeOfSymbol(symbol);
+        }
+        function skipParenthesizedNodes(expression) {
+            while (expression.kind === 178) {
+                expression = expression.expression;
+            }
+            return expression;
+        }
+        function getControlFlowContainer(node) {
+            while (true) {
+                node = node.parent;
+                if (ts.isFunctionLike(node) || node.kind === 226 || node.kind === 256 || node.kind === 145) {
+                    return node;
+                }
+            }
+        }
+        function isDeclarationIncludedInFlow(reference, declaration, includeOuterFunctions) {
+            var declarationContainer = getControlFlowContainer(declaration);
+            var container = getControlFlowContainer(reference);
+            while (container !== declarationContainer &&
+                (container.kind === 179 || container.kind === 180) &&
+                (includeOuterFunctions || ts.getImmediatelyInvokedFunctionExpression(container))) {
+                container = getControlFlowContainer(container);
+            }
+            return container === declarationContainer;
+        }
+        function checkIdentifier(node) {
+            var symbol = getResolvedSymbol(node);
+            if (symbol === argumentsSymbol) {
+                var container = ts.getContainingFunction(node);
+                if (container.kind === 180) {
+                    if (languageVersion < 2) {
+                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
+                    }
+                }
+                if (node.flags & 33554432) {
+                    getNodeLinks(container).flags |= 8192;
+                }
+            }
+            if (symbol.flags & 8388608 && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
+                markAliasSymbolAsReferenced(symbol);
+            }
+            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
+            if (languageVersion === 2
+                && localOrExportSymbol.flags & 32
+                && localOrExportSymbol.valueDeclaration.kind === 221
+                && ts.nodeIsDecorated(localOrExportSymbol.valueDeclaration)) {
+                var container = ts.getContainingClass(node);
+                while (container !== undefined) {
+                    if (container === localOrExportSymbol.valueDeclaration && container.name !== node) {
+                        getNodeLinks(container).flags |= 524288;
+                        getNodeLinks(node).flags |= 1048576;
+                        break;
+                    }
+                    container = ts.getContainingClass(container);
+                }
+            }
+            checkCollisionWithCapturedSuperVariable(node, node);
+            checkCollisionWithCapturedThisVariable(node, node);
+            checkNestedBlockScopedBinding(node, symbol);
+            var type = getTypeOfSymbol(localOrExportSymbol);
+            if (!(localOrExportSymbol.flags & 3) || ts.isAssignmentTarget(node)) {
+                return type;
+            }
+            var declaration = localOrExportSymbol.valueDeclaration;
+            var includeOuterFunctions = isReadonlySymbol(localOrExportSymbol);
+            var assumeInitialized = !strictNullChecks || (type.flags & 1) !== 0 || !declaration ||
+                ts.getRootDeclaration(declaration).kind === 142 || ts.isInAmbientContext(declaration) ||
+                !isDeclarationIncludedInFlow(node, declaration, includeOuterFunctions);
+            var flowType = getFlowTypeOfReference(node, type, assumeInitialized, includeOuterFunctions);
+            if (!assumeInitialized && !(getCombinedTypeFlags(type) & 32) && getCombinedTypeFlags(flowType) & 32) {
+                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
+                return type;
+            }
+            return flowType;
+        }
+        function isInsideFunction(node, threshold) {
+            var current = node;
+            while (current && current !== threshold) {
+                if (ts.isFunctionLike(current)) {
+                    return true;
+                }
+                current = current.parent;
+            }
+            return false;
+        }
+        function checkNestedBlockScopedBinding(node, symbol) {
+            if (languageVersion >= 2 ||
+                (symbol.flags & (2 | 32)) === 0 ||
+                symbol.valueDeclaration.parent.kind === 252) {
+                return;
+            }
+            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+            var usedInFunction = isInsideFunction(node.parent, container);
+            var current = container;
+            var containedInIterationStatement = false;
+            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
+                if (ts.isIterationStatement(current, false)) {
+                    containedInIterationStatement = true;
+                    break;
+                }
+                current = current.parent;
+            }
+            if (containedInIterationStatement) {
+                if (usedInFunction) {
+                    getNodeLinks(current).flags |= 65536;
+                }
+                if (container.kind === 206 &&
+                    ts.getAncestor(symbol.valueDeclaration, 219).parent === container &&
+                    isAssignedInBodyOfForStatement(node, container)) {
+                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152;
+                }
+                getNodeLinks(symbol.valueDeclaration).flags |= 262144;
+            }
+            if (usedInFunction) {
+                getNodeLinks(symbol.valueDeclaration).flags |= 131072;
+            }
+        }
+        function isAssignedInBodyOfForStatement(node, container) {
+            var current = node;
+            while (current.parent.kind === 178) {
+                current = current.parent;
+            }
+            var isAssigned = false;
+            if (ts.isAssignmentTarget(current)) {
+                isAssigned = true;
+            }
+            else if ((current.parent.kind === 185 || current.parent.kind === 186)) {
+                var expr = current.parent;
+                isAssigned = expr.operator === 41 || expr.operator === 42;
+            }
+            if (!isAssigned) {
+                return false;
+            }
+            while (current !== container) {
+                if (current === container.statement) {
+                    return true;
+                }
+                else {
+                    current = current.parent;
+                }
+            }
+            return false;
+        }
+        function captureLexicalThis(node, container) {
+            getNodeLinks(node).flags |= 2;
+            if (container.kind === 145 || container.kind === 148) {
+                var classNode = container.parent;
+                getNodeLinks(classNode).flags |= 4;
+            }
+            else {
+                getNodeLinks(container).flags |= 4;
+            }
+        }
+        function findFirstSuperCall(n) {
+            if (ts.isSuperCallExpression(n)) {
+                return n;
+            }
+            else if (ts.isFunctionLike(n)) {
+                return undefined;
+            }
+            return ts.forEachChild(n, findFirstSuperCall);
+        }
+        function getSuperCallInConstructor(constructor) {
+            var links = getNodeLinks(constructor);
+            if (links.hasSuperCall === undefined) {
+                links.superCall = findFirstSuperCall(constructor.body);
+                links.hasSuperCall = links.superCall ? true : false;
+            }
+            return links.superCall;
+        }
+        function classDeclarationExtendsNull(classDecl) {
+            var classSymbol = getSymbolOfNode(classDecl);
+            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
+            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
+            return baseConstructorType === nullWideningType;
+        }
+        function checkThisExpression(node) {
+            var container = ts.getThisContainer(node, true);
+            var needToCaptureLexicalThis = false;
+            if (container.kind === 148) {
+                var containingClassDecl = container.parent;
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
+                if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
+                    var superCall = getSuperCallInConstructor(container);
+                    if (!superCall || superCall.end > node.pos) {
+                        error(node, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
+                    }
+                }
+            }
+            if (container.kind === 180) {
+                container = ts.getThisContainer(container, false);
+                needToCaptureLexicalThis = (languageVersion < 2);
+            }
+            switch (container.kind) {
+                case 225:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
+                    break;
+                case 224:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                    break;
+                case 148:
+                    if (isInConstructorArgumentInitializer(node, container)) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
+                    }
+                    break;
+                case 145:
+                case 144:
+                    if (container.flags & 32) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
+                    }
+                    break;
+                case 140:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
+                    break;
+            }
+            if (needToCaptureLexicalThis) {
+                captureLexicalThis(node, container);
+            }
+            if (ts.isFunctionLike(container) &&
+                (!isInParameterInitializerBeforeContainingFunction(node) || getFunctionLikeThisParameter(container))) {
+                if (container.kind === 179 &&
+                    ts.isInJavaScriptFile(container.parent) &&
+                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3) {
+                    var className = container.parent
+                        .left
+                        .expression
+                        .expression;
+                    var classSymbol = checkExpression(className).symbol;
+                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16)) {
+                        return getInferredClassType(classSymbol);
+                    }
+                }
+                var type = getContextuallyTypedThisType(container);
+                if (type) {
+                    return type;
+                }
+                var signature = getSignatureFromDeclaration(container);
+                if (signature.thisType) {
+                    return signature.thisType;
+                }
+            }
+            if (ts.isClassLike(container.parent)) {
+                var symbol = getSymbolOfNode(container.parent);
+                var type = container.flags & 32 ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
+                return getFlowTypeOfReference(node, type, true, true);
+            }
+            if (ts.isInJavaScriptFile(node)) {
+                var type = getTypeForThisExpressionFromJSDoc(container);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            if (compilerOptions.noImplicitThis) {
+                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
+            }
+            return anyType;
+        }
+        function getTypeForThisExpressionFromJSDoc(node) {
+            var typeTag = ts.getJSDocTypeTag(node);
+            if (typeTag && typeTag.typeExpression && typeTag.typeExpression.type && typeTag.typeExpression.type.kind === 269) {
+                var jsDocFunctionType = typeTag.typeExpression.type;
+                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 272) {
+                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
+                }
+            }
+        }
+        function isInConstructorArgumentInitializer(node, constructorDecl) {
+            for (var n = node; n && n !== constructorDecl; n = n.parent) {
+                if (n.kind === 142) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkSuperExpression(node) {
+            var isCallExpression = node.parent.kind === 174 && node.parent.expression === node;
+            var container = ts.getSuperContainer(node, true);
+            var needToCaptureLexicalThis = false;
+            if (!isCallExpression) {
+                while (container && container.kind === 180) {
+                    container = ts.getSuperContainer(container, true);
+                    needToCaptureLexicalThis = languageVersion < 2;
+                }
+            }
+            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
+            var nodeCheckFlag = 0;
+            if (!canUseSuperExpression) {
+                var current = node;
+                while (current && current !== container && current.kind !== 140) {
+                    current = current.parent;
+                }
+                if (current && current.kind === 140) {
+                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
+                }
+                else if (isCallExpression) {
+                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
+                }
+                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 171)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
+                }
+                else {
+                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
+                }
+                return unknownType;
+            }
+            if ((container.flags & 32) || isCallExpression) {
+                nodeCheckFlag = 512;
+            }
+            else {
+                nodeCheckFlag = 256;
+            }
+            getNodeLinks(node).flags |= nodeCheckFlag;
+            if (container.kind === 147 && container.flags & 256) {
+                if (ts.isSuperPropertyOrElementAccess(node.parent) && ts.isAssignmentTarget(node.parent)) {
+                    getNodeLinks(container).flags |= 4096;
+                }
+                else {
+                    getNodeLinks(container).flags |= 2048;
+                }
+            }
+            if (needToCaptureLexicalThis) {
+                captureLexicalThis(node.parent, container);
+            }
+            if (container.parent.kind === 171) {
+                if (languageVersion < 2) {
+                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
+                    return unknownType;
+                }
+                else {
+                    return anyType;
+                }
+            }
+            var classLikeDeclaration = container.parent;
+            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
+            var baseClassType = classType && getBaseTypes(classType)[0];
+            if (!baseClassType) {
+                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
+                }
+                return unknownType;
+            }
+            if (container.kind === 148 && isInConstructorArgumentInitializer(node, container)) {
+                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
+                return unknownType;
+            }
+            return nodeCheckFlag === 512
+                ? getBaseConstructorTypeOfClass(classType)
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
+            function isLegalUsageOfSuperExpression(container) {
+                if (!container) {
+                    return false;
+                }
+                if (isCallExpression) {
+                    return container.kind === 148;
+                }
+                else {
+                    if (ts.isClassLike(container.parent) || container.parent.kind === 171) {
+                        if (container.flags & 32) {
+                            return container.kind === 147 ||
+                                container.kind === 146 ||
+                                container.kind === 149 ||
+                                container.kind === 150;
+                        }
+                        else {
+                            return container.kind === 147 ||
+                                container.kind === 146 ||
+                                container.kind === 149 ||
+                                container.kind === 150 ||
+                                container.kind === 145 ||
+                                container.kind === 144 ||
+                                container.kind === 148;
+                        }
+                    }
+                }
+                return false;
+            }
+        }
+        function getContextuallyTypedThisType(func) {
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func) && func.kind !== 180) {
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    return contextualSignature.thisType;
+                }
+            }
+            return undefined;
+        }
+        function getContextuallyTypedParameterType(parameter) {
+            var func = parameter.parent;
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
+                var iife = ts.getImmediatelyInvokedFunctionExpression(func);
+                if (iife) {
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
+                        if (parameter.dotDotDotToken) {
+                            var restTypes = [];
+                            for (var i = indexOfParameter; i < iife.arguments.length; i++) {
+                                restTypes.push(getTypeOfExpression(iife.arguments[i]));
+                            }
+                            return createArrayType(getUnionType(restTypes));
+                        }
+                        var links = getNodeLinks(iife);
+                        var cached = links.resolvedSignature;
+                        links.resolvedSignature = anySignature;
+                        var type = checkExpression(iife.arguments[indexOfParameter]);
+                        links.resolvedSignature = cached;
+                        return type;
+                    }
+                }
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    var funcHasRestParameters = ts.hasRestParameter(func);
+                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (indexOfParameter < len) {
+                        return getTypeAtPosition(contextualSignature, indexOfParameter);
+                    }
+                    if (funcHasRestParameters &&
+                        indexOfParameter === (func.parameters.length - 1) &&
+                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
+                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
+                    }
+                }
+            }
+            return undefined;
+        }
+        function getContextualTypeForInitializerExpression(node) {
+            var declaration = node.parent;
+            if (node === declaration.initializer) {
+                if (declaration.type) {
+                    return getTypeFromTypeNode(declaration.type);
+                }
+                if (declaration.kind === 142) {
+                    var type = getContextuallyTypedParameterType(declaration);
+                    if (type) {
+                        return type;
+                    }
+                }
+                if (ts.isBindingPattern(declaration.name)) {
+                    return getTypeFromBindingPattern(declaration.name, true);
+                }
+                if (ts.isBindingPattern(declaration.parent)) {
+                    var parentDeclaration = declaration.parent.parent;
+                    var name_12 = declaration.propertyName || declaration.name;
+                    if (ts.isVariableLike(parentDeclaration) &&
+                        parentDeclaration.type &&
+                        !ts.isBindingPattern(name_12)) {
+                        var text = getTextOfPropertyName(name_12);
+                        if (text) {
+                            return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text);
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function getContextualTypeForReturnExpression(node) {
+            var func = ts.getContainingFunction(node);
+            if (ts.isAsyncFunctionLike(func)) {
+                var contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return getPromisedType(contextualReturnType);
+                }
+                return undefined;
+            }
+            if (func && !func.asteriskToken) {
+                return getContextualReturnType(func);
+            }
+            return undefined;
+        }
+        function getContextualTypeForYieldOperand(node) {
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return node.asteriskToken
+                        ? contextualReturnType
+                        : getElementTypeOfIterableIterator(contextualReturnType);
+                }
+            }
+            return undefined;
+        }
+        function isInParameterInitializerBeforeContainingFunction(node) {
+            while (node.parent && !ts.isFunctionLike(node.parent)) {
+                if (node.parent.kind === 142 && node.parent.initializer === node) {
+                    return true;
+                }
+                node = node.parent;
+            }
+            return false;
+        }
+        function getContextualReturnType(functionDecl) {
+            if (functionDecl.type ||
+                functionDecl.kind === 148 ||
+                functionDecl.kind === 149 && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(functionDecl.symbol, 150))) {
+                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
+            }
+            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
+            if (signature) {
+                return getReturnTypeOfSignature(signature);
+            }
+            return undefined;
+        }
+        function getContextualTypeForArgument(callTarget, arg) {
+            var args = getEffectiveCallArguments(callTarget);
+            var argIndex = ts.indexOf(args, arg);
+            if (argIndex >= 0) {
+                var signature = getResolvedOrAnySignature(callTarget);
+                return getTypeAtPosition(signature, argIndex);
+            }
+            return undefined;
+        }
+        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
+            if (template.parent.kind === 176) {
+                return getContextualTypeForArgument(template.parent, substitutionExpression);
+            }
+            return undefined;
+        }
+        function getContextualTypeForBinaryOperand(node) {
+            var binaryExpression = node.parent;
+            var operator = binaryExpression.operatorToken.kind;
+            if (operator >= 56 && operator <= 68) {
+                if (node === binaryExpression.right) {
+                    return checkExpression(binaryExpression.left);
+                }
+            }
+            else if (operator === 52) {
+                var type = getContextualType(binaryExpression);
+                if (!type && node === binaryExpression.right) {
+                    type = checkExpression(binaryExpression.left);
+                }
+                return type;
+            }
+            else if (operator === 51 || operator === 24) {
+                if (node === binaryExpression.right) {
+                    return getContextualType(binaryExpression);
+                }
+            }
+            return undefined;
+        }
+        function applyToContextualType(type, mapper) {
+            if (!(type.flags & 16384)) {
+                return mapper(type);
+            }
+            var types = type.types;
+            var mappedType;
+            var mappedTypes;
+            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
+                var current = types_8[_i];
+                var t = mapper(current);
+                if (t) {
+                    if (!mappedType) {
+                        mappedType = t;
+                    }
+                    else if (!mappedTypes) {
+                        mappedTypes = [mappedType, t];
+                    }
+                    else {
+                        mappedTypes.push(t);
+                    }
+                }
+            }
+            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
+        }
+        function getTypeOfPropertyOfContextualType(type, name) {
+            return applyToContextualType(type, function (t) {
+                var prop = t.flags & 130048 ? getPropertyOfType(t, name) : undefined;
+                return prop ? getTypeOfSymbol(prop) : undefined;
+            });
+        }
+        function getIndexTypeOfContextualType(type, kind) {
+            return applyToContextualType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
+        }
+        function contextualTypeIsStringLiteralType(type) {
+            return !!(type.flags & 16384 ? ts.forEach(type.types, isStringLiteralType) : isStringLiteralType(type));
+        }
+        function contextualTypeIsTupleLikeType(type) {
+            return !!(type.flags & 16384 ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
+        }
+        function getContextualTypeForObjectLiteralMethod(node) {
+            ts.Debug.assert(ts.isObjectLiteralMethod(node));
+            if (isInsideWithStatementBody(node)) {
+                return undefined;
+            }
+            return getContextualTypeForObjectLiteralElement(node);
+        }
+        function getContextualTypeForObjectLiteralElement(element) {
+            var objectLiteral = element.parent;
+            var type = getApparentTypeOfContextualType(objectLiteral);
+            if (type) {
+                if (!ts.hasDynamicName(element)) {
+                    var symbolName = getSymbolOfNode(element).name;
+                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
+                    if (propertyType) {
+                        return propertyType;
+                    }
+                }
+                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1) ||
+                    getIndexTypeOfContextualType(type, 0);
+            }
+            return undefined;
+        }
+        function getContextualTypeForElementExpression(node) {
+            var arrayLiteral = node.parent;
+            var type = getApparentTypeOfContextualType(arrayLiteral);
+            if (type) {
+                var index = ts.indexOf(arrayLiteral.elements, node);
+                return getTypeOfPropertyOfContextualType(type, "" + index)
+                    || getIndexTypeOfContextualType(type, 1)
+                    || (languageVersion >= 2 ? getElementTypeOfIterable(type, undefined) : undefined);
+            }
+            return undefined;
+        }
+        function getContextualTypeForConditionalOperand(node) {
+            var conditional = node.parent;
+            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
+        }
+        function getContextualTypeForJsxAttribute(attribute) {
+            var kind = attribute.kind;
+            var jsxElement = attribute.parent;
+            var attrsType = getJsxElementAttributesType(jsxElement);
+            if (attribute.kind === 246) {
+                if (!attrsType || isTypeAny(attrsType)) {
+                    return undefined;
+                }
+                return getTypeOfPropertyOfType(attrsType, attribute.name.text);
+            }
+            else if (attribute.kind === 247) {
+                return attrsType;
+            }
+            ts.Debug.fail("Expected JsxAttribute or JsxSpreadAttribute, got ts.SyntaxKind[" + kind + "]");
+        }
+        function getApparentTypeOfContextualType(node) {
+            var type = getContextualType(node);
+            return type && getApparentType(type);
+        }
+        function getContextualType(node) {
+            if (isInsideWithStatementBody(node)) {
+                return undefined;
+            }
+            if (node.contextualType) {
+                return node.contextualType;
+            }
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 218:
+                case 142:
+                case 145:
+                case 144:
+                case 169:
+                    return getContextualTypeForInitializerExpression(node);
+                case 180:
+                case 211:
+                    return getContextualTypeForReturnExpression(node);
+                case 190:
+                    return getContextualTypeForYieldOperand(parent);
+                case 174:
+                case 175:
+                    return getContextualTypeForArgument(parent, node);
+                case 177:
+                case 195:
+                    return getTypeFromTypeNode(parent.type);
+                case 187:
+                    return getContextualTypeForBinaryOperand(node);
+                case 253:
+                    return getContextualTypeForObjectLiteralElement(parent);
+                case 170:
+                    return getContextualTypeForElementExpression(node);
+                case 188:
+                    return getContextualTypeForConditionalOperand(node);
+                case 197:
+                    ts.Debug.assert(parent.parent.kind === 189);
+                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
+                case 178:
+                    return getContextualType(parent);
+                case 248:
+                    return getContextualType(parent);
+                case 246:
+                case 247:
+                    return getContextualTypeForJsxAttribute(parent);
+            }
+            return undefined;
+        }
+        function getNonGenericSignature(type) {
+            var signatures = getSignaturesOfStructuredType(type, 0);
+            if (signatures.length === 1) {
+                var signature = signatures[0];
+                if (!signature.typeParameters) {
+                    return signature;
+                }
+            }
+        }
+        function isFunctionExpressionOrArrowFunction(node) {
+            return node.kind === 179 || node.kind === 180;
+        }
+        function getContextualSignatureForFunctionLikeDeclaration(node) {
+            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
+                ? getContextualSignature(node)
+                : undefined;
+        }
+        function getContextualTypeForFunctionLikeDeclaration(node) {
+            return ts.isObjectLiteralMethod(node) ?
+                getContextualTypeForObjectLiteralMethod(node) :
+                getApparentTypeOfContextualType(node);
+        }
+        function getContextualSignature(node) {
+            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
+            var type = getContextualTypeForFunctionLikeDeclaration(node);
+            if (!type) {
+                return undefined;
+            }
+            if (!(type.flags & 16384)) {
+                return getNonGenericSignature(type);
+            }
+            var signatureList;
+            var types = type.types;
+            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
+                var current = types_9[_i];
+                var signature = getNonGenericSignature(current);
+                if (signature) {
+                    if (!signatureList) {
+                        signatureList = [signature];
+                    }
+                    else if (!compareSignaturesIdentical(signatureList[0], signature, false, true, true, compareTypesIdentical)) {
+                        return undefined;
+                    }
+                    else {
+                        signatureList.push(signature);
+                    }
+                }
+            }
+            var result;
+            if (signatureList) {
+                result = cloneSignature(signatureList[0]);
+                result.resolvedReturnType = undefined;
+                result.unionSignatures = signatureList;
+            }
+            return result;
+        }
+        function isInferentialContext(mapper) {
+            return mapper && mapper.context;
+        }
+        function checkSpreadElementExpression(node, contextualMapper) {
+            var arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
+            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, false);
+        }
+        function hasDefaultValue(node) {
+            return (node.kind === 169 && !!node.initializer) ||
+                (node.kind === 187 && node.operatorToken.kind === 56);
+        }
+        function checkArrayLiteral(node, contextualMapper) {
+            var elements = node.elements;
+            var hasSpreadElement = false;
+            var elementTypes = [];
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
+                var e = elements_1[_i];
+                if (inDestructuringPattern && e.kind === 191) {
+                    var restArrayType = checkExpression(e.expression, contextualMapper);
+                    var restElementType = getIndexTypeOfType(restArrayType, 1) ||
+                        (languageVersion >= 2 ? getElementTypeOfIterable(restArrayType, undefined) : undefined);
+                    if (restElementType) {
+                        elementTypes.push(restElementType);
+                    }
+                }
+                else {
+                    var type = checkExpression(e, contextualMapper);
+                    elementTypes.push(type);
+                }
+                hasSpreadElement = hasSpreadElement || e.kind === 191;
+            }
+            if (!hasSpreadElement) {
+                if (inDestructuringPattern && elementTypes.length) {
+                    var type = createNewTupleType(elementTypes);
+                    type.pattern = node;
+                    return type;
+                }
+                var contextualType = getApparentTypeOfContextualType(node);
+                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
+                    var pattern = contextualType.pattern;
+                    if (pattern && (pattern.kind === 168 || pattern.kind === 170)) {
+                        var patternElements = pattern.elements;
+                        for (var i = elementTypes.length; i < patternElements.length; i++) {
+                            var patternElement = patternElements[i];
+                            if (hasDefaultValue(patternElement)) {
+                                elementTypes.push(contextualType.elementTypes[i]);
+                            }
+                            else {
+                                if (patternElement.kind !== 193) {
+                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                                }
+                                elementTypes.push(unknownType);
+                            }
+                        }
+                    }
+                    if (elementTypes.length) {
+                        return createTupleType(elementTypes);
+                    }
+                }
+            }
+            return createArrayType(elementTypes.length ? getUnionType(elementTypes) : strictNullChecks ? neverType : undefinedWideningType);
+        }
+        function isNumericName(name) {
+            return name.kind === 140 ? isNumericComputedName(name) : isNumericLiteralName(name.text);
+        }
+        function isNumericComputedName(name) {
+            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 132);
+        }
+        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
+            return isTypeAny(type) || isTypeOfKind(type, kind);
+        }
+        function isNumericLiteralName(name) {
+            return (+name).toString() === name;
+        }
+        function checkComputedPropertyName(node) {
+            var links = getNodeLinks(node.expression);
+            if (!links.resolvedType) {
+                links.resolvedType = checkExpression(node.expression);
+                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 132 | 258 | 16777216)) {
+                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
+                }
+                else {
+                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, true);
+                }
+            }
+            return links.resolvedType;
+        }
+        function getObjectLiteralIndexInfo(node, properties, kind) {
+            var propTypes = [];
+            for (var i = 0; i < properties.length; i++) {
+                if (kind === 0 || isNumericName(node.properties[i].name)) {
+                    propTypes.push(getTypeOfSymbol(properties[i]));
+                }
+            }
+            var unionType = propTypes.length ? getUnionType(propTypes) : undefinedType;
+            return createIndexInfo(unionType, false);
+        }
+        function checkObjectLiteral(node, contextualMapper) {
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
+            var propertiesTable = {};
+            var propertiesArray = [];
+            var contextualType = getApparentTypeOfContextualType(node);
+            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
+                (contextualType.pattern.kind === 167 || contextualType.pattern.kind === 171);
+            var typeFlags = 0;
+            var patternWithComputedProperties = false;
+            var hasComputedStringProperty = false;
+            var hasComputedNumberProperty = false;
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var memberDecl = _a[_i];
+                var member = memberDecl.symbol;
+                if (memberDecl.kind === 253 ||
+                    memberDecl.kind === 254 ||
+                    ts.isObjectLiteralMethod(memberDecl)) {
+                    var type = void 0;
+                    if (memberDecl.kind === 253) {
+                        type = checkPropertyAssignment(memberDecl, contextualMapper);
+                    }
+                    else if (memberDecl.kind === 147) {
+                        type = checkObjectLiteralMethod(memberDecl, contextualMapper);
+                    }
+                    else {
+                        ts.Debug.assert(memberDecl.kind === 254);
+                        type = checkExpression(memberDecl.name, contextualMapper);
+                    }
+                    typeFlags |= type.flags;
+                    var prop = createSymbol(4 | 67108864 | member.flags, member.name);
+                    if (inDestructuringPattern) {
+                        var isOptional = (memberDecl.kind === 253 && hasDefaultValue(memberDecl.initializer)) ||
+                            (memberDecl.kind === 254 && memberDecl.objectAssignmentInitializer);
+                        if (isOptional) {
+                            prop.flags |= 536870912;
+                        }
+                        if (ts.hasDynamicName(memberDecl)) {
+                            patternWithComputedProperties = true;
+                        }
+                    }
+                    else if (contextualTypeHasPattern && !(contextualType.flags & 67108864)) {
+                        var impliedProp = getPropertyOfType(contextualType, member.name);
+                        if (impliedProp) {
+                            prop.flags |= impliedProp.flags & 536870912;
+                        }
+                        else if (!compilerOptions.suppressExcessPropertyErrors) {
+                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
+                        }
+                    }
+                    prop.declarations = member.declarations;
+                    prop.parent = member.parent;
+                    if (member.valueDeclaration) {
+                        prop.valueDeclaration = member.valueDeclaration;
+                    }
+                    prop.type = type;
+                    prop.target = member;
+                    member = prop;
+                }
+                else {
+                    ts.Debug.assert(memberDecl.kind === 149 || memberDecl.kind === 150);
+                    checkAccessorDeclaration(memberDecl);
+                }
+                if (ts.hasDynamicName(memberDecl)) {
+                    if (isNumericName(memberDecl.name)) {
+                        hasComputedNumberProperty = true;
+                    }
+                    else {
+                        hasComputedStringProperty = true;
+                    }
+                }
+                else {
+                    propertiesTable[member.name] = member;
+                }
+                propertiesArray.push(member);
+            }
+            if (contextualTypeHasPattern) {
+                for (var _b = 0, _c = getPropertiesOfType(contextualType); _b < _c.length; _b++) {
+                    var prop = _c[_b];
+                    if (!ts.hasProperty(propertiesTable, prop.name)) {
+                        if (!(prop.flags & 536870912)) {
+                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                        }
+                        propertiesTable[prop.name] = prop;
+                        propertiesArray.push(prop);
+                    }
+                }
+            }
+            var stringIndexInfo = hasComputedStringProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 0) : undefined;
+            var numberIndexInfo = hasComputedNumberProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 1) : undefined;
+            var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
+            var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576;
+            result.flags |= 524288 | 4194304 | freshObjectLiteralFlag | (typeFlags & 14680064) | (patternWithComputedProperties ? 67108864 : 0);
+            if (inDestructuringPattern) {
+                result.pattern = node;
+            }
+            return result;
+        }
+        function checkJsxSelfClosingElement(node) {
+            checkJsxOpeningLikeElement(node);
+            return jsxElementType || anyType;
+        }
+        function checkJsxElement(node) {
+            checkJsxOpeningLikeElement(node.openingElement);
+            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
+                getIntrinsicTagSymbol(node.closingElement);
+            }
+            else {
+                checkExpression(node.closingElement.tagName);
+            }
+            for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
+                var child = _a[_i];
+                switch (child.kind) {
+                    case 248:
+                        checkJsxExpression(child);
+                        break;
+                    case 241:
+                        checkJsxElement(child);
+                        break;
+                    case 242:
+                        checkJsxSelfClosingElement(child);
+                        break;
+                }
+            }
+            return jsxElementType || anyType;
+        }
+        function isUnhyphenatedJsxName(name) {
+            return name.indexOf("-") < 0;
+        }
+        function isJsxIntrinsicIdentifier(tagName) {
+            if (tagName.kind === 139) {
+                return false;
+            }
+            else {
+                return ts.isIntrinsicJsxName(tagName.text);
+            }
+        }
+        function checkJsxAttribute(node, elementAttributesType, nameTable) {
+            var correspondingPropType = undefined;
+            if (elementAttributesType === emptyObjectType && isUnhyphenatedJsxName(node.name.text)) {
+                error(node.parent, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
+            }
+            else if (elementAttributesType && !isTypeAny(elementAttributesType)) {
+                var correspondingPropSymbol = getPropertyOfType(elementAttributesType, node.name.text);
+                correspondingPropType = correspondingPropSymbol && getTypeOfSymbol(correspondingPropSymbol);
+                if (isUnhyphenatedJsxName(node.name.text)) {
+                    var indexerType = getIndexTypeOfType(elementAttributesType, 0);
+                    if (indexerType) {
+                        correspondingPropType = indexerType;
+                    }
+                    else {
+                        if (!correspondingPropType) {
+                            error(node.name, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.name.text, typeToString(elementAttributesType));
+                            return unknownType;
+                        }
+                    }
+                }
+            }
+            var exprType;
+            if (node.initializer) {
+                exprType = checkExpression(node.initializer);
+            }
+            else {
+                exprType = booleanType;
+            }
+            if (correspondingPropType) {
+                checkTypeAssignableTo(exprType, correspondingPropType, node);
+            }
+            nameTable[node.name.text] = true;
+            return exprType;
+        }
+        function checkJsxSpreadAttribute(node, elementAttributesType, nameTable) {
+            var type = checkExpression(node.expression);
+            var props = getPropertiesOfType(type);
+            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
+                var prop = props_2[_i];
+                if (!nameTable[prop.name]) {
+                    var targetPropSym = getPropertyOfType(elementAttributesType, prop.name);
+                    if (targetPropSym) {
+                        var msg = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property, prop.name);
+                        checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(targetPropSym), node, undefined, msg);
+                    }
+                    nameTable[prop.name] = true;
+                }
+            }
+            return type;
+        }
+        function getJsxType(name) {
+            if (jsxTypes[name] === undefined) {
+                return jsxTypes[name] = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType;
+            }
+            return jsxTypes[name];
+        }
+        function getIntrinsicTagSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
+                if (intrinsicElementsType !== unknownType) {
+                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
+                    if (intrinsicProp) {
+                        links.jsxFlags |= 1;
+                        return links.resolvedSymbol = intrinsicProp;
+                    }
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0);
+                    if (indexSignatureType) {
+                        links.jsxFlags |= 2;
+                        return links.resolvedSymbol = intrinsicElementsType.symbol;
+                    }
+                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
+                    return links.resolvedSymbol = unknownSymbol;
+                }
+                else {
+                    if (compilerOptions.noImplicitAny) {
+                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
+                    }
+                    return links.resolvedSymbol = unknownSymbol;
+                }
+            }
+            return links.resolvedSymbol;
+        }
+        function getJsxElementInstanceType(node, valueType) {
+            ts.Debug.assert(!(valueType.flags & 16384));
+            if (isTypeAny(valueType)) {
+                return anyType;
+            }
+            var signatures = getSignaturesOfType(valueType, 1);
+            if (signatures.length === 0) {
+                signatures = getSignaturesOfType(valueType, 0);
+                if (signatures.length === 0) {
+                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
+                    return unknownType;
+                }
+            }
+            return getUnionType(signatures.map(getReturnTypeOfSignature));
+        }
+        function getJsxElementPropertiesName() {
+            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1536, undefined);
+            var attribsPropTypeSym = jsxNamespace && getSymbol(jsxNamespace.exports, JsxNames.ElementAttributesPropertyNameContainer, 793056);
+            var attribPropType = attribsPropTypeSym && getDeclaredTypeOfSymbol(attribsPropTypeSym);
+            var attribProperties = attribPropType && getPropertiesOfType(attribPropType);
+            if (attribProperties) {
+                if (attribProperties.length === 0) {
+                    return "";
+                }
+                else if (attribProperties.length === 1) {
+                    return attribProperties[0].name;
+                }
+                else {
+                    error(attribsPropTypeSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, JsxNames.ElementAttributesPropertyNameContainer);
+                    return undefined;
+                }
+            }
+            else {
+                return undefined;
+            }
+        }
+        function getResolvedJsxType(node, elemType, elemClassType) {
+            if (!elemType) {
+                elemType = checkExpression(node.tagName);
+            }
+            if (elemType.flags & 16384) {
+                var types = elemType.types;
+                return getUnionType(types.map(function (type) {
+                    return getResolvedJsxType(node, type, elemClassType);
+                }));
+            }
+            var elemInstanceType = getJsxElementInstanceType(node, elemType);
+            if (!elemClassType || !isTypeAssignableTo(elemInstanceType, elemClassType)) {
+                if (jsxElementType) {
+                    var callSignatures = elemType && getSignaturesOfType(elemType, 0);
+                    var callSignature = callSignatures && callSignatures.length > 0 && callSignatures[0];
+                    var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
+                    var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                    if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType)) {
+                        var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
+                        if (intrinsicAttributes !== unknownType) {
+                            paramType = intersectTypes(intrinsicAttributes, paramType);
+                        }
+                        return paramType;
+                    }
+                }
+            }
+            if (elemClassType) {
+                checkTypeRelatedTo(elemInstanceType, elemClassType, assignableRelation, node, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
+            }
+            if (isTypeAny(elemInstanceType)) {
+                return elemInstanceType;
+            }
+            var propsName = getJsxElementPropertiesName();
+            if (propsName === undefined) {
+                return anyType;
+            }
+            else if (propsName === "") {
+                return elemInstanceType;
+            }
+            else {
+                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
+                if (!attributesType) {
+                    return emptyObjectType;
+                }
+                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
+                    return attributesType;
+                }
+                else if (attributesType.flags & 16384) {
+                    error(node.tagName, ts.Diagnostics.JSX_element_attributes_type_0_may_not_be_a_union_type, typeToString(attributesType));
+                    return anyType;
+                }
+                else {
+                    var apparentAttributesType = attributesType;
+                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
+                    if (intrinsicClassAttribs !== unknownType) {
+                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
+                        if (typeParams) {
+                            if (typeParams.length === 1) {
+                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
+                            }
+                        }
+                        else {
+                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
+                        }
+                    }
+                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
+                    if (intrinsicAttribs !== unknownType) {
+                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
+                    }
+                    return apparentAttributesType;
+                }
+            }
+        }
+        function getJsxElementAttributesType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedJsxType) {
+                if (isJsxIntrinsicIdentifier(node.tagName)) {
+                    var symbol = getIntrinsicTagSymbol(node);
+                    if (links.jsxFlags & 1) {
+                        return links.resolvedJsxType = getTypeOfSymbol(symbol);
+                    }
+                    else if (links.jsxFlags & 2) {
+                        return links.resolvedJsxType = getIndexInfoOfSymbol(symbol, 0).type;
+                    }
+                    else {
+                        return links.resolvedJsxType = unknownType;
+                    }
+                }
+                else {
+                    var elemClassType = getJsxGlobalElementClassType();
+                    return links.resolvedJsxType = getResolvedJsxType(node, undefined, elemClassType);
+                }
+            }
+            return links.resolvedJsxType;
+        }
+        function getJsxAttributePropertySymbol(attrib) {
+            var attributesType = getJsxElementAttributesType(attrib.parent);
+            var prop = getPropertyOfType(attributesType, attrib.name.text);
+            return prop || unknownSymbol;
+        }
+        function getJsxGlobalElementClassType() {
+            if (!jsxElementClassType) {
+                jsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
+            }
+            return jsxElementClassType;
+        }
+        function getJsxIntrinsicTagNames() {
+            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
+            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
+        }
+        function checkJsxPreconditions(errorNode) {
+            if ((compilerOptions.jsx || 0) === 0) {
+                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
+            }
+            if (jsxElementType === undefined) {
+                if (compilerOptions.noImplicitAny) {
+                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
+                }
+            }
+        }
+        function checkJsxOpeningLikeElement(node) {
+            checkGrammarJsxElement(node);
+            checkJsxPreconditions(node);
+            var reactRefErr = compilerOptions.jsx === 2 ? ts.Diagnostics.Cannot_find_name_0 : undefined;
+            var reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
+            var reactSym = resolveName(node.tagName, reactNamespace, 107455, reactRefErr, reactNamespace);
+            if (reactSym) {
+                getSymbolLinks(reactSym).referenced = true;
+            }
+            var targetAttributesType = getJsxElementAttributesType(node);
+            var nameTable = {};
+            var sawSpreadedAny = false;
+            for (var i = node.attributes.length - 1; i >= 0; i--) {
+                if (node.attributes[i].kind === 246) {
+                    checkJsxAttribute((node.attributes[i]), targetAttributesType, nameTable);
+                }
+                else {
+                    ts.Debug.assert(node.attributes[i].kind === 247);
+                    var spreadType = checkJsxSpreadAttribute((node.attributes[i]), targetAttributesType, nameTable);
+                    if (isTypeAny(spreadType)) {
+                        sawSpreadedAny = true;
+                    }
+                }
+            }
+            if (targetAttributesType && !sawSpreadedAny) {
+                var targetProperties = getPropertiesOfType(targetAttributesType);
+                for (var i = 0; i < targetProperties.length; i++) {
+                    if (!(targetProperties[i].flags & 536870912) &&
+                        nameTable[targetProperties[i].name] === undefined) {
+                        error(node, ts.Diagnostics.Property_0_is_missing_in_type_1, targetProperties[i].name, typeToString(targetAttributesType));
+                    }
+                }
+            }
+        }
+        function checkJsxExpression(node) {
+            if (node.expression) {
+                return checkExpression(node.expression);
+            }
+            else {
+                return unknownType;
+            }
+        }
+        function getDeclarationKindFromSymbol(s) {
+            return s.valueDeclaration ? s.valueDeclaration.kind : 145;
+        }
+        function getDeclarationFlagsFromSymbol(s) {
+            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : s.flags & 134217728 ? 4 | 32 : 0;
+        }
+        function checkClassPropertyAccess(node, left, type, prop) {
+            var flags = getDeclarationFlagsFromSymbol(prop);
+            var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop));
+            var errorNode = node.kind === 172 || node.kind === 218 ?
+                node.name :
+                node.right;
+            if (left.kind === 95) {
+                if (languageVersion < 2 && getDeclarationKindFromSymbol(prop) !== 147) {
+                    error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
+                    return false;
+                }
+                if (flags & 128) {
+                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass));
+                    return false;
+                }
+            }
+            if (!(flags & (8 | 16))) {
+                return true;
+            }
+            if (flags & 8) {
+                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
+                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass));
+                    return false;
+                }
+                return true;
+            }
+            if (left.kind === 95) {
+                return true;
+            }
+            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
+                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
+                return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined;
+            });
+            if (!enclosingClass) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass));
+                return false;
+            }
+            if (flags & 32) {
+                return true;
+            }
+            if (type.flags & 33554432) {
+                type = getConstraintOfTypeParameter(type);
+            }
+            if (!(getTargetType(type).flags & (1024 | 2048) && hasBaseType(type, enclosingClass))) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
+                return false;
+            }
+            return true;
+        }
+        function checkNonNullExpression(node) {
+            var type = checkExpression(node);
+            if (strictNullChecks) {
+                var kind = getCombinedTypeFlags(type) & 96;
+                if (kind) {
+                    error(node, kind & 32 ? kind & 64 ?
+                        ts.Diagnostics.Object_is_possibly_null_or_undefined :
+                        ts.Diagnostics.Object_is_possibly_undefined :
+                        ts.Diagnostics.Object_is_possibly_null);
+                }
+                return getNonNullableType(type);
+            }
+            return type;
+        }
+        function checkPropertyAccessExpression(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
+        }
+        function checkQualifiedName(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
+        }
+        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
+            var type = checkNonNullExpression(left);
+            if (isTypeAny(type)) {
+                return type;
+            }
+            var apparentType = getApparentType(getWidenedType(type));
+            if (apparentType === unknownType || (type.flags & 512 && isTypeAny(apparentType))) {
+                return apparentType;
+            }
+            var prop = getPropertyOfType(apparentType, right.text);
+            if (!prop) {
+                if (right.text) {
+                    error(right, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(right), typeToString(type.flags & 33554432 ? apparentType : type));
+                }
+                return unknownType;
+            }
+            getNodeLinks(node).resolvedSymbol = prop;
+            if (prop.parent && prop.parent.flags & 32) {
+                checkClassPropertyAccess(node, left, apparentType, prop);
+            }
+            var propType = getTypeOfSymbol(prop);
+            if (node.kind !== 172 || ts.isAssignmentTarget(node) ||
+                !(prop.flags & (3 | 4 | 98304)) &&
+                    !(prop.flags & 8192 && propType.flags & 16384)) {
+                return propType;
+            }
+            return getFlowTypeOfReference(node, propType, true, false);
+        }
+        function isValidPropertyAccess(node, propertyName) {
+            var left = node.kind === 172
+                ? node.expression
+                : node.left;
+            var type = checkExpression(left);
+            if (type !== unknownType && !isTypeAny(type)) {
+                var prop = getPropertyOfType(getWidenedType(type), propertyName);
+                if (prop && prop.parent && prop.parent.flags & 32) {
+                    return checkClassPropertyAccess(node, left, type, prop);
+                }
+            }
+            return true;
+        }
+        function getForInVariableSymbol(node) {
+            var initializer = node.initializer;
+            if (initializer.kind === 219) {
+                var variable = initializer.declarations[0];
+                if (variable && !ts.isBindingPattern(variable.name)) {
+                    return getSymbolOfNode(variable);
+                }
+            }
+            else if (initializer.kind === 69) {
+                return getResolvedSymbol(initializer);
+            }
+            return undefined;
+        }
+        function hasNumericPropertyNames(type) {
+            return getIndexTypeOfType(type, 1) && !getIndexTypeOfType(type, 0);
+        }
+        function isForInVariableForNumericPropertyNames(expr) {
+            var e = skipParenthesizedNodes(expr);
+            if (e.kind === 69) {
+                var symbol = getResolvedSymbol(e);
+                if (symbol.flags & 3) {
+                    var child = expr;
+                    var node = expr.parent;
+                    while (node) {
+                        if (node.kind === 207 &&
+                            child === node.statement &&
+                            getForInVariableSymbol(node) === symbol &&
+                            hasNumericPropertyNames(checkExpression(node.expression))) {
+                            return true;
+                        }
+                        child = node;
+                        node = node.parent;
+                    }
+                }
+            }
+            return false;
+        }
+        function checkIndexedAccess(node) {
+            if (!node.argumentExpression) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                if (node.parent.kind === 175 && node.parent.expression === node) {
+                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
+                }
+                else {
+                    var start = node.end - "]".length;
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
+                }
+            }
+            var objectType = getApparentType(checkNonNullExpression(node.expression));
+            var indexType = node.argumentExpression ? checkExpression(node.argumentExpression) : unknownType;
+            if (objectType === unknownType) {
+                return unknownType;
+            }
+            var isConstEnum = isConstEnumObjectType(objectType);
+            if (isConstEnum &&
+                (!node.argumentExpression || node.argumentExpression.kind !== 9)) {
+                error(node.argumentExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
+                return unknownType;
+            }
+            if (node.argumentExpression) {
+                var name_13 = getPropertyNameForIndexedAccess(node.argumentExpression, indexType);
+                if (name_13 !== undefined) {
+                    var prop = getPropertyOfType(objectType, name_13);
+                    if (prop) {
+                        getNodeLinks(node).resolvedSymbol = prop;
+                        return getTypeOfSymbol(prop);
+                    }
+                    else if (isConstEnum) {
+                        error(node.argumentExpression, ts.Diagnostics.Property_0_does_not_exist_on_const_enum_1, name_13, symbolToString(objectType.symbol));
+                        return unknownType;
+                    }
+                }
+            }
+            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 258 | 132 | 16777216)) {
+                if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 132) || isForInVariableForNumericPropertyNames(node.argumentExpression)) {
+                    var numberIndexInfo = getIndexInfoOfType(objectType, 1);
+                    if (numberIndexInfo) {
+                        getNodeLinks(node).resolvedIndexInfo = numberIndexInfo;
+                        return numberIndexInfo.type;
+                    }
+                }
+                var stringIndexInfo = getIndexInfoOfType(objectType, 0);
+                if (stringIndexInfo) {
+                    getNodeLinks(node).resolvedIndexInfo = stringIndexInfo;
+                    return stringIndexInfo.type;
+                }
+                if (compilerOptions.noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors && !isTypeAny(objectType)) {
+                    error(node, getIndexTypeOfType(objectType, 1) ?
+                        ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number :
+                        ts.Diagnostics.Index_signature_of_object_type_implicitly_has_an_any_type);
+                }
+                return anyType;
+            }
+            error(node, ts.Diagnostics.An_index_expression_argument_must_be_of_type_string_number_symbol_or_any);
+            return unknownType;
+        }
+        function getPropertyNameForIndexedAccess(indexArgumentExpression, indexArgumentType) {
+            if (indexArgumentExpression.kind === 9 || indexArgumentExpression.kind === 8) {
+                return indexArgumentExpression.text;
+            }
+            if (indexArgumentExpression.kind === 173 || indexArgumentExpression.kind === 172) {
+                var value = getConstantValue(indexArgumentExpression);
+                if (value !== undefined) {
+                    return value.toString();
+                }
+            }
+            if (checkThatExpressionIsProperSymbolReference(indexArgumentExpression, indexArgumentType, false)) {
+                var rightHandSideName = indexArgumentExpression.name.text;
+                return ts.getPropertyNameForKnownSymbolName(rightHandSideName);
+            }
+            return undefined;
+        }
+        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
+            if (expressionType === unknownType) {
+                return false;
+            }
+            if (!ts.isWellKnownSymbolSyntactically(expression)) {
+                return false;
+            }
+            if ((expressionType.flags & 16777216) === 0) {
+                if (reportError) {
+                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
+                }
+                return false;
+            }
+            var leftHandSide = expression.expression;
+            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
+            if (!leftHandSideSymbol) {
+                return false;
+            }
+            var globalESSymbol = getGlobalESSymbolConstructorSymbol();
+            if (!globalESSymbol) {
+                return false;
+            }
+            if (leftHandSideSymbol !== globalESSymbol) {
+                if (reportError) {
+                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
+                }
+                return false;
+            }
+            return true;
+        }
+        function resolveUntypedCall(node) {
+            if (node.kind === 176) {
+                checkExpression(node.template);
+            }
+            else if (node.kind !== 143) {
+                ts.forEach(node.arguments, function (argument) {
+                    checkExpression(argument);
+                });
+            }
+            return anySignature;
+        }
+        function resolveErrorCall(node) {
+            resolveUntypedCall(node);
+            return unknownSignature;
+        }
+        function reorderCandidates(signatures, result) {
+            var lastParent;
+            var lastSymbol;
+            var cutoffIndex = 0;
+            var index;
+            var specializedIndex = -1;
+            var spliceIndex;
+            ts.Debug.assert(!result.length);
+            for (var _i = 0, signatures_2 = signatures; _i < signatures_2.length; _i++) {
+                var signature = signatures_2[_i];
+                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
+                var parent_9 = signature.declaration && signature.declaration.parent;
+                if (!lastSymbol || symbol === lastSymbol) {
+                    if (lastParent && parent_9 === lastParent) {
+                        index++;
+                    }
+                    else {
+                        lastParent = parent_9;
+                        index = cutoffIndex;
+                    }
+                }
+                else {
+                    index = cutoffIndex = result.length;
+                    lastParent = parent_9;
+                }
+                lastSymbol = symbol;
+                if (signature.hasStringLiterals) {
+                    specializedIndex++;
+                    spliceIndex = specializedIndex;
+                    cutoffIndex++;
+                }
+                else {
+                    spliceIndex = index;
+                }
+                result.splice(spliceIndex, 0, signature);
+            }
+        }
+        function getSpreadArgumentIndex(args) {
+            for (var i = 0; i < args.length; i++) {
+                var arg = args[i];
+                if (arg && arg.kind === 191) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+        function hasCorrectArity(node, args, signature, signatureHelpTrailingComma) {
+            if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+            var argCount;
+            var typeArguments;
+            var callIsIncomplete;
+            var isDecorator;
+            var spreadArgIndex = -1;
+            if (node.kind === 176) {
+                var tagExpression = node;
+                argCount = args.length;
+                typeArguments = undefined;
+                if (tagExpression.template.kind === 189) {
+                    var templateExpression = tagExpression.template;
+                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
+                    ts.Debug.assert(lastSpan !== undefined);
+                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
+                }
+                else {
+                    var templateLiteral = tagExpression.template;
+                    ts.Debug.assert(templateLiteral.kind === 11);
+                    callIsIncomplete = !!templateLiteral.isUnterminated;
+                }
+            }
+            else if (node.kind === 143) {
+                isDecorator = true;
+                typeArguments = undefined;
+                argCount = getEffectiveArgumentCount(node, undefined, signature);
+            }
+            else {
+                var callExpression = node;
+                if (!callExpression.arguments) {
+                    ts.Debug.assert(callExpression.kind === 175);
+                    return signature.minArgumentCount === 0;
+                }
+                argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
+                callIsIncomplete = callExpression.arguments.end === callExpression.end;
+                typeArguments = callExpression.typeArguments;
+                spreadArgIndex = getSpreadArgumentIndex(args);
+            }
+            var hasRightNumberOfTypeArgs = !typeArguments ||
+                (signature.typeParameters && typeArguments.length === signature.typeParameters.length);
+            if (!hasRightNumberOfTypeArgs) {
+                return false;
+            }
+            if (spreadArgIndex >= 0) {
+                return isRestParameterIndex(signature, spreadArgIndex);
+            }
+            if (!signature.hasRestParameter && argCount > signature.parameters.length) {
+                return false;
+            }
+            var hasEnoughArguments = argCount >= signature.minArgumentCount;
+            return callIsIncomplete || hasEnoughArguments;
+        }
+        function getSingleCallSignature(type) {
+            if (type.flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
+                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                    return resolved.callSignatures[0];
+                }
+            }
+            return undefined;
+        }
+        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
+            var context = createInferenceContext(signature.typeParameters, true);
+            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
+                inferTypes(context, instantiateType(source, contextualMapper), target);
+            });
+            return getSignatureInstantiation(signature, getInferredTypes(context));
+        }
+        function inferTypeArguments(node, signature, args, excludeArgument, context) {
+            var typeParameters = signature.typeParameters;
+            var inferenceMapper = getInferenceMapper(context);
+            for (var i = 0; i < typeParameters.length; i++) {
+                if (!context.inferences[i].isFixed) {
+                    context.inferredTypes[i] = undefined;
+                }
+            }
+            if (context.failedTypeParameterIndex !== undefined && !context.inferences[context.failedTypeParameterIndex].isFixed) {
+                context.failedTypeParameterIndex = undefined;
+            }
+            if (signature.thisType) {
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                inferTypes(context, thisArgumentType, signature.thisType);
+            }
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                if (arg === undefined || arg.kind !== 193) {
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i, arg);
+                    if (argType === undefined) {
+                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : inferenceMapper;
+                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
+                    }
+                    inferTypes(context, argType, paramType);
+                }
+            }
+            if (excludeArgument) {
+                for (var i = 0; i < argCount; i++) {
+                    if (excludeArgument[i] === false) {
+                        var arg = args[i];
+                        var paramType = getTypeAtPosition(signature, i);
+                        inferTypes(context, checkExpressionWithContextualType(arg, paramType, inferenceMapper), paramType);
+                    }
+                }
+            }
+            getInferredTypes(context);
+        }
+        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
+            var typeParameters = signature.typeParameters;
+            var typeArgumentsAreAssignable = true;
+            var mapper;
+            for (var i = 0; i < typeParameters.length; i++) {
+                if (typeArgumentsAreAssignable) {
+                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                    if (constraint) {
+                        var errorInfo = void 0;
+                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
+                        if (reportErrors && headMessage) {
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
+                            typeArgumentHeadMessage = headMessage;
+                        }
+                        if (!mapper) {
+                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
+                        }
+                        var typeArgument = typeArgumentTypes[i];
+                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
+                    }
+                }
+            }
+            return typeArgumentsAreAssignable;
+        }
+        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
+            if (signature.thisType && signature.thisType !== voidType && node.kind !== 175) {
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
+                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
+                if (!checkTypeRelatedTo(thisArgumentType, signature.thisType, relation, errorNode, headMessage_1)) {
+                    return false;
+                }
+            }
+            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                if (arg === undefined || arg.kind !== 193) {
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i, arg);
+                    if (argType === undefined) {
+                        argType = arg.kind === 9 && !reportErrors
+                            ? getStringLiteralTypeForText(arg.text)
+                            : checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
+                    }
+                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
+                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function getThisArgumentOfCall(node) {
+            if (node.kind === 174) {
+                var callee = node.expression;
+                if (callee.kind === 172) {
+                    return callee.expression;
+                }
+                else if (callee.kind === 173) {
+                    return callee.expression;
+                }
+            }
+        }
+        function getEffectiveCallArguments(node) {
+            var args;
+            if (node.kind === 176) {
+                var template = node.template;
+                args = [undefined];
+                if (template.kind === 189) {
+                    ts.forEach(template.templateSpans, function (span) {
+                        args.push(span.expression);
+                    });
+                }
+            }
+            else if (node.kind === 143) {
+                return undefined;
+            }
+            else {
+                args = node.arguments || emptyArray;
+            }
+            return args;
+        }
+        function getEffectiveArgumentCount(node, args, signature) {
+            if (node.kind === 143) {
+                switch (node.parent.kind) {
+                    case 221:
+                    case 192:
+                        return 1;
+                    case 145:
+                        return 2;
+                    case 147:
+                    case 149:
+                    case 150:
+                        if (languageVersion === 0) {
+                            return 2;
+                        }
+                        return signature.parameters.length >= 3 ? 3 : 2;
+                    case 142:
+                        return 3;
+                }
+            }
+            else {
+                return args.length;
+            }
+        }
+        function getEffectiveDecoratorFirstArgumentType(node) {
+            if (node.kind === 221) {
+                var classSymbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(classSymbol);
+            }
+            if (node.kind === 142) {
+                node = node.parent;
+                if (node.kind === 148) {
+                    var classSymbol = getSymbolOfNode(node);
+                    return getTypeOfSymbol(classSymbol);
+                }
+            }
+            if (node.kind === 145 ||
+                node.kind === 147 ||
+                node.kind === 149 ||
+                node.kind === 150) {
+                return getParentTypeOfClassElement(node);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        function getEffectiveDecoratorSecondArgumentType(node) {
+            if (node.kind === 221) {
+                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 142) {
+                node = node.parent;
+                if (node.kind === 148) {
+                    return anyType;
+                }
+            }
+            if (node.kind === 145 ||
+                node.kind === 147 ||
+                node.kind === 149 ||
+                node.kind === 150) {
+                var element = node;
+                switch (element.name.kind) {
+                    case 69:
+                    case 8:
+                    case 9:
+                        return getStringLiteralTypeForText(element.name.text);
+                    case 140:
+                        var nameType = checkComputedPropertyName(element.name);
+                        if (isTypeOfKind(nameType, 16777216)) {
+                            return nameType;
+                        }
+                        else {
+                            return stringType;
+                        }
+                    default:
+                        ts.Debug.fail("Unsupported property name.");
+                        return unknownType;
+                }
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        function getEffectiveDecoratorThirdArgumentType(node) {
+            if (node.kind === 221) {
+                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 142) {
+                return numberType;
+            }
+            if (node.kind === 145) {
+                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 147 ||
+                node.kind === 149 ||
+                node.kind === 150) {
+                var propertyType = getTypeOfNode(node);
+                return createTypedPropertyDescriptorType(propertyType);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        function getEffectiveDecoratorArgumentType(node, argIndex) {
+            if (argIndex === 0) {
+                return getEffectiveDecoratorFirstArgumentType(node.parent);
+            }
+            else if (argIndex === 1) {
+                return getEffectiveDecoratorSecondArgumentType(node.parent);
+            }
+            else if (argIndex === 2) {
+                return getEffectiveDecoratorThirdArgumentType(node.parent);
+            }
+            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
+            return unknownType;
+        }
+        function getEffectiveArgumentType(node, argIndex, arg) {
+            if (node.kind === 143) {
+                return getEffectiveDecoratorArgumentType(node, argIndex);
+            }
+            else if (argIndex === 0 && node.kind === 176) {
+                return getGlobalTemplateStringsArrayType();
+            }
+            return undefined;
+        }
+        function getEffectiveArgument(node, args, argIndex) {
+            if (node.kind === 143 ||
+                (argIndex === 0 && node.kind === 176)) {
+                return undefined;
+            }
+            return args[argIndex];
+        }
+        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
+            if (node.kind === 143) {
+                return node.expression;
+            }
+            else if (argIndex === 0 && node.kind === 176) {
+                return node.template;
+            }
+            else {
+                return arg;
+            }
+        }
+        function resolveCall(node, signatures, candidatesOutArray, headMessage) {
+            var isTaggedTemplate = node.kind === 176;
+            var isDecorator = node.kind === 143;
+            var typeArguments;
+            if (!isTaggedTemplate && !isDecorator) {
+                typeArguments = node.typeArguments;
+                if (node.expression.kind !== 95) {
+                    ts.forEach(typeArguments, checkSourceElement);
+                }
+            }
+            var candidates = candidatesOutArray || [];
+            reorderCandidates(signatures, candidates);
+            if (!candidates.length) {
+                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+                return resolveErrorCall(node);
+            }
+            var args = getEffectiveCallArguments(node);
+            var excludeArgument;
+            if (!isDecorator) {
+                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
+                    if (isContextSensitive(args[i])) {
+                        if (!excludeArgument) {
+                            excludeArgument = new Array(args.length);
+                        }
+                        excludeArgument[i] = true;
+                    }
+                }
+            }
+            var candidateForArgumentError;
+            var candidateForTypeArgumentError;
+            var resultOfFailedInference;
+            var result;
+            var signatureHelpTrailingComma = candidatesOutArray && node.kind === 174 && node.arguments.hasTrailingComma;
+            if (candidates.length > 1) {
+                result = chooseOverload(candidates, subtypeRelation, signatureHelpTrailingComma);
+            }
+            if (!result) {
+                candidateForArgumentError = undefined;
+                candidateForTypeArgumentError = undefined;
+                resultOfFailedInference = undefined;
+                result = chooseOverload(candidates, assignableRelation, signatureHelpTrailingComma);
+            }
+            if (result) {
+                return result;
+            }
+            if (candidateForArgumentError) {
+                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, undefined, true);
+            }
+            else if (candidateForTypeArgumentError) {
+                if (!isTaggedTemplate && !isDecorator && typeArguments) {
+                    var typeArguments_2 = node.typeArguments;
+                    checkTypeArguments(candidateForTypeArgumentError, typeArguments_2, ts.map(typeArguments_2, getTypeFromTypeNode), true, headMessage);
+                }
+                else {
+                    ts.Debug.assert(resultOfFailedInference.failedTypeParameterIndex >= 0);
+                    var failedTypeParameter = candidateForTypeArgumentError.typeParameters[resultOfFailedInference.failedTypeParameterIndex];
+                    var inferenceCandidates = getInferenceCandidates(resultOfFailedInference, resultOfFailedInference.failedTypeParameterIndex);
+                    var diagnosticChainHead = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly, typeToString(failedTypeParameter));
+                    if (headMessage) {
+                        diagnosticChainHead = ts.chainDiagnosticMessages(diagnosticChainHead, headMessage);
+                    }
+                    reportNoCommonSupertypeError(inferenceCandidates, node.expression || node.tag, diagnosticChainHead);
+                }
+            }
+            else {
+                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+            }
+            if (!produceDiagnostics) {
+                for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
+                    var candidate = candidates_1[_i];
+                    if (hasCorrectArity(node, args, candidate)) {
+                        if (candidate.typeParameters && typeArguments) {
+                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNode));
+                        }
+                        return candidate;
+                    }
+                }
+            }
+            return resolveErrorCall(node);
+            function reportError(message, arg0, arg1, arg2) {
+                var errorInfo;
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+                if (headMessage) {
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
+                }
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+            }
+            function chooseOverload(candidates, relation, signatureHelpTrailingComma) {
+                if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
+                    var originalCandidate = candidates_2[_i];
+                    if (!hasCorrectArity(node, args, originalCandidate, signatureHelpTrailingComma)) {
+                        continue;
+                    }
+                    var candidate = void 0;
+                    var typeArgumentsAreValid = void 0;
+                    var inferenceContext = originalCandidate.typeParameters
+                        ? createInferenceContext(originalCandidate.typeParameters, false)
+                        : undefined;
+                    while (true) {
+                        candidate = originalCandidate;
+                        if (candidate.typeParameters) {
+                            var typeArgumentTypes = void 0;
+                            if (typeArguments) {
+                                typeArgumentTypes = ts.map(typeArguments, getTypeFromTypeNode);
+                                typeArgumentsAreValid = checkTypeArguments(candidate, typeArguments, typeArgumentTypes, false);
+                            }
+                            else {
+                                inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
+                                typeArgumentsAreValid = inferenceContext.failedTypeParameterIndex === undefined;
+                                typeArgumentTypes = inferenceContext.inferredTypes;
+                            }
+                            if (!typeArgumentsAreValid) {
+                                break;
+                            }
+                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
+                        }
+                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, false)) {
+                            break;
+                        }
+                        var index = excludeArgument ? ts.indexOf(excludeArgument, true) : -1;
+                        if (index < 0) {
+                            return candidate;
+                        }
+                        excludeArgument[index] = false;
+                    }
+                    if (originalCandidate.typeParameters) {
+                        var instantiatedCandidate = candidate;
+                        if (typeArgumentsAreValid) {
+                            candidateForArgumentError = instantiatedCandidate;
+                        }
+                        else {
+                            candidateForTypeArgumentError = originalCandidate;
+                            if (!typeArguments) {
+                                resultOfFailedInference = inferenceContext;
+                            }
+                        }
+                    }
+                    else {
+                        ts.Debug.assert(originalCandidate === candidate);
+                        candidateForArgumentError = originalCandidate;
+                    }
+                }
+                return undefined;
+            }
+        }
+        function resolveCallExpression(node, candidatesOutArray) {
+            if (node.expression.kind === 95) {
+                var superType = checkSuperExpression(node.expression);
+                if (superType !== unknownType) {
+                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
+                    if (baseTypeNode) {
+                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments);
+                        return resolveCall(node, baseConstructors, candidatesOutArray);
+                    }
+                }
+                return resolveUntypedCall(node);
+            }
+            var funcType = checkNonNullExpression(node.expression);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0);
+            var constructSignatures = getSignaturesOfType(apparentType, 1);
+            if (isTypeAny(funcType) ||
+                (isTypeAny(apparentType) && funcType.flags & 512) ||
+                (!callSignatures.length && !constructSignatures.length && !(funcType.flags & 16384) && isTypeAssignableTo(funcType, globalFunctionType))) {
+                if (funcType !== unknownType && node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+                }
+                return resolveUntypedCall(node);
+            }
+            if (!callSignatures.length) {
+                if (constructSignatures.length) {
+                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
+                }
+                else {
+                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                }
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray);
+        }
+        function resolveNewExpression(node, candidatesOutArray) {
+            if (node.arguments && languageVersion < 1) {
+                var spreadIndex = getSpreadArgumentIndex(node.arguments);
+                if (spreadIndex >= 0) {
+                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
+                }
+            }
+            var expressionType = checkNonNullExpression(node.expression);
+            expressionType = getApparentType(expressionType);
+            if (expressionType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
+            if (valueDecl && valueDecl.flags & 128) {
+                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
+                return resolveErrorCall(node);
+            }
+            if (isTypeAny(expressionType)) {
+                if (node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+                }
+                return resolveUntypedCall(node);
+            }
+            var constructSignatures = getSignaturesOfType(expressionType, 1);
+            if (constructSignatures.length) {
+                if (!isConstructorAccessible(node, constructSignatures[0])) {
+                    return resolveErrorCall(node);
+                }
+                return resolveCall(node, constructSignatures, candidatesOutArray);
+            }
+            var callSignatures = getSignaturesOfType(expressionType, 0);
+            if (callSignatures.length) {
+                var signature = resolveCall(node, callSignatures, candidatesOutArray);
+                if (getReturnTypeOfSignature(signature) !== voidType) {
+                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
+                }
+                if (signature.thisType === voidType) {
+                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
+                }
+                return signature;
+            }
+            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
+            return resolveErrorCall(node);
+        }
+        function isConstructorAccessible(node, signature) {
+            if (!signature || !signature.declaration) {
+                return true;
+            }
+            var declaration = signature.declaration;
+            var flags = declaration.flags;
+            if (!(flags & (8 | 16))) {
+                return true;
+            }
+            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
+            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
+            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                if (flags & 8) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                if (flags & 16) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                return false;
+            }
+            return true;
+        }
+        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
+            var tagType = checkExpression(node.tag);
+            var apparentType = getApparentType(tagType);
+            if (apparentType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0);
+            if (isTypeAny(tagType) || (!callSignatures.length && !(tagType.flags & 16384) && isTypeAssignableTo(tagType, globalFunctionType))) {
+                return resolveUntypedCall(node);
+            }
+            if (!callSignatures.length) {
+                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray);
+        }
+        function getDiagnosticHeadMessageForDecoratorResolution(node) {
+            switch (node.parent.kind) {
+                case 221:
+                case 192:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
+                case 142:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
+                case 145:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
+                case 147:
+                case 149:
+                case 150:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
+            }
+        }
+        function resolveDecorator(node, candidatesOutArray) {
+            var funcType = checkExpression(node.expression);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0);
+            if (funcType === anyType || (!callSignatures.length && !(funcType.flags & 16384) && isTypeAssignableTo(funcType, globalFunctionType))) {
+                return resolveUntypedCall(node);
+            }
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            if (!callSignatures.length) {
+                var errorInfo = void 0;
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
+        }
+        function resolveSignature(node, candidatesOutArray) {
+            switch (node.kind) {
+                case 174:
+                    return resolveCallExpression(node, candidatesOutArray);
+                case 175:
+                    return resolveNewExpression(node, candidatesOutArray);
+                case 176:
+                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
+                case 143:
+                    return resolveDecorator(node, candidatesOutArray);
+            }
+            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
+        }
+        function getResolvedSignature(node, candidatesOutArray) {
+            var links = getNodeLinks(node);
+            var cached = links.resolvedSignature;
+            if (cached && cached !== anySignature && !candidatesOutArray) {
+                return cached;
+            }
+            links.resolvedSignature = anySignature;
+            var result = resolveSignature(node, candidatesOutArray);
+            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
+            return result;
+        }
+        function getResolvedOrAnySignature(node) {
+            return getNodeLinks(node).resolvedSignature === anySignature ? anySignature : getResolvedSignature(node);
+        }
+        function getInferredClassType(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.inferredClassType) {
+                links.inferredClassType = createAnonymousType(undefined, symbol.members, emptyArray, emptyArray, undefined, undefined);
+            }
+            return links.inferredClassType;
+        }
+        function checkCallExpression(node) {
+            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
+            var signature = getResolvedSignature(node);
+            if (node.expression.kind === 95) {
+                return voidType;
+            }
+            if (node.kind === 175) {
+                var declaration = signature.declaration;
+                if (declaration &&
+                    declaration.kind !== 148 &&
+                    declaration.kind !== 152 &&
+                    declaration.kind !== 157 &&
+                    !ts.isJSDocConstructSignature(declaration)) {
+                    var funcSymbol = checkExpression(node.expression).symbol;
+                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16)) {
+                        return getInferredClassType(funcSymbol);
+                    }
+                    else if (compilerOptions.noImplicitAny) {
+                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
+                    }
+                    return anyType;
+                }
+            }
+            if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, true)) {
+                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
+            }
+            return getReturnTypeOfSignature(signature);
+        }
+        function checkTaggedTemplateExpression(node) {
+            return getReturnTypeOfSignature(getResolvedSignature(node));
+        }
+        function checkAssertion(node) {
+            var exprType = getRegularTypeOfObjectLiteral(checkExpression(node.expression));
+            var targetType = getTypeFromTypeNode(node.type);
+            if (produceDiagnostics && targetType !== unknownType) {
+                var widenedType = getWidenedType(exprType);
+                if (!isTypeComparableTo(targetType, widenedType)) {
+                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
+                }
+            }
+            return targetType;
+        }
+        function checkNonNullAssertion(node) {
+            return getNonNullableType(checkExpression(node.expression));
+        }
+        function getTypeOfParameter(symbol) {
+            var type = getTypeOfSymbol(symbol);
+            if (strictNullChecks) {
+                var declaration = symbol.valueDeclaration;
+                if (declaration && declaration.initializer) {
+                    return addTypeKind(type, 32);
+                }
+            }
+            return type;
+        }
+        function getTypeAtPosition(signature, pos) {
+            return signature.hasRestParameter ?
+                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
+                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
+        }
+        function assignContextualParameterTypes(signature, context, mapper) {
+            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            for (var i = 0; i < len; i++) {
+                var parameter = signature.parameters[i];
+                var contextualParameterType = getTypeAtPosition(context, i);
+                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            }
+            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
+                var parameter = ts.lastOrUndefined(signature.parameters);
+                var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
+                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            }
+        }
+        function assignBindingElementTypes(node) {
+            if (ts.isBindingPattern(node.name)) {
+                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (element.kind !== 193) {
+                        if (element.name.kind === 69) {
+                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
+                        }
+                        assignBindingElementTypes(element);
+                    }
+                }
+            }
+        }
+        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType, mapper) {
+            var links = getSymbolLinks(parameter);
+            if (!links.type) {
+                links.type = instantiateType(contextualType, mapper);
+                if (links.type === emptyObjectType &&
+                    (parameter.valueDeclaration.name.kind === 167 ||
+                        parameter.valueDeclaration.name.kind === 168)) {
+                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
+                }
+                assignBindingElementTypes(parameter.valueDeclaration);
+            }
+            else if (isInferentialContext(mapper)) {
+                inferTypes(mapper.context, links.type, instantiateType(contextualType, mapper));
+            }
+        }
+        function getReturnTypeFromJSDocComment(func) {
+            var returnTag = ts.getJSDocReturnTag(func);
+            if (returnTag && returnTag.typeExpression) {
+                return getTypeFromTypeNode(returnTag.typeExpression.type);
+            }
+            return undefined;
+        }
+        function createPromiseType(promisedType) {
+            var globalPromiseType = getGlobalPromiseType();
+            if (globalPromiseType !== emptyGenericType) {
+                promisedType = getAwaitedType(promisedType);
+                return createTypeReference(globalPromiseType, [promisedType]);
+            }
+            return emptyObjectType;
+        }
+        function getReturnTypeFromBody(func, contextualMapper) {
+            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
+            if (!func.body) {
+                return unknownType;
+            }
+            var isAsync = ts.isAsyncFunctionLike(func);
+            var type;
+            if (func.body.kind !== 199) {
+                type = checkExpressionCached(func.body, contextualMapper);
+                if (isAsync) {
+                    type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                }
+            }
+            else {
+                var types = void 0;
+                var funcIsGenerator = !!func.asteriskToken;
+                if (funcIsGenerator) {
+                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
+                    if (types.length === 0) {
+                        var iterableIteratorAny = createIterableIteratorType(anyType);
+                        if (compilerOptions.noImplicitAny) {
+                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
+                        }
+                        return iterableIteratorAny;
+                    }
+                }
+                else {
+                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
+                    if (!types) {
+                        return neverType;
+                    }
+                    if (types.length === 0) {
+                        if (isAsync) {
+                            var promiseType = createPromiseType(voidType);
+                            if (promiseType === emptyObjectType) {
+                                error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+                                return unknownType;
+                            }
+                            return promiseType;
+                        }
+                        return voidType;
+                    }
+                }
+                type = contextualSignature ? getUnionType(types) : getCommonSupertype(types);
+                if (!type) {
+                    if (funcIsGenerator) {
+                        error(func, ts.Diagnostics.No_best_common_type_exists_among_yield_expressions);
+                        return createIterableIteratorType(unknownType);
+                    }
+                    else {
+                        error(func, ts.Diagnostics.No_best_common_type_exists_among_return_expressions);
+                        return getUnionType(types);
+                    }
+                }
+                if (funcIsGenerator) {
+                    type = createIterableIteratorType(type);
+                }
+            }
+            if (!contextualSignature) {
+                reportErrorsFromWidening(func, type);
+            }
+            var widenedType = getWidenedType(type);
+            if (isAsync) {
+                var promiseType = createPromiseType(widenedType);
+                if (promiseType === emptyObjectType) {
+                    error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+                    return unknownType;
+                }
+                return promiseType;
+            }
+            else {
+                return widenedType;
+            }
+        }
+        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
+            var aggregatedTypes = [];
+            ts.forEachYieldExpression(func.body, function (yieldExpression) {
+                var expr = yieldExpression.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, contextualMapper);
+                    if (yieldExpression.asteriskToken) {
+                        type = checkElementTypeOfIterable(type, yieldExpression.expression);
+                    }
+                    if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
+                    }
+                }
+            });
+            return aggregatedTypes;
+        }
+        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
+            var isAsync = ts.isAsyncFunctionLike(func);
+            var aggregatedTypes = [];
+            var hasReturnWithNoExpression = !!(func.flags & 32768);
+            var hasReturnOfTypeNever = false;
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
+                var expr = returnStatement.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, contextualMapper);
+                    if (isAsync) {
+                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                    }
+                    if (type === neverType) {
+                        hasReturnOfTypeNever = true;
+                    }
+                    else if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
+                    }
+                }
+                else {
+                    hasReturnWithNoExpression = true;
+                }
+            });
+            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
+                func.kind === 179 || func.kind === 180)) {
+                return undefined;
+            }
+            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
+                if (!ts.contains(aggregatedTypes, undefinedType)) {
+                    aggregatedTypes.push(undefinedType);
+                }
+            }
+            return aggregatedTypes;
+        }
+        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            if (returnType && maybeTypeOfKind(returnType, 1 | 16)) {
+                return;
+            }
+            if (ts.nodeIsMissing(func.body) || func.body.kind !== 199 || !(func.flags & 32768)) {
+                return;
+            }
+            var hasExplicitReturn = func.flags & 65536;
+            if (returnType === neverType) {
+                error(func.type, ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
+            }
+            else if (returnType && !hasExplicitReturn) {
+                error(func.type, ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
+            }
+            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
+                error(func.type, ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
+            }
+            else if (compilerOptions.noImplicitReturns) {
+                if (!returnType) {
+                    if (!hasExplicitReturn) {
+                        return;
+                    }
+                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
+                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
+                        return;
+                    }
+                }
+                error(func.type || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
+            }
+        }
+        function checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper) {
+            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
+            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
+            if (!hasGrammarError && node.kind === 179) {
+                checkGrammarForGenerator(node);
+            }
+            if (contextualMapper === identityMapper && isContextSensitive(node)) {
+                checkNodeDeferred(node);
+                return anyFunctionType;
+            }
+            var links = getNodeLinks(node);
+            var type = getTypeOfSymbol(node.symbol);
+            var contextSensitive = isContextSensitive(node);
+            var mightFixTypeParameters = contextSensitive && isInferentialContext(contextualMapper);
+            if (mightFixTypeParameters || !(links.flags & 1024)) {
+                var contextualSignature = getContextualSignature(node);
+                var contextChecked = !!(links.flags & 1024);
+                if (mightFixTypeParameters || !contextChecked) {
+                    links.flags |= 1024;
+                    if (contextualSignature) {
+                        var signature = getSignaturesOfType(type, 0)[0];
+                        if (contextSensitive) {
+                            assignContextualParameterTypes(signature, contextualSignature, contextualMapper || identityMapper);
+                        }
+                        if (mightFixTypeParameters || !node.type && !signature.resolvedReturnType) {
+                            var returnType = getReturnTypeFromBody(node, contextualMapper);
+                            if (!signature.resolvedReturnType) {
+                                signature.resolvedReturnType = returnType;
+                            }
+                        }
+                    }
+                    if (!contextChecked) {
+                        checkSignatureDeclaration(node);
+                        checkNodeDeferred(node);
+                    }
+                }
+            }
+            if (produceDiagnostics && node.kind !== 147 && node.kind !== 146) {
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+            }
+            return type;
+        }
+        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
+            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
+            var isAsync = ts.isAsyncFunctionLike(node);
+            var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
+            if (!node.asteriskToken) {
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (node.body) {
+                if (!node.type) {
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+                }
+                if (node.body.kind === 199) {
+                    checkSourceElement(node.body);
+                }
+                else {
+                    var exprType = checkExpression(node.body);
+                    if (returnOrPromisedType) {
+                        if (isAsync) {
+                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member);
+                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
+                        }
+                    }
+                }
+            }
+        }
+        function checkArithmeticOperandType(operand, type, diagnostic) {
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 132)) {
+                error(operand, diagnostic);
+                return false;
+            }
+            return true;
+        }
+        function isReadonlySymbol(symbol) {
+            return symbol.flags & 4 && (getDeclarationFlagsFromSymbol(symbol) & 64) !== 0 ||
+                symbol.flags & 3 && (getDeclarationFlagsFromSymbol(symbol) & 2048) !== 0 ||
+                symbol.flags & 98304 && !(symbol.flags & 65536) ||
+                (symbol.flags & 8) !== 0;
+        }
+        function isReferenceToReadonlyEntity(expr, symbol) {
+            if (isReadonlySymbol(symbol)) {
+                if (symbol.flags & 4 &&
+                    (expr.kind === 172 || expr.kind === 173) &&
+                    expr.expression.kind === 97) {
+                    var func = ts.getContainingFunction(expr);
+                    if (!(func && func.kind === 148))
+                        return true;
+                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
+                }
+                return true;
+            }
+            return false;
+        }
+        function isReferenceThroughNamespaceImport(expr) {
+            if (expr.kind === 172 || expr.kind === 173) {
+                var node = skipParenthesizedNodes(expr.expression);
+                if (node.kind === 69) {
+                    var symbol = getNodeLinks(node).resolvedSymbol;
+                    if (symbol.flags & 8388608) {
+                        var declaration = getDeclarationOfAliasSymbol(symbol);
+                        return declaration && declaration.kind === 232;
+                    }
+                }
+            }
+            return false;
+        }
+        function checkReferenceExpression(expr, invalidReferenceMessage, constantVariableMessage) {
+            var node = skipParenthesizedNodes(expr);
+            if (node.kind !== 69 && node.kind !== 172 && node.kind !== 173) {
+                error(expr, invalidReferenceMessage);
+                return false;
+            }
+            var links = getNodeLinks(node);
+            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
+            if (symbol) {
+                if (symbol !== unknownSymbol && symbol !== argumentsSymbol) {
+                    if (node.kind === 69 && !(symbol.flags & 3)) {
+                        error(expr, invalidReferenceMessage);
+                        return false;
+                    }
+                    if (isReferenceToReadonlyEntity(node, symbol) || isReferenceThroughNamespaceImport(node)) {
+                        error(expr, constantVariableMessage);
+                        return false;
+                    }
+                }
+            }
+            else if (node.kind === 173) {
+                if (links.resolvedIndexInfo && links.resolvedIndexInfo.isReadonly) {
+                    error(expr, constantVariableMessage);
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkDeleteExpression(node) {
+            checkExpression(node.expression);
+            return booleanType;
+        }
+        function checkTypeOfExpression(node) {
+            checkExpression(node.expression);
+            return stringType;
+        }
+        function checkVoidExpression(node) {
+            checkExpression(node.expression);
+            return undefinedWideningType;
+        }
+        function checkAwaitExpression(node) {
+            if (produceDiagnostics) {
+                if (!(node.flags & 33554432)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
+                }
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
+                }
+            }
+            var operandType = checkExpression(node.expression);
+            return checkAwaitedType(operandType, node);
+        }
+        function checkPrefixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            switch (node.operator) {
+                case 35:
+                case 36:
+                case 50:
+                    if (maybeTypeOfKind(operandType, 16777216)) {
+                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
+                    }
+                    return numberType;
+                case 49:
+                    return booleanType;
+                case 41:
+                case 42:
+                    var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+                    if (ok) {
+                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+                    }
+                    return numberType;
+            }
+            return unknownType;
+        }
+        function checkPostfixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+            if (ok) {
+                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+            }
+            return numberType;
+        }
+        function maybeTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
+            }
+            if (type.flags & 49152) {
+                var types = type.types;
+                for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
+                    var t = types_10[_i];
+                    if (maybeTypeOfKind(t, kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
+            }
+            if (type.flags & 16384) {
+                var types = type.types;
+                for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
+                    var t = types_11[_i];
+                    if (!isTypeOfKind(t, kind)) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            if (type.flags & 32768) {
+                var types = type.types;
+                for (var _a = 0, types_12 = types; _a < types_12.length; _a++) {
+                    var t = types_12[_a];
+                    if (isTypeOfKind(t, kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isConstEnumObjectType(type) {
+            return type.flags & (80896 | 65536) && type.symbol && isConstEnumSymbol(type.symbol);
+        }
+        function isConstEnumSymbol(symbol) {
+            return (symbol.flags & 128) !== 0;
+        }
+        function checkInstanceOfExpression(left, right, leftType, rightType) {
+            if (isTypeOfKind(leftType, 16777726)) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            if (!(isTypeAny(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
+            }
+            return booleanType;
+        }
+        function checkInExpression(left, right, leftType, rightType) {
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 | 132 | 16777216)) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
+            }
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 | 512)) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            return booleanType;
+        }
+        function checkObjectLiteralAssignment(node, sourceType, contextualMapper) {
+            var properties = node.properties;
+            for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
+                var p = properties_3[_i];
+                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, contextualMapper);
+            }
+            return sourceType;
+        }
+        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, contextualMapper) {
+            if (property.kind === 253 || property.kind === 254) {
+                var name_14 = property.name;
+                if (name_14.kind === 140) {
+                    checkComputedPropertyName(name_14);
+                }
+                if (isComputedNonLiteralName(name_14)) {
+                    return undefined;
+                }
+                var text = getTextOfPropertyName(name_14);
+                var type = isTypeAny(objectLiteralType)
+                    ? objectLiteralType
+                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
+                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1) ||
+                        getIndexTypeOfType(objectLiteralType, 0);
+                if (type) {
+                    if (property.kind === 254) {
+                        return checkDestructuringAssignment(property, type);
+                    }
+                    else {
+                        return checkDestructuringAssignment(property.initializer, type);
+                    }
+                }
+                else {
+                    error(name_14, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_14));
+                }
+            }
+            else {
+                error(property, ts.Diagnostics.Property_assignment_expected);
+            }
+        }
+        function checkArrayLiteralAssignment(node, sourceType, contextualMapper) {
+            var elementType = checkIteratedTypeOrElementType(sourceType, node, false) || unknownType;
+            var elements = node.elements;
+            for (var i = 0; i < elements.length; i++) {
+                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, contextualMapper);
+            }
+            return sourceType;
+        }
+        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, contextualMapper) {
+            var elements = node.elements;
+            var element = elements[elementIndex];
+            if (element.kind !== 193) {
+                if (element.kind !== 191) {
+                    var propName = "" + elementIndex;
+                    var type = isTypeAny(sourceType)
+                        ? sourceType
+                        : isTupleLikeType(sourceType)
+                            ? getTypeOfPropertyOfType(sourceType, propName)
+                            : elementType;
+                    if (type) {
+                        return checkDestructuringAssignment(element, type, contextualMapper);
+                    }
+                    else {
+                        if (isTupleType(sourceType)) {
+                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), sourceType.elementTypes.length, elements.length);
+                        }
+                        else {
+                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
+                        }
+                    }
+                }
+                else {
+                    if (elementIndex < elements.length - 1) {
+                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                    }
+                    else {
+                        var restExpression = element.expression;
+                        if (restExpression.kind === 187 && restExpression.operatorToken.kind === 56) {
+                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                        }
+                        else {
+                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), contextualMapper);
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function checkDestructuringAssignment(exprOrAssignment, sourceType, contextualMapper) {
+            var target;
+            if (exprOrAssignment.kind === 254) {
+                var prop = exprOrAssignment;
+                if (prop.objectAssignmentInitializer) {
+                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, contextualMapper);
+                }
+                target = exprOrAssignment.name;
+            }
+            else {
+                target = exprOrAssignment;
+            }
+            if (target.kind === 187 && target.operatorToken.kind === 56) {
+                checkBinaryExpression(target, contextualMapper);
+                target = target.left;
+            }
+            if (target.kind === 171) {
+                return checkObjectLiteralAssignment(target, sourceType, contextualMapper);
+            }
+            if (target.kind === 170) {
+                return checkArrayLiteralAssignment(target, sourceType, contextualMapper);
+            }
+            return checkReferenceAssignment(target, sourceType, contextualMapper);
+        }
+        function checkReferenceAssignment(target, sourceType, contextualMapper) {
+            var targetType = checkExpression(target, contextualMapper);
+            if (checkReferenceExpression(target, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property)) {
+                checkTypeAssignableTo(sourceType, targetType, target, undefined);
+            }
+            return sourceType;
+        }
+        function isTypeEqualityComparableTo(source, target) {
+            return (target.flags & 96) !== 0 || isTypeComparableTo(source, target);
+        }
+        function checkBinaryExpression(node, contextualMapper) {
+            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, contextualMapper, node);
+        }
+        function checkBinaryLikeExpression(left, operatorToken, right, contextualMapper, errorNode) {
+            var operator = operatorToken.kind;
+            if (operator === 56 && (left.kind === 171 || left.kind === 170)) {
+                return checkDestructuringAssignment(left, checkExpression(right, contextualMapper), contextualMapper);
+            }
+            var leftType = checkExpression(left, contextualMapper);
+            var rightType = checkExpression(right, contextualMapper);
+            switch (operator) {
+                case 37:
+                case 38:
+                case 59:
+                case 60:
+                case 39:
+                case 61:
+                case 40:
+                case 62:
+                case 36:
+                case 58:
+                case 43:
+                case 63:
+                case 44:
+                case 64:
+                case 45:
+                case 65:
+                case 47:
+                case 67:
+                case 48:
+                case 68:
+                case 46:
+                case 66:
+                    if (leftType.flags & 96)
+                        leftType = rightType;
+                    if (rightType.flags & 96)
+                        rightType = leftType;
+                    leftType = getNonNullableType(leftType);
+                    rightType = getNonNullableType(rightType);
+                    var suggestedOperator = void 0;
+                    if ((leftType.flags & 8) &&
+                        (rightType.flags & 8) &&
+                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
+                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
+                    }
+                    else {
+                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        if (leftOk && rightOk) {
+                            checkAssignmentOperator(numberType);
+                        }
+                    }
+                    return numberType;
+                case 35:
+                case 57:
+                    if (leftType.flags & 96)
+                        leftType = rightType;
+                    if (rightType.flags & 96)
+                        rightType = leftType;
+                    leftType = getNonNullableType(leftType);
+                    rightType = getNonNullableType(rightType);
+                    var resultType = void 0;
+                    if (isTypeOfKind(leftType, 132) && isTypeOfKind(rightType, 132)) {
+                        resultType = numberType;
+                    }
+                    else {
+                        if (isTypeOfKind(leftType, 258) || isTypeOfKind(rightType, 258)) {
+                            resultType = stringType;
+                        }
+                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
+                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
+                        }
+                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
+                            return resultType;
+                        }
+                    }
+                    if (!resultType) {
+                        reportOperatorError();
+                        return anyType;
+                    }
+                    if (operator === 57) {
+                        checkAssignmentOperator(resultType);
+                    }
+                    return resultType;
+                case 25:
+                case 27:
+                case 28:
+                case 29:
+                    if (checkForDisallowedESSymbolOperand(operator)) {
+                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
+                            reportOperatorError();
+                        }
+                    }
+                    return booleanType;
+                case 30:
+                case 31:
+                case 32:
+                case 33:
+                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
+                        reportOperatorError();
+                    }
+                    return booleanType;
+                case 91:
+                    return checkInstanceOfExpression(left, right, leftType, rightType);
+                case 90:
+                    return checkInExpression(left, right, leftType, rightType);
+                case 51:
+                    return strictNullChecks ? addTypeKind(rightType, getCombinedTypeFlags(leftType) & 126) : rightType;
+                case 52:
+                    return getUnionType([getNonNullableType(leftType), rightType]);
+                case 56:
+                    checkAssignmentOperator(rightType);
+                    return getRegularTypeOfObjectLiteral(rightType);
+                case 24:
+                    return rightType;
+            }
+            function checkForDisallowedESSymbolOperand(operator) {
+                var offendingSymbolOperand = maybeTypeOfKind(leftType, 16777216) ? left :
+                    maybeTypeOfKind(rightType, 16777216) ? right :
+                        undefined;
+                if (offendingSymbolOperand) {
+                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
+                    return false;
+                }
+                return true;
+            }
+            function getSuggestedBooleanOperator(operator) {
+                switch (operator) {
+                    case 47:
+                    case 67:
+                        return 52;
+                    case 48:
+                    case 68:
+                        return 33;
+                    case 46:
+                    case 66:
+                        return 51;
+                    default:
+                        return undefined;
+                }
+            }
+            function checkAssignmentOperator(valueType) {
+                if (produceDiagnostics && operator >= 56 && operator <= 68) {
+                    var ok = checkReferenceExpression(left, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property);
+                    if (ok) {
+                        checkTypeAssignableTo(valueType, leftType, left, undefined);
+                    }
+                }
+            }
+            function reportOperatorError() {
+                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
+            }
+        }
+        function isYieldExpressionInClass(node) {
+            var current = node;
+            var parent = node.parent;
+            while (parent) {
+                if (ts.isFunctionLike(parent) && current === parent.body) {
+                    return false;
+                }
+                else if (ts.isClassLike(current)) {
+                    return true;
+                }
+                current = parent;
+                parent = parent.parent;
+            }
+            return false;
+        }
+        function checkYieldExpression(node) {
+            if (produceDiagnostics) {
+                if (!(node.flags & 8388608) || isYieldExpressionInClass(node)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
+                }
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
+                }
+            }
+            if (node.expression) {
+                var func = ts.getContainingFunction(node);
+                if (func && func.asteriskToken) {
+                    var expressionType = checkExpressionCached(node.expression, undefined);
+                    var expressionElementType = void 0;
+                    var nodeIsYieldStar = !!node.asteriskToken;
+                    if (nodeIsYieldStar) {
+                        expressionElementType = checkElementTypeOfIterable(expressionType, node.expression);
+                    }
+                    if (func.type) {
+                        var signatureElementType = getElementTypeOfIterableIterator(getTypeFromTypeNode(func.type)) || anyType;
+                        if (nodeIsYieldStar) {
+                            checkTypeAssignableTo(expressionElementType, signatureElementType, node.expression, undefined);
+                        }
+                        else {
+                            checkTypeAssignableTo(expressionType, signatureElementType, node.expression, undefined);
+                        }
+                    }
+                }
+            }
+            return anyType;
+        }
+        function checkConditionalExpression(node, contextualMapper) {
+            checkExpression(node.condition);
+            var type1 = checkExpression(node.whenTrue, contextualMapper);
+            var type2 = checkExpression(node.whenFalse, contextualMapper);
+            return getUnionType([type1, type2]);
+        }
+        function checkStringLiteralExpression(node) {
+            var contextualType = getContextualType(node);
+            if (contextualType && contextualTypeIsStringLiteralType(contextualType)) {
+                return getStringLiteralTypeForText(node.text);
+            }
+            return stringType;
+        }
+        function checkTemplateExpression(node) {
+            ts.forEach(node.templateSpans, function (templateSpan) {
+                checkExpression(templateSpan.expression);
+            });
+            return stringType;
+        }
+        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
+            var saveContextualType = node.contextualType;
+            node.contextualType = contextualType;
+            var result = checkExpression(node, contextualMapper);
+            node.contextualType = saveContextualType;
+            return result;
+        }
+        function checkExpressionCached(node, contextualMapper) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var saveFlowLoopStart = flowLoopStart;
+                flowLoopStart = flowLoopCount;
+                links.resolvedType = checkExpression(node, contextualMapper);
+                flowLoopStart = saveFlowLoopStart;
+            }
+            return links.resolvedType;
+        }
+        function checkPropertyAssignment(node, contextualMapper) {
+            if (node.name.kind === 140) {
+                checkComputedPropertyName(node.name);
+            }
+            return checkExpression(node.initializer, contextualMapper);
+        }
+        function checkObjectLiteralMethod(node, contextualMapper) {
+            checkGrammarMethod(node);
+            if (node.name.kind === 140) {
+                checkComputedPropertyName(node.name);
+            }
+            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
+            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
+        }
+        function instantiateTypeWithSingleGenericCallSignature(node, type, contextualMapper) {
+            if (isInferentialContext(contextualMapper)) {
+                var signature = getSingleCallSignature(type);
+                if (signature && signature.typeParameters) {
+                    var contextualType = getApparentTypeOfContextualType(node);
+                    if (contextualType) {
+                        var contextualSignature = getSingleCallSignature(contextualType);
+                        if (contextualSignature && !contextualSignature.typeParameters) {
+                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper));
+                        }
+                    }
+                }
+            }
+            return type;
+        }
+        function checkExpression(node, contextualMapper) {
+            var type;
+            if (node.kind === 139) {
+                type = checkQualifiedName(node);
+            }
+            else {
+                var uninstantiatedType = checkExpressionWorker(node, contextualMapper);
+                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
+            }
+            if (isConstEnumObjectType(type)) {
+                var ok = (node.parent.kind === 172 && node.parent.expression === node) ||
+                    (node.parent.kind === 173 && node.parent.expression === node) ||
+                    ((node.kind === 69 || node.kind === 139) && isInRightSideOfImportOrExportAssignment(node));
+                if (!ok) {
+                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
+                }
+            }
+            return type;
+        }
+        function checkNumericLiteral(node) {
+            checkGrammarNumericLiteral(node);
+            return numberType;
+        }
+        function checkExpressionWorker(node, contextualMapper) {
+            switch (node.kind) {
+                case 69:
+                    return checkIdentifier(node);
+                case 97:
+                    return checkThisExpression(node);
+                case 95:
+                    return checkSuperExpression(node);
+                case 93:
+                    return nullWideningType;
+                case 99:
+                case 84:
+                    return booleanType;
+                case 8:
+                    return checkNumericLiteral(node);
+                case 189:
+                    return checkTemplateExpression(node);
+                case 9:
+                    return checkStringLiteralExpression(node);
+                case 11:
+                    return stringType;
+                case 10:
+                    return globalRegExpType;
+                case 170:
+                    return checkArrayLiteral(node, contextualMapper);
+                case 171:
+                    return checkObjectLiteral(node, contextualMapper);
+                case 172:
+                    return checkPropertyAccessExpression(node);
+                case 173:
+                    return checkIndexedAccess(node);
+                case 174:
+                case 175:
+                    return checkCallExpression(node);
+                case 176:
+                    return checkTaggedTemplateExpression(node);
+                case 178:
+                    return checkExpression(node.expression, contextualMapper);
+                case 192:
+                    return checkClassExpression(node);
+                case 179:
+                case 180:
+                    return checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
+                case 182:
+                    return checkTypeOfExpression(node);
+                case 177:
+                case 195:
+                    return checkAssertion(node);
+                case 196:
+                    return checkNonNullAssertion(node);
+                case 181:
+                    return checkDeleteExpression(node);
+                case 183:
+                    return checkVoidExpression(node);
+                case 184:
+                    return checkAwaitExpression(node);
+                case 185:
+                    return checkPrefixUnaryExpression(node);
+                case 186:
+                    return checkPostfixUnaryExpression(node);
+                case 187:
+                    return checkBinaryExpression(node, contextualMapper);
+                case 188:
+                    return checkConditionalExpression(node, contextualMapper);
+                case 191:
+                    return checkSpreadElementExpression(node, contextualMapper);
+                case 193:
+                    return undefinedWideningType;
+                case 190:
+                    return checkYieldExpression(node);
+                case 248:
+                    return checkJsxExpression(node);
+                case 241:
+                    return checkJsxElement(node);
+                case 242:
+                    return checkJsxSelfClosingElement(node);
+                case 243:
+                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
+            }
+            return unknownType;
+        }
+        function checkTypeParameter(node) {
+            if (node.expression) {
+                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
+            }
+            checkSourceElement(node.constraint);
+            getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node)));
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
+            }
+        }
+        function checkParameter(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkVariableLikeDeclaration(node);
+            var func = ts.getContainingFunction(node);
+            if (node.flags & 92) {
+                func = ts.getContainingFunction(node);
+                if (!(func.kind === 148 && ts.nodeIsPresent(func.body))) {
+                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
+                }
+            }
+            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
+                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
+            }
+            if (node.name.text === "this") {
+                if (ts.indexOf(func.parameters, node) !== 0) {
+                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
+                }
+                if (func.kind === 148 || func.kind === 152 || func.kind === 157) {
+                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
+                }
+            }
+            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
+                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
+            }
+        }
+        function isSyntacticallyValidGenerator(node) {
+            if (!node.asteriskToken || !node.body) {
+                return false;
+            }
+            return node.kind === 147 ||
+                node.kind === 220 ||
+                node.kind === 179;
+        }
+        function getTypePredicateParameterIndex(parameterList, parameter) {
+            if (parameterList) {
+                for (var i = 0; i < parameterList.length; i++) {
+                    var param = parameterList[i];
+                    if (param.name.kind === 69 &&
+                        param.name.text === parameter.text) {
+                        return i;
+                    }
+                }
+            }
+            return -1;
+        }
+        function checkTypePredicate(node) {
+            var parent = getTypePredicateParent(node);
+            if (!parent) {
+                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
+                return;
+            }
+            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
+            if (!typePredicate) {
+                return;
+            }
+            var parameterName = node.parameterName;
+            if (ts.isThisTypePredicate(typePredicate)) {
+                getTypeFromThisTypeNode(parameterName);
+            }
+            else {
+                if (typePredicate.parameterIndex >= 0) {
+                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
+                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
+                    }
+                    else {
+                        var leadingError = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
+                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, undefined, leadingError);
+                    }
+                }
+                else if (parameterName) {
+                    var hasReportedError = false;
+                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
+                        var name_15 = _a[_i].name;
+                        if (ts.isBindingPattern(name_15) &&
+                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_15, parameterName, typePredicate.parameterName)) {
+                            hasReportedError = true;
+                            break;
+                        }
+                    }
+                    if (!hasReportedError) {
+                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
+                    }
+                }
+            }
+        }
+        function getTypePredicateParent(node) {
+            switch (node.parent.kind) {
+                case 180:
+                case 151:
+                case 220:
+                case 179:
+                case 156:
+                case 147:
+                case 146:
+                    var parent_10 = node.parent;
+                    if (node === parent_10.type) {
+                        return parent_10;
+                    }
+            }
+        }
+        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
+            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
+                var name_16 = _a[_i].name;
+                if (name_16.kind === 69 &&
+                    name_16.text === predicateVariableName) {
+                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
+                    return true;
+                }
+                else if (name_16.kind === 168 ||
+                    name_16.kind === 167) {
+                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_16, predicateVariableNode, predicateVariableName)) {
+                        return true;
+                    }
+                }
+            }
+        }
+        function checkSignatureDeclaration(node) {
+            if (node.kind === 153) {
+                checkGrammarIndexSignature(node);
+            }
+            else if (node.kind === 156 || node.kind === 220 || node.kind === 157 ||
+                node.kind === 151 || node.kind === 148 ||
+                node.kind === 152) {
+                checkGrammarFunctionLikeDeclaration(node);
+            }
+            checkTypeParameters(node.typeParameters);
+            ts.forEach(node.parameters, checkParameter);
+            if (node.type) {
+                checkSourceElement(node.type);
+            }
+            if (produceDiagnostics) {
+                checkCollisionWithArgumentsInGeneratedCode(node);
+                if (compilerOptions.noImplicitAny && !node.type) {
+                    switch (node.kind) {
+                        case 152:
+                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                        case 151:
+                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                    }
+                }
+                if (node.type) {
+                    if (languageVersion >= 2 && isSyntacticallyValidGenerator(node)) {
+                        var returnType = getTypeFromTypeNode(node.type);
+                        if (returnType === voidType) {
+                            error(node.type, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
+                        }
+                        else {
+                            var generatorElementType = getElementTypeOfIterableIterator(returnType) || anyType;
+                            var iterableIteratorInstantiation = createIterableIteratorType(generatorElementType);
+                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, node.type);
+                        }
+                    }
+                    else if (ts.isAsyncFunctionLike(node)) {
+                        checkAsyncFunctionReturnType(node);
+                    }
+                }
+            }
+        }
+        function checkClassForDuplicateDeclarations(node) {
+            var getter = 1, setter = 2, property = getter | setter;
+            var instanceNames = {};
+            var staticNames = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 148) {
+                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                        var param = _c[_b];
+                        if (ts.isParameterPropertyDeclaration(param)) {
+                            addName(instanceNames, param.name, param.name.text, property);
+                        }
+                    }
+                }
+                else {
+                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113; });
+                    var names = static ? staticNames : instanceNames;
+                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
+                    if (memberName) {
+                        switch (member.kind) {
+                            case 149:
+                                addName(names, member.name, memberName, getter);
+                                break;
+                            case 150:
+                                addName(names, member.name, memberName, setter);
+                                break;
+                            case 145:
+                                addName(names, member.name, memberName, property);
+                                break;
+                        }
+                    }
+                }
+            }
+            function addName(names, location, name, meaning) {
+                if (ts.hasProperty(names, name)) {
+                    var prev = names[name];
+                    if (prev & meaning) {
+                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                    }
+                    else {
+                        names[name] = prev | meaning;
+                    }
+                }
+                else {
+                    names[name] = meaning;
+                }
+            }
+        }
+        function checkObjectTypeForDuplicateDeclarations(node) {
+            var names = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind == 144) {
+                    var memberName = void 0;
+                    switch (member.name.kind) {
+                        case 9:
+                        case 8:
+                        case 69:
+                            memberName = member.name.text;
+                            break;
+                        default:
+                            continue;
+                    }
+                    if (ts.hasProperty(names, memberName)) {
+                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                    }
+                    else {
+                        names[memberName] = true;
+                    }
+                }
+            }
+        }
+        function checkTypeForDuplicateIndexSignatures(node) {
+            if (node.kind === 222) {
+                var nodeSymbol = getSymbolOfNode(node);
+                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
+                    return;
+                }
+            }
+            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
+            if (indexSymbol) {
+                var seenNumericIndexer = false;
+                var seenStringIndexer = false;
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var declaration = decl;
+                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
+                        switch (declaration.parameters[0].type.kind) {
+                            case 132:
+                                if (!seenStringIndexer) {
+                                    seenStringIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
+                                }
+                                break;
+                            case 130:
+                                if (!seenNumericIndexer) {
+                                    seenNumericIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
+                                }
+                                break;
+                        }
+                    }
+                }
+            }
+        }
+        function checkPropertyDeclaration(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
+            checkVariableLikeDeclaration(node);
+        }
+        function checkMethodDeclaration(node) {
+            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
+            checkFunctionOrMethodDeclaration(node);
+            if (node.flags & 128 && node.body) {
+                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
+            }
+        }
+        function checkConstructorDeclaration(node) {
+            checkSignatureDeclaration(node);
+            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
+            checkSourceElement(node.body);
+            var symbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
+            if (node === firstDeclaration) {
+                checkFunctionOrConstructorSymbol(symbol);
+            }
+            if (ts.nodeIsMissing(node.body)) {
+                return;
+            }
+            if (!produceDiagnostics) {
+                return;
+            }
+            function containsSuperCallAsComputedPropertyName(n) {
+                return n.name && containsSuperCall(n.name);
+            }
+            function containsSuperCall(n) {
+                if (ts.isSuperCallExpression(n)) {
+                    return true;
+                }
+                else if (ts.isFunctionLike(n)) {
+                    return false;
+                }
+                else if (ts.isClassLike(n)) {
+                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
+                }
+                return ts.forEachChild(n, containsSuperCall);
+            }
+            function markThisReferencesAsErrors(n) {
+                if (n.kind === 97) {
+                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                }
+                else if (n.kind !== 179 && n.kind !== 220) {
+                    ts.forEachChild(n, markThisReferencesAsErrors);
+                }
+            }
+            function isInstancePropertyWithInitializer(n) {
+                return n.kind === 145 &&
+                    !(n.flags & 32) &&
+                    !!n.initializer;
+            }
+            var containingClassDecl = node.parent;
+            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
+                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
+                var superCall = getSuperCallInConstructor(node);
+                if (superCall) {
+                    if (classExtendsNull) {
+                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
+                    }
+                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
+                        ts.forEach(node.parameters, function (p) { return p.flags & 92; });
+                    if (superCallShouldBeFirst) {
+                        var statements = node.body.statements;
+                        var superCallStatement = void 0;
+                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
+                            var statement = statements_2[_i];
+                            if (statement.kind === 202 && ts.isSuperCallExpression(statement.expression)) {
+                                superCallStatement = statement;
+                                break;
+                            }
+                            if (!ts.isPrologueDirective(statement)) {
+                                break;
+                            }
+                        }
+                        if (!superCallStatement) {
+                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
+                        }
+                    }
+                }
+                else if (!classExtendsNull) {
+                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
+                }
+            }
+        }
+        function checkAccessorDeclaration(node) {
+            if (produceDiagnostics) {
+                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
+                checkDecorators(node);
+                checkSignatureDeclaration(node);
+                if (node.kind === 149) {
+                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 32768)) {
+                        if (node.flags & 65536) {
+                            if (compilerOptions.noImplicitReturns) {
+                                error(node.name, ts.Diagnostics.Not_all_code_paths_return_a_value);
+                            }
+                        }
+                        else {
+                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
+                        }
+                    }
+                }
+                if (node.name.kind === 140) {
+                    checkComputedPropertyName(node.name);
+                }
+                if (!ts.hasDynamicName(node)) {
+                    var otherKind = node.kind === 149 ? 150 : 149;
+                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
+                    if (otherAccessor) {
+                        if (((node.flags & 28) !== (otherAccessor.flags & 28))) {
+                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
+                        }
+                        if (((node.flags & 128) !== (otherAccessor.flags & 128))) {
+                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
+                        }
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorThisType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
+                    }
+                }
+                getTypeOfAccessors(getSymbolOfNode(node));
+            }
+            if (node.parent.kind !== 171) {
+                checkSourceElement(node.body);
+            }
+            else {
+                checkNodeDeferred(node);
+            }
+        }
+        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
+            var firstType = getAnnotatedType(first);
+            var secondType = getAnnotatedType(second);
+            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
+                error(first, message);
+            }
+        }
+        function checkAccessorDeferred(node) {
+            checkSourceElement(node.body);
+        }
+        function checkMissingDeclaration(node) {
+            checkDecorators(node);
+        }
+        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
+            var typeArguments;
+            var mapper;
+            var result = true;
+            for (var i = 0; i < typeParameters.length; i++) {
+                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                if (constraint) {
+                    if (!typeArguments) {
+                        typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
+                        mapper = createTypeMapper(typeParameters, typeArguments);
+                    }
+                    var typeArgument = typeArguments[i];
+                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
+                }
+            }
+            return result;
+        }
+        function checkTypeReferenceNode(node) {
+            checkGrammarTypeArguments(node, node.typeArguments);
+            var type = getTypeFromTypeReference(node);
+            if (type !== unknownType && node.typeArguments) {
+                ts.forEach(node.typeArguments, checkSourceElement);
+                if (produceDiagnostics) {
+                    var symbol = getNodeLinks(node).resolvedSymbol;
+                    var typeParameters = symbol.flags & 524288 ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
+                    checkTypeArgumentConstraints(typeParameters, node.typeArguments);
+                }
+            }
+        }
+        function checkTypeQuery(node) {
+            getTypeFromTypeQueryNode(node);
+        }
+        function checkTypeLiteral(node) {
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
+            }
+        }
+        function checkArrayType(node) {
+            checkSourceElement(node.elementType);
+        }
+        function checkTupleType(node) {
+            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
+            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
+                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
+            }
+            ts.forEach(node.elementTypes, checkSourceElement);
+        }
+        function checkUnionOrIntersectionType(node) {
+            ts.forEach(node.types, checkSourceElement);
+        }
+        function isPrivateWithinAmbient(node) {
+            return (node.flags & 8) && ts.isInAmbientContext(node);
+        }
+        function getEffectiveDeclarationFlags(n, flagsToCheck) {
+            var flags = ts.getCombinedNodeFlags(n);
+            if (n.parent.kind !== 222 &&
+                n.parent.kind !== 221 &&
+                n.parent.kind !== 192 &&
+                ts.isInAmbientContext(n)) {
+                if (!(flags & 2)) {
+                    flags |= 1;
+                }
+                flags |= 2;
+            }
+            return flags & flagsToCheck;
+        }
+        function checkFunctionOrConstructorSymbol(symbol) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            function getCanonicalOverload(overloads, implementation) {
+                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
+                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
+            }
+            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
+                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
+                if (someButNotAllOverloadFlags !== 0) {
+                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
+                    ts.forEach(overloads, function (o) {
+                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
+                        if (deviation & 1) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                        }
+                        else if (deviation & 2) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                        }
+                        else if (deviation & (8 | 16)) {
+                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                        }
+                        else if (deviation & 128) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                        }
+                    });
+                }
+            }
+            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
+                if (someHaveQuestionToken !== allHaveQuestionToken) {
+                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
+                    ts.forEach(overloads, function (o) {
+                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
+                        if (deviation) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                        }
+                    });
+                }
+            }
+            var flagsToCheck = 1 | 2 | 8 | 16 | 128;
+            var someNodeFlags = 0;
+            var allNodeFlags = flagsToCheck;
+            var someHaveQuestionToken = false;
+            var allHaveQuestionToken = true;
+            var hasOverloads = false;
+            var bodyDeclaration;
+            var lastSeenNonAmbientDeclaration;
+            var previousDeclaration;
+            var declarations = symbol.declarations;
+            var isConstructor = (symbol.flags & 16384) !== 0;
+            function reportImplementationExpectedError(node) {
+                if (node.name && ts.nodeIsMissing(node.name)) {
+                    return;
+                }
+                var seen = false;
+                var subsequentNode = ts.forEachChild(node.parent, function (c) {
+                    if (seen) {
+                        return c;
+                    }
+                    else {
+                        seen = c === node;
+                    }
+                });
+                if (subsequentNode && subsequentNode.pos === node.end) {
+                    if (subsequentNode.kind === node.kind) {
+                        var errorNode_1 = subsequentNode.name || subsequentNode;
+                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
+                            var reportError = (node.kind === 147 || node.kind === 146) &&
+                                (node.flags & 32) !== (subsequentNode.flags & 32);
+                            if (reportError) {
+                                var diagnostic = node.flags & 32 ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
+                                error(errorNode_1, diagnostic);
+                            }
+                            return;
+                        }
+                        else if (ts.nodeIsPresent(subsequentNode.body)) {
+                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
+                            return;
+                        }
+                    }
+                }
+                var errorNode = node.name || node;
+                if (isConstructor) {
+                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
+                }
+                else {
+                    if (node.flags & 128) {
+                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
+                    }
+                    else {
+                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
+                    }
+                }
+            }
+            var isExportSymbolInsideModule = symbol.parent && symbol.parent.flags & 1536;
+            var duplicateFunctionDeclaration = false;
+            var multipleConstructorImplementation = false;
+            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
+                var current = declarations_4[_i];
+                var node = current;
+                var inAmbientContext = ts.isInAmbientContext(node);
+                var inAmbientContextOrInterface = node.parent.kind === 222 || node.parent.kind === 159 || inAmbientContext;
+                if (inAmbientContextOrInterface) {
+                    previousDeclaration = undefined;
+                }
+                if (node.kind === 220 || node.kind === 147 || node.kind === 146 || node.kind === 148) {
+                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
+                    someNodeFlags |= currentNodeFlags;
+                    allNodeFlags &= currentNodeFlags;
+                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
+                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
+                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
+                        if (isConstructor) {
+                            multipleConstructorImplementation = true;
+                        }
+                        else {
+                            duplicateFunctionDeclaration = true;
+                        }
+                    }
+                    else if (!isExportSymbolInsideModule && previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
+                        reportImplementationExpectedError(previousDeclaration);
+                    }
+                    if (ts.nodeIsPresent(node.body)) {
+                        if (!bodyDeclaration) {
+                            bodyDeclaration = node;
+                        }
+                    }
+                    else {
+                        hasOverloads = true;
+                    }
+                    previousDeclaration = node;
+                    if (!inAmbientContextOrInterface) {
+                        lastSeenNonAmbientDeclaration = node;
+                    }
+                }
+            }
+            if (multipleConstructorImplementation) {
+                ts.forEach(declarations, function (declaration) {
+                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
+                });
+            }
+            if (duplicateFunctionDeclaration) {
+                ts.forEach(declarations, function (declaration) {
+                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
+                });
+            }
+            if (!isExportSymbolInsideModule && lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
+                !(lastSeenNonAmbientDeclaration.flags & 128) && !lastSeenNonAmbientDeclaration.questionToken) {
+                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
+            }
+            if (hasOverloads) {
+                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
+                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
+                if (bodyDeclaration) {
+                    var signatures = getSignaturesOfSymbol(symbol);
+                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
+                    for (var _a = 0, signatures_3 = signatures; _a < signatures_3.length; _a++) {
+                        var signature = signatures_3[_a];
+                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
+                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+        function checkExportsOnMergedDeclarations(node) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            var symbol = node.localSymbol;
+            if (!symbol) {
+                symbol = getSymbolOfNode(node);
+                if (!(symbol.flags & 7340032)) {
+                    return;
+                }
+            }
+            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
+                return;
+            }
+            var exportedDeclarationSpaces = 0;
+            var nonExportedDeclarationSpaces = 0;
+            var defaultExportedDeclarationSpaces = 0;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var d = _a[_i];
+                var declarationSpaces = getDeclarationSpaces(d);
+                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 | 512);
+                if (effectiveDeclarationFlags & 1) {
+                    if (effectiveDeclarationFlags & 512) {
+                        defaultExportedDeclarationSpaces |= declarationSpaces;
+                    }
+                    else {
+                        exportedDeclarationSpaces |= declarationSpaces;
+                    }
+                }
+                else {
+                    nonExportedDeclarationSpaces |= declarationSpaces;
+                }
+            }
+            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
+            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
+                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
+                    var d = _c[_b];
+                    var declarationSpaces = getDeclarationSpaces(d);
+                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
+                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
+                    }
+                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
+                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
+                    }
+                }
+            }
+            function getDeclarationSpaces(d) {
+                switch (d.kind) {
+                    case 222:
+                        return 2097152;
+                    case 225:
+                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0
+                            ? 4194304 | 1048576
+                            : 4194304;
+                    case 221:
+                    case 224:
+                        return 2097152 | 1048576;
+                    case 229:
+                        var result_1 = 0;
+                        var target = resolveAlias(getSymbolOfNode(d));
+                        ts.forEach(target.declarations, function (d) { result_1 |= getDeclarationSpaces(d); });
+                        return result_1;
+                    default:
+                        return 1048576;
+                }
+            }
+        }
+        function checkNonThenableType(type, location, message) {
+            type = getWidenedType(type);
+            if (!isTypeAny(type) && isTypeAssignableTo(type, getGlobalThenableType())) {
+                if (location) {
+                    if (!message) {
+                        message = ts.Diagnostics.Operand_for_await_does_not_have_a_valid_callable_then_member;
+                    }
+                    error(location, message);
+                }
+                return unknownType;
+            }
+            return type;
+        }
+        function getPromisedType(promise) {
+            if (promise.flags & 1) {
+                return undefined;
+            }
+            if ((promise.flags & 4096) && promise.target === tryGetGlobalPromiseType()) {
+                return promise.typeArguments[0];
+            }
+            var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType();
+            if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) {
+                return undefined;
+            }
+            var thenFunction = getTypeOfPropertyOfType(promise, "then");
+            if (thenFunction && (thenFunction.flags & 1)) {
+                return undefined;
+            }
+            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0) : emptyArray;
+            if (thenSignatures.length === 0) {
+                return undefined;
+            }
+            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072);
+            if (onfulfilledParameterType.flags & 1) {
+                return undefined;
+            }
+            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0);
+            if (onfulfilledParameterSignatures.length === 0) {
+                return undefined;
+            }
+            var valueParameterType = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature));
+            return valueParameterType;
+        }
+        function getTypeOfFirstParameterOfSignature(signature) {
+            return getTypeAtPosition(signature, 0);
+        }
+        function getAwaitedType(type) {
+            return checkAwaitedType(type, undefined, undefined);
+        }
+        function checkAwaitedType(type, location, message) {
+            return checkAwaitedTypeWorker(type);
+            function checkAwaitedTypeWorker(type) {
+                if (type.flags & 16384) {
+                    var types = [];
+                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                        var constituentType = _a[_i];
+                        types.push(checkAwaitedTypeWorker(constituentType));
+                    }
+                    return getUnionType(types);
+                }
+                else {
+                    var promisedType = getPromisedType(type);
+                    if (promisedType === undefined) {
+                        return checkNonThenableType(type, location, message);
+                    }
+                    else {
+                        if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
+                            if (location) {
+                                error(location, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method, symbolToString(type.symbol));
+                            }
+                            return unknownType;
+                        }
+                        awaitedTypeStack.push(type.id);
+                        var awaitedType = checkAwaitedTypeWorker(promisedType);
+                        awaitedTypeStack.pop();
+                        return awaitedType;
+                    }
+                }
+            }
+        }
+        function checkCorrectPromiseType(returnType, location) {
+            if (returnType === unknownType) {
+                return unknownType;
+            }
+            var globalPromiseType = getGlobalPromiseType();
+            if (globalPromiseType === emptyGenericType
+                || globalPromiseType === getTargetType(returnType)) {
+                return checkAwaitedType(returnType, location, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+            }
+            error(location, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
+            return unknownType;
+        }
+        function checkAsyncFunctionReturnType(node) {
+            if (languageVersion >= 2) {
+                var returnType = getTypeFromTypeNode(node.type);
+                return checkCorrectPromiseType(returnType, node.type);
+            }
+            var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType();
+            if (globalPromiseConstructorLikeType === emptyObjectType) {
+                return unknownType;
+            }
+            var promiseType = getTypeFromTypeNode(node.type);
+            if (promiseType === unknownType && compilerOptions.isolatedModules) {
+                return unknownType;
+            }
+            var promiseConstructor = getNodeLinks(node.type).resolvedSymbol;
+            if (!promiseConstructor || !symbolIsValue(promiseConstructor)) {
+                var typeName = promiseConstructor
+                    ? symbolToString(promiseConstructor)
+                    : typeToString(promiseType);
+                error(node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName);
+                return unknownType;
+            }
+            checkReturnTypeAnnotationAsExpression(node);
+            var promiseConstructorType = getTypeOfSymbol(promiseConstructor);
+            if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) {
+                return unknownType;
+            }
+            var promiseName = ts.getEntityNameFromTypeNode(node.type);
+            var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName);
+            var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455);
+            if (rootSymbol) {
+                error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor));
+                return unknownType;
+            }
+            return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+        }
+        function checkDecorator(node) {
+            var signature = getResolvedSignature(node);
+            var returnType = getReturnTypeOfSignature(signature);
+            if (returnType.flags & 1) {
+                return;
+            }
+            var expectedReturnType;
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            var errorInfo;
+            switch (node.parent.kind) {
+                case 221:
+                    var classSymbol = getSymbolOfNode(node.parent);
+                    var classConstructorType = getTypeOfSymbol(classSymbol);
+                    expectedReturnType = getUnionType([classConstructorType, voidType]);
+                    break;
+                case 142:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 145:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 147:
+                case 149:
+                case 150:
+                    var methodType = getTypeOfNode(node.parent);
+                    var descriptorType = createTypedPropertyDescriptorType(methodType);
+                    expectedReturnType = getUnionType([descriptorType, voidType]);
+                    break;
+            }
+            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
+        }
+        function checkTypeNodeAsExpression(node) {
+            if (node && node.kind === 155) {
+                var root = getFirstIdentifier(node.typeName);
+                var meaning = root.parent.kind === 155 ? 793056 : 1536;
+                var rootSymbol = resolveName(root, root.text, meaning | 8388608, undefined, undefined);
+                if (rootSymbol && rootSymbol.flags & 8388608) {
+                    var aliasTarget = resolveAlias(rootSymbol);
+                    if (aliasTarget.flags & 107455 && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
+                        markAliasSymbolAsReferenced(rootSymbol);
+                    }
+                }
+            }
+        }
+        function checkTypeAnnotationAsExpression(node) {
+            checkTypeNodeAsExpression(node.type);
+        }
+        function checkReturnTypeAnnotationAsExpression(node) {
+            checkTypeNodeAsExpression(node.type);
+        }
+        function checkParameterTypeAnnotationsAsExpressions(node) {
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                checkTypeAnnotationAsExpression(parameter);
+            }
+        }
+        function checkDecorators(node) {
+            if (!node.decorators) {
+                return;
+            }
+            if (!ts.nodeCanBeDecorated(node)) {
+                return;
+            }
+            if (!compilerOptions.experimentalDecorators) {
+                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
+            }
+            if (compilerOptions.emitDecoratorMetadata) {
+                switch (node.kind) {
+                    case 221:
+                        var constructor = ts.getFirstConstructorWithBody(node);
+                        if (constructor) {
+                            checkParameterTypeAnnotationsAsExpressions(constructor);
+                        }
+                        break;
+                    case 147:
+                    case 149:
+                    case 150:
+                        checkParameterTypeAnnotationsAsExpressions(node);
+                        checkReturnTypeAnnotationAsExpression(node);
+                        break;
+                    case 145:
+                    case 142:
+                        checkTypeAnnotationAsExpression(node);
+                        break;
+                }
+            }
+            ts.forEach(node.decorators, checkDecorator);
+        }
+        function checkFunctionDeclaration(node) {
+            if (produceDiagnostics) {
+                checkFunctionOrMethodDeclaration(node) || checkGrammarForGenerator(node);
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+        }
+        function checkFunctionOrMethodDeclaration(node) {
+            checkDecorators(node);
+            checkSignatureDeclaration(node);
+            var isAsync = ts.isAsyncFunctionLike(node);
+            if (node.name && node.name.kind === 140) {
+                checkComputedPropertyName(node.name);
+            }
+            if (!ts.hasDynamicName(node)) {
+                var symbol = getSymbolOfNode(node);
+                var localSymbol = node.localSymbol || symbol;
+                var firstDeclaration = ts.forEach(localSymbol.declarations, function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
+                    declaration : undefined; });
+                if (node === firstDeclaration) {
+                    checkFunctionOrConstructorSymbol(localSymbol);
+                }
+                if (symbol.parent) {
+                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
+                        checkFunctionOrConstructorSymbol(symbol);
+                    }
+                }
+            }
+            checkSourceElement(node.body);
+            if (!node.asteriskToken) {
+                var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (produceDiagnostics && !node.type) {
+                if (compilerOptions.noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
+                    reportImplicitAnyError(node, anyType);
+                }
+                if (node.asteriskToken && ts.nodeIsPresent(node.body)) {
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+                }
+            }
+        }
+        function checkBlock(node) {
+            if (node.kind === 199) {
+                checkGrammarStatementInAmbientContext(node);
+            }
+            ts.forEach(node.statements, checkSourceElement);
+        }
+        function checkCollisionWithArgumentsInGeneratedCode(node) {
+            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
+                return;
+            }
+            ts.forEach(node.parameters, function (p) {
+                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
+                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
+                }
+            });
+        }
+        function needCollisionCheckForIdentifier(node, identifier, name) {
+            if (!(identifier && identifier.text === name)) {
+                return false;
+            }
+            if (node.kind === 145 ||
+                node.kind === 144 ||
+                node.kind === 147 ||
+                node.kind === 146 ||
+                node.kind === 149 ||
+                node.kind === 150) {
+                return false;
+            }
+            if (ts.isInAmbientContext(node)) {
+                return false;
+            }
+            var root = ts.getRootDeclaration(node);
+            if (root.kind === 142 && ts.nodeIsMissing(root.parent.body)) {
+                return false;
+            }
+            return true;
+        }
+        function checkCollisionWithCapturedThisVariable(node, name) {
+            if (needCollisionCheckForIdentifier(node, name, "_this")) {
+                potentialThisCollisions.push(node);
+            }
+        }
+        function checkIfThisIsCapturedInEnclosingScope(node) {
+            var current = node;
+            while (current) {
+                if (getNodeCheckFlags(current) & 4) {
+                    var isDeclaration_1 = node.kind !== 69;
+                    if (isDeclaration_1) {
+                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                    }
+                    else {
+                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
+                    }
+                    return;
+                }
+                current = current.parent;
+            }
+        }
+        function checkCollisionWithCapturedSuperVariable(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
+                return;
+            }
+            var enclosingClass = ts.getContainingClass(node);
+            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
+                return;
+            }
+            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
+                var isDeclaration_2 = node.kind !== 69;
+                if (isDeclaration_2) {
+                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
+                }
+                else {
+                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
+                }
+            }
+        }
+        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
+                return;
+            }
+            if (node.kind === 225 && ts.getModuleInstanceState(node) !== 1) {
+                return;
+            }
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 256 && ts.isExternalOrCommonJsModule(parent)) {
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            }
+        }
+        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "Promise")) {
+                return;
+            }
+            if (node.kind === 225 && ts.getModuleInstanceState(node) !== 1) {
+                return;
+            }
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 256 && ts.isExternalOrCommonJsModule(parent) && parent.flags & 2097152) {
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            }
+        }
+        function checkVarDeclaredNamesNotShadowed(node) {
+            if ((ts.getCombinedNodeFlags(node) & 3072) !== 0 || ts.isParameterDeclaration(node)) {
+                return;
+            }
+            if (node.kind === 218 && !node.initializer) {
+                return;
+            }
+            var symbol = getSymbolOfNode(node);
+            if (symbol.flags & 1) {
+                var localDeclarationSymbol = resolveName(node, node.name.text, 3, undefined, undefined);
+                if (localDeclarationSymbol &&
+                    localDeclarationSymbol !== symbol &&
+                    localDeclarationSymbol.flags & 2) {
+                    if (getDeclarationFlagsFromSymbol(localDeclarationSymbol) & 3072) {
+                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 219);
+                        var container = varDeclList.parent.kind === 200 && varDeclList.parent.parent
+                            ? varDeclList.parent.parent
+                            : undefined;
+                        var namesShareScope = container &&
+                            (container.kind === 199 && ts.isFunctionLike(container.parent) ||
+                                container.kind === 226 ||
+                                container.kind === 225 ||
+                                container.kind === 256);
+                        if (!namesShareScope) {
+                            var name_17 = symbolToString(localDeclarationSymbol);
+                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_17, name_17);
+                        }
+                    }
+                }
+            }
+        }
+        function checkParameterInitializer(node) {
+            if (ts.getRootDeclaration(node).kind !== 142) {
+                return;
+            }
+            var func = ts.getContainingFunction(node);
+            visit(node.initializer);
+            function visit(n) {
+                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
+                    return;
+                }
+                if (n.kind === 172) {
+                    return visit(n.expression);
+                }
+                else if (n.kind === 69) {
+                    var symbol = resolveName(n, n.text, 107455 | 8388608, undefined, undefined);
+                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
+                        return;
+                    }
+                    if (symbol.valueDeclaration === node) {
+                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
+                        return;
+                    }
+                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (enclosingContainer === func) {
+                        if (symbol.valueDeclaration.kind === 142) {
+                            if (symbol.valueDeclaration.pos < node.pos) {
+                                return;
+                            }
+                            var current = n;
+                            while (current !== node.initializer) {
+                                if (ts.isFunctionLike(current.parent)) {
+                                    return;
+                                }
+                                if (current.parent.kind === 145 &&
+                                    !(current.parent.flags & 32) &&
+                                    ts.isClassLike(current.parent.parent)) {
+                                    return;
+                                }
+                                current = current.parent;
+                            }
+                        }
+                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
+                    }
+                }
+                else {
+                    return ts.forEachChild(n, visit);
+                }
+            }
+        }
+        function checkVariableLikeDeclaration(node) {
+            checkDecorators(node);
+            checkSourceElement(node.type);
+            if (node.name.kind === 140) {
+                checkComputedPropertyName(node.name);
+                if (node.initializer) {
+                    checkExpressionCached(node.initializer);
+                }
+            }
+            if (node.kind === 169) {
+                if (node.propertyName && node.propertyName.kind === 140) {
+                    checkComputedPropertyName(node.propertyName);
+                }
+                var parent_11 = node.parent.parent;
+                var parentType = getTypeForBindingElementParent(parent_11);
+                var name_18 = node.propertyName || node.name;
+                var property = getPropertyOfType(parentType, getTextOfPropertyName(name_18));
+                if (parent_11.initializer && property && getParentOfSymbol(property)) {
+                    checkClassPropertyAccess(parent_11, parent_11.initializer, parentType, property);
+                }
+            }
+            if (ts.isBindingPattern(node.name)) {
+                ts.forEach(node.name.elements, checkSourceElement);
+            }
+            if (node.initializer && ts.getRootDeclaration(node).kind === 142 && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
+                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
+                return;
+            }
+            if (ts.isBindingPattern(node.name)) {
+                if (node.initializer && node.parent.parent.kind !== 207) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, undefined);
+                    checkParameterInitializer(node);
+                }
+                return;
+            }
+            var symbol = getSymbolOfNode(node);
+            var type = getTypeOfVariableOrParameterOrProperty(symbol);
+            if (node === symbol.valueDeclaration) {
+                if (node.initializer && node.parent.parent.kind !== 207) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, undefined);
+                    checkParameterInitializer(node);
+                }
+            }
+            else {
+                var declarationType = getWidenedTypeForVariableLikeDeclaration(node);
+                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
+                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
+                }
+                if (node.initializer) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, undefined);
+                }
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                }
+            }
+            if (node.kind !== 145 && node.kind !== 144) {
+                checkExportsOnMergedDeclarations(node);
+                if (node.kind === 218 || node.kind === 169) {
+                    checkVarDeclaredNamesNotShadowed(node);
+                }
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+        }
+        function areDeclarationFlagsIdentical(left, right) {
+            if ((left.kind === 142 && right.kind === 218) ||
+                (left.kind === 218 && right.kind === 142)) {
+                return true;
+            }
+            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
+                return false;
+            }
+            var interestingFlags = 8 |
+                16 |
+                256 |
+                128 |
+                64 |
+                32;
+            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
+        }
+        function checkVariableDeclaration(node) {
+            checkGrammarVariableDeclaration(node);
+            return checkVariableLikeDeclaration(node);
+        }
+        function checkBindingElement(node) {
+            checkGrammarBindingElement(node);
+            return checkVariableLikeDeclaration(node);
+        }
+        function checkVariableStatement(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
+            ts.forEach(node.declarationList.declarations, checkSourceElement);
+        }
+        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
+            if (node.modifiers && node.parent.kind === 171) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    if (node.modifiers.length > 1) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                }
+                else {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                }
+            }
+        }
+        function checkExpressionStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+        }
+        function checkIfStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.thenStatement);
+            if (node.thenStatement.kind === 201) {
+                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
+            }
+            checkSourceElement(node.elseStatement);
+        }
+        function checkDoStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkSourceElement(node.statement);
+            checkExpression(node.expression);
+        }
+        function checkWhileStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.statement);
+        }
+        function checkForStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.initializer && node.initializer.kind === 219) {
+                    checkGrammarVariableDeclarationList(node.initializer);
+                }
+            }
+            if (node.initializer) {
+                if (node.initializer.kind === 219) {
+                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
+                }
+                else {
+                    checkExpression(node.initializer);
+                }
+            }
+            if (node.condition)
+                checkExpression(node.condition);
+            if (node.incrementor)
+                checkExpression(node.incrementor);
+            checkSourceElement(node.statement);
+        }
+        function checkForOfStatement(node) {
+            checkGrammarForInOrForOfStatement(node);
+            if (node.initializer.kind === 219) {
+                checkForInOrForOfVariableDeclaration(node);
+            }
+            else {
+                var varExpr = node.initializer;
+                var iteratedType = checkRightHandSideOfForOf(node.expression);
+                if (varExpr.kind === 170 || varExpr.kind === 171) {
+                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
+                }
+                else {
+                    var leftType = checkExpression(varExpr);
+                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_of_statement, ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property);
+                    if (iteratedType) {
+                        checkTypeAssignableTo(iteratedType, leftType, varExpr, undefined);
+                    }
+                }
+            }
+            checkSourceElement(node.statement);
+        }
+        function checkForInStatement(node) {
+            checkGrammarForInOrForOfStatement(node);
+            if (node.initializer.kind === 219) {
+                var variable = node.initializer.declarations[0];
+                if (variable && ts.isBindingPattern(variable.name)) {
+                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                }
+                checkForInOrForOfVariableDeclaration(node);
+            }
+            else {
+                var varExpr = node.initializer;
+                var leftType = checkExpression(varExpr);
+                if (varExpr.kind === 170 || varExpr.kind === 171) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                }
+                else if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258)) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
+                }
+                else {
+                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_in_statement, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property);
+                }
+            }
+            var rightType = checkNonNullExpression(node.expression);
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 | 512)) {
+                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            checkSourceElement(node.statement);
+        }
+        function checkForInOrForOfVariableDeclaration(iterationStatement) {
+            var variableDeclarationList = iterationStatement.initializer;
+            if (variableDeclarationList.declarations.length >= 1) {
+                var decl = variableDeclarationList.declarations[0];
+                checkVariableDeclaration(decl);
+            }
+        }
+        function checkRightHandSideOfForOf(rhsExpression) {
+            var expressionType = checkNonNullExpression(rhsExpression);
+            return checkIteratedTypeOrElementType(expressionType, rhsExpression, true);
+        }
+        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput) {
+            if (isTypeAny(inputType)) {
+                return inputType;
+            }
+            if (languageVersion >= 2) {
+                return checkElementTypeOfIterable(inputType, errorNode);
+            }
+            if (allowStringInput) {
+                return checkElementTypeOfArrayOrString(inputType, errorNode);
+            }
+            if (isArrayLikeType(inputType)) {
+                var indexType = getIndexTypeOfType(inputType, 1);
+                if (indexType) {
+                    return indexType;
+                }
+            }
+            if (errorNode) {
+                error(errorNode, ts.Diagnostics.Type_0_is_not_an_array_type, typeToString(inputType));
+            }
+            return unknownType;
+        }
+        function checkElementTypeOfIterable(iterable, errorNode) {
+            var elementType = getElementTypeOfIterable(iterable, errorNode);
+            if (errorNode && elementType) {
+                checkTypeAssignableTo(iterable, createIterableType(elementType), errorNode);
+            }
+            return elementType || anyType;
+        }
+        function getElementTypeOfIterable(type, errorNode) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            var typeAsIterable = type;
+            if (!typeAsIterable.iterableElementType) {
+                if ((type.flags & 4096) && type.target === getGlobalIterableType()) {
+                    typeAsIterable.iterableElementType = type.typeArguments[0];
+                }
+                else {
+                    var iteratorFunction = getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator"));
+                    if (isTypeAny(iteratorFunction)) {
+                        return undefined;
+                    }
+                    var iteratorFunctionSignatures = iteratorFunction ? getSignaturesOfType(iteratorFunction, 0) : emptyArray;
+                    if (iteratorFunctionSignatures.length === 0) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
+                        }
+                        return undefined;
+                    }
+                    typeAsIterable.iterableElementType = getElementTypeOfIterator(getUnionType(ts.map(iteratorFunctionSignatures, getReturnTypeOfSignature)), errorNode);
+                }
+            }
+            return typeAsIterable.iterableElementType;
+        }
+        function getElementTypeOfIterator(type, errorNode) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            var typeAsIterator = type;
+            if (!typeAsIterator.iteratorElementType) {
+                if ((type.flags & 4096) && type.target === getGlobalIteratorType()) {
+                    typeAsIterator.iteratorElementType = type.typeArguments[0];
+                }
+                else {
+                    var iteratorNextFunction = getTypeOfPropertyOfType(type, "next");
+                    if (isTypeAny(iteratorNextFunction)) {
+                        return undefined;
+                    }
+                    var iteratorNextFunctionSignatures = iteratorNextFunction ? getSignaturesOfType(iteratorNextFunction, 0) : emptyArray;
+                    if (iteratorNextFunctionSignatures.length === 0) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.An_iterator_must_have_a_next_method);
+                        }
+                        return undefined;
+                    }
+                    var iteratorNextResult = getUnionType(ts.map(iteratorNextFunctionSignatures, getReturnTypeOfSignature));
+                    if (isTypeAny(iteratorNextResult)) {
+                        return undefined;
+                    }
+                    var iteratorNextValue = getTypeOfPropertyOfType(iteratorNextResult, "value");
+                    if (!iteratorNextValue) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
+                        }
+                        return undefined;
+                    }
+                    typeAsIterator.iteratorElementType = iteratorNextValue;
+                }
+            }
+            return typeAsIterator.iteratorElementType;
+        }
+        function getElementTypeOfIterableIterator(type) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            if ((type.flags & 4096) && type.target === getGlobalIterableIteratorType()) {
+                return type.typeArguments[0];
+            }
+            return getElementTypeOfIterable(type, undefined) ||
+                getElementTypeOfIterator(type, undefined);
+        }
+        function checkElementTypeOfArrayOrString(arrayOrStringType, errorNode) {
+            ts.Debug.assert(languageVersion < 2);
+            var arrayType = arrayOrStringType;
+            if (arrayOrStringType.flags & 16384) {
+                arrayType = getUnionType(ts.filter(arrayOrStringType.types, function (t) { return !(t.flags & 258); }));
+            }
+            else if (arrayOrStringType.flags & 258) {
+                arrayType = neverType;
+            }
+            var hasStringConstituent = arrayOrStringType !== arrayType;
+            var reportedError = false;
+            if (hasStringConstituent) {
+                if (languageVersion < 1) {
+                    error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
+                    reportedError = true;
+                }
+                if (arrayType === neverType) {
+                    return stringType;
+                }
+            }
+            if (!isArrayLikeType(arrayType)) {
+                if (!reportedError) {
+                    var diagnostic = hasStringConstituent
+                        ? ts.Diagnostics.Type_0_is_not_an_array_type
+                        : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
+                    error(errorNode, diagnostic, typeToString(arrayType));
+                }
+                return hasStringConstituent ? stringType : unknownType;
+            }
+            var arrayElementType = getIndexTypeOfType(arrayType, 1) || unknownType;
+            if (hasStringConstituent) {
+                if (arrayElementType.flags & 258) {
+                    return stringType;
+                }
+                return getUnionType([arrayElementType, stringType]);
+            }
+            return arrayElementType;
+        }
+        function checkBreakOrContinueStatement(node) {
+            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
+        }
+        function isGetAccessorWithAnnotatedSetAccessor(node) {
+            return !!(node.kind === 149 && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 150)));
+        }
+        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
+            var unwrappedReturnType = ts.isAsyncFunctionLike(func) ? getPromisedType(returnType) : returnType;
+            return maybeTypeOfKind(unwrappedReturnType, 16 | 1);
+        }
+        function checkReturnStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                var functionBlock = ts.getContainingFunction(node);
+                if (!functionBlock) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
+                }
+            }
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var signature = getSignatureFromDeclaration(func);
+                var returnType = getReturnTypeOfSignature(signature);
+                if (strictNullChecks || node.expression || returnType === neverType) {
+                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
+                    if (func.asteriskToken) {
+                        return;
+                    }
+                    if (func.kind === 150) {
+                        if (node.expression) {
+                            error(node.expression, ts.Diagnostics.Setters_cannot_return_a_value);
+                        }
+                    }
+                    else if (func.kind === 148) {
+                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node.expression)) {
+                            error(node.expression, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
+                        }
+                    }
+                    else if (func.type || isGetAccessorWithAnnotatedSetAccessor(func)) {
+                        if (ts.isAsyncFunctionLike(func)) {
+                            var promisedType = getPromisedType(returnType);
+                            var awaitedType = checkAwaitedType(exprType, node.expression || node, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                            if (promisedType) {
+                                checkTypeAssignableTo(awaitedType, promisedType, node.expression || node);
+                            }
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnType, node.expression || node);
+                        }
+                    }
+                }
+                else if (func.kind !== 148 && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
+                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
+                }
+            }
+        }
+        function checkWithStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.flags & 33554432) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
+                }
+            }
+            checkExpression(node.expression);
+            error(node.expression, ts.Diagnostics.All_symbols_within_a_with_block_will_be_resolved_to_any);
+        }
+        function checkSwitchStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            var firstDefaultClause;
+            var hasDuplicateDefaultClause = false;
+            var expressionType = checkExpression(node.expression);
+            ts.forEach(node.caseBlock.clauses, function (clause) {
+                if (clause.kind === 250 && !hasDuplicateDefaultClause) {
+                    if (firstDefaultClause === undefined) {
+                        firstDefaultClause = clause;
+                    }
+                    else {
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
+                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
+                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
+                        hasDuplicateDefaultClause = true;
+                    }
+                }
+                if (produceDiagnostics && clause.kind === 249) {
+                    var caseClause = clause;
+                    var caseType = checkExpression(caseClause.expression);
+                    if (!isTypeEqualityComparableTo(expressionType, caseType)) {
+                        checkTypeComparableTo(caseType, expressionType, caseClause.expression, undefined);
+                    }
+                }
+                ts.forEach(clause.statements, checkSourceElement);
+            });
+        }
+        function checkLabeledStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                var current = node.parent;
+                while (current) {
+                    if (ts.isFunctionLike(current)) {
+                        break;
+                    }
+                    if (current.kind === 214 && current.label.text === node.label.text) {
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
+                        break;
+                    }
+                    current = current.parent;
+                }
+            }
+            checkSourceElement(node.statement);
+        }
+        function checkThrowStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.expression === undefined) {
+                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
+                }
+            }
+            if (node.expression) {
+                checkExpression(node.expression);
+            }
+        }
+        function checkTryStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkBlock(node.tryBlock);
+            var catchClause = node.catchClause;
+            if (catchClause) {
+                if (catchClause.variableDeclaration) {
+                    if (catchClause.variableDeclaration.name.kind !== 69) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.name, ts.Diagnostics.Catch_clause_variable_name_must_be_an_identifier);
+                    }
+                    else if (catchClause.variableDeclaration.type) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
+                    }
+                    else if (catchClause.variableDeclaration.initializer) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
+                    }
+                    else {
+                        var identifierName = catchClause.variableDeclaration.name.text;
+                        var locals = catchClause.block.locals;
+                        if (locals && ts.hasProperty(locals, identifierName)) {
+                            var localSymbol = locals[identifierName];
+                            if (localSymbol && (localSymbol.flags & 2) !== 0) {
+                                grammarErrorOnNode(localSymbol.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, identifierName);
+                            }
+                        }
+                    }
+                }
+                checkBlock(catchClause.block);
+            }
+            if (node.finallyBlock) {
+                checkBlock(node.finallyBlock);
+            }
+        }
+        function checkIndexConstraints(type) {
+            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1);
+            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0);
+            var stringIndexType = getIndexTypeOfType(type, 0);
+            var numberIndexType = getIndexTypeOfType(type, 1);
+            if (stringIndexType || numberIndexType) {
+                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
+                    var propType = getTypeOfSymbol(prop);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1);
+                });
+                if (type.flags & 1024 && ts.isClassLike(type.symbol.valueDeclaration)) {
+                    var classDeclaration = type.symbol.valueDeclaration;
+                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        if (!(member.flags & 32) && ts.hasDynamicName(member)) {
+                            var propType = getTypeOfSymbol(member.symbol);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1);
+                        }
+                    }
+                }
+            }
+            var errorNode;
+            if (stringIndexType && numberIndexType) {
+                errorNode = declaredNumberIndexer || declaredStringIndexer;
+                if (!errorNode && (type.flags & 2048)) {
+                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0) && getIndexTypeOfType(base, 1); });
+                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
+                }
+            }
+            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
+                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
+            }
+            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
+                if (!indexType) {
+                    return;
+                }
+                if (indexKind === 1 && !isNumericName(prop.valueDeclaration.name)) {
+                    return;
+                }
+                var errorNode;
+                if (prop.valueDeclaration.name.kind === 140 || prop.parent === containingType.symbol) {
+                    errorNode = prop.valueDeclaration;
+                }
+                else if (indexDeclaration) {
+                    errorNode = indexDeclaration;
+                }
+                else if (containingType.flags & 2048) {
+                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
+                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
+                }
+                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
+                    var errorMessage = indexKind === 0
+                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
+                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
+                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
+                }
+            }
+        }
+        function checkTypeNameIsReserved(name, message) {
+            switch (name.text) {
+                case "any":
+                case "number":
+                case "boolean":
+                case "string":
+                case "symbol":
+                case "void":
+                    error(name, message, name.text);
+            }
+        }
+        function checkTypeParameters(typeParameterDeclarations) {
+            if (typeParameterDeclarations) {
+                for (var i = 0, n = typeParameterDeclarations.length; i < n; i++) {
+                    var node = typeParameterDeclarations[i];
+                    checkTypeParameter(node);
+                    if (produceDiagnostics) {
+                        for (var j = 0; j < i; j++) {
+                            if (typeParameterDeclarations[j].symbol === node.symbol) {
+                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        function checkTypeParameterListsIdentical(node, symbol) {
+            if (symbol.declarations.length === 1) {
+                return;
+            }
+            var firstDecl;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 221 || declaration.kind === 222) {
+                    if (!firstDecl) {
+                        firstDecl = declaration;
+                    }
+                    else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) {
+                        error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text);
+                    }
+                }
+            }
+        }
+        function checkClassExpression(node) {
+            checkClassLikeDeclaration(node);
+            checkNodeDeferred(node);
+            return getTypeOfSymbol(getSymbolOfNode(node));
+        }
+        function checkClassExpressionDeferred(node) {
+            ts.forEach(node.members, checkSourceElement);
+        }
+        function checkClassDeclaration(node) {
+            if (!node.name && !(node.flags & 512)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
+            }
+            checkClassLikeDeclaration(node);
+            ts.forEach(node.members, checkSourceElement);
+        }
+        function checkClassLikeDeclaration(node) {
+            checkGrammarClassDeclarationHeritageClauses(node);
+            checkDecorators(node);
+            if (node.name) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+            checkTypeParameters(node.typeParameters);
+            checkExportsOnMergedDeclarations(node);
+            var symbol = getSymbolOfNode(node);
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var typeWithThis = getTypeWithThisArgument(type);
+            var staticType = getTypeOfSymbol(symbol);
+            checkTypeParameterListsIdentical(node, symbol);
+            checkClassForDuplicateDeclarations(node);
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            if (baseTypeNode) {
+                var baseTypes = getBaseTypes(type);
+                if (baseTypes.length && produceDiagnostics) {
+                    var baseType_1 = baseTypes[0];
+                    var staticBaseType = getBaseConstructorTypeOfClass(type);
+                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
+                    checkSourceElement(baseTypeNode.expression);
+                    if (baseTypeNode.typeArguments) {
+                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
+                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments); _i < _a.length; _i++) {
+                            var constructor = _a[_i];
+                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
+                                break;
+                            }
+                        }
+                    }
+                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
+                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
+                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32)) {
+                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
+                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
+                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
+                        }
+                    }
+                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
+                }
+            }
+            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
+            if (implementedTypeNodes) {
+                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
+                    var typeRefNode = implementedTypeNodes_1[_b];
+                    if (!ts.isSupportedExpressionWithTypeArguments(typeRefNode)) {
+                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                    }
+                    checkTypeReferenceNode(typeRefNode);
+                    if (produceDiagnostics) {
+                        var t = getTypeFromTypeNode(typeRefNode);
+                        if (t !== unknownType) {
+                            var declaredType = (t.flags & 4096) ? t.target : t;
+                            if (declaredType.flags & (1024 | 2048)) {
+                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
+                            }
+                            else {
+                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
+                            }
+                        }
+                    }
+                }
+            }
+            if (produceDiagnostics) {
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+            }
+        }
+        function checkBaseTypeAccessibility(type, node) {
+            var signatures = getSignaturesOfType(type, 1);
+            if (signatures.length) {
+                var declaration = signatures[0].declaration;
+                if (declaration && declaration.flags & 8) {
+                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
+                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
+                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, node.expression.text);
+                    }
+                }
+            }
+        }
+        function getTargetSymbol(s) {
+            return s.flags & 16777216 ? getSymbolLinks(s).target : s;
+        }
+        function getClassLikeDeclarationOfSymbol(symbol) {
+            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
+        }
+        function checkKindsOfPropertyMemberOverrides(type, baseType) {
+            var baseProperties = getPropertiesOfObjectType(baseType);
+            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
+                var baseProperty = baseProperties_1[_i];
+                var base = getTargetSymbol(baseProperty);
+                if (base.flags & 134217728) {
+                    continue;
+                }
+                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
+                var baseDeclarationFlags = getDeclarationFlagsFromSymbol(base);
+                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
+                if (derived) {
+                    if (derived === base) {
+                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
+                        if (baseDeclarationFlags & 128 && (!derivedClassDecl || !(derivedClassDecl.flags & 128))) {
+                            if (derivedClassDecl.kind === 192) {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
+                            }
+                            else {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
+                            }
+                        }
+                    }
+                    else {
+                        var derivedDeclarationFlags = getDeclarationFlagsFromSymbol(derived);
+                        if ((baseDeclarationFlags & 8) || (derivedDeclarationFlags & 8)) {
+                            continue;
+                        }
+                        if ((baseDeclarationFlags & 32) !== (derivedDeclarationFlags & 32)) {
+                            continue;
+                        }
+                        if ((base.flags & derived.flags & 8192) || ((base.flags & 98308) && (derived.flags & 98308))) {
+                            continue;
+                        }
+                        var errorMessage = void 0;
+                        if (base.flags & 8192) {
+                            if (derived.flags & 98304) {
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
+                            }
+                            else {
+                                ts.Debug.assert((derived.flags & 4) !== 0);
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
+                            }
+                        }
+                        else if (base.flags & 4) {
+                            ts.Debug.assert((derived.flags & 8192) !== 0);
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
+                        }
+                        else {
+                            ts.Debug.assert((base.flags & 98304) !== 0);
+                            ts.Debug.assert((derived.flags & 8192) !== 0);
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
+                        }
+                        error(derived.valueDeclaration.name, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                    }
+                }
+            }
+        }
+        function isAccessor(kind) {
+            return kind === 149 || kind === 150;
+        }
+        function areTypeParametersIdentical(list1, list2) {
+            if (!list1 && !list2) {
+                return true;
+            }
+            if (!list1 || !list2 || list1.length !== list2.length) {
+                return false;
+            }
+            for (var i = 0, len = list1.length; i < len; i++) {
+                var tp1 = list1[i];
+                var tp2 = list2[i];
+                if (tp1.name.text !== tp2.name.text) {
+                    return false;
+                }
+                if (!tp1.constraint && !tp2.constraint) {
+                    continue;
+                }
+                if (!tp1.constraint || !tp2.constraint) {
+                    return false;
+                }
+                if (!isTypeIdenticalTo(getTypeFromTypeNode(tp1.constraint), getTypeFromTypeNode(tp2.constraint))) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkInheritedPropertiesAreIdentical(type, typeNode) {
+            var baseTypes = getBaseTypes(type);
+            if (baseTypes.length < 2) {
+                return true;
+            }
+            var seen = {};
+            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen[p.name] = { prop: p, containingType: type }; });
+            var ok = true;
+            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
+                var base = baseTypes_2[_i];
+                var properties = getPropertiesOfObjectType(getTypeWithThisArgument(base, type.thisType));
+                for (var _a = 0, properties_4 = properties; _a < properties_4.length; _a++) {
+                    var prop = properties_4[_a];
+                    if (!ts.hasProperty(seen, prop.name)) {
+                        seen[prop.name] = { prop: prop, containingType: base };
+                    }
+                    else {
+                        var existing = seen[prop.name];
+                        var isInheritedProperty = existing.containingType !== type;
+                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
+                            ok = false;
+                            var typeName1 = typeToString(existing.containingType);
+                            var typeName2 = typeToString(base);
+                            var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
+                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
+                        }
+                    }
+                }
+            }
+            return ok;
+        }
+        function checkInterfaceDeclaration(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
+            checkTypeParameters(node.typeParameters);
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                checkTypeParameterListsIdentical(node, symbol);
+                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 222);
+                if (node === firstInterfaceDecl) {
+                    var type = getDeclaredTypeOfSymbol(symbol);
+                    var typeWithThis = getTypeWithThisArgument(type);
+                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
+                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
+                            var baseType = _a[_i];
+                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
+                        }
+                        checkIndexConstraints(type);
+                    }
+                }
+                checkObjectTypeForDuplicateDeclarations(node);
+            }
+            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
+                if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
+                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                }
+                checkTypeReferenceNode(heritageElement);
+            });
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                checkTypeForDuplicateIndexSignatures(node);
+            }
+        }
+        function checkTypeAliasDeclaration(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
+            checkSourceElement(node.type);
+        }
+        function computeEnumMemberValues(node) {
+            var nodeLinks = getNodeLinks(node);
+            if (!(nodeLinks.flags & 16384)) {
+                var enumSymbol = getSymbolOfNode(node);
+                var enumType = getDeclaredTypeOfSymbol(enumSymbol);
+                var autoValue = 0;
+                var ambient = ts.isInAmbientContext(node);
+                var enumIsConst = ts.isConst(node);
+                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                    var member = _a[_i];
+                    if (isComputedNonLiteralName(member.name)) {
+                        error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
+                    }
+                    else {
+                        var text = getTextOfPropertyName(member.name);
+                        if (isNumericLiteralName(text)) {
+                            error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
+                        }
+                    }
+                    var previousEnumMemberIsNonConstant = autoValue === undefined;
+                    var initializer = member.initializer;
+                    if (initializer) {
+                        autoValue = computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient);
+                    }
+                    else if (ambient && !enumIsConst) {
+                        autoValue = undefined;
+                    }
+                    else if (previousEnumMemberIsNonConstant) {
+                        error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
+                    }
+                    if (autoValue !== undefined) {
+                        getNodeLinks(member).enumMemberValue = autoValue;
+                        autoValue++;
+                    }
+                }
+                nodeLinks.flags |= 16384;
+            }
+            function computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient) {
+                var reportError = true;
+                var value = evalConstant(initializer);
+                if (reportError) {
+                    if (value === undefined) {
+                        if (enumIsConst) {
+                            error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
+                        }
+                        else if (ambient) {
+                            error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
+                        }
+                        else {
+                            checkTypeAssignableTo(checkExpression(initializer), enumType, initializer, undefined);
+                        }
+                    }
+                    else if (enumIsConst) {
+                        if (isNaN(value)) {
+                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN);
+                        }
+                        else if (!isFinite(value)) {
+                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
+                        }
+                    }
+                }
+                return value;
+                function evalConstant(e) {
+                    switch (e.kind) {
+                        case 185:
+                            var value_1 = evalConstant(e.operand);
+                            if (value_1 === undefined) {
+                                return undefined;
+                            }
+                            switch (e.operator) {
+                                case 35: return value_1;
+                                case 36: return -value_1;
+                                case 50: return ~value_1;
+                            }
+                            return undefined;
+                        case 187:
+                            var left = evalConstant(e.left);
+                            if (left === undefined) {
+                                return undefined;
+                            }
+                            var right = evalConstant(e.right);
+                            if (right === undefined) {
+                                return undefined;
+                            }
+                            switch (e.operatorToken.kind) {
+                                case 47: return left | right;
+                                case 46: return left & right;
+                                case 44: return left >> right;
+                                case 45: return left >>> right;
+                                case 43: return left << right;
+                                case 48: return left ^ right;
+                                case 37: return left * right;
+                                case 39: return left / right;
+                                case 35: return left + right;
+                                case 36: return left - right;
+                                case 40: return left % right;
+                            }
+                            return undefined;
+                        case 8:
+                            return +e.text;
+                        case 178:
+                            return evalConstant(e.expression);
+                        case 69:
+                        case 173:
+                        case 172:
+                            var member = initializer.parent;
+                            var currentType = getTypeOfSymbol(getSymbolOfNode(member.parent));
+                            var enumType_1;
+                            var propertyName = void 0;
+                            if (e.kind === 69) {
+                                enumType_1 = currentType;
+                                propertyName = e.text;
+                            }
+                            else {
+                                var expression = void 0;
+                                if (e.kind === 173) {
+                                    if (e.argumentExpression === undefined ||
+                                        e.argumentExpression.kind !== 9) {
+                                        return undefined;
+                                    }
+                                    expression = e.expression;
+                                    propertyName = e.argumentExpression.text;
+                                }
+                                else {
+                                    expression = e.expression;
+                                    propertyName = e.name.text;
+                                }
+                                var current = expression;
+                                while (current) {
+                                    if (current.kind === 69) {
+                                        break;
+                                    }
+                                    else if (current.kind === 172) {
+                                        current = current.expression;
+                                    }
+                                    else {
+                                        return undefined;
+                                    }
+                                }
+                                enumType_1 = checkExpression(expression);
+                                if (!(enumType_1.symbol && (enumType_1.symbol.flags & 384))) {
+                                    return undefined;
+                                }
+                            }
+                            if (propertyName === undefined) {
+                                return undefined;
+                            }
+                            var property = getPropertyOfObjectType(enumType_1, propertyName);
+                            if (!property || !(property.flags & 8)) {
+                                return undefined;
+                            }
+                            var propertyDecl = property.valueDeclaration;
+                            if (member === propertyDecl) {
+                                return undefined;
+                            }
+                            if (!isBlockScopedNameDeclaredBeforeUse(propertyDecl, member)) {
+                                reportError = false;
+                                error(e, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
+                                return undefined;
+                            }
+                            return getNodeLinks(propertyDecl).enumMemberValue;
+                    }
+                }
+            }
+        }
+        function checkEnumDeclaration(node) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkExportsOnMergedDeclarations(node);
+            computeEnumMemberValues(node);
+            var enumIsConst = ts.isConst(node);
+            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
+                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
+            }
+            var enumSymbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
+            if (node === firstDeclaration) {
+                if (enumSymbol.declarations.length > 1) {
+                    ts.forEach(enumSymbol.declarations, function (decl) {
+                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
+                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                        }
+                    });
+                }
+                var seenEnumMissingInitialInitializer_1 = false;
+                ts.forEach(enumSymbol.declarations, function (declaration) {
+                    if (declaration.kind !== 224) {
+                        return false;
+                    }
+                    var enumDeclaration = declaration;
+                    if (!enumDeclaration.members.length) {
+                        return false;
+                    }
+                    var firstEnumMember = enumDeclaration.members[0];
+                    if (!firstEnumMember.initializer) {
+                        if (seenEnumMissingInitialInitializer_1) {
+                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
+                        }
+                        else {
+                            seenEnumMissingInitialInitializer_1 = true;
+                        }
+                    }
+                });
+            }
+        }
+        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
+            var declarations = symbol.declarations;
+            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
+                var declaration = declarations_5[_i];
+                if ((declaration.kind === 221 ||
+                    (declaration.kind === 220 && ts.nodeIsPresent(declaration.body))) &&
+                    !ts.isInAmbientContext(declaration)) {
+                    return declaration;
+                }
+            }
+            return undefined;
+        }
+        function inSameLexicalScope(node1, node2) {
+            var container1 = ts.getEnclosingBlockScopeContainer(node1);
+            var container2 = ts.getEnclosingBlockScopeContainer(node2);
+            if (isGlobalSourceFile(container1)) {
+                return isGlobalSourceFile(container2);
+            }
+            else if (isGlobalSourceFile(container2)) {
+                return false;
+            }
+            else {
+                return container1 === container2;
+            }
+        }
+        function checkModuleDeclaration(node) {
+            if (produceDiagnostics) {
+                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
+                var inAmbientContext = ts.isInAmbientContext(node);
+                if (isGlobalAugmentation && !inAmbientContext) {
+                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
+                }
+                var isAmbientExternalModule = ts.isAmbientModule(node);
+                var contextErrorMessage = isAmbientExternalModule
+                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
+                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
+                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
+                    return;
+                }
+                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
+                    if (!inAmbientContext && node.name.kind === 9) {
+                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
+                    }
+                }
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                if (symbol.flags & 512
+                    && symbol.declarations.length > 1
+                    && !inAmbientContext
+                    && ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
+                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
+                    if (firstNonAmbientClassOrFunc) {
+                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
+                        }
+                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
+                        }
+                    }
+                    var mergedClass = ts.getDeclarationOfKind(symbol, 221);
+                    if (mergedClass &&
+                        inSameLexicalScope(node, mergedClass)) {
+                        getNodeLinks(node).flags |= 32768;
+                    }
+                }
+                if (isAmbientExternalModule) {
+                    if (ts.isExternalModuleAugmentation(node)) {
+                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432);
+                        if (checkBody) {
+                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
+                                var statement = _a[_i];
+                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
+                            }
+                        }
+                    }
+                    else if (isGlobalSourceFile(node.parent)) {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
+                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
+                        }
+                    }
+                    else {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else {
+                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
+                        }
+                    }
+                }
+            }
+            checkSourceElement(node.body);
+        }
+        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
+            switch (node.kind) {
+                case 200:
+                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                        var decl = _a[_i];
+                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
+                    }
+                    break;
+                case 235:
+                case 236:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
+                    break;
+                case 229:
+                case 230:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
+                    break;
+                case 169:
+                case 218:
+                    var name_19 = node.name;
+                    if (ts.isBindingPattern(name_19)) {
+                        for (var _b = 0, _c = name_19.elements; _b < _c.length; _b++) {
+                            var el = _c[_b];
+                            checkModuleAugmentationElement(el, isGlobalAugmentation);
+                        }
+                        break;
+                    }
+                case 221:
+                case 224:
+                case 220:
+                case 222:
+                case 225:
+                case 223:
+                    if (isGlobalAugmentation) {
+                        return;
+                    }
+                    var symbol = getSymbolOfNode(node);
+                    if (symbol) {
+                        var reportError = !(symbol.flags & 33554432);
+                        if (!reportError) {
+                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
+                        }
+                    }
+                    break;
+            }
+        }
+        function getFirstIdentifier(node) {
+            while (true) {
+                if (node.kind === 139) {
+                    node = node.left;
+                }
+                else if (node.kind === 172) {
+                    node = node.expression;
+                }
+                else {
+                    break;
+                }
+            }
+            ts.Debug.assert(node.kind === 69);
+            return node;
+        }
+        function checkExternalImportOrExportDeclaration(node) {
+            var moduleName = ts.getExternalModuleName(node);
+            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9) {
+                error(moduleName, ts.Diagnostics.String_literal_expected);
+                return false;
+            }
+            var inAmbientExternalModule = node.parent.kind === 226 && ts.isAmbientModule(node.parent.parent);
+            if (node.parent.kind !== 256 && !inAmbientExternalModule) {
+                error(moduleName, node.kind === 236 ?
+                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
+                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
+                return false;
+            }
+            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
+                if (!isTopLevelInExternalModuleAugmentation(node)) {
+                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkAliasSymbol(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target !== unknownSymbol) {
+                var excludedMeanings = (symbol.flags & (107455 | 1048576) ? 107455 : 0) |
+                    (symbol.flags & 793056 ? 793056 : 0) |
+                    (symbol.flags & 1536 ? 1536 : 0);
+                if (target.flags & excludedMeanings) {
+                    var message = node.kind === 238 ?
+                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
+                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
+                    error(node, message, symbolToString(symbol));
+                }
+            }
+        }
+        function checkImportBinding(node) {
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkAliasSymbol(node);
+        }
+        function checkImportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
+            }
+            if (checkExternalImportOrExportDeclaration(node)) {
+                var importClause = node.importClause;
+                if (importClause) {
+                    if (importClause.name) {
+                        checkImportBinding(importClause);
+                    }
+                    if (importClause.namedBindings) {
+                        if (importClause.namedBindings.kind === 232) {
+                            checkImportBinding(importClause.namedBindings);
+                        }
+                        else {
+                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
+                        }
+                    }
+                }
+            }
+        }
+        function checkImportEqualsDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                return;
+            }
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
+                checkImportBinding(node);
+                if (node.flags & 1) {
+                    markExportAsReferenced(node);
+                }
+                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    var target = resolveAlias(getSymbolOfNode(node));
+                    if (target !== unknownSymbol) {
+                        if (target.flags & 107455) {
+                            var moduleName = getFirstIdentifier(node.moduleReference);
+                            if (!(resolveEntityName(moduleName, 107455 | 1536).flags & 1536)) {
+                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
+                            }
+                        }
+                        if (target.flags & 793056) {
+                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
+                        }
+                    }
+                }
+                else {
+                    if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
+                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
+                    }
+                }
+            }
+        }
+        function checkExportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
+            }
+            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
+                if (node.exportClause) {
+                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
+                    var inAmbientExternalModule = node.parent.kind === 226 && ts.isAmbientModule(node.parent.parent);
+                    if (node.parent.kind !== 256 && !inAmbientExternalModule) {
+                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
+                    }
+                }
+                else {
+                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
+                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
+                    }
+                }
+            }
+        }
+        function checkGrammarModuleElementContext(node, errorMessage) {
+            if (node.parent.kind !== 256 && node.parent.kind !== 226 && node.parent.kind !== 225) {
+                return grammarErrorOnFirstToken(node, errorMessage);
+            }
+        }
+        function checkExportSpecifier(node) {
+            checkAliasSymbol(node);
+            if (!node.parent.parent.moduleSpecifier) {
+                var exportedName = node.propertyName || node.name;
+                var symbol = resolveName(exportedName, exportedName.text, 107455 | 793056 | 1536 | 8388608, undefined, undefined);
+                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
+                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
+                }
+                else {
+                    markExportAsReferenced(node);
+                }
+            }
+        }
+        function checkExportAssignment(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
+                return;
+            }
+            var container = node.parent.kind === 256 ? node.parent : node.parent.parent;
+            if (container.kind === 225 && !ts.isAmbientModule(container)) {
+                error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
+            }
+            if (node.expression.kind === 69) {
+                markExportAsReferenced(node);
+            }
+            else {
+                checkExpressionCached(node.expression);
+            }
+            checkExternalModuleExports(container);
+            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
+                if (modulekind === ts.ModuleKind.ES6) {
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
+                }
+                else if (modulekind === ts.ModuleKind.System) {
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
+                }
+            }
+        }
+        function hasExportedMembers(moduleSymbol) {
+            for (var id in moduleSymbol.exports) {
+                if (id !== "export=") {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkExternalModuleExports(node) {
+            var moduleSymbol = getSymbolOfNode(node);
+            var links = getSymbolLinks(moduleSymbol);
+            if (!links.exportsChecked) {
+                var exportEqualsSymbol = moduleSymbol.exports["export="];
+                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
+                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
+                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
+                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
+                    }
+                }
+                var exports = getExportsOfModule(moduleSymbol);
+                for (var id in exports) {
+                    if (id === "__export") {
+                        continue;
+                    }
+                    var _a = exports[id], declarations = _a.declarations, flags = _a.flags;
+                    if (flags & (1536 | 64 | 384)) {
+                        continue;
+                    }
+                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
+                    if (flags & 524288 && exportedDeclarationsCount <= 2) {
+                        continue;
+                    }
+                    if (exportedDeclarationsCount > 1) {
+                        for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
+                            var declaration = declarations_6[_i];
+                            if (isNotOverload(declaration)) {
+                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
+                            }
+                        }
+                    }
+                }
+                links.exportsChecked = true;
+            }
+            function isNotOverload(declaration) {
+                return declaration.kind !== 220 || !!declaration.body;
+            }
+        }
+        function checkSourceElement(node) {
+            if (!node) {
+                return;
+            }
+            var kind = node.kind;
+            if (cancellationToken) {
+                switch (kind) {
+                    case 225:
+                    case 221:
+                    case 222:
+                    case 220:
+                        cancellationToken.throwIfCancellationRequested();
+                }
+            }
+            switch (kind) {
+                case 141:
+                    return checkTypeParameter(node);
+                case 142:
+                    return checkParameter(node);
+                case 145:
+                case 144:
+                    return checkPropertyDeclaration(node);
+                case 156:
+                case 157:
+                case 151:
+                case 152:
+                    return checkSignatureDeclaration(node);
+                case 153:
+                    return checkSignatureDeclaration(node);
+                case 147:
+                case 146:
+                    return checkMethodDeclaration(node);
+                case 148:
+                    return checkConstructorDeclaration(node);
+                case 149:
+                case 150:
+                    return checkAccessorDeclaration(node);
+                case 155:
+                    return checkTypeReferenceNode(node);
+                case 154:
+                    return checkTypePredicate(node);
+                case 158:
+                    return checkTypeQuery(node);
+                case 159:
+                    return checkTypeLiteral(node);
+                case 160:
+                    return checkArrayType(node);
+                case 161:
+                    return checkTupleType(node);
+                case 162:
+                case 163:
+                    return checkUnionOrIntersectionType(node);
+                case 164:
+                    return checkSourceElement(node.type);
+                case 220:
+                    return checkFunctionDeclaration(node);
+                case 199:
+                case 226:
+                    return checkBlock(node);
+                case 200:
+                    return checkVariableStatement(node);
+                case 202:
+                    return checkExpressionStatement(node);
+                case 203:
+                    return checkIfStatement(node);
+                case 204:
+                    return checkDoStatement(node);
+                case 205:
+                    return checkWhileStatement(node);
+                case 206:
+                    return checkForStatement(node);
+                case 207:
+                    return checkForInStatement(node);
+                case 208:
+                    return checkForOfStatement(node);
+                case 209:
+                case 210:
+                    return checkBreakOrContinueStatement(node);
+                case 211:
+                    return checkReturnStatement(node);
+                case 212:
+                    return checkWithStatement(node);
+                case 213:
+                    return checkSwitchStatement(node);
+                case 214:
+                    return checkLabeledStatement(node);
+                case 215:
+                    return checkThrowStatement(node);
+                case 216:
+                    return checkTryStatement(node);
+                case 218:
+                    return checkVariableDeclaration(node);
+                case 169:
+                    return checkBindingElement(node);
+                case 221:
+                    return checkClassDeclaration(node);
+                case 222:
+                    return checkInterfaceDeclaration(node);
+                case 223:
+                    return checkTypeAliasDeclaration(node);
+                case 224:
+                    return checkEnumDeclaration(node);
+                case 225:
+                    return checkModuleDeclaration(node);
+                case 230:
+                    return checkImportDeclaration(node);
+                case 229:
+                    return checkImportEqualsDeclaration(node);
+                case 236:
+                    return checkExportDeclaration(node);
+                case 235:
+                    return checkExportAssignment(node);
+                case 201:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 217:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 239:
+                    return checkMissingDeclaration(node);
+            }
+        }
+        function checkNodeDeferred(node) {
+            if (deferredNodes) {
+                deferredNodes.push(node);
+            }
+        }
+        function checkDeferredNodes() {
+            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
+                var node = deferredNodes_1[_i];
+                switch (node.kind) {
+                    case 179:
+                    case 180:
+                    case 147:
+                    case 146:
+                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
+                        break;
+                    case 149:
+                    case 150:
+                        checkAccessorDeferred(node);
+                        break;
+                    case 192:
+                        checkClassExpressionDeferred(node);
+                        break;
+                }
+            }
+        }
+        function checkSourceFile(node) {
+            var start = new Date().getTime();
+            checkSourceFileWorker(node);
+            ts.checkTime += new Date().getTime() - start;
+        }
+        function checkSourceFileWorker(node) {
+            var links = getNodeLinks(node);
+            if (!(links.flags & 1)) {
+                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
+                    return;
+                }
+                checkGrammarSourceFile(node);
+                potentialThisCollisions.length = 0;
+                deferredNodes = [];
+                ts.forEach(node.statements, checkSourceElement);
+                checkDeferredNodes();
+                deferredNodes = undefined;
+                if (ts.isExternalOrCommonJsModule(node)) {
+                    checkExternalModuleExports(node);
+                }
+                if (potentialThisCollisions.length) {
+                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
+                    potentialThisCollisions.length = 0;
+                }
+                links.flags |= 1;
+            }
+        }
+        function getDiagnostics(sourceFile, ct) {
+            try {
+                cancellationToken = ct;
+                return getDiagnosticsWorker(sourceFile);
+            }
+            finally {
+                cancellationToken = undefined;
+            }
+        }
+        function getDiagnosticsWorker(sourceFile) {
+            throwIfNonDiagnosticsProducing();
+            if (sourceFile) {
+                checkSourceFile(sourceFile);
+                return diagnostics.getDiagnostics(sourceFile.fileName);
+            }
+            ts.forEach(host.getSourceFiles(), checkSourceFile);
+            return diagnostics.getDiagnostics();
+        }
+        function getGlobalDiagnostics() {
+            throwIfNonDiagnosticsProducing();
+            return diagnostics.getGlobalDiagnostics();
+        }
+        function throwIfNonDiagnosticsProducing() {
+            if (!produceDiagnostics) {
+                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
+            }
+        }
+        function isInsideWithStatementBody(node) {
+            if (node) {
+                while (node.parent) {
+                    if (node.parent.kind === 212 && node.parent.statement === node) {
+                        return true;
+                    }
+                    node = node.parent;
+                }
+            }
+            return false;
+        }
+        function getSymbolsInScope(location, meaning) {
+            var symbols = {};
+            var memberFlags = 0;
+            if (isInsideWithStatementBody(location)) {
+                return [];
+            }
+            populateSymbols();
+            return symbolsToArray(symbols);
+            function populateSymbols() {
+                while (location) {
+                    if (location.locals && !isGlobalSourceFile(location)) {
+                        copySymbols(location.locals, meaning);
+                    }
+                    switch (location.kind) {
+                        case 256:
+                            if (!ts.isExternalOrCommonJsModule(location)) {
+                                break;
+                            }
+                        case 225:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931);
+                            break;
+                        case 224:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8);
+                            break;
+                        case 192:
+                            var className = location.name;
+                            if (className) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                        case 221:
+                        case 222:
+                            if (!(memberFlags & 32)) {
+                                copySymbols(getSymbolOfNode(location).members, meaning & 793056);
+                            }
+                            break;
+                        case 179:
+                            var funcName = location.name;
+                            if (funcName) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                            break;
+                    }
+                    if (ts.introducesArgumentsExoticObject(location)) {
+                        copySymbol(argumentsSymbol, meaning);
+                    }
+                    memberFlags = location.flags;
+                    location = location.parent;
+                }
+                copySymbols(globals, meaning);
+            }
+            function copySymbol(symbol, meaning) {
+                if (symbol.flags & meaning) {
+                    var id = symbol.name;
+                    if (!ts.hasProperty(symbols, id)) {
+                        symbols[id] = symbol;
+                    }
+                }
+            }
+            function copySymbols(source, meaning) {
+                if (meaning) {
+                    for (var id in source) {
+                        var symbol = source[id];
+                        copySymbol(symbol, meaning);
+                    }
+                }
+            }
+        }
+        function isTypeDeclarationName(name) {
+            return name.kind === 69 &&
+                isTypeDeclaration(name.parent) &&
+                name.parent.name === name;
+        }
+        function isTypeDeclaration(node) {
+            switch (node.kind) {
+                case 141:
+                case 221:
+                case 222:
+                case 223:
+                case 224:
+                    return true;
+            }
+        }
+        function isTypeReferenceIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 139) {
+                node = node.parent;
+            }
+            return node.parent && (node.parent.kind === 155 || node.parent.kind === 267);
+        }
+        function isHeritageClauseElementIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 172) {
+                node = node.parent;
+            }
+            return node.parent && node.parent.kind === 194;
+        }
+        function forEachEnclosingClass(node, callback) {
+            var result;
+            while (true) {
+                node = ts.getContainingClass(node);
+                if (!node)
+                    break;
+                if (result = callback(node))
+                    break;
+            }
+            return result;
+        }
+        function isNodeWithinClass(node, classDeclaration) {
+            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
+        }
+        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
+            while (nodeOnRightSide.parent.kind === 139) {
+                nodeOnRightSide = nodeOnRightSide.parent;
+            }
+            if (nodeOnRightSide.parent.kind === 229) {
+                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            if (nodeOnRightSide.parent.kind === 235) {
+                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            return undefined;
+        }
+        function isInRightSideOfImportOrExportAssignment(node) {
+            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
+        }
+        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
+            if (ts.isDeclarationName(entityName)) {
+                return getSymbolOfNode(entityName.parent);
+            }
+            if (ts.isInJavaScriptFile(entityName) && entityName.parent.kind === 172) {
+                var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
+                switch (specialPropertyAssignmentKind) {
+                    case 1:
+                    case 3:
+                        return getSymbolOfNode(entityName.parent);
+                    case 4:
+                    case 2:
+                        return getSymbolOfNode(entityName.parent.parent);
+                    default:
+                }
+            }
+            if (entityName.parent.kind === 235) {
+                return resolveEntityName(entityName, 107455 | 793056 | 1536 | 8388608);
+            }
+            if (entityName.kind !== 172) {
+                if (isInRightSideOfImportOrExportAssignment(entityName)) {
+                    var importEqualsDeclaration = ts.getAncestor(entityName, 229);
+                    ts.Debug.assert(importEqualsDeclaration !== undefined);
+                    return getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importEqualsDeclaration, true);
+                }
+            }
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            if (isHeritageClauseElementIdentifier(entityName)) {
+                var meaning = 0;
+                if (entityName.parent.kind === 194) {
+                    meaning = 793056;
+                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                        meaning |= 107455;
+                    }
+                }
+                else {
+                    meaning = 1536;
+                }
+                meaning |= 8388608;
+                return resolveEntityName(entityName, meaning);
+            }
+            else if (ts.isExpression(entityName)) {
+                if (ts.nodeIsMissing(entityName)) {
+                    return undefined;
+                }
+                if (entityName.kind === 69) {
+                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
+                        return getIntrinsicTagSymbol(entityName.parent);
+                    }
+                    return resolveEntityName(entityName, 107455, false, true);
+                }
+                else if (entityName.kind === 172) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkPropertyAccessExpression(entityName);
+                    }
+                    return getNodeLinks(entityName).resolvedSymbol;
+                }
+                else if (entityName.kind === 139) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkQualifiedName(entityName);
+                    }
+                    return getNodeLinks(entityName).resolvedSymbol;
+                }
+            }
+            else if (isTypeReferenceIdentifier(entityName)) {
+                var meaning = (entityName.parent.kind === 155 || entityName.parent.kind === 267) ? 793056 : 1536;
+                return resolveEntityName(entityName, meaning, false, true);
+            }
+            else if (entityName.parent.kind === 246) {
+                return getJsxAttributePropertySymbol(entityName.parent);
+            }
+            if (entityName.parent.kind === 154) {
+                return resolveEntityName(entityName, 1);
+            }
+            return undefined;
+        }
+        function getSymbolAtLocation(node) {
+            if (node.kind === 256) {
+                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
+            }
+            if (isInsideWithStatementBody(node)) {
+                return undefined;
+            }
+            if (ts.isDeclarationName(node)) {
+                return getSymbolOfNode(node.parent);
+            }
+            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
+                return getSymbolOfNode(node.parent.parent);
+            }
+            if (node.kind === 69) {
+                if (isInRightSideOfImportOrExportAssignment(node)) {
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                }
+                else if (node.parent.kind === 169 &&
+                    node.parent.parent.kind === 167 &&
+                    node === node.parent.propertyName) {
+                    var typeOfPattern = getTypeOfNode(node.parent.parent);
+                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
+                    if (propertyDeclaration) {
+                        return propertyDeclaration;
+                    }
+                }
+            }
+            switch (node.kind) {
+                case 69:
+                case 172:
+                case 139:
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                case 97:
+                case 95:
+                    var type = ts.isExpression(node) ? checkExpression(node) : getTypeFromTypeNode(node);
+                    return type.symbol;
+                case 165:
+                    return getTypeFromTypeNode(node).symbol;
+                case 121:
+                    var constructorDeclaration = node.parent;
+                    if (constructorDeclaration && constructorDeclaration.kind === 148) {
+                        return constructorDeclaration.parent.symbol;
+                    }
+                    return undefined;
+                case 9:
+                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
+                        ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
+                        ((node.parent.kind === 230 || node.parent.kind === 236) &&
+                            node.parent.moduleSpecifier === node)) {
+                        return resolveExternalModuleName(node, node);
+                    }
+                case 8:
+                    if (node.parent.kind === 173 && node.parent.argumentExpression === node) {
+                        var objectType = checkExpression(node.parent.expression);
+                        if (objectType === unknownType)
+                            return undefined;
+                        var apparentType = getApparentType(objectType);
+                        if (apparentType === unknownType)
+                            return undefined;
+                        return getPropertyOfType(apparentType, node.text);
+                    }
+                    break;
+            }
+            return undefined;
+        }
+        function getShorthandAssignmentValueSymbol(location) {
+            if (location && location.kind === 254) {
+                return resolveEntityName(location.name, 107455 | 8388608);
+            }
+            return undefined;
+        }
+        function getExportSpecifierLocalTargetSymbol(node) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node) :
+                resolveEntityName(node.propertyName || node.name, 107455 | 793056 | 1536 | 8388608);
+        }
+        function getTypeOfNode(node) {
+            if (isInsideWithStatementBody(node)) {
+                return unknownType;
+            }
+            if (ts.isTypeNode(node)) {
+                return getTypeFromTypeNode(node);
+            }
+            if (ts.isExpression(node)) {
+                return getTypeOfExpression(node);
+            }
+            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
+                return getBaseTypes(getDeclaredTypeOfSymbol(getSymbolOfNode(node.parent.parent)))[0];
+            }
+            if (isTypeDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                return getDeclaredTypeOfSymbol(symbol);
+            }
+            if (isTypeDeclarationName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getDeclaredTypeOfSymbol(symbol);
+            }
+            if (ts.isDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(symbol);
+            }
+            if (ts.isDeclarationName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getTypeOfSymbol(symbol);
+            }
+            if (ts.isBindingPattern(node)) {
+                return getTypeForVariableLikeDeclaration(node.parent, true);
+            }
+            if (isInRightSideOfImportOrExportAssignment(node)) {
+                var symbol = getSymbolAtLocation(node);
+                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
+                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
+            }
+            return unknownType;
+        }
+        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
+            ts.Debug.assert(expr.kind === 171 || expr.kind === 170);
+            if (expr.parent.kind === 208) {
+                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
+            }
+            if (expr.parent.kind === 187) {
+                var iteratedType = checkExpression(expr.parent.right);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
+            }
+            if (expr.parent.kind === 253) {
+                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
+                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
+            }
+            ts.Debug.assert(expr.parent.kind === 170);
+            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
+            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, false) || unknownType;
+            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
+        }
+        function getPropertySymbolOfDestructuringAssignment(location) {
+            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
+            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
+        }
+        function getTypeOfExpression(expr) {
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
+                expr = expr.parent;
+            }
+            return checkExpression(expr);
+        }
+        function getParentTypeOfClassElement(node) {
+            var classSymbol = getSymbolOfNode(node.parent);
+            return node.flags & 32
+                ? getTypeOfSymbol(classSymbol)
+                : getDeclaredTypeOfSymbol(classSymbol);
+        }
+        function getAugmentedPropertiesOfType(type) {
+            type = getApparentType(type);
+            var propsByName = createSymbolTable(getPropertiesOfType(type));
+            if (getSignaturesOfType(type, 0).length || getSignaturesOfType(type, 1).length) {
+                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
+                    if (!ts.hasProperty(propsByName, p.name)) {
+                        propsByName[p.name] = p;
+                    }
+                });
+            }
+            return getNamedMembers(propsByName);
+        }
+        function getRootSymbols(symbol) {
+            if (symbol.flags & 268435456) {
+                var symbols_3 = [];
+                var name_20 = symbol.name;
+                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
+                    var symbol = getPropertyOfType(t, name_20);
+                    if (symbol) {
+                        symbols_3.push(symbol);
+                    }
+                });
+                return symbols_3;
+            }
+            else if (symbol.flags & 67108864) {
+                var target = void 0;
+                var next = symbol;
+                while (next = getSymbolLinks(next).target) {
+                    target = next;
+                }
+                if (target) {
+                    return [target];
+                }
+            }
+            return [symbol];
+        }
+        function isArgumentsLocalBinding(node) {
+            return getReferencedValueSymbol(node) === argumentsSymbol;
+        }
+        function moduleExportsSomeValue(moduleReferenceExpression) {
+            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
+            if (!moduleSymbol) {
+                return true;
+            }
+            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
+            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
+            var symbolLinks = getSymbolLinks(moduleSymbol);
+            if (symbolLinks.exportsSomeValue === undefined) {
+                symbolLinks.exportsSomeValue = hasExportAssignment
+                    ? !!(moduleSymbol.flags & 107455)
+                    : ts.forEachValue(getExportsOfModule(moduleSymbol), isValue);
+            }
+            return symbolLinks.exportsSomeValue;
+            function isValue(s) {
+                s = resolveSymbol(s);
+                return s && !!(s.flags & 107455);
+            }
+        }
+        function getReferencedExportContainer(node) {
+            var symbol = getReferencedValueSymbol(node);
+            if (symbol) {
+                if (symbol.flags & 1048576) {
+                    var exportSymbol = getMergedSymbol(symbol.exportSymbol);
+                    if (exportSymbol.flags & 944) {
+                        return undefined;
+                    }
+                    symbol = exportSymbol;
+                }
+                var parentSymbol = getParentOfSymbol(symbol);
+                if (parentSymbol) {
+                    if (parentSymbol.flags & 512 && parentSymbol.valueDeclaration.kind === 256) {
+                        return parentSymbol.valueDeclaration;
+                    }
+                    for (var n = node.parent; n; n = n.parent) {
+                        if ((n.kind === 225 || n.kind === 224) && getSymbolOfNode(n) === parentSymbol) {
+                            return n;
+                        }
+                    }
+                }
+            }
+        }
+        function getReferencedImportDeclaration(node) {
+            var symbol = getReferencedValueSymbol(node);
+            return symbol && symbol.flags & 8388608 ? getDeclarationOfAliasSymbol(symbol) : undefined;
+        }
+        function isSymbolOfDeclarationWithCollidingName(symbol) {
+            if (symbol.flags & 418) {
+                var links = getSymbolLinks(symbol);
+                if (links.isDeclarationWithCollidingName === undefined) {
+                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (ts.isStatementWithLocals(container)) {
+                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
+                        if (!!resolveName(container.parent, symbol.name, 107455, undefined, undefined)) {
+                            links.isDeclarationWithCollidingName = true;
+                        }
+                        else if (nodeLinks_1.flags & 131072) {
+                            var isDeclaredInLoop = nodeLinks_1.flags & 262144;
+                            var inLoopInitializer = ts.isIterationStatement(container, false);
+                            var inLoopBodyBlock = container.kind === 199 && ts.isIterationStatement(container.parent, false);
+                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
+                        }
+                        else {
+                            links.isDeclarationWithCollidingName = false;
+                        }
+                    }
+                }
+                return links.isDeclarationWithCollidingName;
+            }
+            return false;
+        }
+        function getReferencedDeclarationWithCollidingName(node) {
+            var symbol = getReferencedValueSymbol(node);
+            return symbol && isSymbolOfDeclarationWithCollidingName(symbol) ? symbol.valueDeclaration : undefined;
+        }
+        function isDeclarationWithCollidingName(node) {
+            return isSymbolOfDeclarationWithCollidingName(getSymbolOfNode(node));
+        }
+        function isValueAliasDeclaration(node) {
+            switch (node.kind) {
+                case 229:
+                case 231:
+                case 232:
+                case 234:
+                case 238:
+                    return isAliasResolvedToValue(getSymbolOfNode(node));
+                case 236:
+                    var exportClause = node.exportClause;
+                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
+                case 235:
+                    return node.expression && node.expression.kind === 69 ? isAliasResolvedToValue(getSymbolOfNode(node)) : true;
+            }
+            return false;
+        }
+        function isTopLevelValueImportEqualsWithEntityName(node) {
+            if (node.parent.kind !== 256 || !ts.isInternalModuleImportEqualsDeclaration(node)) {
+                return false;
+            }
+            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
+            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
+        }
+        function isAliasResolvedToValue(symbol) {
+            var target = resolveAlias(symbol);
+            if (target === unknownSymbol) {
+                return true;
+            }
+            return target.flags & 107455 &&
+                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
+        }
+        function isConstEnumOrConstEnumOnlyModule(s) {
+            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
+        }
+        function isReferencedAliasDeclaration(node, checkChildren) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                if (getSymbolLinks(symbol).referenced) {
+                    return true;
+                }
+            }
+            if (checkChildren) {
+                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
+            }
+            return false;
+        }
+        function isImplementationOfOverload(node) {
+            if (ts.nodeIsPresent(node.body)) {
+                var symbol = getSymbolOfNode(node);
+                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
+                return signaturesOfSymbol.length > 1 ||
+                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
+            }
+            return false;
+        }
+        function getNodeCheckFlags(node) {
+            return getNodeLinks(node).flags;
+        }
+        function getEnumMemberValue(node) {
+            computeEnumMemberValues(node.parent);
+            return getNodeLinks(node).enumMemberValue;
+        }
+        function getConstantValue(node) {
+            if (node.kind === 255) {
+                return getEnumMemberValue(node);
+            }
+            var symbol = getNodeLinks(node).resolvedSymbol;
+            if (symbol && (symbol.flags & 8)) {
+                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
+                    return getEnumMemberValue(symbol.valueDeclaration);
+                }
+            }
+            return undefined;
+        }
+        function isFunctionType(type) {
+            return type.flags & 80896 && getSignaturesOfType(type, 0).length > 0;
+        }
+        function getTypeReferenceSerializationKind(typeName) {
+            var valueSymbol = resolveEntityName(typeName, 107455, true);
+            var constructorType = valueSymbol ? getTypeOfSymbol(valueSymbol) : undefined;
+            if (constructorType && isConstructorType(constructorType)) {
+                return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
+            }
+            var typeSymbol = resolveEntityName(typeName, 793056, true);
+            if (!typeSymbol) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+            var type = getDeclaredTypeOfSymbol(typeSymbol);
+            if (type === unknownType) {
+                return ts.TypeReferenceSerializationKind.Unknown;
+            }
+            else if (type.flags & 1) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+            else if (isTypeOfKind(type, 16)) {
+                return ts.TypeReferenceSerializationKind.VoidType;
+            }
+            else if (isTypeOfKind(type, 8)) {
+                return ts.TypeReferenceSerializationKind.BooleanType;
+            }
+            else if (isTypeOfKind(type, 132)) {
+                return ts.TypeReferenceSerializationKind.NumberLikeType;
+            }
+            else if (isTypeOfKind(type, 258)) {
+                return ts.TypeReferenceSerializationKind.StringLikeType;
+            }
+            else if (isTypeOfKind(type, 8192)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            }
+            else if (isTypeOfKind(type, 16777216)) {
+                return ts.TypeReferenceSerializationKind.ESSymbolType;
+            }
+            else if (isFunctionType(type)) {
+                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
+            }
+            else if (isArrayType(type)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            }
+            else {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+        }
+        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
+            var symbol = getSymbolOfNode(declaration);
+            var type = symbol && !(symbol.flags & (2048 | 131072))
+                ? getTypeOfSymbol(symbol)
+                : unknownType;
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        }
+        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
+            var signature = getSignatureFromDeclaration(signatureDeclaration);
+            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
+        }
+        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
+            var type = getWidenedType(getTypeOfExpression(expr));
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        }
+        function writeBaseConstructorTypeOfClass(node, enclosingDeclaration, flags, writer) {
+            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(node));
+            resolveBaseTypesOfClass(classType);
+            var baseType = classType.resolvedBaseTypes.length ? classType.resolvedBaseTypes[0] : unknownType;
+            getSymbolDisplayBuilder().buildTypeDisplay(baseType, writer, enclosingDeclaration, flags);
+        }
+        function hasGlobalName(name) {
+            return ts.hasProperty(globals, name);
+        }
+        function getReferencedValueSymbol(reference) {
+            return getNodeLinks(reference).resolvedSymbol ||
+                resolveName(reference, reference.text, 107455 | 1048576 | 8388608, undefined, undefined);
+        }
+        function getReferencedValueDeclaration(reference) {
+            ts.Debug.assert(!ts.nodeIsSynthesized(reference));
+            var symbol = getReferencedValueSymbol(reference);
+            return symbol && getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
+        }
+        function createResolver() {
+            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
+            var fileToDirective;
+            if (resolvedTypeReferenceDirectives) {
+                fileToDirective = ts.createFileMap();
+                for (var key in resolvedTypeReferenceDirectives) {
+                    if (!ts.hasProperty(resolvedTypeReferenceDirectives, key)) {
+                        continue;
+                    }
+                    var resolvedDirective = resolvedTypeReferenceDirectives[key];
+                    if (!resolvedDirective) {
+                        continue;
+                    }
+                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
+                    fileToDirective.set(file.path, key);
+                }
+            }
+            return {
+                getReferencedExportContainer: getReferencedExportContainer,
+                getReferencedImportDeclaration: getReferencedImportDeclaration,
+                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
+                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
+                isValueAliasDeclaration: isValueAliasDeclaration,
+                hasGlobalName: hasGlobalName,
+                isReferencedAliasDeclaration: isReferencedAliasDeclaration,
+                getNodeCheckFlags: getNodeCheckFlags,
+                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
+                isDeclarationVisible: isDeclarationVisible,
+                isImplementationOfOverload: isImplementationOfOverload,
+                writeTypeOfDeclaration: writeTypeOfDeclaration,
+                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
+                writeTypeOfExpression: writeTypeOfExpression,
+                writeBaseConstructorTypeOfClass: writeBaseConstructorTypeOfClass,
+                isSymbolAccessible: isSymbolAccessible,
+                isEntityNameVisible: isEntityNameVisible,
+                getConstantValue: getConstantValue,
+                collectLinkedAliases: collectLinkedAliases,
+                getReferencedValueDeclaration: getReferencedValueDeclaration,
+                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
+                isOptionalParameter: isOptionalParameter,
+                moduleExportsSomeValue: moduleExportsSomeValue,
+                isArgumentsLocalBinding: isArgumentsLocalBinding,
+                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
+                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
+                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol
+            };
+            function getTypeReferenceDirectivesForEntityName(node) {
+                if (!fileToDirective) {
+                    return undefined;
+                }
+                var meaning = (node.kind === 172) || (node.kind === 69 && isInTypeQuery(node))
+                    ? 107455 | 1048576
+                    : 793056 | 1536;
+                var symbol = resolveEntityName(node, meaning, true);
+                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
+            }
+            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
+                if (!fileToDirective) {
+                    return undefined;
+                }
+                if (!isSymbolFromTypeDeclarationFile(symbol)) {
+                    return undefined;
+                }
+                var typeReferenceDirectives;
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    if (decl.symbol && decl.symbol.flags & meaning) {
+                        var file = ts.getSourceFileOfNode(decl);
+                        var typeReferenceDirective = fileToDirective.get(file.path);
+                        if (typeReferenceDirective) {
+                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
+                        }
+                    }
+                }
+                return typeReferenceDirectives;
+            }
+            function isSymbolFromTypeDeclarationFile(symbol) {
+                if (!symbol.declarations) {
+                    return false;
+                }
+                var current = symbol;
+                while (true) {
+                    var parent_12 = getParentOfSymbol(current);
+                    if (parent_12) {
+                        current = parent_12;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                if (current.valueDeclaration && current.valueDeclaration.kind === 256 && current.flags & 512) {
+                    return false;
+                }
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var file = ts.getSourceFileOfNode(decl);
+                    if (fileToDirective.contains(file.path)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+        }
+        function getExternalModuleFileFromDeclaration(declaration) {
+            var specifier = ts.getExternalModuleName(declaration);
+            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, undefined);
+            if (!moduleSymbol) {
+                return undefined;
+            }
+            return ts.getDeclarationOfKind(moduleSymbol, 256);
+        }
+        function initializeTypeChecker() {
+            ts.forEach(host.getSourceFiles(), function (file) {
+                ts.bindSourceFile(file, compilerOptions);
+            });
+            var augmentations;
+            ts.forEach(host.getSourceFiles(), function (file) {
+                if (!ts.isExternalOrCommonJsModule(file)) {
+                    mergeSymbolTable(globals, file.locals);
+                }
+                if (file.patternAmbientModules && file.patternAmbientModules.length) {
+                    patternAmbientModules = ts.concatenate(patternAmbientModules, file.patternAmbientModules);
+                }
+                if (file.moduleAugmentations.length) {
+                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
+                }
+                if (file.symbol && file.symbol.globalExports) {
+                    mergeSymbolTable(globals, file.symbol.globalExports);
+                }
+            });
+            if (augmentations) {
+                for (var _i = 0, augmentations_1 = augmentations; _i < augmentations_1.length; _i++) {
+                    var list = augmentations_1[_i];
+                    for (var _a = 0, list_2 = list; _a < list_2.length; _a++) {
+                        var augmentation = list_2[_a];
+                        mergeModuleAugmentation(augmentation);
+                    }
+                }
+            }
+            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
+            getSymbolLinks(undefinedSymbol).type = undefinedWideningType;
+            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
+            getSymbolLinks(unknownSymbol).type = unknownType;
+            globalArrayType = getGlobalType("Array", 1);
+            globalObjectType = getGlobalType("Object");
+            globalFunctionType = getGlobalType("Function");
+            globalStringType = getGlobalType("String");
+            globalNumberType = getGlobalType("Number");
+            globalBooleanType = getGlobalType("Boolean");
+            globalRegExpType = getGlobalType("RegExp");
+            jsxElementType = getExportedTypeFromNamespace("JSX", JsxNames.Element);
+            getGlobalClassDecoratorType = ts.memoize(function () { return getGlobalType("ClassDecorator"); });
+            getGlobalPropertyDecoratorType = ts.memoize(function () { return getGlobalType("PropertyDecorator"); });
+            getGlobalMethodDecoratorType = ts.memoize(function () { return getGlobalType("MethodDecorator"); });
+            getGlobalParameterDecoratorType = ts.memoize(function () { return getGlobalType("ParameterDecorator"); });
+            getGlobalTypedPropertyDescriptorType = ts.memoize(function () { return getGlobalType("TypedPropertyDescriptor", 1); });
+            getGlobalESSymbolConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Symbol"); });
+            getGlobalPromiseType = ts.memoize(function () { return getGlobalType("Promise", 1); });
+            tryGetGlobalPromiseType = ts.memoize(function () { return getGlobalSymbol("Promise", 793056, undefined) && getGlobalPromiseType(); });
+            getGlobalPromiseLikeType = ts.memoize(function () { return getGlobalType("PromiseLike", 1); });
+            getInstantiatedGlobalPromiseLikeType = ts.memoize(createInstantiatedPromiseLikeType);
+            getGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Promise"); });
+            getGlobalPromiseConstructorLikeType = ts.memoize(function () { return getGlobalType("PromiseConstructorLike"); });
+            getGlobalThenableType = ts.memoize(createThenableType);
+            getGlobalTemplateStringsArrayType = ts.memoize(function () { return getGlobalType("TemplateStringsArray"); });
+            if (languageVersion >= 2) {
+                getGlobalESSymbolType = ts.memoize(function () { return getGlobalType("Symbol"); });
+                getGlobalIterableType = ts.memoize(function () { return getGlobalType("Iterable", 1); });
+                getGlobalIteratorType = ts.memoize(function () { return getGlobalType("Iterator", 1); });
+                getGlobalIterableIteratorType = ts.memoize(function () { return getGlobalType("IterableIterator", 1); });
+            }
+            else {
+                getGlobalESSymbolType = ts.memoize(function () { return emptyObjectType; });
+                getGlobalIterableType = ts.memoize(function () { return emptyGenericType; });
+                getGlobalIteratorType = ts.memoize(function () { return emptyGenericType; });
+                getGlobalIterableIteratorType = ts.memoize(function () { return emptyGenericType; });
+            }
+            anyArrayType = createArrayType(anyType);
+            var symbol = getGlobalSymbol("ReadonlyArray", 793056, undefined);
+            globalReadonlyArrayType = symbol && getTypeOfGlobalSymbol(symbol, 1);
+            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
+        }
+        function createInstantiatedPromiseLikeType() {
+            var promiseLikeType = getGlobalPromiseLikeType();
+            if (promiseLikeType !== emptyGenericType) {
+                return createTypeReference(promiseLikeType, [anyType]);
+            }
+            return emptyObjectType;
+        }
+        function createThenableType() {
+            var thenPropertySymbol = createSymbol(67108864 | 4, "then");
+            getSymbolLinks(thenPropertySymbol).type = globalFunctionType;
+            var thenableType = createObjectType(65536);
+            thenableType.properties = [thenPropertySymbol];
+            thenableType.members = createSymbolTable(thenableType.properties);
+            thenableType.callSignatures = [];
+            thenableType.constructSignatures = [];
+            return thenableType;
+        }
+        function checkGrammarDecorators(node) {
+            if (!node.decorators) {
+                return false;
+            }
+            if (!ts.nodeCanBeDecorated(node)) {
+                if (node.kind === 147 && !ts.nodeIsPresent(node.body)) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
+                }
+                else {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
+                }
+            }
+            else if (node.kind === 149 || node.kind === 150) {
+                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
+                }
+            }
+            return false;
+        }
+        function checkGrammarModifiers(node) {
+            switch (node.kind) {
+                case 149:
+                case 150:
+                case 148:
+                case 145:
+                case 144:
+                case 147:
+                case 146:
+                case 153:
+                case 225:
+                case 230:
+                case 229:
+                case 236:
+                case 235:
+                case 179:
+                case 180:
+                case 142:
+                    break;
+                case 220:
+                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 118) &&
+                        node.parent.kind !== 226 && node.parent.kind !== 256) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                case 221:
+                case 222:
+                case 200:
+                case 223:
+                    if (node.modifiers && node.parent.kind !== 226 && node.parent.kind !== 256) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                case 224:
+                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 74) &&
+                        node.parent.kind !== 226 && node.parent.kind !== 256) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                default:
+                    return false;
+            }
+            if (!node.modifiers) {
+                return;
+            }
+            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
+            var flags = 0;
+            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
+                var modifier = _a[_i];
+                if (modifier.kind !== 128) {
+                    if (node.kind === 144 || node.kind === 146) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
+                    }
+                    if (node.kind === 153) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
+                    }
+                }
+                switch (modifier.kind) {
+                    case 74:
+                        if (node.kind !== 224 && node.parent.kind === 221) {
+                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(74));
+                        }
+                        break;
+                    case 112:
+                    case 111:
+                    case 110:
+                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
+                        if (modifier.kind === 111) {
+                            lastProtected = modifier;
+                        }
+                        else if (modifier.kind === 110) {
+                            lastPrivate = modifier;
+                        }
+                        if (flags & 28) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
+                        }
+                        else if (flags & 32) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
+                        }
+                        else if (flags & 64) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
+                        }
+                        else if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
+                        }
+                        else if (node.parent.kind === 226 || node.parent.kind === 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
+                        }
+                        else if (flags & 128) {
+                            if (modifier.kind === 110) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
+                            }
+                            else {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
+                            }
+                        }
+                        flags |= ts.modifierToFlag(modifier.kind);
+                        break;
+                    case 113:
+                        if (flags & 32) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
+                        }
+                        else if (flags & 64) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
+                        }
+                        else if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
+                        }
+                        else if (node.parent.kind === 226 || node.parent.kind === 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
+                        }
+                        else if (node.kind === 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
+                        }
+                        else if (flags & 128) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                        }
+                        flags |= 32;
+                        lastStatic = modifier;
+                        break;
+                    case 128:
+                        if (flags & 64) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
+                        }
+                        else if (node.kind !== 145 && node.kind !== 144 && node.kind !== 153 && node.kind !== 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
+                        }
+                        flags |= 64;
+                        lastReadonly = modifier;
+                        break;
+                    case 82:
+                        if (flags & 1) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
+                        }
+                        else if (flags & 2) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
+                        }
+                        else if (flags & 128) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
+                        }
+                        else if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
+                        }
+                        else if (node.parent.kind === 221) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
+                        }
+                        else if (node.kind === 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
+                        }
+                        flags |= 1;
+                        break;
+                    case 122:
+                        if (flags & 2) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
+                        }
+                        else if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.parent.kind === 221) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
+                        }
+                        else if (node.kind === 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
+                        }
+                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 226) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
+                        }
+                        flags |= 2;
+                        lastDeclare = modifier;
+                        break;
+                    case 115:
+                        if (flags & 128) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
+                        }
+                        if (node.kind !== 221) {
+                            if (node.kind !== 147 &&
+                                node.kind !== 145 &&
+                                node.kind !== 149 &&
+                                node.kind !== 150) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
+                            }
+                            if (!(node.parent.kind === 221 && node.parent.flags & 128)) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
+                            }
+                            if (flags & 32) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                            }
+                            if (flags & 8) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
+                            }
+                        }
+                        flags |= 128;
+                        break;
+                    case 118:
+                        if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
+                        }
+                        else if (flags & 2 || ts.isInAmbientContext(node.parent)) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.kind === 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
+                        }
+                        flags |= 256;
+                        lastAsync = modifier;
+                        break;
+                }
+            }
+            if (node.kind === 148) {
+                if (flags & 32) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
+                }
+                if (flags & 128) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
+                }
+                else if (flags & 256) {
+                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
+                }
+                else if (flags & 64) {
+                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
+                }
+                return;
+            }
+            else if ((node.kind === 230 || node.kind === 229) && flags & 2) {
+                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
+            }
+            else if (node.kind === 142 && (flags & 92) && ts.isBindingPattern(node.name)) {
+                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_a_binding_pattern);
+            }
+            if (flags & 256) {
+                return checkGrammarAsyncModifier(node, lastAsync);
+            }
+        }
+        function checkGrammarAsyncModifier(node, asyncModifier) {
+            if (languageVersion < 2) {
+                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
+            }
+            switch (node.kind) {
+                case 147:
+                case 220:
+                case 179:
+                case 180:
+                    if (!node.asteriskToken) {
+                        return false;
+                    }
+                    break;
+            }
+            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
+        }
+        function checkGrammarForDisallowedTrailingComma(list) {
+            if (list && list.hasTrailingComma) {
+                var start = list.end - ",".length;
+                var end = list.end;
+                var sourceFile = ts.getSourceFileOfNode(list[0]);
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
+            }
+        }
+        function checkGrammarTypeParameterList(node, typeParameters, file) {
+            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
+                return true;
+            }
+            if (typeParameters && typeParameters.length === 0) {
+                var start = typeParameters.pos - "<".length;
+                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
+                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
+            }
+        }
+        function checkGrammarParameterList(parameters) {
+            var seenOptionalParameter = false;
+            var parameterCount = parameters.length;
+            for (var i = 0; i < parameterCount; i++) {
+                var parameter = parameters[i];
+                if (parameter.dotDotDotToken) {
+                    if (i !== (parameterCount - 1)) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
+                    }
+                    if (ts.isBindingPattern(parameter.name)) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                    }
+                    if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
+                    }
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
+                    }
+                }
+                else if (parameter.questionToken) {
+                    seenOptionalParameter = true;
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
+                    }
+                }
+                else if (seenOptionalParameter && !parameter.initializer) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
+                }
+            }
+        }
+        function checkGrammarFunctionLikeDeclaration(node) {
+            var file = ts.getSourceFileOfNode(node);
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node, node.typeParameters, file) ||
+                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
+        }
+        function checkGrammarArrowFunction(node, file) {
+            if (node.kind === 180) {
+                var arrowFunction = node;
+                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
+                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
+                if (startLine !== endLine) {
+                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
+                }
+            }
+            return false;
+        }
+        function checkGrammarIndexSignatureParameters(node) {
+            var parameter = node.parameters[0];
+            if (node.parameters.length !== 1) {
+                if (parameter) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                }
+                else {
+                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                }
+            }
+            if (parameter.dotDotDotToken) {
+                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
+            }
+            if (parameter.flags & 1023) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
+            }
+            if (parameter.questionToken) {
+                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
+            }
+            if (parameter.initializer) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
+            }
+            if (!parameter.type) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
+            }
+            if (parameter.type.kind !== 132 && parameter.type.kind !== 130) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
+            }
+            if (!node.type) {
+                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
+            }
+        }
+        function checkGrammarIndexSignature(node) {
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
+        }
+        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
+            if (typeArguments && typeArguments.length === 0) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                var start = typeArguments.pos - "<".length;
+                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+            }
+        }
+        function checkGrammarTypeArguments(node, typeArguments) {
+            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
+                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
+        }
+        function checkGrammarForOmittedArgument(node, args) {
+            if (args) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                for (var _i = 0, args_1 = args; _i < args_1.length; _i++) {
+                    var arg = args_1[_i];
+                    if (arg.kind === 193) {
+                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
+                    }
+                }
+            }
+        }
+        function checkGrammarArguments(node, args) {
+            return checkGrammarForOmittedArgument(node, args);
+        }
+        function checkGrammarHeritageClause(node) {
+            var types = node.types;
+            if (checkGrammarForDisallowedTrailingComma(types)) {
+                return true;
+            }
+            if (types && types.length === 0) {
+                var listType = ts.tokenToString(node.token);
+                var sourceFile = ts.getSourceFileOfNode(node);
+                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
+            }
+        }
+        function checkGrammarClassDeclarationHeritageClauses(node) {
+            var seenExtendsClause = false;
+            var seenImplementsClause = false;
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 83) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
+                        }
+                        if (heritageClause.types.length > 1) {
+                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
+                        }
+                        seenExtendsClause = true;
+                    }
+                    else {
+                        ts.Debug.assert(heritageClause.token === 106);
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
+                        }
+                        seenImplementsClause = true;
+                    }
+                    checkGrammarHeritageClause(heritageClause);
+                }
+            }
+        }
+        function checkGrammarInterfaceDeclaration(node) {
+            var seenExtendsClause = false;
+            if (node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 83) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        seenExtendsClause = true;
+                    }
+                    else {
+                        ts.Debug.assert(heritageClause.token === 106);
+                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
+                    }
+                    checkGrammarHeritageClause(heritageClause);
+                }
+            }
+            return false;
+        }
+        function checkGrammarComputedPropertyName(node) {
+            if (node.kind !== 140) {
+                return false;
+            }
+            var computedPropertyName = node;
+            if (computedPropertyName.expression.kind === 187 && computedPropertyName.expression.operatorToken.kind === 24) {
+                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
+            }
+        }
+        function checkGrammarForGenerator(node) {
+            if (node.asteriskToken) {
+                ts.Debug.assert(node.kind === 220 ||
+                    node.kind === 179 ||
+                    node.kind === 147);
+                if (ts.isInAmbientContext(node)) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
+                }
+                if (!node.body) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
+                }
+                if (languageVersion < 2) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
+                }
+            }
+        }
+        function checkGrammarForInvalidQuestionMark(node, questionToken, message) {
+            if (questionToken) {
+                return grammarErrorOnNode(questionToken, message);
+            }
+        }
+        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
+            var seen = {};
+            var Property = 1;
+            var GetAccessor = 2;
+            var SetAccessor = 4;
+            var GetOrSetAccessor = GetAccessor | SetAccessor;
+            var _loop_1 = function(prop) {
+                var name_21 = prop.name;
+                if (prop.kind === 193 ||
+                    name_21.kind === 140) {
+                    checkGrammarComputedPropertyName(name_21);
+                }
+                if (prop.kind === 254 && !inDestructuring && prop.objectAssignmentInitializer) {
+                    return { value: grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment) };
+                }
+                ts.forEach(prop.modifiers, function (mod) {
+                    if (mod.kind !== 118 || prop.kind !== 147) {
+                        grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
+                    }
+                });
+                var currentKind = void 0;
+                if (prop.kind === 253 || prop.kind === 254) {
+                    checkGrammarForInvalidQuestionMark(prop, prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
+                    if (name_21.kind === 8) {
+                        checkGrammarNumericLiteral(name_21);
+                    }
+                    currentKind = Property;
+                }
+                else if (prop.kind === 147) {
+                    currentKind = Property;
+                }
+                else if (prop.kind === 149) {
+                    currentKind = GetAccessor;
+                }
+                else if (prop.kind === 150) {
+                    currentKind = SetAccessor;
+                }
+                else {
+                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
+                }
+                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_21);
+                if (effectiveName === undefined) {
+                    return "continue";
+                }
+                if (!ts.hasProperty(seen, effectiveName)) {
+                    seen[effectiveName] = currentKind;
+                }
+                else {
+                    var existingKind = seen[effectiveName];
+                    if (currentKind === Property && existingKind === Property) {
+                        grammarErrorOnNode(name_21, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_21));
+                    }
+                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
+                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
+                            seen[effectiveName] = currentKind | existingKind;
+                        }
+                        else {
+                            return { value: grammarErrorOnNode(name_21, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
+                        }
+                    }
+                    else {
+                        return { value: grammarErrorOnNode(name_21, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name) };
+                    }
+                }
+            };
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var prop = _a[_i];
+                var state_2 = _loop_1(prop);
+                if (typeof state_2 === "object") return state_2.value;
+            }
+        }
+        function checkGrammarJsxElement(node) {
+            var seen = {};
+            for (var _i = 0, _a = node.attributes; _i < _a.length; _i++) {
+                var attr = _a[_i];
+                if (attr.kind === 247) {
+                    continue;
+                }
+                var jsxAttr = attr;
+                var name_22 = jsxAttr.name;
+                if (!ts.hasProperty(seen, name_22.text)) {
+                    seen[name_22.text] = true;
+                }
+                else {
+                    return grammarErrorOnNode(name_22, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
+                }
+                var initializer = jsxAttr.initializer;
+                if (initializer && initializer.kind === 248 && !initializer.expression) {
+                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
+                }
+            }
+        }
+        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
+            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
+                return true;
+            }
+            if (forInOrOfStatement.initializer.kind === 219) {
+                var variableList = forInOrOfStatement.initializer;
+                if (!checkGrammarVariableDeclarationList(variableList)) {
+                    var declarations = variableList.declarations;
+                    if (!declarations.length) {
+                        return false;
+                    }
+                    if (declarations.length > 1) {
+                        var diagnostic = forInOrOfStatement.kind === 207
+                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
+                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
+                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
+                    }
+                    var firstDeclaration = declarations[0];
+                    if (firstDeclaration.initializer) {
+                        var diagnostic = forInOrOfStatement.kind === 207
+                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
+                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
+                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
+                    }
+                    if (firstDeclaration.type) {
+                        var diagnostic = forInOrOfStatement.kind === 207
+                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
+                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
+                        return grammarErrorOnNode(firstDeclaration, diagnostic);
+                    }
+                }
+            }
+            return false;
+        }
+        function checkGrammarAccessor(accessor) {
+            var kind = accessor.kind;
+            if (languageVersion < 1) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
+            }
+            else if (ts.isInAmbientContext(accessor)) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
+            }
+            else if (accessor.body === undefined && !(accessor.flags & 128)) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+            }
+            else if (accessor.typeParameters) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
+            }
+            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
+                return grammarErrorOnNode(accessor.name, kind === 149 ?
+                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
+                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
+            }
+            else if (kind === 150) {
+                if (accessor.type) {
+                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
+                }
+                else {
+                    var parameter = accessor.parameters[0];
+                    if (parameter.dotDotDotToken) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
+                    }
+                    else if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
+                    }
+                    else if (parameter.initializer) {
+                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
+                    }
+                }
+            }
+        }
+        function doesAccessorHaveCorrectParameterCount(accessor) {
+            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 149 ? 0 : 1);
+        }
+        function getAccessorThisParameter(accessor) {
+            if (accessor.parameters.length === (accessor.kind === 149 ? 1 : 2) &&
+                accessor.parameters[0].name.kind === 69 &&
+                accessor.parameters[0].name.originalKeywordKind === 97) {
+                return accessor.parameters[0];
+            }
+        }
+        function getFunctionLikeThisParameter(func) {
+            if (func.parameters.length &&
+                func.parameters[0].name.kind === 69 &&
+                func.parameters[0].name.originalKeywordKind === 97) {
+                return func.parameters[0];
+            }
+        }
+        function checkGrammarForNonSymbolComputedProperty(node, message) {
+            if (ts.isDynamicName(node)) {
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarMethod(node) {
+            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
+                checkGrammarFunctionLikeDeclaration(node) ||
+                checkGrammarForGenerator(node)) {
+                return true;
+            }
+            if (node.parent.kind === 171) {
+                if (checkGrammarForInvalidQuestionMark(node, node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
+                    return true;
+                }
+                else if (node.body === undefined) {
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+                }
+            }
+            if (ts.isClassLike(node.parent)) {
+                if (ts.isInAmbientContext(node)) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
+                }
+                else if (!node.body) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
+                }
+            }
+            else if (node.parent.kind === 222) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
+            }
+            else if (node.parent.kind === 159) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
+            }
+        }
+        function checkGrammarBreakOrContinueStatement(node) {
+            var current = node;
+            while (current) {
+                if (ts.isFunctionLike(current)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
+                }
+                switch (current.kind) {
+                    case 214:
+                        if (node.label && current.label.text === node.label.text) {
+                            var isMisplacedContinueLabel = node.kind === 209
+                                && !ts.isIterationStatement(current.statement, true);
+                            if (isMisplacedContinueLabel) {
+                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
+                            }
+                            return false;
+                        }
+                        break;
+                    case 213:
+                        if (node.kind === 210 && !node.label) {
+                            return false;
+                        }
+                        break;
+                    default:
+                        if (ts.isIterationStatement(current, false) && !node.label) {
+                            return false;
+                        }
+                        break;
+                }
+                current = current.parent;
+            }
+            if (node.label) {
+                var message = node.kind === 210
+                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+            else {
+                var message = node.kind === 210
+                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarBindingElement(node) {
+            if (node.dotDotDotToken) {
+                var elements = node.parent.elements;
+                if (node !== ts.lastOrUndefined(elements)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                }
+                if (node.name.kind === 168 || node.name.kind === 167) {
+                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                }
+                if (node.initializer) {
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                }
+            }
+        }
+        function checkGrammarVariableDeclaration(node) {
+            if (node.parent.parent.kind !== 207 && node.parent.parent.kind !== 208) {
+                if (ts.isInAmbientContext(node)) {
+                    if (node.initializer) {
+                        var equalsTokenLength = "=".length;
+                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+                    }
+                }
+                else if (!node.initializer) {
+                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
+                    }
+                    if (ts.isConst(node)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
+                    }
+                }
+            }
+            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
+            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
+        }
+        function checkGrammarNameInLetOrConstDeclarations(name) {
+            if (name.kind === 69) {
+                if (name.originalKeywordKind === 108) {
+                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
+                }
+            }
+            else {
+                var elements = name.elements;
+                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
+                    var element = elements_2[_i];
+                    if (element.kind !== 193) {
+                        checkGrammarNameInLetOrConstDeclarations(element.name);
+                    }
+                }
+            }
+        }
+        function checkGrammarVariableDeclarationList(declarationList) {
+            var declarations = declarationList.declarations;
+            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
+                return true;
+            }
+            if (!declarationList.declarations.length) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
+            }
+        }
+        function allowLetAndConstDeclarations(parent) {
+            switch (parent.kind) {
+                case 203:
+                case 204:
+                case 205:
+                case 212:
+                case 206:
+                case 207:
+                case 208:
+                    return false;
+                case 214:
+                    return allowLetAndConstDeclarations(parent.parent);
+            }
+            return true;
+        }
+        function checkGrammarForDisallowedLetOrConstStatement(node) {
+            if (!allowLetAndConstDeclarations(node.parent)) {
+                if (ts.isLet(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
+                }
+                else if (ts.isConst(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
+                }
+            }
+        }
+        function hasParseDiagnostics(sourceFile) {
+            return sourceFile.parseDiagnostics.length > 0;
+        }
+        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function checkGrammarConstructorTypeParameters(node) {
+            if (node.typeParameters) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarConstructorTypeAnnotation(node) {
+            if (node.type) {
+                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarProperty(node) {
+            if (ts.isClassLike(node.parent)) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+            }
+            else if (node.parent.kind === 222) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
+                }
+            }
+            else if (node.parent.kind === 159) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
+                }
+            }
+            if (ts.isInAmbientContext(node) && node.initializer) {
+                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+            }
+        }
+        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
+            if (node.kind === 222 ||
+                node.kind === 223 ||
+                node.kind === 230 ||
+                node.kind === 229 ||
+                node.kind === 236 ||
+                node.kind === 235 ||
+                (node.flags & 2) ||
+                (node.flags & (1 | 512))) {
+                return false;
+            }
+            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
+        }
+        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (ts.isDeclaration(decl) || decl.kind === 200) {
+                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
+                        return true;
+                    }
+                }
+            }
+        }
+        function checkGrammarSourceFile(node) {
+            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
+        }
+        function checkGrammarStatementInAmbientContext(node) {
+            if (ts.isInAmbientContext(node)) {
+                if (isAccessor(node.parent.kind)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
+                }
+                var links = getNodeLinks(node);
+                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
+                }
+                if (node.parent.kind === 199 || node.parent.kind === 226 || node.parent.kind === 256) {
+                    var links_1 = getNodeLinks(node.parent);
+                    if (!links_1.hasReportedStatementInAmbientContext) {
+                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
+                    }
+                }
+                else {
+                }
+            }
+        }
+        function checkGrammarNumericLiteral(node) {
+            if (node.isOctalLiteral && languageVersion >= 1) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
+            }
+        }
+        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span), 0, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        var _a;
+    }
+    ts.createTypeChecker = createTypeChecker;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var nullSourceMapWriter;
+    var defaultLastEncodedSourceMapSpan = {
+        emittedLine: 1,
+        emittedColumn: 1,
+        sourceLine: 1,
+        sourceColumn: 1,
+        sourceIndex: 0
+    };
+    function getNullSourceMapWriter() {
+        if (nullSourceMapWriter === undefined) {
+            nullSourceMapWriter = {
+                getSourceMapData: function () { return undefined; },
+                setSourceFile: function (sourceFile) { },
+                emitStart: function (range) { },
+                emitEnd: function (range, stopOverridingSpan) { },
+                emitPos: function (pos) { },
+                changeEmitSourcePos: function () { },
+                getText: function () { return undefined; },
+                getSourceMappingURL: function () { return undefined; },
+                initialize: function (filePath, sourceMapFilePath, sourceFiles, isBundledEmit) { },
+                reset: function () { }
+            };
+        }
+        return nullSourceMapWriter;
+    }
+    ts.getNullSourceMapWriter = getNullSourceMapWriter;
+    function createSourceMapWriter(host, writer) {
+        var compilerOptions = host.getCompilerOptions();
+        var currentSourceFile;
+        var sourceMapDir;
+        var stopOverridingSpan = false;
+        var modifyLastSourcePos = false;
+        var sourceMapSourceIndex;
+        var lastRecordedSourceMapSpan;
+        var lastEncodedSourceMapSpan;
+        var lastEncodedNameIndex;
+        var sourceMapData;
+        return {
+            getSourceMapData: function () { return sourceMapData; },
+            setSourceFile: setSourceFile,
+            emitPos: emitPos,
+            emitStart: emitStart,
+            emitEnd: emitEnd,
+            changeEmitSourcePos: changeEmitSourcePos,
+            getText: getText,
+            getSourceMappingURL: getSourceMappingURL,
+            initialize: initialize,
+            reset: reset
+        };
+        function initialize(filePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
+            if (sourceMapData) {
+                reset();
+            }
+            currentSourceFile = undefined;
+            sourceMapSourceIndex = -1;
+            lastRecordedSourceMapSpan = undefined;
+            lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
+            lastEncodedNameIndex = 0;
+            sourceMapData = {
+                sourceMapFilePath: sourceMapFilePath,
+                jsSourceMappingURL: !compilerOptions.inlineSourceMap ? ts.getBaseFileName(ts.normalizeSlashes(sourceMapFilePath)) : undefined,
+                sourceMapFile: ts.getBaseFileName(ts.normalizeSlashes(filePath)),
+                sourceMapSourceRoot: compilerOptions.sourceRoot || "",
+                sourceMapSources: [],
+                inputSourceFileNames: [],
+                sourceMapNames: [],
+                sourceMapMappings: "",
+                sourceMapSourcesContent: compilerOptions.inlineSources ? [] : undefined,
+                sourceMapDecodedMappings: []
+            };
+            sourceMapData.sourceMapSourceRoot = ts.normalizeSlashes(sourceMapData.sourceMapSourceRoot);
+            if (sourceMapData.sourceMapSourceRoot.length && sourceMapData.sourceMapSourceRoot.charCodeAt(sourceMapData.sourceMapSourceRoot.length - 1) !== 47) {
+                sourceMapData.sourceMapSourceRoot += ts.directorySeparator;
+            }
+            if (compilerOptions.mapRoot) {
+                sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
+                if (!isBundledEmit) {
+                    ts.Debug.assert(sourceFiles.length === 1);
+                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFiles[0], host, sourceMapDir));
+                }
+                if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
+                    sourceMapDir = ts.combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
+                    sourceMapData.jsSourceMappingURL = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizePath(filePath)), ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), host.getCurrentDirectory(), host.getCanonicalFileName, true);
+                }
+                else {
+                    sourceMapData.jsSourceMappingURL = ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL);
+                }
+            }
+            else {
+                sourceMapDir = ts.getDirectoryPath(ts.normalizePath(filePath));
+            }
+        }
+        function reset() {
+            currentSourceFile = undefined;
+            sourceMapDir = undefined;
+            sourceMapSourceIndex = undefined;
+            lastRecordedSourceMapSpan = undefined;
+            lastEncodedSourceMapSpan = undefined;
+            lastEncodedNameIndex = undefined;
+            sourceMapData = undefined;
+        }
+        function updateLastEncodedAndRecordedSpans() {
+            if (modifyLastSourcePos) {
+                modifyLastSourcePos = false;
+                lastRecordedSourceMapSpan.emittedLine = lastEncodedSourceMapSpan.emittedLine;
+                lastRecordedSourceMapSpan.emittedColumn = lastEncodedSourceMapSpan.emittedColumn;
+                sourceMapData.sourceMapDecodedMappings.pop();
+                lastEncodedSourceMapSpan = sourceMapData.sourceMapDecodedMappings.length ?
+                    sourceMapData.sourceMapDecodedMappings[sourceMapData.sourceMapDecodedMappings.length - 1] :
+                    defaultLastEncodedSourceMapSpan;
+                var sourceMapMappings = sourceMapData.sourceMapMappings;
+                var lenthToSet = sourceMapMappings.length - 1;
+                for (; lenthToSet >= 0; lenthToSet--) {
+                    var currentChar = sourceMapMappings.charAt(lenthToSet);
+                    if (currentChar === ",") {
+                        break;
+                    }
+                    if (currentChar === ";" && lenthToSet !== 0 && sourceMapMappings.charAt(lenthToSet - 1) !== ";") {
+                        break;
+                    }
+                }
+                sourceMapData.sourceMapMappings = sourceMapMappings.substr(0, Math.max(0, lenthToSet));
+            }
+        }
+        function encodeLastRecordedSourceMapSpan() {
+            if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) {
+                return;
+            }
+            var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn;
+            if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) {
+                if (sourceMapData.sourceMapMappings) {
+                    sourceMapData.sourceMapMappings += ",";
+                }
+            }
+            else {
+                for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) {
+                    sourceMapData.sourceMapMappings += ";";
+                }
+                prevEncodedEmittedColumn = 1;
+            }
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn);
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex);
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine);
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn);
+            if (lastRecordedSourceMapSpan.nameIndex >= 0) {
+                ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this");
+                sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex);
+                lastEncodedNameIndex = lastRecordedSourceMapSpan.nameIndex;
+            }
+            lastEncodedSourceMapSpan = lastRecordedSourceMapSpan;
+            sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan);
+        }
+        function emitPos(pos) {
+            if (pos === -1) {
+                return;
+            }
+            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSourceFile, pos);
+            sourceLinePos.line++;
+            sourceLinePos.character++;
+            var emittedLine = writer.getLine();
+            var emittedColumn = writer.getColumn();
+            if (!lastRecordedSourceMapSpan ||
+                lastRecordedSourceMapSpan.emittedLine !== emittedLine ||
+                lastRecordedSourceMapSpan.emittedColumn !== emittedColumn ||
+                (lastRecordedSourceMapSpan.sourceIndex === sourceMapSourceIndex &&
+                    (lastRecordedSourceMapSpan.sourceLine > sourceLinePos.line ||
+                        (lastRecordedSourceMapSpan.sourceLine === sourceLinePos.line && lastRecordedSourceMapSpan.sourceColumn > sourceLinePos.character)))) {
+                encodeLastRecordedSourceMapSpan();
+                lastRecordedSourceMapSpan = {
+                    emittedLine: emittedLine,
+                    emittedColumn: emittedColumn,
+                    sourceLine: sourceLinePos.line,
+                    sourceColumn: sourceLinePos.character,
+                    sourceIndex: sourceMapSourceIndex
+                };
+                stopOverridingSpan = false;
+            }
+            else if (!stopOverridingSpan) {
+                lastRecordedSourceMapSpan.sourceLine = sourceLinePos.line;
+                lastRecordedSourceMapSpan.sourceColumn = sourceLinePos.character;
+                lastRecordedSourceMapSpan.sourceIndex = sourceMapSourceIndex;
+            }
+            updateLastEncodedAndRecordedSpans();
+        }
+        function getStartPos(range) {
+            var rangeHasDecorators = !!range.decorators;
+            return range.pos !== -1 ? ts.skipTrivia(currentSourceFile.text, rangeHasDecorators ? range.decorators.end : range.pos) : -1;
+        }
+        function emitStart(range) {
+            emitPos(getStartPos(range));
+        }
+        function emitEnd(range, stopOverridingEnd) {
+            emitPos(range.end);
+            stopOverridingSpan = stopOverridingEnd;
+        }
+        function changeEmitSourcePos() {
+            ts.Debug.assert(!modifyLastSourcePos);
+            modifyLastSourcePos = true;
+        }
+        function setSourceFile(sourceFile) {
+            currentSourceFile = sourceFile;
+            var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
+            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSourceFile.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, true);
+            sourceMapSourceIndex = ts.indexOf(sourceMapData.sourceMapSources, source);
+            if (sourceMapSourceIndex === -1) {
+                sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
+                sourceMapData.sourceMapSources.push(source);
+                sourceMapData.inputSourceFileNames.push(sourceFile.fileName);
+                if (compilerOptions.inlineSources) {
+                    sourceMapData.sourceMapSourcesContent.push(sourceFile.text);
+                }
+            }
+        }
+        function getText() {
+            encodeLastRecordedSourceMapSpan();
+            return ts.stringify({
+                version: 3,
+                file: sourceMapData.sourceMapFile,
+                sourceRoot: sourceMapData.sourceMapSourceRoot,
+                sources: sourceMapData.sourceMapSources,
+                names: sourceMapData.sourceMapNames,
+                mappings: sourceMapData.sourceMapMappings,
+                sourcesContent: sourceMapData.sourceMapSourcesContent
+            });
+        }
+        function getSourceMappingURL() {
+            if (compilerOptions.inlineSourceMap) {
+                var base64SourceMapText = ts.convertToBase64(getText());
+                return sourceMapData.jsSourceMappingURL = "data:application/json;base64," + base64SourceMapText;
+            }
+            else {
+                return sourceMapData.jsSourceMappingURL;
+            }
+        }
+    }
+    ts.createSourceMapWriter = createSourceMapWriter;
+    var base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    function base64FormatEncode(inValue) {
+        if (inValue < 64) {
+            return base64Chars.charAt(inValue);
+        }
+        throw TypeError(inValue + ": not a 64 based value");
+    }
+    function base64VLQFormatEncode(inValue) {
+        if (inValue < 0) {
+            inValue = ((-inValue) << 1) + 1;
+        }
+        else {
+            inValue = inValue << 1;
+        }
+        var encodedStr = "";
+        do {
+            var currentDigit = inValue & 31;
+            inValue = inValue >> 5;
+            if (inValue > 0) {
+                currentDigit = currentDigit | 32;
+            }
+            encodedStr = encodedStr + base64FormatEncode(currentDigit);
+        } while (inValue > 0);
+        return encodedStr;
+    }
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
+        var declarationDiagnostics = ts.createDiagnosticCollection();
+        ts.forEachExpectedEmitFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
+        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
+        function getDeclarationDiagnosticsFromFile(_a, sources, isBundledEmit) {
+            var declarationFilePath = _a.declarationFilePath;
+            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sources, isBundledEmit);
+        }
+    }
+    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
+    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit) {
+        var newLine = host.getNewLine();
+        var compilerOptions = host.getCompilerOptions();
+        var write;
+        var writeLine;
+        var increaseIndent;
+        var decreaseIndent;
+        var writeTextOfNode;
+        var writer;
+        createAndSetNewTextWriterWithSymbolWriter();
+        var enclosingDeclaration;
+        var resultHasExternalModuleIndicator;
+        var currentText;
+        var currentLineMap;
+        var currentIdentifiers;
+        var isCurrentFileExternalModule;
+        var reportedDeclarationError = false;
+        var errorNameNode;
+        var emitJsDocComments = compilerOptions.removeComments ? function (declaration) { } : writeJsDocComments;
+        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
+        var noDeclare;
+        var moduleElementDeclarationEmitInfo = [];
+        var asynchronousSubModuleDeclarationEmitInfo;
+        var referencesOutput = "";
+        var usedTypeDirectiveReferences;
+        var emittedReferencedFiles = [];
+        var addedGlobalFileReference = false;
+        var allSourcesModuleElementDeclarationEmitInfo = [];
+        ts.forEach(sourceFiles, function (sourceFile) {
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                return;
+            }
+            if (!compilerOptions.noResolve) {
+                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
+                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
+                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
+                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference)) {
+                            addedGlobalFileReference = true;
+                        }
+                        emittedReferencedFiles.push(referencedFile);
+                    }
+                });
+            }
+            resultHasExternalModuleIndicator = false;
+            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
+                noDeclare = false;
+                emitSourceFile(sourceFile);
+            }
+            else if (ts.isExternalModule(sourceFile)) {
+                noDeclare = true;
+                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
+                writeLine();
+                increaseIndent();
+                emitSourceFile(sourceFile);
+                decreaseIndent();
+                write("}");
+                writeLine();
+            }
+            if (moduleElementDeclarationEmitInfo.length) {
+                var oldWriter = writer;
+                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
+                        ts.Debug.assert(aliasEmitInfo.node.kind === 230);
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            increaseIndent();
+                        }
+                        writeImportDeclaration(aliasEmitInfo.node);
+                        aliasEmitInfo.asynchronousOutput = writer.getText();
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            decreaseIndent();
+                        }
+                    }
+                });
+                setWriter(oldWriter);
+                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
+                moduleElementDeclarationEmitInfo = [];
+            }
+            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
+                write("export {};");
+                writeLine();
+            }
+        });
+        if (usedTypeDirectiveReferences) {
+            for (var directive in usedTypeDirectiveReferences) {
+                if (ts.hasProperty(usedTypeDirectiveReferences, directive)) {
+                    referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
+                }
+            }
+        }
+        return {
+            reportedDeclarationError: reportedDeclarationError,
+            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
+            synchronousDeclarationOutput: writer.getText(),
+            referencesOutput: referencesOutput
+        };
+        function hasInternalAnnotation(range) {
+            var comment = currentText.substring(range.pos, range.end);
+            return comment.indexOf("@internal") >= 0;
+        }
+        function stripInternal(node) {
+            if (node) {
+                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
+                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
+                    return;
+                }
+                emitNode(node);
+            }
+        }
+        function createAndSetNewTextWriterWithSymbolWriter() {
+            var writer = ts.createTextWriter(newLine);
+            writer.trackSymbol = trackSymbol;
+            writer.reportInaccessibleThisError = reportInaccessibleThisError;
+            writer.writeKeyword = writer.write;
+            writer.writeOperator = writer.write;
+            writer.writePunctuation = writer.write;
+            writer.writeSpace = writer.write;
+            writer.writeStringLiteral = writer.writeLiteral;
+            writer.writeParameter = writer.write;
+            writer.writeSymbol = writer.write;
+            setWriter(writer);
+        }
+        function setWriter(newWriter) {
+            writer = newWriter;
+            write = newWriter.write;
+            writeTextOfNode = newWriter.writeTextOfNode;
+            writeLine = newWriter.writeLine;
+            increaseIndent = newWriter.increaseIndent;
+            decreaseIndent = newWriter.decreaseIndent;
+        }
+        function writeAsynchronousModuleElements(nodes) {
+            var oldWriter = writer;
+            ts.forEach(nodes, function (declaration) {
+                var nodeToCheck;
+                if (declaration.kind === 218) {
+                    nodeToCheck = declaration.parent.parent;
+                }
+                else if (declaration.kind === 233 || declaration.kind === 234 || declaration.kind === 231) {
+                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
+                }
+                else {
+                    nodeToCheck = declaration;
+                }
+                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
+                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
+                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
+                }
+                if (moduleElementEmitInfo) {
+                    if (moduleElementEmitInfo.node.kind === 230) {
+                        moduleElementEmitInfo.isVisible = true;
+                    }
+                    else {
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
+                            increaseIndent();
+                        }
+                        if (nodeToCheck.kind === 225) {
+                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
+                            asynchronousSubModuleDeclarationEmitInfo = [];
+                        }
+                        writeModuleElement(nodeToCheck);
+                        if (nodeToCheck.kind === 225) {
+                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
+                            asynchronousSubModuleDeclarationEmitInfo = undefined;
+                        }
+                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
+                    }
+                }
+            });
+            setWriter(oldWriter);
+        }
+        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
+            if (!typeReferenceDirectives) {
+                return;
+            }
+            if (!usedTypeDirectiveReferences) {
+                usedTypeDirectiveReferences = {};
+            }
+            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
+                var directive = typeReferenceDirectives_1[_i];
+                if (!ts.hasProperty(usedTypeDirectiveReferences, directive)) {
+                    usedTypeDirectiveReferences[directive] = directive;
+                }
+            }
+        }
+        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
+            if (symbolAccessibilityResult.accessibility === 0) {
+                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
+                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
+                }
+            }
+            else {
+                reportedDeclarationError = true;
+                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
+                if (errorInfo) {
+                    if (errorInfo.typeName) {
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
+                    }
+                    else {
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
+                    }
+                }
+            }
+        }
+        function trackSymbol(symbol, enclosingDeclaration, meaning) {
+            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning));
+            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
+        }
+        function reportInaccessibleThisError() {
+            if (errorNameNode) {
+                reportedDeclarationError = true;
+                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
+            }
+        }
+        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            if (type) {
+                emitType(type);
+            }
+            else {
+                errorNameNode = declaration.name;
+                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, 2, writer);
+                errorNameNode = undefined;
+            }
+        }
+        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            if (signature.type) {
+                emitType(signature.type);
+            }
+            else {
+                errorNameNode = signature.name;
+                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 2, writer);
+                errorNameNode = undefined;
+            }
+        }
+        function emitLines(nodes) {
+            for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
+                var node = nodes_2[_i];
+                emit(node);
+            }
+        }
+        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
+            var currentWriterPos = writer.getTextPos();
+            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
+                var node = nodes_3[_i];
+                if (!canEmitFn || canEmitFn(node)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        write(separator);
+                    }
+                    currentWriterPos = writer.getTextPos();
+                    eachNodeEmitFn(node);
+                }
+            }
+        }
+        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
+            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
+        }
+        function writeJsDocComments(declaration) {
+            if (declaration) {
+                var jsDocComments = ts.getJsDocCommentsFromText(declaration, currentText);
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
+                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, true, newLine, ts.writeCommentRange);
+            }
+        }
+        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            emitType(type);
+        }
+        function emitType(type) {
+            switch (type.kind) {
+                case 117:
+                case 132:
+                case 130:
+                case 120:
+                case 133:
+                case 103:
+                case 135:
+                case 93:
+                case 127:
+                case 165:
+                case 166:
+                    return writeTextOfNode(currentText, type);
+                case 194:
+                    return emitExpressionWithTypeArguments(type);
+                case 155:
+                    return emitTypeReference(type);
+                case 158:
+                    return emitTypeQuery(type);
+                case 160:
+                    return emitArrayType(type);
+                case 161:
+                    return emitTupleType(type);
+                case 162:
+                    return emitUnionType(type);
+                case 163:
+                    return emitIntersectionType(type);
+                case 164:
+                    return emitParenType(type);
+                case 156:
+                case 157:
+                    return emitSignatureDeclarationWithJsDocComments(type);
+                case 159:
+                    return emitTypeLiteral(type);
+                case 69:
+                    return emitEntityName(type);
+                case 139:
+                    return emitEntityName(type);
+                case 154:
+                    return emitTypePredicate(type);
+            }
+            function writeEntityName(entityName) {
+                if (entityName.kind === 69) {
+                    writeTextOfNode(currentText, entityName);
+                }
+                else {
+                    var left = entityName.kind === 139 ? entityName.left : entityName.expression;
+                    var right = entityName.kind === 139 ? entityName.right : entityName.name;
+                    writeEntityName(left);
+                    write(".");
+                    writeTextOfNode(currentText, right);
+                }
+            }
+            function emitEntityName(entityName) {
+                var visibilityResult = resolver.isEntityNameVisible(entityName, entityName.parent.kind === 229 ? entityName.parent : enclosingDeclaration);
+                handleSymbolAccessibilityError(visibilityResult);
+                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
+                writeEntityName(entityName);
+            }
+            function emitExpressionWithTypeArguments(node) {
+                if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                    ts.Debug.assert(node.expression.kind === 69 || node.expression.kind === 172);
+                    emitEntityName(node.expression);
+                    if (node.typeArguments) {
+                        write("<");
+                        emitCommaList(node.typeArguments, emitType);
+                        write(">");
+                    }
+                }
+            }
+            function emitTypeReference(type) {
+                emitEntityName(type.typeName);
+                if (type.typeArguments) {
+                    write("<");
+                    emitCommaList(type.typeArguments, emitType);
+                    write(">");
+                }
+            }
+            function emitTypePredicate(type) {
+                writeTextOfNode(currentText, type.parameterName);
+                write(" is ");
+                emitType(type.type);
+            }
+            function emitTypeQuery(type) {
+                write("typeof ");
+                emitEntityName(type.exprName);
+            }
+            function emitArrayType(type) {
+                emitType(type.elementType);
+                write("[]");
+            }
+            function emitTupleType(type) {
+                write("[");
+                emitCommaList(type.elementTypes, emitType);
+                write("]");
+            }
+            function emitUnionType(type) {
+                emitSeparatedList(type.types, " | ", emitType);
+            }
+            function emitIntersectionType(type) {
+                emitSeparatedList(type.types, " & ", emitType);
+            }
+            function emitParenType(type) {
+                write("(");
+                emitType(type.type);
+                write(")");
+            }
+            function emitTypeLiteral(type) {
+                write("{");
+                if (type.members.length) {
+                    writeLine();
+                    increaseIndent();
+                    emitLines(type.members);
+                    decreaseIndent();
+                }
+                write("}");
+            }
+        }
+        function emitSourceFile(node) {
+            currentText = node.text;
+            currentLineMap = ts.getLineStarts(node);
+            currentIdentifiers = node.identifiers;
+            isCurrentFileExternalModule = ts.isExternalModule(node);
+            enclosingDeclaration = node;
+            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, true);
+            emitLines(node.statements);
+        }
+        function getExportDefaultTempVariableName() {
+            var baseName = "_default";
+            if (!ts.hasProperty(currentIdentifiers, baseName)) {
+                return baseName;
+            }
+            var count = 0;
+            while (true) {
+                count++;
+                var name_23 = baseName + "_" + count;
+                if (!ts.hasProperty(currentIdentifiers, name_23)) {
+                    return name_23;
+                }
+            }
+        }
+        function emitExportAssignment(node) {
+            if (node.expression.kind === 69) {
+                write(node.isExportEquals ? "export = " : "export default ");
+                writeTextOfNode(currentText, node.expression);
+            }
+            else {
+                var tempVarName = getExportDefaultTempVariableName();
+                if (!noDeclare) {
+                    write("declare ");
+                }
+                write("var ");
+                write(tempVarName);
+                write(": ");
+                writer.getSymbolAccessibilityDiagnostic = getDefaultExportAccessibilityDiagnostic;
+                resolver.writeTypeOfExpression(node.expression, enclosingDeclaration, 2, writer);
+                write(";");
+                writeLine();
+                write(node.isExportEquals ? "export = " : "export default ");
+                write(tempVarName);
+            }
+            write(";");
+            writeLine();
+            if (node.expression.kind === 69) {
+                var nodes = resolver.collectLinkedAliases(node.expression);
+                writeAsynchronousModuleElements(nodes);
+            }
+            function getDefaultExportAccessibilityDiagnostic(diagnostic) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
+                    errorNode: node
+                };
+            }
+        }
+        function isModuleElementVisible(node) {
+            return resolver.isDeclarationVisible(node);
+        }
+        function emitModuleElement(node, isModuleElementVisible) {
+            if (isModuleElementVisible) {
+                writeModuleElement(node);
+            }
+            else if (node.kind === 229 ||
+                (node.parent.kind === 256 && isCurrentFileExternalModule)) {
+                var isVisible = void 0;
+                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 256) {
+                    asynchronousSubModuleDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
+                else {
+                    if (node.kind === 230) {
+                        var importDeclaration = node;
+                        if (importDeclaration.importClause) {
+                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
+                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
+                        }
+                    }
+                    moduleElementDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
+            }
+        }
+        function writeModuleElement(node) {
+            switch (node.kind) {
+                case 220:
+                    return writeFunctionDeclaration(node);
+                case 200:
+                    return writeVariableStatement(node);
+                case 222:
+                    return writeInterfaceDeclaration(node);
+                case 221:
+                    return writeClassDeclaration(node);
+                case 223:
+                    return writeTypeAliasDeclaration(node);
+                case 224:
+                    return writeEnumDeclaration(node);
+                case 225:
+                    return writeModuleDeclaration(node);
+                case 229:
+                    return writeImportEqualsDeclaration(node);
+                case 230:
+                    return writeImportDeclaration(node);
+                default:
+                    ts.Debug.fail("Unknown symbol kind");
+            }
+        }
+        function emitModuleElementDeclarationFlags(node) {
+            if (node.parent.kind === 256) {
+                if (node.flags & 1) {
+                    write("export ");
+                }
+                if (node.flags & 512) {
+                    write("default ");
+                }
+                else if (node.kind !== 222 && !noDeclare) {
+                    write("declare ");
+                }
+            }
+        }
+        function emitClassMemberDeclarationFlags(flags) {
+            if (flags & 8) {
+                write("private ");
+            }
+            else if (flags & 16) {
+                write("protected ");
+            }
+            if (flags & 32) {
+                write("static ");
+            }
+            if (flags & 64) {
+                write("readonly ");
+            }
+            if (flags & 128) {
+                write("abstract ");
+            }
+        }
+        function writeImportEqualsDeclaration(node) {
+            emitJsDocComments(node);
+            if (node.flags & 1) {
+                write("export ");
+            }
+            write("import ");
+            writeTextOfNode(currentText, node.name);
+            write(" = ");
+            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
+                write(";");
+            }
+            else {
+                write("require(");
+                emitExternalModuleSpecifier(node);
+                write(");");
+            }
+            writer.writeLine();
+            function getImportEntityNameVisibilityError(symbolAccessibilityResult) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
+                    errorNode: node,
+                    typeName: node.name
+                };
+            }
+        }
+        function isVisibleNamedBinding(namedBindings) {
+            if (namedBindings) {
+                if (namedBindings.kind === 232) {
+                    return resolver.isDeclarationVisible(namedBindings);
+                }
+                else {
+                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
+                }
+            }
+        }
+        function writeImportDeclaration(node) {
+            emitJsDocComments(node);
+            if (node.flags & 1) {
+                write("export ");
+            }
+            write("import ");
+            if (node.importClause) {
+                var currentWriterPos = writer.getTextPos();
+                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
+                    writeTextOfNode(currentText, node.importClause.name);
+                }
+                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        write(", ");
+                    }
+                    if (node.importClause.namedBindings.kind === 232) {
+                        write("* as ");
+                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
+                    }
+                    else {
+                        write("{ ");
+                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
+                        write(" }");
+                    }
+                }
+                write(" from ");
+            }
+            emitExternalModuleSpecifier(node);
+            write(";");
+            writer.writeLine();
+        }
+        function emitExternalModuleSpecifier(parent) {
+            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 225;
+            var moduleSpecifier;
+            if (parent.kind === 229) {
+                var node = parent;
+                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
+            }
+            else if (parent.kind === 225) {
+                moduleSpecifier = parent.name;
+            }
+            else {
+                var node = parent;
+                moduleSpecifier = node.moduleSpecifier;
+            }
+            if (moduleSpecifier.kind === 9 && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
+                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
+                if (moduleName) {
+                    write('"');
+                    write(moduleName);
+                    write('"');
+                    return;
+                }
+            }
+            writeTextOfNode(currentText, moduleSpecifier);
+        }
+        function emitImportOrExportSpecifier(node) {
+            if (node.propertyName) {
+                writeTextOfNode(currentText, node.propertyName);
+                write(" as ");
+            }
+            writeTextOfNode(currentText, node.name);
+        }
+        function emitExportSpecifier(node) {
+            emitImportOrExportSpecifier(node);
+            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
+            writeAsynchronousModuleElements(nodes);
+        }
+        function emitExportDeclaration(node) {
+            emitJsDocComments(node);
+            write("export ");
+            if (node.exportClause) {
+                write("{ ");
+                emitCommaList(node.exportClause.elements, emitExportSpecifier);
+                write(" }");
+            }
+            else {
+                write("*");
+            }
+            if (node.moduleSpecifier) {
+                write(" from ");
+                emitExternalModuleSpecifier(node);
+            }
+            write(";");
+            writer.writeLine();
+        }
+        function writeModuleDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isGlobalScopeAugmentation(node)) {
+                write("global ");
+            }
+            else {
+                if (node.flags & 4096) {
+                    write("namespace ");
+                }
+                else {
+                    write("module ");
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    emitExternalModuleSpecifier(node);
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
+                }
+            }
+            while (node.body.kind !== 226) {
+                node = node.body;
+                write(".");
+                writeTextOfNode(currentText, node.name);
+            }
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.body.statements);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function writeTypeAliasDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("type ");
+            writeTextOfNode(currentText, node.name);
+            emitTypeParameters(node.typeParameters);
+            write(" = ");
+            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
+            write(";");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+            function getTypeAliasDeclarationVisibilityError(symbolAccessibilityResult) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
+                    errorNode: node.type,
+                    typeName: node.name
+                };
+            }
+        }
+        function writeEnumDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isConst(node)) {
+                write("const ");
+            }
+            write("enum ");
+            writeTextOfNode(currentText, node.name);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+        }
+        function emitEnumMemberDeclaration(node) {
+            emitJsDocComments(node);
+            writeTextOfNode(currentText, node.name);
+            var enumMemberValue = resolver.getConstantValue(node);
+            if (enumMemberValue !== undefined) {
+                write(" = ");
+                write(enumMemberValue.toString());
+            }
+            write(",");
+            writeLine();
+        }
+        function isPrivateMethodTypeParameter(node) {
+            return node.parent.kind === 147 && (node.parent.flags & 8);
+        }
+        function emitTypeParameters(typeParameters) {
+            function emitTypeParameter(node) {
+                increaseIndent();
+                emitJsDocComments(node);
+                decreaseIndent();
+                writeTextOfNode(currentText, node.name);
+                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
+                    write(" extends ");
+                    if (node.parent.kind === 156 ||
+                        node.parent.kind === 157 ||
+                        (node.parent.parent && node.parent.parent.kind === 159)) {
+                        ts.Debug.assert(node.parent.kind === 147 ||
+                            node.parent.kind === 146 ||
+                            node.parent.kind === 156 ||
+                            node.parent.kind === 157 ||
+                            node.parent.kind === 151 ||
+                            node.parent.kind === 152);
+                        emitType(node.constraint);
+                    }
+                    else {
+                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
+                    }
+                }
+                function getTypeParameterConstraintVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage;
+                    switch (node.parent.kind) {
+                        case 221:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
+                            break;
+                        case 222:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 152:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 151:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 147:
+                        case 146:
+                            if (node.parent.flags & 32) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else if (node.parent.parent.kind === 221) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                            }
+                            break;
+                        case 220:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                            break;
+                        default:
+                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: node.name
+                    };
+                }
+            }
+            if (typeParameters) {
+                write("<");
+                emitCommaList(typeParameters, emitTypeParameter);
+                write(">");
+            }
+        }
+        function emitHeritageClause(typeReferences, isImplementsList) {
+            if (typeReferences) {
+                write(isImplementsList ? " implements " : " extends ");
+                emitCommaList(typeReferences, emitTypeOfTypeReference);
+            }
+            function emitTypeOfTypeReference(node) {
+                if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
+                }
+                else if (!isImplementsList && node.expression.kind === 93) {
+                    write("null");
+                }
+                else {
+                    writer.getSymbolAccessibilityDiagnostic = getHeritageClauseVisibilityError;
+                    resolver.writeBaseConstructorTypeOfClass(enclosingDeclaration, enclosingDeclaration, 2, writer);
+                }
+                function getHeritageClauseVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage;
+                    if (node.parent.parent.kind === 221) {
+                        diagnosticMessage = isImplementsList ?
+                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
+                            ts.Diagnostics.Extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        diagnosticMessage = ts.Diagnostics.Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: node.parent.parent.name
+                    };
+                }
+            }
+        }
+        function writeClassDeclaration(node) {
+            function emitParameterProperties(constructorDeclaration) {
+                if (constructorDeclaration) {
+                    ts.forEach(constructorDeclaration.parameters, function (param) {
+                        if (param.flags & 92) {
+                            emitPropertyDeclaration(param);
+                        }
+                    });
+                }
+            }
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (node.flags & 128) {
+                write("abstract ");
+            }
+            write("class ");
+            writeTextOfNode(currentText, node.name);
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitTypeParameters(node.typeParameters);
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            if (baseTypeNode) {
+                emitHeritageClause([baseTypeNode], false);
+            }
+            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), true);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitParameterProperties(ts.getFirstConstructorWithBody(node));
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function writeInterfaceDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("interface ");
+            writeTextOfNode(currentText, node.name);
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitTypeParameters(node.typeParameters);
+            emitHeritageClause(ts.getInterfaceBaseTypeNodes(node), false);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function emitPropertyDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            emitJsDocComments(node);
+            emitClassMemberDeclarationFlags(node.flags);
+            emitVariableDeclaration(node);
+            write(";");
+            writeLine();
+        }
+        function emitVariableDeclaration(node) {
+            if (node.kind !== 218 || resolver.isDeclarationVisible(node)) {
+                if (ts.isBindingPattern(node.name)) {
+                    emitBindingPattern(node.name);
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
+                    if ((node.kind === 145 || node.kind === 144 || node.kind === 142) && ts.hasQuestionToken(node)) {
+                        write("?");
+                    }
+                    if ((node.kind === 145 || node.kind === 144) && node.parent.kind === 159) {
+                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
+                    }
+                    else if (!(node.flags & 8)) {
+                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
+                    }
+                }
+            }
+            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                if (node.kind === 218) {
+                    return symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 ?
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
+                }
+                else if (node.kind === 145 || node.kind === 144) {
+                    if (node.flags & 32) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else if (node.parent.kind === 221) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
+                    }
+                }
+            }
+            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
+            }
+            function emitBindingPattern(bindingPattern) {
+                var elements = [];
+                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (element.kind !== 193) {
+                        elements.push(element);
+                    }
+                }
+                emitCommaList(elements, emitBindingElement);
+            }
+            function emitBindingElement(bindingElement) {
+                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                    return diagnosticMessage !== undefined ? {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: bindingElement,
+                        typeName: bindingElement.name
+                    } : undefined;
+                }
+                if (bindingElement.name) {
+                    if (ts.isBindingPattern(bindingElement.name)) {
+                        emitBindingPattern(bindingElement.name);
+                    }
+                    else {
+                        writeTextOfNode(currentText, bindingElement.name);
+                        writeTypeOfDeclaration(bindingElement, undefined, getBindingElementTypeVisibilityError);
+                    }
+                }
+            }
+        }
+        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
+            if (node.type) {
+                write(": ");
+                emitType(node.type);
+            }
+        }
+        function isVariableStatementVisible(node) {
+            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
+        }
+        function writeVariableStatement(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isLet(node.declarationList)) {
+                write("let ");
+            }
+            else if (ts.isConst(node.declarationList)) {
+                write("const ");
+            }
+            else {
+                write("var ");
+            }
+            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
+            write(";");
+            writeLine();
+        }
+        function emitAccessorDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+            var accessorWithTypeAnnotation;
+            if (node === accessors.firstAccessor) {
+                emitJsDocComments(accessors.getAccessor);
+                emitJsDocComments(accessors.setAccessor);
+                emitClassMemberDeclarationFlags(node.flags | (accessors.setAccessor ? 0 : 64));
+                writeTextOfNode(currentText, node.name);
+                if (!(node.flags & 8)) {
+                    accessorWithTypeAnnotation = node;
+                    var type = getTypeAnnotationFromAccessor(node);
+                    if (!type) {
+                        var anotherAccessor = node.kind === 149 ? accessors.setAccessor : accessors.getAccessor;
+                        type = getTypeAnnotationFromAccessor(anotherAccessor);
+                        if (type) {
+                            accessorWithTypeAnnotation = anotherAccessor;
+                        }
+                    }
+                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
+                }
+                write(";");
+                writeLine();
+            }
+            function getTypeAnnotationFromAccessor(accessor) {
+                if (accessor) {
+                    return accessor.kind === 149
+                        ? accessor.type
+                        : accessor.parameters.length > 0
+                            ? accessor.parameters[0].type
+                            : undefined;
+                }
+            }
+            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                if (accessorWithTypeAnnotation.kind === 150) {
+                    if (accessorWithTypeAnnotation.parent.flags & 32) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.parameters[0],
+                        typeName: accessorWithTypeAnnotation.name
+                    };
+                }
+                else {
+                    if (accessorWithTypeAnnotation.flags & 32) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.name,
+                        typeName: undefined
+                    };
+                }
+            }
+        }
+        function writeFunctionDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            if (!resolver.isImplementationOfOverload(node)) {
+                emitJsDocComments(node);
+                if (node.kind === 220) {
+                    emitModuleElementDeclarationFlags(node);
+                }
+                else if (node.kind === 147 || node.kind === 148) {
+                    emitClassMemberDeclarationFlags(node.flags);
+                }
+                if (node.kind === 220) {
+                    write("function ");
+                    writeTextOfNode(currentText, node.name);
+                }
+                else if (node.kind === 148) {
+                    write("constructor");
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
+                    if (ts.hasQuestionToken(node)) {
+                        write("?");
+                    }
+                }
+                emitSignatureDeclaration(node);
+            }
+        }
+        function emitSignatureDeclarationWithJsDocComments(node) {
+            emitJsDocComments(node);
+            emitSignatureDeclaration(node);
+        }
+        function emitSignatureDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            var closeParenthesizedFunctionType = false;
+            if (node.kind === 153) {
+                emitClassMemberDeclarationFlags(node.flags);
+                write("[");
+            }
+            else {
+                if (node.kind === 152 || node.kind === 157) {
+                    write("new ");
+                }
+                else if (node.kind === 156) {
+                    var currentOutput = writer.getText();
+                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
+                        closeParenthesizedFunctionType = true;
+                        write("(");
+                    }
+                }
+                emitTypeParameters(node.typeParameters);
+                write("(");
+            }
+            emitCommaList(node.parameters, emitParameterDeclaration);
+            if (node.kind === 153) {
+                write("]");
+            }
+            else {
+                write(")");
+            }
+            var isFunctionTypeOrConstructorType = node.kind === 156 || node.kind === 157;
+            if (isFunctionTypeOrConstructorType || node.parent.kind === 159) {
+                if (node.type) {
+                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
+                    emitType(node.type);
+                }
+            }
+            else if (node.kind !== 148 && !(node.flags & 8)) {
+                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
+            }
+            enclosingDeclaration = prevEnclosingDeclaration;
+            if (!isFunctionTypeOrConstructorType) {
+                write(";");
+                writeLine();
+            }
+            else if (closeParenthesizedFunctionType) {
+                write(")");
+            }
+            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                switch (node.kind) {
+                    case 152:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 151:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 153:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 147:
+                    case 146:
+                        if (node.flags & 32) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 ?
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else if (node.parent.kind === 221) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 ?
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
+                        }
+                        break;
+                    case 220:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
+                        break;
+                    default:
+                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
+                }
+                return {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node.name || node
+                };
+            }
+        }
+        function emitParameterDeclaration(node) {
+            increaseIndent();
+            emitJsDocComments(node);
+            if (node.dotDotDotToken) {
+                write("...");
+            }
+            if (ts.isBindingPattern(node.name)) {
+                emitBindingPattern(node.name);
+            }
+            else {
+                writeTextOfNode(currentText, node.name);
+            }
+            if (resolver.isOptionalParameter(node)) {
+                write("?");
+            }
+            decreaseIndent();
+            if (node.parent.kind === 156 ||
+                node.parent.kind === 157 ||
+                node.parent.parent.kind === 159) {
+                emitTypeOfVariableDeclarationFromTypeLiteral(node);
+            }
+            else if (!(node.parent.flags & 8)) {
+                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
+            }
+            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
+            }
+            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                switch (node.parent.kind) {
+                    case 148:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
+                    case 152:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 151:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 147:
+                    case 146:
+                        if (node.parent.flags & 32) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 ?
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else if (node.parent.parent.kind === 221) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 ?
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                        }
+                    case 220:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                    default:
+                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
+                }
+            }
+            function emitBindingPattern(bindingPattern) {
+                if (bindingPattern.kind === 167) {
+                    write("{");
+                    emitCommaList(bindingPattern.elements, emitBindingElement);
+                    write("}");
+                }
+                else if (bindingPattern.kind === 168) {
+                    write("[");
+                    var elements = bindingPattern.elements;
+                    emitCommaList(elements, emitBindingElement);
+                    if (elements && elements.hasTrailingComma) {
+                        write(", ");
+                    }
+                    write("]");
+                }
+            }
+            function emitBindingElement(bindingElement) {
+                if (bindingElement.kind === 193) {
+                    write(" ");
+                }
+                else if (bindingElement.kind === 169) {
+                    if (bindingElement.propertyName) {
+                        writeTextOfNode(currentText, bindingElement.propertyName);
+                        write(": ");
+                    }
+                    if (bindingElement.name) {
+                        if (ts.isBindingPattern(bindingElement.name)) {
+                            emitBindingPattern(bindingElement.name);
+                        }
+                        else {
+                            ts.Debug.assert(bindingElement.name.kind === 69);
+                            if (bindingElement.dotDotDotToken) {
+                                write("...");
+                            }
+                            writeTextOfNode(currentText, bindingElement.name);
+                        }
+                    }
+                }
+            }
+        }
+        function emitNode(node) {
+            switch (node.kind) {
+                case 220:
+                case 225:
+                case 229:
+                case 222:
+                case 221:
+                case 223:
+                case 224:
+                    return emitModuleElement(node, isModuleElementVisible(node));
+                case 200:
+                    return emitModuleElement(node, isVariableStatementVisible(node));
+                case 230:
+                    return emitModuleElement(node, !node.importClause);
+                case 236:
+                    return emitExportDeclaration(node);
+                case 148:
+                case 147:
+                case 146:
+                    return writeFunctionDeclaration(node);
+                case 152:
+                case 151:
+                case 153:
+                    return emitSignatureDeclarationWithJsDocComments(node);
+                case 149:
+                case 150:
+                    return emitAccessorDeclaration(node);
+                case 145:
+                case 144:
+                    return emitPropertyDeclaration(node);
+                case 255:
+                    return emitEnumMemberDeclaration(node);
+                case 235:
+                    return emitExportAssignment(node);
+                case 256:
+                    return emitSourceFile(node);
+            }
+        }
+        function writeReferencePath(referencedFile, addBundledFileReference) {
+            var declFileName;
+            var addedBundledEmitReference = false;
+            if (ts.isDeclarationFile(referencedFile)) {
+                declFileName = referencedFile.fileName;
+            }
+            else {
+                ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile);
+            }
+            if (declFileName) {
+                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, false);
+                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
+            }
+            return addedBundledEmitReference;
+            function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) {
+                if (isBundledEmit && !addBundledFileReference) {
+                    return;
+                }
+                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
+                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
+                addedBundledEmitReference = isBundledEmit;
+            }
+        }
+    }
+    function writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) {
+        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit);
+        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
+        if (!emitSkipped) {
+            var declarationOutput = emitDeclarationResult.referencesOutput
+                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
+            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
+        }
+        return emitSkipped;
+        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
+            var appliedSyncOutputPos = 0;
+            var declarationOutput = "";
+            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                if (aliasEmitInfo.asynchronousOutput) {
+                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
+                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
+                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
+                }
+            });
+            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
+            return declarationOutput;
+        }
+    }
+    ts.writeDeclarationFile = writeDeclarationFile;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getResolvedExternalModuleName(host, file) {
+        return file.moduleName || ts.getExternalModuleNameFromPath(host, file.fileName);
+    }
+    ts.getResolvedExternalModuleName = getResolvedExternalModuleName;
+    function getExternalModuleNameFromDeclaration(host, resolver, declaration) {
+        var file = resolver.getExternalModuleFileFromDeclaration(declaration);
+        if (!file || ts.isDeclarationFile(file)) {
+            return undefined;
+        }
+        return getResolvedExternalModuleName(host, file);
+    }
+    ts.getExternalModuleNameFromDeclaration = getExternalModuleNameFromDeclaration;
+    var entities = {
+        "quot": 0x0022,
+        "amp": 0x0026,
+        "apos": 0x0027,
+        "lt": 0x003C,
+        "gt": 0x003E,
+        "nbsp": 0x00A0,
+        "iexcl": 0x00A1,
+        "cent": 0x00A2,
+        "pound": 0x00A3,
+        "curren": 0x00A4,
+        "yen": 0x00A5,
+        "brvbar": 0x00A6,
+        "sect": 0x00A7,
+        "uml": 0x00A8,
+        "copy": 0x00A9,
+        "ordf": 0x00AA,
+        "laquo": 0x00AB,
+        "not": 0x00AC,
+        "shy": 0x00AD,
+        "reg": 0x00AE,
+        "macr": 0x00AF,
+        "deg": 0x00B0,
+        "plusmn": 0x00B1,
+        "sup2": 0x00B2,
+        "sup3": 0x00B3,
+        "acute": 0x00B4,
+        "micro": 0x00B5,
+        "para": 0x00B6,
+        "middot": 0x00B7,
+        "cedil": 0x00B8,
+        "sup1": 0x00B9,
+        "ordm": 0x00BA,
+        "raquo": 0x00BB,
+        "frac14": 0x00BC,
+        "frac12": 0x00BD,
+        "frac34": 0x00BE,
+        "iquest": 0x00BF,
+        "Agrave": 0x00C0,
+        "Aacute": 0x00C1,
+        "Acirc": 0x00C2,
+        "Atilde": 0x00C3,
+        "Auml": 0x00C4,
+        "Aring": 0x00C5,
+        "AElig": 0x00C6,
+        "Ccedil": 0x00C7,
+        "Egrave": 0x00C8,
+        "Eacute": 0x00C9,
+        "Ecirc": 0x00CA,
+        "Euml": 0x00CB,
+        "Igrave": 0x00CC,
+        "Iacute": 0x00CD,
+        "Icirc": 0x00CE,
+        "Iuml": 0x00CF,
+        "ETH": 0x00D0,
+        "Ntilde": 0x00D1,
+        "Ograve": 0x00D2,
+        "Oacute": 0x00D3,
+        "Ocirc": 0x00D4,
+        "Otilde": 0x00D5,
+        "Ouml": 0x00D6,
+        "times": 0x00D7,
+        "Oslash": 0x00D8,
+        "Ugrave": 0x00D9,
+        "Uacute": 0x00DA,
+        "Ucirc": 0x00DB,
+        "Uuml": 0x00DC,
+        "Yacute": 0x00DD,
+        "THORN": 0x00DE,
+        "szlig": 0x00DF,
+        "agrave": 0x00E0,
+        "aacute": 0x00E1,
+        "acirc": 0x00E2,
+        "atilde": 0x00E3,
+        "auml": 0x00E4,
+        "aring": 0x00E5,
+        "aelig": 0x00E6,
+        "ccedil": 0x00E7,
+        "egrave": 0x00E8,
+        "eacute": 0x00E9,
+        "ecirc": 0x00EA,
+        "euml": 0x00EB,
+        "igrave": 0x00EC,
+        "iacute": 0x00ED,
+        "icirc": 0x00EE,
+        "iuml": 0x00EF,
+        "eth": 0x00F0,
+        "ntilde": 0x00F1,
+        "ograve": 0x00F2,
+        "oacute": 0x00F3,
+        "ocirc": 0x00F4,
+        "otilde": 0x00F5,
+        "ouml": 0x00F6,
+        "divide": 0x00F7,
+        "oslash": 0x00F8,
+        "ugrave": 0x00F9,
+        "uacute": 0x00FA,
+        "ucirc": 0x00FB,
+        "uuml": 0x00FC,
+        "yacute": 0x00FD,
+        "thorn": 0x00FE,
+        "yuml": 0x00FF,
+        "OElig": 0x0152,
+        "oelig": 0x0153,
+        "Scaron": 0x0160,
+        "scaron": 0x0161,
+        "Yuml": 0x0178,
+        "fnof": 0x0192,
+        "circ": 0x02C6,
+        "tilde": 0x02DC,
+        "Alpha": 0x0391,
+        "Beta": 0x0392,
+        "Gamma": 0x0393,
+        "Delta": 0x0394,
+        "Epsilon": 0x0395,
+        "Zeta": 0x0396,
+        "Eta": 0x0397,
+        "Theta": 0x0398,
+        "Iota": 0x0399,
+        "Kappa": 0x039A,
+        "Lambda": 0x039B,
+        "Mu": 0x039C,
+        "Nu": 0x039D,
+        "Xi": 0x039E,
+        "Omicron": 0x039F,
+        "Pi": 0x03A0,
+        "Rho": 0x03A1,
+        "Sigma": 0x03A3,
+        "Tau": 0x03A4,
+        "Upsilon": 0x03A5,
+        "Phi": 0x03A6,
+        "Chi": 0x03A7,
+        "Psi": 0x03A8,
+        "Omega": 0x03A9,
+        "alpha": 0x03B1,
+        "beta": 0x03B2,
+        "gamma": 0x03B3,
+        "delta": 0x03B4,
+        "epsilon": 0x03B5,
+        "zeta": 0x03B6,
+        "eta": 0x03B7,
+        "theta": 0x03B8,
+        "iota": 0x03B9,
+        "kappa": 0x03BA,
+        "lambda": 0x03BB,
+        "mu": 0x03BC,
+        "nu": 0x03BD,
+        "xi": 0x03BE,
+        "omicron": 0x03BF,
+        "pi": 0x03C0,
+        "rho": 0x03C1,
+        "sigmaf": 0x03C2,
+        "sigma": 0x03C3,
+        "tau": 0x03C4,
+        "upsilon": 0x03C5,
+        "phi": 0x03C6,
+        "chi": 0x03C7,
+        "psi": 0x03C8,
+        "omega": 0x03C9,
+        "thetasym": 0x03D1,
+        "upsih": 0x03D2,
+        "piv": 0x03D6,
+        "ensp": 0x2002,
+        "emsp": 0x2003,
+        "thinsp": 0x2009,
+        "zwnj": 0x200C,
+        "zwj": 0x200D,
+        "lrm": 0x200E,
+        "rlm": 0x200F,
+        "ndash": 0x2013,
+        "mdash": 0x2014,
+        "lsquo": 0x2018,
+        "rsquo": 0x2019,
+        "sbquo": 0x201A,
+        "ldquo": 0x201C,
+        "rdquo": 0x201D,
+        "bdquo": 0x201E,
+        "dagger": 0x2020,
+        "Dagger": 0x2021,
+        "bull": 0x2022,
+        "hellip": 0x2026,
+        "permil": 0x2030,
+        "prime": 0x2032,
+        "Prime": 0x2033,
+        "lsaquo": 0x2039,
+        "rsaquo": 0x203A,
+        "oline": 0x203E,
+        "frasl": 0x2044,
+        "euro": 0x20AC,
+        "image": 0x2111,
+        "weierp": 0x2118,
+        "real": 0x211C,
+        "trade": 0x2122,
+        "alefsym": 0x2135,
+        "larr": 0x2190,
+        "uarr": 0x2191,
+        "rarr": 0x2192,
+        "darr": 0x2193,
+        "harr": 0x2194,
+        "crarr": 0x21B5,
+        "lArr": 0x21D0,
+        "uArr": 0x21D1,
+        "rArr": 0x21D2,
+        "dArr": 0x21D3,
+        "hArr": 0x21D4,
+        "forall": 0x2200,
+        "part": 0x2202,
+        "exist": 0x2203,
+        "empty": 0x2205,
+        "nabla": 0x2207,
+        "isin": 0x2208,
+        "notin": 0x2209,
+        "ni": 0x220B,
+        "prod": 0x220F,
+        "sum": 0x2211,
+        "minus": 0x2212,
+        "lowast": 0x2217,
+        "radic": 0x221A,
+        "prop": 0x221D,
+        "infin": 0x221E,
+        "ang": 0x2220,
+        "and": 0x2227,
+        "or": 0x2228,
+        "cap": 0x2229,
+        "cup": 0x222A,
+        "int": 0x222B,
+        "there4": 0x2234,
+        "sim": 0x223C,
+        "cong": 0x2245,
+        "asymp": 0x2248,
+        "ne": 0x2260,
+        "equiv": 0x2261,
+        "le": 0x2264,
+        "ge": 0x2265,
+        "sub": 0x2282,
+        "sup": 0x2283,
+        "nsub": 0x2284,
+        "sube": 0x2286,
+        "supe": 0x2287,
+        "oplus": 0x2295,
+        "otimes": 0x2297,
+        "perp": 0x22A5,
+        "sdot": 0x22C5,
+        "lceil": 0x2308,
+        "rceil": 0x2309,
+        "lfloor": 0x230A,
+        "rfloor": 0x230B,
+        "lang": 0x2329,
+        "rang": 0x232A,
+        "loz": 0x25CA,
+        "spades": 0x2660,
+        "clubs": 0x2663,
+        "hearts": 0x2665,
+        "diams": 0x2666
+    };
+    function emitFiles(resolver, host, targetSourceFile) {
+        var extendsHelper = "\nvar __extends = (this && this.__extends) || function (d, b) {\n    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n    function __() { this.constructor = d; }\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n};";
+        var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n    for (var s, i = 1, n = arguments.length; i < n; i++) {\n        s = arguments[i];\n        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n            t[p] = s[p];\n    }\n    return t;\n};";
+        var decorateHelper = "\nvar __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\n};";
+        var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};";
+        var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n    return function (target, key) { decorator(target, key, paramIndex); }\n};";
+        var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n    return new (P || (P = Promise))(function (resolve, reject) {\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n        step((generator = generator.apply(thisArg, _arguments)).next());\n    });\n};";
+        var compilerOptions = host.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var modulekind = ts.getEmitModuleKind(compilerOptions);
+        var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
+        var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined;
+        var emitterDiagnostics = ts.createDiagnosticCollection();
+        var emitSkipped = false;
+        var newLine = host.getNewLine();
+        var emitJavaScript = createFileEmitter();
+        ts.forEachExpectedEmitFile(host, emitFile, targetSourceFile);
+        return {
+            emitSkipped: emitSkipped,
+            diagnostics: emitterDiagnostics.getDiagnostics(),
+            emittedFiles: emittedFilesList,
+            sourceMaps: sourceMapDataList
+        };
+        function isUniqueLocalName(name, container) {
+            for (var node = container; ts.isNodeDescendentOf(node, container); node = node.nextContainer) {
+                if (node.locals && ts.hasProperty(node.locals, name)) {
+                    if (node.locals[name].flags & (107455 | 1048576 | 8388608)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function setLabeledJump(state, isBreak, labelText, labelMarker) {
+            if (isBreak) {
+                if (!state.labeledNonLocalBreaks) {
+                    state.labeledNonLocalBreaks = {};
+                }
+                state.labeledNonLocalBreaks[labelText] = labelMarker;
+            }
+            else {
+                if (!state.labeledNonLocalContinues) {
+                    state.labeledNonLocalContinues = {};
+                }
+                state.labeledNonLocalContinues[labelText] = labelMarker;
+            }
+        }
+        function hoistVariableDeclarationFromLoop(state, declaration) {
+            if (!state.hoistedLocalVariables) {
+                state.hoistedLocalVariables = [];
+            }
+            visit(declaration.name);
+            function visit(node) {
+                if (node.kind === 69) {
+                    state.hoistedLocalVariables.push(node);
+                }
+                else {
+                    for (var _a = 0, _b = node.elements; _a < _b.length; _a++) {
+                        var element = _b[_a];
+                        visit(element.name);
+                    }
+                }
+            }
+        }
+        function createFileEmitter() {
+            var writer = ts.createTextWriter(newLine);
+            var write = writer.write, writeTextOfNode = writer.writeTextOfNode, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent;
+            var sourceMap = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? ts.createSourceMapWriter(host, writer) : ts.getNullSourceMapWriter();
+            var setSourceFile = sourceMap.setSourceFile, emitStart = sourceMap.emitStart, emitEnd = sourceMap.emitEnd, emitPos = sourceMap.emitPos;
+            var currentSourceFile;
+            var currentText;
+            var currentLineMap;
+            var currentFileIdentifiers;
+            var renamedDependencies;
+            var isEs6Module;
+            var isCurrentFileExternalModule;
+            var exportFunctionForFile;
+            var contextObjectForFile;
+            var generatedNameSet;
+            var nodeToGeneratedName;
+            var computedPropertyNamesToGeneratedNames;
+            var decoratedClassAliases;
+            var convertedLoopState;
+            var extendsEmitted;
+            var assignEmitted;
+            var decorateEmitted;
+            var paramEmitted;
+            var awaiterEmitted;
+            var tempFlags = 0;
+            var tempVariables;
+            var tempParameters;
+            var externalImports;
+            var exportSpecifiers;
+            var exportEquals;
+            var hasExportStarsToExportValues;
+            var detachedCommentsInfo;
+            var sourceMapData;
+            var isOwnFileEmit;
+            var emitLeadingCommentsOfPosition = compilerOptions.removeComments ? function (pos) { } : emitLeadingCommentsOfPositionWorker;
+            var setSourceMapWriterEmit = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? changeSourceMapEmit : function (writer) { };
+            var moduleEmitDelegates = (_a = {},
+                _a[ts.ModuleKind.ES6] = emitES6Module,
+                _a[ts.ModuleKind.AMD] = emitAMDModule,
+                _a[ts.ModuleKind.System] = emitSystemModule,
+                _a[ts.ModuleKind.UMD] = emitUMDModule,
+                _a[ts.ModuleKind.CommonJS] = emitCommonJSModule,
+                _a
+            );
+            var bundleEmitDelegates = (_b = {},
+                _b[ts.ModuleKind.ES6] = function () { },
+                _b[ts.ModuleKind.AMD] = emitAMDModule,
+                _b[ts.ModuleKind.System] = emitSystemModule,
+                _b[ts.ModuleKind.UMD] = function () { },
+                _b[ts.ModuleKind.CommonJS] = function () { },
+                _b
+            );
+            return doEmit;
+            function doEmit(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
+                sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
+                generatedNameSet = {};
+                nodeToGeneratedName = [];
+                decoratedClassAliases = [];
+                isOwnFileEmit = !isBundledEmit;
+                if (isBundledEmit && modulekind) {
+                    ts.forEach(sourceFiles, emitEmitHelpers);
+                }
+                ts.forEach(sourceFiles, emitSourceFile);
+                writeLine();
+                var sourceMappingURL = sourceMap.getSourceMappingURL();
+                if (sourceMappingURL) {
+                    write("//# sourceMappingURL=" + sourceMappingURL);
+                }
+                writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, compilerOptions.emitBOM, sourceFiles);
+                sourceMap.reset();
+                writer.reset();
+                currentSourceFile = undefined;
+                currentText = undefined;
+                currentLineMap = undefined;
+                exportFunctionForFile = undefined;
+                contextObjectForFile = undefined;
+                generatedNameSet = undefined;
+                nodeToGeneratedName = undefined;
+                decoratedClassAliases = undefined;
+                computedPropertyNamesToGeneratedNames = undefined;
+                convertedLoopState = undefined;
+                extendsEmitted = false;
+                decorateEmitted = false;
+                paramEmitted = false;
+                awaiterEmitted = false;
+                assignEmitted = false;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                externalImports = undefined;
+                exportSpecifiers = undefined;
+                exportEquals = undefined;
+                hasExportStarsToExportValues = undefined;
+                detachedCommentsInfo = undefined;
+                sourceMapData = undefined;
+                isEs6Module = false;
+                renamedDependencies = undefined;
+                isCurrentFileExternalModule = false;
+            }
+            function emitSourceFile(sourceFile) {
+                currentSourceFile = sourceFile;
+                currentText = sourceFile.text;
+                currentLineMap = ts.getLineStarts(sourceFile);
+                exportFunctionForFile = undefined;
+                contextObjectForFile = undefined;
+                isEs6Module = sourceFile.symbol && sourceFile.symbol.exports && !!sourceFile.symbol.exports["___esModule"];
+                renamedDependencies = sourceFile.renamedDependencies;
+                currentFileIdentifiers = sourceFile.identifiers;
+                isCurrentFileExternalModule = ts.isExternalModule(sourceFile);
+                setSourceFile(sourceFile);
+                emitNodeWithCommentsAndWithoutSourcemap(sourceFile);
+            }
+            function isUniqueName(name) {
+                return !resolver.hasGlobalName(name) &&
+                    !ts.hasProperty(currentFileIdentifiers, name) &&
+                    !ts.hasProperty(generatedNameSet, name);
+            }
+            function makeTempVariableName(flags) {
+                if (flags && !(tempFlags & flags)) {
+                    var name_24 = flags === 268435456 ? "_i" : "_n";
+                    if (isUniqueName(name_24)) {
+                        tempFlags |= flags;
+                        return name_24;
+                    }
+                }
+                while (true) {
+                    var count = tempFlags & 268435455;
+                    tempFlags++;
+                    if (count !== 8 && count !== 13) {
+                        var name_25 = count < 26 ? "_" + String.fromCharCode(97 + count) : "_" + (count - 26);
+                        if (isUniqueName(name_25)) {
+                            return name_25;
+                        }
+                    }
+                }
+            }
+            function makeUniqueName(baseName) {
+                if (baseName.charCodeAt(baseName.length - 1) !== 95) {
+                    baseName += "_";
+                }
+                var i = 1;
+                while (true) {
+                    var generatedName = baseName + i;
+                    if (isUniqueName(generatedName)) {
+                        return generatedNameSet[generatedName] = generatedName;
+                    }
+                    i++;
+                }
+            }
+            function generateNameForModuleOrEnum(node) {
+                var name = node.name.text;
+                return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
+            }
+            function generateNameForImportOrExportDeclaration(node) {
+                var expr = ts.getExternalModuleName(node);
+                var baseName = expr.kind === 9 ?
+                    ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module";
+                return makeUniqueName(baseName);
+            }
+            function generateNameForExportDefault() {
+                return makeUniqueName("default");
+            }
+            function generateNameForClassExpression() {
+                return makeUniqueName("class");
+            }
+            function generateNameForNode(node) {
+                switch (node.kind) {
+                    case 69:
+                        return makeUniqueName(node.text);
+                    case 225:
+                    case 224:
+                        return generateNameForModuleOrEnum(node);
+                    case 230:
+                    case 236:
+                        return generateNameForImportOrExportDeclaration(node);
+                    case 220:
+                    case 221:
+                    case 235:
+                        return generateNameForExportDefault();
+                    case 192:
+                        return generateNameForClassExpression();
+                }
+            }
+            function getGeneratedNameForNode(node) {
+                var id = ts.getNodeId(node);
+                return nodeToGeneratedName[id] || (nodeToGeneratedName[id] = ts.unescapeIdentifier(generateNameForNode(node)));
+            }
+            function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) {
+                if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
+                    ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), false, sourceFiles);
+                }
+                if (sourceMapDataList) {
+                    sourceMapDataList.push(sourceMap.getSourceMapData());
+                }
+                ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles);
+            }
+            function createTempVariable(flags) {
+                var result = ts.createSynthesizedNode(69);
+                result.text = makeTempVariableName(flags);
+                return result;
+            }
+            function recordTempDeclaration(name) {
+                if (!tempVariables) {
+                    tempVariables = [];
+                }
+                tempVariables.push(name);
+            }
+            function createAndRecordTempVariable(flags) {
+                var temp = createTempVariable(flags);
+                recordTempDeclaration(temp);
+                return temp;
+            }
+            function emitTempDeclarations(newLine) {
+                if (tempVariables) {
+                    if (newLine) {
+                        writeLine();
+                    }
+                    else {
+                        write(" ");
+                    }
+                    write("var ");
+                    emitCommaList(tempVariables);
+                    write(";");
+                }
+            }
+            function emitToken(tokenKind, startPos, emitFn) {
+                var tokenStartPos = ts.skipTrivia(currentText, startPos);
+                emitPos(tokenStartPos);
+                var tokenString = ts.tokenToString(tokenKind);
+                if (emitFn) {
+                    emitFn();
+                }
+                else {
+                    write(tokenString);
+                }
+                var tokenEndPos = tokenStartPos + tokenString.length;
+                emitPos(tokenEndPos);
+                return tokenEndPos;
+            }
+            function emitOptional(prefix, node) {
+                if (node) {
+                    write(prefix);
+                    emit(node);
+                }
+            }
+            function emitParenthesizedIf(node, parenthesized) {
+                if (parenthesized) {
+                    write("(");
+                }
+                emit(node);
+                if (parenthesized) {
+                    write(")");
+                }
+            }
+            function emitLinePreservingList(parent, nodes, allowTrailingComma, spacesBetweenBraces) {
+                ts.Debug.assert(nodes.length > 0);
+                increaseIndent();
+                if (nodeStartPositionsAreOnSameLine(parent, nodes[0])) {
+                    if (spacesBetweenBraces) {
+                        write(" ");
+                    }
+                }
+                else {
+                    writeLine();
+                }
+                for (var i = 0, n = nodes.length; i < n; i++) {
+                    if (i) {
+                        if (nodeEndIsOnSameLineAsNodeStart(nodes[i - 1], nodes[i])) {
+                            write(", ");
+                        }
+                        else {
+                            write(",");
+                            writeLine();
+                        }
+                    }
+                    emit(nodes[i]);
+                }
+                if (nodes.hasTrailingComma && allowTrailingComma) {
+                    write(",");
+                }
+                decreaseIndent();
+                if (nodeEndPositionsAreOnSameLine(parent, ts.lastOrUndefined(nodes))) {
+                    if (spacesBetweenBraces) {
+                        write(" ");
+                    }
+                }
+                else {
+                    writeLine();
+                }
+            }
+            function emitList(nodes, start, count, multiLine, trailingComma, leadingComma, noTrailingNewLine, emitNode) {
+                if (!emitNode) {
+                    emitNode = emit;
+                }
+                for (var i = 0; i < count; i++) {
+                    if (multiLine) {
+                        if (i || leadingComma) {
+                            write(",");
+                        }
+                        writeLine();
+                    }
+                    else {
+                        if (i || leadingComma) {
+                            write(", ");
+                        }
+                    }
+                    var node = nodes[start + i];
+                    emitTrailingCommentsOfPosition(node.pos);
+                    emitNode(node);
+                    leadingComma = true;
+                }
+                if (trailingComma) {
+                    write(",");
+                }
+                if (multiLine && !noTrailingNewLine) {
+                    writeLine();
+                }
+                return count;
+            }
+            function emitCommaList(nodes) {
+                if (nodes) {
+                    emitList(nodes, 0, nodes.length, false, false);
+                }
+            }
+            function emitLines(nodes) {
+                emitLinesStartingAt(nodes, 0);
+            }
+            function emitLinesStartingAt(nodes, startIndex) {
+                for (var i = startIndex; i < nodes.length; i++) {
+                    writeLine();
+                    emit(nodes[i]);
+                }
+            }
+            function isBinaryOrOctalIntegerLiteral(node, text) {
+                if (node.kind === 8 && text.length > 1) {
+                    switch (text.charCodeAt(1)) {
+                        case 98:
+                        case 66:
+                        case 111:
+                        case 79:
+                            return true;
+                    }
+                }
+                return false;
+            }
+            function emitLiteral(node) {
+                var text = getLiteralText(node);
+                if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap) && (node.kind === 9 || ts.isTemplateLiteralKind(node.kind))) {
+                    writer.writeLiteral(text);
+                }
+                else if (languageVersion < 2 && isBinaryOrOctalIntegerLiteral(node, text)) {
+                    write(node.text);
+                }
+                else {
+                    write(text);
+                }
+            }
+            function getLiteralText(node) {
+                if (languageVersion < 2 && (ts.isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) {
+                    return getQuotedEscapedLiteralText('"', node.text, '"');
+                }
+                if (node.parent) {
+                    return ts.getTextOfNodeFromSourceText(currentText, node);
+                }
+                switch (node.kind) {
+                    case 9:
+                        return getQuotedEscapedLiteralText('"', node.text, '"');
+                    case 11:
+                        return getQuotedEscapedLiteralText("`", node.text, "`");
+                    case 12:
+                        return getQuotedEscapedLiteralText("`", node.text, "${");
+                    case 13:
+                        return getQuotedEscapedLiteralText("}", node.text, "${");
+                    case 14:
+                        return getQuotedEscapedLiteralText("}", node.text, "`");
+                    case 8:
+                        return node.text;
+                }
+                ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
+            }
+            function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) {
+                return leftQuote + ts.escapeNonAsciiCharacters(ts.escapeString(text)) + rightQuote;
+            }
+            function emitDownlevelRawTemplateLiteral(node) {
+                var text = ts.getTextOfNodeFromSourceText(currentText, node);
+                var isLast = node.kind === 11 || node.kind === 14;
+                text = text.substring(1, text.length - (isLast ? 1 : 2));
+                text = text.replace(/\r\n?/g, "\n");
+                text = ts.escapeString(text);
+                write("\"" + text + "\"");
+            }
+            function emitDownlevelTaggedTemplateArray(node, literalEmitter) {
+                write("[");
+                if (node.template.kind === 11) {
+                    literalEmitter(node.template);
+                }
+                else {
+                    literalEmitter(node.template.head);
+                    ts.forEach(node.template.templateSpans, function (child) {
+                        write(", ");
+                        literalEmitter(child.literal);
+                    });
+                }
+                write("]");
+            }
+            function emitDownlevelTaggedTemplate(node) {
+                var tempVariable = createAndRecordTempVariable(0);
+                write("(");
+                emit(tempVariable);
+                write(" = ");
+                emitDownlevelTaggedTemplateArray(node, emit);
+                write(", ");
+                emit(tempVariable);
+                write(".raw = ");
+                emitDownlevelTaggedTemplateArray(node, emitDownlevelRawTemplateLiteral);
+                write(", ");
+                emitParenthesizedIf(node.tag, needsParenthesisForPropertyAccessOrInvocation(node.tag));
+                write("(");
+                emit(tempVariable);
+                if (node.template.kind === 189) {
+                    ts.forEach(node.template.templateSpans, function (templateSpan) {
+                        write(", ");
+                        var needsParens = templateSpan.expression.kind === 187
+                            && templateSpan.expression.operatorToken.kind === 24;
+                        emitParenthesizedIf(templateSpan.expression, needsParens);
+                    });
+                }
+                write("))");
+            }
+            function emitTemplateExpression(node) {
+                if (languageVersion >= 2) {
+                    ts.forEachChild(node, emit);
+                    return;
+                }
+                var emitOuterParens = ts.isExpression(node.parent)
+                    && templateNeedsParens(node, node.parent);
+                if (emitOuterParens) {
+                    write("(");
+                }
+                var headEmitted = false;
+                if (shouldEmitTemplateHead()) {
+                    emitLiteral(node.head);
+                    headEmitted = true;
+                }
+                for (var i = 0, n = node.templateSpans.length; i < n; i++) {
+                    var templateSpan = node.templateSpans[i];
+                    var needsParens = templateSpan.expression.kind !== 178
+                        && comparePrecedenceToBinaryPlus(templateSpan.expression) !== 1;
+                    if (i > 0 || headEmitted) {
+                        write(" + ");
+                    }
+                    emitParenthesizedIf(templateSpan.expression, needsParens);
+                    if (templateSpan.literal.text.length !== 0) {
+                        write(" + ");
+                        emitLiteral(templateSpan.literal);
+                    }
+                }
+                if (emitOuterParens) {
+                    write(")");
+                }
+                function shouldEmitTemplateHead() {
+                    ts.Debug.assert(node.templateSpans.length !== 0);
+                    return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0;
+                }
+                function templateNeedsParens(template, parent) {
+                    switch (parent.kind) {
+                        case 174:
+                        case 175:
+                            return parent.expression === template;
+                        case 176:
+                        case 178:
+                            return false;
+                        default:
+                            return comparePrecedenceToBinaryPlus(parent) !== -1;
+                    }
+                }
+                function comparePrecedenceToBinaryPlus(expression) {
+                    switch (expression.kind) {
+                        case 187:
+                            switch (expression.operatorToken.kind) {
+                                case 37:
+                                case 39:
+                                case 40:
+                                    return 1;
+                                case 35:
+                                case 36:
+                                    return 0;
+                                default:
+                                    return -1;
+                            }
+                        case 190:
+                        case 188:
+                            return -1;
+                        default:
+                            return 1;
+                    }
+                }
+            }
+            function emitTemplateSpan(span) {
+                emit(span.expression);
+                emit(span.literal);
+            }
+            function jsxEmitReact(node) {
+                function emitTagName(name) {
+                    if (name.kind === 69 && ts.isIntrinsicJsxName(name.text)) {
+                        write('"');
+                        emit(name);
+                        write('"');
+                    }
+                    else {
+                        emit(name);
+                    }
+                }
+                function emitAttributeName(name) {
+                    if (/^[A-Za-z_]\w*$/.test(name.text)) {
+                        emit(name);
+                    }
+                    else {
+                        write('"');
+                        emit(name);
+                        write('"');
+                    }
+                }
+                function emitJsxAttribute(node) {
+                    emitAttributeName(node.name);
+                    write(": ");
+                    if (node.initializer) {
+                        emit(node.initializer);
+                    }
+                    else {
+                        write("true");
+                    }
+                }
+                function emitJsxElement(openingNode, children) {
+                    var syntheticReactRef = ts.createSynthesizedNode(69);
+                    syntheticReactRef.text = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
+                    syntheticReactRef.parent = openingNode;
+                    emitLeadingComments(openingNode);
+                    emitExpressionIdentifier(syntheticReactRef);
+                    write(".createElement(");
+                    emitTagName(openingNode.tagName);
+                    write(", ");
+                    if (openingNode.attributes.length === 0) {
+                        write("null");
+                    }
+                    else {
+                        var attrs = openingNode.attributes;
+                        if (ts.forEach(attrs, function (attr) { return attr.kind === 247; })) {
+                            write("__assign(");
+                            var haveOpenedObjectLiteral = false;
+                            for (var i = 0; i < attrs.length; i++) {
+                                if (attrs[i].kind === 247) {
+                                    if (i === 0) {
+                                        write("{}, ");
+                                    }
+                                    if (haveOpenedObjectLiteral) {
+                                        write("}");
+                                        haveOpenedObjectLiteral = false;
+                                    }
+                                    if (i > 0) {
+                                        write(", ");
+                                    }
+                                    emit(attrs[i].expression);
+                                }
+                                else {
+                                    ts.Debug.assert(attrs[i].kind === 246);
+                                    if (haveOpenedObjectLiteral) {
+                                        write(", ");
+                                    }
+                                    else {
+                                        haveOpenedObjectLiteral = true;
+                                        if (i > 0) {
+                                            write(", ");
+                                        }
+                                        write("{");
+                                    }
+                                    emitJsxAttribute(attrs[i]);
+                                }
+                            }
+                            if (haveOpenedObjectLiteral)
+                                write("}");
+                            write(")");
+                        }
+                        else {
+                            write("{");
+                            for (var i = 0, n = attrs.length; i < n; i++) {
+                                if (i > 0) {
+                                    write(", ");
+                                }
+                                emitJsxAttribute(attrs[i]);
+                            }
+                            write("}");
+                        }
+                    }
+                    if (children) {
+                        var firstChild = void 0;
+                        var multipleEmittableChildren = false;
+                        for (var i = 0, n = children.length; i < n; i++) {
+                            var jsxChild = children[i];
+                            if (isJsxChildEmittable(jsxChild)) {
+                                if (!firstChild) {
+                                    write(", ");
+                                    firstChild = jsxChild;
+                                }
+                                else {
+                                    if (!multipleEmittableChildren) {
+                                        multipleEmittableChildren = true;
+                                        increaseIndent();
+                                        writeLine();
+                                        emit(firstChild);
+                                    }
+                                    write(", ");
+                                    writeLine();
+                                    emit(jsxChild);
+                                }
+                            }
+                        }
+                        if (multipleEmittableChildren) {
+                            decreaseIndent();
+                        }
+                        else if (firstChild) {
+                            if (firstChild.kind !== 241 && firstChild.kind !== 242) {
+                                emit(firstChild);
+                            }
+                            else {
+                                increaseIndent();
+                                writeLine();
+                                emit(firstChild);
+                                writeLine();
+                                decreaseIndent();
+                            }
+                        }
+                    }
+                    write(")");
+                    emitTrailingComments(openingNode);
+                }
+                if (node.kind === 241) {
+                    emitJsxElement(node.openingElement, node.children);
+                }
+                else {
+                    ts.Debug.assert(node.kind === 242);
+                    emitJsxElement(node);
+                }
+            }
+            function jsxEmitPreserve(node) {
+                function emitJsxAttribute(node) {
+                    emit(node.name);
+                    if (node.initializer) {
+                        write("=");
+                        emit(node.initializer);
+                    }
+                }
+                function emitJsxSpreadAttribute(node) {
+                    write("{...");
+                    emit(node.expression);
+                    write("}");
+                }
+                function emitAttributes(attribs) {
+                    for (var i = 0, n = attribs.length; i < n; i++) {
+                        if (i > 0) {
+                            write(" ");
+                        }
+                        if (attribs[i].kind === 247) {
+                            emitJsxSpreadAttribute(attribs[i]);
+                        }
+                        else {
+                            ts.Debug.assert(attribs[i].kind === 246);
+                            emitJsxAttribute(attribs[i]);
+                        }
+                    }
+                }
+                function emitJsxOpeningOrSelfClosingElement(node) {
+                    write("<");
+                    emit(node.tagName);
+                    if (node.attributes.length > 0 || (node.kind === 242)) {
+                        write(" ");
+                    }
+                    emitAttributes(node.attributes);
+                    if (node.kind === 242) {
+                        write("/>");
+                    }
+                    else {
+                        write(">");
+                    }
+                }
+                function emitJsxClosingElement(node) {
+                    write("</");
+                    emit(node.tagName);
+                    write(">");
+                }
+                function emitJsxElement(node) {
+                    emitJsxOpeningOrSelfClosingElement(node.openingElement);
+                    for (var i = 0, n = node.children.length; i < n; i++) {
+                        emit(node.children[i]);
+                    }
+                    emitJsxClosingElement(node.closingElement);
+                }
+                if (node.kind === 241) {
+                    emitJsxElement(node);
+                }
+                else {
+                    ts.Debug.assert(node.kind === 242);
+                    emitJsxOpeningOrSelfClosingElement(node);
+                }
+            }
+            function emitExpressionForPropertyName(node) {
+                ts.Debug.assert(node.kind !== 169);
+                if (node.kind === 9) {
+                    emitLiteral(node);
+                }
+                else if (node.kind === 140) {
+                    if (ts.nodeIsDecorated(node.parent)) {
+                        if (!computedPropertyNamesToGeneratedNames) {
+                            computedPropertyNamesToGeneratedNames = [];
+                        }
+                        var generatedName = computedPropertyNamesToGeneratedNames[ts.getNodeId(node)];
+                        if (generatedName) {
+                            write(generatedName);
+                            return;
+                        }
+                        generatedName = createAndRecordTempVariable(0).text;
+                        computedPropertyNamesToGeneratedNames[ts.getNodeId(node)] = generatedName;
+                        write(generatedName);
+                        write(" = ");
+                    }
+                    emit(node.expression);
+                }
+                else {
+                    write('"');
+                    if (node.kind === 8) {
+                        write(node.text);
+                    }
+                    else {
+                        writeTextOfNode(currentText, node);
+                    }
+                    write('"');
+                }
+            }
+            function isExpressionIdentifier(node) {
+                var parent = node.parent;
+                switch (parent.kind) {
+                    case 170:
+                    case 195:
+                    case 184:
+                    case 187:
+                    case 174:
+                    case 249:
+                    case 140:
+                    case 188:
+                    case 143:
+                    case 181:
+                    case 204:
+                    case 173:
+                    case 235:
+                    case 202:
+                    case 194:
+                    case 206:
+                    case 207:
+                    case 208:
+                    case 203:
+                    case 245:
+                    case 242:
+                    case 243:
+                    case 247:
+                    case 248:
+                    case 175:
+                    case 196:
+                    case 178:
+                    case 186:
+                    case 185:
+                    case 211:
+                    case 254:
+                    case 191:
+                    case 213:
+                    case 176:
+                    case 197:
+                    case 215:
+                    case 177:
+                    case 182:
+                    case 183:
+                    case 205:
+                    case 212:
+                    case 190:
+                        return true;
+                    case 169:
+                    case 255:
+                    case 142:
+                    case 253:
+                    case 145:
+                    case 218:
+                        return parent.initializer === node;
+                    case 172:
+                        return parent.expression === node;
+                    case 180:
+                    case 179:
+                        return parent.body === node;
+                    case 229:
+                        return parent.moduleReference === node;
+                    case 139:
+                        return parent.left === node;
+                }
+                return false;
+            }
+            function emitExpressionIdentifier(node) {
+                var container = resolver.getReferencedExportContainer(node);
+                if (container) {
+                    if (container.kind === 256) {
+                        if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
+                            write("exports.");
+                        }
+                    }
+                    else {
+                        write(getGeneratedNameForNode(container));
+                        write(".");
+                    }
+                }
+                else {
+                    if (modulekind !== ts.ModuleKind.ES6) {
+                        var declaration = resolver.getReferencedImportDeclaration(node);
+                        if (declaration) {
+                            if (declaration.kind === 231) {
+                                write(getGeneratedNameForNode(declaration.parent));
+                                write(languageVersion === 0 ? '["default"]' : ".default");
+                                return;
+                            }
+                            else if (declaration.kind === 234) {
+                                write(getGeneratedNameForNode(declaration.parent.parent.parent));
+                                var name_26 = declaration.propertyName || declaration.name;
+                                var identifier = ts.getTextOfNodeFromSourceText(currentText, name_26);
+                                if (languageVersion === 0 && identifier === "default") {
+                                    write('["default"]');
+                                }
+                                else {
+                                    write(".");
+                                    write(identifier);
+                                }
+                                return;
+                            }
+                        }
+                    }
+                    if (languageVersion < 2) {
+                        var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
+                        if (declaration) {
+                            write(getGeneratedNameForNode(declaration.name));
+                            return;
+                        }
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & 1048576) {
+                        var declaration = resolver.getReferencedValueDeclaration(node);
+                        if (declaration) {
+                            var classAlias = decoratedClassAliases[ts.getNodeId(declaration)];
+                            if (classAlias !== undefined) {
+                                write(classAlias);
+                                return;
+                            }
+                        }
+                    }
+                }
+                if (ts.nodeIsSynthesized(node)) {
+                    write(node.text);
+                }
+                else {
+                    writeTextOfNode(currentText, node);
+                }
+            }
+            function isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node) {
+                if (languageVersion < 2) {
+                    var parent_13 = node.parent;
+                    switch (parent_13.kind) {
+                        case 169:
+                        case 221:
+                        case 224:
+                        case 218:
+                            return parent_13.name === node && resolver.isDeclarationWithCollidingName(parent_13);
+                    }
+                }
+                return false;
+            }
+            function emitIdentifier(node) {
+                if (convertedLoopState) {
+                    if (node.text == "arguments" && resolver.isArgumentsLocalBinding(node)) {
+                        var name_27 = convertedLoopState.argumentsName || (convertedLoopState.argumentsName = makeUniqueName("arguments"));
+                        write(name_27);
+                        return;
+                    }
+                }
+                if (!node.parent) {
+                    write(node.text);
+                }
+                else if (isExpressionIdentifier(node)) {
+                    emitExpressionIdentifier(node);
+                }
+                else if (isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node)) {
+                    write(getGeneratedNameForNode(node));
+                }
+                else if (ts.nodeIsSynthesized(node)) {
+                    write(node.text);
+                }
+                else {
+                    writeTextOfNode(currentText, node);
+                }
+            }
+            function emitThis(node) {
+                if (resolver.getNodeCheckFlags(node) & 2) {
+                    write("_this");
+                }
+                else if (convertedLoopState) {
+                    write(convertedLoopState.thisName || (convertedLoopState.thisName = makeUniqueName("this")));
+                }
+                else {
+                    write("this");
+                }
+            }
+            function emitSuper(node) {
+                if (languageVersion >= 2) {
+                    write("super");
+                }
+                else {
+                    var flags = resolver.getNodeCheckFlags(node);
+                    if (flags & 256) {
+                        write("_super.prototype");
+                    }
+                    else {
+                        write("_super");
+                    }
+                }
+            }
+            function emitObjectBindingPattern(node) {
+                write("{ ");
+                var elements = node.elements;
+                emitList(elements, 0, elements.length, false, elements.hasTrailingComma);
+                write(" }");
+            }
+            function emitArrayBindingPattern(node) {
+                write("[");
+                var elements = node.elements;
+                emitList(elements, 0, elements.length, false, elements.hasTrailingComma);
+                write("]");
+            }
+            function emitBindingElement(node) {
+                if (node.propertyName) {
+                    emit(node.propertyName);
+                    write(": ");
+                }
+                if (node.dotDotDotToken) {
+                    write("...");
+                }
+                if (ts.isBindingPattern(node.name)) {
+                    emit(node.name);
+                }
+                else {
+                    emitModuleMemberName(node);
+                }
+                emitOptional(" = ", node.initializer);
+            }
+            function emitSpreadElementExpression(node) {
+                write("...");
+                emit(node.expression);
+            }
+            function emitYieldExpression(node) {
+                write(ts.tokenToString(114));
+                if (node.asteriskToken) {
+                    write("*");
+                }
+                if (node.expression) {
+                    write(" ");
+                    emit(node.expression);
+                }
+            }
+            function emitAwaitExpression(node) {
+                var needsParenthesis = needsParenthesisForAwaitExpressionAsYield(node);
+                if (needsParenthesis) {
+                    write("(");
+                }
+                write(ts.tokenToString(114));
+                write(" ");
+                emit(node.expression);
+                if (needsParenthesis) {
+                    write(")");
+                }
+            }
+            function needsParenthesisForAwaitExpressionAsYield(node) {
+                if (node.parent.kind === 187 && !ts.isAssignmentOperator(node.parent.operatorToken.kind)) {
+                    return true;
+                }
+                else if (node.parent.kind === 188 && node.parent.condition === node) {
+                    return true;
+                }
+                return false;
+            }
+            function needsParenthesisForPropertyAccessOrInvocation(node) {
+                switch (node.kind) {
+                    case 69:
+                    case 170:
+                    case 172:
+                    case 173:
+                    case 174:
+                    case 178:
+                        return false;
+                }
+                return true;
+            }
+            function emitListWithSpread(elements, needsUniqueCopy, multiLine, trailingComma, useConcat) {
+                var pos = 0;
+                var group = 0;
+                var length = elements.length;
+                while (pos < length) {
+                    if (group === 1 && useConcat) {
+                        write(".concat(");
+                    }
+                    else if (group > 0) {
+                        write(", ");
+                    }
+                    var e = elements[pos];
+                    if (e.kind === 191) {
+                        e = e.expression;
+                        emitParenthesizedIf(e, group === 0 && needsParenthesisForPropertyAccessOrInvocation(e));
+                        pos++;
+                        if (pos === length && group === 0 && needsUniqueCopy && e.kind !== 170) {
+                            write(".slice()");
+                        }
+                    }
+                    else {
+                        var i = pos;
+                        while (i < length && elements[i].kind !== 191) {
+                            i++;
+                        }
+                        write("[");
+                        if (multiLine) {
+                            increaseIndent();
+                        }
+                        emitList(elements, pos, i - pos, multiLine, trailingComma && i === length);
+                        if (multiLine) {
+                            decreaseIndent();
+                        }
+                        write("]");
+                        pos = i;
+                    }
+                    group++;
+                }
+                if (group > 1) {
+                    if (useConcat) {
+                        write(")");
+                    }
+                }
+            }
+            function isSpreadElementExpression(node) {
+                return node.kind === 191;
+            }
+            function emitArrayLiteral(node) {
+                var elements = node.elements;
+                if (elements.length === 0) {
+                    write("[]");
+                }
+                else if (languageVersion >= 2 || !ts.forEach(elements, isSpreadElementExpression)) {
+                    write("[");
+                    emitLinePreservingList(node, node.elements, elements.hasTrailingComma, false);
+                    write("]");
+                }
+                else {
+                    emitListWithSpread(elements, true, node.multiLine, elements.hasTrailingComma, true);
+                }
+            }
+            function emitObjectLiteralBody(node, numElements) {
+                if (numElements === 0) {
+                    write("{}");
+                    return;
+                }
+                write("{");
+                if (numElements > 0) {
+                    var properties = node.properties;
+                    if (numElements === properties.length) {
+                        emitLinePreservingList(node, properties, languageVersion >= 1, true);
+                    }
+                    else {
+                        var multiLine = node.multiLine;
+                        if (!multiLine) {
+                            write(" ");
+                        }
+                        else {
+                            increaseIndent();
+                        }
+                        emitList(properties, 0, numElements, multiLine, false);
+                        if (!multiLine) {
+                            write(" ");
+                        }
+                        else {
+                            decreaseIndent();
+                        }
+                    }
+                }
+                write("}");
+            }
+            function emitDownlevelObjectLiteralWithComputedProperties(node, firstComputedPropertyIndex) {
+                var multiLine = node.multiLine;
+                var properties = node.properties;
+                write("(");
+                if (multiLine) {
+                    increaseIndent();
+                }
+                var tempVar = createAndRecordTempVariable(0);
+                emit(tempVar);
+                write(" = ");
+                emitObjectLiteralBody(node, firstComputedPropertyIndex);
+                for (var i = firstComputedPropertyIndex, n = properties.length; i < n; i++) {
+                    writeComma();
+                    var property = properties[i];
+                    emitStart(property);
+                    if (property.kind === 149 || property.kind === 150) {
+                        var accessors = ts.getAllAccessorDeclarations(node.properties, property);
+                        if (property !== accessors.firstAccessor) {
+                            continue;
+                        }
+                        write("Object.defineProperty(");
+                        emit(tempVar);
+                        write(", ");
+                        emitStart(property.name);
+                        emitExpressionForPropertyName(property.name);
+                        emitEnd(property.name);
+                        write(", {");
+                        increaseIndent();
+                        if (accessors.getAccessor) {
+                            writeLine();
+                            emitLeadingComments(accessors.getAccessor);
+                            write("get: ");
+                            emitStart(accessors.getAccessor);
+                            write("function ");
+                            emitSignatureAndBody(accessors.getAccessor);
+                            emitEnd(accessors.getAccessor);
+                            emitTrailingComments(accessors.getAccessor);
+                            write(",");
+                        }
+                        if (accessors.setAccessor) {
+                            writeLine();
+                            emitLeadingComments(accessors.setAccessor);
+                            write("set: ");
+                            emitStart(accessors.setAccessor);
+                            write("function ");
+                            emitSignatureAndBody(accessors.setAccessor);
+                            emitEnd(accessors.setAccessor);
+                            emitTrailingComments(accessors.setAccessor);
+                            write(",");
+                        }
+                        writeLine();
+                        write("enumerable: true,");
+                        writeLine();
+                        write("configurable: true");
+                        decreaseIndent();
+                        writeLine();
+                        write("})");
+                        emitEnd(property);
+                    }
+                    else {
+                        emitLeadingComments(property);
+                        emitStart(property.name);
+                        emit(tempVar);
+                        emitMemberAccessForPropertyName(property.name);
+                        emitEnd(property.name);
+                        write(" = ");
+                        if (property.kind === 253) {
+                            emit(property.initializer);
+                        }
+                        else if (property.kind === 254) {
+                            emitExpressionIdentifier(property.name);
+                        }
+                        else if (property.kind === 147) {
+                            emitFunctionDeclaration(property);
+                        }
+                        else {
+                            ts.Debug.fail("ObjectLiteralElement type not accounted for: " + property.kind);
+                        }
+                    }
+                    emitEnd(property);
+                }
+                writeComma();
+                emit(tempVar);
+                if (multiLine) {
+                    decreaseIndent();
+                    writeLine();
+                }
+                write(")");
+                function writeComma() {
+                    if (multiLine) {
+                        write(",");
+                        writeLine();
+                    }
+                    else {
+                        write(", ");
+                    }
+                }
+            }
+            function emitObjectLiteral(node) {
+                var properties = node.properties;
+                if (languageVersion < 2) {
+                    var numProperties = properties.length;
+                    var numInitialNonComputedProperties = numProperties;
+                    for (var i = 0, n = properties.length; i < n; i++) {
+                        if (properties[i].name.kind === 140) {
+                            numInitialNonComputedProperties = i;
+                            break;
+                        }
+                    }
+                    var hasComputedProperty = numInitialNonComputedProperties !== properties.length;
+                    if (hasComputedProperty) {
+                        emitDownlevelObjectLiteralWithComputedProperties(node, numInitialNonComputedProperties);
+                        return;
+                    }
+                }
+                emitObjectLiteralBody(node, properties.length);
+            }
+            function createBinaryExpression(left, operator, right, startsOnNewLine) {
+                var result = ts.createSynthesizedNode(187, startsOnNewLine);
+                result.operatorToken = ts.createSynthesizedNode(operator);
+                result.left = left;
+                result.right = right;
+                return result;
+            }
+            function createPropertyAccessExpression(expression, name) {
+                var result = ts.createSynthesizedNode(172);
+                result.expression = parenthesizeForAccess(expression);
+                result.dotToken = ts.createSynthesizedNode(21);
+                result.name = name;
+                return result;
+            }
+            function createElementAccessExpression(expression, argumentExpression) {
+                var result = ts.createSynthesizedNode(173);
+                result.expression = parenthesizeForAccess(expression);
+                result.argumentExpression = argumentExpression;
+                return result;
+            }
+            function parenthesizeForAccess(expr) {
+                while (expr.kind === 177 ||
+                    expr.kind === 195 ||
+                    expr.kind === 196) {
+                    expr = expr.expression;
+                }
+                if (ts.isLeftHandSideExpression(expr) &&
+                    expr.kind !== 175 &&
+                    expr.kind !== 8) {
+                    return expr;
+                }
+                var node = ts.createSynthesizedNode(178);
+                node.expression = expr;
+                return node;
+            }
+            function emitComputedPropertyName(node) {
+                write("[");
+                emitExpressionForPropertyName(node);
+                write("]");
+            }
+            function emitMethod(node) {
+                if (languageVersion >= 2 && node.asteriskToken) {
+                    write("*");
+                }
+                emit(node.name);
+                if (languageVersion < 2) {
+                    write(": function ");
+                }
+                emitSignatureAndBody(node);
+            }
+            function emitPropertyAssignment(node) {
+                emit(node.name);
+                write(": ");
+                emitTrailingCommentsOfPosition(node.initializer.pos);
+                emit(node.initializer);
+            }
+            function isNamespaceExportReference(node) {
+                var container = resolver.getReferencedExportContainer(node);
+                return container && container.kind !== 256;
+            }
+            function isImportedReference(node) {
+                var declaration = resolver.getReferencedImportDeclaration(node);
+                return declaration && (declaration.kind === 231 || declaration.kind === 234);
+            }
+            function emitShorthandPropertyAssignment(node) {
+                writeTextOfNode(currentText, node.name);
+                if (languageVersion < 2 || (modulekind !== ts.ModuleKind.ES6 && isImportedReference(node.name)) || isNamespaceExportReference(node.name)) {
+                    write(": ");
+                    emit(node.name);
+                }
+                if (languageVersion >= 2 && node.objectAssignmentInitializer) {
+                    write(" = ");
+                    emit(node.objectAssignmentInitializer);
+                }
+            }
+            function tryEmitConstantValue(node) {
+                var constantValue = tryGetConstEnumValue(node);
+                if (constantValue !== undefined) {
+                    write(constantValue.toString());
+                    if (!compilerOptions.removeComments) {
+                        var propertyName = node.kind === 172 ? ts.declarationNameToString(node.name) : ts.getTextOfNode(node.argumentExpression);
+                        write(" /* " + propertyName + " */");
+                    }
+                    return true;
+                }
+                return false;
+            }
+            function tryGetConstEnumValue(node) {
+                if (compilerOptions.isolatedModules) {
+                    return undefined;
+                }
+                return node.kind === 172 || node.kind === 173
+                    ? resolver.getConstantValue(node)
+                    : undefined;
+            }
+            function indentIfOnDifferentLines(parent, node1, node2, valueToWriteWhenNotIndenting) {
+                var realNodesAreOnDifferentLines = !ts.nodeIsSynthesized(parent) && !nodeEndIsOnSameLineAsNodeStart(node1, node2);
+                var synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2);
+                if (realNodesAreOnDifferentLines || synthesizedNodeIsOnDifferentLine) {
+                    increaseIndent();
+                    writeLine();
+                    return true;
+                }
+                else {
+                    if (valueToWriteWhenNotIndenting) {
+                        write(valueToWriteWhenNotIndenting);
+                    }
+                    return false;
+                }
+            }
+            function emitPropertyAccess(node) {
+                if (tryEmitConstantValue(node)) {
+                    return;
+                }
+                if (languageVersion === 2 &&
+                    node.expression.kind === 95 &&
+                    isInAsyncMethodWithSuperInES6(node)) {
+                    var name_28 = ts.createSynthesizedNode(9);
+                    name_28.text = node.name.text;
+                    emitSuperAccessInAsyncMethod(node.expression, name_28);
+                    return;
+                }
+                emit(node.expression);
+                var indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, node.dotToken);
+                var shouldEmitSpace = false;
+                if (!indentedBeforeDot) {
+                    if (node.expression.kind === 8) {
+                        var text = ts.getTextOfNodeFromSourceText(currentText, node.expression);
+                        shouldEmitSpace = text.indexOf(ts.tokenToString(21)) < 0;
+                    }
+                    else {
+                        var constantValue = tryGetConstEnumValue(node.expression);
+                        shouldEmitSpace = isFinite(constantValue) && Math.floor(constantValue) === constantValue;
+                    }
+                }
+                if (shouldEmitSpace) {
+                    write(" .");
+                }
+                else {
+                    write(".");
+                }
+                var indentedAfterDot = indentIfOnDifferentLines(node, node.dotToken, node.name);
+                emit(node.name);
+                decreaseIndentIf(indentedBeforeDot, indentedAfterDot);
+            }
+            function emitQualifiedName(node) {
+                emit(node.left);
+                write(".");
+                emit(node.right);
+            }
+            function emitQualifiedNameAsExpression(node, useFallback) {
+                if (node.left.kind === 69) {
+                    emitEntityNameAsExpression(node.left, useFallback);
+                }
+                else if (useFallback) {
+                    var temp = createAndRecordTempVariable(0);
+                    write("(");
+                    emitNodeWithoutSourceMap(temp);
+                    write(" = ");
+                    emitEntityNameAsExpression(node.left, true);
+                    write(") && ");
+                    emitNodeWithoutSourceMap(temp);
+                }
+                else {
+                    emitEntityNameAsExpression(node.left, false);
+                }
+                write(".");
+                emit(node.right);
+            }
+            function emitEntityNameAsExpression(node, useFallback) {
+                switch (node.kind) {
+                    case 69:
+                        if (useFallback) {
+                            write("typeof ");
+                            emitExpressionIdentifier(node);
+                            write(" !== 'undefined' && ");
+                        }
+                        emitExpressionIdentifier(node);
+                        break;
+                    case 139:
+                        emitQualifiedNameAsExpression(node, useFallback);
+                        break;
+                    default:
+                        emitNodeWithoutSourceMap(node);
+                        break;
+                }
+            }
+            function emitIndexedAccess(node) {
+                if (tryEmitConstantValue(node)) {
+                    return;
+                }
+                if (languageVersion === 2 &&
+                    node.expression.kind === 95 &&
+                    isInAsyncMethodWithSuperInES6(node)) {
+                    emitSuperAccessInAsyncMethod(node.expression, node.argumentExpression);
+                    return;
+                }
+                emit(node.expression);
+                write("[");
+                emit(node.argumentExpression);
+                write("]");
+            }
+            function hasSpreadElement(elements) {
+                return ts.forEach(elements, function (e) { return e.kind === 191; });
+            }
+            function skipParentheses(node) {
+                while (node.kind === 178 ||
+                    node.kind === 177 ||
+                    node.kind === 195 ||
+                    node.kind === 196) {
+                    node = node.expression;
+                }
+                return node;
+            }
+            function emitCallTarget(node) {
+                if (node.kind === 69 || node.kind === 97 || node.kind === 95) {
+                    emit(node);
+                    return node;
+                }
+                var temp = createAndRecordTempVariable(0);
+                write("(");
+                emit(temp);
+                write(" = ");
+                emit(node);
+                write(")");
+                return temp;
+            }
+            function emitCallWithSpread(node) {
+                var target;
+                var expr = skipParentheses(node.expression);
+                if (expr.kind === 172) {
+                    target = emitCallTarget(expr.expression);
+                    write(".");
+                    emit(expr.name);
+                }
+                else if (expr.kind === 173) {
+                    target = emitCallTarget(expr.expression);
+                    write("[");
+                    emit(expr.argumentExpression);
+                    write("]");
+                }
+                else if (expr.kind === 95) {
+                    target = expr;
+                    write("_super");
+                }
+                else {
+                    emit(node.expression);
+                }
+                write(".apply(");
+                if (target) {
+                    if (target.kind === 95) {
+                        emitThis(target);
+                    }
+                    else {
+                        emit(target);
+                    }
+                }
+                else {
+                    write("void 0");
+                }
+                write(", ");
+                emitListWithSpread(node.arguments, false, false, false, true);
+                write(")");
+            }
+            function isInAsyncMethodWithSuperInES6(node) {
+                if (languageVersion === 2) {
+                    var container = ts.getSuperContainer(node, false);
+                    if (container && resolver.getNodeCheckFlags(container) & (2048 | 4096)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function emitSuperAccessInAsyncMethod(superNode, argumentExpression) {
+                var container = ts.getSuperContainer(superNode, false);
+                var isSuperBinding = resolver.getNodeCheckFlags(container) & 4096;
+                write("_super(");
+                emit(argumentExpression);
+                write(isSuperBinding ? ").value" : ")");
+            }
+            function emitCallExpression(node) {
+                if (languageVersion < 2 && hasSpreadElement(node.arguments)) {
+                    emitCallWithSpread(node);
+                    return;
+                }
+                var expression = node.expression;
+                var superCall = false;
+                var isAsyncMethodWithSuper = false;
+                if (expression.kind === 95) {
+                    emitSuper(expression);
+                    superCall = true;
+                }
+                else {
+                    superCall = ts.isSuperPropertyOrElementAccess(expression);
+                    isAsyncMethodWithSuper = superCall && isInAsyncMethodWithSuperInES6(node);
+                    emit(expression);
+                }
+                if (superCall && (languageVersion < 2 || isAsyncMethodWithSuper)) {
+                    write(".call(");
+                    emitThis(expression);
+                    if (node.arguments.length) {
+                        write(", ");
+                        emitCommaList(node.arguments);
+                    }
+                    write(")");
+                }
+                else {
+                    write("(");
+                    emitCommaList(node.arguments);
+                    write(")");
+                }
+            }
+            function emitNewExpression(node) {
+                write("new ");
+                if (languageVersion === 1 &&
+                    node.arguments &&
+                    hasSpreadElement(node.arguments)) {
+                    write("(");
+                    var target = emitCallTarget(node.expression);
+                    write(".bind.apply(");
+                    emit(target);
+                    write(", [void 0].concat(");
+                    emitListWithSpread(node.arguments, false, false, false, false);
+                    write(")))");
+                    write("()");
+                }
+                else {
+                    emit(node.expression);
+                    if (node.arguments) {
+                        write("(");
+                        emitCommaList(node.arguments);
+                        write(")");
+                    }
+                }
+            }
+            function emitTaggedTemplateExpression(node) {
+                if (languageVersion >= 2) {
+                    emit(node.tag);
+                    write(" ");
+                    emit(node.template);
+                }
+                else {
+                    emitDownlevelTaggedTemplate(node);
+                }
+            }
+            function emitParenExpression(node) {
+                if (!ts.nodeIsSynthesized(node) && node.parent.kind !== 180) {
+                    if (node.expression.kind === 177 ||
+                        node.expression.kind === 195 ||
+                        node.expression.kind === 196) {
+                        var operand = node.expression.expression;
+                        while (operand.kind === 177 ||
+                            operand.kind === 195 ||
+                            operand.kind === 196) {
+                            operand = operand.expression;
+                        }
+                        if (operand.kind !== 185 &&
+                            operand.kind !== 183 &&
+                            operand.kind !== 182 &&
+                            operand.kind !== 181 &&
+                            operand.kind !== 186 &&
+                            operand.kind !== 175 &&
+                            !(operand.kind === 174 && node.parent.kind === 175) &&
+                            !(operand.kind === 179 && node.parent.kind === 174) &&
+                            !(operand.kind === 8 && node.parent.kind === 172)) {
+                            emit(operand);
+                            return;
+                        }
+                    }
+                }
+                write("(");
+                emit(node.expression);
+                write(")");
+            }
+            function emitDeleteExpression(node) {
+                write(ts.tokenToString(78));
+                write(" ");
+                emit(node.expression);
+            }
+            function emitVoidExpression(node) {
+                write(ts.tokenToString(103));
+                write(" ");
+                emit(node.expression);
+            }
+            function emitTypeOfExpression(node) {
+                write(ts.tokenToString(101));
+                write(" ");
+                emit(node.expression);
+            }
+            function isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node) {
+                if (!isCurrentFileSystemExternalModule() || node.kind !== 69 || ts.nodeIsSynthesized(node)) {
+                    return false;
+                }
+                var isVariableDeclarationOrBindingElement = node.parent && (node.parent.kind === 218 || node.parent.kind === 169);
+                var targetDeclaration = isVariableDeclarationOrBindingElement
+                    ? node.parent
+                    : resolver.getReferencedValueDeclaration(node);
+                return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, true);
+            }
+            function isNameOfExportedDeclarationInNonES6Module(node) {
+                if (modulekind === ts.ModuleKind.System || node.kind !== 69 || ts.nodeIsSynthesized(node)) {
+                    return false;
+                }
+                return !exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, node.text);
+            }
+            function emitPrefixUnaryExpression(node) {
+                var isPlusPlusOrMinusMinus = (node.operator === 41
+                    || node.operator === 42);
+                var externalExportChanged = isPlusPlusOrMinusMinus &&
+                    isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
+                if (externalExportChanged) {
+                    write(exportFunctionForFile + "(\"");
+                    emitNodeWithoutSourceMap(node.operand);
+                    write("\", ");
+                }
+                var internalExportChanged = isPlusPlusOrMinusMinus &&
+                    isNameOfExportedDeclarationInNonES6Module(node.operand);
+                if (internalExportChanged) {
+                    emitAliasEqual(node.operand);
+                }
+                write(ts.tokenToString(node.operator));
+                if (node.operand.kind === 185) {
+                    var operand = node.operand;
+                    if (node.operator === 35 && (operand.operator === 35 || operand.operator === 41)) {
+                        write(" ");
+                    }
+                    else if (node.operator === 36 && (operand.operator === 36 || operand.operator === 42)) {
+                        write(" ");
+                    }
+                }
+                emit(node.operand);
+                if (externalExportChanged) {
+                    write(")");
+                }
+            }
+            function emitPostfixUnaryExpression(node) {
+                var externalExportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
+                var internalExportChanged = isNameOfExportedDeclarationInNonES6Module(node.operand);
+                if (externalExportChanged) {
+                    write("(" + exportFunctionForFile + "(\"");
+                    emitNodeWithoutSourceMap(node.operand);
+                    write("\", ");
+                    write(ts.tokenToString(node.operator));
+                    emit(node.operand);
+                    if (node.operator === 41) {
+                        write(") - 1)");
+                    }
+                    else {
+                        write(") + 1)");
+                    }
+                }
+                else if (internalExportChanged) {
+                    emitAliasEqual(node.operand);
+                    emit(node.operand);
+                    if (node.operator === 41) {
+                        write(" += 1");
+                    }
+                    else {
+                        write(" -= 1");
+                    }
+                }
+                else {
+                    emit(node.operand);
+                    write(ts.tokenToString(node.operator));
+                }
+            }
+            function shouldHoistDeclarationInSystemJsModule(node) {
+                return isSourceFileLevelDeclarationInSystemJsModule(node, false);
+            }
+            function isSourceFileLevelDeclarationInSystemJsModule(node, isExported) {
+                if (!node || !isCurrentFileSystemExternalModule()) {
+                    return false;
+                }
+                var current = ts.getRootDeclaration(node).parent;
+                while (current) {
+                    if (current.kind === 256) {
+                        return !isExported || ((ts.getCombinedNodeFlags(node) & 1) !== 0);
+                    }
+                    else if (ts.isDeclaration(current)) {
+                        return false;
+                    }
+                    else {
+                        current = current.parent;
+                    }
+                }
+            }
+            function emitExponentiationOperator(node) {
+                var leftHandSideExpression = node.left;
+                if (node.operatorToken.kind === 60) {
+                    var synthesizedLHS = void 0;
+                    var shouldEmitParentheses = false;
+                    if (ts.isElementAccessExpression(leftHandSideExpression)) {
+                        shouldEmitParentheses = true;
+                        write("(");
+                        synthesizedLHS = ts.createSynthesizedNode(173, false);
+                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, false, false);
+                        synthesizedLHS.expression = identifier;
+                        if (leftHandSideExpression.argumentExpression.kind !== 8 &&
+                            leftHandSideExpression.argumentExpression.kind !== 9) {
+                            var tempArgumentExpression = createAndRecordTempVariable(268435456);
+                            synthesizedLHS.argumentExpression = tempArgumentExpression;
+                            emitAssignment(tempArgumentExpression, leftHandSideExpression.argumentExpression, true, leftHandSideExpression.expression);
+                        }
+                        else {
+                            synthesizedLHS.argumentExpression = leftHandSideExpression.argumentExpression;
+                        }
+                        write(", ");
+                    }
+                    else if (ts.isPropertyAccessExpression(leftHandSideExpression)) {
+                        shouldEmitParentheses = true;
+                        write("(");
+                        synthesizedLHS = ts.createSynthesizedNode(172, false);
+                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, false, false);
+                        synthesizedLHS.expression = identifier;
+                        synthesizedLHS.dotToken = leftHandSideExpression.dotToken;
+                        synthesizedLHS.name = leftHandSideExpression.name;
+                        write(", ");
+                    }
+                    emit(synthesizedLHS || leftHandSideExpression);
+                    write(" = ");
+                    write("Math.pow(");
+                    emit(synthesizedLHS || leftHandSideExpression);
+                    write(", ");
+                    emit(node.right);
+                    write(")");
+                    if (shouldEmitParentheses) {
+                        write(")");
+                    }
+                }
+                else {
+                    write("Math.pow(");
+                    emit(leftHandSideExpression);
+                    write(", ");
+                    emit(node.right);
+                    write(")");
+                }
+            }
+            function emitAliasEqual(name) {
+                for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
+                    var specifier = _b[_a];
+                    emitStart(specifier.name);
+                    emitContainingModuleName(specifier);
+                    if (languageVersion === 0 && name.text === "default") {
+                        write('["default"]');
+                    }
+                    else {
+                        write(".");
+                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                    }
+                    emitEnd(specifier.name);
+                    write(" = ");
+                }
+                return true;
+            }
+            function emitBinaryExpression(node) {
+                if (languageVersion < 2 && node.operatorToken.kind === 56 &&
+                    (node.left.kind === 171 || node.left.kind === 170)) {
+                    emitDestructuring(node, node.parent.kind === 202);
+                }
+                else {
+                    var isAssignment = ts.isAssignmentOperator(node.operatorToken.kind);
+                    var externalExportChanged = isAssignment &&
+                        isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left);
+                    if (externalExportChanged) {
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithoutSourceMap(node.left);
+                        write("\", ");
+                    }
+                    var internalExportChanged = isAssignment &&
+                        isNameOfExportedDeclarationInNonES6Module(node.left);
+                    if (internalExportChanged) {
+                        emitAliasEqual(node.left);
+                    }
+                    if (node.operatorToken.kind === 38 || node.operatorToken.kind === 60) {
+                        emitExponentiationOperator(node);
+                    }
+                    else {
+                        emit(node.left);
+                        var indentedBeforeOperator = indentIfOnDifferentLines(node, node.left, node.operatorToken, node.operatorToken.kind !== 24 ? " " : undefined);
+                        write(ts.tokenToString(node.operatorToken.kind));
+                        var indentedAfterOperator = indentIfOnDifferentLines(node, node.operatorToken, node.right, " ");
+                        emit(node.right);
+                        decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator);
+                    }
+                    if (externalExportChanged) {
+                        write(")");
+                    }
+                }
+            }
+            function synthesizedNodeStartsOnNewLine(node) {
+                return ts.nodeIsSynthesized(node) && node.startsOnNewLine;
+            }
+            function emitConditionalExpression(node) {
+                emit(node.condition);
+                var indentedBeforeQuestion = indentIfOnDifferentLines(node, node.condition, node.questionToken, " ");
+                write("?");
+                var indentedAfterQuestion = indentIfOnDifferentLines(node, node.questionToken, node.whenTrue, " ");
+                emit(node.whenTrue);
+                decreaseIndentIf(indentedBeforeQuestion, indentedAfterQuestion);
+                var indentedBeforeColon = indentIfOnDifferentLines(node, node.whenTrue, node.colonToken, " ");
+                write(":");
+                var indentedAfterColon = indentIfOnDifferentLines(node, node.colonToken, node.whenFalse, " ");
+                emit(node.whenFalse);
+                decreaseIndentIf(indentedBeforeColon, indentedAfterColon);
+            }
+            function decreaseIndentIf(value1, value2) {
+                if (value1) {
+                    decreaseIndent();
+                }
+                if (value2) {
+                    decreaseIndent();
+                }
+            }
+            function isSingleLineEmptyBlock(node) {
+                if (node && node.kind === 199) {
+                    var block = node;
+                    return block.statements.length === 0 && nodeEndIsOnSameLineAsNodeStart(block, block);
+                }
+            }
+            function emitBlock(node) {
+                if (isSingleLineEmptyBlock(node)) {
+                    emitToken(15, node.pos);
+                    write(" ");
+                    emitToken(16, node.statements.end);
+                    return;
+                }
+                emitToken(15, node.pos);
+                increaseIndent();
+                if (node.kind === 226) {
+                    ts.Debug.assert(node.parent.kind === 225);
+                    emitCaptureThisForNodeIfNecessary(node.parent);
+                }
+                emitLines(node.statements);
+                if (node.kind === 226) {
+                    emitTempDeclarations(true);
+                }
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.statements.end);
+            }
+            function emitEmbeddedStatement(node) {
+                if (node.kind === 199) {
+                    write(" ");
+                    emit(node);
+                }
+                else {
+                    increaseIndent();
+                    writeLine();
+                    emit(node);
+                    decreaseIndent();
+                }
+            }
+            function emitExpressionStatement(node) {
+                emitParenthesizedIf(node.expression, node.expression.kind === 180);
+                write(";");
+            }
+            function emitIfStatement(node) {
+                var endPos = emitToken(88, node.pos);
+                write(" ");
+                endPos = emitToken(17, endPos);
+                emit(node.expression);
+                emitToken(18, node.expression.end);
+                emitEmbeddedStatement(node.thenStatement);
+                if (node.elseStatement) {
+                    writeLine();
+                    emitToken(80, node.thenStatement.end);
+                    if (node.elseStatement.kind === 203) {
+                        write(" ");
+                        emit(node.elseStatement);
+                    }
+                    else {
+                        emitEmbeddedStatement(node.elseStatement);
+                    }
+                }
+            }
+            function emitDoStatement(node) {
+                emitLoop(node, emitDoStatementWorker);
+            }
+            function emitDoStatementWorker(node, loop) {
+                write("do");
+                if (loop) {
+                    emitConvertedLoopCall(loop, true);
+                }
+                else {
+                    emitNormalLoopBody(node, true);
+                }
+                if (node.statement.kind === 199) {
+                    write(" ");
+                }
+                else {
+                    writeLine();
+                }
+                write("while (");
+                emit(node.expression);
+                write(");");
+            }
+            function emitWhileStatement(node) {
+                emitLoop(node, emitWhileStatementWorker);
+            }
+            function emitWhileStatementWorker(node, loop) {
+                write("while (");
+                emit(node.expression);
+                write(")");
+                if (loop) {
+                    emitConvertedLoopCall(loop, true);
+                }
+                else {
+                    emitNormalLoopBody(node, true);
+                }
+            }
+            function tryEmitStartOfVariableDeclarationList(decl) {
+                if (shouldHoistVariable(decl, true)) {
+                    return false;
+                }
+                if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072) === 0) {
+                    for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) {
+                        var varDecl = _b[_a];
+                        hoistVariableDeclarationFromLoop(convertedLoopState, varDecl);
+                    }
+                    return false;
+                }
+                emitStart(decl);
+                if (decl && languageVersion >= 2) {
+                    if (ts.isLet(decl)) {
+                        write("let ");
+                    }
+                    else if (ts.isConst(decl)) {
+                        write("const ");
+                    }
+                    else {
+                        write("var ");
+                    }
+                }
+                else {
+                    write("var ");
+                }
+                return true;
+            }
+            function emitVariableDeclarationListSkippingUninitializedEntries(list) {
+                var started = false;
+                for (var _a = 0, _b = list.declarations; _a < _b.length; _a++) {
+                    var decl = _b[_a];
+                    if (!decl.initializer) {
+                        continue;
+                    }
+                    if (!started) {
+                        started = true;
+                    }
+                    else {
+                        write(", ");
+                    }
+                    emit(decl);
+                }
+                return started;
+            }
+            function shouldConvertLoopBody(node) {
+                return languageVersion < 2 &&
+                    (resolver.getNodeCheckFlags(node) & 65536) !== 0;
+            }
+            function emitLoop(node, loopEmitter) {
+                var shouldConvert = shouldConvertLoopBody(node);
+                if (!shouldConvert) {
+                    loopEmitter(node, undefined);
+                }
+                else {
+                    var loop = convertLoopBody(node);
+                    if (node.parent.kind === 214) {
+                        emitLabelAndColon(node.parent);
+                    }
+                    loopEmitter(node, loop);
+                }
+            }
+            function convertLoopBody(node) {
+                var functionName = makeUniqueName("_loop");
+                var loopInitializer;
+                switch (node.kind) {
+                    case 206:
+                    case 207:
+                    case 208:
+                        var initializer = node.initializer;
+                        if (initializer && initializer.kind === 219) {
+                            loopInitializer = node.initializer;
+                        }
+                        break;
+                }
+                var loopParameters;
+                var loopOutParameters;
+                if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3072)) {
+                    loopParameters = [];
+                    for (var _a = 0, _b = loopInitializer.declarations; _a < _b.length; _a++) {
+                        var varDeclaration = _b[_a];
+                        processVariableDeclaration(varDeclaration.name);
+                    }
+                }
+                var bodyIsBlock = node.statement.kind === 199;
+                var paramList = loopParameters ? loopParameters.join(", ") : "";
+                writeLine();
+                write("var " + functionName + " = function(" + paramList + ")");
+                var convertedOuterLoopState = convertedLoopState;
+                convertedLoopState = { loopOutParameters: loopOutParameters };
+                if (convertedOuterLoopState) {
+                    if (convertedOuterLoopState.argumentsName) {
+                        convertedLoopState.argumentsName = convertedOuterLoopState.argumentsName;
+                    }
+                    if (convertedOuterLoopState.thisName) {
+                        convertedLoopState.thisName = convertedOuterLoopState.thisName;
+                    }
+                    if (convertedOuterLoopState.hoistedLocalVariables) {
+                        convertedLoopState.hoistedLocalVariables = convertedOuterLoopState.hoistedLocalVariables;
+                    }
+                }
+                write(" {");
+                writeLine();
+                increaseIndent();
+                if (bodyIsBlock) {
+                    emitLines(node.statement.statements);
+                }
+                else {
+                    emit(node.statement);
+                }
+                writeLine();
+                copyLoopOutParameters(convertedLoopState, 1, true);
+                decreaseIndent();
+                writeLine();
+                write("};");
+                writeLine();
+                if (loopOutParameters) {
+                    write("var ");
+                    for (var i = 0; i < loopOutParameters.length; i++) {
+                        if (i !== 0) {
+                            write(", ");
+                        }
+                        write(loopOutParameters[i].outParamName);
+                    }
+                    write(";");
+                    writeLine();
+                }
+                if (convertedLoopState.argumentsName) {
+                    if (convertedOuterLoopState) {
+                        convertedOuterLoopState.argumentsName = convertedLoopState.argumentsName;
+                    }
+                    else {
+                        write("var " + convertedLoopState.argumentsName + " = arguments;");
+                        writeLine();
+                    }
+                }
+                if (convertedLoopState.thisName) {
+                    if (convertedOuterLoopState) {
+                        convertedOuterLoopState.thisName = convertedLoopState.thisName;
+                    }
+                    else {
+                        write("var " + convertedLoopState.thisName + " = this;");
+                        writeLine();
+                    }
+                }
+                if (convertedLoopState.hoistedLocalVariables) {
+                    if (convertedOuterLoopState) {
+                        convertedOuterLoopState.hoistedLocalVariables = convertedLoopState.hoistedLocalVariables;
+                    }
+                    else {
+                        write("var ");
+                        var seen = void 0;
+                        for (var _c = 0, _d = convertedLoopState.hoistedLocalVariables; _c < _d.length; _c++) {
+                            var id = _d[_c];
+                            if (!seen) {
+                                seen = {};
+                            }
+                            else {
+                                write(", ");
+                            }
+                            if (!ts.hasProperty(seen, id.text)) {
+                                emit(id);
+                                seen[id.text] = id.text;
+                            }
+                        }
+                        write(";");
+                        writeLine();
+                    }
+                }
+                var currentLoopState = convertedLoopState;
+                convertedLoopState = convertedOuterLoopState;
+                return { functionName: functionName, paramList: paramList, state: currentLoopState };
+                function processVariableDeclaration(name) {
+                    if (name.kind === 69) {
+                        var nameText = isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(name)
+                            ? getGeneratedNameForNode(name)
+                            : name.text;
+                        loopParameters.push(nameText);
+                        if (resolver.getNodeCheckFlags(name.parent) & 2097152) {
+                            var reassignedVariable = { originalName: name, outParamName: makeUniqueName("out_" + nameText) };
+                            (loopOutParameters || (loopOutParameters = [])).push(reassignedVariable);
+                        }
+                    }
+                    else {
+                        for (var _a = 0, _b = name.elements; _a < _b.length; _a++) {
+                            var element = _b[_a];
+                            processVariableDeclaration(element.name);
+                        }
+                    }
+                }
+            }
+            function emitNormalLoopBody(node, emitAsEmbeddedStatement) {
+                var saveAllowedNonLabeledJumps;
+                if (convertedLoopState) {
+                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                    convertedLoopState.allowedNonLabeledJumps = 2 | 4;
+                }
+                if (emitAsEmbeddedStatement) {
+                    emitEmbeddedStatement(node.statement);
+                }
+                else if (node.statement.kind === 199) {
+                    emitLines(node.statement.statements);
+                }
+                else {
+                    writeLine();
+                    emit(node.statement);
+                }
+                if (convertedLoopState) {
+                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
+                }
+            }
+            function copyLoopOutParameters(state, copyDirection, emitAsStatements) {
+                if (state.loopOutParameters) {
+                    for (var _a = 0, _b = state.loopOutParameters; _a < _b.length; _a++) {
+                        var outParam = _b[_a];
+                        if (copyDirection === 0) {
+                            emitIdentifier(outParam.originalName);
+                            write(" = " + outParam.outParamName);
+                        }
+                        else {
+                            write(outParam.outParamName + " = ");
+                            emitIdentifier(outParam.originalName);
+                        }
+                        if (emitAsStatements) {
+                            write(";");
+                            writeLine();
+                        }
+                        else {
+                            write(", ");
+                        }
+                    }
+                }
+            }
+            function emitConvertedLoopCall(loop, emitAsBlock) {
+                if (emitAsBlock) {
+                    write(" {");
+                    writeLine();
+                    increaseIndent();
+                }
+                var isSimpleLoop = !(loop.state.nonLocalJumps & ~4) &&
+                    !loop.state.labeledNonLocalBreaks &&
+                    !loop.state.labeledNonLocalContinues;
+                var loopResult = makeUniqueName("state");
+                if (!isSimpleLoop) {
+                    write("var " + loopResult + " = ");
+                }
+                write(loop.functionName + "(" + loop.paramList + ");");
+                writeLine();
+                copyLoopOutParameters(loop.state, 0, true);
+                if (!isSimpleLoop) {
+                    writeLine();
+                    if (loop.state.nonLocalJumps & 8) {
+                        write("if (typeof " + loopResult + " === \"object\") ");
+                        if (convertedLoopState) {
+                            write("return " + loopResult + ";");
+                            convertedLoopState.nonLocalJumps |= 8;
+                        }
+                        else {
+                            write("return " + loopResult + ".value;");
+                        }
+                        writeLine();
+                    }
+                    if (loop.state.nonLocalJumps & 2) {
+                        write("if (" + loopResult + " === \"break\") break;");
+                        writeLine();
+                    }
+                    emitDispatchTableForLabeledJumps(loopResult, loop.state, convertedLoopState);
+                }
+                if (emitAsBlock) {
+                    writeLine();
+                    decreaseIndent();
+                    write("}");
+                }
+                function emitDispatchTableForLabeledJumps(loopResultVariable, currentLoop, outerLoop) {
+                    if (!currentLoop.labeledNonLocalBreaks && !currentLoop.labeledNonLocalContinues) {
+                        return;
+                    }
+                    write("switch(" + loopResultVariable + ") {");
+                    increaseIndent();
+                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalBreaks, true, loopResultVariable, outerLoop);
+                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalContinues, false, loopResultVariable, outerLoop);
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+                function emitDispatchEntriesForLabeledJumps(table, isBreak, loopResultVariable, outerLoop) {
+                    if (!table) {
+                        return;
+                    }
+                    for (var labelText in table) {
+                        var labelMarker = table[labelText];
+                        writeLine();
+                        write("case \"" + labelMarker + "\": ");
+                        if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) {
+                            if (isBreak) {
+                                write("break ");
+                            }
+                            else {
+                                write("continue ");
+                            }
+                            write(labelText + ";");
+                        }
+                        else {
+                            setLabeledJump(outerLoop, isBreak, labelText, labelMarker);
+                            write("return " + loopResultVariable + ";");
+                        }
+                    }
+                }
+            }
+            function emitForStatement(node) {
+                emitLoop(node, emitForStatementWorker);
+            }
+            function emitForStatementWorker(node, loop) {
+                var endPos = emitToken(86, node.pos);
+                write(" ");
+                endPos = emitToken(17, endPos);
+                if (node.initializer && node.initializer.kind === 219) {
+                    var variableDeclarationList = node.initializer;
+                    var startIsEmitted = tryEmitStartOfVariableDeclarationList(variableDeclarationList);
+                    if (startIsEmitted) {
+                        emitCommaList(variableDeclarationList.declarations);
+                    }
+                    else {
+                        emitVariableDeclarationListSkippingUninitializedEntries(variableDeclarationList);
+                    }
+                }
+                else if (node.initializer) {
+                    emit(node.initializer);
+                }
+                write(";");
+                emitOptional(" ", node.condition);
+                write(";");
+                emitOptional(" ", node.incrementor);
+                write(")");
+                if (loop) {
+                    emitConvertedLoopCall(loop, true);
+                }
+                else {
+                    emitNormalLoopBody(node, true);
+                }
+            }
+            function emitForInOrForOfStatement(node) {
+                if (languageVersion < 2 && node.kind === 208) {
+                    emitLoop(node, emitDownLevelForOfStatementWorker);
+                }
+                else {
+                    emitLoop(node, emitForInOrForOfStatementWorker);
+                }
+            }
+            function emitForInOrForOfStatementWorker(node, loop) {
+                var endPos = emitToken(86, node.pos);
+                write(" ");
+                endPos = emitToken(17, endPos);
+                if (node.initializer.kind === 219) {
+                    var variableDeclarationList = node.initializer;
+                    if (variableDeclarationList.declarations.length >= 1) {
+                        tryEmitStartOfVariableDeclarationList(variableDeclarationList);
+                        emit(variableDeclarationList.declarations[0]);
+                    }
+                }
+                else {
+                    emit(node.initializer);
+                }
+                if (node.kind === 207) {
+                    write(" in ");
+                }
+                else {
+                    write(" of ");
+                }
+                emit(node.expression);
+                emitToken(18, node.expression.end);
+                if (loop) {
+                    emitConvertedLoopCall(loop, true);
+                }
+                else {
+                    emitNormalLoopBody(node, true);
+                }
+            }
+            function emitDownLevelForOfStatementWorker(node, loop) {
+                var endPos = emitToken(86, node.pos);
+                write(" ");
+                endPos = emitToken(17, endPos);
+                var counter = createTempVariable(268435456);
+                var rhsReference = ts.createSynthesizedNode(69);
+                rhsReference.text = node.expression.kind === 69 ?
+                    makeUniqueName(node.expression.text) :
+                    makeTempVariableName(0);
+                emitStart(node.expression);
+                write("var ");
+                emitNodeWithoutSourceMap(counter);
+                write(" = 0");
+                emitEnd(node.expression);
+                write(", ");
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(rhsReference);
+                write(" = ");
+                emitNodeWithoutSourceMap(node.expression);
+                emitEnd(node.expression);
+                write("; ");
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(counter);
+                write(" < ");
+                emitNodeWithCommentsAndWithoutSourcemap(rhsReference);
+                write(".length");
+                emitEnd(node.expression);
+                write("; ");
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(counter);
+                write("++");
+                emitEnd(node.expression);
+                emitToken(18, node.expression.end);
+                write(" {");
+                writeLine();
+                increaseIndent();
+                var rhsIterationValue = createElementAccessExpression(rhsReference, counter);
+                emitStart(node.initializer);
+                if (node.initializer.kind === 219) {
+                    write("var ");
+                    var variableDeclarationList = node.initializer;
+                    if (variableDeclarationList.declarations.length > 0) {
+                        var declaration = variableDeclarationList.declarations[0];
+                        if (ts.isBindingPattern(declaration.name)) {
+                            emitDestructuring(declaration, false, rhsIterationValue);
+                        }
+                        else {
+                            emitNodeWithCommentsAndWithoutSourcemap(declaration);
+                            write(" = ");
+                            emitNodeWithoutSourceMap(rhsIterationValue);
+                        }
+                    }
+                    else {
+                        emitNodeWithoutSourceMap(createTempVariable(0));
+                        write(" = ");
+                        emitNodeWithoutSourceMap(rhsIterationValue);
+                    }
+                }
+                else {
+                    var assignmentExpression = createBinaryExpression(node.initializer, 56, rhsIterationValue, false);
+                    if (node.initializer.kind === 170 || node.initializer.kind === 171) {
+                        emitDestructuring(assignmentExpression, true, undefined);
+                    }
+                    else {
+                        emitNodeWithCommentsAndWithoutSourcemap(assignmentExpression);
+                    }
+                }
+                emitEnd(node.initializer);
+                write(";");
+                if (loop) {
+                    writeLine();
+                    emitConvertedLoopCall(loop, false);
+                }
+                else {
+                    emitNormalLoopBody(node, false);
+                }
+                writeLine();
+                decreaseIndent();
+                write("}");
+            }
+            function emitBreakOrContinueStatement(node) {
+                if (convertedLoopState) {
+                    var jump = node.kind === 210 ? 2 : 4;
+                    var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) ||
+                        (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
+                    if (!canUseBreakOrContinue) {
+                        write("return ");
+                        copyLoopOutParameters(convertedLoopState, 1, false);
+                        if (!node.label) {
+                            if (node.kind === 210) {
+                                convertedLoopState.nonLocalJumps |= 2;
+                                write("\"break\";");
+                            }
+                            else {
+                                convertedLoopState.nonLocalJumps |= 4;
+                                write("\"continue\";");
+                            }
+                        }
+                        else {
+                            var labelMarker = void 0;
+                            if (node.kind === 210) {
+                                labelMarker = "break-" + node.label.text;
+                                setLabeledJump(convertedLoopState, true, node.label.text, labelMarker);
+                            }
+                            else {
+                                labelMarker = "continue-" + node.label.text;
+                                setLabeledJump(convertedLoopState, false, node.label.text, labelMarker);
+                            }
+                            write("\"" + labelMarker + "\";");
+                        }
+                        return;
+                    }
+                }
+                emitToken(node.kind === 210 ? 70 : 75, node.pos);
+                emitOptional(" ", node.label);
+                write(";");
+            }
+            function emitReturnStatement(node) {
+                if (convertedLoopState) {
+                    convertedLoopState.nonLocalJumps |= 8;
+                    write("return { value: ");
+                    if (node.expression) {
+                        emit(node.expression);
+                    }
+                    else {
+                        write("void 0");
+                    }
+                    write(" };");
+                    return;
+                }
+                emitToken(94, node.pos);
+                emitOptional(" ", node.expression);
+                write(";");
+            }
+            function emitWithStatement(node) {
+                write("with (");
+                emit(node.expression);
+                write(")");
+                emitEmbeddedStatement(node.statement);
+            }
+            function emitSwitchStatement(node) {
+                var endPos = emitToken(96, node.pos);
+                write(" ");
+                emitToken(17, endPos);
+                emit(node.expression);
+                endPos = emitToken(18, node.expression.end);
+                write(" ");
+                var saveAllowedNonLabeledJumps;
+                if (convertedLoopState) {
+                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                    convertedLoopState.allowedNonLabeledJumps |= 2;
+                }
+                emitCaseBlock(node.caseBlock, endPos);
+                if (convertedLoopState) {
+                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
+                }
+            }
+            function emitCaseBlock(node, startPos) {
+                emitToken(15, startPos);
+                increaseIndent();
+                emitLines(node.clauses);
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.clauses.end);
+            }
+            function nodeStartPositionsAreOnSameLine(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node1.pos)) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
+            }
+            function nodeEndPositionsAreOnSameLine(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, node2.end);
+            }
+            function nodeEndIsOnSameLineAsNodeStart(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
+            }
+            function emitCaseOrDefaultClause(node) {
+                if (node.kind === 249) {
+                    write("case ");
+                    emit(node.expression);
+                    write(":");
+                }
+                else {
+                    write("default:");
+                }
+                if (node.statements.length === 1 && nodeStartPositionsAreOnSameLine(node, node.statements[0])) {
+                    write(" ");
+                    emit(node.statements[0]);
+                }
+                else {
+                    increaseIndent();
+                    emitLines(node.statements);
+                    decreaseIndent();
+                }
+            }
+            function emitThrowStatement(node) {
+                write("throw ");
+                emit(node.expression);
+                write(";");
+            }
+            function emitTryStatement(node) {
+                write("try ");
+                emit(node.tryBlock);
+                emit(node.catchClause);
+                if (node.finallyBlock) {
+                    writeLine();
+                    write("finally ");
+                    emit(node.finallyBlock);
+                }
+            }
+            function emitCatchClause(node) {
+                writeLine();
+                var endPos = emitToken(72, node.pos);
+                write(" ");
+                emitToken(17, endPos);
+                emit(node.variableDeclaration);
+                emitToken(18, node.variableDeclaration ? node.variableDeclaration.end : endPos);
+                write(" ");
+                emitBlock(node.block);
+            }
+            function emitDebuggerStatement(node) {
+                emitToken(76, node.pos);
+                write(";");
+            }
+            function emitLabelAndColon(node) {
+                emit(node.label);
+                write(": ");
+            }
+            function emitLabeledStatement(node) {
+                if (!ts.isIterationStatement(node.statement, false) || !shouldConvertLoopBody(node.statement)) {
+                    emitLabelAndColon(node);
+                }
+                if (convertedLoopState) {
+                    if (!convertedLoopState.labels) {
+                        convertedLoopState.labels = {};
+                    }
+                    convertedLoopState.labels[node.label.text] = node.label.text;
+                }
+                emit(node.statement);
+                if (convertedLoopState) {
+                    convertedLoopState.labels[node.label.text] = undefined;
+                }
+            }
+            function getContainingModule(node) {
+                do {
+                    node = node.parent;
+                } while (node && node.kind !== 225);
+                return node;
+            }
+            function emitContainingModuleName(node) {
+                var container = getContainingModule(node);
+                write(container ? getGeneratedNameForNode(container) : "exports");
+            }
+            function emitModuleMemberName(node) {
+                emitStart(node.name);
+                if (ts.getCombinedNodeFlags(node) & 1) {
+                    var container = getContainingModule(node);
+                    if (container) {
+                        write(getGeneratedNameForNode(container));
+                        write(".");
+                    }
+                    else if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
+                        write("exports.");
+                    }
+                }
+                emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                emitEnd(node.name);
+            }
+            function createVoidZero() {
+                var zero = ts.createSynthesizedNode(8);
+                zero.text = "0";
+                var result = ts.createSynthesizedNode(183);
+                result.expression = zero;
+                return result;
+            }
+            function emitEs6ExportDefaultCompat(node) {
+                if (node.parent.kind === 256) {
+                    ts.Debug.assert(!!(node.flags & 512) || node.kind === 235);
+                    if (modulekind === ts.ModuleKind.CommonJS || modulekind === ts.ModuleKind.AMD || modulekind === ts.ModuleKind.UMD) {
+                        if (!isEs6Module) {
+                            if (languageVersion !== 0) {
+                                write('Object.defineProperty(exports, "__esModule", { value: true });');
+                                writeLine();
+                            }
+                            else {
+                                write("exports.__esModule = true;");
+                                writeLine();
+                            }
+                        }
+                    }
+                }
+            }
+            function emitExportMemberAssignment(node) {
+                if (node.flags & 1) {
+                    writeLine();
+                    emitStart(node);
+                    if (modulekind === ts.ModuleKind.System && node.parent === currentSourceFile) {
+                        write(exportFunctionForFile + "(\"");
+                        if (node.flags & 512) {
+                            write("default");
+                        }
+                        else {
+                            emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                        }
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(")");
+                    }
+                    else {
+                        if (node.flags & 512) {
+                            emitEs6ExportDefaultCompat(node);
+                            if (languageVersion === 0) {
+                                write('exports["default"]');
+                            }
+                            else {
+                                write("exports.default");
+                            }
+                        }
+                        else {
+                            emitModuleMemberName(node);
+                        }
+                        write(" = ");
+                        emitDeclarationName(node);
+                    }
+                    emitEnd(node);
+                    write(";");
+                }
+            }
+            function emitExportMemberAssignments(name) {
+                if (modulekind === ts.ModuleKind.System) {
+                    return;
+                }
+                if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
+                    for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
+                        var specifier = _b[_a];
+                        writeLine();
+                        emitStart(specifier.name);
+                        emitContainingModuleName(specifier);
+                        write(".");
+                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                        emitEnd(specifier.name);
+                        write(" = ");
+                        emitExpressionIdentifier(name);
+                        write(";");
+                    }
+                }
+            }
+            function emitExportSpecifierInSystemModule(specifier) {
+                ts.Debug.assert(modulekind === ts.ModuleKind.System);
+                if (!resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name) && !resolver.isValueAliasDeclaration(specifier)) {
+                    return;
+                }
+                writeLine();
+                emitStart(specifier.name);
+                write(exportFunctionForFile + "(\"");
+                emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                write("\", ");
+                emitExpressionIdentifier(specifier.propertyName || specifier.name);
+                write(")");
+                emitEnd(specifier.name);
+                write(";");
+            }
+            function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) {
+                if (shouldEmitCommaBeforeAssignment) {
+                    write(", ");
+                }
+                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name);
+                if (exportChanged) {
+                    write(exportFunctionForFile + "(\"");
+                    emitNodeWithCommentsAndWithoutSourcemap(name);
+                    write("\", ");
+                }
+                var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 || name.parent.kind === 169);
+                emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap);
+                withTemporaryNoSourceMap(function () {
+                    if (isVariableDeclarationOrBindingElement) {
+                        emitModuleMemberName(name.parent);
+                    }
+                    else {
+                        emit(name);
+                    }
+                    write(" = ");
+                    emit(value);
+                });
+                emitEnd(nodeForSourceMap, true);
+                if (exportChanged) {
+                    write(")");
+                }
+            }
+            function emitTempVariableAssignment(expression, canDefineTempVariablesInPlace, shouldEmitCommaBeforeAssignment, sourceMapNode) {
+                var identifier = createTempVariable(0);
+                if (!canDefineTempVariablesInPlace) {
+                    recordTempDeclaration(identifier);
+                }
+                emitAssignment(identifier, expression, shouldEmitCommaBeforeAssignment, sourceMapNode || expression.parent);
+                return identifier;
+            }
+            function isFirstVariableDeclaration(root) {
+                return root.kind === 218 &&
+                    root.parent.kind === 219 &&
+                    root.parent.declarations[0] === root;
+            }
+            function emitDestructuring(root, isAssignmentExpressionStatement, value) {
+                var emitCount = 0;
+                var canDefineTempVariablesInPlace = false;
+                if (root.kind === 218) {
+                    var isExported = ts.getCombinedNodeFlags(root) & 1;
+                    var isSourceLevelForSystemModuleKind = shouldHoistDeclarationInSystemJsModule(root);
+                    canDefineTempVariablesInPlace = !isExported && !isSourceLevelForSystemModuleKind;
+                }
+                else if (root.kind === 142) {
+                    canDefineTempVariablesInPlace = true;
+                }
+                if (root.kind === 187) {
+                    emitAssignmentExpression(root);
+                }
+                else {
+                    ts.Debug.assert(!isAssignmentExpressionStatement);
+                    if (isFirstVariableDeclaration(root)) {
+                        sourceMap.changeEmitSourcePos();
+                    }
+                    emitBindingElement(root, value);
+                }
+                function ensureIdentifier(expr, reuseIdentifierExpressions, sourceMapNode) {
+                    if (expr.kind === 69 && reuseIdentifierExpressions) {
+                        return expr;
+                    }
+                    var identifier = emitTempVariableAssignment(expr, canDefineTempVariablesInPlace, emitCount > 0, sourceMapNode);
+                    emitCount++;
+                    return identifier;
+                }
+                function createDefaultValueCheck(value, defaultValue, sourceMapNode) {
+                    value = ensureIdentifier(value, true, sourceMapNode);
+                    var equals = ts.createSynthesizedNode(187);
+                    equals.left = value;
+                    equals.operatorToken = ts.createSynthesizedNode(32);
+                    equals.right = createVoidZero();
+                    return createConditionalExpression(equals, defaultValue, value);
+                }
+                function createConditionalExpression(condition, whenTrue, whenFalse) {
+                    var cond = ts.createSynthesizedNode(188);
+                    cond.condition = condition;
+                    cond.questionToken = ts.createSynthesizedNode(53);
+                    cond.whenTrue = whenTrue;
+                    cond.colonToken = ts.createSynthesizedNode(54);
+                    cond.whenFalse = whenFalse;
+                    return cond;
+                }
+                function createNumericLiteral(value) {
+                    var node = ts.createSynthesizedNode(8);
+                    node.text = "" + value;
+                    return node;
+                }
+                function createPropertyAccessForDestructuringProperty(object, propName) {
+                    var index;
+                    var nameIsComputed = propName.kind === 140;
+                    if (nameIsComputed) {
+                        index = ensureIdentifier(propName.expression, false, propName);
+                    }
+                    else {
+                        index = ts.createSynthesizedNode(propName.kind);
+                        index.text = ts.unescapeIdentifier(propName.text);
+                    }
+                    return !nameIsComputed && index.kind === 69
+                        ? createPropertyAccessExpression(object, index)
+                        : createElementAccessExpression(object, index);
+                }
+                function createSliceCall(value, sliceIndex) {
+                    var call = ts.createSynthesizedNode(174);
+                    var sliceIdentifier = ts.createSynthesizedNode(69);
+                    sliceIdentifier.text = "slice";
+                    call.expression = createPropertyAccessExpression(value, sliceIdentifier);
+                    call.arguments = ts.createSynthesizedNodeArray();
+                    call.arguments[0] = createNumericLiteral(sliceIndex);
+                    return call;
+                }
+                function emitObjectLiteralAssignment(target, value, sourceMapNode) {
+                    var properties = target.properties;
+                    if (properties.length !== 1) {
+                        value = ensureIdentifier(value, true, sourceMapNode);
+                    }
+                    for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) {
+                        var p = properties_5[_a];
+                        if (p.kind === 253 || p.kind === 254) {
+                            var propName = p.name;
+                            var target_1 = p.kind === 254 ? p : p.initializer || propName;
+                            emitDestructuringAssignment(target_1, createPropertyAccessForDestructuringProperty(value, propName), p);
+                        }
+                    }
+                }
+                function emitArrayLiteralAssignment(target, value, sourceMapNode) {
+                    var elements = target.elements;
+                    if (elements.length !== 1) {
+                        value = ensureIdentifier(value, true, sourceMapNode);
+                    }
+                    for (var i = 0; i < elements.length; i++) {
+                        var e = elements[i];
+                        if (e.kind !== 193) {
+                            if (e.kind !== 191) {
+                                emitDestructuringAssignment(e, createElementAccessExpression(value, createNumericLiteral(i)), e);
+                            }
+                            else if (i === elements.length - 1) {
+                                emitDestructuringAssignment(e.expression, createSliceCall(value, i), e);
+                            }
+                        }
+                    }
+                }
+                function emitDestructuringAssignment(target, value, sourceMapNode) {
+                    if (target.kind === 254) {
+                        if (target.objectAssignmentInitializer) {
+                            value = createDefaultValueCheck(value, target.objectAssignmentInitializer, sourceMapNode);
+                        }
+                        target = target.name;
+                    }
+                    else if (target.kind === 187 && target.operatorToken.kind === 56) {
+                        value = createDefaultValueCheck(value, target.right, sourceMapNode);
+                        target = target.left;
+                    }
+                    if (target.kind === 171) {
+                        emitObjectLiteralAssignment(target, value, sourceMapNode);
+                    }
+                    else if (target.kind === 170) {
+                        emitArrayLiteralAssignment(target, value, sourceMapNode);
+                    }
+                    else {
+                        emitAssignment(target, value, emitCount > 0, sourceMapNode);
+                        emitCount++;
+                    }
+                }
+                function emitAssignmentExpression(root) {
+                    var target = root.left;
+                    var value = root.right;
+                    if (ts.isEmptyObjectLiteralOrArrayLiteral(target)) {
+                        emit(value);
+                    }
+                    else if (isAssignmentExpressionStatement) {
+                        emitDestructuringAssignment(target, value, ts.nodeIsSynthesized(root) ? target : root);
+                    }
+                    else {
+                        if (root.parent.kind !== 178) {
+                            write("(");
+                        }
+                        value = ensureIdentifier(value, true, root);
+                        emitDestructuringAssignment(target, value, root);
+                        write(", ");
+                        emit(value);
+                        if (root.parent.kind !== 178) {
+                            write(")");
+                        }
+                    }
+                }
+                function emitBindingElement(target, value) {
+                    if (target.initializer) {
+                        value = value ? createDefaultValueCheck(value, target.initializer, target) : target.initializer;
+                    }
+                    else if (!value) {
+                        value = createVoidZero();
+                    }
+                    if (ts.isBindingPattern(target.name)) {
+                        var pattern = target.name;
+                        var elements = pattern.elements;
+                        var numElements = elements.length;
+                        if (numElements !== 1) {
+                            value = ensureIdentifier(value, numElements !== 0, target);
+                        }
+                        for (var i = 0; i < numElements; i++) {
+                            var element = elements[i];
+                            if (pattern.kind === 167) {
+                                var propName = element.propertyName || element.name;
+                                emitBindingElement(element, createPropertyAccessForDestructuringProperty(value, propName));
+                            }
+                            else if (element.kind !== 193) {
+                                if (!element.dotDotDotToken) {
+                                    emitBindingElement(element, createElementAccessExpression(value, createNumericLiteral(i)));
+                                }
+                                else if (i === numElements - 1) {
+                                    emitBindingElement(element, createSliceCall(value, i));
+                                }
+                            }
+                        }
+                    }
+                    else {
+                        emitAssignment(target.name, value, emitCount > 0, target);
+                        emitCount++;
+                    }
+                }
+            }
+            function emitVariableDeclaration(node) {
+                if (ts.isBindingPattern(node.name)) {
+                    var isExported = ts.getCombinedNodeFlags(node) & 1;
+                    if (languageVersion >= 2 && (!isExported || modulekind === ts.ModuleKind.ES6)) {
+                        var isTopLevelDeclarationInSystemModule = modulekind === ts.ModuleKind.System &&
+                            shouldHoistVariable(node, true);
+                        if (isTopLevelDeclarationInSystemModule) {
+                            write("(");
+                        }
+                        emit(node.name);
+                        emitOptional(" = ", node.initializer);
+                        if (isTopLevelDeclarationInSystemModule) {
+                            write(")");
+                        }
+                    }
+                    else {
+                        emitDestructuring(node, false);
+                    }
+                }
+                else {
+                    var initializer = node.initializer;
+                    if (!initializer &&
+                        languageVersion < 2 &&
+                        node.name.kind === 69) {
+                        var container = ts.getEnclosingBlockScopeContainer(node);
+                        var flags = resolver.getNodeCheckFlags(node);
+                        var isCapturedInFunction = flags & 131072;
+                        var isDeclaredInLoop = flags & 262144;
+                        var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(container) ||
+                            (isCapturedInFunction && isDeclaredInLoop && container.kind === 199 && ts.isIterationStatement(container.parent, false));
+                        var emittedAsNestedLetDeclaration = ts.getCombinedNodeFlags(node) & 1024 &&
+                            !emittedAsTopLevel;
+                        var emitExplicitInitializer = emittedAsNestedLetDeclaration &&
+                            container.kind !== 207 &&
+                            container.kind !== 208 &&
+                            (!resolver.isDeclarationWithCollidingName(node) ||
+                                (isDeclaredInLoop && !isCapturedInFunction && !ts.isIterationStatement(container, false)));
+                        if (emitExplicitInitializer) {
+                            initializer = createVoidZero();
+                        }
+                    }
+                    var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.name);
+                    if (exportChanged) {
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                        write("\", ");
+                    }
+                    emitModuleMemberName(node);
+                    emitOptional(" = ", initializer);
+                    if (exportChanged) {
+                        write(")");
+                    }
+                }
+            }
+            function emitExportVariableAssignments(node) {
+                if (node.kind === 193) {
+                    return;
+                }
+                var name = node.name;
+                if (name.kind === 69) {
+                    emitExportMemberAssignments(name);
+                }
+                else if (ts.isBindingPattern(name)) {
+                    ts.forEach(name.elements, emitExportVariableAssignments);
+                }
+            }
+            function isES6ExportedDeclaration(node) {
+                return !!(node.flags & 1) &&
+                    modulekind === ts.ModuleKind.ES6 &&
+                    node.parent.kind === 256;
+            }
+            function emitVariableStatement(node) {
+                var startIsEmitted = false;
+                if (node.flags & 1) {
+                    if (isES6ExportedDeclaration(node)) {
+                        write("export ");
+                        startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
+                    }
+                }
+                else {
+                    startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
+                }
+                if (startIsEmitted) {
+                    emitCommaList(node.declarationList.declarations);
+                    write(";");
+                }
+                else {
+                    var atLeastOneItem = emitVariableDeclarationListSkippingUninitializedEntries(node.declarationList);
+                    if (atLeastOneItem) {
+                        write(";");
+                    }
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
+                    ts.forEach(node.declarationList.declarations, emitExportVariableAssignments);
+                }
+            }
+            function shouldEmitLeadingAndTrailingCommentsForVariableStatement(node) {
+                if (!(node.flags & 1)) {
+                    return true;
+                }
+                if (isES6ExportedDeclaration(node)) {
+                    return true;
+                }
+                for (var _a = 0, _b = node.declarationList.declarations; _a < _b.length; _a++) {
+                    var declaration = _b[_a];
+                    if (declaration.initializer) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function emitParameter(node) {
+                if (languageVersion < 2) {
+                    if (ts.isBindingPattern(node.name)) {
+                        var name_29 = createTempVariable(0);
+                        if (!tempParameters) {
+                            tempParameters = [];
+                        }
+                        tempParameters.push(name_29);
+                        emit(name_29);
+                    }
+                    else {
+                        emit(node.name);
+                    }
+                }
+                else {
+                    if (node.dotDotDotToken) {
+                        write("...");
+                    }
+                    emit(node.name);
+                    emitOptional(" = ", node.initializer);
+                }
+            }
+            function emitDefaultValueAssignments(node) {
+                if (languageVersion < 2) {
+                    var tempIndex_1 = 0;
+                    ts.forEach(node.parameters, function (parameter) {
+                        if (parameter.dotDotDotToken) {
+                            return;
+                        }
+                        var paramName = parameter.name, initializer = parameter.initializer;
+                        if (ts.isBindingPattern(paramName)) {
+                            var hasBindingElements = paramName.elements.length > 0;
+                            if (hasBindingElements || initializer) {
+                                writeLine();
+                                write("var ");
+                                if (hasBindingElements) {
+                                    emitDestructuring(parameter, false, tempParameters[tempIndex_1]);
+                                }
+                                else {
+                                    emit(tempParameters[tempIndex_1]);
+                                    write(" = ");
+                                    emit(initializer);
+                                }
+                                write(";");
+                                tempIndex_1++;
+                            }
+                        }
+                        else if (initializer) {
+                            writeLine();
+                            emitStart(parameter);
+                            write("if (");
+                            emitNodeWithoutSourceMap(paramName);
+                            write(" === void 0)");
+                            emitEnd(parameter);
+                            write(" { ");
+                            emitStart(parameter);
+                            emitNodeWithCommentsAndWithoutSourcemap(paramName);
+                            write(" = ");
+                            emitNodeWithCommentsAndWithoutSourcemap(initializer);
+                            emitEnd(parameter);
+                            write("; }");
+                        }
+                    });
+                }
+            }
+            function emitRestParameter(node) {
+                if (languageVersion < 2 && ts.hasDeclaredRestParameter(node)) {
+                    var restIndex = node.parameters.length - 1;
+                    var restParam = node.parameters[restIndex];
+                    if (ts.isBindingPattern(restParam.name)) {
+                        return;
+                    }
+                    var tempName = createTempVariable(268435456).text;
+                    writeLine();
+                    emitLeadingComments(restParam);
+                    emitStart(restParam);
+                    write("var ");
+                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
+                    write(" = [];");
+                    emitEnd(restParam);
+                    emitTrailingComments(restParam);
+                    writeLine();
+                    write("for (");
+                    emitStart(restParam);
+                    write("var " + tempName + " = " + restIndex + ";");
+                    emitEnd(restParam);
+                    write(" ");
+                    emitStart(restParam);
+                    write(tempName + " < arguments.length;");
+                    emitEnd(restParam);
+                    write(" ");
+                    emitStart(restParam);
+                    write(tempName + "++");
+                    emitEnd(restParam);
+                    write(") {");
+                    increaseIndent();
+                    writeLine();
+                    emitStart(restParam);
+                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
+                    write("[" + tempName + " - " + restIndex + "] = arguments[" + tempName + "];");
+                    emitEnd(restParam);
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function emitAccessor(node) {
+                write(node.kind === 149 ? "get " : "set ");
+                emit(node.name);
+                emitSignatureAndBody(node);
+            }
+            function shouldEmitAsArrowFunction(node) {
+                return node.kind === 180 && languageVersion >= 2;
+            }
+            function emitDeclarationName(node) {
+                if (node.name) {
+                    emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                }
+                else {
+                    write(getGeneratedNameForNode(node));
+                }
+            }
+            function shouldEmitFunctionName(node) {
+                if (node.kind === 179) {
+                    return !!node.name;
+                }
+                if (node.kind === 220) {
+                    return !!node.name || modulekind !== ts.ModuleKind.ES6;
+                }
+            }
+            function emitFunctionDeclaration(node) {
+                if (ts.nodeIsMissing(node.body)) {
+                    return emitCommentsOnNotEmittedNode(node);
+                }
+                var kind = node.kind, parent = node.parent;
+                if (kind !== 147 &&
+                    kind !== 146 &&
+                    parent &&
+                    parent.kind !== 253 &&
+                    parent.kind !== 174 &&
+                    parent.kind !== 170) {
+                    emitLeadingComments(node);
+                }
+                emitStart(node);
+                if (!shouldEmitAsArrowFunction(node)) {
+                    if (isES6ExportedDeclaration(node)) {
+                        write("export ");
+                        if (node.flags & 512) {
+                            write("default ");
+                        }
+                    }
+                    write("function");
+                    if (languageVersion >= 2 && node.asteriskToken) {
+                        write("*");
+                    }
+                    write(" ");
+                }
+                if (shouldEmitFunctionName(node)) {
+                    emitDeclarationName(node);
+                }
+                emitSignatureAndBody(node);
+                if (modulekind !== ts.ModuleKind.ES6 && kind === 220 && parent === currentSourceFile && node.name) {
+                    emitExportMemberAssignments(node.name);
+                }
+                emitEnd(node);
+                if (kind !== 147 &&
+                    kind !== 146 &&
+                    kind !== 180) {
+                    emitTrailingComments(node);
+                }
+            }
+            function emitCaptureThisForNodeIfNecessary(node) {
+                if (resolver.getNodeCheckFlags(node) & 4) {
+                    writeLine();
+                    emitStart(node);
+                    write("var _this = this;");
+                    emitEnd(node);
+                }
+            }
+            function emitSignatureParameters(node) {
+                increaseIndent();
+                write("(");
+                if (node) {
+                    var parameters = node.parameters;
+                    var skipCount = node.parameters.length && node.parameters[0].name.text === "this" ? 1 : 0;
+                    var omitCount = languageVersion < 2 && ts.hasDeclaredRestParameter(node) ? 1 : 0;
+                    emitList(parameters, skipCount, parameters.length - omitCount - skipCount, false, false);
+                }
+                write(")");
+                decreaseIndent();
+            }
+            function emitSignatureParametersForArrow(node) {
+                if (node.parameters.length === 1 && node.pos === node.parameters[0].pos) {
+                    emit(node.parameters[0]);
+                    return;
+                }
+                emitSignatureParameters(node);
+            }
+            function emitAsyncFunctionBodyForES6(node) {
+                var promiseConstructor = ts.getEntityNameFromTypeNode(node.type);
+                var isArrowFunction = node.kind === 180;
+                var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192) !== 0;
+                if (!isArrowFunction) {
+                    write(" {");
+                    increaseIndent();
+                    writeLine();
+                    if (resolver.getNodeCheckFlags(node) & 4096) {
+                        writeLines("\nconst _super = (function (geti, seti) {\n    const cache = Object.create(null);\n    return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);");
+                        writeLine();
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & 2048) {
+                        write("const _super = name => super[name];");
+                        writeLine();
+                    }
+                    write("return");
+                }
+                write(" __awaiter(this");
+                if (hasLexicalArguments) {
+                    write(", arguments, ");
+                }
+                else {
+                    write(", void 0, ");
+                }
+                if (languageVersion >= 2 || !promiseConstructor) {
+                    write("void 0");
+                }
+                else {
+                    emitEntityNameAsExpression(promiseConstructor, false);
+                }
+                write(", function* ()");
+                emitFunctionBody(node);
+                write(")");
+                if (!isArrowFunction) {
+                    write(";");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function emitFunctionBody(node) {
+                if (!node.body) {
+                    write(" { }");
+                }
+                else {
+                    if (node.body.kind === 199) {
+                        emitBlockFunctionBody(node, node.body);
+                    }
+                    else {
+                        emitExpressionFunctionBody(node, node.body);
+                    }
+                }
+            }
+            function emitSignatureAndBody(node) {
+                var saveConvertedLoopState = convertedLoopState;
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                if (shouldEmitAsArrowFunction(node)) {
+                    emitSignatureParametersForArrow(node);
+                    write(" =>");
+                }
+                else {
+                    emitSignatureParameters(node);
+                }
+                var isAsync = ts.isAsyncFunctionLike(node);
+                if (isAsync) {
+                    emitAsyncFunctionBodyForES6(node);
+                }
+                else {
+                    emitFunctionBody(node);
+                }
+                if (!isES6ExportedDeclaration(node)) {
+                    emitExportMemberAssignment(node);
+                }
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+            }
+            function emitFunctionBodyPreamble(node) {
+                emitCaptureThisForNodeIfNecessary(node);
+                emitDefaultValueAssignments(node);
+                emitRestParameter(node);
+            }
+            function emitExpressionFunctionBody(node, body) {
+                if (languageVersion < 2 || node.flags & 256) {
+                    emitDownLevelExpressionFunctionBody(node, body);
+                    return;
+                }
+                write(" ");
+                var current = body;
+                while (current.kind === 177) {
+                    current = current.expression;
+                }
+                emitParenthesizedIf(body, current.kind === 171);
+            }
+            function emitDownLevelExpressionFunctionBody(node, body) {
+                write(" {");
+                increaseIndent();
+                var outPos = writer.getTextPos();
+                emitDetachedCommentsAndUpdateCommentsInfo(node.body);
+                emitFunctionBodyPreamble(node);
+                var preambleEmitted = writer.getTextPos() !== outPos;
+                decreaseIndent();
+                if (!preambleEmitted && nodeStartPositionsAreOnSameLine(node, body)) {
+                    write(" ");
+                    emitStart(body);
+                    write("return ");
+                    emit(body);
+                    emitEnd(body);
+                    write(";");
+                    emitTempDeclarations(false);
+                    write(" ");
+                }
+                else {
+                    increaseIndent();
+                    writeLine();
+                    emitLeadingComments(node.body);
+                    emitStart(body);
+                    write("return ");
+                    emit(body);
+                    emitEnd(body);
+                    write(";");
+                    emitTrailingComments(node.body);
+                    emitTempDeclarations(true);
+                    decreaseIndent();
+                    writeLine();
+                }
+                emitStart(node.body);
+                write("}");
+                emitEnd(node.body);
+            }
+            function emitBlockFunctionBody(node, body) {
+                write(" {");
+                var initialTextPos = writer.getTextPos();
+                increaseIndent();
+                emitDetachedCommentsAndUpdateCommentsInfo(body.statements);
+                var startIndex = emitDirectivePrologues(body.statements, true);
+                emitFunctionBodyPreamble(node);
+                decreaseIndent();
+                var preambleEmitted = writer.getTextPos() !== initialTextPos;
+                if (!preambleEmitted && nodeEndIsOnSameLineAsNodeStart(body, body)) {
+                    for (var _a = 0, _b = body.statements; _a < _b.length; _a++) {
+                        var statement = _b[_a];
+                        write(" ");
+                        emit(statement);
+                    }
+                    emitTempDeclarations(false);
+                    write(" ");
+                    emitLeadingCommentsOfPosition(body.statements.end);
+                }
+                else {
+                    increaseIndent();
+                    emitLinesStartingAt(body.statements, startIndex);
+                    emitTempDeclarations(true);
+                    writeLine();
+                    emitLeadingCommentsOfPosition(body.statements.end);
+                    decreaseIndent();
+                }
+                emitToken(16, body.statements.end);
+            }
+            function getSuperCallAtGivenIndex(ctor, index) {
+                if (!ctor.body) {
+                    return undefined;
+                }
+                var statements = ctor.body.statements;
+                if (!statements || index >= statements.length) {
+                    return undefined;
+                }
+                var statement = statements[index];
+                if (statement.kind === 202) {
+                    return ts.isSuperCallExpression(statement.expression) ? statement : undefined;
+                }
+            }
+            function emitParameterPropertyAssignments(node) {
+                ts.forEach(node.parameters, function (param) {
+                    if (param.flags & 92) {
+                        writeLine();
+                        emitStart(param);
+                        emitStart(param.name);
+                        write("this.");
+                        emitNodeWithoutSourceMap(param.name);
+                        emitEnd(param.name);
+                        write(" = ");
+                        emit(param.name);
+                        write(";");
+                        emitEnd(param);
+                    }
+                });
+            }
+            function emitMemberAccessForPropertyName(memberName) {
+                if (memberName.kind === 9 || memberName.kind === 8) {
+                    write("[");
+                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
+                    write("]");
+                }
+                else if (memberName.kind === 140) {
+                    emitComputedPropertyName(memberName);
+                }
+                else {
+                    write(".");
+                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
+                }
+            }
+            function getInitializedProperties(node, isStatic) {
+                var properties = [];
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    if (member.kind === 145 && isStatic === ((member.flags & 32) !== 0) && member.initializer) {
+                        properties.push(member);
+                    }
+                }
+                return properties;
+            }
+            function emitPropertyDeclarations(node, properties) {
+                for (var _a = 0, properties_6 = properties; _a < properties_6.length; _a++) {
+                    var property = properties_6[_a];
+                    emitPropertyDeclaration(node, property);
+                }
+            }
+            function emitPropertyDeclaration(node, property, receiver, isExpression) {
+                writeLine();
+                emitLeadingComments(property);
+                emitStart(property);
+                emitStart(property.name);
+                if (receiver) {
+                    emit(receiver);
+                }
+                else {
+                    if (property.flags & 32) {
+                        emitDeclarationName(node);
+                    }
+                    else {
+                        write("this");
+                    }
+                }
+                emitMemberAccessForPropertyName(property.name);
+                emitEnd(property.name);
+                write(" = ");
+                emit(property.initializer);
+                if (!isExpression) {
+                    write(";");
+                }
+                emitEnd(property);
+                emitTrailingComments(property);
+            }
+            function emitMemberFunctionsForES5AndLower(node) {
+                ts.forEach(node.members, function (member) {
+                    if (member.kind === 198) {
+                        writeLine();
+                        write(";");
+                    }
+                    else if (member.kind === 147 || node.kind === 146) {
+                        if (!member.body) {
+                            return emitCommentsOnNotEmittedNode(member);
+                        }
+                        writeLine();
+                        emitLeadingComments(member);
+                        emitStart(member);
+                        emitStart(member.name);
+                        emitClassMemberPrefix(node, member);
+                        emitMemberAccessForPropertyName(member.name);
+                        emitEnd(member.name);
+                        write(" = ");
+                        emitFunctionDeclaration(member);
+                        emitEnd(member);
+                        write(";");
+                        emitTrailingComments(member);
+                    }
+                    else if (member.kind === 149 || member.kind === 150) {
+                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
+                        if (member === accessors.firstAccessor) {
+                            writeLine();
+                            emitStart(member);
+                            write("Object.defineProperty(");
+                            emitStart(member.name);
+                            emitClassMemberPrefix(node, member);
+                            write(", ");
+                            emitExpressionForPropertyName(member.name);
+                            emitEnd(member.name);
+                            write(", {");
+                            increaseIndent();
+                            if (accessors.getAccessor) {
+                                writeLine();
+                                emitLeadingComments(accessors.getAccessor);
+                                write("get: ");
+                                emitStart(accessors.getAccessor);
+                                write("function ");
+                                emitSignatureAndBody(accessors.getAccessor);
+                                emitEnd(accessors.getAccessor);
+                                emitTrailingComments(accessors.getAccessor);
+                                write(",");
+                            }
+                            if (accessors.setAccessor) {
+                                writeLine();
+                                emitLeadingComments(accessors.setAccessor);
+                                write("set: ");
+                                emitStart(accessors.setAccessor);
+                                write("function ");
+                                emitSignatureAndBody(accessors.setAccessor);
+                                emitEnd(accessors.setAccessor);
+                                emitTrailingComments(accessors.setAccessor);
+                                write(",");
+                            }
+                            writeLine();
+                            write("enumerable: true,");
+                            writeLine();
+                            write("configurable: true");
+                            decreaseIndent();
+                            writeLine();
+                            write("});");
+                            emitEnd(member);
+                        }
+                    }
+                });
+            }
+            function emitMemberFunctionsForES6AndHigher(node) {
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    if ((member.kind === 147 || node.kind === 146) && !member.body) {
+                        emitCommentsOnNotEmittedNode(member);
+                    }
+                    else if (member.kind === 147 ||
+                        member.kind === 149 ||
+                        member.kind === 150) {
+                        writeLine();
+                        emitLeadingComments(member);
+                        emitStart(member);
+                        if (member.flags & 32) {
+                            write("static ");
+                        }
+                        if (member.kind === 149) {
+                            write("get ");
+                        }
+                        else if (member.kind === 150) {
+                            write("set ");
+                        }
+                        if (member.asteriskToken) {
+                            write("*");
+                        }
+                        emit(member.name);
+                        emitSignatureAndBody(member);
+                        emitEnd(member);
+                        emitTrailingComments(member);
+                    }
+                    else if (member.kind === 198) {
+                        writeLine();
+                        write(";");
+                    }
+                }
+            }
+            function emitConstructor(node, baseTypeElement) {
+                var saveConvertedLoopState = convertedLoopState;
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                emitConstructorWorker(node, baseTypeElement);
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+            }
+            function emitConstructorWorker(node, baseTypeElement) {
+                var hasInstancePropertyWithInitializer = false;
+                ts.forEach(node.members, function (member) {
+                    if (member.kind === 148 && !member.body) {
+                        emitCommentsOnNotEmittedNode(member);
+                    }
+                    if (member.kind === 145 && member.initializer && (member.flags & 32) === 0) {
+                        hasInstancePropertyWithInitializer = true;
+                    }
+                });
+                var ctor = ts.getFirstConstructorWithBody(node);
+                if (languageVersion >= 2 && !ctor && !hasInstancePropertyWithInitializer) {
+                    return;
+                }
+                if (ctor) {
+                    emitLeadingComments(ctor);
+                }
+                emitStart(ctor || node);
+                if (languageVersion < 2) {
+                    write("function ");
+                    emitDeclarationName(node);
+                    emitSignatureParameters(ctor);
+                }
+                else {
+                    write("constructor");
+                    if (ctor) {
+                        emitSignatureParameters(ctor);
+                    }
+                    else {
+                        if (baseTypeElement) {
+                            write("(...args)");
+                        }
+                        else {
+                            write("()");
+                        }
+                    }
+                }
+                var startIndex = 0;
+                write(" {");
+                increaseIndent();
+                if (ctor) {
+                    startIndex = emitDirectivePrologues(ctor.body.statements, true);
+                    emitDetachedCommentsAndUpdateCommentsInfo(ctor.body.statements);
+                }
+                emitCaptureThisForNodeIfNecessary(node);
+                var superCall;
+                if (ctor) {
+                    emitDefaultValueAssignments(ctor);
+                    emitRestParameter(ctor);
+                    if (baseTypeElement) {
+                        superCall = getSuperCallAtGivenIndex(ctor, startIndex);
+                        if (superCall) {
+                            writeLine();
+                            emit(superCall);
+                        }
+                    }
+                    emitParameterPropertyAssignments(ctor);
+                }
+                else {
+                    if (baseTypeElement) {
+                        writeLine();
+                        emitStart(baseTypeElement);
+                        if (languageVersion < 2) {
+                            write("_super.apply(this, arguments);");
+                        }
+                        else {
+                            write("super(...args);");
+                        }
+                        emitEnd(baseTypeElement);
+                    }
+                }
+                emitPropertyDeclarations(node, getInitializedProperties(node, false));
+                if (ctor) {
+                    var statements = ctor.body.statements;
+                    if (superCall) {
+                        statements = statements.slice(1);
+                    }
+                    emitLinesStartingAt(statements, startIndex);
+                }
+                emitTempDeclarations(true);
+                writeLine();
+                if (ctor) {
+                    emitLeadingCommentsOfPosition(ctor.body.statements.end);
+                }
+                decreaseIndent();
+                emitToken(16, ctor ? ctor.body.statements.end : node.members.end);
+                emitEnd(ctor || node);
+                if (ctor) {
+                    emitTrailingComments(ctor);
+                }
+            }
+            function emitClassExpression(node) {
+                return emitClassLikeDeclaration(node);
+            }
+            function emitClassDeclaration(node) {
+                return emitClassLikeDeclaration(node);
+            }
+            function emitClassLikeDeclaration(node) {
+                if (languageVersion < 2) {
+                    emitClassLikeDeclarationBelowES6(node);
+                }
+                else {
+                    emitClassLikeDeclarationForES6AndHigher(node);
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile && node.name) {
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            function emitClassLikeDeclarationForES6AndHigher(node) {
+                var decoratedClassAlias;
+                var isHoistedDeclarationInSystemModule = shouldHoistDeclarationInSystemJsModule(node);
+                var isDecorated = ts.nodeIsDecorated(node);
+                var rewriteAsClassExpression = isDecorated || isHoistedDeclarationInSystemModule;
+                if (node.kind === 221) {
+                    if (rewriteAsClassExpression) {
+                        if (isDecorated && resolver.getNodeCheckFlags(node) & 524288) {
+                            decoratedClassAlias = ts.unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default"));
+                            decoratedClassAliases[ts.getNodeId(node)] = decoratedClassAlias;
+                        }
+                        if (isES6ExportedDeclaration(node) && !(node.flags & 512) && decoratedClassAlias === undefined) {
+                            write("export ");
+                        }
+                        if (!isHoistedDeclarationInSystemModule) {
+                            write("let ");
+                        }
+                        if (decoratedClassAlias !== undefined) {
+                            write("" + decoratedClassAlias);
+                        }
+                        else {
+                            emitDeclarationName(node);
+                        }
+                        write(" = ");
+                    }
+                    else if (isES6ExportedDeclaration(node)) {
+                        write("export ");
+                        if (node.flags & 512) {
+                            write("default ");
+                        }
+                    }
+                }
+                var staticProperties = getInitializedProperties(node, true);
+                var isClassExpressionWithStaticProperties = staticProperties.length > 0 && node.kind === 192;
+                var tempVariable;
+                if (isClassExpressionWithStaticProperties) {
+                    tempVariable = createAndRecordTempVariable(0);
+                    write("(");
+                    increaseIndent();
+                    emit(tempVariable);
+                    write(" = ");
+                }
+                write("class");
+                if (node.name || (node.flags & 512 && (staticProperties.length > 0 || modulekind !== ts.ModuleKind.ES6) && !rewriteAsClassExpression)) {
+                    write(" ");
+                    emitDeclarationName(node);
+                }
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+                if (baseTypeNode) {
+                    write(" extends ");
+                    emit(baseTypeNode.expression);
+                }
+                write(" {");
+                increaseIndent();
+                writeLine();
+                emitConstructor(node, baseTypeNode);
+                emitMemberFunctionsForES6AndHigher(node);
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.members.end);
+                if (rewriteAsClassExpression) {
+                    if (decoratedClassAlias !== undefined) {
+                        write(";");
+                        writeLine();
+                        if (isES6ExportedDeclaration(node) && !(node.flags & 512)) {
+                            write("export ");
+                        }
+                        write("let ");
+                        emitDeclarationName(node);
+                        write(" = " + decoratedClassAlias);
+                    }
+                    decoratedClassAliases[ts.getNodeId(node)] = undefined;
+                    write(";");
+                }
+                if (isClassExpressionWithStaticProperties) {
+                    for (var _a = 0, staticProperties_1 = staticProperties; _a < staticProperties_1.length; _a++) {
+                        var property = staticProperties_1[_a];
+                        write(",");
+                        writeLine();
+                        emitPropertyDeclaration(node, property, tempVariable, true);
+                    }
+                    write(",");
+                    writeLine();
+                    emit(tempVariable);
+                    decreaseIndent();
+                    write(")");
+                }
+                else {
+                    writeLine();
+                    emitPropertyDeclarations(node, staticProperties);
+                    emitDecoratorsOfClass(node, decoratedClassAlias);
+                }
+                if (!(node.flags & 1)) {
+                    return;
+                }
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    emitExportMemberAssignment(node);
+                }
+                else {
+                    if (node.flags & 512) {
+                        if (isDecorated) {
+                            writeLine();
+                            write("export default ");
+                            emitDeclarationName(node);
+                            write(";");
+                        }
+                    }
+                    else if (node.parent.kind !== 256) {
+                        writeLine();
+                        emitStart(node);
+                        emitModuleMemberName(node);
+                        write(" = ");
+                        emitDeclarationName(node);
+                        emitEnd(node);
+                        write(";");
+                    }
+                }
+            }
+            function emitClassLikeDeclarationBelowES6(node) {
+                if (node.kind === 221) {
+                    if (!shouldHoistDeclarationInSystemJsModule(node)) {
+                        write("var ");
+                    }
+                    emitDeclarationName(node);
+                    write(" = ");
+                }
+                write("(function (");
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+                if (baseTypeNode) {
+                    write("_super");
+                }
+                write(") {");
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                var saveComputedPropertyNamesToGeneratedNames = computedPropertyNamesToGeneratedNames;
+                var saveConvertedLoopState = convertedLoopState;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                computedPropertyNamesToGeneratedNames = undefined;
+                increaseIndent();
+                if (baseTypeNode) {
+                    writeLine();
+                    emitStart(baseTypeNode);
+                    write("__extends(");
+                    emitDeclarationName(node);
+                    write(", _super);");
+                    emitEnd(baseTypeNode);
+                }
+                writeLine();
+                emitConstructor(node, baseTypeNode);
+                emitMemberFunctionsForES5AndLower(node);
+                emitPropertyDeclarations(node, getInitializedProperties(node, true));
+                writeLine();
+                emitDecoratorsOfClass(node, undefined);
+                writeLine();
+                emitToken(16, node.members.end, function () {
+                    write("return ");
+                    emitDeclarationName(node);
+                });
+                write(";");
+                emitTempDeclarations(true);
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+                computedPropertyNamesToGeneratedNames = saveComputedPropertyNamesToGeneratedNames;
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.members.end);
+                emitStart(node);
+                write("(");
+                if (baseTypeNode) {
+                    emit(baseTypeNode.expression);
+                }
+                write("))");
+                if (node.kind === 221) {
+                    write(";");
+                }
+                emitEnd(node);
+                if (node.kind === 221) {
+                    emitExportMemberAssignment(node);
+                }
+            }
+            function emitClassMemberPrefix(node, member) {
+                emitDeclarationName(node);
+                if (!(member.flags & 32)) {
+                    write(".prototype");
+                }
+            }
+            function emitDecoratorsOfClass(node, decoratedClassAlias) {
+                emitDecoratorsOfMembers(node, 0);
+                emitDecoratorsOfMembers(node, 32);
+                emitDecoratorsOfConstructor(node, decoratedClassAlias);
+            }
+            function emitDecoratorsOfConstructor(node, decoratedClassAlias) {
+                var decorators = node.decorators;
+                var constructor = ts.getFirstConstructorWithBody(node);
+                var firstParameterDecorator = constructor && ts.forEach(constructor.parameters, function (parameter) { return parameter.decorators; });
+                if (!decorators && !firstParameterDecorator) {
+                    return;
+                }
+                writeLine();
+                emitStart(node.decorators || firstParameterDecorator);
+                emitDeclarationName(node);
+                if (decoratedClassAlias !== undefined) {
+                    write(" = " + decoratedClassAlias);
+                }
+                write(" = __decorate([");
+                increaseIndent();
+                writeLine();
+                var decoratorCount = decorators ? decorators.length : 0;
+                var argumentsWritten = emitList(decorators, 0, decoratorCount, true, false, false, true, function (decorator) { return emit(decorator.expression); });
+                if (firstParameterDecorator) {
+                    argumentsWritten += emitDecoratorsOfParameters(constructor, argumentsWritten > 0);
+                }
+                emitSerializedTypeMetadata(node, argumentsWritten >= 0);
+                decreaseIndent();
+                writeLine();
+                write("], ");
+                emitDeclarationName(node);
+                write(")");
+                emitEnd(node.decorators || firstParameterDecorator);
+                write(";");
+                writeLine();
+            }
+            function emitDecoratorsOfMembers(node, staticFlag) {
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    if ((member.flags & 32) !== staticFlag) {
+                        continue;
+                    }
+                    if (!ts.nodeCanBeDecorated(member)) {
+                        continue;
+                    }
+                    var decorators = void 0;
+                    var functionLikeMember = void 0;
+                    if (ts.isAccessor(member)) {
+                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
+                        if (member !== accessors.firstAccessor) {
+                            continue;
+                        }
+                        decorators = accessors.firstAccessor.decorators;
+                        if (!decorators && accessors.secondAccessor) {
+                            decorators = accessors.secondAccessor.decorators;
+                        }
+                        functionLikeMember = accessors.setAccessor;
+                    }
+                    else {
+                        decorators = member.decorators;
+                        if (member.kind === 147) {
+                            functionLikeMember = member;
+                        }
+                    }
+                    var firstParameterDecorator = functionLikeMember && ts.forEach(functionLikeMember.parameters, function (parameter) { return parameter.decorators; });
+                    if (!decorators && !firstParameterDecorator) {
+                        continue;
+                    }
+                    writeLine();
+                    emitStart(decorators || firstParameterDecorator);
+                    write("__decorate([");
+                    increaseIndent();
+                    writeLine();
+                    var decoratorCount = decorators ? decorators.length : 0;
+                    var argumentsWritten = emitList(decorators, 0, decoratorCount, true, false, false, true, function (decorator) { return emit(decorator.expression); });
+                    if (firstParameterDecorator) {
+                        argumentsWritten += emitDecoratorsOfParameters(functionLikeMember, argumentsWritten > 0);
+                    }
+                    emitSerializedTypeMetadata(member, argumentsWritten > 0);
+                    decreaseIndent();
+                    writeLine();
+                    write("], ");
+                    emitClassMemberPrefix(node, member);
+                    write(", ");
+                    emitExpressionForPropertyName(member.name);
+                    if (languageVersion > 0) {
+                        if (member.kind !== 145) {
+                            write(", null");
+                        }
+                        else {
+                            write(", void 0");
+                        }
+                    }
+                    write(")");
+                    emitEnd(decorators || firstParameterDecorator);
+                    write(";");
+                    writeLine();
+                }
+            }
+            function emitDecoratorsOfParameters(node, leadingComma) {
+                var argumentsWritten = 0;
+                if (node) {
+                    var parameterIndex_1 = 0;
+                    for (var _a = 0, _b = node.parameters; _a < _b.length; _a++) {
+                        var parameter = _b[_a];
+                        if (ts.nodeIsDecorated(parameter)) {
+                            var decorators = parameter.decorators;
+                            argumentsWritten += emitList(decorators, 0, decorators.length, true, false, leadingComma, true, function (decorator) {
+                                write("__param(" + parameterIndex_1 + ", ");
+                                emit(decorator.expression);
+                                write(")");
+                            });
+                            leadingComma = true;
+                        }
+                        parameterIndex_1++;
+                    }
+                }
+                return argumentsWritten;
+            }
+            function shouldEmitTypeMetadata(node) {
+                switch (node.kind) {
+                    case 147:
+                    case 149:
+                    case 150:
+                    case 145:
+                        return true;
+                }
+                return false;
+            }
+            function shouldEmitReturnTypeMetadata(node) {
+                switch (node.kind) {
+                    case 147:
+                        return true;
+                }
+                return false;
+            }
+            function shouldEmitParamTypesMetadata(node) {
+                switch (node.kind) {
+                    case 221:
+                    case 147:
+                    case 150:
+                        return true;
+                }
+                return false;
+            }
+            function emitSerializedTypeOfNode(node) {
+                switch (node.kind) {
+                    case 221:
+                        write("Function");
+                        return;
+                    case 145:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 142:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 149:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 150:
+                        emitSerializedTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
+                        return;
+                }
+                if (ts.isFunctionLike(node)) {
+                    write("Function");
+                    return;
+                }
+                write("void 0");
+            }
+            function emitSerializedTypeNode(node) {
+                if (node) {
+                    switch (node.kind) {
+                        case 103:
+                            write("void 0");
+                            return;
+                        case 164:
+                            emitSerializedTypeNode(node.type);
+                            return;
+                        case 156:
+                        case 157:
+                            write("Function");
+                            return;
+                        case 160:
+                        case 161:
+                            write("Array");
+                            return;
+                        case 154:
+                        case 120:
+                            write("Boolean");
+                            return;
+                        case 132:
+                        case 166:
+                            write("String");
+                            return;
+                        case 130:
+                            write("Number");
+                            return;
+                        case 133:
+                            write("Symbol");
+                            return;
+                        case 155:
+                            emitSerializedTypeReferenceNode(node);
+                            return;
+                        case 158:
+                        case 159:
+                        case 162:
+                        case 163:
+                        case 117:
+                        case 165:
+                            break;
+                        default:
+                            ts.Debug.fail("Cannot serialize unexpected type node.");
+                            break;
+                    }
+                }
+                write("Object");
+            }
+            function emitSerializedTypeReferenceNode(node) {
+                var location = node.parent;
+                while (ts.isDeclaration(location) || ts.isTypeNode(location)) {
+                    location = location.parent;
+                }
+                var typeName = ts.cloneEntityName(node.typeName, location);
+                var result = resolver.getTypeReferenceSerializationKind(typeName);
+                switch (result) {
+                    case ts.TypeReferenceSerializationKind.Unknown:
+                        var temp = createAndRecordTempVariable(0);
+                        write("(typeof (");
+                        emitNodeWithoutSourceMap(temp);
+                        write(" = ");
+                        emitEntityNameAsExpression(typeName, true);
+                        write(") === 'function' && ");
+                        emitNodeWithoutSourceMap(temp);
+                        write(") || Object");
+                        break;
+                    case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
+                        emitEntityNameAsExpression(typeName, false);
+                        break;
+                    case ts.TypeReferenceSerializationKind.VoidType:
+                        write("void 0");
+                        break;
+                    case ts.TypeReferenceSerializationKind.BooleanType:
+                        write("Boolean");
+                        break;
+                    case ts.TypeReferenceSerializationKind.NumberLikeType:
+                        write("Number");
+                        break;
+                    case ts.TypeReferenceSerializationKind.StringLikeType:
+                        write("String");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ArrayLikeType:
+                        write("Array");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ESSymbolType:
+                        if (languageVersion < 2) {
+                            write("typeof Symbol === 'function' ? Symbol : Object");
+                        }
+                        else {
+                            write("Symbol");
+                        }
+                        break;
+                    case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
+                        write("Function");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ObjectType:
+                        write("Object");
+                        break;
+                }
+            }
+            function emitSerializedParameterTypesOfNode(node) {
+                if (node) {
+                    var valueDeclaration = void 0;
+                    if (node.kind === 221) {
+                        valueDeclaration = ts.getFirstConstructorWithBody(node);
+                    }
+                    else if (ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)) {
+                        valueDeclaration = node;
+                    }
+                    if (valueDeclaration) {
+                        var parameters = valueDeclaration.parameters;
+                        var parameterCount = parameters.length;
+                        if (parameterCount > 0) {
+                            for (var i = 0; i < parameterCount; i++) {
+                                if (i > 0) {
+                                    write(", ");
+                                }
+                                if (parameters[i].dotDotDotToken) {
+                                    var parameterType = parameters[i].type;
+                                    if (parameterType.kind === 160) {
+                                        parameterType = parameterType.elementType;
+                                    }
+                                    else if (parameterType.kind === 155 && parameterType.typeArguments && parameterType.typeArguments.length === 1) {
+                                        parameterType = parameterType.typeArguments[0];
+                                    }
+                                    else {
+                                        parameterType = undefined;
+                                    }
+                                    emitSerializedTypeNode(parameterType);
+                                }
+                                else {
+                                    emitSerializedTypeOfNode(parameters[i]);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            function emitSerializedReturnTypeOfNode(node) {
+                if (node && ts.isFunctionLike(node) && node.type) {
+                    emitSerializedTypeNode(node.type);
+                    return;
+                }
+                write("void 0");
+            }
+            function emitSerializedTypeMetadata(node, writeComma) {
+                var argumentsWritten = 0;
+                if (compilerOptions.emitDecoratorMetadata) {
+                    if (shouldEmitTypeMetadata(node)) {
+                        if (writeComma) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:type', ");
+                        emitSerializedTypeOfNode(node);
+                        write(")");
+                        argumentsWritten++;
+                    }
+                    if (shouldEmitParamTypesMetadata(node)) {
+                        if (writeComma || argumentsWritten) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:paramtypes', [");
+                        emitSerializedParameterTypesOfNode(node);
+                        write("])");
+                        argumentsWritten++;
+                    }
+                    if (shouldEmitReturnTypeMetadata(node)) {
+                        if (writeComma || argumentsWritten) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:returntype', ");
+                        emitSerializedReturnTypeOfNode(node);
+                        write(")");
+                        argumentsWritten++;
+                    }
+                }
+                return argumentsWritten;
+            }
+            function emitInterfaceDeclaration(node) {
+                emitCommentsOnNotEmittedNode(node);
+            }
+            function shouldEmitEnumDeclaration(node) {
+                var isConstEnum = ts.isConst(node);
+                return !isConstEnum || compilerOptions.preserveConstEnums || compilerOptions.isolatedModules;
+            }
+            function emitEnumDeclaration(node) {
+                if (!shouldEmitEnumDeclaration(node)) {
+                    return;
+                }
+                if (!shouldHoistDeclarationInSystemJsModule(node)) {
+                    var isES6ExportedEnum = isES6ExportedDeclaration(node);
+                    if (!(node.flags & 1) || (isES6ExportedEnum && isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 224))) {
+                        emitStart(node);
+                        if (isES6ExportedEnum) {
+                            write("export ");
+                        }
+                        write("var ");
+                        emit(node.name);
+                        emitEnd(node);
+                        write(";");
+                    }
+                }
+                writeLine();
+                emitStart(node);
+                write("(function (");
+                emitStart(node.name);
+                write(getGeneratedNameForNode(node));
+                emitEnd(node.name);
+                write(") {");
+                increaseIndent();
+                emitLines(node.members);
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.members.end);
+                write(")(");
+                emitModuleMemberName(node);
+                write(" || (");
+                emitModuleMemberName(node);
+                write(" = {}));");
+                emitEnd(node);
+                if (!isES6ExportedDeclaration(node) && node.flags & 1 && !shouldHoistDeclarationInSystemJsModule(node)) {
+                    writeLine();
+                    emitStart(node);
+                    write("var ");
+                    emit(node.name);
+                    write(" = ");
+                    emitModuleMemberName(node);
+                    emitEnd(node);
+                    write(";");
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
+                    if (modulekind === ts.ModuleKind.System && (node.flags & 1)) {
+                        writeLine();
+                        write(exportFunctionForFile + "(\"");
+                        emitDeclarationName(node);
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(");");
+                    }
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            function emitEnumMember(node) {
+                var enumParent = node.parent;
+                emitStart(node);
+                write(getGeneratedNameForNode(enumParent));
+                write("[");
+                write(getGeneratedNameForNode(enumParent));
+                write("[");
+                emitExpressionForPropertyName(node.name);
+                write("] = ");
+                writeEnumMemberDeclarationValue(node);
+                write("] = ");
+                emitExpressionForPropertyName(node.name);
+                emitEnd(node);
+                write(";");
+            }
+            function writeEnumMemberDeclarationValue(member) {
+                var value = resolver.getConstantValue(member);
+                if (value !== undefined) {
+                    write(value.toString());
+                    return;
+                }
+                else if (member.initializer) {
+                    emit(member.initializer);
+                }
+                else {
+                    write("undefined");
+                }
+            }
+            function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
+                if (moduleDeclaration.body.kind === 225) {
+                    var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
+                    return recursiveInnerModule || moduleDeclaration.body;
+                }
+            }
+            function shouldEmitModuleDeclaration(node) {
+                return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules);
+            }
+            function isModuleMergedWithES6Class(node) {
+                return languageVersion === 2 && !!(resolver.getNodeCheckFlags(node) & 32768);
+            }
+            function isFirstDeclarationOfKind(node, declarations, kind) {
+                return !ts.forEach(declarations, function (declaration) { return declaration.kind === kind && declaration.pos < node.pos; });
+            }
+            function emitModuleDeclaration(node) {
+                var shouldEmit = shouldEmitModuleDeclaration(node);
+                if (!shouldEmit) {
+                    return emitCommentsOnNotEmittedNode(node);
+                }
+                var hoistedInDeclarationScope = shouldHoistDeclarationInSystemJsModule(node);
+                var emitVarForModule = !hoistedInDeclarationScope && !isModuleMergedWithES6Class(node);
+                if (emitVarForModule) {
+                    var isES6ExportedNamespace = isES6ExportedDeclaration(node);
+                    if (!isES6ExportedNamespace || isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 225)) {
+                        emitStart(node);
+                        if (isES6ExportedNamespace) {
+                            write("export ");
+                        }
+                        write("var ");
+                        emit(node.name);
+                        write(";");
+                        emitEnd(node);
+                        writeLine();
+                    }
+                }
+                emitStart(node);
+                write("(function (");
+                emitStart(node.name);
+                write(getGeneratedNameForNode(node));
+                emitEnd(node.name);
+                write(") ");
+                if (node.body.kind === 226) {
+                    var saveConvertedLoopState = convertedLoopState;
+                    var saveTempFlags = tempFlags;
+                    var saveTempVariables = tempVariables;
+                    convertedLoopState = undefined;
+                    tempFlags = 0;
+                    tempVariables = undefined;
+                    emit(node.body);
+                    ts.Debug.assert(convertedLoopState === undefined);
+                    convertedLoopState = saveConvertedLoopState;
+                    tempFlags = saveTempFlags;
+                    tempVariables = saveTempVariables;
+                }
+                else {
+                    write("{");
+                    increaseIndent();
+                    emitCaptureThisForNodeIfNecessary(node);
+                    writeLine();
+                    emit(node.body);
+                    decreaseIndent();
+                    writeLine();
+                    var moduleBlock = getInnerMostModuleDeclarationFromDottedModule(node).body;
+                    emitToken(16, moduleBlock.statements.end);
+                }
+                write(")(");
+                if ((node.flags & 1) && !isES6ExportedDeclaration(node)) {
+                    emit(node.name);
+                    write(" = ");
+                }
+                emitModuleMemberName(node);
+                write(" || (");
+                emitModuleMemberName(node);
+                write(" = {}));");
+                emitEnd(node);
+                if (!isES6ExportedDeclaration(node) && node.name.kind === 69 && node.parent === currentSourceFile) {
+                    if (modulekind === ts.ModuleKind.System && (node.flags & 1)) {
+                        writeLine();
+                        write(exportFunctionForFile + "(\"");
+                        emitDeclarationName(node);
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(");");
+                    }
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            function tryRenameExternalModule(moduleName) {
+                if (renamedDependencies && ts.hasProperty(renamedDependencies, moduleName.text)) {
+                    return "\"" + renamedDependencies[moduleName.text] + "\"";
+                }
+                return undefined;
+            }
+            function emitRequire(moduleName) {
+                if (moduleName.kind === 9) {
+                    write("require(");
+                    var text = tryRenameExternalModule(moduleName);
+                    if (text) {
+                        write(text);
+                    }
+                    else {
+                        emitStart(moduleName);
+                        emitLiteral(moduleName);
+                        emitEnd(moduleName);
+                    }
+                    emitToken(18, moduleName.end);
+                }
+                else {
+                    write("require()");
+                }
+            }
+            function getNamespaceDeclarationNode(node) {
+                if (node.kind === 229) {
+                    return node;
+                }
+                var importClause = node.importClause;
+                if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232) {
+                    return importClause.namedBindings;
+                }
+            }
+            function isDefaultImport(node) {
+                return node.kind === 230 && node.importClause && !!node.importClause.name;
+            }
+            function emitExportImportAssignments(node) {
+                if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
+                    emitExportMemberAssignments(node.name);
+                }
+                ts.forEachChild(node, emitExportImportAssignments);
+            }
+            function emitImportDeclaration(node) {
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    return emitExternalImportDeclaration(node);
+                }
+                if (node.importClause) {
+                    var shouldEmitDefaultBindings = resolver.isReferencedAliasDeclaration(node.importClause);
+                    var shouldEmitNamedBindings = node.importClause.namedBindings && resolver.isReferencedAliasDeclaration(node.importClause.namedBindings, true);
+                    if (shouldEmitDefaultBindings || shouldEmitNamedBindings) {
+                        write("import ");
+                        emitStart(node.importClause);
+                        if (shouldEmitDefaultBindings) {
+                            emit(node.importClause.name);
+                            if (shouldEmitNamedBindings) {
+                                write(", ");
+                            }
+                        }
+                        if (shouldEmitNamedBindings) {
+                            emitLeadingComments(node.importClause.namedBindings);
+                            emitStart(node.importClause.namedBindings);
+                            if (node.importClause.namedBindings.kind === 232) {
+                                write("* as ");
+                                emit(node.importClause.namedBindings.name);
+                            }
+                            else {
+                                write("{ ");
+                                emitExportOrImportSpecifierList(node.importClause.namedBindings.elements, resolver.isReferencedAliasDeclaration);
+                                write(" }");
+                            }
+                            emitEnd(node.importClause.namedBindings);
+                            emitTrailingComments(node.importClause.namedBindings);
+                        }
+                        emitEnd(node.importClause);
+                        write(" from ");
+                        emit(node.moduleSpecifier);
+                        write(";");
+                    }
+                }
+                else {
+                    write("import ");
+                    emit(node.moduleSpecifier);
+                    write(";");
+                }
+            }
+            function emitExternalImportDeclaration(node) {
+                if (ts.contains(externalImports, node)) {
+                    var isExportedImport = node.kind === 229 && (node.flags & 1) !== 0;
+                    var namespaceDeclaration = getNamespaceDeclarationNode(node);
+                    var varOrConst = (languageVersion <= 1) ? "var " : "const ";
+                    if (modulekind !== ts.ModuleKind.AMD) {
+                        emitLeadingComments(node);
+                        emitStart(node);
+                        if (namespaceDeclaration && !isDefaultImport(node)) {
+                            if (!isExportedImport) {
+                                write(varOrConst);
+                            }
+                            ;
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                        }
+                        else {
+                            var isNakedImport = 230 && !node.importClause;
+                            if (!isNakedImport) {
+                                write(varOrConst);
+                                write(getGeneratedNameForNode(node));
+                                write(" = ");
+                            }
+                        }
+                        emitRequire(ts.getExternalModuleName(node));
+                        if (namespaceDeclaration && isDefaultImport(node)) {
+                            write(", ");
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            write(getGeneratedNameForNode(node));
+                        }
+                        write(";");
+                        emitEnd(node);
+                        emitExportImportAssignments(node);
+                        emitTrailingComments(node);
+                    }
+                    else {
+                        if (isExportedImport) {
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            emit(namespaceDeclaration.name);
+                            write(";");
+                        }
+                        else if (namespaceDeclaration && isDefaultImport(node)) {
+                            write(varOrConst);
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            write(getGeneratedNameForNode(node));
+                            write(";");
+                        }
+                        emitExportImportAssignments(node);
+                    }
+                }
+            }
+            function emitImportEqualsDeclaration(node) {
+                if (ts.isExternalModuleImportEqualsDeclaration(node)) {
+                    emitExternalImportDeclaration(node);
+                    return;
+                }
+                if (resolver.isReferencedAliasDeclaration(node) ||
+                    (!isCurrentFileExternalModule && resolver.isTopLevelValueImportEqualsWithEntityName(node))) {
+                    emitLeadingComments(node);
+                    emitStart(node);
+                    var variableDeclarationIsHoisted = shouldHoistVariable(node, true);
+                    var isExported = isSourceFileLevelDeclarationInSystemJsModule(node, true);
+                    if (!variableDeclarationIsHoisted) {
+                        ts.Debug.assert(!isExported);
+                        if (isES6ExportedDeclaration(node)) {
+                            write("export ");
+                            write("var ");
+                        }
+                        else if (!(node.flags & 1)) {
+                            write("var ");
+                        }
+                    }
+                    if (isExported) {
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithoutSourceMap(node.name);
+                        write("\", ");
+                    }
+                    emitModuleMemberName(node);
+                    write(" = ");
+                    emit(node.moduleReference);
+                    if (isExported) {
+                        write(")");
+                    }
+                    write(";");
+                    emitEnd(node);
+                    emitExportImportAssignments(node);
+                    emitTrailingComments(node);
+                }
+            }
+            function emitExportDeclaration(node) {
+                ts.Debug.assert(modulekind !== ts.ModuleKind.System);
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    if (node.moduleSpecifier && (!node.exportClause || resolver.isValueAliasDeclaration(node))) {
+                        emitStart(node);
+                        var generatedName = getGeneratedNameForNode(node);
+                        if (node.exportClause) {
+                            if (modulekind !== ts.ModuleKind.AMD) {
+                                write("var ");
+                                write(generatedName);
+                                write(" = ");
+                                emitRequire(ts.getExternalModuleName(node));
+                                write(";");
+                            }
+                            for (var _a = 0, _b = node.exportClause.elements; _a < _b.length; _a++) {
+                                var specifier = _b[_a];
+                                if (resolver.isValueAliasDeclaration(specifier)) {
+                                    writeLine();
+                                    emitStart(specifier);
+                                    emitContainingModuleName(specifier);
+                                    write(".");
+                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                                    write(" = ");
+                                    write(generatedName);
+                                    write(".");
+                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.propertyName || specifier.name);
+                                    write(";");
+                                    emitEnd(specifier);
+                                }
+                            }
+                        }
+                        else {
+                            if (hasExportStarsToExportValues && resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
+                                writeLine();
+                                write("__export(");
+                                if (modulekind !== ts.ModuleKind.AMD) {
+                                    emitRequire(ts.getExternalModuleName(node));
+                                }
+                                else {
+                                    write(generatedName);
+                                }
+                                write(");");
+                            }
+                        }
+                        emitEnd(node);
+                    }
+                }
+                else {
+                    if (!node.exportClause || resolver.isValueAliasDeclaration(node)) {
+                        write("export ");
+                        if (node.exportClause) {
+                            write("{ ");
+                            emitExportOrImportSpecifierList(node.exportClause.elements, resolver.isValueAliasDeclaration);
+                            write(" }");
+                        }
+                        else {
+                            write("*");
+                        }
+                        if (node.moduleSpecifier) {
+                            write(" from ");
+                            emit(node.moduleSpecifier);
+                        }
+                        write(";");
+                    }
+                }
+            }
+            function emitExportOrImportSpecifierList(specifiers, shouldEmit) {
+                ts.Debug.assert(modulekind === ts.ModuleKind.ES6);
+                var needsComma = false;
+                for (var _a = 0, specifiers_1 = specifiers; _a < specifiers_1.length; _a++) {
+                    var specifier = specifiers_1[_a];
+                    if (shouldEmit(specifier)) {
+                        if (needsComma) {
+                            write(", ");
+                        }
+                        if (specifier.propertyName) {
+                            emit(specifier.propertyName);
+                            write(" as ");
+                        }
+                        emit(specifier.name);
+                        needsComma = true;
+                    }
+                }
+            }
+            function emitExportAssignment(node) {
+                if (!node.isExportEquals && resolver.isValueAliasDeclaration(node)) {
+                    if (modulekind === ts.ModuleKind.ES6) {
+                        writeLine();
+                        emitStart(node);
+                        write("export default ");
+                        var expression = node.expression;
+                        emit(expression);
+                        if (expression.kind !== 220 &&
+                            expression.kind !== 221) {
+                            write(";");
+                        }
+                        emitEnd(node);
+                    }
+                    else {
+                        writeLine();
+                        emitStart(node);
+                        if (modulekind === ts.ModuleKind.System) {
+                            write(exportFunctionForFile + "(\"default\",");
+                            emit(node.expression);
+                            write(")");
+                        }
+                        else {
+                            emitEs6ExportDefaultCompat(node);
+                            emitContainingModuleName(node);
+                            if (languageVersion === 0) {
+                                write('["default"] = ');
+                            }
+                            else {
+                                write(".default = ");
+                            }
+                            emit(node.expression);
+                        }
+                        write(";");
+                        emitEnd(node);
+                    }
+                }
+            }
+            function collectExternalModuleInfo(sourceFile) {
+                externalImports = [];
+                exportSpecifiers = {};
+                exportEquals = undefined;
+                hasExportStarsToExportValues = false;
+                for (var _a = 0, _b = sourceFile.statements; _a < _b.length; _a++) {
+                    var node = _b[_a];
+                    switch (node.kind) {
+                        case 230:
+                            if (!node.importClause ||
+                                resolver.isReferencedAliasDeclaration(node.importClause, true)) {
+                                externalImports.push(node);
+                            }
+                            break;
+                        case 229:
+                            if (node.moduleReference.kind === 240 && resolver.isReferencedAliasDeclaration(node)) {
+                                externalImports.push(node);
+                            }
+                            break;
+                        case 236:
+                            if (node.moduleSpecifier) {
+                                if (!node.exportClause) {
+                                    if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
+                                        externalImports.push(node);
+                                        hasExportStarsToExportValues = true;
+                                    }
+                                }
+                                else if (resolver.isValueAliasDeclaration(node)) {
+                                    externalImports.push(node);
+                                }
+                            }
+                            else {
+                                for (var _c = 0, _d = node.exportClause.elements; _c < _d.length; _c++) {
+                                    var specifier = _d[_c];
+                                    var name_30 = (specifier.propertyName || specifier.name).text;
+                                    (exportSpecifiers[name_30] || (exportSpecifiers[name_30] = [])).push(specifier);
+                                }
+                            }
+                            break;
+                        case 235:
+                            if (node.isExportEquals && !exportEquals) {
+                                exportEquals = node;
+                            }
+                            break;
+                    }
+                }
+            }
+            function emitExportStarHelper() {
+                if (hasExportStarsToExportValues) {
+                    writeLine();
+                    write("function __export(m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function getLocalNameForExternalImport(node) {
+                var namespaceDeclaration = getNamespaceDeclarationNode(node);
+                if (namespaceDeclaration && !isDefaultImport(node)) {
+                    return ts.getTextOfNodeFromSourceText(currentText, namespaceDeclaration.name);
+                }
+                if (node.kind === 230 && node.importClause) {
+                    return getGeneratedNameForNode(node);
+                }
+                if (node.kind === 236 && node.moduleSpecifier) {
+                    return getGeneratedNameForNode(node);
+                }
+            }
+            function getExternalModuleNameText(importNode, emitRelativePathAsModuleName) {
+                if (emitRelativePathAsModuleName) {
+                    var name_31 = getExternalModuleNameFromDeclaration(host, resolver, importNode);
+                    if (name_31) {
+                        return "\"" + name_31 + "\"";
+                    }
+                }
+                var moduleName = ts.getExternalModuleName(importNode);
+                if (moduleName.kind === 9) {
+                    return tryRenameExternalModule(moduleName) || getLiteralText(moduleName);
+                }
+                return undefined;
+            }
+            function emitVariableDeclarationsForImports() {
+                if (externalImports.length === 0) {
+                    return;
+                }
+                writeLine();
+                var started = false;
+                for (var _a = 0, externalImports_1 = externalImports; _a < externalImports_1.length; _a++) {
+                    var importNode = externalImports_1[_a];
+                    var skipNode = importNode.kind === 236 ||
+                        (importNode.kind === 230 && !importNode.importClause);
+                    if (skipNode) {
+                        continue;
+                    }
+                    if (!started) {
+                        write("var ");
+                        started = true;
+                    }
+                    else {
+                        write(", ");
+                    }
+                    write(getLocalNameForExternalImport(importNode));
+                }
+                if (started) {
+                    write(";");
+                }
+            }
+            function emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations) {
+                if (!hasExportStarsToExportValues) {
+                    return undefined;
+                }
+                if (!exportedDeclarations && ts.isEmpty(exportSpecifiers)) {
+                    var hasExportDeclarationWithExportClause = false;
+                    for (var _a = 0, externalImports_2 = externalImports; _a < externalImports_2.length; _a++) {
+                        var externalImport = externalImports_2[_a];
+                        if (externalImport.kind === 236 && externalImport.exportClause) {
+                            hasExportDeclarationWithExportClause = true;
+                            break;
+                        }
+                    }
+                    if (!hasExportDeclarationWithExportClause) {
+                        return emitExportStarFunction(undefined);
+                    }
+                }
+                var exportedNamesStorageRef = makeUniqueName("exportedNames");
+                writeLine();
+                write("var " + exportedNamesStorageRef + " = {");
+                increaseIndent();
+                var started = false;
+                if (exportedDeclarations) {
+                    for (var i = 0; i < exportedDeclarations.length; i++) {
+                        writeExportedName(exportedDeclarations[i]);
+                    }
+                }
+                if (exportSpecifiers) {
+                    for (var n in exportSpecifiers) {
+                        for (var _b = 0, _c = exportSpecifiers[n]; _b < _c.length; _b++) {
+                            var specifier = _c[_b];
+                            writeExportedName(specifier.name);
+                        }
+                    }
+                }
+                for (var _d = 0, externalImports_3 = externalImports; _d < externalImports_3.length; _d++) {
+                    var externalImport = externalImports_3[_d];
+                    if (externalImport.kind !== 236) {
+                        continue;
+                    }
+                    var exportDecl = externalImport;
+                    if (!exportDecl.exportClause) {
+                        continue;
+                    }
+                    for (var _e = 0, _f = exportDecl.exportClause.elements; _e < _f.length; _e++) {
+                        var element = _f[_e];
+                        writeExportedName(element.name || element.propertyName);
+                    }
+                }
+                decreaseIndent();
+                writeLine();
+                write("};");
+                return emitExportStarFunction(exportedNamesStorageRef);
+                function emitExportStarFunction(localNames) {
+                    var exportStarFunction = makeUniqueName("exportStar");
+                    writeLine();
+                    write("function " + exportStarFunction + "(m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("var exports = {};");
+                    writeLine();
+                    write("for(var n in m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("if (n !== \"default\"");
+                    if (localNames) {
+                        write("&& !" + localNames + ".hasOwnProperty(n)");
+                    }
+                    write(") exports[n] = m[n];");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                    writeLine();
+                    write(exportFunctionForFile + "(exports);");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                    return exportStarFunction;
+                }
+                function writeExportedName(node) {
+                    if (node.kind !== 69 && node.flags & 512) {
+                        return;
+                    }
+                    if (started) {
+                        write(",");
+                    }
+                    else {
+                        started = true;
+                    }
+                    writeLine();
+                    write("'");
+                    if (node.kind === 69) {
+                        emitNodeWithCommentsAndWithoutSourcemap(node);
+                    }
+                    else {
+                        emitDeclarationName(node);
+                    }
+                    write("': true");
+                }
+            }
+            function processTopLevelVariableAndFunctionDeclarations(node) {
+                var hoistedVars;
+                var hoistedFunctionDeclarations;
+                var exportedDeclarations;
+                visit(node);
+                if (hoistedVars) {
+                    writeLine();
+                    write("var ");
+                    var seen = {};
+                    for (var i = 0; i < hoistedVars.length; i++) {
+                        var local = hoistedVars[i];
+                        var name_32 = local.kind === 69
+                            ? local
+                            : local.name;
+                        if (name_32) {
+                            var text = ts.unescapeIdentifier(name_32.text);
+                            if (ts.hasProperty(seen, text)) {
+                                continue;
+                            }
+                            else {
+                                seen[text] = text;
+                            }
+                        }
+                        if (i !== 0) {
+                            write(", ");
+                        }
+                        if (local.kind === 221 || local.kind === 225 || local.kind === 224) {
+                            emitDeclarationName(local);
+                        }
+                        else {
+                            emit(local);
+                        }
+                        var flags = ts.getCombinedNodeFlags(local.kind === 69 ? local.parent : local);
+                        if (flags & 1) {
+                            if (!exportedDeclarations) {
+                                exportedDeclarations = [];
+                            }
+                            exportedDeclarations.push(local);
+                        }
+                    }
+                    write(";");
+                }
+                if (hoistedFunctionDeclarations) {
+                    for (var _a = 0, hoistedFunctionDeclarations_1 = hoistedFunctionDeclarations; _a < hoistedFunctionDeclarations_1.length; _a++) {
+                        var f = hoistedFunctionDeclarations_1[_a];
+                        writeLine();
+                        emit(f);
+                        if (f.flags & 1) {
+                            if (!exportedDeclarations) {
+                                exportedDeclarations = [];
+                            }
+                            exportedDeclarations.push(f);
+                        }
+                    }
+                }
+                return exportedDeclarations;
+                function visit(node) {
+                    if (node.flags & 2) {
+                        return;
+                    }
+                    if (node.kind === 220) {
+                        if (!hoistedFunctionDeclarations) {
+                            hoistedFunctionDeclarations = [];
+                        }
+                        hoistedFunctionDeclarations.push(node);
+                        return;
+                    }
+                    if (node.kind === 221) {
+                        if (!hoistedVars) {
+                            hoistedVars = [];
+                        }
+                        hoistedVars.push(node);
+                        return;
+                    }
+                    if (node.kind === 224) {
+                        if (shouldEmitEnumDeclaration(node)) {
+                            if (!hoistedVars) {
+                                hoistedVars = [];
+                            }
+                            hoistedVars.push(node);
+                        }
+                        return;
+                    }
+                    if (node.kind === 225) {
+                        if (shouldEmitModuleDeclaration(node)) {
+                            if (!hoistedVars) {
+                                hoistedVars = [];
+                            }
+                            hoistedVars.push(node);
+                        }
+                        return;
+                    }
+                    if (node.kind === 218 || node.kind === 169) {
+                        if (shouldHoistVariable(node, false)) {
+                            var name_33 = node.name;
+                            if (name_33.kind === 69) {
+                                if (!hoistedVars) {
+                                    hoistedVars = [];
+                                }
+                                hoistedVars.push(name_33);
+                            }
+                            else {
+                                ts.forEachChild(name_33, visit);
+                            }
+                        }
+                        return;
+                    }
+                    if (ts.isInternalModuleImportEqualsDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
+                        if (!hoistedVars) {
+                            hoistedVars = [];
+                        }
+                        hoistedVars.push(node.name);
+                        return;
+                    }
+                    if (ts.isBindingPattern(node)) {
+                        ts.forEach(node.elements, visit);
+                        return;
+                    }
+                    if (!ts.isDeclaration(node)) {
+                        ts.forEachChild(node, visit);
+                    }
+                }
+            }
+            function shouldHoistVariable(node, checkIfSourceFileLevelDecl) {
+                if (checkIfSourceFileLevelDecl && !shouldHoistDeclarationInSystemJsModule(node)) {
+                    return false;
+                }
+                return (ts.getCombinedNodeFlags(node) & 3072) === 0 ||
+                    ts.getEnclosingBlockScopeContainer(node).kind === 256;
+            }
+            function isCurrentFileSystemExternalModule() {
+                return modulekind === ts.ModuleKind.System && isCurrentFileExternalModule;
+            }
+            function emitSystemModuleBody(node, dependencyGroups, startIndex) {
+                emitVariableDeclarationsForImports();
+                writeLine();
+                var exportedDeclarations = processTopLevelVariableAndFunctionDeclarations(node);
+                var exportStarFunction = emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations);
+                writeLine();
+                write("return {");
+                increaseIndent();
+                writeLine();
+                emitSetters(exportStarFunction, dependencyGroups);
+                writeLine();
+                emitExecute(node, startIndex);
+                decreaseIndent();
+                writeLine();
+                write("}");
+                emitTempDeclarations(true);
+            }
+            function emitSetters(exportStarFunction, dependencyGroups) {
+                write("setters:[");
+                for (var i = 0; i < dependencyGroups.length; i++) {
+                    if (i !== 0) {
+                        write(",");
+                    }
+                    writeLine();
+                    increaseIndent();
+                    var group = dependencyGroups[i];
+                    var parameterName = makeUniqueName(ts.forEach(group, getLocalNameForExternalImport) || "");
+                    write("function (" + parameterName + ") {");
+                    increaseIndent();
+                    for (var _a = 0, group_1 = group; _a < group_1.length; _a++) {
+                        var entry = group_1[_a];
+                        var importVariableName = getLocalNameForExternalImport(entry) || "";
+                        switch (entry.kind) {
+                            case 230:
+                                if (!entry.importClause) {
+                                    break;
+                                }
+                            case 229:
+                                ts.Debug.assert(importVariableName !== "");
+                                writeLine();
+                                write(importVariableName + " = " + parameterName + ";");
+                                writeLine();
+                                break;
+                            case 236:
+                                ts.Debug.assert(importVariableName !== "");
+                                if (entry.exportClause) {
+                                    writeLine();
+                                    write(exportFunctionForFile + "({");
+                                    writeLine();
+                                    increaseIndent();
+                                    for (var i_1 = 0, len = entry.exportClause.elements.length; i_1 < len; i_1++) {
+                                        if (i_1 !== 0) {
+                                            write(",");
+                                            writeLine();
+                                        }
+                                        var e = entry.exportClause.elements[i_1];
+                                        write("\"");
+                                        emitNodeWithCommentsAndWithoutSourcemap(e.name);
+                                        write("\": " + parameterName + "[\"");
+                                        emitNodeWithCommentsAndWithoutSourcemap(e.propertyName || e.name);
+                                        write("\"]");
+                                    }
+                                    decreaseIndent();
+                                    writeLine();
+                                    write("});");
+                                }
+                                else {
+                                    writeLine();
+                                    write(exportStarFunction + "(" + parameterName + ");");
+                                }
+                                writeLine();
+                                break;
+                        }
+                    }
+                    decreaseIndent();
+                    write("}");
+                    decreaseIndent();
+                }
+                write("],");
+            }
+            function emitExecute(node, startIndex) {
+                write("execute: function() {");
+                increaseIndent();
+                writeLine();
+                for (var i = startIndex; i < node.statements.length; i++) {
+                    var statement = node.statements[i];
+                    switch (statement.kind) {
+                        case 220:
+                        case 230:
+                            continue;
+                        case 236:
+                            if (!statement.moduleSpecifier) {
+                                for (var _a = 0, _b = statement.exportClause.elements; _a < _b.length; _a++) {
+                                    var element = _b[_a];
+                                    emitExportSpecifierInSystemModule(element);
+                                }
+                            }
+                            continue;
+                        case 229:
+                            if (!ts.isInternalModuleImportEqualsDeclaration(statement)) {
+                                continue;
+                            }
+                        default:
+                            writeLine();
+                            emit(statement);
+                    }
+                }
+                decreaseIndent();
+                writeLine();
+                write("}");
+            }
+            function writeModuleName(node, emitRelativePathAsModuleName) {
+                var moduleName = node.moduleName;
+                if (moduleName || (emitRelativePathAsModuleName && (moduleName = getResolvedExternalModuleName(host, node)))) {
+                    write("\"" + moduleName + "\", ");
+                }
+            }
+            function emitSystemModule(node, emitRelativePathAsModuleName) {
+                collectExternalModuleInfo(node);
+                ts.Debug.assert(!exportFunctionForFile);
+                exportFunctionForFile = makeUniqueName("exports");
+                contextObjectForFile = makeUniqueName("context");
+                writeLine();
+                write("System.register(");
+                writeModuleName(node, emitRelativePathAsModuleName);
+                write("[");
+                var groupIndices = {};
+                var dependencyGroups = [];
+                for (var i = 0; i < externalImports.length; i++) {
+                    var text = getExternalModuleNameText(externalImports[i], emitRelativePathAsModuleName);
+                    if (text === undefined) {
+                        continue;
+                    }
+                    var key = text.substr(1, text.length - 2);
+                    if (ts.hasProperty(groupIndices, key)) {
+                        var groupIndex = groupIndices[key];
+                        dependencyGroups[groupIndex].push(externalImports[i]);
+                        continue;
+                    }
+                    else {
+                        groupIndices[key] = dependencyGroups.length;
+                        dependencyGroups.push([externalImports[i]]);
+                    }
+                    if (i !== 0) {
+                        write(", ");
+                    }
+                    write(text);
+                }
+                write("], function(" + exportFunctionForFile + ", " + contextObjectForFile + ") {");
+                writeLine();
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
+                writeLine();
+                write("var __moduleName = " + contextObjectForFile + " && " + contextObjectForFile + ".id;");
+                writeLine();
+                emitEmitHelpers(node);
+                emitCaptureThisForNodeIfNecessary(node);
+                emitSystemModuleBody(node, dependencyGroups, startIndex);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
+                var aliasedModuleNames = [];
+                var unaliasedModuleNames = [];
+                var importAliasNames = [];
+                for (var _a = 0, _b = node.amdDependencies; _a < _b.length; _a++) {
+                    var amdDependency = _b[_a];
+                    if (amdDependency.name) {
+                        aliasedModuleNames.push('"' + amdDependency.path + '"');
+                        importAliasNames.push(amdDependency.name);
+                    }
+                    else {
+                        unaliasedModuleNames.push('"' + amdDependency.path + '"');
+                    }
+                }
+                for (var _c = 0, externalImports_4 = externalImports; _c < externalImports_4.length; _c++) {
+                    var importNode = externalImports_4[_c];
+                    var externalModuleName = getExternalModuleNameText(importNode, emitRelativePathAsModuleName);
+                    var importAliasName = getLocalNameForExternalImport(importNode);
+                    if (includeNonAmdDependencies && importAliasName) {
+                        aliasedModuleNames.push(externalModuleName);
+                        importAliasNames.push(importAliasName);
+                    }
+                    else {
+                        unaliasedModuleNames.push(externalModuleName);
+                    }
+                }
+                return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
+            }
+            function emitAMDDependencies(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
+                var dependencyNames = getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName);
+                emitAMDDependencyList(dependencyNames);
+                write(", ");
+                emitAMDFactoryHeader(dependencyNames);
+            }
+            function emitAMDDependencyList(_a) {
+                var aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames;
+                write('["require", "exports"');
+                if (aliasedModuleNames.length) {
+                    write(", ");
+                    write(aliasedModuleNames.join(", "));
+                }
+                if (unaliasedModuleNames.length) {
+                    write(", ");
+                    write(unaliasedModuleNames.join(", "));
+                }
+                write("]");
+            }
+            function emitAMDFactoryHeader(_a) {
+                var importAliasNames = _a.importAliasNames;
+                write("function (require, exports");
+                if (importAliasNames.length) {
+                    write(", ");
+                    write(importAliasNames.join(", "));
+                }
+                write(") {");
+            }
+            function emitAMDModule(node, emitRelativePathAsModuleName) {
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                writeLine();
+                write("define(");
+                writeModuleName(node, emitRelativePathAsModuleName);
+                emitAMDDependencies(node, true, emitRelativePathAsModuleName);
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(true);
+                emitTempDeclarations(true);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function emitCommonJSModule(node) {
+                var startIndex = emitDirectivePrologues(node.statements, false, !compilerOptions.noImplicitUseStrict);
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(false);
+                emitTempDeclarations(true);
+            }
+            function emitUMDModule(node) {
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                var dependencyNames = getAMDDependencyNames(node, false);
+                writeLines("(function (factory) {\n    if (typeof module === 'object' && typeof module.exports === 'object') {\n        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n    }\n    else if (typeof define === 'function' && define.amd) {\n        define(");
+                emitAMDDependencyList(dependencyNames);
+                write(", factory);");
+                writeLines("    }\n})(");
+                emitAMDFactoryHeader(dependencyNames);
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(true);
+                emitTempDeclarations(true);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function emitES6Module(node) {
+                externalImports = undefined;
+                exportSpecifiers = undefined;
+                exportEquals = undefined;
+                hasExportStarsToExportValues = false;
+                var startIndex = emitDirectivePrologues(node.statements, false);
+                emitEmitHelpers(node);
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitTempDeclarations(true);
+            }
+            function emitExportEquals(emitAsReturn) {
+                if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) {
+                    writeLine();
+                    emitStart(exportEquals);
+                    write(emitAsReturn ? "return " : "module.exports = ");
+                    emit(exportEquals.expression);
+                    write(";");
+                    emitEnd(exportEquals);
+                }
+            }
+            function emitJsxElement(node) {
+                switch (compilerOptions.jsx) {
+                    case 2:
+                        jsxEmitReact(node);
+                        break;
+                    case 1:
+                    default:
+                        jsxEmitPreserve(node);
+                        break;
+                }
+            }
+            function trimReactWhitespaceAndApplyEntities(node) {
+                var result = undefined;
+                var text = ts.getTextOfNode(node, true);
+                var firstNonWhitespace = 0;
+                var lastNonWhitespace = -1;
+                for (var i = 0; i < text.length; i++) {
+                    var c = text.charCodeAt(i);
+                    if (ts.isLineBreak(c)) {
+                        if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) {
+                            var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1);
+                            result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
+                        }
+                        firstNonWhitespace = -1;
+                    }
+                    else if (!ts.isWhiteSpace(c)) {
+                        lastNonWhitespace = i;
+                        if (firstNonWhitespace === -1) {
+                            firstNonWhitespace = i;
+                        }
+                    }
+                }
+                if (firstNonWhitespace !== -1) {
+                    var part = text.substr(firstNonWhitespace);
+                    result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
+                }
+                if (result) {
+                    result = result.replace(/&(\w+);/g, function (s, m) {
+                        if (entities[m] !== undefined) {
+                            var ch = String.fromCharCode(entities[m]);
+                            return ch === '"' ? "\\\"" : ch;
+                        }
+                        else {
+                            return s;
+                        }
+                    });
+                }
+                return result;
+            }
+            function isJsxChildEmittable(child) {
+                if (child.kind === 248) {
+                    return !!child.expression;
+                }
+                else if (child.kind === 244) {
+                    return !!getTextToEmit(child);
+                }
+                return true;
+            }
+            ;
+            function getTextToEmit(node) {
+                switch (compilerOptions.jsx) {
+                    case 2:
+                        var text = trimReactWhitespaceAndApplyEntities(node);
+                        if (text === undefined || text.length === 0) {
+                            return undefined;
+                        }
+                        else {
+                            return text;
+                        }
+                    case 1:
+                    default:
+                        return ts.getTextOfNode(node, true);
+                }
+            }
+            function emitJsxText(node) {
+                switch (compilerOptions.jsx) {
+                    case 2:
+                        write('"');
+                        write(trimReactWhitespaceAndApplyEntities(node));
+                        write('"');
+                        break;
+                    case 1:
+                    default:
+                        writer.writeLiteral(ts.getTextOfNode(node, true));
+                        break;
+                }
+            }
+            function emitJsxExpression(node) {
+                if (node.expression) {
+                    switch (compilerOptions.jsx) {
+                        case 1:
+                        default:
+                            write("{");
+                            emit(node.expression);
+                            write("}");
+                            break;
+                        case 2:
+                            emit(node.expression);
+                            break;
+                    }
+                }
+            }
+            function isUseStrictPrologue(node) {
+                return node.expression.text === "use strict";
+            }
+            function ensureUseStrictPrologue(startWithNewLine, writeUseStrict) {
+                if (writeUseStrict) {
+                    if (startWithNewLine) {
+                        writeLine();
+                    }
+                    write("\"use strict\";");
+                }
+            }
+            function emitDirectivePrologues(statements, startWithNewLine, ensureUseStrict) {
+                var foundUseStrict = false;
+                for (var i = 0; i < statements.length; i++) {
+                    if (ts.isPrologueDirective(statements[i])) {
+                        if (isUseStrictPrologue(statements[i])) {
+                            foundUseStrict = true;
+                        }
+                        if (startWithNewLine || i > 0) {
+                            writeLine();
+                        }
+                        emit(statements[i]);
+                    }
+                    else {
+                        ensureUseStrictPrologue(startWithNewLine || i > 0, !foundUseStrict && ensureUseStrict);
+                        return i;
+                    }
+                }
+                ensureUseStrictPrologue(startWithNewLine, !foundUseStrict && ensureUseStrict);
+                return statements.length;
+            }
+            function writeLines(text) {
+                var lines = text.split(/\r\n|\r|\n/g);
+                for (var i = 0; i < lines.length; i++) {
+                    var line = lines[i];
+                    if (line.length) {
+                        writeLine();
+                        write(line);
+                    }
+                }
+            }
+            function emitEmitHelpers(node) {
+                if (!compilerOptions.noEmitHelpers) {
+                    if (languageVersion < 2 && !extendsEmitted && node.flags & 262144) {
+                        writeLines(extendsHelper);
+                        extendsEmitted = true;
+                    }
+                    if (compilerOptions.jsx !== 1 && !assignEmitted && (node.flags & 1073741824)) {
+                        writeLines(assignHelper);
+                        assignEmitted = true;
+                    }
+                    if (!decorateEmitted && node.flags & 524288) {
+                        writeLines(decorateHelper);
+                        if (compilerOptions.emitDecoratorMetadata) {
+                            writeLines(metadataHelper);
+                        }
+                        decorateEmitted = true;
+                    }
+                    if (!paramEmitted && node.flags & 1048576) {
+                        writeLines(paramHelper);
+                        paramEmitted = true;
+                    }
+                    if (!awaiterEmitted && node.flags & 2097152) {
+                        writeLines(awaiterHelper);
+                        awaiterEmitted = true;
+                    }
+                }
+            }
+            function emitSourceFileNode(node) {
+                writeLine();
+                emitShebang();
+                emitDetachedCommentsAndUpdateCommentsInfo(node);
+                if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
+                    if (isOwnFileEmit || (!ts.isExternalModule(node) && compilerOptions.isolatedModules)) {
+                        var emitModule = moduleEmitDelegates[modulekind] || moduleEmitDelegates[ts.ModuleKind.CommonJS];
+                        emitModule(node);
+                    }
+                    else {
+                        bundleEmitDelegates[modulekind](node, true);
+                    }
+                }
+                else {
+                    var startIndex = emitDirectivePrologues(node.statements, false);
+                    externalImports = undefined;
+                    exportSpecifiers = undefined;
+                    exportEquals = undefined;
+                    hasExportStarsToExportValues = false;
+                    emitEmitHelpers(node);
+                    emitCaptureThisForNodeIfNecessary(node);
+                    emitLinesStartingAt(node.statements, startIndex);
+                    emitTempDeclarations(true);
+                }
+                emitLeadingComments(node.endOfFileToken);
+            }
+            function emit(node) {
+                emitNodeConsideringCommentsOption(node, emitNodeWithSourceMap);
+            }
+            function emitNodeWithCommentsAndWithoutSourcemap(node) {
+                emitNodeConsideringCommentsOption(node, emitNodeWithoutSourceMap);
+            }
+            function emitNodeConsideringCommentsOption(node, emitNodeConsideringSourcemap) {
+                if (node) {
+                    if (node.flags & 2) {
+                        return emitCommentsOnNotEmittedNode(node);
+                    }
+                    if (isSpecializedCommentHandling(node)) {
+                        return emitNodeWithoutSourceMap(node);
+                    }
+                    var emitComments_1 = shouldEmitLeadingAndTrailingComments(node);
+                    if (emitComments_1) {
+                        emitLeadingComments(node);
+                    }
+                    emitNodeConsideringSourcemap(node);
+                    if (emitComments_1) {
+                        emitTrailingComments(node);
+                    }
+                }
+            }
+            function emitNodeWithSourceMap(node) {
+                if (node) {
+                    emitStart(node);
+                    emitNodeWithoutSourceMap(node);
+                    emitEnd(node);
+                }
+            }
+            function emitNodeWithoutSourceMap(node) {
+                if (node) {
+                    emitJavaScriptWorker(node);
+                }
+            }
+            function changeSourceMapEmit(writer) {
+                sourceMap = writer;
+                emitStart = writer.emitStart;
+                emitEnd = writer.emitEnd;
+                emitPos = writer.emitPos;
+                setSourceFile = writer.setSourceFile;
+            }
+            function withTemporaryNoSourceMap(callback) {
+                var prevSourceMap = sourceMap;
+                setSourceMapWriterEmit(ts.getNullSourceMapWriter());
+                callback();
+                setSourceMapWriterEmit(prevSourceMap);
+            }
+            function isSpecializedCommentHandling(node) {
+                switch (node.kind) {
+                    case 222:
+                    case 220:
+                    case 230:
+                    case 229:
+                    case 223:
+                    case 235:
+                        return true;
+                }
+            }
+            function shouldEmitLeadingAndTrailingComments(node) {
+                switch (node.kind) {
+                    case 200:
+                        return shouldEmitLeadingAndTrailingCommentsForVariableStatement(node);
+                    case 225:
+                        return shouldEmitModuleDeclaration(node);
+                    case 224:
+                        return shouldEmitEnumDeclaration(node);
+                }
+                ts.Debug.assert(!isSpecializedCommentHandling(node));
+                if (node.kind !== 199 &&
+                    node.parent &&
+                    node.parent.kind === 180 &&
+                    node.parent.body === node &&
+                    languageVersion <= 1) {
+                    return false;
+                }
+                return true;
+            }
+            function emitJavaScriptWorker(node) {
+                switch (node.kind) {
+                    case 69:
+                        return emitIdentifier(node);
+                    case 142:
+                        return emitParameter(node);
+                    case 147:
+                    case 146:
+                        return emitMethod(node);
+                    case 149:
+                    case 150:
+                        return emitAccessor(node);
+                    case 97:
+                        return emitThis(node);
+                    case 95:
+                        return emitSuper(node);
+                    case 93:
+                        return write("null");
+                    case 99:
+                        return write("true");
+                    case 84:
+                        return write("false");
+                    case 8:
+                    case 9:
+                    case 10:
+                    case 11:
+                    case 12:
+                    case 13:
+                    case 14:
+                        return emitLiteral(node);
+                    case 189:
+                        return emitTemplateExpression(node);
+                    case 197:
+                        return emitTemplateSpan(node);
+                    case 241:
+                    case 242:
+                        return emitJsxElement(node);
+                    case 244:
+                        return emitJsxText(node);
+                    case 248:
+                        return emitJsxExpression(node);
+                    case 139:
+                        return emitQualifiedName(node);
+                    case 167:
+                        return emitObjectBindingPattern(node);
+                    case 168:
+                        return emitArrayBindingPattern(node);
+                    case 169:
+                        return emitBindingElement(node);
+                    case 170:
+                        return emitArrayLiteral(node);
+                    case 171:
+                        return emitObjectLiteral(node);
+                    case 253:
+                        return emitPropertyAssignment(node);
+                    case 254:
+                        return emitShorthandPropertyAssignment(node);
+                    case 140:
+                        return emitComputedPropertyName(node);
+                    case 172:
+                        return emitPropertyAccess(node);
+                    case 173:
+                        return emitIndexedAccess(node);
+                    case 174:
+                        return emitCallExpression(node);
+                    case 175:
+                        return emitNewExpression(node);
+                    case 176:
+                        return emitTaggedTemplateExpression(node);
+                    case 177:
+                    case 195:
+                    case 196:
+                        return emit(node.expression);
+                    case 178:
+                        return emitParenExpression(node);
+                    case 220:
+                    case 179:
+                    case 180:
+                        return emitFunctionDeclaration(node);
+                    case 181:
+                        return emitDeleteExpression(node);
+                    case 182:
+                        return emitTypeOfExpression(node);
+                    case 183:
+                        return emitVoidExpression(node);
+                    case 184:
+                        return emitAwaitExpression(node);
+                    case 185:
+                        return emitPrefixUnaryExpression(node);
+                    case 186:
+                        return emitPostfixUnaryExpression(node);
+                    case 187:
+                        return emitBinaryExpression(node);
+                    case 188:
+                        return emitConditionalExpression(node);
+                    case 191:
+                        return emitSpreadElementExpression(node);
+                    case 190:
+                        return emitYieldExpression(node);
+                    case 193:
+                        return;
+                    case 199:
+                    case 226:
+                        return emitBlock(node);
+                    case 200:
+                        return emitVariableStatement(node);
+                    case 201:
+                        return write(";");
+                    case 202:
+                        return emitExpressionStatement(node);
+                    case 203:
+                        return emitIfStatement(node);
+                    case 204:
+                        return emitDoStatement(node);
+                    case 205:
+                        return emitWhileStatement(node);
+                    case 206:
+                        return emitForStatement(node);
+                    case 208:
+                    case 207:
+                        return emitForInOrForOfStatement(node);
+                    case 209:
+                    case 210:
+                        return emitBreakOrContinueStatement(node);
+                    case 211:
+                        return emitReturnStatement(node);
+                    case 212:
+                        return emitWithStatement(node);
+                    case 213:
+                        return emitSwitchStatement(node);
+                    case 249:
+                    case 250:
+                        return emitCaseOrDefaultClause(node);
+                    case 214:
+                        return emitLabeledStatement(node);
+                    case 215:
+                        return emitThrowStatement(node);
+                    case 216:
+                        return emitTryStatement(node);
+                    case 252:
+                        return emitCatchClause(node);
+                    case 217:
+                        return emitDebuggerStatement(node);
+                    case 218:
+                        return emitVariableDeclaration(node);
+                    case 192:
+                        return emitClassExpression(node);
+                    case 221:
+                        return emitClassDeclaration(node);
+                    case 222:
+                        return emitInterfaceDeclaration(node);
+                    case 224:
+                        return emitEnumDeclaration(node);
+                    case 255:
+                        return emitEnumMember(node);
+                    case 225:
+                        return emitModuleDeclaration(node);
+                    case 230:
+                        return emitImportDeclaration(node);
+                    case 229:
+                        return emitImportEqualsDeclaration(node);
+                    case 236:
+                        return emitExportDeclaration(node);
+                    case 235:
+                        return emitExportAssignment(node);
+                    case 256:
+                        return emitSourceFileNode(node);
+                }
+            }
+            function hasDetachedComments(pos) {
+                return detachedCommentsInfo !== undefined && ts.lastOrUndefined(detachedCommentsInfo).nodePos === pos;
+            }
+            function getLeadingCommentsWithoutDetachedComments() {
+                var leadingComments = ts.getLeadingCommentRanges(currentText, ts.lastOrUndefined(detachedCommentsInfo).detachedCommentEndPos);
+                if (detachedCommentsInfo.length - 1) {
+                    detachedCommentsInfo.pop();
+                }
+                else {
+                    detachedCommentsInfo = undefined;
+                }
+                return leadingComments;
+            }
+            function isTripleSlashComment(comment) {
+                if (currentText.charCodeAt(comment.pos + 1) === 47 &&
+                    comment.pos + 2 < comment.end &&
+                    currentText.charCodeAt(comment.pos + 2) === 47) {
+                    var textSubStr = currentText.substring(comment.pos, comment.end);
+                    return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) ||
+                        textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ?
+                        true : false;
+                }
+                return false;
+            }
+            function getLeadingCommentsToEmit(node) {
+                if (node.parent) {
+                    if (node.parent.kind === 256 || node.pos !== node.parent.pos) {
+                        if (hasDetachedComments(node.pos)) {
+                            return getLeadingCommentsWithoutDetachedComments();
+                        }
+                        else {
+                            return ts.getLeadingCommentRangesOfNodeFromText(node, currentText);
+                        }
+                    }
+                }
+            }
+            function getTrailingCommentsToEmit(node) {
+                if (node.parent) {
+                    if (node.parent.kind === 256 || node.end !== node.parent.end) {
+                        return ts.getTrailingCommentRanges(currentText, node.end);
+                    }
+                }
+            }
+            function emitCommentsOnNotEmittedNode(node) {
+                emitLeadingCommentsWorker(node, false);
+            }
+            function emitLeadingComments(node) {
+                return emitLeadingCommentsWorker(node, true);
+            }
+            function emitLeadingCommentsWorker(node, isEmittedNode) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var leadingComments;
+                if (isEmittedNode) {
+                    leadingComments = getLeadingCommentsToEmit(node);
+                }
+                else {
+                    if (node.pos === 0) {
+                        leadingComments = ts.filter(getLeadingCommentsToEmit(node), isTripleSlashComment);
+                    }
+                }
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, node, leadingComments);
+                ts.emitComments(currentText, currentLineMap, writer, leadingComments, true, newLine, writeComment);
+            }
+            function emitTrailingComments(node) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var trailingComments = getTrailingCommentsToEmit(node);
+                ts.emitComments(currentText, currentLineMap, writer, trailingComments, false, newLine, writeComment);
+            }
+            function emitTrailingCommentsOfPosition(pos) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var trailingComments = ts.getTrailingCommentRanges(currentText, pos);
+                ts.emitComments(currentText, currentLineMap, writer, trailingComments, true, newLine, writeComment);
+            }
+            function emitLeadingCommentsOfPositionWorker(pos) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var leadingComments;
+                if (hasDetachedComments(pos)) {
+                    leadingComments = getLeadingCommentsWithoutDetachedComments();
+                }
+                else {
+                    leadingComments = ts.getLeadingCommentRanges(currentText, pos);
+                }
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, { pos: pos, end: pos }, leadingComments);
+                ts.emitComments(currentText, currentLineMap, writer, leadingComments, true, newLine, writeComment);
+            }
+            function emitDetachedCommentsAndUpdateCommentsInfo(node) {
+                var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, node, newLine, compilerOptions.removeComments);
+                if (currentDetachedCommentInfo) {
+                    if (detachedCommentsInfo) {
+                        detachedCommentsInfo.push(currentDetachedCommentInfo);
+                    }
+                    else {
+                        detachedCommentsInfo = [currentDetachedCommentInfo];
+                    }
+                }
+            }
+            function writeComment(text, lineMap, writer, comment, newLine) {
+                emitPos(comment.pos);
+                ts.writeCommentRange(text, lineMap, writer, comment, newLine);
+                emitPos(comment.end);
+            }
+            function emitShebang() {
+                var shebang = ts.getShebang(currentText);
+                if (shebang) {
+                    write(shebang);
+                    writeLine();
+                }
+            }
+            var _a, _b;
+        }
+        function emitFile(_a, sourceFiles, isBundledEmit) {
+            var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath;
+            if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
+                emitJavaScript(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
+            }
+            else {
+                emitSkipped = true;
+            }
+            if (declarationFilePath) {
+                emitSkipped = ts.writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) || emitSkipped;
+            }
+            if (!emitSkipped && emittedFilesList) {
+                emittedFilesList.push(jsFilePath);
+                if (sourceMapFilePath) {
+                    emittedFilesList.push(sourceMapFilePath);
+                }
+                if (declarationFilePath) {
+                    emittedFilesList.push(declarationFilePath);
+                }
+            }
+        }
+    }
+    ts.emitFiles = emitFiles;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.programTime = 0;
+    ts.emitTime = 0;
+    ts.ioReadTime = 0;
+    ts.ioWriteTime = 0;
+    var emptyArray = [];
+    var defaultLibrarySearchPaths = [
+        "types/",
+        "node_modules/",
+        "node_modules/@types/",
+    ];
+    ts.version = "1.9.0";
+    function findConfigFile(searchPath, fileExists) {
+        while (true) {
+            var fileName = ts.combinePaths(searchPath, "tsconfig.json");
+            if (fileExists(fileName)) {
+                return fileName;
+            }
+            var parentPath = ts.getDirectoryPath(searchPath);
+            if (parentPath === searchPath) {
+                break;
+            }
+            searchPath = parentPath;
+        }
+        return undefined;
+    }
+    ts.findConfigFile = findConfigFile;
+    function resolveTripleslashReference(moduleName, containingFile) {
+        var basePath = ts.getDirectoryPath(containingFile);
+        var referencedFileName = ts.isRootedDiskPath(moduleName) ? moduleName : ts.combinePaths(basePath, moduleName);
+        return ts.normalizePath(referencedFileName);
+    }
+    ts.resolveTripleslashReference = resolveTripleslashReference;
+    function computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName) {
+        var commonPathComponents;
+        var failed = ts.forEach(fileNames, function (sourceFile) {
+            var sourcePathComponents = ts.getNormalizedPathComponents(sourceFile, currentDirectory);
+            sourcePathComponents.pop();
+            if (!commonPathComponents) {
+                commonPathComponents = sourcePathComponents;
+                return;
+            }
+            for (var i = 0, n = Math.min(commonPathComponents.length, sourcePathComponents.length); i < n; i++) {
+                if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
+                    if (i === 0) {
+                        return true;
+                    }
+                    commonPathComponents.length = i;
+                    break;
+                }
+            }
+            if (sourcePathComponents.length < commonPathComponents.length) {
+                commonPathComponents.length = sourcePathComponents.length;
+            }
+        });
+        if (failed) {
+            return "";
+        }
+        if (!commonPathComponents) {
+            return currentDirectory;
+        }
+        return ts.getNormalizedPathFromPathComponents(commonPathComponents);
+    }
+    ts.computeCommonSourceDirectoryOfFilenames = computeCommonSourceDirectoryOfFilenames;
+    function trace(host, message) {
+        host.trace(ts.formatMessage.apply(undefined, arguments));
+    }
+    function isTraceEnabled(compilerOptions, host) {
+        return compilerOptions.traceResolution && host.trace !== undefined;
+    }
+    function hasZeroOrOneAsteriskCharacter(str) {
+        var seenAsterisk = false;
+        for (var i = 0; i < str.length; i++) {
+            if (str.charCodeAt(i) === 42) {
+                if (!seenAsterisk) {
+                    seenAsterisk = true;
+                }
+                else {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+    ts.hasZeroOrOneAsteriskCharacter = hasZeroOrOneAsteriskCharacter;
+    function createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations) {
+        return { resolvedModule: resolvedFileName ? { resolvedFileName: resolvedFileName, isExternalLibraryImport: isExternalLibraryImport } : undefined, failedLookupLocations: failedLookupLocations };
+    }
+    function moduleHasNonRelativeName(moduleName) {
+        if (ts.isRootedDiskPath(moduleName)) {
+            return false;
+        }
+        var i = moduleName.lastIndexOf("./", 1);
+        var startsWithDotSlashOrDotDotSlash = i === 0 || (i === 1 && moduleName.charCodeAt(0) === 46);
+        return !startsWithDotSlashOrDotDotSlash;
+    }
+    function tryReadTypesSection(packageJsonPath, baseDirectory, state) {
+        var jsonContent;
+        try {
+            var jsonText = state.host.readFile(packageJsonPath);
+            jsonContent = jsonText ? JSON.parse(jsonText) : {};
+        }
+        catch (e) {
+            jsonContent = {};
+        }
+        var typesFile;
+        var fieldName;
+        if (jsonContent.typings) {
+            if (typeof jsonContent.typings === "string") {
+                fieldName = "typings";
+                typesFile = jsonContent.typings;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "typings", typeof jsonContent.typings);
+                }
+            }
+        }
+        if (!typesFile && jsonContent.types) {
+            if (typeof jsonContent.types === "string") {
+                fieldName = "types";
+                typesFile = jsonContent.types;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "types", typeof jsonContent.types);
+                }
+            }
+        }
+        if (typesFile) {
+            var typesFilePath = ts.normalizePath(ts.combinePaths(baseDirectory, typesFile));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, typesFile, typesFilePath);
+            }
+            return typesFilePath;
+        }
+        return undefined;
+    }
+    var typeReferenceExtensions = [".d.ts"];
+    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
+        var traceEnabled = isTraceEnabled(options, host);
+        var moduleResolutionState = {
+            compilerOptions: options,
+            host: host,
+            skipTsx: true,
+            traceEnabled: traceEnabled
+        };
+        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
+        if (traceEnabled) {
+            if (containingFile === undefined) {
+                if (rootDir === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, rootDir);
+                }
+            }
+            else {
+                if (rootDir === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, rootDir);
+                }
+            }
+        }
+        var failedLookupLocations = [];
+        if (rootDir !== undefined) {
+            var effectivePrimarySearchPaths = options.typesSearchPaths || defaultLibrarySearchPaths;
+            for (var _i = 0, effectivePrimarySearchPaths_1 = effectivePrimarySearchPaths; _i < effectivePrimarySearchPaths_1.length; _i++) {
+                var searchPath = effectivePrimarySearchPaths_1[_i];
+                var primaryPath = ts.combinePaths(rootDir, searchPath);
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, primaryPath);
+                }
+                var candidate = ts.combinePaths(primaryPath, typeReferenceDirectiveName);
+                var candidateDirectory = ts.getDirectoryPath(candidate);
+                var resolvedFile_1 = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations, !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
+                if (resolvedFile_1) {
+                    if (traceEnabled) {
+                        trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile_1, true);
+                    }
+                    return {
+                        resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile_1 },
+                        failedLookupLocations: failedLookupLocations
+                    };
+                }
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
+            }
+        }
+        var resolvedFile;
+        var initialLocationForSecondaryLookup;
+        if (containingFile) {
+            initialLocationForSecondaryLookup = ts.getDirectoryPath(containingFile);
+        }
+        else {
+            initialLocationForSecondaryLookup = rootDir;
+        }
+        if (initialLocationForSecondaryLookup !== undefined) {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
+            }
+            resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState);
+            if (traceEnabled) {
+                if (resolvedFile) {
+                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
+                }
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
+            }
+        }
+        return {
+            resolvedTypeReferenceDirective: resolvedFile
+                ? { primary: false, resolvedFileName: resolvedFile }
+                : undefined,
+            failedLookupLocations: failedLookupLocations
+        };
+    }
+    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
+    function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        if (traceEnabled) {
+            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
+        }
+        var moduleResolution = compilerOptions.moduleResolution;
+        if (moduleResolution === undefined) {
+            moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
+            }
+        }
+        var result;
+        switch (moduleResolution) {
+            case ts.ModuleResolutionKind.NodeJs:
+                result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
+                break;
+            case ts.ModuleResolutionKind.Classic:
+                result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
+                break;
+        }
+        if (traceEnabled) {
+            if (result.resolvedModule) {
+                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
+            }
+            else {
+                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
+            }
+        }
+        return result;
+    }
+    ts.resolveModuleName = resolveModuleName;
+    function tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
+        if (moduleHasNonRelativeName(moduleName)) {
+            return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
+        }
+        else {
+            return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
+        }
+    }
+    function tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
+        if (!state.compilerOptions.rootDirs) {
+            return undefined;
+        }
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
+        }
+        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+        var matchedRootDir;
+        var matchedNormalizedPrefix;
+        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
+            var rootDir = _a[_i];
+            var normalizedRoot = ts.normalizePath(rootDir);
+            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
+                normalizedRoot += ts.directorySeparator;
+            }
+            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
+                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
+            }
+            if (isLongestMatchingPrefix) {
+                matchedNormalizedPrefix = normalizedRoot;
+                matchedRootDir = rootDir;
+            }
+        }
+        if (matchedNormalizedPrefix) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
+            }
+            var suffix = candidate.substr(matchedNormalizedPrefix.length);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
+            }
+            var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
+            if (resolvedFileName) {
+                return resolvedFileName;
+            }
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
+            }
+            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
+                var rootDir = _c[_b];
+                if (rootDir === matchedRootDir) {
+                    continue;
+                }
+                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
+                }
+                var baseDirectory = ts.getDirectoryPath(candidate_1);
+                var resolvedFileName_1 = loader(candidate_1, supportedExtensions, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
+                if (resolvedFileName_1) {
+                    return resolvedFileName_1;
+                }
+            }
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
+            }
+        }
+        return undefined;
+    }
+    function tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state) {
+        if (!state.compilerOptions.baseUrl) {
+            return undefined;
+        }
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
+        }
+        var matchedPattern = undefined;
+        if (state.compilerOptions.paths) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
+            }
+            matchedPattern = matchPatternOrExact(ts.getKeys(state.compilerOptions.paths), moduleName);
+        }
+        if (matchedPattern) {
+            var matchedStar = typeof matchedPattern === "string" ? undefined : matchedText(matchedPattern, moduleName);
+            var matchedPatternText = typeof matchedPattern === "string" ? matchedPattern : patternText(matchedPattern);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPatternText);
+            }
+            for (var _i = 0, _a = state.compilerOptions.paths[matchedPatternText]; _i < _a.length; _i++) {
+                var subst = _a[_i];
+                var path = matchedStar ? subst.replace("*", matchedStar) : subst;
+                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
+                }
+                var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+                if (resolvedFileName) {
+                    return resolvedFileName;
+                }
+            }
+            return undefined;
+        }
+        else {
+            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
+            }
+            return loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+        }
+    }
+    function matchPatternOrExact(patternStrings, candidate) {
+        var patterns = [];
+        for (var _i = 0, patternStrings_1 = patternStrings; _i < patternStrings_1.length; _i++) {
+            var patternString = patternStrings_1[_i];
+            var pattern = tryParsePattern(patternString);
+            if (pattern) {
+                patterns.push(pattern);
+            }
+            else if (patternString === candidate) {
+                return patternString;
+            }
+        }
+        return findBestPatternMatch(patterns, function (_) { return _; }, candidate);
+    }
+    function patternText(_a) {
+        var prefix = _a.prefix, suffix = _a.suffix;
+        return prefix + "*" + suffix;
+    }
+    function matchedText(pattern, candidate) {
+        ts.Debug.assert(isPatternMatch(pattern, candidate));
+        return candidate.substr(pattern.prefix.length, candidate.length - pattern.suffix.length);
+    }
+    function findBestPatternMatch(values, getPattern, candidate) {
+        var matchedValue = undefined;
+        var longestMatchPrefixLength = -1;
+        for (var _i = 0, values_1 = values; _i < values_1.length; _i++) {
+            var v = values_1[_i];
+            var pattern = getPattern(v);
+            if (isPatternMatch(pattern, candidate) && pattern.prefix.length > longestMatchPrefixLength) {
+                longestMatchPrefixLength = pattern.prefix.length;
+                matchedValue = v;
+            }
+        }
+        return matchedValue;
+    }
+    ts.findBestPatternMatch = findBestPatternMatch;
+    function isPatternMatch(_a, candidate) {
+        var prefix = _a.prefix, suffix = _a.suffix;
+        return candidate.length >= prefix.length + suffix.length &&
+            ts.startsWith(candidate, prefix) &&
+            ts.endsWith(candidate, suffix);
+    }
+    function tryParsePattern(pattern) {
+        ts.Debug.assert(hasZeroOrOneAsteriskCharacter(pattern));
+        var indexOfStar = pattern.indexOf("*");
+        return indexOfStar === -1 ? undefined : {
+            prefix: pattern.substr(0, indexOfStar),
+            suffix: pattern.substr(indexOfStar + 1)
+        };
+    }
+    ts.tryParsePattern = tryParsePattern;
+    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host) {
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var failedLookupLocations = [];
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: false };
+        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName, failedLookupLocations, supportedExtensions, state);
+        var isExternalLibraryImport = false;
+        if (!resolvedFileName) {
+            if (moduleHasNonRelativeName(moduleName)) {
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
+                }
+                resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state);
+                isExternalLibraryImport = resolvedFileName !== undefined;
+            }
+            else {
+                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, false, state);
+            }
+        }
+        if (resolvedFileName && host.realpath) {
+            var originalFileName = resolvedFileName;
+            resolvedFileName = ts.normalizePath(host.realpath(resolvedFileName));
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
+            }
+        }
+        return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
+    }
+    ts.nodeModuleNameResolver = nodeModuleNameResolver;
+    function nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state) {
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
+        }
+        var resolvedFileName = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
+        return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
+    }
+    function directoryProbablyExists(directoryName, host) {
+        return !host.directoryExists || host.directoryExists(directoryName);
+    }
+    ts.directoryProbablyExists = directoryProbablyExists;
+    function loadModuleFromFile(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
+        var resolvedByAddingOrKeepingExtension = loadModuleFromFileWorker(candidate, extensions, failedLookupLocation, onlyRecordFailures, state);
+        if (resolvedByAddingOrKeepingExtension) {
+            return resolvedByAddingOrKeepingExtension;
+        }
+        if (ts.hasJavaScriptFileExtension(candidate)) {
+            var extensionless = ts.removeFileExtension(candidate);
+            if (state.traceEnabled) {
+                var extension = candidate.substring(extensionless.length);
+                trace(state.host, ts.Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
+            }
+            return loadModuleFromFileWorker(extensionless, extensions, failedLookupLocation, onlyRecordFailures, state);
+        }
+    }
+    function loadModuleFromFileWorker(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
+        if (!onlyRecordFailures) {
+            var directory = ts.getDirectoryPath(candidate);
+            if (directory) {
+                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
+            }
+        }
+        return ts.forEach(extensions, tryLoad);
+        function tryLoad(ext) {
+            if (state.skipTsx && ts.isJsxOrTsxExtension(ext)) {
+                return undefined;
+            }
+            var fileName = ts.fileExtensionIs(candidate, ext) ? candidate : candidate + ext;
+            if (!onlyRecordFailures && state.host.fileExists(fileName)) {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
+                }
+                return fileName;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
+                }
+                failedLookupLocation.push(fileName);
+                return undefined;
+            }
+        }
+    }
+    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocation, onlyRecordFailures, state) {
+        var packageJsonPath = ts.combinePaths(candidate, "package.json");
+        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
+        if (directoryExists && state.host.fileExists(packageJsonPath)) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
+            }
+            var typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
+            if (typesFile) {
+                var result = loadModuleFromFile(typesFile, extensions, failedLookupLocation, !directoryProbablyExists(ts.getDirectoryPath(typesFile), state.host), state);
+                if (result) {
+                    return result;
+                }
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.package_json_does_not_have_types_field);
+                }
+            }
+        }
+        else {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
+            }
+            failedLookupLocation.push(packageJsonPath);
+        }
+        return loadModuleFromFile(ts.combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
+    }
+    function loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) {
+        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
+        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
+        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
+        var result = loadModuleFromFile(candidate, ts.supportedTypeScriptExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
+        if (result) {
+            return result;
+        }
+        result = loadNodeModuleFromDirectory(ts.supportedTypeScriptExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
+        if (result) {
+            return result;
+        }
+    }
+    function loadModuleFromNodeModules(moduleName, directory, failedLookupLocations, state) {
+        directory = ts.normalizeSlashes(directory);
+        while (true) {
+            var baseName = ts.getBaseFileName(directory);
+            if (baseName !== "node_modules") {
+                var result = loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) ||
+                    loadModuleFromNodeModulesFolder(ts.combinePaths("@types", moduleName), directory, failedLookupLocations, state);
+                if (result) {
+                    return result;
+                }
+            }
+            var parentPath = ts.getDirectoryPath(directory);
+            if (parentPath === directory) {
+                break;
+            }
+            directory = parentPath;
+        }
+        return undefined;
+    }
+    function classicNameResolver(moduleName, containingFile, compilerOptions, host) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: !compilerOptions.jsx };
+        var failedLookupLocations = [];
+        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
+        if (resolvedFileName) {
+            return createResolvedModule(resolvedFileName, false, failedLookupLocations);
+        }
+        var referencedSourceFile;
+        if (moduleHasNonRelativeName(moduleName)) {
+            while (true) {
+                var searchName = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, false, state);
+                if (referencedSourceFile) {
+                    break;
+                }
+                var parentPath = ts.getDirectoryPath(containingDirectory);
+                if (parentPath === containingDirectory) {
+                    break;
+                }
+                containingDirectory = parentPath;
+            }
+        }
+        else {
+            var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+            referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, false, state);
+        }
+        return referencedSourceFile
+            ? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations: failedLookupLocations }
+            : { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
+    }
+    ts.classicNameResolver = classicNameResolver;
+    ts.defaultInitCompilerOptions = {
+        module: ts.ModuleKind.CommonJS,
+        target: 1,
+        noImplicitAny: false,
+        sourceMap: false
+    };
+    function createCompilerHost(options, setParentNodes) {
+        var existingDirectories = {};
+        function getCanonicalFileName(fileName) {
+            return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
+        }
+        var unsupportedFileEncodingErrorCode = -2147024809;
+        function getSourceFile(fileName, languageVersion, onError) {
+            var text;
+            try {
+                var start = new Date().getTime();
+                text = ts.sys.readFile(fileName, options.charset);
+                ts.ioReadTime += new Date().getTime() - start;
+            }
+            catch (e) {
+                if (onError) {
+                    onError(e.number === unsupportedFileEncodingErrorCode
+                        ? ts.createCompilerDiagnostic(ts.Diagnostics.Unsupported_file_encoding).messageText
+                        : e.message);
+                }
+                text = "";
+            }
+            return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
+        }
+        function directoryExists(directoryPath) {
+            if (ts.hasProperty(existingDirectories, directoryPath)) {
+                return true;
+            }
+            if (ts.sys.directoryExists(directoryPath)) {
+                existingDirectories[directoryPath] = true;
+                return true;
+            }
+            return false;
+        }
+        function ensureDirectoriesExist(directoryPath) {
+            if (directoryPath.length > ts.getRootLength(directoryPath) && !directoryExists(directoryPath)) {
+                var parentDirectory = ts.getDirectoryPath(directoryPath);
+                ensureDirectoriesExist(parentDirectory);
+                ts.sys.createDirectory(directoryPath);
+            }
+        }
+        var outputFingerprints;
+        function writeFileIfUpdated(fileName, data, writeByteOrderMark) {
+            if (!outputFingerprints) {
+                outputFingerprints = {};
+            }
+            var hash = ts.sys.createHash(data);
+            var mtimeBefore = ts.sys.getModifiedTime(fileName);
+            if (mtimeBefore && ts.hasProperty(outputFingerprints, fileName)) {
+                var fingerprint = outputFingerprints[fileName];
+                if (fingerprint.byteOrderMark === writeByteOrderMark &&
+                    fingerprint.hash === hash &&
+                    fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
+                    return;
+                }
+            }
+            ts.sys.writeFile(fileName, data, writeByteOrderMark);
+            var mtimeAfter = ts.sys.getModifiedTime(fileName);
+            outputFingerprints[fileName] = {
+                hash: hash,
+                byteOrderMark: writeByteOrderMark,
+                mtime: mtimeAfter
+            };
+        }
+        function writeFile(fileName, data, writeByteOrderMark, onError) {
+            try {
+                var start = new Date().getTime();
+                ensureDirectoriesExist(ts.getDirectoryPath(ts.normalizePath(fileName)));
+                if (ts.isWatchSet(options) && ts.sys.createHash && ts.sys.getModifiedTime) {
+                    writeFileIfUpdated(fileName, data, writeByteOrderMark);
+                }
+                else {
+                    ts.sys.writeFile(fileName, data, writeByteOrderMark);
+                }
+                ts.ioWriteTime += new Date().getTime() - start;
+            }
+            catch (e) {
+                if (onError) {
+                    onError(e.message);
+                }
+            }
+        }
+        function getDefaultTypeDirectiveNames(rootPath) {
+            var localTypes = ts.combinePaths(rootPath, "types");
+            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
+            var result = [];
+            if (ts.sys.directoryExists(localTypes)) {
+                result = result.concat(ts.sys.getDirectories(localTypes));
+            }
+            if (ts.sys.directoryExists(npmTypes)) {
+                result = result.concat(ts.sys.getDirectories(npmTypes));
+            }
+            return result;
+        }
+        function getDefaultLibLocation() {
+            return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
+        }
+        var newLine = ts.getNewLineCharacter(options);
+        var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
+        return {
+            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
+            getSourceFile: getSourceFile,
+            getDefaultLibLocation: getDefaultLibLocation,
+            getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
+            writeFile: writeFile,
+            getCurrentDirectory: ts.memoize(function () { return ts.sys.getCurrentDirectory(); }),
+            useCaseSensitiveFileNames: function () { return ts.sys.useCaseSensitiveFileNames; },
+            getCanonicalFileName: getCanonicalFileName,
+            getNewLine: function () { return newLine; },
+            fileExists: function (fileName) { return ts.sys.fileExists(fileName); },
+            readFile: function (fileName) { return ts.sys.readFile(fileName); },
+            trace: function (s) { return ts.sys.write(s + newLine); },
+            directoryExists: function (directoryName) { return ts.sys.directoryExists(directoryName); },
+            realpath: realpath
+        };
+    }
+    ts.createCompilerHost = createCompilerHost;
+    function getPreEmitDiagnostics(program, sourceFile, cancellationToken) {
+        var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
+        if (program.getCompilerOptions().declaration) {
+            diagnostics = diagnostics.concat(program.getDeclarationDiagnostics(sourceFile, cancellationToken));
+        }
+        return ts.sortAndDeduplicateDiagnostics(diagnostics);
+    }
+    ts.getPreEmitDiagnostics = getPreEmitDiagnostics;
+    function flattenDiagnosticMessageText(messageText, newLine) {
+        if (typeof messageText === "string") {
+            return messageText;
+        }
+        else {
+            var diagnosticChain = messageText;
+            var result = "";
+            var indent = 0;
+            while (diagnosticChain) {
+                if (indent) {
+                    result += newLine;
+                    for (var i = 0; i < indent; i++) {
+                        result += "  ";
+                    }
+                }
+                result += diagnosticChain.messageText;
+                indent++;
+                diagnosticChain = diagnosticChain.next;
+            }
+            return result;
+        }
+    }
+    ts.flattenDiagnosticMessageText = flattenDiagnosticMessageText;
+    function loadWithLocalCache(names, containingFile, loader) {
+        if (names.length === 0) {
+            return [];
+        }
+        var resolutions = [];
+        var cache = {};
+        for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
+            var name_34 = names_1[_i];
+            var result = void 0;
+            if (ts.hasProperty(cache, name_34)) {
+                result = cache[name_34];
+            }
+            else {
+                result = loader(name_34, containingFile);
+                cache[name_34] = result;
+            }
+            resolutions.push(result);
+        }
+        return resolutions;
+    }
+    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
+        if (options.types) {
+            return options.types;
+        }
+        if (host && host.getDefaultTypeDirectiveNames) {
+            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
+            if (commonRoot) {
+                return host.getDefaultTypeDirectiveNames(commonRoot);
+            }
+        }
+        return undefined;
+    }
+    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
+    function createProgram(rootNames, options, host, oldProgram) {
+        var program;
+        var files = [];
+        var commonSourceDirectory;
+        var diagnosticsProducingTypeChecker;
+        var noDiagnosticsTypeChecker;
+        var classifiableNames;
+        var resolvedTypeReferenceDirectives = {};
+        var fileProcessingDiagnostics = ts.createDiagnosticCollection();
+        var start = new Date().getTime();
+        host = host || createCompilerHost(options);
+        var skipDefaultLib = options.noLib;
+        var programDiagnostics = ts.createDiagnosticCollection();
+        var currentDirectory = host.getCurrentDirectory();
+        var supportedExtensions = ts.getSupportedExtensions(options);
+        var hasEmitBlockingDiagnostics = ts.createFileMap(getCanonicalFileName);
+        var resolveModuleNamesWorker;
+        if (host.resolveModuleNames) {
+            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
+        }
+        else {
+            var loader_1 = function (moduleName, containingFile) { return resolveModuleName(moduleName, containingFile, options, host).resolvedModule; };
+            resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(moduleNames, containingFile, loader_1); };
+        }
+        var resolveTypeReferenceDirectiveNamesWorker;
+        if (host.resolveTypeReferenceDirectives) {
+            resolveTypeReferenceDirectiveNamesWorker = function (typeDirectiveNames, containingFile) { return host.resolveTypeReferenceDirectives(typeDirectiveNames, containingFile); };
+        }
+        else {
+            var loader_2 = function (typesRef, containingFile) { return resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective; };
+            resolveTypeReferenceDirectiveNamesWorker = function (typeReferenceDirectiveNames, containingFile) { return loadWithLocalCache(typeReferenceDirectiveNames, containingFile, loader_2); };
+        }
+        var filesByName = ts.createFileMap();
+        var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
+        if (!tryReuseStructureFromOldProgram()) {
+            ts.forEach(rootNames, function (name) { return processRootFile(name, false); });
+            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
+            if (typeReferences) {
+                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, undefined);
+                for (var i = 0; i < typeReferences.length; i++) {
+                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
+                }
+            }
+            if (!skipDefaultLib) {
+                if (!options.lib) {
+                    processRootFile(host.getDefaultLibFileName(options), true);
+                }
+                else {
+                    var libDirectory_1 = host.getDefaultLibLocation ? host.getDefaultLibLocation() : ts.getDirectoryPath(host.getDefaultLibFileName(options));
+                    ts.forEach(options.lib, function (libFileName) {
+                        processRootFile(ts.combinePaths(libDirectory_1, libFileName), true);
+                    });
+                }
+            }
+        }
+        oldProgram = undefined;
+        program = {
+            getRootFileNames: function () { return rootNames; },
+            getSourceFile: getSourceFile,
+            getSourceFileByPath: getSourceFileByPath,
+            getSourceFiles: function () { return files; },
+            getCompilerOptions: function () { return options; },
+            getSyntacticDiagnostics: getSyntacticDiagnostics,
+            getOptionsDiagnostics: getOptionsDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getSemanticDiagnostics: getSemanticDiagnostics,
+            getDeclarationDiagnostics: getDeclarationDiagnostics,
+            getTypeChecker: getTypeChecker,
+            getClassifiableNames: getClassifiableNames,
+            getDiagnosticsProducingTypeChecker: getDiagnosticsProducingTypeChecker,
+            getCommonSourceDirectory: getCommonSourceDirectory,
+            emit: emit,
+            getCurrentDirectory: function () { return currentDirectory; },
+            getNodeCount: function () { return getDiagnosticsProducingTypeChecker().getNodeCount(); },
+            getIdentifierCount: function () { return getDiagnosticsProducingTypeChecker().getIdentifierCount(); },
+            getSymbolCount: function () { return getDiagnosticsProducingTypeChecker().getSymbolCount(); },
+            getTypeCount: function () { return getDiagnosticsProducingTypeChecker().getTypeCount(); },
+            getFileProcessingDiagnostics: function () { return fileProcessingDiagnostics; },
+            getResolvedTypeReferenceDirectives: function () { return resolvedTypeReferenceDirectives; }
+        };
+        verifyCompilerOptions();
+        ts.programTime += new Date().getTime() - start;
+        return program;
+        function getCommonSourceDirectory() {
+            if (typeof commonSourceDirectory === "undefined") {
+                if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
+                    commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
+                }
+                else {
+                    commonSourceDirectory = computeCommonSourceDirectory(files);
+                }
+                if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
+                    commonSourceDirectory += ts.directorySeparator;
+                }
+            }
+            return commonSourceDirectory;
+        }
+        function getClassifiableNames() {
+            if (!classifiableNames) {
+                getTypeChecker();
+                classifiableNames = {};
+                for (var _i = 0, files_3 = files; _i < files_3.length; _i++) {
+                    var sourceFile = files_3[_i];
+                    ts.copyMap(sourceFile.classifiableNames, classifiableNames);
+                }
+            }
+            return classifiableNames;
+        }
+        function tryReuseStructureFromOldProgram() {
+            if (!oldProgram) {
+                return false;
+            }
+            var oldOptions = oldProgram.getCompilerOptions();
+            if ((oldOptions.module !== options.module) ||
+                (oldOptions.moduleResolution !== options.moduleResolution) ||
+                (oldOptions.noResolve !== options.noResolve) ||
+                (oldOptions.target !== options.target) ||
+                (oldOptions.noLib !== options.noLib) ||
+                (oldOptions.jsx !== options.jsx) ||
+                (oldOptions.allowJs !== options.allowJs) ||
+                (oldOptions.rootDir !== options.rootDir) ||
+                (oldOptions.typesSearchPaths !== options.typesSearchPaths) ||
+                (oldOptions.configFilePath !== options.configFilePath) ||
+                (oldOptions.baseUrl !== options.baseUrl) ||
+                (oldOptions.typesRoot !== options.typesRoot) ||
+                !ts.arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
+                !ts.mapIsEqualTo(oldOptions.paths, options.paths)) {
+                return false;
+            }
+            ts.Debug.assert(!oldProgram.structureIsReused);
+            var oldRootNames = oldProgram.getRootFileNames();
+            if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
+                return false;
+            }
+            if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
+                return false;
+            }
+            var newSourceFiles = [];
+            var filePaths = [];
+            var modifiedSourceFiles = [];
+            for (var _i = 0, _a = oldProgram.getSourceFiles(); _i < _a.length; _i++) {
+                var oldSourceFile = _a[_i];
+                var newSourceFile = host.getSourceFileByPath
+                    ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target)
+                    : host.getSourceFile(oldSourceFile.fileName, options.target);
+                if (!newSourceFile) {
+                    return false;
+                }
+                newSourceFile.path = oldSourceFile.path;
+                filePaths.push(newSourceFile.path);
+                if (oldSourceFile !== newSourceFile) {
+                    if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
+                        return false;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
+                        return false;
+                    }
+                    collectExternalModuleReferences(newSourceFile);
+                    if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
+                        return false;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
+                        return false;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
+                        return false;
+                    }
+                    var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
+                    if (resolveModuleNamesWorker) {
+                        var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
+                        var resolutions = resolveModuleNamesWorker(moduleNames, newSourceFilePath);
+                        var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
+                        if (resolutionsChanged) {
+                            return false;
+                        }
+                    }
+                    if (resolveTypeReferenceDirectiveNamesWorker) {
+                        var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
+                        var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
+                        var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
+                        if (resolutionsChanged) {
+                            return false;
+                        }
+                    }
+                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
+                    newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
+                    modifiedSourceFiles.push(newSourceFile);
+                }
+                else {
+                    newSourceFile = oldSourceFile;
+                }
+                newSourceFiles.push(newSourceFile);
+            }
+            for (var i = 0, len = newSourceFiles.length; i < len; i++) {
+                filesByName.set(filePaths[i], newSourceFiles[i]);
+            }
+            files = newSourceFiles;
+            fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
+            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
+                var modifiedFile = modifiedSourceFiles_1[_b];
+                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile);
+            }
+            resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
+            oldProgram.structureIsReused = true;
+            return true;
+        }
+        function getEmitHost(writeFileCallback) {
+            return {
+                getCanonicalFileName: getCanonicalFileName,
+                getCommonSourceDirectory: program.getCommonSourceDirectory,
+                getCompilerOptions: program.getCompilerOptions,
+                getCurrentDirectory: function () { return currentDirectory; },
+                getNewLine: function () { return host.getNewLine(); },
+                getSourceFile: program.getSourceFile,
+                getSourceFileByPath: program.getSourceFileByPath,
+                getSourceFiles: program.getSourceFiles,
+                writeFile: writeFileCallback || (function (fileName, data, writeByteOrderMark, onError, sourceFiles) { return host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles); }),
+                isEmitBlocked: isEmitBlocked
+            };
+        }
+        function getDiagnosticsProducingTypeChecker() {
+            return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, true));
+        }
+        function getTypeChecker() {
+            return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, false));
+        }
+        function emit(sourceFile, writeFileCallback, cancellationToken) {
+            var _this = this;
+            return runWithCancellationToken(function () { return emitWorker(_this, sourceFile, writeFileCallback, cancellationToken); });
+        }
+        function isEmitBlocked(emitFileName) {
+            return hasEmitBlockingDiagnostics.contains(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName));
+        }
+        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken) {
+            var declarationDiagnostics = [];
+            if (options.noEmit) {
+                return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
+            }
+            if (options.noEmitOnError) {
+                var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
+                if (diagnostics.length === 0 && program.getCompilerOptions().declaration) {
+                    declarationDiagnostics = program.getDeclarationDiagnostics(undefined, cancellationToken);
+                }
+                if (diagnostics.length > 0 || declarationDiagnostics.length > 0) {
+                    return {
+                        diagnostics: ts.concatenate(diagnostics, declarationDiagnostics),
+                        sourceMaps: undefined,
+                        emittedFiles: undefined,
+                        emitSkipped: true
+                    };
+                }
+            }
+            var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile);
+            var start = new Date().getTime();
+            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile);
+            ts.emitTime += new Date().getTime() - start;
+            return emitResult;
+        }
+        function getSourceFile(fileName) {
+            return getSourceFileByPath(ts.toPath(fileName, currentDirectory, getCanonicalFileName));
+        }
+        function getSourceFileByPath(path) {
+            return filesByName.get(path);
+        }
+        function getDiagnosticsHelper(sourceFile, getDiagnostics, cancellationToken) {
+            if (sourceFile) {
+                return getDiagnostics(sourceFile, cancellationToken);
+            }
+            var allDiagnostics = [];
+            ts.forEach(program.getSourceFiles(), function (sourceFile) {
+                if (cancellationToken) {
+                    cancellationToken.throwIfCancellationRequested();
+                }
+                ts.addRange(allDiagnostics, getDiagnostics(sourceFile, cancellationToken));
+            });
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function getSyntacticDiagnostics(sourceFile, cancellationToken) {
+            return getDiagnosticsHelper(sourceFile, getSyntacticDiagnosticsForFile, cancellationToken);
+        }
+        function getSemanticDiagnostics(sourceFile, cancellationToken) {
+            return getDiagnosticsHelper(sourceFile, getSemanticDiagnosticsForFile, cancellationToken);
+        }
+        function getDeclarationDiagnostics(sourceFile, cancellationToken) {
+            var options = program.getCompilerOptions();
+            if (!sourceFile || options.out || options.outFile) {
+                return getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+            }
+            else {
+                return getDiagnosticsHelper(sourceFile, getDeclarationDiagnosticsForFile, cancellationToken);
+            }
+        }
+        function getSyntacticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return sourceFile.parseDiagnostics;
+        }
+        function runWithCancellationToken(func) {
+            try {
+                return func();
+            }
+            catch (e) {
+                if (e instanceof ts.OperationCanceledException) {
+                    noDiagnosticsTypeChecker = undefined;
+                    diagnosticsProducingTypeChecker = undefined;
+                }
+                throw e;
+            }
+        }
+        function getSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var typeChecker = getDiagnosticsProducingTypeChecker();
+                ts.Debug.assert(!!sourceFile.bindDiagnostics);
+                var bindDiagnostics = sourceFile.bindDiagnostics;
+                var checkDiagnostics = ts.isSourceFileJavaScript(sourceFile) ?
+                    getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) :
+                    typeChecker.getDiagnostics(sourceFile, cancellationToken);
+                var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
+                var programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
+                return bindDiagnostics.concat(checkDiagnostics).concat(fileProcessingDiagnosticsInFile).concat(programDiagnosticsInFile);
+            });
+        }
+        function getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var diagnostics = [];
+                walk(sourceFile);
+                return diagnostics;
+                function walk(node) {
+                    if (!node) {
+                        return false;
+                    }
+                    switch (node.kind) {
+                        case 229:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 235:
+                            if (node.isExportEquals) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 221:
+                            var classDeclaration = node;
+                            if (checkModifiers(classDeclaration.modifiers) ||
+                                checkTypeParameters(classDeclaration.typeParameters)) {
+                                return true;
+                            }
+                            break;
+                        case 251:
+                            var heritageClause = node;
+                            if (heritageClause.token === 106) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 222:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 225:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 223:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 147:
+                        case 146:
+                        case 148:
+                        case 149:
+                        case 150:
+                        case 179:
+                        case 220:
+                        case 180:
+                        case 220:
+                            var functionDeclaration = node;
+                            if (checkModifiers(functionDeclaration.modifiers) ||
+                                checkTypeParameters(functionDeclaration.typeParameters) ||
+                                checkTypeAnnotation(functionDeclaration.type)) {
+                                return true;
+                            }
+                            break;
+                        case 200:
+                            var variableStatement = node;
+                            if (checkModifiers(variableStatement.modifiers)) {
+                                return true;
+                            }
+                            break;
+                        case 218:
+                            var variableDeclaration = node;
+                            if (checkTypeAnnotation(variableDeclaration.type)) {
+                                return true;
+                            }
+                            break;
+                        case 174:
+                        case 175:
+                            var expression = node;
+                            if (expression.typeArguments && expression.typeArguments.length > 0) {
+                                var start_2 = expression.typeArguments.pos;
+                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_2, expression.typeArguments.end - start_2, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 142:
+                            var parameter = node;
+                            if (parameter.modifiers) {
+                                var start_3 = parameter.modifiers.pos;
+                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_3, parameter.modifiers.end - start_3, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            if (parameter.questionToken) {
+                                diagnostics.push(ts.createDiagnosticForNode(parameter.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
+                                return true;
+                            }
+                            if (parameter.type) {
+                                diagnostics.push(ts.createDiagnosticForNode(parameter.type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 145:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.property_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 224:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 177:
+                            var typeAssertionExpression = node;
+                            diagnostics.push(ts.createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 143:
+                            if (!options.experimentalDecorators) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
+                            }
+                            return true;
+                    }
+                    return ts.forEachChild(node, walk);
+                }
+                function checkTypeParameters(typeParameters) {
+                    if (typeParameters) {
+                        var start_4 = typeParameters.pos;
+                        diagnostics.push(ts.createFileDiagnostic(sourceFile, start_4, typeParameters.end - start_4, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
+                        return true;
+                    }
+                    return false;
+                }
+                function checkTypeAnnotation(type) {
+                    if (type) {
+                        diagnostics.push(ts.createDiagnosticForNode(type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
+                        return true;
+                    }
+                    return false;
+                }
+                function checkModifiers(modifiers) {
+                    if (modifiers) {
+                        for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
+                            var modifier = modifiers_1[_i];
+                            switch (modifier.kind) {
+                                case 112:
+                                case 110:
+                                case 111:
+                                case 128:
+                                case 122:
+                                    diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
+                                    return true;
+                                case 113:
+                                case 82:
+                                case 74:
+                                case 77:
+                                case 115:
+                            }
+                        }
+                    }
+                    return false;
+                }
+            });
+        }
+        function getDeclarationDiagnosticsWorker(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
+                var writeFile = function () { };
+                return ts.getDeclarationDiagnostics(getEmitHost(writeFile), resolver, sourceFile);
+            });
+        }
+        function getDeclarationDiagnosticsForFile(sourceFile, cancellationToken) {
+            return ts.isDeclarationFile(sourceFile) ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+        }
+        function getOptionsDiagnostics() {
+            var allDiagnostics = [];
+            ts.addRange(allDiagnostics, fileProcessingDiagnostics.getGlobalDiagnostics());
+            ts.addRange(allDiagnostics, programDiagnostics.getGlobalDiagnostics());
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function getGlobalDiagnostics() {
+            var allDiagnostics = [];
+            ts.addRange(allDiagnostics, getDiagnosticsProducingTypeChecker().getGlobalDiagnostics());
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function hasExtension(fileName) {
+            return ts.getBaseFileName(fileName).indexOf(".") >= 0;
+        }
+        function processRootFile(fileName, isDefaultLib) {
+            processSourceFile(ts.normalizePath(fileName), isDefaultLib, true);
+        }
+        function fileReferenceIsEqualTo(a, b) {
+            return a.fileName === b.fileName;
+        }
+        function moduleNameIsEqualTo(a, b) {
+            return a.text === b.text;
+        }
+        function getTextOfLiteral(literal) {
+            return literal.text;
+        }
+        function collectExternalModuleReferences(file) {
+            if (file.imports) {
+                return;
+            }
+            var isJavaScriptFile = ts.isSourceFileJavaScript(file);
+            var isExternalModuleFile = ts.isExternalModule(file);
+            var imports;
+            var moduleAugmentations;
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var node = _a[_i];
+                collectModuleReferences(node, false);
+                if (isJavaScriptFile) {
+                    collectRequireCalls(node);
+                }
+            }
+            file.imports = imports || emptyArray;
+            file.moduleAugmentations = moduleAugmentations || emptyArray;
+            return;
+            function collectModuleReferences(node, inAmbientModule) {
+                switch (node.kind) {
+                    case 230:
+                    case 229:
+                    case 236:
+                        var moduleNameExpr = ts.getExternalModuleName(node);
+                        if (!moduleNameExpr || moduleNameExpr.kind !== 9) {
+                            break;
+                        }
+                        if (!moduleNameExpr.text) {
+                            break;
+                        }
+                        if (!inAmbientModule || !ts.isExternalModuleNameRelative(moduleNameExpr.text)) {
+                            (imports || (imports = [])).push(moduleNameExpr);
+                        }
+                        break;
+                    case 225:
+                        if (ts.isAmbientModule(node) && (inAmbientModule || node.flags & 2 || ts.isDeclarationFile(file))) {
+                            var moduleName = node.name;
+                            if (isExternalModuleFile || (inAmbientModule && !ts.isExternalModuleNameRelative(moduleName.text))) {
+                                (moduleAugmentations || (moduleAugmentations = [])).push(moduleName);
+                            }
+                            else if (!inAmbientModule) {
+                                for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
+                                    var statement = _a[_i];
+                                    collectModuleReferences(statement, true);
+                                }
+                            }
+                        }
+                }
+            }
+            function collectRequireCalls(node) {
+                if (ts.isRequireCall(node, true)) {
+                    (imports || (imports = [])).push(node.arguments[0]);
+                }
+                else {
+                    ts.forEachChild(node, collectRequireCalls);
+                }
+            }
+        }
+        function processSourceFile(fileName, isDefaultLib, isReference, refFile, refPos, refEnd) {
+            var diagnosticArgument;
+            var diagnostic;
+            if (hasExtension(fileName)) {
+                if (!options.allowNonTsExtensions && !ts.forEach(supportedExtensions, function (extension) { return ts.fileExtensionIs(host.getCanonicalFileName(fileName), extension); })) {
+                    diagnostic = ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1;
+                    diagnosticArgument = [fileName, "'" + supportedExtensions.join("', '") + "'"];
+                }
+                else if (!findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd)) {
+                    diagnostic = ts.Diagnostics.File_0_not_found;
+                    diagnosticArgument = [fileName];
+                }
+                else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
+                    diagnostic = ts.Diagnostics.A_file_cannot_have_a_reference_to_itself;
+                    diagnosticArgument = [fileName];
+                }
+            }
+            else {
+                var nonTsFile = options.allowNonTsExtensions && findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd);
+                if (!nonTsFile) {
+                    if (options.allowNonTsExtensions) {
+                        diagnostic = ts.Diagnostics.File_0_not_found;
+                        diagnosticArgument = [fileName];
+                    }
+                    else if (!ts.forEach(supportedExtensions, function (extension) { return findSourceFile(fileName + extension, ts.toPath(fileName + extension, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd); })) {
+                        diagnostic = ts.Diagnostics.File_0_not_found;
+                        fileName += ".ts";
+                        diagnosticArgument = [fileName];
+                    }
+                }
+            }
+            if (diagnostic) {
+                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
+                    fileProcessingDiagnostics.add(ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(diagnosticArgument)));
+                }
+                else {
+                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(diagnosticArgument)));
+                }
+            }
+        }
+        function reportFileNamesDifferOnlyInCasingError(fileName, existingFileName, refFile, refPos, refEnd) {
+            if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
+            }
+            else {
+                fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
+            }
+        }
+        function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) {
+            if (filesByName.contains(path)) {
+                var file_1 = filesByName.get(path);
+                if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
+                    reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
+                }
+                return file_1;
+            }
+            var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
+                if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                    fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
+                }
+                else {
+                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
+                }
+            });
+            filesByName.set(path, file);
+            if (file) {
+                file.path = path;
+                if (host.useCaseSensitiveFileNames()) {
+                    var existingFile = filesByNameIgnoreCase.get(path);
+                    if (existingFile) {
+                        reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd);
+                    }
+                    else {
+                        filesByNameIgnoreCase.set(path, file);
+                    }
+                }
+                skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
+                var basePath = ts.getDirectoryPath(fileName);
+                if (!options.noResolve) {
+                    processReferencedFiles(file, basePath, isDefaultLib);
+                    processTypeReferenceDirectives(file);
+                }
+                processImportedModules(file, basePath);
+                if (isDefaultLib) {
+                    files.unshift(file);
+                }
+                else {
+                    files.push(file);
+                }
+            }
+            return file;
+        }
+        function processReferencedFiles(file, basePath, isDefaultLib) {
+            ts.forEach(file.referencedFiles, function (ref) {
+                var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
+                processSourceFile(referencedFileName, isDefaultLib, true, file, ref.pos, ref.end);
+            });
+        }
+        function processTypeReferenceDirectives(file) {
+            var typeDirectives = ts.map(file.typeReferenceDirectives, function (l) { return l.fileName; });
+            var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeDirectives, file.fileName);
+            for (var i = 0; i < typeDirectives.length; i++) {
+                var ref = file.typeReferenceDirectives[i];
+                var resolvedTypeReferenceDirective = resolutions[i];
+                ts.setResolvedTypeReferenceDirective(file, ref.fileName, resolvedTypeReferenceDirective);
+                processTypeReferenceDirective(ref.fileName, resolvedTypeReferenceDirective, file, ref.pos, ref.end);
+            }
+        }
+        function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
+            var previousResolution = resolvedTypeReferenceDirectives[typeReferenceDirective];
+            if (previousResolution && previousResolution.primary) {
+                return;
+            }
+            var saveResolution = true;
+            if (resolvedTypeReferenceDirective) {
+                if (resolvedTypeReferenceDirective.primary) {
+                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, true, refFile, refPos, refEnd);
+                }
+                else {
+                    if (previousResolution) {
+                        var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
+                        if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
+                            fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
+                        }
+                        saveResolution = false;
+                    }
+                    else {
+                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, true, refFile, refPos, refEnd);
+                    }
+                }
+            }
+            else {
+                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_name_0, typeReferenceDirective));
+            }
+            if (saveResolution) {
+                resolvedTypeReferenceDirectives[typeReferenceDirective] = resolvedTypeReferenceDirective;
+            }
+        }
+        function createDiagnostic(refFile, refPos, refEnd, message) {
+            var args = [];
+            for (var _i = 4; _i < arguments.length; _i++) {
+                args[_i - 4] = arguments[_i];
+            }
+            if (refFile === undefined || refPos === undefined || refEnd === undefined) {
+                return ts.createCompilerDiagnostic.apply(void 0, [message].concat(args));
+            }
+            else {
+                return ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, message].concat(args));
+            }
+        }
+        function getCanonicalFileName(fileName) {
+            return host.getCanonicalFileName(fileName);
+        }
+        function processImportedModules(file, basePath) {
+            collectExternalModuleReferences(file);
+            if (file.imports.length || file.moduleAugmentations.length) {
+                file.resolvedModules = {};
+                var moduleNames = ts.map(ts.concatenate(file.imports, file.moduleAugmentations), getTextOfLiteral);
+                var resolutions = resolveModuleNamesWorker(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory));
+                for (var i = 0; i < moduleNames.length; i++) {
+                    var resolution = resolutions[i];
+                    ts.setResolvedModule(file, moduleNames[i], resolution);
+                    var shouldAddFile = resolution &&
+                        !options.noResolve &&
+                        i < file.imports.length;
+                    if (shouldAddFile) {
+                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), false, false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
+                    }
+                }
+            }
+            else {
+                file.resolvedModules = undefined;
+            }
+            return;
+        }
+        function computeCommonSourceDirectory(sourceFiles) {
+            var fileNames = [];
+            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
+                var file = sourceFiles_2[_i];
+                if (!file.isDeclarationFile) {
+                    fileNames.push(file.fileName);
+                }
+            }
+            return computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName);
+        }
+        function checkSourceFilesBelongToPath(sourceFiles, rootDirectory) {
+            var allFilesBelongToPath = true;
+            if (sourceFiles) {
+                var absoluteRootDirectoryPath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(rootDirectory, currentDirectory));
+                for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
+                    var sourceFile = sourceFiles_3[_i];
+                    if (!ts.isDeclarationFile(sourceFile)) {
+                        var absoluteSourceFilePath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
+                        if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
+                            programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
+                            allFilesBelongToPath = false;
+                        }
+                    }
+                }
+            }
+            return allFilesBelongToPath;
+        }
+        function verifyCompilerOptions() {
+            if (options.isolatedModules) {
+                if (options.declaration) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules"));
+                }
+                if (options.noEmitOnError) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules"));
+                }
+                if (options.out) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules"));
+                }
+                if (options.outFile) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules"));
+                }
+            }
+            if (options.inlineSourceMap) {
+                if (options.sourceMap) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap"));
+                }
+                if (options.mapRoot) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap"));
+                }
+            }
+            if (options.paths && options.baseUrl === undefined) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option));
+            }
+            if (options.paths) {
+                for (var key in options.paths) {
+                    if (!ts.hasProperty(options.paths, key)) {
+                        continue;
+                    }
+                    if (!hasZeroOrOneAsteriskCharacter(key)) {
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key));
+                    }
+                    if (ts.isArray(options.paths[key])) {
+                        for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
+                            var subst = _a[_i];
+                            var typeOfSubst = typeof subst;
+                            if (typeOfSubst === "string") {
+                                if (!hasZeroOrOneAsteriskCharacter(subst)) {
+                                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key));
+                                }
+                            }
+                            else {
+                                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst));
+                            }
+                        }
+                    }
+                    else {
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
+                    }
+                }
+            }
+            if (!options.sourceMap && !options.inlineSourceMap) {
+                if (options.inlineSources) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "inlineSources"));
+                }
+                if (options.sourceRoot) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "sourceRoot"));
+                }
+            }
+            if (options.out && options.outFile) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
+            }
+            if (options.mapRoot && !options.sourceMap) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
+            }
+            if (options.declarationDir) {
+                if (!options.declaration) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration"));
+                }
+                if (options.out || options.outFile) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile"));
+                }
+            }
+            if (options.lib && options.noLib) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib"));
+            }
+            var languageVersion = options.target || 0;
+            var outFile = options.outFile || options.out;
+            var firstExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) ? f : undefined; });
+            if (options.isolatedModules) {
+                if (options.module === ts.ModuleKind.None && languageVersion < 2) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
+                }
+                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
+                if (firstNonExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
+                }
+            }
+            else if (firstExternalModuleSourceFile && languageVersion < 2 && options.module === ts.ModuleKind.None) {
+                var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
+            }
+            if (options.module === ts.ModuleKind.ES6 && languageVersion < 2) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
+            }
+            if (outFile) {
+                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+                }
+                else if (options.module === undefined && firstExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
+                }
+            }
+            if (options.outDir ||
+                options.sourceRoot ||
+                options.mapRoot) {
+                var dir = getCommonSourceDirectory();
+                if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files));
+                }
+            }
+            if (!options.noEmit && options.allowJs && options.declaration) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration"));
+            }
+            if (options.emitDecoratorMetadata &&
+                !options.experimentalDecorators) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators"));
+            }
+            if (options.reactNamespace && !ts.isIdentifier(options.reactNamespace, languageVersion)) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace));
+            }
+            if (!options.noEmit && !options.suppressOutputPathCheck) {
+                var emitHost = getEmitHost();
+                var emitFilesSeen_1 = ts.createFileMap(!host.useCaseSensitiveFileNames() ? function (key) { return key.toLocaleLowerCase(); } : undefined);
+                ts.forEachExpectedEmitFile(emitHost, function (emitFileNames, sourceFiles, isBundledEmit) {
+                    verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen_1);
+                    verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
+                });
+            }
+            function verifyEmitFilePath(emitFileName, emitFilesSeen) {
+                if (emitFileName) {
+                    var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName);
+                    if (filesByName.contains(emitFilePath)) {
+                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file);
+                    }
+                    if (emitFilesSeen.contains(emitFilePath)) {
+                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files);
+                    }
+                    else {
+                        emitFilesSeen.set(emitFilePath, true);
+                    }
+                }
+            }
+        }
+        function createEmitBlockingDiagnostics(emitFileName, emitFilePath, message) {
+            hasEmitBlockingDiagnostics.set(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName), true);
+            programDiagnostics.add(ts.createCompilerDiagnostic(message, emitFileName));
+        }
+    }
+    ts.createProgram = createProgram;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.optionDeclarations = [
+        {
+            name: "charset",
+            type: "string"
+        },
+        {
+            name: "declaration",
+            shortName: "d",
+            type: "boolean",
+            description: ts.Diagnostics.Generates_corresponding_d_ts_file
+        },
+        {
+            name: "declarationDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "diagnostics",
+            type: "boolean"
+        },
+        {
+            name: "emitBOM",
+            type: "boolean"
+        },
+        {
+            name: "help",
+            shortName: "h",
+            type: "boolean",
+            description: ts.Diagnostics.Print_this_message
+        },
+        {
+            name: "help",
+            shortName: "?",
+            type: "boolean"
+        },
+        {
+            name: "init",
+            type: "boolean",
+            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file
+        },
+        {
+            name: "inlineSourceMap",
+            type: "boolean"
+        },
+        {
+            name: "inlineSources",
+            type: "boolean"
+        },
+        {
+            name: "jsx",
+            type: {
+                "preserve": 1,
+                "react": 2
+            },
+            paramType: ts.Diagnostics.KIND,
+            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_or_react
+        },
+        {
+            name: "reactNamespace",
+            type: "string",
+            description: ts.Diagnostics.Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit
+        },
+        {
+            name: "listFiles",
+            type: "boolean"
+        },
+        {
+            name: "locale",
+            type: "string"
+        },
+        {
+            name: "mapRoot",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
+            paramType: ts.Diagnostics.LOCATION
+        },
+        {
+            name: "module",
+            shortName: "m",
+            type: {
+                "none": ts.ModuleKind.None,
+                "commonjs": ts.ModuleKind.CommonJS,
+                "amd": ts.ModuleKind.AMD,
+                "system": ts.ModuleKind.System,
+                "umd": ts.ModuleKind.UMD,
+                "es6": ts.ModuleKind.ES6,
+                "es2015": ts.ModuleKind.ES2015
+            },
+            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
+            paramType: ts.Diagnostics.KIND
+        },
+        {
+            name: "newLine",
+            type: {
+                "crlf": 0,
+                "lf": 1
+            },
+            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
+            paramType: ts.Diagnostics.NEWLINE
+        },
+        {
+            name: "noEmit",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_outputs
+        },
+        {
+            name: "noEmitHelpers",
+            type: "boolean"
+        },
+        {
+            name: "noEmitOnError",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported
+        },
+        {
+            name: "noImplicitAny",
+            type: "boolean",
+            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type
+        },
+        {
+            name: "noImplicitThis",
+            type: "boolean",
+            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type
+        },
+        {
+            name: "noLib",
+            type: "boolean"
+        },
+        {
+            name: "noResolve",
+            type: "boolean"
+        },
+        {
+            name: "skipDefaultLibCheck",
+            type: "boolean"
+        },
+        {
+            name: "skipLibCheck",
+            type: "boolean",
+            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
+        },
+        {
+            name: "out",
+            type: "string",
+            isFilePath: false,
+            paramType: ts.Diagnostics.FILE
+        },
+        {
+            name: "outFile",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
+            paramType: ts.Diagnostics.FILE
+        },
+        {
+            name: "outDir",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "preserveConstEnums",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
+        },
+        {
+            name: "pretty",
+            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental,
+            type: "boolean"
+        },
+        {
+            name: "project",
+            shortName: "p",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Compile_the_project_in_the_given_directory,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "removeComments",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_comments_to_output
+        },
+        {
+            name: "rootDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.LOCATION,
+            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir
+        },
+        {
+            name: "isolatedModules",
+            type: "boolean"
+        },
+        {
+            name: "sourceMap",
+            type: "boolean",
+            description: ts.Diagnostics.Generates_corresponding_map_file
+        },
+        {
+            name: "sourceRoot",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
+            paramType: ts.Diagnostics.LOCATION
+        },
+        {
+            name: "suppressExcessPropertyErrors",
+            type: "boolean",
+            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
+            experimental: true
+        },
+        {
+            name: "suppressImplicitAnyIndexErrors",
+            type: "boolean",
+            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures
+        },
+        {
+            name: "stripInternal",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
+            experimental: true
+        },
+        {
+            name: "target",
+            shortName: "t",
+            type: {
+                "es3": 0,
+                "es5": 1,
+                "es6": 2,
+                "es2015": 2
+            },
+            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
+            paramType: ts.Diagnostics.VERSION
+        },
+        {
+            name: "version",
+            shortName: "v",
+            type: "boolean",
+            description: ts.Diagnostics.Print_the_compiler_s_version
+        },
+        {
+            name: "watch",
+            shortName: "w",
+            type: "boolean",
+            description: ts.Diagnostics.Watch_input_files
+        },
+        {
+            name: "experimentalDecorators",
+            type: "boolean",
+            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
+        },
+        {
+            name: "emitDecoratorMetadata",
+            type: "boolean",
+            experimental: true,
+            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
+        },
+        {
+            name: "moduleResolution",
+            type: {
+                "node": ts.ModuleResolutionKind.NodeJs,
+                "classic": ts.ModuleResolutionKind.Classic
+            },
+            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6
+        },
+        {
+            name: "allowUnusedLabels",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
+        },
+        {
+            name: "noImplicitReturns",
+            type: "boolean",
+            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
+        },
+        {
+            name: "noFallthroughCasesInSwitch",
+            type: "boolean",
+            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
+        },
+        {
+            name: "allowUnreachableCode",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
+        },
+        {
+            name: "forceConsistentCasingInFileNames",
+            type: "boolean",
+            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
+        },
+        {
+            name: "baseUrl",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
+        },
+        {
+            name: "paths",
+            type: "object",
+            isTSConfigOnly: true
+        },
+        {
+            name: "rootDirs",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "rootDirs",
+                type: "string",
+                isFilePath: true
+            }
+        },
+        {
+            name: "typesSearchPaths",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "typesSearchPaths",
+                type: "string",
+                isFilePath: true
+            }
+        },
+        {
+            name: "typesRoot",
+            type: "string"
+        },
+        {
+            name: "types",
+            type: "list",
+            element: {
+                name: "types",
+                type: "string"
+            },
+            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
+        },
+        {
+            name: "traceResolution",
+            type: "boolean",
+            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
+        },
+        {
+            name: "allowJs",
+            type: "boolean",
+            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
+        },
+        {
+            name: "allowSyntheticDefaultImports",
+            type: "boolean",
+            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
+        },
+        {
+            name: "noImplicitUseStrict",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
+        },
+        {
+            name: "listEmittedFiles",
+            type: "boolean"
+        },
+        {
+            name: "lib",
+            type: "list",
+            element: {
+                name: "lib",
+                type: {
+                    "es5": "lib.es5.d.ts",
+                    "es6": "lib.es2015.d.ts",
+                    "es2015": "lib.es2015.d.ts",
+                    "es7": "lib.es2016.d.ts",
+                    "es2016": "lib.es2016.d.ts",
+                    "es2017": "lib.es2017.d.ts",
+                    "dom": "lib.dom.d.ts",
+                    "webworker": "lib.webworker.d.ts",
+                    "scripthost": "lib.scripthost.d.ts",
+                    "es2015.core": "lib.es2015.core.d.ts",
+                    "es2015.collection": "lib.es2015.collection.d.ts",
+                    "es2015.generator": "lib.es2015.generator.d.ts",
+                    "es2015.iterable": "lib.es2015.iterable.d.ts",
+                    "es2015.promise": "lib.es2015.promise.d.ts",
+                    "es2015.proxy": "lib.es2015.proxy.d.ts",
+                    "es2015.reflect": "lib.es2015.reflect.d.ts",
+                    "es2015.symbol": "lib.es2015.symbol.d.ts",
+                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
+                    "es2016.array.include": "lib.es2016.array.include.d.ts",
+                    "es2017.object": "lib.es2017.object.d.ts",
+                    "es2017.sharedmemory": "lib.es2017.sharedmemory.d.ts"
+                }
+            },
+            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
+        },
+        {
+            name: "strictNullChecks",
+            type: "boolean",
+            description: ts.Diagnostics.Enable_strict_null_checks
+        }
+    ];
+    ts.typingOptionDeclarations = [
+        {
+            name: "enableAutoDiscovery",
+            type: "boolean"
+        },
+        {
+            name: "include",
+            type: "list",
+            element: {
+                name: "include",
+                type: "string"
+            }
+        },
+        {
+            name: "exclude",
+            type: "list",
+            element: {
+                name: "exclude",
+                type: "string"
+            }
+        }
+    ];
+    var optionNameMapCache;
+    function getOptionNameMap() {
+        if (optionNameMapCache) {
+            return optionNameMapCache;
+        }
+        var optionNameMap = {};
+        var shortOptionNames = {};
+        ts.forEach(ts.optionDeclarations, function (option) {
+            optionNameMap[option.name.toLowerCase()] = option;
+            if (option.shortName) {
+                shortOptionNames[option.shortName] = option.name;
+            }
+        });
+        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
+        return optionNameMapCache;
+    }
+    ts.getOptionNameMap = getOptionNameMap;
+    function createCompilerDiagnosticForInvalidCustomType(opt) {
+        var namesOfType = [];
+        ts.forEachKey(opt.type, function (key) {
+            namesOfType.push(" '" + key + "'");
+        });
+        return ts.createCompilerDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
+    }
+    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
+    function parseCustomTypeOption(opt, value, errors) {
+        var key = trimString((value || "")).toLowerCase();
+        var map = opt.type;
+        if (ts.hasProperty(map, key)) {
+            return map[key];
+        }
+        else {
+            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
+        }
+    }
+    ts.parseCustomTypeOption = parseCustomTypeOption;
+    function parseListTypeOption(opt, value, errors) {
+        var values = trimString((value || "")).split(",");
+        switch (opt.element.type) {
+            case "number":
+                return ts.map(values, parseInt);
+            case "string":
+                return ts.map(values, function (v) { return v || ""; });
+            default:
+                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
+        }
+    }
+    ts.parseListTypeOption = parseListTypeOption;
+    function parseCommandLine(commandLine, readFile) {
+        var options = {};
+        var fileNames = [];
+        var errors = [];
+        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
+        parseStrings(commandLine);
+        return {
+            options: options,
+            fileNames: fileNames,
+            errors: errors
+        };
+        function parseStrings(args) {
+            var i = 0;
+            while (i < args.length) {
+                var s = args[i];
+                i++;
+                if (s.charCodeAt(0) === 64) {
+                    parseResponseFile(s.slice(1));
+                }
+                else if (s.charCodeAt(0) === 45) {
+                    s = s.slice(s.charCodeAt(1) === 45 ? 2 : 1).toLowerCase();
+                    if (ts.hasProperty(shortOptionNames, s)) {
+                        s = shortOptionNames[s];
+                    }
+                    if (ts.hasProperty(optionNameMap, s)) {
+                        var opt = optionNameMap[s];
+                        if (opt.isTSConfigOnly) {
+                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
+                        }
+                        else {
+                            if (!args[i] && opt.type !== "boolean") {
+                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
+                            }
+                            switch (opt.type) {
+                                case "number":
+                                    options[opt.name] = parseInt(args[i]);
+                                    i++;
+                                    break;
+                                case "boolean":
+                                    options[opt.name] = true;
+                                    break;
+                                case "string":
+                                    options[opt.name] = args[i] || "";
+                                    i++;
+                                    break;
+                                case "list":
+                                    options[opt.name] = parseListTypeOption(opt, args[i], errors);
+                                    i++;
+                                    break;
+                                default:
+                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
+                                    i++;
+                                    break;
+                            }
+                        }
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
+                    }
+                }
+                else {
+                    fileNames.push(s);
+                }
+            }
+        }
+        function parseResponseFile(fileName) {
+            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
+            if (!text) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
+                return;
+            }
+            var args = [];
+            var pos = 0;
+            while (true) {
+                while (pos < text.length && text.charCodeAt(pos) <= 32)
+                    pos++;
+                if (pos >= text.length)
+                    break;
+                var start = pos;
+                if (text.charCodeAt(start) === 34) {
+                    pos++;
+                    while (pos < text.length && text.charCodeAt(pos) !== 34)
+                        pos++;
+                    if (pos < text.length) {
+                        args.push(text.substring(start + 1, pos));
+                        pos++;
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
+                    }
+                }
+                else {
+                    while (text.charCodeAt(pos) > 32)
+                        pos++;
+                    args.push(text.substring(start, pos));
+                }
+            }
+            parseStrings(args);
+        }
+    }
+    ts.parseCommandLine = parseCommandLine;
+    function readConfigFile(fileName, readFile) {
+        var text = "";
+        try {
+            text = readFile(fileName);
+        }
+        catch (e) {
+            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
+        }
+        return parseConfigFileTextToJson(fileName, text);
+    }
+    ts.readConfigFile = readConfigFile;
+    function parseConfigFileTextToJson(fileName, jsonText) {
+        try {
+            var jsonTextWithoutComments = removeComments(jsonText);
+            return { config: /\S/.test(jsonTextWithoutComments) ? JSON.parse(jsonTextWithoutComments) : {} };
+        }
+        catch (e) {
+            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) };
+        }
+    }
+    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
+    function removeComments(jsonText) {
+        var output = "";
+        var scanner = ts.createScanner(1, false, 0, jsonText);
+        var token;
+        while ((token = scanner.scan()) !== 1) {
+            switch (token) {
+                case 2:
+                case 3:
+                    output += scanner.getTokenText().replace(/\S/g, " ");
+                    break;
+                default:
+                    output += scanner.getTokenText();
+                    break;
+            }
+        }
+        return output;
+    }
+    var IgnoreFileNamePattern = /(\.min\.js$)|([\\/]\.[\w.])/;
+    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName) {
+        if (existingOptions === void 0) { existingOptions = {}; }
+        var errors = [];
+        var compilerOptions = convertCompilerOptionsFromJsonWorker(json["compilerOptions"], basePath, errors, configFileName);
+        var options = ts.extend(existingOptions, compilerOptions);
+        var typingOptions = convertTypingOptionsFromJsonWorker(json["typingOptions"], basePath, errors, configFileName);
+        options.configFilePath = configFileName;
+        var fileNames = getFileNames(errors);
+        return {
+            options: options,
+            fileNames: fileNames,
+            typingOptions: typingOptions,
+            raw: json,
+            errors: errors
+        };
+        function getFileNames(errors) {
+            var fileNames = [];
+            if (ts.hasProperty(json, "files")) {
+                if (ts.isArray(json["files"])) {
+                    fileNames = ts.map(json["files"], function (s) { return ts.combinePaths(basePath, s); });
+                }
+                else {
+                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
+                }
+            }
+            else {
+                var filesSeen = {};
+                var exclude = [];
+                if (ts.isArray(json["exclude"])) {
+                    exclude = json["exclude"];
+                }
+                else {
+                    exclude = ["node_modules", "bower_components", "jspm_packages"];
+                }
+                var outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
+                if (outDir) {
+                    exclude.push(outDir);
+                }
+                exclude = ts.map(exclude, function (e) { return ts.getNormalizedAbsolutePath(e, basePath); });
+                var supportedExtensions = ts.getSupportedExtensions(options);
+                ts.Debug.assert(ts.indexOf(supportedExtensions, ".ts") < ts.indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
+                for (var _i = 0, supportedExtensions_1 = supportedExtensions; _i < supportedExtensions_1.length; _i++) {
+                    var extension = supportedExtensions_1[_i];
+                    var filesInDirWithExtension = host.readDirectory(basePath, extension, exclude);
+                    for (var _a = 0, filesInDirWithExtension_1 = filesInDirWithExtension; _a < filesInDirWithExtension_1.length; _a++) {
+                        var fileName = filesInDirWithExtension_1[_a];
+                        if (extension === ".ts" && ts.fileExtensionIs(fileName, ".d.ts")) {
+                            continue;
+                        }
+                        if (IgnoreFileNamePattern.test(fileName)) {
+                            continue;
+                        }
+                        if (extension === ".d.ts" || (options.allowJs && ts.contains(ts.supportedJavascriptExtensions, extension))) {
+                            var baseName = fileName.substr(0, fileName.length - extension.length);
+                            if (ts.hasProperty(filesSeen, baseName + ".ts") || ts.hasProperty(filesSeen, baseName + ".tsx")) {
+                                continue;
+                            }
+                        }
+                        filesSeen[fileName] = true;
+                        fileNames.push(fileName);
+                    }
+                }
+            }
+            if (ts.hasProperty(json, "excludes") && !ts.hasProperty(json, "exclude")) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
+            }
+            return fileNames;
+        }
+    }
+    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
+    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
+    function convertTypingOptionsFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertTypingOptionsFromJson = convertTypingOptionsFromJson;
+    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = ts.getBaseFileName(configFileName) === "jsconfig.json" ? { allowJs: true } : {};
+        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
+        return options;
+    }
+    function convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
+            ? { enableAutoDiscovery: true, include: [], exclude: [] }
+            : { enableAutoDiscovery: false, include: [], exclude: [] };
+        convertOptionsFromJson(ts.typingOptionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_typing_option_0, errors);
+        return options;
+    }
+    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
+        if (!jsonOptions) {
+            return;
+        }
+        var optionNameMap = ts.arrayToMap(optionDeclarations, function (opt) { return opt.name; });
+        for (var id in jsonOptions) {
+            if (ts.hasProperty(optionNameMap, id)) {
+                var opt = optionNameMap[id];
+                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
+            }
+            else {
+                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
+            }
+        }
+    }
+    function convertJsonOption(opt, value, basePath, errors) {
+        var optType = opt.type;
+        var expectedType = typeof optType === "string" ? optType : "string";
+        if (optType === "list" && ts.isArray(value)) {
+            return convertJsonOptionOfListType(opt, value, basePath, errors);
+        }
+        else if (typeof value === expectedType) {
+            if (typeof optType !== "string") {
+                return convertJsonOptionOfCustomType(opt, value, errors);
+            }
+            else {
+                if (opt.isFilePath) {
+                    value = ts.normalizePath(ts.combinePaths(basePath, value));
+                    if (value === "") {
+                        value = ".";
+                    }
+                }
+            }
+            return value;
+        }
+        else {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, expectedType));
+        }
+    }
+    function convertJsonOptionOfCustomType(opt, value, errors) {
+        var key = value.toLowerCase();
+        if (ts.hasProperty(opt.type, key)) {
+            return opt.type[key];
+        }
+        else {
+            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
+        }
+    }
+    function convertJsonOptionOfListType(option, values, basePath, errors) {
+        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
+    }
+    function trimString(s) {
+        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
+    }
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var reportDiagnostic = reportDiagnosticSimply;
+    function reportDiagnostics(diagnostics, host) {
+        for (var _i = 0, diagnostics_1 = diagnostics; _i < diagnostics_1.length; _i++) {
+            var diagnostic = diagnostics_1[_i];
+            reportDiagnostic(diagnostic, host);
+        }
+    }
+    function reportEmittedFiles(files, host) {
+        if (!files || files.length == 0) {
+            return;
+        }
+        var currentDir = ts.sys.getCurrentDirectory();
+        for (var _i = 0, files_4 = files; _i < files_4.length; _i++) {
+            var file = files_4[_i];
+            var filepath = ts.getNormalizedAbsolutePath(file, currentDir);
+            ts.sys.write("TSFILE: " + filepath + ts.sys.newLine);
+        }
+    }
+    function validateLocaleAndSetLanguage(locale, errors) {
+        var matchResult = /^([a-z]+)([_\-]([a-z]+))?$/.exec(locale.toLowerCase());
+        if (!matchResult) {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1, "en", "ja-jp"));
+            return false;
+        }
+        var language = matchResult[1];
+        var territory = matchResult[3];
+        if (!trySetLanguageAndTerritory(language, territory, errors)) {
+            trySetLanguageAndTerritory(language, undefined, errors);
+        }
+        return true;
+    }
+    function trySetLanguageAndTerritory(language, territory, errors) {
+        var compilerFilePath = ts.normalizePath(ts.sys.getExecutingFilePath());
+        var containingDirectoryPath = ts.getDirectoryPath(compilerFilePath);
+        var filePath = ts.combinePaths(containingDirectoryPath, language);
+        if (territory) {
+            filePath = filePath + "-" + territory;
+        }
+        filePath = ts.sys.resolvePath(ts.combinePaths(filePath, "diagnosticMessages.generated.json"));
+        if (!ts.sys.fileExists(filePath)) {
+            return false;
+        }
+        var fileContents = "";
+        try {
+            fileContents = ts.sys.readFile(filePath);
+        }
+        catch (e) {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unable_to_open_file_0, filePath));
+            return false;
+        }
+        try {
+            ts.localizedDiagnosticMessages = JSON.parse(fileContents);
+        }
+        catch (e) {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Corrupted_locale_file_0, filePath));
+            return false;
+        }
+        return true;
+    }
+    function countLines(program) {
+        var count = 0;
+        ts.forEach(program.getSourceFiles(), function (file) {
+            count += ts.getLineStarts(file).length;
+        });
+        return count;
+    }
+    function getDiagnosticText(message) {
+        var args = [];
+        for (var _i = 1; _i < arguments.length; _i++) {
+            args[_i - 1] = arguments[_i];
+        }
+        var diagnostic = ts.createCompilerDiagnostic.apply(undefined, arguments);
+        return diagnostic.messageText;
+    }
+    function getRelativeFileName(fileName, host) {
+        return host ? ts.convertToRelativePath(fileName, host.getCurrentDirectory(), function (fileName) { return host.getCanonicalFileName(fileName); }) : fileName;
+    }
+    function reportDiagnosticSimply(diagnostic, host) {
+        var output = "";
+        if (diagnostic.file) {
+            var _a = ts.getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start), line = _a.line, character = _a.character;
+            var relativeFileName = getRelativeFileName(diagnostic.file.fileName, host);
+            output += relativeFileName + "(" + (line + 1) + "," + (character + 1) + "): ";
+        }
+        var category = ts.DiagnosticCategory[diagnostic.category].toLowerCase();
+        output += category + " TS" + diagnostic.code + ": " + ts.flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine) + ts.sys.newLine;
+        ts.sys.write(output);
+    }
+    var redForegroundEscapeSequence = "\u001b[91m";
+    var yellowForegroundEscapeSequence = "\u001b[93m";
+    var blueForegroundEscapeSequence = "\u001b[93m";
+    var gutterStyleSequence = "\u001b[100;30m";
+    var gutterSeparator = " ";
+    var resetEscapeSequence = "\u001b[0m";
+    var ellipsis = "...";
+    var categoryFormatMap = (_a = {},
+        _a[ts.DiagnosticCategory.Warning] = yellowForegroundEscapeSequence,
+        _a[ts.DiagnosticCategory.Error] = redForegroundEscapeSequence,
+        _a[ts.DiagnosticCategory.Message] = blueForegroundEscapeSequence,
+        _a
+    );
+    function formatAndReset(text, formatStyle) {
+        return formatStyle + text + resetEscapeSequence;
+    }
+    function reportDiagnosticWithColorAndContext(diagnostic, host) {
+        var output = "";
+        if (diagnostic.file) {
+            var start = diagnostic.start, length_3 = diagnostic.length, file = diagnostic.file;
+            var _a = ts.getLineAndCharacterOfPosition(file, start), firstLine = _a.line, firstLineChar = _a.character;
+            var _b = ts.getLineAndCharacterOfPosition(file, start + length_3), lastLine = _b.line, lastLineChar = _b.character;
+            var lastLineInFile = ts.getLineAndCharacterOfPosition(file, file.text.length).line;
+            var relativeFileName = getRelativeFileName(file.fileName, host);
+            var hasMoreThanFiveLines = (lastLine - firstLine) >= 4;
+            var gutterWidth = (lastLine + 1 + "").length;
+            if (hasMoreThanFiveLines) {
+                gutterWidth = Math.max(ellipsis.length, gutterWidth);
+            }
+            output += ts.sys.newLine;
+            for (var i = firstLine; i <= lastLine; i++) {
+                if (hasMoreThanFiveLines && firstLine + 1 < i && i < lastLine - 1) {
+                    output += formatAndReset(padLeft(ellipsis, gutterWidth), gutterStyleSequence) + gutterSeparator + ts.sys.newLine;
+                    i = lastLine - 1;
+                }
+                var lineStart = ts.getPositionOfLineAndCharacter(file, i, 0);
+                var lineEnd = i < lastLineInFile ? ts.getPositionOfLineAndCharacter(file, i + 1, 0) : file.text.length;
+                var lineContent = file.text.slice(lineStart, lineEnd);
+                lineContent = lineContent.replace(/\s+$/g, "");
+                lineContent = lineContent.replace("\t", " ");
+                output += formatAndReset(padLeft(i + 1 + "", gutterWidth), gutterStyleSequence) + gutterSeparator;
+                output += lineContent + ts.sys.newLine;
+                output += formatAndReset(padLeft("", gutterWidth), gutterStyleSequence) + gutterSeparator;
+                output += redForegroundEscapeSequence;
+                if (i === firstLine) {
+                    var lastCharForLine = i === lastLine ? lastLineChar : undefined;
+                    output += lineContent.slice(0, firstLineChar).replace(/\S/g, " ");
+                    output += lineContent.slice(firstLineChar, lastCharForLine).replace(/./g, "~");
+                }
+                else if (i === lastLine) {
+                    output += lineContent.slice(0, lastLineChar).replace(/./g, "~");
+                }
+                else {
+                    output += lineContent.replace(/./g, "~");
+                }
+                output += resetEscapeSequence;
+                output += ts.sys.newLine;
+            }
+            output += ts.sys.newLine;
+            output += relativeFileName + "(" + (firstLine + 1) + "," + (firstLineChar + 1) + "): ";
+        }
+        var categoryColor = categoryFormatMap[diagnostic.category];
+        var category = ts.DiagnosticCategory[diagnostic.category].toLowerCase();
+        output += formatAndReset(category, categoryColor) + " TS" + diagnostic.code + ": " + ts.flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine);
+        output += ts.sys.newLine + ts.sys.newLine;
+        ts.sys.write(output);
+    }
+    function reportWatchDiagnostic(diagnostic) {
+        var output = new Date().toLocaleTimeString() + " - ";
+        if (diagnostic.file) {
+            var loc = ts.getLineAndCharacterOfPosition(diagnostic.file, diagnostic.start);
+            output += diagnostic.file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + "): ";
+        }
+        output += "" + ts.flattenDiagnosticMessageText(diagnostic.messageText, ts.sys.newLine) + ts.sys.newLine;
+        ts.sys.write(output);
+    }
+    function padLeft(s, length) {
+        while (s.length < length) {
+            s = " " + s;
+        }
+        return s;
+    }
+    function padRight(s, length) {
+        while (s.length < length) {
+            s = s + " ";
+        }
+        return s;
+    }
+    function reportStatisticalValue(name, value) {
+        ts.sys.write(padRight(name + ":", 12) + padLeft(value.toString(), 10) + ts.sys.newLine);
+    }
+    function reportCountStatistic(name, count) {
+        reportStatisticalValue(name, "" + count);
+    }
+    function reportTimeStatistic(name, time) {
+        reportStatisticalValue(name, (time / 1000).toFixed(2) + "s");
+    }
+    function isJSONSupported() {
+        return typeof JSON === "object" && typeof JSON.parse === "function";
+    }
+    function executeCommandLine(args) {
+        var commandLine = ts.parseCommandLine(args);
+        var configFileName;
+        var cachedConfigFileText;
+        var configFileWatcher;
+        var directoryWatcher;
+        var cachedProgram;
+        var rootFileNames;
+        var compilerOptions;
+        var compilerHost;
+        var hostGetSourceFile;
+        var timerHandleForRecompilation;
+        var timerHandleForDirectoryChanges;
+        var cachedExistingFiles;
+        var hostFileExists;
+        if (commandLine.options.locale) {
+            if (!isJSONSupported()) {
+                reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_current_host_does_not_support_the_0_option, "--locale"), undefined);
+                return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
+            }
+            validateLocaleAndSetLanguage(commandLine.options.locale, commandLine.errors);
+        }
+        if (commandLine.errors.length > 0) {
+            reportDiagnostics(commandLine.errors, compilerHost);
+            return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
+        }
+        if (commandLine.options.init) {
+            writeConfigFile(commandLine.options, commandLine.fileNames);
+            return ts.sys.exit(ts.ExitStatus.Success);
+        }
+        if (commandLine.options.version) {
+            printVersion();
+            return ts.sys.exit(ts.ExitStatus.Success);
+        }
+        if (commandLine.options.help) {
+            printVersion();
+            printHelp();
+            return ts.sys.exit(ts.ExitStatus.Success);
+        }
+        if (commandLine.options.project) {
+            if (!isJSONSupported()) {
+                reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_current_host_does_not_support_the_0_option, "--project"), undefined);
+                return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
+            }
+            if (commandLine.fileNames.length !== 0) {
+                reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.Option_project_cannot_be_mixed_with_source_files_on_a_command_line), undefined);
+                return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
+            }
+            var fileOrDirectory = ts.normalizePath(commandLine.options.project);
+            if (!fileOrDirectory || ts.sys.directoryExists(fileOrDirectory)) {
+                configFileName = ts.combinePaths(fileOrDirectory, "tsconfig.json");
+                if (!ts.sys.fileExists(configFileName)) {
+                    reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0, commandLine.options.project), undefined);
+                    return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
+                }
+            }
+            else {
+                configFileName = fileOrDirectory;
+                if (!ts.sys.fileExists(configFileName)) {
+                    reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_specified_path_does_not_exist_Colon_0, commandLine.options.project), undefined);
+                    return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
+                }
+            }
+        }
+        else if (commandLine.fileNames.length === 0 && isJSONSupported()) {
+            var searchPath = ts.normalizePath(ts.sys.getCurrentDirectory());
+            configFileName = ts.findConfigFile(searchPath, ts.sys.fileExists);
+        }
+        if (commandLine.fileNames.length === 0 && !configFileName) {
+            printVersion();
+            printHelp();
+            return ts.sys.exit(ts.ExitStatus.Success);
+        }
+        if (ts.isWatchSet(commandLine.options)) {
+            if (!ts.sys.watchFile) {
+                reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_current_host_does_not_support_the_0_option, "--watch"), undefined);
+                return ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
+            }
+            if (configFileName) {
+                configFileWatcher = ts.sys.watchFile(configFileName, configFileChanged);
+            }
+            if (ts.sys.watchDirectory && configFileName) {
+                var directory = ts.getDirectoryPath(configFileName);
+                directoryWatcher = ts.sys.watchDirectory(directory == "" ? "." : directory, watchedDirectoryChanged, true);
+            }
+        }
+        performCompilation();
+        function parseConfigFile() {
+            if (!cachedConfigFileText) {
+                try {
+                    cachedConfigFileText = ts.sys.readFile(configFileName);
+                }
+                catch (e) {
+                    var error = ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, configFileName, e.message);
+                    reportWatchDiagnostic(error);
+                    ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
+                    return;
+                }
+            }
+            if (!cachedConfigFileText) {
+                var error = ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, configFileName);
+                reportDiagnostics([error], undefined);
+                ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
+                return;
+            }
+            var result = ts.parseConfigFileTextToJson(configFileName, cachedConfigFileText);
+            var configObject = result.config;
+            if (!configObject) {
+                reportDiagnostics([result.error], undefined);
+                ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
+                return;
+            }
+            var configParseResult = ts.parseJsonConfigFileContent(configObject, ts.sys, ts.getNormalizedAbsolutePath(ts.getDirectoryPath(configFileName), ts.sys.getCurrentDirectory()), commandLine.options, configFileName);
+            if (configParseResult.errors.length > 0) {
+                reportDiagnostics(configParseResult.errors, undefined);
+                ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
+                return;
+            }
+            if (ts.isWatchSet(configParseResult.options)) {
+                if (!ts.sys.watchFile) {
+                    reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.The_current_host_does_not_support_the_0_option, "--watch"), undefined);
+                    ts.sys.exit(ts.ExitStatus.DiagnosticsPresent_OutputsSkipped);
+                }
+                if (!directoryWatcher && ts.sys.watchDirectory && configFileName) {
+                    var directory = ts.getDirectoryPath(configFileName);
+                    directoryWatcher = ts.sys.watchDirectory(directory == "" ? "." : directory, watchedDirectoryChanged, true);
+                }
+                ;
+            }
+            return configParseResult;
+        }
+        function performCompilation() {
+            if (!cachedProgram) {
+                if (configFileName) {
+                    var configParseResult = parseConfigFile();
+                    rootFileNames = configParseResult.fileNames;
+                    compilerOptions = configParseResult.options;
+                }
+                else {
+                    rootFileNames = commandLine.fileNames;
+                    compilerOptions = commandLine.options;
+                }
+                compilerHost = ts.createCompilerHost(compilerOptions);
+                hostGetSourceFile = compilerHost.getSourceFile;
+                compilerHost.getSourceFile = getSourceFile;
+                hostFileExists = compilerHost.fileExists;
+                compilerHost.fileExists = cachedFileExists;
+            }
+            if (compilerOptions.pretty) {
+                reportDiagnostic = reportDiagnosticWithColorAndContext;
+            }
+            cachedExistingFiles = {};
+            var compileResult = compile(rootFileNames, compilerOptions, compilerHost);
+            if (!ts.isWatchSet(compilerOptions)) {
+                return ts.sys.exit(compileResult.exitStatus);
+            }
+            setCachedProgram(compileResult.program);
+            reportWatchDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.Compilation_complete_Watching_for_file_changes));
+        }
+        function cachedFileExists(fileName) {
+            if (ts.hasProperty(cachedExistingFiles, fileName)) {
+                return cachedExistingFiles[fileName];
+            }
+            return cachedExistingFiles[fileName] = hostFileExists(fileName);
+        }
+        function getSourceFile(fileName, languageVersion, onError) {
+            if (cachedProgram) {
+                var sourceFile_1 = cachedProgram.getSourceFile(fileName);
+                if (sourceFile_1 && sourceFile_1.fileWatcher) {
+                    return sourceFile_1;
+                }
+            }
+            var sourceFile = hostGetSourceFile(fileName, languageVersion, onError);
+            if (sourceFile && ts.isWatchSet(compilerOptions) && ts.sys.watchFile) {
+                sourceFile.fileWatcher = ts.sys.watchFile(sourceFile.fileName, function (fileName, removed) { return sourceFileChanged(sourceFile, removed); });
+            }
+            return sourceFile;
+        }
+        function setCachedProgram(program) {
+            if (cachedProgram) {
+                var newSourceFiles_1 = program ? program.getSourceFiles() : undefined;
+                ts.forEach(cachedProgram.getSourceFiles(), function (sourceFile) {
+                    if (!(newSourceFiles_1 && ts.contains(newSourceFiles_1, sourceFile))) {
+                        if (sourceFile.fileWatcher) {
+                            sourceFile.fileWatcher.close();
+                            sourceFile.fileWatcher = undefined;
+                        }
+                    }
+                });
+            }
+            cachedProgram = program;
+        }
+        function sourceFileChanged(sourceFile, removed) {
+            sourceFile.fileWatcher.close();
+            sourceFile.fileWatcher = undefined;
+            if (removed) {
+                var index = rootFileNames.indexOf(sourceFile.fileName);
+                if (index >= 0) {
+                    rootFileNames.splice(index, 1);
+                }
+            }
+            startTimerForRecompilation();
+        }
+        function configFileChanged() {
+            setCachedProgram(undefined);
+            cachedConfigFileText = undefined;
+            startTimerForRecompilation();
+        }
+        function watchedDirectoryChanged(fileName) {
+            if (fileName && !ts.isSupportedSourceFileName(fileName, compilerOptions)) {
+                return;
+            }
+            startTimerForHandlingDirectoryChanges();
+        }
+        function startTimerForHandlingDirectoryChanges() {
+            if (timerHandleForDirectoryChanges) {
+                clearTimeout(timerHandleForDirectoryChanges);
+            }
+            timerHandleForDirectoryChanges = setTimeout(directoryChangeHandler, 250);
+        }
+        function directoryChangeHandler() {
+            var parsedCommandLine = parseConfigFile();
+            var newFileNames = ts.map(parsedCommandLine.fileNames, compilerHost.getCanonicalFileName);
+            var canonicalRootFileNames = ts.map(rootFileNames, compilerHost.getCanonicalFileName);
+            if (!ts.arrayIsEqualTo(newFileNames && newFileNames.sort(), canonicalRootFileNames && canonicalRootFileNames.sort())) {
+                setCachedProgram(undefined);
+                startTimerForRecompilation();
+            }
+        }
+        function startTimerForRecompilation() {
+            if (timerHandleForRecompilation) {
+                clearTimeout(timerHandleForRecompilation);
+            }
+            timerHandleForRecompilation = setTimeout(recompile, 250);
+        }
+        function recompile() {
+            timerHandleForRecompilation = undefined;
+            reportWatchDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.File_change_detected_Starting_incremental_compilation));
+            performCompilation();
+        }
+    }
+    ts.executeCommandLine = executeCommandLine;
+    function compile(fileNames, compilerOptions, compilerHost) {
+        ts.ioReadTime = 0;
+        ts.ioWriteTime = 0;
+        ts.programTime = 0;
+        ts.bindTime = 0;
+        ts.checkTime = 0;
+        ts.emitTime = 0;
+        var program = ts.createProgram(fileNames, compilerOptions, compilerHost);
+        var exitStatus = compileProgram();
+        if (compilerOptions.listFiles) {
+            ts.forEach(program.getSourceFiles(), function (file) {
+                ts.sys.write(file.fileName + ts.sys.newLine);
+            });
+        }
+        if (compilerOptions.diagnostics) {
+            var memoryUsed = ts.sys.getMemoryUsage ? ts.sys.getMemoryUsage() : -1;
+            reportCountStatistic("Files", program.getSourceFiles().length);
+            reportCountStatistic("Lines", countLines(program));
+            reportCountStatistic("Nodes", program.getNodeCount());
+            reportCountStatistic("Identifiers", program.getIdentifierCount());
+            reportCountStatistic("Symbols", program.getSymbolCount());
+            reportCountStatistic("Types", program.getTypeCount());
+            if (memoryUsed >= 0) {
+                reportStatisticalValue("Memory used", Math.round(memoryUsed / 1000) + "K");
+            }
+            reportTimeStatistic("I/O read", ts.ioReadTime);
+            reportTimeStatistic("I/O write", ts.ioWriteTime);
+            reportTimeStatistic("Parse time", ts.programTime);
+            reportTimeStatistic("Bind time", ts.bindTime);
+            reportTimeStatistic("Check time", ts.checkTime);
+            reportTimeStatistic("Emit time", ts.emitTime);
+            reportTimeStatistic("Total time", ts.programTime + ts.bindTime + ts.checkTime + ts.emitTime);
+        }
+        return { program: program, exitStatus: exitStatus };
+        function compileProgram() {
+            var diagnostics;
+            diagnostics = program.getSyntacticDiagnostics();
+            if (diagnostics.length === 0) {
+                diagnostics = program.getOptionsDiagnostics().concat(program.getGlobalDiagnostics());
+                if (diagnostics.length === 0) {
+                    diagnostics = program.getSemanticDiagnostics();
+                }
+            }
+            var emitOutput = program.emit();
+            diagnostics = diagnostics.concat(emitOutput.diagnostics);
+            reportDiagnostics(ts.sortAndDeduplicateDiagnostics(diagnostics), compilerHost);
+            reportEmittedFiles(emitOutput.emittedFiles, compilerHost);
+            if (emitOutput.emitSkipped && diagnostics.length > 0) {
+                return ts.ExitStatus.DiagnosticsPresent_OutputsSkipped;
+            }
+            else if (diagnostics.length > 0) {
+                return ts.ExitStatus.DiagnosticsPresent_OutputsGenerated;
+            }
+            return ts.ExitStatus.Success;
+        }
+    }
+    function printVersion() {
+        ts.sys.write(getDiagnosticText(ts.Diagnostics.Version_0, ts.version) + ts.sys.newLine);
+    }
+    function printHelp() {
+        var output = "";
+        var syntaxLength = getDiagnosticText(ts.Diagnostics.Syntax_Colon_0, "").length;
+        var examplesLength = getDiagnosticText(ts.Diagnostics.Examples_Colon_0, "").length;
+        var marginLength = Math.max(syntaxLength, examplesLength);
+        var syntax = makePadding(marginLength - syntaxLength);
+        syntax += "tsc [" + getDiagnosticText(ts.Diagnostics.options) + "] [" + getDiagnosticText(ts.Diagnostics.file) + " ...]";
+        output += getDiagnosticText(ts.Diagnostics.Syntax_Colon_0, syntax);
+        output += ts.sys.newLine + ts.sys.newLine;
+        var padding = makePadding(marginLength);
+        output += getDiagnosticText(ts.Diagnostics.Examples_Colon_0, makePadding(marginLength - examplesLength) + "tsc hello.ts") + ts.sys.newLine;
+        output += padding + "tsc --out file.js file.ts" + ts.sys.newLine;
+        output += padding + "tsc @args.txt" + ts.sys.newLine;
+        output += ts.sys.newLine;
+        output += getDiagnosticText(ts.Diagnostics.Options_Colon) + ts.sys.newLine;
+        var optsList = ts.filter(ts.optionDeclarations.slice(), function (v) { return !v.experimental; });
+        optsList.sort(function (a, b) { return ts.compareValues(a.name.toLowerCase(), b.name.toLowerCase()); });
+        marginLength = 0;
+        var usageColumn = [];
+        var descriptionColumn = [];
+        var optionsDescriptionMap = {};
+        var _loop_2 = function(i) {
+            var option = optsList[i];
+            if (!option.description) {
+                return "continue";
+            }
+            var usageText_1 = " ";
+            if (option.shortName) {
+                usageText_1 += "-" + option.shortName;
+                usageText_1 += getParamType(option);
+                usageText_1 += ", ";
+            }
+            usageText_1 += "--" + option.name;
+            usageText_1 += getParamType(option);
+            usageColumn.push(usageText_1);
+            var description = void 0;
+            if (option.name === "lib") {
+                description = getDiagnosticText(option.description);
+                var options_1 = [];
+                var element = option.element;
+                ts.forEachKey(element.type, function (key) {
+                    options_1.push("'" + key + "'");
+                });
+                optionsDescriptionMap[description] = options_1;
+            }
+            else {
+                description = getDiagnosticText(option.description);
+            }
+            descriptionColumn.push(description);
+            marginLength = Math.max(usageText_1.length, marginLength);
+        };
+        for (var i = 0; i < optsList.length; i++) {
+            _loop_2(i);
+        }
+        var usageText = " @<" + getDiagnosticText(ts.Diagnostics.file) + ">";
+        usageColumn.push(usageText);
+        descriptionColumn.push(getDiagnosticText(ts.Diagnostics.Insert_command_line_options_and_files_from_a_file));
+        marginLength = Math.max(usageText.length, marginLength);
+        for (var i = 0; i < usageColumn.length; i++) {
+            var usage = usageColumn[i];
+            var description = descriptionColumn[i];
+            var kindsList = optionsDescriptionMap[description];
+            output += usage + makePadding(marginLength - usage.length + 2) + description + ts.sys.newLine;
+            if (kindsList) {
+                output += makePadding(marginLength + 4);
+                for (var _i = 0, kindsList_1 = kindsList; _i < kindsList_1.length; _i++) {
+                    var kind = kindsList_1[_i];
+                    output += kind + " ";
+                }
+                output += ts.sys.newLine;
+            }
+        }
+        ts.sys.write(output);
+        return;
+        function getParamType(option) {
+            if (option.paramType !== undefined) {
+                return " " + getDiagnosticText(option.paramType);
+            }
+            return "";
+        }
+        function makePadding(paddingLength) {
+            return Array(paddingLength + 1).join(" ");
+        }
+    }
+    function writeConfigFile(options, fileNames) {
+        var currentDirectory = ts.sys.getCurrentDirectory();
+        var file = ts.normalizePath(ts.combinePaths(currentDirectory, "tsconfig.json"));
+        if (ts.sys.fileExists(file)) {
+            reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.A_tsconfig_json_file_is_already_defined_at_Colon_0, file), undefined);
+        }
+        else {
+            var compilerOptions = ts.extend(options, ts.defaultInitCompilerOptions);
+            var configurations = {
+                compilerOptions: serializeCompilerOptions(compilerOptions)
+            };
+            if (fileNames && fileNames.length) {
+                configurations.files = fileNames;
+            }
+            else {
+                configurations.exclude = ["node_modules"];
+                if (compilerOptions.outDir) {
+                    configurations.exclude.push(compilerOptions.outDir);
+                }
+            }
+            ts.sys.writeFile(file, JSON.stringify(configurations, undefined, 4));
+            reportDiagnostic(ts.createCompilerDiagnostic(ts.Diagnostics.Successfully_created_a_tsconfig_json_file), undefined);
+        }
+        return;
+        function serializeCompilerOptions(options) {
+            var result = {};
+            var optionsNameMap = ts.getOptionNameMap().optionNameMap;
+            for (var name_35 in options) {
+                if (ts.hasProperty(options, name_35)) {
+                    var value = options[name_35];
+                    switch (name_35) {
+                        case "init":
+                        case "watch":
+                        case "version":
+                        case "help":
+                        case "project":
+                            break;
+                        default:
+                            var optionDefinition = optionsNameMap[name_35.toLowerCase()];
+                            if (optionDefinition) {
+                                if (typeof optionDefinition.type === "string") {
+                                    result[name_35] = value;
+                                }
+                                else {
+                                    var typeMap = optionDefinition.type;
+                                    for (var key in typeMap) {
+                                        if (ts.hasProperty(typeMap, key)) {
+                                            if (typeMap[key] === value)
+                                                result[name_35] = key;
+                                        }
+                                    }
+                                }
+                            }
+                            break;
+                    }
+                }
+            }
+            return result;
+        }
+    }
+    var _a;
+})(ts || (ts = {}));
+ts.executeCommandLine(ts.sys.args);
diff --git a/lib/tsserver.js b/lib/tsserver.js
index ff03ffc0b2c..6565ba47042 100644
--- a/lib/tsserver.js
+++ b/lib/tsserver.js
@@ -13,51854 +13,52454 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
-var __extends = (this && this.__extends) || function (d, b) {
-    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
-    function __() { this.constructor = d; }
-    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
-};
-var ts;
-(function (ts) {
-    var OperationCanceledException = (function () {
-        function OperationCanceledException() {
-        }
-        return OperationCanceledException;
-    }());
-    ts.OperationCanceledException = OperationCanceledException;
-    (function (ExitStatus) {
-        ExitStatus[ExitStatus["Success"] = 0] = "Success";
-        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
-        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
-    })(ts.ExitStatus || (ts.ExitStatus = {}));
-    var ExitStatus = ts.ExitStatus;
-    (function (TypeReferenceSerializationKind) {
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithConstructSignatureAndValue"] = 1] = "TypeWithConstructSignatureAndValue";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["VoidType"] = 2] = "VoidType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["NumberLikeType"] = 3] = "NumberLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["StringLikeType"] = 4] = "StringLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["BooleanType"] = 5] = "BooleanType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ArrayLikeType"] = 6] = "ArrayLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ESSymbolType"] = 7] = "ESSymbolType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 8] = "TypeWithCallSignature";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 9] = "ObjectType";
-    })(ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
-    var TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind;
-    (function (DiagnosticCategory) {
-        DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
-        DiagnosticCategory[DiagnosticCategory["Error"] = 1] = "Error";
-        DiagnosticCategory[DiagnosticCategory["Message"] = 2] = "Message";
-    })(ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
-    var DiagnosticCategory = ts.DiagnosticCategory;
-    (function (ModuleResolutionKind) {
-        ModuleResolutionKind[ModuleResolutionKind["Classic"] = 1] = "Classic";
-        ModuleResolutionKind[ModuleResolutionKind["NodeJs"] = 2] = "NodeJs";
-    })(ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
-    var ModuleResolutionKind = ts.ModuleResolutionKind;
-    (function (ModuleKind) {
-        ModuleKind[ModuleKind["None"] = 0] = "None";
-        ModuleKind[ModuleKind["CommonJS"] = 1] = "CommonJS";
-        ModuleKind[ModuleKind["AMD"] = 2] = "AMD";
-        ModuleKind[ModuleKind["UMD"] = 3] = "UMD";
-        ModuleKind[ModuleKind["System"] = 4] = "System";
-        ModuleKind[ModuleKind["ES6"] = 5] = "ES6";
-        ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
-    })(ts.ModuleKind || (ts.ModuleKind = {}));
-    var ModuleKind = ts.ModuleKind;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function createFileMap(keyMapper) {
-        var files = {};
-        return {
-            get: get,
-            set: set,
-            contains: contains,
-            remove: remove,
-            forEachValue: forEachValueInMap,
-            clear: clear
-        };
-        function forEachValueInMap(f) {
-            for (var key in files) {
-                f(key, files[key]);
-            }
-        }
-        function get(path) {
-            return files[toKey(path)];
-        }
-        function set(path, value) {
-            files[toKey(path)] = value;
-        }
-        function contains(path) {
-            return hasProperty(files, toKey(path));
-        }
-        function remove(path) {
-            var key = toKey(path);
-            delete files[key];
-        }
-        function clear() {
-            files = {};
-        }
-        function toKey(path) {
-            return keyMapper ? keyMapper(path) : path;
-        }
-    }
-    ts.createFileMap = createFileMap;
-    function toPath(fileName, basePath, getCanonicalFileName) {
-        var nonCanonicalizedPath = isRootedDiskPath(fileName)
-            ? normalizePath(fileName)
-            : getNormalizedAbsolutePath(fileName, basePath);
-        return getCanonicalFileName(nonCanonicalizedPath);
-    }
-    ts.toPath = toPath;
-    function forEach(array, callback) {
-        if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
-                var result = callback(array[i], i);
-                if (result) {
-                    return result;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.forEach = forEach;
-    function contains(array, value, areEqual) {
-        if (array) {
-            for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
-                var v = array_1[_i];
-                if (areEqual ? areEqual(v, value) : v === value) {
-                    return true;
-                }
-            }
-        }
-        return false;
-    }
-    ts.contains = contains;
-    function indexOf(array, value) {
-        if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
-                if (array[i] === value) {
-                    return i;
-                }
-            }
-        }
-        return -1;
-    }
-    ts.indexOf = indexOf;
-    function countWhere(array, predicate) {
-        var count = 0;
-        if (array) {
-            for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
-                var v = array_2[_i];
-                if (predicate(v)) {
-                    count++;
-                }
-            }
-        }
-        return count;
-    }
-    ts.countWhere = countWhere;
-    function filter(array, f) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_3 = array; _i < array_3.length; _i++) {
-                var item = array_3[_i];
-                if (f(item)) {
-                    result.push(item);
-                }
-            }
-        }
-        return result;
-    }
-    ts.filter = filter;
-    function map(array, f) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_4 = array; _i < array_4.length; _i++) {
-                var v = array_4[_i];
-                result.push(f(v));
-            }
-        }
-        return result;
-    }
-    ts.map = map;
-    function concatenate(array1, array2) {
-        if (!array2 || !array2.length)
-            return array1;
-        if (!array1 || !array1.length)
-            return array2;
-        return array1.concat(array2);
-    }
-    ts.concatenate = concatenate;
-    function deduplicate(array, areEqual) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
-                var item = array_5[_i];
-                if (!contains(result, item, areEqual)) {
-                    result.push(item);
-                }
-            }
-        }
-        return result;
-    }
-    ts.deduplicate = deduplicate;
-    function sum(array, prop) {
-        var result = 0;
-        for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
-            var v = array_6[_i];
-            result += v[prop];
-        }
-        return result;
-    }
-    ts.sum = sum;
-    function addRange(to, from) {
-        if (to && from) {
-            for (var _i = 0, from_1 = from; _i < from_1.length; _i++) {
-                var v = from_1[_i];
-                to.push(v);
-            }
-        }
-    }
-    ts.addRange = addRange;
-    function rangeEquals(array1, array2, pos, end) {
-        while (pos < end) {
-            if (array1[pos] !== array2[pos]) {
-                return false;
-            }
-            pos++;
-        }
-        return true;
-    }
-    ts.rangeEquals = rangeEquals;
-    function lastOrUndefined(array) {
-        if (array.length === 0) {
-            return undefined;
-        }
-        return array[array.length - 1];
-    }
-    ts.lastOrUndefined = lastOrUndefined;
-    function binarySearch(array, value) {
-        var low = 0;
-        var high = array.length - 1;
-        while (low <= high) {
-            var middle = low + ((high - low) >> 1);
-            var midValue = array[middle];
-            if (midValue === value) {
-                return middle;
-            }
-            else if (midValue > value) {
-                high = middle - 1;
-            }
-            else {
-                low = middle + 1;
-            }
-        }
-        return ~low;
-    }
-    ts.binarySearch = binarySearch;
-    function reduceLeft(array, f, initial) {
-        if (array) {
-            var count = array.length;
-            if (count > 0) {
-                var pos = 0;
-                var result = void 0;
-                if (arguments.length <= 2) {
-                    result = array[pos];
-                    pos++;
-                }
-                else {
-                    result = initial;
-                }
-                while (pos < count) {
-                    result = f(result, array[pos]);
-                    pos++;
-                }
-                return result;
-            }
-        }
-        return initial;
-    }
-    ts.reduceLeft = reduceLeft;
-    function reduceRight(array, f, initial) {
-        if (array) {
-            var pos = array.length - 1;
-            if (pos >= 0) {
-                var result = void 0;
-                if (arguments.length <= 2) {
-                    result = array[pos];
-                    pos--;
-                }
-                else {
-                    result = initial;
-                }
-                while (pos >= 0) {
-                    result = f(result, array[pos]);
-                    pos--;
-                }
-                return result;
-            }
-        }
-        return initial;
-    }
-    ts.reduceRight = reduceRight;
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-    function hasProperty(map, key) {
-        return hasOwnProperty.call(map, key);
-    }
-    ts.hasProperty = hasProperty;
-    function getKeys(map) {
-        var keys = [];
-        for (var key in map) {
-            keys.push(key);
-        }
-        return keys;
-    }
-    ts.getKeys = getKeys;
-    function getProperty(map, key) {
-        return hasOwnProperty.call(map, key) ? map[key] : undefined;
-    }
-    ts.getProperty = getProperty;
-    function isEmpty(map) {
-        for (var id in map) {
-            if (hasProperty(map, id)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.isEmpty = isEmpty;
-    function clone(object) {
-        var result = {};
-        for (var id in object) {
-            result[id] = object[id];
-        }
-        return result;
-    }
-    ts.clone = clone;
-    function extend(first, second) {
-        var result = {};
-        for (var id in first) {
-            result[id] = first[id];
-        }
-        for (var id in second) {
-            if (!hasProperty(result, id)) {
-                result[id] = second[id];
-            }
-        }
-        return result;
-    }
-    ts.extend = extend;
-    function forEachValue(map, callback) {
-        var result;
-        for (var id in map) {
-            if (result = callback(map[id]))
-                break;
-        }
-        return result;
-    }
-    ts.forEachValue = forEachValue;
-    function forEachKey(map, callback) {
-        var result;
-        for (var id in map) {
-            if (result = callback(id))
-                break;
-        }
-        return result;
-    }
-    ts.forEachKey = forEachKey;
-    function lookUp(map, key) {
-        return hasProperty(map, key) ? map[key] : undefined;
-    }
-    ts.lookUp = lookUp;
-    function copyMap(source, target) {
-        for (var p in source) {
-            target[p] = source[p];
-        }
-    }
-    ts.copyMap = copyMap;
-    function arrayToMap(array, makeKey) {
-        var result = {};
-        forEach(array, function (value) {
-            result[makeKey(value)] = value;
-        });
-        return result;
-    }
-    ts.arrayToMap = arrayToMap;
-    function reduceProperties(map, callback, initial) {
-        var result = initial;
-        if (map) {
-            for (var key in map) {
-                if (hasProperty(map, key)) {
-                    result = callback(result, map[key], String(key));
-                }
-            }
-        }
-        return result;
-    }
-    ts.reduceProperties = reduceProperties;
-    function isArray(value) {
-        return Array.isArray ? Array.isArray(value) : value instanceof Array;
-    }
-    ts.isArray = isArray;
-    function memoize(callback) {
-        var value;
-        return function () {
-            if (callback) {
-                value = callback();
-                callback = undefined;
-            }
-            return value;
-        };
-    }
-    ts.memoize = memoize;
-    function formatStringFromArgs(text, args, baseIndex) {
-        baseIndex = baseIndex || 0;
-        return text.replace(/{(\d+)}/g, function (match, index) { return args[+index + baseIndex]; });
-    }
-    ts.localizedDiagnosticMessages = undefined;
-    function getLocaleSpecificMessage(message) {
-        return ts.localizedDiagnosticMessages && ts.localizedDiagnosticMessages[message.key]
-            ? ts.localizedDiagnosticMessages[message.key]
-            : message.message;
-    }
-    ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
-    function createFileDiagnostic(file, start, length, message) {
-        var end = start + length;
-        Debug.assert(start >= 0, "start must be non-negative, is " + start);
-        Debug.assert(length >= 0, "length must be non-negative, is " + length);
-        if (file) {
-            Debug.assert(start <= file.text.length, "start must be within the bounds of the file. " + start + " > " + file.text.length);
-            Debug.assert(end <= file.text.length, "end must be the bounds of the file. " + end + " > " + file.text.length);
-        }
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 4) {
-            text = formatStringFromArgs(text, arguments, 4);
-        }
-        return {
-            file: file,
-            start: start,
-            length: length,
-            messageText: text,
-            category: message.category,
-            code: message.code
-        };
-    }
-    ts.createFileDiagnostic = createFileDiagnostic;
-    function formatMessage(dummy, message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 2) {
-            text = formatStringFromArgs(text, arguments, 2);
-        }
-        return text;
-    }
-    ts.formatMessage = formatMessage;
-    function createCompilerDiagnostic(message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 1) {
-            text = formatStringFromArgs(text, arguments, 1);
-        }
-        return {
-            file: undefined,
-            start: undefined,
-            length: undefined,
-            messageText: text,
-            category: message.category,
-            code: message.code
-        };
-    }
-    ts.createCompilerDiagnostic = createCompilerDiagnostic;
-    function chainDiagnosticMessages(details, message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 2) {
-            text = formatStringFromArgs(text, arguments, 2);
-        }
-        return {
-            messageText: text,
-            category: message.category,
-            code: message.code,
-            next: details
-        };
-    }
-    ts.chainDiagnosticMessages = chainDiagnosticMessages;
-    function concatenateDiagnosticMessageChains(headChain, tailChain) {
-        var lastChain = headChain;
-        while (lastChain.next) {
-            lastChain = lastChain.next;
-        }
-        lastChain.next = tailChain;
-        return headChain;
-    }
-    ts.concatenateDiagnosticMessageChains = concatenateDiagnosticMessageChains;
-    function compareValues(a, b) {
-        if (a === b)
-            return 0;
-        if (a === undefined)
-            return -1;
-        if (b === undefined)
-            return 1;
-        return a < b ? -1 : 1;
-    }
-    ts.compareValues = compareValues;
-    function getDiagnosticFileName(diagnostic) {
-        return diagnostic.file ? diagnostic.file.fileName : undefined;
-    }
-    function compareDiagnostics(d1, d2) {
-        return compareValues(getDiagnosticFileName(d1), getDiagnosticFileName(d2)) ||
-            compareValues(d1.start, d2.start) ||
-            compareValues(d1.length, d2.length) ||
-            compareValues(d1.code, d2.code) ||
-            compareMessageText(d1.messageText, d2.messageText) ||
-            0;
-    }
-    ts.compareDiagnostics = compareDiagnostics;
-    function compareMessageText(text1, text2) {
-        while (text1 && text2) {
-            var string1 = typeof text1 === "string" ? text1 : text1.messageText;
-            var string2 = typeof text2 === "string" ? text2 : text2.messageText;
-            var res = compareValues(string1, string2);
-            if (res) {
-                return res;
-            }
-            text1 = typeof text1 === "string" ? undefined : text1.next;
-            text2 = typeof text2 === "string" ? undefined : text2.next;
-        }
-        if (!text1 && !text2) {
-            return 0;
-        }
-        return text1 ? 1 : -1;
-    }
-    function sortAndDeduplicateDiagnostics(diagnostics) {
-        return deduplicateSortedDiagnostics(diagnostics.sort(compareDiagnostics));
-    }
-    ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
-    function deduplicateSortedDiagnostics(diagnostics) {
-        if (diagnostics.length < 2) {
-            return diagnostics;
-        }
-        var newDiagnostics = [diagnostics[0]];
-        var previousDiagnostic = diagnostics[0];
-        for (var i = 1; i < diagnostics.length; i++) {
-            var currentDiagnostic = diagnostics[i];
-            var isDupe = compareDiagnostics(currentDiagnostic, previousDiagnostic) === 0;
-            if (!isDupe) {
-                newDiagnostics.push(currentDiagnostic);
-                previousDiagnostic = currentDiagnostic;
-            }
-        }
-        return newDiagnostics;
-    }
-    ts.deduplicateSortedDiagnostics = deduplicateSortedDiagnostics;
-    function normalizeSlashes(path) {
-        return path.replace(/\\/g, "/");
-    }
-    ts.normalizeSlashes = normalizeSlashes;
-    function getRootLength(path) {
-        if (path.charCodeAt(0) === 47) {
-            if (path.charCodeAt(1) !== 47)
-                return 1;
-            var p1 = path.indexOf("/", 2);
-            if (p1 < 0)
-                return 2;
-            var p2 = path.indexOf("/", p1 + 1);
-            if (p2 < 0)
-                return p1 + 1;
-            return p2 + 1;
-        }
-        if (path.charCodeAt(1) === 58) {
-            if (path.charCodeAt(2) === 47)
-                return 3;
-            return 2;
-        }
-        if (path.lastIndexOf("file:///", 0) === 0) {
-            return "file:///".length;
-        }
-        var idx = path.indexOf("://");
-        if (idx !== -1) {
-            return idx + "://".length;
-        }
-        return 0;
-    }
-    ts.getRootLength = getRootLength;
-    ts.directorySeparator = "/";
-    function getNormalizedParts(normalizedSlashedPath, rootLength) {
-        var parts = normalizedSlashedPath.substr(rootLength).split(ts.directorySeparator);
-        var normalized = [];
-        for (var _i = 0, parts_1 = parts; _i < parts_1.length; _i++) {
-            var part = parts_1[_i];
-            if (part !== ".") {
-                if (part === ".." && normalized.length > 0 && lastOrUndefined(normalized) !== "..") {
-                    normalized.pop();
-                }
-                else {
-                    if (part) {
-                        normalized.push(part);
-                    }
-                }
-            }
-        }
-        return normalized;
-    }
-    function normalizePath(path) {
-        path = normalizeSlashes(path);
-        var rootLength = getRootLength(path);
-        var normalized = getNormalizedParts(path, rootLength);
-        return path.substr(0, rootLength) + normalized.join(ts.directorySeparator);
-    }
-    ts.normalizePath = normalizePath;
-    function getDirectoryPath(path) {
-        return path.substr(0, Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator)));
-    }
-    ts.getDirectoryPath = getDirectoryPath;
-    function isUrl(path) {
-        return path && !isRootedDiskPath(path) && path.indexOf("://") !== -1;
-    }
-    ts.isUrl = isUrl;
-    function isRootedDiskPath(path) {
-        return getRootLength(path) !== 0;
-    }
-    ts.isRootedDiskPath = isRootedDiskPath;
-    function normalizedPathComponents(path, rootLength) {
-        var normalizedParts = getNormalizedParts(path, rootLength);
-        return [path.substr(0, rootLength)].concat(normalizedParts);
-    }
-    function getNormalizedPathComponents(path, currentDirectory) {
-        path = normalizeSlashes(path);
-        var rootLength = getRootLength(path);
-        if (rootLength === 0) {
-            path = combinePaths(normalizeSlashes(currentDirectory), path);
-            rootLength = getRootLength(path);
-        }
-        return normalizedPathComponents(path, rootLength);
-    }
-    ts.getNormalizedPathComponents = getNormalizedPathComponents;
-    function getNormalizedAbsolutePath(fileName, currentDirectory) {
-        return getNormalizedPathFromPathComponents(getNormalizedPathComponents(fileName, currentDirectory));
-    }
-    ts.getNormalizedAbsolutePath = getNormalizedAbsolutePath;
-    function getNormalizedPathFromPathComponents(pathComponents) {
-        if (pathComponents && pathComponents.length) {
-            return pathComponents[0] + pathComponents.slice(1).join(ts.directorySeparator);
-        }
-    }
-    ts.getNormalizedPathFromPathComponents = getNormalizedPathFromPathComponents;
-    function getNormalizedPathComponentsOfUrl(url) {
-        var urlLength = url.length;
-        var rootLength = url.indexOf("://") + "://".length;
-        while (rootLength < urlLength) {
-            if (url.charCodeAt(rootLength) === 47) {
-                rootLength++;
-            }
-            else {
-                break;
-            }
-        }
-        if (rootLength === urlLength) {
-            return [url];
-        }
-        var indexOfNextSlash = url.indexOf(ts.directorySeparator, rootLength);
-        if (indexOfNextSlash !== -1) {
-            rootLength = indexOfNextSlash + 1;
-            return normalizedPathComponents(url, rootLength);
-        }
-        else {
-            return [url + ts.directorySeparator];
-        }
-    }
-    function getNormalizedPathOrUrlComponents(pathOrUrl, currentDirectory) {
-        if (isUrl(pathOrUrl)) {
-            return getNormalizedPathComponentsOfUrl(pathOrUrl);
-        }
-        else {
-            return getNormalizedPathComponents(pathOrUrl, currentDirectory);
-        }
-    }
-    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
-        var pathComponents = getNormalizedPathOrUrlComponents(relativeOrAbsolutePath, currentDirectory);
-        var directoryComponents = getNormalizedPathOrUrlComponents(directoryPathOrUrl, currentDirectory);
-        if (directoryComponents.length > 1 && lastOrUndefined(directoryComponents) === "") {
-            directoryComponents.length--;
-        }
-        var joinStartIndex;
-        for (joinStartIndex = 0; joinStartIndex < pathComponents.length && joinStartIndex < directoryComponents.length; joinStartIndex++) {
-            if (getCanonicalFileName(directoryComponents[joinStartIndex]) !== getCanonicalFileName(pathComponents[joinStartIndex])) {
-                break;
-            }
-        }
-        if (joinStartIndex) {
-            var relativePath = "";
-            var relativePathComponents = pathComponents.slice(joinStartIndex, pathComponents.length);
-            for (; joinStartIndex < directoryComponents.length; joinStartIndex++) {
-                if (directoryComponents[joinStartIndex] !== "") {
-                    relativePath = relativePath + ".." + ts.directorySeparator;
-                }
-            }
-            return relativePath + relativePathComponents.join(ts.directorySeparator);
-        }
-        var absolutePath = getNormalizedPathFromPathComponents(pathComponents);
-        if (isAbsolutePathAnUrl && isRootedDiskPath(absolutePath)) {
-            absolutePath = "file:///" + absolutePath;
-        }
-        return absolutePath;
-    }
-    ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
-    function getBaseFileName(path) {
-        if (path === undefined) {
-            return undefined;
-        }
-        var i = path.lastIndexOf(ts.directorySeparator);
-        return i < 0 ? path : path.substring(i + 1);
-    }
-    ts.getBaseFileName = getBaseFileName;
-    function combinePaths(path1, path2) {
-        if (!(path1 && path1.length))
-            return path2;
-        if (!(path2 && path2.length))
-            return path1;
-        if (getRootLength(path2) !== 0)
-            return path2;
-        if (path1.charAt(path1.length - 1) === ts.directorySeparator)
-            return path1 + path2;
-        return path1 + ts.directorySeparator + path2;
-    }
-    ts.combinePaths = combinePaths;
-    function fileExtensionIs(path, extension) {
-        var pathLen = path.length;
-        var extLen = extension.length;
-        return pathLen > extLen && path.substr(pathLen - extLen, extLen) === extension;
-    }
-    ts.fileExtensionIs = fileExtensionIs;
-    function ensureScriptKind(fileName, scriptKind) {
-        return (scriptKind || getScriptKindFromFileName(fileName)) || 3;
-    }
-    ts.ensureScriptKind = ensureScriptKind;
-    function getScriptKindFromFileName(fileName) {
-        var ext = fileName.substr(fileName.lastIndexOf("."));
-        switch (ext.toLowerCase()) {
-            case ".js":
-                return 1;
-            case ".jsx":
-                return 2;
-            case ".ts":
-                return 3;
-            case ".tsx":
-                return 4;
-            default:
-                return 0;
-        }
-    }
-    ts.getScriptKindFromFileName = getScriptKindFromFileName;
-    ts.supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
-    ts.supportedJavascriptExtensions = [".js", ".jsx"];
-    var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
-    function getSupportedExtensions(options) {
-        return options && options.allowJs ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
-    }
-    ts.getSupportedExtensions = getSupportedExtensions;
-    function isSupportedSourceFileName(fileName, compilerOptions) {
-        if (!fileName) {
-            return false;
-        }
-        for (var _i = 0, _a = getSupportedExtensions(compilerOptions); _i < _a.length; _i++) {
-            var extension = _a[_i];
-            if (fileExtensionIs(fileName, extension)) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.isSupportedSourceFileName = isSupportedSourceFileName;
-    var extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
-    function removeFileExtension(path) {
-        for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
-            var ext = extensionsToRemove_1[_i];
-            if (fileExtensionIs(path, ext)) {
-                return path.substr(0, path.length - ext.length);
-            }
-        }
-        return path;
-    }
-    ts.removeFileExtension = removeFileExtension;
-    function Symbol(flags, name) {
-        this.flags = flags;
-        this.name = name;
-        this.declarations = undefined;
-    }
-    function Type(checker, flags) {
-        this.flags = flags;
-    }
-    function Signature(checker) {
-    }
-    function Node(kind, pos, end) {
-        this.kind = kind;
-        this.pos = pos;
-        this.end = end;
-        this.flags = 0;
-        this.parent = undefined;
-    }
-    ts.objectAllocator = {
-        getNodeConstructor: function () { return Node; },
-        getSourceFileConstructor: function () { return Node; },
-        getSymbolConstructor: function () { return Symbol; },
-        getTypeConstructor: function () { return Type; },
-        getSignatureConstructor: function () { return Signature; }
-    };
-    var Debug;
-    (function (Debug) {
-        var currentAssertionLevel = 0;
-        function shouldAssert(level) {
-            return currentAssertionLevel >= level;
-        }
-        Debug.shouldAssert = shouldAssert;
-        function assert(expression, message, verboseDebugInfo) {
-            if (!expression) {
-                var verboseDebugString = "";
-                if (verboseDebugInfo) {
-                    verboseDebugString = "\r\nVerbose Debug Information: " + verboseDebugInfo();
-                }
-                debugger;
-                throw new Error("Debug Failure. False expression: " + (message || "") + verboseDebugString);
-            }
-        }
-        Debug.assert = assert;
-        function fail(message) {
-            Debug.assert(false, message);
-        }
-        Debug.fail = fail;
-    })(Debug = ts.Debug || (ts.Debug = {}));
-    function copyListRemovingItem(item, list) {
-        var copiedList = [];
-        for (var _i = 0, list_1 = list; _i < list_1.length; _i++) {
-            var e = list_1[_i];
-            if (e !== item) {
-                copiedList.push(e);
-            }
-        }
-        return copiedList;
-    }
-    ts.copyListRemovingItem = copyListRemovingItem;
-    function createGetCanonicalFileName(useCaseSensitivefileNames) {
-        return useCaseSensitivefileNames
-            ? (function (fileName) { return fileName; })
-            : (function (fileName) { return fileName.toLowerCase(); });
-    }
-    ts.createGetCanonicalFileName = createGetCanonicalFileName;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.sys = (function () {
-        function getWScriptSystem() {
-            var fso = new ActiveXObject("Scripting.FileSystemObject");
-            var fileStream = new ActiveXObject("ADODB.Stream");
-            fileStream.Type = 2;
-            var binaryStream = new ActiveXObject("ADODB.Stream");
-            binaryStream.Type = 1;
-            var args = [];
-            for (var i = 0; i < WScript.Arguments.length; i++) {
-                args[i] = WScript.Arguments.Item(i);
-            }
-            function readFile(fileName, encoding) {
-                if (!fso.FileExists(fileName)) {
-                    return undefined;
-                }
-                fileStream.Open();
-                try {
-                    if (encoding) {
-                        fileStream.Charset = encoding;
-                        fileStream.LoadFromFile(fileName);
-                    }
-                    else {
-                        fileStream.Charset = "x-ansi";
-                        fileStream.LoadFromFile(fileName);
-                        var bom = fileStream.ReadText(2) || "";
-                        fileStream.Position = 0;
-                        fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
-                    }
-                    return fileStream.ReadText();
-                }
-                catch (e) {
-                    throw e;
-                }
-                finally {
-                    fileStream.Close();
-                }
-            }
-            function writeFile(fileName, data, writeByteOrderMark) {
-                fileStream.Open();
-                binaryStream.Open();
-                try {
-                    fileStream.Charset = "utf-8";
-                    fileStream.WriteText(data);
-                    if (writeByteOrderMark) {
-                        fileStream.Position = 0;
-                    }
-                    else {
-                        fileStream.Position = 3;
-                    }
-                    fileStream.CopyTo(binaryStream);
-                    binaryStream.SaveToFile(fileName, 2);
-                }
-                finally {
-                    binaryStream.Close();
-                    fileStream.Close();
-                }
-            }
-            function getCanonicalPath(path) {
-                return path.toLowerCase();
-            }
-            function getNames(collection) {
-                var result = [];
-                for (var e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
-                    result.push(e.item().Name);
-                }
-                return result.sort();
-            }
-            function getDirectories(path) {
-                var folder = fso.GetFolder(path);
-                return getNames(folder.subfolders);
-            }
-            function readDirectory(path, extension, exclude) {
-                var result = [];
-                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
-                visitDirectory(path);
-                return result;
-                function visitDirectory(path) {
-                    var folder = fso.GetFolder(path || ".");
-                    var files = getNames(folder.files);
-                    for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
-                        var current = files_1[_i];
-                        var name_1 = ts.combinePaths(path, current);
-                        if ((!extension || ts.fileExtensionIs(name_1, extension)) && !ts.contains(exclude, getCanonicalPath(name_1))) {
-                            result.push(name_1);
-                        }
-                    }
-                    var subfolders = getNames(folder.subfolders);
-                    for (var _a = 0, subfolders_1 = subfolders; _a < subfolders_1.length; _a++) {
-                        var current = subfolders_1[_a];
-                        var name_2 = ts.combinePaths(path, current);
-                        if (!ts.contains(exclude, getCanonicalPath(name_2))) {
-                            visitDirectory(name_2);
-                        }
-                    }
-                }
-            }
-            return {
-                args: args,
-                newLine: "\r\n",
-                useCaseSensitiveFileNames: false,
-                write: function (s) {
-                    WScript.StdOut.Write(s);
-                },
-                readFile: readFile,
-                writeFile: writeFile,
-                resolvePath: function (path) {
-                    return fso.GetAbsolutePathName(path);
-                },
-                fileExists: function (path) {
-                    return fso.FileExists(path);
-                },
-                directoryExists: function (path) {
-                    return fso.FolderExists(path);
-                },
-                createDirectory: function (directoryName) {
-                    if (!this.directoryExists(directoryName)) {
-                        fso.CreateFolder(directoryName);
-                    }
-                },
-                getExecutingFilePath: function () {
-                    return WScript.ScriptFullName;
-                },
-                getCurrentDirectory: function () {
-                    return new ActiveXObject("WScript.Shell").CurrentDirectory;
-                },
-                getDirectories: getDirectories,
-                readDirectory: readDirectory,
-                exit: function (exitCode) {
-                    try {
-                        WScript.Quit(exitCode);
-                    }
-                    catch (e) {
-                    }
-                }
-            };
-        }
-        function getNodeSystem() {
-            var _fs = require("fs");
-            var _path = require("path");
-            var _os = require("os");
-            var _crypto = require("crypto");
-            var useNonPollingWatchers = process.env["TSC_NONPOLLING_WATCHER"];
-            function createWatchedFileSet() {
-                var dirWatchers = {};
-                var fileWatcherCallbacks = {};
-                return { addFile: addFile, removeFile: removeFile };
-                function reduceDirWatcherRefCountForFile(fileName) {
-                    var dirName = ts.getDirectoryPath(fileName);
-                    if (ts.hasProperty(dirWatchers, dirName)) {
-                        var watcher = dirWatchers[dirName];
-                        watcher.referenceCount -= 1;
-                        if (watcher.referenceCount <= 0) {
-                            watcher.close();
-                            delete dirWatchers[dirName];
-                        }
-                    }
-                }
-                function addDirWatcher(dirPath) {
-                    if (ts.hasProperty(dirWatchers, dirPath)) {
-                        var watcher_1 = dirWatchers[dirPath];
-                        watcher_1.referenceCount += 1;
-                        return;
-                    }
-                    var watcher = _fs.watch(dirPath, { persistent: true }, function (eventName, relativeFileName) { return fileEventHandler(eventName, relativeFileName, dirPath); });
-                    watcher.referenceCount = 1;
-                    dirWatchers[dirPath] = watcher;
-                    return;
-                }
-                function addFileWatcherCallback(filePath, callback) {
-                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
-                        fileWatcherCallbacks[filePath].push(callback);
-                    }
-                    else {
-                        fileWatcherCallbacks[filePath] = [callback];
-                    }
-                }
-                function addFile(fileName, callback) {
-                    addFileWatcherCallback(fileName, callback);
-                    addDirWatcher(ts.getDirectoryPath(fileName));
-                    return { fileName: fileName, callback: callback };
-                }
-                function removeFile(watchedFile) {
-                    removeFileWatcherCallback(watchedFile.fileName, watchedFile.callback);
-                    reduceDirWatcherRefCountForFile(watchedFile.fileName);
-                }
-                function removeFileWatcherCallback(filePath, callback) {
-                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
-                        var newCallbacks = ts.copyListRemovingItem(callback, fileWatcherCallbacks[filePath]);
-                        if (newCallbacks.length === 0) {
-                            delete fileWatcherCallbacks[filePath];
-                        }
-                        else {
-                            fileWatcherCallbacks[filePath] = newCallbacks;
-                        }
-                    }
-                }
-                function fileEventHandler(eventName, relativeFileName, baseDirPath) {
-                    var fileName = typeof relativeFileName !== "string"
-                        ? undefined
-                        : ts.getNormalizedAbsolutePath(relativeFileName, baseDirPath);
-                    if ((eventName === "change" || eventName === "rename") && ts.hasProperty(fileWatcherCallbacks, fileName)) {
-                        for (var _i = 0, _a = fileWatcherCallbacks[fileName]; _i < _a.length; _i++) {
-                            var fileCallback = _a[_i];
-                            fileCallback(fileName);
-                        }
-                    }
-                }
-            }
-            var watchedFileSet = createWatchedFileSet();
-            function isNode4OrLater() {
-                return parseInt(process.version.charAt(1)) >= 4;
-            }
-            var platform = _os.platform();
-            var useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
-            function readFile(fileName, encoding) {
-                if (!fileExists(fileName)) {
-                    return undefined;
-                }
-                var buffer = _fs.readFileSync(fileName);
-                var len = buffer.length;
-                if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
-                    len &= ~1;
-                    for (var i = 0; i < len; i += 2) {
-                        var temp = buffer[i];
-                        buffer[i] = buffer[i + 1];
-                        buffer[i + 1] = temp;
-                    }
-                    return buffer.toString("utf16le", 2);
-                }
-                if (len >= 2 && buffer[0] === 0xFF && buffer[1] === 0xFE) {
-                    return buffer.toString("utf16le", 2);
-                }
-                if (len >= 3 && buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
-                    return buffer.toString("utf8", 3);
-                }
-                return buffer.toString("utf8");
-            }
-            function writeFile(fileName, data, writeByteOrderMark) {
-                if (writeByteOrderMark) {
-                    data = "\uFEFF" + data;
-                }
-                var fd;
-                try {
-                    fd = _fs.openSync(fileName, "w");
-                    _fs.writeSync(fd, data, undefined, "utf8");
-                }
-                finally {
-                    if (fd !== undefined) {
-                        _fs.closeSync(fd);
-                    }
-                }
-            }
-            function getCanonicalPath(path) {
-                return useCaseSensitiveFileNames ? path : path.toLowerCase();
-            }
-            function fileSystemEntryExists(path, entryKind) {
-                try {
-                    var stat = _fs.statSync(path);
-                    switch (entryKind) {
-                        case 0: return stat.isFile();
-                        case 1: return stat.isDirectory();
-                    }
-                }
-                catch (e) {
-                    return false;
-                }
-            }
-            function fileExists(path) {
-                return fileSystemEntryExists(path, 0);
-            }
-            function directoryExists(path) {
-                return fileSystemEntryExists(path, 1);
-            }
-            function getDirectories(path) {
-                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1); });
-            }
-            function readDirectory(path, extension, exclude) {
-                var result = [];
-                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
-                visitDirectory(path);
-                return result;
-                function visitDirectory(path) {
-                    var files = _fs.readdirSync(path || ".").sort();
-                    var directories = [];
-                    for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
-                        var current = files_2[_i];
-                        if (current === "." || current === "..") {
-                            continue;
-                        }
-                        var name_3 = ts.combinePaths(path, current);
-                        if (!ts.contains(exclude, getCanonicalPath(name_3))) {
-                            var stat = _fs.statSync(name_3);
-                            if (stat.isFile()) {
-                                if (!extension || ts.fileExtensionIs(name_3, extension)) {
-                                    result.push(name_3);
-                                }
-                            }
-                            else if (stat.isDirectory()) {
-                                directories.push(name_3);
-                            }
-                        }
-                    }
-                    for (var _a = 0, directories_1 = directories; _a < directories_1.length; _a++) {
-                        var current = directories_1[_a];
-                        visitDirectory(current);
-                    }
-                }
-            }
-            return {
-                args: process.argv.slice(2),
-                newLine: _os.EOL,
-                useCaseSensitiveFileNames: useCaseSensitiveFileNames,
-                write: function (s) {
-                    process.stdout.write(s);
-                },
-                readFile: readFile,
-                writeFile: writeFile,
-                watchFile: function (fileName, callback) {
-                    if (useNonPollingWatchers) {
-                        var watchedFile_1 = watchedFileSet.addFile(fileName, callback);
-                        return {
-                            close: function () { return watchedFileSet.removeFile(watchedFile_1); }
-                        };
-                    }
-                    else {
-                        _fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
-                        return {
-                            close: function () { return _fs.unwatchFile(fileName, fileChanged); }
-                        };
-                    }
-                    function fileChanged(curr, prev) {
-                        if (+curr.mtime <= +prev.mtime) {
-                            return;
-                        }
-                        callback(fileName);
-                    }
-                },
-                watchDirectory: function (directoryName, callback, recursive) {
-                    var options;
-                    if (isNode4OrLater() && (process.platform === "win32" || process.platform === "darwin")) {
-                        options = { persistent: true, recursive: !!recursive };
-                    }
-                    else {
-                        options = { persistent: true };
-                    }
-                    return _fs.watch(directoryName, options, function (eventName, relativeFileName) {
-                        if (eventName === "rename") {
-                            callback(!relativeFileName ? relativeFileName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
-                        }
-                        ;
-                    });
-                },
-                resolvePath: function (path) {
-                    return _path.resolve(path);
-                },
-                fileExists: fileExists,
-                directoryExists: directoryExists,
-                createDirectory: function (directoryName) {
-                    if (!this.directoryExists(directoryName)) {
-                        _fs.mkdirSync(directoryName);
-                    }
-                },
-                getExecutingFilePath: function () {
-                    return __filename;
-                },
-                getCurrentDirectory: function () {
-                    return process.cwd();
-                },
-                getDirectories: getDirectories,
-                readDirectory: readDirectory,
-                getModifiedTime: function (path) {
-                    try {
-                        return _fs.statSync(path).mtime;
-                    }
-                    catch (e) {
-                        return undefined;
-                    }
-                },
-                createHash: function (data) {
-                    var hash = _crypto.createHash("md5");
-                    hash.update(data);
-                    return hash.digest("hex");
-                },
-                getMemoryUsage: function () {
-                    if (global.gc) {
-                        global.gc();
-                    }
-                    return process.memoryUsage().heapUsed;
-                },
-                exit: function (exitCode) {
-                    process.exit(exitCode);
-                },
-                realpath: function (path) {
-                    return _fs.realpathSync(path);
-                }
-            };
-        }
-        function getChakraSystem() {
-            var realpath = ChakraHost.realpath && (function (path) { return ChakraHost.realpath(path); });
-            return {
-                newLine: ChakraHost.newLine || "\r\n",
-                args: ChakraHost.args,
-                useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
-                write: ChakraHost.echo,
-                readFile: function (path, encoding) {
-                    return ChakraHost.readFile(path);
-                },
-                writeFile: function (path, data, writeByteOrderMark) {
-                    if (writeByteOrderMark) {
-                        data = "\uFEFF" + data;
-                    }
-                    ChakraHost.writeFile(path, data);
-                },
-                resolvePath: ChakraHost.resolvePath,
-                fileExists: ChakraHost.fileExists,
-                directoryExists: ChakraHost.directoryExists,
-                createDirectory: ChakraHost.createDirectory,
-                getExecutingFilePath: function () { return ChakraHost.executingFile; },
-                getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
-                getDirectories: ChakraHost.getDirectories,
-                readDirectory: ChakraHost.readDirectory,
-                exit: ChakraHost.quit,
-                realpath: realpath
-            };
-        }
-        if (typeof ChakraHost !== "undefined") {
-            return getChakraSystem();
-        }
-        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
-            return getWScriptSystem();
-        }
-        else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
-            return getNodeSystem();
-        }
-        else {
-            return undefined;
-        }
-    })();
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.Diagnostics = {
-        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
-        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
-        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
-        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
-        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
-        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
-        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
-        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
-        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
-        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
-        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
-        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
-        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
-        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
-        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
-        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
-        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
-        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
-        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
-        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
-        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
-        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
-        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
-        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
-        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
-        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
-        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
-        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
-        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
-        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
-        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
-        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
-        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
-        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
-        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
-        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
-        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
-        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
-        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
-        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
-        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
-        Type_0_is_not_a_valid_async_function_return_type: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_1055", message: "Type '{0}' is not a valid async function return type." },
-        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
-        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
-        Operand_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "Operand_for_await_does_not_have_a_valid_callable_then_member_1058", message: "Operand for 'await' does not have a valid callable 'then' member." },
-        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: { code: 1059, category: ts.DiagnosticCategory.Error, key: "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059", message: "Return expression in async function does not have a valid callable 'then' member." },
-        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: { code: 1060, category: ts.DiagnosticCategory.Error, key: "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060", message: "Expression body for async arrow function does not have a valid callable 'then' member." },
-        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
-        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
-        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
-        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
-        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
-        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
-        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
-        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
-        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
-        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
-        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher." },
-        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
-        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
-        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
-        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
-        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
-        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
-        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
-        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
-        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
-        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
-        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
-        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
-        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
-        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
-        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
-        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
-        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
-        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
-        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
-        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
-        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
-        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'" },
-        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
-        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
-        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
-        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
-        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
-        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
-        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
-        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
-        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
-        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
-        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
-        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
-        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
-        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
-        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
-        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
-        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
-        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
-        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
-        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
-        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
-        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
-        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
-        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
-        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
-        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
-        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
-        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
-        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
-        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
-        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
-        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
-        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
-        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
-        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
-        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
-        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
-        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
-        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
-        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
-        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
-        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
-        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
-        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
-        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
-        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
-        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
-        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
-        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
-        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
-        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
-        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
-        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
-        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
-        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
-        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
-        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
-        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
-        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
-        A_parameter_property_may_not_be_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_a_binding_pattern_1187", message: "A parameter property may not be a binding pattern." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
-        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
-        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
-        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
-        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
-        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
-        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
-        Catch_clause_variable_name_must_be_an_identifier: { code: 1195, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_name_must_be_an_identifier_1195", message: "Catch clause variable name must be an identifier." },
-        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
-        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
-        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
-        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
-        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
-        Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
-        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
-        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
-        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
-        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
-        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
-        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
-        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
-        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
-        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
-        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
-        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
-        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
-        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
-        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
-        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
-        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
-        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
-        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
-        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
-        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
-        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
-        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
-        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
-        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
-        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
-        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
-        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
-        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
-        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
-        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
-        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
-        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
-        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
-        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
-        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
-        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
-        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
-        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
-        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
-        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
-        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
-        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
-        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
-        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
-        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
-        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
-        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
-        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
-        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
-        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
-        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
-        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
-        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
-        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
-        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
-        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
-        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
-        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
-        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
-        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
-        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
-        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
-        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
-        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
-        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
-        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
-        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
-        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
-        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
-        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
-        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
-        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
-        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
-        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
-        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
-        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
-        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
-        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
-        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
-        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
-        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
-        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
-        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
-        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
-        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
-        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
-        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
-        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
-        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
-        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
-        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
-        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
-        Supplied_parameters_do_not_match_any_signature_of_call_target: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Supplied_parameters_do_not_match_any_signature_of_call_target_2346", message: "Supplied parameters do not match any signature of call target." },
-        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
-        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
-        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_2349", message: "Cannot invoke an expression whose type lacks a call signature." },
-        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
-        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
-        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
-        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
-        No_best_common_type_exists_among_return_expressions: { code: 2354, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_return_expressions_2354", message: "No best common type exists among return expressions." },
-        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
-        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
-        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357", message: "The operand of an increment or decrement operator must be a variable, property or indexer." },
-        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
-        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
-        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
-        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter" },
-        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_of_assignment_expression_2364", message: "Invalid left-hand side of assignment expression." },
-        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
-        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
-        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'" },
-        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
-        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
-        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
-        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
-        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
-        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
-        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
-        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
-        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
-        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
-        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
-        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
-        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
-        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
-        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
-        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
-        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
-        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
-        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
-        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
-        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
-        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
-        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
-        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
-        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
-        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
-        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
-        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
-        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
-        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
-        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
-        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
-        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
-        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
-        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
-        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
-        Invalid_left_hand_side_in_for_in_statement: { code: 2406, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_in_statement_2406", message: "Invalid left-hand side in 'for...in' statement." },
-        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
-        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
-        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class" },
-        All_symbols_within_a_with_block_will_be_resolved_to_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "All_symbols_within_a_with_block_will_be_resolved_to_any_2410", message: "All symbols within a 'with' block will be resolved to 'any'." },
-        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
-        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
-        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
-        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'" },
-        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
-        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
-        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
-        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
-        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
-        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
-        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'" },
-        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
-        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
-        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'" },
-        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
-        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged" },
-        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged" },
-        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
-        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
-        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name" },
-        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'" },
-        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
-        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'" },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
-        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
-        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
-        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
-        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
-        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
-        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
-        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
-        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: { code: 2449, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449", message: "The operand of an increment or decrement operator cannot be a constant or a read-only property." },
-        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450", message: "Left-hand side of assignment expression cannot be a constant or a read-only property." },
-        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
-        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
-        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
-        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
-        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
-        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
-        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'" },
-        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
-        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
-        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
-        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
-        A_rest_element_must_be_last_in_an_array_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462", message: "A rest element must be last in an array destructuring pattern" },
-        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
-        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
-        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
-        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
-        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
-        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
-        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
-        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
-        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
-        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
-        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
-        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
-        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
-        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
-        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
-        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
-        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
-        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
-        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
-        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
-        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'" },
-        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2485, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485", message: "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2486, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486", message: "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property." },
-        Invalid_left_hand_side_in_for_of_statement: { code: 2487, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_of_statement_2487", message: "Invalid left-hand side in 'for...of' statement." },
-        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
-        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
-        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
-        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause" },
-        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
-        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
-        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
-        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
-        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
-        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
-        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
-        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
-        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
-        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
-        No_best_common_type_exists_among_yield_expressions: { code: 2504, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_yield_expressions_2504", message: "No best common type exists among yield expressions." },
-        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
-        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
-        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
-        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
-        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
-        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
-        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
-        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
-        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
-        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
-        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
-        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
-        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
-        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
-        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
-        The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_function_expression: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_2522", message: "The 'arguments' object cannot be referenced in an async arrow function. Consider using a standard async function expression." },
-        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
-        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
-        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
-        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
-        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
-        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
-        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
-        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
-        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
-        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
-        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
-        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
-        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
-        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
-        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'" },
-        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
-        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
-        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
-        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property" },
-        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property" },
-        Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: ts.DiagnosticCategory.Error, key: "Cannot_emit_namespaced_JSX_elements_in_React_2650", message: "Cannot emit namespaced JSX elements in React" },
-        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
-        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
-        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
-        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
-        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
-        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element" },
-        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'" },
-        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
-        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
-        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
-        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
-        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
-        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
-        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
-        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
-        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
-        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
-        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
-        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
-        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
-        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
-        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
-        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
-        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
-        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
-        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
-        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: { code: 2679, category: ts.DiagnosticCategory.Error, key: "A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void_2679", message: "A function that is called with the 'new' keyword cannot have a 'this' type that is 'void'." },
-        A_this_parameter_must_be_the_first_parameter: { code: 2680, category: ts.DiagnosticCategory.Error, key: "A_this_parameter_must_be_the_first_parameter_2680", message: "A 'this' parameter must be the first parameter." },
-        A_constructor_cannot_have_a_this_parameter: { code: 2681, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_have_a_this_parameter_2681", message: "A constructor cannot have a 'this' parameter." },
-        get_and_set_accessor_must_have_the_same_this_type: { code: 2682, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_this_type_2682", message: "'get' and 'set' accessor must have the same 'this' type." },
-        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
-        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
-        The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
-        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
-        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
-        Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
-        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4006, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4006", message: "Type parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4008, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4008", message: "Type parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4010, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4010", message: "Type parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4012, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4012", message: "Type parameter '{0}' of public method from exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4014, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", message: "Type parameter '{0}' of method from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4016, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", message: "Type parameter '{0}' of exported function has or is using private name '{1}'." },
-        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4019, category: ts.DiagnosticCategory.Error, key: "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", message: "Implements clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "Extends clause of exported interface '{0}' has or is using private name '{1}'." },
-        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4023, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", message: "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named." },
-        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: { code: 4024, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", message: "Exported variable '{0}' has or is using name '{1}' from private module '{2}'." },
-        Exported_variable_0_has_or_is_using_private_name_1: { code: 4025, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_private_name_1_4025", message: "Exported variable '{0}' has or is using private name '{1}'." },
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4026, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026", message: "Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4027, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4027", message: "Public static property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
-        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4028, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_private_name_1_4028", message: "Public static property '{0}' of exported class has or is using private name '{1}'." },
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4029, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029", message: "Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4030, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4030", message: "Public property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
-        Public_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4031, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_private_name_1_4031", message: "Public property '{0}' of exported class has or is using private name '{1}'." },
-        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4032, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4032", message: "Property '{0}' of exported interface has or is using name '{1}' from private module '{2}'." },
-        Property_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4033, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_private_name_1_4033", message: "Property '{0}' of exported interface has or is using private name '{1}'." },
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4034, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_4034", message: "Parameter '{0}' of public static property setter from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4035, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1_4035", message: "Parameter '{0}' of public static property setter from exported class has or is using private name '{1}'." },
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4036, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_4036", message: "Parameter '{0}' of public property setter from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4037, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1_4037", message: "Parameter '{0}' of public property setter from exported class has or is using private name '{1}'." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4038, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_externa_4038", message: "Return type of public static property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4039, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_4039", message: "Return type of public static property getter from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4040, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0_4040", message: "Return type of public static property getter from exported class has or is using private name '{0}'." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4041, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_modul_4041", message: "Return type of public property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4042, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_4042", message: "Return type of public property getter from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4043, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0_4043", message: "Return type of public property getter from exported class has or is using private name '{0}'." },
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4044, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_mod_4044", message: "Return type of constructor signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4045, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0_4045", message: "Return type of constructor signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4046, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4046", message: "Return type of call signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4047, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0_4047", message: "Return type of call signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4048, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4048", message: "Return type of index signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4049, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0_4049", message: "Return type of index signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4050, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module__4050", message: "Return type of public static method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4051, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4051", message: "Return type of public static method from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: { code: 4052, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0_4052", message: "Return type of public static method from exported class has or is using private name '{0}'." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4053, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_c_4053", message: "Return type of public method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4054, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4054", message: "Return type of public method from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: { code: 4055, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0_4055", message: "Return type of public method from exported class has or is using private name '{0}'." },
-        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4056, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4056", message: "Return type of method from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: { code: 4057, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0_4057", message: "Return type of method from exported interface has or is using private name '{0}'." },
-        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4058, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named_4058", message: "Return type of exported function has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: { code: 4059, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1_4059", message: "Return type of exported function has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_exported_function_has_or_is_using_private_name_0: { code: 4060, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_private_name_0_4060", message: "Return type of exported function has or is using private name '{0}'." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4061, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_can_4061", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4062, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2_4062", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: { code: 4063, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1_4063", message: "Parameter '{0}' of constructor from exported class has or is using private name '{1}'." },
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4064, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_mod_4064", message: "Parameter '{0}' of constructor signature from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4065, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4065", message: "Parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4066, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4066", message: "Parameter '{0}' of call signature from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4067, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4067", message: "Parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4068, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module__4068", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4069, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4069", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4070, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4070", message: "Parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4071, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_c_4071", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4072, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4072", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4073, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4073", message: "Parameter '{0}' of public method from exported class has or is using private name '{1}'." },
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4074, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4074", message: "Parameter '{0}' of method from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4075, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4075", message: "Parameter '{0}' of method from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4076, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4076", message: "Parameter '{0}' of exported function has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: { code: 4077, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2_4077", message: "Parameter '{0}' of exported function has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4078, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", message: "Parameter '{0}' of exported function has or is using private name '{1}'." },
-        Exported_type_alias_0_has_or_is_using_private_name_1: { code: 4081, category: ts.DiagnosticCategory.Error, key: "Exported_type_alias_0_has_or_is_using_private_name_1_4081", message: "Exported type alias '{0}' has or is using private name '{1}'." },
-        Default_export_of_the_module_has_or_is_using_private_name_0: { code: 4082, category: ts.DiagnosticCategory.Error, key: "Default_export_of_the_module_has_or_is_using_private_name_0_4082", message: "Default export of the module has or is using private name '{0}'." },
-        Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict: { code: 4090, category: ts.DiagnosticCategory.Message, key: "Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_t_4090", message: "Conflicting library definitions for '{0}' found at '{1}' and '{2}'. Copy the correct file to the 'typings' folder to resolve this conflict." },
-        The_current_host_does_not_support_the_0_option: { code: 5001, category: ts.DiagnosticCategory.Error, key: "The_current_host_does_not_support_the_0_option_5001", message: "The current host does not support the '{0}' option." },
-        Cannot_find_the_common_subdirectory_path_for_the_input_files: { code: 5009, category: ts.DiagnosticCategory.Error, key: "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", message: "Cannot find the common subdirectory path for the input files." },
-        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}" },
-        Unsupported_file_encoding: { code: 5013, category: ts.DiagnosticCategory.Error, key: "Unsupported_file_encoding_5013", message: "Unsupported file encoding." },
-        Failed_to_parse_file_0_Colon_1: { code: 5014, category: ts.DiagnosticCategory.Error, key: "Failed_to_parse_file_0_Colon_1_5014", message: "Failed to parse file '{0}': {1}." },
-        Unknown_compiler_option_0: { code: 5023, category: ts.DiagnosticCategory.Error, key: "Unknown_compiler_option_0_5023", message: "Unknown compiler option '{0}'." },
-        Compiler_option_0_requires_a_value_of_type_1: { code: 5024, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_requires_a_value_of_type_1_5024", message: "Compiler option '{0}' requires a value of type {1}." },
-        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}" },
-        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: { code: 5042, category: ts.DiagnosticCategory.Error, key: "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", message: "Option 'project' cannot be mixed with source files on a command line." },
-        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: { code: 5047, category: ts.DiagnosticCategory.Error, key: "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", message: "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher." },
-        Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: { code: 5051, category: ts.DiagnosticCategory.Error, key: "Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_prov_5051", message: "Option 'inlineSources' can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided." },
-        Option_0_cannot_be_specified_without_specifying_option_1: { code: 5052, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_without_specifying_option_1_5052", message: "Option '{0}' cannot be specified without specifying option '{1}'." },
-        Option_0_cannot_be_specified_with_option_1: { code: 5053, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_with_option_1_5053", message: "Option '{0}' cannot be specified with option '{1}'." },
-        A_tsconfig_json_file_is_already_defined_at_Colon_0: { code: 5054, category: ts.DiagnosticCategory.Error, key: "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", message: "A 'tsconfig.json' file is already defined at: '{0}'." },
-        Cannot_write_file_0_because_it_would_overwrite_input_file: { code: 5055, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", message: "Cannot write file '{0}' because it would overwrite input file." },
-        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: { code: 5056, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", message: "Cannot write file '{0}' because it would be overwritten by multiple input files." },
-        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'" },
-        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'" },
-        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: { code: 5059, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", message: "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier." },
-        Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
-        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
-        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
-        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
-        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
-        Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
-        Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
-        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: { code: 6003, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", message: "Specify the location where debugger should locate map files instead of generated locations." },
-        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: { code: 6004, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations_6004", message: "Specify the location where debugger should locate TypeScript files instead of source locations." },
-        Watch_input_files: { code: 6005, category: ts.DiagnosticCategory.Message, key: "Watch_input_files_6005", message: "Watch input files." },
-        Redirect_output_structure_to_the_directory: { code: 6006, category: ts.DiagnosticCategory.Message, key: "Redirect_output_structure_to_the_directory_6006", message: "Redirect output structure to the directory." },
-        Do_not_erase_const_enum_declarations_in_generated_code: { code: 6007, category: ts.DiagnosticCategory.Message, key: "Do_not_erase_const_enum_declarations_in_generated_code_6007", message: "Do not erase const enum declarations in generated code." },
-        Do_not_emit_outputs_if_any_errors_were_reported: { code: 6008, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_if_any_errors_were_reported_6008", message: "Do not emit outputs if any errors were reported." },
-        Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
-        Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
-        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
-        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
-        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
-        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
-        Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
-        Print_the_compiler_s_version: { code: 6019, category: ts.DiagnosticCategory.Message, key: "Print_the_compiler_s_version_6019", message: "Print the compiler's version." },
-        Compile_the_project_in_the_given_directory: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_in_the_given_directory_6020", message: "Compile the project in the given directory." },
-        Syntax_Colon_0: { code: 6023, category: ts.DiagnosticCategory.Message, key: "Syntax_Colon_0_6023", message: "Syntax: {0}" },
-        options: { code: 6024, category: ts.DiagnosticCategory.Message, key: "options_6024", message: "options" },
-        file: { code: 6025, category: ts.DiagnosticCategory.Message, key: "file_6025", message: "file" },
-        Examples_Colon_0: { code: 6026, category: ts.DiagnosticCategory.Message, key: "Examples_Colon_0_6026", message: "Examples: {0}" },
-        Options_Colon: { code: 6027, category: ts.DiagnosticCategory.Message, key: "Options_Colon_6027", message: "Options:" },
-        Version_0: { code: 6029, category: ts.DiagnosticCategory.Message, key: "Version_0_6029", message: "Version {0}" },
-        Insert_command_line_options_and_files_from_a_file: { code: 6030, category: ts.DiagnosticCategory.Message, key: "Insert_command_line_options_and_files_from_a_file_6030", message: "Insert command line options and files from a file." },
-        File_change_detected_Starting_incremental_compilation: { code: 6032, category: ts.DiagnosticCategory.Message, key: "File_change_detected_Starting_incremental_compilation_6032", message: "File change detected. Starting incremental compilation..." },
-        KIND: { code: 6034, category: ts.DiagnosticCategory.Message, key: "KIND_6034", message: "KIND" },
-        FILE: { code: 6035, category: ts.DiagnosticCategory.Message, key: "FILE_6035", message: "FILE" },
-        VERSION: { code: 6036, category: ts.DiagnosticCategory.Message, key: "VERSION_6036", message: "VERSION" },
-        LOCATION: { code: 6037, category: ts.DiagnosticCategory.Message, key: "LOCATION_6037", message: "LOCATION" },
-        DIRECTORY: { code: 6038, category: ts.DiagnosticCategory.Message, key: "DIRECTORY_6038", message: "DIRECTORY" },
-        Compilation_complete_Watching_for_file_changes: { code: 6042, category: ts.DiagnosticCategory.Message, key: "Compilation_complete_Watching_for_file_changes_6042", message: "Compilation complete. Watching for file changes." },
-        Generates_corresponding_map_file: { code: 6043, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_map_file_6043", message: "Generates corresponding '.map' file." },
-        Compiler_option_0_expects_an_argument: { code: 6044, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_expects_an_argument_6044", message: "Compiler option '{0}' expects an argument." },
-        Unterminated_quoted_string_in_response_file_0: { code: 6045, category: ts.DiagnosticCategory.Error, key: "Unterminated_quoted_string_in_response_file_0_6045", message: "Unterminated quoted string in response file '{0}'." },
-        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}" },
-        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: { code: 6048, category: ts.DiagnosticCategory.Error, key: "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", message: "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'." },
-        Unsupported_locale_0: { code: 6049, category: ts.DiagnosticCategory.Error, key: "Unsupported_locale_0_6049", message: "Unsupported locale '{0}'." },
-        Unable_to_open_file_0: { code: 6050, category: ts.DiagnosticCategory.Error, key: "Unable_to_open_file_0_6050", message: "Unable to open file '{0}'." },
-        Corrupted_locale_file_0: { code: 6051, category: ts.DiagnosticCategory.Error, key: "Corrupted_locale_file_0_6051", message: "Corrupted locale file {0}." },
-        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: { code: 6052, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_expressions_and_declarations_with_an_implied_any_type_6052", message: "Raise error on expressions and declarations with an implied 'any' type." },
-        File_0_not_found: { code: 6053, category: ts.DiagnosticCategory.Error, key: "File_0_not_found_6053", message: "File '{0}' not found." },
-        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: { code: 6054, category: ts.DiagnosticCategory.Error, key: "File_0_has_unsupported_extension_The_only_supported_extensions_are_1_6054", message: "File '{0}' has unsupported extension. The only supported extensions are {1}." },
-        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: { code: 6055, category: ts.DiagnosticCategory.Message, key: "Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures_6055", message: "Suppress noImplicitAny errors for indexing objects lacking index signatures." },
-        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: { code: 6056, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_declarations_for_code_that_has_an_internal_annotation_6056", message: "Do not emit declarations for code that has an '@internal' annotation." },
-        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: { code: 6058, category: ts.DiagnosticCategory.Message, key: "Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir_6058", message: "Specify the root directory of input files. Use to control the output directory structure with --outDir." },
-        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: { code: 6059, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files_6059", message: "File '{0}' is not under 'rootDir' '{1}'. 'rootDir' is expected to contain all source files." },
-        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: { code: 6060, category: ts.DiagnosticCategory.Message, key: "Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix_6060", message: "Specify the end of line sequence to be used when emitting files: 'CRLF' (dos) or 'LF' (unix)." },
-        NEWLINE: { code: 6061, category: ts.DiagnosticCategory.Message, key: "NEWLINE_6061", message: "NEWLINE" },
-        Option_0_can_only_be_specified_in_tsconfig_json_file: { code: 6064, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_specified_in_tsconfig_json_file_6064", message: "Option '{0}' can only be specified in 'tsconfig.json' file." },
-        Enables_experimental_support_for_ES7_decorators: { code: 6065, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_decorators_6065", message: "Enables experimental support for ES7 decorators." },
-        Enables_experimental_support_for_emitting_type_metadata_for_decorators: { code: 6066, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_emitting_type_metadata_for_decorators_6066", message: "Enables experimental support for emitting type metadata for decorators." },
-        Enables_experimental_support_for_ES7_async_functions: { code: 6068, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_async_functions_6068", message: "Enables experimental support for ES7 async functions." },
-        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: { code: 6069, category: ts.DiagnosticCategory.Message, key: "Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6_6069", message: "Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6)." },
-        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: { code: 6070, category: ts.DiagnosticCategory.Message, key: "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", message: "Initializes a TypeScript project and creates a tsconfig.json file." },
-        Successfully_created_a_tsconfig_json_file: { code: 6071, category: ts.DiagnosticCategory.Message, key: "Successfully_created_a_tsconfig_json_file_6071", message: "Successfully created a tsconfig.json file." },
-        Suppress_excess_property_checks_for_object_literals: { code: 6072, category: ts.DiagnosticCategory.Message, key: "Suppress_excess_property_checks_for_object_literals_6072", message: "Suppress excess property checks for object literals." },
-        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context. (experimental)" },
-        Do_not_report_errors_on_unused_labels: { code: 6074, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unused_labels_6074", message: "Do not report errors on unused labels." },
-        Report_error_when_not_all_code_paths_in_function_return_a_value: { code: 6075, category: ts.DiagnosticCategory.Message, key: "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", message: "Report error when not all code paths in function return a value." },
-        Report_errors_for_fallthrough_cases_in_switch_statement: { code: 6076, category: ts.DiagnosticCategory.Message, key: "Report_errors_for_fallthrough_cases_in_switch_statement_6076", message: "Report errors for fallthrough cases in switch statement." },
-        Do_not_report_errors_on_unreachable_code: { code: 6077, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unreachable_code_6077", message: "Do not report errors on unreachable code." },
-        Disallow_inconsistently_cased_references_to_the_same_file: { code: 6078, category: ts.DiagnosticCategory.Message, key: "Disallow_inconsistently_cased_references_to_the_same_file_6078", message: "Disallow inconsistently-cased references to the same file." },
-        Specify_library_files_to_be_included_in_the_compilation_Colon: { code: 6079, category: ts.DiagnosticCategory.Message, key: "Specify_library_files_to_be_included_in_the_compilation_Colon_6079", message: "Specify library files to be included in the compilation: " },
-        Specify_JSX_code_generation_Colon_preserve_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_or_react_6080", message: "Specify JSX code generation: 'preserve' or 'react'" },
-        Only_amd_and_system_modules_are_supported_alongside_0: { code: 6082, category: ts.DiagnosticCategory.Error, key: "Only_amd_and_system_modules_are_supported_alongside_0_6082", message: "Only 'amd' and 'system' modules are supported alongside --{0}." },
-        Base_directory_to_resolve_non_absolute_module_names: { code: 6083, category: ts.DiagnosticCategory.Message, key: "Base_directory_to_resolve_non_absolute_module_names_6083", message: "Base directory to resolve non-absolute module names." },
-        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084", message: "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit" },
-        Enable_tracing_of_the_name_resolution_process: { code: 6085, category: ts.DiagnosticCategory.Message, key: "Enable_tracing_of_the_name_resolution_process_6085", message: "Enable tracing of the name resolution process." },
-        Resolving_module_0_from_1: { code: 6086, category: ts.DiagnosticCategory.Message, key: "Resolving_module_0_from_1_6086", message: "======== Resolving module '{0}' from '{1}'. ========" },
-        Explicitly_specified_module_resolution_kind_Colon_0: { code: 6087, category: ts.DiagnosticCategory.Message, key: "Explicitly_specified_module_resolution_kind_Colon_0_6087", message: "Explicitly specified module resolution kind: '{0}'." },
-        Module_resolution_kind_is_not_specified_using_0: { code: 6088, category: ts.DiagnosticCategory.Message, key: "Module_resolution_kind_is_not_specified_using_0_6088", message: "Module resolution kind is not specified, using '{0}'." },
-        Module_name_0_was_successfully_resolved_to_1: { code: 6089, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_successfully_resolved_to_1_6089", message: "======== Module name '{0}' was successfully resolved to '{1}'. ========" },
-        Module_name_0_was_not_resolved: { code: 6090, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_not_resolved_6090", message: "======== Module name '{0}' was not resolved. ========" },
-        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: { code: 6091, category: ts.DiagnosticCategory.Message, key: "paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0_6091", message: "'paths' option is specified, looking for a pattern to match module name '{0}'." },
-        Module_name_0_matched_pattern_1: { code: 6092, category: ts.DiagnosticCategory.Message, key: "Module_name_0_matched_pattern_1_6092", message: "Module name '{0}', matched pattern '{1}'." },
-        Trying_substitution_0_candidate_module_location_Colon_1: { code: 6093, category: ts.DiagnosticCategory.Message, key: "Trying_substitution_0_candidate_module_location_Colon_1_6093", message: "Trying substitution '{0}', candidate module location: '{1}'." },
-        Resolving_module_name_0_relative_to_base_url_1_2: { code: 6094, category: ts.DiagnosticCategory.Message, key: "Resolving_module_name_0_relative_to_base_url_1_2_6094", message: "Resolving module name '{0}' relative to base url '{1}' - '{2}'." },
-        Loading_module_as_file_Slash_folder_candidate_module_location_0: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095", message: "Loading module as file / folder, candidate module location '{0}'." },
-        File_0_does_not_exist: { code: 6096, category: ts.DiagnosticCategory.Message, key: "File_0_does_not_exist_6096", message: "File '{0}' does not exist." },
-        File_0_exist_use_it_as_a_name_resolution_result: { code: 6097, category: ts.DiagnosticCategory.Message, key: "File_0_exist_use_it_as_a_name_resolution_result_6097", message: "File '{0}' exist - use it as a name resolution result." },
-        Loading_module_0_from_node_modules_folder: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_6098", message: "Loading module '{0}' from 'node_modules' folder." },
-        Found_package_json_at_0: { code: 6099, category: ts.DiagnosticCategory.Message, key: "Found_package_json_at_0_6099", message: "Found 'package.json' at '{0}'." },
-        package_json_does_not_have_types_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_types_field_6100", message: "'package.json' does not have 'types' field." },
-        package_json_has_0_field_1_that_references_2: { code: 6101, category: ts.DiagnosticCategory.Message, key: "package_json_has_0_field_1_that_references_2_6101", message: "'package.json' has '{0}' field '{1}' that references '{2}'." },
-        Allow_javascript_files_to_be_compiled: { code: 6102, category: ts.DiagnosticCategory.Message, key: "Allow_javascript_files_to_be_compiled_6102", message: "Allow javascript files to be compiled." },
-        Option_0_should_have_array_of_strings_as_a_value: { code: 6103, category: ts.DiagnosticCategory.Error, key: "Option_0_should_have_array_of_strings_as_a_value_6103", message: "Option '{0}' should have array of strings as a value." },
-        Checking_if_0_is_the_longest_matching_prefix_for_1_2: { code: 6104, category: ts.DiagnosticCategory.Message, key: "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", message: "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'." },
-        Expected_type_of_0_field_in_package_json_to_be_string_got_1: { code: 6105, category: ts.DiagnosticCategory.Message, key: "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", message: "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'." },
-        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'" },
-        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'" },
-        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'" },
-        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'" },
-        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'" },
-        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed" },
-        Do_not_emit_use_strict_directives_in_module_output: { code: 6112, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_use_strict_directives_in_module_output_6112", message: "Do not emit 'use strict' directives in module output." },
-        Enable_strict_null_checks: { code: 6113, category: ts.DiagnosticCategory.Message, key: "Enable_strict_null_checks_6113", message: "Enable strict null checks." },
-        Unknown_option_excludes_Did_you_mean_exclude: { code: 6114, category: ts.DiagnosticCategory.Error, key: "Unknown_option_excludes_Did_you_mean_exclude_6114", message: "Unknown option 'excludes'. Did you mean 'exclude'?" },
-        Raise_error_on_this_expressions_with_an_implied_any_type: { code: 6115, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_this_expressions_with_an_implied_any_type_6115", message: "Raise error on 'this' expressions with an implied 'any' type." },
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: { code: 6116, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_2_6116", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory '{2}'. ========" },
-        Resolving_using_primary_search_paths: { code: 6117, category: ts.DiagnosticCategory.Message, key: "Resolving_using_primary_search_paths_6117", message: "Resolving using primary search paths..." },
-        Resolving_from_node_modules_folder: { code: 6118, category: ts.DiagnosticCategory.Message, key: "Resolving_from_node_modules_folder_6118", message: "Resolving from node_modules folder..." },
-        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: { code: 6119, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", message: "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========" },
-        Type_reference_directive_0_was_not_resolved: { code: 6120, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_not_resolved_6120", message: "======== Type reference directive '{0}' was not resolved. ========" },
-        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'" },
-        Root_directory_cannot_be_determined_skipping_primary_search_paths: { code: 6122, category: ts.DiagnosticCategory.Message, key: "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", message: "Root directory cannot be determined, skipping primary search paths." },
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: { code: 6123, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========" },
-        Type_declaration_files_to_be_included_in_compilation: { code: 6124, category: ts.DiagnosticCategory.Message, key: "Type_declaration_files_to_be_included_in_compilation_6124", message: "Type declaration files to be included in compilation." },
-        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'" },
-        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: { code: 6126, category: ts.DiagnosticCategory.Message, key: "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", message: "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder." },
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: { code: 6127, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", message: "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========" },
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
-        The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
-        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
-        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
-        Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
-        Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
-        Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
-        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: { code: 7009, category: ts.DiagnosticCategory.Error, key: "new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type_7009", message: "'new' expression, whose target lacks a construct signature, implicitly has an 'any' type." },
-        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: { code: 7010, category: ts.DiagnosticCategory.Error, key: "_0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type_7010", message: "'{0}', which lacks return-type annotation, implicitly has an '{1}' return type." },
-        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: { code: 7011, category: ts.DiagnosticCategory.Error, key: "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", message: "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type." },
-        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7013, category: ts.DiagnosticCategory.Error, key: "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", message: "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type." },
-        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: { code: 7015, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", message: "Element implicitly has an 'any' type because index expression is not of type 'number'." },
-        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation: { code: 7016, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation_7016", message: "Property '{0}' implicitly has type 'any', because its 'set' accessor lacks a type annotation." },
-        Index_signature_of_object_type_implicitly_has_an_any_type: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Index_signature_of_object_type_implicitly_has_an_any_type_7017", message: "Index signature of object type implicitly has an 'any' type." },
-        Object_literal_s_property_0_implicitly_has_an_1_type: { code: 7018, category: ts.DiagnosticCategory.Error, key: "Object_literal_s_property_0_implicitly_has_an_1_type_7018", message: "Object literal's property '{0}' implicitly has an '{1}' type." },
-        Rest_parameter_0_implicitly_has_an_any_type: { code: 7019, category: ts.DiagnosticCategory.Error, key: "Rest_parameter_0_implicitly_has_an_any_type_7019", message: "Rest parameter '{0}' implicitly has an 'any[]' type." },
-        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7020, category: ts.DiagnosticCategory.Error, key: "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", message: "Call signature, which lacks return-type annotation, implicitly has an 'any' return type." },
-        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: { code: 7022, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or__7022", message: "'{0}' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer." },
-        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7023, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", message: "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
-        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7024, category: ts.DiagnosticCategory.Error, key: "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", message: "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
-        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: { code: 7025, category: ts.DiagnosticCategory.Error, key: "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", message: "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type." },
-        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists" },
-        Unreachable_code_detected: { code: 7027, category: ts.DiagnosticCategory.Error, key: "Unreachable_code_detected_7027", message: "Unreachable code detected." },
-        Unused_label: { code: 7028, category: ts.DiagnosticCategory.Error, key: "Unused_label_7028", message: "Unused label." },
-        Fallthrough_case_in_switch: { code: 7029, category: ts.DiagnosticCategory.Error, key: "Fallthrough_case_in_switch_7029", message: "Fallthrough case in switch." },
-        Not_all_code_paths_return_a_value: { code: 7030, category: ts.DiagnosticCategory.Error, key: "Not_all_code_paths_return_a_value_7030", message: "Not all code paths return a value." },
-        Binding_element_0_implicitly_has_an_1_type: { code: 7031, category: ts.DiagnosticCategory.Error, key: "Binding_element_0_implicitly_has_an_1_type_7031", message: "Binding element '{0}' implicitly has an '{1}' type." },
-        You_cannot_rename_this_element: { code: 8000, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_this_element_8000", message: "You cannot rename this element." },
-        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: { code: 8001, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", message: "You cannot rename elements that are defined in the standard TypeScript library." },
-        import_can_only_be_used_in_a_ts_file: { code: 8002, category: ts.DiagnosticCategory.Error, key: "import_can_only_be_used_in_a_ts_file_8002", message: "'import ... =' can only be used in a .ts file." },
-        export_can_only_be_used_in_a_ts_file: { code: 8003, category: ts.DiagnosticCategory.Error, key: "export_can_only_be_used_in_a_ts_file_8003", message: "'export=' can only be used in a .ts file." },
-        type_parameter_declarations_can_only_be_used_in_a_ts_file: { code: 8004, category: ts.DiagnosticCategory.Error, key: "type_parameter_declarations_can_only_be_used_in_a_ts_file_8004", message: "'type parameter declarations' can only be used in a .ts file." },
-        implements_clauses_can_only_be_used_in_a_ts_file: { code: 8005, category: ts.DiagnosticCategory.Error, key: "implements_clauses_can_only_be_used_in_a_ts_file_8005", message: "'implements clauses' can only be used in a .ts file." },
-        interface_declarations_can_only_be_used_in_a_ts_file: { code: 8006, category: ts.DiagnosticCategory.Error, key: "interface_declarations_can_only_be_used_in_a_ts_file_8006", message: "'interface declarations' can only be used in a .ts file." },
-        module_declarations_can_only_be_used_in_a_ts_file: { code: 8007, category: ts.DiagnosticCategory.Error, key: "module_declarations_can_only_be_used_in_a_ts_file_8007", message: "'module declarations' can only be used in a .ts file." },
-        type_aliases_can_only_be_used_in_a_ts_file: { code: 8008, category: ts.DiagnosticCategory.Error, key: "type_aliases_can_only_be_used_in_a_ts_file_8008", message: "'type aliases' can only be used in a .ts file." },
-        _0_can_only_be_used_in_a_ts_file: { code: 8009, category: ts.DiagnosticCategory.Error, key: "_0_can_only_be_used_in_a_ts_file_8009", message: "'{0}' can only be used in a .ts file." },
-        types_can_only_be_used_in_a_ts_file: { code: 8010, category: ts.DiagnosticCategory.Error, key: "types_can_only_be_used_in_a_ts_file_8010", message: "'types' can only be used in a .ts file." },
-        type_arguments_can_only_be_used_in_a_ts_file: { code: 8011, category: ts.DiagnosticCategory.Error, key: "type_arguments_can_only_be_used_in_a_ts_file_8011", message: "'type arguments' can only be used in a .ts file." },
-        parameter_modifiers_can_only_be_used_in_a_ts_file: { code: 8012, category: ts.DiagnosticCategory.Error, key: "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", message: "'parameter modifiers' can only be used in a .ts file." },
-        property_declarations_can_only_be_used_in_a_ts_file: { code: 8014, category: ts.DiagnosticCategory.Error, key: "property_declarations_can_only_be_used_in_a_ts_file_8014", message: "'property declarations' can only be used in a .ts file." },
-        enum_declarations_can_only_be_used_in_a_ts_file: { code: 8015, category: ts.DiagnosticCategory.Error, key: "enum_declarations_can_only_be_used_in_a_ts_file_8015", message: "'enum declarations' can only be used in a .ts file." },
-        type_assertion_expressions_can_only_be_used_in_a_ts_file: { code: 8016, category: ts.DiagnosticCategory.Error, key: "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", message: "'type assertion expressions' can only be used in a .ts file." },
-        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses." },
-        class_expressions_are_not_currently_supported: { code: 9003, category: ts.DiagnosticCategory.Error, key: "class_expressions_are_not_currently_supported_9003", message: "'class' expressions are not currently supported." },
-        JSX_attributes_must_only_be_assigned_a_non_empty_expression: { code: 17000, category: ts.DiagnosticCategory.Error, key: "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", message: "JSX attributes must only be assigned a non-empty 'expression'." },
-        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: { code: 17001, category: ts.DiagnosticCategory.Error, key: "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", message: "JSX elements cannot have multiple attributes with the same name." },
-        Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: ts.DiagnosticCategory.Error, key: "Expected_corresponding_JSX_closing_tag_for_0_17002", message: "Expected corresponding JSX closing tag for '{0}'." },
-        JSX_attribute_expected: { code: 17003, category: ts.DiagnosticCategory.Error, key: "JSX_attribute_expected_17003", message: "JSX attribute expected." },
-        Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: ts.DiagnosticCategory.Error, key: "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", message: "Cannot use JSX unless the '--jsx' flag is provided." },
-        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'" },
-        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17006, category: ts.DiagnosticCategory.Error, key: "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", message: "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
-        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17007, category: ts.DiagnosticCategory.Error, key: "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", message: "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
-        JSX_element_0_has_no_corresponding_closing_tag: { code: 17008, category: ts.DiagnosticCategory.Error, key: "JSX_element_0_has_no_corresponding_closing_tag_17008", message: "JSX element '{0}' has no corresponding closing tag." },
-        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: { code: 17009, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", message: "'super' must be called before accessing 'this' in the constructor of a derived class." },
-        Unknown_typing_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_typing_option_0_17010", message: "Unknown typing option '{0}'." }
-    };
-})(ts || (ts = {}));
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11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    function lookupInUnicodeMap(code, map) {
-        if (code < map[0]) {
-            return false;
-        }
-        var lo = 0;
-        var hi = map.length;
-        var mid;
-        while (lo + 1 < hi) {
-            mid = lo + (hi - lo) / 2;
-            mid -= mid % 2;
-            if (map[mid] <= code && code <= map[mid + 1]) {
-                return true;
-            }
-            if (code < map[mid]) {
-                hi = mid;
-            }
-            else {
-                lo = mid + 2;
-            }
-        }
-        return false;
-    }
-    function isUnicodeIdentifierStart(code, languageVersion) {
-        return languageVersion >= 1 ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
-    }
-    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
-    function isUnicodeIdentifierPart(code, languageVersion) {
-        return languageVersion >= 1 ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
-    }
-    function makeReverseMap(source) {
-        var result = [];
-        for (var name_4 in source) {
-            if (source.hasOwnProperty(name_4)) {
-                result[source[name_4]] = name_4;
-            }
-        }
-        return result;
-    }
-    var tokenStrings = makeReverseMap(textToToken);
-    function tokenToString(t) {
-        return tokenStrings[t];
-    }
-    ts.tokenToString = tokenToString;
-    function stringToToken(s) {
-        return textToToken[s];
-    }
-    ts.stringToToken = stringToToken;
-    function computeLineStarts(text) {
-        var result = new Array();
-        var pos = 0;
-        var lineStart = 0;
-        while (pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 13:
-                    if (text.charCodeAt(pos) === 10) {
-                        pos++;
-                    }
-                case 10:
-                    result.push(lineStart);
-                    lineStart = pos;
-                    break;
-                default:
-                    if (ch > 127 && isLineBreak(ch)) {
-                        result.push(lineStart);
-                        lineStart = pos;
-                    }
-                    break;
-            }
-        }
-        result.push(lineStart);
-        return result;
-    }
-    ts.computeLineStarts = computeLineStarts;
-    function getPositionOfLineAndCharacter(sourceFile, line, character) {
-        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
-    }
-    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
-    function computePositionOfLineAndCharacter(lineStarts, line, character) {
-        ts.Debug.assert(line >= 0 && line < lineStarts.length);
-        return lineStarts[line] + character;
-    }
-    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
-    function getLineStarts(sourceFile) {
-        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
-    }
-    ts.getLineStarts = getLineStarts;
-    function computeLineAndCharacterOfPosition(lineStarts, position) {
-        var lineNumber = ts.binarySearch(lineStarts, position);
-        if (lineNumber < 0) {
-            lineNumber = ~lineNumber - 1;
-            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
-        }
-        return {
-            line: lineNumber,
-            character: position - lineStarts[lineNumber]
-        };
-    }
-    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
-    function getLineAndCharacterOfPosition(sourceFile, position) {
-        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
-    }
-    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-    function isWhiteSpace(ch) {
-        return ch === 32 ||
-            ch === 9 ||
-            ch === 11 ||
-            ch === 12 ||
-            ch === 160 ||
-            ch === 133 ||
-            ch === 5760 ||
-            ch >= 8192 && ch <= 8203 ||
-            ch === 8239 ||
-            ch === 8287 ||
-            ch === 12288 ||
-            ch === 65279;
-    }
-    ts.isWhiteSpace = isWhiteSpace;
-    function isLineBreak(ch) {
-        return ch === 10 ||
-            ch === 13 ||
-            ch === 8232 ||
-            ch === 8233;
-    }
-    ts.isLineBreak = isLineBreak;
-    function isDigit(ch) {
-        return ch >= 48 && ch <= 57;
-    }
-    function isOctalDigit(ch) {
-        return ch >= 48 && ch <= 55;
-    }
-    ts.isOctalDigit = isOctalDigit;
-    function couldStartTrivia(text, pos) {
-        var ch = text.charCodeAt(pos);
-        switch (ch) {
-            case 13:
-            case 10:
-            case 9:
-            case 11:
-            case 12:
-            case 32:
-            case 47:
-            case 60:
-            case 61:
-            case 62:
-                return true;
-            case 35:
-                return pos === 0;
-            default:
-                return ch > 127;
-        }
-    }
-    ts.couldStartTrivia = couldStartTrivia;
-    function skipTrivia(text, pos, stopAfterLineBreak) {
-        if (!(pos >= 0)) {
-            return pos;
-        }
-        while (true) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13:
-                    if (text.charCodeAt(pos + 1) === 10) {
-                        pos++;
-                    }
-                case 10:
-                    pos++;
-                    if (stopAfterLineBreak) {
-                        return pos;
-                    }
-                    continue;
-                case 9:
-                case 11:
-                case 12:
-                case 32:
-                    pos++;
-                    continue;
-                case 47:
-                    if (text.charCodeAt(pos + 1) === 47) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (isLineBreak(text.charCodeAt(pos))) {
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    if (text.charCodeAt(pos + 1) === 42) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
-                                pos += 2;
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    break;
-                case 60:
-                case 61:
-                case 62:
-                    if (isConflictMarkerTrivia(text, pos)) {
-                        pos = scanConflictMarkerTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                case 35:
-                    if (pos === 0 && isShebangTrivia(text, pos)) {
-                        pos = scanShebangTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                default:
-                    if (ch > 127 && (isWhiteSpace(ch) || isLineBreak(ch))) {
-                        pos++;
-                        continue;
-                    }
-                    break;
-            }
-            return pos;
-        }
-    }
-    ts.skipTrivia = skipTrivia;
-    var mergeConflictMarkerLength = "<<<<<<<".length;
-    function isConflictMarkerTrivia(text, pos) {
-        ts.Debug.assert(pos >= 0);
-        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
-            var ch = text.charCodeAt(pos);
-            if ((pos + mergeConflictMarkerLength) < text.length) {
-                for (var i = 0, n = mergeConflictMarkerLength; i < n; i++) {
-                    if (text.charCodeAt(pos + i) !== ch) {
-                        return false;
-                    }
-                }
-                return ch === 61 ||
-                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32;
-            }
-        }
-        return false;
-    }
-    function scanConflictMarkerTrivia(text, pos, error) {
-        if (error) {
-            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
-        }
-        var ch = text.charCodeAt(pos);
-        var len = text.length;
-        if (ch === 60 || ch === 62) {
-            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
-                pos++;
-            }
-        }
-        else {
-            ts.Debug.assert(ch === 61);
-            while (pos < len) {
-                var ch_1 = text.charCodeAt(pos);
-                if (ch_1 === 62 && isConflictMarkerTrivia(text, pos)) {
-                    break;
-                }
-                pos++;
-            }
-        }
-        return pos;
-    }
-    var shebangTriviaRegex = /^#!.*/;
-    function isShebangTrivia(text, pos) {
-        ts.Debug.assert(pos === 0);
-        return shebangTriviaRegex.test(text);
-    }
-    function scanShebangTrivia(text, pos) {
-        var shebang = shebangTriviaRegex.exec(text)[0];
-        pos = pos + shebang.length;
-        return pos;
-    }
-    function getCommentRanges(text, pos, trailing) {
-        var result;
-        var collecting = trailing || pos === 0;
-        while (pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13:
-                    if (text.charCodeAt(pos + 1) === 10) {
-                        pos++;
-                    }
-                case 10:
-                    pos++;
-                    if (trailing) {
-                        return result;
-                    }
-                    collecting = true;
-                    if (result && result.length) {
-                        ts.lastOrUndefined(result).hasTrailingNewLine = true;
-                    }
-                    continue;
-                case 9:
-                case 11:
-                case 12:
-                case 32:
-                    pos++;
-                    continue;
-                case 47:
-                    var nextChar = text.charCodeAt(pos + 1);
-                    var hasTrailingNewLine = false;
-                    if (nextChar === 47 || nextChar === 42) {
-                        var kind = nextChar === 47 ? 2 : 3;
-                        var startPos = pos;
-                        pos += 2;
-                        if (nextChar === 47) {
-                            while (pos < text.length) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    hasTrailingNewLine = true;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        else {
-                            while (pos < text.length) {
-                                if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
-                                    pos += 2;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        if (collecting) {
-                            if (!result) {
-                                result = [];
-                            }
-                            result.push({ pos: startPos, end: pos, hasTrailingNewLine: hasTrailingNewLine, kind: kind });
-                        }
-                        continue;
-                    }
-                    break;
-                default:
-                    if (ch > 127 && (isWhiteSpace(ch) || isLineBreak(ch))) {
-                        if (result && result.length && isLineBreak(ch)) {
-                            ts.lastOrUndefined(result).hasTrailingNewLine = true;
-                        }
-                        pos++;
-                        continue;
-                    }
-                    break;
-            }
-            return result;
-        }
-        return result;
-    }
-    function getLeadingCommentRanges(text, pos) {
-        return getCommentRanges(text, pos, false);
-    }
-    ts.getLeadingCommentRanges = getLeadingCommentRanges;
-    function getTrailingCommentRanges(text, pos) {
-        return getCommentRanges(text, pos, true);
-    }
-    ts.getTrailingCommentRanges = getTrailingCommentRanges;
-    function getShebang(text) {
-        return shebangTriviaRegex.test(text)
-            ? shebangTriviaRegex.exec(text)[0]
-            : undefined;
-    }
-    ts.getShebang = getShebang;
-    function isIdentifierStart(ch, languageVersion) {
-        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
-            ch === 36 || ch === 95 ||
-            ch > 127 && isUnicodeIdentifierStart(ch, languageVersion);
-    }
-    ts.isIdentifierStart = isIdentifierStart;
-    function isIdentifierPart(ch, languageVersion) {
-        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
-            ch >= 48 && ch <= 57 || ch === 36 || ch === 95 ||
-            ch > 127 && isUnicodeIdentifierPart(ch, languageVersion);
-    }
-    ts.isIdentifierPart = isIdentifierPart;
-    function isIdentifier(name, languageVersion) {
-        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
-            return false;
-        }
-        for (var i = 1, n = name.length; i < n; i++) {
-            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.isIdentifier = isIdentifier;
-    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
-        if (languageVariant === void 0) { languageVariant = 0; }
-        var pos;
-        var end;
-        var startPos;
-        var tokenPos;
-        var token;
-        var tokenValue;
-        var precedingLineBreak;
-        var hasExtendedUnicodeEscape;
-        var tokenIsUnterminated;
-        setText(text, start, length);
-        return {
-            getStartPos: function () { return startPos; },
-            getTextPos: function () { return pos; },
-            getToken: function () { return token; },
-            getTokenPos: function () { return tokenPos; },
-            getTokenText: function () { return text.substring(tokenPos, pos); },
-            getTokenValue: function () { return tokenValue; },
-            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
-            hasPrecedingLineBreak: function () { return precedingLineBreak; },
-            isIdentifier: function () { return token === 69 || token > 105; },
-            isReservedWord: function () { return token >= 70 && token <= 105; },
-            isUnterminated: function () { return tokenIsUnterminated; },
-            reScanGreaterToken: reScanGreaterToken,
-            reScanSlashToken: reScanSlashToken,
-            reScanTemplateToken: reScanTemplateToken,
-            scanJsxIdentifier: scanJsxIdentifier,
-            reScanJsxToken: reScanJsxToken,
-            scanJsxToken: scanJsxToken,
-            scanJSDocToken: scanJSDocToken,
-            scan: scan,
-            setText: setText,
-            setScriptTarget: setScriptTarget,
-            setLanguageVariant: setLanguageVariant,
-            setOnError: setOnError,
-            setTextPos: setTextPos,
-            tryScan: tryScan,
-            lookAhead: lookAhead,
-            scanRange: scanRange
-        };
-        function error(message, length) {
-            if (onError) {
-                onError(message, length || 0);
-            }
-        }
-        function scanNumber() {
-            var start = pos;
-            while (isDigit(text.charCodeAt(pos)))
-                pos++;
-            if (text.charCodeAt(pos) === 46) {
-                pos++;
-                while (isDigit(text.charCodeAt(pos)))
-                    pos++;
-            }
-            var end = pos;
-            if (text.charCodeAt(pos) === 69 || text.charCodeAt(pos) === 101) {
-                pos++;
-                if (text.charCodeAt(pos) === 43 || text.charCodeAt(pos) === 45)
-                    pos++;
-                if (isDigit(text.charCodeAt(pos))) {
-                    pos++;
-                    while (isDigit(text.charCodeAt(pos)))
-                        pos++;
-                    end = pos;
-                }
-                else {
-                    error(ts.Diagnostics.Digit_expected);
-                }
-            }
-            return "" + +(text.substring(start, end));
-        }
-        function scanOctalDigits() {
-            var start = pos;
-            while (isOctalDigit(text.charCodeAt(pos))) {
-                pos++;
-            }
-            return +(text.substring(start, pos));
-        }
-        function scanExactNumberOfHexDigits(count) {
-            return scanHexDigits(count, false);
-        }
-        function scanMinimumNumberOfHexDigits(count) {
-            return scanHexDigits(count, true);
-        }
-        function scanHexDigits(minCount, scanAsManyAsPossible) {
-            var digits = 0;
-            var value = 0;
-            while (digits < minCount || scanAsManyAsPossible) {
-                var ch = text.charCodeAt(pos);
-                if (ch >= 48 && ch <= 57) {
-                    value = value * 16 + ch - 48;
-                }
-                else if (ch >= 65 && ch <= 70) {
-                    value = value * 16 + ch - 65 + 10;
-                }
-                else if (ch >= 97 && ch <= 102) {
-                    value = value * 16 + ch - 97 + 10;
-                }
-                else {
-                    break;
-                }
-                pos++;
-                digits++;
-            }
-            if (digits < minCount) {
-                value = -1;
-            }
-            return value;
-        }
-        function scanString() {
-            var quote = text.charCodeAt(pos);
-            pos++;
-            var result = "";
-            var start = pos;
-            while (true) {
-                if (pos >= end) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
-                }
-                var ch = text.charCodeAt(pos);
-                if (ch === quote) {
-                    result += text.substring(start, pos);
-                    pos++;
-                    break;
-                }
-                if (ch === 92) {
-                    result += text.substring(start, pos);
-                    result += scanEscapeSequence();
-                    start = pos;
-                    continue;
-                }
-                if (isLineBreak(ch)) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
-                }
-                pos++;
-            }
-            return result;
-        }
-        function scanTemplateAndSetTokenValue() {
-            var startedWithBacktick = text.charCodeAt(pos) === 96;
-            pos++;
-            var start = pos;
-            var contents = "";
-            var resultingToken;
-            while (true) {
-                if (pos >= end) {
-                    contents += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_template_literal);
-                    resultingToken = startedWithBacktick ? 11 : 14;
-                    break;
-                }
-                var currChar = text.charCodeAt(pos);
-                if (currChar === 96) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    resultingToken = startedWithBacktick ? 11 : 14;
-                    break;
-                }
-                if (currChar === 36 && pos + 1 < end && text.charCodeAt(pos + 1) === 123) {
-                    contents += text.substring(start, pos);
-                    pos += 2;
-                    resultingToken = startedWithBacktick ? 12 : 13;
-                    break;
-                }
-                if (currChar === 92) {
-                    contents += text.substring(start, pos);
-                    contents += scanEscapeSequence();
-                    start = pos;
-                    continue;
-                }
-                if (currChar === 13) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    if (pos < end && text.charCodeAt(pos) === 10) {
-                        pos++;
-                    }
-                    contents += "\n";
-                    start = pos;
-                    continue;
-                }
-                pos++;
-            }
-            ts.Debug.assert(resultingToken !== undefined);
-            tokenValue = contents;
-            return resultingToken;
-        }
-        function scanEscapeSequence() {
-            pos++;
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                return "";
-            }
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 48:
-                    return "\0";
-                case 98:
-                    return "\b";
-                case 116:
-                    return "\t";
-                case 110:
-                    return "\n";
-                case 118:
-                    return "\v";
-                case 102:
-                    return "\f";
-                case 114:
-                    return "\r";
-                case 39:
-                    return "\'";
-                case 34:
-                    return "\"";
-                case 117:
-                    if (pos < end && text.charCodeAt(pos) === 123) {
-                        hasExtendedUnicodeEscape = true;
-                        pos++;
-                        return scanExtendedUnicodeEscape();
-                    }
-                    return scanHexadecimalEscape(4);
-                case 120:
-                    return scanHexadecimalEscape(2);
-                case 13:
-                    if (pos < end && text.charCodeAt(pos) === 10) {
-                        pos++;
-                    }
-                case 10:
-                case 8232:
-                case 8233:
-                    return "";
-                default:
-                    return String.fromCharCode(ch);
-            }
-        }
-        function scanHexadecimalEscape(numDigits) {
-            var escapedValue = scanExactNumberOfHexDigits(numDigits);
-            if (escapedValue >= 0) {
-                return String.fromCharCode(escapedValue);
-            }
-            else {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                return "";
-            }
-        }
-        function scanExtendedUnicodeEscape() {
-            var escapedValue = scanMinimumNumberOfHexDigits(1);
-            var isInvalidExtendedEscape = false;
-            if (escapedValue < 0) {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                isInvalidExtendedEscape = true;
-            }
-            else if (escapedValue > 0x10FFFF) {
-                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
-                isInvalidExtendedEscape = true;
-            }
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                isInvalidExtendedEscape = true;
-            }
-            else if (text.charCodeAt(pos) === 125) {
-                pos++;
-            }
-            else {
-                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
-                isInvalidExtendedEscape = true;
-            }
-            if (isInvalidExtendedEscape) {
-                return "";
-            }
-            return utf16EncodeAsString(escapedValue);
-        }
-        function utf16EncodeAsString(codePoint) {
-            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
-            if (codePoint <= 65535) {
-                return String.fromCharCode(codePoint);
-            }
-            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
-            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
-            return String.fromCharCode(codeUnit1, codeUnit2);
-        }
-        function peekUnicodeEscape() {
-            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117) {
-                var start_1 = pos;
-                pos += 2;
-                var value = scanExactNumberOfHexDigits(4);
-                pos = start_1;
-                return value;
-            }
-            return -1;
-        }
-        function scanIdentifierParts() {
-            var result = "";
-            var start = pos;
-            while (pos < end) {
-                var ch = text.charCodeAt(pos);
-                if (isIdentifierPart(ch, languageVersion)) {
-                    pos++;
-                }
-                else if (ch === 92) {
-                    ch = peekUnicodeEscape();
-                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
-                        break;
-                    }
-                    result += text.substring(start, pos);
-                    result += String.fromCharCode(ch);
-                    pos += 6;
-                    start = pos;
-                }
-                else {
-                    break;
-                }
-            }
-            result += text.substring(start, pos);
-            return result;
-        }
-        function getIdentifierToken() {
-            var len = tokenValue.length;
-            if (len >= 2 && len <= 11) {
-                var ch = tokenValue.charCodeAt(0);
-                if (ch >= 97 && ch <= 122 && hasOwnProperty.call(textToToken, tokenValue)) {
-                    return token = textToToken[tokenValue];
-                }
-            }
-            return token = 69;
-        }
-        function scanBinaryOrOctalDigits(base) {
-            ts.Debug.assert(base !== 2 || base !== 8, "Expected either base 2 or base 8");
-            var value = 0;
-            var numberOfDigits = 0;
-            while (true) {
-                var ch = text.charCodeAt(pos);
-                var valueOfCh = ch - 48;
-                if (!isDigit(ch) || valueOfCh >= base) {
-                    break;
-                }
-                value = value * base + valueOfCh;
-                pos++;
-                numberOfDigits++;
-            }
-            if (numberOfDigits === 0) {
-                return -1;
-            }
-            return value;
-        }
-        function scan() {
-            startPos = pos;
-            hasExtendedUnicodeEscape = false;
-            precedingLineBreak = false;
-            tokenIsUnterminated = false;
-            while (true) {
-                tokenPos = pos;
-                if (pos >= end) {
-                    return token = 1;
-                }
-                var ch = text.charCodeAt(pos);
-                if (ch === 35 && pos === 0 && isShebangTrivia(text, pos)) {
-                    pos = scanShebangTrivia(text, pos);
-                    if (skipTrivia) {
-                        continue;
-                    }
-                    else {
-                        return token = 6;
-                    }
-                }
-                switch (ch) {
-                    case 10:
-                    case 13:
-                        precedingLineBreak = true;
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            if (ch === 13 && pos + 1 < end && text.charCodeAt(pos + 1) === 10) {
-                                pos += 2;
-                            }
-                            else {
-                                pos++;
-                            }
-                            return token = 4;
-                        }
-                    case 9:
-                    case 11:
-                    case 12:
-                    case 32:
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            while (pos < end && isWhiteSpace(text.charCodeAt(pos))) {
-                                pos++;
-                            }
-                            return token = 5;
-                        }
-                    case 33:
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            if (text.charCodeAt(pos + 2) === 61) {
-                                return pos += 3, token = 33;
-                            }
-                            return pos += 2, token = 31;
-                        }
-                        pos++;
-                        return token = 49;
-                    case 34:
-                    case 39:
-                        tokenValue = scanString();
-                        return token = 9;
-                    case 96:
-                        return token = scanTemplateAndSetTokenValue();
-                    case 37:
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 62;
-                        }
-                        pos++;
-                        return token = 40;
-                    case 38:
-                        if (text.charCodeAt(pos + 1) === 38) {
-                            return pos += 2, token = 51;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 66;
-                        }
-                        pos++;
-                        return token = 46;
-                    case 40:
-                        pos++;
-                        return token = 17;
-                    case 41:
-                        pos++;
-                        return token = 18;
-                    case 42:
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 59;
-                        }
-                        if (text.charCodeAt(pos + 1) === 42) {
-                            if (text.charCodeAt(pos + 2) === 61) {
-                                return pos += 3, token = 60;
-                            }
-                            return pos += 2, token = 38;
-                        }
-                        pos++;
-                        return token = 37;
-                    case 43:
-                        if (text.charCodeAt(pos + 1) === 43) {
-                            return pos += 2, token = 41;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 57;
-                        }
-                        pos++;
-                        return token = 35;
-                    case 44:
-                        pos++;
-                        return token = 24;
-                    case 45:
-                        if (text.charCodeAt(pos + 1) === 45) {
-                            return pos += 2, token = 42;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 58;
-                        }
-                        pos++;
-                        return token = 36;
-                    case 46:
-                        if (isDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = scanNumber();
-                            return token = 8;
-                        }
-                        if (text.charCodeAt(pos + 1) === 46 && text.charCodeAt(pos + 2) === 46) {
-                            return pos += 3, token = 22;
-                        }
-                        pos++;
-                        return token = 21;
-                    case 47:
-                        if (text.charCodeAt(pos + 1) === 47) {
-                            pos += 2;
-                            while (pos < end) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    break;
-                                }
-                                pos++;
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 2;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 42) {
-                            pos += 2;
-                            var commentClosed = false;
-                            while (pos < end) {
-                                var ch_2 = text.charCodeAt(pos);
-                                if (ch_2 === 42 && text.charCodeAt(pos + 1) === 47) {
-                                    pos += 2;
-                                    commentClosed = true;
-                                    break;
-                                }
-                                if (isLineBreak(ch_2)) {
-                                    precedingLineBreak = true;
-                                }
-                                pos++;
-                            }
-                            if (!commentClosed) {
-                                error(ts.Diagnostics.Asterisk_Slash_expected);
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                tokenIsUnterminated = !commentClosed;
-                                return token = 3;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 61;
-                        }
-                        pos++;
-                        return token = 39;
-                    case 48:
-                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 || text.charCodeAt(pos + 1) === 120)) {
-                            pos += 2;
-                            var value = scanMinimumNumberOfHexDigits(1);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 || text.charCodeAt(pos + 1) === 98)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(2);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Binary_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 || text.charCodeAt(pos + 1) === 111)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(8);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Octal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8;
-                        }
-                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = "" + scanOctalDigits();
-                            return token = 8;
-                        }
-                    case 49:
-                    case 50:
-                    case 51:
-                    case 52:
-                    case 53:
-                    case 54:
-                    case 55:
-                    case 56:
-                    case 57:
-                        tokenValue = scanNumber();
-                        return token = 8;
-                    case 58:
-                        pos++;
-                        return token = 54;
-                    case 59:
-                        pos++;
-                        return token = 23;
-                    case 60:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 60) {
-                            if (text.charCodeAt(pos + 2) === 61) {
-                                return pos += 3, token = 63;
-                            }
-                            return pos += 2, token = 43;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 28;
-                        }
-                        if (languageVariant === 1 &&
-                            text.charCodeAt(pos + 1) === 47 &&
-                            text.charCodeAt(pos + 2) !== 42) {
-                            return pos += 2, token = 26;
-                        }
-                        pos++;
-                        return token = 25;
-                    case 61:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            if (text.charCodeAt(pos + 2) === 61) {
-                                return pos += 3, token = 32;
-                            }
-                            return pos += 2, token = 30;
-                        }
-                        if (text.charCodeAt(pos + 1) === 62) {
-                            return pos += 2, token = 34;
-                        }
-                        pos++;
-                        return token = 56;
-                    case 62:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7;
-                            }
-                        }
-                        pos++;
-                        return token = 27;
-                    case 63:
-                        pos++;
-                        return token = 53;
-                    case 91:
-                        pos++;
-                        return token = 19;
-                    case 93:
-                        pos++;
-                        return token = 20;
-                    case 94:
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 68;
-                        }
-                        pos++;
-                        return token = 48;
-                    case 123:
-                        pos++;
-                        return token = 15;
-                    case 124:
-                        if (text.charCodeAt(pos + 1) === 124) {
-                            return pos += 2, token = 52;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 67;
-                        }
-                        pos++;
-                        return token = 47;
-                    case 125:
-                        pos++;
-                        return token = 16;
-                    case 126:
-                        pos++;
-                        return token = 50;
-                    case 64:
-                        pos++;
-                        return token = 55;
-                    case 92:
-                        var cookedChar = peekUnicodeEscape();
-                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
-                            pos += 6;
-                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
-                            return token = getIdentifierToken();
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0;
-                    default:
-                        if (isIdentifierStart(ch, languageVersion)) {
-                            pos++;
-                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
-                                pos++;
-                            tokenValue = text.substring(tokenPos, pos);
-                            if (ch === 92) {
-                                tokenValue += scanIdentifierParts();
-                            }
-                            return token = getIdentifierToken();
-                        }
-                        else if (isWhiteSpace(ch)) {
-                            pos++;
-                            continue;
-                        }
-                        else if (isLineBreak(ch)) {
-                            precedingLineBreak = true;
-                            pos++;
-                            continue;
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0;
-                }
-            }
-        }
-        function reScanGreaterToken() {
-            if (token === 27) {
-                if (text.charCodeAt(pos) === 62) {
-                    if (text.charCodeAt(pos + 1) === 62) {
-                        if (text.charCodeAt(pos + 2) === 61) {
-                            return pos += 3, token = 65;
-                        }
-                        return pos += 2, token = 45;
-                    }
-                    if (text.charCodeAt(pos + 1) === 61) {
-                        return pos += 2, token = 64;
-                    }
-                    pos++;
-                    return token = 44;
-                }
-                if (text.charCodeAt(pos) === 61) {
-                    pos++;
-                    return token = 29;
-                }
-            }
-            return token;
-        }
-        function reScanSlashToken() {
-            if (token === 39 || token === 61) {
-                var p = tokenPos + 1;
-                var inEscape = false;
-                var inCharacterClass = false;
-                while (true) {
-                    if (p >= end) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    var ch = text.charCodeAt(p);
-                    if (isLineBreak(ch)) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    if (inEscape) {
-                        inEscape = false;
-                    }
-                    else if (ch === 47 && !inCharacterClass) {
-                        p++;
-                        break;
-                    }
-                    else if (ch === 91) {
-                        inCharacterClass = true;
-                    }
-                    else if (ch === 92) {
-                        inEscape = true;
-                    }
-                    else if (ch === 93) {
-                        inCharacterClass = false;
-                    }
-                    p++;
-                }
-                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
-                    p++;
-                }
-                pos = p;
-                tokenValue = text.substring(tokenPos, pos);
-                token = 10;
-            }
-            return token;
-        }
-        function reScanTemplateToken() {
-            ts.Debug.assert(token === 16, "'reScanTemplateToken' should only be called on a '}'");
-            pos = tokenPos;
-            return token = scanTemplateAndSetTokenValue();
-        }
-        function reScanJsxToken() {
-            pos = tokenPos = startPos;
-            return token = scanJsxToken();
-        }
-        function scanJsxToken() {
-            startPos = tokenPos = pos;
-            if (pos >= end) {
-                return token = 1;
-            }
-            var char = text.charCodeAt(pos);
-            if (char === 60) {
-                if (text.charCodeAt(pos + 1) === 47) {
-                    pos += 2;
-                    return token = 26;
-                }
-                pos++;
-                return token = 25;
-            }
-            if (char === 123) {
-                pos++;
-                return token = 15;
-            }
-            while (pos < end) {
-                pos++;
-                char = text.charCodeAt(pos);
-                if ((char === 123) || (char === 60)) {
-                    break;
-                }
-            }
-            return token = 244;
-        }
-        function scanJsxIdentifier() {
-            if (tokenIsIdentifierOrKeyword(token)) {
-                var firstCharPosition = pos;
-                while (pos < end) {
-                    var ch = text.charCodeAt(pos);
-                    if (ch === 45 || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
-                        pos++;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
-            }
-            return token;
-        }
-        function scanJSDocToken() {
-            if (pos >= end) {
-                return token = 1;
-            }
-            startPos = pos;
-            var ch = text.charCodeAt(pos);
-            while (pos < end) {
-                ch = text.charCodeAt(pos);
-                if (isWhiteSpace(ch)) {
-                    pos++;
-                }
-                else {
-                    break;
-                }
-            }
-            tokenPos = pos;
-            switch (ch) {
-                case 64:
-                    return pos += 1, token = 55;
-                case 10:
-                case 13:
-                    return pos += 1, token = 4;
-                case 42:
-                    return pos += 1, token = 37;
-                case 123:
-                    return pos += 1, token = 15;
-                case 125:
-                    return pos += 1, token = 16;
-                case 91:
-                    return pos += 1, token = 19;
-                case 93:
-                    return pos += 1, token = 20;
-                case 61:
-                    return pos += 1, token = 56;
-                case 44:
-                    return pos += 1, token = 24;
-            }
-            if (isIdentifierStart(ch, 2)) {
-                pos++;
-                while (isIdentifierPart(text.charCodeAt(pos), 2) && pos < end) {
-                    pos++;
-                }
-                return token = 69;
-            }
-            else {
-                return pos += 1, token = 0;
-            }
-        }
-        function speculationHelper(callback, isLookahead) {
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var saveTokenValue = tokenValue;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var result = callback();
-            if (!result || isLookahead) {
-                pos = savePos;
-                startPos = saveStartPos;
-                tokenPos = saveTokenPos;
-                token = saveToken;
-                tokenValue = saveTokenValue;
-                precedingLineBreak = savePrecedingLineBreak;
-            }
-            return result;
-        }
-        function scanRange(start, length, callback) {
-            var saveEnd = end;
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var saveTokenValue = tokenValue;
-            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
-            var saveTokenIsUnterminated = tokenIsUnterminated;
-            setText(text, start, length);
-            var result = callback();
-            end = saveEnd;
-            pos = savePos;
-            startPos = saveStartPos;
-            tokenPos = saveTokenPos;
-            token = saveToken;
-            precedingLineBreak = savePrecedingLineBreak;
-            tokenValue = saveTokenValue;
-            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
-            tokenIsUnterminated = saveTokenIsUnterminated;
-            return result;
-        }
-        function lookAhead(callback) {
-            return speculationHelper(callback, true);
-        }
-        function tryScan(callback) {
-            return speculationHelper(callback, false);
-        }
-        function setText(newText, start, length) {
-            text = newText || "";
-            end = length === undefined ? text.length : start + length;
-            setTextPos(start || 0);
-        }
-        function setOnError(errorCallback) {
-            onError = errorCallback;
-        }
-        function setScriptTarget(scriptTarget) {
-            languageVersion = scriptTarget;
-        }
-        function setLanguageVariant(variant) {
-            languageVariant = variant;
-        }
-        function setTextPos(textPos) {
-            ts.Debug.assert(textPos >= 0);
-            pos = textPos;
-            startPos = textPos;
-            tokenPos = textPos;
-            token = 0;
-            precedingLineBreak = false;
-            tokenValue = undefined;
-            hasExtendedUnicodeEscape = false;
-            tokenIsUnterminated = false;
-        }
-    }
-    ts.createScanner = createScanner;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.optionDeclarations = [
-        {
-            name: "charset",
-            type: "string"
-        },
-        {
-            name: "declaration",
-            shortName: "d",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_d_ts_file
-        },
-        {
-            name: "declarationDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "diagnostics",
-            type: "boolean"
-        },
-        {
-            name: "emitBOM",
-            type: "boolean"
-        },
-        {
-            name: "help",
-            shortName: "h",
-            type: "boolean",
-            description: ts.Diagnostics.Print_this_message
-        },
-        {
-            name: "help",
-            shortName: "?",
-            type: "boolean"
-        },
-        {
-            name: "init",
-            type: "boolean",
-            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file
-        },
-        {
-            name: "inlineSourceMap",
-            type: "boolean"
-        },
-        {
-            name: "inlineSources",
-            type: "boolean"
-        },
-        {
-            name: "jsx",
-            type: {
-                "preserve": 1,
-                "react": 2
-            },
-            paramType: ts.Diagnostics.KIND,
-            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_or_react
-        },
-        {
-            name: "reactNamespace",
-            type: "string",
-            description: ts.Diagnostics.Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit
-        },
-        {
-            name: "listFiles",
-            type: "boolean"
-        },
-        {
-            name: "locale",
-            type: "string"
-        },
-        {
-            name: "mapRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
-            paramType: ts.Diagnostics.LOCATION
-        },
-        {
-            name: "module",
-            shortName: "m",
-            type: {
-                "none": ts.ModuleKind.None,
-                "commonjs": ts.ModuleKind.CommonJS,
-                "amd": ts.ModuleKind.AMD,
-                "system": ts.ModuleKind.System,
-                "umd": ts.ModuleKind.UMD,
-                "es6": ts.ModuleKind.ES6,
-                "es2015": ts.ModuleKind.ES2015
-            },
-            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
-            paramType: ts.Diagnostics.KIND
-        },
-        {
-            name: "newLine",
-            type: {
-                "crlf": 0,
-                "lf": 1
-            },
-            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
-            paramType: ts.Diagnostics.NEWLINE
-        },
-        {
-            name: "noEmit",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs
-        },
-        {
-            name: "noEmitHelpers",
-            type: "boolean"
-        },
-        {
-            name: "noEmitOnError",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported
-        },
-        {
-            name: "noImplicitAny",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type
-        },
-        {
-            name: "noImplicitThis",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type
-        },
-        {
-            name: "noLib",
-            type: "boolean"
-        },
-        {
-            name: "noResolve",
-            type: "boolean"
-        },
-        {
-            name: "skipDefaultLibCheck",
-            type: "boolean"
-        },
-        {
-            name: "skipLibCheck",
-            type: "boolean",
-            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
-        },
-        {
-            name: "out",
-            type: "string",
-            isFilePath: false,
-            paramType: ts.Diagnostics.FILE
-        },
-        {
-            name: "outFile",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
-            paramType: ts.Diagnostics.FILE
-        },
-        {
-            name: "outDir",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "preserveConstEnums",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
-        },
-        {
-            name: "pretty",
-            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental,
-            type: "boolean"
-        },
-        {
-            name: "project",
-            shortName: "p",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Compile_the_project_in_the_given_directory,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "removeComments",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_comments_to_output
-        },
-        {
-            name: "rootDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.LOCATION,
-            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir
-        },
-        {
-            name: "isolatedModules",
-            type: "boolean"
-        },
-        {
-            name: "sourceMap",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_map_file
-        },
-        {
-            name: "sourceRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
-            paramType: ts.Diagnostics.LOCATION
-        },
-        {
-            name: "suppressExcessPropertyErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
-            experimental: true
-        },
-        {
-            name: "suppressImplicitAnyIndexErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures
-        },
-        {
-            name: "stripInternal",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
-            experimental: true
-        },
-        {
-            name: "target",
-            shortName: "t",
-            type: {
-                "es3": 0,
-                "es5": 1,
-                "es6": 2,
-                "es2015": 2
-            },
-            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
-            paramType: ts.Diagnostics.VERSION
-        },
-        {
-            name: "version",
-            shortName: "v",
-            type: "boolean",
-            description: ts.Diagnostics.Print_the_compiler_s_version
-        },
-        {
-            name: "watch",
-            shortName: "w",
-            type: "boolean",
-            description: ts.Diagnostics.Watch_input_files
-        },
-        {
-            name: "experimentalDecorators",
-            type: "boolean",
-            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
-        },
-        {
-            name: "emitDecoratorMetadata",
-            type: "boolean",
-            experimental: true,
-            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
-        },
-        {
-            name: "moduleResolution",
-            type: {
-                "node": ts.ModuleResolutionKind.NodeJs,
-                "classic": ts.ModuleResolutionKind.Classic
-            },
-            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6
-        },
-        {
-            name: "allowUnusedLabels",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
-        },
-        {
-            name: "noImplicitReturns",
-            type: "boolean",
-            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
-        },
-        {
-            name: "noFallthroughCasesInSwitch",
-            type: "boolean",
-            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
-        },
-        {
-            name: "allowUnreachableCode",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
-        },
-        {
-            name: "forceConsistentCasingInFileNames",
-            type: "boolean",
-            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
-        },
-        {
-            name: "baseUrl",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
-        },
-        {
-            name: "paths",
-            type: "object",
-            isTSConfigOnly: true
-        },
-        {
-            name: "rootDirs",
-            type: "list",
-            isTSConfigOnly: true,
-            element: {
-                name: "rootDirs",
-                type: "string",
-                isFilePath: true
-            }
-        },
-        {
-            name: "typesSearchPaths",
-            type: "list",
-            isTSConfigOnly: true,
-            element: {
-                name: "typesSearchPaths",
-                type: "string",
-                isFilePath: true
-            }
-        },
-        {
-            name: "typesRoot",
-            type: "string"
-        },
-        {
-            name: "types",
-            type: "list",
-            element: {
-                name: "types",
-                type: "string"
-            },
-            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
-        },
-        {
-            name: "traceResolution",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
-        },
-        {
-            name: "allowJs",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
-        },
-        {
-            name: "allowSyntheticDefaultImports",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
-        },
-        {
-            name: "noImplicitUseStrict",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
-        },
-        {
-            name: "listEmittedFiles",
-            type: "boolean"
-        },
-        {
-            name: "lib",
-            type: "list",
-            element: {
-                name: "lib",
-                type: {
-                    "es5": "lib.es5.d.ts",
-                    "es6": "lib.es2015.d.ts",
-                    "es2015": "lib.es2015.d.ts",
-                    "es7": "lib.es2016.d.ts",
-                    "es2016": "lib.es2016.d.ts",
-                    "es2017": "lib.es2017.d.ts",
-                    "dom": "lib.dom.d.ts",
-                    "webworker": "lib.webworker.d.ts",
-                    "scripthost": "lib.scripthost.d.ts",
-                    "es2015.core": "lib.es2015.core.d.ts",
-                    "es2015.collection": "lib.es2015.collection.d.ts",
-                    "es2015.generator": "lib.es2015.generator.d.ts",
-                    "es2015.iterable": "lib.es2015.iterable.d.ts",
-                    "es2015.promise": "lib.es2015.promise.d.ts",
-                    "es2015.proxy": "lib.es2015.proxy.d.ts",
-                    "es2015.reflect": "lib.es2015.reflect.d.ts",
-                    "es2015.symbol": "lib.es2015.symbol.d.ts",
-                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
-                    "es2016.array.include": "lib.es2016.array.include.d.ts",
-                    "es2017.object": "lib.es2017.object.d.ts"
-                }
-            },
-            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
-        },
-        {
-            name: "strictNullChecks",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_strict_null_checks
-        }
-    ];
-    ts.typingOptionDeclarations = [
-        {
-            name: "enableAutoDiscovery",
-            type: "boolean"
-        },
-        {
-            name: "include",
-            type: "list",
-            element: {
-                name: "include",
-                type: "string"
-            }
-        },
-        {
-            name: "exclude",
-            type: "list",
-            element: {
-                name: "exclude",
-                type: "string"
-            }
-        }
-    ];
-    var optionNameMapCache;
-    function getOptionNameMap() {
-        if (optionNameMapCache) {
-            return optionNameMapCache;
-        }
-        var optionNameMap = {};
-        var shortOptionNames = {};
-        ts.forEach(ts.optionDeclarations, function (option) {
-            optionNameMap[option.name.toLowerCase()] = option;
-            if (option.shortName) {
-                shortOptionNames[option.shortName] = option.name;
-            }
-        });
-        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
-        return optionNameMapCache;
-    }
-    ts.getOptionNameMap = getOptionNameMap;
-    function createCompilerDiagnosticForInvalidCustomType(opt) {
-        var namesOfType = [];
-        ts.forEachKey(opt.type, function (key) {
-            namesOfType.push(" '" + key + "'");
-        });
-        return ts.createCompilerDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
-    }
-    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
-    function parseCustomTypeOption(opt, value, errors) {
-        var key = trimString((value || "")).toLowerCase();
-        var map = opt.type;
-        if (ts.hasProperty(map, key)) {
-            return map[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
-    }
-    ts.parseCustomTypeOption = parseCustomTypeOption;
-    function parseListTypeOption(opt, value, errors) {
-        var values = trimString((value || "")).split(",");
-        switch (opt.element.type) {
-            case "number":
-                return ts.map(values, parseInt);
-            case "string":
-                return ts.map(values, function (v) { return v || ""; });
-            default:
-                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
-        }
-    }
-    ts.parseListTypeOption = parseListTypeOption;
-    function parseCommandLine(commandLine, readFile) {
-        var options = {};
-        var fileNames = [];
-        var errors = [];
-        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
-        parseStrings(commandLine);
-        return {
-            options: options,
-            fileNames: fileNames,
-            errors: errors
-        };
-        function parseStrings(args) {
-            var i = 0;
-            while (i < args.length) {
-                var s = args[i];
-                i++;
-                if (s.charCodeAt(0) === 64) {
-                    parseResponseFile(s.slice(1));
-                }
-                else if (s.charCodeAt(0) === 45) {
-                    s = s.slice(s.charCodeAt(1) === 45 ? 2 : 1).toLowerCase();
-                    if (ts.hasProperty(shortOptionNames, s)) {
-                        s = shortOptionNames[s];
-                    }
-                    if (ts.hasProperty(optionNameMap, s)) {
-                        var opt = optionNameMap[s];
-                        if (opt.isTSConfigOnly) {
-                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
-                        }
-                        else {
-                            if (!args[i] && opt.type !== "boolean") {
-                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
-                            }
-                            switch (opt.type) {
-                                case "number":
-                                    options[opt.name] = parseInt(args[i]);
-                                    i++;
-                                    break;
-                                case "boolean":
-                                    options[opt.name] = true;
-                                    break;
-                                case "string":
-                                    options[opt.name] = args[i] || "";
-                                    i++;
-                                    break;
-                                case "list":
-                                    options[opt.name] = parseListTypeOption(opt, args[i], errors);
-                                    i++;
-                                    break;
-                                default:
-                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
-                                    i++;
-                                    break;
-                            }
-                        }
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
-                    }
-                }
-                else {
-                    fileNames.push(s);
-                }
-            }
-        }
-        function parseResponseFile(fileName) {
-            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
-            if (!text) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
-                return;
-            }
-            var args = [];
-            var pos = 0;
-            while (true) {
-                while (pos < text.length && text.charCodeAt(pos) <= 32)
-                    pos++;
-                if (pos >= text.length)
-                    break;
-                var start = pos;
-                if (text.charCodeAt(start) === 34) {
-                    pos++;
-                    while (pos < text.length && text.charCodeAt(pos) !== 34)
-                        pos++;
-                    if (pos < text.length) {
-                        args.push(text.substring(start + 1, pos));
-                        pos++;
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
-                    }
-                }
-                else {
-                    while (text.charCodeAt(pos) > 32)
-                        pos++;
-                    args.push(text.substring(start, pos));
-                }
-            }
-            parseStrings(args);
-        }
-    }
-    ts.parseCommandLine = parseCommandLine;
-    function readConfigFile(fileName, readFile) {
-        var text = "";
-        try {
-            text = readFile(fileName);
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
-        }
-        return parseConfigFileTextToJson(fileName, text);
-    }
-    ts.readConfigFile = readConfigFile;
-    function parseConfigFileTextToJson(fileName, jsonText) {
-        try {
-            var jsonTextWithoutComments = removeComments(jsonText);
-            return { config: /\S/.test(jsonTextWithoutComments) ? JSON.parse(jsonTextWithoutComments) : {} };
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) };
-        }
-    }
-    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
-    function removeComments(jsonText) {
-        var output = "";
-        var scanner = ts.createScanner(1, false, 0, jsonText);
-        var token;
-        while ((token = scanner.scan()) !== 1) {
-            switch (token) {
-                case 2:
-                case 3:
-                    output += scanner.getTokenText().replace(/\S/g, " ");
-                    break;
-                default:
-                    output += scanner.getTokenText();
-                    break;
-            }
-        }
-        return output;
-    }
-    var IgnoreFileNamePattern = /(\.min\.js$)|([\\/]\.[\w.])/;
-    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName) {
-        if (existingOptions === void 0) { existingOptions = {}; }
-        var errors = [];
-        var compilerOptions = convertCompilerOptionsFromJsonWorker(json["compilerOptions"], basePath, errors, configFileName);
-        var options = ts.extend(existingOptions, compilerOptions);
-        var typingOptions = convertTypingOptionsFromJsonWorker(json["typingOptions"], basePath, errors, configFileName);
-        options.configFilePath = configFileName;
-        var fileNames = getFileNames(errors);
-        return {
-            options: options,
-            fileNames: fileNames,
-            typingOptions: typingOptions,
-            raw: json,
-            errors: errors
-        };
-        function getFileNames(errors) {
-            var fileNames = [];
-            if (ts.hasProperty(json, "files")) {
-                if (ts.isArray(json["files"])) {
-                    fileNames = ts.map(json["files"], function (s) { return ts.combinePaths(basePath, s); });
-                }
-                else {
-                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
-                }
-            }
-            else {
-                var filesSeen = {};
-                var exclude = [];
-                if (ts.isArray(json["exclude"])) {
-                    exclude = json["exclude"];
-                }
-                else {
-                    exclude = ["node_modules", "bower_components", "jspm_packages"];
-                }
-                var outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
-                if (outDir) {
-                    exclude.push(outDir);
-                }
-                exclude = ts.map(exclude, ts.normalizeSlashes);
-                var supportedExtensions = ts.getSupportedExtensions(options);
-                ts.Debug.assert(ts.indexOf(supportedExtensions, ".ts") < ts.indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
-                for (var _i = 0, supportedExtensions_1 = supportedExtensions; _i < supportedExtensions_1.length; _i++) {
-                    var extension = supportedExtensions_1[_i];
-                    var filesInDirWithExtension = host.readDirectory(basePath, extension, exclude);
-                    for (var _a = 0, filesInDirWithExtension_1 = filesInDirWithExtension; _a < filesInDirWithExtension_1.length; _a++) {
-                        var fileName = filesInDirWithExtension_1[_a];
-                        if (extension === ".ts" && ts.fileExtensionIs(fileName, ".d.ts")) {
-                            continue;
-                        }
-                        if (IgnoreFileNamePattern.test(fileName)) {
-                            continue;
-                        }
-                        if (extension === ".d.ts" || (options.allowJs && ts.contains(ts.supportedJavascriptExtensions, extension))) {
-                            var baseName = fileName.substr(0, fileName.length - extension.length);
-                            if (ts.hasProperty(filesSeen, baseName + ".ts") || ts.hasProperty(filesSeen, baseName + ".tsx")) {
-                                continue;
-                            }
-                        }
-                        filesSeen[fileName] = true;
-                        fileNames.push(fileName);
-                    }
-                }
-            }
-            if (ts.hasProperty(json, "excludes") && !ts.hasProperty(json, "exclude")) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
-            }
-            return fileNames;
-        }
-    }
-    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
-    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
-    }
-    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
-    function convertTypingOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
-    }
-    ts.convertTypingOptionsFromJson = convertTypingOptionsFromJson;
-    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json" ? { allowJs: true } : {};
-        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
-        return options;
-    }
-    function convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
-            ? { enableAutoDiscovery: true, include: [], exclude: [] }
-            : { enableAutoDiscovery: false, include: [], exclude: [] };
-        convertOptionsFromJson(ts.typingOptionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_typing_option_0, errors);
-        return options;
-    }
-    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
-        if (!jsonOptions) {
-            return;
-        }
-        var optionNameMap = ts.arrayToMap(optionDeclarations, function (opt) { return opt.name; });
-        for (var id in jsonOptions) {
-            if (ts.hasProperty(optionNameMap, id)) {
-                var opt = optionNameMap[id];
-                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
-            }
-            else {
-                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
-            }
-        }
-    }
-    function convertJsonOption(opt, value, basePath, errors) {
-        var optType = opt.type;
-        var expectedType = typeof optType === "string" ? optType : "string";
-        if (optType === "list" && ts.isArray(value)) {
-            return convertJsonOptionOfListType(opt, value, basePath, errors);
-        }
-        else if (typeof value === expectedType) {
-            if (typeof optType !== "string") {
-                return convertJsonOptionOfCustomType(opt, value, errors);
-            }
-            else {
-                if (opt.isFilePath) {
-                    value = ts.normalizePath(ts.combinePaths(basePath, value));
-                    if (value === "") {
-                        value = ".";
-                    }
-                }
-            }
-            return value;
-        }
-        else {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, expectedType));
-        }
-    }
-    function convertJsonOptionOfCustomType(opt, value, errors) {
-        var key = value.toLowerCase();
-        if (ts.hasProperty(opt.type, key)) {
-            return opt.type[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
-    }
-    function convertJsonOptionOfListType(option, values, basePath, errors) {
-        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
-    }
-    function trimString(s) {
-        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
-    }
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getDeclarationOfKind(symbol, kind) {
-        var declarations = symbol.declarations;
-        if (declarations) {
-            for (var _i = 0, declarations_1 = declarations; _i < declarations_1.length; _i++) {
-                var declaration = declarations_1[_i];
-                if (declaration.kind === kind) {
-                    return declaration;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getDeclarationOfKind = getDeclarationOfKind;
-    var stringWriters = [];
-    function getSingleLineStringWriter() {
-        if (stringWriters.length === 0) {
-            var str_1 = "";
-            var writeText = function (text) { return str_1 += text; };
-            return {
-                string: function () { return str_1; },
-                writeKeyword: writeText,
-                writeOperator: writeText,
-                writePunctuation: writeText,
-                writeSpace: writeText,
-                writeStringLiteral: writeText,
-                writeParameter: writeText,
-                writeSymbol: writeText,
-                writeLine: function () { return str_1 += " "; },
-                increaseIndent: function () { },
-                decreaseIndent: function () { },
-                clear: function () { return str_1 = ""; },
-                trackSymbol: function () { },
-                reportInaccessibleThisError: function () { }
-            };
-        }
-        return stringWriters.pop();
-    }
-    ts.getSingleLineStringWriter = getSingleLineStringWriter;
-    function releaseStringWriter(writer) {
-        writer.clear();
-        stringWriters.push(writer);
-    }
-    ts.releaseStringWriter = releaseStringWriter;
-    function getFullWidth(node) {
-        return node.end - node.pos;
-    }
-    ts.getFullWidth = getFullWidth;
-    function mapIsEqualTo(map1, map2) {
-        if (!map1 || !map2) {
-            return map1 === map2;
-        }
-        return containsAll(map1, map2) && containsAll(map2, map1);
-    }
-    ts.mapIsEqualTo = mapIsEqualTo;
-    function containsAll(map, other) {
-        for (var key in map) {
-            if (!ts.hasProperty(map, key)) {
-                continue;
-            }
-            if (!ts.hasProperty(other, key) || map[key] !== other[key]) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function arrayIsEqualTo(array1, array2, equaler) {
-        if (!array1 || !array2) {
-            return array1 === array2;
-        }
-        if (array1.length !== array2.length) {
-            return false;
-        }
-        for (var i = 0; i < array1.length; i++) {
-            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
-            if (!equals) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.arrayIsEqualTo = arrayIsEqualTo;
-    function hasResolvedModule(sourceFile, moduleNameText) {
-        return sourceFile.resolvedModules && ts.hasProperty(sourceFile.resolvedModules, moduleNameText);
-    }
-    ts.hasResolvedModule = hasResolvedModule;
-    function getResolvedModule(sourceFile, moduleNameText) {
-        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
-    }
-    ts.getResolvedModule = getResolvedModule;
-    function setResolvedModule(sourceFile, moduleNameText, resolvedModule) {
-        if (!sourceFile.resolvedModules) {
-            sourceFile.resolvedModules = {};
-        }
-        sourceFile.resolvedModules[moduleNameText] = resolvedModule;
-    }
-    ts.setResolvedModule = setResolvedModule;
-    function setResolvedTypeReferenceDirective(sourceFile, typeReferenceDirectiveName, resolvedTypeReferenceDirective) {
-        if (!sourceFile.resolvedTypeReferenceDirectiveNames) {
-            sourceFile.resolvedTypeReferenceDirectiveNames = {};
-        }
-        sourceFile.resolvedTypeReferenceDirectiveNames[typeReferenceDirectiveName] = resolvedTypeReferenceDirective;
-    }
-    ts.setResolvedTypeReferenceDirective = setResolvedTypeReferenceDirective;
-    function moduleResolutionIsEqualTo(oldResolution, newResolution) {
-        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport;
-    }
-    ts.moduleResolutionIsEqualTo = moduleResolutionIsEqualTo;
-    function typeDirectiveIsEqualTo(oldResolution, newResolution) {
-        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.primary === newResolution.primary;
-    }
-    ts.typeDirectiveIsEqualTo = typeDirectiveIsEqualTo;
-    function hasChangesInResolutions(names, newResolutions, oldResolutions, comparer) {
-        if (names.length !== newResolutions.length) {
-            return false;
-        }
-        for (var i = 0; i < names.length; i++) {
-            var newResolution = newResolutions[i];
-            var oldResolution = oldResolutions && ts.hasProperty(oldResolutions, names[i]) ? oldResolutions[names[i]] : undefined;
-            var changed = oldResolution
-                ? !newResolution || !comparer(oldResolution, newResolution)
-                : newResolution;
-            if (changed) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.hasChangesInResolutions = hasChangesInResolutions;
-    function containsParseError(node) {
-        aggregateChildData(node);
-        return (node.flags & 268435456) !== 0;
-    }
-    ts.containsParseError = containsParseError;
-    function aggregateChildData(node) {
-        if (!(node.flags & 536870912)) {
-            var thisNodeOrAnySubNodesHasError = ((node.flags & 67108864) !== 0) ||
-                ts.forEachChild(node, containsParseError);
-            if (thisNodeOrAnySubNodesHasError) {
-                node.flags |= 268435456;
-            }
-            node.flags |= 536870912;
-        }
-    }
-    function getSourceFileOfNode(node) {
-        while (node && node.kind !== 256) {
-            node = node.parent;
-        }
-        return node;
-    }
-    ts.getSourceFileOfNode = getSourceFileOfNode;
-    function isStatementWithLocals(node) {
-        switch (node.kind) {
-            case 199:
-            case 227:
-            case 206:
-            case 207:
-            case 208:
-                return true;
-        }
-        return false;
-    }
-    ts.isStatementWithLocals = isStatementWithLocals;
-    function getStartPositionOfLine(line, sourceFile) {
-        ts.Debug.assert(line >= 0);
-        return ts.getLineStarts(sourceFile)[line];
-    }
-    ts.getStartPositionOfLine = getStartPositionOfLine;
-    function nodePosToString(node) {
-        var file = getSourceFileOfNode(node);
-        var loc = ts.getLineAndCharacterOfPosition(file, node.pos);
-        return file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + ")";
-    }
-    ts.nodePosToString = nodePosToString;
-    function getStartPosOfNode(node) {
-        return node.pos;
-    }
-    ts.getStartPosOfNode = getStartPosOfNode;
-    function getEndLinePosition(line, sourceFile) {
-        ts.Debug.assert(line >= 0);
-        var lineStarts = ts.getLineStarts(sourceFile);
-        var lineIndex = line;
-        var sourceText = sourceFile.text;
-        if (lineIndex + 1 === lineStarts.length) {
-            return sourceText.length - 1;
-        }
-        else {
-            var start = lineStarts[lineIndex];
-            var pos = lineStarts[lineIndex + 1] - 1;
-            ts.Debug.assert(ts.isLineBreak(sourceText.charCodeAt(pos)));
-            while (start <= pos && ts.isLineBreak(sourceText.charCodeAt(pos))) {
-                pos--;
-            }
-            return pos;
-        }
-    }
-    ts.getEndLinePosition = getEndLinePosition;
-    function nodeIsMissing(node) {
-        if (!node) {
-            return true;
-        }
-        return node.pos === node.end && node.pos >= 0 && node.kind !== 1;
-    }
-    ts.nodeIsMissing = nodeIsMissing;
-    function nodeIsPresent(node) {
-        return !nodeIsMissing(node);
-    }
-    ts.nodeIsPresent = nodeIsPresent;
-    function getTokenPosOfNode(node, sourceFile) {
-        if (nodeIsMissing(node)) {
-            return node.pos;
-        }
-        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
-    }
-    ts.getTokenPosOfNode = getTokenPosOfNode;
-    function getNonDecoratorTokenPosOfNode(node, sourceFile) {
-        if (nodeIsMissing(node) || !node.decorators) {
-            return getTokenPosOfNode(node, sourceFile);
-        }
-        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.decorators.end);
-    }
-    ts.getNonDecoratorTokenPosOfNode = getNonDecoratorTokenPosOfNode;
-    function getSourceTextOfNodeFromSourceFile(sourceFile, node, includeTrivia) {
-        if (includeTrivia === void 0) { includeTrivia = false; }
-        if (nodeIsMissing(node)) {
-            return "";
-        }
-        var text = sourceFile.text;
-        return text.substring(includeTrivia ? node.pos : ts.skipTrivia(text, node.pos), node.end);
-    }
-    ts.getSourceTextOfNodeFromSourceFile = getSourceTextOfNodeFromSourceFile;
-    function getTextOfNodeFromSourceText(sourceText, node) {
-        if (nodeIsMissing(node)) {
-            return "";
-        }
-        return sourceText.substring(ts.skipTrivia(sourceText, node.pos), node.end);
-    }
-    ts.getTextOfNodeFromSourceText = getTextOfNodeFromSourceText;
-    function getTextOfNode(node, includeTrivia) {
-        if (includeTrivia === void 0) { includeTrivia = false; }
-        return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
-    }
-    ts.getTextOfNode = getTextOfNode;
-    function escapeIdentifier(identifier) {
-        return identifier.length >= 2 && identifier.charCodeAt(0) === 95 && identifier.charCodeAt(1) === 95 ? "_" + identifier : identifier;
-    }
-    ts.escapeIdentifier = escapeIdentifier;
-    function unescapeIdentifier(identifier) {
-        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 && identifier.charCodeAt(1) === 95 && identifier.charCodeAt(2) === 95 ? identifier.substr(1) : identifier;
-    }
-    ts.unescapeIdentifier = unescapeIdentifier;
-    function makeIdentifierFromModuleName(moduleName) {
-        return ts.getBaseFileName(moduleName).replace(/^(\d)/, "_$1").replace(/\W/g, "_");
-    }
-    ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
-    function isBlockOrCatchScoped(declaration) {
-        return (getCombinedNodeFlags(declaration) & 3072) !== 0 ||
-            isCatchClauseVariableDeclaration(declaration);
-    }
-    ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
-    function isAmbientModule(node) {
-        return node && node.kind === 225 &&
-            (node.name.kind === 9 || isGlobalScopeAugmentation(node));
-    }
-    ts.isAmbientModule = isAmbientModule;
-    function isBlockScopedContainerTopLevel(node) {
-        return node.kind === 256 ||
-            node.kind === 225 ||
-            isFunctionLike(node) ||
-            isFunctionBlock(node);
-    }
-    ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
-    function isGlobalScopeAugmentation(module) {
-        return !!(module.flags & 131072);
-    }
-    ts.isGlobalScopeAugmentation = isGlobalScopeAugmentation;
-    function isExternalModuleAugmentation(node) {
-        if (!node || !isAmbientModule(node)) {
-            return false;
-        }
-        switch (node.parent.kind) {
-            case 256:
-                return ts.isExternalModule(node.parent);
-            case 226:
-                return isAmbientModule(node.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
-        }
-        return false;
-    }
-    ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
-    function getEnclosingBlockScopeContainer(node) {
-        var current = node.parent;
-        while (current) {
-            if (isFunctionLike(current)) {
-                return current;
-            }
-            switch (current.kind) {
-                case 256:
-                case 227:
-                case 252:
-                case 225:
-                case 206:
-                case 207:
-                case 208:
-                    return current;
-                case 199:
-                    if (!isFunctionLike(current.parent)) {
-                        return current;
-                    }
-            }
-            current = current.parent;
-        }
-    }
-    ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
-    function isCatchClauseVariableDeclaration(declaration) {
-        return declaration &&
-            declaration.kind === 218 &&
-            declaration.parent &&
-            declaration.parent.kind === 252;
-    }
-    ts.isCatchClauseVariableDeclaration = isCatchClauseVariableDeclaration;
-    function declarationNameToString(name) {
-        return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
-    }
-    ts.declarationNameToString = declarationNameToString;
-    function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
-        var sourceFile = getSourceFileOfNode(node);
-        var span = getErrorSpanForNode(sourceFile, node);
-        return ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2);
-    }
-    ts.createDiagnosticForNode = createDiagnosticForNode;
-    function createDiagnosticForNodeFromMessageChain(node, messageChain) {
-        var sourceFile = getSourceFileOfNode(node);
-        var span = getErrorSpanForNode(sourceFile, node);
-        return {
-            file: sourceFile,
-            start: span.start,
-            length: span.length,
-            code: messageChain.code,
-            category: messageChain.category,
-            messageText: messageChain.next ? messageChain : messageChain.messageText
-        };
-    }
-    ts.createDiagnosticForNodeFromMessageChain = createDiagnosticForNodeFromMessageChain;
-    function getSpanOfTokenAtPosition(sourceFile, pos) {
-        var scanner = ts.createScanner(sourceFile.languageVersion, true, sourceFile.languageVariant, sourceFile.text, undefined, pos);
-        scanner.scan();
-        var start = scanner.getTokenPos();
-        return ts.createTextSpanFromBounds(start, scanner.getTextPos());
-    }
-    ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
-    function getErrorSpanForArrowFunction(sourceFile, node) {
-        var pos = ts.skipTrivia(sourceFile.text, node.pos);
-        if (node.body && node.body.kind === 199) {
-            var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
-            var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
-            if (startLine < endLine) {
-                return ts.createTextSpan(pos, getEndLinePosition(startLine, sourceFile) - pos + 1);
-            }
-        }
-        return ts.createTextSpanFromBounds(pos, node.end);
-    }
-    function getErrorSpanForNode(sourceFile, node) {
-        var errorNode = node;
-        switch (node.kind) {
-            case 256:
-                var pos_1 = ts.skipTrivia(sourceFile.text, 0, false);
-                if (pos_1 === sourceFile.text.length) {
-                    return ts.createTextSpan(0, 0);
-                }
-                return getSpanOfTokenAtPosition(sourceFile, pos_1);
-            case 218:
-            case 169:
-            case 221:
-            case 192:
-            case 222:
-            case 225:
-            case 224:
-            case 255:
-            case 220:
-            case 179:
-            case 147:
-            case 149:
-            case 150:
-            case 223:
-                errorNode = node.name;
-                break;
-            case 180:
-                return getErrorSpanForArrowFunction(sourceFile, node);
-        }
-        if (errorNode === undefined) {
-            return getSpanOfTokenAtPosition(sourceFile, node.pos);
-        }
-        var pos = nodeIsMissing(errorNode)
-            ? errorNode.pos
-            : ts.skipTrivia(sourceFile.text, errorNode.pos);
-        return ts.createTextSpanFromBounds(pos, errorNode.end);
-    }
-    ts.getErrorSpanForNode = getErrorSpanForNode;
-    function isExternalOrCommonJsModule(file) {
-        return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
-    }
-    ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
-    function isDeclarationFile(file) {
-        return file.isDeclarationFile;
-    }
-    ts.isDeclarationFile = isDeclarationFile;
-    function isConstEnumDeclaration(node) {
-        return node.kind === 224 && isConst(node);
-    }
-    ts.isConstEnumDeclaration = isConstEnumDeclaration;
-    function walkUpBindingElementsAndPatterns(node) {
-        while (node && (node.kind === 169 || isBindingPattern(node))) {
-            node = node.parent;
-        }
-        return node;
-    }
-    function getCombinedNodeFlags(node) {
-        node = walkUpBindingElementsAndPatterns(node);
-        var flags = node.flags;
-        if (node.kind === 218) {
-            node = node.parent;
-        }
-        if (node && node.kind === 219) {
-            flags |= node.flags;
-            node = node.parent;
-        }
-        if (node && node.kind === 200) {
-            flags |= node.flags;
-        }
-        return flags;
-    }
-    ts.getCombinedNodeFlags = getCombinedNodeFlags;
-    function isConst(node) {
-        return !!(getCombinedNodeFlags(node) & 2048);
-    }
-    ts.isConst = isConst;
-    function isLet(node) {
-        return !!(getCombinedNodeFlags(node) & 1024);
-    }
-    ts.isLet = isLet;
-    function isSuperCallExpression(n) {
-        return n.kind === 174 && n.expression.kind === 95;
-    }
-    ts.isSuperCallExpression = isSuperCallExpression;
-    function isPrologueDirective(node) {
-        return node.kind === 202 && node.expression.kind === 9;
-    }
-    ts.isPrologueDirective = isPrologueDirective;
-    function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
-        return ts.getLeadingCommentRanges(sourceFileOfNode.text, node.pos);
-    }
-    ts.getLeadingCommentRangesOfNode = getLeadingCommentRangesOfNode;
-    function getLeadingCommentRangesOfNodeFromText(node, text) {
-        return ts.getLeadingCommentRanges(text, node.pos);
-    }
-    ts.getLeadingCommentRangesOfNodeFromText = getLeadingCommentRangesOfNodeFromText;
-    function getJsDocComments(node, sourceFileOfNode) {
-        return getJsDocCommentsFromText(node, sourceFileOfNode.text);
-    }
-    ts.getJsDocComments = getJsDocComments;
-    function getJsDocCommentsFromText(node, text) {
-        var commentRanges = (node.kind === 142 || node.kind === 141) ?
-            ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
-            getLeadingCommentRangesOfNodeFromText(node, text);
-        return ts.filter(commentRanges, isJsDocComment);
-        function isJsDocComment(comment) {
-            return text.charCodeAt(comment.pos + 1) === 42 &&
-                text.charCodeAt(comment.pos + 2) === 42 &&
-                text.charCodeAt(comment.pos + 3) !== 47;
-        }
-    }
-    ts.getJsDocCommentsFromText = getJsDocCommentsFromText;
-    ts.fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
-    ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx = /^(\/\/\/\s*<reference\s+types\s*=\s*)('|")(.+?)\2.*?\/>/;
-    ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
-    function isTypeNode(node) {
-        if (154 <= node.kind && node.kind <= 166) {
-            return true;
-        }
-        switch (node.kind) {
-            case 117:
-            case 130:
-            case 132:
-            case 120:
-            case 133:
-            case 135:
-            case 127:
-                return true;
-            case 103:
-                return node.parent.kind !== 183;
-            case 194:
-                return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
-            case 69:
-                if (node.parent.kind === 139 && node.parent.right === node) {
-                    node = node.parent;
-                }
-                else if (node.parent.kind === 172 && node.parent.name === node) {
-                    node = node.parent;
-                }
-                ts.Debug.assert(node.kind === 69 || node.kind === 139 || node.kind === 172, "'node' was expected to be a qualified name, identifier or property access in 'isTypeNode'.");
-            case 139:
-            case 172:
-            case 97:
-                var parent_1 = node.parent;
-                if (parent_1.kind === 158) {
-                    return false;
-                }
-                if (154 <= parent_1.kind && parent_1.kind <= 166) {
-                    return true;
-                }
-                switch (parent_1.kind) {
-                    case 194:
-                        return !isExpressionWithTypeArgumentsInClassExtendsClause(parent_1);
-                    case 141:
-                        return node === parent_1.constraint;
-                    case 145:
-                    case 144:
-                    case 142:
-                    case 218:
-                        return node === parent_1.type;
-                    case 220:
-                    case 179:
-                    case 180:
-                    case 148:
-                    case 147:
-                    case 146:
-                    case 149:
-                    case 150:
-                        return node === parent_1.type;
-                    case 151:
-                    case 152:
-                    case 153:
-                        return node === parent_1.type;
-                    case 177:
-                        return node === parent_1.type;
-                    case 174:
-                    case 175:
-                        return parent_1.typeArguments && ts.indexOf(parent_1.typeArguments, node) >= 0;
-                    case 176:
-                        return false;
-                }
-        }
-        return false;
-    }
-    ts.isTypeNode = isTypeNode;
-    function forEachReturnStatement(body, visitor) {
-        return traverse(body);
-        function traverse(node) {
-            switch (node.kind) {
-                case 211:
-                    return visitor(node);
-                case 227:
-                case 199:
-                case 203:
-                case 204:
-                case 205:
-                case 206:
-                case 207:
-                case 208:
-                case 212:
-                case 213:
-                case 249:
-                case 250:
-                case 214:
-                case 216:
-                case 252:
-                    return ts.forEachChild(node, traverse);
-            }
-        }
-    }
-    ts.forEachReturnStatement = forEachReturnStatement;
-    function forEachYieldExpression(body, visitor) {
-        return traverse(body);
-        function traverse(node) {
-            switch (node.kind) {
-                case 190:
-                    visitor(node);
-                    var operand = node.expression;
-                    if (operand) {
-                        traverse(operand);
-                    }
-                case 224:
-                case 222:
-                case 225:
-                case 223:
-                case 221:
-                case 192:
-                    return;
-                default:
-                    if (isFunctionLike(node)) {
-                        var name_5 = node.name;
-                        if (name_5 && name_5.kind === 140) {
-                            traverse(name_5.expression);
-                            return;
-                        }
-                    }
-                    else if (!isTypeNode(node)) {
-                        ts.forEachChild(node, traverse);
-                    }
-            }
-        }
-    }
-    ts.forEachYieldExpression = forEachYieldExpression;
-    function isVariableLike(node) {
-        if (node) {
-            switch (node.kind) {
-                case 169:
-                case 255:
-                case 142:
-                case 253:
-                case 145:
-                case 144:
-                case 254:
-                case 218:
-                    return true;
-            }
-        }
-        return false;
-    }
-    ts.isVariableLike = isVariableLike;
-    function isAccessor(node) {
-        return node && (node.kind === 149 || node.kind === 150);
-    }
-    ts.isAccessor = isAccessor;
-    function isClassLike(node) {
-        return node && (node.kind === 221 || node.kind === 192);
-    }
-    ts.isClassLike = isClassLike;
-    function isFunctionLike(node) {
-        return node && isFunctionLikeKind(node.kind);
-    }
-    ts.isFunctionLike = isFunctionLike;
-    function isFunctionLikeKind(kind) {
-        switch (kind) {
-            case 148:
-            case 179:
-            case 220:
-            case 180:
-            case 147:
-            case 146:
-            case 149:
-            case 150:
-            case 151:
-            case 152:
-            case 153:
-            case 156:
-            case 157:
-                return true;
-        }
-    }
-    ts.isFunctionLikeKind = isFunctionLikeKind;
-    function introducesArgumentsExoticObject(node) {
-        switch (node.kind) {
-            case 147:
-            case 146:
-            case 148:
-            case 149:
-            case 150:
-            case 220:
-            case 179:
-                return true;
-        }
-        return false;
-    }
-    ts.introducesArgumentsExoticObject = introducesArgumentsExoticObject;
-    function isIterationStatement(node, lookInLabeledStatements) {
-        switch (node.kind) {
-            case 206:
-            case 207:
-            case 208:
-            case 204:
-            case 205:
-                return true;
-            case 214:
-                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
-        }
-        return false;
-    }
-    ts.isIterationStatement = isIterationStatement;
-    function isFunctionBlock(node) {
-        return node && node.kind === 199 && isFunctionLike(node.parent);
-    }
-    ts.isFunctionBlock = isFunctionBlock;
-    function isObjectLiteralMethod(node) {
-        return node && node.kind === 147 && node.parent.kind === 171;
-    }
-    ts.isObjectLiteralMethod = isObjectLiteralMethod;
-    function isIdentifierTypePredicate(predicate) {
-        return predicate && predicate.kind === 1;
-    }
-    ts.isIdentifierTypePredicate = isIdentifierTypePredicate;
-    function isThisTypePredicate(predicate) {
-        return predicate && predicate.kind === 0;
-    }
-    ts.isThisTypePredicate = isThisTypePredicate;
-    function getContainingFunction(node) {
-        while (true) {
-            node = node.parent;
-            if (!node || isFunctionLike(node)) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingFunction = getContainingFunction;
-    function getContainingFunctionOrModule(node) {
-        while (true) {
-            node = node.parent;
-            if (isFunctionLike(node) || node.kind === 225 || node.kind === 256) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingFunctionOrModule = getContainingFunctionOrModule;
-    function getContainingClass(node) {
-        while (true) {
-            node = node.parent;
-            if (!node || isClassLike(node)) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingClass = getContainingClass;
-    function getThisContainer(node, includeArrowFunctions) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return undefined;
-            }
-            switch (node.kind) {
-                case 140:
-                    if (isClassLike(node.parent.parent)) {
-                        return node;
-                    }
-                    node = node.parent;
-                    break;
-                case 143:
-                    if (node.parent.kind === 142 && isClassElement(node.parent.parent)) {
-                        node = node.parent.parent;
-                    }
-                    else if (isClassElement(node.parent)) {
-                        node = node.parent;
-                    }
-                    break;
-                case 180:
-                    if (!includeArrowFunctions) {
-                        continue;
-                    }
-                case 220:
-                case 179:
-                case 225:
-                case 145:
-                case 144:
-                case 147:
-                case 146:
-                case 148:
-                case 149:
-                case 150:
-                case 151:
-                case 152:
-                case 153:
-                case 224:
-                case 256:
-                    return node;
-            }
-        }
-    }
-    ts.getThisContainer = getThisContainer;
-    function getSuperContainer(node, stopOnFunctions) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return node;
-            }
-            switch (node.kind) {
-                case 140:
-                    node = node.parent;
-                    break;
-                case 220:
-                case 179:
-                case 180:
-                    if (!stopOnFunctions) {
-                        continue;
-                    }
-                case 145:
-                case 144:
-                case 147:
-                case 146:
-                case 148:
-                case 149:
-                case 150:
-                    return node;
-                case 143:
-                    if (node.parent.kind === 142 && isClassElement(node.parent.parent)) {
-                        node = node.parent.parent;
-                    }
-                    else if (isClassElement(node.parent)) {
-                        node = node.parent;
-                    }
-                    break;
-            }
-        }
-    }
-    ts.getSuperContainer = getSuperContainer;
-    function isSuperPropertyOrElementAccess(node) {
-        return (node.kind === 172
-            || node.kind === 173)
-            && node.expression.kind === 95;
-    }
-    ts.isSuperPropertyOrElementAccess = isSuperPropertyOrElementAccess;
-    function getEntityNameFromTypeNode(node) {
-        if (node) {
-            switch (node.kind) {
-                case 155:
-                    return node.typeName;
-                case 194:
-                    return node.expression;
-                case 69:
-                case 139:
-                    return node;
-            }
-        }
-        return undefined;
-    }
-    ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
-    function getInvokedExpression(node) {
-        if (node.kind === 176) {
-            return node.tag;
-        }
-        return node.expression;
-    }
-    ts.getInvokedExpression = getInvokedExpression;
-    function nodeCanBeDecorated(node) {
-        switch (node.kind) {
-            case 221:
-                return true;
-            case 145:
-                return node.parent.kind === 221;
-            case 149:
-            case 150:
-            case 147:
-                return node.body !== undefined
-                    && node.parent.kind === 221;
-            case 142:
-                return node.parent.body !== undefined
-                    && (node.parent.kind === 148
-                        || node.parent.kind === 147
-                        || node.parent.kind === 150)
-                    && node.parent.parent.kind === 221;
-        }
-        return false;
-    }
-    ts.nodeCanBeDecorated = nodeCanBeDecorated;
-    function nodeIsDecorated(node) {
-        return node.decorators !== undefined
-            && nodeCanBeDecorated(node);
-    }
-    ts.nodeIsDecorated = nodeIsDecorated;
-    function isPropertyAccessExpression(node) {
-        return node.kind === 172;
-    }
-    ts.isPropertyAccessExpression = isPropertyAccessExpression;
-    function isElementAccessExpression(node) {
-        return node.kind === 173;
-    }
-    ts.isElementAccessExpression = isElementAccessExpression;
-    function isJSXTagName(node) {
-        var parent = node.parent;
-        if (parent.kind === 243 ||
-            parent.kind === 242 ||
-            parent.kind === 245) {
-            return parent.tagName === node;
-        }
-        return false;
-    }
-    ts.isJSXTagName = isJSXTagName;
-    function isExpression(node) {
-        switch (node.kind) {
-            case 97:
-            case 95:
-            case 93:
-            case 99:
-            case 84:
-            case 10:
-            case 170:
-            case 171:
-            case 172:
-            case 173:
-            case 174:
-            case 175:
-            case 176:
-            case 195:
-            case 177:
-            case 196:
-            case 178:
-            case 179:
-            case 192:
-            case 180:
-            case 183:
-            case 181:
-            case 182:
-            case 185:
-            case 186:
-            case 187:
-            case 188:
-            case 191:
-            case 189:
-            case 11:
-            case 193:
-            case 241:
-            case 242:
-            case 190:
-            case 184:
-                return true;
-            case 139:
-                while (node.parent.kind === 139) {
-                    node = node.parent;
-                }
-                return node.parent.kind === 158 || isJSXTagName(node);
-            case 69:
-                if (node.parent.kind === 158 || isJSXTagName(node)) {
-                    return true;
-                }
-            case 8:
-            case 9:
-            case 97:
-                var parent_2 = node.parent;
-                switch (parent_2.kind) {
-                    case 218:
-                    case 142:
-                    case 145:
-                    case 144:
-                    case 255:
-                    case 253:
-                    case 169:
-                        return parent_2.initializer === node;
-                    case 202:
-                    case 203:
-                    case 204:
-                    case 205:
-                    case 211:
-                    case 212:
-                    case 213:
-                    case 249:
-                    case 215:
-                    case 213:
-                        return parent_2.expression === node;
-                    case 206:
-                        var forStatement = parent_2;
-                        return (forStatement.initializer === node && forStatement.initializer.kind !== 219) ||
-                            forStatement.condition === node ||
-                            forStatement.incrementor === node;
-                    case 207:
-                    case 208:
-                        var forInStatement = parent_2;
-                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 219) ||
-                            forInStatement.expression === node;
-                    case 177:
-                    case 195:
-                        return node === parent_2.expression;
-                    case 197:
-                        return node === parent_2.expression;
-                    case 140:
-                        return node === parent_2.expression;
-                    case 143:
-                    case 248:
-                    case 247:
-                        return true;
-                    case 194:
-                        return parent_2.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent_2);
-                    default:
-                        if (isExpression(parent_2)) {
-                            return true;
-                        }
-                }
-        }
-        return false;
-    }
-    ts.isExpression = isExpression;
-    function isExternalModuleNameRelative(moduleName) {
-        return moduleName.substr(0, 2) === "./" || moduleName.substr(0, 3) === "../" || moduleName.substr(0, 2) === ".\\" || moduleName.substr(0, 3) === "..\\";
-    }
-    ts.isExternalModuleNameRelative = isExternalModuleNameRelative;
-    function isInstantiatedModule(node, preserveConstEnums) {
-        var moduleState = ts.getModuleInstanceState(node);
-        return moduleState === 1 ||
-            (preserveConstEnums && moduleState === 2);
-    }
-    ts.isInstantiatedModule = isInstantiatedModule;
-    function isExternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 && node.moduleReference.kind === 240;
-    }
-    ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
-    function getExternalModuleImportEqualsDeclarationExpression(node) {
-        ts.Debug.assert(isExternalModuleImportEqualsDeclaration(node));
-        return node.moduleReference.expression;
-    }
-    ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
-    function isInternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 && node.moduleReference.kind !== 240;
-    }
-    ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
-    function isSourceFileJavaScript(file) {
-        return isInJavaScriptFile(file);
-    }
-    ts.isSourceFileJavaScript = isSourceFileJavaScript;
-    function isInJavaScriptFile(node) {
-        return node && !!(node.flags & 134217728);
-    }
-    ts.isInJavaScriptFile = isInJavaScriptFile;
-    function isRequireCall(expression, checkArgumentIsStringLiteral) {
-        var isRequire = expression.kind === 174 &&
-            expression.expression.kind === 69 &&
-            expression.expression.text === "require" &&
-            expression.arguments.length === 1;
-        return isRequire && (!checkArgumentIsStringLiteral || expression.arguments[0].kind === 9);
-    }
-    ts.isRequireCall = isRequireCall;
-    function isSingleOrDoubleQuote(charCode) {
-        return charCode === 39 || charCode === 34;
-    }
-    ts.isSingleOrDoubleQuote = isSingleOrDoubleQuote;
-    function getSpecialPropertyAssignmentKind(expression) {
-        if (!isInJavaScriptFile(expression)) {
-            return 0;
-        }
-        if (expression.kind !== 187) {
-            return 0;
-        }
-        var expr = expression;
-        if (expr.operatorToken.kind !== 56 || expr.left.kind !== 172) {
-            return 0;
-        }
-        var lhs = expr.left;
-        if (lhs.expression.kind === 69) {
-            var lhsId = lhs.expression;
-            if (lhsId.text === "exports") {
-                return 1;
-            }
-            else if (lhsId.text === "module" && lhs.name.text === "exports") {
-                return 2;
-            }
-        }
-        else if (lhs.expression.kind === 97) {
-            return 4;
-        }
-        else if (lhs.expression.kind === 172) {
-            var innerPropertyAccess = lhs.expression;
-            if (innerPropertyAccess.expression.kind === 69) {
-                var innerPropertyAccessIdentifier = innerPropertyAccess.expression;
-                if (innerPropertyAccessIdentifier.text === "module" && innerPropertyAccess.name.text === "exports") {
-                    return 1;
-                }
-                if (innerPropertyAccess.name.text === "prototype") {
-                    return 3;
-                }
-            }
-        }
-        return 0;
-    }
-    ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
-    function getExternalModuleName(node) {
-        if (node.kind === 230) {
-            return node.moduleSpecifier;
-        }
-        if (node.kind === 229) {
-            var reference = node.moduleReference;
-            if (reference.kind === 240) {
-                return reference.expression;
-            }
-        }
-        if (node.kind === 236) {
-            return node.moduleSpecifier;
-        }
-        if (node.kind === 225 && node.name.kind === 9) {
-            return node.name;
-        }
-    }
-    ts.getExternalModuleName = getExternalModuleName;
-    function hasQuestionToken(node) {
-        if (node) {
-            switch (node.kind) {
-                case 142:
-                case 147:
-                case 146:
-                case 254:
-                case 253:
-                case 145:
-                case 144:
-                    return node.questionToken !== undefined;
-            }
-        }
-        return false;
-    }
-    ts.hasQuestionToken = hasQuestionToken;
-    function isJSDocConstructSignature(node) {
-        return node.kind === 269 &&
-            node.parameters.length > 0 &&
-            node.parameters[0].type.kind === 271;
-    }
-    ts.isJSDocConstructSignature = isJSDocConstructSignature;
-    function getJSDocTag(node, kind, checkParentVariableStatement) {
-        if (!node) {
-            return undefined;
-        }
-        var jsDocComment = getJSDocComment(node, checkParentVariableStatement);
-        if (!jsDocComment) {
-            return undefined;
-        }
-        for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-            var tag = _a[_i];
-            if (tag.kind === kind) {
-                return tag;
-            }
-        }
-    }
-    function getJSDocComment(node, checkParentVariableStatement) {
-        if (node.jsDocComment) {
-            return node.jsDocComment;
-        }
-        if (checkParentVariableStatement) {
-            var isInitializerOfVariableDeclarationInStatement = node.parent.kind === 218 &&
-                node.parent.initializer === node &&
-                node.parent.parent.parent.kind === 200;
-            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent : undefined;
-            if (variableStatementNode) {
-                return variableStatementNode.jsDocComment;
-            }
-            var parent_3 = node.parent;
-            var isSourceOfAssignmentExpressionStatement = parent_3 && parent_3.parent &&
-                parent_3.kind === 187 &&
-                parent_3.operatorToken.kind === 56 &&
-                parent_3.parent.kind === 202;
-            if (isSourceOfAssignmentExpressionStatement) {
-                return parent_3.parent.jsDocComment;
-            }
-            var isPropertyAssignmentExpression = parent_3 && parent_3.kind === 253;
-            if (isPropertyAssignmentExpression) {
-                return parent_3.jsDocComment;
-            }
-        }
-        return undefined;
-    }
-    function getJSDocTypeTag(node) {
-        return getJSDocTag(node, 277, false);
-    }
-    ts.getJSDocTypeTag = getJSDocTypeTag;
-    function getJSDocReturnTag(node) {
-        return getJSDocTag(node, 276, true);
-    }
-    ts.getJSDocReturnTag = getJSDocReturnTag;
-    function getJSDocTemplateTag(node) {
-        return getJSDocTag(node, 278, false);
-    }
-    ts.getJSDocTemplateTag = getJSDocTemplateTag;
-    function getCorrespondingJSDocParameterTag(parameter) {
-        if (parameter.name && parameter.name.kind === 69) {
-            var parameterName = parameter.name.text;
-            var jsDocComment = getJSDocComment(parameter.parent, true);
-            if (jsDocComment) {
-                for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-                    var tag = _a[_i];
-                    if (tag.kind === 275) {
-                        var parameterTag = tag;
-                        var name_6 = parameterTag.preParameterName || parameterTag.postParameterName;
-                        if (name_6.text === parameterName) {
-                            return parameterTag;
-                        }
-                    }
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getCorrespondingJSDocParameterTag = getCorrespondingJSDocParameterTag;
-    function hasRestParameter(s) {
-        return isRestParameter(ts.lastOrUndefined(s.parameters));
-    }
-    ts.hasRestParameter = hasRestParameter;
-    function hasDeclaredRestParameter(s) {
-        return isDeclaredRestParam(ts.lastOrUndefined(s.parameters));
-    }
-    ts.hasDeclaredRestParameter = hasDeclaredRestParameter;
-    function isRestParameter(node) {
-        if (node && (node.flags & 134217728)) {
-            if (node.type && node.type.kind === 270) {
-                return true;
-            }
-            var paramTag = getCorrespondingJSDocParameterTag(node);
-            if (paramTag && paramTag.typeExpression) {
-                return paramTag.typeExpression.type.kind === 270;
-            }
-        }
-        return isDeclaredRestParam(node);
-    }
-    ts.isRestParameter = isRestParameter;
-    function isDeclaredRestParam(node) {
-        return node && node.dotDotDotToken !== undefined;
-    }
-    ts.isDeclaredRestParam = isDeclaredRestParam;
-    function isLiteralKind(kind) {
-        return 8 <= kind && kind <= 11;
-    }
-    ts.isLiteralKind = isLiteralKind;
-    function isTextualLiteralKind(kind) {
-        return kind === 9 || kind === 11;
-    }
-    ts.isTextualLiteralKind = isTextualLiteralKind;
-    function isTemplateLiteralKind(kind) {
-        return 11 <= kind && kind <= 14;
-    }
-    ts.isTemplateLiteralKind = isTemplateLiteralKind;
-    function isBindingPattern(node) {
-        return !!node && (node.kind === 168 || node.kind === 167);
-    }
-    ts.isBindingPattern = isBindingPattern;
-    function isAssignmentTarget(node) {
-        while (node.parent.kind === 178) {
-            node = node.parent;
-        }
-        while (true) {
-            var parent_4 = node.parent;
-            if (parent_4.kind === 170 || parent_4.kind === 191) {
-                node = parent_4;
-                continue;
-            }
-            if (parent_4.kind === 253 || parent_4.kind === 254) {
-                node = parent_4.parent;
-                continue;
-            }
-            return parent_4.kind === 187 &&
-                parent_4.operatorToken.kind === 56 &&
-                parent_4.left === node ||
-                (parent_4.kind === 207 || parent_4.kind === 208) &&
-                    parent_4.initializer === node;
-        }
-    }
-    ts.isAssignmentTarget = isAssignmentTarget;
-    function isNodeDescendentOf(node, ancestor) {
-        while (node) {
-            if (node === ancestor)
-                return true;
-            node = node.parent;
-        }
-        return false;
-    }
-    ts.isNodeDescendentOf = isNodeDescendentOf;
-    function isInAmbientContext(node) {
-        while (node) {
-            if (node.flags & 2 || (node.kind === 256 && node.isDeclarationFile)) {
-                return true;
-            }
-            node = node.parent;
-        }
-        return false;
-    }
-    ts.isInAmbientContext = isInAmbientContext;
-    function isDeclaration(node) {
-        switch (node.kind) {
-            case 180:
-            case 169:
-            case 221:
-            case 192:
-            case 148:
-            case 224:
-            case 255:
-            case 238:
-            case 220:
-            case 179:
-            case 149:
-            case 231:
-            case 229:
-            case 234:
-            case 222:
-            case 147:
-            case 146:
-            case 225:
-            case 232:
-            case 142:
-            case 253:
-            case 145:
-            case 144:
-            case 150:
-            case 254:
-            case 223:
-            case 141:
-            case 218:
-                return true;
-        }
-        return false;
-    }
-    ts.isDeclaration = isDeclaration;
-    function isStatement(n) {
-        switch (n.kind) {
-            case 210:
-            case 209:
-            case 217:
-            case 204:
-            case 202:
-            case 201:
-            case 207:
-            case 208:
-            case 206:
-            case 203:
-            case 214:
-            case 211:
-            case 213:
-            case 215:
-            case 216:
-            case 200:
-            case 205:
-            case 212:
-            case 235:
-                return true;
-            default:
-                return false;
-        }
-    }
-    ts.isStatement = isStatement;
-    function isClassElement(n) {
-        switch (n.kind) {
-            case 148:
-            case 145:
-            case 147:
-            case 149:
-            case 150:
-            case 146:
-            case 153:
-                return true;
-            default:
-                return false;
-        }
-    }
-    ts.isClassElement = isClassElement;
-    function isDeclarationName(name) {
-        if (name.kind !== 69 && name.kind !== 9 && name.kind !== 8) {
-            return false;
-        }
-        var parent = name.parent;
-        if (parent.kind === 234 || parent.kind === 238) {
-            if (parent.propertyName) {
-                return true;
-            }
-        }
-        if (isDeclaration(parent)) {
-            return parent.name === name;
-        }
-        return false;
-    }
-    ts.isDeclarationName = isDeclarationName;
-    function isLiteralComputedPropertyDeclarationName(node) {
-        return (node.kind === 9 || node.kind === 8) &&
-            node.parent.kind === 140 &&
-            isDeclaration(node.parent.parent);
-    }
-    ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
-    function isIdentifierName(node) {
-        var parent = node.parent;
-        switch (parent.kind) {
-            case 145:
-            case 144:
-            case 147:
-            case 146:
-            case 149:
-            case 150:
-            case 255:
-            case 253:
-            case 172:
-                return parent.name === node;
-            case 139:
-                if (parent.right === node) {
-                    while (parent.kind === 139) {
-                        parent = parent.parent;
-                    }
-                    return parent.kind === 158;
-                }
-                return false;
-            case 169:
-            case 234:
-                return parent.propertyName === node;
-            case 238:
-                return true;
-        }
-        return false;
-    }
-    ts.isIdentifierName = isIdentifierName;
-    function isAliasSymbolDeclaration(node) {
-        return node.kind === 229 ||
-            node.kind === 228 ||
-            node.kind === 231 && !!node.name ||
-            node.kind === 232 ||
-            node.kind === 234 ||
-            node.kind === 238 ||
-            node.kind === 235 && node.expression.kind === 69;
-    }
-    ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
-    function getClassExtendsHeritageClauseElement(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83);
-        return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
-    }
-    ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
-    function getClassImplementsHeritageClauseElements(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 106);
-        return heritageClause ? heritageClause.types : undefined;
-    }
-    ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
-    function getInterfaceBaseTypeNodes(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83);
-        return heritageClause ? heritageClause.types : undefined;
-    }
-    ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
-    function getHeritageClause(clauses, kind) {
-        if (clauses) {
-            for (var _i = 0, clauses_1 = clauses; _i < clauses_1.length; _i++) {
-                var clause = clauses_1[_i];
-                if (clause.token === kind) {
-                    return clause;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getHeritageClause = getHeritageClause;
-    function tryResolveScriptReference(host, sourceFile, reference) {
-        if (!host.getCompilerOptions().noResolve) {
-            var referenceFileName = ts.isRootedDiskPath(reference.fileName) ? reference.fileName : ts.combinePaths(ts.getDirectoryPath(sourceFile.fileName), reference.fileName);
-            return host.getSourceFile(referenceFileName);
-        }
-    }
-    ts.tryResolveScriptReference = tryResolveScriptReference;
-    function getAncestor(node, kind) {
-        while (node) {
-            if (node.kind === kind) {
-                return node;
-            }
-            node = node.parent;
-        }
-        return undefined;
-    }
-    ts.getAncestor = getAncestor;
-    function getFileReferenceFromReferencePath(comment, commentRange) {
-        var simpleReferenceRegEx = /^\/\/\/\s*<reference\s+/gim;
-        var isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
-        if (simpleReferenceRegEx.test(comment)) {
-            if (isNoDefaultLibRegEx.test(comment)) {
-                return {
-                    isNoDefaultLib: true
-                };
-            }
-            else {
-                var refMatchResult = ts.fullTripleSlashReferencePathRegEx.exec(comment);
-                var refLibResult = !refMatchResult && ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx.exec(comment);
-                if (refMatchResult || refLibResult) {
-                    var start = commentRange.pos;
-                    var end = commentRange.end;
-                    return {
-                        fileReference: {
-                            pos: start,
-                            end: end,
-                            fileName: (refMatchResult || refLibResult)[3]
-                        },
-                        isNoDefaultLib: false,
-                        isTypeReferenceDirective: !!refLibResult
-                    };
-                }
-                return {
-                    diagnosticMessage: ts.Diagnostics.Invalid_reference_directive_syntax,
-                    isNoDefaultLib: false
-                };
-            }
-        }
-        return undefined;
-    }
-    ts.getFileReferenceFromReferencePath = getFileReferenceFromReferencePath;
-    function isKeyword(token) {
-        return 70 <= token && token <= 138;
-    }
-    ts.isKeyword = isKeyword;
-    function isTrivia(token) {
-        return 2 <= token && token <= 7;
-    }
-    ts.isTrivia = isTrivia;
-    function isAsyncFunctionLike(node) {
-        return isFunctionLike(node) && (node.flags & 256) !== 0 && !isAccessor(node);
-    }
-    ts.isAsyncFunctionLike = isAsyncFunctionLike;
-    function isStringOrNumericLiteral(kind) {
-        return kind === 9 || kind === 8;
-    }
-    ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
-    function hasDynamicName(declaration) {
-        return declaration.name && isDynamicName(declaration.name);
-    }
-    ts.hasDynamicName = hasDynamicName;
-    function isDynamicName(name) {
-        return name.kind === 140 &&
-            !isStringOrNumericLiteral(name.expression.kind) &&
-            !isWellKnownSymbolSyntactically(name.expression);
-    }
-    ts.isDynamicName = isDynamicName;
-    function isWellKnownSymbolSyntactically(node) {
-        return isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
-    }
-    ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
-    function getPropertyNameForPropertyNameNode(name) {
-        if (name.kind === 69 || name.kind === 9 || name.kind === 8 || name.kind === 142) {
-            return name.text;
-        }
-        if (name.kind === 140) {
-            var nameExpression = name.expression;
-            if (isWellKnownSymbolSyntactically(nameExpression)) {
-                var rightHandSideName = nameExpression.name.text;
-                return getPropertyNameForKnownSymbolName(rightHandSideName);
-            }
-            else if (nameExpression.kind === 9 || nameExpression.kind === 8) {
-                return nameExpression.text;
-            }
-        }
-        return undefined;
-    }
-    ts.getPropertyNameForPropertyNameNode = getPropertyNameForPropertyNameNode;
-    function getPropertyNameForKnownSymbolName(symbolName) {
-        return "__@" + symbolName;
-    }
-    ts.getPropertyNameForKnownSymbolName = getPropertyNameForKnownSymbolName;
-    function isESSymbolIdentifier(node) {
-        return node.kind === 69 && node.text === "Symbol";
-    }
-    ts.isESSymbolIdentifier = isESSymbolIdentifier;
-    function isModifierKind(token) {
-        switch (token) {
-            case 115:
-            case 118:
-            case 74:
-            case 122:
-            case 77:
-            case 82:
-            case 112:
-            case 110:
-            case 111:
-            case 128:
-            case 113:
-                return true;
-        }
-        return false;
-    }
-    ts.isModifierKind = isModifierKind;
-    function isParameterDeclaration(node) {
-        var root = getRootDeclaration(node);
-        return root.kind === 142;
-    }
-    ts.isParameterDeclaration = isParameterDeclaration;
-    function getRootDeclaration(node) {
-        while (node.kind === 169) {
-            node = node.parent.parent;
-        }
-        return node;
-    }
-    ts.getRootDeclaration = getRootDeclaration;
-    function nodeStartsNewLexicalEnvironment(n) {
-        return isFunctionLike(n) || n.kind === 225 || n.kind === 256;
-    }
-    ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
-    function cloneNode(node, location, flags, parent) {
-        var clone = location !== undefined
-            ? ts.createNode(node.kind, location.pos, location.end)
-            : createSynthesizedNode(node.kind);
-        for (var key in node) {
-            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
-                continue;
-            }
-            clone[key] = node[key];
-        }
-        if (flags !== undefined) {
-            clone.flags = flags;
-        }
-        if (parent !== undefined) {
-            clone.parent = parent;
-        }
-        return clone;
-    }
-    ts.cloneNode = cloneNode;
-    function cloneEntityName(node, parent) {
-        var clone = cloneNode(node, node, node.flags, parent);
-        if (isQualifiedName(clone)) {
-            var left = clone.left, right = clone.right;
-            clone.left = cloneEntityName(left, clone);
-            clone.right = cloneNode(right, right, right.flags, parent);
-        }
-        return clone;
-    }
-    ts.cloneEntityName = cloneEntityName;
-    function isQualifiedName(node) {
-        return node.kind === 139;
-    }
-    ts.isQualifiedName = isQualifiedName;
-    function nodeIsSynthesized(node) {
-        return node.pos === -1;
-    }
-    ts.nodeIsSynthesized = nodeIsSynthesized;
-    function createSynthesizedNode(kind, startsOnNewLine) {
-        var node = ts.createNode(kind, -1, -1);
-        node.startsOnNewLine = startsOnNewLine;
-        return node;
-    }
-    ts.createSynthesizedNode = createSynthesizedNode;
-    function createSynthesizedNodeArray() {
-        var array = [];
-        array.pos = -1;
-        array.end = -1;
-        return array;
-    }
-    ts.createSynthesizedNodeArray = createSynthesizedNodeArray;
-    function createDiagnosticCollection() {
-        var nonFileDiagnostics = [];
-        var fileDiagnostics = {};
-        var diagnosticsModified = false;
-        var modificationCount = 0;
-        return {
-            add: add,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getDiagnostics: getDiagnostics,
-            getModificationCount: getModificationCount,
-            reattachFileDiagnostics: reattachFileDiagnostics
-        };
-        function getModificationCount() {
-            return modificationCount;
-        }
-        function reattachFileDiagnostics(newFile) {
-            if (!ts.hasProperty(fileDiagnostics, newFile.fileName)) {
-                return;
-            }
-            for (var _i = 0, _a = fileDiagnostics[newFile.fileName]; _i < _a.length; _i++) {
-                var diagnostic = _a[_i];
-                diagnostic.file = newFile;
-            }
-        }
-        function add(diagnostic) {
-            var diagnostics;
-            if (diagnostic.file) {
-                diagnostics = fileDiagnostics[diagnostic.file.fileName];
-                if (!diagnostics) {
-                    diagnostics = [];
-                    fileDiagnostics[diagnostic.file.fileName] = diagnostics;
-                }
-            }
-            else {
-                diagnostics = nonFileDiagnostics;
-            }
-            diagnostics.push(diagnostic);
-            diagnosticsModified = true;
-            modificationCount++;
-        }
-        function getGlobalDiagnostics() {
-            sortAndDeduplicate();
-            return nonFileDiagnostics;
-        }
-        function getDiagnostics(fileName) {
-            sortAndDeduplicate();
-            if (fileName) {
-                return fileDiagnostics[fileName] || [];
-            }
-            var allDiagnostics = [];
-            function pushDiagnostic(d) {
-                allDiagnostics.push(d);
-            }
-            ts.forEach(nonFileDiagnostics, pushDiagnostic);
-            for (var key in fileDiagnostics) {
-                if (ts.hasProperty(fileDiagnostics, key)) {
-                    ts.forEach(fileDiagnostics[key], pushDiagnostic);
-                }
-            }
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function sortAndDeduplicate() {
-            if (!diagnosticsModified) {
-                return;
-            }
-            diagnosticsModified = false;
-            nonFileDiagnostics = ts.sortAndDeduplicateDiagnostics(nonFileDiagnostics);
-            for (var key in fileDiagnostics) {
-                if (ts.hasProperty(fileDiagnostics, key)) {
-                    fileDiagnostics[key] = ts.sortAndDeduplicateDiagnostics(fileDiagnostics[key]);
-                }
-            }
-        }
-    }
-    ts.createDiagnosticCollection = createDiagnosticCollection;
-    var escapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
-    var escapedCharsMap = {
-        "\0": "\\0",
-        "\t": "\\t",
-        "\v": "\\v",
-        "\f": "\\f",
-        "\b": "\\b",
-        "\r": "\\r",
-        "\n": "\\n",
-        "\\": "\\\\",
-        "\"": "\\\"",
-        "\u2028": "\\u2028",
-        "\u2029": "\\u2029",
-        "\u0085": "\\u0085"
-    };
-    function escapeString(s) {
-        s = escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, getReplacement) : s;
-        return s;
-        function getReplacement(c) {
-            return escapedCharsMap[c] || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
-        }
-    }
-    ts.escapeString = escapeString;
-    function isIntrinsicJsxName(name) {
-        var ch = name.substr(0, 1);
-        return ch.toLowerCase() === ch;
-    }
-    ts.isIntrinsicJsxName = isIntrinsicJsxName;
-    function get16BitUnicodeEscapeSequence(charCode) {
-        var hexCharCode = charCode.toString(16).toUpperCase();
-        var paddedHexCode = ("0000" + hexCharCode).slice(-4);
-        return "\\u" + paddedHexCode;
-    }
-    var nonAsciiCharacters = /[^\u0000-\u007F]/g;
-    function escapeNonAsciiCharacters(s) {
-        return nonAsciiCharacters.test(s) ?
-            s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
-            s;
-    }
-    ts.escapeNonAsciiCharacters = escapeNonAsciiCharacters;
-    var indentStrings = ["", "    "];
-    function getIndentString(level) {
-        if (indentStrings[level] === undefined) {
-            indentStrings[level] = getIndentString(level - 1) + indentStrings[1];
-        }
-        return indentStrings[level];
-    }
-    ts.getIndentString = getIndentString;
-    function getIndentSize() {
-        return indentStrings[1].length;
-    }
-    ts.getIndentSize = getIndentSize;
-    function createTextWriter(newLine) {
-        var output;
-        var indent;
-        var lineStart;
-        var lineCount;
-        var linePos;
-        function write(s) {
-            if (s && s.length) {
-                if (lineStart) {
-                    output += getIndentString(indent);
-                    lineStart = false;
-                }
-                output += s;
-            }
-        }
-        function reset() {
-            output = "";
-            indent = 0;
-            lineStart = true;
-            lineCount = 0;
-            linePos = 0;
-        }
-        function rawWrite(s) {
-            if (s !== undefined) {
-                if (lineStart) {
-                    lineStart = false;
-                }
-                output += s;
-            }
-        }
-        function writeLiteral(s) {
-            if (s && s.length) {
-                write(s);
-                var lineStartsOfS = ts.computeLineStarts(s);
-                if (lineStartsOfS.length > 1) {
-                    lineCount = lineCount + lineStartsOfS.length - 1;
-                    linePos = output.length - s.length + ts.lastOrUndefined(lineStartsOfS);
-                }
-            }
-        }
-        function writeLine() {
-            if (!lineStart) {
-                output += newLine;
-                lineCount++;
-                linePos = output.length;
-                lineStart = true;
-            }
-        }
-        function writeTextOfNode(text, node) {
-            write(getTextOfNodeFromSourceText(text, node));
-        }
-        reset();
-        return {
-            write: write,
-            rawWrite: rawWrite,
-            writeTextOfNode: writeTextOfNode,
-            writeLiteral: writeLiteral,
-            writeLine: writeLine,
-            increaseIndent: function () { indent++; },
-            decreaseIndent: function () { indent--; },
-            getIndent: function () { return indent; },
-            getTextPos: function () { return output.length; },
-            getLine: function () { return lineCount + 1; },
-            getColumn: function () { return lineStart ? indent * getIndentSize() + 1 : output.length - linePos + 1; },
-            getText: function () { return output; },
-            reset: reset
-        };
-    }
-    ts.createTextWriter = createTextWriter;
-    function getExternalModuleNameFromPath(host, fileName) {
-        var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
-        var dir = ts.toPath(host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
-        var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
-        var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, false);
-        return ts.removeFileExtension(relativePath);
-    }
-    ts.getExternalModuleNameFromPath = getExternalModuleNameFromPath;
-    function getOwnEmitOutputFilePath(sourceFile, host, extension) {
-        var compilerOptions = host.getCompilerOptions();
-        var emitOutputFilePathWithoutExtension;
-        if (compilerOptions.outDir) {
-            emitOutputFilePathWithoutExtension = ts.removeFileExtension(getSourceFilePathInNewDir(sourceFile, host, compilerOptions.outDir));
-        }
-        else {
-            emitOutputFilePathWithoutExtension = ts.removeFileExtension(sourceFile.fileName);
-        }
-        return emitOutputFilePathWithoutExtension + extension;
-    }
-    ts.getOwnEmitOutputFilePath = getOwnEmitOutputFilePath;
-    function getDeclarationEmitOutputFilePath(sourceFile, host) {
-        var options = host.getCompilerOptions();
-        var outputDir = options.declarationDir || options.outDir;
-        if (options.declaration) {
-            var path = outputDir
-                ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
-                : sourceFile.fileName;
-            return ts.removeFileExtension(path) + ".d.ts";
-        }
-    }
-    ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
-    function getEmitScriptTarget(compilerOptions) {
-        return compilerOptions.target || 0;
-    }
-    ts.getEmitScriptTarget = getEmitScriptTarget;
-    function getEmitModuleKind(compilerOptions) {
-        return typeof compilerOptions.module === "number" ?
-            compilerOptions.module :
-            getEmitScriptTarget(compilerOptions) === 2 ? ts.ModuleKind.ES6 : ts.ModuleKind.CommonJS;
-    }
-    ts.getEmitModuleKind = getEmitModuleKind;
-    function forEachExpectedEmitFile(host, action, targetSourceFile) {
-        var options = host.getCompilerOptions();
-        if (options.outFile || options.out) {
-            onBundledEmit(host);
-        }
-        else {
-            var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
-            for (var _i = 0, sourceFiles_1 = sourceFiles; _i < sourceFiles_1.length; _i++) {
-                var sourceFile = sourceFiles_1[_i];
-                if (!isDeclarationFile(sourceFile)) {
-                    onSingleFileEmit(host, sourceFile);
-                }
-            }
-        }
-        function onSingleFileEmit(host, sourceFile) {
-            var extension = ".js";
-            if (options.jsx === 1) {
-                if (isSourceFileJavaScript(sourceFile)) {
-                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
-                        extension = ".jsx";
-                    }
-                }
-                else if (sourceFile.languageVariant === 1) {
-                    extension = ".jsx";
-                }
-            }
-            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
-            var emitFileNames = {
-                jsFilePath: jsFilePath,
-                sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                declarationFilePath: !isSourceFileJavaScript(sourceFile) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined
-            };
-            action(emitFileNames, [sourceFile], false);
-        }
-        function onBundledEmit(host) {
-            var bundledSources = ts.filter(host.getSourceFiles(), function (sourceFile) {
-                return !isDeclarationFile(sourceFile)
-                    && (!ts.isExternalModule(sourceFile) || !!getEmitModuleKind(options));
-            });
-            if (bundledSources.length) {
-                var jsFilePath = options.outFile || options.out;
-                var emitFileNames = {
-                    jsFilePath: jsFilePath,
-                    sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                    declarationFilePath: options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined
-                };
-                action(emitFileNames, bundledSources, true);
-            }
-        }
-        function getSourceMapFilePath(jsFilePath, options) {
-            return options.sourceMap ? jsFilePath + ".map" : undefined;
-        }
-    }
-    ts.forEachExpectedEmitFile = forEachExpectedEmitFile;
-    function getSourceFilePathInNewDir(sourceFile, host, newDirPath) {
-        var sourceFilePath = ts.getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
-        sourceFilePath = sourceFilePath.replace(host.getCommonSourceDirectory(), "");
-        return ts.combinePaths(newDirPath, sourceFilePath);
-    }
-    ts.getSourceFilePathInNewDir = getSourceFilePathInNewDir;
-    function writeFile(host, diagnostics, fileName, data, writeByteOrderMark, sourceFiles) {
-        host.writeFile(fileName, data, writeByteOrderMark, function (hostErrorMessage) {
-            diagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Could_not_write_file_0_Colon_1, fileName, hostErrorMessage));
-        }, sourceFiles);
-    }
-    ts.writeFile = writeFile;
-    function getLineOfLocalPosition(currentSourceFile, pos) {
-        return ts.getLineAndCharacterOfPosition(currentSourceFile, pos).line;
-    }
-    ts.getLineOfLocalPosition = getLineOfLocalPosition;
-    function getLineOfLocalPositionFromLineMap(lineMap, pos) {
-        return ts.computeLineAndCharacterOfPosition(lineMap, pos).line;
-    }
-    ts.getLineOfLocalPositionFromLineMap = getLineOfLocalPositionFromLineMap;
-    function getFirstConstructorWithBody(node) {
-        return ts.forEach(node.members, function (member) {
-            if (member.kind === 148 && nodeIsPresent(member.body)) {
-                return member;
-            }
-        });
-    }
-    ts.getFirstConstructorWithBody = getFirstConstructorWithBody;
-    function getSetAccessorTypeAnnotationNode(accessor) {
-        if (accessor && accessor.parameters.length > 0) {
-            var hasThis = accessor.parameters.length === 2 &&
-                accessor.parameters[0].name.kind === 69 &&
-                accessor.parameters[0].name.originalKeywordKind === 97;
-            return accessor.parameters[hasThis ? 1 : 0].type;
-        }
-    }
-    ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
-    function getAllAccessorDeclarations(declarations, accessor) {
-        var firstAccessor;
-        var secondAccessor;
-        var getAccessor;
-        var setAccessor;
-        if (hasDynamicName(accessor)) {
-            firstAccessor = accessor;
-            if (accessor.kind === 149) {
-                getAccessor = accessor;
-            }
-            else if (accessor.kind === 150) {
-                setAccessor = accessor;
-            }
-            else {
-                ts.Debug.fail("Accessor has wrong kind");
-            }
-        }
-        else {
-            ts.forEach(declarations, function (member) {
-                if ((member.kind === 149 || member.kind === 150)
-                    && (member.flags & 32) === (accessor.flags & 32)) {
-                    var memberName = getPropertyNameForPropertyNameNode(member.name);
-                    var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
-                    if (memberName === accessorName) {
-                        if (!firstAccessor) {
-                            firstAccessor = member;
-                        }
-                        else if (!secondAccessor) {
-                            secondAccessor = member;
-                        }
-                        if (member.kind === 149 && !getAccessor) {
-                            getAccessor = member;
-                        }
-                        if (member.kind === 150 && !setAccessor) {
-                            setAccessor = member;
-                        }
-                    }
-                }
-            });
-        }
-        return {
-            firstAccessor: firstAccessor,
-            secondAccessor: secondAccessor,
-            getAccessor: getAccessor,
-            setAccessor: setAccessor
-        };
-    }
-    ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
-    function emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments) {
-        if (leadingComments && leadingComments.length && node.pos !== leadingComments[0].pos &&
-            getLineOfLocalPositionFromLineMap(lineMap, node.pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
-            writer.writeLine();
-        }
-    }
-    ts.emitNewLineBeforeLeadingComments = emitNewLineBeforeLeadingComments;
-    function emitComments(text, lineMap, writer, comments, trailingSeparator, newLine, writeComment) {
-        var emitLeadingSpace = !trailingSeparator;
-        ts.forEach(comments, function (comment) {
-            if (emitLeadingSpace) {
-                writer.write(" ");
-                emitLeadingSpace = false;
-            }
-            writeComment(text, lineMap, writer, comment, newLine);
-            if (comment.hasTrailingNewLine) {
-                writer.writeLine();
-            }
-            else if (trailingSeparator) {
-                writer.write(" ");
-            }
-            else {
-                emitLeadingSpace = true;
-            }
-        });
-    }
-    ts.emitComments = emitComments;
-    function emitDetachedComments(text, lineMap, writer, writeComment, node, newLine, removeComments) {
-        var leadingComments;
-        var currentDetachedCommentInfo;
-        if (removeComments) {
-            if (node.pos === 0) {
-                leadingComments = ts.filter(ts.getLeadingCommentRanges(text, node.pos), isPinnedComment);
-            }
-        }
-        else {
-            leadingComments = ts.getLeadingCommentRanges(text, node.pos);
-        }
-        if (leadingComments) {
-            var detachedComments = [];
-            var lastComment = void 0;
-            for (var _i = 0, leadingComments_1 = leadingComments; _i < leadingComments_1.length; _i++) {
-                var comment = leadingComments_1[_i];
-                if (lastComment) {
-                    var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, lastComment.end);
-                    var commentLine = getLineOfLocalPositionFromLineMap(lineMap, comment.pos);
-                    if (commentLine >= lastCommentLine + 2) {
-                        break;
-                    }
-                }
-                detachedComments.push(comment);
-                lastComment = comment;
-            }
-            if (detachedComments.length) {
-                var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, ts.lastOrUndefined(detachedComments).end);
-                var nodeLine = getLineOfLocalPositionFromLineMap(lineMap, ts.skipTrivia(text, node.pos));
-                if (nodeLine >= lastCommentLine + 2) {
-                    emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments);
-                    emitComments(text, lineMap, writer, detachedComments, true, newLine, writeComment);
-                    currentDetachedCommentInfo = { nodePos: node.pos, detachedCommentEndPos: ts.lastOrUndefined(detachedComments).end };
-                }
-            }
-        }
-        return currentDetachedCommentInfo;
-        function isPinnedComment(comment) {
-            return text.charCodeAt(comment.pos + 1) === 42 &&
-                text.charCodeAt(comment.pos + 2) === 33;
-        }
-    }
-    ts.emitDetachedComments = emitDetachedComments;
-    function writeCommentRange(text, lineMap, writer, comment, newLine) {
-        if (text.charCodeAt(comment.pos + 1) === 42) {
-            var firstCommentLineAndCharacter = ts.computeLineAndCharacterOfPosition(lineMap, comment.pos);
-            var lineCount = lineMap.length;
-            var firstCommentLineIndent = void 0;
-            for (var pos = comment.pos, currentLine = firstCommentLineAndCharacter.line; pos < comment.end; currentLine++) {
-                var nextLineStart = (currentLine + 1) === lineCount
-                    ? text.length + 1
-                    : lineMap[currentLine + 1];
-                if (pos !== comment.pos) {
-                    if (firstCommentLineIndent === undefined) {
-                        firstCommentLineIndent = calculateIndent(text, lineMap[firstCommentLineAndCharacter.line], comment.pos);
-                    }
-                    var currentWriterIndentSpacing = writer.getIndent() * getIndentSize();
-                    var spacesToEmit = currentWriterIndentSpacing - firstCommentLineIndent + calculateIndent(text, pos, nextLineStart);
-                    if (spacesToEmit > 0) {
-                        var numberOfSingleSpacesToEmit = spacesToEmit % getIndentSize();
-                        var indentSizeSpaceString = getIndentString((spacesToEmit - numberOfSingleSpacesToEmit) / getIndentSize());
-                        writer.rawWrite(indentSizeSpaceString);
-                        while (numberOfSingleSpacesToEmit) {
-                            writer.rawWrite(" ");
-                            numberOfSingleSpacesToEmit--;
-                        }
-                    }
-                    else {
-                        writer.rawWrite("");
-                    }
-                }
-                writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart);
-                pos = nextLineStart;
-            }
-        }
-        else {
-            writer.write(text.substring(comment.pos, comment.end));
-        }
-    }
-    ts.writeCommentRange = writeCommentRange;
-    function writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart) {
-        var end = Math.min(comment.end, nextLineStart - 1);
-        var currentLineText = text.substring(pos, end).replace(/^\s+|\s+$/g, "");
-        if (currentLineText) {
-            writer.write(currentLineText);
-            if (end !== comment.end) {
-                writer.writeLine();
-            }
-        }
-        else {
-            writer.writeLiteral(newLine);
-        }
-    }
-    function calculateIndent(text, pos, end) {
-        var currentLineIndent = 0;
-        for (; pos < end && ts.isWhiteSpace(text.charCodeAt(pos)); pos++) {
-            if (text.charCodeAt(pos) === 9) {
-                currentLineIndent += getIndentSize() - (currentLineIndent % getIndentSize());
-            }
-            else {
-                currentLineIndent++;
-            }
-        }
-        return currentLineIndent;
-    }
-    function modifierToFlag(token) {
-        switch (token) {
-            case 113: return 32;
-            case 112: return 4;
-            case 111: return 16;
-            case 110: return 8;
-            case 115: return 128;
-            case 82: return 1;
-            case 122: return 2;
-            case 74: return 2048;
-            case 77: return 512;
-            case 118: return 256;
-            case 128: return 64;
-        }
-        return 0;
-    }
-    ts.modifierToFlag = modifierToFlag;
-    function isLeftHandSideExpression(expr) {
-        if (expr) {
-            switch (expr.kind) {
-                case 172:
-                case 173:
-                case 175:
-                case 174:
-                case 196:
-                case 241:
-                case 242:
-                case 176:
-                case 170:
-                case 178:
-                case 171:
-                case 192:
-                case 179:
-                case 69:
-                case 10:
-                case 8:
-                case 9:
-                case 11:
-                case 189:
-                case 84:
-                case 93:
-                case 97:
-                case 99:
-                case 95:
-                    return true;
-            }
-        }
-        return false;
-    }
-    ts.isLeftHandSideExpression = isLeftHandSideExpression;
-    function isAssignmentOperator(token) {
-        return token >= 56 && token <= 68;
-    }
-    ts.isAssignmentOperator = isAssignmentOperator;
-    function isExpressionWithTypeArgumentsInClassExtendsClause(node) {
-        return node.kind === 194 &&
-            node.parent.token === 83 &&
-            isClassLike(node.parent.parent);
-    }
-    ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
-    function isSupportedExpressionWithTypeArguments(node) {
-        return isSupportedExpressionWithTypeArgumentsRest(node.expression);
-    }
-    ts.isSupportedExpressionWithTypeArguments = isSupportedExpressionWithTypeArguments;
-    function isSupportedExpressionWithTypeArgumentsRest(node) {
-        if (node.kind === 69) {
-            return true;
-        }
-        else if (isPropertyAccessExpression(node)) {
-            return isSupportedExpressionWithTypeArgumentsRest(node.expression);
-        }
-        else {
-            return false;
-        }
-    }
-    function isRightSideOfQualifiedNameOrPropertyAccess(node) {
-        return (node.parent.kind === 139 && node.parent.right === node) ||
-            (node.parent.kind === 172 && node.parent.name === node);
-    }
-    ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
-    function isEmptyObjectLiteralOrArrayLiteral(expression) {
-        var kind = expression.kind;
-        if (kind === 171) {
-            return expression.properties.length === 0;
-        }
-        if (kind === 170) {
-            return expression.elements.length === 0;
-        }
-        return false;
-    }
-    ts.isEmptyObjectLiteralOrArrayLiteral = isEmptyObjectLiteralOrArrayLiteral;
-    function getLocalSymbolForExportDefault(symbol) {
-        return symbol && symbol.valueDeclaration && (symbol.valueDeclaration.flags & 512) ? symbol.valueDeclaration.localSymbol : undefined;
-    }
-    ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
-    function hasJavaScriptFileExtension(fileName) {
-        return ts.forEach(ts.supportedJavascriptExtensions, function (extension) { return ts.fileExtensionIs(fileName, extension); });
-    }
-    ts.hasJavaScriptFileExtension = hasJavaScriptFileExtension;
-    function getExpandedCharCodes(input) {
-        var output = [];
-        var length = input.length;
-        for (var i = 0; i < length; i++) {
-            var charCode = input.charCodeAt(i);
-            if (charCode < 0x80) {
-                output.push(charCode);
-            }
-            else if (charCode < 0x800) {
-                output.push((charCode >> 6) | 192);
-                output.push((charCode & 63) | 128);
-            }
-            else if (charCode < 0x10000) {
-                output.push((charCode >> 12) | 224);
-                output.push(((charCode >> 6) & 63) | 128);
-                output.push((charCode & 63) | 128);
-            }
-            else if (charCode < 0x20000) {
-                output.push((charCode >> 18) | 240);
-                output.push(((charCode >> 12) & 63) | 128);
-                output.push(((charCode >> 6) & 63) | 128);
-                output.push((charCode & 63) | 128);
-            }
-            else {
-                ts.Debug.assert(false, "Unexpected code point");
-            }
-        }
-        return output;
-    }
-    ts.stringify = typeof JSON !== "undefined" && JSON.stringify
-        ? JSON.stringify
-        : stringifyFallback;
-    function stringifyFallback(value) {
-        return value === undefined ? undefined : stringifyValue(value);
-    }
-    function stringifyValue(value) {
-        return typeof value === "string" ? "\"" + escapeString(value) + "\""
-            : typeof value === "number" ? isFinite(value) ? String(value) : "null"
-                : typeof value === "boolean" ? value ? "true" : "false"
-                    : typeof value === "object" && value ? ts.isArray(value) ? cycleCheck(stringifyArray, value) : cycleCheck(stringifyObject, value)
-                        : "null";
-    }
-    function cycleCheck(cb, value) {
-        ts.Debug.assert(!value.hasOwnProperty("__cycle"), "Converting circular structure to JSON");
-        value.__cycle = true;
-        var result = cb(value);
-        delete value.__cycle;
-        return result;
-    }
-    function stringifyArray(value) {
-        return "[" + ts.reduceLeft(value, stringifyElement, "") + "]";
-    }
-    function stringifyElement(memo, value) {
-        return (memo ? memo + "," : memo) + stringifyValue(value);
-    }
-    function stringifyObject(value) {
-        return "{" + ts.reduceProperties(value, stringifyProperty, "") + "}";
-    }
-    function stringifyProperty(memo, value, key) {
-        return value === undefined || typeof value === "function" || key === "__cycle" ? memo
-            : (memo ? memo + "," : memo) + ("\"" + escapeString(key) + "\":" + stringifyValue(value));
-    }
-    var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
-    function convertToBase64(input) {
-        var result = "";
-        var charCodes = getExpandedCharCodes(input);
-        var i = 0;
-        var length = charCodes.length;
-        var byte1, byte2, byte3, byte4;
-        while (i < length) {
-            byte1 = charCodes[i] >> 2;
-            byte2 = (charCodes[i] & 3) << 4 | charCodes[i + 1] >> 4;
-            byte3 = (charCodes[i + 1] & 15) << 2 | charCodes[i + 2] >> 6;
-            byte4 = charCodes[i + 2] & 63;
-            if (i + 1 >= length) {
-                byte3 = byte4 = 64;
-            }
-            else if (i + 2 >= length) {
-                byte4 = 64;
-            }
-            result += base64Digits.charAt(byte1) + base64Digits.charAt(byte2) + base64Digits.charAt(byte3) + base64Digits.charAt(byte4);
-            i += 3;
-        }
-        return result;
-    }
-    ts.convertToBase64 = convertToBase64;
-    function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
-        return !ts.isRootedDiskPath(absoluteOrRelativePath)
-            ? absoluteOrRelativePath
-            : ts.getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, false);
-    }
-    ts.convertToRelativePath = convertToRelativePath;
-    var carriageReturnLineFeed = "\r\n";
-    var lineFeed = "\n";
-    function getNewLineCharacter(options) {
-        if (options.newLine === 0) {
-            return carriageReturnLineFeed;
-        }
-        else if (options.newLine === 1) {
-            return lineFeed;
-        }
-        else if (ts.sys) {
-            return ts.sys.newLine;
-        }
-        return carriageReturnLineFeed;
-    }
-    ts.getNewLineCharacter = getNewLineCharacter;
-    function isWatchSet(options) {
-        return options.watch && options.hasOwnProperty("watch");
-    }
-    ts.isWatchSet = isWatchSet;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getDefaultLibFileName(options) {
-        return options.target === 2 ? "lib.es6.d.ts" : "lib.d.ts";
-    }
-    ts.getDefaultLibFileName = getDefaultLibFileName;
-    function textSpanEnd(span) {
-        return span.start + span.length;
-    }
-    ts.textSpanEnd = textSpanEnd;
-    function textSpanIsEmpty(span) {
-        return span.length === 0;
-    }
-    ts.textSpanIsEmpty = textSpanIsEmpty;
-    function textSpanContainsPosition(span, position) {
-        return position >= span.start && position < textSpanEnd(span);
-    }
-    ts.textSpanContainsPosition = textSpanContainsPosition;
-    function textSpanContainsTextSpan(span, other) {
-        return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
-    }
-    ts.textSpanContainsTextSpan = textSpanContainsTextSpan;
-    function textSpanOverlapsWith(span, other) {
-        var overlapStart = Math.max(span.start, other.start);
-        var overlapEnd = Math.min(textSpanEnd(span), textSpanEnd(other));
-        return overlapStart < overlapEnd;
-    }
-    ts.textSpanOverlapsWith = textSpanOverlapsWith;
-    function textSpanOverlap(span1, span2) {
-        var overlapStart = Math.max(span1.start, span2.start);
-        var overlapEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
-        if (overlapStart < overlapEnd) {
-            return createTextSpanFromBounds(overlapStart, overlapEnd);
-        }
-        return undefined;
-    }
-    ts.textSpanOverlap = textSpanOverlap;
-    function textSpanIntersectsWithTextSpan(span, other) {
-        return other.start <= textSpanEnd(span) && textSpanEnd(other) >= span.start;
-    }
-    ts.textSpanIntersectsWithTextSpan = textSpanIntersectsWithTextSpan;
-    function textSpanIntersectsWith(span, start, length) {
-        var end = start + length;
-        return start <= textSpanEnd(span) && end >= span.start;
-    }
-    ts.textSpanIntersectsWith = textSpanIntersectsWith;
-    function decodedTextSpanIntersectsWith(start1, length1, start2, length2) {
-        var end1 = start1 + length1;
-        var end2 = start2 + length2;
-        return start2 <= end1 && end2 >= start1;
-    }
-    ts.decodedTextSpanIntersectsWith = decodedTextSpanIntersectsWith;
-    function textSpanIntersectsWithPosition(span, position) {
-        return position <= textSpanEnd(span) && position >= span.start;
-    }
-    ts.textSpanIntersectsWithPosition = textSpanIntersectsWithPosition;
-    function textSpanIntersection(span1, span2) {
-        var intersectStart = Math.max(span1.start, span2.start);
-        var intersectEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
-        if (intersectStart <= intersectEnd) {
-            return createTextSpanFromBounds(intersectStart, intersectEnd);
-        }
-        return undefined;
-    }
-    ts.textSpanIntersection = textSpanIntersection;
-    function createTextSpan(start, length) {
-        if (start < 0) {
-            throw new Error("start < 0");
-        }
-        if (length < 0) {
-            throw new Error("length < 0");
-        }
-        return { start: start, length: length };
-    }
-    ts.createTextSpan = createTextSpan;
-    function createTextSpanFromBounds(start, end) {
-        return createTextSpan(start, end - start);
-    }
-    ts.createTextSpanFromBounds = createTextSpanFromBounds;
-    function textChangeRangeNewSpan(range) {
-        return createTextSpan(range.span.start, range.newLength);
-    }
-    ts.textChangeRangeNewSpan = textChangeRangeNewSpan;
-    function textChangeRangeIsUnchanged(range) {
-        return textSpanIsEmpty(range.span) && range.newLength === 0;
-    }
-    ts.textChangeRangeIsUnchanged = textChangeRangeIsUnchanged;
-    function createTextChangeRange(span, newLength) {
-        if (newLength < 0) {
-            throw new Error("newLength < 0");
-        }
-        return { span: span, newLength: newLength };
-    }
-    ts.createTextChangeRange = createTextChangeRange;
-    ts.unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
-    function collapseTextChangeRangesAcrossMultipleVersions(changes) {
-        if (changes.length === 0) {
-            return ts.unchangedTextChangeRange;
-        }
-        if (changes.length === 1) {
-            return changes[0];
-        }
-        var change0 = changes[0];
-        var oldStartN = change0.span.start;
-        var oldEndN = textSpanEnd(change0.span);
-        var newEndN = oldStartN + change0.newLength;
-        for (var i = 1; i < changes.length; i++) {
-            var nextChange = changes[i];
-            var oldStart1 = oldStartN;
-            var oldEnd1 = oldEndN;
-            var newEnd1 = newEndN;
-            var oldStart2 = nextChange.span.start;
-            var oldEnd2 = textSpanEnd(nextChange.span);
-            var newEnd2 = oldStart2 + nextChange.newLength;
-            oldStartN = Math.min(oldStart1, oldStart2);
-            oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
-            newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
-        }
-        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), newEndN - oldStartN);
-    }
-    ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
-    function getTypeParameterOwner(d) {
-        if (d && d.kind === 141) {
-            for (var current = d; current; current = current.parent) {
-                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 222) {
-                    return current;
-                }
-            }
-        }
-    }
-    ts.getTypeParameterOwner = getTypeParameterOwner;
-    function isParameterPropertyDeclaration(node) {
-        return node.flags & 92 && node.parent.kind === 148 && ts.isClassLike(node.parent.parent);
-    }
-    ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
-    function startsWith(str, prefix) {
-        return str.lastIndexOf(prefix, 0) === 0;
-    }
-    ts.startsWith = startsWith;
-    function endsWith(str, suffix) {
-        var expectedPos = str.length - suffix.length;
-        return str.indexOf(suffix, expectedPos) === expectedPos;
-    }
-    ts.endsWith = endsWith;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.parseTime = 0;
-    var NodeConstructor;
-    var SourceFileConstructor;
-    function createNode(kind, pos, end) {
-        if (kind === 256) {
-            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
-        }
-        else {
-            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
-        }
-    }
-    ts.createNode = createNode;
-    function visitNode(cbNode, node) {
-        if (node) {
-            return cbNode(node);
-        }
-    }
-    function visitNodeArray(cbNodes, nodes) {
-        if (nodes) {
-            return cbNodes(nodes);
-        }
-    }
-    function visitEachNode(cbNode, nodes) {
-        if (nodes) {
-            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
-                var node = nodes_1[_i];
-                var result = cbNode(node);
-                if (result) {
-                    return result;
-                }
-            }
-        }
-    }
-    function forEachChild(node, cbNode, cbNodeArray) {
-        if (!node) {
-            return;
-        }
-        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
-        var cbNodes = cbNodeArray || cbNode;
-        switch (node.kind) {
-            case 139:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.right);
-            case 141:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.constraint) ||
-                    visitNode(cbNode, node.expression);
-            case 254:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.equalsToken) ||
-                    visitNode(cbNode, node.objectAssignmentInitializer);
-            case 142:
-            case 145:
-            case 144:
-            case 253:
-            case 218:
-            case 169:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.dotDotDotToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.initializer);
-            case 156:
-            case 157:
-            case 151:
-            case 152:
-            case 153:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 147:
-            case 146:
-            case 148:
-            case 149:
-            case 150:
-            case 179:
-            case 220:
-            case 180:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.equalsGreaterThanToken) ||
-                    visitNode(cbNode, node.body);
-            case 155:
-                return visitNode(cbNode, node.typeName) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 154:
-                return visitNode(cbNode, node.parameterName) ||
-                    visitNode(cbNode, node.type);
-            case 158:
-                return visitNode(cbNode, node.exprName);
-            case 159:
-                return visitNodes(cbNodes, node.members);
-            case 160:
-                return visitNode(cbNode, node.elementType);
-            case 161:
-                return visitNodes(cbNodes, node.elementTypes);
-            case 162:
-            case 163:
-                return visitNodes(cbNodes, node.types);
-            case 164:
-                return visitNode(cbNode, node.type);
-            case 167:
-            case 168:
-                return visitNodes(cbNodes, node.elements);
-            case 170:
-                return visitNodes(cbNodes, node.elements);
-            case 171:
-                return visitNodes(cbNodes, node.properties);
-            case 172:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.dotToken) ||
-                    visitNode(cbNode, node.name);
-            case 173:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.argumentExpression);
-            case 174:
-            case 175:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments) ||
-                    visitNodes(cbNodes, node.arguments);
-            case 176:
-                return visitNode(cbNode, node.tag) ||
-                    visitNode(cbNode, node.template);
-            case 177:
-                return visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.expression);
-            case 178:
-                return visitNode(cbNode, node.expression);
-            case 181:
-                return visitNode(cbNode, node.expression);
-            case 182:
-                return visitNode(cbNode, node.expression);
-            case 183:
-                return visitNode(cbNode, node.expression);
-            case 185:
-                return visitNode(cbNode, node.operand);
-            case 190:
-                return visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.expression);
-            case 184:
-                return visitNode(cbNode, node.expression);
-            case 186:
-                return visitNode(cbNode, node.operand);
-            case 187:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.operatorToken) ||
-                    visitNode(cbNode, node.right);
-            case 195:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.type);
-            case 196:
-                return visitNode(cbNode, node.expression);
-            case 188:
-                return visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.whenTrue) ||
-                    visitNode(cbNode, node.colonToken) ||
-                    visitNode(cbNode, node.whenFalse);
-            case 191:
-                return visitNode(cbNode, node.expression);
-            case 199:
-            case 226:
-                return visitNodes(cbNodes, node.statements);
-            case 256:
-                return visitNodes(cbNodes, node.statements) ||
-                    visitNode(cbNode, node.endOfFileToken);
-            case 200:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.declarationList);
-            case 219:
-                return visitNodes(cbNodes, node.declarations);
-            case 202:
-                return visitNode(cbNode, node.expression);
-            case 203:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.thenStatement) ||
-                    visitNode(cbNode, node.elseStatement);
-            case 204:
-                return visitNode(cbNode, node.statement) ||
-                    visitNode(cbNode, node.expression);
-            case 205:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 206:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.incrementor) ||
-                    visitNode(cbNode, node.statement);
-            case 207:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 208:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 209:
-            case 210:
-                return visitNode(cbNode, node.label);
-            case 211:
-                return visitNode(cbNode, node.expression);
-            case 212:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 213:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.caseBlock);
-            case 227:
-                return visitNodes(cbNodes, node.clauses);
-            case 249:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.statements);
-            case 250:
-                return visitNodes(cbNodes, node.statements);
-            case 214:
-                return visitNode(cbNode, node.label) ||
-                    visitNode(cbNode, node.statement);
-            case 215:
-                return visitNode(cbNode, node.expression);
-            case 216:
-                return visitNode(cbNode, node.tryBlock) ||
-                    visitNode(cbNode, node.catchClause) ||
-                    visitNode(cbNode, node.finallyBlock);
-            case 252:
-                return visitNode(cbNode, node.variableDeclaration) ||
-                    visitNode(cbNode, node.block);
-            case 143:
-                return visitNode(cbNode, node.expression);
-            case 221:
-            case 192:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 222:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 223:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNode(cbNode, node.type);
-            case 224:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.members);
-            case 255:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 225:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.body);
-            case 229:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.moduleReference);
-            case 230:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.importClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 231:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.namedBindings);
-            case 228:
-                return visitNode(cbNode, node.name);
-            case 232:
-                return visitNode(cbNode, node.name);
-            case 233:
-            case 237:
-                return visitNodes(cbNodes, node.elements);
-            case 236:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.exportClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 234:
-            case 238:
-                return visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.name);
-            case 235:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.expression);
-            case 189:
-                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
-            case 197:
-                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
-            case 140:
-                return visitNode(cbNode, node.expression);
-            case 251:
-                return visitNodes(cbNodes, node.types);
-            case 194:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 240:
-                return visitNode(cbNode, node.expression);
-            case 239:
-                return visitNodes(cbNodes, node.decorators);
-            case 241:
-                return visitNode(cbNode, node.openingElement) ||
-                    visitNodes(cbNodes, node.children) ||
-                    visitNode(cbNode, node.closingElement);
-            case 242:
-            case 243:
-                return visitNode(cbNode, node.tagName) ||
-                    visitNodes(cbNodes, node.attributes);
-            case 246:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 247:
-                return visitNode(cbNode, node.expression);
-            case 248:
-                return visitNode(cbNode, node.expression);
-            case 245:
-                return visitNode(cbNode, node.tagName);
-            case 257:
-                return visitNode(cbNode, node.type);
-            case 261:
-                return visitNodes(cbNodes, node.types);
-            case 262:
-                return visitNodes(cbNodes, node.types);
-            case 260:
-                return visitNode(cbNode, node.elementType);
-            case 264:
-                return visitNode(cbNode, node.type);
-            case 263:
-                return visitNode(cbNode, node.type);
-            case 265:
-                return visitNodes(cbNodes, node.members);
-            case 267:
-                return visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 268:
-                return visitNode(cbNode, node.type);
-            case 269:
-                return visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 270:
-                return visitNode(cbNode, node.type);
-            case 271:
-                return visitNode(cbNode, node.type);
-            case 272:
-                return visitNode(cbNode, node.type);
-            case 266:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.type);
-            case 273:
-                return visitNodes(cbNodes, node.tags);
-            case 275:
-                return visitNode(cbNode, node.preParameterName) ||
-                    visitNode(cbNode, node.typeExpression) ||
-                    visitNode(cbNode, node.postParameterName);
-            case 276:
-                return visitNode(cbNode, node.typeExpression);
-            case 277:
-                return visitNode(cbNode, node.typeExpression);
-            case 278:
-                return visitNodes(cbNodes, node.typeParameters);
-        }
-    }
-    ts.forEachChild = forEachChild;
-    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
-        if (setParentNodes === void 0) { setParentNodes = false; }
-        var start = new Date().getTime();
-        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, undefined, setParentNodes, scriptKind);
-        ts.parseTime += new Date().getTime() - start;
-        return result;
-    }
-    ts.createSourceFile = createSourceFile;
-    function isExternalModule(file) {
-        return file.externalModuleIndicator !== undefined;
-    }
-    ts.isExternalModule = isExternalModule;
-    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-        return IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
-    }
-    ts.updateSourceFile = updateSourceFile;
-    function parseIsolatedJSDocComment(content, start, length) {
-        return Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
-    }
-    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-    function parseJSDocTypeExpressionForTests(content, start, length) {
-        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
-    }
-    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-    var Parser;
-    (function (Parser) {
-        var scanner = ts.createScanner(2, true);
-        var disallowInAndDecoratorContext = 4194304 | 16777216;
-        var NodeConstructor;
-        var SourceFileConstructor;
-        var sourceFile;
-        var parseDiagnostics;
-        var syntaxCursor;
-        var token;
-        var sourceText;
-        var nodeCount;
-        var identifiers;
-        var identifierCount;
-        var parsingContext;
-        var contextFlags;
-        var parseErrorBeforeNextFinishedNode = false;
-        function parseSourceFile(fileName, _sourceText, languageVersion, _syntaxCursor, setParentNodes, scriptKind) {
-            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
-            initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind);
-            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
-            clearState();
-            return result;
-        }
-        Parser.parseSourceFile = parseSourceFile;
-        function getLanguageVariant(scriptKind) {
-            return scriptKind === 4 || scriptKind === 2 || scriptKind === 1 ? 1 : 0;
-        }
-        function initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind) {
-            NodeConstructor = ts.objectAllocator.getNodeConstructor();
-            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
-            sourceText = _sourceText;
-            syntaxCursor = _syntaxCursor;
-            parseDiagnostics = [];
-            parsingContext = 0;
-            identifiers = {};
-            identifierCount = 0;
-            nodeCount = 0;
-            contextFlags = scriptKind === 1 || scriptKind === 2 ? 134217728 : 0;
-            parseErrorBeforeNextFinishedNode = false;
-            scanner.setText(sourceText);
-            scanner.setOnError(scanError);
-            scanner.setScriptTarget(languageVersion);
-            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
-        }
-        function clearState() {
-            scanner.setText("");
-            scanner.setOnError(undefined);
-            parseDiagnostics = undefined;
-            sourceFile = undefined;
-            identifiers = undefined;
-            syntaxCursor = undefined;
-            sourceText = undefined;
-        }
-        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
-            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
-            sourceFile.flags = contextFlags;
-            token = nextToken();
-            processReferenceComments(sourceFile);
-            sourceFile.statements = parseList(0, parseStatement);
-            ts.Debug.assert(token === 1);
-            sourceFile.endOfFileToken = parseTokenNode();
-            setExternalModuleIndicator(sourceFile);
-            sourceFile.nodeCount = nodeCount;
-            sourceFile.identifierCount = identifierCount;
-            sourceFile.identifiers = identifiers;
-            sourceFile.parseDiagnostics = parseDiagnostics;
-            if (setParentNodes) {
-                fixupParentReferences(sourceFile);
-            }
-            return sourceFile;
-        }
-        function addJSDocComment(node) {
-            if (contextFlags & 134217728) {
-                var comments = ts.getLeadingCommentRangesOfNode(node, sourceFile);
-                if (comments) {
-                    for (var _i = 0, comments_1 = comments; _i < comments_1.length; _i++) {
-                        var comment = comments_1[_i];
-                        var jsDocComment = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
-                        if (jsDocComment) {
-                            node.jsDocComment = jsDocComment;
-                        }
-                    }
-                }
-            }
-            return node;
-        }
-        function fixupParentReferences(sourceFile) {
-            var parent = sourceFile;
-            forEachChild(sourceFile, visitNode);
-            return;
-            function visitNode(n) {
-                if (n.parent !== parent) {
-                    n.parent = parent;
-                    var saveParent = parent;
-                    parent = n;
-                    forEachChild(n, visitNode);
-                    parent = saveParent;
-                }
-            }
-        }
-        Parser.fixupParentReferences = fixupParentReferences;
-        function createSourceFile(fileName, languageVersion, scriptKind) {
-            var sourceFile = new SourceFileConstructor(256, 0, sourceText.length);
-            nodeCount++;
-            sourceFile.text = sourceText;
-            sourceFile.bindDiagnostics = [];
-            sourceFile.languageVersion = languageVersion;
-            sourceFile.fileName = ts.normalizePath(fileName);
-            sourceFile.languageVariant = getLanguageVariant(scriptKind);
-            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts");
-            sourceFile.scriptKind = scriptKind;
-            return sourceFile;
-        }
-        function setContextFlag(val, flag) {
-            if (val) {
-                contextFlags |= flag;
-            }
-            else {
-                contextFlags &= ~flag;
-            }
-        }
-        function setDisallowInContext(val) {
-            setContextFlag(val, 4194304);
-        }
-        function setYieldContext(val) {
-            setContextFlag(val, 8388608);
-        }
-        function setDecoratorContext(val) {
-            setContextFlag(val, 16777216);
-        }
-        function setAwaitContext(val) {
-            setContextFlag(val, 33554432);
-        }
-        function doOutsideOfContext(context, func) {
-            var contextFlagsToClear = context & contextFlags;
-            if (contextFlagsToClear) {
-                setContextFlag(false, contextFlagsToClear);
-                var result = func();
-                setContextFlag(true, contextFlagsToClear);
-                return result;
-            }
-            return func();
-        }
-        function doInsideOfContext(context, func) {
-            var contextFlagsToSet = context & ~contextFlags;
-            if (contextFlagsToSet) {
-                setContextFlag(true, contextFlagsToSet);
-                var result = func();
-                setContextFlag(false, contextFlagsToSet);
-                return result;
-            }
-            return func();
-        }
-        function allowInAnd(func) {
-            return doOutsideOfContext(4194304, func);
-        }
-        function disallowInAnd(func) {
-            return doInsideOfContext(4194304, func);
-        }
-        function doInYieldContext(func) {
-            return doInsideOfContext(8388608, func);
-        }
-        function doInDecoratorContext(func) {
-            return doInsideOfContext(16777216, func);
-        }
-        function doInAwaitContext(func) {
-            return doInsideOfContext(33554432, func);
-        }
-        function doOutsideOfAwaitContext(func) {
-            return doOutsideOfContext(33554432, func);
-        }
-        function doInYieldAndAwaitContext(func) {
-            return doInsideOfContext(8388608 | 33554432, func);
-        }
-        function inContext(flags) {
-            return (contextFlags & flags) !== 0;
-        }
-        function inYieldContext() {
-            return inContext(8388608);
-        }
-        function inDisallowInContext() {
-            return inContext(4194304);
-        }
-        function inDecoratorContext() {
-            return inContext(16777216);
-        }
-        function inAwaitContext() {
-            return inContext(33554432);
-        }
-        function parseErrorAtCurrentToken(message, arg0) {
-            var start = scanner.getTokenPos();
-            var length = scanner.getTextPos() - start;
-            parseErrorAtPosition(start, length, message, arg0);
-        }
-        function parseErrorAtPosition(start, length, message, arg0) {
-            var lastError = ts.lastOrUndefined(parseDiagnostics);
-            if (!lastError || start !== lastError.start) {
-                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
-            }
-            parseErrorBeforeNextFinishedNode = true;
-        }
-        function scanError(message, length) {
-            var pos = scanner.getTextPos();
-            parseErrorAtPosition(pos, length || 0, message);
-        }
-        function getNodePos() {
-            return scanner.getStartPos();
-        }
-        function getNodeEnd() {
-            return scanner.getStartPos();
-        }
-        function nextToken() {
-            return token = scanner.scan();
-        }
-        function reScanGreaterToken() {
-            return token = scanner.reScanGreaterToken();
-        }
-        function reScanSlashToken() {
-            return token = scanner.reScanSlashToken();
-        }
-        function reScanTemplateToken() {
-            return token = scanner.reScanTemplateToken();
-        }
-        function scanJsxIdentifier() {
-            return token = scanner.scanJsxIdentifier();
-        }
-        function scanJsxText() {
-            return token = scanner.scanJsxToken();
-        }
-        function speculationHelper(callback, isLookAhead) {
-            var saveToken = token;
-            var saveParseDiagnosticsLength = parseDiagnostics.length;
-            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-            var saveContextFlags = contextFlags;
-            var result = isLookAhead
-                ? scanner.lookAhead(callback)
-                : scanner.tryScan(callback);
-            ts.Debug.assert(saveContextFlags === contextFlags);
-            if (!result || isLookAhead) {
-                token = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-            }
-            return result;
-        }
-        function lookAhead(callback) {
-            return speculationHelper(callback, true);
-        }
-        function tryParse(callback) {
-            return speculationHelper(callback, false);
-        }
-        function isIdentifier() {
-            if (token === 69) {
-                return true;
-            }
-            if (token === 114 && inYieldContext()) {
-                return false;
-            }
-            if (token === 119 && inAwaitContext()) {
-                return false;
-            }
-            return token > 105;
-        }
-        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
-            if (shouldAdvance === void 0) { shouldAdvance = true; }
-            if (token === kind) {
-                if (shouldAdvance) {
-                    nextToken();
-                }
-                return true;
-            }
-            if (diagnosticMessage) {
-                parseErrorAtCurrentToken(diagnosticMessage);
-            }
-            else {
-                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
-            }
-            return false;
-        }
-        function parseOptional(t) {
-            if (token === t) {
-                nextToken();
-                return true;
-            }
-            return false;
-        }
-        function parseOptionalToken(t) {
-            if (token === t) {
-                return parseTokenNode();
-            }
-            return undefined;
-        }
-        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            return parseOptionalToken(t) ||
-                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
-        }
-        function parseTokenNode() {
-            var node = createNode(token);
-            nextToken();
-            return finishNode(node);
-        }
-        function canParseSemicolon() {
-            if (token === 23) {
-                return true;
-            }
-            return token === 16 || token === 1 || scanner.hasPrecedingLineBreak();
-        }
-        function parseSemicolon() {
-            if (canParseSemicolon()) {
-                if (token === 23) {
-                    nextToken();
-                }
-                return true;
-            }
-            else {
-                return parseExpected(23);
-            }
-        }
-        function createNode(kind, pos) {
-            nodeCount++;
-            if (!(pos >= 0)) {
-                pos = scanner.getStartPos();
-            }
-            return new NodeConstructor(kind, pos, pos);
-        }
-        function finishNode(node, end) {
-            node.end = end === undefined ? scanner.getStartPos() : end;
-            if (contextFlags) {
-                node.flags |= contextFlags;
-            }
-            if (parseErrorBeforeNextFinishedNode) {
-                parseErrorBeforeNextFinishedNode = false;
-                node.flags |= 67108864;
-            }
-            return node;
-        }
-        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            if (reportAtCurrentPosition) {
-                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
-            }
-            else {
-                parseErrorAtCurrentToken(diagnosticMessage, arg0);
-            }
-            var result = createNode(kind, scanner.getStartPos());
-            result.text = "";
-            return finishNode(result);
-        }
-        function internIdentifier(text) {
-            text = ts.escapeIdentifier(text);
-            return ts.hasProperty(identifiers, text) ? identifiers[text] : (identifiers[text] = text);
-        }
-        function createIdentifier(isIdentifier, diagnosticMessage) {
-            identifierCount++;
-            if (isIdentifier) {
-                var node = createNode(69);
-                if (token !== 69) {
-                    node.originalKeywordKind = token;
-                }
-                node.text = internIdentifier(scanner.getTokenValue());
-                nextToken();
-                return finishNode(node);
-            }
-            return createMissingNode(69, false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
-        }
-        function parseIdentifier(diagnosticMessage) {
-            return createIdentifier(isIdentifier(), diagnosticMessage);
-        }
-        function parseIdentifierName() {
-            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token));
-        }
-        function isLiteralPropertyName() {
-            return ts.tokenIsIdentifierOrKeyword(token) ||
-                token === 9 ||
-                token === 8;
-        }
-        function parsePropertyNameWorker(allowComputedPropertyNames) {
-            if (token === 9 || token === 8) {
-                return parseLiteralNode(true);
-            }
-            if (allowComputedPropertyNames && token === 19) {
-                return parseComputedPropertyName();
-            }
-            return parseIdentifierName();
-        }
-        function parsePropertyName() {
-            return parsePropertyNameWorker(true);
-        }
-        function parseSimplePropertyName() {
-            return parsePropertyNameWorker(false);
-        }
-        function isSimplePropertyName() {
-            return token === 9 || token === 8 || ts.tokenIsIdentifierOrKeyword(token);
-        }
-        function parseComputedPropertyName() {
-            var node = createNode(140);
-            parseExpected(19);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(20);
-            return finishNode(node);
-        }
-        function parseContextualModifier(t) {
-            return token === t && tryParse(nextTokenCanFollowModifier);
-        }
-        function nextTokenIsOnSameLineAndCanFollowModifier() {
-            nextToken();
-            if (scanner.hasPrecedingLineBreak()) {
-                return false;
-            }
-            return canFollowModifier();
-        }
-        function nextTokenCanFollowModifier() {
-            if (token === 74) {
-                return nextToken() === 81;
-            }
-            if (token === 82) {
-                nextToken();
-                if (token === 77) {
-                    return lookAhead(nextTokenIsClassOrFunction);
-                }
-                return token !== 37 && token !== 116 && token !== 15 && canFollowModifier();
-            }
-            if (token === 77) {
-                return nextTokenIsClassOrFunction();
-            }
-            if (token === 113) {
-                nextToken();
-                return canFollowModifier();
-            }
-            return nextTokenIsOnSameLineAndCanFollowModifier();
-        }
-        function parseAnyContextualModifier() {
-            return ts.isModifierKind(token) && tryParse(nextTokenCanFollowModifier);
-        }
-        function canFollowModifier() {
-            return token === 19
-                || token === 15
-                || token === 37
-                || isLiteralPropertyName();
-        }
-        function nextTokenIsClassOrFunction() {
-            nextToken();
-            return token === 73 || token === 87;
-        }
-        function isListElement(parsingContext, inErrorRecovery) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return true;
-            }
-            switch (parsingContext) {
-                case 0:
-                case 1:
-                case 3:
-                    return !(token === 23 && inErrorRecovery) && isStartOfStatement();
-                case 2:
-                    return token === 71 || token === 77;
-                case 4:
-                    return lookAhead(isTypeMemberStart);
-                case 5:
-                    return lookAhead(isClassMemberStart) || (token === 23 && !inErrorRecovery);
-                case 6:
-                    return token === 19 || isLiteralPropertyName();
-                case 12:
-                    return token === 19 || token === 37 || isLiteralPropertyName();
-                case 9:
-                    return token === 19 || isLiteralPropertyName();
-                case 7:
-                    if (token === 15) {
-                        return lookAhead(isValidHeritageClauseObjectLiteral);
-                    }
-                    if (!inErrorRecovery) {
-                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
-                    }
-                    else {
-                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
-                    }
-                case 8:
-                    return isIdentifierOrPattern();
-                case 10:
-                    return token === 24 || token === 22 || isIdentifierOrPattern();
-                case 17:
-                    return isIdentifier();
-                case 11:
-                case 15:
-                    return token === 24 || token === 22 || isStartOfExpression();
-                case 16:
-                    return isStartOfParameter();
-                case 18:
-                case 19:
-                    return token === 24 || isStartOfType();
-                case 20:
-                    return isHeritageClause();
-                case 21:
-                    return ts.tokenIsIdentifierOrKeyword(token);
-                case 13:
-                    return ts.tokenIsIdentifierOrKeyword(token) || token === 15;
-                case 14:
-                    return true;
-                case 22:
-                case 23:
-                case 25:
-                    return JSDocParser.isJSDocType();
-                case 24:
-                    return isSimplePropertyName();
-            }
-            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
-        }
-        function isValidHeritageClauseObjectLiteral() {
-            ts.Debug.assert(token === 15);
-            if (nextToken() === 16) {
-                var next = nextToken();
-                return next === 24 || next === 15 || next === 83 || next === 106;
-            }
-            return true;
-        }
-        function nextTokenIsIdentifier() {
-            nextToken();
-            return isIdentifier();
-        }
-        function nextTokenIsIdentifierOrKeyword() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token);
-        }
-        function isHeritageClauseExtendsOrImplementsKeyword() {
-            if (token === 106 ||
-                token === 83) {
-                return lookAhead(nextTokenIsStartOfExpression);
-            }
-            return false;
-        }
-        function nextTokenIsStartOfExpression() {
-            nextToken();
-            return isStartOfExpression();
-        }
-        function isListTerminator(kind) {
-            if (token === 1) {
-                return true;
-            }
-            switch (kind) {
-                case 1:
-                case 2:
-                case 4:
-                case 5:
-                case 6:
-                case 12:
-                case 9:
-                case 21:
-                    return token === 16;
-                case 3:
-                    return token === 16 || token === 71 || token === 77;
-                case 7:
-                    return token === 15 || token === 83 || token === 106;
-                case 8:
-                    return isVariableDeclaratorListTerminator();
-                case 17:
-                    return token === 27 || token === 17 || token === 15 || token === 83 || token === 106;
-                case 11:
-                    return token === 18 || token === 23;
-                case 15:
-                case 19:
-                case 10:
-                    return token === 20;
-                case 16:
-                    return token === 18 || token === 20;
-                case 18:
-                    return token === 27 || token === 17;
-                case 20:
-                    return token === 15 || token === 16;
-                case 13:
-                    return token === 27 || token === 39;
-                case 14:
-                    return token === 25 && lookAhead(nextTokenIsSlash);
-                case 22:
-                    return token === 18 || token === 54 || token === 16;
-                case 23:
-                    return token === 27 || token === 16;
-                case 25:
-                    return token === 20 || token === 16;
-                case 24:
-                    return token === 16;
-            }
-        }
-        function isVariableDeclaratorListTerminator() {
-            if (canParseSemicolon()) {
-                return true;
-            }
-            if (isInOrOfKeyword(token)) {
-                return true;
-            }
-            if (token === 34) {
-                return true;
-            }
-            return false;
-        }
-        function isInSomeParsingContext() {
-            for (var kind = 0; kind < 26; kind++) {
-                if (parsingContext & (1 << kind)) {
-                    if (isListElement(kind, true) || isListTerminator(kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function parseList(kind, parseElement) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = [];
-            result.pos = getNodePos();
-            while (!isListTerminator(kind)) {
-                if (isListElement(kind, false)) {
-                    var element = parseListElement(kind, parseElement);
-                    result.push(element);
-                    continue;
-                }
-                if (abortParsingListOrMoveToNextToken(kind)) {
-                    break;
-                }
-            }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function parseListElement(parsingContext, parseElement) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return consumeNode(node);
-            }
-            return parseElement();
-        }
-        function currentNode(parsingContext) {
-            if (parseErrorBeforeNextFinishedNode) {
-                return undefined;
-            }
-            if (!syntaxCursor) {
-                return undefined;
-            }
-            var node = syntaxCursor.currentNode(scanner.getStartPos());
-            if (ts.nodeIsMissing(node)) {
-                return undefined;
-            }
-            if (node.intersectsChange) {
-                return undefined;
-            }
-            if (ts.containsParseError(node)) {
-                return undefined;
-            }
-            var nodeContextFlags = node.flags & 197132288;
-            if (nodeContextFlags !== contextFlags) {
-                return undefined;
-            }
-            if (!canReuseNode(node, parsingContext)) {
-                return undefined;
-            }
-            return node;
-        }
-        function consumeNode(node) {
-            scanner.setTextPos(node.end);
-            nextToken();
-            return node;
-        }
-        function canReuseNode(node, parsingContext) {
-            switch (parsingContext) {
-                case 5:
-                    return isReusableClassMember(node);
-                case 2:
-                    return isReusableSwitchClause(node);
-                case 0:
-                case 1:
-                case 3:
-                    return isReusableStatement(node);
-                case 6:
-                    return isReusableEnumMember(node);
-                case 4:
-                    return isReusableTypeMember(node);
-                case 8:
-                    return isReusableVariableDeclaration(node);
-                case 16:
-                    return isReusableParameter(node);
-                case 20:
-                case 17:
-                case 19:
-                case 18:
-                case 11:
-                case 12:
-                case 7:
-                case 13:
-                case 14:
-            }
-            return false;
-        }
-        function isReusableClassMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 148:
-                    case 153:
-                    case 149:
-                    case 150:
-                    case 145:
-                    case 198:
-                        return true;
-                    case 147:
-                        var methodDeclaration = node;
-                        var nameIsConstructor = methodDeclaration.name.kind === 69 &&
-                            methodDeclaration.name.originalKeywordKind === 121;
-                        return !nameIsConstructor;
-                }
-            }
-            return false;
-        }
-        function isReusableSwitchClause(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 249:
-                    case 250:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableStatement(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 220:
-                    case 200:
-                    case 199:
-                    case 203:
-                    case 202:
-                    case 215:
-                    case 211:
-                    case 213:
-                    case 210:
-                    case 209:
-                    case 207:
-                    case 208:
-                    case 206:
-                    case 205:
-                    case 212:
-                    case 201:
-                    case 216:
-                    case 214:
-                    case 204:
-                    case 217:
-                    case 230:
-                    case 229:
-                    case 236:
-                    case 235:
-                    case 225:
-                    case 221:
-                    case 222:
-                    case 224:
-                    case 223:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableEnumMember(node) {
-            return node.kind === 255;
-        }
-        function isReusableTypeMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 152:
-                    case 146:
-                    case 153:
-                    case 144:
-                    case 151:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableVariableDeclaration(node) {
-            if (node.kind !== 218) {
-                return false;
-            }
-            var variableDeclarator = node;
-            return variableDeclarator.initializer === undefined;
-        }
-        function isReusableParameter(node) {
-            if (node.kind !== 142) {
-                return false;
-            }
-            var parameter = node;
-            return parameter.initializer === undefined;
-        }
-        function abortParsingListOrMoveToNextToken(kind) {
-            parseErrorAtCurrentToken(parsingContextErrors(kind));
-            if (isInSomeParsingContext()) {
-                return true;
-            }
-            nextToken();
-            return false;
-        }
-        function parsingContextErrors(context) {
-            switch (context) {
-                case 0: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 1: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 2: return ts.Diagnostics.case_or_default_expected;
-                case 3: return ts.Diagnostics.Statement_expected;
-                case 4: return ts.Diagnostics.Property_or_signature_expected;
-                case 5: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
-                case 6: return ts.Diagnostics.Enum_member_expected;
-                case 7: return ts.Diagnostics.Expression_expected;
-                case 8: return ts.Diagnostics.Variable_declaration_expected;
-                case 9: return ts.Diagnostics.Property_destructuring_pattern_expected;
-                case 10: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
-                case 11: return ts.Diagnostics.Argument_expression_expected;
-                case 12: return ts.Diagnostics.Property_assignment_expected;
-                case 15: return ts.Diagnostics.Expression_or_comma_expected;
-                case 16: return ts.Diagnostics.Parameter_declaration_expected;
-                case 17: return ts.Diagnostics.Type_parameter_declaration_expected;
-                case 18: return ts.Diagnostics.Type_argument_expected;
-                case 19: return ts.Diagnostics.Type_expected;
-                case 20: return ts.Diagnostics.Unexpected_token_expected;
-                case 21: return ts.Diagnostics.Identifier_expected;
-                case 13: return ts.Diagnostics.Identifier_expected;
-                case 14: return ts.Diagnostics.Identifier_expected;
-                case 22: return ts.Diagnostics.Parameter_declaration_expected;
-                case 23: return ts.Diagnostics.Type_argument_expected;
-                case 25: return ts.Diagnostics.Type_expected;
-                case 24: return ts.Diagnostics.Property_assignment_expected;
-            }
-        }
-        ;
-        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = [];
-            result.pos = getNodePos();
-            var commaStart = -1;
-            while (true) {
-                if (isListElement(kind, false)) {
-                    result.push(parseListElement(kind, parseElement));
-                    commaStart = scanner.getTokenPos();
-                    if (parseOptional(24)) {
-                        continue;
-                    }
-                    commaStart = -1;
-                    if (isListTerminator(kind)) {
-                        break;
-                    }
-                    parseExpected(24);
-                    if (considerSemicolonAsDelimiter && token === 23 && !scanner.hasPrecedingLineBreak()) {
-                        nextToken();
-                    }
-                    continue;
-                }
-                if (isListTerminator(kind)) {
-                    break;
-                }
-                if (abortParsingListOrMoveToNextToken(kind)) {
-                    break;
-                }
-            }
-            if (commaStart >= 0) {
-                result.hasTrailingComma = true;
-            }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function createMissingList() {
-            var pos = getNodePos();
-            var result = [];
-            result.pos = pos;
-            result.end = pos;
-            return result;
-        }
-        function parseBracketedList(kind, parseElement, open, close) {
-            if (parseExpected(open)) {
-                var result = parseDelimitedList(kind, parseElement);
-                parseExpected(close);
-                return result;
-            }
-            return createMissingList();
-        }
-        function parseEntityName(allowReservedWords, diagnosticMessage) {
-            var entity = parseIdentifier(diagnosticMessage);
-            while (parseOptional(21)) {
-                var node = createNode(139, entity.pos);
-                node.left = entity;
-                node.right = parseRightSideOfDot(allowReservedWords);
-                entity = finishNode(node);
-            }
-            return entity;
-        }
-        function parseRightSideOfDot(allowIdentifierNames) {
-            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token)) {
-                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                if (matchesPattern) {
-                    return createMissingNode(69, true, ts.Diagnostics.Identifier_expected);
-                }
-            }
-            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
-        }
-        function parseTemplateExpression() {
-            var template = createNode(189);
-            template.head = parseTemplateLiteralFragment();
-            ts.Debug.assert(template.head.kind === 12, "Template head has wrong token kind");
-            var templateSpans = [];
-            templateSpans.pos = getNodePos();
-            do {
-                templateSpans.push(parseTemplateSpan());
-            } while (ts.lastOrUndefined(templateSpans).literal.kind === 13);
-            templateSpans.end = getNodeEnd();
-            template.templateSpans = templateSpans;
-            return finishNode(template);
-        }
-        function parseTemplateSpan() {
-            var span = createNode(197);
-            span.expression = allowInAnd(parseExpression);
-            var literal;
-            if (token === 16) {
-                reScanTemplateToken();
-                literal = parseTemplateLiteralFragment();
-            }
-            else {
-                literal = parseExpectedToken(14, false, ts.Diagnostics._0_expected, ts.tokenToString(16));
-            }
-            span.literal = literal;
-            return finishNode(span);
-        }
-        function parseStringLiteralTypeNode() {
-            return parseLiteralLikeNode(166, true);
-        }
-        function parseLiteralNode(internName) {
-            return parseLiteralLikeNode(token, internName);
-        }
-        function parseTemplateLiteralFragment() {
-            return parseLiteralLikeNode(token, false);
-        }
-        function parseLiteralLikeNode(kind, internName) {
-            var node = createNode(kind);
-            var text = scanner.getTokenValue();
-            node.text = internName ? internIdentifier(text) : text;
-            if (scanner.hasExtendedUnicodeEscape()) {
-                node.hasExtendedUnicodeEscape = true;
-            }
-            if (scanner.isUnterminated()) {
-                node.isUnterminated = true;
-            }
-            var tokenPos = scanner.getTokenPos();
-            nextToken();
-            finishNode(node);
-            if (node.kind === 8
-                && sourceText.charCodeAt(tokenPos) === 48
-                && ts.isOctalDigit(sourceText.charCodeAt(tokenPos + 1))) {
-                node.isOctalLiteral = true;
-            }
-            return node;
-        }
-        function parseTypeReference() {
-            var typeName = parseEntityName(false, ts.Diagnostics.Type_expected);
-            var node = createNode(155, typeName.pos);
-            node.typeName = typeName;
-            if (!scanner.hasPrecedingLineBreak() && token === 25) {
-                node.typeArguments = parseBracketedList(18, parseType, 25, 27);
-            }
-            return finishNode(node);
-        }
-        function parseThisTypePredicate(lhs) {
-            nextToken();
-            var node = createNode(154, lhs.pos);
-            node.parameterName = lhs;
-            node.type = parseType();
-            return finishNode(node);
-        }
-        function parseThisTypeNode() {
-            var node = createNode(165);
-            nextToken();
-            return finishNode(node);
-        }
-        function parseTypeQuery() {
-            var node = createNode(158);
-            parseExpected(101);
-            node.exprName = parseEntityName(true);
-            return finishNode(node);
-        }
-        function parseTypeParameter() {
-            var node = createNode(141);
-            node.name = parseIdentifier();
-            if (parseOptional(83)) {
-                if (isStartOfType() || !isStartOfExpression()) {
-                    node.constraint = parseType();
-                }
-                else {
-                    node.expression = parseUnaryExpressionOrHigher();
-                }
-            }
-            return finishNode(node);
-        }
-        function parseTypeParameters() {
-            if (token === 25) {
-                return parseBracketedList(17, parseTypeParameter, 25, 27);
-            }
-        }
-        function parseParameterType() {
-            if (parseOptional(54)) {
-                return parseType();
-            }
-            return undefined;
-        }
-        function isStartOfParameter() {
-            return token === 22 || isIdentifierOrPattern() || ts.isModifierKind(token) || token === 55 || token === 97;
-        }
-        function setModifiers(node, modifiers) {
-            if (modifiers) {
-                node.flags |= modifiers.flags;
-                node.modifiers = modifiers;
-            }
-        }
-        function parseParameter() {
-            var node = createNode(142);
-            if (token === 97) {
-                node.name = createIdentifier(true, undefined);
-                node.type = parseParameterType();
-                return finishNode(node);
-            }
-            node.decorators = parseDecorators();
-            setModifiers(node, parseModifiers());
-            node.dotDotDotToken = parseOptionalToken(22);
-            node.name = parseIdentifierOrPattern();
-            if (ts.getFullWidth(node.name) === 0 && node.flags === 0 && ts.isModifierKind(token)) {
-                nextToken();
-            }
-            node.questionToken = parseOptionalToken(53);
-            node.type = parseParameterType();
-            node.initializer = parseBindingElementInitializer(true);
-            return addJSDocComment(finishNode(node));
-        }
-        function parseBindingElementInitializer(inParameter) {
-            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
-        }
-        function parseParameterInitializer() {
-            return parseInitializer(true);
-        }
-        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
-            var returnTokenRequired = returnToken === 34;
-            signature.typeParameters = parseTypeParameters();
-            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
-            if (returnTokenRequired) {
-                parseExpected(returnToken);
-                signature.type = parseTypeOrTypePredicate();
-            }
-            else if (parseOptional(returnToken)) {
-                signature.type = parseTypeOrTypePredicate();
-            }
-        }
-        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
-            if (parseExpected(17)) {
-                var savedYieldContext = inYieldContext();
-                var savedAwaitContext = inAwaitContext();
-                setYieldContext(yieldContext);
-                setAwaitContext(awaitContext);
-                var result = parseDelimitedList(16, parseParameter);
-                setYieldContext(savedYieldContext);
-                setAwaitContext(savedAwaitContext);
-                if (!parseExpected(18) && requireCompleteParameterList) {
-                    return undefined;
-                }
-                return result;
-            }
-            return requireCompleteParameterList ? undefined : createMissingList();
-        }
-        function parseTypeMemberSemicolon() {
-            if (parseOptional(24)) {
-                return;
-            }
-            parseSemicolon();
-        }
-        function parseSignatureMember(kind) {
-            var node = createNode(kind);
-            if (kind === 152) {
-                parseExpected(92);
-            }
-            fillSignature(54, false, false, false, node);
-            parseTypeMemberSemicolon();
-            return finishNode(node);
-        }
-        function isIndexSignature() {
-            if (token !== 19) {
-                return false;
-            }
-            return lookAhead(isUnambiguouslyIndexSignature);
-        }
-        function isUnambiguouslyIndexSignature() {
-            nextToken();
-            if (token === 22 || token === 20) {
-                return true;
-            }
-            if (ts.isModifierKind(token)) {
-                nextToken();
-                if (isIdentifier()) {
-                    return true;
-                }
-            }
-            else if (!isIdentifier()) {
-                return false;
-            }
-            else {
-                nextToken();
-            }
-            if (token === 54 || token === 24) {
-                return true;
-            }
-            if (token !== 53) {
-                return false;
-            }
-            nextToken();
-            return token === 54 || token === 24 || token === 20;
-        }
-        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(153, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.parameters = parseBracketedList(16, parseParameter, 19, 20);
-            node.type = parseTypeAnnotation();
-            parseTypeMemberSemicolon();
-            return finishNode(node);
-        }
-        function parsePropertyOrMethodSignature(fullStart, modifiers) {
-            var name = parsePropertyName();
-            var questionToken = parseOptionalToken(53);
-            if (token === 17 || token === 25) {
-                var method = createNode(146, fullStart);
-                setModifiers(method, modifiers);
-                method.name = name;
-                method.questionToken = questionToken;
-                fillSignature(54, false, false, false, method);
-                parseTypeMemberSemicolon();
-                return finishNode(method);
-            }
-            else {
-                var property = createNode(144, fullStart);
-                setModifiers(property, modifiers);
-                property.name = name;
-                property.questionToken = questionToken;
-                property.type = parseTypeAnnotation();
-                if (token === 56) {
-                    property.initializer = parseNonParameterInitializer();
-                }
-                parseTypeMemberSemicolon();
-                return finishNode(property);
-            }
-        }
-        function isTypeMemberStart() {
-            var idToken;
-            if (token === 17 || token === 25) {
-                return true;
-            }
-            while (ts.isModifierKind(token)) {
-                idToken = token;
-                nextToken();
-            }
-            if (token === 19) {
-                return true;
-            }
-            if (isLiteralPropertyName()) {
-                idToken = token;
-                nextToken();
-            }
-            if (idToken) {
-                return token === 17 ||
-                    token === 25 ||
-                    token === 53 ||
-                    token === 54 ||
-                    canParseSemicolon();
-            }
-            return false;
-        }
-        function parseTypeMember() {
-            if (token === 17 || token === 25) {
-                return parseSignatureMember(151);
-            }
-            if (token === 92 && lookAhead(isStartOfConstructSignature)) {
-                return parseSignatureMember(152);
-            }
-            var fullStart = getNodePos();
-            var modifiers = parseModifiers();
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, undefined, modifiers);
-            }
-            return parsePropertyOrMethodSignature(fullStart, modifiers);
-        }
-        function isStartOfConstructSignature() {
-            nextToken();
-            return token === 17 || token === 25;
-        }
-        function parseTypeLiteral() {
-            var node = createNode(159);
-            node.members = parseObjectTypeMembers();
-            return finishNode(node);
-        }
-        function parseObjectTypeMembers() {
-            var members;
-            if (parseExpected(15)) {
-                members = parseList(4, parseTypeMember);
-                parseExpected(16);
-            }
-            else {
-                members = createMissingList();
-            }
-            return members;
-        }
-        function parseTupleType() {
-            var node = createNode(161);
-            node.elementTypes = parseBracketedList(19, parseType, 19, 20);
-            return finishNode(node);
-        }
-        function parseParenthesizedType() {
-            var node = createNode(164);
-            parseExpected(17);
-            node.type = parseType();
-            parseExpected(18);
-            return finishNode(node);
-        }
-        function parseFunctionOrConstructorType(kind) {
-            var node = createNode(kind);
-            if (kind === 157) {
-                parseExpected(92);
-            }
-            fillSignature(34, false, false, false, node);
-            return finishNode(node);
-        }
-        function parseKeywordAndNoDot() {
-            var node = parseTokenNode();
-            return token === 21 ? undefined : node;
-        }
-        function parseNonArrayType() {
-            switch (token) {
-                case 117:
-                case 132:
-                case 130:
-                case 120:
-                case 133:
-                case 135:
-                case 127:
-                    var node = tryParse(parseKeywordAndNoDot);
-                    return node || parseTypeReference();
-                case 9:
-                    return parseStringLiteralTypeNode();
-                case 103:
-                case 93:
-                    return parseTokenNode();
-                case 97: {
-                    var thisKeyword = parseThisTypeNode();
-                    if (token === 124 && !scanner.hasPrecedingLineBreak()) {
-                        return parseThisTypePredicate(thisKeyword);
-                    }
-                    else {
-                        return thisKeyword;
-                    }
-                }
-                case 101:
-                    return parseTypeQuery();
-                case 15:
-                    return parseTypeLiteral();
-                case 19:
-                    return parseTupleType();
-                case 17:
-                    return parseParenthesizedType();
-                default:
-                    return parseTypeReference();
-            }
-        }
-        function isStartOfType() {
-            switch (token) {
-                case 117:
-                case 132:
-                case 130:
-                case 120:
-                case 133:
-                case 103:
-                case 135:
-                case 93:
-                case 97:
-                case 101:
-                case 127:
-                case 15:
-                case 19:
-                case 25:
-                case 92:
-                case 9:
-                    return true;
-                case 17:
-                    return lookAhead(isStartOfParenthesizedOrFunctionType);
-                default:
-                    return isIdentifier();
-            }
-        }
-        function isStartOfParenthesizedOrFunctionType() {
-            nextToken();
-            return token === 18 || isStartOfParameter() || isStartOfType();
-        }
-        function parseArrayTypeOrHigher() {
-            var type = parseNonArrayType();
-            while (!scanner.hasPrecedingLineBreak() && parseOptional(19)) {
-                parseExpected(20);
-                var node = createNode(160, type.pos);
-                node.elementType = type;
-                type = finishNode(node);
-            }
-            return type;
-        }
-        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
-            var type = parseConstituentType();
-            if (token === operator) {
-                var types = [type];
-                types.pos = type.pos;
-                while (parseOptional(operator)) {
-                    types.push(parseConstituentType());
-                }
-                types.end = getNodeEnd();
-                var node = createNode(kind, type.pos);
-                node.types = types;
-                type = finishNode(node);
-            }
-            return type;
-        }
-        function parseIntersectionTypeOrHigher() {
-            return parseUnionOrIntersectionType(163, parseArrayTypeOrHigher, 46);
-        }
-        function parseUnionTypeOrHigher() {
-            return parseUnionOrIntersectionType(162, parseIntersectionTypeOrHigher, 47);
-        }
-        function isStartOfFunctionType() {
-            if (token === 25) {
-                return true;
-            }
-            return token === 17 && lookAhead(isUnambiguouslyStartOfFunctionType);
-        }
-        function skipParameterStart() {
-            if (ts.isModifierKind(token)) {
-                parseModifiers();
-            }
-            if (isIdentifier() || token === 97) {
-                nextToken();
-                return true;
-            }
-            if (token === 19 || token === 15) {
-                var previousErrorCount = parseDiagnostics.length;
-                parseIdentifierOrPattern();
-                return previousErrorCount === parseDiagnostics.length;
-            }
-            return false;
-        }
-        function isUnambiguouslyStartOfFunctionType() {
-            nextToken();
-            if (token === 18 || token === 22) {
-                return true;
-            }
-            if (skipParameterStart()) {
-                if (token === 54 || token === 24 ||
-                    token === 53 || token === 56) {
-                    return true;
-                }
-                if (token === 18) {
-                    nextToken();
-                    if (token === 34) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function parseTypeOrTypePredicate() {
-            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
-            var type = parseType();
-            if (typePredicateVariable) {
-                var node = createNode(154, typePredicateVariable.pos);
-                node.parameterName = typePredicateVariable;
-                node.type = type;
-                return finishNode(node);
-            }
-            else {
-                return type;
-            }
-        }
-        function parseTypePredicatePrefix() {
-            var id = parseIdentifier();
-            if (token === 124 && !scanner.hasPrecedingLineBreak()) {
-                nextToken();
-                return id;
-            }
-        }
-        function parseType() {
-            return doOutsideOfContext(41943040, parseTypeWorker);
-        }
-        function parseTypeWorker() {
-            if (isStartOfFunctionType()) {
-                return parseFunctionOrConstructorType(156);
-            }
-            if (token === 92) {
-                return parseFunctionOrConstructorType(157);
-            }
-            return parseUnionTypeOrHigher();
-        }
-        function parseTypeAnnotation() {
-            return parseOptional(54) ? parseType() : undefined;
-        }
-        function isStartOfLeftHandSideExpression() {
-            switch (token) {
-                case 97:
-                case 95:
-                case 93:
-                case 99:
-                case 84:
-                case 8:
-                case 9:
-                case 11:
-                case 12:
-                case 17:
-                case 19:
-                case 15:
-                case 87:
-                case 73:
-                case 92:
-                case 39:
-                case 61:
-                case 69:
-                    return true;
-                default:
-                    return isIdentifier();
-            }
-        }
-        function isStartOfExpression() {
-            if (isStartOfLeftHandSideExpression()) {
-                return true;
-            }
-            switch (token) {
-                case 35:
-                case 36:
-                case 50:
-                case 49:
-                case 78:
-                case 101:
-                case 103:
-                case 41:
-                case 42:
-                case 25:
-                case 119:
-                case 114:
-                    return true;
-                default:
-                    if (isBinaryOperator()) {
-                        return true;
-                    }
-                    return isIdentifier();
-            }
-        }
-        function isStartOfExpressionStatement() {
-            return token !== 15 &&
-                token !== 87 &&
-                token !== 73 &&
-                token !== 55 &&
-                isStartOfExpression();
-        }
-        function parseExpression() {
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(false);
-            }
-            var expr = parseAssignmentExpressionOrHigher();
-            var operatorToken;
-            while ((operatorToken = parseOptionalToken(24))) {
-                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
-            }
-            if (saveDecoratorContext) {
-                setDecoratorContext(true);
-            }
-            return expr;
-        }
-        function parseInitializer(inParameter) {
-            if (token !== 56) {
-                if (scanner.hasPrecedingLineBreak() || (inParameter && token === 15) || !isStartOfExpression()) {
-                    return undefined;
-                }
-            }
-            parseExpected(56);
-            return parseAssignmentExpressionOrHigher();
-        }
-        function parseAssignmentExpressionOrHigher() {
-            if (isYieldExpression()) {
-                return parseYieldExpression();
-            }
-            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
-            if (arrowExpression) {
-                return arrowExpression;
-            }
-            var expr = parseBinaryExpressionOrHigher(0);
-            if (expr.kind === 69 && token === 34) {
-                return parseSimpleArrowFunctionExpression(expr);
-            }
-            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
-                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
-            }
-            return parseConditionalExpressionRest(expr);
-        }
-        function isYieldExpression() {
-            if (token === 114) {
-                if (inYieldContext()) {
-                    return true;
-                }
-                return lookAhead(nextTokenIsIdentifierOrKeywordOrNumberOnSameLine);
-            }
-            return false;
-        }
-        function nextTokenIsIdentifierOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && isIdentifier();
-        }
-        function parseYieldExpression() {
-            var node = createNode(190);
-            nextToken();
-            if (!scanner.hasPrecedingLineBreak() &&
-                (token === 37 || isStartOfExpression())) {
-                node.asteriskToken = parseOptionalToken(37);
-                node.expression = parseAssignmentExpressionOrHigher();
-                return finishNode(node);
-            }
-            else {
-                return finishNode(node);
-            }
-        }
-        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
-            ts.Debug.assert(token === 34, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
-            var node;
-            if (asyncModifier) {
-                node = createNode(180, asyncModifier.pos);
-                setModifiers(node, asyncModifier);
-            }
-            else {
-                node = createNode(180, identifier.pos);
-            }
-            var parameter = createNode(142, identifier.pos);
-            parameter.name = identifier;
-            finishNode(parameter);
-            node.parameters = [parameter];
-            node.parameters.pos = parameter.pos;
-            node.parameters.end = parameter.end;
-            node.equalsGreaterThanToken = parseExpectedToken(34, false, ts.Diagnostics._0_expected, "=>");
-            node.body = parseArrowFunctionExpressionBody(!!asyncModifier);
-            return finishNode(node);
-        }
-        function tryParseParenthesizedArrowFunctionExpression() {
-            var triState = isParenthesizedArrowFunctionExpression();
-            if (triState === 0) {
-                return undefined;
-            }
-            var arrowFunction = triState === 1
-                ? parseParenthesizedArrowFunctionExpressionHead(true)
-                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
-            if (!arrowFunction) {
-                return undefined;
-            }
-            var isAsync = !!(arrowFunction.flags & 256);
-            var lastToken = token;
-            arrowFunction.equalsGreaterThanToken = parseExpectedToken(34, false, ts.Diagnostics._0_expected, "=>");
-            arrowFunction.body = (lastToken === 34 || lastToken === 15)
-                ? parseArrowFunctionExpressionBody(isAsync)
-                : parseIdentifier();
-            return finishNode(arrowFunction);
-        }
-        function isParenthesizedArrowFunctionExpression() {
-            if (token === 17 || token === 25 || token === 118) {
-                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
-            }
-            if (token === 34) {
-                return 1;
-            }
-            return 0;
-        }
-        function isParenthesizedArrowFunctionExpressionWorker() {
-            if (token === 118) {
-                nextToken();
-                if (scanner.hasPrecedingLineBreak()) {
-                    return 0;
-                }
-                if (token !== 17 && token !== 25) {
-                    return 0;
-                }
-            }
-            var first = token;
-            var second = nextToken();
-            if (first === 17) {
-                if (second === 18) {
-                    var third = nextToken();
-                    switch (third) {
-                        case 34:
-                        case 54:
-                        case 15:
-                            return 1;
-                        default:
-                            return 0;
-                    }
-                }
-                if (second === 19 || second === 15) {
-                    return 2;
-                }
-                if (second === 22) {
-                    return 1;
-                }
-                if (!isIdentifier()) {
-                    return 0;
-                }
-                if (nextToken() === 54) {
-                    return 1;
-                }
-                return 2;
-            }
-            else {
-                ts.Debug.assert(first === 25);
-                if (!isIdentifier()) {
-                    return 0;
-                }
-                if (sourceFile.languageVariant === 1) {
-                    var isArrowFunctionInJsx = lookAhead(function () {
-                        var third = nextToken();
-                        if (third === 83) {
-                            var fourth = nextToken();
-                            switch (fourth) {
-                                case 56:
-                                case 27:
-                                    return false;
-                                default:
-                                    return true;
-                            }
-                        }
-                        else if (third === 24) {
-                            return true;
-                        }
-                        return false;
-                    });
-                    if (isArrowFunctionInJsx) {
-                        return 1;
-                    }
-                    return 0;
-                }
-                return 2;
-            }
-        }
-        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
-            return parseParenthesizedArrowFunctionExpressionHead(false);
-        }
-        function tryParseAsyncSimpleArrowFunctionExpression() {
-            if (token === 118) {
-                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
-                if (isUnParenthesizedAsyncArrowFunction === 1) {
-                    var asyncModifier = parseModifiersForArrowFunction();
-                    var expr = parseBinaryExpressionOrHigher(0);
-                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
-                }
-            }
-            return undefined;
-        }
-        function isUnParenthesizedAsyncArrowFunctionWorker() {
-            if (token === 118) {
-                nextToken();
-                if (scanner.hasPrecedingLineBreak() || token === 34) {
-                    return 0;
-                }
-                var expr = parseBinaryExpressionOrHigher(0);
-                if (!scanner.hasPrecedingLineBreak() && expr.kind === 69 && token === 34) {
-                    return 1;
-                }
-            }
-            return 0;
-        }
-        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
-            var node = createNode(180);
-            setModifiers(node, parseModifiersForArrowFunction());
-            var isAsync = !!(node.flags & 256);
-            fillSignature(54, false, isAsync, !allowAmbiguity, node);
-            if (!node.parameters) {
-                return undefined;
-            }
-            if (!allowAmbiguity && token !== 34 && token !== 15) {
-                return undefined;
-            }
-            return node;
-        }
-        function parseArrowFunctionExpressionBody(isAsync) {
-            if (token === 15) {
-                return parseFunctionBlock(false, isAsync, false);
-            }
-            if (token !== 23 &&
-                token !== 87 &&
-                token !== 73 &&
-                isStartOfStatement() &&
-                !isStartOfExpressionStatement()) {
-                return parseFunctionBlock(false, isAsync, true);
-            }
-            return isAsync
-                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
-                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
-        }
-        function parseConditionalExpressionRest(leftOperand) {
-            var questionToken = parseOptionalToken(53);
-            if (!questionToken) {
-                return leftOperand;
-            }
-            var node = createNode(188, leftOperand.pos);
-            node.condition = leftOperand;
-            node.questionToken = questionToken;
-            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
-            node.colonToken = parseExpectedToken(54, false, ts.Diagnostics._0_expected, ts.tokenToString(54));
-            node.whenFalse = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
-        }
-        function parseBinaryExpressionOrHigher(precedence) {
-            var leftOperand = parseUnaryExpressionOrHigher();
-            return parseBinaryExpressionRest(precedence, leftOperand);
-        }
-        function isInOrOfKeyword(t) {
-            return t === 90 || t === 138;
-        }
-        function parseBinaryExpressionRest(precedence, leftOperand) {
-            while (true) {
-                reScanGreaterToken();
-                var newPrecedence = getBinaryOperatorPrecedence();
-                var consumeCurrentOperator = token === 38 ?
-                    newPrecedence >= precedence :
-                    newPrecedence > precedence;
-                if (!consumeCurrentOperator) {
-                    break;
-                }
-                if (token === 90 && inDisallowInContext()) {
-                    break;
-                }
-                if (token === 116) {
-                    if (scanner.hasPrecedingLineBreak()) {
-                        break;
-                    }
-                    else {
-                        nextToken();
-                        leftOperand = makeAsExpression(leftOperand, parseType());
-                    }
-                }
-                else {
-                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
-                }
-            }
-            return leftOperand;
-        }
-        function isBinaryOperator() {
-            if (inDisallowInContext() && token === 90) {
-                return false;
-            }
-            return getBinaryOperatorPrecedence() > 0;
-        }
-        function getBinaryOperatorPrecedence() {
-            switch (token) {
-                case 52:
-                    return 1;
-                case 51:
-                    return 2;
-                case 47:
-                    return 3;
-                case 48:
-                    return 4;
-                case 46:
-                    return 5;
-                case 30:
-                case 31:
-                case 32:
-                case 33:
-                    return 6;
-                case 25:
-                case 27:
-                case 28:
-                case 29:
-                case 91:
-                case 90:
-                case 116:
-                    return 7;
-                case 43:
-                case 44:
-                case 45:
-                    return 8;
-                case 35:
-                case 36:
-                    return 9;
-                case 37:
-                case 39:
-                case 40:
-                    return 10;
-                case 38:
-                    return 11;
-            }
-            return -1;
-        }
-        function makeBinaryExpression(left, operatorToken, right) {
-            var node = createNode(187, left.pos);
-            node.left = left;
-            node.operatorToken = operatorToken;
-            node.right = right;
-            return finishNode(node);
-        }
-        function makeAsExpression(left, right) {
-            var node = createNode(195, left.pos);
-            node.expression = left;
-            node.type = right;
-            return finishNode(node);
-        }
-        function parsePrefixUnaryExpression() {
-            var node = createNode(185);
-            node.operator = token;
-            nextToken();
-            node.operand = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseDeleteExpression() {
-            var node = createNode(181);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseTypeOfExpression() {
-            var node = createNode(182);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseVoidExpression() {
-            var node = createNode(183);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function isAwaitExpression() {
-            if (token === 119) {
-                if (inAwaitContext()) {
-                    return true;
-                }
-                return lookAhead(nextTokenIsIdentifierOnSameLine);
-            }
-            return false;
-        }
-        function parseAwaitExpression() {
-            var node = createNode(184);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseUnaryExpressionOrHigher() {
-            if (isAwaitExpression()) {
-                return parseAwaitExpression();
-            }
-            if (isIncrementExpression()) {
-                var incrementExpression = parseIncrementExpression();
-                return token === 38 ?
-                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), incrementExpression) :
-                    incrementExpression;
-            }
-            var unaryOperator = token;
-            var simpleUnaryExpression = parseSimpleUnaryExpression();
-            if (token === 38) {
-                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
-                if (simpleUnaryExpression.kind === 177) {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
-                }
-                else {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
-                }
-            }
-            return simpleUnaryExpression;
-        }
-        function parseSimpleUnaryExpression() {
-            switch (token) {
-                case 35:
-                case 36:
-                case 50:
-                case 49:
-                    return parsePrefixUnaryExpression();
-                case 78:
-                    return parseDeleteExpression();
-                case 101:
-                    return parseTypeOfExpression();
-                case 103:
-                    return parseVoidExpression();
-                case 25:
-                    return parseTypeAssertion();
-                default:
-                    return parseIncrementExpression();
-            }
-        }
-        function isIncrementExpression() {
-            switch (token) {
-                case 35:
-                case 36:
-                case 50:
-                case 49:
-                case 78:
-                case 101:
-                case 103:
-                    return false;
-                case 25:
-                    if (sourceFile.languageVariant !== 1) {
-                        return false;
-                    }
-                default:
-                    return true;
-            }
-        }
-        function parseIncrementExpression() {
-            if (token === 41 || token === 42) {
-                var node = createNode(185);
-                node.operator = token;
-                nextToken();
-                node.operand = parseLeftHandSideExpressionOrHigher();
-                return finishNode(node);
-            }
-            else if (sourceFile.languageVariant === 1 && token === 25 && lookAhead(nextTokenIsIdentifierOrKeyword)) {
-                return parseJsxElementOrSelfClosingElement(true);
-            }
-            var expression = parseLeftHandSideExpressionOrHigher();
-            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
-            if ((token === 41 || token === 42) && !scanner.hasPrecedingLineBreak()) {
-                var node = createNode(186, expression.pos);
-                node.operand = expression;
-                node.operator = token;
-                nextToken();
-                return finishNode(node);
-            }
-            return expression;
-        }
-        function parseLeftHandSideExpressionOrHigher() {
-            var expression = token === 95
-                ? parseSuperExpression()
-                : parseMemberExpressionOrHigher();
-            return parseCallExpressionRest(expression);
-        }
-        function parseMemberExpressionOrHigher() {
-            var expression = parsePrimaryExpression();
-            return parseMemberExpressionRest(expression);
-        }
-        function parseSuperExpression() {
-            var expression = parseTokenNode();
-            if (token === 17 || token === 21 || token === 19) {
-                return expression;
-            }
-            var node = createNode(172, expression.pos);
-            node.expression = expression;
-            node.dotToken = parseExpectedToken(21, false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
-            node.name = parseRightSideOfDot(true);
-            return finishNode(node);
-        }
-        function tagNamesAreEquivalent(lhs, rhs) {
-            if (lhs.kind !== rhs.kind) {
-                return false;
-            }
-            if (lhs.kind === 69) {
-                return lhs.text === rhs.text;
-            }
-            return lhs.right.text === rhs.right.text &&
-                tagNamesAreEquivalent(lhs.left, rhs.left);
-        }
-        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
-            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
-            var result;
-            if (opening.kind === 243) {
-                var node = createNode(241, opening.pos);
-                node.openingElement = opening;
-                node.children = parseJsxChildren(node.openingElement.tagName);
-                node.closingElement = parseJsxClosingElement(inExpressionContext);
-                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
-                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
-                }
-                result = finishNode(node);
-            }
-            else {
-                ts.Debug.assert(opening.kind === 242);
-                result = opening;
-            }
-            if (inExpressionContext && token === 25) {
-                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(true); });
-                if (invalidElement) {
-                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
-                    var badNode = createNode(187, result.pos);
-                    badNode.end = invalidElement.end;
-                    badNode.left = result;
-                    badNode.right = invalidElement;
-                    badNode.operatorToken = createMissingNode(24, false, undefined);
-                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
-                    return badNode;
-                }
-            }
-            return result;
-        }
-        function parseJsxText() {
-            var node = createNode(244, scanner.getStartPos());
-            token = scanner.scanJsxToken();
-            return finishNode(node);
-        }
-        function parseJsxChild() {
-            switch (token) {
-                case 244:
-                    return parseJsxText();
-                case 15:
-                    return parseJsxExpression(false);
-                case 25:
-                    return parseJsxElementOrSelfClosingElement(false);
-            }
-            ts.Debug.fail("Unknown JSX child kind " + token);
-        }
-        function parseJsxChildren(openingTagName) {
-            var result = [];
-            result.pos = scanner.getStartPos();
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << 14;
-            while (true) {
-                token = scanner.reScanJsxToken();
-                if (token === 26) {
-                    break;
-                }
-                else if (token === 1) {
-                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
-                    break;
-                }
-                result.push(parseJsxChild());
-            }
-            result.end = scanner.getTokenPos();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
-            var fullStart = scanner.getStartPos();
-            parseExpected(25);
-            var tagName = parseJsxElementName();
-            var attributes = parseList(13, parseJsxAttribute);
-            var node;
-            if (token === 27) {
-                node = createNode(243, fullStart);
-                scanJsxText();
-            }
-            else {
-                parseExpected(39);
-                if (inExpressionContext) {
-                    parseExpected(27);
-                }
-                else {
-                    parseExpected(27, undefined, false);
-                    scanJsxText();
-                }
-                node = createNode(242, fullStart);
-            }
-            node.tagName = tagName;
-            node.attributes = attributes;
-            return finishNode(node);
-        }
-        function parseJsxElementName() {
-            scanJsxIdentifier();
-            var elementName = parseIdentifierName();
-            while (parseOptional(21)) {
-                scanJsxIdentifier();
-                var node = createNode(139, elementName.pos);
-                node.left = elementName;
-                node.right = parseIdentifierName();
-                elementName = finishNode(node);
-            }
-            return elementName;
-        }
-        function parseJsxExpression(inExpressionContext) {
-            var node = createNode(248);
-            parseExpected(15);
-            if (token !== 16) {
-                node.expression = parseAssignmentExpressionOrHigher();
-            }
-            if (inExpressionContext) {
-                parseExpected(16);
-            }
-            else {
-                parseExpected(16, undefined, false);
-                scanJsxText();
-            }
-            return finishNode(node);
-        }
-        function parseJsxAttribute() {
-            if (token === 15) {
-                return parseJsxSpreadAttribute();
-            }
-            scanJsxIdentifier();
-            var node = createNode(246);
-            node.name = parseIdentifierName();
-            if (parseOptional(56)) {
-                switch (token) {
-                    case 9:
-                        node.initializer = parseLiteralNode();
-                        break;
-                    default:
-                        node.initializer = parseJsxExpression(true);
-                        break;
-                }
-            }
-            return finishNode(node);
-        }
-        function parseJsxSpreadAttribute() {
-            var node = createNode(247);
-            parseExpected(15);
-            parseExpected(22);
-            node.expression = parseExpression();
-            parseExpected(16);
-            return finishNode(node);
-        }
-        function parseJsxClosingElement(inExpressionContext) {
-            var node = createNode(245);
-            parseExpected(26);
-            node.tagName = parseJsxElementName();
-            if (inExpressionContext) {
-                parseExpected(27);
-            }
-            else {
-                parseExpected(27, undefined, false);
-                scanJsxText();
-            }
-            return finishNode(node);
-        }
-        function parseTypeAssertion() {
-            var node = createNode(177);
-            parseExpected(25);
-            node.type = parseType();
-            parseExpected(27);
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseMemberExpressionRest(expression) {
-            while (true) {
-                var dotToken = parseOptionalToken(21);
-                if (dotToken) {
-                    var propertyAccess = createNode(172, expression.pos);
-                    propertyAccess.expression = expression;
-                    propertyAccess.dotToken = dotToken;
-                    propertyAccess.name = parseRightSideOfDot(true);
-                    expression = finishNode(propertyAccess);
-                    continue;
-                }
-                if (token === 49 && !scanner.hasPrecedingLineBreak()) {
-                    nextToken();
-                    var nonNullExpression = createNode(196, expression.pos);
-                    nonNullExpression.expression = expression;
-                    expression = finishNode(nonNullExpression);
-                    continue;
-                }
-                if (!inDecoratorContext() && parseOptional(19)) {
-                    var indexedAccess = createNode(173, expression.pos);
-                    indexedAccess.expression = expression;
-                    if (token !== 20) {
-                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
-                        if (indexedAccess.argumentExpression.kind === 9 || indexedAccess.argumentExpression.kind === 8) {
-                            var literal = indexedAccess.argumentExpression;
-                            literal.text = internIdentifier(literal.text);
-                        }
-                    }
-                    parseExpected(20);
-                    expression = finishNode(indexedAccess);
-                    continue;
-                }
-                if (token === 11 || token === 12) {
-                    var tagExpression = createNode(176, expression.pos);
-                    tagExpression.tag = expression;
-                    tagExpression.template = token === 11
-                        ? parseLiteralNode()
-                        : parseTemplateExpression();
-                    expression = finishNode(tagExpression);
-                    continue;
-                }
-                return expression;
-            }
-        }
-        function parseCallExpressionRest(expression) {
-            while (true) {
-                expression = parseMemberExpressionRest(expression);
-                if (token === 25) {
-                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
-                    if (!typeArguments) {
-                        return expression;
-                    }
-                    var callExpr = createNode(174, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.typeArguments = typeArguments;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
-                }
-                else if (token === 17) {
-                    var callExpr = createNode(174, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
-                }
-                return expression;
-            }
-        }
-        function parseArgumentList() {
-            parseExpected(17);
-            var result = parseDelimitedList(11, parseArgumentExpression);
-            parseExpected(18);
-            return result;
-        }
-        function parseTypeArgumentsInExpression() {
-            if (!parseOptional(25)) {
-                return undefined;
-            }
-            var typeArguments = parseDelimitedList(18, parseType);
-            if (!parseExpected(27)) {
-                return undefined;
-            }
-            return typeArguments && canFollowTypeArgumentsInExpression()
-                ? typeArguments
-                : undefined;
-        }
-        function canFollowTypeArgumentsInExpression() {
-            switch (token) {
-                case 17:
-                case 21:
-                case 18:
-                case 20:
-                case 54:
-                case 23:
-                case 53:
-                case 30:
-                case 32:
-                case 31:
-                case 33:
-                case 51:
-                case 52:
-                case 48:
-                case 46:
-                case 47:
-                case 16:
-                case 1:
-                    return true;
-                case 24:
-                case 15:
-                default:
-                    return false;
-            }
-        }
-        function parsePrimaryExpression() {
-            switch (token) {
-                case 8:
-                case 9:
-                case 11:
-                    return parseLiteralNode();
-                case 97:
-                case 95:
-                case 93:
-                case 99:
-                case 84:
-                    return parseTokenNode();
-                case 17:
-                    return parseParenthesizedExpression();
-                case 19:
-                    return parseArrayLiteralExpression();
-                case 15:
-                    return parseObjectLiteralExpression();
-                case 118:
-                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
-                        break;
-                    }
-                    return parseFunctionExpression();
-                case 73:
-                    return parseClassExpression();
-                case 87:
-                    return parseFunctionExpression();
-                case 92:
-                    return parseNewExpression();
-                case 39:
-                case 61:
-                    if (reScanSlashToken() === 10) {
-                        return parseLiteralNode();
-                    }
-                    break;
-                case 12:
-                    return parseTemplateExpression();
-            }
-            return parseIdentifier(ts.Diagnostics.Expression_expected);
-        }
-        function parseParenthesizedExpression() {
-            var node = createNode(178);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            return finishNode(node);
-        }
-        function parseSpreadElement() {
-            var node = createNode(191);
-            parseExpected(22);
-            node.expression = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
-        }
-        function parseArgumentOrArrayLiteralElement() {
-            return token === 22 ? parseSpreadElement() :
-                token === 24 ? createNode(193) :
-                    parseAssignmentExpressionOrHigher();
-        }
-        function parseArgumentExpression() {
-            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
-        }
-        function parseArrayLiteralExpression() {
-            var node = createNode(170);
-            parseExpected(19);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.elements = parseDelimitedList(15, parseArgumentOrArrayLiteralElement);
-            parseExpected(20);
-            return finishNode(node);
-        }
-        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
-            if (parseContextualModifier(123)) {
-                return addJSDocComment(parseAccessorDeclaration(149, fullStart, decorators, modifiers));
-            }
-            else if (parseContextualModifier(131)) {
-                return parseAccessorDeclaration(150, fullStart, decorators, modifiers);
-            }
-            return undefined;
-        }
-        function parseObjectLiteralElement() {
-            var fullStart = scanner.getStartPos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
-            }
-            var asteriskToken = parseOptionalToken(37);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            var questionToken = parseOptionalToken(53);
-            if (asteriskToken || token === 17 || token === 25) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
-            }
-            var isShorthandPropertyAssignment = tokenIsIdentifier && (token === 24 || token === 16 || token === 56);
-            if (isShorthandPropertyAssignment) {
-                var shorthandDeclaration = createNode(254, fullStart);
-                shorthandDeclaration.name = propertyName;
-                shorthandDeclaration.questionToken = questionToken;
-                var equalsToken = parseOptionalToken(56);
-                if (equalsToken) {
-                    shorthandDeclaration.equalsToken = equalsToken;
-                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                }
-                return addJSDocComment(finishNode(shorthandDeclaration));
-            }
-            else {
-                var propertyAssignment = createNode(253, fullStart);
-                propertyAssignment.modifiers = modifiers;
-                propertyAssignment.name = propertyName;
-                propertyAssignment.questionToken = questionToken;
-                parseExpected(54);
-                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                return addJSDocComment(finishNode(propertyAssignment));
-            }
-        }
-        function parseObjectLiteralExpression() {
-            var node = createNode(171);
-            parseExpected(15);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.properties = parseDelimitedList(12, parseObjectLiteralElement, true);
-            parseExpected(16);
-            return finishNode(node);
-        }
-        function parseFunctionExpression() {
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(false);
-            }
-            var node = createNode(179);
-            setModifiers(node, parseModifiers());
-            parseExpected(87);
-            node.asteriskToken = parseOptionalToken(37);
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = !!(node.flags & 256);
-            node.name =
-                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
-                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
-                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
-                            parseOptionalIdentifier();
-            fillSignature(54, isGenerator, isAsync, false, node);
-            node.body = parseFunctionBlock(isGenerator, isAsync, false);
-            if (saveDecoratorContext) {
-                setDecoratorContext(true);
-            }
-            return addJSDocComment(finishNode(node));
-        }
-        function parseOptionalIdentifier() {
-            return isIdentifier() ? parseIdentifier() : undefined;
-        }
-        function parseNewExpression() {
-            var node = createNode(175);
-            parseExpected(92);
-            node.expression = parseMemberExpressionOrHigher();
-            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
-            if (node.typeArguments || token === 17) {
-                node.arguments = parseArgumentList();
-            }
-            return finishNode(node);
-        }
-        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
-            var node = createNode(199);
-            if (parseExpected(15, diagnosticMessage) || ignoreMissingOpenBrace) {
-                node.statements = parseList(1, parseStatement);
-                parseExpected(16);
-            }
-            else {
-                node.statements = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
-            var savedYieldContext = inYieldContext();
-            setYieldContext(allowYield);
-            var savedAwaitContext = inAwaitContext();
-            setAwaitContext(allowAwait);
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(false);
-            }
-            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
-            if (saveDecoratorContext) {
-                setDecoratorContext(true);
-            }
-            setYieldContext(savedYieldContext);
-            setAwaitContext(savedAwaitContext);
-            return block;
-        }
-        function parseEmptyStatement() {
-            var node = createNode(201);
-            parseExpected(23);
-            return finishNode(node);
-        }
-        function parseIfStatement() {
-            var node = createNode(203);
-            parseExpected(88);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            node.thenStatement = parseStatement();
-            node.elseStatement = parseOptional(80) ? parseStatement() : undefined;
-            return finishNode(node);
-        }
-        function parseDoStatement() {
-            var node = createNode(204);
-            parseExpected(79);
-            node.statement = parseStatement();
-            parseExpected(104);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            parseOptional(23);
-            return finishNode(node);
-        }
-        function parseWhileStatement() {
-            var node = createNode(205);
-            parseExpected(104);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            node.statement = parseStatement();
-            return finishNode(node);
-        }
-        function parseForOrForInOrForOfStatement() {
-            var pos = getNodePos();
-            parseExpected(86);
-            parseExpected(17);
-            var initializer = undefined;
-            if (token !== 23) {
-                if (token === 102 || token === 108 || token === 74) {
-                    initializer = parseVariableDeclarationList(true);
-                }
-                else {
-                    initializer = disallowInAnd(parseExpression);
-                }
-            }
-            var forOrForInOrForOfStatement;
-            if (parseOptional(90)) {
-                var forInStatement = createNode(207, pos);
-                forInStatement.initializer = initializer;
-                forInStatement.expression = allowInAnd(parseExpression);
-                parseExpected(18);
-                forOrForInOrForOfStatement = forInStatement;
-            }
-            else if (parseOptional(138)) {
-                var forOfStatement = createNode(208, pos);
-                forOfStatement.initializer = initializer;
-                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
-                parseExpected(18);
-                forOrForInOrForOfStatement = forOfStatement;
-            }
-            else {
-                var forStatement = createNode(206, pos);
-                forStatement.initializer = initializer;
-                parseExpected(23);
-                if (token !== 23 && token !== 18) {
-                    forStatement.condition = allowInAnd(parseExpression);
-                }
-                parseExpected(23);
-                if (token !== 18) {
-                    forStatement.incrementor = allowInAnd(parseExpression);
-                }
-                parseExpected(18);
-                forOrForInOrForOfStatement = forStatement;
-            }
-            forOrForInOrForOfStatement.statement = parseStatement();
-            return finishNode(forOrForInOrForOfStatement);
-        }
-        function parseBreakOrContinueStatement(kind) {
-            var node = createNode(kind);
-            parseExpected(kind === 210 ? 70 : 75);
-            if (!canParseSemicolon()) {
-                node.label = parseIdentifier();
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseReturnStatement() {
-            var node = createNode(211);
-            parseExpected(94);
-            if (!canParseSemicolon()) {
-                node.expression = allowInAnd(parseExpression);
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseWithStatement() {
-            var node = createNode(212);
-            parseExpected(105);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            node.statement = parseStatement();
-            return finishNode(node);
-        }
-        function parseCaseClause() {
-            var node = createNode(249);
-            parseExpected(71);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(54);
-            node.statements = parseList(3, parseStatement);
-            return finishNode(node);
-        }
-        function parseDefaultClause() {
-            var node = createNode(250);
-            parseExpected(77);
-            parseExpected(54);
-            node.statements = parseList(3, parseStatement);
-            return finishNode(node);
-        }
-        function parseCaseOrDefaultClause() {
-            return token === 71 ? parseCaseClause() : parseDefaultClause();
-        }
-        function parseSwitchStatement() {
-            var node = createNode(213);
-            parseExpected(96);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            var caseBlock = createNode(227, scanner.getStartPos());
-            parseExpected(15);
-            caseBlock.clauses = parseList(2, parseCaseOrDefaultClause);
-            parseExpected(16);
-            node.caseBlock = finishNode(caseBlock);
-            return finishNode(node);
-        }
-        function parseThrowStatement() {
-            var node = createNode(215);
-            parseExpected(98);
-            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseTryStatement() {
-            var node = createNode(216);
-            parseExpected(100);
-            node.tryBlock = parseBlock(false);
-            node.catchClause = token === 72 ? parseCatchClause() : undefined;
-            if (!node.catchClause || token === 85) {
-                parseExpected(85);
-                node.finallyBlock = parseBlock(false);
-            }
-            return finishNode(node);
-        }
-        function parseCatchClause() {
-            var result = createNode(252);
-            parseExpected(72);
-            if (parseExpected(17)) {
-                result.variableDeclaration = parseVariableDeclaration();
-            }
-            parseExpected(18);
-            result.block = parseBlock(false);
-            return finishNode(result);
-        }
-        function parseDebuggerStatement() {
-            var node = createNode(217);
-            parseExpected(76);
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseExpressionOrLabeledStatement() {
-            var fullStart = scanner.getStartPos();
-            var expression = allowInAnd(parseExpression);
-            if (expression.kind === 69 && parseOptional(54)) {
-                var labeledStatement = createNode(214, fullStart);
-                labeledStatement.label = expression;
-                labeledStatement.statement = parseStatement();
-                return addJSDocComment(finishNode(labeledStatement));
-            }
-            else {
-                var expressionStatement = createNode(202, fullStart);
-                expressionStatement.expression = expression;
-                parseSemicolon();
-                return addJSDocComment(finishNode(expressionStatement));
-            }
-        }
-        function nextTokenIsIdentifierOrKeywordOnSameLine() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token) && !scanner.hasPrecedingLineBreak();
-        }
-        function nextTokenIsFunctionKeywordOnSameLine() {
-            nextToken();
-            return token === 87 && !scanner.hasPrecedingLineBreak();
-        }
-        function nextTokenIsIdentifierOrKeywordOrNumberOnSameLine() {
-            nextToken();
-            return (ts.tokenIsIdentifierOrKeyword(token) || token === 8) && !scanner.hasPrecedingLineBreak();
-        }
-        function isDeclaration() {
-            while (true) {
-                switch (token) {
-                    case 102:
-                    case 108:
-                    case 74:
-                    case 87:
-                    case 73:
-                    case 81:
-                        return true;
-                    case 107:
-                    case 134:
-                        return nextTokenIsIdentifierOnSameLine();
-                    case 125:
-                    case 126:
-                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
-                    case 115:
-                    case 118:
-                    case 122:
-                    case 110:
-                    case 111:
-                    case 112:
-                    case 128:
-                        nextToken();
-                        if (scanner.hasPrecedingLineBreak()) {
-                            return false;
-                        }
-                        continue;
-                    case 137:
-                        nextToken();
-                        return token === 15 || token === 69 || token === 82;
-                    case 89:
-                        nextToken();
-                        return token === 9 || token === 37 ||
-                            token === 15 || ts.tokenIsIdentifierOrKeyword(token);
-                    case 82:
-                        nextToken();
-                        if (token === 56 || token === 37 ||
-                            token === 15 || token === 77 ||
-                            token === 116) {
-                            return true;
-                        }
-                        continue;
-                    case 113:
-                        nextToken();
-                        continue;
-                    default:
-                        return false;
-                }
-            }
-        }
-        function isStartOfDeclaration() {
-            return lookAhead(isDeclaration);
-        }
-        function isStartOfStatement() {
-            switch (token) {
-                case 55:
-                case 23:
-                case 15:
-                case 102:
-                case 108:
-                case 87:
-                case 73:
-                case 81:
-                case 88:
-                case 79:
-                case 104:
-                case 86:
-                case 75:
-                case 70:
-                case 94:
-                case 105:
-                case 96:
-                case 98:
-                case 100:
-                case 76:
-                case 72:
-                case 85:
-                    return true;
-                case 74:
-                case 82:
-                case 89:
-                    return isStartOfDeclaration();
-                case 118:
-                case 122:
-                case 107:
-                case 125:
-                case 126:
-                case 134:
-                case 137:
-                    return true;
-                case 112:
-                case 110:
-                case 111:
-                case 113:
-                case 128:
-                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                default:
-                    return isStartOfExpression();
-            }
-        }
-        function nextTokenIsIdentifierOrStartOfDestructuring() {
-            nextToken();
-            return isIdentifier() || token === 15 || token === 19;
-        }
-        function isLetDeclaration() {
-            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
-        }
-        function parseStatement() {
-            switch (token) {
-                case 23:
-                    return parseEmptyStatement();
-                case 15:
-                    return parseBlock(false);
-                case 102:
-                    return parseVariableStatement(scanner.getStartPos(), undefined, undefined);
-                case 108:
-                    if (isLetDeclaration()) {
-                        return parseVariableStatement(scanner.getStartPos(), undefined, undefined);
-                    }
-                    break;
-                case 87:
-                    return parseFunctionDeclaration(scanner.getStartPos(), undefined, undefined);
-                case 73:
-                    return parseClassDeclaration(scanner.getStartPos(), undefined, undefined);
-                case 88:
-                    return parseIfStatement();
-                case 79:
-                    return parseDoStatement();
-                case 104:
-                    return parseWhileStatement();
-                case 86:
-                    return parseForOrForInOrForOfStatement();
-                case 75:
-                    return parseBreakOrContinueStatement(209);
-                case 70:
-                    return parseBreakOrContinueStatement(210);
-                case 94:
-                    return parseReturnStatement();
-                case 105:
-                    return parseWithStatement();
-                case 96:
-                    return parseSwitchStatement();
-                case 98:
-                    return parseThrowStatement();
-                case 100:
-                case 72:
-                case 85:
-                    return parseTryStatement();
-                case 76:
-                    return parseDebuggerStatement();
-                case 55:
-                    return parseDeclaration();
-                case 118:
-                case 107:
-                case 134:
-                case 125:
-                case 126:
-                case 122:
-                case 74:
-                case 81:
-                case 82:
-                case 89:
-                case 110:
-                case 111:
-                case 112:
-                case 115:
-                case 113:
-                case 128:
-                case 137:
-                    if (isStartOfDeclaration()) {
-                        return parseDeclaration();
-                    }
-                    break;
-            }
-            return parseExpressionOrLabeledStatement();
-        }
-        function parseDeclaration() {
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            switch (token) {
-                case 102:
-                case 108:
-                case 74:
-                    return parseVariableStatement(fullStart, decorators, modifiers);
-                case 87:
-                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
-                case 73:
-                    return parseClassDeclaration(fullStart, decorators, modifiers);
-                case 107:
-                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
-                case 134:
-                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
-                case 81:
-                    return parseEnumDeclaration(fullStart, decorators, modifiers);
-                case 137:
-                case 125:
-                case 126:
-                    return parseModuleDeclaration(fullStart, decorators, modifiers);
-                case 89:
-                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
-                case 82:
-                    nextToken();
-                    switch (token) {
-                        case 77:
-                        case 56:
-                            return parseExportAssignment(fullStart, decorators, modifiers);
-                        case 116:
-                            return parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers);
-                        default:
-                            return parseExportDeclaration(fullStart, decorators, modifiers);
-                    }
-                default:
-                    if (decorators || modifiers) {
-                        var node = createMissingNode(239, true, ts.Diagnostics.Declaration_expected);
-                        node.pos = fullStart;
-                        node.decorators = decorators;
-                        setModifiers(node, modifiers);
-                        return finishNode(node);
-                    }
-            }
-        }
-        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token === 9);
-        }
-        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
-            if (token !== 15 && canParseSemicolon()) {
-                parseSemicolon();
-                return;
-            }
-            return parseFunctionBlock(isGenerator, isAsync, false, diagnosticMessage);
-        }
-        function parseArrayBindingElement() {
-            if (token === 24) {
-                return createNode(193);
-            }
-            var node = createNode(169);
-            node.dotDotDotToken = parseOptionalToken(22);
-            node.name = parseIdentifierOrPattern();
-            node.initializer = parseBindingElementInitializer(false);
-            return finishNode(node);
-        }
-        function parseObjectBindingElement() {
-            var node = createNode(169);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            if (tokenIsIdentifier && token !== 54) {
-                node.name = propertyName;
-            }
-            else {
-                parseExpected(54);
-                node.propertyName = propertyName;
-                node.name = parseIdentifierOrPattern();
-            }
-            node.initializer = parseBindingElementInitializer(false);
-            return finishNode(node);
-        }
-        function parseObjectBindingPattern() {
-            var node = createNode(167);
-            parseExpected(15);
-            node.elements = parseDelimitedList(9, parseObjectBindingElement);
-            parseExpected(16);
-            return finishNode(node);
-        }
-        function parseArrayBindingPattern() {
-            var node = createNode(168);
-            parseExpected(19);
-            node.elements = parseDelimitedList(10, parseArrayBindingElement);
-            parseExpected(20);
-            return finishNode(node);
-        }
-        function isIdentifierOrPattern() {
-            return token === 15 || token === 19 || isIdentifier();
-        }
-        function parseIdentifierOrPattern() {
-            if (token === 19) {
-                return parseArrayBindingPattern();
-            }
-            if (token === 15) {
-                return parseObjectBindingPattern();
-            }
-            return parseIdentifier();
-        }
-        function parseVariableDeclaration() {
-            var node = createNode(218);
-            node.name = parseIdentifierOrPattern();
-            node.type = parseTypeAnnotation();
-            if (!isInOrOfKeyword(token)) {
-                node.initializer = parseInitializer(false);
-            }
-            return finishNode(node);
-        }
-        function parseVariableDeclarationList(inForStatementInitializer) {
-            var node = createNode(219);
-            switch (token) {
-                case 102:
-                    break;
-                case 108:
-                    node.flags |= 1024;
-                    break;
-                case 74:
-                    node.flags |= 2048;
-                    break;
-                default:
-                    ts.Debug.fail();
-            }
-            nextToken();
-            if (token === 138 && lookAhead(canFollowContextualOfKeyword)) {
-                node.declarations = createMissingList();
-            }
-            else {
-                var savedDisallowIn = inDisallowInContext();
-                setDisallowInContext(inForStatementInitializer);
-                node.declarations = parseDelimitedList(8, parseVariableDeclaration);
-                setDisallowInContext(savedDisallowIn);
-            }
-            return finishNode(node);
-        }
-        function canFollowContextualOfKeyword() {
-            return nextTokenIsIdentifier() && nextToken() === 18;
-        }
-        function parseVariableStatement(fullStart, decorators, modifiers) {
-            var node = createNode(200, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.declarationList = parseVariableDeclarationList(false);
-            parseSemicolon();
-            return addJSDocComment(finishNode(node));
-        }
-        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(220, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(87);
-            node.asteriskToken = parseOptionalToken(37);
-            node.name = node.flags & 512 ? parseOptionalIdentifier() : parseIdentifier();
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = !!(node.flags & 256);
-            fillSignature(54, isGenerator, isAsync, false, node);
-            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
-        }
-        function parseConstructorDeclaration(pos, decorators, modifiers) {
-            var node = createNode(148, pos);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(121);
-            fillSignature(54, false, false, false, node);
-            node.body = parseFunctionBlockOrSemicolon(false, false, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
-        }
-        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
-            var method = createNode(147, fullStart);
-            method.decorators = decorators;
-            setModifiers(method, modifiers);
-            method.asteriskToken = asteriskToken;
-            method.name = name;
-            method.questionToken = questionToken;
-            var isGenerator = !!asteriskToken;
-            var isAsync = !!(method.flags & 256);
-            fillSignature(54, isGenerator, isAsync, false, method);
-            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
-            return addJSDocComment(finishNode(method));
-        }
-        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
-            var property = createNode(145, fullStart);
-            property.decorators = decorators;
-            setModifiers(property, modifiers);
-            property.name = name;
-            property.questionToken = questionToken;
-            property.type = parseTypeAnnotation();
-            property.initializer = modifiers && modifiers.flags & 32
-                ? allowInAnd(parseNonParameterInitializer)
-                : doOutsideOfContext(8388608 | 4194304, parseNonParameterInitializer);
-            parseSemicolon();
-            return finishNode(property);
-        }
-        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
-            var asteriskToken = parseOptionalToken(37);
-            var name = parsePropertyName();
-            var questionToken = parseOptionalToken(53);
-            if (asteriskToken || token === 17 || token === 25) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
-            }
-            else {
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
-            }
-        }
-        function parseNonParameterInitializer() {
-            return parseInitializer(false);
-        }
-        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.name = parsePropertyName();
-            fillSignature(54, false, false, false, node);
-            node.body = parseFunctionBlockOrSemicolon(false, false);
-            return finishNode(node);
-        }
-        function isClassMemberModifier(idToken) {
-            switch (idToken) {
-                case 112:
-                case 110:
-                case 111:
-                case 113:
-                case 128:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-        function isClassMemberStart() {
-            var idToken;
-            if (token === 55) {
-                return true;
-            }
-            while (ts.isModifierKind(token)) {
-                idToken = token;
-                if (isClassMemberModifier(idToken)) {
-                    return true;
-                }
-                nextToken();
-            }
-            if (token === 37) {
-                return true;
-            }
-            if (isLiteralPropertyName()) {
-                idToken = token;
-                nextToken();
-            }
-            if (token === 19) {
-                return true;
-            }
-            if (idToken !== undefined) {
-                if (!ts.isKeyword(idToken) || idToken === 131 || idToken === 123) {
-                    return true;
-                }
-                switch (token) {
-                    case 17:
-                    case 25:
-                    case 54:
-                    case 56:
-                    case 53:
-                        return true;
-                    default:
-                        return canParseSemicolon();
-                }
-            }
-            return false;
-        }
-        function parseDecorators() {
-            var decorators;
-            while (true) {
-                var decoratorStart = getNodePos();
-                if (!parseOptional(55)) {
-                    break;
-                }
-                if (!decorators) {
-                    decorators = [];
-                    decorators.pos = decoratorStart;
-                }
-                var decorator = createNode(143, decoratorStart);
-                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
-                decorators.push(finishNode(decorator));
-            }
-            if (decorators) {
-                decorators.end = getNodeEnd();
-            }
-            return decorators;
-        }
-        function parseModifiers(permitInvalidConstAsModifier) {
-            var flags = 0;
-            var modifiers;
-            while (true) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token;
-                if (token === 74 && permitInvalidConstAsModifier) {
-                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
-                        break;
-                    }
-                }
-                else {
-                    if (!parseAnyContextualModifier()) {
-                        break;
-                    }
-                }
-                if (!modifiers) {
-                    modifiers = [];
-                    modifiers.pos = modifierStart;
-                }
-                flags |= ts.modifierToFlag(modifierKind);
-                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
-            }
-            if (modifiers) {
-                modifiers.flags = flags;
-                modifiers.end = scanner.getStartPos();
-            }
-            return modifiers;
-        }
-        function parseModifiersForArrowFunction() {
-            var flags = 0;
-            var modifiers;
-            if (token === 118) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token;
-                nextToken();
-                modifiers = [];
-                modifiers.pos = modifierStart;
-                flags |= ts.modifierToFlag(modifierKind);
-                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
-                modifiers.flags = flags;
-                modifiers.end = scanner.getStartPos();
-            }
-            return modifiers;
-        }
-        function parseClassElement() {
-            if (token === 23) {
-                var result = createNode(198);
-                nextToken();
-                return finishNode(result);
-            }
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers(true);
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
-            }
-            if (token === 121) {
-                return parseConstructorDeclaration(fullStart, decorators, modifiers);
-            }
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
-            }
-            if (ts.tokenIsIdentifierOrKeyword(token) ||
-                token === 9 ||
-                token === 8 ||
-                token === 37 ||
-                token === 19) {
-                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
-            }
-            if (decorators || modifiers) {
-                var name_7 = createMissingNode(69, true, ts.Diagnostics.Declaration_expected);
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_7, undefined);
-            }
-            ts.Debug.fail("Should not have attempted to parse class member declaration.");
-        }
-        function parseClassExpression() {
-            return parseClassDeclarationOrExpression(scanner.getStartPos(), undefined, undefined, 192);
-        }
-        function parseClassDeclaration(fullStart, decorators, modifiers) {
-            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 221);
-        }
-        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(73);
-            node.name = parseNameOfClassDeclarationOrExpression();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(true);
-            if (parseExpected(15)) {
-                node.members = parseClassMembers();
-                parseExpected(16);
-            }
-            else {
-                node.members = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseNameOfClassDeclarationOrExpression() {
-            return isIdentifier() && !isImplementsClause()
-                ? parseIdentifier()
-                : undefined;
-        }
-        function isImplementsClause() {
-            return token === 106 && lookAhead(nextTokenIsIdentifierOrKeyword);
-        }
-        function parseHeritageClauses(isClassHeritageClause) {
-            if (isHeritageClause()) {
-                return parseList(20, parseHeritageClause);
-            }
-            return undefined;
-        }
-        function parseHeritageClause() {
-            if (token === 83 || token === 106) {
-                var node = createNode(251);
-                node.token = token;
-                nextToken();
-                node.types = parseDelimitedList(7, parseExpressionWithTypeArguments);
-                return finishNode(node);
-            }
-            return undefined;
-        }
-        function parseExpressionWithTypeArguments() {
-            var node = createNode(194);
-            node.expression = parseLeftHandSideExpressionOrHigher();
-            if (token === 25) {
-                node.typeArguments = parseBracketedList(18, parseType, 25, 27);
-            }
-            return finishNode(node);
-        }
-        function isHeritageClause() {
-            return token === 83 || token === 106;
-        }
-        function parseClassMembers() {
-            return parseList(5, parseClassElement);
-        }
-        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(222, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(107);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(false);
-            node.members = parseObjectTypeMembers();
-            return finishNode(node);
-        }
-        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(223, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(134);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            parseExpected(56);
-            node.type = parseType();
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseEnumMember() {
-            var node = createNode(255, scanner.getStartPos());
-            node.name = parsePropertyName();
-            node.initializer = allowInAnd(parseNonParameterInitializer);
-            return finishNode(node);
-        }
-        function parseEnumDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(224, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(81);
-            node.name = parseIdentifier();
-            if (parseExpected(15)) {
-                node.members = parseDelimitedList(6, parseEnumMember);
-                parseExpected(16);
-            }
-            else {
-                node.members = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseModuleBlock() {
-            var node = createNode(226, scanner.getStartPos());
-            if (parseExpected(15)) {
-                node.statements = parseList(1, parseStatement);
-                parseExpected(16);
-            }
-            else {
-                node.statements = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
-            var node = createNode(225, fullStart);
-            var namespaceFlag = flags & 4096;
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.flags |= flags;
-            node.name = parseIdentifier();
-            node.body = parseOptional(21)
-                ? parseModuleOrNamespaceDeclaration(getNodePos(), undefined, undefined, 1 | namespaceFlag)
-                : parseModuleBlock();
-            return finishNode(node);
-        }
-        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(225, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (token === 137) {
-                node.name = parseIdentifier();
-                node.flags |= 131072;
-            }
-            else {
-                node.name = parseLiteralNode(true);
-            }
-            node.body = parseModuleBlock();
-            return finishNode(node);
-        }
-        function parseModuleDeclaration(fullStart, decorators, modifiers) {
-            var flags = modifiers ? modifiers.flags : 0;
-            if (token === 137) {
-                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
-            }
-            else if (parseOptional(126)) {
-                flags |= 4096;
-            }
-            else {
-                parseExpected(125);
-                if (token === 9) {
-                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
-                }
-            }
-            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
-        }
-        function isExternalModuleReference() {
-            return token === 129 &&
-                lookAhead(nextTokenIsOpenParen);
-        }
-        function nextTokenIsOpenParen() {
-            return nextToken() === 17;
-        }
-        function nextTokenIsSlash() {
-            return nextToken() === 39;
-        }
-        function parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers) {
-            var exportDeclaration = createNode(228, fullStart);
-            exportDeclaration.decorators = decorators;
-            exportDeclaration.modifiers = modifiers;
-            parseExpected(116);
-            parseExpected(126);
-            exportDeclaration.name = parseIdentifier();
-            parseExpected(23);
-            return finishNode(exportDeclaration);
-        }
-        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
-            parseExpected(89);
-            var afterImportPos = scanner.getStartPos();
-            var identifier;
-            if (isIdentifier()) {
-                identifier = parseIdentifier();
-                if (token !== 24 && token !== 136) {
-                    var importEqualsDeclaration = createNode(229, fullStart);
-                    importEqualsDeclaration.decorators = decorators;
-                    setModifiers(importEqualsDeclaration, modifiers);
-                    importEqualsDeclaration.name = identifier;
-                    parseExpected(56);
-                    importEqualsDeclaration.moduleReference = parseModuleReference();
-                    parseSemicolon();
-                    return finishNode(importEqualsDeclaration);
-                }
-            }
-            var importDeclaration = createNode(230, fullStart);
-            importDeclaration.decorators = decorators;
-            setModifiers(importDeclaration, modifiers);
-            if (identifier ||
-                token === 37 ||
-                token === 15) {
-                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
-                parseExpected(136);
-            }
-            importDeclaration.moduleSpecifier = parseModuleSpecifier();
-            parseSemicolon();
-            return finishNode(importDeclaration);
-        }
-        function parseImportClause(identifier, fullStart) {
-            var importClause = createNode(231, fullStart);
-            if (identifier) {
-                importClause.name = identifier;
-            }
-            if (!importClause.name ||
-                parseOptional(24)) {
-                importClause.namedBindings = token === 37 ? parseNamespaceImport() : parseNamedImportsOrExports(233);
-            }
-            return finishNode(importClause);
-        }
-        function parseModuleReference() {
-            return isExternalModuleReference()
-                ? parseExternalModuleReference()
-                : parseEntityName(false);
-        }
-        function parseExternalModuleReference() {
-            var node = createNode(240);
-            parseExpected(129);
-            parseExpected(17);
-            node.expression = parseModuleSpecifier();
-            parseExpected(18);
-            return finishNode(node);
-        }
-        function parseModuleSpecifier() {
-            if (token === 9) {
-                var result = parseLiteralNode();
-                internIdentifier(result.text);
-                return result;
-            }
-            else {
-                return parseExpression();
-            }
-        }
-        function parseNamespaceImport() {
-            var namespaceImport = createNode(232);
-            parseExpected(37);
-            parseExpected(116);
-            namespaceImport.name = parseIdentifier();
-            return finishNode(namespaceImport);
-        }
-        function parseNamedImportsOrExports(kind) {
-            var node = createNode(kind);
-            node.elements = parseBracketedList(21, kind === 233 ? parseImportSpecifier : parseExportSpecifier, 15, 16);
-            return finishNode(node);
-        }
-        function parseExportSpecifier() {
-            return parseImportOrExportSpecifier(238);
-        }
-        function parseImportSpecifier() {
-            return parseImportOrExportSpecifier(234);
-        }
-        function parseImportOrExportSpecifier(kind) {
-            var node = createNode(kind);
-            var checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
-            var checkIdentifierStart = scanner.getTokenPos();
-            var checkIdentifierEnd = scanner.getTextPos();
-            var identifierName = parseIdentifierName();
-            if (token === 116) {
-                node.propertyName = identifierName;
-                parseExpected(116);
-                checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
-                checkIdentifierStart = scanner.getTokenPos();
-                checkIdentifierEnd = scanner.getTextPos();
-                node.name = parseIdentifierName();
-            }
-            else {
-                node.name = identifierName;
-            }
-            if (kind === 234 && checkIdentifierIsKeyword) {
-                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
-            }
-            return finishNode(node);
-        }
-        function parseExportDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(236, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (parseOptional(37)) {
-                parseExpected(136);
-                node.moduleSpecifier = parseModuleSpecifier();
-            }
-            else {
-                node.exportClause = parseNamedImportsOrExports(237);
-                if (token === 136 || (token === 9 && !scanner.hasPrecedingLineBreak())) {
-                    parseExpected(136);
-                    node.moduleSpecifier = parseModuleSpecifier();
-                }
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseExportAssignment(fullStart, decorators, modifiers) {
-            var node = createNode(235, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (parseOptional(56)) {
-                node.isExportEquals = true;
-            }
-            else {
-                parseExpected(77);
-            }
-            node.expression = parseAssignmentExpressionOrHigher();
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function processReferenceComments(sourceFile) {
-            var triviaScanner = ts.createScanner(sourceFile.languageVersion, false, 0, sourceText);
-            var referencedFiles = [];
-            var typeReferenceDirectives = [];
-            var amdDependencies = [];
-            var amdModuleName;
-            while (true) {
-                var kind = triviaScanner.scan();
-                if (kind !== 2) {
-                    if (ts.isTrivia(kind)) {
-                        continue;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                var range = { pos: triviaScanner.getTokenPos(), end: triviaScanner.getTextPos(), kind: triviaScanner.getToken() };
-                var comment = sourceText.substring(range.pos, range.end);
-                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
-                if (referencePathMatchResult) {
-                    var fileReference = referencePathMatchResult.fileReference;
-                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
-                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
-                    if (fileReference) {
-                        if (referencePathMatchResult.isTypeReferenceDirective) {
-                            typeReferenceDirectives.push(fileReference);
-                        }
-                        else {
-                            referencedFiles.push(fileReference);
-                        }
-                    }
-                    if (diagnosticMessage) {
-                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
-                    }
-                }
-                else {
-                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
-                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
-                    if (amdModuleNameMatchResult) {
-                        if (amdModuleName) {
-                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
-                        }
-                        amdModuleName = amdModuleNameMatchResult[2];
-                    }
-                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
-                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
-                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
-                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
-                    if (amdDependencyMatchResult) {
-                        var pathMatchResult = pathRegex.exec(comment);
-                        var nameMatchResult = nameRegex.exec(comment);
-                        if (pathMatchResult) {
-                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
-                            amdDependencies.push(amdDependency);
-                        }
-                    }
-                }
-            }
-            sourceFile.referencedFiles = referencedFiles;
-            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
-            sourceFile.amdDependencies = amdDependencies;
-            sourceFile.moduleName = amdModuleName;
-        }
-        function setExternalModuleIndicator(sourceFile) {
-            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
-                return node.flags & 1
-                    || node.kind === 229 && node.moduleReference.kind === 240
-                    || node.kind === 230
-                    || node.kind === 235
-                    || node.kind === 236
-                    ? node
-                    : undefined;
-            });
-        }
-        var JSDocParser;
-        (function (JSDocParser) {
-            function isJSDocType() {
-                switch (token) {
-                    case 37:
-                    case 53:
-                    case 17:
-                    case 19:
-                    case 49:
-                    case 15:
-                    case 87:
-                    case 22:
-                    case 92:
-                    case 97:
-                        return true;
-                }
-                return ts.tokenIsIdentifierOrKeyword(token);
-            }
-            JSDocParser.isJSDocType = isJSDocType;
-            function parseJSDocTypeExpressionForTests(content, start, length) {
-                initializeState("file.js", content, 2, undefined, 1);
-                scanner.setText(content, start, length);
-                token = scanner.scan();
-                var jsDocTypeExpression = parseJSDocTypeExpression();
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
-            }
-            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-            function parseJSDocTypeExpression() {
-                var result = createNode(257, scanner.getTokenPos());
-                parseExpected(15);
-                result.type = parseJSDocTopLevelType();
-                parseExpected(16);
-                fixupParentReferences(result);
-                return finishNode(result);
-            }
-            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
-            function parseJSDocTopLevelType() {
-                var type = parseJSDocType();
-                if (token === 47) {
-                    var unionType = createNode(261, type.pos);
-                    unionType.types = parseJSDocTypeList(type);
-                    type = finishNode(unionType);
-                }
-                if (token === 56) {
-                    var optionalType = createNode(268, type.pos);
-                    nextToken();
-                    optionalType.type = type;
-                    type = finishNode(optionalType);
-                }
-                return type;
-            }
-            function parseJSDocType() {
-                var type = parseBasicTypeExpression();
-                while (true) {
-                    if (token === 19) {
-                        var arrayType = createNode(260, type.pos);
-                        arrayType.elementType = type;
-                        nextToken();
-                        parseExpected(20);
-                        type = finishNode(arrayType);
-                    }
-                    else if (token === 53) {
-                        var nullableType = createNode(263, type.pos);
-                        nullableType.type = type;
-                        nextToken();
-                        type = finishNode(nullableType);
-                    }
-                    else if (token === 49) {
-                        var nonNullableType = createNode(264, type.pos);
-                        nonNullableType.type = type;
-                        nextToken();
-                        type = finishNode(nonNullableType);
-                    }
-                    else {
-                        break;
-                    }
-                }
-                return type;
-            }
-            function parseBasicTypeExpression() {
-                switch (token) {
-                    case 37:
-                        return parseJSDocAllType();
-                    case 53:
-                        return parseJSDocUnknownOrNullableType();
-                    case 17:
-                        return parseJSDocUnionType();
-                    case 19:
-                        return parseJSDocTupleType();
-                    case 49:
-                        return parseJSDocNonNullableType();
-                    case 15:
-                        return parseJSDocRecordType();
-                    case 87:
-                        return parseJSDocFunctionType();
-                    case 22:
-                        return parseJSDocVariadicType();
-                    case 92:
-                        return parseJSDocConstructorType();
-                    case 97:
-                        return parseJSDocThisType();
-                    case 117:
-                    case 132:
-                    case 130:
-                    case 120:
-                    case 133:
-                    case 103:
-                        return parseTokenNode();
-                }
-                return parseJSDocTypeReference();
-            }
-            function parseJSDocThisType() {
-                var result = createNode(272);
-                nextToken();
-                parseExpected(54);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocConstructorType() {
-                var result = createNode(271);
-                nextToken();
-                parseExpected(54);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocVariadicType() {
-                var result = createNode(270);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocFunctionType() {
-                var result = createNode(269);
-                nextToken();
-                parseExpected(17);
-                result.parameters = parseDelimitedList(22, parseJSDocParameter);
-                checkForTrailingComma(result.parameters);
-                parseExpected(18);
-                if (token === 54) {
-                    nextToken();
-                    result.type = parseJSDocType();
-                }
-                return finishNode(result);
-            }
-            function parseJSDocParameter() {
-                var parameter = createNode(142);
-                parameter.type = parseJSDocType();
-                if (parseOptional(56)) {
-                    parameter.questionToken = createNode(56);
-                }
-                return finishNode(parameter);
-            }
-            function parseJSDocTypeReference() {
-                var result = createNode(267);
-                result.name = parseSimplePropertyName();
-                if (token === 25) {
-                    result.typeArguments = parseTypeArguments();
-                }
-                else {
-                    while (parseOptional(21)) {
-                        if (token === 25) {
-                            result.typeArguments = parseTypeArguments();
-                            break;
-                        }
-                        else {
-                            result.name = parseQualifiedName(result.name);
-                        }
-                    }
-                }
-                return finishNode(result);
-            }
-            function parseTypeArguments() {
-                nextToken();
-                var typeArguments = parseDelimitedList(23, parseJSDocType);
-                checkForTrailingComma(typeArguments);
-                checkForEmptyTypeArgumentList(typeArguments);
-                parseExpected(27);
-                return typeArguments;
-            }
-            function checkForEmptyTypeArgumentList(typeArguments) {
-                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
-                    var start = typeArguments.pos - "<".length;
-                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
-                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
-                }
-            }
-            function parseQualifiedName(left) {
-                var result = createNode(139, left.pos);
-                result.left = left;
-                result.right = parseIdentifierName();
-                return finishNode(result);
-            }
-            function parseJSDocRecordType() {
-                var result = createNode(265);
-                nextToken();
-                result.members = parseDelimitedList(24, parseJSDocRecordMember);
-                checkForTrailingComma(result.members);
-                parseExpected(16);
-                return finishNode(result);
-            }
-            function parseJSDocRecordMember() {
-                var result = createNode(266);
-                result.name = parseSimplePropertyName();
-                if (token === 54) {
-                    nextToken();
-                    result.type = parseJSDocType();
-                }
-                return finishNode(result);
-            }
-            function parseJSDocNonNullableType() {
-                var result = createNode(264);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocTupleType() {
-                var result = createNode(262);
-                nextToken();
-                result.types = parseDelimitedList(25, parseJSDocType);
-                checkForTrailingComma(result.types);
-                parseExpected(20);
-                return finishNode(result);
-            }
-            function checkForTrailingComma(list) {
-                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
-                    var start = list.end - ",".length;
-                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
-                }
-            }
-            function parseJSDocUnionType() {
-                var result = createNode(261);
-                nextToken();
-                result.types = parseJSDocTypeList(parseJSDocType());
-                parseExpected(18);
-                return finishNode(result);
-            }
-            function parseJSDocTypeList(firstType) {
-                ts.Debug.assert(!!firstType);
-                var types = [];
-                types.pos = firstType.pos;
-                types.push(firstType);
-                while (parseOptional(47)) {
-                    types.push(parseJSDocType());
-                }
-                types.end = scanner.getStartPos();
-                return types;
-            }
-            function parseJSDocAllType() {
-                var result = createNode(258);
-                nextToken();
-                return finishNode(result);
-            }
-            function parseJSDocUnknownOrNullableType() {
-                var pos = scanner.getStartPos();
-                nextToken();
-                if (token === 24 ||
-                    token === 16 ||
-                    token === 18 ||
-                    token === 27 ||
-                    token === 56 ||
-                    token === 47) {
-                    var result = createNode(259, pos);
-                    return finishNode(result);
-                }
-                else {
-                    var result = createNode(263, pos);
-                    result.type = parseJSDocType();
-                    return finishNode(result);
-                }
-            }
-            function parseIsolatedJSDocComment(content, start, length) {
-                initializeState("file.js", content, 2, undefined, 1);
-                sourceFile = { languageVariant: 0, text: content };
-                var jsDocComment = parseJSDocCommentWorker(start, length);
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDocComment ? { jsDocComment: jsDocComment, diagnostics: diagnostics } : undefined;
-            }
-            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-            function parseJSDocComment(parent, start, length) {
-                var saveToken = token;
-                var saveParseDiagnosticsLength = parseDiagnostics.length;
-                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-                var comment = parseJSDocCommentWorker(start, length);
-                if (comment) {
-                    comment.parent = parent;
-                }
-                token = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-                return comment;
-            }
-            JSDocParser.parseJSDocComment = parseJSDocComment;
-            function parseJSDocCommentWorker(start, length) {
-                var content = sourceText;
-                start = start || 0;
-                var end = length === undefined ? content.length : start + length;
-                length = end - start;
-                ts.Debug.assert(start >= 0);
-                ts.Debug.assert(start <= end);
-                ts.Debug.assert(end <= content.length);
-                var tags;
-                var result;
-                if (content.charCodeAt(start) === 47 &&
-                    content.charCodeAt(start + 1) === 42 &&
-                    content.charCodeAt(start + 2) === 42 &&
-                    content.charCodeAt(start + 3) !== 42) {
-                    scanner.scanRange(start + 3, length - 5, function () {
-                        var canParseTag = true;
-                        var seenAsterisk = true;
-                        nextJSDocToken();
-                        while (token !== 1) {
-                            switch (token) {
-                                case 55:
-                                    if (canParseTag) {
-                                        parseTag();
-                                    }
-                                    seenAsterisk = false;
-                                    break;
-                                case 4:
-                                    canParseTag = true;
-                                    seenAsterisk = false;
-                                    break;
-                                case 37:
-                                    if (seenAsterisk) {
-                                        canParseTag = false;
-                                    }
-                                    seenAsterisk = true;
-                                    break;
-                                case 69:
-                                    canParseTag = false;
-                                    break;
-                                case 1:
-                                    break;
-                            }
-                            nextJSDocToken();
-                        }
-                        result = createJSDocComment();
-                    });
-                }
-                return result;
-                function createJSDocComment() {
-                    if (!tags) {
-                        return undefined;
-                    }
-                    var result = createNode(273, start);
-                    result.tags = tags;
-                    return finishNode(result, end);
-                }
-                function skipWhitespace() {
-                    while (token === 5 || token === 4) {
-                        nextJSDocToken();
-                    }
-                }
-                function parseTag() {
-                    ts.Debug.assert(token === 55);
-                    var atToken = createNode(55, scanner.getTokenPos());
-                    atToken.end = scanner.getTextPos();
-                    nextJSDocToken();
-                    var tagName = parseJSDocIdentifierName();
-                    if (!tagName) {
-                        return;
-                    }
-                    var tag = handleTag(atToken, tagName) || handleUnknownTag(atToken, tagName);
-                    addTag(tag);
-                }
-                function handleTag(atToken, tagName) {
-                    if (tagName) {
-                        switch (tagName.text) {
-                            case "param":
-                                return handleParamTag(atToken, tagName);
-                            case "return":
-                            case "returns":
-                                return handleReturnTag(atToken, tagName);
-                            case "template":
-                                return handleTemplateTag(atToken, tagName);
-                            case "type":
-                                return handleTypeTag(atToken, tagName);
-                        }
-                    }
-                    return undefined;
-                }
-                function handleUnknownTag(atToken, tagName) {
-                    var result = createNode(274, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    return finishNode(result);
-                }
-                function addTag(tag) {
-                    if (tag) {
-                        if (!tags) {
-                            tags = [];
-                            tags.pos = tag.pos;
-                        }
-                        tags.push(tag);
-                        tags.end = tag.end;
-                    }
-                }
-                function tryParseTypeExpression() {
-                    if (token !== 15) {
-                        return undefined;
-                    }
-                    var typeExpression = parseJSDocTypeExpression();
-                    return typeExpression;
-                }
-                function handleParamTag(atToken, tagName) {
-                    var typeExpression = tryParseTypeExpression();
-                    skipWhitespace();
-                    var name;
-                    var isBracketed;
-                    if (parseOptionalToken(19)) {
-                        name = parseJSDocIdentifierName();
-                        isBracketed = true;
-                        if (parseOptionalToken(56)) {
-                            parseExpression();
-                        }
-                        parseExpected(20);
-                    }
-                    else if (ts.tokenIsIdentifierOrKeyword(token)) {
-                        name = parseJSDocIdentifierName();
-                    }
-                    if (!name) {
-                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var preName, postName;
-                    if (typeExpression) {
-                        postName = name;
-                    }
-                    else {
-                        preName = name;
-                    }
-                    if (!typeExpression) {
-                        typeExpression = tryParseTypeExpression();
-                    }
-                    var result = createNode(275, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.preParameterName = preName;
-                    result.typeExpression = typeExpression;
-                    result.postParameterName = postName;
-                    result.isBracketed = isBracketed;
-                    return finishNode(result);
-                }
-                function handleReturnTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 276; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(276, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
-                }
-                function handleTypeTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 277; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(277, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
-                }
-                function handleTemplateTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 278; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var typeParameters = [];
-                    typeParameters.pos = scanner.getStartPos();
-                    while (true) {
-                        var name_8 = parseJSDocIdentifierName();
-                        if (!name_8) {
-                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                            return undefined;
-                        }
-                        var typeParameter = createNode(141, name_8.pos);
-                        typeParameter.name = name_8;
-                        finishNode(typeParameter);
-                        typeParameters.push(typeParameter);
-                        if (token === 24) {
-                            nextJSDocToken();
-                        }
-                        else {
-                            break;
-                        }
-                    }
-                    var result = createNode(278, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeParameters = typeParameters;
-                    finishNode(result);
-                    typeParameters.end = result.end;
-                    return result;
-                }
-                function nextJSDocToken() {
-                    return token = scanner.scanJSDocToken();
-                }
-                function parseJSDocIdentifierName() {
-                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token));
-                }
-                function createJSDocIdentifier(isIdentifier) {
-                    if (!isIdentifier) {
-                        parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var pos = scanner.getTokenPos();
-                    var end = scanner.getTextPos();
-                    var result = createNode(69, pos);
-                    result.text = content.substring(pos, end);
-                    finishNode(result, end);
-                    nextJSDocToken();
-                    return result;
-                }
-            }
-            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
-        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
-    })(Parser || (Parser = {}));
-    var IncrementalParser;
-    (function (IncrementalParser) {
-        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2);
-            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
-            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
-                return sourceFile;
-            }
-            if (sourceFile.statements.length === 0) {
-                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, undefined, true, sourceFile.scriptKind);
-            }
-            var incrementalSourceFile = sourceFile;
-            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
-            incrementalSourceFile.hasBeenIncrementallyParsed = true;
-            var oldText = sourceFile.text;
-            var syntaxCursor = createSyntaxCursor(sourceFile);
-            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
-            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
-            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
-            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
-            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
-            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
-            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
-            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, true, sourceFile.scriptKind);
-            return result;
-        }
-        IncrementalParser.updateSourceFile = updateSourceFile;
-        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
-            if (isArray) {
-                visitArray(element);
-            }
-            else {
-                visitNode(element);
-            }
-            return;
-            function visitNode(node) {
-                var text = "";
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    text = oldText.substring(node.pos, node.end);
-                }
-                if (node._children) {
-                    node._children = undefined;
-                }
-                if (node.jsDocComment) {
-                    node.jsDocComment = undefined;
-                }
-                node.pos += delta;
-                node.end += delta;
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
-                }
-                forEachChild(node, visitNode, visitArray);
-                checkNodePositions(node, aggressiveChecks);
-            }
-            function visitArray(array) {
-                array._children = undefined;
-                array.pos += delta;
-                array.end += delta;
-                for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
-                    var node = array_7[_i];
-                    visitNode(node);
-                }
-            }
-        }
-        function shouldCheckNode(node) {
-            switch (node.kind) {
-                case 9:
-                case 8:
-                case 69:
-                    return true;
-            }
-            return false;
-        }
-        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
-            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
-            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
-            ts.Debug.assert(element.pos <= element.end);
-            element.pos = Math.min(element.pos, changeRangeNewEnd);
-            if (element.end >= changeRangeOldEnd) {
-                element.end += delta;
-            }
-            else {
-                element.end = Math.min(element.end, changeRangeNewEnd);
-            }
-            ts.Debug.assert(element.pos <= element.end);
-            if (element.parent) {
-                ts.Debug.assert(element.pos >= element.parent.pos);
-                ts.Debug.assert(element.end <= element.parent.end);
-            }
-        }
-        function checkNodePositions(node, aggressiveChecks) {
-            if (aggressiveChecks) {
-                var pos_2 = node.pos;
-                forEachChild(node, function (child) {
-                    ts.Debug.assert(child.pos >= pos_2);
-                    pos_2 = child.end;
-                });
-                ts.Debug.assert(pos_2 <= node.end);
-            }
-        }
-        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
-            visitNode(sourceFile);
-            return;
-            function visitNode(child) {
-                ts.Debug.assert(child.pos <= child.end);
-                if (child.pos > changeRangeOldEnd) {
-                    moveElementEntirelyPastChangeRange(child, false, delta, oldText, newText, aggressiveChecks);
-                    return;
-                }
-                var fullEnd = child.end;
-                if (fullEnd >= changeStart) {
-                    child.intersectsChange = true;
-                    child._children = undefined;
-                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    forEachChild(child, visitNode, visitArray);
-                    checkNodePositions(child, aggressiveChecks);
-                    return;
-                }
-                ts.Debug.assert(fullEnd < changeStart);
-            }
-            function visitArray(array) {
-                ts.Debug.assert(array.pos <= array.end);
-                if (array.pos > changeRangeOldEnd) {
-                    moveElementEntirelyPastChangeRange(array, true, delta, oldText, newText, aggressiveChecks);
-                    return;
-                }
-                var fullEnd = array.end;
-                if (fullEnd >= changeStart) {
-                    array.intersectsChange = true;
-                    array._children = undefined;
-                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
-                        var node = array_8[_i];
-                        visitNode(node);
-                    }
-                    return;
-                }
-                ts.Debug.assert(fullEnd < changeStart);
-            }
-        }
-        function extendToAffectedRange(sourceFile, changeRange) {
-            var maxLookahead = 1;
-            var start = changeRange.span.start;
-            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
-                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
-                ts.Debug.assert(nearestNode.pos <= start);
-                var position = nearestNode.pos;
-                start = Math.max(0, position - 1);
-            }
-            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
-            var finalLength = changeRange.newLength + (changeRange.span.start - start);
-            return ts.createTextChangeRange(finalSpan, finalLength);
-        }
-        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
-            var bestResult = sourceFile;
-            var lastNodeEntirelyBeforePosition;
-            forEachChild(sourceFile, visit);
-            if (lastNodeEntirelyBeforePosition) {
-                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
-                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
-                    bestResult = lastChildOfLastEntireNodeBeforePosition;
-                }
-            }
-            return bestResult;
-            function getLastChild(node) {
-                while (true) {
-                    var lastChild = getLastChildWorker(node);
-                    if (lastChild) {
-                        node = lastChild;
-                    }
-                    else {
-                        return node;
-                    }
-                }
-            }
-            function getLastChildWorker(node) {
-                var last = undefined;
-                forEachChild(node, function (child) {
-                    if (ts.nodeIsPresent(child)) {
-                        last = child;
-                    }
-                });
-                return last;
-            }
-            function visit(child) {
-                if (ts.nodeIsMissing(child)) {
-                    return;
-                }
-                if (child.pos <= position) {
-                    if (child.pos >= bestResult.pos) {
-                        bestResult = child;
-                    }
-                    if (position < child.end) {
-                        forEachChild(child, visit);
-                        return true;
-                    }
-                    else {
-                        ts.Debug.assert(child.end <= position);
-                        lastNodeEntirelyBeforePosition = child;
-                    }
-                }
-                else {
-                    ts.Debug.assert(child.pos > position);
-                    return true;
-                }
-            }
-        }
-        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            var oldText = sourceFile.text;
-            if (textChangeRange) {
-                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
-                if (aggressiveChecks || ts.Debug.shouldAssert(3)) {
-                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
-                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
-                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
-                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
-                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
-                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
-                }
-            }
-        }
-        function createSyntaxCursor(sourceFile) {
-            var currentArray = sourceFile.statements;
-            var currentArrayIndex = 0;
-            ts.Debug.assert(currentArrayIndex < currentArray.length);
-            var current = currentArray[currentArrayIndex];
-            var lastQueriedPosition = -1;
-            return {
-                currentNode: function (position) {
-                    if (position !== lastQueriedPosition) {
-                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
-                            currentArrayIndex++;
-                            current = currentArray[currentArrayIndex];
-                        }
-                        if (!current || current.pos !== position) {
-                            findHighestListElementThatStartsAtPosition(position);
-                        }
-                    }
-                    lastQueriedPosition = position;
-                    ts.Debug.assert(!current || current.pos === position);
-                    return current;
-                }
-            };
-            function findHighestListElementThatStartsAtPosition(position) {
-                currentArray = undefined;
-                currentArrayIndex = -1;
-                current = undefined;
-                forEachChild(sourceFile, visitNode, visitArray);
-                return;
-                function visitNode(node) {
-                    if (position >= node.pos && position < node.end) {
-                        forEachChild(node, visitNode, visitArray);
-                        return true;
-                    }
-                    return false;
-                }
-                function visitArray(array) {
-                    if (position >= array.pos && position < array.end) {
-                        for (var i = 0, n = array.length; i < n; i++) {
-                            var child = array[i];
-                            if (child) {
-                                if (child.pos === position) {
-                                    currentArray = array;
-                                    currentArrayIndex = i;
-                                    current = child;
-                                    return true;
-                                }
-                                else {
-                                    if (child.pos < position && position < child.end) {
-                                        forEachChild(child, visitNode, visitArray);
-                                        return true;
-                                    }
-                                }
-                            }
-                        }
-                    }
-                    return false;
-                }
-            }
-        }
-    })(IncrementalParser || (IncrementalParser = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.bindTime = 0;
-    function getModuleInstanceState(node) {
-        if (node.kind === 222 || node.kind === 223) {
-            return 0;
-        }
-        else if (ts.isConstEnumDeclaration(node)) {
-            return 2;
-        }
-        else if ((node.kind === 230 || node.kind === 229) && !(node.flags & 1)) {
-            return 0;
-        }
-        else if (node.kind === 226) {
-            var state_1 = 0;
-            ts.forEachChild(node, function (n) {
-                switch (getModuleInstanceState(n)) {
-                    case 0:
-                        return false;
-                    case 2:
-                        state_1 = 2;
-                        return false;
-                    case 1:
-                        state_1 = 1;
-                        return true;
-                }
-            });
-            return state_1;
-        }
-        else if (node.kind === 225) {
-            return getModuleInstanceState(node.body);
-        }
-        else {
-            return 1;
-        }
-    }
-    ts.getModuleInstanceState = getModuleInstanceState;
-    var binder = createBinder();
-    function bindSourceFile(file, options) {
-        var start = new Date().getTime();
-        binder(file, options);
-        ts.bindTime += new Date().getTime() - start;
-    }
-    ts.bindSourceFile = bindSourceFile;
-    function createBinder() {
-        var file;
-        var options;
-        var languageVersion;
-        var parent;
-        var container;
-        var blockScopeContainer;
-        var lastContainer;
-        var seenThisKeyword;
-        var hasExplicitReturn;
-        var currentFlow;
-        var currentBreakTarget;
-        var currentContinueTarget;
-        var currentTrueTarget;
-        var currentFalseTarget;
-        var preSwitchCaseFlow;
-        var activeLabels;
-        var hasClassExtends;
-        var hasAsyncFunctions;
-        var hasDecorators;
-        var hasParameterDecorators;
-        var hasJsxSpreadAttribute;
-        var inStrictMode;
-        var symbolCount = 0;
-        var Symbol;
-        var classifiableNames;
-        var unreachableFlow = { flags: 1 };
-        var reportedUnreachableFlow = { flags: 1 };
-        function bindSourceFile(f, opts) {
-            file = f;
-            options = opts;
-            languageVersion = ts.getEmitScriptTarget(options);
-            inStrictMode = !!file.externalModuleIndicator;
-            classifiableNames = {};
-            symbolCount = 0;
-            Symbol = ts.objectAllocator.getSymbolConstructor();
-            if (!file.locals) {
-                bind(file);
-                file.symbolCount = symbolCount;
-                file.classifiableNames = classifiableNames;
-            }
-            file = undefined;
-            options = undefined;
-            languageVersion = undefined;
-            parent = undefined;
-            container = undefined;
-            blockScopeContainer = undefined;
-            lastContainer = undefined;
-            seenThisKeyword = false;
-            hasExplicitReturn = false;
-            currentFlow = undefined;
-            currentBreakTarget = undefined;
-            currentContinueTarget = undefined;
-            currentTrueTarget = undefined;
-            currentFalseTarget = undefined;
-            activeLabels = undefined;
-            hasClassExtends = false;
-            hasAsyncFunctions = false;
-            hasDecorators = false;
-            hasParameterDecorators = false;
-            hasJsxSpreadAttribute = false;
-        }
-        return bindSourceFile;
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
-        }
-        function addDeclarationToSymbol(symbol, node, symbolFlags) {
-            symbol.flags |= symbolFlags;
-            node.symbol = symbol;
-            if (!symbol.declarations) {
-                symbol.declarations = [];
-            }
-            symbol.declarations.push(node);
-            if (symbolFlags & 1952 && !symbol.exports) {
-                symbol.exports = {};
-            }
-            if (symbolFlags & 6240 && !symbol.members) {
-                symbol.members = {};
-            }
-            if (symbolFlags & 107455) {
-                var valueDeclaration = symbol.valueDeclaration;
-                if (!valueDeclaration ||
-                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 225)) {
-                    symbol.valueDeclaration = node;
-                }
-            }
-        }
-        function getDeclarationName(node) {
-            if (node.name) {
-                if (ts.isAmbientModule(node)) {
-                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
-                }
-                if (node.name.kind === 140) {
-                    var nameExpression = node.name.expression;
-                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
-                        return nameExpression.text;
-                    }
-                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
-                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
-                }
-                return node.name.text;
-            }
-            switch (node.kind) {
-                case 148:
-                    return "__constructor";
-                case 156:
-                case 151:
-                    return "__call";
-                case 157:
-                case 152:
-                    return "__new";
-                case 153:
-                    return "__index";
-                case 236:
-                    return "__export";
-                case 235:
-                    return node.isExportEquals ? "export=" : "default";
-                case 187:
-                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
-                        case 2:
-                            return "export=";
-                        case 1:
-                        case 4:
-                            return node.left.name.text;
-                        case 3:
-                            return node.left.expression.name.text;
-                    }
-                    ts.Debug.fail("Unknown binary declaration kind");
-                    break;
-                case 220:
-                case 221:
-                    return node.flags & 512 ? "default" : undefined;
-                case 269:
-                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
-                case 142:
-                    ts.Debug.assert(node.parent.kind === 269);
-                    var functionType = node.parent;
-                    var index = ts.indexOf(functionType.parameters, node);
-                    return "p" + index;
-            }
-        }
-        function getDisplayName(node) {
-            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
-        }
-        function declareSymbol(symbolTable, parent, node, includes, excludes) {
-            ts.Debug.assert(!ts.hasDynamicName(node));
-            var isDefaultExport = node.flags & 512;
-            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
-            var symbol;
-            if (name !== undefined) {
-                symbol = ts.hasProperty(symbolTable, name)
-                    ? symbolTable[name]
-                    : (symbolTable[name] = createSymbol(0, name));
-                if (name && (includes & 788448)) {
-                    classifiableNames[name] = name;
-                }
-                if (symbol.flags & excludes) {
-                    if (node.name) {
-                        node.name.parent = node;
-                    }
-                    var message_1 = symbol.flags & 2
-                        ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
-                        : ts.Diagnostics.Duplicate_identifier_0;
-                    ts.forEach(symbol.declarations, function (declaration) {
-                        if (declaration.flags & 512) {
-                            message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
-                        }
-                    });
-                    ts.forEach(symbol.declarations, function (declaration) {
-                        file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
-                    });
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
-                    symbol = createSymbol(0, name);
-                }
-            }
-            else {
-                symbol = createSymbol(0, "__missing");
-            }
-            addDeclarationToSymbol(symbol, node, includes);
-            symbol.parent = parent;
-            return symbol;
-        }
-        function declareModuleMember(node, symbolFlags, symbolExcludes) {
-            var hasExportModifier = ts.getCombinedNodeFlags(node) & 1;
-            if (symbolFlags & 8388608) {
-                if (node.kind === 238 || (node.kind === 229 && hasExportModifier)) {
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-                }
-            }
-            else {
-                if (!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 8192)) {
-                    var exportKind = (symbolFlags & 107455 ? 1048576 : 0) |
-                        (symbolFlags & 793056 ? 2097152 : 0) |
-                        (symbolFlags & 1536 ? 4194304 : 0);
-                    var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
-                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                    node.localSymbol = local;
-                    return local;
-                }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-                }
-            }
-        }
-        function bindChildren(node) {
-            var saveParent = parent;
-            var saveContainer = container;
-            var savedBlockScopeContainer = blockScopeContainer;
-            parent = node;
-            var containerFlags = getContainerFlags(node);
-            if (containerFlags & 1) {
-                container = blockScopeContainer = node;
-                if (containerFlags & 4) {
-                    container.locals = {};
-                }
-                addToContainerChain(container);
-            }
-            else if (containerFlags & 2) {
-                blockScopeContainer = node;
-                blockScopeContainer.locals = undefined;
-            }
-            var savedHasExplicitReturn;
-            var savedCurrentFlow;
-            var savedBreakTarget;
-            var savedContinueTarget;
-            var savedActiveLabels;
-            var kind = node.kind;
-            var flags = node.flags;
-            flags &= ~98304;
-            flags &= ~3932160;
-            if (kind === 222) {
-                seenThisKeyword = false;
-            }
-            var saveState = kind === 256 || kind === 226 || ts.isFunctionLikeKind(kind);
-            if (saveState) {
-                savedHasExplicitReturn = hasExplicitReturn;
-                savedCurrentFlow = currentFlow;
-                savedBreakTarget = currentBreakTarget;
-                savedContinueTarget = currentContinueTarget;
-                savedActiveLabels = activeLabels;
-                hasExplicitReturn = false;
-                currentFlow = { flags: 2 };
-                currentBreakTarget = undefined;
-                currentContinueTarget = undefined;
-                activeLabels = undefined;
-            }
-            if (ts.isInJavaScriptFile(node) && node.jsDocComment) {
-                bind(node.jsDocComment);
-            }
-            bindReachableStatement(node);
-            if (!(currentFlow.flags & 1) && ts.isFunctionLikeKind(kind) && ts.nodeIsPresent(node.body)) {
-                flags |= 32768;
-                if (hasExplicitReturn) {
-                    flags |= 65536;
-                }
-            }
-            if (kind === 222) {
-                flags = seenThisKeyword ? flags | 16384 : flags & ~16384;
-            }
-            if (kind === 256) {
-                if (hasClassExtends) {
-                    flags |= 262144;
-                }
-                if (hasDecorators) {
-                    flags |= 524288;
-                }
-                if (hasParameterDecorators) {
-                    flags |= 1048576;
-                }
-                if (hasAsyncFunctions) {
-                    flags |= 2097152;
-                }
-                if (hasJsxSpreadAttribute) {
-                    flags |= 1073741824;
-                }
-            }
-            node.flags = flags;
-            if (saveState) {
-                hasExplicitReturn = savedHasExplicitReturn;
-                currentFlow = savedCurrentFlow;
-                currentBreakTarget = savedBreakTarget;
-                currentContinueTarget = savedContinueTarget;
-                activeLabels = savedActiveLabels;
-            }
-            container = saveContainer;
-            parent = saveParent;
-            blockScopeContainer = savedBlockScopeContainer;
-        }
-        function bindReachableStatement(node) {
-            if (checkUnreachable(node)) {
-                ts.forEachChild(node, bind);
-                return;
-            }
-            switch (node.kind) {
-                case 205:
-                    bindWhileStatement(node);
-                    break;
-                case 204:
-                    bindDoStatement(node);
-                    break;
-                case 206:
-                    bindForStatement(node);
-                    break;
-                case 207:
-                case 208:
-                    bindForInOrForOfStatement(node);
-                    break;
-                case 203:
-                    bindIfStatement(node);
-                    break;
-                case 211:
-                case 215:
-                    bindReturnOrThrow(node);
-                    break;
-                case 210:
-                case 209:
-                    bindBreakOrContinueStatement(node);
-                    break;
-                case 216:
-                    bindTryStatement(node);
-                    break;
-                case 213:
-                    bindSwitchStatement(node);
-                    break;
-                case 227:
-                    bindCaseBlock(node);
-                    break;
-                case 214:
-                    bindLabeledStatement(node);
-                    break;
-                case 185:
-                    bindPrefixUnaryExpressionFlow(node);
-                    break;
-                case 187:
-                    bindBinaryExpressionFlow(node);
-                    break;
-                case 181:
-                    bindDeleteExpressionFlow(node);
-                    break;
-                case 188:
-                    bindConditionalExpressionFlow(node);
-                    break;
-                case 218:
-                    bindVariableDeclarationFlow(node);
-                    break;
-                default:
-                    ts.forEachChild(node, bind);
-                    break;
-            }
-        }
-        function isNarrowableReference(expr) {
-            return expr.kind === 69 ||
-                expr.kind === 97 ||
-                expr.kind === 172 && isNarrowableReference(expr.expression);
-        }
-        function isNarrowingExpression(expr) {
-            switch (expr.kind) {
-                case 69:
-                case 97:
-                case 172:
-                    return isNarrowableReference(expr);
-                case 174:
-                    return true;
-                case 178:
-                    return isNarrowingExpression(expr.expression);
-                case 187:
-                    return isNarrowingBinaryExpression(expr);
-                case 185:
-                    return expr.operator === 49 && isNarrowingExpression(expr.operand);
-            }
-            return false;
-        }
-        function isNarrowingBinaryExpression(expr) {
-            switch (expr.operatorToken.kind) {
-                case 56:
-                    return isNarrowableReference(expr.left);
-                case 30:
-                case 31:
-                case 32:
-                case 33:
-                    if (isNarrowingExpression(expr.left) && (expr.right.kind === 93 || expr.right.kind === 69)) {
-                        return true;
-                    }
-                    if (expr.left.kind === 182 && isNarrowingExpression(expr.left.expression) && expr.right.kind === 9) {
-                        return true;
-                    }
-                    return false;
-                case 91:
-                    return isNarrowingExpression(expr.left);
-                case 24:
-                    return isNarrowingExpression(expr.right);
-            }
-            return false;
-        }
-        function createBranchLabel() {
-            return {
-                flags: 4,
-                antecedents: undefined
-            };
-        }
-        function createLoopLabel() {
-            return {
-                flags: 8,
-                antecedents: undefined
-            };
-        }
-        function setFlowNodeReferenced(flow) {
-            flow.flags |= flow.flags & 128 ? 256 : 128;
-        }
-        function addAntecedent(label, antecedent) {
-            if (!(antecedent.flags & 1) && !ts.contains(label.antecedents, antecedent)) {
-                (label.antecedents || (label.antecedents = [])).push(antecedent);
-                setFlowNodeReferenced(antecedent);
-            }
-        }
-        function createFlowCondition(flags, antecedent, expression) {
-            if (antecedent.flags & 1) {
-                return antecedent;
-            }
-            if (!expression) {
-                return flags & 32 ? antecedent : unreachableFlow;
-            }
-            if (expression.kind === 99 && flags & 64 ||
-                expression.kind === 84 && flags & 32) {
-                return unreachableFlow;
-            }
-            if (!isNarrowingExpression(expression)) {
-                return antecedent;
-            }
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: flags,
-                antecedent: antecedent,
-                expression: expression
-            };
-        }
-        function createFlowAssignment(antecedent, node) {
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: 16,
-                antecedent: antecedent,
-                node: node
-            };
-        }
-        function finishFlowLabel(flow) {
-            var antecedents = flow.antecedents;
-            if (!antecedents) {
-                return unreachableFlow;
-            }
-            if (antecedents.length === 1) {
-                return antecedents[0];
-            }
-            return flow;
-        }
-        function isStatementCondition(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 203:
-                case 205:
-                case 204:
-                    return parent.expression === node;
-                case 206:
-                case 188:
-                    return parent.condition === node;
-            }
-            return false;
-        }
-        function isLogicalExpression(node) {
-            while (true) {
-                if (node.kind === 178) {
-                    node = node.expression;
-                }
-                else if (node.kind === 185 && node.operator === 49) {
-                    node = node.operand;
-                }
-                else {
-                    return node.kind === 187 && (node.operatorToken.kind === 51 ||
-                        node.operatorToken.kind === 52);
-                }
-            }
-        }
-        function isTopLevelLogicalExpression(node) {
-            while (node.parent.kind === 178 ||
-                node.parent.kind === 185 &&
-                    node.parent.operator === 49) {
-                node = node.parent;
-            }
-            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
-        }
-        function bindCondition(node, trueTarget, falseTarget) {
-            var saveTrueTarget = currentTrueTarget;
-            var saveFalseTarget = currentFalseTarget;
-            currentTrueTarget = trueTarget;
-            currentFalseTarget = falseTarget;
-            bind(node);
-            currentTrueTarget = saveTrueTarget;
-            currentFalseTarget = saveFalseTarget;
-            if (!node || !isLogicalExpression(node)) {
-                addAntecedent(trueTarget, createFlowCondition(32, currentFlow, node));
-                addAntecedent(falseTarget, createFlowCondition(64, currentFlow, node));
-            }
-        }
-        function bindIterativeStatement(node, breakTarget, continueTarget) {
-            var saveBreakTarget = currentBreakTarget;
-            var saveContinueTarget = currentContinueTarget;
-            currentBreakTarget = breakTarget;
-            currentContinueTarget = continueTarget;
-            bind(node);
-            currentBreakTarget = saveBreakTarget;
-            currentContinueTarget = saveContinueTarget;
-        }
-        function bindWhileStatement(node) {
-            var preWhileLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postWhileLabel = createBranchLabel();
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = preWhileLabel;
-            bindCondition(node.expression, preBodyLabel, postWhileLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = finishFlowLabel(postWhileLabel);
-        }
-        function bindDoStatement(node) {
-            var preDoLabel = createLoopLabel();
-            var preConditionLabel = createBranchLabel();
-            var postDoLabel = createBranchLabel();
-            addAntecedent(preDoLabel, currentFlow);
-            currentFlow = preDoLabel;
-            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
-            addAntecedent(preConditionLabel, currentFlow);
-            currentFlow = finishFlowLabel(preConditionLabel);
-            bindCondition(node.expression, preDoLabel, postDoLabel);
-            currentFlow = finishFlowLabel(postDoLabel);
-        }
-        function bindForStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postLoopLabel = createBranchLabel();
-            bind(node.initializer);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bindCondition(node.condition, preBodyLabel, postLoopLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            bind(node.incrementor);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindForInOrForOfStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var postLoopLabel = createBranchLabel();
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bind(node.expression);
-            addAntecedent(postLoopLabel, currentFlow);
-            bind(node.initializer);
-            if (node.initializer.kind !== 219) {
-                bindAssignmentTargetFlow(node.initializer);
-            }
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindIfStatement(node) {
-            var thenLabel = createBranchLabel();
-            var elseLabel = createBranchLabel();
-            var postIfLabel = createBranchLabel();
-            bindCondition(node.expression, thenLabel, elseLabel);
-            currentFlow = finishFlowLabel(thenLabel);
-            bind(node.thenStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(elseLabel);
-            bind(node.elseStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(postIfLabel);
-        }
-        function bindReturnOrThrow(node) {
-            bind(node.expression);
-            if (node.kind === 211) {
-                hasExplicitReturn = true;
-            }
-            currentFlow = unreachableFlow;
-        }
-        function findActiveLabel(name) {
-            if (activeLabels) {
-                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
-                    var label = activeLabels_1[_i];
-                    if (label.name === name) {
-                        return label;
-                    }
-                }
-            }
-            return undefined;
-        }
-        function bindbreakOrContinueFlow(node, breakTarget, continueTarget) {
-            var flowLabel = node.kind === 210 ? breakTarget : continueTarget;
-            if (flowLabel) {
-                addAntecedent(flowLabel, currentFlow);
-                currentFlow = unreachableFlow;
-            }
-        }
-        function bindBreakOrContinueStatement(node) {
-            bind(node.label);
-            if (node.label) {
-                var activeLabel = findActiveLabel(node.label.text);
-                if (activeLabel) {
-                    activeLabel.referenced = true;
-                    bindbreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
-                }
-            }
-            else {
-                bindbreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
-            }
-        }
-        function bindTryStatement(node) {
-            var postFinallyLabel = createBranchLabel();
-            var preTryFlow = currentFlow;
-            bind(node.tryBlock);
-            addAntecedent(postFinallyLabel, currentFlow);
-            if (node.catchClause) {
-                currentFlow = preTryFlow;
-                bind(node.catchClause);
-                addAntecedent(postFinallyLabel, currentFlow);
-            }
-            if (node.finallyBlock) {
-                currentFlow = preTryFlow;
-                bind(node.finallyBlock);
-            }
-            currentFlow = finishFlowLabel(postFinallyLabel);
-        }
-        function bindSwitchStatement(node) {
-            var postSwitchLabel = createBranchLabel();
-            bind(node.expression);
-            var saveBreakTarget = currentBreakTarget;
-            var savePreSwitchCaseFlow = preSwitchCaseFlow;
-            currentBreakTarget = postSwitchLabel;
-            preSwitchCaseFlow = currentFlow;
-            bind(node.caseBlock);
-            addAntecedent(postSwitchLabel, currentFlow);
-            var hasDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 250; });
-            if (!hasDefault) {
-                addAntecedent(postSwitchLabel, preSwitchCaseFlow);
-            }
-            currentBreakTarget = saveBreakTarget;
-            preSwitchCaseFlow = savePreSwitchCaseFlow;
-            currentFlow = finishFlowLabel(postSwitchLabel);
-        }
-        function bindCaseBlock(node) {
-            var clauses = node.clauses;
-            for (var i = 0; i < clauses.length; i++) {
-                var clause = clauses[i];
-                if (clause.statements.length) {
-                    if (currentFlow.flags & 1) {
-                        currentFlow = preSwitchCaseFlow;
-                    }
-                    else {
-                        var preCaseLabel = createBranchLabel();
-                        addAntecedent(preCaseLabel, preSwitchCaseFlow);
-                        addAntecedent(preCaseLabel, currentFlow);
-                        currentFlow = finishFlowLabel(preCaseLabel);
-                    }
-                    bind(clause);
-                    if (!(currentFlow.flags & 1) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
-                        errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
-                    }
-                }
-                else {
-                    bind(clause);
-                }
-            }
-        }
-        function pushActiveLabel(name, breakTarget, continueTarget) {
-            var activeLabel = {
-                name: name,
-                breakTarget: breakTarget,
-                continueTarget: continueTarget,
-                referenced: false
-            };
-            (activeLabels || (activeLabels = [])).push(activeLabel);
-            return activeLabel;
-        }
-        function popActiveLabel() {
-            activeLabels.pop();
-        }
-        function bindLabeledStatement(node) {
-            var preStatementLabel = createLoopLabel();
-            var postStatementLabel = createBranchLabel();
-            bind(node.label);
-            addAntecedent(preStatementLabel, currentFlow);
-            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
-            bind(node.statement);
-            popActiveLabel();
-            if (!activeLabel.referenced && !options.allowUnusedLabels) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
-            }
-            addAntecedent(postStatementLabel, currentFlow);
-            currentFlow = finishFlowLabel(postStatementLabel);
-        }
-        function bindDestructuringTargetFlow(node) {
-            if (node.kind === 187 && node.operatorToken.kind === 56) {
-                bindAssignmentTargetFlow(node.left);
-            }
-            else {
-                bindAssignmentTargetFlow(node);
-            }
-        }
-        function bindAssignmentTargetFlow(node) {
-            if (isNarrowableReference(node)) {
-                currentFlow = createFlowAssignment(currentFlow, node);
-            }
-            else if (node.kind === 170) {
-                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
-                    var e = _a[_i];
-                    if (e.kind === 191) {
-                        bindAssignmentTargetFlow(e.expression);
-                    }
-                    else {
-                        bindDestructuringTargetFlow(e);
-                    }
-                }
-            }
-            else if (node.kind === 171) {
-                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
-                    var p = _c[_b];
-                    if (p.kind === 253) {
-                        bindDestructuringTargetFlow(p.initializer);
-                    }
-                    else if (p.kind === 254) {
-                        bindAssignmentTargetFlow(p.name);
-                    }
-                }
-            }
-        }
-        function bindLogicalExpression(node, trueTarget, falseTarget) {
-            var preRightLabel = createBranchLabel();
-            if (node.operatorToken.kind === 51) {
-                bindCondition(node.left, preRightLabel, falseTarget);
-            }
-            else {
-                bindCondition(node.left, trueTarget, preRightLabel);
-            }
-            currentFlow = finishFlowLabel(preRightLabel);
-            bind(node.operatorToken);
-            bindCondition(node.right, trueTarget, falseTarget);
-        }
-        function bindPrefixUnaryExpressionFlow(node) {
-            if (node.operator === 49) {
-                var saveTrueTarget = currentTrueTarget;
-                currentTrueTarget = currentFalseTarget;
-                currentFalseTarget = saveTrueTarget;
-                ts.forEachChild(node, bind);
-                currentFalseTarget = currentTrueTarget;
-                currentTrueTarget = saveTrueTarget;
-            }
-            else {
-                ts.forEachChild(node, bind);
-            }
-        }
-        function bindBinaryExpressionFlow(node) {
-            var operator = node.operatorToken.kind;
-            if (operator === 51 || operator === 52) {
-                if (isTopLevelLogicalExpression(node)) {
-                    var postExpressionLabel = createBranchLabel();
-                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
-                    currentFlow = finishFlowLabel(postExpressionLabel);
-                }
-                else {
-                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
-                }
-            }
-            else {
-                ts.forEachChild(node, bind);
-                if (operator === 56 && !ts.isAssignmentTarget(node)) {
-                    bindAssignmentTargetFlow(node.left);
-                }
-            }
-        }
-        function bindDeleteExpressionFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.expression.kind === 172) {
-                bindAssignmentTargetFlow(node.expression);
-            }
-        }
-        function bindConditionalExpressionFlow(node) {
-            var trueLabel = createBranchLabel();
-            var falseLabel = createBranchLabel();
-            var postExpressionLabel = createBranchLabel();
-            bindCondition(node.condition, trueLabel, falseLabel);
-            currentFlow = finishFlowLabel(trueLabel);
-            bind(node.whenTrue);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(falseLabel);
-            bind(node.whenFalse);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(postExpressionLabel);
-        }
-        function bindInitializedVariableFlow(node) {
-            var name = node.name;
-            if (ts.isBindingPattern(name)) {
-                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
-                    var child = _a[_i];
-                    bindInitializedVariableFlow(child);
-                }
-            }
-            else {
-                currentFlow = createFlowAssignment(currentFlow, node);
-            }
-        }
-        function bindVariableDeclarationFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.initializer || node.parent.parent.kind === 207 || node.parent.parent.kind === 208) {
-                bindInitializedVariableFlow(node);
-            }
-        }
-        function getContainerFlags(node) {
-            switch (node.kind) {
-                case 192:
-                case 221:
-                case 222:
-                case 224:
-                case 171:
-                case 159:
-                case 265:
-                    return 1;
-                case 151:
-                case 152:
-                case 153:
-                case 147:
-                case 146:
-                case 220:
-                case 148:
-                case 149:
-                case 150:
-                case 156:
-                case 269:
-                case 157:
-                case 179:
-                case 180:
-                case 225:
-                case 256:
-                case 223:
-                    return 5;
-                case 252:
-                case 206:
-                case 207:
-                case 208:
-                case 227:
-                    return 2;
-                case 199:
-                    return ts.isFunctionLike(node.parent) ? 0 : 2;
-            }
-            return 0;
-        }
-        function addToContainerChain(next) {
-            if (lastContainer) {
-                lastContainer.nextContainer = next;
-            }
-            lastContainer = next;
-        }
-        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
-            declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
-        }
-        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
-            switch (container.kind) {
-                case 225:
-                    return declareModuleMember(node, symbolFlags, symbolExcludes);
-                case 256:
-                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
-                case 192:
-                case 221:
-                    return declareClassMember(node, symbolFlags, symbolExcludes);
-                case 224:
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                case 159:
-                case 171:
-                case 222:
-                case 265:
-                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
-                case 156:
-                case 157:
-                case 151:
-                case 152:
-                case 153:
-                case 147:
-                case 146:
-                case 148:
-                case 149:
-                case 150:
-                case 220:
-                case 179:
-                case 180:
-                case 269:
-                case 223:
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-            }
-        }
-        function declareClassMember(node, symbolFlags, symbolExcludes) {
-            return node.flags & 32
-                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
-                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
-        }
-        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
-            return ts.isExternalModule(file)
-                ? declareModuleMember(node, symbolFlags, symbolExcludes)
-                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
-        }
-        function hasExportDeclarations(node) {
-            var body = node.kind === 256 ? node : node.body;
-            if (body.kind === 256 || body.kind === 226) {
-                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
-                    var stat = _a[_i];
-                    if (stat.kind === 236 || stat.kind === 235) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function setExportContextFlag(node) {
-            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
-                node.flags |= 8192;
-            }
-            else {
-                node.flags &= ~8192;
-            }
-        }
-        function bindModuleDeclaration(node) {
-            setExportContextFlag(node);
-            if (ts.isAmbientModule(node)) {
-                if (node.flags & 1) {
-                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
-                }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    declareSymbolAndAddToSymbolTable(node, 1024, 0);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 512, 106639);
-                }
-            }
-            else {
-                var state = getModuleInstanceState(node);
-                if (state === 0) {
-                    declareSymbolAndAddToSymbolTable(node, 1024, 0);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 512, 106639);
-                    if (node.symbol.flags & (16 | 32 | 256)) {
-                        node.symbol.constEnumOnlyModule = false;
-                    }
-                    else {
-                        var currentModuleIsConstEnumOnly = state === 2;
-                        if (node.symbol.constEnumOnlyModule === undefined) {
-                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
-                        }
-                        else {
-                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
-                        }
-                    }
-                }
-            }
-        }
-        function bindFunctionOrConstructorType(node) {
-            var symbol = createSymbol(131072, getDeclarationName(node));
-            addDeclarationToSymbol(symbol, node, 131072);
-            var typeLiteralSymbol = createSymbol(2048, "__type");
-            addDeclarationToSymbol(typeLiteralSymbol, node, 2048);
-            typeLiteralSymbol.members = (_a = {}, _a[symbol.name] = symbol, _a);
-            var _a;
-        }
-        function bindObjectLiteralExpression(node) {
-            if (inStrictMode) {
-                var seen = {};
-                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (prop.name.kind !== 69) {
-                        continue;
-                    }
-                    var identifier = prop.name;
-                    var currentKind = prop.kind === 253 || prop.kind === 254 || prop.kind === 147
-                        ? 1
-                        : 2;
-                    var existingKind = seen[identifier.text];
-                    if (!existingKind) {
-                        seen[identifier.text] = currentKind;
-                        continue;
-                    }
-                    if (currentKind === 1 && existingKind === 1) {
-                        var span = ts.getErrorSpanForNode(file, identifier);
-                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
-                    }
-                }
-            }
-            return bindAnonymousDeclaration(node, 4096, "__object");
-        }
-        function bindAnonymousDeclaration(node, symbolFlags, name) {
-            var symbol = createSymbol(symbolFlags, name);
-            addDeclarationToSymbol(symbol, node, symbolFlags);
-        }
-        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
-            switch (blockScopeContainer.kind) {
-                case 225:
-                    declareModuleMember(node, symbolFlags, symbolExcludes);
-                    break;
-                case 256:
-                    if (ts.isExternalModule(container)) {
-                        declareModuleMember(node, symbolFlags, symbolExcludes);
-                        break;
-                    }
-                default:
-                    if (!blockScopeContainer.locals) {
-                        blockScopeContainer.locals = {};
-                        addToContainerChain(blockScopeContainer);
-                    }
-                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
-            }
-        }
-        function bindBlockScopedVariableDeclaration(node) {
-            bindBlockScopedDeclaration(node, 2, 107455);
-        }
-        function checkStrictModeIdentifier(node) {
-            if (inStrictMode &&
-                node.originalKeywordKind >= 106 &&
-                node.originalKeywordKind <= 114 &&
-                !ts.isIdentifierName(node) &&
-                !ts.isInAmbientContext(node)) {
-                if (!file.parseDiagnostics.length) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
-                }
-            }
-        }
-        function getStrictModeIdentifierMessage(node) {
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
-        }
-        function checkStrictModeBinaryExpression(node) {
-            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
-                checkStrictModeEvalOrArguments(node, node.left);
-            }
-        }
-        function checkStrictModeCatchClause(node) {
-            if (inStrictMode && node.variableDeclaration) {
-                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
-            }
-        }
-        function checkStrictModeDeleteExpression(node) {
-            if (inStrictMode && node.expression.kind === 69) {
-                var span = ts.getErrorSpanForNode(file, node.expression);
-                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
-            }
-        }
-        function isEvalOrArgumentsIdentifier(node) {
-            return node.kind === 69 &&
-                (node.text === "eval" || node.text === "arguments");
-        }
-        function checkStrictModeEvalOrArguments(contextNode, name) {
-            if (name && name.kind === 69) {
-                var identifier = name;
-                if (isEvalOrArgumentsIdentifier(identifier)) {
-                    var span = ts.getErrorSpanForNode(file, name);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
-                }
-            }
-        }
-        function getStrictModeEvalOrArgumentsMessage(node) {
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
-        }
-        function checkStrictModeFunctionName(node) {
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-        }
-        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
-        }
-        function checkStrictModeFunctionDeclaration(node) {
-            if (languageVersion < 2) {
-                if (blockScopeContainer.kind !== 256 &&
-                    blockScopeContainer.kind !== 225 &&
-                    !ts.isFunctionLike(blockScopeContainer)) {
-                    var errorSpan = ts.getErrorSpanForNode(file, node);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
-                }
-            }
-        }
-        function checkStrictModeNumericLiteral(node) {
-            if (inStrictMode && node.isOctalLiteral) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
-            }
-        }
-        function checkStrictModePostfixUnaryExpression(node) {
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.operand);
-            }
-        }
-        function checkStrictModePrefixUnaryExpression(node) {
-            if (inStrictMode) {
-                if (node.operator === 41 || node.operator === 42) {
-                    checkStrictModeEvalOrArguments(node, node.operand);
-                }
-            }
-        }
-        function checkStrictModeWithStatement(node) {
-            if (inStrictMode) {
-                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
-            }
-        }
-        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
-            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
-        }
-        function getDestructuringParameterName(node) {
-            return "__" + ts.indexOf(node.parent.parameters, node);
-        }
-        function bind(node) {
-            if (!node) {
-                return;
-            }
-            node.parent = parent;
-            var savedInStrictMode = inStrictMode;
-            if (!savedInStrictMode) {
-                updateStrictMode(node);
-            }
-            bindWorker(node);
-            bindChildren(node);
-            inStrictMode = savedInStrictMode;
-        }
-        function updateStrictMode(node) {
-            switch (node.kind) {
-                case 256:
-                case 226:
-                    updateStrictModeStatementList(node.statements);
-                    return;
-                case 199:
-                    if (ts.isFunctionLike(node.parent)) {
-                        updateStrictModeStatementList(node.statements);
-                    }
-                    return;
-                case 221:
-                case 192:
-                    inStrictMode = true;
-                    return;
-            }
-        }
-        function updateStrictModeStatementList(statements) {
-            for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
-                var statement = statements_1[_i];
-                if (!ts.isPrologueDirective(statement)) {
-                    return;
-                }
-                if (isUseStrictPrologueDirective(statement)) {
-                    inStrictMode = true;
-                    return;
-                }
-            }
-        }
-        function isUseStrictPrologueDirective(node) {
-            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
-            return nodeText === '"use strict"' || nodeText === "'use strict'";
-        }
-        function bindWorker(node) {
-            switch (node.kind) {
-                case 69:
-                case 97:
-                    if (currentFlow && (ts.isExpression(node) || parent.kind === 254)) {
-                        node.flowNode = currentFlow;
-                    }
-                    return checkStrictModeIdentifier(node);
-                case 172:
-                    if (currentFlow && isNarrowableReference(node)) {
-                        node.flowNode = currentFlow;
-                    }
-                    break;
-                case 187:
-                    if (ts.isInJavaScriptFile(node)) {
-                        var specialKind = ts.getSpecialPropertyAssignmentKind(node);
-                        switch (specialKind) {
-                            case 1:
-                                bindExportsPropertyAssignment(node);
-                                break;
-                            case 2:
-                                bindModuleExportsAssignment(node);
-                                break;
-                            case 3:
-                                bindPrototypePropertyAssignment(node);
-                                break;
-                            case 4:
-                                bindThisPropertyAssignment(node);
-                                break;
-                            case 0:
-                                break;
-                            default:
-                                ts.Debug.fail("Unknown special property assignment kind");
-                        }
-                    }
-                    return checkStrictModeBinaryExpression(node);
-                case 252:
-                    return checkStrictModeCatchClause(node);
-                case 181:
-                    return checkStrictModeDeleteExpression(node);
-                case 8:
-                    return checkStrictModeNumericLiteral(node);
-                case 186:
-                    return checkStrictModePostfixUnaryExpression(node);
-                case 185:
-                    return checkStrictModePrefixUnaryExpression(node);
-                case 212:
-                    return checkStrictModeWithStatement(node);
-                case 165:
-                    seenThisKeyword = true;
-                    return;
-                case 154:
-                    return checkTypePredicate(node);
-                case 141:
-                    return declareSymbolAndAddToSymbolTable(node, 262144, 530912);
-                case 142:
-                    return bindParameter(node);
-                case 218:
-                case 169:
-                    return bindVariableDeclarationOrBindingElement(node);
-                case 145:
-                case 144:
-                case 266:
-                    return bindPropertyOrMethodOrAccessor(node, 4 | (node.questionToken ? 536870912 : 0), 0);
-                case 253:
-                case 254:
-                    return bindPropertyOrMethodOrAccessor(node, 4, 0);
-                case 255:
-                    return bindPropertyOrMethodOrAccessor(node, 8, 107455);
-                case 247:
-                    hasJsxSpreadAttribute = true;
-                    return;
-                case 151:
-                case 152:
-                case 153:
-                    return declareSymbolAndAddToSymbolTable(node, 131072, 0);
-                case 147:
-                case 146:
-                    return bindPropertyOrMethodOrAccessor(node, 8192 | (node.questionToken ? 536870912 : 0), ts.isObjectLiteralMethod(node) ? 0 : 99263);
-                case 220:
-                    return bindFunctionDeclaration(node);
-                case 148:
-                    return declareSymbolAndAddToSymbolTable(node, 16384, 0);
-                case 149:
-                    return bindPropertyOrMethodOrAccessor(node, 32768, 41919);
-                case 150:
-                    return bindPropertyOrMethodOrAccessor(node, 65536, 74687);
-                case 156:
-                case 157:
-                case 269:
-                    return bindFunctionOrConstructorType(node);
-                case 159:
-                case 265:
-                    return bindAnonymousDeclaration(node, 2048, "__type");
-                case 171:
-                    return bindObjectLiteralExpression(node);
-                case 179:
-                case 180:
-                    return bindFunctionExpression(node);
-                case 174:
-                    if (ts.isInJavaScriptFile(node)) {
-                        bindCallExpression(node);
-                    }
-                    break;
-                case 192:
-                case 221:
-                    return bindClassLikeDeclaration(node);
-                case 222:
-                    return bindBlockScopedDeclaration(node, 64, 792960);
-                case 223:
-                    return bindBlockScopedDeclaration(node, 524288, 793056);
-                case 224:
-                    return bindEnumDeclaration(node);
-                case 225:
-                    return bindModuleDeclaration(node);
-                case 229:
-                case 232:
-                case 234:
-                case 238:
-                    return declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
-                case 228:
-                    return bindNamespaceExportDeclaration(node);
-                case 231:
-                    return bindImportClause(node);
-                case 236:
-                    return bindExportDeclaration(node);
-                case 235:
-                    return bindExportAssignment(node);
-                case 256:
-                    return bindSourceFileIfExternalModule();
-            }
-        }
-        function checkTypePredicate(node) {
-            var parameterName = node.parameterName, type = node.type;
-            if (parameterName && parameterName.kind === 69) {
-                checkStrictModeIdentifier(parameterName);
-            }
-            if (parameterName && parameterName.kind === 165) {
-                seenThisKeyword = true;
-            }
-            bind(type);
-        }
-        function bindSourceFileIfExternalModule() {
-            setExportContextFlag(file);
-            if (ts.isExternalModule(file)) {
-                bindSourceFileAsExternalModule();
-            }
-        }
-        function bindSourceFileAsExternalModule() {
-            bindAnonymousDeclaration(file, 512, "\"" + ts.removeFileExtension(file.fileName) + "\"");
-        }
-        function bindExportAssignment(node) {
-            var boundExpression = node.kind === 235 ? node.expression : node.right;
-            if (!container.symbol || !container.symbol.exports) {
-                bindAnonymousDeclaration(node, 8388608, getDeclarationName(node));
-            }
-            else if (boundExpression.kind === 69 && node.kind === 235) {
-                declareSymbol(container.symbol.exports, container.symbol, node, 8388608, 0 | 8388608);
-            }
-            else {
-                declareSymbol(container.symbol.exports, container.symbol, node, 4, 0 | 8388608);
-            }
-        }
-        function bindNamespaceExportDeclaration(node) {
-            if (node.modifiers && node.modifiers.length) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
-            }
-            if (node.parent.kind !== 256) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
-                return;
-            }
-            else {
-                var parent_5 = node.parent;
-                if (!ts.isExternalModule(parent_5)) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
-                    return;
-                }
-                if (!parent_5.isDeclarationFile) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
-                    return;
-                }
-            }
-            file.symbol.globalExports = file.symbol.globalExports || {};
-            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608, 8388608);
-        }
-        function bindExportDeclaration(node) {
-            if (!container.symbol || !container.symbol.exports) {
-                bindAnonymousDeclaration(node, 1073741824, getDeclarationName(node));
-            }
-            else if (!node.exportClause) {
-                declareSymbol(container.symbol.exports, container.symbol, node, 1073741824, 0);
-            }
-        }
-        function bindImportClause(node) {
-            if (node.name) {
-                declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
-            }
-        }
-        function setCommonJsModuleIndicator(node) {
-            if (!file.commonJsModuleIndicator) {
-                file.commonJsModuleIndicator = node;
-                bindSourceFileAsExternalModule();
-            }
-        }
-        function bindExportsPropertyAssignment(node) {
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 | 7340032, 0);
-        }
-        function bindModuleExportsAssignment(node) {
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node, 4 | 7340032 | 512, 0);
-        }
-        function bindThisPropertyAssignment(node) {
-            if (container.kind === 179 || container.kind === 220) {
-                container.symbol.members = container.symbol.members || {};
-                declareSymbol(container.symbol.members, container.symbol, node, 4, 0 & ~4);
-            }
-        }
-        function bindPrototypePropertyAssignment(node) {
-            var leftSideOfAssignment = node.left;
-            var classPrototype = leftSideOfAssignment.expression;
-            var constructorFunction = classPrototype.expression;
-            leftSideOfAssignment.parent = node;
-            constructorFunction.parent = classPrototype;
-            classPrototype.parent = leftSideOfAssignment;
-            var funcSymbol = container.locals[constructorFunction.text];
-            if (!funcSymbol || !(funcSymbol.flags & 16)) {
-                return;
-            }
-            if (!funcSymbol.members) {
-                funcSymbol.members = {};
-            }
-            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4, 0);
-        }
-        function bindCallExpression(node) {
-            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, false)) {
-                setCommonJsModuleIndicator(node);
-            }
-        }
-        function bindClassLikeDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.getClassExtendsHeritageClauseElement(node) !== undefined) {
-                    hasClassExtends = true;
-                }
-                if (ts.nodeIsDecorated(node)) {
-                    hasDecorators = true;
-                }
-            }
-            if (node.kind === 221) {
-                bindBlockScopedDeclaration(node, 32, 899519);
-            }
-            else {
-                var bindingName = node.name ? node.name.text : "__class";
-                bindAnonymousDeclaration(node, 32, bindingName);
-                if (node.name) {
-                    classifiableNames[node.name.text] = node.name.text;
-                }
-            }
-            var symbol = node.symbol;
-            var prototypeSymbol = createSymbol(4 | 134217728, "prototype");
-            if (ts.hasProperty(symbol.exports, prototypeSymbol.name)) {
-                if (node.name) {
-                    node.name.parent = node;
-                }
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
-            }
-            symbol.exports[prototypeSymbol.name] = prototypeSymbol;
-            prototypeSymbol.parent = symbol;
-        }
-        function bindEnumDeclaration(node) {
-            return ts.isConst(node)
-                ? bindBlockScopedDeclaration(node, 128, 899967)
-                : bindBlockScopedDeclaration(node, 256, 899327);
-        }
-        function bindVariableDeclarationOrBindingElement(node) {
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-            if (!ts.isBindingPattern(node.name)) {
-                if (ts.isBlockOrCatchScoped(node)) {
-                    bindBlockScopedVariableDeclaration(node);
-                }
-                else if (ts.isParameterDeclaration(node)) {
-                    declareSymbolAndAddToSymbolTable(node, 1, 107455);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 1, 107454);
-                }
-            }
-        }
-        function bindParameter(node) {
-            if (!ts.isDeclarationFile(file) &&
-                !ts.isInAmbientContext(node) &&
-                ts.nodeIsDecorated(node)) {
-                hasDecorators = true;
-                hasParameterDecorators = true;
-            }
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-            if (ts.isBindingPattern(node.name)) {
-                bindAnonymousDeclaration(node, 1, getDestructuringParameterName(node));
-            }
-            else {
-                declareSymbolAndAddToSymbolTable(node, 1, 107455);
-            }
-            if (ts.isParameterPropertyDeclaration(node)) {
-                var classDeclaration = node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4, 0);
-            }
-        }
-        function bindFunctionDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-            }
-            checkStrictModeFunctionName(node);
-            if (inStrictMode) {
-                checkStrictModeFunctionDeclaration(node);
-                return bindBlockScopedDeclaration(node, 16, 106927);
-            }
-            else {
-                return declareSymbolAndAddToSymbolTable(node, 16, 106927);
-            }
-        }
-        function bindFunctionExpression(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-            }
-            checkStrictModeFunctionName(node);
-            var bindingName = node.name ? node.name.text : "__function";
-            return bindAnonymousDeclaration(node, 16, bindingName);
-        }
-        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-                if (ts.nodeIsDecorated(node)) {
-                    hasDecorators = true;
-                }
-            }
-            return ts.hasDynamicName(node)
-                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
-                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
-        }
-        function shouldReportErrorOnModuleDeclaration(node) {
-            var instanceState = getModuleInstanceState(node);
-            return instanceState === 1 || (instanceState === 2 && options.preserveConstEnums);
-        }
-        function checkUnreachable(node) {
-            if (!(currentFlow.flags & 1)) {
-                return false;
-            }
-            if (currentFlow === unreachableFlow) {
-                var reportError = (ts.isStatement(node) && node.kind !== 201) ||
-                    node.kind === 221 ||
-                    (node.kind === 225 && shouldReportErrorOnModuleDeclaration(node)) ||
-                    (node.kind === 224 && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
-                if (reportError) {
-                    currentFlow = reportedUnreachableFlow;
-                    var reportUnreachableCode = !options.allowUnreachableCode &&
-                        !ts.isInAmbientContext(node) &&
-                        (node.kind !== 200 ||
-                            ts.getCombinedNodeFlags(node.declarationList) & 3072 ||
-                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
-                    if (reportUnreachableCode) {
-                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
-                    }
-                }
-            }
-            return true;
-        }
-    }
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var nextSymbolId = 1;
-    var nextNodeId = 1;
-    var nextMergeId = 1;
-    var nextFlowId = 1;
-    function getNodeId(node) {
-        if (!node.id) {
-            node.id = nextNodeId;
-            nextNodeId++;
-        }
-        return node.id;
-    }
-    ts.getNodeId = getNodeId;
-    ts.checkTime = 0;
-    function getSymbolId(symbol) {
-        if (!symbol.id) {
-            symbol.id = nextSymbolId;
-            nextSymbolId++;
-        }
-        return symbol.id;
-    }
-    ts.getSymbolId = getSymbolId;
-    function createTypeChecker(host, produceDiagnostics) {
-        var cancellationToken;
-        var Symbol = ts.objectAllocator.getSymbolConstructor();
-        var Type = ts.objectAllocator.getTypeConstructor();
-        var Signature = ts.objectAllocator.getSignatureConstructor();
-        var typeCount = 0;
-        var symbolCount = 0;
-        var emptyArray = [];
-        var emptySymbols = {};
-        var compilerOptions = host.getCompilerOptions();
-        var languageVersion = compilerOptions.target || 0;
-        var modulekind = ts.getEmitModuleKind(compilerOptions);
-        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
-        var strictNullChecks = compilerOptions.strictNullChecks;
-        var emitResolver = createResolver();
-        var undefinedSymbol = createSymbol(4 | 67108864, "undefined");
-        undefinedSymbol.declarations = [];
-        var argumentsSymbol = createSymbol(4 | 67108864, "arguments");
-        var checker = {
-            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
-            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
-            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
-            getTypeCount: function () { return typeCount; },
-            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
-            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
-            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
-            getDiagnostics: getDiagnostics,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getTypeOfSymbolAtLocation: getTypeOfSymbolAtLocation,
-            getSymbolsOfParameterPropertyDeclaration: getSymbolsOfParameterPropertyDeclaration,
-            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
-            getPropertiesOfType: getPropertiesOfType,
-            getPropertyOfType: getPropertyOfType,
-            getSignaturesOfType: getSignaturesOfType,
-            getIndexTypeOfType: getIndexTypeOfType,
-            getBaseTypes: getBaseTypes,
-            getReturnTypeOfSignature: getReturnTypeOfSignature,
-            getNonNullableType: getNonNullableType,
-            getSymbolsInScope: getSymbolsInScope,
-            getSymbolAtLocation: getSymbolAtLocation,
-            getShorthandAssignmentValueSymbol: getShorthandAssignmentValueSymbol,
-            getExportSpecifierLocalTargetSymbol: getExportSpecifierLocalTargetSymbol,
-            getTypeAtLocation: getTypeOfNode,
-            getPropertySymbolOfDestructuringAssignment: getPropertySymbolOfDestructuringAssignment,
-            typeToString: typeToString,
-            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
-            symbolToString: symbolToString,
-            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
-            getRootSymbols: getRootSymbols,
-            getContextualType: getContextualType,
-            getFullyQualifiedName: getFullyQualifiedName,
-            getResolvedSignature: getResolvedSignature,
-            getConstantValue: getConstantValue,
-            isValidPropertyAccess: isValidPropertyAccess,
-            getSignatureFromDeclaration: getSignatureFromDeclaration,
-            isImplementationOfOverload: isImplementationOfOverload,
-            getAliasedSymbol: resolveAlias,
-            getEmitResolver: getEmitResolver,
-            getExportsOfModule: getExportsOfModuleAsArray,
-            getJsxElementAttributesType: getJsxElementAttributesType,
-            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
-            isOptionalParameter: isOptionalParameter
-        };
-        var unknownSymbol = createSymbol(4 | 67108864, "unknown");
-        var resolvingSymbol = createSymbol(67108864, "__resolving__");
-        var nullableWideningFlags = strictNullChecks ? 0 : 2097152;
-        var anyType = createIntrinsicType(1, "any");
-        var stringType = createIntrinsicType(2, "string");
-        var numberType = createIntrinsicType(4, "number");
-        var booleanType = createIntrinsicType(8, "boolean");
-        var esSymbolType = createIntrinsicType(16777216, "symbol");
-        var voidType = createIntrinsicType(16, "void");
-        var undefinedType = createIntrinsicType(32 | nullableWideningFlags, "undefined");
-        var nullType = createIntrinsicType(64 | nullableWideningFlags, "null");
-        var emptyArrayElementType = createIntrinsicType(32 | 2097152, "undefined");
-        var unknownType = createIntrinsicType(1, "unknown");
-        var neverType = createIntrinsicType(134217728, "never");
-        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        emptyGenericType.instantiations = {};
-        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        anyFunctionType.flags |= 8388608;
-        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, undefined, 0, false, false);
-        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, undefined, 0, false, false);
-        var enumNumberIndexInfo = createIndexInfo(stringType, true);
-        var globals = {};
-        var getGlobalESSymbolConstructorSymbol;
-        var getGlobalPromiseConstructorSymbol;
-        var globalObjectType;
-        var globalFunctionType;
-        var globalArrayType;
-        var globalReadonlyArrayType;
-        var globalStringType;
-        var globalNumberType;
-        var globalBooleanType;
-        var globalRegExpType;
-        var anyArrayType;
-        var anyReadonlyArrayType;
-        var getGlobalTemplateStringsArrayType;
-        var getGlobalESSymbolType;
-        var getGlobalIterableType;
-        var getGlobalIteratorType;
-        var getGlobalIterableIteratorType;
-        var getGlobalClassDecoratorType;
-        var getGlobalParameterDecoratorType;
-        var getGlobalPropertyDecoratorType;
-        var getGlobalMethodDecoratorType;
-        var getGlobalTypedPropertyDescriptorType;
-        var getGlobalPromiseType;
-        var tryGetGlobalPromiseType;
-        var getGlobalPromiseLikeType;
-        var getInstantiatedGlobalPromiseLikeType;
-        var getGlobalPromiseConstructorLikeType;
-        var getGlobalThenableType;
-        var jsxElementClassType;
-        var deferredNodes;
-        var flowLoopStart = 0;
-        var flowLoopCount = 0;
-        var visitedFlowCount = 0;
-        var tupleTypes = {};
-        var unionTypes = {};
-        var intersectionTypes = {};
-        var stringLiteralTypes = {};
-        var resolutionTargets = [];
-        var resolutionResults = [];
-        var resolutionPropertyNames = [];
-        var mergedSymbols = [];
-        var symbolLinks = [];
-        var nodeLinks = [];
-        var flowLoopCaches = [];
-        var flowLoopNodes = [];
-        var flowLoopKeys = [];
-        var flowLoopTypes = [];
-        var visitedFlowNodes = [];
-        var visitedFlowTypes = [];
-        var potentialThisCollisions = [];
-        var awaitedTypeStack = [];
-        var diagnostics = ts.createDiagnosticCollection();
-        var typeofEQFacts = {
-            "string": 1,
-            "number": 2,
-            "boolean": 4,
-            "symbol": 8,
-            "undefined": 16384,
-            "object": 16,
-            "function": 32
-        };
-        var typeofNEFacts = {
-            "string": 128,
-            "number": 256,
-            "boolean": 512,
-            "symbol": 1024,
-            "undefined": 131072,
-            "object": 2048,
-            "function": 4096
-        };
-        var typeofTypesByName = {
-            "string": stringType,
-            "number": numberType,
-            "boolean": booleanType,
-            "symbol": esSymbolType,
-            "undefined": undefinedType
-        };
-        var jsxElementType;
-        var jsxTypes = {};
-        var JsxNames = {
-            JSX: "JSX",
-            IntrinsicElements: "IntrinsicElements",
-            ElementClass: "ElementClass",
-            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
-            Element: "Element",
-            IntrinsicAttributes: "IntrinsicAttributes",
-            IntrinsicClassAttributes: "IntrinsicClassAttributes"
-        };
-        var subtypeRelation = {};
-        var assignableRelation = {};
-        var comparableRelation = {};
-        var identityRelation = {};
-        var _displayBuilder;
-        var builtinGlobals = (_a = {},
-            _a[undefinedSymbol.name] = undefinedSymbol,
-            _a
-        );
-        initializeTypeChecker();
-        return checker;
-        function getEmitResolver(sourceFile, cancellationToken) {
-            getDiagnostics(sourceFile, cancellationToken);
-            return emitResolver;
-        }
-        function error(location, message, arg0, arg1, arg2) {
-            var diagnostic = location
-                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
-                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
-            diagnostics.add(diagnostic);
-        }
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
-        }
-        function getExcludedSymbolFlags(flags) {
-            var result = 0;
-            if (flags & 2)
-                result |= 107455;
-            if (flags & 1)
-                result |= 107454;
-            if (flags & 4)
-                result |= 0;
-            if (flags & 8)
-                result |= 107455;
-            if (flags & 16)
-                result |= 106927;
-            if (flags & 32)
-                result |= 899519;
-            if (flags & 64)
-                result |= 792960;
-            if (flags & 256)
-                result |= 899327;
-            if (flags & 128)
-                result |= 899967;
-            if (flags & 512)
-                result |= 106639;
-            if (flags & 8192)
-                result |= 99263;
-            if (flags & 32768)
-                result |= 41919;
-            if (flags & 65536)
-                result |= 74687;
-            if (flags & 262144)
-                result |= 530912;
-            if (flags & 524288)
-                result |= 793056;
-            if (flags & 8388608)
-                result |= 8388608;
-            return result;
-        }
-        function recordMergedSymbol(target, source) {
-            if (!source.mergeId) {
-                source.mergeId = nextMergeId;
-                nextMergeId++;
-            }
-            mergedSymbols[source.mergeId] = target;
-        }
-        function cloneSymbol(symbol) {
-            var result = createSymbol(symbol.flags | 33554432, symbol.name);
-            result.declarations = symbol.declarations.slice(0);
-            result.parent = symbol.parent;
-            if (symbol.valueDeclaration)
-                result.valueDeclaration = symbol.valueDeclaration;
-            if (symbol.constEnumOnlyModule)
-                result.constEnumOnlyModule = true;
-            if (symbol.members)
-                result.members = cloneSymbolTable(symbol.members);
-            if (symbol.exports)
-                result.exports = cloneSymbolTable(symbol.exports);
-            recordMergedSymbol(result, symbol);
-            return result;
-        }
-        function mergeSymbol(target, source) {
-            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
-                if (source.flags & 512 && target.flags & 512 && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
-                    target.constEnumOnlyModule = false;
-                }
-                target.flags |= source.flags;
-                if (source.valueDeclaration &&
-                    (!target.valueDeclaration ||
-                        (target.valueDeclaration.kind === 225 && source.valueDeclaration.kind !== 225))) {
-                    target.valueDeclaration = source.valueDeclaration;
-                }
-                ts.forEach(source.declarations, function (node) {
-                    target.declarations.push(node);
-                });
-                if (source.members) {
-                    if (!target.members)
-                        target.members = {};
-                    mergeSymbolTable(target.members, source.members);
-                }
-                if (source.exports) {
-                    if (!target.exports)
-                        target.exports = {};
-                    mergeSymbolTable(target.exports, source.exports);
-                }
-                recordMergedSymbol(target, source);
-            }
-            else {
-                var message_2 = target.flags & 2 || source.flags & 2
-                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
-                ts.forEach(source.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
-                ts.forEach(target.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
-            }
-        }
-        function cloneSymbolTable(symbolTable) {
-            var result = {};
-            for (var id in symbolTable) {
-                if (ts.hasProperty(symbolTable, id)) {
-                    result[id] = symbolTable[id];
-                }
-            }
-            return result;
-        }
-        function mergeSymbolTable(target, source) {
-            for (var id in source) {
-                if (ts.hasProperty(source, id)) {
-                    if (!ts.hasProperty(target, id)) {
-                        target[id] = source[id];
-                    }
-                    else {
-                        var symbol = target[id];
-                        if (!(symbol.flags & 33554432)) {
-                            target[id] = symbol = cloneSymbol(symbol);
-                        }
-                        mergeSymbol(symbol, source[id]);
-                    }
-                }
-            }
-        }
-        function mergeModuleAugmentation(moduleName) {
-            var moduleAugmentation = moduleName.parent;
-            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
-                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
-                return;
-            }
-            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
-                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
-            }
-            else {
-                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
-                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
-                    : undefined;
-                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError);
-                if (!mainModule) {
-                    return;
-                }
-                mainModule = resolveExternalModuleSymbol(mainModule);
-                if (mainModule.flags & 1536) {
-                    mainModule = mainModule.flags & 33554432 ? mainModule : cloneSymbol(mainModule);
-                    mergeSymbol(mainModule, moduleAugmentation.symbol);
-                }
-                else {
-                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
-                }
-            }
-        }
-        function addToSymbolTable(target, source, message) {
-            for (var id in source) {
-                if (ts.hasProperty(source, id)) {
-                    if (ts.hasProperty(target, id)) {
-                        ts.forEach(target[id].declarations, addDeclarationDiagnostic(id, message));
-                    }
-                    else {
-                        target[id] = source[id];
-                    }
-                }
-            }
-            function addDeclarationDiagnostic(id, message) {
-                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
-            }
-        }
-        function getSymbolLinks(symbol) {
-            if (symbol.flags & 67108864)
-                return symbol;
-            var id = getSymbolId(symbol);
-            return symbolLinks[id] || (symbolLinks[id] = {});
-        }
-        function getNodeLinks(node) {
-            var nodeId = getNodeId(node);
-            return nodeLinks[nodeId] || (nodeLinks[nodeId] = {});
-        }
-        function isGlobalSourceFile(node) {
-            return node.kind === 256 && !ts.isExternalOrCommonJsModule(node);
-        }
-        function getSymbol(symbols, name, meaning) {
-            if (meaning && ts.hasProperty(symbols, name)) {
-                var symbol = symbols[name];
-                ts.Debug.assert((symbol.flags & 16777216) === 0, "Should never get an instantiated symbol here.");
-                if (symbol.flags & meaning) {
-                    return symbol;
-                }
-                if (symbol.flags & 8388608) {
-                    var target = resolveAlias(symbol);
-                    if (target === unknownSymbol || target.flags & meaning) {
-                        return symbol;
-                    }
-                }
-            }
-        }
-        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
-            var constructorDeclaration = parameter.parent;
-            var classDeclaration = parameter.parent.parent;
-            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455);
-            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455);
-            if (parameterSymbol && propertySymbol) {
-                return [parameterSymbol, propertySymbol];
-            }
-            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
-        }
-        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
-            var declarationFile = ts.getSourceFileOfNode(declaration);
-            var useFile = ts.getSourceFileOfNode(usage);
-            if (declarationFile !== useFile) {
-                if (modulekind || (!compilerOptions.outFile && !compilerOptions.out)) {
-                    return true;
-                }
-                var sourceFiles = host.getSourceFiles();
-                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
-            }
-            if (declaration.pos <= usage.pos) {
-                return declaration.kind !== 218 ||
-                    !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
-            }
-            return isUsedInFunctionOrNonStaticProperty(declaration, usage);
-            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                switch (declaration.parent.parent.kind) {
-                    case 200:
-                    case 206:
-                    case 208:
-                        if (isSameScopeDescendentOf(usage, declaration, container)) {
-                            return true;
-                        }
-                        break;
-                }
-                switch (declaration.parent.parent.kind) {
-                    case 207:
-                    case 208:
-                        if (isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container)) {
-                            return true;
-                        }
-                }
-                return false;
-            }
-            function isUsedInFunctionOrNonStaticProperty(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                var current = usage;
-                while (current) {
-                    if (current === container) {
-                        return false;
-                    }
-                    if (ts.isFunctionLike(current)) {
-                        return true;
-                    }
-                    var initializerOfNonStaticProperty = current.parent &&
-                        current.parent.kind === 145 &&
-                        (current.parent.flags & 32) === 0 &&
-                        current.parent.initializer === current;
-                    if (initializerOfNonStaticProperty) {
-                        return true;
-                    }
-                    current = current.parent;
-                }
-                return false;
-            }
-        }
-        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg) {
-            var result;
-            var lastLocation;
-            var propertyWithInvalidInitializer;
-            var errorLocation = location;
-            var grandparent;
-            var isInExternalModule = false;
-            loop: while (location) {
-                if (location.locals && !isGlobalSourceFile(location)) {
-                    if (result = getSymbol(location.locals, name, meaning)) {
-                        var useResult = true;
-                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
-                            if (meaning & result.flags & 793056 && lastLocation.kind !== 273) {
-                                useResult = result.flags & 262144
-                                    ? lastLocation === location.type ||
-                                        lastLocation.kind === 142 ||
-                                        lastLocation.kind === 141
-                                    : false;
-                            }
-                            if (meaning & 107455 && result.flags & 1) {
-                                useResult =
-                                    lastLocation.kind === 142 ||
-                                        (lastLocation === location.type &&
-                                            result.valueDeclaration.kind === 142);
-                            }
-                        }
-                        if (useResult) {
-                            break loop;
-                        }
-                        else {
-                            result = undefined;
-                        }
-                    }
-                }
-                switch (location.kind) {
-                    case 256:
-                        if (!ts.isExternalOrCommonJsModule(location))
-                            break;
-                        isInExternalModule = true;
-                    case 225:
-                        var moduleExports = getSymbolOfNode(location).exports;
-                        if (location.kind === 256 || ts.isAmbientModule(location)) {
-                            if (result = moduleExports["default"]) {
-                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
-                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
-                                    break loop;
-                                }
-                                result = undefined;
-                            }
-                            if (ts.hasProperty(moduleExports, name) &&
-                                moduleExports[name].flags === 8388608 &&
-                                ts.getDeclarationOfKind(moduleExports[name], 238)) {
-                                break;
-                            }
-                        }
-                        if (result = getSymbol(moduleExports, name, meaning & 8914931)) {
-                            break loop;
-                        }
-                        break;
-                    case 224:
-                        if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & 8)) {
-                            break loop;
-                        }
-                        break;
-                    case 145:
-                    case 144:
-                        if (ts.isClassLike(location.parent) && !(location.flags & 32)) {
-                            var ctor = findConstructorDeclaration(location.parent);
-                            if (ctor && ctor.locals) {
-                                if (getSymbol(ctor.locals, name, meaning & 107455)) {
-                                    propertyWithInvalidInitializer = location;
-                                }
-                            }
-                        }
-                        break;
-                    case 221:
-                    case 192:
-                    case 222:
-                        if (result = getSymbol(getSymbolOfNode(location).members, name, meaning & 793056)) {
-                            if (lastLocation && lastLocation.flags & 32) {
-                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
-                                return undefined;
-                            }
-                            break loop;
-                        }
-                        if (location.kind === 192 && meaning & 32) {
-                            var className = location.name;
-                            if (className && name === className.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    case 140:
-                        grandparent = location.parent.parent;
-                        if (ts.isClassLike(grandparent) || grandparent.kind === 222) {
-                            if (result = getSymbol(getSymbolOfNode(grandparent).members, name, meaning & 793056)) {
-                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
-                                return undefined;
-                            }
-                        }
-                        break;
-                    case 147:
-                    case 146:
-                    case 148:
-                    case 149:
-                    case 150:
-                    case 220:
-                    case 180:
-                        if (meaning & 3 && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        break;
-                    case 179:
-                        if (meaning & 3 && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        if (meaning & 16) {
-                            var functionName = location.name;
-                            if (functionName && name === functionName.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    case 143:
-                        if (location.parent && location.parent.kind === 142) {
-                            location = location.parent;
-                        }
-                        if (location.parent && ts.isClassElement(location.parent)) {
-                            location = location.parent;
-                        }
-                        break;
-                }
-                lastLocation = location;
-                location = location.parent;
-            }
-            if (!result) {
-                result = getSymbol(globals, name, meaning);
-            }
-            if (!result) {
-                if (nameNotFoundMessage) {
-                    if (!checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg)) {
-                        error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    }
-                }
-                return undefined;
-            }
-            if (nameNotFoundMessage) {
-                if (propertyWithInvalidInitializer) {
-                    var propertyName = propertyWithInvalidInitializer.name;
-                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    return undefined;
-                }
-                if (meaning & 2) {
-                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
-                    if (exportOrLocalSymbol.flags & 2) {
-                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
-                    }
-                }
-                if (result && isInExternalModule) {
-                    var decls = result.declarations;
-                    if (decls && decls.length === 1 && decls[0].kind === 228) {
-                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
-                    }
-                }
-            }
-            return result;
-        }
-        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
-            if (!errorLocation || (errorLocation.kind === 69 && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
-                return false;
-            }
-            var container = ts.getThisContainer(errorLocation, true);
-            var location = container;
-            while (location) {
-                if (ts.isClassLike(location.parent)) {
-                    var classSymbol = getSymbolOfNode(location.parent);
-                    if (!classSymbol) {
-                        break;
-                    }
-                    var constructorType = getTypeOfSymbol(classSymbol);
-                    if (getPropertyOfType(constructorType, name)) {
-                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
-                        return true;
-                    }
-                    if (location === container && !(location.flags & 32)) {
-                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
-                        if (getPropertyOfType(instanceType, name)) {
-                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                            return true;
-                        }
-                    }
-                }
-                location = location.parent;
-            }
-            return false;
-        }
-        function checkResolvedBlockScopedVariable(result, errorLocation) {
-            ts.Debug.assert((result.flags & 2) !== 0);
-            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) ? d : undefined; });
-            ts.Debug.assert(declaration !== undefined, "Block-scoped variable declaration is undefined");
-            if (!isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 218), errorLocation)) {
-                error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
-            }
-        }
-        function isSameScopeDescendentOf(initial, parent, stopAt) {
-            if (!parent) {
-                return false;
-            }
-            for (var current = initial; current && current !== stopAt && !ts.isFunctionLike(current); current = current.parent) {
-                if (current === parent) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function getAnyImportSyntax(node) {
-            if (ts.isAliasSymbolDeclaration(node)) {
-                if (node.kind === 229) {
-                    return node;
-                }
-                while (node && node.kind !== 230) {
-                    node = node.parent;
-                }
-                return node;
-            }
-        }
-        function getDeclarationOfAliasSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isAliasSymbolDeclaration(d) ? d : undefined; });
-        }
-        function getTargetOfImportEqualsDeclaration(node) {
-            if (node.moduleReference.kind === 240) {
-                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
-            }
-            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, node);
-        }
-        function getTargetOfImportClause(node) {
-            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
-            if (moduleSymbol) {
-                var exportDefaultSymbol = moduleSymbol.exports["export="] ?
-                    getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
-                    resolveSymbol(moduleSymbol.exports["default"]);
-                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
-                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
-                }
-                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
-                    return resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
-                }
-                return exportDefaultSymbol;
-            }
-        }
-        function getTargetOfNamespaceImport(node) {
-            var moduleSpecifier = node.parent.parent.moduleSpecifier;
-            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier);
-        }
-        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
-            if (valueSymbol.flags & (793056 | 1536)) {
-                return valueSymbol;
-            }
-            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
-            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
-            result.parent = valueSymbol.parent || typeSymbol.parent;
-            if (valueSymbol.valueDeclaration)
-                result.valueDeclaration = valueSymbol.valueDeclaration;
-            if (typeSymbol.members)
-                result.members = typeSymbol.members;
-            if (valueSymbol.exports)
-                result.exports = valueSymbol.exports;
-            return result;
-        }
-        function getExportOfModule(symbol, name) {
-            if (symbol.flags & 1536) {
-                var exports_1 = getExportsOfSymbol(symbol);
-                if (ts.hasProperty(exports_1, name)) {
-                    return resolveSymbol(exports_1[name]);
-                }
-            }
-        }
-        function getPropertyOfVariable(symbol, name) {
-            if (symbol.flags & 3) {
-                var typeAnnotation = symbol.valueDeclaration.type;
-                if (typeAnnotation) {
-                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
-                }
-            }
-        }
-        function getExternalModuleMember(node, specifier) {
-            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier);
-            if (targetSymbol) {
-                var name_9 = specifier.propertyName || specifier.name;
-                if (name_9.text) {
-                    var symbolFromVariable = void 0;
-                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
-                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_9.text);
-                    }
-                    else {
-                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_9.text);
-                    }
-                    symbolFromVariable = resolveSymbol(symbolFromVariable);
-                    var symbolFromModule = getExportOfModule(targetSymbol, name_9.text);
-                    var symbol = symbolFromModule && symbolFromVariable ?
-                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
-                        symbolFromModule || symbolFromVariable;
-                    if (!symbol) {
-                        error(name_9, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_9));
-                    }
-                    return symbol;
-                }
-            }
-        }
-        function getTargetOfImportSpecifier(node) {
-            return getExternalModuleMember(node.parent.parent.parent, node);
-        }
-        function getTargetOfGlobalModuleExportDeclaration(node) {
-            return resolveExternalModuleSymbol(node.parent.symbol);
-        }
-        function getTargetOfExportSpecifier(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 | 793056 | 1536);
-        }
-        function getTargetOfExportAssignment(node) {
-            return resolveEntityName(node.expression, 107455 | 793056 | 1536);
-        }
-        function getTargetOfAliasDeclaration(node) {
-            switch (node.kind) {
-                case 229:
-                    return getTargetOfImportEqualsDeclaration(node);
-                case 231:
-                    return getTargetOfImportClause(node);
-                case 232:
-                    return getTargetOfNamespaceImport(node);
-                case 234:
-                    return getTargetOfImportSpecifier(node);
-                case 238:
-                    return getTargetOfExportSpecifier(node);
-                case 235:
-                    return getTargetOfExportAssignment(node);
-                case 228:
-                    return getTargetOfGlobalModuleExportDeclaration(node);
-            }
-        }
-        function resolveSymbol(symbol) {
-            return symbol && symbol.flags & 8388608 && !(symbol.flags & (107455 | 793056 | 1536)) ? resolveAlias(symbol) : symbol;
-        }
-        function resolveAlias(symbol) {
-            ts.Debug.assert((symbol.flags & 8388608) !== 0, "Should only get Alias here.");
-            var links = getSymbolLinks(symbol);
-            if (!links.target) {
-                links.target = resolvingSymbol;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                var target = getTargetOfAliasDeclaration(node);
-                if (links.target === resolvingSymbol) {
-                    links.target = target || unknownSymbol;
-                }
-                else {
-                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
-                }
-            }
-            else if (links.target === resolvingSymbol) {
-                links.target = unknownSymbol;
-            }
-            return links.target;
-        }
-        function markExportAsReferenced(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target) {
-                var markAlias = target === unknownSymbol ||
-                    ((target.flags & 107455) && !isConstEnumOrConstEnumOnlyModule(target));
-                if (markAlias) {
-                    markAliasSymbolAsReferenced(symbol);
-                }
-            }
-        }
-        function markAliasSymbolAsReferenced(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.referenced) {
-                links.referenced = true;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                if (node.kind === 235) {
-                    checkExpressionCached(node.expression);
-                }
-                else if (node.kind === 238) {
-                    checkExpressionCached(node.propertyName || node.name);
-                }
-                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    checkExpressionCached(node.moduleReference);
-                }
-            }
-        }
-        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importDeclaration) {
-            if (!importDeclaration) {
-                importDeclaration = ts.getAncestor(entityName, 229);
-                ts.Debug.assert(importDeclaration !== undefined);
-            }
-            if (entityName.kind === 69 && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
-            }
-            if (entityName.kind === 69 || entityName.parent.kind === 139) {
-                return resolveEntityName(entityName, 1536);
-            }
-            else {
-                ts.Debug.assert(entityName.parent.kind === 229);
-                return resolveEntityName(entityName, 107455 | 793056 | 1536);
-            }
-        }
-        function getFullyQualifiedName(symbol) {
-            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
-        }
-        function resolveEntityName(name, meaning, ignoreErrors) {
-            if (ts.nodeIsMissing(name)) {
-                return undefined;
-            }
-            var symbol;
-            if (name.kind === 69) {
-                var message = meaning === 1536 ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
-                symbol = resolveName(name, name.text, meaning, ignoreErrors ? undefined : message, name);
-                if (!symbol) {
-                    return undefined;
-                }
-            }
-            else if (name.kind === 139 || name.kind === 172) {
-                var left = name.kind === 139 ? name.left : name.expression;
-                var right = name.kind === 139 ? name.right : name.name;
-                var namespace = resolveEntityName(left, 1536, ignoreErrors);
-                if (!namespace || namespace === unknownSymbol || ts.nodeIsMissing(right)) {
-                    return undefined;
-                }
-                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
-                if (!symbol) {
-                    if (!ignoreErrors) {
-                        error(right, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
-                    }
-                    return undefined;
-                }
-            }
-            else {
-                ts.Debug.fail("Unknown entity name kind.");
-            }
-            ts.Debug.assert((symbol.flags & 16777216) === 0, "Should never get an instantiated symbol here.");
-            return symbol.flags & meaning ? symbol : resolveAlias(symbol);
-        }
-        function resolveExternalModuleName(location, moduleReferenceExpression) {
-            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
-        }
-        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError) {
-            if (moduleReferenceExpression.kind !== 9) {
-                return;
-            }
-            var moduleReferenceLiteral = moduleReferenceExpression;
-            var moduleName = ts.escapeIdentifier(moduleReferenceLiteral.text);
-            if (moduleName === undefined) {
-                return;
-            }
-            var isRelative = ts.isExternalModuleNameRelative(moduleName);
-            if (!isRelative) {
-                var symbol = getSymbol(globals, '"' + moduleName + '"', 512);
-                if (symbol) {
-                    return getMergedSymbol(symbol);
-                }
-            }
-            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReferenceLiteral.text);
-            var sourceFile = resolvedModule && host.getSourceFile(resolvedModule.resolvedFileName);
-            if (sourceFile) {
-                if (sourceFile.symbol) {
-                    return getMergedSymbol(sourceFile.symbol);
-                }
-                if (moduleNotFoundError) {
-                    error(moduleReferenceLiteral, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
-                }
-                return undefined;
-            }
-            if (moduleNotFoundError) {
-                error(moduleReferenceLiteral, moduleNotFoundError, moduleName);
-            }
-            return undefined;
-        }
-        function resolveExternalModuleSymbol(moduleSymbol) {
-            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports["export="])) || moduleSymbol;
-        }
-        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression) {
-            var symbol = resolveExternalModuleSymbol(moduleSymbol);
-            if (symbol && !(symbol.flags & (1536 | 3))) {
-                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
-                symbol = undefined;
-            }
-            return symbol;
-        }
-        function hasExportAssignmentSymbol(moduleSymbol) {
-            return moduleSymbol.exports["export="] !== undefined;
-        }
-        function getExportsOfModuleAsArray(moduleSymbol) {
-            return symbolsToArray(getExportsOfModule(moduleSymbol));
-        }
-        function getExportsOfSymbol(symbol) {
-            return symbol.flags & 1536 ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
-        }
-        function getExportsOfModule(moduleSymbol) {
-            var links = getSymbolLinks(moduleSymbol);
-            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
-        }
-        function extendExportSymbols(target, source, lookupTable, exportNode) {
-            for (var id in source) {
-                if (id !== "default" && !ts.hasProperty(target, id)) {
-                    target[id] = source[id];
-                    if (lookupTable && exportNode) {
-                        lookupTable[id] = {
-                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
-                        };
-                    }
-                }
-                else if (lookupTable && exportNode && id !== "default" && ts.hasProperty(target, id) && resolveSymbol(target[id]) !== resolveSymbol(source[id])) {
-                    if (!lookupTable[id].exportsWithDuplicate) {
-                        lookupTable[id].exportsWithDuplicate = [exportNode];
-                    }
-                    else {
-                        lookupTable[id].exportsWithDuplicate.push(exportNode);
-                    }
-                }
-            }
-        }
-        function getExportsForModule(moduleSymbol) {
-            var visitedSymbols = [];
-            return visit(moduleSymbol) || moduleSymbol.exports;
-            function visit(symbol) {
-                if (!(symbol && symbol.flags & 1952 && !ts.contains(visitedSymbols, symbol))) {
-                    return;
-                }
-                visitedSymbols.push(symbol);
-                var symbols = cloneSymbolTable(symbol.exports);
-                var exportStars = symbol.exports["__export"];
-                if (exportStars) {
-                    var nestedSymbols = {};
-                    var lookupTable = {};
-                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
-                        var node = _a[_i];
-                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
-                        var exportedSymbols = visit(resolvedModule);
-                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable, node);
-                    }
-                    for (var id in lookupTable) {
-                        var exportsWithDuplicate = lookupTable[id].exportsWithDuplicate;
-                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || ts.hasProperty(symbols, id)) {
-                            continue;
-                        }
-                        for (var _b = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _b < exportsWithDuplicate_1.length; _b++) {
-                            var node = exportsWithDuplicate_1[_b];
-                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable[id].specifierText, id));
-                        }
-                    }
-                    extendExportSymbols(symbols, nestedSymbols);
-                }
-                return symbols;
-            }
-        }
-        function getMergedSymbol(symbol) {
-            var merged;
-            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
-        }
-        function getSymbolOfNode(node) {
-            return getMergedSymbol(node.symbol);
-        }
-        function getParentOfSymbol(symbol) {
-            return getMergedSymbol(symbol.parent);
-        }
-        function getExportSymbolOfValueSymbolIfExported(symbol) {
-            return symbol && (symbol.flags & 1048576) !== 0
-                ? getMergedSymbol(symbol.exportSymbol)
-                : symbol;
-        }
-        function symbolIsValue(symbol) {
-            if (symbol.flags & 16777216) {
-                return symbolIsValue(getSymbolLinks(symbol).target);
-            }
-            if (symbol.flags & 107455) {
-                return true;
-            }
-            if (symbol.flags & 8388608) {
-                return (resolveAlias(symbol).flags & 107455) !== 0;
-            }
-            return false;
-        }
-        function findConstructorDeclaration(node) {
-            var members = node.members;
-            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
-                var member = members_1[_i];
-                if (member.kind === 148 && ts.nodeIsPresent(member.body)) {
-                    return member;
-                }
-            }
-        }
-        function createType(flags) {
-            var result = new Type(checker, flags);
-            result.id = typeCount;
-            typeCount++;
-            return result;
-        }
-        function createIntrinsicType(kind, intrinsicName) {
-            var type = createType(kind);
-            type.intrinsicName = intrinsicName;
-            return type;
-        }
-        function createObjectType(kind, symbol) {
-            var type = createType(kind);
-            type.symbol = symbol;
-            return type;
-        }
-        function isReservedMemberName(name) {
-            return name.charCodeAt(0) === 95 &&
-                name.charCodeAt(1) === 95 &&
-                name.charCodeAt(2) !== 95 &&
-                name.charCodeAt(2) !== 64;
-        }
-        function getNamedMembers(members) {
-            var result;
-            for (var id in members) {
-                if (ts.hasProperty(members, id)) {
-                    if (!isReservedMemberName(id)) {
-                        if (!result)
-                            result = [];
-                        var symbol = members[id];
-                        if (symbolIsValue(symbol)) {
-                            result.push(symbol);
-                        }
-                    }
-                }
-            }
-            return result || emptyArray;
-        }
-        function setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            type.members = members;
-            type.properties = getNamedMembers(members);
-            type.callSignatures = callSignatures;
-            type.constructSignatures = constructSignatures;
-            if (stringIndexInfo)
-                type.stringIndexInfo = stringIndexInfo;
-            if (numberIndexInfo)
-                type.numberIndexInfo = numberIndexInfo;
-            return type;
-        }
-        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            return setObjectTypeMembers(createObjectType(65536, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
-            var result;
-            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
-                if (location_1.locals && !isGlobalSourceFile(location_1)) {
-                    if (result = callback(location_1.locals)) {
-                        return result;
-                    }
-                }
-                switch (location_1.kind) {
-                    case 256:
-                        if (!ts.isExternalOrCommonJsModule(location_1)) {
-                            break;
-                        }
-                    case 225:
-                        if (result = callback(getSymbolOfNode(location_1).exports)) {
-                            return result;
-                        }
-                        break;
-                }
-            }
-            return callback(globals);
-        }
-        function getQualifiedLeftMeaning(rightMeaning) {
-            return rightMeaning === 107455 ? 107455 : 1536;
-        }
-        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
-            function getAccessibleSymbolChainFromSymbolTable(symbols) {
-                function canQualifySymbol(symbolFromSymbolTable, meaning) {
-                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
-                        return true;
-                    }
-                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
-                    return !!accessibleParent;
-                }
-                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
-                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
-                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
-                            canQualifySymbol(symbolFromSymbolTable, meaning);
-                    }
-                }
-                if (isAccessible(ts.lookUp(symbols, symbol.name))) {
-                    return [symbol];
-                }
-                return ts.forEachValue(symbols, function (symbolFromSymbolTable) {
-                    if (symbolFromSymbolTable.flags & 8388608
-                        && symbolFromSymbolTable.name !== "export="
-                        && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238)) {
-                        if (!useOnlyExternalAliasing ||
-                            ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
-                            var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
-                            if (isAccessible(symbolFromSymbolTable, resolveAlias(symbolFromSymbolTable))) {
-                                return [symbolFromSymbolTable];
-                            }
-                            var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTable(resolvedImportedSymbol.exports) : undefined;
-                            if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
-                                return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
-                            }
-                        }
-                    }
-                });
-            }
-            if (symbol) {
-                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
-                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
-                }
-            }
-        }
-        function needsQualification(symbol, enclosingDeclaration, meaning) {
-            var qualify = false;
-            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
-                if (!ts.hasProperty(symbolTable, symbol.name)) {
-                    return false;
-                }
-                var symbolFromSymbolTable = symbolTable[symbol.name];
-                if (symbolFromSymbolTable === symbol) {
-                    return true;
-                }
-                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
-                if (symbolFromSymbolTable.flags & meaning) {
-                    qualify = true;
-                    return true;
-                }
-                return false;
-            });
-            return qualify;
-        }
-        function isPropertyOrMethodDeclarationSymbol(symbol) {
-            if (symbol.declarations && symbol.declarations.length) {
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var declaration = _a[_i];
-                    switch (declaration.kind) {
-                        case 145:
-                        case 147:
-                        case 149:
-                        case 150:
-                            continue;
-                        default:
-                            return false;
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function isSymbolAccessible(symbol, enclosingDeclaration, meaning) {
-            if (symbol && enclosingDeclaration && !(symbol.flags & 262144)) {
-                var initialSymbol = symbol;
-                var meaningToLook = meaning;
-                while (symbol) {
-                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, false);
-                    if (accessibleSymbolChain) {
-                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0]);
-                        if (!hasAccessibleDeclarations) {
-                            return {
-                                accessibility: 1,
-                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1536) : undefined
-                            };
-                        }
-                        return hasAccessibleDeclarations;
-                    }
-                    meaningToLook = getQualifiedLeftMeaning(meaning);
-                    symbol = getParentOfSymbol(symbol);
-                }
-                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
-                if (symbolExternalModule) {
-                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
-                    if (symbolExternalModule !== enclosingExternalModule) {
-                        return {
-                            accessibility: 2,
-                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                            errorModuleName: symbolToString(symbolExternalModule)
-                        };
-                    }
-                }
-                return {
-                    accessibility: 1,
-                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning)
-                };
-            }
-            return { accessibility: 0 };
-            function getExternalModuleContainer(declaration) {
-                for (; declaration; declaration = declaration.parent) {
-                    if (hasExternalModuleSymbol(declaration)) {
-                        return getSymbolOfNode(declaration);
-                    }
-                }
-            }
-        }
-        function hasExternalModuleSymbol(declaration) {
-            return ts.isAmbientModule(declaration) || (declaration.kind === 256 && ts.isExternalOrCommonJsModule(declaration));
-        }
-        function hasVisibleDeclarations(symbol) {
-            var aliasesToMakeVisible;
-            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
-                return undefined;
-            }
-            return { accessibility: 0, aliasesToMakeVisible: aliasesToMakeVisible };
-            function getIsDeclarationVisible(declaration) {
-                if (!isDeclarationVisible(declaration)) {
-                    var anyImportSyntax = getAnyImportSyntax(declaration);
-                    if (anyImportSyntax &&
-                        !(anyImportSyntax.flags & 1) &&
-                        isDeclarationVisible(anyImportSyntax.parent)) {
-                        getNodeLinks(declaration).isVisible = true;
-                        if (aliasesToMakeVisible) {
-                            if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
-                                aliasesToMakeVisible.push(anyImportSyntax);
-                            }
-                        }
-                        else {
-                            aliasesToMakeVisible = [anyImportSyntax];
-                        }
-                        return true;
-                    }
-                    return false;
-                }
-                return true;
-            }
-        }
-        function isEntityNameVisible(entityName, enclosingDeclaration) {
-            var meaning;
-            if (entityName.parent.kind === 158 || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                meaning = 107455 | 1048576;
-            }
-            else if (entityName.kind === 139 || entityName.kind === 172 ||
-                entityName.parent.kind === 229) {
-                meaning = 1536;
-            }
-            else {
-                meaning = 793056;
-            }
-            var firstIdentifier = getFirstIdentifier(entityName);
-            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, undefined, undefined);
-            return (symbol && hasVisibleDeclarations(symbol)) || {
-                accessibility: 1,
-                errorSymbolName: ts.getTextOfNode(firstIdentifier),
-                errorNode: firstIdentifier
-            };
-        }
-        function writeKeyword(writer, kind) {
-            writer.writeKeyword(ts.tokenToString(kind));
-        }
-        function writePunctuation(writer, kind) {
-            writer.writePunctuation(ts.tokenToString(kind));
-        }
-        function writeSpace(writer) {
-            writer.writeSpace(" ");
-        }
-        function symbolToString(symbol, enclosingDeclaration, meaning) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function signatureToString(signature, enclosingDeclaration, flags, kind) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function typeToString(type, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            var maxLength = compilerOptions.noErrorTruncation || flags & 4 ? undefined : 100;
-            if (maxLength && result.length >= maxLength) {
-                result = result.substr(0, maxLength - "...".length) + "...";
-            }
-            return result;
-        }
-        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function visibilityToString(flags) {
-            if (flags === 8) {
-                return "private";
-            }
-            if (flags === 16) {
-                return "protected";
-            }
-            return "public";
-        }
-        function getTypeAliasForTypeLiteral(type) {
-            if (type.symbol && type.symbol.flags & 2048) {
-                var node = type.symbol.declarations[0].parent;
-                while (node.kind === 164) {
-                    node = node.parent;
-                }
-                if (node.kind === 223) {
-                    return getSymbolOfNode(node);
-                }
-            }
-            return undefined;
-        }
-        function isTopLevelInExternalModuleAugmentation(node) {
-            return node && node.parent &&
-                node.parent.kind === 226 &&
-                ts.isExternalModuleAugmentation(node.parent.parent);
-        }
-        function getSymbolDisplayBuilder() {
-            function getNameOfSymbol(symbol) {
-                if (symbol.declarations && symbol.declarations.length) {
-                    var declaration = symbol.declarations[0];
-                    if (declaration.name) {
-                        return ts.declarationNameToString(declaration.name);
-                    }
-                    switch (declaration.kind) {
-                        case 192:
-                            return "(Anonymous class)";
-                        case 179:
-                        case 180:
-                            return "(Anonymous function)";
-                    }
-                }
-                return symbol.name;
-            }
-            function appendSymbolNameOnly(symbol, writer) {
-                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
-            }
-            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
-                var symbolName = getNameOfSymbol(symbol);
-                var firstChar = symbolName.charCodeAt(0);
-                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
-                if (needsElementAccess) {
-                    writePunctuation(writer, 19);
-                    if (ts.isSingleOrDoubleQuote(firstChar)) {
-                        writer.writeStringLiteral(symbolName);
-                    }
-                    else {
-                        writer.writeSymbol(symbolName, symbol);
-                    }
-                    writePunctuation(writer, 20);
-                }
-                else {
-                    writePunctuation(writer, 21);
-                    writer.writeSymbol(symbolName, symbol);
-                }
-            }
-            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
-                var parentSymbol;
-                function appendParentTypeArgumentsAndSymbolName(symbol) {
-                    if (parentSymbol) {
-                        if (flags & 1) {
-                            if (symbol.flags & 16777216) {
-                                buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration);
-                            }
-                            else {
-                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
-                            }
-                        }
-                        appendPropertyOrElementAccessForSymbol(symbol, writer);
-                    }
-                    else {
-                        appendSymbolNameOnly(symbol, writer);
-                    }
-                    parentSymbol = symbol;
-                }
-                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
-                function walkSymbol(symbol, meaning) {
-                    if (symbol) {
-                        var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2));
-                        if (!accessibleSymbolChain ||
-                            needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
-                            walkSymbol(getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol), getQualifiedLeftMeaning(meaning));
-                        }
-                        if (accessibleSymbolChain) {
-                            for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
-                                var accessibleSymbol = accessibleSymbolChain_1[_i];
-                                appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
-                            }
-                        }
-                        else {
-                            if (!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) {
-                                return;
-                            }
-                            if (symbol.flags & 2048 || symbol.flags & 4096) {
-                                return;
-                            }
-                            appendParentTypeArgumentsAndSymbolName(symbol);
-                        }
-                    }
-                }
-                var isTypeParameter = symbol.flags & 262144;
-                var typeFormatFlag = 128 & typeFlags;
-                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
-                    walkSymbol(symbol, meaning);
-                    return;
-                }
-                return appendParentTypeArgumentsAndSymbolName(symbol);
-            }
-            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
-                var globalFlagsToPass = globalFlags & 16;
-                var inObjectTypeLiteral = false;
-                return writeType(type, globalFlags);
-                function writeType(type, flags) {
-                    if (type.flags & 150995071) {
-                        writer.writeKeyword(!(globalFlags & 16) && isTypeAny(type)
-                            ? "any"
-                            : type.intrinsicName);
-                    }
-                    else if (type.flags & 33554432) {
-                        if (inObjectTypeLiteral) {
-                            writer.reportInaccessibleThisError();
-                        }
-                        writer.writeKeyword("this");
-                    }
-                    else if (type.flags & 4096) {
-                        writeTypeReference(type, flags);
-                    }
-                    else if (type.flags & (1024 | 2048 | 128 | 512)) {
-                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793056, 0, flags);
-                    }
-                    else if (type.flags & 8192) {
-                        writeTupleType(type);
-                    }
-                    else if (type.flags & 49152) {
-                        writeUnionOrIntersectionType(type, flags);
-                    }
-                    else if (type.flags & 65536) {
-                        writeAnonymousType(type, flags);
-                    }
-                    else if (type.flags & 256) {
-                        writer.writeStringLiteral("\"" + ts.escapeString(type.text) + "\"");
-                    }
-                    else {
-                        writePunctuation(writer, 15);
-                        writeSpace(writer);
-                        writePunctuation(writer, 22);
-                        writeSpace(writer);
-                        writePunctuation(writer, 16);
-                    }
-                }
-                function writeTypeList(types, delimiter) {
-                    for (var i = 0; i < types.length; i++) {
-                        if (i > 0) {
-                            if (delimiter !== 24) {
-                                writeSpace(writer);
-                            }
-                            writePunctuation(writer, delimiter);
-                            writeSpace(writer);
-                        }
-                        writeType(types[i], delimiter === 24 ? 0 : 64);
-                    }
-                }
-                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
-                    if (symbol.flags & 32 || !isReservedMemberName(symbol.name)) {
-                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793056, 0, flags);
-                    }
-                    if (pos < end) {
-                        writePunctuation(writer, 25);
-                        writeType(typeArguments[pos], 256);
-                        pos++;
-                        while (pos < end) {
-                            writePunctuation(writer, 24);
-                            writeSpace(writer);
-                            writeType(typeArguments[pos], 0);
-                            pos++;
-                        }
-                        writePunctuation(writer, 27);
-                    }
-                }
-                function writeTypeReference(type, flags) {
-                    var typeArguments = type.typeArguments || emptyArray;
-                    if (type.target === globalArrayType && !(flags & 1)) {
-                        writeType(typeArguments[0], 64);
-                        writePunctuation(writer, 19);
-                        writePunctuation(writer, 20);
-                    }
-                    else {
-                        var outerTypeParameters = type.target.outerTypeParameters;
-                        var i = 0;
-                        if (outerTypeParameters) {
-                            var length_1 = outerTypeParameters.length;
-                            while (i < length_1) {
-                                var start = i;
-                                var parent_6 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
-                                do {
-                                    i++;
-                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_6);
-                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
-                                    writeSymbolTypeReference(parent_6, typeArguments, start, i, flags);
-                                    writePunctuation(writer, 21);
-                                }
-                            }
-                        }
-                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
-                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
-                    }
-                }
-                function writeTupleType(type) {
-                    writePunctuation(writer, 19);
-                    writeTypeList(type.elementTypes, 24);
-                    writePunctuation(writer, 20);
-                }
-                function writeUnionOrIntersectionType(type, flags) {
-                    if (flags & 64) {
-                        writePunctuation(writer, 17);
-                    }
-                    writeTypeList(type.types, type.flags & 16384 ? 47 : 46);
-                    if (flags & 64) {
-                        writePunctuation(writer, 18);
-                    }
-                }
-                function writeAnonymousType(type, flags) {
-                    var symbol = type.symbol;
-                    if (symbol) {
-                        if (symbol.flags & (32 | 384 | 512)) {
-                            writeTypeOfSymbol(type, flags);
-                        }
-                        else if (shouldWriteTypeOfFunctionSymbol()) {
-                            writeTypeOfSymbol(type, flags);
-                        }
-                        else if (ts.contains(symbolStack, symbol)) {
-                            var typeAlias = getTypeAliasForTypeLiteral(type);
-                            if (typeAlias) {
-                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793056, 0, flags);
-                            }
-                            else {
-                                writeKeyword(writer, 117);
-                            }
-                        }
-                        else {
-                            if (!symbolStack) {
-                                symbolStack = [];
-                            }
-                            symbolStack.push(symbol);
-                            writeLiteralType(type, flags);
-                            symbolStack.pop();
-                        }
-                    }
-                    else {
-                        writeLiteralType(type, flags);
-                    }
-                    function shouldWriteTypeOfFunctionSymbol() {
-                        var isStaticMethodSymbol = !!(symbol.flags & 8192 &&
-                            ts.forEach(symbol.declarations, function (declaration) { return declaration.flags & 32; }));
-                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16) &&
-                            (symbol.parent ||
-                                ts.forEach(symbol.declarations, function (declaration) {
-                                    return declaration.parent.kind === 256 || declaration.parent.kind === 226;
-                                }));
-                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
-                            return !!(flags & 2) ||
-                                (ts.contains(symbolStack, symbol));
-                        }
-                    }
-                }
-                function writeTypeOfSymbol(type, typeFormatFlags) {
-                    writeKeyword(writer, 101);
-                    writeSpace(writer);
-                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455, 0, typeFormatFlags);
-                }
-                function writeIndexSignature(info, keyword) {
-                    if (info) {
-                        if (info.isReadonly) {
-                            writeKeyword(writer, 128);
-                            writeSpace(writer);
-                        }
-                        writePunctuation(writer, 19);
-                        writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
-                        writePunctuation(writer, 54);
-                        writeSpace(writer);
-                        writeKeyword(writer, keyword);
-                        writePunctuation(writer, 20);
-                        writePunctuation(writer, 54);
-                        writeSpace(writer);
-                        writeType(info.type, 0);
-                        writePunctuation(writer, 23);
-                        writer.writeLine();
-                    }
-                }
-                function writePropertyWithModifiers(prop) {
-                    if (isReadonlySymbol(prop)) {
-                        writeKeyword(writer, 128);
-                        writeSpace(writer);
-                    }
-                    buildSymbolDisplay(prop, writer);
-                    if (prop.flags & 536870912) {
-                        writePunctuation(writer, 53);
-                    }
-                }
-                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
-                    if (flags & 64) {
-                        return true;
-                    }
-                    else if (flags & 256) {
-                        var typeParameters = callSignature.target && (flags & 32) ?
-                            callSignature.target.typeParameters : callSignature.typeParameters;
-                        return typeParameters && typeParameters.length !== 0;
-                    }
-                    return false;
-                }
-                function writeLiteralType(type, flags) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
-                            writePunctuation(writer, 15);
-                            writePunctuation(writer, 16);
-                            return;
-                        }
-                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
-                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 17);
-                            }
-                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8, undefined, symbolStack);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 18);
-                            }
-                            return;
-                        }
-                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
-                            if (flags & 64) {
-                                writePunctuation(writer, 17);
-                            }
-                            writeKeyword(writer, 92);
-                            writeSpace(writer);
-                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8, undefined, symbolStack);
-                            if (flags & 64) {
-                                writePunctuation(writer, 18);
-                            }
-                            return;
-                        }
-                    }
-                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
-                    inObjectTypeLiteral = true;
-                    writePunctuation(writer, 15);
-                    writer.writeLine();
-                    writer.increaseIndent();
-                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
-                        var signature = _a[_i];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, undefined, symbolStack);
-                        writePunctuation(writer, 23);
-                        writer.writeLine();
-                    }
-                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
-                        var signature = _c[_b];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1, symbolStack);
-                        writePunctuation(writer, 23);
-                        writer.writeLine();
-                    }
-                    writeIndexSignature(resolved.stringIndexInfo, 132);
-                    writeIndexSignature(resolved.numberIndexInfo, 130);
-                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
-                        var p = _e[_d];
-                        var t = getTypeOfSymbol(p);
-                        if (p.flags & (16 | 8192) && !getPropertiesOfObjectType(t).length) {
-                            var signatures = getSignaturesOfType(t, 0);
-                            for (var _f = 0, signatures_1 = signatures; _f < signatures_1.length; _f++) {
-                                var signature = signatures_1[_f];
-                                writePropertyWithModifiers(p);
-                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, undefined, symbolStack);
-                                writePunctuation(writer, 23);
-                                writer.writeLine();
-                            }
-                        }
-                        else {
-                            writePropertyWithModifiers(p);
-                            writePunctuation(writer, 54);
-                            writeSpace(writer);
-                            writeType(t, 0);
-                            writePunctuation(writer, 23);
-                            writer.writeLine();
-                        }
-                    }
-                    writer.decreaseIndent();
-                    writePunctuation(writer, 16);
-                    inObjectTypeLiteral = saveInObjectTypeLiteral;
-                }
-            }
-            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
-                var targetSymbol = getTargetSymbol(symbol);
-                if (targetSymbol.flags & 32 || targetSymbol.flags & 64 || targetSymbol.flags & 524288) {
-                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
-                }
-            }
-            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
-                appendSymbolNameOnly(tp.symbol, writer);
-                var constraint = getConstraintOfTypeParameter(tp);
-                if (constraint) {
-                    writeSpace(writer);
-                    writeKeyword(writer, 83);
-                    writeSpace(writer);
-                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
-                }
-            }
-            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
-                var parameterNode = p.valueDeclaration;
-                if (ts.isRestParameter(parameterNode)) {
-                    writePunctuation(writer, 22);
-                }
-                if (ts.isBindingPattern(parameterNode.name)) {
-                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    appendSymbolNameOnly(p, writer);
-                }
-                if (isOptionalParameter(parameterNode)) {
-                    writePunctuation(writer, 53);
-                }
-                writePunctuation(writer, 54);
-                writeSpace(writer);
-                buildTypeDisplay(getTypeOfSymbol(p), writer, enclosingDeclaration, flags, symbolStack);
-            }
-            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
-                if (bindingPattern.kind === 167) {
-                    writePunctuation(writer, 15);
-                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 16);
-                }
-                else if (bindingPattern.kind === 168) {
-                    writePunctuation(writer, 19);
-                    var elements = bindingPattern.elements;
-                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    if (elements && elements.hasTrailingComma) {
-                        writePunctuation(writer, 24);
-                    }
-                    writePunctuation(writer, 20);
-                }
-            }
-            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
-                if (bindingElement.kind === 193) {
-                    return;
-                }
-                ts.Debug.assert(bindingElement.kind === 169);
-                if (bindingElement.propertyName) {
-                    writer.writeSymbol(ts.getTextOfNode(bindingElement.propertyName), bindingElement.symbol);
-                    writePunctuation(writer, 54);
-                    writeSpace(writer);
-                }
-                if (ts.isBindingPattern(bindingElement.name)) {
-                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    if (bindingElement.dotDotDotToken) {
-                        writePunctuation(writer, 22);
-                    }
-                    appendSymbolNameOnly(bindingElement.symbol, writer);
-                }
-            }
-            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25);
-                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 27);
-                }
-            }
-            function buildDisplayForCommaSeparatedList(list, writer, action) {
-                for (var i = 0; i < list.length; i++) {
-                    if (i > 0) {
-                        writePunctuation(writer, 24);
-                        writeSpace(writer);
-                    }
-                    action(list[i]);
-                }
-            }
-            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25);
-                    var flags_1 = 256;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (i > 0) {
-                            writePunctuation(writer, 24);
-                            writeSpace(writer);
-                            flags_1 = 0;
-                        }
-                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags_1);
-                    }
-                    writePunctuation(writer, 27);
-                }
-            }
-            function buildDisplayForParametersAndDelimiters(thisType, parameters, writer, enclosingDeclaration, flags, symbolStack) {
-                writePunctuation(writer, 17);
-                if (thisType) {
-                    writeKeyword(writer, 97);
-                    writePunctuation(writer, 54);
-                    writeSpace(writer);
-                    buildTypeDisplay(thisType, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                for (var i = 0; i < parameters.length; i++) {
-                    if (i > 0 || thisType) {
-                        writePunctuation(writer, 24);
-                        writeSpace(writer);
-                    }
-                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
-                }
-                writePunctuation(writer, 18);
-            }
-            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    writer.writeParameter(predicate.parameterName);
-                }
-                else {
-                    writeKeyword(writer, 97);
-                }
-                writeSpace(writer);
-                writeKeyword(writer, 124);
-                writeSpace(writer);
-                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
-            }
-            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
-                if (flags & 8) {
-                    writeSpace(writer);
-                    writePunctuation(writer, 34);
-                }
-                else {
-                    writePunctuation(writer, 54);
-                }
-                writeSpace(writer);
-                if (signature.typePredicate) {
-                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    var returnType = getReturnTypeOfSignature(signature);
-                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
-                }
-            }
-            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
-                if (kind === 1) {
-                    writeKeyword(writer, 92);
-                    writeSpace(writer);
-                }
-                if (signature.target && (flags & 32)) {
-                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
-                }
-                else {
-                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                buildDisplayForParametersAndDelimiters(signature.thisType, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
-                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
-            }
-            return _displayBuilder || (_displayBuilder = {
-                buildSymbolDisplay: buildSymbolDisplay,
-                buildTypeDisplay: buildTypeDisplay,
-                buildTypeParameterDisplay: buildTypeParameterDisplay,
-                buildTypePredicateDisplay: buildTypePredicateDisplay,
-                buildParameterDisplay: buildParameterDisplay,
-                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
-                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
-                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
-                buildSignatureDisplay: buildSignatureDisplay,
-                buildReturnTypeDisplay: buildReturnTypeDisplay
-            });
-        }
-        function isDeclarationVisible(node) {
-            if (node) {
-                var links = getNodeLinks(node);
-                if (links.isVisible === undefined) {
-                    links.isVisible = !!determineIfDeclarationIsVisible();
-                }
-                return links.isVisible;
-            }
-            return false;
-            function determineIfDeclarationIsVisible() {
-                switch (node.kind) {
-                    case 169:
-                        return isDeclarationVisible(node.parent.parent);
-                    case 218:
-                        if (ts.isBindingPattern(node.name) &&
-                            !node.name.elements.length) {
-                            return false;
-                        }
-                    case 225:
-                    case 221:
-                    case 222:
-                    case 223:
-                    case 220:
-                    case 224:
-                    case 229:
-                        if (ts.isExternalModuleAugmentation(node)) {
-                            return true;
-                        }
-                        var parent_7 = getDeclarationContainer(node);
-                        if (!(ts.getCombinedNodeFlags(node) & 1) &&
-                            !(node.kind !== 229 && parent_7.kind !== 256 && ts.isInAmbientContext(parent_7))) {
-                            return isGlobalSourceFile(parent_7);
-                        }
-                        return isDeclarationVisible(parent_7);
-                    case 145:
-                    case 144:
-                    case 149:
-                    case 150:
-                    case 147:
-                    case 146:
-                        if (node.flags & (8 | 16)) {
-                            return false;
-                        }
-                    case 148:
-                    case 152:
-                    case 151:
-                    case 153:
-                    case 142:
-                    case 226:
-                    case 156:
-                    case 157:
-                    case 159:
-                    case 155:
-                    case 160:
-                    case 161:
-                    case 162:
-                    case 163:
-                    case 164:
-                        return isDeclarationVisible(node.parent);
-                    case 231:
-                    case 232:
-                    case 234:
-                        return false;
-                    case 141:
-                    case 256:
-                        return true;
-                    case 235:
-                        return false;
-                    default:
-                        return false;
-                }
-            }
-        }
-        function collectLinkedAliases(node) {
-            var exportSymbol;
-            if (node.parent && node.parent.kind === 235) {
-                exportSymbol = resolveName(node.parent, node.text, 107455 | 793056 | 1536 | 8388608, ts.Diagnostics.Cannot_find_name_0, node);
-            }
-            else if (node.parent.kind === 238) {
-                var exportSpecifier = node.parent;
-                exportSymbol = exportSpecifier.parent.parent.moduleSpecifier ?
-                    getExternalModuleMember(exportSpecifier.parent.parent, exportSpecifier) :
-                    resolveEntityName(exportSpecifier.propertyName || exportSpecifier.name, 107455 | 793056 | 1536 | 8388608);
-            }
-            var result = [];
-            if (exportSymbol) {
-                buildVisibleNodeList(exportSymbol.declarations);
-            }
-            return result;
-            function buildVisibleNodeList(declarations) {
-                ts.forEach(declarations, function (declaration) {
-                    getNodeLinks(declaration).isVisible = true;
-                    var resultNode = getAnyImportSyntax(declaration) || declaration;
-                    if (!ts.contains(result, resultNode)) {
-                        result.push(resultNode);
-                    }
-                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
-                        var internalModuleReference = declaration.moduleReference;
-                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
-                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 | 793056 | 1536, undefined, undefined);
-                        if (importSymbol) {
-                            buildVisibleNodeList(importSymbol.declarations);
-                        }
-                    }
-                });
-            }
-        }
-        function pushTypeResolution(target, propertyName) {
-            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
-            if (resolutionCycleStartIndex >= 0) {
-                var length_2 = resolutionTargets.length;
-                for (var i = resolutionCycleStartIndex; i < length_2; i++) {
-                    resolutionResults[i] = false;
-                }
-                return false;
-            }
-            resolutionTargets.push(target);
-            resolutionResults.push(true);
-            resolutionPropertyNames.push(propertyName);
-            return true;
-        }
-        function findResolutionCycleStartIndex(target, propertyName) {
-            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
-                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
-                    return -1;
-                }
-                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
-                    return i;
-                }
-            }
-            return -1;
-        }
-        function hasType(target, propertyName) {
-            if (propertyName === 0) {
-                return getSymbolLinks(target).type;
-            }
-            if (propertyName === 2) {
-                return getSymbolLinks(target).declaredType;
-            }
-            if (propertyName === 1) {
-                ts.Debug.assert(!!(target.flags & 1024));
-                return target.resolvedBaseConstructorType;
-            }
-            if (propertyName === 3) {
-                return target.resolvedReturnType;
-            }
-            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
-        }
-        function popTypeResolution() {
-            resolutionTargets.pop();
-            resolutionPropertyNames.pop();
-            return resolutionResults.pop();
-        }
-        function getDeclarationContainer(node) {
-            node = ts.getRootDeclaration(node);
-            while (node) {
-                switch (node.kind) {
-                    case 218:
-                    case 219:
-                    case 234:
-                    case 233:
-                    case 232:
-                    case 231:
-                        node = node.parent;
-                        break;
-                    default:
-                        return node.parent;
-                }
-            }
-        }
-        function getTypeOfPrototypeProperty(prototype) {
-            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
-            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
-        }
-        function getTypeOfPropertyOfType(type, name) {
-            var prop = getPropertyOfType(type, name);
-            return prop ? getTypeOfSymbol(prop) : undefined;
-        }
-        function isTypeAny(type) {
-            return type && (type.flags & 1) !== 0;
-        }
-        function getTypeForBindingElementParent(node) {
-            var symbol = getSymbolOfNode(node);
-            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, false);
-        }
-        function getTextOfPropertyName(name) {
-            switch (name.kind) {
-                case 69:
-                    return name.text;
-                case 9:
-                case 8:
-                    return name.text;
-                case 140:
-                    if (ts.isStringOrNumericLiteral(name.expression.kind)) {
-                        return name.expression.text;
-                    }
-            }
-            return undefined;
-        }
-        function isComputedNonLiteralName(name) {
-            return name.kind === 140 && !ts.isStringOrNumericLiteral(name.expression.kind);
-        }
-        function getTypeForBindingElement(declaration) {
-            var pattern = declaration.parent;
-            var parentType = getTypeForBindingElementParent(pattern.parent);
-            if (parentType === unknownType) {
-                return unknownType;
-            }
-            if (!parentType || isTypeAny(parentType)) {
-                if (declaration.initializer) {
-                    return checkExpressionCached(declaration.initializer);
-                }
-                return parentType;
-            }
-            var type;
-            if (pattern.kind === 167) {
-                var name_10 = declaration.propertyName || declaration.name;
-                if (isComputedNonLiteralName(name_10)) {
-                    return anyType;
-                }
-                if (declaration.initializer) {
-                    getContextualType(declaration.initializer);
-                }
-                var text = getTextOfPropertyName(name_10);
-                type = getTypeOfPropertyOfType(parentType, text) ||
-                    isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1) ||
-                    getIndexTypeOfType(parentType, 0);
-                if (!type) {
-                    error(name_10, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_10));
-                    return unknownType;
-                }
-            }
-            else {
-                var elementType = checkIteratedTypeOrElementType(parentType, pattern, false);
-                if (!declaration.dotDotDotToken) {
-                    var propName = "" + ts.indexOf(pattern.elements, declaration);
-                    type = isTupleLikeType(parentType)
-                        ? getTypeOfPropertyOfType(parentType, propName)
-                        : elementType;
-                    if (!type) {
-                        if (isTupleType(parentType)) {
-                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), parentType.elementTypes.length, pattern.elements.length);
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
-                        }
-                        return unknownType;
-                    }
-                }
-                else {
-                    type = createArrayType(elementType);
-                }
-            }
-            if (strictNullChecks && declaration.initializer && !(getNullableKind(checkExpressionCached(declaration.initializer)) & 32)) {
-                type = getTypeWithFacts(type, 131072);
-            }
-            return type;
-        }
-        function getTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            var jsDocType = getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-            if (jsDocType) {
-                return getTypeFromTypeNode(jsDocType);
-            }
-        }
-        function getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            var typeTag = ts.getJSDocTypeTag(declaration);
-            if (typeTag && typeTag.typeExpression) {
-                return typeTag.typeExpression.type;
-            }
-            if (declaration.kind === 218 &&
-                declaration.parent.kind === 219 &&
-                declaration.parent.parent.kind === 200) {
-                var annotation = ts.getJSDocTypeTag(declaration.parent.parent);
-                if (annotation && annotation.typeExpression) {
-                    return annotation.typeExpression.type;
-                }
-            }
-            else if (declaration.kind === 142) {
-                var paramTag = ts.getCorrespondingJSDocParameterTag(declaration);
-                if (paramTag && paramTag.typeExpression) {
-                    return paramTag.typeExpression.type;
-                }
-            }
-            return undefined;
-        }
-        function addOptionality(type, optional) {
-            return strictNullChecks && optional ? addNullableKind(type, 32) : type;
-        }
-        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
-            if (declaration.flags & 134217728) {
-                var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            if (declaration.parent.parent.kind === 207) {
-                return stringType;
-            }
-            if (declaration.parent.parent.kind === 208) {
-                return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType;
-            }
-            if (ts.isBindingPattern(declaration.parent)) {
-                return getTypeForBindingElement(declaration);
-            }
-            if (declaration.type) {
-                return addOptionality(getTypeFromTypeNode(declaration.type), declaration.questionToken && includeOptionality);
-            }
-            if (declaration.kind === 142) {
-                var func = declaration.parent;
-                if (func.kind === 150 && !ts.hasDynamicName(func)) {
-                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149);
-                    if (getter) {
-                        var signature = getSignatureFromDeclaration(getter);
-                        var thisParameter = getAccessorThisParameter(func);
-                        if (thisParameter && declaration === thisParameter) {
-                            return signature.thisType;
-                        }
-                        return getReturnTypeOfSignature(signature);
-                    }
-                }
-                var type = declaration.symbol.name === "this"
-                    ? getContextuallyTypedThisType(func)
-                    : getContextuallyTypedParameterType(declaration);
-                if (type) {
-                    return addOptionality(type, declaration.questionToken && includeOptionality);
-                }
-            }
-            if (declaration.initializer) {
-                return addOptionality(checkExpressionCached(declaration.initializer), declaration.questionToken && includeOptionality);
-            }
-            if (declaration.kind === 254) {
-                return checkIdentifier(declaration.name);
-            }
-            if (ts.isBindingPattern(declaration.name)) {
-                return getTypeFromBindingPattern(declaration.name, false);
-            }
-            return undefined;
-        }
-        function getTypeFromBindingElement(element, includePatternInType) {
-            if (element.initializer) {
-                var type = checkExpressionCached(element.initializer);
-                reportErrorsFromWidening(element, type);
-                return getWidenedType(type);
-            }
-            if (ts.isBindingPattern(element.name)) {
-                return getTypeFromBindingPattern(element.name, includePatternInType);
-            }
-            if (compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
-                reportImplicitAnyError(element, anyType);
-            }
-            return anyType;
-        }
-        function getTypeFromObjectBindingPattern(pattern, includePatternInType) {
-            var members = {};
-            var hasComputedProperties = false;
-            ts.forEach(pattern.elements, function (e) {
-                var name = e.propertyName || e.name;
-                if (isComputedNonLiteralName(name)) {
-                    hasComputedProperties = true;
-                    return;
-                }
-                var text = getTextOfPropertyName(name);
-                var flags = 4 | 67108864 | (e.initializer ? 536870912 : 0);
-                var symbol = createSymbol(flags, text);
-                symbol.type = getTypeFromBindingElement(e, includePatternInType);
-                symbol.bindingElement = e;
-                members[symbol.name] = symbol;
-            });
-            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined);
-            if (includePatternInType) {
-                result.pattern = pattern;
-            }
-            if (hasComputedProperties) {
-                result.flags |= 67108864;
-            }
-            return result;
-        }
-        function getTypeFromArrayBindingPattern(pattern, includePatternInType) {
-            var elements = pattern.elements;
-            if (elements.length === 0 || elements[elements.length - 1].dotDotDotToken) {
-                return languageVersion >= 2 ? createIterableType(anyType) : anyArrayType;
-            }
-            var elementTypes = ts.map(elements, function (e) { return e.kind === 193 ? anyType : getTypeFromBindingElement(e, includePatternInType); });
-            if (includePatternInType) {
-                var result = createNewTupleType(elementTypes);
-                result.pattern = pattern;
-                return result;
-            }
-            return createTupleType(elementTypes);
-        }
-        function getTypeFromBindingPattern(pattern, includePatternInType) {
-            return pattern.kind === 167
-                ? getTypeFromObjectBindingPattern(pattern, includePatternInType)
-                : getTypeFromArrayBindingPattern(pattern, includePatternInType);
-        }
-        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
-            var type = getTypeForVariableLikeDeclaration(declaration, true);
-            if (type) {
-                if (reportErrors) {
-                    reportErrorsFromWidening(declaration, type);
-                }
-                if (declaration.kind === 253) {
-                    return type;
-                }
-                return getWidenedType(type);
-            }
-            type = declaration.dotDotDotToken ? anyArrayType : anyType;
-            if (reportErrors && compilerOptions.noImplicitAny) {
-                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
-                    reportImplicitAnyError(declaration, type);
-                }
-            }
-            return type;
-        }
-        function declarationBelongsToPrivateAmbientMember(declaration) {
-            var root = ts.getRootDeclaration(declaration);
-            var memberDeclaration = root.kind === 142 ? root.parent : root;
-            return isPrivateWithinAmbient(memberDeclaration);
-        }
-        function getTypeOfVariableOrParameterOrProperty(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                if (symbol.flags & 134217728) {
-                    return links.type = getTypeOfPrototypeProperty(symbol);
-                }
-                var declaration = symbol.valueDeclaration;
-                if (declaration.parent.kind === 252) {
-                    return links.type = anyType;
-                }
-                if (declaration.kind === 235) {
-                    return links.type = checkExpression(declaration.expression);
-                }
-                if (declaration.kind === 187) {
-                    return links.type = getUnionType(ts.map(symbol.declarations, function (decl) { return checkExpressionCached(decl.right); }));
-                }
-                if (declaration.kind === 172) {
-                    if (declaration.parent.kind === 187) {
-                        return links.type = checkExpressionCached(declaration.parent.right);
-                    }
-                }
-                if (!pushTypeResolution(symbol, 0)) {
-                    return unknownType;
-                }
-                var type = getWidenedTypeForVariableLikeDeclaration(declaration, true);
-                if (!popTypeResolution()) {
-                    if (symbol.valueDeclaration.type) {
-                        type = unknownType;
-                        error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
-                    }
-                    else {
-                        type = anyType;
-                        if (compilerOptions.noImplicitAny) {
-                            error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
-                        }
-                    }
-                }
-                links.type = type;
-            }
-            return links.type;
-        }
-        function getAnnotatedAccessorType(accessor) {
-            if (accessor) {
-                if (accessor.kind === 149) {
-                    return accessor.type && getTypeFromTypeNode(accessor.type);
-                }
-                else {
-                    var setterTypeAnnotation = ts.getSetAccessorTypeAnnotationNode(accessor);
-                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
-                }
-            }
-            return undefined;
-        }
-        function getAnnotatedAccessorThisType(accessor) {
-            if (accessor) {
-                var parameter = getAccessorThisParameter(accessor);
-                if (parameter && parameter.type) {
-                    return getTypeFromTypeNode(accessor.parameters[0].type);
-                }
-            }
-            return undefined;
-        }
-        function getTypeOfAccessors(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var getter = ts.getDeclarationOfKind(symbol, 149);
-                var setter = ts.getDeclarationOfKind(symbol, 150);
-                if (getter && getter.flags & 134217728) {
-                    var jsDocType = getTypeForVariableLikeDeclarationFromJSDocComment(getter);
-                    if (jsDocType) {
-                        return links.type = jsDocType;
-                    }
-                }
-                if (!pushTypeResolution(symbol, 0)) {
-                    return unknownType;
-                }
-                var type = void 0;
-                var getterReturnType = getAnnotatedAccessorType(getter);
-                if (getterReturnType) {
-                    type = getterReturnType;
-                }
-                else {
-                    var setterParameterType = getAnnotatedAccessorType(setter);
-                    if (setterParameterType) {
-                        type = setterParameterType;
-                    }
-                    else {
-                        if (getter && getter.body) {
-                            type = getReturnTypeFromBody(getter);
-                        }
-                        else {
-                            if (compilerOptions.noImplicitAny) {
-                                error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation, symbolToString(symbol));
-                            }
-                            type = anyType;
-                        }
-                    }
-                }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var getter_1 = ts.getDeclarationOfKind(symbol, 149);
-                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
-                    }
-                }
-                links.type = type;
-            }
-            return links.type;
-        }
-        function getTypeOfFuncClassEnumModule(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var type = createObjectType(65536, symbol);
-                links.type = strictNullChecks && symbol.flags & 536870912 ?
-                    addNullableKind(type, 32) : type;
-            }
-            return links.type;
-        }
-        function getTypeOfEnumMember(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
-            }
-            return links.type;
-        }
-        function getTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var targetSymbol = resolveAlias(symbol);
-                links.type = targetSymbol.flags & 107455
-                    ? getTypeOfSymbol(targetSymbol)
-                    : unknownType;
-            }
-            return links.type;
-        }
-        function getTypeOfInstantiatedSymbol(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
-            }
-            return links.type;
-        }
-        function getTypeOfSymbol(symbol) {
-            if (symbol.flags & 16777216) {
-                return getTypeOfInstantiatedSymbol(symbol);
-            }
-            if (symbol.flags & (3 | 4)) {
-                return getTypeOfVariableOrParameterOrProperty(symbol);
-            }
-            if (symbol.flags & (16 | 8192 | 32 | 384 | 512)) {
-                return getTypeOfFuncClassEnumModule(symbol);
-            }
-            if (symbol.flags & 8) {
-                return getTypeOfEnumMember(symbol);
-            }
-            if (symbol.flags & 98304) {
-                return getTypeOfAccessors(symbol);
-            }
-            if (symbol.flags & 8388608) {
-                return getTypeOfAlias(symbol);
-            }
-            return unknownType;
-        }
-        function getTargetType(type) {
-            return type.flags & 4096 ? type.target : type;
-        }
-        function hasBaseType(type, checkBase) {
-            return check(type);
-            function check(type) {
-                var target = getTargetType(type);
-                return target === checkBase || ts.forEach(getBaseTypes(target), check);
-            }
-        }
-        function appendTypeParameters(typeParameters, declarations) {
-            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
-                var declaration = declarations_2[_i];
-                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
-                if (!typeParameters) {
-                    typeParameters = [tp];
-                }
-                else if (!ts.contains(typeParameters, tp)) {
-                    typeParameters.push(tp);
-                }
-            }
-            return typeParameters;
-        }
-        function appendOuterTypeParameters(typeParameters, node) {
-            while (true) {
-                node = node.parent;
-                if (!node) {
-                    return typeParameters;
-                }
-                if (node.kind === 221 || node.kind === 192 ||
-                    node.kind === 220 || node.kind === 179 ||
-                    node.kind === 147 || node.kind === 180) {
-                    var declarations = node.typeParameters;
-                    if (declarations) {
-                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
-                    }
-                }
-            }
-        }
-        function getOuterTypeParametersOfClassOrInterface(symbol) {
-            var declaration = symbol.flags & 32 ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222);
-            return appendOuterTypeParameters(undefined, declaration);
-        }
-        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
-            var result;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var node = _a[_i];
-                if (node.kind === 222 || node.kind === 221 ||
-                    node.kind === 192 || node.kind === 223) {
-                    var declaration = node;
-                    if (declaration.typeParameters) {
-                        result = appendTypeParameters(result, declaration.typeParameters);
-                    }
-                }
-            }
-            return result;
-        }
-        function getTypeParametersOfClassOrInterface(symbol) {
-            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
-        }
-        function isConstructorType(type) {
-            return type.flags & 80896 && getSignaturesOfType(type, 1).length > 0;
-        }
-        function getBaseTypeNodeOfClass(type) {
-            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
-        }
-        function getConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var typeArgCount = typeArgumentNodes ? typeArgumentNodes.length : 0;
-            return ts.filter(getSignaturesOfType(type, 1), function (sig) { return (sig.typeParameters ? sig.typeParameters.length : 0) === typeArgCount; });
-        }
-        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes);
-            if (typeArgumentNodes) {
-                var typeArguments_1 = ts.map(typeArgumentNodes, getTypeFromTypeNode);
-                signatures = ts.map(signatures, function (sig) { return getSignatureInstantiation(sig, typeArguments_1); });
-            }
-            return signatures;
-        }
-        function getBaseConstructorTypeOfClass(type) {
-            if (!type.resolvedBaseConstructorType) {
-                var baseTypeNode = getBaseTypeNodeOfClass(type);
-                if (!baseTypeNode) {
-                    return type.resolvedBaseConstructorType = undefinedType;
-                }
-                if (!pushTypeResolution(type, 1)) {
-                    return unknownType;
-                }
-                var baseConstructorType = checkExpression(baseTypeNode.expression);
-                if (baseConstructorType.flags & 80896) {
-                    resolveStructuredTypeMembers(baseConstructorType);
-                }
-                if (!popTypeResolution()) {
-                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
-                    return type.resolvedBaseConstructorType = unknownType;
-                }
-                if (baseConstructorType !== unknownType && baseConstructorType !== nullType && !isConstructorType(baseConstructorType)) {
-                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
-                    return type.resolvedBaseConstructorType = unknownType;
-                }
-                type.resolvedBaseConstructorType = baseConstructorType;
-            }
-            return type.resolvedBaseConstructorType;
-        }
-        function getBaseTypes(type) {
-            var isClass = type.symbol.flags & 32;
-            var isInterface = type.symbol.flags & 64;
-            if (!type.resolvedBaseTypes) {
-                if (!isClass && !isInterface) {
-                    ts.Debug.fail("type must be class or interface");
-                }
-                if (isClass) {
-                    resolveBaseTypesOfClass(type);
-                }
-                if (isInterface) {
-                    resolveBaseTypesOfInterface(type);
-                }
-            }
-            return type.resolvedBaseTypes;
-        }
-        function resolveBaseTypesOfClass(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            var baseConstructorType = getBaseConstructorTypeOfClass(type);
-            if (!(baseConstructorType.flags & 80896)) {
-                return;
-            }
-            var baseTypeNode = getBaseTypeNodeOfClass(type);
-            var baseType;
-            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
-            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 &&
-                areAllOuterTypeParametersApplied(originalBaseType)) {
-                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol);
-            }
-            else {
-                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments);
-                if (!constructors.length) {
-                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
-                    return;
-                }
-                baseType = getReturnTypeOfSignature(constructors[0]);
-            }
-            if (baseType === unknownType) {
-                return;
-            }
-            if (!(getTargetType(baseType).flags & (1024 | 2048))) {
-                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
-                return;
-            }
-            if (type === baseType || hasBaseType(baseType, type)) {
-                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 1));
-                return;
-            }
-            if (type.resolvedBaseTypes === emptyArray) {
-                type.resolvedBaseTypes = [baseType];
-            }
-            else {
-                type.resolvedBaseTypes.push(baseType);
-            }
-        }
-        function areAllOuterTypeParametersApplied(type) {
-            var outerTypeParameters = type.outerTypeParameters;
-            if (outerTypeParameters) {
-                var last = outerTypeParameters.length - 1;
-                var typeArguments = type.typeArguments;
-                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
-            }
-            return true;
-        }
-        function resolveBaseTypesOfInterface(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222 && ts.getInterfaceBaseTypeNodes(declaration)) {
-                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
-                        var node = _c[_b];
-                        var baseType = getTypeFromTypeNode(node);
-                        if (baseType !== unknownType) {
-                            if (getTargetType(baseType).flags & (1024 | 2048)) {
-                                if (type !== baseType && !hasBaseType(baseType, type)) {
-                                    if (type.resolvedBaseTypes === emptyArray) {
-                                        type.resolvedBaseTypes = [baseType];
-                                    }
-                                    else {
-                                        type.resolvedBaseTypes.push(baseType);
-                                    }
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 1));
-                                }
-                            }
-                            else {
-                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        function isIndependentInterface(symbol) {
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222) {
-                    if (declaration.flags & 16384) {
-                        return false;
-                    }
-                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
-                    if (baseTypeNodes) {
-                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
-                            var node = baseTypeNodes_1[_b];
-                            if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                                var baseSymbol = resolveEntityName(node.expression, 793056, true);
-                                if (!baseSymbol || !(baseSymbol.flags & 64) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
-                                    return false;
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            return true;
-        }
-        function getDeclaredTypeOfClassOrInterface(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var kind = symbol.flags & 32 ? 1024 : 2048;
-                var type = links.declaredType = createObjectType(kind, symbol);
-                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
-                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                if (outerTypeParameters || localTypeParameters || kind === 1024 || !isIndependentInterface(symbol)) {
-                    type.flags |= 4096;
-                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
-                    type.outerTypeParameters = outerTypeParameters;
-                    type.localTypeParameters = localTypeParameters;
-                    type.instantiations = {};
-                    type.instantiations[getTypeListId(type.typeParameters)] = type;
-                    type.target = type;
-                    type.typeArguments = type.typeParameters;
-                    type.thisType = createType(512 | 33554432);
-                    type.thisType.symbol = symbol;
-                    type.thisType.constraint = type;
-                }
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfTypeAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                if (!pushTypeResolution(symbol, 2)) {
-                    return unknownType;
-                }
-                var declaration = ts.getDeclarationOfKind(symbol, 223);
-                var type = getTypeFromTypeNode(declaration.type);
-                if (popTypeResolution()) {
-                    links.typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                    if (links.typeParameters) {
-                        links.instantiations = {};
-                        links.instantiations[getTypeListId(links.typeParameters)] = type;
-                    }
-                }
-                else {
-                    type = unknownType;
-                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
-                }
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfEnum(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var type = createType(128);
-                type.symbol = symbol;
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfTypeParameter(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var type = createType(512);
-                type.symbol = symbol;
-                if (!ts.getDeclarationOfKind(symbol, 141).constraint) {
-                    type.constraint = noConstraintType;
-                }
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfSymbol(symbol) {
-            ts.Debug.assert((symbol.flags & 16777216) === 0);
-            if (symbol.flags & (32 | 64)) {
-                return getDeclaredTypeOfClassOrInterface(symbol);
-            }
-            if (symbol.flags & 524288) {
-                return getDeclaredTypeOfTypeAlias(symbol);
-            }
-            if (symbol.flags & 384) {
-                return getDeclaredTypeOfEnum(symbol);
-            }
-            if (symbol.flags & 262144) {
-                return getDeclaredTypeOfTypeParameter(symbol);
-            }
-            if (symbol.flags & 8388608) {
-                return getDeclaredTypeOfAlias(symbol);
-            }
-            return unknownType;
-        }
-        function isIndependentTypeReference(node) {
-            if (node.typeArguments) {
-                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
-                    var typeNode = _a[_i];
-                    if (!isIndependentType(typeNode)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        function isIndependentType(node) {
-            switch (node.kind) {
-                case 117:
-                case 132:
-                case 130:
-                case 120:
-                case 133:
-                case 103:
-                case 135:
-                case 93:
-                case 127:
-                case 166:
-                    return true;
-                case 160:
-                    return isIndependentType(node.elementType);
-                case 155:
-                    return isIndependentTypeReference(node);
-            }
-            return false;
-        }
-        function isIndependentVariableLikeDeclaration(node) {
-            return node.type && isIndependentType(node.type) || !node.type && !node.initializer;
-        }
-        function isIndependentFunctionLikeDeclaration(node) {
-            if (node.kind !== 148 && (!node.type || !isIndependentType(node.type))) {
-                return false;
-            }
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                if (!isIndependentVariableLikeDeclaration(parameter)) {
-                    return false;
-                }
-            }
-            return true;
-        }
-        function isIndependentMember(symbol) {
-            if (symbol.declarations && symbol.declarations.length === 1) {
-                var declaration = symbol.declarations[0];
-                if (declaration) {
-                    switch (declaration.kind) {
-                        case 145:
-                        case 144:
-                            return isIndependentVariableLikeDeclaration(declaration);
-                        case 147:
-                        case 146:
-                        case 148:
-                            return isIndependentFunctionLikeDeclaration(declaration);
-                    }
-                }
-            }
-            return false;
-        }
-        function createSymbolTable(symbols) {
-            var result = {};
-            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
-                var symbol = symbols_1[_i];
-                result[symbol.name] = symbol;
-            }
-            return result;
-        }
-        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
-            var result = {};
-            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
-                var symbol = symbols_2[_i];
-                result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper);
-            }
-            return result;
-        }
-        function addInheritedMembers(symbols, baseSymbols) {
-            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
-                var s = baseSymbols_1[_i];
-                if (!ts.hasProperty(symbols, s.name)) {
-                    symbols[s.name] = s;
-                }
-            }
-        }
-        function resolveDeclaredMembers(type) {
-            if (!type.declaredProperties) {
-                var symbol = type.symbol;
-                type.declaredProperties = getNamedMembers(symbol.members);
-                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members["__call"]);
-                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members["__new"]);
-                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
-                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
-            }
-            return type;
-        }
-        function getTypeWithThisArgument(type, thisArgument) {
-            if (type.flags & 4096) {
-                return createTypeReference(type.target, ts.concatenate(type.typeArguments, [thisArgument || type.target.thisType]));
-            }
-            return type;
-        }
-        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
-            var mapper = identityMapper;
-            var members = source.symbol.members;
-            var callSignatures = source.declaredCallSignatures;
-            var constructSignatures = source.declaredConstructSignatures;
-            var stringIndexInfo = source.declaredStringIndexInfo;
-            var numberIndexInfo = source.declaredNumberIndexInfo;
-            if (!ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
-                mapper = createTypeMapper(typeParameters, typeArguments);
-                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, typeParameters.length === 1);
-                callSignatures = instantiateList(source.declaredCallSignatures, mapper, instantiateSignature);
-                constructSignatures = instantiateList(source.declaredConstructSignatures, mapper, instantiateSignature);
-                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
-                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
-            }
-            var baseTypes = getBaseTypes(source);
-            if (baseTypes.length) {
-                if (members === source.symbol.members) {
-                    members = createSymbolTable(source.declaredProperties);
-                }
-                var thisArgument = ts.lastOrUndefined(typeArguments);
-                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
-                    var baseType = baseTypes_1[_i];
-                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
-                    addInheritedMembers(members, getPropertiesOfObjectType(instantiatedBaseType));
-                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0));
-                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1));
-                    stringIndexInfo = stringIndexInfo || getIndexInfoOfType(instantiatedBaseType, 0);
-                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1);
-                }
-            }
-            setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function resolveClassOrInterfaceMembers(type) {
-            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
-        }
-        function resolveTypeReferenceMembers(type) {
-            var source = resolveDeclaredMembers(type.target);
-            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
-            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
-                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
-            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
-        }
-        function createSignature(declaration, typeParameters, thisType, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasStringLiterals) {
-            var sig = new Signature(checker);
-            sig.declaration = declaration;
-            sig.typeParameters = typeParameters;
-            sig.parameters = parameters;
-            sig.thisType = thisType;
-            sig.resolvedReturnType = resolvedReturnType;
-            sig.typePredicate = typePredicate;
-            sig.minArgumentCount = minArgumentCount;
-            sig.hasRestParameter = hasRestParameter;
-            sig.hasStringLiterals = hasStringLiterals;
-            return sig;
-        }
-        function cloneSignature(sig) {
-            return createSignature(sig.declaration, sig.typeParameters, sig.thisType, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasStringLiterals);
-        }
-        function getDefaultConstructSignatures(classType) {
-            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-            var baseSignatures = getSignaturesOfType(baseConstructorType, 1);
-            if (baseSignatures.length === 0) {
-                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, undefined, 0, false, false)];
-            }
-            var baseTypeNode = getBaseTypeNodeOfClass(classType);
-            var typeArguments = ts.map(baseTypeNode.typeArguments, getTypeFromTypeNode);
-            var typeArgCount = typeArguments ? typeArguments.length : 0;
-            var result = [];
-            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
-                var baseSig = baseSignatures_1[_i];
-                var typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
-                if (typeParamCount === typeArgCount) {
-                    var sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
-                    sig.typeParameters = classType.localTypeParameters;
-                    sig.resolvedReturnType = classType;
-                    result.push(sig);
-                }
-            }
-            return result;
-        }
-        function createTupleTypeMemberSymbols(memberTypes) {
-            var members = {};
-            for (var i = 0; i < memberTypes.length; i++) {
-                var symbol = createSymbol(4 | 67108864, "" + i);
-                symbol.type = memberTypes[i];
-                members[i] = symbol;
-            }
-            return members;
-        }
-        function resolveTupleTypeMembers(type) {
-            var arrayElementType = getUnionType(type.elementTypes, true);
-            var arrayType = resolveStructuredTypeMembers(createTypeFromGenericGlobalType(globalArrayType, [arrayElementType, type]));
-            var members = createTupleTypeMemberSymbols(type.elementTypes);
-            addInheritedMembers(members, arrayType.properties);
-            setObjectTypeMembers(type, members, arrayType.callSignatures, arrayType.constructSignatures, arrayType.stringIndexInfo, arrayType.numberIndexInfo);
-        }
-        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
-            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
-                var s = signatureList_1[_i];
-                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
-                    return s;
-                }
-            }
-        }
-        function findMatchingSignatures(signatureLists, signature, listIndex) {
-            if (signature.typeParameters) {
-                if (listIndex > 0) {
-                    return undefined;
-                }
-                for (var i = 1; i < signatureLists.length; i++) {
-                    if (!findMatchingSignature(signatureLists[i], signature, false, false, false)) {
-                        return undefined;
-                    }
-                }
-                return [signature];
-            }
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, true, true, true);
-                if (!match) {
-                    return undefined;
-                }
-                if (!ts.contains(result, match)) {
-                    (result || (result = [])).push(match);
-                }
-            }
-            return result;
-        }
-        function getUnionSignatures(types, kind) {
-            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
-                    var signature = _a[_i];
-                    if (!result || !findMatchingSignature(result, signature, false, true, true)) {
-                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
-                        if (unionSignatures) {
-                            var s = signature;
-                            if (unionSignatures.length > 1) {
-                                s = cloneSignature(signature);
-                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisType; })) {
-                                    s.thisType = getUnionType(ts.map(unionSignatures, function (sig) { return sig.thisType || anyType; }));
-                                }
-                                s.resolvedReturnType = undefined;
-                                s.unionSignatures = unionSignatures;
-                            }
-                            (result || (result = [])).push(s);
-                        }
-                    }
-                }
-            }
-            return result || emptyArray;
-        }
-        function getUnionIndexInfo(types, kind) {
-            var indexTypes = [];
-            var isAnyReadonly = false;
-            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
-                var type = types_1[_i];
-                var indexInfo = getIndexInfoOfType(type, kind);
-                if (!indexInfo) {
-                    return undefined;
-                }
-                indexTypes.push(indexInfo.type);
-                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
-            }
-            return createIndexInfo(getUnionType(indexTypes), isAnyReadonly);
-        }
-        function resolveUnionTypeMembers(type) {
-            var callSignatures = getUnionSignatures(type.types, 0);
-            var constructSignatures = getUnionSignatures(type.types, 1);
-            var stringIndexInfo = getUnionIndexInfo(type.types, 0);
-            var numberIndexInfo = getUnionIndexInfo(type.types, 1);
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function intersectTypes(type1, type2) {
-            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
-        }
-        function intersectIndexInfos(info1, info2) {
-            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
-        }
-        function resolveIntersectionTypeMembers(type) {
-            var callSignatures = emptyArray;
-            var constructSignatures = emptyArray;
-            var stringIndexInfo = undefined;
-            var numberIndexInfo = undefined;
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0));
-                constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(t, 1));
-                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0));
-                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1));
-            }
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function resolveAnonymousTypeMembers(type) {
-            var symbol = type.symbol;
-            if (type.target) {
-                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, false);
-                var callSignatures = instantiateList(getSignaturesOfType(type.target, 0), type.mapper, instantiateSignature);
-                var constructSignatures = instantiateList(getSignaturesOfType(type.target, 1), type.mapper, instantiateSignature);
-                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0), type.mapper);
-                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1), type.mapper);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-            }
-            else if (symbol.flags & 2048) {
-                var members = symbol.members;
-                var callSignatures = getSignaturesOfSymbol(members["__call"]);
-                var constructSignatures = getSignaturesOfSymbol(members["__new"]);
-                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
-                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-            }
-            else {
-                var members = emptySymbols;
-                var constructSignatures = emptyArray;
-                if (symbol.flags & 1952) {
-                    members = getExportsOfSymbol(symbol);
-                }
-                if (symbol.flags & 32) {
-                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
-                    constructSignatures = getSignaturesOfSymbol(symbol.members["__constructor"]);
-                    if (!constructSignatures.length) {
-                        constructSignatures = getDefaultConstructSignatures(classType);
-                    }
-                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-                    if (baseConstructorType.flags & 80896) {
-                        members = createSymbolTable(getNamedMembers(members));
-                        addInheritedMembers(members, getPropertiesOfObjectType(baseConstructorType));
-                    }
-                }
-                var numberIndexInfo = symbol.flags & 384 ? enumNumberIndexInfo : undefined;
-                setObjectTypeMembers(type, members, emptyArray, constructSignatures, undefined, numberIndexInfo);
-                if (symbol.flags & (16 | 8192)) {
-                    type.callSignatures = getSignaturesOfSymbol(symbol);
-                }
-            }
-        }
-        function resolveStructuredTypeMembers(type) {
-            if (!type.members) {
-                if (type.flags & 4096) {
-                    resolveTypeReferenceMembers(type);
-                }
-                else if (type.flags & (1024 | 2048)) {
-                    resolveClassOrInterfaceMembers(type);
-                }
-                else if (type.flags & 65536) {
-                    resolveAnonymousTypeMembers(type);
-                }
-                else if (type.flags & 8192) {
-                    resolveTupleTypeMembers(type);
-                }
-                else if (type.flags & 16384) {
-                    resolveUnionTypeMembers(type);
-                }
-                else if (type.flags & 32768) {
-                    resolveIntersectionTypeMembers(type);
-                }
-            }
-            return type;
-        }
-        function getPropertiesOfObjectType(type) {
-            if (type.flags & 80896) {
-                return resolveStructuredTypeMembers(type).properties;
-            }
-            return emptyArray;
-        }
-        function getPropertyOfObjectType(type, name) {
-            if (type.flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (ts.hasProperty(resolved.members, name)) {
-                    var symbol = resolved.members[name];
-                    if (symbolIsValue(symbol)) {
-                        return symbol;
-                    }
-                }
-            }
-        }
-        function getPropertiesOfUnionOrIntersectionType(type) {
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var current = _a[_i];
-                for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    getPropertyOfUnionOrIntersectionType(type, prop.name);
-                }
-                if (type.flags & 16384) {
-                    break;
-                }
-            }
-            return type.resolvedProperties ? symbolsToArray(type.resolvedProperties) : emptyArray;
-        }
-        function getPropertiesOfType(type) {
-            type = getApparentType(type);
-            return type.flags & 49152 ? getPropertiesOfUnionOrIntersectionType(type) : getPropertiesOfObjectType(type);
-        }
-        function getApparentTypeOfTypeParameter(type) {
-            if (!type.resolvedApparentType) {
-                var constraintType = getConstraintOfTypeParameter(type);
-                while (constraintType && constraintType.flags & 512) {
-                    constraintType = getConstraintOfTypeParameter(constraintType);
-                }
-                type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type);
-            }
-            return type.resolvedApparentType;
-        }
-        function getApparentType(type) {
-            if (type.flags & 512) {
-                type = getApparentTypeOfTypeParameter(type);
-            }
-            if (type.flags & 258) {
-                type = globalStringType;
-            }
-            else if (type.flags & 132) {
-                type = globalNumberType;
-            }
-            else if (type.flags & 8) {
-                type = globalBooleanType;
-            }
-            else if (type.flags & 16777216) {
-                type = getGlobalESSymbolType();
-            }
-            return type;
-        }
-        function createUnionOrIntersectionProperty(containingType, name) {
-            var types = containingType.types;
-            var props;
-            var commonFlags = (containingType.flags & 32768) ? 536870912 : 0;
-            for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
-                var current = types_2[_i];
-                var type = getApparentType(current);
-                if (type !== unknownType) {
-                    var prop = getPropertyOfType(type, name);
-                    if (prop && !(getDeclarationFlagsFromSymbol(prop) & (8 | 16))) {
-                        commonFlags &= prop.flags;
-                        if (!props) {
-                            props = [prop];
-                        }
-                        else if (!ts.contains(props, prop)) {
-                            props.push(prop);
-                        }
-                    }
-                    else if (containingType.flags & 16384) {
-                        return undefined;
-                    }
-                }
-            }
-            if (!props) {
-                return undefined;
-            }
-            if (props.length === 1) {
-                return props[0];
-            }
-            var propTypes = [];
-            var declarations = [];
-            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
-                var prop = props_1[_a];
-                if (prop.declarations) {
-                    ts.addRange(declarations, prop.declarations);
-                }
-                propTypes.push(getTypeOfSymbol(prop));
-            }
-            var result = createSymbol(4 |
-                67108864 |
-                268435456 |
-                commonFlags, name);
-            result.containingType = containingType;
-            result.declarations = declarations;
-            result.type = containingType.flags & 16384 ? getUnionType(propTypes) : getIntersectionType(propTypes);
-            return result;
-        }
-        function getPropertyOfUnionOrIntersectionType(type, name) {
-            var properties = type.resolvedProperties || (type.resolvedProperties = {});
-            if (ts.hasProperty(properties, name)) {
-                return properties[name];
-            }
-            var property = createUnionOrIntersectionProperty(type, name);
-            if (property) {
-                properties[name] = property;
-            }
-            return property;
-        }
-        function getPropertyOfType(type, name) {
-            type = getApparentType(type);
-            if (type.flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (ts.hasProperty(resolved.members, name)) {
-                    var symbol = resolved.members[name];
-                    if (symbolIsValue(symbol)) {
-                        return symbol;
-                    }
-                }
-                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
-                    var symbol = getPropertyOfObjectType(globalFunctionType, name);
-                    if (symbol) {
-                        return symbol;
-                    }
-                }
-                return getPropertyOfObjectType(globalObjectType, name);
-            }
-            if (type.flags & 49152) {
-                return getPropertyOfUnionOrIntersectionType(type, name);
-            }
-            return undefined;
-        }
-        function getSignaturesOfStructuredType(type, kind) {
-            if (type.flags & 130048) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 ? resolved.callSignatures : resolved.constructSignatures;
-            }
-            return emptyArray;
-        }
-        function getSignaturesOfType(type, kind) {
-            return getSignaturesOfStructuredType(getApparentType(type), kind);
-        }
-        function getIndexInfoOfStructuredType(type, kind) {
-            if (type.flags & 130048) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 ? resolved.stringIndexInfo : resolved.numberIndexInfo;
-            }
-        }
-        function getIndexTypeOfStructuredType(type, kind) {
-            var info = getIndexInfoOfStructuredType(type, kind);
-            return info && info.type;
-        }
-        function getIndexInfoOfType(type, kind) {
-            return getIndexInfoOfStructuredType(getApparentType(type), kind);
-        }
-        function getIndexTypeOfType(type, kind) {
-            return getIndexTypeOfStructuredType(getApparentType(type), kind);
-        }
-        function getImplicitIndexTypeOfType(type, kind) {
-            if (isObjectLiteralType(type)) {
-                var propTypes = [];
-                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 || isNumericLiteralName(prop.name)) {
-                        propTypes.push(getTypeOfSymbol(prop));
-                    }
-                }
-                if (propTypes.length) {
-                    return getUnionType(propTypes);
-                }
-            }
-            return undefined;
-        }
-        function getTypeParametersFromJSDocTemplate(declaration) {
-            if (declaration.flags & 134217728) {
-                var templateTag = ts.getJSDocTemplateTag(declaration);
-                if (templateTag) {
-                    return getTypeParametersFromDeclaration(templateTag.typeParameters);
-                }
-            }
-            return undefined;
-        }
-        function getTypeParametersFromDeclaration(typeParameterDeclarations) {
-            var result = [];
-            ts.forEach(typeParameterDeclarations, function (node) {
-                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
-                if (!ts.contains(result, tp)) {
-                    result.push(tp);
-                }
-            });
-            return result;
-        }
-        function symbolsToArray(symbols) {
-            var result = [];
-            for (var id in symbols) {
-                if (!isReservedMemberName(id)) {
-                    result.push(symbols[id]);
-                }
-            }
-            return result;
-        }
-        function isOptionalParameter(node) {
-            if (node.flags & 134217728) {
-                if (node.type && node.type.kind === 268) {
-                    return true;
-                }
-                var paramTag = ts.getCorrespondingJSDocParameterTag(node);
-                if (paramTag) {
-                    if (paramTag.isBracketed) {
-                        return true;
-                    }
-                    if (paramTag.typeExpression) {
-                        return paramTag.typeExpression.type.kind === 268;
-                    }
-                }
-            }
-            if (ts.hasQuestionToken(node)) {
-                return true;
-            }
-            if (node.initializer) {
-                var signatureDeclaration = node.parent;
-                var signature = getSignatureFromDeclaration(signatureDeclaration);
-                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
-                ts.Debug.assert(parameterIndex >= 0);
-                return parameterIndex >= signature.minArgumentCount;
-            }
-            return false;
-        }
-        function createTypePredicateFromTypePredicateNode(node) {
-            if (node.parameterName.kind === 69) {
-                var parameterName = node.parameterName;
-                return {
-                    kind: 1,
-                    parameterName: parameterName ? parameterName.text : undefined,
-                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
-                    type: getTypeFromTypeNode(node.type)
-                };
-            }
-            else {
-                return {
-                    kind: 0,
-                    type: getTypeFromTypeNode(node.type)
-                };
-            }
-        }
-        function getSignatureFromDeclaration(declaration) {
-            var links = getNodeLinks(declaration);
-            if (!links.resolvedSignature) {
-                var parameters = [];
-                var hasStringLiterals = false;
-                var minArgumentCount = -1;
-                var thisType = undefined;
-                var hasThisParameter = void 0;
-                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
-                for (var i = isJSConstructSignature ? 1 : 0, n = declaration.parameters.length; i < n; i++) {
-                    var param = declaration.parameters[i];
-                    var paramSymbol = param.symbol;
-                    if (paramSymbol && !!(paramSymbol.flags & 4) && !ts.isBindingPattern(param.name)) {
-                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455, undefined, undefined);
-                        paramSymbol = resolvedSymbol;
-                    }
-                    if (i === 0 && paramSymbol.name === "this") {
-                        hasThisParameter = true;
-                        thisType = param.type ? getTypeFromTypeNode(param.type) : unknownType;
-                    }
-                    else {
-                        parameters.push(paramSymbol);
-                    }
-                    if (param.type && param.type.kind === 166) {
-                        hasStringLiterals = true;
-                    }
-                    if (param.initializer || param.questionToken || param.dotDotDotToken) {
-                        if (minArgumentCount < 0) {
-                            minArgumentCount = i - (hasThisParameter ? 1 : 0);
-                        }
-                    }
-                    else {
-                        minArgumentCount = -1;
-                    }
-                }
-                if ((declaration.kind === 149 || declaration.kind === 150) &&
-                    !ts.hasDynamicName(declaration) &&
-                    (!hasThisParameter || thisType === unknownType)) {
-                    var otherKind = declaration.kind === 149 ? 150 : 149;
-                    var setter = ts.getDeclarationOfKind(declaration.symbol, otherKind);
-                    thisType = getAnnotatedAccessorThisType(setter);
-                }
-                if (minArgumentCount < 0) {
-                    minArgumentCount = declaration.parameters.length - (hasThisParameter ? 1 : 0);
-                }
-                if (isJSConstructSignature) {
-                    minArgumentCount--;
-                }
-                var classType = declaration.kind === 148 ?
-                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
-                    : undefined;
-                var typeParameters = classType ? classType.localTypeParameters :
-                    declaration.typeParameters ? getTypeParametersFromDeclaration(declaration.typeParameters) :
-                        getTypeParametersFromJSDocTemplate(declaration);
-                var returnType = getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType);
-                var typePredicate = declaration.type && declaration.type.kind === 154 ?
-                    createTypePredicateFromTypePredicateNode(declaration.type) :
-                    undefined;
-                links.resolvedSignature = createSignature(declaration, typeParameters, thisType, parameters, returnType, typePredicate, minArgumentCount, ts.hasRestParameter(declaration), hasStringLiterals);
-            }
-            return links.resolvedSignature;
-        }
-        function getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType) {
-            if (isJSConstructSignature) {
-                return getTypeFromTypeNode(declaration.parameters[0].type);
-            }
-            else if (classType) {
-                return classType;
-            }
-            else if (declaration.type) {
-                return getTypeFromTypeNode(declaration.type);
-            }
-            if (declaration.flags & 134217728) {
-                var type = getReturnTypeFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            if (declaration.kind === 149 && !ts.hasDynamicName(declaration)) {
-                var setter = ts.getDeclarationOfKind(declaration.symbol, 150);
-                return getAnnotatedAccessorType(setter);
-            }
-            if (ts.nodeIsMissing(declaration.body)) {
-                return anyType;
-            }
-        }
-        function getSignaturesOfSymbol(symbol) {
-            if (!symbol)
-                return emptyArray;
-            var result = [];
-            for (var i = 0, len = symbol.declarations.length; i < len; i++) {
-                var node = symbol.declarations[i];
-                switch (node.kind) {
-                    case 156:
-                    case 157:
-                    case 220:
-                    case 147:
-                    case 146:
-                    case 148:
-                    case 151:
-                    case 152:
-                    case 153:
-                    case 149:
-                    case 150:
-                    case 179:
-                    case 180:
-                    case 269:
-                        if (i > 0 && node.body) {
-                            var previous = symbol.declarations[i - 1];
-                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
-                                break;
-                            }
-                        }
-                        result.push(getSignatureFromDeclaration(node));
-                }
-            }
-            return result;
-        }
-        function resolveExternalModuleTypeByLiteral(name) {
-            var moduleSym = resolveExternalModuleName(name, name);
-            if (moduleSym) {
-                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
-                if (resolvedModuleSymbol) {
-                    return getTypeOfSymbol(resolvedModuleSymbol);
-                }
-            }
-            return anyType;
-        }
-        function getReturnTypeOfSignature(signature) {
-            if (!signature.resolvedReturnType) {
-                if (!pushTypeResolution(signature, 3)) {
-                    return unknownType;
-                }
-                var type = void 0;
-                if (signature.target) {
-                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
-                }
-                else if (signature.unionSignatures) {
-                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature));
-                }
-                else {
-                    type = getReturnTypeFromBody(signature.declaration);
-                }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var declaration = signature.declaration;
-                        if (declaration.name) {
-                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
-                        }
-                    }
-                }
-                signature.resolvedReturnType = type;
-            }
-            return signature.resolvedReturnType;
-        }
-        function getRestTypeOfSignature(signature) {
-            if (signature.hasRestParameter) {
-                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
-                if (type.flags & 4096 && type.target === globalArrayType) {
-                    return type.typeArguments[0];
-                }
-            }
-            return anyType;
-        }
-        function getSignatureInstantiation(signature, typeArguments) {
-            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), true);
-        }
-        function getErasedSignature(signature) {
-            if (!signature.typeParameters)
-                return signature;
-            if (!signature.erasedSignatureCache) {
-                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), true);
-            }
-            return signature.erasedSignatureCache;
-        }
-        function getOrCreateTypeFromSignature(signature) {
-            if (!signature.isolatedSignatureType) {
-                var isConstructor = signature.declaration.kind === 148 || signature.declaration.kind === 152;
-                var type = createObjectType(65536 | 262144);
-                type.members = emptySymbols;
-                type.properties = emptyArray;
-                type.callSignatures = !isConstructor ? [signature] : emptyArray;
-                type.constructSignatures = isConstructor ? [signature] : emptyArray;
-                signature.isolatedSignatureType = type;
-            }
-            return signature.isolatedSignatureType;
-        }
-        function getIndexSymbol(symbol) {
-            return symbol.members["__index"];
-        }
-        function getIndexDeclarationOfSymbol(symbol, kind) {
-            var syntaxKind = kind === 1 ? 130 : 132;
-            var indexSymbol = getIndexSymbol(symbol);
-            if (indexSymbol) {
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var node = decl;
-                    if (node.parameters.length === 1) {
-                        var parameter = node.parameters[0];
-                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
-                            return node;
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function createIndexInfo(type, isReadonly, declaration) {
-            return { type: type, isReadonly: isReadonly, declaration: declaration };
-        }
-        function getIndexInfoOfSymbol(symbol, kind) {
-            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
-            if (declaration) {
-                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (declaration.flags & 64) !== 0, declaration);
-            }
-            return undefined;
-        }
-        function getConstraintDeclaration(type) {
-            return ts.getDeclarationOfKind(type.symbol, 141).constraint;
-        }
-        function hasConstraintReferenceTo(type, target) {
-            var checked;
-            while (type && !(type.flags & 33554432) && type.flags & 512 && !ts.contains(checked, type)) {
-                if (type === target) {
-                    return true;
-                }
-                (checked || (checked = [])).push(type);
-                var constraintDeclaration = getConstraintDeclaration(type);
-                type = constraintDeclaration && getTypeFromTypeNode(constraintDeclaration);
-            }
-            return false;
-        }
-        function getConstraintOfTypeParameter(typeParameter) {
-            if (!typeParameter.constraint) {
-                if (typeParameter.target) {
-                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
-                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
-                }
-                else {
-                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
-                    var constraint = getTypeFromTypeNode(constraintDeclaration);
-                    if (hasConstraintReferenceTo(constraint, typeParameter)) {
-                        error(constraintDeclaration, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
-                        constraint = unknownType;
-                    }
-                    typeParameter.constraint = constraint;
-                }
-            }
-            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
-        }
-        function getParentSymbolOfTypeParameter(typeParameter) {
-            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 141).parent);
-        }
-        function getTypeListId(types) {
-            if (types) {
-                switch (types.length) {
-                    case 1:
-                        return "" + types[0].id;
-                    case 2:
-                        return types[0].id + "," + types[1].id;
-                    default:
-                        var result = "";
-                        for (var i = 0; i < types.length; i++) {
-                            if (i > 0) {
-                                result += ",";
-                            }
-                            result += types[i].id;
-                        }
-                        return result;
-                }
-            }
-            return "";
-        }
-        function getPropagatingFlagsOfTypes(types, excludeKinds) {
-            var result = 0;
-            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
-                var type = types_3[_i];
-                if (!(type.flags & excludeKinds)) {
-                    result |= type.flags;
-                }
-            }
-            return result & 14680064;
-        }
-        function createTypeReference(target, typeArguments) {
-            var id = getTypeListId(typeArguments);
-            var type = target.instantiations[id];
-            if (!type) {
-                var propagatedFlags = typeArguments ? getPropagatingFlagsOfTypes(typeArguments, 0) : 0;
-                var flags = 4096 | propagatedFlags;
-                type = target.instantiations[id] = createObjectType(flags, target.symbol);
-                type.target = target;
-                type.typeArguments = typeArguments;
-            }
-            return type;
-        }
-        function getTypeFromClassOrInterfaceReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
-            var typeParameters = type.localTypeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, typeToString(type, undefined, 1), typeParameters.length);
-                    return unknownType;
-                }
-                return createTypeReference(type, ts.concatenate(type.outerTypeParameters, ts.map(node.typeArguments, getTypeFromTypeNode)));
-            }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
-                return unknownType;
-            }
-            return type;
-        }
-        function getTypeFromTypeAliasReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var links = getSymbolLinks(symbol);
-            var typeParameters = links.typeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, symbolToString(symbol), typeParameters.length);
-                    return unknownType;
-                }
-                var typeArguments = ts.map(node.typeArguments, getTypeFromTypeNode);
-                var id = getTypeListId(typeArguments);
-                return links.instantiations[id] || (links.instantiations[id] = instantiateType(type, createTypeMapper(typeParameters, typeArguments)));
-            }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
-            }
-            return type;
-        }
-        function getTypeFromNonGenericTypeReference(node, symbol) {
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
-            }
-            return getDeclaredTypeOfSymbol(symbol);
-        }
-        function getTypeReferenceName(node) {
-            switch (node.kind) {
-                case 155:
-                    return node.typeName;
-                case 267:
-                    return node.name;
-                case 194:
-                    if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                        return node.expression;
-                    }
-            }
-            return undefined;
-        }
-        function resolveTypeReferenceName(node, typeReferenceName) {
-            if (!typeReferenceName) {
-                return unknownSymbol;
-            }
-            return resolveEntityName(typeReferenceName, 793056) || unknownSymbol;
-        }
-        function getTypeReferenceType(node, symbol) {
-            if (symbol === unknownSymbol) {
-                return unknownType;
-            }
-            if (symbol.flags & (32 | 64)) {
-                return getTypeFromClassOrInterfaceReference(node, symbol);
-            }
-            if (symbol.flags & 524288) {
-                return getTypeFromTypeAliasReference(node, symbol);
-            }
-            if (symbol.flags & 107455 && node.kind === 267) {
-                return getTypeOfSymbol(symbol);
-            }
-            return getTypeFromNonGenericTypeReference(node, symbol);
-        }
-        function getTypeFromTypeReference(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var symbol = void 0;
-                var type = void 0;
-                if (node.kind === 267) {
-                    var typeReferenceName = getTypeReferenceName(node);
-                    symbol = resolveTypeReferenceName(node, typeReferenceName);
-                    type = getTypeReferenceType(node, symbol);
-                    links.resolvedSymbol = symbol;
-                    links.resolvedType = type;
-                }
-                else {
-                    var typeNameOrExpression = node.kind === 155 ? node.typeName :
-                        ts.isSupportedExpressionWithTypeArguments(node) ? node.expression :
-                            undefined;
-                    symbol = typeNameOrExpression && resolveEntityName(typeNameOrExpression, 793056) || unknownSymbol;
-                    type = symbol === unknownSymbol ? unknownType :
-                        symbol.flags & (32 | 64) ? getTypeFromClassOrInterfaceReference(node, symbol) :
-                            symbol.flags & 524288 ? getTypeFromTypeAliasReference(node, symbol) :
-                                getTypeFromNonGenericTypeReference(node, symbol);
-                }
-                links.resolvedSymbol = symbol;
-                links.resolvedType = type;
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeQueryNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getWidenedType(checkExpression(node.exprName));
-            }
-            return links.resolvedType;
-        }
-        function getTypeOfGlobalSymbol(symbol, arity) {
-            function getTypeDeclaration(symbol) {
-                var declarations = symbol.declarations;
-                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
-                    var declaration = declarations_3[_i];
-                    switch (declaration.kind) {
-                        case 221:
-                        case 222:
-                        case 224:
-                            return declaration;
-                    }
-                }
-            }
-            if (!symbol) {
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            var type = getDeclaredTypeOfSymbol(symbol);
-            if (!(type.flags & 80896)) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            if ((type.typeParameters ? type.typeParameters.length : 0) !== arity) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            return type;
-        }
-        function getGlobalValueSymbol(name) {
-            return getGlobalSymbol(name, 107455, ts.Diagnostics.Cannot_find_global_value_0);
-        }
-        function getGlobalTypeSymbol(name) {
-            return getGlobalSymbol(name, 793056, ts.Diagnostics.Cannot_find_global_type_0);
-        }
-        function getGlobalSymbol(name, meaning, diagnostic) {
-            return resolveName(undefined, name, meaning, diagnostic, name);
-        }
-        function getGlobalType(name, arity) {
-            if (arity === void 0) { arity = 0; }
-            return getTypeOfGlobalSymbol(getGlobalTypeSymbol(name), arity);
-        }
-        function getExportedTypeFromNamespace(namespace, name) {
-            var namespaceSymbol = getGlobalSymbol(namespace, 1536, undefined);
-            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793056);
-            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
-        }
-        function createTypedPropertyDescriptorType(propertyType) {
-            var globalTypedPropertyDescriptorType = getGlobalTypedPropertyDescriptorType();
-            return globalTypedPropertyDescriptorType !== emptyGenericType
-                ? createTypeReference(globalTypedPropertyDescriptorType, [propertyType])
-                : emptyObjectType;
-        }
-        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
-            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
-        }
-        function createIterableType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableType(), [elementType]);
-        }
-        function createIterableIteratorType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(), [elementType]);
-        }
-        function createArrayType(elementType) {
-            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
-        }
-        function getTypeFromArrayTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
-            }
-            return links.resolvedType;
-        }
-        function createTupleType(elementTypes) {
-            var id = getTypeListId(elementTypes);
-            return tupleTypes[id] || (tupleTypes[id] = createNewTupleType(elementTypes));
-        }
-        function createNewTupleType(elementTypes) {
-            var propagatedFlags = getPropagatingFlagsOfTypes(elementTypes, 0);
-            var type = createObjectType(8192 | propagatedFlags);
-            type.elementTypes = elementTypes;
-            return type;
-        }
-        function getTypeFromTupleTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNode));
-            }
-            return links.resolvedType;
-        }
-        function addTypeToSet(typeSet, type, typeSetKind) {
-            if (type.flags & typeSetKind) {
-                addTypesToSet(typeSet, type.types, typeSetKind);
-            }
-            else if (type.flags & (1 | 32 | 64)) {
-                if (type.flags & 1)
-                    typeSet.containsAny = true;
-                if (type.flags & 32)
-                    typeSet.containsUndefined = true;
-                if (type.flags & 64)
-                    typeSet.containsNull = true;
-            }
-            else if (type !== neverType && !ts.contains(typeSet, type)) {
-                typeSet.push(type);
-            }
-        }
-        function addTypesToSet(typeSet, types, typeSetKind) {
-            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
-                var type = types_4[_i];
-                addTypeToSet(typeSet, type, typeSetKind);
-            }
-        }
-        function isSubtypeOfAny(candidate, types) {
-            for (var i = 0, len = types.length; i < len; i++) {
-                if (candidate !== types[i] && isTypeSubtypeOf(candidate, types[i])) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function removeSubtypes(types) {
-            var i = types.length;
-            while (i > 0) {
-                i--;
-                if (isSubtypeOfAny(types[i], types)) {
-                    types.splice(i, 1);
-                }
-            }
-        }
-        function getUnionType(types, noSubtypeReduction) {
-            if (types.length === 0) {
-                return neverType;
-            }
-            if (types.length === 1) {
-                return types[0];
-            }
-            var typeSet = [];
-            addTypesToSet(typeSet, types, 16384);
-            if (typeSet.containsAny) {
-                return anyType;
-            }
-            if (strictNullChecks) {
-                if (typeSet.containsNull)
-                    typeSet.push(nullType);
-                if (typeSet.containsUndefined)
-                    typeSet.push(undefinedType);
-            }
-            if (!noSubtypeReduction) {
-                removeSubtypes(typeSet);
-            }
-            if (typeSet.length === 0) {
-                return typeSet.containsNull ? nullType :
-                    typeSet.containsUndefined ? undefinedType :
-                        neverType;
-            }
-            else if (typeSet.length === 1) {
-                return typeSet[0];
-            }
-            var id = getTypeListId(typeSet);
-            var type = unionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, 96);
-                type = unionTypes[id] = createObjectType(16384 | propagatedFlags);
-                type.types = typeSet;
-            }
-            return type;
-        }
-        function getTypeFromUnionTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), true);
-            }
-            return links.resolvedType;
-        }
-        function getIntersectionType(types) {
-            if (types.length === 0) {
-                return emptyObjectType;
-            }
-            var typeSet = [];
-            addTypesToSet(typeSet, types, 32768);
-            if (typeSet.containsAny) {
-                return anyType;
-            }
-            if (strictNullChecks) {
-                if (typeSet.containsNull)
-                    typeSet.push(nullType);
-                if (typeSet.containsUndefined)
-                    typeSet.push(undefinedType);
-            }
-            if (typeSet.length === 1) {
-                return typeSet[0];
-            }
-            var id = getTypeListId(typeSet);
-            var type = intersectionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, 96);
-                type = intersectionTypes[id] = createObjectType(32768 | propagatedFlags);
-                type.types = typeSet;
-            }
-            return type;
-        }
-        function getTypeFromIntersectionTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNode));
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createObjectType(65536, node.symbol);
-            }
-            return links.resolvedType;
-        }
-        function getStringLiteralTypeForText(text) {
-            if (ts.hasProperty(stringLiteralTypes, text)) {
-                return stringLiteralTypes[text];
-            }
-            var type = stringLiteralTypes[text] = createType(256);
-            type.text = text;
-            return type;
-        }
-        function getTypeFromStringLiteralTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getStringLiteralTypeForText(ts.unescapeIdentifier(node.text));
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromJSDocVariadicType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var type = getTypeFromTypeNode(node.type);
-                links.resolvedType = type ? createArrayType(type) : unknownType;
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromJSDocTupleType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var types = ts.map(node.types, getTypeFromTypeNode);
-                links.resolvedType = createTupleType(types);
-            }
-            return links.resolvedType;
-        }
-        function getThisType(node) {
-            var container = ts.getThisContainer(node, false);
-            var parent = container && container.parent;
-            if (parent && (ts.isClassLike(parent) || parent.kind === 222)) {
-                if (!(container.flags & 32) &&
-                    (container.kind !== 148 || ts.isNodeDescendentOf(node, container.body))) {
-                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
-                }
-            }
-            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
-            return unknownType;
-        }
-        function getTypeFromThisTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getThisType(node);
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeNode(node) {
-            switch (node.kind) {
-                case 117:
-                case 258:
-                case 259:
-                    return anyType;
-                case 132:
-                    return stringType;
-                case 130:
-                    return numberType;
-                case 120:
-                    return booleanType;
-                case 133:
-                    return esSymbolType;
-                case 103:
-                    return voidType;
-                case 135:
-                    return undefinedType;
-                case 93:
-                    return nullType;
-                case 127:
-                    return neverType;
-                case 165:
-                case 97:
-                    return getTypeFromThisTypeNode(node);
-                case 166:
-                    return getTypeFromStringLiteralTypeNode(node);
-                case 155:
-                case 267:
-                    return getTypeFromTypeReference(node);
-                case 154:
-                    return booleanType;
-                case 194:
-                    return getTypeFromTypeReference(node);
-                case 158:
-                    return getTypeFromTypeQueryNode(node);
-                case 160:
-                case 260:
-                    return getTypeFromArrayTypeNode(node);
-                case 161:
-                    return getTypeFromTupleTypeNode(node);
-                case 162:
-                case 261:
-                    return getTypeFromUnionTypeNode(node);
-                case 163:
-                    return getTypeFromIntersectionTypeNode(node);
-                case 164:
-                case 263:
-                case 264:
-                case 271:
-                case 272:
-                case 268:
-                    return getTypeFromTypeNode(node.type);
-                case 156:
-                case 157:
-                case 159:
-                case 269:
-                case 265:
-                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
-                case 69:
-                case 139:
-                    var symbol = getSymbolAtLocation(node);
-                    return symbol && getDeclaredTypeOfSymbol(symbol);
-                case 262:
-                    return getTypeFromJSDocTupleType(node);
-                case 270:
-                    return getTypeFromJSDocVariadicType(node);
-                default:
-                    return unknownType;
-            }
-        }
-        function instantiateList(items, mapper, instantiator) {
-            if (items && items.length) {
-                var result = [];
-                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
-                    var v = items_1[_i];
-                    result.push(instantiator(v, mapper));
-                }
-                return result;
-            }
-            return items;
-        }
-        function createUnaryTypeMapper(source, target) {
-            return function (t) { return t === source ? target : t; };
-        }
-        function createBinaryTypeMapper(source1, target1, source2, target2) {
-            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
-        }
-        function createArrayTypeMapper(sources, targets) {
-            return function (t) {
-                for (var i = 0; i < sources.length; i++) {
-                    if (t === sources[i]) {
-                        return targets ? targets[i] : anyType;
-                    }
-                }
-                return t;
-            };
-        }
-        function createTypeMapper(sources, targets) {
-            var count = sources.length;
-            var mapper = count == 1 ? createUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
-                count == 2 ? createBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
-                    createArrayTypeMapper(sources, targets);
-            mapper.mappedTypes = sources;
-            return mapper;
-        }
-        function createTypeEraser(sources) {
-            return createTypeMapper(sources, undefined);
-        }
-        function getInferenceMapper(context) {
-            if (!context.mapper) {
-                var mapper = function (t) {
-                    var typeParameters = context.typeParameters;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (t === typeParameters[i]) {
-                            context.inferences[i].isFixed = true;
-                            return getInferredType(context, i);
-                        }
-                    }
-                    return t;
-                };
-                mapper.mappedTypes = context.typeParameters;
-                mapper.context = context;
-                context.mapper = mapper;
-            }
-            return context.mapper;
-        }
-        function identityMapper(type) {
-            return type;
-        }
-        function combineTypeMappers(mapper1, mapper2) {
-            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
-            mapper.mappedTypes = mapper1.mappedTypes;
-            return mapper;
-        }
-        function cloneTypeParameter(typeParameter) {
-            var result = createType(512);
-            result.symbol = typeParameter.symbol;
-            result.target = typeParameter;
-            return result;
-        }
-        function cloneTypePredicate(predicate, mapper) {
-            if (ts.isIdentifierTypePredicate(predicate)) {
-                return {
-                    kind: 1,
-                    parameterName: predicate.parameterName,
-                    parameterIndex: predicate.parameterIndex,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
-            else {
-                return {
-                    kind: 0,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
-        }
-        function instantiateSignature(signature, mapper, eraseTypeParameters) {
-            var freshTypeParameters;
-            var freshTypePredicate;
-            if (signature.typeParameters && !eraseTypeParameters) {
-                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
-                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
-                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
-                    var tp = freshTypeParameters_1[_i];
-                    tp.mapper = mapper;
-                }
-            }
-            if (signature.typePredicate) {
-                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
-            }
-            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisType && instantiateType(signature.thisType, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), instantiateType(signature.resolvedReturnType, mapper), freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasStringLiterals);
-            result.target = signature;
-            result.mapper = mapper;
-            return result;
-        }
-        function instantiateSymbol(symbol, mapper) {
-            if (symbol.flags & 16777216) {
-                var links = getSymbolLinks(symbol);
-                symbol = links.target;
-                mapper = combineTypeMappers(links.mapper, mapper);
-            }
-            var result = createSymbol(16777216 | 67108864 | symbol.flags, symbol.name);
-            result.declarations = symbol.declarations;
-            result.parent = symbol.parent;
-            result.target = symbol;
-            result.mapper = mapper;
-            if (symbol.valueDeclaration) {
-                result.valueDeclaration = symbol.valueDeclaration;
-            }
-            return result;
-        }
-        function instantiateAnonymousType(type, mapper) {
-            if (mapper.instantiations) {
-                var cachedType = mapper.instantiations[type.id];
-                if (cachedType) {
-                    return cachedType;
-                }
-            }
-            else {
-                mapper.instantiations = [];
-            }
-            var result = createObjectType(65536 | 131072, type.symbol);
-            result.target = type;
-            result.mapper = mapper;
-            mapper.instantiations[type.id] = result;
-            return result;
-        }
-        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
-            var mappedTypes = mapper.mappedTypes;
-            var node = symbol.declarations[0].parent;
-            while (node) {
-                switch (node.kind) {
-                    case 156:
-                    case 157:
-                    case 220:
-                    case 147:
-                    case 146:
-                    case 148:
-                    case 151:
-                    case 152:
-                    case 153:
-                    case 149:
-                    case 150:
-                    case 179:
-                    case 180:
-                    case 221:
-                    case 192:
-                    case 222:
-                    case 223:
-                        var declaration = node;
-                        if (declaration.typeParameters) {
-                            for (var _i = 0, _a = declaration.typeParameters; _i < _a.length; _i++) {
-                                var d = _a[_i];
-                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
-                                    return true;
-                                }
-                            }
-                        }
-                        if (ts.isClassLike(node) || node.kind === 222) {
-                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
-                            if (thisType && ts.contains(mappedTypes, thisType)) {
-                                return true;
-                            }
-                        }
-                        break;
-                    case 225:
-                    case 256:
-                        return false;
-                }
-                node = node.parent;
-            }
-            return false;
-        }
-        function instantiateType(type, mapper) {
-            if (type && mapper !== identityMapper) {
-                if (type.flags & 512) {
-                    return mapper(type);
-                }
-                if (type.flags & 65536) {
-                    return type.symbol &&
-                        type.symbol.flags & (16 | 8192 | 32 | 2048 | 4096) &&
-                        (type.flags & 131072 || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
-                        instantiateAnonymousType(type, mapper) : type;
-                }
-                if (type.flags & 4096) {
-                    return createTypeReference(type.target, instantiateList(type.typeArguments, mapper, instantiateType));
-                }
-                if (type.flags & 8192) {
-                    return createTupleType(instantiateList(type.elementTypes, mapper, instantiateType));
-                }
-                if (type.flags & 16384) {
-                    return getUnionType(instantiateList(type.types, mapper, instantiateType), true);
-                }
-                if (type.flags & 32768) {
-                    return getIntersectionType(instantiateList(type.types, mapper, instantiateType));
-                }
-            }
-            return type;
-        }
-        function instantiateIndexInfo(info, mapper) {
-            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
-        }
-        function isContextSensitive(node) {
-            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
-            switch (node.kind) {
-                case 179:
-                case 180:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 171:
-                    return ts.forEach(node.properties, isContextSensitive);
-                case 170:
-                    return ts.forEach(node.elements, isContextSensitive);
-                case 188:
-                    return isContextSensitive(node.whenTrue) ||
-                        isContextSensitive(node.whenFalse);
-                case 187:
-                    return node.operatorToken.kind === 52 &&
-                        (isContextSensitive(node.left) || isContextSensitive(node.right));
-                case 253:
-                    return isContextSensitive(node.initializer);
-                case 147:
-                case 146:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 178:
-                    return isContextSensitive(node.expression);
-            }
-            return false;
-        }
-        function isContextSensitiveFunctionLikeDeclaration(node) {
-            var areAllParametersUntyped = !ts.forEach(node.parameters, function (p) { return p.type; });
-            var isNullaryArrow = node.kind === 180 && !node.parameters.length;
-            return !node.typeParameters && areAllParametersUntyped && !isNullaryArrow;
-        }
-        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
-            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
-        }
-        function getTypeWithoutSignatures(type) {
-            if (type.flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.constructSignatures.length) {
-                    var result = createObjectType(65536, type.symbol);
-                    result.members = resolved.members;
-                    result.properties = resolved.properties;
-                    result.callSignatures = emptyArray;
-                    result.constructSignatures = emptyArray;
-                    type = result;
-                }
-            }
-            return type;
-        }
-        function isTypeIdenticalTo(source, target) {
-            return checkTypeRelatedTo(source, target, identityRelation, undefined);
-        }
-        function compareTypesIdentical(source, target) {
-            return checkTypeRelatedTo(source, target, identityRelation, undefined) ? -1 : 0;
-        }
-        function compareTypesAssignable(source, target) {
-            return checkTypeRelatedTo(source, target, assignableRelation, undefined) ? -1 : 0;
-        }
-        function isTypeSubtypeOf(source, target) {
-            return checkTypeSubtypeOf(source, target, undefined);
-        }
-        function isTypeAssignableTo(source, target) {
-            return checkTypeAssignableTo(source, target, undefined);
-        }
-        function isTypeComparableTo(source, target) {
-            return checkTypeComparableTo(source, target, undefined);
-        }
-        function checkTypeSubtypeOf(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
-            return compareSignaturesRelated(source, target, ignoreReturnTypes, false, undefined, compareTypesAssignable) !== 0;
-        }
-        function compareSignaturesRelated(source, target, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
-            if (source === target) {
-                return -1;
-            }
-            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
-                return 0;
-            }
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1;
-            if (source.thisType && target.thisType && source.thisType !== voidType) {
-                var related = compareTypes(source.thisType, target.thisType, false)
-                    || compareTypes(target.thisType, source.thisType, reportErrors);
-                if (!related) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
-                    }
-                    return 0;
-                }
-                result &= related;
-            }
-            var sourceMax = getNumNonRestParameters(source);
-            var targetMax = getNumNonRestParameters(target);
-            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
-            var sourceParams = source.parameters;
-            var targetParams = target.parameters;
-            for (var i = 0; i < checkCount; i++) {
-                var s = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
-                var t = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
-                var related = compareTypes(s, t, false) || compareTypes(t, s, reportErrors);
-                if (!related) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
-                    }
-                    return 0;
-                }
-                result &= related;
-            }
-            if (!ignoreReturnTypes) {
-                var targetReturnType = getReturnTypeOfSignature(target);
-                if (targetReturnType === voidType) {
-                    return result;
-                }
-                var sourceReturnType = getReturnTypeOfSignature(source);
-                if (target.typePredicate) {
-                    if (source.typePredicate) {
-                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
-                    }
-                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
-                        if (reportErrors) {
-                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
-                        }
-                        return 0;
-                    }
-                }
-                else {
-                    result &= compareTypes(sourceReturnType, targetReturnType, reportErrors);
-                }
-            }
-            return result;
-        }
-        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
-            if (source.kind !== target.kind) {
-                if (reportErrors) {
-                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
-                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-                }
-                return 0;
-            }
-            if (source.kind === 1) {
-                var sourceIdentifierPredicate = source;
-                var targetIdentifierPredicate = target;
-                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
-                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-                    }
-                    return 0;
-                }
-            }
-            var related = compareTypes(source.type, target.type, reportErrors);
-            if (related === 0 && reportErrors) {
-                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-            }
-            return related;
-        }
-        function isImplementationCompatibleWithOverload(implementation, overload) {
-            var erasedSource = getErasedSignature(implementation);
-            var erasedTarget = getErasedSignature(overload);
-            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
-            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
-            if (targetReturnType === voidType
-                || checkTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation, undefined)
-                || checkTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation, undefined)) {
-                return isSignatureAssignableTo(erasedSource, erasedTarget, true);
-            }
-            return false;
-        }
-        function getNumNonRestParameters(signature) {
-            var numParams = signature.parameters.length;
-            return signature.hasRestParameter ?
-                numParams - 1 :
-                numParams;
-        }
-        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
-            if (source.hasRestParameter === target.hasRestParameter) {
-                if (source.hasRestParameter) {
-                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
-                }
-                else {
-                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
-                }
-            }
-            else {
-                return source.hasRestParameter ?
-                    targetNonRestParamCount :
-                    sourceNonRestParamCount;
-            }
-        }
-        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
-            var errorInfo;
-            var sourceStack;
-            var targetStack;
-            var maybeStack;
-            var expandingFlags;
-            var depth = 0;
-            var overflow = false;
-            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
-            var result = isRelatedTo(source, target, !!errorNode, headMessage);
-            if (overflow) {
-                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
-            }
-            else if (errorInfo) {
-                if (containingMessageChain) {
-                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
-                }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
-            }
-            return result !== 0;
-            function reportError(message, arg0, arg1, arg2) {
-                ts.Debug.assert(!!errorNode);
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
-            }
-            function reportRelationError(message, source, target) {
-                var sourceType = typeToString(source);
-                var targetType = typeToString(target);
-                if (sourceType === targetType) {
-                    sourceType = typeToString(source, undefined, 128);
-                    targetType = typeToString(target, undefined, 128);
-                }
-                if (!message) {
-                    message = relation === comparableRelation ?
-                        ts.Diagnostics.Type_0_is_not_comparable_to_type_1 :
-                        ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
-                }
-                reportError(message, sourceType, targetType);
-            }
-            function isRelatedTo(source, target, reportErrors, headMessage) {
-                var result;
-                if (source === target)
-                    return -1;
-                if (relation === identityRelation) {
-                    return isIdenticalTo(source, target);
-                }
-                if (!(target.flags & 134217728)) {
-                    if (target.flags & 1 || source.flags & 134217728)
-                        return -1;
-                    if (source.flags & 32) {
-                        if (!strictNullChecks || target.flags & (32 | 16) || source === emptyArrayElementType)
-                            return -1;
-                    }
-                    if (source.flags & 64) {
-                        if (!strictNullChecks || target.flags & 64)
-                            return -1;
-                    }
-                    if (source.flags & 128 && target === numberType)
-                        return -1;
-                    if (source.flags & 128 && target.flags & 128) {
-                        if (result = enumRelatedTo(source, target, reportErrors)) {
-                            return result;
-                        }
-                    }
-                    if (source.flags & 256 && target === stringType)
-                        return -1;
-                    if (relation === assignableRelation || relation === comparableRelation) {
-                        if (source.flags & 1)
-                            return -1;
-                        if (source === numberType && target.flags & 128)
-                            return -1;
-                    }
-                    if (source.flags & 8 && target.flags & 8) {
-                        return -1;
-                    }
-                }
-                if (source.flags & 1048576) {
-                    if (hasExcessProperties(source, target, reportErrors)) {
-                        if (reportErrors) {
-                            reportRelationError(headMessage, source, target);
-                        }
-                        return 0;
-                    }
-                    if (target.flags & 49152) {
-                        source = getRegularTypeOfObjectLiteral(source);
-                    }
-                }
-                var saveErrorInfo = errorInfo;
-                if (source.flags & 16384) {
-                    if (relation === comparableRelation) {
-                        result = someTypeRelatedToType(source, target, reportErrors);
-                    }
-                    else {
-                        result = eachTypeRelatedToType(source, target, reportErrors);
-                    }
-                    if (result) {
-                        return result;
-                    }
-                }
-                else if (target.flags & 32768) {
-                    result = typeRelatedToEachType(source, target, reportErrors);
-                    if (result) {
-                        return result;
-                    }
-                }
-                else {
-                    if (source.flags & 32768) {
-                        if (result = someTypeRelatedToType(source, target, false)) {
-                            return result;
-                        }
-                    }
-                    if (target.flags & 16384) {
-                        if (result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 16777726))) {
-                            return result;
-                        }
-                    }
-                }
-                if (source.flags & 512) {
-                    var constraint = getConstraintOfTypeParameter(source);
-                    if (!constraint || constraint.flags & 1) {
-                        constraint = emptyObjectType;
-                    }
-                    constraint = getTypeWithThisArgument(constraint, source);
-                    var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
-                    if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
-                        errorInfo = saveErrorInfo;
-                        return result;
-                    }
-                }
-                else {
-                    if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
-                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
-                            return result;
-                        }
-                    }
-                    var apparentSource = getApparentType(source);
-                    if (apparentSource.flags & (80896 | 32768) && target.flags & 80896) {
-                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !(source.flags & 16777726);
-                        if (result = objectTypeRelatedTo(apparentSource, source, target, reportStructuralErrors)) {
-                            errorInfo = saveErrorInfo;
-                            return result;
-                        }
-                    }
-                }
-                if (reportErrors) {
-                    reportRelationError(headMessage, source, target);
-                }
-                return 0;
-            }
-            function isIdenticalTo(source, target) {
-                var result;
-                if (source.flags & 80896 && target.flags & 80896) {
-                    if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
-                        if (result = typeArgumentsRelatedTo(source, target, false)) {
-                            return result;
-                        }
-                    }
-                    return objectTypeRelatedTo(source, source, target, false);
-                }
-                if (source.flags & 16384 && target.flags & 16384 ||
-                    source.flags & 32768 && target.flags & 32768) {
-                    if (result = eachTypeRelatedToSomeType(source, target, false)) {
-                        if (result &= eachTypeRelatedToSomeType(target, source, false)) {
-                            return result;
-                        }
-                    }
-                }
-                return 0;
-            }
-            function isKnownProperty(type, name) {
-                if (type.flags & 80896) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if ((relation === assignableRelation || relation === comparableRelation) &&
-                        (type === globalObjectType || isEmptyObjectType(resolved)) ||
-                        resolved.stringIndexInfo || resolved.numberIndexInfo || getPropertyOfType(type, name)) {
-                        return true;
-                    }
-                }
-                else if (type.flags & 49152) {
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (isKnownProperty(t, name)) {
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
-            function isEmptyObjectType(t) {
-                return t.properties.length === 0 &&
-                    t.callSignatures.length === 0 &&
-                    t.constructSignatures.length === 0 &&
-                    !t.stringIndexInfo &&
-                    !t.numberIndexInfo;
-            }
-            function hasExcessProperties(source, target, reportErrors) {
-                if (!(target.flags & 67108864) && maybeTypeOfKind(target, 80896)) {
-                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                        var prop = _a[_i];
-                        if (!isKnownProperty(target, prop.name)) {
-                            if (reportErrors) {
-                                ts.Debug.assert(!!errorNode);
-                                errorNode = prop.valueDeclaration;
-                                reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
-                            }
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
-            function eachTypeRelatedToSomeType(source, target, reportErrors) {
-                var result = -1;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
-                    var sourceType = sourceTypes_1[_i];
-                    var related = typeRelatedToSomeType(sourceType, target, false);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function typeRelatedToSomeType(source, target, reportErrors) {
-                var targetTypes = target.types;
-                var len = targetTypes.length;
-                while (len >= 2 && targetTypes[len - 1].flags & 96) {
-                    var related = isRelatedTo(source, targetTypes[len - 1], false);
-                    if (related) {
-                        return related;
-                    }
-                    len--;
-                }
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(source, targetTypes[i], reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
-                    }
-                }
-                return 0;
-            }
-            function typeRelatedToEachType(source, target, reportErrors) {
-                var result = -1;
-                var targetTypes = target.types;
-                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
-                    var targetType = targetTypes_1[_i];
-                    var related = isRelatedTo(source, targetType, reportErrors);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function someTypeRelatedToType(source, target, reportErrors) {
-                var sourceTypes = source.types;
-                var len = sourceTypes.length;
-                while (len >= 2 && sourceTypes[len - 1].flags & 96) {
-                    var related = isRelatedTo(sourceTypes[len - 1], target, false);
-                    if (related) {
-                        return related;
-                    }
-                    len--;
-                }
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
-                    }
-                }
-                return 0;
-            }
-            function eachTypeRelatedToType(source, target, reportErrors) {
-                var result = -1;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
-                    var sourceType = sourceTypes_2[_i];
-                    var related = isRelatedTo(sourceType, target, reportErrors);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function typeArgumentsRelatedTo(source, target, reportErrors) {
-                var sources = source.typeArguments || emptyArray;
-                var targets = target.typeArguments || emptyArray;
-                if (sources.length !== targets.length && relation === identityRelation) {
-                    return 0;
-                }
-                var length = sources.length <= targets.length ? sources.length : targets.length;
-                var result = -1;
-                for (var i = 0; i < length; i++) {
-                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function objectTypeRelatedTo(source, originalSource, target, reportErrors) {
-                if (overflow) {
-                    return 0;
-                }
-                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
-                var related = relation[id];
-                if (related !== undefined) {
-                    if (reportErrors && related === 2) {
-                        relation[id] = 3;
-                    }
-                    else {
-                        return related === 1 ? -1 : 0;
-                    }
-                }
-                if (depth > 0) {
-                    for (var i = 0; i < depth; i++) {
-                        if (maybeStack[i][id]) {
-                            return 1;
-                        }
-                    }
-                    if (depth === 100) {
-                        overflow = true;
-                        return 0;
-                    }
-                }
-                else {
-                    sourceStack = [];
-                    targetStack = [];
-                    maybeStack = [];
-                    expandingFlags = 0;
-                }
-                sourceStack[depth] = source;
-                targetStack[depth] = target;
-                maybeStack[depth] = {};
-                maybeStack[depth][id] = 1;
-                depth++;
-                var saveExpandingFlags = expandingFlags;
-                if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth))
-                    expandingFlags |= 1;
-                if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth))
-                    expandingFlags |= 2;
-                var result;
-                if (expandingFlags === 3) {
-                    result = 1;
-                }
-                else {
-                    result = propertiesRelatedTo(source, target, reportErrors);
-                    if (result) {
-                        result &= signaturesRelatedTo(source, target, 0, reportErrors);
-                        if (result) {
-                            result &= signaturesRelatedTo(source, target, 1, reportErrors);
-                            if (result) {
-                                result &= indexTypesRelatedTo(source, originalSource, target, 0, reportErrors);
-                                if (result) {
-                                    result &= indexTypesRelatedTo(source, originalSource, target, 1, reportErrors);
-                                }
-                            }
-                        }
-                    }
-                }
-                expandingFlags = saveExpandingFlags;
-                depth--;
-                if (result) {
-                    var maybeCache = maybeStack[depth];
-                    var destinationCache = (result === -1 || depth === 0) ? relation : maybeStack[depth - 1];
-                    ts.copyMap(maybeCache, destinationCache);
-                }
-                else {
-                    relation[id] = reportErrors ? 3 : 2;
-                }
-                return result;
-            }
-            function propertiesRelatedTo(source, target, reportErrors) {
-                if (relation === identityRelation) {
-                    return propertiesIdenticalTo(source, target);
-                }
-                var result = -1;
-                var properties = getPropertiesOfObjectType(target);
-                var requireOptionalProperties = relation === subtypeRelation && !(source.flags & 524288);
-                for (var _i = 0, properties_1 = properties; _i < properties_1.length; _i++) {
-                    var targetProp = properties_1[_i];
-                    var sourceProp = getPropertyOfType(source, targetProp.name);
-                    if (sourceProp !== targetProp) {
-                        if (!sourceProp) {
-                            if (!(targetProp.flags & 536870912) || requireOptionalProperties) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
-                                }
-                                return 0;
-                            }
-                        }
-                        else if (!(targetProp.flags & 134217728)) {
-                            var sourcePropFlags = getDeclarationFlagsFromSymbol(sourceProp);
-                            var targetPropFlags = getDeclarationFlagsFromSymbol(targetProp);
-                            if (sourcePropFlags & 8 || targetPropFlags & 8) {
-                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
-                                    if (reportErrors) {
-                                        if (sourcePropFlags & 8 && targetPropFlags & 8) {
-                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
-                                        }
-                                        else {
-                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 ? source : target), typeToString(sourcePropFlags & 8 ? target : source));
-                                        }
-                                    }
-                                    return 0;
-                                }
-                            }
-                            else if (targetPropFlags & 16) {
-                                var sourceDeclaredInClass = sourceProp.parent && sourceProp.parent.flags & 32;
-                                var sourceClass = sourceDeclaredInClass ? getDeclaredTypeOfSymbol(getParentOfSymbol(sourceProp)) : undefined;
-                                var targetClass = getDeclaredTypeOfSymbol(getParentOfSymbol(targetProp));
-                                if (!sourceClass || !hasBaseType(sourceClass, targetClass)) {
-                                    if (reportErrors) {
-                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(sourceClass || source), typeToString(targetClass));
-                                    }
-                                    return 0;
-                                }
-                            }
-                            else if (sourcePropFlags & 16) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0;
-                            }
-                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
-                            if (!related) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
-                                }
-                                return 0;
-                            }
-                            result &= related;
-                            if (sourceProp.flags & 536870912 && !(targetProp.flags & 536870912)) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0;
-                            }
-                        }
-                    }
-                }
-                return result;
-            }
-            function propertiesIdenticalTo(source, target) {
-                if (!(source.flags & 80896 && target.flags & 80896)) {
-                    return 0;
-                }
-                var sourceProperties = getPropertiesOfObjectType(source);
-                var targetProperties = getPropertiesOfObjectType(target);
-                if (sourceProperties.length !== targetProperties.length) {
-                    return 0;
-                }
-                var result = -1;
-                for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
-                    var sourceProp = sourceProperties_1[_i];
-                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
-                    if (!targetProp) {
-                        return 0;
-                    }
-                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function signaturesRelatedTo(source, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return signaturesIdenticalTo(source, target, kind);
-                }
-                if (target === anyFunctionType || source === anyFunctionType) {
-                    return -1;
-                }
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (kind === 1 && sourceSignatures.length && targetSignatures.length) {
-                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
-                        if (reportErrors) {
-                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
-                        }
-                        return 0;
-                    }
-                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
-                        return 0;
-                    }
-                }
-                var result = -1;
-                var saveErrorInfo = errorInfo;
-                outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
-                    var t = targetSignatures_1[_i];
-                    var shouldElaborateErrors = reportErrors;
-                    for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
-                        var s = sourceSignatures_1[_a];
-                        var related = signatureRelatedTo(s, t, shouldElaborateErrors);
-                        if (related) {
-                            result &= related;
-                            errorInfo = saveErrorInfo;
-                            continue outer;
-                        }
-                        shouldElaborateErrors = false;
-                    }
-                    if (shouldElaborateErrors) {
-                        reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, undefined, undefined, kind));
-                    }
-                    return 0;
-                }
-                return result;
-            }
-            function signatureRelatedTo(source, target, reportErrors) {
-                return compareSignaturesRelated(source, target, false, reportErrors, reportError, isRelatedTo);
-            }
-            function signaturesIdenticalTo(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (sourceSignatures.length !== targetSignatures.length) {
-                    return 0;
-                }
-                var result = -1;
-                for (var i = 0, len = sourceSignatures.length; i < len; i++) {
-                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], false, false, false, isRelatedTo);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
-                var result = -1;
-                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 || isNumericLiteralName(prop.name)) {
-                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
-                        if (!related) {
-                            if (reportErrors) {
-                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
-                            }
-                            return 0;
-                        }
-                        result &= related;
-                    }
-                }
-                return result;
-            }
-            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
-                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
-                if (!related && reportErrors) {
-                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
-                }
-                return related;
-            }
-            function indexTypesRelatedTo(source, originalSource, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return indexTypesIdenticalTo(source, target, kind);
-                }
-                var targetInfo = getIndexInfoOfType(target, kind);
-                if (!targetInfo || ((targetInfo.type.flags & 1) && !(originalSource.flags & 16777726))) {
-                    return -1;
-                }
-                var sourceInfo = getIndexInfoOfType(source, kind) ||
-                    kind === 1 && getIndexInfoOfType(source, 0);
-                if (sourceInfo) {
-                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
-                }
-                if (isObjectLiteralType(source)) {
-                    var related = -1;
-                    if (kind === 0) {
-                        var sourceNumberInfo = getIndexInfoOfType(source, 1);
-                        if (sourceNumberInfo) {
-                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
-                        }
-                    }
-                    if (related) {
-                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
-                    }
-                    return related;
-                }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
-                }
-                return 0;
-            }
-            function indexTypesIdenticalTo(source, target, indexKind) {
-                var targetInfo = getIndexInfoOfType(target, indexKind);
-                var sourceInfo = getIndexInfoOfType(source, indexKind);
-                if (!sourceInfo && !targetInfo) {
-                    return -1;
-                }
-                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
-                    return isRelatedTo(sourceInfo.type, targetInfo.type);
-                }
-                return 0;
-            }
-            function enumRelatedTo(source, target, reportErrors) {
-                if (source.symbol.name !== target.symbol.name ||
-                    source.symbol.flags & 128 ||
-                    target.symbol.flags & 128) {
-                    return 0;
-                }
-                var targetEnumType = getTypeOfSymbol(target.symbol);
-                for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
-                    var property = _a[_i];
-                    if (property.flags & 8) {
-                        var targetProperty = getPropertyOfType(targetEnumType, property.name);
-                        if (!targetProperty || !(targetProperty.flags & 8)) {
-                            if (reportErrors) {
-                                reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, undefined, 128));
-                            }
-                            return 0;
-                        }
-                    }
-                }
-                return -1;
-            }
-            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
-                if (!sourceSignature.declaration || !targetSignature.declaration) {
-                    return true;
-                }
-                var sourceAccessibility = sourceSignature.declaration.flags & (8 | 16);
-                var targetAccessibility = targetSignature.declaration.flags & (8 | 16);
-                if (targetAccessibility === 8) {
-                    return true;
-                }
-                if (targetAccessibility === 16 && sourceAccessibility !== 8) {
-                    return true;
-                }
-                if (targetAccessibility !== 16 && !sourceAccessibility) {
-                    return true;
-                }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
-                }
-                return false;
-            }
-        }
-        function isAbstractConstructorType(type) {
-            if (type.flags & 65536) {
-                var symbol = type.symbol;
-                if (symbol && symbol.flags & 32) {
-                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
-                    if (declaration && declaration.flags & 128) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isDeeplyNestedGeneric(type, stack, depth) {
-            if (type.flags & (4096 | 131072) && depth >= 5) {
-                var symbol = type.symbol;
-                var count = 0;
-                for (var i = 0; i < depth; i++) {
-                    var t = stack[i];
-                    if (t.flags & (4096 | 131072) && t.symbol === symbol) {
-                        count++;
-                        if (count >= 5)
-                            return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isPropertyIdenticalTo(sourceProp, targetProp) {
-            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0;
-        }
-        function compareProperties(sourceProp, targetProp, compareTypes) {
-            if (sourceProp === targetProp) {
-                return -1;
-            }
-            var sourcePropAccessibility = getDeclarationFlagsFromSymbol(sourceProp) & (8 | 16);
-            var targetPropAccessibility = getDeclarationFlagsFromSymbol(targetProp) & (8 | 16);
-            if (sourcePropAccessibility !== targetPropAccessibility) {
-                return 0;
-            }
-            if (sourcePropAccessibility) {
-                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
-                    return 0;
-                }
-            }
-            else {
-                if ((sourceProp.flags & 536870912) !== (targetProp.flags & 536870912)) {
-                    return 0;
-                }
-            }
-            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
-                return 0;
-            }
-            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
-        }
-        function isMatchingSignature(source, target, partialMatch) {
-            if (source.parameters.length === target.parameters.length &&
-                source.minArgumentCount === target.minArgumentCount &&
-                source.hasRestParameter === target.hasRestParameter) {
-                return true;
-            }
-            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (source.hasRestParameter && !target.hasRestParameter ||
-                source.hasRestParameter === target.hasRestParameter && source.parameters.length >= target.parameters.length)) {
-                return true;
-            }
-            return false;
-        }
-        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
-            if (source === target) {
-                return -1;
-            }
-            if (!(isMatchingSignature(source, target, partialMatch))) {
-                return 0;
-            }
-            if ((source.typeParameters ? source.typeParameters.length : 0) !== (target.typeParameters ? target.typeParameters.length : 0)) {
-                return 0;
-            }
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1;
-            if (!ignoreThisTypes && source.thisType && target.thisType) {
-                var related = compareTypes(source.thisType, target.thisType);
-                if (!related) {
-                    return 0;
-                }
-                result &= related;
-            }
-            var targetLen = target.parameters.length;
-            for (var i = 0; i < targetLen; i++) {
-                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
-                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
-                var related = compareTypes(s, t);
-                if (!related) {
-                    return 0;
-                }
-                result &= related;
-            }
-            if (!ignoreReturnTypes) {
-                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
-            }
-            return result;
-        }
-        function isRestParameterIndex(signature, parameterIndex) {
-            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
-        }
-        function isSupertypeOfEach(candidate, types) {
-            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
-                var t = types_5[_i];
-                if (candidate !== t && !isTypeSubtypeOf(t, candidate))
-                    return false;
-            }
-            return true;
-        }
-        function getCombinedFlagsOfTypes(types) {
-            var flags = 0;
-            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
-                var t = types_6[_i];
-                flags |= t.flags;
-            }
-            return flags;
-        }
-        function getCommonSupertype(types) {
-            if (!strictNullChecks) {
-                return ts.forEach(types, function (t) { return isSupertypeOfEach(t, types) ? t : undefined; });
-            }
-            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 96); });
-            if (!primaryTypes.length) {
-                return getUnionType(types);
-            }
-            var supertype = ts.forEach(primaryTypes, function (t) { return isSupertypeOfEach(t, primaryTypes) ? t : undefined; });
-            return supertype && addNullableKind(supertype, getCombinedFlagsOfTypes(types) & 96);
-        }
-        function reportNoCommonSupertypeError(types, errorLocation, errorMessageChainHead) {
-            var bestSupertype;
-            var bestSupertypeDownfallType;
-            var bestSupertypeScore = 0;
-            for (var i = 0; i < types.length; i++) {
-                var score = 0;
-                var downfallType = undefined;
-                for (var j = 0; j < types.length; j++) {
-                    if (isTypeSubtypeOf(types[j], types[i])) {
-                        score++;
-                    }
-                    else if (!downfallType) {
-                        downfallType = types[j];
-                    }
-                }
-                ts.Debug.assert(!!downfallType, "If there is no common supertype, each type should have a downfallType");
-                if (score > bestSupertypeScore) {
-                    bestSupertype = types[i];
-                    bestSupertypeDownfallType = downfallType;
-                    bestSupertypeScore = score;
-                }
-                if (bestSupertypeScore === types.length - 1) {
-                    break;
-                }
-            }
-            checkTypeSubtypeOf(bestSupertypeDownfallType, bestSupertype, errorLocation, ts.Diagnostics.Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0, errorMessageChainHead);
-        }
-        function isArrayType(type) {
-            return type.flags & 4096 && type.target === globalArrayType;
-        }
-        function isArrayLikeType(type) {
-            return type.flags & 4096 && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
-                !(type.flags & 96) && isTypeAssignableTo(type, anyReadonlyArrayType);
-        }
-        function isTupleLikeType(type) {
-            return !!getPropertyOfType(type, "0");
-        }
-        function isStringLiteralType(type) {
-            return type.flags & 256;
-        }
-        function isTupleType(type) {
-            return !!(type.flags & 8192);
-        }
-        function getNullableKind(type) {
-            var flags = type.flags;
-            if (flags & 16384) {
-                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    flags |= t.flags;
-                }
-            }
-            return flags & 96;
-        }
-        function addNullableKind(type, kind) {
-            if ((getNullableKind(type) & kind) !== kind) {
-                var types = [type];
-                if (kind & 32) {
-                    types.push(undefinedType);
-                }
-                if (kind & 64) {
-                    types.push(nullType);
-                }
-                type = getUnionType(types);
-            }
-            return type;
-        }
-        function getNonNullableType(type) {
-            return strictNullChecks ? getTypeWithFacts(type, 524288) : type;
-        }
-        function isObjectLiteralType(type) {
-            return type.symbol && (type.symbol.flags & (4096 | 2048)) !== 0 &&
-                getSignaturesOfType(type, 0).length === 0 &&
-                getSignaturesOfType(type, 1).length === 0;
-        }
-        function createTransientSymbol(source, type) {
-            var symbol = createSymbol(source.flags | 67108864, source.name);
-            symbol.declarations = source.declarations;
-            symbol.parent = source.parent;
-            symbol.type = type;
-            symbol.target = source;
-            if (source.valueDeclaration) {
-                symbol.valueDeclaration = source.valueDeclaration;
-            }
-            return symbol;
-        }
-        function transformTypeOfMembers(type, f) {
-            var members = {};
-            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
-                var property = _a[_i];
-                var original = getTypeOfSymbol(property);
-                var updated = f(original);
-                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
-            }
-            ;
-            return members;
-        }
-        function getRegularTypeOfObjectLiteral(type) {
-            if (!(type.flags & 1048576)) {
-                return type;
-            }
-            var regularType = type.regularType;
-            if (regularType) {
-                return regularType;
-            }
-            var resolved = type;
-            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
-            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
-            regularNew.flags = resolved.flags & ~1048576;
-            type.regularType = regularNew;
-            return regularNew;
-        }
-        function getWidenedTypeOfObjectLiteral(type) {
-            var members = transformTypeOfMembers(type, function (prop) {
-                var widened = getWidenedType(prop);
-                return prop === widened ? prop : widened;
-            });
-            var stringIndexInfo = getIndexInfoOfType(type, 0);
-            var numberIndexInfo = getIndexInfoOfType(type, 1);
-            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
-        }
-        function getWidenedConstituentType(type) {
-            return type.flags & 96 ? type : getWidenedType(type);
-        }
-        function getWidenedType(type) {
-            if (type.flags & 6291456) {
-                if (type.flags & 96) {
-                    return anyType;
-                }
-                if (type.flags & 524288) {
-                    return getWidenedTypeOfObjectLiteral(type);
-                }
-                if (type.flags & 16384) {
-                    return getUnionType(ts.map(type.types, getWidenedConstituentType), true);
-                }
-                if (isArrayType(type)) {
-                    return createArrayType(getWidenedType(type.typeArguments[0]));
-                }
-                if (isTupleType(type)) {
-                    return createTupleType(ts.map(type.elementTypes, getWidenedType));
-                }
-            }
-            return type;
-        }
-        function reportWideningErrorsInType(type) {
-            var errorReported = false;
-            if (type.flags & 16384) {
-                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
-            }
-            if (isArrayType(type)) {
-                return reportWideningErrorsInType(type.typeArguments[0]);
-            }
-            if (isTupleType(type)) {
-                for (var _b = 0, _c = type.elementTypes; _b < _c.length; _b++) {
-                    var t = _c[_b];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
-            }
-            if (type.flags & 524288) {
-                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
-                    var p = _e[_d];
-                    var t = getTypeOfSymbol(p);
-                    if (t.flags & 2097152) {
-                        if (!reportWideningErrorsInType(t)) {
-                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
-                        }
-                        errorReported = true;
-                    }
-                }
-            }
-            return errorReported;
-        }
-        function reportImplicitAnyError(declaration, type) {
-            var typeAsString = typeToString(getWidenedType(type));
-            var diagnostic;
-            switch (declaration.kind) {
-                case 145:
-                case 144:
-                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
-                    break;
-                case 142:
-                    diagnostic = declaration.dotDotDotToken ?
-                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
-                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
-                    break;
-                case 169:
-                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
-                    break;
-                case 220:
-                case 147:
-                case 146:
-                case 149:
-                case 150:
-                case 179:
-                case 180:
-                    if (!declaration.name) {
-                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
-                        return;
-                    }
-                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
-                    break;
-                default:
-                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
-            }
-            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
-        }
-        function reportErrorsFromWidening(declaration, type) {
-            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & 2097152) {
-                if (!reportWideningErrorsInType(type)) {
-                    reportImplicitAnyError(declaration, type);
-                }
-            }
-        }
-        function forEachMatchingParameterType(source, target, callback) {
-            var sourceMax = source.parameters.length;
-            var targetMax = target.parameters.length;
-            var count;
-            if (source.hasRestParameter && target.hasRestParameter) {
-                count = Math.max(sourceMax, targetMax);
-            }
-            else if (source.hasRestParameter) {
-                count = targetMax;
-            }
-            else if (target.hasRestParameter) {
-                count = sourceMax;
-            }
-            else {
-                count = Math.min(sourceMax, targetMax);
-            }
-            for (var i = 0; i < count; i++) {
-                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
-            }
-        }
-        function createInferenceContext(typeParameters, inferUnionTypes) {
-            var inferences = ts.map(typeParameters, createTypeInferencesObject);
-            return {
-                typeParameters: typeParameters,
-                inferUnionTypes: inferUnionTypes,
-                inferences: inferences,
-                inferredTypes: new Array(typeParameters.length)
-            };
-        }
-        function createTypeInferencesObject() {
-            return {
-                primary: undefined,
-                secondary: undefined,
-                isFixed: false
-            };
-        }
-        function inferTypes(context, source, target) {
-            var sourceStack;
-            var targetStack;
-            var depth = 0;
-            var inferiority = 0;
-            var visited = {};
-            inferFromTypes(source, target);
-            function isInProcess(source, target) {
-                for (var i = 0; i < depth; i++) {
-                    if (source === sourceStack[i] && target === targetStack[i]) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function inferFromTypes(source, target) {
-                if (source.flags & 16384 && target.flags & 16384 ||
-                    source.flags & 32768 && target.flags & 32768) {
-                    var matchingTypes = void 0;
-                    for (var _i = 0, _a = target.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (typeIdenticalToSomeType(t, source.types)) {
-                            (matchingTypes || (matchingTypes = [])).push(t);
-                            inferFromTypes(t, t);
-                        }
-                    }
-                    if (matchingTypes) {
-                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
-                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
-                    }
-                }
-                if (target.flags & 512) {
-                    if (source.flags & 8388608) {
-                        return;
-                    }
-                    var typeParameters = context.typeParameters;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (target === typeParameters[i]) {
-                            var inferences = context.inferences[i];
-                            if (!inferences.isFixed) {
-                                var candidates = inferiority ?
-                                    inferences.secondary || (inferences.secondary = []) :
-                                    inferences.primary || (inferences.primary = []);
-                                if (!ts.contains(candidates, source)) {
-                                    candidates.push(source);
-                                }
-                            }
-                            return;
-                        }
-                    }
-                }
-                else if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
-                    var sourceTypes = source.typeArguments || emptyArray;
-                    var targetTypes = target.typeArguments || emptyArray;
-                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
-                    for (var i = 0; i < count; i++) {
-                        inferFromTypes(sourceTypes[i], targetTypes[i]);
-                    }
-                }
-                else if (source.flags & 8192 && target.flags & 8192 && source.elementTypes.length === target.elementTypes.length) {
-                    var sourceTypes = source.elementTypes;
-                    var targetTypes = target.elementTypes;
-                    for (var i = 0; i < sourceTypes.length; i++) {
-                        inferFromTypes(sourceTypes[i], targetTypes[i]);
-                    }
-                }
-                else if (target.flags & 49152) {
-                    var targetTypes = target.types;
-                    var typeParameterCount = 0;
-                    var typeParameter = void 0;
-                    for (var _b = 0, targetTypes_2 = targetTypes; _b < targetTypes_2.length; _b++) {
-                        var t = targetTypes_2[_b];
-                        if (t.flags & 512 && ts.contains(context.typeParameters, t)) {
-                            typeParameter = t;
-                            typeParameterCount++;
-                        }
-                        else {
-                            inferFromTypes(source, t);
-                        }
-                    }
-                    if (typeParameterCount === 1) {
-                        inferiority++;
-                        inferFromTypes(source, typeParameter);
-                        inferiority--;
-                    }
-                }
-                else if (source.flags & 49152) {
-                    var sourceTypes = source.types;
-                    for (var _c = 0, sourceTypes_3 = sourceTypes; _c < sourceTypes_3.length; _c++) {
-                        var sourceType = sourceTypes_3[_c];
-                        inferFromTypes(sourceType, target);
-                    }
-                }
-                else {
-                    source = getApparentType(source);
-                    if (source.flags & 80896 && (target.flags & 4096 && target.typeArguments ||
-                        target.flags & 8192 ||
-                        target.flags & 65536 && target.symbol && target.symbol.flags & (8192 | 2048 | 32))) {
-                        if (isInProcess(source, target)) {
-                            return;
-                        }
-                        if (isDeeplyNestedGeneric(source, sourceStack, depth) && isDeeplyNestedGeneric(target, targetStack, depth)) {
-                            return;
-                        }
-                        var key = source.id + "," + target.id;
-                        if (ts.hasProperty(visited, key)) {
-                            return;
-                        }
-                        visited[key] = true;
-                        if (depth === 0) {
-                            sourceStack = [];
-                            targetStack = [];
-                        }
-                        sourceStack[depth] = source;
-                        targetStack[depth] = target;
-                        depth++;
-                        inferFromProperties(source, target);
-                        inferFromSignatures(source, target, 0);
-                        inferFromSignatures(source, target, 1);
-                        inferFromIndexTypes(source, target);
-                        depth--;
-                    }
-                }
-            }
-            function inferFromProperties(source, target) {
-                var properties = getPropertiesOfObjectType(target);
-                for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
-                    var targetProp = properties_2[_i];
-                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
-                    if (sourceProp) {
-                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
-                    }
-                }
-            }
-            function inferFromSignatures(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                var sourceLen = sourceSignatures.length;
-                var targetLen = targetSignatures.length;
-                var len = sourceLen < targetLen ? sourceLen : targetLen;
-                for (var i = 0; i < len; i++) {
-                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
-                }
-            }
-            function inferFromSignature(source, target) {
-                forEachMatchingParameterType(source, target, inferFromTypes);
-                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
-                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
-                }
-                else {
-                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
-                }
-            }
-            function inferFromIndexTypes(source, target) {
-                var targetStringIndexType = getIndexTypeOfType(target, 0);
-                if (targetStringIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 0) ||
-                        getImplicitIndexTypeOfType(source, 0);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetStringIndexType);
-                    }
-                }
-                var targetNumberIndexType = getIndexTypeOfType(target, 1);
-                if (targetNumberIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 1) ||
-                        getIndexTypeOfType(source, 0) ||
-                        getImplicitIndexTypeOfType(source, 1);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetNumberIndexType);
-                    }
-                }
-            }
-        }
-        function typeIdenticalToSomeType(type, types) {
-            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
-                var t = types_7[_i];
-                if (isTypeIdenticalTo(t, type)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
-            var reducedTypes = [];
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (!typeIdenticalToSomeType(t, typesToRemove)) {
-                    reducedTypes.push(t);
-                }
-            }
-            return type.flags & 16384 ? getUnionType(reducedTypes, true) : getIntersectionType(reducedTypes);
-        }
-        function getInferenceCandidates(context, index) {
-            var inferences = context.inferences[index];
-            return inferences.primary || inferences.secondary || emptyArray;
-        }
-        function getInferredType(context, index) {
-            var inferredType = context.inferredTypes[index];
-            var inferenceSucceeded;
-            if (!inferredType) {
-                var inferences = getInferenceCandidates(context, index);
-                if (inferences.length) {
-                    var unionOrSuperType = context.inferUnionTypes ? getUnionType(inferences) : getCommonSupertype(inferences);
-                    inferredType = unionOrSuperType ? getWidenedType(unionOrSuperType) : unknownType;
-                    inferenceSucceeded = !!unionOrSuperType;
-                }
-                else {
-                    inferredType = emptyObjectType;
-                    inferenceSucceeded = true;
-                }
-                context.inferredTypes[index] = inferredType;
-                if (inferenceSucceeded) {
-                    var constraint = getConstraintOfTypeParameter(context.typeParameters[index]);
-                    if (constraint) {
-                        var instantiatedConstraint = instantiateType(constraint, getInferenceMapper(context));
-                        if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
-                            context.inferredTypes[index] = inferredType = instantiatedConstraint;
-                        }
-                    }
-                }
-                else if (context.failedTypeParameterIndex === undefined || context.failedTypeParameterIndex > index) {
-                    context.failedTypeParameterIndex = index;
-                }
-            }
-            return inferredType;
-        }
-        function getInferredTypes(context) {
-            for (var i = 0; i < context.inferredTypes.length; i++) {
-                getInferredType(context, i);
-            }
-            return context.inferredTypes;
-        }
-        function getResolvedSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 | 1048576, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol;
-            }
-            return links.resolvedSymbol;
-        }
-        function isInTypeQuery(node) {
-            while (node) {
-                switch (node.kind) {
-                    case 158:
-                        return true;
-                    case 69:
-                    case 139:
-                        node = node.parent;
-                        continue;
-                    default:
-                        return false;
-                }
-            }
-            ts.Debug.fail("should not get here");
-        }
-        function getFlowCacheKey(node) {
-            if (node.kind === 69) {
-                var symbol = getResolvedSymbol(node);
-                return symbol !== unknownSymbol ? "" + getSymbolId(symbol) : undefined;
-            }
-            if (node.kind === 97) {
-                return "0";
-            }
-            if (node.kind === 172) {
-                var key = getFlowCacheKey(node.expression);
-                return key && key + "." + node.name.text;
-            }
-            return undefined;
-        }
-        function isNullOrUndefinedLiteral(node) {
-            return node.kind === 93 ||
-                node.kind === 69 && getResolvedSymbol(node) === undefinedSymbol;
-        }
-        function getLeftmostIdentifierOrThis(node) {
-            switch (node.kind) {
-                case 69:
-                case 97:
-                    return node;
-                case 172:
-                    return getLeftmostIdentifierOrThis(node.expression);
-            }
-            return undefined;
-        }
-        function isMatchingReference(source, target) {
-            if (source.kind === target.kind) {
-                switch (source.kind) {
-                    case 69:
-                        return getResolvedSymbol(source) === getResolvedSymbol(target);
-                    case 97:
-                        return true;
-                    case 172:
-                        return source.name.text === target.name.text &&
-                            isMatchingReference(source.expression, target.expression);
-                }
-            }
-            return false;
-        }
-        function containsMatchingReference(source, target) {
-            while (source.kind === 172) {
-                source = source.expression;
-                if (isMatchingReference(source, target)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function isOrContainsMatchingReference(source, target) {
-            return isMatchingReference(source, target) || containsMatchingReference(source, target);
-        }
-        function hasMatchingArgument(callExpression, reference) {
-            if (callExpression.arguments) {
-                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
-                    var argument = _a[_i];
-                    if (isOrContainsMatchingReference(reference, argument)) {
-                        return true;
-                    }
-                }
-            }
-            if (callExpression.expression.kind === 172 &&
-                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
-                return true;
-            }
-            return false;
-        }
-        function getFlowNodeId(flow) {
-            if (!flow.id) {
-                flow.id = nextFlowId;
-                nextFlowId++;
-            }
-            return flow.id;
-        }
-        function typeMaybeAssignableTo(source, target) {
-            if (!(source.flags & 16384)) {
-                return isTypeAssignableTo(source, target);
-            }
-            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (isTypeAssignableTo(t, target)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function getAssignmentReducedType(declaredType, assignedType) {
-            if (declaredType !== assignedType && declaredType.flags & 16384) {
-                var reducedTypes = ts.filter(declaredType.types, function (t) { return typeMaybeAssignableTo(assignedType, t); });
-                if (reducedTypes.length) {
-                    return reducedTypes.length === 1 ? reducedTypes[0] : getUnionType(reducedTypes);
-                }
-            }
-            return declaredType;
-        }
-        function getTypeFacts(type) {
-            var flags = type.flags;
-            if (flags & 258) {
-                return strictNullChecks ? 4079361 : 4194049;
-            }
-            if (flags & 132) {
-                return strictNullChecks ? 4079234 : 4193922;
-            }
-            if (flags & 8) {
-                return strictNullChecks ? 4078980 : 4193668;
-            }
-            if (flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return resolved.callSignatures.length || resolved.constructSignatures.length || isTypeSubtypeOf(type, globalFunctionType) ?
-                    strictNullChecks ? 1970144 : 4181984 :
-                    strictNullChecks ? 1972176 : 4184016;
-            }
-            if (flags & (16 | 32)) {
-                return 2457472;
-            }
-            if (flags & 64) {
-                return 2340752;
-            }
-            if (flags & 16777216) {
-                return strictNullChecks ? 1981320 : 4193160;
-            }
-            if (flags & 512) {
-                var constraint = getConstraintOfTypeParameter(type);
-                return constraint ? getTypeFacts(constraint) : 4194303;
-            }
-            if (flags & 32768) {
-                return ts.reduceLeft(type.types, function (flags, type) { return flags |= getTypeFacts(type); }, 0);
-            }
-            return 4194303;
-        }
-        function getTypeWithFacts(type, include) {
-            if (!(type.flags & 16384)) {
-                return getTypeFacts(type) & include ? type : neverType;
-            }
-            var firstType;
-            var types;
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (getTypeFacts(t) & include) {
-                    if (!firstType) {
-                        firstType = t;
-                    }
-                    else {
-                        if (!types) {
-                            types = [firstType];
-                        }
-                        types.push(t);
-                    }
-                }
-            }
-            return firstType ? types ? getUnionType(types, true) : firstType : neverType;
-        }
-        function getTypeWithDefault(type, defaultExpression) {
-            if (defaultExpression) {
-                var defaultType = checkExpression(defaultExpression);
-                return getUnionType([getTypeWithFacts(type, 131072), defaultType]);
-            }
-            return type;
-        }
-        function getTypeOfDestructuredProperty(type, name) {
-            var text = getTextOfPropertyName(name);
-            return getTypeOfPropertyOfType(type, text) ||
-                isNumericLiteralName(text) && getIndexTypeOfType(type, 1) ||
-                getIndexTypeOfType(type, 0) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredArrayElement(type, index) {
-            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
-                checkIteratedTypeOrElementType(type, undefined, false) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredSpreadElement(type) {
-            return createArrayType(checkIteratedTypeOrElementType(type, undefined, false) || unknownType);
-        }
-        function getAssignedTypeOfBinaryExpression(node) {
-            return node.parent.kind === 170 || node.parent.kind === 253 ?
-                getTypeWithDefault(getAssignedType(node), node.right) :
-                checkExpression(node.right);
-        }
-        function getAssignedTypeOfArrayLiteralElement(node, element) {
-            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
-        }
-        function getAssignedTypeOfSpreadElement(node) {
-            return getTypeOfDestructuredSpreadElement(getAssignedType(node.parent));
-        }
-        function getAssignedTypeOfPropertyAssignment(node) {
-            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
-        }
-        function getAssignedTypeOfShorthandPropertyAssignment(node) {
-            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
-        }
-        function getAssignedType(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 207:
-                    return stringType;
-                case 208:
-                    return checkRightHandSideOfForOf(parent.expression) || unknownType;
-                case 187:
-                    return getAssignedTypeOfBinaryExpression(parent);
-                case 181:
-                    return undefinedType;
-                case 170:
-                    return getAssignedTypeOfArrayLiteralElement(parent, node);
-                case 191:
-                    return getAssignedTypeOfSpreadElement(parent);
-                case 253:
-                    return getAssignedTypeOfPropertyAssignment(parent);
-                case 254:
-                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
-            }
-            return unknownType;
-        }
-        function getInitialTypeOfBindingElement(node) {
-            var pattern = node.parent;
-            var parentType = getInitialType(pattern.parent);
-            var type = pattern.kind === 167 ?
-                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
-                !node.dotDotDotToken ?
-                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
-                    getTypeOfDestructuredSpreadElement(parentType);
-            return getTypeWithDefault(type, node.initializer);
-        }
-        function getTypeOfInitializer(node) {
-            var links = getNodeLinks(node);
-            return links.resolvedType || checkExpression(node);
-        }
-        function getInitialTypeOfVariableDeclaration(node) {
-            if (node.initializer) {
-                return getTypeOfInitializer(node.initializer);
-            }
-            if (node.parent.parent.kind === 207) {
-                return stringType;
-            }
-            if (node.parent.parent.kind === 208) {
-                return checkRightHandSideOfForOf(node.parent.parent.expression) || unknownType;
-            }
-            return unknownType;
-        }
-        function getInitialType(node) {
-            return node.kind === 218 ?
-                getInitialTypeOfVariableDeclaration(node) :
-                getInitialTypeOfBindingElement(node);
-        }
-        function getFlowTypeOfReference(reference, declaredType, assumeInitialized) {
-            var key;
-            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & 97793)) {
-                return declaredType;
-            }
-            var initialType = assumeInitialized ? declaredType : addNullableKind(declaredType, 32);
-            var visitedFlowStart = visitedFlowCount;
-            var result = getTypeAtFlowNode(reference.flowNode);
-            visitedFlowCount = visitedFlowStart;
-            if (reference.parent.kind === 196 && getTypeWithFacts(result, 524288) === neverType) {
-                return declaredType;
-            }
-            return result;
-            function getTypeAtFlowNode(flow) {
-                while (true) {
-                    if (flow.flags & 256) {
-                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
-                            if (visitedFlowNodes[i] === flow) {
-                                return visitedFlowTypes[i];
-                            }
-                        }
-                    }
-                    var type = void 0;
-                    if (flow.flags & 16) {
-                        type = getTypeAtFlowAssignment(flow);
-                        if (!type) {
-                            flow = flow.antecedent;
-                            continue;
-                        }
-                    }
-                    else if (flow.flags & 96) {
-                        type = getTypeAtFlowCondition(flow);
-                    }
-                    else if (flow.flags & 12) {
-                        if (flow.antecedents.length === 1) {
-                            flow = flow.antecedents[0];
-                            continue;
-                        }
-                        type = flow.flags & 4 ?
-                            getTypeAtFlowBranchLabel(flow) :
-                            getTypeAtFlowLoopLabel(flow);
-                    }
-                    else if (flow.flags & 1) {
-                        type = declaredType;
-                    }
-                    else {
-                        type = initialType;
-                    }
-                    if (flow.flags & 256) {
-                        visitedFlowNodes[visitedFlowCount] = flow;
-                        visitedFlowTypes[visitedFlowCount] = type;
-                        visitedFlowCount++;
-                    }
-                    return type;
-                }
-            }
-            function getTypeAtFlowAssignment(flow) {
-                var node = flow.node;
-                if ((node.kind === 218 || node.kind === 169) &&
-                    reference.kind === 69 &&
-                    getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(reference)) === getSymbolOfNode(node)) {
-                    return declaredType.flags & 16384 ?
-                        getAssignmentReducedType(declaredType, getInitialType(node)) :
-                        declaredType;
-                }
-                if (isMatchingReference(reference, node)) {
-                    return declaredType.flags & 16384 ?
-                        getAssignmentReducedType(declaredType, getAssignedType(node)) :
-                        declaredType;
-                }
-                if (containsMatchingReference(reference, node)) {
-                    return declaredType;
-                }
-                return undefined;
-            }
-            function getTypeAtFlowCondition(flow) {
-                var type = getTypeAtFlowNode(flow.antecedent);
-                if (type !== neverType) {
-                    var assumeTrue = (flow.flags & 32) !== 0;
-                    type = narrowType(type, flow.expression, assumeTrue);
-                    if (type === neverType) {
-                        type = narrowType(declaredType, flow.expression, assumeTrue);
-                    }
-                }
-                return type;
-            }
-            function getTypeAtFlowBranchLabel(flow) {
-                var antecedentTypes = [];
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    var type = getTypeAtFlowNode(antecedent);
-                    if (type === declaredType && declaredType === initialType) {
-                        return type;
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                }
-                return getUnionType(antecedentTypes);
-            }
-            function getTypeAtFlowLoopLabel(flow) {
-                var id = getFlowNodeId(flow);
-                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = {});
-                if (!key) {
-                    key = getFlowCacheKey(reference);
-                }
-                if (cache[key]) {
-                    return cache[key];
-                }
-                for (var i = flowLoopStart; i < flowLoopCount; i++) {
-                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key) {
-                        return getUnionType(flowLoopTypes[i]);
-                    }
-                }
-                var antecedentTypes = [];
-                flowLoopNodes[flowLoopCount] = flow;
-                flowLoopKeys[flowLoopCount] = key;
-                flowLoopTypes[flowLoopCount] = antecedentTypes;
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    flowLoopCount++;
-                    var type = getTypeAtFlowNode(antecedent);
-                    flowLoopCount--;
-                    if (cache[key]) {
-                        return cache[key];
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                    if (type === declaredType) {
-                        break;
-                    }
-                }
-                return cache[key] = getUnionType(antecedentTypes);
-            }
-            function narrowTypeByTruthiness(type, expr, assumeTrue) {
-                return isMatchingReference(reference, expr) ? getTypeWithFacts(type, assumeTrue ? 1048576 : 2097152) : type;
-            }
-            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
-                switch (expr.operatorToken.kind) {
-                    case 56:
-                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
-                    case 30:
-                    case 31:
-                    case 32:
-                    case 33:
-                        if (isNullOrUndefinedLiteral(expr.right)) {
-                            return narrowTypeByNullCheck(type, expr, assumeTrue);
-                        }
-                        if (expr.left.kind === 182 && expr.right.kind === 9) {
-                            return narrowTypeByTypeof(type, expr, assumeTrue);
-                        }
-                        break;
-                    case 91:
-                        return narrowTypeByInstanceof(type, expr, assumeTrue);
-                    case 24:
-                        return narrowType(type, expr.right, assumeTrue);
-                }
-                return type;
-            }
-            function narrowTypeByNullCheck(type, expr, assumeTrue) {
-                var operator = expr.operatorToken.kind;
-                if (operator === 31 || operator === 33) {
-                    assumeTrue = !assumeTrue;
-                }
-                if (!strictNullChecks || !isMatchingReference(reference, expr.left)) {
-                    return type;
-                }
-                var doubleEquals = operator === 30 || operator === 31;
-                var facts = doubleEquals ?
-                    assumeTrue ? 65536 : 524288 :
-                    expr.right.kind === 93 ?
-                        assumeTrue ? 32768 : 262144 :
-                        assumeTrue ? 16384 : 131072;
-                return getTypeWithFacts(type, facts);
-            }
-            function narrowTypeByTypeof(type, expr, assumeTrue) {
-                var left = expr.left;
-                var right = expr.right;
-                if (!isMatchingReference(reference, left.expression)) {
-                    if (containsMatchingReference(reference, left.expression)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                if (expr.operatorToken.kind === 31 ||
-                    expr.operatorToken.kind === 33) {
-                    assumeTrue = !assumeTrue;
-                }
-                if (assumeTrue && !(type.flags & 16384)) {
-                    var targetType = ts.getProperty(typeofTypesByName, right.text);
-                    if (targetType && isTypeSubtypeOf(targetType, type)) {
-                        return targetType;
-                    }
-                }
-                var facts = assumeTrue ?
-                    ts.getProperty(typeofEQFacts, right.text) || 64 :
-                    ts.getProperty(typeofNEFacts, right.text) || 8192;
-                return getTypeWithFacts(type, facts);
-            }
-            function narrowTypeByInstanceof(type, expr, assumeTrue) {
-                if (!isMatchingReference(reference, expr.left)) {
-                    if (containsMatchingReference(reference, expr.left)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                if (isTypeAny(type)) {
-                    return type;
-                }
-                var rightType = checkExpression(expr.right);
-                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
-                    return type;
-                }
-                var targetType;
-                var prototypeProperty = getPropertyOfType(rightType, "prototype");
-                if (prototypeProperty) {
-                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
-                    if (!isTypeAny(prototypePropertyType)) {
-                        targetType = prototypePropertyType;
-                    }
-                }
-                if (!targetType) {
-                    var constructSignatures = void 0;
-                    if (rightType.flags & 2048) {
-                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
-                    }
-                    else if (rightType.flags & 65536) {
-                        constructSignatures = getSignaturesOfType(rightType, 1);
-                    }
-                    if (constructSignatures && constructSignatures.length) {
-                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
-                    }
-                }
-                if (targetType) {
-                    return getNarrowedType(type, targetType, assumeTrue);
-                }
-                return type;
-            }
-            function getNarrowedType(type, candidate, assumeTrue) {
-                if (!assumeTrue) {
-                    return type.flags & 16384 ?
-                        getUnionType(ts.filter(type.types, function (t) { return !isTypeSubtypeOf(t, candidate); })) :
-                        type;
-                }
-                if (type.flags & 16384) {
-                    var assignableConstituents = ts.filter(type.types, function (t) { return isTypeAssignableTo(t, candidate); });
-                    if (assignableConstituents.length) {
-                        return getUnionType(assignableConstituents);
-                    }
-                }
-                var targetType = type.flags & 512 ? getApparentType(type) : type;
-                return isTypeAssignableTo(candidate, targetType) ? candidate :
-                    isTypeAssignableTo(type, candidate) ? type :
-                        neverType;
-            }
-            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
-                if (type.flags & 1 || !hasMatchingArgument(callExpression, reference)) {
-                    return type;
-                }
-                var signature = getResolvedSignature(callExpression);
-                var predicate = signature.typePredicate;
-                if (!predicate) {
-                    return type;
-                }
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    var predicateArgument = callExpression.arguments[predicate.parameterIndex];
-                    if (predicateArgument) {
-                        if (isMatchingReference(reference, predicateArgument)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, predicateArgument)) {
-                            return declaredType;
-                        }
-                    }
-                }
-                else {
-                    var invokedExpression = skipParenthesizedNodes(callExpression.expression);
-                    if (invokedExpression.kind === 173 || invokedExpression.kind === 172) {
-                        var accessExpression = invokedExpression;
-                        var possibleReference = skipParenthesizedNodes(accessExpression.expression);
-                        if (isMatchingReference(reference, possibleReference)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, possibleReference)) {
-                            return declaredType;
-                        }
-                    }
-                }
-                return type;
-            }
-            function narrowType(type, expr, assumeTrue) {
-                switch (expr.kind) {
-                    case 69:
-                    case 97:
-                    case 172:
-                        return narrowTypeByTruthiness(type, expr, assumeTrue);
-                    case 174:
-                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
-                    case 178:
-                        return narrowType(type, expr.expression, assumeTrue);
-                    case 187:
-                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
-                    case 185:
-                        if (expr.operator === 49) {
-                            return narrowType(type, expr.operand, !assumeTrue);
-                        }
-                        break;
-                }
-                return type;
-            }
-        }
-        function getTypeOfSymbolAtLocation(symbol, location) {
-            if (location.kind === 69) {
-                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
-                    location = location.parent;
-                }
-                if (ts.isExpression(location) && !ts.isAssignmentTarget(location)) {
-                    var type = checkExpression(location);
-                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
-                        return type;
-                    }
-                }
-            }
-            return getTypeOfSymbol(symbol);
-        }
-        function skipParenthesizedNodes(expression) {
-            while (expression.kind === 178) {
-                expression = expression.expression;
-            }
-            return expression;
-        }
-        function checkIdentifier(node) {
-            var symbol = getResolvedSymbol(node);
-            if (symbol === argumentsSymbol) {
-                var container = ts.getContainingFunction(node);
-                if (container.kind === 180) {
-                    if (languageVersion < 2) {
-                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
-                    }
-                }
-                if (node.flags & 33554432) {
-                    getNodeLinks(container).flags |= 8192;
-                }
-            }
-            if (symbol.flags & 8388608 && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
-                markAliasSymbolAsReferenced(symbol);
-            }
-            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
-            if (languageVersion === 2
-                && localOrExportSymbol.flags & 32
-                && localOrExportSymbol.valueDeclaration.kind === 221
-                && ts.nodeIsDecorated(localOrExportSymbol.valueDeclaration)) {
-                var container = ts.getContainingClass(node);
-                while (container !== undefined) {
-                    if (container === localOrExportSymbol.valueDeclaration && container.name !== node) {
-                        getNodeLinks(container).flags |= 524288;
-                        getNodeLinks(node).flags |= 1048576;
-                        break;
-                    }
-                    container = ts.getContainingClass(container);
-                }
-            }
-            checkCollisionWithCapturedSuperVariable(node, node);
-            checkCollisionWithCapturedThisVariable(node, node);
-            checkNestedBlockScopedBinding(node, symbol);
-            var type = getTypeOfSymbol(localOrExportSymbol);
-            if (!(localOrExportSymbol.flags & 3) || ts.isAssignmentTarget(node)) {
-                return type;
-            }
-            var declaration = localOrExportSymbol.valueDeclaration;
-            var assumeInitialized = !strictNullChecks || (type.flags & 1) !== 0 || !declaration ||
-                ts.getRootDeclaration(declaration).kind === 142 || ts.isInAmbientContext(declaration) ||
-                ts.getContainingFunctionOrModule(declaration) !== ts.getContainingFunctionOrModule(node);
-            var flowType = getFlowTypeOfReference(node, type, assumeInitialized);
-            if (!assumeInitialized && !(getNullableKind(type) & 32) && getNullableKind(flowType) & 32) {
-                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
-                return type;
-            }
-            return flowType;
-        }
-        function isInsideFunction(node, threshold) {
-            var current = node;
-            while (current && current !== threshold) {
-                if (ts.isFunctionLike(current)) {
-                    return true;
-                }
-                current = current.parent;
-            }
-            return false;
-        }
-        function checkNestedBlockScopedBinding(node, symbol) {
-            if (languageVersion >= 2 ||
-                (symbol.flags & (2 | 32)) === 0 ||
-                symbol.valueDeclaration.parent.kind === 252) {
-                return;
-            }
-            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-            var usedInFunction = isInsideFunction(node.parent, container);
-            var current = container;
-            var containedInIterationStatement = false;
-            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
-                if (ts.isIterationStatement(current, false)) {
-                    containedInIterationStatement = true;
-                    break;
-                }
-                current = current.parent;
-            }
-            if (containedInIterationStatement) {
-                if (usedInFunction) {
-                    getNodeLinks(current).flags |= 65536;
-                }
-                if (container.kind === 206 &&
-                    ts.getAncestor(symbol.valueDeclaration, 219).parent === container &&
-                    isAssignedInBodyOfForStatement(node, container)) {
-                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152;
-                }
-                getNodeLinks(symbol.valueDeclaration).flags |= 262144;
-            }
-            if (usedInFunction) {
-                getNodeLinks(symbol.valueDeclaration).flags |= 131072;
-            }
-        }
-        function isAssignedInBodyOfForStatement(node, container) {
-            var current = node;
-            while (current.parent.kind === 178) {
-                current = current.parent;
-            }
-            var isAssigned = false;
-            if (ts.isAssignmentTarget(current)) {
-                isAssigned = true;
-            }
-            else if ((current.parent.kind === 185 || current.parent.kind === 186)) {
-                var expr = current.parent;
-                isAssigned = expr.operator === 41 || expr.operator === 42;
-            }
-            if (!isAssigned) {
-                return false;
-            }
-            while (current !== container) {
-                if (current === container.statement) {
-                    return true;
-                }
-                else {
-                    current = current.parent;
-                }
-            }
-            return false;
-        }
-        function captureLexicalThis(node, container) {
-            getNodeLinks(node).flags |= 2;
-            if (container.kind === 145 || container.kind === 148) {
-                var classNode = container.parent;
-                getNodeLinks(classNode).flags |= 4;
-            }
-            else {
-                getNodeLinks(container).flags |= 4;
-            }
-        }
-        function findFirstSuperCall(n) {
-            if (ts.isSuperCallExpression(n)) {
-                return n;
-            }
-            else if (ts.isFunctionLike(n)) {
-                return undefined;
-            }
-            return ts.forEachChild(n, findFirstSuperCall);
-        }
-        function getSuperCallInConstructor(constructor) {
-            var links = getNodeLinks(constructor);
-            if (links.hasSuperCall === undefined) {
-                links.superCall = findFirstSuperCall(constructor.body);
-                links.hasSuperCall = links.superCall ? true : false;
-            }
-            return links.superCall;
-        }
-        function classDeclarationExtendsNull(classDecl) {
-            var classSymbol = getSymbolOfNode(classDecl);
-            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
-            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
-            return baseConstructorType === nullType;
-        }
-        function checkThisExpression(node) {
-            var container = ts.getThisContainer(node, true);
-            var needToCaptureLexicalThis = false;
-            if (container.kind === 148) {
-                var containingClassDecl = container.parent;
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
-                if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
-                    var superCall = getSuperCallInConstructor(container);
-                    if (!superCall || superCall.end > node.pos) {
-                        error(node, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
-                    }
-                }
-            }
-            if (container.kind === 180) {
-                container = ts.getThisContainer(container, false);
-                needToCaptureLexicalThis = (languageVersion < 2);
-            }
-            switch (container.kind) {
-                case 225:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
-                    break;
-                case 224:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
-                    break;
-                case 148:
-                    if (isInConstructorArgumentInitializer(node, container)) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
-                    }
-                    break;
-                case 145:
-                case 144:
-                    if (container.flags & 32) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
-                    }
-                    break;
-                case 140:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
-                    break;
-            }
-            if (needToCaptureLexicalThis) {
-                captureLexicalThis(node, container);
-            }
-            if (ts.isFunctionLike(container)) {
-                if (container.kind === 179 &&
-                    ts.isInJavaScriptFile(container.parent) &&
-                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3) {
-                    var className = container.parent
-                        .left
-                        .expression
-                        .expression;
-                    var classSymbol = checkExpression(className).symbol;
-                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16)) {
-                        return getInferredClassType(classSymbol);
-                    }
-                }
-                var type = getContextuallyTypedThisType(container);
-                if (type) {
-                    return type;
-                }
-                var signature = getSignatureFromDeclaration(container);
-                if (signature.thisType) {
-                    return signature.thisType;
-                }
-            }
-            if (ts.isClassLike(container.parent)) {
-                var symbol = getSymbolOfNode(container.parent);
-                var type = container.flags & 32 ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
-                return getFlowTypeOfReference(node, type, true);
-            }
-            if (ts.isInJavaScriptFile(node)) {
-                var type = getTypeForThisExpressionFromJSDoc(container);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            if (compilerOptions.noImplicitThis) {
-                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
-            }
-            return anyType;
-        }
-        function getTypeForThisExpressionFromJSDoc(node) {
-            var typeTag = ts.getJSDocTypeTag(node);
-            if (typeTag && typeTag.typeExpression && typeTag.typeExpression.type && typeTag.typeExpression.type.kind === 269) {
-                var jsDocFunctionType = typeTag.typeExpression.type;
-                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 272) {
-                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
-                }
-            }
-        }
-        function isInConstructorArgumentInitializer(node, constructorDecl) {
-            for (var n = node; n && n !== constructorDecl; n = n.parent) {
-                if (n.kind === 142) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function checkSuperExpression(node) {
-            var isCallExpression = node.parent.kind === 174 && node.parent.expression === node;
-            var container = ts.getSuperContainer(node, true);
-            var needToCaptureLexicalThis = false;
-            if (!isCallExpression) {
-                while (container && container.kind === 180) {
-                    container = ts.getSuperContainer(container, true);
-                    needToCaptureLexicalThis = languageVersion < 2;
-                }
-            }
-            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
-            var nodeCheckFlag = 0;
-            if (!canUseSuperExpression) {
-                var current = node;
-                while (current && current !== container && current.kind !== 140) {
-                    current = current.parent;
-                }
-                if (current && current.kind === 140) {
-                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
-                }
-                else if (isCallExpression) {
-                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
-                }
-                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 171)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
-                }
-                else {
-                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
-                }
-                return unknownType;
-            }
-            if ((container.flags & 32) || isCallExpression) {
-                nodeCheckFlag = 512;
-            }
-            else {
-                nodeCheckFlag = 256;
-            }
-            getNodeLinks(node).flags |= nodeCheckFlag;
-            if (container.kind === 147 && container.flags & 256) {
-                if (ts.isSuperPropertyOrElementAccess(node.parent) && ts.isAssignmentTarget(node.parent)) {
-                    getNodeLinks(container).flags |= 4096;
-                }
-                else {
-                    getNodeLinks(container).flags |= 2048;
-                }
-            }
-            if (needToCaptureLexicalThis) {
-                captureLexicalThis(node.parent, container);
-            }
-            if (container.parent.kind === 171) {
-                if (languageVersion < 2) {
-                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
-                    return unknownType;
-                }
-                else {
-                    return anyType;
-                }
-            }
-            var classLikeDeclaration = container.parent;
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
-            var baseClassType = classType && getBaseTypes(classType)[0];
-            if (!baseClassType) {
-                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
-                }
-                return unknownType;
-            }
-            if (container.kind === 148 && isInConstructorArgumentInitializer(node, container)) {
-                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
-                return unknownType;
-            }
-            return nodeCheckFlag === 512
-                ? getBaseConstructorTypeOfClass(classType)
-                : getTypeWithThisArgument(baseClassType, classType.thisType);
-            function isLegalUsageOfSuperExpression(container) {
-                if (!container) {
-                    return false;
-                }
-                if (isCallExpression) {
-                    return container.kind === 148;
-                }
-                else {
-                    if (ts.isClassLike(container.parent) || container.parent.kind === 171) {
-                        if (container.flags & 32) {
-                            return container.kind === 147 ||
-                                container.kind === 146 ||
-                                container.kind === 149 ||
-                                container.kind === 150;
-                        }
-                        else {
-                            return container.kind === 147 ||
-                                container.kind === 146 ||
-                                container.kind === 149 ||
-                                container.kind === 150 ||
-                                container.kind === 145 ||
-                                container.kind === 144 ||
-                                container.kind === 148;
-                        }
-                    }
-                }
-                return false;
-            }
-        }
-        function getContextuallyTypedThisType(func) {
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func) && func.kind !== 180) {
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    return contextualSignature.thisType;
-                }
-            }
-            return undefined;
-        }
-        function getContextuallyTypedParameterType(parameter) {
-            var func = parameter.parent;
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
-                var iife = getImmediatelyInvokedFunctionExpression(func);
-                if (iife) {
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
-                        if (parameter.dotDotDotToken) {
-                            var restTypes = [];
-                            for (var i = indexOfParameter; i < iife.arguments.length; i++) {
-                                restTypes.push(getTypeOfExpression(iife.arguments[i]));
-                            }
-                            return createArrayType(getUnionType(restTypes));
-                        }
-                        var links = getNodeLinks(iife);
-                        var cached = links.resolvedSignature;
-                        links.resolvedSignature = anySignature;
-                        var type = checkExpression(iife.arguments[indexOfParameter]);
-                        links.resolvedSignature = cached;
-                        return type;
-                    }
-                }
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    var funcHasRestParameters = ts.hasRestParameter(func);
-                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (indexOfParameter < len) {
-                        return getTypeAtPosition(contextualSignature, indexOfParameter);
-                    }
-                    if (funcHasRestParameters &&
-                        indexOfParameter === (func.parameters.length - 1) &&
-                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
-                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
-                    }
-                }
-            }
-            return undefined;
-        }
-        function getImmediatelyInvokedFunctionExpression(func) {
-            if (isFunctionExpressionOrArrowFunction(func)) {
-                var prev = func;
-                var parent_8 = func.parent;
-                while (parent_8.kind === 178) {
-                    prev = parent_8;
-                    parent_8 = parent_8.parent;
-                }
-                if (parent_8.kind === 174 && parent_8.expression === prev) {
-                    return parent_8;
-                }
-            }
-        }
-        function getContextualTypeForInitializerExpression(node) {
-            var declaration = node.parent;
-            if (node === declaration.initializer) {
-                if (declaration.type) {
-                    return getTypeFromTypeNode(declaration.type);
-                }
-                if (declaration.kind === 142) {
-                    var type = getContextuallyTypedParameterType(declaration);
-                    if (type) {
-                        return type;
-                    }
-                }
-                if (ts.isBindingPattern(declaration.name)) {
-                    return getTypeFromBindingPattern(declaration.name, true);
-                }
-                if (ts.isBindingPattern(declaration.parent)) {
-                    var parentDeclaration = declaration.parent.parent;
-                    var name_11 = declaration.propertyName || declaration.name;
-                    if (ts.isVariableLike(parentDeclaration) &&
-                        parentDeclaration.type &&
-                        !ts.isBindingPattern(name_11)) {
-                        var text = getTextOfPropertyName(name_11);
-                        if (text) {
-                            return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text);
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function getContextualTypeForReturnExpression(node) {
-            var func = ts.getContainingFunction(node);
-            if (func && !func.asteriskToken) {
-                return getContextualReturnType(func);
-            }
-            return undefined;
-        }
-        function getContextualTypeForYieldOperand(node) {
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var contextualReturnType = getContextualReturnType(func);
-                if (contextualReturnType) {
-                    return node.asteriskToken
-                        ? contextualReturnType
-                        : getElementTypeOfIterableIterator(contextualReturnType);
-                }
-            }
-            return undefined;
-        }
-        function isInParameterInitializerBeforeContainingFunction(node) {
-            while (node.parent && !ts.isFunctionLike(node.parent)) {
-                if (node.parent.kind === 142 && node.parent.initializer === node) {
-                    return true;
-                }
-                node = node.parent;
-            }
-            return false;
-        }
-        function getContextualReturnType(functionDecl) {
-            if (functionDecl.type ||
-                functionDecl.kind === 148 ||
-                functionDecl.kind === 149 && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(functionDecl.symbol, 150))) {
-                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
-            }
-            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
-            if (signature) {
-                return getReturnTypeOfSignature(signature);
-            }
-            return undefined;
-        }
-        function getContextualTypeForArgument(callTarget, arg) {
-            var args = getEffectiveCallArguments(callTarget);
-            var argIndex = ts.indexOf(args, arg);
-            if (argIndex >= 0) {
-                var signature = getResolvedOrAnySignature(callTarget);
-                return getTypeAtPosition(signature, argIndex);
-            }
-            return undefined;
-        }
-        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
-            if (template.parent.kind === 176) {
-                return getContextualTypeForArgument(template.parent, substitutionExpression);
-            }
-            return undefined;
-        }
-        function getContextualTypeForBinaryOperand(node) {
-            var binaryExpression = node.parent;
-            var operator = binaryExpression.operatorToken.kind;
-            if (operator >= 56 && operator <= 68) {
-                if (node === binaryExpression.right) {
-                    return checkExpression(binaryExpression.left);
-                }
-            }
-            else if (operator === 52) {
-                var type = getContextualType(binaryExpression);
-                if (!type && node === binaryExpression.right) {
-                    type = checkExpression(binaryExpression.left);
-                }
-                return type;
-            }
-            else if (operator === 51 || operator === 24) {
-                if (node === binaryExpression.right) {
-                    return getContextualType(binaryExpression);
-                }
-            }
-            return undefined;
-        }
-        function applyToContextualType(type, mapper) {
-            if (!(type.flags & 16384)) {
-                return mapper(type);
-            }
-            var types = type.types;
-            var mappedType;
-            var mappedTypes;
-            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
-                var current = types_8[_i];
-                var t = mapper(current);
-                if (t) {
-                    if (!mappedType) {
-                        mappedType = t;
-                    }
-                    else if (!mappedTypes) {
-                        mappedTypes = [mappedType, t];
-                    }
-                    else {
-                        mappedTypes.push(t);
-                    }
-                }
-            }
-            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
-        }
-        function getTypeOfPropertyOfContextualType(type, name) {
-            return applyToContextualType(type, function (t) {
-                var prop = t.flags & 130048 ? getPropertyOfType(t, name) : undefined;
-                return prop ? getTypeOfSymbol(prop) : undefined;
-            });
-        }
-        function getIndexTypeOfContextualType(type, kind) {
-            return applyToContextualType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
-        }
-        function contextualTypeIsStringLiteralType(type) {
-            return !!(type.flags & 16384 ? ts.forEach(type.types, isStringLiteralType) : isStringLiteralType(type));
-        }
-        function contextualTypeIsTupleLikeType(type) {
-            return !!(type.flags & 16384 ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
-        }
-        function getContextualTypeForObjectLiteralMethod(node) {
-            ts.Debug.assert(ts.isObjectLiteralMethod(node));
-            if (isInsideWithStatementBody(node)) {
-                return undefined;
-            }
-            return getContextualTypeForObjectLiteralElement(node);
-        }
-        function getContextualTypeForObjectLiteralElement(element) {
-            var objectLiteral = element.parent;
-            var type = getApparentTypeOfContextualType(objectLiteral);
-            if (type) {
-                if (!ts.hasDynamicName(element)) {
-                    var symbolName = getSymbolOfNode(element).name;
-                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
-                    if (propertyType) {
-                        return propertyType;
-                    }
-                }
-                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1) ||
-                    getIndexTypeOfContextualType(type, 0);
-            }
-            return undefined;
-        }
-        function getContextualTypeForElementExpression(node) {
-            var arrayLiteral = node.parent;
-            var type = getApparentTypeOfContextualType(arrayLiteral);
-            if (type) {
-                var index = ts.indexOf(arrayLiteral.elements, node);
-                return getTypeOfPropertyOfContextualType(type, "" + index)
-                    || getIndexTypeOfContextualType(type, 1)
-                    || (languageVersion >= 2 ? getElementTypeOfIterable(type, undefined) : undefined);
-            }
-            return undefined;
-        }
-        function getContextualTypeForConditionalOperand(node) {
-            var conditional = node.parent;
-            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
-        }
-        function getContextualTypeForJsxAttribute(attribute) {
-            var kind = attribute.kind;
-            var jsxElement = attribute.parent;
-            var attrsType = getJsxElementAttributesType(jsxElement);
-            if (attribute.kind === 246) {
-                if (!attrsType || isTypeAny(attrsType)) {
-                    return undefined;
-                }
-                return getTypeOfPropertyOfType(attrsType, attribute.name.text);
-            }
-            else if (attribute.kind === 247) {
-                return attrsType;
-            }
-            ts.Debug.fail("Expected JsxAttribute or JsxSpreadAttribute, got ts.SyntaxKind[" + kind + "]");
-        }
-        function getApparentTypeOfContextualType(node) {
-            var type = getContextualType(node);
-            return type && getApparentType(type);
-        }
-        function getContextualType(node) {
-            if (isInsideWithStatementBody(node)) {
-                return undefined;
-            }
-            if (node.contextualType) {
-                return node.contextualType;
-            }
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 218:
-                case 142:
-                case 145:
-                case 144:
-                case 169:
-                    return getContextualTypeForInitializerExpression(node);
-                case 180:
-                case 211:
-                    return getContextualTypeForReturnExpression(node);
-                case 190:
-                    return getContextualTypeForYieldOperand(parent);
-                case 174:
-                case 175:
-                    return getContextualTypeForArgument(parent, node);
-                case 177:
-                case 195:
-                    return getTypeFromTypeNode(parent.type);
-                case 187:
-                    return getContextualTypeForBinaryOperand(node);
-                case 253:
-                    return getContextualTypeForObjectLiteralElement(parent);
-                case 170:
-                    return getContextualTypeForElementExpression(node);
-                case 188:
-                    return getContextualTypeForConditionalOperand(node);
-                case 197:
-                    ts.Debug.assert(parent.parent.kind === 189);
-                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
-                case 178:
-                    return getContextualType(parent);
-                case 248:
-                    return getContextualType(parent);
-                case 246:
-                case 247:
-                    return getContextualTypeForJsxAttribute(parent);
-            }
-            return undefined;
-        }
-        function getNonGenericSignature(type) {
-            var signatures = getSignaturesOfStructuredType(type, 0);
-            if (signatures.length === 1) {
-                var signature = signatures[0];
-                if (!signature.typeParameters) {
-                    return signature;
-                }
-            }
-        }
-        function isFunctionExpressionOrArrowFunction(node) {
-            return node.kind === 179 || node.kind === 180;
-        }
-        function getContextualSignatureForFunctionLikeDeclaration(node) {
-            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
-                ? getContextualSignature(node)
-                : undefined;
-        }
-        function getContextualTypeForFunctionLikeDeclaration(node) {
-            return ts.isObjectLiteralMethod(node) ?
-                getContextualTypeForObjectLiteralMethod(node) :
-                getApparentTypeOfContextualType(node);
-        }
-        function getContextualSignature(node) {
-            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
-            var type = getContextualTypeForFunctionLikeDeclaration(node);
-            if (!type) {
-                return undefined;
-            }
-            if (!(type.flags & 16384)) {
-                return getNonGenericSignature(type);
-            }
-            var signatureList;
-            var types = type.types;
-            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
-                var current = types_9[_i];
-                var signature = getNonGenericSignature(current);
-                if (signature) {
-                    if (!signatureList) {
-                        signatureList = [signature];
-                    }
-                    else if (!compareSignaturesIdentical(signatureList[0], signature, false, true, true, compareTypesIdentical)) {
-                        return undefined;
-                    }
-                    else {
-                        signatureList.push(signature);
-                    }
-                }
-            }
-            var result;
-            if (signatureList) {
-                result = cloneSignature(signatureList[0]);
-                result.resolvedReturnType = undefined;
-                result.unionSignatures = signatureList;
-            }
-            return result;
-        }
-        function isInferentialContext(mapper) {
-            return mapper && mapper.context;
-        }
-        function checkSpreadElementExpression(node, contextualMapper) {
-            var arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
-            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, false);
-        }
-        function hasDefaultValue(node) {
-            return (node.kind === 169 && !!node.initializer) ||
-                (node.kind === 187 && node.operatorToken.kind === 56);
-        }
-        function checkArrayLiteral(node, contextualMapper) {
-            var elements = node.elements;
-            var hasSpreadElement = false;
-            var elementTypes = [];
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
-            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
-                var e = elements_1[_i];
-                if (inDestructuringPattern && e.kind === 191) {
-                    var restArrayType = checkExpression(e.expression, contextualMapper);
-                    var restElementType = getIndexTypeOfType(restArrayType, 1) ||
-                        (languageVersion >= 2 ? getElementTypeOfIterable(restArrayType, undefined) : undefined);
-                    if (restElementType) {
-                        elementTypes.push(restElementType);
-                    }
-                }
-                else {
-                    var type = checkExpression(e, contextualMapper);
-                    elementTypes.push(type);
-                }
-                hasSpreadElement = hasSpreadElement || e.kind === 191;
-            }
-            if (!hasSpreadElement) {
-                if (inDestructuringPattern && elementTypes.length) {
-                    var type = createNewTupleType(elementTypes);
-                    type.pattern = node;
-                    return type;
-                }
-                var contextualType = getApparentTypeOfContextualType(node);
-                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
-                    var pattern = contextualType.pattern;
-                    if (pattern && (pattern.kind === 168 || pattern.kind === 170)) {
-                        var patternElements = pattern.elements;
-                        for (var i = elementTypes.length; i < patternElements.length; i++) {
-                            var patternElement = patternElements[i];
-                            if (hasDefaultValue(patternElement)) {
-                                elementTypes.push(contextualType.elementTypes[i]);
-                            }
-                            else {
-                                if (patternElement.kind !== 193) {
-                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
-                                }
-                                elementTypes.push(unknownType);
-                            }
-                        }
-                    }
-                    if (elementTypes.length) {
-                        return createTupleType(elementTypes);
-                    }
-                }
-            }
-            return createArrayType(elementTypes.length ? getUnionType(elementTypes) : emptyArrayElementType);
-        }
-        function isNumericName(name) {
-            return name.kind === 140 ? isNumericComputedName(name) : isNumericLiteralName(name.text);
-        }
-        function isNumericComputedName(name) {
-            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 132);
-        }
-        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
-            return isTypeAny(type) || isTypeOfKind(type, kind);
-        }
-        function isNumericLiteralName(name) {
-            return (+name).toString() === name;
-        }
-        function checkComputedPropertyName(node) {
-            var links = getNodeLinks(node.expression);
-            if (!links.resolvedType) {
-                links.resolvedType = checkExpression(node.expression);
-                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 132 | 258 | 16777216)) {
-                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
-                }
-                else {
-                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, true);
-                }
-            }
-            return links.resolvedType;
-        }
-        function getObjectLiteralIndexInfo(node, properties, kind) {
-            var propTypes = [];
-            for (var i = 0; i < properties.length; i++) {
-                if (kind === 0 || isNumericName(node.properties[i].name)) {
-                    propTypes.push(getTypeOfSymbol(properties[i]));
-                }
-            }
-            var unionType = propTypes.length ? getUnionType(propTypes) : undefinedType;
-            return createIndexInfo(unionType, false);
-        }
-        function checkObjectLiteral(node, contextualMapper) {
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
-            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
-            var propertiesTable = {};
-            var propertiesArray = [];
-            var contextualType = getApparentTypeOfContextualType(node);
-            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
-                (contextualType.pattern.kind === 167 || contextualType.pattern.kind === 171);
-            var typeFlags = 0;
-            var patternWithComputedProperties = false;
-            var hasComputedStringProperty = false;
-            var hasComputedNumberProperty = false;
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var memberDecl = _a[_i];
-                var member = memberDecl.symbol;
-                if (memberDecl.kind === 253 ||
-                    memberDecl.kind === 254 ||
-                    ts.isObjectLiteralMethod(memberDecl)) {
-                    var type = void 0;
-                    if (memberDecl.kind === 253) {
-                        type = checkPropertyAssignment(memberDecl, contextualMapper);
-                    }
-                    else if (memberDecl.kind === 147) {
-                        type = checkObjectLiteralMethod(memberDecl, contextualMapper);
-                    }
-                    else {
-                        ts.Debug.assert(memberDecl.kind === 254);
-                        type = checkExpression(memberDecl.name, contextualMapper);
-                    }
-                    typeFlags |= type.flags;
-                    var prop = createSymbol(4 | 67108864 | member.flags, member.name);
-                    if (inDestructuringPattern) {
-                        var isOptional = (memberDecl.kind === 253 && hasDefaultValue(memberDecl.initializer)) ||
-                            (memberDecl.kind === 254 && memberDecl.objectAssignmentInitializer);
-                        if (isOptional) {
-                            prop.flags |= 536870912;
-                        }
-                        if (ts.hasDynamicName(memberDecl)) {
-                            patternWithComputedProperties = true;
-                        }
-                    }
-                    else if (contextualTypeHasPattern && !(contextualType.flags & 67108864)) {
-                        var impliedProp = getPropertyOfType(contextualType, member.name);
-                        if (impliedProp) {
-                            prop.flags |= impliedProp.flags & 536870912;
-                        }
-                        else if (!compilerOptions.suppressExcessPropertyErrors) {
-                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
-                        }
-                    }
-                    prop.declarations = member.declarations;
-                    prop.parent = member.parent;
-                    if (member.valueDeclaration) {
-                        prop.valueDeclaration = member.valueDeclaration;
-                    }
-                    prop.type = type;
-                    prop.target = member;
-                    member = prop;
-                }
-                else {
-                    ts.Debug.assert(memberDecl.kind === 149 || memberDecl.kind === 150);
-                    checkAccessorDeclaration(memberDecl);
-                }
-                if (ts.hasDynamicName(memberDecl)) {
-                    if (isNumericName(memberDecl.name)) {
-                        hasComputedNumberProperty = true;
-                    }
-                    else {
-                        hasComputedStringProperty = true;
-                    }
-                }
-                else {
-                    propertiesTable[member.name] = member;
-                }
-                propertiesArray.push(member);
-            }
-            if (contextualTypeHasPattern) {
-                for (var _b = 0, _c = getPropertiesOfType(contextualType); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    if (!ts.hasProperty(propertiesTable, prop.name)) {
-                        if (!(prop.flags & 536870912)) {
-                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
-                        }
-                        propertiesTable[prop.name] = prop;
-                        propertiesArray.push(prop);
-                    }
-                }
-            }
-            var stringIndexInfo = hasComputedStringProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 0) : undefined;
-            var numberIndexInfo = hasComputedNumberProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 1) : undefined;
-            var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
-            var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576;
-            result.flags |= 524288 | 4194304 | freshObjectLiteralFlag | (typeFlags & 14680064) | (patternWithComputedProperties ? 67108864 : 0);
-            if (inDestructuringPattern) {
-                result.pattern = node;
-            }
-            return result;
-        }
-        function checkJsxSelfClosingElement(node) {
-            checkJsxOpeningLikeElement(node);
-            return jsxElementType || anyType;
-        }
-        function checkJsxElement(node) {
-            checkJsxOpeningLikeElement(node.openingElement);
-            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
-                getIntrinsicTagSymbol(node.closingElement);
-            }
-            else {
-                checkExpression(node.closingElement.tagName);
-            }
-            for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
-                var child = _a[_i];
-                switch (child.kind) {
-                    case 248:
-                        checkJsxExpression(child);
-                        break;
-                    case 241:
-                        checkJsxElement(child);
-                        break;
-                    case 242:
-                        checkJsxSelfClosingElement(child);
-                        break;
-                }
-            }
-            return jsxElementType || anyType;
-        }
-        function isUnhyphenatedJsxName(name) {
-            return name.indexOf("-") < 0;
-        }
-        function isJsxIntrinsicIdentifier(tagName) {
-            if (tagName.kind === 139) {
-                return false;
-            }
-            else {
-                return ts.isIntrinsicJsxName(tagName.text);
-            }
-        }
-        function checkJsxAttribute(node, elementAttributesType, nameTable) {
-            var correspondingPropType = undefined;
-            if (elementAttributesType === emptyObjectType && isUnhyphenatedJsxName(node.name.text)) {
-                error(node.parent, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
-            }
-            else if (elementAttributesType && !isTypeAny(elementAttributesType)) {
-                var correspondingPropSymbol = getPropertyOfType(elementAttributesType, node.name.text);
-                correspondingPropType = correspondingPropSymbol && getTypeOfSymbol(correspondingPropSymbol);
-                if (isUnhyphenatedJsxName(node.name.text)) {
-                    var indexerType = getIndexTypeOfType(elementAttributesType, 0);
-                    if (indexerType) {
-                        correspondingPropType = indexerType;
-                    }
-                    else {
-                        if (!correspondingPropType) {
-                            error(node.name, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.name.text, typeToString(elementAttributesType));
-                            return unknownType;
-                        }
-                    }
-                }
-            }
-            var exprType;
-            if (node.initializer) {
-                exprType = checkExpression(node.initializer);
-            }
-            else {
-                exprType = booleanType;
-            }
-            if (correspondingPropType) {
-                checkTypeAssignableTo(exprType, correspondingPropType, node);
-            }
-            nameTable[node.name.text] = true;
-            return exprType;
-        }
-        function checkJsxSpreadAttribute(node, elementAttributesType, nameTable) {
-            var type = checkExpression(node.expression);
-            var props = getPropertiesOfType(type);
-            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
-                var prop = props_2[_i];
-                if (!nameTable[prop.name]) {
-                    var targetPropSym = getPropertyOfType(elementAttributesType, prop.name);
-                    if (targetPropSym) {
-                        var msg = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property, prop.name);
-                        checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(targetPropSym), node, undefined, msg);
-                    }
-                    nameTable[prop.name] = true;
-                }
-            }
-            return type;
-        }
-        function getJsxType(name) {
-            if (jsxTypes[name] === undefined) {
-                return jsxTypes[name] = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType;
-            }
-            return jsxTypes[name];
-        }
-        function getIntrinsicTagSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
-                if (intrinsicElementsType !== unknownType) {
-                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
-                    if (intrinsicProp) {
-                        links.jsxFlags |= 1;
-                        return links.resolvedSymbol = intrinsicProp;
-                    }
-                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0);
-                    if (indexSignatureType) {
-                        links.jsxFlags |= 2;
-                        return links.resolvedSymbol = intrinsicElementsType.symbol;
-                    }
-                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
-                    return links.resolvedSymbol = unknownSymbol;
-                }
-                else {
-                    if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
-                    }
-                    return links.resolvedSymbol = unknownSymbol;
-                }
-            }
-            return links.resolvedSymbol;
-        }
-        function getJsxElementInstanceType(node, valueType) {
-            ts.Debug.assert(!(valueType.flags & 16384));
-            if (isTypeAny(valueType)) {
-                return anyType;
-            }
-            var signatures = getSignaturesOfType(valueType, 1);
-            if (signatures.length === 0) {
-                signatures = getSignaturesOfType(valueType, 0);
-                if (signatures.length === 0) {
-                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
-                    return unknownType;
-                }
-            }
-            return getUnionType(signatures.map(getReturnTypeOfSignature));
-        }
-        function getJsxElementPropertiesName() {
-            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1536, undefined);
-            var attribsPropTypeSym = jsxNamespace && getSymbol(jsxNamespace.exports, JsxNames.ElementAttributesPropertyNameContainer, 793056);
-            var attribPropType = attribsPropTypeSym && getDeclaredTypeOfSymbol(attribsPropTypeSym);
-            var attribProperties = attribPropType && getPropertiesOfType(attribPropType);
-            if (attribProperties) {
-                if (attribProperties.length === 0) {
-                    return "";
-                }
-                else if (attribProperties.length === 1) {
-                    return attribProperties[0].name;
-                }
-                else {
-                    error(attribsPropTypeSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, JsxNames.ElementAttributesPropertyNameContainer);
-                    return undefined;
-                }
-            }
-            else {
-                return undefined;
-            }
-        }
-        function getResolvedJsxType(node, elemType, elemClassType) {
-            if (!elemType) {
-                elemType = checkExpression(node.tagName);
-            }
-            if (elemType.flags & 16384) {
-                var types = elemType.types;
-                return getUnionType(types.map(function (type) {
-                    return getResolvedJsxType(node, type, elemClassType);
-                }));
-            }
-            var elemInstanceType = getJsxElementInstanceType(node, elemType);
-            if (!elemClassType || !isTypeAssignableTo(elemInstanceType, elemClassType)) {
-                if (jsxElementType) {
-                    var callSignatures = elemType && getSignaturesOfType(elemType, 0);
-                    var callSignature = callSignatures && callSignatures.length > 0 && callSignatures[0];
-                    var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
-                    var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
-                    if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType)) {
-                        var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
-                        if (intrinsicAttributes !== unknownType) {
-                            paramType = intersectTypes(intrinsicAttributes, paramType);
-                        }
-                        return paramType;
-                    }
-                }
-            }
-            if (elemClassType) {
-                checkTypeRelatedTo(elemInstanceType, elemClassType, assignableRelation, node, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
-            }
-            if (isTypeAny(elemInstanceType)) {
-                return elemInstanceType;
-            }
-            var propsName = getJsxElementPropertiesName();
-            if (propsName === undefined) {
-                return anyType;
-            }
-            else if (propsName === "") {
-                return elemInstanceType;
-            }
-            else {
-                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
-                if (!attributesType) {
-                    return emptyObjectType;
-                }
-                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
-                    return attributesType;
-                }
-                else if (attributesType.flags & 16384) {
-                    error(node.tagName, ts.Diagnostics.JSX_element_attributes_type_0_may_not_be_a_union_type, typeToString(attributesType));
-                    return anyType;
-                }
-                else {
-                    var apparentAttributesType = attributesType;
-                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
-                    if (intrinsicClassAttribs !== unknownType) {
-                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
-                        if (typeParams) {
-                            if (typeParams.length === 1) {
-                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
-                            }
-                        }
-                        else {
-                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
-                        }
-                    }
-                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
-                    if (intrinsicAttribs !== unknownType) {
-                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
-                    }
-                    return apparentAttributesType;
-                }
-            }
-        }
-        function getJsxElementAttributesType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedJsxType) {
-                if (isJsxIntrinsicIdentifier(node.tagName)) {
-                    var symbol = getIntrinsicTagSymbol(node);
-                    if (links.jsxFlags & 1) {
-                        return links.resolvedJsxType = getTypeOfSymbol(symbol);
-                    }
-                    else if (links.jsxFlags & 2) {
-                        return links.resolvedJsxType = getIndexInfoOfSymbol(symbol, 0).type;
-                    }
-                    else {
-                        return links.resolvedJsxType = unknownType;
-                    }
-                }
-                else {
-                    var elemClassType = getJsxGlobalElementClassType();
-                    return links.resolvedJsxType = getResolvedJsxType(node, undefined, elemClassType);
-                }
-            }
-            return links.resolvedJsxType;
-        }
-        function getJsxAttributePropertySymbol(attrib) {
-            var attributesType = getJsxElementAttributesType(attrib.parent);
-            var prop = getPropertyOfType(attributesType, attrib.name.text);
-            return prop || unknownSymbol;
-        }
-        function getJsxGlobalElementClassType() {
-            if (!jsxElementClassType) {
-                jsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
-            }
-            return jsxElementClassType;
-        }
-        function getJsxIntrinsicTagNames() {
-            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
-            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
-        }
-        function checkJsxPreconditions(errorNode) {
-            if ((compilerOptions.jsx || 0) === 0) {
-                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
-            }
-            if (jsxElementType === undefined) {
-                if (compilerOptions.noImplicitAny) {
-                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
-                }
-            }
-        }
-        function checkJsxOpeningLikeElement(node) {
-            checkGrammarJsxElement(node);
-            checkJsxPreconditions(node);
-            var reactRefErr = compilerOptions.jsx === 2 ? ts.Diagnostics.Cannot_find_name_0 : undefined;
-            var reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
-            var reactSym = resolveName(node.tagName, reactNamespace, 107455, reactRefErr, reactNamespace);
-            if (reactSym) {
-                getSymbolLinks(reactSym).referenced = true;
-            }
-            var targetAttributesType = getJsxElementAttributesType(node);
-            var nameTable = {};
-            var sawSpreadedAny = false;
-            for (var i = node.attributes.length - 1; i >= 0; i--) {
-                if (node.attributes[i].kind === 246) {
-                    checkJsxAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                }
-                else {
-                    ts.Debug.assert(node.attributes[i].kind === 247);
-                    var spreadType = checkJsxSpreadAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                    if (isTypeAny(spreadType)) {
-                        sawSpreadedAny = true;
-                    }
-                }
-            }
-            if (targetAttributesType && !sawSpreadedAny) {
-                var targetProperties = getPropertiesOfType(targetAttributesType);
-                for (var i = 0; i < targetProperties.length; i++) {
-                    if (!(targetProperties[i].flags & 536870912) &&
-                        nameTable[targetProperties[i].name] === undefined) {
-                        error(node, ts.Diagnostics.Property_0_is_missing_in_type_1, targetProperties[i].name, typeToString(targetAttributesType));
-                    }
-                }
-            }
-        }
-        function checkJsxExpression(node) {
-            if (node.expression) {
-                return checkExpression(node.expression);
-            }
-            else {
-                return unknownType;
-            }
-        }
-        function getDeclarationKindFromSymbol(s) {
-            return s.valueDeclaration ? s.valueDeclaration.kind : 145;
-        }
-        function getDeclarationFlagsFromSymbol(s) {
-            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : s.flags & 134217728 ? 4 | 32 : 0;
-        }
-        function checkClassPropertyAccess(node, left, type, prop) {
-            var flags = getDeclarationFlagsFromSymbol(prop);
-            var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop));
-            var errorNode = node.kind === 172 || node.kind === 218 ?
-                node.name :
-                node.right;
-            if (left.kind === 95) {
-                if (languageVersion < 2 && getDeclarationKindFromSymbol(prop) !== 147) {
-                    error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
-                    return false;
-                }
-                if (flags & 128) {
-                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-            }
-            if (!(flags & (8 | 16))) {
-                return true;
-            }
-            if (flags & 8) {
-                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
-                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-                return true;
-            }
-            if (left.kind === 95) {
-                return true;
-            }
-            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
-                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
-                return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined;
-            });
-            if (!enclosingClass) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass));
-                return false;
-            }
-            if (flags & 32) {
-                return true;
-            }
-            if (type.flags & 33554432) {
-                type = getConstraintOfTypeParameter(type);
-            }
-            if (!(getTargetType(type).flags & (1024 | 2048) && hasBaseType(type, enclosingClass))) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
-                return false;
-            }
-            return true;
-        }
-        function checkNonNullExpression(node) {
-            var type = checkExpression(node);
-            if (strictNullChecks) {
-                var kind = getNullableKind(type);
-                if (kind) {
-                    error(node, kind & 32 ? kind & 64 ?
-                        ts.Diagnostics.Object_is_possibly_null_or_undefined :
-                        ts.Diagnostics.Object_is_possibly_undefined :
-                        ts.Diagnostics.Object_is_possibly_null);
-                }
-                return getNonNullableType(type);
-            }
-            return type;
-        }
-        function checkPropertyAccessExpression(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
-        }
-        function checkQualifiedName(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
-        }
-        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
-            var type = checkNonNullExpression(left);
-            if (isTypeAny(type)) {
-                return type;
-            }
-            var apparentType = getApparentType(getWidenedType(type));
-            if (apparentType === unknownType) {
-                return unknownType;
-            }
-            var prop = getPropertyOfType(apparentType, right.text);
-            if (!prop) {
-                if (right.text) {
-                    error(right, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(right), typeToString(type.flags & 33554432 ? apparentType : type));
-                }
-                return unknownType;
-            }
-            getNodeLinks(node).resolvedSymbol = prop;
-            if (prop.parent && prop.parent.flags & 32) {
-                checkClassPropertyAccess(node, left, apparentType, prop);
-            }
-            var propType = getTypeOfSymbol(prop);
-            if (node.kind !== 172 || ts.isAssignmentTarget(node) ||
-                !(propType.flags & 16384) && !(prop.flags & (3 | 4 | 98304))) {
-                return propType;
-            }
-            var leftmostNode = getLeftmostIdentifierOrThis(node);
-            if (!leftmostNode) {
-                return propType;
-            }
-            if (leftmostNode.kind === 69) {
-                var leftmostSymbol = getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(leftmostNode));
-                if (!leftmostSymbol) {
-                    return propType;
-                }
-                var declaration = leftmostSymbol.valueDeclaration;
-                if (!declaration || declaration.kind !== 218 && declaration.kind !== 142 && declaration.kind !== 169) {
-                    return propType;
-                }
-            }
-            return getFlowTypeOfReference(node, propType, true);
-        }
-        function isValidPropertyAccess(node, propertyName) {
-            var left = node.kind === 172
-                ? node.expression
-                : node.left;
-            var type = checkExpression(left);
-            if (type !== unknownType && !isTypeAny(type)) {
-                var prop = getPropertyOfType(getWidenedType(type), propertyName);
-                if (prop && prop.parent && prop.parent.flags & 32) {
-                    return checkClassPropertyAccess(node, left, type, prop);
-                }
-            }
-            return true;
-        }
-        function getForInVariableSymbol(node) {
-            var initializer = node.initializer;
-            if (initializer.kind === 219) {
-                var variable = initializer.declarations[0];
-                if (variable && !ts.isBindingPattern(variable.name)) {
-                    return getSymbolOfNode(variable);
-                }
-            }
-            else if (initializer.kind === 69) {
-                return getResolvedSymbol(initializer);
-            }
-            return undefined;
-        }
-        function hasNumericPropertyNames(type) {
-            return getIndexTypeOfType(type, 1) && !getIndexTypeOfType(type, 0);
-        }
-        function isForInVariableForNumericPropertyNames(expr) {
-            var e = skipParenthesizedNodes(expr);
-            if (e.kind === 69) {
-                var symbol = getResolvedSymbol(e);
-                if (symbol.flags & 3) {
-                    var child = expr;
-                    var node = expr.parent;
-                    while (node) {
-                        if (node.kind === 207 &&
-                            child === node.statement &&
-                            getForInVariableSymbol(node) === symbol &&
-                            hasNumericPropertyNames(checkExpression(node.expression))) {
-                            return true;
-                        }
-                        child = node;
-                        node = node.parent;
-                    }
-                }
-            }
-            return false;
-        }
-        function checkIndexedAccess(node) {
-            if (!node.argumentExpression) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                if (node.parent.kind === 175 && node.parent.expression === node) {
-                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
-                }
-                else {
-                    var start = node.end - "]".length;
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
-                }
-            }
-            var objectType = getApparentType(checkNonNullExpression(node.expression));
-            var indexType = node.argumentExpression ? checkExpression(node.argumentExpression) : unknownType;
-            if (objectType === unknownType) {
-                return unknownType;
-            }
-            var isConstEnum = isConstEnumObjectType(objectType);
-            if (isConstEnum &&
-                (!node.argumentExpression || node.argumentExpression.kind !== 9)) {
-                error(node.argumentExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
-                return unknownType;
-            }
-            if (node.argumentExpression) {
-                var name_12 = getPropertyNameForIndexedAccess(node.argumentExpression, indexType);
-                if (name_12 !== undefined) {
-                    var prop = getPropertyOfType(objectType, name_12);
-                    if (prop) {
-                        getNodeLinks(node).resolvedSymbol = prop;
-                        return getTypeOfSymbol(prop);
-                    }
-                    else if (isConstEnum) {
-                        error(node.argumentExpression, ts.Diagnostics.Property_0_does_not_exist_on_const_enum_1, name_12, symbolToString(objectType.symbol));
-                        return unknownType;
-                    }
-                }
-            }
-            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 258 | 132 | 16777216)) {
-                if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 132) || isForInVariableForNumericPropertyNames(node.argumentExpression)) {
-                    var numberIndexInfo = getIndexInfoOfType(objectType, 1);
-                    if (numberIndexInfo) {
-                        getNodeLinks(node).resolvedIndexInfo = numberIndexInfo;
-                        return numberIndexInfo.type;
-                    }
-                }
-                var stringIndexInfo = getIndexInfoOfType(objectType, 0);
-                if (stringIndexInfo) {
-                    getNodeLinks(node).resolvedIndexInfo = stringIndexInfo;
-                    return stringIndexInfo.type;
-                }
-                if (compilerOptions.noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors && !isTypeAny(objectType)) {
-                    error(node, getIndexTypeOfType(objectType, 1) ?
-                        ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number :
-                        ts.Diagnostics.Index_signature_of_object_type_implicitly_has_an_any_type);
-                }
-                return anyType;
-            }
-            error(node, ts.Diagnostics.An_index_expression_argument_must_be_of_type_string_number_symbol_or_any);
-            return unknownType;
-        }
-        function getPropertyNameForIndexedAccess(indexArgumentExpression, indexArgumentType) {
-            if (indexArgumentExpression.kind === 9 || indexArgumentExpression.kind === 8) {
-                return indexArgumentExpression.text;
-            }
-            if (indexArgumentExpression.kind === 173 || indexArgumentExpression.kind === 172) {
-                var value = getConstantValue(indexArgumentExpression);
-                if (value !== undefined) {
-                    return value.toString();
-                }
-            }
-            if (checkThatExpressionIsProperSymbolReference(indexArgumentExpression, indexArgumentType, false)) {
-                var rightHandSideName = indexArgumentExpression.name.text;
-                return ts.getPropertyNameForKnownSymbolName(rightHandSideName);
-            }
-            return undefined;
-        }
-        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
-            if (expressionType === unknownType) {
-                return false;
-            }
-            if (!ts.isWellKnownSymbolSyntactically(expression)) {
-                return false;
-            }
-            if ((expressionType.flags & 16777216) === 0) {
-                if (reportError) {
-                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
-                }
-                return false;
-            }
-            var leftHandSide = expression.expression;
-            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
-            if (!leftHandSideSymbol) {
-                return false;
-            }
-            var globalESSymbol = getGlobalESSymbolConstructorSymbol();
-            if (!globalESSymbol) {
-                return false;
-            }
-            if (leftHandSideSymbol !== globalESSymbol) {
-                if (reportError) {
-                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
-                }
-                return false;
-            }
-            return true;
-        }
-        function resolveUntypedCall(node) {
-            if (node.kind === 176) {
-                checkExpression(node.template);
-            }
-            else if (node.kind !== 143) {
-                ts.forEach(node.arguments, function (argument) {
-                    checkExpression(argument);
-                });
-            }
-            return anySignature;
-        }
-        function resolveErrorCall(node) {
-            resolveUntypedCall(node);
-            return unknownSignature;
-        }
-        function reorderCandidates(signatures, result) {
-            var lastParent;
-            var lastSymbol;
-            var cutoffIndex = 0;
-            var index;
-            var specializedIndex = -1;
-            var spliceIndex;
-            ts.Debug.assert(!result.length);
-            for (var _i = 0, signatures_2 = signatures; _i < signatures_2.length; _i++) {
-                var signature = signatures_2[_i];
-                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
-                var parent_9 = signature.declaration && signature.declaration.parent;
-                if (!lastSymbol || symbol === lastSymbol) {
-                    if (lastParent && parent_9 === lastParent) {
-                        index++;
-                    }
-                    else {
-                        lastParent = parent_9;
-                        index = cutoffIndex;
-                    }
-                }
-                else {
-                    index = cutoffIndex = result.length;
-                    lastParent = parent_9;
-                }
-                lastSymbol = symbol;
-                if (signature.hasStringLiterals) {
-                    specializedIndex++;
-                    spliceIndex = specializedIndex;
-                    cutoffIndex++;
-                }
-                else {
-                    spliceIndex = index;
-                }
-                result.splice(spliceIndex, 0, signature);
-            }
-        }
-        function getSpreadArgumentIndex(args) {
-            for (var i = 0; i < args.length; i++) {
-                var arg = args[i];
-                if (arg && arg.kind === 191) {
-                    return i;
-                }
-            }
-            return -1;
-        }
-        function hasCorrectArity(node, args, signature) {
-            var adjustedArgCount;
-            var typeArguments;
-            var callIsIncomplete;
-            var isDecorator;
-            var spreadArgIndex = -1;
-            if (node.kind === 176) {
-                var tagExpression = node;
-                adjustedArgCount = args.length;
-                typeArguments = undefined;
-                if (tagExpression.template.kind === 189) {
-                    var templateExpression = tagExpression.template;
-                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
-                    ts.Debug.assert(lastSpan !== undefined);
-                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
-                }
-                else {
-                    var templateLiteral = tagExpression.template;
-                    ts.Debug.assert(templateLiteral.kind === 11);
-                    callIsIncomplete = !!templateLiteral.isUnterminated;
-                }
-            }
-            else if (node.kind === 143) {
-                isDecorator = true;
-                typeArguments = undefined;
-                adjustedArgCount = getEffectiveArgumentCount(node, undefined, signature);
-            }
-            else {
-                var callExpression = node;
-                if (!callExpression.arguments) {
-                    ts.Debug.assert(callExpression.kind === 175);
-                    return signature.minArgumentCount === 0;
-                }
-                adjustedArgCount = callExpression.arguments.hasTrailingComma ? args.length + 1 : args.length;
-                callIsIncomplete = callExpression.arguments.end === callExpression.end;
-                typeArguments = callExpression.typeArguments;
-                spreadArgIndex = getSpreadArgumentIndex(args);
-            }
-            var hasRightNumberOfTypeArgs = !typeArguments ||
-                (signature.typeParameters && typeArguments.length === signature.typeParameters.length);
-            if (!hasRightNumberOfTypeArgs) {
-                return false;
-            }
-            if (spreadArgIndex >= 0) {
-                return isRestParameterIndex(signature, spreadArgIndex);
-            }
-            if (!signature.hasRestParameter && adjustedArgCount > signature.parameters.length) {
-                return false;
-            }
-            var hasEnoughArguments = adjustedArgCount >= signature.minArgumentCount;
-            return callIsIncomplete || hasEnoughArguments;
-        }
-        function getSingleCallSignature(type) {
-            if (type.flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
-                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                    return resolved.callSignatures[0];
-                }
-            }
-            return undefined;
-        }
-        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
-            var context = createInferenceContext(signature.typeParameters, true);
-            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
-                inferTypes(context, instantiateType(source, contextualMapper), target);
-            });
-            return getSignatureInstantiation(signature, getInferredTypes(context));
-        }
-        function inferTypeArguments(node, signature, args, excludeArgument, context) {
-            var typeParameters = signature.typeParameters;
-            var inferenceMapper = getInferenceMapper(context);
-            for (var i = 0; i < typeParameters.length; i++) {
-                if (!context.inferences[i].isFixed) {
-                    context.inferredTypes[i] = undefined;
-                }
-            }
-            if (context.failedTypeParameterIndex !== undefined && !context.inferences[context.failedTypeParameterIndex].isFixed) {
-                context.failedTypeParameterIndex = undefined;
-            }
-            if (signature.thisType) {
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                inferTypes(context, thisArgumentType, signature.thisType);
-            }
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                if (arg === undefined || arg.kind !== 193) {
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    if (argType === undefined) {
-                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : inferenceMapper;
-                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
-                    }
-                    inferTypes(context, argType, paramType);
-                }
-            }
-            if (excludeArgument) {
-                for (var i = 0; i < argCount; i++) {
-                    if (excludeArgument[i] === false) {
-                        var arg = args[i];
-                        var paramType = getTypeAtPosition(signature, i);
-                        inferTypes(context, checkExpressionWithContextualType(arg, paramType, inferenceMapper), paramType);
-                    }
-                }
-            }
-            getInferredTypes(context);
-        }
-        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
-            var typeParameters = signature.typeParameters;
-            var typeArgumentsAreAssignable = true;
-            var mapper;
-            for (var i = 0; i < typeParameters.length; i++) {
-                if (typeArgumentsAreAssignable) {
-                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                    if (constraint) {
-                        var errorInfo = void 0;
-                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
-                        if (reportErrors && headMessage) {
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
-                            typeArgumentHeadMessage = headMessage;
-                        }
-                        if (!mapper) {
-                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
-                        }
-                        var typeArgument = typeArgumentTypes[i];
-                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
-                    }
-                }
-            }
-            return typeArgumentsAreAssignable;
-        }
-        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
-            if (signature.thisType && signature.thisType !== voidType && node.kind !== 175) {
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
-                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
-                if (!checkTypeRelatedTo(thisArgumentType, signature.thisType, relation, errorNode, headMessage_1)) {
-                    return false;
-                }
-            }
-            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                if (arg === undefined || arg.kind !== 193) {
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    if (argType === undefined) {
-                        argType = arg.kind === 9 && !reportErrors
-                            ? getStringLiteralTypeForText(arg.text)
-                            : checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
-                    }
-                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
-                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        function getThisArgumentOfCall(node) {
-            if (node.kind === 174) {
-                var callee = node.expression;
-                if (callee.kind === 172) {
-                    return callee.expression;
-                }
-                else if (callee.kind === 173) {
-                    return callee.expression;
-                }
-            }
-        }
-        function getEffectiveCallArguments(node) {
-            var args;
-            if (node.kind === 176) {
-                var template = node.template;
-                args = [undefined];
-                if (template.kind === 189) {
-                    ts.forEach(template.templateSpans, function (span) {
-                        args.push(span.expression);
-                    });
-                }
-            }
-            else if (node.kind === 143) {
-                return undefined;
-            }
-            else {
-                args = node.arguments || emptyArray;
-            }
-            return args;
-        }
-        function getEffectiveArgumentCount(node, args, signature) {
-            if (node.kind === 143) {
-                switch (node.parent.kind) {
-                    case 221:
-                    case 192:
-                        return 1;
-                    case 145:
-                        return 2;
-                    case 147:
-                    case 149:
-                    case 150:
-                        if (languageVersion === 0) {
-                            return 2;
-                        }
-                        return signature.parameters.length >= 3 ? 3 : 2;
-                    case 142:
-                        return 3;
-                }
-            }
-            else {
-                return args.length;
-            }
-        }
-        function getEffectiveDecoratorFirstArgumentType(node) {
-            if (node.kind === 221) {
-                var classSymbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(classSymbol);
-            }
-            if (node.kind === 142) {
-                node = node.parent;
-                if (node.kind === 148) {
-                    var classSymbol = getSymbolOfNode(node);
-                    return getTypeOfSymbol(classSymbol);
-                }
-            }
-            if (node.kind === 145 ||
-                node.kind === 147 ||
-                node.kind === 149 ||
-                node.kind === 150) {
-                return getParentTypeOfClassElement(node);
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        function getEffectiveDecoratorSecondArgumentType(node) {
-            if (node.kind === 221) {
-                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 142) {
-                node = node.parent;
-                if (node.kind === 148) {
-                    return anyType;
-                }
-            }
-            if (node.kind === 145 ||
-                node.kind === 147 ||
-                node.kind === 149 ||
-                node.kind === 150) {
-                var element = node;
-                switch (element.name.kind) {
-                    case 69:
-                    case 8:
-                    case 9:
-                        return getStringLiteralTypeForText(element.name.text);
-                    case 140:
-                        var nameType = checkComputedPropertyName(element.name);
-                        if (isTypeOfKind(nameType, 16777216)) {
-                            return nameType;
-                        }
-                        else {
-                            return stringType;
-                        }
-                    default:
-                        ts.Debug.fail("Unsupported property name.");
-                        return unknownType;
-                }
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        function getEffectiveDecoratorThirdArgumentType(node) {
-            if (node.kind === 221) {
-                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 142) {
-                return numberType;
-            }
-            if (node.kind === 145) {
-                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 147 ||
-                node.kind === 149 ||
-                node.kind === 150) {
-                var propertyType = getTypeOfNode(node);
-                return createTypedPropertyDescriptorType(propertyType);
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        function getEffectiveDecoratorArgumentType(node, argIndex) {
-            if (argIndex === 0) {
-                return getEffectiveDecoratorFirstArgumentType(node.parent);
-            }
-            else if (argIndex === 1) {
-                return getEffectiveDecoratorSecondArgumentType(node.parent);
-            }
-            else if (argIndex === 2) {
-                return getEffectiveDecoratorThirdArgumentType(node.parent);
-            }
-            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
-            return unknownType;
-        }
-        function getEffectiveArgumentType(node, argIndex, arg) {
-            if (node.kind === 143) {
-                return getEffectiveDecoratorArgumentType(node, argIndex);
-            }
-            else if (argIndex === 0 && node.kind === 176) {
-                return getGlobalTemplateStringsArrayType();
-            }
-            return undefined;
-        }
-        function getEffectiveArgument(node, args, argIndex) {
-            if (node.kind === 143 ||
-                (argIndex === 0 && node.kind === 176)) {
-                return undefined;
-            }
-            return args[argIndex];
-        }
-        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
-            if (node.kind === 143) {
-                return node.expression;
-            }
-            else if (argIndex === 0 && node.kind === 176) {
-                return node.template;
-            }
-            else {
-                return arg;
-            }
-        }
-        function resolveCall(node, signatures, candidatesOutArray, headMessage) {
-            var isTaggedTemplate = node.kind === 176;
-            var isDecorator = node.kind === 143;
-            var typeArguments;
-            if (!isTaggedTemplate && !isDecorator) {
-                typeArguments = node.typeArguments;
-                if (node.expression.kind !== 95) {
-                    ts.forEach(typeArguments, checkSourceElement);
-                }
-            }
-            var candidates = candidatesOutArray || [];
-            reorderCandidates(signatures, candidates);
-            if (!candidates.length) {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
-                return resolveErrorCall(node);
-            }
-            var args = getEffectiveCallArguments(node);
-            var excludeArgument;
-            if (!isDecorator) {
-                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
-                    if (isContextSensitive(args[i])) {
-                        if (!excludeArgument) {
-                            excludeArgument = new Array(args.length);
-                        }
-                        excludeArgument[i] = true;
-                    }
-                }
-            }
-            var candidateForArgumentError;
-            var candidateForTypeArgumentError;
-            var resultOfFailedInference;
-            var result;
-            if (candidates.length > 1) {
-                result = chooseOverload(candidates, subtypeRelation);
-            }
-            if (!result) {
-                candidateForArgumentError = undefined;
-                candidateForTypeArgumentError = undefined;
-                resultOfFailedInference = undefined;
-                result = chooseOverload(candidates, assignableRelation);
-            }
-            if (result) {
-                return result;
-            }
-            if (candidateForArgumentError) {
-                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, undefined, true);
-            }
-            else if (candidateForTypeArgumentError) {
-                if (!isTaggedTemplate && !isDecorator && typeArguments) {
-                    var typeArguments_2 = node.typeArguments;
-                    checkTypeArguments(candidateForTypeArgumentError, typeArguments_2, ts.map(typeArguments_2, getTypeFromTypeNode), true, headMessage);
-                }
-                else {
-                    ts.Debug.assert(resultOfFailedInference.failedTypeParameterIndex >= 0);
-                    var failedTypeParameter = candidateForTypeArgumentError.typeParameters[resultOfFailedInference.failedTypeParameterIndex];
-                    var inferenceCandidates = getInferenceCandidates(resultOfFailedInference, resultOfFailedInference.failedTypeParameterIndex);
-                    var diagnosticChainHead = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly, typeToString(failedTypeParameter));
-                    if (headMessage) {
-                        diagnosticChainHead = ts.chainDiagnosticMessages(diagnosticChainHead, headMessage);
-                    }
-                    reportNoCommonSupertypeError(inferenceCandidates, node.expression || node.tag, diagnosticChainHead);
-                }
-            }
-            else {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
-            }
-            if (!produceDiagnostics) {
-                for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
-                    var candidate = candidates_1[_i];
-                    if (hasCorrectArity(node, args, candidate)) {
-                        if (candidate.typeParameters && typeArguments) {
-                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNode));
-                        }
-                        return candidate;
-                    }
-                }
-            }
-            return resolveErrorCall(node);
-            function reportError(message, arg0, arg1, arg2) {
-                var errorInfo;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
-                if (headMessage) {
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
-            }
-            function chooseOverload(candidates, relation) {
-                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
-                    var originalCandidate = candidates_2[_i];
-                    if (!hasCorrectArity(node, args, originalCandidate)) {
-                        continue;
-                    }
-                    var candidate = void 0;
-                    var typeArgumentsAreValid = void 0;
-                    var inferenceContext = originalCandidate.typeParameters
-                        ? createInferenceContext(originalCandidate.typeParameters, false)
-                        : undefined;
-                    while (true) {
-                        candidate = originalCandidate;
-                        if (candidate.typeParameters) {
-                            var typeArgumentTypes = void 0;
-                            if (typeArguments) {
-                                typeArgumentTypes = ts.map(typeArguments, getTypeFromTypeNode);
-                                typeArgumentsAreValid = checkTypeArguments(candidate, typeArguments, typeArgumentTypes, false);
-                            }
-                            else {
-                                inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
-                                typeArgumentsAreValid = inferenceContext.failedTypeParameterIndex === undefined;
-                                typeArgumentTypes = inferenceContext.inferredTypes;
-                            }
-                            if (!typeArgumentsAreValid) {
-                                break;
-                            }
-                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
-                        }
-                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, false)) {
-                            break;
-                        }
-                        var index = excludeArgument ? ts.indexOf(excludeArgument, true) : -1;
-                        if (index < 0) {
-                            return candidate;
-                        }
-                        excludeArgument[index] = false;
-                    }
-                    if (originalCandidate.typeParameters) {
-                        var instantiatedCandidate = candidate;
-                        if (typeArgumentsAreValid) {
-                            candidateForArgumentError = instantiatedCandidate;
-                        }
-                        else {
-                            candidateForTypeArgumentError = originalCandidate;
-                            if (!typeArguments) {
-                                resultOfFailedInference = inferenceContext;
-                            }
-                        }
-                    }
-                    else {
-                        ts.Debug.assert(originalCandidate === candidate);
-                        candidateForArgumentError = originalCandidate;
-                    }
-                }
-                return undefined;
-            }
-        }
-        function resolveCallExpression(node, candidatesOutArray) {
-            if (node.expression.kind === 95) {
-                var superType = checkSuperExpression(node.expression);
-                if (superType !== unknownType) {
-                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
-                    if (baseTypeNode) {
-                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments);
-                        return resolveCall(node, baseConstructors, candidatesOutArray);
-                    }
-                }
-                return resolveUntypedCall(node);
-            }
-            var funcType = checkNonNullExpression(node.expression);
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0);
-            var constructSignatures = getSignaturesOfType(apparentType, 1);
-            if (isTypeAny(funcType) || (!callSignatures.length && !constructSignatures.length && !(funcType.flags & 16384) && isTypeAssignableTo(funcType, globalFunctionType))) {
-                if (funcType !== unknownType && node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
-                }
-                return resolveUntypedCall(node);
-            }
-            if (!callSignatures.length) {
-                if (constructSignatures.length) {
-                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
-                }
-                else {
-                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                }
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        function resolveNewExpression(node, candidatesOutArray) {
-            if (node.arguments && languageVersion < 1) {
-                var spreadIndex = getSpreadArgumentIndex(node.arguments);
-                if (spreadIndex >= 0) {
-                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
-                }
-            }
-            var expressionType = checkNonNullExpression(node.expression);
-            expressionType = getApparentType(expressionType);
-            if (expressionType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
-            if (valueDecl && valueDecl.flags & 128) {
-                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
-                return resolveErrorCall(node);
-            }
-            if (isTypeAny(expressionType)) {
-                if (node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
-                }
-                return resolveUntypedCall(node);
-            }
-            var constructSignatures = getSignaturesOfType(expressionType, 1);
-            if (constructSignatures.length) {
-                if (!isConstructorAccessible(node, constructSignatures[0])) {
-                    return resolveErrorCall(node);
-                }
-                return resolveCall(node, constructSignatures, candidatesOutArray);
-            }
-            var callSignatures = getSignaturesOfType(expressionType, 0);
-            if (callSignatures.length) {
-                var signature = resolveCall(node, callSignatures, candidatesOutArray);
-                if (getReturnTypeOfSignature(signature) !== voidType) {
-                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
-                }
-                if (signature.thisType === voidType) {
-                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
-                }
-                return signature;
-            }
-            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
-            return resolveErrorCall(node);
-        }
-        function isConstructorAccessible(node, signature) {
-            if (!signature || !signature.declaration) {
-                return true;
-            }
-            var declaration = signature.declaration;
-            var flags = declaration.flags;
-            if (!(flags & (8 | 16))) {
-                return true;
-            }
-            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
-            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
-            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                if (flags & 8) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
-                if (flags & 16) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
-                return false;
-            }
-            return true;
-        }
-        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
-            var tagType = checkExpression(node.tag);
-            var apparentType = getApparentType(tagType);
-            if (apparentType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0);
-            if (isTypeAny(tagType) || (!callSignatures.length && !(tagType.flags & 16384) && isTypeAssignableTo(tagType, globalFunctionType))) {
-                return resolveUntypedCall(node);
-            }
-            if (!callSignatures.length) {
-                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        function getDiagnosticHeadMessageForDecoratorResolution(node) {
-            switch (node.parent.kind) {
-                case 221:
-                case 192:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
-                case 142:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
-                case 145:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
-                case 147:
-                case 149:
-                case 150:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
-            }
-        }
-        function resolveDecorator(node, candidatesOutArray) {
-            var funcType = checkExpression(node.expression);
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0);
-            if (funcType === anyType || (!callSignatures.length && !(funcType.flags & 16384) && isTypeAssignableTo(funcType, globalFunctionType))) {
-                return resolveUntypedCall(node);
-            }
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            if (!callSignatures.length) {
-                var errorInfo = void 0;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
-        }
-        function resolveSignature(node, candidatesOutArray) {
-            switch (node.kind) {
-                case 174:
-                    return resolveCallExpression(node, candidatesOutArray);
-                case 175:
-                    return resolveNewExpression(node, candidatesOutArray);
-                case 176:
-                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
-                case 143:
-                    return resolveDecorator(node, candidatesOutArray);
-            }
-            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
-        }
-        function getResolvedSignature(node, candidatesOutArray) {
-            var links = getNodeLinks(node);
-            var cached = links.resolvedSignature;
-            if (cached && cached !== anySignature && !candidatesOutArray) {
-                return cached;
-            }
-            links.resolvedSignature = anySignature;
-            var result = resolveSignature(node, candidatesOutArray);
-            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
-            return result;
-        }
-        function getResolvedOrAnySignature(node) {
-            return getNodeLinks(node).resolvedSignature === anySignature ? anySignature : getResolvedSignature(node);
-        }
-        function getInferredClassType(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.inferredClassType) {
-                links.inferredClassType = createAnonymousType(undefined, symbol.members, emptyArray, emptyArray, undefined, undefined);
-            }
-            return links.inferredClassType;
-        }
-        function checkCallExpression(node) {
-            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
-            var signature = getResolvedSignature(node);
-            if (node.expression.kind === 95) {
-                return voidType;
-            }
-            if (node.kind === 175) {
-                var declaration = signature.declaration;
-                if (declaration &&
-                    declaration.kind !== 148 &&
-                    declaration.kind !== 152 &&
-                    declaration.kind !== 157 &&
-                    !ts.isJSDocConstructSignature(declaration)) {
-                    var funcSymbol = checkExpression(node.expression).symbol;
-                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16)) {
-                        return getInferredClassType(funcSymbol);
-                    }
-                    else if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
-                    }
-                    return anyType;
-                }
-            }
-            if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, true)) {
-                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
-            }
-            return getReturnTypeOfSignature(signature);
-        }
-        function checkTaggedTemplateExpression(node) {
-            return getReturnTypeOfSignature(getResolvedSignature(node));
-        }
-        function checkAssertion(node) {
-            var exprType = getRegularTypeOfObjectLiteral(checkExpression(node.expression));
-            var targetType = getTypeFromTypeNode(node.type);
-            if (produceDiagnostics && targetType !== unknownType) {
-                var widenedType = getWidenedType(exprType);
-                if (!isTypeComparableTo(targetType, widenedType)) {
-                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
-                }
-            }
-            return targetType;
-        }
-        function checkNonNullAssertion(node) {
-            return getNonNullableType(checkExpression(node.expression));
-        }
-        function getTypeOfParameter(symbol) {
-            var type = getTypeOfSymbol(symbol);
-            if (strictNullChecks) {
-                var declaration = symbol.valueDeclaration;
-                if (declaration && declaration.initializer) {
-                    return addNullableKind(type, 32);
-                }
-            }
-            return type;
-        }
-        function getTypeAtPosition(signature, pos) {
-            return signature.hasRestParameter ?
-                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
-                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
-        }
-        function assignContextualParameterTypes(signature, context, mapper) {
-            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
-            for (var i = 0; i < len; i++) {
-                var parameter = signature.parameters[i];
-                var contextualParameterType = getTypeAtPosition(context, i);
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
-            }
-            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
-                var parameter = ts.lastOrUndefined(signature.parameters);
-                var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
-            }
-        }
-        function assignBindingElementTypes(node) {
-            if (ts.isBindingPattern(node.name)) {
-                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (element.kind !== 193) {
-                        if (element.name.kind === 69) {
-                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
-                        }
-                        assignBindingElementTypes(element);
-                    }
-                }
-            }
-        }
-        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType, mapper) {
-            var links = getSymbolLinks(parameter);
-            if (!links.type) {
-                links.type = instantiateType(contextualType, mapper);
-                if (links.type === emptyObjectType &&
-                    (parameter.valueDeclaration.name.kind === 167 ||
-                        parameter.valueDeclaration.name.kind === 168)) {
-                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
-                }
-                assignBindingElementTypes(parameter.valueDeclaration);
-            }
-            else if (isInferentialContext(mapper)) {
-                inferTypes(mapper.context, links.type, instantiateType(contextualType, mapper));
-            }
-        }
-        function getReturnTypeFromJSDocComment(func) {
-            var returnTag = ts.getJSDocReturnTag(func);
-            if (returnTag && returnTag.typeExpression) {
-                return getTypeFromTypeNode(returnTag.typeExpression.type);
-            }
-            return undefined;
-        }
-        function createPromiseType(promisedType) {
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType !== emptyGenericType) {
-                promisedType = getAwaitedType(promisedType);
-                return createTypeReference(globalPromiseType, [promisedType]);
-            }
-            return emptyObjectType;
-        }
-        function getReturnTypeFromBody(func, contextualMapper) {
-            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
-            if (!func.body) {
-                return unknownType;
-            }
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var type;
-            if (func.body.kind !== 199) {
-                type = checkExpressionCached(func.body, contextualMapper);
-                if (isAsync) {
-                    type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                }
-            }
-            else {
-                var types = void 0;
-                var funcIsGenerator = !!func.asteriskToken;
-                if (funcIsGenerator) {
-                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
-                    if (types.length === 0) {
-                        var iterableIteratorAny = createIterableIteratorType(anyType);
-                        if (compilerOptions.noImplicitAny) {
-                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
-                        }
-                        return iterableIteratorAny;
-                    }
-                }
-                else {
-                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
-                    if (!types) {
-                        return neverType;
-                    }
-                    if (types.length === 0) {
-                        if (isAsync) {
-                            var promiseType = createPromiseType(voidType);
-                            if (promiseType === emptyObjectType) {
-                                error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-                                return unknownType;
-                            }
-                            return promiseType;
-                        }
-                        return voidType;
-                    }
-                }
-                type = contextualSignature ? getUnionType(types) : getCommonSupertype(types);
-                if (!type) {
-                    if (funcIsGenerator) {
-                        error(func, ts.Diagnostics.No_best_common_type_exists_among_yield_expressions);
-                        return createIterableIteratorType(unknownType);
-                    }
-                    else {
-                        error(func, ts.Diagnostics.No_best_common_type_exists_among_return_expressions);
-                        return getUnionType(types);
-                    }
-                }
-                if (funcIsGenerator) {
-                    type = createIterableIteratorType(type);
-                }
-            }
-            if (!contextualSignature) {
-                reportErrorsFromWidening(func, type);
-            }
-            var widenedType = getWidenedType(type);
-            if (isAsync) {
-                var promiseType = createPromiseType(widenedType);
-                if (promiseType === emptyObjectType) {
-                    error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-                    return unknownType;
-                }
-                return promiseType;
-            }
-            else {
-                return widenedType;
-            }
-        }
-        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
-            var aggregatedTypes = [];
-            ts.forEachYieldExpression(func.body, function (yieldExpression) {
-                var expr = yieldExpression.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (yieldExpression.asteriskToken) {
-                        type = checkElementTypeOfIterable(type, yieldExpression.expression);
-                    }
-                    if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
-                    }
-                }
-            });
-            return aggregatedTypes;
-        }
-        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var aggregatedTypes = [];
-            var hasReturnWithNoExpression = !!(func.flags & 32768);
-            var hasReturnOfTypeNever = false;
-            ts.forEachReturnStatement(func.body, function (returnStatement) {
-                var expr = returnStatement.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (isAsync) {
-                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                    }
-                    if (type === neverType) {
-                        hasReturnOfTypeNever = true;
-                    }
-                    else if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
-                    }
-                }
-                else {
-                    hasReturnWithNoExpression = true;
-                }
-            });
-            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
-                func.kind === 179 || func.kind === 180)) {
-                return undefined;
-            }
-            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
-                if (!ts.contains(aggregatedTypes, undefinedType)) {
-                    aggregatedTypes.push(undefinedType);
-                }
-            }
-            return aggregatedTypes;
-        }
-        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            if (returnType && maybeTypeOfKind(returnType, 1 | 16)) {
-                return;
-            }
-            if (ts.nodeIsMissing(func.body) || func.body.kind !== 199 || !(func.flags & 32768)) {
-                return;
-            }
-            var hasExplicitReturn = func.flags & 65536;
-            if (returnType === neverType) {
-                error(func.type, ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
-            }
-            else if (returnType && !hasExplicitReturn) {
-                error(func.type, ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
-            }
-            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
-                error(func.type, ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
-            }
-            else if (compilerOptions.noImplicitReturns) {
-                if (!returnType) {
-                    if (!hasExplicitReturn) {
-                        return;
-                    }
-                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
-                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
-                        return;
-                    }
-                }
-                error(func.type || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
-            }
-        }
-        function checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper) {
-            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
-            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
-            if (!hasGrammarError && node.kind === 179) {
-                checkGrammarForGenerator(node);
-            }
-            if (contextualMapper === identityMapper && isContextSensitive(node)) {
-                checkNodeDeferred(node);
-                return anyFunctionType;
-            }
-            var links = getNodeLinks(node);
-            var type = getTypeOfSymbol(node.symbol);
-            var contextSensitive = isContextSensitive(node);
-            var mightFixTypeParameters = contextSensitive && isInferentialContext(contextualMapper);
-            if (mightFixTypeParameters || !(links.flags & 1024)) {
-                var contextualSignature = getContextualSignature(node);
-                var contextChecked = !!(links.flags & 1024);
-                if (mightFixTypeParameters || !contextChecked) {
-                    links.flags |= 1024;
-                    if (contextualSignature) {
-                        var signature = getSignaturesOfType(type, 0)[0];
-                        if (contextSensitive) {
-                            assignContextualParameterTypes(signature, contextualSignature, contextualMapper || identityMapper);
-                        }
-                        if (mightFixTypeParameters || !node.type && !signature.resolvedReturnType) {
-                            var returnType = getReturnTypeFromBody(node, contextualMapper);
-                            if (!signature.resolvedReturnType) {
-                                signature.resolvedReturnType = returnType;
-                            }
-                        }
-                    }
-                    if (!contextChecked) {
-                        checkSignatureDeclaration(node);
-                        checkNodeDeferred(node);
-                    }
-                }
-            }
-            if (produceDiagnostics && node.kind !== 147 && node.kind !== 146) {
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-            }
-            return type;
-        }
-        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
-            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
-            var isAsync = ts.isAsyncFunctionLike(node);
-            var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-            if (!node.asteriskToken) {
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (node.body) {
-                if (!node.type) {
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
-                }
-                if (node.body.kind === 199) {
-                    checkSourceElement(node.body);
-                }
-                else {
-                    var exprType = checkExpression(node.body);
-                    if (returnOrPromisedType) {
-                        if (isAsync) {
-                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member);
-                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
-                        }
-                    }
-                }
-            }
-        }
-        function checkArithmeticOperandType(operand, type, diagnostic) {
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 132)) {
-                error(operand, diagnostic);
-                return false;
-            }
-            return true;
-        }
-        function isReadonlySymbol(symbol) {
-            return symbol.flags & 4 && (getDeclarationFlagsFromSymbol(symbol) & 64) !== 0 ||
-                symbol.flags & 3 && (getDeclarationFlagsFromSymbol(symbol) & 2048) !== 0 ||
-                symbol.flags & 98304 && !(symbol.flags & 65536) ||
-                (symbol.flags & 8) !== 0;
-        }
-        function isReferenceToReadonlyEntity(expr, symbol) {
-            if (isReadonlySymbol(symbol)) {
-                if (symbol.flags & 4 &&
-                    (expr.kind === 172 || expr.kind === 173) &&
-                    expr.expression.kind === 97) {
-                    var func = ts.getContainingFunction(expr);
-                    if (!(func && func.kind === 148))
-                        return true;
-                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
-                }
-                return true;
-            }
-            return false;
-        }
-        function isReferenceThroughNamespaceImport(expr) {
-            if (expr.kind === 172 || expr.kind === 173) {
-                var node = skipParenthesizedNodes(expr.expression);
-                if (node.kind === 69) {
-                    var symbol = getNodeLinks(node).resolvedSymbol;
-                    if (symbol.flags & 8388608) {
-                        var declaration = getDeclarationOfAliasSymbol(symbol);
-                        return declaration && declaration.kind === 232;
-                    }
-                }
-            }
-            return false;
-        }
-        function checkReferenceExpression(expr, invalidReferenceMessage, constantVariableMessage) {
-            var node = skipParenthesizedNodes(expr);
-            if (node.kind !== 69 && node.kind !== 172 && node.kind !== 173) {
-                error(expr, invalidReferenceMessage);
-                return false;
-            }
-            var links = getNodeLinks(node);
-            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
-            if (symbol) {
-                if (symbol !== unknownSymbol && symbol !== argumentsSymbol) {
-                    if (node.kind === 69 && !(symbol.flags & 3)) {
-                        error(expr, invalidReferenceMessage);
-                        return false;
-                    }
-                    if (isReferenceToReadonlyEntity(node, symbol) || isReferenceThroughNamespaceImport(node)) {
-                        error(expr, constantVariableMessage);
-                        return false;
-                    }
-                }
-            }
-            else if (node.kind === 173) {
-                if (links.resolvedIndexInfo && links.resolvedIndexInfo.isReadonly) {
-                    error(expr, constantVariableMessage);
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkDeleteExpression(node) {
-            checkExpression(node.expression);
-            return booleanType;
-        }
-        function checkTypeOfExpression(node) {
-            checkExpression(node.expression);
-            return stringType;
-        }
-        function checkVoidExpression(node) {
-            checkExpression(node.expression);
-            return undefinedType;
-        }
-        function checkAwaitExpression(node) {
-            if (produceDiagnostics) {
-                if (!(node.flags & 33554432)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
-                }
-            }
-            var operandType = checkExpression(node.expression);
-            return checkAwaitedType(operandType, node);
-        }
-        function checkPrefixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            switch (node.operator) {
-                case 35:
-                case 36:
-                case 50:
-                    if (maybeTypeOfKind(operandType, 16777216)) {
-                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
-                    }
-                    return numberType;
-                case 49:
-                    return booleanType;
-                case 41:
-                case 42:
-                    var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-                    if (ok) {
-                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
-                    }
-                    return numberType;
-            }
-            return unknownType;
-        }
-        function checkPostfixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-            if (ok) {
-                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
-            }
-            return numberType;
-        }
-        function maybeTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 49152) {
-                var types = type.types;
-                for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
-                    var t = types_10[_i];
-                    if (maybeTypeOfKind(t, kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 16384) {
-                var types = type.types;
-                for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
-                    var t = types_11[_i];
-                    if (!isTypeOfKind(t, kind)) {
-                        return false;
-                    }
-                }
-                return true;
-            }
-            if (type.flags & 32768) {
-                var types = type.types;
-                for (var _a = 0, types_12 = types; _a < types_12.length; _a++) {
-                    var t = types_12[_a];
-                    if (isTypeOfKind(t, kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isConstEnumObjectType(type) {
-            return type.flags & (80896 | 65536) && type.symbol && isConstEnumSymbol(type.symbol);
-        }
-        function isConstEnumSymbol(symbol) {
-            return (symbol.flags & 128) !== 0;
-        }
-        function checkInstanceOfExpression(left, right, leftType, rightType) {
-            if (isTypeOfKind(leftType, 16777726)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            if (!(isTypeAny(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
-            }
-            return booleanType;
-        }
-        function checkInExpression(left, right, leftType, rightType) {
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 | 132 | 16777216)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
-            }
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 | 512)) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            return booleanType;
-        }
-        function checkObjectLiteralAssignment(node, sourceType, contextualMapper) {
-            var properties = node.properties;
-            for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
-                var p = properties_3[_i];
-                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, contextualMapper);
-            }
-            return sourceType;
-        }
-        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, contextualMapper) {
-            if (property.kind === 253 || property.kind === 254) {
-                var name_13 = property.name;
-                if (name_13.kind === 140) {
-                    checkComputedPropertyName(name_13);
-                }
-                if (isComputedNonLiteralName(name_13)) {
-                    return undefined;
-                }
-                var text = getTextOfPropertyName(name_13);
-                var type = isTypeAny(objectLiteralType)
-                    ? objectLiteralType
-                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
-                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1) ||
-                        getIndexTypeOfType(objectLiteralType, 0);
-                if (type) {
-                    if (property.kind === 254) {
-                        return checkDestructuringAssignment(property, type);
-                    }
-                    else {
-                        return checkDestructuringAssignment(property.initializer, type);
-                    }
-                }
-                else {
-                    error(name_13, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_13));
-                }
-            }
-            else {
-                error(property, ts.Diagnostics.Property_assignment_expected);
-            }
-        }
-        function checkArrayLiteralAssignment(node, sourceType, contextualMapper) {
-            var elementType = checkIteratedTypeOrElementType(sourceType, node, false) || unknownType;
-            var elements = node.elements;
-            for (var i = 0; i < elements.length; i++) {
-                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, contextualMapper);
-            }
-            return sourceType;
-        }
-        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, contextualMapper) {
-            var elements = node.elements;
-            var element = elements[elementIndex];
-            if (element.kind !== 193) {
-                if (element.kind !== 191) {
-                    var propName = "" + elementIndex;
-                    var type = isTypeAny(sourceType)
-                        ? sourceType
-                        : isTupleLikeType(sourceType)
-                            ? getTypeOfPropertyOfType(sourceType, propName)
-                            : elementType;
-                    if (type) {
-                        return checkDestructuringAssignment(element, type, contextualMapper);
-                    }
-                    else {
-                        if (isTupleType(sourceType)) {
-                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), sourceType.elementTypes.length, elements.length);
-                        }
-                        else {
-                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
-                        }
-                    }
-                }
-                else {
-                    if (elementIndex < elements.length - 1) {
-                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
-                    }
-                    else {
-                        var restExpression = element.expression;
-                        if (restExpression.kind === 187 && restExpression.operatorToken.kind === 56) {
-                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
-                        }
-                        else {
-                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), contextualMapper);
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function checkDestructuringAssignment(exprOrAssignment, sourceType, contextualMapper) {
-            var target;
-            if (exprOrAssignment.kind === 254) {
-                var prop = exprOrAssignment;
-                if (prop.objectAssignmentInitializer) {
-                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, contextualMapper);
-                }
-                target = exprOrAssignment.name;
-            }
-            else {
-                target = exprOrAssignment;
-            }
-            if (target.kind === 187 && target.operatorToken.kind === 56) {
-                checkBinaryExpression(target, contextualMapper);
-                target = target.left;
-            }
-            if (target.kind === 171) {
-                return checkObjectLiteralAssignment(target, sourceType, contextualMapper);
-            }
-            if (target.kind === 170) {
-                return checkArrayLiteralAssignment(target, sourceType, contextualMapper);
-            }
-            return checkReferenceAssignment(target, sourceType, contextualMapper);
-        }
-        function checkReferenceAssignment(target, sourceType, contextualMapper) {
-            var targetType = checkExpression(target, contextualMapper);
-            if (checkReferenceExpression(target, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property)) {
-                checkTypeAssignableTo(sourceType, targetType, target, undefined);
-            }
-            return sourceType;
-        }
-        function isTypeEqualityComparableTo(source, target) {
-            return (target.flags & 96) !== 0 || isTypeComparableTo(source, target);
-        }
-        function checkBinaryExpression(node, contextualMapper) {
-            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, contextualMapper, node);
-        }
-        function checkBinaryLikeExpression(left, operatorToken, right, contextualMapper, errorNode) {
-            var operator = operatorToken.kind;
-            if (operator === 56 && (left.kind === 171 || left.kind === 170)) {
-                return checkDestructuringAssignment(left, checkExpression(right, contextualMapper), contextualMapper);
-            }
-            var leftType = checkExpression(left, contextualMapper);
-            var rightType = checkExpression(right, contextualMapper);
-            switch (operator) {
-                case 37:
-                case 38:
-                case 59:
-                case 60:
-                case 39:
-                case 61:
-                case 40:
-                case 62:
-                case 36:
-                case 58:
-                case 43:
-                case 63:
-                case 44:
-                case 64:
-                case 45:
-                case 65:
-                case 47:
-                case 67:
-                case 48:
-                case 68:
-                case 46:
-                case 66:
-                    if (leftType.flags & 96)
-                        leftType = rightType;
-                    if (rightType.flags & 96)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var suggestedOperator = void 0;
-                    if ((leftType.flags & 8) &&
-                        (rightType.flags & 8) &&
-                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
-                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
-                    }
-                    else {
-                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        if (leftOk && rightOk) {
-                            checkAssignmentOperator(numberType);
-                        }
-                    }
-                    return numberType;
-                case 35:
-                case 57:
-                    if (leftType.flags & 96)
-                        leftType = rightType;
-                    if (rightType.flags & 96)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var resultType = void 0;
-                    if (isTypeOfKind(leftType, 132) && isTypeOfKind(rightType, 132)) {
-                        resultType = numberType;
-                    }
-                    else {
-                        if (isTypeOfKind(leftType, 258) || isTypeOfKind(rightType, 258)) {
-                            resultType = stringType;
-                        }
-                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
-                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
-                        }
-                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
-                            return resultType;
-                        }
-                    }
-                    if (!resultType) {
-                        reportOperatorError();
-                        return anyType;
-                    }
-                    if (operator === 57) {
-                        checkAssignmentOperator(resultType);
-                    }
-                    return resultType;
-                case 25:
-                case 27:
-                case 28:
-                case 29:
-                    if (checkForDisallowedESSymbolOperand(operator)) {
-                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
-                            reportOperatorError();
-                        }
-                    }
-                    return booleanType;
-                case 30:
-                case 31:
-                case 32:
-                case 33:
-                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
-                        reportOperatorError();
-                    }
-                    return booleanType;
-                case 91:
-                    return checkInstanceOfExpression(left, right, leftType, rightType);
-                case 90:
-                    return checkInExpression(left, right, leftType, rightType);
-                case 51:
-                    return addNullableKind(rightType, getNullableKind(leftType));
-                case 52:
-                    return getUnionType([getNonNullableType(leftType), rightType]);
-                case 56:
-                    checkAssignmentOperator(rightType);
-                    return getRegularTypeOfObjectLiteral(rightType);
-                case 24:
-                    return rightType;
-            }
-            function checkForDisallowedESSymbolOperand(operator) {
-                var offendingSymbolOperand = maybeTypeOfKind(leftType, 16777216) ? left :
-                    maybeTypeOfKind(rightType, 16777216) ? right :
-                        undefined;
-                if (offendingSymbolOperand) {
-                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
-                    return false;
-                }
-                return true;
-            }
-            function getSuggestedBooleanOperator(operator) {
-                switch (operator) {
-                    case 47:
-                    case 67:
-                        return 52;
-                    case 48:
-                    case 68:
-                        return 33;
-                    case 46:
-                    case 66:
-                        return 51;
-                    default:
-                        return undefined;
-                }
-            }
-            function checkAssignmentOperator(valueType) {
-                if (produceDiagnostics && operator >= 56 && operator <= 68) {
-                    var ok = checkReferenceExpression(left, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property);
-                    if (ok) {
-                        checkTypeAssignableTo(valueType, leftType, left, undefined);
-                    }
-                }
-            }
-            function reportOperatorError() {
-                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
-            }
-        }
-        function isYieldExpressionInClass(node) {
-            var current = node;
-            var parent = node.parent;
-            while (parent) {
-                if (ts.isFunctionLike(parent) && current === parent.body) {
-                    return false;
-                }
-                else if (ts.isClassLike(current)) {
-                    return true;
-                }
-                current = parent;
-                parent = parent.parent;
-            }
-            return false;
-        }
-        function checkYieldExpression(node) {
-            if (produceDiagnostics) {
-                if (!(node.flags & 8388608) || isYieldExpressionInClass(node)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
-                }
-            }
-            if (node.expression) {
-                var func = ts.getContainingFunction(node);
-                if (func && func.asteriskToken) {
-                    var expressionType = checkExpressionCached(node.expression, undefined);
-                    var expressionElementType = void 0;
-                    var nodeIsYieldStar = !!node.asteriskToken;
-                    if (nodeIsYieldStar) {
-                        expressionElementType = checkElementTypeOfIterable(expressionType, node.expression);
-                    }
-                    if (func.type) {
-                        var signatureElementType = getElementTypeOfIterableIterator(getTypeFromTypeNode(func.type)) || anyType;
-                        if (nodeIsYieldStar) {
-                            checkTypeAssignableTo(expressionElementType, signatureElementType, node.expression, undefined);
-                        }
-                        else {
-                            checkTypeAssignableTo(expressionType, signatureElementType, node.expression, undefined);
-                        }
-                    }
-                }
-            }
-            return anyType;
-        }
-        function checkConditionalExpression(node, contextualMapper) {
-            checkExpression(node.condition);
-            var type1 = checkExpression(node.whenTrue, contextualMapper);
-            var type2 = checkExpression(node.whenFalse, contextualMapper);
-            return getUnionType([type1, type2]);
-        }
-        function checkStringLiteralExpression(node) {
-            var contextualType = getContextualType(node);
-            if (contextualType && contextualTypeIsStringLiteralType(contextualType)) {
-                return getStringLiteralTypeForText(node.text);
-            }
-            return stringType;
-        }
-        function checkTemplateExpression(node) {
-            ts.forEach(node.templateSpans, function (templateSpan) {
-                checkExpression(templateSpan.expression);
-            });
-            return stringType;
-        }
-        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
-            var saveContextualType = node.contextualType;
-            node.contextualType = contextualType;
-            var result = checkExpression(node, contextualMapper);
-            node.contextualType = saveContextualType;
-            return result;
-        }
-        function checkExpressionCached(node, contextualMapper) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var saveFlowLoopStart = flowLoopStart;
-                flowLoopStart = flowLoopCount;
-                links.resolvedType = checkExpression(node, contextualMapper);
-                flowLoopStart = saveFlowLoopStart;
-            }
-            return links.resolvedType;
-        }
-        function checkPropertyAssignment(node, contextualMapper) {
-            if (node.name.kind === 140) {
-                checkComputedPropertyName(node.name);
-            }
-            return checkExpression(node.initializer, contextualMapper);
-        }
-        function checkObjectLiteralMethod(node, contextualMapper) {
-            checkGrammarMethod(node);
-            if (node.name.kind === 140) {
-                checkComputedPropertyName(node.name);
-            }
-            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
-        }
-        function instantiateTypeWithSingleGenericCallSignature(node, type, contextualMapper) {
-            if (isInferentialContext(contextualMapper)) {
-                var signature = getSingleCallSignature(type);
-                if (signature && signature.typeParameters) {
-                    var contextualType = getApparentTypeOfContextualType(node);
-                    if (contextualType) {
-                        var contextualSignature = getSingleCallSignature(contextualType);
-                        if (contextualSignature && !contextualSignature.typeParameters) {
-                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper));
-                        }
-                    }
-                }
-            }
-            return type;
-        }
-        function checkExpression(node, contextualMapper) {
-            var type;
-            if (node.kind === 139) {
-                type = checkQualifiedName(node);
-            }
-            else {
-                var uninstantiatedType = checkExpressionWorker(node, contextualMapper);
-                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
-            }
-            if (isConstEnumObjectType(type)) {
-                var ok = (node.parent.kind === 172 && node.parent.expression === node) ||
-                    (node.parent.kind === 173 && node.parent.expression === node) ||
-                    ((node.kind === 69 || node.kind === 139) && isInRightSideOfImportOrExportAssignment(node));
-                if (!ok) {
-                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
-                }
-            }
-            return type;
-        }
-        function checkNumericLiteral(node) {
-            checkGrammarNumericLiteral(node);
-            return numberType;
-        }
-        function checkExpressionWorker(node, contextualMapper) {
-            switch (node.kind) {
-                case 69:
-                    return checkIdentifier(node);
-                case 97:
-                    return checkThisExpression(node);
-                case 95:
-                    return checkSuperExpression(node);
-                case 93:
-                    return nullType;
-                case 99:
-                case 84:
-                    return booleanType;
-                case 8:
-                    return checkNumericLiteral(node);
-                case 189:
-                    return checkTemplateExpression(node);
-                case 9:
-                    return checkStringLiteralExpression(node);
-                case 11:
-                    return stringType;
-                case 10:
-                    return globalRegExpType;
-                case 170:
-                    return checkArrayLiteral(node, contextualMapper);
-                case 171:
-                    return checkObjectLiteral(node, contextualMapper);
-                case 172:
-                    return checkPropertyAccessExpression(node);
-                case 173:
-                    return checkIndexedAccess(node);
-                case 174:
-                case 175:
-                    return checkCallExpression(node);
-                case 176:
-                    return checkTaggedTemplateExpression(node);
-                case 178:
-                    return checkExpression(node.expression, contextualMapper);
-                case 192:
-                    return checkClassExpression(node);
-                case 179:
-                case 180:
-                    return checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-                case 182:
-                    return checkTypeOfExpression(node);
-                case 177:
-                case 195:
-                    return checkAssertion(node);
-                case 196:
-                    return checkNonNullAssertion(node);
-                case 181:
-                    return checkDeleteExpression(node);
-                case 183:
-                    return checkVoidExpression(node);
-                case 184:
-                    return checkAwaitExpression(node);
-                case 185:
-                    return checkPrefixUnaryExpression(node);
-                case 186:
-                    return checkPostfixUnaryExpression(node);
-                case 187:
-                    return checkBinaryExpression(node, contextualMapper);
-                case 188:
-                    return checkConditionalExpression(node, contextualMapper);
-                case 191:
-                    return checkSpreadElementExpression(node, contextualMapper);
-                case 193:
-                    return undefinedType;
-                case 190:
-                    return checkYieldExpression(node);
-                case 248:
-                    return checkJsxExpression(node);
-                case 241:
-                    return checkJsxElement(node);
-                case 242:
-                    return checkJsxSelfClosingElement(node);
-                case 243:
-                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
-            }
-            return unknownType;
-        }
-        function checkTypeParameter(node) {
-            if (node.expression) {
-                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
-            }
-            checkSourceElement(node.constraint);
-            getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node)));
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
-            }
-        }
-        function checkParameter(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkVariableLikeDeclaration(node);
-            var func = ts.getContainingFunction(node);
-            if (node.flags & 92) {
-                func = ts.getContainingFunction(node);
-                if (!(func.kind === 148 && ts.nodeIsPresent(func.body))) {
-                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
-                }
-            }
-            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
-                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
-            }
-            if (node.name.text === "this") {
-                if (ts.indexOf(func.parameters, node) !== 0) {
-                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
-                }
-                if (func.kind === 148 || func.kind === 152 || func.kind === 157) {
-                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
-                }
-            }
-            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
-                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
-            }
-        }
-        function isSyntacticallyValidGenerator(node) {
-            if (!node.asteriskToken || !node.body) {
-                return false;
-            }
-            return node.kind === 147 ||
-                node.kind === 220 ||
-                node.kind === 179;
-        }
-        function getTypePredicateParameterIndex(parameterList, parameter) {
-            if (parameterList) {
-                for (var i = 0; i < parameterList.length; i++) {
-                    var param = parameterList[i];
-                    if (param.name.kind === 69 &&
-                        param.name.text === parameter.text) {
-                        return i;
-                    }
-                }
-            }
-            return -1;
-        }
-        function checkTypePredicate(node) {
-            var parent = getTypePredicateParent(node);
-            if (!parent) {
-                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
-                return;
-            }
-            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
-            if (!typePredicate) {
-                return;
-            }
-            var parameterName = node.parameterName;
-            if (ts.isThisTypePredicate(typePredicate)) {
-                getTypeFromThisTypeNode(parameterName);
-            }
-            else {
-                if (typePredicate.parameterIndex >= 0) {
-                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
-                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
-                    }
-                    else {
-                        var leadingError = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
-                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, undefined, leadingError);
-                    }
-                }
-                else if (parameterName) {
-                    var hasReportedError = false;
-                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
-                        var name_14 = _a[_i].name;
-                        if (ts.isBindingPattern(name_14) &&
-                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_14, parameterName, typePredicate.parameterName)) {
-                            hasReportedError = true;
-                            break;
-                        }
-                    }
-                    if (!hasReportedError) {
-                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
-                    }
-                }
-            }
-        }
-        function getTypePredicateParent(node) {
-            switch (node.parent.kind) {
-                case 180:
-                case 151:
-                case 220:
-                case 179:
-                case 156:
-                case 147:
-                case 146:
-                    var parent_10 = node.parent;
-                    if (node === parent_10.type) {
-                        return parent_10;
-                    }
-            }
-        }
-        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
-            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
-                var name_15 = _a[_i].name;
-                if (name_15.kind === 69 &&
-                    name_15.text === predicateVariableName) {
-                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
-                    return true;
-                }
-                else if (name_15.kind === 168 ||
-                    name_15.kind === 167) {
-                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_15, predicateVariableNode, predicateVariableName)) {
-                        return true;
-                    }
-                }
-            }
-        }
-        function checkSignatureDeclaration(node) {
-            if (node.kind === 153) {
-                checkGrammarIndexSignature(node);
-            }
-            else if (node.kind === 156 || node.kind === 220 || node.kind === 157 ||
-                node.kind === 151 || node.kind === 148 ||
-                node.kind === 152) {
-                checkGrammarFunctionLikeDeclaration(node);
-            }
-            checkTypeParameters(node.typeParameters);
-            ts.forEach(node.parameters, checkParameter);
-            if (node.type) {
-                checkSourceElement(node.type);
-            }
-            if (produceDiagnostics) {
-                checkCollisionWithArgumentsInGeneratedCode(node);
-                if (compilerOptions.noImplicitAny && !node.type) {
-                    switch (node.kind) {
-                        case 152:
-                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
-                        case 151:
-                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
-                    }
-                }
-                if (node.type) {
-                    if (languageVersion >= 2 && isSyntacticallyValidGenerator(node)) {
-                        var returnType = getTypeFromTypeNode(node.type);
-                        if (returnType === voidType) {
-                            error(node.type, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
-                        }
-                        else {
-                            var generatorElementType = getElementTypeOfIterableIterator(returnType) || anyType;
-                            var iterableIteratorInstantiation = createIterableIteratorType(generatorElementType);
-                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, node.type);
-                        }
-                    }
-                    else if (ts.isAsyncFunctionLike(node)) {
-                        checkAsyncFunctionReturnType(node);
-                    }
-                }
-            }
-        }
-        function checkClassForDuplicateDeclarations(node) {
-            var getter = 1, setter = 2, property = getter | setter;
-            var instanceNames = {};
-            var staticNames = {};
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind === 148) {
-                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
-                        var param = _c[_b];
-                        if (ts.isParameterPropertyDeclaration(param)) {
-                            addName(instanceNames, param.name, param.name.text, property);
-                        }
-                    }
-                }
-                else {
-                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113; });
-                    var names = static ? staticNames : instanceNames;
-                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
-                    if (memberName) {
-                        switch (member.kind) {
-                            case 149:
-                                addName(names, member.name, memberName, getter);
-                                break;
-                            case 150:
-                                addName(names, member.name, memberName, setter);
-                                break;
-                            case 145:
-                                addName(names, member.name, memberName, property);
-                                break;
-                        }
-                    }
-                }
-            }
-            function addName(names, location, name, meaning) {
-                if (ts.hasProperty(names, name)) {
-                    var prev = names[name];
-                    if (prev & meaning) {
-                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
-                    }
-                    else {
-                        names[name] = prev | meaning;
-                    }
-                }
-                else {
-                    names[name] = meaning;
-                }
-            }
-        }
-        function checkObjectTypeForDuplicateDeclarations(node) {
-            var names = {};
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind == 144) {
-                    var memberName = void 0;
-                    switch (member.name.kind) {
-                        case 9:
-                        case 8:
-                        case 69:
-                            memberName = member.name.text;
-                            break;
-                        default:
-                            continue;
-                    }
-                    if (ts.hasProperty(names, memberName)) {
-                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
-                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
-                    }
-                    else {
-                        names[memberName] = true;
-                    }
-                }
-            }
-        }
-        function checkTypeForDuplicateIndexSignatures(node) {
-            if (node.kind === 222) {
-                var nodeSymbol = getSymbolOfNode(node);
-                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
-                    return;
-                }
-            }
-            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
-            if (indexSymbol) {
-                var seenNumericIndexer = false;
-                var seenStringIndexer = false;
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var declaration = decl;
-                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
-                        switch (declaration.parameters[0].type.kind) {
-                            case 132:
-                                if (!seenStringIndexer) {
-                                    seenStringIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
-                                }
-                                break;
-                            case 130:
-                                if (!seenNumericIndexer) {
-                                    seenNumericIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
-                                }
-                                break;
-                        }
-                    }
-                }
-            }
-        }
-        function checkPropertyDeclaration(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
-            checkVariableLikeDeclaration(node);
-        }
-        function checkMethodDeclaration(node) {
-            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
-            checkFunctionOrMethodDeclaration(node);
-            if (node.flags & 128 && node.body) {
-                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
-            }
-        }
-        function checkConstructorDeclaration(node) {
-            checkSignatureDeclaration(node);
-            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
-            checkSourceElement(node.body);
-            var symbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
-            if (node === firstDeclaration) {
-                checkFunctionOrConstructorSymbol(symbol);
-            }
-            if (ts.nodeIsMissing(node.body)) {
-                return;
-            }
-            if (!produceDiagnostics) {
-                return;
-            }
-            function containsSuperCallAsComputedPropertyName(n) {
-                return n.name && containsSuperCall(n.name);
-            }
-            function containsSuperCall(n) {
-                if (ts.isSuperCallExpression(n)) {
-                    return true;
-                }
-                else if (ts.isFunctionLike(n)) {
-                    return false;
-                }
-                else if (ts.isClassLike(n)) {
-                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
-                }
-                return ts.forEachChild(n, containsSuperCall);
-            }
-            function markThisReferencesAsErrors(n) {
-                if (n.kind === 97) {
-                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
-                }
-                else if (n.kind !== 179 && n.kind !== 220) {
-                    ts.forEachChild(n, markThisReferencesAsErrors);
-                }
-            }
-            function isInstancePropertyWithInitializer(n) {
-                return n.kind === 145 &&
-                    !(n.flags & 32) &&
-                    !!n.initializer;
-            }
-            var containingClassDecl = node.parent;
-            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
-                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
-                var superCall = getSuperCallInConstructor(node);
-                if (superCall) {
-                    if (classExtendsNull) {
-                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
-                    }
-                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
-                        ts.forEach(node.parameters, function (p) { return p.flags & 92; });
-                    if (superCallShouldBeFirst) {
-                        var statements = node.body.statements;
-                        var superCallStatement = void 0;
-                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
-                            var statement = statements_2[_i];
-                            if (statement.kind === 202 && ts.isSuperCallExpression(statement.expression)) {
-                                superCallStatement = statement;
-                                break;
-                            }
-                            if (!ts.isPrologueDirective(statement)) {
-                                break;
-                            }
-                        }
-                        if (!superCallStatement) {
-                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
-                        }
-                    }
-                }
-                else if (!classExtendsNull) {
-                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
-                }
-            }
-        }
-        function checkAccessorDeclaration(node) {
-            if (produceDiagnostics) {
-                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
-                checkDecorators(node);
-                checkSignatureDeclaration(node);
-                if (node.kind === 149) {
-                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 32768)) {
-                        if (node.flags & 65536) {
-                            if (compilerOptions.noImplicitReturns) {
-                                error(node.name, ts.Diagnostics.Not_all_code_paths_return_a_value);
-                            }
-                        }
-                        else {
-                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
-                        }
-                    }
-                }
-                if (node.name.kind === 140) {
-                    checkComputedPropertyName(node.name);
-                }
-                if (!ts.hasDynamicName(node)) {
-                    var otherKind = node.kind === 149 ? 150 : 149;
-                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
-                    if (otherAccessor) {
-                        if (((node.flags & 28) !== (otherAccessor.flags & 28))) {
-                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
-                        }
-                        if (((node.flags & 128) !== (otherAccessor.flags & 128))) {
-                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
-                        }
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorThisType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
-                    }
-                }
-                getTypeOfAccessors(getSymbolOfNode(node));
-            }
-            if (node.parent.kind !== 171) {
-                checkSourceElement(node.body);
-            }
-            else {
-                checkNodeDeferred(node);
-            }
-        }
-        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
-            var firstType = getAnnotatedType(first);
-            var secondType = getAnnotatedType(second);
-            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
-                error(first, message);
-            }
-        }
-        function checkAccessorDeferred(node) {
-            checkSourceElement(node.body);
-        }
-        function checkMissingDeclaration(node) {
-            checkDecorators(node);
-        }
-        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
-            var typeArguments;
-            var mapper;
-            var result = true;
-            for (var i = 0; i < typeParameters.length; i++) {
-                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                if (constraint) {
-                    if (!typeArguments) {
-                        typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
-                        mapper = createTypeMapper(typeParameters, typeArguments);
-                    }
-                    var typeArgument = typeArguments[i];
-                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
-                }
-            }
-            return result;
-        }
-        function checkTypeReferenceNode(node) {
-            checkGrammarTypeArguments(node, node.typeArguments);
-            var type = getTypeFromTypeReference(node);
-            if (type !== unknownType && node.typeArguments) {
-                ts.forEach(node.typeArguments, checkSourceElement);
-                if (produceDiagnostics) {
-                    var symbol = getNodeLinks(node).resolvedSymbol;
-                    var typeParameters = symbol.flags & 524288 ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
-                    checkTypeArgumentConstraints(typeParameters, node.typeArguments);
-                }
-            }
-        }
-        function checkTypeQuery(node) {
-            getTypeFromTypeQueryNode(node);
-        }
-        function checkTypeLiteral(node) {
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-                checkObjectTypeForDuplicateDeclarations(node);
-            }
-        }
-        function checkArrayType(node) {
-            checkSourceElement(node.elementType);
-        }
-        function checkTupleType(node) {
-            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
-            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
-                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
-            }
-            ts.forEach(node.elementTypes, checkSourceElement);
-        }
-        function checkUnionOrIntersectionType(node) {
-            ts.forEach(node.types, checkSourceElement);
-        }
-        function isPrivateWithinAmbient(node) {
-            return (node.flags & 8) && ts.isInAmbientContext(node);
-        }
-        function getEffectiveDeclarationFlags(n, flagsToCheck) {
-            var flags = ts.getCombinedNodeFlags(n);
-            if (n.parent.kind !== 222 &&
-                n.parent.kind !== 221 &&
-                n.parent.kind !== 192 &&
-                ts.isInAmbientContext(n)) {
-                if (!(flags & 2)) {
-                    flags |= 1;
-                }
-                flags |= 2;
-            }
-            return flags & flagsToCheck;
-        }
-        function checkFunctionOrConstructorSymbol(symbol) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            function getCanonicalOverload(overloads, implementation) {
-                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
-                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
-            }
-            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
-                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
-                if (someButNotAllOverloadFlags !== 0) {
-                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
-                    ts.forEach(overloads, function (o) {
-                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
-                        if (deviation & 1) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
-                        }
-                        else if (deviation & 2) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
-                        }
-                        else if (deviation & (8 | 16)) {
-                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
-                        }
-                        else if (deviation & 128) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
-                        }
-                    });
-                }
-            }
-            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
-                if (someHaveQuestionToken !== allHaveQuestionToken) {
-                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
-                    ts.forEach(overloads, function (o) {
-                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
-                        if (deviation) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
-                        }
-                    });
-                }
-            }
-            var flagsToCheck = 1 | 2 | 8 | 16 | 128;
-            var someNodeFlags = 0;
-            var allNodeFlags = flagsToCheck;
-            var someHaveQuestionToken = false;
-            var allHaveQuestionToken = true;
-            var hasOverloads = false;
-            var bodyDeclaration;
-            var lastSeenNonAmbientDeclaration;
-            var previousDeclaration;
-            var declarations = symbol.declarations;
-            var isConstructor = (symbol.flags & 16384) !== 0;
-            function reportImplementationExpectedError(node) {
-                if (node.name && ts.nodeIsMissing(node.name)) {
-                    return;
-                }
-                var seen = false;
-                var subsequentNode = ts.forEachChild(node.parent, function (c) {
-                    if (seen) {
-                        return c;
-                    }
-                    else {
-                        seen = c === node;
-                    }
-                });
-                if (subsequentNode && subsequentNode.pos === node.end) {
-                    if (subsequentNode.kind === node.kind) {
-                        var errorNode_1 = subsequentNode.name || subsequentNode;
-                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
-                            var reportError = (node.kind === 147 || node.kind === 146) &&
-                                (node.flags & 32) !== (subsequentNode.flags & 32);
-                            if (reportError) {
-                                var diagnostic = node.flags & 32 ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
-                                error(errorNode_1, diagnostic);
-                            }
-                            return;
-                        }
-                        else if (ts.nodeIsPresent(subsequentNode.body)) {
-                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
-                            return;
-                        }
-                    }
-                }
-                var errorNode = node.name || node;
-                if (isConstructor) {
-                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
-                }
-                else {
-                    if (node.flags & 128) {
-                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
-                    }
-                    else {
-                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
-                    }
-                }
-            }
-            var isExportSymbolInsideModule = symbol.parent && symbol.parent.flags & 1536;
-            var duplicateFunctionDeclaration = false;
-            var multipleConstructorImplementation = false;
-            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
-                var current = declarations_4[_i];
-                var node = current;
-                var inAmbientContext = ts.isInAmbientContext(node);
-                var inAmbientContextOrInterface = node.parent.kind === 222 || node.parent.kind === 159 || inAmbientContext;
-                if (inAmbientContextOrInterface) {
-                    previousDeclaration = undefined;
-                }
-                if (node.kind === 220 || node.kind === 147 || node.kind === 146 || node.kind === 148) {
-                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
-                    someNodeFlags |= currentNodeFlags;
-                    allNodeFlags &= currentNodeFlags;
-                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
-                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
-                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
-                        if (isConstructor) {
-                            multipleConstructorImplementation = true;
-                        }
-                        else {
-                            duplicateFunctionDeclaration = true;
-                        }
-                    }
-                    else if (!isExportSymbolInsideModule && previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
-                        reportImplementationExpectedError(previousDeclaration);
-                    }
-                    if (ts.nodeIsPresent(node.body)) {
-                        if (!bodyDeclaration) {
-                            bodyDeclaration = node;
-                        }
-                    }
-                    else {
-                        hasOverloads = true;
-                    }
-                    previousDeclaration = node;
-                    if (!inAmbientContextOrInterface) {
-                        lastSeenNonAmbientDeclaration = node;
-                    }
-                }
-            }
-            if (multipleConstructorImplementation) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
-                });
-            }
-            if (duplicateFunctionDeclaration) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
-                });
-            }
-            if (!isExportSymbolInsideModule && lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
-                !(lastSeenNonAmbientDeclaration.flags & 128) && !lastSeenNonAmbientDeclaration.questionToken) {
-                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
-            }
-            if (hasOverloads) {
-                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
-                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
-                if (bodyDeclaration) {
-                    var signatures = getSignaturesOfSymbol(symbol);
-                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
-                    for (var _a = 0, signatures_3 = signatures; _a < signatures_3.length; _a++) {
-                        var signature = signatures_3[_a];
-                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
-                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
-                            break;
-                        }
-                    }
-                }
-            }
-        }
-        function checkExportsOnMergedDeclarations(node) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            var symbol = node.localSymbol;
-            if (!symbol) {
-                symbol = getSymbolOfNode(node);
-                if (!(symbol.flags & 7340032)) {
-                    return;
-                }
-            }
-            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
-                return;
-            }
-            var exportedDeclarationSpaces = 0;
-            var nonExportedDeclarationSpaces = 0;
-            var defaultExportedDeclarationSpaces = 0;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var d = _a[_i];
-                var declarationSpaces = getDeclarationSpaces(d);
-                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 | 512);
-                if (effectiveDeclarationFlags & 1) {
-                    if (effectiveDeclarationFlags & 512) {
-                        defaultExportedDeclarationSpaces |= declarationSpaces;
-                    }
-                    else {
-                        exportedDeclarationSpaces |= declarationSpaces;
-                    }
-                }
-                else {
-                    nonExportedDeclarationSpaces |= declarationSpaces;
-                }
-            }
-            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
-            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
-                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
-                    var d = _c[_b];
-                    var declarationSpaces = getDeclarationSpaces(d);
-                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
-                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
-                    }
-                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
-                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
-                    }
-                }
-            }
-            function getDeclarationSpaces(d) {
-                switch (d.kind) {
-                    case 222:
-                        return 2097152;
-                    case 225:
-                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0
-                            ? 4194304 | 1048576
-                            : 4194304;
-                    case 221:
-                    case 224:
-                        return 2097152 | 1048576;
-                    case 229:
-                        var result_1 = 0;
-                        var target = resolveAlias(getSymbolOfNode(d));
-                        ts.forEach(target.declarations, function (d) { result_1 |= getDeclarationSpaces(d); });
-                        return result_1;
-                    default:
-                        return 1048576;
-                }
-            }
-        }
-        function checkNonThenableType(type, location, message) {
-            type = getWidenedType(type);
-            if (!isTypeAny(type) && isTypeAssignableTo(type, getGlobalThenableType())) {
-                if (location) {
-                    if (!message) {
-                        message = ts.Diagnostics.Operand_for_await_does_not_have_a_valid_callable_then_member;
-                    }
-                    error(location, message);
-                }
-                return unknownType;
-            }
-            return type;
-        }
-        function getPromisedType(promise) {
-            if (promise.flags & 1) {
-                return undefined;
-            }
-            if ((promise.flags & 4096) && promise.target === tryGetGlobalPromiseType()) {
-                return promise.typeArguments[0];
-            }
-            var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType();
-            if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) {
-                return undefined;
-            }
-            var thenFunction = getTypeOfPropertyOfType(promise, "then");
-            if (thenFunction && (thenFunction.flags & 1)) {
-                return undefined;
-            }
-            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0) : emptyArray;
-            if (thenSignatures.length === 0) {
-                return undefined;
-            }
-            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072);
-            if (onfulfilledParameterType.flags & 1) {
-                return undefined;
-            }
-            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0);
-            if (onfulfilledParameterSignatures.length === 0) {
-                return undefined;
-            }
-            var valueParameterType = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature));
-            return valueParameterType;
-        }
-        function getTypeOfFirstParameterOfSignature(signature) {
-            return getTypeAtPosition(signature, 0);
-        }
-        function getAwaitedType(type) {
-            return checkAwaitedType(type, undefined, undefined);
-        }
-        function checkAwaitedType(type, location, message) {
-            return checkAwaitedTypeWorker(type);
-            function checkAwaitedTypeWorker(type) {
-                if (type.flags & 16384) {
-                    var types = [];
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var constituentType = _a[_i];
-                        types.push(checkAwaitedTypeWorker(constituentType));
-                    }
-                    return getUnionType(types);
-                }
-                else {
-                    var promisedType = getPromisedType(type);
-                    if (promisedType === undefined) {
-                        return checkNonThenableType(type, location, message);
-                    }
-                    else {
-                        if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
-                            if (location) {
-                                error(location, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method, symbolToString(type.symbol));
-                            }
-                            return unknownType;
-                        }
-                        awaitedTypeStack.push(type.id);
-                        var awaitedType = checkAwaitedTypeWorker(promisedType);
-                        awaitedTypeStack.pop();
-                        return awaitedType;
-                    }
-                }
-            }
-        }
-        function checkCorrectPromiseType(returnType, location) {
-            if (returnType === unknownType) {
-                return unknownType;
-            }
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType === emptyGenericType
-                || globalPromiseType === getTargetType(returnType)) {
-                return checkAwaitedType(returnType, location, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-            }
-            error(location, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
-            return unknownType;
-        }
-        function checkAsyncFunctionReturnType(node) {
-            if (languageVersion >= 2) {
-                var returnType = getTypeFromTypeNode(node.type);
-                return checkCorrectPromiseType(returnType, node.type);
-            }
-            var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType();
-            if (globalPromiseConstructorLikeType === emptyObjectType) {
-                return unknownType;
-            }
-            var promiseType = getTypeFromTypeNode(node.type);
-            if (promiseType === unknownType && compilerOptions.isolatedModules) {
-                return unknownType;
-            }
-            var promiseConstructor = getNodeLinks(node.type).resolvedSymbol;
-            if (!promiseConstructor || !symbolIsValue(promiseConstructor)) {
-                var typeName = promiseConstructor
-                    ? symbolToString(promiseConstructor)
-                    : typeToString(promiseType);
-                error(node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName);
-                return unknownType;
-            }
-            checkReturnTypeAnnotationAsExpression(node);
-            var promiseConstructorType = getTypeOfSymbol(promiseConstructor);
-            if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) {
-                return unknownType;
-            }
-            var promiseName = ts.getEntityNameFromTypeNode(node.type);
-            var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName);
-            var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455);
-            if (rootSymbol) {
-                error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor));
-                return unknownType;
-            }
-            return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-        }
-        function checkDecorator(node) {
-            var signature = getResolvedSignature(node);
-            var returnType = getReturnTypeOfSignature(signature);
-            if (returnType.flags & 1) {
-                return;
-            }
-            var expectedReturnType;
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            var errorInfo;
-            switch (node.parent.kind) {
-                case 221:
-                    var classSymbol = getSymbolOfNode(node.parent);
-                    var classConstructorType = getTypeOfSymbol(classSymbol);
-                    expectedReturnType = getUnionType([classConstructorType, voidType]);
-                    break;
-                case 142:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 145:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 147:
-                case 149:
-                case 150:
-                    var methodType = getTypeOfNode(node.parent);
-                    var descriptorType = createTypedPropertyDescriptorType(methodType);
-                    expectedReturnType = getUnionType([descriptorType, voidType]);
-                    break;
-            }
-            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
-        }
-        function checkTypeNodeAsExpression(node) {
-            if (node && node.kind === 155) {
-                var root = getFirstIdentifier(node.typeName);
-                var meaning = root.parent.kind === 155 ? 793056 : 1536;
-                var rootSymbol = resolveName(root, root.text, meaning | 8388608, undefined, undefined);
-                if (rootSymbol && rootSymbol.flags & 8388608) {
-                    var aliasTarget = resolveAlias(rootSymbol);
-                    if (aliasTarget.flags & 107455 && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
-                        markAliasSymbolAsReferenced(rootSymbol);
-                    }
-                }
-            }
-        }
-        function checkTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        function checkReturnTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        function checkParameterTypeAnnotationsAsExpressions(node) {
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                checkTypeAnnotationAsExpression(parameter);
-            }
-        }
-        function checkDecorators(node) {
-            if (!node.decorators) {
-                return;
-            }
-            if (!ts.nodeCanBeDecorated(node)) {
-                return;
-            }
-            if (!compilerOptions.experimentalDecorators) {
-                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
-            }
-            if (compilerOptions.emitDecoratorMetadata) {
-                switch (node.kind) {
-                    case 221:
-                        var constructor = ts.getFirstConstructorWithBody(node);
-                        if (constructor) {
-                            checkParameterTypeAnnotationsAsExpressions(constructor);
-                        }
-                        break;
-                    case 147:
-                    case 149:
-                    case 150:
-                        checkParameterTypeAnnotationsAsExpressions(node);
-                        checkReturnTypeAnnotationAsExpression(node);
-                        break;
-                    case 145:
-                    case 142:
-                        checkTypeAnnotationAsExpression(node);
-                        break;
-                }
-            }
-            ts.forEach(node.decorators, checkDecorator);
-        }
-        function checkFunctionDeclaration(node) {
-            if (produceDiagnostics) {
-                checkFunctionOrMethodDeclaration(node) || checkGrammarForGenerator(node);
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-        }
-        function checkFunctionOrMethodDeclaration(node) {
-            checkDecorators(node);
-            checkSignatureDeclaration(node);
-            var isAsync = ts.isAsyncFunctionLike(node);
-            if (node.name && node.name.kind === 140) {
-                checkComputedPropertyName(node.name);
-            }
-            if (!ts.hasDynamicName(node)) {
-                var symbol = getSymbolOfNode(node);
-                var localSymbol = node.localSymbol || symbol;
-                var firstDeclaration = ts.forEach(localSymbol.declarations, function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
-                    declaration : undefined; });
-                if (node === firstDeclaration) {
-                    checkFunctionOrConstructorSymbol(localSymbol);
-                }
-                if (symbol.parent) {
-                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
-                        checkFunctionOrConstructorSymbol(symbol);
-                    }
-                }
-            }
-            checkSourceElement(node.body);
-            if (!node.asteriskToken) {
-                var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (produceDiagnostics && !node.type) {
-                if (compilerOptions.noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
-                    reportImplicitAnyError(node, anyType);
-                }
-                if (node.asteriskToken && ts.nodeIsPresent(node.body)) {
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
-                }
-            }
-        }
-        function checkBlock(node) {
-            if (node.kind === 199) {
-                checkGrammarStatementInAmbientContext(node);
-            }
-            ts.forEach(node.statements, checkSourceElement);
-        }
-        function checkCollisionWithArgumentsInGeneratedCode(node) {
-            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
-                return;
-            }
-            ts.forEach(node.parameters, function (p) {
-                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
-                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
-                }
-            });
-        }
-        function needCollisionCheckForIdentifier(node, identifier, name) {
-            if (!(identifier && identifier.text === name)) {
-                return false;
-            }
-            if (node.kind === 145 ||
-                node.kind === 144 ||
-                node.kind === 147 ||
-                node.kind === 146 ||
-                node.kind === 149 ||
-                node.kind === 150) {
-                return false;
-            }
-            if (ts.isInAmbientContext(node)) {
-                return false;
-            }
-            var root = ts.getRootDeclaration(node);
-            if (root.kind === 142 && ts.nodeIsMissing(root.parent.body)) {
-                return false;
-            }
-            return true;
-        }
-        function checkCollisionWithCapturedThisVariable(node, name) {
-            if (needCollisionCheckForIdentifier(node, name, "_this")) {
-                potentialThisCollisions.push(node);
-            }
-        }
-        function checkIfThisIsCapturedInEnclosingScope(node) {
-            var current = node;
-            while (current) {
-                if (getNodeCheckFlags(current) & 4) {
-                    var isDeclaration_1 = node.kind !== 69;
-                    if (isDeclaration_1) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
-                    }
-                    else {
-                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
-                    }
-                    return;
-                }
-                current = current.parent;
-            }
-        }
-        function checkCollisionWithCapturedSuperVariable(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
-                return;
-            }
-            var enclosingClass = ts.getContainingClass(node);
-            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
-                return;
-            }
-            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
-                var isDeclaration_2 = node.kind !== 69;
-                if (isDeclaration_2) {
-                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
-                }
-                else {
-                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
-                }
-            }
-        }
-        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
-                return;
-            }
-            if (node.kind === 225 && ts.getModuleInstanceState(node) !== 1) {
-                return;
-            }
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 && ts.isExternalOrCommonJsModule(parent)) {
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
-            }
-        }
-        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "Promise")) {
-                return;
-            }
-            if (node.kind === 225 && ts.getModuleInstanceState(node) !== 1) {
-                return;
-            }
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 && ts.isExternalOrCommonJsModule(parent) && parent.flags & 2097152) {
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
-            }
-        }
-        function checkVarDeclaredNamesNotShadowed(node) {
-            if ((ts.getCombinedNodeFlags(node) & 3072) !== 0 || ts.isParameterDeclaration(node)) {
-                return;
-            }
-            if (node.kind === 218 && !node.initializer) {
-                return;
-            }
-            var symbol = getSymbolOfNode(node);
-            if (symbol.flags & 1) {
-                var localDeclarationSymbol = resolveName(node, node.name.text, 3, undefined, undefined);
-                if (localDeclarationSymbol &&
-                    localDeclarationSymbol !== symbol &&
-                    localDeclarationSymbol.flags & 2) {
-                    if (getDeclarationFlagsFromSymbol(localDeclarationSymbol) & 3072) {
-                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 219);
-                        var container = varDeclList.parent.kind === 200 && varDeclList.parent.parent
-                            ? varDeclList.parent.parent
-                            : undefined;
-                        var namesShareScope = container &&
-                            (container.kind === 199 && ts.isFunctionLike(container.parent) ||
-                                container.kind === 226 ||
-                                container.kind === 225 ||
-                                container.kind === 256);
-                        if (!namesShareScope) {
-                            var name_16 = symbolToString(localDeclarationSymbol);
-                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_16, name_16);
-                        }
-                    }
-                }
-            }
-        }
-        function checkParameterInitializer(node) {
-            if (ts.getRootDeclaration(node).kind !== 142) {
-                return;
-            }
-            var func = ts.getContainingFunction(node);
-            visit(node.initializer);
-            function visit(n) {
-                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
-                    return;
-                }
-                if (n.kind === 172) {
-                    return visit(n.expression);
-                }
-                else if (n.kind === 69) {
-                    var symbol = resolveName(n, n.text, 107455 | 8388608, undefined, undefined);
-                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
-                        return;
-                    }
-                    if (symbol.valueDeclaration === node) {
-                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
-                        return;
-                    }
-                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (enclosingContainer === func) {
-                        if (symbol.valueDeclaration.kind === 142) {
-                            if (symbol.valueDeclaration.pos < node.pos) {
-                                return;
-                            }
-                            var current = n;
-                            while (current !== node.initializer) {
-                                if (ts.isFunctionLike(current.parent)) {
-                                    return;
-                                }
-                                if (current.parent.kind === 145 &&
-                                    !(current.parent.flags & 32) &&
-                                    ts.isClassLike(current.parent.parent)) {
-                                    return;
-                                }
-                                current = current.parent;
-                            }
-                        }
-                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
-                    }
-                }
-                else {
-                    return ts.forEachChild(n, visit);
-                }
-            }
-        }
-        function checkVariableLikeDeclaration(node) {
-            checkDecorators(node);
-            checkSourceElement(node.type);
-            if (node.name.kind === 140) {
-                checkComputedPropertyName(node.name);
-                if (node.initializer) {
-                    checkExpressionCached(node.initializer);
-                }
-            }
-            if (node.kind === 169) {
-                if (node.propertyName && node.propertyName.kind === 140) {
-                    checkComputedPropertyName(node.propertyName);
-                }
-                var parent_11 = node.parent.parent;
-                var parentType = getTypeForBindingElementParent(parent_11);
-                var name_17 = node.propertyName || node.name;
-                var property = getPropertyOfType(parentType, getTextOfPropertyName(name_17));
-                if (parent_11.initializer && property && getParentOfSymbol(property)) {
-                    checkClassPropertyAccess(parent_11, parent_11.initializer, parentType, property);
-                }
-            }
-            if (ts.isBindingPattern(node.name)) {
-                ts.forEach(node.name.elements, checkSourceElement);
-            }
-            if (node.initializer && ts.getRootDeclaration(node).kind === 142 && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
-                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
-                return;
-            }
-            if (ts.isBindingPattern(node.name)) {
-                if (node.initializer && node.parent.parent.kind !== 207) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, undefined);
-                    checkParameterInitializer(node);
-                }
-                return;
-            }
-            var symbol = getSymbolOfNode(node);
-            var type = getTypeOfVariableOrParameterOrProperty(symbol);
-            if (node === symbol.valueDeclaration) {
-                if (node.initializer && node.parent.parent.kind !== 207) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, undefined);
-                    checkParameterInitializer(node);
-                }
-            }
-            else {
-                var declarationType = getWidenedTypeForVariableLikeDeclaration(node);
-                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
-                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
-                }
-                if (node.initializer) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, undefined);
-                }
-                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
-                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
-                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
-                }
-            }
-            if (node.kind !== 145 && node.kind !== 144) {
-                checkExportsOnMergedDeclarations(node);
-                if (node.kind === 218 || node.kind === 169) {
-                    checkVarDeclaredNamesNotShadowed(node);
-                }
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-        }
-        function areDeclarationFlagsIdentical(left, right) {
-            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
-                return false;
-            }
-            var interestingFlags = 8 |
-                16 |
-                256 |
-                128 |
-                64 |
-                32;
-            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
-        }
-        function checkVariableDeclaration(node) {
-            checkGrammarVariableDeclaration(node);
-            return checkVariableLikeDeclaration(node);
-        }
-        function checkBindingElement(node) {
-            checkGrammarBindingElement(node);
-            return checkVariableLikeDeclaration(node);
-        }
-        function checkVariableStatement(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
-            ts.forEach(node.declarationList.declarations, checkSourceElement);
-        }
-        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
-            if (node.modifiers && node.parent.kind === 171) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    if (node.modifiers.length > 1) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                }
-                else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                }
-            }
-        }
-        function checkExpressionStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-        }
-        function checkIfStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.thenStatement);
-            if (node.thenStatement.kind === 201) {
-                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
-            }
-            checkSourceElement(node.elseStatement);
-        }
-        function checkDoStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkSourceElement(node.statement);
-            checkExpression(node.expression);
-        }
-        function checkWhileStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.statement);
-        }
-        function checkForStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.initializer && node.initializer.kind === 219) {
-                    checkGrammarVariableDeclarationList(node.initializer);
-                }
-            }
-            if (node.initializer) {
-                if (node.initializer.kind === 219) {
-                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
-                }
-                else {
-                    checkExpression(node.initializer);
-                }
-            }
-            if (node.condition)
-                checkExpression(node.condition);
-            if (node.incrementor)
-                checkExpression(node.incrementor);
-            checkSourceElement(node.statement);
-        }
-        function checkForOfStatement(node) {
-            checkGrammarForInOrForOfStatement(node);
-            if (node.initializer.kind === 219) {
-                checkForInOrForOfVariableDeclaration(node);
-            }
-            else {
-                var varExpr = node.initializer;
-                var iteratedType = checkRightHandSideOfForOf(node.expression);
-                if (varExpr.kind === 170 || varExpr.kind === 171) {
-                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
-                }
-                else {
-                    var leftType = checkExpression(varExpr);
-                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_of_statement, ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property);
-                    if (iteratedType) {
-                        checkTypeAssignableTo(iteratedType, leftType, varExpr, undefined);
-                    }
-                }
-            }
-            checkSourceElement(node.statement);
-        }
-        function checkForInStatement(node) {
-            checkGrammarForInOrForOfStatement(node);
-            if (node.initializer.kind === 219) {
-                var variable = node.initializer.declarations[0];
-                if (variable && ts.isBindingPattern(variable.name)) {
-                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
-                }
-                checkForInOrForOfVariableDeclaration(node);
-            }
-            else {
-                var varExpr = node.initializer;
-                var leftType = checkExpression(varExpr);
-                if (varExpr.kind === 170 || varExpr.kind === 171) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
-                }
-                else if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258)) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
-                }
-                else {
-                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_in_statement, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property);
-                }
-            }
-            var rightType = checkNonNullExpression(node.expression);
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 | 512)) {
-                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            checkSourceElement(node.statement);
-        }
-        function checkForInOrForOfVariableDeclaration(iterationStatement) {
-            var variableDeclarationList = iterationStatement.initializer;
-            if (variableDeclarationList.declarations.length >= 1) {
-                var decl = variableDeclarationList.declarations[0];
-                checkVariableDeclaration(decl);
-            }
-        }
-        function checkRightHandSideOfForOf(rhsExpression) {
-            var expressionType = checkNonNullExpression(rhsExpression);
-            return checkIteratedTypeOrElementType(expressionType, rhsExpression, true);
-        }
-        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput) {
-            if (isTypeAny(inputType)) {
-                return inputType;
-            }
-            if (languageVersion >= 2) {
-                return checkElementTypeOfIterable(inputType, errorNode);
-            }
-            if (allowStringInput) {
-                return checkElementTypeOfArrayOrString(inputType, errorNode);
-            }
-            if (isArrayLikeType(inputType)) {
-                var indexType = getIndexTypeOfType(inputType, 1);
-                if (indexType) {
-                    return indexType;
-                }
-            }
-            if (errorNode) {
-                error(errorNode, ts.Diagnostics.Type_0_is_not_an_array_type, typeToString(inputType));
-            }
-            return unknownType;
-        }
-        function checkElementTypeOfIterable(iterable, errorNode) {
-            var elementType = getElementTypeOfIterable(iterable, errorNode);
-            if (errorNode && elementType) {
-                checkTypeAssignableTo(iterable, createIterableType(elementType), errorNode);
-            }
-            return elementType || anyType;
-        }
-        function getElementTypeOfIterable(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            var typeAsIterable = type;
-            if (!typeAsIterable.iterableElementType) {
-                if ((type.flags & 4096) && type.target === getGlobalIterableType()) {
-                    typeAsIterable.iterableElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorFunction = getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator"));
-                    if (isTypeAny(iteratorFunction)) {
-                        return undefined;
-                    }
-                    var iteratorFunctionSignatures = iteratorFunction ? getSignaturesOfType(iteratorFunction, 0) : emptyArray;
-                    if (iteratorFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
-                        }
-                        return undefined;
-                    }
-                    typeAsIterable.iterableElementType = getElementTypeOfIterator(getUnionType(ts.map(iteratorFunctionSignatures, getReturnTypeOfSignature)), errorNode);
-                }
-            }
-            return typeAsIterable.iterableElementType;
-        }
-        function getElementTypeOfIterator(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            var typeAsIterator = type;
-            if (!typeAsIterator.iteratorElementType) {
-                if ((type.flags & 4096) && type.target === getGlobalIteratorType()) {
-                    typeAsIterator.iteratorElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorNextFunction = getTypeOfPropertyOfType(type, "next");
-                    if (isTypeAny(iteratorNextFunction)) {
-                        return undefined;
-                    }
-                    var iteratorNextFunctionSignatures = iteratorNextFunction ? getSignaturesOfType(iteratorNextFunction, 0) : emptyArray;
-                    if (iteratorNextFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.An_iterator_must_have_a_next_method);
-                        }
-                        return undefined;
-                    }
-                    var iteratorNextResult = getUnionType(ts.map(iteratorNextFunctionSignatures, getReturnTypeOfSignature));
-                    if (isTypeAny(iteratorNextResult)) {
-                        return undefined;
-                    }
-                    var iteratorNextValue = getTypeOfPropertyOfType(iteratorNextResult, "value");
-                    if (!iteratorNextValue) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
-                        }
-                        return undefined;
-                    }
-                    typeAsIterator.iteratorElementType = iteratorNextValue;
-                }
-            }
-            return typeAsIterator.iteratorElementType;
-        }
-        function getElementTypeOfIterableIterator(type) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            if ((type.flags & 4096) && type.target === getGlobalIterableIteratorType()) {
-                return type.typeArguments[0];
-            }
-            return getElementTypeOfIterable(type, undefined) ||
-                getElementTypeOfIterator(type, undefined);
-        }
-        function checkElementTypeOfArrayOrString(arrayOrStringType, errorNode) {
-            ts.Debug.assert(languageVersion < 2);
-            var arrayType = arrayOrStringType;
-            if (arrayOrStringType.flags & 16384) {
-                arrayType = getUnionType(ts.filter(arrayOrStringType.types, function (t) { return !(t.flags & 258); }));
-            }
-            else if (arrayOrStringType.flags & 258) {
-                arrayType = neverType;
-            }
-            var hasStringConstituent = arrayOrStringType !== arrayType;
-            var reportedError = false;
-            if (hasStringConstituent) {
-                if (languageVersion < 1) {
-                    error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
-                    reportedError = true;
-                }
-                if (arrayType === neverType) {
-                    return stringType;
-                }
-            }
-            if (!isArrayLikeType(arrayType)) {
-                if (!reportedError) {
-                    var diagnostic = hasStringConstituent
-                        ? ts.Diagnostics.Type_0_is_not_an_array_type
-                        : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
-                    error(errorNode, diagnostic, typeToString(arrayType));
-                }
-                return hasStringConstituent ? stringType : unknownType;
-            }
-            var arrayElementType = getIndexTypeOfType(arrayType, 1) || unknownType;
-            if (hasStringConstituent) {
-                if (arrayElementType.flags & 258) {
-                    return stringType;
-                }
-                return getUnionType([arrayElementType, stringType]);
-            }
-            return arrayElementType;
-        }
-        function checkBreakOrContinueStatement(node) {
-            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
-        }
-        function isGetAccessorWithAnnotatedSetAccessor(node) {
-            return !!(node.kind === 149 && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 150)));
-        }
-        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
-            var unwrappedReturnType = ts.isAsyncFunctionLike(func) ? getPromisedType(returnType) : returnType;
-            return maybeTypeOfKind(unwrappedReturnType, 16 | 1);
-        }
-        function checkReturnStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var functionBlock = ts.getContainingFunction(node);
-                if (!functionBlock) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
-                }
-            }
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var signature = getSignatureFromDeclaration(func);
-                var returnType = getReturnTypeOfSignature(signature);
-                if (strictNullChecks || node.expression || returnType === neverType) {
-                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
-                    if (func.asteriskToken) {
-                        return;
-                    }
-                    if (func.kind === 150) {
-                        if (node.expression) {
-                            error(node.expression, ts.Diagnostics.Setters_cannot_return_a_value);
-                        }
-                    }
-                    else if (func.kind === 148) {
-                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node.expression)) {
-                            error(node.expression, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
-                        }
-                    }
-                    else if (func.type || isGetAccessorWithAnnotatedSetAccessor(func)) {
-                        if (ts.isAsyncFunctionLike(func)) {
-                            var promisedType = getPromisedType(returnType);
-                            var awaitedType = checkAwaitedType(exprType, node.expression || node, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                            if (promisedType) {
-                                checkTypeAssignableTo(awaitedType, promisedType, node.expression || node);
-                            }
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnType, node.expression || node);
-                        }
-                    }
-                }
-                else if (func.kind !== 148 && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
-                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
-                }
-            }
-        }
-        function checkWithStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.flags & 33554432) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
-                }
-            }
-            checkExpression(node.expression);
-            error(node.expression, ts.Diagnostics.All_symbols_within_a_with_block_will_be_resolved_to_any);
-        }
-        function checkSwitchStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            var firstDefaultClause;
-            var hasDuplicateDefaultClause = false;
-            var expressionType = checkExpression(node.expression);
-            ts.forEach(node.caseBlock.clauses, function (clause) {
-                if (clause.kind === 250 && !hasDuplicateDefaultClause) {
-                    if (firstDefaultClause === undefined) {
-                        firstDefaultClause = clause;
-                    }
-                    else {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
-                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
-                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
-                        hasDuplicateDefaultClause = true;
-                    }
-                }
-                if (produceDiagnostics && clause.kind === 249) {
-                    var caseClause = clause;
-                    var caseType = checkExpression(caseClause.expression);
-                    if (!isTypeComparableTo(expressionType, caseType)) {
-                        checkTypeComparableTo(caseType, expressionType, caseClause.expression, undefined);
-                    }
-                }
-                ts.forEach(clause.statements, checkSourceElement);
-            });
-        }
-        function checkLabeledStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var current = node.parent;
-                while (current) {
-                    if (ts.isFunctionLike(current)) {
-                        break;
-                    }
-                    if (current.kind === 214 && current.label.text === node.label.text) {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
-                        break;
-                    }
-                    current = current.parent;
-                }
-            }
-            checkSourceElement(node.statement);
-        }
-        function checkThrowStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.expression === undefined) {
-                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
-                }
-            }
-            if (node.expression) {
-                checkExpression(node.expression);
-            }
-        }
-        function checkTryStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkBlock(node.tryBlock);
-            var catchClause = node.catchClause;
-            if (catchClause) {
-                if (catchClause.variableDeclaration) {
-                    if (catchClause.variableDeclaration.name.kind !== 69) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.name, ts.Diagnostics.Catch_clause_variable_name_must_be_an_identifier);
-                    }
-                    else if (catchClause.variableDeclaration.type) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
-                    }
-                    else if (catchClause.variableDeclaration.initializer) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
-                    }
-                    else {
-                        var identifierName = catchClause.variableDeclaration.name.text;
-                        var locals = catchClause.block.locals;
-                        if (locals && ts.hasProperty(locals, identifierName)) {
-                            var localSymbol = locals[identifierName];
-                            if (localSymbol && (localSymbol.flags & 2) !== 0) {
-                                grammarErrorOnNode(localSymbol.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, identifierName);
-                            }
-                        }
-                    }
-                }
-                checkBlock(catchClause.block);
-            }
-            if (node.finallyBlock) {
-                checkBlock(node.finallyBlock);
-            }
-        }
-        function checkIndexConstraints(type) {
-            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1);
-            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0);
-            var stringIndexType = getIndexTypeOfType(type, 0);
-            var numberIndexType = getIndexTypeOfType(type, 1);
-            if (stringIndexType || numberIndexType) {
-                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
-                    var propType = getTypeOfSymbol(prop);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1);
-                });
-                if (type.flags & 1024 && ts.isClassLike(type.symbol.valueDeclaration)) {
-                    var classDeclaration = type.symbol.valueDeclaration;
-                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
-                        var member = _a[_i];
-                        if (!(member.flags & 32) && ts.hasDynamicName(member)) {
-                            var propType = getTypeOfSymbol(member.symbol);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1);
-                        }
-                    }
-                }
-            }
-            var errorNode;
-            if (stringIndexType && numberIndexType) {
-                errorNode = declaredNumberIndexer || declaredStringIndexer;
-                if (!errorNode && (type.flags & 2048)) {
-                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0) && getIndexTypeOfType(base, 1); });
-                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
-                }
-            }
-            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
-                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
-            }
-            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
-                if (!indexType) {
-                    return;
-                }
-                if (indexKind === 1 && !isNumericName(prop.valueDeclaration.name)) {
-                    return;
-                }
-                var errorNode;
-                if (prop.valueDeclaration.name.kind === 140 || prop.parent === containingType.symbol) {
-                    errorNode = prop.valueDeclaration;
-                }
-                else if (indexDeclaration) {
-                    errorNode = indexDeclaration;
-                }
-                else if (containingType.flags & 2048) {
-                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
-                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
-                }
-                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
-                    var errorMessage = indexKind === 0
-                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
-                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
-                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
-                }
-            }
-        }
-        function checkTypeNameIsReserved(name, message) {
-            switch (name.text) {
-                case "any":
-                case "number":
-                case "boolean":
-                case "string":
-                case "symbol":
-                case "void":
-                    error(name, message, name.text);
-            }
-        }
-        function checkTypeParameters(typeParameterDeclarations) {
-            if (typeParameterDeclarations) {
-                for (var i = 0, n = typeParameterDeclarations.length; i < n; i++) {
-                    var node = typeParameterDeclarations[i];
-                    checkTypeParameter(node);
-                    if (produceDiagnostics) {
-                        for (var j = 0; j < i; j++) {
-                            if (typeParameterDeclarations[j].symbol === node.symbol) {
-                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        function checkTypeParameterListsIdentical(node, symbol) {
-            if (symbol.declarations.length === 1) {
-                return;
-            }
-            var firstDecl;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 221 || declaration.kind === 222) {
-                    if (!firstDecl) {
-                        firstDecl = declaration;
-                    }
-                    else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) {
-                        error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text);
-                    }
-                }
-            }
-        }
-        function checkClassExpression(node) {
-            checkClassLikeDeclaration(node);
-            checkNodeDeferred(node);
-            return getTypeOfSymbol(getSymbolOfNode(node));
-        }
-        function checkClassExpressionDeferred(node) {
-            ts.forEach(node.members, checkSourceElement);
-        }
-        function checkClassDeclaration(node) {
-            if (!node.name && !(node.flags & 512)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
-            }
-            checkClassLikeDeclaration(node);
-            ts.forEach(node.members, checkSourceElement);
-        }
-        function checkClassLikeDeclaration(node) {
-            checkGrammarClassDeclarationHeritageClauses(node);
-            checkDecorators(node);
-            if (node.name) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-            checkTypeParameters(node.typeParameters);
-            checkExportsOnMergedDeclarations(node);
-            var symbol = getSymbolOfNode(node);
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var typeWithThis = getTypeWithThisArgument(type);
-            var staticType = getTypeOfSymbol(symbol);
-            checkTypeParameterListsIdentical(node, symbol);
-            checkClassForDuplicateDeclarations(node);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                var baseTypes = getBaseTypes(type);
-                if (baseTypes.length && produceDiagnostics) {
-                    var baseType_1 = baseTypes[0];
-                    var staticBaseType = getBaseConstructorTypeOfClass(type);
-                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
-                    checkSourceElement(baseTypeNode.expression);
-                    if (baseTypeNode.typeArguments) {
-                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
-                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments); _i < _a.length; _i++) {
-                            var constructor = _a[_i];
-                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
-                                break;
-                            }
-                        }
-                    }
-                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
-                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
-                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32)) {
-                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
-                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
-                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
-                        }
-                    }
-                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
-                }
-            }
-            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
-            if (implementedTypeNodes) {
-                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
-                    var typeRefNode = implementedTypeNodes_1[_b];
-                    if (!ts.isSupportedExpressionWithTypeArguments(typeRefNode)) {
-                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
-                    }
-                    checkTypeReferenceNode(typeRefNode);
-                    if (produceDiagnostics) {
-                        var t = getTypeFromTypeNode(typeRefNode);
-                        if (t !== unknownType) {
-                            var declaredType = (t.flags & 4096) ? t.target : t;
-                            if (declaredType.flags & (1024 | 2048)) {
-                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
-                            }
-                            else {
-                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
-                            }
-                        }
-                    }
-                }
-            }
-            if (produceDiagnostics) {
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-            }
-        }
-        function checkBaseTypeAccessibility(type, node) {
-            var signatures = getSignaturesOfType(type, 1);
-            if (signatures.length) {
-                var declaration = signatures[0].declaration;
-                if (declaration && declaration.flags & 8) {
-                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
-                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
-                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, node.expression.text);
-                    }
-                }
-            }
-        }
-        function getTargetSymbol(s) {
-            return s.flags & 16777216 ? getSymbolLinks(s).target : s;
-        }
-        function getClassLikeDeclarationOfSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
-        }
-        function checkKindsOfPropertyMemberOverrides(type, baseType) {
-            var baseProperties = getPropertiesOfObjectType(baseType);
-            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
-                var baseProperty = baseProperties_1[_i];
-                var base = getTargetSymbol(baseProperty);
-                if (base.flags & 134217728) {
-                    continue;
-                }
-                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
-                var baseDeclarationFlags = getDeclarationFlagsFromSymbol(base);
-                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
-                if (derived) {
-                    if (derived === base) {
-                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
-                        if (baseDeclarationFlags & 128 && (!derivedClassDecl || !(derivedClassDecl.flags & 128))) {
-                            if (derivedClassDecl.kind === 192) {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
-                            }
-                            else {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
-                            }
-                        }
-                    }
-                    else {
-                        var derivedDeclarationFlags = getDeclarationFlagsFromSymbol(derived);
-                        if ((baseDeclarationFlags & 8) || (derivedDeclarationFlags & 8)) {
-                            continue;
-                        }
-                        if ((baseDeclarationFlags & 32) !== (derivedDeclarationFlags & 32)) {
-                            continue;
-                        }
-                        if ((base.flags & derived.flags & 8192) || ((base.flags & 98308) && (derived.flags & 98308))) {
-                            continue;
-                        }
-                        var errorMessage = void 0;
-                        if (base.flags & 8192) {
-                            if (derived.flags & 98304) {
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
-                            }
-                            else {
-                                ts.Debug.assert((derived.flags & 4) !== 0);
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
-                            }
-                        }
-                        else if (base.flags & 4) {
-                            ts.Debug.assert((derived.flags & 8192) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        else {
-                            ts.Debug.assert((base.flags & 98304) !== 0);
-                            ts.Debug.assert((derived.flags & 8192) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        error(derived.valueDeclaration.name, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
-                    }
-                }
-            }
-        }
-        function isAccessor(kind) {
-            return kind === 149 || kind === 150;
-        }
-        function areTypeParametersIdentical(list1, list2) {
-            if (!list1 && !list2) {
-                return true;
-            }
-            if (!list1 || !list2 || list1.length !== list2.length) {
-                return false;
-            }
-            for (var i = 0, len = list1.length; i < len; i++) {
-                var tp1 = list1[i];
-                var tp2 = list2[i];
-                if (tp1.name.text !== tp2.name.text) {
-                    return false;
-                }
-                if (!tp1.constraint && !tp2.constraint) {
-                    continue;
-                }
-                if (!tp1.constraint || !tp2.constraint) {
-                    return false;
-                }
-                if (!isTypeIdenticalTo(getTypeFromTypeNode(tp1.constraint), getTypeFromTypeNode(tp2.constraint))) {
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkInheritedPropertiesAreIdentical(type, typeNode) {
-            var baseTypes = getBaseTypes(type);
-            if (baseTypes.length < 2) {
-                return true;
-            }
-            var seen = {};
-            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen[p.name] = { prop: p, containingType: type }; });
-            var ok = true;
-            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
-                var base = baseTypes_2[_i];
-                var properties = getPropertiesOfObjectType(getTypeWithThisArgument(base, type.thisType));
-                for (var _a = 0, properties_4 = properties; _a < properties_4.length; _a++) {
-                    var prop = properties_4[_a];
-                    if (!ts.hasProperty(seen, prop.name)) {
-                        seen[prop.name] = { prop: prop, containingType: base };
-                    }
-                    else {
-                        var existing = seen[prop.name];
-                        var isInheritedProperty = existing.containingType !== type;
-                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
-                            ok = false;
-                            var typeName1 = typeToString(existing.containingType);
-                            var typeName2 = typeToString(base);
-                            var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
-                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
-                        }
-                    }
-                }
-            }
-            return ok;
-        }
-        function checkInterfaceDeclaration(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
-            checkTypeParameters(node.typeParameters);
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                checkTypeParameterListsIdentical(node, symbol);
-                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 222);
-                if (node === firstInterfaceDecl) {
-                    var type = getDeclaredTypeOfSymbol(symbol);
-                    var typeWithThis = getTypeWithThisArgument(type);
-                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
-                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
-                            var baseType = _a[_i];
-                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
-                        }
-                        checkIndexConstraints(type);
-                    }
-                }
-                checkObjectTypeForDuplicateDeclarations(node);
-            }
-            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
-                if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
-                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
-                }
-                checkTypeReferenceNode(heritageElement);
-            });
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                checkTypeForDuplicateIndexSignatures(node);
-            }
-        }
-        function checkTypeAliasDeclaration(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
-            checkSourceElement(node.type);
-        }
-        function computeEnumMemberValues(node) {
-            var nodeLinks = getNodeLinks(node);
-            if (!(nodeLinks.flags & 16384)) {
-                var enumSymbol = getSymbolOfNode(node);
-                var enumType = getDeclaredTypeOfSymbol(enumSymbol);
-                var autoValue = 0;
-                var ambient = ts.isInAmbientContext(node);
-                var enumIsConst = ts.isConst(node);
-                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                    var member = _a[_i];
-                    if (isComputedNonLiteralName(member.name)) {
-                        error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
-                    }
-                    else {
-                        var text = getTextOfPropertyName(member.name);
-                        if (isNumericLiteralName(text)) {
-                            error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
-                        }
-                    }
-                    var previousEnumMemberIsNonConstant = autoValue === undefined;
-                    var initializer = member.initializer;
-                    if (initializer) {
-                        autoValue = computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient);
-                    }
-                    else if (ambient && !enumIsConst) {
-                        autoValue = undefined;
-                    }
-                    else if (previousEnumMemberIsNonConstant) {
-                        error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
-                    }
-                    if (autoValue !== undefined) {
-                        getNodeLinks(member).enumMemberValue = autoValue;
-                        autoValue++;
-                    }
-                }
-                nodeLinks.flags |= 16384;
-            }
-            function computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient) {
-                var reportError = true;
-                var value = evalConstant(initializer);
-                if (reportError) {
-                    if (value === undefined) {
-                        if (enumIsConst) {
-                            error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else if (ambient) {
-                            error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else {
-                            checkTypeAssignableTo(checkExpression(initializer), enumType, initializer, undefined);
-                        }
-                    }
-                    else if (enumIsConst) {
-                        if (isNaN(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN);
-                        }
-                        else if (!isFinite(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
-                        }
-                    }
-                }
-                return value;
-                function evalConstant(e) {
-                    switch (e.kind) {
-                        case 185:
-                            var value_1 = evalConstant(e.operand);
-                            if (value_1 === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operator) {
-                                case 35: return value_1;
-                                case 36: return -value_1;
-                                case 50: return ~value_1;
-                            }
-                            return undefined;
-                        case 187:
-                            var left = evalConstant(e.left);
-                            if (left === undefined) {
-                                return undefined;
-                            }
-                            var right = evalConstant(e.right);
-                            if (right === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operatorToken.kind) {
-                                case 47: return left | right;
-                                case 46: return left & right;
-                                case 44: return left >> right;
-                                case 45: return left >>> right;
-                                case 43: return left << right;
-                                case 48: return left ^ right;
-                                case 37: return left * right;
-                                case 39: return left / right;
-                                case 35: return left + right;
-                                case 36: return left - right;
-                                case 40: return left % right;
-                            }
-                            return undefined;
-                        case 8:
-                            return +e.text;
-                        case 178:
-                            return evalConstant(e.expression);
-                        case 69:
-                        case 173:
-                        case 172:
-                            var member = initializer.parent;
-                            var currentType = getTypeOfSymbol(getSymbolOfNode(member.parent));
-                            var enumType_1;
-                            var propertyName = void 0;
-                            if (e.kind === 69) {
-                                enumType_1 = currentType;
-                                propertyName = e.text;
-                            }
-                            else {
-                                var expression = void 0;
-                                if (e.kind === 173) {
-                                    if (e.argumentExpression === undefined ||
-                                        e.argumentExpression.kind !== 9) {
-                                        return undefined;
-                                    }
-                                    expression = e.expression;
-                                    propertyName = e.argumentExpression.text;
-                                }
-                                else {
-                                    expression = e.expression;
-                                    propertyName = e.name.text;
-                                }
-                                var current = expression;
-                                while (current) {
-                                    if (current.kind === 69) {
-                                        break;
-                                    }
-                                    else if (current.kind === 172) {
-                                        current = current.expression;
-                                    }
-                                    else {
-                                        return undefined;
-                                    }
-                                }
-                                enumType_1 = checkExpression(expression);
-                                if (!(enumType_1.symbol && (enumType_1.symbol.flags & 384))) {
-                                    return undefined;
-                                }
-                            }
-                            if (propertyName === undefined) {
-                                return undefined;
-                            }
-                            var property = getPropertyOfObjectType(enumType_1, propertyName);
-                            if (!property || !(property.flags & 8)) {
-                                return undefined;
-                            }
-                            var propertyDecl = property.valueDeclaration;
-                            if (member === propertyDecl) {
-                                return undefined;
-                            }
-                            if (!isBlockScopedNameDeclaredBeforeUse(propertyDecl, member)) {
-                                reportError = false;
-                                error(e, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
-                                return undefined;
-                            }
-                            return getNodeLinks(propertyDecl).enumMemberValue;
-                    }
-                }
-            }
-        }
-        function checkEnumDeclaration(node) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkExportsOnMergedDeclarations(node);
-            computeEnumMemberValues(node);
-            var enumIsConst = ts.isConst(node);
-            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
-                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
-            }
-            var enumSymbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
-            if (node === firstDeclaration) {
-                if (enumSymbol.declarations.length > 1) {
-                    ts.forEach(enumSymbol.declarations, function (decl) {
-                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
-                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
-                        }
-                    });
-                }
-                var seenEnumMissingInitialInitializer_1 = false;
-                ts.forEach(enumSymbol.declarations, function (declaration) {
-                    if (declaration.kind !== 224) {
-                        return false;
-                    }
-                    var enumDeclaration = declaration;
-                    if (!enumDeclaration.members.length) {
-                        return false;
-                    }
-                    var firstEnumMember = enumDeclaration.members[0];
-                    if (!firstEnumMember.initializer) {
-                        if (seenEnumMissingInitialInitializer_1) {
-                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
-                        }
-                        else {
-                            seenEnumMissingInitialInitializer_1 = true;
-                        }
-                    }
-                });
-            }
-        }
-        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
-            var declarations = symbol.declarations;
-            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
-                var declaration = declarations_5[_i];
-                if ((declaration.kind === 221 ||
-                    (declaration.kind === 220 && ts.nodeIsPresent(declaration.body))) &&
-                    !ts.isInAmbientContext(declaration)) {
-                    return declaration;
-                }
-            }
-            return undefined;
-        }
-        function inSameLexicalScope(node1, node2) {
-            var container1 = ts.getEnclosingBlockScopeContainer(node1);
-            var container2 = ts.getEnclosingBlockScopeContainer(node2);
-            if (isGlobalSourceFile(container1)) {
-                return isGlobalSourceFile(container2);
-            }
-            else if (isGlobalSourceFile(container2)) {
-                return false;
-            }
-            else {
-                return container1 === container2;
-            }
-        }
-        function checkModuleDeclaration(node) {
-            if (produceDiagnostics) {
-                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
-                var inAmbientContext = ts.isInAmbientContext(node);
-                if (isGlobalAugmentation && !inAmbientContext) {
-                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
-                }
-                var isAmbientExternalModule = ts.isAmbientModule(node);
-                var contextErrorMessage = isAmbientExternalModule
-                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
-                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
-                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
-                    return;
-                }
-                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
-                    if (!inAmbientContext && node.name.kind === 9) {
-                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
-                    }
-                }
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                if (symbol.flags & 512
-                    && symbol.declarations.length > 1
-                    && !inAmbientContext
-                    && ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
-                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
-                    if (firstNonAmbientClassOrFunc) {
-                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
-                        }
-                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
-                        }
-                    }
-                    var mergedClass = ts.getDeclarationOfKind(symbol, 221);
-                    if (mergedClass &&
-                        inSameLexicalScope(node, mergedClass)) {
-                        getNodeLinks(node).flags |= 32768;
-                    }
-                }
-                if (isAmbientExternalModule) {
-                    if (ts.isExternalModuleAugmentation(node)) {
-                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432);
-                        if (checkBody) {
-                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
-                                var statement = _a[_i];
-                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
-                            }
-                        }
-                    }
-                    else if (isGlobalSourceFile(node.parent)) {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
-                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
-                        }
-                    }
-                    else {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else {
-                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
-                        }
-                    }
-                }
-            }
-            checkSourceElement(node.body);
-        }
-        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
-            switch (node.kind) {
-                case 200:
-                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
-                        var decl = _a[_i];
-                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
-                    }
-                    break;
-                case 235:
-                case 236:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
-                    break;
-                case 229:
-                case 230:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
-                    break;
-                case 169:
-                case 218:
-                    var name_18 = node.name;
-                    if (ts.isBindingPattern(name_18)) {
-                        for (var _b = 0, _c = name_18.elements; _b < _c.length; _b++) {
-                            var el = _c[_b];
-                            checkModuleAugmentationElement(el, isGlobalAugmentation);
-                        }
-                        break;
-                    }
-                case 221:
-                case 224:
-                case 220:
-                case 222:
-                case 225:
-                case 223:
-                    if (isGlobalAugmentation) {
-                        return;
-                    }
-                    var symbol = getSymbolOfNode(node);
-                    if (symbol) {
-                        var reportError = !(symbol.flags & 33554432);
-                        if (!reportError) {
-                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
-                        }
-                    }
-                    break;
-            }
-        }
-        function getFirstIdentifier(node) {
-            while (true) {
-                if (node.kind === 139) {
-                    node = node.left;
-                }
-                else if (node.kind === 172) {
-                    node = node.expression;
-                }
-                else {
-                    break;
-                }
-            }
-            ts.Debug.assert(node.kind === 69);
-            return node;
-        }
-        function checkExternalImportOrExportDeclaration(node) {
-            var moduleName = ts.getExternalModuleName(node);
-            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9) {
-                error(moduleName, ts.Diagnostics.String_literal_expected);
-                return false;
-            }
-            var inAmbientExternalModule = node.parent.kind === 226 && ts.isAmbientModule(node.parent.parent);
-            if (node.parent.kind !== 256 && !inAmbientExternalModule) {
-                error(moduleName, node.kind === 236 ?
-                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
-                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
-                return false;
-            }
-            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
-                if (!isTopLevelInExternalModuleAugmentation(node)) {
-                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkAliasSymbol(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target !== unknownSymbol) {
-                var excludedMeanings = (symbol.flags & (107455 | 1048576) ? 107455 : 0) |
-                    (symbol.flags & 793056 ? 793056 : 0) |
-                    (symbol.flags & 1536 ? 1536 : 0);
-                if (target.flags & excludedMeanings) {
-                    var message = node.kind === 238 ?
-                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
-                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
-                    error(node, message, symbolToString(symbol));
-                }
-            }
-        }
-        function checkImportBinding(node) {
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkAliasSymbol(node);
-        }
-        function checkImportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
-            }
-            if (checkExternalImportOrExportDeclaration(node)) {
-                var importClause = node.importClause;
-                if (importClause) {
-                    if (importClause.name) {
-                        checkImportBinding(importClause);
-                    }
-                    if (importClause.namedBindings) {
-                        if (importClause.namedBindings.kind === 232) {
-                            checkImportBinding(importClause.namedBindings);
-                        }
-                        else {
-                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
-                        }
-                    }
-                }
-            }
-        }
-        function checkImportEqualsDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                return;
-            }
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
-                checkImportBinding(node);
-                if (node.flags & 1) {
-                    markExportAsReferenced(node);
-                }
-                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    var target = resolveAlias(getSymbolOfNode(node));
-                    if (target !== unknownSymbol) {
-                        if (target.flags & 107455) {
-                            var moduleName = getFirstIdentifier(node.moduleReference);
-                            if (!(resolveEntityName(moduleName, 107455 | 1536).flags & 1536)) {
-                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
-                            }
-                        }
-                        if (target.flags & 793056) {
-                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
-                        }
-                    }
-                }
-                else {
-                    if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
-                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
-                    }
-                }
-            }
-        }
-        function checkExportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
-            }
-            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
-                if (node.exportClause) {
-                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
-                    var inAmbientExternalModule = node.parent.kind === 226 && ts.isAmbientModule(node.parent.parent);
-                    if (node.parent.kind !== 256 && !inAmbientExternalModule) {
-                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
-                    }
-                }
-                else {
-                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
-                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
-                    }
-                }
-            }
-        }
-        function checkGrammarModuleElementContext(node, errorMessage) {
-            if (node.parent.kind !== 256 && node.parent.kind !== 226 && node.parent.kind !== 225) {
-                return grammarErrorOnFirstToken(node, errorMessage);
-            }
-        }
-        function checkExportSpecifier(node) {
-            checkAliasSymbol(node);
-            if (!node.parent.parent.moduleSpecifier) {
-                var exportedName = node.propertyName || node.name;
-                var symbol = resolveName(exportedName, exportedName.text, 107455 | 793056 | 1536 | 8388608, undefined, undefined);
-                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
-                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
-                }
-                else {
-                    markExportAsReferenced(node);
-                }
-            }
-        }
-        function checkExportAssignment(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
-                return;
-            }
-            var container = node.parent.kind === 256 ? node.parent : node.parent.parent;
-            if (container.kind === 225 && !ts.isAmbientModule(container)) {
-                error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
-            }
-            if (node.expression.kind === 69) {
-                markExportAsReferenced(node);
-            }
-            else {
-                checkExpressionCached(node.expression);
-            }
-            checkExternalModuleExports(container);
-            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
-                if (modulekind === ts.ModuleKind.ES6) {
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
-                }
-                else if (modulekind === ts.ModuleKind.System) {
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
-                }
-            }
-        }
-        function hasExportedMembers(moduleSymbol) {
-            for (var id in moduleSymbol.exports) {
-                if (id !== "export=") {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function checkExternalModuleExports(node) {
-            var moduleSymbol = getSymbolOfNode(node);
-            var links = getSymbolLinks(moduleSymbol);
-            if (!links.exportsChecked) {
-                var exportEqualsSymbol = moduleSymbol.exports["export="];
-                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
-                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
-                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
-                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
-                    }
-                }
-                var exports_2 = getExportsOfModule(moduleSymbol);
-                for (var id in exports_2) {
-                    if (id === "__export") {
-                        continue;
-                    }
-                    var _a = exports_2[id], declarations = _a.declarations, flags = _a.flags;
-                    if (flags & (1536 | 64 | 384)) {
-                        continue;
-                    }
-                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
-                    if (flags & 524288 && exportedDeclarationsCount <= 2) {
-                        continue;
-                    }
-                    if (exportedDeclarationsCount > 1) {
-                        for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
-                            var declaration = declarations_6[_i];
-                            if (isNotOverload(declaration)) {
-                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
-                            }
-                        }
-                    }
-                }
-                links.exportsChecked = true;
-            }
-            function isNotOverload(declaration) {
-                return declaration.kind !== 220 || !!declaration.body;
-            }
-        }
-        function checkSourceElement(node) {
-            if (!node) {
-                return;
-            }
-            var kind = node.kind;
-            if (cancellationToken) {
-                switch (kind) {
-                    case 225:
-                    case 221:
-                    case 222:
-                    case 220:
-                        cancellationToken.throwIfCancellationRequested();
-                }
-            }
-            switch (kind) {
-                case 141:
-                    return checkTypeParameter(node);
-                case 142:
-                    return checkParameter(node);
-                case 145:
-                case 144:
-                    return checkPropertyDeclaration(node);
-                case 156:
-                case 157:
-                case 151:
-                case 152:
-                    return checkSignatureDeclaration(node);
-                case 153:
-                    return checkSignatureDeclaration(node);
-                case 147:
-                case 146:
-                    return checkMethodDeclaration(node);
-                case 148:
-                    return checkConstructorDeclaration(node);
-                case 149:
-                case 150:
-                    return checkAccessorDeclaration(node);
-                case 155:
-                    return checkTypeReferenceNode(node);
-                case 154:
-                    return checkTypePredicate(node);
-                case 158:
-                    return checkTypeQuery(node);
-                case 159:
-                    return checkTypeLiteral(node);
-                case 160:
-                    return checkArrayType(node);
-                case 161:
-                    return checkTupleType(node);
-                case 162:
-                case 163:
-                    return checkUnionOrIntersectionType(node);
-                case 164:
-                    return checkSourceElement(node.type);
-                case 220:
-                    return checkFunctionDeclaration(node);
-                case 199:
-                case 226:
-                    return checkBlock(node);
-                case 200:
-                    return checkVariableStatement(node);
-                case 202:
-                    return checkExpressionStatement(node);
-                case 203:
-                    return checkIfStatement(node);
-                case 204:
-                    return checkDoStatement(node);
-                case 205:
-                    return checkWhileStatement(node);
-                case 206:
-                    return checkForStatement(node);
-                case 207:
-                    return checkForInStatement(node);
-                case 208:
-                    return checkForOfStatement(node);
-                case 209:
-                case 210:
-                    return checkBreakOrContinueStatement(node);
-                case 211:
-                    return checkReturnStatement(node);
-                case 212:
-                    return checkWithStatement(node);
-                case 213:
-                    return checkSwitchStatement(node);
-                case 214:
-                    return checkLabeledStatement(node);
-                case 215:
-                    return checkThrowStatement(node);
-                case 216:
-                    return checkTryStatement(node);
-                case 218:
-                    return checkVariableDeclaration(node);
-                case 169:
-                    return checkBindingElement(node);
-                case 221:
-                    return checkClassDeclaration(node);
-                case 222:
-                    return checkInterfaceDeclaration(node);
-                case 223:
-                    return checkTypeAliasDeclaration(node);
-                case 224:
-                    return checkEnumDeclaration(node);
-                case 225:
-                    return checkModuleDeclaration(node);
-                case 230:
-                    return checkImportDeclaration(node);
-                case 229:
-                    return checkImportEqualsDeclaration(node);
-                case 236:
-                    return checkExportDeclaration(node);
-                case 235:
-                    return checkExportAssignment(node);
-                case 201:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 217:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 239:
-                    return checkMissingDeclaration(node);
-            }
-        }
-        function checkNodeDeferred(node) {
-            if (deferredNodes) {
-                deferredNodes.push(node);
-            }
-        }
-        function checkDeferredNodes() {
-            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
-                var node = deferredNodes_1[_i];
-                switch (node.kind) {
-                    case 179:
-                    case 180:
-                    case 147:
-                    case 146:
-                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
-                        break;
-                    case 149:
-                    case 150:
-                        checkAccessorDeferred(node);
-                        break;
-                    case 192:
-                        checkClassExpressionDeferred(node);
-                        break;
-                }
-            }
-        }
-        function checkSourceFile(node) {
-            var start = new Date().getTime();
-            checkSourceFileWorker(node);
-            ts.checkTime += new Date().getTime() - start;
-        }
-        function checkSourceFileWorker(node) {
-            var links = getNodeLinks(node);
-            if (!(links.flags & 1)) {
-                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
-                    return;
-                }
-                checkGrammarSourceFile(node);
-                potentialThisCollisions.length = 0;
-                deferredNodes = [];
-                ts.forEach(node.statements, checkSourceElement);
-                checkDeferredNodes();
-                deferredNodes = undefined;
-                if (ts.isExternalOrCommonJsModule(node)) {
-                    checkExternalModuleExports(node);
-                }
-                if (potentialThisCollisions.length) {
-                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
-                    potentialThisCollisions.length = 0;
-                }
-                links.flags |= 1;
-            }
-        }
-        function getDiagnostics(sourceFile, ct) {
-            try {
-                cancellationToken = ct;
-                return getDiagnosticsWorker(sourceFile);
-            }
-            finally {
-                cancellationToken = undefined;
-            }
-        }
-        function getDiagnosticsWorker(sourceFile) {
-            throwIfNonDiagnosticsProducing();
-            if (sourceFile) {
-                checkSourceFile(sourceFile);
-                return diagnostics.getDiagnostics(sourceFile.fileName);
-            }
-            ts.forEach(host.getSourceFiles(), checkSourceFile);
-            return diagnostics.getDiagnostics();
-        }
-        function getGlobalDiagnostics() {
-            throwIfNonDiagnosticsProducing();
-            return diagnostics.getGlobalDiagnostics();
-        }
-        function throwIfNonDiagnosticsProducing() {
-            if (!produceDiagnostics) {
-                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
-            }
-        }
-        function isInsideWithStatementBody(node) {
-            if (node) {
-                while (node.parent) {
-                    if (node.parent.kind === 212 && node.parent.statement === node) {
-                        return true;
-                    }
-                    node = node.parent;
-                }
-            }
-            return false;
-        }
-        function getSymbolsInScope(location, meaning) {
-            var symbols = {};
-            var memberFlags = 0;
-            if (isInsideWithStatementBody(location)) {
-                return [];
-            }
-            populateSymbols();
-            return symbolsToArray(symbols);
-            function populateSymbols() {
-                while (location) {
-                    if (location.locals && !isGlobalSourceFile(location)) {
-                        copySymbols(location.locals, meaning);
-                    }
-                    switch (location.kind) {
-                        case 256:
-                            if (!ts.isExternalOrCommonJsModule(location)) {
-                                break;
-                            }
-                        case 225:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931);
-                            break;
-                        case 224:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8);
-                            break;
-                        case 192:
-                            var className = location.name;
-                            if (className) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                        case 221:
-                        case 222:
-                            if (!(memberFlags & 32)) {
-                                copySymbols(getSymbolOfNode(location).members, meaning & 793056);
-                            }
-                            break;
-                        case 179:
-                            var funcName = location.name;
-                            if (funcName) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                            break;
-                    }
-                    if (ts.introducesArgumentsExoticObject(location)) {
-                        copySymbol(argumentsSymbol, meaning);
-                    }
-                    memberFlags = location.flags;
-                    location = location.parent;
-                }
-                copySymbols(globals, meaning);
-            }
-            function copySymbol(symbol, meaning) {
-                if (symbol.flags & meaning) {
-                    var id = symbol.name;
-                    if (!ts.hasProperty(symbols, id)) {
-                        symbols[id] = symbol;
-                    }
-                }
-            }
-            function copySymbols(source, meaning) {
-                if (meaning) {
-                    for (var id in source) {
-                        var symbol = source[id];
-                        copySymbol(symbol, meaning);
-                    }
-                }
-            }
-        }
-        function isTypeDeclarationName(name) {
-            return name.kind === 69 &&
-                isTypeDeclaration(name.parent) &&
-                name.parent.name === name;
-        }
-        function isTypeDeclaration(node) {
-            switch (node.kind) {
-                case 141:
-                case 221:
-                case 222:
-                case 223:
-                case 224:
-                    return true;
-            }
-        }
-        function isTypeReferenceIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 139) {
-                node = node.parent;
-            }
-            return node.parent && node.parent.kind === 155;
-        }
-        function isHeritageClauseElementIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 172) {
-                node = node.parent;
-            }
-            return node.parent && node.parent.kind === 194;
-        }
-        function forEachEnclosingClass(node, callback) {
-            var result;
-            while (true) {
-                node = ts.getContainingClass(node);
-                if (!node)
-                    break;
-                if (result = callback(node))
-                    break;
-            }
-            return result;
-        }
-        function isNodeWithinClass(node, classDeclaration) {
-            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
-        }
-        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
-            while (nodeOnRightSide.parent.kind === 139) {
-                nodeOnRightSide = nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 229) {
-                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 235) {
-                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
-            }
-            return undefined;
-        }
-        function isInRightSideOfImportOrExportAssignment(node) {
-            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
-        }
-        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
-            if (ts.isDeclarationName(entityName)) {
-                return getSymbolOfNode(entityName.parent);
-            }
-            if (ts.isInJavaScriptFile(entityName) && entityName.parent.kind === 172) {
-                var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
-                switch (specialPropertyAssignmentKind) {
-                    case 1:
-                    case 3:
-                        return getSymbolOfNode(entityName.parent);
-                    case 4:
-                    case 2:
-                        return getSymbolOfNode(entityName.parent.parent);
-                    default:
-                }
-            }
-            if (entityName.parent.kind === 235) {
-                return resolveEntityName(entityName, 107455 | 793056 | 1536 | 8388608);
-            }
-            if (entityName.kind !== 172) {
-                if (isInRightSideOfImportOrExportAssignment(entityName)) {
-                    return getSymbolOfPartOfRightHandSideOfImportEquals(entityName);
-                }
-            }
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
-            }
-            if (isHeritageClauseElementIdentifier(entityName)) {
-                var meaning = 0;
-                if (entityName.parent.kind === 194) {
-                    meaning = 793056;
-                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                        meaning |= 107455;
-                    }
-                }
-                else {
-                    meaning = 1536;
-                }
-                meaning |= 8388608;
-                return resolveEntityName(entityName, meaning);
-            }
-            else if (ts.isExpression(entityName)) {
-                if (ts.nodeIsMissing(entityName)) {
-                    return undefined;
-                }
-                if (entityName.kind === 69) {
-                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
-                        return getIntrinsicTagSymbol(entityName.parent);
-                    }
-                    var meaning = 107455 | 8388608;
-                    return resolveEntityName(entityName, meaning);
-                }
-                else if (entityName.kind === 172) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkPropertyAccessExpression(entityName);
-                    }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
-                else if (entityName.kind === 139) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkQualifiedName(entityName);
-                    }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
-            }
-            else if (isTypeReferenceIdentifier(entityName)) {
-                var meaning = entityName.parent.kind === 155 ? 793056 : 1536;
-                meaning |= 8388608;
-                return resolveEntityName(entityName, meaning);
-            }
-            else if (entityName.parent.kind === 246) {
-                return getJsxAttributePropertySymbol(entityName.parent);
-            }
-            if (entityName.parent.kind === 154) {
-                return resolveEntityName(entityName, 1);
-            }
-            return undefined;
-        }
-        function getSymbolAtLocation(node) {
-            if (node.kind === 256) {
-                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
-            }
-            if (isInsideWithStatementBody(node)) {
-                return undefined;
-            }
-            if (ts.isDeclarationName(node)) {
-                return getSymbolOfNode(node.parent);
-            }
-            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
-                return getSymbolOfNode(node.parent.parent);
-            }
-            if (node.kind === 69) {
-                if (isInRightSideOfImportOrExportAssignment(node)) {
-                    return node.parent.kind === 235
-                        ? getSymbolOfEntityNameOrPropertyAccessExpression(node)
-                        : getSymbolOfPartOfRightHandSideOfImportEquals(node);
-                }
-                else if (node.parent.kind === 169 &&
-                    node.parent.parent.kind === 167 &&
-                    node === node.parent.propertyName) {
-                    var typeOfPattern = getTypeOfNode(node.parent.parent);
-                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
-                    if (propertyDeclaration) {
-                        return propertyDeclaration;
-                    }
-                }
-            }
-            switch (node.kind) {
-                case 69:
-                case 172:
-                case 139:
-                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
-                case 97:
-                case 95:
-                    var type = ts.isExpression(node) ? checkExpression(node) : getTypeFromTypeNode(node);
-                    return type.symbol;
-                case 165:
-                    return getTypeFromTypeNode(node).symbol;
-                case 121:
-                    var constructorDeclaration = node.parent;
-                    if (constructorDeclaration && constructorDeclaration.kind === 148) {
-                        return constructorDeclaration.parent.symbol;
-                    }
-                    return undefined;
-                case 9:
-                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
-                        ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
-                        ((node.parent.kind === 230 || node.parent.kind === 236) &&
-                            node.parent.moduleSpecifier === node)) {
-                        return resolveExternalModuleName(node, node);
-                    }
-                case 8:
-                    if (node.parent.kind === 173 && node.parent.argumentExpression === node) {
-                        var objectType = checkExpression(node.parent.expression);
-                        if (objectType === unknownType)
-                            return undefined;
-                        var apparentType = getApparentType(objectType);
-                        if (apparentType === unknownType)
-                            return undefined;
-                        return getPropertyOfType(apparentType, node.text);
-                    }
-                    break;
-            }
-            return undefined;
-        }
-        function getShorthandAssignmentValueSymbol(location) {
-            if (location && location.kind === 254) {
-                return resolveEntityName(location.name, 107455 | 8388608);
-            }
-            return undefined;
-        }
-        function getExportSpecifierLocalTargetSymbol(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 | 793056 | 1536 | 8388608);
-        }
-        function getTypeOfNode(node) {
-            if (isInsideWithStatementBody(node)) {
-                return unknownType;
-            }
-            if (ts.isTypeNode(node)) {
-                return getTypeFromTypeNode(node);
-            }
-            if (ts.isExpression(node)) {
-                return getTypeOfExpression(node);
-            }
-            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
-                return getBaseTypes(getDeclaredTypeOfSymbol(getSymbolOfNode(node.parent.parent)))[0];
-            }
-            if (isTypeDeclaration(node)) {
-                var symbol = getSymbolOfNode(node);
-                return getDeclaredTypeOfSymbol(symbol);
-            }
-            if (isTypeDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getDeclaredTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclaration(node)) {
-                var symbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getTypeOfSymbol(symbol);
-            }
-            if (ts.isBindingPattern(node)) {
-                return getTypeForVariableLikeDeclaration(node.parent, true);
-            }
-            if (isInRightSideOfImportOrExportAssignment(node)) {
-                var symbol = getSymbolAtLocation(node);
-                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
-                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
-            }
-            return unknownType;
-        }
-        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
-            ts.Debug.assert(expr.kind === 171 || expr.kind === 170);
-            if (expr.parent.kind === 208) {
-                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
-            }
-            if (expr.parent.kind === 187) {
-                var iteratedType = checkExpression(expr.parent.right);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
-            }
-            if (expr.parent.kind === 253) {
-                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
-                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
-            }
-            ts.Debug.assert(expr.parent.kind === 170);
-            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
-            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, false) || unknownType;
-            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
-        }
-        function getPropertySymbolOfDestructuringAssignment(location) {
-            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
-            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
-        }
-        function getTypeOfExpression(expr) {
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
-                expr = expr.parent;
-            }
-            return checkExpression(expr);
-        }
-        function getParentTypeOfClassElement(node) {
-            var classSymbol = getSymbolOfNode(node.parent);
-            return node.flags & 32
-                ? getTypeOfSymbol(classSymbol)
-                : getDeclaredTypeOfSymbol(classSymbol);
-        }
-        function getAugmentedPropertiesOfType(type) {
-            type = getApparentType(type);
-            var propsByName = createSymbolTable(getPropertiesOfType(type));
-            if (getSignaturesOfType(type, 0).length || getSignaturesOfType(type, 1).length) {
-                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
-                    if (!ts.hasProperty(propsByName, p.name)) {
-                        propsByName[p.name] = p;
-                    }
-                });
-            }
-            return getNamedMembers(propsByName);
-        }
-        function getRootSymbols(symbol) {
-            if (symbol.flags & 268435456) {
-                var symbols_3 = [];
-                var name_19 = symbol.name;
-                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
-                    var symbol = getPropertyOfType(t, name_19);
-                    if (symbol) {
-                        symbols_3.push(symbol);
-                    }
-                });
-                return symbols_3;
-            }
-            else if (symbol.flags & 67108864) {
-                var target = void 0;
-                var next = symbol;
-                while (next = getSymbolLinks(next).target) {
-                    target = next;
-                }
-                if (target) {
-                    return [target];
-                }
-            }
-            return [symbol];
-        }
-        function isArgumentsLocalBinding(node) {
-            return getReferencedValueSymbol(node) === argumentsSymbol;
-        }
-        function moduleExportsSomeValue(moduleReferenceExpression) {
-            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
-            if (!moduleSymbol) {
-                return true;
-            }
-            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
-            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
-            var symbolLinks = getSymbolLinks(moduleSymbol);
-            if (symbolLinks.exportsSomeValue === undefined) {
-                symbolLinks.exportsSomeValue = hasExportAssignment
-                    ? !!(moduleSymbol.flags & 107455)
-                    : ts.forEachValue(getExportsOfModule(moduleSymbol), isValue);
-            }
-            return symbolLinks.exportsSomeValue;
-            function isValue(s) {
-                s = resolveSymbol(s);
-                return s && !!(s.flags & 107455);
-            }
-        }
-        function getReferencedExportContainer(node) {
-            var symbol = getReferencedValueSymbol(node);
-            if (symbol) {
-                if (symbol.flags & 1048576) {
-                    var exportSymbol = getMergedSymbol(symbol.exportSymbol);
-                    if (exportSymbol.flags & 944) {
-                        return undefined;
-                    }
-                    symbol = exportSymbol;
-                }
-                var parentSymbol = getParentOfSymbol(symbol);
-                if (parentSymbol) {
-                    if (parentSymbol.flags & 512 && parentSymbol.valueDeclaration.kind === 256) {
-                        return parentSymbol.valueDeclaration;
-                    }
-                    for (var n = node.parent; n; n = n.parent) {
-                        if ((n.kind === 225 || n.kind === 224) && getSymbolOfNode(n) === parentSymbol) {
-                            return n;
-                        }
-                    }
-                }
-            }
-        }
-        function getReferencedImportDeclaration(node) {
-            var symbol = getReferencedValueSymbol(node);
-            return symbol && symbol.flags & 8388608 ? getDeclarationOfAliasSymbol(symbol) : undefined;
-        }
-        function isSymbolOfDeclarationWithCollidingName(symbol) {
-            if (symbol.flags & 418) {
-                var links = getSymbolLinks(symbol);
-                if (links.isDeclarationWithCollidingName === undefined) {
-                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (ts.isStatementWithLocals(container)) {
-                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
-                        if (!!resolveName(container.parent, symbol.name, 107455, undefined, undefined)) {
-                            links.isDeclarationWithCollidingName = true;
-                        }
-                        else if (nodeLinks_1.flags & 131072) {
-                            var isDeclaredInLoop = nodeLinks_1.flags & 262144;
-                            var inLoopInitializer = ts.isIterationStatement(container, false);
-                            var inLoopBodyBlock = container.kind === 199 && ts.isIterationStatement(container.parent, false);
-                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
-                        }
-                        else {
-                            links.isDeclarationWithCollidingName = false;
-                        }
-                    }
-                }
-                return links.isDeclarationWithCollidingName;
-            }
-            return false;
-        }
-        function getReferencedDeclarationWithCollidingName(node) {
-            var symbol = getReferencedValueSymbol(node);
-            return symbol && isSymbolOfDeclarationWithCollidingName(symbol) ? symbol.valueDeclaration : undefined;
-        }
-        function isDeclarationWithCollidingName(node) {
-            return isSymbolOfDeclarationWithCollidingName(getSymbolOfNode(node));
-        }
-        function isValueAliasDeclaration(node) {
-            switch (node.kind) {
-                case 229:
-                case 231:
-                case 232:
-                case 234:
-                case 238:
-                    return isAliasResolvedToValue(getSymbolOfNode(node));
-                case 236:
-                    var exportClause = node.exportClause;
-                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
-                case 235:
-                    return node.expression && node.expression.kind === 69 ? isAliasResolvedToValue(getSymbolOfNode(node)) : true;
-            }
-            return false;
-        }
-        function isTopLevelValueImportEqualsWithEntityName(node) {
-            if (node.parent.kind !== 256 || !ts.isInternalModuleImportEqualsDeclaration(node)) {
-                return false;
-            }
-            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
-            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
-        }
-        function isAliasResolvedToValue(symbol) {
-            var target = resolveAlias(symbol);
-            if (target === unknownSymbol) {
-                return true;
-            }
-            return target.flags & 107455 &&
-                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
-        }
-        function isConstEnumOrConstEnumOnlyModule(s) {
-            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
-        }
-        function isReferencedAliasDeclaration(node, checkChildren) {
-            if (ts.isAliasSymbolDeclaration(node)) {
-                var symbol = getSymbolOfNode(node);
-                if (getSymbolLinks(symbol).referenced) {
-                    return true;
-                }
-            }
-            if (checkChildren) {
-                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
-            }
-            return false;
-        }
-        function isImplementationOfOverload(node) {
-            if (ts.nodeIsPresent(node.body)) {
-                var symbol = getSymbolOfNode(node);
-                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
-                return signaturesOfSymbol.length > 1 ||
-                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
-            }
-            return false;
-        }
-        function getNodeCheckFlags(node) {
-            return getNodeLinks(node).flags;
-        }
-        function getEnumMemberValue(node) {
-            computeEnumMemberValues(node.parent);
-            return getNodeLinks(node).enumMemberValue;
-        }
-        function getConstantValue(node) {
-            if (node.kind === 255) {
-                return getEnumMemberValue(node);
-            }
-            var symbol = getNodeLinks(node).resolvedSymbol;
-            if (symbol && (symbol.flags & 8)) {
-                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
-                    return getEnumMemberValue(symbol.valueDeclaration);
-                }
-            }
-            return undefined;
-        }
-        function isFunctionType(type) {
-            return type.flags & 80896 && getSignaturesOfType(type, 0).length > 0;
-        }
-        function getTypeReferenceSerializationKind(typeName) {
-            var valueSymbol = resolveEntityName(typeName, 107455, true);
-            var constructorType = valueSymbol ? getTypeOfSymbol(valueSymbol) : undefined;
-            if (constructorType && isConstructorType(constructorType)) {
-                return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
-            }
-            var typeSymbol = resolveEntityName(typeName, 793056, true);
-            if (!typeSymbol) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            var type = getDeclaredTypeOfSymbol(typeSymbol);
-            if (type === unknownType) {
-                return ts.TypeReferenceSerializationKind.Unknown;
-            }
-            else if (type.flags & 1) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            else if (isTypeOfKind(type, 16)) {
-                return ts.TypeReferenceSerializationKind.VoidType;
-            }
-            else if (isTypeOfKind(type, 8)) {
-                return ts.TypeReferenceSerializationKind.BooleanType;
-            }
-            else if (isTypeOfKind(type, 132)) {
-                return ts.TypeReferenceSerializationKind.NumberLikeType;
-            }
-            else if (isTypeOfKind(type, 258)) {
-                return ts.TypeReferenceSerializationKind.StringLikeType;
-            }
-            else if (isTypeOfKind(type, 8192)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
-            }
-            else if (isTypeOfKind(type, 16777216)) {
-                return ts.TypeReferenceSerializationKind.ESSymbolType;
-            }
-            else if (isFunctionType(type)) {
-                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
-            }
-            else if (isArrayType(type)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
-            }
-            else {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-        }
-        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
-            var symbol = getSymbolOfNode(declaration);
-            var type = symbol && !(symbol.flags & (2048 | 131072))
-                ? getTypeOfSymbol(symbol)
-                : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
-            var signature = getSignatureFromDeclaration(signatureDeclaration);
-            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
-        }
-        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
-            var type = getWidenedType(getTypeOfExpression(expr));
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeBaseConstructorTypeOfClass(node, enclosingDeclaration, flags, writer) {
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(node));
-            resolveBaseTypesOfClass(classType);
-            var baseType = classType.resolvedBaseTypes.length ? classType.resolvedBaseTypes[0] : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(baseType, writer, enclosingDeclaration, flags);
-        }
-        function hasGlobalName(name) {
-            return ts.hasProperty(globals, name);
-        }
-        function getReferencedValueSymbol(reference) {
-            return getNodeLinks(reference).resolvedSymbol ||
-                resolveName(reference, reference.text, 107455 | 1048576 | 8388608, undefined, undefined);
-        }
-        function getReferencedValueDeclaration(reference) {
-            ts.Debug.assert(!ts.nodeIsSynthesized(reference));
-            var symbol = getReferencedValueSymbol(reference);
-            return symbol && getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
-        }
-        function createResolver() {
-            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
-            var fileToDirective;
-            if (resolvedTypeReferenceDirectives) {
-                fileToDirective = ts.createFileMap();
-                for (var key in resolvedTypeReferenceDirectives) {
-                    if (!ts.hasProperty(resolvedTypeReferenceDirectives, key)) {
-                        continue;
-                    }
-                    var resolvedDirective = resolvedTypeReferenceDirectives[key];
-                    if (!resolvedDirective) {
-                        continue;
-                    }
-                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
-                    fileToDirective.set(file.path, key);
-                }
-            }
-            return {
-                getReferencedExportContainer: getReferencedExportContainer,
-                getReferencedImportDeclaration: getReferencedImportDeclaration,
-                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
-                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
-                isValueAliasDeclaration: isValueAliasDeclaration,
-                hasGlobalName: hasGlobalName,
-                isReferencedAliasDeclaration: isReferencedAliasDeclaration,
-                getNodeCheckFlags: getNodeCheckFlags,
-                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
-                isDeclarationVisible: isDeclarationVisible,
-                isImplementationOfOverload: isImplementationOfOverload,
-                writeTypeOfDeclaration: writeTypeOfDeclaration,
-                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
-                writeTypeOfExpression: writeTypeOfExpression,
-                writeBaseConstructorTypeOfClass: writeBaseConstructorTypeOfClass,
-                isSymbolAccessible: isSymbolAccessible,
-                isEntityNameVisible: isEntityNameVisible,
-                getConstantValue: getConstantValue,
-                collectLinkedAliases: collectLinkedAliases,
-                getReferencedValueDeclaration: getReferencedValueDeclaration,
-                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
-                isOptionalParameter: isOptionalParameter,
-                moduleExportsSomeValue: moduleExportsSomeValue,
-                isArgumentsLocalBinding: isArgumentsLocalBinding,
-                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
-                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
-                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol
-            };
-            function getTypeReferenceDirectivesForEntityName(node) {
-                if (!fileToDirective) {
-                    return undefined;
-                }
-                var meaning = (node.kind === 172) || (node.kind === 69 && isInTypeQuery(node))
-                    ? 107455 | 1048576
-                    : 793056 | 1536;
-                var symbol = resolveEntityName(node, meaning, true);
-                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
-            }
-            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
-                if (!fileToDirective) {
-                    return undefined;
-                }
-                if (!isSymbolFromTypeDeclarationFile(symbol)) {
-                    return undefined;
-                }
-                var typeReferenceDirectives;
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    if (decl.symbol && decl.symbol.flags & meaning) {
-                        var file = ts.getSourceFileOfNode(decl);
-                        var typeReferenceDirective = fileToDirective.get(file.path);
-                        if (typeReferenceDirective) {
-                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
-                        }
-                    }
-                }
-                return typeReferenceDirectives;
-            }
-            function isSymbolFromTypeDeclarationFile(symbol) {
-                if (!symbol.declarations) {
-                    return false;
-                }
-                var current = symbol;
-                while (true) {
-                    var parent_12 = getParentOfSymbol(current);
-                    if (parent_12) {
-                        current = parent_12;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                if (current.valueDeclaration && current.valueDeclaration.kind === 256 && current.flags & 512) {
-                    return false;
-                }
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var file = ts.getSourceFileOfNode(decl);
-                    if (fileToDirective.contains(file.path)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-        }
-        function getExternalModuleFileFromDeclaration(declaration) {
-            var specifier = ts.getExternalModuleName(declaration);
-            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, undefined);
-            if (!moduleSymbol) {
-                return undefined;
-            }
-            return ts.getDeclarationOfKind(moduleSymbol, 256);
-        }
-        function initializeTypeChecker() {
-            ts.forEach(host.getSourceFiles(), function (file) {
-                ts.bindSourceFile(file, compilerOptions);
-            });
-            var augmentations;
-            ts.forEach(host.getSourceFiles(), function (file) {
-                if (!ts.isExternalOrCommonJsModule(file)) {
-                    mergeSymbolTable(globals, file.locals);
-                }
-                if (file.moduleAugmentations.length) {
-                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
-                }
-                if (file.symbol && file.symbol.globalExports) {
-                    mergeSymbolTable(globals, file.symbol.globalExports);
-                }
-            });
-            if (augmentations) {
-                for (var _i = 0, augmentations_1 = augmentations; _i < augmentations_1.length; _i++) {
-                    var list = augmentations_1[_i];
-                    for (var _a = 0, list_2 = list; _a < list_2.length; _a++) {
-                        var augmentation = list_2[_a];
-                        mergeModuleAugmentation(augmentation);
-                    }
-                }
-            }
-            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
-            getSymbolLinks(undefinedSymbol).type = undefinedType;
-            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
-            getSymbolLinks(unknownSymbol).type = unknownType;
-            globalArrayType = getGlobalType("Array", 1);
-            globalObjectType = getGlobalType("Object");
-            globalFunctionType = getGlobalType("Function");
-            globalStringType = getGlobalType("String");
-            globalNumberType = getGlobalType("Number");
-            globalBooleanType = getGlobalType("Boolean");
-            globalRegExpType = getGlobalType("RegExp");
-            jsxElementType = getExportedTypeFromNamespace("JSX", JsxNames.Element);
-            getGlobalClassDecoratorType = ts.memoize(function () { return getGlobalType("ClassDecorator"); });
-            getGlobalPropertyDecoratorType = ts.memoize(function () { return getGlobalType("PropertyDecorator"); });
-            getGlobalMethodDecoratorType = ts.memoize(function () { return getGlobalType("MethodDecorator"); });
-            getGlobalParameterDecoratorType = ts.memoize(function () { return getGlobalType("ParameterDecorator"); });
-            getGlobalTypedPropertyDescriptorType = ts.memoize(function () { return getGlobalType("TypedPropertyDescriptor", 1); });
-            getGlobalESSymbolConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Symbol"); });
-            getGlobalPromiseType = ts.memoize(function () { return getGlobalType("Promise", 1); });
-            tryGetGlobalPromiseType = ts.memoize(function () { return getGlobalSymbol("Promise", 793056, undefined) && getGlobalPromiseType(); });
-            getGlobalPromiseLikeType = ts.memoize(function () { return getGlobalType("PromiseLike", 1); });
-            getInstantiatedGlobalPromiseLikeType = ts.memoize(createInstantiatedPromiseLikeType);
-            getGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Promise"); });
-            getGlobalPromiseConstructorLikeType = ts.memoize(function () { return getGlobalType("PromiseConstructorLike"); });
-            getGlobalThenableType = ts.memoize(createThenableType);
-            getGlobalTemplateStringsArrayType = ts.memoize(function () { return getGlobalType("TemplateStringsArray"); });
-            if (languageVersion >= 2) {
-                getGlobalESSymbolType = ts.memoize(function () { return getGlobalType("Symbol"); });
-                getGlobalIterableType = ts.memoize(function () { return getGlobalType("Iterable", 1); });
-                getGlobalIteratorType = ts.memoize(function () { return getGlobalType("Iterator", 1); });
-                getGlobalIterableIteratorType = ts.memoize(function () { return getGlobalType("IterableIterator", 1); });
-            }
-            else {
-                getGlobalESSymbolType = ts.memoize(function () { return emptyObjectType; });
-                getGlobalIterableType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIteratorType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIterableIteratorType = ts.memoize(function () { return emptyGenericType; });
-            }
-            anyArrayType = createArrayType(anyType);
-            var symbol = getGlobalSymbol("ReadonlyArray", 793056, undefined);
-            globalReadonlyArrayType = symbol && getTypeOfGlobalSymbol(symbol, 1);
-            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
-        }
-        function createInstantiatedPromiseLikeType() {
-            var promiseLikeType = getGlobalPromiseLikeType();
-            if (promiseLikeType !== emptyGenericType) {
-                return createTypeReference(promiseLikeType, [anyType]);
-            }
-            return emptyObjectType;
-        }
-        function createThenableType() {
-            var thenPropertySymbol = createSymbol(67108864 | 4, "then");
-            getSymbolLinks(thenPropertySymbol).type = globalFunctionType;
-            var thenableType = createObjectType(65536);
-            thenableType.properties = [thenPropertySymbol];
-            thenableType.members = createSymbolTable(thenableType.properties);
-            thenableType.callSignatures = [];
-            thenableType.constructSignatures = [];
-            return thenableType;
-        }
-        function checkGrammarDecorators(node) {
-            if (!node.decorators) {
-                return false;
-            }
-            if (!ts.nodeCanBeDecorated(node)) {
-                if (node.kind === 147 && !ts.nodeIsPresent(node.body)) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
-                }
-                else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
-                }
-            }
-            else if (node.kind === 149 || node.kind === 150) {
-                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
-                }
-            }
-            return false;
-        }
-        function checkGrammarModifiers(node) {
-            switch (node.kind) {
-                case 149:
-                case 150:
-                case 148:
-                case 145:
-                case 144:
-                case 147:
-                case 146:
-                case 153:
-                case 225:
-                case 230:
-                case 229:
-                case 236:
-                case 235:
-                case 142:
-                    break;
-                case 220:
-                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 118) &&
-                        node.parent.kind !== 226 && node.parent.kind !== 256) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                case 221:
-                case 222:
-                case 200:
-                case 223:
-                    if (node.modifiers && node.parent.kind !== 226 && node.parent.kind !== 256) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                case 224:
-                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 74) &&
-                        node.parent.kind !== 226 && node.parent.kind !== 256) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                default:
-                    return false;
-            }
-            if (!node.modifiers) {
-                return;
-            }
-            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
-            var flags = 0;
-            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
-                var modifier = _a[_i];
-                if (modifier.kind !== 128) {
-                    if (node.kind === 144 || node.kind === 146) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
-                    }
-                    if (node.kind === 153) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
-                    }
-                }
-                switch (modifier.kind) {
-                    case 74:
-                        if (node.kind !== 224 && node.parent.kind === 221) {
-                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(74));
-                        }
-                        break;
-                    case 112:
-                    case 111:
-                    case 110:
-                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
-                        if (modifier.kind === 111) {
-                            lastProtected = modifier;
-                        }
-                        else if (modifier.kind === 110) {
-                            lastPrivate = modifier;
-                        }
-                        if (flags & 28) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
-                        }
-                        else if (flags & 32) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
-                        }
-                        else if (flags & 64) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
-                        }
-                        else if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
-                        }
-                        else if (node.parent.kind === 226 || node.parent.kind === 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
-                        }
-                        else if (flags & 128) {
-                            if (modifier.kind === 110) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
-                            }
-                            else {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
-                            }
-                        }
-                        flags |= ts.modifierToFlag(modifier.kind);
-                        break;
-                    case 113:
-                        if (flags & 32) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
-                        }
-                        else if (flags & 64) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
-                        }
-                        else if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
-                        }
-                        else if (node.parent.kind === 226 || node.parent.kind === 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
-                        }
-                        else if (node.kind === 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
-                        }
-                        else if (flags & 128) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                        }
-                        flags |= 32;
-                        lastStatic = modifier;
-                        break;
-                    case 128:
-                        if (flags & 64) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
-                        }
-                        else if (node.kind !== 145 && node.kind !== 144 && node.kind !== 153 && node.kind !== 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
-                        }
-                        flags |= 64;
-                        lastReadonly = modifier;
-                        break;
-                    case 82:
-                        if (flags & 1) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
-                        }
-                        else if (flags & 2) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
-                        }
-                        else if (flags & 128) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
-                        }
-                        else if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
-                        }
-                        else if (node.parent.kind === 221) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
-                        }
-                        else if (node.kind === 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
-                        }
-                        flags |= 1;
-                        break;
-                    case 122:
-                        if (flags & 2) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
-                        }
-                        else if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.parent.kind === 221) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
-                        }
-                        else if (node.kind === 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
-                        }
-                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 226) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
-                        }
-                        flags |= 2;
-                        lastDeclare = modifier;
-                        break;
-                    case 115:
-                        if (flags & 128) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
-                        }
-                        if (node.kind !== 221) {
-                            if (node.kind !== 147 &&
-                                node.kind !== 145 &&
-                                node.kind !== 149 &&
-                                node.kind !== 150) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
-                            }
-                            if (!(node.parent.kind === 221 && node.parent.flags & 128)) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
-                            }
-                            if (flags & 32) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                            }
-                            if (flags & 8) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
-                            }
-                        }
-                        flags |= 128;
-                        break;
-                    case 118:
-                        if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
-                        }
-                        else if (flags & 2 || ts.isInAmbientContext(node.parent)) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.kind === 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
-                        }
-                        flags |= 256;
-                        lastAsync = modifier;
-                        break;
-                }
-            }
-            if (node.kind === 148) {
-                if (flags & 32) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
-                }
-                if (flags & 128) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
-                }
-                else if (flags & 256) {
-                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
-                }
-                else if (flags & 64) {
-                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
-                }
-                return;
-            }
-            else if ((node.kind === 230 || node.kind === 229) && flags & 2) {
-                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
-            }
-            else if (node.kind === 142 && (flags & 92) && ts.isBindingPattern(node.name)) {
-                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_a_binding_pattern);
-            }
-            if (flags & 256) {
-                return checkGrammarAsyncModifier(node, lastAsync);
-            }
-        }
-        function checkGrammarAsyncModifier(node, asyncModifier) {
-            if (languageVersion < 2) {
-                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
-            }
-            switch (node.kind) {
-                case 147:
-                case 220:
-                case 179:
-                case 180:
-                    if (!node.asteriskToken) {
-                        return false;
-                    }
-                    break;
-            }
-            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
-        }
-        function checkGrammarForDisallowedTrailingComma(list) {
-            if (list && list.hasTrailingComma) {
-                var start = list.end - ",".length;
-                var end = list.end;
-                var sourceFile = ts.getSourceFileOfNode(list[0]);
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
-            }
-        }
-        function checkGrammarTypeParameterList(node, typeParameters, file) {
-            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
-                return true;
-            }
-            if (typeParameters && typeParameters.length === 0) {
-                var start = typeParameters.pos - "<".length;
-                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
-                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
-            }
-        }
-        function checkGrammarParameterList(parameters) {
-            if (checkGrammarForDisallowedTrailingComma(parameters)) {
-                return true;
-            }
-            var seenOptionalParameter = false;
-            var parameterCount = parameters.length;
-            for (var i = 0; i < parameterCount; i++) {
-                var parameter = parameters[i];
-                if (parameter.dotDotDotToken) {
-                    if (i !== (parameterCount - 1)) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
-                    }
-                    if (ts.isBindingPattern(parameter.name)) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
-                    }
-                    if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
-                    }
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
-                    }
-                }
-                else if (parameter.questionToken) {
-                    seenOptionalParameter = true;
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
-                    }
-                }
-                else if (seenOptionalParameter && !parameter.initializer) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
-                }
-            }
-        }
-        function checkGrammarFunctionLikeDeclaration(node) {
-            var file = ts.getSourceFileOfNode(node);
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node, node.typeParameters, file) ||
-                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
-        }
-        function checkGrammarArrowFunction(node, file) {
-            if (node.kind === 180) {
-                var arrowFunction = node;
-                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
-                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
-                if (startLine !== endLine) {
-                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
-                }
-            }
-            return false;
-        }
-        function checkGrammarIndexSignatureParameters(node) {
-            var parameter = node.parameters[0];
-            if (node.parameters.length !== 1) {
-                if (parameter) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
-                }
-                else {
-                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
-                }
-            }
-            if (parameter.dotDotDotToken) {
-                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
-            }
-            if (parameter.flags & 1023) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
-            }
-            if (parameter.questionToken) {
-                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
-            }
-            if (parameter.initializer) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
-            }
-            if (!parameter.type) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
-            }
-            if (parameter.type.kind !== 132 && parameter.type.kind !== 130) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
-            }
-            if (!node.type) {
-                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
-            }
-        }
-        function checkGrammarIndexSignature(node) {
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
-        }
-        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
-            if (typeArguments && typeArguments.length === 0) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                var start = typeArguments.pos - "<".length;
-                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
-            }
-        }
-        function checkGrammarTypeArguments(node, typeArguments) {
-            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
-                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
-        }
-        function checkGrammarForOmittedArgument(node, args) {
-            if (args) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                for (var _i = 0, args_1 = args; _i < args_1.length; _i++) {
-                    var arg = args_1[_i];
-                    if (arg.kind === 193) {
-                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
-                    }
-                }
-            }
-        }
-        function checkGrammarArguments(node, args) {
-            return checkGrammarForDisallowedTrailingComma(args) ||
-                checkGrammarForOmittedArgument(node, args);
-        }
-        function checkGrammarHeritageClause(node) {
-            var types = node.types;
-            if (checkGrammarForDisallowedTrailingComma(types)) {
-                return true;
-            }
-            if (types && types.length === 0) {
-                var listType = ts.tokenToString(node.token);
-                var sourceFile = ts.getSourceFileOfNode(node);
-                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
-            }
-        }
-        function checkGrammarClassDeclarationHeritageClauses(node) {
-            var seenExtendsClause = false;
-            var seenImplementsClause = false;
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
-                        }
-                        if (heritageClause.types.length > 1) {
-                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
-                        }
-                        seenExtendsClause = true;
-                    }
-                    else {
-                        ts.Debug.assert(heritageClause.token === 106);
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
-                        }
-                        seenImplementsClause = true;
-                    }
-                    checkGrammarHeritageClause(heritageClause);
-                }
-            }
-        }
-        function checkGrammarInterfaceDeclaration(node) {
-            var seenExtendsClause = false;
-            if (node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        seenExtendsClause = true;
-                    }
-                    else {
-                        ts.Debug.assert(heritageClause.token === 106);
-                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
-                    }
-                    checkGrammarHeritageClause(heritageClause);
-                }
-            }
-            return false;
-        }
-        function checkGrammarComputedPropertyName(node) {
-            if (node.kind !== 140) {
-                return false;
-            }
-            var computedPropertyName = node;
-            if (computedPropertyName.expression.kind === 187 && computedPropertyName.expression.operatorToken.kind === 24) {
-                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
-            }
-        }
-        function checkGrammarForGenerator(node) {
-            if (node.asteriskToken) {
-                ts.Debug.assert(node.kind === 220 ||
-                    node.kind === 179 ||
-                    node.kind === 147);
-                if (ts.isInAmbientContext(node)) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
-                }
-                if (!node.body) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
-                }
-                if (languageVersion < 2) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
-                }
-            }
-        }
-        function checkGrammarForInvalidQuestionMark(node, questionToken, message) {
-            if (questionToken) {
-                return grammarErrorOnNode(questionToken, message);
-            }
-        }
-        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
-            var seen = {};
-            var Property = 1;
-            var GetAccessor = 2;
-            var SetAccessor = 4;
-            var GetOrSetAccessor = GetAccessor | SetAccessor;
-            var _loop_1 = function(prop) {
-                var name_20 = prop.name;
-                if (prop.kind === 193 ||
-                    name_20.kind === 140) {
-                    checkGrammarComputedPropertyName(name_20);
-                }
-                if (prop.kind === 254 && !inDestructuring && prop.objectAssignmentInitializer) {
-                    return { value: grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment) };
-                }
-                ts.forEach(prop.modifiers, function (mod) {
-                    if (mod.kind !== 118 || prop.kind !== 147) {
-                        grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
-                    }
-                });
-                var currentKind = void 0;
-                if (prop.kind === 253 || prop.kind === 254) {
-                    checkGrammarForInvalidQuestionMark(prop, prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
-                    if (name_20.kind === 8) {
-                        checkGrammarNumericLiteral(name_20);
-                    }
-                    currentKind = Property;
-                }
-                else if (prop.kind === 147) {
-                    currentKind = Property;
-                }
-                else if (prop.kind === 149) {
-                    currentKind = GetAccessor;
-                }
-                else if (prop.kind === 150) {
-                    currentKind = SetAccessor;
-                }
-                else {
-                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
-                }
-                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_20);
-                if (effectiveName === undefined) {
-                    return "continue";
-                }
-                if (!ts.hasProperty(seen, effectiveName)) {
-                    seen[effectiveName] = currentKind;
-                }
-                else {
-                    var existingKind = seen[effectiveName];
-                    if (currentKind === Property && existingKind === Property) {
-                        grammarErrorOnNode(name_20, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_20));
-                    }
-                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
-                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[effectiveName] = currentKind | existingKind;
-                        }
-                        else {
-                            return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
-                        }
-                    }
-                    else {
-                        return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name) };
-                    }
-                }
-            };
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var prop = _a[_i];
-                var state_2 = _loop_1(prop);
-                if (typeof state_2 === "object") return state_2.value;
-            }
-        }
-        function checkGrammarJsxElement(node) {
-            var seen = {};
-            for (var _i = 0, _a = node.attributes; _i < _a.length; _i++) {
-                var attr = _a[_i];
-                if (attr.kind === 247) {
-                    continue;
-                }
-                var jsxAttr = attr;
-                var name_21 = jsxAttr.name;
-                if (!ts.hasProperty(seen, name_21.text)) {
-                    seen[name_21.text] = true;
-                }
-                else {
-                    return grammarErrorOnNode(name_21, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
-                }
-                var initializer = jsxAttr.initializer;
-                if (initializer && initializer.kind === 248 && !initializer.expression) {
-                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
-                }
-            }
-        }
-        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
-            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
-                return true;
-            }
-            if (forInOrOfStatement.initializer.kind === 219) {
-                var variableList = forInOrOfStatement.initializer;
-                if (!checkGrammarVariableDeclarationList(variableList)) {
-                    var declarations = variableList.declarations;
-                    if (!declarations.length) {
-                        return false;
-                    }
-                    if (declarations.length > 1) {
-                        var diagnostic = forInOrOfStatement.kind === 207
-                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
-                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
-                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
-                    }
-                    var firstDeclaration = declarations[0];
-                    if (firstDeclaration.initializer) {
-                        var diagnostic = forInOrOfStatement.kind === 207
-                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
-                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
-                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
-                    }
-                    if (firstDeclaration.type) {
-                        var diagnostic = forInOrOfStatement.kind === 207
-                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
-                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
-                        return grammarErrorOnNode(firstDeclaration, diagnostic);
-                    }
-                }
-            }
-            return false;
-        }
-        function checkGrammarAccessor(accessor) {
-            var kind = accessor.kind;
-            if (languageVersion < 1) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
-            }
-            else if (ts.isInAmbientContext(accessor)) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
-            }
-            else if (accessor.body === undefined && !(accessor.flags & 128)) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
-            }
-            else if (accessor.typeParameters) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
-            }
-            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
-                return grammarErrorOnNode(accessor.name, kind === 149 ?
-                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
-                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
-            }
-            else if (kind === 150) {
-                if (accessor.type) {
-                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
-                }
-                else {
-                    var parameter = accessor.parameters[0];
-                    if (parameter.dotDotDotToken) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
-                    }
-                    else if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
-                    }
-                    else if (parameter.initializer) {
-                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
-                    }
-                }
-            }
-        }
-        function doesAccessorHaveCorrectParameterCount(accessor) {
-            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 149 ? 0 : 1);
-        }
-        function getAccessorThisParameter(accessor) {
-            if (accessor.parameters.length === (accessor.kind === 149 ? 1 : 2) &&
-                accessor.parameters[0].name.kind === 69 &&
-                accessor.parameters[0].name.originalKeywordKind === 97) {
-                return accessor.parameters[0];
-            }
-        }
-        function checkGrammarForNonSymbolComputedProperty(node, message) {
-            if (ts.isDynamicName(node)) {
-                return grammarErrorOnNode(node, message);
-            }
-        }
-        function checkGrammarMethod(node) {
-            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
-                checkGrammarFunctionLikeDeclaration(node) ||
-                checkGrammarForGenerator(node)) {
-                return true;
-            }
-            if (node.parent.kind === 171) {
-                if (checkGrammarForInvalidQuestionMark(node, node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
-                    return true;
-                }
-                else if (node.body === undefined) {
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
-                }
-            }
-            if (ts.isClassLike(node.parent)) {
-                if (ts.isInAmbientContext(node)) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
-                }
-                else if (!node.body) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
-                }
-            }
-            else if (node.parent.kind === 222) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
-            }
-            else if (node.parent.kind === 159) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
-            }
-        }
-        function checkGrammarBreakOrContinueStatement(node) {
-            var current = node;
-            while (current) {
-                if (ts.isFunctionLike(current)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
-                }
-                switch (current.kind) {
-                    case 214:
-                        if (node.label && current.label.text === node.label.text) {
-                            var isMisplacedContinueLabel = node.kind === 209
-                                && !ts.isIterationStatement(current.statement, true);
-                            if (isMisplacedContinueLabel) {
-                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
-                            }
-                            return false;
-                        }
-                        break;
-                    case 213:
-                        if (node.kind === 210 && !node.label) {
-                            return false;
-                        }
-                        break;
-                    default:
-                        if (ts.isIterationStatement(current, false) && !node.label) {
-                            return false;
-                        }
-                        break;
-                }
-                current = current.parent;
-            }
-            if (node.label) {
-                var message = node.kind === 210
-                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-            else {
-                var message = node.kind === 210
-                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-        }
-        function checkGrammarBindingElement(node) {
-            if (node.dotDotDotToken) {
-                var elements = node.parent.elements;
-                if (node !== ts.lastOrUndefined(elements)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
-                }
-                if (node.name.kind === 168 || node.name.kind === 167) {
-                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
-                }
-                if (node.initializer) {
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
-                }
-            }
-        }
-        function checkGrammarVariableDeclaration(node) {
-            if (node.parent.parent.kind !== 207 && node.parent.parent.kind !== 208) {
-                if (ts.isInAmbientContext(node)) {
-                    if (node.initializer) {
-                        var equalsTokenLength = "=".length;
-                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-                    }
-                }
-                else if (!node.initializer) {
-                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
-                    }
-                    if (ts.isConst(node)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
-                    }
-                }
-            }
-            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
-            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
-        }
-        function checkGrammarNameInLetOrConstDeclarations(name) {
-            if (name.kind === 69) {
-                if (name.originalKeywordKind === 108) {
-                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
-                }
-            }
-            else {
-                var elements = name.elements;
-                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
-                    var element = elements_2[_i];
-                    if (element.kind !== 193) {
-                        checkGrammarNameInLetOrConstDeclarations(element.name);
-                    }
-                }
-            }
-        }
-        function checkGrammarVariableDeclarationList(declarationList) {
-            var declarations = declarationList.declarations;
-            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
-                return true;
-            }
-            if (!declarationList.declarations.length) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
-            }
-        }
-        function allowLetAndConstDeclarations(parent) {
-            switch (parent.kind) {
-                case 203:
-                case 204:
-                case 205:
-                case 212:
-                case 206:
-                case 207:
-                case 208:
-                    return false;
-                case 214:
-                    return allowLetAndConstDeclarations(parent.parent);
-            }
-            return true;
-        }
-        function checkGrammarForDisallowedLetOrConstStatement(node) {
-            if (!allowLetAndConstDeclarations(node.parent)) {
-                if (ts.isLet(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
-                }
-                else if (ts.isConst(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
-                }
-            }
-        }
-        function hasParseDiagnostics(sourceFile) {
-            return sourceFile.parseDiagnostics.length > 0;
-        }
-        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function checkGrammarConstructorTypeParameters(node) {
-            if (node.typeParameters) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
-            }
-        }
-        function checkGrammarConstructorTypeAnnotation(node) {
-            if (node.type) {
-                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
-            }
-        }
-        function checkGrammarProperty(node) {
-            if (ts.isClassLike(node.parent)) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-            }
-            else if (node.parent.kind === 222) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
-                }
-            }
-            else if (node.parent.kind === 159) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
-                }
-            }
-            if (ts.isInAmbientContext(node) && node.initializer) {
-                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-            }
-        }
-        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
-            if (node.kind === 222 ||
-                node.kind === 223 ||
-                node.kind === 230 ||
-                node.kind === 229 ||
-                node.kind === 236 ||
-                node.kind === 235 ||
-                (node.flags & 2) ||
-                (node.flags & (1 | 512))) {
-                return false;
-            }
-            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
-        }
-        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
-            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
-                var decl = _a[_i];
-                if (ts.isDeclaration(decl) || decl.kind === 200) {
-                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
-                        return true;
-                    }
-                }
-            }
-        }
-        function checkGrammarSourceFile(node) {
-            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
-        }
-        function checkGrammarStatementInAmbientContext(node) {
-            if (ts.isInAmbientContext(node)) {
-                if (isAccessor(node.parent.kind)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
-                }
-                var links = getNodeLinks(node);
-                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
-                }
-                if (node.parent.kind === 199 || node.parent.kind === 226 || node.parent.kind === 256) {
-                    var links_1 = getNodeLinks(node.parent);
-                    if (!links_1.hasReportedStatementInAmbientContext) {
-                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
-                    }
-                }
-                else {
-                }
-            }
-        }
-        function checkGrammarNumericLiteral(node) {
-            if (node.isOctalLiteral && languageVersion >= 1) {
-                return grammarErrorOnNode(node, ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
-            }
-        }
-        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span), 0, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        var _a;
-    }
-    ts.createTypeChecker = createTypeChecker;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var nullSourceMapWriter;
-    var defaultLastEncodedSourceMapSpan = {
-        emittedLine: 1,
-        emittedColumn: 1,
-        sourceLine: 1,
-        sourceColumn: 1,
-        sourceIndex: 0
-    };
-    function getNullSourceMapWriter() {
-        if (nullSourceMapWriter === undefined) {
-            nullSourceMapWriter = {
-                getSourceMapData: function () { return undefined; },
-                setSourceFile: function (sourceFile) { },
-                emitStart: function (range) { },
-                emitEnd: function (range, stopOverridingSpan) { },
-                emitPos: function (pos) { },
-                changeEmitSourcePos: function () { },
-                getText: function () { return undefined; },
-                getSourceMappingURL: function () { return undefined; },
-                initialize: function (filePath, sourceMapFilePath, sourceFiles, isBundledEmit) { },
-                reset: function () { }
-            };
-        }
-        return nullSourceMapWriter;
-    }
-    ts.getNullSourceMapWriter = getNullSourceMapWriter;
-    function createSourceMapWriter(host, writer) {
-        var compilerOptions = host.getCompilerOptions();
-        var currentSourceFile;
-        var sourceMapDir;
-        var stopOverridingSpan = false;
-        var modifyLastSourcePos = false;
-        var sourceMapSourceIndex;
-        var lastRecordedSourceMapSpan;
-        var lastEncodedSourceMapSpan;
-        var lastEncodedNameIndex;
-        var sourceMapData;
-        return {
-            getSourceMapData: function () { return sourceMapData; },
-            setSourceFile: setSourceFile,
-            emitPos: emitPos,
-            emitStart: emitStart,
-            emitEnd: emitEnd,
-            changeEmitSourcePos: changeEmitSourcePos,
-            getText: getText,
-            getSourceMappingURL: getSourceMappingURL,
-            initialize: initialize,
-            reset: reset
-        };
-        function initialize(filePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
-            if (sourceMapData) {
-                reset();
-            }
-            currentSourceFile = undefined;
-            sourceMapSourceIndex = -1;
-            lastRecordedSourceMapSpan = undefined;
-            lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
-            lastEncodedNameIndex = 0;
-            sourceMapData = {
-                sourceMapFilePath: sourceMapFilePath,
-                jsSourceMappingURL: !compilerOptions.inlineSourceMap ? ts.getBaseFileName(ts.normalizeSlashes(sourceMapFilePath)) : undefined,
-                sourceMapFile: ts.getBaseFileName(ts.normalizeSlashes(filePath)),
-                sourceMapSourceRoot: compilerOptions.sourceRoot || "",
-                sourceMapSources: [],
-                inputSourceFileNames: [],
-                sourceMapNames: [],
-                sourceMapMappings: "",
-                sourceMapSourcesContent: compilerOptions.inlineSources ? [] : undefined,
-                sourceMapDecodedMappings: []
-            };
-            sourceMapData.sourceMapSourceRoot = ts.normalizeSlashes(sourceMapData.sourceMapSourceRoot);
-            if (sourceMapData.sourceMapSourceRoot.length && sourceMapData.sourceMapSourceRoot.charCodeAt(sourceMapData.sourceMapSourceRoot.length - 1) !== 47) {
-                sourceMapData.sourceMapSourceRoot += ts.directorySeparator;
-            }
-            if (compilerOptions.mapRoot) {
-                sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
-                if (!isBundledEmit) {
-                    ts.Debug.assert(sourceFiles.length === 1);
-                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFiles[0], host, sourceMapDir));
-                }
-                if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
-                    sourceMapDir = ts.combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
-                    sourceMapData.jsSourceMappingURL = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizePath(filePath)), ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), host.getCurrentDirectory(), host.getCanonicalFileName, true);
-                }
-                else {
-                    sourceMapData.jsSourceMappingURL = ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL);
-                }
-            }
-            else {
-                sourceMapDir = ts.getDirectoryPath(ts.normalizePath(filePath));
-            }
-        }
-        function reset() {
-            currentSourceFile = undefined;
-            sourceMapDir = undefined;
-            sourceMapSourceIndex = undefined;
-            lastRecordedSourceMapSpan = undefined;
-            lastEncodedSourceMapSpan = undefined;
-            lastEncodedNameIndex = undefined;
-            sourceMapData = undefined;
-        }
-        function updateLastEncodedAndRecordedSpans() {
-            if (modifyLastSourcePos) {
-                modifyLastSourcePos = false;
-                lastRecordedSourceMapSpan.emittedLine = lastEncodedSourceMapSpan.emittedLine;
-                lastRecordedSourceMapSpan.emittedColumn = lastEncodedSourceMapSpan.emittedColumn;
-                sourceMapData.sourceMapDecodedMappings.pop();
-                lastEncodedSourceMapSpan = sourceMapData.sourceMapDecodedMappings.length ?
-                    sourceMapData.sourceMapDecodedMappings[sourceMapData.sourceMapDecodedMappings.length - 1] :
-                    defaultLastEncodedSourceMapSpan;
-                var sourceMapMappings = sourceMapData.sourceMapMappings;
-                var lenthToSet = sourceMapMappings.length - 1;
-                for (; lenthToSet >= 0; lenthToSet--) {
-                    var currentChar = sourceMapMappings.charAt(lenthToSet);
-                    if (currentChar === ",") {
-                        break;
-                    }
-                    if (currentChar === ";" && lenthToSet !== 0 && sourceMapMappings.charAt(lenthToSet - 1) !== ";") {
-                        break;
-                    }
-                }
-                sourceMapData.sourceMapMappings = sourceMapMappings.substr(0, Math.max(0, lenthToSet));
-            }
-        }
-        function encodeLastRecordedSourceMapSpan() {
-            if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) {
-                return;
-            }
-            var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn;
-            if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) {
-                if (sourceMapData.sourceMapMappings) {
-                    sourceMapData.sourceMapMappings += ",";
-                }
-            }
-            else {
-                for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) {
-                    sourceMapData.sourceMapMappings += ";";
-                }
-                prevEncodedEmittedColumn = 1;
-            }
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn);
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex);
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine);
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn);
-            if (lastRecordedSourceMapSpan.nameIndex >= 0) {
-                ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this");
-                sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex);
-                lastEncodedNameIndex = lastRecordedSourceMapSpan.nameIndex;
-            }
-            lastEncodedSourceMapSpan = lastRecordedSourceMapSpan;
-            sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan);
-        }
-        function emitPos(pos) {
-            if (pos === -1) {
-                return;
-            }
-            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSourceFile, pos);
-            sourceLinePos.line++;
-            sourceLinePos.character++;
-            var emittedLine = writer.getLine();
-            var emittedColumn = writer.getColumn();
-            if (!lastRecordedSourceMapSpan ||
-                lastRecordedSourceMapSpan.emittedLine !== emittedLine ||
-                lastRecordedSourceMapSpan.emittedColumn !== emittedColumn ||
-                (lastRecordedSourceMapSpan.sourceIndex === sourceMapSourceIndex &&
-                    (lastRecordedSourceMapSpan.sourceLine > sourceLinePos.line ||
-                        (lastRecordedSourceMapSpan.sourceLine === sourceLinePos.line && lastRecordedSourceMapSpan.sourceColumn > sourceLinePos.character)))) {
-                encodeLastRecordedSourceMapSpan();
-                lastRecordedSourceMapSpan = {
-                    emittedLine: emittedLine,
-                    emittedColumn: emittedColumn,
-                    sourceLine: sourceLinePos.line,
-                    sourceColumn: sourceLinePos.character,
-                    sourceIndex: sourceMapSourceIndex
-                };
-                stopOverridingSpan = false;
-            }
-            else if (!stopOverridingSpan) {
-                lastRecordedSourceMapSpan.sourceLine = sourceLinePos.line;
-                lastRecordedSourceMapSpan.sourceColumn = sourceLinePos.character;
-                lastRecordedSourceMapSpan.sourceIndex = sourceMapSourceIndex;
-            }
-            updateLastEncodedAndRecordedSpans();
-        }
-        function getStartPos(range) {
-            var rangeHasDecorators = !!range.decorators;
-            return range.pos !== -1 ? ts.skipTrivia(currentSourceFile.text, rangeHasDecorators ? range.decorators.end : range.pos) : -1;
-        }
-        function emitStart(range) {
-            emitPos(getStartPos(range));
-        }
-        function emitEnd(range, stopOverridingEnd) {
-            emitPos(range.end);
-            stopOverridingSpan = stopOverridingEnd;
-        }
-        function changeEmitSourcePos() {
-            ts.Debug.assert(!modifyLastSourcePos);
-            modifyLastSourcePos = true;
-        }
-        function setSourceFile(sourceFile) {
-            currentSourceFile = sourceFile;
-            var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
-            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSourceFile.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, true);
-            sourceMapSourceIndex = ts.indexOf(sourceMapData.sourceMapSources, source);
-            if (sourceMapSourceIndex === -1) {
-                sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
-                sourceMapData.sourceMapSources.push(source);
-                sourceMapData.inputSourceFileNames.push(sourceFile.fileName);
-                if (compilerOptions.inlineSources) {
-                    sourceMapData.sourceMapSourcesContent.push(sourceFile.text);
-                }
-            }
-        }
-        function getText() {
-            encodeLastRecordedSourceMapSpan();
-            return ts.stringify({
-                version: 3,
-                file: sourceMapData.sourceMapFile,
-                sourceRoot: sourceMapData.sourceMapSourceRoot,
-                sources: sourceMapData.sourceMapSources,
-                names: sourceMapData.sourceMapNames,
-                mappings: sourceMapData.sourceMapMappings,
-                sourcesContent: sourceMapData.sourceMapSourcesContent
-            });
-        }
-        function getSourceMappingURL() {
-            if (compilerOptions.inlineSourceMap) {
-                var base64SourceMapText = ts.convertToBase64(getText());
-                return sourceMapData.jsSourceMappingURL = "data:application/json;base64," + base64SourceMapText;
-            }
-            else {
-                return sourceMapData.jsSourceMappingURL;
-            }
-        }
-    }
-    ts.createSourceMapWriter = createSourceMapWriter;
-    var base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-    function base64FormatEncode(inValue) {
-        if (inValue < 64) {
-            return base64Chars.charAt(inValue);
-        }
-        throw TypeError(inValue + ": not a 64 based value");
-    }
-    function base64VLQFormatEncode(inValue) {
-        if (inValue < 0) {
-            inValue = ((-inValue) << 1) + 1;
-        }
-        else {
-            inValue = inValue << 1;
-        }
-        var encodedStr = "";
-        do {
-            var currentDigit = inValue & 31;
-            inValue = inValue >> 5;
-            if (inValue > 0) {
-                currentDigit = currentDigit | 32;
-            }
-            encodedStr = encodedStr + base64FormatEncode(currentDigit);
-        } while (inValue > 0);
-        return encodedStr;
-    }
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
-        var declarationDiagnostics = ts.createDiagnosticCollection();
-        ts.forEachExpectedEmitFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
-        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
-        function getDeclarationDiagnosticsFromFile(_a, sources, isBundledEmit) {
-            var declarationFilePath = _a.declarationFilePath;
-            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sources, isBundledEmit);
-        }
-    }
-    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
-    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit) {
-        var newLine = host.getNewLine();
-        var compilerOptions = host.getCompilerOptions();
-        var write;
-        var writeLine;
-        var increaseIndent;
-        var decreaseIndent;
-        var writeTextOfNode;
-        var writer;
-        createAndSetNewTextWriterWithSymbolWriter();
-        var enclosingDeclaration;
-        var resultHasExternalModuleIndicator;
-        var currentText;
-        var currentLineMap;
-        var currentIdentifiers;
-        var isCurrentFileExternalModule;
-        var reportedDeclarationError = false;
-        var errorNameNode;
-        var emitJsDocComments = compilerOptions.removeComments ? function (declaration) { } : writeJsDocComments;
-        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
-        var noDeclare;
-        var moduleElementDeclarationEmitInfo = [];
-        var asynchronousSubModuleDeclarationEmitInfo;
-        var referencesOutput = "";
-        var usedTypeDirectiveReferences;
-        var emittedReferencedFiles = [];
-        var addedGlobalFileReference = false;
-        var allSourcesModuleElementDeclarationEmitInfo = [];
-        ts.forEach(sourceFiles, function (sourceFile) {
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                return;
-            }
-            if (!compilerOptions.noResolve) {
-                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
-                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
-                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
-                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference)) {
-                            addedGlobalFileReference = true;
-                        }
-                        emittedReferencedFiles.push(referencedFile);
-                    }
-                });
-            }
-            resultHasExternalModuleIndicator = false;
-            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
-                noDeclare = false;
-                emitSourceFile(sourceFile);
-            }
-            else if (ts.isExternalModule(sourceFile)) {
-                noDeclare = true;
-                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
-                writeLine();
-                increaseIndent();
-                emitSourceFile(sourceFile);
-                decreaseIndent();
-                write("}");
-                writeLine();
-            }
-            if (moduleElementDeclarationEmitInfo.length) {
-                var oldWriter = writer;
-                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
-                        ts.Debug.assert(aliasEmitInfo.node.kind === 230);
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            increaseIndent();
-                        }
-                        writeImportDeclaration(aliasEmitInfo.node);
-                        aliasEmitInfo.asynchronousOutput = writer.getText();
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            decreaseIndent();
-                        }
-                    }
-                });
-                setWriter(oldWriter);
-                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
-                moduleElementDeclarationEmitInfo = [];
-            }
-            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
-                write("export {};");
-                writeLine();
-            }
-        });
-        if (usedTypeDirectiveReferences) {
-            for (var directive in usedTypeDirectiveReferences) {
-                if (ts.hasProperty(usedTypeDirectiveReferences, directive)) {
-                    referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
-                }
-            }
-        }
-        return {
-            reportedDeclarationError: reportedDeclarationError,
-            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
-            synchronousDeclarationOutput: writer.getText(),
-            referencesOutput: referencesOutput
-        };
-        function hasInternalAnnotation(range) {
-            var comment = currentText.substring(range.pos, range.end);
-            return comment.indexOf("@internal") >= 0;
-        }
-        function stripInternal(node) {
-            if (node) {
-                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
-                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
-                    return;
-                }
-                emitNode(node);
-            }
-        }
-        function createAndSetNewTextWriterWithSymbolWriter() {
-            var writer = ts.createTextWriter(newLine);
-            writer.trackSymbol = trackSymbol;
-            writer.reportInaccessibleThisError = reportInaccessibleThisError;
-            writer.writeKeyword = writer.write;
-            writer.writeOperator = writer.write;
-            writer.writePunctuation = writer.write;
-            writer.writeSpace = writer.write;
-            writer.writeStringLiteral = writer.writeLiteral;
-            writer.writeParameter = writer.write;
-            writer.writeSymbol = writer.write;
-            setWriter(writer);
-        }
-        function setWriter(newWriter) {
-            writer = newWriter;
-            write = newWriter.write;
-            writeTextOfNode = newWriter.writeTextOfNode;
-            writeLine = newWriter.writeLine;
-            increaseIndent = newWriter.increaseIndent;
-            decreaseIndent = newWriter.decreaseIndent;
-        }
-        function writeAsynchronousModuleElements(nodes) {
-            var oldWriter = writer;
-            ts.forEach(nodes, function (declaration) {
-                var nodeToCheck;
-                if (declaration.kind === 218) {
-                    nodeToCheck = declaration.parent.parent;
-                }
-                else if (declaration.kind === 233 || declaration.kind === 234 || declaration.kind === 231) {
-                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
-                }
-                else {
-                    nodeToCheck = declaration;
-                }
-                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
-                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                }
-                if (moduleElementEmitInfo) {
-                    if (moduleElementEmitInfo.node.kind === 230) {
-                        moduleElementEmitInfo.isVisible = true;
-                    }
-                    else {
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
-                            increaseIndent();
-                        }
-                        if (nodeToCheck.kind === 225) {
-                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
-                            asynchronousSubModuleDeclarationEmitInfo = [];
-                        }
-                        writeModuleElement(nodeToCheck);
-                        if (nodeToCheck.kind === 225) {
-                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
-                            asynchronousSubModuleDeclarationEmitInfo = undefined;
-                        }
-                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
-                    }
-                }
-            });
-            setWriter(oldWriter);
-        }
-        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
-            if (!typeReferenceDirectives) {
-                return;
-            }
-            if (!usedTypeDirectiveReferences) {
-                usedTypeDirectiveReferences = {};
-            }
-            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
-                var directive = typeReferenceDirectives_1[_i];
-                if (!ts.hasProperty(usedTypeDirectiveReferences, directive)) {
-                    usedTypeDirectiveReferences[directive] = directive;
-                }
-            }
-        }
-        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
-            if (symbolAccessibilityResult.accessibility === 0) {
-                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
-                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
-                }
-            }
-            else {
-                reportedDeclarationError = true;
-                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
-                if (errorInfo) {
-                    if (errorInfo.typeName) {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                    else {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                }
-            }
-        }
-        function trackSymbol(symbol, enclosingDeclaration, meaning) {
-            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning));
-            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
-        }
-        function reportInaccessibleThisError() {
-            if (errorNameNode) {
-                reportedDeclarationError = true;
-                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
-            }
-        }
-        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (type) {
-                emitType(type);
-            }
-            else {
-                errorNameNode = declaration.name;
-                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, 2, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (signature.type) {
-                emitType(signature.type);
-            }
-            else {
-                errorNameNode = signature.name;
-                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 2, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function emitLines(nodes) {
-            for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
-                var node = nodes_2[_i];
-                emit(node);
-            }
-        }
-        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
-            var currentWriterPos = writer.getTextPos();
-            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
-                var node = nodes_3[_i];
-                if (!canEmitFn || canEmitFn(node)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        write(separator);
-                    }
-                    currentWriterPos = writer.getTextPos();
-                    eachNodeEmitFn(node);
-                }
-            }
-        }
-        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
-            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
-        }
-        function writeJsDocComments(declaration) {
-            if (declaration) {
-                var jsDocComments = ts.getJsDocCommentsFromText(declaration, currentText);
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
-                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, true, newLine, ts.writeCommentRange);
-            }
-        }
-        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            emitType(type);
-        }
-        function emitType(type) {
-            switch (type.kind) {
-                case 117:
-                case 132:
-                case 130:
-                case 120:
-                case 133:
-                case 103:
-                case 135:
-                case 93:
-                case 127:
-                case 165:
-                case 166:
-                    return writeTextOfNode(currentText, type);
-                case 194:
-                    return emitExpressionWithTypeArguments(type);
-                case 155:
-                    return emitTypeReference(type);
-                case 158:
-                    return emitTypeQuery(type);
-                case 160:
-                    return emitArrayType(type);
-                case 161:
-                    return emitTupleType(type);
-                case 162:
-                    return emitUnionType(type);
-                case 163:
-                    return emitIntersectionType(type);
-                case 164:
-                    return emitParenType(type);
-                case 156:
-                case 157:
-                    return emitSignatureDeclarationWithJsDocComments(type);
-                case 159:
-                    return emitTypeLiteral(type);
-                case 69:
-                    return emitEntityName(type);
-                case 139:
-                    return emitEntityName(type);
-                case 154:
-                    return emitTypePredicate(type);
-            }
-            function writeEntityName(entityName) {
-                if (entityName.kind === 69) {
-                    writeTextOfNode(currentText, entityName);
-                }
-                else {
-                    var left = entityName.kind === 139 ? entityName.left : entityName.expression;
-                    var right = entityName.kind === 139 ? entityName.right : entityName.name;
-                    writeEntityName(left);
-                    write(".");
-                    writeTextOfNode(currentText, right);
-                }
-            }
-            function emitEntityName(entityName) {
-                var visibilityResult = resolver.isEntityNameVisible(entityName, entityName.parent.kind === 229 ? entityName.parent : enclosingDeclaration);
-                handleSymbolAccessibilityError(visibilityResult);
-                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
-                writeEntityName(entityName);
-            }
-            function emitExpressionWithTypeArguments(node) {
-                if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                    ts.Debug.assert(node.expression.kind === 69 || node.expression.kind === 172);
-                    emitEntityName(node.expression);
-                    if (node.typeArguments) {
-                        write("<");
-                        emitCommaList(node.typeArguments, emitType);
-                        write(">");
-                    }
-                }
-            }
-            function emitTypeReference(type) {
-                emitEntityName(type.typeName);
-                if (type.typeArguments) {
-                    write("<");
-                    emitCommaList(type.typeArguments, emitType);
-                    write(">");
-                }
-            }
-            function emitTypePredicate(type) {
-                writeTextOfNode(currentText, type.parameterName);
-                write(" is ");
-                emitType(type.type);
-            }
-            function emitTypeQuery(type) {
-                write("typeof ");
-                emitEntityName(type.exprName);
-            }
-            function emitArrayType(type) {
-                emitType(type.elementType);
-                write("[]");
-            }
-            function emitTupleType(type) {
-                write("[");
-                emitCommaList(type.elementTypes, emitType);
-                write("]");
-            }
-            function emitUnionType(type) {
-                emitSeparatedList(type.types, " | ", emitType);
-            }
-            function emitIntersectionType(type) {
-                emitSeparatedList(type.types, " & ", emitType);
-            }
-            function emitParenType(type) {
-                write("(");
-                emitType(type.type);
-                write(")");
-            }
-            function emitTypeLiteral(type) {
-                write("{");
-                if (type.members.length) {
-                    writeLine();
-                    increaseIndent();
-                    emitLines(type.members);
-                    decreaseIndent();
-                }
-                write("}");
-            }
-        }
-        function emitSourceFile(node) {
-            currentText = node.text;
-            currentLineMap = ts.getLineStarts(node);
-            currentIdentifiers = node.identifiers;
-            isCurrentFileExternalModule = ts.isExternalModule(node);
-            enclosingDeclaration = node;
-            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, true);
-            emitLines(node.statements);
-        }
-        function getExportDefaultTempVariableName() {
-            var baseName = "_default";
-            if (!ts.hasProperty(currentIdentifiers, baseName)) {
-                return baseName;
-            }
-            var count = 0;
-            while (true) {
-                count++;
-                var name_22 = baseName + "_" + count;
-                if (!ts.hasProperty(currentIdentifiers, name_22)) {
-                    return name_22;
-                }
-            }
-        }
-        function emitExportAssignment(node) {
-            if (node.expression.kind === 69) {
-                write(node.isExportEquals ? "export = " : "export default ");
-                writeTextOfNode(currentText, node.expression);
-            }
-            else {
-                var tempVarName = getExportDefaultTempVariableName();
-                if (!noDeclare) {
-                    write("declare ");
-                }
-                write("var ");
-                write(tempVarName);
-                write(": ");
-                writer.getSymbolAccessibilityDiagnostic = getDefaultExportAccessibilityDiagnostic;
-                resolver.writeTypeOfExpression(node.expression, enclosingDeclaration, 2, writer);
-                write(";");
-                writeLine();
-                write(node.isExportEquals ? "export = " : "export default ");
-                write(tempVarName);
-            }
-            write(";");
-            writeLine();
-            if (node.expression.kind === 69) {
-                var nodes = resolver.collectLinkedAliases(node.expression);
-                writeAsynchronousModuleElements(nodes);
-            }
-            function getDefaultExportAccessibilityDiagnostic(diagnostic) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
-                    errorNode: node
-                };
-            }
-        }
-        function isModuleElementVisible(node) {
-            return resolver.isDeclarationVisible(node);
-        }
-        function emitModuleElement(node, isModuleElementVisible) {
-            if (isModuleElementVisible) {
-                writeModuleElement(node);
-            }
-            else if (node.kind === 229 ||
-                (node.parent.kind === 256 && isCurrentFileExternalModule)) {
-                var isVisible = void 0;
-                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 256) {
-                    asynchronousSubModuleDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-                else {
-                    if (node.kind === 230) {
-                        var importDeclaration = node;
-                        if (importDeclaration.importClause) {
-                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
-                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
-                        }
-                    }
-                    moduleElementDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-            }
-        }
-        function writeModuleElement(node) {
-            switch (node.kind) {
-                case 220:
-                    return writeFunctionDeclaration(node);
-                case 200:
-                    return writeVariableStatement(node);
-                case 222:
-                    return writeInterfaceDeclaration(node);
-                case 221:
-                    return writeClassDeclaration(node);
-                case 223:
-                    return writeTypeAliasDeclaration(node);
-                case 224:
-                    return writeEnumDeclaration(node);
-                case 225:
-                    return writeModuleDeclaration(node);
-                case 229:
-                    return writeImportEqualsDeclaration(node);
-                case 230:
-                    return writeImportDeclaration(node);
-                default:
-                    ts.Debug.fail("Unknown symbol kind");
-            }
-        }
-        function emitModuleElementDeclarationFlags(node) {
-            if (node.parent.kind === 256) {
-                if (node.flags & 1) {
-                    write("export ");
-                }
-                if (node.flags & 512) {
-                    write("default ");
-                }
-                else if (node.kind !== 222 && !noDeclare) {
-                    write("declare ");
-                }
-            }
-        }
-        function emitClassMemberDeclarationFlags(flags) {
-            if (flags & 8) {
-                write("private ");
-            }
-            else if (flags & 16) {
-                write("protected ");
-            }
-            if (flags & 32) {
-                write("static ");
-            }
-            if (flags & 64) {
-                write("readonly ");
-            }
-            if (flags & 128) {
-                write("abstract ");
-            }
-        }
-        function writeImportEqualsDeclaration(node) {
-            emitJsDocComments(node);
-            if (node.flags & 1) {
-                write("export ");
-            }
-            write("import ");
-            writeTextOfNode(currentText, node.name);
-            write(" = ");
-            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
-                write(";");
-            }
-            else {
-                write("require(");
-                emitExternalModuleSpecifier(node);
-                write(");");
-            }
-            writer.writeLine();
-            function getImportEntityNameVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
-                    errorNode: node,
-                    typeName: node.name
-                };
-            }
-        }
-        function isVisibleNamedBinding(namedBindings) {
-            if (namedBindings) {
-                if (namedBindings.kind === 232) {
-                    return resolver.isDeclarationVisible(namedBindings);
-                }
-                else {
-                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
-                }
-            }
-        }
-        function writeImportDeclaration(node) {
-            emitJsDocComments(node);
-            if (node.flags & 1) {
-                write("export ");
-            }
-            write("import ");
-            if (node.importClause) {
-                var currentWriterPos = writer.getTextPos();
-                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
-                    writeTextOfNode(currentText, node.importClause.name);
-                }
-                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        write(", ");
-                    }
-                    if (node.importClause.namedBindings.kind === 232) {
-                        write("* as ");
-                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
-                    }
-                    else {
-                        write("{ ");
-                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
-                        write(" }");
-                    }
-                }
-                write(" from ");
-            }
-            emitExternalModuleSpecifier(node);
-            write(";");
-            writer.writeLine();
-        }
-        function emitExternalModuleSpecifier(parent) {
-            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 225;
-            var moduleSpecifier;
-            if (parent.kind === 229) {
-                var node = parent;
-                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
-            }
-            else if (parent.kind === 225) {
-                moduleSpecifier = parent.name;
-            }
-            else {
-                var node = parent;
-                moduleSpecifier = node.moduleSpecifier;
-            }
-            if (moduleSpecifier.kind === 9 && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
-                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
-                if (moduleName) {
-                    write('"');
-                    write(moduleName);
-                    write('"');
-                    return;
-                }
-            }
-            writeTextOfNode(currentText, moduleSpecifier);
-        }
-        function emitImportOrExportSpecifier(node) {
-            if (node.propertyName) {
-                writeTextOfNode(currentText, node.propertyName);
-                write(" as ");
-            }
-            writeTextOfNode(currentText, node.name);
-        }
-        function emitExportSpecifier(node) {
-            emitImportOrExportSpecifier(node);
-            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
-            writeAsynchronousModuleElements(nodes);
-        }
-        function emitExportDeclaration(node) {
-            emitJsDocComments(node);
-            write("export ");
-            if (node.exportClause) {
-                write("{ ");
-                emitCommaList(node.exportClause.elements, emitExportSpecifier);
-                write(" }");
-            }
-            else {
-                write("*");
-            }
-            if (node.moduleSpecifier) {
-                write(" from ");
-                emitExternalModuleSpecifier(node);
-            }
-            write(";");
-            writer.writeLine();
-        }
-        function writeModuleDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isGlobalScopeAugmentation(node)) {
-                write("global ");
-            }
-            else {
-                if (node.flags & 4096) {
-                    write("namespace ");
-                }
-                else {
-                    write("module ");
-                }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    emitExternalModuleSpecifier(node);
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                }
-            }
-            while (node.body.kind !== 226) {
-                node = node.body;
-                write(".");
-                writeTextOfNode(currentText, node.name);
-            }
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.body.statements);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function writeTypeAliasDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("type ");
-            writeTextOfNode(currentText, node.name);
-            emitTypeParameters(node.typeParameters);
-            write(" = ");
-            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
-            write(";");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-            function getTypeAliasDeclarationVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
-                    errorNode: node.type,
-                    typeName: node.name
-                };
-            }
-        }
-        function writeEnumDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isConst(node)) {
-                write("const ");
-            }
-            write("enum ");
-            writeTextOfNode(currentText, node.name);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-        }
-        function emitEnumMemberDeclaration(node) {
-            emitJsDocComments(node);
-            writeTextOfNode(currentText, node.name);
-            var enumMemberValue = resolver.getConstantValue(node);
-            if (enumMemberValue !== undefined) {
-                write(" = ");
-                write(enumMemberValue.toString());
-            }
-            write(",");
-            writeLine();
-        }
-        function isPrivateMethodTypeParameter(node) {
-            return node.parent.kind === 147 && (node.parent.flags & 8);
-        }
-        function emitTypeParameters(typeParameters) {
-            function emitTypeParameter(node) {
-                increaseIndent();
-                emitJsDocComments(node);
-                decreaseIndent();
-                writeTextOfNode(currentText, node.name);
-                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
-                    write(" extends ");
-                    if (node.parent.kind === 156 ||
-                        node.parent.kind === 157 ||
-                        (node.parent.parent && node.parent.parent.kind === 159)) {
-                        ts.Debug.assert(node.parent.kind === 147 ||
-                            node.parent.kind === 146 ||
-                            node.parent.kind === 156 ||
-                            node.parent.kind === 157 ||
-                            node.parent.kind === 151 ||
-                            node.parent.kind === 152);
-                        emitType(node.constraint);
-                    }
-                    else {
-                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
-                    }
-                }
-                function getTypeParameterConstraintVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage;
-                    switch (node.parent.kind) {
-                        case 221:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
-                            break;
-                        case 222:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 152:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 151:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 147:
-                        case 146:
-                            if (node.parent.flags & 32) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else if (node.parent.parent.kind === 221) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
-                            }
-                            break;
-                        case 220:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                            break;
-                        default:
-                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.name
-                    };
-                }
-            }
-            if (typeParameters) {
-                write("<");
-                emitCommaList(typeParameters, emitTypeParameter);
-                write(">");
-            }
-        }
-        function emitHeritageClause(typeReferences, isImplementsList) {
-            if (typeReferences) {
-                write(isImplementsList ? " implements " : " extends ");
-                emitCommaList(typeReferences, emitTypeOfTypeReference);
-            }
-            function emitTypeOfTypeReference(node) {
-                if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
-                }
-                else if (!isImplementsList && node.expression.kind === 93) {
-                    write("null");
-                }
-                else {
-                    writer.getSymbolAccessibilityDiagnostic = getHeritageClauseVisibilityError;
-                    resolver.writeBaseConstructorTypeOfClass(enclosingDeclaration, enclosingDeclaration, 2, writer);
-                }
-                function getHeritageClauseVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage;
-                    if (node.parent.parent.kind === 221) {
-                        diagnosticMessage = isImplementsList ?
-                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
-                            ts.Diagnostics.Extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        diagnosticMessage = ts.Diagnostics.Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.parent.parent.name
-                    };
-                }
-            }
-        }
-        function writeClassDeclaration(node) {
-            function emitParameterProperties(constructorDeclaration) {
-                if (constructorDeclaration) {
-                    ts.forEach(constructorDeclaration.parameters, function (param) {
-                        if (param.flags & 92) {
-                            emitPropertyDeclaration(param);
-                        }
-                    });
-                }
-            }
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (node.flags & 128) {
-                write("abstract ");
-            }
-            write("class ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                emitHeritageClause([baseTypeNode], false);
-            }
-            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), true);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitParameterProperties(ts.getFirstConstructorWithBody(node));
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function writeInterfaceDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("interface ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            emitHeritageClause(ts.getInterfaceBaseTypeNodes(node), false);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function emitPropertyDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            emitJsDocComments(node);
-            emitClassMemberDeclarationFlags(node.flags);
-            emitVariableDeclaration(node);
-            write(";");
-            writeLine();
-        }
-        function emitVariableDeclaration(node) {
-            if (node.kind !== 218 || resolver.isDeclarationVisible(node)) {
-                if (ts.isBindingPattern(node.name)) {
-                    emitBindingPattern(node.name);
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                    if ((node.kind === 145 || node.kind === 144 || node.kind === 142) && ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                    if ((node.kind === 145 || node.kind === 144) && node.parent.kind === 159) {
-                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
-                    }
-                    else if (!(node.flags & 8)) {
-                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                if (node.kind === 218) {
-                    return symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 ?
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
-                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
-                }
-                else if (node.kind === 145 || node.kind === 144) {
-                    if (node.flags & 32) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else if (node.parent.kind === 221) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
-            }
-            function emitBindingPattern(bindingPattern) {
-                var elements = [];
-                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (element.kind !== 193) {
-                        elements.push(element);
-                    }
-                }
-                emitCommaList(elements, emitBindingElement);
-            }
-            function emitBindingElement(bindingElement) {
-                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                    return diagnosticMessage !== undefined ? {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: bindingElement,
-                        typeName: bindingElement.name
-                    } : undefined;
-                }
-                if (bindingElement.name) {
-                    if (ts.isBindingPattern(bindingElement.name)) {
-                        emitBindingPattern(bindingElement.name);
-                    }
-                    else {
-                        writeTextOfNode(currentText, bindingElement.name);
-                        writeTypeOfDeclaration(bindingElement, undefined, getBindingElementTypeVisibilityError);
-                    }
-                }
-            }
-        }
-        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
-            if (node.type) {
-                write(": ");
-                emitType(node.type);
-            }
-        }
-        function isVariableStatementVisible(node) {
-            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
-        }
-        function writeVariableStatement(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isLet(node.declarationList)) {
-                write("let ");
-            }
-            else if (ts.isConst(node.declarationList)) {
-                write("const ");
-            }
-            else {
-                write("var ");
-            }
-            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
-            write(";");
-            writeLine();
-        }
-        function emitAccessorDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-            var accessorWithTypeAnnotation;
-            if (node === accessors.firstAccessor) {
-                emitJsDocComments(accessors.getAccessor);
-                emitJsDocComments(accessors.setAccessor);
-                emitClassMemberDeclarationFlags(node.flags | (accessors.setAccessor ? 0 : 64));
-                writeTextOfNode(currentText, node.name);
-                if (!(node.flags & 8)) {
-                    accessorWithTypeAnnotation = node;
-                    var type = getTypeAnnotationFromAccessor(node);
-                    if (!type) {
-                        var anotherAccessor = node.kind === 149 ? accessors.setAccessor : accessors.getAccessor;
-                        type = getTypeAnnotationFromAccessor(anotherAccessor);
-                        if (type) {
-                            accessorWithTypeAnnotation = anotherAccessor;
-                        }
-                    }
-                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
-                }
-                write(";");
-                writeLine();
-            }
-            function getTypeAnnotationFromAccessor(accessor) {
-                if (accessor) {
-                    return accessor.kind === 149
-                        ? accessor.type
-                        : accessor.parameters.length > 0
-                            ? accessor.parameters[0].type
-                            : undefined;
-                }
-            }
-            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                if (accessorWithTypeAnnotation.kind === 150) {
-                    if (accessorWithTypeAnnotation.parent.flags & 32) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.parameters[0],
-                        typeName: accessorWithTypeAnnotation.name
-                    };
-                }
-                else {
-                    if (accessorWithTypeAnnotation.flags & 32) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
-                    }
-                    else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.name,
-                        typeName: undefined
-                    };
-                }
-            }
-        }
-        function writeFunctionDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            if (!resolver.isImplementationOfOverload(node)) {
-                emitJsDocComments(node);
-                if (node.kind === 220) {
-                    emitModuleElementDeclarationFlags(node);
-                }
-                else if (node.kind === 147 || node.kind === 148) {
-                    emitClassMemberDeclarationFlags(node.flags);
-                }
-                if (node.kind === 220) {
-                    write("function ");
-                    writeTextOfNode(currentText, node.name);
-                }
-                else if (node.kind === 148) {
-                    write("constructor");
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                    if (ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                }
-                emitSignatureDeclaration(node);
-            }
-        }
-        function emitSignatureDeclarationWithJsDocComments(node) {
-            emitJsDocComments(node);
-            emitSignatureDeclaration(node);
-        }
-        function emitSignatureDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            var closeParenthesizedFunctionType = false;
-            if (node.kind === 153) {
-                emitClassMemberDeclarationFlags(node.flags);
-                write("[");
-            }
-            else {
-                if (node.kind === 152 || node.kind === 157) {
-                    write("new ");
-                }
-                else if (node.kind === 156) {
-                    var currentOutput = writer.getText();
-                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
-                        closeParenthesizedFunctionType = true;
-                        write("(");
-                    }
-                }
-                emitTypeParameters(node.typeParameters);
-                write("(");
-            }
-            emitCommaList(node.parameters, emitParameterDeclaration);
-            if (node.kind === 153) {
-                write("]");
-            }
-            else {
-                write(")");
-            }
-            var isFunctionTypeOrConstructorType = node.kind === 156 || node.kind === 157;
-            if (isFunctionTypeOrConstructorType || node.parent.kind === 159) {
-                if (node.type) {
-                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
-                    emitType(node.type);
-                }
-            }
-            else if (node.kind !== 148 && !(node.flags & 8)) {
-                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
-            }
-            enclosingDeclaration = prevEnclosingDeclaration;
-            if (!isFunctionTypeOrConstructorType) {
-                write(";");
-                writeLine();
-            }
-            else if (closeParenthesizedFunctionType) {
-                write(")");
-            }
-            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                switch (node.kind) {
-                    case 152:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 151:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 153:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 147:
-                    case 146:
-                        if (node.flags & 32) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 ?
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
-                        }
-                        else if (node.parent.kind === 221) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 ?
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
-                        }
-                        else {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
-                        }
-                        break;
-                    case 220:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
-                        break;
-                    default:
-                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
-                }
-                return {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node.name || node
-                };
-            }
-        }
-        function emitParameterDeclaration(node) {
-            increaseIndent();
-            emitJsDocComments(node);
-            if (node.dotDotDotToken) {
-                write("...");
-            }
-            if (ts.isBindingPattern(node.name)) {
-                emitBindingPattern(node.name);
-            }
-            else {
-                writeTextOfNode(currentText, node.name);
-            }
-            if (resolver.isOptionalParameter(node)) {
-                write("?");
-            }
-            decreaseIndent();
-            if (node.parent.kind === 156 ||
-                node.parent.kind === 157 ||
-                node.parent.parent.kind === 159) {
-                emitTypeOfVariableDeclarationFromTypeLiteral(node);
-            }
-            else if (!(node.parent.flags & 8)) {
-                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
-            }
-            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
-            }
-            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                switch (node.parent.kind) {
-                    case 148:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
-                    case 152:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 151:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 147:
-                    case 146:
-                        if (node.parent.flags & 32) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 ?
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else if (node.parent.parent.kind === 221) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 ?
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
-                        }
-                    case 220:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                    default:
-                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
-                }
-            }
-            function emitBindingPattern(bindingPattern) {
-                if (bindingPattern.kind === 167) {
-                    write("{");
-                    emitCommaList(bindingPattern.elements, emitBindingElement);
-                    write("}");
-                }
-                else if (bindingPattern.kind === 168) {
-                    write("[");
-                    var elements = bindingPattern.elements;
-                    emitCommaList(elements, emitBindingElement);
-                    if (elements && elements.hasTrailingComma) {
-                        write(", ");
-                    }
-                    write("]");
-                }
-            }
-            function emitBindingElement(bindingElement) {
-                if (bindingElement.kind === 193) {
-                    write(" ");
-                }
-                else if (bindingElement.kind === 169) {
-                    if (bindingElement.propertyName) {
-                        writeTextOfNode(currentText, bindingElement.propertyName);
-                        write(": ");
-                    }
-                    if (bindingElement.name) {
-                        if (ts.isBindingPattern(bindingElement.name)) {
-                            emitBindingPattern(bindingElement.name);
-                        }
-                        else {
-                            ts.Debug.assert(bindingElement.name.kind === 69);
-                            if (bindingElement.dotDotDotToken) {
-                                write("...");
-                            }
-                            writeTextOfNode(currentText, bindingElement.name);
-                        }
-                    }
-                }
-            }
-        }
-        function emitNode(node) {
-            switch (node.kind) {
-                case 220:
-                case 225:
-                case 229:
-                case 222:
-                case 221:
-                case 223:
-                case 224:
-                    return emitModuleElement(node, isModuleElementVisible(node));
-                case 200:
-                    return emitModuleElement(node, isVariableStatementVisible(node));
-                case 230:
-                    return emitModuleElement(node, !node.importClause);
-                case 236:
-                    return emitExportDeclaration(node);
-                case 148:
-                case 147:
-                case 146:
-                    return writeFunctionDeclaration(node);
-                case 152:
-                case 151:
-                case 153:
-                    return emitSignatureDeclarationWithJsDocComments(node);
-                case 149:
-                case 150:
-                    return emitAccessorDeclaration(node);
-                case 145:
-                case 144:
-                    return emitPropertyDeclaration(node);
-                case 255:
-                    return emitEnumMemberDeclaration(node);
-                case 235:
-                    return emitExportAssignment(node);
-                case 256:
-                    return emitSourceFile(node);
-            }
-        }
-        function writeReferencePath(referencedFile, addBundledFileReference) {
-            var declFileName;
-            var addedBundledEmitReference = false;
-            if (ts.isDeclarationFile(referencedFile)) {
-                declFileName = referencedFile.fileName;
-            }
-            else {
-                ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile);
-            }
-            if (declFileName) {
-                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, false);
-                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
-            }
-            return addedBundledEmitReference;
-            function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) {
-                if (isBundledEmit && !addBundledFileReference) {
-                    return;
-                }
-                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
-                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
-                addedBundledEmitReference = isBundledEmit;
-            }
-        }
-    }
-    function writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) {
-        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit);
-        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
-        if (!emitSkipped) {
-            var declarationOutput = emitDeclarationResult.referencesOutput
-                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
-            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
-        }
-        return emitSkipped;
-        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
-            var appliedSyncOutputPos = 0;
-            var declarationOutput = "";
-            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                if (aliasEmitInfo.asynchronousOutput) {
-                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
-                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
-                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
-                }
-            });
-            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
-            return declarationOutput;
-        }
-    }
-    ts.writeDeclarationFile = writeDeclarationFile;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getResolvedExternalModuleName(host, file) {
-        return file.moduleName || ts.getExternalModuleNameFromPath(host, file.fileName);
-    }
-    ts.getResolvedExternalModuleName = getResolvedExternalModuleName;
-    function getExternalModuleNameFromDeclaration(host, resolver, declaration) {
-        var file = resolver.getExternalModuleFileFromDeclaration(declaration);
-        if (!file || ts.isDeclarationFile(file)) {
-            return undefined;
-        }
-        return getResolvedExternalModuleName(host, file);
-    }
-    ts.getExternalModuleNameFromDeclaration = getExternalModuleNameFromDeclaration;
-    var entities = {
-        "quot": 0x0022,
-        "amp": 0x0026,
-        "apos": 0x0027,
-        "lt": 0x003C,
-        "gt": 0x003E,
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-        "iexcl": 0x00A1,
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-        "sect": 0x00A7,
-        "uml": 0x00A8,
-        "copy": 0x00A9,
-        "ordf": 0x00AA,
-        "laquo": 0x00AB,
-        "not": 0x00AC,
-        "shy": 0x00AD,
-        "reg": 0x00AE,
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-        "plusmn": 0x00B1,
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-        "sup3": 0x00B3,
-        "acute": 0x00B4,
-        "micro": 0x00B5,
-        "para": 0x00B6,
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-        "aring": 0x00E5,
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-        "ccedil": 0x00E7,
-        "egrave": 0x00E8,
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-        "alpha": 0x03B1,
-        "beta": 0x03B2,
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-        "mu": 0x03BC,
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-        "omicron": 0x03BF,
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-        "sigma": 0x03C3,
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-        "upsilon": 0x03C5,
-        "phi": 0x03C6,
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-        "psi": 0x03C8,
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-        "lsquo": 0x2018,
-        "rsquo": 0x2019,
-        "sbquo": 0x201A,
-        "ldquo": 0x201C,
-        "rdquo": 0x201D,
-        "bdquo": 0x201E,
-        "dagger": 0x2020,
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-        "hellip": 0x2026,
-        "permil": 0x2030,
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-        "Prime": 0x2033,
-        "lsaquo": 0x2039,
-        "rsaquo": 0x203A,
-        "oline": 0x203E,
-        "frasl": 0x2044,
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-        "image": 0x2111,
-        "weierp": 0x2118,
-        "real": 0x211C,
-        "trade": 0x2122,
-        "alefsym": 0x2135,
-        "larr": 0x2190,
-        "uarr": 0x2191,
-        "rarr": 0x2192,
-        "darr": 0x2193,
-        "harr": 0x2194,
-        "crarr": 0x21B5,
-        "lArr": 0x21D0,
-        "uArr": 0x21D1,
-        "rArr": 0x21D2,
-        "dArr": 0x21D3,
-        "hArr": 0x21D4,
-        "forall": 0x2200,
-        "part": 0x2202,
-        "exist": 0x2203,
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-        "ni": 0x220B,
-        "prod": 0x220F,
-        "sum": 0x2211,
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-        "lowast": 0x2217,
-        "radic": 0x221A,
-        "prop": 0x221D,
-        "infin": 0x221E,
-        "ang": 0x2220,
-        "and": 0x2227,
-        "or": 0x2228,
-        "cap": 0x2229,
-        "cup": 0x222A,
-        "int": 0x222B,
-        "there4": 0x2234,
-        "sim": 0x223C,
-        "cong": 0x2245,
-        "asymp": 0x2248,
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-        "equiv": 0x2261,
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-        "sub": 0x2282,
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-        "nsub": 0x2284,
-        "sube": 0x2286,
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-        "oplus": 0x2295,
-        "otimes": 0x2297,
-        "perp": 0x22A5,
-        "sdot": 0x22C5,
-        "lceil": 0x2308,
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-        "lfloor": 0x230A,
-        "rfloor": 0x230B,
-        "lang": 0x2329,
-        "rang": 0x232A,
-        "loz": 0x25CA,
-        "spades": 0x2660,
-        "clubs": 0x2663,
-        "hearts": 0x2665,
-        "diams": 0x2666
-    };
-    function emitFiles(resolver, host, targetSourceFile) {
-        var extendsHelper = "\nvar __extends = (this && this.__extends) || function (d, b) {\n    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n    function __() { this.constructor = d; }\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n};";
-        var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n    for (var s, i = 1, n = arguments.length; i < n; i++) {\n        s = arguments[i];\n        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n            t[p] = s[p];\n    }\n    return t;\n};";
-        var decorateHelper = "\nvar __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\n};";
-        var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};";
-        var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n    return function (target, key) { decorator(target, key, paramIndex); }\n};";
-        var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n    return new (P || (P = Promise))(function (resolve, reject) {\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n        step((generator = generator.apply(thisArg, _arguments)).next());\n    });\n};";
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-        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
-        var modulekind = ts.getEmitModuleKind(compilerOptions);
-        var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
-        var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined;
-        var emitterDiagnostics = ts.createDiagnosticCollection();
-        var emitSkipped = false;
-        var newLine = host.getNewLine();
-        var emitJavaScript = createFileEmitter();
-        ts.forEachExpectedEmitFile(host, emitFile, targetSourceFile);
-        return {
-            emitSkipped: emitSkipped,
-            diagnostics: emitterDiagnostics.getDiagnostics(),
-            emittedFiles: emittedFilesList,
-            sourceMaps: sourceMapDataList
-        };
-        function isUniqueLocalName(name, container) {
-            for (var node = container; ts.isNodeDescendentOf(node, container); node = node.nextContainer) {
-                if (node.locals && ts.hasProperty(node.locals, name)) {
-                    if (node.locals[name].flags & (107455 | 1048576 | 8388608)) {
-                        return false;
-                    }
-                }
-            }
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-                    state.labeledNonLocalBreaks = {};
-                }
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-                    state.labeledNonLocalContinues = {};
-                }
-                state.labeledNonLocalContinues[labelText] = labelMarker;
-            }
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-        function hoistVariableDeclarationFromLoop(state, declaration) {
-            if (!state.hoistedLocalVariables) {
-                state.hoistedLocalVariables = [];
-            }
-            visit(declaration.name);
-            function visit(node) {
-                if (node.kind === 69) {
-                    state.hoistedLocalVariables.push(node);
-                }
-                else {
-                    for (var _a = 0, _b = node.elements; _a < _b.length; _a++) {
-                        var element = _b[_a];
-                        visit(element.name);
-                    }
-                }
-            }
-        }
-        function createFileEmitter() {
-            var writer = ts.createTextWriter(newLine);
-            var write = writer.write, writeTextOfNode = writer.writeTextOfNode, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent;
-            var sourceMap = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? ts.createSourceMapWriter(host, writer) : ts.getNullSourceMapWriter();
-            var setSourceFile = sourceMap.setSourceFile, emitStart = sourceMap.emitStart, emitEnd = sourceMap.emitEnd, emitPos = sourceMap.emitPos;
-            var currentSourceFile;
-            var currentText;
-            var currentLineMap;
-            var currentFileIdentifiers;
-            var renamedDependencies;
-            var isEs6Module;
-            var isCurrentFileExternalModule;
-            var exportFunctionForFile;
-            var contextObjectForFile;
-            var generatedNameSet;
-            var nodeToGeneratedName;
-            var computedPropertyNamesToGeneratedNames;
-            var decoratedClassAliases;
-            var convertedLoopState;
-            var extendsEmitted;
-            var assignEmitted;
-            var decorateEmitted;
-            var paramEmitted;
-            var awaiterEmitted;
-            var tempFlags = 0;
-            var tempVariables;
-            var tempParameters;
-            var externalImports;
-            var exportSpecifiers;
-            var exportEquals;
-            var hasExportStarsToExportValues;
-            var detachedCommentsInfo;
-            var sourceMapData;
-            var isOwnFileEmit;
-            var emitLeadingCommentsOfPosition = compilerOptions.removeComments ? function (pos) { } : emitLeadingCommentsOfPositionWorker;
-            var setSourceMapWriterEmit = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? changeSourceMapEmit : function (writer) { };
-            var moduleEmitDelegates = (_a = {},
-                _a[ts.ModuleKind.ES6] = emitES6Module,
-                _a[ts.ModuleKind.AMD] = emitAMDModule,
-                _a[ts.ModuleKind.System] = emitSystemModule,
-                _a[ts.ModuleKind.UMD] = emitUMDModule,
-                _a[ts.ModuleKind.CommonJS] = emitCommonJSModule,
-                _a
-            );
-            var bundleEmitDelegates = (_b = {},
-                _b[ts.ModuleKind.ES6] = function () { },
-                _b[ts.ModuleKind.AMD] = emitAMDModule,
-                _b[ts.ModuleKind.System] = emitSystemModule,
-                _b[ts.ModuleKind.UMD] = function () { },
-                _b[ts.ModuleKind.CommonJS] = function () { },
-                _b
-            );
-            return doEmit;
-            function doEmit(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
-                sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
-                generatedNameSet = {};
-                nodeToGeneratedName = [];
-                decoratedClassAliases = [];
-                isOwnFileEmit = !isBundledEmit;
-                if (isBundledEmit && modulekind) {
-                    ts.forEach(sourceFiles, emitEmitHelpers);
-                }
-                ts.forEach(sourceFiles, emitSourceFile);
-                writeLine();
-                var sourceMappingURL = sourceMap.getSourceMappingURL();
-                if (sourceMappingURL) {
-                    write("//# sourceMappingURL=" + sourceMappingURL);
-                }
-                writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, compilerOptions.emitBOM, sourceFiles);
-                sourceMap.reset();
-                writer.reset();
-                currentSourceFile = undefined;
-                currentText = undefined;
-                currentLineMap = undefined;
-                exportFunctionForFile = undefined;
-                contextObjectForFile = undefined;
-                generatedNameSet = undefined;
-                nodeToGeneratedName = undefined;
-                decoratedClassAliases = undefined;
-                computedPropertyNamesToGeneratedNames = undefined;
-                convertedLoopState = undefined;
-                extendsEmitted = false;
-                decorateEmitted = false;
-                paramEmitted = false;
-                awaiterEmitted = false;
-                assignEmitted = false;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = undefined;
-                detachedCommentsInfo = undefined;
-                sourceMapData = undefined;
-                isEs6Module = false;
-                renamedDependencies = undefined;
-                isCurrentFileExternalModule = false;
-            }
-            function emitSourceFile(sourceFile) {
-                currentSourceFile = sourceFile;
-                currentText = sourceFile.text;
-                currentLineMap = ts.getLineStarts(sourceFile);
-                exportFunctionForFile = undefined;
-                contextObjectForFile = undefined;
-                isEs6Module = sourceFile.symbol && sourceFile.symbol.exports && !!sourceFile.symbol.exports["___esModule"];
-                renamedDependencies = sourceFile.renamedDependencies;
-                currentFileIdentifiers = sourceFile.identifiers;
-                isCurrentFileExternalModule = ts.isExternalModule(sourceFile);
-                setSourceFile(sourceFile);
-                emitNodeWithCommentsAndWithoutSourcemap(sourceFile);
-            }
-            function isUniqueName(name) {
-                return !resolver.hasGlobalName(name) &&
-                    !ts.hasProperty(currentFileIdentifiers, name) &&
-                    !ts.hasProperty(generatedNameSet, name);
-            }
-            function makeTempVariableName(flags) {
-                if (flags && !(tempFlags & flags)) {
-                    var name_23 = flags === 268435456 ? "_i" : "_n";
-                    if (isUniqueName(name_23)) {
-                        tempFlags |= flags;
-                        return name_23;
-                    }
-                }
-                while (true) {
-                    var count = tempFlags & 268435455;
-                    tempFlags++;
-                    if (count !== 8 && count !== 13) {
-                        var name_24 = count < 26 ? "_" + String.fromCharCode(97 + count) : "_" + (count - 26);
-                        if (isUniqueName(name_24)) {
-                            return name_24;
-                        }
-                    }
-                }
-            }
-            function makeUniqueName(baseName) {
-                if (baseName.charCodeAt(baseName.length - 1) !== 95) {
-                    baseName += "_";
-                }
-                var i = 1;
-                while (true) {
-                    var generatedName = baseName + i;
-                    if (isUniqueName(generatedName)) {
-                        return generatedNameSet[generatedName] = generatedName;
-                    }
-                    i++;
-                }
-            }
-            function generateNameForModuleOrEnum(node) {
-                var name = node.name.text;
-                return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
-            }
-            function generateNameForImportOrExportDeclaration(node) {
-                var expr = ts.getExternalModuleName(node);
-                var baseName = expr.kind === 9 ?
-                    ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module";
-                return makeUniqueName(baseName);
-            }
-            function generateNameForExportDefault() {
-                return makeUniqueName("default");
-            }
-            function generateNameForClassExpression() {
-                return makeUniqueName("class");
-            }
-            function generateNameForNode(node) {
-                switch (node.kind) {
-                    case 69:
-                        return makeUniqueName(node.text);
-                    case 225:
-                    case 224:
-                        return generateNameForModuleOrEnum(node);
-                    case 230:
-                    case 236:
-                        return generateNameForImportOrExportDeclaration(node);
-                    case 220:
-                    case 221:
-                    case 235:
-                        return generateNameForExportDefault();
-                    case 192:
-                        return generateNameForClassExpression();
-                }
-            }
-            function getGeneratedNameForNode(node) {
-                var id = ts.getNodeId(node);
-                return nodeToGeneratedName[id] || (nodeToGeneratedName[id] = ts.unescapeIdentifier(generateNameForNode(node)));
-            }
-            function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) {
-                if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
-                    ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), false, sourceFiles);
-                }
-                if (sourceMapDataList) {
-                    sourceMapDataList.push(sourceMap.getSourceMapData());
-                }
-                ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles);
-            }
-            function createTempVariable(flags) {
-                var result = ts.createSynthesizedNode(69);
-                result.text = makeTempVariableName(flags);
-                return result;
-            }
-            function recordTempDeclaration(name) {
-                if (!tempVariables) {
-                    tempVariables = [];
-                }
-                tempVariables.push(name);
-            }
-            function createAndRecordTempVariable(flags) {
-                var temp = createTempVariable(flags);
-                recordTempDeclaration(temp);
-                return temp;
-            }
-            function emitTempDeclarations(newLine) {
-                if (tempVariables) {
-                    if (newLine) {
-                        writeLine();
-                    }
-                    else {
-                        write(" ");
-                    }
-                    write("var ");
-                    emitCommaList(tempVariables);
-                    write(";");
-                }
-            }
-            function emitToken(tokenKind, startPos, emitFn) {
-                var tokenStartPos = ts.skipTrivia(currentText, startPos);
-                emitPos(tokenStartPos);
-                var tokenString = ts.tokenToString(tokenKind);
-                if (emitFn) {
-                    emitFn();
-                }
-                else {
-                    write(tokenString);
-                }
-                var tokenEndPos = tokenStartPos + tokenString.length;
-                emitPos(tokenEndPos);
-                return tokenEndPos;
-            }
-            function emitOptional(prefix, node) {
-                if (node) {
-                    write(prefix);
-                    emit(node);
-                }
-            }
-            function emitParenthesizedIf(node, parenthesized) {
-                if (parenthesized) {
-                    write("(");
-                }
-                emit(node);
-                if (parenthesized) {
-                    write(")");
-                }
-            }
-            function emitLinePreservingList(parent, nodes, allowTrailingComma, spacesBetweenBraces) {
-                ts.Debug.assert(nodes.length > 0);
-                increaseIndent();
-                if (nodeStartPositionsAreOnSameLine(parent, nodes[0])) {
-                    if (spacesBetweenBraces) {
-                        write(" ");
-                    }
-                }
-                else {
-                    writeLine();
-                }
-                for (var i = 0, n = nodes.length; i < n; i++) {
-                    if (i) {
-                        if (nodeEndIsOnSameLineAsNodeStart(nodes[i - 1], nodes[i])) {
-                            write(", ");
-                        }
-                        else {
-                            write(",");
-                            writeLine();
-                        }
-                    }
-                    emit(nodes[i]);
-                }
-                if (nodes.hasTrailingComma && allowTrailingComma) {
-                    write(",");
-                }
-                decreaseIndent();
-                if (nodeEndPositionsAreOnSameLine(parent, ts.lastOrUndefined(nodes))) {
-                    if (spacesBetweenBraces) {
-                        write(" ");
-                    }
-                }
-                else {
-                    writeLine();
-                }
-            }
-            function emitList(nodes, start, count, multiLine, trailingComma, leadingComma, noTrailingNewLine, emitNode) {
-                if (!emitNode) {
-                    emitNode = emit;
-                }
-                for (var i = 0; i < count; i++) {
-                    if (multiLine) {
-                        if (i || leadingComma) {
-                            write(",");
-                        }
-                        writeLine();
-                    }
-                    else {
-                        if (i || leadingComma) {
-                            write(", ");
-                        }
-                    }
-                    var node = nodes[start + i];
-                    emitTrailingCommentsOfPosition(node.pos);
-                    emitNode(node);
-                    leadingComma = true;
-                }
-                if (trailingComma) {
-                    write(",");
-                }
-                if (multiLine && !noTrailingNewLine) {
-                    writeLine();
-                }
-                return count;
-            }
-            function emitCommaList(nodes) {
-                if (nodes) {
-                    emitList(nodes, 0, nodes.length, false, false);
-                }
-            }
-            function emitLines(nodes) {
-                emitLinesStartingAt(nodes, 0);
-            }
-            function emitLinesStartingAt(nodes, startIndex) {
-                for (var i = startIndex; i < nodes.length; i++) {
-                    writeLine();
-                    emit(nodes[i]);
-                }
-            }
-            function isBinaryOrOctalIntegerLiteral(node, text) {
-                if (node.kind === 8 && text.length > 1) {
-                    switch (text.charCodeAt(1)) {
-                        case 98:
-                        case 66:
-                        case 111:
-                        case 79:
-                            return true;
-                    }
-                }
-                return false;
-            }
-            function emitLiteral(node) {
-                var text = getLiteralText(node);
-                if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap) && (node.kind === 9 || ts.isTemplateLiteralKind(node.kind))) {
-                    writer.writeLiteral(text);
-                }
-                else if (languageVersion < 2 && isBinaryOrOctalIntegerLiteral(node, text)) {
-                    write(node.text);
-                }
-                else {
-                    write(text);
-                }
-            }
-            function getLiteralText(node) {
-                if (languageVersion < 2 && (ts.isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) {
-                    return getQuotedEscapedLiteralText('"', node.text, '"');
-                }
-                if (node.parent) {
-                    return ts.getTextOfNodeFromSourceText(currentText, node);
-                }
-                switch (node.kind) {
-                    case 9:
-                        return getQuotedEscapedLiteralText('"', node.text, '"');
-                    case 11:
-                        return getQuotedEscapedLiteralText("`", node.text, "`");
-                    case 12:
-                        return getQuotedEscapedLiteralText("`", node.text, "${");
-                    case 13:
-                        return getQuotedEscapedLiteralText("}", node.text, "${");
-                    case 14:
-                        return getQuotedEscapedLiteralText("}", node.text, "`");
-                    case 8:
-                        return node.text;
-                }
-                ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
-            }
-            function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) {
-                return leftQuote + ts.escapeNonAsciiCharacters(ts.escapeString(text)) + rightQuote;
-            }
-            function emitDownlevelRawTemplateLiteral(node) {
-                var text = ts.getTextOfNodeFromSourceText(currentText, node);
-                var isLast = node.kind === 11 || node.kind === 14;
-                text = text.substring(1, text.length - (isLast ? 1 : 2));
-                text = text.replace(/\r\n?/g, "\n");
-                text = ts.escapeString(text);
-                write("\"" + text + "\"");
-            }
-            function emitDownlevelTaggedTemplateArray(node, literalEmitter) {
-                write("[");
-                if (node.template.kind === 11) {
-                    literalEmitter(node.template);
-                }
-                else {
-                    literalEmitter(node.template.head);
-                    ts.forEach(node.template.templateSpans, function (child) {
-                        write(", ");
-                        literalEmitter(child.literal);
-                    });
-                }
-                write("]");
-            }
-            function emitDownlevelTaggedTemplate(node) {
-                var tempVariable = createAndRecordTempVariable(0);
-                write("(");
-                emit(tempVariable);
-                write(" = ");
-                emitDownlevelTaggedTemplateArray(node, emit);
-                write(", ");
-                emit(tempVariable);
-                write(".raw = ");
-                emitDownlevelTaggedTemplateArray(node, emitDownlevelRawTemplateLiteral);
-                write(", ");
-                emitParenthesizedIf(node.tag, needsParenthesisForPropertyAccessOrInvocation(node.tag));
-                write("(");
-                emit(tempVariable);
-                if (node.template.kind === 189) {
-                    ts.forEach(node.template.templateSpans, function (templateSpan) {
-                        write(", ");
-                        var needsParens = templateSpan.expression.kind === 187
-                            && templateSpan.expression.operatorToken.kind === 24;
-                        emitParenthesizedIf(templateSpan.expression, needsParens);
-                    });
-                }
-                write("))");
-            }
-            function emitTemplateExpression(node) {
-                if (languageVersion >= 2) {
-                    ts.forEachChild(node, emit);
-                    return;
-                }
-                var emitOuterParens = ts.isExpression(node.parent)
-                    && templateNeedsParens(node, node.parent);
-                if (emitOuterParens) {
-                    write("(");
-                }
-                var headEmitted = false;
-                if (shouldEmitTemplateHead()) {
-                    emitLiteral(node.head);
-                    headEmitted = true;
-                }
-                for (var i = 0, n = node.templateSpans.length; i < n; i++) {
-                    var templateSpan = node.templateSpans[i];
-                    var needsParens = templateSpan.expression.kind !== 178
-                        && comparePrecedenceToBinaryPlus(templateSpan.expression) !== 1;
-                    if (i > 0 || headEmitted) {
-                        write(" + ");
-                    }
-                    emitParenthesizedIf(templateSpan.expression, needsParens);
-                    if (templateSpan.literal.text.length !== 0) {
-                        write(" + ");
-                        emitLiteral(templateSpan.literal);
-                    }
-                }
-                if (emitOuterParens) {
-                    write(")");
-                }
-                function shouldEmitTemplateHead() {
-                    ts.Debug.assert(node.templateSpans.length !== 0);
-                    return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0;
-                }
-                function templateNeedsParens(template, parent) {
-                    switch (parent.kind) {
-                        case 174:
-                        case 175:
-                            return parent.expression === template;
-                        case 176:
-                        case 178:
-                            return false;
-                        default:
-                            return comparePrecedenceToBinaryPlus(parent) !== -1;
-                    }
-                }
-                function comparePrecedenceToBinaryPlus(expression) {
-                    switch (expression.kind) {
-                        case 187:
-                            switch (expression.operatorToken.kind) {
-                                case 37:
-                                case 39:
-                                case 40:
-                                    return 1;
-                                case 35:
-                                case 36:
-                                    return 0;
-                                default:
-                                    return -1;
-                            }
-                        case 190:
-                        case 188:
-                            return -1;
-                        default:
-                            return 1;
-                    }
-                }
-            }
-            function emitTemplateSpan(span) {
-                emit(span.expression);
-                emit(span.literal);
-            }
-            function jsxEmitReact(node) {
-                function emitTagName(name) {
-                    if (name.kind === 69 && ts.isIntrinsicJsxName(name.text)) {
-                        write('"');
-                        emit(name);
-                        write('"');
-                    }
-                    else {
-                        emit(name);
-                    }
-                }
-                function emitAttributeName(name) {
-                    if (/^[A-Za-z_]\w*$/.test(name.text)) {
-                        emit(name);
-                    }
-                    else {
-                        write('"');
-                        emit(name);
-                        write('"');
-                    }
-                }
-                function emitJsxAttribute(node) {
-                    emitAttributeName(node.name);
-                    write(": ");
-                    if (node.initializer) {
-                        emit(node.initializer);
-                    }
-                    else {
-                        write("true");
-                    }
-                }
-                function emitJsxElement(openingNode, children) {
-                    var syntheticReactRef = ts.createSynthesizedNode(69);
-                    syntheticReactRef.text = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
-                    syntheticReactRef.parent = openingNode;
-                    emitLeadingComments(openingNode);
-                    emitExpressionIdentifier(syntheticReactRef);
-                    write(".createElement(");
-                    emitTagName(openingNode.tagName);
-                    write(", ");
-                    if (openingNode.attributes.length === 0) {
-                        write("null");
-                    }
-                    else {
-                        var attrs = openingNode.attributes;
-                        if (ts.forEach(attrs, function (attr) { return attr.kind === 247; })) {
-                            write("__assign(");
-                            var haveOpenedObjectLiteral = false;
-                            for (var i = 0; i < attrs.length; i++) {
-                                if (attrs[i].kind === 247) {
-                                    if (i === 0) {
-                                        write("{}, ");
-                                    }
-                                    if (haveOpenedObjectLiteral) {
-                                        write("}");
-                                        haveOpenedObjectLiteral = false;
-                                    }
-                                    if (i > 0) {
-                                        write(", ");
-                                    }
-                                    emit(attrs[i].expression);
-                                }
-                                else {
-                                    ts.Debug.assert(attrs[i].kind === 246);
-                                    if (haveOpenedObjectLiteral) {
-                                        write(", ");
-                                    }
-                                    else {
-                                        haveOpenedObjectLiteral = true;
-                                        if (i > 0) {
-                                            write(", ");
-                                        }
-                                        write("{");
-                                    }
-                                    emitJsxAttribute(attrs[i]);
-                                }
-                            }
-                            if (haveOpenedObjectLiteral)
-                                write("}");
-                            write(")");
-                        }
-                        else {
-                            write("{");
-                            for (var i = 0, n = attrs.length; i < n; i++) {
-                                if (i > 0) {
-                                    write(", ");
-                                }
-                                emitJsxAttribute(attrs[i]);
-                            }
-                            write("}");
-                        }
-                    }
-                    if (children) {
-                        var firstChild = void 0;
-                        var multipleEmittableChildren = false;
-                        for (var i = 0, n = children.length; i < n; i++) {
-                            var jsxChild = children[i];
-                            if (isJsxChildEmittable(jsxChild)) {
-                                if (!firstChild) {
-                                    write(", ");
-                                    firstChild = jsxChild;
-                                }
-                                else {
-                                    if (!multipleEmittableChildren) {
-                                        multipleEmittableChildren = true;
-                                        increaseIndent();
-                                        writeLine();
-                                        emit(firstChild);
-                                    }
-                                    write(", ");
-                                    writeLine();
-                                    emit(jsxChild);
-                                }
-                            }
-                        }
-                        if (multipleEmittableChildren) {
-                            decreaseIndent();
-                        }
-                        else if (firstChild) {
-                            if (firstChild.kind !== 241 && firstChild.kind !== 242) {
-                                emit(firstChild);
-                            }
-                            else {
-                                increaseIndent();
-                                writeLine();
-                                emit(firstChild);
-                                writeLine();
-                                decreaseIndent();
-                            }
-                        }
-                    }
-                    write(")");
-                    emitTrailingComments(openingNode);
-                }
-                if (node.kind === 241) {
-                    emitJsxElement(node.openingElement, node.children);
-                }
-                else {
-                    ts.Debug.assert(node.kind === 242);
-                    emitJsxElement(node);
-                }
-            }
-            function jsxEmitPreserve(node) {
-                function emitJsxAttribute(node) {
-                    emit(node.name);
-                    if (node.initializer) {
-                        write("=");
-                        emit(node.initializer);
-                    }
-                }
-                function emitJsxSpreadAttribute(node) {
-                    write("{...");
-                    emit(node.expression);
-                    write("}");
-                }
-                function emitAttributes(attribs) {
-                    for (var i = 0, n = attribs.length; i < n; i++) {
-                        if (i > 0) {
-                            write(" ");
-                        }
-                        if (attribs[i].kind === 247) {
-                            emitJsxSpreadAttribute(attribs[i]);
-                        }
-                        else {
-                            ts.Debug.assert(attribs[i].kind === 246);
-                            emitJsxAttribute(attribs[i]);
-                        }
-                    }
-                }
-                function emitJsxOpeningOrSelfClosingElement(node) {
-                    write("<");
-                    emit(node.tagName);
-                    if (node.attributes.length > 0 || (node.kind === 242)) {
-                        write(" ");
-                    }
-                    emitAttributes(node.attributes);
-                    if (node.kind === 242) {
-                        write("/>");
-                    }
-                    else {
-                        write(">");
-                    }
-                }
-                function emitJsxClosingElement(node) {
-                    write("</");
-                    emit(node.tagName);
-                    write(">");
-                }
-                function emitJsxElement(node) {
-                    emitJsxOpeningOrSelfClosingElement(node.openingElement);
-                    for (var i = 0, n = node.children.length; i < n; i++) {
-                        emit(node.children[i]);
-                    }
-                    emitJsxClosingElement(node.closingElement);
-                }
-                if (node.kind === 241) {
-                    emitJsxElement(node);
-                }
-                else {
-                    ts.Debug.assert(node.kind === 242);
-                    emitJsxOpeningOrSelfClosingElement(node);
-                }
-            }
-            function emitExpressionForPropertyName(node) {
-                ts.Debug.assert(node.kind !== 169);
-                if (node.kind === 9) {
-                    emitLiteral(node);
-                }
-                else if (node.kind === 140) {
-                    if (ts.nodeIsDecorated(node.parent)) {
-                        if (!computedPropertyNamesToGeneratedNames) {
-                            computedPropertyNamesToGeneratedNames = [];
-                        }
-                        var generatedName = computedPropertyNamesToGeneratedNames[ts.getNodeId(node)];
-                        if (generatedName) {
-                            write(generatedName);
-                            return;
-                        }
-                        generatedName = createAndRecordTempVariable(0).text;
-                        computedPropertyNamesToGeneratedNames[ts.getNodeId(node)] = generatedName;
-                        write(generatedName);
-                        write(" = ");
-                    }
-                    emit(node.expression);
-                }
-                else {
-                    write('"');
-                    if (node.kind === 8) {
-                        write(node.text);
-                    }
-                    else {
-                        writeTextOfNode(currentText, node);
-                    }
-                    write('"');
-                }
-            }
-            function isExpressionIdentifier(node) {
-                var parent = node.parent;
-                switch (parent.kind) {
-                    case 170:
-                    case 195:
-                    case 184:
-                    case 187:
-                    case 174:
-                    case 249:
-                    case 140:
-                    case 188:
-                    case 143:
-                    case 181:
-                    case 204:
-                    case 173:
-                    case 235:
-                    case 202:
-                    case 194:
-                    case 206:
-                    case 207:
-                    case 208:
-                    case 203:
-                    case 245:
-                    case 242:
-                    case 243:
-                    case 247:
-                    case 248:
-                    case 175:
-                    case 196:
-                    case 178:
-                    case 186:
-                    case 185:
-                    case 211:
-                    case 254:
-                    case 191:
-                    case 213:
-                    case 176:
-                    case 197:
-                    case 215:
-                    case 177:
-                    case 182:
-                    case 183:
-                    case 205:
-                    case 212:
-                    case 190:
-                        return true;
-                    case 169:
-                    case 255:
-                    case 142:
-                    case 253:
-                    case 145:
-                    case 218:
-                        return parent.initializer === node;
-                    case 172:
-                        return parent.expression === node;
-                    case 180:
-                    case 179:
-                        return parent.body === node;
-                    case 229:
-                        return parent.moduleReference === node;
-                    case 139:
-                        return parent.left === node;
-                }
-                return false;
-            }
-            function emitExpressionIdentifier(node) {
-                var container = resolver.getReferencedExportContainer(node);
-                if (container) {
-                    if (container.kind === 256) {
-                        if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
-                            write("exports.");
-                        }
-                    }
-                    else {
-                        write(getGeneratedNameForNode(container));
-                        write(".");
-                    }
-                }
-                else {
-                    if (modulekind !== ts.ModuleKind.ES6) {
-                        var declaration = resolver.getReferencedImportDeclaration(node);
-                        if (declaration) {
-                            if (declaration.kind === 231) {
-                                write(getGeneratedNameForNode(declaration.parent));
-                                write(languageVersion === 0 ? '["default"]' : ".default");
-                                return;
-                            }
-                            else if (declaration.kind === 234) {
-                                write(getGeneratedNameForNode(declaration.parent.parent.parent));
-                                var name_25 = declaration.propertyName || declaration.name;
-                                var identifier = ts.getTextOfNodeFromSourceText(currentText, name_25);
-                                if (languageVersion === 0 && identifier === "default") {
-                                    write('["default"]');
-                                }
-                                else {
-                                    write(".");
-                                    write(identifier);
-                                }
-                                return;
-                            }
-                        }
-                    }
-                    if (languageVersion < 2) {
-                        var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
-                        if (declaration) {
-                            write(getGeneratedNameForNode(declaration.name));
-                            return;
-                        }
-                    }
-                    else if (resolver.getNodeCheckFlags(node) & 1048576) {
-                        var declaration = resolver.getReferencedValueDeclaration(node);
-                        if (declaration) {
-                            var classAlias = decoratedClassAliases[ts.getNodeId(declaration)];
-                            if (classAlias !== undefined) {
-                                write(classAlias);
-                                return;
-                            }
-                        }
-                    }
-                }
-                if (ts.nodeIsSynthesized(node)) {
-                    write(node.text);
-                }
-                else {
-                    writeTextOfNode(currentText, node);
-                }
-            }
-            function isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node) {
-                if (languageVersion < 2) {
-                    var parent_13 = node.parent;
-                    switch (parent_13.kind) {
-                        case 169:
-                        case 221:
-                        case 224:
-                        case 218:
-                            return parent_13.name === node && resolver.isDeclarationWithCollidingName(parent_13);
-                    }
-                }
-                return false;
-            }
-            function emitIdentifier(node) {
-                if (convertedLoopState) {
-                    if (node.text == "arguments" && resolver.isArgumentsLocalBinding(node)) {
-                        var name_26 = convertedLoopState.argumentsName || (convertedLoopState.argumentsName = makeUniqueName("arguments"));
-                        write(name_26);
-                        return;
-                    }
-                }
-                if (!node.parent) {
-                    write(node.text);
-                }
-                else if (isExpressionIdentifier(node)) {
-                    emitExpressionIdentifier(node);
-                }
-                else if (isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node)) {
-                    write(getGeneratedNameForNode(node));
-                }
-                else if (ts.nodeIsSynthesized(node)) {
-                    write(node.text);
-                }
-                else {
-                    writeTextOfNode(currentText, node);
-                }
-            }
-            function emitThis(node) {
-                if (resolver.getNodeCheckFlags(node) & 2) {
-                    write("_this");
-                }
-                else if (convertedLoopState) {
-                    write(convertedLoopState.thisName || (convertedLoopState.thisName = makeUniqueName("this")));
-                }
-                else {
-                    write("this");
-                }
-            }
-            function emitSuper(node) {
-                if (languageVersion >= 2) {
-                    write("super");
-                }
-                else {
-                    var flags = resolver.getNodeCheckFlags(node);
-                    if (flags & 256) {
-                        write("_super.prototype");
-                    }
-                    else {
-                        write("_super");
-                    }
-                }
-            }
-            function emitObjectBindingPattern(node) {
-                write("{ ");
-                var elements = node.elements;
-                emitList(elements, 0, elements.length, false, elements.hasTrailingComma);
-                write(" }");
-            }
-            function emitArrayBindingPattern(node) {
-                write("[");
-                var elements = node.elements;
-                emitList(elements, 0, elements.length, false, elements.hasTrailingComma);
-                write("]");
-            }
-            function emitBindingElement(node) {
-                if (node.propertyName) {
-                    emit(node.propertyName);
-                    write(": ");
-                }
-                if (node.dotDotDotToken) {
-                    write("...");
-                }
-                if (ts.isBindingPattern(node.name)) {
-                    emit(node.name);
-                }
-                else {
-                    emitModuleMemberName(node);
-                }
-                emitOptional(" = ", node.initializer);
-            }
-            function emitSpreadElementExpression(node) {
-                write("...");
-                emit(node.expression);
-            }
-            function emitYieldExpression(node) {
-                write(ts.tokenToString(114));
-                if (node.asteriskToken) {
-                    write("*");
-                }
-                if (node.expression) {
-                    write(" ");
-                    emit(node.expression);
-                }
-            }
-            function emitAwaitExpression(node) {
-                var needsParenthesis = needsParenthesisForAwaitExpressionAsYield(node);
-                if (needsParenthesis) {
-                    write("(");
-                }
-                write(ts.tokenToString(114));
-                write(" ");
-                emit(node.expression);
-                if (needsParenthesis) {
-                    write(")");
-                }
-            }
-            function needsParenthesisForAwaitExpressionAsYield(node) {
-                if (node.parent.kind === 187 && !ts.isAssignmentOperator(node.parent.operatorToken.kind)) {
-                    return true;
-                }
-                else if (node.parent.kind === 188 && node.parent.condition === node) {
-                    return true;
-                }
-                return false;
-            }
-            function needsParenthesisForPropertyAccessOrInvocation(node) {
-                switch (node.kind) {
-                    case 69:
-                    case 170:
-                    case 172:
-                    case 173:
-                    case 174:
-                    case 178:
-                        return false;
-                }
-                return true;
-            }
-            function emitListWithSpread(elements, needsUniqueCopy, multiLine, trailingComma, useConcat) {
-                var pos = 0;
-                var group = 0;
-                var length = elements.length;
-                while (pos < length) {
-                    if (group === 1 && useConcat) {
-                        write(".concat(");
-                    }
-                    else if (group > 0) {
-                        write(", ");
-                    }
-                    var e = elements[pos];
-                    if (e.kind === 191) {
-                        e = e.expression;
-                        emitParenthesizedIf(e, group === 0 && needsParenthesisForPropertyAccessOrInvocation(e));
-                        pos++;
-                        if (pos === length && group === 0 && needsUniqueCopy && e.kind !== 170) {
-                            write(".slice()");
-                        }
-                    }
-                    else {
-                        var i = pos;
-                        while (i < length && elements[i].kind !== 191) {
-                            i++;
-                        }
-                        write("[");
-                        if (multiLine) {
-                            increaseIndent();
-                        }
-                        emitList(elements, pos, i - pos, multiLine, trailingComma && i === length);
-                        if (multiLine) {
-                            decreaseIndent();
-                        }
-                        write("]");
-                        pos = i;
-                    }
-                    group++;
-                }
-                if (group > 1) {
-                    if (useConcat) {
-                        write(")");
-                    }
-                }
-            }
-            function isSpreadElementExpression(node) {
-                return node.kind === 191;
-            }
-            function emitArrayLiteral(node) {
-                var elements = node.elements;
-                if (elements.length === 0) {
-                    write("[]");
-                }
-                else if (languageVersion >= 2 || !ts.forEach(elements, isSpreadElementExpression)) {
-                    write("[");
-                    emitLinePreservingList(node, node.elements, elements.hasTrailingComma, false);
-                    write("]");
-                }
-                else {
-                    emitListWithSpread(elements, true, node.multiLine, elements.hasTrailingComma, true);
-                }
-            }
-            function emitObjectLiteralBody(node, numElements) {
-                if (numElements === 0) {
-                    write("{}");
-                    return;
-                }
-                write("{");
-                if (numElements > 0) {
-                    var properties = node.properties;
-                    if (numElements === properties.length) {
-                        emitLinePreservingList(node, properties, languageVersion >= 1, true);
-                    }
-                    else {
-                        var multiLine = node.multiLine;
-                        if (!multiLine) {
-                            write(" ");
-                        }
-                        else {
-                            increaseIndent();
-                        }
-                        emitList(properties, 0, numElements, multiLine, false);
-                        if (!multiLine) {
-                            write(" ");
-                        }
-                        else {
-                            decreaseIndent();
-                        }
-                    }
-                }
-                write("}");
-            }
-            function emitDownlevelObjectLiteralWithComputedProperties(node, firstComputedPropertyIndex) {
-                var multiLine = node.multiLine;
-                var properties = node.properties;
-                write("(");
-                if (multiLine) {
-                    increaseIndent();
-                }
-                var tempVar = createAndRecordTempVariable(0);
-                emit(tempVar);
-                write(" = ");
-                emitObjectLiteralBody(node, firstComputedPropertyIndex);
-                for (var i = firstComputedPropertyIndex, n = properties.length; i < n; i++) {
-                    writeComma();
-                    var property = properties[i];
-                    emitStart(property);
-                    if (property.kind === 149 || property.kind === 150) {
-                        var accessors = ts.getAllAccessorDeclarations(node.properties, property);
-                        if (property !== accessors.firstAccessor) {
-                            continue;
-                        }
-                        write("Object.defineProperty(");
-                        emit(tempVar);
-                        write(", ");
-                        emitStart(property.name);
-                        emitExpressionForPropertyName(property.name);
-                        emitEnd(property.name);
-                        write(", {");
-                        increaseIndent();
-                        if (accessors.getAccessor) {
-                            writeLine();
-                            emitLeadingComments(accessors.getAccessor);
-                            write("get: ");
-                            emitStart(accessors.getAccessor);
-                            write("function ");
-                            emitSignatureAndBody(accessors.getAccessor);
-                            emitEnd(accessors.getAccessor);
-                            emitTrailingComments(accessors.getAccessor);
-                            write(",");
-                        }
-                        if (accessors.setAccessor) {
-                            writeLine();
-                            emitLeadingComments(accessors.setAccessor);
-                            write("set: ");
-                            emitStart(accessors.setAccessor);
-                            write("function ");
-                            emitSignatureAndBody(accessors.setAccessor);
-                            emitEnd(accessors.setAccessor);
-                            emitTrailingComments(accessors.setAccessor);
-                            write(",");
-                        }
-                        writeLine();
-                        write("enumerable: true,");
-                        writeLine();
-                        write("configurable: true");
-                        decreaseIndent();
-                        writeLine();
-                        write("})");
-                        emitEnd(property);
-                    }
-                    else {
-                        emitLeadingComments(property);
-                        emitStart(property.name);
-                        emit(tempVar);
-                        emitMemberAccessForPropertyName(property.name);
-                        emitEnd(property.name);
-                        write(" = ");
-                        if (property.kind === 253) {
-                            emit(property.initializer);
-                        }
-                        else if (property.kind === 254) {
-                            emitExpressionIdentifier(property.name);
-                        }
-                        else if (property.kind === 147) {
-                            emitFunctionDeclaration(property);
-                        }
-                        else {
-                            ts.Debug.fail("ObjectLiteralElement type not accounted for: " + property.kind);
-                        }
-                    }
-                    emitEnd(property);
-                }
-                writeComma();
-                emit(tempVar);
-                if (multiLine) {
-                    decreaseIndent();
-                    writeLine();
-                }
-                write(")");
-                function writeComma() {
-                    if (multiLine) {
-                        write(",");
-                        writeLine();
-                    }
-                    else {
-                        write(", ");
-                    }
-                }
-            }
-            function emitObjectLiteral(node) {
-                var properties = node.properties;
-                if (languageVersion < 2) {
-                    var numProperties = properties.length;
-                    var numInitialNonComputedProperties = numProperties;
-                    for (var i = 0, n = properties.length; i < n; i++) {
-                        if (properties[i].name.kind === 140) {
-                            numInitialNonComputedProperties = i;
-                            break;
-                        }
-                    }
-                    var hasComputedProperty = numInitialNonComputedProperties !== properties.length;
-                    if (hasComputedProperty) {
-                        emitDownlevelObjectLiteralWithComputedProperties(node, numInitialNonComputedProperties);
-                        return;
-                    }
-                }
-                emitObjectLiteralBody(node, properties.length);
-            }
-            function createBinaryExpression(left, operator, right, startsOnNewLine) {
-                var result = ts.createSynthesizedNode(187, startsOnNewLine);
-                result.operatorToken = ts.createSynthesizedNode(operator);
-                result.left = left;
-                result.right = right;
-                return result;
-            }
-            function createPropertyAccessExpression(expression, name) {
-                var result = ts.createSynthesizedNode(172);
-                result.expression = parenthesizeForAccess(expression);
-                result.dotToken = ts.createSynthesizedNode(21);
-                result.name = name;
-                return result;
-            }
-            function createElementAccessExpression(expression, argumentExpression) {
-                var result = ts.createSynthesizedNode(173);
-                result.expression = parenthesizeForAccess(expression);
-                result.argumentExpression = argumentExpression;
-                return result;
-            }
-            function parenthesizeForAccess(expr) {
-                while (expr.kind === 177 ||
-                    expr.kind === 195 ||
-                    expr.kind === 196) {
-                    expr = expr.expression;
-                }
-                if (ts.isLeftHandSideExpression(expr) &&
-                    expr.kind !== 175 &&
-                    expr.kind !== 8) {
-                    return expr;
-                }
-                var node = ts.createSynthesizedNode(178);
-                node.expression = expr;
-                return node;
-            }
-            function emitComputedPropertyName(node) {
-                write("[");
-                emitExpressionForPropertyName(node);
-                write("]");
-            }
-            function emitMethod(node) {
-                if (languageVersion >= 2 && node.asteriskToken) {
-                    write("*");
-                }
-                emit(node.name);
-                if (languageVersion < 2) {
-                    write(": function ");
-                }
-                emitSignatureAndBody(node);
-            }
-            function emitPropertyAssignment(node) {
-                emit(node.name);
-                write(": ");
-                emitTrailingCommentsOfPosition(node.initializer.pos);
-                emit(node.initializer);
-            }
-            function isNamespaceExportReference(node) {
-                var container = resolver.getReferencedExportContainer(node);
-                return container && container.kind !== 256;
-            }
-            function isImportedReference(node) {
-                var declaration = resolver.getReferencedImportDeclaration(node);
-                return declaration && (declaration.kind === 231 || declaration.kind === 234);
-            }
-            function emitShorthandPropertyAssignment(node) {
-                writeTextOfNode(currentText, node.name);
-                if (languageVersion < 2 || (modulekind !== ts.ModuleKind.ES6 && isImportedReference(node.name)) || isNamespaceExportReference(node.name)) {
-                    write(": ");
-                    emit(node.name);
-                }
-                if (languageVersion >= 2 && node.objectAssignmentInitializer) {
-                    write(" = ");
-                    emit(node.objectAssignmentInitializer);
-                }
-            }
-            function tryEmitConstantValue(node) {
-                var constantValue = tryGetConstEnumValue(node);
-                if (constantValue !== undefined) {
-                    write(constantValue.toString());
-                    if (!compilerOptions.removeComments) {
-                        var propertyName = node.kind === 172 ? ts.declarationNameToString(node.name) : ts.getTextOfNode(node.argumentExpression);
-                        write(" /* " + propertyName + " */");
-                    }
-                    return true;
-                }
-                return false;
-            }
-            function tryGetConstEnumValue(node) {
-                if (compilerOptions.isolatedModules) {
-                    return undefined;
-                }
-                return node.kind === 172 || node.kind === 173
-                    ? resolver.getConstantValue(node)
-                    : undefined;
-            }
-            function indentIfOnDifferentLines(parent, node1, node2, valueToWriteWhenNotIndenting) {
-                var realNodesAreOnDifferentLines = !ts.nodeIsSynthesized(parent) && !nodeEndIsOnSameLineAsNodeStart(node1, node2);
-                var synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2);
-                if (realNodesAreOnDifferentLines || synthesizedNodeIsOnDifferentLine) {
-                    increaseIndent();
-                    writeLine();
-                    return true;
-                }
-                else {
-                    if (valueToWriteWhenNotIndenting) {
-                        write(valueToWriteWhenNotIndenting);
-                    }
-                    return false;
-                }
-            }
-            function emitPropertyAccess(node) {
-                if (tryEmitConstantValue(node)) {
-                    return;
-                }
-                if (languageVersion === 2 &&
-                    node.expression.kind === 95 &&
-                    isInAsyncMethodWithSuperInES6(node)) {
-                    var name_27 = ts.createSynthesizedNode(9);
-                    name_27.text = node.name.text;
-                    emitSuperAccessInAsyncMethod(node.expression, name_27);
-                    return;
-                }
-                emit(node.expression);
-                var indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, node.dotToken);
-                var shouldEmitSpace = false;
-                if (!indentedBeforeDot) {
-                    if (node.expression.kind === 8) {
-                        var text = ts.getTextOfNodeFromSourceText(currentText, node.expression);
-                        shouldEmitSpace = text.indexOf(ts.tokenToString(21)) < 0;
-                    }
-                    else {
-                        var constantValue = tryGetConstEnumValue(node.expression);
-                        shouldEmitSpace = isFinite(constantValue) && Math.floor(constantValue) === constantValue;
-                    }
-                }
-                if (shouldEmitSpace) {
-                    write(" .");
-                }
-                else {
-                    write(".");
-                }
-                var indentedAfterDot = indentIfOnDifferentLines(node, node.dotToken, node.name);
-                emit(node.name);
-                decreaseIndentIf(indentedBeforeDot, indentedAfterDot);
-            }
-            function emitQualifiedName(node) {
-                emit(node.left);
-                write(".");
-                emit(node.right);
-            }
-            function emitQualifiedNameAsExpression(node, useFallback) {
-                if (node.left.kind === 69) {
-                    emitEntityNameAsExpression(node.left, useFallback);
-                }
-                else if (useFallback) {
-                    var temp = createAndRecordTempVariable(0);
-                    write("(");
-                    emitNodeWithoutSourceMap(temp);
-                    write(" = ");
-                    emitEntityNameAsExpression(node.left, true);
-                    write(") && ");
-                    emitNodeWithoutSourceMap(temp);
-                }
-                else {
-                    emitEntityNameAsExpression(node.left, false);
-                }
-                write(".");
-                emit(node.right);
-            }
-            function emitEntityNameAsExpression(node, useFallback) {
-                switch (node.kind) {
-                    case 69:
-                        if (useFallback) {
-                            write("typeof ");
-                            emitExpressionIdentifier(node);
-                            write(" !== 'undefined' && ");
-                        }
-                        emitExpressionIdentifier(node);
-                        break;
-                    case 139:
-                        emitQualifiedNameAsExpression(node, useFallback);
-                        break;
-                    default:
-                        emitNodeWithoutSourceMap(node);
-                        break;
-                }
-            }
-            function emitIndexedAccess(node) {
-                if (tryEmitConstantValue(node)) {
-                    return;
-                }
-                if (languageVersion === 2 &&
-                    node.expression.kind === 95 &&
-                    isInAsyncMethodWithSuperInES6(node)) {
-                    emitSuperAccessInAsyncMethod(node.expression, node.argumentExpression);
-                    return;
-                }
-                emit(node.expression);
-                write("[");
-                emit(node.argumentExpression);
-                write("]");
-            }
-            function hasSpreadElement(elements) {
-                return ts.forEach(elements, function (e) { return e.kind === 191; });
-            }
-            function skipParentheses(node) {
-                while (node.kind === 178 ||
-                    node.kind === 177 ||
-                    node.kind === 195 ||
-                    node.kind === 196) {
-                    node = node.expression;
-                }
-                return node;
-            }
-            function emitCallTarget(node) {
-                if (node.kind === 69 || node.kind === 97 || node.kind === 95) {
-                    emit(node);
-                    return node;
-                }
-                var temp = createAndRecordTempVariable(0);
-                write("(");
-                emit(temp);
-                write(" = ");
-                emit(node);
-                write(")");
-                return temp;
-            }
-            function emitCallWithSpread(node) {
-                var target;
-                var expr = skipParentheses(node.expression);
-                if (expr.kind === 172) {
-                    target = emitCallTarget(expr.expression);
-                    write(".");
-                    emit(expr.name);
-                }
-                else if (expr.kind === 173) {
-                    target = emitCallTarget(expr.expression);
-                    write("[");
-                    emit(expr.argumentExpression);
-                    write("]");
-                }
-                else if (expr.kind === 95) {
-                    target = expr;
-                    write("_super");
-                }
-                else {
-                    emit(node.expression);
-                }
-                write(".apply(");
-                if (target) {
-                    if (target.kind === 95) {
-                        emitThis(target);
-                    }
-                    else {
-                        emit(target);
-                    }
-                }
-                else {
-                    write("void 0");
-                }
-                write(", ");
-                emitListWithSpread(node.arguments, false, false, false, true);
-                write(")");
-            }
-            function isInAsyncMethodWithSuperInES6(node) {
-                if (languageVersion === 2) {
-                    var container = ts.getSuperContainer(node, false);
-                    if (container && resolver.getNodeCheckFlags(container) & (2048 | 4096)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function emitSuperAccessInAsyncMethod(superNode, argumentExpression) {
-                var container = ts.getSuperContainer(superNode, false);
-                var isSuperBinding = resolver.getNodeCheckFlags(container) & 4096;
-                write("_super(");
-                emit(argumentExpression);
-                write(isSuperBinding ? ").value" : ")");
-            }
-            function emitCallExpression(node) {
-                if (languageVersion < 2 && hasSpreadElement(node.arguments)) {
-                    emitCallWithSpread(node);
-                    return;
-                }
-                var expression = node.expression;
-                var superCall = false;
-                var isAsyncMethodWithSuper = false;
-                if (expression.kind === 95) {
-                    emitSuper(expression);
-                    superCall = true;
-                }
-                else {
-                    superCall = ts.isSuperPropertyOrElementAccess(expression);
-                    isAsyncMethodWithSuper = superCall && isInAsyncMethodWithSuperInES6(node);
-                    emit(expression);
-                }
-                if (superCall && (languageVersion < 2 || isAsyncMethodWithSuper)) {
-                    write(".call(");
-                    emitThis(expression);
-                    if (node.arguments.length) {
-                        write(", ");
-                        emitCommaList(node.arguments);
-                    }
-                    write(")");
-                }
-                else {
-                    write("(");
-                    emitCommaList(node.arguments);
-                    write(")");
-                }
-            }
-            function emitNewExpression(node) {
-                write("new ");
-                if (languageVersion === 1 &&
-                    node.arguments &&
-                    hasSpreadElement(node.arguments)) {
-                    write("(");
-                    var target = emitCallTarget(node.expression);
-                    write(".bind.apply(");
-                    emit(target);
-                    write(", [void 0].concat(");
-                    emitListWithSpread(node.arguments, false, false, false, false);
-                    write(")))");
-                    write("()");
-                }
-                else {
-                    emit(node.expression);
-                    if (node.arguments) {
-                        write("(");
-                        emitCommaList(node.arguments);
-                        write(")");
-                    }
-                }
-            }
-            function emitTaggedTemplateExpression(node) {
-                if (languageVersion >= 2) {
-                    emit(node.tag);
-                    write(" ");
-                    emit(node.template);
-                }
-                else {
-                    emitDownlevelTaggedTemplate(node);
-                }
-            }
-            function emitParenExpression(node) {
-                if (!ts.nodeIsSynthesized(node) && node.parent.kind !== 180) {
-                    if (node.expression.kind === 177 ||
-                        node.expression.kind === 195 ||
-                        node.expression.kind === 196) {
-                        var operand = node.expression.expression;
-                        while (operand.kind === 177 ||
-                            operand.kind === 195 ||
-                            operand.kind === 196) {
-                            operand = operand.expression;
-                        }
-                        if (operand.kind !== 185 &&
-                            operand.kind !== 183 &&
-                            operand.kind !== 182 &&
-                            operand.kind !== 181 &&
-                            operand.kind !== 186 &&
-                            operand.kind !== 175 &&
-                            !(operand.kind === 174 && node.parent.kind === 175) &&
-                            !(operand.kind === 179 && node.parent.kind === 174) &&
-                            !(operand.kind === 8 && node.parent.kind === 172)) {
-                            emit(operand);
-                            return;
-                        }
-                    }
-                }
-                write("(");
-                emit(node.expression);
-                write(")");
-            }
-            function emitDeleteExpression(node) {
-                write(ts.tokenToString(78));
-                write(" ");
-                emit(node.expression);
-            }
-            function emitVoidExpression(node) {
-                write(ts.tokenToString(103));
-                write(" ");
-                emit(node.expression);
-            }
-            function emitTypeOfExpression(node) {
-                write(ts.tokenToString(101));
-                write(" ");
-                emit(node.expression);
-            }
-            function isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node) {
-                if (!isCurrentFileSystemExternalModule() || node.kind !== 69 || ts.nodeIsSynthesized(node)) {
-                    return false;
-                }
-                var isVariableDeclarationOrBindingElement = node.parent && (node.parent.kind === 218 || node.parent.kind === 169);
-                var targetDeclaration = isVariableDeclarationOrBindingElement
-                    ? node.parent
-                    : resolver.getReferencedValueDeclaration(node);
-                return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, true);
-            }
-            function emitPrefixUnaryExpression(node) {
-                var exportChanged = (node.operator === 41 || node.operator === 42) &&
-                    isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
-                if (exportChanged) {
-                    write(exportFunctionForFile + "(\"");
-                    emitNodeWithoutSourceMap(node.operand);
-                    write("\", ");
-                }
-                write(ts.tokenToString(node.operator));
-                if (node.operand.kind === 185) {
-                    var operand = node.operand;
-                    if (node.operator === 35 && (operand.operator === 35 || operand.operator === 41)) {
-                        write(" ");
-                    }
-                    else if (node.operator === 36 && (operand.operator === 36 || operand.operator === 42)) {
-                        write(" ");
-                    }
-                }
-                emit(node.operand);
-                if (exportChanged) {
-                    write(")");
-                }
-            }
-            function emitPostfixUnaryExpression(node) {
-                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
-                if (exportChanged) {
-                    write("(" + exportFunctionForFile + "(\"");
-                    emitNodeWithoutSourceMap(node.operand);
-                    write("\", ");
-                    write(ts.tokenToString(node.operator));
-                    emit(node.operand);
-                    if (node.operator === 41) {
-                        write(") - 1)");
-                    }
-                    else {
-                        write(") + 1)");
-                    }
-                }
-                else {
-                    emit(node.operand);
-                    write(ts.tokenToString(node.operator));
-                }
-            }
-            function shouldHoistDeclarationInSystemJsModule(node) {
-                return isSourceFileLevelDeclarationInSystemJsModule(node, false);
-            }
-            function isSourceFileLevelDeclarationInSystemJsModule(node, isExported) {
-                if (!node || !isCurrentFileSystemExternalModule()) {
-                    return false;
-                }
-                var current = ts.getRootDeclaration(node).parent;
-                while (current) {
-                    if (current.kind === 256) {
-                        return !isExported || ((ts.getCombinedNodeFlags(node) & 1) !== 0);
-                    }
-                    else if (ts.isDeclaration(current)) {
-                        return false;
-                    }
-                    else {
-                        current = current.parent;
-                    }
-                }
-            }
-            function emitExponentiationOperator(node) {
-                var leftHandSideExpression = node.left;
-                if (node.operatorToken.kind === 60) {
-                    var synthesizedLHS = void 0;
-                    var shouldEmitParentheses = false;
-                    if (ts.isElementAccessExpression(leftHandSideExpression)) {
-                        shouldEmitParentheses = true;
-                        write("(");
-                        synthesizedLHS = ts.createSynthesizedNode(173, false);
-                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, false, false);
-                        synthesizedLHS.expression = identifier;
-                        if (leftHandSideExpression.argumentExpression.kind !== 8 &&
-                            leftHandSideExpression.argumentExpression.kind !== 9) {
-                            var tempArgumentExpression = createAndRecordTempVariable(268435456);
-                            synthesizedLHS.argumentExpression = tempArgumentExpression;
-                            emitAssignment(tempArgumentExpression, leftHandSideExpression.argumentExpression, true, leftHandSideExpression.expression);
-                        }
-                        else {
-                            synthesizedLHS.argumentExpression = leftHandSideExpression.argumentExpression;
-                        }
-                        write(", ");
-                    }
-                    else if (ts.isPropertyAccessExpression(leftHandSideExpression)) {
-                        shouldEmitParentheses = true;
-                        write("(");
-                        synthesizedLHS = ts.createSynthesizedNode(172, false);
-                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, false, false);
-                        synthesizedLHS.expression = identifier;
-                        synthesizedLHS.dotToken = leftHandSideExpression.dotToken;
-                        synthesizedLHS.name = leftHandSideExpression.name;
-                        write(", ");
-                    }
-                    emit(synthesizedLHS || leftHandSideExpression);
-                    write(" = ");
-                    write("Math.pow(");
-                    emit(synthesizedLHS || leftHandSideExpression);
-                    write(", ");
-                    emit(node.right);
-                    write(")");
-                    if (shouldEmitParentheses) {
-                        write(")");
-                    }
-                }
-                else {
-                    write("Math.pow(");
-                    emit(leftHandSideExpression);
-                    write(", ");
-                    emit(node.right);
-                    write(")");
-                }
-            }
-            function emitBinaryExpression(node) {
-                if (languageVersion < 2 && node.operatorToken.kind === 56 &&
-                    (node.left.kind === 171 || node.left.kind === 170)) {
-                    emitDestructuring(node, node.parent.kind === 202);
-                }
-                else {
-                    var exportChanged = node.operatorToken.kind >= 56 &&
-                        node.operatorToken.kind <= 68 &&
-                        isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left);
-                    if (exportChanged) {
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithoutSourceMap(node.left);
-                        write("\", ");
-                    }
-                    if (node.operatorToken.kind === 38 || node.operatorToken.kind === 60) {
-                        emitExponentiationOperator(node);
-                    }
-                    else {
-                        emit(node.left);
-                        var indentedBeforeOperator = indentIfOnDifferentLines(node, node.left, node.operatorToken, node.operatorToken.kind !== 24 ? " " : undefined);
-                        write(ts.tokenToString(node.operatorToken.kind));
-                        var indentedAfterOperator = indentIfOnDifferentLines(node, node.operatorToken, node.right, " ");
-                        emit(node.right);
-                        decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator);
-                    }
-                    if (exportChanged) {
-                        write(")");
-                    }
-                }
-            }
-            function synthesizedNodeStartsOnNewLine(node) {
-                return ts.nodeIsSynthesized(node) && node.startsOnNewLine;
-            }
-            function emitConditionalExpression(node) {
-                emit(node.condition);
-                var indentedBeforeQuestion = indentIfOnDifferentLines(node, node.condition, node.questionToken, " ");
-                write("?");
-                var indentedAfterQuestion = indentIfOnDifferentLines(node, node.questionToken, node.whenTrue, " ");
-                emit(node.whenTrue);
-                decreaseIndentIf(indentedBeforeQuestion, indentedAfterQuestion);
-                var indentedBeforeColon = indentIfOnDifferentLines(node, node.whenTrue, node.colonToken, " ");
-                write(":");
-                var indentedAfterColon = indentIfOnDifferentLines(node, node.colonToken, node.whenFalse, " ");
-                emit(node.whenFalse);
-                decreaseIndentIf(indentedBeforeColon, indentedAfterColon);
-            }
-            function decreaseIndentIf(value1, value2) {
-                if (value1) {
-                    decreaseIndent();
-                }
-                if (value2) {
-                    decreaseIndent();
-                }
-            }
-            function isSingleLineEmptyBlock(node) {
-                if (node && node.kind === 199) {
-                    var block = node;
-                    return block.statements.length === 0 && nodeEndIsOnSameLineAsNodeStart(block, block);
-                }
-            }
-            function emitBlock(node) {
-                if (isSingleLineEmptyBlock(node)) {
-                    emitToken(15, node.pos);
-                    write(" ");
-                    emitToken(16, node.statements.end);
-                    return;
-                }
-                emitToken(15, node.pos);
-                increaseIndent();
-                if (node.kind === 226) {
-                    ts.Debug.assert(node.parent.kind === 225);
-                    emitCaptureThisForNodeIfNecessary(node.parent);
-                }
-                emitLines(node.statements);
-                if (node.kind === 226) {
-                    emitTempDeclarations(true);
-                }
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.statements.end);
-            }
-            function emitEmbeddedStatement(node) {
-                if (node.kind === 199) {
-                    write(" ");
-                    emit(node);
-                }
-                else {
-                    increaseIndent();
-                    writeLine();
-                    emit(node);
-                    decreaseIndent();
-                }
-            }
-            function emitExpressionStatement(node) {
-                emitParenthesizedIf(node.expression, node.expression.kind === 180);
-                write(";");
-            }
-            function emitIfStatement(node) {
-                var endPos = emitToken(88, node.pos);
-                write(" ");
-                endPos = emitToken(17, endPos);
-                emit(node.expression);
-                emitToken(18, node.expression.end);
-                emitEmbeddedStatement(node.thenStatement);
-                if (node.elseStatement) {
-                    writeLine();
-                    emitToken(80, node.thenStatement.end);
-                    if (node.elseStatement.kind === 203) {
-                        write(" ");
-                        emit(node.elseStatement);
-                    }
-                    else {
-                        emitEmbeddedStatement(node.elseStatement);
-                    }
-                }
-            }
-            function emitDoStatement(node) {
-                emitLoop(node, emitDoStatementWorker);
-            }
-            function emitDoStatementWorker(node, loop) {
-                write("do");
-                if (loop) {
-                    emitConvertedLoopCall(loop, true);
-                }
-                else {
-                    emitNormalLoopBody(node, true);
-                }
-                if (node.statement.kind === 199) {
-                    write(" ");
-                }
-                else {
-                    writeLine();
-                }
-                write("while (");
-                emit(node.expression);
-                write(");");
-            }
-            function emitWhileStatement(node) {
-                emitLoop(node, emitWhileStatementWorker);
-            }
-            function emitWhileStatementWorker(node, loop) {
-                write("while (");
-                emit(node.expression);
-                write(")");
-                if (loop) {
-                    emitConvertedLoopCall(loop, true);
-                }
-                else {
-                    emitNormalLoopBody(node, true);
-                }
-            }
-            function tryEmitStartOfVariableDeclarationList(decl) {
-                if (shouldHoistVariable(decl, true)) {
-                    return false;
-                }
-                if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072) === 0) {
-                    for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) {
-                        var varDecl = _b[_a];
-                        hoistVariableDeclarationFromLoop(convertedLoopState, varDecl);
-                    }
-                    return false;
-                }
-                emitStart(decl);
-                if (decl && languageVersion >= 2) {
-                    if (ts.isLet(decl)) {
-                        write("let ");
-                    }
-                    else if (ts.isConst(decl)) {
-                        write("const ");
-                    }
-                    else {
-                        write("var ");
-                    }
-                }
-                else {
-                    write("var ");
-                }
-                return true;
-            }
-            function emitVariableDeclarationListSkippingUninitializedEntries(list) {
-                var started = false;
-                for (var _a = 0, _b = list.declarations; _a < _b.length; _a++) {
-                    var decl = _b[_a];
-                    if (!decl.initializer) {
-                        continue;
-                    }
-                    if (!started) {
-                        started = true;
-                    }
-                    else {
-                        write(", ");
-                    }
-                    emit(decl);
-                }
-                return started;
-            }
-            function shouldConvertLoopBody(node) {
-                return languageVersion < 2 &&
-                    (resolver.getNodeCheckFlags(node) & 65536) !== 0;
-            }
-            function emitLoop(node, loopEmitter) {
-                var shouldConvert = shouldConvertLoopBody(node);
-                if (!shouldConvert) {
-                    loopEmitter(node, undefined);
-                }
-                else {
-                    var loop = convertLoopBody(node);
-                    if (node.parent.kind === 214) {
-                        emitLabelAndColon(node.parent);
-                    }
-                    loopEmitter(node, loop);
-                }
-            }
-            function convertLoopBody(node) {
-                var functionName = makeUniqueName("_loop");
-                var loopInitializer;
-                switch (node.kind) {
-                    case 206:
-                    case 207:
-                    case 208:
-                        var initializer = node.initializer;
-                        if (initializer && initializer.kind === 219) {
-                            loopInitializer = node.initializer;
-                        }
-                        break;
-                }
-                var loopParameters;
-                var loopOutParameters;
-                if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3072)) {
-                    loopParameters = [];
-                    for (var _a = 0, _b = loopInitializer.declarations; _a < _b.length; _a++) {
-                        var varDeclaration = _b[_a];
-                        processVariableDeclaration(varDeclaration.name);
-                    }
-                }
-                var bodyIsBlock = node.statement.kind === 199;
-                var paramList = loopParameters ? loopParameters.join(", ") : "";
-                writeLine();
-                write("var " + functionName + " = function(" + paramList + ")");
-                var convertedOuterLoopState = convertedLoopState;
-                convertedLoopState = { loopOutParameters: loopOutParameters };
-                if (convertedOuterLoopState) {
-                    if (convertedOuterLoopState.argumentsName) {
-                        convertedLoopState.argumentsName = convertedOuterLoopState.argumentsName;
-                    }
-                    if (convertedOuterLoopState.thisName) {
-                        convertedLoopState.thisName = convertedOuterLoopState.thisName;
-                    }
-                    if (convertedOuterLoopState.hoistedLocalVariables) {
-                        convertedLoopState.hoistedLocalVariables = convertedOuterLoopState.hoistedLocalVariables;
-                    }
-                }
-                write(" {");
-                writeLine();
-                increaseIndent();
-                if (bodyIsBlock) {
-                    emitLines(node.statement.statements);
-                }
-                else {
-                    emit(node.statement);
-                }
-                writeLine();
-                copyLoopOutParameters(convertedLoopState, 1, true);
-                decreaseIndent();
-                writeLine();
-                write("};");
-                writeLine();
-                if (loopOutParameters) {
-                    write("var ");
-                    for (var i = 0; i < loopOutParameters.length; i++) {
-                        if (i !== 0) {
-                            write(", ");
-                        }
-                        write(loopOutParameters[i].outParamName);
-                    }
-                    write(";");
-                    writeLine();
-                }
-                if (convertedLoopState.argumentsName) {
-                    if (convertedOuterLoopState) {
-                        convertedOuterLoopState.argumentsName = convertedLoopState.argumentsName;
-                    }
-                    else {
-                        write("var " + convertedLoopState.argumentsName + " = arguments;");
-                        writeLine();
-                    }
-                }
-                if (convertedLoopState.thisName) {
-                    if (convertedOuterLoopState) {
-                        convertedOuterLoopState.thisName = convertedLoopState.thisName;
-                    }
-                    else {
-                        write("var " + convertedLoopState.thisName + " = this;");
-                        writeLine();
-                    }
-                }
-                if (convertedLoopState.hoistedLocalVariables) {
-                    if (convertedOuterLoopState) {
-                        convertedOuterLoopState.hoistedLocalVariables = convertedLoopState.hoistedLocalVariables;
-                    }
-                    else {
-                        write("var ");
-                        var seen = void 0;
-                        for (var _c = 0, _d = convertedLoopState.hoistedLocalVariables; _c < _d.length; _c++) {
-                            var id = _d[_c];
-                            if (!seen) {
-                                seen = {};
-                            }
-                            else {
-                                write(", ");
-                            }
-                            if (!ts.hasProperty(seen, id.text)) {
-                                emit(id);
-                                seen[id.text] = id.text;
-                            }
-                        }
-                        write(";");
-                        writeLine();
-                    }
-                }
-                var currentLoopState = convertedLoopState;
-                convertedLoopState = convertedOuterLoopState;
-                return { functionName: functionName, paramList: paramList, state: currentLoopState };
-                function processVariableDeclaration(name) {
-                    if (name.kind === 69) {
-                        var nameText = isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(name)
-                            ? getGeneratedNameForNode(name)
-                            : name.text;
-                        loopParameters.push(nameText);
-                        if (resolver.getNodeCheckFlags(name.parent) & 2097152) {
-                            var reassignedVariable = { originalName: name, outParamName: makeUniqueName("out_" + nameText) };
-                            (loopOutParameters || (loopOutParameters = [])).push(reassignedVariable);
-                        }
-                    }
-                    else {
-                        for (var _a = 0, _b = name.elements; _a < _b.length; _a++) {
-                            var element = _b[_a];
-                            processVariableDeclaration(element.name);
-                        }
-                    }
-                }
-            }
-            function emitNormalLoopBody(node, emitAsEmbeddedStatement) {
-                var saveAllowedNonLabeledJumps;
-                if (convertedLoopState) {
-                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-                    convertedLoopState.allowedNonLabeledJumps = 2 | 4;
-                }
-                if (emitAsEmbeddedStatement) {
-                    emitEmbeddedStatement(node.statement);
-                }
-                else if (node.statement.kind === 199) {
-                    emitLines(node.statement.statements);
-                }
-                else {
-                    writeLine();
-                    emit(node.statement);
-                }
-                if (convertedLoopState) {
-                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
-                }
-            }
-            function copyLoopOutParameters(state, copyDirection, emitAsStatements) {
-                if (state.loopOutParameters) {
-                    for (var _a = 0, _b = state.loopOutParameters; _a < _b.length; _a++) {
-                        var outParam = _b[_a];
-                        if (copyDirection === 0) {
-                            emitIdentifier(outParam.originalName);
-                            write(" = " + outParam.outParamName);
-                        }
-                        else {
-                            write(outParam.outParamName + " = ");
-                            emitIdentifier(outParam.originalName);
-                        }
-                        if (emitAsStatements) {
-                            write(";");
-                            writeLine();
-                        }
-                        else {
-                            write(", ");
-                        }
-                    }
-                }
-            }
-            function emitConvertedLoopCall(loop, emitAsBlock) {
-                if (emitAsBlock) {
-                    write(" {");
-                    writeLine();
-                    increaseIndent();
-                }
-                var isSimpleLoop = !(loop.state.nonLocalJumps & ~4) &&
-                    !loop.state.labeledNonLocalBreaks &&
-                    !loop.state.labeledNonLocalContinues;
-                var loopResult = makeUniqueName("state");
-                if (!isSimpleLoop) {
-                    write("var " + loopResult + " = ");
-                }
-                write(loop.functionName + "(" + loop.paramList + ");");
-                writeLine();
-                copyLoopOutParameters(loop.state, 0, true);
-                if (!isSimpleLoop) {
-                    writeLine();
-                    if (loop.state.nonLocalJumps & 8) {
-                        write("if (typeof " + loopResult + " === \"object\") ");
-                        if (convertedLoopState) {
-                            write("return " + loopResult + ";");
-                            convertedLoopState.nonLocalJumps |= 8;
-                        }
-                        else {
-                            write("return " + loopResult + ".value;");
-                        }
-                        writeLine();
-                    }
-                    if (loop.state.nonLocalJumps & 2) {
-                        write("if (" + loopResult + " === \"break\") break;");
-                        writeLine();
-                    }
-                    emitDispatchTableForLabeledJumps(loopResult, loop.state, convertedLoopState);
-                }
-                if (emitAsBlock) {
-                    writeLine();
-                    decreaseIndent();
-                    write("}");
-                }
-                function emitDispatchTableForLabeledJumps(loopResultVariable, currentLoop, outerLoop) {
-                    if (!currentLoop.labeledNonLocalBreaks && !currentLoop.labeledNonLocalContinues) {
-                        return;
-                    }
-                    write("switch(" + loopResultVariable + ") {");
-                    increaseIndent();
-                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalBreaks, true, loopResultVariable, outerLoop);
-                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalContinues, false, loopResultVariable, outerLoop);
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-                function emitDispatchEntriesForLabeledJumps(table, isBreak, loopResultVariable, outerLoop) {
-                    if (!table) {
-                        return;
-                    }
-                    for (var labelText in table) {
-                        var labelMarker = table[labelText];
-                        writeLine();
-                        write("case \"" + labelMarker + "\": ");
-                        if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) {
-                            if (isBreak) {
-                                write("break ");
-                            }
-                            else {
-                                write("continue ");
-                            }
-                            write(labelText + ";");
-                        }
-                        else {
-                            setLabeledJump(outerLoop, isBreak, labelText, labelMarker);
-                            write("return " + loopResultVariable + ";");
-                        }
-                    }
-                }
-            }
-            function emitForStatement(node) {
-                emitLoop(node, emitForStatementWorker);
-            }
-            function emitForStatementWorker(node, loop) {
-                var endPos = emitToken(86, node.pos);
-                write(" ");
-                endPos = emitToken(17, endPos);
-                if (node.initializer && node.initializer.kind === 219) {
-                    var variableDeclarationList = node.initializer;
-                    var startIsEmitted = tryEmitStartOfVariableDeclarationList(variableDeclarationList);
-                    if (startIsEmitted) {
-                        emitCommaList(variableDeclarationList.declarations);
-                    }
-                    else {
-                        emitVariableDeclarationListSkippingUninitializedEntries(variableDeclarationList);
-                    }
-                }
-                else if (node.initializer) {
-                    emit(node.initializer);
-                }
-                write(";");
-                emitOptional(" ", node.condition);
-                write(";");
-                emitOptional(" ", node.incrementor);
-                write(")");
-                if (loop) {
-                    emitConvertedLoopCall(loop, true);
-                }
-                else {
-                    emitNormalLoopBody(node, true);
-                }
-            }
-            function emitForInOrForOfStatement(node) {
-                if (languageVersion < 2 && node.kind === 208) {
-                    emitLoop(node, emitDownLevelForOfStatementWorker);
-                }
-                else {
-                    emitLoop(node, emitForInOrForOfStatementWorker);
-                }
-            }
-            function emitForInOrForOfStatementWorker(node, loop) {
-                var endPos = emitToken(86, node.pos);
-                write(" ");
-                endPos = emitToken(17, endPos);
-                if (node.initializer.kind === 219) {
-                    var variableDeclarationList = node.initializer;
-                    if (variableDeclarationList.declarations.length >= 1) {
-                        tryEmitStartOfVariableDeclarationList(variableDeclarationList);
-                        emit(variableDeclarationList.declarations[0]);
-                    }
-                }
-                else {
-                    emit(node.initializer);
-                }
-                if (node.kind === 207) {
-                    write(" in ");
-                }
-                else {
-                    write(" of ");
-                }
-                emit(node.expression);
-                emitToken(18, node.expression.end);
-                if (loop) {
-                    emitConvertedLoopCall(loop, true);
-                }
-                else {
-                    emitNormalLoopBody(node, true);
-                }
-            }
-            function emitDownLevelForOfStatementWorker(node, loop) {
-                var endPos = emitToken(86, node.pos);
-                write(" ");
-                endPos = emitToken(17, endPos);
-                var counter = createTempVariable(268435456);
-                var rhsReference = ts.createSynthesizedNode(69);
-                rhsReference.text = node.expression.kind === 69 ?
-                    makeUniqueName(node.expression.text) :
-                    makeTempVariableName(0);
-                emitStart(node.expression);
-                write("var ");
-                emitNodeWithoutSourceMap(counter);
-                write(" = 0");
-                emitEnd(node.expression);
-                write(", ");
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(rhsReference);
-                write(" = ");
-                emitNodeWithoutSourceMap(node.expression);
-                emitEnd(node.expression);
-                write("; ");
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(counter);
-                write(" < ");
-                emitNodeWithCommentsAndWithoutSourcemap(rhsReference);
-                write(".length");
-                emitEnd(node.expression);
-                write("; ");
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(counter);
-                write("++");
-                emitEnd(node.expression);
-                emitToken(18, node.expression.end);
-                write(" {");
-                writeLine();
-                increaseIndent();
-                var rhsIterationValue = createElementAccessExpression(rhsReference, counter);
-                emitStart(node.initializer);
-                if (node.initializer.kind === 219) {
-                    write("var ");
-                    var variableDeclarationList = node.initializer;
-                    if (variableDeclarationList.declarations.length > 0) {
-                        var declaration = variableDeclarationList.declarations[0];
-                        if (ts.isBindingPattern(declaration.name)) {
-                            emitDestructuring(declaration, false, rhsIterationValue);
-                        }
-                        else {
-                            emitNodeWithCommentsAndWithoutSourcemap(declaration);
-                            write(" = ");
-                            emitNodeWithoutSourceMap(rhsIterationValue);
-                        }
-                    }
-                    else {
-                        emitNodeWithoutSourceMap(createTempVariable(0));
-                        write(" = ");
-                        emitNodeWithoutSourceMap(rhsIterationValue);
-                    }
-                }
-                else {
-                    var assignmentExpression = createBinaryExpression(node.initializer, 56, rhsIterationValue, false);
-                    if (node.initializer.kind === 170 || node.initializer.kind === 171) {
-                        emitDestructuring(assignmentExpression, true, undefined);
-                    }
-                    else {
-                        emitNodeWithCommentsAndWithoutSourcemap(assignmentExpression);
-                    }
-                }
-                emitEnd(node.initializer);
-                write(";");
-                if (loop) {
-                    writeLine();
-                    emitConvertedLoopCall(loop, false);
-                }
-                else {
-                    emitNormalLoopBody(node, false);
-                }
-                writeLine();
-                decreaseIndent();
-                write("}");
-            }
-            function emitBreakOrContinueStatement(node) {
-                if (convertedLoopState) {
-                    var jump = node.kind === 210 ? 2 : 4;
-                    var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) ||
-                        (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
-                    if (!canUseBreakOrContinue) {
-                        write("return ");
-                        copyLoopOutParameters(convertedLoopState, 1, false);
-                        if (!node.label) {
-                            if (node.kind === 210) {
-                                convertedLoopState.nonLocalJumps |= 2;
-                                write("\"break\";");
-                            }
-                            else {
-                                convertedLoopState.nonLocalJumps |= 4;
-                                write("\"continue\";");
-                            }
-                        }
-                        else {
-                            var labelMarker = void 0;
-                            if (node.kind === 210) {
-                                labelMarker = "break-" + node.label.text;
-                                setLabeledJump(convertedLoopState, true, node.label.text, labelMarker);
-                            }
-                            else {
-                                labelMarker = "continue-" + node.label.text;
-                                setLabeledJump(convertedLoopState, false, node.label.text, labelMarker);
-                            }
-                            write("\"" + labelMarker + "\";");
-                        }
-                        return;
-                    }
-                }
-                emitToken(node.kind === 210 ? 70 : 75, node.pos);
-                emitOptional(" ", node.label);
-                write(";");
-            }
-            function emitReturnStatement(node) {
-                if (convertedLoopState) {
-                    convertedLoopState.nonLocalJumps |= 8;
-                    write("return { value: ");
-                    if (node.expression) {
-                        emit(node.expression);
-                    }
-                    else {
-                        write("void 0");
-                    }
-                    write(" };");
-                    return;
-                }
-                emitToken(94, node.pos);
-                emitOptional(" ", node.expression);
-                write(";");
-            }
-            function emitWithStatement(node) {
-                write("with (");
-                emit(node.expression);
-                write(")");
-                emitEmbeddedStatement(node.statement);
-            }
-            function emitSwitchStatement(node) {
-                var endPos = emitToken(96, node.pos);
-                write(" ");
-                emitToken(17, endPos);
-                emit(node.expression);
-                endPos = emitToken(18, node.expression.end);
-                write(" ");
-                var saveAllowedNonLabeledJumps;
-                if (convertedLoopState) {
-                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-                    convertedLoopState.allowedNonLabeledJumps |= 2;
-                }
-                emitCaseBlock(node.caseBlock, endPos);
-                if (convertedLoopState) {
-                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
-                }
-            }
-            function emitCaseBlock(node, startPos) {
-                emitToken(15, startPos);
-                increaseIndent();
-                emitLines(node.clauses);
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.clauses.end);
-            }
-            function nodeStartPositionsAreOnSameLine(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node1.pos)) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
-            }
-            function nodeEndPositionsAreOnSameLine(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, node2.end);
-            }
-            function nodeEndIsOnSameLineAsNodeStart(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
-            }
-            function emitCaseOrDefaultClause(node) {
-                if (node.kind === 249) {
-                    write("case ");
-                    emit(node.expression);
-                    write(":");
-                }
-                else {
-                    write("default:");
-                }
-                if (node.statements.length === 1 && nodeStartPositionsAreOnSameLine(node, node.statements[0])) {
-                    write(" ");
-                    emit(node.statements[0]);
-                }
-                else {
-                    increaseIndent();
-                    emitLines(node.statements);
-                    decreaseIndent();
-                }
-            }
-            function emitThrowStatement(node) {
-                write("throw ");
-                emit(node.expression);
-                write(";");
-            }
-            function emitTryStatement(node) {
-                write("try ");
-                emit(node.tryBlock);
-                emit(node.catchClause);
-                if (node.finallyBlock) {
-                    writeLine();
-                    write("finally ");
-                    emit(node.finallyBlock);
-                }
-            }
-            function emitCatchClause(node) {
-                writeLine();
-                var endPos = emitToken(72, node.pos);
-                write(" ");
-                emitToken(17, endPos);
-                emit(node.variableDeclaration);
-                emitToken(18, node.variableDeclaration ? node.variableDeclaration.end : endPos);
-                write(" ");
-                emitBlock(node.block);
-            }
-            function emitDebuggerStatement(node) {
-                emitToken(76, node.pos);
-                write(";");
-            }
-            function emitLabelAndColon(node) {
-                emit(node.label);
-                write(": ");
-            }
-            function emitLabeledStatement(node) {
-                if (!ts.isIterationStatement(node.statement, false) || !shouldConvertLoopBody(node.statement)) {
-                    emitLabelAndColon(node);
-                }
-                if (convertedLoopState) {
-                    if (!convertedLoopState.labels) {
-                        convertedLoopState.labels = {};
-                    }
-                    convertedLoopState.labels[node.label.text] = node.label.text;
-                }
-                emit(node.statement);
-                if (convertedLoopState) {
-                    convertedLoopState.labels[node.label.text] = undefined;
-                }
-            }
-            function getContainingModule(node) {
-                do {
-                    node = node.parent;
-                } while (node && node.kind !== 225);
-                return node;
-            }
-            function emitContainingModuleName(node) {
-                var container = getContainingModule(node);
-                write(container ? getGeneratedNameForNode(container) : "exports");
-            }
-            function emitModuleMemberName(node) {
-                emitStart(node.name);
-                if (ts.getCombinedNodeFlags(node) & 1) {
-                    var container = getContainingModule(node);
-                    if (container) {
-                        write(getGeneratedNameForNode(container));
-                        write(".");
-                    }
-                    else if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
-                        write("exports.");
-                    }
-                }
-                emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                emitEnd(node.name);
-            }
-            function createVoidZero() {
-                var zero = ts.createSynthesizedNode(8);
-                zero.text = "0";
-                var result = ts.createSynthesizedNode(183);
-                result.expression = zero;
-                return result;
-            }
-            function emitEs6ExportDefaultCompat(node) {
-                if (node.parent.kind === 256) {
-                    ts.Debug.assert(!!(node.flags & 512) || node.kind === 235);
-                    if (modulekind === ts.ModuleKind.CommonJS || modulekind === ts.ModuleKind.AMD || modulekind === ts.ModuleKind.UMD) {
-                        if (!isEs6Module) {
-                            if (languageVersion !== 0) {
-                                write('Object.defineProperty(exports, "__esModule", { value: true });');
-                                writeLine();
-                            }
-                            else {
-                                write("exports.__esModule = true;");
-                                writeLine();
-                            }
-                        }
-                    }
-                }
-            }
-            function emitExportMemberAssignment(node) {
-                if (node.flags & 1) {
-                    writeLine();
-                    emitStart(node);
-                    if (modulekind === ts.ModuleKind.System && node.parent === currentSourceFile) {
-                        write(exportFunctionForFile + "(\"");
-                        if (node.flags & 512) {
-                            write("default");
-                        }
-                        else {
-                            emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                        }
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(")");
-                    }
-                    else {
-                        if (node.flags & 512) {
-                            emitEs6ExportDefaultCompat(node);
-                            if (languageVersion === 0) {
-                                write('exports["default"]');
-                            }
-                            else {
-                                write("exports.default");
-                            }
-                        }
-                        else {
-                            emitModuleMemberName(node);
-                        }
-                        write(" = ");
-                        emitDeclarationName(node);
-                    }
-                    emitEnd(node);
-                    write(";");
-                }
-            }
-            function emitExportMemberAssignments(name) {
-                if (modulekind === ts.ModuleKind.System) {
-                    return;
-                }
-                if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
-                    for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
-                        var specifier = _b[_a];
-                        writeLine();
-                        emitStart(specifier.name);
-                        emitContainingModuleName(specifier);
-                        write(".");
-                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                        emitEnd(specifier.name);
-                        write(" = ");
-                        emitExpressionIdentifier(name);
-                        write(";");
-                    }
-                }
-            }
-            function emitExportSpecifierInSystemModule(specifier) {
-                ts.Debug.assert(modulekind === ts.ModuleKind.System);
-                if (!resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name) && !resolver.isValueAliasDeclaration(specifier)) {
-                    return;
-                }
-                writeLine();
-                emitStart(specifier.name);
-                write(exportFunctionForFile + "(\"");
-                emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                write("\", ");
-                emitExpressionIdentifier(specifier.propertyName || specifier.name);
-                write(")");
-                emitEnd(specifier.name);
-                write(";");
-            }
-            function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) {
-                if (shouldEmitCommaBeforeAssignment) {
-                    write(", ");
-                }
-                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name);
-                if (exportChanged) {
-                    write(exportFunctionForFile + "(\"");
-                    emitNodeWithCommentsAndWithoutSourcemap(name);
-                    write("\", ");
-                }
-                var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 || name.parent.kind === 169);
-                emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap);
-                withTemporaryNoSourceMap(function () {
-                    if (isVariableDeclarationOrBindingElement) {
-                        emitModuleMemberName(name.parent);
-                    }
-                    else {
-                        emit(name);
-                    }
-                    write(" = ");
-                    emit(value);
-                });
-                emitEnd(nodeForSourceMap, true);
-                if (exportChanged) {
-                    write(")");
-                }
-            }
-            function emitTempVariableAssignment(expression, canDefineTempVariablesInPlace, shouldEmitCommaBeforeAssignment, sourceMapNode) {
-                var identifier = createTempVariable(0);
-                if (!canDefineTempVariablesInPlace) {
-                    recordTempDeclaration(identifier);
-                }
-                emitAssignment(identifier, expression, shouldEmitCommaBeforeAssignment, sourceMapNode || expression.parent);
-                return identifier;
-            }
-            function isFirstVariableDeclaration(root) {
-                return root.kind === 218 &&
-                    root.parent.kind === 219 &&
-                    root.parent.declarations[0] === root;
-            }
-            function emitDestructuring(root, isAssignmentExpressionStatement, value) {
-                var emitCount = 0;
-                var canDefineTempVariablesInPlace = false;
-                if (root.kind === 218) {
-                    var isExported = ts.getCombinedNodeFlags(root) & 1;
-                    var isSourceLevelForSystemModuleKind = shouldHoistDeclarationInSystemJsModule(root);
-                    canDefineTempVariablesInPlace = !isExported && !isSourceLevelForSystemModuleKind;
-                }
-                else if (root.kind === 142) {
-                    canDefineTempVariablesInPlace = true;
-                }
-                if (root.kind === 187) {
-                    emitAssignmentExpression(root);
-                }
-                else {
-                    ts.Debug.assert(!isAssignmentExpressionStatement);
-                    if (isFirstVariableDeclaration(root)) {
-                        sourceMap.changeEmitSourcePos();
-                    }
-                    emitBindingElement(root, value);
-                }
-                function ensureIdentifier(expr, reuseIdentifierExpressions, sourceMapNode) {
-                    if (expr.kind === 69 && reuseIdentifierExpressions) {
-                        return expr;
-                    }
-                    var identifier = emitTempVariableAssignment(expr, canDefineTempVariablesInPlace, emitCount > 0, sourceMapNode);
-                    emitCount++;
-                    return identifier;
-                }
-                function createDefaultValueCheck(value, defaultValue, sourceMapNode) {
-                    value = ensureIdentifier(value, true, sourceMapNode);
-                    var equals = ts.createSynthesizedNode(187);
-                    equals.left = value;
-                    equals.operatorToken = ts.createSynthesizedNode(32);
-                    equals.right = createVoidZero();
-                    return createConditionalExpression(equals, defaultValue, value);
-                }
-                function createConditionalExpression(condition, whenTrue, whenFalse) {
-                    var cond = ts.createSynthesizedNode(188);
-                    cond.condition = condition;
-                    cond.questionToken = ts.createSynthesizedNode(53);
-                    cond.whenTrue = whenTrue;
-                    cond.colonToken = ts.createSynthesizedNode(54);
-                    cond.whenFalse = whenFalse;
-                    return cond;
-                }
-                function createNumericLiteral(value) {
-                    var node = ts.createSynthesizedNode(8);
-                    node.text = "" + value;
-                    return node;
-                }
-                function createPropertyAccessForDestructuringProperty(object, propName) {
-                    var index;
-                    var nameIsComputed = propName.kind === 140;
-                    if (nameIsComputed) {
-                        index = ensureIdentifier(propName.expression, false, propName);
-                    }
-                    else {
-                        index = ts.createSynthesizedNode(propName.kind);
-                        index.text = ts.unescapeIdentifier(propName.text);
-                    }
-                    return !nameIsComputed && index.kind === 69
-                        ? createPropertyAccessExpression(object, index)
-                        : createElementAccessExpression(object, index);
-                }
-                function createSliceCall(value, sliceIndex) {
-                    var call = ts.createSynthesizedNode(174);
-                    var sliceIdentifier = ts.createSynthesizedNode(69);
-                    sliceIdentifier.text = "slice";
-                    call.expression = createPropertyAccessExpression(value, sliceIdentifier);
-                    call.arguments = ts.createSynthesizedNodeArray();
-                    call.arguments[0] = createNumericLiteral(sliceIndex);
-                    return call;
-                }
-                function emitObjectLiteralAssignment(target, value, sourceMapNode) {
-                    var properties = target.properties;
-                    if (properties.length !== 1) {
-                        value = ensureIdentifier(value, true, sourceMapNode);
-                    }
-                    for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) {
-                        var p = properties_5[_a];
-                        if (p.kind === 253 || p.kind === 254) {
-                            var propName = p.name;
-                            var target_1 = p.kind === 254 ? p : p.initializer || propName;
-                            emitDestructuringAssignment(target_1, createPropertyAccessForDestructuringProperty(value, propName), p);
-                        }
-                    }
-                }
-                function emitArrayLiteralAssignment(target, value, sourceMapNode) {
-                    var elements = target.elements;
-                    if (elements.length !== 1) {
-                        value = ensureIdentifier(value, true, sourceMapNode);
-                    }
-                    for (var i = 0; i < elements.length; i++) {
-                        var e = elements[i];
-                        if (e.kind !== 193) {
-                            if (e.kind !== 191) {
-                                emitDestructuringAssignment(e, createElementAccessExpression(value, createNumericLiteral(i)), e);
-                            }
-                            else if (i === elements.length - 1) {
-                                emitDestructuringAssignment(e.expression, createSliceCall(value, i), e);
-                            }
-                        }
-                    }
-                }
-                function emitDestructuringAssignment(target, value, sourceMapNode) {
-                    if (target.kind === 254) {
-                        if (target.objectAssignmentInitializer) {
-                            value = createDefaultValueCheck(value, target.objectAssignmentInitializer, sourceMapNode);
-                        }
-                        target = target.name;
-                    }
-                    else if (target.kind === 187 && target.operatorToken.kind === 56) {
-                        value = createDefaultValueCheck(value, target.right, sourceMapNode);
-                        target = target.left;
-                    }
-                    if (target.kind === 171) {
-                        emitObjectLiteralAssignment(target, value, sourceMapNode);
-                    }
-                    else if (target.kind === 170) {
-                        emitArrayLiteralAssignment(target, value, sourceMapNode);
-                    }
-                    else {
-                        emitAssignment(target, value, emitCount > 0, sourceMapNode);
-                        emitCount++;
-                    }
-                }
-                function emitAssignmentExpression(root) {
-                    var target = root.left;
-                    var value = root.right;
-                    if (ts.isEmptyObjectLiteralOrArrayLiteral(target)) {
-                        emit(value);
-                    }
-                    else if (isAssignmentExpressionStatement) {
-                        emitDestructuringAssignment(target, value, ts.nodeIsSynthesized(root) ? target : root);
-                    }
-                    else {
-                        if (root.parent.kind !== 178) {
-                            write("(");
-                        }
-                        value = ensureIdentifier(value, true, root);
-                        emitDestructuringAssignment(target, value, root);
-                        write(", ");
-                        emit(value);
-                        if (root.parent.kind !== 178) {
-                            write(")");
-                        }
-                    }
-                }
-                function emitBindingElement(target, value) {
-                    if (target.initializer) {
-                        value = value ? createDefaultValueCheck(value, target.initializer, target) : target.initializer;
-                    }
-                    else if (!value) {
-                        value = createVoidZero();
-                    }
-                    if (ts.isBindingPattern(target.name)) {
-                        var pattern = target.name;
-                        var elements = pattern.elements;
-                        var numElements = elements.length;
-                        if (numElements !== 1) {
-                            value = ensureIdentifier(value, numElements !== 0, target);
-                        }
-                        for (var i = 0; i < numElements; i++) {
-                            var element = elements[i];
-                            if (pattern.kind === 167) {
-                                var propName = element.propertyName || element.name;
-                                emitBindingElement(element, createPropertyAccessForDestructuringProperty(value, propName));
-                            }
-                            else if (element.kind !== 193) {
-                                if (!element.dotDotDotToken) {
-                                    emitBindingElement(element, createElementAccessExpression(value, createNumericLiteral(i)));
-                                }
-                                else if (i === numElements - 1) {
-                                    emitBindingElement(element, createSliceCall(value, i));
-                                }
-                            }
-                        }
-                    }
-                    else {
-                        emitAssignment(target.name, value, emitCount > 0, target);
-                        emitCount++;
-                    }
-                }
-            }
-            function emitVariableDeclaration(node) {
-                if (ts.isBindingPattern(node.name)) {
-                    var isExported = ts.getCombinedNodeFlags(node) & 1;
-                    if (languageVersion >= 2 && (!isExported || modulekind === ts.ModuleKind.ES6)) {
-                        var isTopLevelDeclarationInSystemModule = modulekind === ts.ModuleKind.System &&
-                            shouldHoistVariable(node, true);
-                        if (isTopLevelDeclarationInSystemModule) {
-                            write("(");
-                        }
-                        emit(node.name);
-                        emitOptional(" = ", node.initializer);
-                        if (isTopLevelDeclarationInSystemModule) {
-                            write(")");
-                        }
-                    }
-                    else {
-                        emitDestructuring(node, false);
-                    }
-                }
-                else {
-                    var initializer = node.initializer;
-                    if (!initializer &&
-                        languageVersion < 2 &&
-                        node.name.kind === 69) {
-                        var container = ts.getEnclosingBlockScopeContainer(node);
-                        var flags = resolver.getNodeCheckFlags(node);
-                        var isCapturedInFunction = flags & 131072;
-                        var isDeclaredInLoop = flags & 262144;
-                        var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(container) ||
-                            (isCapturedInFunction && isDeclaredInLoop && container.kind === 199 && ts.isIterationStatement(container.parent, false));
-                        var emittedAsNestedLetDeclaration = ts.getCombinedNodeFlags(node) & 1024 &&
-                            !emittedAsTopLevel;
-                        var emitExplicitInitializer = emittedAsNestedLetDeclaration &&
-                            container.kind !== 207 &&
-                            container.kind !== 208 &&
-                            (!resolver.isDeclarationWithCollidingName(node) ||
-                                (isDeclaredInLoop && !isCapturedInFunction && !ts.isIterationStatement(container, false)));
-                        if (emitExplicitInitializer) {
-                            initializer = createVoidZero();
-                        }
-                    }
-                    var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.name);
-                    if (exportChanged) {
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                        write("\", ");
-                    }
-                    emitModuleMemberName(node);
-                    emitOptional(" = ", initializer);
-                    if (exportChanged) {
-                        write(")");
-                    }
-                }
-            }
-            function emitExportVariableAssignments(node) {
-                if (node.kind === 193) {
-                    return;
-                }
-                var name = node.name;
-                if (name.kind === 69) {
-                    emitExportMemberAssignments(name);
-                }
-                else if (ts.isBindingPattern(name)) {
-                    ts.forEach(name.elements, emitExportVariableAssignments);
-                }
-            }
-            function isES6ExportedDeclaration(node) {
-                return !!(node.flags & 1) &&
-                    modulekind === ts.ModuleKind.ES6 &&
-                    node.parent.kind === 256;
-            }
-            function emitVariableStatement(node) {
-                var startIsEmitted = false;
-                if (node.flags & 1) {
-                    if (isES6ExportedDeclaration(node)) {
-                        write("export ");
-                        startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
-                    }
-                }
-                else {
-                    startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
-                }
-                if (startIsEmitted) {
-                    emitCommaList(node.declarationList.declarations);
-                    write(";");
-                }
-                else {
-                    var atLeastOneItem = emitVariableDeclarationListSkippingUninitializedEntries(node.declarationList);
-                    if (atLeastOneItem) {
-                        write(";");
-                    }
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
-                    ts.forEach(node.declarationList.declarations, emitExportVariableAssignments);
-                }
-            }
-            function shouldEmitLeadingAndTrailingCommentsForVariableStatement(node) {
-                if (!(node.flags & 1)) {
-                    return true;
-                }
-                if (isES6ExportedDeclaration(node)) {
-                    return true;
-                }
-                for (var _a = 0, _b = node.declarationList.declarations; _a < _b.length; _a++) {
-                    var declaration = _b[_a];
-                    if (declaration.initializer) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function emitParameter(node) {
-                if (languageVersion < 2) {
-                    if (ts.isBindingPattern(node.name)) {
-                        var name_28 = createTempVariable(0);
-                        if (!tempParameters) {
-                            tempParameters = [];
-                        }
-                        tempParameters.push(name_28);
-                        emit(name_28);
-                    }
-                    else {
-                        emit(node.name);
-                    }
-                }
-                else {
-                    if (node.dotDotDotToken) {
-                        write("...");
-                    }
-                    emit(node.name);
-                    emitOptional(" = ", node.initializer);
-                }
-            }
-            function emitDefaultValueAssignments(node) {
-                if (languageVersion < 2) {
-                    var tempIndex_1 = 0;
-                    ts.forEach(node.parameters, function (parameter) {
-                        if (parameter.dotDotDotToken) {
-                            return;
-                        }
-                        var paramName = parameter.name, initializer = parameter.initializer;
-                        if (ts.isBindingPattern(paramName)) {
-                            var hasBindingElements = paramName.elements.length > 0;
-                            if (hasBindingElements || initializer) {
-                                writeLine();
-                                write("var ");
-                                if (hasBindingElements) {
-                                    emitDestructuring(parameter, false, tempParameters[tempIndex_1]);
-                                }
-                                else {
-                                    emit(tempParameters[tempIndex_1]);
-                                    write(" = ");
-                                    emit(initializer);
-                                }
-                                write(";");
-                                tempIndex_1++;
-                            }
-                        }
-                        else if (initializer) {
-                            writeLine();
-                            emitStart(parameter);
-                            write("if (");
-                            emitNodeWithoutSourceMap(paramName);
-                            write(" === void 0)");
-                            emitEnd(parameter);
-                            write(" { ");
-                            emitStart(parameter);
-                            emitNodeWithCommentsAndWithoutSourcemap(paramName);
-                            write(" = ");
-                            emitNodeWithCommentsAndWithoutSourcemap(initializer);
-                            emitEnd(parameter);
-                            write("; }");
-                        }
-                    });
-                }
-            }
-            function emitRestParameter(node) {
-                if (languageVersion < 2 && ts.hasDeclaredRestParameter(node)) {
-                    var restIndex = node.parameters.length - 1;
-                    var restParam = node.parameters[restIndex];
-                    if (ts.isBindingPattern(restParam.name)) {
-                        return;
-                    }
-                    var tempName = createTempVariable(268435456).text;
-                    writeLine();
-                    emitLeadingComments(restParam);
-                    emitStart(restParam);
-                    write("var ");
-                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
-                    write(" = [];");
-                    emitEnd(restParam);
-                    emitTrailingComments(restParam);
-                    writeLine();
-                    write("for (");
-                    emitStart(restParam);
-                    write("var " + tempName + " = " + restIndex + ";");
-                    emitEnd(restParam);
-                    write(" ");
-                    emitStart(restParam);
-                    write(tempName + " < arguments.length;");
-                    emitEnd(restParam);
-                    write(" ");
-                    emitStart(restParam);
-                    write(tempName + "++");
-                    emitEnd(restParam);
-                    write(") {");
-                    increaseIndent();
-                    writeLine();
-                    emitStart(restParam);
-                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
-                    write("[" + tempName + " - " + restIndex + "] = arguments[" + tempName + "];");
-                    emitEnd(restParam);
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function emitAccessor(node) {
-                write(node.kind === 149 ? "get " : "set ");
-                emit(node.name);
-                emitSignatureAndBody(node);
-            }
-            function shouldEmitAsArrowFunction(node) {
-                return node.kind === 180 && languageVersion >= 2;
-            }
-            function emitDeclarationName(node) {
-                if (node.name) {
-                    emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                }
-                else {
-                    write(getGeneratedNameForNode(node));
-                }
-            }
-            function shouldEmitFunctionName(node) {
-                if (node.kind === 179) {
-                    return !!node.name;
-                }
-                if (node.kind === 220) {
-                    return !!node.name || modulekind !== ts.ModuleKind.ES6;
-                }
-            }
-            function emitFunctionDeclaration(node) {
-                if (ts.nodeIsMissing(node.body)) {
-                    return emitCommentsOnNotEmittedNode(node);
-                }
-                var kind = node.kind, parent = node.parent;
-                if (kind !== 147 &&
-                    kind !== 146 &&
-                    parent &&
-                    parent.kind !== 253 &&
-                    parent.kind !== 174 &&
-                    parent.kind !== 170) {
-                    emitLeadingComments(node);
-                }
-                emitStart(node);
-                if (!shouldEmitAsArrowFunction(node)) {
-                    if (isES6ExportedDeclaration(node)) {
-                        write("export ");
-                        if (node.flags & 512) {
-                            write("default ");
-                        }
-                    }
-                    write("function");
-                    if (languageVersion >= 2 && node.asteriskToken) {
-                        write("*");
-                    }
-                    write(" ");
-                }
-                if (shouldEmitFunctionName(node)) {
-                    emitDeclarationName(node);
-                }
-                emitSignatureAndBody(node);
-                if (modulekind !== ts.ModuleKind.ES6 && kind === 220 && parent === currentSourceFile && node.name) {
-                    emitExportMemberAssignments(node.name);
-                }
-                emitEnd(node);
-                if (kind !== 147 &&
-                    kind !== 146 &&
-                    kind !== 180) {
-                    emitTrailingComments(node);
-                }
-            }
-            function emitCaptureThisForNodeIfNecessary(node) {
-                if (resolver.getNodeCheckFlags(node) & 4) {
-                    writeLine();
-                    emitStart(node);
-                    write("var _this = this;");
-                    emitEnd(node);
-                }
-            }
-            function emitSignatureParameters(node) {
-                increaseIndent();
-                write("(");
-                if (node) {
-                    var parameters = node.parameters;
-                    var skipCount = node.parameters.length && node.parameters[0].name.text === "this" ? 1 : 0;
-                    var omitCount = languageVersion < 2 && ts.hasDeclaredRestParameter(node) ? 1 : 0;
-                    emitList(parameters, skipCount, parameters.length - omitCount - skipCount, false, false);
-                }
-                write(")");
-                decreaseIndent();
-            }
-            function emitSignatureParametersForArrow(node) {
-                if (node.parameters.length === 1 && node.pos === node.parameters[0].pos) {
-                    emit(node.parameters[0]);
-                    return;
-                }
-                emitSignatureParameters(node);
-            }
-            function emitAsyncFunctionBodyForES6(node) {
-                var promiseConstructor = ts.getEntityNameFromTypeNode(node.type);
-                var isArrowFunction = node.kind === 180;
-                var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192) !== 0;
-                if (!isArrowFunction) {
-                    write(" {");
-                    increaseIndent();
-                    writeLine();
-                    if (resolver.getNodeCheckFlags(node) & 4096) {
-                        writeLines("\nconst _super = (function (geti, seti) {\n    const cache = Object.create(null);\n    return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);");
-                        writeLine();
-                    }
-                    else if (resolver.getNodeCheckFlags(node) & 2048) {
-                        write("const _super = name => super[name];");
-                        writeLine();
-                    }
-                    write("return");
-                }
-                write(" __awaiter(this");
-                if (hasLexicalArguments) {
-                    write(", arguments, ");
-                }
-                else {
-                    write(", void 0, ");
-                }
-                if (languageVersion >= 2 || !promiseConstructor) {
-                    write("void 0");
-                }
-                else {
-                    emitEntityNameAsExpression(promiseConstructor, false);
-                }
-                write(", function* ()");
-                emitFunctionBody(node);
-                write(")");
-                if (!isArrowFunction) {
-                    write(";");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function emitFunctionBody(node) {
-                if (!node.body) {
-                    write(" { }");
-                }
-                else {
-                    if (node.body.kind === 199) {
-                        emitBlockFunctionBody(node, node.body);
-                    }
-                    else {
-                        emitExpressionFunctionBody(node, node.body);
-                    }
-                }
-            }
-            function emitSignatureAndBody(node) {
-                var saveConvertedLoopState = convertedLoopState;
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                if (shouldEmitAsArrowFunction(node)) {
-                    emitSignatureParametersForArrow(node);
-                    write(" =>");
-                }
-                else {
-                    emitSignatureParameters(node);
-                }
-                var isAsync = ts.isAsyncFunctionLike(node);
-                if (isAsync) {
-                    emitAsyncFunctionBodyForES6(node);
-                }
-                else {
-                    emitFunctionBody(node);
-                }
-                if (!isES6ExportedDeclaration(node)) {
-                    emitExportMemberAssignment(node);
-                }
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-            }
-            function emitFunctionBodyPreamble(node) {
-                emitCaptureThisForNodeIfNecessary(node);
-                emitDefaultValueAssignments(node);
-                emitRestParameter(node);
-            }
-            function emitExpressionFunctionBody(node, body) {
-                if (languageVersion < 2 || node.flags & 256) {
-                    emitDownLevelExpressionFunctionBody(node, body);
-                    return;
-                }
-                write(" ");
-                var current = body;
-                while (current.kind === 177) {
-                    current = current.expression;
-                }
-                emitParenthesizedIf(body, current.kind === 171);
-            }
-            function emitDownLevelExpressionFunctionBody(node, body) {
-                write(" {");
-                increaseIndent();
-                var outPos = writer.getTextPos();
-                emitDetachedCommentsAndUpdateCommentsInfo(node.body);
-                emitFunctionBodyPreamble(node);
-                var preambleEmitted = writer.getTextPos() !== outPos;
-                decreaseIndent();
-                if (!preambleEmitted && nodeStartPositionsAreOnSameLine(node, body)) {
-                    write(" ");
-                    emitStart(body);
-                    write("return ");
-                    emit(body);
-                    emitEnd(body);
-                    write(";");
-                    emitTempDeclarations(false);
-                    write(" ");
-                }
-                else {
-                    increaseIndent();
-                    writeLine();
-                    emitLeadingComments(node.body);
-                    emitStart(body);
-                    write("return ");
-                    emit(body);
-                    emitEnd(body);
-                    write(";");
-                    emitTrailingComments(node.body);
-                    emitTempDeclarations(true);
-                    decreaseIndent();
-                    writeLine();
-                }
-                emitStart(node.body);
-                write("}");
-                emitEnd(node.body);
-            }
-            function emitBlockFunctionBody(node, body) {
-                write(" {");
-                var initialTextPos = writer.getTextPos();
-                increaseIndent();
-                emitDetachedCommentsAndUpdateCommentsInfo(body.statements);
-                var startIndex = emitDirectivePrologues(body.statements, true);
-                emitFunctionBodyPreamble(node);
-                decreaseIndent();
-                var preambleEmitted = writer.getTextPos() !== initialTextPos;
-                if (!preambleEmitted && nodeEndIsOnSameLineAsNodeStart(body, body)) {
-                    for (var _a = 0, _b = body.statements; _a < _b.length; _a++) {
-                        var statement = _b[_a];
-                        write(" ");
-                        emit(statement);
-                    }
-                    emitTempDeclarations(false);
-                    write(" ");
-                    emitLeadingCommentsOfPosition(body.statements.end);
-                }
-                else {
-                    increaseIndent();
-                    emitLinesStartingAt(body.statements, startIndex);
-                    emitTempDeclarations(true);
-                    writeLine();
-                    emitLeadingCommentsOfPosition(body.statements.end);
-                    decreaseIndent();
-                }
-                emitToken(16, body.statements.end);
-            }
-            function getSuperCallAtGivenIndex(ctor, index) {
-                if (!ctor.body) {
-                    return undefined;
-                }
-                var statements = ctor.body.statements;
-                if (!statements || index >= statements.length) {
-                    return undefined;
-                }
-                var statement = statements[index];
-                if (statement.kind === 202) {
-                    return ts.isSuperCallExpression(statement.expression) ? statement : undefined;
-                }
-            }
-            function emitParameterPropertyAssignments(node) {
-                ts.forEach(node.parameters, function (param) {
-                    if (param.flags & 92) {
-                        writeLine();
-                        emitStart(param);
-                        emitStart(param.name);
-                        write("this.");
-                        emitNodeWithoutSourceMap(param.name);
-                        emitEnd(param.name);
-                        write(" = ");
-                        emit(param.name);
-                        write(";");
-                        emitEnd(param);
-                    }
-                });
-            }
-            function emitMemberAccessForPropertyName(memberName) {
-                if (memberName.kind === 9 || memberName.kind === 8) {
-                    write("[");
-                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
-                    write("]");
-                }
-                else if (memberName.kind === 140) {
-                    emitComputedPropertyName(memberName);
-                }
-                else {
-                    write(".");
-                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
-                }
-            }
-            function getInitializedProperties(node, isStatic) {
-                var properties = [];
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    if (member.kind === 145 && isStatic === ((member.flags & 32) !== 0) && member.initializer) {
-                        properties.push(member);
-                    }
-                }
-                return properties;
-            }
-            function emitPropertyDeclarations(node, properties) {
-                for (var _a = 0, properties_6 = properties; _a < properties_6.length; _a++) {
-                    var property = properties_6[_a];
-                    emitPropertyDeclaration(node, property);
-                }
-            }
-            function emitPropertyDeclaration(node, property, receiver, isExpression) {
-                writeLine();
-                emitLeadingComments(property);
-                emitStart(property);
-                emitStart(property.name);
-                if (receiver) {
-                    emit(receiver);
-                }
-                else {
-                    if (property.flags & 32) {
-                        emitDeclarationName(node);
-                    }
-                    else {
-                        write("this");
-                    }
-                }
-                emitMemberAccessForPropertyName(property.name);
-                emitEnd(property.name);
-                write(" = ");
-                emit(property.initializer);
-                if (!isExpression) {
-                    write(";");
-                }
-                emitEnd(property);
-                emitTrailingComments(property);
-            }
-            function emitMemberFunctionsForES5AndLower(node) {
-                ts.forEach(node.members, function (member) {
-                    if (member.kind === 198) {
-                        writeLine();
-                        write(";");
-                    }
-                    else if (member.kind === 147 || node.kind === 146) {
-                        if (!member.body) {
-                            return emitCommentsOnNotEmittedNode(member);
-                        }
-                        writeLine();
-                        emitLeadingComments(member);
-                        emitStart(member);
-                        emitStart(member.name);
-                        emitClassMemberPrefix(node, member);
-                        emitMemberAccessForPropertyName(member.name);
-                        emitEnd(member.name);
-                        write(" = ");
-                        emitFunctionDeclaration(member);
-                        emitEnd(member);
-                        write(";");
-                        emitTrailingComments(member);
-                    }
-                    else if (member.kind === 149 || member.kind === 150) {
-                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
-                        if (member === accessors.firstAccessor) {
-                            writeLine();
-                            emitStart(member);
-                            write("Object.defineProperty(");
-                            emitStart(member.name);
-                            emitClassMemberPrefix(node, member);
-                            write(", ");
-                            emitExpressionForPropertyName(member.name);
-                            emitEnd(member.name);
-                            write(", {");
-                            increaseIndent();
-                            if (accessors.getAccessor) {
-                                writeLine();
-                                emitLeadingComments(accessors.getAccessor);
-                                write("get: ");
-                                emitStart(accessors.getAccessor);
-                                write("function ");
-                                emitSignatureAndBody(accessors.getAccessor);
-                                emitEnd(accessors.getAccessor);
-                                emitTrailingComments(accessors.getAccessor);
-                                write(",");
-                            }
-                            if (accessors.setAccessor) {
-                                writeLine();
-                                emitLeadingComments(accessors.setAccessor);
-                                write("set: ");
-                                emitStart(accessors.setAccessor);
-                                write("function ");
-                                emitSignatureAndBody(accessors.setAccessor);
-                                emitEnd(accessors.setAccessor);
-                                emitTrailingComments(accessors.setAccessor);
-                                write(",");
-                            }
-                            writeLine();
-                            write("enumerable: true,");
-                            writeLine();
-                            write("configurable: true");
-                            decreaseIndent();
-                            writeLine();
-                            write("});");
-                            emitEnd(member);
-                        }
-                    }
-                });
-            }
-            function emitMemberFunctionsForES6AndHigher(node) {
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    if ((member.kind === 147 || node.kind === 146) && !member.body) {
-                        emitCommentsOnNotEmittedNode(member);
-                    }
-                    else if (member.kind === 147 ||
-                        member.kind === 149 ||
-                        member.kind === 150) {
-                        writeLine();
-                        emitLeadingComments(member);
-                        emitStart(member);
-                        if (member.flags & 32) {
-                            write("static ");
-                        }
-                        if (member.kind === 149) {
-                            write("get ");
-                        }
-                        else if (member.kind === 150) {
-                            write("set ");
-                        }
-                        if (member.asteriskToken) {
-                            write("*");
-                        }
-                        emit(member.name);
-                        emitSignatureAndBody(member);
-                        emitEnd(member);
-                        emitTrailingComments(member);
-                    }
-                    else if (member.kind === 198) {
-                        writeLine();
-                        write(";");
-                    }
-                }
-            }
-            function emitConstructor(node, baseTypeElement) {
-                var saveConvertedLoopState = convertedLoopState;
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                emitConstructorWorker(node, baseTypeElement);
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-            }
-            function emitConstructorWorker(node, baseTypeElement) {
-                var hasInstancePropertyWithInitializer = false;
-                ts.forEach(node.members, function (member) {
-                    if (member.kind === 148 && !member.body) {
-                        emitCommentsOnNotEmittedNode(member);
-                    }
-                    if (member.kind === 145 && member.initializer && (member.flags & 32) === 0) {
-                        hasInstancePropertyWithInitializer = true;
-                    }
-                });
-                var ctor = ts.getFirstConstructorWithBody(node);
-                if (languageVersion >= 2 && !ctor && !hasInstancePropertyWithInitializer) {
-                    return;
-                }
-                if (ctor) {
-                    emitLeadingComments(ctor);
-                }
-                emitStart(ctor || node);
-                if (languageVersion < 2) {
-                    write("function ");
-                    emitDeclarationName(node);
-                    emitSignatureParameters(ctor);
-                }
-                else {
-                    write("constructor");
-                    if (ctor) {
-                        emitSignatureParameters(ctor);
-                    }
-                    else {
-                        if (baseTypeElement) {
-                            write("(...args)");
-                        }
-                        else {
-                            write("()");
-                        }
-                    }
-                }
-                var startIndex = 0;
-                write(" {");
-                increaseIndent();
-                if (ctor) {
-                    startIndex = emitDirectivePrologues(ctor.body.statements, true);
-                    emitDetachedCommentsAndUpdateCommentsInfo(ctor.body.statements);
-                }
-                emitCaptureThisForNodeIfNecessary(node);
-                var superCall;
-                if (ctor) {
-                    emitDefaultValueAssignments(ctor);
-                    emitRestParameter(ctor);
-                    if (baseTypeElement) {
-                        superCall = getSuperCallAtGivenIndex(ctor, startIndex);
-                        if (superCall) {
-                            writeLine();
-                            emit(superCall);
-                        }
-                    }
-                    emitParameterPropertyAssignments(ctor);
-                }
-                else {
-                    if (baseTypeElement) {
-                        writeLine();
-                        emitStart(baseTypeElement);
-                        if (languageVersion < 2) {
-                            write("_super.apply(this, arguments);");
-                        }
-                        else {
-                            write("super(...args);");
-                        }
-                        emitEnd(baseTypeElement);
-                    }
-                }
-                emitPropertyDeclarations(node, getInitializedProperties(node, false));
-                if (ctor) {
-                    var statements = ctor.body.statements;
-                    if (superCall) {
-                        statements = statements.slice(1);
-                    }
-                    emitLinesStartingAt(statements, startIndex);
-                }
-                emitTempDeclarations(true);
-                writeLine();
-                if (ctor) {
-                    emitLeadingCommentsOfPosition(ctor.body.statements.end);
-                }
-                decreaseIndent();
-                emitToken(16, ctor ? ctor.body.statements.end : node.members.end);
-                emitEnd(ctor || node);
-                if (ctor) {
-                    emitTrailingComments(ctor);
-                }
-            }
-            function emitClassExpression(node) {
-                return emitClassLikeDeclaration(node);
-            }
-            function emitClassDeclaration(node) {
-                return emitClassLikeDeclaration(node);
-            }
-            function emitClassLikeDeclaration(node) {
-                if (languageVersion < 2) {
-                    emitClassLikeDeclarationBelowES6(node);
-                }
-                else {
-                    emitClassLikeDeclarationForES6AndHigher(node);
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile && node.name) {
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            function emitClassLikeDeclarationForES6AndHigher(node) {
-                var decoratedClassAlias;
-                var isHoistedDeclarationInSystemModule = shouldHoistDeclarationInSystemJsModule(node);
-                var isDecorated = ts.nodeIsDecorated(node);
-                var rewriteAsClassExpression = isDecorated || isHoistedDeclarationInSystemModule;
-                if (node.kind === 221) {
-                    if (rewriteAsClassExpression) {
-                        if (isDecorated && resolver.getNodeCheckFlags(node) & 524288) {
-                            decoratedClassAlias = ts.unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default"));
-                            decoratedClassAliases[ts.getNodeId(node)] = decoratedClassAlias;
-                            write("let " + decoratedClassAlias + ";");
-                            writeLine();
-                        }
-                        if (isES6ExportedDeclaration(node) && !(node.flags & 512)) {
-                            write("export ");
-                        }
-                        if (!isHoistedDeclarationInSystemModule) {
-                            write("let ");
-                        }
-                        emitDeclarationName(node);
-                        if (decoratedClassAlias !== undefined) {
-                            write(" = " + decoratedClassAlias);
-                        }
-                        write(" = ");
-                    }
-                    else if (isES6ExportedDeclaration(node)) {
-                        write("export ");
-                        if (node.flags & 512) {
-                            write("default ");
-                        }
-                    }
-                }
-                var staticProperties = getInitializedProperties(node, true);
-                var isClassExpressionWithStaticProperties = staticProperties.length > 0 && node.kind === 192;
-                var tempVariable;
-                if (isClassExpressionWithStaticProperties) {
-                    tempVariable = createAndRecordTempVariable(0);
-                    write("(");
-                    increaseIndent();
-                    emit(tempVariable);
-                    write(" = ");
-                }
-                write("class");
-                if (node.name || (node.flags & 512 && (staticProperties.length > 0 || modulekind !== ts.ModuleKind.ES6) && !rewriteAsClassExpression)) {
-                    write(" ");
-                    emitDeclarationName(node);
-                }
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-                if (baseTypeNode) {
-                    write(" extends ");
-                    emit(baseTypeNode.expression);
-                }
-                write(" {");
-                increaseIndent();
-                writeLine();
-                emitConstructor(node, baseTypeNode);
-                emitMemberFunctionsForES6AndHigher(node);
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.members.end);
-                if (rewriteAsClassExpression) {
-                    decoratedClassAliases[ts.getNodeId(node)] = undefined;
-                    write(";");
-                }
-                if (isClassExpressionWithStaticProperties) {
-                    for (var _a = 0, staticProperties_1 = staticProperties; _a < staticProperties_1.length; _a++) {
-                        var property = staticProperties_1[_a];
-                        write(",");
-                        writeLine();
-                        emitPropertyDeclaration(node, property, tempVariable, true);
-                    }
-                    write(",");
-                    writeLine();
-                    emit(tempVariable);
-                    decreaseIndent();
-                    write(")");
-                }
-                else {
-                    writeLine();
-                    emitPropertyDeclarations(node, staticProperties);
-                    emitDecoratorsOfClass(node, decoratedClassAlias);
-                }
-                if (!(node.flags & 1)) {
-                    return;
-                }
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    emitExportMemberAssignment(node);
-                }
-                else {
-                    if (node.flags & 512) {
-                        if (isDecorated) {
-                            writeLine();
-                            write("export default ");
-                            emitDeclarationName(node);
-                            write(";");
-                        }
-                    }
-                    else if (node.parent.kind !== 256) {
-                        writeLine();
-                        emitStart(node);
-                        emitModuleMemberName(node);
-                        write(" = ");
-                        emitDeclarationName(node);
-                        emitEnd(node);
-                        write(";");
-                    }
-                }
-            }
-            function emitClassLikeDeclarationBelowES6(node) {
-                if (node.kind === 221) {
-                    if (!shouldHoistDeclarationInSystemJsModule(node)) {
-                        write("var ");
-                    }
-                    emitDeclarationName(node);
-                    write(" = ");
-                }
-                write("(function (");
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-                if (baseTypeNode) {
-                    write("_super");
-                }
-                write(") {");
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                var saveComputedPropertyNamesToGeneratedNames = computedPropertyNamesToGeneratedNames;
-                var saveConvertedLoopState = convertedLoopState;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                computedPropertyNamesToGeneratedNames = undefined;
-                increaseIndent();
-                if (baseTypeNode) {
-                    writeLine();
-                    emitStart(baseTypeNode);
-                    write("__extends(");
-                    emitDeclarationName(node);
-                    write(", _super);");
-                    emitEnd(baseTypeNode);
-                }
-                writeLine();
-                emitConstructor(node, baseTypeNode);
-                emitMemberFunctionsForES5AndLower(node);
-                emitPropertyDeclarations(node, getInitializedProperties(node, true));
-                writeLine();
-                emitDecoratorsOfClass(node, undefined);
-                writeLine();
-                emitToken(16, node.members.end, function () {
-                    write("return ");
-                    emitDeclarationName(node);
-                });
-                write(";");
-                emitTempDeclarations(true);
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-                computedPropertyNamesToGeneratedNames = saveComputedPropertyNamesToGeneratedNames;
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.members.end);
-                emitStart(node);
-                write("(");
-                if (baseTypeNode) {
-                    emit(baseTypeNode.expression);
-                }
-                write("))");
-                if (node.kind === 221) {
-                    write(";");
-                }
-                emitEnd(node);
-                if (node.kind === 221) {
-                    emitExportMemberAssignment(node);
-                }
-            }
-            function emitClassMemberPrefix(node, member) {
-                emitDeclarationName(node);
-                if (!(member.flags & 32)) {
-                    write(".prototype");
-                }
-            }
-            function emitDecoratorsOfClass(node, decoratedClassAlias) {
-                emitDecoratorsOfMembers(node, 0);
-                emitDecoratorsOfMembers(node, 32);
-                emitDecoratorsOfConstructor(node, decoratedClassAlias);
-            }
-            function emitDecoratorsOfConstructor(node, decoratedClassAlias) {
-                var decorators = node.decorators;
-                var constructor = ts.getFirstConstructorWithBody(node);
-                var firstParameterDecorator = constructor && ts.forEach(constructor.parameters, function (parameter) { return parameter.decorators; });
-                if (!decorators && !firstParameterDecorator) {
-                    return;
-                }
-                writeLine();
-                emitStart(node.decorators || firstParameterDecorator);
-                emitDeclarationName(node);
-                if (decoratedClassAlias !== undefined) {
-                    write(" = " + decoratedClassAlias);
-                }
-                write(" = __decorate([");
-                increaseIndent();
-                writeLine();
-                var decoratorCount = decorators ? decorators.length : 0;
-                var argumentsWritten = emitList(decorators, 0, decoratorCount, true, false, false, true, function (decorator) { return emit(decorator.expression); });
-                if (firstParameterDecorator) {
-                    argumentsWritten += emitDecoratorsOfParameters(constructor, argumentsWritten > 0);
-                }
-                emitSerializedTypeMetadata(node, argumentsWritten >= 0);
-                decreaseIndent();
-                writeLine();
-                write("], ");
-                emitDeclarationName(node);
-                write(")");
-                emitEnd(node.decorators || firstParameterDecorator);
-                write(";");
-                writeLine();
-            }
-            function emitDecoratorsOfMembers(node, staticFlag) {
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    if ((member.flags & 32) !== staticFlag) {
-                        continue;
-                    }
-                    if (!ts.nodeCanBeDecorated(member)) {
-                        continue;
-                    }
-                    var decorators = void 0;
-                    var functionLikeMember = void 0;
-                    if (ts.isAccessor(member)) {
-                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
-                        if (member !== accessors.firstAccessor) {
-                            continue;
-                        }
-                        decorators = accessors.firstAccessor.decorators;
-                        if (!decorators && accessors.secondAccessor) {
-                            decorators = accessors.secondAccessor.decorators;
-                        }
-                        functionLikeMember = accessors.setAccessor;
-                    }
-                    else {
-                        decorators = member.decorators;
-                        if (member.kind === 147) {
-                            functionLikeMember = member;
-                        }
-                    }
-                    var firstParameterDecorator = functionLikeMember && ts.forEach(functionLikeMember.parameters, function (parameter) { return parameter.decorators; });
-                    if (!decorators && !firstParameterDecorator) {
-                        continue;
-                    }
-                    writeLine();
-                    emitStart(decorators || firstParameterDecorator);
-                    write("__decorate([");
-                    increaseIndent();
-                    writeLine();
-                    var decoratorCount = decorators ? decorators.length : 0;
-                    var argumentsWritten = emitList(decorators, 0, decoratorCount, true, false, false, true, function (decorator) { return emit(decorator.expression); });
-                    if (firstParameterDecorator) {
-                        argumentsWritten += emitDecoratorsOfParameters(functionLikeMember, argumentsWritten > 0);
-                    }
-                    emitSerializedTypeMetadata(member, argumentsWritten > 0);
-                    decreaseIndent();
-                    writeLine();
-                    write("], ");
-                    emitClassMemberPrefix(node, member);
-                    write(", ");
-                    emitExpressionForPropertyName(member.name);
-                    if (languageVersion > 0) {
-                        if (member.kind !== 145) {
-                            write(", null");
-                        }
-                        else {
-                            write(", void 0");
-                        }
-                    }
-                    write(")");
-                    emitEnd(decorators || firstParameterDecorator);
-                    write(";");
-                    writeLine();
-                }
-            }
-            function emitDecoratorsOfParameters(node, leadingComma) {
-                var argumentsWritten = 0;
-                if (node) {
-                    var parameterIndex_1 = 0;
-                    for (var _a = 0, _b = node.parameters; _a < _b.length; _a++) {
-                        var parameter = _b[_a];
-                        if (ts.nodeIsDecorated(parameter)) {
-                            var decorators = parameter.decorators;
-                            argumentsWritten += emitList(decorators, 0, decorators.length, true, false, leadingComma, true, function (decorator) {
-                                write("__param(" + parameterIndex_1 + ", ");
-                                emit(decorator.expression);
-                                write(")");
-                            });
-                            leadingComma = true;
-                        }
-                        parameterIndex_1++;
-                    }
-                }
-                return argumentsWritten;
-            }
-            function shouldEmitTypeMetadata(node) {
-                switch (node.kind) {
-                    case 147:
-                    case 149:
-                    case 150:
-                    case 145:
-                        return true;
-                }
-                return false;
-            }
-            function shouldEmitReturnTypeMetadata(node) {
-                switch (node.kind) {
-                    case 147:
-                        return true;
-                }
-                return false;
-            }
-            function shouldEmitParamTypesMetadata(node) {
-                switch (node.kind) {
-                    case 221:
-                    case 147:
-                    case 150:
-                        return true;
-                }
-                return false;
-            }
-            function emitSerializedTypeOfNode(node) {
-                switch (node.kind) {
-                    case 221:
-                        write("Function");
-                        return;
-                    case 145:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 142:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 149:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 150:
-                        emitSerializedTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
-                        return;
-                }
-                if (ts.isFunctionLike(node)) {
-                    write("Function");
-                    return;
-                }
-                write("void 0");
-            }
-            function emitSerializedTypeNode(node) {
-                if (node) {
-                    switch (node.kind) {
-                        case 103:
-                            write("void 0");
-                            return;
-                        case 164:
-                            emitSerializedTypeNode(node.type);
-                            return;
-                        case 156:
-                        case 157:
-                            write("Function");
-                            return;
-                        case 160:
-                        case 161:
-                            write("Array");
-                            return;
-                        case 154:
-                        case 120:
-                            write("Boolean");
-                            return;
-                        case 132:
-                        case 166:
-                            write("String");
-                            return;
-                        case 130:
-                            write("Number");
-                            return;
-                        case 133:
-                            write("Symbol");
-                            return;
-                        case 155:
-                            emitSerializedTypeReferenceNode(node);
-                            return;
-                        case 158:
-                        case 159:
-                        case 162:
-                        case 163:
-                        case 117:
-                        case 165:
-                            break;
-                        default:
-                            ts.Debug.fail("Cannot serialize unexpected type node.");
-                            break;
-                    }
-                }
-                write("Object");
-            }
-            function emitSerializedTypeReferenceNode(node) {
-                var location = node.parent;
-                while (ts.isDeclaration(location) || ts.isTypeNode(location)) {
-                    location = location.parent;
-                }
-                var typeName = ts.cloneEntityName(node.typeName, location);
-                var result = resolver.getTypeReferenceSerializationKind(typeName);
-                switch (result) {
-                    case ts.TypeReferenceSerializationKind.Unknown:
-                        var temp = createAndRecordTempVariable(0);
-                        write("(typeof (");
-                        emitNodeWithoutSourceMap(temp);
-                        write(" = ");
-                        emitEntityNameAsExpression(typeName, true);
-                        write(") === 'function' && ");
-                        emitNodeWithoutSourceMap(temp);
-                        write(") || Object");
-                        break;
-                    case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
-                        emitEntityNameAsExpression(typeName, false);
-                        break;
-                    case ts.TypeReferenceSerializationKind.VoidType:
-                        write("void 0");
-                        break;
-                    case ts.TypeReferenceSerializationKind.BooleanType:
-                        write("Boolean");
-                        break;
-                    case ts.TypeReferenceSerializationKind.NumberLikeType:
-                        write("Number");
-                        break;
-                    case ts.TypeReferenceSerializationKind.StringLikeType:
-                        write("String");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ArrayLikeType:
-                        write("Array");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ESSymbolType:
-                        if (languageVersion < 2) {
-                            write("typeof Symbol === 'function' ? Symbol : Object");
-                        }
-                        else {
-                            write("Symbol");
-                        }
-                        break;
-                    case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
-                        write("Function");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ObjectType:
-                        write("Object");
-                        break;
-                }
-            }
-            function emitSerializedParameterTypesOfNode(node) {
-                if (node) {
-                    var valueDeclaration = void 0;
-                    if (node.kind === 221) {
-                        valueDeclaration = ts.getFirstConstructorWithBody(node);
-                    }
-                    else if (ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)) {
-                        valueDeclaration = node;
-                    }
-                    if (valueDeclaration) {
-                        var parameters = valueDeclaration.parameters;
-                        var parameterCount = parameters.length;
-                        if (parameterCount > 0) {
-                            for (var i = 0; i < parameterCount; i++) {
-                                if (i > 0) {
-                                    write(", ");
-                                }
-                                if (parameters[i].dotDotDotToken) {
-                                    var parameterType = parameters[i].type;
-                                    if (parameterType.kind === 160) {
-                                        parameterType = parameterType.elementType;
-                                    }
-                                    else if (parameterType.kind === 155 && parameterType.typeArguments && parameterType.typeArguments.length === 1) {
-                                        parameterType = parameterType.typeArguments[0];
-                                    }
-                                    else {
-                                        parameterType = undefined;
-                                    }
-                                    emitSerializedTypeNode(parameterType);
-                                }
-                                else {
-                                    emitSerializedTypeOfNode(parameters[i]);
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            function emitSerializedReturnTypeOfNode(node) {
-                if (node && ts.isFunctionLike(node) && node.type) {
-                    emitSerializedTypeNode(node.type);
-                    return;
-                }
-                write("void 0");
-            }
-            function emitSerializedTypeMetadata(node, writeComma) {
-                var argumentsWritten = 0;
-                if (compilerOptions.emitDecoratorMetadata) {
-                    if (shouldEmitTypeMetadata(node)) {
-                        if (writeComma) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:type', ");
-                        emitSerializedTypeOfNode(node);
-                        write(")");
-                        argumentsWritten++;
-                    }
-                    if (shouldEmitParamTypesMetadata(node)) {
-                        if (writeComma || argumentsWritten) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:paramtypes', [");
-                        emitSerializedParameterTypesOfNode(node);
-                        write("])");
-                        argumentsWritten++;
-                    }
-                    if (shouldEmitReturnTypeMetadata(node)) {
-                        if (writeComma || argumentsWritten) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:returntype', ");
-                        emitSerializedReturnTypeOfNode(node);
-                        write(")");
-                        argumentsWritten++;
-                    }
-                }
-                return argumentsWritten;
-            }
-            function emitInterfaceDeclaration(node) {
-                emitCommentsOnNotEmittedNode(node);
-            }
-            function shouldEmitEnumDeclaration(node) {
-                var isConstEnum = ts.isConst(node);
-                return !isConstEnum || compilerOptions.preserveConstEnums || compilerOptions.isolatedModules;
-            }
-            function emitEnumDeclaration(node) {
-                if (!shouldEmitEnumDeclaration(node)) {
-                    return;
-                }
-                if (!shouldHoistDeclarationInSystemJsModule(node)) {
-                    var isES6ExportedEnum = isES6ExportedDeclaration(node);
-                    if (!(node.flags & 1) || (isES6ExportedEnum && isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 224))) {
-                        emitStart(node);
-                        if (isES6ExportedEnum) {
-                            write("export ");
-                        }
-                        write("var ");
-                        emit(node.name);
-                        emitEnd(node);
-                        write(";");
-                    }
-                }
-                writeLine();
-                emitStart(node);
-                write("(function (");
-                emitStart(node.name);
-                write(getGeneratedNameForNode(node));
-                emitEnd(node.name);
-                write(") {");
-                increaseIndent();
-                emitLines(node.members);
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.members.end);
-                write(")(");
-                emitModuleMemberName(node);
-                write(" || (");
-                emitModuleMemberName(node);
-                write(" = {}));");
-                emitEnd(node);
-                if (!isES6ExportedDeclaration(node) && node.flags & 1 && !shouldHoistDeclarationInSystemJsModule(node)) {
-                    writeLine();
-                    emitStart(node);
-                    write("var ");
-                    emit(node.name);
-                    write(" = ");
-                    emitModuleMemberName(node);
-                    emitEnd(node);
-                    write(";");
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
-                    if (modulekind === ts.ModuleKind.System && (node.flags & 1)) {
-                        writeLine();
-                        write(exportFunctionForFile + "(\"");
-                        emitDeclarationName(node);
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(");");
-                    }
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            function emitEnumMember(node) {
-                var enumParent = node.parent;
-                emitStart(node);
-                write(getGeneratedNameForNode(enumParent));
-                write("[");
-                write(getGeneratedNameForNode(enumParent));
-                write("[");
-                emitExpressionForPropertyName(node.name);
-                write("] = ");
-                writeEnumMemberDeclarationValue(node);
-                write("] = ");
-                emitExpressionForPropertyName(node.name);
-                emitEnd(node);
-                write(";");
-            }
-            function writeEnumMemberDeclarationValue(member) {
-                var value = resolver.getConstantValue(member);
-                if (value !== undefined) {
-                    write(value.toString());
-                    return;
-                }
-                else if (member.initializer) {
-                    emit(member.initializer);
-                }
-                else {
-                    write("undefined");
-                }
-            }
-            function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
-                if (moduleDeclaration.body.kind === 225) {
-                    var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
-                    return recursiveInnerModule || moduleDeclaration.body;
-                }
-            }
-            function shouldEmitModuleDeclaration(node) {
-                return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules);
-            }
-            function isModuleMergedWithES6Class(node) {
-                return languageVersion === 2 && !!(resolver.getNodeCheckFlags(node) & 32768);
-            }
-            function isFirstDeclarationOfKind(node, declarations, kind) {
-                return !ts.forEach(declarations, function (declaration) { return declaration.kind === kind && declaration.pos < node.pos; });
-            }
-            function emitModuleDeclaration(node) {
-                var shouldEmit = shouldEmitModuleDeclaration(node);
-                if (!shouldEmit) {
-                    return emitCommentsOnNotEmittedNode(node);
-                }
-                var hoistedInDeclarationScope = shouldHoistDeclarationInSystemJsModule(node);
-                var emitVarForModule = !hoistedInDeclarationScope && !isModuleMergedWithES6Class(node);
-                if (emitVarForModule) {
-                    var isES6ExportedNamespace = isES6ExportedDeclaration(node);
-                    if (!isES6ExportedNamespace || isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 225)) {
-                        emitStart(node);
-                        if (isES6ExportedNamespace) {
-                            write("export ");
-                        }
-                        write("var ");
-                        emit(node.name);
-                        write(";");
-                        emitEnd(node);
-                        writeLine();
-                    }
-                }
-                emitStart(node);
-                write("(function (");
-                emitStart(node.name);
-                write(getGeneratedNameForNode(node));
-                emitEnd(node.name);
-                write(") ");
-                if (node.body.kind === 226) {
-                    var saveConvertedLoopState = convertedLoopState;
-                    var saveTempFlags = tempFlags;
-                    var saveTempVariables = tempVariables;
-                    convertedLoopState = undefined;
-                    tempFlags = 0;
-                    tempVariables = undefined;
-                    emit(node.body);
-                    ts.Debug.assert(convertedLoopState === undefined);
-                    convertedLoopState = saveConvertedLoopState;
-                    tempFlags = saveTempFlags;
-                    tempVariables = saveTempVariables;
-                }
-                else {
-                    write("{");
-                    increaseIndent();
-                    emitCaptureThisForNodeIfNecessary(node);
-                    writeLine();
-                    emit(node.body);
-                    decreaseIndent();
-                    writeLine();
-                    var moduleBlock = getInnerMostModuleDeclarationFromDottedModule(node).body;
-                    emitToken(16, moduleBlock.statements.end);
-                }
-                write(")(");
-                if ((node.flags & 1) && !isES6ExportedDeclaration(node)) {
-                    emit(node.name);
-                    write(" = ");
-                }
-                emitModuleMemberName(node);
-                write(" || (");
-                emitModuleMemberName(node);
-                write(" = {}));");
-                emitEnd(node);
-                if (!isES6ExportedDeclaration(node) && node.name.kind === 69 && node.parent === currentSourceFile) {
-                    if (modulekind === ts.ModuleKind.System && (node.flags & 1)) {
-                        writeLine();
-                        write(exportFunctionForFile + "(\"");
-                        emitDeclarationName(node);
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(");");
-                    }
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            function tryRenameExternalModule(moduleName) {
-                if (renamedDependencies && ts.hasProperty(renamedDependencies, moduleName.text)) {
-                    return "\"" + renamedDependencies[moduleName.text] + "\"";
-                }
-                return undefined;
-            }
-            function emitRequire(moduleName) {
-                if (moduleName.kind === 9) {
-                    write("require(");
-                    var text = tryRenameExternalModule(moduleName);
-                    if (text) {
-                        write(text);
-                    }
-                    else {
-                        emitStart(moduleName);
-                        emitLiteral(moduleName);
-                        emitEnd(moduleName);
-                    }
-                    emitToken(18, moduleName.end);
-                }
-                else {
-                    write("require()");
-                }
-            }
-            function getNamespaceDeclarationNode(node) {
-                if (node.kind === 229) {
-                    return node;
-                }
-                var importClause = node.importClause;
-                if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232) {
-                    return importClause.namedBindings;
-                }
-            }
-            function isDefaultImport(node) {
-                return node.kind === 230 && node.importClause && !!node.importClause.name;
-            }
-            function emitExportImportAssignments(node) {
-                if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
-                    emitExportMemberAssignments(node.name);
-                }
-                ts.forEachChild(node, emitExportImportAssignments);
-            }
-            function emitImportDeclaration(node) {
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    return emitExternalImportDeclaration(node);
-                }
-                if (node.importClause) {
-                    var shouldEmitDefaultBindings = resolver.isReferencedAliasDeclaration(node.importClause);
-                    var shouldEmitNamedBindings = node.importClause.namedBindings && resolver.isReferencedAliasDeclaration(node.importClause.namedBindings, true);
-                    if (shouldEmitDefaultBindings || shouldEmitNamedBindings) {
-                        write("import ");
-                        emitStart(node.importClause);
-                        if (shouldEmitDefaultBindings) {
-                            emit(node.importClause.name);
-                            if (shouldEmitNamedBindings) {
-                                write(", ");
-                            }
-                        }
-                        if (shouldEmitNamedBindings) {
-                            emitLeadingComments(node.importClause.namedBindings);
-                            emitStart(node.importClause.namedBindings);
-                            if (node.importClause.namedBindings.kind === 232) {
-                                write("* as ");
-                                emit(node.importClause.namedBindings.name);
-                            }
-                            else {
-                                write("{ ");
-                                emitExportOrImportSpecifierList(node.importClause.namedBindings.elements, resolver.isReferencedAliasDeclaration);
-                                write(" }");
-                            }
-                            emitEnd(node.importClause.namedBindings);
-                            emitTrailingComments(node.importClause.namedBindings);
-                        }
-                        emitEnd(node.importClause);
-                        write(" from ");
-                        emit(node.moduleSpecifier);
-                        write(";");
-                    }
-                }
-                else {
-                    write("import ");
-                    emit(node.moduleSpecifier);
-                    write(";");
-                }
-            }
-            function emitExternalImportDeclaration(node) {
-                if (ts.contains(externalImports, node)) {
-                    var isExportedImport = node.kind === 229 && (node.flags & 1) !== 0;
-                    var namespaceDeclaration = getNamespaceDeclarationNode(node);
-                    var varOrConst = (languageVersion <= 1) ? "var " : "const ";
-                    if (modulekind !== ts.ModuleKind.AMD) {
-                        emitLeadingComments(node);
-                        emitStart(node);
-                        if (namespaceDeclaration && !isDefaultImport(node)) {
-                            if (!isExportedImport) {
-                                write(varOrConst);
-                            }
-                            ;
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                        }
-                        else {
-                            var isNakedImport = 230 && !node.importClause;
-                            if (!isNakedImport) {
-                                write(varOrConst);
-                                write(getGeneratedNameForNode(node));
-                                write(" = ");
-                            }
-                        }
-                        emitRequire(ts.getExternalModuleName(node));
-                        if (namespaceDeclaration && isDefaultImport(node)) {
-                            write(", ");
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            write(getGeneratedNameForNode(node));
-                        }
-                        write(";");
-                        emitEnd(node);
-                        emitExportImportAssignments(node);
-                        emitTrailingComments(node);
-                    }
-                    else {
-                        if (isExportedImport) {
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            emit(namespaceDeclaration.name);
-                            write(";");
-                        }
-                        else if (namespaceDeclaration && isDefaultImport(node)) {
-                            write(varOrConst);
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            write(getGeneratedNameForNode(node));
-                            write(";");
-                        }
-                        emitExportImportAssignments(node);
-                    }
-                }
-            }
-            function emitImportEqualsDeclaration(node) {
-                if (ts.isExternalModuleImportEqualsDeclaration(node)) {
-                    emitExternalImportDeclaration(node);
-                    return;
-                }
-                if (resolver.isReferencedAliasDeclaration(node) ||
-                    (!isCurrentFileExternalModule && resolver.isTopLevelValueImportEqualsWithEntityName(node))) {
-                    emitLeadingComments(node);
-                    emitStart(node);
-                    var variableDeclarationIsHoisted = shouldHoistVariable(node, true);
-                    var isExported = isSourceFileLevelDeclarationInSystemJsModule(node, true);
-                    if (!variableDeclarationIsHoisted) {
-                        ts.Debug.assert(!isExported);
-                        if (isES6ExportedDeclaration(node)) {
-                            write("export ");
-                            write("var ");
-                        }
-                        else if (!(node.flags & 1)) {
-                            write("var ");
-                        }
-                    }
-                    if (isExported) {
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithoutSourceMap(node.name);
-                        write("\", ");
-                    }
-                    emitModuleMemberName(node);
-                    write(" = ");
-                    emit(node.moduleReference);
-                    if (isExported) {
-                        write(")");
-                    }
-                    write(";");
-                    emitEnd(node);
-                    emitExportImportAssignments(node);
-                    emitTrailingComments(node);
-                }
-            }
-            function emitExportDeclaration(node) {
-                ts.Debug.assert(modulekind !== ts.ModuleKind.System);
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    if (node.moduleSpecifier && (!node.exportClause || resolver.isValueAliasDeclaration(node))) {
-                        emitStart(node);
-                        var generatedName = getGeneratedNameForNode(node);
-                        if (node.exportClause) {
-                            if (modulekind !== ts.ModuleKind.AMD) {
-                                write("var ");
-                                write(generatedName);
-                                write(" = ");
-                                emitRequire(ts.getExternalModuleName(node));
-                                write(";");
-                            }
-                            for (var _a = 0, _b = node.exportClause.elements; _a < _b.length; _a++) {
-                                var specifier = _b[_a];
-                                if (resolver.isValueAliasDeclaration(specifier)) {
-                                    writeLine();
-                                    emitStart(specifier);
-                                    emitContainingModuleName(specifier);
-                                    write(".");
-                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                                    write(" = ");
-                                    write(generatedName);
-                                    write(".");
-                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.propertyName || specifier.name);
-                                    write(";");
-                                    emitEnd(specifier);
-                                }
-                            }
-                        }
-                        else {
-                            if (hasExportStarsToExportValues && resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
-                                writeLine();
-                                write("__export(");
-                                if (modulekind !== ts.ModuleKind.AMD) {
-                                    emitRequire(ts.getExternalModuleName(node));
-                                }
-                                else {
-                                    write(generatedName);
-                                }
-                                write(");");
-                            }
-                        }
-                        emitEnd(node);
-                    }
-                }
-                else {
-                    if (!node.exportClause || resolver.isValueAliasDeclaration(node)) {
-                        write("export ");
-                        if (node.exportClause) {
-                            write("{ ");
-                            emitExportOrImportSpecifierList(node.exportClause.elements, resolver.isValueAliasDeclaration);
-                            write(" }");
-                        }
-                        else {
-                            write("*");
-                        }
-                        if (node.moduleSpecifier) {
-                            write(" from ");
-                            emit(node.moduleSpecifier);
-                        }
-                        write(";");
-                    }
-                }
-            }
-            function emitExportOrImportSpecifierList(specifiers, shouldEmit) {
-                ts.Debug.assert(modulekind === ts.ModuleKind.ES6);
-                var needsComma = false;
-                for (var _a = 0, specifiers_1 = specifiers; _a < specifiers_1.length; _a++) {
-                    var specifier = specifiers_1[_a];
-                    if (shouldEmit(specifier)) {
-                        if (needsComma) {
-                            write(", ");
-                        }
-                        if (specifier.propertyName) {
-                            emit(specifier.propertyName);
-                            write(" as ");
-                        }
-                        emit(specifier.name);
-                        needsComma = true;
-                    }
-                }
-            }
-            function emitExportAssignment(node) {
-                if (!node.isExportEquals && resolver.isValueAliasDeclaration(node)) {
-                    if (modulekind === ts.ModuleKind.ES6) {
-                        writeLine();
-                        emitStart(node);
-                        write("export default ");
-                        var expression = node.expression;
-                        emit(expression);
-                        if (expression.kind !== 220 &&
-                            expression.kind !== 221) {
-                            write(";");
-                        }
-                        emitEnd(node);
-                    }
-                    else {
-                        writeLine();
-                        emitStart(node);
-                        if (modulekind === ts.ModuleKind.System) {
-                            write(exportFunctionForFile + "(\"default\",");
-                            emit(node.expression);
-                            write(")");
-                        }
-                        else {
-                            emitEs6ExportDefaultCompat(node);
-                            emitContainingModuleName(node);
-                            if (languageVersion === 0) {
-                                write('["default"] = ');
-                            }
-                            else {
-                                write(".default = ");
-                            }
-                            emit(node.expression);
-                        }
-                        write(";");
-                        emitEnd(node);
-                    }
-                }
-            }
-            function collectExternalModuleInfo(sourceFile) {
-                externalImports = [];
-                exportSpecifiers = {};
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                for (var _a = 0, _b = sourceFile.statements; _a < _b.length; _a++) {
-                    var node = _b[_a];
-                    switch (node.kind) {
-                        case 230:
-                            if (!node.importClause ||
-                                resolver.isReferencedAliasDeclaration(node.importClause, true)) {
-                                externalImports.push(node);
-                            }
-                            break;
-                        case 229:
-                            if (node.moduleReference.kind === 240 && resolver.isReferencedAliasDeclaration(node)) {
-                                externalImports.push(node);
-                            }
-                            break;
-                        case 236:
-                            if (node.moduleSpecifier) {
-                                if (!node.exportClause) {
-                                    if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
-                                        externalImports.push(node);
-                                        hasExportStarsToExportValues = true;
-                                    }
-                                }
-                                else if (resolver.isValueAliasDeclaration(node)) {
-                                    externalImports.push(node);
-                                }
-                            }
-                            else {
-                                for (var _c = 0, _d = node.exportClause.elements; _c < _d.length; _c++) {
-                                    var specifier = _d[_c];
-                                    var name_29 = (specifier.propertyName || specifier.name).text;
-                                    (exportSpecifiers[name_29] || (exportSpecifiers[name_29] = [])).push(specifier);
-                                }
-                            }
-                            break;
-                        case 235:
-                            if (node.isExportEquals && !exportEquals) {
-                                exportEquals = node;
-                            }
-                            break;
-                    }
-                }
-            }
-            function emitExportStarHelper() {
-                if (hasExportStarsToExportValues) {
-                    writeLine();
-                    write("function __export(m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function getLocalNameForExternalImport(node) {
-                var namespaceDeclaration = getNamespaceDeclarationNode(node);
-                if (namespaceDeclaration && !isDefaultImport(node)) {
-                    return ts.getTextOfNodeFromSourceText(currentText, namespaceDeclaration.name);
-                }
-                if (node.kind === 230 && node.importClause) {
-                    return getGeneratedNameForNode(node);
-                }
-                if (node.kind === 236 && node.moduleSpecifier) {
-                    return getGeneratedNameForNode(node);
-                }
-            }
-            function getExternalModuleNameText(importNode, emitRelativePathAsModuleName) {
-                if (emitRelativePathAsModuleName) {
-                    var name_30 = getExternalModuleNameFromDeclaration(host, resolver, importNode);
-                    if (name_30) {
-                        return "\"" + name_30 + "\"";
-                    }
-                }
-                var moduleName = ts.getExternalModuleName(importNode);
-                if (moduleName.kind === 9) {
-                    return tryRenameExternalModule(moduleName) || getLiteralText(moduleName);
-                }
-                return undefined;
-            }
-            function emitVariableDeclarationsForImports() {
-                if (externalImports.length === 0) {
-                    return;
-                }
-                writeLine();
-                var started = false;
-                for (var _a = 0, externalImports_1 = externalImports; _a < externalImports_1.length; _a++) {
-                    var importNode = externalImports_1[_a];
-                    var skipNode = importNode.kind === 236 ||
-                        (importNode.kind === 230 && !importNode.importClause);
-                    if (skipNode) {
-                        continue;
-                    }
-                    if (!started) {
-                        write("var ");
-                        started = true;
-                    }
-                    else {
-                        write(", ");
-                    }
-                    write(getLocalNameForExternalImport(importNode));
-                }
-                if (started) {
-                    write(";");
-                }
-            }
-            function emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations) {
-                if (!hasExportStarsToExportValues) {
-                    return undefined;
-                }
-                if (!exportedDeclarations && ts.isEmpty(exportSpecifiers)) {
-                    var hasExportDeclarationWithExportClause = false;
-                    for (var _a = 0, externalImports_2 = externalImports; _a < externalImports_2.length; _a++) {
-                        var externalImport = externalImports_2[_a];
-                        if (externalImport.kind === 236 && externalImport.exportClause) {
-                            hasExportDeclarationWithExportClause = true;
-                            break;
-                        }
-                    }
-                    if (!hasExportDeclarationWithExportClause) {
-                        return emitExportStarFunction(undefined);
-                    }
-                }
-                var exportedNamesStorageRef = makeUniqueName("exportedNames");
-                writeLine();
-                write("var " + exportedNamesStorageRef + " = {");
-                increaseIndent();
-                var started = false;
-                if (exportedDeclarations) {
-                    for (var i = 0; i < exportedDeclarations.length; i++) {
-                        writeExportedName(exportedDeclarations[i]);
-                    }
-                }
-                if (exportSpecifiers) {
-                    for (var n in exportSpecifiers) {
-                        for (var _b = 0, _c = exportSpecifiers[n]; _b < _c.length; _b++) {
-                            var specifier = _c[_b];
-                            writeExportedName(specifier.name);
-                        }
-                    }
-                }
-                for (var _d = 0, externalImports_3 = externalImports; _d < externalImports_3.length; _d++) {
-                    var externalImport = externalImports_3[_d];
-                    if (externalImport.kind !== 236) {
-                        continue;
-                    }
-                    var exportDecl = externalImport;
-                    if (!exportDecl.exportClause) {
-                        continue;
-                    }
-                    for (var _e = 0, _f = exportDecl.exportClause.elements; _e < _f.length; _e++) {
-                        var element = _f[_e];
-                        writeExportedName(element.name || element.propertyName);
-                    }
-                }
-                decreaseIndent();
-                writeLine();
-                write("};");
-                return emitExportStarFunction(exportedNamesStorageRef);
-                function emitExportStarFunction(localNames) {
-                    var exportStarFunction = makeUniqueName("exportStar");
-                    writeLine();
-                    write("function " + exportStarFunction + "(m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("var exports = {};");
-                    writeLine();
-                    write("for(var n in m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("if (n !== \"default\"");
-                    if (localNames) {
-                        write("&& !" + localNames + ".hasOwnProperty(n)");
-                    }
-                    write(") exports[n] = m[n];");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                    writeLine();
-                    write(exportFunctionForFile + "(exports);");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                    return exportStarFunction;
-                }
-                function writeExportedName(node) {
-                    if (node.kind !== 69 && node.flags & 512) {
-                        return;
-                    }
-                    if (started) {
-                        write(",");
-                    }
-                    else {
-                        started = true;
-                    }
-                    writeLine();
-                    write("'");
-                    if (node.kind === 69) {
-                        emitNodeWithCommentsAndWithoutSourcemap(node);
-                    }
-                    else {
-                        emitDeclarationName(node);
-                    }
-                    write("': true");
-                }
-            }
-            function processTopLevelVariableAndFunctionDeclarations(node) {
-                var hoistedVars;
-                var hoistedFunctionDeclarations;
-                var exportedDeclarations;
-                visit(node);
-                if (hoistedVars) {
-                    writeLine();
-                    write("var ");
-                    var seen = {};
-                    for (var i = 0; i < hoistedVars.length; i++) {
-                        var local = hoistedVars[i];
-                        var name_31 = local.kind === 69
-                            ? local
-                            : local.name;
-                        if (name_31) {
-                            var text = ts.unescapeIdentifier(name_31.text);
-                            if (ts.hasProperty(seen, text)) {
-                                continue;
-                            }
-                            else {
-                                seen[text] = text;
-                            }
-                        }
-                        if (i !== 0) {
-                            write(", ");
-                        }
-                        if (local.kind === 221 || local.kind === 225 || local.kind === 224) {
-                            emitDeclarationName(local);
-                        }
-                        else {
-                            emit(local);
-                        }
-                        var flags = ts.getCombinedNodeFlags(local.kind === 69 ? local.parent : local);
-                        if (flags & 1) {
-                            if (!exportedDeclarations) {
-                                exportedDeclarations = [];
-                            }
-                            exportedDeclarations.push(local);
-                        }
-                    }
-                    write(";");
-                }
-                if (hoistedFunctionDeclarations) {
-                    for (var _a = 0, hoistedFunctionDeclarations_1 = hoistedFunctionDeclarations; _a < hoistedFunctionDeclarations_1.length; _a++) {
-                        var f = hoistedFunctionDeclarations_1[_a];
-                        writeLine();
-                        emit(f);
-                        if (f.flags & 1) {
-                            if (!exportedDeclarations) {
-                                exportedDeclarations = [];
-                            }
-                            exportedDeclarations.push(f);
-                        }
-                    }
-                }
-                return exportedDeclarations;
-                function visit(node) {
-                    if (node.flags & 2) {
-                        return;
-                    }
-                    if (node.kind === 220) {
-                        if (!hoistedFunctionDeclarations) {
-                            hoistedFunctionDeclarations = [];
-                        }
-                        hoistedFunctionDeclarations.push(node);
-                        return;
-                    }
-                    if (node.kind === 221) {
-                        if (!hoistedVars) {
-                            hoistedVars = [];
-                        }
-                        hoistedVars.push(node);
-                        return;
-                    }
-                    if (node.kind === 224) {
-                        if (shouldEmitEnumDeclaration(node)) {
-                            if (!hoistedVars) {
-                                hoistedVars = [];
-                            }
-                            hoistedVars.push(node);
-                        }
-                        return;
-                    }
-                    if (node.kind === 225) {
-                        if (shouldEmitModuleDeclaration(node)) {
-                            if (!hoistedVars) {
-                                hoistedVars = [];
-                            }
-                            hoistedVars.push(node);
-                        }
-                        return;
-                    }
-                    if (node.kind === 218 || node.kind === 169) {
-                        if (shouldHoistVariable(node, false)) {
-                            var name_32 = node.name;
-                            if (name_32.kind === 69) {
-                                if (!hoistedVars) {
-                                    hoistedVars = [];
-                                }
-                                hoistedVars.push(name_32);
-                            }
-                            else {
-                                ts.forEachChild(name_32, visit);
-                            }
-                        }
-                        return;
-                    }
-                    if (ts.isInternalModuleImportEqualsDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
-                        if (!hoistedVars) {
-                            hoistedVars = [];
-                        }
-                        hoistedVars.push(node.name);
-                        return;
-                    }
-                    if (ts.isBindingPattern(node)) {
-                        ts.forEach(node.elements, visit);
-                        return;
-                    }
-                    if (!ts.isDeclaration(node)) {
-                        ts.forEachChild(node, visit);
-                    }
-                }
-            }
-            function shouldHoistVariable(node, checkIfSourceFileLevelDecl) {
-                if (checkIfSourceFileLevelDecl && !shouldHoistDeclarationInSystemJsModule(node)) {
-                    return false;
-                }
-                return (ts.getCombinedNodeFlags(node) & 3072) === 0 ||
-                    ts.getEnclosingBlockScopeContainer(node).kind === 256;
-            }
-            function isCurrentFileSystemExternalModule() {
-                return modulekind === ts.ModuleKind.System && isCurrentFileExternalModule;
-            }
-            function emitSystemModuleBody(node, dependencyGroups, startIndex) {
-                emitVariableDeclarationsForImports();
-                writeLine();
-                var exportedDeclarations = processTopLevelVariableAndFunctionDeclarations(node);
-                var exportStarFunction = emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations);
-                writeLine();
-                write("return {");
-                increaseIndent();
-                writeLine();
-                emitSetters(exportStarFunction, dependencyGroups);
-                writeLine();
-                emitExecute(node, startIndex);
-                decreaseIndent();
-                writeLine();
-                write("}");
-                emitTempDeclarations(true);
-            }
-            function emitSetters(exportStarFunction, dependencyGroups) {
-                write("setters:[");
-                for (var i = 0; i < dependencyGroups.length; i++) {
-                    if (i !== 0) {
-                        write(",");
-                    }
-                    writeLine();
-                    increaseIndent();
-                    var group = dependencyGroups[i];
-                    var parameterName = makeUniqueName(ts.forEach(group, getLocalNameForExternalImport) || "");
-                    write("function (" + parameterName + ") {");
-                    increaseIndent();
-                    for (var _a = 0, group_1 = group; _a < group_1.length; _a++) {
-                        var entry = group_1[_a];
-                        var importVariableName = getLocalNameForExternalImport(entry) || "";
-                        switch (entry.kind) {
-                            case 230:
-                                if (!entry.importClause) {
-                                    break;
-                                }
-                            case 229:
-                                ts.Debug.assert(importVariableName !== "");
-                                writeLine();
-                                write(importVariableName + " = " + parameterName + ";");
-                                writeLine();
-                                break;
-                            case 236:
-                                ts.Debug.assert(importVariableName !== "");
-                                if (entry.exportClause) {
-                                    writeLine();
-                                    write(exportFunctionForFile + "({");
-                                    writeLine();
-                                    increaseIndent();
-                                    for (var i_1 = 0, len = entry.exportClause.elements.length; i_1 < len; i_1++) {
-                                        if (i_1 !== 0) {
-                                            write(",");
-                                            writeLine();
-                                        }
-                                        var e = entry.exportClause.elements[i_1];
-                                        write("\"");
-                                        emitNodeWithCommentsAndWithoutSourcemap(e.name);
-                                        write("\": " + parameterName + "[\"");
-                                        emitNodeWithCommentsAndWithoutSourcemap(e.propertyName || e.name);
-                                        write("\"]");
-                                    }
-                                    decreaseIndent();
-                                    writeLine();
-                                    write("});");
-                                }
-                                else {
-                                    writeLine();
-                                    write(exportStarFunction + "(" + parameterName + ");");
-                                }
-                                writeLine();
-                                break;
-                        }
-                    }
-                    decreaseIndent();
-                    write("}");
-                    decreaseIndent();
-                }
-                write("],");
-            }
-            function emitExecute(node, startIndex) {
-                write("execute: function() {");
-                increaseIndent();
-                writeLine();
-                for (var i = startIndex; i < node.statements.length; i++) {
-                    var statement = node.statements[i];
-                    switch (statement.kind) {
-                        case 220:
-                        case 230:
-                            continue;
-                        case 236:
-                            if (!statement.moduleSpecifier) {
-                                for (var _a = 0, _b = statement.exportClause.elements; _a < _b.length; _a++) {
-                                    var element = _b[_a];
-                                    emitExportSpecifierInSystemModule(element);
-                                }
-                            }
-                            continue;
-                        case 229:
-                            if (!ts.isInternalModuleImportEqualsDeclaration(statement)) {
-                                continue;
-                            }
-                        default:
-                            writeLine();
-                            emit(statement);
-                    }
-                }
-                decreaseIndent();
-                writeLine();
-                write("}");
-            }
-            function writeModuleName(node, emitRelativePathAsModuleName) {
-                var moduleName = node.moduleName;
-                if (moduleName || (emitRelativePathAsModuleName && (moduleName = getResolvedExternalModuleName(host, node)))) {
-                    write("\"" + moduleName + "\", ");
-                }
-            }
-            function emitSystemModule(node, emitRelativePathAsModuleName) {
-                collectExternalModuleInfo(node);
-                ts.Debug.assert(!exportFunctionForFile);
-                exportFunctionForFile = makeUniqueName("exports");
-                contextObjectForFile = makeUniqueName("context");
-                writeLine();
-                write("System.register(");
-                writeModuleName(node, emitRelativePathAsModuleName);
-                write("[");
-                var groupIndices = {};
-                var dependencyGroups = [];
-                for (var i = 0; i < externalImports.length; i++) {
-                    var text = getExternalModuleNameText(externalImports[i], emitRelativePathAsModuleName);
-                    if (text === undefined) {
-                        continue;
-                    }
-                    var key = text.substr(1, text.length - 2);
-                    if (ts.hasProperty(groupIndices, key)) {
-                        var groupIndex = groupIndices[key];
-                        dependencyGroups[groupIndex].push(externalImports[i]);
-                        continue;
-                    }
-                    else {
-                        groupIndices[key] = dependencyGroups.length;
-                        dependencyGroups.push([externalImports[i]]);
-                    }
-                    if (i !== 0) {
-                        write(", ");
-                    }
-                    write(text);
-                }
-                write("], function(" + exportFunctionForFile + ", " + contextObjectForFile + ") {");
-                writeLine();
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
-                writeLine();
-                write("var __moduleName = " + contextObjectForFile + " && " + contextObjectForFile + ".id;");
-                writeLine();
-                emitEmitHelpers(node);
-                emitCaptureThisForNodeIfNecessary(node);
-                emitSystemModuleBody(node, dependencyGroups, startIndex);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
-                var aliasedModuleNames = [];
-                var unaliasedModuleNames = [];
-                var importAliasNames = [];
-                for (var _a = 0, _b = node.amdDependencies; _a < _b.length; _a++) {
-                    var amdDependency = _b[_a];
-                    if (amdDependency.name) {
-                        aliasedModuleNames.push('"' + amdDependency.path + '"');
-                        importAliasNames.push(amdDependency.name);
-                    }
-                    else {
-                        unaliasedModuleNames.push('"' + amdDependency.path + '"');
-                    }
-                }
-                for (var _c = 0, externalImports_4 = externalImports; _c < externalImports_4.length; _c++) {
-                    var importNode = externalImports_4[_c];
-                    var externalModuleName = getExternalModuleNameText(importNode, emitRelativePathAsModuleName);
-                    var importAliasName = getLocalNameForExternalImport(importNode);
-                    if (includeNonAmdDependencies && importAliasName) {
-                        aliasedModuleNames.push(externalModuleName);
-                        importAliasNames.push(importAliasName);
-                    }
-                    else {
-                        unaliasedModuleNames.push(externalModuleName);
-                    }
-                }
-                return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
-            }
-            function emitAMDDependencies(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
-                var dependencyNames = getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName);
-                emitAMDDependencyList(dependencyNames);
-                write(", ");
-                emitAMDFactoryHeader(dependencyNames);
-            }
-            function emitAMDDependencyList(_a) {
-                var aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames;
-                write('["require", "exports"');
-                if (aliasedModuleNames.length) {
-                    write(", ");
-                    write(aliasedModuleNames.join(", "));
-                }
-                if (unaliasedModuleNames.length) {
-                    write(", ");
-                    write(unaliasedModuleNames.join(", "));
-                }
-                write("]");
-            }
-            function emitAMDFactoryHeader(_a) {
-                var importAliasNames = _a.importAliasNames;
-                write("function (require, exports");
-                if (importAliasNames.length) {
-                    write(", ");
-                    write(importAliasNames.join(", "));
-                }
-                write(") {");
-            }
-            function emitAMDModule(node, emitRelativePathAsModuleName) {
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                writeLine();
-                write("define(");
-                writeModuleName(node, emitRelativePathAsModuleName);
-                emitAMDDependencies(node, true, emitRelativePathAsModuleName);
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(true);
-                emitTempDeclarations(true);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function emitCommonJSModule(node) {
-                var startIndex = emitDirectivePrologues(node.statements, false, !compilerOptions.noImplicitUseStrict);
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(false);
-                emitTempDeclarations(true);
-            }
-            function emitUMDModule(node) {
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                var dependencyNames = getAMDDependencyNames(node, false);
-                writeLines("(function (factory) {\n    if (typeof module === 'object' && typeof module.exports === 'object') {\n        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n    }\n    else if (typeof define === 'function' && define.amd) {\n        define(");
-                emitAMDDependencyList(dependencyNames);
-                write(", factory);");
-                writeLines("    }\n})(");
-                emitAMDFactoryHeader(dependencyNames);
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(true);
-                emitTempDeclarations(true);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function emitES6Module(node) {
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                var startIndex = emitDirectivePrologues(node.statements, false);
-                emitEmitHelpers(node);
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitTempDeclarations(true);
-            }
-            function emitExportEquals(emitAsReturn) {
-                if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) {
-                    writeLine();
-                    emitStart(exportEquals);
-                    write(emitAsReturn ? "return " : "module.exports = ");
-                    emit(exportEquals.expression);
-                    write(";");
-                    emitEnd(exportEquals);
-                }
-            }
-            function emitJsxElement(node) {
-                switch (compilerOptions.jsx) {
-                    case 2:
-                        jsxEmitReact(node);
-                        break;
-                    case 1:
-                    default:
-                        jsxEmitPreserve(node);
-                        break;
-                }
-            }
-            function trimReactWhitespaceAndApplyEntities(node) {
-                var result = undefined;
-                var text = ts.getTextOfNode(node, true);
-                var firstNonWhitespace = 0;
-                var lastNonWhitespace = -1;
-                for (var i = 0; i < text.length; i++) {
-                    var c = text.charCodeAt(i);
-                    if (ts.isLineBreak(c)) {
-                        if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) {
-                            var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1);
-                            result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
-                        }
-                        firstNonWhitespace = -1;
-                    }
-                    else if (!ts.isWhiteSpace(c)) {
-                        lastNonWhitespace = i;
-                        if (firstNonWhitespace === -1) {
-                            firstNonWhitespace = i;
-                        }
-                    }
-                }
-                if (firstNonWhitespace !== -1) {
-                    var part = text.substr(firstNonWhitespace);
-                    result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
-                }
-                if (result) {
-                    result = result.replace(/&(\w+);/g, function (s, m) {
-                        if (entities[m] !== undefined) {
-                            var ch = String.fromCharCode(entities[m]);
-                            return ch === '"' ? "\\\"" : ch;
-                        }
-                        else {
-                            return s;
-                        }
-                    });
-                }
-                return result;
-            }
-            function isJsxChildEmittable(child) {
-                if (child.kind === 248) {
-                    return !!child.expression;
-                }
-                else if (child.kind === 244) {
-                    return !!getTextToEmit(child);
-                }
-                return true;
-            }
-            ;
-            function getTextToEmit(node) {
-                switch (compilerOptions.jsx) {
-                    case 2:
-                        var text = trimReactWhitespaceAndApplyEntities(node);
-                        if (text === undefined || text.length === 0) {
-                            return undefined;
-                        }
-                        else {
-                            return text;
-                        }
-                    case 1:
-                    default:
-                        return ts.getTextOfNode(node, true);
-                }
-            }
-            function emitJsxText(node) {
-                switch (compilerOptions.jsx) {
-                    case 2:
-                        write('"');
-                        write(trimReactWhitespaceAndApplyEntities(node));
-                        write('"');
-                        break;
-                    case 1:
-                    default:
-                        writer.writeLiteral(ts.getTextOfNode(node, true));
-                        break;
-                }
-            }
-            function emitJsxExpression(node) {
-                if (node.expression) {
-                    switch (compilerOptions.jsx) {
-                        case 1:
-                        default:
-                            write("{");
-                            emit(node.expression);
-                            write("}");
-                            break;
-                        case 2:
-                            emit(node.expression);
-                            break;
-                    }
-                }
-            }
-            function isUseStrictPrologue(node) {
-                return node.expression.text === "use strict";
-            }
-            function ensureUseStrictPrologue(startWithNewLine, writeUseStrict) {
-                if (writeUseStrict) {
-                    if (startWithNewLine) {
-                        writeLine();
-                    }
-                    write("\"use strict\";");
-                }
-            }
-            function emitDirectivePrologues(statements, startWithNewLine, ensureUseStrict) {
-                var foundUseStrict = false;
-                for (var i = 0; i < statements.length; i++) {
-                    if (ts.isPrologueDirective(statements[i])) {
-                        if (isUseStrictPrologue(statements[i])) {
-                            foundUseStrict = true;
-                        }
-                        if (startWithNewLine || i > 0) {
-                            writeLine();
-                        }
-                        emit(statements[i]);
-                    }
-                    else {
-                        ensureUseStrictPrologue(startWithNewLine || i > 0, !foundUseStrict && ensureUseStrict);
-                        return i;
-                    }
-                }
-                ensureUseStrictPrologue(startWithNewLine, !foundUseStrict && ensureUseStrict);
-                return statements.length;
-            }
-            function writeLines(text) {
-                var lines = text.split(/\r\n|\r|\n/g);
-                for (var i = 0; i < lines.length; i++) {
-                    var line = lines[i];
-                    if (line.length) {
-                        writeLine();
-                        write(line);
-                    }
-                }
-            }
-            function emitEmitHelpers(node) {
-                if (!compilerOptions.noEmitHelpers) {
-                    if (languageVersion < 2 && !extendsEmitted && node.flags & 262144) {
-                        writeLines(extendsHelper);
-                        extendsEmitted = true;
-                    }
-                    if (compilerOptions.jsx !== 1 && !assignEmitted && (node.flags & 1073741824)) {
-                        writeLines(assignHelper);
-                        assignEmitted = true;
-                    }
-                    if (!decorateEmitted && node.flags & 524288) {
-                        writeLines(decorateHelper);
-                        if (compilerOptions.emitDecoratorMetadata) {
-                            writeLines(metadataHelper);
-                        }
-                        decorateEmitted = true;
-                    }
-                    if (!paramEmitted && node.flags & 1048576) {
-                        writeLines(paramHelper);
-                        paramEmitted = true;
-                    }
-                    if (!awaiterEmitted && node.flags & 2097152) {
-                        writeLines(awaiterHelper);
-                        awaiterEmitted = true;
-                    }
-                }
-            }
-            function emitSourceFileNode(node) {
-                writeLine();
-                emitShebang();
-                emitDetachedCommentsAndUpdateCommentsInfo(node);
-                if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
-                    if (isOwnFileEmit || (!ts.isExternalModule(node) && compilerOptions.isolatedModules)) {
-                        var emitModule = moduleEmitDelegates[modulekind] || moduleEmitDelegates[ts.ModuleKind.CommonJS];
-                        emitModule(node);
-                    }
-                    else {
-                        bundleEmitDelegates[modulekind](node, true);
-                    }
-                }
-                else {
-                    var startIndex = emitDirectivePrologues(node.statements, false);
-                    externalImports = undefined;
-                    exportSpecifiers = undefined;
-                    exportEquals = undefined;
-                    hasExportStarsToExportValues = false;
-                    emitEmitHelpers(node);
-                    emitCaptureThisForNodeIfNecessary(node);
-                    emitLinesStartingAt(node.statements, startIndex);
-                    emitTempDeclarations(true);
-                }
-                emitLeadingComments(node.endOfFileToken);
-            }
-            function emit(node) {
-                emitNodeConsideringCommentsOption(node, emitNodeWithSourceMap);
-            }
-            function emitNodeWithCommentsAndWithoutSourcemap(node) {
-                emitNodeConsideringCommentsOption(node, emitNodeWithoutSourceMap);
-            }
-            function emitNodeConsideringCommentsOption(node, emitNodeConsideringSourcemap) {
-                if (node) {
-                    if (node.flags & 2) {
-                        return emitCommentsOnNotEmittedNode(node);
-                    }
-                    if (isSpecializedCommentHandling(node)) {
-                        return emitNodeWithoutSourceMap(node);
-                    }
-                    var emitComments_1 = shouldEmitLeadingAndTrailingComments(node);
-                    if (emitComments_1) {
-                        emitLeadingComments(node);
-                    }
-                    emitNodeConsideringSourcemap(node);
-                    if (emitComments_1) {
-                        emitTrailingComments(node);
-                    }
-                }
-            }
-            function emitNodeWithSourceMap(node) {
-                if (node) {
-                    emitStart(node);
-                    emitNodeWithoutSourceMap(node);
-                    emitEnd(node);
-                }
-            }
-            function emitNodeWithoutSourceMap(node) {
-                if (node) {
-                    emitJavaScriptWorker(node);
-                }
-            }
-            function changeSourceMapEmit(writer) {
-                sourceMap = writer;
-                emitStart = writer.emitStart;
-                emitEnd = writer.emitEnd;
-                emitPos = writer.emitPos;
-                setSourceFile = writer.setSourceFile;
-            }
-            function withTemporaryNoSourceMap(callback) {
-                var prevSourceMap = sourceMap;
-                setSourceMapWriterEmit(ts.getNullSourceMapWriter());
-                callback();
-                setSourceMapWriterEmit(prevSourceMap);
-            }
-            function isSpecializedCommentHandling(node) {
-                switch (node.kind) {
-                    case 222:
-                    case 220:
-                    case 230:
-                    case 229:
-                    case 223:
-                    case 235:
-                        return true;
-                }
-            }
-            function shouldEmitLeadingAndTrailingComments(node) {
-                switch (node.kind) {
-                    case 200:
-                        return shouldEmitLeadingAndTrailingCommentsForVariableStatement(node);
-                    case 225:
-                        return shouldEmitModuleDeclaration(node);
-                    case 224:
-                        return shouldEmitEnumDeclaration(node);
-                }
-                ts.Debug.assert(!isSpecializedCommentHandling(node));
-                if (node.kind !== 199 &&
-                    node.parent &&
-                    node.parent.kind === 180 &&
-                    node.parent.body === node &&
-                    languageVersion <= 1) {
-                    return false;
-                }
-                return true;
-            }
-            function emitJavaScriptWorker(node) {
-                switch (node.kind) {
-                    case 69:
-                        return emitIdentifier(node);
-                    case 142:
-                        return emitParameter(node);
-                    case 147:
-                    case 146:
-                        return emitMethod(node);
-                    case 149:
-                    case 150:
-                        return emitAccessor(node);
-                    case 97:
-                        return emitThis(node);
-                    case 95:
-                        return emitSuper(node);
-                    case 93:
-                        return write("null");
-                    case 99:
-                        return write("true");
-                    case 84:
-                        return write("false");
-                    case 8:
-                    case 9:
-                    case 10:
-                    case 11:
-                    case 12:
-                    case 13:
-                    case 14:
-                        return emitLiteral(node);
-                    case 189:
-                        return emitTemplateExpression(node);
-                    case 197:
-                        return emitTemplateSpan(node);
-                    case 241:
-                    case 242:
-                        return emitJsxElement(node);
-                    case 244:
-                        return emitJsxText(node);
-                    case 248:
-                        return emitJsxExpression(node);
-                    case 139:
-                        return emitQualifiedName(node);
-                    case 167:
-                        return emitObjectBindingPattern(node);
-                    case 168:
-                        return emitArrayBindingPattern(node);
-                    case 169:
-                        return emitBindingElement(node);
-                    case 170:
-                        return emitArrayLiteral(node);
-                    case 171:
-                        return emitObjectLiteral(node);
-                    case 253:
-                        return emitPropertyAssignment(node);
-                    case 254:
-                        return emitShorthandPropertyAssignment(node);
-                    case 140:
-                        return emitComputedPropertyName(node);
-                    case 172:
-                        return emitPropertyAccess(node);
-                    case 173:
-                        return emitIndexedAccess(node);
-                    case 174:
-                        return emitCallExpression(node);
-                    case 175:
-                        return emitNewExpression(node);
-                    case 176:
-                        return emitTaggedTemplateExpression(node);
-                    case 177:
-                    case 195:
-                    case 196:
-                        return emit(node.expression);
-                    case 178:
-                        return emitParenExpression(node);
-                    case 220:
-                    case 179:
-                    case 180:
-                        return emitFunctionDeclaration(node);
-                    case 181:
-                        return emitDeleteExpression(node);
-                    case 182:
-                        return emitTypeOfExpression(node);
-                    case 183:
-                        return emitVoidExpression(node);
-                    case 184:
-                        return emitAwaitExpression(node);
-                    case 185:
-                        return emitPrefixUnaryExpression(node);
-                    case 186:
-                        return emitPostfixUnaryExpression(node);
-                    case 187:
-                        return emitBinaryExpression(node);
-                    case 188:
-                        return emitConditionalExpression(node);
-                    case 191:
-                        return emitSpreadElementExpression(node);
-                    case 190:
-                        return emitYieldExpression(node);
-                    case 193:
-                        return;
-                    case 199:
-                    case 226:
-                        return emitBlock(node);
-                    case 200:
-                        return emitVariableStatement(node);
-                    case 201:
-                        return write(";");
-                    case 202:
-                        return emitExpressionStatement(node);
-                    case 203:
-                        return emitIfStatement(node);
-                    case 204:
-                        return emitDoStatement(node);
-                    case 205:
-                        return emitWhileStatement(node);
-                    case 206:
-                        return emitForStatement(node);
-                    case 208:
-                    case 207:
-                        return emitForInOrForOfStatement(node);
-                    case 209:
-                    case 210:
-                        return emitBreakOrContinueStatement(node);
-                    case 211:
-                        return emitReturnStatement(node);
-                    case 212:
-                        return emitWithStatement(node);
-                    case 213:
-                        return emitSwitchStatement(node);
-                    case 249:
-                    case 250:
-                        return emitCaseOrDefaultClause(node);
-                    case 214:
-                        return emitLabeledStatement(node);
-                    case 215:
-                        return emitThrowStatement(node);
-                    case 216:
-                        return emitTryStatement(node);
-                    case 252:
-                        return emitCatchClause(node);
-                    case 217:
-                        return emitDebuggerStatement(node);
-                    case 218:
-                        return emitVariableDeclaration(node);
-                    case 192:
-                        return emitClassExpression(node);
-                    case 221:
-                        return emitClassDeclaration(node);
-                    case 222:
-                        return emitInterfaceDeclaration(node);
-                    case 224:
-                        return emitEnumDeclaration(node);
-                    case 255:
-                        return emitEnumMember(node);
-                    case 225:
-                        return emitModuleDeclaration(node);
-                    case 230:
-                        return emitImportDeclaration(node);
-                    case 229:
-                        return emitImportEqualsDeclaration(node);
-                    case 236:
-                        return emitExportDeclaration(node);
-                    case 235:
-                        return emitExportAssignment(node);
-                    case 256:
-                        return emitSourceFileNode(node);
-                }
-            }
-            function hasDetachedComments(pos) {
-                return detachedCommentsInfo !== undefined && ts.lastOrUndefined(detachedCommentsInfo).nodePos === pos;
-            }
-            function getLeadingCommentsWithoutDetachedComments() {
-                var leadingComments = ts.getLeadingCommentRanges(currentText, ts.lastOrUndefined(detachedCommentsInfo).detachedCommentEndPos);
-                if (detachedCommentsInfo.length - 1) {
-                    detachedCommentsInfo.pop();
-                }
-                else {
-                    detachedCommentsInfo = undefined;
-                }
-                return leadingComments;
-            }
-            function isTripleSlashComment(comment) {
-                if (currentText.charCodeAt(comment.pos + 1) === 47 &&
-                    comment.pos + 2 < comment.end &&
-                    currentText.charCodeAt(comment.pos + 2) === 47) {
-                    var textSubStr = currentText.substring(comment.pos, comment.end);
-                    return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) ||
-                        textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ?
-                        true : false;
-                }
-                return false;
-            }
-            function getLeadingCommentsToEmit(node) {
-                if (node.parent) {
-                    if (node.parent.kind === 256 || node.pos !== node.parent.pos) {
-                        if (hasDetachedComments(node.pos)) {
-                            return getLeadingCommentsWithoutDetachedComments();
-                        }
-                        else {
-                            return ts.getLeadingCommentRangesOfNodeFromText(node, currentText);
-                        }
-                    }
-                }
-            }
-            function getTrailingCommentsToEmit(node) {
-                if (node.parent) {
-                    if (node.parent.kind === 256 || node.end !== node.parent.end) {
-                        return ts.getTrailingCommentRanges(currentText, node.end);
-                    }
-                }
-            }
-            function emitCommentsOnNotEmittedNode(node) {
-                emitLeadingCommentsWorker(node, false);
-            }
-            function emitLeadingComments(node) {
-                return emitLeadingCommentsWorker(node, true);
-            }
-            function emitLeadingCommentsWorker(node, isEmittedNode) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var leadingComments;
-                if (isEmittedNode) {
-                    leadingComments = getLeadingCommentsToEmit(node);
-                }
-                else {
-                    if (node.pos === 0) {
-                        leadingComments = ts.filter(getLeadingCommentsToEmit(node), isTripleSlashComment);
-                    }
-                }
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, node, leadingComments);
-                ts.emitComments(currentText, currentLineMap, writer, leadingComments, true, newLine, writeComment);
-            }
-            function emitTrailingComments(node) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var trailingComments = getTrailingCommentsToEmit(node);
-                ts.emitComments(currentText, currentLineMap, writer, trailingComments, false, newLine, writeComment);
-            }
-            function emitTrailingCommentsOfPosition(pos) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var trailingComments = ts.getTrailingCommentRanges(currentText, pos);
-                ts.emitComments(currentText, currentLineMap, writer, trailingComments, true, newLine, writeComment);
-            }
-            function emitLeadingCommentsOfPositionWorker(pos) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var leadingComments;
-                if (hasDetachedComments(pos)) {
-                    leadingComments = getLeadingCommentsWithoutDetachedComments();
-                }
-                else {
-                    leadingComments = ts.getLeadingCommentRanges(currentText, pos);
-                }
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, { pos: pos, end: pos }, leadingComments);
-                ts.emitComments(currentText, currentLineMap, writer, leadingComments, true, newLine, writeComment);
-            }
-            function emitDetachedCommentsAndUpdateCommentsInfo(node) {
-                var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, node, newLine, compilerOptions.removeComments);
-                if (currentDetachedCommentInfo) {
-                    if (detachedCommentsInfo) {
-                        detachedCommentsInfo.push(currentDetachedCommentInfo);
-                    }
-                    else {
-                        detachedCommentsInfo = [currentDetachedCommentInfo];
-                    }
-                }
-            }
-            function writeComment(text, lineMap, writer, comment, newLine) {
-                emitPos(comment.pos);
-                ts.writeCommentRange(text, lineMap, writer, comment, newLine);
-                emitPos(comment.end);
-            }
-            function emitShebang() {
-                var shebang = ts.getShebang(currentText);
-                if (shebang) {
-                    write(shebang);
-                    writeLine();
-                }
-            }
-            var _a, _b;
-        }
-        function emitFile(_a, sourceFiles, isBundledEmit) {
-            var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath;
-            if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
-                emitJavaScript(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
-            }
-            else {
-                emitSkipped = true;
-            }
-            if (declarationFilePath) {
-                emitSkipped = ts.writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) || emitSkipped;
-            }
-            if (!emitSkipped && emittedFilesList) {
-                emittedFilesList.push(jsFilePath);
-                if (sourceMapFilePath) {
-                    emittedFilesList.push(sourceMapFilePath);
-                }
-                if (declarationFilePath) {
-                    emittedFilesList.push(declarationFilePath);
-                }
-            }
-        }
-    }
-    ts.emitFiles = emitFiles;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.programTime = 0;
-    ts.emitTime = 0;
-    ts.ioReadTime = 0;
-    ts.ioWriteTime = 0;
-    var emptyArray = [];
-    var defaultLibrarySearchPaths = [
-        "types/",
-        "node_modules/",
-        "node_modules/@types/",
-    ];
-    ts.version = "1.9.0";
-    function findConfigFile(searchPath, fileExists) {
-        while (true) {
-            var fileName = ts.combinePaths(searchPath, "tsconfig.json");
-            if (fileExists(fileName)) {
-                return fileName;
-            }
-            var parentPath = ts.getDirectoryPath(searchPath);
-            if (parentPath === searchPath) {
-                break;
-            }
-            searchPath = parentPath;
-        }
-        return undefined;
-    }
-    ts.findConfigFile = findConfigFile;
-    function resolveTripleslashReference(moduleName, containingFile) {
-        var basePath = ts.getDirectoryPath(containingFile);
-        var referencedFileName = ts.isRootedDiskPath(moduleName) ? moduleName : ts.combinePaths(basePath, moduleName);
-        return ts.normalizePath(referencedFileName);
-    }
-    ts.resolveTripleslashReference = resolveTripleslashReference;
-    function computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName) {
-        var commonPathComponents;
-        var failed = ts.forEach(fileNames, function (sourceFile) {
-            var sourcePathComponents = ts.getNormalizedPathComponents(sourceFile, currentDirectory);
-            sourcePathComponents.pop();
-            if (!commonPathComponents) {
-                commonPathComponents = sourcePathComponents;
-                return;
-            }
-            for (var i = 0, n = Math.min(commonPathComponents.length, sourcePathComponents.length); i < n; i++) {
-                if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
-                    if (i === 0) {
-                        return true;
-                    }
-                    commonPathComponents.length = i;
-                    break;
-                }
-            }
-            if (sourcePathComponents.length < commonPathComponents.length) {
-                commonPathComponents.length = sourcePathComponents.length;
-            }
-        });
-        if (failed) {
-            return "";
-        }
-        if (!commonPathComponents) {
-            return currentDirectory;
-        }
-        return ts.getNormalizedPathFromPathComponents(commonPathComponents);
-    }
-    ts.computeCommonSourceDirectoryOfFilenames = computeCommonSourceDirectoryOfFilenames;
-    function trace(host, message) {
-        host.trace(ts.formatMessage.apply(undefined, arguments));
-    }
-    function isTraceEnabled(compilerOptions, host) {
-        return compilerOptions.traceResolution && host.trace !== undefined;
-    }
-    function hasZeroOrOneAsteriskCharacter(str) {
-        var seenAsterisk = false;
-        for (var i = 0; i < str.length; i++) {
-            if (str.charCodeAt(i) === 42) {
-                if (!seenAsterisk) {
-                    seenAsterisk = true;
-                }
-                else {
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-    function createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations) {
-        return { resolvedModule: resolvedFileName ? { resolvedFileName: resolvedFileName, isExternalLibraryImport: isExternalLibraryImport } : undefined, failedLookupLocations: failedLookupLocations };
-    }
-    function moduleHasNonRelativeName(moduleName) {
-        if (ts.isRootedDiskPath(moduleName)) {
-            return false;
-        }
-        var i = moduleName.lastIndexOf("./", 1);
-        var startsWithDotSlashOrDotDotSlash = i === 0 || (i === 1 && moduleName.charCodeAt(0) === 46);
-        return !startsWithDotSlashOrDotDotSlash;
-    }
-    function tryReadTypesSection(packageJsonPath, baseDirectory, state) {
-        var jsonContent;
-        try {
-            var jsonText = state.host.readFile(packageJsonPath);
-            jsonContent = jsonText ? JSON.parse(jsonText) : {};
-        }
-        catch (e) {
-            jsonContent = {};
-        }
-        var typesFile;
-        var fieldName;
-        if (jsonContent.typings) {
-            if (typeof jsonContent.typings === "string") {
-                fieldName = "typings";
-                typesFile = jsonContent.typings;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "typings", typeof jsonContent.typings);
-                }
-            }
-        }
-        if (!typesFile && jsonContent.types) {
-            if (typeof jsonContent.types === "string") {
-                fieldName = "types";
-                typesFile = jsonContent.types;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "types", typeof jsonContent.types);
-                }
-            }
-        }
-        if (typesFile) {
-            var typesFilePath = ts.normalizePath(ts.combinePaths(baseDirectory, typesFile));
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, typesFile, typesFilePath);
-            }
-            return typesFilePath;
-        }
-        return undefined;
-    }
-    var typeReferenceExtensions = [".d.ts"];
-    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
-        var traceEnabled = isTraceEnabled(options, host);
-        var moduleResolutionState = {
-            compilerOptions: options,
-            host: host,
-            skipTsx: true,
-            traceEnabled: traceEnabled
-        };
-        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
-        if (traceEnabled) {
-            if (containingFile === undefined) {
-                if (rootDir === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, rootDir);
-                }
-            }
-            else {
-                if (rootDir === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, rootDir);
-                }
-            }
-        }
-        var failedLookupLocations = [];
-        if (rootDir !== undefined) {
-            var effectivePrimarySearchPaths = options.typesSearchPaths || defaultLibrarySearchPaths;
-            for (var _i = 0, effectivePrimarySearchPaths_1 = effectivePrimarySearchPaths; _i < effectivePrimarySearchPaths_1.length; _i++) {
-                var searchPath = effectivePrimarySearchPaths_1[_i];
-                var primaryPath = ts.combinePaths(rootDir, searchPath);
-                if (traceEnabled) {
-                    trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, primaryPath);
-                }
-                var candidate = ts.combinePaths(primaryPath, typeReferenceDirectiveName);
-                var candidateDirectory = ts.getDirectoryPath(candidate);
-                var resolvedFile_1 = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations, !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
-                if (resolvedFile_1) {
-                    if (traceEnabled) {
-                        trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile_1, true);
-                    }
-                    return {
-                        resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile_1 },
-                        failedLookupLocations: failedLookupLocations
-                    };
-                }
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
-            }
-        }
-        var resolvedFile;
-        var initialLocationForSecondaryLookup;
-        if (containingFile) {
-            initialLocationForSecondaryLookup = ts.getDirectoryPath(containingFile);
-        }
-        else {
-            initialLocationForSecondaryLookup = rootDir;
-        }
-        if (initialLocationForSecondaryLookup !== undefined) {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
-            }
-            resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState);
-            if (traceEnabled) {
-                if (resolvedFile) {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
-                }
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
-            }
-        }
-        return {
-            resolvedTypeReferenceDirective: resolvedFile
-                ? { primary: false, resolvedFileName: resolvedFile }
-                : undefined,
-            failedLookupLocations: failedLookupLocations
-        };
-    }
-    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
-    function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        if (traceEnabled) {
-            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
-        }
-        var moduleResolution = compilerOptions.moduleResolution;
-        if (moduleResolution === undefined) {
-            moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
-            }
-        }
-        var result;
-        switch (moduleResolution) {
-            case ts.ModuleResolutionKind.NodeJs:
-                result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-            case ts.ModuleResolutionKind.Classic:
-                result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-        }
-        if (traceEnabled) {
-            if (result.resolvedModule) {
-                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
-            }
-            else {
-                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
-            }
-        }
-        return result;
-    }
-    ts.resolveModuleName = resolveModuleName;
-    function tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (moduleHasNonRelativeName(moduleName)) {
-            return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
-        }
-        else {
-            return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
-        }
-    }
-    function tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.rootDirs) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
-        }
-        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-        var matchedRootDir;
-        var matchedNormalizedPrefix;
-        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
-            var rootDir = _a[_i];
-            var normalizedRoot = ts.normalizePath(rootDir);
-            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
-                normalizedRoot += ts.directorySeparator;
-            }
-            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
-                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
-            }
-            if (isLongestMatchingPrefix) {
-                matchedNormalizedPrefix = normalizedRoot;
-                matchedRootDir = rootDir;
-            }
-        }
-        if (matchedNormalizedPrefix) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
-            }
-            var suffix = candidate.substr(matchedNormalizedPrefix.length);
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
-            }
-            var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
-            if (resolvedFileName) {
-                return resolvedFileName;
-            }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
-            }
-            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
-                var rootDir = _c[_b];
-                if (rootDir === matchedRootDir) {
-                    continue;
-                }
-                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
-                }
-                var baseDirectory = ts.getDirectoryPath(candidate_1);
-                var resolvedFileName_1 = loader(candidate_1, supportedExtensions, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
-                if (resolvedFileName_1) {
-                    return resolvedFileName_1;
-                }
-            }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
-            }
-        }
-        return undefined;
-    }
-    function tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.baseUrl) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
-        }
-        var longestMatchPrefixLength = -1;
-        var matchedPattern;
-        var matchedStar;
-        if (state.compilerOptions.paths) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
-            }
-            for (var key in state.compilerOptions.paths) {
-                var pattern = key;
-                var indexOfStar = pattern.indexOf("*");
-                if (indexOfStar !== -1) {
-                    var prefix = pattern.substr(0, indexOfStar);
-                    var suffix = pattern.substr(indexOfStar + 1);
-                    if (moduleName.length >= prefix.length + suffix.length &&
-                        ts.startsWith(moduleName, prefix) &&
-                        ts.endsWith(moduleName, suffix)) {
-                        if (prefix.length > longestMatchPrefixLength) {
-                            longestMatchPrefixLength = prefix.length;
-                            matchedPattern = pattern;
-                            matchedStar = moduleName.substr(prefix.length, moduleName.length - suffix.length);
-                        }
-                    }
-                }
-                else if (pattern === moduleName) {
-                    matchedPattern = pattern;
-                    matchedStar = undefined;
-                    break;
-                }
-            }
-        }
-        if (matchedPattern) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPattern);
-            }
-            for (var _i = 0, _a = state.compilerOptions.paths[matchedPattern]; _i < _a.length; _i++) {
-                var subst = _a[_i];
-                var path = matchedStar ? subst.replace("\*", matchedStar) : subst;
-                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
-                }
-                var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
-                if (resolvedFileName) {
-                    return resolvedFileName;
-                }
-            }
-            return undefined;
-        }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
-            }
-            return loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
-        }
-    }
-    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var failedLookupLocations = [];
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: false };
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName, failedLookupLocations, supportedExtensions, state);
-        var isExternalLibraryImport = false;
-        if (!resolvedFileName) {
-            if (moduleHasNonRelativeName(moduleName)) {
-                if (traceEnabled) {
-                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
-                }
-                resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state);
-                isExternalLibraryImport = resolvedFileName !== undefined;
-            }
-            else {
-                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, false, state);
-            }
-        }
-        if (resolvedFileName && host.realpath) {
-            var originalFileName = resolvedFileName;
-            resolvedFileName = ts.normalizePath(host.realpath(resolvedFileName));
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
-            }
-        }
-        return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
-    }
-    ts.nodeModuleNameResolver = nodeModuleNameResolver;
-    function nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state) {
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
-        }
-        var resolvedFileName = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
-        return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
-    }
-    function directoryProbablyExists(directoryName, host) {
-        return !host.directoryExists || host.directoryExists(directoryName);
-    }
-    ts.directoryProbablyExists = directoryProbablyExists;
-    function loadModuleFromFile(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
-        if (!onlyRecordFailures) {
-            var directory = ts.getDirectoryPath(candidate);
-            if (directory) {
-                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
-            }
-        }
-        return ts.forEach(extensions, tryLoad);
-        function tryLoad(ext) {
-            if (ext === ".tsx" && state.skipTsx) {
-                return undefined;
-            }
-            var fileName = ts.fileExtensionIs(candidate, ext) ? candidate : candidate + ext;
-            if (!onlyRecordFailures && state.host.fileExists(fileName)) {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
-                }
-                return fileName;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
-                }
-                failedLookupLocation.push(fileName);
-                return undefined;
-            }
-        }
-    }
-    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocation, onlyRecordFailures, state) {
-        var packageJsonPath = ts.combinePaths(candidate, "package.json");
-        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
-        if (directoryExists && state.host.fileExists(packageJsonPath)) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
-            }
-            var typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
-            if (typesFile) {
-                var result = loadModuleFromFile(typesFile, extensions, failedLookupLocation, !directoryProbablyExists(ts.getDirectoryPath(typesFile), state.host), state);
-                if (result) {
-                    return result;
-                }
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.package_json_does_not_have_types_field);
-                }
-            }
-        }
-        else {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
-            }
-            failedLookupLocation.push(packageJsonPath);
-        }
-        return loadModuleFromFile(ts.combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
-    }
-    function loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) {
-        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
-        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
-        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
-        var result = loadModuleFromFile(candidate, ts.supportedTypeScriptExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
-        }
-        result = loadNodeModuleFromDirectory(ts.supportedTypeScriptExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
-        }
-    }
-    function loadModuleFromNodeModules(moduleName, directory, failedLookupLocations, state) {
-        directory = ts.normalizeSlashes(directory);
-        while (true) {
-            var baseName = ts.getBaseFileName(directory);
-            if (baseName !== "node_modules") {
-                var result = loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) ||
-                    loadModuleFromNodeModulesFolder(ts.combinePaths("@types", moduleName), directory, failedLookupLocations, state);
-                if (result) {
-                    return result;
-                }
-            }
-            var parentPath = ts.getDirectoryPath(directory);
-            if (parentPath === directory) {
-                break;
-            }
-            directory = parentPath;
-        }
-        return undefined;
-    }
-    function classicNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: !compilerOptions.jsx };
-        var failedLookupLocations = [];
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
-        if (resolvedFileName) {
-            return createResolvedModule(resolvedFileName, false, failedLookupLocations);
-        }
-        var referencedSourceFile;
-        if (moduleHasNonRelativeName(moduleName)) {
-            while (true) {
-                var searchName = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, false, state);
-                if (referencedSourceFile) {
-                    break;
-                }
-                var parentPath = ts.getDirectoryPath(containingDirectory);
-                if (parentPath === containingDirectory) {
-                    break;
-                }
-                containingDirectory = parentPath;
-            }
-        }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-            referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, false, state);
-        }
-        return referencedSourceFile
-            ? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations: failedLookupLocations }
-            : { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
-    }
-    ts.classicNameResolver = classicNameResolver;
-    ts.defaultInitCompilerOptions = {
-        module: ts.ModuleKind.CommonJS,
-        target: 1,
-        noImplicitAny: false,
-        sourceMap: false
-    };
-    function createCompilerHost(options, setParentNodes) {
-        var existingDirectories = {};
-        function getCanonicalFileName(fileName) {
-            return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
-        }
-        var unsupportedFileEncodingErrorCode = -2147024809;
-        function getSourceFile(fileName, languageVersion, onError) {
-            var text;
-            try {
-                var start = new Date().getTime();
-                text = ts.sys.readFile(fileName, options.charset);
-                ts.ioReadTime += new Date().getTime() - start;
-            }
-            catch (e) {
-                if (onError) {
-                    onError(e.number === unsupportedFileEncodingErrorCode
-                        ? ts.createCompilerDiagnostic(ts.Diagnostics.Unsupported_file_encoding).messageText
-                        : e.message);
-                }
-                text = "";
-            }
-            return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
-        }
-        function directoryExists(directoryPath) {
-            if (ts.hasProperty(existingDirectories, directoryPath)) {
-                return true;
-            }
-            if (ts.sys.directoryExists(directoryPath)) {
-                existingDirectories[directoryPath] = true;
-                return true;
-            }
-            return false;
-        }
-        function ensureDirectoriesExist(directoryPath) {
-            if (directoryPath.length > ts.getRootLength(directoryPath) && !directoryExists(directoryPath)) {
-                var parentDirectory = ts.getDirectoryPath(directoryPath);
-                ensureDirectoriesExist(parentDirectory);
-                ts.sys.createDirectory(directoryPath);
-            }
-        }
-        var outputFingerprints;
-        function writeFileIfUpdated(fileName, data, writeByteOrderMark) {
-            if (!outputFingerprints) {
-                outputFingerprints = {};
-            }
-            var hash = ts.sys.createHash(data);
-            var mtimeBefore = ts.sys.getModifiedTime(fileName);
-            if (mtimeBefore && ts.hasProperty(outputFingerprints, fileName)) {
-                var fingerprint = outputFingerprints[fileName];
-                if (fingerprint.byteOrderMark === writeByteOrderMark &&
-                    fingerprint.hash === hash &&
-                    fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
-                    return;
-                }
-            }
-            ts.sys.writeFile(fileName, data, writeByteOrderMark);
-            var mtimeAfter = ts.sys.getModifiedTime(fileName);
-            outputFingerprints[fileName] = {
-                hash: hash,
-                byteOrderMark: writeByteOrderMark,
-                mtime: mtimeAfter
-            };
-        }
-        function writeFile(fileName, data, writeByteOrderMark, onError) {
-            try {
-                var start = new Date().getTime();
-                ensureDirectoriesExist(ts.getDirectoryPath(ts.normalizePath(fileName)));
-                if (ts.isWatchSet(options) && ts.sys.createHash && ts.sys.getModifiedTime) {
-                    writeFileIfUpdated(fileName, data, writeByteOrderMark);
-                }
-                else {
-                    ts.sys.writeFile(fileName, data, writeByteOrderMark);
-                }
-                ts.ioWriteTime += new Date().getTime() - start;
-            }
-            catch (e) {
-                if (onError) {
-                    onError(e.message);
-                }
-            }
-        }
-        function getDefaultTypeDirectiveNames(rootPath) {
-            var localTypes = ts.combinePaths(rootPath, "types");
-            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
-            var result = [];
-            if (ts.sys.directoryExists(localTypes)) {
-                result = result.concat(ts.sys.getDirectories(localTypes));
-            }
-            if (ts.sys.directoryExists(npmTypes)) {
-                result = result.concat(ts.sys.getDirectories(npmTypes));
-            }
-            return result;
-        }
-        function getDefaultLibLocation() {
-            return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
-        }
-        var newLine = ts.getNewLineCharacter(options);
-        var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
-        return {
-            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
-            getSourceFile: getSourceFile,
-            getDefaultLibLocation: getDefaultLibLocation,
-            getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
-            writeFile: writeFile,
-            getCurrentDirectory: ts.memoize(function () { return ts.sys.getCurrentDirectory(); }),
-            useCaseSensitiveFileNames: function () { return ts.sys.useCaseSensitiveFileNames; },
-            getCanonicalFileName: getCanonicalFileName,
-            getNewLine: function () { return newLine; },
-            fileExists: function (fileName) { return ts.sys.fileExists(fileName); },
-            readFile: function (fileName) { return ts.sys.readFile(fileName); },
-            trace: function (s) { return ts.sys.write(s + newLine); },
-            directoryExists: function (directoryName) { return ts.sys.directoryExists(directoryName); },
-            realpath: realpath
-        };
-    }
-    ts.createCompilerHost = createCompilerHost;
-    function getPreEmitDiagnostics(program, sourceFile, cancellationToken) {
-        var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
-        if (program.getCompilerOptions().declaration) {
-            diagnostics = diagnostics.concat(program.getDeclarationDiagnostics(sourceFile, cancellationToken));
-        }
-        return ts.sortAndDeduplicateDiagnostics(diagnostics);
-    }
-    ts.getPreEmitDiagnostics = getPreEmitDiagnostics;
-    function flattenDiagnosticMessageText(messageText, newLine) {
-        if (typeof messageText === "string") {
-            return messageText;
-        }
-        else {
-            var diagnosticChain = messageText;
-            var result = "";
-            var indent = 0;
-            while (diagnosticChain) {
-                if (indent) {
-                    result += newLine;
-                    for (var i = 0; i < indent; i++) {
-                        result += "  ";
-                    }
-                }
-                result += diagnosticChain.messageText;
-                indent++;
-                diagnosticChain = diagnosticChain.next;
-            }
-            return result;
-        }
-    }
-    ts.flattenDiagnosticMessageText = flattenDiagnosticMessageText;
-    function loadWithLocalCache(names, containingFile, loader) {
-        if (names.length === 0) {
-            return [];
-        }
-        var resolutions = [];
-        var cache = {};
-        for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
-            var name_33 = names_1[_i];
-            var result = void 0;
-            if (ts.hasProperty(cache, name_33)) {
-                result = cache[name_33];
-            }
-            else {
-                result = loader(name_33, containingFile);
-                cache[name_33] = result;
-            }
-            resolutions.push(result);
-        }
-        return resolutions;
-    }
-    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
-        if (options.types) {
-            return options.types;
-        }
-        if (host && host.getDefaultTypeDirectiveNames) {
-            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
-            if (commonRoot) {
-                return host.getDefaultTypeDirectiveNames(commonRoot);
-            }
-        }
-        return undefined;
-    }
-    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
-    function createProgram(rootNames, options, host, oldProgram) {
-        var program;
-        var files = [];
-        var commonSourceDirectory;
-        var diagnosticsProducingTypeChecker;
-        var noDiagnosticsTypeChecker;
-        var classifiableNames;
-        var resolvedTypeReferenceDirectives = {};
-        var fileProcessingDiagnostics = ts.createDiagnosticCollection();
-        var start = new Date().getTime();
-        host = host || createCompilerHost(options);
-        var skipDefaultLib = options.noLib;
-        var programDiagnostics = ts.createDiagnosticCollection();
-        var currentDirectory = host.getCurrentDirectory();
-        var supportedExtensions = ts.getSupportedExtensions(options);
-        var hasEmitBlockingDiagnostics = ts.createFileMap(getCanonicalFileName);
-        var resolveModuleNamesWorker;
-        if (host.resolveModuleNames) {
-            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
-        }
-        else {
-            var loader_1 = function (moduleName, containingFile) { return resolveModuleName(moduleName, containingFile, options, host).resolvedModule; };
-            resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(moduleNames, containingFile, loader_1); };
-        }
-        var resolveTypeReferenceDirectiveNamesWorker;
-        if (host.resolveTypeReferenceDirectives) {
-            resolveTypeReferenceDirectiveNamesWorker = function (typeDirectiveNames, containingFile) { return host.resolveTypeReferenceDirectives(typeDirectiveNames, containingFile); };
-        }
-        else {
-            var loader_2 = function (typesRef, containingFile) { return resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective; };
-            resolveTypeReferenceDirectiveNamesWorker = function (typeReferenceDirectiveNames, containingFile) { return loadWithLocalCache(typeReferenceDirectiveNames, containingFile, loader_2); };
-        }
-        var filesByName = ts.createFileMap();
-        var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
-        if (!tryReuseStructureFromOldProgram()) {
-            ts.forEach(rootNames, function (name) { return processRootFile(name, false); });
-            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
-            if (typeReferences) {
-                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, undefined);
-                for (var i = 0; i < typeReferences.length; i++) {
-                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
-                }
-            }
-            if (!skipDefaultLib) {
-                if (!options.lib) {
-                    processRootFile(host.getDefaultLibFileName(options), true);
-                }
-                else {
-                    var libDirectory_1 = host.getDefaultLibLocation ? host.getDefaultLibLocation() : ts.getDirectoryPath(host.getDefaultLibFileName(options));
-                    ts.forEach(options.lib, function (libFileName) {
-                        processRootFile(ts.combinePaths(libDirectory_1, libFileName), true);
-                    });
-                }
-            }
-        }
-        oldProgram = undefined;
-        program = {
-            getRootFileNames: function () { return rootNames; },
-            getSourceFile: getSourceFile,
-            getSourceFileByPath: getSourceFileByPath,
-            getSourceFiles: function () { return files; },
-            getCompilerOptions: function () { return options; },
-            getSyntacticDiagnostics: getSyntacticDiagnostics,
-            getOptionsDiagnostics: getOptionsDiagnostics,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getSemanticDiagnostics: getSemanticDiagnostics,
-            getDeclarationDiagnostics: getDeclarationDiagnostics,
-            getTypeChecker: getTypeChecker,
-            getClassifiableNames: getClassifiableNames,
-            getDiagnosticsProducingTypeChecker: getDiagnosticsProducingTypeChecker,
-            getCommonSourceDirectory: getCommonSourceDirectory,
-            emit: emit,
-            getCurrentDirectory: function () { return currentDirectory; },
-            getNodeCount: function () { return getDiagnosticsProducingTypeChecker().getNodeCount(); },
-            getIdentifierCount: function () { return getDiagnosticsProducingTypeChecker().getIdentifierCount(); },
-            getSymbolCount: function () { return getDiagnosticsProducingTypeChecker().getSymbolCount(); },
-            getTypeCount: function () { return getDiagnosticsProducingTypeChecker().getTypeCount(); },
-            getFileProcessingDiagnostics: function () { return fileProcessingDiagnostics; },
-            getResolvedTypeReferenceDirectives: function () { return resolvedTypeReferenceDirectives; }
-        };
-        verifyCompilerOptions();
-        ts.programTime += new Date().getTime() - start;
-        return program;
-        function getCommonSourceDirectory() {
-            if (typeof commonSourceDirectory === "undefined") {
-                if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
-                    commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
-                }
-                else {
-                    commonSourceDirectory = computeCommonSourceDirectory(files);
-                }
-                if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
-                    commonSourceDirectory += ts.directorySeparator;
-                }
-            }
-            return commonSourceDirectory;
-        }
-        function getClassifiableNames() {
-            if (!classifiableNames) {
-                getTypeChecker();
-                classifiableNames = {};
-                for (var _i = 0, files_3 = files; _i < files_3.length; _i++) {
-                    var sourceFile = files_3[_i];
-                    ts.copyMap(sourceFile.classifiableNames, classifiableNames);
-                }
-            }
-            return classifiableNames;
-        }
-        function tryReuseStructureFromOldProgram() {
-            if (!oldProgram) {
-                return false;
-            }
-            var oldOptions = oldProgram.getCompilerOptions();
-            if ((oldOptions.module !== options.module) ||
-                (oldOptions.noResolve !== options.noResolve) ||
-                (oldOptions.target !== options.target) ||
-                (oldOptions.noLib !== options.noLib) ||
-                (oldOptions.jsx !== options.jsx) ||
-                (oldOptions.allowJs !== options.allowJs) ||
-                (oldOptions.rootDir !== options.rootDir) ||
-                (oldOptions.typesSearchPaths !== options.typesSearchPaths) ||
-                (oldOptions.configFilePath !== options.configFilePath) ||
-                (oldOptions.baseUrl !== options.baseUrl) ||
-                (oldOptions.typesRoot !== options.typesRoot) ||
-                !ts.arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
-                !ts.mapIsEqualTo(oldOptions.paths, options.paths)) {
-                return false;
-            }
-            ts.Debug.assert(!oldProgram.structureIsReused);
-            var oldRootNames = oldProgram.getRootFileNames();
-            if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
-                return false;
-            }
-            if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
-                return false;
-            }
-            var newSourceFiles = [];
-            var filePaths = [];
-            var modifiedSourceFiles = [];
-            for (var _i = 0, _a = oldProgram.getSourceFiles(); _i < _a.length; _i++) {
-                var oldSourceFile = _a[_i];
-                var newSourceFile = host.getSourceFileByPath
-                    ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target)
-                    : host.getSourceFile(oldSourceFile.fileName, options.target);
-                if (!newSourceFile) {
-                    return false;
-                }
-                newSourceFile.path = oldSourceFile.path;
-                filePaths.push(newSourceFile.path);
-                if (oldSourceFile !== newSourceFile) {
-                    if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
-                        return false;
-                    }
-                    if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
-                        return false;
-                    }
-                    collectExternalModuleReferences(newSourceFile);
-                    if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
-                        return false;
-                    }
-                    if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
-                        return false;
-                    }
-                    if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
-                        return false;
-                    }
-                    var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
-                    if (resolveModuleNamesWorker) {
-                        var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
-                        var resolutions = resolveModuleNamesWorker(moduleNames, newSourceFilePath);
-                        var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
-                    }
-                    if (resolveTypeReferenceDirectiveNamesWorker) {
-                        var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
-                        var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
-                        var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
-                    }
-                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
-                    newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
-                    modifiedSourceFiles.push(newSourceFile);
-                }
-                else {
-                    newSourceFile = oldSourceFile;
-                }
-                newSourceFiles.push(newSourceFile);
-            }
-            for (var i = 0, len = newSourceFiles.length; i < len; i++) {
-                filesByName.set(filePaths[i], newSourceFiles[i]);
-            }
-            files = newSourceFiles;
-            fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
-            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
-                var modifiedFile = modifiedSourceFiles_1[_b];
-                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile);
-            }
-            resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
-            oldProgram.structureIsReused = true;
-            return true;
-        }
-        function getEmitHost(writeFileCallback) {
-            return {
-                getCanonicalFileName: getCanonicalFileName,
-                getCommonSourceDirectory: program.getCommonSourceDirectory,
-                getCompilerOptions: program.getCompilerOptions,
-                getCurrentDirectory: function () { return currentDirectory; },
-                getNewLine: function () { return host.getNewLine(); },
-                getSourceFile: program.getSourceFile,
-                getSourceFileByPath: program.getSourceFileByPath,
-                getSourceFiles: program.getSourceFiles,
-                writeFile: writeFileCallback || (function (fileName, data, writeByteOrderMark, onError, sourceFiles) { return host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles); }),
-                isEmitBlocked: isEmitBlocked
-            };
-        }
-        function getDiagnosticsProducingTypeChecker() {
-            return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, true));
-        }
-        function getTypeChecker() {
-            return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, false));
-        }
-        function emit(sourceFile, writeFileCallback, cancellationToken) {
-            var _this = this;
-            return runWithCancellationToken(function () { return emitWorker(_this, sourceFile, writeFileCallback, cancellationToken); });
-        }
-        function isEmitBlocked(emitFileName) {
-            return hasEmitBlockingDiagnostics.contains(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName));
-        }
-        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken) {
-            var declarationDiagnostics = [];
-            if (options.noEmit) {
-                return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
-            }
-            if (options.noEmitOnError) {
-                var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
-                if (diagnostics.length === 0 && program.getCompilerOptions().declaration) {
-                    declarationDiagnostics = program.getDeclarationDiagnostics(undefined, cancellationToken);
-                }
-                if (diagnostics.length > 0 || declarationDiagnostics.length > 0) {
-                    return {
-                        diagnostics: ts.concatenate(diagnostics, declarationDiagnostics),
-                        sourceMaps: undefined,
-                        emittedFiles: undefined,
-                        emitSkipped: true
-                    };
-                }
-            }
-            var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile);
-            var start = new Date().getTime();
-            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile);
-            ts.emitTime += new Date().getTime() - start;
-            return emitResult;
-        }
-        function getSourceFile(fileName) {
-            return getSourceFileByPath(ts.toPath(fileName, currentDirectory, getCanonicalFileName));
-        }
-        function getSourceFileByPath(path) {
-            return filesByName.get(path);
-        }
-        function getDiagnosticsHelper(sourceFile, getDiagnostics, cancellationToken) {
-            if (sourceFile) {
-                return getDiagnostics(sourceFile, cancellationToken);
-            }
-            var allDiagnostics = [];
-            ts.forEach(program.getSourceFiles(), function (sourceFile) {
-                if (cancellationToken) {
-                    cancellationToken.throwIfCancellationRequested();
-                }
-                ts.addRange(allDiagnostics, getDiagnostics(sourceFile, cancellationToken));
-            });
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function getSyntacticDiagnostics(sourceFile, cancellationToken) {
-            return getDiagnosticsHelper(sourceFile, getSyntacticDiagnosticsForFile, cancellationToken);
-        }
-        function getSemanticDiagnostics(sourceFile, cancellationToken) {
-            return getDiagnosticsHelper(sourceFile, getSemanticDiagnosticsForFile, cancellationToken);
-        }
-        function getDeclarationDiagnostics(sourceFile, cancellationToken) {
-            var options = program.getCompilerOptions();
-            if (!sourceFile || options.out || options.outFile) {
-                return getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
-            }
-            else {
-                return getDiagnosticsHelper(sourceFile, getDeclarationDiagnosticsForFile, cancellationToken);
-            }
-        }
-        function getSyntacticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return sourceFile.parseDiagnostics;
-        }
-        function runWithCancellationToken(func) {
-            try {
-                return func();
-            }
-            catch (e) {
-                if (e instanceof ts.OperationCanceledException) {
-                    noDiagnosticsTypeChecker = undefined;
-                    diagnosticsProducingTypeChecker = undefined;
-                }
-                throw e;
-            }
-        }
-        function getSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var typeChecker = getDiagnosticsProducingTypeChecker();
-                ts.Debug.assert(!!sourceFile.bindDiagnostics);
-                var bindDiagnostics = sourceFile.bindDiagnostics;
-                var checkDiagnostics = ts.isSourceFileJavaScript(sourceFile) ?
-                    getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) :
-                    typeChecker.getDiagnostics(sourceFile, cancellationToken);
-                var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
-                var programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
-                return bindDiagnostics.concat(checkDiagnostics).concat(fileProcessingDiagnosticsInFile).concat(programDiagnosticsInFile);
-            });
-        }
-        function getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var diagnostics = [];
-                walk(sourceFile);
-                return diagnostics;
-                function walk(node) {
-                    if (!node) {
-                        return false;
-                    }
-                    switch (node.kind) {
-                        case 229:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 235:
-                            if (node.isExportEquals) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 221:
-                            var classDeclaration = node;
-                            if (checkModifiers(classDeclaration.modifiers) ||
-                                checkTypeParameters(classDeclaration.typeParameters)) {
-                                return true;
-                            }
-                            break;
-                        case 251:
-                            var heritageClause = node;
-                            if (heritageClause.token === 106) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 222:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 225:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 223:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 147:
-                        case 146:
-                        case 148:
-                        case 149:
-                        case 150:
-                        case 179:
-                        case 220:
-                        case 180:
-                        case 220:
-                            var functionDeclaration = node;
-                            if (checkModifiers(functionDeclaration.modifiers) ||
-                                checkTypeParameters(functionDeclaration.typeParameters) ||
-                                checkTypeAnnotation(functionDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 200:
-                            var variableStatement = node;
-                            if (checkModifiers(variableStatement.modifiers)) {
-                                return true;
-                            }
-                            break;
-                        case 218:
-                            var variableDeclaration = node;
-                            if (checkTypeAnnotation(variableDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 174:
-                        case 175:
-                            var expression = node;
-                            if (expression.typeArguments && expression.typeArguments.length > 0) {
-                                var start_2 = expression.typeArguments.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_2, expression.typeArguments.end - start_2, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 142:
-                            var parameter = node;
-                            if (parameter.modifiers) {
-                                var start_3 = parameter.modifiers.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_3, parameter.modifiers.end - start_3, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            if (parameter.questionToken) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
-                                return true;
-                            }
-                            if (parameter.type) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 145:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.property_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 224:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 177:
-                            var typeAssertionExpression = node;
-                            diagnostics.push(ts.createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 143:
-                            if (!options.experimentalDecorators) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
-                            }
-                            return true;
-                    }
-                    return ts.forEachChild(node, walk);
-                }
-                function checkTypeParameters(typeParameters) {
-                    if (typeParameters) {
-                        var start_4 = typeParameters.pos;
-                        diagnostics.push(ts.createFileDiagnostic(sourceFile, start_4, typeParameters.end - start_4, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
-                        return true;
-                    }
-                    return false;
-                }
-                function checkTypeAnnotation(type) {
-                    if (type) {
-                        diagnostics.push(ts.createDiagnosticForNode(type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                        return true;
-                    }
-                    return false;
-                }
-                function checkModifiers(modifiers) {
-                    if (modifiers) {
-                        for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
-                            var modifier = modifiers_1[_i];
-                            switch (modifier.kind) {
-                                case 112:
-                                case 110:
-                                case 111:
-                                case 128:
-                                case 122:
-                                    diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
-                                    return true;
-                                case 113:
-                                case 82:
-                                case 74:
-                                case 77:
-                                case 115:
-                            }
-                        }
-                    }
-                    return false;
-                }
-            });
-        }
-        function getDeclarationDiagnosticsWorker(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
-                var writeFile = function () { };
-                return ts.getDeclarationDiagnostics(getEmitHost(writeFile), resolver, sourceFile);
-            });
-        }
-        function getDeclarationDiagnosticsForFile(sourceFile, cancellationToken) {
-            return ts.isDeclarationFile(sourceFile) ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
-        }
-        function getOptionsDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, fileProcessingDiagnostics.getGlobalDiagnostics());
-            ts.addRange(allDiagnostics, programDiagnostics.getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function getGlobalDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, getDiagnosticsProducingTypeChecker().getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function hasExtension(fileName) {
-            return ts.getBaseFileName(fileName).indexOf(".") >= 0;
-        }
-        function processRootFile(fileName, isDefaultLib) {
-            processSourceFile(ts.normalizePath(fileName), isDefaultLib, true);
-        }
-        function fileReferenceIsEqualTo(a, b) {
-            return a.fileName === b.fileName;
-        }
-        function moduleNameIsEqualTo(a, b) {
-            return a.text === b.text;
-        }
-        function getTextOfLiteral(literal) {
-            return literal.text;
-        }
-        function collectExternalModuleReferences(file) {
-            if (file.imports) {
-                return;
-            }
-            var isJavaScriptFile = ts.isSourceFileJavaScript(file);
-            var isExternalModuleFile = ts.isExternalModule(file);
-            var imports;
-            var moduleAugmentations;
-            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
-                var node = _a[_i];
-                collectModuleReferences(node, false);
-                if (isJavaScriptFile) {
-                    collectRequireCalls(node);
-                }
-            }
-            file.imports = imports || emptyArray;
-            file.moduleAugmentations = moduleAugmentations || emptyArray;
-            return;
-            function collectModuleReferences(node, inAmbientModule) {
-                switch (node.kind) {
-                    case 230:
-                    case 229:
-                    case 236:
-                        var moduleNameExpr = ts.getExternalModuleName(node);
-                        if (!moduleNameExpr || moduleNameExpr.kind !== 9) {
-                            break;
-                        }
-                        if (!moduleNameExpr.text) {
-                            break;
-                        }
-                        if (!inAmbientModule || !ts.isExternalModuleNameRelative(moduleNameExpr.text)) {
-                            (imports || (imports = [])).push(moduleNameExpr);
-                        }
-                        break;
-                    case 225:
-                        if (ts.isAmbientModule(node) && (inAmbientModule || node.flags & 2 || ts.isDeclarationFile(file))) {
-                            var moduleName = node.name;
-                            if (isExternalModuleFile || (inAmbientModule && !ts.isExternalModuleNameRelative(moduleName.text))) {
-                                (moduleAugmentations || (moduleAugmentations = [])).push(moduleName);
-                            }
-                            else if (!inAmbientModule) {
-                                for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
-                                    var statement = _a[_i];
-                                    collectModuleReferences(statement, true);
-                                }
-                            }
-                        }
-                }
-            }
-            function collectRequireCalls(node) {
-                if (ts.isRequireCall(node, true)) {
-                    (imports || (imports = [])).push(node.arguments[0]);
-                }
-                else {
-                    ts.forEachChild(node, collectRequireCalls);
-                }
-            }
-        }
-        function processSourceFile(fileName, isDefaultLib, isReference, refFile, refPos, refEnd) {
-            var diagnosticArgument;
-            var diagnostic;
-            if (hasExtension(fileName)) {
-                if (!options.allowNonTsExtensions && !ts.forEach(supportedExtensions, function (extension) { return ts.fileExtensionIs(host.getCanonicalFileName(fileName), extension); })) {
-                    diagnostic = ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1;
-                    diagnosticArgument = [fileName, "'" + supportedExtensions.join("', '") + "'"];
-                }
-                else if (!findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd)) {
-                    diagnostic = ts.Diagnostics.File_0_not_found;
-                    diagnosticArgument = [fileName];
-                }
-                else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
-                    diagnostic = ts.Diagnostics.A_file_cannot_have_a_reference_to_itself;
-                    diagnosticArgument = [fileName];
-                }
-            }
-            else {
-                var nonTsFile = options.allowNonTsExtensions && findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd);
-                if (!nonTsFile) {
-                    if (options.allowNonTsExtensions) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        diagnosticArgument = [fileName];
-                    }
-                    else if (!ts.forEach(supportedExtensions, function (extension) { return findSourceFile(fileName + extension, ts.toPath(fileName + extension, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd); })) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        fileName += ".ts";
-                        diagnosticArgument = [fileName];
-                    }
-                }
-            }
-            if (diagnostic) {
-                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
-                    fileProcessingDiagnostics.add(ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(diagnosticArgument)));
-                }
-                else {
-                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(diagnosticArgument)));
-                }
-            }
-        }
-        function reportFileNamesDifferOnlyInCasingError(fileName, existingFileName, refFile, refPos, refEnd) {
-            if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
-                fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
-            }
-            else {
-                fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
-            }
-        }
-        function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) {
-            if (filesByName.contains(path)) {
-                var file_1 = filesByName.get(path);
-                if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
-                    reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
-                }
-                return file_1;
-            }
-            var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
-                if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
-                    fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
-                }
-                else {
-                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
-                }
-            });
-            filesByName.set(path, file);
-            if (file) {
-                file.path = path;
-                if (host.useCaseSensitiveFileNames()) {
-                    var existingFile = filesByNameIgnoreCase.get(path);
-                    if (existingFile) {
-                        reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd);
-                    }
-                    else {
-                        filesByNameIgnoreCase.set(path, file);
-                    }
-                }
-                skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
-                var basePath = ts.getDirectoryPath(fileName);
-                if (!options.noResolve) {
-                    processReferencedFiles(file, basePath, isDefaultLib);
-                    processTypeReferenceDirectives(file);
-                }
-                processImportedModules(file, basePath);
-                if (isDefaultLib) {
-                    files.unshift(file);
-                }
-                else {
-                    files.push(file);
-                }
-            }
-            return file;
-        }
-        function processReferencedFiles(file, basePath, isDefaultLib) {
-            ts.forEach(file.referencedFiles, function (ref) {
-                var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
-                processSourceFile(referencedFileName, isDefaultLib, true, file, ref.pos, ref.end);
-            });
-        }
-        function processTypeReferenceDirectives(file) {
-            var typeDirectives = ts.map(file.typeReferenceDirectives, function (l) { return l.fileName; });
-            var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeDirectives, file.fileName);
-            for (var i = 0; i < typeDirectives.length; i++) {
-                var ref = file.typeReferenceDirectives[i];
-                var resolvedTypeReferenceDirective = resolutions[i];
-                ts.setResolvedTypeReferenceDirective(file, ref.fileName, resolvedTypeReferenceDirective);
-                processTypeReferenceDirective(ref.fileName, resolvedTypeReferenceDirective, file, ref.pos, ref.end);
-            }
-        }
-        function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
-            var previousResolution = resolvedTypeReferenceDirectives[typeReferenceDirective];
-            if (previousResolution && previousResolution.primary) {
-                return;
-            }
-            var saveResolution = true;
-            if (resolvedTypeReferenceDirective) {
-                if (resolvedTypeReferenceDirective.primary) {
-                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, true, refFile, refPos, refEnd);
-                }
-                else {
-                    if (previousResolution) {
-                        var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
-                        if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
-                            fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
-                        }
-                        saveResolution = false;
-                    }
-                    else {
-                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, true, refFile, refPos, refEnd);
-                    }
-                }
-            }
-            else {
-                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_name_0, typeReferenceDirective));
-            }
-            if (saveResolution) {
-                resolvedTypeReferenceDirectives[typeReferenceDirective] = resolvedTypeReferenceDirective;
-            }
-        }
-        function createDiagnostic(refFile, refPos, refEnd, message) {
-            var args = [];
-            for (var _i = 4; _i < arguments.length; _i++) {
-                args[_i - 4] = arguments[_i];
-            }
-            if (refFile === undefined || refPos === undefined || refEnd === undefined) {
-                return ts.createCompilerDiagnostic.apply(void 0, [message].concat(args));
-            }
-            else {
-                return ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, message].concat(args));
-            }
-        }
-        function getCanonicalFileName(fileName) {
-            return host.getCanonicalFileName(fileName);
-        }
-        function processImportedModules(file, basePath) {
-            collectExternalModuleReferences(file);
-            if (file.imports.length || file.moduleAugmentations.length) {
-                file.resolvedModules = {};
-                var moduleNames = ts.map(ts.concatenate(file.imports, file.moduleAugmentations), getTextOfLiteral);
-                var resolutions = resolveModuleNamesWorker(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory));
-                for (var i = 0; i < moduleNames.length; i++) {
-                    var resolution = resolutions[i];
-                    ts.setResolvedModule(file, moduleNames[i], resolution);
-                    var shouldAddFile = resolution &&
-                        !options.noResolve &&
-                        i < file.imports.length;
-                    if (shouldAddFile) {
-                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), false, false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
-                    }
-                }
-            }
-            else {
-                file.resolvedModules = undefined;
-            }
-            return;
-        }
-        function computeCommonSourceDirectory(sourceFiles) {
-            var fileNames = [];
-            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
-                var file = sourceFiles_2[_i];
-                if (!file.isDeclarationFile) {
-                    fileNames.push(file.fileName);
-                }
-            }
-            return computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName);
-        }
-        function checkSourceFilesBelongToPath(sourceFiles, rootDirectory) {
-            var allFilesBelongToPath = true;
-            if (sourceFiles) {
-                var absoluteRootDirectoryPath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(rootDirectory, currentDirectory));
-                for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
-                    var sourceFile = sourceFiles_3[_i];
-                    if (!ts.isDeclarationFile(sourceFile)) {
-                        var absoluteSourceFilePath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
-                        if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
-                            programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
-                            allFilesBelongToPath = false;
-                        }
-                    }
-                }
-            }
-            return allFilesBelongToPath;
-        }
-        function verifyCompilerOptions() {
-            if (options.isolatedModules) {
-                if (options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules"));
-                }
-                if (options.noEmitOnError) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules"));
-                }
-                if (options.out) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules"));
-                }
-                if (options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules"));
-                }
-            }
-            if (options.inlineSourceMap) {
-                if (options.sourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap"));
-                }
-                if (options.mapRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap"));
-                }
-            }
-            if (options.paths && options.baseUrl === undefined) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option));
-            }
-            if (options.paths) {
-                for (var key in options.paths) {
-                    if (!ts.hasProperty(options.paths, key)) {
-                        continue;
-                    }
-                    if (!hasZeroOrOneAsteriskCharacter(key)) {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key));
-                    }
-                    if (ts.isArray(options.paths[key])) {
-                        for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
-                            var subst = _a[_i];
-                            var typeOfSubst = typeof subst;
-                            if (typeOfSubst === "string") {
-                                if (!hasZeroOrOneAsteriskCharacter(subst)) {
-                                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key));
-                                }
-                            }
-                            else {
-                                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst));
-                            }
-                        }
-                    }
-                    else {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
-                    }
-                }
-            }
-            if (options.inlineSources) {
-                if (!options.sourceMap && !options.inlineSourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided));
-                }
-                if (options.sourceRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceRoot", "inlineSources"));
-                }
-            }
-            if (options.out && options.outFile) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
-            }
-            if (!options.sourceMap && (options.mapRoot || options.sourceRoot)) {
-                if (options.mapRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
-                }
-                if (options.sourceRoot && !options.inlineSourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "sourceRoot", "sourceMap"));
-                }
-            }
-            if (options.declarationDir) {
-                if (!options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration"));
-                }
-                if (options.out || options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile"));
-                }
-            }
-            if (options.lib && options.noLib) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib"));
-            }
-            var languageVersion = options.target || 0;
-            var outFile = options.outFile || options.out;
-            var firstExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) ? f : undefined; });
-            if (options.isolatedModules) {
-                if (options.module === ts.ModuleKind.None && languageVersion < 2) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
-                }
-                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
-                if (firstNonExternalModuleSourceFile) {
-                    var span = ts.getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
-                    programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
-                }
-            }
-            else if (firstExternalModuleSourceFile && languageVersion < 2 && options.module === ts.ModuleKind.None) {
-                var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
-            }
-            if (options.module === ts.ModuleKind.ES6 && languageVersion < 2) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
-            }
-            if (outFile) {
-                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
-                }
-                else if (options.module === undefined && firstExternalModuleSourceFile) {
-                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
-                }
-            }
-            if (options.outDir ||
-                options.sourceRoot ||
-                options.mapRoot) {
-                var dir = getCommonSourceDirectory();
-                if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files));
-                }
-            }
-            if (!options.noEmit && options.allowJs && options.declaration) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration"));
-            }
-            if (options.emitDecoratorMetadata &&
-                !options.experimentalDecorators) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators"));
-            }
-            if (options.reactNamespace && !ts.isIdentifier(options.reactNamespace, languageVersion)) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace));
-            }
-            if (!options.noEmit && !options.suppressOutputPathCheck) {
-                var emitHost = getEmitHost();
-                var emitFilesSeen_1 = ts.createFileMap(!host.useCaseSensitiveFileNames() ? function (key) { return key.toLocaleLowerCase(); } : undefined);
-                ts.forEachExpectedEmitFile(emitHost, function (emitFileNames, sourceFiles, isBundledEmit) {
-                    verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen_1);
-                    verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
-                });
-            }
-            function verifyEmitFilePath(emitFileName, emitFilesSeen) {
-                if (emitFileName) {
-                    var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName);
-                    if (filesByName.contains(emitFilePath)) {
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file);
-                    }
-                    if (emitFilesSeen.contains(emitFilePath)) {
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files);
-                    }
-                    else {
-                        emitFilesSeen.set(emitFilePath, true);
-                    }
-                }
-            }
-        }
-        function createEmitBlockingDiagnostics(emitFileName, emitFilePath, message) {
-            hasEmitBlockingDiagnostics.set(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName), true);
-            programDiagnostics.add(ts.createCompilerDiagnostic(message, emitFileName));
-        }
-    }
-    ts.createProgram = createProgram;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var BreakpointResolver;
-    (function (BreakpointResolver) {
-        function spanInSourceFileAtLocation(sourceFile, position) {
-            if (sourceFile.isDeclarationFile) {
-                return undefined;
-            }
-            var tokenAtLocation = ts.getTokenAtPosition(sourceFile, position);
-            var lineOfPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
-            if (sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getStart(sourceFile)).line > lineOfPosition) {
-                tokenAtLocation = ts.findPrecedingToken(tokenAtLocation.pos, sourceFile);
-                if (!tokenAtLocation || sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getEnd()).line !== lineOfPosition) {
-                    return undefined;
-                }
-            }
-            if (ts.isInAmbientContext(tokenAtLocation)) {
-                return undefined;
-            }
-            return spanInNode(tokenAtLocation);
-            function textSpan(startNode, endNode) {
-                var start = startNode.decorators ?
-                    ts.skipTrivia(sourceFile.text, startNode.decorators.end) :
-                    startNode.getStart(sourceFile);
-                return ts.createTextSpanFromBounds(start, (endNode || startNode).getEnd());
-            }
-            function textSpanEndingAtNextToken(startNode, previousTokenToFindNextEndToken) {
-                return textSpan(startNode, ts.findNextToken(previousTokenToFindNextEndToken, previousTokenToFindNextEndToken.parent));
-            }
-            function spanInNodeIfStartsOnSameLine(node, otherwiseOnNode) {
-                if (node && lineOfPosition === sourceFile.getLineAndCharacterOfPosition(node.getStart(sourceFile)).line) {
-                    return spanInNode(node);
-                }
-                return spanInNode(otherwiseOnNode);
-            }
-            function spanInNodeArray(nodeArray) {
-                return ts.createTextSpanFromBounds(ts.skipTrivia(sourceFile.text, nodeArray.pos), nodeArray.end);
-            }
-            function spanInPreviousNode(node) {
-                return spanInNode(ts.findPrecedingToken(node.pos, sourceFile));
-            }
-            function spanInNextNode(node) {
-                return spanInNode(ts.findNextToken(node, node.parent));
-            }
-            function spanInNode(node) {
-                if (node) {
-                    switch (node.kind) {
-                        case 200:
-                            return spanInVariableDeclaration(node.declarationList.declarations[0]);
-                        case 218:
-                        case 145:
-                        case 144:
-                            return spanInVariableDeclaration(node);
-                        case 142:
-                            return spanInParameterDeclaration(node);
-                        case 220:
-                        case 147:
-                        case 146:
-                        case 149:
-                        case 150:
-                        case 148:
-                        case 179:
-                        case 180:
-                            return spanInFunctionDeclaration(node);
-                        case 199:
-                            if (ts.isFunctionBlock(node)) {
-                                return spanInFunctionBlock(node);
-                            }
-                        case 226:
-                            return spanInBlock(node);
-                        case 252:
-                            return spanInBlock(node.block);
-                        case 202:
-                            return textSpan(node.expression);
-                        case 211:
-                            return textSpan(node.getChildAt(0), node.expression);
-                        case 205:
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 204:
-                            return spanInNode(node.statement);
-                        case 217:
-                            return textSpan(node.getChildAt(0));
-                        case 203:
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 214:
-                            return spanInNode(node.statement);
-                        case 210:
-                        case 209:
-                            return textSpan(node.getChildAt(0), node.label);
-                        case 206:
-                            return spanInForStatement(node);
-                        case 207:
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 208:
-                            return spanInInitializerOfForLike(node);
-                        case 213:
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 249:
-                        case 250:
-                            return spanInNode(node.statements[0]);
-                        case 216:
-                            return spanInBlock(node.tryBlock);
-                        case 215:
-                            return textSpan(node, node.expression);
-                        case 235:
-                            return textSpan(node, node.expression);
-                        case 229:
-                            return textSpan(node, node.moduleReference);
-                        case 230:
-                            return textSpan(node, node.moduleSpecifier);
-                        case 236:
-                            return textSpan(node, node.moduleSpecifier);
-                        case 225:
-                            if (ts.getModuleInstanceState(node) !== 1) {
-                                return undefined;
-                            }
-                        case 221:
-                        case 224:
-                        case 255:
-                        case 169:
-                            return textSpan(node);
-                        case 212:
-                            return spanInNode(node.statement);
-                        case 143:
-                            return spanInNodeArray(node.parent.decorators);
-                        case 167:
-                        case 168:
-                            return spanInBindingPattern(node);
-                        case 222:
-                        case 223:
-                            return undefined;
-                        case 23:
-                        case 1:
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile));
-                        case 24:
-                            return spanInPreviousNode(node);
-                        case 15:
-                            return spanInOpenBraceToken(node);
-                        case 16:
-                            return spanInCloseBraceToken(node);
-                        case 20:
-                            return spanInCloseBracketToken(node);
-                        case 17:
-                            return spanInOpenParenToken(node);
-                        case 18:
-                            return spanInCloseParenToken(node);
-                        case 54:
-                            return spanInColonToken(node);
-                        case 27:
-                        case 25:
-                            return spanInGreaterThanOrLessThanToken(node);
-                        case 104:
-                            return spanInWhileKeyword(node);
-                        case 80:
-                        case 72:
-                        case 85:
-                            return spanInNextNode(node);
-                        case 138:
-                            return spanInOfKeyword(node);
-                        default:
-                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node)) {
-                                return spanInArrayLiteralOrObjectLiteralDestructuringPattern(node);
-                            }
-                            if ((node.kind === 69 ||
-                                node.kind == 191 ||
-                                node.kind === 253 ||
-                                node.kind === 254) &&
-                                ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
-                                return textSpan(node);
-                            }
-                            if (node.kind === 187) {
-                                var binaryExpression = node;
-                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left)) {
-                                    return spanInArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left);
-                                }
-                                if (binaryExpression.operatorToken.kind === 56 &&
-                                    ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.parent)) {
-                                    return textSpan(node);
-                                }
-                                if (binaryExpression.operatorToken.kind === 24) {
-                                    return spanInNode(binaryExpression.left);
-                                }
-                            }
-                            if (ts.isExpression(node)) {
-                                switch (node.parent.kind) {
-                                    case 204:
-                                        return spanInPreviousNode(node);
-                                    case 143:
-                                        return spanInNode(node.parent);
-                                    case 206:
-                                    case 208:
-                                        return textSpan(node);
-                                    case 187:
-                                        if (node.parent.operatorToken.kind === 24) {
-                                            return textSpan(node);
-                                        }
-                                        break;
-                                    case 180:
-                                        if (node.parent.body === node) {
-                                            return textSpan(node);
-                                        }
-                                        break;
-                                }
-                            }
-                            if (node.parent.kind === 253 &&
-                                node.parent.name === node &&
-                                !ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.parent)) {
-                                return spanInNode(node.parent.initializer);
-                            }
-                            if (node.parent.kind === 177 && node.parent.type === node) {
-                                return spanInNextNode(node.parent.type);
-                            }
-                            if (ts.isFunctionLike(node.parent) && node.parent.type === node) {
-                                return spanInPreviousNode(node);
-                            }
-                            if ((node.parent.kind === 218 ||
-                                node.parent.kind === 142)) {
-                                var paramOrVarDecl = node.parent;
-                                if (paramOrVarDecl.initializer === node ||
-                                    paramOrVarDecl.type === node ||
-                                    ts.isAssignmentOperator(node.kind)) {
-                                    return spanInPreviousNode(node);
-                                }
-                            }
-                            if (node.parent.kind === 187) {
-                                var binaryExpression = node.parent;
-                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left) &&
-                                    (binaryExpression.right === node ||
-                                        binaryExpression.operatorToken === node)) {
-                                    return spanInPreviousNode(node);
-                                }
-                            }
-                            return spanInNode(node.parent);
-                    }
-                }
-                function textSpanFromVariableDeclaration(variableDeclaration) {
-                    var declarations = variableDeclaration.parent.declarations;
-                    if (declarations && declarations[0] === variableDeclaration) {
-                        return textSpan(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent), variableDeclaration);
-                    }
-                    else {
-                        return textSpan(variableDeclaration);
-                    }
-                }
-                function spanInVariableDeclaration(variableDeclaration) {
-                    if (variableDeclaration.parent.parent.kind === 207) {
-                        return spanInNode(variableDeclaration.parent.parent);
-                    }
-                    if (ts.isBindingPattern(variableDeclaration.name)) {
-                        return spanInBindingPattern(variableDeclaration.name);
-                    }
-                    if (variableDeclaration.initializer ||
-                        (variableDeclaration.flags & 1) ||
-                        variableDeclaration.parent.parent.kind === 208) {
-                        return textSpanFromVariableDeclaration(variableDeclaration);
-                    }
-                    var declarations = variableDeclaration.parent.declarations;
-                    if (declarations && declarations[0] !== variableDeclaration) {
-                        return spanInNode(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent));
-                    }
-                }
-                function canHaveSpanInParameterDeclaration(parameter) {
-                    return !!parameter.initializer || parameter.dotDotDotToken !== undefined ||
-                        !!(parameter.flags & 4) || !!(parameter.flags & 8);
-                }
-                function spanInParameterDeclaration(parameter) {
-                    if (ts.isBindingPattern(parameter.name)) {
-                        return spanInBindingPattern(parameter.name);
-                    }
-                    else if (canHaveSpanInParameterDeclaration(parameter)) {
-                        return textSpan(parameter);
-                    }
-                    else {
-                        var functionDeclaration = parameter.parent;
-                        var indexOfParameter = ts.indexOf(functionDeclaration.parameters, parameter);
-                        if (indexOfParameter) {
-                            return spanInParameterDeclaration(functionDeclaration.parameters[indexOfParameter - 1]);
-                        }
-                        else {
-                            return spanInNode(functionDeclaration.body);
-                        }
-                    }
-                }
-                function canFunctionHaveSpanInWholeDeclaration(functionDeclaration) {
-                    return !!(functionDeclaration.flags & 1) ||
-                        (functionDeclaration.parent.kind === 221 && functionDeclaration.kind !== 148);
-                }
-                function spanInFunctionDeclaration(functionDeclaration) {
-                    if (!functionDeclaration.body) {
-                        return undefined;
-                    }
-                    if (canFunctionHaveSpanInWholeDeclaration(functionDeclaration)) {
-                        return textSpan(functionDeclaration);
-                    }
-                    return spanInNode(functionDeclaration.body);
-                }
-                function spanInFunctionBlock(block) {
-                    var nodeForSpanInBlock = block.statements.length ? block.statements[0] : block.getLastToken();
-                    if (canFunctionHaveSpanInWholeDeclaration(block.parent)) {
-                        return spanInNodeIfStartsOnSameLine(block.parent, nodeForSpanInBlock);
-                    }
-                    return spanInNode(nodeForSpanInBlock);
-                }
-                function spanInBlock(block) {
-                    switch (block.parent.kind) {
-                        case 225:
-                            if (ts.getModuleInstanceState(block.parent) !== 1) {
-                                return undefined;
-                            }
-                        case 205:
-                        case 203:
-                        case 207:
-                            return spanInNodeIfStartsOnSameLine(block.parent, block.statements[0]);
-                        case 206:
-                        case 208:
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(block.pos, sourceFile, block.parent), block.statements[0]);
-                    }
-                    return spanInNode(block.statements[0]);
-                }
-                function spanInInitializerOfForLike(forLikeStatement) {
-                    if (forLikeStatement.initializer.kind === 219) {
-                        var variableDeclarationList = forLikeStatement.initializer;
-                        if (variableDeclarationList.declarations.length > 0) {
-                            return spanInNode(variableDeclarationList.declarations[0]);
-                        }
-                    }
-                    else {
-                        return spanInNode(forLikeStatement.initializer);
-                    }
-                }
-                function spanInForStatement(forStatement) {
-                    if (forStatement.initializer) {
-                        return spanInInitializerOfForLike(forStatement);
-                    }
-                    if (forStatement.condition) {
-                        return textSpan(forStatement.condition);
-                    }
-                    if (forStatement.incrementor) {
-                        return textSpan(forStatement.incrementor);
-                    }
-                }
-                function spanInBindingPattern(bindingPattern) {
-                    var firstBindingElement = ts.forEach(bindingPattern.elements, function (element) { return element.kind !== 193 ? element : undefined; });
-                    if (firstBindingElement) {
-                        return spanInNode(firstBindingElement);
-                    }
-                    if (bindingPattern.parent.kind === 169) {
-                        return textSpan(bindingPattern.parent);
-                    }
-                    return textSpanFromVariableDeclaration(bindingPattern.parent);
-                }
-                function spanInArrayLiteralOrObjectLiteralDestructuringPattern(node) {
-                    ts.Debug.assert(node.kind !== 168 && node.kind !== 167);
-                    var elements = node.kind === 170 ?
-                        node.elements :
-                        node.properties;
-                    var firstBindingElement = ts.forEach(elements, function (element) { return element.kind !== 193 ? element : undefined; });
-                    if (firstBindingElement) {
-                        return spanInNode(firstBindingElement);
-                    }
-                    return textSpan(node.parent.kind === 187 ? node.parent : node);
-                }
-                function spanInOpenBraceToken(node) {
-                    switch (node.parent.kind) {
-                        case 224:
-                            var enumDeclaration = node.parent;
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), enumDeclaration.members.length ? enumDeclaration.members[0] : enumDeclaration.getLastToken(sourceFile));
-                        case 221:
-                            var classDeclaration = node.parent;
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), classDeclaration.members.length ? classDeclaration.members[0] : classDeclaration.getLastToken(sourceFile));
-                        case 227:
-                            return spanInNodeIfStartsOnSameLine(node.parent.parent, node.parent.clauses[0]);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInCloseBraceToken(node) {
-                    switch (node.parent.kind) {
-                        case 226:
-                            if (ts.getModuleInstanceState(node.parent.parent) !== 1) {
-                                return undefined;
-                            }
-                        case 224:
-                        case 221:
-                            return textSpan(node);
-                        case 199:
-                            if (ts.isFunctionBlock(node.parent)) {
-                                return textSpan(node);
-                            }
-                        case 252:
-                            return spanInNode(ts.lastOrUndefined(node.parent.statements));
-                        case 227:
-                            var caseBlock = node.parent;
-                            var lastClause = ts.lastOrUndefined(caseBlock.clauses);
-                            if (lastClause) {
-                                return spanInNode(ts.lastOrUndefined(lastClause.statements));
-                            }
-                            return undefined;
-                        case 167:
-                            var bindingPattern = node.parent;
-                            return spanInNode(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
-                        default:
-                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
-                                var objectLiteral = node.parent;
-                                return textSpan(ts.lastOrUndefined(objectLiteral.properties) || objectLiteral);
-                            }
-                            return spanInNode(node.parent);
-                    }
-                }
-                function spanInCloseBracketToken(node) {
-                    switch (node.parent.kind) {
-                        case 168:
-                            var bindingPattern = node.parent;
-                            return textSpan(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
-                        default:
-                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
-                                var arrayLiteral = node.parent;
-                                return textSpan(ts.lastOrUndefined(arrayLiteral.elements) || arrayLiteral);
-                            }
-                            return spanInNode(node.parent);
-                    }
-                }
-                function spanInOpenParenToken(node) {
-                    if (node.parent.kind === 204 ||
-                        node.parent.kind === 174 ||
-                        node.parent.kind === 175) {
-                        return spanInPreviousNode(node);
-                    }
-                    if (node.parent.kind === 178) {
-                        return spanInNextNode(node);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInCloseParenToken(node) {
-                    switch (node.parent.kind) {
-                        case 179:
-                        case 220:
-                        case 180:
-                        case 147:
-                        case 146:
-                        case 149:
-                        case 150:
-                        case 148:
-                        case 205:
-                        case 204:
-                        case 206:
-                        case 208:
-                        case 174:
-                        case 175:
-                        case 178:
-                            return spanInPreviousNode(node);
-                        default:
-                            return spanInNode(node.parent);
-                    }
-                }
-                function spanInColonToken(node) {
-                    if (ts.isFunctionLike(node.parent) ||
-                        node.parent.kind === 253 ||
-                        node.parent.kind === 142) {
-                        return spanInPreviousNode(node);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInGreaterThanOrLessThanToken(node) {
-                    if (node.parent.kind === 177) {
-                        return spanInNextNode(node);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInWhileKeyword(node) {
-                    if (node.parent.kind === 204) {
-                        return textSpanEndingAtNextToken(node, node.parent.expression);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInOfKeyword(node) {
-                    if (node.parent.kind === 208) {
-                        return spanInNextNode(node);
-                    }
-                    return spanInNode(node.parent);
-                }
-            }
-        }
-        BreakpointResolver.spanInSourceFileAtLocation = spanInSourceFileAtLocation;
-    })(BreakpointResolver = ts.BreakpointResolver || (ts.BreakpointResolver = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var OutliningElementsCollector;
-    (function (OutliningElementsCollector) {
-        function collectElements(sourceFile) {
-            var elements = [];
-            var collapseText = "...";
-            function addOutliningSpan(hintSpanNode, startElement, endElement, autoCollapse) {
-                if (hintSpanNode && startElement && endElement) {
-                    var span = {
-                        textSpan: ts.createTextSpanFromBounds(startElement.pos, endElement.end),
-                        hintSpan: ts.createTextSpanFromBounds(hintSpanNode.getStart(), hintSpanNode.end),
-                        bannerText: collapseText,
-                        autoCollapse: autoCollapse
-                    };
-                    elements.push(span);
-                }
-            }
-            function addOutliningSpanComments(commentSpan, autoCollapse) {
-                if (commentSpan) {
-                    var span = {
-                        textSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
-                        hintSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
-                        bannerText: collapseText,
-                        autoCollapse: autoCollapse
-                    };
-                    elements.push(span);
-                }
-            }
-            function addOutliningForLeadingCommentsForNode(n) {
-                var comments = ts.getLeadingCommentRangesOfNode(n, sourceFile);
-                if (comments) {
-                    var firstSingleLineCommentStart = -1;
-                    var lastSingleLineCommentEnd = -1;
-                    var isFirstSingleLineComment = true;
-                    var singleLineCommentCount = 0;
-                    for (var _i = 0, comments_2 = comments; _i < comments_2.length; _i++) {
-                        var currentComment = comments_2[_i];
-                        if (currentComment.kind === 2) {
-                            if (isFirstSingleLineComment) {
-                                firstSingleLineCommentStart = currentComment.pos;
-                            }
-                            isFirstSingleLineComment = false;
-                            lastSingleLineCommentEnd = currentComment.end;
-                            singleLineCommentCount++;
-                        }
-                        else if (currentComment.kind === 3) {
-                            combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
-                            addOutliningSpanComments(currentComment, false);
-                            singleLineCommentCount = 0;
-                            lastSingleLineCommentEnd = -1;
-                            isFirstSingleLineComment = true;
-                        }
-                    }
-                    combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
-                }
-            }
-            function combineAndAddMultipleSingleLineComments(count, start, end) {
-                if (count > 1) {
-                    var multipleSingleLineComments = {
-                        pos: start,
-                        end: end,
-                        kind: 2
-                    };
-                    addOutliningSpanComments(multipleSingleLineComments, false);
-                }
-            }
-            function autoCollapse(node) {
-                return ts.isFunctionBlock(node) && node.parent.kind !== 180;
-            }
-            var depth = 0;
-            var maxDepth = 20;
-            function walk(n) {
-                if (depth > maxDepth) {
-                    return;
-                }
-                if (ts.isDeclaration(n)) {
-                    addOutliningForLeadingCommentsForNode(n);
-                }
-                switch (n.kind) {
-                    case 199:
-                        if (!ts.isFunctionBlock(n)) {
-                            var parent_14 = n.parent;
-                            var openBrace = ts.findChildOfKind(n, 15, sourceFile);
-                            var closeBrace = ts.findChildOfKind(n, 16, sourceFile);
-                            if (parent_14.kind === 204 ||
-                                parent_14.kind === 207 ||
-                                parent_14.kind === 208 ||
-                                parent_14.kind === 206 ||
-                                parent_14.kind === 203 ||
-                                parent_14.kind === 205 ||
-                                parent_14.kind === 212 ||
-                                parent_14.kind === 252) {
-                                addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
-                                break;
-                            }
-                            if (parent_14.kind === 216) {
-                                var tryStatement = parent_14;
-                                if (tryStatement.tryBlock === n) {
-                                    addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
-                                    break;
-                                }
-                                else if (tryStatement.finallyBlock === n) {
-                                    var finallyKeyword = ts.findChildOfKind(tryStatement, 85, sourceFile);
-                                    if (finallyKeyword) {
-                                        addOutliningSpan(finallyKeyword, openBrace, closeBrace, autoCollapse(n));
-                                        break;
-                                    }
-                                }
-                            }
-                            var span = ts.createTextSpanFromBounds(n.getStart(), n.end);
-                            elements.push({
-                                textSpan: span,
-                                hintSpan: span,
-                                bannerText: collapseText,
-                                autoCollapse: autoCollapse(n)
-                            });
-                            break;
-                        }
-                    case 226: {
-                        var openBrace = ts.findChildOfKind(n, 15, sourceFile);
-                        var closeBrace = ts.findChildOfKind(n, 16, sourceFile);
-                        addOutliningSpan(n.parent, openBrace, closeBrace, autoCollapse(n));
-                        break;
-                    }
-                    case 221:
-                    case 222:
-                    case 224:
-                    case 171:
-                    case 227: {
-                        var openBrace = ts.findChildOfKind(n, 15, sourceFile);
-                        var closeBrace = ts.findChildOfKind(n, 16, sourceFile);
-                        addOutliningSpan(n, openBrace, closeBrace, autoCollapse(n));
-                        break;
-                    }
-                    case 170:
-                        var openBracket = ts.findChildOfKind(n, 19, sourceFile);
-                        var closeBracket = ts.findChildOfKind(n, 20, sourceFile);
-                        addOutliningSpan(n, openBracket, closeBracket, autoCollapse(n));
-                        break;
-                }
-                depth++;
-                ts.forEachChild(n, walk);
-                depth--;
-            }
-            walk(sourceFile);
-            return elements;
-        }
-        OutliningElementsCollector.collectElements = collectElements;
-    })(OutliningElementsCollector = ts.OutliningElementsCollector || (ts.OutliningElementsCollector = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var NavigateTo;
-    (function (NavigateTo) {
-        function getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount) {
-            var patternMatcher = ts.createPatternMatcher(searchValue);
-            var rawItems = [];
-            var baseSensitivity = { sensitivity: "base" };
-            ts.forEach(program.getSourceFiles(), function (sourceFile) {
-                cancellationToken.throwIfCancellationRequested();
-                var nameToDeclarations = sourceFile.getNamedDeclarations();
-                for (var name_34 in nameToDeclarations) {
-                    var declarations = ts.getProperty(nameToDeclarations, name_34);
-                    if (declarations) {
-                        var matches = patternMatcher.getMatchesForLastSegmentOfPattern(name_34);
-                        if (!matches) {
-                            continue;
-                        }
-                        for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
-                            var declaration = declarations_7[_i];
-                            if (patternMatcher.patternContainsDots) {
-                                var containers = getContainers(declaration);
-                                if (!containers) {
-                                    return undefined;
-                                }
-                                matches = patternMatcher.getMatches(containers, name_34);
-                                if (!matches) {
-                                    continue;
-                                }
-                            }
-                            var fileName = sourceFile.fileName;
-                            var matchKind = bestMatchKind(matches);
-                            rawItems.push({ name: name_34, fileName: fileName, matchKind: matchKind, isCaseSensitive: allMatchesAreCaseSensitive(matches), declaration: declaration });
-                        }
-                    }
-                }
-            });
-            rawItems = ts.filter(rawItems, function (item) {
-                var decl = item.declaration;
-                if (decl.kind === 231 || decl.kind === 234 || decl.kind === 229) {
-                    var importer = checker.getSymbolAtLocation(decl.name);
-                    var imported = checker.getAliasedSymbol(importer);
-                    return importer.name !== imported.name;
-                }
-                else {
-                    return true;
-                }
-            });
-            rawItems.sort(compareNavigateToItems);
-            if (maxResultCount !== undefined) {
-                rawItems = rawItems.slice(0, maxResultCount);
-            }
-            var items = ts.map(rawItems, createNavigateToItem);
-            return items;
-            function allMatchesAreCaseSensitive(matches) {
-                ts.Debug.assert(matches.length > 0);
-                for (var _i = 0, matches_1 = matches; _i < matches_1.length; _i++) {
-                    var match = matches_1[_i];
-                    if (!match.isCaseSensitive) {
-                        return false;
-                    }
-                }
-                return true;
-            }
-            function getTextOfIdentifierOrLiteral(node) {
-                if (node) {
-                    if (node.kind === 69 ||
-                        node.kind === 9 ||
-                        node.kind === 8) {
-                        return node.text;
-                    }
-                }
-                return undefined;
-            }
-            function tryAddSingleDeclarationName(declaration, containers) {
-                if (declaration && declaration.name) {
-                    var text = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (text !== undefined) {
-                        containers.unshift(text);
-                    }
-                    else if (declaration.name.kind === 140) {
-                        return tryAddComputedPropertyName(declaration.name.expression, containers, true);
-                    }
-                    else {
-                        return false;
-                    }
-                }
-                return true;
-            }
-            function tryAddComputedPropertyName(expression, containers, includeLastPortion) {
-                var text = getTextOfIdentifierOrLiteral(expression);
-                if (text !== undefined) {
-                    if (includeLastPortion) {
-                        containers.unshift(text);
-                    }
-                    return true;
-                }
-                if (expression.kind === 172) {
-                    var propertyAccess = expression;
-                    if (includeLastPortion) {
-                        containers.unshift(propertyAccess.name.text);
-                    }
-                    return tryAddComputedPropertyName(propertyAccess.expression, containers, true);
-                }
-                return false;
-            }
-            function getContainers(declaration) {
-                var containers = [];
-                if (declaration.name.kind === 140) {
-                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, false)) {
-                        return undefined;
-                    }
-                }
-                declaration = ts.getContainerNode(declaration);
-                while (declaration) {
-                    if (!tryAddSingleDeclarationName(declaration, containers)) {
-                        return undefined;
-                    }
-                    declaration = ts.getContainerNode(declaration);
-                }
-                return containers;
-            }
-            function bestMatchKind(matches) {
-                ts.Debug.assert(matches.length > 0);
-                var bestMatchKind = ts.PatternMatchKind.camelCase;
-                for (var _i = 0, matches_2 = matches; _i < matches_2.length; _i++) {
-                    var match = matches_2[_i];
-                    var kind = match.kind;
-                    if (kind < bestMatchKind) {
-                        bestMatchKind = kind;
-                    }
-                }
-                return bestMatchKind;
-            }
-            function compareNavigateToItems(i1, i2) {
-                return i1.matchKind - i2.matchKind ||
-                    i1.name.localeCompare(i2.name, undefined, baseSensitivity) ||
-                    i1.name.localeCompare(i2.name);
-            }
-            function createNavigateToItem(rawItem) {
-                var declaration = rawItem.declaration;
-                var container = ts.getContainerNode(declaration);
-                return {
-                    name: rawItem.name,
-                    kind: ts.getNodeKind(declaration),
-                    kindModifiers: ts.getNodeModifiers(declaration),
-                    matchKind: ts.PatternMatchKind[rawItem.matchKind],
-                    isCaseSensitive: rawItem.isCaseSensitive,
-                    fileName: rawItem.fileName,
-                    textSpan: ts.createTextSpanFromBounds(declaration.getStart(), declaration.getEnd()),
-                    containerName: container && container.name ? container.name.text : "",
-                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
-                };
-            }
-        }
-        NavigateTo.getNavigateToItems = getNavigateToItems;
-    })(NavigateTo = ts.NavigateTo || (ts.NavigateTo = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var NavigationBar;
-    (function (NavigationBar) {
-        function getNavigationBarItems(sourceFile, compilerOptions) {
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                return getJsNavigationBarItems(sourceFile, compilerOptions);
-            }
-            var hasGlobalNode = false;
-            return getItemsWorker(getTopLevelNodes(sourceFile), createTopLevelItem);
-            function getIndent(node) {
-                var indent = hasGlobalNode ? 1 : 0;
-                var current = node.parent;
-                while (current) {
-                    switch (current.kind) {
-                        case 225:
-                            do {
-                                current = current.parent;
-                            } while (current.kind === 225);
-                        case 221:
-                        case 224:
-                        case 222:
-                        case 220:
-                            indent++;
-                    }
-                    current = current.parent;
-                }
-                return indent;
-            }
-            function getChildNodes(nodes) {
-                var childNodes = [];
-                function visit(node) {
-                    switch (node.kind) {
-                        case 200:
-                            ts.forEach(node.declarationList.declarations, visit);
-                            break;
-                        case 167:
-                        case 168:
-                            ts.forEach(node.elements, visit);
-                            break;
-                        case 236:
-                            if (node.exportClause) {
-                                ts.forEach(node.exportClause.elements, visit);
-                            }
-                            break;
-                        case 230:
-                            var importClause = node.importClause;
-                            if (importClause) {
-                                if (importClause.name) {
-                                    childNodes.push(importClause);
-                                }
-                                if (importClause.namedBindings) {
-                                    if (importClause.namedBindings.kind === 232) {
-                                        childNodes.push(importClause.namedBindings);
-                                    }
-                                    else {
-                                        ts.forEach(importClause.namedBindings.elements, visit);
-                                    }
-                                }
-                            }
-                            break;
-                        case 169:
-                        case 218:
-                            if (ts.isBindingPattern(node.name)) {
-                                visit(node.name);
-                                break;
-                            }
-                        case 221:
-                        case 224:
-                        case 222:
-                        case 225:
-                        case 220:
-                        case 229:
-                        case 234:
-                        case 238:
-                            childNodes.push(node);
-                            break;
-                    }
-                }
-                ts.forEach(nodes, visit);
-                return sortNodes(childNodes);
-            }
-            function getTopLevelNodes(node) {
-                var topLevelNodes = [];
-                topLevelNodes.push(node);
-                addTopLevelNodes(node.statements, topLevelNodes);
-                return topLevelNodes;
-            }
-            function sortNodes(nodes) {
-                return nodes.slice(0).sort(function (n1, n2) {
-                    if (n1.name && n2.name) {
-                        return ts.getPropertyNameForPropertyNameNode(n1.name).localeCompare(ts.getPropertyNameForPropertyNameNode(n2.name));
-                    }
-                    else if (n1.name) {
-                        return 1;
-                    }
-                    else if (n2.name) {
-                        return -1;
-                    }
-                    else {
-                        return n1.kind - n2.kind;
-                    }
-                });
-            }
-            function addTopLevelNodes(nodes, topLevelNodes) {
-                nodes = sortNodes(nodes);
-                for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
-                    var node = nodes_4[_i];
-                    switch (node.kind) {
-                        case 221:
-                            topLevelNodes.push(node);
-                            for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                                var member = _b[_a];
-                                if (member.kind === 147 || member.kind === 148) {
-                                    if (member.body) {
-                                        if (hasNamedFunctionDeclarations(member.body.statements)) {
-                                            topLevelNodes.push(member);
-                                        }
-                                        addTopLevelNodes(member.body.statements, topLevelNodes);
-                                    }
-                                }
-                            }
-                            break;
-                        case 224:
-                        case 222:
-                        case 223:
-                            topLevelNodes.push(node);
-                            break;
-                        case 225:
-                            var moduleDeclaration = node;
-                            topLevelNodes.push(node);
-                            addTopLevelNodes(getInnermostModule(moduleDeclaration).body.statements, topLevelNodes);
-                            break;
-                        case 220:
-                            var functionDeclaration = node;
-                            if (isTopLevelFunctionDeclaration(functionDeclaration)) {
-                                topLevelNodes.push(node);
-                                addTopLevelNodes(functionDeclaration.body.statements, topLevelNodes);
-                            }
-                            break;
-                    }
-                }
-            }
-            function hasNamedFunctionDeclarations(nodes) {
-                for (var _i = 0, nodes_5 = nodes; _i < nodes_5.length; _i++) {
-                    var s = nodes_5[_i];
-                    if (s.kind === 220 && !isEmpty(s.name.text)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function isTopLevelFunctionDeclaration(functionDeclaration) {
-                if (functionDeclaration.kind === 220) {
-                    if (functionDeclaration.body && functionDeclaration.body.kind === 199) {
-                        if (hasNamedFunctionDeclarations(functionDeclaration.body.statements)) {
-                            return true;
-                        }
-                        if (!ts.isFunctionBlock(functionDeclaration.parent)) {
-                            return true;
-                        }
-                        else {
-                            var grandParentKind = functionDeclaration.parent.parent.kind;
-                            if (grandParentKind === 147 ||
-                                grandParentKind === 148) {
-                                return true;
-                            }
-                        }
-                    }
-                }
-                return false;
-            }
-            function getItemsWorker(nodes, createItem) {
-                var items = [];
-                var keyToItem = {};
-                for (var _i = 0, nodes_6 = nodes; _i < nodes_6.length; _i++) {
-                    var child = nodes_6[_i];
-                    var item = createItem(child);
-                    if (item !== undefined) {
-                        if (item.text.length > 0) {
-                            var key = item.text + "-" + item.kind + "-" + item.indent;
-                            var itemWithSameName = keyToItem[key];
-                            if (itemWithSameName) {
-                                merge(itemWithSameName, item);
-                            }
-                            else {
-                                keyToItem[key] = item;
-                                items.push(item);
-                            }
-                        }
-                    }
-                }
-                return items;
-            }
-            function merge(target, source) {
-                ts.addRange(target.spans, source.spans);
-                if (source.childItems) {
-                    if (!target.childItems) {
-                        target.childItems = [];
-                    }
-                    outer: for (var _i = 0, _a = source.childItems; _i < _a.length; _i++) {
-                        var sourceChild = _a[_i];
-                        for (var _b = 0, _c = target.childItems; _b < _c.length; _b++) {
-                            var targetChild = _c[_b];
-                            if (targetChild.text === sourceChild.text && targetChild.kind === sourceChild.kind) {
-                                merge(targetChild, sourceChild);
-                                continue outer;
-                            }
-                        }
-                        target.childItems.push(sourceChild);
-                    }
-                }
-            }
-            function createChildItem(node) {
-                switch (node.kind) {
-                    case 142:
-                        if (ts.isBindingPattern(node.name)) {
-                            break;
-                        }
-                        if ((node.flags & 1023) === 0) {
-                            return undefined;
-                        }
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
-                    case 147:
-                    case 146:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberFunctionElement);
-                    case 149:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberGetAccessorElement);
-                    case 150:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberSetAccessorElement);
-                    case 153:
-                        return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
-                    case 224:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.enumElement);
-                    case 255:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
-                    case 222:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.interfaceElement);
-                    case 151:
-                        return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
-                    case 152:
-                        return createItem(node, "new()", ts.ScriptElementKind.constructSignatureElement);
-                    case 145:
-                    case 144:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
-                    case 220:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.functionElement);
-                    case 218:
-                    case 169:
-                        var variableDeclarationNode = void 0;
-                        var name_35;
-                        if (node.kind === 169) {
-                            name_35 = node.name;
-                            variableDeclarationNode = node;
-                            while (variableDeclarationNode && variableDeclarationNode.kind !== 218) {
-                                variableDeclarationNode = variableDeclarationNode.parent;
-                            }
-                            ts.Debug.assert(variableDeclarationNode !== undefined);
-                        }
-                        else {
-                            ts.Debug.assert(!ts.isBindingPattern(node.name));
-                            variableDeclarationNode = node;
-                            name_35 = node.name;
-                        }
-                        if (ts.isConst(variableDeclarationNode)) {
-                            return createItem(node, getTextOfNode(name_35), ts.ScriptElementKind.constElement);
-                        }
-                        else if (ts.isLet(variableDeclarationNode)) {
-                            return createItem(node, getTextOfNode(name_35), ts.ScriptElementKind.letElement);
-                        }
-                        else {
-                            return createItem(node, getTextOfNode(name_35), ts.ScriptElementKind.variableElement);
-                        }
-                    case 148:
-                        return createItem(node, "constructor", ts.ScriptElementKind.constructorImplementationElement);
-                    case 238:
-                    case 234:
-                    case 229:
-                    case 231:
-                    case 232:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.alias);
-                }
-                return undefined;
-                function createItem(node, name, scriptElementKind) {
-                    return getNavigationBarItem(name, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)]);
-                }
-            }
-            function isEmpty(text) {
-                return !text || text.trim() === "";
-            }
-            function getNavigationBarItem(text, kind, kindModifiers, spans, childItems, indent) {
-                if (childItems === void 0) { childItems = []; }
-                if (indent === void 0) { indent = 0; }
-                if (isEmpty(text)) {
-                    return undefined;
-                }
-                return {
-                    text: text,
-                    kind: kind,
-                    kindModifiers: kindModifiers,
-                    spans: spans,
-                    childItems: childItems,
-                    indent: indent,
-                    bolded: false,
-                    grayed: false
-                };
-            }
-            function createTopLevelItem(node) {
-                switch (node.kind) {
-                    case 256:
-                        return createSourceFileItem(node);
-                    case 221:
-                        return createClassItem(node);
-                    case 147:
-                    case 148:
-                        return createMemberFunctionLikeItem(node);
-                    case 224:
-                        return createEnumItem(node);
-                    case 222:
-                        return createInterfaceItem(node);
-                    case 225:
-                        return createModuleItem(node);
-                    case 220:
-                        return createFunctionItem(node);
-                    case 223:
-                        return createTypeAliasItem(node);
-                }
-                return undefined;
-                function getModuleName(moduleDeclaration) {
-                    if (ts.isAmbientModule(moduleDeclaration)) {
-                        return getTextOfNode(moduleDeclaration.name);
-                    }
-                    var result = [];
-                    result.push(moduleDeclaration.name.text);
-                    while (moduleDeclaration.body && moduleDeclaration.body.kind === 225) {
-                        moduleDeclaration = moduleDeclaration.body;
-                        result.push(moduleDeclaration.name.text);
-                    }
-                    return result.join(".");
-                }
-                function createModuleItem(node) {
-                    var moduleName = getModuleName(node);
-                    var childItems = getItemsWorker(getChildNodes(getInnermostModule(node).body.statements), createChildItem);
-                    return getNavigationBarItem(moduleName, ts.ScriptElementKind.moduleElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-                function createFunctionItem(node) {
-                    if (node.body && node.body.kind === 199) {
-                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
-                        return getNavigationBarItem(!node.name ? "default" : node.name.text, ts.ScriptElementKind.functionElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                    }
-                    return undefined;
-                }
-                function createTypeAliasItem(node) {
-                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.typeElement, ts.getNodeModifiers(node), [getNodeSpan(node)], [], getIndent(node));
-                }
-                function createMemberFunctionLikeItem(node) {
-                    if (node.body && node.body.kind === 199) {
-                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
-                        var scriptElementKind = void 0;
-                        var memberFunctionName = void 0;
-                        if (node.kind === 147) {
-                            memberFunctionName = ts.getPropertyNameForPropertyNameNode(node.name);
-                            scriptElementKind = ts.ScriptElementKind.memberFunctionElement;
-                        }
-                        else {
-                            memberFunctionName = "constructor";
-                            scriptElementKind = ts.ScriptElementKind.constructorImplementationElement;
-                        }
-                        return getNavigationBarItem(memberFunctionName, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                    }
-                    return undefined;
-                }
-                function createSourceFileItem(node) {
-                    var childItems = getItemsWorker(getChildNodes(node.statements), createChildItem);
-                    if (childItems === undefined || childItems.length === 0) {
-                        return undefined;
-                    }
-                    hasGlobalNode = true;
-                    var rootName = ts.isExternalModule(node)
-                        ? "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(node.fileName)))) + "\""
-                        : "<global>";
-                    return getNavigationBarItem(rootName, ts.ScriptElementKind.moduleElement, ts.ScriptElementKindModifier.none, [getNodeSpan(node)], childItems);
-                }
-                function createClassItem(node) {
-                    var childItems;
-                    if (node.members) {
-                        var constructor = ts.forEach(node.members, function (member) {
-                            return member.kind === 148 && member;
-                        });
-                        var nodes = removeDynamicallyNamedProperties(node);
-                        if (constructor) {
-                            ts.addRange(nodes, ts.filter(constructor.parameters, function (p) { return !ts.isBindingPattern(p.name); }));
-                        }
-                        childItems = getItemsWorker(sortNodes(nodes), createChildItem);
-                    }
-                    var nodeName = !node.name ? "default" : node.name.text;
-                    return getNavigationBarItem(nodeName, ts.ScriptElementKind.classElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-                function createEnumItem(node) {
-                    var childItems = getItemsWorker(sortNodes(removeComputedProperties(node)), createChildItem);
-                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.enumElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-                function createInterfaceItem(node) {
-                    var childItems = getItemsWorker(sortNodes(removeDynamicallyNamedProperties(node)), createChildItem);
-                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.interfaceElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-            }
-            function removeComputedProperties(node) {
-                return ts.filter(node.members, function (member) { return member.name === undefined || member.name.kind !== 140; });
-            }
-            function removeDynamicallyNamedProperties(node) {
-                return ts.filter(node.members, function (member) { return !ts.hasDynamicName(member); });
-            }
-            function getInnermostModule(node) {
-                while (node.body.kind === 225) {
-                    node = node.body;
-                }
-                return node;
-            }
-            function getNodeSpan(node) {
-                return node.kind === 256
-                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
-            }
-            function getTextOfNode(node) {
-                return ts.getTextOfNodeFromSourceText(sourceFile.text, node);
-            }
-        }
-        NavigationBar.getNavigationBarItems = getNavigationBarItems;
-        function getJsNavigationBarItems(sourceFile, compilerOptions) {
-            var anonFnText = "<function>";
-            var anonClassText = "<class>";
-            var indent = 0;
-            var rootName = ts.isExternalModule(sourceFile) ?
-                "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(sourceFile.fileName)))) + "\""
-                : "<global>";
-            var sourceFileItem = getNavBarItem(rootName, ts.ScriptElementKind.moduleElement, [getNodeSpan(sourceFile)]);
-            var topItem = sourceFileItem;
-            ts.forEachChild(sourceFile, visitNode);
-            function visitNode(node) {
-                var newItem = createNavBarItem(node);
-                if (newItem) {
-                    topItem.childItems.push(newItem);
-                }
-                if (newItem && (ts.isFunctionLike(node) || ts.isClassLike(node))) {
-                    var lastTop = topItem;
-                    indent++;
-                    topItem = newItem;
-                    ts.forEachChild(node, visitNode);
-                    topItem = lastTop;
-                    indent--;
-                    if (newItem && newItem.text === anonFnText && newItem.childItems.length === 0) {
-                        topItem.childItems.pop();
-                    }
-                }
-                else {
-                    ts.forEachChild(node, visitNode);
-                }
-            }
-            function createNavBarItem(node) {
-                switch (node.kind) {
-                    case 218:
-                        if (node.parent.parent
-                            .parent.kind !== 256) {
-                            return undefined;
-                        }
-                        var varDecl = node;
-                        if (varDecl.initializer && (varDecl.initializer.kind === 179 ||
-                            varDecl.initializer.kind === 180 ||
-                            varDecl.initializer.kind === 192)) {
-                            return undefined;
-                        }
-                    case 220:
-                    case 221:
-                    case 148:
-                    case 149:
-                    case 150:
-                        var name_36 = node.flags && (node.flags & 512) && !node.name ? "default" :
-                            node.kind === 148 ? "constructor" :
-                                ts.declarationNameToString(node.name);
-                        return getNavBarItem(name_36, getScriptKindForElementKind(node.kind), [getNodeSpan(node)]);
-                    case 179:
-                    case 180:
-                    case 192:
-                        return getDefineModuleItem(node) || getFunctionOrClassExpressionItem(node);
-                    case 147:
-                        var methodDecl = node;
-                        return getNavBarItem(ts.declarationNameToString(methodDecl.name), ts.ScriptElementKind.memberFunctionElement, [getNodeSpan(node)]);
-                    case 235:
-                        return getNavBarItem("default", ts.ScriptElementKind.variableElement, [getNodeSpan(node)]);
-                    case 231:
-                        if (!node.name) {
-                            return undefined;
-                        }
-                    case 234:
-                    case 232:
-                    case 238:
-                        if (node.kind === 238) {
-                            if (!node.parent.parent.moduleSpecifier && !node.propertyName) {
-                                return undefined;
-                            }
-                        }
-                        var decl = node;
-                        if (!decl.name) {
-                            return undefined;
-                        }
-                        var declName = ts.declarationNameToString(decl.name);
-                        return getNavBarItem(declName, ts.ScriptElementKind.constElement, [getNodeSpan(node)]);
-                    default:
-                        return undefined;
-                }
-            }
-            function getNavBarItem(text, kind, spans, kindModifiers) {
-                if (kindModifiers === void 0) { kindModifiers = ts.ScriptElementKindModifier.none; }
-                return {
-                    text: text, kind: kind, kindModifiers: kindModifiers, spans: spans, childItems: [], indent: indent, bolded: false, grayed: false
-                };
-            }
-            function getDefineModuleItem(node) {
-                if (node.kind !== 179 && node.kind !== 180) {
-                    return undefined;
-                }
-                if (node.parent.kind !== 174) {
-                    return undefined;
-                }
-                var callExpr = node.parent;
-                if (callExpr.expression.kind !== 69 || callExpr.expression.getText() !== "define") {
-                    return undefined;
-                }
-                var defaultName = node.getSourceFile().fileName;
-                if (callExpr.arguments[0].kind === 9) {
-                    defaultName = (callExpr.arguments[0]).text;
-                }
-                return getNavBarItem(defaultName, ts.ScriptElementKind.moduleElement, [getNodeSpan(node.parent)]);
-            }
-            function getFunctionOrClassExpressionItem(node) {
-                if (node.kind !== 179 &&
-                    node.kind !== 180 &&
-                    node.kind !== 192) {
-                    return undefined;
-                }
-                var fnExpr = node;
-                var fnName;
-                if (fnExpr.name && ts.getFullWidth(fnExpr.name) > 0) {
-                    fnName = ts.declarationNameToString(fnExpr.name);
-                }
-                else {
-                    if (fnExpr.parent.kind === 218) {
-                        fnName = ts.declarationNameToString(fnExpr.parent.name);
-                    }
-                    else if (fnExpr.parent.kind === 187 &&
-                        fnExpr.parent.operatorToken.kind === 56) {
-                        fnName = fnExpr.parent.left.getText();
-                    }
-                    else if (fnExpr.parent.kind === 253 &&
-                        fnExpr.parent.name) {
-                        fnName = fnExpr.parent.name.getText();
-                    }
-                    else {
-                        fnName = node.kind === 192 ? anonClassText : anonFnText;
-                    }
-                }
-                var scriptKind = node.kind === 192 ? ts.ScriptElementKind.classElement : ts.ScriptElementKind.functionElement;
-                return getNavBarItem(fnName, scriptKind, [getNodeSpan(node)]);
-            }
-            function getNodeSpan(node) {
-                return node.kind === 256
-                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
-            }
-            function getScriptKindForElementKind(kind) {
-                switch (kind) {
-                    case 218:
-                        return ts.ScriptElementKind.variableElement;
-                    case 220:
-                        return ts.ScriptElementKind.functionElement;
-                    case 221:
-                        return ts.ScriptElementKind.classElement;
-                    case 148:
-                        return ts.ScriptElementKind.constructorImplementationElement;
-                    case 149:
-                        return ts.ScriptElementKind.memberGetAccessorElement;
-                    case 150:
-                        return ts.ScriptElementKind.memberSetAccessorElement;
-                    default:
-                        return "unknown";
-                }
-            }
-            return sourceFileItem.childItems;
-        }
-        NavigationBar.getJsNavigationBarItems = getJsNavigationBarItems;
-    })(NavigationBar = ts.NavigationBar || (ts.NavigationBar = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    (function (PatternMatchKind) {
-        PatternMatchKind[PatternMatchKind["exact"] = 0] = "exact";
-        PatternMatchKind[PatternMatchKind["prefix"] = 1] = "prefix";
-        PatternMatchKind[PatternMatchKind["substring"] = 2] = "substring";
-        PatternMatchKind[PatternMatchKind["camelCase"] = 3] = "camelCase";
-    })(ts.PatternMatchKind || (ts.PatternMatchKind = {}));
-    var PatternMatchKind = ts.PatternMatchKind;
-    function createPatternMatch(kind, punctuationStripped, isCaseSensitive, camelCaseWeight) {
-        return {
-            kind: kind,
-            punctuationStripped: punctuationStripped,
-            isCaseSensitive: isCaseSensitive,
-            camelCaseWeight: camelCaseWeight
-        };
-    }
-    function createPatternMatcher(pattern) {
-        var stringToWordSpans = {};
-        pattern = pattern.trim();
-        var dotSeparatedSegments = pattern.split(".").map(function (p) { return createSegment(p.trim()); });
-        var invalidPattern = dotSeparatedSegments.length === 0 || ts.forEach(dotSeparatedSegments, segmentIsInvalid);
-        return {
-            getMatches: getMatches,
-            getMatchesForLastSegmentOfPattern: getMatchesForLastSegmentOfPattern,
-            patternContainsDots: dotSeparatedSegments.length > 1
-        };
-        function skipMatch(candidate) {
-            return invalidPattern || !candidate;
-        }
-        function getMatchesForLastSegmentOfPattern(candidate) {
-            if (skipMatch(candidate)) {
-                return undefined;
-            }
-            return matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
-        }
-        function getMatches(candidateContainers, candidate) {
-            if (skipMatch(candidate)) {
-                return undefined;
-            }
-            var candidateMatch = matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
-            if (!candidateMatch) {
-                return undefined;
-            }
-            candidateContainers = candidateContainers || [];
-            if (dotSeparatedSegments.length - 1 > candidateContainers.length) {
-                return undefined;
-            }
-            var totalMatch = candidateMatch;
-            for (var i = dotSeparatedSegments.length - 2, j = candidateContainers.length - 1; i >= 0; i -= 1, j -= 1) {
-                var segment = dotSeparatedSegments[i];
-                var containerName = candidateContainers[j];
-                var containerMatch = matchSegment(containerName, segment);
-                if (!containerMatch) {
-                    return undefined;
-                }
-                ts.addRange(totalMatch, containerMatch);
-            }
-            return totalMatch;
-        }
-        function getWordSpans(word) {
-            if (!ts.hasProperty(stringToWordSpans, word)) {
-                stringToWordSpans[word] = breakIntoWordSpans(word);
-            }
-            return stringToWordSpans[word];
-        }
-        function matchTextChunk(candidate, chunk, punctuationStripped) {
-            var index = indexOfIgnoringCase(candidate, chunk.textLowerCase);
-            if (index === 0) {
-                if (chunk.text.length === candidate.length) {
-                    return createPatternMatch(PatternMatchKind.exact, punctuationStripped, candidate === chunk.text);
-                }
-                else {
-                    return createPatternMatch(PatternMatchKind.prefix, punctuationStripped, startsWith(candidate, chunk.text));
-                }
-            }
-            var isLowercase = chunk.isLowerCase;
-            if (isLowercase) {
-                if (index > 0) {
-                    var wordSpans = getWordSpans(candidate);
-                    for (var _i = 0, wordSpans_1 = wordSpans; _i < wordSpans_1.length; _i++) {
-                        var span = wordSpans_1[_i];
-                        if (partStartsWith(candidate, span, chunk.text, true)) {
-                            return createPatternMatch(PatternMatchKind.substring, punctuationStripped, partStartsWith(candidate, span, chunk.text, false));
-                        }
-                    }
-                }
-            }
-            else {
-                if (candidate.indexOf(chunk.text) > 0) {
-                    return createPatternMatch(PatternMatchKind.substring, punctuationStripped, true);
-                }
-            }
-            if (!isLowercase) {
-                if (chunk.characterSpans.length > 0) {
-                    var candidateParts = getWordSpans(candidate);
-                    var camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, false);
-                    if (camelCaseWeight !== undefined) {
-                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, true, camelCaseWeight);
-                    }
-                    camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, true);
-                    if (camelCaseWeight !== undefined) {
-                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, false, camelCaseWeight);
-                    }
-                }
-            }
-            if (isLowercase) {
-                if (chunk.text.length < candidate.length) {
-                    if (index > 0 && isUpperCaseLetter(candidate.charCodeAt(index))) {
-                        return createPatternMatch(PatternMatchKind.substring, punctuationStripped, false);
-                    }
-                }
-            }
-            return undefined;
-        }
-        function containsSpaceOrAsterisk(text) {
-            for (var i = 0; i < text.length; i++) {
-                var ch = text.charCodeAt(i);
-                if (ch === 32 || ch === 42) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function matchSegment(candidate, segment) {
-            if (!containsSpaceOrAsterisk(segment.totalTextChunk.text)) {
-                var match = matchTextChunk(candidate, segment.totalTextChunk, false);
-                if (match) {
-                    return [match];
-                }
-            }
-            var subWordTextChunks = segment.subWordTextChunks;
-            var matches = undefined;
-            for (var _i = 0, subWordTextChunks_1 = subWordTextChunks; _i < subWordTextChunks_1.length; _i++) {
-                var subWordTextChunk = subWordTextChunks_1[_i];
-                var result = matchTextChunk(candidate, subWordTextChunk, true);
-                if (!result) {
-                    return undefined;
-                }
-                matches = matches || [];
-                matches.push(result);
-            }
-            return matches;
-        }
-        function partStartsWith(candidate, candidateSpan, pattern, ignoreCase, patternSpan) {
-            var patternPartStart = patternSpan ? patternSpan.start : 0;
-            var patternPartLength = patternSpan ? patternSpan.length : pattern.length;
-            if (patternPartLength > candidateSpan.length) {
-                return false;
-            }
-            if (ignoreCase) {
-                for (var i = 0; i < patternPartLength; i++) {
-                    var ch1 = pattern.charCodeAt(patternPartStart + i);
-                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
-                    if (toLowerCase(ch1) !== toLowerCase(ch2)) {
-                        return false;
-                    }
-                }
-            }
-            else {
-                for (var i = 0; i < patternPartLength; i++) {
-                    var ch1 = pattern.charCodeAt(patternPartStart + i);
-                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
-                    if (ch1 !== ch2) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        function tryCamelCaseMatch(candidate, candidateParts, chunk, ignoreCase) {
-            var chunkCharacterSpans = chunk.characterSpans;
-            var currentCandidate = 0;
-            var currentChunkSpan = 0;
-            var firstMatch = undefined;
-            var contiguous = undefined;
-            while (true) {
-                if (currentChunkSpan === chunkCharacterSpans.length) {
-                    var weight = 0;
-                    if (contiguous) {
-                        weight += 1;
-                    }
-                    if (firstMatch === 0) {
-                        weight += 2;
-                    }
-                    return weight;
-                }
-                else if (currentCandidate === candidateParts.length) {
-                    return undefined;
-                }
-                var candidatePart = candidateParts[currentCandidate];
-                var gotOneMatchThisCandidate = false;
-                for (; currentChunkSpan < chunkCharacterSpans.length; currentChunkSpan++) {
-                    var chunkCharacterSpan = chunkCharacterSpans[currentChunkSpan];
-                    if (gotOneMatchThisCandidate) {
-                        if (!isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan - 1].start)) ||
-                            !isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan].start))) {
-                            break;
-                        }
-                    }
-                    if (!partStartsWith(candidate, candidatePart, chunk.text, ignoreCase, chunkCharacterSpan)) {
-                        break;
-                    }
-                    gotOneMatchThisCandidate = true;
-                    firstMatch = firstMatch === undefined ? currentCandidate : firstMatch;
-                    contiguous = contiguous === undefined ? true : contiguous;
-                    candidatePart = ts.createTextSpan(candidatePart.start + chunkCharacterSpan.length, candidatePart.length - chunkCharacterSpan.length);
-                }
-                if (!gotOneMatchThisCandidate && contiguous !== undefined) {
-                    contiguous = false;
-                }
-                currentCandidate++;
-            }
-        }
-    }
-    ts.createPatternMatcher = createPatternMatcher;
-    function createSegment(text) {
-        return {
-            totalTextChunk: createTextChunk(text),
-            subWordTextChunks: breakPatternIntoTextChunks(text)
-        };
-    }
-    function segmentIsInvalid(segment) {
-        return segment.subWordTextChunks.length === 0;
-    }
-    function isUpperCaseLetter(ch) {
-        if (ch >= 65 && ch <= 90) {
-            return true;
-        }
-        if (ch < 127 || !ts.isUnicodeIdentifierStart(ch, 2)) {
-            return false;
-        }
-        var str = String.fromCharCode(ch);
-        return str === str.toUpperCase();
-    }
-    function isLowerCaseLetter(ch) {
-        if (ch >= 97 && ch <= 122) {
-            return true;
-        }
-        if (ch < 127 || !ts.isUnicodeIdentifierStart(ch, 2)) {
-            return false;
-        }
-        var str = String.fromCharCode(ch);
-        return str === str.toLowerCase();
-    }
-    function startsWith(string, search) {
-        for (var i = 0, n = search.length; i < n; i++) {
-            if (string.charCodeAt(i) !== search.charCodeAt(i)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function indexOfIgnoringCase(string, value) {
-        for (var i = 0, n = string.length - value.length; i <= n; i++) {
-            if (startsWithIgnoringCase(string, value, i)) {
-                return i;
-            }
-        }
-        return -1;
-    }
-    function startsWithIgnoringCase(string, value, start) {
-        for (var i = 0, n = value.length; i < n; i++) {
-            var ch1 = toLowerCase(string.charCodeAt(i + start));
-            var ch2 = value.charCodeAt(i);
-            if (ch1 !== ch2) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function toLowerCase(ch) {
-        if (ch >= 65 && ch <= 90) {
-            return 97 + (ch - 65);
-        }
-        if (ch < 127) {
-            return ch;
-        }
-        return String.fromCharCode(ch).toLowerCase().charCodeAt(0);
-    }
-    function isDigit(ch) {
-        return ch >= 48 && ch <= 57;
-    }
-    function isWordChar(ch) {
-        return isUpperCaseLetter(ch) || isLowerCaseLetter(ch) || isDigit(ch) || ch === 95 || ch === 36;
-    }
-    function breakPatternIntoTextChunks(pattern) {
-        var result = [];
-        var wordStart = 0;
-        var wordLength = 0;
-        for (var i = 0; i < pattern.length; i++) {
-            var ch = pattern.charCodeAt(i);
-            if (isWordChar(ch)) {
-                if (wordLength === 0) {
-                    wordStart = i;
-                }
-                wordLength++;
-            }
-            else {
-                if (wordLength > 0) {
-                    result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
-                    wordLength = 0;
-                }
-            }
-        }
-        if (wordLength > 0) {
-            result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
-        }
-        return result;
-    }
-    function createTextChunk(text) {
-        var textLowerCase = text.toLowerCase();
-        return {
-            text: text,
-            textLowerCase: textLowerCase,
-            isLowerCase: text === textLowerCase,
-            characterSpans: breakIntoCharacterSpans(text)
-        };
-    }
-    function breakIntoCharacterSpans(identifier) {
-        return breakIntoSpans(identifier, false);
-    }
-    ts.breakIntoCharacterSpans = breakIntoCharacterSpans;
-    function breakIntoWordSpans(identifier) {
-        return breakIntoSpans(identifier, true);
-    }
-    ts.breakIntoWordSpans = breakIntoWordSpans;
-    function breakIntoSpans(identifier, word) {
-        var result = [];
-        var wordStart = 0;
-        for (var i = 1, n = identifier.length; i < n; i++) {
-            var lastIsDigit = isDigit(identifier.charCodeAt(i - 1));
-            var currentIsDigit = isDigit(identifier.charCodeAt(i));
-            var hasTransitionFromLowerToUpper = transitionFromLowerToUpper(identifier, word, i);
-            var hasTransitionFromUpperToLower = transitionFromUpperToLower(identifier, word, i, wordStart);
-            if (charIsPunctuation(identifier.charCodeAt(i - 1)) ||
-                charIsPunctuation(identifier.charCodeAt(i)) ||
-                lastIsDigit !== currentIsDigit ||
-                hasTransitionFromLowerToUpper ||
-                hasTransitionFromUpperToLower) {
-                if (!isAllPunctuation(identifier, wordStart, i)) {
-                    result.push(ts.createTextSpan(wordStart, i - wordStart));
-                }
-                wordStart = i;
-            }
-        }
-        if (!isAllPunctuation(identifier, wordStart, identifier.length)) {
-            result.push(ts.createTextSpan(wordStart, identifier.length - wordStart));
-        }
-        return result;
-    }
-    function charIsPunctuation(ch) {
-        switch (ch) {
-            case 33:
-            case 34:
-            case 35:
-            case 37:
-            case 38:
-            case 39:
-            case 40:
-            case 41:
-            case 42:
-            case 44:
-            case 45:
-            case 46:
-            case 47:
-            case 58:
-            case 59:
-            case 63:
-            case 64:
-            case 91:
-            case 92:
-            case 93:
-            case 95:
-            case 123:
-            case 125:
-                return true;
-        }
-        return false;
-    }
-    function isAllPunctuation(identifier, start, end) {
-        for (var i = start; i < end; i++) {
-            var ch = identifier.charCodeAt(i);
-            if (!charIsPunctuation(ch) || ch === 95 || ch === 36) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function transitionFromUpperToLower(identifier, word, index, wordStart) {
-        if (word) {
-            if (index !== wordStart &&
-                index + 1 < identifier.length) {
-                var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
-                var nextIsLower = isLowerCaseLetter(identifier.charCodeAt(index + 1));
-                if (currentIsUpper && nextIsLower) {
-                    for (var i = wordStart; i < index; i++) {
-                        if (!isUpperCaseLetter(identifier.charCodeAt(i))) {
-                            return false;
-                        }
-                    }
-                    return true;
-                }
-            }
-        }
-        return false;
-    }
-    function transitionFromLowerToUpper(identifier, word, index) {
-        var lastIsUpper = isUpperCaseLetter(identifier.charCodeAt(index - 1));
-        var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
-        var transition = word
-            ? (currentIsUpper && !lastIsUpper)
-            : currentIsUpper;
-        return transition;
-    }
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var SignatureHelp;
-    (function (SignatureHelp) {
-        var emptyArray = [];
-        function getSignatureHelpItems(program, sourceFile, position, cancellationToken) {
-            var typeChecker = program.getTypeChecker();
-            var startingToken = ts.findTokenOnLeftOfPosition(sourceFile, position);
-            if (!startingToken) {
-                return undefined;
-            }
-            var argumentInfo = getContainingArgumentInfo(startingToken);
-            cancellationToken.throwIfCancellationRequested();
-            if (!argumentInfo) {
-                return undefined;
-            }
-            var call = argumentInfo.invocation;
-            var candidates = [];
-            var resolvedSignature = typeChecker.getResolvedSignature(call, candidates);
-            cancellationToken.throwIfCancellationRequested();
-            if (!candidates.length) {
-                if (ts.isSourceFileJavaScript(sourceFile)) {
-                    return createJavaScriptSignatureHelpItems(argumentInfo);
-                }
-                return undefined;
-            }
-            return createSignatureHelpItems(candidates, resolvedSignature, argumentInfo);
-            function createJavaScriptSignatureHelpItems(argumentInfo) {
-                if (argumentInfo.invocation.kind !== 174) {
-                    return undefined;
-                }
-                var callExpression = argumentInfo.invocation;
-                var expression = callExpression.expression;
-                var name = expression.kind === 69
-                    ? expression
-                    : expression.kind === 172
-                        ? expression.name
-                        : undefined;
-                if (!name || !name.text) {
-                    return undefined;
-                }
-                var typeChecker = program.getTypeChecker();
-                for (var _i = 0, _a = program.getSourceFiles(); _i < _a.length; _i++) {
-                    var sourceFile_1 = _a[_i];
-                    var nameToDeclarations = sourceFile_1.getNamedDeclarations();
-                    var declarations = ts.getProperty(nameToDeclarations, name.text);
-                    if (declarations) {
-                        for (var _b = 0, declarations_8 = declarations; _b < declarations_8.length; _b++) {
-                            var declaration = declarations_8[_b];
-                            var symbol = declaration.symbol;
-                            if (symbol) {
-                                var type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
-                                if (type) {
-                                    var callSignatures = type.getCallSignatures();
-                                    if (callSignatures && callSignatures.length) {
-                                        return createSignatureHelpItems(callSignatures, callSignatures[0], argumentInfo);
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            function getImmediatelyContainingArgumentInfo(node) {
-                if (node.parent.kind === 174 || node.parent.kind === 175) {
-                    var callExpression = node.parent;
-                    if (node.kind === 25 ||
-                        node.kind === 17) {
-                        var list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
-                        var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
-                        ts.Debug.assert(list !== undefined);
-                        return {
-                            kind: isTypeArgList ? 0 : 1,
-                            invocation: callExpression,
-                            argumentsSpan: getApplicableSpanForArguments(list),
-                            argumentIndex: 0,
-                            argumentCount: getArgumentCount(list)
-                        };
-                    }
-                    var listItemInfo = ts.findListItemInfo(node);
-                    if (listItemInfo) {
-                        var list = listItemInfo.list;
-                        var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
-                        var argumentIndex = getArgumentIndex(list, node);
-                        var argumentCount = getArgumentCount(list);
-                        ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
-                        return {
-                            kind: isTypeArgList ? 0 : 1,
-                            invocation: callExpression,
-                            argumentsSpan: getApplicableSpanForArguments(list),
-                            argumentIndex: argumentIndex,
-                            argumentCount: argumentCount
-                        };
-                    }
-                }
-                else if (node.kind === 11 && node.parent.kind === 176) {
-                    if (ts.isInsideTemplateLiteral(node, position)) {
-                        return getArgumentListInfoForTemplate(node.parent, 0);
-                    }
-                }
-                else if (node.kind === 12 && node.parent.parent.kind === 176) {
-                    var templateExpression = node.parent;
-                    var tagExpression = templateExpression.parent;
-                    ts.Debug.assert(templateExpression.kind === 189);
-                    var argumentIndex = ts.isInsideTemplateLiteral(node, position) ? 0 : 1;
-                    return getArgumentListInfoForTemplate(tagExpression, argumentIndex);
-                }
-                else if (node.parent.kind === 197 && node.parent.parent.parent.kind === 176) {
-                    var templateSpan = node.parent;
-                    var templateExpression = templateSpan.parent;
-                    var tagExpression = templateExpression.parent;
-                    ts.Debug.assert(templateExpression.kind === 189);
-                    if (node.kind === 14 && !ts.isInsideTemplateLiteral(node, position)) {
-                        return undefined;
-                    }
-                    var spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
-                    var argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node);
-                    return getArgumentListInfoForTemplate(tagExpression, argumentIndex);
-                }
-                return undefined;
-            }
-            function getArgumentIndex(argumentsList, node) {
-                var argumentIndex = 0;
-                var listChildren = argumentsList.getChildren();
-                for (var _i = 0, listChildren_1 = listChildren; _i < listChildren_1.length; _i++) {
-                    var child = listChildren_1[_i];
-                    if (child === node) {
-                        break;
-                    }
-                    if (child.kind !== 24) {
-                        argumentIndex++;
-                    }
-                }
-                return argumentIndex;
-            }
-            function getArgumentCount(argumentsList) {
-                var listChildren = argumentsList.getChildren();
-                var argumentCount = ts.countWhere(listChildren, function (arg) { return arg.kind !== 24; });
-                if (listChildren.length > 0 && ts.lastOrUndefined(listChildren).kind === 24) {
-                    argumentCount++;
-                }
-                return argumentCount;
-            }
-            function getArgumentIndexForTemplatePiece(spanIndex, node) {
-                ts.Debug.assert(position >= node.getStart(), "Assumed 'position' could not occur before node.");
-                if (ts.isTemplateLiteralKind(node.kind)) {
-                    if (ts.isInsideTemplateLiteral(node, position)) {
-                        return 0;
-                    }
-                    return spanIndex + 2;
-                }
-                return spanIndex + 1;
-            }
-            function getArgumentListInfoForTemplate(tagExpression, argumentIndex) {
-                var argumentCount = tagExpression.template.kind === 11
-                    ? 1
-                    : tagExpression.template.templateSpans.length + 1;
-                ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
-                return {
-                    kind: 2,
-                    invocation: tagExpression,
-                    argumentsSpan: getApplicableSpanForTaggedTemplate(tagExpression),
-                    argumentIndex: argumentIndex,
-                    argumentCount: argumentCount
-                };
-            }
-            function getApplicableSpanForArguments(argumentsList) {
-                var applicableSpanStart = argumentsList.getFullStart();
-                var applicableSpanEnd = ts.skipTrivia(sourceFile.text, argumentsList.getEnd(), false);
-                return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
-            }
-            function getApplicableSpanForTaggedTemplate(taggedTemplate) {
-                var template = taggedTemplate.template;
-                var applicableSpanStart = template.getStart();
-                var applicableSpanEnd = template.getEnd();
-                if (template.kind === 189) {
-                    var lastSpan = ts.lastOrUndefined(template.templateSpans);
-                    if (lastSpan.literal.getFullWidth() === 0) {
-                        applicableSpanEnd = ts.skipTrivia(sourceFile.text, applicableSpanEnd, false);
-                    }
-                }
-                return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
-            }
-            function getContainingArgumentInfo(node) {
-                for (var n = node; n.kind !== 256; n = n.parent) {
-                    if (ts.isFunctionBlock(n)) {
-                        return undefined;
-                    }
-                    if (n.pos < n.parent.pos || n.end > n.parent.end) {
-                        ts.Debug.fail("Node of kind " + n.kind + " is not a subspan of its parent of kind " + n.parent.kind);
-                    }
-                    var argumentInfo_1 = getImmediatelyContainingArgumentInfo(n);
-                    if (argumentInfo_1) {
-                        return argumentInfo_1;
-                    }
-                }
-                return undefined;
-            }
-            function getChildListThatStartsWithOpenerToken(parent, openerToken, sourceFile) {
-                var children = parent.getChildren(sourceFile);
-                var indexOfOpenerToken = children.indexOf(openerToken);
-                ts.Debug.assert(indexOfOpenerToken >= 0 && children.length > indexOfOpenerToken + 1);
-                return children[indexOfOpenerToken + 1];
-            }
-            function selectBestInvalidOverloadIndex(candidates, argumentCount) {
-                var maxParamsSignatureIndex = -1;
-                var maxParams = -1;
-                for (var i = 0; i < candidates.length; i++) {
-                    var candidate = candidates[i];
-                    if (candidate.hasRestParameter || candidate.parameters.length >= argumentCount) {
-                        return i;
-                    }
-                    if (candidate.parameters.length > maxParams) {
-                        maxParams = candidate.parameters.length;
-                        maxParamsSignatureIndex = i;
-                    }
-                }
-                return maxParamsSignatureIndex;
-            }
-            function createSignatureHelpItems(candidates, bestSignature, argumentListInfo) {
-                var applicableSpan = argumentListInfo.argumentsSpan;
-                var isTypeParameterList = argumentListInfo.kind === 0;
-                var invocation = argumentListInfo.invocation;
-                var callTarget = ts.getInvokedExpression(invocation);
-                var callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
-                var callTargetDisplayParts = callTargetSymbol && ts.symbolToDisplayParts(typeChecker, callTargetSymbol, undefined, undefined);
-                var items = ts.map(candidates, function (candidateSignature) {
-                    var signatureHelpParameters;
-                    var prefixDisplayParts = [];
-                    var suffixDisplayParts = [];
-                    if (callTargetDisplayParts) {
-                        ts.addRange(prefixDisplayParts, callTargetDisplayParts);
-                    }
-                    if (isTypeParameterList) {
-                        prefixDisplayParts.push(ts.punctuationPart(25));
-                        var typeParameters = candidateSignature.typeParameters;
-                        signatureHelpParameters = typeParameters && typeParameters.length > 0 ? ts.map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
-                        suffixDisplayParts.push(ts.punctuationPart(27));
-                        var parameterParts = ts.mapToDisplayParts(function (writer) {
-                            return typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisType, candidateSignature.parameters, writer, invocation);
-                        });
-                        ts.addRange(suffixDisplayParts, parameterParts);
-                    }
-                    else {
-                        var typeParameterParts = ts.mapToDisplayParts(function (writer) {
-                            return typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation);
-                        });
-                        ts.addRange(prefixDisplayParts, typeParameterParts);
-                        prefixDisplayParts.push(ts.punctuationPart(17));
-                        var parameters = candidateSignature.parameters;
-                        signatureHelpParameters = parameters.length > 0 ? ts.map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
-                        suffixDisplayParts.push(ts.punctuationPart(18));
-                    }
-                    var returnTypeParts = ts.mapToDisplayParts(function (writer) {
-                        return typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation);
-                    });
-                    ts.addRange(suffixDisplayParts, returnTypeParts);
-                    return {
-                        isVariadic: candidateSignature.hasRestParameter,
-                        prefixDisplayParts: prefixDisplayParts,
-                        suffixDisplayParts: suffixDisplayParts,
-                        separatorDisplayParts: [ts.punctuationPart(24), ts.spacePart()],
-                        parameters: signatureHelpParameters,
-                        documentation: candidateSignature.getDocumentationComment()
-                    };
-                });
-                var argumentIndex = argumentListInfo.argumentIndex;
-                var argumentCount = argumentListInfo.argumentCount;
-                var selectedItemIndex = candidates.indexOf(bestSignature);
-                if (selectedItemIndex < 0) {
-                    selectedItemIndex = selectBestInvalidOverloadIndex(candidates, argumentCount);
-                }
-                ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
-                return {
-                    items: items,
-                    applicableSpan: applicableSpan,
-                    selectedItemIndex: selectedItemIndex,
-                    argumentIndex: argumentIndex,
-                    argumentCount: argumentCount
-                };
-                function createSignatureHelpParameterForParameter(parameter) {
-                    var displayParts = ts.mapToDisplayParts(function (writer) {
-                        return typeChecker.getSymbolDisplayBuilder().buildParameterDisplay(parameter, writer, invocation);
-                    });
-                    return {
-                        name: parameter.name,
-                        documentation: parameter.getDocumentationComment(),
-                        displayParts: displayParts,
-                        isOptional: typeChecker.isOptionalParameter(parameter.valueDeclaration)
-                    };
-                }
-                function createSignatureHelpParameterForTypeParameter(typeParameter) {
-                    var displayParts = ts.mapToDisplayParts(function (writer) {
-                        return typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(typeParameter, writer, invocation);
-                    });
-                    return {
-                        name: typeParameter.symbol.name,
-                        documentation: emptyArray,
-                        displayParts: displayParts,
-                        isOptional: false
-                    };
-                }
-            }
-        }
-        SignatureHelp.getSignatureHelpItems = getSignatureHelpItems;
-    })(SignatureHelp = ts.SignatureHelp || (ts.SignatureHelp = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getLineStartPositionForPosition(position, sourceFile) {
-        var lineStarts = sourceFile.getLineStarts();
-        var line = sourceFile.getLineAndCharacterOfPosition(position).line;
-        return lineStarts[line];
-    }
-    ts.getLineStartPositionForPosition = getLineStartPositionForPosition;
-    function rangeContainsRange(r1, r2) {
-        return startEndContainsRange(r1.pos, r1.end, r2);
-    }
-    ts.rangeContainsRange = rangeContainsRange;
-    function startEndContainsRange(start, end, range) {
-        return start <= range.pos && end >= range.end;
-    }
-    ts.startEndContainsRange = startEndContainsRange;
-    function rangeContainsStartEnd(range, start, end) {
-        return range.pos <= start && range.end >= end;
-    }
-    ts.rangeContainsStartEnd = rangeContainsStartEnd;
-    function rangeOverlapsWithStartEnd(r1, start, end) {
-        return startEndOverlapsWithStartEnd(r1.pos, r1.end, start, end);
-    }
-    ts.rangeOverlapsWithStartEnd = rangeOverlapsWithStartEnd;
-    function startEndOverlapsWithStartEnd(start1, end1, start2, end2) {
-        var start = Math.max(start1, start2);
-        var end = Math.min(end1, end2);
-        return start < end;
-    }
-    ts.startEndOverlapsWithStartEnd = startEndOverlapsWithStartEnd;
-    function positionBelongsToNode(candidate, position, sourceFile) {
-        return candidate.end > position || !isCompletedNode(candidate, sourceFile);
-    }
-    ts.positionBelongsToNode = positionBelongsToNode;
-    function isCompletedNode(n, sourceFile) {
-        if (ts.nodeIsMissing(n)) {
-            return false;
-        }
-        switch (n.kind) {
-            case 221:
-            case 222:
-            case 224:
-            case 171:
-            case 167:
-            case 159:
-            case 199:
-            case 226:
-            case 227:
-                return nodeEndsWith(n, 16, sourceFile);
-            case 252:
-                return isCompletedNode(n.block, sourceFile);
-            case 175:
-                if (!n.arguments) {
-                    return true;
-                }
-            case 174:
-            case 178:
-            case 164:
-                return nodeEndsWith(n, 18, sourceFile);
-            case 156:
-            case 157:
-                return isCompletedNode(n.type, sourceFile);
-            case 148:
-            case 149:
-            case 150:
-            case 220:
-            case 179:
-            case 147:
-            case 146:
-            case 152:
-            case 151:
-            case 180:
-                if (n.body) {
-                    return isCompletedNode(n.body, sourceFile);
-                }
-                if (n.type) {
-                    return isCompletedNode(n.type, sourceFile);
-                }
-                return hasChildOfKind(n, 18, sourceFile);
-            case 225:
-                return n.body && isCompletedNode(n.body, sourceFile);
-            case 203:
-                if (n.elseStatement) {
-                    return isCompletedNode(n.elseStatement, sourceFile);
-                }
-                return isCompletedNode(n.thenStatement, sourceFile);
-            case 202:
-                return isCompletedNode(n.expression, sourceFile) ||
-                    hasChildOfKind(n, 23);
-            case 170:
-            case 168:
-            case 173:
-            case 140:
-            case 161:
-                return nodeEndsWith(n, 20, sourceFile);
-            case 153:
-                if (n.type) {
-                    return isCompletedNode(n.type, sourceFile);
-                }
-                return hasChildOfKind(n, 20, sourceFile);
-            case 249:
-            case 250:
-                return false;
-            case 206:
-            case 207:
-            case 208:
-            case 205:
-                return isCompletedNode(n.statement, sourceFile);
-            case 204:
-                var hasWhileKeyword = findChildOfKind(n, 104, sourceFile);
-                if (hasWhileKeyword) {
-                    return nodeEndsWith(n, 18, sourceFile);
-                }
-                return isCompletedNode(n.statement, sourceFile);
-            case 158:
-                return isCompletedNode(n.exprName, sourceFile);
-            case 182:
-            case 181:
-            case 183:
-            case 190:
-            case 191:
-                var unaryWordExpression = n;
-                return isCompletedNode(unaryWordExpression.expression, sourceFile);
-            case 176:
-                return isCompletedNode(n.template, sourceFile);
-            case 189:
-                var lastSpan = ts.lastOrUndefined(n.templateSpans);
-                return isCompletedNode(lastSpan, sourceFile);
-            case 197:
-                return ts.nodeIsPresent(n.literal);
-            case 185:
-                return isCompletedNode(n.operand, sourceFile);
-            case 187:
-                return isCompletedNode(n.right, sourceFile);
-            case 188:
-                return isCompletedNode(n.whenFalse, sourceFile);
-            default:
-                return true;
-        }
-    }
-    ts.isCompletedNode = isCompletedNode;
-    function nodeEndsWith(n, expectedLastToken, sourceFile) {
-        var children = n.getChildren(sourceFile);
-        if (children.length) {
-            var last = ts.lastOrUndefined(children);
-            if (last.kind === expectedLastToken) {
-                return true;
-            }
-            else if (last.kind === 23 && children.length !== 1) {
-                return children[children.length - 2].kind === expectedLastToken;
-            }
-        }
-        return false;
-    }
-    function findListItemInfo(node) {
-        var list = findContainingList(node);
-        if (!list) {
-            return undefined;
-        }
-        var children = list.getChildren();
-        var listItemIndex = ts.indexOf(children, node);
-        return {
-            listItemIndex: listItemIndex,
-            list: list
-        };
-    }
-    ts.findListItemInfo = findListItemInfo;
-    function hasChildOfKind(n, kind, sourceFile) {
-        return !!findChildOfKind(n, kind, sourceFile);
-    }
-    ts.hasChildOfKind = hasChildOfKind;
-    function findChildOfKind(n, kind, sourceFile) {
-        return ts.forEach(n.getChildren(sourceFile), function (c) { return c.kind === kind && c; });
-    }
-    ts.findChildOfKind = findChildOfKind;
-    function findContainingList(node) {
-        var syntaxList = ts.forEach(node.parent.getChildren(), function (c) {
-            if (c.kind === 279 && c.pos <= node.pos && c.end >= node.end) {
-                return c;
-            }
-        });
-        ts.Debug.assert(!syntaxList || ts.contains(syntaxList.getChildren(), node));
-        return syntaxList;
-    }
-    ts.findContainingList = findContainingList;
-    function getTouchingWord(sourceFile, position) {
-        return getTouchingToken(sourceFile, position, function (n) { return isWord(n.kind); });
-    }
-    ts.getTouchingWord = getTouchingWord;
-    function getTouchingPropertyName(sourceFile, position) {
-        return getTouchingToken(sourceFile, position, function (n) { return isPropertyName(n.kind); });
-    }
-    ts.getTouchingPropertyName = getTouchingPropertyName;
-    function getTouchingToken(sourceFile, position, includeItemAtEndPosition) {
-        return getTokenAtPositionWorker(sourceFile, position, false, includeItemAtEndPosition);
-    }
-    ts.getTouchingToken = getTouchingToken;
-    function getTokenAtPosition(sourceFile, position) {
-        return getTokenAtPositionWorker(sourceFile, position, true, undefined);
-    }
-    ts.getTokenAtPosition = getTokenAtPosition;
-    function getTokenAtPositionWorker(sourceFile, position, allowPositionInLeadingTrivia, includeItemAtEndPosition) {
-        var current = sourceFile;
-        outer: while (true) {
-            if (isToken(current)) {
-                return current;
-            }
-            for (var i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
-                var child = current.getChildAt(i);
-                var start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile);
-                if (start <= position) {
-                    var end = child.getEnd();
-                    if (position < end || (position === end && child.kind === 1)) {
-                        current = child;
-                        continue outer;
-                    }
-                    else if (includeItemAtEndPosition && end === position) {
-                        var previousToken = findPrecedingToken(position, sourceFile, child);
-                        if (previousToken && includeItemAtEndPosition(previousToken)) {
-                            return previousToken;
-                        }
-                    }
-                }
-            }
-            return current;
-        }
-    }
-    function findTokenOnLeftOfPosition(file, position) {
-        var tokenAtPosition = getTokenAtPosition(file, position);
-        if (isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
-            return tokenAtPosition;
-        }
-        return findPrecedingToken(position, file);
-    }
-    ts.findTokenOnLeftOfPosition = findTokenOnLeftOfPosition;
-    function findNextToken(previousToken, parent) {
-        return find(parent);
-        function find(n) {
-            if (isToken(n) && n.pos === previousToken.end) {
-                return n;
-            }
-            var children = n.getChildren();
-            for (var _i = 0, children_1 = children; _i < children_1.length; _i++) {
-                var child = children_1[_i];
-                var shouldDiveInChildNode = (child.pos <= previousToken.pos && child.end > previousToken.end) ||
-                    (child.pos === previousToken.end);
-                if (shouldDiveInChildNode && nodeHasTokens(child)) {
-                    return find(child);
-                }
-            }
-            return undefined;
-        }
-    }
-    ts.findNextToken = findNextToken;
-    function findPrecedingToken(position, sourceFile, startNode) {
-        return find(startNode || sourceFile);
-        function findRightmostToken(n) {
-            if (isToken(n) || n.kind === 244) {
-                return n;
-            }
-            var children = n.getChildren();
-            var candidate = findRightmostChildNodeWithTokens(children, children.length);
-            return candidate && findRightmostToken(candidate);
-        }
-        function find(n) {
-            if (isToken(n) || n.kind === 244) {
-                return n;
-            }
-            var children = n.getChildren();
-            for (var i = 0, len = children.length; i < len; i++) {
-                var child = children[i];
-                if (position < child.end && (nodeHasTokens(child) || child.kind === 244)) {
-                    var start = child.getStart(sourceFile);
-                    var lookInPreviousChild = (start >= position) ||
-                        (child.kind === 244 && start === child.end);
-                    if (lookInPreviousChild) {
-                        var candidate = findRightmostChildNodeWithTokens(children, i);
-                        return candidate && findRightmostToken(candidate);
-                    }
-                    else {
-                        return find(child);
-                    }
-                }
-            }
-            ts.Debug.assert(startNode !== undefined || n.kind === 256);
-            if (children.length) {
-                var candidate = findRightmostChildNodeWithTokens(children, children.length);
-                return candidate && findRightmostToken(candidate);
-            }
-        }
-        function findRightmostChildNodeWithTokens(children, exclusiveStartPosition) {
-            for (var i = exclusiveStartPosition - 1; i >= 0; i--) {
-                if (nodeHasTokens(children[i])) {
-                    return children[i];
-                }
-            }
-        }
-    }
-    ts.findPrecedingToken = findPrecedingToken;
-    function isInString(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        return token && (token.kind === 9 || token.kind === 166) && position > token.getStart(sourceFile);
-    }
-    ts.isInString = isInString;
-    function isInComment(sourceFile, position) {
-        return isInCommentHelper(sourceFile, position, undefined);
-    }
-    ts.isInComment = isInComment;
-    function isInsideJsxElementOrAttribute(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        if (!token) {
-            return false;
-        }
-        if (token.kind === 25 && token.parent.kind === 244) {
-            return true;
-        }
-        if (token.kind === 25 && token.parent.kind === 248) {
-            return true;
-        }
-        if (token && token.kind === 16 && token.parent.kind === 248) {
-            return true;
-        }
-        if (token.kind === 25 && token.parent.kind === 245) {
-            return true;
-        }
-        return false;
-    }
-    ts.isInsideJsxElementOrAttribute = isInsideJsxElementOrAttribute;
-    function isInTemplateString(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        return ts.isTemplateLiteralKind(token.kind) && position > token.getStart(sourceFile);
-    }
-    ts.isInTemplateString = isInTemplateString;
-    function isInCommentHelper(sourceFile, position, predicate) {
-        var token = getTokenAtPosition(sourceFile, position);
-        if (token && position <= token.getStart(sourceFile)) {
-            var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
-            return predicate ?
-                ts.forEach(commentRanges, function (c) { return c.pos < position &&
-                    (c.kind == 2 ? position <= c.end : position < c.end) &&
-                    predicate(c); }) :
-                ts.forEach(commentRanges, function (c) { return c.pos < position &&
-                    (c.kind == 2 ? position <= c.end : position < c.end); });
-        }
-        return false;
-    }
-    ts.isInCommentHelper = isInCommentHelper;
-    function hasDocComment(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
-        return ts.forEach(commentRanges, jsDocPrefix);
-        function jsDocPrefix(c) {
-            var text = sourceFile.text;
-            return text.length >= c.pos + 3 && text[c.pos] === "/" && text[c.pos + 1] === "*" && text[c.pos + 2] === "*";
-        }
-    }
-    ts.hasDocComment = hasDocComment;
-    function getJsDocTagAtPosition(sourceFile, position) {
-        var node = ts.getTokenAtPosition(sourceFile, position);
-        if (isToken(node)) {
-            switch (node.kind) {
-                case 102:
-                case 108:
-                case 74:
-                    node = node.parent === undefined ? undefined : node.parent.parent;
-                    break;
-                default:
-                    node = node.parent;
-                    break;
-            }
-        }
-        if (node) {
-            var jsDocComment = node.jsDocComment;
-            if (jsDocComment) {
-                for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-                    var tag = _a[_i];
-                    if (tag.pos <= position && position <= tag.end) {
-                        return tag;
-                    }
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getJsDocTagAtPosition = getJsDocTagAtPosition;
-    function nodeHasTokens(n) {
-        return n.getWidth() !== 0;
-    }
-    function getNodeModifiers(node) {
-        var flags = ts.getCombinedNodeFlags(node);
-        var result = [];
-        if (flags & 8)
-            result.push(ts.ScriptElementKindModifier.privateMemberModifier);
-        if (flags & 16)
-            result.push(ts.ScriptElementKindModifier.protectedMemberModifier);
-        if (flags & 4)
-            result.push(ts.ScriptElementKindModifier.publicMemberModifier);
-        if (flags & 32)
-            result.push(ts.ScriptElementKindModifier.staticModifier);
-        if (flags & 128)
-            result.push(ts.ScriptElementKindModifier.abstractModifier);
-        if (flags & 1)
-            result.push(ts.ScriptElementKindModifier.exportedModifier);
-        if (ts.isInAmbientContext(node))
-            result.push(ts.ScriptElementKindModifier.ambientModifier);
-        return result.length > 0 ? result.join(",") : ts.ScriptElementKindModifier.none;
-    }
-    ts.getNodeModifiers = getNodeModifiers;
-    function getTypeArgumentOrTypeParameterList(node) {
-        if (node.kind === 155 || node.kind === 174) {
-            return node.typeArguments;
-        }
-        if (ts.isFunctionLike(node) || node.kind === 221 || node.kind === 222) {
-            return node.typeParameters;
-        }
-        return undefined;
-    }
-    ts.getTypeArgumentOrTypeParameterList = getTypeArgumentOrTypeParameterList;
-    function isToken(n) {
-        return n.kind >= 0 && n.kind <= 138;
-    }
-    ts.isToken = isToken;
-    function isWord(kind) {
-        return kind === 69 || ts.isKeyword(kind);
-    }
-    ts.isWord = isWord;
-    function isPropertyName(kind) {
-        return kind === 9 || kind === 8 || isWord(kind);
-    }
-    function isComment(kind) {
-        return kind === 2 || kind === 3;
-    }
-    ts.isComment = isComment;
-    function isStringOrRegularExpressionOrTemplateLiteral(kind) {
-        if (kind === 9
-            || kind === 166
-            || kind === 10
-            || ts.isTemplateLiteralKind(kind)) {
-            return true;
-        }
-        return false;
-    }
-    ts.isStringOrRegularExpressionOrTemplateLiteral = isStringOrRegularExpressionOrTemplateLiteral;
-    function isPunctuation(kind) {
-        return 15 <= kind && kind <= 68;
-    }
-    ts.isPunctuation = isPunctuation;
-    function isInsideTemplateLiteral(node, position) {
-        return ts.isTemplateLiteralKind(node.kind)
-            && (node.getStart() < position && position < node.getEnd()) || (!!node.isUnterminated && position === node.getEnd());
-    }
-    ts.isInsideTemplateLiteral = isInsideTemplateLiteral;
-    function isAccessibilityModifier(kind) {
-        switch (kind) {
-            case 112:
-            case 110:
-            case 111:
-                return true;
-        }
-        return false;
-    }
-    ts.isAccessibilityModifier = isAccessibilityModifier;
-    function compareDataObjects(dst, src) {
-        for (var e in dst) {
-            if (typeof dst[e] === "object") {
-                if (!compareDataObjects(dst[e], src[e])) {
-                    return false;
-                }
-            }
-            else if (typeof dst[e] !== "function") {
-                if (dst[e] !== src[e]) {
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-    ts.compareDataObjects = compareDataObjects;
-    function isArrayLiteralOrObjectLiteralDestructuringPattern(node) {
-        if (node.kind === 170 ||
-            node.kind === 171) {
-            if (node.parent.kind === 187 &&
-                node.parent.left === node &&
-                node.parent.operatorToken.kind === 56) {
-                return true;
-            }
-            if (node.parent.kind === 208 &&
-                node.parent.initializer === node) {
-                return true;
-            }
-            if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.kind === 253 ? node.parent.parent : node.parent)) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.isArrayLiteralOrObjectLiteralDestructuringPattern = isArrayLiteralOrObjectLiteralDestructuringPattern;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function isFirstDeclarationOfSymbolParameter(symbol) {
-        return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === 142;
-    }
-    ts.isFirstDeclarationOfSymbolParameter = isFirstDeclarationOfSymbolParameter;
-    var displayPartWriter = getDisplayPartWriter();
-    function getDisplayPartWriter() {
-        var displayParts;
-        var lineStart;
-        var indent;
-        resetWriter();
-        return {
-            displayParts: function () { return displayParts; },
-            writeKeyword: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.keyword); },
-            writeOperator: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.operator); },
-            writePunctuation: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.punctuation); },
-            writeSpace: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.space); },
-            writeStringLiteral: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.stringLiteral); },
-            writeParameter: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.parameterName); },
-            writeSymbol: writeSymbol,
-            writeLine: writeLine,
-            increaseIndent: function () { indent++; },
-            decreaseIndent: function () { indent--; },
-            clear: resetWriter,
-            trackSymbol: function () { },
-            reportInaccessibleThisError: function () { }
-        };
-        function writeIndent() {
-            if (lineStart) {
-                var indentString = ts.getIndentString(indent);
-                if (indentString) {
-                    displayParts.push(displayPart(indentString, ts.SymbolDisplayPartKind.space));
-                }
-                lineStart = false;
-            }
-        }
-        function writeKind(text, kind) {
-            writeIndent();
-            displayParts.push(displayPart(text, kind));
-        }
-        function writeSymbol(text, symbol) {
-            writeIndent();
-            displayParts.push(symbolPart(text, symbol));
-        }
-        function writeLine() {
-            displayParts.push(lineBreakPart());
-            lineStart = true;
-        }
-        function resetWriter() {
-            displayParts = [];
-            lineStart = true;
-            indent = 0;
-        }
-    }
-    function symbolPart(text, symbol) {
-        return displayPart(text, displayPartKind(symbol), symbol);
-        function displayPartKind(symbol) {
-            var flags = symbol.flags;
-            if (flags & 3) {
-                return isFirstDeclarationOfSymbolParameter(symbol) ? ts.SymbolDisplayPartKind.parameterName : ts.SymbolDisplayPartKind.localName;
-            }
-            else if (flags & 4) {
-                return ts.SymbolDisplayPartKind.propertyName;
-            }
-            else if (flags & 32768) {
-                return ts.SymbolDisplayPartKind.propertyName;
-            }
-            else if (flags & 65536) {
-                return ts.SymbolDisplayPartKind.propertyName;
-            }
-            else if (flags & 8) {
-                return ts.SymbolDisplayPartKind.enumMemberName;
-            }
-            else if (flags & 16) {
-                return ts.SymbolDisplayPartKind.functionName;
-            }
-            else if (flags & 32) {
-                return ts.SymbolDisplayPartKind.className;
-            }
-            else if (flags & 64) {
-                return ts.SymbolDisplayPartKind.interfaceName;
-            }
-            else if (flags & 384) {
-                return ts.SymbolDisplayPartKind.enumName;
-            }
-            else if (flags & 1536) {
-                return ts.SymbolDisplayPartKind.moduleName;
-            }
-            else if (flags & 8192) {
-                return ts.SymbolDisplayPartKind.methodName;
-            }
-            else if (flags & 262144) {
-                return ts.SymbolDisplayPartKind.typeParameterName;
-            }
-            else if (flags & 524288) {
-                return ts.SymbolDisplayPartKind.aliasName;
-            }
-            else if (flags & 8388608) {
-                return ts.SymbolDisplayPartKind.aliasName;
-            }
-            return ts.SymbolDisplayPartKind.text;
-        }
-    }
-    ts.symbolPart = symbolPart;
-    function displayPart(text, kind, symbol) {
-        return {
-            text: text,
-            kind: ts.SymbolDisplayPartKind[kind]
-        };
-    }
-    ts.displayPart = displayPart;
-    function spacePart() {
-        return displayPart(" ", ts.SymbolDisplayPartKind.space);
-    }
-    ts.spacePart = spacePart;
-    function keywordPart(kind) {
-        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.keyword);
-    }
-    ts.keywordPart = keywordPart;
-    function punctuationPart(kind) {
-        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.punctuation);
-    }
-    ts.punctuationPart = punctuationPart;
-    function operatorPart(kind) {
-        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.operator);
-    }
-    ts.operatorPart = operatorPart;
-    function textOrKeywordPart(text) {
-        var kind = ts.stringToToken(text);
-        return kind === undefined
-            ? textPart(text)
-            : keywordPart(kind);
-    }
-    ts.textOrKeywordPart = textOrKeywordPart;
-    function textPart(text) {
-        return displayPart(text, ts.SymbolDisplayPartKind.text);
-    }
-    ts.textPart = textPart;
-    var carriageReturnLineFeed = "\r\n";
-    function getNewLineOrDefaultFromHost(host) {
-        return host.getNewLine ? host.getNewLine() : carriageReturnLineFeed;
-    }
-    ts.getNewLineOrDefaultFromHost = getNewLineOrDefaultFromHost;
-    function lineBreakPart() {
-        return displayPart("\n", ts.SymbolDisplayPartKind.lineBreak);
-    }
-    ts.lineBreakPart = lineBreakPart;
-    function mapToDisplayParts(writeDisplayParts) {
-        writeDisplayParts(displayPartWriter);
-        var result = displayPartWriter.displayParts();
-        displayPartWriter.clear();
-        return result;
-    }
-    ts.mapToDisplayParts = mapToDisplayParts;
-    function typeToDisplayParts(typechecker, type, enclosingDeclaration, flags) {
-        return mapToDisplayParts(function (writer) {
-            typechecker.getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        });
-    }
-    ts.typeToDisplayParts = typeToDisplayParts;
-    function symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration, meaning, flags) {
-        return mapToDisplayParts(function (writer) {
-            typeChecker.getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags);
-        });
-    }
-    ts.symbolToDisplayParts = symbolToDisplayParts;
-    function signatureToDisplayParts(typechecker, signature, enclosingDeclaration, flags) {
-        return mapToDisplayParts(function (writer) {
-            typechecker.getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags);
-        });
-    }
-    ts.signatureToDisplayParts = signatureToDisplayParts;
-    function getDeclaredName(typeChecker, symbol, location) {
-        if (isImportOrExportSpecifierName(location)) {
-            return location.getText();
-        }
-        else if (ts.isStringOrNumericLiteral(location.kind) &&
-            location.parent.kind === 140) {
-            return location.text;
-        }
-        var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
-        var name = typeChecker.symbolToString(localExportDefaultSymbol || symbol);
-        return name;
-    }
-    ts.getDeclaredName = getDeclaredName;
-    function isImportOrExportSpecifierName(location) {
-        return location.parent &&
-            (location.parent.kind === 234 || location.parent.kind === 238) &&
-            location.parent.propertyName === location;
-    }
-    ts.isImportOrExportSpecifierName = isImportOrExportSpecifierName;
-    function stripQuotes(name) {
-        var length = name.length;
-        if (length >= 2 &&
-            name.charCodeAt(0) === name.charCodeAt(length - 1) &&
-            (name.charCodeAt(0) === 34 || name.charCodeAt(0) === 39)) {
-            return name.substring(1, length - 1);
-        }
-        ;
-        return name;
-    }
-    ts.stripQuotes = stripQuotes;
-    function scriptKindIs(fileName, host) {
-        var scriptKinds = [];
-        for (var _i = 2; _i < arguments.length; _i++) {
-            scriptKinds[_i - 2] = arguments[_i];
-        }
-        var scriptKind = getScriptKind(fileName, host);
-        return ts.forEach(scriptKinds, function (k) { return k === scriptKind; });
-    }
-    ts.scriptKindIs = scriptKindIs;
-    function getScriptKind(fileName, host) {
-        var scriptKind;
-        if (host && host.getScriptKind) {
-            scriptKind = host.getScriptKind(fileName);
-        }
-        if (!scriptKind || scriptKind === 0) {
-            scriptKind = ts.getScriptKindFromFileName(fileName);
-        }
-        return ts.ensureScriptKind(fileName, scriptKind);
-    }
-    ts.getScriptKind = getScriptKind;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var JsTyping;
-    (function (JsTyping) {
-        ;
-        ;
-        var safeList;
-        function discoverTypings(host, fileNames, projectRootPath, safeListPath, packageNameToTypingLocation, typingOptions, compilerOptions) {
-            var inferredTypings = {};
-            if (!typingOptions || !typingOptions.enableAutoDiscovery) {
-                return { cachedTypingPaths: [], newTypingNames: [], filesToWatch: [] };
-            }
-            fileNames = ts.filter(ts.map(fileNames, ts.normalizePath), function (f) { return ts.scriptKindIs(f, undefined, 1, 2); });
-            if (!safeList) {
-                var result = ts.readConfigFile(safeListPath, function (path) { return host.readFile(path); });
-                if (result.config) {
-                    safeList = result.config;
-                }
-                else {
-                    safeList = {};
-                }
-                ;
-            }
-            var filesToWatch = [];
-            var searchDirs = [];
-            var exclude = [];
-            mergeTypings(typingOptions.include);
-            exclude = typingOptions.exclude || [];
-            var possibleSearchDirs = ts.map(fileNames, ts.getDirectoryPath);
-            if (projectRootPath !== undefined) {
-                possibleSearchDirs.push(projectRootPath);
-            }
-            searchDirs = ts.deduplicate(possibleSearchDirs);
-            for (var _i = 0, searchDirs_1 = searchDirs; _i < searchDirs_1.length; _i++) {
-                var searchDir = searchDirs_1[_i];
-                var packageJsonPath = ts.combinePaths(searchDir, "package.json");
-                getTypingNamesFromJson(packageJsonPath, filesToWatch);
-                var bowerJsonPath = ts.combinePaths(searchDir, "bower.json");
-                getTypingNamesFromJson(bowerJsonPath, filesToWatch);
-                var nodeModulesPath = ts.combinePaths(searchDir, "node_modules");
-                getTypingNamesFromNodeModuleFolder(nodeModulesPath);
-            }
-            getTypingNamesFromSourceFileNames(fileNames);
-            for (var name_37 in packageNameToTypingLocation) {
-                if (ts.hasProperty(inferredTypings, name_37) && !inferredTypings[name_37]) {
-                    inferredTypings[name_37] = packageNameToTypingLocation[name_37];
-                }
-            }
-            for (var _a = 0, exclude_1 = exclude; _a < exclude_1.length; _a++) {
-                var excludeTypingName = exclude_1[_a];
-                delete inferredTypings[excludeTypingName];
-            }
-            var newTypingNames = [];
-            var cachedTypingPaths = [];
-            for (var typing in inferredTypings) {
-                if (inferredTypings[typing] !== undefined) {
-                    cachedTypingPaths.push(inferredTypings[typing]);
-                }
-                else {
-                    newTypingNames.push(typing);
-                }
-            }
-            return { cachedTypingPaths: cachedTypingPaths, newTypingNames: newTypingNames, filesToWatch: filesToWatch };
-            function mergeTypings(typingNames) {
-                if (!typingNames) {
-                    return;
-                }
-                for (var _i = 0, typingNames_1 = typingNames; _i < typingNames_1.length; _i++) {
-                    var typing = typingNames_1[_i];
-                    if (!ts.hasProperty(inferredTypings, typing)) {
-                        inferredTypings[typing] = undefined;
-                    }
-                }
-            }
-            function getTypingNamesFromJson(jsonPath, filesToWatch) {
-                var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); });
-                if (result.config) {
-                    var jsonConfig = result.config;
-                    filesToWatch.push(jsonPath);
-                    if (jsonConfig.dependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.dependencies));
-                    }
-                    if (jsonConfig.devDependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.devDependencies));
-                    }
-                    if (jsonConfig.optionalDependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.optionalDependencies));
-                    }
-                    if (jsonConfig.peerDependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.peerDependencies));
-                    }
-                }
-            }
-            function getTypingNamesFromSourceFileNames(fileNames) {
-                var jsFileNames = ts.filter(fileNames, ts.hasJavaScriptFileExtension);
-                var inferredTypingNames = ts.map(jsFileNames, function (f) { return ts.removeFileExtension(ts.getBaseFileName(f.toLowerCase())); });
-                var cleanedTypingNames = ts.map(inferredTypingNames, function (f) { return f.replace(/((?:\.|-)min(?=\.|$))|((?:-|\.)\d+)/g, ""); });
-                if (safeList === undefined) {
-                    mergeTypings(cleanedTypingNames);
-                }
-                else {
-                    mergeTypings(ts.filter(cleanedTypingNames, function (f) { return ts.hasProperty(safeList, f); }));
-                }
-                var hasJsxFile = ts.forEach(fileNames, function (f) { return ts.scriptKindIs(f, undefined, 2); });
-                if (hasJsxFile) {
-                    mergeTypings(["react"]);
-                }
-            }
-            function getTypingNamesFromNodeModuleFolder(nodeModulesPath) {
-                if (!host.directoryExists(nodeModulesPath)) {
-                    return;
-                }
-                var typingNames = [];
-                var fileNames = host.readDirectory(nodeModulesPath, "*.json", undefined, 2);
-                for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
-                    var fileName = fileNames_1[_i];
-                    var normalizedFileName = ts.normalizePath(fileName);
-                    if (ts.getBaseFileName(normalizedFileName) !== "package.json") {
-                        continue;
-                    }
-                    var result = ts.readConfigFile(normalizedFileName, function (path) { return host.readFile(path); });
-                    if (!result.config) {
-                        continue;
-                    }
-                    var packageJson = result.config;
-                    if (packageJson._requiredBy &&
-                        ts.filter(packageJson._requiredBy, function (r) { return r[0] === "#" || r === "/"; }).length === 0) {
-                        continue;
-                    }
-                    if (!packageJson.name) {
-                        continue;
-                    }
-                    if (packageJson.typings) {
-                        var absolutePath = ts.getNormalizedAbsolutePath(packageJson.typings, ts.getDirectoryPath(normalizedFileName));
-                        inferredTypings[packageJson.name] = absolutePath;
-                    }
-                    else {
-                        typingNames.push(packageJson.name);
-                    }
-                }
-                mergeTypings(typingNames);
-            }
-        }
-        JsTyping.discoverTypings = discoverTypings;
-    })(JsTyping = ts.JsTyping || (ts.JsTyping = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var standardScanner = ts.createScanner(2, false, 0);
-        var jsxScanner = ts.createScanner(2, false, 1);
-        var scanner;
-        function getFormattingScanner(sourceFile, startPos, endPos) {
-            ts.Debug.assert(scanner === undefined);
-            scanner = sourceFile.languageVariant === 1 ? jsxScanner : standardScanner;
-            scanner.setText(sourceFile.text);
-            scanner.setTextPos(startPos);
-            var wasNewLine = true;
-            var leadingTrivia;
-            var trailingTrivia;
-            var savedPos;
-            var lastScanAction;
-            var lastTokenInfo;
-            return {
-                advance: advance,
-                readTokenInfo: readTokenInfo,
-                isOnToken: isOnToken,
-                getCurrentLeadingTrivia: function () { return leadingTrivia; },
-                lastTrailingTriviaWasNewLine: function () { return wasNewLine; },
-                close: function () {
-                    ts.Debug.assert(scanner !== undefined);
-                    lastTokenInfo = undefined;
-                    scanner.setText(undefined);
-                    scanner = undefined;
-                }
-            };
-            function advance() {
-                ts.Debug.assert(scanner !== undefined);
-                lastTokenInfo = undefined;
-                var isStarted = scanner.getStartPos() !== startPos;
-                if (isStarted) {
-                    if (trailingTrivia) {
-                        ts.Debug.assert(trailingTrivia.length !== 0);
-                        wasNewLine = ts.lastOrUndefined(trailingTrivia).kind === 4;
-                    }
-                    else {
-                        wasNewLine = false;
-                    }
-                }
-                leadingTrivia = undefined;
-                trailingTrivia = undefined;
-                if (!isStarted) {
-                    scanner.scan();
-                }
-                var pos = scanner.getStartPos();
-                while (pos < endPos) {
-                    var t = scanner.getToken();
-                    if (!ts.isTrivia(t)) {
-                        break;
-                    }
-                    scanner.scan();
-                    var item = {
-                        pos: pos,
-                        end: scanner.getStartPos(),
-                        kind: t
-                    };
-                    pos = scanner.getStartPos();
-                    if (!leadingTrivia) {
-                        leadingTrivia = [];
-                    }
-                    leadingTrivia.push(item);
-                }
-                savedPos = scanner.getStartPos();
-            }
-            function shouldRescanGreaterThanToken(node) {
-                if (node) {
-                    switch (node.kind) {
-                        case 29:
-                        case 64:
-                        case 65:
-                        case 45:
-                        case 44:
-                            return true;
-                    }
-                }
-                return false;
-            }
-            function shouldRescanJsxIdentifier(node) {
-                if (node.parent) {
-                    switch (node.parent.kind) {
-                        case 246:
-                        case 243:
-                        case 245:
-                        case 242:
-                            return node.kind === 69;
-                    }
-                }
-                return false;
-            }
-            function shouldRescanSlashToken(container) {
-                return container.kind === 10;
-            }
-            function shouldRescanTemplateToken(container) {
-                return container.kind === 13 ||
-                    container.kind === 14;
-            }
-            function startsWithSlashToken(t) {
-                return t === 39 || t === 61;
-            }
-            function readTokenInfo(n) {
-                ts.Debug.assert(scanner !== undefined);
-                if (!isOnToken()) {
-                    return {
-                        leadingTrivia: leadingTrivia,
-                        trailingTrivia: undefined,
-                        token: undefined
-                    };
-                }
-                var expectedScanAction = shouldRescanGreaterThanToken(n)
-                    ? 1
-                    : shouldRescanSlashToken(n)
-                        ? 2
-                        : shouldRescanTemplateToken(n)
-                            ? 3
-                            : shouldRescanJsxIdentifier(n)
-                                ? 4
-                                : 0;
-                if (lastTokenInfo && expectedScanAction === lastScanAction) {
-                    return fixTokenKind(lastTokenInfo, n);
-                }
-                if (scanner.getStartPos() !== savedPos) {
-                    ts.Debug.assert(lastTokenInfo !== undefined);
-                    scanner.setTextPos(savedPos);
-                    scanner.scan();
-                }
-                var currentToken = scanner.getToken();
-                if (expectedScanAction === 1 && currentToken === 27) {
-                    currentToken = scanner.reScanGreaterToken();
-                    ts.Debug.assert(n.kind === currentToken);
-                    lastScanAction = 1;
-                }
-                else if (expectedScanAction === 2 && startsWithSlashToken(currentToken)) {
-                    currentToken = scanner.reScanSlashToken();
-                    ts.Debug.assert(n.kind === currentToken);
-                    lastScanAction = 2;
-                }
-                else if (expectedScanAction === 3 && currentToken === 16) {
-                    currentToken = scanner.reScanTemplateToken();
-                    lastScanAction = 3;
-                }
-                else if (expectedScanAction === 4 && currentToken === 69) {
-                    currentToken = scanner.scanJsxIdentifier();
-                    lastScanAction = 4;
-                }
-                else {
-                    lastScanAction = 0;
-                }
-                var token = {
-                    pos: scanner.getStartPos(),
-                    end: scanner.getTextPos(),
-                    kind: currentToken
-                };
-                if (trailingTrivia) {
-                    trailingTrivia = undefined;
-                }
-                while (scanner.getStartPos() < endPos) {
-                    currentToken = scanner.scan();
-                    if (!ts.isTrivia(currentToken)) {
-                        break;
-                    }
-                    var trivia = {
-                        pos: scanner.getStartPos(),
-                        end: scanner.getTextPos(),
-                        kind: currentToken
-                    };
-                    if (!trailingTrivia) {
-                        trailingTrivia = [];
-                    }
-                    trailingTrivia.push(trivia);
-                    if (currentToken === 4) {
-                        scanner.scan();
-                        break;
-                    }
-                }
-                lastTokenInfo = {
-                    leadingTrivia: leadingTrivia,
-                    trailingTrivia: trailingTrivia,
-                    token: token
-                };
-                return fixTokenKind(lastTokenInfo, n);
-            }
-            function isOnToken() {
-                ts.Debug.assert(scanner !== undefined);
-                var current = (lastTokenInfo && lastTokenInfo.token.kind) || scanner.getToken();
-                var startPos = (lastTokenInfo && lastTokenInfo.token.pos) || scanner.getStartPos();
-                return startPos < endPos && current !== 1 && !ts.isTrivia(current);
-            }
-            function fixTokenKind(tokenInfo, container) {
-                if (ts.isToken(container) && tokenInfo.token.kind !== container.kind) {
-                    tokenInfo.token.kind = container.kind;
-                }
-                return tokenInfo;
-            }
-        }
-        formatting.getFormattingScanner = getFormattingScanner;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var FormattingContext = (function () {
-            function FormattingContext(sourceFile, formattingRequestKind) {
-                this.sourceFile = sourceFile;
-                this.formattingRequestKind = formattingRequestKind;
-            }
-            FormattingContext.prototype.updateContext = function (currentRange, currentTokenParent, nextRange, nextTokenParent, commonParent) {
-                ts.Debug.assert(currentRange !== undefined, "currentTokenSpan is null");
-                ts.Debug.assert(currentTokenParent !== undefined, "currentTokenParent is null");
-                ts.Debug.assert(nextRange !== undefined, "nextTokenSpan is null");
-                ts.Debug.assert(nextTokenParent !== undefined, "nextTokenParent is null");
-                ts.Debug.assert(commonParent !== undefined, "commonParent is null");
-                this.currentTokenSpan = currentRange;
-                this.currentTokenParent = currentTokenParent;
-                this.nextTokenSpan = nextRange;
-                this.nextTokenParent = nextTokenParent;
-                this.contextNode = commonParent;
-                this.contextNodeAllOnSameLine = undefined;
-                this.nextNodeAllOnSameLine = undefined;
-                this.tokensAreOnSameLine = undefined;
-                this.contextNodeBlockIsOnOneLine = undefined;
-                this.nextNodeBlockIsOnOneLine = undefined;
-            };
-            FormattingContext.prototype.ContextNodeAllOnSameLine = function () {
-                if (this.contextNodeAllOnSameLine === undefined) {
-                    this.contextNodeAllOnSameLine = this.NodeIsOnOneLine(this.contextNode);
-                }
-                return this.contextNodeAllOnSameLine;
-            };
-            FormattingContext.prototype.NextNodeAllOnSameLine = function () {
-                if (this.nextNodeAllOnSameLine === undefined) {
-                    this.nextNodeAllOnSameLine = this.NodeIsOnOneLine(this.nextTokenParent);
-                }
-                return this.nextNodeAllOnSameLine;
-            };
-            FormattingContext.prototype.TokensAreOnSameLine = function () {
-                if (this.tokensAreOnSameLine === undefined) {
-                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(this.currentTokenSpan.pos).line;
-                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(this.nextTokenSpan.pos).line;
-                    this.tokensAreOnSameLine = (startLine === endLine);
-                }
-                return this.tokensAreOnSameLine;
-            };
-            FormattingContext.prototype.ContextNodeBlockIsOnOneLine = function () {
-                if (this.contextNodeBlockIsOnOneLine === undefined) {
-                    this.contextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.contextNode);
-                }
-                return this.contextNodeBlockIsOnOneLine;
-            };
-            FormattingContext.prototype.NextNodeBlockIsOnOneLine = function () {
-                if (this.nextNodeBlockIsOnOneLine === undefined) {
-                    this.nextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.nextTokenParent);
-                }
-                return this.nextNodeBlockIsOnOneLine;
-            };
-            FormattingContext.prototype.NodeIsOnOneLine = function (node) {
-                var startLine = this.sourceFile.getLineAndCharacterOfPosition(node.getStart(this.sourceFile)).line;
-                var endLine = this.sourceFile.getLineAndCharacterOfPosition(node.getEnd()).line;
-                return startLine === endLine;
-            };
-            FormattingContext.prototype.BlockIsOnOneLine = function (node) {
-                var openBrace = ts.findChildOfKind(node, 15, this.sourceFile);
-                var closeBrace = ts.findChildOfKind(node, 16, this.sourceFile);
-                if (openBrace && closeBrace) {
-                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(openBrace.getEnd()).line;
-                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(closeBrace.getStart(this.sourceFile)).line;
-                    return startLine === endLine;
-                }
-                return false;
-            };
-            return FormattingContext;
-        }());
-        formatting.FormattingContext = FormattingContext;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Rule = (function () {
-            function Rule(Descriptor, Operation, Flag) {
-                if (Flag === void 0) { Flag = 0; }
-                this.Descriptor = Descriptor;
-                this.Operation = Operation;
-                this.Flag = Flag;
-            }
-            Rule.prototype.toString = function () {
-                return "[desc=" + this.Descriptor + "," +
-                    "operation=" + this.Operation + "," +
-                    "flag=" + this.Flag + "]";
-            };
-            return Rule;
-        }());
-        formatting.Rule = Rule;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RuleDescriptor = (function () {
-            function RuleDescriptor(LeftTokenRange, RightTokenRange) {
-                this.LeftTokenRange = LeftTokenRange;
-                this.RightTokenRange = RightTokenRange;
-            }
-            RuleDescriptor.prototype.toString = function () {
-                return "[leftRange=" + this.LeftTokenRange + "," +
-                    "rightRange=" + this.RightTokenRange + "]";
-            };
-            RuleDescriptor.create1 = function (left, right) {
-                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), formatting.Shared.TokenRange.FromToken(right));
-            };
-            RuleDescriptor.create2 = function (left, right) {
-                return RuleDescriptor.create4(left, formatting.Shared.TokenRange.FromToken(right));
-            };
-            RuleDescriptor.create3 = function (left, right) {
-                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), right);
-            };
-            RuleDescriptor.create4 = function (left, right) {
-                return new RuleDescriptor(left, right);
-            };
-            return RuleDescriptor;
-        }());
-        formatting.RuleDescriptor = RuleDescriptor;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RuleOperation = (function () {
-            function RuleOperation() {
-                this.Context = null;
-                this.Action = null;
-            }
-            RuleOperation.prototype.toString = function () {
-                return "[context=" + this.Context + "," +
-                    "action=" + this.Action + "]";
-            };
-            RuleOperation.create1 = function (action) {
-                return RuleOperation.create2(formatting.RuleOperationContext.Any, action);
-            };
-            RuleOperation.create2 = function (context, action) {
-                var result = new RuleOperation();
-                result.Context = context;
-                result.Action = action;
-                return result;
-            };
-            return RuleOperation;
-        }());
-        formatting.RuleOperation = RuleOperation;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RuleOperationContext = (function () {
-            function RuleOperationContext() {
-                var funcs = [];
-                for (var _i = 0; _i < arguments.length; _i++) {
-                    funcs[_i - 0] = arguments[_i];
-                }
-                this.customContextChecks = funcs;
-            }
-            RuleOperationContext.prototype.IsAny = function () {
-                return this === RuleOperationContext.Any;
-            };
-            RuleOperationContext.prototype.InContext = function (context) {
-                if (this.IsAny()) {
-                    return true;
-                }
-                for (var _i = 0, _a = this.customContextChecks; _i < _a.length; _i++) {
-                    var check = _a[_i];
-                    if (!check(context)) {
-                        return false;
-                    }
-                }
-                return true;
-            };
-            RuleOperationContext.Any = new RuleOperationContext();
-            return RuleOperationContext;
-        }());
-        formatting.RuleOperationContext = RuleOperationContext;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Rules = (function () {
-            function Rules() {
-                this.IgnoreBeforeComment = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.Comments), formatting.RuleOperation.create1(1));
-                this.IgnoreAfterLineComment = new formatting.Rule(formatting.RuleDescriptor.create3(2, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create1(1));
-                this.NoSpaceBeforeSemicolon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 23), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeColon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 54), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
-                this.NoSpaceBeforeQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 53), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
-                this.SpaceAfterColon = new formatting.Rule(formatting.RuleDescriptor.create3(54, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 2));
-                this.SpaceAfterQuestionMarkInConditionalOperator = new formatting.Rule(formatting.RuleDescriptor.create3(53, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConditionalOperatorContext), 2));
-                this.NoSpaceAfterQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create3(53, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterSemicolon = new formatting.Rule(formatting.RuleDescriptor.create3(23, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), 2));
-                this.SpaceBetweenCloseBraceAndElse = new formatting.Rule(formatting.RuleDescriptor.create1(16, 80), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceBetweenCloseBraceAndWhile = new formatting.Rule(formatting.RuleDescriptor.create1(16, 104), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16, formatting.Shared.TokenRange.FromTokens([18, 20, 24, 23])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeDot = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 21), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterDot = new formatting.Rule(formatting.RuleDescriptor.create3(21, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create3(20, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), 8));
-                this.FunctionOpenBraceLeftTokenRange = formatting.Shared.TokenRange.AnyIncludingMultilineComments;
-                this.SpaceBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2), 1);
-                this.TypeScriptOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([69, 3, 73]);
-                this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2), 1);
-                this.ControlOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([18, 3, 79, 100, 85, 80]);
-                this.SpaceBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2), 1);
-                this.SpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(15, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2));
-                this.SpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2));
-                this.NoSpaceBetweenEmptyBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), 8));
-                this.NewLineAfterOpenBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create3(15, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4));
-                this.NewLineBeforeCloseBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyIncludingMultilineComments, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4));
-                this.NoSpaceAfterUnaryPrefixOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.UnaryPrefixOperators, formatting.Shared.TokenRange.UnaryPrefixExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
-                this.NoSpaceAfterUnaryPreincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(41, formatting.Shared.TokenRange.UnaryPreincrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterUnaryPredecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(42, formatting.Shared.TokenRange.UnaryPredecrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeUnaryPostincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostincrementExpressions, 41), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeUnaryPostdecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostdecrementExpressions, 42), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterPostincrementWhenFollowedByAdd = new formatting.Rule(formatting.RuleDescriptor.create1(41, 35), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterAddWhenFollowedByUnaryPlus = new formatting.Rule(formatting.RuleDescriptor.create1(35, 35), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterAddWhenFollowedByPreincrement = new formatting.Rule(formatting.RuleDescriptor.create1(35, 41), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterPostdecrementWhenFollowedBySubtract = new formatting.Rule(formatting.RuleDescriptor.create1(42, 36), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterSubtractWhenFollowedByUnaryMinus = new formatting.Rule(formatting.RuleDescriptor.create1(36, 36), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterSubtractWhenFollowedByPredecrement = new formatting.Rule(formatting.RuleDescriptor.create1(36, 42), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.NoSpaceBeforeComma = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 24), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterCertainKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([102, 98, 92, 78, 94, 101, 119]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceAfterLetConstInVariableDeclaration = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([108, 74]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), 2));
-                this.NoSpaceBeforeOpenParenInFuncCall = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), 8));
-                this.SpaceAfterFunctionInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create3(87, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2));
-                this.NoSpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 8));
-                this.SpaceAfterVoidOperator = new formatting.Rule(formatting.RuleDescriptor.create3(103, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), 2));
-                this.NoSpaceBetweenReturnAndSemicolon = new formatting.Rule(formatting.RuleDescriptor.create1(94, 23), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceBetweenStatements = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([18, 79, 80, 71]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotForContext), 2));
-                this.SpaceAfterTryFinally = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([100, 85]), 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceAfterGetSetInMember = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([123, 131]), 69), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2));
-                this.SpaceBeforeBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryKeywordOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryKeywordOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.NoSpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(121, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterModuleImport = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([125, 129]), 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([115, 73, 122, 77, 81, 82, 83, 123, 106, 89, 107, 125, 126, 110, 112, 111, 131, 113, 134]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceBeforeCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([83, 106])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceAfterModuleName = new formatting.Rule(formatting.RuleDescriptor.create1(9, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsModuleDeclContext), 2));
-                this.SpaceBeforeArrow = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 34), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceAfterArrow = new formatting.Rule(formatting.RuleDescriptor.create3(34, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceAfterEllipsis = new formatting.Rule(formatting.RuleDescriptor.create1(22, 69), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterOptionalParameters = new formatting.Rule(formatting.RuleDescriptor.create3(53, formatting.Shared.TokenRange.FromTokens([18, 24])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
-                this.NoSpaceBeforeOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.TypeNames, 25), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
-                this.NoSpaceBetweenCloseParenAndAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create1(18, 25), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
-                this.NoSpaceAfterOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(25, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
-                this.NoSpaceBeforeCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 27), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
-                this.NoSpaceAfterCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(27, formatting.Shared.TokenRange.FromTokens([17, 19, 27, 24])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
-                this.NoSpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(27, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 8));
-                this.NoSpaceBetweenEmptyInterfaceBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectTypeContext), 8));
-                this.SpaceBeforeAt = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 55), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceAfterAt = new formatting.Rule(formatting.RuleDescriptor.create3(55, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterDecorator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([115, 69, 82, 77, 73, 113, 112, 110, 111, 123, 131, 19, 37])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsEndOfDecoratorContextOnSameLine), 2));
-                this.NoSpaceBetweenFunctionKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(87, 37), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 8));
-                this.SpaceAfterStarInGeneratorDeclaration = new formatting.Rule(formatting.RuleDescriptor.create3(37, formatting.Shared.TokenRange.FromTokens([69, 17])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 2));
-                this.NoSpaceBetweenYieldKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(114, 37), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 8));
-                this.SpaceBetweenYieldOrYieldStarAndOperand = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([114, 37]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 2));
-                this.SpaceBetweenAsyncAndOpenParen = new formatting.Rule(formatting.RuleDescriptor.create1(118, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsArrowFunctionContext, Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceBetweenAsyncAndFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(118, 87), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceBetweenTagAndTemplateString = new formatting.Rule(formatting.RuleDescriptor.create3(69, formatting.Shared.TokenRange.FromTokens([11, 12])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.HighPriorityCommonRules = [
-                    this.IgnoreBeforeComment, this.IgnoreAfterLineComment,
-                    this.NoSpaceBeforeColon, this.SpaceAfterColon, this.NoSpaceBeforeQuestionMark, this.SpaceAfterQuestionMarkInConditionalOperator,
-                    this.NoSpaceAfterQuestionMark,
-                    this.NoSpaceBeforeDot, this.NoSpaceAfterDot,
-                    this.NoSpaceAfterUnaryPrefixOperator,
-                    this.NoSpaceAfterUnaryPreincrementOperator, this.NoSpaceAfterUnaryPredecrementOperator,
-                    this.NoSpaceBeforeUnaryPostincrementOperator, this.NoSpaceBeforeUnaryPostdecrementOperator,
-                    this.SpaceAfterPostincrementWhenFollowedByAdd,
-                    this.SpaceAfterAddWhenFollowedByUnaryPlus, this.SpaceAfterAddWhenFollowedByPreincrement,
-                    this.SpaceAfterPostdecrementWhenFollowedBySubtract,
-                    this.SpaceAfterSubtractWhenFollowedByUnaryMinus, this.SpaceAfterSubtractWhenFollowedByPredecrement,
-                    this.NoSpaceAfterCloseBrace,
-                    this.SpaceAfterOpenBrace, this.SpaceBeforeCloseBrace, this.NewLineBeforeCloseBraceInBlockContext,
-                    this.SpaceAfterCloseBrace, this.SpaceBetweenCloseBraceAndElse, this.SpaceBetweenCloseBraceAndWhile, this.NoSpaceBetweenEmptyBraceBrackets,
-                    this.NoSpaceBetweenFunctionKeywordAndStar, this.SpaceAfterStarInGeneratorDeclaration,
-                    this.SpaceAfterFunctionInFuncDecl, this.NewLineAfterOpenBraceInBlockContext, this.SpaceAfterGetSetInMember,
-                    this.NoSpaceBetweenYieldKeywordAndStar, this.SpaceBetweenYieldOrYieldStarAndOperand,
-                    this.NoSpaceBetweenReturnAndSemicolon,
-                    this.SpaceAfterCertainKeywords,
-                    this.SpaceAfterLetConstInVariableDeclaration,
-                    this.NoSpaceBeforeOpenParenInFuncCall,
-                    this.SpaceBeforeBinaryKeywordOperator, this.SpaceAfterBinaryKeywordOperator,
-                    this.SpaceAfterVoidOperator,
-                    this.SpaceBetweenAsyncAndOpenParen, this.SpaceBetweenAsyncAndFunctionKeyword,
-                    this.NoSpaceBetweenTagAndTemplateString,
-                    this.NoSpaceAfterConstructor, this.NoSpaceAfterModuleImport,
-                    this.SpaceAfterCertainTypeScriptKeywords, this.SpaceBeforeCertainTypeScriptKeywords,
-                    this.SpaceAfterModuleName,
-                    this.SpaceBeforeArrow, this.SpaceAfterArrow,
-                    this.NoSpaceAfterEllipsis,
-                    this.NoSpaceAfterOptionalParameters,
-                    this.NoSpaceBetweenEmptyInterfaceBraceBrackets,
-                    this.NoSpaceBeforeOpenAngularBracket,
-                    this.NoSpaceBetweenCloseParenAndAngularBracket,
-                    this.NoSpaceAfterOpenAngularBracket,
-                    this.NoSpaceBeforeCloseAngularBracket,
-                    this.NoSpaceAfterCloseAngularBracket,
-                    this.NoSpaceAfterTypeAssertion,
-                    this.SpaceBeforeAt,
-                    this.NoSpaceAfterAt,
-                    this.SpaceAfterDecorator,
-                ];
-                this.LowPriorityCommonRules = [
-                    this.NoSpaceBeforeSemicolon,
-                    this.SpaceBeforeOpenBraceInControl, this.SpaceBeforeOpenBraceInFunction, this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock,
-                    this.NoSpaceBeforeComma,
-                    this.NoSpaceBeforeOpenBracket,
-                    this.NoSpaceAfterCloseBracket,
-                    this.SpaceAfterSemicolon,
-                    this.NoSpaceBeforeOpenParenInFuncDecl,
-                    this.SpaceBetweenStatements, this.SpaceAfterTryFinally
-                ];
-                this.SpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNextTokenNotCloseBracket), 2));
-                this.NoSpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.NoSpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8));
-                this.NoSpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8));
-                this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 2));
-                this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 8));
-                this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4), 1);
-                this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4), 1);
-                this.NewLineBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), 4), 1);
-                this.SpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 2));
-                this.NoSpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 8));
-                this.SpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceBetweenParens = new formatting.Rule(formatting.RuleDescriptor.create1(17, 18), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceBetweenBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(19, 20), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12, 13]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12, 13]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13, 14])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13, 14])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2));
-                this.NoSpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 8));
-            }
-            Rules.prototype.getRuleName = function (rule) {
-                var o = this;
-                for (var name_38 in o) {
-                    if (o[name_38] === rule) {
-                        return name_38;
-                    }
-                }
-                throw new Error("Unknown rule");
-            };
-            Rules.IsForContext = function (context) {
-                return context.contextNode.kind === 206;
-            };
-            Rules.IsNotForContext = function (context) {
-                return !Rules.IsForContext(context);
-            };
-            Rules.IsBinaryOpContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 187:
-                    case 188:
-                    case 195:
-                    case 154:
-                    case 162:
-                    case 163:
-                        return true;
-                    case 169:
-                    case 223:
-                    case 229:
-                    case 218:
-                    case 142:
-                    case 255:
-                    case 145:
-                    case 144:
-                        return context.currentTokenSpan.kind === 56 || context.nextTokenSpan.kind === 56;
-                    case 207:
-                        return context.currentTokenSpan.kind === 90 || context.nextTokenSpan.kind === 90;
-                    case 208:
-                        return context.currentTokenSpan.kind === 138 || context.nextTokenSpan.kind === 138;
-                }
-                return false;
-            };
-            Rules.IsNotBinaryOpContext = function (context) {
-                return !Rules.IsBinaryOpContext(context);
-            };
-            Rules.IsConditionalOperatorContext = function (context) {
-                return context.contextNode.kind === 188;
-            };
-            Rules.IsSameLineTokenOrBeforeMultilineBlockContext = function (context) {
-                return context.TokensAreOnSameLine() || Rules.IsBeforeMultilineBlockContext(context);
-            };
-            Rules.IsBeforeMultilineBlockContext = function (context) {
-                return Rules.IsBeforeBlockContext(context) && !(context.NextNodeAllOnSameLine() || context.NextNodeBlockIsOnOneLine());
-            };
-            Rules.IsMultilineBlockContext = function (context) {
-                return Rules.IsBlockContext(context) && !(context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
-            };
-            Rules.IsSingleLineBlockContext = function (context) {
-                return Rules.IsBlockContext(context) && (context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
-            };
-            Rules.IsBlockContext = function (context) {
-                return Rules.NodeIsBlockContext(context.contextNode);
-            };
-            Rules.IsBeforeBlockContext = function (context) {
-                return Rules.NodeIsBlockContext(context.nextTokenParent);
-            };
-            Rules.NodeIsBlockContext = function (node) {
-                if (Rules.NodeIsTypeScriptDeclWithBlockContext(node)) {
-                    return true;
-                }
-                switch (node.kind) {
-                    case 199:
-                    case 227:
-                    case 171:
-                    case 226:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsFunctionDeclContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 220:
-                    case 147:
-                    case 146:
-                    case 149:
-                    case 150:
-                    case 151:
-                    case 179:
-                    case 148:
-                    case 180:
-                    case 222:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsFunctionDeclarationOrFunctionExpressionContext = function (context) {
-                return context.contextNode.kind === 220 || context.contextNode.kind === 179;
-            };
-            Rules.IsTypeScriptDeclWithBlockContext = function (context) {
-                return Rules.NodeIsTypeScriptDeclWithBlockContext(context.contextNode);
-            };
-            Rules.NodeIsTypeScriptDeclWithBlockContext = function (node) {
-                switch (node.kind) {
-                    case 221:
-                    case 192:
-                    case 222:
-                    case 224:
-                    case 159:
-                    case 225:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsAfterCodeBlockContext = function (context) {
-                switch (context.currentTokenParent.kind) {
-                    case 221:
-                    case 225:
-                    case 224:
-                    case 199:
-                    case 252:
-                    case 226:
-                    case 213:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsControlDeclContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 203:
-                    case 213:
-                    case 206:
-                    case 207:
-                    case 208:
-                    case 205:
-                    case 216:
-                    case 204:
-                    case 212:
-                    case 252:
-                        return true;
-                    default:
-                        return false;
-                }
-            };
-            Rules.IsObjectContext = function (context) {
-                return context.contextNode.kind === 171;
-            };
-            Rules.IsFunctionCallContext = function (context) {
-                return context.contextNode.kind === 174;
-            };
-            Rules.IsNewContext = function (context) {
-                return context.contextNode.kind === 175;
-            };
-            Rules.IsFunctionCallOrNewContext = function (context) {
-                return Rules.IsFunctionCallContext(context) || Rules.IsNewContext(context);
-            };
-            Rules.IsPreviousTokenNotComma = function (context) {
-                return context.currentTokenSpan.kind !== 24;
-            };
-            Rules.IsNextTokenNotCloseBracket = function (context) {
-                return context.nextTokenSpan.kind !== 20;
-            };
-            Rules.IsArrowFunctionContext = function (context) {
-                return context.contextNode.kind === 180;
-            };
-            Rules.IsNonJsxSameLineTokenContext = function (context) {
-                return context.TokensAreOnSameLine() && context.contextNode.kind !== 244;
-            };
-            Rules.IsNotBeforeBlockInFunctionDeclarationContext = function (context) {
-                return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context);
-            };
-            Rules.IsEndOfDecoratorContextOnSameLine = function (context) {
-                return context.TokensAreOnSameLine() &&
-                    context.contextNode.decorators &&
-                    Rules.NodeIsInDecoratorContext(context.currentTokenParent) &&
-                    !Rules.NodeIsInDecoratorContext(context.nextTokenParent);
-            };
-            Rules.NodeIsInDecoratorContext = function (node) {
-                while (ts.isExpression(node)) {
-                    node = node.parent;
-                }
-                return node.kind === 143;
-            };
-            Rules.IsStartOfVariableDeclarationList = function (context) {
-                return context.currentTokenParent.kind === 219 &&
-                    context.currentTokenParent.getStart(context.sourceFile) === context.currentTokenSpan.pos;
-            };
-            Rules.IsNotFormatOnEnter = function (context) {
-                return context.formattingRequestKind !== 2;
-            };
-            Rules.IsModuleDeclContext = function (context) {
-                return context.contextNode.kind === 225;
-            };
-            Rules.IsObjectTypeContext = function (context) {
-                return context.contextNode.kind === 159;
-            };
-            Rules.IsTypeArgumentOrParameterOrAssertion = function (token, parent) {
-                if (token.kind !== 25 && token.kind !== 27) {
-                    return false;
-                }
-                switch (parent.kind) {
-                    case 155:
-                    case 177:
-                    case 221:
-                    case 192:
-                    case 222:
-                    case 220:
-                    case 179:
-                    case 180:
-                    case 147:
-                    case 146:
-                    case 151:
-                    case 152:
-                    case 174:
-                    case 175:
-                    case 194:
-                        return true;
-                    default:
-                        return false;
-                }
-            };
-            Rules.IsTypeArgumentOrParameterOrAssertionContext = function (context) {
-                return Rules.IsTypeArgumentOrParameterOrAssertion(context.currentTokenSpan, context.currentTokenParent) ||
-                    Rules.IsTypeArgumentOrParameterOrAssertion(context.nextTokenSpan, context.nextTokenParent);
-            };
-            Rules.IsTypeAssertionContext = function (context) {
-                return context.contextNode.kind === 177;
-            };
-            Rules.IsVoidOpContext = function (context) {
-                return context.currentTokenSpan.kind === 103 && context.currentTokenParent.kind === 183;
-            };
-            Rules.IsYieldOrYieldStarWithOperand = function (context) {
-                return context.contextNode.kind === 190 && context.contextNode.expression !== undefined;
-            };
-            return Rules;
-        }());
-        formatting.Rules = Rules;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RulesMap = (function () {
-            function RulesMap() {
-                this.map = [];
-                this.mapRowLength = 0;
-            }
-            RulesMap.create = function (rules) {
-                var result = new RulesMap();
-                result.Initialize(rules);
-                return result;
-            };
-            RulesMap.prototype.Initialize = function (rules) {
-                this.mapRowLength = 138 + 1;
-                this.map = new Array(this.mapRowLength * this.mapRowLength);
-                var rulesBucketConstructionStateList = new Array(this.map.length);
-                this.FillRules(rules, rulesBucketConstructionStateList);
-                return this.map;
-            };
-            RulesMap.prototype.FillRules = function (rules, rulesBucketConstructionStateList) {
-                var _this = this;
-                rules.forEach(function (rule) {
-                    _this.FillRule(rule, rulesBucketConstructionStateList);
-                });
-            };
-            RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
-                var rulesBucketIndex = (row * this.mapRowLength) + column;
-                return rulesBucketIndex;
-            };
-            RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
-                var _this = this;
-                var specificRule = rule.Descriptor.LeftTokenRange !== formatting.Shared.TokenRange.Any &&
-                    rule.Descriptor.RightTokenRange !== formatting.Shared.TokenRange.Any;
-                rule.Descriptor.LeftTokenRange.GetTokens().forEach(function (left) {
-                    rule.Descriptor.RightTokenRange.GetTokens().forEach(function (right) {
-                        var rulesBucketIndex = _this.GetRuleBucketIndex(left, right);
-                        var rulesBucket = _this.map[rulesBucketIndex];
-                        if (rulesBucket === undefined) {
-                            rulesBucket = _this.map[rulesBucketIndex] = new RulesBucket();
-                        }
-                        rulesBucket.AddRule(rule, specificRule, rulesBucketConstructionStateList, rulesBucketIndex);
-                    });
-                });
-            };
-            RulesMap.prototype.GetRule = function (context) {
-                var bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
-                var bucket = this.map[bucketIndex];
-                if (bucket != null) {
-                    for (var _i = 0, _a = bucket.Rules(); _i < _a.length; _i++) {
-                        var rule = _a[_i];
-                        if (rule.Operation.Context.InContext(context)) {
-                            return rule;
-                        }
-                    }
-                }
-                return null;
-            };
-            return RulesMap;
-        }());
-        formatting.RulesMap = RulesMap;
-        var MaskBitSize = 5;
-        var Mask = 0x1f;
-        (function (RulesPosition) {
-            RulesPosition[RulesPosition["IgnoreRulesSpecific"] = 0] = "IgnoreRulesSpecific";
-            RulesPosition[RulesPosition["IgnoreRulesAny"] = MaskBitSize * 1] = "IgnoreRulesAny";
-            RulesPosition[RulesPosition["ContextRulesSpecific"] = MaskBitSize * 2] = "ContextRulesSpecific";
-            RulesPosition[RulesPosition["ContextRulesAny"] = MaskBitSize * 3] = "ContextRulesAny";
-            RulesPosition[RulesPosition["NoContextRulesSpecific"] = MaskBitSize * 4] = "NoContextRulesSpecific";
-            RulesPosition[RulesPosition["NoContextRulesAny"] = MaskBitSize * 5] = "NoContextRulesAny";
-        })(formatting.RulesPosition || (formatting.RulesPosition = {}));
-        var RulesPosition = formatting.RulesPosition;
-        var RulesBucketConstructionState = (function () {
-            function RulesBucketConstructionState() {
-                this.rulesInsertionIndexBitmap = 0;
-            }
-            RulesBucketConstructionState.prototype.GetInsertionIndex = function (maskPosition) {
-                var index = 0;
-                var pos = 0;
-                var indexBitmap = this.rulesInsertionIndexBitmap;
-                while (pos <= maskPosition) {
-                    index += (indexBitmap & Mask);
-                    indexBitmap >>= MaskBitSize;
-                    pos += MaskBitSize;
-                }
-                return index;
-            };
-            RulesBucketConstructionState.prototype.IncreaseInsertionIndex = function (maskPosition) {
-                var value = (this.rulesInsertionIndexBitmap >> maskPosition) & Mask;
-                value++;
-                ts.Debug.assert((value & Mask) === value, "Adding more rules into the sub-bucket than allowed. Maximum allowed is 32 rules.");
-                var temp = this.rulesInsertionIndexBitmap & ~(Mask << maskPosition);
-                temp |= value << maskPosition;
-                this.rulesInsertionIndexBitmap = temp;
-            };
-            return RulesBucketConstructionState;
-        }());
-        formatting.RulesBucketConstructionState = RulesBucketConstructionState;
-        var RulesBucket = (function () {
-            function RulesBucket() {
-                this.rules = [];
-            }
-            RulesBucket.prototype.Rules = function () {
-                return this.rules;
-            };
-            RulesBucket.prototype.AddRule = function (rule, specificTokens, constructionState, rulesBucketIndex) {
-                var position;
-                if (rule.Operation.Action === 1) {
-                    position = specificTokens ?
-                        RulesPosition.IgnoreRulesSpecific :
-                        RulesPosition.IgnoreRulesAny;
-                }
-                else if (!rule.Operation.Context.IsAny()) {
-                    position = specificTokens ?
-                        RulesPosition.ContextRulesSpecific :
-                        RulesPosition.ContextRulesAny;
-                }
-                else {
-                    position = specificTokens ?
-                        RulesPosition.NoContextRulesSpecific :
-                        RulesPosition.NoContextRulesAny;
-                }
-                var state = constructionState[rulesBucketIndex];
-                if (state === undefined) {
-                    state = constructionState[rulesBucketIndex] = new RulesBucketConstructionState();
-                }
-                var index = state.GetInsertionIndex(position);
-                this.rules.splice(index, 0, rule);
-                state.IncreaseInsertionIndex(position);
-            };
-            return RulesBucket;
-        }());
-        formatting.RulesBucket = RulesBucket;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Shared;
-        (function (Shared) {
-            var TokenRangeAccess = (function () {
-                function TokenRangeAccess(from, to, except) {
-                    this.tokens = [];
-                    for (var token = from; token <= to; token++) {
-                        if (ts.indexOf(except, token) < 0) {
-                            this.tokens.push(token);
-                        }
-                    }
-                }
-                TokenRangeAccess.prototype.GetTokens = function () {
-                    return this.tokens;
-                };
-                TokenRangeAccess.prototype.Contains = function (token) {
-                    return this.tokens.indexOf(token) >= 0;
-                };
-                return TokenRangeAccess;
-            }());
-            Shared.TokenRangeAccess = TokenRangeAccess;
-            var TokenValuesAccess = (function () {
-                function TokenValuesAccess(tks) {
-                    this.tokens = tks && tks.length ? tks : [];
-                }
-                TokenValuesAccess.prototype.GetTokens = function () {
-                    return this.tokens;
-                };
-                TokenValuesAccess.prototype.Contains = function (token) {
-                    return this.tokens.indexOf(token) >= 0;
-                };
-                return TokenValuesAccess;
-            }());
-            Shared.TokenValuesAccess = TokenValuesAccess;
-            var TokenSingleValueAccess = (function () {
-                function TokenSingleValueAccess(token) {
-                    this.token = token;
-                }
-                TokenSingleValueAccess.prototype.GetTokens = function () {
-                    return [this.token];
-                };
-                TokenSingleValueAccess.prototype.Contains = function (tokenValue) {
-                    return tokenValue === this.token;
-                };
-                return TokenSingleValueAccess;
-            }());
-            Shared.TokenSingleValueAccess = TokenSingleValueAccess;
-            var TokenAllAccess = (function () {
-                function TokenAllAccess() {
-                }
-                TokenAllAccess.prototype.GetTokens = function () {
-                    var result = [];
-                    for (var token = 0; token <= 138; token++) {
-                        result.push(token);
-                    }
-                    return result;
-                };
-                TokenAllAccess.prototype.Contains = function (tokenValue) {
-                    return true;
-                };
-                TokenAllAccess.prototype.toString = function () {
-                    return "[allTokens]";
-                };
-                return TokenAllAccess;
-            }());
-            Shared.TokenAllAccess = TokenAllAccess;
-            var TokenRange = (function () {
-                function TokenRange(tokenAccess) {
-                    this.tokenAccess = tokenAccess;
-                }
-                TokenRange.FromToken = function (token) {
-                    return new TokenRange(new TokenSingleValueAccess(token));
-                };
-                TokenRange.FromTokens = function (tokens) {
-                    return new TokenRange(new TokenValuesAccess(tokens));
-                };
-                TokenRange.FromRange = function (f, to, except) {
-                    if (except === void 0) { except = []; }
-                    return new TokenRange(new TokenRangeAccess(f, to, except));
-                };
-                TokenRange.AllTokens = function () {
-                    return new TokenRange(new TokenAllAccess());
-                };
-                TokenRange.prototype.GetTokens = function () {
-                    return this.tokenAccess.GetTokens();
-                };
-                TokenRange.prototype.Contains = function (token) {
-                    return this.tokenAccess.Contains(token);
-                };
-                TokenRange.prototype.toString = function () {
-                    return this.tokenAccess.toString();
-                };
-                TokenRange.Any = TokenRange.AllTokens();
-                TokenRange.AnyIncludingMultilineComments = TokenRange.FromTokens(TokenRange.Any.GetTokens().concat([3]));
-                TokenRange.Keywords = TokenRange.FromRange(70, 138);
-                TokenRange.BinaryOperators = TokenRange.FromRange(25, 68);
-                TokenRange.BinaryKeywordOperators = TokenRange.FromTokens([90, 91, 138, 116, 124]);
-                TokenRange.UnaryPrefixOperators = TokenRange.FromTokens([41, 42, 50, 49]);
-                TokenRange.UnaryPrefixExpressions = TokenRange.FromTokens([8, 69, 17, 19, 15, 97, 92]);
-                TokenRange.UnaryPreincrementExpressions = TokenRange.FromTokens([69, 17, 97, 92]);
-                TokenRange.UnaryPostincrementExpressions = TokenRange.FromTokens([69, 18, 20, 92]);
-                TokenRange.UnaryPredecrementExpressions = TokenRange.FromTokens([69, 17, 97, 92]);
-                TokenRange.UnaryPostdecrementExpressions = TokenRange.FromTokens([69, 18, 20, 92]);
-                TokenRange.Comments = TokenRange.FromTokens([2, 3]);
-                TokenRange.TypeNames = TokenRange.FromTokens([69, 130, 132, 120, 133, 103, 117]);
-                return TokenRange;
-            }());
-            Shared.TokenRange = TokenRange;
-        })(Shared = formatting.Shared || (formatting.Shared = {}));
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RulesProvider = (function () {
-            function RulesProvider() {
-                this.globalRules = new formatting.Rules();
-            }
-            RulesProvider.prototype.getRuleName = function (rule) {
-                return this.globalRules.getRuleName(rule);
-            };
-            RulesProvider.prototype.getRuleByName = function (name) {
-                return this.globalRules[name];
-            };
-            RulesProvider.prototype.getRulesMap = function () {
-                return this.rulesMap;
-            };
-            RulesProvider.prototype.ensureUpToDate = function (options) {
-                if (this.options == null || !ts.compareDataObjects(this.options, options)) {
-                    var activeRules = this.createActiveRules(options);
-                    var rulesMap = formatting.RulesMap.create(activeRules);
-                    this.activeRules = activeRules;
-                    this.rulesMap = rulesMap;
-                    this.options = ts.clone(options);
-                }
-            };
-            RulesProvider.prototype.createActiveRules = function (options) {
-                var rules = this.globalRules.HighPriorityCommonRules.slice(0);
-                if (options.InsertSpaceAfterCommaDelimiter) {
-                    rules.push(this.globalRules.SpaceAfterComma);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterComma);
-                }
-                if (options.InsertSpaceAfterFunctionKeywordForAnonymousFunctions) {
-                    rules.push(this.globalRules.SpaceAfterAnonymousFunctionKeyword);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterAnonymousFunctionKeyword);
-                }
-                if (options.InsertSpaceAfterKeywordsInControlFlowStatements) {
-                    rules.push(this.globalRules.SpaceAfterKeywordInControl);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterKeywordInControl);
-                }
-                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis) {
-                    rules.push(this.globalRules.SpaceAfterOpenParen);
-                    rules.push(this.globalRules.SpaceBeforeCloseParen);
-                    rules.push(this.globalRules.NoSpaceBetweenParens);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenParen);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseParen);
-                    rules.push(this.globalRules.NoSpaceBetweenParens);
-                }
-                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets) {
-                    rules.push(this.globalRules.SpaceAfterOpenBracket);
-                    rules.push(this.globalRules.SpaceBeforeCloseBracket);
-                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenBracket);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseBracket);
-                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
-                }
-                if (options.InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces) {
-                    rules.push(this.globalRules.SpaceAfterTemplateHeadAndMiddle);
-                    rules.push(this.globalRules.SpaceBeforeTemplateMiddleAndTail);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterTemplateHeadAndMiddle);
-                    rules.push(this.globalRules.NoSpaceBeforeTemplateMiddleAndTail);
-                }
-                if (options.InsertSpaceAfterSemicolonInForStatements) {
-                    rules.push(this.globalRules.SpaceAfterSemicolonInFor);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterSemicolonInFor);
-                }
-                if (options.InsertSpaceBeforeAndAfterBinaryOperators) {
-                    rules.push(this.globalRules.SpaceBeforeBinaryOperator);
-                    rules.push(this.globalRules.SpaceAfterBinaryOperator);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceBeforeBinaryOperator);
-                    rules.push(this.globalRules.NoSpaceAfterBinaryOperator);
-                }
-                if (options.PlaceOpenBraceOnNewLineForControlBlocks) {
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInControl);
-                }
-                if (options.PlaceOpenBraceOnNewLineForFunctions) {
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInFunction);
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock);
-                }
-                rules = rules.concat(this.globalRules.LowPriorityCommonRules);
-                return rules;
-            };
-            return RulesProvider;
-        }());
-        formatting.RulesProvider = RulesProvider;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        function formatOnEnter(position, sourceFile, rulesProvider, options) {
-            var line = sourceFile.getLineAndCharacterOfPosition(position).line;
-            if (line === 0) {
-                return [];
-            }
-            var endOfFormatSpan = ts.getEndLinePosition(line, sourceFile);
-            while (ts.isWhiteSpace(sourceFile.text.charCodeAt(endOfFormatSpan)) && !ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
-                endOfFormatSpan--;
-            }
-            var span = {
-                pos: ts.getStartPositionOfLine(line - 1, sourceFile),
-                end: endOfFormatSpan + 1
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 2);
-        }
-        formatting.formatOnEnter = formatOnEnter;
-        function formatOnSemicolon(position, sourceFile, rulesProvider, options) {
-            return formatOutermostParent(position, 23, sourceFile, options, rulesProvider, 3);
-        }
-        formatting.formatOnSemicolon = formatOnSemicolon;
-        function formatOnClosingCurly(position, sourceFile, rulesProvider, options) {
-            return formatOutermostParent(position, 16, sourceFile, options, rulesProvider, 4);
-        }
-        formatting.formatOnClosingCurly = formatOnClosingCurly;
-        function formatDocument(sourceFile, rulesProvider, options) {
-            var span = {
-                pos: 0,
-                end: sourceFile.text.length
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 0);
-        }
-        formatting.formatDocument = formatDocument;
-        function formatSelection(start, end, sourceFile, rulesProvider, options) {
-            var span = {
-                pos: ts.getLineStartPositionForPosition(start, sourceFile),
-                end: end
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 1);
-        }
-        formatting.formatSelection = formatSelection;
-        function formatOutermostParent(position, expectedLastToken, sourceFile, options, rulesProvider, requestKind) {
-            var parent = findOutermostParent(position, expectedLastToken, sourceFile);
-            if (!parent) {
-                return [];
-            }
-            var span = {
-                pos: ts.getLineStartPositionForPosition(parent.getStart(sourceFile), sourceFile),
-                end: parent.end
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, requestKind);
-        }
-        function findOutermostParent(position, expectedTokenKind, sourceFile) {
-            var precedingToken = ts.findPrecedingToken(position, sourceFile);
-            if (!precedingToken ||
-                precedingToken.kind !== expectedTokenKind ||
-                position !== precedingToken.getEnd()) {
-                return undefined;
-            }
-            var current = precedingToken;
-            while (current &&
-                current.parent &&
-                current.parent.end === precedingToken.end &&
-                !isListElement(current.parent, current)) {
-                current = current.parent;
-            }
-            return current;
-        }
-        function isListElement(parent, node) {
-            switch (parent.kind) {
-                case 221:
-                case 222:
-                    return ts.rangeContainsRange(parent.members, node);
-                case 225:
-                    var body = parent.body;
-                    return body && body.kind === 199 && ts.rangeContainsRange(body.statements, node);
-                case 256:
-                case 199:
-                case 226:
-                    return ts.rangeContainsRange(parent.statements, node);
-                case 252:
-                    return ts.rangeContainsRange(parent.block.statements, node);
-            }
-            return false;
-        }
-        function findEnclosingNode(range, sourceFile) {
-            return find(sourceFile);
-            function find(n) {
-                var candidate = ts.forEachChild(n, function (c) { return ts.startEndContainsRange(c.getStart(sourceFile), c.end, range) && c; });
-                if (candidate) {
-                    var result = find(candidate);
-                    if (result) {
-                        return result;
-                    }
-                }
-                return n;
-            }
-        }
-        function prepareRangeContainsErrorFunction(errors, originalRange) {
-            if (!errors.length) {
-                return rangeHasNoErrors;
-            }
-            var sorted = errors
-                .filter(function (d) { return ts.rangeOverlapsWithStartEnd(originalRange, d.start, d.start + d.length); })
-                .sort(function (e1, e2) { return e1.start - e2.start; });
-            if (!sorted.length) {
-                return rangeHasNoErrors;
-            }
-            var index = 0;
-            return function (r) {
-                while (true) {
-                    if (index >= sorted.length) {
-                        return false;
-                    }
-                    var error = sorted[index];
-                    if (r.end <= error.start) {
-                        return false;
-                    }
-                    if (ts.startEndOverlapsWithStartEnd(r.pos, r.end, error.start, error.start + error.length)) {
-                        return true;
-                    }
-                    index++;
-                }
-            };
-            function rangeHasNoErrors(r) {
-                return false;
-            }
-        }
-        function getScanStartPosition(enclosingNode, originalRange, sourceFile) {
-            var start = enclosingNode.getStart(sourceFile);
-            if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
-                return start;
-            }
-            var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile);
-            if (!precedingToken) {
-                return enclosingNode.pos;
-            }
-            if (precedingToken.end >= originalRange.pos) {
-                return enclosingNode.pos;
-            }
-            return precedingToken.end;
-        }
-        function getOwnOrInheritedDelta(n, options, sourceFile) {
-            var previousLine = -1;
-            var child;
-            while (n) {
-                var line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
-                if (previousLine !== -1 && line !== previousLine) {
-                    break;
-                }
-                if (formatting.SmartIndenter.shouldIndentChildNode(n, child)) {
-                    return options.IndentSize;
-                }
-                previousLine = line;
-                child = n;
-                n = n.parent;
-            }
-            return 0;
-        }
-        function formatSpan(originalRange, sourceFile, options, rulesProvider, requestKind) {
-            var rangeContainsError = prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange);
-            var formattingContext = new formatting.FormattingContext(sourceFile, requestKind);
-            var enclosingNode = findEnclosingNode(originalRange, sourceFile);
-            var formattingScanner = formatting.getFormattingScanner(sourceFile, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end);
-            var initialIndentation = formatting.SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options);
-            var previousRangeHasError;
-            var previousRange;
-            var previousParent;
-            var previousRangeStartLine;
-            var lastIndentedLine;
-            var indentationOnLastIndentedLine;
-            var edits = [];
-            formattingScanner.advance();
-            if (formattingScanner.isOnToken()) {
-                var startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
-                var undecoratedStartLine = startLine;
-                if (enclosingNode.decorators) {
-                    undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
-                }
-                var delta = getOwnOrInheritedDelta(enclosingNode, options, sourceFile);
-                processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
-            }
-            if (!formattingScanner.isOnToken()) {
-                var leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
-                if (leadingTrivia) {
-                    processTrivia(leadingTrivia, enclosingNode, enclosingNode, undefined);
-                    trimTrailingWhitespacesForRemainingRange();
-                }
-            }
-            formattingScanner.close();
-            return edits;
-            function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) {
-                if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) ||
-                    ts.rangeContainsStartEnd(range, startPos, endPos)) {
-                    if (inheritedIndentation !== -1) {
-                        return inheritedIndentation;
-                    }
-                }
-                else {
-                    var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
-                    var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile);
-                    var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
-                    if (startLine !== parentStartLine || startPos === column) {
-                        return column;
-                    }
-                }
-                return -1;
-            }
-            function computeIndentation(node, startLine, inheritedIndentation, parent, parentDynamicIndentation, effectiveParentStartLine) {
-                var indentation = inheritedIndentation;
-                var delta = formatting.SmartIndenter.shouldIndentChildNode(node) ? options.IndentSize : 0;
-                if (effectiveParentStartLine === startLine) {
-                    indentation = startLine === lastIndentedLine
-                        ? indentationOnLastIndentedLine
-                        : parentDynamicIndentation.getIndentation();
-                    delta = Math.min(options.IndentSize, parentDynamicIndentation.getDelta(node) + delta);
-                }
-                else if (indentation === -1) {
-                    if (formatting.SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement(parent, node, startLine, sourceFile)) {
-                        indentation = parentDynamicIndentation.getIndentation();
-                    }
-                    else {
-                        indentation = parentDynamicIndentation.getIndentation() + parentDynamicIndentation.getDelta(node);
-                    }
-                }
-                return {
-                    indentation: indentation,
-                    delta: delta
-                };
-            }
-            function getFirstNonDecoratorTokenOfNode(node) {
-                if (node.modifiers && node.modifiers.length) {
-                    return node.modifiers[0].kind;
-                }
-                switch (node.kind) {
-                    case 221: return 73;
-                    case 222: return 107;
-                    case 220: return 87;
-                    case 224: return 224;
-                    case 149: return 123;
-                    case 150: return 131;
-                    case 147:
-                        if (node.asteriskToken) {
-                            return 37;
-                        }
-                    case 145:
-                    case 142:
-                        return node.name.kind;
-                }
-            }
-            function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
-                return {
-                    getIndentationForComment: function (kind, tokenIndentation, container) {
-                        switch (kind) {
-                            case 16:
-                            case 20:
-                            case 18:
-                                return indentation + getEffectiveDelta(delta, container);
-                        }
-                        return tokenIndentation !== -1 ? tokenIndentation : indentation;
-                    },
-                    getIndentationForToken: function (line, kind, container) {
-                        if (nodeStartLine !== line && node.decorators) {
-                            if (kind === getFirstNonDecoratorTokenOfNode(node)) {
-                                return indentation;
-                            }
-                        }
-                        switch (kind) {
-                            case 15:
-                            case 16:
-                            case 19:
-                            case 20:
-                            case 17:
-                            case 18:
-                            case 80:
-                            case 104:
-                            case 55:
-                                return indentation;
-                            default:
-                                return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
-                        }
-                    },
-                    getIndentation: function () { return indentation; },
-                    getDelta: function (child) { return getEffectiveDelta(delta, child); },
-                    recomputeIndentation: function (lineAdded) {
-                        if (node.parent && formatting.SmartIndenter.shouldIndentChildNode(node.parent, node)) {
-                            if (lineAdded) {
-                                indentation += options.IndentSize;
-                            }
-                            else {
-                                indentation -= options.IndentSize;
-                            }
-                            if (formatting.SmartIndenter.shouldIndentChildNode(node)) {
-                                delta = options.IndentSize;
-                            }
-                            else {
-                                delta = 0;
-                            }
-                        }
-                    }
-                };
-                function getEffectiveDelta(delta, child) {
-                    return formatting.SmartIndenter.nodeWillIndentChild(node, child, true) ? delta : 0;
-                }
-            }
-            function processNode(node, contextNode, nodeStartLine, undecoratedNodeStartLine, indentation, delta) {
-                if (!ts.rangeOverlapsWithStartEnd(originalRange, node.getStart(sourceFile), node.getEnd())) {
-                    return;
-                }
-                var nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
-                var childContextNode = contextNode;
-                ts.forEachChild(node, function (child) {
-                    processChildNode(child, -1, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, false);
-                }, function (nodes) {
-                    processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
-                });
-                while (formattingScanner.isOnToken()) {
-                    var tokenInfo = formattingScanner.readTokenInfo(node);
-                    if (tokenInfo.token.end > node.end) {
-                        break;
-                    }
-                    consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation);
-                }
-                function processChildNode(child, inheritedIndentation, parent, parentDynamicIndentation, parentStartLine, undecoratedParentStartLine, isListItem, isFirstListItem) {
-                    var childStartPos = child.getStart(sourceFile);
-                    var childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
-                    var undecoratedChildStartLine = childStartLine;
-                    if (child.decorators) {
-                        undecoratedChildStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(child, sourceFile)).line;
-                    }
-                    var childIndentationAmount = -1;
-                    if (isListItem) {
-                        childIndentationAmount = tryComputeIndentationForListItem(childStartPos, child.end, parentStartLine, originalRange, inheritedIndentation);
-                        if (childIndentationAmount !== -1) {
-                            inheritedIndentation = childIndentationAmount;
-                        }
-                    }
-                    if (!ts.rangeOverlapsWithStartEnd(originalRange, child.pos, child.end)) {
-                        return inheritedIndentation;
-                    }
-                    if (child.getFullWidth() === 0) {
-                        return inheritedIndentation;
-                    }
-                    while (formattingScanner.isOnToken()) {
-                        var tokenInfo = formattingScanner.readTokenInfo(node);
-                        if (tokenInfo.token.end > childStartPos) {
-                            break;
-                        }
-                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation);
-                    }
-                    if (!formattingScanner.isOnToken()) {
-                        return inheritedIndentation;
-                    }
-                    if (ts.isToken(child)) {
-                        var tokenInfo = formattingScanner.readTokenInfo(child);
-                        ts.Debug.assert(tokenInfo.token.end === child.end);
-                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
-                        return inheritedIndentation;
-                    }
-                    var effectiveParentStartLine = child.kind === 143 ? childStartLine : undecoratedParentStartLine;
-                    var childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
-                    processNode(child, childContextNode, childStartLine, undecoratedChildStartLine, childIndentation.indentation, childIndentation.delta);
-                    childContextNode = node;
-                    if (isFirstListItem && parent.kind === 170 && inheritedIndentation === -1) {
-                        inheritedIndentation = childIndentation.indentation;
-                    }
-                    return inheritedIndentation;
-                }
-                function processChildNodes(nodes, parent, parentStartLine, parentDynamicIndentation) {
-                    var listStartToken = getOpenTokenForList(parent, nodes);
-                    var listEndToken = getCloseTokenForOpenToken(listStartToken);
-                    var listDynamicIndentation = parentDynamicIndentation;
-                    var startLine = parentStartLine;
-                    if (listStartToken !== 0) {
-                        while (formattingScanner.isOnToken()) {
-                            var tokenInfo = formattingScanner.readTokenInfo(parent);
-                            if (tokenInfo.token.end > nodes.pos) {
-                                break;
-                            }
-                            else if (tokenInfo.token.kind === listStartToken) {
-                                startLine = sourceFile.getLineAndCharacterOfPosition(tokenInfo.token.pos).line;
-                                var indentation_1 = computeIndentation(tokenInfo.token, startLine, -1, parent, parentDynamicIndentation, parentStartLine);
-                                listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation_1.indentation, indentation_1.delta);
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
-                            }
-                            else {
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation);
-                            }
-                        }
-                    }
-                    var inheritedIndentation = -1;
-                    for (var i = 0; i < nodes.length; i++) {
-                        var child = nodes[i];
-                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, true, i === 0);
-                    }
-                    if (listEndToken !== 0) {
-                        if (formattingScanner.isOnToken()) {
-                            var tokenInfo = formattingScanner.readTokenInfo(parent);
-                            if (tokenInfo.token.kind === listEndToken && ts.rangeContainsRange(parent, tokenInfo.token)) {
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
-                            }
-                        }
-                    }
-                }
-                function consumeTokenAndAdvanceScanner(currentTokenInfo, parent, dynamicIndentation, container) {
-                    ts.Debug.assert(ts.rangeContainsRange(parent, currentTokenInfo.token));
-                    var lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
-                    var indentToken = false;
-                    if (currentTokenInfo.leadingTrivia) {
-                        processTrivia(currentTokenInfo.leadingTrivia, parent, childContextNode, dynamicIndentation);
-                    }
-                    var lineAdded;
-                    var isTokenInRange = ts.rangeContainsRange(originalRange, currentTokenInfo.token);
-                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
-                    if (isTokenInRange) {
-                        var rangeHasError = rangeContainsError(currentTokenInfo.token);
-                        var savePreviousRange = previousRange;
-                        lineAdded = processRange(currentTokenInfo.token, tokenStart, parent, childContextNode, dynamicIndentation);
-                        if (rangeHasError) {
-                            indentToken = false;
-                        }
-                        else {
-                            if (lineAdded !== undefined) {
-                                indentToken = lineAdded;
-                            }
-                            else {
-                                var prevEndLine = savePreviousRange && sourceFile.getLineAndCharacterOfPosition(savePreviousRange.end).line;
-                                indentToken = lastTriviaWasNewLine && tokenStart.line !== prevEndLine;
-                            }
-                        }
-                    }
-                    if (currentTokenInfo.trailingTrivia) {
-                        processTrivia(currentTokenInfo.trailingTrivia, parent, childContextNode, dynamicIndentation);
-                    }
-                    if (indentToken) {
-                        var tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
-                            dynamicIndentation.getIndentationForToken(tokenStart.line, currentTokenInfo.token.kind, container) :
-                            -1;
-                        var indentNextTokenOrTrivia = true;
-                        if (currentTokenInfo.leadingTrivia) {
-                            var commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
-                            for (var _i = 0, _a = currentTokenInfo.leadingTrivia; _i < _a.length; _i++) {
-                                var triviaItem = _a[_i];
-                                var triviaInRange = ts.rangeContainsRange(originalRange, triviaItem);
-                                switch (triviaItem.kind) {
-                                    case 3:
-                                        if (triviaInRange) {
-                                            indentMultilineComment(triviaItem, commentIndentation, !indentNextTokenOrTrivia);
-                                        }
-                                        indentNextTokenOrTrivia = false;
-                                        break;
-                                    case 2:
-                                        if (indentNextTokenOrTrivia && triviaInRange) {
-                                            insertIndentation(triviaItem.pos, commentIndentation, false);
-                                        }
-                                        indentNextTokenOrTrivia = false;
-                                        break;
-                                    case 4:
-                                        indentNextTokenOrTrivia = true;
-                                        break;
-                                }
-                            }
-                        }
-                        if (tokenIndentation !== -1 && indentNextTokenOrTrivia) {
-                            insertIndentation(currentTokenInfo.token.pos, tokenIndentation, lineAdded);
-                            lastIndentedLine = tokenStart.line;
-                            indentationOnLastIndentedLine = tokenIndentation;
-                        }
-                    }
-                    formattingScanner.advance();
-                    childContextNode = parent;
-                }
-            }
-            function processTrivia(trivia, parent, contextNode, dynamicIndentation) {
-                for (var _i = 0, trivia_1 = trivia; _i < trivia_1.length; _i++) {
-                    var triviaItem = trivia_1[_i];
-                    if (ts.isComment(triviaItem.kind) && ts.rangeContainsRange(originalRange, triviaItem)) {
-                        var triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
-                        processRange(triviaItem, triviaItemStart, parent, contextNode, dynamicIndentation);
-                    }
-                }
-            }
-            function processRange(range, rangeStart, parent, contextNode, dynamicIndentation) {
-                var rangeHasError = rangeContainsError(range);
-                var lineAdded;
-                if (!rangeHasError && !previousRangeHasError) {
-                    if (!previousRange) {
-                        var originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
-                        trimTrailingWhitespacesForLines(originalStart.line, rangeStart.line);
-                    }
-                    else {
-                        lineAdded =
-                            processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation);
-                    }
-                }
-                previousRange = range;
-                previousParent = parent;
-                previousRangeStartLine = rangeStart.line;
-                previousRangeHasError = rangeHasError;
-                return lineAdded;
-            }
-            function processPair(currentItem, currentStartLine, currentParent, previousItem, previousStartLine, previousParent, contextNode, dynamicIndentation) {
-                formattingContext.updateContext(previousItem, previousParent, currentItem, currentParent, contextNode);
-                var rule = rulesProvider.getRulesMap().GetRule(formattingContext);
-                var trimTrailingWhitespaces;
-                var lineAdded;
-                if (rule) {
-                    applyRuleEdits(rule, previousItem, previousStartLine, currentItem, currentStartLine);
-                    if (rule.Operation.Action & (2 | 8) && currentStartLine !== previousStartLine) {
-                        lineAdded = false;
-                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(false);
-                        }
-                    }
-                    else if (rule.Operation.Action & 4 && currentStartLine === previousStartLine) {
-                        lineAdded = true;
-                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(true);
-                        }
-                    }
-                    trimTrailingWhitespaces = !(rule.Operation.Action & 8) && rule.Flag !== 1;
-                }
-                else {
-                    trimTrailingWhitespaces = true;
-                }
-                if (currentStartLine !== previousStartLine && trimTrailingWhitespaces) {
-                    trimTrailingWhitespacesForLines(previousStartLine, currentStartLine, previousItem);
-                }
-                return lineAdded;
-            }
-            function insertIndentation(pos, indentation, lineAdded) {
-                var indentationString = getIndentationString(indentation, options);
-                if (lineAdded) {
-                    recordReplace(pos, 0, indentationString);
-                }
-                else {
-                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
-                    var startLinePosition = ts.getStartPositionOfLine(tokenStart.line, sourceFile);
-                    if (indentation !== tokenStart.character || indentationIsDifferent(indentationString, startLinePosition)) {
-                        recordReplace(startLinePosition, tokenStart.character, indentationString);
-                    }
-                }
-            }
-            function indentationIsDifferent(indentationString, startLinePosition) {
-                return indentationString !== sourceFile.text.substr(startLinePosition, indentationString.length);
-            }
-            function indentMultilineComment(commentRange, indentation, firstLineIsIndented) {
-                var startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
-                var endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
-                var parts;
-                if (startLine === endLine) {
-                    if (!firstLineIsIndented) {
-                        insertIndentation(commentRange.pos, indentation, false);
-                    }
-                    return;
-                }
-                else {
-                    parts = [];
-                    var startPos = commentRange.pos;
-                    for (var line = startLine; line < endLine; line++) {
-                        var endOfLine = ts.getEndLinePosition(line, sourceFile);
-                        parts.push({ pos: startPos, end: endOfLine });
-                        startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
-                    }
-                    parts.push({ pos: startPos, end: commentRange.end });
-                }
-                var startLinePos = ts.getStartPositionOfLine(startLine, sourceFile);
-                var nonWhitespaceColumnInFirstPart = formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(startLinePos, parts[0].pos, sourceFile, options);
-                if (indentation === nonWhitespaceColumnInFirstPart.column) {
-                    return;
-                }
-                var startIndex = 0;
-                if (firstLineIsIndented) {
-                    startIndex = 1;
-                    startLine++;
-                }
-                var delta = indentation - nonWhitespaceColumnInFirstPart.column;
-                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
-                    var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
-                    var nonWhitespaceCharacterAndColumn = i === 0
-                        ? nonWhitespaceColumnInFirstPart
-                        : formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(parts[i].pos, parts[i].end, sourceFile, options);
-                    var newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
-                    if (newIndentation > 0) {
-                        var indentationString = getIndentationString(newIndentation, options);
-                        recordReplace(startLinePos_1, nonWhitespaceCharacterAndColumn.character, indentationString);
-                    }
-                    else {
-                        recordDelete(startLinePos_1, nonWhitespaceCharacterAndColumn.character);
-                    }
-                }
-            }
-            function trimTrailingWhitespacesForLines(line1, line2, range) {
-                for (var line = line1; line < line2; line++) {
-                    var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
-                    var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
-                    if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
-                        continue;
-                    }
-                    var whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
-                    if (whitespaceStart !== -1) {
-                        ts.Debug.assert(whitespaceStart === lineStartPosition || !ts.isWhiteSpace(sourceFile.text.charCodeAt(whitespaceStart - 1)));
-                        recordDelete(whitespaceStart, lineEndPosition + 1 - whitespaceStart);
-                    }
-                }
-            }
-            function getTrailingWhitespaceStartPosition(start, end) {
-                var pos = end;
-                while (pos >= start && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
-                    pos--;
-                }
-                if (pos !== end) {
-                    return pos + 1;
-                }
-                return -1;
-            }
-            function trimTrailingWhitespacesForRemainingRange() {
-                var startPosition = previousRange ? previousRange.end : originalRange.pos;
-                var startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
-                var endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
-                trimTrailingWhitespacesForLines(startLine, endLine + 1, previousRange);
-            }
-            function newTextChange(start, len, newText) {
-                return { span: ts.createTextSpan(start, len), newText: newText };
-            }
-            function recordDelete(start, len) {
-                if (len) {
-                    edits.push(newTextChange(start, len, ""));
-                }
-            }
-            function recordReplace(start, len, newText) {
-                if (len || newText) {
-                    edits.push(newTextChange(start, len, newText));
-                }
-            }
-            function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
-                switch (rule.Operation.Action) {
-                    case 1:
-                        return;
-                    case 8:
-                        if (previousRange.end !== currentRange.pos) {
-                            recordDelete(previousRange.end, currentRange.pos - previousRange.end);
-                        }
-                        break;
-                    case 4:
-                        if (rule.Flag !== 1 && previousStartLine !== currentStartLine) {
-                            return;
-                        }
-                        var lineDelta = currentStartLine - previousStartLine;
-                        if (lineDelta !== 1) {
-                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, options.NewLineCharacter);
-                        }
-                        break;
-                    case 2:
-                        if (rule.Flag !== 1 && previousStartLine !== currentStartLine) {
-                            return;
-                        }
-                        var posDelta = currentRange.pos - previousRange.end;
-                        if (posDelta !== 1 || sourceFile.text.charCodeAt(previousRange.end) !== 32) {
-                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, " ");
-                        }
-                        break;
-                }
-            }
-        }
-        function getOpenTokenForList(node, list) {
-            switch (node.kind) {
-                case 148:
-                case 220:
-                case 179:
-                case 147:
-                case 146:
-                case 180:
-                    if (node.typeParameters === list) {
-                        return 25;
-                    }
-                    else if (node.parameters === list) {
-                        return 17;
-                    }
-                    break;
-                case 174:
-                case 175:
-                    if (node.typeArguments === list) {
-                        return 25;
-                    }
-                    else if (node.arguments === list) {
-                        return 17;
-                    }
-                    break;
-                case 155:
-                    if (node.typeArguments === list) {
-                        return 25;
-                    }
-            }
-            return 0;
-        }
-        function getCloseTokenForOpenToken(kind) {
-            switch (kind) {
-                case 17:
-                    return 18;
-                case 25:
-                    return 27;
-            }
-            return 0;
-        }
-        var internedSizes;
-        var internedTabsIndentation;
-        var internedSpacesIndentation;
-        function getIndentationString(indentation, options) {
-            var resetInternedStrings = !internedSizes || (internedSizes.tabSize !== options.TabSize || internedSizes.indentSize !== options.IndentSize);
-            if (resetInternedStrings) {
-                internedSizes = { tabSize: options.TabSize, indentSize: options.IndentSize };
-                internedTabsIndentation = internedSpacesIndentation = undefined;
-            }
-            if (!options.ConvertTabsToSpaces) {
-                var tabs = Math.floor(indentation / options.TabSize);
-                var spaces = indentation - tabs * options.TabSize;
-                var tabString = void 0;
-                if (!internedTabsIndentation) {
-                    internedTabsIndentation = [];
-                }
-                if (internedTabsIndentation[tabs] === undefined) {
-                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
-                }
-                else {
-                    tabString = internedTabsIndentation[tabs];
-                }
-                return spaces ? tabString + repeat(" ", spaces) : tabString;
-            }
-            else {
-                var spacesString = void 0;
-                var quotient = Math.floor(indentation / options.IndentSize);
-                var remainder = indentation % options.IndentSize;
-                if (!internedSpacesIndentation) {
-                    internedSpacesIndentation = [];
-                }
-                if (internedSpacesIndentation[quotient] === undefined) {
-                    spacesString = repeat(" ", options.IndentSize * quotient);
-                    internedSpacesIndentation[quotient] = spacesString;
-                }
-                else {
-                    spacesString = internedSpacesIndentation[quotient];
-                }
-                return remainder ? spacesString + repeat(" ", remainder) : spacesString;
-            }
-            function repeat(value, count) {
-                var s = "";
-                for (var i = 0; i < count; i++) {
-                    s += value;
-                }
-                return s;
-            }
-        }
-        formatting.getIndentationString = getIndentationString;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var SmartIndenter;
-        (function (SmartIndenter) {
-            function getIndentation(position, sourceFile, options) {
-                if (position > sourceFile.text.length) {
-                    return 0;
-                }
-                if (options.IndentStyle === ts.IndentStyle.None) {
-                    return 0;
-                }
-                var precedingToken = ts.findPrecedingToken(position, sourceFile);
-                if (!precedingToken) {
-                    return 0;
-                }
-                var precedingTokenIsLiteral = ts.isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
-                if (precedingTokenIsLiteral && precedingToken.getStart(sourceFile) <= position && precedingToken.end > position) {
-                    return 0;
-                }
-                var lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
-                if (options.IndentStyle === ts.IndentStyle.Block) {
-                    var current_1 = position;
-                    while (current_1 > 0) {
-                        var char = sourceFile.text.charCodeAt(current_1);
-                        if (!ts.isWhiteSpace(char) && !ts.isLineBreak(char)) {
-                            break;
-                        }
-                        current_1--;
-                    }
-                    var lineStart = ts.getLineStartPositionForPosition(current_1, sourceFile);
-                    return SmartIndenter.findFirstNonWhitespaceColumn(lineStart, current_1, sourceFile, options);
-                }
-                if (precedingToken.kind === 24 && precedingToken.parent.kind !== 187) {
-                    var actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
-                    if (actualIndentation !== -1) {
-                        return actualIndentation;
-                    }
-                }
-                var previous;
-                var current = precedingToken;
-                var currentStart;
-                var indentationDelta;
-                while (current) {
-                    if (ts.positionBelongsToNode(current, position, sourceFile) && shouldIndentChildNode(current, previous)) {
-                        currentStart = getStartLineAndCharacterForNode(current, sourceFile);
-                        if (nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile)) {
-                            indentationDelta = 0;
-                        }
-                        else {
-                            indentationDelta = lineAtPosition !== currentStart.line ? options.IndentSize : 0;
-                        }
-                        break;
-                    }
-                    var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
-                    if (actualIndentation !== -1) {
-                        return actualIndentation;
-                    }
-                    actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
-                    if (actualIndentation !== -1) {
-                        return actualIndentation + options.IndentSize;
-                    }
-                    previous = current;
-                    current = current.parent;
-                }
-                if (!current) {
-                    return 0;
-                }
-                return getIndentationForNodeWorker(current, currentStart, undefined, indentationDelta, sourceFile, options);
-            }
-            SmartIndenter.getIndentation = getIndentation;
-            function getIndentationForNode(n, ignoreActualIndentationRange, sourceFile, options) {
-                var start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
-                return getIndentationForNodeWorker(n, start, ignoreActualIndentationRange, 0, sourceFile, options);
-            }
-            SmartIndenter.getIndentationForNode = getIndentationForNode;
-            function getIndentationForNodeWorker(current, currentStart, ignoreActualIndentationRange, indentationDelta, sourceFile, options) {
-                var parent = current.parent;
-                var parentStart;
-                while (parent) {
-                    var useActualIndentation = true;
-                    if (ignoreActualIndentationRange) {
-                        var start = current.getStart(sourceFile);
-                        useActualIndentation = start < ignoreActualIndentationRange.pos || start > ignoreActualIndentationRange.end;
-                    }
-                    if (useActualIndentation) {
-                        var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
-                        if (actualIndentation !== -1) {
-                            return actualIndentation + indentationDelta;
-                        }
-                    }
-                    parentStart = getParentStart(parent, current, sourceFile);
-                    var parentAndChildShareLine = parentStart.line === currentStart.line ||
-                        childStartsOnTheSameLineWithElseInIfStatement(parent, current, currentStart.line, sourceFile);
-                    if (useActualIndentation) {
-                        var actualIndentation = getActualIndentationForNode(current, parent, currentStart, parentAndChildShareLine, sourceFile, options);
-                        if (actualIndentation !== -1) {
-                            return actualIndentation + indentationDelta;
-                        }
-                        actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
-                        if (actualIndentation !== -1) {
-                            return actualIndentation + indentationDelta;
-                        }
-                    }
-                    if (shouldIndentChildNode(parent, current) && !parentAndChildShareLine) {
-                        indentationDelta += options.IndentSize;
-                    }
-                    current = parent;
-                    currentStart = parentStart;
-                    parent = current.parent;
-                }
-                return indentationDelta;
-            }
-            function getParentStart(parent, child, sourceFile) {
-                var containingList = getContainingList(child, sourceFile);
-                if (containingList) {
-                    return sourceFile.getLineAndCharacterOfPosition(containingList.pos);
-                }
-                return sourceFile.getLineAndCharacterOfPosition(parent.getStart(sourceFile));
-            }
-            function getActualIndentationForListItemBeforeComma(commaToken, sourceFile, options) {
-                var commaItemInfo = ts.findListItemInfo(commaToken);
-                if (commaItemInfo && commaItemInfo.listItemIndex > 0) {
-                    return deriveActualIndentationFromList(commaItemInfo.list.getChildren(), commaItemInfo.listItemIndex - 1, sourceFile, options);
-                }
-                else {
-                    return -1;
-                }
-            }
-            function getActualIndentationForNode(current, parent, currentLineAndChar, parentAndChildShareLine, sourceFile, options) {
-                var useActualIndentation = (ts.isDeclaration(current) || ts.isStatement(current)) &&
-                    (parent.kind === 256 || !parentAndChildShareLine);
-                if (!useActualIndentation) {
-                    return -1;
-                }
-                return findColumnForFirstNonWhitespaceCharacterInLine(currentLineAndChar, sourceFile, options);
-            }
-            function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile) {
-                var nextToken = ts.findNextToken(precedingToken, current);
-                if (!nextToken) {
-                    return false;
-                }
-                if (nextToken.kind === 15) {
-                    return true;
-                }
-                else if (nextToken.kind === 16) {
-                    var nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
-                    return lineAtPosition === nextTokenStartLine;
-                }
-                return false;
-            }
-            function getStartLineAndCharacterForNode(n, sourceFile) {
-                return sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
-            }
-            function childStartsOnTheSameLineWithElseInIfStatement(parent, child, childStartLine, sourceFile) {
-                if (parent.kind === 203 && parent.elseStatement === child) {
-                    var elseKeyword = ts.findChildOfKind(parent, 80, sourceFile);
-                    ts.Debug.assert(elseKeyword !== undefined);
-                    var elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
-                    return elseKeywordStartLine === childStartLine;
-                }
-                return false;
-            }
-            SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement = childStartsOnTheSameLineWithElseInIfStatement;
-            function getContainingList(node, sourceFile) {
-                if (node.parent) {
-                    switch (node.parent.kind) {
-                        case 155:
-                            if (node.parent.typeArguments &&
-                                ts.rangeContainsStartEnd(node.parent.typeArguments, node.getStart(sourceFile), node.getEnd())) {
-                                return node.parent.typeArguments;
-                            }
-                            break;
-                        case 171:
-                            return node.parent.properties;
-                        case 170:
-                            return node.parent.elements;
-                        case 220:
-                        case 179:
-                        case 180:
-                        case 147:
-                        case 146:
-                        case 151:
-                        case 152: {
-                            var start = node.getStart(sourceFile);
-                            if (node.parent.typeParameters &&
-                                ts.rangeContainsStartEnd(node.parent.typeParameters, start, node.getEnd())) {
-                                return node.parent.typeParameters;
-                            }
-                            if (ts.rangeContainsStartEnd(node.parent.parameters, start, node.getEnd())) {
-                                return node.parent.parameters;
-                            }
-                            break;
-                        }
-                        case 175:
-                        case 174: {
-                            var start = node.getStart(sourceFile);
-                            if (node.parent.typeArguments &&
-                                ts.rangeContainsStartEnd(node.parent.typeArguments, start, node.getEnd())) {
-                                return node.parent.typeArguments;
-                            }
-                            if (node.parent.arguments &&
-                                ts.rangeContainsStartEnd(node.parent.arguments, start, node.getEnd())) {
-                                return node.parent.arguments;
-                            }
-                            break;
-                        }
-                    }
-                }
-                return undefined;
-            }
-            function getActualIndentationForListItem(node, sourceFile, options) {
-                var containingList = getContainingList(node, sourceFile);
-                return containingList ? getActualIndentationFromList(containingList) : -1;
-                function getActualIndentationFromList(list) {
-                    var index = ts.indexOf(list, node);
-                    return index !== -1 ? deriveActualIndentationFromList(list, index, sourceFile, options) : -1;
-                }
-            }
-            function getLineIndentationWhenExpressionIsInMultiLine(node, sourceFile, options) {
-                if (node.kind === 18) {
-                    return -1;
-                }
-                if (node.parent && (node.parent.kind === 174 ||
-                    node.parent.kind === 175) &&
-                    node.parent.expression !== node) {
-                    var fullCallOrNewExpression = node.parent.expression;
-                    var startingExpression = getStartingExpression(fullCallOrNewExpression);
-                    if (fullCallOrNewExpression === startingExpression) {
-                        return -1;
-                    }
-                    var fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
-                    var startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
-                    if (fullCallOrNewExpressionEnd.line === startingExpressionEnd.line) {
-                        return -1;
-                    }
-                    return findColumnForFirstNonWhitespaceCharacterInLine(fullCallOrNewExpressionEnd, sourceFile, options);
-                }
-                return -1;
-                function getStartingExpression(node) {
-                    while (true) {
-                        switch (node.kind) {
-                            case 174:
-                            case 175:
-                            case 172:
-                            case 173:
-                                node = node.expression;
-                                break;
-                            default:
-                                return node;
-                        }
-                    }
-                }
-            }
-            function deriveActualIndentationFromList(list, index, sourceFile, options) {
-                ts.Debug.assert(index >= 0 && index < list.length);
-                var node = list[index];
-                var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
-                for (var i = index - 1; i >= 0; i--) {
-                    if (list[i].kind === 24) {
-                        continue;
-                    }
-                    var prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
-                    if (prevEndLine !== lineAndCharacter.line) {
-                        return findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options);
-                    }
-                    lineAndCharacter = getStartLineAndCharacterForNode(list[i], sourceFile);
-                }
-                return -1;
-            }
-            function findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options) {
-                var lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
-                return findFirstNonWhitespaceColumn(lineStart, lineStart + lineAndCharacter.character, sourceFile, options);
-            }
-            function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
-                var character = 0;
-                var column = 0;
-                for (var pos = startPos; pos < endPos; pos++) {
-                    var ch = sourceFile.text.charCodeAt(pos);
-                    if (!ts.isWhiteSpace(ch)) {
-                        break;
-                    }
-                    if (ch === 9) {
-                        column += options.TabSize + (column % options.TabSize);
-                    }
-                    else {
-                        column++;
-                    }
-                    character++;
-                }
-                return { column: column, character: character };
-            }
-            SmartIndenter.findFirstNonWhitespaceCharacterAndColumn = findFirstNonWhitespaceCharacterAndColumn;
-            function findFirstNonWhitespaceColumn(startPos, endPos, sourceFile, options) {
-                return findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options).column;
-            }
-            SmartIndenter.findFirstNonWhitespaceColumn = findFirstNonWhitespaceColumn;
-            function nodeContentIsAlwaysIndented(kind) {
-                switch (kind) {
-                    case 202:
-                    case 221:
-                    case 192:
-                    case 222:
-                    case 224:
-                    case 223:
-                    case 170:
-                    case 199:
-                    case 226:
-                    case 171:
-                    case 159:
-                    case 161:
-                    case 227:
-                    case 250:
-                    case 249:
-                    case 178:
-                    case 172:
-                    case 174:
-                    case 175:
-                    case 200:
-                    case 218:
-                    case 235:
-                    case 211:
-                    case 188:
-                    case 168:
-                    case 167:
-                    case 243:
-                    case 242:
-                    case 248:
-                    case 146:
-                    case 151:
-                    case 152:
-                    case 142:
-                    case 156:
-                    case 157:
-                    case 164:
-                    case 176:
-                    case 184:
-                    case 233:
-                        return true;
-                }
-                return false;
-            }
-            function nodeWillIndentChild(parent, child, indentByDefault) {
-                var childKind = child ? child.kind : 0;
-                switch (parent.kind) {
-                    case 204:
-                    case 205:
-                    case 207:
-                    case 208:
-                    case 206:
-                    case 203:
-                    case 220:
-                    case 179:
-                    case 147:
-                    case 180:
-                    case 148:
-                    case 149:
-                    case 150:
-                        return childKind !== 199;
-                    case 241:
-                        return childKind !== 245;
-                }
-                return indentByDefault;
-            }
-            SmartIndenter.nodeWillIndentChild = nodeWillIndentChild;
-            function shouldIndentChildNode(parent, child) {
-                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, false);
-            }
-            SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
-        })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.servicesVersion = "0.5";
-    var ScriptSnapshot;
-    (function (ScriptSnapshot) {
-        var StringScriptSnapshot = (function () {
-            function StringScriptSnapshot(text) {
-                this.text = text;
-            }
-            StringScriptSnapshot.prototype.getText = function (start, end) {
-                return this.text.substring(start, end);
-            };
-            StringScriptSnapshot.prototype.getLength = function () {
-                return this.text.length;
-            };
-            StringScriptSnapshot.prototype.getChangeRange = function (oldSnapshot) {
-                return undefined;
-            };
-            return StringScriptSnapshot;
-        }());
-        function fromString(text) {
-            return new StringScriptSnapshot(text);
-        }
-        ScriptSnapshot.fromString = fromString;
-    })(ScriptSnapshot = ts.ScriptSnapshot || (ts.ScriptSnapshot = {}));
-    var scanner = ts.createScanner(2, true);
-    var emptyArray = [];
-    var jsDocTagNames = [
-        "augments",
-        "author",
-        "argument",
-        "borrows",
-        "class",
-        "constant",
-        "constructor",
-        "constructs",
-        "default",
-        "deprecated",
-        "description",
-        "event",
-        "example",
-        "extends",
-        "field",
-        "fileOverview",
-        "function",
-        "ignore",
-        "inner",
-        "lends",
-        "link",
-        "memberOf",
-        "name",
-        "namespace",
-        "param",
-        "private",
-        "property",
-        "public",
-        "requires",
-        "returns",
-        "see",
-        "since",
-        "static",
-        "throws",
-        "type",
-        "version"
-    ];
-    var jsDocCompletionEntries;
-    function createNode(kind, pos, end, flags, parent) {
-        var node = new NodeObject(kind, pos, end);
-        node.flags = flags;
-        node.parent = parent;
-        return node;
-    }
-    var NodeObject = (function () {
-        function NodeObject(kind, pos, end) {
-            this.kind = kind;
-            this.pos = pos;
-            this.end = end;
-            this.flags = 0;
-            this.parent = undefined;
-        }
-        NodeObject.prototype.getSourceFile = function () {
-            return ts.getSourceFileOfNode(this);
-        };
-        NodeObject.prototype.getStart = function (sourceFile) {
-            return ts.getTokenPosOfNode(this, sourceFile);
-        };
-        NodeObject.prototype.getFullStart = function () {
-            return this.pos;
-        };
-        NodeObject.prototype.getEnd = function () {
-            return this.end;
-        };
-        NodeObject.prototype.getWidth = function (sourceFile) {
-            return this.getEnd() - this.getStart(sourceFile);
-        };
-        NodeObject.prototype.getFullWidth = function () {
-            return this.end - this.pos;
-        };
-        NodeObject.prototype.getLeadingTriviaWidth = function (sourceFile) {
-            return this.getStart(sourceFile) - this.pos;
-        };
-        NodeObject.prototype.getFullText = function (sourceFile) {
-            return (sourceFile || this.getSourceFile()).text.substring(this.pos, this.end);
-        };
-        NodeObject.prototype.getText = function (sourceFile) {
-            return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
-        };
-        NodeObject.prototype.addSyntheticNodes = function (nodes, pos, end) {
-            scanner.setTextPos(pos);
-            while (pos < end) {
-                var token = scanner.scan();
-                var textPos = scanner.getTextPos();
-                nodes.push(createNode(token, pos, textPos, 0, this));
-                pos = textPos;
-            }
-            return pos;
-        };
-        NodeObject.prototype.createSyntaxList = function (nodes) {
-            var list = createNode(279, nodes.pos, nodes.end, 0, this);
-            list._children = [];
-            var pos = nodes.pos;
-            for (var _i = 0, nodes_7 = nodes; _i < nodes_7.length; _i++) {
-                var node = nodes_7[_i];
-                if (pos < node.pos) {
-                    pos = this.addSyntheticNodes(list._children, pos, node.pos);
-                }
-                list._children.push(node);
-                pos = node.end;
-            }
-            if (pos < nodes.end) {
-                this.addSyntheticNodes(list._children, pos, nodes.end);
-            }
-            return list;
-        };
-        NodeObject.prototype.createChildren = function (sourceFile) {
-            var _this = this;
-            var children;
-            if (this.kind >= 139) {
-                scanner.setText((sourceFile || this.getSourceFile()).text);
-                children = [];
-                var pos_3 = this.pos;
-                var processNode = function (node) {
-                    if (pos_3 < node.pos) {
-                        pos_3 = _this.addSyntheticNodes(children, pos_3, node.pos);
-                    }
-                    children.push(node);
-                    pos_3 = node.end;
-                };
-                var processNodes = function (nodes) {
-                    if (pos_3 < nodes.pos) {
-                        pos_3 = _this.addSyntheticNodes(children, pos_3, nodes.pos);
-                    }
-                    children.push(_this.createSyntaxList(nodes));
-                    pos_3 = nodes.end;
-                };
-                ts.forEachChild(this, processNode, processNodes);
-                if (pos_3 < this.end) {
-                    this.addSyntheticNodes(children, pos_3, this.end);
-                }
-                scanner.setText(undefined);
-            }
-            this._children = children || emptyArray;
-        };
-        NodeObject.prototype.getChildCount = function (sourceFile) {
-            if (!this._children)
-                this.createChildren(sourceFile);
-            return this._children.length;
-        };
-        NodeObject.prototype.getChildAt = function (index, sourceFile) {
-            if (!this._children)
-                this.createChildren(sourceFile);
-            return this._children[index];
-        };
-        NodeObject.prototype.getChildren = function (sourceFile) {
-            if (!this._children)
-                this.createChildren(sourceFile);
-            return this._children;
-        };
-        NodeObject.prototype.getFirstToken = function (sourceFile) {
-            var children = this.getChildren(sourceFile);
-            if (!children.length) {
-                return undefined;
-            }
-            var child = children[0];
-            return child.kind < 139 ? child : child.getFirstToken(sourceFile);
-        };
-        NodeObject.prototype.getLastToken = function (sourceFile) {
-            var children = this.getChildren(sourceFile);
-            var child = ts.lastOrUndefined(children);
-            if (!child) {
-                return undefined;
-            }
-            return child.kind < 139 ? child : child.getLastToken(sourceFile);
-        };
-        return NodeObject;
-    }());
-    var SymbolObject = (function () {
-        function SymbolObject(flags, name) {
-            this.flags = flags;
-            this.name = name;
-        }
-        SymbolObject.prototype.getFlags = function () {
-            return this.flags;
-        };
-        SymbolObject.prototype.getName = function () {
-            return this.name;
-        };
-        SymbolObject.prototype.getDeclarations = function () {
-            return this.declarations;
-        };
-        SymbolObject.prototype.getDocumentationComment = function () {
-            if (this.documentationComment === undefined) {
-                this.documentationComment = getJsDocCommentsFromDeclarations(this.declarations, this.name, !(this.flags & 4));
-            }
-            return this.documentationComment;
-        };
-        return SymbolObject;
-    }());
-    function getJsDocCommentsFromDeclarations(declarations, name, canUseParsedParamTagComments) {
-        var documentationComment = [];
-        var docComments = getJsDocCommentsSeparatedByNewLines();
-        ts.forEach(docComments, function (docComment) {
-            if (documentationComment.length) {
-                documentationComment.push(ts.lineBreakPart());
-            }
-            documentationComment.push(docComment);
-        });
-        return documentationComment;
-        function getJsDocCommentsSeparatedByNewLines() {
-            var paramTag = "@param";
-            var jsDocCommentParts = [];
-            ts.forEach(declarations, function (declaration, indexOfDeclaration) {
-                if (ts.indexOf(declarations, declaration) === indexOfDeclaration) {
-                    var sourceFileOfDeclaration_1 = ts.getSourceFileOfNode(declaration);
-                    if (canUseParsedParamTagComments && declaration.kind === 142) {
-                        ts.forEach(getJsDocCommentTextRange(declaration.parent, sourceFileOfDeclaration_1), function (jsDocCommentTextRange) {
-                            var cleanedParamJsDocComment = getCleanedParamJsDocComment(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration_1);
-                            if (cleanedParamJsDocComment) {
-                                ts.addRange(jsDocCommentParts, cleanedParamJsDocComment);
-                            }
-                        });
-                    }
-                    if (declaration.kind === 225 && declaration.body.kind === 225) {
-                        return;
-                    }
-                    while (declaration.kind === 225 && declaration.parent.kind === 225) {
-                        declaration = declaration.parent;
-                    }
-                    ts.forEach(getJsDocCommentTextRange(declaration.kind === 218 ? declaration.parent.parent : declaration, sourceFileOfDeclaration_1), function (jsDocCommentTextRange) {
-                        var cleanedJsDocComment = getCleanedJsDocComment(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration_1);
-                        if (cleanedJsDocComment) {
-                            ts.addRange(jsDocCommentParts, cleanedJsDocComment);
-                        }
-                    });
-                }
-            });
-            return jsDocCommentParts;
-            function getJsDocCommentTextRange(node, sourceFile) {
-                return ts.map(ts.getJsDocComments(node, sourceFile), function (jsDocComment) {
-                    return {
-                        pos: jsDocComment.pos + "/*".length,
-                        end: jsDocComment.end - "*/".length
-                    };
-                });
-            }
-            function consumeWhiteSpacesOnTheLine(pos, end, sourceFile, maxSpacesToRemove) {
-                if (maxSpacesToRemove !== undefined) {
-                    end = Math.min(end, pos + maxSpacesToRemove);
-                }
-                for (; pos < end; pos++) {
-                    var ch = sourceFile.text.charCodeAt(pos);
-                    if (!ts.isWhiteSpace(ch) || ts.isLineBreak(ch)) {
-                        return pos;
-                    }
-                }
-                return end;
-            }
-            function consumeLineBreaks(pos, end, sourceFile) {
-                while (pos < end && ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
-                    pos++;
-                }
-                return pos;
-            }
-            function isName(pos, end, sourceFile, name) {
-                return pos + name.length < end &&
-                    sourceFile.text.substr(pos, name.length) === name &&
-                    (ts.isWhiteSpace(sourceFile.text.charCodeAt(pos + name.length)) ||
-                        ts.isLineBreak(sourceFile.text.charCodeAt(pos + name.length)));
-            }
-            function isParamTag(pos, end, sourceFile) {
-                return isName(pos, end, sourceFile, paramTag);
-            }
-            function pushDocCommentLineText(docComments, text, blankLineCount) {
-                while (blankLineCount) {
-                    blankLineCount--;
-                    docComments.push(ts.textPart(""));
-                }
-                docComments.push(ts.textPart(text));
-            }
-            function getCleanedJsDocComment(pos, end, sourceFile) {
-                var spacesToRemoveAfterAsterisk;
-                var docComments = [];
-                var blankLineCount = 0;
-                var isInParamTag = false;
-                while (pos < end) {
-                    var docCommentTextOfLine = "";
-                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile);
-                    if (pos < end && sourceFile.text.charCodeAt(pos) === 42) {
-                        var lineStartPos = pos + 1;
-                        pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, spacesToRemoveAfterAsterisk);
-                        if (spacesToRemoveAfterAsterisk === undefined && pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
-                            spacesToRemoveAfterAsterisk = pos - lineStartPos;
-                        }
-                    }
-                    else if (spacesToRemoveAfterAsterisk === undefined) {
-                        spacesToRemoveAfterAsterisk = 0;
-                    }
-                    while (pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
-                        var ch = sourceFile.text.charAt(pos);
-                        if (ch === "@") {
-                            if (isParamTag(pos, end, sourceFile)) {
-                                isInParamTag = true;
-                                pos += paramTag.length;
-                                continue;
-                            }
-                            else {
-                                isInParamTag = false;
-                            }
-                        }
-                        if (!isInParamTag) {
-                            docCommentTextOfLine += ch;
-                        }
-                        pos++;
-                    }
-                    pos = consumeLineBreaks(pos, end, sourceFile);
-                    if (docCommentTextOfLine) {
-                        pushDocCommentLineText(docComments, docCommentTextOfLine, blankLineCount);
-                        blankLineCount = 0;
-                    }
-                    else if (!isInParamTag && docComments.length) {
-                        blankLineCount++;
-                    }
-                }
-                return docComments;
-            }
-            function getCleanedParamJsDocComment(pos, end, sourceFile) {
-                var paramHelpStringMargin;
-                var paramDocComments = [];
-                while (pos < end) {
-                    if (isParamTag(pos, end, sourceFile)) {
-                        var blankLineCount = 0;
-                        var recordedParamTag = false;
-                        pos = consumeWhiteSpaces(pos + paramTag.length);
-                        if (pos >= end) {
-                            break;
-                        }
-                        if (sourceFile.text.charCodeAt(pos) === 123) {
-                            pos++;
-                            for (var curlies = 1; pos < end; pos++) {
-                                var charCode = sourceFile.text.charCodeAt(pos);
-                                if (charCode === 123) {
-                                    curlies++;
-                                    continue;
-                                }
-                                if (charCode === 125) {
-                                    curlies--;
-                                    if (curlies === 0) {
-                                        pos++;
-                                        break;
-                                    }
-                                    else {
-                                        continue;
-                                    }
-                                }
-                                if (charCode === 64) {
-                                    break;
-                                }
-                            }
-                            pos = consumeWhiteSpaces(pos);
-                            if (pos >= end) {
-                                break;
-                            }
-                        }
-                        if (isName(pos, end, sourceFile, name)) {
-                            pos = consumeWhiteSpaces(pos + name.length);
-                            if (pos >= end) {
-                                break;
-                            }
-                            var paramHelpString = "";
-                            var firstLineParamHelpStringPos = pos;
-                            while (pos < end) {
-                                var ch = sourceFile.text.charCodeAt(pos);
-                                if (ts.isLineBreak(ch)) {
-                                    if (paramHelpString) {
-                                        pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
-                                        paramHelpString = "";
-                                        blankLineCount = 0;
-                                        recordedParamTag = true;
-                                    }
-                                    else if (recordedParamTag) {
-                                        blankLineCount++;
-                                    }
-                                    setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos);
-                                    continue;
-                                }
-                                if (ch === 64) {
-                                    break;
-                                }
-                                paramHelpString += sourceFile.text.charAt(pos);
-                                pos++;
-                            }
-                            if (paramHelpString) {
-                                pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
-                            }
-                            paramHelpStringMargin = undefined;
-                        }
-                        if (sourceFile.text.charCodeAt(pos) === 64) {
-                            continue;
-                        }
-                    }
-                    pos++;
-                }
-                return paramDocComments;
-                function consumeWhiteSpaces(pos) {
-                    while (pos < end && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
-                        pos++;
-                    }
-                    return pos;
-                }
-                function setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos) {
-                    pos = consumeLineBreaks(pos, end, sourceFile);
-                    if (pos >= end) {
-                        return;
-                    }
-                    if (paramHelpStringMargin === undefined) {
-                        paramHelpStringMargin = sourceFile.getLineAndCharacterOfPosition(firstLineParamHelpStringPos).character;
-                    }
-                    var startOfLinePos = pos;
-                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile, paramHelpStringMargin);
-                    if (pos >= end) {
-                        return;
-                    }
-                    var consumedSpaces = pos - startOfLinePos;
-                    if (consumedSpaces < paramHelpStringMargin) {
-                        var ch = sourceFile.text.charCodeAt(pos);
-                        if (ch === 42) {
-                            pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, paramHelpStringMargin - consumedSpaces - 1);
-                        }
-                    }
-                }
-            }
-        }
-    }
-    var TypeObject = (function () {
-        function TypeObject(checker, flags) {
-            this.checker = checker;
-            this.flags = flags;
-        }
-        TypeObject.prototype.getFlags = function () {
-            return this.flags;
-        };
-        TypeObject.prototype.getSymbol = function () {
-            return this.symbol;
-        };
-        TypeObject.prototype.getProperties = function () {
-            return this.checker.getPropertiesOfType(this);
-        };
-        TypeObject.prototype.getProperty = function (propertyName) {
-            return this.checker.getPropertyOfType(this, propertyName);
-        };
-        TypeObject.prototype.getApparentProperties = function () {
-            return this.checker.getAugmentedPropertiesOfType(this);
-        };
-        TypeObject.prototype.getCallSignatures = function () {
-            return this.checker.getSignaturesOfType(this, 0);
-        };
-        TypeObject.prototype.getConstructSignatures = function () {
-            return this.checker.getSignaturesOfType(this, 1);
-        };
-        TypeObject.prototype.getStringIndexType = function () {
-            return this.checker.getIndexTypeOfType(this, 0);
-        };
-        TypeObject.prototype.getNumberIndexType = function () {
-            return this.checker.getIndexTypeOfType(this, 1);
-        };
-        TypeObject.prototype.getBaseTypes = function () {
-            return this.flags & (1024 | 2048)
-                ? this.checker.getBaseTypes(this)
-                : undefined;
-        };
-        TypeObject.prototype.getNonNullableType = function () {
-            return this.checker.getNonNullableType(this);
-        };
-        return TypeObject;
-    }());
-    var SignatureObject = (function () {
-        function SignatureObject(checker) {
-            this.checker = checker;
-        }
-        SignatureObject.prototype.getDeclaration = function () {
-            return this.declaration;
-        };
-        SignatureObject.prototype.getTypeParameters = function () {
-            return this.typeParameters;
-        };
-        SignatureObject.prototype.getParameters = function () {
-            return this.parameters;
-        };
-        SignatureObject.prototype.getReturnType = function () {
-            return this.checker.getReturnTypeOfSignature(this);
-        };
-        SignatureObject.prototype.getDocumentationComment = function () {
-            if (this.documentationComment === undefined) {
-                this.documentationComment = this.declaration ? getJsDocCommentsFromDeclarations([this.declaration], undefined, false) : [];
-            }
-            return this.documentationComment;
-        };
-        return SignatureObject;
-    }());
-    var SourceFileObject = (function (_super) {
-        __extends(SourceFileObject, _super);
-        function SourceFileObject(kind, pos, end) {
-            _super.call(this, kind, pos, end);
-        }
-        SourceFileObject.prototype.update = function (newText, textChangeRange) {
-            return ts.updateSourceFile(this, newText, textChangeRange);
-        };
-        SourceFileObject.prototype.getLineAndCharacterOfPosition = function (position) {
-            return ts.getLineAndCharacterOfPosition(this, position);
-        };
-        SourceFileObject.prototype.getLineStarts = function () {
-            return ts.getLineStarts(this);
-        };
-        SourceFileObject.prototype.getPositionOfLineAndCharacter = function (line, character) {
-            return ts.getPositionOfLineAndCharacter(this, line, character);
-        };
-        SourceFileObject.prototype.getNamedDeclarations = function () {
-            if (!this.namedDeclarations) {
-                this.namedDeclarations = this.computeNamedDeclarations();
-            }
-            return this.namedDeclarations;
-        };
-        SourceFileObject.prototype.computeNamedDeclarations = function () {
-            var result = {};
-            ts.forEachChild(this, visit);
-            return result;
-            function addDeclaration(declaration) {
-                var name = getDeclarationName(declaration);
-                if (name) {
-                    var declarations = getDeclarations(name);
-                    declarations.push(declaration);
-                }
-            }
-            function getDeclarations(name) {
-                return ts.getProperty(result, name) || (result[name] = []);
-            }
-            function getDeclarationName(declaration) {
-                if (declaration.name) {
-                    var result_2 = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (result_2 !== undefined) {
-                        return result_2;
-                    }
-                    if (declaration.name.kind === 140) {
-                        var expr = declaration.name.expression;
-                        if (expr.kind === 172) {
-                            return expr.name.text;
-                        }
-                        return getTextOfIdentifierOrLiteral(expr);
-                    }
-                }
-                return undefined;
-            }
-            function getTextOfIdentifierOrLiteral(node) {
-                if (node) {
-                    if (node.kind === 69 ||
-                        node.kind === 9 ||
-                        node.kind === 8) {
-                        return node.text;
-                    }
-                }
-                return undefined;
-            }
-            function visit(node) {
-                switch (node.kind) {
-                    case 220:
-                    case 179:
-                    case 147:
-                    case 146:
-                        var functionDeclaration = node;
-                        var declarationName = getDeclarationName(functionDeclaration);
-                        if (declarationName) {
-                            var declarations = getDeclarations(declarationName);
-                            var lastDeclaration = ts.lastOrUndefined(declarations);
-                            if (lastDeclaration && functionDeclaration.parent === lastDeclaration.parent && functionDeclaration.symbol === lastDeclaration.symbol) {
-                                if (functionDeclaration.body && !lastDeclaration.body) {
-                                    declarations[declarations.length - 1] = functionDeclaration;
-                                }
-                            }
-                            else {
-                                declarations.push(functionDeclaration);
-                            }
-                            ts.forEachChild(node, visit);
-                        }
-                        break;
-                    case 221:
-                    case 192:
-                    case 222:
-                    case 223:
-                    case 224:
-                    case 225:
-                    case 229:
-                    case 238:
-                    case 234:
-                    case 229:
-                    case 231:
-                    case 232:
-                    case 149:
-                    case 150:
-                    case 159:
-                        addDeclaration(node);
-                        ts.forEachChild(node, visit);
-                        break;
-                    case 142:
-                        if (!(node.flags & 92)) {
-                            break;
-                        }
-                    case 218:
-                    case 169: {
-                        var decl = node;
-                        if (ts.isBindingPattern(decl.name)) {
-                            ts.forEachChild(decl.name, visit);
-                            break;
-                        }
-                        if (decl.initializer)
-                            visit(decl.initializer);
-                    }
-                    case 255:
-                    case 145:
-                    case 144:
-                        addDeclaration(node);
-                        break;
-                    case 236:
-                        if (node.exportClause) {
-                            ts.forEach(node.exportClause.elements, visit);
-                        }
-                        break;
-                    case 230:
-                        var importClause = node.importClause;
-                        if (importClause) {
-                            if (importClause.name) {
-                                addDeclaration(importClause);
-                            }
-                            if (importClause.namedBindings) {
-                                if (importClause.namedBindings.kind === 232) {
-                                    addDeclaration(importClause.namedBindings);
-                                }
-                                else {
-                                    ts.forEach(importClause.namedBindings.elements, visit);
-                                }
-                            }
-                        }
-                        break;
-                    default:
-                        ts.forEachChild(node, visit);
-                }
-            }
-        };
-        return SourceFileObject;
-    }(NodeObject));
-    var TextChange = (function () {
-        function TextChange() {
-        }
-        return TextChange;
-    }());
-    ts.TextChange = TextChange;
-    var HighlightSpanKind;
-    (function (HighlightSpanKind) {
-        HighlightSpanKind.none = "none";
-        HighlightSpanKind.definition = "definition";
-        HighlightSpanKind.reference = "reference";
-        HighlightSpanKind.writtenReference = "writtenReference";
-    })(HighlightSpanKind = ts.HighlightSpanKind || (ts.HighlightSpanKind = {}));
-    (function (IndentStyle) {
-        IndentStyle[IndentStyle["None"] = 0] = "None";
-        IndentStyle[IndentStyle["Block"] = 1] = "Block";
-        IndentStyle[IndentStyle["Smart"] = 2] = "Smart";
-    })(ts.IndentStyle || (ts.IndentStyle = {}));
-    var IndentStyle = ts.IndentStyle;
-    (function (SymbolDisplayPartKind) {
-        SymbolDisplayPartKind[SymbolDisplayPartKind["aliasName"] = 0] = "aliasName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["className"] = 1] = "className";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["enumName"] = 2] = "enumName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["fieldName"] = 3] = "fieldName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["interfaceName"] = 4] = "interfaceName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["keyword"] = 5] = "keyword";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["lineBreak"] = 6] = "lineBreak";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["numericLiteral"] = 7] = "numericLiteral";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["stringLiteral"] = 8] = "stringLiteral";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["localName"] = 9] = "localName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["methodName"] = 10] = "methodName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["moduleName"] = 11] = "moduleName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["operator"] = 12] = "operator";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["parameterName"] = 13] = "parameterName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["propertyName"] = 14] = "propertyName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["punctuation"] = 15] = "punctuation";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["space"] = 16] = "space";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["text"] = 17] = "text";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["typeParameterName"] = 18] = "typeParameterName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["enumMemberName"] = 19] = "enumMemberName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["functionName"] = 20] = "functionName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["regularExpressionLiteral"] = 21] = "regularExpressionLiteral";
-    })(ts.SymbolDisplayPartKind || (ts.SymbolDisplayPartKind = {}));
-    var SymbolDisplayPartKind = ts.SymbolDisplayPartKind;
-    (function (TokenClass) {
-        TokenClass[TokenClass["Punctuation"] = 0] = "Punctuation";
-        TokenClass[TokenClass["Keyword"] = 1] = "Keyword";
-        TokenClass[TokenClass["Operator"] = 2] = "Operator";
-        TokenClass[TokenClass["Comment"] = 3] = "Comment";
-        TokenClass[TokenClass["Whitespace"] = 4] = "Whitespace";
-        TokenClass[TokenClass["Identifier"] = 5] = "Identifier";
-        TokenClass[TokenClass["NumberLiteral"] = 6] = "NumberLiteral";
-        TokenClass[TokenClass["StringLiteral"] = 7] = "StringLiteral";
-        TokenClass[TokenClass["RegExpLiteral"] = 8] = "RegExpLiteral";
-    })(ts.TokenClass || (ts.TokenClass = {}));
-    var TokenClass = ts.TokenClass;
-    var ScriptElementKind;
-    (function (ScriptElementKind) {
-        ScriptElementKind.unknown = "";
-        ScriptElementKind.warning = "warning";
-        ScriptElementKind.keyword = "keyword";
-        ScriptElementKind.scriptElement = "script";
-        ScriptElementKind.moduleElement = "module";
-        ScriptElementKind.classElement = "class";
-        ScriptElementKind.localClassElement = "local class";
-        ScriptElementKind.interfaceElement = "interface";
-        ScriptElementKind.typeElement = "type";
-        ScriptElementKind.enumElement = "enum";
-        ScriptElementKind.variableElement = "var";
-        ScriptElementKind.localVariableElement = "local var";
-        ScriptElementKind.functionElement = "function";
-        ScriptElementKind.localFunctionElement = "local function";
-        ScriptElementKind.memberFunctionElement = "method";
-        ScriptElementKind.memberGetAccessorElement = "getter";
-        ScriptElementKind.memberSetAccessorElement = "setter";
-        ScriptElementKind.memberVariableElement = "property";
-        ScriptElementKind.constructorImplementationElement = "constructor";
-        ScriptElementKind.callSignatureElement = "call";
-        ScriptElementKind.indexSignatureElement = "index";
-        ScriptElementKind.constructSignatureElement = "construct";
-        ScriptElementKind.parameterElement = "parameter";
-        ScriptElementKind.typeParameterElement = "type parameter";
-        ScriptElementKind.primitiveType = "primitive type";
-        ScriptElementKind.label = "label";
-        ScriptElementKind.alias = "alias";
-        ScriptElementKind.constElement = "const";
-        ScriptElementKind.letElement = "let";
-    })(ScriptElementKind = ts.ScriptElementKind || (ts.ScriptElementKind = {}));
-    var ScriptElementKindModifier;
-    (function (ScriptElementKindModifier) {
-        ScriptElementKindModifier.none = "";
-        ScriptElementKindModifier.publicMemberModifier = "public";
-        ScriptElementKindModifier.privateMemberModifier = "private";
-        ScriptElementKindModifier.protectedMemberModifier = "protected";
-        ScriptElementKindModifier.exportedModifier = "export";
-        ScriptElementKindModifier.ambientModifier = "declare";
-        ScriptElementKindModifier.staticModifier = "static";
-        ScriptElementKindModifier.abstractModifier = "abstract";
-    })(ScriptElementKindModifier = ts.ScriptElementKindModifier || (ts.ScriptElementKindModifier = {}));
-    var ClassificationTypeNames = (function () {
-        function ClassificationTypeNames() {
-        }
-        ClassificationTypeNames.comment = "comment";
-        ClassificationTypeNames.identifier = "identifier";
-        ClassificationTypeNames.keyword = "keyword";
-        ClassificationTypeNames.numericLiteral = "number";
-        ClassificationTypeNames.operator = "operator";
-        ClassificationTypeNames.stringLiteral = "string";
-        ClassificationTypeNames.whiteSpace = "whitespace";
-        ClassificationTypeNames.text = "text";
-        ClassificationTypeNames.punctuation = "punctuation";
-        ClassificationTypeNames.className = "class name";
-        ClassificationTypeNames.enumName = "enum name";
-        ClassificationTypeNames.interfaceName = "interface name";
-        ClassificationTypeNames.moduleName = "module name";
-        ClassificationTypeNames.typeParameterName = "type parameter name";
-        ClassificationTypeNames.typeAliasName = "type alias name";
-        ClassificationTypeNames.parameterName = "parameter name";
-        ClassificationTypeNames.docCommentTagName = "doc comment tag name";
-        ClassificationTypeNames.jsxOpenTagName = "jsx open tag name";
-        ClassificationTypeNames.jsxCloseTagName = "jsx close tag name";
-        ClassificationTypeNames.jsxSelfClosingTagName = "jsx self closing tag name";
-        ClassificationTypeNames.jsxAttribute = "jsx attribute";
-        ClassificationTypeNames.jsxText = "jsx text";
-        ClassificationTypeNames.jsxAttributeStringLiteralValue = "jsx attribute string literal value";
-        return ClassificationTypeNames;
-    }());
-    ts.ClassificationTypeNames = ClassificationTypeNames;
-    function displayPartsToString(displayParts) {
-        if (displayParts) {
-            return ts.map(displayParts, function (displayPart) { return displayPart.text; }).join("");
-        }
-        return "";
-    }
-    ts.displayPartsToString = displayPartsToString;
-    function isLocalVariableOrFunction(symbol) {
-        if (symbol.parent) {
-            return false;
-        }
-        return ts.forEach(symbol.declarations, function (declaration) {
-            if (declaration.kind === 179) {
-                return true;
-            }
-            if (declaration.kind !== 218 && declaration.kind !== 220) {
-                return false;
-            }
-            for (var parent_15 = declaration.parent; !ts.isFunctionBlock(parent_15); parent_15 = parent_15.parent) {
-                if (parent_15.kind === 256 || parent_15.kind === 226) {
-                    return false;
-                }
-            }
-            return true;
-        });
-    }
-    function getDefaultCompilerOptions() {
-        return {
-            target: 1,
-            jsx: 1
-        };
-    }
-    ts.getDefaultCompilerOptions = getDefaultCompilerOptions;
-    var HostCache = (function () {
-        function HostCache(host, getCanonicalFileName) {
-            this.host = host;
-            this.getCanonicalFileName = getCanonicalFileName;
-            this.currentDirectory = host.getCurrentDirectory();
-            this.fileNameToEntry = ts.createFileMap();
-            var rootFileNames = host.getScriptFileNames();
-            for (var _i = 0, rootFileNames_1 = rootFileNames; _i < rootFileNames_1.length; _i++) {
-                var fileName = rootFileNames_1[_i];
-                this.createEntry(fileName, ts.toPath(fileName, this.currentDirectory, getCanonicalFileName));
-            }
-            this._compilationSettings = host.getCompilationSettings() || getDefaultCompilerOptions();
-        }
-        HostCache.prototype.compilationSettings = function () {
-            return this._compilationSettings;
-        };
-        HostCache.prototype.createEntry = function (fileName, path) {
-            var entry;
-            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
-            if (scriptSnapshot) {
-                entry = {
-                    hostFileName: fileName,
-                    version: this.host.getScriptVersion(fileName),
-                    scriptSnapshot: scriptSnapshot,
-                    scriptKind: ts.getScriptKind(fileName, this.host)
-                };
-            }
-            this.fileNameToEntry.set(path, entry);
-            return entry;
-        };
-        HostCache.prototype.getEntry = function (path) {
-            return this.fileNameToEntry.get(path);
-        };
-        HostCache.prototype.contains = function (path) {
-            return this.fileNameToEntry.contains(path);
-        };
-        HostCache.prototype.getOrCreateEntry = function (fileName) {
-            var path = ts.toPath(fileName, this.currentDirectory, this.getCanonicalFileName);
-            return this.getOrCreateEntryByPath(fileName, path);
-        };
-        HostCache.prototype.getOrCreateEntryByPath = function (fileName, path) {
-            return this.contains(path)
-                ? this.getEntry(path)
-                : this.createEntry(fileName, path);
-        };
-        HostCache.prototype.getRootFileNames = function () {
-            var fileNames = [];
-            this.fileNameToEntry.forEachValue(function (path, value) {
-                if (value) {
-                    fileNames.push(value.hostFileName);
-                }
-            });
-            return fileNames;
-        };
-        HostCache.prototype.getVersion = function (path) {
-            var file = this.getEntry(path);
-            return file && file.version;
-        };
-        HostCache.prototype.getScriptSnapshot = function (path) {
-            var file = this.getEntry(path);
-            return file && file.scriptSnapshot;
-        };
-        return HostCache;
-    }());
-    var SyntaxTreeCache = (function () {
-        function SyntaxTreeCache(host) {
-            this.host = host;
-        }
-        SyntaxTreeCache.prototype.getCurrentSourceFile = function (fileName) {
-            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
-            if (!scriptSnapshot) {
-                throw new Error("Could not find file: '" + fileName + "'.");
-            }
-            var scriptKind = ts.getScriptKind(fileName, this.host);
-            var version = this.host.getScriptVersion(fileName);
-            var sourceFile;
-            if (this.currentFileName !== fileName) {
-                sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, 2, version, true, scriptKind);
-            }
-            else if (this.currentFileVersion !== version) {
-                var editRange = scriptSnapshot.getChangeRange(this.currentFileScriptSnapshot);
-                sourceFile = updateLanguageServiceSourceFile(this.currentSourceFile, scriptSnapshot, version, editRange);
-            }
-            if (sourceFile) {
-                this.currentFileVersion = version;
-                this.currentFileName = fileName;
-                this.currentFileScriptSnapshot = scriptSnapshot;
-                this.currentSourceFile = sourceFile;
-            }
-            return this.currentSourceFile;
-        };
-        return SyntaxTreeCache;
-    }());
-    function setSourceFileFields(sourceFile, scriptSnapshot, version) {
-        sourceFile.version = version;
-        sourceFile.scriptSnapshot = scriptSnapshot;
-    }
-    function transpileModule(input, transpileOptions) {
-        var options = transpileOptions.compilerOptions ? ts.clone(transpileOptions.compilerOptions) : getDefaultCompilerOptions();
-        options.isolatedModules = true;
-        options.suppressOutputPathCheck = true;
-        options.allowNonTsExtensions = true;
-        options.noLib = true;
-        options.noResolve = true;
-        var inputFileName = transpileOptions.fileName || (options.jsx ? "module.tsx" : "module.ts");
-        var sourceFile = ts.createSourceFile(inputFileName, input, options.target);
-        if (transpileOptions.moduleName) {
-            sourceFile.moduleName = transpileOptions.moduleName;
-        }
-        sourceFile.renamedDependencies = transpileOptions.renamedDependencies;
-        var newLine = ts.getNewLineCharacter(options);
-        var outputText;
-        var sourceMapText;
-        var compilerHost = {
-            getSourceFile: function (fileName, target) { return fileName === ts.normalizePath(inputFileName) ? sourceFile : undefined; },
-            writeFile: function (name, text, writeByteOrderMark) {
-                if (ts.fileExtensionIs(name, ".map")) {
-                    ts.Debug.assert(sourceMapText === undefined, "Unexpected multiple source map outputs for the file '" + name + "'");
-                    sourceMapText = text;
-                }
-                else {
-                    ts.Debug.assert(outputText === undefined, "Unexpected multiple outputs for the file: '" + name + "'");
-                    outputText = text;
-                }
-            },
-            getDefaultLibFileName: function () { return "lib.d.ts"; },
-            useCaseSensitiveFileNames: function () { return false; },
-            getCanonicalFileName: function (fileName) { return fileName; },
-            getCurrentDirectory: function () { return ""; },
-            getNewLine: function () { return newLine; },
-            fileExists: function (fileName) { return fileName === inputFileName; },
-            readFile: function (fileName) { return ""; },
-            directoryExists: function (directoryExists) { return true; }
-        };
-        var program = ts.createProgram([inputFileName], options, compilerHost);
-        var diagnostics;
-        if (transpileOptions.reportDiagnostics) {
-            diagnostics = [];
-            ts.addRange(diagnostics, program.getSyntacticDiagnostics(sourceFile));
-            ts.addRange(diagnostics, program.getOptionsDiagnostics());
-        }
-        program.emit();
-        ts.Debug.assert(outputText !== undefined, "Output generation failed");
-        return { outputText: outputText, diagnostics: diagnostics, sourceMapText: sourceMapText };
-    }
-    ts.transpileModule = transpileModule;
-    function transpile(input, compilerOptions, fileName, diagnostics, moduleName) {
-        var output = transpileModule(input, { compilerOptions: compilerOptions, fileName: fileName, reportDiagnostics: !!diagnostics, moduleName: moduleName });
-        ts.addRange(diagnostics, output.diagnostics);
-        return output.outputText;
-    }
-    ts.transpile = transpile;
-    function createLanguageServiceSourceFile(fileName, scriptSnapshot, scriptTarget, version, setNodeParents, scriptKind) {
-        var text = scriptSnapshot.getText(0, scriptSnapshot.getLength());
-        var sourceFile = ts.createSourceFile(fileName, text, scriptTarget, setNodeParents, scriptKind);
-        setSourceFileFields(sourceFile, scriptSnapshot, version);
-        return sourceFile;
-    }
-    ts.createLanguageServiceSourceFile = createLanguageServiceSourceFile;
-    ts.disableIncrementalParsing = false;
-    function updateLanguageServiceSourceFile(sourceFile, scriptSnapshot, version, textChangeRange, aggressiveChecks) {
-        if (textChangeRange) {
-            if (version !== sourceFile.version) {
-                if (!ts.disableIncrementalParsing) {
-                    var newText = void 0;
-                    var prefix = textChangeRange.span.start !== 0
-                        ? sourceFile.text.substr(0, textChangeRange.span.start)
-                        : "";
-                    var suffix = ts.textSpanEnd(textChangeRange.span) !== sourceFile.text.length
-                        ? sourceFile.text.substr(ts.textSpanEnd(textChangeRange.span))
-                        : "";
-                    if (textChangeRange.newLength === 0) {
-                        newText = prefix && suffix ? prefix + suffix : prefix || suffix;
-                    }
-                    else {
-                        var changedText = scriptSnapshot.getText(textChangeRange.span.start, textChangeRange.span.start + textChangeRange.newLength);
-                        newText = prefix && suffix
-                            ? prefix + changedText + suffix
-                            : prefix
-                                ? (prefix + changedText)
-                                : (changedText + suffix);
-                    }
-                    var newSourceFile = ts.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
-                    setSourceFileFields(newSourceFile, scriptSnapshot, version);
-                    newSourceFile.nameTable = undefined;
-                    if (sourceFile !== newSourceFile && sourceFile.scriptSnapshot) {
-                        if (sourceFile.scriptSnapshot.dispose) {
-                            sourceFile.scriptSnapshot.dispose();
-                        }
-                        sourceFile.scriptSnapshot = undefined;
-                    }
-                    return newSourceFile;
-                }
-            }
-        }
-        return createLanguageServiceSourceFile(sourceFile.fileName, scriptSnapshot, sourceFile.languageVersion, version, true, sourceFile.scriptKind);
-    }
-    ts.updateLanguageServiceSourceFile = updateLanguageServiceSourceFile;
-    function createDocumentRegistry(useCaseSensitiveFileNames, currentDirectory) {
-        if (currentDirectory === void 0) { currentDirectory = ""; }
-        var buckets = {};
-        var getCanonicalFileName = ts.createGetCanonicalFileName(!!useCaseSensitiveFileNames);
-        function getKeyForCompilationSettings(settings) {
-            return ("_" + settings.target + "|" + settings.module + "|" + settings.noResolve + "|" + settings.jsx + "|" + settings.allowJs + "|" + settings.baseUrl + "|" + settings.typesRoot + "|" + settings.typesSearchPaths + "|" + JSON.stringify(settings.rootDirs) + "|" + JSON.stringify(settings.paths));
-        }
-        function getBucketForCompilationSettings(key, createIfMissing) {
-            var bucket = ts.lookUp(buckets, key);
-            if (!bucket && createIfMissing) {
-                buckets[key] = bucket = ts.createFileMap();
-            }
-            return bucket;
-        }
-        function reportStats() {
-            var bucketInfoArray = Object.keys(buckets).filter(function (name) { return name && name.charAt(0) === "_"; }).map(function (name) {
-                var entries = ts.lookUp(buckets, name);
-                var sourceFiles = [];
-                entries.forEachValue(function (key, entry) {
-                    sourceFiles.push({
-                        name: key,
-                        refCount: entry.languageServiceRefCount,
-                        references: entry.owners.slice(0)
-                    });
-                });
-                sourceFiles.sort(function (x, y) { return y.refCount - x.refCount; });
-                return {
-                    bucket: name,
-                    sourceFiles: sourceFiles
-                };
-            });
-            return JSON.stringify(bucketInfoArray, undefined, 2);
-        }
-        function acquireDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
-        }
-        function acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
-            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, true, scriptKind);
-        }
-        function updateDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
-        }
-        function updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
-            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, false, scriptKind);
-        }
-        function acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, acquiring, scriptKind) {
-            var bucket = getBucketForCompilationSettings(key, true);
-            var entry = bucket.get(path);
-            if (!entry) {
-                ts.Debug.assert(acquiring, "How could we be trying to update a document that the registry doesn't have?");
-                var sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, compilationSettings.target, version, false, scriptKind);
-                entry = {
-                    sourceFile: sourceFile,
-                    languageServiceRefCount: 0,
-                    owners: []
-                };
-                bucket.set(path, entry);
-            }
-            else {
-                if (entry.sourceFile.version !== version) {
-                    entry.sourceFile = updateLanguageServiceSourceFile(entry.sourceFile, scriptSnapshot, version, scriptSnapshot.getChangeRange(entry.sourceFile.scriptSnapshot));
-                }
-            }
-            if (acquiring) {
-                entry.languageServiceRefCount++;
-            }
-            return entry.sourceFile;
-        }
-        function releaseDocument(fileName, compilationSettings) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return releaseDocumentWithKey(path, key);
-        }
-        function releaseDocumentWithKey(path, key) {
-            var bucket = getBucketForCompilationSettings(key, false);
-            ts.Debug.assert(bucket !== undefined);
-            var entry = bucket.get(path);
-            entry.languageServiceRefCount--;
-            ts.Debug.assert(entry.languageServiceRefCount >= 0);
-            if (entry.languageServiceRefCount === 0) {
-                bucket.remove(path);
-            }
-        }
-        return {
-            acquireDocument: acquireDocument,
-            acquireDocumentWithKey: acquireDocumentWithKey,
-            updateDocument: updateDocument,
-            updateDocumentWithKey: updateDocumentWithKey,
-            releaseDocument: releaseDocument,
-            releaseDocumentWithKey: releaseDocumentWithKey,
-            reportStats: reportStats,
-            getKeyForCompilationSettings: getKeyForCompilationSettings
-        };
-    }
-    ts.createDocumentRegistry = createDocumentRegistry;
-    function preProcessFile(sourceText, readImportFiles, detectJavaScriptImports) {
-        if (readImportFiles === void 0) { readImportFiles = true; }
-        if (detectJavaScriptImports === void 0) { detectJavaScriptImports = false; }
-        var referencedFiles = [];
-        var typeReferenceDirectives = [];
-        var importedFiles = [];
-        var ambientExternalModules;
-        var isNoDefaultLib = false;
-        var braceNesting = 0;
-        var externalModule = false;
-        function nextToken() {
-            var token = scanner.scan();
-            if (token === 15) {
-                braceNesting++;
-            }
-            else if (token === 16) {
-                braceNesting--;
-            }
-            return token;
-        }
-        function processTripleSlashDirectives() {
-            var commentRanges = ts.getLeadingCommentRanges(sourceText, 0);
-            ts.forEach(commentRanges, function (commentRange) {
-                var comment = sourceText.substring(commentRange.pos, commentRange.end);
-                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, commentRange);
-                if (referencePathMatchResult) {
-                    isNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
-                    var fileReference = referencePathMatchResult.fileReference;
-                    if (fileReference) {
-                        var collection = referencePathMatchResult.isTypeReferenceDirective
-                            ? typeReferenceDirectives
-                            : referencedFiles;
-                        collection.push(fileReference);
-                    }
-                }
-            });
-        }
-        function getFileReference() {
-            var file = scanner.getTokenValue();
-            var pos = scanner.getTokenPos();
-            return {
-                fileName: file,
-                pos: pos,
-                end: pos + file.length
-            };
-        }
-        function recordAmbientExternalModule() {
-            if (!ambientExternalModules) {
-                ambientExternalModules = [];
-            }
-            ambientExternalModules.push({ ref: getFileReference(), depth: braceNesting });
-        }
-        function recordModuleName() {
-            importedFiles.push(getFileReference());
-            markAsExternalModuleIfTopLevel();
-        }
-        function markAsExternalModuleIfTopLevel() {
-            if (braceNesting === 0) {
-                externalModule = true;
-            }
-        }
-        function tryConsumeDeclare() {
-            var token = scanner.getToken();
-            if (token === 122) {
-                token = nextToken();
-                if (token === 125) {
-                    token = nextToken();
-                    if (token === 9) {
-                        recordAmbientExternalModule();
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeImport() {
-            var token = scanner.getToken();
-            if (token === 89) {
-                token = nextToken();
-                if (token === 9) {
-                    recordModuleName();
-                    return true;
-                }
-                else {
-                    if (token === 69 || ts.isKeyword(token)) {
-                        token = nextToken();
-                        if (token === 136) {
-                            token = nextToken();
-                            if (token === 9) {
-                                recordModuleName();
-                                return true;
-                            }
-                        }
-                        else if (token === 56) {
-                            if (tryConsumeRequireCall(true)) {
-                                return true;
-                            }
-                        }
-                        else if (token === 24) {
-                            token = nextToken();
-                        }
-                        else {
-                            return true;
-                        }
-                    }
-                    if (token === 15) {
-                        token = nextToken();
-                        while (token !== 16 && token !== 1) {
-                            token = nextToken();
-                        }
-                        if (token === 16) {
-                            token = nextToken();
-                            if (token === 136) {
-                                token = nextToken();
-                                if (token === 9) {
-                                    recordModuleName();
-                                }
-                            }
-                        }
-                    }
-                    else if (token === 37) {
-                        token = nextToken();
-                        if (token === 116) {
-                            token = nextToken();
-                            if (token === 69 || ts.isKeyword(token)) {
-                                token = nextToken();
-                                if (token === 136) {
-                                    token = nextToken();
-                                    if (token === 9) {
-                                        recordModuleName();
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeExport() {
-            var token = scanner.getToken();
-            if (token === 82) {
-                markAsExternalModuleIfTopLevel();
-                token = nextToken();
-                if (token === 15) {
-                    token = nextToken();
-                    while (token !== 16 && token !== 1) {
-                        token = nextToken();
-                    }
-                    if (token === 16) {
-                        token = nextToken();
-                        if (token === 136) {
-                            token = nextToken();
-                            if (token === 9) {
-                                recordModuleName();
-                            }
-                        }
-                    }
-                }
-                else if (token === 37) {
-                    token = nextToken();
-                    if (token === 136) {
-                        token = nextToken();
-                        if (token === 9) {
-                            recordModuleName();
-                        }
-                    }
-                }
-                else if (token === 89) {
-                    token = nextToken();
-                    if (token === 69 || ts.isKeyword(token)) {
-                        token = nextToken();
-                        if (token === 56) {
-                            if (tryConsumeRequireCall(true)) {
-                                return true;
-                            }
-                        }
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeRequireCall(skipCurrentToken) {
-            var token = skipCurrentToken ? nextToken() : scanner.getToken();
-            if (token === 129) {
-                token = nextToken();
-                if (token === 17) {
-                    token = nextToken();
-                    if (token === 9) {
-                        recordModuleName();
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeDefine() {
-            var token = scanner.getToken();
-            if (token === 69 && scanner.getTokenValue() === "define") {
-                token = nextToken();
-                if (token !== 17) {
-                    return true;
-                }
-                token = nextToken();
-                if (token === 9) {
-                    token = nextToken();
-                    if (token === 24) {
-                        token = nextToken();
-                    }
-                    else {
-                        return true;
-                    }
-                }
-                if (token !== 19) {
-                    return true;
-                }
-                token = nextToken();
-                var i = 0;
-                while (token !== 20 && token !== 1) {
-                    if (token === 9) {
-                        recordModuleName();
-                        i++;
-                    }
-                    token = nextToken();
-                }
-                return true;
-            }
-            return false;
-        }
-        function processImports() {
-            scanner.setText(sourceText);
-            nextToken();
-            while (true) {
-                if (scanner.getToken() === 1) {
-                    break;
-                }
-                if (tryConsumeDeclare() ||
-                    tryConsumeImport() ||
-                    tryConsumeExport() ||
-                    (detectJavaScriptImports && (tryConsumeRequireCall(false) || tryConsumeDefine()))) {
-                    continue;
-                }
-                else {
-                    nextToken();
-                }
-            }
-            scanner.setText(undefined);
-        }
-        if (readImportFiles) {
-            processImports();
-        }
-        processTripleSlashDirectives();
-        if (externalModule) {
-            if (ambientExternalModules) {
-                for (var _i = 0, ambientExternalModules_1 = ambientExternalModules; _i < ambientExternalModules_1.length; _i++) {
-                    var decl = ambientExternalModules_1[_i];
-                    importedFiles.push(decl.ref);
-                }
-            }
-            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: undefined };
-        }
-        else {
-            var ambientModuleNames = void 0;
-            if (ambientExternalModules) {
-                for (var _a = 0, ambientExternalModules_2 = ambientExternalModules; _a < ambientExternalModules_2.length; _a++) {
-                    var decl = ambientExternalModules_2[_a];
-                    if (decl.depth === 0) {
-                        if (!ambientModuleNames) {
-                            ambientModuleNames = [];
-                        }
-                        ambientModuleNames.push(decl.ref.fileName);
-                    }
-                    else {
-                        importedFiles.push(decl.ref);
-                    }
-                }
-            }
-            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: ambientModuleNames };
-        }
-    }
-    ts.preProcessFile = preProcessFile;
-    function getTargetLabel(referenceNode, labelName) {
-        while (referenceNode) {
-            if (referenceNode.kind === 214 && referenceNode.label.text === labelName) {
-                return referenceNode.label;
-            }
-            referenceNode = referenceNode.parent;
-        }
-        return undefined;
-    }
-    function isJumpStatementTarget(node) {
-        return node.kind === 69 &&
-            (node.parent.kind === 210 || node.parent.kind === 209) &&
-            node.parent.label === node;
-    }
-    function isLabelOfLabeledStatement(node) {
-        return node.kind === 69 &&
-            node.parent.kind === 214 &&
-            node.parent.label === node;
-    }
-    function isLabeledBy(node, labelName) {
-        for (var owner = node.parent; owner.kind === 214; owner = owner.parent) {
-            if (owner.label.text === labelName) {
-                return true;
-            }
-        }
-        return false;
-    }
-    function isLabelName(node) {
-        return isLabelOfLabeledStatement(node) || isJumpStatementTarget(node);
-    }
-    function isRightSideOfQualifiedName(node) {
-        return node.parent.kind === 139 && node.parent.right === node;
-    }
-    function isRightSideOfPropertyAccess(node) {
-        return node && node.parent && node.parent.kind === 172 && node.parent.name === node;
-    }
-    function isCallExpressionTarget(node) {
-        if (isRightSideOfPropertyAccess(node)) {
-            node = node.parent;
-        }
-        return node && node.parent && node.parent.kind === 174 && node.parent.expression === node;
-    }
-    function isNewExpressionTarget(node) {
-        if (isRightSideOfPropertyAccess(node)) {
-            node = node.parent;
-        }
-        return node && node.parent && node.parent.kind === 175 && node.parent.expression === node;
-    }
-    function isNameOfModuleDeclaration(node) {
-        return node.parent.kind === 225 && node.parent.name === node;
-    }
-    function isNameOfFunctionDeclaration(node) {
-        return node.kind === 69 &&
-            ts.isFunctionLike(node.parent) && node.parent.name === node;
-    }
-    function isObjectLiteralPropertyDeclaration(node) {
-        switch (node.kind) {
-            case 253:
-            case 254:
-            case 147:
-            case 149:
-            case 150:
-                return true;
-        }
-        return false;
-    }
-    function getContainingObjectLiteralElement(node) {
-        switch (node.kind) {
-            case 9:
-            case 8:
-                if (node.parent.kind === 140) {
-                    return isObjectLiteralPropertyDeclaration(node.parent.parent) ? node.parent.parent : undefined;
-                }
-            case 69:
-                return isObjectLiteralPropertyDeclaration(node.parent) && node.parent.name === node ? node.parent : undefined;
-        }
-        return undefined;
-    }
-    function isLiteralNameOfPropertyDeclarationOrIndexAccess(node) {
-        if (node.kind === 9 || node.kind === 8) {
-            switch (node.parent.kind) {
-                case 145:
-                case 144:
-                case 253:
-                case 255:
-                case 147:
-                case 146:
-                case 149:
-                case 150:
-                case 225:
-                    return node.parent.name === node;
-                case 173:
-                    return node.parent.argumentExpression === node;
-                case 140:
-                    return true;
-            }
-        }
-        return false;
-    }
-    function isNameOfExternalModuleImportOrDeclaration(node) {
-        if (node.kind === 9) {
-            return isNameOfModuleDeclaration(node) ||
-                (ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) && ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node);
-        }
-        return false;
-    }
-    function isInsideComment(sourceFile, token, position) {
-        return position <= token.getStart(sourceFile) &&
-            (isInsideCommentRange(ts.getTrailingCommentRanges(sourceFile.text, token.getFullStart())) ||
-                isInsideCommentRange(ts.getLeadingCommentRanges(sourceFile.text, token.getFullStart())));
-        function isInsideCommentRange(comments) {
-            return ts.forEach(comments, function (comment) {
-                if (comment.pos < position && position < comment.end) {
-                    return true;
-                }
-                else if (position === comment.end) {
-                    var text = sourceFile.text;
-                    var width = comment.end - comment.pos;
-                    if (width <= 2 || text.charCodeAt(comment.pos + 1) === 47) {
-                        return true;
-                    }
-                    else {
-                        return !(text.charCodeAt(comment.end - 1) === 47 &&
-                            text.charCodeAt(comment.end - 2) === 42);
-                    }
-                }
-                return false;
-            });
-        }
-    }
-    var keywordCompletions = [];
-    for (var i = 70; i <= 138; i++) {
-        keywordCompletions.push({
-            name: ts.tokenToString(i),
-            kind: ScriptElementKind.keyword,
-            kindModifiers: ScriptElementKindModifier.none,
-            sortText: "0"
-        });
-    }
-    function getContainerNode(node) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return undefined;
-            }
-            switch (node.kind) {
-                case 256:
-                case 147:
-                case 146:
-                case 220:
-                case 179:
-                case 149:
-                case 150:
-                case 221:
-                case 222:
-                case 224:
-                case 225:
-                    return node;
-            }
-        }
-    }
-    ts.getContainerNode = getContainerNode;
-    function getNodeKind(node) {
-        switch (node.kind) {
-            case 225: return ScriptElementKind.moduleElement;
-            case 221:
-            case 192:
-                return ScriptElementKind.classElement;
-            case 222: return ScriptElementKind.interfaceElement;
-            case 223: return ScriptElementKind.typeElement;
-            case 224: return ScriptElementKind.enumElement;
-            case 218:
-                return ts.isConst(node)
-                    ? ScriptElementKind.constElement
-                    : ts.isLet(node)
-                        ? ScriptElementKind.letElement
-                        : ScriptElementKind.variableElement;
-            case 220:
-            case 179:
-                return ScriptElementKind.functionElement;
-            case 149: return ScriptElementKind.memberGetAccessorElement;
-            case 150: return ScriptElementKind.memberSetAccessorElement;
-            case 147:
-            case 146:
-                return ScriptElementKind.memberFunctionElement;
-            case 145:
-            case 144:
-                return ScriptElementKind.memberVariableElement;
-            case 153: return ScriptElementKind.indexSignatureElement;
-            case 152: return ScriptElementKind.constructSignatureElement;
-            case 151: return ScriptElementKind.callSignatureElement;
-            case 148: return ScriptElementKind.constructorImplementationElement;
-            case 141: return ScriptElementKind.typeParameterElement;
-            case 255: return ScriptElementKind.variableElement;
-            case 142: return (node.flags & 92) ? ScriptElementKind.memberVariableElement : ScriptElementKind.parameterElement;
-            case 229:
-            case 234:
-            case 231:
-            case 238:
-            case 232:
-                return ScriptElementKind.alias;
-        }
-        return ScriptElementKind.unknown;
-    }
-    ts.getNodeKind = getNodeKind;
-    var CancellationTokenObject = (function () {
-        function CancellationTokenObject(cancellationToken) {
-            this.cancellationToken = cancellationToken;
-        }
-        CancellationTokenObject.prototype.isCancellationRequested = function () {
-            return this.cancellationToken && this.cancellationToken.isCancellationRequested();
-        };
-        CancellationTokenObject.prototype.throwIfCancellationRequested = function () {
-            if (this.isCancellationRequested()) {
-                throw new ts.OperationCanceledException();
-            }
-        };
-        return CancellationTokenObject;
-    }());
-    function createLanguageService(host, documentRegistry) {
-        if (documentRegistry === void 0) { documentRegistry = createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory()); }
-        var syntaxTreeCache = new SyntaxTreeCache(host);
-        var ruleProvider;
-        var program;
-        var lastProjectVersion;
-        var useCaseSensitivefileNames = false;
-        var cancellationToken = new CancellationTokenObject(host.getCancellationToken && host.getCancellationToken());
-        var currentDirectory = host.getCurrentDirectory();
-        if (!ts.localizedDiagnosticMessages && host.getLocalizedDiagnosticMessages) {
-            ts.localizedDiagnosticMessages = host.getLocalizedDiagnosticMessages();
-        }
-        function log(message) {
-            if (host.log) {
-                host.log(message);
-            }
-        }
-        var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitivefileNames);
-        function getValidSourceFile(fileName) {
-            var sourceFile = program.getSourceFile(fileName);
-            if (!sourceFile) {
-                throw new Error("Could not find file: '" + fileName + "'.");
-            }
-            return sourceFile;
-        }
-        function getRuleProvider(options) {
-            if (!ruleProvider) {
-                ruleProvider = new ts.formatting.RulesProvider();
-            }
-            ruleProvider.ensureUpToDate(options);
-            return ruleProvider;
-        }
-        function synchronizeHostData() {
-            if (host.getProjectVersion) {
-                var hostProjectVersion = host.getProjectVersion();
-                if (hostProjectVersion) {
-                    if (lastProjectVersion === hostProjectVersion) {
-                        return;
-                    }
-                    lastProjectVersion = hostProjectVersion;
-                }
-            }
-            var hostCache = new HostCache(host, getCanonicalFileName);
-            if (programUpToDate()) {
-                return;
-            }
-            var oldSettings = program && program.getCompilerOptions();
-            var newSettings = hostCache.compilationSettings();
-            var changesInCompilationSettingsAffectSyntax = oldSettings &&
-                (oldSettings.target !== newSettings.target ||
-                    oldSettings.module !== newSettings.module ||
-                    oldSettings.noResolve !== newSettings.noResolve ||
-                    oldSettings.jsx !== newSettings.jsx ||
-                    oldSettings.allowJs !== newSettings.allowJs);
-            var compilerHost = {
-                getSourceFile: getOrCreateSourceFile,
-                getSourceFileByPath: getOrCreateSourceFileByPath,
-                getCancellationToken: function () { return cancellationToken; },
-                getCanonicalFileName: getCanonicalFileName,
-                useCaseSensitiveFileNames: function () { return useCaseSensitivefileNames; },
-                getNewLine: function () { return ts.getNewLineOrDefaultFromHost(host); },
-                getDefaultLibFileName: function (options) { return host.getDefaultLibFileName(options); },
-                writeFile: function (fileName, data, writeByteOrderMark) { },
-                getCurrentDirectory: function () { return currentDirectory; },
-                fileExists: function (fileName) {
-                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
-                    return hostCache.getOrCreateEntry(fileName) !== undefined;
-                },
-                readFile: function (fileName) {
-                    var entry = hostCache.getOrCreateEntry(fileName);
-                    return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
-                },
-                directoryExists: function (directoryName) {
-                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
-                    return ts.directoryProbablyExists(directoryName, host);
-                }
-            };
-            if (host.trace) {
-                compilerHost.trace = function (message) { return host.trace(message); };
-            }
-            if (host.resolveModuleNames) {
-                compilerHost.resolveModuleNames = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
-            }
-            if (host.resolveTypeReferenceDirectives) {
-                compilerHost.resolveTypeReferenceDirectives = function (typeReferenceDirectiveNames, containingFile) {
-                    return host.resolveTypeReferenceDirectives(typeReferenceDirectiveNames, containingFile);
-                };
-            }
-            var documentRegistryBucketKey = documentRegistry.getKeyForCompilationSettings(newSettings);
-            var newProgram = ts.createProgram(hostCache.getRootFileNames(), newSettings, compilerHost, program);
-            if (program) {
-                var oldSourceFiles = program.getSourceFiles();
-                var oldSettingsKey = documentRegistry.getKeyForCompilationSettings(oldSettings);
-                for (var _i = 0, oldSourceFiles_1 = oldSourceFiles; _i < oldSourceFiles_1.length; _i++) {
-                    var oldSourceFile = oldSourceFiles_1[_i];
-                    if (!newProgram.getSourceFile(oldSourceFile.fileName) || changesInCompilationSettingsAffectSyntax) {
-                        documentRegistry.releaseDocumentWithKey(oldSourceFile.path, oldSettingsKey);
-                    }
-                }
-            }
-            hostCache = undefined;
-            program = newProgram;
-            program.getTypeChecker();
-            return;
-            function getOrCreateSourceFile(fileName) {
-                return getOrCreateSourceFileByPath(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName));
-            }
-            function getOrCreateSourceFileByPath(fileName, path) {
-                ts.Debug.assert(hostCache !== undefined);
-                var hostFileInformation = hostCache.getOrCreateEntryByPath(fileName, path);
-                if (!hostFileInformation) {
-                    return undefined;
-                }
-                if (!changesInCompilationSettingsAffectSyntax) {
-                    var oldSourceFile = program && program.getSourceFileByPath(path);
-                    if (oldSourceFile) {
-                        ts.Debug.assert(hostFileInformation.scriptKind === oldSourceFile.scriptKind, "Registered script kind (" + oldSourceFile.scriptKind + ") should match new script kind (" + hostFileInformation.scriptKind + ") for file: " + path);
-                        return documentRegistry.updateDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
-                    }
-                }
-                return documentRegistry.acquireDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
-            }
-            function sourceFileUpToDate(sourceFile) {
-                if (!sourceFile) {
-                    return false;
-                }
-                var path = sourceFile.path || ts.toPath(sourceFile.fileName, currentDirectory, getCanonicalFileName);
-                return sourceFile.version === hostCache.getVersion(path);
-            }
-            function programUpToDate() {
-                if (!program) {
-                    return false;
-                }
-                var rootFileNames = hostCache.getRootFileNames();
-                if (program.getSourceFiles().length !== rootFileNames.length) {
-                    return false;
-                }
-                for (var _i = 0, rootFileNames_2 = rootFileNames; _i < rootFileNames_2.length; _i++) {
-                    var fileName = rootFileNames_2[_i];
-                    if (!sourceFileUpToDate(program.getSourceFile(fileName))) {
-                        return false;
-                    }
-                }
-                return ts.compareDataObjects(program.getCompilerOptions(), hostCache.compilationSettings());
-            }
-        }
-        function getProgram() {
-            synchronizeHostData();
-            return program;
-        }
-        function cleanupSemanticCache() {
-        }
-        function dispose() {
-            if (program) {
-                ts.forEach(program.getSourceFiles(), function (f) {
-                    return documentRegistry.releaseDocument(f.fileName, program.getCompilerOptions());
-                });
-            }
-        }
-        function getSyntacticDiagnostics(fileName) {
-            synchronizeHostData();
-            return program.getSyntacticDiagnostics(getValidSourceFile(fileName), cancellationToken);
-        }
-        function getSemanticDiagnostics(fileName) {
-            synchronizeHostData();
-            var targetSourceFile = getValidSourceFile(fileName);
-            var semanticDiagnostics = program.getSemanticDiagnostics(targetSourceFile, cancellationToken);
-            if (!program.getCompilerOptions().declaration) {
-                return semanticDiagnostics;
-            }
-            var declarationDiagnostics = program.getDeclarationDiagnostics(targetSourceFile, cancellationToken);
-            return ts.concatenate(semanticDiagnostics, declarationDiagnostics);
-        }
-        function getCompilerOptionsDiagnostics() {
-            synchronizeHostData();
-            return program.getOptionsDiagnostics(cancellationToken).concat(program.getGlobalDiagnostics(cancellationToken));
-        }
-        function getCompletionEntryDisplayNameForSymbol(symbol, target, performCharacterChecks, location) {
-            var displayName = ts.getDeclaredName(program.getTypeChecker(), symbol, location);
-            if (displayName) {
-                var firstCharCode = displayName.charCodeAt(0);
-                if ((symbol.flags & 1536) && (firstCharCode === 39 || firstCharCode === 34)) {
-                    return undefined;
-                }
-            }
-            return getCompletionEntryDisplayName(displayName, target, performCharacterChecks);
-        }
-        function getCompletionEntryDisplayName(name, target, performCharacterChecks) {
-            if (!name) {
-                return undefined;
-            }
-            name = ts.stripQuotes(name);
-            if (!name) {
-                return undefined;
-            }
-            if (performCharacterChecks) {
-                if (!ts.isIdentifier(name, target)) {
-                    return undefined;
-                }
-            }
-            return name;
-        }
-        function getCompletionData(fileName, position) {
-            var typeChecker = program.getTypeChecker();
-            var sourceFile = getValidSourceFile(fileName);
-            var isJavaScriptFile = ts.isSourceFileJavaScript(sourceFile);
-            var isJsDocTagName = false;
-            var start = new Date().getTime();
-            var currentToken = ts.getTokenAtPosition(sourceFile, position);
-            log("getCompletionData: Get current token: " + (new Date().getTime() - start));
-            start = new Date().getTime();
-            var insideComment = isInsideComment(sourceFile, currentToken, position);
-            log("getCompletionData: Is inside comment: " + (new Date().getTime() - start));
-            if (insideComment) {
-                if (ts.hasDocComment(sourceFile, position) && sourceFile.text.charCodeAt(position - 1) === 64) {
-                    isJsDocTagName = true;
-                }
-                var insideJsDocTagExpression = false;
-                var tag = ts.getJsDocTagAtPosition(sourceFile, position);
-                if (tag) {
-                    if (tag.tagName.pos <= position && position <= tag.tagName.end) {
-                        isJsDocTagName = true;
-                    }
-                    switch (tag.kind) {
-                        case 277:
-                        case 275:
-                        case 276:
-                            var tagWithExpression = tag;
-                            if (tagWithExpression.typeExpression) {
-                                insideJsDocTagExpression = tagWithExpression.typeExpression.pos < position && position < tagWithExpression.typeExpression.end;
-                            }
-                            break;
-                    }
-                }
-                if (isJsDocTagName) {
-                    return { symbols: undefined, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, isJsDocTagName: isJsDocTagName };
-                }
-                if (!insideJsDocTagExpression) {
-                    log("Returning an empty list because completion was inside a regular comment or plain text part of a JsDoc comment.");
-                    return undefined;
-                }
-            }
-            start = new Date().getTime();
-            var previousToken = ts.findPrecedingToken(position, sourceFile);
-            log("getCompletionData: Get previous token 1: " + (new Date().getTime() - start));
-            var contextToken = previousToken;
-            if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
-                var start_5 = new Date().getTime();
-                contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
-                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_5));
-            }
-            var node = currentToken;
-            var isRightOfDot = false;
-            var isRightOfOpenTag = false;
-            var isStartingCloseTag = false;
-            var location = ts.getTouchingPropertyName(sourceFile, position);
-            if (contextToken) {
-                if (isCompletionListBlocker(contextToken)) {
-                    log("Returning an empty list because completion was requested in an invalid position.");
-                    return undefined;
-                }
-                var parent_16 = contextToken.parent, kind = contextToken.kind;
-                if (kind === 21) {
-                    if (parent_16.kind === 172) {
-                        node = contextToken.parent.expression;
-                        isRightOfDot = true;
-                    }
-                    else if (parent_16.kind === 139) {
-                        node = contextToken.parent.left;
-                        isRightOfDot = true;
-                    }
-                    else {
-                        return undefined;
-                    }
-                }
-                else if (sourceFile.languageVariant === 1) {
-                    if (kind === 25) {
-                        isRightOfOpenTag = true;
-                        location = contextToken;
-                    }
-                    else if (kind === 39 && contextToken.parent.kind === 245) {
-                        isStartingCloseTag = true;
-                        location = contextToken;
-                    }
-                }
-            }
-            var semanticStart = new Date().getTime();
-            var isMemberCompletion;
-            var isNewIdentifierLocation;
-            var symbols = [];
-            if (isRightOfDot) {
-                getTypeScriptMemberSymbols();
-            }
-            else if (isRightOfOpenTag) {
-                var tagSymbols = typeChecker.getJsxIntrinsicTagNames();
-                if (tryGetGlobalSymbols()) {
-                    symbols = tagSymbols.concat(symbols.filter(function (s) { return !!(s.flags & (107455 | 8388608)); }));
-                }
-                else {
-                    symbols = tagSymbols;
-                }
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-            }
-            else if (isStartingCloseTag) {
-                var tagName = contextToken.parent.parent.openingElement.tagName;
-                var tagSymbol = typeChecker.getSymbolAtLocation(tagName);
-                if (!typeChecker.isUnknownSymbol(tagSymbol)) {
-                    symbols = [tagSymbol];
-                }
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-            }
-            else {
-                if (!tryGetGlobalSymbols()) {
-                    return undefined;
-                }
-            }
-            log("getCompletionData: Semantic work: " + (new Date().getTime() - semanticStart));
-            return { symbols: symbols, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, location: location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), isJsDocTagName: isJsDocTagName };
-            function getTypeScriptMemberSymbols() {
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-                if (node.kind === 69 || node.kind === 139 || node.kind === 172) {
-                    var symbol = typeChecker.getSymbolAtLocation(node);
-                    if (symbol && symbol.flags & 8388608) {
-                        symbol = typeChecker.getAliasedSymbol(symbol);
-                    }
-                    if (symbol && symbol.flags & 1952) {
-                        var exportedSymbols = typeChecker.getExportsOfModule(symbol);
-                        ts.forEach(exportedSymbols, function (symbol) {
-                            if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
-                                symbols.push(symbol);
-                            }
-                        });
-                    }
-                }
-                var type = typeChecker.getTypeAtLocation(node);
-                addTypeProperties(type);
-            }
-            function addTypeProperties(type) {
-                if (type) {
-                    for (var _i = 0, _a = type.getApparentProperties(); _i < _a.length; _i++) {
-                        var symbol = _a[_i];
-                        if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
-                            symbols.push(symbol);
-                        }
-                    }
-                    if (isJavaScriptFile && type.flags & 16384) {
-                        var unionType = type;
-                        for (var _b = 0, _c = unionType.types; _b < _c.length; _b++) {
-                            var elementType = _c[_b];
-                            addTypeProperties(elementType);
-                        }
-                    }
-                }
-            }
-            function tryGetGlobalSymbols() {
-                var objectLikeContainer;
-                var namedImportsOrExports;
-                var jsxContainer;
-                if (objectLikeContainer = tryGetObjectLikeCompletionContainer(contextToken)) {
-                    return tryGetObjectLikeCompletionSymbols(objectLikeContainer);
-                }
-                if (namedImportsOrExports = tryGetNamedImportsOrExportsForCompletion(contextToken)) {
-                    return tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports);
-                }
-                if (jsxContainer = tryGetContainingJsxElement(contextToken)) {
-                    var attrsType = void 0;
-                    if ((jsxContainer.kind === 242) || (jsxContainer.kind === 243)) {
-                        attrsType = typeChecker.getJsxElementAttributesType(jsxContainer);
-                        if (attrsType) {
-                            symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), jsxContainer.attributes);
-                            isMemberCompletion = true;
-                            isNewIdentifierLocation = false;
-                            return true;
-                        }
-                    }
-                }
-                isMemberCompletion = false;
-                isNewIdentifierLocation = isNewIdentifierDefinitionLocation(contextToken);
-                if (previousToken !== contextToken) {
-                    ts.Debug.assert(!!previousToken, "Expected 'contextToken' to be defined when different from 'previousToken'.");
-                }
-                var adjustedPosition = previousToken !== contextToken ?
-                    previousToken.getStart() :
-                    position;
-                var scopeNode = getScopeNode(contextToken, adjustedPosition, sourceFile) || sourceFile;
-                var symbolMeanings = 793056 | 107455 | 1536 | 8388608;
-                symbols = typeChecker.getSymbolsInScope(scopeNode, symbolMeanings);
-                return true;
-            }
-            function getScopeNode(initialToken, position, sourceFile) {
-                var scope = initialToken;
-                while (scope && !ts.positionBelongsToNode(scope, position, sourceFile)) {
-                    scope = scope.parent;
-                }
-                return scope;
-            }
-            function isCompletionListBlocker(contextToken) {
-                var start = new Date().getTime();
-                var result = isInStringOrRegularExpressionOrTemplateLiteral(contextToken) ||
-                    isSolelyIdentifierDefinitionLocation(contextToken) ||
-                    isDotOfNumericLiteral(contextToken) ||
-                    isInJsxText(contextToken);
-                log("getCompletionsAtPosition: isCompletionListBlocker: " + (new Date().getTime() - start));
-                return result;
-            }
-            function isInJsxText(contextToken) {
-                if (contextToken.kind === 244) {
-                    return true;
-                }
-                if (contextToken.kind === 27 && contextToken.parent) {
-                    if (contextToken.parent.kind === 243) {
-                        return true;
-                    }
-                    if (contextToken.parent.kind === 245 || contextToken.parent.kind === 242) {
-                        return contextToken.parent.parent && contextToken.parent.parent.kind === 241;
-                    }
-                }
-                return false;
-            }
-            function isNewIdentifierDefinitionLocation(previousToken) {
-                if (previousToken) {
-                    var containingNodeKind = previousToken.parent.kind;
-                    switch (previousToken.kind) {
-                        case 24:
-                            return containingNodeKind === 174
-                                || containingNodeKind === 148
-                                || containingNodeKind === 175
-                                || containingNodeKind === 170
-                                || containingNodeKind === 187
-                                || containingNodeKind === 156;
-                        case 17:
-                            return containingNodeKind === 174
-                                || containingNodeKind === 148
-                                || containingNodeKind === 175
-                                || containingNodeKind === 178
-                                || containingNodeKind === 164;
-                        case 19:
-                            return containingNodeKind === 170
-                                || containingNodeKind === 153
-                                || containingNodeKind === 140;
-                        case 125:
-                        case 126:
-                            return true;
-                        case 21:
-                            return containingNodeKind === 225;
-                        case 15:
-                            return containingNodeKind === 221;
-                        case 56:
-                            return containingNodeKind === 218
-                                || containingNodeKind === 187;
-                        case 12:
-                            return containingNodeKind === 189;
-                        case 13:
-                            return containingNodeKind === 197;
-                        case 112:
-                        case 110:
-                        case 111:
-                            return containingNodeKind === 145;
-                    }
-                    switch (previousToken.getText()) {
-                        case "public":
-                        case "protected":
-                        case "private":
-                            return true;
-                    }
-                }
-                return false;
-            }
-            function isInStringOrRegularExpressionOrTemplateLiteral(contextToken) {
-                if (contextToken.kind === 9
-                    || contextToken.kind === 166
-                    || contextToken.kind === 10
-                    || ts.isTemplateLiteralKind(contextToken.kind)) {
-                    var start_6 = contextToken.getStart();
-                    var end = contextToken.getEnd();
-                    if (start_6 < position && position < end) {
-                        return true;
-                    }
-                    if (position === end) {
-                        return !!contextToken.isUnterminated
-                            || contextToken.kind === 10;
-                    }
-                }
-                return false;
-            }
-            function tryGetObjectLikeCompletionSymbols(objectLikeContainer) {
-                isMemberCompletion = true;
-                var typeForObject;
-                var existingMembers;
-                if (objectLikeContainer.kind === 171) {
-                    isNewIdentifierLocation = true;
-                    typeForObject = typeChecker.getContextualType(objectLikeContainer);
-                    existingMembers = objectLikeContainer.properties;
-                }
-                else if (objectLikeContainer.kind === 167) {
-                    isNewIdentifierLocation = false;
-                    var rootDeclaration = ts.getRootDeclaration(objectLikeContainer.parent);
-                    if (ts.isVariableLike(rootDeclaration)) {
-                        var canGetType = !!(rootDeclaration.initializer || rootDeclaration.type);
-                        if (!canGetType && rootDeclaration.kind === 142) {
-                            if (ts.isExpression(rootDeclaration.parent)) {
-                                canGetType = !!typeChecker.getContextualType(rootDeclaration.parent);
-                            }
-                            else if (rootDeclaration.parent.kind === 147 || rootDeclaration.parent.kind === 150) {
-                                canGetType = ts.isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(rootDeclaration.parent.parent);
-                            }
-                        }
-                        if (canGetType) {
-                            typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
-                            existingMembers = objectLikeContainer.elements;
-                        }
-                    }
-                    else {
-                        ts.Debug.fail("Root declaration is not variable-like.");
-                    }
-                }
-                else {
-                    ts.Debug.fail("Expected object literal or binding pattern, got " + objectLikeContainer.kind);
-                }
-                if (!typeForObject) {
-                    return false;
-                }
-                var typeMembers = typeChecker.getPropertiesOfType(typeForObject);
-                if (typeMembers && typeMembers.length > 0) {
-                    symbols = filterObjectMembersList(typeMembers, existingMembers);
-                }
-                return true;
-            }
-            function tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports) {
-                var declarationKind = namedImportsOrExports.kind === 233 ?
-                    230 :
-                    236;
-                var importOrExportDeclaration = ts.getAncestor(namedImportsOrExports, declarationKind);
-                var moduleSpecifier = importOrExportDeclaration.moduleSpecifier;
-                if (!moduleSpecifier) {
-                    return false;
-                }
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-                var exports;
-                var moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(importOrExportDeclaration.moduleSpecifier);
-                if (moduleSpecifierSymbol) {
-                    exports = typeChecker.getExportsOfModule(moduleSpecifierSymbol);
-                }
-                symbols = exports ? filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements) : emptyArray;
-                return true;
-            }
-            function tryGetObjectLikeCompletionContainer(contextToken) {
-                if (contextToken) {
-                    switch (contextToken.kind) {
-                        case 15:
-                        case 24:
-                            var parent_17 = contextToken.parent;
-                            if (parent_17 && (parent_17.kind === 171 || parent_17.kind === 167)) {
-                                return parent_17;
-                            }
-                            break;
-                    }
-                }
-                return undefined;
-            }
-            function tryGetNamedImportsOrExportsForCompletion(contextToken) {
-                if (contextToken) {
-                    switch (contextToken.kind) {
-                        case 15:
-                        case 24:
-                            switch (contextToken.parent.kind) {
-                                case 233:
-                                case 237:
-                                    return contextToken.parent;
-                            }
-                    }
-                }
-                return undefined;
-            }
-            function tryGetContainingJsxElement(contextToken) {
-                if (contextToken) {
-                    var parent_18 = contextToken.parent;
-                    switch (contextToken.kind) {
-                        case 26:
-                        case 39:
-                        case 69:
-                        case 246:
-                        case 247:
-                            if (parent_18 && (parent_18.kind === 242 || parent_18.kind === 243)) {
-                                return parent_18;
-                            }
-                            else if (parent_18.kind === 246) {
-                                return parent_18.parent;
-                            }
-                            break;
-                        case 9:
-                            if (parent_18 && ((parent_18.kind === 246) || (parent_18.kind === 247))) {
-                                return parent_18.parent;
-                            }
-                            break;
-                        case 16:
-                            if (parent_18 &&
-                                parent_18.kind === 248 &&
-                                parent_18.parent &&
-                                (parent_18.parent.kind === 246)) {
-                                return parent_18.parent.parent;
-                            }
-                            if (parent_18 && parent_18.kind === 247) {
-                                return parent_18.parent;
-                            }
-                            break;
-                    }
-                }
-                return undefined;
-            }
-            function isFunction(kind) {
-                switch (kind) {
-                    case 179:
-                    case 180:
-                    case 220:
-                    case 147:
-                    case 146:
-                    case 149:
-                    case 150:
-                    case 151:
-                    case 152:
-                    case 153:
-                        return true;
-                }
-                return false;
-            }
-            function isSolelyIdentifierDefinitionLocation(contextToken) {
-                var containingNodeKind = contextToken.parent.kind;
-                switch (contextToken.kind) {
-                    case 24:
-                        return containingNodeKind === 218 ||
-                            containingNodeKind === 219 ||
-                            containingNodeKind === 200 ||
-                            containingNodeKind === 224 ||
-                            isFunction(containingNodeKind) ||
-                            containingNodeKind === 221 ||
-                            containingNodeKind === 192 ||
-                            containingNodeKind === 222 ||
-                            containingNodeKind === 168 ||
-                            containingNodeKind === 223;
-                    case 21:
-                        return containingNodeKind === 168;
-                    case 54:
-                        return containingNodeKind === 169;
-                    case 19:
-                        return containingNodeKind === 168;
-                    case 17:
-                        return containingNodeKind === 252 ||
-                            isFunction(containingNodeKind);
-                    case 15:
-                        return containingNodeKind === 224 ||
-                            containingNodeKind === 222 ||
-                            containingNodeKind === 159;
-                    case 23:
-                        return containingNodeKind === 144 &&
-                            contextToken.parent && contextToken.parent.parent &&
-                            (contextToken.parent.parent.kind === 222 ||
-                                contextToken.parent.parent.kind === 159);
-                    case 25:
-                        return containingNodeKind === 221 ||
-                            containingNodeKind === 192 ||
-                            containingNodeKind === 222 ||
-                            containingNodeKind === 223 ||
-                            isFunction(containingNodeKind);
-                    case 113:
-                        return containingNodeKind === 145;
-                    case 22:
-                        return containingNodeKind === 142 ||
-                            (contextToken.parent && contextToken.parent.parent &&
-                                contextToken.parent.parent.kind === 168);
-                    case 112:
-                    case 110:
-                    case 111:
-                        return containingNodeKind === 142;
-                    case 116:
-                        return containingNodeKind === 234 ||
-                            containingNodeKind === 238 ||
-                            containingNodeKind === 232;
-                    case 73:
-                    case 81:
-                    case 107:
-                    case 87:
-                    case 102:
-                    case 123:
-                    case 131:
-                    case 89:
-                    case 108:
-                    case 74:
-                    case 114:
-                    case 134:
-                        return true;
-                }
-                switch (contextToken.getText()) {
-                    case "abstract":
-                    case "async":
-                    case "class":
-                    case "const":
-                    case "declare":
-                    case "enum":
-                    case "function":
-                    case "interface":
-                    case "let":
-                    case "private":
-                    case "protected":
-                    case "public":
-                    case "static":
-                    case "var":
-                    case "yield":
-                        return true;
-                }
-                return false;
-            }
-            function isDotOfNumericLiteral(contextToken) {
-                if (contextToken.kind === 8) {
-                    var text = contextToken.getFullText();
-                    return text.charAt(text.length - 1) === ".";
-                }
-                return false;
-            }
-            function filterNamedImportOrExportCompletionItems(exportsOfModule, namedImportsOrExports) {
-                var existingImportsOrExports = {};
-                for (var _i = 0, namedImportsOrExports_1 = namedImportsOrExports; _i < namedImportsOrExports_1.length; _i++) {
-                    var element = namedImportsOrExports_1[_i];
-                    if (element.getStart() <= position && position <= element.getEnd()) {
-                        continue;
-                    }
-                    var name_39 = element.propertyName || element.name;
-                    existingImportsOrExports[name_39.text] = true;
-                }
-                if (ts.isEmpty(existingImportsOrExports)) {
-                    return ts.filter(exportsOfModule, function (e) { return e.name !== "default"; });
-                }
-                return ts.filter(exportsOfModule, function (e) { return e.name !== "default" && !ts.lookUp(existingImportsOrExports, e.name); });
-            }
-            function filterObjectMembersList(contextualMemberSymbols, existingMembers) {
-                if (!existingMembers || existingMembers.length === 0) {
-                    return contextualMemberSymbols;
-                }
-                var existingMemberNames = {};
-                for (var _i = 0, existingMembers_1 = existingMembers; _i < existingMembers_1.length; _i++) {
-                    var m = existingMembers_1[_i];
-                    if (m.kind !== 253 &&
-                        m.kind !== 254 &&
-                        m.kind !== 169 &&
-                        m.kind !== 147) {
-                        continue;
-                    }
-                    if (m.getStart() <= position && position <= m.getEnd()) {
-                        continue;
-                    }
-                    var existingName = void 0;
-                    if (m.kind === 169 && m.propertyName) {
-                        if (m.propertyName.kind === 69) {
-                            existingName = m.propertyName.text;
-                        }
-                    }
-                    else {
-                        existingName = m.name.text;
-                    }
-                    existingMemberNames[existingName] = true;
-                }
-                return ts.filter(contextualMemberSymbols, function (m) { return !ts.lookUp(existingMemberNames, m.name); });
-            }
-            function filterJsxAttributes(symbols, attributes) {
-                var seenNames = {};
-                for (var _i = 0, attributes_1 = attributes; _i < attributes_1.length; _i++) {
-                    var attr = attributes_1[_i];
-                    if (attr.getStart() <= position && position <= attr.getEnd()) {
-                        continue;
-                    }
-                    if (attr.kind === 246) {
-                        seenNames[attr.name.text] = true;
-                    }
-                }
-                return ts.filter(symbols, function (a) { return !ts.lookUp(seenNames, a.name); });
-            }
-        }
-        function getCompletionsAtPosition(fileName, position) {
-            synchronizeHostData();
-            var completionData = getCompletionData(fileName, position);
-            if (!completionData) {
-                return undefined;
-            }
-            var symbols = completionData.symbols, isMemberCompletion = completionData.isMemberCompletion, isNewIdentifierLocation = completionData.isNewIdentifierLocation, location = completionData.location, isJsDocTagName = completionData.isJsDocTagName;
-            if (isJsDocTagName) {
-                return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: getAllJsDocCompletionEntries() };
-            }
-            var sourceFile = getValidSourceFile(fileName);
-            var entries = [];
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                var uniqueNames = getCompletionEntriesFromSymbols(symbols, entries);
-                ts.addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames));
-            }
-            else {
-                if (!symbols || symbols.length === 0) {
-                    if (sourceFile.languageVariant === 1 &&
-                        location.parent && location.parent.kind === 245) {
-                        var tagName = location.parent.parent.openingElement.tagName;
-                        entries.push({
-                            name: tagName.text,
-                            kind: undefined,
-                            kindModifiers: undefined,
-                            sortText: "0"
-                        });
-                    }
-                    else {
-                        return undefined;
-                    }
-                }
-                getCompletionEntriesFromSymbols(symbols, entries);
-            }
-            if (!isMemberCompletion && !isJsDocTagName) {
-                ts.addRange(entries, keywordCompletions);
-            }
-            return { isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries: entries };
-            function getJavaScriptCompletionEntries(sourceFile, position, uniqueNames) {
-                var entries = [];
-                var target = program.getCompilerOptions().target;
-                var nameTable = getNameTable(sourceFile);
-                for (var name_40 in nameTable) {
-                    if (nameTable[name_40] === position) {
-                        continue;
-                    }
-                    if (!uniqueNames[name_40]) {
-                        uniqueNames[name_40] = name_40;
-                        var displayName = getCompletionEntryDisplayName(name_40, target, true);
-                        if (displayName) {
-                            var entry = {
-                                name: displayName,
-                                kind: ScriptElementKind.warning,
-                                kindModifiers: "",
-                                sortText: "1"
-                            };
-                            entries.push(entry);
-                        }
-                    }
-                }
-                return entries;
-            }
-            function getAllJsDocCompletionEntries() {
-                return jsDocCompletionEntries || (jsDocCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
-                    return {
-                        name: tagName,
-                        kind: ScriptElementKind.keyword,
-                        kindModifiers: "",
-                        sortText: "0"
-                    };
-                }));
-            }
-            function createCompletionEntry(symbol, location) {
-                var displayName = getCompletionEntryDisplayNameForSymbol(symbol, program.getCompilerOptions().target, true, location);
-                if (!displayName) {
-                    return undefined;
-                }
-                return {
-                    name: displayName,
-                    kind: getSymbolKind(symbol, location),
-                    kindModifiers: getSymbolModifiers(symbol),
-                    sortText: "0"
-                };
-            }
-            function getCompletionEntriesFromSymbols(symbols, entries) {
-                var start = new Date().getTime();
-                var uniqueNames = {};
-                if (symbols) {
-                    for (var _i = 0, symbols_4 = symbols; _i < symbols_4.length; _i++) {
-                        var symbol = symbols_4[_i];
-                        var entry = createCompletionEntry(symbol, location);
-                        if (entry) {
-                            var id = ts.escapeIdentifier(entry.name);
-                            if (!ts.lookUp(uniqueNames, id)) {
-                                entries.push(entry);
-                                uniqueNames[id] = id;
-                            }
-                        }
-                    }
-                }
-                log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (new Date().getTime() - start));
-                return uniqueNames;
-            }
-        }
-        function getCompletionEntryDetails(fileName, position, entryName) {
-            synchronizeHostData();
-            var completionData = getCompletionData(fileName, position);
-            if (completionData) {
-                var symbols = completionData.symbols, location_2 = completionData.location;
-                var target_2 = program.getCompilerOptions().target;
-                var symbol = ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(s, target_2, false, location_2) === entryName ? s : undefined; });
-                if (symbol) {
-                    var _a = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, getValidSourceFile(fileName), location_2, location_2, 7), displayParts = _a.displayParts, documentation = _a.documentation, symbolKind = _a.symbolKind;
-                    return {
-                        name: entryName,
-                        kindModifiers: getSymbolModifiers(symbol),
-                        kind: symbolKind,
-                        displayParts: displayParts,
-                        documentation: documentation
-                    };
-                }
-            }
-            var keywordCompletion = ts.forEach(keywordCompletions, function (c) { return c.name === entryName; });
-            if (keywordCompletion) {
-                return {
-                    name: entryName,
-                    kind: ScriptElementKind.keyword,
-                    kindModifiers: ScriptElementKindModifier.none,
-                    displayParts: [ts.displayPart(entryName, SymbolDisplayPartKind.keyword)],
-                    documentation: undefined
-                };
-            }
-            return undefined;
-        }
-        function getSymbolKind(symbol, location) {
-            var flags = symbol.getFlags();
-            if (flags & 32)
-                return ts.getDeclarationOfKind(symbol, 192) ?
-                    ScriptElementKind.localClassElement : ScriptElementKind.classElement;
-            if (flags & 384)
-                return ScriptElementKind.enumElement;
-            if (flags & 524288)
-                return ScriptElementKind.typeElement;
-            if (flags & 64)
-                return ScriptElementKind.interfaceElement;
-            if (flags & 262144)
-                return ScriptElementKind.typeParameterElement;
-            var result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location);
-            if (result === ScriptElementKind.unknown) {
-                if (flags & 262144)
-                    return ScriptElementKind.typeParameterElement;
-                if (flags & 8)
-                    return ScriptElementKind.variableElement;
-                if (flags & 8388608)
-                    return ScriptElementKind.alias;
-                if (flags & 1536)
-                    return ScriptElementKind.moduleElement;
-            }
-            return result;
-        }
-        function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location) {
-            var typeChecker = program.getTypeChecker();
-            if (typeChecker.isUndefinedSymbol(symbol)) {
-                return ScriptElementKind.variableElement;
-            }
-            if (typeChecker.isArgumentsSymbol(symbol)) {
-                return ScriptElementKind.localVariableElement;
-            }
-            if (location.kind === 97 && ts.isExpression(location)) {
-                return ScriptElementKind.parameterElement;
-            }
-            if (flags & 3) {
-                if (ts.isFirstDeclarationOfSymbolParameter(symbol)) {
-                    return ScriptElementKind.parameterElement;
-                }
-                else if (symbol.valueDeclaration && ts.isConst(symbol.valueDeclaration)) {
-                    return ScriptElementKind.constElement;
-                }
-                else if (ts.forEach(symbol.declarations, ts.isLet)) {
-                    return ScriptElementKind.letElement;
-                }
-                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localVariableElement : ScriptElementKind.variableElement;
-            }
-            if (flags & 16)
-                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localFunctionElement : ScriptElementKind.functionElement;
-            if (flags & 32768)
-                return ScriptElementKind.memberGetAccessorElement;
-            if (flags & 65536)
-                return ScriptElementKind.memberSetAccessorElement;
-            if (flags & 8192)
-                return ScriptElementKind.memberFunctionElement;
-            if (flags & 16384)
-                return ScriptElementKind.constructorImplementationElement;
-            if (flags & 4) {
-                if (flags & 268435456) {
-                    var unionPropertyKind = ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
-                        var rootSymbolFlags = rootSymbol.getFlags();
-                        if (rootSymbolFlags & (98308 | 3)) {
-                            return ScriptElementKind.memberVariableElement;
-                        }
-                        ts.Debug.assert(!!(rootSymbolFlags & 8192));
-                    });
-                    if (!unionPropertyKind) {
-                        var typeOfUnionProperty = typeChecker.getTypeOfSymbolAtLocation(symbol, location);
-                        if (typeOfUnionProperty.getCallSignatures().length) {
-                            return ScriptElementKind.memberFunctionElement;
-                        }
-                        return ScriptElementKind.memberVariableElement;
-                    }
-                    return unionPropertyKind;
-                }
-                return ScriptElementKind.memberVariableElement;
-            }
-            return ScriptElementKind.unknown;
-        }
-        function getSymbolModifiers(symbol) {
-            return symbol && symbol.declarations && symbol.declarations.length > 0
-                ? ts.getNodeModifiers(symbol.declarations[0])
-                : ScriptElementKindModifier.none;
-        }
-        function getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, enclosingDeclaration, location, semanticMeaning) {
-            if (semanticMeaning === void 0) { semanticMeaning = getMeaningFromLocation(location); }
-            var typeChecker = program.getTypeChecker();
-            var displayParts = [];
-            var documentation;
-            var symbolFlags = symbol.flags;
-            var symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, symbolFlags, location);
-            var hasAddedSymbolInfo;
-            var isThisExpression = location.kind === 97 && ts.isExpression(location);
-            var type;
-            if (symbolKind !== ScriptElementKind.unknown || symbolFlags & 32 || symbolFlags & 8388608) {
-                if (symbolKind === ScriptElementKind.memberGetAccessorElement || symbolKind === ScriptElementKind.memberSetAccessorElement) {
-                    symbolKind = ScriptElementKind.memberVariableElement;
-                }
-                var signature = void 0;
-                type = isThisExpression ? typeChecker.getTypeAtLocation(location) : typeChecker.getTypeOfSymbolAtLocation(symbol, location);
-                if (type) {
-                    if (location.parent && location.parent.kind === 172) {
-                        var right = location.parent.name;
-                        if (right === location || (right && right.getFullWidth() === 0)) {
-                            location = location.parent;
-                        }
-                    }
-                    var callExpression = void 0;
-                    if (location.kind === 174 || location.kind === 175) {
-                        callExpression = location;
-                    }
-                    else if (isCallExpressionTarget(location) || isNewExpressionTarget(location)) {
-                        callExpression = location.parent;
-                    }
-                    if (callExpression) {
-                        var candidateSignatures = [];
-                        signature = typeChecker.getResolvedSignature(callExpression, candidateSignatures);
-                        if (!signature && candidateSignatures.length) {
-                            signature = candidateSignatures[0];
-                        }
-                        var useConstructSignatures = callExpression.kind === 175 || callExpression.expression.kind === 95;
-                        var allSignatures = useConstructSignatures ? type.getConstructSignatures() : type.getCallSignatures();
-                        if (!ts.contains(allSignatures, signature.target) && !ts.contains(allSignatures, signature)) {
-                            signature = allSignatures.length ? allSignatures[0] : undefined;
-                        }
-                        if (signature) {
-                            if (useConstructSignatures && (symbolFlags & 32)) {
-                                symbolKind = ScriptElementKind.constructorImplementationElement;
-                                addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
-                            }
-                            else if (symbolFlags & 8388608) {
-                                symbolKind = ScriptElementKind.alias;
-                                pushTypePart(symbolKind);
-                                displayParts.push(ts.spacePart());
-                                if (useConstructSignatures) {
-                                    displayParts.push(ts.keywordPart(92));
-                                    displayParts.push(ts.spacePart());
-                                }
-                                addFullSymbolName(symbol);
-                            }
-                            else {
-                                addPrefixForAnyFunctionOrVar(symbol, symbolKind);
-                            }
-                            switch (symbolKind) {
-                                case ScriptElementKind.memberVariableElement:
-                                case ScriptElementKind.variableElement:
-                                case ScriptElementKind.constElement:
-                                case ScriptElementKind.letElement:
-                                case ScriptElementKind.parameterElement:
-                                case ScriptElementKind.localVariableElement:
-                                    displayParts.push(ts.punctuationPart(54));
-                                    displayParts.push(ts.spacePart());
-                                    if (useConstructSignatures) {
-                                        displayParts.push(ts.keywordPart(92));
-                                        displayParts.push(ts.spacePart());
-                                    }
-                                    if (!(type.flags & 65536) && type.symbol) {
-                                        ts.addRange(displayParts, ts.symbolToDisplayParts(typeChecker, type.symbol, enclosingDeclaration, undefined, 1));
-                                    }
-                                    addSignatureDisplayParts(signature, allSignatures, 8);
-                                    break;
-                                default:
-                                    addSignatureDisplayParts(signature, allSignatures);
-                            }
-                            hasAddedSymbolInfo = true;
-                        }
-                    }
-                    else if ((isNameOfFunctionDeclaration(location) && !(symbol.flags & 98304)) ||
-                        (location.kind === 121 && location.parent.kind === 148)) {
-                        var functionDeclaration = location.parent;
-                        var allSignatures = functionDeclaration.kind === 148 ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
-                        if (!typeChecker.isImplementationOfOverload(functionDeclaration)) {
-                            signature = typeChecker.getSignatureFromDeclaration(functionDeclaration);
-                        }
-                        else {
-                            signature = allSignatures[0];
-                        }
-                        if (functionDeclaration.kind === 148) {
-                            symbolKind = ScriptElementKind.constructorImplementationElement;
-                            addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
-                        }
-                        else {
-                            addPrefixForAnyFunctionOrVar(functionDeclaration.kind === 151 &&
-                                !(type.symbol.flags & 2048 || type.symbol.flags & 4096) ? type.symbol : symbol, symbolKind);
-                        }
-                        addSignatureDisplayParts(signature, allSignatures);
-                        hasAddedSymbolInfo = true;
-                    }
-                }
-            }
-            if (symbolFlags & 32 && !hasAddedSymbolInfo && !isThisExpression) {
-                if (ts.getDeclarationOfKind(symbol, 192)) {
-                    pushTypePart(ScriptElementKind.localClassElement);
-                }
-                else {
-                    displayParts.push(ts.keywordPart(73));
-                }
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                writeTypeParametersOfSymbol(symbol, sourceFile);
-            }
-            if ((symbolFlags & 64) && (semanticMeaning & 2)) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(107));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                writeTypeParametersOfSymbol(symbol, sourceFile);
-            }
-            if (symbolFlags & 524288) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(134));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                writeTypeParametersOfSymbol(symbol, sourceFile);
-                displayParts.push(ts.spacePart());
-                displayParts.push(ts.operatorPart(56));
-                displayParts.push(ts.spacePart());
-                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, typeChecker.getDeclaredTypeOfSymbol(symbol), enclosingDeclaration));
-            }
-            if (symbolFlags & 384) {
-                addNewLineIfDisplayPartsExist();
-                if (ts.forEach(symbol.declarations, ts.isConstEnumDeclaration)) {
-                    displayParts.push(ts.keywordPart(74));
-                    displayParts.push(ts.spacePart());
-                }
-                displayParts.push(ts.keywordPart(81));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-            }
-            if (symbolFlags & 1536) {
-                addNewLineIfDisplayPartsExist();
-                var declaration = ts.getDeclarationOfKind(symbol, 225);
-                var isNamespace = declaration && declaration.name && declaration.name.kind === 69;
-                displayParts.push(ts.keywordPart(isNamespace ? 126 : 125));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-            }
-            if ((symbolFlags & 262144) && (semanticMeaning & 2)) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.punctuationPart(17));
-                displayParts.push(ts.textPart("type parameter"));
-                displayParts.push(ts.punctuationPart(18));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                displayParts.push(ts.spacePart());
-                displayParts.push(ts.keywordPart(90));
-                displayParts.push(ts.spacePart());
-                if (symbol.parent) {
-                    addFullSymbolName(symbol.parent, enclosingDeclaration);
-                    writeTypeParametersOfSymbol(symbol.parent, enclosingDeclaration);
-                }
-                else {
-                    var declaration = ts.getDeclarationOfKind(symbol, 141);
-                    ts.Debug.assert(declaration !== undefined);
-                    declaration = declaration.parent;
-                    if (declaration) {
-                        if (ts.isFunctionLikeKind(declaration.kind)) {
-                            var signature = typeChecker.getSignatureFromDeclaration(declaration);
-                            if (declaration.kind === 152) {
-                                displayParts.push(ts.keywordPart(92));
-                                displayParts.push(ts.spacePart());
-                            }
-                            else if (declaration.kind !== 151 && declaration.name) {
-                                addFullSymbolName(declaration.symbol);
-                            }
-                            ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, sourceFile, 32));
-                        }
-                        else {
-                            displayParts.push(ts.keywordPart(134));
-                            displayParts.push(ts.spacePart());
-                            addFullSymbolName(declaration.symbol);
-                            writeTypeParametersOfSymbol(declaration.symbol, sourceFile);
-                        }
-                    }
-                }
-            }
-            if (symbolFlags & 8) {
-                addPrefixForAnyFunctionOrVar(symbol, "enum member");
-                var declaration = symbol.declarations[0];
-                if (declaration.kind === 255) {
-                    var constantValue = typeChecker.getConstantValue(declaration);
-                    if (constantValue !== undefined) {
-                        displayParts.push(ts.spacePart());
-                        displayParts.push(ts.operatorPart(56));
-                        displayParts.push(ts.spacePart());
-                        displayParts.push(ts.displayPart(constantValue.toString(), SymbolDisplayPartKind.numericLiteral));
-                    }
-                }
-            }
-            if (symbolFlags & 8388608) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(89));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                ts.forEach(symbol.declarations, function (declaration) {
-                    if (declaration.kind === 229) {
-                        var importEqualsDeclaration = declaration;
-                        if (ts.isExternalModuleImportEqualsDeclaration(importEqualsDeclaration)) {
-                            displayParts.push(ts.spacePart());
-                            displayParts.push(ts.operatorPart(56));
-                            displayParts.push(ts.spacePart());
-                            displayParts.push(ts.keywordPart(129));
-                            displayParts.push(ts.punctuationPart(17));
-                            displayParts.push(ts.displayPart(ts.getTextOfNode(ts.getExternalModuleImportEqualsDeclarationExpression(importEqualsDeclaration)), SymbolDisplayPartKind.stringLiteral));
-                            displayParts.push(ts.punctuationPart(18));
-                        }
-                        else {
-                            var internalAliasSymbol = typeChecker.getSymbolAtLocation(importEqualsDeclaration.moduleReference);
-                            if (internalAliasSymbol) {
-                                displayParts.push(ts.spacePart());
-                                displayParts.push(ts.operatorPart(56));
-                                displayParts.push(ts.spacePart());
-                                addFullSymbolName(internalAliasSymbol, enclosingDeclaration);
-                            }
-                        }
-                        return true;
-                    }
-                });
-            }
-            if (!hasAddedSymbolInfo) {
-                if (symbolKind !== ScriptElementKind.unknown) {
-                    if (type) {
-                        if (isThisExpression) {
-                            addNewLineIfDisplayPartsExist();
-                            displayParts.push(ts.keywordPart(97));
-                        }
-                        else {
-                            addPrefixForAnyFunctionOrVar(symbol, symbolKind);
-                        }
-                        if (symbolKind === ScriptElementKind.memberVariableElement ||
-                            symbolFlags & 3 ||
-                            symbolKind === ScriptElementKind.localVariableElement ||
-                            isThisExpression) {
-                            displayParts.push(ts.punctuationPart(54));
-                            displayParts.push(ts.spacePart());
-                            if (type.symbol && type.symbol.flags & 262144) {
-                                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
-                                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(type, writer, enclosingDeclaration);
-                                });
-                                ts.addRange(displayParts, typeParameterParts);
-                            }
-                            else {
-                                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, type, enclosingDeclaration));
-                            }
-                        }
-                        else if (symbolFlags & 16 ||
-                            symbolFlags & 8192 ||
-                            symbolFlags & 16384 ||
-                            symbolFlags & 131072 ||
-                            symbolFlags & 98304 ||
-                            symbolKind === ScriptElementKind.memberFunctionElement) {
-                            var allSignatures = type.getNonNullableType().getCallSignatures();
-                            addSignatureDisplayParts(allSignatures[0], allSignatures);
-                        }
-                    }
-                }
-                else {
-                    symbolKind = getSymbolKind(symbol, location);
-                }
-            }
-            if (!documentation) {
-                documentation = symbol.getDocumentationComment();
-            }
-            return { displayParts: displayParts, documentation: documentation, symbolKind: symbolKind };
-            function addNewLineIfDisplayPartsExist() {
-                if (displayParts.length) {
-                    displayParts.push(ts.lineBreakPart());
-                }
-            }
-            function addFullSymbolName(symbol, enclosingDeclaration) {
-                var fullSymbolDisplayParts = ts.symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration || sourceFile, undefined, 1 | 2);
-                ts.addRange(displayParts, fullSymbolDisplayParts);
-            }
-            function addPrefixForAnyFunctionOrVar(symbol, symbolKind) {
-                addNewLineIfDisplayPartsExist();
-                if (symbolKind) {
-                    pushTypePart(symbolKind);
-                    displayParts.push(ts.spacePart());
-                    addFullSymbolName(symbol);
-                }
-            }
-            function pushTypePart(symbolKind) {
-                switch (symbolKind) {
-                    case ScriptElementKind.variableElement:
-                    case ScriptElementKind.functionElement:
-                    case ScriptElementKind.letElement:
-                    case ScriptElementKind.constElement:
-                    case ScriptElementKind.constructorImplementationElement:
-                        displayParts.push(ts.textOrKeywordPart(symbolKind));
-                        return;
-                    default:
-                        displayParts.push(ts.punctuationPart(17));
-                        displayParts.push(ts.textOrKeywordPart(symbolKind));
-                        displayParts.push(ts.punctuationPart(18));
-                        return;
-                }
-            }
-            function addSignatureDisplayParts(signature, allSignatures, flags) {
-                ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, enclosingDeclaration, flags | 32));
-                if (allSignatures.length > 1) {
-                    displayParts.push(ts.spacePart());
-                    displayParts.push(ts.punctuationPart(17));
-                    displayParts.push(ts.operatorPart(35));
-                    displayParts.push(ts.displayPart((allSignatures.length - 1).toString(), SymbolDisplayPartKind.numericLiteral));
-                    displayParts.push(ts.spacePart());
-                    displayParts.push(ts.textPart(allSignatures.length === 2 ? "overload" : "overloads"));
-                    displayParts.push(ts.punctuationPart(18));
-                }
-                documentation = signature.getDocumentationComment();
-            }
-            function writeTypeParametersOfSymbol(symbol, enclosingDeclaration) {
-                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
-                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration);
-                });
-                ts.addRange(displayParts, typeParameterParts);
-            }
-        }
-        function getQuickInfoAtPosition(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            if (isLabelName(node)) {
-                return undefined;
-            }
-            var typeChecker = program.getTypeChecker();
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol || typeChecker.isUnknownSymbol(symbol)) {
-                switch (node.kind) {
-                    case 69:
-                    case 172:
-                    case 139:
-                    case 97:
-                    case 165:
-                    case 95:
-                        var type = typeChecker.getTypeAtLocation(node);
-                        if (type) {
-                            return {
-                                kind: ScriptElementKind.unknown,
-                                kindModifiers: ScriptElementKindModifier.none,
-                                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
-                                displayParts: ts.typeToDisplayParts(typeChecker, type, getContainerNode(node)),
-                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined
-                            };
-                        }
-                }
-                return undefined;
-            }
-            var displayPartsDocumentationsAndKind = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, getContainerNode(node), node);
-            return {
-                kind: displayPartsDocumentationsAndKind.symbolKind,
-                kindModifiers: getSymbolModifiers(symbol),
-                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
-                displayParts: displayPartsDocumentationsAndKind.displayParts,
-                documentation: displayPartsDocumentationsAndKind.documentation
-            };
-        }
-        function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
-            return {
-                fileName: node.getSourceFile().fileName,
-                textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
-                kind: symbolKind,
-                name: symbolName,
-                containerKind: undefined,
-                containerName: containerName
-            };
-        }
-        function getDefinitionFromSymbol(symbol, node) {
-            var typeChecker = program.getTypeChecker();
-            var result = [];
-            var declarations = symbol.getDeclarations();
-            var symbolName = typeChecker.symbolToString(symbol);
-            var symbolKind = getSymbolKind(symbol, node);
-            var containerSymbol = symbol.parent;
-            var containerName = containerSymbol ? typeChecker.symbolToString(containerSymbol, node) : "";
-            if (!tryAddConstructSignature(symbol, node, symbolKind, symbolName, containerName, result) &&
-                !tryAddCallSignature(symbol, node, symbolKind, symbolName, containerName, result)) {
-                ts.forEach(declarations, function (declaration) {
-                    result.push(createDefinitionInfo(declaration, symbolKind, symbolName, containerName));
-                });
-            }
-            return result;
-            function tryAddConstructSignature(symbol, location, symbolKind, symbolName, containerName, result) {
-                if (isNewExpressionTarget(location) || location.kind === 121) {
-                    if (symbol.flags & 32) {
-                        for (var _i = 0, _a = symbol.getDeclarations(); _i < _a.length; _i++) {
-                            var declaration = _a[_i];
-                            if (ts.isClassLike(declaration)) {
-                                return tryAddSignature(declaration.members, true, symbolKind, symbolName, containerName, result);
-                            }
-                        }
-                        ts.Debug.fail("Expected declaration to have at least one class-like declaration");
-                    }
-                }
-                return false;
-            }
-            function tryAddCallSignature(symbol, location, symbolKind, symbolName, containerName, result) {
-                if (isCallExpressionTarget(location) || isNewExpressionTarget(location) || isNameOfFunctionDeclaration(location)) {
-                    return tryAddSignature(symbol.declarations, false, symbolKind, symbolName, containerName, result);
-                }
-                return false;
-            }
-            function tryAddSignature(signatureDeclarations, selectConstructors, symbolKind, symbolName, containerName, result) {
-                var declarations = [];
-                var definition;
-                ts.forEach(signatureDeclarations, function (d) {
-                    if ((selectConstructors && d.kind === 148) ||
-                        (!selectConstructors && (d.kind === 220 || d.kind === 147 || d.kind === 146))) {
-                        declarations.push(d);
-                        if (d.body)
-                            definition = d;
-                    }
-                });
-                if (definition) {
-                    result.push(createDefinitionInfo(definition, symbolKind, symbolName, containerName));
-                    return true;
-                }
-                else if (declarations.length) {
-                    result.push(createDefinitionInfo(ts.lastOrUndefined(declarations), symbolKind, symbolName, containerName));
-                    return true;
-                }
-                return false;
-            }
-        }
-        function findReferenceInPosition(refs, pos) {
-            for (var _i = 0, refs_1 = refs; _i < refs_1.length; _i++) {
-                var ref = refs_1[_i];
-                if (ref.pos <= pos && pos < ref.end) {
-                    return ref;
-                }
-            }
-            return undefined;
-        }
-        function getDefinitionInfoForFileReference(name, targetFileName) {
-            return {
-                fileName: targetFileName,
-                textSpan: ts.createTextSpanFromBounds(0, 0),
-                kind: ScriptElementKind.scriptElement,
-                name: name,
-                containerName: undefined,
-                containerKind: undefined
-            };
-        }
-        function getDefinitionAtPosition(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var comment = findReferenceInPosition(sourceFile.referencedFiles, position);
-            if (comment) {
-                var referenceFile = ts.tryResolveScriptReference(program, sourceFile, comment);
-                if (referenceFile) {
-                    return [getDefinitionInfoForFileReference(comment.fileName, referenceFile.fileName)];
-                }
-                return undefined;
-            }
-            var typeReferenceDirective = findReferenceInPosition(sourceFile.typeReferenceDirectives, position);
-            if (typeReferenceDirective) {
-                var referenceFile = ts.lookUp(program.getResolvedTypeReferenceDirectives(), typeReferenceDirective.fileName);
-                if (referenceFile && referenceFile.resolvedFileName) {
-                    return [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
-                }
-                return undefined;
-            }
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            if (isJumpStatementTarget(node)) {
-                var labelName = node.text;
-                var label = getTargetLabel(node.parent, node.text);
-                return label ? [createDefinitionInfo(label, ScriptElementKind.label, labelName, undefined)] : undefined;
-            }
-            var typeChecker = program.getTypeChecker();
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol) {
-                return undefined;
-            }
-            if (symbol.flags & 8388608) {
-                var declaration = symbol.declarations[0];
-                if (node.kind === 69 &&
-                    (node.parent === declaration ||
-                        (declaration.kind === 234 && declaration.parent && declaration.parent.kind === 233))) {
-                    symbol = typeChecker.getAliasedSymbol(symbol);
-                }
-            }
-            if (node.parent.kind === 254) {
-                var shorthandSymbol = typeChecker.getShorthandAssignmentValueSymbol(symbol.valueDeclaration);
-                if (!shorthandSymbol) {
-                    return [];
-                }
-                var shorthandDeclarations = shorthandSymbol.getDeclarations();
-                var shorthandSymbolKind_1 = getSymbolKind(shorthandSymbol, node);
-                var shorthandSymbolName_1 = typeChecker.symbolToString(shorthandSymbol);
-                var shorthandContainerName_1 = typeChecker.symbolToString(symbol.parent, node);
-                return ts.map(shorthandDeclarations, function (declaration) { return createDefinitionInfo(declaration, shorthandSymbolKind_1, shorthandSymbolName_1, shorthandContainerName_1); });
-            }
-            return getDefinitionFromSymbol(symbol, node);
-        }
-        function getTypeDefinitionAtPosition(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            var typeChecker = program.getTypeChecker();
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol) {
-                return undefined;
-            }
-            var type = typeChecker.getTypeOfSymbolAtLocation(symbol, node);
-            if (!type) {
-                return undefined;
-            }
-            if (type.flags & 16384) {
-                var result_3 = [];
-                ts.forEach(type.types, function (t) {
-                    if (t.symbol) {
-                        ts.addRange(result_3, getDefinitionFromSymbol(t.symbol, node));
-                    }
-                });
-                return result_3;
-            }
-            if (!type.symbol) {
-                return undefined;
-            }
-            return getDefinitionFromSymbol(type.symbol, node);
-        }
-        function getOccurrencesAtPosition(fileName, position) {
-            var results = getOccurrencesAtPositionCore(fileName, position);
-            if (results) {
-                var sourceFile_2 = getCanonicalFileName(ts.normalizeSlashes(fileName));
-                results = ts.filter(results, function (r) { return getCanonicalFileName(ts.normalizeSlashes(r.fileName)) === sourceFile_2; });
-            }
-            return results;
-        }
-        function getDocumentHighlights(fileName, position, filesToSearch) {
-            synchronizeHostData();
-            var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingWord(sourceFile, position);
-            if (!node) {
-                return undefined;
-            }
-            return getSemanticDocumentHighlights(node) || getSyntacticDocumentHighlights(node);
-            function getHighlightSpanForNode(node) {
-                var start = node.getStart();
-                var end = node.getEnd();
-                return {
-                    fileName: sourceFile.fileName,
-                    textSpan: ts.createTextSpanFromBounds(start, end),
-                    kind: HighlightSpanKind.none
-                };
-            }
-            function getSemanticDocumentHighlights(node) {
-                if (node.kind === 69 ||
-                    node.kind === 97 ||
-                    node.kind === 165 ||
-                    node.kind === 95 ||
-                    node.kind === 9 ||
-                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                    var referencedSymbols = getReferencedSymbolsForNode(node, sourceFilesToSearch, false, false);
-                    return convertReferencedSymbols(referencedSymbols);
-                }
-                return undefined;
-                function convertReferencedSymbols(referencedSymbols) {
-                    if (!referencedSymbols) {
-                        return undefined;
-                    }
-                    var fileNameToDocumentHighlights = {};
-                    var result = [];
-                    for (var _i = 0, referencedSymbols_1 = referencedSymbols; _i < referencedSymbols_1.length; _i++) {
-                        var referencedSymbol = referencedSymbols_1[_i];
-                        for (var _a = 0, _b = referencedSymbol.references; _a < _b.length; _a++) {
-                            var referenceEntry = _b[_a];
-                            var fileName_1 = referenceEntry.fileName;
-                            var documentHighlights = ts.getProperty(fileNameToDocumentHighlights, fileName_1);
-                            if (!documentHighlights) {
-                                documentHighlights = { fileName: fileName_1, highlightSpans: [] };
-                                fileNameToDocumentHighlights[fileName_1] = documentHighlights;
-                                result.push(documentHighlights);
-                            }
-                            documentHighlights.highlightSpans.push({
-                                textSpan: referenceEntry.textSpan,
-                                kind: referenceEntry.isWriteAccess ? HighlightSpanKind.writtenReference : HighlightSpanKind.reference
-                            });
-                        }
-                    }
-                    return result;
-                }
-            }
-            function getSyntacticDocumentHighlights(node) {
-                var fileName = sourceFile.fileName;
-                var highlightSpans = getHighlightSpans(node);
-                if (!highlightSpans || highlightSpans.length === 0) {
-                    return undefined;
-                }
-                return [{ fileName: fileName, highlightSpans: highlightSpans }];
-                function hasKind(node, kind) {
-                    return node !== undefined && node.kind === kind;
-                }
-                function parent(node) {
-                    return node && node.parent;
-                }
-                function getHighlightSpans(node) {
-                    if (node) {
-                        switch (node.kind) {
-                            case 88:
-                            case 80:
-                                if (hasKind(node.parent, 203)) {
-                                    return getIfElseOccurrences(node.parent);
-                                }
-                                break;
-                            case 94:
-                                if (hasKind(node.parent, 211)) {
-                                    return getReturnOccurrences(node.parent);
-                                }
-                                break;
-                            case 98:
-                                if (hasKind(node.parent, 215)) {
-                                    return getThrowOccurrences(node.parent);
-                                }
-                                break;
-                            case 72:
-                                if (hasKind(parent(parent(node)), 216)) {
-                                    return getTryCatchFinallyOccurrences(node.parent.parent);
-                                }
-                                break;
-                            case 100:
-                            case 85:
-                                if (hasKind(parent(node), 216)) {
-                                    return getTryCatchFinallyOccurrences(node.parent);
-                                }
-                                break;
-                            case 96:
-                                if (hasKind(node.parent, 213)) {
-                                    return getSwitchCaseDefaultOccurrences(node.parent);
-                                }
-                                break;
-                            case 71:
-                            case 77:
-                                if (hasKind(parent(parent(parent(node))), 213)) {
-                                    return getSwitchCaseDefaultOccurrences(node.parent.parent.parent);
-                                }
-                                break;
-                            case 70:
-                            case 75:
-                                if (hasKind(node.parent, 210) || hasKind(node.parent, 209)) {
-                                    return getBreakOrContinueStatementOccurrences(node.parent);
-                                }
-                                break;
-                            case 86:
-                                if (hasKind(node.parent, 206) ||
-                                    hasKind(node.parent, 207) ||
-                                    hasKind(node.parent, 208)) {
-                                    return getLoopBreakContinueOccurrences(node.parent);
-                                }
-                                break;
-                            case 104:
-                            case 79:
-                                if (hasKind(node.parent, 205) || hasKind(node.parent, 204)) {
-                                    return getLoopBreakContinueOccurrences(node.parent);
-                                }
-                                break;
-                            case 121:
-                                if (hasKind(node.parent, 148)) {
-                                    return getConstructorOccurrences(node.parent);
-                                }
-                                break;
-                            case 123:
-                            case 131:
-                                if (hasKind(node.parent, 149) || hasKind(node.parent, 150)) {
-                                    return getGetAndSetOccurrences(node.parent);
-                                }
-                                break;
-                            default:
-                                if (ts.isModifierKind(node.kind) && node.parent &&
-                                    (ts.isDeclaration(node.parent) || node.parent.kind === 200)) {
-                                    return getModifierOccurrences(node.kind, node.parent);
-                                }
-                        }
-                    }
-                    return undefined;
-                }
-                function aggregateOwnedThrowStatements(node) {
-                    var statementAccumulator = [];
-                    aggregate(node);
-                    return statementAccumulator;
-                    function aggregate(node) {
-                        if (node.kind === 215) {
-                            statementAccumulator.push(node);
-                        }
-                        else if (node.kind === 216) {
-                            var tryStatement = node;
-                            if (tryStatement.catchClause) {
-                                aggregate(tryStatement.catchClause);
-                            }
-                            else {
-                                aggregate(tryStatement.tryBlock);
-                            }
-                            if (tryStatement.finallyBlock) {
-                                aggregate(tryStatement.finallyBlock);
-                            }
-                        }
-                        else if (!ts.isFunctionLike(node)) {
-                            ts.forEachChild(node, aggregate);
-                        }
-                    }
-                }
-                function getThrowStatementOwner(throwStatement) {
-                    var child = throwStatement;
-                    while (child.parent) {
-                        var parent_19 = child.parent;
-                        if (ts.isFunctionBlock(parent_19) || parent_19.kind === 256) {
-                            return parent_19;
-                        }
-                        if (parent_19.kind === 216) {
-                            var tryStatement = parent_19;
-                            if (tryStatement.tryBlock === child && tryStatement.catchClause) {
-                                return child;
-                            }
-                        }
-                        child = parent_19;
-                    }
-                    return undefined;
-                }
-                function aggregateAllBreakAndContinueStatements(node) {
-                    var statementAccumulator = [];
-                    aggregate(node);
-                    return statementAccumulator;
-                    function aggregate(node) {
-                        if (node.kind === 210 || node.kind === 209) {
-                            statementAccumulator.push(node);
-                        }
-                        else if (!ts.isFunctionLike(node)) {
-                            ts.forEachChild(node, aggregate);
-                        }
-                    }
-                }
-                function ownsBreakOrContinueStatement(owner, statement) {
-                    var actualOwner = getBreakOrContinueOwner(statement);
-                    return actualOwner && actualOwner === owner;
-                }
-                function getBreakOrContinueOwner(statement) {
-                    for (var node_1 = statement.parent; node_1; node_1 = node_1.parent) {
-                        switch (node_1.kind) {
-                            case 213:
-                                if (statement.kind === 209) {
-                                    continue;
-                                }
-                            case 206:
-                            case 207:
-                            case 208:
-                            case 205:
-                            case 204:
-                                if (!statement.label || isLabeledBy(node_1, statement.label.text)) {
-                                    return node_1;
-                                }
-                                break;
-                            default:
-                                if (ts.isFunctionLike(node_1)) {
-                                    return undefined;
-                                }
-                                break;
-                        }
-                    }
-                    return undefined;
-                }
-                function getModifierOccurrences(modifier, declaration) {
-                    var container = declaration.parent;
-                    if (ts.isAccessibilityModifier(modifier)) {
-                        if (!(container.kind === 221 ||
-                            container.kind === 192 ||
-                            (declaration.kind === 142 && hasKind(container, 148)))) {
-                            return undefined;
-                        }
-                    }
-                    else if (modifier === 113) {
-                        if (!(container.kind === 221 || container.kind === 192)) {
-                            return undefined;
-                        }
-                    }
-                    else if (modifier === 82 || modifier === 122) {
-                        if (!(container.kind === 226 || container.kind === 256)) {
-                            return undefined;
-                        }
-                    }
-                    else if (modifier === 115) {
-                        if (!(container.kind === 221 || declaration.kind === 221)) {
-                            return undefined;
-                        }
-                    }
-                    else {
-                        return undefined;
-                    }
-                    var keywords = [];
-                    var modifierFlag = getFlagFromModifier(modifier);
-                    var nodes;
-                    switch (container.kind) {
-                        case 226:
-                        case 256:
-                            if (modifierFlag & 128) {
-                                nodes = declaration.members.concat(declaration);
-                            }
-                            else {
-                                nodes = container.statements;
-                            }
-                            break;
-                        case 148:
-                            nodes = container.parameters.concat(container.parent.members);
-                            break;
-                        case 221:
-                        case 192:
-                            nodes = container.members;
-                            if (modifierFlag & 28) {
-                                var constructor = ts.forEach(container.members, function (member) {
-                                    return member.kind === 148 && member;
-                                });
-                                if (constructor) {
-                                    nodes = nodes.concat(constructor.parameters);
-                                }
-                            }
-                            else if (modifierFlag & 128) {
-                                nodes = nodes.concat(container);
-                            }
-                            break;
-                        default:
-                            ts.Debug.fail("Invalid container kind.");
-                    }
-                    ts.forEach(nodes, function (node) {
-                        if (node.modifiers && node.flags & modifierFlag) {
-                            ts.forEach(node.modifiers, function (child) { return pushKeywordIf(keywords, child, modifier); });
-                        }
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                    function getFlagFromModifier(modifier) {
-                        switch (modifier) {
-                            case 112:
-                                return 4;
-                            case 110:
-                                return 8;
-                            case 111:
-                                return 16;
-                            case 113:
-                                return 32;
-                            case 82:
-                                return 1;
-                            case 122:
-                                return 2;
-                            case 115:
-                                return 128;
-                            default:
-                                ts.Debug.fail();
-                        }
-                    }
-                }
-                function pushKeywordIf(keywordList, token) {
-                    var expected = [];
-                    for (var _i = 2; _i < arguments.length; _i++) {
-                        expected[_i - 2] = arguments[_i];
-                    }
-                    if (token && ts.contains(expected, token.kind)) {
-                        keywordList.push(token);
-                        return true;
-                    }
-                    return false;
-                }
-                function getGetAndSetOccurrences(accessorDeclaration) {
-                    var keywords = [];
-                    tryPushAccessorKeyword(accessorDeclaration.symbol, 149);
-                    tryPushAccessorKeyword(accessorDeclaration.symbol, 150);
-                    return ts.map(keywords, getHighlightSpanForNode);
-                    function tryPushAccessorKeyword(accessorSymbol, accessorKind) {
-                        var accessor = ts.getDeclarationOfKind(accessorSymbol, accessorKind);
-                        if (accessor) {
-                            ts.forEach(accessor.getChildren(), function (child) { return pushKeywordIf(keywords, child, 123, 131); });
-                        }
-                    }
-                }
-                function getConstructorOccurrences(constructorDeclaration) {
-                    var declarations = constructorDeclaration.symbol.getDeclarations();
-                    var keywords = [];
-                    ts.forEach(declarations, function (declaration) {
-                        ts.forEach(declaration.getChildren(), function (token) {
-                            return pushKeywordIf(keywords, token, 121);
-                        });
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getLoopBreakContinueOccurrences(loopNode) {
-                    var keywords = [];
-                    if (pushKeywordIf(keywords, loopNode.getFirstToken(), 86, 104, 79)) {
-                        if (loopNode.kind === 204) {
-                            var loopTokens = loopNode.getChildren();
-                            for (var i = loopTokens.length - 1; i >= 0; i--) {
-                                if (pushKeywordIf(keywords, loopTokens[i], 104)) {
-                                    break;
-                                }
-                            }
-                        }
-                    }
-                    var breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
-                    ts.forEach(breaksAndContinues, function (statement) {
-                        if (ownsBreakOrContinueStatement(loopNode, statement)) {
-                            pushKeywordIf(keywords, statement.getFirstToken(), 70, 75);
-                        }
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getBreakOrContinueStatementOccurrences(breakOrContinueStatement) {
-                    var owner = getBreakOrContinueOwner(breakOrContinueStatement);
-                    if (owner) {
-                        switch (owner.kind) {
-                            case 206:
-                            case 207:
-                            case 208:
-                            case 204:
-                            case 205:
-                                return getLoopBreakContinueOccurrences(owner);
-                            case 213:
-                                return getSwitchCaseDefaultOccurrences(owner);
-                        }
-                    }
-                    return undefined;
-                }
-                function getSwitchCaseDefaultOccurrences(switchStatement) {
-                    var keywords = [];
-                    pushKeywordIf(keywords, switchStatement.getFirstToken(), 96);
-                    ts.forEach(switchStatement.caseBlock.clauses, function (clause) {
-                        pushKeywordIf(keywords, clause.getFirstToken(), 71, 77);
-                        var breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
-                        ts.forEach(breaksAndContinues, function (statement) {
-                            if (ownsBreakOrContinueStatement(switchStatement, statement)) {
-                                pushKeywordIf(keywords, statement.getFirstToken(), 70);
-                            }
-                        });
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getTryCatchFinallyOccurrences(tryStatement) {
-                    var keywords = [];
-                    pushKeywordIf(keywords, tryStatement.getFirstToken(), 100);
-                    if (tryStatement.catchClause) {
-                        pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), 72);
-                    }
-                    if (tryStatement.finallyBlock) {
-                        var finallyKeyword = ts.findChildOfKind(tryStatement, 85, sourceFile);
-                        pushKeywordIf(keywords, finallyKeyword, 85);
-                    }
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getThrowOccurrences(throwStatement) {
-                    var owner = getThrowStatementOwner(throwStatement);
-                    if (!owner) {
-                        return undefined;
-                    }
-                    var keywords = [];
-                    ts.forEach(aggregateOwnedThrowStatements(owner), function (throwStatement) {
-                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98);
-                    });
-                    if (ts.isFunctionBlock(owner)) {
-                        ts.forEachReturnStatement(owner, function (returnStatement) {
-                            pushKeywordIf(keywords, returnStatement.getFirstToken(), 94);
-                        });
-                    }
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getReturnOccurrences(returnStatement) {
-                    var func = ts.getContainingFunction(returnStatement);
-                    if (!(func && hasKind(func.body, 199))) {
-                        return undefined;
-                    }
-                    var keywords = [];
-                    ts.forEachReturnStatement(func.body, function (returnStatement) {
-                        pushKeywordIf(keywords, returnStatement.getFirstToken(), 94);
-                    });
-                    ts.forEach(aggregateOwnedThrowStatements(func.body), function (throwStatement) {
-                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98);
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getIfElseOccurrences(ifStatement) {
-                    var keywords = [];
-                    while (hasKind(ifStatement.parent, 203) && ifStatement.parent.elseStatement === ifStatement) {
-                        ifStatement = ifStatement.parent;
-                    }
-                    while (ifStatement) {
-                        var children = ifStatement.getChildren();
-                        pushKeywordIf(keywords, children[0], 88);
-                        for (var i = children.length - 1; i >= 0; i--) {
-                            if (pushKeywordIf(keywords, children[i], 80)) {
-                                break;
-                            }
-                        }
-                        if (!hasKind(ifStatement.elseStatement, 203)) {
-                            break;
-                        }
-                        ifStatement = ifStatement.elseStatement;
-                    }
-                    var result = [];
-                    for (var i = 0; i < keywords.length; i++) {
-                        if (keywords[i].kind === 80 && i < keywords.length - 1) {
-                            var elseKeyword = keywords[i];
-                            var ifKeyword = keywords[i + 1];
-                            var shouldCombindElseAndIf = true;
-                            for (var j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
-                                if (!ts.isWhiteSpace(sourceFile.text.charCodeAt(j))) {
-                                    shouldCombindElseAndIf = false;
-                                    break;
-                                }
-                            }
-                            if (shouldCombindElseAndIf) {
-                                result.push({
-                                    fileName: fileName,
-                                    textSpan: ts.createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
-                                    kind: HighlightSpanKind.reference
-                                });
-                                i++;
-                                continue;
-                            }
-                        }
-                        result.push(getHighlightSpanForNode(keywords[i]));
-                    }
-                    return result;
-                }
-            }
-        }
-        function getOccurrencesAtPositionCore(fileName, position) {
-            synchronizeHostData();
-            return convertDocumentHighlights(getDocumentHighlights(fileName, position, [fileName]));
-            function convertDocumentHighlights(documentHighlights) {
-                if (!documentHighlights) {
-                    return undefined;
-                }
-                var result = [];
-                for (var _i = 0, documentHighlights_1 = documentHighlights; _i < documentHighlights_1.length; _i++) {
-                    var entry = documentHighlights_1[_i];
-                    for (var _a = 0, _b = entry.highlightSpans; _a < _b.length; _a++) {
-                        var highlightSpan = _b[_a];
-                        result.push({
-                            fileName: entry.fileName,
-                            textSpan: highlightSpan.textSpan,
-                            isWriteAccess: highlightSpan.kind === HighlightSpanKind.writtenReference
-                        });
-                    }
-                }
-                return result;
-            }
-        }
-        function convertReferences(referenceSymbols) {
-            if (!referenceSymbols) {
-                return undefined;
-            }
-            var referenceEntries = [];
-            for (var _i = 0, referenceSymbols_1 = referenceSymbols; _i < referenceSymbols_1.length; _i++) {
-                var referenceSymbol = referenceSymbols_1[_i];
-                ts.addRange(referenceEntries, referenceSymbol.references);
-            }
-            return referenceEntries;
-        }
-        function findRenameLocations(fileName, position, findInStrings, findInComments) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, findInStrings, findInComments);
-            return convertReferences(referencedSymbols);
-        }
-        function getReferencesAtPosition(fileName, position) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, false, false);
-            return convertReferences(referencedSymbols);
-        }
-        function findReferences(fileName, position) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, false, false);
-            return ts.filter(referencedSymbols, function (rs) { return !!rs.definition; });
-        }
-        function findReferencedSymbols(fileName, position, findInStrings, findInComments) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            if (node.kind !== 69 &&
-                node.kind !== 9 &&
-                !isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                return undefined;
-            }
-            ts.Debug.assert(node.kind === 69 || node.kind === 8 || node.kind === 9);
-            return getReferencedSymbolsForNode(node, program.getSourceFiles(), findInStrings, findInComments);
-        }
-        function getReferencedSymbolsForNode(node, sourceFiles, findInStrings, findInComments) {
-            var typeChecker = program.getTypeChecker();
-            if (isLabelName(node)) {
-                if (isJumpStatementTarget(node)) {
-                    var labelDefinition = getTargetLabel(node.parent, node.text);
-                    return labelDefinition ? getLabelReferencesInNode(labelDefinition.parent, labelDefinition) : undefined;
-                }
-                else {
-                    return getLabelReferencesInNode(node.parent, node);
-                }
-            }
-            if (node.kind === 97 || node.kind === 165) {
-                return getReferencesForThisKeyword(node, sourceFiles);
-            }
-            if (node.kind === 95) {
-                return getReferencesForSuperKeyword(node);
-            }
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol && node.kind === 9) {
-                return getReferencesForStringLiteral(node, sourceFiles);
-            }
-            if (!symbol) {
-                return undefined;
-            }
-            var declarations = symbol.declarations;
-            if (!declarations || !declarations.length) {
-                return undefined;
-            }
-            var result;
-            var searchMeaning = getIntersectingMeaningFromDeclarations(getMeaningFromLocation(node), declarations);
-            var declaredName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
-            var scope = getSymbolScope(symbol);
-            var symbolToIndex = [];
-            if (scope) {
-                result = [];
-                getReferencesInNode(scope, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
-            }
-            else {
-                var internedName = getInternedName(symbol, node, declarations);
-                for (var _i = 0, sourceFiles_4 = sourceFiles; _i < sourceFiles_4.length; _i++) {
-                    var sourceFile = sourceFiles_4[_i];
-                    cancellationToken.throwIfCancellationRequested();
-                    var nameTable = getNameTable(sourceFile);
-                    if (ts.lookUp(nameTable, internedName) !== undefined) {
-                        result = result || [];
-                        getReferencesInNode(sourceFile, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
-                    }
-                }
-            }
-            return result;
-            function getDefinition(symbol) {
-                var info = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, node.getSourceFile(), getContainerNode(node), node);
-                var name = ts.map(info.displayParts, function (p) { return p.text; }).join("");
-                var declarations = symbol.declarations;
-                if (!declarations || declarations.length === 0) {
-                    return undefined;
-                }
-                return {
-                    containerKind: "",
-                    containerName: "",
-                    name: name,
-                    kind: info.symbolKind,
-                    fileName: declarations[0].getSourceFile().fileName,
-                    textSpan: ts.createTextSpan(declarations[0].getStart(), 0)
-                };
-            }
-            function getAliasSymbolForPropertyNameSymbol(symbol, location) {
-                if (symbol.flags & 8388608) {
-                    var defaultImport = ts.getDeclarationOfKind(symbol, 231);
-                    if (defaultImport) {
-                        return typeChecker.getAliasedSymbol(symbol);
-                    }
-                    var importOrExportSpecifier = ts.forEach(symbol.declarations, function (declaration) { return (declaration.kind === 234 ||
-                        declaration.kind === 238) ? declaration : undefined; });
-                    if (importOrExportSpecifier &&
-                        (!importOrExportSpecifier.propertyName ||
-                            importOrExportSpecifier.propertyName === location)) {
-                        return importOrExportSpecifier.kind === 234 ?
-                            typeChecker.getAliasedSymbol(symbol) :
-                            typeChecker.getExportSpecifierLocalTargetSymbol(importOrExportSpecifier);
-                    }
-                }
-                return undefined;
-            }
-            function getPropertySymbolOfDestructuringAssignment(location) {
-                return ts.isArrayLiteralOrObjectLiteralDestructuringPattern(location.parent.parent) &&
-                    typeChecker.getPropertySymbolOfDestructuringAssignment(location);
-            }
-            function isObjectBindingPatternElementWithoutPropertyName(symbol) {
-                var bindingElement = ts.getDeclarationOfKind(symbol, 169);
-                return bindingElement &&
-                    bindingElement.parent.kind === 167 &&
-                    !bindingElement.propertyName;
-            }
-            function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol) {
-                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
-                    var bindingElement = ts.getDeclarationOfKind(symbol, 169);
-                    var typeOfPattern = typeChecker.getTypeAtLocation(bindingElement.parent);
-                    return typeOfPattern && typeChecker.getPropertyOfType(typeOfPattern, bindingElement.name.text);
-                }
-                return undefined;
-            }
-            function getInternedName(symbol, location, declarations) {
-                if (ts.isImportOrExportSpecifierName(location)) {
-                    return location.getText();
-                }
-                var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
-                symbol = localExportDefaultSymbol || symbol;
-                return ts.stripQuotes(symbol.name);
-            }
-            function getSymbolScope(symbol) {
-                var valueDeclaration = symbol.valueDeclaration;
-                if (valueDeclaration && (valueDeclaration.kind === 179 || valueDeclaration.kind === 192)) {
-                    return valueDeclaration;
-                }
-                if (symbol.flags & (4 | 8192)) {
-                    var privateDeclaration = ts.forEach(symbol.getDeclarations(), function (d) { return (d.flags & 8) ? d : undefined; });
-                    if (privateDeclaration) {
-                        return ts.getAncestor(privateDeclaration, 221);
-                    }
-                }
-                if (symbol.flags & 8388608) {
-                    return undefined;
-                }
-                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
-                    return undefined;
-                }
-                if (symbol.parent || (symbol.flags & 268435456)) {
-                    return undefined;
-                }
-                var scope;
-                var declarations = symbol.getDeclarations();
-                if (declarations) {
-                    for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
-                        var declaration = declarations_9[_i];
-                        var container = getContainerNode(declaration);
-                        if (!container) {
-                            return undefined;
-                        }
-                        if (scope && scope !== container) {
-                            return undefined;
-                        }
-                        if (container.kind === 256 && !ts.isExternalModule(container)) {
-                            return undefined;
-                        }
-                        scope = container;
-                    }
-                }
-                return scope;
-            }
-            function getPossibleSymbolReferencePositions(sourceFile, symbolName, start, end) {
-                var positions = [];
-                if (!symbolName || !symbolName.length) {
-                    return positions;
-                }
-                var text = sourceFile.text;
-                var sourceLength = text.length;
-                var symbolNameLength = symbolName.length;
-                var position = text.indexOf(symbolName, start);
-                while (position >= 0) {
-                    cancellationToken.throwIfCancellationRequested();
-                    if (position > end)
-                        break;
-                    var endPosition = position + symbolNameLength;
-                    if ((position === 0 || !ts.isIdentifierPart(text.charCodeAt(position - 1), 2)) &&
-                        (endPosition === sourceLength || !ts.isIdentifierPart(text.charCodeAt(endPosition), 2))) {
-                        positions.push(position);
-                    }
-                    position = text.indexOf(symbolName, position + symbolNameLength + 1);
-                }
-                return positions;
-            }
-            function getLabelReferencesInNode(container, targetLabel) {
-                var references = [];
-                var sourceFile = container.getSourceFile();
-                var labelName = targetLabel.text;
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container.getStart(), container.getEnd());
-                ts.forEach(possiblePositions, function (position) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var node = ts.getTouchingWord(sourceFile, position);
-                    if (!node || node.getWidth() !== labelName.length) {
-                        return;
-                    }
-                    if (node === targetLabel ||
-                        (isJumpStatementTarget(node) && getTargetLabel(node, labelName) === targetLabel)) {
-                        references.push(getReferenceEntryFromNode(node));
-                    }
-                });
-                var definition = {
-                    containerKind: "",
-                    containerName: "",
-                    fileName: targetLabel.getSourceFile().fileName,
-                    kind: ScriptElementKind.label,
-                    name: labelName,
-                    textSpan: ts.createTextSpanFromBounds(targetLabel.getStart(), targetLabel.getEnd())
-                };
-                return [{ definition: definition, references: references }];
-            }
-            function isValidReferencePosition(node, searchSymbolName) {
-                if (node) {
-                    switch (node.kind) {
-                        case 69:
-                            return node.getWidth() === searchSymbolName.length;
-                        case 9:
-                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
-                                isNameOfExternalModuleImportOrDeclaration(node)) {
-                                return node.getWidth() === searchSymbolName.length + 2;
-                            }
-                            break;
-                        case 8:
-                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                                return node.getWidth() === searchSymbolName.length;
-                            }
-                            break;
-                    }
-                }
-                return false;
-            }
-            function getReferencesInNode(container, searchSymbol, searchText, searchLocation, searchMeaning, findInStrings, findInComments, result, symbolToIndex) {
-                var sourceFile = container.getSourceFile();
-                var tripleSlashDirectivePrefixRegex = /^\/\/\/\s*</;
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, container.getStart(), container.getEnd());
-                if (possiblePositions.length) {
-                    var searchSymbols_1 = populateSearchSymbolSet(searchSymbol, searchLocation);
-                    ts.forEach(possiblePositions, function (position) {
-                        cancellationToken.throwIfCancellationRequested();
-                        var referenceLocation = ts.getTouchingPropertyName(sourceFile, position);
-                        if (!isValidReferencePosition(referenceLocation, searchText)) {
-                            if ((findInStrings && ts.isInString(sourceFile, position)) ||
-                                (findInComments && isInNonReferenceComment(sourceFile, position))) {
-                                result.push({
-                                    definition: undefined,
-                                    references: [{
-                                            fileName: sourceFile.fileName,
-                                            textSpan: ts.createTextSpan(position, searchText.length),
-                                            isWriteAccess: false
-                                        }]
-                                });
-                            }
-                            return;
-                        }
-                        if (!(getMeaningFromLocation(referenceLocation) & searchMeaning)) {
-                            return;
-                        }
-                        var referenceSymbol = typeChecker.getSymbolAtLocation(referenceLocation);
-                        if (referenceSymbol) {
-                            var referenceSymbolDeclaration = referenceSymbol.valueDeclaration;
-                            var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(referenceSymbolDeclaration);
-                            var relatedSymbol = getRelatedSymbol(searchSymbols_1, referenceSymbol, referenceLocation);
-                            if (relatedSymbol) {
-                                var referencedSymbol = getReferencedSymbol(relatedSymbol);
-                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceLocation));
-                            }
-                            else if (!(referenceSymbol.flags & 67108864) && searchSymbols_1.indexOf(shorthandValueSymbol) >= 0) {
-                                var referencedSymbol = getReferencedSymbol(shorthandValueSymbol);
-                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceSymbolDeclaration.name));
-                            }
-                        }
-                    });
-                }
-                return;
-                function getReferencedSymbol(symbol) {
-                    var symbolId = ts.getSymbolId(symbol);
-                    var index = symbolToIndex[symbolId];
-                    if (index === undefined) {
-                        index = result.length;
-                        symbolToIndex[symbolId] = index;
-                        result.push({
-                            definition: getDefinition(symbol),
-                            references: []
-                        });
-                    }
-                    return result[index];
-                }
-                function isInNonReferenceComment(sourceFile, position) {
-                    return ts.isInCommentHelper(sourceFile, position, isNonReferenceComment);
-                    function isNonReferenceComment(c) {
-                        var commentText = sourceFile.text.substring(c.pos, c.end);
-                        return !tripleSlashDirectivePrefixRegex.test(commentText);
-                    }
-                }
-            }
-            function getReferencesForSuperKeyword(superKeyword) {
-                var searchSpaceNode = ts.getSuperContainer(superKeyword, false);
-                if (!searchSpaceNode) {
-                    return undefined;
-                }
-                var staticFlag = 32;
-                switch (searchSpaceNode.kind) {
-                    case 145:
-                    case 144:
-                    case 147:
-                    case 146:
-                    case 148:
-                    case 149:
-                    case 150:
-                        staticFlag &= searchSpaceNode.flags;
-                        searchSpaceNode = searchSpaceNode.parent;
-                        break;
-                    default:
-                        return undefined;
-                }
-                var references = [];
-                var sourceFile = searchSpaceNode.getSourceFile();
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
-                ts.forEach(possiblePositions, function (position) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var node = ts.getTouchingWord(sourceFile, position);
-                    if (!node || node.kind !== 95) {
-                        return;
-                    }
-                    var container = ts.getSuperContainer(node, false);
-                    if (container && (32 & container.flags) === staticFlag && container.parent.symbol === searchSpaceNode.symbol) {
-                        references.push(getReferenceEntryFromNode(node));
-                    }
-                });
-                var definition = getDefinition(searchSpaceNode.symbol);
-                return [{ definition: definition, references: references }];
-            }
-            function getReferencesForThisKeyword(thisOrSuperKeyword, sourceFiles) {
-                var searchSpaceNode = ts.getThisContainer(thisOrSuperKeyword, false);
-                var staticFlag = 32;
-                switch (searchSpaceNode.kind) {
-                    case 147:
-                    case 146:
-                        if (ts.isObjectLiteralMethod(searchSpaceNode)) {
-                            break;
-                        }
-                    case 145:
-                    case 144:
-                    case 148:
-                    case 149:
-                    case 150:
-                        staticFlag &= searchSpaceNode.flags;
-                        searchSpaceNode = searchSpaceNode.parent;
-                        break;
-                    case 256:
-                        if (ts.isExternalModule(searchSpaceNode)) {
-                            return undefined;
-                        }
-                    case 220:
-                    case 179:
-                        break;
-                    default:
-                        return undefined;
-                }
-                var references = [];
-                var possiblePositions;
-                if (searchSpaceNode.kind === 256) {
-                    ts.forEach(sourceFiles, function (sourceFile) {
-                        possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", sourceFile.getStart(), sourceFile.getEnd());
-                        getThisReferencesInFile(sourceFile, sourceFile, possiblePositions, references);
-                    });
-                }
-                else {
-                    var sourceFile = searchSpaceNode.getSourceFile();
-                    possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
-                    getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, references);
-                }
-                return [{
-                        definition: {
-                            containerKind: "",
-                            containerName: "",
-                            fileName: node.getSourceFile().fileName,
-                            kind: ScriptElementKind.variableElement,
-                            name: "this",
-                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
-                        },
-                        references: references
-                    }];
-                function getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, result) {
-                    ts.forEach(possiblePositions, function (position) {
-                        cancellationToken.throwIfCancellationRequested();
-                        var node = ts.getTouchingWord(sourceFile, position);
-                        if (!node || (node.kind !== 97 && node.kind !== 165)) {
-                            return;
-                        }
-                        var container = ts.getThisContainer(node, false);
-                        switch (searchSpaceNode.kind) {
-                            case 179:
-                            case 220:
-                                if (searchSpaceNode.symbol === container.symbol) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                            case 147:
-                            case 146:
-                                if (ts.isObjectLiteralMethod(searchSpaceNode) && searchSpaceNode.symbol === container.symbol) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                            case 192:
-                            case 221:
-                                if (container.parent && searchSpaceNode.symbol === container.parent.symbol && (container.flags & 32) === staticFlag) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                            case 256:
-                                if (container.kind === 256 && !ts.isExternalModule(container)) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                        }
-                    });
-                }
-            }
-            function getReferencesForStringLiteral(node, sourceFiles) {
-                var typeChecker = program.getTypeChecker();
-                var type = getStringLiteralTypeForNode(node, typeChecker);
-                if (!type) {
-                    return undefined;
-                }
-                var references = [];
-                for (var _i = 0, sourceFiles_5 = sourceFiles; _i < sourceFiles_5.length; _i++) {
-                    var sourceFile = sourceFiles_5[_i];
-                    var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, type.text, sourceFile.getStart(), sourceFile.getEnd());
-                    getReferencesForStringLiteralInFile(sourceFile, type, possiblePositions, references);
-                }
-                return [{
-                        definition: {
-                            containerKind: "",
-                            containerName: "",
-                            fileName: node.getSourceFile().fileName,
-                            kind: ScriptElementKind.variableElement,
-                            name: type.text,
-                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
-                        },
-                        references: references
-                    }];
-                function getReferencesForStringLiteralInFile(sourceFile, searchType, possiblePositions, references) {
-                    for (var _i = 0, possiblePositions_1 = possiblePositions; _i < possiblePositions_1.length; _i++) {
-                        var position = possiblePositions_1[_i];
-                        cancellationToken.throwIfCancellationRequested();
-                        var node_2 = ts.getTouchingWord(sourceFile, position);
-                        if (!node_2 || node_2.kind !== 9) {
-                            return;
-                        }
-                        var type_1 = getStringLiteralTypeForNode(node_2, typeChecker);
-                        if (type_1 === searchType) {
-                            references.push(getReferenceEntryFromNode(node_2));
-                        }
-                    }
-                }
-            }
-            function populateSearchSymbolSet(symbol, location) {
-                var result = [symbol];
-                var containingObjectLiteralElement = getContainingObjectLiteralElement(location);
-                if (containingObjectLiteralElement && containingObjectLiteralElement.kind !== 254) {
-                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(location);
-                    if (propertySymbol) {
-                        result.push(propertySymbol);
-                    }
-                }
-                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(symbol, location);
-                if (aliasSymbol) {
-                    result = result.concat(populateSearchSymbolSet(aliasSymbol, location));
-                }
-                if (containingObjectLiteralElement) {
-                    ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
-                        ts.addRange(result, typeChecker.getRootSymbols(contextualSymbol));
-                    });
-                    var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(location.parent);
-                    if (shorthandValueSymbol) {
-                        result.push(shorthandValueSymbol);
-                    }
-                }
-                if (symbol.valueDeclaration && symbol.valueDeclaration.kind === 142 &&
-                    ts.isParameterPropertyDeclaration(symbol.valueDeclaration)) {
-                    result = result.concat(typeChecker.getSymbolsOfParameterPropertyDeclaration(symbol.valueDeclaration, symbol.name));
-                }
-                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol);
-                if (bindingElementPropertySymbol) {
-                    result.push(bindingElementPropertySymbol);
-                }
-                ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
-                    if (rootSymbol !== symbol) {
-                        result.push(rootSymbol);
-                    }
-                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 | 64)) {
-                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, {});
-                    }
-                });
-                return result;
-            }
-            function getPropertySymbolsFromBaseTypes(symbol, propertyName, result, previousIterationSymbolsCache) {
-                if (!symbol) {
-                    return;
-                }
-                if (ts.hasProperty(previousIterationSymbolsCache, symbol.name)) {
-                    return;
-                }
-                if (symbol.flags & (32 | 64)) {
-                    ts.forEach(symbol.getDeclarations(), function (declaration) {
-                        if (ts.isClassLike(declaration)) {
-                            getPropertySymbolFromTypeReference(ts.getClassExtendsHeritageClauseElement(declaration));
-                            ts.forEach(ts.getClassImplementsHeritageClauseElements(declaration), getPropertySymbolFromTypeReference);
-                        }
-                        else if (declaration.kind === 222) {
-                            ts.forEach(ts.getInterfaceBaseTypeNodes(declaration), getPropertySymbolFromTypeReference);
-                        }
-                    });
-                }
-                return;
-                function getPropertySymbolFromTypeReference(typeReference) {
-                    if (typeReference) {
-                        var type = typeChecker.getTypeAtLocation(typeReference);
-                        if (type) {
-                            var propertySymbol = typeChecker.getPropertyOfType(type, propertyName);
-                            if (propertySymbol) {
-                                result.push.apply(result, typeChecker.getRootSymbols(propertySymbol));
-                            }
-                            previousIterationSymbolsCache[symbol.name] = symbol;
-                            getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache);
-                        }
-                    }
-                }
-            }
-            function getRelatedSymbol(searchSymbols, referenceSymbol, referenceLocation) {
-                if (searchSymbols.indexOf(referenceSymbol) >= 0) {
-                    return referenceSymbol;
-                }
-                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(referenceSymbol, referenceLocation);
-                if (aliasSymbol) {
-                    return getRelatedSymbol(searchSymbols, aliasSymbol, referenceLocation);
-                }
-                var containingObjectLiteralElement = getContainingObjectLiteralElement(referenceLocation);
-                if (containingObjectLiteralElement) {
-                    var contextualSymbol = ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
-                        return ts.forEach(typeChecker.getRootSymbols(contextualSymbol), function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
-                    });
-                    if (contextualSymbol) {
-                        return contextualSymbol;
-                    }
-                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation);
-                    if (propertySymbol && searchSymbols.indexOf(propertySymbol) >= 0) {
-                        return propertySymbol;
-                    }
-                }
-                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol);
-                if (bindingElementPropertySymbol && searchSymbols.indexOf(bindingElementPropertySymbol) >= 0) {
-                    return bindingElementPropertySymbol;
-                }
-                return ts.forEach(typeChecker.getRootSymbols(referenceSymbol), function (rootSymbol) {
-                    if (searchSymbols.indexOf(rootSymbol) >= 0) {
-                        return rootSymbol;
-                    }
-                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 | 64)) {
-                        var result_4 = [];
-                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result_4, {});
-                        return ts.forEach(result_4, function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
-                    }
-                    return undefined;
-                });
-            }
-            function getNameFromObjectLiteralElement(node) {
-                if (node.name.kind === 140) {
-                    var nameExpression = node.name.expression;
-                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
-                        return nameExpression.text;
-                    }
-                    return undefined;
-                }
-                return node.name.text;
-            }
-            function getPropertySymbolsFromContextualType(node) {
-                var objectLiteral = node.parent;
-                var contextualType = typeChecker.getContextualType(objectLiteral);
-                var name = getNameFromObjectLiteralElement(node);
-                if (name && contextualType) {
-                    var result_5 = [];
-                    var symbol_1 = contextualType.getProperty(name);
-                    if (symbol_1) {
-                        result_5.push(symbol_1);
-                    }
-                    if (contextualType.flags & 16384) {
-                        ts.forEach(contextualType.types, function (t) {
-                            var symbol = t.getProperty(name);
-                            if (symbol) {
-                                result_5.push(symbol);
-                            }
-                        });
-                    }
-                    return result_5;
-                }
-                return undefined;
-            }
-            function getIntersectingMeaningFromDeclarations(meaning, declarations) {
-                if (declarations) {
-                    var lastIterationMeaning = void 0;
-                    do {
-                        lastIterationMeaning = meaning;
-                        for (var _i = 0, declarations_10 = declarations; _i < declarations_10.length; _i++) {
-                            var declaration = declarations_10[_i];
-                            var declarationMeaning = getMeaningFromDeclaration(declaration);
-                            if (declarationMeaning & meaning) {
-                                meaning |= declarationMeaning;
-                            }
-                        }
-                    } while (meaning !== lastIterationMeaning);
-                }
-                return meaning;
-            }
-        }
-        function getReferenceEntryFromNode(node) {
-            var start = node.getStart();
-            var end = node.getEnd();
-            if (node.kind === 9) {
-                start += 1;
-                end -= 1;
-            }
-            return {
-                fileName: node.getSourceFile().fileName,
-                textSpan: ts.createTextSpanFromBounds(start, end),
-                isWriteAccess: isWriteAccess(node)
-            };
-        }
-        function isWriteAccess(node) {
-            if (node.kind === 69 && ts.isDeclarationName(node)) {
-                return true;
-            }
-            var parent = node.parent;
-            if (parent) {
-                if (parent.kind === 186 || parent.kind === 185) {
-                    return true;
-                }
-                else if (parent.kind === 187 && parent.left === node) {
-                    var operator = parent.operatorToken.kind;
-                    return 56 <= operator && operator <= 68;
-                }
-            }
-            return false;
-        }
-        function getNavigateToItems(searchValue, maxResultCount) {
-            synchronizeHostData();
-            var checker = getProgram().getTypeChecker();
-            return ts.NavigateTo.getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount);
-        }
-        function getEmitOutput(fileName) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var outputFiles = [];
-            function writeFile(fileName, data, writeByteOrderMark) {
-                outputFiles.push({
-                    name: fileName,
-                    writeByteOrderMark: writeByteOrderMark,
-                    text: data
-                });
-            }
-            var emitOutput = program.emit(sourceFile, writeFile, cancellationToken);
-            return {
-                outputFiles: outputFiles,
-                emitSkipped: emitOutput.emitSkipped
-            };
-        }
-        function getMeaningFromDeclaration(node) {
-            switch (node.kind) {
-                case 142:
-                case 218:
-                case 169:
-                case 145:
-                case 144:
-                case 253:
-                case 254:
-                case 255:
-                case 147:
-                case 146:
-                case 148:
-                case 149:
-                case 150:
-                case 220:
-                case 179:
-                case 180:
-                case 252:
-                    return 1;
-                case 141:
-                case 222:
-                case 223:
-                case 159:
-                    return 2;
-                case 221:
-                case 224:
-                    return 1 | 2;
-                case 225:
-                    if (ts.isAmbientModule(node)) {
-                        return 4 | 1;
-                    }
-                    else if (ts.getModuleInstanceState(node) === 1) {
-                        return 4 | 1;
-                    }
-                    else {
-                        return 4;
-                    }
-                case 233:
-                case 234:
-                case 229:
-                case 230:
-                case 235:
-                case 236:
-                    return 1 | 2 | 4;
-                case 256:
-                    return 4 | 1;
-            }
-            return 1 | 2 | 4;
-        }
-        function isTypeReference(node) {
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(node)) {
-                node = node.parent;
-            }
-            return node.parent.kind === 155 ||
-                (node.parent.kind === 194 && !ts.isExpressionWithTypeArgumentsInClassExtendsClause(node.parent)) ||
-                (node.kind === 97 && !ts.isExpression(node)) ||
-                node.kind === 165;
-        }
-        function isNamespaceReference(node) {
-            return isQualifiedNameNamespaceReference(node) || isPropertyAccessNamespaceReference(node);
-        }
-        function isPropertyAccessNamespaceReference(node) {
-            var root = node;
-            var isLastClause = true;
-            if (root.parent.kind === 172) {
-                while (root.parent && root.parent.kind === 172) {
-                    root = root.parent;
-                }
-                isLastClause = root.name === node;
-            }
-            if (!isLastClause && root.parent.kind === 194 && root.parent.parent.kind === 251) {
-                var decl = root.parent.parent.parent;
-                return (decl.kind === 221 && root.parent.parent.token === 106) ||
-                    (decl.kind === 222 && root.parent.parent.token === 83);
-            }
-            return false;
-        }
-        function isQualifiedNameNamespaceReference(node) {
-            var root = node;
-            var isLastClause = true;
-            if (root.parent.kind === 139) {
-                while (root.parent && root.parent.kind === 139) {
-                    root = root.parent;
-                }
-                isLastClause = root.right === node;
-            }
-            return root.parent.kind === 155 && !isLastClause;
-        }
-        function isInRightSideOfImport(node) {
-            while (node.parent.kind === 139) {
-                node = node.parent;
-            }
-            return ts.isInternalModuleImportEqualsDeclaration(node.parent) && node.parent.moduleReference === node;
-        }
-        function getMeaningFromRightHandSideOfImportEquals(node) {
-            ts.Debug.assert(node.kind === 69);
-            if (node.parent.kind === 139 &&
-                node.parent.right === node &&
-                node.parent.parent.kind === 229) {
-                return 1 | 2 | 4;
-            }
-            return 4;
-        }
-        function getMeaningFromLocation(node) {
-            if (node.parent.kind === 235) {
-                return 1 | 2 | 4;
-            }
-            else if (isInRightSideOfImport(node)) {
-                return getMeaningFromRightHandSideOfImportEquals(node);
-            }
-            else if (ts.isDeclarationName(node)) {
-                return getMeaningFromDeclaration(node.parent);
-            }
-            else if (isTypeReference(node)) {
-                return 2;
-            }
-            else if (isNamespaceReference(node)) {
-                return 4;
-            }
-            else {
-                return 1;
-            }
-        }
-        function getSignatureHelpItems(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            return ts.SignatureHelp.getSignatureHelpItems(program, sourceFile, position, cancellationToken);
-        }
-        function getNonBoundSourceFile(fileName) {
-            return syntaxTreeCache.getCurrentSourceFile(fileName);
-        }
-        function getNameOrDottedNameSpan(fileName, startPos, endPos) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, startPos);
-            if (node === sourceFile) {
-                return;
-            }
-            switch (node.kind) {
-                case 172:
-                case 139:
-                case 9:
-                case 166:
-                case 84:
-                case 99:
-                case 93:
-                case 95:
-                case 97:
-                case 165:
-                case 69:
-                    break;
-                default:
-                    return;
-            }
-            var nodeForStartPos = node;
-            while (true) {
-                if (isRightSideOfPropertyAccess(nodeForStartPos) || isRightSideOfQualifiedName(nodeForStartPos)) {
-                    nodeForStartPos = nodeForStartPos.parent;
-                }
-                else if (isNameOfModuleDeclaration(nodeForStartPos)) {
-                    if (nodeForStartPos.parent.parent.kind === 225 &&
-                        nodeForStartPos.parent.parent.body === nodeForStartPos.parent) {
-                        nodeForStartPos = nodeForStartPos.parent.parent.name;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                else {
-                    break;
-                }
-            }
-            return ts.createTextSpanFromBounds(nodeForStartPos.getStart(), node.getEnd());
-        }
-        function getBreakpointStatementAtPosition(fileName, position) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.BreakpointResolver.spanInSourceFileAtLocation(sourceFile, position);
-        }
-        function getNavigationBarItems(fileName) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.NavigationBar.getNavigationBarItems(sourceFile, host.getCompilationSettings());
-        }
-        function getSemanticClassifications(fileName, span) {
-            return convertClassifications(getEncodedSemanticClassifications(fileName, span));
-        }
-        function checkForClassificationCancellation(kind) {
-            switch (kind) {
-                case 225:
-                case 221:
-                case 222:
-                case 220:
-                    cancellationToken.throwIfCancellationRequested();
-            }
-        }
-        function getEncodedSemanticClassifications(fileName, span) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var typeChecker = program.getTypeChecker();
-            var result = [];
-            var classifiableNames = program.getClassifiableNames();
-            processNode(sourceFile);
-            return { spans: result, endOfLineState: 0 };
-            function pushClassification(start, length, type) {
-                result.push(start);
-                result.push(length);
-                result.push(type);
-            }
-            function classifySymbol(symbol, meaningAtPosition) {
-                var flags = symbol.getFlags();
-                if ((flags & 788448) === 0) {
-                    return;
-                }
-                if (flags & 32) {
-                    return 11;
-                }
-                else if (flags & 384) {
-                    return 12;
-                }
-                else if (flags & 524288) {
-                    return 16;
-                }
-                else if (meaningAtPosition & 2) {
-                    if (flags & 64) {
-                        return 13;
-                    }
-                    else if (flags & 262144) {
-                        return 15;
-                    }
-                }
-                else if (flags & 1536) {
-                    if (meaningAtPosition & 4 ||
-                        (meaningAtPosition & 1 && hasValueSideModule(symbol))) {
-                        return 14;
-                    }
-                }
-                return undefined;
-                function hasValueSideModule(symbol) {
-                    return ts.forEach(symbol.declarations, function (declaration) {
-                        return declaration.kind === 225 &&
-                            ts.getModuleInstanceState(declaration) === 1;
-                    });
-                }
-            }
-            function processNode(node) {
-                if (node && ts.textSpanIntersectsWith(span, node.getFullStart(), node.getFullWidth())) {
-                    var kind = node.kind;
-                    checkForClassificationCancellation(kind);
-                    if (kind === 69 && !ts.nodeIsMissing(node)) {
-                        var identifier = node;
-                        if (classifiableNames[identifier.text]) {
-                            var symbol = typeChecker.getSymbolAtLocation(node);
-                            if (symbol) {
-                                var type = classifySymbol(symbol, getMeaningFromLocation(node));
-                                if (type) {
-                                    pushClassification(node.getStart(), node.getWidth(), type);
-                                }
-                            }
-                        }
-                    }
-                    ts.forEachChild(node, processNode);
-                }
-            }
-        }
-        function getClassificationTypeName(type) {
-            switch (type) {
-                case 1: return ClassificationTypeNames.comment;
-                case 2: return ClassificationTypeNames.identifier;
-                case 3: return ClassificationTypeNames.keyword;
-                case 4: return ClassificationTypeNames.numericLiteral;
-                case 5: return ClassificationTypeNames.operator;
-                case 6: return ClassificationTypeNames.stringLiteral;
-                case 8: return ClassificationTypeNames.whiteSpace;
-                case 9: return ClassificationTypeNames.text;
-                case 10: return ClassificationTypeNames.punctuation;
-                case 11: return ClassificationTypeNames.className;
-                case 12: return ClassificationTypeNames.enumName;
-                case 13: return ClassificationTypeNames.interfaceName;
-                case 14: return ClassificationTypeNames.moduleName;
-                case 15: return ClassificationTypeNames.typeParameterName;
-                case 16: return ClassificationTypeNames.typeAliasName;
-                case 17: return ClassificationTypeNames.parameterName;
-                case 18: return ClassificationTypeNames.docCommentTagName;
-                case 19: return ClassificationTypeNames.jsxOpenTagName;
-                case 20: return ClassificationTypeNames.jsxCloseTagName;
-                case 21: return ClassificationTypeNames.jsxSelfClosingTagName;
-                case 22: return ClassificationTypeNames.jsxAttribute;
-                case 23: return ClassificationTypeNames.jsxText;
-                case 24: return ClassificationTypeNames.jsxAttributeStringLiteralValue;
-            }
-        }
-        function convertClassifications(classifications) {
-            ts.Debug.assert(classifications.spans.length % 3 === 0);
-            var dense = classifications.spans;
-            var result = [];
-            for (var i = 0, n = dense.length; i < n; i += 3) {
-                result.push({
-                    textSpan: ts.createTextSpan(dense[i], dense[i + 1]),
-                    classificationType: getClassificationTypeName(dense[i + 2])
-                });
-            }
-            return result;
-        }
-        function getSyntacticClassifications(fileName, span) {
-            return convertClassifications(getEncodedSyntacticClassifications(fileName, span));
-        }
-        function getEncodedSyntacticClassifications(fileName, span) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            var spanStart = span.start;
-            var spanLength = span.length;
-            var triviaScanner = ts.createScanner(2, false, sourceFile.languageVariant, sourceFile.text);
-            var mergeConflictScanner = ts.createScanner(2, false, sourceFile.languageVariant, sourceFile.text);
-            var result = [];
-            processElement(sourceFile);
-            return { spans: result, endOfLineState: 0 };
-            function pushClassification(start, length, type) {
-                result.push(start);
-                result.push(length);
-                result.push(type);
-            }
-            function classifyLeadingTriviaAndGetTokenStart(token) {
-                triviaScanner.setTextPos(token.pos);
-                while (true) {
-                    var start = triviaScanner.getTextPos();
-                    if (!ts.couldStartTrivia(sourceFile.text, start)) {
-                        return start;
-                    }
-                    var kind = triviaScanner.scan();
-                    var end = triviaScanner.getTextPos();
-                    var width = end - start;
-                    if (!ts.isTrivia(kind)) {
-                        return start;
-                    }
-                    if (kind === 4 || kind === 5) {
-                        continue;
-                    }
-                    if (ts.isComment(kind)) {
-                        classifyComment(token, kind, start, width);
-                        triviaScanner.setTextPos(end);
-                        continue;
-                    }
-                    if (kind === 7) {
-                        var text = sourceFile.text;
-                        var ch = text.charCodeAt(start);
-                        if (ch === 60 || ch === 62) {
-                            pushClassification(start, width, 1);
-                            continue;
-                        }
-                        ts.Debug.assert(ch === 61);
-                        classifyDisabledMergeCode(text, start, end);
-                    }
-                }
-            }
-            function classifyComment(token, kind, start, width) {
-                if (kind === 3) {
-                    var docCommentAndDiagnostics = ts.parseIsolatedJSDocComment(sourceFile.text, start, width);
-                    if (docCommentAndDiagnostics && docCommentAndDiagnostics.jsDocComment) {
-                        docCommentAndDiagnostics.jsDocComment.parent = token;
-                        classifyJSDocComment(docCommentAndDiagnostics.jsDocComment);
-                        return;
-                    }
-                }
-                pushCommentRange(start, width);
-            }
-            function pushCommentRange(start, width) {
-                pushClassification(start, width, 1);
-            }
-            function classifyJSDocComment(docComment) {
-                var pos = docComment.pos;
-                for (var _i = 0, _a = docComment.tags; _i < _a.length; _i++) {
-                    var tag = _a[_i];
-                    if (tag.pos !== pos) {
-                        pushCommentRange(pos, tag.pos - pos);
-                    }
-                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, 10);
-                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, 18);
-                    pos = tag.tagName.end;
-                    switch (tag.kind) {
-                        case 275:
-                            processJSDocParameterTag(tag);
-                            break;
-                        case 278:
-                            processJSDocTemplateTag(tag);
-                            break;
-                        case 277:
-                            processElement(tag.typeExpression);
-                            break;
-                        case 276:
-                            processElement(tag.typeExpression);
-                            break;
-                    }
-                    pos = tag.end;
-                }
-                if (pos !== docComment.end) {
-                    pushCommentRange(pos, docComment.end - pos);
-                }
-                return;
-                function processJSDocParameterTag(tag) {
-                    if (tag.preParameterName) {
-                        pushCommentRange(pos, tag.preParameterName.pos - pos);
-                        pushClassification(tag.preParameterName.pos, tag.preParameterName.end - tag.preParameterName.pos, 17);
-                        pos = tag.preParameterName.end;
-                    }
-                    if (tag.typeExpression) {
-                        pushCommentRange(pos, tag.typeExpression.pos - pos);
-                        processElement(tag.typeExpression);
-                        pos = tag.typeExpression.end;
-                    }
-                    if (tag.postParameterName) {
-                        pushCommentRange(pos, tag.postParameterName.pos - pos);
-                        pushClassification(tag.postParameterName.pos, tag.postParameterName.end - tag.postParameterName.pos, 17);
-                        pos = tag.postParameterName.end;
-                    }
-                }
-            }
-            function processJSDocTemplateTag(tag) {
-                for (var _i = 0, _a = tag.getChildren(); _i < _a.length; _i++) {
-                    var child = _a[_i];
-                    processElement(child);
-                }
-            }
-            function classifyDisabledMergeCode(text, start, end) {
-                var i;
-                for (i = start; i < end; i++) {
-                    if (ts.isLineBreak(text.charCodeAt(i))) {
-                        break;
-                    }
-                }
-                pushClassification(start, i - start, 1);
-                mergeConflictScanner.setTextPos(i);
-                while (mergeConflictScanner.getTextPos() < end) {
-                    classifyDisabledCodeToken();
-                }
-            }
-            function classifyDisabledCodeToken() {
-                var start = mergeConflictScanner.getTextPos();
-                var tokenKind = mergeConflictScanner.scan();
-                var end = mergeConflictScanner.getTextPos();
-                var type = classifyTokenType(tokenKind);
-                if (type) {
-                    pushClassification(start, end - start, type);
-                }
-            }
-            function tryClassifyNode(node) {
-                if (ts.nodeIsMissing(node)) {
-                    return true;
-                }
-                var classifiedElementName = tryClassifyJsxElementName(node);
-                if (!ts.isToken(node) && node.kind !== 244 && classifiedElementName === undefined) {
-                    return false;
-                }
-                var tokenStart = node.kind === 244 ? node.pos : classifyLeadingTriviaAndGetTokenStart(node);
-                var tokenWidth = node.end - tokenStart;
-                ts.Debug.assert(tokenWidth >= 0);
-                if (tokenWidth > 0) {
-                    var type = classifiedElementName || classifyTokenType(node.kind, node);
-                    if (type) {
-                        pushClassification(tokenStart, tokenWidth, type);
-                    }
-                }
-                return true;
-            }
-            function tryClassifyJsxElementName(token) {
-                switch (token.parent && token.parent.kind) {
-                    case 243:
-                        if (token.parent.tagName === token) {
-                            return 19;
-                        }
-                        break;
-                    case 245:
-                        if (token.parent.tagName === token) {
-                            return 20;
-                        }
-                        break;
-                    case 242:
-                        if (token.parent.tagName === token) {
-                            return 21;
-                        }
-                        break;
-                    case 246:
-                        if (token.parent.name === token) {
-                            return 22;
-                        }
-                        break;
-                }
-                return undefined;
-            }
-            function classifyTokenType(tokenKind, token) {
-                if (ts.isKeyword(tokenKind)) {
-                    return 3;
-                }
-                if (tokenKind === 25 || tokenKind === 27) {
-                    if (token && ts.getTypeArgumentOrTypeParameterList(token.parent)) {
-                        return 10;
-                    }
-                }
-                if (ts.isPunctuation(tokenKind)) {
-                    if (token) {
-                        if (tokenKind === 56) {
-                            if (token.parent.kind === 218 ||
-                                token.parent.kind === 145 ||
-                                token.parent.kind === 142 ||
-                                token.parent.kind === 246) {
-                                return 5;
-                            }
-                        }
-                        if (token.parent.kind === 187 ||
-                            token.parent.kind === 185 ||
-                            token.parent.kind === 186 ||
-                            token.parent.kind === 188) {
-                            return 5;
-                        }
-                    }
-                    return 10;
-                }
-                else if (tokenKind === 8) {
-                    return 4;
-                }
-                else if (tokenKind === 9 || tokenKind === 166) {
-                    return token.parent.kind === 246 ? 24 : 6;
-                }
-                else if (tokenKind === 10) {
-                    return 6;
-                }
-                else if (ts.isTemplateLiteralKind(tokenKind)) {
-                    return 6;
-                }
-                else if (tokenKind === 244) {
-                    return 23;
-                }
-                else if (tokenKind === 69) {
-                    if (token) {
-                        switch (token.parent.kind) {
-                            case 221:
-                                if (token.parent.name === token) {
-                                    return 11;
-                                }
-                                return;
-                            case 141:
-                                if (token.parent.name === token) {
-                                    return 15;
-                                }
-                                return;
-                            case 222:
-                                if (token.parent.name === token) {
-                                    return 13;
-                                }
-                                return;
-                            case 224:
-                                if (token.parent.name === token) {
-                                    return 12;
-                                }
-                                return;
-                            case 225:
-                                if (token.parent.name === token) {
-                                    return 14;
-                                }
-                                return;
-                            case 142:
-                                if (token.parent.name === token) {
-                                    return 17;
-                                }
-                                return;
-                        }
-                    }
-                    return 2;
-                }
-            }
-            function processElement(element) {
-                if (!element) {
-                    return;
-                }
-                if (ts.decodedTextSpanIntersectsWith(spanStart, spanLength, element.pos, element.getFullWidth())) {
-                    checkForClassificationCancellation(element.kind);
-                    var children = element.getChildren(sourceFile);
-                    for (var i = 0, n = children.length; i < n; i++) {
-                        var child = children[i];
-                        if (!tryClassifyNode(child)) {
-                            processElement(child);
-                        }
-                    }
-                }
-            }
-        }
-        function getOutliningSpans(fileName) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.OutliningElementsCollector.collectElements(sourceFile);
-        }
-        function getBraceMatchingAtPosition(fileName, position) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            var result = [];
-            var token = ts.getTouchingToken(sourceFile, position);
-            if (token.getStart(sourceFile) === position) {
-                var matchKind = getMatchingTokenKind(token);
-                if (matchKind) {
-                    var parentElement = token.parent;
-                    var childNodes = parentElement.getChildren(sourceFile);
-                    for (var _i = 0, childNodes_1 = childNodes; _i < childNodes_1.length; _i++) {
-                        var current = childNodes_1[_i];
-                        if (current.kind === matchKind) {
-                            var range1 = ts.createTextSpan(token.getStart(sourceFile), token.getWidth(sourceFile));
-                            var range2 = ts.createTextSpan(current.getStart(sourceFile), current.getWidth(sourceFile));
-                            if (range1.start < range2.start) {
-                                result.push(range1, range2);
-                            }
-                            else {
-                                result.push(range2, range1);
-                            }
-                            break;
-                        }
-                    }
-                }
-            }
-            return result;
-            function getMatchingTokenKind(token) {
-                switch (token.kind) {
-                    case 15: return 16;
-                    case 17: return 18;
-                    case 19: return 20;
-                    case 25: return 27;
-                    case 16: return 15;
-                    case 18: return 17;
-                    case 20: return 19;
-                    case 27: return 25;
-                }
-                return undefined;
-            }
-        }
-        function getIndentationAtPosition(fileName, position, editorOptions) {
-            var start = new Date().getTime();
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            log("getIndentationAtPosition: getCurrentSourceFile: " + (new Date().getTime() - start));
-            start = new Date().getTime();
-            var result = ts.formatting.SmartIndenter.getIndentation(position, sourceFile, editorOptions);
-            log("getIndentationAtPosition: computeIndentation  : " + (new Date().getTime() - start));
-            return result;
-        }
-        function getFormattingEditsForRange(fileName, start, end, options) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.formatting.formatSelection(start, end, sourceFile, getRuleProvider(options), options);
-        }
-        function getFormattingEditsForDocument(fileName, options) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.formatting.formatDocument(sourceFile, getRuleProvider(options), options);
-        }
-        function getFormattingEditsAfterKeystroke(fileName, position, key, options) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            if (key === "}") {
-                return ts.formatting.formatOnClosingCurly(position, sourceFile, getRuleProvider(options), options);
-            }
-            else if (key === ";") {
-                return ts.formatting.formatOnSemicolon(position, sourceFile, getRuleProvider(options), options);
-            }
-            else if (key === "\n") {
-                return ts.formatting.formatOnEnter(position, sourceFile, getRuleProvider(options), options);
-            }
-            return [];
-        }
-        function getDocCommentTemplateAtPosition(fileName, position) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position) || ts.hasDocComment(sourceFile, position)) {
-                return undefined;
-            }
-            var tokenAtPos = ts.getTokenAtPosition(sourceFile, position);
-            var tokenStart = tokenAtPos.getStart();
-            if (!tokenAtPos || tokenStart < position) {
-                return undefined;
-            }
-            var commentOwner;
-            findOwner: for (commentOwner = tokenAtPos; commentOwner; commentOwner = commentOwner.parent) {
-                switch (commentOwner.kind) {
-                    case 220:
-                    case 147:
-                    case 148:
-                    case 221:
-                    case 200:
-                        break findOwner;
-                    case 256:
-                        return undefined;
-                    case 225:
-                        if (commentOwner.parent.kind === 225) {
-                            return undefined;
-                        }
-                        break findOwner;
-                }
-            }
-            if (!commentOwner || commentOwner.getStart() < position) {
-                return undefined;
-            }
-            var parameters = getParametersForJsDocOwningNode(commentOwner);
-            var posLineAndChar = sourceFile.getLineAndCharacterOfPosition(position);
-            var lineStart = sourceFile.getLineStarts()[posLineAndChar.line];
-            var indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character);
-            var newLine = ts.getNewLineOrDefaultFromHost(host);
-            var docParams = "";
-            for (var i = 0, numParams = parameters.length; i < numParams; i++) {
-                var currentName = parameters[i].name;
-                var paramName = currentName.kind === 69 ?
-                    currentName.text :
-                    "param" + i;
-                docParams += indentationStr + " * @param " + paramName + newLine;
-            }
-            var preamble = "/**" + newLine +
-                indentationStr + " * ";
-            var result = preamble + newLine +
-                docParams +
-                indentationStr + " */" +
-                (tokenStart === position ? newLine + indentationStr : "");
-            return { newText: result, caretOffset: preamble.length };
-        }
-        function isValidBraceCompletionAtPostion(fileName, position, openingBrace) {
-            if (openingBrace === 60) {
-                return false;
-            }
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position)) {
-                return false;
-            }
-            if (ts.isInsideJsxElementOrAttribute(sourceFile, position)) {
-                return openingBrace === 123;
-            }
-            if (ts.isInTemplateString(sourceFile, position)) {
-                return false;
-            }
-            return true;
-        }
-        function getParametersForJsDocOwningNode(commentOwner) {
-            if (ts.isFunctionLike(commentOwner)) {
-                return commentOwner.parameters;
-            }
-            if (commentOwner.kind === 200) {
-                var varStatement = commentOwner;
-                var varDeclarations = varStatement.declarationList.declarations;
-                if (varDeclarations.length === 1 && varDeclarations[0].initializer) {
-                    return getParametersFromRightHandSideOfAssignment(varDeclarations[0].initializer);
-                }
-            }
-            return emptyArray;
-        }
-        function getParametersFromRightHandSideOfAssignment(rightHandSide) {
-            while (rightHandSide.kind === 178) {
-                rightHandSide = rightHandSide.expression;
-            }
-            switch (rightHandSide.kind) {
-                case 179:
-                case 180:
-                    return rightHandSide.parameters;
-                case 192:
-                    for (var _i = 0, _a = rightHandSide.members; _i < _a.length; _i++) {
-                        var member = _a[_i];
-                        if (member.kind === 148) {
-                            return member.parameters;
-                        }
-                    }
-                    break;
-            }
-            return emptyArray;
-        }
-        function getTodoComments(fileName, descriptors) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            cancellationToken.throwIfCancellationRequested();
-            var fileContents = sourceFile.text;
-            var result = [];
-            if (descriptors.length > 0) {
-                var regExp = getTodoCommentsRegExp();
-                var matchArray = void 0;
-                while (matchArray = regExp.exec(fileContents)) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var firstDescriptorCaptureIndex = 3;
-                    ts.Debug.assert(matchArray.length === descriptors.length + firstDescriptorCaptureIndex);
-                    var preamble = matchArray[1];
-                    var matchPosition = matchArray.index + preamble.length;
-                    var token = ts.getTokenAtPosition(sourceFile, matchPosition);
-                    if (!isInsideComment(sourceFile, token, matchPosition)) {
-                        continue;
-                    }
-                    var descriptor = undefined;
-                    for (var i = 0, n = descriptors.length; i < n; i++) {
-                        if (matchArray[i + firstDescriptorCaptureIndex]) {
-                            descriptor = descriptors[i];
-                        }
-                    }
-                    ts.Debug.assert(descriptor !== undefined);
-                    if (isLetterOrDigit(fileContents.charCodeAt(matchPosition + descriptor.text.length))) {
-                        continue;
-                    }
-                    var message = matchArray[2];
-                    result.push({
-                        descriptor: descriptor,
-                        message: message,
-                        position: matchPosition
-                    });
-                }
-            }
-            return result;
-            function escapeRegExp(str) {
-                return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
-            }
-            function getTodoCommentsRegExp() {
-                var singleLineCommentStart = /(?:\/\/+\s*)/.source;
-                var multiLineCommentStart = /(?:\/\*+\s*)/.source;
-                var anyNumberOfSpacesAndAsterisksAtStartOfLine = /(?:^(?:\s|\*)*)/.source;
-                var preamble = "(" + anyNumberOfSpacesAndAsterisksAtStartOfLine + "|" + singleLineCommentStart + "|" + multiLineCommentStart + ")";
-                var literals = "(?:" + ts.map(descriptors, function (d) { return "(" + escapeRegExp(d.text) + ")"; }).join("|") + ")";
-                var endOfLineOrEndOfComment = /(?:$|\*\/)/.source;
-                var messageRemainder = /(?:.*?)/.source;
-                var messagePortion = "(" + literals + messageRemainder + ")";
-                var regExpString = preamble + messagePortion + endOfLineOrEndOfComment;
-                return new RegExp(regExpString, "gim");
-            }
-            function isLetterOrDigit(char) {
-                return (char >= 97 && char <= 122) ||
-                    (char >= 65 && char <= 90) ||
-                    (char >= 48 && char <= 57);
-            }
-        }
-        function getStringLiteralTypeForNode(node, typeChecker) {
-            var searchNode = node.parent.kind === 166 ? node.parent : node;
-            var type = typeChecker.getTypeAtLocation(searchNode);
-            if (type && type.flags & 256) {
-                return type;
-            }
-            return undefined;
-        }
-        function getRenameInfo(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var typeChecker = program.getTypeChecker();
-            var defaultLibFileName = host.getDefaultLibFileName(host.getCompilationSettings());
-            var canonicalDefaultLibName = getCanonicalFileName(ts.normalizePath(defaultLibFileName));
-            var node = ts.getTouchingWord(sourceFile, position);
-            if (node) {
-                if (node.kind === 69 ||
-                    node.kind === 9 ||
-                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                    var symbol = typeChecker.getSymbolAtLocation(node);
-                    if (symbol) {
-                        var declarations = symbol.getDeclarations();
-                        if (declarations && declarations.length > 0) {
-                            if (ts.forEach(declarations, isDefinedInLibraryFile)) {
-                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                            }
-                            var displayName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
-                            var kind = getSymbolKind(symbol, node);
-                            if (kind) {
-                                return {
-                                    canRename: true,
-                                    kind: kind,
-                                    displayName: displayName,
-                                    localizedErrorMessage: undefined,
-                                    fullDisplayName: typeChecker.getFullyQualifiedName(symbol),
-                                    kindModifiers: getSymbolModifiers(symbol),
-                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                                };
-                            }
-                        }
-                    }
-                    else if (node.kind === 9) {
-                        var type = getStringLiteralTypeForNode(node, typeChecker);
-                        if (type) {
-                            if (isDefinedInLibraryFile(node)) {
-                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                            }
-                            else {
-                                var displayName = ts.stripQuotes(type.text);
-                                return {
-                                    canRename: true,
-                                    kind: ScriptElementKind.variableElement,
-                                    displayName: displayName,
-                                    localizedErrorMessage: undefined,
-                                    fullDisplayName: displayName,
-                                    kindModifiers: ScriptElementKindModifier.none,
-                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                                };
-                            }
-                        }
-                    }
-                }
-            }
-            return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_this_element));
-            function getRenameInfoError(localizedErrorMessage) {
-                return {
-                    canRename: false,
-                    localizedErrorMessage: localizedErrorMessage,
-                    displayName: undefined,
-                    fullDisplayName: undefined,
-                    kind: undefined,
-                    kindModifiers: undefined,
-                    triggerSpan: undefined
-                };
-            }
-            function isDefinedInLibraryFile(declaration) {
-                if (defaultLibFileName) {
-                    var sourceFile_3 = declaration.getSourceFile();
-                    var canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile_3.fileName));
-                    if (canonicalName === canonicalDefaultLibName) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function createTriggerSpanForNode(node, sourceFile) {
-                var start = node.getStart(sourceFile);
-                var width = node.getWidth(sourceFile);
-                if (node.kind === 9) {
-                    start += 1;
-                    width -= 2;
-                }
-                return ts.createTextSpan(start, width);
-            }
-        }
-        return {
-            dispose: dispose,
-            cleanupSemanticCache: cleanupSemanticCache,
-            getSyntacticDiagnostics: getSyntacticDiagnostics,
-            getSemanticDiagnostics: getSemanticDiagnostics,
-            getCompilerOptionsDiagnostics: getCompilerOptionsDiagnostics,
-            getSyntacticClassifications: getSyntacticClassifications,
-            getSemanticClassifications: getSemanticClassifications,
-            getEncodedSyntacticClassifications: getEncodedSyntacticClassifications,
-            getEncodedSemanticClassifications: getEncodedSemanticClassifications,
-            getCompletionsAtPosition: getCompletionsAtPosition,
-            getCompletionEntryDetails: getCompletionEntryDetails,
-            getSignatureHelpItems: getSignatureHelpItems,
-            getQuickInfoAtPosition: getQuickInfoAtPosition,
-            getDefinitionAtPosition: getDefinitionAtPosition,
-            getTypeDefinitionAtPosition: getTypeDefinitionAtPosition,
-            getReferencesAtPosition: getReferencesAtPosition,
-            findReferences: findReferences,
-            getOccurrencesAtPosition: getOccurrencesAtPosition,
-            getDocumentHighlights: getDocumentHighlights,
-            getNameOrDottedNameSpan: getNameOrDottedNameSpan,
-            getBreakpointStatementAtPosition: getBreakpointStatementAtPosition,
-            getNavigateToItems: getNavigateToItems,
-            getRenameInfo: getRenameInfo,
-            findRenameLocations: findRenameLocations,
-            getNavigationBarItems: getNavigationBarItems,
-            getOutliningSpans: getOutliningSpans,
-            getTodoComments: getTodoComments,
-            getBraceMatchingAtPosition: getBraceMatchingAtPosition,
-            getIndentationAtPosition: getIndentationAtPosition,
-            getFormattingEditsForRange: getFormattingEditsForRange,
-            getFormattingEditsForDocument: getFormattingEditsForDocument,
-            getFormattingEditsAfterKeystroke: getFormattingEditsAfterKeystroke,
-            getDocCommentTemplateAtPosition: getDocCommentTemplateAtPosition,
-            isValidBraceCompletionAtPostion: isValidBraceCompletionAtPostion,
-            getEmitOutput: getEmitOutput,
-            getNonBoundSourceFile: getNonBoundSourceFile,
-            getProgram: getProgram
-        };
-    }
-    ts.createLanguageService = createLanguageService;
-    function getNameTable(sourceFile) {
-        if (!sourceFile.nameTable) {
-            initializeNameTable(sourceFile);
-        }
-        return sourceFile.nameTable;
-    }
-    ts.getNameTable = getNameTable;
-    function initializeNameTable(sourceFile) {
-        var nameTable = {};
-        walk(sourceFile);
-        sourceFile.nameTable = nameTable;
-        function walk(node) {
-            switch (node.kind) {
-                case 69:
-                    nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
-                    break;
-                case 9:
-                case 8:
-                    if (ts.isDeclarationName(node) ||
-                        node.parent.kind === 240 ||
-                        isArgumentOfElementAccessExpression(node) ||
-                        ts.isLiteralComputedPropertyDeclarationName(node)) {
-                        nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
-                    }
-                    break;
-                default:
-                    ts.forEachChild(node, walk);
-            }
-        }
-    }
-    function isArgumentOfElementAccessExpression(node) {
-        return node &&
-            node.parent &&
-            node.parent.kind === 173 &&
-            node.parent.argumentExpression === node;
-    }
-    function createClassifier() {
-        var scanner = ts.createScanner(2, false);
-        var noRegexTable = [];
-        noRegexTable[69] = true;
-        noRegexTable[9] = true;
-        noRegexTable[8] = true;
-        noRegexTable[10] = true;
-        noRegexTable[97] = true;
-        noRegexTable[41] = true;
-        noRegexTable[42] = true;
-        noRegexTable[18] = true;
-        noRegexTable[20] = true;
-        noRegexTable[16] = true;
-        noRegexTable[99] = true;
-        noRegexTable[84] = true;
-        var templateStack = [];
-        function canFollow(keyword1, keyword2) {
-            if (ts.isAccessibilityModifier(keyword1)) {
-                if (keyword2 === 123 ||
-                    keyword2 === 131 ||
-                    keyword2 === 121 ||
-                    keyword2 === 113) {
-                    return true;
-                }
-                return false;
-            }
-            return true;
-        }
-        function convertClassifications(classifications, text) {
-            var entries = [];
-            var dense = classifications.spans;
-            var lastEnd = 0;
-            for (var i = 0, n = dense.length; i < n; i += 3) {
-                var start = dense[i];
-                var length_3 = dense[i + 1];
-                var type = dense[i + 2];
-                if (lastEnd >= 0) {
-                    var whitespaceLength_1 = start - lastEnd;
-                    if (whitespaceLength_1 > 0) {
-                        entries.push({ length: whitespaceLength_1, classification: TokenClass.Whitespace });
-                    }
-                }
-                entries.push({ length: length_3, classification: convertClassification(type) });
-                lastEnd = start + length_3;
-            }
-            var whitespaceLength = text.length - lastEnd;
-            if (whitespaceLength > 0) {
-                entries.push({ length: whitespaceLength, classification: TokenClass.Whitespace });
-            }
-            return { entries: entries, finalLexState: classifications.endOfLineState };
-        }
-        function convertClassification(type) {
-            switch (type) {
-                case 1: return TokenClass.Comment;
-                case 3: return TokenClass.Keyword;
-                case 4: return TokenClass.NumberLiteral;
-                case 5: return TokenClass.Operator;
-                case 6: return TokenClass.StringLiteral;
-                case 8: return TokenClass.Whitespace;
-                case 10: return TokenClass.Punctuation;
-                case 2:
-                case 11:
-                case 12:
-                case 13:
-                case 14:
-                case 15:
-                case 16:
-                case 9:
-                case 17:
-                default:
-                    return TokenClass.Identifier;
-            }
-        }
-        function getClassificationsForLine(text, lexState, syntacticClassifierAbsent) {
-            return convertClassifications(getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent), text);
-        }
-        function getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent) {
-            var offset = 0;
-            var token = 0;
-            var lastNonTriviaToken = 0;
-            while (templateStack.length > 0) {
-                templateStack.pop();
-            }
-            switch (lexState) {
-                case 3:
-                    text = "\"\\\n" + text;
-                    offset = 3;
-                    break;
-                case 2:
-                    text = "'\\\n" + text;
-                    offset = 3;
-                    break;
-                case 1:
-                    text = "/*\n" + text;
-                    offset = 3;
-                    break;
-                case 4:
-                    text = "`\n" + text;
-                    offset = 2;
-                    break;
-                case 5:
-                    text = "}\n" + text;
-                    offset = 2;
-                case 6:
-                    templateStack.push(12);
-                    break;
-            }
-            scanner.setText(text);
-            var result = {
-                endOfLineState: 0,
-                spans: []
-            };
-            var angleBracketStack = 0;
-            do {
-                token = scanner.scan();
-                if (!ts.isTrivia(token)) {
-                    if ((token === 39 || token === 61) && !noRegexTable[lastNonTriviaToken]) {
-                        if (scanner.reScanSlashToken() === 10) {
-                            token = 10;
-                        }
-                    }
-                    else if (lastNonTriviaToken === 21 && isKeyword(token)) {
-                        token = 69;
-                    }
-                    else if (isKeyword(lastNonTriviaToken) && isKeyword(token) && !canFollow(lastNonTriviaToken, token)) {
-                        token = 69;
-                    }
-                    else if (lastNonTriviaToken === 69 &&
-                        token === 25) {
-                        angleBracketStack++;
-                    }
-                    else if (token === 27 && angleBracketStack > 0) {
-                        angleBracketStack--;
-                    }
-                    else if (token === 117 ||
-                        token === 132 ||
-                        token === 130 ||
-                        token === 120 ||
-                        token === 133) {
-                        if (angleBracketStack > 0 && !syntacticClassifierAbsent) {
-                            token = 69;
-                        }
-                    }
-                    else if (token === 12) {
-                        templateStack.push(token);
-                    }
-                    else if (token === 15) {
-                        if (templateStack.length > 0) {
-                            templateStack.push(token);
-                        }
-                    }
-                    else if (token === 16) {
-                        if (templateStack.length > 0) {
-                            var lastTemplateStackToken = ts.lastOrUndefined(templateStack);
-                            if (lastTemplateStackToken === 12) {
-                                token = scanner.reScanTemplateToken();
-                                if (token === 14) {
-                                    templateStack.pop();
-                                }
-                                else {
-                                    ts.Debug.assert(token === 13, "Should have been a template middle. Was " + token);
-                                }
-                            }
-                            else {
-                                ts.Debug.assert(lastTemplateStackToken === 15, "Should have been an open brace. Was: " + token);
-                                templateStack.pop();
-                            }
-                        }
-                    }
-                    lastNonTriviaToken = token;
-                }
-                processToken();
-            } while (token !== 1);
-            return result;
-            function processToken() {
-                var start = scanner.getTokenPos();
-                var end = scanner.getTextPos();
-                addResult(start, end, classFromKind(token));
-                if (end >= text.length) {
-                    if (token === 9 || token === 166) {
-                        var tokenText = scanner.getTokenText();
-                        if (scanner.isUnterminated()) {
-                            var lastCharIndex = tokenText.length - 1;
-                            var numBackslashes = 0;
-                            while (tokenText.charCodeAt(lastCharIndex - numBackslashes) === 92) {
-                                numBackslashes++;
-                            }
-                            if (numBackslashes & 1) {
-                                var quoteChar = tokenText.charCodeAt(0);
-                                result.endOfLineState = quoteChar === 34
-                                    ? 3
-                                    : 2;
-                            }
-                        }
-                    }
-                    else if (token === 3) {
-                        if (scanner.isUnterminated()) {
-                            result.endOfLineState = 1;
-                        }
-                    }
-                    else if (ts.isTemplateLiteralKind(token)) {
-                        if (scanner.isUnterminated()) {
-                            if (token === 14) {
-                                result.endOfLineState = 5;
-                            }
-                            else if (token === 11) {
-                                result.endOfLineState = 4;
-                            }
-                            else {
-                                ts.Debug.fail("Only 'NoSubstitutionTemplateLiteral's and 'TemplateTail's can be unterminated; got SyntaxKind #" + token);
-                            }
-                        }
-                    }
-                    else if (templateStack.length > 0 && ts.lastOrUndefined(templateStack) === 12) {
-                        result.endOfLineState = 6;
-                    }
-                }
-            }
-            function addResult(start, end, classification) {
-                if (classification === 8) {
-                    return;
-                }
-                if (start === 0 && offset > 0) {
-                    start += offset;
-                }
-                start -= offset;
-                end -= offset;
-                var length = end - start;
-                if (length > 0) {
-                    result.spans.push(start);
-                    result.spans.push(length);
-                    result.spans.push(classification);
-                }
-            }
-        }
-        function isBinaryExpressionOperatorToken(token) {
-            switch (token) {
-                case 37:
-                case 39:
-                case 40:
-                case 35:
-                case 36:
-                case 43:
-                case 44:
-                case 45:
-                case 25:
-                case 27:
-                case 28:
-                case 29:
-                case 91:
-                case 90:
-                case 116:
-                case 30:
-                case 31:
-                case 32:
-                case 33:
-                case 46:
-                case 48:
-                case 47:
-                case 51:
-                case 52:
-                case 67:
-                case 66:
-                case 68:
-                case 63:
-                case 64:
-                case 65:
-                case 57:
-                case 58:
-                case 59:
-                case 61:
-                case 62:
-                case 56:
-                case 24:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-        function isPrefixUnaryExpressionOperatorToken(token) {
-            switch (token) {
-                case 35:
-                case 36:
-                case 50:
-                case 49:
-                case 41:
-                case 42:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-        function isKeyword(token) {
-            return token >= 70 && token <= 138;
-        }
-        function classFromKind(token) {
-            if (isKeyword(token)) {
-                return 3;
-            }
-            else if (isBinaryExpressionOperatorToken(token) || isPrefixUnaryExpressionOperatorToken(token)) {
-                return 5;
-            }
-            else if (token >= 15 && token <= 68) {
-                return 10;
-            }
-            switch (token) {
-                case 8:
-                    return 4;
-                case 9:
-                case 166:
-                    return 6;
-                case 10:
-                    return 7;
-                case 7:
-                case 3:
-                case 2:
-                    return 1;
-                case 5:
-                case 4:
-                    return 8;
-                case 69:
-                default:
-                    if (ts.isTemplateLiteralKind(token)) {
-                        return 6;
-                    }
-                    return 2;
-            }
-        }
-        return {
-            getClassificationsForLine: getClassificationsForLine,
-            getEncodedLexicalClassifications: getEncodedLexicalClassifications
-        };
-    }
-    ts.createClassifier = createClassifier;
-    function getDefaultLibFilePath(options) {
-        if (typeof __dirname !== "undefined") {
-            return __dirname + ts.directorySeparator + ts.getDefaultLibFileName(options);
-        }
-        throw new Error("getDefaultLibFilePath is only supported when consumed as a node module. ");
-    }
-    ts.getDefaultLibFilePath = getDefaultLibFilePath;
-    function initializeServices() {
-        ts.objectAllocator = {
-            getNodeConstructor: function () { return NodeObject; },
-            getSourceFileConstructor: function () { return SourceFileObject; },
-            getSymbolConstructor: function () { return SymbolObject; },
-            getTypeConstructor: function () { return TypeObject; },
-            getSignatureConstructor: function () { return SignatureObject; }
-        };
-    }
-    initializeServices();
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var server;
-    (function (server) {
-        var spaceCache = [];
-        function generateSpaces(n) {
-            if (!spaceCache[n]) {
-                var strBuilder = "";
-                for (var i = 0; i < n; i++) {
-                    strBuilder += " ";
-                }
-                spaceCache[n] = strBuilder;
-            }
-            return spaceCache[n];
-        }
-        server.generateSpaces = generateSpaces;
-        function generateIndentString(n, editorOptions) {
-            if (editorOptions.ConvertTabsToSpaces) {
-                return generateSpaces(n);
-            }
-            else {
-                var result = "";
-                for (var i = 0; i < Math.floor(n / editorOptions.TabSize); i++) {
-                    result += "\t";
-                }
-                for (var i = 0; i < n % editorOptions.TabSize; i++) {
-                    result += " ";
-                }
-                return result;
-            }
-        }
-        server.generateIndentString = generateIndentString;
-        function compareNumber(a, b) {
-            if (a < b) {
-                return -1;
-            }
-            else if (a === b) {
-                return 0;
-            }
-            else
-                return 1;
-        }
-        function compareFileStart(a, b) {
-            if (a.file < b.file) {
-                return -1;
-            }
-            else if (a.file == b.file) {
-                var n = compareNumber(a.start.line, b.start.line);
-                if (n === 0) {
-                    return compareNumber(a.start.offset, b.start.offset);
-                }
-                else
-                    return n;
-            }
-            else {
-                return 1;
-            }
-        }
-        function formatDiag(fileName, project, diag) {
-            return {
-                start: project.compilerService.host.positionToLineOffset(fileName, diag.start),
-                end: project.compilerService.host.positionToLineOffset(fileName, diag.start + diag.length),
-                text: ts.flattenDiagnosticMessageText(diag.messageText, "\n")
-            };
-        }
-        function formatConfigFileDiag(diag) {
-            return {
-                start: undefined,
-                end: undefined,
-                text: ts.flattenDiagnosticMessageText(diag.messageText, "\n")
-            };
-        }
-        function allEditsBeforePos(edits, pos) {
-            for (var i = 0, len = edits.length; i < len; i++) {
-                if (ts.textSpanEnd(edits[i].span) >= pos) {
-                    return false;
-                }
-            }
-            return true;
-        }
-        var CommandNames;
-        (function (CommandNames) {
-            CommandNames.Brace = "brace";
-            CommandNames.Change = "change";
-            CommandNames.Close = "close";
-            CommandNames.Completions = "completions";
-            CommandNames.CompletionDetails = "completionEntryDetails";
-            CommandNames.Configure = "configure";
-            CommandNames.Definition = "definition";
-            CommandNames.Exit = "exit";
-            CommandNames.Format = "format";
-            CommandNames.Formatonkey = "formatonkey";
-            CommandNames.Geterr = "geterr";
-            CommandNames.GeterrForProject = "geterrForProject";
-            CommandNames.NavBar = "navbar";
-            CommandNames.Navto = "navto";
-            CommandNames.Occurrences = "occurrences";
-            CommandNames.DocumentHighlights = "documentHighlights";
-            CommandNames.Open = "open";
-            CommandNames.Quickinfo = "quickinfo";
-            CommandNames.References = "references";
-            CommandNames.Reload = "reload";
-            CommandNames.Rename = "rename";
-            CommandNames.Saveto = "saveto";
-            CommandNames.SignatureHelp = "signatureHelp";
-            CommandNames.TypeDefinition = "typeDefinition";
-            CommandNames.ProjectInfo = "projectInfo";
-            CommandNames.ReloadProjects = "reloadProjects";
-            CommandNames.Unknown = "unknown";
-        })(CommandNames = server.CommandNames || (server.CommandNames = {}));
-        var Errors;
-        (function (Errors) {
-            Errors.NoProject = new Error("No Project.");
-        })(Errors || (Errors = {}));
-        var Session = (function () {
-            function Session(host, byteLength, hrtime, logger) {
-                var _this = this;
-                this.host = host;
-                this.byteLength = byteLength;
-                this.hrtime = hrtime;
-                this.logger = logger;
-                this.changeSeq = 0;
-                this.handlers = (_a = {},
-                    _a[CommandNames.Exit] = function () {
-                        _this.exit();
-                        return { responseRequired: false };
-                    },
-                    _a[CommandNames.Definition] = function (request) {
-                        var defArgs = request.arguments;
-                        return { response: _this.getDefinition(defArgs.line, defArgs.offset, defArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.TypeDefinition] = function (request) {
-                        var defArgs = request.arguments;
-                        return { response: _this.getTypeDefinition(defArgs.line, defArgs.offset, defArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.References] = function (request) {
-                        var defArgs = request.arguments;
-                        return { response: _this.getReferences(defArgs.line, defArgs.offset, defArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.Rename] = function (request) {
-                        var renameArgs = request.arguments;
-                        return { response: _this.getRenameLocations(renameArgs.line, renameArgs.offset, renameArgs.file, renameArgs.findInComments, renameArgs.findInStrings), responseRequired: true };
-                    },
-                    _a[CommandNames.Open] = function (request) {
-                        var openArgs = request.arguments;
-                        var scriptKind;
-                        switch (openArgs.scriptKindName) {
-                            case "TS":
-                                scriptKind = 3;
-                                break;
-                            case "JS":
-                                scriptKind = 1;
-                                break;
-                            case "TSX":
-                                scriptKind = 4;
-                                break;
-                            case "JSX":
-                                scriptKind = 2;
-                                break;
-                        }
-                        _this.openClientFile(openArgs.file, openArgs.fileContent, scriptKind);
-                        return { responseRequired: false };
-                    },
-                    _a[CommandNames.Quickinfo] = function (request) {
-                        var quickinfoArgs = request.arguments;
-                        return { response: _this.getQuickInfo(quickinfoArgs.line, quickinfoArgs.offset, quickinfoArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.Format] = function (request) {
-                        var formatArgs = request.arguments;
-                        return { response: _this.getFormattingEditsForRange(formatArgs.line, formatArgs.offset, formatArgs.endLine, formatArgs.endOffset, formatArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.Formatonkey] = function (request) {
-                        var formatOnKeyArgs = request.arguments;
-                        return { response: _this.getFormattingEditsAfterKeystroke(formatOnKeyArgs.line, formatOnKeyArgs.offset, formatOnKeyArgs.key, formatOnKeyArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.Completions] = function (request) {
-                        var completionsArgs = request.arguments;
-                        return { response: _this.getCompletions(completionsArgs.line, completionsArgs.offset, completionsArgs.prefix, completionsArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.CompletionDetails] = function (request) {
-                        var completionDetailsArgs = request.arguments;
-                        return {
-                            response: _this.getCompletionEntryDetails(completionDetailsArgs.line, completionDetailsArgs.offset, completionDetailsArgs.entryNames, completionDetailsArgs.file), responseRequired: true
-                        };
-                    },
-                    _a[CommandNames.SignatureHelp] = function (request) {
-                        var signatureHelpArgs = request.arguments;
-                        return { response: _this.getSignatureHelpItems(signatureHelpArgs.line, signatureHelpArgs.offset, signatureHelpArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.Geterr] = function (request) {
-                        var geterrArgs = request.arguments;
-                        return { response: _this.getDiagnostics(geterrArgs.delay, geterrArgs.files), responseRequired: false };
-                    },
-                    _a[CommandNames.GeterrForProject] = function (request) {
-                        var _a = request.arguments, file = _a.file, delay = _a.delay;
-                        return { response: _this.getDiagnosticsForProject(delay, file), responseRequired: false };
-                    },
-                    _a[CommandNames.Change] = function (request) {
-                        var changeArgs = request.arguments;
-                        _this.change(changeArgs.line, changeArgs.offset, changeArgs.endLine, changeArgs.endOffset, changeArgs.insertString, changeArgs.file);
-                        return { responseRequired: false };
-                    },
-                    _a[CommandNames.Configure] = function (request) {
-                        var configureArgs = request.arguments;
-                        _this.projectService.setHostConfiguration(configureArgs);
-                        _this.output(undefined, CommandNames.Configure, request.seq);
-                        return { responseRequired: false };
-                    },
-                    _a[CommandNames.Reload] = function (request) {
-                        var reloadArgs = request.arguments;
-                        _this.reload(reloadArgs.file, reloadArgs.tmpfile, request.seq);
-                        return { response: { reloadFinished: true }, responseRequired: true };
-                    },
-                    _a[CommandNames.Saveto] = function (request) {
-                        var savetoArgs = request.arguments;
-                        _this.saveToTmp(savetoArgs.file, savetoArgs.tmpfile);
-                        return { responseRequired: false };
-                    },
-                    _a[CommandNames.Close] = function (request) {
-                        var closeArgs = request.arguments;
-                        _this.closeClientFile(closeArgs.file);
-                        return { responseRequired: false };
-                    },
-                    _a[CommandNames.Navto] = function (request) {
-                        var navtoArgs = request.arguments;
-                        return { response: _this.getNavigateToItems(navtoArgs.searchValue, navtoArgs.file, navtoArgs.maxResultCount), responseRequired: true };
-                    },
-                    _a[CommandNames.Brace] = function (request) {
-                        var braceArguments = request.arguments;
-                        return { response: _this.getBraceMatching(braceArguments.line, braceArguments.offset, braceArguments.file), responseRequired: true };
-                    },
-                    _a[CommandNames.NavBar] = function (request) {
-                        var navBarArgs = request.arguments;
-                        return { response: _this.getNavigationBarItems(navBarArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.Occurrences] = function (request) {
-                        var _a = request.arguments, line = _a.line, offset = _a.offset, fileName = _a.file;
-                        return { response: _this.getOccurrences(line, offset, fileName), responseRequired: true };
-                    },
-                    _a[CommandNames.DocumentHighlights] = function (request) {
-                        var _a = request.arguments, line = _a.line, offset = _a.offset, fileName = _a.file, filesToSearch = _a.filesToSearch;
-                        return { response: _this.getDocumentHighlights(line, offset, fileName, filesToSearch), responseRequired: true };
-                    },
-                    _a[CommandNames.ProjectInfo] = function (request) {
-                        var _a = request.arguments, file = _a.file, needFileNameList = _a.needFileNameList;
-                        return { response: _this.getProjectInfo(file, needFileNameList), responseRequired: true };
-                    },
-                    _a[CommandNames.ReloadProjects] = function (request) {
-                        _this.reloadProjects();
-                        return { responseRequired: false };
-                    },
-                    _a
-                );
-                this.projectService =
-                    new server.ProjectService(host, logger, function (eventName, project, fileName) {
-                        _this.handleEvent(eventName, project, fileName);
-                    });
-                var _a;
-            }
-            Session.prototype.handleEvent = function (eventName, project, fileName) {
-                var _this = this;
-                if (eventName == "context") {
-                    this.projectService.log("got context event, updating diagnostics for" + fileName, "Info");
-                    this.updateErrorCheck([{ fileName: fileName, project: project }], this.changeSeq, function (n) { return n === _this.changeSeq; }, 100);
-                }
-            };
-            Session.prototype.logError = function (err, cmd) {
-                var typedErr = err;
-                var msg = "Exception on executing command " + cmd;
-                if (typedErr.message) {
-                    msg += ":\n" + typedErr.message;
-                    if (typedErr.stack) {
-                        msg += "\n" + typedErr.stack;
-                    }
-                }
-                this.projectService.log(msg);
-            };
-            Session.prototype.sendLineToClient = function (line) {
-                this.host.write(line + this.host.newLine);
-            };
-            Session.prototype.send = function (msg) {
-                var json = JSON.stringify(msg);
-                if (this.logger.isVerbose()) {
-                    this.logger.info(msg.type + ": " + json);
-                }
-                this.sendLineToClient("Content-Length: " + (1 + this.byteLength(json, "utf8")) +
-                    "\r\n\r\n" + json);
-            };
-            Session.prototype.configFileDiagnosticEvent = function (triggerFile, configFile, diagnostics) {
-                var bakedDiags = ts.map(diagnostics, formatConfigFileDiag);
-                var ev = {
-                    seq: 0,
-                    type: "event",
-                    event: "configFileDiag",
-                    body: {
-                        triggerFile: triggerFile,
-                        configFile: configFile,
-                        diagnostics: bakedDiags
-                    }
-                };
-                this.send(ev);
-            };
-            Session.prototype.event = function (info, eventName) {
-                var ev = {
-                    seq: 0,
-                    type: "event",
-                    event: eventName,
-                    body: info
-                };
-                this.send(ev);
-            };
-            Session.prototype.response = function (info, cmdName, reqSeq, errorMsg) {
-                if (reqSeq === void 0) { reqSeq = 0; }
-                var res = {
-                    seq: 0,
-                    type: "response",
-                    command: cmdName,
-                    request_seq: reqSeq,
-                    success: !errorMsg
-                };
-                if (!errorMsg) {
-                    res.body = info;
-                }
-                else {
-                    res.message = errorMsg;
-                }
-                this.send(res);
-            };
-            Session.prototype.output = function (body, commandName, requestSequence, errorMessage) {
-                if (requestSequence === void 0) { requestSequence = 0; }
-                this.response(body, commandName, requestSequence, errorMessage);
-            };
-            Session.prototype.semanticCheck = function (file, project) {
-                try {
-                    var diags = project.compilerService.languageService.getSemanticDiagnostics(file);
-                    if (diags) {
-                        var bakedDiags = diags.map(function (diag) { return formatDiag(file, project, diag); });
-                        this.event({ file: file, diagnostics: bakedDiags }, "semanticDiag");
-                    }
-                }
-                catch (err) {
-                    this.logError(err, "semantic check");
-                }
-            };
-            Session.prototype.syntacticCheck = function (file, project) {
-                try {
-                    var diags = project.compilerService.languageService.getSyntacticDiagnostics(file);
-                    if (diags) {
-                        var bakedDiags = diags.map(function (diag) { return formatDiag(file, project, diag); });
-                        this.event({ file: file, diagnostics: bakedDiags }, "syntaxDiag");
-                    }
-                }
-                catch (err) {
-                    this.logError(err, "syntactic check");
-                }
-            };
-            Session.prototype.reloadProjects = function () {
-                this.projectService.reloadProjects();
-            };
-            Session.prototype.updateProjectStructure = function (seq, matchSeq, ms) {
-                var _this = this;
-                if (ms === void 0) { ms = 1500; }
-                setTimeout(function () {
-                    if (matchSeq(seq)) {
-                        _this.projectService.updateProjectStructure();
-                    }
-                }, ms);
-            };
-            Session.prototype.updateErrorCheck = function (checkList, seq, matchSeq, ms, followMs, requireOpen) {
-                var _this = this;
-                if (ms === void 0) { ms = 1500; }
-                if (followMs === void 0) { followMs = 200; }
-                if (requireOpen === void 0) { requireOpen = true; }
-                if (followMs > ms) {
-                    followMs = ms;
-                }
-                if (this.errorTimer) {
-                    clearTimeout(this.errorTimer);
-                }
-                if (this.immediateId) {
-                    clearImmediate(this.immediateId);
-                    this.immediateId = undefined;
-                }
-                var index = 0;
-                var checkOne = function () {
-                    if (matchSeq(seq)) {
-                        var checkSpec_1 = checkList[index];
-                        index++;
-                        if (checkSpec_1.project.getSourceFileFromName(checkSpec_1.fileName, requireOpen)) {
-                            _this.syntacticCheck(checkSpec_1.fileName, checkSpec_1.project);
-                            _this.immediateId = setImmediate(function () {
-                                _this.semanticCheck(checkSpec_1.fileName, checkSpec_1.project);
-                                _this.immediateId = undefined;
-                                if (checkList.length > index) {
-                                    _this.errorTimer = setTimeout(checkOne, followMs);
-                                }
-                                else {
-                                    _this.errorTimer = undefined;
-                                }
-                            });
-                        }
-                    }
-                };
-                if ((checkList.length > index) && (matchSeq(seq))) {
-                    this.errorTimer = setTimeout(checkOne, ms);
-                }
-            };
-            Session.prototype.getDefinition = function (line, offset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var definitions = compilerService.languageService.getDefinitionAtPosition(file, position);
-                if (!definitions) {
-                    return undefined;
-                }
-                return definitions.map(function (def) { return ({
-                    file: def.fileName,
-                    start: compilerService.host.positionToLineOffset(def.fileName, def.textSpan.start),
-                    end: compilerService.host.positionToLineOffset(def.fileName, ts.textSpanEnd(def.textSpan))
-                }); });
-            };
-            Session.prototype.getTypeDefinition = function (line, offset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var definitions = compilerService.languageService.getTypeDefinitionAtPosition(file, position);
-                if (!definitions) {
-                    return undefined;
-                }
-                return definitions.map(function (def) { return ({
-                    file: def.fileName,
-                    start: compilerService.host.positionToLineOffset(def.fileName, def.textSpan.start),
-                    end: compilerService.host.positionToLineOffset(def.fileName, ts.textSpanEnd(def.textSpan))
-                }); });
-            };
-            Session.prototype.getOccurrences = function (line, offset, fileName) {
-                fileName = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(fileName);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(fileName, line, offset);
-                var occurrences = compilerService.languageService.getOccurrencesAtPosition(fileName, position);
-                if (!occurrences) {
-                    return undefined;
-                }
-                return occurrences.map(function (occurrence) {
-                    var fileName = occurrence.fileName, isWriteAccess = occurrence.isWriteAccess, textSpan = occurrence.textSpan;
-                    var start = compilerService.host.positionToLineOffset(fileName, textSpan.start);
-                    var end = compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(textSpan));
-                    return {
-                        start: start,
-                        end: end,
-                        file: fileName,
-                        isWriteAccess: isWriteAccess
-                    };
-                });
-            };
-            Session.prototype.getDocumentHighlights = function (line, offset, fileName, filesToSearch) {
-                fileName = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(fileName);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(fileName, line, offset);
-                var documentHighlights = compilerService.languageService.getDocumentHighlights(fileName, position, filesToSearch);
-                if (!documentHighlights) {
-                    return undefined;
-                }
-                return documentHighlights.map(convertToDocumentHighlightsItem);
-                function convertToDocumentHighlightsItem(documentHighlights) {
-                    var fileName = documentHighlights.fileName, highlightSpans = documentHighlights.highlightSpans;
-                    return {
-                        file: fileName,
-                        highlightSpans: highlightSpans.map(convertHighlightSpan)
-                    };
-                    function convertHighlightSpan(highlightSpan) {
-                        var textSpan = highlightSpan.textSpan, kind = highlightSpan.kind;
-                        var start = compilerService.host.positionToLineOffset(fileName, textSpan.start);
-                        var end = compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(textSpan));
-                        return { start: start, end: end, kind: kind };
-                    }
-                }
-            };
-            Session.prototype.getProjectInfo = function (fileName, needFileNameList) {
-                fileName = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(fileName);
-                var projectInfo = {
-                    configFileName: project.projectFilename
-                };
-                if (needFileNameList) {
-                    projectInfo.fileNames = project.getFileNames();
-                }
-                return projectInfo;
-            };
-            Session.prototype.getRenameLocations = function (line, offset, fileName, findInComments, findInStrings) {
-                var file = ts.normalizePath(fileName);
-                var info = this.projectService.getScriptInfo(file);
-                var projects = this.projectService.findReferencingProjects(info);
-                if (!projects.length) {
-                    throw Errors.NoProject;
-                }
-                var defaultProject = projects[0];
-                var defaultProjectCompilerService = defaultProject.compilerService;
-                var position = defaultProjectCompilerService.host.lineOffsetToPosition(file, line, offset);
-                var renameInfo = defaultProjectCompilerService.languageService.getRenameInfo(file, position);
-                if (!renameInfo) {
-                    return undefined;
-                }
-                if (!renameInfo.canRename) {
-                    return {
-                        info: renameInfo,
-                        locs: []
-                    };
-                }
-                var fileSpans = server.combineProjectOutput(projects, function (project) {
-                    var compilerService = project.compilerService;
-                    var renameLocations = compilerService.languageService.findRenameLocations(file, position, findInStrings, findInComments);
-                    if (!renameLocations) {
-                        return [];
-                    }
-                    return renameLocations.map(function (location) { return ({
-                        file: location.fileName,
-                        start: compilerService.host.positionToLineOffset(location.fileName, location.textSpan.start),
-                        end: compilerService.host.positionToLineOffset(location.fileName, ts.textSpanEnd(location.textSpan))
-                    }); });
-                }, compareRenameLocation, function (a, b) { return a.file === b.file && a.start.line === b.start.line && a.start.offset === b.start.offset; });
-                var locs = fileSpans.reduce(function (accum, cur) {
-                    var curFileAccum;
-                    if (accum.length > 0) {
-                        curFileAccum = accum[accum.length - 1];
-                        if (curFileAccum.file !== cur.file) {
-                            curFileAccum = undefined;
-                        }
-                    }
-                    if (!curFileAccum) {
-                        curFileAccum = { file: cur.file, locs: [] };
-                        accum.push(curFileAccum);
-                    }
-                    curFileAccum.locs.push({ start: cur.start, end: cur.end });
-                    return accum;
-                }, []);
-                return { info: renameInfo, locs: locs };
-                function compareRenameLocation(a, b) {
-                    if (a.file < b.file) {
-                        return -1;
-                    }
-                    else if (a.file > b.file) {
-                        return 1;
-                    }
-                    else {
-                        if (a.start.line < b.start.line) {
-                            return 1;
-                        }
-                        else if (a.start.line > b.start.line) {
-                            return -1;
-                        }
-                        else {
-                            return b.start.offset - a.start.offset;
-                        }
-                    }
-                }
-            };
-            Session.prototype.getReferences = function (line, offset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var info = this.projectService.getScriptInfo(file);
-                var projects = this.projectService.findReferencingProjects(info);
-                if (!projects.length) {
-                    throw Errors.NoProject;
-                }
-                var defaultProject = projects[0];
-                var position = defaultProject.compilerService.host.lineOffsetToPosition(file, line, offset);
-                var nameInfo = defaultProject.compilerService.languageService.getQuickInfoAtPosition(file, position);
-                if (!nameInfo) {
-                    return undefined;
-                }
-                var displayString = ts.displayPartsToString(nameInfo.displayParts);
-                var nameSpan = nameInfo.textSpan;
-                var nameColStart = defaultProject.compilerService.host.positionToLineOffset(file, nameSpan.start).offset;
-                var nameText = defaultProject.compilerService.host.getScriptSnapshot(file).getText(nameSpan.start, ts.textSpanEnd(nameSpan));
-                var refs = server.combineProjectOutput(projects, function (project) {
-                    var compilerService = project.compilerService;
-                    var references = compilerService.languageService.getReferencesAtPosition(file, position);
-                    if (!references) {
-                        return [];
-                    }
-                    return references.map(function (ref) {
-                        var start = compilerService.host.positionToLineOffset(ref.fileName, ref.textSpan.start);
-                        var refLineSpan = compilerService.host.lineToTextSpan(ref.fileName, start.line - 1);
-                        var snap = compilerService.host.getScriptSnapshot(ref.fileName);
-                        var lineText = snap.getText(refLineSpan.start, ts.textSpanEnd(refLineSpan)).replace(/\r|\n/g, "");
-                        return {
-                            file: ref.fileName,
-                            start: start,
-                            lineText: lineText,
-                            end: compilerService.host.positionToLineOffset(ref.fileName, ts.textSpanEnd(ref.textSpan)),
-                            isWriteAccess: ref.isWriteAccess
-                        };
-                    });
-                }, compareFileStart, areReferencesResponseItemsForTheSameLocation);
-                return {
-                    refs: refs,
-                    symbolName: nameText,
-                    symbolStartOffset: nameColStart,
-                    symbolDisplayString: displayString
-                };
-                function areReferencesResponseItemsForTheSameLocation(a, b) {
-                    if (a && b) {
-                        return a.file === b.file &&
-                            a.start === b.start &&
-                            a.end === b.end;
-                    }
-                    return false;
-                }
-            };
-            Session.prototype.openClientFile = function (fileName, fileContent, scriptKind) {
-                var file = ts.normalizePath(fileName);
-                var _a = this.projectService.openClientFile(file, fileContent, scriptKind), configFileName = _a.configFileName, configFileErrors = _a.configFileErrors;
-                if (configFileErrors) {
-                    this.configFileDiagnosticEvent(fileName, configFileName, configFileErrors);
-                }
-            };
-            Session.prototype.getQuickInfo = function (line, offset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var quickInfo = compilerService.languageService.getQuickInfoAtPosition(file, position);
-                if (!quickInfo) {
-                    return undefined;
-                }
-                var displayString = ts.displayPartsToString(quickInfo.displayParts);
-                var docString = ts.displayPartsToString(quickInfo.documentation);
-                return {
-                    kind: quickInfo.kind,
-                    kindModifiers: quickInfo.kindModifiers,
-                    start: compilerService.host.positionToLineOffset(file, quickInfo.textSpan.start),
-                    end: compilerService.host.positionToLineOffset(file, ts.textSpanEnd(quickInfo.textSpan)),
-                    displayString: displayString,
-                    documentation: docString
-                };
-            };
-            Session.prototype.getFormattingEditsForRange = function (line, offset, endLine, endOffset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var startPosition = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var endPosition = compilerService.host.lineOffsetToPosition(file, endLine, endOffset);
-                var edits = compilerService.languageService.getFormattingEditsForRange(file, startPosition, endPosition, this.projectService.getFormatCodeOptions(file));
-                if (!edits) {
-                    return undefined;
-                }
-                return edits.map(function (edit) {
-                    return {
-                        start: compilerService.host.positionToLineOffset(file, edit.span.start),
-                        end: compilerService.host.positionToLineOffset(file, ts.textSpanEnd(edit.span)),
-                        newText: edit.newText ? edit.newText : ""
-                    };
-                });
-            };
-            Session.prototype.getFormattingEditsAfterKeystroke = function (line, offset, key, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var formatOptions = this.projectService.getFormatCodeOptions(file);
-                var edits = compilerService.languageService.getFormattingEditsAfterKeystroke(file, position, key, formatOptions);
-                if ((key == "\n") && ((!edits) || (edits.length === 0) || allEditsBeforePos(edits, position))) {
-                    var scriptInfo = compilerService.host.getScriptInfo(file);
-                    if (scriptInfo) {
-                        var lineInfo = scriptInfo.getLineInfo(line);
-                        if (lineInfo && (lineInfo.leaf) && (lineInfo.leaf.text)) {
-                            var lineText = lineInfo.leaf.text;
-                            if (lineText.search("\\S") < 0) {
-                                var editorOptions = {
-                                    IndentSize: formatOptions.IndentSize,
-                                    TabSize: formatOptions.TabSize,
-                                    NewLineCharacter: formatOptions.NewLineCharacter,
-                                    ConvertTabsToSpaces: formatOptions.ConvertTabsToSpaces,
-                                    IndentStyle: ts.IndentStyle.Smart
-                                };
-                                var preferredIndent = compilerService.languageService.getIndentationAtPosition(file, position, editorOptions);
-                                var hasIndent = 0;
-                                var i = void 0, len = void 0;
-                                for (i = 0, len = lineText.length; i < len; i++) {
-                                    if (lineText.charAt(i) == " ") {
-                                        hasIndent++;
-                                    }
-                                    else if (lineText.charAt(i) == "\t") {
-                                        hasIndent += editorOptions.TabSize;
-                                    }
-                                    else {
-                                        break;
-                                    }
-                                }
-                                if (preferredIndent !== hasIndent) {
-                                    var firstNoWhiteSpacePosition = lineInfo.offset + i;
-                                    edits.push({
-                                        span: ts.createTextSpanFromBounds(lineInfo.offset, firstNoWhiteSpacePosition),
-                                        newText: generateIndentString(preferredIndent, editorOptions)
-                                    });
-                                }
-                            }
-                        }
-                    }
-                }
-                if (!edits) {
-                    return undefined;
-                }
-                return edits.map(function (edit) {
-                    return {
-                        start: compilerService.host.positionToLineOffset(file, edit.span.start),
-                        end: compilerService.host.positionToLineOffset(file, ts.textSpanEnd(edit.span)),
-                        newText: edit.newText ? edit.newText : ""
-                    };
-                });
-            };
-            Session.prototype.getCompletions = function (line, offset, prefix, fileName) {
-                if (!prefix) {
-                    prefix = "";
-                }
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var completions = compilerService.languageService.getCompletionsAtPosition(file, position);
-                if (!completions) {
-                    return undefined;
-                }
-                return completions.entries.reduce(function (result, entry) {
-                    if (completions.isMemberCompletion || (entry.name.toLowerCase().indexOf(prefix.toLowerCase()) === 0)) {
-                        result.push(entry);
-                    }
-                    return result;
-                }, []).sort(function (a, b) { return a.name.localeCompare(b.name); });
-            };
-            Session.prototype.getCompletionEntryDetails = function (line, offset, entryNames, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                return entryNames.reduce(function (accum, entryName) {
-                    var details = compilerService.languageService.getCompletionEntryDetails(file, position, entryName);
-                    if (details) {
-                        accum.push(details);
-                    }
-                    return accum;
-                }, []);
-            };
-            Session.prototype.getSignatureHelpItems = function (line, offset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var helpItems = compilerService.languageService.getSignatureHelpItems(file, position);
-                if (!helpItems) {
-                    return undefined;
-                }
-                var span = helpItems.applicableSpan;
-                var result = {
-                    items: helpItems.items,
-                    applicableSpan: {
-                        start: compilerService.host.positionToLineOffset(file, span.start),
-                        end: compilerService.host.positionToLineOffset(file, span.start + span.length)
-                    },
-                    selectedItemIndex: helpItems.selectedItemIndex,
-                    argumentIndex: helpItems.argumentIndex,
-                    argumentCount: helpItems.argumentCount
-                };
-                return result;
-            };
-            Session.prototype.getDiagnostics = function (delay, fileNames) {
-                var _this = this;
-                var checkList = fileNames.reduce(function (accum, fileName) {
-                    fileName = ts.normalizePath(fileName);
-                    var project = _this.projectService.getProjectForFile(fileName);
-                    if (project) {
-                        accum.push({ fileName: fileName, project: project });
-                    }
-                    return accum;
-                }, []);
-                if (checkList.length > 0) {
-                    this.updateErrorCheck(checkList, this.changeSeq, function (n) { return n === _this.changeSeq; }, delay);
-                }
-            };
-            Session.prototype.change = function (line, offset, endLine, endOffset, insertString, fileName) {
-                var _this = this;
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (project) {
-                    var compilerService = project.compilerService;
-                    var start = compilerService.host.lineOffsetToPosition(file, line, offset);
-                    var end = compilerService.host.lineOffsetToPosition(file, endLine, endOffset);
-                    if (start >= 0) {
-                        compilerService.host.editScript(file, start, end, insertString);
-                        this.changeSeq++;
-                    }
-                    this.updateProjectStructure(this.changeSeq, function (n) { return n === _this.changeSeq; });
-                }
-            };
-            Session.prototype.reload = function (fileName, tempFileName, reqSeq) {
-                var _this = this;
-                if (reqSeq === void 0) { reqSeq = 0; }
-                var file = ts.normalizePath(fileName);
-                var tmpfile = ts.normalizePath(tempFileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (project) {
-                    this.changeSeq++;
-                    project.compilerService.host.reloadScript(file, tmpfile, function () {
-                        _this.output(undefined, CommandNames.Reload, reqSeq);
-                    });
-                }
-            };
-            Session.prototype.saveToTmp = function (fileName, tempFileName) {
-                var file = ts.normalizePath(fileName);
-                var tmpfile = ts.normalizePath(tempFileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (project) {
-                    project.compilerService.host.saveTo(file, tmpfile);
-                }
-            };
-            Session.prototype.closeClientFile = function (fileName) {
-                if (!fileName) {
-                    return;
-                }
-                var file = ts.normalizePath(fileName);
-                this.projectService.closeClientFile(file);
-            };
-            Session.prototype.decorateNavigationBarItem = function (project, fileName, items) {
-                var _this = this;
-                if (!items) {
-                    return undefined;
-                }
-                var compilerService = project.compilerService;
-                return items.map(function (item) { return ({
-                    text: item.text,
-                    kind: item.kind,
-                    kindModifiers: item.kindModifiers,
-                    spans: item.spans.map(function (span) { return ({
-                        start: compilerService.host.positionToLineOffset(fileName, span.start),
-                        end: compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(span))
-                    }); }),
-                    childItems: _this.decorateNavigationBarItem(project, fileName, item.childItems)
-                }); });
-            };
-            Session.prototype.getNavigationBarItems = function (fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var items = compilerService.languageService.getNavigationBarItems(file);
-                if (!items) {
-                    return undefined;
-                }
-                return this.decorateNavigationBarItem(project, fileName, items);
-            };
-            Session.prototype.getNavigateToItems = function (searchValue, fileName, maxResultCount) {
-                var file = ts.normalizePath(fileName);
-                var info = this.projectService.getScriptInfo(file);
-                var projects = this.projectService.findReferencingProjects(info);
-                var defaultProject = projects[0];
-                if (!defaultProject) {
-                    throw Errors.NoProject;
-                }
-                var allNavToItems = server.combineProjectOutput(projects, function (project) {
-                    var compilerService = project.compilerService;
-                    var navItems = compilerService.languageService.getNavigateToItems(searchValue, maxResultCount);
-                    if (!navItems) {
-                        return [];
-                    }
-                    return navItems.map(function (navItem) {
-                        var start = compilerService.host.positionToLineOffset(navItem.fileName, navItem.textSpan.start);
-                        var end = compilerService.host.positionToLineOffset(navItem.fileName, ts.textSpanEnd(navItem.textSpan));
-                        var bakedItem = {
-                            name: navItem.name,
-                            kind: navItem.kind,
-                            file: navItem.fileName,
-                            start: start,
-                            end: end
-                        };
-                        if (navItem.kindModifiers && (navItem.kindModifiers !== "")) {
-                            bakedItem.kindModifiers = navItem.kindModifiers;
-                        }
-                        if (navItem.matchKind !== "none") {
-                            bakedItem.matchKind = navItem.matchKind;
-                        }
-                        if (navItem.containerName && (navItem.containerName.length > 0)) {
-                            bakedItem.containerName = navItem.containerName;
-                        }
-                        if (navItem.containerKind && (navItem.containerKind.length > 0)) {
-                            bakedItem.containerKind = navItem.containerKind;
-                        }
-                        return bakedItem;
-                    });
-                }, undefined, areNavToItemsForTheSameLocation);
-                return allNavToItems;
-                function areNavToItemsForTheSameLocation(a, b) {
-                    if (a && b) {
-                        return a.file === b.file &&
-                            a.start === b.start &&
-                            a.end === b.end;
-                    }
-                    return false;
-                }
-            };
-            Session.prototype.getBraceMatching = function (line, offset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var spans = compilerService.languageService.getBraceMatchingAtPosition(file, position);
-                if (!spans) {
-                    return undefined;
-                }
-                return spans.map(function (span) { return ({
-                    start: compilerService.host.positionToLineOffset(file, span.start),
-                    end: compilerService.host.positionToLineOffset(file, span.start + span.length)
-                }); });
-            };
-            Session.prototype.getDiagnosticsForProject = function (delay, fileName) {
-                var _this = this;
-                var fileNames = this.getProjectInfo(fileName, true).fileNames;
-                var fileNamesInProject = fileNames.filter(function (value, index, array) { return value.indexOf("lib.d.ts") < 0; });
-                var highPriorityFiles = [];
-                var mediumPriorityFiles = [];
-                var lowPriorityFiles = [];
-                var veryLowPriorityFiles = [];
-                var normalizedFileName = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(normalizedFileName);
-                for (var _i = 0, fileNamesInProject_1 = fileNamesInProject; _i < fileNamesInProject_1.length; _i++) {
-                    var fileNameInProject = fileNamesInProject_1[_i];
-                    if (this.getCanonicalFileName(fileNameInProject) == this.getCanonicalFileName(fileName))
-                        highPriorityFiles.push(fileNameInProject);
-                    else {
-                        var info = this.projectService.getScriptInfo(fileNameInProject);
-                        if (!info.isOpen) {
-                            if (fileNameInProject.indexOf(".d.ts") > 0)
-                                veryLowPriorityFiles.push(fileNameInProject);
-                            else
-                                lowPriorityFiles.push(fileNameInProject);
-                        }
-                        else
-                            mediumPriorityFiles.push(fileNameInProject);
-                    }
-                }
-                fileNamesInProject = highPriorityFiles.concat(mediumPriorityFiles).concat(lowPriorityFiles).concat(veryLowPriorityFiles);
-                if (fileNamesInProject.length > 0) {
-                    var checkList = fileNamesInProject.map(function (fileName) {
-                        var normalizedFileName = ts.normalizePath(fileName);
-                        return { fileName: normalizedFileName, project: project };
-                    });
-                    this.updateErrorCheck(checkList, this.changeSeq, function (n) { return n == _this.changeSeq; }, delay, 200, false);
-                }
-            };
-            Session.prototype.getCanonicalFileName = function (fileName) {
-                var name = this.host.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
-                return ts.normalizePath(name);
-            };
-            Session.prototype.exit = function () {
-            };
-            Session.prototype.addProtocolHandler = function (command, handler) {
-                if (this.handlers[command]) {
-                    throw new Error("Protocol handler already exists for command \"" + command + "\"");
-                }
-                this.handlers[command] = handler;
-            };
-            Session.prototype.executeCommand = function (request) {
-                var handler = this.handlers[request.command];
-                if (handler) {
-                    return handler(request);
-                }
-                else {
-                    this.projectService.log("Unrecognized JSON command: " + JSON.stringify(request));
-                    this.output(undefined, CommandNames.Unknown, request.seq, "Unrecognized JSON command: " + request.command);
-                    return { responseRequired: false };
-                }
-            };
-            Session.prototype.onMessage = function (message) {
-                var start;
-                if (this.logger.isVerbose()) {
-                    this.logger.info("request: " + message);
-                    start = this.hrtime();
-                }
-                var request;
-                try {
-                    request = JSON.parse(message);
-                    var _a = this.executeCommand(request), response = _a.response, responseRequired = _a.responseRequired;
-                    if (this.logger.isVerbose()) {
-                        var elapsed = this.hrtime(start);
-                        var seconds = elapsed[0];
-                        var nanoseconds = elapsed[1];
-                        var elapsedMs = ((1e9 * seconds) + nanoseconds) / 1000000.0;
-                        var leader = "Elapsed time (in milliseconds)";
-                        if (!responseRequired) {
-                            leader = "Async elapsed time (in milliseconds)";
-                        }
-                        this.logger.msg(leader + ": " + elapsedMs.toFixed(4).toString(), "Perf");
-                    }
-                    if (response) {
-                        this.output(response, request.command, request.seq);
-                    }
-                    else if (responseRequired) {
-                        this.output(undefined, request.command, request.seq, "No content available.");
-                    }
-                }
-                catch (err) {
-                    if (err instanceof ts.OperationCanceledException) {
-                    }
-                    this.logError(err, message);
-                    this.output(undefined, request ? request.command : CommandNames.Unknown, request ? request.seq : 0, "Error processing request. " + err.message);
-                }
-            };
-            return Session;
-        }());
-        server.Session = Session;
-    })(server = ts.server || (ts.server = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var server;
-    (function (server) {
-        var lineCollectionCapacity = 4;
-        function mergeFormatOptions(formatCodeOptions, formatOptions) {
-            var hasOwnProperty = Object.prototype.hasOwnProperty;
-            Object.keys(formatOptions).forEach(function (key) {
-                var codeKey = key.charAt(0).toUpperCase() + key.substring(1);
-                if (hasOwnProperty.call(formatCodeOptions, codeKey)) {
-                    formatCodeOptions[codeKey] = formatOptions[key];
-                }
-            });
-        }
-        var ScriptInfo = (function () {
-            function ScriptInfo(host, fileName, content, isOpen) {
-                if (isOpen === void 0) { isOpen = false; }
-                this.host = host;
-                this.fileName = fileName;
-                this.content = content;
-                this.isOpen = isOpen;
-                this.children = [];
-                this.formatCodeOptions = ts.clone(CompilerService.getDefaultFormatCodeOptions(this.host));
-                this.path = ts.toPath(fileName, host.getCurrentDirectory(), ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames));
-                this.svc = ScriptVersionCache.fromString(host, content);
-            }
-            ScriptInfo.prototype.setFormatOptions = function (formatOptions) {
-                if (formatOptions) {
-                    mergeFormatOptions(this.formatCodeOptions, formatOptions);
-                }
-            };
-            ScriptInfo.prototype.close = function () {
-                this.isOpen = false;
-            };
-            ScriptInfo.prototype.addChild = function (childInfo) {
-                this.children.push(childInfo);
-            };
-            ScriptInfo.prototype.snap = function () {
-                return this.svc.getSnapshot();
-            };
-            ScriptInfo.prototype.getText = function () {
-                var snap = this.snap();
-                return snap.getText(0, snap.getLength());
-            };
-            ScriptInfo.prototype.getLineInfo = function (line) {
-                var snap = this.snap();
-                return snap.index.lineNumberToInfo(line);
-            };
-            ScriptInfo.prototype.editContent = function (start, end, newText) {
-                this.svc.edit(start, end - start, newText);
-            };
-            ScriptInfo.prototype.getTextChangeRangeBetweenVersions = function (startVersion, endVersion) {
-                return this.svc.getTextChangesBetweenVersions(startVersion, endVersion);
-            };
-            ScriptInfo.prototype.getChangeRange = function (oldSnapshot) {
-                return this.snap().getChangeRange(oldSnapshot);
-            };
-            return ScriptInfo;
-        }());
-        server.ScriptInfo = ScriptInfo;
-        var LSHost = (function () {
-            function LSHost(host, project) {
-                var _this = this;
-                this.host = host;
-                this.project = project;
-                this.roots = [];
-                this.getCanonicalFileName = ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames);
-                this.resolvedModuleNames = ts.createFileMap();
-                this.resolvedTypeReferenceDirectives = ts.createFileMap();
-                this.filenameToScript = ts.createFileMap();
-                this.moduleResolutionHost = {
-                    fileExists: function (fileName) { return _this.fileExists(fileName); },
-                    readFile: function (fileName) { return _this.host.readFile(fileName); },
-                    directoryExists: function (directoryName) { return _this.host.directoryExists(directoryName); }
-                };
-            }
-            LSHost.prototype.resolveNamesWithLocalCache = function (names, containingFile, cache, loader, getResult) {
-                var path = ts.toPath(containingFile, this.host.getCurrentDirectory(), this.getCanonicalFileName);
-                var currentResolutionsInFile = cache.get(path);
-                var newResolutions = {};
-                var resolvedModules = [];
-                var compilerOptions = this.getCompilationSettings();
-                for (var _i = 0, names_2 = names; _i < names_2.length; _i++) {
-                    var name_41 = names_2[_i];
-                    var resolution = ts.lookUp(newResolutions, name_41);
-                    if (!resolution) {
-                        var existingResolution = currentResolutionsInFile && ts.lookUp(currentResolutionsInFile, name_41);
-                        if (moduleResolutionIsValid(existingResolution)) {
-                            resolution = existingResolution;
-                        }
-                        else {
-                            resolution = loader(name_41, containingFile, compilerOptions, this.moduleResolutionHost);
-                            resolution.lastCheckTime = Date.now();
-                            newResolutions[name_41] = resolution;
-                        }
-                    }
-                    ts.Debug.assert(resolution !== undefined);
-                    resolvedModules.push(getResult(resolution));
-                }
-                cache.set(path, newResolutions);
-                return resolvedModules;
-                function moduleResolutionIsValid(resolution) {
-                    if (!resolution) {
-                        return false;
-                    }
-                    if (getResult(resolution)) {
-                        return true;
-                    }
-                    return resolution.failedLookupLocations.length === 0;
-                }
-            };
-            LSHost.prototype.resolveTypeReferenceDirectives = function (typeDirectiveNames, containingFile) {
-                return this.resolveNamesWithLocalCache(typeDirectiveNames, containingFile, this.resolvedTypeReferenceDirectives, ts.resolveTypeReferenceDirective, function (m) { return m.resolvedTypeReferenceDirective; });
-            };
-            LSHost.prototype.resolveModuleNames = function (moduleNames, containingFile) {
-                return this.resolveNamesWithLocalCache(moduleNames, containingFile, this.resolvedModuleNames, ts.resolveModuleName, function (m) { return m.resolvedModule; });
-            };
-            LSHost.prototype.getDefaultLibFileName = function () {
-                var nodeModuleBinDir = ts.getDirectoryPath(ts.normalizePath(this.host.getExecutingFilePath()));
-                return ts.combinePaths(nodeModuleBinDir, ts.getDefaultLibFileName(this.compilationSettings));
-            };
-            LSHost.prototype.getScriptSnapshot = function (filename) {
-                var scriptInfo = this.getScriptInfo(filename);
-                if (scriptInfo) {
-                    return scriptInfo.snap();
-                }
-            };
-            LSHost.prototype.setCompilationSettings = function (opt) {
-                this.compilationSettings = opt;
-                this.resolvedModuleNames.clear();
-                this.resolvedTypeReferenceDirectives.clear();
-            };
-            LSHost.prototype.lineAffectsRefs = function (filename, line) {
-                var info = this.getScriptInfo(filename);
-                var lineInfo = info.getLineInfo(line);
-                if (lineInfo && lineInfo.text) {
-                    var regex = /reference|import|\/\*|\*\//;
-                    return regex.test(lineInfo.text);
-                }
-            };
-            LSHost.prototype.getCompilationSettings = function () {
-                return this.compilationSettings;
-            };
-            LSHost.prototype.getScriptFileNames = function () {
-                return this.roots.map(function (root) { return root.fileName; });
-            };
-            LSHost.prototype.getScriptKind = function (fileName) {
-                var info = this.getScriptInfo(fileName);
-                if (!info) {
-                    return undefined;
-                }
-                if (!info.scriptKind) {
-                    info.scriptKind = ts.getScriptKindFromFileName(fileName);
-                }
-                return info.scriptKind;
-            };
-            LSHost.prototype.getScriptVersion = function (filename) {
-                return this.getScriptInfo(filename).svc.latestVersion().toString();
-            };
-            LSHost.prototype.getCurrentDirectory = function () {
-                return "";
-            };
-            LSHost.prototype.getScriptIsOpen = function (filename) {
-                return this.getScriptInfo(filename).isOpen;
-            };
-            LSHost.prototype.removeReferencedFile = function (info) {
-                if (!info.isOpen) {
-                    this.filenameToScript.remove(info.path);
-                    this.resolvedModuleNames.remove(info.path);
-                    this.resolvedTypeReferenceDirectives.remove(info.path);
-                }
-            };
-            LSHost.prototype.getScriptInfo = function (filename) {
-                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
-                var scriptInfo = this.filenameToScript.get(path);
-                if (!scriptInfo) {
-                    scriptInfo = this.project.openReferencedFile(filename);
-                    if (scriptInfo) {
-                        this.filenameToScript.set(path, scriptInfo);
-                    }
-                }
-                return scriptInfo;
-            };
-            LSHost.prototype.addRoot = function (info) {
-                if (!this.filenameToScript.contains(info.path)) {
-                    this.filenameToScript.set(info.path, info);
-                    this.roots.push(info);
-                }
-            };
-            LSHost.prototype.removeRoot = function (info) {
-                if (!this.filenameToScript.contains(info.path)) {
-                    this.filenameToScript.remove(info.path);
-                    this.roots = copyListRemovingItem(info, this.roots);
-                    this.resolvedModuleNames.remove(info.path);
-                    this.resolvedTypeReferenceDirectives.remove(info.path);
-                }
-            };
-            LSHost.prototype.saveTo = function (filename, tmpfilename) {
-                var script = this.getScriptInfo(filename);
-                if (script) {
-                    var snap = script.snap();
-                    this.host.writeFile(tmpfilename, snap.getText(0, snap.getLength()));
-                }
-            };
-            LSHost.prototype.reloadScript = function (filename, tmpfilename, cb) {
-                var script = this.getScriptInfo(filename);
-                if (script) {
-                    script.svc.reloadFromFile(tmpfilename, cb);
-                }
-            };
-            LSHost.prototype.editScript = function (filename, start, end, newText) {
-                var script = this.getScriptInfo(filename);
-                if (script) {
-                    script.editContent(start, end, newText);
-                    return;
-                }
-                throw new Error("No script with name '" + filename + "'");
-            };
-            LSHost.prototype.resolvePath = function (path) {
-                var result = this.host.resolvePath(path);
-                return result;
-            };
-            LSHost.prototype.fileExists = function (path) {
-                var result = this.host.fileExists(path);
-                return result;
-            };
-            LSHost.prototype.directoryExists = function (path) {
-                return this.host.directoryExists(path);
-            };
-            LSHost.prototype.lineToTextSpan = function (filename, line) {
-                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
-                var script = this.filenameToScript.get(path);
-                var index = script.snap().index;
-                var lineInfo = index.lineNumberToInfo(line + 1);
-                var len;
-                if (lineInfo.leaf) {
-                    len = lineInfo.leaf.text.length;
-                }
-                else {
-                    var nextLineInfo = index.lineNumberToInfo(line + 2);
-                    len = nextLineInfo.offset - lineInfo.offset;
-                }
-                return ts.createTextSpan(lineInfo.offset, len);
-            };
-            LSHost.prototype.lineOffsetToPosition = function (filename, line, offset) {
-                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
-                var script = this.filenameToScript.get(path);
-                var index = script.snap().index;
-                var lineInfo = index.lineNumberToInfo(line);
-                return (lineInfo.offset + offset - 1);
-            };
-            LSHost.prototype.positionToLineOffset = function (filename, position) {
-                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
-                var script = this.filenameToScript.get(path);
-                var index = script.snap().index;
-                var lineOffset = index.charOffsetToLineNumberAndPos(position);
-                return { line: lineOffset.line, offset: lineOffset.offset + 1 };
-            };
-            return LSHost;
-        }());
-        server.LSHost = LSHost;
-        var Project = (function () {
-            function Project(projectService, projectOptions) {
-                this.projectService = projectService;
-                this.projectOptions = projectOptions;
-                this.directoriesWatchedForTsconfig = [];
-                this.filenameToSourceFile = {};
-                this.updateGraphSeq = 0;
-                this.openRefCount = 0;
-                if (projectOptions && projectOptions.files) {
-                    projectOptions.compilerOptions.allowNonTsExtensions = true;
-                }
-                this.compilerService = new CompilerService(this, projectOptions && projectOptions.compilerOptions);
-            }
-            Project.prototype.addOpenRef = function () {
-                this.openRefCount++;
-            };
-            Project.prototype.deleteOpenRef = function () {
-                this.openRefCount--;
-                return this.openRefCount;
-            };
-            Project.prototype.openReferencedFile = function (filename) {
-                return this.projectService.openFile(filename, false);
-            };
-            Project.prototype.getRootFiles = function () {
-                return this.compilerService.host.roots.map(function (info) { return info.fileName; });
-            };
-            Project.prototype.getFileNames = function () {
-                var sourceFiles = this.program.getSourceFiles();
-                return sourceFiles.map(function (sourceFile) { return sourceFile.fileName; });
-            };
-            Project.prototype.getSourceFile = function (info) {
-                return this.filenameToSourceFile[info.fileName];
-            };
-            Project.prototype.getSourceFileFromName = function (filename, requireOpen) {
-                var info = this.projectService.getScriptInfo(filename);
-                if (info) {
-                    if ((!requireOpen) || info.isOpen) {
-                        return this.getSourceFile(info);
-                    }
-                }
-            };
-            Project.prototype.isRoot = function (info) {
-                return this.compilerService.host.roots.some(function (root) { return root === info; });
-            };
-            Project.prototype.removeReferencedFile = function (info) {
-                this.compilerService.host.removeReferencedFile(info);
-                this.updateGraph();
-            };
-            Project.prototype.updateFileMap = function () {
-                this.filenameToSourceFile = {};
-                var sourceFiles = this.program.getSourceFiles();
-                for (var i = 0, len = sourceFiles.length; i < len; i++) {
-                    var normFilename = ts.normalizePath(sourceFiles[i].fileName);
-                    this.filenameToSourceFile[normFilename] = sourceFiles[i];
-                }
-            };
-            Project.prototype.finishGraph = function () {
-                this.updateGraph();
-                this.compilerService.languageService.getNavigateToItems(".*");
-            };
-            Project.prototype.updateGraph = function () {
-                this.program = this.compilerService.languageService.getProgram();
-                this.updateFileMap();
-            };
-            Project.prototype.isConfiguredProject = function () {
-                return this.projectFilename;
-            };
-            Project.prototype.addRoot = function (info) {
-                this.compilerService.host.addRoot(info);
-            };
-            Project.prototype.removeRoot = function (info) {
-                this.compilerService.host.removeRoot(info);
-            };
-            Project.prototype.filesToString = function () {
-                var strBuilder = "";
-                ts.forEachValue(this.filenameToSourceFile, function (sourceFile) { strBuilder += sourceFile.fileName + "\n"; });
-                return strBuilder;
-            };
-            Project.prototype.setProjectOptions = function (projectOptions) {
-                this.projectOptions = projectOptions;
-                if (projectOptions.compilerOptions) {
-                    projectOptions.compilerOptions.allowNonTsExtensions = true;
-                    this.compilerService.setCompilerOptions(projectOptions.compilerOptions);
-                }
-            };
-            return Project;
-        }());
-        server.Project = Project;
-        function copyListRemovingItem(item, list) {
-            var copiedList = [];
-            for (var i = 0, len = list.length; i < len; i++) {
-                if (list[i] != item) {
-                    copiedList.push(list[i]);
-                }
-            }
-            return copiedList;
-        }
-        function combineProjectOutput(projects, action, comparer, areEqual) {
-            var result = projects.reduce(function (previous, current) { return ts.concatenate(previous, action(current)); }, []).sort(comparer);
-            return projects.length > 1 ? ts.deduplicate(result, areEqual) : result;
-        }
-        server.combineProjectOutput = combineProjectOutput;
-        var ProjectService = (function () {
-            function ProjectService(host, psLogger, eventHandler) {
-                this.host = host;
-                this.psLogger = psLogger;
-                this.eventHandler = eventHandler;
-                this.filenameToScriptInfo = {};
-                this.openFileRoots = [];
-                this.inferredProjects = [];
-                this.configuredProjects = [];
-                this.openFilesReferenced = [];
-                this.openFileRootsConfigured = [];
-                this.directoryWatchersForTsconfig = {};
-                this.directoryWatchersRefCount = {};
-                this.timerForDetectingProjectFileListChanges = {};
-                this.addDefaultHostConfiguration();
-            }
-            ProjectService.prototype.addDefaultHostConfiguration = function () {
-                this.hostConfiguration = {
-                    formatCodeOptions: ts.clone(CompilerService.getDefaultFormatCodeOptions(this.host)),
-                    hostInfo: "Unknown host"
-                };
-            };
-            ProjectService.prototype.getFormatCodeOptions = function (file) {
-                if (file) {
-                    var info = this.filenameToScriptInfo[file];
-                    if (info) {
-                        return info.formatCodeOptions;
-                    }
-                }
-                return this.hostConfiguration.formatCodeOptions;
-            };
-            ProjectService.prototype.watchedFileChanged = function (fileName) {
-                var info = this.filenameToScriptInfo[fileName];
-                if (!info) {
-                    this.psLogger.info("Error: got watch notification for unknown file: " + fileName);
-                }
-                if (!this.host.fileExists(fileName)) {
-                    this.fileDeletedInFilesystem(info);
-                }
-                else {
-                    if (info && (!info.isOpen)) {
-                        info.svc.reloadFromFile(info.fileName);
-                    }
-                }
-            };
-            ProjectService.prototype.directoryWatchedForSourceFilesChanged = function (project, fileName) {
-                if (fileName && !ts.isSupportedSourceFileName(fileName, project.projectOptions ? project.projectOptions.compilerOptions : undefined)) {
-                    return;
-                }
-                this.log("Detected source file changes: " + fileName);
-                this.startTimerForDetectingProjectFileListChanges(project);
-            };
-            ProjectService.prototype.startTimerForDetectingProjectFileListChanges = function (project) {
-                var _this = this;
-                if (this.timerForDetectingProjectFileListChanges[project.projectFilename]) {
-                    this.host.clearTimeout(this.timerForDetectingProjectFileListChanges[project.projectFilename]);
-                }
-                this.timerForDetectingProjectFileListChanges[project.projectFilename] = this.host.setTimeout(function () { return _this.handleProjectFileListChanges(project); }, 250);
-            };
-            ProjectService.prototype.handleProjectFileListChanges = function (project) {
-                var _this = this;
-                var projectOptions = this.configFileToProjectOptions(project.projectFilename).projectOptions;
-                var newRootFiles = projectOptions.files.map((function (f) { return _this.getCanonicalFileName(f); }));
-                var currentRootFiles = project.getRootFiles().map((function (f) { return _this.getCanonicalFileName(f); }));
-                if (!ts.arrayIsEqualTo(currentRootFiles && currentRootFiles.sort(), newRootFiles && newRootFiles.sort())) {
-                    this.updateConfiguredProject(project);
-                    this.updateProjectStructure();
-                }
-            };
-            ProjectService.prototype.directoryWatchedForTsconfigChanged = function (fileName) {
-                var _this = this;
-                if (ts.getBaseFileName(fileName) != "tsconfig.json") {
-                    this.log(fileName + " is not tsconfig.json");
-                    return;
-                }
-                this.log("Detected newly added tsconfig file: " + fileName);
-                var projectOptions = this.configFileToProjectOptions(fileName).projectOptions;
-                var rootFilesInTsconfig = projectOptions.files.map(function (f) { return _this.getCanonicalFileName(f); });
-                var openFileRoots = this.openFileRoots.map(function (s) { return _this.getCanonicalFileName(s.fileName); });
-                for (var _i = 0, openFileRoots_1 = openFileRoots; _i < openFileRoots_1.length; _i++) {
-                    var openFileRoot = openFileRoots_1[_i];
-                    if (rootFilesInTsconfig.indexOf(openFileRoot) >= 0) {
-                        this.reloadProjects();
-                        return;
-                    }
-                }
-            };
-            ProjectService.prototype.getCanonicalFileName = function (fileName) {
-                var name = this.host.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
-                return ts.normalizePath(name);
-            };
-            ProjectService.prototype.watchedProjectConfigFileChanged = function (project) {
-                this.log("Config file changed: " + project.projectFilename);
-                this.updateConfiguredProject(project);
-                this.updateProjectStructure();
-            };
-            ProjectService.prototype.log = function (msg, type) {
-                if (type === void 0) { type = "Err"; }
-                this.psLogger.msg(msg, type);
-            };
-            ProjectService.prototype.setHostConfiguration = function (args) {
-                if (args.file) {
-                    var info = this.filenameToScriptInfo[args.file];
-                    if (info) {
-                        info.setFormatOptions(args.formatOptions);
-                        this.log("Host configuration update for file " + args.file, "Info");
-                    }
-                }
-                else {
-                    if (args.hostInfo !== undefined) {
-                        this.hostConfiguration.hostInfo = args.hostInfo;
-                        this.log("Host information " + args.hostInfo, "Info");
-                    }
-                    if (args.formatOptions) {
-                        mergeFormatOptions(this.hostConfiguration.formatCodeOptions, args.formatOptions);
-                        this.log("Format host information updated", "Info");
-                    }
-                }
-            };
-            ProjectService.prototype.closeLog = function () {
-                this.psLogger.close();
-            };
-            ProjectService.prototype.createInferredProject = function (root) {
-                var _this = this;
-                var project = new Project(this);
-                project.addRoot(root);
-                var currentPath = ts.getDirectoryPath(root.fileName);
-                var parentPath = ts.getDirectoryPath(currentPath);
-                while (currentPath != parentPath) {
-                    if (!project.projectService.directoryWatchersForTsconfig[currentPath]) {
-                        this.log("Add watcher for: " + currentPath);
-                        project.projectService.directoryWatchersForTsconfig[currentPath] =
-                            this.host.watchDirectory(currentPath, function (fileName) { return _this.directoryWatchedForTsconfigChanged(fileName); });
-                        project.projectService.directoryWatchersRefCount[currentPath] = 1;
-                    }
-                    else {
-                        project.projectService.directoryWatchersRefCount[currentPath] += 1;
-                    }
-                    project.directoriesWatchedForTsconfig.push(currentPath);
-                    currentPath = parentPath;
-                    parentPath = ts.getDirectoryPath(parentPath);
-                }
-                project.finishGraph();
-                this.inferredProjects.push(project);
-                return project;
-            };
-            ProjectService.prototype.fileDeletedInFilesystem = function (info) {
-                this.psLogger.info(info.fileName + " deleted");
-                if (info.fileWatcher) {
-                    info.fileWatcher.close();
-                    info.fileWatcher = undefined;
-                }
-                if (!info.isOpen) {
-                    this.filenameToScriptInfo[info.fileName] = undefined;
-                    var referencingProjects = this.findReferencingProjects(info);
-                    if (info.defaultProject) {
-                        info.defaultProject.removeRoot(info);
-                    }
-                    for (var i = 0, len = referencingProjects.length; i < len; i++) {
-                        referencingProjects[i].removeReferencedFile(info);
-                    }
-                    for (var j = 0, flen = this.openFileRoots.length; j < flen; j++) {
-                        var openFile = this.openFileRoots[j];
-                        if (this.eventHandler) {
-                            this.eventHandler("context", openFile.defaultProject, openFile.fileName);
-                        }
-                    }
-                    for (var j = 0, flen = this.openFilesReferenced.length; j < flen; j++) {
-                        var openFile = this.openFilesReferenced[j];
-                        if (this.eventHandler) {
-                            this.eventHandler("context", openFile.defaultProject, openFile.fileName);
-                        }
-                    }
-                }
-                this.printProjects();
-            };
-            ProjectService.prototype.updateConfiguredProjectList = function () {
-                var configuredProjects = [];
-                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
-                    if (this.configuredProjects[i].openRefCount > 0) {
-                        configuredProjects.push(this.configuredProjects[i]);
-                    }
-                }
-                this.configuredProjects = configuredProjects;
-            };
-            ProjectService.prototype.removeProject = function (project) {
-                this.log("remove project: " + project.getRootFiles().toString());
-                if (project.isConfiguredProject()) {
-                    project.projectFileWatcher.close();
-                    project.directoryWatcher.close();
-                    this.configuredProjects = copyListRemovingItem(project, this.configuredProjects);
-                }
-                else {
-                    for (var _i = 0, _a = project.directoriesWatchedForTsconfig; _i < _a.length; _i++) {
-                        var directory = _a[_i];
-                        project.projectService.directoryWatchersRefCount[directory]--;
-                        if (!project.projectService.directoryWatchersRefCount[directory]) {
-                            this.log("Close directory watcher for: " + directory);
-                            project.projectService.directoryWatchersForTsconfig[directory].close();
-                            delete project.projectService.directoryWatchersForTsconfig[directory];
-                        }
-                    }
-                    this.inferredProjects = copyListRemovingItem(project, this.inferredProjects);
-                }
-                var fileNames = project.getFileNames();
-                for (var _b = 0, fileNames_2 = fileNames; _b < fileNames_2.length; _b++) {
-                    var fileName = fileNames_2[_b];
-                    var info = this.getScriptInfo(fileName);
-                    if (info.defaultProject == project) {
-                        info.defaultProject = undefined;
-                    }
-                }
-            };
-            ProjectService.prototype.setConfiguredProjectRoot = function (info) {
-                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
-                    var configuredProject = this.configuredProjects[i];
-                    if (configuredProject.isRoot(info)) {
-                        info.defaultProject = configuredProject;
-                        configuredProject.addOpenRef();
-                        return true;
-                    }
-                }
-                return false;
-            };
-            ProjectService.prototype.addOpenFile = function (info) {
-                if (this.setConfiguredProjectRoot(info)) {
-                    this.openFileRootsConfigured.push(info);
-                }
-                else {
-                    this.findReferencingProjects(info);
-                    if (info.defaultProject) {
-                        this.openFilesReferenced.push(info);
-                    }
-                    else {
-                        info.defaultProject = this.createInferredProject(info);
-                        var openFileRoots = [];
-                        for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
-                            var r = this.openFileRoots[i];
-                            if (info.defaultProject.getSourceFile(r)) {
-                                this.removeProject(r.defaultProject);
-                                this.openFilesReferenced.push(r);
-                                r.defaultProject = info.defaultProject;
-                            }
-                            else {
-                                openFileRoots.push(r);
-                            }
-                        }
-                        this.openFileRoots = openFileRoots;
-                        this.openFileRoots.push(info);
-                    }
-                }
-                this.updateConfiguredProjectList();
-            };
-            ProjectService.prototype.closeOpenFile = function (info) {
-                info.svc.reloadFromFile(info.fileName);
-                var openFileRoots = [];
-                var removedProject;
-                for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
-                    if (info === this.openFileRoots[i]) {
-                        removedProject = info.defaultProject;
-                    }
-                    else {
-                        openFileRoots.push(this.openFileRoots[i]);
-                    }
-                }
-                this.openFileRoots = openFileRoots;
-                if (!removedProject) {
-                    var openFileRootsConfigured = [];
-                    for (var i = 0, len = this.openFileRootsConfigured.length; i < len; i++) {
-                        if (info === this.openFileRootsConfigured[i]) {
-                            if (info.defaultProject.deleteOpenRef() === 0) {
-                                removedProject = info.defaultProject;
-                            }
-                        }
-                        else {
-                            openFileRootsConfigured.push(this.openFileRootsConfigured[i]);
-                        }
-                    }
-                    this.openFileRootsConfigured = openFileRootsConfigured;
-                }
-                if (removedProject) {
-                    this.removeProject(removedProject);
-                    var openFilesReferenced = [];
-                    var orphanFiles = [];
-                    for (var i = 0, len = this.openFilesReferenced.length; i < len; i++) {
-                        var f = this.openFilesReferenced[i];
-                        if (f.defaultProject === removedProject || !f.defaultProject) {
-                            f.defaultProject = undefined;
-                            orphanFiles.push(f);
-                        }
-                        else {
-                            openFilesReferenced.push(f);
-                        }
-                    }
-                    this.openFilesReferenced = openFilesReferenced;
-                    for (var i = 0, len = orphanFiles.length; i < len; i++) {
-                        this.addOpenFile(orphanFiles[i]);
-                    }
-                }
-                else {
-                    this.openFilesReferenced = copyListRemovingItem(info, this.openFilesReferenced);
-                }
-                info.close();
-            };
-            ProjectService.prototype.findReferencingProjects = function (info, excludedProject) {
-                var referencingProjects = [];
-                info.defaultProject = undefined;
-                for (var i = 0, len = this.inferredProjects.length; i < len; i++) {
-                    var inferredProject = this.inferredProjects[i];
-                    inferredProject.updateGraph();
-                    if (inferredProject !== excludedProject) {
-                        if (inferredProject.getSourceFile(info)) {
-                            info.defaultProject = inferredProject;
-                            referencingProjects.push(inferredProject);
-                        }
-                    }
-                }
-                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
-                    var configuredProject = this.configuredProjects[i];
-                    configuredProject.updateGraph();
-                    if (configuredProject.getSourceFile(info)) {
-                        info.defaultProject = configuredProject;
-                        referencingProjects.push(configuredProject);
-                    }
-                }
-                return referencingProjects;
-            };
-            ProjectService.prototype.reloadProjects = function () {
-                this.log("reload projects.");
-                for (var _i = 0, _a = this.openFileRoots; _i < _a.length; _i++) {
-                    var info = _a[_i];
-                    this.openOrUpdateConfiguredProjectForFile(info.fileName);
-                }
-                this.updateProjectStructure();
-            };
-            ProjectService.prototype.updateProjectStructure = function () {
-                this.log("updating project structure from ...", "Info");
-                this.printProjects();
-                var unattachedOpenFiles = [];
-                var openFileRootsConfigured = [];
-                for (var _i = 0, _a = this.openFileRootsConfigured; _i < _a.length; _i++) {
-                    var info = _a[_i];
-                    var project = info.defaultProject;
-                    if (!project || !(project.getSourceFile(info))) {
-                        info.defaultProject = undefined;
-                        unattachedOpenFiles.push(info);
-                    }
-                    else {
-                        openFileRootsConfigured.push(info);
-                    }
-                }
-                this.openFileRootsConfigured = openFileRootsConfigured;
-                var openFilesReferenced = [];
-                for (var i = 0, len = this.openFilesReferenced.length; i < len; i++) {
-                    var referencedFile = this.openFilesReferenced[i];
-                    referencedFile.defaultProject.updateGraph();
-                    var sourceFile = referencedFile.defaultProject.getSourceFile(referencedFile);
-                    if (sourceFile) {
-                        openFilesReferenced.push(referencedFile);
-                    }
-                    else {
-                        unattachedOpenFiles.push(referencedFile);
-                    }
-                }
-                this.openFilesReferenced = openFilesReferenced;
-                var openFileRoots = [];
-                for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
-                    var rootFile = this.openFileRoots[i];
-                    var rootedProject = rootFile.defaultProject;
-                    var referencingProjects = this.findReferencingProjects(rootFile, rootedProject);
-                    if (rootFile.defaultProject && rootFile.defaultProject.isConfiguredProject()) {
-                        if (!rootedProject.isConfiguredProject()) {
-                            this.removeProject(rootedProject);
-                        }
-                        this.openFileRootsConfigured.push(rootFile);
-                    }
-                    else {
-                        if (referencingProjects.length === 0) {
-                            rootFile.defaultProject = rootedProject;
-                            openFileRoots.push(rootFile);
-                        }
-                        else {
-                            this.removeProject(rootedProject);
-                            this.openFilesReferenced.push(rootFile);
-                        }
-                    }
-                }
-                this.openFileRoots = openFileRoots;
-                for (var i = 0, len = unattachedOpenFiles.length; i < len; i++) {
-                    this.addOpenFile(unattachedOpenFiles[i]);
-                }
-                this.printProjects();
-            };
-            ProjectService.prototype.getScriptInfo = function (filename) {
-                filename = ts.normalizePath(filename);
-                return ts.lookUp(this.filenameToScriptInfo, filename);
-            };
-            ProjectService.prototype.openFile = function (fileName, openedByClient, fileContent, scriptKind) {
-                var _this = this;
-                fileName = ts.normalizePath(fileName);
-                var info = ts.lookUp(this.filenameToScriptInfo, fileName);
-                if (!info) {
-                    var content = void 0;
-                    if (this.host.fileExists(fileName)) {
-                        content = fileContent || this.host.readFile(fileName);
-                    }
-                    if (!content) {
-                        if (openedByClient) {
-                            content = "";
-                        }
-                    }
-                    if (content !== undefined) {
-                        info = new ScriptInfo(this.host, fileName, content, openedByClient);
-                        info.scriptKind = scriptKind;
-                        info.setFormatOptions(this.getFormatCodeOptions());
-                        this.filenameToScriptInfo[fileName] = info;
-                        if (!info.isOpen) {
-                            info.fileWatcher = this.host.watchFile(fileName, function (_) { _this.watchedFileChanged(fileName); });
-                        }
-                    }
-                }
-                if (info) {
-                    if (fileContent) {
-                        info.svc.reload(fileContent);
-                    }
-                    if (openedByClient) {
-                        info.isOpen = true;
-                    }
-                }
-                return info;
-            };
-            ProjectService.prototype.findConfigFile = function (searchPath) {
-                while (true) {
-                    var tsconfigFileName = ts.combinePaths(searchPath, "tsconfig.json");
-                    if (this.host.fileExists(tsconfigFileName)) {
-                        return tsconfigFileName;
-                    }
-                    var jsconfigFileName = ts.combinePaths(searchPath, "jsconfig.json");
-                    if (this.host.fileExists(jsconfigFileName)) {
-                        return jsconfigFileName;
-                    }
-                    var parentPath = ts.getDirectoryPath(searchPath);
-                    if (parentPath === searchPath) {
-                        break;
-                    }
-                    searchPath = parentPath;
-                }
-                return undefined;
-            };
-            ProjectService.prototype.openClientFile = function (fileName, fileContent, scriptKind) {
-                var _a = this.openOrUpdateConfiguredProjectForFile(fileName), configFileName = _a.configFileName, configFileErrors = _a.configFileErrors;
-                var info = this.openFile(fileName, true, fileContent, scriptKind);
-                this.addOpenFile(info);
-                this.printProjects();
-                return { configFileName: configFileName, configFileErrors: configFileErrors };
-            };
-            ProjectService.prototype.openOrUpdateConfiguredProjectForFile = function (fileName) {
-                var searchPath = ts.normalizePath(ts.getDirectoryPath(fileName));
-                this.log("Search path: " + searchPath, "Info");
-                var configFileName = this.findConfigFile(searchPath);
-                if (configFileName) {
-                    this.log("Config file name: " + configFileName, "Info");
-                    var project = this.findConfiguredProjectByConfigFile(configFileName);
-                    if (!project) {
-                        var configResult = this.openConfigFile(configFileName, fileName);
-                        if (!configResult.success) {
-                            return { configFileName: configFileName, configFileErrors: configResult.errors };
-                        }
-                        else {
-                            this.log("Opened configuration file " + configFileName, "Info");
-                            this.configuredProjects.push(configResult.project);
-                            if (configResult.errors && configResult.errors.length > 0) {
-                                return { configFileName: configFileName, configFileErrors: configResult.errors };
-                            }
-                        }
-                    }
-                    else {
-                        this.updateConfiguredProject(project);
-                    }
-                }
-                else {
-                    this.log("No config files found.");
-                }
-                return {};
-            };
-            ProjectService.prototype.closeClientFile = function (filename) {
-                var info = ts.lookUp(this.filenameToScriptInfo, filename);
-                if (info) {
-                    this.closeOpenFile(info);
-                    info.isOpen = false;
-                }
-                this.printProjects();
-            };
-            ProjectService.prototype.getProjectForFile = function (filename) {
-                var scriptInfo = ts.lookUp(this.filenameToScriptInfo, filename);
-                if (scriptInfo) {
-                    return scriptInfo.defaultProject;
-                }
-            };
-            ProjectService.prototype.printProjectsForFile = function (filename) {
-                var scriptInfo = ts.lookUp(this.filenameToScriptInfo, filename);
-                if (scriptInfo) {
-                    this.psLogger.startGroup();
-                    this.psLogger.info("Projects for " + filename);
-                    var projects = this.findReferencingProjects(scriptInfo);
-                    for (var i = 0, len = projects.length; i < len; i++) {
-                        this.psLogger.info("Project " + i.toString());
-                    }
-                    this.psLogger.endGroup();
-                }
-                else {
-                    this.psLogger.info(filename + " not in any project");
-                }
-            };
-            ProjectService.prototype.printProjects = function () {
-                if (!this.psLogger.isVerbose()) {
-                    return;
-                }
-                this.psLogger.startGroup();
-                for (var i = 0, len = this.inferredProjects.length; i < len; i++) {
-                    var project = this.inferredProjects[i];
-                    project.updateGraph();
-                    this.psLogger.info("Project " + i.toString());
-                    this.psLogger.info(project.filesToString());
-                    this.psLogger.info("-----------------------------------------------");
-                }
-                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
-                    var project = this.configuredProjects[i];
-                    project.updateGraph();
-                    this.psLogger.info("Project (configured) " + (i + this.inferredProjects.length).toString());
-                    this.psLogger.info(project.filesToString());
-                    this.psLogger.info("-----------------------------------------------");
-                }
-                this.psLogger.info("Open file roots of inferred projects: ");
-                for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
-                    this.psLogger.info(this.openFileRoots[i].fileName);
-                }
-                this.psLogger.info("Open files referenced by inferred or configured projects: ");
-                for (var i = 0, len = this.openFilesReferenced.length; i < len; i++) {
-                    var fileInfo = this.openFilesReferenced[i].fileName;
-                    if (this.openFilesReferenced[i].defaultProject.isConfiguredProject()) {
-                        fileInfo += " (configured)";
-                    }
-                    this.psLogger.info(fileInfo);
-                }
-                this.psLogger.info("Open file roots of configured projects: ");
-                for (var i = 0, len = this.openFileRootsConfigured.length; i < len; i++) {
-                    this.psLogger.info(this.openFileRootsConfigured[i].fileName);
-                }
-                this.psLogger.endGroup();
-            };
-            ProjectService.prototype.configProjectIsActive = function (fileName) {
-                return this.findConfiguredProjectByConfigFile(fileName) === undefined;
-            };
-            ProjectService.prototype.findConfiguredProjectByConfigFile = function (configFileName) {
-                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
-                    if (this.configuredProjects[i].projectFilename == configFileName) {
-                        return this.configuredProjects[i];
-                    }
-                }
-                return undefined;
-            };
-            ProjectService.prototype.configFileToProjectOptions = function (configFilename) {
-                configFilename = ts.normalizePath(configFilename);
-                var dirPath = ts.getDirectoryPath(configFilename);
-                var contents = this.host.readFile(configFilename);
-                var rawConfig = ts.parseConfigFileTextToJson(configFilename, contents);
-                if (rawConfig.error) {
-                    return { succeeded: false, errors: [rawConfig.error] };
-                }
-                else {
-                    var parsedCommandLine = ts.parseJsonConfigFileContent(rawConfig.config, this.host, dirPath, {}, configFilename);
-                    ts.Debug.assert(!!parsedCommandLine.fileNames);
-                    if (parsedCommandLine.errors && (parsedCommandLine.errors.length > 0)) {
-                        return { succeeded: false, errors: parsedCommandLine.errors };
-                    }
-                    else if (parsedCommandLine.fileNames.length === 0) {
-                        var error = ts.createCompilerDiagnostic(ts.Diagnostics.The_config_file_0_found_doesn_t_contain_any_source_files, configFilename);
-                        return { succeeded: false, errors: [error] };
-                    }
-                    else {
-                        var projectOptions = {
-                            files: parsedCommandLine.fileNames,
-                            compilerOptions: parsedCommandLine.options
-                        };
-                        return { succeeded: true, projectOptions: projectOptions };
-                    }
-                }
-            };
-            ProjectService.prototype.openConfigFile = function (configFilename, clientFileName) {
-                var _this = this;
-                var _a = this.configFileToProjectOptions(configFilename), succeeded = _a.succeeded, projectOptions = _a.projectOptions, errors = _a.errors;
-                if (!succeeded) {
-                    return { success: false, errors: errors };
-                }
-                else {
-                    var project_1 = this.createProject(configFilename, projectOptions);
-                    var errors_1;
-                    for (var _i = 0, _b = projectOptions.files; _i < _b.length; _i++) {
-                        var rootFilename = _b[_i];
-                        if (this.host.fileExists(rootFilename)) {
-                            var info = this.openFile(rootFilename, clientFileName == rootFilename);
-                            project_1.addRoot(info);
-                        }
-                        else {
-                            (errors_1 || (errors_1 = [])).push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, rootFilename));
-                        }
-                    }
-                    project_1.finishGraph();
-                    project_1.projectFileWatcher = this.host.watchFile(configFilename, function (_) { return _this.watchedProjectConfigFileChanged(project_1); });
-                    this.log("Add recursive watcher for: " + ts.getDirectoryPath(configFilename));
-                    project_1.directoryWatcher = this.host.watchDirectory(ts.getDirectoryPath(configFilename), function (path) { return _this.directoryWatchedForSourceFilesChanged(project_1, path); }, true);
-                    return { success: true, project: project_1, errors: errors_1 };
-                }
-            };
-            ProjectService.prototype.updateConfiguredProject = function (project) {
-                var _this = this;
-                if (!this.host.fileExists(project.projectFilename)) {
-                    this.log("Config file deleted");
-                    this.removeProject(project);
-                }
-                else {
-                    var _a = this.configFileToProjectOptions(project.projectFilename), succeeded = _a.succeeded, projectOptions = _a.projectOptions, errors = _a.errors;
-                    if (!succeeded) {
-                        return errors;
-                    }
-                    else {
-                        var oldFileNames_1 = project.compilerService.host.roots.map(function (info) { return info.fileName; });
-                        var newFileNames_1 = ts.filter(projectOptions.files, function (f) { return _this.host.fileExists(f); });
-                        var fileNamesToRemove = oldFileNames_1.filter(function (f) { return newFileNames_1.indexOf(f) < 0; });
-                        var fileNamesToAdd = newFileNames_1.filter(function (f) { return oldFileNames_1.indexOf(f) < 0; });
-                        for (var _i = 0, fileNamesToRemove_1 = fileNamesToRemove; _i < fileNamesToRemove_1.length; _i++) {
-                            var fileName = fileNamesToRemove_1[_i];
-                            var info = this.getScriptInfo(fileName);
-                            if (info) {
-                                project.removeRoot(info);
-                            }
-                        }
-                        for (var _b = 0, fileNamesToAdd_1 = fileNamesToAdd; _b < fileNamesToAdd_1.length; _b++) {
-                            var fileName = fileNamesToAdd_1[_b];
-                            var info = this.getScriptInfo(fileName);
-                            if (!info) {
-                                info = this.openFile(fileName, false);
-                            }
-                            else {
-                                if (info.isOpen) {
-                                    if (this.openFileRoots.indexOf(info) >= 0) {
-                                        this.openFileRoots = copyListRemovingItem(info, this.openFileRoots);
-                                        if (info.defaultProject && !info.defaultProject.isConfiguredProject()) {
-                                            this.removeProject(info.defaultProject);
-                                        }
-                                    }
-                                    if (this.openFilesReferenced.indexOf(info) >= 0) {
-                                        this.openFilesReferenced = copyListRemovingItem(info, this.openFilesReferenced);
-                                    }
-                                    this.openFileRootsConfigured.push(info);
-                                    info.defaultProject = project;
-                                }
-                            }
-                            project.addRoot(info);
-                        }
-                        project.setProjectOptions(projectOptions);
-                        project.finishGraph();
-                    }
-                }
-            };
-            ProjectService.prototype.createProject = function (projectFilename, projectOptions) {
-                var project = new Project(this, projectOptions);
-                project.projectFilename = projectFilename;
-                return project;
-            };
-            return ProjectService;
-        }());
-        server.ProjectService = ProjectService;
-        var CompilerService = (function () {
-            function CompilerService(project, opt) {
-                this.project = project;
-                this.documentRegistry = ts.createDocumentRegistry();
-                this.host = new LSHost(project.projectService.host, project);
-                if (opt) {
-                    this.setCompilerOptions(opt);
-                }
-                else {
-                    var defaultOpts = ts.getDefaultCompilerOptions();
-                    defaultOpts.allowNonTsExtensions = true;
-                    defaultOpts.allowJs = true;
-                    this.setCompilerOptions(defaultOpts);
-                }
-                this.languageService = ts.createLanguageService(this.host, this.documentRegistry);
-                this.classifier = ts.createClassifier();
-            }
-            CompilerService.prototype.setCompilerOptions = function (opt) {
-                this.settings = opt;
-                this.host.setCompilationSettings(opt);
-            };
-            CompilerService.prototype.isExternalModule = function (filename) {
-                var sourceFile = this.languageService.getNonBoundSourceFile(filename);
-                return ts.isExternalModule(sourceFile);
-            };
-            CompilerService.getDefaultFormatCodeOptions = function (host) {
-                return ts.clone({
-                    IndentSize: 4,
-                    TabSize: 4,
-                    NewLineCharacter: host.newLine || "\n",
-                    ConvertTabsToSpaces: true,
-                    IndentStyle: ts.IndentStyle.Smart,
-                    InsertSpaceAfterCommaDelimiter: true,
-                    InsertSpaceAfterSemicolonInForStatements: true,
-                    InsertSpaceBeforeAndAfterBinaryOperators: true,
-                    InsertSpaceAfterKeywordsInControlFlowStatements: true,
-                    InsertSpaceAfterFunctionKeywordForAnonymousFunctions: false,
-                    InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: false,
-                    InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: false,
-                    InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: false,
-                    PlaceOpenBraceOnNewLineForFunctions: false,
-                    PlaceOpenBraceOnNewLineForControlBlocks: false
-                });
-            };
-            return CompilerService;
-        }());
-        server.CompilerService = CompilerService;
-        (function (CharRangeSection) {
-            CharRangeSection[CharRangeSection["PreStart"] = 0] = "PreStart";
-            CharRangeSection[CharRangeSection["Start"] = 1] = "Start";
-            CharRangeSection[CharRangeSection["Entire"] = 2] = "Entire";
-            CharRangeSection[CharRangeSection["Mid"] = 3] = "Mid";
-            CharRangeSection[CharRangeSection["End"] = 4] = "End";
-            CharRangeSection[CharRangeSection["PostEnd"] = 5] = "PostEnd";
-        })(server.CharRangeSection || (server.CharRangeSection = {}));
-        var CharRangeSection = server.CharRangeSection;
-        var BaseLineIndexWalker = (function () {
-            function BaseLineIndexWalker() {
-                this.goSubtree = true;
-                this.done = false;
-            }
-            BaseLineIndexWalker.prototype.leaf = function (rangeStart, rangeLength, ll) {
-            };
-            return BaseLineIndexWalker;
-        }());
-        var EditWalker = (function (_super) {
-            __extends(EditWalker, _super);
-            function EditWalker() {
-                _super.call(this);
-                this.lineIndex = new LineIndex();
-                this.endBranch = [];
-                this.state = CharRangeSection.Entire;
-                this.initialText = "";
-                this.trailingText = "";
-                this.suppressTrailingText = false;
-                this.lineIndex.root = new LineNode();
-                this.startPath = [this.lineIndex.root];
-                this.stack = [this.lineIndex.root];
-            }
-            EditWalker.prototype.insertLines = function (insertedText) {
-                if (this.suppressTrailingText) {
-                    this.trailingText = "";
-                }
-                if (insertedText) {
-                    insertedText = this.initialText + insertedText + this.trailingText;
-                }
-                else {
-                    insertedText = this.initialText + this.trailingText;
-                }
-                var lm = LineIndex.linesFromText(insertedText);
-                var lines = lm.lines;
-                if (lines.length > 1) {
-                    if (lines[lines.length - 1] == "") {
-                        lines.length--;
-                    }
-                }
-                var branchParent;
-                var lastZeroCount;
-                for (var k = this.endBranch.length - 1; k >= 0; k--) {
-                    this.endBranch[k].updateCounts();
-                    if (this.endBranch[k].charCount() === 0) {
-                        lastZeroCount = this.endBranch[k];
-                        if (k > 0) {
-                            branchParent = this.endBranch[k - 1];
-                        }
-                        else {
-                            branchParent = this.branchNode;
-                        }
-                    }
-                }
-                if (lastZeroCount) {
-                    branchParent.remove(lastZeroCount);
-                }
-                var insertionNode = this.startPath[this.startPath.length - 2];
-                var leafNode = this.startPath[this.startPath.length - 1];
-                var len = lines.length;
-                if (len > 0) {
-                    leafNode.text = lines[0];
-                    if (len > 1) {
-                        var insertedNodes = new Array(len - 1);
-                        var startNode = leafNode;
-                        for (var i = 1, len_1 = lines.length; i < len_1; i++) {
-                            insertedNodes[i - 1] = new LineLeaf(lines[i]);
-                        }
-                        var pathIndex = this.startPath.length - 2;
-                        while (pathIndex >= 0) {
-                            insertionNode = this.startPath[pathIndex];
-                            insertedNodes = insertionNode.insertAt(startNode, insertedNodes);
-                            pathIndex--;
-                            startNode = insertionNode;
-                        }
-                        var insertedNodesLen = insertedNodes.length;
-                        while (insertedNodesLen > 0) {
-                            var newRoot = new LineNode();
-                            newRoot.add(this.lineIndex.root);
-                            insertedNodes = newRoot.insertAt(this.lineIndex.root, insertedNodes);
-                            insertedNodesLen = insertedNodes.length;
-                            this.lineIndex.root = newRoot;
-                        }
-                        this.lineIndex.root.updateCounts();
-                    }
-                    else {
-                        for (var j = this.startPath.length - 2; j >= 0; j--) {
-                            this.startPath[j].updateCounts();
-                        }
-                    }
-                }
-                else {
-                    insertionNode.remove(leafNode);
-                    for (var j = this.startPath.length - 2; j >= 0; j--) {
-                        this.startPath[j].updateCounts();
-                    }
-                }
-                return this.lineIndex;
-            };
-            EditWalker.prototype.post = function (relativeStart, relativeLength, lineCollection, parent, nodeType) {
-                if (lineCollection === this.lineCollectionAtBranch) {
-                    this.state = CharRangeSection.End;
-                }
-                this.stack.length--;
-                return undefined;
-            };
-            EditWalker.prototype.pre = function (relativeStart, relativeLength, lineCollection, parent, nodeType) {
-                var currentNode = this.stack[this.stack.length - 1];
-                if ((this.state === CharRangeSection.Entire) && (nodeType === CharRangeSection.Start)) {
-                    this.state = CharRangeSection.Start;
-                    this.branchNode = currentNode;
-                    this.lineCollectionAtBranch = lineCollection;
-                }
-                var child;
-                function fresh(node) {
-                    if (node.isLeaf()) {
-                        return new LineLeaf("");
-                    }
-                    else
-                        return new LineNode();
-                }
-                switch (nodeType) {
-                    case CharRangeSection.PreStart:
-                        this.goSubtree = false;
-                        if (this.state !== CharRangeSection.End) {
-                            currentNode.add(lineCollection);
-                        }
-                        break;
-                    case CharRangeSection.Start:
-                        if (this.state === CharRangeSection.End) {
-                            this.goSubtree = false;
-                        }
-                        else {
-                            child = fresh(lineCollection);
-                            currentNode.add(child);
-                            this.startPath[this.startPath.length] = child;
-                        }
-                        break;
-                    case CharRangeSection.Entire:
-                        if (this.state !== CharRangeSection.End) {
-                            child = fresh(lineCollection);
-                            currentNode.add(child);
-                            this.startPath[this.startPath.length] = child;
-                        }
-                        else {
-                            if (!lineCollection.isLeaf()) {
-                                child = fresh(lineCollection);
-                                currentNode.add(child);
-                                this.endBranch[this.endBranch.length] = child;
-                            }
-                        }
-                        break;
-                    case CharRangeSection.Mid:
-                        this.goSubtree = false;
-                        break;
-                    case CharRangeSection.End:
-                        if (this.state !== CharRangeSection.End) {
-                            this.goSubtree = false;
-                        }
-                        else {
-                            if (!lineCollection.isLeaf()) {
-                                child = fresh(lineCollection);
-                                currentNode.add(child);
-                                this.endBranch[this.endBranch.length] = child;
-                            }
-                        }
-                        break;
-                    case CharRangeSection.PostEnd:
-                        this.goSubtree = false;
-                        if (this.state !== CharRangeSection.Start) {
-                            currentNode.add(lineCollection);
-                        }
-                        break;
-                }
-                if (this.goSubtree) {
-                    this.stack[this.stack.length] = child;
-                }
-                return lineCollection;
-            };
-            EditWalker.prototype.leaf = function (relativeStart, relativeLength, ll) {
-                if (this.state === CharRangeSection.Start) {
-                    this.initialText = ll.text.substring(0, relativeStart);
-                }
-                else if (this.state === CharRangeSection.Entire) {
-                    this.initialText = ll.text.substring(0, relativeStart);
-                    this.trailingText = ll.text.substring(relativeStart + relativeLength);
-                }
-                else {
-                    this.trailingText = ll.text.substring(relativeStart + relativeLength);
-                }
-            };
-            return EditWalker;
-        }(BaseLineIndexWalker));
-        var TextChange = (function () {
-            function TextChange(pos, deleteLen, insertedText) {
-                this.pos = pos;
-                this.deleteLen = deleteLen;
-                this.insertedText = insertedText;
-            }
-            TextChange.prototype.getTextChangeRange = function () {
-                return ts.createTextChangeRange(ts.createTextSpan(this.pos, this.deleteLen), this.insertedText ? this.insertedText.length : 0);
-            };
-            return TextChange;
-        }());
-        server.TextChange = TextChange;
-        var ScriptVersionCache = (function () {
-            function ScriptVersionCache() {
-                this.changes = [];
-                this.versions = [];
-                this.minVersion = 0;
-                this.currentVersion = 0;
-            }
-            ScriptVersionCache.prototype.edit = function (pos, deleteLen, insertedText) {
-                this.changes[this.changes.length] = new TextChange(pos, deleteLen, insertedText);
-                if ((this.changes.length > ScriptVersionCache.changeNumberThreshold) ||
-                    (deleteLen > ScriptVersionCache.changeLengthThreshold) ||
-                    (insertedText && (insertedText.length > ScriptVersionCache.changeLengthThreshold))) {
-                    this.getSnapshot();
-                }
-            };
-            ScriptVersionCache.prototype.latest = function () {
-                return this.versions[this.currentVersion];
-            };
-            ScriptVersionCache.prototype.latestVersion = function () {
-                if (this.changes.length > 0) {
-                    this.getSnapshot();
-                }
-                return this.currentVersion;
-            };
-            ScriptVersionCache.prototype.reloadFromFile = function (filename, cb) {
-                var content = this.host.readFile(filename);
-                if (!content) {
-                    content = "";
-                }
-                this.reload(content);
-                if (cb)
-                    cb();
-            };
-            ScriptVersionCache.prototype.reload = function (script) {
-                this.currentVersion++;
-                this.changes = [];
-                var snap = new LineIndexSnapshot(this.currentVersion, this);
-                this.versions[this.currentVersion] = snap;
-                snap.index = new LineIndex();
-                var lm = LineIndex.linesFromText(script);
-                snap.index.load(lm.lines);
-                for (var i = this.minVersion; i < this.currentVersion; i++) {
-                    this.versions[i] = undefined;
-                }
-                this.minVersion = this.currentVersion;
-            };
-            ScriptVersionCache.prototype.getSnapshot = function () {
-                var snap = this.versions[this.currentVersion];
-                if (this.changes.length > 0) {
-                    var snapIndex = this.latest().index;
-                    for (var i = 0, len = this.changes.length; i < len; i++) {
-                        var change = this.changes[i];
-                        snapIndex = snapIndex.edit(change.pos, change.deleteLen, change.insertedText);
-                    }
-                    snap = new LineIndexSnapshot(this.currentVersion + 1, this);
-                    snap.index = snapIndex;
-                    snap.changesSincePreviousVersion = this.changes;
-                    this.currentVersion = snap.version;
-                    this.versions[snap.version] = snap;
-                    this.changes = [];
-                    if ((this.currentVersion - this.minVersion) >= ScriptVersionCache.maxVersions) {
-                        var oldMin = this.minVersion;
-                        this.minVersion = (this.currentVersion - ScriptVersionCache.maxVersions) + 1;
-                        for (var j = oldMin; j < this.minVersion; j++) {
-                            this.versions[j] = undefined;
-                        }
-                    }
-                }
-                return snap;
-            };
-            ScriptVersionCache.prototype.getTextChangesBetweenVersions = function (oldVersion, newVersion) {
-                if (oldVersion < newVersion) {
-                    if (oldVersion >= this.minVersion) {
-                        var textChangeRanges = [];
-                        for (var i = oldVersion + 1; i <= newVersion; i++) {
-                            var snap = this.versions[i];
-                            for (var j = 0, len = snap.changesSincePreviousVersion.length; j < len; j++) {
-                                var textChange = snap.changesSincePreviousVersion[j];
-                                textChangeRanges[textChangeRanges.length] = textChange.getTextChangeRange();
-                            }
-                        }
-                        return ts.collapseTextChangeRangesAcrossMultipleVersions(textChangeRanges);
-                    }
-                    else {
-                        return undefined;
-                    }
-                }
-                else {
-                    return ts.unchangedTextChangeRange;
-                }
-            };
-            ScriptVersionCache.fromString = function (host, script) {
-                var svc = new ScriptVersionCache();
-                var snap = new LineIndexSnapshot(0, svc);
-                svc.versions[svc.currentVersion] = snap;
-                svc.host = host;
-                snap.index = new LineIndex();
-                var lm = LineIndex.linesFromText(script);
-                snap.index.load(lm.lines);
-                return svc;
-            };
-            ScriptVersionCache.changeNumberThreshold = 8;
-            ScriptVersionCache.changeLengthThreshold = 256;
-            ScriptVersionCache.maxVersions = 8;
-            return ScriptVersionCache;
-        }());
-        server.ScriptVersionCache = ScriptVersionCache;
-        var LineIndexSnapshot = (function () {
-            function LineIndexSnapshot(version, cache) {
-                this.version = version;
-                this.cache = cache;
-                this.changesSincePreviousVersion = [];
-            }
-            LineIndexSnapshot.prototype.getText = function (rangeStart, rangeEnd) {
-                return this.index.getText(rangeStart, rangeEnd - rangeStart);
-            };
-            LineIndexSnapshot.prototype.getLength = function () {
-                return this.index.root.charCount();
-            };
-            LineIndexSnapshot.prototype.getLineStartPositions = function () {
-                var starts = [-1];
-                var count = 1;
-                var pos = 0;
-                this.index.every(function (ll, s, len) {
-                    starts[count] = pos;
-                    count++;
-                    pos += ll.text.length;
-                    return true;
-                }, 0);
-                return starts;
-            };
-            LineIndexSnapshot.prototype.getLineMapper = function () {
-                var _this = this;
-                return function (line) {
-                    return _this.index.lineNumberToInfo(line).offset;
-                };
-            };
-            LineIndexSnapshot.prototype.getTextChangeRangeSinceVersion = function (scriptVersion) {
-                if (this.version <= scriptVersion) {
-                    return ts.unchangedTextChangeRange;
-                }
-                else {
-                    return this.cache.getTextChangesBetweenVersions(scriptVersion, this.version);
-                }
-            };
-            LineIndexSnapshot.prototype.getChangeRange = function (oldSnapshot) {
-                var oldSnap = oldSnapshot;
-                return this.getTextChangeRangeSinceVersion(oldSnap.version);
-            };
-            return LineIndexSnapshot;
-        }());
-        server.LineIndexSnapshot = LineIndexSnapshot;
-        var LineIndex = (function () {
-            function LineIndex() {
-                this.checkEdits = false;
-            }
-            LineIndex.prototype.charOffsetToLineNumberAndPos = function (charOffset) {
-                return this.root.charOffsetToLineNumberAndPos(1, charOffset);
-            };
-            LineIndex.prototype.lineNumberToInfo = function (lineNumber) {
-                var lineCount = this.root.lineCount();
-                if (lineNumber <= lineCount) {
-                    var lineInfo = this.root.lineNumberToInfo(lineNumber, 0);
-                    lineInfo.line = lineNumber;
-                    return lineInfo;
-                }
-                else {
-                    return {
-                        line: lineNumber,
-                        offset: this.root.charCount()
-                    };
-                }
-            };
-            LineIndex.prototype.load = function (lines) {
-                if (lines.length > 0) {
-                    var leaves = [];
-                    for (var i = 0, len = lines.length; i < len; i++) {
-                        leaves[i] = new LineLeaf(lines[i]);
-                    }
-                    this.root = LineIndex.buildTreeFromBottom(leaves);
-                }
-                else {
-                    this.root = new LineNode();
-                }
-            };
-            LineIndex.prototype.walk = function (rangeStart, rangeLength, walkFns) {
-                this.root.walk(rangeStart, rangeLength, walkFns);
-            };
-            LineIndex.prototype.getText = function (rangeStart, rangeLength) {
-                var accum = "";
-                if ((rangeLength > 0) && (rangeStart < this.root.charCount())) {
-                    this.walk(rangeStart, rangeLength, {
-                        goSubtree: true,
-                        done: false,
-                        leaf: function (relativeStart, relativeLength, ll) {
-                            accum = accum.concat(ll.text.substring(relativeStart, relativeStart + relativeLength));
-                        }
-                    });
-                }
-                return accum;
-            };
-            LineIndex.prototype.getLength = function () {
-                return this.root.charCount();
-            };
-            LineIndex.prototype.every = function (f, rangeStart, rangeEnd) {
-                if (!rangeEnd) {
-                    rangeEnd = this.root.charCount();
-                }
-                var walkFns = {
-                    goSubtree: true,
-                    done: false,
-                    leaf: function (relativeStart, relativeLength, ll) {
-                        if (!f(ll, relativeStart, relativeLength)) {
-                            this.done = true;
-                        }
-                    }
-                };
-                this.walk(rangeStart, rangeEnd - rangeStart, walkFns);
-                return !walkFns.done;
-            };
-            LineIndex.prototype.edit = function (pos, deleteLength, newText) {
-                function editFlat(source, s, dl, nt) {
-                    if (nt === void 0) { nt = ""; }
-                    return source.substring(0, s) + nt + source.substring(s + dl, source.length);
-                }
-                if (this.root.charCount() === 0) {
-                    if (newText) {
-                        this.load(LineIndex.linesFromText(newText).lines);
-                        return this;
-                    }
-                }
-                else {
-                    var checkText = void 0;
-                    if (this.checkEdits) {
-                        checkText = editFlat(this.getText(0, this.root.charCount()), pos, deleteLength, newText);
-                    }
-                    var walker = new EditWalker();
-                    if (pos >= this.root.charCount()) {
-                        pos = this.root.charCount() - 1;
-                        var endString = this.getText(pos, 1);
-                        if (newText) {
-                            newText = endString + newText;
-                        }
-                        else {
-                            newText = endString;
-                        }
-                        deleteLength = 0;
-                        walker.suppressTrailingText = true;
-                    }
-                    else if (deleteLength > 0) {
-                        var e = pos + deleteLength;
-                        var lineInfo = this.charOffsetToLineNumberAndPos(e);
-                        if ((lineInfo && (lineInfo.offset === 0))) {
-                            deleteLength += lineInfo.text.length;
-                            if (newText) {
-                                newText = newText + lineInfo.text;
-                            }
-                            else {
-                                newText = lineInfo.text;
-                            }
-                        }
-                    }
-                    if (pos < this.root.charCount()) {
-                        this.root.walk(pos, deleteLength, walker);
-                        walker.insertLines(newText);
-                    }
-                    if (this.checkEdits) {
-                        var updatedText = this.getText(0, this.root.charCount());
-                        ts.Debug.assert(checkText == updatedText, "buffer edit mismatch");
-                    }
-                    return walker.lineIndex;
-                }
-            };
-            LineIndex.buildTreeFromBottom = function (nodes) {
-                var nodeCount = Math.ceil(nodes.length / lineCollectionCapacity);
-                var interiorNodes = [];
-                var nodeIndex = 0;
-                for (var i = 0; i < nodeCount; i++) {
-                    interiorNodes[i] = new LineNode();
-                    var charCount = 0;
-                    var lineCount = 0;
-                    for (var j = 0; j < lineCollectionCapacity; j++) {
-                        if (nodeIndex < nodes.length) {
-                            interiorNodes[i].add(nodes[nodeIndex]);
-                            charCount += nodes[nodeIndex].charCount();
-                            lineCount += nodes[nodeIndex].lineCount();
-                        }
-                        else {
-                            break;
-                        }
-                        nodeIndex++;
-                    }
-                    interiorNodes[i].totalChars = charCount;
-                    interiorNodes[i].totalLines = lineCount;
-                }
-                if (interiorNodes.length === 1) {
-                    return interiorNodes[0];
-                }
-                else {
-                    return this.buildTreeFromBottom(interiorNodes);
-                }
-            };
-            LineIndex.linesFromText = function (text) {
-                var lineStarts = ts.computeLineStarts(text);
-                if (lineStarts.length === 0) {
-                    return { lines: [], lineMap: lineStarts };
-                }
-                var lines = new Array(lineStarts.length);
-                var lc = lineStarts.length - 1;
-                for (var lmi = 0; lmi < lc; lmi++) {
-                    lines[lmi] = text.substring(lineStarts[lmi], lineStarts[lmi + 1]);
-                }
-                var endText = text.substring(lineStarts[lc]);
-                if (endText.length > 0) {
-                    lines[lc] = endText;
-                }
-                else {
-                    lines.length--;
-                }
-                return { lines: lines, lineMap: lineStarts };
-            };
-            return LineIndex;
-        }());
-        server.LineIndex = LineIndex;
-        var LineNode = (function () {
-            function LineNode() {
-                this.totalChars = 0;
-                this.totalLines = 0;
-                this.children = [];
-            }
-            LineNode.prototype.isLeaf = function () {
-                return false;
-            };
-            LineNode.prototype.updateCounts = function () {
-                this.totalChars = 0;
-                this.totalLines = 0;
-                for (var i = 0, len = this.children.length; i < len; i++) {
-                    var child = this.children[i];
-                    this.totalChars += child.charCount();
-                    this.totalLines += child.lineCount();
-                }
-            };
-            LineNode.prototype.execWalk = function (rangeStart, rangeLength, walkFns, childIndex, nodeType) {
-                if (walkFns.pre) {
-                    walkFns.pre(rangeStart, rangeLength, this.children[childIndex], this, nodeType);
-                }
-                if (walkFns.goSubtree) {
-                    this.children[childIndex].walk(rangeStart, rangeLength, walkFns);
-                    if (walkFns.post) {
-                        walkFns.post(rangeStart, rangeLength, this.children[childIndex], this, nodeType);
-                    }
-                }
-                else {
-                    walkFns.goSubtree = true;
-                }
-                return walkFns.done;
-            };
-            LineNode.prototype.skipChild = function (relativeStart, relativeLength, childIndex, walkFns, nodeType) {
-                if (walkFns.pre && (!walkFns.done)) {
-                    walkFns.pre(relativeStart, relativeLength, this.children[childIndex], this, nodeType);
-                    walkFns.goSubtree = true;
-                }
-            };
-            LineNode.prototype.walk = function (rangeStart, rangeLength, walkFns) {
-                var childIndex = 0;
-                var child = this.children[0];
-                var childCharCount = child.charCount();
-                var adjustedStart = rangeStart;
-                while (adjustedStart >= childCharCount) {
-                    this.skipChild(adjustedStart, rangeLength, childIndex, walkFns, CharRangeSection.PreStart);
-                    adjustedStart -= childCharCount;
-                    childIndex++;
-                    child = this.children[childIndex];
-                    childCharCount = child.charCount();
-                }
-                if ((adjustedStart + rangeLength) <= childCharCount) {
-                    if (this.execWalk(adjustedStart, rangeLength, walkFns, childIndex, CharRangeSection.Entire)) {
-                        return;
-                    }
-                }
-                else {
-                    if (this.execWalk(adjustedStart, childCharCount - adjustedStart, walkFns, childIndex, CharRangeSection.Start)) {
-                        return;
-                    }
-                    var adjustedLength = rangeLength - (childCharCount - adjustedStart);
-                    childIndex++;
-                    child = this.children[childIndex];
-                    childCharCount = child.charCount();
-                    while (adjustedLength > childCharCount) {
-                        if (this.execWalk(0, childCharCount, walkFns, childIndex, CharRangeSection.Mid)) {
-                            return;
-                        }
-                        adjustedLength -= childCharCount;
-                        childIndex++;
-                        child = this.children[childIndex];
-                        childCharCount = child.charCount();
-                    }
-                    if (adjustedLength > 0) {
-                        if (this.execWalk(0, adjustedLength, walkFns, childIndex, CharRangeSection.End)) {
-                            return;
-                        }
-                    }
-                }
-                if (walkFns.pre) {
-                    var clen = this.children.length;
-                    if (childIndex < (clen - 1)) {
-                        for (var ej = childIndex + 1; ej < clen; ej++) {
-                            this.skipChild(0, 0, ej, walkFns, CharRangeSection.PostEnd);
-                        }
-                    }
-                }
-            };
-            LineNode.prototype.charOffsetToLineNumberAndPos = function (lineNumber, charOffset) {
-                var childInfo = this.childFromCharOffset(lineNumber, charOffset);
-                if (!childInfo.child) {
-                    return {
-                        line: lineNumber,
-                        offset: charOffset
-                    };
-                }
-                else if (childInfo.childIndex < this.children.length) {
-                    if (childInfo.child.isLeaf()) {
-                        return {
-                            line: childInfo.lineNumber,
-                            offset: childInfo.charOffset,
-                            text: (childInfo.child).text,
-                            leaf: (childInfo.child)
-                        };
-                    }
-                    else {
-                        var lineNode = (childInfo.child);
-                        return lineNode.charOffsetToLineNumberAndPos(childInfo.lineNumber, childInfo.charOffset);
-                    }
-                }
-                else {
-                    var lineInfo = this.lineNumberToInfo(this.lineCount(), 0);
-                    return { line: this.lineCount(), offset: lineInfo.leaf.charCount() };
-                }
-            };
-            LineNode.prototype.lineNumberToInfo = function (lineNumber, charOffset) {
-                var childInfo = this.childFromLineNumber(lineNumber, charOffset);
-                if (!childInfo.child) {
-                    return {
-                        line: lineNumber,
-                        offset: charOffset
-                    };
-                }
-                else if (childInfo.child.isLeaf()) {
-                    return {
-                        line: lineNumber,
-                        offset: childInfo.charOffset,
-                        text: (childInfo.child).text,
-                        leaf: (childInfo.child)
-                    };
-                }
-                else {
-                    var lineNode = (childInfo.child);
-                    return lineNode.lineNumberToInfo(childInfo.relativeLineNumber, childInfo.charOffset);
-                }
-            };
-            LineNode.prototype.childFromLineNumber = function (lineNumber, charOffset) {
-                var child;
-                var relativeLineNumber = lineNumber;
-                var i;
-                var len;
-                for (i = 0, len = this.children.length; i < len; i++) {
-                    child = this.children[i];
-                    var childLineCount = child.lineCount();
-                    if (childLineCount >= relativeLineNumber) {
-                        break;
-                    }
-                    else {
-                        relativeLineNumber -= childLineCount;
-                        charOffset += child.charCount();
-                    }
-                }
-                return {
-                    child: child,
-                    childIndex: i,
-                    relativeLineNumber: relativeLineNumber,
-                    charOffset: charOffset
-                };
-            };
-            LineNode.prototype.childFromCharOffset = function (lineNumber, charOffset) {
-                var child;
-                var i;
-                var len;
-                for (i = 0, len = this.children.length; i < len; i++) {
-                    child = this.children[i];
-                    if (child.charCount() > charOffset) {
-                        break;
-                    }
-                    else {
-                        charOffset -= child.charCount();
-                        lineNumber += child.lineCount();
-                    }
-                }
-                return {
-                    child: child,
-                    childIndex: i,
-                    charOffset: charOffset,
-                    lineNumber: lineNumber
-                };
-            };
-            LineNode.prototype.splitAfter = function (childIndex) {
-                var splitNode;
-                var clen = this.children.length;
-                childIndex++;
-                var endLength = childIndex;
-                if (childIndex < clen) {
-                    splitNode = new LineNode();
-                    while (childIndex < clen) {
-                        splitNode.add(this.children[childIndex]);
-                        childIndex++;
-                    }
-                    splitNode.updateCounts();
-                }
-                this.children.length = endLength;
-                return splitNode;
-            };
-            LineNode.prototype.remove = function (child) {
-                var childIndex = this.findChildIndex(child);
-                var clen = this.children.length;
-                if (childIndex < (clen - 1)) {
-                    for (var i = childIndex; i < (clen - 1); i++) {
-                        this.children[i] = this.children[i + 1];
-                    }
-                }
-                this.children.length--;
-            };
-            LineNode.prototype.findChildIndex = function (child) {
-                var childIndex = 0;
-                var clen = this.children.length;
-                while ((this.children[childIndex] !== child) && (childIndex < clen))
-                    childIndex++;
-                return childIndex;
-            };
-            LineNode.prototype.insertAt = function (child, nodes) {
-                var childIndex = this.findChildIndex(child);
-                var clen = this.children.length;
-                var nodeCount = nodes.length;
-                if ((clen < lineCollectionCapacity) && (childIndex === (clen - 1)) && (nodeCount === 1)) {
-                    this.add(nodes[0]);
-                    this.updateCounts();
-                    return [];
-                }
-                else {
-                    var shiftNode = this.splitAfter(childIndex);
-                    var nodeIndex = 0;
-                    childIndex++;
-                    while ((childIndex < lineCollectionCapacity) && (nodeIndex < nodeCount)) {
-                        this.children[childIndex] = nodes[nodeIndex];
-                        childIndex++;
-                        nodeIndex++;
-                    }
-                    var splitNodes = [];
-                    var splitNodeCount = 0;
-                    if (nodeIndex < nodeCount) {
-                        splitNodeCount = Math.ceil((nodeCount - nodeIndex) / lineCollectionCapacity);
-                        splitNodes = new Array(splitNodeCount);
-                        var splitNodeIndex = 0;
-                        for (var i = 0; i < splitNodeCount; i++) {
-                            splitNodes[i] = new LineNode();
-                        }
-                        var splitNode = splitNodes[0];
-                        while (nodeIndex < nodeCount) {
-                            splitNode.add(nodes[nodeIndex]);
-                            nodeIndex++;
-                            if (splitNode.children.length === lineCollectionCapacity) {
-                                splitNodeIndex++;
-                                splitNode = splitNodes[splitNodeIndex];
-                            }
-                        }
-                        for (var i = splitNodes.length - 1; i >= 0; i--) {
-                            if (splitNodes[i].children.length === 0) {
-                                splitNodes.length--;
-                            }
-                        }
-                    }
-                    if (shiftNode) {
-                        splitNodes[splitNodes.length] = shiftNode;
-                    }
-                    this.updateCounts();
-                    for (var i = 0; i < splitNodeCount; i++) {
-                        splitNodes[i].updateCounts();
-                    }
-                    return splitNodes;
-                }
-            };
-            LineNode.prototype.add = function (collection) {
-                this.children[this.children.length] = collection;
-                return (this.children.length < lineCollectionCapacity);
-            };
-            LineNode.prototype.charCount = function () {
-                return this.totalChars;
-            };
-            LineNode.prototype.lineCount = function () {
-                return this.totalLines;
-            };
-            return LineNode;
-        }());
-        server.LineNode = LineNode;
-        var LineLeaf = (function () {
-            function LineLeaf(text) {
-                this.text = text;
-            }
-            LineLeaf.prototype.setUdata = function (data) {
-                this.udata = data;
-            };
-            LineLeaf.prototype.getUdata = function () {
-                return this.udata;
-            };
-            LineLeaf.prototype.isLeaf = function () {
-                return true;
-            };
-            LineLeaf.prototype.walk = function (rangeStart, rangeLength, walkFns) {
-                walkFns.leaf(rangeStart, rangeLength, this);
-            };
-            LineLeaf.prototype.charCount = function () {
-                return this.text.length;
-            };
-            LineLeaf.prototype.lineCount = function () {
-                return 1;
-            };
-            return LineLeaf;
-        }());
-        server.LineLeaf = LineLeaf;
-    })(server = ts.server || (ts.server = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var server;
-    (function (server) {
-        var readline = require("readline");
-        var fs = require("fs");
-        var rl = readline.createInterface({
-            input: process.stdin,
-            output: process.stdout,
-            terminal: false
-        });
-        var Logger = (function () {
-            function Logger(logFilename, level) {
-                this.logFilename = logFilename;
-                this.level = level;
-                this.fd = -1;
-                this.seq = 0;
-                this.inGroup = false;
-                this.firstInGroup = true;
-            }
-            Logger.padStringRight = function (str, padding) {
-                return (str + padding).slice(0, padding.length);
-            };
-            Logger.prototype.close = function () {
-                if (this.fd >= 0) {
-                    fs.close(this.fd);
-                }
-            };
-            Logger.prototype.perftrc = function (s) {
-                this.msg(s, "Perf");
-            };
-            Logger.prototype.info = function (s) {
-                this.msg(s, "Info");
-            };
-            Logger.prototype.startGroup = function () {
-                this.inGroup = true;
-                this.firstInGroup = true;
-            };
-            Logger.prototype.endGroup = function () {
-                this.inGroup = false;
-                this.seq++;
-                this.firstInGroup = true;
-            };
-            Logger.prototype.loggingEnabled = function () {
-                return !!this.logFilename;
-            };
-            Logger.prototype.isVerbose = function () {
-                return this.loggingEnabled() && (this.level == "verbose");
-            };
-            Logger.prototype.msg = function (s, type) {
-                if (type === void 0) { type = "Err"; }
-                if (this.fd < 0) {
-                    if (this.logFilename) {
-                        this.fd = fs.openSync(this.logFilename, "w");
-                    }
-                }
-                if (this.fd >= 0) {
-                    s = s + "\n";
-                    var prefix = Logger.padStringRight(type + " " + this.seq.toString(), "          ");
-                    if (this.firstInGroup) {
-                        s = prefix + s;
-                        this.firstInGroup = false;
-                    }
-                    if (!this.inGroup) {
-                        this.seq++;
-                        this.firstInGroup = true;
-                    }
-                    var buf = new Buffer(s);
-                    fs.writeSync(this.fd, buf, 0, buf.length, null);
-                }
-            };
-            return Logger;
-        }());
-        var IOSession = (function (_super) {
-            __extends(IOSession, _super);
-            function IOSession(host, logger) {
-                _super.call(this, host, Buffer.byteLength, process.hrtime, logger);
-            }
-            IOSession.prototype.exit = function () {
-                this.projectService.log("Exiting...", "Info");
-                this.projectService.closeLog();
-                process.exit(0);
-            };
-            IOSession.prototype.listen = function () {
-                var _this = this;
-                rl.on("line", function (input) {
-                    var message = input.trim();
-                    _this.onMessage(message);
-                });
-                rl.on("close", function () {
-                    _this.exit();
-                });
-            };
-            return IOSession;
-        }(server.Session));
-        function parseLoggingEnvironmentString(logEnvStr) {
-            var logEnv = {};
-            var args = logEnvStr.split(" ");
-            for (var i = 0, len = args.length; i < (len - 1); i += 2) {
-                var option = args[i];
-                var value = args[i + 1];
-                if (option && value) {
-                    switch (option) {
-                        case "-file":
-                            logEnv.file = value;
-                            break;
-                        case "-level":
-                            logEnv.detailLevel = value;
-                            break;
-                    }
-                }
-            }
-            return logEnv;
-        }
-        function createLoggerFromEnv() {
-            var fileName = undefined;
-            var detailLevel = "normal";
-            var logEnvStr = process.env["TSS_LOG"];
-            if (logEnvStr) {
-                var logEnv = parseLoggingEnvironmentString(logEnvStr);
-                if (logEnv.file) {
-                    fileName = logEnv.file;
-                }
-                else {
-                    fileName = __dirname + "/.log" + process.pid.toString();
-                }
-                if (logEnv.detailLevel) {
-                    detailLevel = logEnv.detailLevel;
-                }
-            }
-            return new Logger(fileName, detailLevel);
-        }
-        function createPollingWatchedFileSet(interval, chunkSize) {
-            if (interval === void 0) { interval = 2500; }
-            if (chunkSize === void 0) { chunkSize = 30; }
-            var watchedFiles = [];
-            var nextFileToCheck = 0;
-            var watchTimer;
-            function getModifiedTime(fileName) {
-                return fs.statSync(fileName).mtime;
-            }
-            function poll(checkedIndex) {
-                var watchedFile = watchedFiles[checkedIndex];
-                if (!watchedFile) {
-                    return;
-                }
-                fs.stat(watchedFile.fileName, function (err, stats) {
-                    if (err) {
-                        watchedFile.callback(watchedFile.fileName);
-                    }
-                    else if (watchedFile.mtime.getTime() !== stats.mtime.getTime()) {
-                        watchedFile.mtime = getModifiedTime(watchedFile.fileName);
-                        watchedFile.callback(watchedFile.fileName, watchedFile.mtime.getTime() === 0);
-                    }
-                });
-            }
-            function startWatchTimer() {
-                watchTimer = setInterval(function () {
-                    var count = 0;
-                    var nextToCheck = nextFileToCheck;
-                    var firstCheck = -1;
-                    while ((count < chunkSize) && (nextToCheck !== firstCheck)) {
-                        poll(nextToCheck);
-                        if (firstCheck < 0) {
-                            firstCheck = nextToCheck;
-                        }
-                        nextToCheck++;
-                        if (nextToCheck === watchedFiles.length) {
-                            nextToCheck = 0;
-                        }
-                        count++;
-                    }
-                    nextFileToCheck = nextToCheck;
-                }, interval);
-            }
-            function addFile(fileName, callback) {
-                var file = {
-                    fileName: fileName,
-                    callback: callback,
-                    mtime: getModifiedTime(fileName)
-                };
-                watchedFiles.push(file);
-                if (watchedFiles.length === 1) {
-                    startWatchTimer();
-                }
-                return file;
-            }
-            function removeFile(file) {
-                watchedFiles = ts.copyListRemovingItem(file, watchedFiles);
-            }
-            return {
-                getModifiedTime: getModifiedTime,
-                poll: poll,
-                startWatchTimer: startWatchTimer,
-                addFile: addFile,
-                removeFile: removeFile
-            };
-        }
-        var pollingWatchedFileSet = createPollingWatchedFileSet();
-        var logger = createLoggerFromEnv();
-        var pending = [];
-        var canWrite = true;
-        function writeMessage(s) {
-            if (!canWrite) {
-                pending.push(s);
-            }
-            else {
-                canWrite = false;
-                process.stdout.write(new Buffer(s, "utf8"), setCanWriteFlagAndWriteMessageIfNecessary);
-            }
-        }
-        function setCanWriteFlagAndWriteMessageIfNecessary() {
-            canWrite = true;
-            if (pending.length) {
-                writeMessage(pending.shift());
-            }
-        }
-        var sys = ts.sys;
-        sys.write = function (s) { return writeMessage(s); };
-        sys.watchFile = function (fileName, callback) {
-            var watchedFile = pollingWatchedFileSet.addFile(fileName, callback);
-            return {
-                close: function () { return pollingWatchedFileSet.removeFile(watchedFile); }
-            };
-        };
-        sys.setTimeout = setTimeout;
-        sys.clearTimeout = clearTimeout;
-        var ioSession = new IOSession(sys, logger);
-        process.on("uncaughtException", function (err) {
-            ioSession.logError(err, "unknown");
-        });
-        ioSession.listen();
-    })(server = ts.server || (ts.server = {}));
-})(ts || (ts = {}));
-var debugObjectHost = this;
-var ts;
-(function (ts) {
-    function logInternalError(logger, err) {
-        if (logger) {
-            logger.log("*INTERNAL ERROR* - Exception in typescript services: " + err.message);
-        }
-    }
-    var ScriptSnapshotShimAdapter = (function () {
-        function ScriptSnapshotShimAdapter(scriptSnapshotShim) {
-            this.scriptSnapshotShim = scriptSnapshotShim;
-        }
-        ScriptSnapshotShimAdapter.prototype.getText = function (start, end) {
-            return this.scriptSnapshotShim.getText(start, end);
-        };
-        ScriptSnapshotShimAdapter.prototype.getLength = function () {
-            return this.scriptSnapshotShim.getLength();
-        };
-        ScriptSnapshotShimAdapter.prototype.getChangeRange = function (oldSnapshot) {
-            var oldSnapshotShim = oldSnapshot;
-            var encoded = this.scriptSnapshotShim.getChangeRange(oldSnapshotShim.scriptSnapshotShim);
-            if (encoded == null) {
-                return null;
-            }
-            var decoded = JSON.parse(encoded);
-            return ts.createTextChangeRange(ts.createTextSpan(decoded.span.start, decoded.span.length), decoded.newLength);
-        };
-        ScriptSnapshotShimAdapter.prototype.dispose = function () {
-            if ("dispose" in this.scriptSnapshotShim) {
-                this.scriptSnapshotShim.dispose();
-            }
-        };
-        return ScriptSnapshotShimAdapter;
-    }());
-    var LanguageServiceShimHostAdapter = (function () {
-        function LanguageServiceShimHostAdapter(shimHost) {
-            var _this = this;
-            this.shimHost = shimHost;
-            this.loggingEnabled = false;
-            this.tracingEnabled = false;
-            if ("getModuleResolutionsForFile" in this.shimHost) {
-                this.resolveModuleNames = function (moduleNames, containingFile) {
-                    var resolutionsInFile = JSON.parse(_this.shimHost.getModuleResolutionsForFile(containingFile));
-                    return ts.map(moduleNames, function (name) {
-                        var result = ts.lookUp(resolutionsInFile, name);
-                        return result ? { resolvedFileName: result } : undefined;
-                    });
-                };
-            }
-            if ("directoryExists" in this.shimHost) {
-                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
-            }
-            if ("getTypeReferenceDirectiveResolutionsForFile" in this.shimHost) {
-                this.resolveTypeReferenceDirectives = function (typeDirectiveNames, containingFile) {
-                    var typeDirectivesForFile = JSON.parse(_this.shimHost.getTypeReferenceDirectiveResolutionsForFile(containingFile));
-                    return ts.map(typeDirectiveNames, function (name) { return ts.lookUp(typeDirectivesForFile, name); });
-                };
-            }
-        }
-        LanguageServiceShimHostAdapter.prototype.log = function (s) {
-            if (this.loggingEnabled) {
-                this.shimHost.log(s);
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.trace = function (s) {
-            if (this.tracingEnabled) {
-                this.shimHost.trace(s);
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.error = function (s) {
-            this.shimHost.error(s);
-        };
-        LanguageServiceShimHostAdapter.prototype.getProjectVersion = function () {
-            if (!this.shimHost.getProjectVersion) {
-                return undefined;
-            }
-            return this.shimHost.getProjectVersion();
-        };
-        LanguageServiceShimHostAdapter.prototype.useCaseSensitiveFileNames = function () {
-            return this.shimHost.useCaseSensitiveFileNames ? this.shimHost.useCaseSensitiveFileNames() : false;
-        };
-        LanguageServiceShimHostAdapter.prototype.getCompilationSettings = function () {
-            var settingsJson = this.shimHost.getCompilationSettings();
-            if (settingsJson == null || settingsJson == "") {
-                throw Error("LanguageServiceShimHostAdapter.getCompilationSettings: empty compilationSettings");
-            }
-            return JSON.parse(settingsJson);
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptFileNames = function () {
-            var encoded = this.shimHost.getScriptFileNames();
-            return this.files = JSON.parse(encoded);
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptSnapshot = function (fileName) {
-            var scriptSnapshot = this.shimHost.getScriptSnapshot(fileName);
-            return scriptSnapshot && new ScriptSnapshotShimAdapter(scriptSnapshot);
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptKind = function (fileName) {
-            if ("getScriptKind" in this.shimHost) {
-                return this.shimHost.getScriptKind(fileName);
-            }
-            else {
-                return 0;
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptVersion = function (fileName) {
-            return this.shimHost.getScriptVersion(fileName);
-        };
-        LanguageServiceShimHostAdapter.prototype.getLocalizedDiagnosticMessages = function () {
-            var diagnosticMessagesJson = this.shimHost.getLocalizedDiagnosticMessages();
-            if (diagnosticMessagesJson == null || diagnosticMessagesJson == "") {
-                return null;
-            }
-            try {
-                return JSON.parse(diagnosticMessagesJson);
-            }
-            catch (e) {
-                this.log(e.description || "diagnosticMessages.generated.json has invalid JSON format");
-                return null;
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.getCancellationToken = function () {
-            var hostCancellationToken = this.shimHost.getCancellationToken();
-            return new ThrottledCancellationToken(hostCancellationToken);
-        };
-        LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
-            return this.shimHost.getCurrentDirectory();
-        };
-        LanguageServiceShimHostAdapter.prototype.getDirectories = function (path) {
-            return this.shimHost.getDirectories(path);
-        };
-        LanguageServiceShimHostAdapter.prototype.getDefaultLibFileName = function (options) {
-            return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
-        };
-        return LanguageServiceShimHostAdapter;
-    }());
-    ts.LanguageServiceShimHostAdapter = LanguageServiceShimHostAdapter;
-    var ThrottledCancellationToken = (function () {
-        function ThrottledCancellationToken(hostCancellationToken) {
-            this.hostCancellationToken = hostCancellationToken;
-            this.lastCancellationCheckTime = 0;
-        }
-        ThrottledCancellationToken.prototype.isCancellationRequested = function () {
-            var time = Date.now();
-            var duration = Math.abs(time - this.lastCancellationCheckTime);
-            if (duration > 10) {
-                this.lastCancellationCheckTime = time;
-                return this.hostCancellationToken.isCancellationRequested();
-            }
-            return false;
-        };
-        return ThrottledCancellationToken;
-    }());
-    var CoreServicesShimHostAdapter = (function () {
-        function CoreServicesShimHostAdapter(shimHost) {
-            var _this = this;
-            this.shimHost = shimHost;
-            if ("directoryExists" in this.shimHost) {
-                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
-            }
-            if ("realpath" in this.shimHost) {
-                this.realpath = function (path) { return _this.shimHost.realpath(path); };
-            }
-        }
-        CoreServicesShimHostAdapter.prototype.readDirectory = function (rootDir, extension, exclude, depth) {
-            var encoded;
-            try {
-                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude), depth);
-            }
-            catch (e) {
-                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude));
-            }
-            return JSON.parse(encoded);
-        };
-        CoreServicesShimHostAdapter.prototype.fileExists = function (fileName) {
-            return this.shimHost.fileExists(fileName);
-        };
-        CoreServicesShimHostAdapter.prototype.readFile = function (fileName) {
-            return this.shimHost.readFile(fileName);
-        };
-        return CoreServicesShimHostAdapter;
-    }());
-    ts.CoreServicesShimHostAdapter = CoreServicesShimHostAdapter;
-    function simpleForwardCall(logger, actionDescription, action, logPerformance) {
-        var start;
-        if (logPerformance) {
-            logger.log(actionDescription);
-            start = Date.now();
-        }
-        var result = action();
-        if (logPerformance) {
-            var end = Date.now();
-            logger.log(actionDescription + " completed in " + (end - start) + " msec");
-            if (typeof result === "string") {
-                var str = result;
-                if (str.length > 128) {
-                    str = str.substring(0, 128) + "...";
-                }
-                logger.log("  result.length=" + str.length + ", result='" + JSON.stringify(str) + "'");
-            }
-        }
-        return result;
-    }
-    function forwardJSONCall(logger, actionDescription, action, logPerformance) {
-        try {
-            var result = simpleForwardCall(logger, actionDescription, action, logPerformance);
-            return JSON.stringify({ result: result });
-        }
-        catch (err) {
-            if (err instanceof ts.OperationCanceledException) {
-                return JSON.stringify({ canceled: true });
-            }
-            logInternalError(logger, err);
-            err.description = actionDescription;
-            return JSON.stringify({ error: err });
-        }
-    }
-    var ShimBase = (function () {
-        function ShimBase(factory) {
-            this.factory = factory;
-            factory.registerShim(this);
-        }
-        ShimBase.prototype.dispose = function (dummy) {
-            this.factory.unregisterShim(this);
-        };
-        return ShimBase;
-    }());
-    function realizeDiagnostics(diagnostics, newLine) {
-        return diagnostics.map(function (d) { return realizeDiagnostic(d, newLine); });
-    }
-    ts.realizeDiagnostics = realizeDiagnostics;
-    function realizeDiagnostic(diagnostic, newLine) {
-        return {
-            message: ts.flattenDiagnosticMessageText(diagnostic.messageText, newLine),
-            start: diagnostic.start,
-            length: diagnostic.length,
-            category: ts.DiagnosticCategory[diagnostic.category].toLowerCase(),
-            code: diagnostic.code
-        };
-    }
-    var LanguageServiceShimObject = (function (_super) {
-        __extends(LanguageServiceShimObject, _super);
-        function LanguageServiceShimObject(factory, host, languageService) {
-            _super.call(this, factory);
-            this.host = host;
-            this.languageService = languageService;
-            this.logPerformance = false;
-            this.logger = this.host;
-        }
-        LanguageServiceShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
-            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
-        };
-        LanguageServiceShimObject.prototype.dispose = function (dummy) {
-            this.logger.log("dispose()");
-            this.languageService.dispose();
-            this.languageService = null;
-            if (debugObjectHost && debugObjectHost.CollectGarbage) {
-                debugObjectHost.CollectGarbage();
-                this.logger.log("CollectGarbage()");
-            }
-            this.logger = null;
-            _super.prototype.dispose.call(this, dummy);
-        };
-        LanguageServiceShimObject.prototype.refresh = function (throwOnError) {
-            this.forwardJSONCall("refresh(" + throwOnError + ")", function () { return null; });
-        };
-        LanguageServiceShimObject.prototype.cleanupSemanticCache = function () {
-            var _this = this;
-            this.forwardJSONCall("cleanupSemanticCache()", function () {
-                _this.languageService.cleanupSemanticCache();
-                return null;
-            });
-        };
-        LanguageServiceShimObject.prototype.realizeDiagnostics = function (diagnostics) {
-            var newLine = ts.getNewLineOrDefaultFromHost(this.host);
-            return ts.realizeDiagnostics(diagnostics, newLine);
-        };
-        LanguageServiceShimObject.prototype.getSyntacticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSyntacticClassifications(fileName, ts.createTextSpan(start, length)); });
-        };
-        LanguageServiceShimObject.prototype.getSemanticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSemanticClassifications(fileName, ts.createTextSpan(start, length)); });
-        };
-        LanguageServiceShimObject.prototype.getEncodedSyntacticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getEncodedSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return convertClassifications(_this.languageService.getEncodedSyntacticClassifications(fileName, ts.createTextSpan(start, length))); });
-        };
-        LanguageServiceShimObject.prototype.getEncodedSemanticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getEncodedSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return convertClassifications(_this.languageService.getEncodedSemanticClassifications(fileName, ts.createTextSpan(start, length))); });
-        };
-        LanguageServiceShimObject.prototype.getSyntacticDiagnostics = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getSyntacticDiagnostics('" + fileName + "')", function () {
-                var diagnostics = _this.languageService.getSyntacticDiagnostics(fileName);
-                return _this.realizeDiagnostics(diagnostics);
-            });
-        };
-        LanguageServiceShimObject.prototype.getSemanticDiagnostics = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getSemanticDiagnostics('" + fileName + "')", function () {
-                var diagnostics = _this.languageService.getSemanticDiagnostics(fileName);
-                return _this.realizeDiagnostics(diagnostics);
-            });
-        };
-        LanguageServiceShimObject.prototype.getCompilerOptionsDiagnostics = function () {
-            var _this = this;
-            return this.forwardJSONCall("getCompilerOptionsDiagnostics()", function () {
-                var diagnostics = _this.languageService.getCompilerOptionsDiagnostics();
-                return _this.realizeDiagnostics(diagnostics);
-            });
-        };
-        LanguageServiceShimObject.prototype.getQuickInfoAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getQuickInfoAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getQuickInfoAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getNameOrDottedNameSpan = function (fileName, startPos, endPos) {
-            var _this = this;
-            return this.forwardJSONCall("getNameOrDottedNameSpan('" + fileName + "', " + startPos + ", " + endPos + ")", function () { return _this.languageService.getNameOrDottedNameSpan(fileName, startPos, endPos); });
-        };
-        LanguageServiceShimObject.prototype.getBreakpointStatementAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getBreakpointStatementAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBreakpointStatementAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getSignatureHelpItems = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getSignatureHelpItems('" + fileName + "', " + position + ")", function () { return _this.languageService.getSignatureHelpItems(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getDefinitionAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDefinitionAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getTypeDefinitionAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getTypeDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getTypeDefinitionAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getRenameInfo = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getRenameInfo('" + fileName + "', " + position + ")", function () { return _this.languageService.getRenameInfo(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.findRenameLocations = function (fileName, position, findInStrings, findInComments) {
-            var _this = this;
-            return this.forwardJSONCall("findRenameLocations('" + fileName + "', " + position + ", " + findInStrings + ", " + findInComments + ")", function () { return _this.languageService.findRenameLocations(fileName, position, findInStrings, findInComments); });
-        };
-        LanguageServiceShimObject.prototype.getBraceMatchingAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getBraceMatchingAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBraceMatchingAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.isValidBraceCompletionAtPostion = function (fileName, position, openingBrace) {
-            var _this = this;
-            return this.forwardJSONCall("isValidBraceCompletionAtPostion('" + fileName + "', " + position + ", " + openingBrace + ")", function () { return _this.languageService.isValidBraceCompletionAtPostion(fileName, position, openingBrace); });
-        };
-        LanguageServiceShimObject.prototype.getIndentationAtPosition = function (fileName, position, options) {
-            var _this = this;
-            return this.forwardJSONCall("getIndentationAtPosition('" + fileName + "', " + position + ")", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getIndentationAtPosition(fileName, position, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getReferencesAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getReferencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getReferencesAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.findReferences = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("findReferences('" + fileName + "', " + position + ")", function () { return _this.languageService.findReferences(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getOccurrencesAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getOccurrencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getOccurrencesAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getDocumentHighlights = function (fileName, position, filesToSearch) {
-            var _this = this;
-            return this.forwardJSONCall("getDocumentHighlights('" + fileName + "', " + position + ")", function () {
-                var results = _this.languageService.getDocumentHighlights(fileName, position, JSON.parse(filesToSearch));
-                var normalizedName = ts.normalizeSlashes(fileName).toLowerCase();
-                return ts.filter(results, function (r) { return ts.normalizeSlashes(r.fileName).toLowerCase() === normalizedName; });
-            });
-        };
-        LanguageServiceShimObject.prototype.getCompletionsAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getCompletionsAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getCompletionsAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getCompletionEntryDetails = function (fileName, position, entryName) {
-            var _this = this;
-            return this.forwardJSONCall("getCompletionEntryDetails('" + fileName + "', " + position + ", '" + entryName + "')", function () { return _this.languageService.getCompletionEntryDetails(fileName, position, entryName); });
-        };
-        LanguageServiceShimObject.prototype.getFormattingEditsForRange = function (fileName, start, end, options) {
-            var _this = this;
-            return this.forwardJSONCall("getFormattingEditsForRange('" + fileName + "', " + start + ", " + end + ")", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getFormattingEditsForRange(fileName, start, end, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getFormattingEditsForDocument = function (fileName, options) {
-            var _this = this;
-            return this.forwardJSONCall("getFormattingEditsForDocument('" + fileName + "')", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getFormattingEditsForDocument(fileName, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getFormattingEditsAfterKeystroke = function (fileName, position, key, options) {
-            var _this = this;
-            return this.forwardJSONCall("getFormattingEditsAfterKeystroke('" + fileName + "', " + position + ", '" + key + "')", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getFormattingEditsAfterKeystroke(fileName, position, key, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getDocCommentTemplateAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getDocCommentTemplateAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDocCommentTemplateAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getNavigateToItems = function (searchValue, maxResultCount) {
-            var _this = this;
-            return this.forwardJSONCall("getNavigateToItems('" + searchValue + "', " + maxResultCount + ")", function () { return _this.languageService.getNavigateToItems(searchValue, maxResultCount); });
-        };
-        LanguageServiceShimObject.prototype.getNavigationBarItems = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getNavigationBarItems('" + fileName + "')", function () { return _this.languageService.getNavigationBarItems(fileName); });
-        };
-        LanguageServiceShimObject.prototype.getOutliningSpans = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getOutliningSpans('" + fileName + "')", function () { return _this.languageService.getOutliningSpans(fileName); });
-        };
-        LanguageServiceShimObject.prototype.getTodoComments = function (fileName, descriptors) {
-            var _this = this;
-            return this.forwardJSONCall("getTodoComments('" + fileName + "')", function () { return _this.languageService.getTodoComments(fileName, JSON.parse(descriptors)); });
-        };
-        LanguageServiceShimObject.prototype.getEmitOutput = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getEmitOutput('" + fileName + "')", function () { return _this.languageService.getEmitOutput(fileName); });
-        };
-        return LanguageServiceShimObject;
-    }(ShimBase));
-    function convertClassifications(classifications) {
-        return { spans: classifications.spans.join(","), endOfLineState: classifications.endOfLineState };
-    }
-    var ClassifierShimObject = (function (_super) {
-        __extends(ClassifierShimObject, _super);
-        function ClassifierShimObject(factory, logger) {
-            _super.call(this, factory);
-            this.logger = logger;
-            this.logPerformance = false;
-            this.classifier = ts.createClassifier();
-        }
-        ClassifierShimObject.prototype.getEncodedLexicalClassifications = function (text, lexState, syntacticClassifierAbsent) {
-            var _this = this;
-            return forwardJSONCall(this.logger, "getEncodedLexicalClassifications", function () { return convertClassifications(_this.classifier.getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent)); }, this.logPerformance);
-        };
-        ClassifierShimObject.prototype.getClassificationsForLine = function (text, lexState, classifyKeywordsInGenerics) {
-            var classification = this.classifier.getClassificationsForLine(text, lexState, classifyKeywordsInGenerics);
-            var result = "";
-            for (var _i = 0, _a = classification.entries; _i < _a.length; _i++) {
-                var item = _a[_i];
-                result += item.length + "\n";
-                result += item.classification + "\n";
-            }
-            result += classification.finalLexState;
-            return result;
-        };
-        return ClassifierShimObject;
-    }(ShimBase));
-    var CoreServicesShimObject = (function (_super) {
-        __extends(CoreServicesShimObject, _super);
-        function CoreServicesShimObject(factory, logger, host) {
-            _super.call(this, factory);
-            this.logger = logger;
-            this.host = host;
-            this.logPerformance = false;
-        }
-        CoreServicesShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
-            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
-        };
-        CoreServicesShimObject.prototype.resolveModuleName = function (fileName, moduleName, compilerOptionsJson) {
-            var _this = this;
-            return this.forwardJSONCall("resolveModuleName('" + fileName + "')", function () {
-                var compilerOptions = JSON.parse(compilerOptionsJson);
-                var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
-                return {
-                    resolvedFileName: result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined,
-                    failedLookupLocations: result.failedLookupLocations
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.resolveTypeReferenceDirective = function (fileName, typeReferenceDirective, compilerOptionsJson) {
-            var _this = this;
-            return this.forwardJSONCall("resolveTypeReferenceDirective(" + fileName + ")", function () {
-                var compilerOptions = JSON.parse(compilerOptionsJson);
-                var result = ts.resolveTypeReferenceDirective(typeReferenceDirective, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
-                return {
-                    resolvedFileName: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.resolvedFileName : undefined,
-                    primary: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.primary : true,
-                    failedLookupLocations: result.failedLookupLocations
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.getPreProcessedFileInfo = function (fileName, sourceTextSnapshot) {
-            var _this = this;
-            return this.forwardJSONCall("getPreProcessedFileInfo('" + fileName + "')", function () {
-                var result = ts.preProcessFile(sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength()), true, true);
-                return {
-                    referencedFiles: _this.convertFileReferences(result.referencedFiles),
-                    importedFiles: _this.convertFileReferences(result.importedFiles),
-                    ambientExternalModules: result.ambientExternalModules,
-                    isLibFile: result.isLibFile,
-                    typeReferenceDirectives: _this.convertFileReferences(result.typeReferenceDirectives)
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.convertFileReferences = function (refs) {
-            if (!refs) {
-                return undefined;
-            }
-            var result = [];
-            for (var _i = 0, refs_2 = refs; _i < refs_2.length; _i++) {
-                var ref = refs_2[_i];
-                result.push({
-                    path: ts.normalizeSlashes(ref.fileName),
-                    position: ref.pos,
-                    length: ref.end - ref.pos
-                });
-            }
-            return result;
-        };
-        CoreServicesShimObject.prototype.getTSConfigFileInfo = function (fileName, sourceTextSnapshot) {
-            var _this = this;
-            return this.forwardJSONCall("getTSConfigFileInfo('" + fileName + "')", function () {
-                var text = sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength());
-                var result = ts.parseConfigFileTextToJson(fileName, text);
-                if (result.error) {
-                    return {
-                        options: {},
-                        typingOptions: {},
-                        files: [],
-                        raw: {},
-                        errors: [realizeDiagnostic(result.error, "\r\n")]
-                    };
-                }
-                var normalizedFileName = ts.normalizeSlashes(fileName);
-                var configFile = ts.parseJsonConfigFileContent(result.config, _this.host, ts.getDirectoryPath(normalizedFileName), {}, normalizedFileName);
-                return {
-                    options: configFile.options,
-                    typingOptions: configFile.typingOptions,
-                    files: configFile.fileNames,
-                    raw: configFile.raw,
-                    errors: realizeDiagnostics(configFile.errors, "\r\n")
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.getDefaultCompilationSettings = function () {
-            return this.forwardJSONCall("getDefaultCompilationSettings()", function () { return ts.getDefaultCompilerOptions(); });
-        };
-        CoreServicesShimObject.prototype.discoverTypings = function (discoverTypingsJson) {
-            var _this = this;
-            var getCanonicalFileName = ts.createGetCanonicalFileName(false);
-            return this.forwardJSONCall("discoverTypings()", function () {
-                var info = JSON.parse(discoverTypingsJson);
-                return ts.JsTyping.discoverTypings(_this.host, info.fileNames, ts.toPath(info.projectRootPath, info.projectRootPath, getCanonicalFileName), ts.toPath(info.safeListPath, info.safeListPath, getCanonicalFileName), info.packageNameToTypingLocation, info.typingOptions, info.compilerOptions);
-            });
-        };
-        return CoreServicesShimObject;
-    }(ShimBase));
-    var TypeScriptServicesFactory = (function () {
-        function TypeScriptServicesFactory() {
-            this._shims = [];
-        }
-        TypeScriptServicesFactory.prototype.getServicesVersion = function () {
-            return ts.servicesVersion;
-        };
-        TypeScriptServicesFactory.prototype.createLanguageServiceShim = function (host) {
-            try {
-                if (this.documentRegistry === undefined) {
-                    this.documentRegistry = ts.createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory());
-                }
-                var hostAdapter = new LanguageServiceShimHostAdapter(host);
-                var languageService = ts.createLanguageService(hostAdapter, this.documentRegistry);
-                return new LanguageServiceShimObject(this, host, languageService);
-            }
-            catch (err) {
-                logInternalError(host, err);
-                throw err;
-            }
-        };
-        TypeScriptServicesFactory.prototype.createClassifierShim = function (logger) {
-            try {
-                return new ClassifierShimObject(this, logger);
-            }
-            catch (err) {
-                logInternalError(logger, err);
-                throw err;
-            }
-        };
-        TypeScriptServicesFactory.prototype.createCoreServicesShim = function (host) {
-            try {
-                var adapter = new CoreServicesShimHostAdapter(host);
-                return new CoreServicesShimObject(this, host, adapter);
-            }
-            catch (err) {
-                logInternalError(host, err);
-                throw err;
-            }
-        };
-        TypeScriptServicesFactory.prototype.close = function () {
-            this._shims = [];
-            this.documentRegistry = undefined;
-        };
-        TypeScriptServicesFactory.prototype.registerShim = function (shim) {
-            this._shims.push(shim);
-        };
-        TypeScriptServicesFactory.prototype.unregisterShim = function (shim) {
-            for (var i = 0, n = this._shims.length; i < n; i++) {
-                if (this._shims[i] === shim) {
-                    delete this._shims[i];
-                    return;
-                }
-            }
-            throw new Error("Invalid operation");
-        };
-        return TypeScriptServicesFactory;
-    }());
-    ts.TypeScriptServicesFactory = TypeScriptServicesFactory;
-    if (typeof module !== "undefined" && module.exports) {
-        module.exports = ts;
-    }
-})(ts || (ts = {}));
-var TypeScript;
-(function (TypeScript) {
-    var Services;
-    (function (Services) {
-        Services.TypeScriptServicesFactory = ts.TypeScriptServicesFactory;
-    })(Services = TypeScript.Services || (TypeScript.Services = {}));
-})(TypeScript || (TypeScript = {}));
-var toolsVersion = "1.9";
+var __extends = (this && this.__extends) || function (d, b) {
+    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+};
+var ts;
+(function (ts) {
+    var OperationCanceledException = (function () {
+        function OperationCanceledException() {
+        }
+        return OperationCanceledException;
+    }());
+    ts.OperationCanceledException = OperationCanceledException;
+    (function (ExitStatus) {
+        ExitStatus[ExitStatus["Success"] = 0] = "Success";
+        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
+        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
+    })(ts.ExitStatus || (ts.ExitStatus = {}));
+    var ExitStatus = ts.ExitStatus;
+    (function (TypeReferenceSerializationKind) {
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithConstructSignatureAndValue"] = 1] = "TypeWithConstructSignatureAndValue";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["VoidType"] = 2] = "VoidType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["NumberLikeType"] = 3] = "NumberLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["StringLikeType"] = 4] = "StringLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["BooleanType"] = 5] = "BooleanType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ArrayLikeType"] = 6] = "ArrayLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ESSymbolType"] = 7] = "ESSymbolType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 8] = "TypeWithCallSignature";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 9] = "ObjectType";
+    })(ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
+    var TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind;
+    (function (DiagnosticCategory) {
+        DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
+        DiagnosticCategory[DiagnosticCategory["Error"] = 1] = "Error";
+        DiagnosticCategory[DiagnosticCategory["Message"] = 2] = "Message";
+    })(ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
+    var DiagnosticCategory = ts.DiagnosticCategory;
+    (function (ModuleResolutionKind) {
+        ModuleResolutionKind[ModuleResolutionKind["Classic"] = 1] = "Classic";
+        ModuleResolutionKind[ModuleResolutionKind["NodeJs"] = 2] = "NodeJs";
+    })(ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
+    var ModuleResolutionKind = ts.ModuleResolutionKind;
+    (function (ModuleKind) {
+        ModuleKind[ModuleKind["None"] = 0] = "None";
+        ModuleKind[ModuleKind["CommonJS"] = 1] = "CommonJS";
+        ModuleKind[ModuleKind["AMD"] = 2] = "AMD";
+        ModuleKind[ModuleKind["UMD"] = 3] = "UMD";
+        ModuleKind[ModuleKind["System"] = 4] = "System";
+        ModuleKind[ModuleKind["ES6"] = 5] = "ES6";
+        ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
+    })(ts.ModuleKind || (ts.ModuleKind = {}));
+    var ModuleKind = ts.ModuleKind;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function createFileMap(keyMapper) {
+        var files = {};
+        return {
+            get: get,
+            set: set,
+            contains: contains,
+            remove: remove,
+            forEachValue: forEachValueInMap,
+            clear: clear
+        };
+        function forEachValueInMap(f) {
+            for (var key in files) {
+                f(key, files[key]);
+            }
+        }
+        function get(path) {
+            return files[toKey(path)];
+        }
+        function set(path, value) {
+            files[toKey(path)] = value;
+        }
+        function contains(path) {
+            return hasProperty(files, toKey(path));
+        }
+        function remove(path) {
+            var key = toKey(path);
+            delete files[key];
+        }
+        function clear() {
+            files = {};
+        }
+        function toKey(path) {
+            return keyMapper ? keyMapper(path) : path;
+        }
+    }
+    ts.createFileMap = createFileMap;
+    function toPath(fileName, basePath, getCanonicalFileName) {
+        var nonCanonicalizedPath = isRootedDiskPath(fileName)
+            ? normalizePath(fileName)
+            : getNormalizedAbsolutePath(fileName, basePath);
+        return getCanonicalFileName(nonCanonicalizedPath);
+    }
+    ts.toPath = toPath;
+    function forEach(array, callback) {
+        if (array) {
+            for (var i = 0, len = array.length; i < len; i++) {
+                var result = callback(array[i], i);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.forEach = forEach;
+    function contains(array, value, areEqual) {
+        if (array) {
+            for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
+                var v = array_1[_i];
+                if (areEqual ? areEqual(v, value) : v === value) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+    ts.contains = contains;
+    function indexOf(array, value) {
+        if (array) {
+            for (var i = 0, len = array.length; i < len; i++) {
+                if (array[i] === value) {
+                    return i;
+                }
+            }
+        }
+        return -1;
+    }
+    ts.indexOf = indexOf;
+    function countWhere(array, predicate) {
+        var count = 0;
+        if (array) {
+            for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
+                var v = array_2[_i];
+                if (predicate(v)) {
+                    count++;
+                }
+            }
+        }
+        return count;
+    }
+    ts.countWhere = countWhere;
+    function filter(array, f) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_3 = array; _i < array_3.length; _i++) {
+                var item = array_3[_i];
+                if (f(item)) {
+                    result.push(item);
+                }
+            }
+        }
+        return result;
+    }
+    ts.filter = filter;
+    function map(array, f) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_4 = array; _i < array_4.length; _i++) {
+                var v = array_4[_i];
+                result.push(f(v));
+            }
+        }
+        return result;
+    }
+    ts.map = map;
+    function concatenate(array1, array2) {
+        if (!array2 || !array2.length)
+            return array1;
+        if (!array1 || !array1.length)
+            return array2;
+        return array1.concat(array2);
+    }
+    ts.concatenate = concatenate;
+    function deduplicate(array, areEqual) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
+                var item = array_5[_i];
+                if (!contains(result, item, areEqual)) {
+                    result.push(item);
+                }
+            }
+        }
+        return result;
+    }
+    ts.deduplicate = deduplicate;
+    function sum(array, prop) {
+        var result = 0;
+        for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
+            var v = array_6[_i];
+            result += v[prop];
+        }
+        return result;
+    }
+    ts.sum = sum;
+    function addRange(to, from) {
+        if (to && from) {
+            for (var _i = 0, from_1 = from; _i < from_1.length; _i++) {
+                var v = from_1[_i];
+                to.push(v);
+            }
+        }
+    }
+    ts.addRange = addRange;
+    function rangeEquals(array1, array2, pos, end) {
+        while (pos < end) {
+            if (array1[pos] !== array2[pos]) {
+                return false;
+            }
+            pos++;
+        }
+        return true;
+    }
+    ts.rangeEquals = rangeEquals;
+    function lastOrUndefined(array) {
+        if (array.length === 0) {
+            return undefined;
+        }
+        return array[array.length - 1];
+    }
+    ts.lastOrUndefined = lastOrUndefined;
+    function binarySearch(array, value) {
+        var low = 0;
+        var high = array.length - 1;
+        while (low <= high) {
+            var middle = low + ((high - low) >> 1);
+            var midValue = array[middle];
+            if (midValue === value) {
+                return middle;
+            }
+            else if (midValue > value) {
+                high = middle - 1;
+            }
+            else {
+                low = middle + 1;
+            }
+        }
+        return ~low;
+    }
+    ts.binarySearch = binarySearch;
+    function reduceLeft(array, f, initial) {
+        if (array) {
+            var count = array.length;
+            if (count > 0) {
+                var pos = 0;
+                var result = void 0;
+                if (arguments.length <= 2) {
+                    result = array[pos];
+                    pos++;
+                }
+                else {
+                    result = initial;
+                }
+                while (pos < count) {
+                    result = f(result, array[pos]);
+                    pos++;
+                }
+                return result;
+            }
+        }
+        return initial;
+    }
+    ts.reduceLeft = reduceLeft;
+    function reduceRight(array, f, initial) {
+        if (array) {
+            var pos = array.length - 1;
+            if (pos >= 0) {
+                var result = void 0;
+                if (arguments.length <= 2) {
+                    result = array[pos];
+                    pos--;
+                }
+                else {
+                    result = initial;
+                }
+                while (pos >= 0) {
+                    result = f(result, array[pos]);
+                    pos--;
+                }
+                return result;
+            }
+        }
+        return initial;
+    }
+    ts.reduceRight = reduceRight;
+    var hasOwnProperty = Object.prototype.hasOwnProperty;
+    function hasProperty(map, key) {
+        return hasOwnProperty.call(map, key);
+    }
+    ts.hasProperty = hasProperty;
+    function getKeys(map) {
+        var keys = [];
+        for (var key in map) {
+            keys.push(key);
+        }
+        return keys;
+    }
+    ts.getKeys = getKeys;
+    function getProperty(map, key) {
+        return hasOwnProperty.call(map, key) ? map[key] : undefined;
+    }
+    ts.getProperty = getProperty;
+    function isEmpty(map) {
+        for (var id in map) {
+            if (hasProperty(map, id)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.isEmpty = isEmpty;
+    function clone(object) {
+        var result = {};
+        for (var id in object) {
+            result[id] = object[id];
+        }
+        return result;
+    }
+    ts.clone = clone;
+    function extend(first, second) {
+        var result = {};
+        for (var id in first) {
+            result[id] = first[id];
+        }
+        for (var id in second) {
+            if (!hasProperty(result, id)) {
+                result[id] = second[id];
+            }
+        }
+        return result;
+    }
+    ts.extend = extend;
+    function forEachValue(map, callback) {
+        var result;
+        for (var id in map) {
+            if (result = callback(map[id]))
+                break;
+        }
+        return result;
+    }
+    ts.forEachValue = forEachValue;
+    function forEachKey(map, callback) {
+        var result;
+        for (var id in map) {
+            if (result = callback(id))
+                break;
+        }
+        return result;
+    }
+    ts.forEachKey = forEachKey;
+    function lookUp(map, key) {
+        return hasProperty(map, key) ? map[key] : undefined;
+    }
+    ts.lookUp = lookUp;
+    function copyMap(source, target) {
+        for (var p in source) {
+            target[p] = source[p];
+        }
+    }
+    ts.copyMap = copyMap;
+    function arrayToMap(array, makeKey) {
+        var result = {};
+        forEach(array, function (value) {
+            result[makeKey(value)] = value;
+        });
+        return result;
+    }
+    ts.arrayToMap = arrayToMap;
+    function reduceProperties(map, callback, initial) {
+        var result = initial;
+        if (map) {
+            for (var key in map) {
+                if (hasProperty(map, key)) {
+                    result = callback(result, map[key], String(key));
+                }
+            }
+        }
+        return result;
+    }
+    ts.reduceProperties = reduceProperties;
+    function isArray(value) {
+        return Array.isArray ? Array.isArray(value) : value instanceof Array;
+    }
+    ts.isArray = isArray;
+    function memoize(callback) {
+        var value;
+        return function () {
+            if (callback) {
+                value = callback();
+                callback = undefined;
+            }
+            return value;
+        };
+    }
+    ts.memoize = memoize;
+    function formatStringFromArgs(text, args, baseIndex) {
+        baseIndex = baseIndex || 0;
+        return text.replace(/{(\d+)}/g, function (match, index) { return args[+index + baseIndex]; });
+    }
+    ts.localizedDiagnosticMessages = undefined;
+    function getLocaleSpecificMessage(message) {
+        return ts.localizedDiagnosticMessages && ts.localizedDiagnosticMessages[message.key]
+            ? ts.localizedDiagnosticMessages[message.key]
+            : message.message;
+    }
+    ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
+    function createFileDiagnostic(file, start, length, message) {
+        var end = start + length;
+        Debug.assert(start >= 0, "start must be non-negative, is " + start);
+        Debug.assert(length >= 0, "length must be non-negative, is " + length);
+        if (file) {
+            Debug.assert(start <= file.text.length, "start must be within the bounds of the file. " + start + " > " + file.text.length);
+            Debug.assert(end <= file.text.length, "end must be the bounds of the file. " + end + " > " + file.text.length);
+        }
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 4) {
+            text = formatStringFromArgs(text, arguments, 4);
+        }
+        return {
+            file: file,
+            start: start,
+            length: length,
+            messageText: text,
+            category: message.category,
+            code: message.code
+        };
+    }
+    ts.createFileDiagnostic = createFileDiagnostic;
+    function formatMessage(dummy, message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 2) {
+            text = formatStringFromArgs(text, arguments, 2);
+        }
+        return text;
+    }
+    ts.formatMessage = formatMessage;
+    function createCompilerDiagnostic(message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 1) {
+            text = formatStringFromArgs(text, arguments, 1);
+        }
+        return {
+            file: undefined,
+            start: undefined,
+            length: undefined,
+            messageText: text,
+            category: message.category,
+            code: message.code
+        };
+    }
+    ts.createCompilerDiagnostic = createCompilerDiagnostic;
+    function chainDiagnosticMessages(details, message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 2) {
+            text = formatStringFromArgs(text, arguments, 2);
+        }
+        return {
+            messageText: text,
+            category: message.category,
+            code: message.code,
+            next: details
+        };
+    }
+    ts.chainDiagnosticMessages = chainDiagnosticMessages;
+    function concatenateDiagnosticMessageChains(headChain, tailChain) {
+        var lastChain = headChain;
+        while (lastChain.next) {
+            lastChain = lastChain.next;
+        }
+        lastChain.next = tailChain;
+        return headChain;
+    }
+    ts.concatenateDiagnosticMessageChains = concatenateDiagnosticMessageChains;
+    function compareValues(a, b) {
+        if (a === b)
+            return 0;
+        if (a === undefined)
+            return -1;
+        if (b === undefined)
+            return 1;
+        return a < b ? -1 : 1;
+    }
+    ts.compareValues = compareValues;
+    function getDiagnosticFileName(diagnostic) {
+        return diagnostic.file ? diagnostic.file.fileName : undefined;
+    }
+    function compareDiagnostics(d1, d2) {
+        return compareValues(getDiagnosticFileName(d1), getDiagnosticFileName(d2)) ||
+            compareValues(d1.start, d2.start) ||
+            compareValues(d1.length, d2.length) ||
+            compareValues(d1.code, d2.code) ||
+            compareMessageText(d1.messageText, d2.messageText) ||
+            0;
+    }
+    ts.compareDiagnostics = compareDiagnostics;
+    function compareMessageText(text1, text2) {
+        while (text1 && text2) {
+            var string1 = typeof text1 === "string" ? text1 : text1.messageText;
+            var string2 = typeof text2 === "string" ? text2 : text2.messageText;
+            var res = compareValues(string1, string2);
+            if (res) {
+                return res;
+            }
+            text1 = typeof text1 === "string" ? undefined : text1.next;
+            text2 = typeof text2 === "string" ? undefined : text2.next;
+        }
+        if (!text1 && !text2) {
+            return 0;
+        }
+        return text1 ? 1 : -1;
+    }
+    function sortAndDeduplicateDiagnostics(diagnostics) {
+        return deduplicateSortedDiagnostics(diagnostics.sort(compareDiagnostics));
+    }
+    ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
+    function deduplicateSortedDiagnostics(diagnostics) {
+        if (diagnostics.length < 2) {
+            return diagnostics;
+        }
+        var newDiagnostics = [diagnostics[0]];
+        var previousDiagnostic = diagnostics[0];
+        for (var i = 1; i < diagnostics.length; i++) {
+            var currentDiagnostic = diagnostics[i];
+            var isDupe = compareDiagnostics(currentDiagnostic, previousDiagnostic) === 0;
+            if (!isDupe) {
+                newDiagnostics.push(currentDiagnostic);
+                previousDiagnostic = currentDiagnostic;
+            }
+        }
+        return newDiagnostics;
+    }
+    ts.deduplicateSortedDiagnostics = deduplicateSortedDiagnostics;
+    function normalizeSlashes(path) {
+        return path.replace(/\\/g, "/");
+    }
+    ts.normalizeSlashes = normalizeSlashes;
+    function getRootLength(path) {
+        if (path.charCodeAt(0) === 47) {
+            if (path.charCodeAt(1) !== 47)
+                return 1;
+            var p1 = path.indexOf("/", 2);
+            if (p1 < 0)
+                return 2;
+            var p2 = path.indexOf("/", p1 + 1);
+            if (p2 < 0)
+                return p1 + 1;
+            return p2 + 1;
+        }
+        if (path.charCodeAt(1) === 58) {
+            if (path.charCodeAt(2) === 47)
+                return 3;
+            return 2;
+        }
+        if (path.lastIndexOf("file:///", 0) === 0) {
+            return "file:///".length;
+        }
+        var idx = path.indexOf("://");
+        if (idx !== -1) {
+            return idx + "://".length;
+        }
+        return 0;
+    }
+    ts.getRootLength = getRootLength;
+    ts.directorySeparator = "/";
+    function getNormalizedParts(normalizedSlashedPath, rootLength) {
+        var parts = normalizedSlashedPath.substr(rootLength).split(ts.directorySeparator);
+        var normalized = [];
+        for (var _i = 0, parts_1 = parts; _i < parts_1.length; _i++) {
+            var part = parts_1[_i];
+            if (part !== ".") {
+                if (part === ".." && normalized.length > 0 && lastOrUndefined(normalized) !== "..") {
+                    normalized.pop();
+                }
+                else {
+                    if (part) {
+                        normalized.push(part);
+                    }
+                }
+            }
+        }
+        return normalized;
+    }
+    function normalizePath(path) {
+        path = normalizeSlashes(path);
+        var rootLength = getRootLength(path);
+        var normalized = getNormalizedParts(path, rootLength);
+        return path.substr(0, rootLength) + normalized.join(ts.directorySeparator);
+    }
+    ts.normalizePath = normalizePath;
+    function getDirectoryPath(path) {
+        return path.substr(0, Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator)));
+    }
+    ts.getDirectoryPath = getDirectoryPath;
+    function isUrl(path) {
+        return path && !isRootedDiskPath(path) && path.indexOf("://") !== -1;
+    }
+    ts.isUrl = isUrl;
+    function isRootedDiskPath(path) {
+        return getRootLength(path) !== 0;
+    }
+    ts.isRootedDiskPath = isRootedDiskPath;
+    function normalizedPathComponents(path, rootLength) {
+        var normalizedParts = getNormalizedParts(path, rootLength);
+        return [path.substr(0, rootLength)].concat(normalizedParts);
+    }
+    function getNormalizedPathComponents(path, currentDirectory) {
+        path = normalizeSlashes(path);
+        var rootLength = getRootLength(path);
+        if (rootLength === 0) {
+            path = combinePaths(normalizeSlashes(currentDirectory), path);
+            rootLength = getRootLength(path);
+        }
+        return normalizedPathComponents(path, rootLength);
+    }
+    ts.getNormalizedPathComponents = getNormalizedPathComponents;
+    function getNormalizedAbsolutePath(fileName, currentDirectory) {
+        return getNormalizedPathFromPathComponents(getNormalizedPathComponents(fileName, currentDirectory));
+    }
+    ts.getNormalizedAbsolutePath = getNormalizedAbsolutePath;
+    function getNormalizedPathFromPathComponents(pathComponents) {
+        if (pathComponents && pathComponents.length) {
+            return pathComponents[0] + pathComponents.slice(1).join(ts.directorySeparator);
+        }
+    }
+    ts.getNormalizedPathFromPathComponents = getNormalizedPathFromPathComponents;
+    function getNormalizedPathComponentsOfUrl(url) {
+        var urlLength = url.length;
+        var rootLength = url.indexOf("://") + "://".length;
+        while (rootLength < urlLength) {
+            if (url.charCodeAt(rootLength) === 47) {
+                rootLength++;
+            }
+            else {
+                break;
+            }
+        }
+        if (rootLength === urlLength) {
+            return [url];
+        }
+        var indexOfNextSlash = url.indexOf(ts.directorySeparator, rootLength);
+        if (indexOfNextSlash !== -1) {
+            rootLength = indexOfNextSlash + 1;
+            return normalizedPathComponents(url, rootLength);
+        }
+        else {
+            return [url + ts.directorySeparator];
+        }
+    }
+    function getNormalizedPathOrUrlComponents(pathOrUrl, currentDirectory) {
+        if (isUrl(pathOrUrl)) {
+            return getNormalizedPathComponentsOfUrl(pathOrUrl);
+        }
+        else {
+            return getNormalizedPathComponents(pathOrUrl, currentDirectory);
+        }
+    }
+    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
+        var pathComponents = getNormalizedPathOrUrlComponents(relativeOrAbsolutePath, currentDirectory);
+        var directoryComponents = getNormalizedPathOrUrlComponents(directoryPathOrUrl, currentDirectory);
+        if (directoryComponents.length > 1 && lastOrUndefined(directoryComponents) === "") {
+            directoryComponents.length--;
+        }
+        var joinStartIndex;
+        for (joinStartIndex = 0; joinStartIndex < pathComponents.length && joinStartIndex < directoryComponents.length; joinStartIndex++) {
+            if (getCanonicalFileName(directoryComponents[joinStartIndex]) !== getCanonicalFileName(pathComponents[joinStartIndex])) {
+                break;
+            }
+        }
+        if (joinStartIndex) {
+            var relativePath = "";
+            var relativePathComponents = pathComponents.slice(joinStartIndex, pathComponents.length);
+            for (; joinStartIndex < directoryComponents.length; joinStartIndex++) {
+                if (directoryComponents[joinStartIndex] !== "") {
+                    relativePath = relativePath + ".." + ts.directorySeparator;
+                }
+            }
+            return relativePath + relativePathComponents.join(ts.directorySeparator);
+        }
+        var absolutePath = getNormalizedPathFromPathComponents(pathComponents);
+        if (isAbsolutePathAnUrl && isRootedDiskPath(absolutePath)) {
+            absolutePath = "file:///" + absolutePath;
+        }
+        return absolutePath;
+    }
+    ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
+    function getBaseFileName(path) {
+        if (path === undefined) {
+            return undefined;
+        }
+        var i = path.lastIndexOf(ts.directorySeparator);
+        return i < 0 ? path : path.substring(i + 1);
+    }
+    ts.getBaseFileName = getBaseFileName;
+    function combinePaths(path1, path2) {
+        if (!(path1 && path1.length))
+            return path2;
+        if (!(path2 && path2.length))
+            return path1;
+        if (getRootLength(path2) !== 0)
+            return path2;
+        if (path1.charAt(path1.length - 1) === ts.directorySeparator)
+            return path1 + path2;
+        return path1 + ts.directorySeparator + path2;
+    }
+    ts.combinePaths = combinePaths;
+    function fileExtensionIs(path, extension) {
+        var pathLen = path.length;
+        var extLen = extension.length;
+        return pathLen > extLen && path.substr(pathLen - extLen, extLen) === extension;
+    }
+    ts.fileExtensionIs = fileExtensionIs;
+    function ensureScriptKind(fileName, scriptKind) {
+        return (scriptKind || getScriptKindFromFileName(fileName)) || 3;
+    }
+    ts.ensureScriptKind = ensureScriptKind;
+    function getScriptKindFromFileName(fileName) {
+        var ext = fileName.substr(fileName.lastIndexOf("."));
+        switch (ext.toLowerCase()) {
+            case ".js":
+                return 1;
+            case ".jsx":
+                return 2;
+            case ".ts":
+                return 3;
+            case ".tsx":
+                return 4;
+            default:
+                return 0;
+        }
+    }
+    ts.getScriptKindFromFileName = getScriptKindFromFileName;
+    ts.supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
+    ts.supportedJavascriptExtensions = [".js", ".jsx"];
+    var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
+    function getSupportedExtensions(options) {
+        return options && options.allowJs ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
+    }
+    ts.getSupportedExtensions = getSupportedExtensions;
+    function isSupportedSourceFileName(fileName, compilerOptions) {
+        if (!fileName) {
+            return false;
+        }
+        for (var _i = 0, _a = getSupportedExtensions(compilerOptions); _i < _a.length; _i++) {
+            var extension = _a[_i];
+            if (fileExtensionIs(fileName, extension)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.isSupportedSourceFileName = isSupportedSourceFileName;
+    var extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
+    function removeFileExtension(path) {
+        for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
+            var ext = extensionsToRemove_1[_i];
+            var extensionless = tryRemoveExtension(path, ext);
+            if (extensionless !== undefined) {
+                return extensionless;
+            }
+        }
+        return path;
+    }
+    ts.removeFileExtension = removeFileExtension;
+    function tryRemoveExtension(path, extension) {
+        return fileExtensionIs(path, extension) ? path.substring(0, path.length - extension.length) : undefined;
+    }
+    ts.tryRemoveExtension = tryRemoveExtension;
+    function isJsxOrTsxExtension(ext) {
+        return ext === ".jsx" || ext === ".tsx";
+    }
+    ts.isJsxOrTsxExtension = isJsxOrTsxExtension;
+    function Symbol(flags, name) {
+        this.flags = flags;
+        this.name = name;
+        this.declarations = undefined;
+    }
+    function Type(checker, flags) {
+        this.flags = flags;
+    }
+    function Signature(checker) {
+    }
+    function Node(kind, pos, end) {
+        this.kind = kind;
+        this.pos = pos;
+        this.end = end;
+        this.flags = 0;
+        this.parent = undefined;
+    }
+    ts.objectAllocator = {
+        getNodeConstructor: function () { return Node; },
+        getSourceFileConstructor: function () { return Node; },
+        getSymbolConstructor: function () { return Symbol; },
+        getTypeConstructor: function () { return Type; },
+        getSignatureConstructor: function () { return Signature; }
+    };
+    var Debug;
+    (function (Debug) {
+        var currentAssertionLevel = 0;
+        function shouldAssert(level) {
+            return currentAssertionLevel >= level;
+        }
+        Debug.shouldAssert = shouldAssert;
+        function assert(expression, message, verboseDebugInfo) {
+            if (!expression) {
+                var verboseDebugString = "";
+                if (verboseDebugInfo) {
+                    verboseDebugString = "\r\nVerbose Debug Information: " + verboseDebugInfo();
+                }
+                debugger;
+                throw new Error("Debug Failure. False expression: " + (message || "") + verboseDebugString);
+            }
+        }
+        Debug.assert = assert;
+        function fail(message) {
+            Debug.assert(false, message);
+        }
+        Debug.fail = fail;
+    })(Debug = ts.Debug || (ts.Debug = {}));
+    function copyListRemovingItem(item, list) {
+        var copiedList = [];
+        for (var _i = 0, list_1 = list; _i < list_1.length; _i++) {
+            var e = list_1[_i];
+            if (e !== item) {
+                copiedList.push(e);
+            }
+        }
+        return copiedList;
+    }
+    ts.copyListRemovingItem = copyListRemovingItem;
+    function createGetCanonicalFileName(useCaseSensitivefileNames) {
+        return useCaseSensitivefileNames
+            ? (function (fileName) { return fileName; })
+            : (function (fileName) { return fileName.toLowerCase(); });
+    }
+    ts.createGetCanonicalFileName = createGetCanonicalFileName;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.sys = (function () {
+        function getWScriptSystem() {
+            var fso = new ActiveXObject("Scripting.FileSystemObject");
+            var fileStream = new ActiveXObject("ADODB.Stream");
+            fileStream.Type = 2;
+            var binaryStream = new ActiveXObject("ADODB.Stream");
+            binaryStream.Type = 1;
+            var args = [];
+            for (var i = 0; i < WScript.Arguments.length; i++) {
+                args[i] = WScript.Arguments.Item(i);
+            }
+            function readFile(fileName, encoding) {
+                if (!fso.FileExists(fileName)) {
+                    return undefined;
+                }
+                fileStream.Open();
+                try {
+                    if (encoding) {
+                        fileStream.Charset = encoding;
+                        fileStream.LoadFromFile(fileName);
+                    }
+                    else {
+                        fileStream.Charset = "x-ansi";
+                        fileStream.LoadFromFile(fileName);
+                        var bom = fileStream.ReadText(2) || "";
+                        fileStream.Position = 0;
+                        fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
+                    }
+                    return fileStream.ReadText();
+                }
+                catch (e) {
+                    throw e;
+                }
+                finally {
+                    fileStream.Close();
+                }
+            }
+            function writeFile(fileName, data, writeByteOrderMark) {
+                fileStream.Open();
+                binaryStream.Open();
+                try {
+                    fileStream.Charset = "utf-8";
+                    fileStream.WriteText(data);
+                    if (writeByteOrderMark) {
+                        fileStream.Position = 0;
+                    }
+                    else {
+                        fileStream.Position = 3;
+                    }
+                    fileStream.CopyTo(binaryStream);
+                    binaryStream.SaveToFile(fileName, 2);
+                }
+                finally {
+                    binaryStream.Close();
+                    fileStream.Close();
+                }
+            }
+            function getCanonicalPath(path) {
+                return path.toLowerCase();
+            }
+            function getNames(collection) {
+                var result = [];
+                for (var e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
+                    result.push(e.item().Name);
+                }
+                return result.sort();
+            }
+            function getDirectories(path) {
+                var folder = fso.GetFolder(path);
+                return getNames(folder.subfolders);
+            }
+            function readDirectory(path, extension, exclude) {
+                var result = [];
+                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
+                visitDirectory(path);
+                return result;
+                function visitDirectory(path) {
+                    var folder = fso.GetFolder(path || ".");
+                    var files = getNames(folder.files);
+                    for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
+                        var current = files_1[_i];
+                        var name_1 = ts.combinePaths(path, current);
+                        if ((!extension || ts.fileExtensionIs(name_1, extension)) && !ts.contains(exclude, getCanonicalPath(name_1))) {
+                            result.push(name_1);
+                        }
+                    }
+                    var subfolders = getNames(folder.subfolders);
+                    for (var _a = 0, subfolders_1 = subfolders; _a < subfolders_1.length; _a++) {
+                        var current = subfolders_1[_a];
+                        var name_2 = ts.combinePaths(path, current);
+                        if (!ts.contains(exclude, getCanonicalPath(name_2))) {
+                            visitDirectory(name_2);
+                        }
+                    }
+                }
+            }
+            return {
+                args: args,
+                newLine: "\r\n",
+                useCaseSensitiveFileNames: false,
+                write: function (s) {
+                    WScript.StdOut.Write(s);
+                },
+                readFile: readFile,
+                writeFile: writeFile,
+                resolvePath: function (path) {
+                    return fso.GetAbsolutePathName(path);
+                },
+                fileExists: function (path) {
+                    return fso.FileExists(path);
+                },
+                directoryExists: function (path) {
+                    return fso.FolderExists(path);
+                },
+                createDirectory: function (directoryName) {
+                    if (!this.directoryExists(directoryName)) {
+                        fso.CreateFolder(directoryName);
+                    }
+                },
+                getExecutingFilePath: function () {
+                    return WScript.ScriptFullName;
+                },
+                getCurrentDirectory: function () {
+                    return new ActiveXObject("WScript.Shell").CurrentDirectory;
+                },
+                getDirectories: getDirectories,
+                readDirectory: readDirectory,
+                exit: function (exitCode) {
+                    try {
+                        WScript.Quit(exitCode);
+                    }
+                    catch (e) {
+                    }
+                }
+            };
+        }
+        function getNodeSystem() {
+            var _fs = require("fs");
+            var _path = require("path");
+            var _os = require("os");
+            var _crypto = require("crypto");
+            var useNonPollingWatchers = process.env["TSC_NONPOLLING_WATCHER"];
+            function createWatchedFileSet() {
+                var dirWatchers = {};
+                var fileWatcherCallbacks = {};
+                return { addFile: addFile, removeFile: removeFile };
+                function reduceDirWatcherRefCountForFile(fileName) {
+                    var dirName = ts.getDirectoryPath(fileName);
+                    if (ts.hasProperty(dirWatchers, dirName)) {
+                        var watcher = dirWatchers[dirName];
+                        watcher.referenceCount -= 1;
+                        if (watcher.referenceCount <= 0) {
+                            watcher.close();
+                            delete dirWatchers[dirName];
+                        }
+                    }
+                }
+                function addDirWatcher(dirPath) {
+                    if (ts.hasProperty(dirWatchers, dirPath)) {
+                        var watcher_1 = dirWatchers[dirPath];
+                        watcher_1.referenceCount += 1;
+                        return;
+                    }
+                    var watcher = _fs.watch(dirPath, { persistent: true }, function (eventName, relativeFileName) { return fileEventHandler(eventName, relativeFileName, dirPath); });
+                    watcher.referenceCount = 1;
+                    dirWatchers[dirPath] = watcher;
+                    return;
+                }
+                function addFileWatcherCallback(filePath, callback) {
+                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
+                        fileWatcherCallbacks[filePath].push(callback);
+                    }
+                    else {
+                        fileWatcherCallbacks[filePath] = [callback];
+                    }
+                }
+                function addFile(fileName, callback) {
+                    addFileWatcherCallback(fileName, callback);
+                    addDirWatcher(ts.getDirectoryPath(fileName));
+                    return { fileName: fileName, callback: callback };
+                }
+                function removeFile(watchedFile) {
+                    removeFileWatcherCallback(watchedFile.fileName, watchedFile.callback);
+                    reduceDirWatcherRefCountForFile(watchedFile.fileName);
+                }
+                function removeFileWatcherCallback(filePath, callback) {
+                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
+                        var newCallbacks = ts.copyListRemovingItem(callback, fileWatcherCallbacks[filePath]);
+                        if (newCallbacks.length === 0) {
+                            delete fileWatcherCallbacks[filePath];
+                        }
+                        else {
+                            fileWatcherCallbacks[filePath] = newCallbacks;
+                        }
+                    }
+                }
+                function fileEventHandler(eventName, relativeFileName, baseDirPath) {
+                    var fileName = typeof relativeFileName !== "string"
+                        ? undefined
+                        : ts.getNormalizedAbsolutePath(relativeFileName, baseDirPath);
+                    if ((eventName === "change" || eventName === "rename") && ts.hasProperty(fileWatcherCallbacks, fileName)) {
+                        for (var _i = 0, _a = fileWatcherCallbacks[fileName]; _i < _a.length; _i++) {
+                            var fileCallback = _a[_i];
+                            fileCallback(fileName);
+                        }
+                    }
+                }
+            }
+            var watchedFileSet = createWatchedFileSet();
+            function isNode4OrLater() {
+                return parseInt(process.version.charAt(1)) >= 4;
+            }
+            var platform = _os.platform();
+            var useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
+            function readFile(fileName, encoding) {
+                if (!fileExists(fileName)) {
+                    return undefined;
+                }
+                var buffer = _fs.readFileSync(fileName);
+                var len = buffer.length;
+                if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
+                    len &= ~1;
+                    for (var i = 0; i < len; i += 2) {
+                        var temp = buffer[i];
+                        buffer[i] = buffer[i + 1];
+                        buffer[i + 1] = temp;
+                    }
+                    return buffer.toString("utf16le", 2);
+                }
+                if (len >= 2 && buffer[0] === 0xFF && buffer[1] === 0xFE) {
+                    return buffer.toString("utf16le", 2);
+                }
+                if (len >= 3 && buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
+                    return buffer.toString("utf8", 3);
+                }
+                return buffer.toString("utf8");
+            }
+            function writeFile(fileName, data, writeByteOrderMark) {
+                if (writeByteOrderMark) {
+                    data = "\uFEFF" + data;
+                }
+                var fd;
+                try {
+                    fd = _fs.openSync(fileName, "w");
+                    _fs.writeSync(fd, data, undefined, "utf8");
+                }
+                finally {
+                    if (fd !== undefined) {
+                        _fs.closeSync(fd);
+                    }
+                }
+            }
+            function getCanonicalPath(path) {
+                return useCaseSensitiveFileNames ? path : path.toLowerCase();
+            }
+            function fileSystemEntryExists(path, entryKind) {
+                try {
+                    var stat = _fs.statSync(path);
+                    switch (entryKind) {
+                        case 0: return stat.isFile();
+                        case 1: return stat.isDirectory();
+                    }
+                }
+                catch (e) {
+                    return false;
+                }
+            }
+            function fileExists(path) {
+                return fileSystemEntryExists(path, 0);
+            }
+            function directoryExists(path) {
+                return fileSystemEntryExists(path, 1);
+            }
+            function getDirectories(path) {
+                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1); });
+            }
+            function readDirectory(path, extension, exclude) {
+                var result = [];
+                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
+                visitDirectory(path);
+                return result;
+                function visitDirectory(path) {
+                    var files = _fs.readdirSync(path || ".").sort();
+                    var directories = [];
+                    for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
+                        var current = files_2[_i];
+                        if (current === "." || current === "..") {
+                            continue;
+                        }
+                        var name_3 = ts.combinePaths(path, current);
+                        if (!ts.contains(exclude, getCanonicalPath(name_3))) {
+                            var stat = _fs.statSync(name_3);
+                            if (stat.isFile()) {
+                                if (!extension || ts.fileExtensionIs(name_3, extension)) {
+                                    result.push(name_3);
+                                }
+                            }
+                            else if (stat.isDirectory()) {
+                                directories.push(name_3);
+                            }
+                        }
+                    }
+                    for (var _a = 0, directories_1 = directories; _a < directories_1.length; _a++) {
+                        var current = directories_1[_a];
+                        visitDirectory(current);
+                    }
+                }
+            }
+            return {
+                args: process.argv.slice(2),
+                newLine: _os.EOL,
+                useCaseSensitiveFileNames: useCaseSensitiveFileNames,
+                write: function (s) {
+                    process.stdout.write(s);
+                },
+                readFile: readFile,
+                writeFile: writeFile,
+                watchFile: function (fileName, callback) {
+                    if (useNonPollingWatchers) {
+                        var watchedFile_1 = watchedFileSet.addFile(fileName, callback);
+                        return {
+                            close: function () { return watchedFileSet.removeFile(watchedFile_1); }
+                        };
+                    }
+                    else {
+                        _fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
+                        return {
+                            close: function () { return _fs.unwatchFile(fileName, fileChanged); }
+                        };
+                    }
+                    function fileChanged(curr, prev) {
+                        if (+curr.mtime <= +prev.mtime) {
+                            return;
+                        }
+                        callback(fileName);
+                    }
+                },
+                watchDirectory: function (directoryName, callback, recursive) {
+                    var options;
+                    if (isNode4OrLater() && (process.platform === "win32" || process.platform === "darwin")) {
+                        options = { persistent: true, recursive: !!recursive };
+                    }
+                    else {
+                        options = { persistent: true };
+                    }
+                    return _fs.watch(directoryName, options, function (eventName, relativeFileName) {
+                        if (eventName === "rename") {
+                            callback(!relativeFileName ? relativeFileName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
+                        }
+                        ;
+                    });
+                },
+                resolvePath: function (path) {
+                    return _path.resolve(path);
+                },
+                fileExists: fileExists,
+                directoryExists: directoryExists,
+                createDirectory: function (directoryName) {
+                    if (!this.directoryExists(directoryName)) {
+                        _fs.mkdirSync(directoryName);
+                    }
+                },
+                getExecutingFilePath: function () {
+                    return __filename;
+                },
+                getCurrentDirectory: function () {
+                    return process.cwd();
+                },
+                getDirectories: getDirectories,
+                readDirectory: readDirectory,
+                getModifiedTime: function (path) {
+                    try {
+                        return _fs.statSync(path).mtime;
+                    }
+                    catch (e) {
+                        return undefined;
+                    }
+                },
+                createHash: function (data) {
+                    var hash = _crypto.createHash("md5");
+                    hash.update(data);
+                    return hash.digest("hex");
+                },
+                getMemoryUsage: function () {
+                    if (global.gc) {
+                        global.gc();
+                    }
+                    return process.memoryUsage().heapUsed;
+                },
+                exit: function (exitCode) {
+                    process.exit(exitCode);
+                },
+                realpath: function (path) {
+                    return _fs.realpathSync(path);
+                }
+            };
+        }
+        function getChakraSystem() {
+            var realpath = ChakraHost.realpath && (function (path) { return ChakraHost.realpath(path); });
+            return {
+                newLine: ChakraHost.newLine || "\r\n",
+                args: ChakraHost.args,
+                useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
+                write: ChakraHost.echo,
+                readFile: function (path, encoding) {
+                    return ChakraHost.readFile(path);
+                },
+                writeFile: function (path, data, writeByteOrderMark) {
+                    if (writeByteOrderMark) {
+                        data = "\uFEFF" + data;
+                    }
+                    ChakraHost.writeFile(path, data);
+                },
+                resolvePath: ChakraHost.resolvePath,
+                fileExists: ChakraHost.fileExists,
+                directoryExists: ChakraHost.directoryExists,
+                createDirectory: ChakraHost.createDirectory,
+                getExecutingFilePath: function () { return ChakraHost.executingFile; },
+                getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
+                getDirectories: ChakraHost.getDirectories,
+                readDirectory: ChakraHost.readDirectory,
+                exit: ChakraHost.quit,
+                realpath: realpath
+            };
+        }
+        if (typeof ChakraHost !== "undefined") {
+            return getChakraSystem();
+        }
+        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
+            return getWScriptSystem();
+        }
+        else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
+            return getNodeSystem();
+        }
+        else {
+            return undefined;
+        }
+    })();
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.Diagnostics = {
+        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
+        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
+        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
+        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
+        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
+        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
+        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
+        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
+        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
+        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
+        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
+        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
+        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
+        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
+        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
+        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
+        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
+        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
+        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
+        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
+        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
+        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
+        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
+        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
+        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
+        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
+        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
+        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
+        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
+        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
+        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
+        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
+        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
+        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
+        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
+        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
+        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
+        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
+        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
+        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
+        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
+        Type_0_is_not_a_valid_async_function_return_type: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_1055", message: "Type '{0}' is not a valid async function return type." },
+        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
+        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
+        Operand_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "Operand_for_await_does_not_have_a_valid_callable_then_member_1058", message: "Operand for 'await' does not have a valid callable 'then' member." },
+        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: { code: 1059, category: ts.DiagnosticCategory.Error, key: "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059", message: "Return expression in async function does not have a valid callable 'then' member." },
+        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: { code: 1060, category: ts.DiagnosticCategory.Error, key: "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060", message: "Expression body for async arrow function does not have a valid callable 'then' member." },
+        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
+        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
+        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
+        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
+        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
+        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
+        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
+        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
+        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
+        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
+        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher." },
+        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
+        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
+        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
+        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
+        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
+        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
+        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
+        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
+        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
+        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
+        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
+        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
+        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
+        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
+        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
+        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
+        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
+        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
+        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
+        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
+        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
+        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'" },
+        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
+        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
+        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
+        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
+        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
+        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
+        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
+        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
+        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
+        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
+        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
+        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
+        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
+        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
+        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
+        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
+        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
+        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
+        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
+        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
+        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
+        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
+        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
+        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
+        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
+        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
+        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
+        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
+        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
+        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
+        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
+        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
+        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
+        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
+        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
+        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
+        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
+        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
+        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
+        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
+        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
+        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
+        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
+        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
+        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
+        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
+        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
+        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
+        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
+        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
+        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
+        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
+        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
+        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
+        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
+        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
+        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
+        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
+        A_parameter_property_may_not_be_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_a_binding_pattern_1187", message: "A parameter property may not be a binding pattern." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
+        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
+        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
+        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
+        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
+        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
+        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
+        Catch_clause_variable_name_must_be_an_identifier: { code: 1195, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_name_must_be_an_identifier_1195", message: "Catch clause variable name must be an identifier." },
+        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
+        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
+        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
+        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
+        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asteri_1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_defaul_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
+        Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
+        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
+        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
+        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
+        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
+        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
+        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name" },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode" },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
+        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
+        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
+        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
+        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
+        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
+        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
+        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
+        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
+        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
+        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
+        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
+        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
+        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
+        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
+        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
+        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
+        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
+        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
+        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
+        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
+        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
+        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
+        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
+        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
+        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
+        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
+        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
+        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
+        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
+        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
+        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
+        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
+        _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: { code: 1253, category: ts.DiagnosticCategory.Error, key: "_0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag_1253", message: "'{0}' tag cannot be used independently as a top level JSDoc tag." },
+        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
+        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
+        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
+        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
+        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
+        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
+        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
+        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
+        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
+        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
+        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
+        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
+        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
+        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
+        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
+        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
+        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
+        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
+        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
+        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
+        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
+        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
+        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
+        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
+        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
+        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
+        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
+        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
+        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
+        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
+        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
+        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
+        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
+        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
+        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
+        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
+        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
+        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
+        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
+        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
+        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
+        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
+        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
+        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
+        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
+        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
+        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
+        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
+        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
+        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
+        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
+        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
+        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
+        Supplied_parameters_do_not_match_any_signature_of_call_target: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Supplied_parameters_do_not_match_any_signature_of_call_target_2346", message: "Supplied parameters do not match any signature of call target." },
+        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
+        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
+        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_2349", message: "Cannot invoke an expression whose type lacks a call signature." },
+        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
+        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
+        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
+        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
+        No_best_common_type_exists_among_return_expressions: { code: 2354, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_return_expressions_2354", message: "No best common type exists among return expressions." },
+        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
+        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
+        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357", message: "The operand of an increment or decrement operator must be a variable, property or indexer." },
+        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
+        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
+        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
+        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter" },
+        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_of_assignment_expression_2364", message: "Invalid left-hand side of assignment expression." },
+        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
+        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
+        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'" },
+        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
+        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
+        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
+        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
+        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
+        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
+        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
+        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
+        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
+        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
+        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
+        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
+        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
+        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
+        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
+        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
+        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
+        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
+        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
+        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
+        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
+        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
+        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
+        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
+        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
+        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
+        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
+        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
+        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
+        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
+        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
+        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
+        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
+        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
+        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
+        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
+        Invalid_left_hand_side_in_for_in_statement: { code: 2406, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_in_statement_2406", message: "Invalid left-hand side in 'for...in' statement." },
+        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
+        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
+        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class" },
+        All_symbols_within_a_with_block_will_be_resolved_to_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "All_symbols_within_a_with_block_will_be_resolved_to_any_2410", message: "All symbols within a 'with' block will be resolved to 'any'." },
+        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
+        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
+        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
+        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'" },
+        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
+        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
+        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
+        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
+        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
+        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
+        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'" },
+        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
+        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
+        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'" },
+        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
+        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged" },
+        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged" },
+        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
+        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
+        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name" },
+        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'" },
+        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
+        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'" },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
+        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
+        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
+        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
+        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
+        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
+        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
+        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
+        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: { code: 2449, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449", message: "The operand of an increment or decrement operator cannot be a constant or a read-only property." },
+        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450", message: "Left-hand side of assignment expression cannot be a constant or a read-only property." },
+        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
+        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
+        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
+        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
+        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
+        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
+        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'" },
+        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
+        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
+        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
+        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
+        A_rest_element_must_be_last_in_an_array_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462", message: "A rest element must be last in an array destructuring pattern" },
+        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
+        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
+        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
+        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
+        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
+        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
+        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
+        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
+        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
+        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
+        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
+        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
+        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
+        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
+        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
+        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
+        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
+        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
+        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
+        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
+        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'" },
+        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2485, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485", message: "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property." },
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2486, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486", message: "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property." },
+        Invalid_left_hand_side_in_for_of_statement: { code: 2487, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_of_statement_2487", message: "Invalid left-hand side in 'for...of' statement." },
+        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
+        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
+        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
+        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause" },
+        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
+        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
+        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
+        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
+        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
+        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
+        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
+        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
+        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
+        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
+        No_best_common_type_exists_among_yield_expressions: { code: 2504, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_yield_expressions_2504", message: "No best common type exists among yield expressions." },
+        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
+        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
+        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
+        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
+        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
+        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
+        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
+        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
+        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
+        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
+        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
+        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
+        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
+        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
+        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
+        The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_function_expression: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_2522", message: "The 'arguments' object cannot be referenced in an async arrow function. Consider using a standard async function expression." },
+        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
+        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
+        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
+        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
+        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
+        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
+        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
+        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
+        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
+        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
+        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
+        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
+        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
+        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
+        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'" },
+        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
+        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
+        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
+        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property" },
+        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property" },
+        Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: ts.DiagnosticCategory.Error, key: "Cannot_emit_namespaced_JSX_elements_in_React_2650", message: "Cannot emit namespaced JSX elements in React" },
+        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
+        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
+        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
+        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
+        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
+        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element" },
+        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'" },
+        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
+        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
+        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
+        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
+        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
+        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
+        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
+        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
+        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
+        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
+        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
+        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
+        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
+        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
+        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
+        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
+        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
+        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
+        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
+        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: { code: 2679, category: ts.DiagnosticCategory.Error, key: "A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void_2679", message: "A function that is called with the 'new' keyword cannot have a 'this' type that is 'void'." },
+        A_this_parameter_must_be_the_first_parameter: { code: 2680, category: ts.DiagnosticCategory.Error, key: "A_this_parameter_must_be_the_first_parameter_2680", message: "A 'this' parameter must be the first parameter." },
+        A_constructor_cannot_have_a_this_parameter: { code: 2681, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_have_a_this_parameter_2681", message: "A constructor cannot have a 'this' parameter." },
+        get_and_set_accessor_must_have_the_same_this_type: { code: 2682, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_this_type_2682", message: "'get' and 'set' accessor must have the same 'this' type." },
+        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
+        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
+        The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
+        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
+        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
+        Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
+        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4006, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4006", message: "Type parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4008, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4008", message: "Type parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4010, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4010", message: "Type parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4012, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4012", message: "Type parameter '{0}' of public method from exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4014, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", message: "Type parameter '{0}' of method from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4016, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", message: "Type parameter '{0}' of exported function has or is using private name '{1}'." },
+        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4019, category: ts.DiagnosticCategory.Error, key: "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", message: "Implements clause of exported class '{0}' has or is using private name '{1}'." },
+        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
+        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "Extends clause of exported interface '{0}' has or is using private name '{1}'." },
+        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4023, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", message: "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named." },
+        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: { code: 4024, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", message: "Exported variable '{0}' has or is using name '{1}' from private module '{2}'." },
+        Exported_variable_0_has_or_is_using_private_name_1: { code: 4025, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_private_name_1_4025", message: "Exported variable '{0}' has or is using private name '{1}'." },
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4026, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026", message: "Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4027, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4027", message: "Public static property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
+        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4028, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_private_name_1_4028", message: "Public static property '{0}' of exported class has or is using private name '{1}'." },
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4029, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029", message: "Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4030, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4030", message: "Public property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
+        Public_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4031, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_private_name_1_4031", message: "Public property '{0}' of exported class has or is using private name '{1}'." },
+        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4032, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4032", message: "Property '{0}' of exported interface has or is using name '{1}' from private module '{2}'." },
+        Property_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4033, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_private_name_1_4033", message: "Property '{0}' of exported interface has or is using private name '{1}'." },
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4034, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_4034", message: "Parameter '{0}' of public static property setter from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4035, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1_4035", message: "Parameter '{0}' of public static property setter from exported class has or is using private name '{1}'." },
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4036, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_4036", message: "Parameter '{0}' of public property setter from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4037, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1_4037", message: "Parameter '{0}' of public property setter from exported class has or is using private name '{1}'." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4038, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_externa_4038", message: "Return type of public static property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4039, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_4039", message: "Return type of public static property getter from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4040, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0_4040", message: "Return type of public static property getter from exported class has or is using private name '{0}'." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4041, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_modul_4041", message: "Return type of public property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4042, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_4042", message: "Return type of public property getter from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4043, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0_4043", message: "Return type of public property getter from exported class has or is using private name '{0}'." },
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4044, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_mod_4044", message: "Return type of constructor signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4045, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0_4045", message: "Return type of constructor signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4046, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4046", message: "Return type of call signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4047, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0_4047", message: "Return type of call signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4048, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4048", message: "Return type of index signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4049, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0_4049", message: "Return type of index signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4050, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module__4050", message: "Return type of public static method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4051, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4051", message: "Return type of public static method from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: { code: 4052, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0_4052", message: "Return type of public static method from exported class has or is using private name '{0}'." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4053, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_c_4053", message: "Return type of public method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4054, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4054", message: "Return type of public method from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: { code: 4055, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0_4055", message: "Return type of public method from exported class has or is using private name '{0}'." },
+        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4056, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4056", message: "Return type of method from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: { code: 4057, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0_4057", message: "Return type of method from exported interface has or is using private name '{0}'." },
+        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4058, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named_4058", message: "Return type of exported function has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: { code: 4059, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1_4059", message: "Return type of exported function has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_exported_function_has_or_is_using_private_name_0: { code: 4060, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_private_name_0_4060", message: "Return type of exported function has or is using private name '{0}'." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4061, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_can_4061", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4062, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2_4062", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: { code: 4063, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1_4063", message: "Parameter '{0}' of constructor from exported class has or is using private name '{1}'." },
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4064, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_mod_4064", message: "Parameter '{0}' of constructor signature from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4065, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4065", message: "Parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4066, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4066", message: "Parameter '{0}' of call signature from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4067, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4067", message: "Parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4068, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module__4068", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4069, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4069", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4070, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4070", message: "Parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4071, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_c_4071", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4072, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4072", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4073, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4073", message: "Parameter '{0}' of public method from exported class has or is using private name '{1}'." },
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4074, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4074", message: "Parameter '{0}' of method from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4075, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4075", message: "Parameter '{0}' of method from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4076, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4076", message: "Parameter '{0}' of exported function has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: { code: 4077, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2_4077", message: "Parameter '{0}' of exported function has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4078, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", message: "Parameter '{0}' of exported function has or is using private name '{1}'." },
+        Exported_type_alias_0_has_or_is_using_private_name_1: { code: 4081, category: ts.DiagnosticCategory.Error, key: "Exported_type_alias_0_has_or_is_using_private_name_1_4081", message: "Exported type alias '{0}' has or is using private name '{1}'." },
+        Default_export_of_the_module_has_or_is_using_private_name_0: { code: 4082, category: ts.DiagnosticCategory.Error, key: "Default_export_of_the_module_has_or_is_using_private_name_0_4082", message: "Default export of the module has or is using private name '{0}'." },
+        Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict: { code: 4090, category: ts.DiagnosticCategory.Message, key: "Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_t_4090", message: "Conflicting library definitions for '{0}' found at '{1}' and '{2}'. Copy the correct file to the 'typings' folder to resolve this conflict." },
+        The_current_host_does_not_support_the_0_option: { code: 5001, category: ts.DiagnosticCategory.Error, key: "The_current_host_does_not_support_the_0_option_5001", message: "The current host does not support the '{0}' option." },
+        Cannot_find_the_common_subdirectory_path_for_the_input_files: { code: 5009, category: ts.DiagnosticCategory.Error, key: "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", message: "Cannot find the common subdirectory path for the input files." },
+        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}" },
+        Unsupported_file_encoding: { code: 5013, category: ts.DiagnosticCategory.Error, key: "Unsupported_file_encoding_5013", message: "Unsupported file encoding." },
+        Failed_to_parse_file_0_Colon_1: { code: 5014, category: ts.DiagnosticCategory.Error, key: "Failed_to_parse_file_0_Colon_1_5014", message: "Failed to parse file '{0}': {1}." },
+        Unknown_compiler_option_0: { code: 5023, category: ts.DiagnosticCategory.Error, key: "Unknown_compiler_option_0_5023", message: "Unknown compiler option '{0}'." },
+        Compiler_option_0_requires_a_value_of_type_1: { code: 5024, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_requires_a_value_of_type_1_5024", message: "Compiler option '{0}' requires a value of type {1}." },
+        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}" },
+        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: { code: 5042, category: ts.DiagnosticCategory.Error, key: "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", message: "Option 'project' cannot be mixed with source files on a command line." },
+        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: { code: 5047, category: ts.DiagnosticCategory.Error, key: "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", message: "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher." },
+        Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: { code: 5051, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided_5051", message: "Option '{0} can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided." },
+        Option_0_cannot_be_specified_without_specifying_option_1: { code: 5052, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_without_specifying_option_1_5052", message: "Option '{0}' cannot be specified without specifying option '{1}'." },
+        Option_0_cannot_be_specified_with_option_1: { code: 5053, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_with_option_1_5053", message: "Option '{0}' cannot be specified with option '{1}'." },
+        A_tsconfig_json_file_is_already_defined_at_Colon_0: { code: 5054, category: ts.DiagnosticCategory.Error, key: "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", message: "A 'tsconfig.json' file is already defined at: '{0}'." },
+        Cannot_write_file_0_because_it_would_overwrite_input_file: { code: 5055, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", message: "Cannot write file '{0}' because it would overwrite input file." },
+        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: { code: 5056, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", message: "Cannot write file '{0}' because it would be overwritten by multiple input files." },
+        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'" },
+        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'" },
+        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: { code: 5059, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", message: "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier." },
+        Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
+        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
+        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
+        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
+        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
+        Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
+        Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
+        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: { code: 6003, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", message: "Specify the location where debugger should locate map files instead of generated locations." },
+        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: { code: 6004, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations_6004", message: "Specify the location where debugger should locate TypeScript files instead of source locations." },
+        Watch_input_files: { code: 6005, category: ts.DiagnosticCategory.Message, key: "Watch_input_files_6005", message: "Watch input files." },
+        Redirect_output_structure_to_the_directory: { code: 6006, category: ts.DiagnosticCategory.Message, key: "Redirect_output_structure_to_the_directory_6006", message: "Redirect output structure to the directory." },
+        Do_not_erase_const_enum_declarations_in_generated_code: { code: 6007, category: ts.DiagnosticCategory.Message, key: "Do_not_erase_const_enum_declarations_in_generated_code_6007", message: "Do not erase const enum declarations in generated code." },
+        Do_not_emit_outputs_if_any_errors_were_reported: { code: 6008, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_if_any_errors_were_reported_6008", message: "Do not emit outputs if any errors were reported." },
+        Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
+        Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
+        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
+        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
+        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
+        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
+        Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
+        Print_the_compiler_s_version: { code: 6019, category: ts.DiagnosticCategory.Message, key: "Print_the_compiler_s_version_6019", message: "Print the compiler's version." },
+        Compile_the_project_in_the_given_directory: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_in_the_given_directory_6020", message: "Compile the project in the given directory." },
+        Syntax_Colon_0: { code: 6023, category: ts.DiagnosticCategory.Message, key: "Syntax_Colon_0_6023", message: "Syntax: {0}" },
+        options: { code: 6024, category: ts.DiagnosticCategory.Message, key: "options_6024", message: "options" },
+        file: { code: 6025, category: ts.DiagnosticCategory.Message, key: "file_6025", message: "file" },
+        Examples_Colon_0: { code: 6026, category: ts.DiagnosticCategory.Message, key: "Examples_Colon_0_6026", message: "Examples: {0}" },
+        Options_Colon: { code: 6027, category: ts.DiagnosticCategory.Message, key: "Options_Colon_6027", message: "Options:" },
+        Version_0: { code: 6029, category: ts.DiagnosticCategory.Message, key: "Version_0_6029", message: "Version {0}" },
+        Insert_command_line_options_and_files_from_a_file: { code: 6030, category: ts.DiagnosticCategory.Message, key: "Insert_command_line_options_and_files_from_a_file_6030", message: "Insert command line options and files from a file." },
+        File_change_detected_Starting_incremental_compilation: { code: 6032, category: ts.DiagnosticCategory.Message, key: "File_change_detected_Starting_incremental_compilation_6032", message: "File change detected. Starting incremental compilation..." },
+        KIND: { code: 6034, category: ts.DiagnosticCategory.Message, key: "KIND_6034", message: "KIND" },
+        FILE: { code: 6035, category: ts.DiagnosticCategory.Message, key: "FILE_6035", message: "FILE" },
+        VERSION: { code: 6036, category: ts.DiagnosticCategory.Message, key: "VERSION_6036", message: "VERSION" },
+        LOCATION: { code: 6037, category: ts.DiagnosticCategory.Message, key: "LOCATION_6037", message: "LOCATION" },
+        DIRECTORY: { code: 6038, category: ts.DiagnosticCategory.Message, key: "DIRECTORY_6038", message: "DIRECTORY" },
+        Compilation_complete_Watching_for_file_changes: { code: 6042, category: ts.DiagnosticCategory.Message, key: "Compilation_complete_Watching_for_file_changes_6042", message: "Compilation complete. Watching for file changes." },
+        Generates_corresponding_map_file: { code: 6043, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_map_file_6043", message: "Generates corresponding '.map' file." },
+        Compiler_option_0_expects_an_argument: { code: 6044, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_expects_an_argument_6044", message: "Compiler option '{0}' expects an argument." },
+        Unterminated_quoted_string_in_response_file_0: { code: 6045, category: ts.DiagnosticCategory.Error, key: "Unterminated_quoted_string_in_response_file_0_6045", message: "Unterminated quoted string in response file '{0}'." },
+        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}" },
+        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: { code: 6048, category: ts.DiagnosticCategory.Error, key: "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", message: "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'." },
+        Unsupported_locale_0: { code: 6049, category: ts.DiagnosticCategory.Error, key: "Unsupported_locale_0_6049", message: "Unsupported locale '{0}'." },
+        Unable_to_open_file_0: { code: 6050, category: ts.DiagnosticCategory.Error, key: "Unable_to_open_file_0_6050", message: "Unable to open file '{0}'." },
+        Corrupted_locale_file_0: { code: 6051, category: ts.DiagnosticCategory.Error, key: "Corrupted_locale_file_0_6051", message: "Corrupted locale file {0}." },
+        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: { code: 6052, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_expressions_and_declarations_with_an_implied_any_type_6052", message: "Raise error on expressions and declarations with an implied 'any' type." },
+        File_0_not_found: { code: 6053, category: ts.DiagnosticCategory.Error, key: "File_0_not_found_6053", message: "File '{0}' not found." },
+        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: { code: 6054, category: ts.DiagnosticCategory.Error, key: "File_0_has_unsupported_extension_The_only_supported_extensions_are_1_6054", message: "File '{0}' has unsupported extension. The only supported extensions are {1}." },
+        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: { code: 6055, category: ts.DiagnosticCategory.Message, key: "Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures_6055", message: "Suppress noImplicitAny errors for indexing objects lacking index signatures." },
+        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: { code: 6056, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_declarations_for_code_that_has_an_internal_annotation_6056", message: "Do not emit declarations for code that has an '@internal' annotation." },
+        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: { code: 6058, category: ts.DiagnosticCategory.Message, key: "Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir_6058", message: "Specify the root directory of input files. Use to control the output directory structure with --outDir." },
+        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: { code: 6059, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files_6059", message: "File '{0}' is not under 'rootDir' '{1}'. 'rootDir' is expected to contain all source files." },
+        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: { code: 6060, category: ts.DiagnosticCategory.Message, key: "Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix_6060", message: "Specify the end of line sequence to be used when emitting files: 'CRLF' (dos) or 'LF' (unix)." },
+        NEWLINE: { code: 6061, category: ts.DiagnosticCategory.Message, key: "NEWLINE_6061", message: "NEWLINE" },
+        Option_0_can_only_be_specified_in_tsconfig_json_file: { code: 6064, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_specified_in_tsconfig_json_file_6064", message: "Option '{0}' can only be specified in 'tsconfig.json' file." },
+        Enables_experimental_support_for_ES7_decorators: { code: 6065, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_decorators_6065", message: "Enables experimental support for ES7 decorators." },
+        Enables_experimental_support_for_emitting_type_metadata_for_decorators: { code: 6066, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_emitting_type_metadata_for_decorators_6066", message: "Enables experimental support for emitting type metadata for decorators." },
+        Enables_experimental_support_for_ES7_async_functions: { code: 6068, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_async_functions_6068", message: "Enables experimental support for ES7 async functions." },
+        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: { code: 6069, category: ts.DiagnosticCategory.Message, key: "Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6_6069", message: "Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6)." },
+        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: { code: 6070, category: ts.DiagnosticCategory.Message, key: "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", message: "Initializes a TypeScript project and creates a tsconfig.json file." },
+        Successfully_created_a_tsconfig_json_file: { code: 6071, category: ts.DiagnosticCategory.Message, key: "Successfully_created_a_tsconfig_json_file_6071", message: "Successfully created a tsconfig.json file." },
+        Suppress_excess_property_checks_for_object_literals: { code: 6072, category: ts.DiagnosticCategory.Message, key: "Suppress_excess_property_checks_for_object_literals_6072", message: "Suppress excess property checks for object literals." },
+        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context. (experimental)" },
+        Do_not_report_errors_on_unused_labels: { code: 6074, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unused_labels_6074", message: "Do not report errors on unused labels." },
+        Report_error_when_not_all_code_paths_in_function_return_a_value: { code: 6075, category: ts.DiagnosticCategory.Message, key: "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", message: "Report error when not all code paths in function return a value." },
+        Report_errors_for_fallthrough_cases_in_switch_statement: { code: 6076, category: ts.DiagnosticCategory.Message, key: "Report_errors_for_fallthrough_cases_in_switch_statement_6076", message: "Report errors for fallthrough cases in switch statement." },
+        Do_not_report_errors_on_unreachable_code: { code: 6077, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unreachable_code_6077", message: "Do not report errors on unreachable code." },
+        Disallow_inconsistently_cased_references_to_the_same_file: { code: 6078, category: ts.DiagnosticCategory.Message, key: "Disallow_inconsistently_cased_references_to_the_same_file_6078", message: "Disallow inconsistently-cased references to the same file." },
+        Specify_library_files_to_be_included_in_the_compilation_Colon: { code: 6079, category: ts.DiagnosticCategory.Message, key: "Specify_library_files_to_be_included_in_the_compilation_Colon_6079", message: "Specify library files to be included in the compilation: " },
+        Specify_JSX_code_generation_Colon_preserve_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_or_react_6080", message: "Specify JSX code generation: 'preserve' or 'react'" },
+        Only_amd_and_system_modules_are_supported_alongside_0: { code: 6082, category: ts.DiagnosticCategory.Error, key: "Only_amd_and_system_modules_are_supported_alongside_0_6082", message: "Only 'amd' and 'system' modules are supported alongside --{0}." },
+        Base_directory_to_resolve_non_absolute_module_names: { code: 6083, category: ts.DiagnosticCategory.Message, key: "Base_directory_to_resolve_non_absolute_module_names_6083", message: "Base directory to resolve non-absolute module names." },
+        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084", message: "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit" },
+        Enable_tracing_of_the_name_resolution_process: { code: 6085, category: ts.DiagnosticCategory.Message, key: "Enable_tracing_of_the_name_resolution_process_6085", message: "Enable tracing of the name resolution process." },
+        Resolving_module_0_from_1: { code: 6086, category: ts.DiagnosticCategory.Message, key: "Resolving_module_0_from_1_6086", message: "======== Resolving module '{0}' from '{1}'. ========" },
+        Explicitly_specified_module_resolution_kind_Colon_0: { code: 6087, category: ts.DiagnosticCategory.Message, key: "Explicitly_specified_module_resolution_kind_Colon_0_6087", message: "Explicitly specified module resolution kind: '{0}'." },
+        Module_resolution_kind_is_not_specified_using_0: { code: 6088, category: ts.DiagnosticCategory.Message, key: "Module_resolution_kind_is_not_specified_using_0_6088", message: "Module resolution kind is not specified, using '{0}'." },
+        Module_name_0_was_successfully_resolved_to_1: { code: 6089, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_successfully_resolved_to_1_6089", message: "======== Module name '{0}' was successfully resolved to '{1}'. ========" },
+        Module_name_0_was_not_resolved: { code: 6090, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_not_resolved_6090", message: "======== Module name '{0}' was not resolved. ========" },
+        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: { code: 6091, category: ts.DiagnosticCategory.Message, key: "paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0_6091", message: "'paths' option is specified, looking for a pattern to match module name '{0}'." },
+        Module_name_0_matched_pattern_1: { code: 6092, category: ts.DiagnosticCategory.Message, key: "Module_name_0_matched_pattern_1_6092", message: "Module name '{0}', matched pattern '{1}'." },
+        Trying_substitution_0_candidate_module_location_Colon_1: { code: 6093, category: ts.DiagnosticCategory.Message, key: "Trying_substitution_0_candidate_module_location_Colon_1_6093", message: "Trying substitution '{0}', candidate module location: '{1}'." },
+        Resolving_module_name_0_relative_to_base_url_1_2: { code: 6094, category: ts.DiagnosticCategory.Message, key: "Resolving_module_name_0_relative_to_base_url_1_2_6094", message: "Resolving module name '{0}' relative to base url '{1}' - '{2}'." },
+        Loading_module_as_file_Slash_folder_candidate_module_location_0: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095", message: "Loading module as file / folder, candidate module location '{0}'." },
+        File_0_does_not_exist: { code: 6096, category: ts.DiagnosticCategory.Message, key: "File_0_does_not_exist_6096", message: "File '{0}' does not exist." },
+        File_0_exist_use_it_as_a_name_resolution_result: { code: 6097, category: ts.DiagnosticCategory.Message, key: "File_0_exist_use_it_as_a_name_resolution_result_6097", message: "File '{0}' exist - use it as a name resolution result." },
+        Loading_module_0_from_node_modules_folder: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_6098", message: "Loading module '{0}' from 'node_modules' folder." },
+        Found_package_json_at_0: { code: 6099, category: ts.DiagnosticCategory.Message, key: "Found_package_json_at_0_6099", message: "Found 'package.json' at '{0}'." },
+        package_json_does_not_have_types_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_types_field_6100", message: "'package.json' does not have 'types' field." },
+        package_json_has_0_field_1_that_references_2: { code: 6101, category: ts.DiagnosticCategory.Message, key: "package_json_has_0_field_1_that_references_2_6101", message: "'package.json' has '{0}' field '{1}' that references '{2}'." },
+        Allow_javascript_files_to_be_compiled: { code: 6102, category: ts.DiagnosticCategory.Message, key: "Allow_javascript_files_to_be_compiled_6102", message: "Allow javascript files to be compiled." },
+        Option_0_should_have_array_of_strings_as_a_value: { code: 6103, category: ts.DiagnosticCategory.Error, key: "Option_0_should_have_array_of_strings_as_a_value_6103", message: "Option '{0}' should have array of strings as a value." },
+        Checking_if_0_is_the_longest_matching_prefix_for_1_2: { code: 6104, category: ts.DiagnosticCategory.Message, key: "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", message: "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'." },
+        Expected_type_of_0_field_in_package_json_to_be_string_got_1: { code: 6105, category: ts.DiagnosticCategory.Message, key: "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", message: "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'." },
+        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'" },
+        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'" },
+        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'" },
+        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'" },
+        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'" },
+        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed" },
+        Do_not_emit_use_strict_directives_in_module_output: { code: 6112, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_use_strict_directives_in_module_output_6112", message: "Do not emit 'use strict' directives in module output." },
+        Enable_strict_null_checks: { code: 6113, category: ts.DiagnosticCategory.Message, key: "Enable_strict_null_checks_6113", message: "Enable strict null checks." },
+        Unknown_option_excludes_Did_you_mean_exclude: { code: 6114, category: ts.DiagnosticCategory.Error, key: "Unknown_option_excludes_Did_you_mean_exclude_6114", message: "Unknown option 'excludes'. Did you mean 'exclude'?" },
+        Raise_error_on_this_expressions_with_an_implied_any_type: { code: 6115, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_this_expressions_with_an_implied_any_type_6115", message: "Raise error on 'this' expressions with an implied 'any' type." },
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: { code: 6116, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_2_6116", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory '{2}'. ========" },
+        Resolving_using_primary_search_paths: { code: 6117, category: ts.DiagnosticCategory.Message, key: "Resolving_using_primary_search_paths_6117", message: "Resolving using primary search paths..." },
+        Resolving_from_node_modules_folder: { code: 6118, category: ts.DiagnosticCategory.Message, key: "Resolving_from_node_modules_folder_6118", message: "Resolving from node_modules folder..." },
+        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: { code: 6119, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", message: "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========" },
+        Type_reference_directive_0_was_not_resolved: { code: 6120, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_not_resolved_6120", message: "======== Type reference directive '{0}' was not resolved. ========" },
+        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'" },
+        Root_directory_cannot_be_determined_skipping_primary_search_paths: { code: 6122, category: ts.DiagnosticCategory.Message, key: "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", message: "Root directory cannot be determined, skipping primary search paths." },
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: { code: 6123, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========" },
+        Type_declaration_files_to_be_included_in_compilation: { code: 6124, category: ts.DiagnosticCategory.Message, key: "Type_declaration_files_to_be_included_in_compilation_6124", message: "Type declaration files to be included in compilation." },
+        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'" },
+        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: { code: 6126, category: ts.DiagnosticCategory.Message, key: "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", message: "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder." },
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: { code: 6127, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", message: "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========" },
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
+        The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
+        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
+        File_name_0_has_a_1_extension_stripping_it: { code: 6132, category: ts.DiagnosticCategory.Message, key: "File_name_0_has_a_1_extension_stripping_it_6132", message: "File name '{0}' has a '{1}' extension - stripping it" },
+        Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
+        Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
+        Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
+        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: { code: 7009, category: ts.DiagnosticCategory.Error, key: "new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type_7009", message: "'new' expression, whose target lacks a construct signature, implicitly has an 'any' type." },
+        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: { code: 7010, category: ts.DiagnosticCategory.Error, key: "_0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type_7010", message: "'{0}', which lacks return-type annotation, implicitly has an '{1}' return type." },
+        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: { code: 7011, category: ts.DiagnosticCategory.Error, key: "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", message: "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type." },
+        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7013, category: ts.DiagnosticCategory.Error, key: "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", message: "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type." },
+        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: { code: 7015, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", message: "Element implicitly has an 'any' type because index expression is not of type 'number'." },
+        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation: { code: 7016, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation_7016", message: "Property '{0}' implicitly has type 'any', because its 'set' accessor lacks a type annotation." },
+        Index_signature_of_object_type_implicitly_has_an_any_type: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Index_signature_of_object_type_implicitly_has_an_any_type_7017", message: "Index signature of object type implicitly has an 'any' type." },
+        Object_literal_s_property_0_implicitly_has_an_1_type: { code: 7018, category: ts.DiagnosticCategory.Error, key: "Object_literal_s_property_0_implicitly_has_an_1_type_7018", message: "Object literal's property '{0}' implicitly has an '{1}' type." },
+        Rest_parameter_0_implicitly_has_an_any_type: { code: 7019, category: ts.DiagnosticCategory.Error, key: "Rest_parameter_0_implicitly_has_an_any_type_7019", message: "Rest parameter '{0}' implicitly has an 'any[]' type." },
+        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7020, category: ts.DiagnosticCategory.Error, key: "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", message: "Call signature, which lacks return-type annotation, implicitly has an 'any' return type." },
+        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: { code: 7022, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or__7022", message: "'{0}' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer." },
+        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7023, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", message: "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
+        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7024, category: ts.DiagnosticCategory.Error, key: "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", message: "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
+        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: { code: 7025, category: ts.DiagnosticCategory.Error, key: "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", message: "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type." },
+        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists" },
+        Unreachable_code_detected: { code: 7027, category: ts.DiagnosticCategory.Error, key: "Unreachable_code_detected_7027", message: "Unreachable code detected." },
+        Unused_label: { code: 7028, category: ts.DiagnosticCategory.Error, key: "Unused_label_7028", message: "Unused label." },
+        Fallthrough_case_in_switch: { code: 7029, category: ts.DiagnosticCategory.Error, key: "Fallthrough_case_in_switch_7029", message: "Fallthrough case in switch." },
+        Not_all_code_paths_return_a_value: { code: 7030, category: ts.DiagnosticCategory.Error, key: "Not_all_code_paths_return_a_value_7030", message: "Not all code paths return a value." },
+        Binding_element_0_implicitly_has_an_1_type: { code: 7031, category: ts.DiagnosticCategory.Error, key: "Binding_element_0_implicitly_has_an_1_type_7031", message: "Binding element '{0}' implicitly has an '{1}' type." },
+        You_cannot_rename_this_element: { code: 8000, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_this_element_8000", message: "You cannot rename this element." },
+        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: { code: 8001, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", message: "You cannot rename elements that are defined in the standard TypeScript library." },
+        import_can_only_be_used_in_a_ts_file: { code: 8002, category: ts.DiagnosticCategory.Error, key: "import_can_only_be_used_in_a_ts_file_8002", message: "'import ... =' can only be used in a .ts file." },
+        export_can_only_be_used_in_a_ts_file: { code: 8003, category: ts.DiagnosticCategory.Error, key: "export_can_only_be_used_in_a_ts_file_8003", message: "'export=' can only be used in a .ts file." },
+        type_parameter_declarations_can_only_be_used_in_a_ts_file: { code: 8004, category: ts.DiagnosticCategory.Error, key: "type_parameter_declarations_can_only_be_used_in_a_ts_file_8004", message: "'type parameter declarations' can only be used in a .ts file." },
+        implements_clauses_can_only_be_used_in_a_ts_file: { code: 8005, category: ts.DiagnosticCategory.Error, key: "implements_clauses_can_only_be_used_in_a_ts_file_8005", message: "'implements clauses' can only be used in a .ts file." },
+        interface_declarations_can_only_be_used_in_a_ts_file: { code: 8006, category: ts.DiagnosticCategory.Error, key: "interface_declarations_can_only_be_used_in_a_ts_file_8006", message: "'interface declarations' can only be used in a .ts file." },
+        module_declarations_can_only_be_used_in_a_ts_file: { code: 8007, category: ts.DiagnosticCategory.Error, key: "module_declarations_can_only_be_used_in_a_ts_file_8007", message: "'module declarations' can only be used in a .ts file." },
+        type_aliases_can_only_be_used_in_a_ts_file: { code: 8008, category: ts.DiagnosticCategory.Error, key: "type_aliases_can_only_be_used_in_a_ts_file_8008", message: "'type aliases' can only be used in a .ts file." },
+        _0_can_only_be_used_in_a_ts_file: { code: 8009, category: ts.DiagnosticCategory.Error, key: "_0_can_only_be_used_in_a_ts_file_8009", message: "'{0}' can only be used in a .ts file." },
+        types_can_only_be_used_in_a_ts_file: { code: 8010, category: ts.DiagnosticCategory.Error, key: "types_can_only_be_used_in_a_ts_file_8010", message: "'types' can only be used in a .ts file." },
+        type_arguments_can_only_be_used_in_a_ts_file: { code: 8011, category: ts.DiagnosticCategory.Error, key: "type_arguments_can_only_be_used_in_a_ts_file_8011", message: "'type arguments' can only be used in a .ts file." },
+        parameter_modifiers_can_only_be_used_in_a_ts_file: { code: 8012, category: ts.DiagnosticCategory.Error, key: "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", message: "'parameter modifiers' can only be used in a .ts file." },
+        property_declarations_can_only_be_used_in_a_ts_file: { code: 8014, category: ts.DiagnosticCategory.Error, key: "property_declarations_can_only_be_used_in_a_ts_file_8014", message: "'property declarations' can only be used in a .ts file." },
+        enum_declarations_can_only_be_used_in_a_ts_file: { code: 8015, category: ts.DiagnosticCategory.Error, key: "enum_declarations_can_only_be_used_in_a_ts_file_8015", message: "'enum declarations' can only be used in a .ts file." },
+        type_assertion_expressions_can_only_be_used_in_a_ts_file: { code: 8016, category: ts.DiagnosticCategory.Error, key: "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", message: "'type assertion expressions' can only be used in a .ts file." },
+        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses." },
+        class_expressions_are_not_currently_supported: { code: 9003, category: ts.DiagnosticCategory.Error, key: "class_expressions_are_not_currently_supported_9003", message: "'class' expressions are not currently supported." },
+        JSX_attributes_must_only_be_assigned_a_non_empty_expression: { code: 17000, category: ts.DiagnosticCategory.Error, key: "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", message: "JSX attributes must only be assigned a non-empty 'expression'." },
+        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: { code: 17001, category: ts.DiagnosticCategory.Error, key: "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", message: "JSX elements cannot have multiple attributes with the same name." },
+        Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: ts.DiagnosticCategory.Error, key: "Expected_corresponding_JSX_closing_tag_for_0_17002", message: "Expected corresponding JSX closing tag for '{0}'." },
+        JSX_attribute_expected: { code: 17003, category: ts.DiagnosticCategory.Error, key: "JSX_attribute_expected_17003", message: "JSX attribute expected." },
+        Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: ts.DiagnosticCategory.Error, key: "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", message: "Cannot use JSX unless the '--jsx' flag is provided." },
+        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'" },
+        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17006, category: ts.DiagnosticCategory.Error, key: "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", message: "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
+        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17007, category: ts.DiagnosticCategory.Error, key: "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", message: "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
+        JSX_element_0_has_no_corresponding_closing_tag: { code: 17008, category: ts.DiagnosticCategory.Error, key: "JSX_element_0_has_no_corresponding_closing_tag_17008", message: "JSX element '{0}' has no corresponding closing tag." },
+        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: { code: 17009, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", message: "'super' must be called before accessing 'this' in the constructor of a derived class." },
+        Unknown_typing_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_typing_option_0_17010", message: "Unknown typing option '{0}'." }
+    };
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function tokenIsIdentifierOrKeyword(token) {
+        return token >= 69;
+    }
+    ts.tokenIsIdentifierOrKeyword = tokenIsIdentifierOrKeyword;
+    var textToToken = {
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+        "default": 77,
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+        "false": 84,
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+        "function": 87,
+        "get": 123,
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+        "implements": 106,
+        "import": 89,
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+        "interface": 107,
+        "is": 124,
+        "let": 108,
+        "module": 125,
+        "namespace": 126,
+        "never": 127,
+        "new": 92,
+        "null": 93,
+        "number": 130,
+        "package": 109,
+        "private": 110,
+        "protected": 111,
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+        "readonly": 128,
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+        "global": 137,
+        "return": 94,
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+        "static": 113,
+        "string": 132,
+        "super": 95,
+        "switch": 96,
+        "symbol": 133,
+        "this": 97,
+        "throw": 98,
+        "true": 99,
+        "try": 100,
+        "type": 134,
+        "typeof": 101,
+        "undefined": 135,
+        "var": 102,
+        "void": 103,
+        "while": 104,
+        "with": 105,
+        "yield": 114,
+        "async": 118,
+        "await": 119,
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+        "{": 15,
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+        "%": 40,
+        "++": 41,
+        "--": 42,
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+        "</": 26,
+        ">>": 44,
+        ">>>": 45,
+        "&": 46,
+        "|": 47,
+        "^": 48,
+        "!": 49,
+        "~": 50,
+        "&&": 51,
+        "||": 52,
+        "?": 53,
+        ":": 54,
+        "=": 56,
+        "+=": 57,
+        "-=": 58,
+        "*=": 59,
+        "**=": 60,
+        "/=": 61,
+        "%=": 62,
+        "<<=": 63,
+        ">>=": 64,
+        ">>>=": 65,
+        "&=": 66,
+        "|=": 67,
+        "^=": 68,
+        "@": 55
+    };
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11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    function lookupInUnicodeMap(code, map) {
+        if (code < map[0]) {
+            return false;
+        }
+        var lo = 0;
+        var hi = map.length;
+        var mid;
+        while (lo + 1 < hi) {
+            mid = lo + (hi - lo) / 2;
+            mid -= mid % 2;
+            if (map[mid] <= code && code <= map[mid + 1]) {
+                return true;
+            }
+            if (code < map[mid]) {
+                hi = mid;
+            }
+            else {
+                lo = mid + 2;
+            }
+        }
+        return false;
+    }
+    function isUnicodeIdentifierStart(code, languageVersion) {
+        return languageVersion >= 1 ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
+    }
+    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
+    function isUnicodeIdentifierPart(code, languageVersion) {
+        return languageVersion >= 1 ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
+    }
+    function makeReverseMap(source) {
+        var result = [];
+        for (var name_4 in source) {
+            if (source.hasOwnProperty(name_4)) {
+                result[source[name_4]] = name_4;
+            }
+        }
+        return result;
+    }
+    var tokenStrings = makeReverseMap(textToToken);
+    function tokenToString(t) {
+        return tokenStrings[t];
+    }
+    ts.tokenToString = tokenToString;
+    function stringToToken(s) {
+        return textToToken[s];
+    }
+    ts.stringToToken = stringToToken;
+    function computeLineStarts(text) {
+        var result = new Array();
+        var pos = 0;
+        var lineStart = 0;
+        while (pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 13:
+                    if (text.charCodeAt(pos) === 10) {
+                        pos++;
+                    }
+                case 10:
+                    result.push(lineStart);
+                    lineStart = pos;
+                    break;
+                default:
+                    if (ch > 127 && isLineBreak(ch)) {
+                        result.push(lineStart);
+                        lineStart = pos;
+                    }
+                    break;
+            }
+        }
+        result.push(lineStart);
+        return result;
+    }
+    ts.computeLineStarts = computeLineStarts;
+    function getPositionOfLineAndCharacter(sourceFile, line, character) {
+        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
+    }
+    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
+    function computePositionOfLineAndCharacter(lineStarts, line, character) {
+        ts.Debug.assert(line >= 0 && line < lineStarts.length);
+        return lineStarts[line] + character;
+    }
+    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
+    function getLineStarts(sourceFile) {
+        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
+    }
+    ts.getLineStarts = getLineStarts;
+    function computeLineAndCharacterOfPosition(lineStarts, position) {
+        var lineNumber = ts.binarySearch(lineStarts, position);
+        if (lineNumber < 0) {
+            lineNumber = ~lineNumber - 1;
+            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
+        }
+        return {
+            line: lineNumber,
+            character: position - lineStarts[lineNumber]
+        };
+    }
+    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
+    function getLineAndCharacterOfPosition(sourceFile, position) {
+        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
+    }
+    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
+    var hasOwnProperty = Object.prototype.hasOwnProperty;
+    function isWhiteSpace(ch) {
+        return ch === 32 ||
+            ch === 9 ||
+            ch === 11 ||
+            ch === 12 ||
+            ch === 160 ||
+            ch === 133 ||
+            ch === 5760 ||
+            ch >= 8192 && ch <= 8203 ||
+            ch === 8239 ||
+            ch === 8287 ||
+            ch === 12288 ||
+            ch === 65279;
+    }
+    ts.isWhiteSpace = isWhiteSpace;
+    function isLineBreak(ch) {
+        return ch === 10 ||
+            ch === 13 ||
+            ch === 8232 ||
+            ch === 8233;
+    }
+    ts.isLineBreak = isLineBreak;
+    function isDigit(ch) {
+        return ch >= 48 && ch <= 57;
+    }
+    function isOctalDigit(ch) {
+        return ch >= 48 && ch <= 55;
+    }
+    ts.isOctalDigit = isOctalDigit;
+    function couldStartTrivia(text, pos) {
+        var ch = text.charCodeAt(pos);
+        switch (ch) {
+            case 13:
+            case 10:
+            case 9:
+            case 11:
+            case 12:
+            case 32:
+            case 47:
+            case 60:
+            case 61:
+            case 62:
+                return true;
+            case 35:
+                return pos === 0;
+            default:
+                return ch > 127;
+        }
+    }
+    ts.couldStartTrivia = couldStartTrivia;
+    function skipTrivia(text, pos, stopAfterLineBreak, stopAtComments) {
+        if (stopAtComments === void 0) { stopAtComments = false; }
+        if (!(pos >= 0)) {
+            return pos;
+        }
+        while (true) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13:
+                    if (text.charCodeAt(pos + 1) === 10) {
+                        pos++;
+                    }
+                case 10:
+                    pos++;
+                    if (stopAfterLineBreak) {
+                        return pos;
+                    }
+                    continue;
+                case 9:
+                case 11:
+                case 12:
+                case 32:
+                    pos++;
+                    continue;
+                case 47:
+                    if (stopAtComments) {
+                        break;
+                    }
+                    if (text.charCodeAt(pos + 1) === 47) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (isLineBreak(text.charCodeAt(pos))) {
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    if (text.charCodeAt(pos + 1) === 42) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
+                                pos += 2;
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    break;
+                case 60:
+                case 61:
+                case 62:
+                    if (isConflictMarkerTrivia(text, pos)) {
+                        pos = scanConflictMarkerTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                case 35:
+                    if (pos === 0 && isShebangTrivia(text, pos)) {
+                        pos = scanShebangTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                default:
+                    if (ch > 127 && (isWhiteSpace(ch) || isLineBreak(ch))) {
+                        pos++;
+                        continue;
+                    }
+                    break;
+            }
+            return pos;
+        }
+    }
+    ts.skipTrivia = skipTrivia;
+    var mergeConflictMarkerLength = "<<<<<<<".length;
+    function isConflictMarkerTrivia(text, pos) {
+        ts.Debug.assert(pos >= 0);
+        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
+            var ch = text.charCodeAt(pos);
+            if ((pos + mergeConflictMarkerLength) < text.length) {
+                for (var i = 0, n = mergeConflictMarkerLength; i < n; i++) {
+                    if (text.charCodeAt(pos + i) !== ch) {
+                        return false;
+                    }
+                }
+                return ch === 61 ||
+                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32;
+            }
+        }
+        return false;
+    }
+    function scanConflictMarkerTrivia(text, pos, error) {
+        if (error) {
+            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
+        }
+        var ch = text.charCodeAt(pos);
+        var len = text.length;
+        if (ch === 60 || ch === 62) {
+            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
+                pos++;
+            }
+        }
+        else {
+            ts.Debug.assert(ch === 61);
+            while (pos < len) {
+                var ch_1 = text.charCodeAt(pos);
+                if (ch_1 === 62 && isConflictMarkerTrivia(text, pos)) {
+                    break;
+                }
+                pos++;
+            }
+        }
+        return pos;
+    }
+    var shebangTriviaRegex = /^#!.*/;
+    function isShebangTrivia(text, pos) {
+        ts.Debug.assert(pos === 0);
+        return shebangTriviaRegex.test(text);
+    }
+    function scanShebangTrivia(text, pos) {
+        var shebang = shebangTriviaRegex.exec(text)[0];
+        pos = pos + shebang.length;
+        return pos;
+    }
+    function getCommentRanges(text, pos, trailing) {
+        var result;
+        var collecting = trailing || pos === 0;
+        while (pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13:
+                    if (text.charCodeAt(pos + 1) === 10) {
+                        pos++;
+                    }
+                case 10:
+                    pos++;
+                    if (trailing) {
+                        return result;
+                    }
+                    collecting = true;
+                    if (result && result.length) {
+                        ts.lastOrUndefined(result).hasTrailingNewLine = true;
+                    }
+                    continue;
+                case 9:
+                case 11:
+                case 12:
+                case 32:
+                    pos++;
+                    continue;
+                case 47:
+                    var nextChar = text.charCodeAt(pos + 1);
+                    var hasTrailingNewLine = false;
+                    if (nextChar === 47 || nextChar === 42) {
+                        var kind = nextChar === 47 ? 2 : 3;
+                        var startPos = pos;
+                        pos += 2;
+                        if (nextChar === 47) {
+                            while (pos < text.length) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    hasTrailingNewLine = true;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        else {
+                            while (pos < text.length) {
+                                if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
+                                    pos += 2;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        if (collecting) {
+                            if (!result) {
+                                result = [];
+                            }
+                            result.push({ pos: startPos, end: pos, hasTrailingNewLine: hasTrailingNewLine, kind: kind });
+                        }
+                        continue;
+                    }
+                    break;
+                default:
+                    if (ch > 127 && (isWhiteSpace(ch) || isLineBreak(ch))) {
+                        if (result && result.length && isLineBreak(ch)) {
+                            ts.lastOrUndefined(result).hasTrailingNewLine = true;
+                        }
+                        pos++;
+                        continue;
+                    }
+                    break;
+            }
+            return result;
+        }
+        return result;
+    }
+    function getLeadingCommentRanges(text, pos) {
+        return getCommentRanges(text, pos, false);
+    }
+    ts.getLeadingCommentRanges = getLeadingCommentRanges;
+    function getTrailingCommentRanges(text, pos) {
+        return getCommentRanges(text, pos, true);
+    }
+    ts.getTrailingCommentRanges = getTrailingCommentRanges;
+    function getShebang(text) {
+        return shebangTriviaRegex.test(text)
+            ? shebangTriviaRegex.exec(text)[0]
+            : undefined;
+    }
+    ts.getShebang = getShebang;
+    function isIdentifierStart(ch, languageVersion) {
+        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
+            ch === 36 || ch === 95 ||
+            ch > 127 && isUnicodeIdentifierStart(ch, languageVersion);
+    }
+    ts.isIdentifierStart = isIdentifierStart;
+    function isIdentifierPart(ch, languageVersion) {
+        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
+            ch >= 48 && ch <= 57 || ch === 36 || ch === 95 ||
+            ch > 127 && isUnicodeIdentifierPart(ch, languageVersion);
+    }
+    ts.isIdentifierPart = isIdentifierPart;
+    function isIdentifier(name, languageVersion) {
+        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
+            return false;
+        }
+        for (var i = 1, n = name.length; i < n; i++) {
+            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.isIdentifier = isIdentifier;
+    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
+        if (languageVariant === void 0) { languageVariant = 0; }
+        var pos;
+        var end;
+        var startPos;
+        var tokenPos;
+        var token;
+        var tokenValue;
+        var precedingLineBreak;
+        var hasExtendedUnicodeEscape;
+        var tokenIsUnterminated;
+        setText(text, start, length);
+        return {
+            getStartPos: function () { return startPos; },
+            getTextPos: function () { return pos; },
+            getToken: function () { return token; },
+            getTokenPos: function () { return tokenPos; },
+            getTokenText: function () { return text.substring(tokenPos, pos); },
+            getTokenValue: function () { return tokenValue; },
+            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
+            hasPrecedingLineBreak: function () { return precedingLineBreak; },
+            isIdentifier: function () { return token === 69 || token > 105; },
+            isReservedWord: function () { return token >= 70 && token <= 105; },
+            isUnterminated: function () { return tokenIsUnterminated; },
+            reScanGreaterToken: reScanGreaterToken,
+            reScanSlashToken: reScanSlashToken,
+            reScanTemplateToken: reScanTemplateToken,
+            scanJsxIdentifier: scanJsxIdentifier,
+            reScanJsxToken: reScanJsxToken,
+            scanJsxToken: scanJsxToken,
+            scanJSDocToken: scanJSDocToken,
+            scan: scan,
+            setText: setText,
+            setScriptTarget: setScriptTarget,
+            setLanguageVariant: setLanguageVariant,
+            setOnError: setOnError,
+            setTextPos: setTextPos,
+            tryScan: tryScan,
+            lookAhead: lookAhead,
+            scanRange: scanRange
+        };
+        function error(message, length) {
+            if (onError) {
+                onError(message, length || 0);
+            }
+        }
+        function scanNumber() {
+            var start = pos;
+            while (isDigit(text.charCodeAt(pos)))
+                pos++;
+            if (text.charCodeAt(pos) === 46) {
+                pos++;
+                while (isDigit(text.charCodeAt(pos)))
+                    pos++;
+            }
+            var end = pos;
+            if (text.charCodeAt(pos) === 69 || text.charCodeAt(pos) === 101) {
+                pos++;
+                if (text.charCodeAt(pos) === 43 || text.charCodeAt(pos) === 45)
+                    pos++;
+                if (isDigit(text.charCodeAt(pos))) {
+                    pos++;
+                    while (isDigit(text.charCodeAt(pos)))
+                        pos++;
+                    end = pos;
+                }
+                else {
+                    error(ts.Diagnostics.Digit_expected);
+                }
+            }
+            return "" + +(text.substring(start, end));
+        }
+        function scanOctalDigits() {
+            var start = pos;
+            while (isOctalDigit(text.charCodeAt(pos))) {
+                pos++;
+            }
+            return +(text.substring(start, pos));
+        }
+        function scanExactNumberOfHexDigits(count) {
+            return scanHexDigits(count, false);
+        }
+        function scanMinimumNumberOfHexDigits(count) {
+            return scanHexDigits(count, true);
+        }
+        function scanHexDigits(minCount, scanAsManyAsPossible) {
+            var digits = 0;
+            var value = 0;
+            while (digits < minCount || scanAsManyAsPossible) {
+                var ch = text.charCodeAt(pos);
+                if (ch >= 48 && ch <= 57) {
+                    value = value * 16 + ch - 48;
+                }
+                else if (ch >= 65 && ch <= 70) {
+                    value = value * 16 + ch - 65 + 10;
+                }
+                else if (ch >= 97 && ch <= 102) {
+                    value = value * 16 + ch - 97 + 10;
+                }
+                else {
+                    break;
+                }
+                pos++;
+                digits++;
+            }
+            if (digits < minCount) {
+                value = -1;
+            }
+            return value;
+        }
+        function scanString() {
+            var quote = text.charCodeAt(pos);
+            pos++;
+            var result = "";
+            var start = pos;
+            while (true) {
+                if (pos >= end) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                var ch = text.charCodeAt(pos);
+                if (ch === quote) {
+                    result += text.substring(start, pos);
+                    pos++;
+                    break;
+                }
+                if (ch === 92) {
+                    result += text.substring(start, pos);
+                    result += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                if (isLineBreak(ch)) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                pos++;
+            }
+            return result;
+        }
+        function scanTemplateAndSetTokenValue() {
+            var startedWithBacktick = text.charCodeAt(pos) === 96;
+            pos++;
+            var start = pos;
+            var contents = "";
+            var resultingToken;
+            while (true) {
+                if (pos >= end) {
+                    contents += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_template_literal);
+                    resultingToken = startedWithBacktick ? 11 : 14;
+                    break;
+                }
+                var currChar = text.charCodeAt(pos);
+                if (currChar === 96) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    resultingToken = startedWithBacktick ? 11 : 14;
+                    break;
+                }
+                if (currChar === 36 && pos + 1 < end && text.charCodeAt(pos + 1) === 123) {
+                    contents += text.substring(start, pos);
+                    pos += 2;
+                    resultingToken = startedWithBacktick ? 12 : 13;
+                    break;
+                }
+                if (currChar === 92) {
+                    contents += text.substring(start, pos);
+                    contents += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                if (currChar === 13) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    if (pos < end && text.charCodeAt(pos) === 10) {
+                        pos++;
+                    }
+                    contents += "\n";
+                    start = pos;
+                    continue;
+                }
+                pos++;
+            }
+            ts.Debug.assert(resultingToken !== undefined);
+            tokenValue = contents;
+            return resultingToken;
+        }
+        function scanEscapeSequence() {
+            pos++;
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                return "";
+            }
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 48:
+                    return "\0";
+                case 98:
+                    return "\b";
+                case 116:
+                    return "\t";
+                case 110:
+                    return "\n";
+                case 118:
+                    return "\v";
+                case 102:
+                    return "\f";
+                case 114:
+                    return "\r";
+                case 39:
+                    return "\'";
+                case 34:
+                    return "\"";
+                case 117:
+                    if (pos < end && text.charCodeAt(pos) === 123) {
+                        hasExtendedUnicodeEscape = true;
+                        pos++;
+                        return scanExtendedUnicodeEscape();
+                    }
+                    return scanHexadecimalEscape(4);
+                case 120:
+                    return scanHexadecimalEscape(2);
+                case 13:
+                    if (pos < end && text.charCodeAt(pos) === 10) {
+                        pos++;
+                    }
+                case 10:
+                case 8232:
+                case 8233:
+                    return "";
+                default:
+                    return String.fromCharCode(ch);
+            }
+        }
+        function scanHexadecimalEscape(numDigits) {
+            var escapedValue = scanExactNumberOfHexDigits(numDigits);
+            if (escapedValue >= 0) {
+                return String.fromCharCode(escapedValue);
+            }
+            else {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                return "";
+            }
+        }
+        function scanExtendedUnicodeEscape() {
+            var escapedValue = scanMinimumNumberOfHexDigits(1);
+            var isInvalidExtendedEscape = false;
+            if (escapedValue < 0) {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                isInvalidExtendedEscape = true;
+            }
+            else if (escapedValue > 0x10FFFF) {
+                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
+                isInvalidExtendedEscape = true;
+            }
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                isInvalidExtendedEscape = true;
+            }
+            else if (text.charCodeAt(pos) === 125) {
+                pos++;
+            }
+            else {
+                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
+                isInvalidExtendedEscape = true;
+            }
+            if (isInvalidExtendedEscape) {
+                return "";
+            }
+            return utf16EncodeAsString(escapedValue);
+        }
+        function utf16EncodeAsString(codePoint) {
+            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
+            if (codePoint <= 65535) {
+                return String.fromCharCode(codePoint);
+            }
+            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
+            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
+            return String.fromCharCode(codeUnit1, codeUnit2);
+        }
+        function peekUnicodeEscape() {
+            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117) {
+                var start_1 = pos;
+                pos += 2;
+                var value = scanExactNumberOfHexDigits(4);
+                pos = start_1;
+                return value;
+            }
+            return -1;
+        }
+        function scanIdentifierParts() {
+            var result = "";
+            var start = pos;
+            while (pos < end) {
+                var ch = text.charCodeAt(pos);
+                if (isIdentifierPart(ch, languageVersion)) {
+                    pos++;
+                }
+                else if (ch === 92) {
+                    ch = peekUnicodeEscape();
+                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
+                        break;
+                    }
+                    result += text.substring(start, pos);
+                    result += String.fromCharCode(ch);
+                    pos += 6;
+                    start = pos;
+                }
+                else {
+                    break;
+                }
+            }
+            result += text.substring(start, pos);
+            return result;
+        }
+        function getIdentifierToken() {
+            var len = tokenValue.length;
+            if (len >= 2 && len <= 11) {
+                var ch = tokenValue.charCodeAt(0);
+                if (ch >= 97 && ch <= 122 && hasOwnProperty.call(textToToken, tokenValue)) {
+                    return token = textToToken[tokenValue];
+                }
+            }
+            return token = 69;
+        }
+        function scanBinaryOrOctalDigits(base) {
+            ts.Debug.assert(base !== 2 || base !== 8, "Expected either base 2 or base 8");
+            var value = 0;
+            var numberOfDigits = 0;
+            while (true) {
+                var ch = text.charCodeAt(pos);
+                var valueOfCh = ch - 48;
+                if (!isDigit(ch) || valueOfCh >= base) {
+                    break;
+                }
+                value = value * base + valueOfCh;
+                pos++;
+                numberOfDigits++;
+            }
+            if (numberOfDigits === 0) {
+                return -1;
+            }
+            return value;
+        }
+        function scan() {
+            startPos = pos;
+            hasExtendedUnicodeEscape = false;
+            precedingLineBreak = false;
+            tokenIsUnterminated = false;
+            while (true) {
+                tokenPos = pos;
+                if (pos >= end) {
+                    return token = 1;
+                }
+                var ch = text.charCodeAt(pos);
+                if (ch === 35 && pos === 0 && isShebangTrivia(text, pos)) {
+                    pos = scanShebangTrivia(text, pos);
+                    if (skipTrivia) {
+                        continue;
+                    }
+                    else {
+                        return token = 6;
+                    }
+                }
+                switch (ch) {
+                    case 10:
+                    case 13:
+                        precedingLineBreak = true;
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            if (ch === 13 && pos + 1 < end && text.charCodeAt(pos + 1) === 10) {
+                                pos += 2;
+                            }
+                            else {
+                                pos++;
+                            }
+                            return token = 4;
+                        }
+                    case 9:
+                    case 11:
+                    case 12:
+                    case 32:
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            while (pos < end && isWhiteSpace(text.charCodeAt(pos))) {
+                                pos++;
+                            }
+                            return token = 5;
+                        }
+                    case 33:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 33;
+                            }
+                            return pos += 2, token = 31;
+                        }
+                        pos++;
+                        return token = 49;
+                    case 34:
+                    case 39:
+                        tokenValue = scanString();
+                        return token = 9;
+                    case 96:
+                        return token = scanTemplateAndSetTokenValue();
+                    case 37:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 62;
+                        }
+                        pos++;
+                        return token = 40;
+                    case 38:
+                        if (text.charCodeAt(pos + 1) === 38) {
+                            return pos += 2, token = 51;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 66;
+                        }
+                        pos++;
+                        return token = 46;
+                    case 40:
+                        pos++;
+                        return token = 17;
+                    case 41:
+                        pos++;
+                        return token = 18;
+                    case 42:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 59;
+                        }
+                        if (text.charCodeAt(pos + 1) === 42) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 60;
+                            }
+                            return pos += 2, token = 38;
+                        }
+                        pos++;
+                        return token = 37;
+                    case 43:
+                        if (text.charCodeAt(pos + 1) === 43) {
+                            return pos += 2, token = 41;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 57;
+                        }
+                        pos++;
+                        return token = 35;
+                    case 44:
+                        pos++;
+                        return token = 24;
+                    case 45:
+                        if (text.charCodeAt(pos + 1) === 45) {
+                            return pos += 2, token = 42;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 58;
+                        }
+                        pos++;
+                        return token = 36;
+                    case 46:
+                        if (isDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = scanNumber();
+                            return token = 8;
+                        }
+                        if (text.charCodeAt(pos + 1) === 46 && text.charCodeAt(pos + 2) === 46) {
+                            return pos += 3, token = 22;
+                        }
+                        pos++;
+                        return token = 21;
+                    case 47:
+                        if (text.charCodeAt(pos + 1) === 47) {
+                            pos += 2;
+                            while (pos < end) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    break;
+                                }
+                                pos++;
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 2;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 42) {
+                            pos += 2;
+                            var commentClosed = false;
+                            while (pos < end) {
+                                var ch_2 = text.charCodeAt(pos);
+                                if (ch_2 === 42 && text.charCodeAt(pos + 1) === 47) {
+                                    pos += 2;
+                                    commentClosed = true;
+                                    break;
+                                }
+                                if (isLineBreak(ch_2)) {
+                                    precedingLineBreak = true;
+                                }
+                                pos++;
+                            }
+                            if (!commentClosed) {
+                                error(ts.Diagnostics.Asterisk_Slash_expected);
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                tokenIsUnterminated = !commentClosed;
+                                return token = 3;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 61;
+                        }
+                        pos++;
+                        return token = 39;
+                    case 48:
+                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 || text.charCodeAt(pos + 1) === 120)) {
+                            pos += 2;
+                            var value = scanMinimumNumberOfHexDigits(1);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 || text.charCodeAt(pos + 1) === 98)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(2);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Binary_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 || text.charCodeAt(pos + 1) === 111)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(8);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Octal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8;
+                        }
+                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = "" + scanOctalDigits();
+                            return token = 8;
+                        }
+                    case 49:
+                    case 50:
+                    case 51:
+                    case 52:
+                    case 53:
+                    case 54:
+                    case 55:
+                    case 56:
+                    case 57:
+                        tokenValue = scanNumber();
+                        return token = 8;
+                    case 58:
+                        pos++;
+                        return token = 54;
+                    case 59:
+                        pos++;
+                        return token = 23;
+                    case 60:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 60) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 63;
+                            }
+                            return pos += 2, token = 43;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 28;
+                        }
+                        if (languageVariant === 1 &&
+                            text.charCodeAt(pos + 1) === 47 &&
+                            text.charCodeAt(pos + 2) !== 42) {
+                            return pos += 2, token = 26;
+                        }
+                        pos++;
+                        return token = 25;
+                    case 61:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 32;
+                            }
+                            return pos += 2, token = 30;
+                        }
+                        if (text.charCodeAt(pos + 1) === 62) {
+                            return pos += 2, token = 34;
+                        }
+                        pos++;
+                        return token = 56;
+                    case 62:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7;
+                            }
+                        }
+                        pos++;
+                        return token = 27;
+                    case 63:
+                        pos++;
+                        return token = 53;
+                    case 91:
+                        pos++;
+                        return token = 19;
+                    case 93:
+                        pos++;
+                        return token = 20;
+                    case 94:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 68;
+                        }
+                        pos++;
+                        return token = 48;
+                    case 123:
+                        pos++;
+                        return token = 15;
+                    case 124:
+                        if (text.charCodeAt(pos + 1) === 124) {
+                            return pos += 2, token = 52;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 67;
+                        }
+                        pos++;
+                        return token = 47;
+                    case 125:
+                        pos++;
+                        return token = 16;
+                    case 126:
+                        pos++;
+                        return token = 50;
+                    case 64:
+                        pos++;
+                        return token = 55;
+                    case 92:
+                        var cookedChar = peekUnicodeEscape();
+                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
+                            pos += 6;
+                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
+                            return token = getIdentifierToken();
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0;
+                    default:
+                        if (isIdentifierStart(ch, languageVersion)) {
+                            pos++;
+                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
+                                pos++;
+                            tokenValue = text.substring(tokenPos, pos);
+                            if (ch === 92) {
+                                tokenValue += scanIdentifierParts();
+                            }
+                            return token = getIdentifierToken();
+                        }
+                        else if (isWhiteSpace(ch)) {
+                            pos++;
+                            continue;
+                        }
+                        else if (isLineBreak(ch)) {
+                            precedingLineBreak = true;
+                            pos++;
+                            continue;
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0;
+                }
+            }
+        }
+        function reScanGreaterToken() {
+            if (token === 27) {
+                if (text.charCodeAt(pos) === 62) {
+                    if (text.charCodeAt(pos + 1) === 62) {
+                        if (text.charCodeAt(pos + 2) === 61) {
+                            return pos += 3, token = 65;
+                        }
+                        return pos += 2, token = 45;
+                    }
+                    if (text.charCodeAt(pos + 1) === 61) {
+                        return pos += 2, token = 64;
+                    }
+                    pos++;
+                    return token = 44;
+                }
+                if (text.charCodeAt(pos) === 61) {
+                    pos++;
+                    return token = 29;
+                }
+            }
+            return token;
+        }
+        function reScanSlashToken() {
+            if (token === 39 || token === 61) {
+                var p = tokenPos + 1;
+                var inEscape = false;
+                var inCharacterClass = false;
+                while (true) {
+                    if (p >= end) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    var ch = text.charCodeAt(p);
+                    if (isLineBreak(ch)) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    if (inEscape) {
+                        inEscape = false;
+                    }
+                    else if (ch === 47 && !inCharacterClass) {
+                        p++;
+                        break;
+                    }
+                    else if (ch === 91) {
+                        inCharacterClass = true;
+                    }
+                    else if (ch === 92) {
+                        inEscape = true;
+                    }
+                    else if (ch === 93) {
+                        inCharacterClass = false;
+                    }
+                    p++;
+                }
+                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
+                    p++;
+                }
+                pos = p;
+                tokenValue = text.substring(tokenPos, pos);
+                token = 10;
+            }
+            return token;
+        }
+        function reScanTemplateToken() {
+            ts.Debug.assert(token === 16, "'reScanTemplateToken' should only be called on a '}'");
+            pos = tokenPos;
+            return token = scanTemplateAndSetTokenValue();
+        }
+        function reScanJsxToken() {
+            pos = tokenPos = startPos;
+            return token = scanJsxToken();
+        }
+        function scanJsxToken() {
+            startPos = tokenPos = pos;
+            if (pos >= end) {
+                return token = 1;
+            }
+            var char = text.charCodeAt(pos);
+            if (char === 60) {
+                if (text.charCodeAt(pos + 1) === 47) {
+                    pos += 2;
+                    return token = 26;
+                }
+                pos++;
+                return token = 25;
+            }
+            if (char === 123) {
+                pos++;
+                return token = 15;
+            }
+            while (pos < end) {
+                pos++;
+                char = text.charCodeAt(pos);
+                if ((char === 123) || (char === 60)) {
+                    break;
+                }
+            }
+            return token = 244;
+        }
+        function scanJsxIdentifier() {
+            if (tokenIsIdentifierOrKeyword(token)) {
+                var firstCharPosition = pos;
+                while (pos < end) {
+                    var ch = text.charCodeAt(pos);
+                    if (ch === 45 || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
+                        pos++;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
+            }
+            return token;
+        }
+        function scanJSDocToken() {
+            if (pos >= end) {
+                return token = 1;
+            }
+            startPos = pos;
+            var ch = text.charCodeAt(pos);
+            while (pos < end) {
+                ch = text.charCodeAt(pos);
+                if (isWhiteSpace(ch)) {
+                    pos++;
+                }
+                else {
+                    break;
+                }
+            }
+            tokenPos = pos;
+            switch (ch) {
+                case 64:
+                    return pos += 1, token = 55;
+                case 10:
+                case 13:
+                    return pos += 1, token = 4;
+                case 42:
+                    return pos += 1, token = 37;
+                case 123:
+                    return pos += 1, token = 15;
+                case 125:
+                    return pos += 1, token = 16;
+                case 91:
+                    return pos += 1, token = 19;
+                case 93:
+                    return pos += 1, token = 20;
+                case 61:
+                    return pos += 1, token = 56;
+                case 44:
+                    return pos += 1, token = 24;
+            }
+            if (isIdentifierStart(ch, 2)) {
+                pos++;
+                while (isIdentifierPart(text.charCodeAt(pos), 2) && pos < end) {
+                    pos++;
+                }
+                return token = 69;
+            }
+            else {
+                return pos += 1, token = 0;
+            }
+        }
+        function speculationHelper(callback, isLookahead) {
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var saveTokenValue = tokenValue;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var result = callback();
+            if (!result || isLookahead) {
+                pos = savePos;
+                startPos = saveStartPos;
+                tokenPos = saveTokenPos;
+                token = saveToken;
+                tokenValue = saveTokenValue;
+                precedingLineBreak = savePrecedingLineBreak;
+            }
+            return result;
+        }
+        function scanRange(start, length, callback) {
+            var saveEnd = end;
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var saveTokenValue = tokenValue;
+            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
+            var saveTokenIsUnterminated = tokenIsUnterminated;
+            setText(text, start, length);
+            var result = callback();
+            end = saveEnd;
+            pos = savePos;
+            startPos = saveStartPos;
+            tokenPos = saveTokenPos;
+            token = saveToken;
+            precedingLineBreak = savePrecedingLineBreak;
+            tokenValue = saveTokenValue;
+            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
+            tokenIsUnterminated = saveTokenIsUnterminated;
+            return result;
+        }
+        function lookAhead(callback) {
+            return speculationHelper(callback, true);
+        }
+        function tryScan(callback) {
+            return speculationHelper(callback, false);
+        }
+        function setText(newText, start, length) {
+            text = newText || "";
+            end = length === undefined ? text.length : start + length;
+            setTextPos(start || 0);
+        }
+        function setOnError(errorCallback) {
+            onError = errorCallback;
+        }
+        function setScriptTarget(scriptTarget) {
+            languageVersion = scriptTarget;
+        }
+        function setLanguageVariant(variant) {
+            languageVariant = variant;
+        }
+        function setTextPos(textPos) {
+            ts.Debug.assert(textPos >= 0);
+            pos = textPos;
+            startPos = textPos;
+            tokenPos = textPos;
+            token = 0;
+            precedingLineBreak = false;
+            tokenValue = undefined;
+            hasExtendedUnicodeEscape = false;
+            tokenIsUnterminated = false;
+        }
+    }
+    ts.createScanner = createScanner;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.optionDeclarations = [
+        {
+            name: "charset",
+            type: "string"
+        },
+        {
+            name: "declaration",
+            shortName: "d",
+            type: "boolean",
+            description: ts.Diagnostics.Generates_corresponding_d_ts_file
+        },
+        {
+            name: "declarationDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "diagnostics",
+            type: "boolean"
+        },
+        {
+            name: "emitBOM",
+            type: "boolean"
+        },
+        {
+            name: "help",
+            shortName: "h",
+            type: "boolean",
+            description: ts.Diagnostics.Print_this_message
+        },
+        {
+            name: "help",
+            shortName: "?",
+            type: "boolean"
+        },
+        {
+            name: "init",
+            type: "boolean",
+            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file
+        },
+        {
+            name: "inlineSourceMap",
+            type: "boolean"
+        },
+        {
+            name: "inlineSources",
+            type: "boolean"
+        },
+        {
+            name: "jsx",
+            type: {
+                "preserve": 1,
+                "react": 2
+            },
+            paramType: ts.Diagnostics.KIND,
+            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_or_react
+        },
+        {
+            name: "reactNamespace",
+            type: "string",
+            description: ts.Diagnostics.Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit
+        },
+        {
+            name: "listFiles",
+            type: "boolean"
+        },
+        {
+            name: "locale",
+            type: "string"
+        },
+        {
+            name: "mapRoot",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
+            paramType: ts.Diagnostics.LOCATION
+        },
+        {
+            name: "module",
+            shortName: "m",
+            type: {
+                "none": ts.ModuleKind.None,
+                "commonjs": ts.ModuleKind.CommonJS,
+                "amd": ts.ModuleKind.AMD,
+                "system": ts.ModuleKind.System,
+                "umd": ts.ModuleKind.UMD,
+                "es6": ts.ModuleKind.ES6,
+                "es2015": ts.ModuleKind.ES2015
+            },
+            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
+            paramType: ts.Diagnostics.KIND
+        },
+        {
+            name: "newLine",
+            type: {
+                "crlf": 0,
+                "lf": 1
+            },
+            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
+            paramType: ts.Diagnostics.NEWLINE
+        },
+        {
+            name: "noEmit",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_outputs
+        },
+        {
+            name: "noEmitHelpers",
+            type: "boolean"
+        },
+        {
+            name: "noEmitOnError",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported
+        },
+        {
+            name: "noImplicitAny",
+            type: "boolean",
+            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type
+        },
+        {
+            name: "noImplicitThis",
+            type: "boolean",
+            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type
+        },
+        {
+            name: "noLib",
+            type: "boolean"
+        },
+        {
+            name: "noResolve",
+            type: "boolean"
+        },
+        {
+            name: "skipDefaultLibCheck",
+            type: "boolean"
+        },
+        {
+            name: "skipLibCheck",
+            type: "boolean",
+            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
+        },
+        {
+            name: "out",
+            type: "string",
+            isFilePath: false,
+            paramType: ts.Diagnostics.FILE
+        },
+        {
+            name: "outFile",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
+            paramType: ts.Diagnostics.FILE
+        },
+        {
+            name: "outDir",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "preserveConstEnums",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
+        },
+        {
+            name: "pretty",
+            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental,
+            type: "boolean"
+        },
+        {
+            name: "project",
+            shortName: "p",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Compile_the_project_in_the_given_directory,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "removeComments",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_comments_to_output
+        },
+        {
+            name: "rootDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.LOCATION,
+            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir
+        },
+        {
+            name: "isolatedModules",
+            type: "boolean"
+        },
+        {
+            name: "sourceMap",
+            type: "boolean",
+            description: ts.Diagnostics.Generates_corresponding_map_file
+        },
+        {
+            name: "sourceRoot",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
+            paramType: ts.Diagnostics.LOCATION
+        },
+        {
+            name: "suppressExcessPropertyErrors",
+            type: "boolean",
+            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
+            experimental: true
+        },
+        {
+            name: "suppressImplicitAnyIndexErrors",
+            type: "boolean",
+            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures
+        },
+        {
+            name: "stripInternal",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
+            experimental: true
+        },
+        {
+            name: "target",
+            shortName: "t",
+            type: {
+                "es3": 0,
+                "es5": 1,
+                "es6": 2,
+                "es2015": 2
+            },
+            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
+            paramType: ts.Diagnostics.VERSION
+        },
+        {
+            name: "version",
+            shortName: "v",
+            type: "boolean",
+            description: ts.Diagnostics.Print_the_compiler_s_version
+        },
+        {
+            name: "watch",
+            shortName: "w",
+            type: "boolean",
+            description: ts.Diagnostics.Watch_input_files
+        },
+        {
+            name: "experimentalDecorators",
+            type: "boolean",
+            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
+        },
+        {
+            name: "emitDecoratorMetadata",
+            type: "boolean",
+            experimental: true,
+            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
+        },
+        {
+            name: "moduleResolution",
+            type: {
+                "node": ts.ModuleResolutionKind.NodeJs,
+                "classic": ts.ModuleResolutionKind.Classic
+            },
+            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6
+        },
+        {
+            name: "allowUnusedLabels",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
+        },
+        {
+            name: "noImplicitReturns",
+            type: "boolean",
+            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
+        },
+        {
+            name: "noFallthroughCasesInSwitch",
+            type: "boolean",
+            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
+        },
+        {
+            name: "allowUnreachableCode",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
+        },
+        {
+            name: "forceConsistentCasingInFileNames",
+            type: "boolean",
+            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
+        },
+        {
+            name: "baseUrl",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
+        },
+        {
+            name: "paths",
+            type: "object",
+            isTSConfigOnly: true
+        },
+        {
+            name: "rootDirs",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "rootDirs",
+                type: "string",
+                isFilePath: true
+            }
+        },
+        {
+            name: "typesSearchPaths",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "typesSearchPaths",
+                type: "string",
+                isFilePath: true
+            }
+        },
+        {
+            name: "typesRoot",
+            type: "string"
+        },
+        {
+            name: "types",
+            type: "list",
+            element: {
+                name: "types",
+                type: "string"
+            },
+            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
+        },
+        {
+            name: "traceResolution",
+            type: "boolean",
+            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
+        },
+        {
+            name: "allowJs",
+            type: "boolean",
+            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
+        },
+        {
+            name: "allowSyntheticDefaultImports",
+            type: "boolean",
+            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
+        },
+        {
+            name: "noImplicitUseStrict",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
+        },
+        {
+            name: "listEmittedFiles",
+            type: "boolean"
+        },
+        {
+            name: "lib",
+            type: "list",
+            element: {
+                name: "lib",
+                type: {
+                    "es5": "lib.es5.d.ts",
+                    "es6": "lib.es2015.d.ts",
+                    "es2015": "lib.es2015.d.ts",
+                    "es7": "lib.es2016.d.ts",
+                    "es2016": "lib.es2016.d.ts",
+                    "es2017": "lib.es2017.d.ts",
+                    "dom": "lib.dom.d.ts",
+                    "webworker": "lib.webworker.d.ts",
+                    "scripthost": "lib.scripthost.d.ts",
+                    "es2015.core": "lib.es2015.core.d.ts",
+                    "es2015.collection": "lib.es2015.collection.d.ts",
+                    "es2015.generator": "lib.es2015.generator.d.ts",
+                    "es2015.iterable": "lib.es2015.iterable.d.ts",
+                    "es2015.promise": "lib.es2015.promise.d.ts",
+                    "es2015.proxy": "lib.es2015.proxy.d.ts",
+                    "es2015.reflect": "lib.es2015.reflect.d.ts",
+                    "es2015.symbol": "lib.es2015.symbol.d.ts",
+                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
+                    "es2016.array.include": "lib.es2016.array.include.d.ts",
+                    "es2017.object": "lib.es2017.object.d.ts",
+                    "es2017.sharedmemory": "lib.es2017.sharedmemory.d.ts"
+                }
+            },
+            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
+        },
+        {
+            name: "strictNullChecks",
+            type: "boolean",
+            description: ts.Diagnostics.Enable_strict_null_checks
+        }
+    ];
+    ts.typingOptionDeclarations = [
+        {
+            name: "enableAutoDiscovery",
+            type: "boolean"
+        },
+        {
+            name: "include",
+            type: "list",
+            element: {
+                name: "include",
+                type: "string"
+            }
+        },
+        {
+            name: "exclude",
+            type: "list",
+            element: {
+                name: "exclude",
+                type: "string"
+            }
+        }
+    ];
+    var optionNameMapCache;
+    function getOptionNameMap() {
+        if (optionNameMapCache) {
+            return optionNameMapCache;
+        }
+        var optionNameMap = {};
+        var shortOptionNames = {};
+        ts.forEach(ts.optionDeclarations, function (option) {
+            optionNameMap[option.name.toLowerCase()] = option;
+            if (option.shortName) {
+                shortOptionNames[option.shortName] = option.name;
+            }
+        });
+        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
+        return optionNameMapCache;
+    }
+    ts.getOptionNameMap = getOptionNameMap;
+    function createCompilerDiagnosticForInvalidCustomType(opt) {
+        var namesOfType = [];
+        ts.forEachKey(opt.type, function (key) {
+            namesOfType.push(" '" + key + "'");
+        });
+        return ts.createCompilerDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
+    }
+    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
+    function parseCustomTypeOption(opt, value, errors) {
+        var key = trimString((value || "")).toLowerCase();
+        var map = opt.type;
+        if (ts.hasProperty(map, key)) {
+            return map[key];
+        }
+        else {
+            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
+        }
+    }
+    ts.parseCustomTypeOption = parseCustomTypeOption;
+    function parseListTypeOption(opt, value, errors) {
+        var values = trimString((value || "")).split(",");
+        switch (opt.element.type) {
+            case "number":
+                return ts.map(values, parseInt);
+            case "string":
+                return ts.map(values, function (v) { return v || ""; });
+            default:
+                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
+        }
+    }
+    ts.parseListTypeOption = parseListTypeOption;
+    function parseCommandLine(commandLine, readFile) {
+        var options = {};
+        var fileNames = [];
+        var errors = [];
+        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
+        parseStrings(commandLine);
+        return {
+            options: options,
+            fileNames: fileNames,
+            errors: errors
+        };
+        function parseStrings(args) {
+            var i = 0;
+            while (i < args.length) {
+                var s = args[i];
+                i++;
+                if (s.charCodeAt(0) === 64) {
+                    parseResponseFile(s.slice(1));
+                }
+                else if (s.charCodeAt(0) === 45) {
+                    s = s.slice(s.charCodeAt(1) === 45 ? 2 : 1).toLowerCase();
+                    if (ts.hasProperty(shortOptionNames, s)) {
+                        s = shortOptionNames[s];
+                    }
+                    if (ts.hasProperty(optionNameMap, s)) {
+                        var opt = optionNameMap[s];
+                        if (opt.isTSConfigOnly) {
+                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
+                        }
+                        else {
+                            if (!args[i] && opt.type !== "boolean") {
+                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
+                            }
+                            switch (opt.type) {
+                                case "number":
+                                    options[opt.name] = parseInt(args[i]);
+                                    i++;
+                                    break;
+                                case "boolean":
+                                    options[opt.name] = true;
+                                    break;
+                                case "string":
+                                    options[opt.name] = args[i] || "";
+                                    i++;
+                                    break;
+                                case "list":
+                                    options[opt.name] = parseListTypeOption(opt, args[i], errors);
+                                    i++;
+                                    break;
+                                default:
+                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
+                                    i++;
+                                    break;
+                            }
+                        }
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
+                    }
+                }
+                else {
+                    fileNames.push(s);
+                }
+            }
+        }
+        function parseResponseFile(fileName) {
+            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
+            if (!text) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
+                return;
+            }
+            var args = [];
+            var pos = 0;
+            while (true) {
+                while (pos < text.length && text.charCodeAt(pos) <= 32)
+                    pos++;
+                if (pos >= text.length)
+                    break;
+                var start = pos;
+                if (text.charCodeAt(start) === 34) {
+                    pos++;
+                    while (pos < text.length && text.charCodeAt(pos) !== 34)
+                        pos++;
+                    if (pos < text.length) {
+                        args.push(text.substring(start + 1, pos));
+                        pos++;
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
+                    }
+                }
+                else {
+                    while (text.charCodeAt(pos) > 32)
+                        pos++;
+                    args.push(text.substring(start, pos));
+                }
+            }
+            parseStrings(args);
+        }
+    }
+    ts.parseCommandLine = parseCommandLine;
+    function readConfigFile(fileName, readFile) {
+        var text = "";
+        try {
+            text = readFile(fileName);
+        }
+        catch (e) {
+            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
+        }
+        return parseConfigFileTextToJson(fileName, text);
+    }
+    ts.readConfigFile = readConfigFile;
+    function parseConfigFileTextToJson(fileName, jsonText) {
+        try {
+            var jsonTextWithoutComments = removeComments(jsonText);
+            return { config: /\S/.test(jsonTextWithoutComments) ? JSON.parse(jsonTextWithoutComments) : {} };
+        }
+        catch (e) {
+            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) };
+        }
+    }
+    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
+    function removeComments(jsonText) {
+        var output = "";
+        var scanner = ts.createScanner(1, false, 0, jsonText);
+        var token;
+        while ((token = scanner.scan()) !== 1) {
+            switch (token) {
+                case 2:
+                case 3:
+                    output += scanner.getTokenText().replace(/\S/g, " ");
+                    break;
+                default:
+                    output += scanner.getTokenText();
+                    break;
+            }
+        }
+        return output;
+    }
+    var IgnoreFileNamePattern = /(\.min\.js$)|([\\/]\.[\w.])/;
+    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName) {
+        if (existingOptions === void 0) { existingOptions = {}; }
+        var errors = [];
+        var compilerOptions = convertCompilerOptionsFromJsonWorker(json["compilerOptions"], basePath, errors, configFileName);
+        var options = ts.extend(existingOptions, compilerOptions);
+        var typingOptions = convertTypingOptionsFromJsonWorker(json["typingOptions"], basePath, errors, configFileName);
+        options.configFilePath = configFileName;
+        var fileNames = getFileNames(errors);
+        return {
+            options: options,
+            fileNames: fileNames,
+            typingOptions: typingOptions,
+            raw: json,
+            errors: errors
+        };
+        function getFileNames(errors) {
+            var fileNames = [];
+            if (ts.hasProperty(json, "files")) {
+                if (ts.isArray(json["files"])) {
+                    fileNames = ts.map(json["files"], function (s) { return ts.combinePaths(basePath, s); });
+                }
+                else {
+                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
+                }
+            }
+            else {
+                var filesSeen = {};
+                var exclude = [];
+                if (ts.isArray(json["exclude"])) {
+                    exclude = json["exclude"];
+                }
+                else {
+                    exclude = ["node_modules", "bower_components", "jspm_packages"];
+                }
+                var outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
+                if (outDir) {
+                    exclude.push(outDir);
+                }
+                exclude = ts.map(exclude, function (e) { return ts.getNormalizedAbsolutePath(e, basePath); });
+                var supportedExtensions = ts.getSupportedExtensions(options);
+                ts.Debug.assert(ts.indexOf(supportedExtensions, ".ts") < ts.indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
+                for (var _i = 0, supportedExtensions_1 = supportedExtensions; _i < supportedExtensions_1.length; _i++) {
+                    var extension = supportedExtensions_1[_i];
+                    var filesInDirWithExtension = host.readDirectory(basePath, extension, exclude);
+                    for (var _a = 0, filesInDirWithExtension_1 = filesInDirWithExtension; _a < filesInDirWithExtension_1.length; _a++) {
+                        var fileName = filesInDirWithExtension_1[_a];
+                        if (extension === ".ts" && ts.fileExtensionIs(fileName, ".d.ts")) {
+                            continue;
+                        }
+                        if (IgnoreFileNamePattern.test(fileName)) {
+                            continue;
+                        }
+                        if (extension === ".d.ts" || (options.allowJs && ts.contains(ts.supportedJavascriptExtensions, extension))) {
+                            var baseName = fileName.substr(0, fileName.length - extension.length);
+                            if (ts.hasProperty(filesSeen, baseName + ".ts") || ts.hasProperty(filesSeen, baseName + ".tsx")) {
+                                continue;
+                            }
+                        }
+                        filesSeen[fileName] = true;
+                        fileNames.push(fileName);
+                    }
+                }
+            }
+            if (ts.hasProperty(json, "excludes") && !ts.hasProperty(json, "exclude")) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
+            }
+            return fileNames;
+        }
+    }
+    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
+    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
+    function convertTypingOptionsFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertTypingOptionsFromJson = convertTypingOptionsFromJson;
+    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = ts.getBaseFileName(configFileName) === "jsconfig.json" ? { allowJs: true } : {};
+        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
+        return options;
+    }
+    function convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
+            ? { enableAutoDiscovery: true, include: [], exclude: [] }
+            : { enableAutoDiscovery: false, include: [], exclude: [] };
+        convertOptionsFromJson(ts.typingOptionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_typing_option_0, errors);
+        return options;
+    }
+    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
+        if (!jsonOptions) {
+            return;
+        }
+        var optionNameMap = ts.arrayToMap(optionDeclarations, function (opt) { return opt.name; });
+        for (var id in jsonOptions) {
+            if (ts.hasProperty(optionNameMap, id)) {
+                var opt = optionNameMap[id];
+                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
+            }
+            else {
+                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
+            }
+        }
+    }
+    function convertJsonOption(opt, value, basePath, errors) {
+        var optType = opt.type;
+        var expectedType = typeof optType === "string" ? optType : "string";
+        if (optType === "list" && ts.isArray(value)) {
+            return convertJsonOptionOfListType(opt, value, basePath, errors);
+        }
+        else if (typeof value === expectedType) {
+            if (typeof optType !== "string") {
+                return convertJsonOptionOfCustomType(opt, value, errors);
+            }
+            else {
+                if (opt.isFilePath) {
+                    value = ts.normalizePath(ts.combinePaths(basePath, value));
+                    if (value === "") {
+                        value = ".";
+                    }
+                }
+            }
+            return value;
+        }
+        else {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, expectedType));
+        }
+    }
+    function convertJsonOptionOfCustomType(opt, value, errors) {
+        var key = value.toLowerCase();
+        if (ts.hasProperty(opt.type, key)) {
+            return opt.type[key];
+        }
+        else {
+            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
+        }
+    }
+    function convertJsonOptionOfListType(option, values, basePath, errors) {
+        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
+    }
+    function trimString(s) {
+        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
+    }
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getDeclarationOfKind(symbol, kind) {
+        var declarations = symbol.declarations;
+        if (declarations) {
+            for (var _i = 0, declarations_1 = declarations; _i < declarations_1.length; _i++) {
+                var declaration = declarations_1[_i];
+                if (declaration.kind === kind) {
+                    return declaration;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getDeclarationOfKind = getDeclarationOfKind;
+    var stringWriters = [];
+    function getSingleLineStringWriter() {
+        if (stringWriters.length === 0) {
+            var str_1 = "";
+            var writeText = function (text) { return str_1 += text; };
+            return {
+                string: function () { return str_1; },
+                writeKeyword: writeText,
+                writeOperator: writeText,
+                writePunctuation: writeText,
+                writeSpace: writeText,
+                writeStringLiteral: writeText,
+                writeParameter: writeText,
+                writeSymbol: writeText,
+                writeLine: function () { return str_1 += " "; },
+                increaseIndent: function () { },
+                decreaseIndent: function () { },
+                clear: function () { return str_1 = ""; },
+                trackSymbol: function () { },
+                reportInaccessibleThisError: function () { }
+            };
+        }
+        return stringWriters.pop();
+    }
+    ts.getSingleLineStringWriter = getSingleLineStringWriter;
+    function releaseStringWriter(writer) {
+        writer.clear();
+        stringWriters.push(writer);
+    }
+    ts.releaseStringWriter = releaseStringWriter;
+    function getFullWidth(node) {
+        return node.end - node.pos;
+    }
+    ts.getFullWidth = getFullWidth;
+    function mapIsEqualTo(map1, map2) {
+        if (!map1 || !map2) {
+            return map1 === map2;
+        }
+        return containsAll(map1, map2) && containsAll(map2, map1);
+    }
+    ts.mapIsEqualTo = mapIsEqualTo;
+    function containsAll(map, other) {
+        for (var key in map) {
+            if (!ts.hasProperty(map, key)) {
+                continue;
+            }
+            if (!ts.hasProperty(other, key) || map[key] !== other[key]) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function arrayIsEqualTo(array1, array2, equaler) {
+        if (!array1 || !array2) {
+            return array1 === array2;
+        }
+        if (array1.length !== array2.length) {
+            return false;
+        }
+        for (var i = 0; i < array1.length; i++) {
+            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
+            if (!equals) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.arrayIsEqualTo = arrayIsEqualTo;
+    function hasResolvedModule(sourceFile, moduleNameText) {
+        return sourceFile.resolvedModules && ts.hasProperty(sourceFile.resolvedModules, moduleNameText);
+    }
+    ts.hasResolvedModule = hasResolvedModule;
+    function getResolvedModule(sourceFile, moduleNameText) {
+        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
+    }
+    ts.getResolvedModule = getResolvedModule;
+    function setResolvedModule(sourceFile, moduleNameText, resolvedModule) {
+        if (!sourceFile.resolvedModules) {
+            sourceFile.resolvedModules = {};
+        }
+        sourceFile.resolvedModules[moduleNameText] = resolvedModule;
+    }
+    ts.setResolvedModule = setResolvedModule;
+    function setResolvedTypeReferenceDirective(sourceFile, typeReferenceDirectiveName, resolvedTypeReferenceDirective) {
+        if (!sourceFile.resolvedTypeReferenceDirectiveNames) {
+            sourceFile.resolvedTypeReferenceDirectiveNames = {};
+        }
+        sourceFile.resolvedTypeReferenceDirectiveNames[typeReferenceDirectiveName] = resolvedTypeReferenceDirective;
+    }
+    ts.setResolvedTypeReferenceDirective = setResolvedTypeReferenceDirective;
+    function moduleResolutionIsEqualTo(oldResolution, newResolution) {
+        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport;
+    }
+    ts.moduleResolutionIsEqualTo = moduleResolutionIsEqualTo;
+    function typeDirectiveIsEqualTo(oldResolution, newResolution) {
+        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.primary === newResolution.primary;
+    }
+    ts.typeDirectiveIsEqualTo = typeDirectiveIsEqualTo;
+    function hasChangesInResolutions(names, newResolutions, oldResolutions, comparer) {
+        if (names.length !== newResolutions.length) {
+            return false;
+        }
+        for (var i = 0; i < names.length; i++) {
+            var newResolution = newResolutions[i];
+            var oldResolution = oldResolutions && ts.hasProperty(oldResolutions, names[i]) ? oldResolutions[names[i]] : undefined;
+            var changed = oldResolution
+                ? !newResolution || !comparer(oldResolution, newResolution)
+                : newResolution;
+            if (changed) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.hasChangesInResolutions = hasChangesInResolutions;
+    function containsParseError(node) {
+        aggregateChildData(node);
+        return (node.flags & 268435456) !== 0;
+    }
+    ts.containsParseError = containsParseError;
+    function aggregateChildData(node) {
+        if (!(node.flags & 536870912)) {
+            var thisNodeOrAnySubNodesHasError = ((node.flags & 67108864) !== 0) ||
+                ts.forEachChild(node, containsParseError);
+            if (thisNodeOrAnySubNodesHasError) {
+                node.flags |= 268435456;
+            }
+            node.flags |= 536870912;
+        }
+    }
+    function getSourceFileOfNode(node) {
+        while (node && node.kind !== 256) {
+            node = node.parent;
+        }
+        return node;
+    }
+    ts.getSourceFileOfNode = getSourceFileOfNode;
+    function isStatementWithLocals(node) {
+        switch (node.kind) {
+            case 199:
+            case 227:
+            case 206:
+            case 207:
+            case 208:
+                return true;
+        }
+        return false;
+    }
+    ts.isStatementWithLocals = isStatementWithLocals;
+    function getStartPositionOfLine(line, sourceFile) {
+        ts.Debug.assert(line >= 0);
+        return ts.getLineStarts(sourceFile)[line];
+    }
+    ts.getStartPositionOfLine = getStartPositionOfLine;
+    function nodePosToString(node) {
+        var file = getSourceFileOfNode(node);
+        var loc = ts.getLineAndCharacterOfPosition(file, node.pos);
+        return file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + ")";
+    }
+    ts.nodePosToString = nodePosToString;
+    function getStartPosOfNode(node) {
+        return node.pos;
+    }
+    ts.getStartPosOfNode = getStartPosOfNode;
+    function getEndLinePosition(line, sourceFile) {
+        ts.Debug.assert(line >= 0);
+        var lineStarts = ts.getLineStarts(sourceFile);
+        var lineIndex = line;
+        var sourceText = sourceFile.text;
+        if (lineIndex + 1 === lineStarts.length) {
+            return sourceText.length - 1;
+        }
+        else {
+            var start = lineStarts[lineIndex];
+            var pos = lineStarts[lineIndex + 1] - 1;
+            ts.Debug.assert(ts.isLineBreak(sourceText.charCodeAt(pos)));
+            while (start <= pos && ts.isLineBreak(sourceText.charCodeAt(pos))) {
+                pos--;
+            }
+            return pos;
+        }
+    }
+    ts.getEndLinePosition = getEndLinePosition;
+    function nodeIsMissing(node) {
+        if (!node) {
+            return true;
+        }
+        return node.pos === node.end && node.pos >= 0 && node.kind !== 1;
+    }
+    ts.nodeIsMissing = nodeIsMissing;
+    function nodeIsPresent(node) {
+        return !nodeIsMissing(node);
+    }
+    ts.nodeIsPresent = nodeIsPresent;
+    function getTokenPosOfNode(node, sourceFile, includeJsDocComment) {
+        if (nodeIsMissing(node)) {
+            return node.pos;
+        }
+        if (isJSDocNode(node)) {
+            return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos, false, true);
+        }
+        if (includeJsDocComment && node.jsDocComments && node.jsDocComments.length > 0) {
+            return getTokenPosOfNode(node.jsDocComments[0]);
+        }
+        if (node.kind === 282 && node._children.length > 0) {
+            return getTokenPosOfNode(node._children[0], sourceFile, includeJsDocComment);
+        }
+        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
+    }
+    ts.getTokenPosOfNode = getTokenPosOfNode;
+    function isJSDocNode(node) {
+        return node.kind >= 257 && node.kind <= 281;
+    }
+    ts.isJSDocNode = isJSDocNode;
+    function getNonDecoratorTokenPosOfNode(node, sourceFile) {
+        if (nodeIsMissing(node) || !node.decorators) {
+            return getTokenPosOfNode(node, sourceFile);
+        }
+        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.decorators.end);
+    }
+    ts.getNonDecoratorTokenPosOfNode = getNonDecoratorTokenPosOfNode;
+    function getSourceTextOfNodeFromSourceFile(sourceFile, node, includeTrivia) {
+        if (includeTrivia === void 0) { includeTrivia = false; }
+        if (nodeIsMissing(node)) {
+            return "";
+        }
+        var text = sourceFile.text;
+        return text.substring(includeTrivia ? node.pos : ts.skipTrivia(text, node.pos), node.end);
+    }
+    ts.getSourceTextOfNodeFromSourceFile = getSourceTextOfNodeFromSourceFile;
+    function getTextOfNodeFromSourceText(sourceText, node) {
+        if (nodeIsMissing(node)) {
+            return "";
+        }
+        return sourceText.substring(ts.skipTrivia(sourceText, node.pos), node.end);
+    }
+    ts.getTextOfNodeFromSourceText = getTextOfNodeFromSourceText;
+    function getTextOfNode(node, includeTrivia) {
+        if (includeTrivia === void 0) { includeTrivia = false; }
+        return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
+    }
+    ts.getTextOfNode = getTextOfNode;
+    function escapeIdentifier(identifier) {
+        return identifier.length >= 2 && identifier.charCodeAt(0) === 95 && identifier.charCodeAt(1) === 95 ? "_" + identifier : identifier;
+    }
+    ts.escapeIdentifier = escapeIdentifier;
+    function unescapeIdentifier(identifier) {
+        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 && identifier.charCodeAt(1) === 95 && identifier.charCodeAt(2) === 95 ? identifier.substr(1) : identifier;
+    }
+    ts.unescapeIdentifier = unescapeIdentifier;
+    function makeIdentifierFromModuleName(moduleName) {
+        return ts.getBaseFileName(moduleName).replace(/^(\d)/, "_$1").replace(/\W/g, "_");
+    }
+    ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
+    function isBlockOrCatchScoped(declaration) {
+        return (getCombinedNodeFlags(declaration) & 3072) !== 0 ||
+            isCatchClauseVariableDeclaration(declaration);
+    }
+    ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
+    function isAmbientModule(node) {
+        return node && node.kind === 225 &&
+            (node.name.kind === 9 || isGlobalScopeAugmentation(node));
+    }
+    ts.isAmbientModule = isAmbientModule;
+    function isBlockScopedContainerTopLevel(node) {
+        return node.kind === 256 ||
+            node.kind === 225 ||
+            isFunctionLike(node) ||
+            isFunctionBlock(node);
+    }
+    ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
+    function isGlobalScopeAugmentation(module) {
+        return !!(module.flags & 131072);
+    }
+    ts.isGlobalScopeAugmentation = isGlobalScopeAugmentation;
+    function isExternalModuleAugmentation(node) {
+        if (!node || !isAmbientModule(node)) {
+            return false;
+        }
+        switch (node.parent.kind) {
+            case 256:
+                return ts.isExternalModule(node.parent);
+            case 226:
+                return isAmbientModule(node.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
+        }
+        return false;
+    }
+    ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
+    function getEnclosingBlockScopeContainer(node) {
+        var current = node.parent;
+        while (current) {
+            if (isFunctionLike(current)) {
+                return current;
+            }
+            switch (current.kind) {
+                case 256:
+                case 227:
+                case 252:
+                case 225:
+                case 206:
+                case 207:
+                case 208:
+                    return current;
+                case 199:
+                    if (!isFunctionLike(current.parent)) {
+                        return current;
+                    }
+            }
+            current = current.parent;
+        }
+    }
+    ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
+    function isCatchClauseVariableDeclaration(declaration) {
+        return declaration &&
+            declaration.kind === 218 &&
+            declaration.parent &&
+            declaration.parent.kind === 252;
+    }
+    ts.isCatchClauseVariableDeclaration = isCatchClauseVariableDeclaration;
+    function declarationNameToString(name) {
+        return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
+    }
+    ts.declarationNameToString = declarationNameToString;
+    function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
+        var sourceFile = getSourceFileOfNode(node);
+        var span = getErrorSpanForNode(sourceFile, node);
+        return ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2);
+    }
+    ts.createDiagnosticForNode = createDiagnosticForNode;
+    function createDiagnosticForNodeFromMessageChain(node, messageChain) {
+        var sourceFile = getSourceFileOfNode(node);
+        var span = getErrorSpanForNode(sourceFile, node);
+        return {
+            file: sourceFile,
+            start: span.start,
+            length: span.length,
+            code: messageChain.code,
+            category: messageChain.category,
+            messageText: messageChain.next ? messageChain : messageChain.messageText
+        };
+    }
+    ts.createDiagnosticForNodeFromMessageChain = createDiagnosticForNodeFromMessageChain;
+    function getSpanOfTokenAtPosition(sourceFile, pos) {
+        var scanner = ts.createScanner(sourceFile.languageVersion, true, sourceFile.languageVariant, sourceFile.text, undefined, pos);
+        scanner.scan();
+        var start = scanner.getTokenPos();
+        return ts.createTextSpanFromBounds(start, scanner.getTextPos());
+    }
+    ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
+    function getErrorSpanForArrowFunction(sourceFile, node) {
+        var pos = ts.skipTrivia(sourceFile.text, node.pos);
+        if (node.body && node.body.kind === 199) {
+            var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
+            var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
+            if (startLine < endLine) {
+                return ts.createTextSpan(pos, getEndLinePosition(startLine, sourceFile) - pos + 1);
+            }
+        }
+        return ts.createTextSpanFromBounds(pos, node.end);
+    }
+    function getErrorSpanForNode(sourceFile, node) {
+        var errorNode = node;
+        switch (node.kind) {
+            case 256:
+                var pos_1 = ts.skipTrivia(sourceFile.text, 0, false);
+                if (pos_1 === sourceFile.text.length) {
+                    return ts.createTextSpan(0, 0);
+                }
+                return getSpanOfTokenAtPosition(sourceFile, pos_1);
+            case 218:
+            case 169:
+            case 221:
+            case 192:
+            case 222:
+            case 225:
+            case 224:
+            case 255:
+            case 220:
+            case 179:
+            case 147:
+            case 149:
+            case 150:
+            case 223:
+                errorNode = node.name;
+                break;
+            case 180:
+                return getErrorSpanForArrowFunction(sourceFile, node);
+        }
+        if (errorNode === undefined) {
+            return getSpanOfTokenAtPosition(sourceFile, node.pos);
+        }
+        var pos = nodeIsMissing(errorNode)
+            ? errorNode.pos
+            : ts.skipTrivia(sourceFile.text, errorNode.pos);
+        return ts.createTextSpanFromBounds(pos, errorNode.end);
+    }
+    ts.getErrorSpanForNode = getErrorSpanForNode;
+    function isExternalOrCommonJsModule(file) {
+        return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
+    }
+    ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
+    function isDeclarationFile(file) {
+        return file.isDeclarationFile;
+    }
+    ts.isDeclarationFile = isDeclarationFile;
+    function isConstEnumDeclaration(node) {
+        return node.kind === 224 && isConst(node);
+    }
+    ts.isConstEnumDeclaration = isConstEnumDeclaration;
+    function walkUpBindingElementsAndPatterns(node) {
+        while (node && (node.kind === 169 || isBindingPattern(node))) {
+            node = node.parent;
+        }
+        return node;
+    }
+    function getCombinedNodeFlags(node) {
+        node = walkUpBindingElementsAndPatterns(node);
+        var flags = node.flags;
+        if (node.kind === 218) {
+            node = node.parent;
+        }
+        if (node && node.kind === 219) {
+            flags |= node.flags;
+            node = node.parent;
+        }
+        if (node && node.kind === 200) {
+            flags |= node.flags;
+        }
+        return flags;
+    }
+    ts.getCombinedNodeFlags = getCombinedNodeFlags;
+    function isConst(node) {
+        return !!(getCombinedNodeFlags(node) & 2048);
+    }
+    ts.isConst = isConst;
+    function isLet(node) {
+        return !!(getCombinedNodeFlags(node) & 1024);
+    }
+    ts.isLet = isLet;
+    function isSuperCallExpression(n) {
+        return n.kind === 174 && n.expression.kind === 95;
+    }
+    ts.isSuperCallExpression = isSuperCallExpression;
+    function isPrologueDirective(node) {
+        return node.kind === 202 && node.expression.kind === 9;
+    }
+    ts.isPrologueDirective = isPrologueDirective;
+    function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
+        return ts.getLeadingCommentRanges(sourceFileOfNode.text, node.pos);
+    }
+    ts.getLeadingCommentRangesOfNode = getLeadingCommentRangesOfNode;
+    function getLeadingCommentRangesOfNodeFromText(node, text) {
+        return ts.getLeadingCommentRanges(text, node.pos);
+    }
+    ts.getLeadingCommentRangesOfNodeFromText = getLeadingCommentRangesOfNodeFromText;
+    function getJsDocComments(node, sourceFileOfNode) {
+        return getJsDocCommentsFromText(node, sourceFileOfNode.text);
+    }
+    ts.getJsDocComments = getJsDocComments;
+    function getJsDocCommentsFromText(node, text) {
+        var commentRanges = (node.kind === 142 ||
+            node.kind === 141 ||
+            node.kind === 179 ||
+            node.kind === 180) ?
+            ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
+            getLeadingCommentRangesOfNodeFromText(node, text);
+        return ts.filter(commentRanges, isJsDocComment);
+        function isJsDocComment(comment) {
+            return text.charCodeAt(comment.pos + 1) === 42 &&
+                text.charCodeAt(comment.pos + 2) === 42 &&
+                text.charCodeAt(comment.pos + 3) !== 47;
+        }
+    }
+    ts.getJsDocCommentsFromText = getJsDocCommentsFromText;
+    ts.fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
+    ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx = /^(\/\/\/\s*<reference\s+types\s*=\s*)('|")(.+?)\2.*?\/>/;
+    ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
+    function isTypeNode(node) {
+        if (154 <= node.kind && node.kind <= 166) {
+            return true;
+        }
+        switch (node.kind) {
+            case 117:
+            case 130:
+            case 132:
+            case 120:
+            case 133:
+            case 135:
+            case 127:
+                return true;
+            case 103:
+                return node.parent.kind !== 183;
+            case 194:
+                return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
+            case 69:
+                if (node.parent.kind === 139 && node.parent.right === node) {
+                    node = node.parent;
+                }
+                else if (node.parent.kind === 172 && node.parent.name === node) {
+                    node = node.parent;
+                }
+                ts.Debug.assert(node.kind === 69 || node.kind === 139 || node.kind === 172, "'node' was expected to be a qualified name, identifier or property access in 'isTypeNode'.");
+            case 139:
+            case 172:
+            case 97:
+                var parent_1 = node.parent;
+                if (parent_1.kind === 158) {
+                    return false;
+                }
+                if (154 <= parent_1.kind && parent_1.kind <= 166) {
+                    return true;
+                }
+                switch (parent_1.kind) {
+                    case 194:
+                        return !isExpressionWithTypeArgumentsInClassExtendsClause(parent_1);
+                    case 141:
+                        return node === parent_1.constraint;
+                    case 145:
+                    case 144:
+                    case 142:
+                    case 218:
+                        return node === parent_1.type;
+                    case 220:
+                    case 179:
+                    case 180:
+                    case 148:
+                    case 147:
+                    case 146:
+                    case 149:
+                    case 150:
+                        return node === parent_1.type;
+                    case 151:
+                    case 152:
+                    case 153:
+                        return node === parent_1.type;
+                    case 177:
+                        return node === parent_1.type;
+                    case 174:
+                    case 175:
+                        return parent_1.typeArguments && ts.indexOf(parent_1.typeArguments, node) >= 0;
+                    case 176:
+                        return false;
+                }
+        }
+        return false;
+    }
+    ts.isTypeNode = isTypeNode;
+    function forEachReturnStatement(body, visitor) {
+        return traverse(body);
+        function traverse(node) {
+            switch (node.kind) {
+                case 211:
+                    return visitor(node);
+                case 227:
+                case 199:
+                case 203:
+                case 204:
+                case 205:
+                case 206:
+                case 207:
+                case 208:
+                case 212:
+                case 213:
+                case 249:
+                case 250:
+                case 214:
+                case 216:
+                case 252:
+                    return ts.forEachChild(node, traverse);
+            }
+        }
+    }
+    ts.forEachReturnStatement = forEachReturnStatement;
+    function forEachYieldExpression(body, visitor) {
+        return traverse(body);
+        function traverse(node) {
+            switch (node.kind) {
+                case 190:
+                    visitor(node);
+                    var operand = node.expression;
+                    if (operand) {
+                        traverse(operand);
+                    }
+                case 224:
+                case 222:
+                case 225:
+                case 223:
+                case 221:
+                case 192:
+                    return;
+                default:
+                    if (isFunctionLike(node)) {
+                        var name_5 = node.name;
+                        if (name_5 && name_5.kind === 140) {
+                            traverse(name_5.expression);
+                            return;
+                        }
+                    }
+                    else if (!isTypeNode(node)) {
+                        ts.forEachChild(node, traverse);
+                    }
+            }
+        }
+    }
+    ts.forEachYieldExpression = forEachYieldExpression;
+    function isVariableLike(node) {
+        if (node) {
+            switch (node.kind) {
+                case 169:
+                case 255:
+                case 142:
+                case 253:
+                case 145:
+                case 144:
+                case 254:
+                case 218:
+                    return true;
+            }
+        }
+        return false;
+    }
+    ts.isVariableLike = isVariableLike;
+    function isAccessor(node) {
+        return node && (node.kind === 149 || node.kind === 150);
+    }
+    ts.isAccessor = isAccessor;
+    function isClassLike(node) {
+        return node && (node.kind === 221 || node.kind === 192);
+    }
+    ts.isClassLike = isClassLike;
+    function isFunctionLike(node) {
+        return node && isFunctionLikeKind(node.kind);
+    }
+    ts.isFunctionLike = isFunctionLike;
+    function isFunctionLikeKind(kind) {
+        switch (kind) {
+            case 148:
+            case 179:
+            case 220:
+            case 180:
+            case 147:
+            case 146:
+            case 149:
+            case 150:
+            case 151:
+            case 152:
+            case 153:
+            case 156:
+            case 157:
+                return true;
+        }
+    }
+    ts.isFunctionLikeKind = isFunctionLikeKind;
+    function introducesArgumentsExoticObject(node) {
+        switch (node.kind) {
+            case 147:
+            case 146:
+            case 148:
+            case 149:
+            case 150:
+            case 220:
+            case 179:
+                return true;
+        }
+        return false;
+    }
+    ts.introducesArgumentsExoticObject = introducesArgumentsExoticObject;
+    function isIterationStatement(node, lookInLabeledStatements) {
+        switch (node.kind) {
+            case 206:
+            case 207:
+            case 208:
+            case 204:
+            case 205:
+                return true;
+            case 214:
+                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
+        }
+        return false;
+    }
+    ts.isIterationStatement = isIterationStatement;
+    function isFunctionBlock(node) {
+        return node && node.kind === 199 && isFunctionLike(node.parent);
+    }
+    ts.isFunctionBlock = isFunctionBlock;
+    function isObjectLiteralMethod(node) {
+        return node && node.kind === 147 && node.parent.kind === 171;
+    }
+    ts.isObjectLiteralMethod = isObjectLiteralMethod;
+    function isIdentifierTypePredicate(predicate) {
+        return predicate && predicate.kind === 1;
+    }
+    ts.isIdentifierTypePredicate = isIdentifierTypePredicate;
+    function isThisTypePredicate(predicate) {
+        return predicate && predicate.kind === 0;
+    }
+    ts.isThisTypePredicate = isThisTypePredicate;
+    function getContainingFunction(node) {
+        while (true) {
+            node = node.parent;
+            if (!node || isFunctionLike(node)) {
+                return node;
+            }
+        }
+    }
+    ts.getContainingFunction = getContainingFunction;
+    function getContainingClass(node) {
+        while (true) {
+            node = node.parent;
+            if (!node || isClassLike(node)) {
+                return node;
+            }
+        }
+    }
+    ts.getContainingClass = getContainingClass;
+    function getThisContainer(node, includeArrowFunctions) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return undefined;
+            }
+            switch (node.kind) {
+                case 140:
+                    if (isClassLike(node.parent.parent)) {
+                        return node;
+                    }
+                    node = node.parent;
+                    break;
+                case 143:
+                    if (node.parent.kind === 142 && isClassElement(node.parent.parent)) {
+                        node = node.parent.parent;
+                    }
+                    else if (isClassElement(node.parent)) {
+                        node = node.parent;
+                    }
+                    break;
+                case 180:
+                    if (!includeArrowFunctions) {
+                        continue;
+                    }
+                case 220:
+                case 179:
+                case 225:
+                case 145:
+                case 144:
+                case 147:
+                case 146:
+                case 148:
+                case 149:
+                case 150:
+                case 151:
+                case 152:
+                case 153:
+                case 224:
+                case 256:
+                    return node;
+            }
+        }
+    }
+    ts.getThisContainer = getThisContainer;
+    function getSuperContainer(node, stopOnFunctions) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return node;
+            }
+            switch (node.kind) {
+                case 140:
+                    node = node.parent;
+                    break;
+                case 220:
+                case 179:
+                case 180:
+                    if (!stopOnFunctions) {
+                        continue;
+                    }
+                case 145:
+                case 144:
+                case 147:
+                case 146:
+                case 148:
+                case 149:
+                case 150:
+                    return node;
+                case 143:
+                    if (node.parent.kind === 142 && isClassElement(node.parent.parent)) {
+                        node = node.parent.parent;
+                    }
+                    else if (isClassElement(node.parent)) {
+                        node = node.parent;
+                    }
+                    break;
+            }
+        }
+    }
+    ts.getSuperContainer = getSuperContainer;
+    function getImmediatelyInvokedFunctionExpression(func) {
+        if (func.kind === 179 || func.kind === 180) {
+            var prev = func;
+            var parent_2 = func.parent;
+            while (parent_2.kind === 178) {
+                prev = parent_2;
+                parent_2 = parent_2.parent;
+            }
+            if (parent_2.kind === 174 && parent_2.expression === prev) {
+                return parent_2;
+            }
+        }
+    }
+    ts.getImmediatelyInvokedFunctionExpression = getImmediatelyInvokedFunctionExpression;
+    function isSuperPropertyOrElementAccess(node) {
+        return (node.kind === 172
+            || node.kind === 173)
+            && node.expression.kind === 95;
+    }
+    ts.isSuperPropertyOrElementAccess = isSuperPropertyOrElementAccess;
+    function getEntityNameFromTypeNode(node) {
+        if (node) {
+            switch (node.kind) {
+                case 155:
+                    return node.typeName;
+                case 194:
+                    return node.expression;
+                case 69:
+                case 139:
+                    return node;
+            }
+        }
+        return undefined;
+    }
+    ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
+    function getInvokedExpression(node) {
+        if (node.kind === 176) {
+            return node.tag;
+        }
+        return node.expression;
+    }
+    ts.getInvokedExpression = getInvokedExpression;
+    function nodeCanBeDecorated(node) {
+        switch (node.kind) {
+            case 221:
+                return true;
+            case 145:
+                return node.parent.kind === 221;
+            case 149:
+            case 150:
+            case 147:
+                return node.body !== undefined
+                    && node.parent.kind === 221;
+            case 142:
+                return node.parent.body !== undefined
+                    && (node.parent.kind === 148
+                        || node.parent.kind === 147
+                        || node.parent.kind === 150)
+                    && node.parent.parent.kind === 221;
+        }
+        return false;
+    }
+    ts.nodeCanBeDecorated = nodeCanBeDecorated;
+    function nodeIsDecorated(node) {
+        return node.decorators !== undefined
+            && nodeCanBeDecorated(node);
+    }
+    ts.nodeIsDecorated = nodeIsDecorated;
+    function isPropertyAccessExpression(node) {
+        return node.kind === 172;
+    }
+    ts.isPropertyAccessExpression = isPropertyAccessExpression;
+    function isElementAccessExpression(node) {
+        return node.kind === 173;
+    }
+    ts.isElementAccessExpression = isElementAccessExpression;
+    function isJSXTagName(node) {
+        var parent = node.parent;
+        if (parent.kind === 243 ||
+            parent.kind === 242 ||
+            parent.kind === 245) {
+            return parent.tagName === node;
+        }
+        return false;
+    }
+    ts.isJSXTagName = isJSXTagName;
+    function isExpression(node) {
+        switch (node.kind) {
+            case 97:
+            case 95:
+            case 93:
+            case 99:
+            case 84:
+            case 10:
+            case 170:
+            case 171:
+            case 172:
+            case 173:
+            case 174:
+            case 175:
+            case 176:
+            case 195:
+            case 177:
+            case 196:
+            case 178:
+            case 179:
+            case 192:
+            case 180:
+            case 183:
+            case 181:
+            case 182:
+            case 185:
+            case 186:
+            case 187:
+            case 188:
+            case 191:
+            case 189:
+            case 11:
+            case 193:
+            case 241:
+            case 242:
+            case 190:
+            case 184:
+                return true;
+            case 139:
+                while (node.parent.kind === 139) {
+                    node = node.parent;
+                }
+                return node.parent.kind === 158 || isJSXTagName(node);
+            case 69:
+                if (node.parent.kind === 158 || isJSXTagName(node)) {
+                    return true;
+                }
+            case 8:
+            case 9:
+            case 97:
+                var parent_3 = node.parent;
+                switch (parent_3.kind) {
+                    case 218:
+                    case 142:
+                    case 145:
+                    case 144:
+                    case 255:
+                    case 253:
+                    case 169:
+                        return parent_3.initializer === node;
+                    case 202:
+                    case 203:
+                    case 204:
+                    case 205:
+                    case 211:
+                    case 212:
+                    case 213:
+                    case 249:
+                    case 215:
+                    case 213:
+                        return parent_3.expression === node;
+                    case 206:
+                        var forStatement = parent_3;
+                        return (forStatement.initializer === node && forStatement.initializer.kind !== 219) ||
+                            forStatement.condition === node ||
+                            forStatement.incrementor === node;
+                    case 207:
+                    case 208:
+                        var forInStatement = parent_3;
+                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 219) ||
+                            forInStatement.expression === node;
+                    case 177:
+                    case 195:
+                        return node === parent_3.expression;
+                    case 197:
+                        return node === parent_3.expression;
+                    case 140:
+                        return node === parent_3.expression;
+                    case 143:
+                    case 248:
+                    case 247:
+                        return true;
+                    case 194:
+                        return parent_3.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent_3);
+                    default:
+                        if (isExpression(parent_3)) {
+                            return true;
+                        }
+                }
+        }
+        return false;
+    }
+    ts.isExpression = isExpression;
+    function isExternalModuleNameRelative(moduleName) {
+        return moduleName.substr(0, 2) === "./" || moduleName.substr(0, 3) === "../" || moduleName.substr(0, 2) === ".\\" || moduleName.substr(0, 3) === "..\\";
+    }
+    ts.isExternalModuleNameRelative = isExternalModuleNameRelative;
+    function isInstantiatedModule(node, preserveConstEnums) {
+        var moduleState = ts.getModuleInstanceState(node);
+        return moduleState === 1 ||
+            (preserveConstEnums && moduleState === 2);
+    }
+    ts.isInstantiatedModule = isInstantiatedModule;
+    function isExternalModuleImportEqualsDeclaration(node) {
+        return node.kind === 229 && node.moduleReference.kind === 240;
+    }
+    ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
+    function getExternalModuleImportEqualsDeclarationExpression(node) {
+        ts.Debug.assert(isExternalModuleImportEqualsDeclaration(node));
+        return node.moduleReference.expression;
+    }
+    ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
+    function isInternalModuleImportEqualsDeclaration(node) {
+        return node.kind === 229 && node.moduleReference.kind !== 240;
+    }
+    ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
+    function isSourceFileJavaScript(file) {
+        return isInJavaScriptFile(file);
+    }
+    ts.isSourceFileJavaScript = isSourceFileJavaScript;
+    function isInJavaScriptFile(node) {
+        return node && !!(node.flags & 134217728);
+    }
+    ts.isInJavaScriptFile = isInJavaScriptFile;
+    function isRequireCall(expression, checkArgumentIsStringLiteral) {
+        var isRequire = expression.kind === 174 &&
+            expression.expression.kind === 69 &&
+            expression.expression.text === "require" &&
+            expression.arguments.length === 1;
+        return isRequire && (!checkArgumentIsStringLiteral || expression.arguments[0].kind === 9);
+    }
+    ts.isRequireCall = isRequireCall;
+    function isSingleOrDoubleQuote(charCode) {
+        return charCode === 39 || charCode === 34;
+    }
+    ts.isSingleOrDoubleQuote = isSingleOrDoubleQuote;
+    function getSpecialPropertyAssignmentKind(expression) {
+        if (!isInJavaScriptFile(expression)) {
+            return 0;
+        }
+        if (expression.kind !== 187) {
+            return 0;
+        }
+        var expr = expression;
+        if (expr.operatorToken.kind !== 56 || expr.left.kind !== 172) {
+            return 0;
+        }
+        var lhs = expr.left;
+        if (lhs.expression.kind === 69) {
+            var lhsId = lhs.expression;
+            if (lhsId.text === "exports") {
+                return 1;
+            }
+            else if (lhsId.text === "module" && lhs.name.text === "exports") {
+                return 2;
+            }
+        }
+        else if (lhs.expression.kind === 97) {
+            return 4;
+        }
+        else if (lhs.expression.kind === 172) {
+            var innerPropertyAccess = lhs.expression;
+            if (innerPropertyAccess.expression.kind === 69) {
+                var innerPropertyAccessIdentifier = innerPropertyAccess.expression;
+                if (innerPropertyAccessIdentifier.text === "module" && innerPropertyAccess.name.text === "exports") {
+                    return 1;
+                }
+                if (innerPropertyAccess.name.text === "prototype") {
+                    return 3;
+                }
+            }
+        }
+        return 0;
+    }
+    ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
+    function getExternalModuleName(node) {
+        if (node.kind === 230) {
+            return node.moduleSpecifier;
+        }
+        if (node.kind === 229) {
+            var reference = node.moduleReference;
+            if (reference.kind === 240) {
+                return reference.expression;
+            }
+        }
+        if (node.kind === 236) {
+            return node.moduleSpecifier;
+        }
+        if (node.kind === 225 && node.name.kind === 9) {
+            return node.name;
+        }
+    }
+    ts.getExternalModuleName = getExternalModuleName;
+    function hasQuestionToken(node) {
+        if (node) {
+            switch (node.kind) {
+                case 142:
+                case 147:
+                case 146:
+                case 254:
+                case 253:
+                case 145:
+                case 144:
+                    return node.questionToken !== undefined;
+            }
+        }
+        return false;
+    }
+    ts.hasQuestionToken = hasQuestionToken;
+    function isJSDocConstructSignature(node) {
+        return node.kind === 269 &&
+            node.parameters.length > 0 &&
+            node.parameters[0].type.kind === 271;
+    }
+    ts.isJSDocConstructSignature = isJSDocConstructSignature;
+    function getJSDocTag(node, kind, checkParentVariableStatement) {
+        if (!node) {
+            return undefined;
+        }
+        var jsDocComments = getJSDocComments(node, checkParentVariableStatement);
+        if (!jsDocComments) {
+            return undefined;
+        }
+        for (var _i = 0, jsDocComments_1 = jsDocComments; _i < jsDocComments_1.length; _i++) {
+            var jsDocComment = jsDocComments_1[_i];
+            for (var _a = 0, _b = jsDocComment.tags; _a < _b.length; _a++) {
+                var tag = _b[_a];
+                if (tag.kind === kind) {
+                    return tag;
+                }
+            }
+        }
+    }
+    function getJSDocComments(node, checkParentVariableStatement) {
+        if (node.jsDocComments) {
+            return node.jsDocComments;
+        }
+        if (checkParentVariableStatement) {
+            var isInitializerOfVariableDeclarationInStatement = node.parent.kind === 218 &&
+                node.parent.initializer === node &&
+                node.parent.parent.parent.kind === 200;
+            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent : undefined;
+            if (variableStatementNode) {
+                return variableStatementNode.jsDocComments;
+            }
+            var parent_4 = node.parent;
+            var isSourceOfAssignmentExpressionStatement = parent_4 && parent_4.parent &&
+                parent_4.kind === 187 &&
+                parent_4.operatorToken.kind === 56 &&
+                parent_4.parent.kind === 202;
+            if (isSourceOfAssignmentExpressionStatement) {
+                return parent_4.parent.jsDocComments;
+            }
+            var isPropertyAssignmentExpression = parent_4 && parent_4.kind === 253;
+            if (isPropertyAssignmentExpression) {
+                return parent_4.jsDocComments;
+            }
+        }
+        return undefined;
+    }
+    function getJSDocTypeTag(node) {
+        return getJSDocTag(node, 277, false);
+    }
+    ts.getJSDocTypeTag = getJSDocTypeTag;
+    function getJSDocReturnTag(node) {
+        return getJSDocTag(node, 276, true);
+    }
+    ts.getJSDocReturnTag = getJSDocReturnTag;
+    function getJSDocTemplateTag(node) {
+        return getJSDocTag(node, 278, false);
+    }
+    ts.getJSDocTemplateTag = getJSDocTemplateTag;
+    function getCorrespondingJSDocParameterTag(parameter) {
+        if (parameter.name && parameter.name.kind === 69) {
+            var parameterName = parameter.name.text;
+            var jsDocComments = getJSDocComments(parameter.parent, true);
+            if (jsDocComments) {
+                for (var _i = 0, jsDocComments_2 = jsDocComments; _i < jsDocComments_2.length; _i++) {
+                    var jsDocComment = jsDocComments_2[_i];
+                    for (var _a = 0, _b = jsDocComment.tags; _a < _b.length; _a++) {
+                        var tag = _b[_a];
+                        if (tag.kind === 275) {
+                            var parameterTag = tag;
+                            var name_6 = parameterTag.preParameterName || parameterTag.postParameterName;
+                            if (name_6.text === parameterName) {
+                                return parameterTag;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getCorrespondingJSDocParameterTag = getCorrespondingJSDocParameterTag;
+    function hasRestParameter(s) {
+        return isRestParameter(ts.lastOrUndefined(s.parameters));
+    }
+    ts.hasRestParameter = hasRestParameter;
+    function hasDeclaredRestParameter(s) {
+        return isDeclaredRestParam(ts.lastOrUndefined(s.parameters));
+    }
+    ts.hasDeclaredRestParameter = hasDeclaredRestParameter;
+    function isRestParameter(node) {
+        if (node && (node.flags & 134217728)) {
+            if (node.type && node.type.kind === 270) {
+                return true;
+            }
+            var paramTag = getCorrespondingJSDocParameterTag(node);
+            if (paramTag && paramTag.typeExpression) {
+                return paramTag.typeExpression.type.kind === 270;
+            }
+        }
+        return isDeclaredRestParam(node);
+    }
+    ts.isRestParameter = isRestParameter;
+    function isDeclaredRestParam(node) {
+        return node && node.dotDotDotToken !== undefined;
+    }
+    ts.isDeclaredRestParam = isDeclaredRestParam;
+    function isLiteralKind(kind) {
+        return 8 <= kind && kind <= 11;
+    }
+    ts.isLiteralKind = isLiteralKind;
+    function isTextualLiteralKind(kind) {
+        return kind === 9 || kind === 11;
+    }
+    ts.isTextualLiteralKind = isTextualLiteralKind;
+    function isTemplateLiteralKind(kind) {
+        return 11 <= kind && kind <= 14;
+    }
+    ts.isTemplateLiteralKind = isTemplateLiteralKind;
+    function isBindingPattern(node) {
+        return !!node && (node.kind === 168 || node.kind === 167);
+    }
+    ts.isBindingPattern = isBindingPattern;
+    function isAssignmentTarget(node) {
+        while (node.parent.kind === 178) {
+            node = node.parent;
+        }
+        while (true) {
+            var parent_5 = node.parent;
+            if (parent_5.kind === 170 || parent_5.kind === 191) {
+                node = parent_5;
+                continue;
+            }
+            if (parent_5.kind === 253 || parent_5.kind === 254) {
+                node = parent_5.parent;
+                continue;
+            }
+            return parent_5.kind === 187 &&
+                parent_5.operatorToken.kind === 56 &&
+                parent_5.left === node ||
+                (parent_5.kind === 207 || parent_5.kind === 208) &&
+                    parent_5.initializer === node;
+        }
+    }
+    ts.isAssignmentTarget = isAssignmentTarget;
+    function isNodeDescendentOf(node, ancestor) {
+        while (node) {
+            if (node === ancestor)
+                return true;
+            node = node.parent;
+        }
+        return false;
+    }
+    ts.isNodeDescendentOf = isNodeDescendentOf;
+    function isInAmbientContext(node) {
+        while (node) {
+            if (node.flags & 2 || (node.kind === 256 && node.isDeclarationFile)) {
+                return true;
+            }
+            node = node.parent;
+        }
+        return false;
+    }
+    ts.isInAmbientContext = isInAmbientContext;
+    function isDeclaration(node) {
+        switch (node.kind) {
+            case 180:
+            case 169:
+            case 221:
+            case 192:
+            case 148:
+            case 224:
+            case 255:
+            case 238:
+            case 220:
+            case 179:
+            case 149:
+            case 231:
+            case 229:
+            case 234:
+            case 222:
+            case 147:
+            case 146:
+            case 225:
+            case 232:
+            case 142:
+            case 253:
+            case 145:
+            case 144:
+            case 150:
+            case 254:
+            case 223:
+            case 141:
+            case 218:
+            case 279:
+                return true;
+        }
+        return false;
+    }
+    ts.isDeclaration = isDeclaration;
+    function isStatement(n) {
+        switch (n.kind) {
+            case 210:
+            case 209:
+            case 217:
+            case 204:
+            case 202:
+            case 201:
+            case 207:
+            case 208:
+            case 206:
+            case 203:
+            case 214:
+            case 211:
+            case 213:
+            case 215:
+            case 216:
+            case 200:
+            case 205:
+            case 212:
+            case 235:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isStatement = isStatement;
+    function isClassElement(n) {
+        switch (n.kind) {
+            case 148:
+            case 145:
+            case 147:
+            case 149:
+            case 150:
+            case 146:
+            case 153:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isClassElement = isClassElement;
+    function isDeclarationName(name) {
+        if (name.kind !== 69 && name.kind !== 9 && name.kind !== 8) {
+            return false;
+        }
+        var parent = name.parent;
+        if (parent.kind === 234 || parent.kind === 238) {
+            if (parent.propertyName) {
+                return true;
+            }
+        }
+        if (isDeclaration(parent)) {
+            return parent.name === name;
+        }
+        return false;
+    }
+    ts.isDeclarationName = isDeclarationName;
+    function isLiteralComputedPropertyDeclarationName(node) {
+        return (node.kind === 9 || node.kind === 8) &&
+            node.parent.kind === 140 &&
+            isDeclaration(node.parent.parent);
+    }
+    ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
+    function isIdentifierName(node) {
+        var parent = node.parent;
+        switch (parent.kind) {
+            case 145:
+            case 144:
+            case 147:
+            case 146:
+            case 149:
+            case 150:
+            case 255:
+            case 253:
+            case 172:
+                return parent.name === node;
+            case 139:
+                if (parent.right === node) {
+                    while (parent.kind === 139) {
+                        parent = parent.parent;
+                    }
+                    return parent.kind === 158;
+                }
+                return false;
+            case 169:
+            case 234:
+                return parent.propertyName === node;
+            case 238:
+                return true;
+        }
+        return false;
+    }
+    ts.isIdentifierName = isIdentifierName;
+    function isAliasSymbolDeclaration(node) {
+        return node.kind === 229 ||
+            node.kind === 228 ||
+            node.kind === 231 && !!node.name ||
+            node.kind === 232 ||
+            node.kind === 234 ||
+            node.kind === 238 ||
+            node.kind === 235 && node.expression.kind === 69;
+    }
+    ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
+    function getClassExtendsHeritageClauseElement(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 83);
+        return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
+    }
+    ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
+    function getClassImplementsHeritageClauseElements(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 106);
+        return heritageClause ? heritageClause.types : undefined;
+    }
+    ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
+    function getInterfaceBaseTypeNodes(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 83);
+        return heritageClause ? heritageClause.types : undefined;
+    }
+    ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
+    function getHeritageClause(clauses, kind) {
+        if (clauses) {
+            for (var _i = 0, clauses_1 = clauses; _i < clauses_1.length; _i++) {
+                var clause = clauses_1[_i];
+                if (clause.token === kind) {
+                    return clause;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getHeritageClause = getHeritageClause;
+    function tryResolveScriptReference(host, sourceFile, reference) {
+        if (!host.getCompilerOptions().noResolve) {
+            var referenceFileName = ts.isRootedDiskPath(reference.fileName) ? reference.fileName : ts.combinePaths(ts.getDirectoryPath(sourceFile.fileName), reference.fileName);
+            return host.getSourceFile(referenceFileName);
+        }
+    }
+    ts.tryResolveScriptReference = tryResolveScriptReference;
+    function getAncestor(node, kind) {
+        while (node) {
+            if (node.kind === kind) {
+                return node;
+            }
+            node = node.parent;
+        }
+        return undefined;
+    }
+    ts.getAncestor = getAncestor;
+    function getFileReferenceFromReferencePath(comment, commentRange) {
+        var simpleReferenceRegEx = /^\/\/\/\s*<reference\s+/gim;
+        var isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
+        if (simpleReferenceRegEx.test(comment)) {
+            if (isNoDefaultLibRegEx.test(comment)) {
+                return {
+                    isNoDefaultLib: true
+                };
+            }
+            else {
+                var refMatchResult = ts.fullTripleSlashReferencePathRegEx.exec(comment);
+                var refLibResult = !refMatchResult && ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx.exec(comment);
+                if (refMatchResult || refLibResult) {
+                    var start = commentRange.pos;
+                    var end = commentRange.end;
+                    return {
+                        fileReference: {
+                            pos: start,
+                            end: end,
+                            fileName: (refMatchResult || refLibResult)[3]
+                        },
+                        isNoDefaultLib: false,
+                        isTypeReferenceDirective: !!refLibResult
+                    };
+                }
+                return {
+                    diagnosticMessage: ts.Diagnostics.Invalid_reference_directive_syntax,
+                    isNoDefaultLib: false
+                };
+            }
+        }
+        return undefined;
+    }
+    ts.getFileReferenceFromReferencePath = getFileReferenceFromReferencePath;
+    function isKeyword(token) {
+        return 70 <= token && token <= 138;
+    }
+    ts.isKeyword = isKeyword;
+    function isTrivia(token) {
+        return 2 <= token && token <= 7;
+    }
+    ts.isTrivia = isTrivia;
+    function isAsyncFunctionLike(node) {
+        return isFunctionLike(node) && (node.flags & 256) !== 0 && !isAccessor(node);
+    }
+    ts.isAsyncFunctionLike = isAsyncFunctionLike;
+    function isStringOrNumericLiteral(kind) {
+        return kind === 9 || kind === 8;
+    }
+    ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
+    function hasDynamicName(declaration) {
+        return declaration.name && isDynamicName(declaration.name);
+    }
+    ts.hasDynamicName = hasDynamicName;
+    function isDynamicName(name) {
+        return name.kind === 140 &&
+            !isStringOrNumericLiteral(name.expression.kind) &&
+            !isWellKnownSymbolSyntactically(name.expression);
+    }
+    ts.isDynamicName = isDynamicName;
+    function isWellKnownSymbolSyntactically(node) {
+        return isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
+    }
+    ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
+    function getPropertyNameForPropertyNameNode(name) {
+        if (name.kind === 69 || name.kind === 9 || name.kind === 8 || name.kind === 142) {
+            return name.text;
+        }
+        if (name.kind === 140) {
+            var nameExpression = name.expression;
+            if (isWellKnownSymbolSyntactically(nameExpression)) {
+                var rightHandSideName = nameExpression.name.text;
+                return getPropertyNameForKnownSymbolName(rightHandSideName);
+            }
+            else if (nameExpression.kind === 9 || nameExpression.kind === 8) {
+                return nameExpression.text;
+            }
+        }
+        return undefined;
+    }
+    ts.getPropertyNameForPropertyNameNode = getPropertyNameForPropertyNameNode;
+    function getPropertyNameForKnownSymbolName(symbolName) {
+        return "__@" + symbolName;
+    }
+    ts.getPropertyNameForKnownSymbolName = getPropertyNameForKnownSymbolName;
+    function isESSymbolIdentifier(node) {
+        return node.kind === 69 && node.text === "Symbol";
+    }
+    ts.isESSymbolIdentifier = isESSymbolIdentifier;
+    function isModifierKind(token) {
+        switch (token) {
+            case 115:
+            case 118:
+            case 74:
+            case 122:
+            case 77:
+            case 82:
+            case 112:
+            case 110:
+            case 111:
+            case 128:
+            case 113:
+                return true;
+        }
+        return false;
+    }
+    ts.isModifierKind = isModifierKind;
+    function isParameterDeclaration(node) {
+        var root = getRootDeclaration(node);
+        return root.kind === 142;
+    }
+    ts.isParameterDeclaration = isParameterDeclaration;
+    function getRootDeclaration(node) {
+        while (node.kind === 169) {
+            node = node.parent.parent;
+        }
+        return node;
+    }
+    ts.getRootDeclaration = getRootDeclaration;
+    function nodeStartsNewLexicalEnvironment(n) {
+        return isFunctionLike(n) || n.kind === 225 || n.kind === 256;
+    }
+    ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
+    function cloneNode(node, location, flags, parent) {
+        var clone = location !== undefined
+            ? ts.createNode(node.kind, location.pos, location.end)
+            : createSynthesizedNode(node.kind);
+        for (var key in node) {
+            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
+                continue;
+            }
+            clone[key] = node[key];
+        }
+        if (flags !== undefined) {
+            clone.flags = flags;
+        }
+        if (parent !== undefined) {
+            clone.parent = parent;
+        }
+        return clone;
+    }
+    ts.cloneNode = cloneNode;
+    function cloneEntityName(node, parent) {
+        var clone = cloneNode(node, node, node.flags, parent);
+        if (isQualifiedName(clone)) {
+            var left = clone.left, right = clone.right;
+            clone.left = cloneEntityName(left, clone);
+            clone.right = cloneNode(right, right, right.flags, parent);
+        }
+        return clone;
+    }
+    ts.cloneEntityName = cloneEntityName;
+    function isQualifiedName(node) {
+        return node.kind === 139;
+    }
+    ts.isQualifiedName = isQualifiedName;
+    function nodeIsSynthesized(node) {
+        return node.pos === -1;
+    }
+    ts.nodeIsSynthesized = nodeIsSynthesized;
+    function createSynthesizedNode(kind, startsOnNewLine) {
+        var node = ts.createNode(kind, -1, -1);
+        node.startsOnNewLine = startsOnNewLine;
+        return node;
+    }
+    ts.createSynthesizedNode = createSynthesizedNode;
+    function createSynthesizedNodeArray() {
+        var array = [];
+        array.pos = -1;
+        array.end = -1;
+        return array;
+    }
+    ts.createSynthesizedNodeArray = createSynthesizedNodeArray;
+    function createDiagnosticCollection() {
+        var nonFileDiagnostics = [];
+        var fileDiagnostics = {};
+        var diagnosticsModified = false;
+        var modificationCount = 0;
+        return {
+            add: add,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getDiagnostics: getDiagnostics,
+            getModificationCount: getModificationCount,
+            reattachFileDiagnostics: reattachFileDiagnostics
+        };
+        function getModificationCount() {
+            return modificationCount;
+        }
+        function reattachFileDiagnostics(newFile) {
+            if (!ts.hasProperty(fileDiagnostics, newFile.fileName)) {
+                return;
+            }
+            for (var _i = 0, _a = fileDiagnostics[newFile.fileName]; _i < _a.length; _i++) {
+                var diagnostic = _a[_i];
+                diagnostic.file = newFile;
+            }
+        }
+        function add(diagnostic) {
+            var diagnostics;
+            if (diagnostic.file) {
+                diagnostics = fileDiagnostics[diagnostic.file.fileName];
+                if (!diagnostics) {
+                    diagnostics = [];
+                    fileDiagnostics[diagnostic.file.fileName] = diagnostics;
+                }
+            }
+            else {
+                diagnostics = nonFileDiagnostics;
+            }
+            diagnostics.push(diagnostic);
+            diagnosticsModified = true;
+            modificationCount++;
+        }
+        function getGlobalDiagnostics() {
+            sortAndDeduplicate();
+            return nonFileDiagnostics;
+        }
+        function getDiagnostics(fileName) {
+            sortAndDeduplicate();
+            if (fileName) {
+                return fileDiagnostics[fileName] || [];
+            }
+            var allDiagnostics = [];
+            function pushDiagnostic(d) {
+                allDiagnostics.push(d);
+            }
+            ts.forEach(nonFileDiagnostics, pushDiagnostic);
+            for (var key in fileDiagnostics) {
+                if (ts.hasProperty(fileDiagnostics, key)) {
+                    ts.forEach(fileDiagnostics[key], pushDiagnostic);
+                }
+            }
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function sortAndDeduplicate() {
+            if (!diagnosticsModified) {
+                return;
+            }
+            diagnosticsModified = false;
+            nonFileDiagnostics = ts.sortAndDeduplicateDiagnostics(nonFileDiagnostics);
+            for (var key in fileDiagnostics) {
+                if (ts.hasProperty(fileDiagnostics, key)) {
+                    fileDiagnostics[key] = ts.sortAndDeduplicateDiagnostics(fileDiagnostics[key]);
+                }
+            }
+        }
+    }
+    ts.createDiagnosticCollection = createDiagnosticCollection;
+    var escapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
+    var escapedCharsMap = {
+        "\0": "\\0",
+        "\t": "\\t",
+        "\v": "\\v",
+        "\f": "\\f",
+        "\b": "\\b",
+        "\r": "\\r",
+        "\n": "\\n",
+        "\\": "\\\\",
+        "\"": "\\\"",
+        "\u2028": "\\u2028",
+        "\u2029": "\\u2029",
+        "\u0085": "\\u0085"
+    };
+    function escapeString(s) {
+        s = escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, getReplacement) : s;
+        return s;
+        function getReplacement(c) {
+            return escapedCharsMap[c] || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
+        }
+    }
+    ts.escapeString = escapeString;
+    function isIntrinsicJsxName(name) {
+        var ch = name.substr(0, 1);
+        return ch.toLowerCase() === ch;
+    }
+    ts.isIntrinsicJsxName = isIntrinsicJsxName;
+    function get16BitUnicodeEscapeSequence(charCode) {
+        var hexCharCode = charCode.toString(16).toUpperCase();
+        var paddedHexCode = ("0000" + hexCharCode).slice(-4);
+        return "\\u" + paddedHexCode;
+    }
+    var nonAsciiCharacters = /[^\u0000-\u007F]/g;
+    function escapeNonAsciiCharacters(s) {
+        return nonAsciiCharacters.test(s) ?
+            s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
+            s;
+    }
+    ts.escapeNonAsciiCharacters = escapeNonAsciiCharacters;
+    var indentStrings = ["", "    "];
+    function getIndentString(level) {
+        if (indentStrings[level] === undefined) {
+            indentStrings[level] = getIndentString(level - 1) + indentStrings[1];
+        }
+        return indentStrings[level];
+    }
+    ts.getIndentString = getIndentString;
+    function getIndentSize() {
+        return indentStrings[1].length;
+    }
+    ts.getIndentSize = getIndentSize;
+    function createTextWriter(newLine) {
+        var output;
+        var indent;
+        var lineStart;
+        var lineCount;
+        var linePos;
+        function write(s) {
+            if (s && s.length) {
+                if (lineStart) {
+                    output += getIndentString(indent);
+                    lineStart = false;
+                }
+                output += s;
+            }
+        }
+        function reset() {
+            output = "";
+            indent = 0;
+            lineStart = true;
+            lineCount = 0;
+            linePos = 0;
+        }
+        function rawWrite(s) {
+            if (s !== undefined) {
+                if (lineStart) {
+                    lineStart = false;
+                }
+                output += s;
+            }
+        }
+        function writeLiteral(s) {
+            if (s && s.length) {
+                write(s);
+                var lineStartsOfS = ts.computeLineStarts(s);
+                if (lineStartsOfS.length > 1) {
+                    lineCount = lineCount + lineStartsOfS.length - 1;
+                    linePos = output.length - s.length + ts.lastOrUndefined(lineStartsOfS);
+                }
+            }
+        }
+        function writeLine() {
+            if (!lineStart) {
+                output += newLine;
+                lineCount++;
+                linePos = output.length;
+                lineStart = true;
+            }
+        }
+        function writeTextOfNode(text, node) {
+            write(getTextOfNodeFromSourceText(text, node));
+        }
+        reset();
+        return {
+            write: write,
+            rawWrite: rawWrite,
+            writeTextOfNode: writeTextOfNode,
+            writeLiteral: writeLiteral,
+            writeLine: writeLine,
+            increaseIndent: function () { indent++; },
+            decreaseIndent: function () { indent--; },
+            getIndent: function () { return indent; },
+            getTextPos: function () { return output.length; },
+            getLine: function () { return lineCount + 1; },
+            getColumn: function () { return lineStart ? indent * getIndentSize() + 1 : output.length - linePos + 1; },
+            getText: function () { return output; },
+            reset: reset
+        };
+    }
+    ts.createTextWriter = createTextWriter;
+    function getExternalModuleNameFromPath(host, fileName) {
+        var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
+        var dir = ts.toPath(host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
+        var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
+        var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, false);
+        return ts.removeFileExtension(relativePath);
+    }
+    ts.getExternalModuleNameFromPath = getExternalModuleNameFromPath;
+    function getOwnEmitOutputFilePath(sourceFile, host, extension) {
+        var compilerOptions = host.getCompilerOptions();
+        var emitOutputFilePathWithoutExtension;
+        if (compilerOptions.outDir) {
+            emitOutputFilePathWithoutExtension = ts.removeFileExtension(getSourceFilePathInNewDir(sourceFile, host, compilerOptions.outDir));
+        }
+        else {
+            emitOutputFilePathWithoutExtension = ts.removeFileExtension(sourceFile.fileName);
+        }
+        return emitOutputFilePathWithoutExtension + extension;
+    }
+    ts.getOwnEmitOutputFilePath = getOwnEmitOutputFilePath;
+    function getDeclarationEmitOutputFilePath(sourceFile, host) {
+        var options = host.getCompilerOptions();
+        var outputDir = options.declarationDir || options.outDir;
+        if (options.declaration) {
+            var path = outputDir
+                ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
+                : sourceFile.fileName;
+            return ts.removeFileExtension(path) + ".d.ts";
+        }
+    }
+    ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
+    function getEmitScriptTarget(compilerOptions) {
+        return compilerOptions.target || 0;
+    }
+    ts.getEmitScriptTarget = getEmitScriptTarget;
+    function getEmitModuleKind(compilerOptions) {
+        return typeof compilerOptions.module === "number" ?
+            compilerOptions.module :
+            getEmitScriptTarget(compilerOptions) === 2 ? ts.ModuleKind.ES6 : ts.ModuleKind.CommonJS;
+    }
+    ts.getEmitModuleKind = getEmitModuleKind;
+    function forEachExpectedEmitFile(host, action, targetSourceFile) {
+        var options = host.getCompilerOptions();
+        if (options.outFile || options.out) {
+            onBundledEmit(host);
+        }
+        else {
+            var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
+            for (var _i = 0, sourceFiles_1 = sourceFiles; _i < sourceFiles_1.length; _i++) {
+                var sourceFile = sourceFiles_1[_i];
+                if (!isDeclarationFile(sourceFile)) {
+                    onSingleFileEmit(host, sourceFile);
+                }
+            }
+        }
+        function onSingleFileEmit(host, sourceFile) {
+            var extension = ".js";
+            if (options.jsx === 1) {
+                if (isSourceFileJavaScript(sourceFile)) {
+                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
+                        extension = ".jsx";
+                    }
+                }
+                else if (sourceFile.languageVariant === 1) {
+                    extension = ".jsx";
+                }
+            }
+            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
+            var emitFileNames = {
+                jsFilePath: jsFilePath,
+                sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
+                declarationFilePath: !isSourceFileJavaScript(sourceFile) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined
+            };
+            action(emitFileNames, [sourceFile], false);
+        }
+        function onBundledEmit(host) {
+            var bundledSources = ts.filter(host.getSourceFiles(), function (sourceFile) {
+                return !isDeclarationFile(sourceFile)
+                    && (!ts.isExternalModule(sourceFile) || !!getEmitModuleKind(options));
+            });
+            if (bundledSources.length) {
+                var jsFilePath = options.outFile || options.out;
+                var emitFileNames = {
+                    jsFilePath: jsFilePath,
+                    sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
+                    declarationFilePath: options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined
+                };
+                action(emitFileNames, bundledSources, true);
+            }
+        }
+        function getSourceMapFilePath(jsFilePath, options) {
+            return options.sourceMap ? jsFilePath + ".map" : undefined;
+        }
+    }
+    ts.forEachExpectedEmitFile = forEachExpectedEmitFile;
+    function getSourceFilePathInNewDir(sourceFile, host, newDirPath) {
+        var sourceFilePath = ts.getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
+        sourceFilePath = sourceFilePath.replace(host.getCommonSourceDirectory(), "");
+        return ts.combinePaths(newDirPath, sourceFilePath);
+    }
+    ts.getSourceFilePathInNewDir = getSourceFilePathInNewDir;
+    function writeFile(host, diagnostics, fileName, data, writeByteOrderMark, sourceFiles) {
+        host.writeFile(fileName, data, writeByteOrderMark, function (hostErrorMessage) {
+            diagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Could_not_write_file_0_Colon_1, fileName, hostErrorMessage));
+        }, sourceFiles);
+    }
+    ts.writeFile = writeFile;
+    function getLineOfLocalPosition(currentSourceFile, pos) {
+        return ts.getLineAndCharacterOfPosition(currentSourceFile, pos).line;
+    }
+    ts.getLineOfLocalPosition = getLineOfLocalPosition;
+    function getLineOfLocalPositionFromLineMap(lineMap, pos) {
+        return ts.computeLineAndCharacterOfPosition(lineMap, pos).line;
+    }
+    ts.getLineOfLocalPositionFromLineMap = getLineOfLocalPositionFromLineMap;
+    function getFirstConstructorWithBody(node) {
+        return ts.forEach(node.members, function (member) {
+            if (member.kind === 148 && nodeIsPresent(member.body)) {
+                return member;
+            }
+        });
+    }
+    ts.getFirstConstructorWithBody = getFirstConstructorWithBody;
+    function getSetAccessorTypeAnnotationNode(accessor) {
+        if (accessor && accessor.parameters.length > 0) {
+            var hasThis = accessor.parameters.length === 2 &&
+                accessor.parameters[0].name.kind === 69 &&
+                accessor.parameters[0].name.originalKeywordKind === 97;
+            return accessor.parameters[hasThis ? 1 : 0].type;
+        }
+    }
+    ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
+    function getAllAccessorDeclarations(declarations, accessor) {
+        var firstAccessor;
+        var secondAccessor;
+        var getAccessor;
+        var setAccessor;
+        if (hasDynamicName(accessor)) {
+            firstAccessor = accessor;
+            if (accessor.kind === 149) {
+                getAccessor = accessor;
+            }
+            else if (accessor.kind === 150) {
+                setAccessor = accessor;
+            }
+            else {
+                ts.Debug.fail("Accessor has wrong kind");
+            }
+        }
+        else {
+            ts.forEach(declarations, function (member) {
+                if ((member.kind === 149 || member.kind === 150)
+                    && (member.flags & 32) === (accessor.flags & 32)) {
+                    var memberName = getPropertyNameForPropertyNameNode(member.name);
+                    var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
+                    if (memberName === accessorName) {
+                        if (!firstAccessor) {
+                            firstAccessor = member;
+                        }
+                        else if (!secondAccessor) {
+                            secondAccessor = member;
+                        }
+                        if (member.kind === 149 && !getAccessor) {
+                            getAccessor = member;
+                        }
+                        if (member.kind === 150 && !setAccessor) {
+                            setAccessor = member;
+                        }
+                    }
+                }
+            });
+        }
+        return {
+            firstAccessor: firstAccessor,
+            secondAccessor: secondAccessor,
+            getAccessor: getAccessor,
+            setAccessor: setAccessor
+        };
+    }
+    ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
+    function emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments) {
+        if (leadingComments && leadingComments.length && node.pos !== leadingComments[0].pos &&
+            getLineOfLocalPositionFromLineMap(lineMap, node.pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
+            writer.writeLine();
+        }
+    }
+    ts.emitNewLineBeforeLeadingComments = emitNewLineBeforeLeadingComments;
+    function emitComments(text, lineMap, writer, comments, trailingSeparator, newLine, writeComment) {
+        var emitLeadingSpace = !trailingSeparator;
+        ts.forEach(comments, function (comment) {
+            if (emitLeadingSpace) {
+                writer.write(" ");
+                emitLeadingSpace = false;
+            }
+            writeComment(text, lineMap, writer, comment, newLine);
+            if (comment.hasTrailingNewLine) {
+                writer.writeLine();
+            }
+            else if (trailingSeparator) {
+                writer.write(" ");
+            }
+            else {
+                emitLeadingSpace = true;
+            }
+        });
+    }
+    ts.emitComments = emitComments;
+    function emitDetachedComments(text, lineMap, writer, writeComment, node, newLine, removeComments) {
+        var leadingComments;
+        var currentDetachedCommentInfo;
+        if (removeComments) {
+            if (node.pos === 0) {
+                leadingComments = ts.filter(ts.getLeadingCommentRanges(text, node.pos), isPinnedComment);
+            }
+        }
+        else {
+            leadingComments = ts.getLeadingCommentRanges(text, node.pos);
+        }
+        if (leadingComments) {
+            var detachedComments = [];
+            var lastComment = void 0;
+            for (var _i = 0, leadingComments_1 = leadingComments; _i < leadingComments_1.length; _i++) {
+                var comment = leadingComments_1[_i];
+                if (lastComment) {
+                    var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, lastComment.end);
+                    var commentLine = getLineOfLocalPositionFromLineMap(lineMap, comment.pos);
+                    if (commentLine >= lastCommentLine + 2) {
+                        break;
+                    }
+                }
+                detachedComments.push(comment);
+                lastComment = comment;
+            }
+            if (detachedComments.length) {
+                var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, ts.lastOrUndefined(detachedComments).end);
+                var nodeLine = getLineOfLocalPositionFromLineMap(lineMap, ts.skipTrivia(text, node.pos));
+                if (nodeLine >= lastCommentLine + 2) {
+                    emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments);
+                    emitComments(text, lineMap, writer, detachedComments, true, newLine, writeComment);
+                    currentDetachedCommentInfo = { nodePos: node.pos, detachedCommentEndPos: ts.lastOrUndefined(detachedComments).end };
+                }
+            }
+        }
+        return currentDetachedCommentInfo;
+        function isPinnedComment(comment) {
+            return text.charCodeAt(comment.pos + 1) === 42 &&
+                text.charCodeAt(comment.pos + 2) === 33;
+        }
+    }
+    ts.emitDetachedComments = emitDetachedComments;
+    function writeCommentRange(text, lineMap, writer, comment, newLine) {
+        if (text.charCodeAt(comment.pos + 1) === 42) {
+            var firstCommentLineAndCharacter = ts.computeLineAndCharacterOfPosition(lineMap, comment.pos);
+            var lineCount = lineMap.length;
+            var firstCommentLineIndent = void 0;
+            for (var pos = comment.pos, currentLine = firstCommentLineAndCharacter.line; pos < comment.end; currentLine++) {
+                var nextLineStart = (currentLine + 1) === lineCount
+                    ? text.length + 1
+                    : lineMap[currentLine + 1];
+                if (pos !== comment.pos) {
+                    if (firstCommentLineIndent === undefined) {
+                        firstCommentLineIndent = calculateIndent(text, lineMap[firstCommentLineAndCharacter.line], comment.pos);
+                    }
+                    var currentWriterIndentSpacing = writer.getIndent() * getIndentSize();
+                    var spacesToEmit = currentWriterIndentSpacing - firstCommentLineIndent + calculateIndent(text, pos, nextLineStart);
+                    if (spacesToEmit > 0) {
+                        var numberOfSingleSpacesToEmit = spacesToEmit % getIndentSize();
+                        var indentSizeSpaceString = getIndentString((spacesToEmit - numberOfSingleSpacesToEmit) / getIndentSize());
+                        writer.rawWrite(indentSizeSpaceString);
+                        while (numberOfSingleSpacesToEmit) {
+                            writer.rawWrite(" ");
+                            numberOfSingleSpacesToEmit--;
+                        }
+                    }
+                    else {
+                        writer.rawWrite("");
+                    }
+                }
+                writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart);
+                pos = nextLineStart;
+            }
+        }
+        else {
+            writer.write(text.substring(comment.pos, comment.end));
+        }
+    }
+    ts.writeCommentRange = writeCommentRange;
+    function writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart) {
+        var end = Math.min(comment.end, nextLineStart - 1);
+        var currentLineText = text.substring(pos, end).replace(/^\s+|\s+$/g, "");
+        if (currentLineText) {
+            writer.write(currentLineText);
+            if (end !== comment.end) {
+                writer.writeLine();
+            }
+        }
+        else {
+            writer.writeLiteral(newLine);
+        }
+    }
+    function calculateIndent(text, pos, end) {
+        var currentLineIndent = 0;
+        for (; pos < end && ts.isWhiteSpace(text.charCodeAt(pos)); pos++) {
+            if (text.charCodeAt(pos) === 9) {
+                currentLineIndent += getIndentSize() - (currentLineIndent % getIndentSize());
+            }
+            else {
+                currentLineIndent++;
+            }
+        }
+        return currentLineIndent;
+    }
+    function modifierToFlag(token) {
+        switch (token) {
+            case 113: return 32;
+            case 112: return 4;
+            case 111: return 16;
+            case 110: return 8;
+            case 115: return 128;
+            case 82: return 1;
+            case 122: return 2;
+            case 74: return 2048;
+            case 77: return 512;
+            case 118: return 256;
+            case 128: return 64;
+        }
+        return 0;
+    }
+    ts.modifierToFlag = modifierToFlag;
+    function isLeftHandSideExpression(expr) {
+        if (expr) {
+            switch (expr.kind) {
+                case 172:
+                case 173:
+                case 175:
+                case 174:
+                case 196:
+                case 241:
+                case 242:
+                case 176:
+                case 170:
+                case 178:
+                case 171:
+                case 192:
+                case 179:
+                case 69:
+                case 10:
+                case 8:
+                case 9:
+                case 11:
+                case 189:
+                case 84:
+                case 93:
+                case 97:
+                case 99:
+                case 95:
+                    return true;
+            }
+        }
+        return false;
+    }
+    ts.isLeftHandSideExpression = isLeftHandSideExpression;
+    function isAssignmentOperator(token) {
+        return token >= 56 && token <= 68;
+    }
+    ts.isAssignmentOperator = isAssignmentOperator;
+    function isExpressionWithTypeArgumentsInClassExtendsClause(node) {
+        return node.kind === 194 &&
+            node.parent.token === 83 &&
+            isClassLike(node.parent.parent);
+    }
+    ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
+    function isSupportedExpressionWithTypeArguments(node) {
+        return isSupportedExpressionWithTypeArgumentsRest(node.expression);
+    }
+    ts.isSupportedExpressionWithTypeArguments = isSupportedExpressionWithTypeArguments;
+    function isSupportedExpressionWithTypeArgumentsRest(node) {
+        if (node.kind === 69) {
+            return true;
+        }
+        else if (isPropertyAccessExpression(node)) {
+            return isSupportedExpressionWithTypeArgumentsRest(node.expression);
+        }
+        else {
+            return false;
+        }
+    }
+    function isRightSideOfQualifiedNameOrPropertyAccess(node) {
+        return (node.parent.kind === 139 && node.parent.right === node) ||
+            (node.parent.kind === 172 && node.parent.name === node);
+    }
+    ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
+    function isEmptyObjectLiteralOrArrayLiteral(expression) {
+        var kind = expression.kind;
+        if (kind === 171) {
+            return expression.properties.length === 0;
+        }
+        if (kind === 170) {
+            return expression.elements.length === 0;
+        }
+        return false;
+    }
+    ts.isEmptyObjectLiteralOrArrayLiteral = isEmptyObjectLiteralOrArrayLiteral;
+    function getLocalSymbolForExportDefault(symbol) {
+        return symbol && symbol.valueDeclaration && (symbol.valueDeclaration.flags & 512) ? symbol.valueDeclaration.localSymbol : undefined;
+    }
+    ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
+    function hasJavaScriptFileExtension(fileName) {
+        return ts.forEach(ts.supportedJavascriptExtensions, function (extension) { return ts.fileExtensionIs(fileName, extension); });
+    }
+    ts.hasJavaScriptFileExtension = hasJavaScriptFileExtension;
+    function getExpandedCharCodes(input) {
+        var output = [];
+        var length = input.length;
+        for (var i = 0; i < length; i++) {
+            var charCode = input.charCodeAt(i);
+            if (charCode < 0x80) {
+                output.push(charCode);
+            }
+            else if (charCode < 0x800) {
+                output.push((charCode >> 6) | 192);
+                output.push((charCode & 63) | 128);
+            }
+            else if (charCode < 0x10000) {
+                output.push((charCode >> 12) | 224);
+                output.push(((charCode >> 6) & 63) | 128);
+                output.push((charCode & 63) | 128);
+            }
+            else if (charCode < 0x20000) {
+                output.push((charCode >> 18) | 240);
+                output.push(((charCode >> 12) & 63) | 128);
+                output.push(((charCode >> 6) & 63) | 128);
+                output.push((charCode & 63) | 128);
+            }
+            else {
+                ts.Debug.assert(false, "Unexpected code point");
+            }
+        }
+        return output;
+    }
+    ts.stringify = typeof JSON !== "undefined" && JSON.stringify
+        ? JSON.stringify
+        : stringifyFallback;
+    function stringifyFallback(value) {
+        return value === undefined ? undefined : stringifyValue(value);
+    }
+    function stringifyValue(value) {
+        return typeof value === "string" ? "\"" + escapeString(value) + "\""
+            : typeof value === "number" ? isFinite(value) ? String(value) : "null"
+                : typeof value === "boolean" ? value ? "true" : "false"
+                    : typeof value === "object" && value ? ts.isArray(value) ? cycleCheck(stringifyArray, value) : cycleCheck(stringifyObject, value)
+                        : "null";
+    }
+    function cycleCheck(cb, value) {
+        ts.Debug.assert(!value.hasOwnProperty("__cycle"), "Converting circular structure to JSON");
+        value.__cycle = true;
+        var result = cb(value);
+        delete value.__cycle;
+        return result;
+    }
+    function stringifyArray(value) {
+        return "[" + ts.reduceLeft(value, stringifyElement, "") + "]";
+    }
+    function stringifyElement(memo, value) {
+        return (memo ? memo + "," : memo) + stringifyValue(value);
+    }
+    function stringifyObject(value) {
+        return "{" + ts.reduceProperties(value, stringifyProperty, "") + "}";
+    }
+    function stringifyProperty(memo, value, key) {
+        return value === undefined || typeof value === "function" || key === "__cycle" ? memo
+            : (memo ? memo + "," : memo) + ("\"" + escapeString(key) + "\":" + stringifyValue(value));
+    }
+    var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+    function convertToBase64(input) {
+        var result = "";
+        var charCodes = getExpandedCharCodes(input);
+        var i = 0;
+        var length = charCodes.length;
+        var byte1, byte2, byte3, byte4;
+        while (i < length) {
+            byte1 = charCodes[i] >> 2;
+            byte2 = (charCodes[i] & 3) << 4 | charCodes[i + 1] >> 4;
+            byte3 = (charCodes[i + 1] & 15) << 2 | charCodes[i + 2] >> 6;
+            byte4 = charCodes[i + 2] & 63;
+            if (i + 1 >= length) {
+                byte3 = byte4 = 64;
+            }
+            else if (i + 2 >= length) {
+                byte4 = 64;
+            }
+            result += base64Digits.charAt(byte1) + base64Digits.charAt(byte2) + base64Digits.charAt(byte3) + base64Digits.charAt(byte4);
+            i += 3;
+        }
+        return result;
+    }
+    ts.convertToBase64 = convertToBase64;
+    function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
+        return !ts.isRootedDiskPath(absoluteOrRelativePath)
+            ? absoluteOrRelativePath
+            : ts.getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, false);
+    }
+    ts.convertToRelativePath = convertToRelativePath;
+    var carriageReturnLineFeed = "\r\n";
+    var lineFeed = "\n";
+    function getNewLineCharacter(options) {
+        if (options.newLine === 0) {
+            return carriageReturnLineFeed;
+        }
+        else if (options.newLine === 1) {
+            return lineFeed;
+        }
+        else if (ts.sys) {
+            return ts.sys.newLine;
+        }
+        return carriageReturnLineFeed;
+    }
+    ts.getNewLineCharacter = getNewLineCharacter;
+    function isWatchSet(options) {
+        return options.watch && options.hasOwnProperty("watch");
+    }
+    ts.isWatchSet = isWatchSet;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getDefaultLibFileName(options) {
+        return options.target === 2 ? "lib.es6.d.ts" : "lib.d.ts";
+    }
+    ts.getDefaultLibFileName = getDefaultLibFileName;
+    function textSpanEnd(span) {
+        return span.start + span.length;
+    }
+    ts.textSpanEnd = textSpanEnd;
+    function textSpanIsEmpty(span) {
+        return span.length === 0;
+    }
+    ts.textSpanIsEmpty = textSpanIsEmpty;
+    function textSpanContainsPosition(span, position) {
+        return position >= span.start && position < textSpanEnd(span);
+    }
+    ts.textSpanContainsPosition = textSpanContainsPosition;
+    function textSpanContainsTextSpan(span, other) {
+        return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
+    }
+    ts.textSpanContainsTextSpan = textSpanContainsTextSpan;
+    function textSpanOverlapsWith(span, other) {
+        var overlapStart = Math.max(span.start, other.start);
+        var overlapEnd = Math.min(textSpanEnd(span), textSpanEnd(other));
+        return overlapStart < overlapEnd;
+    }
+    ts.textSpanOverlapsWith = textSpanOverlapsWith;
+    function textSpanOverlap(span1, span2) {
+        var overlapStart = Math.max(span1.start, span2.start);
+        var overlapEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
+        if (overlapStart < overlapEnd) {
+            return createTextSpanFromBounds(overlapStart, overlapEnd);
+        }
+        return undefined;
+    }
+    ts.textSpanOverlap = textSpanOverlap;
+    function textSpanIntersectsWithTextSpan(span, other) {
+        return other.start <= textSpanEnd(span) && textSpanEnd(other) >= span.start;
+    }
+    ts.textSpanIntersectsWithTextSpan = textSpanIntersectsWithTextSpan;
+    function textSpanIntersectsWith(span, start, length) {
+        var end = start + length;
+        return start <= textSpanEnd(span) && end >= span.start;
+    }
+    ts.textSpanIntersectsWith = textSpanIntersectsWith;
+    function decodedTextSpanIntersectsWith(start1, length1, start2, length2) {
+        var end1 = start1 + length1;
+        var end2 = start2 + length2;
+        return start2 <= end1 && end2 >= start1;
+    }
+    ts.decodedTextSpanIntersectsWith = decodedTextSpanIntersectsWith;
+    function textSpanIntersectsWithPosition(span, position) {
+        return position <= textSpanEnd(span) && position >= span.start;
+    }
+    ts.textSpanIntersectsWithPosition = textSpanIntersectsWithPosition;
+    function textSpanIntersection(span1, span2) {
+        var intersectStart = Math.max(span1.start, span2.start);
+        var intersectEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
+        if (intersectStart <= intersectEnd) {
+            return createTextSpanFromBounds(intersectStart, intersectEnd);
+        }
+        return undefined;
+    }
+    ts.textSpanIntersection = textSpanIntersection;
+    function createTextSpan(start, length) {
+        if (start < 0) {
+            throw new Error("start < 0");
+        }
+        if (length < 0) {
+            throw new Error("length < 0");
+        }
+        return { start: start, length: length };
+    }
+    ts.createTextSpan = createTextSpan;
+    function createTextSpanFromBounds(start, end) {
+        return createTextSpan(start, end - start);
+    }
+    ts.createTextSpanFromBounds = createTextSpanFromBounds;
+    function textChangeRangeNewSpan(range) {
+        return createTextSpan(range.span.start, range.newLength);
+    }
+    ts.textChangeRangeNewSpan = textChangeRangeNewSpan;
+    function textChangeRangeIsUnchanged(range) {
+        return textSpanIsEmpty(range.span) && range.newLength === 0;
+    }
+    ts.textChangeRangeIsUnchanged = textChangeRangeIsUnchanged;
+    function createTextChangeRange(span, newLength) {
+        if (newLength < 0) {
+            throw new Error("newLength < 0");
+        }
+        return { span: span, newLength: newLength };
+    }
+    ts.createTextChangeRange = createTextChangeRange;
+    ts.unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
+    function collapseTextChangeRangesAcrossMultipleVersions(changes) {
+        if (changes.length === 0) {
+            return ts.unchangedTextChangeRange;
+        }
+        if (changes.length === 1) {
+            return changes[0];
+        }
+        var change0 = changes[0];
+        var oldStartN = change0.span.start;
+        var oldEndN = textSpanEnd(change0.span);
+        var newEndN = oldStartN + change0.newLength;
+        for (var i = 1; i < changes.length; i++) {
+            var nextChange = changes[i];
+            var oldStart1 = oldStartN;
+            var oldEnd1 = oldEndN;
+            var newEnd1 = newEndN;
+            var oldStart2 = nextChange.span.start;
+            var oldEnd2 = textSpanEnd(nextChange.span);
+            var newEnd2 = oldStart2 + nextChange.newLength;
+            oldStartN = Math.min(oldStart1, oldStart2);
+            oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
+            newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
+        }
+        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), newEndN - oldStartN);
+    }
+    ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
+    function getTypeParameterOwner(d) {
+        if (d && d.kind === 141) {
+            for (var current = d; current; current = current.parent) {
+                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 222) {
+                    return current;
+                }
+            }
+        }
+    }
+    ts.getTypeParameterOwner = getTypeParameterOwner;
+    function isParameterPropertyDeclaration(node) {
+        return node.flags & 92 && node.parent.kind === 148 && ts.isClassLike(node.parent.parent);
+    }
+    ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
+    function startsWith(str, prefix) {
+        return str.lastIndexOf(prefix, 0) === 0;
+    }
+    ts.startsWith = startsWith;
+    function endsWith(str, suffix) {
+        var expectedPos = str.length - suffix.length;
+        return str.indexOf(suffix, expectedPos) === expectedPos;
+    }
+    ts.endsWith = endsWith;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.parseTime = 0;
+    var NodeConstructor;
+    var SourceFileConstructor;
+    function createNode(kind, pos, end) {
+        if (kind === 256) {
+            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
+        }
+        else {
+            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
+        }
+    }
+    ts.createNode = createNode;
+    function visitNode(cbNode, node) {
+        if (node) {
+            return cbNode(node);
+        }
+    }
+    function visitNodeArray(cbNodes, nodes) {
+        if (nodes) {
+            return cbNodes(nodes);
+        }
+    }
+    function visitEachNode(cbNode, nodes) {
+        if (nodes) {
+            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
+                var node = nodes_1[_i];
+                var result = cbNode(node);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+    }
+    function forEachChild(node, cbNode, cbNodeArray) {
+        if (!node) {
+            return;
+        }
+        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
+        var cbNodes = cbNodeArray || cbNode;
+        switch (node.kind) {
+            case 139:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.right);
+            case 141:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.constraint) ||
+                    visitNode(cbNode, node.expression);
+            case 254:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.equalsToken) ||
+                    visitNode(cbNode, node.objectAssignmentInitializer);
+            case 142:
+            case 145:
+            case 144:
+            case 253:
+            case 218:
+            case 169:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.dotDotDotToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.initializer);
+            case 156:
+            case 157:
+            case 151:
+            case 152:
+            case 153:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 147:
+            case 146:
+            case 148:
+            case 149:
+            case 150:
+            case 179:
+            case 220:
+            case 180:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.equalsGreaterThanToken) ||
+                    visitNode(cbNode, node.body);
+            case 155:
+                return visitNode(cbNode, node.typeName) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 154:
+                return visitNode(cbNode, node.parameterName) ||
+                    visitNode(cbNode, node.type);
+            case 158:
+                return visitNode(cbNode, node.exprName);
+            case 159:
+                return visitNodes(cbNodes, node.members);
+            case 160:
+                return visitNode(cbNode, node.elementType);
+            case 161:
+                return visitNodes(cbNodes, node.elementTypes);
+            case 162:
+            case 163:
+                return visitNodes(cbNodes, node.types);
+            case 164:
+                return visitNode(cbNode, node.type);
+            case 167:
+            case 168:
+                return visitNodes(cbNodes, node.elements);
+            case 170:
+                return visitNodes(cbNodes, node.elements);
+            case 171:
+                return visitNodes(cbNodes, node.properties);
+            case 172:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.dotToken) ||
+                    visitNode(cbNode, node.name);
+            case 173:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.argumentExpression);
+            case 174:
+            case 175:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments) ||
+                    visitNodes(cbNodes, node.arguments);
+            case 176:
+                return visitNode(cbNode, node.tag) ||
+                    visitNode(cbNode, node.template);
+            case 177:
+                return visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.expression);
+            case 178:
+                return visitNode(cbNode, node.expression);
+            case 181:
+                return visitNode(cbNode, node.expression);
+            case 182:
+                return visitNode(cbNode, node.expression);
+            case 183:
+                return visitNode(cbNode, node.expression);
+            case 185:
+                return visitNode(cbNode, node.operand);
+            case 190:
+                return visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.expression);
+            case 184:
+                return visitNode(cbNode, node.expression);
+            case 186:
+                return visitNode(cbNode, node.operand);
+            case 187:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.operatorToken) ||
+                    visitNode(cbNode, node.right);
+            case 195:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.type);
+            case 196:
+                return visitNode(cbNode, node.expression);
+            case 188:
+                return visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.whenTrue) ||
+                    visitNode(cbNode, node.colonToken) ||
+                    visitNode(cbNode, node.whenFalse);
+            case 191:
+                return visitNode(cbNode, node.expression);
+            case 199:
+            case 226:
+                return visitNodes(cbNodes, node.statements);
+            case 256:
+                return visitNodes(cbNodes, node.statements) ||
+                    visitNode(cbNode, node.endOfFileToken);
+            case 200:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.declarationList);
+            case 219:
+                return visitNodes(cbNodes, node.declarations);
+            case 202:
+                return visitNode(cbNode, node.expression);
+            case 203:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.thenStatement) ||
+                    visitNode(cbNode, node.elseStatement);
+            case 204:
+                return visitNode(cbNode, node.statement) ||
+                    visitNode(cbNode, node.expression);
+            case 205:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 206:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.incrementor) ||
+                    visitNode(cbNode, node.statement);
+            case 207:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 208:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 209:
+            case 210:
+                return visitNode(cbNode, node.label);
+            case 211:
+                return visitNode(cbNode, node.expression);
+            case 212:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 213:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.caseBlock);
+            case 227:
+                return visitNodes(cbNodes, node.clauses);
+            case 249:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.statements);
+            case 250:
+                return visitNodes(cbNodes, node.statements);
+            case 214:
+                return visitNode(cbNode, node.label) ||
+                    visitNode(cbNode, node.statement);
+            case 215:
+                return visitNode(cbNode, node.expression);
+            case 216:
+                return visitNode(cbNode, node.tryBlock) ||
+                    visitNode(cbNode, node.catchClause) ||
+                    visitNode(cbNode, node.finallyBlock);
+            case 252:
+                return visitNode(cbNode, node.variableDeclaration) ||
+                    visitNode(cbNode, node.block);
+            case 143:
+                return visitNode(cbNode, node.expression);
+            case 221:
+            case 192:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 222:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 223:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNode(cbNode, node.type);
+            case 224:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.members);
+            case 255:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 225:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.body);
+            case 229:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.moduleReference);
+            case 230:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.importClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 231:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.namedBindings);
+            case 228:
+                return visitNode(cbNode, node.name);
+            case 232:
+                return visitNode(cbNode, node.name);
+            case 233:
+            case 237:
+                return visitNodes(cbNodes, node.elements);
+            case 236:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.exportClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 234:
+            case 238:
+                return visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.name);
+            case 235:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.expression);
+            case 189:
+                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
+            case 197:
+                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
+            case 140:
+                return visitNode(cbNode, node.expression);
+            case 251:
+                return visitNodes(cbNodes, node.types);
+            case 194:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 240:
+                return visitNode(cbNode, node.expression);
+            case 239:
+                return visitNodes(cbNodes, node.decorators);
+            case 241:
+                return visitNode(cbNode, node.openingElement) ||
+                    visitNodes(cbNodes, node.children) ||
+                    visitNode(cbNode, node.closingElement);
+            case 242:
+            case 243:
+                return visitNode(cbNode, node.tagName) ||
+                    visitNodes(cbNodes, node.attributes);
+            case 246:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 247:
+                return visitNode(cbNode, node.expression);
+            case 248:
+                return visitNode(cbNode, node.expression);
+            case 245:
+                return visitNode(cbNode, node.tagName);
+            case 257:
+                return visitNode(cbNode, node.type);
+            case 261:
+                return visitNodes(cbNodes, node.types);
+            case 262:
+                return visitNodes(cbNodes, node.types);
+            case 260:
+                return visitNode(cbNode, node.elementType);
+            case 264:
+                return visitNode(cbNode, node.type);
+            case 263:
+                return visitNode(cbNode, node.type);
+            case 265:
+                return visitNodes(cbNodes, node.members);
+            case 267:
+                return visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 268:
+                return visitNode(cbNode, node.type);
+            case 269:
+                return visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 270:
+                return visitNode(cbNode, node.type);
+            case 271:
+                return visitNode(cbNode, node.type);
+            case 272:
+                return visitNode(cbNode, node.type);
+            case 266:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.type);
+            case 273:
+                return visitNodes(cbNodes, node.tags);
+            case 275:
+                return visitNode(cbNode, node.preParameterName) ||
+                    visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.postParameterName);
+            case 276:
+                return visitNode(cbNode, node.typeExpression);
+            case 277:
+                return visitNode(cbNode, node.typeExpression);
+            case 278:
+                return visitNodes(cbNodes, node.typeParameters);
+            case 279:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.jsDocTypeLiteral);
+            case 281:
+                return visitNodes(cbNodes, node.jsDocPropertyTags);
+            case 280:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.name);
+        }
+    }
+    ts.forEachChild = forEachChild;
+    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
+        if (setParentNodes === void 0) { setParentNodes = false; }
+        var start = new Date().getTime();
+        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, undefined, setParentNodes, scriptKind);
+        ts.parseTime += new Date().getTime() - start;
+        return result;
+    }
+    ts.createSourceFile = createSourceFile;
+    function isExternalModule(file) {
+        return file.externalModuleIndicator !== undefined;
+    }
+    ts.isExternalModule = isExternalModule;
+    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+        return IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
+    }
+    ts.updateSourceFile = updateSourceFile;
+    function parseIsolatedJSDocComment(content, start, length) {
+        var result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
+        if (result && result.jsDocComment) {
+            Parser.fixupParentReferences(result.jsDocComment);
+        }
+        return result;
+    }
+    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+    function parseJSDocTypeExpressionForTests(content, start, length) {
+        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
+    }
+    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+    var Parser;
+    (function (Parser) {
+        var scanner = ts.createScanner(2, true);
+        var disallowInAndDecoratorContext = 4194304 | 16777216;
+        var NodeConstructor;
+        var SourceFileConstructor;
+        var sourceFile;
+        var parseDiagnostics;
+        var syntaxCursor;
+        var token;
+        var sourceText;
+        var nodeCount;
+        var identifiers;
+        var identifierCount;
+        var parsingContext;
+        var contextFlags;
+        var parseErrorBeforeNextFinishedNode = false;
+        function parseSourceFile(fileName, _sourceText, languageVersion, _syntaxCursor, setParentNodes, scriptKind) {
+            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
+            initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind);
+            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
+            clearState();
+            return result;
+        }
+        Parser.parseSourceFile = parseSourceFile;
+        function getLanguageVariant(scriptKind) {
+            return scriptKind === 4 || scriptKind === 2 || scriptKind === 1 ? 1 : 0;
+        }
+        function initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind) {
+            NodeConstructor = ts.objectAllocator.getNodeConstructor();
+            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
+            sourceText = _sourceText;
+            syntaxCursor = _syntaxCursor;
+            parseDiagnostics = [];
+            parsingContext = 0;
+            identifiers = {};
+            identifierCount = 0;
+            nodeCount = 0;
+            contextFlags = scriptKind === 1 || scriptKind === 2 ? 134217728 : 0;
+            parseErrorBeforeNextFinishedNode = false;
+            scanner.setText(sourceText);
+            scanner.setOnError(scanError);
+            scanner.setScriptTarget(languageVersion);
+            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
+        }
+        function clearState() {
+            scanner.setText("");
+            scanner.setOnError(undefined);
+            parseDiagnostics = undefined;
+            sourceFile = undefined;
+            identifiers = undefined;
+            syntaxCursor = undefined;
+            sourceText = undefined;
+        }
+        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
+            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
+            sourceFile.flags = contextFlags;
+            token = nextToken();
+            processReferenceComments(sourceFile);
+            sourceFile.statements = parseList(0, parseStatement);
+            ts.Debug.assert(token === 1);
+            sourceFile.endOfFileToken = parseTokenNode();
+            setExternalModuleIndicator(sourceFile);
+            sourceFile.nodeCount = nodeCount;
+            sourceFile.identifierCount = identifierCount;
+            sourceFile.identifiers = identifiers;
+            sourceFile.parseDiagnostics = parseDiagnostics;
+            if (setParentNodes) {
+                fixupParentReferences(sourceFile);
+            }
+            return sourceFile;
+        }
+        function addJSDocComment(node) {
+            if (contextFlags & 134217728) {
+                var comments = ts.getLeadingCommentRangesOfNode(node, sourceFile);
+                if (comments) {
+                    for (var _i = 0, comments_1 = comments; _i < comments_1.length; _i++) {
+                        var comment = comments_1[_i];
+                        var jsDocComment = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
+                        if (!jsDocComment) {
+                            continue;
+                        }
+                        if (!node.jsDocComments) {
+                            node.jsDocComments = [];
+                        }
+                        node.jsDocComments.push(jsDocComment);
+                    }
+                }
+            }
+            return node;
+        }
+        function fixupParentReferences(rootNode) {
+            var parent = rootNode;
+            forEachChild(rootNode, visitNode);
+            return;
+            function visitNode(n) {
+                if (n.parent !== parent) {
+                    n.parent = parent;
+                    var saveParent = parent;
+                    parent = n;
+                    forEachChild(n, visitNode);
+                    if (n.jsDocComments) {
+                        for (var _i = 0, _a = n.jsDocComments; _i < _a.length; _i++) {
+                            var jsDocComment = _a[_i];
+                            jsDocComment.parent = n;
+                            parent = jsDocComment;
+                            forEachChild(jsDocComment, visitNode);
+                        }
+                    }
+                    parent = saveParent;
+                }
+            }
+        }
+        Parser.fixupParentReferences = fixupParentReferences;
+        function createSourceFile(fileName, languageVersion, scriptKind) {
+            var sourceFile = new SourceFileConstructor(256, 0, sourceText.length);
+            nodeCount++;
+            sourceFile.text = sourceText;
+            sourceFile.bindDiagnostics = [];
+            sourceFile.languageVersion = languageVersion;
+            sourceFile.fileName = ts.normalizePath(fileName);
+            sourceFile.languageVariant = getLanguageVariant(scriptKind);
+            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts");
+            sourceFile.scriptKind = scriptKind;
+            return sourceFile;
+        }
+        function setContextFlag(val, flag) {
+            if (val) {
+                contextFlags |= flag;
+            }
+            else {
+                contextFlags &= ~flag;
+            }
+        }
+        function setDisallowInContext(val) {
+            setContextFlag(val, 4194304);
+        }
+        function setYieldContext(val) {
+            setContextFlag(val, 8388608);
+        }
+        function setDecoratorContext(val) {
+            setContextFlag(val, 16777216);
+        }
+        function setAwaitContext(val) {
+            setContextFlag(val, 33554432);
+        }
+        function doOutsideOfContext(context, func) {
+            var contextFlagsToClear = context & contextFlags;
+            if (contextFlagsToClear) {
+                setContextFlag(false, contextFlagsToClear);
+                var result = func();
+                setContextFlag(true, contextFlagsToClear);
+                return result;
+            }
+            return func();
+        }
+        function doInsideOfContext(context, func) {
+            var contextFlagsToSet = context & ~contextFlags;
+            if (contextFlagsToSet) {
+                setContextFlag(true, contextFlagsToSet);
+                var result = func();
+                setContextFlag(false, contextFlagsToSet);
+                return result;
+            }
+            return func();
+        }
+        function allowInAnd(func) {
+            return doOutsideOfContext(4194304, func);
+        }
+        function disallowInAnd(func) {
+            return doInsideOfContext(4194304, func);
+        }
+        function doInYieldContext(func) {
+            return doInsideOfContext(8388608, func);
+        }
+        function doInDecoratorContext(func) {
+            return doInsideOfContext(16777216, func);
+        }
+        function doInAwaitContext(func) {
+            return doInsideOfContext(33554432, func);
+        }
+        function doOutsideOfAwaitContext(func) {
+            return doOutsideOfContext(33554432, func);
+        }
+        function doInYieldAndAwaitContext(func) {
+            return doInsideOfContext(8388608 | 33554432, func);
+        }
+        function inContext(flags) {
+            return (contextFlags & flags) !== 0;
+        }
+        function inYieldContext() {
+            return inContext(8388608);
+        }
+        function inDisallowInContext() {
+            return inContext(4194304);
+        }
+        function inDecoratorContext() {
+            return inContext(16777216);
+        }
+        function inAwaitContext() {
+            return inContext(33554432);
+        }
+        function parseErrorAtCurrentToken(message, arg0) {
+            var start = scanner.getTokenPos();
+            var length = scanner.getTextPos() - start;
+            parseErrorAtPosition(start, length, message, arg0);
+        }
+        function parseErrorAtPosition(start, length, message, arg0) {
+            var lastError = ts.lastOrUndefined(parseDiagnostics);
+            if (!lastError || start !== lastError.start) {
+                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
+            }
+            parseErrorBeforeNextFinishedNode = true;
+        }
+        function scanError(message, length) {
+            var pos = scanner.getTextPos();
+            parseErrorAtPosition(pos, length || 0, message);
+        }
+        function getNodePos() {
+            return scanner.getStartPos();
+        }
+        function getNodeEnd() {
+            return scanner.getStartPos();
+        }
+        function nextToken() {
+            return token = scanner.scan();
+        }
+        function reScanGreaterToken() {
+            return token = scanner.reScanGreaterToken();
+        }
+        function reScanSlashToken() {
+            return token = scanner.reScanSlashToken();
+        }
+        function reScanTemplateToken() {
+            return token = scanner.reScanTemplateToken();
+        }
+        function scanJsxIdentifier() {
+            return token = scanner.scanJsxIdentifier();
+        }
+        function scanJsxText() {
+            return token = scanner.scanJsxToken();
+        }
+        function speculationHelper(callback, isLookAhead) {
+            var saveToken = token;
+            var saveParseDiagnosticsLength = parseDiagnostics.length;
+            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+            var saveContextFlags = contextFlags;
+            var result = isLookAhead
+                ? scanner.lookAhead(callback)
+                : scanner.tryScan(callback);
+            ts.Debug.assert(saveContextFlags === contextFlags);
+            if (!result || isLookAhead) {
+                token = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+            }
+            return result;
+        }
+        function lookAhead(callback) {
+            return speculationHelper(callback, true);
+        }
+        function tryParse(callback) {
+            return speculationHelper(callback, false);
+        }
+        function isIdentifier() {
+            if (token === 69) {
+                return true;
+            }
+            if (token === 114 && inYieldContext()) {
+                return false;
+            }
+            if (token === 119 && inAwaitContext()) {
+                return false;
+            }
+            return token > 105;
+        }
+        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
+            if (shouldAdvance === void 0) { shouldAdvance = true; }
+            if (token === kind) {
+                if (shouldAdvance) {
+                    nextToken();
+                }
+                return true;
+            }
+            if (diagnosticMessage) {
+                parseErrorAtCurrentToken(diagnosticMessage);
+            }
+            else {
+                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
+            }
+            return false;
+        }
+        function parseOptional(t) {
+            if (token === t) {
+                nextToken();
+                return true;
+            }
+            return false;
+        }
+        function parseOptionalToken(t) {
+            if (token === t) {
+                return parseTokenNode();
+            }
+            return undefined;
+        }
+        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            return parseOptionalToken(t) ||
+                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
+        }
+        function parseTokenNode() {
+            var node = createNode(token);
+            nextToken();
+            return finishNode(node);
+        }
+        function canParseSemicolon() {
+            if (token === 23) {
+                return true;
+            }
+            return token === 16 || token === 1 || scanner.hasPrecedingLineBreak();
+        }
+        function parseSemicolon() {
+            if (canParseSemicolon()) {
+                if (token === 23) {
+                    nextToken();
+                }
+                return true;
+            }
+            else {
+                return parseExpected(23);
+            }
+        }
+        function createNode(kind, pos) {
+            nodeCount++;
+            if (!(pos >= 0)) {
+                pos = scanner.getStartPos();
+            }
+            return new NodeConstructor(kind, pos, pos);
+        }
+        function finishNode(node, end) {
+            node.end = end === undefined ? scanner.getStartPos() : end;
+            if (contextFlags) {
+                node.flags |= contextFlags;
+            }
+            if (parseErrorBeforeNextFinishedNode) {
+                parseErrorBeforeNextFinishedNode = false;
+                node.flags |= 67108864;
+            }
+            return node;
+        }
+        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            if (reportAtCurrentPosition) {
+                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
+            }
+            else {
+                parseErrorAtCurrentToken(diagnosticMessage, arg0);
+            }
+            var result = createNode(kind, scanner.getStartPos());
+            result.text = "";
+            return finishNode(result);
+        }
+        function internIdentifier(text) {
+            text = ts.escapeIdentifier(text);
+            return ts.hasProperty(identifiers, text) ? identifiers[text] : (identifiers[text] = text);
+        }
+        function createIdentifier(isIdentifier, diagnosticMessage) {
+            identifierCount++;
+            if (isIdentifier) {
+                var node = createNode(69);
+                if (token !== 69) {
+                    node.originalKeywordKind = token;
+                }
+                node.text = internIdentifier(scanner.getTokenValue());
+                nextToken();
+                return finishNode(node);
+            }
+            return createMissingNode(69, false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
+        }
+        function parseIdentifier(diagnosticMessage) {
+            return createIdentifier(isIdentifier(), diagnosticMessage);
+        }
+        function parseIdentifierName() {
+            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token));
+        }
+        function isLiteralPropertyName() {
+            return ts.tokenIsIdentifierOrKeyword(token) ||
+                token === 9 ||
+                token === 8;
+        }
+        function parsePropertyNameWorker(allowComputedPropertyNames) {
+            if (token === 9 || token === 8) {
+                return parseLiteralNode(true);
+            }
+            if (allowComputedPropertyNames && token === 19) {
+                return parseComputedPropertyName();
+            }
+            return parseIdentifierName();
+        }
+        function parsePropertyName() {
+            return parsePropertyNameWorker(true);
+        }
+        function parseSimplePropertyName() {
+            return parsePropertyNameWorker(false);
+        }
+        function isSimplePropertyName() {
+            return token === 9 || token === 8 || ts.tokenIsIdentifierOrKeyword(token);
+        }
+        function parseComputedPropertyName() {
+            var node = createNode(140);
+            parseExpected(19);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20);
+            return finishNode(node);
+        }
+        function parseContextualModifier(t) {
+            return token === t && tryParse(nextTokenCanFollowModifier);
+        }
+        function nextTokenIsOnSameLineAndCanFollowModifier() {
+            nextToken();
+            if (scanner.hasPrecedingLineBreak()) {
+                return false;
+            }
+            return canFollowModifier();
+        }
+        function nextTokenCanFollowModifier() {
+            if (token === 74) {
+                return nextToken() === 81;
+            }
+            if (token === 82) {
+                nextToken();
+                if (token === 77) {
+                    return lookAhead(nextTokenIsClassOrFunction);
+                }
+                return token !== 37 && token !== 116 && token !== 15 && canFollowModifier();
+            }
+            if (token === 77) {
+                return nextTokenIsClassOrFunction();
+            }
+            if (token === 113) {
+                nextToken();
+                return canFollowModifier();
+            }
+            return nextTokenIsOnSameLineAndCanFollowModifier();
+        }
+        function parseAnyContextualModifier() {
+            return ts.isModifierKind(token) && tryParse(nextTokenCanFollowModifier);
+        }
+        function canFollowModifier() {
+            return token === 19
+                || token === 15
+                || token === 37
+                || isLiteralPropertyName();
+        }
+        function nextTokenIsClassOrFunction() {
+            nextToken();
+            return token === 73 || token === 87;
+        }
+        function isListElement(parsingContext, inErrorRecovery) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return true;
+            }
+            switch (parsingContext) {
+                case 0:
+                case 1:
+                case 3:
+                    return !(token === 23 && inErrorRecovery) && isStartOfStatement();
+                case 2:
+                    return token === 71 || token === 77;
+                case 4:
+                    return lookAhead(isTypeMemberStart);
+                case 5:
+                    return lookAhead(isClassMemberStart) || (token === 23 && !inErrorRecovery);
+                case 6:
+                    return token === 19 || isLiteralPropertyName();
+                case 12:
+                    return token === 19 || token === 37 || isLiteralPropertyName();
+                case 9:
+                    return token === 19 || isLiteralPropertyName();
+                case 7:
+                    if (token === 15) {
+                        return lookAhead(isValidHeritageClauseObjectLiteral);
+                    }
+                    if (!inErrorRecovery) {
+                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    }
+                    else {
+                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    }
+                case 8:
+                    return isIdentifierOrPattern();
+                case 10:
+                    return token === 24 || token === 22 || isIdentifierOrPattern();
+                case 17:
+                    return isIdentifier();
+                case 11:
+                case 15:
+                    return token === 24 || token === 22 || isStartOfExpression();
+                case 16:
+                    return isStartOfParameter();
+                case 18:
+                case 19:
+                    return token === 24 || isStartOfType();
+                case 20:
+                    return isHeritageClause();
+                case 21:
+                    return ts.tokenIsIdentifierOrKeyword(token);
+                case 13:
+                    return ts.tokenIsIdentifierOrKeyword(token) || token === 15;
+                case 14:
+                    return true;
+                case 22:
+                case 23:
+                case 25:
+                    return JSDocParser.isJSDocType();
+                case 24:
+                    return isSimplePropertyName();
+            }
+            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
+        }
+        function isValidHeritageClauseObjectLiteral() {
+            ts.Debug.assert(token === 15);
+            if (nextToken() === 16) {
+                var next = nextToken();
+                return next === 24 || next === 15 || next === 83 || next === 106;
+            }
+            return true;
+        }
+        function nextTokenIsIdentifier() {
+            nextToken();
+            return isIdentifier();
+        }
+        function nextTokenIsIdentifierOrKeyword() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token);
+        }
+        function isHeritageClauseExtendsOrImplementsKeyword() {
+            if (token === 106 ||
+                token === 83) {
+                return lookAhead(nextTokenIsStartOfExpression);
+            }
+            return false;
+        }
+        function nextTokenIsStartOfExpression() {
+            nextToken();
+            return isStartOfExpression();
+        }
+        function isListTerminator(kind) {
+            if (token === 1) {
+                return true;
+            }
+            switch (kind) {
+                case 1:
+                case 2:
+                case 4:
+                case 5:
+                case 6:
+                case 12:
+                case 9:
+                case 21:
+                    return token === 16;
+                case 3:
+                    return token === 16 || token === 71 || token === 77;
+                case 7:
+                    return token === 15 || token === 83 || token === 106;
+                case 8:
+                    return isVariableDeclaratorListTerminator();
+                case 17:
+                    return token === 27 || token === 17 || token === 15 || token === 83 || token === 106;
+                case 11:
+                    return token === 18 || token === 23;
+                case 15:
+                case 19:
+                case 10:
+                    return token === 20;
+                case 16:
+                    return token === 18 || token === 20;
+                case 18:
+                    return token === 27 || token === 17;
+                case 20:
+                    return token === 15 || token === 16;
+                case 13:
+                    return token === 27 || token === 39;
+                case 14:
+                    return token === 25 && lookAhead(nextTokenIsSlash);
+                case 22:
+                    return token === 18 || token === 54 || token === 16;
+                case 23:
+                    return token === 27 || token === 16;
+                case 25:
+                    return token === 20 || token === 16;
+                case 24:
+                    return token === 16;
+            }
+        }
+        function isVariableDeclaratorListTerminator() {
+            if (canParseSemicolon()) {
+                return true;
+            }
+            if (isInOrOfKeyword(token)) {
+                return true;
+            }
+            if (token === 34) {
+                return true;
+            }
+            return false;
+        }
+        function isInSomeParsingContext() {
+            for (var kind = 0; kind < 26; kind++) {
+                if (parsingContext & (1 << kind)) {
+                    if (isListElement(kind, true) || isListTerminator(kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function parseList(kind, parseElement) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = [];
+            result.pos = getNodePos();
+            while (!isListTerminator(kind)) {
+                if (isListElement(kind, false)) {
+                    var element = parseListElement(kind, parseElement);
+                    result.push(element);
+                    continue;
+                }
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
+                }
+            }
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function parseListElement(parsingContext, parseElement) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return consumeNode(node);
+            }
+            return parseElement();
+        }
+        function currentNode(parsingContext) {
+            if (parseErrorBeforeNextFinishedNode) {
+                return undefined;
+            }
+            if (!syntaxCursor) {
+                return undefined;
+            }
+            var node = syntaxCursor.currentNode(scanner.getStartPos());
+            if (ts.nodeIsMissing(node)) {
+                return undefined;
+            }
+            if (node.intersectsChange) {
+                return undefined;
+            }
+            if (ts.containsParseError(node)) {
+                return undefined;
+            }
+            var nodeContextFlags = node.flags & 197132288;
+            if (nodeContextFlags !== contextFlags) {
+                return undefined;
+            }
+            if (!canReuseNode(node, parsingContext)) {
+                return undefined;
+            }
+            return node;
+        }
+        function consumeNode(node) {
+            scanner.setTextPos(node.end);
+            nextToken();
+            return node;
+        }
+        function canReuseNode(node, parsingContext) {
+            switch (parsingContext) {
+                case 5:
+                    return isReusableClassMember(node);
+                case 2:
+                    return isReusableSwitchClause(node);
+                case 0:
+                case 1:
+                case 3:
+                    return isReusableStatement(node);
+                case 6:
+                    return isReusableEnumMember(node);
+                case 4:
+                    return isReusableTypeMember(node);
+                case 8:
+                    return isReusableVariableDeclaration(node);
+                case 16:
+                    return isReusableParameter(node);
+                case 20:
+                case 17:
+                case 19:
+                case 18:
+                case 11:
+                case 12:
+                case 7:
+                case 13:
+                case 14:
+            }
+            return false;
+        }
+        function isReusableClassMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 148:
+                    case 153:
+                    case 149:
+                    case 150:
+                    case 145:
+                    case 198:
+                        return true;
+                    case 147:
+                        var methodDeclaration = node;
+                        var nameIsConstructor = methodDeclaration.name.kind === 69 &&
+                            methodDeclaration.name.originalKeywordKind === 121;
+                        return !nameIsConstructor;
+                }
+            }
+            return false;
+        }
+        function isReusableSwitchClause(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 249:
+                    case 250:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableStatement(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 220:
+                    case 200:
+                    case 199:
+                    case 203:
+                    case 202:
+                    case 215:
+                    case 211:
+                    case 213:
+                    case 210:
+                    case 209:
+                    case 207:
+                    case 208:
+                    case 206:
+                    case 205:
+                    case 212:
+                    case 201:
+                    case 216:
+                    case 214:
+                    case 204:
+                    case 217:
+                    case 230:
+                    case 229:
+                    case 236:
+                    case 235:
+                    case 225:
+                    case 221:
+                    case 222:
+                    case 224:
+                    case 223:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableEnumMember(node) {
+            return node.kind === 255;
+        }
+        function isReusableTypeMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 152:
+                    case 146:
+                    case 153:
+                    case 144:
+                    case 151:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableVariableDeclaration(node) {
+            if (node.kind !== 218) {
+                return false;
+            }
+            var variableDeclarator = node;
+            return variableDeclarator.initializer === undefined;
+        }
+        function isReusableParameter(node) {
+            if (node.kind !== 142) {
+                return false;
+            }
+            var parameter = node;
+            return parameter.initializer === undefined;
+        }
+        function abortParsingListOrMoveToNextToken(kind) {
+            parseErrorAtCurrentToken(parsingContextErrors(kind));
+            if (isInSomeParsingContext()) {
+                return true;
+            }
+            nextToken();
+            return false;
+        }
+        function parsingContextErrors(context) {
+            switch (context) {
+                case 0: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 1: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 2: return ts.Diagnostics.case_or_default_expected;
+                case 3: return ts.Diagnostics.Statement_expected;
+                case 4: return ts.Diagnostics.Property_or_signature_expected;
+                case 5: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
+                case 6: return ts.Diagnostics.Enum_member_expected;
+                case 7: return ts.Diagnostics.Expression_expected;
+                case 8: return ts.Diagnostics.Variable_declaration_expected;
+                case 9: return ts.Diagnostics.Property_destructuring_pattern_expected;
+                case 10: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
+                case 11: return ts.Diagnostics.Argument_expression_expected;
+                case 12: return ts.Diagnostics.Property_assignment_expected;
+                case 15: return ts.Diagnostics.Expression_or_comma_expected;
+                case 16: return ts.Diagnostics.Parameter_declaration_expected;
+                case 17: return ts.Diagnostics.Type_parameter_declaration_expected;
+                case 18: return ts.Diagnostics.Type_argument_expected;
+                case 19: return ts.Diagnostics.Type_expected;
+                case 20: return ts.Diagnostics.Unexpected_token_expected;
+                case 21: return ts.Diagnostics.Identifier_expected;
+                case 13: return ts.Diagnostics.Identifier_expected;
+                case 14: return ts.Diagnostics.Identifier_expected;
+                case 22: return ts.Diagnostics.Parameter_declaration_expected;
+                case 23: return ts.Diagnostics.Type_argument_expected;
+                case 25: return ts.Diagnostics.Type_expected;
+                case 24: return ts.Diagnostics.Property_assignment_expected;
+            }
+        }
+        ;
+        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = [];
+            result.pos = getNodePos();
+            var commaStart = -1;
+            while (true) {
+                if (isListElement(kind, false)) {
+                    result.push(parseListElement(kind, parseElement));
+                    commaStart = scanner.getTokenPos();
+                    if (parseOptional(24)) {
+                        continue;
+                    }
+                    commaStart = -1;
+                    if (isListTerminator(kind)) {
+                        break;
+                    }
+                    parseExpected(24);
+                    if (considerSemicolonAsDelimiter && token === 23 && !scanner.hasPrecedingLineBreak()) {
+                        nextToken();
+                    }
+                    continue;
+                }
+                if (isListTerminator(kind)) {
+                    break;
+                }
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
+                }
+            }
+            if (commaStart >= 0) {
+                result.hasTrailingComma = true;
+            }
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function createMissingList() {
+            var pos = getNodePos();
+            var result = [];
+            result.pos = pos;
+            result.end = pos;
+            return result;
+        }
+        function parseBracketedList(kind, parseElement, open, close) {
+            if (parseExpected(open)) {
+                var result = parseDelimitedList(kind, parseElement);
+                parseExpected(close);
+                return result;
+            }
+            return createMissingList();
+        }
+        function parseEntityName(allowReservedWords, diagnosticMessage) {
+            var entity = parseIdentifier(diagnosticMessage);
+            while (parseOptional(21)) {
+                var node = createNode(139, entity.pos);
+                node.left = entity;
+                node.right = parseRightSideOfDot(allowReservedWords);
+                entity = finishNode(node);
+            }
+            return entity;
+        }
+        function parseRightSideOfDot(allowIdentifierNames) {
+            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token)) {
+                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                if (matchesPattern) {
+                    return createMissingNode(69, true, ts.Diagnostics.Identifier_expected);
+                }
+            }
+            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
+        }
+        function parseTemplateExpression() {
+            var template = createNode(189);
+            template.head = parseTemplateLiteralFragment();
+            ts.Debug.assert(template.head.kind === 12, "Template head has wrong token kind");
+            var templateSpans = [];
+            templateSpans.pos = getNodePos();
+            do {
+                templateSpans.push(parseTemplateSpan());
+            } while (ts.lastOrUndefined(templateSpans).literal.kind === 13);
+            templateSpans.end = getNodeEnd();
+            template.templateSpans = templateSpans;
+            return finishNode(template);
+        }
+        function parseTemplateSpan() {
+            var span = createNode(197);
+            span.expression = allowInAnd(parseExpression);
+            var literal;
+            if (token === 16) {
+                reScanTemplateToken();
+                literal = parseTemplateLiteralFragment();
+            }
+            else {
+                literal = parseExpectedToken(14, false, ts.Diagnostics._0_expected, ts.tokenToString(16));
+            }
+            span.literal = literal;
+            return finishNode(span);
+        }
+        function parseStringLiteralTypeNode() {
+            return parseLiteralLikeNode(166, true);
+        }
+        function parseLiteralNode(internName) {
+            return parseLiteralLikeNode(token, internName);
+        }
+        function parseTemplateLiteralFragment() {
+            return parseLiteralLikeNode(token, false);
+        }
+        function parseLiteralLikeNode(kind, internName) {
+            var node = createNode(kind);
+            var text = scanner.getTokenValue();
+            node.text = internName ? internIdentifier(text) : text;
+            if (scanner.hasExtendedUnicodeEscape()) {
+                node.hasExtendedUnicodeEscape = true;
+            }
+            if (scanner.isUnterminated()) {
+                node.isUnterminated = true;
+            }
+            var tokenPos = scanner.getTokenPos();
+            nextToken();
+            finishNode(node);
+            if (node.kind === 8
+                && sourceText.charCodeAt(tokenPos) === 48
+                && ts.isOctalDigit(sourceText.charCodeAt(tokenPos + 1))) {
+                node.isOctalLiteral = true;
+            }
+            return node;
+        }
+        function parseTypeReference() {
+            var typeName = parseEntityName(false, ts.Diagnostics.Type_expected);
+            var node = createNode(155, typeName.pos);
+            node.typeName = typeName;
+            if (!scanner.hasPrecedingLineBreak() && token === 25) {
+                node.typeArguments = parseBracketedList(18, parseType, 25, 27);
+            }
+            return finishNode(node);
+        }
+        function parseThisTypePredicate(lhs) {
+            nextToken();
+            var node = createNode(154, lhs.pos);
+            node.parameterName = lhs;
+            node.type = parseType();
+            return finishNode(node);
+        }
+        function parseThisTypeNode() {
+            var node = createNode(165);
+            nextToken();
+            return finishNode(node);
+        }
+        function parseTypeQuery() {
+            var node = createNode(158);
+            parseExpected(101);
+            node.exprName = parseEntityName(true);
+            return finishNode(node);
+        }
+        function parseTypeParameter() {
+            var node = createNode(141);
+            node.name = parseIdentifier();
+            if (parseOptional(83)) {
+                if (isStartOfType() || !isStartOfExpression()) {
+                    node.constraint = parseType();
+                }
+                else {
+                    node.expression = parseUnaryExpressionOrHigher();
+                }
+            }
+            return finishNode(node);
+        }
+        function parseTypeParameters() {
+            if (token === 25) {
+                return parseBracketedList(17, parseTypeParameter, 25, 27);
+            }
+        }
+        function parseParameterType() {
+            if (parseOptional(54)) {
+                return parseType();
+            }
+            return undefined;
+        }
+        function isStartOfParameter() {
+            return token === 22 || isIdentifierOrPattern() || ts.isModifierKind(token) || token === 55 || token === 97;
+        }
+        function setModifiers(node, modifiers) {
+            if (modifiers) {
+                node.flags |= modifiers.flags;
+                node.modifiers = modifiers;
+            }
+        }
+        function parseParameter() {
+            var node = createNode(142);
+            if (token === 97) {
+                node.name = createIdentifier(true, undefined);
+                node.type = parseParameterType();
+                return finishNode(node);
+            }
+            node.decorators = parseDecorators();
+            setModifiers(node, parseModifiers());
+            node.dotDotDotToken = parseOptionalToken(22);
+            node.name = parseIdentifierOrPattern();
+            if (ts.getFullWidth(node.name) === 0 && node.flags === 0 && ts.isModifierKind(token)) {
+                nextToken();
+            }
+            node.questionToken = parseOptionalToken(53);
+            node.type = parseParameterType();
+            node.initializer = parseBindingElementInitializer(true);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseBindingElementInitializer(inParameter) {
+            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
+        }
+        function parseParameterInitializer() {
+            return parseInitializer(true);
+        }
+        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
+            var returnTokenRequired = returnToken === 34;
+            signature.typeParameters = parseTypeParameters();
+            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
+            if (returnTokenRequired) {
+                parseExpected(returnToken);
+                signature.type = parseTypeOrTypePredicate();
+            }
+            else if (parseOptional(returnToken)) {
+                signature.type = parseTypeOrTypePredicate();
+            }
+        }
+        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
+            if (parseExpected(17)) {
+                var savedYieldContext = inYieldContext();
+                var savedAwaitContext = inAwaitContext();
+                setYieldContext(yieldContext);
+                setAwaitContext(awaitContext);
+                var result = parseDelimitedList(16, parseParameter);
+                setYieldContext(savedYieldContext);
+                setAwaitContext(savedAwaitContext);
+                if (!parseExpected(18) && requireCompleteParameterList) {
+                    return undefined;
+                }
+                return result;
+            }
+            return requireCompleteParameterList ? undefined : createMissingList();
+        }
+        function parseTypeMemberSemicolon() {
+            if (parseOptional(24)) {
+                return;
+            }
+            parseSemicolon();
+        }
+        function parseSignatureMember(kind) {
+            var node = createNode(kind);
+            if (kind === 152) {
+                parseExpected(92);
+            }
+            fillSignature(54, false, false, false, node);
+            parseTypeMemberSemicolon();
+            return finishNode(node);
+        }
+        function isIndexSignature() {
+            if (token !== 19) {
+                return false;
+            }
+            return lookAhead(isUnambiguouslyIndexSignature);
+        }
+        function isUnambiguouslyIndexSignature() {
+            nextToken();
+            if (token === 22 || token === 20) {
+                return true;
+            }
+            if (ts.isModifierKind(token)) {
+                nextToken();
+                if (isIdentifier()) {
+                    return true;
+                }
+            }
+            else if (!isIdentifier()) {
+                return false;
+            }
+            else {
+                nextToken();
+            }
+            if (token === 54 || token === 24) {
+                return true;
+            }
+            if (token !== 53) {
+                return false;
+            }
+            nextToken();
+            return token === 54 || token === 24 || token === 20;
+        }
+        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(153, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.parameters = parseBracketedList(16, parseParameter, 19, 20);
+            node.type = parseTypeAnnotation();
+            parseTypeMemberSemicolon();
+            return finishNode(node);
+        }
+        function parsePropertyOrMethodSignature(fullStart, modifiers) {
+            var name = parsePropertyName();
+            var questionToken = parseOptionalToken(53);
+            if (token === 17 || token === 25) {
+                var method = createNode(146, fullStart);
+                setModifiers(method, modifiers);
+                method.name = name;
+                method.questionToken = questionToken;
+                fillSignature(54, false, false, false, method);
+                parseTypeMemberSemicolon();
+                return finishNode(method);
+            }
+            else {
+                var property = createNode(144, fullStart);
+                setModifiers(property, modifiers);
+                property.name = name;
+                property.questionToken = questionToken;
+                property.type = parseTypeAnnotation();
+                if (token === 56) {
+                    property.initializer = parseNonParameterInitializer();
+                }
+                parseTypeMemberSemicolon();
+                return finishNode(property);
+            }
+        }
+        function isTypeMemberStart() {
+            var idToken;
+            if (token === 17 || token === 25) {
+                return true;
+            }
+            while (ts.isModifierKind(token)) {
+                idToken = token;
+                nextToken();
+            }
+            if (token === 19) {
+                return true;
+            }
+            if (isLiteralPropertyName()) {
+                idToken = token;
+                nextToken();
+            }
+            if (idToken) {
+                return token === 17 ||
+                    token === 25 ||
+                    token === 53 ||
+                    token === 54 ||
+                    canParseSemicolon();
+            }
+            return false;
+        }
+        function parseTypeMember() {
+            if (token === 17 || token === 25) {
+                return parseSignatureMember(151);
+            }
+            if (token === 92 && lookAhead(isStartOfConstructSignature)) {
+                return parseSignatureMember(152);
+            }
+            var fullStart = getNodePos();
+            var modifiers = parseModifiers();
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, undefined, modifiers);
+            }
+            return parsePropertyOrMethodSignature(fullStart, modifiers);
+        }
+        function isStartOfConstructSignature() {
+            nextToken();
+            return token === 17 || token === 25;
+        }
+        function parseTypeLiteral() {
+            var node = createNode(159);
+            node.members = parseObjectTypeMembers();
+            return finishNode(node);
+        }
+        function parseObjectTypeMembers() {
+            var members;
+            if (parseExpected(15)) {
+                members = parseList(4, parseTypeMember);
+                parseExpected(16);
+            }
+            else {
+                members = createMissingList();
+            }
+            return members;
+        }
+        function parseTupleType() {
+            var node = createNode(161);
+            node.elementTypes = parseBracketedList(19, parseType, 19, 20);
+            return finishNode(node);
+        }
+        function parseParenthesizedType() {
+            var node = createNode(164);
+            parseExpected(17);
+            node.type = parseType();
+            parseExpected(18);
+            return finishNode(node);
+        }
+        function parseFunctionOrConstructorType(kind) {
+            var node = createNode(kind);
+            if (kind === 157) {
+                parseExpected(92);
+            }
+            fillSignature(34, false, false, false, node);
+            return finishNode(node);
+        }
+        function parseKeywordAndNoDot() {
+            var node = parseTokenNode();
+            return token === 21 ? undefined : node;
+        }
+        function parseNonArrayType() {
+            switch (token) {
+                case 117:
+                case 132:
+                case 130:
+                case 120:
+                case 133:
+                case 135:
+                case 127:
+                    var node = tryParse(parseKeywordAndNoDot);
+                    return node || parseTypeReference();
+                case 9:
+                    return parseStringLiteralTypeNode();
+                case 103:
+                case 93:
+                    return parseTokenNode();
+                case 97: {
+                    var thisKeyword = parseThisTypeNode();
+                    if (token === 124 && !scanner.hasPrecedingLineBreak()) {
+                        return parseThisTypePredicate(thisKeyword);
+                    }
+                    else {
+                        return thisKeyword;
+                    }
+                }
+                case 101:
+                    return parseTypeQuery();
+                case 15:
+                    return parseTypeLiteral();
+                case 19:
+                    return parseTupleType();
+                case 17:
+                    return parseParenthesizedType();
+                default:
+                    return parseTypeReference();
+            }
+        }
+        function isStartOfType() {
+            switch (token) {
+                case 117:
+                case 132:
+                case 130:
+                case 120:
+                case 133:
+                case 103:
+                case 135:
+                case 93:
+                case 97:
+                case 101:
+                case 127:
+                case 15:
+                case 19:
+                case 25:
+                case 92:
+                case 9:
+                    return true;
+                case 17:
+                    return lookAhead(isStartOfParenthesizedOrFunctionType);
+                default:
+                    return isIdentifier();
+            }
+        }
+        function isStartOfParenthesizedOrFunctionType() {
+            nextToken();
+            return token === 18 || isStartOfParameter() || isStartOfType();
+        }
+        function parseArrayTypeOrHigher() {
+            var type = parseNonArrayType();
+            while (!scanner.hasPrecedingLineBreak() && parseOptional(19)) {
+                parseExpected(20);
+                var node = createNode(160, type.pos);
+                node.elementType = type;
+                type = finishNode(node);
+            }
+            return type;
+        }
+        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
+            var type = parseConstituentType();
+            if (token === operator) {
+                var types = [type];
+                types.pos = type.pos;
+                while (parseOptional(operator)) {
+                    types.push(parseConstituentType());
+                }
+                types.end = getNodeEnd();
+                var node = createNode(kind, type.pos);
+                node.types = types;
+                type = finishNode(node);
+            }
+            return type;
+        }
+        function parseIntersectionTypeOrHigher() {
+            return parseUnionOrIntersectionType(163, parseArrayTypeOrHigher, 46);
+        }
+        function parseUnionTypeOrHigher() {
+            return parseUnionOrIntersectionType(162, parseIntersectionTypeOrHigher, 47);
+        }
+        function isStartOfFunctionType() {
+            if (token === 25) {
+                return true;
+            }
+            return token === 17 && lookAhead(isUnambiguouslyStartOfFunctionType);
+        }
+        function skipParameterStart() {
+            if (ts.isModifierKind(token)) {
+                parseModifiers();
+            }
+            if (isIdentifier() || token === 97) {
+                nextToken();
+                return true;
+            }
+            if (token === 19 || token === 15) {
+                var previousErrorCount = parseDiagnostics.length;
+                parseIdentifierOrPattern();
+                return previousErrorCount === parseDiagnostics.length;
+            }
+            return false;
+        }
+        function isUnambiguouslyStartOfFunctionType() {
+            nextToken();
+            if (token === 18 || token === 22) {
+                return true;
+            }
+            if (skipParameterStart()) {
+                if (token === 54 || token === 24 ||
+                    token === 53 || token === 56) {
+                    return true;
+                }
+                if (token === 18) {
+                    nextToken();
+                    if (token === 34) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function parseTypeOrTypePredicate() {
+            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
+            var type = parseType();
+            if (typePredicateVariable) {
+                var node = createNode(154, typePredicateVariable.pos);
+                node.parameterName = typePredicateVariable;
+                node.type = type;
+                return finishNode(node);
+            }
+            else {
+                return type;
+            }
+        }
+        function parseTypePredicatePrefix() {
+            var id = parseIdentifier();
+            if (token === 124 && !scanner.hasPrecedingLineBreak()) {
+                nextToken();
+                return id;
+            }
+        }
+        function parseType() {
+            return doOutsideOfContext(41943040, parseTypeWorker);
+        }
+        function parseTypeWorker() {
+            if (isStartOfFunctionType()) {
+                return parseFunctionOrConstructorType(156);
+            }
+            if (token === 92) {
+                return parseFunctionOrConstructorType(157);
+            }
+            return parseUnionTypeOrHigher();
+        }
+        function parseTypeAnnotation() {
+            return parseOptional(54) ? parseType() : undefined;
+        }
+        function isStartOfLeftHandSideExpression() {
+            switch (token) {
+                case 97:
+                case 95:
+                case 93:
+                case 99:
+                case 84:
+                case 8:
+                case 9:
+                case 11:
+                case 12:
+                case 17:
+                case 19:
+                case 15:
+                case 87:
+                case 73:
+                case 92:
+                case 39:
+                case 61:
+                case 69:
+                    return true;
+                default:
+                    return isIdentifier();
+            }
+        }
+        function isStartOfExpression() {
+            if (isStartOfLeftHandSideExpression()) {
+                return true;
+            }
+            switch (token) {
+                case 35:
+                case 36:
+                case 50:
+                case 49:
+                case 78:
+                case 101:
+                case 103:
+                case 41:
+                case 42:
+                case 25:
+                case 119:
+                case 114:
+                    return true;
+                default:
+                    if (isBinaryOperator()) {
+                        return true;
+                    }
+                    return isIdentifier();
+            }
+        }
+        function isStartOfExpressionStatement() {
+            return token !== 15 &&
+                token !== 87 &&
+                token !== 73 &&
+                token !== 55 &&
+                isStartOfExpression();
+        }
+        function parseExpression() {
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(false);
+            }
+            var expr = parseAssignmentExpressionOrHigher();
+            var operatorToken;
+            while ((operatorToken = parseOptionalToken(24))) {
+                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
+            }
+            if (saveDecoratorContext) {
+                setDecoratorContext(true);
+            }
+            return expr;
+        }
+        function parseInitializer(inParameter) {
+            if (token !== 56) {
+                if (scanner.hasPrecedingLineBreak() || (inParameter && token === 15) || !isStartOfExpression()) {
+                    return undefined;
+                }
+            }
+            parseExpected(56);
+            return parseAssignmentExpressionOrHigher();
+        }
+        function parseAssignmentExpressionOrHigher() {
+            if (isYieldExpression()) {
+                return parseYieldExpression();
+            }
+            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
+            if (arrowExpression) {
+                return arrowExpression;
+            }
+            var expr = parseBinaryExpressionOrHigher(0);
+            if (expr.kind === 69 && token === 34) {
+                return parseSimpleArrowFunctionExpression(expr);
+            }
+            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
+                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
+            }
+            return parseConditionalExpressionRest(expr);
+        }
+        function isYieldExpression() {
+            if (token === 114) {
+                if (inYieldContext()) {
+                    return true;
+                }
+                return lookAhead(nextTokenIsIdentifierOrKeywordOrNumberOnSameLine);
+            }
+            return false;
+        }
+        function nextTokenIsIdentifierOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && isIdentifier();
+        }
+        function parseYieldExpression() {
+            var node = createNode(190);
+            nextToken();
+            if (!scanner.hasPrecedingLineBreak() &&
+                (token === 37 || isStartOfExpression())) {
+                node.asteriskToken = parseOptionalToken(37);
+                node.expression = parseAssignmentExpressionOrHigher();
+                return finishNode(node);
+            }
+            else {
+                return finishNode(node);
+            }
+        }
+        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
+            ts.Debug.assert(token === 34, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
+            var node;
+            if (asyncModifier) {
+                node = createNode(180, asyncModifier.pos);
+                setModifiers(node, asyncModifier);
+            }
+            else {
+                node = createNode(180, identifier.pos);
+            }
+            var parameter = createNode(142, identifier.pos);
+            parameter.name = identifier;
+            finishNode(parameter);
+            node.parameters = [parameter];
+            node.parameters.pos = parameter.pos;
+            node.parameters.end = parameter.end;
+            node.equalsGreaterThanToken = parseExpectedToken(34, false, ts.Diagnostics._0_expected, "=>");
+            node.body = parseArrowFunctionExpressionBody(!!asyncModifier);
+            return finishNode(node);
+        }
+        function tryParseParenthesizedArrowFunctionExpression() {
+            var triState = isParenthesizedArrowFunctionExpression();
+            if (triState === 0) {
+                return undefined;
+            }
+            var arrowFunction = triState === 1
+                ? parseParenthesizedArrowFunctionExpressionHead(true)
+                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
+            if (!arrowFunction) {
+                return undefined;
+            }
+            var isAsync = !!(arrowFunction.flags & 256);
+            var lastToken = token;
+            arrowFunction.equalsGreaterThanToken = parseExpectedToken(34, false, ts.Diagnostics._0_expected, "=>");
+            arrowFunction.body = (lastToken === 34 || lastToken === 15)
+                ? parseArrowFunctionExpressionBody(isAsync)
+                : parseIdentifier();
+            return finishNode(arrowFunction);
+        }
+        function isParenthesizedArrowFunctionExpression() {
+            if (token === 17 || token === 25 || token === 118) {
+                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
+            }
+            if (token === 34) {
+                return 1;
+            }
+            return 0;
+        }
+        function isParenthesizedArrowFunctionExpressionWorker() {
+            if (token === 118) {
+                nextToken();
+                if (scanner.hasPrecedingLineBreak()) {
+                    return 0;
+                }
+                if (token !== 17 && token !== 25) {
+                    return 0;
+                }
+            }
+            var first = token;
+            var second = nextToken();
+            if (first === 17) {
+                if (second === 18) {
+                    var third = nextToken();
+                    switch (third) {
+                        case 34:
+                        case 54:
+                        case 15:
+                            return 1;
+                        default:
+                            return 0;
+                    }
+                }
+                if (second === 19 || second === 15) {
+                    return 2;
+                }
+                if (second === 22) {
+                    return 1;
+                }
+                if (!isIdentifier()) {
+                    return 0;
+                }
+                if (nextToken() === 54) {
+                    return 1;
+                }
+                return 2;
+            }
+            else {
+                ts.Debug.assert(first === 25);
+                if (!isIdentifier()) {
+                    return 0;
+                }
+                if (sourceFile.languageVariant === 1) {
+                    var isArrowFunctionInJsx = lookAhead(function () {
+                        var third = nextToken();
+                        if (third === 83) {
+                            var fourth = nextToken();
+                            switch (fourth) {
+                                case 56:
+                                case 27:
+                                    return false;
+                                default:
+                                    return true;
+                            }
+                        }
+                        else if (third === 24) {
+                            return true;
+                        }
+                        return false;
+                    });
+                    if (isArrowFunctionInJsx) {
+                        return 1;
+                    }
+                    return 0;
+                }
+                return 2;
+            }
+        }
+        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
+            return parseParenthesizedArrowFunctionExpressionHead(false);
+        }
+        function tryParseAsyncSimpleArrowFunctionExpression() {
+            if (token === 118) {
+                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
+                if (isUnParenthesizedAsyncArrowFunction === 1) {
+                    var asyncModifier = parseModifiersForArrowFunction();
+                    var expr = parseBinaryExpressionOrHigher(0);
+                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
+                }
+            }
+            return undefined;
+        }
+        function isUnParenthesizedAsyncArrowFunctionWorker() {
+            if (token === 118) {
+                nextToken();
+                if (scanner.hasPrecedingLineBreak() || token === 34) {
+                    return 0;
+                }
+                var expr = parseBinaryExpressionOrHigher(0);
+                if (!scanner.hasPrecedingLineBreak() && expr.kind === 69 && token === 34) {
+                    return 1;
+                }
+            }
+            return 0;
+        }
+        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
+            var node = createNode(180);
+            setModifiers(node, parseModifiersForArrowFunction());
+            var isAsync = !!(node.flags & 256);
+            fillSignature(54, false, isAsync, !allowAmbiguity, node);
+            if (!node.parameters) {
+                return undefined;
+            }
+            if (!allowAmbiguity && token !== 34 && token !== 15) {
+                return undefined;
+            }
+            return node;
+        }
+        function parseArrowFunctionExpressionBody(isAsync) {
+            if (token === 15) {
+                return parseFunctionBlock(false, isAsync, false);
+            }
+            if (token !== 23 &&
+                token !== 87 &&
+                token !== 73 &&
+                isStartOfStatement() &&
+                !isStartOfExpressionStatement()) {
+                return parseFunctionBlock(false, isAsync, true);
+            }
+            return isAsync
+                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
+                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
+        }
+        function parseConditionalExpressionRest(leftOperand) {
+            var questionToken = parseOptionalToken(53);
+            if (!questionToken) {
+                return leftOperand;
+            }
+            var node = createNode(188, leftOperand.pos);
+            node.condition = leftOperand;
+            node.questionToken = questionToken;
+            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
+            node.colonToken = parseExpectedToken(54, false, ts.Diagnostics._0_expected, ts.tokenToString(54));
+            node.whenFalse = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
+        }
+        function parseBinaryExpressionOrHigher(precedence) {
+            var leftOperand = parseUnaryExpressionOrHigher();
+            return parseBinaryExpressionRest(precedence, leftOperand);
+        }
+        function isInOrOfKeyword(t) {
+            return t === 90 || t === 138;
+        }
+        function parseBinaryExpressionRest(precedence, leftOperand) {
+            while (true) {
+                reScanGreaterToken();
+                var newPrecedence = getBinaryOperatorPrecedence();
+                var consumeCurrentOperator = token === 38 ?
+                    newPrecedence >= precedence :
+                    newPrecedence > precedence;
+                if (!consumeCurrentOperator) {
+                    break;
+                }
+                if (token === 90 && inDisallowInContext()) {
+                    break;
+                }
+                if (token === 116) {
+                    if (scanner.hasPrecedingLineBreak()) {
+                        break;
+                    }
+                    else {
+                        nextToken();
+                        leftOperand = makeAsExpression(leftOperand, parseType());
+                    }
+                }
+                else {
+                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
+                }
+            }
+            return leftOperand;
+        }
+        function isBinaryOperator() {
+            if (inDisallowInContext() && token === 90) {
+                return false;
+            }
+            return getBinaryOperatorPrecedence() > 0;
+        }
+        function getBinaryOperatorPrecedence() {
+            switch (token) {
+                case 52:
+                    return 1;
+                case 51:
+                    return 2;
+                case 47:
+                    return 3;
+                case 48:
+                    return 4;
+                case 46:
+                    return 5;
+                case 30:
+                case 31:
+                case 32:
+                case 33:
+                    return 6;
+                case 25:
+                case 27:
+                case 28:
+                case 29:
+                case 91:
+                case 90:
+                case 116:
+                    return 7;
+                case 43:
+                case 44:
+                case 45:
+                    return 8;
+                case 35:
+                case 36:
+                    return 9;
+                case 37:
+                case 39:
+                case 40:
+                    return 10;
+                case 38:
+                    return 11;
+            }
+            return -1;
+        }
+        function makeBinaryExpression(left, operatorToken, right) {
+            var node = createNode(187, left.pos);
+            node.left = left;
+            node.operatorToken = operatorToken;
+            node.right = right;
+            return finishNode(node);
+        }
+        function makeAsExpression(left, right) {
+            var node = createNode(195, left.pos);
+            node.expression = left;
+            node.type = right;
+            return finishNode(node);
+        }
+        function parsePrefixUnaryExpression() {
+            var node = createNode(185);
+            node.operator = token;
+            nextToken();
+            node.operand = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseDeleteExpression() {
+            var node = createNode(181);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseTypeOfExpression() {
+            var node = createNode(182);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseVoidExpression() {
+            var node = createNode(183);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function isAwaitExpression() {
+            if (token === 119) {
+                if (inAwaitContext()) {
+                    return true;
+                }
+                return lookAhead(nextTokenIsIdentifierOnSameLine);
+            }
+            return false;
+        }
+        function parseAwaitExpression() {
+            var node = createNode(184);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseUnaryExpressionOrHigher() {
+            if (isAwaitExpression()) {
+                return parseAwaitExpression();
+            }
+            if (isIncrementExpression()) {
+                var incrementExpression = parseIncrementExpression();
+                return token === 38 ?
+                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), incrementExpression) :
+                    incrementExpression;
+            }
+            var unaryOperator = token;
+            var simpleUnaryExpression = parseSimpleUnaryExpression();
+            if (token === 38) {
+                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
+                if (simpleUnaryExpression.kind === 177) {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
+                }
+                else {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
+                }
+            }
+            return simpleUnaryExpression;
+        }
+        function parseSimpleUnaryExpression() {
+            switch (token) {
+                case 35:
+                case 36:
+                case 50:
+                case 49:
+                    return parsePrefixUnaryExpression();
+                case 78:
+                    return parseDeleteExpression();
+                case 101:
+                    return parseTypeOfExpression();
+                case 103:
+                    return parseVoidExpression();
+                case 25:
+                    return parseTypeAssertion();
+                default:
+                    return parseIncrementExpression();
+            }
+        }
+        function isIncrementExpression() {
+            switch (token) {
+                case 35:
+                case 36:
+                case 50:
+                case 49:
+                case 78:
+                case 101:
+                case 103:
+                    return false;
+                case 25:
+                    if (sourceFile.languageVariant !== 1) {
+                        return false;
+                    }
+                default:
+                    return true;
+            }
+        }
+        function parseIncrementExpression() {
+            if (token === 41 || token === 42) {
+                var node = createNode(185);
+                node.operator = token;
+                nextToken();
+                node.operand = parseLeftHandSideExpressionOrHigher();
+                return finishNode(node);
+            }
+            else if (sourceFile.languageVariant === 1 && token === 25 && lookAhead(nextTokenIsIdentifierOrKeyword)) {
+                return parseJsxElementOrSelfClosingElement(true);
+            }
+            var expression = parseLeftHandSideExpressionOrHigher();
+            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
+            if ((token === 41 || token === 42) && !scanner.hasPrecedingLineBreak()) {
+                var node = createNode(186, expression.pos);
+                node.operand = expression;
+                node.operator = token;
+                nextToken();
+                return finishNode(node);
+            }
+            return expression;
+        }
+        function parseLeftHandSideExpressionOrHigher() {
+            var expression = token === 95
+                ? parseSuperExpression()
+                : parseMemberExpressionOrHigher();
+            return parseCallExpressionRest(expression);
+        }
+        function parseMemberExpressionOrHigher() {
+            var expression = parsePrimaryExpression();
+            return parseMemberExpressionRest(expression);
+        }
+        function parseSuperExpression() {
+            var expression = parseTokenNode();
+            if (token === 17 || token === 21 || token === 19) {
+                return expression;
+            }
+            var node = createNode(172, expression.pos);
+            node.expression = expression;
+            node.dotToken = parseExpectedToken(21, false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
+            node.name = parseRightSideOfDot(true);
+            return finishNode(node);
+        }
+        function tagNamesAreEquivalent(lhs, rhs) {
+            if (lhs.kind !== rhs.kind) {
+                return false;
+            }
+            if (lhs.kind === 69) {
+                return lhs.text === rhs.text;
+            }
+            return lhs.right.text === rhs.right.text &&
+                tagNamesAreEquivalent(lhs.left, rhs.left);
+        }
+        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
+            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
+            var result;
+            if (opening.kind === 243) {
+                var node = createNode(241, opening.pos);
+                node.openingElement = opening;
+                node.children = parseJsxChildren(node.openingElement.tagName);
+                node.closingElement = parseJsxClosingElement(inExpressionContext);
+                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
+                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
+                }
+                result = finishNode(node);
+            }
+            else {
+                ts.Debug.assert(opening.kind === 242);
+                result = opening;
+            }
+            if (inExpressionContext && token === 25) {
+                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(true); });
+                if (invalidElement) {
+                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
+                    var badNode = createNode(187, result.pos);
+                    badNode.end = invalidElement.end;
+                    badNode.left = result;
+                    badNode.right = invalidElement;
+                    badNode.operatorToken = createMissingNode(24, false, undefined);
+                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
+                    return badNode;
+                }
+            }
+            return result;
+        }
+        function parseJsxText() {
+            var node = createNode(244, scanner.getStartPos());
+            token = scanner.scanJsxToken();
+            return finishNode(node);
+        }
+        function parseJsxChild() {
+            switch (token) {
+                case 244:
+                    return parseJsxText();
+                case 15:
+                    return parseJsxExpression(false);
+                case 25:
+                    return parseJsxElementOrSelfClosingElement(false);
+            }
+            ts.Debug.fail("Unknown JSX child kind " + token);
+        }
+        function parseJsxChildren(openingTagName) {
+            var result = [];
+            result.pos = scanner.getStartPos();
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << 14;
+            while (true) {
+                token = scanner.reScanJsxToken();
+                if (token === 26) {
+                    break;
+                }
+                else if (token === 1) {
+                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
+                    break;
+                }
+                result.push(parseJsxChild());
+            }
+            result.end = scanner.getTokenPos();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
+            var fullStart = scanner.getStartPos();
+            parseExpected(25);
+            var tagName = parseJsxElementName();
+            var attributes = parseList(13, parseJsxAttribute);
+            var node;
+            if (token === 27) {
+                node = createNode(243, fullStart);
+                scanJsxText();
+            }
+            else {
+                parseExpected(39);
+                if (inExpressionContext) {
+                    parseExpected(27);
+                }
+                else {
+                    parseExpected(27, undefined, false);
+                    scanJsxText();
+                }
+                node = createNode(242, fullStart);
+            }
+            node.tagName = tagName;
+            node.attributes = attributes;
+            return finishNode(node);
+        }
+        function parseJsxElementName() {
+            scanJsxIdentifier();
+            var elementName = parseIdentifierName();
+            while (parseOptional(21)) {
+                scanJsxIdentifier();
+                var node = createNode(139, elementName.pos);
+                node.left = elementName;
+                node.right = parseIdentifierName();
+                elementName = finishNode(node);
+            }
+            return elementName;
+        }
+        function parseJsxExpression(inExpressionContext) {
+            var node = createNode(248);
+            parseExpected(15);
+            if (token !== 16) {
+                node.expression = parseAssignmentExpressionOrHigher();
+            }
+            if (inExpressionContext) {
+                parseExpected(16);
+            }
+            else {
+                parseExpected(16, undefined, false);
+                scanJsxText();
+            }
+            return finishNode(node);
+        }
+        function parseJsxAttribute() {
+            if (token === 15) {
+                return parseJsxSpreadAttribute();
+            }
+            scanJsxIdentifier();
+            var node = createNode(246);
+            node.name = parseIdentifierName();
+            if (parseOptional(56)) {
+                switch (token) {
+                    case 9:
+                        node.initializer = parseLiteralNode();
+                        break;
+                    default:
+                        node.initializer = parseJsxExpression(true);
+                        break;
+                }
+            }
+            return finishNode(node);
+        }
+        function parseJsxSpreadAttribute() {
+            var node = createNode(247);
+            parseExpected(15);
+            parseExpected(22);
+            node.expression = parseExpression();
+            parseExpected(16);
+            return finishNode(node);
+        }
+        function parseJsxClosingElement(inExpressionContext) {
+            var node = createNode(245);
+            parseExpected(26);
+            node.tagName = parseJsxElementName();
+            if (inExpressionContext) {
+                parseExpected(27);
+            }
+            else {
+                parseExpected(27, undefined, false);
+                scanJsxText();
+            }
+            return finishNode(node);
+        }
+        function parseTypeAssertion() {
+            var node = createNode(177);
+            parseExpected(25);
+            node.type = parseType();
+            parseExpected(27);
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseMemberExpressionRest(expression) {
+            while (true) {
+                var dotToken = parseOptionalToken(21);
+                if (dotToken) {
+                    var propertyAccess = createNode(172, expression.pos);
+                    propertyAccess.expression = expression;
+                    propertyAccess.dotToken = dotToken;
+                    propertyAccess.name = parseRightSideOfDot(true);
+                    expression = finishNode(propertyAccess);
+                    continue;
+                }
+                if (token === 49 && !scanner.hasPrecedingLineBreak()) {
+                    nextToken();
+                    var nonNullExpression = createNode(196, expression.pos);
+                    nonNullExpression.expression = expression;
+                    expression = finishNode(nonNullExpression);
+                    continue;
+                }
+                if (!inDecoratorContext() && parseOptional(19)) {
+                    var indexedAccess = createNode(173, expression.pos);
+                    indexedAccess.expression = expression;
+                    if (token !== 20) {
+                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
+                        if (indexedAccess.argumentExpression.kind === 9 || indexedAccess.argumentExpression.kind === 8) {
+                            var literal = indexedAccess.argumentExpression;
+                            literal.text = internIdentifier(literal.text);
+                        }
+                    }
+                    parseExpected(20);
+                    expression = finishNode(indexedAccess);
+                    continue;
+                }
+                if (token === 11 || token === 12) {
+                    var tagExpression = createNode(176, expression.pos);
+                    tagExpression.tag = expression;
+                    tagExpression.template = token === 11
+                        ? parseLiteralNode()
+                        : parseTemplateExpression();
+                    expression = finishNode(tagExpression);
+                    continue;
+                }
+                return expression;
+            }
+        }
+        function parseCallExpressionRest(expression) {
+            while (true) {
+                expression = parseMemberExpressionRest(expression);
+                if (token === 25) {
+                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
+                    if (!typeArguments) {
+                        return expression;
+                    }
+                    var callExpr = createNode(174, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.typeArguments = typeArguments;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                else if (token === 17) {
+                    var callExpr = createNode(174, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                return expression;
+            }
+        }
+        function parseArgumentList() {
+            parseExpected(17);
+            var result = parseDelimitedList(11, parseArgumentExpression);
+            parseExpected(18);
+            return result;
+        }
+        function parseTypeArgumentsInExpression() {
+            if (!parseOptional(25)) {
+                return undefined;
+            }
+            var typeArguments = parseDelimitedList(18, parseType);
+            if (!parseExpected(27)) {
+                return undefined;
+            }
+            return typeArguments && canFollowTypeArgumentsInExpression()
+                ? typeArguments
+                : undefined;
+        }
+        function canFollowTypeArgumentsInExpression() {
+            switch (token) {
+                case 17:
+                case 21:
+                case 18:
+                case 20:
+                case 54:
+                case 23:
+                case 53:
+                case 30:
+                case 32:
+                case 31:
+                case 33:
+                case 51:
+                case 52:
+                case 48:
+                case 46:
+                case 47:
+                case 16:
+                case 1:
+                    return true;
+                case 24:
+                case 15:
+                default:
+                    return false;
+            }
+        }
+        function parsePrimaryExpression() {
+            switch (token) {
+                case 8:
+                case 9:
+                case 11:
+                    return parseLiteralNode();
+                case 97:
+                case 95:
+                case 93:
+                case 99:
+                case 84:
+                    return parseTokenNode();
+                case 17:
+                    return parseParenthesizedExpression();
+                case 19:
+                    return parseArrayLiteralExpression();
+                case 15:
+                    return parseObjectLiteralExpression();
+                case 118:
+                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
+                        break;
+                    }
+                    return parseFunctionExpression();
+                case 73:
+                    return parseClassExpression();
+                case 87:
+                    return parseFunctionExpression();
+                case 92:
+                    return parseNewExpression();
+                case 39:
+                case 61:
+                    if (reScanSlashToken() === 10) {
+                        return parseLiteralNode();
+                    }
+                    break;
+                case 12:
+                    return parseTemplateExpression();
+            }
+            return parseIdentifier(ts.Diagnostics.Expression_expected);
+        }
+        function parseParenthesizedExpression() {
+            var node = createNode(178);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            return finishNode(node);
+        }
+        function parseSpreadElement() {
+            var node = createNode(191);
+            parseExpected(22);
+            node.expression = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
+        }
+        function parseArgumentOrArrayLiteralElement() {
+            return token === 22 ? parseSpreadElement() :
+                token === 24 ? createNode(193) :
+                    parseAssignmentExpressionOrHigher();
+        }
+        function parseArgumentExpression() {
+            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
+        }
+        function parseArrayLiteralExpression() {
+            var node = createNode(170);
+            parseExpected(19);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.elements = parseDelimitedList(15, parseArgumentOrArrayLiteralElement);
+            parseExpected(20);
+            return finishNode(node);
+        }
+        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
+            if (parseContextualModifier(123)) {
+                return addJSDocComment(parseAccessorDeclaration(149, fullStart, decorators, modifiers));
+            }
+            else if (parseContextualModifier(131)) {
+                return parseAccessorDeclaration(150, fullStart, decorators, modifiers);
+            }
+            return undefined;
+        }
+        function parseObjectLiteralElement() {
+            var fullStart = scanner.getStartPos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
+            }
+            var asteriskToken = parseOptionalToken(37);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            var questionToken = parseOptionalToken(53);
+            if (asteriskToken || token === 17 || token === 25) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
+            }
+            var isShorthandPropertyAssignment = tokenIsIdentifier && (token === 24 || token === 16 || token === 56);
+            if (isShorthandPropertyAssignment) {
+                var shorthandDeclaration = createNode(254, fullStart);
+                shorthandDeclaration.name = propertyName;
+                shorthandDeclaration.questionToken = questionToken;
+                var equalsToken = parseOptionalToken(56);
+                if (equalsToken) {
+                    shorthandDeclaration.equalsToken = equalsToken;
+                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                }
+                return addJSDocComment(finishNode(shorthandDeclaration));
+            }
+            else {
+                var propertyAssignment = createNode(253, fullStart);
+                propertyAssignment.modifiers = modifiers;
+                propertyAssignment.name = propertyName;
+                propertyAssignment.questionToken = questionToken;
+                parseExpected(54);
+                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                return addJSDocComment(finishNode(propertyAssignment));
+            }
+        }
+        function parseObjectLiteralExpression() {
+            var node = createNode(171);
+            parseExpected(15);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.properties = parseDelimitedList(12, parseObjectLiteralElement, true);
+            parseExpected(16);
+            return finishNode(node);
+        }
+        function parseFunctionExpression() {
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(false);
+            }
+            var node = createNode(179);
+            setModifiers(node, parseModifiers());
+            parseExpected(87);
+            node.asteriskToken = parseOptionalToken(37);
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = !!(node.flags & 256);
+            node.name =
+                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
+                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
+                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
+                            parseOptionalIdentifier();
+            fillSignature(54, isGenerator, isAsync, false, node);
+            node.body = parseFunctionBlock(isGenerator, isAsync, false);
+            if (saveDecoratorContext) {
+                setDecoratorContext(true);
+            }
+            return addJSDocComment(finishNode(node));
+        }
+        function parseOptionalIdentifier() {
+            return isIdentifier() ? parseIdentifier() : undefined;
+        }
+        function parseNewExpression() {
+            var node = createNode(175);
+            parseExpected(92);
+            node.expression = parseMemberExpressionOrHigher();
+            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
+            if (node.typeArguments || token === 17) {
+                node.arguments = parseArgumentList();
+            }
+            return finishNode(node);
+        }
+        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
+            var node = createNode(199);
+            if (parseExpected(15, diagnosticMessage) || ignoreMissingOpenBrace) {
+                node.statements = parseList(1, parseStatement);
+                parseExpected(16);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
+            var savedYieldContext = inYieldContext();
+            setYieldContext(allowYield);
+            var savedAwaitContext = inAwaitContext();
+            setAwaitContext(allowAwait);
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(false);
+            }
+            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
+            if (saveDecoratorContext) {
+                setDecoratorContext(true);
+            }
+            setYieldContext(savedYieldContext);
+            setAwaitContext(savedAwaitContext);
+            return block;
+        }
+        function parseEmptyStatement() {
+            var node = createNode(201);
+            parseExpected(23);
+            return finishNode(node);
+        }
+        function parseIfStatement() {
+            var node = createNode(203);
+            parseExpected(88);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            node.thenStatement = parseStatement();
+            node.elseStatement = parseOptional(80) ? parseStatement() : undefined;
+            return finishNode(node);
+        }
+        function parseDoStatement() {
+            var node = createNode(204);
+            parseExpected(79);
+            node.statement = parseStatement();
+            parseExpected(104);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            parseOptional(23);
+            return finishNode(node);
+        }
+        function parseWhileStatement() {
+            var node = createNode(205);
+            parseExpected(104);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            node.statement = parseStatement();
+            return finishNode(node);
+        }
+        function parseForOrForInOrForOfStatement() {
+            var pos = getNodePos();
+            parseExpected(86);
+            parseExpected(17);
+            var initializer = undefined;
+            if (token !== 23) {
+                if (token === 102 || token === 108 || token === 74) {
+                    initializer = parseVariableDeclarationList(true);
+                }
+                else {
+                    initializer = disallowInAnd(parseExpression);
+                }
+            }
+            var forOrForInOrForOfStatement;
+            if (parseOptional(90)) {
+                var forInStatement = createNode(207, pos);
+                forInStatement.initializer = initializer;
+                forInStatement.expression = allowInAnd(parseExpression);
+                parseExpected(18);
+                forOrForInOrForOfStatement = forInStatement;
+            }
+            else if (parseOptional(138)) {
+                var forOfStatement = createNode(208, pos);
+                forOfStatement.initializer = initializer;
+                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
+                parseExpected(18);
+                forOrForInOrForOfStatement = forOfStatement;
+            }
+            else {
+                var forStatement = createNode(206, pos);
+                forStatement.initializer = initializer;
+                parseExpected(23);
+                if (token !== 23 && token !== 18) {
+                    forStatement.condition = allowInAnd(parseExpression);
+                }
+                parseExpected(23);
+                if (token !== 18) {
+                    forStatement.incrementor = allowInAnd(parseExpression);
+                }
+                parseExpected(18);
+                forOrForInOrForOfStatement = forStatement;
+            }
+            forOrForInOrForOfStatement.statement = parseStatement();
+            return finishNode(forOrForInOrForOfStatement);
+        }
+        function parseBreakOrContinueStatement(kind) {
+            var node = createNode(kind);
+            parseExpected(kind === 210 ? 70 : 75);
+            if (!canParseSemicolon()) {
+                node.label = parseIdentifier();
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseReturnStatement() {
+            var node = createNode(211);
+            parseExpected(94);
+            if (!canParseSemicolon()) {
+                node.expression = allowInAnd(parseExpression);
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseWithStatement() {
+            var node = createNode(212);
+            parseExpected(105);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            node.statement = parseStatement();
+            return finishNode(node);
+        }
+        function parseCaseClause() {
+            var node = createNode(249);
+            parseExpected(71);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(54);
+            node.statements = parseList(3, parseStatement);
+            return finishNode(node);
+        }
+        function parseDefaultClause() {
+            var node = createNode(250);
+            parseExpected(77);
+            parseExpected(54);
+            node.statements = parseList(3, parseStatement);
+            return finishNode(node);
+        }
+        function parseCaseOrDefaultClause() {
+            return token === 71 ? parseCaseClause() : parseDefaultClause();
+        }
+        function parseSwitchStatement() {
+            var node = createNode(213);
+            parseExpected(96);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            var caseBlock = createNode(227, scanner.getStartPos());
+            parseExpected(15);
+            caseBlock.clauses = parseList(2, parseCaseOrDefaultClause);
+            parseExpected(16);
+            node.caseBlock = finishNode(caseBlock);
+            return finishNode(node);
+        }
+        function parseThrowStatement() {
+            var node = createNode(215);
+            parseExpected(98);
+            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseTryStatement() {
+            var node = createNode(216);
+            parseExpected(100);
+            node.tryBlock = parseBlock(false);
+            node.catchClause = token === 72 ? parseCatchClause() : undefined;
+            if (!node.catchClause || token === 85) {
+                parseExpected(85);
+                node.finallyBlock = parseBlock(false);
+            }
+            return finishNode(node);
+        }
+        function parseCatchClause() {
+            var result = createNode(252);
+            parseExpected(72);
+            if (parseExpected(17)) {
+                result.variableDeclaration = parseVariableDeclaration();
+            }
+            parseExpected(18);
+            result.block = parseBlock(false);
+            return finishNode(result);
+        }
+        function parseDebuggerStatement() {
+            var node = createNode(217);
+            parseExpected(76);
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseExpressionOrLabeledStatement() {
+            var fullStart = scanner.getStartPos();
+            var expression = allowInAnd(parseExpression);
+            if (expression.kind === 69 && parseOptional(54)) {
+                var labeledStatement = createNode(214, fullStart);
+                labeledStatement.label = expression;
+                labeledStatement.statement = parseStatement();
+                return addJSDocComment(finishNode(labeledStatement));
+            }
+            else {
+                var expressionStatement = createNode(202, fullStart);
+                expressionStatement.expression = expression;
+                parseSemicolon();
+                return addJSDocComment(finishNode(expressionStatement));
+            }
+        }
+        function nextTokenIsIdentifierOrKeywordOnSameLine() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token) && !scanner.hasPrecedingLineBreak();
+        }
+        function nextTokenIsFunctionKeywordOnSameLine() {
+            nextToken();
+            return token === 87 && !scanner.hasPrecedingLineBreak();
+        }
+        function nextTokenIsIdentifierOrKeywordOrNumberOnSameLine() {
+            nextToken();
+            return (ts.tokenIsIdentifierOrKeyword(token) || token === 8) && !scanner.hasPrecedingLineBreak();
+        }
+        function isDeclaration() {
+            while (true) {
+                switch (token) {
+                    case 102:
+                    case 108:
+                    case 74:
+                    case 87:
+                    case 73:
+                    case 81:
+                        return true;
+                    case 107:
+                    case 134:
+                        return nextTokenIsIdentifierOnSameLine();
+                    case 125:
+                    case 126:
+                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
+                    case 115:
+                    case 118:
+                    case 122:
+                    case 110:
+                    case 111:
+                    case 112:
+                    case 128:
+                        nextToken();
+                        if (scanner.hasPrecedingLineBreak()) {
+                            return false;
+                        }
+                        continue;
+                    case 137:
+                        nextToken();
+                        return token === 15 || token === 69 || token === 82;
+                    case 89:
+                        nextToken();
+                        return token === 9 || token === 37 ||
+                            token === 15 || ts.tokenIsIdentifierOrKeyword(token);
+                    case 82:
+                        nextToken();
+                        if (token === 56 || token === 37 ||
+                            token === 15 || token === 77 ||
+                            token === 116) {
+                            return true;
+                        }
+                        continue;
+                    case 113:
+                        nextToken();
+                        continue;
+                    default:
+                        return false;
+                }
+            }
+        }
+        function isStartOfDeclaration() {
+            return lookAhead(isDeclaration);
+        }
+        function isStartOfStatement() {
+            switch (token) {
+                case 55:
+                case 23:
+                case 15:
+                case 102:
+                case 108:
+                case 87:
+                case 73:
+                case 81:
+                case 88:
+                case 79:
+                case 104:
+                case 86:
+                case 75:
+                case 70:
+                case 94:
+                case 105:
+                case 96:
+                case 98:
+                case 100:
+                case 76:
+                case 72:
+                case 85:
+                    return true;
+                case 74:
+                case 82:
+                case 89:
+                    return isStartOfDeclaration();
+                case 118:
+                case 122:
+                case 107:
+                case 125:
+                case 126:
+                case 134:
+                case 137:
+                    return true;
+                case 112:
+                case 110:
+                case 111:
+                case 113:
+                case 128:
+                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                default:
+                    return isStartOfExpression();
+            }
+        }
+        function nextTokenIsIdentifierOrStartOfDestructuring() {
+            nextToken();
+            return isIdentifier() || token === 15 || token === 19;
+        }
+        function isLetDeclaration() {
+            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
+        }
+        function parseStatement() {
+            switch (token) {
+                case 23:
+                    return parseEmptyStatement();
+                case 15:
+                    return parseBlock(false);
+                case 102:
+                    return parseVariableStatement(scanner.getStartPos(), undefined, undefined);
+                case 108:
+                    if (isLetDeclaration()) {
+                        return parseVariableStatement(scanner.getStartPos(), undefined, undefined);
+                    }
+                    break;
+                case 87:
+                    return parseFunctionDeclaration(scanner.getStartPos(), undefined, undefined);
+                case 73:
+                    return parseClassDeclaration(scanner.getStartPos(), undefined, undefined);
+                case 88:
+                    return parseIfStatement();
+                case 79:
+                    return parseDoStatement();
+                case 104:
+                    return parseWhileStatement();
+                case 86:
+                    return parseForOrForInOrForOfStatement();
+                case 75:
+                    return parseBreakOrContinueStatement(209);
+                case 70:
+                    return parseBreakOrContinueStatement(210);
+                case 94:
+                    return parseReturnStatement();
+                case 105:
+                    return parseWithStatement();
+                case 96:
+                    return parseSwitchStatement();
+                case 98:
+                    return parseThrowStatement();
+                case 100:
+                case 72:
+                case 85:
+                    return parseTryStatement();
+                case 76:
+                    return parseDebuggerStatement();
+                case 55:
+                    return parseDeclaration();
+                case 118:
+                case 107:
+                case 134:
+                case 125:
+                case 126:
+                case 122:
+                case 74:
+                case 81:
+                case 82:
+                case 89:
+                case 110:
+                case 111:
+                case 112:
+                case 115:
+                case 113:
+                case 128:
+                case 137:
+                    if (isStartOfDeclaration()) {
+                        return parseDeclaration();
+                    }
+                    break;
+            }
+            return parseExpressionOrLabeledStatement();
+        }
+        function parseDeclaration() {
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            switch (token) {
+                case 102:
+                case 108:
+                case 74:
+                    return parseVariableStatement(fullStart, decorators, modifiers);
+                case 87:
+                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
+                case 73:
+                    return parseClassDeclaration(fullStart, decorators, modifiers);
+                case 107:
+                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
+                case 134:
+                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
+                case 81:
+                    return parseEnumDeclaration(fullStart, decorators, modifiers);
+                case 137:
+                case 125:
+                case 126:
+                    return parseModuleDeclaration(fullStart, decorators, modifiers);
+                case 89:
+                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
+                case 82:
+                    nextToken();
+                    switch (token) {
+                        case 77:
+                        case 56:
+                            return parseExportAssignment(fullStart, decorators, modifiers);
+                        case 116:
+                            return parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers);
+                        default:
+                            return parseExportDeclaration(fullStart, decorators, modifiers);
+                    }
+                default:
+                    if (decorators || modifiers) {
+                        var node = createMissingNode(239, true, ts.Diagnostics.Declaration_expected);
+                        node.pos = fullStart;
+                        node.decorators = decorators;
+                        setModifiers(node, modifiers);
+                        return finishNode(node);
+                    }
+            }
+        }
+        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token === 9);
+        }
+        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
+            if (token !== 15 && canParseSemicolon()) {
+                parseSemicolon();
+                return;
+            }
+            return parseFunctionBlock(isGenerator, isAsync, false, diagnosticMessage);
+        }
+        function parseArrayBindingElement() {
+            if (token === 24) {
+                return createNode(193);
+            }
+            var node = createNode(169);
+            node.dotDotDotToken = parseOptionalToken(22);
+            node.name = parseIdentifierOrPattern();
+            node.initializer = parseBindingElementInitializer(false);
+            return finishNode(node);
+        }
+        function parseObjectBindingElement() {
+            var node = createNode(169);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            if (tokenIsIdentifier && token !== 54) {
+                node.name = propertyName;
+            }
+            else {
+                parseExpected(54);
+                node.propertyName = propertyName;
+                node.name = parseIdentifierOrPattern();
+            }
+            node.initializer = parseBindingElementInitializer(false);
+            return finishNode(node);
+        }
+        function parseObjectBindingPattern() {
+            var node = createNode(167);
+            parseExpected(15);
+            node.elements = parseDelimitedList(9, parseObjectBindingElement);
+            parseExpected(16);
+            return finishNode(node);
+        }
+        function parseArrayBindingPattern() {
+            var node = createNode(168);
+            parseExpected(19);
+            node.elements = parseDelimitedList(10, parseArrayBindingElement);
+            parseExpected(20);
+            return finishNode(node);
+        }
+        function isIdentifierOrPattern() {
+            return token === 15 || token === 19 || isIdentifier();
+        }
+        function parseIdentifierOrPattern() {
+            if (token === 19) {
+                return parseArrayBindingPattern();
+            }
+            if (token === 15) {
+                return parseObjectBindingPattern();
+            }
+            return parseIdentifier();
+        }
+        function parseVariableDeclaration() {
+            var node = createNode(218);
+            node.name = parseIdentifierOrPattern();
+            node.type = parseTypeAnnotation();
+            if (!isInOrOfKeyword(token)) {
+                node.initializer = parseInitializer(false);
+            }
+            return finishNode(node);
+        }
+        function parseVariableDeclarationList(inForStatementInitializer) {
+            var node = createNode(219);
+            switch (token) {
+                case 102:
+                    break;
+                case 108:
+                    node.flags |= 1024;
+                    break;
+                case 74:
+                    node.flags |= 2048;
+                    break;
+                default:
+                    ts.Debug.fail();
+            }
+            nextToken();
+            if (token === 138 && lookAhead(canFollowContextualOfKeyword)) {
+                node.declarations = createMissingList();
+            }
+            else {
+                var savedDisallowIn = inDisallowInContext();
+                setDisallowInContext(inForStatementInitializer);
+                node.declarations = parseDelimitedList(8, parseVariableDeclaration);
+                setDisallowInContext(savedDisallowIn);
+            }
+            return finishNode(node);
+        }
+        function canFollowContextualOfKeyword() {
+            return nextTokenIsIdentifier() && nextToken() === 18;
+        }
+        function parseVariableStatement(fullStart, decorators, modifiers) {
+            var node = createNode(200, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.declarationList = parseVariableDeclarationList(false);
+            parseSemicolon();
+            return addJSDocComment(finishNode(node));
+        }
+        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(220, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(87);
+            node.asteriskToken = parseOptionalToken(37);
+            node.name = node.flags & 512 ? parseOptionalIdentifier() : parseIdentifier();
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = !!(node.flags & 256);
+            fillSignature(54, isGenerator, isAsync, false, node);
+            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseConstructorDeclaration(pos, decorators, modifiers) {
+            var node = createNode(148, pos);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(121);
+            fillSignature(54, false, false, false, node);
+            node.body = parseFunctionBlockOrSemicolon(false, false, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
+            var method = createNode(147, fullStart);
+            method.decorators = decorators;
+            setModifiers(method, modifiers);
+            method.asteriskToken = asteriskToken;
+            method.name = name;
+            method.questionToken = questionToken;
+            var isGenerator = !!asteriskToken;
+            var isAsync = !!(method.flags & 256);
+            fillSignature(54, isGenerator, isAsync, false, method);
+            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
+            return addJSDocComment(finishNode(method));
+        }
+        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
+            var property = createNode(145, fullStart);
+            property.decorators = decorators;
+            setModifiers(property, modifiers);
+            property.name = name;
+            property.questionToken = questionToken;
+            property.type = parseTypeAnnotation();
+            property.initializer = modifiers && modifiers.flags & 32
+                ? allowInAnd(parseNonParameterInitializer)
+                : doOutsideOfContext(8388608 | 4194304, parseNonParameterInitializer);
+            parseSemicolon();
+            return finishNode(property);
+        }
+        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
+            var asteriskToken = parseOptionalToken(37);
+            var name = parsePropertyName();
+            var questionToken = parseOptionalToken(53);
+            if (asteriskToken || token === 17 || token === 25) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
+            }
+            else {
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
+            }
+        }
+        function parseNonParameterInitializer() {
+            return parseInitializer(false);
+        }
+        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.name = parsePropertyName();
+            fillSignature(54, false, false, false, node);
+            node.body = parseFunctionBlockOrSemicolon(false, false);
+            return finishNode(node);
+        }
+        function isClassMemberModifier(idToken) {
+            switch (idToken) {
+                case 112:
+                case 110:
+                case 111:
+                case 113:
+                case 128:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isClassMemberStart() {
+            var idToken;
+            if (token === 55) {
+                return true;
+            }
+            while (ts.isModifierKind(token)) {
+                idToken = token;
+                if (isClassMemberModifier(idToken)) {
+                    return true;
+                }
+                nextToken();
+            }
+            if (token === 37) {
+                return true;
+            }
+            if (isLiteralPropertyName()) {
+                idToken = token;
+                nextToken();
+            }
+            if (token === 19) {
+                return true;
+            }
+            if (idToken !== undefined) {
+                if (!ts.isKeyword(idToken) || idToken === 131 || idToken === 123) {
+                    return true;
+                }
+                switch (token) {
+                    case 17:
+                    case 25:
+                    case 54:
+                    case 56:
+                    case 53:
+                        return true;
+                    default:
+                        return canParseSemicolon();
+                }
+            }
+            return false;
+        }
+        function parseDecorators() {
+            var decorators;
+            while (true) {
+                var decoratorStart = getNodePos();
+                if (!parseOptional(55)) {
+                    break;
+                }
+                if (!decorators) {
+                    decorators = [];
+                    decorators.pos = decoratorStart;
+                }
+                var decorator = createNode(143, decoratorStart);
+                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
+                decorators.push(finishNode(decorator));
+            }
+            if (decorators) {
+                decorators.end = getNodeEnd();
+            }
+            return decorators;
+        }
+        function parseModifiers(permitInvalidConstAsModifier) {
+            var flags = 0;
+            var modifiers;
+            while (true) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token;
+                if (token === 74 && permitInvalidConstAsModifier) {
+                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
+                        break;
+                    }
+                }
+                else {
+                    if (!parseAnyContextualModifier()) {
+                        break;
+                    }
+                }
+                if (!modifiers) {
+                    modifiers = [];
+                    modifiers.pos = modifierStart;
+                }
+                flags |= ts.modifierToFlag(modifierKind);
+                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
+            }
+            if (modifiers) {
+                modifiers.flags = flags;
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
+        }
+        function parseModifiersForArrowFunction() {
+            var flags = 0;
+            var modifiers;
+            if (token === 118) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token;
+                nextToken();
+                modifiers = [];
+                modifiers.pos = modifierStart;
+                flags |= ts.modifierToFlag(modifierKind);
+                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
+                modifiers.flags = flags;
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
+        }
+        function parseClassElement() {
+            if (token === 23) {
+                var result = createNode(198);
+                nextToken();
+                return finishNode(result);
+            }
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers(true);
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
+            }
+            if (token === 121) {
+                return parseConstructorDeclaration(fullStart, decorators, modifiers);
+            }
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
+            }
+            if (ts.tokenIsIdentifierOrKeyword(token) ||
+                token === 9 ||
+                token === 8 ||
+                token === 37 ||
+                token === 19) {
+                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
+            }
+            if (decorators || modifiers) {
+                var name_7 = createMissingNode(69, true, ts.Diagnostics.Declaration_expected);
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_7, undefined);
+            }
+            ts.Debug.fail("Should not have attempted to parse class member declaration.");
+        }
+        function parseClassExpression() {
+            return parseClassDeclarationOrExpression(scanner.getStartPos(), undefined, undefined, 192);
+        }
+        function parseClassDeclaration(fullStart, decorators, modifiers) {
+            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 221);
+        }
+        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(73);
+            node.name = parseNameOfClassDeclarationOrExpression();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses(true);
+            if (parseExpected(15)) {
+                node.members = parseClassMembers();
+                parseExpected(16);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseNameOfClassDeclarationOrExpression() {
+            return isIdentifier() && !isImplementsClause()
+                ? parseIdentifier()
+                : undefined;
+        }
+        function isImplementsClause() {
+            return token === 106 && lookAhead(nextTokenIsIdentifierOrKeyword);
+        }
+        function parseHeritageClauses(isClassHeritageClause) {
+            if (isHeritageClause()) {
+                return parseList(20, parseHeritageClause);
+            }
+            return undefined;
+        }
+        function parseHeritageClause() {
+            if (token === 83 || token === 106) {
+                var node = createNode(251);
+                node.token = token;
+                nextToken();
+                node.types = parseDelimitedList(7, parseExpressionWithTypeArguments);
+                return finishNode(node);
+            }
+            return undefined;
+        }
+        function parseExpressionWithTypeArguments() {
+            var node = createNode(194);
+            node.expression = parseLeftHandSideExpressionOrHigher();
+            if (token === 25) {
+                node.typeArguments = parseBracketedList(18, parseType, 25, 27);
+            }
+            return finishNode(node);
+        }
+        function isHeritageClause() {
+            return token === 83 || token === 106;
+        }
+        function parseClassMembers() {
+            return parseList(5, parseClassElement);
+        }
+        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(222, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(107);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses(false);
+            node.members = parseObjectTypeMembers();
+            return finishNode(node);
+        }
+        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(223, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(134);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            parseExpected(56);
+            node.type = parseType();
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseEnumMember() {
+            var node = createNode(255, scanner.getStartPos());
+            node.name = parsePropertyName();
+            node.initializer = allowInAnd(parseNonParameterInitializer);
+            return finishNode(node);
+        }
+        function parseEnumDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(224, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(81);
+            node.name = parseIdentifier();
+            if (parseExpected(15)) {
+                node.members = parseDelimitedList(6, parseEnumMember);
+                parseExpected(16);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseModuleBlock() {
+            var node = createNode(226, scanner.getStartPos());
+            if (parseExpected(15)) {
+                node.statements = parseList(1, parseStatement);
+                parseExpected(16);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
+            var node = createNode(225, fullStart);
+            var namespaceFlag = flags & 4096;
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.flags |= flags;
+            node.name = parseIdentifier();
+            node.body = parseOptional(21)
+                ? parseModuleOrNamespaceDeclaration(getNodePos(), undefined, undefined, 1 | namespaceFlag)
+                : parseModuleBlock();
+            return finishNode(node);
+        }
+        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(225, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (token === 137) {
+                node.name = parseIdentifier();
+                node.flags |= 131072;
+            }
+            else {
+                node.name = parseLiteralNode(true);
+            }
+            node.body = parseModuleBlock();
+            return finishNode(node);
+        }
+        function parseModuleDeclaration(fullStart, decorators, modifiers) {
+            var flags = modifiers ? modifiers.flags : 0;
+            if (token === 137) {
+                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+            }
+            else if (parseOptional(126)) {
+                flags |= 4096;
+            }
+            else {
+                parseExpected(125);
+                if (token === 9) {
+                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+                }
+            }
+            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
+        }
+        function isExternalModuleReference() {
+            return token === 129 &&
+                lookAhead(nextTokenIsOpenParen);
+        }
+        function nextTokenIsOpenParen() {
+            return nextToken() === 17;
+        }
+        function nextTokenIsSlash() {
+            return nextToken() === 39;
+        }
+        function parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers) {
+            var exportDeclaration = createNode(228, fullStart);
+            exportDeclaration.decorators = decorators;
+            exportDeclaration.modifiers = modifiers;
+            parseExpected(116);
+            parseExpected(126);
+            exportDeclaration.name = parseIdentifier();
+            parseExpected(23);
+            return finishNode(exportDeclaration);
+        }
+        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
+            parseExpected(89);
+            var afterImportPos = scanner.getStartPos();
+            var identifier;
+            if (isIdentifier()) {
+                identifier = parseIdentifier();
+                if (token !== 24 && token !== 136) {
+                    var importEqualsDeclaration = createNode(229, fullStart);
+                    importEqualsDeclaration.decorators = decorators;
+                    setModifiers(importEqualsDeclaration, modifiers);
+                    importEqualsDeclaration.name = identifier;
+                    parseExpected(56);
+                    importEqualsDeclaration.moduleReference = parseModuleReference();
+                    parseSemicolon();
+                    return finishNode(importEqualsDeclaration);
+                }
+            }
+            var importDeclaration = createNode(230, fullStart);
+            importDeclaration.decorators = decorators;
+            setModifiers(importDeclaration, modifiers);
+            if (identifier ||
+                token === 37 ||
+                token === 15) {
+                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
+                parseExpected(136);
+            }
+            importDeclaration.moduleSpecifier = parseModuleSpecifier();
+            parseSemicolon();
+            return finishNode(importDeclaration);
+        }
+        function parseImportClause(identifier, fullStart) {
+            var importClause = createNode(231, fullStart);
+            if (identifier) {
+                importClause.name = identifier;
+            }
+            if (!importClause.name ||
+                parseOptional(24)) {
+                importClause.namedBindings = token === 37 ? parseNamespaceImport() : parseNamedImportsOrExports(233);
+            }
+            return finishNode(importClause);
+        }
+        function parseModuleReference() {
+            return isExternalModuleReference()
+                ? parseExternalModuleReference()
+                : parseEntityName(false);
+        }
+        function parseExternalModuleReference() {
+            var node = createNode(240);
+            parseExpected(129);
+            parseExpected(17);
+            node.expression = parseModuleSpecifier();
+            parseExpected(18);
+            return finishNode(node);
+        }
+        function parseModuleSpecifier() {
+            if (token === 9) {
+                var result = parseLiteralNode();
+                internIdentifier(result.text);
+                return result;
+            }
+            else {
+                return parseExpression();
+            }
+        }
+        function parseNamespaceImport() {
+            var namespaceImport = createNode(232);
+            parseExpected(37);
+            parseExpected(116);
+            namespaceImport.name = parseIdentifier();
+            return finishNode(namespaceImport);
+        }
+        function parseNamedImportsOrExports(kind) {
+            var node = createNode(kind);
+            node.elements = parseBracketedList(21, kind === 233 ? parseImportSpecifier : parseExportSpecifier, 15, 16);
+            return finishNode(node);
+        }
+        function parseExportSpecifier() {
+            return parseImportOrExportSpecifier(238);
+        }
+        function parseImportSpecifier() {
+            return parseImportOrExportSpecifier(234);
+        }
+        function parseImportOrExportSpecifier(kind) {
+            var node = createNode(kind);
+            var checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
+            var checkIdentifierStart = scanner.getTokenPos();
+            var checkIdentifierEnd = scanner.getTextPos();
+            var identifierName = parseIdentifierName();
+            if (token === 116) {
+                node.propertyName = identifierName;
+                parseExpected(116);
+                checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
+                checkIdentifierStart = scanner.getTokenPos();
+                checkIdentifierEnd = scanner.getTextPos();
+                node.name = parseIdentifierName();
+            }
+            else {
+                node.name = identifierName;
+            }
+            if (kind === 234 && checkIdentifierIsKeyword) {
+                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
+            }
+            return finishNode(node);
+        }
+        function parseExportDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(236, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (parseOptional(37)) {
+                parseExpected(136);
+                node.moduleSpecifier = parseModuleSpecifier();
+            }
+            else {
+                node.exportClause = parseNamedImportsOrExports(237);
+                if (token === 136 || (token === 9 && !scanner.hasPrecedingLineBreak())) {
+                    parseExpected(136);
+                    node.moduleSpecifier = parseModuleSpecifier();
+                }
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseExportAssignment(fullStart, decorators, modifiers) {
+            var node = createNode(235, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (parseOptional(56)) {
+                node.isExportEquals = true;
+            }
+            else {
+                parseExpected(77);
+            }
+            node.expression = parseAssignmentExpressionOrHigher();
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function processReferenceComments(sourceFile) {
+            var triviaScanner = ts.createScanner(sourceFile.languageVersion, false, 0, sourceText);
+            var referencedFiles = [];
+            var typeReferenceDirectives = [];
+            var amdDependencies = [];
+            var amdModuleName;
+            while (true) {
+                var kind = triviaScanner.scan();
+                if (kind !== 2) {
+                    if (ts.isTrivia(kind)) {
+                        continue;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                var range = { pos: triviaScanner.getTokenPos(), end: triviaScanner.getTextPos(), kind: triviaScanner.getToken() };
+                var comment = sourceText.substring(range.pos, range.end);
+                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
+                if (referencePathMatchResult) {
+                    var fileReference = referencePathMatchResult.fileReference;
+                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
+                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
+                    if (fileReference) {
+                        if (referencePathMatchResult.isTypeReferenceDirective) {
+                            typeReferenceDirectives.push(fileReference);
+                        }
+                        else {
+                            referencedFiles.push(fileReference);
+                        }
+                    }
+                    if (diagnosticMessage) {
+                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
+                    }
+                }
+                else {
+                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
+                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
+                    if (amdModuleNameMatchResult) {
+                        if (amdModuleName) {
+                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
+                        }
+                        amdModuleName = amdModuleNameMatchResult[2];
+                    }
+                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
+                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
+                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
+                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
+                    if (amdDependencyMatchResult) {
+                        var pathMatchResult = pathRegex.exec(comment);
+                        var nameMatchResult = nameRegex.exec(comment);
+                        if (pathMatchResult) {
+                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
+                            amdDependencies.push(amdDependency);
+                        }
+                    }
+                }
+            }
+            sourceFile.referencedFiles = referencedFiles;
+            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
+            sourceFile.amdDependencies = amdDependencies;
+            sourceFile.moduleName = amdModuleName;
+        }
+        function setExternalModuleIndicator(sourceFile) {
+            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
+                return node.flags & 1
+                    || node.kind === 229 && node.moduleReference.kind === 240
+                    || node.kind === 230
+                    || node.kind === 235
+                    || node.kind === 236
+                    ? node
+                    : undefined;
+            });
+        }
+        var JSDocParser;
+        (function (JSDocParser) {
+            function isJSDocType() {
+                switch (token) {
+                    case 37:
+                    case 53:
+                    case 17:
+                    case 19:
+                    case 49:
+                    case 15:
+                    case 87:
+                    case 22:
+                    case 92:
+                    case 97:
+                        return true;
+                }
+                return ts.tokenIsIdentifierOrKeyword(token);
+            }
+            JSDocParser.isJSDocType = isJSDocType;
+            function parseJSDocTypeExpressionForTests(content, start, length) {
+                initializeState("file.js", content, 2, undefined, 1);
+                scanner.setText(content, start, length);
+                token = scanner.scan();
+                var jsDocTypeExpression = parseJSDocTypeExpression();
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+            function parseJSDocTypeExpression() {
+                var result = createNode(257, scanner.getTokenPos());
+                parseExpected(15);
+                result.type = parseJSDocTopLevelType();
+                parseExpected(16);
+                fixupParentReferences(result);
+                return finishNode(result);
+            }
+            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
+            function parseJSDocTopLevelType() {
+                var type = parseJSDocType();
+                if (token === 47) {
+                    var unionType = createNode(261, type.pos);
+                    unionType.types = parseJSDocTypeList(type);
+                    type = finishNode(unionType);
+                }
+                if (token === 56) {
+                    var optionalType = createNode(268, type.pos);
+                    nextToken();
+                    optionalType.type = type;
+                    type = finishNode(optionalType);
+                }
+                return type;
+            }
+            function parseJSDocType() {
+                var type = parseBasicTypeExpression();
+                while (true) {
+                    if (token === 19) {
+                        var arrayType = createNode(260, type.pos);
+                        arrayType.elementType = type;
+                        nextToken();
+                        parseExpected(20);
+                        type = finishNode(arrayType);
+                    }
+                    else if (token === 53) {
+                        var nullableType = createNode(263, type.pos);
+                        nullableType.type = type;
+                        nextToken();
+                        type = finishNode(nullableType);
+                    }
+                    else if (token === 49) {
+                        var nonNullableType = createNode(264, type.pos);
+                        nonNullableType.type = type;
+                        nextToken();
+                        type = finishNode(nonNullableType);
+                    }
+                    else {
+                        break;
+                    }
+                }
+                return type;
+            }
+            function parseBasicTypeExpression() {
+                switch (token) {
+                    case 37:
+                        return parseJSDocAllType();
+                    case 53:
+                        return parseJSDocUnknownOrNullableType();
+                    case 17:
+                        return parseJSDocUnionType();
+                    case 19:
+                        return parseJSDocTupleType();
+                    case 49:
+                        return parseJSDocNonNullableType();
+                    case 15:
+                        return parseJSDocRecordType();
+                    case 87:
+                        return parseJSDocFunctionType();
+                    case 22:
+                        return parseJSDocVariadicType();
+                    case 92:
+                        return parseJSDocConstructorType();
+                    case 97:
+                        return parseJSDocThisType();
+                    case 117:
+                    case 132:
+                    case 130:
+                    case 120:
+                    case 133:
+                    case 103:
+                        return parseTokenNode();
+                }
+                return parseJSDocTypeReference();
+            }
+            function parseJSDocThisType() {
+                var result = createNode(272);
+                nextToken();
+                parseExpected(54);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocConstructorType() {
+                var result = createNode(271);
+                nextToken();
+                parseExpected(54);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocVariadicType() {
+                var result = createNode(270);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocFunctionType() {
+                var result = createNode(269);
+                nextToken();
+                parseExpected(17);
+                result.parameters = parseDelimitedList(22, parseJSDocParameter);
+                checkForTrailingComma(result.parameters);
+                parseExpected(18);
+                if (token === 54) {
+                    nextToken();
+                    result.type = parseJSDocType();
+                }
+                return finishNode(result);
+            }
+            function parseJSDocParameter() {
+                var parameter = createNode(142);
+                parameter.type = parseJSDocType();
+                if (parseOptional(56)) {
+                    parameter.questionToken = createNode(56);
+                }
+                return finishNode(parameter);
+            }
+            function parseJSDocTypeReference() {
+                var result = createNode(267);
+                result.name = parseSimplePropertyName();
+                if (token === 25) {
+                    result.typeArguments = parseTypeArguments();
+                }
+                else {
+                    while (parseOptional(21)) {
+                        if (token === 25) {
+                            result.typeArguments = parseTypeArguments();
+                            break;
+                        }
+                        else {
+                            result.name = parseQualifiedName(result.name);
+                        }
+                    }
+                }
+                return finishNode(result);
+            }
+            function parseTypeArguments() {
+                nextToken();
+                var typeArguments = parseDelimitedList(23, parseJSDocType);
+                checkForTrailingComma(typeArguments);
+                checkForEmptyTypeArgumentList(typeArguments);
+                parseExpected(27);
+                return typeArguments;
+            }
+            function checkForEmptyTypeArgumentList(typeArguments) {
+                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
+                    var start = typeArguments.pos - "<".length;
+                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
+                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+                }
+            }
+            function parseQualifiedName(left) {
+                var result = createNode(139, left.pos);
+                result.left = left;
+                result.right = parseIdentifierName();
+                return finishNode(result);
+            }
+            function parseJSDocRecordType() {
+                var result = createNode(265);
+                nextToken();
+                result.members = parseDelimitedList(24, parseJSDocRecordMember);
+                checkForTrailingComma(result.members);
+                parseExpected(16);
+                return finishNode(result);
+            }
+            function parseJSDocRecordMember() {
+                var result = createNode(266);
+                result.name = parseSimplePropertyName();
+                if (token === 54) {
+                    nextToken();
+                    result.type = parseJSDocType();
+                }
+                return finishNode(result);
+            }
+            function parseJSDocNonNullableType() {
+                var result = createNode(264);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocTupleType() {
+                var result = createNode(262);
+                nextToken();
+                result.types = parseDelimitedList(25, parseJSDocType);
+                checkForTrailingComma(result.types);
+                parseExpected(20);
+                return finishNode(result);
+            }
+            function checkForTrailingComma(list) {
+                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
+                    var start = list.end - ",".length;
+                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
+                }
+            }
+            function parseJSDocUnionType() {
+                var result = createNode(261);
+                nextToken();
+                result.types = parseJSDocTypeList(parseJSDocType());
+                parseExpected(18);
+                return finishNode(result);
+            }
+            function parseJSDocTypeList(firstType) {
+                ts.Debug.assert(!!firstType);
+                var types = [];
+                types.pos = firstType.pos;
+                types.push(firstType);
+                while (parseOptional(47)) {
+                    types.push(parseJSDocType());
+                }
+                types.end = scanner.getStartPos();
+                return types;
+            }
+            function parseJSDocAllType() {
+                var result = createNode(258);
+                nextToken();
+                return finishNode(result);
+            }
+            function parseJSDocUnknownOrNullableType() {
+                var pos = scanner.getStartPos();
+                nextToken();
+                if (token === 24 ||
+                    token === 16 ||
+                    token === 18 ||
+                    token === 27 ||
+                    token === 56 ||
+                    token === 47) {
+                    var result = createNode(259, pos);
+                    return finishNode(result);
+                }
+                else {
+                    var result = createNode(263, pos);
+                    result.type = parseJSDocType();
+                    return finishNode(result);
+                }
+            }
+            function parseIsolatedJSDocComment(content, start, length) {
+                initializeState("file.js", content, 2, undefined, 1);
+                sourceFile = { languageVariant: 0, text: content };
+                var jsDocComment = parseJSDocCommentWorker(start, length);
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDocComment ? { jsDocComment: jsDocComment, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+            function parseJSDocComment(parent, start, length) {
+                var saveToken = token;
+                var saveParseDiagnosticsLength = parseDiagnostics.length;
+                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+                var comment = parseJSDocCommentWorker(start, length);
+                if (comment) {
+                    comment.parent = parent;
+                }
+                token = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+                return comment;
+            }
+            JSDocParser.parseJSDocComment = parseJSDocComment;
+            function parseJSDocCommentWorker(start, length) {
+                var content = sourceText;
+                start = start || 0;
+                var end = length === undefined ? content.length : start + length;
+                length = end - start;
+                ts.Debug.assert(start >= 0);
+                ts.Debug.assert(start <= end);
+                ts.Debug.assert(end <= content.length);
+                var tags;
+                var result;
+                if (content.charCodeAt(start) === 47 &&
+                    content.charCodeAt(start + 1) === 42 &&
+                    content.charCodeAt(start + 2) === 42 &&
+                    content.charCodeAt(start + 3) !== 42) {
+                    scanner.scanRange(start + 3, length - 5, function () {
+                        var canParseTag = true;
+                        var seenAsterisk = true;
+                        nextJSDocToken();
+                        while (token !== 1) {
+                            switch (token) {
+                                case 55:
+                                    if (canParseTag) {
+                                        parseTag();
+                                    }
+                                    seenAsterisk = false;
+                                    break;
+                                case 4:
+                                    canParseTag = true;
+                                    seenAsterisk = false;
+                                    break;
+                                case 37:
+                                    if (seenAsterisk) {
+                                        canParseTag = false;
+                                    }
+                                    seenAsterisk = true;
+                                    break;
+                                case 69:
+                                    canParseTag = false;
+                                    break;
+                                case 1:
+                                    break;
+                            }
+                            nextJSDocToken();
+                        }
+                        result = createJSDocComment();
+                    });
+                }
+                return result;
+                function createJSDocComment() {
+                    if (!tags) {
+                        return undefined;
+                    }
+                    var result = createNode(273, start);
+                    result.tags = tags;
+                    return finishNode(result, end);
+                }
+                function skipWhitespace() {
+                    while (token === 5 || token === 4) {
+                        nextJSDocToken();
+                    }
+                }
+                function parseTag() {
+                    ts.Debug.assert(token === 55);
+                    var atToken = createNode(55, scanner.getTokenPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    if (!tagName) {
+                        return;
+                    }
+                    var tag = handleTag(atToken, tagName) || handleUnknownTag(atToken, tagName);
+                    addTag(tag);
+                }
+                function handleTag(atToken, tagName) {
+                    if (tagName) {
+                        switch (tagName.text) {
+                            case "param":
+                                return handleParamTag(atToken, tagName);
+                            case "return":
+                            case "returns":
+                                return handleReturnTag(atToken, tagName);
+                            case "template":
+                                return handleTemplateTag(atToken, tagName);
+                            case "type":
+                                return handleTypeTag(atToken, tagName);
+                            case "typedef":
+                                return handleTypedefTag(atToken, tagName);
+                        }
+                    }
+                    return undefined;
+                }
+                function handleUnknownTag(atToken, tagName) {
+                    var result = createNode(274, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    return finishNode(result);
+                }
+                function addTag(tag) {
+                    if (tag) {
+                        if (!tags) {
+                            tags = [];
+                            tags.pos = tag.pos;
+                        }
+                        tags.push(tag);
+                        tags.end = tag.end;
+                    }
+                }
+                function tryParseTypeExpression() {
+                    if (token !== 15) {
+                        return undefined;
+                    }
+                    var typeExpression = parseJSDocTypeExpression();
+                    return typeExpression;
+                }
+                function handleParamTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var name;
+                    var isBracketed;
+                    if (parseOptionalToken(19)) {
+                        name = parseJSDocIdentifierName();
+                        isBracketed = true;
+                        if (parseOptionalToken(56)) {
+                            parseExpression();
+                        }
+                        parseExpected(20);
+                    }
+                    else if (ts.tokenIsIdentifierOrKeyword(token)) {
+                        name = parseJSDocIdentifierName();
+                    }
+                    if (!name) {
+                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var preName, postName;
+                    if (typeExpression) {
+                        postName = name;
+                    }
+                    else {
+                        preName = name;
+                    }
+                    if (!typeExpression) {
+                        typeExpression = tryParseTypeExpression();
+                    }
+                    var result = createNode(275, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.preParameterName = preName;
+                    result.typeExpression = typeExpression;
+                    result.postParameterName = postName;
+                    result.isBracketed = isBracketed;
+                    return finishNode(result);
+                }
+                function handleReturnTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 276; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(276, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function handleTypeTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 277; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(277, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function handlePropertyTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var name = parseJSDocIdentifierName();
+                    if (!name) {
+                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var result = createNode(280, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.name = name;
+                    result.typeExpression = typeExpression;
+                    return finishNode(result);
+                }
+                function handleTypedefTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var typedefTag = createNode(279, atToken.pos);
+                    typedefTag.atToken = atToken;
+                    typedefTag.tagName = tagName;
+                    typedefTag.name = parseJSDocIdentifierName();
+                    typedefTag.typeExpression = typeExpression;
+                    if (typeExpression) {
+                        if (typeExpression.type.kind === 267) {
+                            var jsDocTypeReference = typeExpression.type;
+                            if (jsDocTypeReference.name.kind === 69) {
+                                var name_8 = jsDocTypeReference.name;
+                                if (name_8.text === "Object") {
+                                    typedefTag.jsDocTypeLiteral = scanChildTags();
+                                }
+                            }
+                        }
+                        if (!typedefTag.jsDocTypeLiteral) {
+                            typedefTag.jsDocTypeLiteral = typeExpression.type;
+                        }
+                    }
+                    else {
+                        typedefTag.jsDocTypeLiteral = scanChildTags();
+                    }
+                    return finishNode(typedefTag);
+                    function scanChildTags() {
+                        var jsDocTypeLiteral = createNode(281, scanner.getStartPos());
+                        var resumePos = scanner.getStartPos();
+                        var canParseTag = true;
+                        var seenAsterisk = false;
+                        var parentTagTerminated = false;
+                        while (token !== 1 && !parentTagTerminated) {
+                            nextJSDocToken();
+                            switch (token) {
+                                case 55:
+                                    if (canParseTag) {
+                                        parentTagTerminated = !tryParseChildTag(jsDocTypeLiteral);
+                                    }
+                                    seenAsterisk = false;
+                                    break;
+                                case 4:
+                                    resumePos = scanner.getStartPos() - 1;
+                                    canParseTag = true;
+                                    seenAsterisk = false;
+                                    break;
+                                case 37:
+                                    if (seenAsterisk) {
+                                        canParseTag = false;
+                                    }
+                                    seenAsterisk = true;
+                                    break;
+                                case 69:
+                                    canParseTag = false;
+                                case 1:
+                                    break;
+                            }
+                        }
+                        scanner.setTextPos(resumePos);
+                        return finishNode(jsDocTypeLiteral);
+                    }
+                }
+                function tryParseChildTag(parentTag) {
+                    ts.Debug.assert(token === 55);
+                    var atToken = createNode(55, scanner.getStartPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    if (!tagName) {
+                        return false;
+                    }
+                    switch (tagName.text) {
+                        case "type":
+                            if (parentTag.jsDocTypeTag) {
+                                return false;
+                            }
+                            parentTag.jsDocTypeTag = handleTypeTag(atToken, tagName);
+                            return true;
+                        case "prop":
+                        case "property":
+                            if (!parentTag.jsDocPropertyTags) {
+                                parentTag.jsDocPropertyTags = [];
+                            }
+                            var propertyTag = handlePropertyTag(atToken, tagName);
+                            parentTag.jsDocPropertyTags.push(propertyTag);
+                            return true;
+                    }
+                    return false;
+                }
+                function handleTemplateTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 278; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var typeParameters = [];
+                    typeParameters.pos = scanner.getStartPos();
+                    while (true) {
+                        var name_9 = parseJSDocIdentifierName();
+                        if (!name_9) {
+                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                            return undefined;
+                        }
+                        var typeParameter = createNode(141, name_9.pos);
+                        typeParameter.name = name_9;
+                        finishNode(typeParameter);
+                        typeParameters.push(typeParameter);
+                        if (token === 24) {
+                            nextJSDocToken();
+                        }
+                        else {
+                            break;
+                        }
+                    }
+                    var result = createNode(278, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeParameters = typeParameters;
+                    finishNode(result);
+                    typeParameters.end = result.end;
+                    return result;
+                }
+                function nextJSDocToken() {
+                    return token = scanner.scanJSDocToken();
+                }
+                function parseJSDocIdentifierName() {
+                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token));
+                }
+                function createJSDocIdentifier(isIdentifier) {
+                    if (!isIdentifier) {
+                        parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var pos = scanner.getTokenPos();
+                    var end = scanner.getTextPos();
+                    var result = createNode(69, pos);
+                    result.text = content.substring(pos, end);
+                    finishNode(result, end);
+                    nextJSDocToken();
+                    return result;
+                }
+            }
+            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
+        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
+    })(Parser || (Parser = {}));
+    var IncrementalParser;
+    (function (IncrementalParser) {
+        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2);
+            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
+            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
+                return sourceFile;
+            }
+            if (sourceFile.statements.length === 0) {
+                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, undefined, true, sourceFile.scriptKind);
+            }
+            var incrementalSourceFile = sourceFile;
+            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
+            incrementalSourceFile.hasBeenIncrementallyParsed = true;
+            var oldText = sourceFile.text;
+            var syntaxCursor = createSyntaxCursor(sourceFile);
+            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
+            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
+            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
+            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
+            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
+            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
+            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
+            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, true, sourceFile.scriptKind);
+            return result;
+        }
+        IncrementalParser.updateSourceFile = updateSourceFile;
+        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
+            if (isArray) {
+                visitArray(element);
+            }
+            else {
+                visitNode(element);
+            }
+            return;
+            function visitNode(node) {
+                var text = "";
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    text = oldText.substring(node.pos, node.end);
+                }
+                if (node._children) {
+                    node._children = undefined;
+                }
+                node.pos += delta;
+                node.end += delta;
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
+                }
+                forEachChild(node, visitNode, visitArray);
+                if (node.jsDocComments) {
+                    for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        forEachChild(jsDocComment, visitNode, visitArray);
+                    }
+                }
+                checkNodePositions(node, aggressiveChecks);
+            }
+            function visitArray(array) {
+                array._children = undefined;
+                array.pos += delta;
+                array.end += delta;
+                for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
+                    var node = array_7[_i];
+                    visitNode(node);
+                }
+            }
+        }
+        function shouldCheckNode(node) {
+            switch (node.kind) {
+                case 9:
+                case 8:
+                case 69:
+                    return true;
+            }
+            return false;
+        }
+        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
+            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
+            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
+            ts.Debug.assert(element.pos <= element.end);
+            element.pos = Math.min(element.pos, changeRangeNewEnd);
+            if (element.end >= changeRangeOldEnd) {
+                element.end += delta;
+            }
+            else {
+                element.end = Math.min(element.end, changeRangeNewEnd);
+            }
+            ts.Debug.assert(element.pos <= element.end);
+            if (element.parent) {
+                ts.Debug.assert(element.pos >= element.parent.pos);
+                ts.Debug.assert(element.end <= element.parent.end);
+            }
+        }
+        function checkNodePositions(node, aggressiveChecks) {
+            if (aggressiveChecks) {
+                var pos_2 = node.pos;
+                forEachChild(node, function (child) {
+                    ts.Debug.assert(child.pos >= pos_2);
+                    pos_2 = child.end;
+                });
+                ts.Debug.assert(pos_2 <= node.end);
+            }
+        }
+        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
+            visitNode(sourceFile);
+            return;
+            function visitNode(child) {
+                ts.Debug.assert(child.pos <= child.end);
+                if (child.pos > changeRangeOldEnd) {
+                    moveElementEntirelyPastChangeRange(child, false, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                var fullEnd = child.end;
+                if (fullEnd >= changeStart) {
+                    child.intersectsChange = true;
+                    child._children = undefined;
+                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    forEachChild(child, visitNode, visitArray);
+                    checkNodePositions(child, aggressiveChecks);
+                    return;
+                }
+                ts.Debug.assert(fullEnd < changeStart);
+            }
+            function visitArray(array) {
+                ts.Debug.assert(array.pos <= array.end);
+                if (array.pos > changeRangeOldEnd) {
+                    moveElementEntirelyPastChangeRange(array, true, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                var fullEnd = array.end;
+                if (fullEnd >= changeStart) {
+                    array.intersectsChange = true;
+                    array._children = undefined;
+                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
+                        var node = array_8[_i];
+                        visitNode(node);
+                    }
+                    return;
+                }
+                ts.Debug.assert(fullEnd < changeStart);
+            }
+        }
+        function extendToAffectedRange(sourceFile, changeRange) {
+            var maxLookahead = 1;
+            var start = changeRange.span.start;
+            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
+                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
+                ts.Debug.assert(nearestNode.pos <= start);
+                var position = nearestNode.pos;
+                start = Math.max(0, position - 1);
+            }
+            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
+            var finalLength = changeRange.newLength + (changeRange.span.start - start);
+            return ts.createTextChangeRange(finalSpan, finalLength);
+        }
+        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
+            var bestResult = sourceFile;
+            var lastNodeEntirelyBeforePosition;
+            forEachChild(sourceFile, visit);
+            if (lastNodeEntirelyBeforePosition) {
+                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
+                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
+                    bestResult = lastChildOfLastEntireNodeBeforePosition;
+                }
+            }
+            return bestResult;
+            function getLastChild(node) {
+                while (true) {
+                    var lastChild = getLastChildWorker(node);
+                    if (lastChild) {
+                        node = lastChild;
+                    }
+                    else {
+                        return node;
+                    }
+                }
+            }
+            function getLastChildWorker(node) {
+                var last = undefined;
+                forEachChild(node, function (child) {
+                    if (ts.nodeIsPresent(child)) {
+                        last = child;
+                    }
+                });
+                return last;
+            }
+            function visit(child) {
+                if (ts.nodeIsMissing(child)) {
+                    return;
+                }
+                if (child.pos <= position) {
+                    if (child.pos >= bestResult.pos) {
+                        bestResult = child;
+                    }
+                    if (position < child.end) {
+                        forEachChild(child, visit);
+                        return true;
+                    }
+                    else {
+                        ts.Debug.assert(child.end <= position);
+                        lastNodeEntirelyBeforePosition = child;
+                    }
+                }
+                else {
+                    ts.Debug.assert(child.pos > position);
+                    return true;
+                }
+            }
+        }
+        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            var oldText = sourceFile.text;
+            if (textChangeRange) {
+                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
+                if (aggressiveChecks || ts.Debug.shouldAssert(3)) {
+                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
+                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
+                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
+                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
+                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
+                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
+                }
+            }
+        }
+        function createSyntaxCursor(sourceFile) {
+            var currentArray = sourceFile.statements;
+            var currentArrayIndex = 0;
+            ts.Debug.assert(currentArrayIndex < currentArray.length);
+            var current = currentArray[currentArrayIndex];
+            var lastQueriedPosition = -1;
+            return {
+                currentNode: function (position) {
+                    if (position !== lastQueriedPosition) {
+                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
+                            currentArrayIndex++;
+                            current = currentArray[currentArrayIndex];
+                        }
+                        if (!current || current.pos !== position) {
+                            findHighestListElementThatStartsAtPosition(position);
+                        }
+                    }
+                    lastQueriedPosition = position;
+                    ts.Debug.assert(!current || current.pos === position);
+                    return current;
+                }
+            };
+            function findHighestListElementThatStartsAtPosition(position) {
+                currentArray = undefined;
+                currentArrayIndex = -1;
+                current = undefined;
+                forEachChild(sourceFile, visitNode, visitArray);
+                return;
+                function visitNode(node) {
+                    if (position >= node.pos && position < node.end) {
+                        forEachChild(node, visitNode, visitArray);
+                        return true;
+                    }
+                    return false;
+                }
+                function visitArray(array) {
+                    if (position >= array.pos && position < array.end) {
+                        for (var i = 0, n = array.length; i < n; i++) {
+                            var child = array[i];
+                            if (child) {
+                                if (child.pos === position) {
+                                    currentArray = array;
+                                    currentArrayIndex = i;
+                                    current = child;
+                                    return true;
+                                }
+                                else {
+                                    if (child.pos < position && position < child.end) {
+                                        forEachChild(child, visitNode, visitArray);
+                                        return true;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                    return false;
+                }
+            }
+        }
+    })(IncrementalParser || (IncrementalParser = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.bindTime = 0;
+    function getModuleInstanceState(node) {
+        if (node.kind === 222 || node.kind === 223) {
+            return 0;
+        }
+        else if (ts.isConstEnumDeclaration(node)) {
+            return 2;
+        }
+        else if ((node.kind === 230 || node.kind === 229) && !(node.flags & 1)) {
+            return 0;
+        }
+        else if (node.kind === 226) {
+            var state_1 = 0;
+            ts.forEachChild(node, function (n) {
+                switch (getModuleInstanceState(n)) {
+                    case 0:
+                        return false;
+                    case 2:
+                        state_1 = 2;
+                        return false;
+                    case 1:
+                        state_1 = 1;
+                        return true;
+                }
+            });
+            return state_1;
+        }
+        else if (node.kind === 225) {
+            return getModuleInstanceState(node.body);
+        }
+        else {
+            return 1;
+        }
+    }
+    ts.getModuleInstanceState = getModuleInstanceState;
+    var binder = createBinder();
+    function bindSourceFile(file, options) {
+        var start = new Date().getTime();
+        binder(file, options);
+        ts.bindTime += new Date().getTime() - start;
+    }
+    ts.bindSourceFile = bindSourceFile;
+    function createBinder() {
+        var file;
+        var options;
+        var languageVersion;
+        var parent;
+        var container;
+        var blockScopeContainer;
+        var lastContainer;
+        var seenThisKeyword;
+        var currentFlow;
+        var currentBreakTarget;
+        var currentContinueTarget;
+        var currentReturnTarget;
+        var currentTrueTarget;
+        var currentFalseTarget;
+        var preSwitchCaseFlow;
+        var activeLabels;
+        var hasExplicitReturn;
+        var emitFlags;
+        var inStrictMode;
+        var symbolCount = 0;
+        var Symbol;
+        var classifiableNames;
+        var unreachableFlow = { flags: 1 };
+        var reportedUnreachableFlow = { flags: 1 };
+        function bindSourceFile(f, opts) {
+            file = f;
+            options = opts;
+            languageVersion = ts.getEmitScriptTarget(options);
+            inStrictMode = !!file.externalModuleIndicator;
+            classifiableNames = {};
+            symbolCount = 0;
+            Symbol = ts.objectAllocator.getSymbolConstructor();
+            if (!file.locals) {
+                bind(file);
+                file.symbolCount = symbolCount;
+                file.classifiableNames = classifiableNames;
+            }
+            file = undefined;
+            options = undefined;
+            languageVersion = undefined;
+            parent = undefined;
+            container = undefined;
+            blockScopeContainer = undefined;
+            lastContainer = undefined;
+            seenThisKeyword = false;
+            currentFlow = undefined;
+            currentBreakTarget = undefined;
+            currentContinueTarget = undefined;
+            currentReturnTarget = undefined;
+            currentTrueTarget = undefined;
+            currentFalseTarget = undefined;
+            activeLabels = undefined;
+            hasExplicitReturn = false;
+            emitFlags = 0;
+        }
+        return bindSourceFile;
+        function createSymbol(flags, name) {
+            symbolCount++;
+            return new Symbol(flags, name);
+        }
+        function addDeclarationToSymbol(symbol, node, symbolFlags) {
+            symbol.flags |= symbolFlags;
+            node.symbol = symbol;
+            if (!symbol.declarations) {
+                symbol.declarations = [];
+            }
+            symbol.declarations.push(node);
+            if (symbolFlags & 1952 && !symbol.exports) {
+                symbol.exports = {};
+            }
+            if (symbolFlags & 6240 && !symbol.members) {
+                symbol.members = {};
+            }
+            if (symbolFlags & 107455) {
+                var valueDeclaration = symbol.valueDeclaration;
+                if (!valueDeclaration ||
+                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 225)) {
+                    symbol.valueDeclaration = node;
+                }
+            }
+        }
+        function getDeclarationName(node) {
+            if (node.name) {
+                if (ts.isAmbientModule(node)) {
+                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
+                }
+                if (node.name.kind === 140) {
+                    var nameExpression = node.name.expression;
+                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
+                        return nameExpression.text;
+                    }
+                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
+                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
+                }
+                return node.name.text;
+            }
+            switch (node.kind) {
+                case 148:
+                    return "__constructor";
+                case 156:
+                case 151:
+                    return "__call";
+                case 157:
+                case 152:
+                    return "__new";
+                case 153:
+                    return "__index";
+                case 236:
+                    return "__export";
+                case 235:
+                    return node.isExportEquals ? "export=" : "default";
+                case 187:
+                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
+                        case 2:
+                            return "export=";
+                        case 1:
+                        case 4:
+                            return node.left.name.text;
+                        case 3:
+                            return node.left.expression.name.text;
+                    }
+                    ts.Debug.fail("Unknown binary declaration kind");
+                    break;
+                case 220:
+                case 221:
+                    return node.flags & 512 ? "default" : undefined;
+                case 269:
+                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
+                case 142:
+                    ts.Debug.assert(node.parent.kind === 269);
+                    var functionType = node.parent;
+                    var index = ts.indexOf(functionType.parameters, node);
+                    return "p" + index;
+                case 279:
+                    var parentNode = node.parent && node.parent.parent;
+                    var nameFromParentNode = void 0;
+                    if (parentNode && parentNode.kind === 200) {
+                        if (parentNode.declarationList.declarations.length > 0) {
+                            var nameIdentifier = parentNode.declarationList.declarations[0].name;
+                            if (nameIdentifier.kind === 69) {
+                                nameFromParentNode = nameIdentifier.text;
+                            }
+                        }
+                    }
+                    return nameFromParentNode;
+            }
+        }
+        function getDisplayName(node) {
+            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
+        }
+        function declareSymbol(symbolTable, parent, node, includes, excludes) {
+            ts.Debug.assert(!ts.hasDynamicName(node));
+            var isDefaultExport = node.flags & 512;
+            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
+            var symbol;
+            if (name !== undefined) {
+                symbol = ts.hasProperty(symbolTable, name)
+                    ? symbolTable[name]
+                    : (symbolTable[name] = createSymbol(0, name));
+                if (name && (includes & 788448)) {
+                    classifiableNames[name] = name;
+                }
+                if (symbol.flags & excludes) {
+                    if (node.name) {
+                        node.name.parent = node;
+                    }
+                    var message_1 = symbol.flags & 2
+                        ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
+                        : ts.Diagnostics.Duplicate_identifier_0;
+                    ts.forEach(symbol.declarations, function (declaration) {
+                        if (declaration.flags & 512) {
+                            message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
+                        }
+                    });
+                    ts.forEach(symbol.declarations, function (declaration) {
+                        file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
+                    });
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
+                    symbol = createSymbol(0, name);
+                }
+            }
+            else {
+                symbol = createSymbol(0, "__missing");
+            }
+            addDeclarationToSymbol(symbol, node, includes);
+            symbol.parent = parent;
+            return symbol;
+        }
+        function declareModuleMember(node, symbolFlags, symbolExcludes) {
+            var hasExportModifier = ts.getCombinedNodeFlags(node) & 1;
+            if (symbolFlags & 8388608) {
+                if (node.kind === 238 || (node.kind === 229 && hasExportModifier)) {
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                }
+                else {
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                }
+            }
+            else {
+                if (!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 8192)) {
+                    var exportKind = (symbolFlags & 107455 ? 1048576 : 0) |
+                        (symbolFlags & 793056 ? 2097152 : 0) |
+                        (symbolFlags & 1536 ? 4194304 : 0);
+                    var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
+                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                    node.localSymbol = local;
+                    return local;
+                }
+                else {
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                }
+            }
+        }
+        function bindContainer(node, containerFlags) {
+            var saveContainer = container;
+            var savedBlockScopeContainer = blockScopeContainer;
+            if (containerFlags & 1) {
+                container = blockScopeContainer = node;
+                if (containerFlags & 32) {
+                    container.locals = {};
+                }
+                addToContainerChain(container);
+            }
+            else if (containerFlags & 2) {
+                blockScopeContainer = node;
+                blockScopeContainer.locals = undefined;
+            }
+            if (containerFlags & 4) {
+                var saveCurrentFlow = currentFlow;
+                var saveBreakTarget = currentBreakTarget;
+                var saveContinueTarget = currentContinueTarget;
+                var saveReturnTarget = currentReturnTarget;
+                var saveActiveLabels = activeLabels;
+                var saveHasExplicitReturn = hasExplicitReturn;
+                var isIIFE = containerFlags & 16 && !!ts.getImmediatelyInvokedFunctionExpression(node);
+                if (isIIFE) {
+                    currentReturnTarget = createBranchLabel();
+                }
+                else {
+                    currentFlow = { flags: 2 };
+                    if (containerFlags & 16) {
+                        currentFlow.container = node;
+                    }
+                    currentReturnTarget = undefined;
+                }
+                currentBreakTarget = undefined;
+                currentContinueTarget = undefined;
+                activeLabels = undefined;
+                hasExplicitReturn = false;
+                bindChildren(node);
+                node.flags &= ~4030464;
+                if (!(currentFlow.flags & 1) && containerFlags & 8 && ts.nodeIsPresent(node.body)) {
+                    node.flags |= 32768;
+                    if (hasExplicitReturn)
+                        node.flags |= 65536;
+                }
+                if (node.kind === 256) {
+                    node.flags |= emitFlags;
+                }
+                if (isIIFE) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                    currentFlow = finishFlowLabel(currentReturnTarget);
+                }
+                else {
+                    currentFlow = saveCurrentFlow;
+                }
+                currentBreakTarget = saveBreakTarget;
+                currentContinueTarget = saveContinueTarget;
+                currentReturnTarget = saveReturnTarget;
+                activeLabels = saveActiveLabels;
+                hasExplicitReturn = saveHasExplicitReturn;
+            }
+            else if (containerFlags & 64) {
+                seenThisKeyword = false;
+                bindChildren(node);
+                node.flags = seenThisKeyword ? node.flags | 16384 : node.flags & ~16384;
+            }
+            else {
+                bindChildren(node);
+            }
+            container = saveContainer;
+            blockScopeContainer = savedBlockScopeContainer;
+        }
+        function bindChildren(node) {
+            if (ts.isInJavaScriptFile(node) && node.jsDocComments) {
+                for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                    var jsDocComment = _a[_i];
+                    bind(jsDocComment);
+                }
+            }
+            if (checkUnreachable(node)) {
+                ts.forEachChild(node, bind);
+                return;
+            }
+            switch (node.kind) {
+                case 205:
+                    bindWhileStatement(node);
+                    break;
+                case 204:
+                    bindDoStatement(node);
+                    break;
+                case 206:
+                    bindForStatement(node);
+                    break;
+                case 207:
+                case 208:
+                    bindForInOrForOfStatement(node);
+                    break;
+                case 203:
+                    bindIfStatement(node);
+                    break;
+                case 211:
+                case 215:
+                    bindReturnOrThrow(node);
+                    break;
+                case 210:
+                case 209:
+                    bindBreakOrContinueStatement(node);
+                    break;
+                case 216:
+                    bindTryStatement(node);
+                    break;
+                case 213:
+                    bindSwitchStatement(node);
+                    break;
+                case 227:
+                    bindCaseBlock(node);
+                    break;
+                case 214:
+                    bindLabeledStatement(node);
+                    break;
+                case 185:
+                    bindPrefixUnaryExpressionFlow(node);
+                    break;
+                case 187:
+                    bindBinaryExpressionFlow(node);
+                    break;
+                case 181:
+                    bindDeleteExpressionFlow(node);
+                    break;
+                case 188:
+                    bindConditionalExpressionFlow(node);
+                    break;
+                case 218:
+                    bindVariableDeclarationFlow(node);
+                    break;
+                case 174:
+                    bindCallExpressionFlow(node);
+                    break;
+                default:
+                    ts.forEachChild(node, bind);
+                    break;
+            }
+        }
+        function isNarrowableReference(expr) {
+            return expr.kind === 69 ||
+                expr.kind === 97 ||
+                expr.kind === 172 && isNarrowableReference(expr.expression);
+        }
+        function isNarrowingExpression(expr) {
+            switch (expr.kind) {
+                case 69:
+                case 97:
+                case 172:
+                    return isNarrowableReference(expr);
+                case 174:
+                    return true;
+                case 178:
+                    return isNarrowingExpression(expr.expression);
+                case 187:
+                    return isNarrowingBinaryExpression(expr);
+                case 185:
+                    return expr.operator === 49 && isNarrowingExpression(expr.operand);
+            }
+            return false;
+        }
+        function isNarrowingBinaryExpression(expr) {
+            switch (expr.operatorToken.kind) {
+                case 56:
+                    return isNarrowableReference(expr.left);
+                case 30:
+                case 31:
+                case 32:
+                case 33:
+                    if (isNarrowingExpression(expr.left) && (expr.right.kind === 93 || expr.right.kind === 69)) {
+                        return true;
+                    }
+                    if (expr.left.kind === 182 && isNarrowingExpression(expr.left.expression) && expr.right.kind === 9) {
+                        return true;
+                    }
+                    return false;
+                case 91:
+                    return isNarrowingExpression(expr.left);
+                case 24:
+                    return isNarrowingExpression(expr.right);
+            }
+            return false;
+        }
+        function createBranchLabel() {
+            return {
+                flags: 4,
+                antecedents: undefined
+            };
+        }
+        function createLoopLabel() {
+            return {
+                flags: 8,
+                antecedents: undefined
+            };
+        }
+        function setFlowNodeReferenced(flow) {
+            flow.flags |= flow.flags & 128 ? 256 : 128;
+        }
+        function addAntecedent(label, antecedent) {
+            if (!(antecedent.flags & 1) && !ts.contains(label.antecedents, antecedent)) {
+                (label.antecedents || (label.antecedents = [])).push(antecedent);
+                setFlowNodeReferenced(antecedent);
+            }
+        }
+        function createFlowCondition(flags, antecedent, expression) {
+            if (antecedent.flags & 1) {
+                return antecedent;
+            }
+            if (!expression) {
+                return flags & 32 ? antecedent : unreachableFlow;
+            }
+            if (expression.kind === 99 && flags & 64 ||
+                expression.kind === 84 && flags & 32) {
+                return unreachableFlow;
+            }
+            if (!isNarrowingExpression(expression)) {
+                return antecedent;
+            }
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: flags,
+                antecedent: antecedent,
+                expression: expression
+            };
+        }
+        function createFlowAssignment(antecedent, node) {
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: 16,
+                antecedent: antecedent,
+                node: node
+            };
+        }
+        function finishFlowLabel(flow) {
+            var antecedents = flow.antecedents;
+            if (!antecedents) {
+                return unreachableFlow;
+            }
+            if (antecedents.length === 1) {
+                return antecedents[0];
+            }
+            return flow;
+        }
+        function isStatementCondition(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 203:
+                case 205:
+                case 204:
+                    return parent.expression === node;
+                case 206:
+                case 188:
+                    return parent.condition === node;
+            }
+            return false;
+        }
+        function isLogicalExpression(node) {
+            while (true) {
+                if (node.kind === 178) {
+                    node = node.expression;
+                }
+                else if (node.kind === 185 && node.operator === 49) {
+                    node = node.operand;
+                }
+                else {
+                    return node.kind === 187 && (node.operatorToken.kind === 51 ||
+                        node.operatorToken.kind === 52);
+                }
+            }
+        }
+        function isTopLevelLogicalExpression(node) {
+            while (node.parent.kind === 178 ||
+                node.parent.kind === 185 &&
+                    node.parent.operator === 49) {
+                node = node.parent;
+            }
+            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
+        }
+        function bindCondition(node, trueTarget, falseTarget) {
+            var saveTrueTarget = currentTrueTarget;
+            var saveFalseTarget = currentFalseTarget;
+            currentTrueTarget = trueTarget;
+            currentFalseTarget = falseTarget;
+            bind(node);
+            currentTrueTarget = saveTrueTarget;
+            currentFalseTarget = saveFalseTarget;
+            if (!node || !isLogicalExpression(node)) {
+                addAntecedent(trueTarget, createFlowCondition(32, currentFlow, node));
+                addAntecedent(falseTarget, createFlowCondition(64, currentFlow, node));
+            }
+        }
+        function bindIterativeStatement(node, breakTarget, continueTarget) {
+            var saveBreakTarget = currentBreakTarget;
+            var saveContinueTarget = currentContinueTarget;
+            currentBreakTarget = breakTarget;
+            currentContinueTarget = continueTarget;
+            bind(node);
+            currentBreakTarget = saveBreakTarget;
+            currentContinueTarget = saveContinueTarget;
+        }
+        function bindWhileStatement(node) {
+            var preWhileLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postWhileLabel = createBranchLabel();
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = preWhileLabel;
+            bindCondition(node.expression, preBodyLabel, postWhileLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = finishFlowLabel(postWhileLabel);
+        }
+        function bindDoStatement(node) {
+            var preDoLabel = createLoopLabel();
+            var preConditionLabel = createBranchLabel();
+            var postDoLabel = createBranchLabel();
+            addAntecedent(preDoLabel, currentFlow);
+            currentFlow = preDoLabel;
+            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
+            addAntecedent(preConditionLabel, currentFlow);
+            currentFlow = finishFlowLabel(preConditionLabel);
+            bindCondition(node.expression, preDoLabel, postDoLabel);
+            currentFlow = finishFlowLabel(postDoLabel);
+        }
+        function bindForStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postLoopLabel = createBranchLabel();
+            bind(node.initializer);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            bindCondition(node.condition, preBodyLabel, postLoopLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            bind(node.incrementor);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
+        }
+        function bindForInOrForOfStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var postLoopLabel = createBranchLabel();
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            bind(node.expression);
+            addAntecedent(postLoopLabel, currentFlow);
+            bind(node.initializer);
+            if (node.initializer.kind !== 219) {
+                bindAssignmentTargetFlow(node.initializer);
+            }
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
+        }
+        function bindIfStatement(node) {
+            var thenLabel = createBranchLabel();
+            var elseLabel = createBranchLabel();
+            var postIfLabel = createBranchLabel();
+            bindCondition(node.expression, thenLabel, elseLabel);
+            currentFlow = finishFlowLabel(thenLabel);
+            bind(node.thenStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(elseLabel);
+            bind(node.elseStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(postIfLabel);
+        }
+        function bindReturnOrThrow(node) {
+            bind(node.expression);
+            if (node.kind === 211) {
+                hasExplicitReturn = true;
+                if (currentReturnTarget) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                }
+            }
+            currentFlow = unreachableFlow;
+        }
+        function findActiveLabel(name) {
+            if (activeLabels) {
+                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
+                    var label = activeLabels_1[_i];
+                    if (label.name === name) {
+                        return label;
+                    }
+                }
+            }
+            return undefined;
+        }
+        function bindbreakOrContinueFlow(node, breakTarget, continueTarget) {
+            var flowLabel = node.kind === 210 ? breakTarget : continueTarget;
+            if (flowLabel) {
+                addAntecedent(flowLabel, currentFlow);
+                currentFlow = unreachableFlow;
+            }
+        }
+        function bindBreakOrContinueStatement(node) {
+            bind(node.label);
+            if (node.label) {
+                var activeLabel = findActiveLabel(node.label.text);
+                if (activeLabel) {
+                    activeLabel.referenced = true;
+                    bindbreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
+                }
+            }
+            else {
+                bindbreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
+            }
+        }
+        function bindTryStatement(node) {
+            var postFinallyLabel = createBranchLabel();
+            var preTryFlow = currentFlow;
+            bind(node.tryBlock);
+            addAntecedent(postFinallyLabel, currentFlow);
+            if (node.catchClause) {
+                currentFlow = preTryFlow;
+                bind(node.catchClause);
+                addAntecedent(postFinallyLabel, currentFlow);
+            }
+            if (node.finallyBlock) {
+                currentFlow = preTryFlow;
+                bind(node.finallyBlock);
+            }
+            currentFlow = finishFlowLabel(postFinallyLabel);
+        }
+        function bindSwitchStatement(node) {
+            var postSwitchLabel = createBranchLabel();
+            bind(node.expression);
+            var saveBreakTarget = currentBreakTarget;
+            var savePreSwitchCaseFlow = preSwitchCaseFlow;
+            currentBreakTarget = postSwitchLabel;
+            preSwitchCaseFlow = currentFlow;
+            bind(node.caseBlock);
+            addAntecedent(postSwitchLabel, currentFlow);
+            var hasNonEmptyDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 250 && c.statements.length; });
+            if (!hasNonEmptyDefault) {
+                addAntecedent(postSwitchLabel, preSwitchCaseFlow);
+            }
+            currentBreakTarget = saveBreakTarget;
+            preSwitchCaseFlow = savePreSwitchCaseFlow;
+            currentFlow = finishFlowLabel(postSwitchLabel);
+        }
+        function bindCaseBlock(node) {
+            var clauses = node.clauses;
+            for (var i = 0; i < clauses.length; i++) {
+                var clause = clauses[i];
+                if (clause.statements.length) {
+                    if (currentFlow.flags & 1) {
+                        currentFlow = preSwitchCaseFlow;
+                    }
+                    else {
+                        var preCaseLabel = createBranchLabel();
+                        addAntecedent(preCaseLabel, preSwitchCaseFlow);
+                        addAntecedent(preCaseLabel, currentFlow);
+                        currentFlow = finishFlowLabel(preCaseLabel);
+                    }
+                    bind(clause);
+                    if (!(currentFlow.flags & 1) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
+                        errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
+                    }
+                }
+                else {
+                    bind(clause);
+                }
+            }
+        }
+        function pushActiveLabel(name, breakTarget, continueTarget) {
+            var activeLabel = {
+                name: name,
+                breakTarget: breakTarget,
+                continueTarget: continueTarget,
+                referenced: false
+            };
+            (activeLabels || (activeLabels = [])).push(activeLabel);
+            return activeLabel;
+        }
+        function popActiveLabel() {
+            activeLabels.pop();
+        }
+        function bindLabeledStatement(node) {
+            var preStatementLabel = createLoopLabel();
+            var postStatementLabel = createBranchLabel();
+            bind(node.label);
+            addAntecedent(preStatementLabel, currentFlow);
+            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
+            bind(node.statement);
+            popActiveLabel();
+            if (!activeLabel.referenced && !options.allowUnusedLabels) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
+            }
+            addAntecedent(postStatementLabel, currentFlow);
+            currentFlow = finishFlowLabel(postStatementLabel);
+        }
+        function bindDestructuringTargetFlow(node) {
+            if (node.kind === 187 && node.operatorToken.kind === 56) {
+                bindAssignmentTargetFlow(node.left);
+            }
+            else {
+                bindAssignmentTargetFlow(node);
+            }
+        }
+        function bindAssignmentTargetFlow(node) {
+            if (isNarrowableReference(node)) {
+                currentFlow = createFlowAssignment(currentFlow, node);
+            }
+            else if (node.kind === 170) {
+                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
+                    var e = _a[_i];
+                    if (e.kind === 191) {
+                        bindAssignmentTargetFlow(e.expression);
+                    }
+                    else {
+                        bindDestructuringTargetFlow(e);
+                    }
+                }
+            }
+            else if (node.kind === 171) {
+                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
+                    var p = _c[_b];
+                    if (p.kind === 253) {
+                        bindDestructuringTargetFlow(p.initializer);
+                    }
+                    else if (p.kind === 254) {
+                        bindAssignmentTargetFlow(p.name);
+                    }
+                }
+            }
+        }
+        function bindLogicalExpression(node, trueTarget, falseTarget) {
+            var preRightLabel = createBranchLabel();
+            if (node.operatorToken.kind === 51) {
+                bindCondition(node.left, preRightLabel, falseTarget);
+            }
+            else {
+                bindCondition(node.left, trueTarget, preRightLabel);
+            }
+            currentFlow = finishFlowLabel(preRightLabel);
+            bind(node.operatorToken);
+            bindCondition(node.right, trueTarget, falseTarget);
+        }
+        function bindPrefixUnaryExpressionFlow(node) {
+            if (node.operator === 49) {
+                var saveTrueTarget = currentTrueTarget;
+                currentTrueTarget = currentFalseTarget;
+                currentFalseTarget = saveTrueTarget;
+                ts.forEachChild(node, bind);
+                currentFalseTarget = currentTrueTarget;
+                currentTrueTarget = saveTrueTarget;
+            }
+            else {
+                ts.forEachChild(node, bind);
+            }
+        }
+        function bindBinaryExpressionFlow(node) {
+            var operator = node.operatorToken.kind;
+            if (operator === 51 || operator === 52) {
+                if (isTopLevelLogicalExpression(node)) {
+                    var postExpressionLabel = createBranchLabel();
+                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
+                    currentFlow = finishFlowLabel(postExpressionLabel);
+                }
+                else {
+                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
+                }
+            }
+            else {
+                ts.forEachChild(node, bind);
+                if (operator === 56 && !ts.isAssignmentTarget(node)) {
+                    bindAssignmentTargetFlow(node.left);
+                }
+            }
+        }
+        function bindDeleteExpressionFlow(node) {
+            ts.forEachChild(node, bind);
+            if (node.expression.kind === 172) {
+                bindAssignmentTargetFlow(node.expression);
+            }
+        }
+        function bindConditionalExpressionFlow(node) {
+            var trueLabel = createBranchLabel();
+            var falseLabel = createBranchLabel();
+            var postExpressionLabel = createBranchLabel();
+            bindCondition(node.condition, trueLabel, falseLabel);
+            currentFlow = finishFlowLabel(trueLabel);
+            bind(node.whenTrue);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(falseLabel);
+            bind(node.whenFalse);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(postExpressionLabel);
+        }
+        function bindInitializedVariableFlow(node) {
+            var name = node.name;
+            if (ts.isBindingPattern(name)) {
+                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
+                    var child = _a[_i];
+                    bindInitializedVariableFlow(child);
+                }
+            }
+            else {
+                currentFlow = createFlowAssignment(currentFlow, node);
+            }
+        }
+        function bindVariableDeclarationFlow(node) {
+            ts.forEachChild(node, bind);
+            if (node.initializer || node.parent.parent.kind === 207 || node.parent.parent.kind === 208) {
+                bindInitializedVariableFlow(node);
+            }
+        }
+        function bindCallExpressionFlow(node) {
+            var expr = node.expression;
+            while (expr.kind === 178) {
+                expr = expr.expression;
+            }
+            if (expr.kind === 179 || expr.kind === 180) {
+                ts.forEach(node.typeArguments, bind);
+                ts.forEach(node.arguments, bind);
+                bind(node.expression);
+            }
+            else {
+                ts.forEachChild(node, bind);
+            }
+        }
+        function getContainerFlags(node) {
+            switch (node.kind) {
+                case 192:
+                case 221:
+                case 224:
+                case 171:
+                case 159:
+                case 281:
+                case 265:
+                    return 1;
+                case 222:
+                    return 1 | 64;
+                case 269:
+                case 225:
+                case 223:
+                    return 1 | 32;
+                case 256:
+                    return 1 | 4 | 32;
+                case 148:
+                case 220:
+                case 147:
+                case 146:
+                case 149:
+                case 150:
+                case 151:
+                case 152:
+                case 153:
+                case 156:
+                case 157:
+                    return 1 | 4 | 32 | 8;
+                case 179:
+                case 180:
+                    return 1 | 4 | 32 | 8 | 16;
+                case 226:
+                    return 4;
+                case 145:
+                    return node.initializer ? 4 : 0;
+                case 252:
+                case 206:
+                case 207:
+                case 208:
+                case 227:
+                    return 2;
+                case 199:
+                    return ts.isFunctionLike(node.parent) ? 0 : 2;
+            }
+            return 0;
+        }
+        function addToContainerChain(next) {
+            if (lastContainer) {
+                lastContainer.nextContainer = next;
+            }
+            lastContainer = next;
+        }
+        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
+            return declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
+        }
+        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
+            switch (container.kind) {
+                case 225:
+                    return declareModuleMember(node, symbolFlags, symbolExcludes);
+                case 256:
+                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
+                case 192:
+                case 221:
+                    return declareClassMember(node, symbolFlags, symbolExcludes);
+                case 224:
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                case 159:
+                case 171:
+                case 222:
+                case 265:
+                case 281:
+                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+                case 156:
+                case 157:
+                case 151:
+                case 152:
+                case 153:
+                case 147:
+                case 146:
+                case 148:
+                case 149:
+                case 150:
+                case 220:
+                case 179:
+                case 180:
+                case 269:
+                case 223:
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+            }
+        }
+        function declareClassMember(node, symbolFlags, symbolExcludes) {
+            return node.flags & 32
+                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
+                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+        }
+        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
+            return ts.isExternalModule(file)
+                ? declareModuleMember(node, symbolFlags, symbolExcludes)
+                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
+        }
+        function hasExportDeclarations(node) {
+            var body = node.kind === 256 ? node : node.body;
+            if (body.kind === 256 || body.kind === 226) {
+                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
+                    var stat = _a[_i];
+                    if (stat.kind === 236 || stat.kind === 235) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function setExportContextFlag(node) {
+            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
+                node.flags |= 8192;
+            }
+            else {
+                node.flags &= ~8192;
+            }
+        }
+        function bindModuleDeclaration(node) {
+            setExportContextFlag(node);
+            if (ts.isAmbientModule(node)) {
+                if (node.flags & 1) {
+                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    declareSymbolAndAddToSymbolTable(node, 1024, 0);
+                }
+                else {
+                    var pattern = void 0;
+                    if (node.name.kind === 9) {
+                        var text = node.name.text;
+                        if (ts.hasZeroOrOneAsteriskCharacter(text)) {
+                            pattern = ts.tryParsePattern(text);
+                        }
+                        else {
+                            errorOnFirstToken(node.name, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, text);
+                        }
+                    }
+                    var symbol = declareSymbolAndAddToSymbolTable(node, 512, 106639);
+                    if (pattern) {
+                        (file.patternAmbientModules || (file.patternAmbientModules = [])).push({ pattern: pattern, symbol: symbol });
+                    }
+                }
+            }
+            else {
+                var state = getModuleInstanceState(node);
+                if (state === 0) {
+                    declareSymbolAndAddToSymbolTable(node, 1024, 0);
+                }
+                else {
+                    declareSymbolAndAddToSymbolTable(node, 512, 106639);
+                    if (node.symbol.flags & (16 | 32 | 256)) {
+                        node.symbol.constEnumOnlyModule = false;
+                    }
+                    else {
+                        var currentModuleIsConstEnumOnly = state === 2;
+                        if (node.symbol.constEnumOnlyModule === undefined) {
+                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
+                        }
+                        else {
+                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
+                        }
+                    }
+                }
+            }
+        }
+        function bindFunctionOrConstructorType(node) {
+            var symbol = createSymbol(131072, getDeclarationName(node));
+            addDeclarationToSymbol(symbol, node, 131072);
+            var typeLiteralSymbol = createSymbol(2048, "__type");
+            addDeclarationToSymbol(typeLiteralSymbol, node, 2048);
+            typeLiteralSymbol.members = (_a = {}, _a[symbol.name] = symbol, _a);
+            var _a;
+        }
+        function bindObjectLiteralExpression(node) {
+            if (inStrictMode) {
+                var seen = {};
+                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (prop.name.kind !== 69) {
+                        continue;
+                    }
+                    var identifier = prop.name;
+                    var currentKind = prop.kind === 253 || prop.kind === 254 || prop.kind === 147
+                        ? 1
+                        : 2;
+                    var existingKind = seen[identifier.text];
+                    if (!existingKind) {
+                        seen[identifier.text] = currentKind;
+                        continue;
+                    }
+                    if (currentKind === 1 && existingKind === 1) {
+                        var span = ts.getErrorSpanForNode(file, identifier);
+                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
+                    }
+                }
+            }
+            return bindAnonymousDeclaration(node, 4096, "__object");
+        }
+        function bindAnonymousDeclaration(node, symbolFlags, name) {
+            var symbol = createSymbol(symbolFlags, name);
+            addDeclarationToSymbol(symbol, node, symbolFlags);
+        }
+        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
+            switch (blockScopeContainer.kind) {
+                case 225:
+                    declareModuleMember(node, symbolFlags, symbolExcludes);
+                    break;
+                case 256:
+                    if (ts.isExternalModule(container)) {
+                        declareModuleMember(node, symbolFlags, symbolExcludes);
+                        break;
+                    }
+                default:
+                    if (!blockScopeContainer.locals) {
+                        blockScopeContainer.locals = {};
+                        addToContainerChain(blockScopeContainer);
+                    }
+                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
+            }
+        }
+        function bindBlockScopedVariableDeclaration(node) {
+            bindBlockScopedDeclaration(node, 2, 107455);
+        }
+        function checkStrictModeIdentifier(node) {
+            if (inStrictMode &&
+                node.originalKeywordKind >= 106 &&
+                node.originalKeywordKind <= 114 &&
+                !ts.isIdentifierName(node) &&
+                !ts.isInAmbientContext(node)) {
+                if (!file.parseDiagnostics.length) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
+                }
+            }
+        }
+        function getStrictModeIdentifierMessage(node) {
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
+        }
+        function checkStrictModeBinaryExpression(node) {
+            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
+                checkStrictModeEvalOrArguments(node, node.left);
+            }
+        }
+        function checkStrictModeCatchClause(node) {
+            if (inStrictMode && node.variableDeclaration) {
+                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
+            }
+        }
+        function checkStrictModeDeleteExpression(node) {
+            if (inStrictMode && node.expression.kind === 69) {
+                var span = ts.getErrorSpanForNode(file, node.expression);
+                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
+            }
+        }
+        function isEvalOrArgumentsIdentifier(node) {
+            return node.kind === 69 &&
+                (node.text === "eval" || node.text === "arguments");
+        }
+        function checkStrictModeEvalOrArguments(contextNode, name) {
+            if (name && name.kind === 69) {
+                var identifier = name;
+                if (isEvalOrArgumentsIdentifier(identifier)) {
+                    var span = ts.getErrorSpanForNode(file, name);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
+                }
+            }
+        }
+        function getStrictModeEvalOrArgumentsMessage(node) {
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
+        }
+        function checkStrictModeFunctionName(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+        }
+        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
+        }
+        function checkStrictModeFunctionDeclaration(node) {
+            if (languageVersion < 2) {
+                if (blockScopeContainer.kind !== 256 &&
+                    blockScopeContainer.kind !== 225 &&
+                    !ts.isFunctionLike(blockScopeContainer)) {
+                    var errorSpan = ts.getErrorSpanForNode(file, node);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
+                }
+            }
+        }
+        function checkStrictModeNumericLiteral(node) {
+            if (inStrictMode && node.isOctalLiteral) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
+            }
+        }
+        function checkStrictModePostfixUnaryExpression(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.operand);
+            }
+        }
+        function checkStrictModePrefixUnaryExpression(node) {
+            if (inStrictMode) {
+                if (node.operator === 41 || node.operator === 42) {
+                    checkStrictModeEvalOrArguments(node, node.operand);
+                }
+            }
+        }
+        function checkStrictModeWithStatement(node) {
+            if (inStrictMode) {
+                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
+            }
+        }
+        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
+            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
+        }
+        function getDestructuringParameterName(node) {
+            return "__" + ts.indexOf(node.parent.parameters, node);
+        }
+        function bind(node) {
+            if (!node) {
+                return;
+            }
+            node.parent = parent;
+            var saveInStrictMode = inStrictMode;
+            bindWorker(node);
+            if (node.kind > 138) {
+                var saveParent = parent;
+                parent = node;
+                var containerFlags = getContainerFlags(node);
+                if (containerFlags === 0) {
+                    bindChildren(node);
+                }
+                else {
+                    bindContainer(node, containerFlags);
+                }
+                parent = saveParent;
+            }
+            inStrictMode = saveInStrictMode;
+        }
+        function updateStrictModeStatementList(statements) {
+            if (!inStrictMode) {
+                for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
+                    var statement = statements_1[_i];
+                    if (!ts.isPrologueDirective(statement)) {
+                        return;
+                    }
+                    if (isUseStrictPrologueDirective(statement)) {
+                        inStrictMode = true;
+                        return;
+                    }
+                }
+            }
+        }
+        function isUseStrictPrologueDirective(node) {
+            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
+            return nodeText === '"use strict"' || nodeText === "'use strict'";
+        }
+        function bindWorker(node) {
+            switch (node.kind) {
+                case 69:
+                case 97:
+                    if (currentFlow && (ts.isExpression(node) || parent.kind === 254)) {
+                        node.flowNode = currentFlow;
+                    }
+                    return checkStrictModeIdentifier(node);
+                case 172:
+                    if (currentFlow && isNarrowableReference(node)) {
+                        node.flowNode = currentFlow;
+                    }
+                    break;
+                case 187:
+                    if (ts.isInJavaScriptFile(node)) {
+                        var specialKind = ts.getSpecialPropertyAssignmentKind(node);
+                        switch (specialKind) {
+                            case 1:
+                                bindExportsPropertyAssignment(node);
+                                break;
+                            case 2:
+                                bindModuleExportsAssignment(node);
+                                break;
+                            case 3:
+                                bindPrototypePropertyAssignment(node);
+                                break;
+                            case 4:
+                                bindThisPropertyAssignment(node);
+                                break;
+                            case 0:
+                                break;
+                            default:
+                                ts.Debug.fail("Unknown special property assignment kind");
+                        }
+                    }
+                    return checkStrictModeBinaryExpression(node);
+                case 252:
+                    return checkStrictModeCatchClause(node);
+                case 181:
+                    return checkStrictModeDeleteExpression(node);
+                case 8:
+                    return checkStrictModeNumericLiteral(node);
+                case 186:
+                    return checkStrictModePostfixUnaryExpression(node);
+                case 185:
+                    return checkStrictModePrefixUnaryExpression(node);
+                case 212:
+                    return checkStrictModeWithStatement(node);
+                case 165:
+                    seenThisKeyword = true;
+                    return;
+                case 154:
+                    return checkTypePredicate(node);
+                case 141:
+                    return declareSymbolAndAddToSymbolTable(node, 262144, 530912);
+                case 142:
+                    return bindParameter(node);
+                case 218:
+                case 169:
+                    return bindVariableDeclarationOrBindingElement(node);
+                case 145:
+                case 144:
+                case 266:
+                    return bindPropertyOrMethodOrAccessor(node, 4 | (node.questionToken ? 536870912 : 0), 0);
+                case 280:
+                    return bindJSDocProperty(node);
+                case 253:
+                case 254:
+                    return bindPropertyOrMethodOrAccessor(node, 4, 0);
+                case 255:
+                    return bindPropertyOrMethodOrAccessor(node, 8, 107455);
+                case 247:
+                    emitFlags |= 1073741824;
+                    return;
+                case 151:
+                case 152:
+                case 153:
+                    return declareSymbolAndAddToSymbolTable(node, 131072, 0);
+                case 147:
+                case 146:
+                    return bindPropertyOrMethodOrAccessor(node, 8192 | (node.questionToken ? 536870912 : 0), ts.isObjectLiteralMethod(node) ? 0 : 99263);
+                case 220:
+                    return bindFunctionDeclaration(node);
+                case 148:
+                    return declareSymbolAndAddToSymbolTable(node, 16384, 0);
+                case 149:
+                    return bindPropertyOrMethodOrAccessor(node, 32768, 41919);
+                case 150:
+                    return bindPropertyOrMethodOrAccessor(node, 65536, 74687);
+                case 156:
+                case 157:
+                case 269:
+                    return bindFunctionOrConstructorType(node);
+                case 159:
+                case 281:
+                case 265:
+                    return bindAnonymousDeclaration(node, 2048, "__type");
+                case 171:
+                    return bindObjectLiteralExpression(node);
+                case 179:
+                case 180:
+                    return bindFunctionExpression(node);
+                case 174:
+                    if (ts.isInJavaScriptFile(node)) {
+                        bindCallExpression(node);
+                    }
+                    break;
+                case 192:
+                case 221:
+                    inStrictMode = true;
+                    return bindClassLikeDeclaration(node);
+                case 222:
+                    return bindBlockScopedDeclaration(node, 64, 792960);
+                case 279:
+                case 223:
+                    return bindBlockScopedDeclaration(node, 524288, 793056);
+                case 224:
+                    return bindEnumDeclaration(node);
+                case 225:
+                    return bindModuleDeclaration(node);
+                case 229:
+                case 232:
+                case 234:
+                case 238:
+                    return declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
+                case 228:
+                    return bindNamespaceExportDeclaration(node);
+                case 231:
+                    return bindImportClause(node);
+                case 236:
+                    return bindExportDeclaration(node);
+                case 235:
+                    return bindExportAssignment(node);
+                case 256:
+                    updateStrictModeStatementList(node.statements);
+                    return bindSourceFileIfExternalModule();
+                case 199:
+                    if (!ts.isFunctionLike(node.parent)) {
+                        return;
+                    }
+                case 226:
+                    return updateStrictModeStatementList(node.statements);
+            }
+        }
+        function checkTypePredicate(node) {
+            var parameterName = node.parameterName, type = node.type;
+            if (parameterName && parameterName.kind === 69) {
+                checkStrictModeIdentifier(parameterName);
+            }
+            if (parameterName && parameterName.kind === 165) {
+                seenThisKeyword = true;
+            }
+            bind(type);
+        }
+        function bindSourceFileIfExternalModule() {
+            setExportContextFlag(file);
+            if (ts.isExternalModule(file)) {
+                bindSourceFileAsExternalModule();
+            }
+        }
+        function bindSourceFileAsExternalModule() {
+            bindAnonymousDeclaration(file, 512, "\"" + ts.removeFileExtension(file.fileName) + "\"");
+        }
+        function bindExportAssignment(node) {
+            var boundExpression = node.kind === 235 ? node.expression : node.right;
+            if (!container.symbol || !container.symbol.exports) {
+                bindAnonymousDeclaration(node, 8388608, getDeclarationName(node));
+            }
+            else if (boundExpression.kind === 69 && node.kind === 235) {
+                declareSymbol(container.symbol.exports, container.symbol, node, 8388608, 0 | 8388608);
+            }
+            else {
+                declareSymbol(container.symbol.exports, container.symbol, node, 4, 0 | 8388608);
+            }
+        }
+        function bindNamespaceExportDeclaration(node) {
+            if (node.modifiers && node.modifiers.length) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
+            }
+            if (node.parent.kind !== 256) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
+                return;
+            }
+            else {
+                var parent_6 = node.parent;
+                if (!ts.isExternalModule(parent_6)) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
+                    return;
+                }
+                if (!parent_6.isDeclarationFile) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
+                    return;
+                }
+            }
+            file.symbol.globalExports = file.symbol.globalExports || {};
+            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608, 8388608);
+        }
+        function bindExportDeclaration(node) {
+            if (!container.symbol || !container.symbol.exports) {
+                bindAnonymousDeclaration(node, 1073741824, getDeclarationName(node));
+            }
+            else if (!node.exportClause) {
+                declareSymbol(container.symbol.exports, container.symbol, node, 1073741824, 0);
+            }
+        }
+        function bindImportClause(node) {
+            if (node.name) {
+                declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
+            }
+        }
+        function setCommonJsModuleIndicator(node) {
+            if (!file.commonJsModuleIndicator) {
+                file.commonJsModuleIndicator = node;
+                bindSourceFileAsExternalModule();
+            }
+        }
+        function bindExportsPropertyAssignment(node) {
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 | 7340032, 0);
+        }
+        function bindModuleExportsAssignment(node) {
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node, 4 | 7340032 | 512, 0);
+        }
+        function bindThisPropertyAssignment(node) {
+            var assignee;
+            if (container.kind === 220 || container.kind === 220) {
+                assignee = container;
+            }
+            else if (container.kind === 148) {
+                assignee = container.parent;
+            }
+            else {
+                return;
+            }
+            assignee.symbol.members = assignee.symbol.members || {};
+            declareSymbol(assignee.symbol.members, assignee.symbol, node, 4, 0 & ~4);
+        }
+        function bindPrototypePropertyAssignment(node) {
+            var leftSideOfAssignment = node.left;
+            var classPrototype = leftSideOfAssignment.expression;
+            var constructorFunction = classPrototype.expression;
+            leftSideOfAssignment.parent = node;
+            constructorFunction.parent = classPrototype;
+            classPrototype.parent = leftSideOfAssignment;
+            var funcSymbol = container.locals[constructorFunction.text];
+            if (!funcSymbol || !(funcSymbol.flags & 16)) {
+                return;
+            }
+            if (!funcSymbol.members) {
+                funcSymbol.members = {};
+            }
+            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4, 0);
+        }
+        function bindCallExpression(node) {
+            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, false)) {
+                setCommonJsModuleIndicator(node);
+            }
+        }
+        function bindClassLikeDeclaration(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.getClassExtendsHeritageClauseElement(node) !== undefined) {
+                    emitFlags |= 262144;
+                }
+                if (ts.nodeIsDecorated(node)) {
+                    emitFlags |= 524288;
+                }
+            }
+            if (node.kind === 221) {
+                bindBlockScopedDeclaration(node, 32, 899519);
+            }
+            else {
+                var bindingName = node.name ? node.name.text : "__class";
+                bindAnonymousDeclaration(node, 32, bindingName);
+                if (node.name) {
+                    classifiableNames[node.name.text] = node.name.text;
+                }
+            }
+            var symbol = node.symbol;
+            var prototypeSymbol = createSymbol(4 | 134217728, "prototype");
+            if (ts.hasProperty(symbol.exports, prototypeSymbol.name)) {
+                if (node.name) {
+                    node.name.parent = node;
+                }
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
+            }
+            symbol.exports[prototypeSymbol.name] = prototypeSymbol;
+            prototypeSymbol.parent = symbol;
+        }
+        function bindEnumDeclaration(node) {
+            return ts.isConst(node)
+                ? bindBlockScopedDeclaration(node, 128, 899967)
+                : bindBlockScopedDeclaration(node, 256, 899327);
+        }
+        function bindVariableDeclarationOrBindingElement(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (!ts.isBindingPattern(node.name)) {
+                if (ts.isBlockOrCatchScoped(node)) {
+                    bindBlockScopedVariableDeclaration(node);
+                }
+                else if (ts.isParameterDeclaration(node)) {
+                    declareSymbolAndAddToSymbolTable(node, 1, 107455);
+                }
+                else {
+                    declareSymbolAndAddToSymbolTable(node, 1, 107454);
+                }
+            }
+        }
+        function bindParameter(node) {
+            if (!ts.isDeclarationFile(file) &&
+                !ts.isInAmbientContext(node) &&
+                ts.nodeIsDecorated(node)) {
+                emitFlags |= (524288 | 1048576);
+            }
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (ts.isBindingPattern(node.name)) {
+                bindAnonymousDeclaration(node, 1, getDestructuringParameterName(node));
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 1, 107455);
+            }
+            if (ts.isParameterPropertyDeclaration(node)) {
+                var classDeclaration = node.parent.parent;
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 | (node.questionToken ? 536870912 : 0), 0);
+            }
+        }
+        function bindFunctionDeclaration(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152;
+                }
+            }
+            checkStrictModeFunctionName(node);
+            if (inStrictMode) {
+                checkStrictModeFunctionDeclaration(node);
+                bindBlockScopedDeclaration(node, 16, 106927);
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 16, 106927);
+            }
+        }
+        function bindFunctionExpression(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152;
+                }
+            }
+            if (currentFlow) {
+                node.flowNode = currentFlow;
+            }
+            checkStrictModeFunctionName(node);
+            var bindingName = node.name ? node.name.text : "__function";
+            return bindAnonymousDeclaration(node, 16, bindingName);
+        }
+        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152;
+                }
+                if (ts.nodeIsDecorated(node)) {
+                    emitFlags |= 524288;
+                }
+            }
+            return ts.hasDynamicName(node)
+                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
+                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
+        }
+        function bindJSDocProperty(node) {
+            return declareSymbolAndAddToSymbolTable(node, 4, 0);
+        }
+        function shouldReportErrorOnModuleDeclaration(node) {
+            var instanceState = getModuleInstanceState(node);
+            return instanceState === 1 || (instanceState === 2 && options.preserveConstEnums);
+        }
+        function checkUnreachable(node) {
+            if (!(currentFlow.flags & 1)) {
+                return false;
+            }
+            if (currentFlow === unreachableFlow) {
+                var reportError = (ts.isStatement(node) && node.kind !== 201) ||
+                    node.kind === 221 ||
+                    (node.kind === 225 && shouldReportErrorOnModuleDeclaration(node)) ||
+                    (node.kind === 224 && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
+                if (reportError) {
+                    currentFlow = reportedUnreachableFlow;
+                    var reportUnreachableCode = !options.allowUnreachableCode &&
+                        !ts.isInAmbientContext(node) &&
+                        (node.kind !== 200 ||
+                            ts.getCombinedNodeFlags(node.declarationList) & 3072 ||
+                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
+                    if (reportUnreachableCode) {
+                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
+                    }
+                }
+            }
+            return true;
+        }
+    }
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var nextSymbolId = 1;
+    var nextNodeId = 1;
+    var nextMergeId = 1;
+    var nextFlowId = 1;
+    function getNodeId(node) {
+        if (!node.id) {
+            node.id = nextNodeId;
+            nextNodeId++;
+        }
+        return node.id;
+    }
+    ts.getNodeId = getNodeId;
+    ts.checkTime = 0;
+    function getSymbolId(symbol) {
+        if (!symbol.id) {
+            symbol.id = nextSymbolId;
+            nextSymbolId++;
+        }
+        return symbol.id;
+    }
+    ts.getSymbolId = getSymbolId;
+    function createTypeChecker(host, produceDiagnostics) {
+        var cancellationToken;
+        var Symbol = ts.objectAllocator.getSymbolConstructor();
+        var Type = ts.objectAllocator.getTypeConstructor();
+        var Signature = ts.objectAllocator.getSignatureConstructor();
+        var typeCount = 0;
+        var symbolCount = 0;
+        var emptyArray = [];
+        var emptySymbols = {};
+        var compilerOptions = host.getCompilerOptions();
+        var languageVersion = compilerOptions.target || 0;
+        var modulekind = ts.getEmitModuleKind(compilerOptions);
+        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
+        var strictNullChecks = compilerOptions.strictNullChecks;
+        var emitResolver = createResolver();
+        var undefinedSymbol = createSymbol(4 | 67108864, "undefined");
+        undefinedSymbol.declarations = [];
+        var argumentsSymbol = createSymbol(4 | 67108864, "arguments");
+        var checker = {
+            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
+            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
+            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
+            getTypeCount: function () { return typeCount; },
+            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
+            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
+            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
+            getDiagnostics: getDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getTypeOfSymbolAtLocation: getTypeOfSymbolAtLocation,
+            getSymbolsOfParameterPropertyDeclaration: getSymbolsOfParameterPropertyDeclaration,
+            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
+            getPropertiesOfType: getPropertiesOfType,
+            getPropertyOfType: getPropertyOfType,
+            getSignaturesOfType: getSignaturesOfType,
+            getIndexTypeOfType: getIndexTypeOfType,
+            getBaseTypes: getBaseTypes,
+            getReturnTypeOfSignature: getReturnTypeOfSignature,
+            getNonNullableType: getNonNullableType,
+            getSymbolsInScope: getSymbolsInScope,
+            getSymbolAtLocation: getSymbolAtLocation,
+            getShorthandAssignmentValueSymbol: getShorthandAssignmentValueSymbol,
+            getExportSpecifierLocalTargetSymbol: getExportSpecifierLocalTargetSymbol,
+            getTypeAtLocation: getTypeOfNode,
+            getPropertySymbolOfDestructuringAssignment: getPropertySymbolOfDestructuringAssignment,
+            typeToString: typeToString,
+            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
+            symbolToString: symbolToString,
+            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
+            getRootSymbols: getRootSymbols,
+            getContextualType: getContextualType,
+            getFullyQualifiedName: getFullyQualifiedName,
+            getResolvedSignature: getResolvedSignature,
+            getConstantValue: getConstantValue,
+            isValidPropertyAccess: isValidPropertyAccess,
+            getSignatureFromDeclaration: getSignatureFromDeclaration,
+            isImplementationOfOverload: isImplementationOfOverload,
+            getAliasedSymbol: resolveAlias,
+            getEmitResolver: getEmitResolver,
+            getExportsOfModule: getExportsOfModuleAsArray,
+            getJsxElementAttributesType: getJsxElementAttributesType,
+            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
+            isOptionalParameter: isOptionalParameter
+        };
+        var unknownSymbol = createSymbol(4 | 67108864, "unknown");
+        var resolvingSymbol = createSymbol(67108864, "__resolving__");
+        var anyType = createIntrinsicType(1, "any");
+        var stringType = createIntrinsicType(2, "string");
+        var numberType = createIntrinsicType(4, "number");
+        var booleanType = createIntrinsicType(8, "boolean");
+        var esSymbolType = createIntrinsicType(16777216, "symbol");
+        var voidType = createIntrinsicType(16, "void");
+        var undefinedType = createIntrinsicType(32, "undefined");
+        var undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(32 | 2097152, "undefined");
+        var nullType = createIntrinsicType(64, "null");
+        var nullWideningType = strictNullChecks ? nullType : createIntrinsicType(64 | 2097152, "null");
+        var unknownType = createIntrinsicType(1, "unknown");
+        var neverType = createIntrinsicType(134217728, "never");
+        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        emptyGenericType.instantiations = {};
+        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        anyFunctionType.flags |= 8388608;
+        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, undefined, 0, false, false);
+        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, undefined, 0, false, false);
+        var enumNumberIndexInfo = createIndexInfo(stringType, true);
+        var globals = {};
+        var patternAmbientModules;
+        var getGlobalESSymbolConstructorSymbol;
+        var getGlobalPromiseConstructorSymbol;
+        var globalObjectType;
+        var globalFunctionType;
+        var globalArrayType;
+        var globalReadonlyArrayType;
+        var globalStringType;
+        var globalNumberType;
+        var globalBooleanType;
+        var globalRegExpType;
+        var anyArrayType;
+        var anyReadonlyArrayType;
+        var getGlobalTemplateStringsArrayType;
+        var getGlobalESSymbolType;
+        var getGlobalIterableType;
+        var getGlobalIteratorType;
+        var getGlobalIterableIteratorType;
+        var getGlobalClassDecoratorType;
+        var getGlobalParameterDecoratorType;
+        var getGlobalPropertyDecoratorType;
+        var getGlobalMethodDecoratorType;
+        var getGlobalTypedPropertyDescriptorType;
+        var getGlobalPromiseType;
+        var tryGetGlobalPromiseType;
+        var getGlobalPromiseLikeType;
+        var getInstantiatedGlobalPromiseLikeType;
+        var getGlobalPromiseConstructorLikeType;
+        var getGlobalThenableType;
+        var jsxElementClassType;
+        var deferredNodes;
+        var flowLoopStart = 0;
+        var flowLoopCount = 0;
+        var visitedFlowCount = 0;
+        var tupleTypes = {};
+        var unionTypes = {};
+        var intersectionTypes = {};
+        var stringLiteralTypes = {};
+        var resolutionTargets = [];
+        var resolutionResults = [];
+        var resolutionPropertyNames = [];
+        var mergedSymbols = [];
+        var symbolLinks = [];
+        var nodeLinks = [];
+        var flowLoopCaches = [];
+        var flowLoopNodes = [];
+        var flowLoopKeys = [];
+        var flowLoopTypes = [];
+        var visitedFlowNodes = [];
+        var visitedFlowTypes = [];
+        var potentialThisCollisions = [];
+        var awaitedTypeStack = [];
+        var diagnostics = ts.createDiagnosticCollection();
+        var typeofEQFacts = {
+            "string": 1,
+            "number": 2,
+            "boolean": 4,
+            "symbol": 8,
+            "undefined": 16384,
+            "object": 16,
+            "function": 32
+        };
+        var typeofNEFacts = {
+            "string": 128,
+            "number": 256,
+            "boolean": 512,
+            "symbol": 1024,
+            "undefined": 131072,
+            "object": 2048,
+            "function": 4096
+        };
+        var typeofTypesByName = {
+            "string": stringType,
+            "number": numberType,
+            "boolean": booleanType,
+            "symbol": esSymbolType,
+            "undefined": undefinedType
+        };
+        var jsxElementType;
+        var jsxTypes = {};
+        var JsxNames = {
+            JSX: "JSX",
+            IntrinsicElements: "IntrinsicElements",
+            ElementClass: "ElementClass",
+            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
+            Element: "Element",
+            IntrinsicAttributes: "IntrinsicAttributes",
+            IntrinsicClassAttributes: "IntrinsicClassAttributes"
+        };
+        var subtypeRelation = {};
+        var assignableRelation = {};
+        var comparableRelation = {};
+        var identityRelation = {};
+        var _displayBuilder;
+        var builtinGlobals = (_a = {},
+            _a[undefinedSymbol.name] = undefinedSymbol,
+            _a
+        );
+        initializeTypeChecker();
+        return checker;
+        function getEmitResolver(sourceFile, cancellationToken) {
+            getDiagnostics(sourceFile, cancellationToken);
+            return emitResolver;
+        }
+        function error(location, message, arg0, arg1, arg2) {
+            var diagnostic = location
+                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
+                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
+            diagnostics.add(diagnostic);
+        }
+        function createSymbol(flags, name) {
+            symbolCount++;
+            return new Symbol(flags, name);
+        }
+        function getExcludedSymbolFlags(flags) {
+            var result = 0;
+            if (flags & 2)
+                result |= 107455;
+            if (flags & 1)
+                result |= 107454;
+            if (flags & 4)
+                result |= 0;
+            if (flags & 8)
+                result |= 107455;
+            if (flags & 16)
+                result |= 106927;
+            if (flags & 32)
+                result |= 899519;
+            if (flags & 64)
+                result |= 792960;
+            if (flags & 256)
+                result |= 899327;
+            if (flags & 128)
+                result |= 899967;
+            if (flags & 512)
+                result |= 106639;
+            if (flags & 8192)
+                result |= 99263;
+            if (flags & 32768)
+                result |= 41919;
+            if (flags & 65536)
+                result |= 74687;
+            if (flags & 262144)
+                result |= 530912;
+            if (flags & 524288)
+                result |= 793056;
+            if (flags & 8388608)
+                result |= 8388608;
+            return result;
+        }
+        function recordMergedSymbol(target, source) {
+            if (!source.mergeId) {
+                source.mergeId = nextMergeId;
+                nextMergeId++;
+            }
+            mergedSymbols[source.mergeId] = target;
+        }
+        function cloneSymbol(symbol) {
+            var result = createSymbol(symbol.flags | 33554432, symbol.name);
+            result.declarations = symbol.declarations.slice(0);
+            result.parent = symbol.parent;
+            if (symbol.valueDeclaration)
+                result.valueDeclaration = symbol.valueDeclaration;
+            if (symbol.constEnumOnlyModule)
+                result.constEnumOnlyModule = true;
+            if (symbol.members)
+                result.members = cloneSymbolTable(symbol.members);
+            if (symbol.exports)
+                result.exports = cloneSymbolTable(symbol.exports);
+            recordMergedSymbol(result, symbol);
+            return result;
+        }
+        function mergeSymbol(target, source) {
+            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
+                if (source.flags & 512 && target.flags & 512 && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
+                    target.constEnumOnlyModule = false;
+                }
+                target.flags |= source.flags;
+                if (source.valueDeclaration &&
+                    (!target.valueDeclaration ||
+                        (target.valueDeclaration.kind === 225 && source.valueDeclaration.kind !== 225))) {
+                    target.valueDeclaration = source.valueDeclaration;
+                }
+                ts.forEach(source.declarations, function (node) {
+                    target.declarations.push(node);
+                });
+                if (source.members) {
+                    if (!target.members)
+                        target.members = {};
+                    mergeSymbolTable(target.members, source.members);
+                }
+                if (source.exports) {
+                    if (!target.exports)
+                        target.exports = {};
+                    mergeSymbolTable(target.exports, source.exports);
+                }
+                recordMergedSymbol(target, source);
+            }
+            else {
+                var message_2 = target.flags & 2 || source.flags & 2
+                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
+                ts.forEach(source.declarations, function (node) {
+                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                });
+                ts.forEach(target.declarations, function (node) {
+                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                });
+            }
+        }
+        function cloneSymbolTable(symbolTable) {
+            var result = {};
+            for (var id in symbolTable) {
+                if (ts.hasProperty(symbolTable, id)) {
+                    result[id] = symbolTable[id];
+                }
+            }
+            return result;
+        }
+        function mergeSymbolTable(target, source) {
+            for (var id in source) {
+                if (ts.hasProperty(source, id)) {
+                    if (!ts.hasProperty(target, id)) {
+                        target[id] = source[id];
+                    }
+                    else {
+                        var symbol = target[id];
+                        if (!(symbol.flags & 33554432)) {
+                            target[id] = symbol = cloneSymbol(symbol);
+                        }
+                        mergeSymbol(symbol, source[id]);
+                    }
+                }
+            }
+        }
+        function mergeModuleAugmentation(moduleName) {
+            var moduleAugmentation = moduleName.parent;
+            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
+                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
+                return;
+            }
+            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
+                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
+            }
+            else {
+                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
+                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
+                    : undefined;
+                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError);
+                if (!mainModule) {
+                    return;
+                }
+                mainModule = resolveExternalModuleSymbol(mainModule);
+                if (mainModule.flags & 1536) {
+                    mainModule = mainModule.flags & 33554432 ? mainModule : cloneSymbol(mainModule);
+                    mergeSymbol(mainModule, moduleAugmentation.symbol);
+                }
+                else {
+                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
+                }
+            }
+        }
+        function addToSymbolTable(target, source, message) {
+            for (var id in source) {
+                if (ts.hasProperty(source, id)) {
+                    if (ts.hasProperty(target, id)) {
+                        ts.forEach(target[id].declarations, addDeclarationDiagnostic(id, message));
+                    }
+                    else {
+                        target[id] = source[id];
+                    }
+                }
+            }
+            function addDeclarationDiagnostic(id, message) {
+                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
+            }
+        }
+        function getSymbolLinks(symbol) {
+            if (symbol.flags & 67108864)
+                return symbol;
+            var id = getSymbolId(symbol);
+            return symbolLinks[id] || (symbolLinks[id] = {});
+        }
+        function getNodeLinks(node) {
+            var nodeId = getNodeId(node);
+            return nodeLinks[nodeId] || (nodeLinks[nodeId] = {});
+        }
+        function isGlobalSourceFile(node) {
+            return node.kind === 256 && !ts.isExternalOrCommonJsModule(node);
+        }
+        function getSymbol(symbols, name, meaning) {
+            if (meaning && ts.hasProperty(symbols, name)) {
+                var symbol = symbols[name];
+                ts.Debug.assert((symbol.flags & 16777216) === 0, "Should never get an instantiated symbol here.");
+                if (symbol.flags & meaning) {
+                    return symbol;
+                }
+                if (symbol.flags & 8388608) {
+                    var target = resolveAlias(symbol);
+                    if (target === unknownSymbol || target.flags & meaning) {
+                        return symbol;
+                    }
+                }
+            }
+        }
+        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
+            var constructorDeclaration = parameter.parent;
+            var classDeclaration = parameter.parent.parent;
+            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455);
+            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455);
+            if (parameterSymbol && propertySymbol) {
+                return [parameterSymbol, propertySymbol];
+            }
+            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
+        }
+        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
+            var declarationFile = ts.getSourceFileOfNode(declaration);
+            var useFile = ts.getSourceFileOfNode(usage);
+            if (declarationFile !== useFile) {
+                if (modulekind || (!compilerOptions.outFile && !compilerOptions.out)) {
+                    return true;
+                }
+                var sourceFiles = host.getSourceFiles();
+                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
+            }
+            if (declaration.pos <= usage.pos) {
+                return declaration.kind !== 218 ||
+                    !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
+            }
+            return isUsedInFunctionOrNonStaticProperty(declaration, usage);
+            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
+                var container = ts.getEnclosingBlockScopeContainer(declaration);
+                switch (declaration.parent.parent.kind) {
+                    case 200:
+                    case 206:
+                    case 208:
+                        if (isSameScopeDescendentOf(usage, declaration, container)) {
+                            return true;
+                        }
+                        break;
+                }
+                switch (declaration.parent.parent.kind) {
+                    case 207:
+                    case 208:
+                        if (isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container)) {
+                            return true;
+                        }
+                }
+                return false;
+            }
+            function isUsedInFunctionOrNonStaticProperty(declaration, usage) {
+                var container = ts.getEnclosingBlockScopeContainer(declaration);
+                var current = usage;
+                while (current) {
+                    if (current === container) {
+                        return false;
+                    }
+                    if (ts.isFunctionLike(current)) {
+                        return true;
+                    }
+                    var initializerOfNonStaticProperty = current.parent &&
+                        current.parent.kind === 145 &&
+                        (current.parent.flags & 32) === 0 &&
+                        current.parent.initializer === current;
+                    if (initializerOfNonStaticProperty) {
+                        return true;
+                    }
+                    current = current.parent;
+                }
+                return false;
+            }
+        }
+        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg) {
+            var result;
+            var lastLocation;
+            var propertyWithInvalidInitializer;
+            var errorLocation = location;
+            var grandparent;
+            var isInExternalModule = false;
+            loop: while (location) {
+                if (location.locals && !isGlobalSourceFile(location)) {
+                    if (result = getSymbol(location.locals, name, meaning)) {
+                        var useResult = true;
+                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
+                            if (meaning & result.flags & 793056 && lastLocation.kind !== 273) {
+                                useResult = result.flags & 262144
+                                    ? lastLocation === location.type ||
+                                        lastLocation.kind === 142 ||
+                                        lastLocation.kind === 141
+                                    : false;
+                            }
+                            if (meaning & 107455 && result.flags & 1) {
+                                useResult =
+                                    lastLocation.kind === 142 ||
+                                        (lastLocation === location.type &&
+                                            result.valueDeclaration.kind === 142);
+                            }
+                        }
+                        if (useResult) {
+                            break loop;
+                        }
+                        else {
+                            result = undefined;
+                        }
+                    }
+                }
+                switch (location.kind) {
+                    case 256:
+                        if (!ts.isExternalOrCommonJsModule(location))
+                            break;
+                        isInExternalModule = true;
+                    case 225:
+                        var moduleExports = getSymbolOfNode(location).exports;
+                        if (location.kind === 256 || ts.isAmbientModule(location)) {
+                            if (result = moduleExports["default"]) {
+                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
+                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
+                                    break loop;
+                                }
+                                result = undefined;
+                            }
+                            if (ts.hasProperty(moduleExports, name) &&
+                                moduleExports[name].flags === 8388608 &&
+                                ts.getDeclarationOfKind(moduleExports[name], 238)) {
+                                break;
+                            }
+                        }
+                        if (result = getSymbol(moduleExports, name, meaning & 8914931)) {
+                            break loop;
+                        }
+                        break;
+                    case 224:
+                        if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & 8)) {
+                            break loop;
+                        }
+                        break;
+                    case 145:
+                    case 144:
+                        if (ts.isClassLike(location.parent) && !(location.flags & 32)) {
+                            var ctor = findConstructorDeclaration(location.parent);
+                            if (ctor && ctor.locals) {
+                                if (getSymbol(ctor.locals, name, meaning & 107455)) {
+                                    propertyWithInvalidInitializer = location;
+                                }
+                            }
+                        }
+                        break;
+                    case 221:
+                    case 192:
+                    case 222:
+                        if (result = getSymbol(getSymbolOfNode(location).members, name, meaning & 793056)) {
+                            if (lastLocation && lastLocation.flags & 32) {
+                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
+                                return undefined;
+                            }
+                            break loop;
+                        }
+                        if (location.kind === 192 && meaning & 32) {
+                            var className = location.name;
+                            if (className && name === className.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    case 140:
+                        grandparent = location.parent.parent;
+                        if (ts.isClassLike(grandparent) || grandparent.kind === 222) {
+                            if (result = getSymbol(getSymbolOfNode(grandparent).members, name, meaning & 793056)) {
+                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
+                                return undefined;
+                            }
+                        }
+                        break;
+                    case 147:
+                    case 146:
+                    case 148:
+                    case 149:
+                    case 150:
+                    case 220:
+                    case 180:
+                        if (meaning & 3 && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        break;
+                    case 179:
+                        if (meaning & 3 && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        if (meaning & 16) {
+                            var functionName = location.name;
+                            if (functionName && name === functionName.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    case 143:
+                        if (location.parent && location.parent.kind === 142) {
+                            location = location.parent;
+                        }
+                        if (location.parent && ts.isClassElement(location.parent)) {
+                            location = location.parent;
+                        }
+                        break;
+                }
+                lastLocation = location;
+                location = location.parent;
+            }
+            if (!result) {
+                result = getSymbol(globals, name, meaning);
+            }
+            if (!result) {
+                if (nameNotFoundMessage) {
+                    if (!checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg)) {
+                        error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                    }
+                }
+                return undefined;
+            }
+            if (nameNotFoundMessage) {
+                if (propertyWithInvalidInitializer) {
+                    var propertyName = propertyWithInvalidInitializer.name;
+                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                    return undefined;
+                }
+                if (meaning & 2) {
+                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
+                    if (exportOrLocalSymbol.flags & 2) {
+                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
+                    }
+                }
+                if (result && isInExternalModule) {
+                    var decls = result.declarations;
+                    if (decls && decls.length === 1 && decls[0].kind === 228) {
+                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
+                    }
+                }
+            }
+            return result;
+        }
+        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
+            if (!errorLocation || (errorLocation.kind === 69 && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
+                return false;
+            }
+            var container = ts.getThisContainer(errorLocation, true);
+            var location = container;
+            while (location) {
+                if (ts.isClassLike(location.parent)) {
+                    var classSymbol = getSymbolOfNode(location.parent);
+                    if (!classSymbol) {
+                        break;
+                    }
+                    var constructorType = getTypeOfSymbol(classSymbol);
+                    if (getPropertyOfType(constructorType, name)) {
+                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
+                        return true;
+                    }
+                    if (location === container && !(location.flags & 32)) {
+                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
+                        if (getPropertyOfType(instanceType, name)) {
+                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                            return true;
+                        }
+                    }
+                }
+                location = location.parent;
+            }
+            return false;
+        }
+        function checkResolvedBlockScopedVariable(result, errorLocation) {
+            ts.Debug.assert((result.flags & 2) !== 0);
+            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) ? d : undefined; });
+            ts.Debug.assert(declaration !== undefined, "Block-scoped variable declaration is undefined");
+            if (!isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 218), errorLocation)) {
+                error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+            }
+        }
+        function isSameScopeDescendentOf(initial, parent, stopAt) {
+            if (!parent) {
+                return false;
+            }
+            for (var current = initial; current && current !== stopAt && !ts.isFunctionLike(current); current = current.parent) {
+                if (current === parent) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function getAnyImportSyntax(node) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                if (node.kind === 229) {
+                    return node;
+                }
+                while (node && node.kind !== 230) {
+                    node = node.parent;
+                }
+                return node;
+            }
+        }
+        function getDeclarationOfAliasSymbol(symbol) {
+            return ts.forEach(symbol.declarations, function (d) { return ts.isAliasSymbolDeclaration(d) ? d : undefined; });
+        }
+        function getTargetOfImportEqualsDeclaration(node) {
+            if (node.moduleReference.kind === 240) {
+                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
+            }
+            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, node);
+        }
+        function getTargetOfImportClause(node) {
+            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
+            if (moduleSymbol) {
+                var exportDefaultSymbol = moduleSymbol.exports["export="] ?
+                    getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
+                    resolveSymbol(moduleSymbol.exports["default"]);
+                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
+                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
+                }
+                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
+                    return resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
+                }
+                return exportDefaultSymbol;
+            }
+        }
+        function getTargetOfNamespaceImport(node) {
+            var moduleSpecifier = node.parent.parent.moduleSpecifier;
+            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier);
+        }
+        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
+            if (valueSymbol.flags & (793056 | 1536)) {
+                return valueSymbol;
+            }
+            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
+            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
+            result.parent = valueSymbol.parent || typeSymbol.parent;
+            if (valueSymbol.valueDeclaration)
+                result.valueDeclaration = valueSymbol.valueDeclaration;
+            if (typeSymbol.members)
+                result.members = typeSymbol.members;
+            if (valueSymbol.exports)
+                result.exports = valueSymbol.exports;
+            return result;
+        }
+        function getExportOfModule(symbol, name) {
+            if (symbol.flags & 1536) {
+                var exports_1 = getExportsOfSymbol(symbol);
+                if (ts.hasProperty(exports_1, name)) {
+                    return resolveSymbol(exports_1[name]);
+                }
+            }
+        }
+        function getPropertyOfVariable(symbol, name) {
+            if (symbol.flags & 3) {
+                var typeAnnotation = symbol.valueDeclaration.type;
+                if (typeAnnotation) {
+                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
+                }
+            }
+        }
+        function getExternalModuleMember(node, specifier) {
+            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier);
+            if (targetSymbol) {
+                var name_10 = specifier.propertyName || specifier.name;
+                if (name_10.text) {
+                    var symbolFromVariable = void 0;
+                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
+                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_10.text);
+                    }
+                    else {
+                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_10.text);
+                    }
+                    symbolFromVariable = resolveSymbol(symbolFromVariable);
+                    var symbolFromModule = getExportOfModule(targetSymbol, name_10.text);
+                    var symbol = symbolFromModule && symbolFromVariable ?
+                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
+                        symbolFromModule || symbolFromVariable;
+                    if (!symbol) {
+                        error(name_10, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_10));
+                    }
+                    return symbol;
+                }
+            }
+        }
+        function getTargetOfImportSpecifier(node) {
+            return getExternalModuleMember(node.parent.parent.parent, node);
+        }
+        function getTargetOfGlobalModuleExportDeclaration(node) {
+            return resolveExternalModuleSymbol(node.parent.symbol);
+        }
+        function getTargetOfExportSpecifier(node) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node) :
+                resolveEntityName(node.propertyName || node.name, 107455 | 793056 | 1536);
+        }
+        function getTargetOfExportAssignment(node) {
+            return resolveEntityName(node.expression, 107455 | 793056 | 1536);
+        }
+        function getTargetOfAliasDeclaration(node) {
+            switch (node.kind) {
+                case 229:
+                    return getTargetOfImportEqualsDeclaration(node);
+                case 231:
+                    return getTargetOfImportClause(node);
+                case 232:
+                    return getTargetOfNamespaceImport(node);
+                case 234:
+                    return getTargetOfImportSpecifier(node);
+                case 238:
+                    return getTargetOfExportSpecifier(node);
+                case 235:
+                    return getTargetOfExportAssignment(node);
+                case 228:
+                    return getTargetOfGlobalModuleExportDeclaration(node);
+            }
+        }
+        function resolveSymbol(symbol) {
+            return symbol && symbol.flags & 8388608 && !(symbol.flags & (107455 | 793056 | 1536)) ? resolveAlias(symbol) : symbol;
+        }
+        function resolveAlias(symbol) {
+            ts.Debug.assert((symbol.flags & 8388608) !== 0, "Should only get Alias here.");
+            var links = getSymbolLinks(symbol);
+            if (!links.target) {
+                links.target = resolvingSymbol;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                var target = getTargetOfAliasDeclaration(node);
+                if (links.target === resolvingSymbol) {
+                    links.target = target || unknownSymbol;
+                }
+                else {
+                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
+                }
+            }
+            else if (links.target === resolvingSymbol) {
+                links.target = unknownSymbol;
+            }
+            return links.target;
+        }
+        function markExportAsReferenced(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target) {
+                var markAlias = target === unknownSymbol ||
+                    ((target.flags & 107455) && !isConstEnumOrConstEnumOnlyModule(target));
+                if (markAlias) {
+                    markAliasSymbolAsReferenced(symbol);
+                }
+            }
+        }
+        function markAliasSymbolAsReferenced(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.referenced) {
+                links.referenced = true;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                if (node.kind === 235) {
+                    checkExpressionCached(node.expression);
+                }
+                else if (node.kind === 238) {
+                    checkExpressionCached(node.propertyName || node.name);
+                }
+                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    checkExpressionCached(node.moduleReference);
+                }
+            }
+        }
+        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importDeclaration, dontResolveAlias) {
+            if (entityName.kind === 69 && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            if (entityName.kind === 69 || entityName.parent.kind === 139) {
+                return resolveEntityName(entityName, 1536, false, dontResolveAlias);
+            }
+            else {
+                ts.Debug.assert(entityName.parent.kind === 229);
+                return resolveEntityName(entityName, 107455 | 793056 | 1536, false, dontResolveAlias);
+            }
+        }
+        function getFullyQualifiedName(symbol) {
+            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
+        }
+        function resolveEntityName(name, meaning, ignoreErrors, dontResolveAlias) {
+            if (ts.nodeIsMissing(name)) {
+                return undefined;
+            }
+            var symbol;
+            if (name.kind === 69) {
+                var message = meaning === 1536 ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
+                symbol = resolveName(name, name.text, meaning, ignoreErrors ? undefined : message, name);
+                if (!symbol) {
+                    return undefined;
+                }
+            }
+            else if (name.kind === 139 || name.kind === 172) {
+                var left = name.kind === 139 ? name.left : name.expression;
+                var right = name.kind === 139 ? name.right : name.name;
+                var namespace = resolveEntityName(left, 1536, ignoreErrors);
+                if (!namespace || namespace === unknownSymbol || ts.nodeIsMissing(right)) {
+                    return undefined;
+                }
+                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
+                if (!symbol) {
+                    if (!ignoreErrors) {
+                        error(right, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
+                    }
+                    return undefined;
+                }
+            }
+            else {
+                ts.Debug.fail("Unknown entity name kind.");
+            }
+            ts.Debug.assert((symbol.flags & 16777216) === 0, "Should never get an instantiated symbol here.");
+            return (symbol.flags & meaning) || dontResolveAlias ? symbol : resolveAlias(symbol);
+        }
+        function resolveExternalModuleName(location, moduleReferenceExpression) {
+            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
+        }
+        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError) {
+            if (moduleReferenceExpression.kind !== 9) {
+                return;
+            }
+            var moduleReferenceLiteral = moduleReferenceExpression;
+            var moduleName = ts.escapeIdentifier(moduleReferenceLiteral.text);
+            if (moduleName === undefined) {
+                return;
+            }
+            var isRelative = ts.isExternalModuleNameRelative(moduleName);
+            if (!isRelative) {
+                var symbol = getSymbol(globals, '"' + moduleName + '"', 512);
+                if (symbol) {
+                    return getMergedSymbol(symbol);
+                }
+            }
+            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReferenceLiteral.text);
+            var sourceFile = resolvedModule && host.getSourceFile(resolvedModule.resolvedFileName);
+            if (sourceFile) {
+                if (sourceFile.symbol) {
+                    return getMergedSymbol(sourceFile.symbol);
+                }
+                if (moduleNotFoundError) {
+                    error(moduleReferenceLiteral, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
+                }
+                return undefined;
+            }
+            if (patternAmbientModules) {
+                var pattern = ts.findBestPatternMatch(patternAmbientModules, function (_) { return _.pattern; }, moduleName);
+                if (pattern) {
+                    return getMergedSymbol(pattern.symbol);
+                }
+            }
+            if (moduleNotFoundError) {
+                error(moduleReferenceLiteral, moduleNotFoundError, moduleName);
+            }
+            return undefined;
+        }
+        function resolveExternalModuleSymbol(moduleSymbol) {
+            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports["export="])) || moduleSymbol;
+        }
+        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression) {
+            var symbol = resolveExternalModuleSymbol(moduleSymbol);
+            if (symbol && !(symbol.flags & (1536 | 3))) {
+                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
+                symbol = undefined;
+            }
+            return symbol;
+        }
+        function hasExportAssignmentSymbol(moduleSymbol) {
+            return moduleSymbol.exports["export="] !== undefined;
+        }
+        function getExportsOfModuleAsArray(moduleSymbol) {
+            return symbolsToArray(getExportsOfModule(moduleSymbol));
+        }
+        function getExportsOfSymbol(symbol) {
+            return symbol.flags & 1536 ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
+        }
+        function getExportsOfModule(moduleSymbol) {
+            var links = getSymbolLinks(moduleSymbol);
+            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
+        }
+        function extendExportSymbols(target, source, lookupTable, exportNode) {
+            for (var id in source) {
+                if (id !== "default" && !ts.hasProperty(target, id)) {
+                    target[id] = source[id];
+                    if (lookupTable && exportNode) {
+                        lookupTable[id] = {
+                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
+                        };
+                    }
+                }
+                else if (lookupTable && exportNode && id !== "default" && ts.hasProperty(target, id) && resolveSymbol(target[id]) !== resolveSymbol(source[id])) {
+                    if (!lookupTable[id].exportsWithDuplicate) {
+                        lookupTable[id].exportsWithDuplicate = [exportNode];
+                    }
+                    else {
+                        lookupTable[id].exportsWithDuplicate.push(exportNode);
+                    }
+                }
+            }
+        }
+        function getExportsForModule(moduleSymbol) {
+            var visitedSymbols = [];
+            return visit(moduleSymbol) || moduleSymbol.exports;
+            function visit(symbol) {
+                if (!(symbol && symbol.flags & 1952 && !ts.contains(visitedSymbols, symbol))) {
+                    return;
+                }
+                visitedSymbols.push(symbol);
+                var symbols = cloneSymbolTable(symbol.exports);
+                var exportStars = symbol.exports["__export"];
+                if (exportStars) {
+                    var nestedSymbols = {};
+                    var lookupTable = {};
+                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
+                        var node = _a[_i];
+                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
+                        var exportedSymbols = visit(resolvedModule);
+                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable, node);
+                    }
+                    for (var id in lookupTable) {
+                        var exportsWithDuplicate = lookupTable[id].exportsWithDuplicate;
+                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || ts.hasProperty(symbols, id)) {
+                            continue;
+                        }
+                        for (var _b = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _b < exportsWithDuplicate_1.length; _b++) {
+                            var node = exportsWithDuplicate_1[_b];
+                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable[id].specifierText, id));
+                        }
+                    }
+                    extendExportSymbols(symbols, nestedSymbols);
+                }
+                return symbols;
+            }
+        }
+        function getMergedSymbol(symbol) {
+            var merged;
+            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
+        }
+        function getSymbolOfNode(node) {
+            return getMergedSymbol(node.symbol);
+        }
+        function getParentOfSymbol(symbol) {
+            return getMergedSymbol(symbol.parent);
+        }
+        function getExportSymbolOfValueSymbolIfExported(symbol) {
+            return symbol && (symbol.flags & 1048576) !== 0
+                ? getMergedSymbol(symbol.exportSymbol)
+                : symbol;
+        }
+        function symbolIsValue(symbol) {
+            if (symbol.flags & 16777216) {
+                return symbolIsValue(getSymbolLinks(symbol).target);
+            }
+            if (symbol.flags & 107455) {
+                return true;
+            }
+            if (symbol.flags & 8388608) {
+                return (resolveAlias(symbol).flags & 107455) !== 0;
+            }
+            return false;
+        }
+        function findConstructorDeclaration(node) {
+            var members = node.members;
+            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
+                var member = members_1[_i];
+                if (member.kind === 148 && ts.nodeIsPresent(member.body)) {
+                    return member;
+                }
+            }
+        }
+        function createType(flags) {
+            var result = new Type(checker, flags);
+            result.id = typeCount;
+            typeCount++;
+            return result;
+        }
+        function createIntrinsicType(kind, intrinsicName) {
+            var type = createType(kind);
+            type.intrinsicName = intrinsicName;
+            return type;
+        }
+        function createObjectType(kind, symbol) {
+            var type = createType(kind);
+            type.symbol = symbol;
+            return type;
+        }
+        function isReservedMemberName(name) {
+            return name.charCodeAt(0) === 95 &&
+                name.charCodeAt(1) === 95 &&
+                name.charCodeAt(2) !== 95 &&
+                name.charCodeAt(2) !== 64;
+        }
+        function getNamedMembers(members) {
+            var result;
+            for (var id in members) {
+                if (ts.hasProperty(members, id)) {
+                    if (!isReservedMemberName(id)) {
+                        if (!result)
+                            result = [];
+                        var symbol = members[id];
+                        if (symbolIsValue(symbol)) {
+                            result.push(symbol);
+                        }
+                    }
+                }
+            }
+            return result || emptyArray;
+        }
+        function setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            type.members = members;
+            type.properties = getNamedMembers(members);
+            type.callSignatures = callSignatures;
+            type.constructSignatures = constructSignatures;
+            if (stringIndexInfo)
+                type.stringIndexInfo = stringIndexInfo;
+            if (numberIndexInfo)
+                type.numberIndexInfo = numberIndexInfo;
+            return type;
+        }
+        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            return setObjectTypeMembers(createObjectType(65536, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
+            var result;
+            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
+                if (location_1.locals && !isGlobalSourceFile(location_1)) {
+                    if (result = callback(location_1.locals)) {
+                        return result;
+                    }
+                }
+                switch (location_1.kind) {
+                    case 256:
+                        if (!ts.isExternalOrCommonJsModule(location_1)) {
+                            break;
+                        }
+                    case 225:
+                        if (result = callback(getSymbolOfNode(location_1).exports)) {
+                            return result;
+                        }
+                        break;
+                }
+            }
+            return callback(globals);
+        }
+        function getQualifiedLeftMeaning(rightMeaning) {
+            return rightMeaning === 107455 ? 107455 : 1536;
+        }
+        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
+            function getAccessibleSymbolChainFromSymbolTable(symbols) {
+                function canQualifySymbol(symbolFromSymbolTable, meaning) {
+                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
+                        return true;
+                    }
+                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
+                    return !!accessibleParent;
+                }
+                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
+                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
+                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
+                            canQualifySymbol(symbolFromSymbolTable, meaning);
+                    }
+                }
+                if (isAccessible(ts.lookUp(symbols, symbol.name))) {
+                    return [symbol];
+                }
+                return ts.forEachValue(symbols, function (symbolFromSymbolTable) {
+                    if (symbolFromSymbolTable.flags & 8388608
+                        && symbolFromSymbolTable.name !== "export="
+                        && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238)) {
+                        if (!useOnlyExternalAliasing ||
+                            ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
+                            var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
+                            if (isAccessible(symbolFromSymbolTable, resolveAlias(symbolFromSymbolTable))) {
+                                return [symbolFromSymbolTable];
+                            }
+                            var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTable(resolvedImportedSymbol.exports) : undefined;
+                            if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
+                                return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
+                            }
+                        }
+                    }
+                });
+            }
+            if (symbol) {
+                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
+                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
+                }
+            }
+        }
+        function needsQualification(symbol, enclosingDeclaration, meaning) {
+            var qualify = false;
+            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
+                if (!ts.hasProperty(symbolTable, symbol.name)) {
+                    return false;
+                }
+                var symbolFromSymbolTable = symbolTable[symbol.name];
+                if (symbolFromSymbolTable === symbol) {
+                    return true;
+                }
+                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
+                if (symbolFromSymbolTable.flags & meaning) {
+                    qualify = true;
+                    return true;
+                }
+                return false;
+            });
+            return qualify;
+        }
+        function isPropertyOrMethodDeclarationSymbol(symbol) {
+            if (symbol.declarations && symbol.declarations.length) {
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    switch (declaration.kind) {
+                        case 145:
+                        case 147:
+                        case 149:
+                        case 150:
+                            continue;
+                        default:
+                            return false;
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function isSymbolAccessible(symbol, enclosingDeclaration, meaning) {
+            if (symbol && enclosingDeclaration && !(symbol.flags & 262144)) {
+                var initialSymbol = symbol;
+                var meaningToLook = meaning;
+                while (symbol) {
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, false);
+                    if (accessibleSymbolChain) {
+                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0]);
+                        if (!hasAccessibleDeclarations) {
+                            return {
+                                accessibility: 1,
+                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1536) : undefined
+                            };
+                        }
+                        return hasAccessibleDeclarations;
+                    }
+                    meaningToLook = getQualifiedLeftMeaning(meaning);
+                    symbol = getParentOfSymbol(symbol);
+                }
+                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
+                if (symbolExternalModule) {
+                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
+                    if (symbolExternalModule !== enclosingExternalModule) {
+                        return {
+                            accessibility: 2,
+                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                            errorModuleName: symbolToString(symbolExternalModule)
+                        };
+                    }
+                }
+                return {
+                    accessibility: 1,
+                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning)
+                };
+            }
+            return { accessibility: 0 };
+            function getExternalModuleContainer(declaration) {
+                for (; declaration; declaration = declaration.parent) {
+                    if (hasExternalModuleSymbol(declaration)) {
+                        return getSymbolOfNode(declaration);
+                    }
+                }
+            }
+        }
+        function hasExternalModuleSymbol(declaration) {
+            return ts.isAmbientModule(declaration) || (declaration.kind === 256 && ts.isExternalOrCommonJsModule(declaration));
+        }
+        function hasVisibleDeclarations(symbol) {
+            var aliasesToMakeVisible;
+            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
+                return undefined;
+            }
+            return { accessibility: 0, aliasesToMakeVisible: aliasesToMakeVisible };
+            function getIsDeclarationVisible(declaration) {
+                if (!isDeclarationVisible(declaration)) {
+                    var anyImportSyntax = getAnyImportSyntax(declaration);
+                    if (anyImportSyntax &&
+                        !(anyImportSyntax.flags & 1) &&
+                        isDeclarationVisible(anyImportSyntax.parent)) {
+                        getNodeLinks(declaration).isVisible = true;
+                        if (aliasesToMakeVisible) {
+                            if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
+                                aliasesToMakeVisible.push(anyImportSyntax);
+                            }
+                        }
+                        else {
+                            aliasesToMakeVisible = [anyImportSyntax];
+                        }
+                        return true;
+                    }
+                    return false;
+                }
+                return true;
+            }
+        }
+        function isEntityNameVisible(entityName, enclosingDeclaration) {
+            var meaning;
+            if (entityName.parent.kind === 158 || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                meaning = 107455 | 1048576;
+            }
+            else if (entityName.kind === 139 || entityName.kind === 172 ||
+                entityName.parent.kind === 229) {
+                meaning = 1536;
+            }
+            else {
+                meaning = 793056;
+            }
+            var firstIdentifier = getFirstIdentifier(entityName);
+            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, undefined, undefined);
+            return (symbol && hasVisibleDeclarations(symbol)) || {
+                accessibility: 1,
+                errorSymbolName: ts.getTextOfNode(firstIdentifier),
+                errorNode: firstIdentifier
+            };
+        }
+        function writeKeyword(writer, kind) {
+            writer.writeKeyword(ts.tokenToString(kind));
+        }
+        function writePunctuation(writer, kind) {
+            writer.writePunctuation(ts.tokenToString(kind));
+        }
+        function writeSpace(writer) {
+            writer.writeSpace(" ");
+        }
+        function symbolToString(symbol, enclosingDeclaration, meaning) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function signatureToString(signature, enclosingDeclaration, flags, kind) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function typeToString(type, enclosingDeclaration, flags) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            var maxLength = compilerOptions.noErrorTruncation || flags & 4 ? undefined : 100;
+            if (maxLength && result.length >= maxLength) {
+                result = result.substr(0, maxLength - "...".length) + "...";
+            }
+            return result;
+        }
+        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function visibilityToString(flags) {
+            if (flags === 8) {
+                return "private";
+            }
+            if (flags === 16) {
+                return "protected";
+            }
+            return "public";
+        }
+        function getTypeAliasForTypeLiteral(type) {
+            if (type.symbol && type.symbol.flags & 2048) {
+                var node = type.symbol.declarations[0].parent;
+                while (node.kind === 164) {
+                    node = node.parent;
+                }
+                if (node.kind === 223) {
+                    return getSymbolOfNode(node);
+                }
+            }
+            return undefined;
+        }
+        function isTopLevelInExternalModuleAugmentation(node) {
+            return node && node.parent &&
+                node.parent.kind === 226 &&
+                ts.isExternalModuleAugmentation(node.parent.parent);
+        }
+        function getSymbolDisplayBuilder() {
+            function getNameOfSymbol(symbol) {
+                if (symbol.declarations && symbol.declarations.length) {
+                    var declaration = symbol.declarations[0];
+                    if (declaration.name) {
+                        return ts.declarationNameToString(declaration.name);
+                    }
+                    switch (declaration.kind) {
+                        case 192:
+                            return "(Anonymous class)";
+                        case 179:
+                        case 180:
+                            return "(Anonymous function)";
+                    }
+                }
+                return symbol.name;
+            }
+            function appendSymbolNameOnly(symbol, writer) {
+                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
+            }
+            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
+                var symbolName = getNameOfSymbol(symbol);
+                var firstChar = symbolName.charCodeAt(0);
+                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
+                if (needsElementAccess) {
+                    writePunctuation(writer, 19);
+                    if (ts.isSingleOrDoubleQuote(firstChar)) {
+                        writer.writeStringLiteral(symbolName);
+                    }
+                    else {
+                        writer.writeSymbol(symbolName, symbol);
+                    }
+                    writePunctuation(writer, 20);
+                }
+                else {
+                    writePunctuation(writer, 21);
+                    writer.writeSymbol(symbolName, symbol);
+                }
+            }
+            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
+                var parentSymbol;
+                function appendParentTypeArgumentsAndSymbolName(symbol) {
+                    if (parentSymbol) {
+                        if (flags & 1) {
+                            if (symbol.flags & 16777216) {
+                                buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration);
+                            }
+                            else {
+                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
+                            }
+                        }
+                        appendPropertyOrElementAccessForSymbol(symbol, writer);
+                    }
+                    else {
+                        appendSymbolNameOnly(symbol, writer);
+                    }
+                    parentSymbol = symbol;
+                }
+                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
+                function walkSymbol(symbol, meaning) {
+                    if (symbol) {
+                        var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2));
+                        if (!accessibleSymbolChain ||
+                            needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
+                            walkSymbol(getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol), getQualifiedLeftMeaning(meaning));
+                        }
+                        if (accessibleSymbolChain) {
+                            for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
+                                var accessibleSymbol = accessibleSymbolChain_1[_i];
+                                appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
+                            }
+                        }
+                        else {
+                            if (!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) {
+                                return;
+                            }
+                            if (symbol.flags & 2048 || symbol.flags & 4096) {
+                                return;
+                            }
+                            appendParentTypeArgumentsAndSymbolName(symbol);
+                        }
+                    }
+                }
+                var isTypeParameter = symbol.flags & 262144;
+                var typeFormatFlag = 128 & typeFlags;
+                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
+                    walkSymbol(symbol, meaning);
+                    return;
+                }
+                return appendParentTypeArgumentsAndSymbolName(symbol);
+            }
+            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
+                var globalFlagsToPass = globalFlags & 16;
+                var inObjectTypeLiteral = false;
+                return writeType(type, globalFlags);
+                function writeType(type, flags) {
+                    if (type.flags & 150995071) {
+                        writer.writeKeyword(!(globalFlags & 16) && isTypeAny(type)
+                            ? "any"
+                            : type.intrinsicName);
+                    }
+                    else if (type.flags & 33554432) {
+                        if (inObjectTypeLiteral) {
+                            writer.reportInaccessibleThisError();
+                        }
+                        writer.writeKeyword("this");
+                    }
+                    else if (type.flags & 4096) {
+                        writeTypeReference(type, flags);
+                    }
+                    else if (type.flags & (1024 | 2048 | 128 | 512)) {
+                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793056, 0, flags);
+                    }
+                    else if (type.flags & 8192) {
+                        writeTupleType(type);
+                    }
+                    else if (type.flags & 49152) {
+                        writeUnionOrIntersectionType(type, flags);
+                    }
+                    else if (type.flags & 65536) {
+                        writeAnonymousType(type, flags);
+                    }
+                    else if (type.flags & 256) {
+                        writer.writeStringLiteral("\"" + ts.escapeString(type.text) + "\"");
+                    }
+                    else {
+                        writePunctuation(writer, 15);
+                        writeSpace(writer);
+                        writePunctuation(writer, 22);
+                        writeSpace(writer);
+                        writePunctuation(writer, 16);
+                    }
+                }
+                function writeTypeList(types, delimiter) {
+                    for (var i = 0; i < types.length; i++) {
+                        if (i > 0) {
+                            if (delimiter !== 24) {
+                                writeSpace(writer);
+                            }
+                            writePunctuation(writer, delimiter);
+                            writeSpace(writer);
+                        }
+                        writeType(types[i], delimiter === 24 ? 0 : 64);
+                    }
+                }
+                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
+                    if (symbol.flags & 32 || !isReservedMemberName(symbol.name)) {
+                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793056, 0, flags);
+                    }
+                    if (pos < end) {
+                        writePunctuation(writer, 25);
+                        writeType(typeArguments[pos], 256);
+                        pos++;
+                        while (pos < end) {
+                            writePunctuation(writer, 24);
+                            writeSpace(writer);
+                            writeType(typeArguments[pos], 0);
+                            pos++;
+                        }
+                        writePunctuation(writer, 27);
+                    }
+                }
+                function writeTypeReference(type, flags) {
+                    var typeArguments = type.typeArguments || emptyArray;
+                    if (type.target === globalArrayType && !(flags & 1)) {
+                        writeType(typeArguments[0], 64);
+                        writePunctuation(writer, 19);
+                        writePunctuation(writer, 20);
+                    }
+                    else {
+                        var outerTypeParameters = type.target.outerTypeParameters;
+                        var i = 0;
+                        if (outerTypeParameters) {
+                            var length_1 = outerTypeParameters.length;
+                            while (i < length_1) {
+                                var start = i;
+                                var parent_7 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
+                                do {
+                                    i++;
+                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_7);
+                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
+                                    writeSymbolTypeReference(parent_7, typeArguments, start, i, flags);
+                                    writePunctuation(writer, 21);
+                                }
+                            }
+                        }
+                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
+                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
+                    }
+                }
+                function writeTupleType(type) {
+                    writePunctuation(writer, 19);
+                    writeTypeList(type.elementTypes, 24);
+                    writePunctuation(writer, 20);
+                }
+                function writeUnionOrIntersectionType(type, flags) {
+                    if (flags & 64) {
+                        writePunctuation(writer, 17);
+                    }
+                    writeTypeList(type.types, type.flags & 16384 ? 47 : 46);
+                    if (flags & 64) {
+                        writePunctuation(writer, 18);
+                    }
+                }
+                function writeAnonymousType(type, flags) {
+                    var symbol = type.symbol;
+                    if (symbol) {
+                        if (symbol.flags & (32 | 384 | 512)) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (shouldWriteTypeOfFunctionSymbol()) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (ts.contains(symbolStack, symbol)) {
+                            var typeAlias = getTypeAliasForTypeLiteral(type);
+                            if (typeAlias) {
+                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793056, 0, flags);
+                            }
+                            else {
+                                writeKeyword(writer, 117);
+                            }
+                        }
+                        else {
+                            if (!symbolStack) {
+                                symbolStack = [];
+                            }
+                            symbolStack.push(symbol);
+                            writeLiteralType(type, flags);
+                            symbolStack.pop();
+                        }
+                    }
+                    else {
+                        writeLiteralType(type, flags);
+                    }
+                    function shouldWriteTypeOfFunctionSymbol() {
+                        var isStaticMethodSymbol = !!(symbol.flags & 8192 &&
+                            ts.forEach(symbol.declarations, function (declaration) { return declaration.flags & 32; }));
+                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16) &&
+                            (symbol.parent ||
+                                ts.forEach(symbol.declarations, function (declaration) {
+                                    return declaration.parent.kind === 256 || declaration.parent.kind === 226;
+                                }));
+                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
+                            return !!(flags & 2) ||
+                                (ts.contains(symbolStack, symbol));
+                        }
+                    }
+                }
+                function writeTypeOfSymbol(type, typeFormatFlags) {
+                    writeKeyword(writer, 101);
+                    writeSpace(writer);
+                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455, 0, typeFormatFlags);
+                }
+                function writeIndexSignature(info, keyword) {
+                    if (info) {
+                        if (info.isReadonly) {
+                            writeKeyword(writer, 128);
+                            writeSpace(writer);
+                        }
+                        writePunctuation(writer, 19);
+                        writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
+                        writePunctuation(writer, 54);
+                        writeSpace(writer);
+                        writeKeyword(writer, keyword);
+                        writePunctuation(writer, 20);
+                        writePunctuation(writer, 54);
+                        writeSpace(writer);
+                        writeType(info.type, 0);
+                        writePunctuation(writer, 23);
+                        writer.writeLine();
+                    }
+                }
+                function writePropertyWithModifiers(prop) {
+                    if (isReadonlySymbol(prop)) {
+                        writeKeyword(writer, 128);
+                        writeSpace(writer);
+                    }
+                    buildSymbolDisplay(prop, writer);
+                    if (prop.flags & 536870912) {
+                        writePunctuation(writer, 53);
+                    }
+                }
+                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
+                    if (flags & 64) {
+                        return true;
+                    }
+                    else if (flags & 256) {
+                        var typeParameters = callSignature.target && (flags & 32) ?
+                            callSignature.target.typeParameters : callSignature.typeParameters;
+                        return typeParameters && typeParameters.length !== 0;
+                    }
+                    return false;
+                }
+                function writeLiteralType(type, flags) {
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
+                            writePunctuation(writer, 15);
+                            writePunctuation(writer, 16);
+                            return;
+                        }
+                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
+                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 17);
+                            }
+                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8, undefined, symbolStack);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 18);
+                            }
+                            return;
+                        }
+                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
+                            if (flags & 64) {
+                                writePunctuation(writer, 17);
+                            }
+                            writeKeyword(writer, 92);
+                            writeSpace(writer);
+                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8, undefined, symbolStack);
+                            if (flags & 64) {
+                                writePunctuation(writer, 18);
+                            }
+                            return;
+                        }
+                    }
+                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
+                    inObjectTypeLiteral = true;
+                    writePunctuation(writer, 15);
+                    writer.writeLine();
+                    writer.increaseIndent();
+                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
+                        var signature = _a[_i];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, undefined, symbolStack);
+                        writePunctuation(writer, 23);
+                        writer.writeLine();
+                    }
+                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
+                        var signature = _c[_b];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1, symbolStack);
+                        writePunctuation(writer, 23);
+                        writer.writeLine();
+                    }
+                    writeIndexSignature(resolved.stringIndexInfo, 132);
+                    writeIndexSignature(resolved.numberIndexInfo, 130);
+                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
+                        var p = _e[_d];
+                        var t = getTypeOfSymbol(p);
+                        if (p.flags & (16 | 8192) && !getPropertiesOfObjectType(t).length) {
+                            var signatures = getSignaturesOfType(t, 0);
+                            for (var _f = 0, signatures_1 = signatures; _f < signatures_1.length; _f++) {
+                                var signature = signatures_1[_f];
+                                writePropertyWithModifiers(p);
+                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, undefined, symbolStack);
+                                writePunctuation(writer, 23);
+                                writer.writeLine();
+                            }
+                        }
+                        else {
+                            writePropertyWithModifiers(p);
+                            writePunctuation(writer, 54);
+                            writeSpace(writer);
+                            writeType(t, 0);
+                            writePunctuation(writer, 23);
+                            writer.writeLine();
+                        }
+                    }
+                    writer.decreaseIndent();
+                    writePunctuation(writer, 16);
+                    inObjectTypeLiteral = saveInObjectTypeLiteral;
+                }
+            }
+            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
+                var targetSymbol = getTargetSymbol(symbol);
+                if (targetSymbol.flags & 32 || targetSymbol.flags & 64 || targetSymbol.flags & 524288) {
+                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
+                }
+            }
+            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
+                appendSymbolNameOnly(tp.symbol, writer);
+                var constraint = getConstraintOfTypeParameter(tp);
+                if (constraint) {
+                    writeSpace(writer);
+                    writeKeyword(writer, 83);
+                    writeSpace(writer);
+                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
+                }
+            }
+            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
+                var parameterNode = p.valueDeclaration;
+                if (ts.isRestParameter(parameterNode)) {
+                    writePunctuation(writer, 22);
+                }
+                if (ts.isBindingPattern(parameterNode.name)) {
+                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    appendSymbolNameOnly(p, writer);
+                }
+                if (isOptionalParameter(parameterNode)) {
+                    writePunctuation(writer, 53);
+                }
+                writePunctuation(writer, 54);
+                writeSpace(writer);
+                buildTypeDisplay(getTypeOfSymbol(p), writer, enclosingDeclaration, flags, symbolStack);
+            }
+            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
+                if (bindingPattern.kind === 167) {
+                    writePunctuation(writer, 15);
+                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 16);
+                }
+                else if (bindingPattern.kind === 168) {
+                    writePunctuation(writer, 19);
+                    var elements = bindingPattern.elements;
+                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    if (elements && elements.hasTrailingComma) {
+                        writePunctuation(writer, 24);
+                    }
+                    writePunctuation(writer, 20);
+                }
+            }
+            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
+                if (bindingElement.kind === 193) {
+                    return;
+                }
+                ts.Debug.assert(bindingElement.kind === 169);
+                if (bindingElement.propertyName) {
+                    writer.writeSymbol(ts.getTextOfNode(bindingElement.propertyName), bindingElement.symbol);
+                    writePunctuation(writer, 54);
+                    writeSpace(writer);
+                }
+                if (ts.isBindingPattern(bindingElement.name)) {
+                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    if (bindingElement.dotDotDotToken) {
+                        writePunctuation(writer, 22);
+                    }
+                    appendSymbolNameOnly(bindingElement.symbol, writer);
+                }
+            }
+            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 25);
+                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 27);
+                }
+            }
+            function buildDisplayForCommaSeparatedList(list, writer, action) {
+                for (var i = 0; i < list.length; i++) {
+                    if (i > 0) {
+                        writePunctuation(writer, 24);
+                        writeSpace(writer);
+                    }
+                    action(list[i]);
+                }
+            }
+            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration, flags, symbolStack) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 25);
+                    var flags_1 = 256;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (i > 0) {
+                            writePunctuation(writer, 24);
+                            writeSpace(writer);
+                            flags_1 = 0;
+                        }
+                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags_1);
+                    }
+                    writePunctuation(writer, 27);
+                }
+            }
+            function buildDisplayForParametersAndDelimiters(thisType, parameters, writer, enclosingDeclaration, flags, symbolStack) {
+                writePunctuation(writer, 17);
+                if (thisType) {
+                    writeKeyword(writer, 97);
+                    writePunctuation(writer, 54);
+                    writeSpace(writer);
+                    buildTypeDisplay(thisType, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                for (var i = 0; i < parameters.length; i++) {
+                    if (i > 0 || thisType) {
+                        writePunctuation(writer, 24);
+                        writeSpace(writer);
+                    }
+                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
+                }
+                writePunctuation(writer, 18);
+            }
+            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    writer.writeParameter(predicate.parameterName);
+                }
+                else {
+                    writeKeyword(writer, 97);
+                }
+                writeSpace(writer);
+                writeKeyword(writer, 124);
+                writeSpace(writer);
+                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
+            }
+            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
+                if (flags & 8) {
+                    writeSpace(writer);
+                    writePunctuation(writer, 34);
+                }
+                else {
+                    writePunctuation(writer, 54);
+                }
+                writeSpace(writer);
+                if (signature.typePredicate) {
+                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    var returnType = getReturnTypeOfSignature(signature);
+                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
+                }
+            }
+            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
+                if (kind === 1) {
+                    writeKeyword(writer, 92);
+                    writeSpace(writer);
+                }
+                if (signature.target && (flags & 32)) {
+                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
+                }
+                else {
+                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                buildDisplayForParametersAndDelimiters(signature.thisType, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
+                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
+            }
+            return _displayBuilder || (_displayBuilder = {
+                buildSymbolDisplay: buildSymbolDisplay,
+                buildTypeDisplay: buildTypeDisplay,
+                buildTypeParameterDisplay: buildTypeParameterDisplay,
+                buildTypePredicateDisplay: buildTypePredicateDisplay,
+                buildParameterDisplay: buildParameterDisplay,
+                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
+                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
+                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
+                buildSignatureDisplay: buildSignatureDisplay,
+                buildReturnTypeDisplay: buildReturnTypeDisplay
+            });
+        }
+        function isDeclarationVisible(node) {
+            if (node) {
+                var links = getNodeLinks(node);
+                if (links.isVisible === undefined) {
+                    links.isVisible = !!determineIfDeclarationIsVisible();
+                }
+                return links.isVisible;
+            }
+            return false;
+            function determineIfDeclarationIsVisible() {
+                switch (node.kind) {
+                    case 169:
+                        return isDeclarationVisible(node.parent.parent);
+                    case 218:
+                        if (ts.isBindingPattern(node.name) &&
+                            !node.name.elements.length) {
+                            return false;
+                        }
+                    case 225:
+                    case 221:
+                    case 222:
+                    case 223:
+                    case 220:
+                    case 224:
+                    case 229:
+                        if (ts.isExternalModuleAugmentation(node)) {
+                            return true;
+                        }
+                        var parent_8 = getDeclarationContainer(node);
+                        if (!(ts.getCombinedNodeFlags(node) & 1) &&
+                            !(node.kind !== 229 && parent_8.kind !== 256 && ts.isInAmbientContext(parent_8))) {
+                            return isGlobalSourceFile(parent_8);
+                        }
+                        return isDeclarationVisible(parent_8);
+                    case 145:
+                    case 144:
+                    case 149:
+                    case 150:
+                    case 147:
+                    case 146:
+                        if (node.flags & (8 | 16)) {
+                            return false;
+                        }
+                    case 148:
+                    case 152:
+                    case 151:
+                    case 153:
+                    case 142:
+                    case 226:
+                    case 156:
+                    case 157:
+                    case 159:
+                    case 155:
+                    case 160:
+                    case 161:
+                    case 162:
+                    case 163:
+                    case 164:
+                        return isDeclarationVisible(node.parent);
+                    case 231:
+                    case 232:
+                    case 234:
+                        return false;
+                    case 141:
+                    case 256:
+                        return true;
+                    case 235:
+                        return false;
+                    default:
+                        return false;
+                }
+            }
+        }
+        function collectLinkedAliases(node) {
+            var exportSymbol;
+            if (node.parent && node.parent.kind === 235) {
+                exportSymbol = resolveName(node.parent, node.text, 107455 | 793056 | 1536 | 8388608, ts.Diagnostics.Cannot_find_name_0, node);
+            }
+            else if (node.parent.kind === 238) {
+                var exportSpecifier = node.parent;
+                exportSymbol = exportSpecifier.parent.parent.moduleSpecifier ?
+                    getExternalModuleMember(exportSpecifier.parent.parent, exportSpecifier) :
+                    resolveEntityName(exportSpecifier.propertyName || exportSpecifier.name, 107455 | 793056 | 1536 | 8388608);
+            }
+            var result = [];
+            if (exportSymbol) {
+                buildVisibleNodeList(exportSymbol.declarations);
+            }
+            return result;
+            function buildVisibleNodeList(declarations) {
+                ts.forEach(declarations, function (declaration) {
+                    getNodeLinks(declaration).isVisible = true;
+                    var resultNode = getAnyImportSyntax(declaration) || declaration;
+                    if (!ts.contains(result, resultNode)) {
+                        result.push(resultNode);
+                    }
+                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
+                        var internalModuleReference = declaration.moduleReference;
+                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
+                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 | 793056 | 1536, undefined, undefined);
+                        if (importSymbol) {
+                            buildVisibleNodeList(importSymbol.declarations);
+                        }
+                    }
+                });
+            }
+        }
+        function pushTypeResolution(target, propertyName) {
+            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
+            if (resolutionCycleStartIndex >= 0) {
+                var length_2 = resolutionTargets.length;
+                for (var i = resolutionCycleStartIndex; i < length_2; i++) {
+                    resolutionResults[i] = false;
+                }
+                return false;
+            }
+            resolutionTargets.push(target);
+            resolutionResults.push(true);
+            resolutionPropertyNames.push(propertyName);
+            return true;
+        }
+        function findResolutionCycleStartIndex(target, propertyName) {
+            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
+                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
+                    return -1;
+                }
+                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+        function hasType(target, propertyName) {
+            if (propertyName === 0) {
+                return getSymbolLinks(target).type;
+            }
+            if (propertyName === 2) {
+                return getSymbolLinks(target).declaredType;
+            }
+            if (propertyName === 1) {
+                ts.Debug.assert(!!(target.flags & 1024));
+                return target.resolvedBaseConstructorType;
+            }
+            if (propertyName === 3) {
+                return target.resolvedReturnType;
+            }
+            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
+        }
+        function popTypeResolution() {
+            resolutionTargets.pop();
+            resolutionPropertyNames.pop();
+            return resolutionResults.pop();
+        }
+        function getDeclarationContainer(node) {
+            node = ts.getRootDeclaration(node);
+            while (node) {
+                switch (node.kind) {
+                    case 218:
+                    case 219:
+                    case 234:
+                    case 233:
+                    case 232:
+                    case 231:
+                        node = node.parent;
+                        break;
+                    default:
+                        return node.parent;
+                }
+            }
+        }
+        function getTypeOfPrototypeProperty(prototype) {
+            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
+            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
+        }
+        function getTypeOfPropertyOfType(type, name) {
+            var prop = getPropertyOfType(type, name);
+            return prop ? getTypeOfSymbol(prop) : undefined;
+        }
+        function isTypeAny(type) {
+            return type && (type.flags & 1) !== 0;
+        }
+        function getTypeForBindingElementParent(node) {
+            var symbol = getSymbolOfNode(node);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, false);
+        }
+        function getTextOfPropertyName(name) {
+            switch (name.kind) {
+                case 69:
+                    return name.text;
+                case 9:
+                case 8:
+                    return name.text;
+                case 140:
+                    if (ts.isStringOrNumericLiteral(name.expression.kind)) {
+                        return name.expression.text;
+                    }
+            }
+            return undefined;
+        }
+        function isComputedNonLiteralName(name) {
+            return name.kind === 140 && !ts.isStringOrNumericLiteral(name.expression.kind);
+        }
+        function getTypeForBindingElement(declaration) {
+            var pattern = declaration.parent;
+            var parentType = getTypeForBindingElementParent(pattern.parent);
+            if (parentType === unknownType) {
+                return unknownType;
+            }
+            if (!parentType || isTypeAny(parentType)) {
+                if (declaration.initializer) {
+                    return checkExpressionCached(declaration.initializer);
+                }
+                return parentType;
+            }
+            var type;
+            if (pattern.kind === 167) {
+                var name_11 = declaration.propertyName || declaration.name;
+                if (isComputedNonLiteralName(name_11)) {
+                    return anyType;
+                }
+                if (declaration.initializer) {
+                    getContextualType(declaration.initializer);
+                }
+                var text = getTextOfPropertyName(name_11);
+                type = getTypeOfPropertyOfType(parentType, text) ||
+                    isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1) ||
+                    getIndexTypeOfType(parentType, 0);
+                if (!type) {
+                    error(name_11, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_11));
+                    return unknownType;
+                }
+            }
+            else {
+                var elementType = checkIteratedTypeOrElementType(parentType, pattern, false);
+                if (!declaration.dotDotDotToken) {
+                    var propName = "" + ts.indexOf(pattern.elements, declaration);
+                    type = isTupleLikeType(parentType)
+                        ? getTypeOfPropertyOfType(parentType, propName)
+                        : elementType;
+                    if (!type) {
+                        if (isTupleType(parentType)) {
+                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), parentType.elementTypes.length, pattern.elements.length);
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
+                        }
+                        return unknownType;
+                    }
+                }
+                else {
+                    type = createArrayType(elementType);
+                }
+            }
+            if (strictNullChecks && declaration.initializer && !(getCombinedTypeFlags(checkExpressionCached(declaration.initializer)) & 32)) {
+                type = getTypeWithFacts(type, 131072);
+            }
+            return type;
+        }
+        function getTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
+            var jsDocType = getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration);
+            if (jsDocType) {
+                return getTypeFromTypeNode(jsDocType);
+            }
+        }
+        function getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
+            var typeTag = ts.getJSDocTypeTag(declaration);
+            if (typeTag && typeTag.typeExpression) {
+                return typeTag.typeExpression.type;
+            }
+            if (declaration.kind === 218 &&
+                declaration.parent.kind === 219 &&
+                declaration.parent.parent.kind === 200) {
+                var annotation = ts.getJSDocTypeTag(declaration.parent.parent);
+                if (annotation && annotation.typeExpression) {
+                    return annotation.typeExpression.type;
+                }
+            }
+            else if (declaration.kind === 142) {
+                var paramTag = ts.getCorrespondingJSDocParameterTag(declaration);
+                if (paramTag && paramTag.typeExpression) {
+                    return paramTag.typeExpression.type;
+                }
+            }
+            return undefined;
+        }
+        function addOptionality(type, optional) {
+            return strictNullChecks && optional ? addTypeKind(type, 32) : type;
+        }
+        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
+            if (declaration.flags & 134217728) {
+                var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            if (declaration.parent.parent.kind === 207) {
+                return stringType;
+            }
+            if (declaration.parent.parent.kind === 208) {
+                return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType;
+            }
+            if (ts.isBindingPattern(declaration.parent)) {
+                return getTypeForBindingElement(declaration);
+            }
+            if (declaration.type) {
+                return addOptionality(getTypeFromTypeNode(declaration.type), declaration.questionToken && includeOptionality);
+            }
+            if (declaration.kind === 142) {
+                var func = declaration.parent;
+                if (func.kind === 150 && !ts.hasDynamicName(func)) {
+                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149);
+                    if (getter) {
+                        var signature = getSignatureFromDeclaration(getter);
+                        var thisParameter = getAccessorThisParameter(func);
+                        if (thisParameter && declaration === thisParameter) {
+                            return signature.thisType;
+                        }
+                        return getReturnTypeOfSignature(signature);
+                    }
+                }
+                var type = declaration.symbol.name === "this"
+                    ? getContextuallyTypedThisType(func)
+                    : getContextuallyTypedParameterType(declaration);
+                if (type) {
+                    return addOptionality(type, declaration.questionToken && includeOptionality);
+                }
+            }
+            if (declaration.initializer) {
+                return addOptionality(checkExpressionCached(declaration.initializer), declaration.questionToken && includeOptionality);
+            }
+            if (declaration.kind === 254) {
+                return checkIdentifier(declaration.name);
+            }
+            if (ts.isBindingPattern(declaration.name)) {
+                return getTypeFromBindingPattern(declaration.name, false);
+            }
+            return undefined;
+        }
+        function getTypeFromBindingElement(element, includePatternInType) {
+            if (element.initializer) {
+                var type = checkExpressionCached(element.initializer);
+                reportErrorsFromWidening(element, type);
+                return getWidenedType(type);
+            }
+            if (ts.isBindingPattern(element.name)) {
+                return getTypeFromBindingPattern(element.name, includePatternInType);
+            }
+            if (compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
+                reportImplicitAnyError(element, anyType);
+            }
+            return anyType;
+        }
+        function getTypeFromObjectBindingPattern(pattern, includePatternInType) {
+            var members = {};
+            var hasComputedProperties = false;
+            ts.forEach(pattern.elements, function (e) {
+                var name = e.propertyName || e.name;
+                if (isComputedNonLiteralName(name)) {
+                    hasComputedProperties = true;
+                    return;
+                }
+                var text = getTextOfPropertyName(name);
+                var flags = 4 | 67108864 | (e.initializer ? 536870912 : 0);
+                var symbol = createSymbol(flags, text);
+                symbol.type = getTypeFromBindingElement(e, includePatternInType);
+                symbol.bindingElement = e;
+                members[symbol.name] = symbol;
+            });
+            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined);
+            if (includePatternInType) {
+                result.pattern = pattern;
+            }
+            if (hasComputedProperties) {
+                result.flags |= 67108864;
+            }
+            return result;
+        }
+        function getTypeFromArrayBindingPattern(pattern, includePatternInType) {
+            var elements = pattern.elements;
+            if (elements.length === 0 || elements[elements.length - 1].dotDotDotToken) {
+                return languageVersion >= 2 ? createIterableType(anyType) : anyArrayType;
+            }
+            var elementTypes = ts.map(elements, function (e) { return e.kind === 193 ? anyType : getTypeFromBindingElement(e, includePatternInType); });
+            if (includePatternInType) {
+                var result = createNewTupleType(elementTypes);
+                result.pattern = pattern;
+                return result;
+            }
+            return createTupleType(elementTypes);
+        }
+        function getTypeFromBindingPattern(pattern, includePatternInType) {
+            return pattern.kind === 167
+                ? getTypeFromObjectBindingPattern(pattern, includePatternInType)
+                : getTypeFromArrayBindingPattern(pattern, includePatternInType);
+        }
+        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
+            var type = getTypeForVariableLikeDeclaration(declaration, true);
+            if (type) {
+                if (reportErrors) {
+                    reportErrorsFromWidening(declaration, type);
+                }
+                if (declaration.kind === 253) {
+                    return type;
+                }
+                return getWidenedType(type);
+            }
+            type = declaration.dotDotDotToken ? anyArrayType : anyType;
+            if (reportErrors && compilerOptions.noImplicitAny) {
+                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
+                    reportImplicitAnyError(declaration, type);
+                }
+            }
+            return type;
+        }
+        function declarationBelongsToPrivateAmbientMember(declaration) {
+            var root = ts.getRootDeclaration(declaration);
+            var memberDeclaration = root.kind === 142 ? root.parent : root;
+            return isPrivateWithinAmbient(memberDeclaration);
+        }
+        function getTypeOfVariableOrParameterOrProperty(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                if (symbol.flags & 134217728) {
+                    return links.type = getTypeOfPrototypeProperty(symbol);
+                }
+                var declaration = symbol.valueDeclaration;
+                if (declaration.parent.kind === 252) {
+                    return links.type = anyType;
+                }
+                if (declaration.kind === 235) {
+                    return links.type = checkExpression(declaration.expression);
+                }
+                if (declaration.kind === 187) {
+                    return links.type = getUnionType(ts.map(symbol.declarations, function (decl) { return checkExpressionCached(decl.right); }));
+                }
+                if (declaration.kind === 172) {
+                    if (declaration.parent.kind === 187) {
+                        return links.type = checkExpressionCached(declaration.parent.right);
+                    }
+                }
+                if (!pushTypeResolution(symbol, 0)) {
+                    return unknownType;
+                }
+                var type = getWidenedTypeForVariableLikeDeclaration(declaration, true);
+                if (!popTypeResolution()) {
+                    if (symbol.valueDeclaration.type) {
+                        type = unknownType;
+                        error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
+                    }
+                    else {
+                        type = anyType;
+                        if (compilerOptions.noImplicitAny) {
+                            error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
+                        }
+                    }
+                }
+                links.type = type;
+            }
+            return links.type;
+        }
+        function getAnnotatedAccessorType(accessor) {
+            if (accessor) {
+                if (accessor.kind === 149) {
+                    return accessor.type && getTypeFromTypeNode(accessor.type);
+                }
+                else {
+                    var setterTypeAnnotation = ts.getSetAccessorTypeAnnotationNode(accessor);
+                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
+                }
+            }
+            return undefined;
+        }
+        function getAnnotatedAccessorThisType(accessor) {
+            if (accessor) {
+                var parameter = getAccessorThisParameter(accessor);
+                if (parameter && parameter.type) {
+                    return getTypeFromTypeNode(accessor.parameters[0].type);
+                }
+            }
+            return undefined;
+        }
+        function getTypeOfAccessors(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var getter = ts.getDeclarationOfKind(symbol, 149);
+                var setter = ts.getDeclarationOfKind(symbol, 150);
+                if (getter && getter.flags & 134217728) {
+                    var jsDocType = getTypeForVariableLikeDeclarationFromJSDocComment(getter);
+                    if (jsDocType) {
+                        return links.type = jsDocType;
+                    }
+                }
+                if (!pushTypeResolution(symbol, 0)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                var getterReturnType = getAnnotatedAccessorType(getter);
+                if (getterReturnType) {
+                    type = getterReturnType;
+                }
+                else {
+                    var setterParameterType = getAnnotatedAccessorType(setter);
+                    if (setterParameterType) {
+                        type = setterParameterType;
+                    }
+                    else {
+                        if (getter && getter.body) {
+                            type = getReturnTypeFromBody(getter);
+                        }
+                        else {
+                            if (compilerOptions.noImplicitAny) {
+                                error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation, symbolToString(symbol));
+                            }
+                            type = anyType;
+                        }
+                    }
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (compilerOptions.noImplicitAny) {
+                        var getter_1 = ts.getDeclarationOfKind(symbol, 149);
+                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
+                    }
+                }
+                links.type = type;
+            }
+            return links.type;
+        }
+        function getTypeOfFuncClassEnumModule(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var type = createObjectType(65536, symbol);
+                links.type = strictNullChecks && symbol.flags & 536870912 ?
+                    addTypeKind(type, 32) : type;
+            }
+            return links.type;
+        }
+        function getTypeOfEnumMember(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                links.type = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
+            }
+            return links.type;
+        }
+        function getTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var targetSymbol = resolveAlias(symbol);
+                links.type = targetSymbol.flags & 107455
+                    ? getTypeOfSymbol(targetSymbol)
+                    : unknownType;
+            }
+            return links.type;
+        }
+        function getTypeOfInstantiatedSymbol(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                links.type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
+            }
+            return links.type;
+        }
+        function getTypeOfSymbol(symbol) {
+            if (symbol.flags & 16777216) {
+                return getTypeOfInstantiatedSymbol(symbol);
+            }
+            if (symbol.flags & (3 | 4)) {
+                return getTypeOfVariableOrParameterOrProperty(symbol);
+            }
+            if (symbol.flags & (16 | 8192 | 32 | 384 | 512)) {
+                return getTypeOfFuncClassEnumModule(symbol);
+            }
+            if (symbol.flags & 8) {
+                return getTypeOfEnumMember(symbol);
+            }
+            if (symbol.flags & 98304) {
+                return getTypeOfAccessors(symbol);
+            }
+            if (symbol.flags & 8388608) {
+                return getTypeOfAlias(symbol);
+            }
+            return unknownType;
+        }
+        function getTargetType(type) {
+            return type.flags & 4096 ? type.target : type;
+        }
+        function hasBaseType(type, checkBase) {
+            return check(type);
+            function check(type) {
+                var target = getTargetType(type);
+                return target === checkBase || ts.forEach(getBaseTypes(target), check);
+            }
+        }
+        function appendTypeParameters(typeParameters, declarations) {
+            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
+                var declaration = declarations_2[_i];
+                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
+                if (!typeParameters) {
+                    typeParameters = [tp];
+                }
+                else if (!ts.contains(typeParameters, tp)) {
+                    typeParameters.push(tp);
+                }
+            }
+            return typeParameters;
+        }
+        function appendOuterTypeParameters(typeParameters, node) {
+            while (true) {
+                node = node.parent;
+                if (!node) {
+                    return typeParameters;
+                }
+                if (node.kind === 221 || node.kind === 192 ||
+                    node.kind === 220 || node.kind === 179 ||
+                    node.kind === 147 || node.kind === 180) {
+                    var declarations = node.typeParameters;
+                    if (declarations) {
+                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
+                    }
+                }
+            }
+        }
+        function getOuterTypeParametersOfClassOrInterface(symbol) {
+            var declaration = symbol.flags & 32 ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222);
+            return appendOuterTypeParameters(undefined, declaration);
+        }
+        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
+            var result;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var node = _a[_i];
+                if (node.kind === 222 || node.kind === 221 ||
+                    node.kind === 192 || node.kind === 223) {
+                    var declaration = node;
+                    if (declaration.typeParameters) {
+                        result = appendTypeParameters(result, declaration.typeParameters);
+                    }
+                }
+            }
+            return result;
+        }
+        function getTypeParametersOfClassOrInterface(symbol) {
+            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
+        }
+        function isConstructorType(type) {
+            return type.flags & 80896 && getSignaturesOfType(type, 1).length > 0;
+        }
+        function getBaseTypeNodeOfClass(type) {
+            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
+        }
+        function getConstructorsForTypeArguments(type, typeArgumentNodes) {
+            var typeArgCount = typeArgumentNodes ? typeArgumentNodes.length : 0;
+            return ts.filter(getSignaturesOfType(type, 1), function (sig) { return (sig.typeParameters ? sig.typeParameters.length : 0) === typeArgCount; });
+        }
+        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes) {
+            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes);
+            if (typeArgumentNodes) {
+                var typeArguments_1 = ts.map(typeArgumentNodes, getTypeFromTypeNode);
+                signatures = ts.map(signatures, function (sig) { return getSignatureInstantiation(sig, typeArguments_1); });
+            }
+            return signatures;
+        }
+        function getBaseConstructorTypeOfClass(type) {
+            if (!type.resolvedBaseConstructorType) {
+                var baseTypeNode = getBaseTypeNodeOfClass(type);
+                if (!baseTypeNode) {
+                    return type.resolvedBaseConstructorType = undefinedType;
+                }
+                if (!pushTypeResolution(type, 1)) {
+                    return unknownType;
+                }
+                var baseConstructorType = checkExpression(baseTypeNode.expression);
+                if (baseConstructorType.flags & 80896) {
+                    resolveStructuredTypeMembers(baseConstructorType);
+                }
+                if (!popTypeResolution()) {
+                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                if (baseConstructorType !== unknownType && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
+                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                type.resolvedBaseConstructorType = baseConstructorType;
+            }
+            return type.resolvedBaseConstructorType;
+        }
+        function getBaseTypes(type) {
+            var isClass = type.symbol.flags & 32;
+            var isInterface = type.symbol.flags & 64;
+            if (!type.resolvedBaseTypes) {
+                if (!isClass && !isInterface) {
+                    ts.Debug.fail("type must be class or interface");
+                }
+                if (isClass) {
+                    resolveBaseTypesOfClass(type);
+                }
+                if (isInterface) {
+                    resolveBaseTypesOfInterface(type);
+                }
+            }
+            return type.resolvedBaseTypes;
+        }
+        function resolveBaseTypesOfClass(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            var baseConstructorType = getBaseConstructorTypeOfClass(type);
+            if (!(baseConstructorType.flags & 80896)) {
+                return;
+            }
+            var baseTypeNode = getBaseTypeNodeOfClass(type);
+            var baseType;
+            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
+            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 &&
+                areAllOuterTypeParametersApplied(originalBaseType)) {
+                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol);
+            }
+            else {
+                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments);
+                if (!constructors.length) {
+                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
+                    return;
+                }
+                baseType = getReturnTypeOfSignature(constructors[0]);
+            }
+            if (baseType === unknownType) {
+                return;
+            }
+            if (!(getTargetType(baseType).flags & (1024 | 2048))) {
+                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
+                return;
+            }
+            if (type === baseType || hasBaseType(baseType, type)) {
+                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 1));
+                return;
+            }
+            if (type.resolvedBaseTypes === emptyArray) {
+                type.resolvedBaseTypes = [baseType];
+            }
+            else {
+                type.resolvedBaseTypes.push(baseType);
+            }
+        }
+        function areAllOuterTypeParametersApplied(type) {
+            var outerTypeParameters = type.outerTypeParameters;
+            if (outerTypeParameters) {
+                var last = outerTypeParameters.length - 1;
+                var typeArguments = type.typeArguments;
+                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
+            }
+            return true;
+        }
+        function resolveBaseTypesOfInterface(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 222 && ts.getInterfaceBaseTypeNodes(declaration)) {
+                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
+                        var node = _c[_b];
+                        var baseType = getTypeFromTypeNode(node);
+                        if (baseType !== unknownType) {
+                            if (getTargetType(baseType).flags & (1024 | 2048)) {
+                                if (type !== baseType && !hasBaseType(baseType, type)) {
+                                    if (type.resolvedBaseTypes === emptyArray) {
+                                        type.resolvedBaseTypes = [baseType];
+                                    }
+                                    else {
+                                        type.resolvedBaseTypes.push(baseType);
+                                    }
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 1));
+                                }
+                            }
+                            else {
+                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        function isIndependentInterface(symbol) {
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 222) {
+                    if (declaration.flags & 16384) {
+                        return false;
+                    }
+                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
+                    if (baseTypeNodes) {
+                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
+                            var node = baseTypeNodes_1[_b];
+                            if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                                var baseSymbol = resolveEntityName(node.expression, 793056, true);
+                                if (!baseSymbol || !(baseSymbol.flags & 64) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
+                                    return false;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            return true;
+        }
+        function getDeclaredTypeOfClassOrInterface(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var kind = symbol.flags & 32 ? 1024 : 2048;
+                var type = links.declaredType = createObjectType(kind, symbol);
+                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
+                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                if (outerTypeParameters || localTypeParameters || kind === 1024 || !isIndependentInterface(symbol)) {
+                    type.flags |= 4096;
+                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
+                    type.outerTypeParameters = outerTypeParameters;
+                    type.localTypeParameters = localTypeParameters;
+                    type.instantiations = {};
+                    type.instantiations[getTypeListId(type.typeParameters)] = type;
+                    type.target = type;
+                    type.typeArguments = type.typeParameters;
+                    type.thisType = createType(512 | 33554432);
+                    type.thisType.symbol = symbol;
+                    type.thisType.constraint = type;
+                }
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfTypeAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                if (!pushTypeResolution(symbol, 2)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                var declaration = ts.getDeclarationOfKind(symbol, 279);
+                if (declaration) {
+                    if (declaration.jsDocTypeLiteral) {
+                        type = getTypeFromTypeNode(declaration.jsDocTypeLiteral);
+                    }
+                    else {
+                        type = getTypeFromTypeNode(declaration.typeExpression.type);
+                    }
+                }
+                else {
+                    declaration = ts.getDeclarationOfKind(symbol, 223);
+                    type = getTypeFromTypeNode(declaration.type);
+                }
+                if (popTypeResolution()) {
+                    links.typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                    if (links.typeParameters) {
+                        links.instantiations = {};
+                        links.instantiations[getTypeListId(links.typeParameters)] = type;
+                    }
+                }
+                else {
+                    type = unknownType;
+                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
+                }
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfEnum(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var type = createType(128);
+                type.symbol = symbol;
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfTypeParameter(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var type = createType(512);
+                type.symbol = symbol;
+                if (!ts.getDeclarationOfKind(symbol, 141).constraint) {
+                    type.constraint = noConstraintType;
+                }
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfSymbol(symbol) {
+            ts.Debug.assert((symbol.flags & 16777216) === 0);
+            if (symbol.flags & (32 | 64)) {
+                return getDeclaredTypeOfClassOrInterface(symbol);
+            }
+            if (symbol.flags & 524288) {
+                return getDeclaredTypeOfTypeAlias(symbol);
+            }
+            if (symbol.flags & 384) {
+                return getDeclaredTypeOfEnum(symbol);
+            }
+            if (symbol.flags & 262144) {
+                return getDeclaredTypeOfTypeParameter(symbol);
+            }
+            if (symbol.flags & 8388608) {
+                return getDeclaredTypeOfAlias(symbol);
+            }
+            return unknownType;
+        }
+        function isIndependentTypeReference(node) {
+            if (node.typeArguments) {
+                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
+                    var typeNode = _a[_i];
+                    if (!isIndependentType(typeNode)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function isIndependentType(node) {
+            switch (node.kind) {
+                case 117:
+                case 132:
+                case 130:
+                case 120:
+                case 133:
+                case 103:
+                case 135:
+                case 93:
+                case 127:
+                case 166:
+                    return true;
+                case 160:
+                    return isIndependentType(node.elementType);
+                case 155:
+                    return isIndependentTypeReference(node);
+            }
+            return false;
+        }
+        function isIndependentVariableLikeDeclaration(node) {
+            return node.type && isIndependentType(node.type) || !node.type && !node.initializer;
+        }
+        function isIndependentFunctionLikeDeclaration(node) {
+            if (node.kind !== 148 && (!node.type || !isIndependentType(node.type))) {
+                return false;
+            }
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                if (!isIndependentVariableLikeDeclaration(parameter)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        function isIndependentMember(symbol) {
+            if (symbol.declarations && symbol.declarations.length === 1) {
+                var declaration = symbol.declarations[0];
+                if (declaration) {
+                    switch (declaration.kind) {
+                        case 145:
+                        case 144:
+                            return isIndependentVariableLikeDeclaration(declaration);
+                        case 147:
+                        case 146:
+                        case 148:
+                            return isIndependentFunctionLikeDeclaration(declaration);
+                    }
+                }
+            }
+            return false;
+        }
+        function createSymbolTable(symbols) {
+            var result = {};
+            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
+                var symbol = symbols_1[_i];
+                result[symbol.name] = symbol;
+            }
+            return result;
+        }
+        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
+            var result = {};
+            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
+                var symbol = symbols_2[_i];
+                result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper);
+            }
+            return result;
+        }
+        function addInheritedMembers(symbols, baseSymbols) {
+            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
+                var s = baseSymbols_1[_i];
+                if (!ts.hasProperty(symbols, s.name)) {
+                    symbols[s.name] = s;
+                }
+            }
+        }
+        function resolveDeclaredMembers(type) {
+            if (!type.declaredProperties) {
+                var symbol = type.symbol;
+                type.declaredProperties = getNamedMembers(symbol.members);
+                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members["__call"]);
+                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members["__new"]);
+                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
+                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
+            }
+            return type;
+        }
+        function getTypeWithThisArgument(type, thisArgument) {
+            if (type.flags & 4096) {
+                return createTypeReference(type.target, ts.concatenate(type.typeArguments, [thisArgument || type.target.thisType]));
+            }
+            return type;
+        }
+        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
+            var mapper = identityMapper;
+            var members = source.symbol.members;
+            var callSignatures = source.declaredCallSignatures;
+            var constructSignatures = source.declaredConstructSignatures;
+            var stringIndexInfo = source.declaredStringIndexInfo;
+            var numberIndexInfo = source.declaredNumberIndexInfo;
+            if (!ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
+                mapper = createTypeMapper(typeParameters, typeArguments);
+                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, typeParameters.length === 1);
+                callSignatures = instantiateList(source.declaredCallSignatures, mapper, instantiateSignature);
+                constructSignatures = instantiateList(source.declaredConstructSignatures, mapper, instantiateSignature);
+                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
+                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
+            }
+            var baseTypes = getBaseTypes(source);
+            if (baseTypes.length) {
+                if (members === source.symbol.members) {
+                    members = createSymbolTable(source.declaredProperties);
+                }
+                var thisArgument = ts.lastOrUndefined(typeArguments);
+                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
+                    var baseType = baseTypes_1[_i];
+                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
+                    addInheritedMembers(members, getPropertiesOfObjectType(instantiatedBaseType));
+                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0));
+                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1));
+                    stringIndexInfo = stringIndexInfo || getIndexInfoOfType(instantiatedBaseType, 0);
+                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1);
+                }
+            }
+            setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function resolveClassOrInterfaceMembers(type) {
+            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
+        }
+        function resolveTypeReferenceMembers(type) {
+            var source = resolveDeclaredMembers(type.target);
+            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
+            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
+                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
+            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
+        }
+        function createSignature(declaration, typeParameters, thisType, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasStringLiterals) {
+            var sig = new Signature(checker);
+            sig.declaration = declaration;
+            sig.typeParameters = typeParameters;
+            sig.parameters = parameters;
+            sig.thisType = thisType;
+            sig.resolvedReturnType = resolvedReturnType;
+            sig.typePredicate = typePredicate;
+            sig.minArgumentCount = minArgumentCount;
+            sig.hasRestParameter = hasRestParameter;
+            sig.hasStringLiterals = hasStringLiterals;
+            return sig;
+        }
+        function cloneSignature(sig) {
+            return createSignature(sig.declaration, sig.typeParameters, sig.thisType, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasStringLiterals);
+        }
+        function getDefaultConstructSignatures(classType) {
+            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+            var baseSignatures = getSignaturesOfType(baseConstructorType, 1);
+            if (baseSignatures.length === 0) {
+                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, undefined, 0, false, false)];
+            }
+            var baseTypeNode = getBaseTypeNodeOfClass(classType);
+            var typeArguments = ts.map(baseTypeNode.typeArguments, getTypeFromTypeNode);
+            var typeArgCount = typeArguments ? typeArguments.length : 0;
+            var result = [];
+            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
+                var baseSig = baseSignatures_1[_i];
+                var typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
+                if (typeParamCount === typeArgCount) {
+                    var sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
+                    sig.typeParameters = classType.localTypeParameters;
+                    sig.resolvedReturnType = classType;
+                    result.push(sig);
+                }
+            }
+            return result;
+        }
+        function createTupleTypeMemberSymbols(memberTypes) {
+            var members = {};
+            for (var i = 0; i < memberTypes.length; i++) {
+                var symbol = createSymbol(4 | 67108864, "" + i);
+                symbol.type = memberTypes[i];
+                members[i] = symbol;
+            }
+            return members;
+        }
+        function resolveTupleTypeMembers(type) {
+            var arrayElementType = getUnionType(type.elementTypes, true);
+            var arrayType = resolveStructuredTypeMembers(createTypeFromGenericGlobalType(globalArrayType, [arrayElementType, type]));
+            var members = createTupleTypeMemberSymbols(type.elementTypes);
+            addInheritedMembers(members, arrayType.properties);
+            setObjectTypeMembers(type, members, arrayType.callSignatures, arrayType.constructSignatures, arrayType.stringIndexInfo, arrayType.numberIndexInfo);
+        }
+        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
+            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
+                var s = signatureList_1[_i];
+                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
+                    return s;
+                }
+            }
+        }
+        function findMatchingSignatures(signatureLists, signature, listIndex) {
+            if (signature.typeParameters) {
+                if (listIndex > 0) {
+                    return undefined;
+                }
+                for (var i = 1; i < signatureLists.length; i++) {
+                    if (!findMatchingSignature(signatureLists[i], signature, false, false, false)) {
+                        return undefined;
+                    }
+                }
+                return [signature];
+            }
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, true, true, true);
+                if (!match) {
+                    return undefined;
+                }
+                if (!ts.contains(result, match)) {
+                    (result || (result = [])).push(match);
+                }
+            }
+            return result;
+        }
+        function getUnionSignatures(types, kind) {
+            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
+                    var signature = _a[_i];
+                    if (!result || !findMatchingSignature(result, signature, false, true, true)) {
+                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
+                        if (unionSignatures) {
+                            var s = signature;
+                            if (unionSignatures.length > 1) {
+                                s = cloneSignature(signature);
+                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisType; })) {
+                                    s.thisType = getUnionType(ts.map(unionSignatures, function (sig) { return sig.thisType || anyType; }));
+                                }
+                                s.resolvedReturnType = undefined;
+                                s.unionSignatures = unionSignatures;
+                            }
+                            (result || (result = [])).push(s);
+                        }
+                    }
+                }
+            }
+            return result || emptyArray;
+        }
+        function getUnionIndexInfo(types, kind) {
+            var indexTypes = [];
+            var isAnyReadonly = false;
+            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
+                var type = types_1[_i];
+                var indexInfo = getIndexInfoOfType(type, kind);
+                if (!indexInfo) {
+                    return undefined;
+                }
+                indexTypes.push(indexInfo.type);
+                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
+            }
+            return createIndexInfo(getUnionType(indexTypes), isAnyReadonly);
+        }
+        function resolveUnionTypeMembers(type) {
+            var callSignatures = getUnionSignatures(type.types, 0);
+            var constructSignatures = getUnionSignatures(type.types, 1);
+            var stringIndexInfo = getUnionIndexInfo(type.types, 0);
+            var numberIndexInfo = getUnionIndexInfo(type.types, 1);
+            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function intersectTypes(type1, type2) {
+            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
+        }
+        function intersectIndexInfos(info1, info2) {
+            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
+        }
+        function resolveIntersectionTypeMembers(type) {
+            var callSignatures = emptyArray;
+            var constructSignatures = emptyArray;
+            var stringIndexInfo = undefined;
+            var numberIndexInfo = undefined;
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0));
+                constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(t, 1));
+                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0));
+                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1));
+            }
+            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function resolveAnonymousTypeMembers(type) {
+            var symbol = type.symbol;
+            if (type.target) {
+                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, false);
+                var callSignatures = instantiateList(getSignaturesOfType(type.target, 0), type.mapper, instantiateSignature);
+                var constructSignatures = instantiateList(getSignaturesOfType(type.target, 1), type.mapper, instantiateSignature);
+                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0), type.mapper);
+                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1), type.mapper);
+                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else if (symbol.flags & 2048) {
+                var members = symbol.members;
+                var callSignatures = getSignaturesOfSymbol(members["__call"]);
+                var constructSignatures = getSignaturesOfSymbol(members["__new"]);
+                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
+                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
+                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else {
+                var members = emptySymbols;
+                var constructSignatures = emptyArray;
+                if (symbol.flags & 1952) {
+                    members = getExportsOfSymbol(symbol);
+                }
+                if (symbol.flags & 32) {
+                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
+                    constructSignatures = getSignaturesOfSymbol(symbol.members["__constructor"]);
+                    if (!constructSignatures.length) {
+                        constructSignatures = getDefaultConstructSignatures(classType);
+                    }
+                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+                    if (baseConstructorType.flags & 80896) {
+                        members = createSymbolTable(getNamedMembers(members));
+                        addInheritedMembers(members, getPropertiesOfObjectType(baseConstructorType));
+                    }
+                }
+                var numberIndexInfo = symbol.flags & 384 ? enumNumberIndexInfo : undefined;
+                setObjectTypeMembers(type, members, emptyArray, constructSignatures, undefined, numberIndexInfo);
+                if (symbol.flags & (16 | 8192)) {
+                    type.callSignatures = getSignaturesOfSymbol(symbol);
+                }
+            }
+        }
+        function resolveStructuredTypeMembers(type) {
+            if (!type.members) {
+                if (type.flags & 4096) {
+                    resolveTypeReferenceMembers(type);
+                }
+                else if (type.flags & (1024 | 2048)) {
+                    resolveClassOrInterfaceMembers(type);
+                }
+                else if (type.flags & 65536) {
+                    resolveAnonymousTypeMembers(type);
+                }
+                else if (type.flags & 8192) {
+                    resolveTupleTypeMembers(type);
+                }
+                else if (type.flags & 16384) {
+                    resolveUnionTypeMembers(type);
+                }
+                else if (type.flags & 32768) {
+                    resolveIntersectionTypeMembers(type);
+                }
+            }
+            return type;
+        }
+        function getPropertiesOfObjectType(type) {
+            if (type.flags & 80896) {
+                return resolveStructuredTypeMembers(type).properties;
+            }
+            return emptyArray;
+        }
+        function getPropertyOfObjectType(type, name) {
+            if (type.flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (ts.hasProperty(resolved.members, name)) {
+                    var symbol = resolved.members[name];
+                    if (symbolIsValue(symbol)) {
+                        return symbol;
+                    }
+                }
+            }
+        }
+        function getPropertiesOfUnionOrIntersectionType(type) {
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var current = _a[_i];
+                for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
+                    var prop = _c[_b];
+                    getPropertyOfUnionOrIntersectionType(type, prop.name);
+                }
+                if (type.flags & 16384) {
+                    break;
+                }
+            }
+            return type.resolvedProperties ? symbolsToArray(type.resolvedProperties) : emptyArray;
+        }
+        function getPropertiesOfType(type) {
+            type = getApparentType(type);
+            return type.flags & 49152 ? getPropertiesOfUnionOrIntersectionType(type) : getPropertiesOfObjectType(type);
+        }
+        function getApparentTypeOfTypeParameter(type) {
+            if (!type.resolvedApparentType) {
+                var constraintType = getConstraintOfTypeParameter(type);
+                while (constraintType && constraintType.flags & 512) {
+                    constraintType = getConstraintOfTypeParameter(constraintType);
+                }
+                type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type);
+            }
+            return type.resolvedApparentType;
+        }
+        function getApparentType(type) {
+            if (type.flags & 512) {
+                type = getApparentTypeOfTypeParameter(type);
+            }
+            if (type.flags & 258) {
+                type = globalStringType;
+            }
+            else if (type.flags & 132) {
+                type = globalNumberType;
+            }
+            else if (type.flags & 8) {
+                type = globalBooleanType;
+            }
+            else if (type.flags & 16777216) {
+                type = getGlobalESSymbolType();
+            }
+            return type;
+        }
+        function createUnionOrIntersectionProperty(containingType, name) {
+            var types = containingType.types;
+            var props;
+            var commonFlags = (containingType.flags & 32768) ? 536870912 : 0;
+            for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
+                var current = types_2[_i];
+                var type = getApparentType(current);
+                if (type !== unknownType) {
+                    var prop = getPropertyOfType(type, name);
+                    if (prop && !(getDeclarationFlagsFromSymbol(prop) & (8 | 16))) {
+                        commonFlags &= prop.flags;
+                        if (!props) {
+                            props = [prop];
+                        }
+                        else if (!ts.contains(props, prop)) {
+                            props.push(prop);
+                        }
+                    }
+                    else if (containingType.flags & 16384) {
+                        return undefined;
+                    }
+                }
+            }
+            if (!props) {
+                return undefined;
+            }
+            if (props.length === 1) {
+                return props[0];
+            }
+            var propTypes = [];
+            var declarations = [];
+            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
+                var prop = props_1[_a];
+                if (prop.declarations) {
+                    ts.addRange(declarations, prop.declarations);
+                }
+                propTypes.push(getTypeOfSymbol(prop));
+            }
+            var result = createSymbol(4 |
+                67108864 |
+                268435456 |
+                commonFlags, name);
+            result.containingType = containingType;
+            result.declarations = declarations;
+            result.type = containingType.flags & 16384 ? getUnionType(propTypes) : getIntersectionType(propTypes);
+            return result;
+        }
+        function getPropertyOfUnionOrIntersectionType(type, name) {
+            var properties = type.resolvedProperties || (type.resolvedProperties = {});
+            if (ts.hasProperty(properties, name)) {
+                return properties[name];
+            }
+            var property = createUnionOrIntersectionProperty(type, name);
+            if (property) {
+                properties[name] = property;
+            }
+            return property;
+        }
+        function getPropertyOfType(type, name) {
+            type = getApparentType(type);
+            if (type.flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (ts.hasProperty(resolved.members, name)) {
+                    var symbol = resolved.members[name];
+                    if (symbolIsValue(symbol)) {
+                        return symbol;
+                    }
+                }
+                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
+                    var symbol = getPropertyOfObjectType(globalFunctionType, name);
+                    if (symbol) {
+                        return symbol;
+                    }
+                }
+                return getPropertyOfObjectType(globalObjectType, name);
+            }
+            if (type.flags & 49152) {
+                return getPropertyOfUnionOrIntersectionType(type, name);
+            }
+            return undefined;
+        }
+        function getSignaturesOfStructuredType(type, kind) {
+            if (type.flags & 130048) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 ? resolved.callSignatures : resolved.constructSignatures;
+            }
+            return emptyArray;
+        }
+        function getSignaturesOfType(type, kind) {
+            return getSignaturesOfStructuredType(getApparentType(type), kind);
+        }
+        function getIndexInfoOfStructuredType(type, kind) {
+            if (type.flags & 130048) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 ? resolved.stringIndexInfo : resolved.numberIndexInfo;
+            }
+        }
+        function getIndexTypeOfStructuredType(type, kind) {
+            var info = getIndexInfoOfStructuredType(type, kind);
+            return info && info.type;
+        }
+        function getIndexInfoOfType(type, kind) {
+            return getIndexInfoOfStructuredType(getApparentType(type), kind);
+        }
+        function getIndexTypeOfType(type, kind) {
+            return getIndexTypeOfStructuredType(getApparentType(type), kind);
+        }
+        function getImplicitIndexTypeOfType(type, kind) {
+            if (isObjectLiteralType(type)) {
+                var propTypes = [];
+                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 || isNumericLiteralName(prop.name)) {
+                        propTypes.push(getTypeOfSymbol(prop));
+                    }
+                }
+                if (propTypes.length) {
+                    return getUnionType(propTypes);
+                }
+            }
+            return undefined;
+        }
+        function getTypeParametersFromJSDocTemplate(declaration) {
+            if (declaration.flags & 134217728) {
+                var templateTag = ts.getJSDocTemplateTag(declaration);
+                if (templateTag) {
+                    return getTypeParametersFromDeclaration(templateTag.typeParameters);
+                }
+            }
+            return undefined;
+        }
+        function getTypeParametersFromDeclaration(typeParameterDeclarations) {
+            var result = [];
+            ts.forEach(typeParameterDeclarations, function (node) {
+                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
+                if (!ts.contains(result, tp)) {
+                    result.push(tp);
+                }
+            });
+            return result;
+        }
+        function symbolsToArray(symbols) {
+            var result = [];
+            for (var id in symbols) {
+                if (!isReservedMemberName(id)) {
+                    result.push(symbols[id]);
+                }
+            }
+            return result;
+        }
+        function isOptionalParameter(node) {
+            if (node.flags & 134217728) {
+                if (node.type && node.type.kind === 268) {
+                    return true;
+                }
+                var paramTag = ts.getCorrespondingJSDocParameterTag(node);
+                if (paramTag) {
+                    if (paramTag.isBracketed) {
+                        return true;
+                    }
+                    if (paramTag.typeExpression) {
+                        return paramTag.typeExpression.type.kind === 268;
+                    }
+                }
+            }
+            if (ts.hasQuestionToken(node)) {
+                return true;
+            }
+            if (node.initializer) {
+                var signatureDeclaration = node.parent;
+                var signature = getSignatureFromDeclaration(signatureDeclaration);
+                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
+                ts.Debug.assert(parameterIndex >= 0);
+                return parameterIndex >= signature.minArgumentCount;
+            }
+            return false;
+        }
+        function createTypePredicateFromTypePredicateNode(node) {
+            if (node.parameterName.kind === 69) {
+                var parameterName = node.parameterName;
+                return {
+                    kind: 1,
+                    parameterName: parameterName ? parameterName.text : undefined,
+                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
+                    type: getTypeFromTypeNode(node.type)
+                };
+            }
+            else {
+                return {
+                    kind: 0,
+                    type: getTypeFromTypeNode(node.type)
+                };
+            }
+        }
+        function getSignatureFromDeclaration(declaration) {
+            var links = getNodeLinks(declaration);
+            if (!links.resolvedSignature) {
+                var parameters = [];
+                var hasStringLiterals = false;
+                var minArgumentCount = -1;
+                var thisType = undefined;
+                var hasThisParameter = void 0;
+                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
+                for (var i = isJSConstructSignature ? 1 : 0, n = declaration.parameters.length; i < n; i++) {
+                    var param = declaration.parameters[i];
+                    var paramSymbol = param.symbol;
+                    if (paramSymbol && !!(paramSymbol.flags & 4) && !ts.isBindingPattern(param.name)) {
+                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455, undefined, undefined);
+                        paramSymbol = resolvedSymbol;
+                    }
+                    if (i === 0 && paramSymbol.name === "this") {
+                        hasThisParameter = true;
+                        thisType = param.type ? getTypeFromTypeNode(param.type) : unknownType;
+                    }
+                    else {
+                        parameters.push(paramSymbol);
+                    }
+                    if (param.type && param.type.kind === 166) {
+                        hasStringLiterals = true;
+                    }
+                    if (param.initializer || param.questionToken || param.dotDotDotToken) {
+                        if (minArgumentCount < 0) {
+                            minArgumentCount = i - (hasThisParameter ? 1 : 0);
+                        }
+                    }
+                    else {
+                        minArgumentCount = -1;
+                    }
+                }
+                if ((declaration.kind === 149 || declaration.kind === 150) &&
+                    !ts.hasDynamicName(declaration) &&
+                    (!hasThisParameter || thisType === unknownType)) {
+                    var otherKind = declaration.kind === 149 ? 150 : 149;
+                    var setter = ts.getDeclarationOfKind(declaration.symbol, otherKind);
+                    thisType = getAnnotatedAccessorThisType(setter);
+                }
+                if (minArgumentCount < 0) {
+                    minArgumentCount = declaration.parameters.length - (hasThisParameter ? 1 : 0);
+                }
+                if (isJSConstructSignature) {
+                    minArgumentCount--;
+                }
+                var classType = declaration.kind === 148 ?
+                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
+                    : undefined;
+                var typeParameters = classType ? classType.localTypeParameters :
+                    declaration.typeParameters ? getTypeParametersFromDeclaration(declaration.typeParameters) :
+                        getTypeParametersFromJSDocTemplate(declaration);
+                var returnType = getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType);
+                var typePredicate = declaration.type && declaration.type.kind === 154 ?
+                    createTypePredicateFromTypePredicateNode(declaration.type) :
+                    undefined;
+                links.resolvedSignature = createSignature(declaration, typeParameters, thisType, parameters, returnType, typePredicate, minArgumentCount, ts.hasRestParameter(declaration), hasStringLiterals);
+            }
+            return links.resolvedSignature;
+        }
+        function getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType) {
+            if (isJSConstructSignature) {
+                return getTypeFromTypeNode(declaration.parameters[0].type);
+            }
+            else if (classType) {
+                return classType;
+            }
+            else if (declaration.type) {
+                return getTypeFromTypeNode(declaration.type);
+            }
+            if (declaration.flags & 134217728) {
+                var type = getReturnTypeFromJSDocComment(declaration);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            if (declaration.kind === 149 && !ts.hasDynamicName(declaration)) {
+                var setter = ts.getDeclarationOfKind(declaration.symbol, 150);
+                return getAnnotatedAccessorType(setter);
+            }
+            if (ts.nodeIsMissing(declaration.body)) {
+                return anyType;
+            }
+        }
+        function getSignaturesOfSymbol(symbol) {
+            if (!symbol)
+                return emptyArray;
+            var result = [];
+            for (var i = 0, len = symbol.declarations.length; i < len; i++) {
+                var node = symbol.declarations[i];
+                switch (node.kind) {
+                    case 156:
+                    case 157:
+                    case 220:
+                    case 147:
+                    case 146:
+                    case 148:
+                    case 151:
+                    case 152:
+                    case 153:
+                    case 149:
+                    case 150:
+                    case 179:
+                    case 180:
+                    case 269:
+                        if (i > 0 && node.body) {
+                            var previous = symbol.declarations[i - 1];
+                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
+                                break;
+                            }
+                        }
+                        result.push(getSignatureFromDeclaration(node));
+                }
+            }
+            return result;
+        }
+        function resolveExternalModuleTypeByLiteral(name) {
+            var moduleSym = resolveExternalModuleName(name, name);
+            if (moduleSym) {
+                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
+                if (resolvedModuleSymbol) {
+                    return getTypeOfSymbol(resolvedModuleSymbol);
+                }
+            }
+            return anyType;
+        }
+        function getReturnTypeOfSignature(signature) {
+            if (!signature.resolvedReturnType) {
+                if (!pushTypeResolution(signature, 3)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                if (signature.target) {
+                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
+                }
+                else if (signature.unionSignatures) {
+                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature));
+                }
+                else {
+                    type = getReturnTypeFromBody(signature.declaration);
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (compilerOptions.noImplicitAny) {
+                        var declaration = signature.declaration;
+                        if (declaration.name) {
+                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
+                        }
+                    }
+                }
+                signature.resolvedReturnType = type;
+            }
+            return signature.resolvedReturnType;
+        }
+        function getRestTypeOfSignature(signature) {
+            if (signature.hasRestParameter) {
+                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
+                if (type.flags & 4096 && type.target === globalArrayType) {
+                    return type.typeArguments[0];
+                }
+            }
+            return anyType;
+        }
+        function getSignatureInstantiation(signature, typeArguments) {
+            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), true);
+        }
+        function getErasedSignature(signature) {
+            if (!signature.typeParameters)
+                return signature;
+            if (!signature.erasedSignatureCache) {
+                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), true);
+            }
+            return signature.erasedSignatureCache;
+        }
+        function getOrCreateTypeFromSignature(signature) {
+            if (!signature.isolatedSignatureType) {
+                var isConstructor = signature.declaration.kind === 148 || signature.declaration.kind === 152;
+                var type = createObjectType(65536 | 262144);
+                type.members = emptySymbols;
+                type.properties = emptyArray;
+                type.callSignatures = !isConstructor ? [signature] : emptyArray;
+                type.constructSignatures = isConstructor ? [signature] : emptyArray;
+                signature.isolatedSignatureType = type;
+            }
+            return signature.isolatedSignatureType;
+        }
+        function getIndexSymbol(symbol) {
+            return symbol.members["__index"];
+        }
+        function getIndexDeclarationOfSymbol(symbol, kind) {
+            var syntaxKind = kind === 1 ? 130 : 132;
+            var indexSymbol = getIndexSymbol(symbol);
+            if (indexSymbol) {
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var node = decl;
+                    if (node.parameters.length === 1) {
+                        var parameter = node.parameters[0];
+                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
+                            return node;
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function createIndexInfo(type, isReadonly, declaration) {
+            return { type: type, isReadonly: isReadonly, declaration: declaration };
+        }
+        function getIndexInfoOfSymbol(symbol, kind) {
+            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
+            if (declaration) {
+                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (declaration.flags & 64) !== 0, declaration);
+            }
+            return undefined;
+        }
+        function getConstraintDeclaration(type) {
+            return ts.getDeclarationOfKind(type.symbol, 141).constraint;
+        }
+        function hasConstraintReferenceTo(type, target) {
+            var checked;
+            while (type && !(type.flags & 33554432) && type.flags & 512 && !ts.contains(checked, type)) {
+                if (type === target) {
+                    return true;
+                }
+                (checked || (checked = [])).push(type);
+                var constraintDeclaration = getConstraintDeclaration(type);
+                type = constraintDeclaration && getTypeFromTypeNode(constraintDeclaration);
+            }
+            return false;
+        }
+        function getConstraintOfTypeParameter(typeParameter) {
+            if (!typeParameter.constraint) {
+                if (typeParameter.target) {
+                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
+                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
+                }
+                else {
+                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
+                    var constraint = getTypeFromTypeNode(constraintDeclaration);
+                    if (hasConstraintReferenceTo(constraint, typeParameter)) {
+                        error(constraintDeclaration, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
+                        constraint = unknownType;
+                    }
+                    typeParameter.constraint = constraint;
+                }
+            }
+            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
+        }
+        function getParentSymbolOfTypeParameter(typeParameter) {
+            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 141).parent);
+        }
+        function getTypeListId(types) {
+            if (types) {
+                switch (types.length) {
+                    case 1:
+                        return "" + types[0].id;
+                    case 2:
+                        return types[0].id + "," + types[1].id;
+                    default:
+                        var result = "";
+                        for (var i = 0; i < types.length; i++) {
+                            if (i > 0) {
+                                result += ",";
+                            }
+                            result += types[i].id;
+                        }
+                        return result;
+                }
+            }
+            return "";
+        }
+        function getPropagatingFlagsOfTypes(types, excludeKinds) {
+            var result = 0;
+            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
+                var type = types_3[_i];
+                if (!(type.flags & excludeKinds)) {
+                    result |= type.flags;
+                }
+            }
+            return result & 14680064;
+        }
+        function createTypeReference(target, typeArguments) {
+            var id = getTypeListId(typeArguments);
+            var type = target.instantiations[id];
+            if (!type) {
+                var propagatedFlags = typeArguments ? getPropagatingFlagsOfTypes(typeArguments, 0) : 0;
+                var flags = 4096 | propagatedFlags;
+                type = target.instantiations[id] = createObjectType(flags, target.symbol);
+                type.target = target;
+                type.typeArguments = typeArguments;
+            }
+            return type;
+        }
+        function getTypeFromClassOrInterfaceReference(node, symbol) {
+            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
+            var typeParameters = type.localTypeParameters;
+            if (typeParameters) {
+                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
+                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, typeToString(type, undefined, 1), typeParameters.length);
+                    return unknownType;
+                }
+                return createTypeReference(type, ts.concatenate(type.outerTypeParameters, ts.map(node.typeArguments, getTypeFromTypeNode)));
+            }
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
+                return unknownType;
+            }
+            return type;
+        }
+        function getTypeFromTypeAliasReference(node, symbol) {
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var links = getSymbolLinks(symbol);
+            var typeParameters = links.typeParameters;
+            if (typeParameters) {
+                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
+                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, symbolToString(symbol), typeParameters.length);
+                    return unknownType;
+                }
+                var typeArguments = ts.map(node.typeArguments, getTypeFromTypeNode);
+                var id = getTypeListId(typeArguments);
+                return links.instantiations[id] || (links.instantiations[id] = instantiateType(type, createTypeMapper(typeParameters, typeArguments)));
+            }
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return type;
+        }
+        function getTypeFromNonGenericTypeReference(node, symbol) {
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return getDeclaredTypeOfSymbol(symbol);
+        }
+        function getTypeReferenceName(node) {
+            switch (node.kind) {
+                case 155:
+                    return node.typeName;
+                case 267:
+                    return node.name;
+                case 194:
+                    if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                        return node.expression;
+                    }
+            }
+            return undefined;
+        }
+        function resolveTypeReferenceName(node, typeReferenceName) {
+            if (!typeReferenceName) {
+                return unknownSymbol;
+            }
+            return resolveEntityName(typeReferenceName, 793056) || unknownSymbol;
+        }
+        function getTypeReferenceType(node, symbol) {
+            if (symbol === unknownSymbol) {
+                return unknownType;
+            }
+            if (symbol.flags & (32 | 64)) {
+                return getTypeFromClassOrInterfaceReference(node, symbol);
+            }
+            if (symbol.flags & 524288) {
+                return getTypeFromTypeAliasReference(node, symbol);
+            }
+            if (symbol.flags & 107455 && node.kind === 267) {
+                return getTypeOfSymbol(symbol);
+            }
+            return getTypeFromNonGenericTypeReference(node, symbol);
+        }
+        function getTypeFromTypeReference(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var symbol = void 0;
+                var type = void 0;
+                if (node.kind === 267) {
+                    var typeReferenceName = getTypeReferenceName(node);
+                    symbol = resolveTypeReferenceName(node, typeReferenceName);
+                    type = getTypeReferenceType(node, symbol);
+                    links.resolvedSymbol = symbol;
+                    links.resolvedType = type;
+                }
+                else {
+                    var typeNameOrExpression = node.kind === 155 ? node.typeName :
+                        ts.isSupportedExpressionWithTypeArguments(node) ? node.expression :
+                            undefined;
+                    symbol = typeNameOrExpression && resolveEntityName(typeNameOrExpression, 793056) || unknownSymbol;
+                    type = symbol === unknownSymbol ? unknownType :
+                        symbol.flags & (32 | 64) ? getTypeFromClassOrInterfaceReference(node, symbol) :
+                            symbol.flags & 524288 ? getTypeFromTypeAliasReference(node, symbol) :
+                                getTypeFromNonGenericTypeReference(node, symbol);
+                }
+                links.resolvedSymbol = symbol;
+                links.resolvedType = type;
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeQueryNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getWidenedType(checkExpression(node.exprName));
+            }
+            return links.resolvedType;
+        }
+        function getTypeOfGlobalSymbol(symbol, arity) {
+            function getTypeDeclaration(symbol) {
+                var declarations = symbol.declarations;
+                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
+                    var declaration = declarations_3[_i];
+                    switch (declaration.kind) {
+                        case 221:
+                        case 222:
+                        case 224:
+                            return declaration;
+                    }
+                }
+            }
+            if (!symbol) {
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            var type = getDeclaredTypeOfSymbol(symbol);
+            if (!(type.flags & 80896)) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            if ((type.typeParameters ? type.typeParameters.length : 0) !== arity) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            return type;
+        }
+        function getGlobalValueSymbol(name) {
+            return getGlobalSymbol(name, 107455, ts.Diagnostics.Cannot_find_global_value_0);
+        }
+        function getGlobalTypeSymbol(name) {
+            return getGlobalSymbol(name, 793056, ts.Diagnostics.Cannot_find_global_type_0);
+        }
+        function getGlobalSymbol(name, meaning, diagnostic) {
+            return resolveName(undefined, name, meaning, diagnostic, name);
+        }
+        function getGlobalType(name, arity) {
+            if (arity === void 0) { arity = 0; }
+            return getTypeOfGlobalSymbol(getGlobalTypeSymbol(name), arity);
+        }
+        function getExportedTypeFromNamespace(namespace, name) {
+            var namespaceSymbol = getGlobalSymbol(namespace, 1536, undefined);
+            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793056);
+            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
+        }
+        function createTypedPropertyDescriptorType(propertyType) {
+            var globalTypedPropertyDescriptorType = getGlobalTypedPropertyDescriptorType();
+            return globalTypedPropertyDescriptorType !== emptyGenericType
+                ? createTypeReference(globalTypedPropertyDescriptorType, [propertyType])
+                : emptyObjectType;
+        }
+        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
+            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
+        }
+        function createIterableType(elementType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableType(), [elementType]);
+        }
+        function createIterableIteratorType(elementType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(), [elementType]);
+        }
+        function createArrayType(elementType) {
+            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
+        }
+        function getTypeFromArrayTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
+            }
+            return links.resolvedType;
+        }
+        function createTupleType(elementTypes) {
+            var id = getTypeListId(elementTypes);
+            return tupleTypes[id] || (tupleTypes[id] = createNewTupleType(elementTypes));
+        }
+        function createNewTupleType(elementTypes) {
+            var propagatedFlags = getPropagatingFlagsOfTypes(elementTypes, 0);
+            var type = createObjectType(8192 | propagatedFlags);
+            type.elementTypes = elementTypes;
+            return type;
+        }
+        function getTypeFromTupleTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNode));
+            }
+            return links.resolvedType;
+        }
+        function addTypeToSet(typeSet, type, typeSetKind) {
+            if (type.flags & typeSetKind) {
+                addTypesToSet(typeSet, type.types, typeSetKind);
+            }
+            else if (type.flags & (1 | 32 | 64)) {
+                if (type.flags & 1)
+                    typeSet.containsAny = true;
+                if (type.flags & 32)
+                    typeSet.containsUndefined = true;
+                if (type.flags & 64)
+                    typeSet.containsNull = true;
+                if (!(type.flags & 2097152))
+                    typeSet.containsNonWideningType = true;
+            }
+            else if (type !== neverType && !ts.contains(typeSet, type)) {
+                typeSet.push(type);
+            }
+        }
+        function addTypesToSet(typeSet, types, typeSetKind) {
+            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
+                var type = types_4[_i];
+                addTypeToSet(typeSet, type, typeSetKind);
+            }
+        }
+        function isSubtypeOfAny(candidate, types) {
+            for (var i = 0, len = types.length; i < len; i++) {
+                if (candidate !== types[i] && isTypeSubtypeOf(candidate, types[i])) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function removeSubtypes(types) {
+            var i = types.length;
+            while (i > 0) {
+                i--;
+                if (isSubtypeOfAny(types[i], types)) {
+                    types.splice(i, 1);
+                }
+            }
+        }
+        function getUnionType(types, noSubtypeReduction) {
+            if (types.length === 0) {
+                return neverType;
+            }
+            if (types.length === 1) {
+                return types[0];
+            }
+            var typeSet = [];
+            addTypesToSet(typeSet, types, 16384);
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (strictNullChecks) {
+                if (typeSet.containsNull)
+                    typeSet.push(nullType);
+                if (typeSet.containsUndefined)
+                    typeSet.push(undefinedType);
+            }
+            if (!noSubtypeReduction) {
+                removeSubtypes(typeSet);
+            }
+            if (typeSet.length === 0) {
+                return typeSet.containsNull ? typeSet.containsNonWideningType ? nullType : nullWideningType :
+                    typeSet.containsUndefined ? typeSet.containsNonWideningType ? undefinedType : undefinedWideningType :
+                        neverType;
+            }
+            else if (typeSet.length === 1) {
+                return typeSet[0];
+            }
+            var id = getTypeListId(typeSet);
+            var type = unionTypes[id];
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, 96);
+                type = unionTypes[id] = createObjectType(16384 | propagatedFlags);
+                type.types = typeSet;
+            }
+            return type;
+        }
+        function getTypeFromUnionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), true);
+            }
+            return links.resolvedType;
+        }
+        function getIntersectionType(types) {
+            if (types.length === 0) {
+                return emptyObjectType;
+            }
+            var typeSet = [];
+            addTypesToSet(typeSet, types, 32768);
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (strictNullChecks) {
+                if (typeSet.containsNull)
+                    typeSet.push(nullType);
+                if (typeSet.containsUndefined)
+                    typeSet.push(undefinedType);
+            }
+            if (typeSet.length === 1) {
+                return typeSet[0];
+            }
+            var id = getTypeListId(typeSet);
+            var type = intersectionTypes[id];
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, 96);
+                type = intersectionTypes[id] = createObjectType(32768 | propagatedFlags);
+                type.types = typeSet;
+            }
+            return type;
+        }
+        function getTypeFromIntersectionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNode));
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createObjectType(65536, node.symbol);
+            }
+            return links.resolvedType;
+        }
+        function getStringLiteralTypeForText(text) {
+            if (ts.hasProperty(stringLiteralTypes, text)) {
+                return stringLiteralTypes[text];
+            }
+            var type = stringLiteralTypes[text] = createType(256);
+            type.text = text;
+            return type;
+        }
+        function getTypeFromStringLiteralTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getStringLiteralTypeForText(ts.unescapeIdentifier(node.text));
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocVariadicType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var type = getTypeFromTypeNode(node.type);
+                links.resolvedType = type ? createArrayType(type) : unknownType;
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocTupleType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var types = ts.map(node.types, getTypeFromTypeNode);
+                links.resolvedType = createTupleType(types);
+            }
+            return links.resolvedType;
+        }
+        function getThisType(node) {
+            var container = ts.getThisContainer(node, false);
+            var parent = container && container.parent;
+            if (parent && (ts.isClassLike(parent) || parent.kind === 222)) {
+                if (!(container.flags & 32) &&
+                    (container.kind !== 148 || ts.isNodeDescendentOf(node, container.body))) {
+                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
+                }
+            }
+            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
+            return unknownType;
+        }
+        function getTypeFromThisTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getThisType(node);
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeNode(node) {
+            switch (node.kind) {
+                case 117:
+                case 258:
+                case 259:
+                    return anyType;
+                case 132:
+                    return stringType;
+                case 130:
+                    return numberType;
+                case 120:
+                    return booleanType;
+                case 133:
+                    return esSymbolType;
+                case 103:
+                    return voidType;
+                case 135:
+                    return undefinedType;
+                case 93:
+                    return nullType;
+                case 127:
+                    return neverType;
+                case 165:
+                case 97:
+                    return getTypeFromThisTypeNode(node);
+                case 166:
+                    return getTypeFromStringLiteralTypeNode(node);
+                case 155:
+                case 267:
+                    return getTypeFromTypeReference(node);
+                case 154:
+                    return booleanType;
+                case 194:
+                    return getTypeFromTypeReference(node);
+                case 158:
+                    return getTypeFromTypeQueryNode(node);
+                case 160:
+                case 260:
+                    return getTypeFromArrayTypeNode(node);
+                case 161:
+                    return getTypeFromTupleTypeNode(node);
+                case 162:
+                case 261:
+                    return getTypeFromUnionTypeNode(node);
+                case 163:
+                    return getTypeFromIntersectionTypeNode(node);
+                case 164:
+                case 263:
+                case 264:
+                case 271:
+                case 272:
+                case 268:
+                    return getTypeFromTypeNode(node.type);
+                case 156:
+                case 157:
+                case 159:
+                case 281:
+                case 269:
+                case 265:
+                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                case 69:
+                case 139:
+                    var symbol = getSymbolAtLocation(node);
+                    return symbol && getDeclaredTypeOfSymbol(symbol);
+                case 262:
+                    return getTypeFromJSDocTupleType(node);
+                case 270:
+                    return getTypeFromJSDocVariadicType(node);
+                default:
+                    return unknownType;
+            }
+        }
+        function instantiateList(items, mapper, instantiator) {
+            if (items && items.length) {
+                var result = [];
+                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
+                    var v = items_1[_i];
+                    result.push(instantiator(v, mapper));
+                }
+                return result;
+            }
+            return items;
+        }
+        function createUnaryTypeMapper(source, target) {
+            return function (t) { return t === source ? target : t; };
+        }
+        function createBinaryTypeMapper(source1, target1, source2, target2) {
+            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
+        }
+        function createArrayTypeMapper(sources, targets) {
+            return function (t) {
+                for (var i = 0; i < sources.length; i++) {
+                    if (t === sources[i]) {
+                        return targets ? targets[i] : anyType;
+                    }
+                }
+                return t;
+            };
+        }
+        function createTypeMapper(sources, targets) {
+            var count = sources.length;
+            var mapper = count == 1 ? createUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
+                count == 2 ? createBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
+                    createArrayTypeMapper(sources, targets);
+            mapper.mappedTypes = sources;
+            return mapper;
+        }
+        function createTypeEraser(sources) {
+            return createTypeMapper(sources, undefined);
+        }
+        function getInferenceMapper(context) {
+            if (!context.mapper) {
+                var mapper = function (t) {
+                    var typeParameters = context.typeParameters;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (t === typeParameters[i]) {
+                            context.inferences[i].isFixed = true;
+                            return getInferredType(context, i);
+                        }
+                    }
+                    return t;
+                };
+                mapper.mappedTypes = context.typeParameters;
+                mapper.context = context;
+                context.mapper = mapper;
+            }
+            return context.mapper;
+        }
+        function identityMapper(type) {
+            return type;
+        }
+        function combineTypeMappers(mapper1, mapper2) {
+            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
+            mapper.mappedTypes = mapper1.mappedTypes;
+            return mapper;
+        }
+        function cloneTypeParameter(typeParameter) {
+            var result = createType(512);
+            result.symbol = typeParameter.symbol;
+            result.target = typeParameter;
+            return result;
+        }
+        function cloneTypePredicate(predicate, mapper) {
+            if (ts.isIdentifierTypePredicate(predicate)) {
+                return {
+                    kind: 1,
+                    parameterName: predicate.parameterName,
+                    parameterIndex: predicate.parameterIndex,
+                    type: instantiateType(predicate.type, mapper)
+                };
+            }
+            else {
+                return {
+                    kind: 0,
+                    type: instantiateType(predicate.type, mapper)
+                };
+            }
+        }
+        function instantiateSignature(signature, mapper, eraseTypeParameters) {
+            var freshTypeParameters;
+            var freshTypePredicate;
+            if (signature.typeParameters && !eraseTypeParameters) {
+                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
+                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
+                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
+                    var tp = freshTypeParameters_1[_i];
+                    tp.mapper = mapper;
+                }
+            }
+            if (signature.typePredicate) {
+                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
+            }
+            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisType && instantiateType(signature.thisType, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), instantiateType(signature.resolvedReturnType, mapper), freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasStringLiterals);
+            result.target = signature;
+            result.mapper = mapper;
+            return result;
+        }
+        function instantiateSymbol(symbol, mapper) {
+            if (symbol.flags & 16777216) {
+                var links = getSymbolLinks(symbol);
+                symbol = links.target;
+                mapper = combineTypeMappers(links.mapper, mapper);
+            }
+            var result = createSymbol(16777216 | 67108864 | symbol.flags, symbol.name);
+            result.declarations = symbol.declarations;
+            result.parent = symbol.parent;
+            result.target = symbol;
+            result.mapper = mapper;
+            if (symbol.valueDeclaration) {
+                result.valueDeclaration = symbol.valueDeclaration;
+            }
+            return result;
+        }
+        function instantiateAnonymousType(type, mapper) {
+            if (mapper.instantiations) {
+                var cachedType = mapper.instantiations[type.id];
+                if (cachedType) {
+                    return cachedType;
+                }
+            }
+            else {
+                mapper.instantiations = [];
+            }
+            var result = createObjectType(65536 | 131072, type.symbol);
+            result.target = type;
+            result.mapper = mapper;
+            mapper.instantiations[type.id] = result;
+            return result;
+        }
+        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
+            var mappedTypes = mapper.mappedTypes;
+            var node = symbol.declarations[0].parent;
+            while (node) {
+                switch (node.kind) {
+                    case 156:
+                    case 157:
+                    case 220:
+                    case 147:
+                    case 146:
+                    case 148:
+                    case 151:
+                    case 152:
+                    case 153:
+                    case 149:
+                    case 150:
+                    case 179:
+                    case 180:
+                    case 221:
+                    case 192:
+                    case 222:
+                    case 223:
+                        var declaration = node;
+                        if (declaration.typeParameters) {
+                            for (var _i = 0, _a = declaration.typeParameters; _i < _a.length; _i++) {
+                                var d = _a[_i];
+                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
+                                    return true;
+                                }
+                            }
+                        }
+                        if (ts.isClassLike(node) || node.kind === 222) {
+                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
+                            if (thisType && ts.contains(mappedTypes, thisType)) {
+                                return true;
+                            }
+                        }
+                        break;
+                    case 225:
+                    case 256:
+                        return false;
+                }
+                node = node.parent;
+            }
+            return false;
+        }
+        function instantiateType(type, mapper) {
+            if (type && mapper !== identityMapper) {
+                if (type.flags & 512) {
+                    return mapper(type);
+                }
+                if (type.flags & 65536) {
+                    return type.symbol &&
+                        type.symbol.flags & (16 | 8192 | 32 | 2048 | 4096) &&
+                        (type.flags & 131072 || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
+                        instantiateAnonymousType(type, mapper) : type;
+                }
+                if (type.flags & 4096) {
+                    return createTypeReference(type.target, instantiateList(type.typeArguments, mapper, instantiateType));
+                }
+                if (type.flags & 8192) {
+                    return createTupleType(instantiateList(type.elementTypes, mapper, instantiateType));
+                }
+                if (type.flags & 16384) {
+                    return getUnionType(instantiateList(type.types, mapper, instantiateType), true);
+                }
+                if (type.flags & 32768) {
+                    return getIntersectionType(instantiateList(type.types, mapper, instantiateType));
+                }
+            }
+            return type;
+        }
+        function instantiateIndexInfo(info, mapper) {
+            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
+        }
+        function isContextSensitive(node) {
+            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
+            switch (node.kind) {
+                case 179:
+                case 180:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 171:
+                    return ts.forEach(node.properties, isContextSensitive);
+                case 170:
+                    return ts.forEach(node.elements, isContextSensitive);
+                case 188:
+                    return isContextSensitive(node.whenTrue) ||
+                        isContextSensitive(node.whenFalse);
+                case 187:
+                    return node.operatorToken.kind === 52 &&
+                        (isContextSensitive(node.left) || isContextSensitive(node.right));
+                case 253:
+                    return isContextSensitive(node.initializer);
+                case 147:
+                case 146:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 178:
+                    return isContextSensitive(node.expression);
+            }
+            return false;
+        }
+        function isContextSensitiveFunctionLikeDeclaration(node) {
+            var areAllParametersUntyped = !ts.forEach(node.parameters, function (p) { return p.type; });
+            var isNullaryArrow = node.kind === 180 && !node.parameters.length;
+            return !node.typeParameters && areAllParametersUntyped && !isNullaryArrow;
+        }
+        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
+            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
+        }
+        function getTypeWithoutSignatures(type) {
+            if (type.flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.constructSignatures.length) {
+                    var result = createObjectType(65536, type.symbol);
+                    result.members = resolved.members;
+                    result.properties = resolved.properties;
+                    result.callSignatures = emptyArray;
+                    result.constructSignatures = emptyArray;
+                    type = result;
+                }
+            }
+            return type;
+        }
+        function isTypeIdenticalTo(source, target) {
+            return checkTypeRelatedTo(source, target, identityRelation, undefined);
+        }
+        function compareTypesIdentical(source, target) {
+            return checkTypeRelatedTo(source, target, identityRelation, undefined) ? -1 : 0;
+        }
+        function compareTypesAssignable(source, target) {
+            return checkTypeRelatedTo(source, target, assignableRelation, undefined) ? -1 : 0;
+        }
+        function isTypeSubtypeOf(source, target) {
+            return checkTypeSubtypeOf(source, target, undefined);
+        }
+        function isTypeAssignableTo(source, target) {
+            return checkTypeAssignableTo(source, target, undefined);
+        }
+        function isTypeComparableTo(source, target) {
+            return checkTypeComparableTo(source, target, undefined);
+        }
+        function checkTypeSubtypeOf(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
+            return compareSignaturesRelated(source, target, ignoreReturnTypes, false, undefined, compareTypesAssignable) !== 0;
+        }
+        function compareSignaturesRelated(source, target, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
+            if (source === target) {
+                return -1;
+            }
+            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
+                return 0;
+            }
+            source = getErasedSignature(source);
+            target = getErasedSignature(target);
+            var result = -1;
+            if (source.thisType && target.thisType && source.thisType !== voidType) {
+                var related = compareTypes(source.thisType, target.thisType, false)
+                    || compareTypes(target.thisType, source.thisType, reportErrors);
+                if (!related) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
+                    }
+                    return 0;
+                }
+                result &= related;
+            }
+            var sourceMax = getNumNonRestParameters(source);
+            var targetMax = getNumNonRestParameters(target);
+            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
+            var sourceParams = source.parameters;
+            var targetParams = target.parameters;
+            for (var i = 0; i < checkCount; i++) {
+                var s = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
+                var t = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
+                var related = compareTypes(s, t, false) || compareTypes(t, s, reportErrors);
+                if (!related) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
+                    }
+                    return 0;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                var targetReturnType = getReturnTypeOfSignature(target);
+                if (targetReturnType === voidType) {
+                    return result;
+                }
+                var sourceReturnType = getReturnTypeOfSignature(source);
+                if (target.typePredicate) {
+                    if (source.typePredicate) {
+                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
+                    }
+                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
+                        if (reportErrors) {
+                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
+                        }
+                        return 0;
+                    }
+                }
+                else {
+                    result &= compareTypes(sourceReturnType, targetReturnType, reportErrors);
+                }
+            }
+            return result;
+        }
+        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
+            if (source.kind !== target.kind) {
+                if (reportErrors) {
+                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
+                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                }
+                return 0;
+            }
+            if (source.kind === 1) {
+                var sourceIdentifierPredicate = source;
+                var targetIdentifierPredicate = target;
+                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
+                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                    }
+                    return 0;
+                }
+            }
+            var related = compareTypes(source.type, target.type, reportErrors);
+            if (related === 0 && reportErrors) {
+                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+            }
+            return related;
+        }
+        function isImplementationCompatibleWithOverload(implementation, overload) {
+            var erasedSource = getErasedSignature(implementation);
+            var erasedTarget = getErasedSignature(overload);
+            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
+            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
+            if (targetReturnType === voidType
+                || checkTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation, undefined)
+                || checkTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation, undefined)) {
+                return isSignatureAssignableTo(erasedSource, erasedTarget, true);
+            }
+            return false;
+        }
+        function getNumNonRestParameters(signature) {
+            var numParams = signature.parameters.length;
+            return signature.hasRestParameter ?
+                numParams - 1 :
+                numParams;
+        }
+        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
+            if (source.hasRestParameter === target.hasRestParameter) {
+                if (source.hasRestParameter) {
+                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
+                }
+                else {
+                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
+                }
+            }
+            else {
+                return source.hasRestParameter ?
+                    targetNonRestParamCount :
+                    sourceNonRestParamCount;
+            }
+        }
+        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
+            var errorInfo;
+            var sourceStack;
+            var targetStack;
+            var maybeStack;
+            var expandingFlags;
+            var depth = 0;
+            var overflow = false;
+            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
+            var result = isRelatedTo(source, target, !!errorNode, headMessage);
+            if (overflow) {
+                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
+            }
+            else if (errorInfo) {
+                if (containingMessageChain) {
+                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
+                }
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
+            }
+            return result !== 0;
+            function reportError(message, arg0, arg1, arg2) {
+                ts.Debug.assert(!!errorNode);
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+            }
+            function reportRelationError(message, source, target) {
+                var sourceType = typeToString(source);
+                var targetType = typeToString(target);
+                if (sourceType === targetType) {
+                    sourceType = typeToString(source, undefined, 128);
+                    targetType = typeToString(target, undefined, 128);
+                }
+                if (!message) {
+                    message = relation === comparableRelation ?
+                        ts.Diagnostics.Type_0_is_not_comparable_to_type_1 :
+                        ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
+                }
+                reportError(message, sourceType, targetType);
+            }
+            function isRelatedTo(source, target, reportErrors, headMessage) {
+                var result;
+                if (source === target)
+                    return -1;
+                if (relation === identityRelation) {
+                    return isIdenticalTo(source, target);
+                }
+                if (!(target.flags & 134217728)) {
+                    if (target.flags & 1 || source.flags & 134217728)
+                        return -1;
+                    if (source.flags & 32) {
+                        if (!strictNullChecks || target.flags & (32 | 16))
+                            return -1;
+                    }
+                    if (source.flags & 64) {
+                        if (!strictNullChecks || target.flags & 64)
+                            return -1;
+                    }
+                    if (source.flags & 128 && target === numberType)
+                        return -1;
+                    if (source.flags & 128 && target.flags & 128) {
+                        if (result = enumRelatedTo(source, target, reportErrors)) {
+                            return result;
+                        }
+                    }
+                    if (source.flags & 256 && target === stringType)
+                        return -1;
+                    if (relation === assignableRelation || relation === comparableRelation) {
+                        if (source.flags & 1)
+                            return -1;
+                        if (source === numberType && target.flags & 128)
+                            return -1;
+                    }
+                    if (source.flags & 8 && target.flags & 8) {
+                        return -1;
+                    }
+                }
+                if (source.flags & 1048576) {
+                    if (hasExcessProperties(source, target, reportErrors)) {
+                        if (reportErrors) {
+                            reportRelationError(headMessage, source, target);
+                        }
+                        return 0;
+                    }
+                    if (target.flags & 49152) {
+                        source = getRegularTypeOfObjectLiteral(source);
+                    }
+                }
+                var saveErrorInfo = errorInfo;
+                if (source.flags & 16384) {
+                    if (relation === comparableRelation) {
+                        result = someTypeRelatedToType(source, target, reportErrors);
+                    }
+                    else {
+                        result = eachTypeRelatedToType(source, target, reportErrors);
+                    }
+                    if (result) {
+                        return result;
+                    }
+                }
+                else if (target.flags & 32768) {
+                    result = typeRelatedToEachType(source, target, reportErrors);
+                    if (result) {
+                        return result;
+                    }
+                }
+                else {
+                    if (source.flags & 32768) {
+                        if (result = someTypeRelatedToType(source, target, false)) {
+                            return result;
+                        }
+                    }
+                    if (target.flags & 16384) {
+                        if (result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 16777726))) {
+                            return result;
+                        }
+                    }
+                }
+                if (source.flags & 512) {
+                    var constraint = getConstraintOfTypeParameter(source);
+                    if (!constraint || constraint.flags & 1) {
+                        constraint = emptyObjectType;
+                    }
+                    constraint = getTypeWithThisArgument(constraint, source);
+                    var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
+                    if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
+                        errorInfo = saveErrorInfo;
+                        return result;
+                    }
+                }
+                else {
+                    if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
+                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
+                            return result;
+                        }
+                    }
+                    var apparentSource = getApparentType(source);
+                    if (apparentSource.flags & (80896 | 32768) && target.flags & 80896) {
+                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !(source.flags & 16777726);
+                        if (result = objectTypeRelatedTo(apparentSource, source, target, reportStructuralErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
+                    }
+                }
+                if (reportErrors) {
+                    reportRelationError(headMessage, source, target);
+                }
+                return 0;
+            }
+            function isIdenticalTo(source, target) {
+                var result;
+                if (source.flags & 80896 && target.flags & 80896) {
+                    if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
+                        if (result = typeArgumentsRelatedTo(source, target, false)) {
+                            return result;
+                        }
+                    }
+                    return objectTypeRelatedTo(source, source, target, false);
+                }
+                if (source.flags & 16384 && target.flags & 16384 ||
+                    source.flags & 32768 && target.flags & 32768) {
+                    if (result = eachTypeRelatedToSomeType(source, target, false)) {
+                        if (result &= eachTypeRelatedToSomeType(target, source, false)) {
+                            return result;
+                        }
+                    }
+                }
+                return 0;
+            }
+            function isKnownProperty(type, name) {
+                if (type.flags & 80896) {
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if ((relation === assignableRelation || relation === comparableRelation) && (type === globalObjectType || isEmptyObjectType(resolved)) ||
+                        resolved.stringIndexInfo ||
+                        (resolved.numberIndexInfo && isNumericLiteralName(name)) ||
+                        getPropertyOfType(type, name)) {
+                        return true;
+                    }
+                }
+                else if (type.flags & 49152) {
+                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                        var t = _a[_i];
+                        if (isKnownProperty(t, name)) {
+                            return true;
+                        }
+                    }
+                }
+                return false;
+            }
+            function isEmptyObjectType(t) {
+                return t.properties.length === 0 &&
+                    t.callSignatures.length === 0 &&
+                    t.constructSignatures.length === 0 &&
+                    !t.stringIndexInfo &&
+                    !t.numberIndexInfo;
+            }
+            function hasExcessProperties(source, target, reportErrors) {
+                if (!(target.flags & 67108864) && maybeTypeOfKind(target, 80896)) {
+                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                        var prop = _a[_i];
+                        if (!isKnownProperty(target, prop.name)) {
+                            if (reportErrors) {
+                                ts.Debug.assert(!!errorNode);
+                                errorNode = prop.valueDeclaration;
+                                reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
+                            }
+                            return true;
+                        }
+                    }
+                }
+                return false;
+            }
+            function eachTypeRelatedToSomeType(source, target, reportErrors) {
+                var result = -1;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
+                    var sourceType = sourceTypes_1[_i];
+                    var related = typeRelatedToSomeType(sourceType, target, false);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeRelatedToSomeType(source, target, reportErrors) {
+                var targetTypes = target.types;
+                var len = targetTypes.length;
+                while (len >= 2 && targetTypes[len - 1].flags & 96) {
+                    var related = isRelatedTo(source, targetTypes[len - 1], false);
+                    if (related) {
+                        return related;
+                    }
+                    len--;
+                }
+                for (var i = 0; i < len; i++) {
+                    var related = isRelatedTo(source, targetTypes[i], reportErrors && i === len - 1);
+                    if (related) {
+                        return related;
+                    }
+                }
+                return 0;
+            }
+            function typeRelatedToEachType(source, target, reportErrors) {
+                var result = -1;
+                var targetTypes = target.types;
+                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
+                    var targetType = targetTypes_1[_i];
+                    var related = isRelatedTo(source, targetType, reportErrors);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function someTypeRelatedToType(source, target, reportErrors) {
+                var sourceTypes = source.types;
+                var len = sourceTypes.length;
+                while (len >= 2 && sourceTypes[len - 1].flags & 96) {
+                    var related = isRelatedTo(sourceTypes[len - 1], target, false);
+                    if (related) {
+                        return related;
+                    }
+                    len--;
+                }
+                for (var i = 0; i < len; i++) {
+                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
+                    if (related) {
+                        return related;
+                    }
+                }
+                return 0;
+            }
+            function eachTypeRelatedToType(source, target, reportErrors) {
+                var result = -1;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
+                    var sourceType = sourceTypes_2[_i];
+                    var related = isRelatedTo(sourceType, target, reportErrors);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeArgumentsRelatedTo(source, target, reportErrors) {
+                var sources = source.typeArguments || emptyArray;
+                var targets = target.typeArguments || emptyArray;
+                if (sources.length !== targets.length && relation === identityRelation) {
+                    return 0;
+                }
+                var length = sources.length <= targets.length ? sources.length : targets.length;
+                var result = -1;
+                for (var i = 0; i < length; i++) {
+                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function objectTypeRelatedTo(source, originalSource, target, reportErrors) {
+                if (overflow) {
+                    return 0;
+                }
+                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
+                var related = relation[id];
+                if (related !== undefined) {
+                    if (reportErrors && related === 2) {
+                        relation[id] = 3;
+                    }
+                    else {
+                        return related === 1 ? -1 : 0;
+                    }
+                }
+                if (depth > 0) {
+                    for (var i = 0; i < depth; i++) {
+                        if (maybeStack[i][id]) {
+                            return 1;
+                        }
+                    }
+                    if (depth === 100) {
+                        overflow = true;
+                        return 0;
+                    }
+                }
+                else {
+                    sourceStack = [];
+                    targetStack = [];
+                    maybeStack = [];
+                    expandingFlags = 0;
+                }
+                sourceStack[depth] = source;
+                targetStack[depth] = target;
+                maybeStack[depth] = {};
+                maybeStack[depth][id] = 1;
+                depth++;
+                var saveExpandingFlags = expandingFlags;
+                if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth))
+                    expandingFlags |= 1;
+                if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth))
+                    expandingFlags |= 2;
+                var result;
+                if (expandingFlags === 3) {
+                    result = 1;
+                }
+                else {
+                    result = propertiesRelatedTo(source, target, reportErrors);
+                    if (result) {
+                        result &= signaturesRelatedTo(source, target, 0, reportErrors);
+                        if (result) {
+                            result &= signaturesRelatedTo(source, target, 1, reportErrors);
+                            if (result) {
+                                result &= indexTypesRelatedTo(source, originalSource, target, 0, reportErrors);
+                                if (result) {
+                                    result &= indexTypesRelatedTo(source, originalSource, target, 1, reportErrors);
+                                }
+                            }
+                        }
+                    }
+                }
+                expandingFlags = saveExpandingFlags;
+                depth--;
+                if (result) {
+                    var maybeCache = maybeStack[depth];
+                    var destinationCache = (result === -1 || depth === 0) ? relation : maybeStack[depth - 1];
+                    ts.copyMap(maybeCache, destinationCache);
+                }
+                else {
+                    relation[id] = reportErrors ? 3 : 2;
+                }
+                return result;
+            }
+            function propertiesRelatedTo(source, target, reportErrors) {
+                if (relation === identityRelation) {
+                    return propertiesIdenticalTo(source, target);
+                }
+                var result = -1;
+                var properties = getPropertiesOfObjectType(target);
+                var requireOptionalProperties = relation === subtypeRelation && !(source.flags & 524288);
+                for (var _i = 0, properties_1 = properties; _i < properties_1.length; _i++) {
+                    var targetProp = properties_1[_i];
+                    var sourceProp = getPropertyOfType(source, targetProp.name);
+                    if (sourceProp !== targetProp) {
+                        if (!sourceProp) {
+                            if (!(targetProp.flags & 536870912) || requireOptionalProperties) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
+                                }
+                                return 0;
+                            }
+                        }
+                        else if (!(targetProp.flags & 134217728)) {
+                            var sourcePropFlags = getDeclarationFlagsFromSymbol(sourceProp);
+                            var targetPropFlags = getDeclarationFlagsFromSymbol(targetProp);
+                            if (sourcePropFlags & 8 || targetPropFlags & 8) {
+                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
+                                    if (reportErrors) {
+                                        if (sourcePropFlags & 8 && targetPropFlags & 8) {
+                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
+                                        }
+                                        else {
+                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 ? source : target), typeToString(sourcePropFlags & 8 ? target : source));
+                                        }
+                                    }
+                                    return 0;
+                                }
+                            }
+                            else if (targetPropFlags & 16) {
+                                var sourceDeclaredInClass = sourceProp.parent && sourceProp.parent.flags & 32;
+                                var sourceClass = sourceDeclaredInClass ? getDeclaredTypeOfSymbol(getParentOfSymbol(sourceProp)) : undefined;
+                                var targetClass = getDeclaredTypeOfSymbol(getParentOfSymbol(targetProp));
+                                if (!sourceClass || !hasBaseType(sourceClass, targetClass)) {
+                                    if (reportErrors) {
+                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(sourceClass || source), typeToString(targetClass));
+                                    }
+                                    return 0;
+                                }
+                            }
+                            else if (sourcePropFlags & 16) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0;
+                            }
+                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
+                            if (!related) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
+                                }
+                                return 0;
+                            }
+                            result &= related;
+                            if (sourceProp.flags & 536870912 && !(targetProp.flags & 536870912)) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0;
+                            }
+                        }
+                    }
+                }
+                return result;
+            }
+            function propertiesIdenticalTo(source, target) {
+                if (!(source.flags & 80896 && target.flags & 80896)) {
+                    return 0;
+                }
+                var sourceProperties = getPropertiesOfObjectType(source);
+                var targetProperties = getPropertiesOfObjectType(target);
+                if (sourceProperties.length !== targetProperties.length) {
+                    return 0;
+                }
+                var result = -1;
+                for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
+                    var sourceProp = sourceProperties_1[_i];
+                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
+                    if (!targetProp) {
+                        return 0;
+                    }
+                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function signaturesRelatedTo(source, target, kind, reportErrors) {
+                if (relation === identityRelation) {
+                    return signaturesIdenticalTo(source, target, kind);
+                }
+                if (target === anyFunctionType || source === anyFunctionType) {
+                    return -1;
+                }
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (kind === 1 && sourceSignatures.length && targetSignatures.length) {
+                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
+                        if (reportErrors) {
+                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
+                        }
+                        return 0;
+                    }
+                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
+                        return 0;
+                    }
+                }
+                var result = -1;
+                var saveErrorInfo = errorInfo;
+                outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
+                    var t = targetSignatures_1[_i];
+                    var shouldElaborateErrors = reportErrors;
+                    for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
+                        var s = sourceSignatures_1[_a];
+                        var related = signatureRelatedTo(s, t, shouldElaborateErrors);
+                        if (related) {
+                            result &= related;
+                            errorInfo = saveErrorInfo;
+                            continue outer;
+                        }
+                        shouldElaborateErrors = false;
+                    }
+                    if (shouldElaborateErrors) {
+                        reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, undefined, undefined, kind));
+                    }
+                    return 0;
+                }
+                return result;
+            }
+            function signatureRelatedTo(source, target, reportErrors) {
+                return compareSignaturesRelated(source, target, false, reportErrors, reportError, isRelatedTo);
+            }
+            function signaturesIdenticalTo(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (sourceSignatures.length !== targetSignatures.length) {
+                    return 0;
+                }
+                var result = -1;
+                for (var i = 0, len = sourceSignatures.length; i < len; i++) {
+                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], false, false, false, isRelatedTo);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
+                var result = -1;
+                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 || isNumericLiteralName(prop.name)) {
+                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
+                        if (!related) {
+                            if (reportErrors) {
+                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
+                            }
+                            return 0;
+                        }
+                        result &= related;
+                    }
+                }
+                return result;
+            }
+            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
+                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
+                if (!related && reportErrors) {
+                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
+                }
+                return related;
+            }
+            function indexTypesRelatedTo(source, originalSource, target, kind, reportErrors) {
+                if (relation === identityRelation) {
+                    return indexTypesIdenticalTo(source, target, kind);
+                }
+                var targetInfo = getIndexInfoOfType(target, kind);
+                if (!targetInfo || ((targetInfo.type.flags & 1) && !(originalSource.flags & 16777726))) {
+                    return -1;
+                }
+                var sourceInfo = getIndexInfoOfType(source, kind) ||
+                    kind === 1 && getIndexInfoOfType(source, 0);
+                if (sourceInfo) {
+                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
+                }
+                if (isObjectLiteralType(source)) {
+                    var related = -1;
+                    if (kind === 0) {
+                        var sourceNumberInfo = getIndexInfoOfType(source, 1);
+                        if (sourceNumberInfo) {
+                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
+                        }
+                    }
+                    if (related) {
+                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
+                    }
+                    return related;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
+                }
+                return 0;
+            }
+            function indexTypesIdenticalTo(source, target, indexKind) {
+                var targetInfo = getIndexInfoOfType(target, indexKind);
+                var sourceInfo = getIndexInfoOfType(source, indexKind);
+                if (!sourceInfo && !targetInfo) {
+                    return -1;
+                }
+                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
+                    return isRelatedTo(sourceInfo.type, targetInfo.type);
+                }
+                return 0;
+            }
+            function enumRelatedTo(source, target, reportErrors) {
+                if (source.symbol.name !== target.symbol.name ||
+                    source.symbol.flags & 128 ||
+                    target.symbol.flags & 128) {
+                    return 0;
+                }
+                var targetEnumType = getTypeOfSymbol(target.symbol);
+                for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
+                    var property = _a[_i];
+                    if (property.flags & 8) {
+                        var targetProperty = getPropertyOfType(targetEnumType, property.name);
+                        if (!targetProperty || !(targetProperty.flags & 8)) {
+                            if (reportErrors) {
+                                reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, undefined, 128));
+                            }
+                            return 0;
+                        }
+                    }
+                }
+                return -1;
+            }
+            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
+                if (!sourceSignature.declaration || !targetSignature.declaration) {
+                    return true;
+                }
+                var sourceAccessibility = sourceSignature.declaration.flags & (8 | 16);
+                var targetAccessibility = targetSignature.declaration.flags & (8 | 16);
+                if (targetAccessibility === 8) {
+                    return true;
+                }
+                if (targetAccessibility === 16 && sourceAccessibility !== 8) {
+                    return true;
+                }
+                if (targetAccessibility !== 16 && !sourceAccessibility) {
+                    return true;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
+                }
+                return false;
+            }
+        }
+        function isAbstractConstructorType(type) {
+            if (type.flags & 65536) {
+                var symbol = type.symbol;
+                if (symbol && symbol.flags & 32) {
+                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
+                    if (declaration && declaration.flags & 128) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isDeeplyNestedGeneric(type, stack, depth) {
+            if (type.flags & (4096 | 131072) && depth >= 5) {
+                var symbol = type.symbol;
+                var count = 0;
+                for (var i = 0; i < depth; i++) {
+                    var t = stack[i];
+                    if (t.flags & (4096 | 131072) && t.symbol === symbol) {
+                        count++;
+                        if (count >= 5)
+                            return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isPropertyIdenticalTo(sourceProp, targetProp) {
+            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0;
+        }
+        function compareProperties(sourceProp, targetProp, compareTypes) {
+            if (sourceProp === targetProp) {
+                return -1;
+            }
+            var sourcePropAccessibility = getDeclarationFlagsFromSymbol(sourceProp) & (8 | 16);
+            var targetPropAccessibility = getDeclarationFlagsFromSymbol(targetProp) & (8 | 16);
+            if (sourcePropAccessibility !== targetPropAccessibility) {
+                return 0;
+            }
+            if (sourcePropAccessibility) {
+                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
+                    return 0;
+                }
+            }
+            else {
+                if ((sourceProp.flags & 536870912) !== (targetProp.flags & 536870912)) {
+                    return 0;
+                }
+            }
+            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
+                return 0;
+            }
+            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+        }
+        function isMatchingSignature(source, target, partialMatch) {
+            if (source.parameters.length === target.parameters.length &&
+                source.minArgumentCount === target.minArgumentCount &&
+                source.hasRestParameter === target.hasRestParameter) {
+                return true;
+            }
+            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (source.hasRestParameter && !target.hasRestParameter ||
+                source.hasRestParameter === target.hasRestParameter && source.parameters.length >= target.parameters.length)) {
+                return true;
+            }
+            return false;
+        }
+        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
+            if (source === target) {
+                return -1;
+            }
+            if (!(isMatchingSignature(source, target, partialMatch))) {
+                return 0;
+            }
+            if ((source.typeParameters ? source.typeParameters.length : 0) !== (target.typeParameters ? target.typeParameters.length : 0)) {
+                return 0;
+            }
+            source = getErasedSignature(source);
+            target = getErasedSignature(target);
+            var result = -1;
+            if (!ignoreThisTypes && source.thisType && target.thisType) {
+                var related = compareTypes(source.thisType, target.thisType);
+                if (!related) {
+                    return 0;
+                }
+                result &= related;
+            }
+            var targetLen = target.parameters.length;
+            for (var i = 0; i < targetLen; i++) {
+                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
+                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
+                var related = compareTypes(s, t);
+                if (!related) {
+                    return 0;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+            }
+            return result;
+        }
+        function isRestParameterIndex(signature, parameterIndex) {
+            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
+        }
+        function isSupertypeOfEach(candidate, types) {
+            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
+                var t = types_5[_i];
+                if (candidate !== t && !isTypeSubtypeOf(t, candidate))
+                    return false;
+            }
+            return true;
+        }
+        function getCombinedFlagsOfTypes(types) {
+            var flags = 0;
+            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
+                var t = types_6[_i];
+                flags |= t.flags;
+            }
+            return flags;
+        }
+        function getCommonSupertype(types) {
+            if (!strictNullChecks) {
+                return ts.forEach(types, function (t) { return isSupertypeOfEach(t, types) ? t : undefined; });
+            }
+            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 96); });
+            if (!primaryTypes.length) {
+                return getUnionType(types);
+            }
+            var supertype = ts.forEach(primaryTypes, function (t) { return isSupertypeOfEach(t, primaryTypes) ? t : undefined; });
+            return supertype && addTypeKind(supertype, getCombinedFlagsOfTypes(types) & 96);
+        }
+        function reportNoCommonSupertypeError(types, errorLocation, errorMessageChainHead) {
+            var bestSupertype;
+            var bestSupertypeDownfallType;
+            var bestSupertypeScore = 0;
+            for (var i = 0; i < types.length; i++) {
+                var score = 0;
+                var downfallType = undefined;
+                for (var j = 0; j < types.length; j++) {
+                    if (isTypeSubtypeOf(types[j], types[i])) {
+                        score++;
+                    }
+                    else if (!downfallType) {
+                        downfallType = types[j];
+                    }
+                }
+                ts.Debug.assert(!!downfallType, "If there is no common supertype, each type should have a downfallType");
+                if (score > bestSupertypeScore) {
+                    bestSupertype = types[i];
+                    bestSupertypeDownfallType = downfallType;
+                    bestSupertypeScore = score;
+                }
+                if (bestSupertypeScore === types.length - 1) {
+                    break;
+                }
+            }
+            checkTypeSubtypeOf(bestSupertypeDownfallType, bestSupertype, errorLocation, ts.Diagnostics.Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0, errorMessageChainHead);
+        }
+        function isArrayType(type) {
+            return type.flags & 4096 && type.target === globalArrayType;
+        }
+        function isArrayLikeType(type) {
+            return type.flags & 4096 && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
+                !(type.flags & 96) && isTypeAssignableTo(type, anyReadonlyArrayType);
+        }
+        function isTupleLikeType(type) {
+            return !!getPropertyOfType(type, "0");
+        }
+        function isStringLiteralType(type) {
+            return type.flags & 256;
+        }
+        function isTupleType(type) {
+            return !!(type.flags & 8192);
+        }
+        function getCombinedTypeFlags(type) {
+            return type.flags & 16384 ? getCombinedFlagsOfTypes(type.types) : type.flags;
+        }
+        function addTypeKind(type, kind) {
+            if ((getCombinedTypeFlags(type) & kind) === kind) {
+                return type;
+            }
+            var types = [type];
+            if (kind & 2)
+                types.push(stringType);
+            if (kind & 4)
+                types.push(numberType);
+            if (kind & 8)
+                types.push(booleanType);
+            if (kind & 16)
+                types.push(voidType);
+            if (kind & 32)
+                types.push(undefinedType);
+            if (kind & 64)
+                types.push(nullType);
+            return getUnionType(types);
+        }
+        function getNonNullableType(type) {
+            return strictNullChecks ? getTypeWithFacts(type, 524288) : type;
+        }
+        function isObjectLiteralType(type) {
+            return type.symbol && (type.symbol.flags & (4096 | 2048)) !== 0 &&
+                getSignaturesOfType(type, 0).length === 0 &&
+                getSignaturesOfType(type, 1).length === 0;
+        }
+        function createTransientSymbol(source, type) {
+            var symbol = createSymbol(source.flags | 67108864, source.name);
+            symbol.declarations = source.declarations;
+            symbol.parent = source.parent;
+            symbol.type = type;
+            symbol.target = source;
+            if (source.valueDeclaration) {
+                symbol.valueDeclaration = source.valueDeclaration;
+            }
+            return symbol;
+        }
+        function transformTypeOfMembers(type, f) {
+            var members = {};
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var property = _a[_i];
+                var original = getTypeOfSymbol(property);
+                var updated = f(original);
+                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
+            }
+            ;
+            return members;
+        }
+        function getRegularTypeOfObjectLiteral(type) {
+            if (!(type.flags & 1048576)) {
+                return type;
+            }
+            var regularType = type.regularType;
+            if (regularType) {
+                return regularType;
+            }
+            var resolved = type;
+            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
+            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
+            regularNew.flags = resolved.flags & ~1048576;
+            type.regularType = regularNew;
+            return regularNew;
+        }
+        function getWidenedTypeOfObjectLiteral(type) {
+            var members = transformTypeOfMembers(type, function (prop) {
+                var widened = getWidenedType(prop);
+                return prop === widened ? prop : widened;
+            });
+            var stringIndexInfo = getIndexInfoOfType(type, 0);
+            var numberIndexInfo = getIndexInfoOfType(type, 1);
+            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
+        }
+        function getWidenedConstituentType(type) {
+            return type.flags & 96 ? type : getWidenedType(type);
+        }
+        function getWidenedType(type) {
+            if (type.flags & 6291456) {
+                if (type.flags & 96) {
+                    return anyType;
+                }
+                if (type.flags & 524288) {
+                    return getWidenedTypeOfObjectLiteral(type);
+                }
+                if (type.flags & 16384) {
+                    return getUnionType(ts.map(type.types, getWidenedConstituentType), true);
+                }
+                if (isArrayType(type)) {
+                    return createArrayType(getWidenedType(type.typeArguments[0]));
+                }
+                if (isTupleType(type)) {
+                    return createTupleType(ts.map(type.elementTypes, getWidenedType));
+                }
+            }
+            return type;
+        }
+        function reportWideningErrorsInType(type) {
+            var errorReported = false;
+            if (type.flags & 16384) {
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
+                }
+            }
+            if (isArrayType(type)) {
+                return reportWideningErrorsInType(type.typeArguments[0]);
+            }
+            if (isTupleType(type)) {
+                for (var _b = 0, _c = type.elementTypes; _b < _c.length; _b++) {
+                    var t = _c[_b];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
+                }
+            }
+            if (type.flags & 524288) {
+                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
+                    var p = _e[_d];
+                    var t = getTypeOfSymbol(p);
+                    if (t.flags & 2097152) {
+                        if (!reportWideningErrorsInType(t)) {
+                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
+                        }
+                        errorReported = true;
+                    }
+                }
+            }
+            return errorReported;
+        }
+        function reportImplicitAnyError(declaration, type) {
+            var typeAsString = typeToString(getWidenedType(type));
+            var diagnostic;
+            switch (declaration.kind) {
+                case 145:
+                case 144:
+                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
+                    break;
+                case 142:
+                    diagnostic = declaration.dotDotDotToken ?
+                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
+                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
+                    break;
+                case 169:
+                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
+                    break;
+                case 220:
+                case 147:
+                case 146:
+                case 149:
+                case 150:
+                case 179:
+                case 180:
+                    if (!declaration.name) {
+                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
+                        return;
+                    }
+                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
+                    break;
+                default:
+                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
+            }
+            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
+        }
+        function reportErrorsFromWidening(declaration, type) {
+            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & 2097152) {
+                if (!reportWideningErrorsInType(type)) {
+                    reportImplicitAnyError(declaration, type);
+                }
+            }
+        }
+        function forEachMatchingParameterType(source, target, callback) {
+            var sourceMax = source.parameters.length;
+            var targetMax = target.parameters.length;
+            var count;
+            if (source.hasRestParameter && target.hasRestParameter) {
+                count = Math.max(sourceMax, targetMax);
+            }
+            else if (source.hasRestParameter) {
+                count = targetMax;
+            }
+            else if (target.hasRestParameter) {
+                count = sourceMax;
+            }
+            else {
+                count = Math.min(sourceMax, targetMax);
+            }
+            for (var i = 0; i < count; i++) {
+                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
+            }
+        }
+        function createInferenceContext(typeParameters, inferUnionTypes) {
+            var inferences = ts.map(typeParameters, createTypeInferencesObject);
+            return {
+                typeParameters: typeParameters,
+                inferUnionTypes: inferUnionTypes,
+                inferences: inferences,
+                inferredTypes: new Array(typeParameters.length)
+            };
+        }
+        function createTypeInferencesObject() {
+            return {
+                primary: undefined,
+                secondary: undefined,
+                isFixed: false
+            };
+        }
+        function inferTypes(context, source, target) {
+            var sourceStack;
+            var targetStack;
+            var depth = 0;
+            var inferiority = 0;
+            var visited = {};
+            inferFromTypes(source, target);
+            function isInProcess(source, target) {
+                for (var i = 0; i < depth; i++) {
+                    if (source === sourceStack[i] && target === targetStack[i]) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function inferFromTypes(source, target) {
+                if (source.flags & 16384 && target.flags & 16384 ||
+                    source.flags & 32768 && target.flags & 32768) {
+                    var matchingTypes = void 0;
+                    for (var _i = 0, _a = target.types; _i < _a.length; _i++) {
+                        var t = _a[_i];
+                        if (typeIdenticalToSomeType(t, source.types)) {
+                            (matchingTypes || (matchingTypes = [])).push(t);
+                            inferFromTypes(t, t);
+                        }
+                    }
+                    if (matchingTypes) {
+                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
+                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
+                    }
+                }
+                if (target.flags & 512) {
+                    if (source.flags & 8388608) {
+                        return;
+                    }
+                    var typeParameters = context.typeParameters;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (target === typeParameters[i]) {
+                            var inferences = context.inferences[i];
+                            if (!inferences.isFixed) {
+                                var candidates = inferiority ?
+                                    inferences.secondary || (inferences.secondary = []) :
+                                    inferences.primary || (inferences.primary = []);
+                                if (!ts.contains(candidates, source)) {
+                                    candidates.push(source);
+                                }
+                            }
+                            return;
+                        }
+                    }
+                }
+                else if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
+                    var sourceTypes = source.typeArguments || emptyArray;
+                    var targetTypes = target.typeArguments || emptyArray;
+                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
+                    for (var i = 0; i < count; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
+                }
+                else if (source.flags & 8192 && target.flags & 8192 && source.elementTypes.length === target.elementTypes.length) {
+                    var sourceTypes = source.elementTypes;
+                    var targetTypes = target.elementTypes;
+                    for (var i = 0; i < sourceTypes.length; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
+                }
+                else if (target.flags & 49152) {
+                    var targetTypes = target.types;
+                    var typeParameterCount = 0;
+                    var typeParameter = void 0;
+                    for (var _b = 0, targetTypes_2 = targetTypes; _b < targetTypes_2.length; _b++) {
+                        var t = targetTypes_2[_b];
+                        if (t.flags & 512 && ts.contains(context.typeParameters, t)) {
+                            typeParameter = t;
+                            typeParameterCount++;
+                        }
+                        else {
+                            inferFromTypes(source, t);
+                        }
+                    }
+                    if (typeParameterCount === 1) {
+                        inferiority++;
+                        inferFromTypes(source, typeParameter);
+                        inferiority--;
+                    }
+                }
+                else if (source.flags & 49152) {
+                    var sourceTypes = source.types;
+                    for (var _c = 0, sourceTypes_3 = sourceTypes; _c < sourceTypes_3.length; _c++) {
+                        var sourceType = sourceTypes_3[_c];
+                        inferFromTypes(sourceType, target);
+                    }
+                }
+                else {
+                    source = getApparentType(source);
+                    if (source.flags & 80896 && (target.flags & 4096 && target.typeArguments ||
+                        target.flags & 8192 ||
+                        target.flags & 65536 && target.symbol && target.symbol.flags & (8192 | 2048 | 32))) {
+                        if (isInProcess(source, target)) {
+                            return;
+                        }
+                        if (isDeeplyNestedGeneric(source, sourceStack, depth) && isDeeplyNestedGeneric(target, targetStack, depth)) {
+                            return;
+                        }
+                        var key = source.id + "," + target.id;
+                        if (ts.hasProperty(visited, key)) {
+                            return;
+                        }
+                        visited[key] = true;
+                        if (depth === 0) {
+                            sourceStack = [];
+                            targetStack = [];
+                        }
+                        sourceStack[depth] = source;
+                        targetStack[depth] = target;
+                        depth++;
+                        inferFromProperties(source, target);
+                        inferFromSignatures(source, target, 0);
+                        inferFromSignatures(source, target, 1);
+                        inferFromIndexTypes(source, target);
+                        depth--;
+                    }
+                }
+            }
+            function inferFromProperties(source, target) {
+                var properties = getPropertiesOfObjectType(target);
+                for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
+                    var targetProp = properties_2[_i];
+                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
+                    if (sourceProp) {
+                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+                    }
+                }
+            }
+            function inferFromSignatures(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                var sourceLen = sourceSignatures.length;
+                var targetLen = targetSignatures.length;
+                var len = sourceLen < targetLen ? sourceLen : targetLen;
+                for (var i = 0; i < len; i++) {
+                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
+                }
+            }
+            function inferFromSignature(source, target) {
+                forEachMatchingParameterType(source, target, inferFromTypes);
+                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
+                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
+                }
+                else {
+                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+                }
+            }
+            function inferFromIndexTypes(source, target) {
+                var targetStringIndexType = getIndexTypeOfType(target, 0);
+                if (targetStringIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 0) ||
+                        getImplicitIndexTypeOfType(source, 0);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetStringIndexType);
+                    }
+                }
+                var targetNumberIndexType = getIndexTypeOfType(target, 1);
+                if (targetNumberIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 1) ||
+                        getIndexTypeOfType(source, 0) ||
+                        getImplicitIndexTypeOfType(source, 1);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetNumberIndexType);
+                    }
+                }
+            }
+        }
+        function typeIdenticalToSomeType(type, types) {
+            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
+                var t = types_7[_i];
+                if (isTypeIdenticalTo(t, type)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
+            var reducedTypes = [];
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (!typeIdenticalToSomeType(t, typesToRemove)) {
+                    reducedTypes.push(t);
+                }
+            }
+            return type.flags & 16384 ? getUnionType(reducedTypes, true) : getIntersectionType(reducedTypes);
+        }
+        function getInferenceCandidates(context, index) {
+            var inferences = context.inferences[index];
+            return inferences.primary || inferences.secondary || emptyArray;
+        }
+        function getInferredType(context, index) {
+            var inferredType = context.inferredTypes[index];
+            var inferenceSucceeded;
+            if (!inferredType) {
+                var inferences = getInferenceCandidates(context, index);
+                if (inferences.length) {
+                    var unionOrSuperType = context.inferUnionTypes ? getUnionType(inferences) : getCommonSupertype(inferences);
+                    inferredType = unionOrSuperType ? getWidenedType(unionOrSuperType) : unknownType;
+                    inferenceSucceeded = !!unionOrSuperType;
+                }
+                else {
+                    inferredType = emptyObjectType;
+                    inferenceSucceeded = true;
+                }
+                context.inferredTypes[index] = inferredType;
+                if (inferenceSucceeded) {
+                    var constraint = getConstraintOfTypeParameter(context.typeParameters[index]);
+                    if (constraint) {
+                        var instantiatedConstraint = instantiateType(constraint, getInferenceMapper(context));
+                        if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
+                            context.inferredTypes[index] = inferredType = instantiatedConstraint;
+                        }
+                    }
+                }
+                else if (context.failedTypeParameterIndex === undefined || context.failedTypeParameterIndex > index) {
+                    context.failedTypeParameterIndex = index;
+                }
+            }
+            return inferredType;
+        }
+        function getInferredTypes(context) {
+            for (var i = 0; i < context.inferredTypes.length; i++) {
+                getInferredType(context, i);
+            }
+            return context.inferredTypes;
+        }
+        function getResolvedSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 | 1048576, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol;
+            }
+            return links.resolvedSymbol;
+        }
+        function isInTypeQuery(node) {
+            while (node) {
+                switch (node.kind) {
+                    case 158:
+                        return true;
+                    case 69:
+                    case 139:
+                        node = node.parent;
+                        continue;
+                    default:
+                        return false;
+                }
+            }
+            ts.Debug.fail("should not get here");
+        }
+        function getFlowCacheKey(node) {
+            if (node.kind === 69) {
+                var symbol = getResolvedSymbol(node);
+                return symbol !== unknownSymbol ? "" + getSymbolId(symbol) : undefined;
+            }
+            if (node.kind === 97) {
+                return "0";
+            }
+            if (node.kind === 172) {
+                var key = getFlowCacheKey(node.expression);
+                return key && key + "." + node.name.text;
+            }
+            return undefined;
+        }
+        function isNullOrUndefinedLiteral(node) {
+            return node.kind === 93 ||
+                node.kind === 69 && getResolvedSymbol(node) === undefinedSymbol;
+        }
+        function getLeftmostIdentifierOrThis(node) {
+            switch (node.kind) {
+                case 69:
+                case 97:
+                    return node;
+                case 172:
+                    return getLeftmostIdentifierOrThis(node.expression);
+            }
+            return undefined;
+        }
+        function isMatchingReference(source, target) {
+            if (source.kind === target.kind) {
+                switch (source.kind) {
+                    case 69:
+                        return getResolvedSymbol(source) === getResolvedSymbol(target);
+                    case 97:
+                        return true;
+                    case 172:
+                        return source.name.text === target.name.text &&
+                            isMatchingReference(source.expression, target.expression);
+                }
+            }
+            return false;
+        }
+        function containsMatchingReference(source, target) {
+            while (source.kind === 172) {
+                source = source.expression;
+                if (isMatchingReference(source, target)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function isOrContainsMatchingReference(source, target) {
+            return isMatchingReference(source, target) || containsMatchingReference(source, target);
+        }
+        function hasMatchingArgument(callExpression, reference) {
+            if (callExpression.arguments) {
+                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
+                    var argument = _a[_i];
+                    if (isOrContainsMatchingReference(reference, argument)) {
+                        return true;
+                    }
+                }
+            }
+            if (callExpression.expression.kind === 172 &&
+                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
+                return true;
+            }
+            return false;
+        }
+        function getFlowNodeId(flow) {
+            if (!flow.id) {
+                flow.id = nextFlowId;
+                nextFlowId++;
+            }
+            return flow.id;
+        }
+        function typeMaybeAssignableTo(source, target) {
+            if (!(source.flags & 16384)) {
+                return isTypeAssignableTo(source, target);
+            }
+            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (isTypeAssignableTo(t, target)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function getAssignmentReducedType(declaredType, assignedType) {
+            if (declaredType !== assignedType && declaredType.flags & 16384) {
+                var reducedTypes = ts.filter(declaredType.types, function (t) { return typeMaybeAssignableTo(assignedType, t); });
+                if (reducedTypes.length) {
+                    return reducedTypes.length === 1 ? reducedTypes[0] : getUnionType(reducedTypes);
+                }
+            }
+            return declaredType;
+        }
+        function getTypeFacts(type) {
+            var flags = type.flags;
+            if (flags & 258) {
+                return strictNullChecks ? 4079361 : 4194049;
+            }
+            if (flags & 132) {
+                return strictNullChecks ? 4079234 : 4193922;
+            }
+            if (flags & 8) {
+                return strictNullChecks ? 4078980 : 4193668;
+            }
+            if (flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return resolved.callSignatures.length || resolved.constructSignatures.length || isTypeSubtypeOf(type, globalFunctionType) ?
+                    strictNullChecks ? 1970144 : 4181984 :
+                    strictNullChecks ? 1972176 : 4184016;
+            }
+            if (flags & (16 | 32)) {
+                return 2457472;
+            }
+            if (flags & 64) {
+                return 2340752;
+            }
+            if (flags & 16777216) {
+                return strictNullChecks ? 1981320 : 4193160;
+            }
+            if (flags & 512) {
+                var constraint = getConstraintOfTypeParameter(type);
+                return constraint ? getTypeFacts(constraint) : 4194303;
+            }
+            if (flags & 32768) {
+                return ts.reduceLeft(type.types, function (flags, type) { return flags |= getTypeFacts(type); }, 0);
+            }
+            return 4194303;
+        }
+        function getTypeWithFacts(type, include) {
+            if (!(type.flags & 16384)) {
+                return getTypeFacts(type) & include ? type : neverType;
+            }
+            var firstType;
+            var types;
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (getTypeFacts(t) & include) {
+                    if (!firstType) {
+                        firstType = t;
+                    }
+                    else {
+                        if (!types) {
+                            types = [firstType];
+                        }
+                        types.push(t);
+                    }
+                }
+            }
+            return firstType ? types ? getUnionType(types, true) : firstType : neverType;
+        }
+        function getTypeWithDefault(type, defaultExpression) {
+            if (defaultExpression) {
+                var defaultType = checkExpression(defaultExpression);
+                return getUnionType([getTypeWithFacts(type, 131072), defaultType]);
+            }
+            return type;
+        }
+        function getTypeOfDestructuredProperty(type, name) {
+            var text = getTextOfPropertyName(name);
+            return getTypeOfPropertyOfType(type, text) ||
+                isNumericLiteralName(text) && getIndexTypeOfType(type, 1) ||
+                getIndexTypeOfType(type, 0) ||
+                unknownType;
+        }
+        function getTypeOfDestructuredArrayElement(type, index) {
+            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
+                checkIteratedTypeOrElementType(type, undefined, false) ||
+                unknownType;
+        }
+        function getTypeOfDestructuredSpreadElement(type) {
+            return createArrayType(checkIteratedTypeOrElementType(type, undefined, false) || unknownType);
+        }
+        function getAssignedTypeOfBinaryExpression(node) {
+            return node.parent.kind === 170 || node.parent.kind === 253 ?
+                getTypeWithDefault(getAssignedType(node), node.right) :
+                checkExpression(node.right);
+        }
+        function getAssignedTypeOfArrayLiteralElement(node, element) {
+            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
+        }
+        function getAssignedTypeOfSpreadElement(node) {
+            return getTypeOfDestructuredSpreadElement(getAssignedType(node.parent));
+        }
+        function getAssignedTypeOfPropertyAssignment(node) {
+            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
+        }
+        function getAssignedTypeOfShorthandPropertyAssignment(node) {
+            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
+        }
+        function getAssignedType(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 207:
+                    return stringType;
+                case 208:
+                    return checkRightHandSideOfForOf(parent.expression) || unknownType;
+                case 187:
+                    return getAssignedTypeOfBinaryExpression(parent);
+                case 181:
+                    return undefinedType;
+                case 170:
+                    return getAssignedTypeOfArrayLiteralElement(parent, node);
+                case 191:
+                    return getAssignedTypeOfSpreadElement(parent);
+                case 253:
+                    return getAssignedTypeOfPropertyAssignment(parent);
+                case 254:
+                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
+            }
+            return unknownType;
+        }
+        function getInitialTypeOfBindingElement(node) {
+            var pattern = node.parent;
+            var parentType = getInitialType(pattern.parent);
+            var type = pattern.kind === 167 ?
+                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
+                !node.dotDotDotToken ?
+                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
+                    getTypeOfDestructuredSpreadElement(parentType);
+            return getTypeWithDefault(type, node.initializer);
+        }
+        function getTypeOfInitializer(node) {
+            var links = getNodeLinks(node);
+            return links.resolvedType || checkExpression(node);
+        }
+        function getInitialTypeOfVariableDeclaration(node) {
+            if (node.initializer) {
+                return getTypeOfInitializer(node.initializer);
+            }
+            if (node.parent.parent.kind === 207) {
+                return stringType;
+            }
+            if (node.parent.parent.kind === 208) {
+                return checkRightHandSideOfForOf(node.parent.parent.expression) || unknownType;
+            }
+            return unknownType;
+        }
+        function getInitialType(node) {
+            return node.kind === 218 ?
+                getInitialTypeOfVariableDeclaration(node) :
+                getInitialTypeOfBindingElement(node);
+        }
+        function getReferenceFromExpression(node) {
+            switch (node.kind) {
+                case 178:
+                    return getReferenceFromExpression(node.expression);
+                case 187:
+                    switch (node.operatorToken.kind) {
+                        case 56:
+                            return getReferenceFromExpression(node.left);
+                        case 24:
+                            return getReferenceFromExpression(node.right);
+                    }
+            }
+            return node;
+        }
+        function getFlowTypeOfReference(reference, declaredType, assumeInitialized, includeOuterFunctions) {
+            var key;
+            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & 16908175)) {
+                return declaredType;
+            }
+            var initialType = assumeInitialized ? declaredType : addTypeKind(declaredType, 32);
+            var visitedFlowStart = visitedFlowCount;
+            var result = getTypeAtFlowNode(reference.flowNode);
+            visitedFlowCount = visitedFlowStart;
+            if (reference.parent.kind === 196 && getTypeWithFacts(result, 524288) === neverType) {
+                return declaredType;
+            }
+            return result;
+            function getTypeAtFlowNode(flow) {
+                while (true) {
+                    if (flow.flags & 256) {
+                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
+                            if (visitedFlowNodes[i] === flow) {
+                                return visitedFlowTypes[i];
+                            }
+                        }
+                    }
+                    var type = void 0;
+                    if (flow.flags & 16) {
+                        type = getTypeAtFlowAssignment(flow);
+                        if (!type) {
+                            flow = flow.antecedent;
+                            continue;
+                        }
+                    }
+                    else if (flow.flags & 96) {
+                        type = getTypeAtFlowCondition(flow);
+                    }
+                    else if (flow.flags & 12) {
+                        if (flow.antecedents.length === 1) {
+                            flow = flow.antecedents[0];
+                            continue;
+                        }
+                        type = flow.flags & 4 ?
+                            getTypeAtFlowBranchLabel(flow) :
+                            getTypeAtFlowLoopLabel(flow);
+                    }
+                    else if (flow.flags & 2) {
+                        var container = flow.container;
+                        if (container && includeOuterFunctions) {
+                            flow = container.flowNode;
+                            continue;
+                        }
+                        type = initialType;
+                    }
+                    else {
+                        type = declaredType;
+                    }
+                    if (flow.flags & 256) {
+                        visitedFlowNodes[visitedFlowCount] = flow;
+                        visitedFlowTypes[visitedFlowCount] = type;
+                        visitedFlowCount++;
+                    }
+                    return type;
+                }
+            }
+            function getTypeAtFlowAssignment(flow) {
+                var node = flow.node;
+                if ((node.kind === 218 || node.kind === 169) &&
+                    reference.kind === 69 &&
+                    getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(reference)) === getSymbolOfNode(node)) {
+                    return declaredType.flags & 16384 ?
+                        getAssignmentReducedType(declaredType, getInitialType(node)) :
+                        declaredType;
+                }
+                if (isMatchingReference(reference, node)) {
+                    return declaredType.flags & 16384 ?
+                        getAssignmentReducedType(declaredType, getAssignedType(node)) :
+                        declaredType;
+                }
+                if (containsMatchingReference(reference, node)) {
+                    return declaredType;
+                }
+                return undefined;
+            }
+            function getTypeAtFlowCondition(flow) {
+                var type = getTypeAtFlowNode(flow.antecedent);
+                if (type !== neverType) {
+                    var assumeTrue = (flow.flags & 32) !== 0;
+                    type = narrowType(type, flow.expression, assumeTrue);
+                    if (type === neverType) {
+                        type = narrowType(declaredType, flow.expression, assumeTrue);
+                    }
+                }
+                return type;
+            }
+            function getTypeAtFlowBranchLabel(flow) {
+                var antecedentTypes = [];
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    var type = getTypeAtFlowNode(antecedent);
+                    if (type === declaredType && declaredType === initialType) {
+                        return type;
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                }
+                return getUnionType(antecedentTypes);
+            }
+            function getTypeAtFlowLoopLabel(flow) {
+                var id = getFlowNodeId(flow);
+                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = {});
+                if (!key) {
+                    key = getFlowCacheKey(reference);
+                }
+                if (cache[key]) {
+                    return cache[key];
+                }
+                for (var i = flowLoopStart; i < flowLoopCount; i++) {
+                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key) {
+                        return getUnionType(flowLoopTypes[i]);
+                    }
+                }
+                var antecedentTypes = [];
+                flowLoopNodes[flowLoopCount] = flow;
+                flowLoopKeys[flowLoopCount] = key;
+                flowLoopTypes[flowLoopCount] = antecedentTypes;
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    flowLoopCount++;
+                    var type = getTypeAtFlowNode(antecedent);
+                    flowLoopCount--;
+                    if (cache[key]) {
+                        return cache[key];
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                    if (type === declaredType) {
+                        break;
+                    }
+                }
+                return cache[key] = getUnionType(antecedentTypes);
+            }
+            function narrowTypeByTruthiness(type, expr, assumeTrue) {
+                return isMatchingReference(reference, expr) ? getTypeWithFacts(type, assumeTrue ? 1048576 : 2097152) : type;
+            }
+            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
+                switch (expr.operatorToken.kind) {
+                    case 56:
+                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
+                    case 30:
+                    case 31:
+                    case 32:
+                    case 33:
+                        if (isNullOrUndefinedLiteral(expr.right)) {
+                            return narrowTypeByNullCheck(type, expr, assumeTrue);
+                        }
+                        if (expr.left.kind === 182 && expr.right.kind === 9) {
+                            return narrowTypeByTypeof(type, expr, assumeTrue);
+                        }
+                        break;
+                    case 91:
+                        return narrowTypeByInstanceof(type, expr, assumeTrue);
+                    case 24:
+                        return narrowType(type, expr.right, assumeTrue);
+                }
+                return type;
+            }
+            function narrowTypeByNullCheck(type, expr, assumeTrue) {
+                var operator = expr.operatorToken.kind;
+                if (operator === 31 || operator === 33) {
+                    assumeTrue = !assumeTrue;
+                }
+                if (!strictNullChecks || !isMatchingReference(reference, getReferenceFromExpression(expr.left))) {
+                    return type;
+                }
+                var doubleEquals = operator === 30 || operator === 31;
+                var facts = doubleEquals ?
+                    assumeTrue ? 65536 : 524288 :
+                    expr.right.kind === 93 ?
+                        assumeTrue ? 32768 : 262144 :
+                        assumeTrue ? 16384 : 131072;
+                return getTypeWithFacts(type, facts);
+            }
+            function narrowTypeByTypeof(type, expr, assumeTrue) {
+                var left = getReferenceFromExpression(expr.left.expression);
+                var right = expr.right;
+                if (!isMatchingReference(reference, left)) {
+                    if (containsMatchingReference(reference, left)) {
+                        return declaredType;
+                    }
+                    return type;
+                }
+                if (expr.operatorToken.kind === 31 ||
+                    expr.operatorToken.kind === 33) {
+                    assumeTrue = !assumeTrue;
+                }
+                if (assumeTrue && !(type.flags & 16384)) {
+                    var targetType = ts.getProperty(typeofTypesByName, right.text);
+                    if (targetType && isTypeSubtypeOf(targetType, type)) {
+                        return targetType;
+                    }
+                }
+                var facts = assumeTrue ?
+                    ts.getProperty(typeofEQFacts, right.text) || 64 :
+                    ts.getProperty(typeofNEFacts, right.text) || 8192;
+                return getTypeWithFacts(type, facts);
+            }
+            function narrowTypeByInstanceof(type, expr, assumeTrue) {
+                var left = getReferenceFromExpression(expr.left);
+                if (!isMatchingReference(reference, left)) {
+                    if (containsMatchingReference(reference, left)) {
+                        return declaredType;
+                    }
+                    return type;
+                }
+                if (isTypeAny(type)) {
+                    return type;
+                }
+                var rightType = checkExpression(expr.right);
+                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
+                    return type;
+                }
+                var targetType;
+                var prototypeProperty = getPropertyOfType(rightType, "prototype");
+                if (prototypeProperty) {
+                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
+                    if (!isTypeAny(prototypePropertyType)) {
+                        targetType = prototypePropertyType;
+                    }
+                }
+                if (!targetType) {
+                    var constructSignatures = void 0;
+                    if (rightType.flags & 2048) {
+                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
+                    }
+                    else if (rightType.flags & 65536) {
+                        constructSignatures = getSignaturesOfType(rightType, 1);
+                    }
+                    if (constructSignatures && constructSignatures.length) {
+                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
+                    }
+                }
+                if (targetType) {
+                    return getNarrowedType(type, targetType, assumeTrue);
+                }
+                return type;
+            }
+            function getNarrowedType(type, candidate, assumeTrue) {
+                if (!assumeTrue) {
+                    return type.flags & 16384 ?
+                        getUnionType(ts.filter(type.types, function (t) { return !isTypeSubtypeOf(t, candidate); })) :
+                        type;
+                }
+                if (type.flags & 16384) {
+                    var assignableConstituents = ts.filter(type.types, function (t) { return isTypeAssignableTo(t, candidate); });
+                    if (assignableConstituents.length) {
+                        return getUnionType(assignableConstituents);
+                    }
+                }
+                var targetType = type.flags & 512 ? getApparentType(type) : type;
+                return isTypeAssignableTo(candidate, targetType) ? candidate :
+                    isTypeAssignableTo(type, candidate) ? type :
+                        getIntersectionType([type, candidate]);
+            }
+            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
+                if (type.flags & 1 || !hasMatchingArgument(callExpression, reference)) {
+                    return type;
+                }
+                var signature = getResolvedSignature(callExpression);
+                var predicate = signature.typePredicate;
+                if (!predicate) {
+                    return type;
+                }
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    var predicateArgument = callExpression.arguments[predicate.parameterIndex];
+                    if (predicateArgument) {
+                        if (isMatchingReference(reference, predicateArgument)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue);
+                        }
+                        if (containsMatchingReference(reference, predicateArgument)) {
+                            return declaredType;
+                        }
+                    }
+                }
+                else {
+                    var invokedExpression = skipParenthesizedNodes(callExpression.expression);
+                    if (invokedExpression.kind === 173 || invokedExpression.kind === 172) {
+                        var accessExpression = invokedExpression;
+                        var possibleReference = skipParenthesizedNodes(accessExpression.expression);
+                        if (isMatchingReference(reference, possibleReference)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue);
+                        }
+                        if (containsMatchingReference(reference, possibleReference)) {
+                            return declaredType;
+                        }
+                    }
+                }
+                return type;
+            }
+            function narrowType(type, expr, assumeTrue) {
+                switch (expr.kind) {
+                    case 69:
+                    case 97:
+                    case 172:
+                        return narrowTypeByTruthiness(type, expr, assumeTrue);
+                    case 174:
+                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
+                    case 178:
+                        return narrowType(type, expr.expression, assumeTrue);
+                    case 187:
+                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
+                    case 185:
+                        if (expr.operator === 49) {
+                            return narrowType(type, expr.operand, !assumeTrue);
+                        }
+                        break;
+                }
+                return type;
+            }
+        }
+        function getTypeOfSymbolAtLocation(symbol, location) {
+            if (location.kind === 69) {
+                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
+                    location = location.parent;
+                }
+                if (ts.isExpression(location) && !ts.isAssignmentTarget(location)) {
+                    var type = checkExpression(location);
+                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
+                        return type;
+                    }
+                }
+            }
+            return getTypeOfSymbol(symbol);
+        }
+        function skipParenthesizedNodes(expression) {
+            while (expression.kind === 178) {
+                expression = expression.expression;
+            }
+            return expression;
+        }
+        function getControlFlowContainer(node) {
+            while (true) {
+                node = node.parent;
+                if (ts.isFunctionLike(node) || node.kind === 226 || node.kind === 256 || node.kind === 145) {
+                    return node;
+                }
+            }
+        }
+        function isDeclarationIncludedInFlow(reference, declaration, includeOuterFunctions) {
+            var declarationContainer = getControlFlowContainer(declaration);
+            var container = getControlFlowContainer(reference);
+            while (container !== declarationContainer &&
+                (container.kind === 179 || container.kind === 180) &&
+                (includeOuterFunctions || ts.getImmediatelyInvokedFunctionExpression(container))) {
+                container = getControlFlowContainer(container);
+            }
+            return container === declarationContainer;
+        }
+        function checkIdentifier(node) {
+            var symbol = getResolvedSymbol(node);
+            if (symbol === argumentsSymbol) {
+                var container = ts.getContainingFunction(node);
+                if (container.kind === 180) {
+                    if (languageVersion < 2) {
+                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
+                    }
+                }
+                if (node.flags & 33554432) {
+                    getNodeLinks(container).flags |= 8192;
+                }
+            }
+            if (symbol.flags & 8388608 && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
+                markAliasSymbolAsReferenced(symbol);
+            }
+            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
+            if (languageVersion === 2
+                && localOrExportSymbol.flags & 32
+                && localOrExportSymbol.valueDeclaration.kind === 221
+                && ts.nodeIsDecorated(localOrExportSymbol.valueDeclaration)) {
+                var container = ts.getContainingClass(node);
+                while (container !== undefined) {
+                    if (container === localOrExportSymbol.valueDeclaration && container.name !== node) {
+                        getNodeLinks(container).flags |= 524288;
+                        getNodeLinks(node).flags |= 1048576;
+                        break;
+                    }
+                    container = ts.getContainingClass(container);
+                }
+            }
+            checkCollisionWithCapturedSuperVariable(node, node);
+            checkCollisionWithCapturedThisVariable(node, node);
+            checkNestedBlockScopedBinding(node, symbol);
+            var type = getTypeOfSymbol(localOrExportSymbol);
+            if (!(localOrExportSymbol.flags & 3) || ts.isAssignmentTarget(node)) {
+                return type;
+            }
+            var declaration = localOrExportSymbol.valueDeclaration;
+            var includeOuterFunctions = isReadonlySymbol(localOrExportSymbol);
+            var assumeInitialized = !strictNullChecks || (type.flags & 1) !== 0 || !declaration ||
+                ts.getRootDeclaration(declaration).kind === 142 || ts.isInAmbientContext(declaration) ||
+                !isDeclarationIncludedInFlow(node, declaration, includeOuterFunctions);
+            var flowType = getFlowTypeOfReference(node, type, assumeInitialized, includeOuterFunctions);
+            if (!assumeInitialized && !(getCombinedTypeFlags(type) & 32) && getCombinedTypeFlags(flowType) & 32) {
+                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
+                return type;
+            }
+            return flowType;
+        }
+        function isInsideFunction(node, threshold) {
+            var current = node;
+            while (current && current !== threshold) {
+                if (ts.isFunctionLike(current)) {
+                    return true;
+                }
+                current = current.parent;
+            }
+            return false;
+        }
+        function checkNestedBlockScopedBinding(node, symbol) {
+            if (languageVersion >= 2 ||
+                (symbol.flags & (2 | 32)) === 0 ||
+                symbol.valueDeclaration.parent.kind === 252) {
+                return;
+            }
+            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+            var usedInFunction = isInsideFunction(node.parent, container);
+            var current = container;
+            var containedInIterationStatement = false;
+            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
+                if (ts.isIterationStatement(current, false)) {
+                    containedInIterationStatement = true;
+                    break;
+                }
+                current = current.parent;
+            }
+            if (containedInIterationStatement) {
+                if (usedInFunction) {
+                    getNodeLinks(current).flags |= 65536;
+                }
+                if (container.kind === 206 &&
+                    ts.getAncestor(symbol.valueDeclaration, 219).parent === container &&
+                    isAssignedInBodyOfForStatement(node, container)) {
+                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152;
+                }
+                getNodeLinks(symbol.valueDeclaration).flags |= 262144;
+            }
+            if (usedInFunction) {
+                getNodeLinks(symbol.valueDeclaration).flags |= 131072;
+            }
+        }
+        function isAssignedInBodyOfForStatement(node, container) {
+            var current = node;
+            while (current.parent.kind === 178) {
+                current = current.parent;
+            }
+            var isAssigned = false;
+            if (ts.isAssignmentTarget(current)) {
+                isAssigned = true;
+            }
+            else if ((current.parent.kind === 185 || current.parent.kind === 186)) {
+                var expr = current.parent;
+                isAssigned = expr.operator === 41 || expr.operator === 42;
+            }
+            if (!isAssigned) {
+                return false;
+            }
+            while (current !== container) {
+                if (current === container.statement) {
+                    return true;
+                }
+                else {
+                    current = current.parent;
+                }
+            }
+            return false;
+        }
+        function captureLexicalThis(node, container) {
+            getNodeLinks(node).flags |= 2;
+            if (container.kind === 145 || container.kind === 148) {
+                var classNode = container.parent;
+                getNodeLinks(classNode).flags |= 4;
+            }
+            else {
+                getNodeLinks(container).flags |= 4;
+            }
+        }
+        function findFirstSuperCall(n) {
+            if (ts.isSuperCallExpression(n)) {
+                return n;
+            }
+            else if (ts.isFunctionLike(n)) {
+                return undefined;
+            }
+            return ts.forEachChild(n, findFirstSuperCall);
+        }
+        function getSuperCallInConstructor(constructor) {
+            var links = getNodeLinks(constructor);
+            if (links.hasSuperCall === undefined) {
+                links.superCall = findFirstSuperCall(constructor.body);
+                links.hasSuperCall = links.superCall ? true : false;
+            }
+            return links.superCall;
+        }
+        function classDeclarationExtendsNull(classDecl) {
+            var classSymbol = getSymbolOfNode(classDecl);
+            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
+            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
+            return baseConstructorType === nullWideningType;
+        }
+        function checkThisExpression(node) {
+            var container = ts.getThisContainer(node, true);
+            var needToCaptureLexicalThis = false;
+            if (container.kind === 148) {
+                var containingClassDecl = container.parent;
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
+                if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
+                    var superCall = getSuperCallInConstructor(container);
+                    if (!superCall || superCall.end > node.pos) {
+                        error(node, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
+                    }
+                }
+            }
+            if (container.kind === 180) {
+                container = ts.getThisContainer(container, false);
+                needToCaptureLexicalThis = (languageVersion < 2);
+            }
+            switch (container.kind) {
+                case 225:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
+                    break;
+                case 224:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                    break;
+                case 148:
+                    if (isInConstructorArgumentInitializer(node, container)) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
+                    }
+                    break;
+                case 145:
+                case 144:
+                    if (container.flags & 32) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
+                    }
+                    break;
+                case 140:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
+                    break;
+            }
+            if (needToCaptureLexicalThis) {
+                captureLexicalThis(node, container);
+            }
+            if (ts.isFunctionLike(container) &&
+                (!isInParameterInitializerBeforeContainingFunction(node) || getFunctionLikeThisParameter(container))) {
+                if (container.kind === 179 &&
+                    ts.isInJavaScriptFile(container.parent) &&
+                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3) {
+                    var className = container.parent
+                        .left
+                        .expression
+                        .expression;
+                    var classSymbol = checkExpression(className).symbol;
+                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16)) {
+                        return getInferredClassType(classSymbol);
+                    }
+                }
+                var type = getContextuallyTypedThisType(container);
+                if (type) {
+                    return type;
+                }
+                var signature = getSignatureFromDeclaration(container);
+                if (signature.thisType) {
+                    return signature.thisType;
+                }
+            }
+            if (ts.isClassLike(container.parent)) {
+                var symbol = getSymbolOfNode(container.parent);
+                var type = container.flags & 32 ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
+                return getFlowTypeOfReference(node, type, true, true);
+            }
+            if (ts.isInJavaScriptFile(node)) {
+                var type = getTypeForThisExpressionFromJSDoc(container);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            if (compilerOptions.noImplicitThis) {
+                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
+            }
+            return anyType;
+        }
+        function getTypeForThisExpressionFromJSDoc(node) {
+            var typeTag = ts.getJSDocTypeTag(node);
+            if (typeTag && typeTag.typeExpression && typeTag.typeExpression.type && typeTag.typeExpression.type.kind === 269) {
+                var jsDocFunctionType = typeTag.typeExpression.type;
+                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 272) {
+                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
+                }
+            }
+        }
+        function isInConstructorArgumentInitializer(node, constructorDecl) {
+            for (var n = node; n && n !== constructorDecl; n = n.parent) {
+                if (n.kind === 142) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkSuperExpression(node) {
+            var isCallExpression = node.parent.kind === 174 && node.parent.expression === node;
+            var container = ts.getSuperContainer(node, true);
+            var needToCaptureLexicalThis = false;
+            if (!isCallExpression) {
+                while (container && container.kind === 180) {
+                    container = ts.getSuperContainer(container, true);
+                    needToCaptureLexicalThis = languageVersion < 2;
+                }
+            }
+            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
+            var nodeCheckFlag = 0;
+            if (!canUseSuperExpression) {
+                var current = node;
+                while (current && current !== container && current.kind !== 140) {
+                    current = current.parent;
+                }
+                if (current && current.kind === 140) {
+                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
+                }
+                else if (isCallExpression) {
+                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
+                }
+                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 171)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
+                }
+                else {
+                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
+                }
+                return unknownType;
+            }
+            if ((container.flags & 32) || isCallExpression) {
+                nodeCheckFlag = 512;
+            }
+            else {
+                nodeCheckFlag = 256;
+            }
+            getNodeLinks(node).flags |= nodeCheckFlag;
+            if (container.kind === 147 && container.flags & 256) {
+                if (ts.isSuperPropertyOrElementAccess(node.parent) && ts.isAssignmentTarget(node.parent)) {
+                    getNodeLinks(container).flags |= 4096;
+                }
+                else {
+                    getNodeLinks(container).flags |= 2048;
+                }
+            }
+            if (needToCaptureLexicalThis) {
+                captureLexicalThis(node.parent, container);
+            }
+            if (container.parent.kind === 171) {
+                if (languageVersion < 2) {
+                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
+                    return unknownType;
+                }
+                else {
+                    return anyType;
+                }
+            }
+            var classLikeDeclaration = container.parent;
+            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
+            var baseClassType = classType && getBaseTypes(classType)[0];
+            if (!baseClassType) {
+                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
+                }
+                return unknownType;
+            }
+            if (container.kind === 148 && isInConstructorArgumentInitializer(node, container)) {
+                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
+                return unknownType;
+            }
+            return nodeCheckFlag === 512
+                ? getBaseConstructorTypeOfClass(classType)
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
+            function isLegalUsageOfSuperExpression(container) {
+                if (!container) {
+                    return false;
+                }
+                if (isCallExpression) {
+                    return container.kind === 148;
+                }
+                else {
+                    if (ts.isClassLike(container.parent) || container.parent.kind === 171) {
+                        if (container.flags & 32) {
+                            return container.kind === 147 ||
+                                container.kind === 146 ||
+                                container.kind === 149 ||
+                                container.kind === 150;
+                        }
+                        else {
+                            return container.kind === 147 ||
+                                container.kind === 146 ||
+                                container.kind === 149 ||
+                                container.kind === 150 ||
+                                container.kind === 145 ||
+                                container.kind === 144 ||
+                                container.kind === 148;
+                        }
+                    }
+                }
+                return false;
+            }
+        }
+        function getContextuallyTypedThisType(func) {
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func) && func.kind !== 180) {
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    return contextualSignature.thisType;
+                }
+            }
+            return undefined;
+        }
+        function getContextuallyTypedParameterType(parameter) {
+            var func = parameter.parent;
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
+                var iife = ts.getImmediatelyInvokedFunctionExpression(func);
+                if (iife) {
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
+                        if (parameter.dotDotDotToken) {
+                            var restTypes = [];
+                            for (var i = indexOfParameter; i < iife.arguments.length; i++) {
+                                restTypes.push(getTypeOfExpression(iife.arguments[i]));
+                            }
+                            return createArrayType(getUnionType(restTypes));
+                        }
+                        var links = getNodeLinks(iife);
+                        var cached = links.resolvedSignature;
+                        links.resolvedSignature = anySignature;
+                        var type = checkExpression(iife.arguments[indexOfParameter]);
+                        links.resolvedSignature = cached;
+                        return type;
+                    }
+                }
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    var funcHasRestParameters = ts.hasRestParameter(func);
+                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (indexOfParameter < len) {
+                        return getTypeAtPosition(contextualSignature, indexOfParameter);
+                    }
+                    if (funcHasRestParameters &&
+                        indexOfParameter === (func.parameters.length - 1) &&
+                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
+                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
+                    }
+                }
+            }
+            return undefined;
+        }
+        function getContextualTypeForInitializerExpression(node) {
+            var declaration = node.parent;
+            if (node === declaration.initializer) {
+                if (declaration.type) {
+                    return getTypeFromTypeNode(declaration.type);
+                }
+                if (declaration.kind === 142) {
+                    var type = getContextuallyTypedParameterType(declaration);
+                    if (type) {
+                        return type;
+                    }
+                }
+                if (ts.isBindingPattern(declaration.name)) {
+                    return getTypeFromBindingPattern(declaration.name, true);
+                }
+                if (ts.isBindingPattern(declaration.parent)) {
+                    var parentDeclaration = declaration.parent.parent;
+                    var name_12 = declaration.propertyName || declaration.name;
+                    if (ts.isVariableLike(parentDeclaration) &&
+                        parentDeclaration.type &&
+                        !ts.isBindingPattern(name_12)) {
+                        var text = getTextOfPropertyName(name_12);
+                        if (text) {
+                            return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text);
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function getContextualTypeForReturnExpression(node) {
+            var func = ts.getContainingFunction(node);
+            if (ts.isAsyncFunctionLike(func)) {
+                var contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return getPromisedType(contextualReturnType);
+                }
+                return undefined;
+            }
+            if (func && !func.asteriskToken) {
+                return getContextualReturnType(func);
+            }
+            return undefined;
+        }
+        function getContextualTypeForYieldOperand(node) {
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return node.asteriskToken
+                        ? contextualReturnType
+                        : getElementTypeOfIterableIterator(contextualReturnType);
+                }
+            }
+            return undefined;
+        }
+        function isInParameterInitializerBeforeContainingFunction(node) {
+            while (node.parent && !ts.isFunctionLike(node.parent)) {
+                if (node.parent.kind === 142 && node.parent.initializer === node) {
+                    return true;
+                }
+                node = node.parent;
+            }
+            return false;
+        }
+        function getContextualReturnType(functionDecl) {
+            if (functionDecl.type ||
+                functionDecl.kind === 148 ||
+                functionDecl.kind === 149 && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(functionDecl.symbol, 150))) {
+                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
+            }
+            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
+            if (signature) {
+                return getReturnTypeOfSignature(signature);
+            }
+            return undefined;
+        }
+        function getContextualTypeForArgument(callTarget, arg) {
+            var args = getEffectiveCallArguments(callTarget);
+            var argIndex = ts.indexOf(args, arg);
+            if (argIndex >= 0) {
+                var signature = getResolvedOrAnySignature(callTarget);
+                return getTypeAtPosition(signature, argIndex);
+            }
+            return undefined;
+        }
+        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
+            if (template.parent.kind === 176) {
+                return getContextualTypeForArgument(template.parent, substitutionExpression);
+            }
+            return undefined;
+        }
+        function getContextualTypeForBinaryOperand(node) {
+            var binaryExpression = node.parent;
+            var operator = binaryExpression.operatorToken.kind;
+            if (operator >= 56 && operator <= 68) {
+                if (node === binaryExpression.right) {
+                    return checkExpression(binaryExpression.left);
+                }
+            }
+            else if (operator === 52) {
+                var type = getContextualType(binaryExpression);
+                if (!type && node === binaryExpression.right) {
+                    type = checkExpression(binaryExpression.left);
+                }
+                return type;
+            }
+            else if (operator === 51 || operator === 24) {
+                if (node === binaryExpression.right) {
+                    return getContextualType(binaryExpression);
+                }
+            }
+            return undefined;
+        }
+        function applyToContextualType(type, mapper) {
+            if (!(type.flags & 16384)) {
+                return mapper(type);
+            }
+            var types = type.types;
+            var mappedType;
+            var mappedTypes;
+            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
+                var current = types_8[_i];
+                var t = mapper(current);
+                if (t) {
+                    if (!mappedType) {
+                        mappedType = t;
+                    }
+                    else if (!mappedTypes) {
+                        mappedTypes = [mappedType, t];
+                    }
+                    else {
+                        mappedTypes.push(t);
+                    }
+                }
+            }
+            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
+        }
+        function getTypeOfPropertyOfContextualType(type, name) {
+            return applyToContextualType(type, function (t) {
+                var prop = t.flags & 130048 ? getPropertyOfType(t, name) : undefined;
+                return prop ? getTypeOfSymbol(prop) : undefined;
+            });
+        }
+        function getIndexTypeOfContextualType(type, kind) {
+            return applyToContextualType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
+        }
+        function contextualTypeIsStringLiteralType(type) {
+            return !!(type.flags & 16384 ? ts.forEach(type.types, isStringLiteralType) : isStringLiteralType(type));
+        }
+        function contextualTypeIsTupleLikeType(type) {
+            return !!(type.flags & 16384 ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
+        }
+        function getContextualTypeForObjectLiteralMethod(node) {
+            ts.Debug.assert(ts.isObjectLiteralMethod(node));
+            if (isInsideWithStatementBody(node)) {
+                return undefined;
+            }
+            return getContextualTypeForObjectLiteralElement(node);
+        }
+        function getContextualTypeForObjectLiteralElement(element) {
+            var objectLiteral = element.parent;
+            var type = getApparentTypeOfContextualType(objectLiteral);
+            if (type) {
+                if (!ts.hasDynamicName(element)) {
+                    var symbolName = getSymbolOfNode(element).name;
+                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
+                    if (propertyType) {
+                        return propertyType;
+                    }
+                }
+                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1) ||
+                    getIndexTypeOfContextualType(type, 0);
+            }
+            return undefined;
+        }
+        function getContextualTypeForElementExpression(node) {
+            var arrayLiteral = node.parent;
+            var type = getApparentTypeOfContextualType(arrayLiteral);
+            if (type) {
+                var index = ts.indexOf(arrayLiteral.elements, node);
+                return getTypeOfPropertyOfContextualType(type, "" + index)
+                    || getIndexTypeOfContextualType(type, 1)
+                    || (languageVersion >= 2 ? getElementTypeOfIterable(type, undefined) : undefined);
+            }
+            return undefined;
+        }
+        function getContextualTypeForConditionalOperand(node) {
+            var conditional = node.parent;
+            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
+        }
+        function getContextualTypeForJsxAttribute(attribute) {
+            var kind = attribute.kind;
+            var jsxElement = attribute.parent;
+            var attrsType = getJsxElementAttributesType(jsxElement);
+            if (attribute.kind === 246) {
+                if (!attrsType || isTypeAny(attrsType)) {
+                    return undefined;
+                }
+                return getTypeOfPropertyOfType(attrsType, attribute.name.text);
+            }
+            else if (attribute.kind === 247) {
+                return attrsType;
+            }
+            ts.Debug.fail("Expected JsxAttribute or JsxSpreadAttribute, got ts.SyntaxKind[" + kind + "]");
+        }
+        function getApparentTypeOfContextualType(node) {
+            var type = getContextualType(node);
+            return type && getApparentType(type);
+        }
+        function getContextualType(node) {
+            if (isInsideWithStatementBody(node)) {
+                return undefined;
+            }
+            if (node.contextualType) {
+                return node.contextualType;
+            }
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 218:
+                case 142:
+                case 145:
+                case 144:
+                case 169:
+                    return getContextualTypeForInitializerExpression(node);
+                case 180:
+                case 211:
+                    return getContextualTypeForReturnExpression(node);
+                case 190:
+                    return getContextualTypeForYieldOperand(parent);
+                case 174:
+                case 175:
+                    return getContextualTypeForArgument(parent, node);
+                case 177:
+                case 195:
+                    return getTypeFromTypeNode(parent.type);
+                case 187:
+                    return getContextualTypeForBinaryOperand(node);
+                case 253:
+                    return getContextualTypeForObjectLiteralElement(parent);
+                case 170:
+                    return getContextualTypeForElementExpression(node);
+                case 188:
+                    return getContextualTypeForConditionalOperand(node);
+                case 197:
+                    ts.Debug.assert(parent.parent.kind === 189);
+                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
+                case 178:
+                    return getContextualType(parent);
+                case 248:
+                    return getContextualType(parent);
+                case 246:
+                case 247:
+                    return getContextualTypeForJsxAttribute(parent);
+            }
+            return undefined;
+        }
+        function getNonGenericSignature(type) {
+            var signatures = getSignaturesOfStructuredType(type, 0);
+            if (signatures.length === 1) {
+                var signature = signatures[0];
+                if (!signature.typeParameters) {
+                    return signature;
+                }
+            }
+        }
+        function isFunctionExpressionOrArrowFunction(node) {
+            return node.kind === 179 || node.kind === 180;
+        }
+        function getContextualSignatureForFunctionLikeDeclaration(node) {
+            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
+                ? getContextualSignature(node)
+                : undefined;
+        }
+        function getContextualTypeForFunctionLikeDeclaration(node) {
+            return ts.isObjectLiteralMethod(node) ?
+                getContextualTypeForObjectLiteralMethod(node) :
+                getApparentTypeOfContextualType(node);
+        }
+        function getContextualSignature(node) {
+            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
+            var type = getContextualTypeForFunctionLikeDeclaration(node);
+            if (!type) {
+                return undefined;
+            }
+            if (!(type.flags & 16384)) {
+                return getNonGenericSignature(type);
+            }
+            var signatureList;
+            var types = type.types;
+            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
+                var current = types_9[_i];
+                var signature = getNonGenericSignature(current);
+                if (signature) {
+                    if (!signatureList) {
+                        signatureList = [signature];
+                    }
+                    else if (!compareSignaturesIdentical(signatureList[0], signature, false, true, true, compareTypesIdentical)) {
+                        return undefined;
+                    }
+                    else {
+                        signatureList.push(signature);
+                    }
+                }
+            }
+            var result;
+            if (signatureList) {
+                result = cloneSignature(signatureList[0]);
+                result.resolvedReturnType = undefined;
+                result.unionSignatures = signatureList;
+            }
+            return result;
+        }
+        function isInferentialContext(mapper) {
+            return mapper && mapper.context;
+        }
+        function checkSpreadElementExpression(node, contextualMapper) {
+            var arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
+            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, false);
+        }
+        function hasDefaultValue(node) {
+            return (node.kind === 169 && !!node.initializer) ||
+                (node.kind === 187 && node.operatorToken.kind === 56);
+        }
+        function checkArrayLiteral(node, contextualMapper) {
+            var elements = node.elements;
+            var hasSpreadElement = false;
+            var elementTypes = [];
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
+                var e = elements_1[_i];
+                if (inDestructuringPattern && e.kind === 191) {
+                    var restArrayType = checkExpression(e.expression, contextualMapper);
+                    var restElementType = getIndexTypeOfType(restArrayType, 1) ||
+                        (languageVersion >= 2 ? getElementTypeOfIterable(restArrayType, undefined) : undefined);
+                    if (restElementType) {
+                        elementTypes.push(restElementType);
+                    }
+                }
+                else {
+                    var type = checkExpression(e, contextualMapper);
+                    elementTypes.push(type);
+                }
+                hasSpreadElement = hasSpreadElement || e.kind === 191;
+            }
+            if (!hasSpreadElement) {
+                if (inDestructuringPattern && elementTypes.length) {
+                    var type = createNewTupleType(elementTypes);
+                    type.pattern = node;
+                    return type;
+                }
+                var contextualType = getApparentTypeOfContextualType(node);
+                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
+                    var pattern = contextualType.pattern;
+                    if (pattern && (pattern.kind === 168 || pattern.kind === 170)) {
+                        var patternElements = pattern.elements;
+                        for (var i = elementTypes.length; i < patternElements.length; i++) {
+                            var patternElement = patternElements[i];
+                            if (hasDefaultValue(patternElement)) {
+                                elementTypes.push(contextualType.elementTypes[i]);
+                            }
+                            else {
+                                if (patternElement.kind !== 193) {
+                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                                }
+                                elementTypes.push(unknownType);
+                            }
+                        }
+                    }
+                    if (elementTypes.length) {
+                        return createTupleType(elementTypes);
+                    }
+                }
+            }
+            return createArrayType(elementTypes.length ? getUnionType(elementTypes) : strictNullChecks ? neverType : undefinedWideningType);
+        }
+        function isNumericName(name) {
+            return name.kind === 140 ? isNumericComputedName(name) : isNumericLiteralName(name.text);
+        }
+        function isNumericComputedName(name) {
+            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 132);
+        }
+        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
+            return isTypeAny(type) || isTypeOfKind(type, kind);
+        }
+        function isNumericLiteralName(name) {
+            return (+name).toString() === name;
+        }
+        function checkComputedPropertyName(node) {
+            var links = getNodeLinks(node.expression);
+            if (!links.resolvedType) {
+                links.resolvedType = checkExpression(node.expression);
+                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 132 | 258 | 16777216)) {
+                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
+                }
+                else {
+                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, true);
+                }
+            }
+            return links.resolvedType;
+        }
+        function getObjectLiteralIndexInfo(node, properties, kind) {
+            var propTypes = [];
+            for (var i = 0; i < properties.length; i++) {
+                if (kind === 0 || isNumericName(node.properties[i].name)) {
+                    propTypes.push(getTypeOfSymbol(properties[i]));
+                }
+            }
+            var unionType = propTypes.length ? getUnionType(propTypes) : undefinedType;
+            return createIndexInfo(unionType, false);
+        }
+        function checkObjectLiteral(node, contextualMapper) {
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
+            var propertiesTable = {};
+            var propertiesArray = [];
+            var contextualType = getApparentTypeOfContextualType(node);
+            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
+                (contextualType.pattern.kind === 167 || contextualType.pattern.kind === 171);
+            var typeFlags = 0;
+            var patternWithComputedProperties = false;
+            var hasComputedStringProperty = false;
+            var hasComputedNumberProperty = false;
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var memberDecl = _a[_i];
+                var member = memberDecl.symbol;
+                if (memberDecl.kind === 253 ||
+                    memberDecl.kind === 254 ||
+                    ts.isObjectLiteralMethod(memberDecl)) {
+                    var type = void 0;
+                    if (memberDecl.kind === 253) {
+                        type = checkPropertyAssignment(memberDecl, contextualMapper);
+                    }
+                    else if (memberDecl.kind === 147) {
+                        type = checkObjectLiteralMethod(memberDecl, contextualMapper);
+                    }
+                    else {
+                        ts.Debug.assert(memberDecl.kind === 254);
+                        type = checkExpression(memberDecl.name, contextualMapper);
+                    }
+                    typeFlags |= type.flags;
+                    var prop = createSymbol(4 | 67108864 | member.flags, member.name);
+                    if (inDestructuringPattern) {
+                        var isOptional = (memberDecl.kind === 253 && hasDefaultValue(memberDecl.initializer)) ||
+                            (memberDecl.kind === 254 && memberDecl.objectAssignmentInitializer);
+                        if (isOptional) {
+                            prop.flags |= 536870912;
+                        }
+                        if (ts.hasDynamicName(memberDecl)) {
+                            patternWithComputedProperties = true;
+                        }
+                    }
+                    else if (contextualTypeHasPattern && !(contextualType.flags & 67108864)) {
+                        var impliedProp = getPropertyOfType(contextualType, member.name);
+                        if (impliedProp) {
+                            prop.flags |= impliedProp.flags & 536870912;
+                        }
+                        else if (!compilerOptions.suppressExcessPropertyErrors) {
+                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
+                        }
+                    }
+                    prop.declarations = member.declarations;
+                    prop.parent = member.parent;
+                    if (member.valueDeclaration) {
+                        prop.valueDeclaration = member.valueDeclaration;
+                    }
+                    prop.type = type;
+                    prop.target = member;
+                    member = prop;
+                }
+                else {
+                    ts.Debug.assert(memberDecl.kind === 149 || memberDecl.kind === 150);
+                    checkAccessorDeclaration(memberDecl);
+                }
+                if (ts.hasDynamicName(memberDecl)) {
+                    if (isNumericName(memberDecl.name)) {
+                        hasComputedNumberProperty = true;
+                    }
+                    else {
+                        hasComputedStringProperty = true;
+                    }
+                }
+                else {
+                    propertiesTable[member.name] = member;
+                }
+                propertiesArray.push(member);
+            }
+            if (contextualTypeHasPattern) {
+                for (var _b = 0, _c = getPropertiesOfType(contextualType); _b < _c.length; _b++) {
+                    var prop = _c[_b];
+                    if (!ts.hasProperty(propertiesTable, prop.name)) {
+                        if (!(prop.flags & 536870912)) {
+                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                        }
+                        propertiesTable[prop.name] = prop;
+                        propertiesArray.push(prop);
+                    }
+                }
+            }
+            var stringIndexInfo = hasComputedStringProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 0) : undefined;
+            var numberIndexInfo = hasComputedNumberProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 1) : undefined;
+            var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
+            var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576;
+            result.flags |= 524288 | 4194304 | freshObjectLiteralFlag | (typeFlags & 14680064) | (patternWithComputedProperties ? 67108864 : 0);
+            if (inDestructuringPattern) {
+                result.pattern = node;
+            }
+            return result;
+        }
+        function checkJsxSelfClosingElement(node) {
+            checkJsxOpeningLikeElement(node);
+            return jsxElementType || anyType;
+        }
+        function checkJsxElement(node) {
+            checkJsxOpeningLikeElement(node.openingElement);
+            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
+                getIntrinsicTagSymbol(node.closingElement);
+            }
+            else {
+                checkExpression(node.closingElement.tagName);
+            }
+            for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
+                var child = _a[_i];
+                switch (child.kind) {
+                    case 248:
+                        checkJsxExpression(child);
+                        break;
+                    case 241:
+                        checkJsxElement(child);
+                        break;
+                    case 242:
+                        checkJsxSelfClosingElement(child);
+                        break;
+                }
+            }
+            return jsxElementType || anyType;
+        }
+        function isUnhyphenatedJsxName(name) {
+            return name.indexOf("-") < 0;
+        }
+        function isJsxIntrinsicIdentifier(tagName) {
+            if (tagName.kind === 139) {
+                return false;
+            }
+            else {
+                return ts.isIntrinsicJsxName(tagName.text);
+            }
+        }
+        function checkJsxAttribute(node, elementAttributesType, nameTable) {
+            var correspondingPropType = undefined;
+            if (elementAttributesType === emptyObjectType && isUnhyphenatedJsxName(node.name.text)) {
+                error(node.parent, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
+            }
+            else if (elementAttributesType && !isTypeAny(elementAttributesType)) {
+                var correspondingPropSymbol = getPropertyOfType(elementAttributesType, node.name.text);
+                correspondingPropType = correspondingPropSymbol && getTypeOfSymbol(correspondingPropSymbol);
+                if (isUnhyphenatedJsxName(node.name.text)) {
+                    var indexerType = getIndexTypeOfType(elementAttributesType, 0);
+                    if (indexerType) {
+                        correspondingPropType = indexerType;
+                    }
+                    else {
+                        if (!correspondingPropType) {
+                            error(node.name, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.name.text, typeToString(elementAttributesType));
+                            return unknownType;
+                        }
+                    }
+                }
+            }
+            var exprType;
+            if (node.initializer) {
+                exprType = checkExpression(node.initializer);
+            }
+            else {
+                exprType = booleanType;
+            }
+            if (correspondingPropType) {
+                checkTypeAssignableTo(exprType, correspondingPropType, node);
+            }
+            nameTable[node.name.text] = true;
+            return exprType;
+        }
+        function checkJsxSpreadAttribute(node, elementAttributesType, nameTable) {
+            var type = checkExpression(node.expression);
+            var props = getPropertiesOfType(type);
+            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
+                var prop = props_2[_i];
+                if (!nameTable[prop.name]) {
+                    var targetPropSym = getPropertyOfType(elementAttributesType, prop.name);
+                    if (targetPropSym) {
+                        var msg = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property, prop.name);
+                        checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(targetPropSym), node, undefined, msg);
+                    }
+                    nameTable[prop.name] = true;
+                }
+            }
+            return type;
+        }
+        function getJsxType(name) {
+            if (jsxTypes[name] === undefined) {
+                return jsxTypes[name] = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType;
+            }
+            return jsxTypes[name];
+        }
+        function getIntrinsicTagSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
+                if (intrinsicElementsType !== unknownType) {
+                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
+                    if (intrinsicProp) {
+                        links.jsxFlags |= 1;
+                        return links.resolvedSymbol = intrinsicProp;
+                    }
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0);
+                    if (indexSignatureType) {
+                        links.jsxFlags |= 2;
+                        return links.resolvedSymbol = intrinsicElementsType.symbol;
+                    }
+                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
+                    return links.resolvedSymbol = unknownSymbol;
+                }
+                else {
+                    if (compilerOptions.noImplicitAny) {
+                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
+                    }
+                    return links.resolvedSymbol = unknownSymbol;
+                }
+            }
+            return links.resolvedSymbol;
+        }
+        function getJsxElementInstanceType(node, valueType) {
+            ts.Debug.assert(!(valueType.flags & 16384));
+            if (isTypeAny(valueType)) {
+                return anyType;
+            }
+            var signatures = getSignaturesOfType(valueType, 1);
+            if (signatures.length === 0) {
+                signatures = getSignaturesOfType(valueType, 0);
+                if (signatures.length === 0) {
+                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
+                    return unknownType;
+                }
+            }
+            return getUnionType(signatures.map(getReturnTypeOfSignature));
+        }
+        function getJsxElementPropertiesName() {
+            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1536, undefined);
+            var attribsPropTypeSym = jsxNamespace && getSymbol(jsxNamespace.exports, JsxNames.ElementAttributesPropertyNameContainer, 793056);
+            var attribPropType = attribsPropTypeSym && getDeclaredTypeOfSymbol(attribsPropTypeSym);
+            var attribProperties = attribPropType && getPropertiesOfType(attribPropType);
+            if (attribProperties) {
+                if (attribProperties.length === 0) {
+                    return "";
+                }
+                else if (attribProperties.length === 1) {
+                    return attribProperties[0].name;
+                }
+                else {
+                    error(attribsPropTypeSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, JsxNames.ElementAttributesPropertyNameContainer);
+                    return undefined;
+                }
+            }
+            else {
+                return undefined;
+            }
+        }
+        function getResolvedJsxType(node, elemType, elemClassType) {
+            if (!elemType) {
+                elemType = checkExpression(node.tagName);
+            }
+            if (elemType.flags & 16384) {
+                var types = elemType.types;
+                return getUnionType(types.map(function (type) {
+                    return getResolvedJsxType(node, type, elemClassType);
+                }));
+            }
+            var elemInstanceType = getJsxElementInstanceType(node, elemType);
+            if (!elemClassType || !isTypeAssignableTo(elemInstanceType, elemClassType)) {
+                if (jsxElementType) {
+                    var callSignatures = elemType && getSignaturesOfType(elemType, 0);
+                    var callSignature = callSignatures && callSignatures.length > 0 && callSignatures[0];
+                    var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
+                    var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                    if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType)) {
+                        var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
+                        if (intrinsicAttributes !== unknownType) {
+                            paramType = intersectTypes(intrinsicAttributes, paramType);
+                        }
+                        return paramType;
+                    }
+                }
+            }
+            if (elemClassType) {
+                checkTypeRelatedTo(elemInstanceType, elemClassType, assignableRelation, node, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
+            }
+            if (isTypeAny(elemInstanceType)) {
+                return elemInstanceType;
+            }
+            var propsName = getJsxElementPropertiesName();
+            if (propsName === undefined) {
+                return anyType;
+            }
+            else if (propsName === "") {
+                return elemInstanceType;
+            }
+            else {
+                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
+                if (!attributesType) {
+                    return emptyObjectType;
+                }
+                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
+                    return attributesType;
+                }
+                else if (attributesType.flags & 16384) {
+                    error(node.tagName, ts.Diagnostics.JSX_element_attributes_type_0_may_not_be_a_union_type, typeToString(attributesType));
+                    return anyType;
+                }
+                else {
+                    var apparentAttributesType = attributesType;
+                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
+                    if (intrinsicClassAttribs !== unknownType) {
+                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
+                        if (typeParams) {
+                            if (typeParams.length === 1) {
+                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
+                            }
+                        }
+                        else {
+                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
+                        }
+                    }
+                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
+                    if (intrinsicAttribs !== unknownType) {
+                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
+                    }
+                    return apparentAttributesType;
+                }
+            }
+        }
+        function getJsxElementAttributesType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedJsxType) {
+                if (isJsxIntrinsicIdentifier(node.tagName)) {
+                    var symbol = getIntrinsicTagSymbol(node);
+                    if (links.jsxFlags & 1) {
+                        return links.resolvedJsxType = getTypeOfSymbol(symbol);
+                    }
+                    else if (links.jsxFlags & 2) {
+                        return links.resolvedJsxType = getIndexInfoOfSymbol(symbol, 0).type;
+                    }
+                    else {
+                        return links.resolvedJsxType = unknownType;
+                    }
+                }
+                else {
+                    var elemClassType = getJsxGlobalElementClassType();
+                    return links.resolvedJsxType = getResolvedJsxType(node, undefined, elemClassType);
+                }
+            }
+            return links.resolvedJsxType;
+        }
+        function getJsxAttributePropertySymbol(attrib) {
+            var attributesType = getJsxElementAttributesType(attrib.parent);
+            var prop = getPropertyOfType(attributesType, attrib.name.text);
+            return prop || unknownSymbol;
+        }
+        function getJsxGlobalElementClassType() {
+            if (!jsxElementClassType) {
+                jsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
+            }
+            return jsxElementClassType;
+        }
+        function getJsxIntrinsicTagNames() {
+            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
+            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
+        }
+        function checkJsxPreconditions(errorNode) {
+            if ((compilerOptions.jsx || 0) === 0) {
+                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
+            }
+            if (jsxElementType === undefined) {
+                if (compilerOptions.noImplicitAny) {
+                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
+                }
+            }
+        }
+        function checkJsxOpeningLikeElement(node) {
+            checkGrammarJsxElement(node);
+            checkJsxPreconditions(node);
+            var reactRefErr = compilerOptions.jsx === 2 ? ts.Diagnostics.Cannot_find_name_0 : undefined;
+            var reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
+            var reactSym = resolveName(node.tagName, reactNamespace, 107455, reactRefErr, reactNamespace);
+            if (reactSym) {
+                getSymbolLinks(reactSym).referenced = true;
+            }
+            var targetAttributesType = getJsxElementAttributesType(node);
+            var nameTable = {};
+            var sawSpreadedAny = false;
+            for (var i = node.attributes.length - 1; i >= 0; i--) {
+                if (node.attributes[i].kind === 246) {
+                    checkJsxAttribute((node.attributes[i]), targetAttributesType, nameTable);
+                }
+                else {
+                    ts.Debug.assert(node.attributes[i].kind === 247);
+                    var spreadType = checkJsxSpreadAttribute((node.attributes[i]), targetAttributesType, nameTable);
+                    if (isTypeAny(spreadType)) {
+                        sawSpreadedAny = true;
+                    }
+                }
+            }
+            if (targetAttributesType && !sawSpreadedAny) {
+                var targetProperties = getPropertiesOfType(targetAttributesType);
+                for (var i = 0; i < targetProperties.length; i++) {
+                    if (!(targetProperties[i].flags & 536870912) &&
+                        nameTable[targetProperties[i].name] === undefined) {
+                        error(node, ts.Diagnostics.Property_0_is_missing_in_type_1, targetProperties[i].name, typeToString(targetAttributesType));
+                    }
+                }
+            }
+        }
+        function checkJsxExpression(node) {
+            if (node.expression) {
+                return checkExpression(node.expression);
+            }
+            else {
+                return unknownType;
+            }
+        }
+        function getDeclarationKindFromSymbol(s) {
+            return s.valueDeclaration ? s.valueDeclaration.kind : 145;
+        }
+        function getDeclarationFlagsFromSymbol(s) {
+            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : s.flags & 134217728 ? 4 | 32 : 0;
+        }
+        function checkClassPropertyAccess(node, left, type, prop) {
+            var flags = getDeclarationFlagsFromSymbol(prop);
+            var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop));
+            var errorNode = node.kind === 172 || node.kind === 218 ?
+                node.name :
+                node.right;
+            if (left.kind === 95) {
+                if (languageVersion < 2 && getDeclarationKindFromSymbol(prop) !== 147) {
+                    error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
+                    return false;
+                }
+                if (flags & 128) {
+                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass));
+                    return false;
+                }
+            }
+            if (!(flags & (8 | 16))) {
+                return true;
+            }
+            if (flags & 8) {
+                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
+                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass));
+                    return false;
+                }
+                return true;
+            }
+            if (left.kind === 95) {
+                return true;
+            }
+            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
+                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
+                return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined;
+            });
+            if (!enclosingClass) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass));
+                return false;
+            }
+            if (flags & 32) {
+                return true;
+            }
+            if (type.flags & 33554432) {
+                type = getConstraintOfTypeParameter(type);
+            }
+            if (!(getTargetType(type).flags & (1024 | 2048) && hasBaseType(type, enclosingClass))) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
+                return false;
+            }
+            return true;
+        }
+        function checkNonNullExpression(node) {
+            var type = checkExpression(node);
+            if (strictNullChecks) {
+                var kind = getCombinedTypeFlags(type) & 96;
+                if (kind) {
+                    error(node, kind & 32 ? kind & 64 ?
+                        ts.Diagnostics.Object_is_possibly_null_or_undefined :
+                        ts.Diagnostics.Object_is_possibly_undefined :
+                        ts.Diagnostics.Object_is_possibly_null);
+                }
+                return getNonNullableType(type);
+            }
+            return type;
+        }
+        function checkPropertyAccessExpression(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
+        }
+        function checkQualifiedName(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
+        }
+        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
+            var type = checkNonNullExpression(left);
+            if (isTypeAny(type)) {
+                return type;
+            }
+            var apparentType = getApparentType(getWidenedType(type));
+            if (apparentType === unknownType || (type.flags & 512 && isTypeAny(apparentType))) {
+                return apparentType;
+            }
+            var prop = getPropertyOfType(apparentType, right.text);
+            if (!prop) {
+                if (right.text) {
+                    error(right, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(right), typeToString(type.flags & 33554432 ? apparentType : type));
+                }
+                return unknownType;
+            }
+            getNodeLinks(node).resolvedSymbol = prop;
+            if (prop.parent && prop.parent.flags & 32) {
+                checkClassPropertyAccess(node, left, apparentType, prop);
+            }
+            var propType = getTypeOfSymbol(prop);
+            if (node.kind !== 172 || ts.isAssignmentTarget(node) ||
+                !(prop.flags & (3 | 4 | 98304)) &&
+                    !(prop.flags & 8192 && propType.flags & 16384)) {
+                return propType;
+            }
+            return getFlowTypeOfReference(node, propType, true, false);
+        }
+        function isValidPropertyAccess(node, propertyName) {
+            var left = node.kind === 172
+                ? node.expression
+                : node.left;
+            var type = checkExpression(left);
+            if (type !== unknownType && !isTypeAny(type)) {
+                var prop = getPropertyOfType(getWidenedType(type), propertyName);
+                if (prop && prop.parent && prop.parent.flags & 32) {
+                    return checkClassPropertyAccess(node, left, type, prop);
+                }
+            }
+            return true;
+        }
+        function getForInVariableSymbol(node) {
+            var initializer = node.initializer;
+            if (initializer.kind === 219) {
+                var variable = initializer.declarations[0];
+                if (variable && !ts.isBindingPattern(variable.name)) {
+                    return getSymbolOfNode(variable);
+                }
+            }
+            else if (initializer.kind === 69) {
+                return getResolvedSymbol(initializer);
+            }
+            return undefined;
+        }
+        function hasNumericPropertyNames(type) {
+            return getIndexTypeOfType(type, 1) && !getIndexTypeOfType(type, 0);
+        }
+        function isForInVariableForNumericPropertyNames(expr) {
+            var e = skipParenthesizedNodes(expr);
+            if (e.kind === 69) {
+                var symbol = getResolvedSymbol(e);
+                if (symbol.flags & 3) {
+                    var child = expr;
+                    var node = expr.parent;
+                    while (node) {
+                        if (node.kind === 207 &&
+                            child === node.statement &&
+                            getForInVariableSymbol(node) === symbol &&
+                            hasNumericPropertyNames(checkExpression(node.expression))) {
+                            return true;
+                        }
+                        child = node;
+                        node = node.parent;
+                    }
+                }
+            }
+            return false;
+        }
+        function checkIndexedAccess(node) {
+            if (!node.argumentExpression) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                if (node.parent.kind === 175 && node.parent.expression === node) {
+                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
+                }
+                else {
+                    var start = node.end - "]".length;
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
+                }
+            }
+            var objectType = getApparentType(checkNonNullExpression(node.expression));
+            var indexType = node.argumentExpression ? checkExpression(node.argumentExpression) : unknownType;
+            if (objectType === unknownType) {
+                return unknownType;
+            }
+            var isConstEnum = isConstEnumObjectType(objectType);
+            if (isConstEnum &&
+                (!node.argumentExpression || node.argumentExpression.kind !== 9)) {
+                error(node.argumentExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
+                return unknownType;
+            }
+            if (node.argumentExpression) {
+                var name_13 = getPropertyNameForIndexedAccess(node.argumentExpression, indexType);
+                if (name_13 !== undefined) {
+                    var prop = getPropertyOfType(objectType, name_13);
+                    if (prop) {
+                        getNodeLinks(node).resolvedSymbol = prop;
+                        return getTypeOfSymbol(prop);
+                    }
+                    else if (isConstEnum) {
+                        error(node.argumentExpression, ts.Diagnostics.Property_0_does_not_exist_on_const_enum_1, name_13, symbolToString(objectType.symbol));
+                        return unknownType;
+                    }
+                }
+            }
+            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 258 | 132 | 16777216)) {
+                if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 132) || isForInVariableForNumericPropertyNames(node.argumentExpression)) {
+                    var numberIndexInfo = getIndexInfoOfType(objectType, 1);
+                    if (numberIndexInfo) {
+                        getNodeLinks(node).resolvedIndexInfo = numberIndexInfo;
+                        return numberIndexInfo.type;
+                    }
+                }
+                var stringIndexInfo = getIndexInfoOfType(objectType, 0);
+                if (stringIndexInfo) {
+                    getNodeLinks(node).resolvedIndexInfo = stringIndexInfo;
+                    return stringIndexInfo.type;
+                }
+                if (compilerOptions.noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors && !isTypeAny(objectType)) {
+                    error(node, getIndexTypeOfType(objectType, 1) ?
+                        ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number :
+                        ts.Diagnostics.Index_signature_of_object_type_implicitly_has_an_any_type);
+                }
+                return anyType;
+            }
+            error(node, ts.Diagnostics.An_index_expression_argument_must_be_of_type_string_number_symbol_or_any);
+            return unknownType;
+        }
+        function getPropertyNameForIndexedAccess(indexArgumentExpression, indexArgumentType) {
+            if (indexArgumentExpression.kind === 9 || indexArgumentExpression.kind === 8) {
+                return indexArgumentExpression.text;
+            }
+            if (indexArgumentExpression.kind === 173 || indexArgumentExpression.kind === 172) {
+                var value = getConstantValue(indexArgumentExpression);
+                if (value !== undefined) {
+                    return value.toString();
+                }
+            }
+            if (checkThatExpressionIsProperSymbolReference(indexArgumentExpression, indexArgumentType, false)) {
+                var rightHandSideName = indexArgumentExpression.name.text;
+                return ts.getPropertyNameForKnownSymbolName(rightHandSideName);
+            }
+            return undefined;
+        }
+        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
+            if (expressionType === unknownType) {
+                return false;
+            }
+            if (!ts.isWellKnownSymbolSyntactically(expression)) {
+                return false;
+            }
+            if ((expressionType.flags & 16777216) === 0) {
+                if (reportError) {
+                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
+                }
+                return false;
+            }
+            var leftHandSide = expression.expression;
+            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
+            if (!leftHandSideSymbol) {
+                return false;
+            }
+            var globalESSymbol = getGlobalESSymbolConstructorSymbol();
+            if (!globalESSymbol) {
+                return false;
+            }
+            if (leftHandSideSymbol !== globalESSymbol) {
+                if (reportError) {
+                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
+                }
+                return false;
+            }
+            return true;
+        }
+        function resolveUntypedCall(node) {
+            if (node.kind === 176) {
+                checkExpression(node.template);
+            }
+            else if (node.kind !== 143) {
+                ts.forEach(node.arguments, function (argument) {
+                    checkExpression(argument);
+                });
+            }
+            return anySignature;
+        }
+        function resolveErrorCall(node) {
+            resolveUntypedCall(node);
+            return unknownSignature;
+        }
+        function reorderCandidates(signatures, result) {
+            var lastParent;
+            var lastSymbol;
+            var cutoffIndex = 0;
+            var index;
+            var specializedIndex = -1;
+            var spliceIndex;
+            ts.Debug.assert(!result.length);
+            for (var _i = 0, signatures_2 = signatures; _i < signatures_2.length; _i++) {
+                var signature = signatures_2[_i];
+                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
+                var parent_9 = signature.declaration && signature.declaration.parent;
+                if (!lastSymbol || symbol === lastSymbol) {
+                    if (lastParent && parent_9 === lastParent) {
+                        index++;
+                    }
+                    else {
+                        lastParent = parent_9;
+                        index = cutoffIndex;
+                    }
+                }
+                else {
+                    index = cutoffIndex = result.length;
+                    lastParent = parent_9;
+                }
+                lastSymbol = symbol;
+                if (signature.hasStringLiterals) {
+                    specializedIndex++;
+                    spliceIndex = specializedIndex;
+                    cutoffIndex++;
+                }
+                else {
+                    spliceIndex = index;
+                }
+                result.splice(spliceIndex, 0, signature);
+            }
+        }
+        function getSpreadArgumentIndex(args) {
+            for (var i = 0; i < args.length; i++) {
+                var arg = args[i];
+                if (arg && arg.kind === 191) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+        function hasCorrectArity(node, args, signature, signatureHelpTrailingComma) {
+            if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+            var argCount;
+            var typeArguments;
+            var callIsIncomplete;
+            var isDecorator;
+            var spreadArgIndex = -1;
+            if (node.kind === 176) {
+                var tagExpression = node;
+                argCount = args.length;
+                typeArguments = undefined;
+                if (tagExpression.template.kind === 189) {
+                    var templateExpression = tagExpression.template;
+                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
+                    ts.Debug.assert(lastSpan !== undefined);
+                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
+                }
+                else {
+                    var templateLiteral = tagExpression.template;
+                    ts.Debug.assert(templateLiteral.kind === 11);
+                    callIsIncomplete = !!templateLiteral.isUnterminated;
+                }
+            }
+            else if (node.kind === 143) {
+                isDecorator = true;
+                typeArguments = undefined;
+                argCount = getEffectiveArgumentCount(node, undefined, signature);
+            }
+            else {
+                var callExpression = node;
+                if (!callExpression.arguments) {
+                    ts.Debug.assert(callExpression.kind === 175);
+                    return signature.minArgumentCount === 0;
+                }
+                argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
+                callIsIncomplete = callExpression.arguments.end === callExpression.end;
+                typeArguments = callExpression.typeArguments;
+                spreadArgIndex = getSpreadArgumentIndex(args);
+            }
+            var hasRightNumberOfTypeArgs = !typeArguments ||
+                (signature.typeParameters && typeArguments.length === signature.typeParameters.length);
+            if (!hasRightNumberOfTypeArgs) {
+                return false;
+            }
+            if (spreadArgIndex >= 0) {
+                return isRestParameterIndex(signature, spreadArgIndex);
+            }
+            if (!signature.hasRestParameter && argCount > signature.parameters.length) {
+                return false;
+            }
+            var hasEnoughArguments = argCount >= signature.minArgumentCount;
+            return callIsIncomplete || hasEnoughArguments;
+        }
+        function getSingleCallSignature(type) {
+            if (type.flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
+                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                    return resolved.callSignatures[0];
+                }
+            }
+            return undefined;
+        }
+        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
+            var context = createInferenceContext(signature.typeParameters, true);
+            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
+                inferTypes(context, instantiateType(source, contextualMapper), target);
+            });
+            return getSignatureInstantiation(signature, getInferredTypes(context));
+        }
+        function inferTypeArguments(node, signature, args, excludeArgument, context) {
+            var typeParameters = signature.typeParameters;
+            var inferenceMapper = getInferenceMapper(context);
+            for (var i = 0; i < typeParameters.length; i++) {
+                if (!context.inferences[i].isFixed) {
+                    context.inferredTypes[i] = undefined;
+                }
+            }
+            if (context.failedTypeParameterIndex !== undefined && !context.inferences[context.failedTypeParameterIndex].isFixed) {
+                context.failedTypeParameterIndex = undefined;
+            }
+            if (signature.thisType) {
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                inferTypes(context, thisArgumentType, signature.thisType);
+            }
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                if (arg === undefined || arg.kind !== 193) {
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i, arg);
+                    if (argType === undefined) {
+                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : inferenceMapper;
+                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
+                    }
+                    inferTypes(context, argType, paramType);
+                }
+            }
+            if (excludeArgument) {
+                for (var i = 0; i < argCount; i++) {
+                    if (excludeArgument[i] === false) {
+                        var arg = args[i];
+                        var paramType = getTypeAtPosition(signature, i);
+                        inferTypes(context, checkExpressionWithContextualType(arg, paramType, inferenceMapper), paramType);
+                    }
+                }
+            }
+            getInferredTypes(context);
+        }
+        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
+            var typeParameters = signature.typeParameters;
+            var typeArgumentsAreAssignable = true;
+            var mapper;
+            for (var i = 0; i < typeParameters.length; i++) {
+                if (typeArgumentsAreAssignable) {
+                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                    if (constraint) {
+                        var errorInfo = void 0;
+                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
+                        if (reportErrors && headMessage) {
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
+                            typeArgumentHeadMessage = headMessage;
+                        }
+                        if (!mapper) {
+                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
+                        }
+                        var typeArgument = typeArgumentTypes[i];
+                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
+                    }
+                }
+            }
+            return typeArgumentsAreAssignable;
+        }
+        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
+            if (signature.thisType && signature.thisType !== voidType && node.kind !== 175) {
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
+                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
+                if (!checkTypeRelatedTo(thisArgumentType, signature.thisType, relation, errorNode, headMessage_1)) {
+                    return false;
+                }
+            }
+            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                if (arg === undefined || arg.kind !== 193) {
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i, arg);
+                    if (argType === undefined) {
+                        argType = arg.kind === 9 && !reportErrors
+                            ? getStringLiteralTypeForText(arg.text)
+                            : checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
+                    }
+                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
+                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function getThisArgumentOfCall(node) {
+            if (node.kind === 174) {
+                var callee = node.expression;
+                if (callee.kind === 172) {
+                    return callee.expression;
+                }
+                else if (callee.kind === 173) {
+                    return callee.expression;
+                }
+            }
+        }
+        function getEffectiveCallArguments(node) {
+            var args;
+            if (node.kind === 176) {
+                var template = node.template;
+                args = [undefined];
+                if (template.kind === 189) {
+                    ts.forEach(template.templateSpans, function (span) {
+                        args.push(span.expression);
+                    });
+                }
+            }
+            else if (node.kind === 143) {
+                return undefined;
+            }
+            else {
+                args = node.arguments || emptyArray;
+            }
+            return args;
+        }
+        function getEffectiveArgumentCount(node, args, signature) {
+            if (node.kind === 143) {
+                switch (node.parent.kind) {
+                    case 221:
+                    case 192:
+                        return 1;
+                    case 145:
+                        return 2;
+                    case 147:
+                    case 149:
+                    case 150:
+                        if (languageVersion === 0) {
+                            return 2;
+                        }
+                        return signature.parameters.length >= 3 ? 3 : 2;
+                    case 142:
+                        return 3;
+                }
+            }
+            else {
+                return args.length;
+            }
+        }
+        function getEffectiveDecoratorFirstArgumentType(node) {
+            if (node.kind === 221) {
+                var classSymbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(classSymbol);
+            }
+            if (node.kind === 142) {
+                node = node.parent;
+                if (node.kind === 148) {
+                    var classSymbol = getSymbolOfNode(node);
+                    return getTypeOfSymbol(classSymbol);
+                }
+            }
+            if (node.kind === 145 ||
+                node.kind === 147 ||
+                node.kind === 149 ||
+                node.kind === 150) {
+                return getParentTypeOfClassElement(node);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        function getEffectiveDecoratorSecondArgumentType(node) {
+            if (node.kind === 221) {
+                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 142) {
+                node = node.parent;
+                if (node.kind === 148) {
+                    return anyType;
+                }
+            }
+            if (node.kind === 145 ||
+                node.kind === 147 ||
+                node.kind === 149 ||
+                node.kind === 150) {
+                var element = node;
+                switch (element.name.kind) {
+                    case 69:
+                    case 8:
+                    case 9:
+                        return getStringLiteralTypeForText(element.name.text);
+                    case 140:
+                        var nameType = checkComputedPropertyName(element.name);
+                        if (isTypeOfKind(nameType, 16777216)) {
+                            return nameType;
+                        }
+                        else {
+                            return stringType;
+                        }
+                    default:
+                        ts.Debug.fail("Unsupported property name.");
+                        return unknownType;
+                }
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        function getEffectiveDecoratorThirdArgumentType(node) {
+            if (node.kind === 221) {
+                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 142) {
+                return numberType;
+            }
+            if (node.kind === 145) {
+                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 147 ||
+                node.kind === 149 ||
+                node.kind === 150) {
+                var propertyType = getTypeOfNode(node);
+                return createTypedPropertyDescriptorType(propertyType);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        function getEffectiveDecoratorArgumentType(node, argIndex) {
+            if (argIndex === 0) {
+                return getEffectiveDecoratorFirstArgumentType(node.parent);
+            }
+            else if (argIndex === 1) {
+                return getEffectiveDecoratorSecondArgumentType(node.parent);
+            }
+            else if (argIndex === 2) {
+                return getEffectiveDecoratorThirdArgumentType(node.parent);
+            }
+            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
+            return unknownType;
+        }
+        function getEffectiveArgumentType(node, argIndex, arg) {
+            if (node.kind === 143) {
+                return getEffectiveDecoratorArgumentType(node, argIndex);
+            }
+            else if (argIndex === 0 && node.kind === 176) {
+                return getGlobalTemplateStringsArrayType();
+            }
+            return undefined;
+        }
+        function getEffectiveArgument(node, args, argIndex) {
+            if (node.kind === 143 ||
+                (argIndex === 0 && node.kind === 176)) {
+                return undefined;
+            }
+            return args[argIndex];
+        }
+        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
+            if (node.kind === 143) {
+                return node.expression;
+            }
+            else if (argIndex === 0 && node.kind === 176) {
+                return node.template;
+            }
+            else {
+                return arg;
+            }
+        }
+        function resolveCall(node, signatures, candidatesOutArray, headMessage) {
+            var isTaggedTemplate = node.kind === 176;
+            var isDecorator = node.kind === 143;
+            var typeArguments;
+            if (!isTaggedTemplate && !isDecorator) {
+                typeArguments = node.typeArguments;
+                if (node.expression.kind !== 95) {
+                    ts.forEach(typeArguments, checkSourceElement);
+                }
+            }
+            var candidates = candidatesOutArray || [];
+            reorderCandidates(signatures, candidates);
+            if (!candidates.length) {
+                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+                return resolveErrorCall(node);
+            }
+            var args = getEffectiveCallArguments(node);
+            var excludeArgument;
+            if (!isDecorator) {
+                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
+                    if (isContextSensitive(args[i])) {
+                        if (!excludeArgument) {
+                            excludeArgument = new Array(args.length);
+                        }
+                        excludeArgument[i] = true;
+                    }
+                }
+            }
+            var candidateForArgumentError;
+            var candidateForTypeArgumentError;
+            var resultOfFailedInference;
+            var result;
+            var signatureHelpTrailingComma = candidatesOutArray && node.kind === 174 && node.arguments.hasTrailingComma;
+            if (candidates.length > 1) {
+                result = chooseOverload(candidates, subtypeRelation, signatureHelpTrailingComma);
+            }
+            if (!result) {
+                candidateForArgumentError = undefined;
+                candidateForTypeArgumentError = undefined;
+                resultOfFailedInference = undefined;
+                result = chooseOverload(candidates, assignableRelation, signatureHelpTrailingComma);
+            }
+            if (result) {
+                return result;
+            }
+            if (candidateForArgumentError) {
+                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, undefined, true);
+            }
+            else if (candidateForTypeArgumentError) {
+                if (!isTaggedTemplate && !isDecorator && typeArguments) {
+                    var typeArguments_2 = node.typeArguments;
+                    checkTypeArguments(candidateForTypeArgumentError, typeArguments_2, ts.map(typeArguments_2, getTypeFromTypeNode), true, headMessage);
+                }
+                else {
+                    ts.Debug.assert(resultOfFailedInference.failedTypeParameterIndex >= 0);
+                    var failedTypeParameter = candidateForTypeArgumentError.typeParameters[resultOfFailedInference.failedTypeParameterIndex];
+                    var inferenceCandidates = getInferenceCandidates(resultOfFailedInference, resultOfFailedInference.failedTypeParameterIndex);
+                    var diagnosticChainHead = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly, typeToString(failedTypeParameter));
+                    if (headMessage) {
+                        diagnosticChainHead = ts.chainDiagnosticMessages(diagnosticChainHead, headMessage);
+                    }
+                    reportNoCommonSupertypeError(inferenceCandidates, node.expression || node.tag, diagnosticChainHead);
+                }
+            }
+            else {
+                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+            }
+            if (!produceDiagnostics) {
+                for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
+                    var candidate = candidates_1[_i];
+                    if (hasCorrectArity(node, args, candidate)) {
+                        if (candidate.typeParameters && typeArguments) {
+                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNode));
+                        }
+                        return candidate;
+                    }
+                }
+            }
+            return resolveErrorCall(node);
+            function reportError(message, arg0, arg1, arg2) {
+                var errorInfo;
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+                if (headMessage) {
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
+                }
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+            }
+            function chooseOverload(candidates, relation, signatureHelpTrailingComma) {
+                if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
+                    var originalCandidate = candidates_2[_i];
+                    if (!hasCorrectArity(node, args, originalCandidate, signatureHelpTrailingComma)) {
+                        continue;
+                    }
+                    var candidate = void 0;
+                    var typeArgumentsAreValid = void 0;
+                    var inferenceContext = originalCandidate.typeParameters
+                        ? createInferenceContext(originalCandidate.typeParameters, false)
+                        : undefined;
+                    while (true) {
+                        candidate = originalCandidate;
+                        if (candidate.typeParameters) {
+                            var typeArgumentTypes = void 0;
+                            if (typeArguments) {
+                                typeArgumentTypes = ts.map(typeArguments, getTypeFromTypeNode);
+                                typeArgumentsAreValid = checkTypeArguments(candidate, typeArguments, typeArgumentTypes, false);
+                            }
+                            else {
+                                inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
+                                typeArgumentsAreValid = inferenceContext.failedTypeParameterIndex === undefined;
+                                typeArgumentTypes = inferenceContext.inferredTypes;
+                            }
+                            if (!typeArgumentsAreValid) {
+                                break;
+                            }
+                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
+                        }
+                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, false)) {
+                            break;
+                        }
+                        var index = excludeArgument ? ts.indexOf(excludeArgument, true) : -1;
+                        if (index < 0) {
+                            return candidate;
+                        }
+                        excludeArgument[index] = false;
+                    }
+                    if (originalCandidate.typeParameters) {
+                        var instantiatedCandidate = candidate;
+                        if (typeArgumentsAreValid) {
+                            candidateForArgumentError = instantiatedCandidate;
+                        }
+                        else {
+                            candidateForTypeArgumentError = originalCandidate;
+                            if (!typeArguments) {
+                                resultOfFailedInference = inferenceContext;
+                            }
+                        }
+                    }
+                    else {
+                        ts.Debug.assert(originalCandidate === candidate);
+                        candidateForArgumentError = originalCandidate;
+                    }
+                }
+                return undefined;
+            }
+        }
+        function resolveCallExpression(node, candidatesOutArray) {
+            if (node.expression.kind === 95) {
+                var superType = checkSuperExpression(node.expression);
+                if (superType !== unknownType) {
+                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
+                    if (baseTypeNode) {
+                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments);
+                        return resolveCall(node, baseConstructors, candidatesOutArray);
+                    }
+                }
+                return resolveUntypedCall(node);
+            }
+            var funcType = checkNonNullExpression(node.expression);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0);
+            var constructSignatures = getSignaturesOfType(apparentType, 1);
+            if (isTypeAny(funcType) ||
+                (isTypeAny(apparentType) && funcType.flags & 512) ||
+                (!callSignatures.length && !constructSignatures.length && !(funcType.flags & 16384) && isTypeAssignableTo(funcType, globalFunctionType))) {
+                if (funcType !== unknownType && node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+                }
+                return resolveUntypedCall(node);
+            }
+            if (!callSignatures.length) {
+                if (constructSignatures.length) {
+                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
+                }
+                else {
+                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                }
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray);
+        }
+        function resolveNewExpression(node, candidatesOutArray) {
+            if (node.arguments && languageVersion < 1) {
+                var spreadIndex = getSpreadArgumentIndex(node.arguments);
+                if (spreadIndex >= 0) {
+                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
+                }
+            }
+            var expressionType = checkNonNullExpression(node.expression);
+            expressionType = getApparentType(expressionType);
+            if (expressionType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
+            if (valueDecl && valueDecl.flags & 128) {
+                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
+                return resolveErrorCall(node);
+            }
+            if (isTypeAny(expressionType)) {
+                if (node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+                }
+                return resolveUntypedCall(node);
+            }
+            var constructSignatures = getSignaturesOfType(expressionType, 1);
+            if (constructSignatures.length) {
+                if (!isConstructorAccessible(node, constructSignatures[0])) {
+                    return resolveErrorCall(node);
+                }
+                return resolveCall(node, constructSignatures, candidatesOutArray);
+            }
+            var callSignatures = getSignaturesOfType(expressionType, 0);
+            if (callSignatures.length) {
+                var signature = resolveCall(node, callSignatures, candidatesOutArray);
+                if (getReturnTypeOfSignature(signature) !== voidType) {
+                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
+                }
+                if (signature.thisType === voidType) {
+                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
+                }
+                return signature;
+            }
+            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
+            return resolveErrorCall(node);
+        }
+        function isConstructorAccessible(node, signature) {
+            if (!signature || !signature.declaration) {
+                return true;
+            }
+            var declaration = signature.declaration;
+            var flags = declaration.flags;
+            if (!(flags & (8 | 16))) {
+                return true;
+            }
+            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
+            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
+            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                if (flags & 8) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                if (flags & 16) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                return false;
+            }
+            return true;
+        }
+        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
+            var tagType = checkExpression(node.tag);
+            var apparentType = getApparentType(tagType);
+            if (apparentType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0);
+            if (isTypeAny(tagType) || (!callSignatures.length && !(tagType.flags & 16384) && isTypeAssignableTo(tagType, globalFunctionType))) {
+                return resolveUntypedCall(node);
+            }
+            if (!callSignatures.length) {
+                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray);
+        }
+        function getDiagnosticHeadMessageForDecoratorResolution(node) {
+            switch (node.parent.kind) {
+                case 221:
+                case 192:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
+                case 142:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
+                case 145:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
+                case 147:
+                case 149:
+                case 150:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
+            }
+        }
+        function resolveDecorator(node, candidatesOutArray) {
+            var funcType = checkExpression(node.expression);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0);
+            if (funcType === anyType || (!callSignatures.length && !(funcType.flags & 16384) && isTypeAssignableTo(funcType, globalFunctionType))) {
+                return resolveUntypedCall(node);
+            }
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            if (!callSignatures.length) {
+                var errorInfo = void 0;
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
+        }
+        function resolveSignature(node, candidatesOutArray) {
+            switch (node.kind) {
+                case 174:
+                    return resolveCallExpression(node, candidatesOutArray);
+                case 175:
+                    return resolveNewExpression(node, candidatesOutArray);
+                case 176:
+                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
+                case 143:
+                    return resolveDecorator(node, candidatesOutArray);
+            }
+            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
+        }
+        function getResolvedSignature(node, candidatesOutArray) {
+            var links = getNodeLinks(node);
+            var cached = links.resolvedSignature;
+            if (cached && cached !== anySignature && !candidatesOutArray) {
+                return cached;
+            }
+            links.resolvedSignature = anySignature;
+            var result = resolveSignature(node, candidatesOutArray);
+            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
+            return result;
+        }
+        function getResolvedOrAnySignature(node) {
+            return getNodeLinks(node).resolvedSignature === anySignature ? anySignature : getResolvedSignature(node);
+        }
+        function getInferredClassType(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.inferredClassType) {
+                links.inferredClassType = createAnonymousType(undefined, symbol.members, emptyArray, emptyArray, undefined, undefined);
+            }
+            return links.inferredClassType;
+        }
+        function checkCallExpression(node) {
+            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
+            var signature = getResolvedSignature(node);
+            if (node.expression.kind === 95) {
+                return voidType;
+            }
+            if (node.kind === 175) {
+                var declaration = signature.declaration;
+                if (declaration &&
+                    declaration.kind !== 148 &&
+                    declaration.kind !== 152 &&
+                    declaration.kind !== 157 &&
+                    !ts.isJSDocConstructSignature(declaration)) {
+                    var funcSymbol = checkExpression(node.expression).symbol;
+                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16)) {
+                        return getInferredClassType(funcSymbol);
+                    }
+                    else if (compilerOptions.noImplicitAny) {
+                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
+                    }
+                    return anyType;
+                }
+            }
+            if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, true)) {
+                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
+            }
+            return getReturnTypeOfSignature(signature);
+        }
+        function checkTaggedTemplateExpression(node) {
+            return getReturnTypeOfSignature(getResolvedSignature(node));
+        }
+        function checkAssertion(node) {
+            var exprType = getRegularTypeOfObjectLiteral(checkExpression(node.expression));
+            var targetType = getTypeFromTypeNode(node.type);
+            if (produceDiagnostics && targetType !== unknownType) {
+                var widenedType = getWidenedType(exprType);
+                if (!isTypeComparableTo(targetType, widenedType)) {
+                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
+                }
+            }
+            return targetType;
+        }
+        function checkNonNullAssertion(node) {
+            return getNonNullableType(checkExpression(node.expression));
+        }
+        function getTypeOfParameter(symbol) {
+            var type = getTypeOfSymbol(symbol);
+            if (strictNullChecks) {
+                var declaration = symbol.valueDeclaration;
+                if (declaration && declaration.initializer) {
+                    return addTypeKind(type, 32);
+                }
+            }
+            return type;
+        }
+        function getTypeAtPosition(signature, pos) {
+            return signature.hasRestParameter ?
+                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
+                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
+        }
+        function assignContextualParameterTypes(signature, context, mapper) {
+            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            for (var i = 0; i < len; i++) {
+                var parameter = signature.parameters[i];
+                var contextualParameterType = getTypeAtPosition(context, i);
+                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            }
+            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
+                var parameter = ts.lastOrUndefined(signature.parameters);
+                var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
+                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            }
+        }
+        function assignBindingElementTypes(node) {
+            if (ts.isBindingPattern(node.name)) {
+                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (element.kind !== 193) {
+                        if (element.name.kind === 69) {
+                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
+                        }
+                        assignBindingElementTypes(element);
+                    }
+                }
+            }
+        }
+        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType, mapper) {
+            var links = getSymbolLinks(parameter);
+            if (!links.type) {
+                links.type = instantiateType(contextualType, mapper);
+                if (links.type === emptyObjectType &&
+                    (parameter.valueDeclaration.name.kind === 167 ||
+                        parameter.valueDeclaration.name.kind === 168)) {
+                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
+                }
+                assignBindingElementTypes(parameter.valueDeclaration);
+            }
+            else if (isInferentialContext(mapper)) {
+                inferTypes(mapper.context, links.type, instantiateType(contextualType, mapper));
+            }
+        }
+        function getReturnTypeFromJSDocComment(func) {
+            var returnTag = ts.getJSDocReturnTag(func);
+            if (returnTag && returnTag.typeExpression) {
+                return getTypeFromTypeNode(returnTag.typeExpression.type);
+            }
+            return undefined;
+        }
+        function createPromiseType(promisedType) {
+            var globalPromiseType = getGlobalPromiseType();
+            if (globalPromiseType !== emptyGenericType) {
+                promisedType = getAwaitedType(promisedType);
+                return createTypeReference(globalPromiseType, [promisedType]);
+            }
+            return emptyObjectType;
+        }
+        function getReturnTypeFromBody(func, contextualMapper) {
+            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
+            if (!func.body) {
+                return unknownType;
+            }
+            var isAsync = ts.isAsyncFunctionLike(func);
+            var type;
+            if (func.body.kind !== 199) {
+                type = checkExpressionCached(func.body, contextualMapper);
+                if (isAsync) {
+                    type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                }
+            }
+            else {
+                var types = void 0;
+                var funcIsGenerator = !!func.asteriskToken;
+                if (funcIsGenerator) {
+                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
+                    if (types.length === 0) {
+                        var iterableIteratorAny = createIterableIteratorType(anyType);
+                        if (compilerOptions.noImplicitAny) {
+                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
+                        }
+                        return iterableIteratorAny;
+                    }
+                }
+                else {
+                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
+                    if (!types) {
+                        return neverType;
+                    }
+                    if (types.length === 0) {
+                        if (isAsync) {
+                            var promiseType = createPromiseType(voidType);
+                            if (promiseType === emptyObjectType) {
+                                error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+                                return unknownType;
+                            }
+                            return promiseType;
+                        }
+                        return voidType;
+                    }
+                }
+                type = contextualSignature ? getUnionType(types) : getCommonSupertype(types);
+                if (!type) {
+                    if (funcIsGenerator) {
+                        error(func, ts.Diagnostics.No_best_common_type_exists_among_yield_expressions);
+                        return createIterableIteratorType(unknownType);
+                    }
+                    else {
+                        error(func, ts.Diagnostics.No_best_common_type_exists_among_return_expressions);
+                        return getUnionType(types);
+                    }
+                }
+                if (funcIsGenerator) {
+                    type = createIterableIteratorType(type);
+                }
+            }
+            if (!contextualSignature) {
+                reportErrorsFromWidening(func, type);
+            }
+            var widenedType = getWidenedType(type);
+            if (isAsync) {
+                var promiseType = createPromiseType(widenedType);
+                if (promiseType === emptyObjectType) {
+                    error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+                    return unknownType;
+                }
+                return promiseType;
+            }
+            else {
+                return widenedType;
+            }
+        }
+        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
+            var aggregatedTypes = [];
+            ts.forEachYieldExpression(func.body, function (yieldExpression) {
+                var expr = yieldExpression.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, contextualMapper);
+                    if (yieldExpression.asteriskToken) {
+                        type = checkElementTypeOfIterable(type, yieldExpression.expression);
+                    }
+                    if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
+                    }
+                }
+            });
+            return aggregatedTypes;
+        }
+        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
+            var isAsync = ts.isAsyncFunctionLike(func);
+            var aggregatedTypes = [];
+            var hasReturnWithNoExpression = !!(func.flags & 32768);
+            var hasReturnOfTypeNever = false;
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
+                var expr = returnStatement.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, contextualMapper);
+                    if (isAsync) {
+                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                    }
+                    if (type === neverType) {
+                        hasReturnOfTypeNever = true;
+                    }
+                    else if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
+                    }
+                }
+                else {
+                    hasReturnWithNoExpression = true;
+                }
+            });
+            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
+                func.kind === 179 || func.kind === 180)) {
+                return undefined;
+            }
+            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
+                if (!ts.contains(aggregatedTypes, undefinedType)) {
+                    aggregatedTypes.push(undefinedType);
+                }
+            }
+            return aggregatedTypes;
+        }
+        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            if (returnType && maybeTypeOfKind(returnType, 1 | 16)) {
+                return;
+            }
+            if (ts.nodeIsMissing(func.body) || func.body.kind !== 199 || !(func.flags & 32768)) {
+                return;
+            }
+            var hasExplicitReturn = func.flags & 65536;
+            if (returnType === neverType) {
+                error(func.type, ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
+            }
+            else if (returnType && !hasExplicitReturn) {
+                error(func.type, ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
+            }
+            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
+                error(func.type, ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
+            }
+            else if (compilerOptions.noImplicitReturns) {
+                if (!returnType) {
+                    if (!hasExplicitReturn) {
+                        return;
+                    }
+                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
+                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
+                        return;
+                    }
+                }
+                error(func.type || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
+            }
+        }
+        function checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper) {
+            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
+            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
+            if (!hasGrammarError && node.kind === 179) {
+                checkGrammarForGenerator(node);
+            }
+            if (contextualMapper === identityMapper && isContextSensitive(node)) {
+                checkNodeDeferred(node);
+                return anyFunctionType;
+            }
+            var links = getNodeLinks(node);
+            var type = getTypeOfSymbol(node.symbol);
+            var contextSensitive = isContextSensitive(node);
+            var mightFixTypeParameters = contextSensitive && isInferentialContext(contextualMapper);
+            if (mightFixTypeParameters || !(links.flags & 1024)) {
+                var contextualSignature = getContextualSignature(node);
+                var contextChecked = !!(links.flags & 1024);
+                if (mightFixTypeParameters || !contextChecked) {
+                    links.flags |= 1024;
+                    if (contextualSignature) {
+                        var signature = getSignaturesOfType(type, 0)[0];
+                        if (contextSensitive) {
+                            assignContextualParameterTypes(signature, contextualSignature, contextualMapper || identityMapper);
+                        }
+                        if (mightFixTypeParameters || !node.type && !signature.resolvedReturnType) {
+                            var returnType = getReturnTypeFromBody(node, contextualMapper);
+                            if (!signature.resolvedReturnType) {
+                                signature.resolvedReturnType = returnType;
+                            }
+                        }
+                    }
+                    if (!contextChecked) {
+                        checkSignatureDeclaration(node);
+                        checkNodeDeferred(node);
+                    }
+                }
+            }
+            if (produceDiagnostics && node.kind !== 147 && node.kind !== 146) {
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+            }
+            return type;
+        }
+        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
+            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
+            var isAsync = ts.isAsyncFunctionLike(node);
+            var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
+            if (!node.asteriskToken) {
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (node.body) {
+                if (!node.type) {
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+                }
+                if (node.body.kind === 199) {
+                    checkSourceElement(node.body);
+                }
+                else {
+                    var exprType = checkExpression(node.body);
+                    if (returnOrPromisedType) {
+                        if (isAsync) {
+                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member);
+                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
+                        }
+                    }
+                }
+            }
+        }
+        function checkArithmeticOperandType(operand, type, diagnostic) {
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 132)) {
+                error(operand, diagnostic);
+                return false;
+            }
+            return true;
+        }
+        function isReadonlySymbol(symbol) {
+            return symbol.flags & 4 && (getDeclarationFlagsFromSymbol(symbol) & 64) !== 0 ||
+                symbol.flags & 3 && (getDeclarationFlagsFromSymbol(symbol) & 2048) !== 0 ||
+                symbol.flags & 98304 && !(symbol.flags & 65536) ||
+                (symbol.flags & 8) !== 0;
+        }
+        function isReferenceToReadonlyEntity(expr, symbol) {
+            if (isReadonlySymbol(symbol)) {
+                if (symbol.flags & 4 &&
+                    (expr.kind === 172 || expr.kind === 173) &&
+                    expr.expression.kind === 97) {
+                    var func = ts.getContainingFunction(expr);
+                    if (!(func && func.kind === 148))
+                        return true;
+                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
+                }
+                return true;
+            }
+            return false;
+        }
+        function isReferenceThroughNamespaceImport(expr) {
+            if (expr.kind === 172 || expr.kind === 173) {
+                var node = skipParenthesizedNodes(expr.expression);
+                if (node.kind === 69) {
+                    var symbol = getNodeLinks(node).resolvedSymbol;
+                    if (symbol.flags & 8388608) {
+                        var declaration = getDeclarationOfAliasSymbol(symbol);
+                        return declaration && declaration.kind === 232;
+                    }
+                }
+            }
+            return false;
+        }
+        function checkReferenceExpression(expr, invalidReferenceMessage, constantVariableMessage) {
+            var node = skipParenthesizedNodes(expr);
+            if (node.kind !== 69 && node.kind !== 172 && node.kind !== 173) {
+                error(expr, invalidReferenceMessage);
+                return false;
+            }
+            var links = getNodeLinks(node);
+            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
+            if (symbol) {
+                if (symbol !== unknownSymbol && symbol !== argumentsSymbol) {
+                    if (node.kind === 69 && !(symbol.flags & 3)) {
+                        error(expr, invalidReferenceMessage);
+                        return false;
+                    }
+                    if (isReferenceToReadonlyEntity(node, symbol) || isReferenceThroughNamespaceImport(node)) {
+                        error(expr, constantVariableMessage);
+                        return false;
+                    }
+                }
+            }
+            else if (node.kind === 173) {
+                if (links.resolvedIndexInfo && links.resolvedIndexInfo.isReadonly) {
+                    error(expr, constantVariableMessage);
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkDeleteExpression(node) {
+            checkExpression(node.expression);
+            return booleanType;
+        }
+        function checkTypeOfExpression(node) {
+            checkExpression(node.expression);
+            return stringType;
+        }
+        function checkVoidExpression(node) {
+            checkExpression(node.expression);
+            return undefinedWideningType;
+        }
+        function checkAwaitExpression(node) {
+            if (produceDiagnostics) {
+                if (!(node.flags & 33554432)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
+                }
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
+                }
+            }
+            var operandType = checkExpression(node.expression);
+            return checkAwaitedType(operandType, node);
+        }
+        function checkPrefixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            switch (node.operator) {
+                case 35:
+                case 36:
+                case 50:
+                    if (maybeTypeOfKind(operandType, 16777216)) {
+                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
+                    }
+                    return numberType;
+                case 49:
+                    return booleanType;
+                case 41:
+                case 42:
+                    var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+                    if (ok) {
+                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+                    }
+                    return numberType;
+            }
+            return unknownType;
+        }
+        function checkPostfixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+            if (ok) {
+                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+            }
+            return numberType;
+        }
+        function maybeTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
+            }
+            if (type.flags & 49152) {
+                var types = type.types;
+                for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
+                    var t = types_10[_i];
+                    if (maybeTypeOfKind(t, kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
+            }
+            if (type.flags & 16384) {
+                var types = type.types;
+                for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
+                    var t = types_11[_i];
+                    if (!isTypeOfKind(t, kind)) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            if (type.flags & 32768) {
+                var types = type.types;
+                for (var _a = 0, types_12 = types; _a < types_12.length; _a++) {
+                    var t = types_12[_a];
+                    if (isTypeOfKind(t, kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isConstEnumObjectType(type) {
+            return type.flags & (80896 | 65536) && type.symbol && isConstEnumSymbol(type.symbol);
+        }
+        function isConstEnumSymbol(symbol) {
+            return (symbol.flags & 128) !== 0;
+        }
+        function checkInstanceOfExpression(left, right, leftType, rightType) {
+            if (isTypeOfKind(leftType, 16777726)) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            if (!(isTypeAny(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
+            }
+            return booleanType;
+        }
+        function checkInExpression(left, right, leftType, rightType) {
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 | 132 | 16777216)) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
+            }
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 | 512)) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            return booleanType;
+        }
+        function checkObjectLiteralAssignment(node, sourceType, contextualMapper) {
+            var properties = node.properties;
+            for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
+                var p = properties_3[_i];
+                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, contextualMapper);
+            }
+            return sourceType;
+        }
+        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, contextualMapper) {
+            if (property.kind === 253 || property.kind === 254) {
+                var name_14 = property.name;
+                if (name_14.kind === 140) {
+                    checkComputedPropertyName(name_14);
+                }
+                if (isComputedNonLiteralName(name_14)) {
+                    return undefined;
+                }
+                var text = getTextOfPropertyName(name_14);
+                var type = isTypeAny(objectLiteralType)
+                    ? objectLiteralType
+                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
+                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1) ||
+                        getIndexTypeOfType(objectLiteralType, 0);
+                if (type) {
+                    if (property.kind === 254) {
+                        return checkDestructuringAssignment(property, type);
+                    }
+                    else {
+                        return checkDestructuringAssignment(property.initializer, type);
+                    }
+                }
+                else {
+                    error(name_14, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_14));
+                }
+            }
+            else {
+                error(property, ts.Diagnostics.Property_assignment_expected);
+            }
+        }
+        function checkArrayLiteralAssignment(node, sourceType, contextualMapper) {
+            var elementType = checkIteratedTypeOrElementType(sourceType, node, false) || unknownType;
+            var elements = node.elements;
+            for (var i = 0; i < elements.length; i++) {
+                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, contextualMapper);
+            }
+            return sourceType;
+        }
+        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, contextualMapper) {
+            var elements = node.elements;
+            var element = elements[elementIndex];
+            if (element.kind !== 193) {
+                if (element.kind !== 191) {
+                    var propName = "" + elementIndex;
+                    var type = isTypeAny(sourceType)
+                        ? sourceType
+                        : isTupleLikeType(sourceType)
+                            ? getTypeOfPropertyOfType(sourceType, propName)
+                            : elementType;
+                    if (type) {
+                        return checkDestructuringAssignment(element, type, contextualMapper);
+                    }
+                    else {
+                        if (isTupleType(sourceType)) {
+                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), sourceType.elementTypes.length, elements.length);
+                        }
+                        else {
+                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
+                        }
+                    }
+                }
+                else {
+                    if (elementIndex < elements.length - 1) {
+                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                    }
+                    else {
+                        var restExpression = element.expression;
+                        if (restExpression.kind === 187 && restExpression.operatorToken.kind === 56) {
+                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                        }
+                        else {
+                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), contextualMapper);
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function checkDestructuringAssignment(exprOrAssignment, sourceType, contextualMapper) {
+            var target;
+            if (exprOrAssignment.kind === 254) {
+                var prop = exprOrAssignment;
+                if (prop.objectAssignmentInitializer) {
+                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, contextualMapper);
+                }
+                target = exprOrAssignment.name;
+            }
+            else {
+                target = exprOrAssignment;
+            }
+            if (target.kind === 187 && target.operatorToken.kind === 56) {
+                checkBinaryExpression(target, contextualMapper);
+                target = target.left;
+            }
+            if (target.kind === 171) {
+                return checkObjectLiteralAssignment(target, sourceType, contextualMapper);
+            }
+            if (target.kind === 170) {
+                return checkArrayLiteralAssignment(target, sourceType, contextualMapper);
+            }
+            return checkReferenceAssignment(target, sourceType, contextualMapper);
+        }
+        function checkReferenceAssignment(target, sourceType, contextualMapper) {
+            var targetType = checkExpression(target, contextualMapper);
+            if (checkReferenceExpression(target, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property)) {
+                checkTypeAssignableTo(sourceType, targetType, target, undefined);
+            }
+            return sourceType;
+        }
+        function isTypeEqualityComparableTo(source, target) {
+            return (target.flags & 96) !== 0 || isTypeComparableTo(source, target);
+        }
+        function checkBinaryExpression(node, contextualMapper) {
+            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, contextualMapper, node);
+        }
+        function checkBinaryLikeExpression(left, operatorToken, right, contextualMapper, errorNode) {
+            var operator = operatorToken.kind;
+            if (operator === 56 && (left.kind === 171 || left.kind === 170)) {
+                return checkDestructuringAssignment(left, checkExpression(right, contextualMapper), contextualMapper);
+            }
+            var leftType = checkExpression(left, contextualMapper);
+            var rightType = checkExpression(right, contextualMapper);
+            switch (operator) {
+                case 37:
+                case 38:
+                case 59:
+                case 60:
+                case 39:
+                case 61:
+                case 40:
+                case 62:
+                case 36:
+                case 58:
+                case 43:
+                case 63:
+                case 44:
+                case 64:
+                case 45:
+                case 65:
+                case 47:
+                case 67:
+                case 48:
+                case 68:
+                case 46:
+                case 66:
+                    if (leftType.flags & 96)
+                        leftType = rightType;
+                    if (rightType.flags & 96)
+                        rightType = leftType;
+                    leftType = getNonNullableType(leftType);
+                    rightType = getNonNullableType(rightType);
+                    var suggestedOperator = void 0;
+                    if ((leftType.flags & 8) &&
+                        (rightType.flags & 8) &&
+                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
+                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
+                    }
+                    else {
+                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        if (leftOk && rightOk) {
+                            checkAssignmentOperator(numberType);
+                        }
+                    }
+                    return numberType;
+                case 35:
+                case 57:
+                    if (leftType.flags & 96)
+                        leftType = rightType;
+                    if (rightType.flags & 96)
+                        rightType = leftType;
+                    leftType = getNonNullableType(leftType);
+                    rightType = getNonNullableType(rightType);
+                    var resultType = void 0;
+                    if (isTypeOfKind(leftType, 132) && isTypeOfKind(rightType, 132)) {
+                        resultType = numberType;
+                    }
+                    else {
+                        if (isTypeOfKind(leftType, 258) || isTypeOfKind(rightType, 258)) {
+                            resultType = stringType;
+                        }
+                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
+                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
+                        }
+                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
+                            return resultType;
+                        }
+                    }
+                    if (!resultType) {
+                        reportOperatorError();
+                        return anyType;
+                    }
+                    if (operator === 57) {
+                        checkAssignmentOperator(resultType);
+                    }
+                    return resultType;
+                case 25:
+                case 27:
+                case 28:
+                case 29:
+                    if (checkForDisallowedESSymbolOperand(operator)) {
+                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
+                            reportOperatorError();
+                        }
+                    }
+                    return booleanType;
+                case 30:
+                case 31:
+                case 32:
+                case 33:
+                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
+                        reportOperatorError();
+                    }
+                    return booleanType;
+                case 91:
+                    return checkInstanceOfExpression(left, right, leftType, rightType);
+                case 90:
+                    return checkInExpression(left, right, leftType, rightType);
+                case 51:
+                    return strictNullChecks ? addTypeKind(rightType, getCombinedTypeFlags(leftType) & 126) : rightType;
+                case 52:
+                    return getUnionType([getNonNullableType(leftType), rightType]);
+                case 56:
+                    checkAssignmentOperator(rightType);
+                    return getRegularTypeOfObjectLiteral(rightType);
+                case 24:
+                    return rightType;
+            }
+            function checkForDisallowedESSymbolOperand(operator) {
+                var offendingSymbolOperand = maybeTypeOfKind(leftType, 16777216) ? left :
+                    maybeTypeOfKind(rightType, 16777216) ? right :
+                        undefined;
+                if (offendingSymbolOperand) {
+                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
+                    return false;
+                }
+                return true;
+            }
+            function getSuggestedBooleanOperator(operator) {
+                switch (operator) {
+                    case 47:
+                    case 67:
+                        return 52;
+                    case 48:
+                    case 68:
+                        return 33;
+                    case 46:
+                    case 66:
+                        return 51;
+                    default:
+                        return undefined;
+                }
+            }
+            function checkAssignmentOperator(valueType) {
+                if (produceDiagnostics && operator >= 56 && operator <= 68) {
+                    var ok = checkReferenceExpression(left, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property);
+                    if (ok) {
+                        checkTypeAssignableTo(valueType, leftType, left, undefined);
+                    }
+                }
+            }
+            function reportOperatorError() {
+                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
+            }
+        }
+        function isYieldExpressionInClass(node) {
+            var current = node;
+            var parent = node.parent;
+            while (parent) {
+                if (ts.isFunctionLike(parent) && current === parent.body) {
+                    return false;
+                }
+                else if (ts.isClassLike(current)) {
+                    return true;
+                }
+                current = parent;
+                parent = parent.parent;
+            }
+            return false;
+        }
+        function checkYieldExpression(node) {
+            if (produceDiagnostics) {
+                if (!(node.flags & 8388608) || isYieldExpressionInClass(node)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
+                }
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
+                }
+            }
+            if (node.expression) {
+                var func = ts.getContainingFunction(node);
+                if (func && func.asteriskToken) {
+                    var expressionType = checkExpressionCached(node.expression, undefined);
+                    var expressionElementType = void 0;
+                    var nodeIsYieldStar = !!node.asteriskToken;
+                    if (nodeIsYieldStar) {
+                        expressionElementType = checkElementTypeOfIterable(expressionType, node.expression);
+                    }
+                    if (func.type) {
+                        var signatureElementType = getElementTypeOfIterableIterator(getTypeFromTypeNode(func.type)) || anyType;
+                        if (nodeIsYieldStar) {
+                            checkTypeAssignableTo(expressionElementType, signatureElementType, node.expression, undefined);
+                        }
+                        else {
+                            checkTypeAssignableTo(expressionType, signatureElementType, node.expression, undefined);
+                        }
+                    }
+                }
+            }
+            return anyType;
+        }
+        function checkConditionalExpression(node, contextualMapper) {
+            checkExpression(node.condition);
+            var type1 = checkExpression(node.whenTrue, contextualMapper);
+            var type2 = checkExpression(node.whenFalse, contextualMapper);
+            return getUnionType([type1, type2]);
+        }
+        function checkStringLiteralExpression(node) {
+            var contextualType = getContextualType(node);
+            if (contextualType && contextualTypeIsStringLiteralType(contextualType)) {
+                return getStringLiteralTypeForText(node.text);
+            }
+            return stringType;
+        }
+        function checkTemplateExpression(node) {
+            ts.forEach(node.templateSpans, function (templateSpan) {
+                checkExpression(templateSpan.expression);
+            });
+            return stringType;
+        }
+        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
+            var saveContextualType = node.contextualType;
+            node.contextualType = contextualType;
+            var result = checkExpression(node, contextualMapper);
+            node.contextualType = saveContextualType;
+            return result;
+        }
+        function checkExpressionCached(node, contextualMapper) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var saveFlowLoopStart = flowLoopStart;
+                flowLoopStart = flowLoopCount;
+                links.resolvedType = checkExpression(node, contextualMapper);
+                flowLoopStart = saveFlowLoopStart;
+            }
+            return links.resolvedType;
+        }
+        function checkPropertyAssignment(node, contextualMapper) {
+            if (node.name.kind === 140) {
+                checkComputedPropertyName(node.name);
+            }
+            return checkExpression(node.initializer, contextualMapper);
+        }
+        function checkObjectLiteralMethod(node, contextualMapper) {
+            checkGrammarMethod(node);
+            if (node.name.kind === 140) {
+                checkComputedPropertyName(node.name);
+            }
+            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
+            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
+        }
+        function instantiateTypeWithSingleGenericCallSignature(node, type, contextualMapper) {
+            if (isInferentialContext(contextualMapper)) {
+                var signature = getSingleCallSignature(type);
+                if (signature && signature.typeParameters) {
+                    var contextualType = getApparentTypeOfContextualType(node);
+                    if (contextualType) {
+                        var contextualSignature = getSingleCallSignature(contextualType);
+                        if (contextualSignature && !contextualSignature.typeParameters) {
+                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper));
+                        }
+                    }
+                }
+            }
+            return type;
+        }
+        function checkExpression(node, contextualMapper) {
+            var type;
+            if (node.kind === 139) {
+                type = checkQualifiedName(node);
+            }
+            else {
+                var uninstantiatedType = checkExpressionWorker(node, contextualMapper);
+                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
+            }
+            if (isConstEnumObjectType(type)) {
+                var ok = (node.parent.kind === 172 && node.parent.expression === node) ||
+                    (node.parent.kind === 173 && node.parent.expression === node) ||
+                    ((node.kind === 69 || node.kind === 139) && isInRightSideOfImportOrExportAssignment(node));
+                if (!ok) {
+                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
+                }
+            }
+            return type;
+        }
+        function checkNumericLiteral(node) {
+            checkGrammarNumericLiteral(node);
+            return numberType;
+        }
+        function checkExpressionWorker(node, contextualMapper) {
+            switch (node.kind) {
+                case 69:
+                    return checkIdentifier(node);
+                case 97:
+                    return checkThisExpression(node);
+                case 95:
+                    return checkSuperExpression(node);
+                case 93:
+                    return nullWideningType;
+                case 99:
+                case 84:
+                    return booleanType;
+                case 8:
+                    return checkNumericLiteral(node);
+                case 189:
+                    return checkTemplateExpression(node);
+                case 9:
+                    return checkStringLiteralExpression(node);
+                case 11:
+                    return stringType;
+                case 10:
+                    return globalRegExpType;
+                case 170:
+                    return checkArrayLiteral(node, contextualMapper);
+                case 171:
+                    return checkObjectLiteral(node, contextualMapper);
+                case 172:
+                    return checkPropertyAccessExpression(node);
+                case 173:
+                    return checkIndexedAccess(node);
+                case 174:
+                case 175:
+                    return checkCallExpression(node);
+                case 176:
+                    return checkTaggedTemplateExpression(node);
+                case 178:
+                    return checkExpression(node.expression, contextualMapper);
+                case 192:
+                    return checkClassExpression(node);
+                case 179:
+                case 180:
+                    return checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
+                case 182:
+                    return checkTypeOfExpression(node);
+                case 177:
+                case 195:
+                    return checkAssertion(node);
+                case 196:
+                    return checkNonNullAssertion(node);
+                case 181:
+                    return checkDeleteExpression(node);
+                case 183:
+                    return checkVoidExpression(node);
+                case 184:
+                    return checkAwaitExpression(node);
+                case 185:
+                    return checkPrefixUnaryExpression(node);
+                case 186:
+                    return checkPostfixUnaryExpression(node);
+                case 187:
+                    return checkBinaryExpression(node, contextualMapper);
+                case 188:
+                    return checkConditionalExpression(node, contextualMapper);
+                case 191:
+                    return checkSpreadElementExpression(node, contextualMapper);
+                case 193:
+                    return undefinedWideningType;
+                case 190:
+                    return checkYieldExpression(node);
+                case 248:
+                    return checkJsxExpression(node);
+                case 241:
+                    return checkJsxElement(node);
+                case 242:
+                    return checkJsxSelfClosingElement(node);
+                case 243:
+                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
+            }
+            return unknownType;
+        }
+        function checkTypeParameter(node) {
+            if (node.expression) {
+                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
+            }
+            checkSourceElement(node.constraint);
+            getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node)));
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
+            }
+        }
+        function checkParameter(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkVariableLikeDeclaration(node);
+            var func = ts.getContainingFunction(node);
+            if (node.flags & 92) {
+                func = ts.getContainingFunction(node);
+                if (!(func.kind === 148 && ts.nodeIsPresent(func.body))) {
+                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
+                }
+            }
+            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
+                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
+            }
+            if (node.name.text === "this") {
+                if (ts.indexOf(func.parameters, node) !== 0) {
+                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
+                }
+                if (func.kind === 148 || func.kind === 152 || func.kind === 157) {
+                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
+                }
+            }
+            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
+                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
+            }
+        }
+        function isSyntacticallyValidGenerator(node) {
+            if (!node.asteriskToken || !node.body) {
+                return false;
+            }
+            return node.kind === 147 ||
+                node.kind === 220 ||
+                node.kind === 179;
+        }
+        function getTypePredicateParameterIndex(parameterList, parameter) {
+            if (parameterList) {
+                for (var i = 0; i < parameterList.length; i++) {
+                    var param = parameterList[i];
+                    if (param.name.kind === 69 &&
+                        param.name.text === parameter.text) {
+                        return i;
+                    }
+                }
+            }
+            return -1;
+        }
+        function checkTypePredicate(node) {
+            var parent = getTypePredicateParent(node);
+            if (!parent) {
+                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
+                return;
+            }
+            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
+            if (!typePredicate) {
+                return;
+            }
+            var parameterName = node.parameterName;
+            if (ts.isThisTypePredicate(typePredicate)) {
+                getTypeFromThisTypeNode(parameterName);
+            }
+            else {
+                if (typePredicate.parameterIndex >= 0) {
+                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
+                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
+                    }
+                    else {
+                        var leadingError = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
+                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, undefined, leadingError);
+                    }
+                }
+                else if (parameterName) {
+                    var hasReportedError = false;
+                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
+                        var name_15 = _a[_i].name;
+                        if (ts.isBindingPattern(name_15) &&
+                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_15, parameterName, typePredicate.parameterName)) {
+                            hasReportedError = true;
+                            break;
+                        }
+                    }
+                    if (!hasReportedError) {
+                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
+                    }
+                }
+            }
+        }
+        function getTypePredicateParent(node) {
+            switch (node.parent.kind) {
+                case 180:
+                case 151:
+                case 220:
+                case 179:
+                case 156:
+                case 147:
+                case 146:
+                    var parent_10 = node.parent;
+                    if (node === parent_10.type) {
+                        return parent_10;
+                    }
+            }
+        }
+        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
+            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
+                var name_16 = _a[_i].name;
+                if (name_16.kind === 69 &&
+                    name_16.text === predicateVariableName) {
+                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
+                    return true;
+                }
+                else if (name_16.kind === 168 ||
+                    name_16.kind === 167) {
+                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_16, predicateVariableNode, predicateVariableName)) {
+                        return true;
+                    }
+                }
+            }
+        }
+        function checkSignatureDeclaration(node) {
+            if (node.kind === 153) {
+                checkGrammarIndexSignature(node);
+            }
+            else if (node.kind === 156 || node.kind === 220 || node.kind === 157 ||
+                node.kind === 151 || node.kind === 148 ||
+                node.kind === 152) {
+                checkGrammarFunctionLikeDeclaration(node);
+            }
+            checkTypeParameters(node.typeParameters);
+            ts.forEach(node.parameters, checkParameter);
+            if (node.type) {
+                checkSourceElement(node.type);
+            }
+            if (produceDiagnostics) {
+                checkCollisionWithArgumentsInGeneratedCode(node);
+                if (compilerOptions.noImplicitAny && !node.type) {
+                    switch (node.kind) {
+                        case 152:
+                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                        case 151:
+                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                    }
+                }
+                if (node.type) {
+                    if (languageVersion >= 2 && isSyntacticallyValidGenerator(node)) {
+                        var returnType = getTypeFromTypeNode(node.type);
+                        if (returnType === voidType) {
+                            error(node.type, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
+                        }
+                        else {
+                            var generatorElementType = getElementTypeOfIterableIterator(returnType) || anyType;
+                            var iterableIteratorInstantiation = createIterableIteratorType(generatorElementType);
+                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, node.type);
+                        }
+                    }
+                    else if (ts.isAsyncFunctionLike(node)) {
+                        checkAsyncFunctionReturnType(node);
+                    }
+                }
+            }
+        }
+        function checkClassForDuplicateDeclarations(node) {
+            var getter = 1, setter = 2, property = getter | setter;
+            var instanceNames = {};
+            var staticNames = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 148) {
+                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                        var param = _c[_b];
+                        if (ts.isParameterPropertyDeclaration(param)) {
+                            addName(instanceNames, param.name, param.name.text, property);
+                        }
+                    }
+                }
+                else {
+                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113; });
+                    var names = static ? staticNames : instanceNames;
+                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
+                    if (memberName) {
+                        switch (member.kind) {
+                            case 149:
+                                addName(names, member.name, memberName, getter);
+                                break;
+                            case 150:
+                                addName(names, member.name, memberName, setter);
+                                break;
+                            case 145:
+                                addName(names, member.name, memberName, property);
+                                break;
+                        }
+                    }
+                }
+            }
+            function addName(names, location, name, meaning) {
+                if (ts.hasProperty(names, name)) {
+                    var prev = names[name];
+                    if (prev & meaning) {
+                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                    }
+                    else {
+                        names[name] = prev | meaning;
+                    }
+                }
+                else {
+                    names[name] = meaning;
+                }
+            }
+        }
+        function checkObjectTypeForDuplicateDeclarations(node) {
+            var names = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind == 144) {
+                    var memberName = void 0;
+                    switch (member.name.kind) {
+                        case 9:
+                        case 8:
+                        case 69:
+                            memberName = member.name.text;
+                            break;
+                        default:
+                            continue;
+                    }
+                    if (ts.hasProperty(names, memberName)) {
+                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                    }
+                    else {
+                        names[memberName] = true;
+                    }
+                }
+            }
+        }
+        function checkTypeForDuplicateIndexSignatures(node) {
+            if (node.kind === 222) {
+                var nodeSymbol = getSymbolOfNode(node);
+                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
+                    return;
+                }
+            }
+            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
+            if (indexSymbol) {
+                var seenNumericIndexer = false;
+                var seenStringIndexer = false;
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var declaration = decl;
+                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
+                        switch (declaration.parameters[0].type.kind) {
+                            case 132:
+                                if (!seenStringIndexer) {
+                                    seenStringIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
+                                }
+                                break;
+                            case 130:
+                                if (!seenNumericIndexer) {
+                                    seenNumericIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
+                                }
+                                break;
+                        }
+                    }
+                }
+            }
+        }
+        function checkPropertyDeclaration(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
+            checkVariableLikeDeclaration(node);
+        }
+        function checkMethodDeclaration(node) {
+            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
+            checkFunctionOrMethodDeclaration(node);
+            if (node.flags & 128 && node.body) {
+                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
+            }
+        }
+        function checkConstructorDeclaration(node) {
+            checkSignatureDeclaration(node);
+            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
+            checkSourceElement(node.body);
+            var symbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
+            if (node === firstDeclaration) {
+                checkFunctionOrConstructorSymbol(symbol);
+            }
+            if (ts.nodeIsMissing(node.body)) {
+                return;
+            }
+            if (!produceDiagnostics) {
+                return;
+            }
+            function containsSuperCallAsComputedPropertyName(n) {
+                return n.name && containsSuperCall(n.name);
+            }
+            function containsSuperCall(n) {
+                if (ts.isSuperCallExpression(n)) {
+                    return true;
+                }
+                else if (ts.isFunctionLike(n)) {
+                    return false;
+                }
+                else if (ts.isClassLike(n)) {
+                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
+                }
+                return ts.forEachChild(n, containsSuperCall);
+            }
+            function markThisReferencesAsErrors(n) {
+                if (n.kind === 97) {
+                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                }
+                else if (n.kind !== 179 && n.kind !== 220) {
+                    ts.forEachChild(n, markThisReferencesAsErrors);
+                }
+            }
+            function isInstancePropertyWithInitializer(n) {
+                return n.kind === 145 &&
+                    !(n.flags & 32) &&
+                    !!n.initializer;
+            }
+            var containingClassDecl = node.parent;
+            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
+                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
+                var superCall = getSuperCallInConstructor(node);
+                if (superCall) {
+                    if (classExtendsNull) {
+                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
+                    }
+                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
+                        ts.forEach(node.parameters, function (p) { return p.flags & 92; });
+                    if (superCallShouldBeFirst) {
+                        var statements = node.body.statements;
+                        var superCallStatement = void 0;
+                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
+                            var statement = statements_2[_i];
+                            if (statement.kind === 202 && ts.isSuperCallExpression(statement.expression)) {
+                                superCallStatement = statement;
+                                break;
+                            }
+                            if (!ts.isPrologueDirective(statement)) {
+                                break;
+                            }
+                        }
+                        if (!superCallStatement) {
+                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
+                        }
+                    }
+                }
+                else if (!classExtendsNull) {
+                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
+                }
+            }
+        }
+        function checkAccessorDeclaration(node) {
+            if (produceDiagnostics) {
+                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
+                checkDecorators(node);
+                checkSignatureDeclaration(node);
+                if (node.kind === 149) {
+                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 32768)) {
+                        if (node.flags & 65536) {
+                            if (compilerOptions.noImplicitReturns) {
+                                error(node.name, ts.Diagnostics.Not_all_code_paths_return_a_value);
+                            }
+                        }
+                        else {
+                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
+                        }
+                    }
+                }
+                if (node.name.kind === 140) {
+                    checkComputedPropertyName(node.name);
+                }
+                if (!ts.hasDynamicName(node)) {
+                    var otherKind = node.kind === 149 ? 150 : 149;
+                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
+                    if (otherAccessor) {
+                        if (((node.flags & 28) !== (otherAccessor.flags & 28))) {
+                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
+                        }
+                        if (((node.flags & 128) !== (otherAccessor.flags & 128))) {
+                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
+                        }
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorThisType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
+                    }
+                }
+                getTypeOfAccessors(getSymbolOfNode(node));
+            }
+            if (node.parent.kind !== 171) {
+                checkSourceElement(node.body);
+            }
+            else {
+                checkNodeDeferred(node);
+            }
+        }
+        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
+            var firstType = getAnnotatedType(first);
+            var secondType = getAnnotatedType(second);
+            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
+                error(first, message);
+            }
+        }
+        function checkAccessorDeferred(node) {
+            checkSourceElement(node.body);
+        }
+        function checkMissingDeclaration(node) {
+            checkDecorators(node);
+        }
+        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
+            var typeArguments;
+            var mapper;
+            var result = true;
+            for (var i = 0; i < typeParameters.length; i++) {
+                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                if (constraint) {
+                    if (!typeArguments) {
+                        typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
+                        mapper = createTypeMapper(typeParameters, typeArguments);
+                    }
+                    var typeArgument = typeArguments[i];
+                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
+                }
+            }
+            return result;
+        }
+        function checkTypeReferenceNode(node) {
+            checkGrammarTypeArguments(node, node.typeArguments);
+            var type = getTypeFromTypeReference(node);
+            if (type !== unknownType && node.typeArguments) {
+                ts.forEach(node.typeArguments, checkSourceElement);
+                if (produceDiagnostics) {
+                    var symbol = getNodeLinks(node).resolvedSymbol;
+                    var typeParameters = symbol.flags & 524288 ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
+                    checkTypeArgumentConstraints(typeParameters, node.typeArguments);
+                }
+            }
+        }
+        function checkTypeQuery(node) {
+            getTypeFromTypeQueryNode(node);
+        }
+        function checkTypeLiteral(node) {
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
+            }
+        }
+        function checkArrayType(node) {
+            checkSourceElement(node.elementType);
+        }
+        function checkTupleType(node) {
+            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
+            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
+                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
+            }
+            ts.forEach(node.elementTypes, checkSourceElement);
+        }
+        function checkUnionOrIntersectionType(node) {
+            ts.forEach(node.types, checkSourceElement);
+        }
+        function isPrivateWithinAmbient(node) {
+            return (node.flags & 8) && ts.isInAmbientContext(node);
+        }
+        function getEffectiveDeclarationFlags(n, flagsToCheck) {
+            var flags = ts.getCombinedNodeFlags(n);
+            if (n.parent.kind !== 222 &&
+                n.parent.kind !== 221 &&
+                n.parent.kind !== 192 &&
+                ts.isInAmbientContext(n)) {
+                if (!(flags & 2)) {
+                    flags |= 1;
+                }
+                flags |= 2;
+            }
+            return flags & flagsToCheck;
+        }
+        function checkFunctionOrConstructorSymbol(symbol) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            function getCanonicalOverload(overloads, implementation) {
+                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
+                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
+            }
+            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
+                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
+                if (someButNotAllOverloadFlags !== 0) {
+                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
+                    ts.forEach(overloads, function (o) {
+                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
+                        if (deviation & 1) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                        }
+                        else if (deviation & 2) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                        }
+                        else if (deviation & (8 | 16)) {
+                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                        }
+                        else if (deviation & 128) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                        }
+                    });
+                }
+            }
+            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
+                if (someHaveQuestionToken !== allHaveQuestionToken) {
+                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
+                    ts.forEach(overloads, function (o) {
+                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
+                        if (deviation) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                        }
+                    });
+                }
+            }
+            var flagsToCheck = 1 | 2 | 8 | 16 | 128;
+            var someNodeFlags = 0;
+            var allNodeFlags = flagsToCheck;
+            var someHaveQuestionToken = false;
+            var allHaveQuestionToken = true;
+            var hasOverloads = false;
+            var bodyDeclaration;
+            var lastSeenNonAmbientDeclaration;
+            var previousDeclaration;
+            var declarations = symbol.declarations;
+            var isConstructor = (symbol.flags & 16384) !== 0;
+            function reportImplementationExpectedError(node) {
+                if (node.name && ts.nodeIsMissing(node.name)) {
+                    return;
+                }
+                var seen = false;
+                var subsequentNode = ts.forEachChild(node.parent, function (c) {
+                    if (seen) {
+                        return c;
+                    }
+                    else {
+                        seen = c === node;
+                    }
+                });
+                if (subsequentNode && subsequentNode.pos === node.end) {
+                    if (subsequentNode.kind === node.kind) {
+                        var errorNode_1 = subsequentNode.name || subsequentNode;
+                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
+                            var reportError = (node.kind === 147 || node.kind === 146) &&
+                                (node.flags & 32) !== (subsequentNode.flags & 32);
+                            if (reportError) {
+                                var diagnostic = node.flags & 32 ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
+                                error(errorNode_1, diagnostic);
+                            }
+                            return;
+                        }
+                        else if (ts.nodeIsPresent(subsequentNode.body)) {
+                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
+                            return;
+                        }
+                    }
+                }
+                var errorNode = node.name || node;
+                if (isConstructor) {
+                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
+                }
+                else {
+                    if (node.flags & 128) {
+                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
+                    }
+                    else {
+                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
+                    }
+                }
+            }
+            var isExportSymbolInsideModule = symbol.parent && symbol.parent.flags & 1536;
+            var duplicateFunctionDeclaration = false;
+            var multipleConstructorImplementation = false;
+            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
+                var current = declarations_4[_i];
+                var node = current;
+                var inAmbientContext = ts.isInAmbientContext(node);
+                var inAmbientContextOrInterface = node.parent.kind === 222 || node.parent.kind === 159 || inAmbientContext;
+                if (inAmbientContextOrInterface) {
+                    previousDeclaration = undefined;
+                }
+                if (node.kind === 220 || node.kind === 147 || node.kind === 146 || node.kind === 148) {
+                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
+                    someNodeFlags |= currentNodeFlags;
+                    allNodeFlags &= currentNodeFlags;
+                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
+                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
+                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
+                        if (isConstructor) {
+                            multipleConstructorImplementation = true;
+                        }
+                        else {
+                            duplicateFunctionDeclaration = true;
+                        }
+                    }
+                    else if (!isExportSymbolInsideModule && previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
+                        reportImplementationExpectedError(previousDeclaration);
+                    }
+                    if (ts.nodeIsPresent(node.body)) {
+                        if (!bodyDeclaration) {
+                            bodyDeclaration = node;
+                        }
+                    }
+                    else {
+                        hasOverloads = true;
+                    }
+                    previousDeclaration = node;
+                    if (!inAmbientContextOrInterface) {
+                        lastSeenNonAmbientDeclaration = node;
+                    }
+                }
+            }
+            if (multipleConstructorImplementation) {
+                ts.forEach(declarations, function (declaration) {
+                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
+                });
+            }
+            if (duplicateFunctionDeclaration) {
+                ts.forEach(declarations, function (declaration) {
+                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
+                });
+            }
+            if (!isExportSymbolInsideModule && lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
+                !(lastSeenNonAmbientDeclaration.flags & 128) && !lastSeenNonAmbientDeclaration.questionToken) {
+                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
+            }
+            if (hasOverloads) {
+                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
+                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
+                if (bodyDeclaration) {
+                    var signatures = getSignaturesOfSymbol(symbol);
+                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
+                    for (var _a = 0, signatures_3 = signatures; _a < signatures_3.length; _a++) {
+                        var signature = signatures_3[_a];
+                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
+                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+        function checkExportsOnMergedDeclarations(node) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            var symbol = node.localSymbol;
+            if (!symbol) {
+                symbol = getSymbolOfNode(node);
+                if (!(symbol.flags & 7340032)) {
+                    return;
+                }
+            }
+            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
+                return;
+            }
+            var exportedDeclarationSpaces = 0;
+            var nonExportedDeclarationSpaces = 0;
+            var defaultExportedDeclarationSpaces = 0;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var d = _a[_i];
+                var declarationSpaces = getDeclarationSpaces(d);
+                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 | 512);
+                if (effectiveDeclarationFlags & 1) {
+                    if (effectiveDeclarationFlags & 512) {
+                        defaultExportedDeclarationSpaces |= declarationSpaces;
+                    }
+                    else {
+                        exportedDeclarationSpaces |= declarationSpaces;
+                    }
+                }
+                else {
+                    nonExportedDeclarationSpaces |= declarationSpaces;
+                }
+            }
+            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
+            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
+                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
+                    var d = _c[_b];
+                    var declarationSpaces = getDeclarationSpaces(d);
+                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
+                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
+                    }
+                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
+                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
+                    }
+                }
+            }
+            function getDeclarationSpaces(d) {
+                switch (d.kind) {
+                    case 222:
+                        return 2097152;
+                    case 225:
+                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0
+                            ? 4194304 | 1048576
+                            : 4194304;
+                    case 221:
+                    case 224:
+                        return 2097152 | 1048576;
+                    case 229:
+                        var result_1 = 0;
+                        var target = resolveAlias(getSymbolOfNode(d));
+                        ts.forEach(target.declarations, function (d) { result_1 |= getDeclarationSpaces(d); });
+                        return result_1;
+                    default:
+                        return 1048576;
+                }
+            }
+        }
+        function checkNonThenableType(type, location, message) {
+            type = getWidenedType(type);
+            if (!isTypeAny(type) && isTypeAssignableTo(type, getGlobalThenableType())) {
+                if (location) {
+                    if (!message) {
+                        message = ts.Diagnostics.Operand_for_await_does_not_have_a_valid_callable_then_member;
+                    }
+                    error(location, message);
+                }
+                return unknownType;
+            }
+            return type;
+        }
+        function getPromisedType(promise) {
+            if (promise.flags & 1) {
+                return undefined;
+            }
+            if ((promise.flags & 4096) && promise.target === tryGetGlobalPromiseType()) {
+                return promise.typeArguments[0];
+            }
+            var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType();
+            if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) {
+                return undefined;
+            }
+            var thenFunction = getTypeOfPropertyOfType(promise, "then");
+            if (thenFunction && (thenFunction.flags & 1)) {
+                return undefined;
+            }
+            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0) : emptyArray;
+            if (thenSignatures.length === 0) {
+                return undefined;
+            }
+            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072);
+            if (onfulfilledParameterType.flags & 1) {
+                return undefined;
+            }
+            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0);
+            if (onfulfilledParameterSignatures.length === 0) {
+                return undefined;
+            }
+            var valueParameterType = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature));
+            return valueParameterType;
+        }
+        function getTypeOfFirstParameterOfSignature(signature) {
+            return getTypeAtPosition(signature, 0);
+        }
+        function getAwaitedType(type) {
+            return checkAwaitedType(type, undefined, undefined);
+        }
+        function checkAwaitedType(type, location, message) {
+            return checkAwaitedTypeWorker(type);
+            function checkAwaitedTypeWorker(type) {
+                if (type.flags & 16384) {
+                    var types = [];
+                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                        var constituentType = _a[_i];
+                        types.push(checkAwaitedTypeWorker(constituentType));
+                    }
+                    return getUnionType(types);
+                }
+                else {
+                    var promisedType = getPromisedType(type);
+                    if (promisedType === undefined) {
+                        return checkNonThenableType(type, location, message);
+                    }
+                    else {
+                        if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
+                            if (location) {
+                                error(location, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method, symbolToString(type.symbol));
+                            }
+                            return unknownType;
+                        }
+                        awaitedTypeStack.push(type.id);
+                        var awaitedType = checkAwaitedTypeWorker(promisedType);
+                        awaitedTypeStack.pop();
+                        return awaitedType;
+                    }
+                }
+            }
+        }
+        function checkCorrectPromiseType(returnType, location) {
+            if (returnType === unknownType) {
+                return unknownType;
+            }
+            var globalPromiseType = getGlobalPromiseType();
+            if (globalPromiseType === emptyGenericType
+                || globalPromiseType === getTargetType(returnType)) {
+                return checkAwaitedType(returnType, location, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+            }
+            error(location, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
+            return unknownType;
+        }
+        function checkAsyncFunctionReturnType(node) {
+            if (languageVersion >= 2) {
+                var returnType = getTypeFromTypeNode(node.type);
+                return checkCorrectPromiseType(returnType, node.type);
+            }
+            var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType();
+            if (globalPromiseConstructorLikeType === emptyObjectType) {
+                return unknownType;
+            }
+            var promiseType = getTypeFromTypeNode(node.type);
+            if (promiseType === unknownType && compilerOptions.isolatedModules) {
+                return unknownType;
+            }
+            var promiseConstructor = getNodeLinks(node.type).resolvedSymbol;
+            if (!promiseConstructor || !symbolIsValue(promiseConstructor)) {
+                var typeName = promiseConstructor
+                    ? symbolToString(promiseConstructor)
+                    : typeToString(promiseType);
+                error(node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName);
+                return unknownType;
+            }
+            checkReturnTypeAnnotationAsExpression(node);
+            var promiseConstructorType = getTypeOfSymbol(promiseConstructor);
+            if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) {
+                return unknownType;
+            }
+            var promiseName = ts.getEntityNameFromTypeNode(node.type);
+            var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName);
+            var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455);
+            if (rootSymbol) {
+                error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor));
+                return unknownType;
+            }
+            return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+        }
+        function checkDecorator(node) {
+            var signature = getResolvedSignature(node);
+            var returnType = getReturnTypeOfSignature(signature);
+            if (returnType.flags & 1) {
+                return;
+            }
+            var expectedReturnType;
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            var errorInfo;
+            switch (node.parent.kind) {
+                case 221:
+                    var classSymbol = getSymbolOfNode(node.parent);
+                    var classConstructorType = getTypeOfSymbol(classSymbol);
+                    expectedReturnType = getUnionType([classConstructorType, voidType]);
+                    break;
+                case 142:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 145:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 147:
+                case 149:
+                case 150:
+                    var methodType = getTypeOfNode(node.parent);
+                    var descriptorType = createTypedPropertyDescriptorType(methodType);
+                    expectedReturnType = getUnionType([descriptorType, voidType]);
+                    break;
+            }
+            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
+        }
+        function checkTypeNodeAsExpression(node) {
+            if (node && node.kind === 155) {
+                var root = getFirstIdentifier(node.typeName);
+                var meaning = root.parent.kind === 155 ? 793056 : 1536;
+                var rootSymbol = resolveName(root, root.text, meaning | 8388608, undefined, undefined);
+                if (rootSymbol && rootSymbol.flags & 8388608) {
+                    var aliasTarget = resolveAlias(rootSymbol);
+                    if (aliasTarget.flags & 107455 && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
+                        markAliasSymbolAsReferenced(rootSymbol);
+                    }
+                }
+            }
+        }
+        function checkTypeAnnotationAsExpression(node) {
+            checkTypeNodeAsExpression(node.type);
+        }
+        function checkReturnTypeAnnotationAsExpression(node) {
+            checkTypeNodeAsExpression(node.type);
+        }
+        function checkParameterTypeAnnotationsAsExpressions(node) {
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                checkTypeAnnotationAsExpression(parameter);
+            }
+        }
+        function checkDecorators(node) {
+            if (!node.decorators) {
+                return;
+            }
+            if (!ts.nodeCanBeDecorated(node)) {
+                return;
+            }
+            if (!compilerOptions.experimentalDecorators) {
+                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
+            }
+            if (compilerOptions.emitDecoratorMetadata) {
+                switch (node.kind) {
+                    case 221:
+                        var constructor = ts.getFirstConstructorWithBody(node);
+                        if (constructor) {
+                            checkParameterTypeAnnotationsAsExpressions(constructor);
+                        }
+                        break;
+                    case 147:
+                    case 149:
+                    case 150:
+                        checkParameterTypeAnnotationsAsExpressions(node);
+                        checkReturnTypeAnnotationAsExpression(node);
+                        break;
+                    case 145:
+                    case 142:
+                        checkTypeAnnotationAsExpression(node);
+                        break;
+                }
+            }
+            ts.forEach(node.decorators, checkDecorator);
+        }
+        function checkFunctionDeclaration(node) {
+            if (produceDiagnostics) {
+                checkFunctionOrMethodDeclaration(node) || checkGrammarForGenerator(node);
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+        }
+        function checkFunctionOrMethodDeclaration(node) {
+            checkDecorators(node);
+            checkSignatureDeclaration(node);
+            var isAsync = ts.isAsyncFunctionLike(node);
+            if (node.name && node.name.kind === 140) {
+                checkComputedPropertyName(node.name);
+            }
+            if (!ts.hasDynamicName(node)) {
+                var symbol = getSymbolOfNode(node);
+                var localSymbol = node.localSymbol || symbol;
+                var firstDeclaration = ts.forEach(localSymbol.declarations, function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
+                    declaration : undefined; });
+                if (node === firstDeclaration) {
+                    checkFunctionOrConstructorSymbol(localSymbol);
+                }
+                if (symbol.parent) {
+                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
+                        checkFunctionOrConstructorSymbol(symbol);
+                    }
+                }
+            }
+            checkSourceElement(node.body);
+            if (!node.asteriskToken) {
+                var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (produceDiagnostics && !node.type) {
+                if (compilerOptions.noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
+                    reportImplicitAnyError(node, anyType);
+                }
+                if (node.asteriskToken && ts.nodeIsPresent(node.body)) {
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+                }
+            }
+        }
+        function checkBlock(node) {
+            if (node.kind === 199) {
+                checkGrammarStatementInAmbientContext(node);
+            }
+            ts.forEach(node.statements, checkSourceElement);
+        }
+        function checkCollisionWithArgumentsInGeneratedCode(node) {
+            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
+                return;
+            }
+            ts.forEach(node.parameters, function (p) {
+                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
+                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
+                }
+            });
+        }
+        function needCollisionCheckForIdentifier(node, identifier, name) {
+            if (!(identifier && identifier.text === name)) {
+                return false;
+            }
+            if (node.kind === 145 ||
+                node.kind === 144 ||
+                node.kind === 147 ||
+                node.kind === 146 ||
+                node.kind === 149 ||
+                node.kind === 150) {
+                return false;
+            }
+            if (ts.isInAmbientContext(node)) {
+                return false;
+            }
+            var root = ts.getRootDeclaration(node);
+            if (root.kind === 142 && ts.nodeIsMissing(root.parent.body)) {
+                return false;
+            }
+            return true;
+        }
+        function checkCollisionWithCapturedThisVariable(node, name) {
+            if (needCollisionCheckForIdentifier(node, name, "_this")) {
+                potentialThisCollisions.push(node);
+            }
+        }
+        function checkIfThisIsCapturedInEnclosingScope(node) {
+            var current = node;
+            while (current) {
+                if (getNodeCheckFlags(current) & 4) {
+                    var isDeclaration_1 = node.kind !== 69;
+                    if (isDeclaration_1) {
+                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                    }
+                    else {
+                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
+                    }
+                    return;
+                }
+                current = current.parent;
+            }
+        }
+        function checkCollisionWithCapturedSuperVariable(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
+                return;
+            }
+            var enclosingClass = ts.getContainingClass(node);
+            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
+                return;
+            }
+            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
+                var isDeclaration_2 = node.kind !== 69;
+                if (isDeclaration_2) {
+                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
+                }
+                else {
+                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
+                }
+            }
+        }
+        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
+                return;
+            }
+            if (node.kind === 225 && ts.getModuleInstanceState(node) !== 1) {
+                return;
+            }
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 256 && ts.isExternalOrCommonJsModule(parent)) {
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            }
+        }
+        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "Promise")) {
+                return;
+            }
+            if (node.kind === 225 && ts.getModuleInstanceState(node) !== 1) {
+                return;
+            }
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 256 && ts.isExternalOrCommonJsModule(parent) && parent.flags & 2097152) {
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            }
+        }
+        function checkVarDeclaredNamesNotShadowed(node) {
+            if ((ts.getCombinedNodeFlags(node) & 3072) !== 0 || ts.isParameterDeclaration(node)) {
+                return;
+            }
+            if (node.kind === 218 && !node.initializer) {
+                return;
+            }
+            var symbol = getSymbolOfNode(node);
+            if (symbol.flags & 1) {
+                var localDeclarationSymbol = resolveName(node, node.name.text, 3, undefined, undefined);
+                if (localDeclarationSymbol &&
+                    localDeclarationSymbol !== symbol &&
+                    localDeclarationSymbol.flags & 2) {
+                    if (getDeclarationFlagsFromSymbol(localDeclarationSymbol) & 3072) {
+                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 219);
+                        var container = varDeclList.parent.kind === 200 && varDeclList.parent.parent
+                            ? varDeclList.parent.parent
+                            : undefined;
+                        var namesShareScope = container &&
+                            (container.kind === 199 && ts.isFunctionLike(container.parent) ||
+                                container.kind === 226 ||
+                                container.kind === 225 ||
+                                container.kind === 256);
+                        if (!namesShareScope) {
+                            var name_17 = symbolToString(localDeclarationSymbol);
+                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_17, name_17);
+                        }
+                    }
+                }
+            }
+        }
+        function checkParameterInitializer(node) {
+            if (ts.getRootDeclaration(node).kind !== 142) {
+                return;
+            }
+            var func = ts.getContainingFunction(node);
+            visit(node.initializer);
+            function visit(n) {
+                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
+                    return;
+                }
+                if (n.kind === 172) {
+                    return visit(n.expression);
+                }
+                else if (n.kind === 69) {
+                    var symbol = resolveName(n, n.text, 107455 | 8388608, undefined, undefined);
+                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
+                        return;
+                    }
+                    if (symbol.valueDeclaration === node) {
+                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
+                        return;
+                    }
+                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (enclosingContainer === func) {
+                        if (symbol.valueDeclaration.kind === 142) {
+                            if (symbol.valueDeclaration.pos < node.pos) {
+                                return;
+                            }
+                            var current = n;
+                            while (current !== node.initializer) {
+                                if (ts.isFunctionLike(current.parent)) {
+                                    return;
+                                }
+                                if (current.parent.kind === 145 &&
+                                    !(current.parent.flags & 32) &&
+                                    ts.isClassLike(current.parent.parent)) {
+                                    return;
+                                }
+                                current = current.parent;
+                            }
+                        }
+                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
+                    }
+                }
+                else {
+                    return ts.forEachChild(n, visit);
+                }
+            }
+        }
+        function checkVariableLikeDeclaration(node) {
+            checkDecorators(node);
+            checkSourceElement(node.type);
+            if (node.name.kind === 140) {
+                checkComputedPropertyName(node.name);
+                if (node.initializer) {
+                    checkExpressionCached(node.initializer);
+                }
+            }
+            if (node.kind === 169) {
+                if (node.propertyName && node.propertyName.kind === 140) {
+                    checkComputedPropertyName(node.propertyName);
+                }
+                var parent_11 = node.parent.parent;
+                var parentType = getTypeForBindingElementParent(parent_11);
+                var name_18 = node.propertyName || node.name;
+                var property = getPropertyOfType(parentType, getTextOfPropertyName(name_18));
+                if (parent_11.initializer && property && getParentOfSymbol(property)) {
+                    checkClassPropertyAccess(parent_11, parent_11.initializer, parentType, property);
+                }
+            }
+            if (ts.isBindingPattern(node.name)) {
+                ts.forEach(node.name.elements, checkSourceElement);
+            }
+            if (node.initializer && ts.getRootDeclaration(node).kind === 142 && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
+                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
+                return;
+            }
+            if (ts.isBindingPattern(node.name)) {
+                if (node.initializer && node.parent.parent.kind !== 207) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, undefined);
+                    checkParameterInitializer(node);
+                }
+                return;
+            }
+            var symbol = getSymbolOfNode(node);
+            var type = getTypeOfVariableOrParameterOrProperty(symbol);
+            if (node === symbol.valueDeclaration) {
+                if (node.initializer && node.parent.parent.kind !== 207) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, undefined);
+                    checkParameterInitializer(node);
+                }
+            }
+            else {
+                var declarationType = getWidenedTypeForVariableLikeDeclaration(node);
+                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
+                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
+                }
+                if (node.initializer) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, undefined);
+                }
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                }
+            }
+            if (node.kind !== 145 && node.kind !== 144) {
+                checkExportsOnMergedDeclarations(node);
+                if (node.kind === 218 || node.kind === 169) {
+                    checkVarDeclaredNamesNotShadowed(node);
+                }
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+        }
+        function areDeclarationFlagsIdentical(left, right) {
+            if ((left.kind === 142 && right.kind === 218) ||
+                (left.kind === 218 && right.kind === 142)) {
+                return true;
+            }
+            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
+                return false;
+            }
+            var interestingFlags = 8 |
+                16 |
+                256 |
+                128 |
+                64 |
+                32;
+            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
+        }
+        function checkVariableDeclaration(node) {
+            checkGrammarVariableDeclaration(node);
+            return checkVariableLikeDeclaration(node);
+        }
+        function checkBindingElement(node) {
+            checkGrammarBindingElement(node);
+            return checkVariableLikeDeclaration(node);
+        }
+        function checkVariableStatement(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
+            ts.forEach(node.declarationList.declarations, checkSourceElement);
+        }
+        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
+            if (node.modifiers && node.parent.kind === 171) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    if (node.modifiers.length > 1) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                }
+                else {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                }
+            }
+        }
+        function checkExpressionStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+        }
+        function checkIfStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.thenStatement);
+            if (node.thenStatement.kind === 201) {
+                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
+            }
+            checkSourceElement(node.elseStatement);
+        }
+        function checkDoStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkSourceElement(node.statement);
+            checkExpression(node.expression);
+        }
+        function checkWhileStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.statement);
+        }
+        function checkForStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.initializer && node.initializer.kind === 219) {
+                    checkGrammarVariableDeclarationList(node.initializer);
+                }
+            }
+            if (node.initializer) {
+                if (node.initializer.kind === 219) {
+                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
+                }
+                else {
+                    checkExpression(node.initializer);
+                }
+            }
+            if (node.condition)
+                checkExpression(node.condition);
+            if (node.incrementor)
+                checkExpression(node.incrementor);
+            checkSourceElement(node.statement);
+        }
+        function checkForOfStatement(node) {
+            checkGrammarForInOrForOfStatement(node);
+            if (node.initializer.kind === 219) {
+                checkForInOrForOfVariableDeclaration(node);
+            }
+            else {
+                var varExpr = node.initializer;
+                var iteratedType = checkRightHandSideOfForOf(node.expression);
+                if (varExpr.kind === 170 || varExpr.kind === 171) {
+                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
+                }
+                else {
+                    var leftType = checkExpression(varExpr);
+                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_of_statement, ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property);
+                    if (iteratedType) {
+                        checkTypeAssignableTo(iteratedType, leftType, varExpr, undefined);
+                    }
+                }
+            }
+            checkSourceElement(node.statement);
+        }
+        function checkForInStatement(node) {
+            checkGrammarForInOrForOfStatement(node);
+            if (node.initializer.kind === 219) {
+                var variable = node.initializer.declarations[0];
+                if (variable && ts.isBindingPattern(variable.name)) {
+                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                }
+                checkForInOrForOfVariableDeclaration(node);
+            }
+            else {
+                var varExpr = node.initializer;
+                var leftType = checkExpression(varExpr);
+                if (varExpr.kind === 170 || varExpr.kind === 171) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                }
+                else if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258)) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
+                }
+                else {
+                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_in_statement, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property);
+                }
+            }
+            var rightType = checkNonNullExpression(node.expression);
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 | 512)) {
+                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            checkSourceElement(node.statement);
+        }
+        function checkForInOrForOfVariableDeclaration(iterationStatement) {
+            var variableDeclarationList = iterationStatement.initializer;
+            if (variableDeclarationList.declarations.length >= 1) {
+                var decl = variableDeclarationList.declarations[0];
+                checkVariableDeclaration(decl);
+            }
+        }
+        function checkRightHandSideOfForOf(rhsExpression) {
+            var expressionType = checkNonNullExpression(rhsExpression);
+            return checkIteratedTypeOrElementType(expressionType, rhsExpression, true);
+        }
+        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput) {
+            if (isTypeAny(inputType)) {
+                return inputType;
+            }
+            if (languageVersion >= 2) {
+                return checkElementTypeOfIterable(inputType, errorNode);
+            }
+            if (allowStringInput) {
+                return checkElementTypeOfArrayOrString(inputType, errorNode);
+            }
+            if (isArrayLikeType(inputType)) {
+                var indexType = getIndexTypeOfType(inputType, 1);
+                if (indexType) {
+                    return indexType;
+                }
+            }
+            if (errorNode) {
+                error(errorNode, ts.Diagnostics.Type_0_is_not_an_array_type, typeToString(inputType));
+            }
+            return unknownType;
+        }
+        function checkElementTypeOfIterable(iterable, errorNode) {
+            var elementType = getElementTypeOfIterable(iterable, errorNode);
+            if (errorNode && elementType) {
+                checkTypeAssignableTo(iterable, createIterableType(elementType), errorNode);
+            }
+            return elementType || anyType;
+        }
+        function getElementTypeOfIterable(type, errorNode) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            var typeAsIterable = type;
+            if (!typeAsIterable.iterableElementType) {
+                if ((type.flags & 4096) && type.target === getGlobalIterableType()) {
+                    typeAsIterable.iterableElementType = type.typeArguments[0];
+                }
+                else {
+                    var iteratorFunction = getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator"));
+                    if (isTypeAny(iteratorFunction)) {
+                        return undefined;
+                    }
+                    var iteratorFunctionSignatures = iteratorFunction ? getSignaturesOfType(iteratorFunction, 0) : emptyArray;
+                    if (iteratorFunctionSignatures.length === 0) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
+                        }
+                        return undefined;
+                    }
+                    typeAsIterable.iterableElementType = getElementTypeOfIterator(getUnionType(ts.map(iteratorFunctionSignatures, getReturnTypeOfSignature)), errorNode);
+                }
+            }
+            return typeAsIterable.iterableElementType;
+        }
+        function getElementTypeOfIterator(type, errorNode) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            var typeAsIterator = type;
+            if (!typeAsIterator.iteratorElementType) {
+                if ((type.flags & 4096) && type.target === getGlobalIteratorType()) {
+                    typeAsIterator.iteratorElementType = type.typeArguments[0];
+                }
+                else {
+                    var iteratorNextFunction = getTypeOfPropertyOfType(type, "next");
+                    if (isTypeAny(iteratorNextFunction)) {
+                        return undefined;
+                    }
+                    var iteratorNextFunctionSignatures = iteratorNextFunction ? getSignaturesOfType(iteratorNextFunction, 0) : emptyArray;
+                    if (iteratorNextFunctionSignatures.length === 0) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.An_iterator_must_have_a_next_method);
+                        }
+                        return undefined;
+                    }
+                    var iteratorNextResult = getUnionType(ts.map(iteratorNextFunctionSignatures, getReturnTypeOfSignature));
+                    if (isTypeAny(iteratorNextResult)) {
+                        return undefined;
+                    }
+                    var iteratorNextValue = getTypeOfPropertyOfType(iteratorNextResult, "value");
+                    if (!iteratorNextValue) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
+                        }
+                        return undefined;
+                    }
+                    typeAsIterator.iteratorElementType = iteratorNextValue;
+                }
+            }
+            return typeAsIterator.iteratorElementType;
+        }
+        function getElementTypeOfIterableIterator(type) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            if ((type.flags & 4096) && type.target === getGlobalIterableIteratorType()) {
+                return type.typeArguments[0];
+            }
+            return getElementTypeOfIterable(type, undefined) ||
+                getElementTypeOfIterator(type, undefined);
+        }
+        function checkElementTypeOfArrayOrString(arrayOrStringType, errorNode) {
+            ts.Debug.assert(languageVersion < 2);
+            var arrayType = arrayOrStringType;
+            if (arrayOrStringType.flags & 16384) {
+                arrayType = getUnionType(ts.filter(arrayOrStringType.types, function (t) { return !(t.flags & 258); }));
+            }
+            else if (arrayOrStringType.flags & 258) {
+                arrayType = neverType;
+            }
+            var hasStringConstituent = arrayOrStringType !== arrayType;
+            var reportedError = false;
+            if (hasStringConstituent) {
+                if (languageVersion < 1) {
+                    error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
+                    reportedError = true;
+                }
+                if (arrayType === neverType) {
+                    return stringType;
+                }
+            }
+            if (!isArrayLikeType(arrayType)) {
+                if (!reportedError) {
+                    var diagnostic = hasStringConstituent
+                        ? ts.Diagnostics.Type_0_is_not_an_array_type
+                        : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
+                    error(errorNode, diagnostic, typeToString(arrayType));
+                }
+                return hasStringConstituent ? stringType : unknownType;
+            }
+            var arrayElementType = getIndexTypeOfType(arrayType, 1) || unknownType;
+            if (hasStringConstituent) {
+                if (arrayElementType.flags & 258) {
+                    return stringType;
+                }
+                return getUnionType([arrayElementType, stringType]);
+            }
+            return arrayElementType;
+        }
+        function checkBreakOrContinueStatement(node) {
+            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
+        }
+        function isGetAccessorWithAnnotatedSetAccessor(node) {
+            return !!(node.kind === 149 && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 150)));
+        }
+        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
+            var unwrappedReturnType = ts.isAsyncFunctionLike(func) ? getPromisedType(returnType) : returnType;
+            return maybeTypeOfKind(unwrappedReturnType, 16 | 1);
+        }
+        function checkReturnStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                var functionBlock = ts.getContainingFunction(node);
+                if (!functionBlock) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
+                }
+            }
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var signature = getSignatureFromDeclaration(func);
+                var returnType = getReturnTypeOfSignature(signature);
+                if (strictNullChecks || node.expression || returnType === neverType) {
+                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
+                    if (func.asteriskToken) {
+                        return;
+                    }
+                    if (func.kind === 150) {
+                        if (node.expression) {
+                            error(node.expression, ts.Diagnostics.Setters_cannot_return_a_value);
+                        }
+                    }
+                    else if (func.kind === 148) {
+                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node.expression)) {
+                            error(node.expression, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
+                        }
+                    }
+                    else if (func.type || isGetAccessorWithAnnotatedSetAccessor(func)) {
+                        if (ts.isAsyncFunctionLike(func)) {
+                            var promisedType = getPromisedType(returnType);
+                            var awaitedType = checkAwaitedType(exprType, node.expression || node, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                            if (promisedType) {
+                                checkTypeAssignableTo(awaitedType, promisedType, node.expression || node);
+                            }
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnType, node.expression || node);
+                        }
+                    }
+                }
+                else if (func.kind !== 148 && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
+                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
+                }
+            }
+        }
+        function checkWithStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.flags & 33554432) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
+                }
+            }
+            checkExpression(node.expression);
+            error(node.expression, ts.Diagnostics.All_symbols_within_a_with_block_will_be_resolved_to_any);
+        }
+        function checkSwitchStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            var firstDefaultClause;
+            var hasDuplicateDefaultClause = false;
+            var expressionType = checkExpression(node.expression);
+            ts.forEach(node.caseBlock.clauses, function (clause) {
+                if (clause.kind === 250 && !hasDuplicateDefaultClause) {
+                    if (firstDefaultClause === undefined) {
+                        firstDefaultClause = clause;
+                    }
+                    else {
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
+                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
+                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
+                        hasDuplicateDefaultClause = true;
+                    }
+                }
+                if (produceDiagnostics && clause.kind === 249) {
+                    var caseClause = clause;
+                    var caseType = checkExpression(caseClause.expression);
+                    if (!isTypeEqualityComparableTo(expressionType, caseType)) {
+                        checkTypeComparableTo(caseType, expressionType, caseClause.expression, undefined);
+                    }
+                }
+                ts.forEach(clause.statements, checkSourceElement);
+            });
+        }
+        function checkLabeledStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                var current = node.parent;
+                while (current) {
+                    if (ts.isFunctionLike(current)) {
+                        break;
+                    }
+                    if (current.kind === 214 && current.label.text === node.label.text) {
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
+                        break;
+                    }
+                    current = current.parent;
+                }
+            }
+            checkSourceElement(node.statement);
+        }
+        function checkThrowStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.expression === undefined) {
+                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
+                }
+            }
+            if (node.expression) {
+                checkExpression(node.expression);
+            }
+        }
+        function checkTryStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkBlock(node.tryBlock);
+            var catchClause = node.catchClause;
+            if (catchClause) {
+                if (catchClause.variableDeclaration) {
+                    if (catchClause.variableDeclaration.name.kind !== 69) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.name, ts.Diagnostics.Catch_clause_variable_name_must_be_an_identifier);
+                    }
+                    else if (catchClause.variableDeclaration.type) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
+                    }
+                    else if (catchClause.variableDeclaration.initializer) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
+                    }
+                    else {
+                        var identifierName = catchClause.variableDeclaration.name.text;
+                        var locals = catchClause.block.locals;
+                        if (locals && ts.hasProperty(locals, identifierName)) {
+                            var localSymbol = locals[identifierName];
+                            if (localSymbol && (localSymbol.flags & 2) !== 0) {
+                                grammarErrorOnNode(localSymbol.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, identifierName);
+                            }
+                        }
+                    }
+                }
+                checkBlock(catchClause.block);
+            }
+            if (node.finallyBlock) {
+                checkBlock(node.finallyBlock);
+            }
+        }
+        function checkIndexConstraints(type) {
+            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1);
+            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0);
+            var stringIndexType = getIndexTypeOfType(type, 0);
+            var numberIndexType = getIndexTypeOfType(type, 1);
+            if (stringIndexType || numberIndexType) {
+                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
+                    var propType = getTypeOfSymbol(prop);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1);
+                });
+                if (type.flags & 1024 && ts.isClassLike(type.symbol.valueDeclaration)) {
+                    var classDeclaration = type.symbol.valueDeclaration;
+                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        if (!(member.flags & 32) && ts.hasDynamicName(member)) {
+                            var propType = getTypeOfSymbol(member.symbol);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1);
+                        }
+                    }
+                }
+            }
+            var errorNode;
+            if (stringIndexType && numberIndexType) {
+                errorNode = declaredNumberIndexer || declaredStringIndexer;
+                if (!errorNode && (type.flags & 2048)) {
+                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0) && getIndexTypeOfType(base, 1); });
+                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
+                }
+            }
+            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
+                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
+            }
+            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
+                if (!indexType) {
+                    return;
+                }
+                if (indexKind === 1 && !isNumericName(prop.valueDeclaration.name)) {
+                    return;
+                }
+                var errorNode;
+                if (prop.valueDeclaration.name.kind === 140 || prop.parent === containingType.symbol) {
+                    errorNode = prop.valueDeclaration;
+                }
+                else if (indexDeclaration) {
+                    errorNode = indexDeclaration;
+                }
+                else if (containingType.flags & 2048) {
+                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
+                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
+                }
+                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
+                    var errorMessage = indexKind === 0
+                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
+                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
+                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
+                }
+            }
+        }
+        function checkTypeNameIsReserved(name, message) {
+            switch (name.text) {
+                case "any":
+                case "number":
+                case "boolean":
+                case "string":
+                case "symbol":
+                case "void":
+                    error(name, message, name.text);
+            }
+        }
+        function checkTypeParameters(typeParameterDeclarations) {
+            if (typeParameterDeclarations) {
+                for (var i = 0, n = typeParameterDeclarations.length; i < n; i++) {
+                    var node = typeParameterDeclarations[i];
+                    checkTypeParameter(node);
+                    if (produceDiagnostics) {
+                        for (var j = 0; j < i; j++) {
+                            if (typeParameterDeclarations[j].symbol === node.symbol) {
+                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        function checkTypeParameterListsIdentical(node, symbol) {
+            if (symbol.declarations.length === 1) {
+                return;
+            }
+            var firstDecl;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 221 || declaration.kind === 222) {
+                    if (!firstDecl) {
+                        firstDecl = declaration;
+                    }
+                    else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) {
+                        error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text);
+                    }
+                }
+            }
+        }
+        function checkClassExpression(node) {
+            checkClassLikeDeclaration(node);
+            checkNodeDeferred(node);
+            return getTypeOfSymbol(getSymbolOfNode(node));
+        }
+        function checkClassExpressionDeferred(node) {
+            ts.forEach(node.members, checkSourceElement);
+        }
+        function checkClassDeclaration(node) {
+            if (!node.name && !(node.flags & 512)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
+            }
+            checkClassLikeDeclaration(node);
+            ts.forEach(node.members, checkSourceElement);
+        }
+        function checkClassLikeDeclaration(node) {
+            checkGrammarClassDeclarationHeritageClauses(node);
+            checkDecorators(node);
+            if (node.name) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+            checkTypeParameters(node.typeParameters);
+            checkExportsOnMergedDeclarations(node);
+            var symbol = getSymbolOfNode(node);
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var typeWithThis = getTypeWithThisArgument(type);
+            var staticType = getTypeOfSymbol(symbol);
+            checkTypeParameterListsIdentical(node, symbol);
+            checkClassForDuplicateDeclarations(node);
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            if (baseTypeNode) {
+                var baseTypes = getBaseTypes(type);
+                if (baseTypes.length && produceDiagnostics) {
+                    var baseType_1 = baseTypes[0];
+                    var staticBaseType = getBaseConstructorTypeOfClass(type);
+                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
+                    checkSourceElement(baseTypeNode.expression);
+                    if (baseTypeNode.typeArguments) {
+                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
+                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments); _i < _a.length; _i++) {
+                            var constructor = _a[_i];
+                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
+                                break;
+                            }
+                        }
+                    }
+                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
+                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
+                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32)) {
+                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
+                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
+                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
+                        }
+                    }
+                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
+                }
+            }
+            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
+            if (implementedTypeNodes) {
+                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
+                    var typeRefNode = implementedTypeNodes_1[_b];
+                    if (!ts.isSupportedExpressionWithTypeArguments(typeRefNode)) {
+                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                    }
+                    checkTypeReferenceNode(typeRefNode);
+                    if (produceDiagnostics) {
+                        var t = getTypeFromTypeNode(typeRefNode);
+                        if (t !== unknownType) {
+                            var declaredType = (t.flags & 4096) ? t.target : t;
+                            if (declaredType.flags & (1024 | 2048)) {
+                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
+                            }
+                            else {
+                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
+                            }
+                        }
+                    }
+                }
+            }
+            if (produceDiagnostics) {
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+            }
+        }
+        function checkBaseTypeAccessibility(type, node) {
+            var signatures = getSignaturesOfType(type, 1);
+            if (signatures.length) {
+                var declaration = signatures[0].declaration;
+                if (declaration && declaration.flags & 8) {
+                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
+                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
+                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, node.expression.text);
+                    }
+                }
+            }
+        }
+        function getTargetSymbol(s) {
+            return s.flags & 16777216 ? getSymbolLinks(s).target : s;
+        }
+        function getClassLikeDeclarationOfSymbol(symbol) {
+            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
+        }
+        function checkKindsOfPropertyMemberOverrides(type, baseType) {
+            var baseProperties = getPropertiesOfObjectType(baseType);
+            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
+                var baseProperty = baseProperties_1[_i];
+                var base = getTargetSymbol(baseProperty);
+                if (base.flags & 134217728) {
+                    continue;
+                }
+                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
+                var baseDeclarationFlags = getDeclarationFlagsFromSymbol(base);
+                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
+                if (derived) {
+                    if (derived === base) {
+                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
+                        if (baseDeclarationFlags & 128 && (!derivedClassDecl || !(derivedClassDecl.flags & 128))) {
+                            if (derivedClassDecl.kind === 192) {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
+                            }
+                            else {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
+                            }
+                        }
+                    }
+                    else {
+                        var derivedDeclarationFlags = getDeclarationFlagsFromSymbol(derived);
+                        if ((baseDeclarationFlags & 8) || (derivedDeclarationFlags & 8)) {
+                            continue;
+                        }
+                        if ((baseDeclarationFlags & 32) !== (derivedDeclarationFlags & 32)) {
+                            continue;
+                        }
+                        if ((base.flags & derived.flags & 8192) || ((base.flags & 98308) && (derived.flags & 98308))) {
+                            continue;
+                        }
+                        var errorMessage = void 0;
+                        if (base.flags & 8192) {
+                            if (derived.flags & 98304) {
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
+                            }
+                            else {
+                                ts.Debug.assert((derived.flags & 4) !== 0);
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
+                            }
+                        }
+                        else if (base.flags & 4) {
+                            ts.Debug.assert((derived.flags & 8192) !== 0);
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
+                        }
+                        else {
+                            ts.Debug.assert((base.flags & 98304) !== 0);
+                            ts.Debug.assert((derived.flags & 8192) !== 0);
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
+                        }
+                        error(derived.valueDeclaration.name, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                    }
+                }
+            }
+        }
+        function isAccessor(kind) {
+            return kind === 149 || kind === 150;
+        }
+        function areTypeParametersIdentical(list1, list2) {
+            if (!list1 && !list2) {
+                return true;
+            }
+            if (!list1 || !list2 || list1.length !== list2.length) {
+                return false;
+            }
+            for (var i = 0, len = list1.length; i < len; i++) {
+                var tp1 = list1[i];
+                var tp2 = list2[i];
+                if (tp1.name.text !== tp2.name.text) {
+                    return false;
+                }
+                if (!tp1.constraint && !tp2.constraint) {
+                    continue;
+                }
+                if (!tp1.constraint || !tp2.constraint) {
+                    return false;
+                }
+                if (!isTypeIdenticalTo(getTypeFromTypeNode(tp1.constraint), getTypeFromTypeNode(tp2.constraint))) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkInheritedPropertiesAreIdentical(type, typeNode) {
+            var baseTypes = getBaseTypes(type);
+            if (baseTypes.length < 2) {
+                return true;
+            }
+            var seen = {};
+            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen[p.name] = { prop: p, containingType: type }; });
+            var ok = true;
+            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
+                var base = baseTypes_2[_i];
+                var properties = getPropertiesOfObjectType(getTypeWithThisArgument(base, type.thisType));
+                for (var _a = 0, properties_4 = properties; _a < properties_4.length; _a++) {
+                    var prop = properties_4[_a];
+                    if (!ts.hasProperty(seen, prop.name)) {
+                        seen[prop.name] = { prop: prop, containingType: base };
+                    }
+                    else {
+                        var existing = seen[prop.name];
+                        var isInheritedProperty = existing.containingType !== type;
+                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
+                            ok = false;
+                            var typeName1 = typeToString(existing.containingType);
+                            var typeName2 = typeToString(base);
+                            var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
+                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
+                        }
+                    }
+                }
+            }
+            return ok;
+        }
+        function checkInterfaceDeclaration(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
+            checkTypeParameters(node.typeParameters);
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                checkTypeParameterListsIdentical(node, symbol);
+                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 222);
+                if (node === firstInterfaceDecl) {
+                    var type = getDeclaredTypeOfSymbol(symbol);
+                    var typeWithThis = getTypeWithThisArgument(type);
+                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
+                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
+                            var baseType = _a[_i];
+                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
+                        }
+                        checkIndexConstraints(type);
+                    }
+                }
+                checkObjectTypeForDuplicateDeclarations(node);
+            }
+            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
+                if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
+                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                }
+                checkTypeReferenceNode(heritageElement);
+            });
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                checkTypeForDuplicateIndexSignatures(node);
+            }
+        }
+        function checkTypeAliasDeclaration(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
+            checkSourceElement(node.type);
+        }
+        function computeEnumMemberValues(node) {
+            var nodeLinks = getNodeLinks(node);
+            if (!(nodeLinks.flags & 16384)) {
+                var enumSymbol = getSymbolOfNode(node);
+                var enumType = getDeclaredTypeOfSymbol(enumSymbol);
+                var autoValue = 0;
+                var ambient = ts.isInAmbientContext(node);
+                var enumIsConst = ts.isConst(node);
+                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                    var member = _a[_i];
+                    if (isComputedNonLiteralName(member.name)) {
+                        error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
+                    }
+                    else {
+                        var text = getTextOfPropertyName(member.name);
+                        if (isNumericLiteralName(text)) {
+                            error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
+                        }
+                    }
+                    var previousEnumMemberIsNonConstant = autoValue === undefined;
+                    var initializer = member.initializer;
+                    if (initializer) {
+                        autoValue = computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient);
+                    }
+                    else if (ambient && !enumIsConst) {
+                        autoValue = undefined;
+                    }
+                    else if (previousEnumMemberIsNonConstant) {
+                        error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
+                    }
+                    if (autoValue !== undefined) {
+                        getNodeLinks(member).enumMemberValue = autoValue;
+                        autoValue++;
+                    }
+                }
+                nodeLinks.flags |= 16384;
+            }
+            function computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient) {
+                var reportError = true;
+                var value = evalConstant(initializer);
+                if (reportError) {
+                    if (value === undefined) {
+                        if (enumIsConst) {
+                            error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
+                        }
+                        else if (ambient) {
+                            error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
+                        }
+                        else {
+                            checkTypeAssignableTo(checkExpression(initializer), enumType, initializer, undefined);
+                        }
+                    }
+                    else if (enumIsConst) {
+                        if (isNaN(value)) {
+                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN);
+                        }
+                        else if (!isFinite(value)) {
+                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
+                        }
+                    }
+                }
+                return value;
+                function evalConstant(e) {
+                    switch (e.kind) {
+                        case 185:
+                            var value_1 = evalConstant(e.operand);
+                            if (value_1 === undefined) {
+                                return undefined;
+                            }
+                            switch (e.operator) {
+                                case 35: return value_1;
+                                case 36: return -value_1;
+                                case 50: return ~value_1;
+                            }
+                            return undefined;
+                        case 187:
+                            var left = evalConstant(e.left);
+                            if (left === undefined) {
+                                return undefined;
+                            }
+                            var right = evalConstant(e.right);
+                            if (right === undefined) {
+                                return undefined;
+                            }
+                            switch (e.operatorToken.kind) {
+                                case 47: return left | right;
+                                case 46: return left & right;
+                                case 44: return left >> right;
+                                case 45: return left >>> right;
+                                case 43: return left << right;
+                                case 48: return left ^ right;
+                                case 37: return left * right;
+                                case 39: return left / right;
+                                case 35: return left + right;
+                                case 36: return left - right;
+                                case 40: return left % right;
+                            }
+                            return undefined;
+                        case 8:
+                            return +e.text;
+                        case 178:
+                            return evalConstant(e.expression);
+                        case 69:
+                        case 173:
+                        case 172:
+                            var member = initializer.parent;
+                            var currentType = getTypeOfSymbol(getSymbolOfNode(member.parent));
+                            var enumType_1;
+                            var propertyName = void 0;
+                            if (e.kind === 69) {
+                                enumType_1 = currentType;
+                                propertyName = e.text;
+                            }
+                            else {
+                                var expression = void 0;
+                                if (e.kind === 173) {
+                                    if (e.argumentExpression === undefined ||
+                                        e.argumentExpression.kind !== 9) {
+                                        return undefined;
+                                    }
+                                    expression = e.expression;
+                                    propertyName = e.argumentExpression.text;
+                                }
+                                else {
+                                    expression = e.expression;
+                                    propertyName = e.name.text;
+                                }
+                                var current = expression;
+                                while (current) {
+                                    if (current.kind === 69) {
+                                        break;
+                                    }
+                                    else if (current.kind === 172) {
+                                        current = current.expression;
+                                    }
+                                    else {
+                                        return undefined;
+                                    }
+                                }
+                                enumType_1 = checkExpression(expression);
+                                if (!(enumType_1.symbol && (enumType_1.symbol.flags & 384))) {
+                                    return undefined;
+                                }
+                            }
+                            if (propertyName === undefined) {
+                                return undefined;
+                            }
+                            var property = getPropertyOfObjectType(enumType_1, propertyName);
+                            if (!property || !(property.flags & 8)) {
+                                return undefined;
+                            }
+                            var propertyDecl = property.valueDeclaration;
+                            if (member === propertyDecl) {
+                                return undefined;
+                            }
+                            if (!isBlockScopedNameDeclaredBeforeUse(propertyDecl, member)) {
+                                reportError = false;
+                                error(e, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
+                                return undefined;
+                            }
+                            return getNodeLinks(propertyDecl).enumMemberValue;
+                    }
+                }
+            }
+        }
+        function checkEnumDeclaration(node) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkExportsOnMergedDeclarations(node);
+            computeEnumMemberValues(node);
+            var enumIsConst = ts.isConst(node);
+            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
+                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
+            }
+            var enumSymbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
+            if (node === firstDeclaration) {
+                if (enumSymbol.declarations.length > 1) {
+                    ts.forEach(enumSymbol.declarations, function (decl) {
+                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
+                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                        }
+                    });
+                }
+                var seenEnumMissingInitialInitializer_1 = false;
+                ts.forEach(enumSymbol.declarations, function (declaration) {
+                    if (declaration.kind !== 224) {
+                        return false;
+                    }
+                    var enumDeclaration = declaration;
+                    if (!enumDeclaration.members.length) {
+                        return false;
+                    }
+                    var firstEnumMember = enumDeclaration.members[0];
+                    if (!firstEnumMember.initializer) {
+                        if (seenEnumMissingInitialInitializer_1) {
+                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
+                        }
+                        else {
+                            seenEnumMissingInitialInitializer_1 = true;
+                        }
+                    }
+                });
+            }
+        }
+        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
+            var declarations = symbol.declarations;
+            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
+                var declaration = declarations_5[_i];
+                if ((declaration.kind === 221 ||
+                    (declaration.kind === 220 && ts.nodeIsPresent(declaration.body))) &&
+                    !ts.isInAmbientContext(declaration)) {
+                    return declaration;
+                }
+            }
+            return undefined;
+        }
+        function inSameLexicalScope(node1, node2) {
+            var container1 = ts.getEnclosingBlockScopeContainer(node1);
+            var container2 = ts.getEnclosingBlockScopeContainer(node2);
+            if (isGlobalSourceFile(container1)) {
+                return isGlobalSourceFile(container2);
+            }
+            else if (isGlobalSourceFile(container2)) {
+                return false;
+            }
+            else {
+                return container1 === container2;
+            }
+        }
+        function checkModuleDeclaration(node) {
+            if (produceDiagnostics) {
+                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
+                var inAmbientContext = ts.isInAmbientContext(node);
+                if (isGlobalAugmentation && !inAmbientContext) {
+                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
+                }
+                var isAmbientExternalModule = ts.isAmbientModule(node);
+                var contextErrorMessage = isAmbientExternalModule
+                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
+                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
+                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
+                    return;
+                }
+                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
+                    if (!inAmbientContext && node.name.kind === 9) {
+                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
+                    }
+                }
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                if (symbol.flags & 512
+                    && symbol.declarations.length > 1
+                    && !inAmbientContext
+                    && ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
+                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
+                    if (firstNonAmbientClassOrFunc) {
+                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
+                        }
+                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
+                        }
+                    }
+                    var mergedClass = ts.getDeclarationOfKind(symbol, 221);
+                    if (mergedClass &&
+                        inSameLexicalScope(node, mergedClass)) {
+                        getNodeLinks(node).flags |= 32768;
+                    }
+                }
+                if (isAmbientExternalModule) {
+                    if (ts.isExternalModuleAugmentation(node)) {
+                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432);
+                        if (checkBody) {
+                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
+                                var statement = _a[_i];
+                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
+                            }
+                        }
+                    }
+                    else if (isGlobalSourceFile(node.parent)) {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
+                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
+                        }
+                    }
+                    else {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else {
+                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
+                        }
+                    }
+                }
+            }
+            checkSourceElement(node.body);
+        }
+        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
+            switch (node.kind) {
+                case 200:
+                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                        var decl = _a[_i];
+                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
+                    }
+                    break;
+                case 235:
+                case 236:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
+                    break;
+                case 229:
+                case 230:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
+                    break;
+                case 169:
+                case 218:
+                    var name_19 = node.name;
+                    if (ts.isBindingPattern(name_19)) {
+                        for (var _b = 0, _c = name_19.elements; _b < _c.length; _b++) {
+                            var el = _c[_b];
+                            checkModuleAugmentationElement(el, isGlobalAugmentation);
+                        }
+                        break;
+                    }
+                case 221:
+                case 224:
+                case 220:
+                case 222:
+                case 225:
+                case 223:
+                    if (isGlobalAugmentation) {
+                        return;
+                    }
+                    var symbol = getSymbolOfNode(node);
+                    if (symbol) {
+                        var reportError = !(symbol.flags & 33554432);
+                        if (!reportError) {
+                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
+                        }
+                    }
+                    break;
+            }
+        }
+        function getFirstIdentifier(node) {
+            while (true) {
+                if (node.kind === 139) {
+                    node = node.left;
+                }
+                else if (node.kind === 172) {
+                    node = node.expression;
+                }
+                else {
+                    break;
+                }
+            }
+            ts.Debug.assert(node.kind === 69);
+            return node;
+        }
+        function checkExternalImportOrExportDeclaration(node) {
+            var moduleName = ts.getExternalModuleName(node);
+            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9) {
+                error(moduleName, ts.Diagnostics.String_literal_expected);
+                return false;
+            }
+            var inAmbientExternalModule = node.parent.kind === 226 && ts.isAmbientModule(node.parent.parent);
+            if (node.parent.kind !== 256 && !inAmbientExternalModule) {
+                error(moduleName, node.kind === 236 ?
+                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
+                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
+                return false;
+            }
+            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
+                if (!isTopLevelInExternalModuleAugmentation(node)) {
+                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkAliasSymbol(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target !== unknownSymbol) {
+                var excludedMeanings = (symbol.flags & (107455 | 1048576) ? 107455 : 0) |
+                    (symbol.flags & 793056 ? 793056 : 0) |
+                    (symbol.flags & 1536 ? 1536 : 0);
+                if (target.flags & excludedMeanings) {
+                    var message = node.kind === 238 ?
+                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
+                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
+                    error(node, message, symbolToString(symbol));
+                }
+            }
+        }
+        function checkImportBinding(node) {
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkAliasSymbol(node);
+        }
+        function checkImportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
+            }
+            if (checkExternalImportOrExportDeclaration(node)) {
+                var importClause = node.importClause;
+                if (importClause) {
+                    if (importClause.name) {
+                        checkImportBinding(importClause);
+                    }
+                    if (importClause.namedBindings) {
+                        if (importClause.namedBindings.kind === 232) {
+                            checkImportBinding(importClause.namedBindings);
+                        }
+                        else {
+                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
+                        }
+                    }
+                }
+            }
+        }
+        function checkImportEqualsDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                return;
+            }
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
+                checkImportBinding(node);
+                if (node.flags & 1) {
+                    markExportAsReferenced(node);
+                }
+                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    var target = resolveAlias(getSymbolOfNode(node));
+                    if (target !== unknownSymbol) {
+                        if (target.flags & 107455) {
+                            var moduleName = getFirstIdentifier(node.moduleReference);
+                            if (!(resolveEntityName(moduleName, 107455 | 1536).flags & 1536)) {
+                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
+                            }
+                        }
+                        if (target.flags & 793056) {
+                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
+                        }
+                    }
+                }
+                else {
+                    if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
+                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
+                    }
+                }
+            }
+        }
+        function checkExportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
+            }
+            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
+                if (node.exportClause) {
+                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
+                    var inAmbientExternalModule = node.parent.kind === 226 && ts.isAmbientModule(node.parent.parent);
+                    if (node.parent.kind !== 256 && !inAmbientExternalModule) {
+                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
+                    }
+                }
+                else {
+                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
+                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
+                    }
+                }
+            }
+        }
+        function checkGrammarModuleElementContext(node, errorMessage) {
+            if (node.parent.kind !== 256 && node.parent.kind !== 226 && node.parent.kind !== 225) {
+                return grammarErrorOnFirstToken(node, errorMessage);
+            }
+        }
+        function checkExportSpecifier(node) {
+            checkAliasSymbol(node);
+            if (!node.parent.parent.moduleSpecifier) {
+                var exportedName = node.propertyName || node.name;
+                var symbol = resolveName(exportedName, exportedName.text, 107455 | 793056 | 1536 | 8388608, undefined, undefined);
+                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
+                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
+                }
+                else {
+                    markExportAsReferenced(node);
+                }
+            }
+        }
+        function checkExportAssignment(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
+                return;
+            }
+            var container = node.parent.kind === 256 ? node.parent : node.parent.parent;
+            if (container.kind === 225 && !ts.isAmbientModule(container)) {
+                error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
+            }
+            if (node.expression.kind === 69) {
+                markExportAsReferenced(node);
+            }
+            else {
+                checkExpressionCached(node.expression);
+            }
+            checkExternalModuleExports(container);
+            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
+                if (modulekind === ts.ModuleKind.ES6) {
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
+                }
+                else if (modulekind === ts.ModuleKind.System) {
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
+                }
+            }
+        }
+        function hasExportedMembers(moduleSymbol) {
+            for (var id in moduleSymbol.exports) {
+                if (id !== "export=") {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkExternalModuleExports(node) {
+            var moduleSymbol = getSymbolOfNode(node);
+            var links = getSymbolLinks(moduleSymbol);
+            if (!links.exportsChecked) {
+                var exportEqualsSymbol = moduleSymbol.exports["export="];
+                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
+                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
+                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
+                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
+                    }
+                }
+                var exports_2 = getExportsOfModule(moduleSymbol);
+                for (var id in exports_2) {
+                    if (id === "__export") {
+                        continue;
+                    }
+                    var _a = exports_2[id], declarations = _a.declarations, flags = _a.flags;
+                    if (flags & (1536 | 64 | 384)) {
+                        continue;
+                    }
+                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
+                    if (flags & 524288 && exportedDeclarationsCount <= 2) {
+                        continue;
+                    }
+                    if (exportedDeclarationsCount > 1) {
+                        for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
+                            var declaration = declarations_6[_i];
+                            if (isNotOverload(declaration)) {
+                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
+                            }
+                        }
+                    }
+                }
+                links.exportsChecked = true;
+            }
+            function isNotOverload(declaration) {
+                return declaration.kind !== 220 || !!declaration.body;
+            }
+        }
+        function checkSourceElement(node) {
+            if (!node) {
+                return;
+            }
+            var kind = node.kind;
+            if (cancellationToken) {
+                switch (kind) {
+                    case 225:
+                    case 221:
+                    case 222:
+                    case 220:
+                        cancellationToken.throwIfCancellationRequested();
+                }
+            }
+            switch (kind) {
+                case 141:
+                    return checkTypeParameter(node);
+                case 142:
+                    return checkParameter(node);
+                case 145:
+                case 144:
+                    return checkPropertyDeclaration(node);
+                case 156:
+                case 157:
+                case 151:
+                case 152:
+                    return checkSignatureDeclaration(node);
+                case 153:
+                    return checkSignatureDeclaration(node);
+                case 147:
+                case 146:
+                    return checkMethodDeclaration(node);
+                case 148:
+                    return checkConstructorDeclaration(node);
+                case 149:
+                case 150:
+                    return checkAccessorDeclaration(node);
+                case 155:
+                    return checkTypeReferenceNode(node);
+                case 154:
+                    return checkTypePredicate(node);
+                case 158:
+                    return checkTypeQuery(node);
+                case 159:
+                    return checkTypeLiteral(node);
+                case 160:
+                    return checkArrayType(node);
+                case 161:
+                    return checkTupleType(node);
+                case 162:
+                case 163:
+                    return checkUnionOrIntersectionType(node);
+                case 164:
+                    return checkSourceElement(node.type);
+                case 220:
+                    return checkFunctionDeclaration(node);
+                case 199:
+                case 226:
+                    return checkBlock(node);
+                case 200:
+                    return checkVariableStatement(node);
+                case 202:
+                    return checkExpressionStatement(node);
+                case 203:
+                    return checkIfStatement(node);
+                case 204:
+                    return checkDoStatement(node);
+                case 205:
+                    return checkWhileStatement(node);
+                case 206:
+                    return checkForStatement(node);
+                case 207:
+                    return checkForInStatement(node);
+                case 208:
+                    return checkForOfStatement(node);
+                case 209:
+                case 210:
+                    return checkBreakOrContinueStatement(node);
+                case 211:
+                    return checkReturnStatement(node);
+                case 212:
+                    return checkWithStatement(node);
+                case 213:
+                    return checkSwitchStatement(node);
+                case 214:
+                    return checkLabeledStatement(node);
+                case 215:
+                    return checkThrowStatement(node);
+                case 216:
+                    return checkTryStatement(node);
+                case 218:
+                    return checkVariableDeclaration(node);
+                case 169:
+                    return checkBindingElement(node);
+                case 221:
+                    return checkClassDeclaration(node);
+                case 222:
+                    return checkInterfaceDeclaration(node);
+                case 223:
+                    return checkTypeAliasDeclaration(node);
+                case 224:
+                    return checkEnumDeclaration(node);
+                case 225:
+                    return checkModuleDeclaration(node);
+                case 230:
+                    return checkImportDeclaration(node);
+                case 229:
+                    return checkImportEqualsDeclaration(node);
+                case 236:
+                    return checkExportDeclaration(node);
+                case 235:
+                    return checkExportAssignment(node);
+                case 201:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 217:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 239:
+                    return checkMissingDeclaration(node);
+            }
+        }
+        function checkNodeDeferred(node) {
+            if (deferredNodes) {
+                deferredNodes.push(node);
+            }
+        }
+        function checkDeferredNodes() {
+            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
+                var node = deferredNodes_1[_i];
+                switch (node.kind) {
+                    case 179:
+                    case 180:
+                    case 147:
+                    case 146:
+                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
+                        break;
+                    case 149:
+                    case 150:
+                        checkAccessorDeferred(node);
+                        break;
+                    case 192:
+                        checkClassExpressionDeferred(node);
+                        break;
+                }
+            }
+        }
+        function checkSourceFile(node) {
+            var start = new Date().getTime();
+            checkSourceFileWorker(node);
+            ts.checkTime += new Date().getTime() - start;
+        }
+        function checkSourceFileWorker(node) {
+            var links = getNodeLinks(node);
+            if (!(links.flags & 1)) {
+                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
+                    return;
+                }
+                checkGrammarSourceFile(node);
+                potentialThisCollisions.length = 0;
+                deferredNodes = [];
+                ts.forEach(node.statements, checkSourceElement);
+                checkDeferredNodes();
+                deferredNodes = undefined;
+                if (ts.isExternalOrCommonJsModule(node)) {
+                    checkExternalModuleExports(node);
+                }
+                if (potentialThisCollisions.length) {
+                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
+                    potentialThisCollisions.length = 0;
+                }
+                links.flags |= 1;
+            }
+        }
+        function getDiagnostics(sourceFile, ct) {
+            try {
+                cancellationToken = ct;
+                return getDiagnosticsWorker(sourceFile);
+            }
+            finally {
+                cancellationToken = undefined;
+            }
+        }
+        function getDiagnosticsWorker(sourceFile) {
+            throwIfNonDiagnosticsProducing();
+            if (sourceFile) {
+                checkSourceFile(sourceFile);
+                return diagnostics.getDiagnostics(sourceFile.fileName);
+            }
+            ts.forEach(host.getSourceFiles(), checkSourceFile);
+            return diagnostics.getDiagnostics();
+        }
+        function getGlobalDiagnostics() {
+            throwIfNonDiagnosticsProducing();
+            return diagnostics.getGlobalDiagnostics();
+        }
+        function throwIfNonDiagnosticsProducing() {
+            if (!produceDiagnostics) {
+                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
+            }
+        }
+        function isInsideWithStatementBody(node) {
+            if (node) {
+                while (node.parent) {
+                    if (node.parent.kind === 212 && node.parent.statement === node) {
+                        return true;
+                    }
+                    node = node.parent;
+                }
+            }
+            return false;
+        }
+        function getSymbolsInScope(location, meaning) {
+            var symbols = {};
+            var memberFlags = 0;
+            if (isInsideWithStatementBody(location)) {
+                return [];
+            }
+            populateSymbols();
+            return symbolsToArray(symbols);
+            function populateSymbols() {
+                while (location) {
+                    if (location.locals && !isGlobalSourceFile(location)) {
+                        copySymbols(location.locals, meaning);
+                    }
+                    switch (location.kind) {
+                        case 256:
+                            if (!ts.isExternalOrCommonJsModule(location)) {
+                                break;
+                            }
+                        case 225:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931);
+                            break;
+                        case 224:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8);
+                            break;
+                        case 192:
+                            var className = location.name;
+                            if (className) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                        case 221:
+                        case 222:
+                            if (!(memberFlags & 32)) {
+                                copySymbols(getSymbolOfNode(location).members, meaning & 793056);
+                            }
+                            break;
+                        case 179:
+                            var funcName = location.name;
+                            if (funcName) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                            break;
+                    }
+                    if (ts.introducesArgumentsExoticObject(location)) {
+                        copySymbol(argumentsSymbol, meaning);
+                    }
+                    memberFlags = location.flags;
+                    location = location.parent;
+                }
+                copySymbols(globals, meaning);
+            }
+            function copySymbol(symbol, meaning) {
+                if (symbol.flags & meaning) {
+                    var id = symbol.name;
+                    if (!ts.hasProperty(symbols, id)) {
+                        symbols[id] = symbol;
+                    }
+                }
+            }
+            function copySymbols(source, meaning) {
+                if (meaning) {
+                    for (var id in source) {
+                        var symbol = source[id];
+                        copySymbol(symbol, meaning);
+                    }
+                }
+            }
+        }
+        function isTypeDeclarationName(name) {
+            return name.kind === 69 &&
+                isTypeDeclaration(name.parent) &&
+                name.parent.name === name;
+        }
+        function isTypeDeclaration(node) {
+            switch (node.kind) {
+                case 141:
+                case 221:
+                case 222:
+                case 223:
+                case 224:
+                    return true;
+            }
+        }
+        function isTypeReferenceIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 139) {
+                node = node.parent;
+            }
+            return node.parent && (node.parent.kind === 155 || node.parent.kind === 267);
+        }
+        function isHeritageClauseElementIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 172) {
+                node = node.parent;
+            }
+            return node.parent && node.parent.kind === 194;
+        }
+        function forEachEnclosingClass(node, callback) {
+            var result;
+            while (true) {
+                node = ts.getContainingClass(node);
+                if (!node)
+                    break;
+                if (result = callback(node))
+                    break;
+            }
+            return result;
+        }
+        function isNodeWithinClass(node, classDeclaration) {
+            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
+        }
+        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
+            while (nodeOnRightSide.parent.kind === 139) {
+                nodeOnRightSide = nodeOnRightSide.parent;
+            }
+            if (nodeOnRightSide.parent.kind === 229) {
+                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            if (nodeOnRightSide.parent.kind === 235) {
+                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            return undefined;
+        }
+        function isInRightSideOfImportOrExportAssignment(node) {
+            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
+        }
+        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
+            if (ts.isDeclarationName(entityName)) {
+                return getSymbolOfNode(entityName.parent);
+            }
+            if (ts.isInJavaScriptFile(entityName) && entityName.parent.kind === 172) {
+                var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
+                switch (specialPropertyAssignmentKind) {
+                    case 1:
+                    case 3:
+                        return getSymbolOfNode(entityName.parent);
+                    case 4:
+                    case 2:
+                        return getSymbolOfNode(entityName.parent.parent);
+                    default:
+                }
+            }
+            if (entityName.parent.kind === 235) {
+                return resolveEntityName(entityName, 107455 | 793056 | 1536 | 8388608);
+            }
+            if (entityName.kind !== 172) {
+                if (isInRightSideOfImportOrExportAssignment(entityName)) {
+                    var importEqualsDeclaration = ts.getAncestor(entityName, 229);
+                    ts.Debug.assert(importEqualsDeclaration !== undefined);
+                    return getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importEqualsDeclaration, true);
+                }
+            }
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            if (isHeritageClauseElementIdentifier(entityName)) {
+                var meaning = 0;
+                if (entityName.parent.kind === 194) {
+                    meaning = 793056;
+                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                        meaning |= 107455;
+                    }
+                }
+                else {
+                    meaning = 1536;
+                }
+                meaning |= 8388608;
+                return resolveEntityName(entityName, meaning);
+            }
+            else if (ts.isExpression(entityName)) {
+                if (ts.nodeIsMissing(entityName)) {
+                    return undefined;
+                }
+                if (entityName.kind === 69) {
+                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
+                        return getIntrinsicTagSymbol(entityName.parent);
+                    }
+                    return resolveEntityName(entityName, 107455, false, true);
+                }
+                else if (entityName.kind === 172) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkPropertyAccessExpression(entityName);
+                    }
+                    return getNodeLinks(entityName).resolvedSymbol;
+                }
+                else if (entityName.kind === 139) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkQualifiedName(entityName);
+                    }
+                    return getNodeLinks(entityName).resolvedSymbol;
+                }
+            }
+            else if (isTypeReferenceIdentifier(entityName)) {
+                var meaning = (entityName.parent.kind === 155 || entityName.parent.kind === 267) ? 793056 : 1536;
+                return resolveEntityName(entityName, meaning, false, true);
+            }
+            else if (entityName.parent.kind === 246) {
+                return getJsxAttributePropertySymbol(entityName.parent);
+            }
+            if (entityName.parent.kind === 154) {
+                return resolveEntityName(entityName, 1);
+            }
+            return undefined;
+        }
+        function getSymbolAtLocation(node) {
+            if (node.kind === 256) {
+                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
+            }
+            if (isInsideWithStatementBody(node)) {
+                return undefined;
+            }
+            if (ts.isDeclarationName(node)) {
+                return getSymbolOfNode(node.parent);
+            }
+            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
+                return getSymbolOfNode(node.parent.parent);
+            }
+            if (node.kind === 69) {
+                if (isInRightSideOfImportOrExportAssignment(node)) {
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                }
+                else if (node.parent.kind === 169 &&
+                    node.parent.parent.kind === 167 &&
+                    node === node.parent.propertyName) {
+                    var typeOfPattern = getTypeOfNode(node.parent.parent);
+                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
+                    if (propertyDeclaration) {
+                        return propertyDeclaration;
+                    }
+                }
+            }
+            switch (node.kind) {
+                case 69:
+                case 172:
+                case 139:
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                case 97:
+                case 95:
+                    var type = ts.isExpression(node) ? checkExpression(node) : getTypeFromTypeNode(node);
+                    return type.symbol;
+                case 165:
+                    return getTypeFromTypeNode(node).symbol;
+                case 121:
+                    var constructorDeclaration = node.parent;
+                    if (constructorDeclaration && constructorDeclaration.kind === 148) {
+                        return constructorDeclaration.parent.symbol;
+                    }
+                    return undefined;
+                case 9:
+                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
+                        ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
+                        ((node.parent.kind === 230 || node.parent.kind === 236) &&
+                            node.parent.moduleSpecifier === node)) {
+                        return resolveExternalModuleName(node, node);
+                    }
+                case 8:
+                    if (node.parent.kind === 173 && node.parent.argumentExpression === node) {
+                        var objectType = checkExpression(node.parent.expression);
+                        if (objectType === unknownType)
+                            return undefined;
+                        var apparentType = getApparentType(objectType);
+                        if (apparentType === unknownType)
+                            return undefined;
+                        return getPropertyOfType(apparentType, node.text);
+                    }
+                    break;
+            }
+            return undefined;
+        }
+        function getShorthandAssignmentValueSymbol(location) {
+            if (location && location.kind === 254) {
+                return resolveEntityName(location.name, 107455 | 8388608);
+            }
+            return undefined;
+        }
+        function getExportSpecifierLocalTargetSymbol(node) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node) :
+                resolveEntityName(node.propertyName || node.name, 107455 | 793056 | 1536 | 8388608);
+        }
+        function getTypeOfNode(node) {
+            if (isInsideWithStatementBody(node)) {
+                return unknownType;
+            }
+            if (ts.isTypeNode(node)) {
+                return getTypeFromTypeNode(node);
+            }
+            if (ts.isExpression(node)) {
+                return getTypeOfExpression(node);
+            }
+            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
+                return getBaseTypes(getDeclaredTypeOfSymbol(getSymbolOfNode(node.parent.parent)))[0];
+            }
+            if (isTypeDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                return getDeclaredTypeOfSymbol(symbol);
+            }
+            if (isTypeDeclarationName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getDeclaredTypeOfSymbol(symbol);
+            }
+            if (ts.isDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(symbol);
+            }
+            if (ts.isDeclarationName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getTypeOfSymbol(symbol);
+            }
+            if (ts.isBindingPattern(node)) {
+                return getTypeForVariableLikeDeclaration(node.parent, true);
+            }
+            if (isInRightSideOfImportOrExportAssignment(node)) {
+                var symbol = getSymbolAtLocation(node);
+                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
+                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
+            }
+            return unknownType;
+        }
+        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
+            ts.Debug.assert(expr.kind === 171 || expr.kind === 170);
+            if (expr.parent.kind === 208) {
+                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
+            }
+            if (expr.parent.kind === 187) {
+                var iteratedType = checkExpression(expr.parent.right);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
+            }
+            if (expr.parent.kind === 253) {
+                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
+                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
+            }
+            ts.Debug.assert(expr.parent.kind === 170);
+            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
+            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, false) || unknownType;
+            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
+        }
+        function getPropertySymbolOfDestructuringAssignment(location) {
+            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
+            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
+        }
+        function getTypeOfExpression(expr) {
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
+                expr = expr.parent;
+            }
+            return checkExpression(expr);
+        }
+        function getParentTypeOfClassElement(node) {
+            var classSymbol = getSymbolOfNode(node.parent);
+            return node.flags & 32
+                ? getTypeOfSymbol(classSymbol)
+                : getDeclaredTypeOfSymbol(classSymbol);
+        }
+        function getAugmentedPropertiesOfType(type) {
+            type = getApparentType(type);
+            var propsByName = createSymbolTable(getPropertiesOfType(type));
+            if (getSignaturesOfType(type, 0).length || getSignaturesOfType(type, 1).length) {
+                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
+                    if (!ts.hasProperty(propsByName, p.name)) {
+                        propsByName[p.name] = p;
+                    }
+                });
+            }
+            return getNamedMembers(propsByName);
+        }
+        function getRootSymbols(symbol) {
+            if (symbol.flags & 268435456) {
+                var symbols_3 = [];
+                var name_20 = symbol.name;
+                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
+                    var symbol = getPropertyOfType(t, name_20);
+                    if (symbol) {
+                        symbols_3.push(symbol);
+                    }
+                });
+                return symbols_3;
+            }
+            else if (symbol.flags & 67108864) {
+                var target = void 0;
+                var next = symbol;
+                while (next = getSymbolLinks(next).target) {
+                    target = next;
+                }
+                if (target) {
+                    return [target];
+                }
+            }
+            return [symbol];
+        }
+        function isArgumentsLocalBinding(node) {
+            return getReferencedValueSymbol(node) === argumentsSymbol;
+        }
+        function moduleExportsSomeValue(moduleReferenceExpression) {
+            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
+            if (!moduleSymbol) {
+                return true;
+            }
+            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
+            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
+            var symbolLinks = getSymbolLinks(moduleSymbol);
+            if (symbolLinks.exportsSomeValue === undefined) {
+                symbolLinks.exportsSomeValue = hasExportAssignment
+                    ? !!(moduleSymbol.flags & 107455)
+                    : ts.forEachValue(getExportsOfModule(moduleSymbol), isValue);
+            }
+            return symbolLinks.exportsSomeValue;
+            function isValue(s) {
+                s = resolveSymbol(s);
+                return s && !!(s.flags & 107455);
+            }
+        }
+        function getReferencedExportContainer(node) {
+            var symbol = getReferencedValueSymbol(node);
+            if (symbol) {
+                if (symbol.flags & 1048576) {
+                    var exportSymbol = getMergedSymbol(symbol.exportSymbol);
+                    if (exportSymbol.flags & 944) {
+                        return undefined;
+                    }
+                    symbol = exportSymbol;
+                }
+                var parentSymbol = getParentOfSymbol(symbol);
+                if (parentSymbol) {
+                    if (parentSymbol.flags & 512 && parentSymbol.valueDeclaration.kind === 256) {
+                        return parentSymbol.valueDeclaration;
+                    }
+                    for (var n = node.parent; n; n = n.parent) {
+                        if ((n.kind === 225 || n.kind === 224) && getSymbolOfNode(n) === parentSymbol) {
+                            return n;
+                        }
+                    }
+                }
+            }
+        }
+        function getReferencedImportDeclaration(node) {
+            var symbol = getReferencedValueSymbol(node);
+            return symbol && symbol.flags & 8388608 ? getDeclarationOfAliasSymbol(symbol) : undefined;
+        }
+        function isSymbolOfDeclarationWithCollidingName(symbol) {
+            if (symbol.flags & 418) {
+                var links = getSymbolLinks(symbol);
+                if (links.isDeclarationWithCollidingName === undefined) {
+                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (ts.isStatementWithLocals(container)) {
+                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
+                        if (!!resolveName(container.parent, symbol.name, 107455, undefined, undefined)) {
+                            links.isDeclarationWithCollidingName = true;
+                        }
+                        else if (nodeLinks_1.flags & 131072) {
+                            var isDeclaredInLoop = nodeLinks_1.flags & 262144;
+                            var inLoopInitializer = ts.isIterationStatement(container, false);
+                            var inLoopBodyBlock = container.kind === 199 && ts.isIterationStatement(container.parent, false);
+                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
+                        }
+                        else {
+                            links.isDeclarationWithCollidingName = false;
+                        }
+                    }
+                }
+                return links.isDeclarationWithCollidingName;
+            }
+            return false;
+        }
+        function getReferencedDeclarationWithCollidingName(node) {
+            var symbol = getReferencedValueSymbol(node);
+            return symbol && isSymbolOfDeclarationWithCollidingName(symbol) ? symbol.valueDeclaration : undefined;
+        }
+        function isDeclarationWithCollidingName(node) {
+            return isSymbolOfDeclarationWithCollidingName(getSymbolOfNode(node));
+        }
+        function isValueAliasDeclaration(node) {
+            switch (node.kind) {
+                case 229:
+                case 231:
+                case 232:
+                case 234:
+                case 238:
+                    return isAliasResolvedToValue(getSymbolOfNode(node));
+                case 236:
+                    var exportClause = node.exportClause;
+                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
+                case 235:
+                    return node.expression && node.expression.kind === 69 ? isAliasResolvedToValue(getSymbolOfNode(node)) : true;
+            }
+            return false;
+        }
+        function isTopLevelValueImportEqualsWithEntityName(node) {
+            if (node.parent.kind !== 256 || !ts.isInternalModuleImportEqualsDeclaration(node)) {
+                return false;
+            }
+            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
+            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
+        }
+        function isAliasResolvedToValue(symbol) {
+            var target = resolveAlias(symbol);
+            if (target === unknownSymbol) {
+                return true;
+            }
+            return target.flags & 107455 &&
+                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
+        }
+        function isConstEnumOrConstEnumOnlyModule(s) {
+            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
+        }
+        function isReferencedAliasDeclaration(node, checkChildren) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                if (getSymbolLinks(symbol).referenced) {
+                    return true;
+                }
+            }
+            if (checkChildren) {
+                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
+            }
+            return false;
+        }
+        function isImplementationOfOverload(node) {
+            if (ts.nodeIsPresent(node.body)) {
+                var symbol = getSymbolOfNode(node);
+                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
+                return signaturesOfSymbol.length > 1 ||
+                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
+            }
+            return false;
+        }
+        function getNodeCheckFlags(node) {
+            return getNodeLinks(node).flags;
+        }
+        function getEnumMemberValue(node) {
+            computeEnumMemberValues(node.parent);
+            return getNodeLinks(node).enumMemberValue;
+        }
+        function getConstantValue(node) {
+            if (node.kind === 255) {
+                return getEnumMemberValue(node);
+            }
+            var symbol = getNodeLinks(node).resolvedSymbol;
+            if (symbol && (symbol.flags & 8)) {
+                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
+                    return getEnumMemberValue(symbol.valueDeclaration);
+                }
+            }
+            return undefined;
+        }
+        function isFunctionType(type) {
+            return type.flags & 80896 && getSignaturesOfType(type, 0).length > 0;
+        }
+        function getTypeReferenceSerializationKind(typeName) {
+            var valueSymbol = resolveEntityName(typeName, 107455, true);
+            var constructorType = valueSymbol ? getTypeOfSymbol(valueSymbol) : undefined;
+            if (constructorType && isConstructorType(constructorType)) {
+                return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
+            }
+            var typeSymbol = resolveEntityName(typeName, 793056, true);
+            if (!typeSymbol) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+            var type = getDeclaredTypeOfSymbol(typeSymbol);
+            if (type === unknownType) {
+                return ts.TypeReferenceSerializationKind.Unknown;
+            }
+            else if (type.flags & 1) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+            else if (isTypeOfKind(type, 16)) {
+                return ts.TypeReferenceSerializationKind.VoidType;
+            }
+            else if (isTypeOfKind(type, 8)) {
+                return ts.TypeReferenceSerializationKind.BooleanType;
+            }
+            else if (isTypeOfKind(type, 132)) {
+                return ts.TypeReferenceSerializationKind.NumberLikeType;
+            }
+            else if (isTypeOfKind(type, 258)) {
+                return ts.TypeReferenceSerializationKind.StringLikeType;
+            }
+            else if (isTypeOfKind(type, 8192)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            }
+            else if (isTypeOfKind(type, 16777216)) {
+                return ts.TypeReferenceSerializationKind.ESSymbolType;
+            }
+            else if (isFunctionType(type)) {
+                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
+            }
+            else if (isArrayType(type)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            }
+            else {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+        }
+        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
+            var symbol = getSymbolOfNode(declaration);
+            var type = symbol && !(symbol.flags & (2048 | 131072))
+                ? getTypeOfSymbol(symbol)
+                : unknownType;
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        }
+        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
+            var signature = getSignatureFromDeclaration(signatureDeclaration);
+            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
+        }
+        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
+            var type = getWidenedType(getTypeOfExpression(expr));
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        }
+        function writeBaseConstructorTypeOfClass(node, enclosingDeclaration, flags, writer) {
+            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(node));
+            resolveBaseTypesOfClass(classType);
+            var baseType = classType.resolvedBaseTypes.length ? classType.resolvedBaseTypes[0] : unknownType;
+            getSymbolDisplayBuilder().buildTypeDisplay(baseType, writer, enclosingDeclaration, flags);
+        }
+        function hasGlobalName(name) {
+            return ts.hasProperty(globals, name);
+        }
+        function getReferencedValueSymbol(reference) {
+            return getNodeLinks(reference).resolvedSymbol ||
+                resolveName(reference, reference.text, 107455 | 1048576 | 8388608, undefined, undefined);
+        }
+        function getReferencedValueDeclaration(reference) {
+            ts.Debug.assert(!ts.nodeIsSynthesized(reference));
+            var symbol = getReferencedValueSymbol(reference);
+            return symbol && getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
+        }
+        function createResolver() {
+            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
+            var fileToDirective;
+            if (resolvedTypeReferenceDirectives) {
+                fileToDirective = ts.createFileMap();
+                for (var key in resolvedTypeReferenceDirectives) {
+                    if (!ts.hasProperty(resolvedTypeReferenceDirectives, key)) {
+                        continue;
+                    }
+                    var resolvedDirective = resolvedTypeReferenceDirectives[key];
+                    if (!resolvedDirective) {
+                        continue;
+                    }
+                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
+                    fileToDirective.set(file.path, key);
+                }
+            }
+            return {
+                getReferencedExportContainer: getReferencedExportContainer,
+                getReferencedImportDeclaration: getReferencedImportDeclaration,
+                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
+                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
+                isValueAliasDeclaration: isValueAliasDeclaration,
+                hasGlobalName: hasGlobalName,
+                isReferencedAliasDeclaration: isReferencedAliasDeclaration,
+                getNodeCheckFlags: getNodeCheckFlags,
+                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
+                isDeclarationVisible: isDeclarationVisible,
+                isImplementationOfOverload: isImplementationOfOverload,
+                writeTypeOfDeclaration: writeTypeOfDeclaration,
+                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
+                writeTypeOfExpression: writeTypeOfExpression,
+                writeBaseConstructorTypeOfClass: writeBaseConstructorTypeOfClass,
+                isSymbolAccessible: isSymbolAccessible,
+                isEntityNameVisible: isEntityNameVisible,
+                getConstantValue: getConstantValue,
+                collectLinkedAliases: collectLinkedAliases,
+                getReferencedValueDeclaration: getReferencedValueDeclaration,
+                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
+                isOptionalParameter: isOptionalParameter,
+                moduleExportsSomeValue: moduleExportsSomeValue,
+                isArgumentsLocalBinding: isArgumentsLocalBinding,
+                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
+                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
+                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol
+            };
+            function getTypeReferenceDirectivesForEntityName(node) {
+                if (!fileToDirective) {
+                    return undefined;
+                }
+                var meaning = (node.kind === 172) || (node.kind === 69 && isInTypeQuery(node))
+                    ? 107455 | 1048576
+                    : 793056 | 1536;
+                var symbol = resolveEntityName(node, meaning, true);
+                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
+            }
+            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
+                if (!fileToDirective) {
+                    return undefined;
+                }
+                if (!isSymbolFromTypeDeclarationFile(symbol)) {
+                    return undefined;
+                }
+                var typeReferenceDirectives;
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    if (decl.symbol && decl.symbol.flags & meaning) {
+                        var file = ts.getSourceFileOfNode(decl);
+                        var typeReferenceDirective = fileToDirective.get(file.path);
+                        if (typeReferenceDirective) {
+                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
+                        }
+                    }
+                }
+                return typeReferenceDirectives;
+            }
+            function isSymbolFromTypeDeclarationFile(symbol) {
+                if (!symbol.declarations) {
+                    return false;
+                }
+                var current = symbol;
+                while (true) {
+                    var parent_12 = getParentOfSymbol(current);
+                    if (parent_12) {
+                        current = parent_12;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                if (current.valueDeclaration && current.valueDeclaration.kind === 256 && current.flags & 512) {
+                    return false;
+                }
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var file = ts.getSourceFileOfNode(decl);
+                    if (fileToDirective.contains(file.path)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+        }
+        function getExternalModuleFileFromDeclaration(declaration) {
+            var specifier = ts.getExternalModuleName(declaration);
+            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, undefined);
+            if (!moduleSymbol) {
+                return undefined;
+            }
+            return ts.getDeclarationOfKind(moduleSymbol, 256);
+        }
+        function initializeTypeChecker() {
+            ts.forEach(host.getSourceFiles(), function (file) {
+                ts.bindSourceFile(file, compilerOptions);
+            });
+            var augmentations;
+            ts.forEach(host.getSourceFiles(), function (file) {
+                if (!ts.isExternalOrCommonJsModule(file)) {
+                    mergeSymbolTable(globals, file.locals);
+                }
+                if (file.patternAmbientModules && file.patternAmbientModules.length) {
+                    patternAmbientModules = ts.concatenate(patternAmbientModules, file.patternAmbientModules);
+                }
+                if (file.moduleAugmentations.length) {
+                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
+                }
+                if (file.symbol && file.symbol.globalExports) {
+                    mergeSymbolTable(globals, file.symbol.globalExports);
+                }
+            });
+            if (augmentations) {
+                for (var _i = 0, augmentations_1 = augmentations; _i < augmentations_1.length; _i++) {
+                    var list = augmentations_1[_i];
+                    for (var _a = 0, list_2 = list; _a < list_2.length; _a++) {
+                        var augmentation = list_2[_a];
+                        mergeModuleAugmentation(augmentation);
+                    }
+                }
+            }
+            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
+            getSymbolLinks(undefinedSymbol).type = undefinedWideningType;
+            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
+            getSymbolLinks(unknownSymbol).type = unknownType;
+            globalArrayType = getGlobalType("Array", 1);
+            globalObjectType = getGlobalType("Object");
+            globalFunctionType = getGlobalType("Function");
+            globalStringType = getGlobalType("String");
+            globalNumberType = getGlobalType("Number");
+            globalBooleanType = getGlobalType("Boolean");
+            globalRegExpType = getGlobalType("RegExp");
+            jsxElementType = getExportedTypeFromNamespace("JSX", JsxNames.Element);
+            getGlobalClassDecoratorType = ts.memoize(function () { return getGlobalType("ClassDecorator"); });
+            getGlobalPropertyDecoratorType = ts.memoize(function () { return getGlobalType("PropertyDecorator"); });
+            getGlobalMethodDecoratorType = ts.memoize(function () { return getGlobalType("MethodDecorator"); });
+            getGlobalParameterDecoratorType = ts.memoize(function () { return getGlobalType("ParameterDecorator"); });
+            getGlobalTypedPropertyDescriptorType = ts.memoize(function () { return getGlobalType("TypedPropertyDescriptor", 1); });
+            getGlobalESSymbolConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Symbol"); });
+            getGlobalPromiseType = ts.memoize(function () { return getGlobalType("Promise", 1); });
+            tryGetGlobalPromiseType = ts.memoize(function () { return getGlobalSymbol("Promise", 793056, undefined) && getGlobalPromiseType(); });
+            getGlobalPromiseLikeType = ts.memoize(function () { return getGlobalType("PromiseLike", 1); });
+            getInstantiatedGlobalPromiseLikeType = ts.memoize(createInstantiatedPromiseLikeType);
+            getGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Promise"); });
+            getGlobalPromiseConstructorLikeType = ts.memoize(function () { return getGlobalType("PromiseConstructorLike"); });
+            getGlobalThenableType = ts.memoize(createThenableType);
+            getGlobalTemplateStringsArrayType = ts.memoize(function () { return getGlobalType("TemplateStringsArray"); });
+            if (languageVersion >= 2) {
+                getGlobalESSymbolType = ts.memoize(function () { return getGlobalType("Symbol"); });
+                getGlobalIterableType = ts.memoize(function () { return getGlobalType("Iterable", 1); });
+                getGlobalIteratorType = ts.memoize(function () { return getGlobalType("Iterator", 1); });
+                getGlobalIterableIteratorType = ts.memoize(function () { return getGlobalType("IterableIterator", 1); });
+            }
+            else {
+                getGlobalESSymbolType = ts.memoize(function () { return emptyObjectType; });
+                getGlobalIterableType = ts.memoize(function () { return emptyGenericType; });
+                getGlobalIteratorType = ts.memoize(function () { return emptyGenericType; });
+                getGlobalIterableIteratorType = ts.memoize(function () { return emptyGenericType; });
+            }
+            anyArrayType = createArrayType(anyType);
+            var symbol = getGlobalSymbol("ReadonlyArray", 793056, undefined);
+            globalReadonlyArrayType = symbol && getTypeOfGlobalSymbol(symbol, 1);
+            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
+        }
+        function createInstantiatedPromiseLikeType() {
+            var promiseLikeType = getGlobalPromiseLikeType();
+            if (promiseLikeType !== emptyGenericType) {
+                return createTypeReference(promiseLikeType, [anyType]);
+            }
+            return emptyObjectType;
+        }
+        function createThenableType() {
+            var thenPropertySymbol = createSymbol(67108864 | 4, "then");
+            getSymbolLinks(thenPropertySymbol).type = globalFunctionType;
+            var thenableType = createObjectType(65536);
+            thenableType.properties = [thenPropertySymbol];
+            thenableType.members = createSymbolTable(thenableType.properties);
+            thenableType.callSignatures = [];
+            thenableType.constructSignatures = [];
+            return thenableType;
+        }
+        function checkGrammarDecorators(node) {
+            if (!node.decorators) {
+                return false;
+            }
+            if (!ts.nodeCanBeDecorated(node)) {
+                if (node.kind === 147 && !ts.nodeIsPresent(node.body)) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
+                }
+                else {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
+                }
+            }
+            else if (node.kind === 149 || node.kind === 150) {
+                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
+                }
+            }
+            return false;
+        }
+        function checkGrammarModifiers(node) {
+            switch (node.kind) {
+                case 149:
+                case 150:
+                case 148:
+                case 145:
+                case 144:
+                case 147:
+                case 146:
+                case 153:
+                case 225:
+                case 230:
+                case 229:
+                case 236:
+                case 235:
+                case 179:
+                case 180:
+                case 142:
+                    break;
+                case 220:
+                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 118) &&
+                        node.parent.kind !== 226 && node.parent.kind !== 256) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                case 221:
+                case 222:
+                case 200:
+                case 223:
+                    if (node.modifiers && node.parent.kind !== 226 && node.parent.kind !== 256) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                case 224:
+                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 74) &&
+                        node.parent.kind !== 226 && node.parent.kind !== 256) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                default:
+                    return false;
+            }
+            if (!node.modifiers) {
+                return;
+            }
+            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
+            var flags = 0;
+            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
+                var modifier = _a[_i];
+                if (modifier.kind !== 128) {
+                    if (node.kind === 144 || node.kind === 146) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
+                    }
+                    if (node.kind === 153) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
+                    }
+                }
+                switch (modifier.kind) {
+                    case 74:
+                        if (node.kind !== 224 && node.parent.kind === 221) {
+                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(74));
+                        }
+                        break;
+                    case 112:
+                    case 111:
+                    case 110:
+                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
+                        if (modifier.kind === 111) {
+                            lastProtected = modifier;
+                        }
+                        else if (modifier.kind === 110) {
+                            lastPrivate = modifier;
+                        }
+                        if (flags & 28) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
+                        }
+                        else if (flags & 32) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
+                        }
+                        else if (flags & 64) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
+                        }
+                        else if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
+                        }
+                        else if (node.parent.kind === 226 || node.parent.kind === 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
+                        }
+                        else if (flags & 128) {
+                            if (modifier.kind === 110) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
+                            }
+                            else {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
+                            }
+                        }
+                        flags |= ts.modifierToFlag(modifier.kind);
+                        break;
+                    case 113:
+                        if (flags & 32) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
+                        }
+                        else if (flags & 64) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
+                        }
+                        else if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
+                        }
+                        else if (node.parent.kind === 226 || node.parent.kind === 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
+                        }
+                        else if (node.kind === 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
+                        }
+                        else if (flags & 128) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                        }
+                        flags |= 32;
+                        lastStatic = modifier;
+                        break;
+                    case 128:
+                        if (flags & 64) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
+                        }
+                        else if (node.kind !== 145 && node.kind !== 144 && node.kind !== 153 && node.kind !== 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
+                        }
+                        flags |= 64;
+                        lastReadonly = modifier;
+                        break;
+                    case 82:
+                        if (flags & 1) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
+                        }
+                        else if (flags & 2) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
+                        }
+                        else if (flags & 128) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
+                        }
+                        else if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
+                        }
+                        else if (node.parent.kind === 221) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
+                        }
+                        else if (node.kind === 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
+                        }
+                        flags |= 1;
+                        break;
+                    case 122:
+                        if (flags & 2) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
+                        }
+                        else if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.parent.kind === 221) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
+                        }
+                        else if (node.kind === 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
+                        }
+                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 226) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
+                        }
+                        flags |= 2;
+                        lastDeclare = modifier;
+                        break;
+                    case 115:
+                        if (flags & 128) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
+                        }
+                        if (node.kind !== 221) {
+                            if (node.kind !== 147 &&
+                                node.kind !== 145 &&
+                                node.kind !== 149 &&
+                                node.kind !== 150) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
+                            }
+                            if (!(node.parent.kind === 221 && node.parent.flags & 128)) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
+                            }
+                            if (flags & 32) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                            }
+                            if (flags & 8) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
+                            }
+                        }
+                        flags |= 128;
+                        break;
+                    case 118:
+                        if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
+                        }
+                        else if (flags & 2 || ts.isInAmbientContext(node.parent)) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.kind === 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
+                        }
+                        flags |= 256;
+                        lastAsync = modifier;
+                        break;
+                }
+            }
+            if (node.kind === 148) {
+                if (flags & 32) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
+                }
+                if (flags & 128) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
+                }
+                else if (flags & 256) {
+                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
+                }
+                else if (flags & 64) {
+                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
+                }
+                return;
+            }
+            else if ((node.kind === 230 || node.kind === 229) && flags & 2) {
+                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
+            }
+            else if (node.kind === 142 && (flags & 92) && ts.isBindingPattern(node.name)) {
+                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_a_binding_pattern);
+            }
+            if (flags & 256) {
+                return checkGrammarAsyncModifier(node, lastAsync);
+            }
+        }
+        function checkGrammarAsyncModifier(node, asyncModifier) {
+            if (languageVersion < 2) {
+                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
+            }
+            switch (node.kind) {
+                case 147:
+                case 220:
+                case 179:
+                case 180:
+                    if (!node.asteriskToken) {
+                        return false;
+                    }
+                    break;
+            }
+            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
+        }
+        function checkGrammarForDisallowedTrailingComma(list) {
+            if (list && list.hasTrailingComma) {
+                var start = list.end - ",".length;
+                var end = list.end;
+                var sourceFile = ts.getSourceFileOfNode(list[0]);
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
+            }
+        }
+        function checkGrammarTypeParameterList(node, typeParameters, file) {
+            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
+                return true;
+            }
+            if (typeParameters && typeParameters.length === 0) {
+                var start = typeParameters.pos - "<".length;
+                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
+                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
+            }
+        }
+        function checkGrammarParameterList(parameters) {
+            var seenOptionalParameter = false;
+            var parameterCount = parameters.length;
+            for (var i = 0; i < parameterCount; i++) {
+                var parameter = parameters[i];
+                if (parameter.dotDotDotToken) {
+                    if (i !== (parameterCount - 1)) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
+                    }
+                    if (ts.isBindingPattern(parameter.name)) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                    }
+                    if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
+                    }
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
+                    }
+                }
+                else if (parameter.questionToken) {
+                    seenOptionalParameter = true;
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
+                    }
+                }
+                else if (seenOptionalParameter && !parameter.initializer) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
+                }
+            }
+        }
+        function checkGrammarFunctionLikeDeclaration(node) {
+            var file = ts.getSourceFileOfNode(node);
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node, node.typeParameters, file) ||
+                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
+        }
+        function checkGrammarArrowFunction(node, file) {
+            if (node.kind === 180) {
+                var arrowFunction = node;
+                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
+                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
+                if (startLine !== endLine) {
+                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
+                }
+            }
+            return false;
+        }
+        function checkGrammarIndexSignatureParameters(node) {
+            var parameter = node.parameters[0];
+            if (node.parameters.length !== 1) {
+                if (parameter) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                }
+                else {
+                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                }
+            }
+            if (parameter.dotDotDotToken) {
+                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
+            }
+            if (parameter.flags & 1023) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
+            }
+            if (parameter.questionToken) {
+                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
+            }
+            if (parameter.initializer) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
+            }
+            if (!parameter.type) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
+            }
+            if (parameter.type.kind !== 132 && parameter.type.kind !== 130) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
+            }
+            if (!node.type) {
+                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
+            }
+        }
+        function checkGrammarIndexSignature(node) {
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
+        }
+        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
+            if (typeArguments && typeArguments.length === 0) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                var start = typeArguments.pos - "<".length;
+                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+            }
+        }
+        function checkGrammarTypeArguments(node, typeArguments) {
+            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
+                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
+        }
+        function checkGrammarForOmittedArgument(node, args) {
+            if (args) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                for (var _i = 0, args_1 = args; _i < args_1.length; _i++) {
+                    var arg = args_1[_i];
+                    if (arg.kind === 193) {
+                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
+                    }
+                }
+            }
+        }
+        function checkGrammarArguments(node, args) {
+            return checkGrammarForOmittedArgument(node, args);
+        }
+        function checkGrammarHeritageClause(node) {
+            var types = node.types;
+            if (checkGrammarForDisallowedTrailingComma(types)) {
+                return true;
+            }
+            if (types && types.length === 0) {
+                var listType = ts.tokenToString(node.token);
+                var sourceFile = ts.getSourceFileOfNode(node);
+                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
+            }
+        }
+        function checkGrammarClassDeclarationHeritageClauses(node) {
+            var seenExtendsClause = false;
+            var seenImplementsClause = false;
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 83) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
+                        }
+                        if (heritageClause.types.length > 1) {
+                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
+                        }
+                        seenExtendsClause = true;
+                    }
+                    else {
+                        ts.Debug.assert(heritageClause.token === 106);
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
+                        }
+                        seenImplementsClause = true;
+                    }
+                    checkGrammarHeritageClause(heritageClause);
+                }
+            }
+        }
+        function checkGrammarInterfaceDeclaration(node) {
+            var seenExtendsClause = false;
+            if (node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 83) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        seenExtendsClause = true;
+                    }
+                    else {
+                        ts.Debug.assert(heritageClause.token === 106);
+                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
+                    }
+                    checkGrammarHeritageClause(heritageClause);
+                }
+            }
+            return false;
+        }
+        function checkGrammarComputedPropertyName(node) {
+            if (node.kind !== 140) {
+                return false;
+            }
+            var computedPropertyName = node;
+            if (computedPropertyName.expression.kind === 187 && computedPropertyName.expression.operatorToken.kind === 24) {
+                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
+            }
+        }
+        function checkGrammarForGenerator(node) {
+            if (node.asteriskToken) {
+                ts.Debug.assert(node.kind === 220 ||
+                    node.kind === 179 ||
+                    node.kind === 147);
+                if (ts.isInAmbientContext(node)) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
+                }
+                if (!node.body) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
+                }
+                if (languageVersion < 2) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
+                }
+            }
+        }
+        function checkGrammarForInvalidQuestionMark(node, questionToken, message) {
+            if (questionToken) {
+                return grammarErrorOnNode(questionToken, message);
+            }
+        }
+        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
+            var seen = {};
+            var Property = 1;
+            var GetAccessor = 2;
+            var SetAccessor = 4;
+            var GetOrSetAccessor = GetAccessor | SetAccessor;
+            var _loop_1 = function(prop) {
+                var name_21 = prop.name;
+                if (prop.kind === 193 ||
+                    name_21.kind === 140) {
+                    checkGrammarComputedPropertyName(name_21);
+                }
+                if (prop.kind === 254 && !inDestructuring && prop.objectAssignmentInitializer) {
+                    return { value: grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment) };
+                }
+                ts.forEach(prop.modifiers, function (mod) {
+                    if (mod.kind !== 118 || prop.kind !== 147) {
+                        grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
+                    }
+                });
+                var currentKind = void 0;
+                if (prop.kind === 253 || prop.kind === 254) {
+                    checkGrammarForInvalidQuestionMark(prop, prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
+                    if (name_21.kind === 8) {
+                        checkGrammarNumericLiteral(name_21);
+                    }
+                    currentKind = Property;
+                }
+                else if (prop.kind === 147) {
+                    currentKind = Property;
+                }
+                else if (prop.kind === 149) {
+                    currentKind = GetAccessor;
+                }
+                else if (prop.kind === 150) {
+                    currentKind = SetAccessor;
+                }
+                else {
+                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
+                }
+                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_21);
+                if (effectiveName === undefined) {
+                    return "continue";
+                }
+                if (!ts.hasProperty(seen, effectiveName)) {
+                    seen[effectiveName] = currentKind;
+                }
+                else {
+                    var existingKind = seen[effectiveName];
+                    if (currentKind === Property && existingKind === Property) {
+                        grammarErrorOnNode(name_21, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_21));
+                    }
+                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
+                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
+                            seen[effectiveName] = currentKind | existingKind;
+                        }
+                        else {
+                            return { value: grammarErrorOnNode(name_21, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
+                        }
+                    }
+                    else {
+                        return { value: grammarErrorOnNode(name_21, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name) };
+                    }
+                }
+            };
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var prop = _a[_i];
+                var state_2 = _loop_1(prop);
+                if (typeof state_2 === "object") return state_2.value;
+            }
+        }
+        function checkGrammarJsxElement(node) {
+            var seen = {};
+            for (var _i = 0, _a = node.attributes; _i < _a.length; _i++) {
+                var attr = _a[_i];
+                if (attr.kind === 247) {
+                    continue;
+                }
+                var jsxAttr = attr;
+                var name_22 = jsxAttr.name;
+                if (!ts.hasProperty(seen, name_22.text)) {
+                    seen[name_22.text] = true;
+                }
+                else {
+                    return grammarErrorOnNode(name_22, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
+                }
+                var initializer = jsxAttr.initializer;
+                if (initializer && initializer.kind === 248 && !initializer.expression) {
+                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
+                }
+            }
+        }
+        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
+            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
+                return true;
+            }
+            if (forInOrOfStatement.initializer.kind === 219) {
+                var variableList = forInOrOfStatement.initializer;
+                if (!checkGrammarVariableDeclarationList(variableList)) {
+                    var declarations = variableList.declarations;
+                    if (!declarations.length) {
+                        return false;
+                    }
+                    if (declarations.length > 1) {
+                        var diagnostic = forInOrOfStatement.kind === 207
+                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
+                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
+                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
+                    }
+                    var firstDeclaration = declarations[0];
+                    if (firstDeclaration.initializer) {
+                        var diagnostic = forInOrOfStatement.kind === 207
+                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
+                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
+                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
+                    }
+                    if (firstDeclaration.type) {
+                        var diagnostic = forInOrOfStatement.kind === 207
+                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
+                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
+                        return grammarErrorOnNode(firstDeclaration, diagnostic);
+                    }
+                }
+            }
+            return false;
+        }
+        function checkGrammarAccessor(accessor) {
+            var kind = accessor.kind;
+            if (languageVersion < 1) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
+            }
+            else if (ts.isInAmbientContext(accessor)) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
+            }
+            else if (accessor.body === undefined && !(accessor.flags & 128)) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+            }
+            else if (accessor.typeParameters) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
+            }
+            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
+                return grammarErrorOnNode(accessor.name, kind === 149 ?
+                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
+                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
+            }
+            else if (kind === 150) {
+                if (accessor.type) {
+                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
+                }
+                else {
+                    var parameter = accessor.parameters[0];
+                    if (parameter.dotDotDotToken) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
+                    }
+                    else if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
+                    }
+                    else if (parameter.initializer) {
+                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
+                    }
+                }
+            }
+        }
+        function doesAccessorHaveCorrectParameterCount(accessor) {
+            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 149 ? 0 : 1);
+        }
+        function getAccessorThisParameter(accessor) {
+            if (accessor.parameters.length === (accessor.kind === 149 ? 1 : 2) &&
+                accessor.parameters[0].name.kind === 69 &&
+                accessor.parameters[0].name.originalKeywordKind === 97) {
+                return accessor.parameters[0];
+            }
+        }
+        function getFunctionLikeThisParameter(func) {
+            if (func.parameters.length &&
+                func.parameters[0].name.kind === 69 &&
+                func.parameters[0].name.originalKeywordKind === 97) {
+                return func.parameters[0];
+            }
+        }
+        function checkGrammarForNonSymbolComputedProperty(node, message) {
+            if (ts.isDynamicName(node)) {
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarMethod(node) {
+            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
+                checkGrammarFunctionLikeDeclaration(node) ||
+                checkGrammarForGenerator(node)) {
+                return true;
+            }
+            if (node.parent.kind === 171) {
+                if (checkGrammarForInvalidQuestionMark(node, node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
+                    return true;
+                }
+                else if (node.body === undefined) {
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+                }
+            }
+            if (ts.isClassLike(node.parent)) {
+                if (ts.isInAmbientContext(node)) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
+                }
+                else if (!node.body) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
+                }
+            }
+            else if (node.parent.kind === 222) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
+            }
+            else if (node.parent.kind === 159) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
+            }
+        }
+        function checkGrammarBreakOrContinueStatement(node) {
+            var current = node;
+            while (current) {
+                if (ts.isFunctionLike(current)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
+                }
+                switch (current.kind) {
+                    case 214:
+                        if (node.label && current.label.text === node.label.text) {
+                            var isMisplacedContinueLabel = node.kind === 209
+                                && !ts.isIterationStatement(current.statement, true);
+                            if (isMisplacedContinueLabel) {
+                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
+                            }
+                            return false;
+                        }
+                        break;
+                    case 213:
+                        if (node.kind === 210 && !node.label) {
+                            return false;
+                        }
+                        break;
+                    default:
+                        if (ts.isIterationStatement(current, false) && !node.label) {
+                            return false;
+                        }
+                        break;
+                }
+                current = current.parent;
+            }
+            if (node.label) {
+                var message = node.kind === 210
+                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+            else {
+                var message = node.kind === 210
+                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarBindingElement(node) {
+            if (node.dotDotDotToken) {
+                var elements = node.parent.elements;
+                if (node !== ts.lastOrUndefined(elements)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                }
+                if (node.name.kind === 168 || node.name.kind === 167) {
+                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                }
+                if (node.initializer) {
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                }
+            }
+        }
+        function checkGrammarVariableDeclaration(node) {
+            if (node.parent.parent.kind !== 207 && node.parent.parent.kind !== 208) {
+                if (ts.isInAmbientContext(node)) {
+                    if (node.initializer) {
+                        var equalsTokenLength = "=".length;
+                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+                    }
+                }
+                else if (!node.initializer) {
+                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
+                    }
+                    if (ts.isConst(node)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
+                    }
+                }
+            }
+            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
+            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
+        }
+        function checkGrammarNameInLetOrConstDeclarations(name) {
+            if (name.kind === 69) {
+                if (name.originalKeywordKind === 108) {
+                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
+                }
+            }
+            else {
+                var elements = name.elements;
+                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
+                    var element = elements_2[_i];
+                    if (element.kind !== 193) {
+                        checkGrammarNameInLetOrConstDeclarations(element.name);
+                    }
+                }
+            }
+        }
+        function checkGrammarVariableDeclarationList(declarationList) {
+            var declarations = declarationList.declarations;
+            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
+                return true;
+            }
+            if (!declarationList.declarations.length) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
+            }
+        }
+        function allowLetAndConstDeclarations(parent) {
+            switch (parent.kind) {
+                case 203:
+                case 204:
+                case 205:
+                case 212:
+                case 206:
+                case 207:
+                case 208:
+                    return false;
+                case 214:
+                    return allowLetAndConstDeclarations(parent.parent);
+            }
+            return true;
+        }
+        function checkGrammarForDisallowedLetOrConstStatement(node) {
+            if (!allowLetAndConstDeclarations(node.parent)) {
+                if (ts.isLet(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
+                }
+                else if (ts.isConst(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
+                }
+            }
+        }
+        function hasParseDiagnostics(sourceFile) {
+            return sourceFile.parseDiagnostics.length > 0;
+        }
+        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function checkGrammarConstructorTypeParameters(node) {
+            if (node.typeParameters) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarConstructorTypeAnnotation(node) {
+            if (node.type) {
+                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarProperty(node) {
+            if (ts.isClassLike(node.parent)) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+            }
+            else if (node.parent.kind === 222) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
+                }
+            }
+            else if (node.parent.kind === 159) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
+                }
+            }
+            if (ts.isInAmbientContext(node) && node.initializer) {
+                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+            }
+        }
+        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
+            if (node.kind === 222 ||
+                node.kind === 223 ||
+                node.kind === 230 ||
+                node.kind === 229 ||
+                node.kind === 236 ||
+                node.kind === 235 ||
+                (node.flags & 2) ||
+                (node.flags & (1 | 512))) {
+                return false;
+            }
+            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
+        }
+        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (ts.isDeclaration(decl) || decl.kind === 200) {
+                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
+                        return true;
+                    }
+                }
+            }
+        }
+        function checkGrammarSourceFile(node) {
+            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
+        }
+        function checkGrammarStatementInAmbientContext(node) {
+            if (ts.isInAmbientContext(node)) {
+                if (isAccessor(node.parent.kind)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
+                }
+                var links = getNodeLinks(node);
+                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
+                }
+                if (node.parent.kind === 199 || node.parent.kind === 226 || node.parent.kind === 256) {
+                    var links_1 = getNodeLinks(node.parent);
+                    if (!links_1.hasReportedStatementInAmbientContext) {
+                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
+                    }
+                }
+                else {
+                }
+            }
+        }
+        function checkGrammarNumericLiteral(node) {
+            if (node.isOctalLiteral && languageVersion >= 1) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
+            }
+        }
+        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span), 0, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        var _a;
+    }
+    ts.createTypeChecker = createTypeChecker;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var nullSourceMapWriter;
+    var defaultLastEncodedSourceMapSpan = {
+        emittedLine: 1,
+        emittedColumn: 1,
+        sourceLine: 1,
+        sourceColumn: 1,
+        sourceIndex: 0
+    };
+    function getNullSourceMapWriter() {
+        if (nullSourceMapWriter === undefined) {
+            nullSourceMapWriter = {
+                getSourceMapData: function () { return undefined; },
+                setSourceFile: function (sourceFile) { },
+                emitStart: function (range) { },
+                emitEnd: function (range, stopOverridingSpan) { },
+                emitPos: function (pos) { },
+                changeEmitSourcePos: function () { },
+                getText: function () { return undefined; },
+                getSourceMappingURL: function () { return undefined; },
+                initialize: function (filePath, sourceMapFilePath, sourceFiles, isBundledEmit) { },
+                reset: function () { }
+            };
+        }
+        return nullSourceMapWriter;
+    }
+    ts.getNullSourceMapWriter = getNullSourceMapWriter;
+    function createSourceMapWriter(host, writer) {
+        var compilerOptions = host.getCompilerOptions();
+        var currentSourceFile;
+        var sourceMapDir;
+        var stopOverridingSpan = false;
+        var modifyLastSourcePos = false;
+        var sourceMapSourceIndex;
+        var lastRecordedSourceMapSpan;
+        var lastEncodedSourceMapSpan;
+        var lastEncodedNameIndex;
+        var sourceMapData;
+        return {
+            getSourceMapData: function () { return sourceMapData; },
+            setSourceFile: setSourceFile,
+            emitPos: emitPos,
+            emitStart: emitStart,
+            emitEnd: emitEnd,
+            changeEmitSourcePos: changeEmitSourcePos,
+            getText: getText,
+            getSourceMappingURL: getSourceMappingURL,
+            initialize: initialize,
+            reset: reset
+        };
+        function initialize(filePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
+            if (sourceMapData) {
+                reset();
+            }
+            currentSourceFile = undefined;
+            sourceMapSourceIndex = -1;
+            lastRecordedSourceMapSpan = undefined;
+            lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
+            lastEncodedNameIndex = 0;
+            sourceMapData = {
+                sourceMapFilePath: sourceMapFilePath,
+                jsSourceMappingURL: !compilerOptions.inlineSourceMap ? ts.getBaseFileName(ts.normalizeSlashes(sourceMapFilePath)) : undefined,
+                sourceMapFile: ts.getBaseFileName(ts.normalizeSlashes(filePath)),
+                sourceMapSourceRoot: compilerOptions.sourceRoot || "",
+                sourceMapSources: [],
+                inputSourceFileNames: [],
+                sourceMapNames: [],
+                sourceMapMappings: "",
+                sourceMapSourcesContent: compilerOptions.inlineSources ? [] : undefined,
+                sourceMapDecodedMappings: []
+            };
+            sourceMapData.sourceMapSourceRoot = ts.normalizeSlashes(sourceMapData.sourceMapSourceRoot);
+            if (sourceMapData.sourceMapSourceRoot.length && sourceMapData.sourceMapSourceRoot.charCodeAt(sourceMapData.sourceMapSourceRoot.length - 1) !== 47) {
+                sourceMapData.sourceMapSourceRoot += ts.directorySeparator;
+            }
+            if (compilerOptions.mapRoot) {
+                sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
+                if (!isBundledEmit) {
+                    ts.Debug.assert(sourceFiles.length === 1);
+                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFiles[0], host, sourceMapDir));
+                }
+                if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
+                    sourceMapDir = ts.combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
+                    sourceMapData.jsSourceMappingURL = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizePath(filePath)), ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), host.getCurrentDirectory(), host.getCanonicalFileName, true);
+                }
+                else {
+                    sourceMapData.jsSourceMappingURL = ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL);
+                }
+            }
+            else {
+                sourceMapDir = ts.getDirectoryPath(ts.normalizePath(filePath));
+            }
+        }
+        function reset() {
+            currentSourceFile = undefined;
+            sourceMapDir = undefined;
+            sourceMapSourceIndex = undefined;
+            lastRecordedSourceMapSpan = undefined;
+            lastEncodedSourceMapSpan = undefined;
+            lastEncodedNameIndex = undefined;
+            sourceMapData = undefined;
+        }
+        function updateLastEncodedAndRecordedSpans() {
+            if (modifyLastSourcePos) {
+                modifyLastSourcePos = false;
+                lastRecordedSourceMapSpan.emittedLine = lastEncodedSourceMapSpan.emittedLine;
+                lastRecordedSourceMapSpan.emittedColumn = lastEncodedSourceMapSpan.emittedColumn;
+                sourceMapData.sourceMapDecodedMappings.pop();
+                lastEncodedSourceMapSpan = sourceMapData.sourceMapDecodedMappings.length ?
+                    sourceMapData.sourceMapDecodedMappings[sourceMapData.sourceMapDecodedMappings.length - 1] :
+                    defaultLastEncodedSourceMapSpan;
+                var sourceMapMappings = sourceMapData.sourceMapMappings;
+                var lenthToSet = sourceMapMappings.length - 1;
+                for (; lenthToSet >= 0; lenthToSet--) {
+                    var currentChar = sourceMapMappings.charAt(lenthToSet);
+                    if (currentChar === ",") {
+                        break;
+                    }
+                    if (currentChar === ";" && lenthToSet !== 0 && sourceMapMappings.charAt(lenthToSet - 1) !== ";") {
+                        break;
+                    }
+                }
+                sourceMapData.sourceMapMappings = sourceMapMappings.substr(0, Math.max(0, lenthToSet));
+            }
+        }
+        function encodeLastRecordedSourceMapSpan() {
+            if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) {
+                return;
+            }
+            var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn;
+            if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) {
+                if (sourceMapData.sourceMapMappings) {
+                    sourceMapData.sourceMapMappings += ",";
+                }
+            }
+            else {
+                for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) {
+                    sourceMapData.sourceMapMappings += ";";
+                }
+                prevEncodedEmittedColumn = 1;
+            }
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn);
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex);
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine);
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn);
+            if (lastRecordedSourceMapSpan.nameIndex >= 0) {
+                ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this");
+                sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex);
+                lastEncodedNameIndex = lastRecordedSourceMapSpan.nameIndex;
+            }
+            lastEncodedSourceMapSpan = lastRecordedSourceMapSpan;
+            sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan);
+        }
+        function emitPos(pos) {
+            if (pos === -1) {
+                return;
+            }
+            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSourceFile, pos);
+            sourceLinePos.line++;
+            sourceLinePos.character++;
+            var emittedLine = writer.getLine();
+            var emittedColumn = writer.getColumn();
+            if (!lastRecordedSourceMapSpan ||
+                lastRecordedSourceMapSpan.emittedLine !== emittedLine ||
+                lastRecordedSourceMapSpan.emittedColumn !== emittedColumn ||
+                (lastRecordedSourceMapSpan.sourceIndex === sourceMapSourceIndex &&
+                    (lastRecordedSourceMapSpan.sourceLine > sourceLinePos.line ||
+                        (lastRecordedSourceMapSpan.sourceLine === sourceLinePos.line && lastRecordedSourceMapSpan.sourceColumn > sourceLinePos.character)))) {
+                encodeLastRecordedSourceMapSpan();
+                lastRecordedSourceMapSpan = {
+                    emittedLine: emittedLine,
+                    emittedColumn: emittedColumn,
+                    sourceLine: sourceLinePos.line,
+                    sourceColumn: sourceLinePos.character,
+                    sourceIndex: sourceMapSourceIndex
+                };
+                stopOverridingSpan = false;
+            }
+            else if (!stopOverridingSpan) {
+                lastRecordedSourceMapSpan.sourceLine = sourceLinePos.line;
+                lastRecordedSourceMapSpan.sourceColumn = sourceLinePos.character;
+                lastRecordedSourceMapSpan.sourceIndex = sourceMapSourceIndex;
+            }
+            updateLastEncodedAndRecordedSpans();
+        }
+        function getStartPos(range) {
+            var rangeHasDecorators = !!range.decorators;
+            return range.pos !== -1 ? ts.skipTrivia(currentSourceFile.text, rangeHasDecorators ? range.decorators.end : range.pos) : -1;
+        }
+        function emitStart(range) {
+            emitPos(getStartPos(range));
+        }
+        function emitEnd(range, stopOverridingEnd) {
+            emitPos(range.end);
+            stopOverridingSpan = stopOverridingEnd;
+        }
+        function changeEmitSourcePos() {
+            ts.Debug.assert(!modifyLastSourcePos);
+            modifyLastSourcePos = true;
+        }
+        function setSourceFile(sourceFile) {
+            currentSourceFile = sourceFile;
+            var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
+            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSourceFile.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, true);
+            sourceMapSourceIndex = ts.indexOf(sourceMapData.sourceMapSources, source);
+            if (sourceMapSourceIndex === -1) {
+                sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
+                sourceMapData.sourceMapSources.push(source);
+                sourceMapData.inputSourceFileNames.push(sourceFile.fileName);
+                if (compilerOptions.inlineSources) {
+                    sourceMapData.sourceMapSourcesContent.push(sourceFile.text);
+                }
+            }
+        }
+        function getText() {
+            encodeLastRecordedSourceMapSpan();
+            return ts.stringify({
+                version: 3,
+                file: sourceMapData.sourceMapFile,
+                sourceRoot: sourceMapData.sourceMapSourceRoot,
+                sources: sourceMapData.sourceMapSources,
+                names: sourceMapData.sourceMapNames,
+                mappings: sourceMapData.sourceMapMappings,
+                sourcesContent: sourceMapData.sourceMapSourcesContent
+            });
+        }
+        function getSourceMappingURL() {
+            if (compilerOptions.inlineSourceMap) {
+                var base64SourceMapText = ts.convertToBase64(getText());
+                return sourceMapData.jsSourceMappingURL = "data:application/json;base64," + base64SourceMapText;
+            }
+            else {
+                return sourceMapData.jsSourceMappingURL;
+            }
+        }
+    }
+    ts.createSourceMapWriter = createSourceMapWriter;
+    var base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    function base64FormatEncode(inValue) {
+        if (inValue < 64) {
+            return base64Chars.charAt(inValue);
+        }
+        throw TypeError(inValue + ": not a 64 based value");
+    }
+    function base64VLQFormatEncode(inValue) {
+        if (inValue < 0) {
+            inValue = ((-inValue) << 1) + 1;
+        }
+        else {
+            inValue = inValue << 1;
+        }
+        var encodedStr = "";
+        do {
+            var currentDigit = inValue & 31;
+            inValue = inValue >> 5;
+            if (inValue > 0) {
+                currentDigit = currentDigit | 32;
+            }
+            encodedStr = encodedStr + base64FormatEncode(currentDigit);
+        } while (inValue > 0);
+        return encodedStr;
+    }
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
+        var declarationDiagnostics = ts.createDiagnosticCollection();
+        ts.forEachExpectedEmitFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
+        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
+        function getDeclarationDiagnosticsFromFile(_a, sources, isBundledEmit) {
+            var declarationFilePath = _a.declarationFilePath;
+            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sources, isBundledEmit);
+        }
+    }
+    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
+    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit) {
+        var newLine = host.getNewLine();
+        var compilerOptions = host.getCompilerOptions();
+        var write;
+        var writeLine;
+        var increaseIndent;
+        var decreaseIndent;
+        var writeTextOfNode;
+        var writer;
+        createAndSetNewTextWriterWithSymbolWriter();
+        var enclosingDeclaration;
+        var resultHasExternalModuleIndicator;
+        var currentText;
+        var currentLineMap;
+        var currentIdentifiers;
+        var isCurrentFileExternalModule;
+        var reportedDeclarationError = false;
+        var errorNameNode;
+        var emitJsDocComments = compilerOptions.removeComments ? function (declaration) { } : writeJsDocComments;
+        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
+        var noDeclare;
+        var moduleElementDeclarationEmitInfo = [];
+        var asynchronousSubModuleDeclarationEmitInfo;
+        var referencesOutput = "";
+        var usedTypeDirectiveReferences;
+        var emittedReferencedFiles = [];
+        var addedGlobalFileReference = false;
+        var allSourcesModuleElementDeclarationEmitInfo = [];
+        ts.forEach(sourceFiles, function (sourceFile) {
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                return;
+            }
+            if (!compilerOptions.noResolve) {
+                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
+                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
+                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
+                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference)) {
+                            addedGlobalFileReference = true;
+                        }
+                        emittedReferencedFiles.push(referencedFile);
+                    }
+                });
+            }
+            resultHasExternalModuleIndicator = false;
+            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
+                noDeclare = false;
+                emitSourceFile(sourceFile);
+            }
+            else if (ts.isExternalModule(sourceFile)) {
+                noDeclare = true;
+                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
+                writeLine();
+                increaseIndent();
+                emitSourceFile(sourceFile);
+                decreaseIndent();
+                write("}");
+                writeLine();
+            }
+            if (moduleElementDeclarationEmitInfo.length) {
+                var oldWriter = writer;
+                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
+                        ts.Debug.assert(aliasEmitInfo.node.kind === 230);
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            increaseIndent();
+                        }
+                        writeImportDeclaration(aliasEmitInfo.node);
+                        aliasEmitInfo.asynchronousOutput = writer.getText();
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            decreaseIndent();
+                        }
+                    }
+                });
+                setWriter(oldWriter);
+                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
+                moduleElementDeclarationEmitInfo = [];
+            }
+            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
+                write("export {};");
+                writeLine();
+            }
+        });
+        if (usedTypeDirectiveReferences) {
+            for (var directive in usedTypeDirectiveReferences) {
+                if (ts.hasProperty(usedTypeDirectiveReferences, directive)) {
+                    referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
+                }
+            }
+        }
+        return {
+            reportedDeclarationError: reportedDeclarationError,
+            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
+            synchronousDeclarationOutput: writer.getText(),
+            referencesOutput: referencesOutput
+        };
+        function hasInternalAnnotation(range) {
+            var comment = currentText.substring(range.pos, range.end);
+            return comment.indexOf("@internal") >= 0;
+        }
+        function stripInternal(node) {
+            if (node) {
+                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
+                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
+                    return;
+                }
+                emitNode(node);
+            }
+        }
+        function createAndSetNewTextWriterWithSymbolWriter() {
+            var writer = ts.createTextWriter(newLine);
+            writer.trackSymbol = trackSymbol;
+            writer.reportInaccessibleThisError = reportInaccessibleThisError;
+            writer.writeKeyword = writer.write;
+            writer.writeOperator = writer.write;
+            writer.writePunctuation = writer.write;
+            writer.writeSpace = writer.write;
+            writer.writeStringLiteral = writer.writeLiteral;
+            writer.writeParameter = writer.write;
+            writer.writeSymbol = writer.write;
+            setWriter(writer);
+        }
+        function setWriter(newWriter) {
+            writer = newWriter;
+            write = newWriter.write;
+            writeTextOfNode = newWriter.writeTextOfNode;
+            writeLine = newWriter.writeLine;
+            increaseIndent = newWriter.increaseIndent;
+            decreaseIndent = newWriter.decreaseIndent;
+        }
+        function writeAsynchronousModuleElements(nodes) {
+            var oldWriter = writer;
+            ts.forEach(nodes, function (declaration) {
+                var nodeToCheck;
+                if (declaration.kind === 218) {
+                    nodeToCheck = declaration.parent.parent;
+                }
+                else if (declaration.kind === 233 || declaration.kind === 234 || declaration.kind === 231) {
+                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
+                }
+                else {
+                    nodeToCheck = declaration;
+                }
+                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
+                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
+                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
+                }
+                if (moduleElementEmitInfo) {
+                    if (moduleElementEmitInfo.node.kind === 230) {
+                        moduleElementEmitInfo.isVisible = true;
+                    }
+                    else {
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
+                            increaseIndent();
+                        }
+                        if (nodeToCheck.kind === 225) {
+                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
+                            asynchronousSubModuleDeclarationEmitInfo = [];
+                        }
+                        writeModuleElement(nodeToCheck);
+                        if (nodeToCheck.kind === 225) {
+                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
+                            asynchronousSubModuleDeclarationEmitInfo = undefined;
+                        }
+                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
+                    }
+                }
+            });
+            setWriter(oldWriter);
+        }
+        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
+            if (!typeReferenceDirectives) {
+                return;
+            }
+            if (!usedTypeDirectiveReferences) {
+                usedTypeDirectiveReferences = {};
+            }
+            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
+                var directive = typeReferenceDirectives_1[_i];
+                if (!ts.hasProperty(usedTypeDirectiveReferences, directive)) {
+                    usedTypeDirectiveReferences[directive] = directive;
+                }
+            }
+        }
+        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
+            if (symbolAccessibilityResult.accessibility === 0) {
+                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
+                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
+                }
+            }
+            else {
+                reportedDeclarationError = true;
+                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
+                if (errorInfo) {
+                    if (errorInfo.typeName) {
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
+                    }
+                    else {
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
+                    }
+                }
+            }
+        }
+        function trackSymbol(symbol, enclosingDeclaration, meaning) {
+            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning));
+            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
+        }
+        function reportInaccessibleThisError() {
+            if (errorNameNode) {
+                reportedDeclarationError = true;
+                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
+            }
+        }
+        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            if (type) {
+                emitType(type);
+            }
+            else {
+                errorNameNode = declaration.name;
+                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, 2, writer);
+                errorNameNode = undefined;
+            }
+        }
+        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            if (signature.type) {
+                emitType(signature.type);
+            }
+            else {
+                errorNameNode = signature.name;
+                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 2, writer);
+                errorNameNode = undefined;
+            }
+        }
+        function emitLines(nodes) {
+            for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
+                var node = nodes_2[_i];
+                emit(node);
+            }
+        }
+        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
+            var currentWriterPos = writer.getTextPos();
+            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
+                var node = nodes_3[_i];
+                if (!canEmitFn || canEmitFn(node)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        write(separator);
+                    }
+                    currentWriterPos = writer.getTextPos();
+                    eachNodeEmitFn(node);
+                }
+            }
+        }
+        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
+            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
+        }
+        function writeJsDocComments(declaration) {
+            if (declaration) {
+                var jsDocComments = ts.getJsDocCommentsFromText(declaration, currentText);
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
+                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, true, newLine, ts.writeCommentRange);
+            }
+        }
+        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            emitType(type);
+        }
+        function emitType(type) {
+            switch (type.kind) {
+                case 117:
+                case 132:
+                case 130:
+                case 120:
+                case 133:
+                case 103:
+                case 135:
+                case 93:
+                case 127:
+                case 165:
+                case 166:
+                    return writeTextOfNode(currentText, type);
+                case 194:
+                    return emitExpressionWithTypeArguments(type);
+                case 155:
+                    return emitTypeReference(type);
+                case 158:
+                    return emitTypeQuery(type);
+                case 160:
+                    return emitArrayType(type);
+                case 161:
+                    return emitTupleType(type);
+                case 162:
+                    return emitUnionType(type);
+                case 163:
+                    return emitIntersectionType(type);
+                case 164:
+                    return emitParenType(type);
+                case 156:
+                case 157:
+                    return emitSignatureDeclarationWithJsDocComments(type);
+                case 159:
+                    return emitTypeLiteral(type);
+                case 69:
+                    return emitEntityName(type);
+                case 139:
+                    return emitEntityName(type);
+                case 154:
+                    return emitTypePredicate(type);
+            }
+            function writeEntityName(entityName) {
+                if (entityName.kind === 69) {
+                    writeTextOfNode(currentText, entityName);
+                }
+                else {
+                    var left = entityName.kind === 139 ? entityName.left : entityName.expression;
+                    var right = entityName.kind === 139 ? entityName.right : entityName.name;
+                    writeEntityName(left);
+                    write(".");
+                    writeTextOfNode(currentText, right);
+                }
+            }
+            function emitEntityName(entityName) {
+                var visibilityResult = resolver.isEntityNameVisible(entityName, entityName.parent.kind === 229 ? entityName.parent : enclosingDeclaration);
+                handleSymbolAccessibilityError(visibilityResult);
+                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
+                writeEntityName(entityName);
+            }
+            function emitExpressionWithTypeArguments(node) {
+                if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                    ts.Debug.assert(node.expression.kind === 69 || node.expression.kind === 172);
+                    emitEntityName(node.expression);
+                    if (node.typeArguments) {
+                        write("<");
+                        emitCommaList(node.typeArguments, emitType);
+                        write(">");
+                    }
+                }
+            }
+            function emitTypeReference(type) {
+                emitEntityName(type.typeName);
+                if (type.typeArguments) {
+                    write("<");
+                    emitCommaList(type.typeArguments, emitType);
+                    write(">");
+                }
+            }
+            function emitTypePredicate(type) {
+                writeTextOfNode(currentText, type.parameterName);
+                write(" is ");
+                emitType(type.type);
+            }
+            function emitTypeQuery(type) {
+                write("typeof ");
+                emitEntityName(type.exprName);
+            }
+            function emitArrayType(type) {
+                emitType(type.elementType);
+                write("[]");
+            }
+            function emitTupleType(type) {
+                write("[");
+                emitCommaList(type.elementTypes, emitType);
+                write("]");
+            }
+            function emitUnionType(type) {
+                emitSeparatedList(type.types, " | ", emitType);
+            }
+            function emitIntersectionType(type) {
+                emitSeparatedList(type.types, " & ", emitType);
+            }
+            function emitParenType(type) {
+                write("(");
+                emitType(type.type);
+                write(")");
+            }
+            function emitTypeLiteral(type) {
+                write("{");
+                if (type.members.length) {
+                    writeLine();
+                    increaseIndent();
+                    emitLines(type.members);
+                    decreaseIndent();
+                }
+                write("}");
+            }
+        }
+        function emitSourceFile(node) {
+            currentText = node.text;
+            currentLineMap = ts.getLineStarts(node);
+            currentIdentifiers = node.identifiers;
+            isCurrentFileExternalModule = ts.isExternalModule(node);
+            enclosingDeclaration = node;
+            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, true);
+            emitLines(node.statements);
+        }
+        function getExportDefaultTempVariableName() {
+            var baseName = "_default";
+            if (!ts.hasProperty(currentIdentifiers, baseName)) {
+                return baseName;
+            }
+            var count = 0;
+            while (true) {
+                count++;
+                var name_23 = baseName + "_" + count;
+                if (!ts.hasProperty(currentIdentifiers, name_23)) {
+                    return name_23;
+                }
+            }
+        }
+        function emitExportAssignment(node) {
+            if (node.expression.kind === 69) {
+                write(node.isExportEquals ? "export = " : "export default ");
+                writeTextOfNode(currentText, node.expression);
+            }
+            else {
+                var tempVarName = getExportDefaultTempVariableName();
+                if (!noDeclare) {
+                    write("declare ");
+                }
+                write("var ");
+                write(tempVarName);
+                write(": ");
+                writer.getSymbolAccessibilityDiagnostic = getDefaultExportAccessibilityDiagnostic;
+                resolver.writeTypeOfExpression(node.expression, enclosingDeclaration, 2, writer);
+                write(";");
+                writeLine();
+                write(node.isExportEquals ? "export = " : "export default ");
+                write(tempVarName);
+            }
+            write(";");
+            writeLine();
+            if (node.expression.kind === 69) {
+                var nodes = resolver.collectLinkedAliases(node.expression);
+                writeAsynchronousModuleElements(nodes);
+            }
+            function getDefaultExportAccessibilityDiagnostic(diagnostic) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
+                    errorNode: node
+                };
+            }
+        }
+        function isModuleElementVisible(node) {
+            return resolver.isDeclarationVisible(node);
+        }
+        function emitModuleElement(node, isModuleElementVisible) {
+            if (isModuleElementVisible) {
+                writeModuleElement(node);
+            }
+            else if (node.kind === 229 ||
+                (node.parent.kind === 256 && isCurrentFileExternalModule)) {
+                var isVisible = void 0;
+                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 256) {
+                    asynchronousSubModuleDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
+                else {
+                    if (node.kind === 230) {
+                        var importDeclaration = node;
+                        if (importDeclaration.importClause) {
+                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
+                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
+                        }
+                    }
+                    moduleElementDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
+            }
+        }
+        function writeModuleElement(node) {
+            switch (node.kind) {
+                case 220:
+                    return writeFunctionDeclaration(node);
+                case 200:
+                    return writeVariableStatement(node);
+                case 222:
+                    return writeInterfaceDeclaration(node);
+                case 221:
+                    return writeClassDeclaration(node);
+                case 223:
+                    return writeTypeAliasDeclaration(node);
+                case 224:
+                    return writeEnumDeclaration(node);
+                case 225:
+                    return writeModuleDeclaration(node);
+                case 229:
+                    return writeImportEqualsDeclaration(node);
+                case 230:
+                    return writeImportDeclaration(node);
+                default:
+                    ts.Debug.fail("Unknown symbol kind");
+            }
+        }
+        function emitModuleElementDeclarationFlags(node) {
+            if (node.parent.kind === 256) {
+                if (node.flags & 1) {
+                    write("export ");
+                }
+                if (node.flags & 512) {
+                    write("default ");
+                }
+                else if (node.kind !== 222 && !noDeclare) {
+                    write("declare ");
+                }
+            }
+        }
+        function emitClassMemberDeclarationFlags(flags) {
+            if (flags & 8) {
+                write("private ");
+            }
+            else if (flags & 16) {
+                write("protected ");
+            }
+            if (flags & 32) {
+                write("static ");
+            }
+            if (flags & 64) {
+                write("readonly ");
+            }
+            if (flags & 128) {
+                write("abstract ");
+            }
+        }
+        function writeImportEqualsDeclaration(node) {
+            emitJsDocComments(node);
+            if (node.flags & 1) {
+                write("export ");
+            }
+            write("import ");
+            writeTextOfNode(currentText, node.name);
+            write(" = ");
+            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
+                write(";");
+            }
+            else {
+                write("require(");
+                emitExternalModuleSpecifier(node);
+                write(");");
+            }
+            writer.writeLine();
+            function getImportEntityNameVisibilityError(symbolAccessibilityResult) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
+                    errorNode: node,
+                    typeName: node.name
+                };
+            }
+        }
+        function isVisibleNamedBinding(namedBindings) {
+            if (namedBindings) {
+                if (namedBindings.kind === 232) {
+                    return resolver.isDeclarationVisible(namedBindings);
+                }
+                else {
+                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
+                }
+            }
+        }
+        function writeImportDeclaration(node) {
+            emitJsDocComments(node);
+            if (node.flags & 1) {
+                write("export ");
+            }
+            write("import ");
+            if (node.importClause) {
+                var currentWriterPos = writer.getTextPos();
+                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
+                    writeTextOfNode(currentText, node.importClause.name);
+                }
+                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        write(", ");
+                    }
+                    if (node.importClause.namedBindings.kind === 232) {
+                        write("* as ");
+                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
+                    }
+                    else {
+                        write("{ ");
+                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
+                        write(" }");
+                    }
+                }
+                write(" from ");
+            }
+            emitExternalModuleSpecifier(node);
+            write(";");
+            writer.writeLine();
+        }
+        function emitExternalModuleSpecifier(parent) {
+            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 225;
+            var moduleSpecifier;
+            if (parent.kind === 229) {
+                var node = parent;
+                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
+            }
+            else if (parent.kind === 225) {
+                moduleSpecifier = parent.name;
+            }
+            else {
+                var node = parent;
+                moduleSpecifier = node.moduleSpecifier;
+            }
+            if (moduleSpecifier.kind === 9 && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
+                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
+                if (moduleName) {
+                    write('"');
+                    write(moduleName);
+                    write('"');
+                    return;
+                }
+            }
+            writeTextOfNode(currentText, moduleSpecifier);
+        }
+        function emitImportOrExportSpecifier(node) {
+            if (node.propertyName) {
+                writeTextOfNode(currentText, node.propertyName);
+                write(" as ");
+            }
+            writeTextOfNode(currentText, node.name);
+        }
+        function emitExportSpecifier(node) {
+            emitImportOrExportSpecifier(node);
+            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
+            writeAsynchronousModuleElements(nodes);
+        }
+        function emitExportDeclaration(node) {
+            emitJsDocComments(node);
+            write("export ");
+            if (node.exportClause) {
+                write("{ ");
+                emitCommaList(node.exportClause.elements, emitExportSpecifier);
+                write(" }");
+            }
+            else {
+                write("*");
+            }
+            if (node.moduleSpecifier) {
+                write(" from ");
+                emitExternalModuleSpecifier(node);
+            }
+            write(";");
+            writer.writeLine();
+        }
+        function writeModuleDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isGlobalScopeAugmentation(node)) {
+                write("global ");
+            }
+            else {
+                if (node.flags & 4096) {
+                    write("namespace ");
+                }
+                else {
+                    write("module ");
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    emitExternalModuleSpecifier(node);
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
+                }
+            }
+            while (node.body.kind !== 226) {
+                node = node.body;
+                write(".");
+                writeTextOfNode(currentText, node.name);
+            }
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.body.statements);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function writeTypeAliasDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("type ");
+            writeTextOfNode(currentText, node.name);
+            emitTypeParameters(node.typeParameters);
+            write(" = ");
+            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
+            write(";");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+            function getTypeAliasDeclarationVisibilityError(symbolAccessibilityResult) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
+                    errorNode: node.type,
+                    typeName: node.name
+                };
+            }
+        }
+        function writeEnumDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isConst(node)) {
+                write("const ");
+            }
+            write("enum ");
+            writeTextOfNode(currentText, node.name);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+        }
+        function emitEnumMemberDeclaration(node) {
+            emitJsDocComments(node);
+            writeTextOfNode(currentText, node.name);
+            var enumMemberValue = resolver.getConstantValue(node);
+            if (enumMemberValue !== undefined) {
+                write(" = ");
+                write(enumMemberValue.toString());
+            }
+            write(",");
+            writeLine();
+        }
+        function isPrivateMethodTypeParameter(node) {
+            return node.parent.kind === 147 && (node.parent.flags & 8);
+        }
+        function emitTypeParameters(typeParameters) {
+            function emitTypeParameter(node) {
+                increaseIndent();
+                emitJsDocComments(node);
+                decreaseIndent();
+                writeTextOfNode(currentText, node.name);
+                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
+                    write(" extends ");
+                    if (node.parent.kind === 156 ||
+                        node.parent.kind === 157 ||
+                        (node.parent.parent && node.parent.parent.kind === 159)) {
+                        ts.Debug.assert(node.parent.kind === 147 ||
+                            node.parent.kind === 146 ||
+                            node.parent.kind === 156 ||
+                            node.parent.kind === 157 ||
+                            node.parent.kind === 151 ||
+                            node.parent.kind === 152);
+                        emitType(node.constraint);
+                    }
+                    else {
+                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
+                    }
+                }
+                function getTypeParameterConstraintVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage;
+                    switch (node.parent.kind) {
+                        case 221:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
+                            break;
+                        case 222:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 152:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 151:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 147:
+                        case 146:
+                            if (node.parent.flags & 32) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else if (node.parent.parent.kind === 221) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                            }
+                            break;
+                        case 220:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                            break;
+                        default:
+                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: node.name
+                    };
+                }
+            }
+            if (typeParameters) {
+                write("<");
+                emitCommaList(typeParameters, emitTypeParameter);
+                write(">");
+            }
+        }
+        function emitHeritageClause(typeReferences, isImplementsList) {
+            if (typeReferences) {
+                write(isImplementsList ? " implements " : " extends ");
+                emitCommaList(typeReferences, emitTypeOfTypeReference);
+            }
+            function emitTypeOfTypeReference(node) {
+                if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
+                }
+                else if (!isImplementsList && node.expression.kind === 93) {
+                    write("null");
+                }
+                else {
+                    writer.getSymbolAccessibilityDiagnostic = getHeritageClauseVisibilityError;
+                    resolver.writeBaseConstructorTypeOfClass(enclosingDeclaration, enclosingDeclaration, 2, writer);
+                }
+                function getHeritageClauseVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage;
+                    if (node.parent.parent.kind === 221) {
+                        diagnosticMessage = isImplementsList ?
+                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
+                            ts.Diagnostics.Extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        diagnosticMessage = ts.Diagnostics.Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: node.parent.parent.name
+                    };
+                }
+            }
+        }
+        function writeClassDeclaration(node) {
+            function emitParameterProperties(constructorDeclaration) {
+                if (constructorDeclaration) {
+                    ts.forEach(constructorDeclaration.parameters, function (param) {
+                        if (param.flags & 92) {
+                            emitPropertyDeclaration(param);
+                        }
+                    });
+                }
+            }
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (node.flags & 128) {
+                write("abstract ");
+            }
+            write("class ");
+            writeTextOfNode(currentText, node.name);
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitTypeParameters(node.typeParameters);
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            if (baseTypeNode) {
+                emitHeritageClause([baseTypeNode], false);
+            }
+            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), true);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitParameterProperties(ts.getFirstConstructorWithBody(node));
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function writeInterfaceDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("interface ");
+            writeTextOfNode(currentText, node.name);
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitTypeParameters(node.typeParameters);
+            emitHeritageClause(ts.getInterfaceBaseTypeNodes(node), false);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function emitPropertyDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            emitJsDocComments(node);
+            emitClassMemberDeclarationFlags(node.flags);
+            emitVariableDeclaration(node);
+            write(";");
+            writeLine();
+        }
+        function emitVariableDeclaration(node) {
+            if (node.kind !== 218 || resolver.isDeclarationVisible(node)) {
+                if (ts.isBindingPattern(node.name)) {
+                    emitBindingPattern(node.name);
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
+                    if ((node.kind === 145 || node.kind === 144 || node.kind === 142) && ts.hasQuestionToken(node)) {
+                        write("?");
+                    }
+                    if ((node.kind === 145 || node.kind === 144) && node.parent.kind === 159) {
+                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
+                    }
+                    else if (!(node.flags & 8)) {
+                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
+                    }
+                }
+            }
+            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                if (node.kind === 218) {
+                    return symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 ?
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
+                }
+                else if (node.kind === 145 || node.kind === 144) {
+                    if (node.flags & 32) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else if (node.parent.kind === 221) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
+                    }
+                }
+            }
+            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
+            }
+            function emitBindingPattern(bindingPattern) {
+                var elements = [];
+                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (element.kind !== 193) {
+                        elements.push(element);
+                    }
+                }
+                emitCommaList(elements, emitBindingElement);
+            }
+            function emitBindingElement(bindingElement) {
+                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                    return diagnosticMessage !== undefined ? {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: bindingElement,
+                        typeName: bindingElement.name
+                    } : undefined;
+                }
+                if (bindingElement.name) {
+                    if (ts.isBindingPattern(bindingElement.name)) {
+                        emitBindingPattern(bindingElement.name);
+                    }
+                    else {
+                        writeTextOfNode(currentText, bindingElement.name);
+                        writeTypeOfDeclaration(bindingElement, undefined, getBindingElementTypeVisibilityError);
+                    }
+                }
+            }
+        }
+        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
+            if (node.type) {
+                write(": ");
+                emitType(node.type);
+            }
+        }
+        function isVariableStatementVisible(node) {
+            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
+        }
+        function writeVariableStatement(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isLet(node.declarationList)) {
+                write("let ");
+            }
+            else if (ts.isConst(node.declarationList)) {
+                write("const ");
+            }
+            else {
+                write("var ");
+            }
+            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
+            write(";");
+            writeLine();
+        }
+        function emitAccessorDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+            var accessorWithTypeAnnotation;
+            if (node === accessors.firstAccessor) {
+                emitJsDocComments(accessors.getAccessor);
+                emitJsDocComments(accessors.setAccessor);
+                emitClassMemberDeclarationFlags(node.flags | (accessors.setAccessor ? 0 : 64));
+                writeTextOfNode(currentText, node.name);
+                if (!(node.flags & 8)) {
+                    accessorWithTypeAnnotation = node;
+                    var type = getTypeAnnotationFromAccessor(node);
+                    if (!type) {
+                        var anotherAccessor = node.kind === 149 ? accessors.setAccessor : accessors.getAccessor;
+                        type = getTypeAnnotationFromAccessor(anotherAccessor);
+                        if (type) {
+                            accessorWithTypeAnnotation = anotherAccessor;
+                        }
+                    }
+                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
+                }
+                write(";");
+                writeLine();
+            }
+            function getTypeAnnotationFromAccessor(accessor) {
+                if (accessor) {
+                    return accessor.kind === 149
+                        ? accessor.type
+                        : accessor.parameters.length > 0
+                            ? accessor.parameters[0].type
+                            : undefined;
+                }
+            }
+            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                if (accessorWithTypeAnnotation.kind === 150) {
+                    if (accessorWithTypeAnnotation.parent.flags & 32) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.parameters[0],
+                        typeName: accessorWithTypeAnnotation.name
+                    };
+                }
+                else {
+                    if (accessorWithTypeAnnotation.flags & 32) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.name,
+                        typeName: undefined
+                    };
+                }
+            }
+        }
+        function writeFunctionDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            if (!resolver.isImplementationOfOverload(node)) {
+                emitJsDocComments(node);
+                if (node.kind === 220) {
+                    emitModuleElementDeclarationFlags(node);
+                }
+                else if (node.kind === 147 || node.kind === 148) {
+                    emitClassMemberDeclarationFlags(node.flags);
+                }
+                if (node.kind === 220) {
+                    write("function ");
+                    writeTextOfNode(currentText, node.name);
+                }
+                else if (node.kind === 148) {
+                    write("constructor");
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
+                    if (ts.hasQuestionToken(node)) {
+                        write("?");
+                    }
+                }
+                emitSignatureDeclaration(node);
+            }
+        }
+        function emitSignatureDeclarationWithJsDocComments(node) {
+            emitJsDocComments(node);
+            emitSignatureDeclaration(node);
+        }
+        function emitSignatureDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            var closeParenthesizedFunctionType = false;
+            if (node.kind === 153) {
+                emitClassMemberDeclarationFlags(node.flags);
+                write("[");
+            }
+            else {
+                if (node.kind === 152 || node.kind === 157) {
+                    write("new ");
+                }
+                else if (node.kind === 156) {
+                    var currentOutput = writer.getText();
+                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
+                        closeParenthesizedFunctionType = true;
+                        write("(");
+                    }
+                }
+                emitTypeParameters(node.typeParameters);
+                write("(");
+            }
+            emitCommaList(node.parameters, emitParameterDeclaration);
+            if (node.kind === 153) {
+                write("]");
+            }
+            else {
+                write(")");
+            }
+            var isFunctionTypeOrConstructorType = node.kind === 156 || node.kind === 157;
+            if (isFunctionTypeOrConstructorType || node.parent.kind === 159) {
+                if (node.type) {
+                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
+                    emitType(node.type);
+                }
+            }
+            else if (node.kind !== 148 && !(node.flags & 8)) {
+                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
+            }
+            enclosingDeclaration = prevEnclosingDeclaration;
+            if (!isFunctionTypeOrConstructorType) {
+                write(";");
+                writeLine();
+            }
+            else if (closeParenthesizedFunctionType) {
+                write(")");
+            }
+            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                switch (node.kind) {
+                    case 152:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 151:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 153:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 147:
+                    case 146:
+                        if (node.flags & 32) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 ?
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else if (node.parent.kind === 221) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 ?
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
+                        }
+                        break;
+                    case 220:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
+                        break;
+                    default:
+                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
+                }
+                return {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node.name || node
+                };
+            }
+        }
+        function emitParameterDeclaration(node) {
+            increaseIndent();
+            emitJsDocComments(node);
+            if (node.dotDotDotToken) {
+                write("...");
+            }
+            if (ts.isBindingPattern(node.name)) {
+                emitBindingPattern(node.name);
+            }
+            else {
+                writeTextOfNode(currentText, node.name);
+            }
+            if (resolver.isOptionalParameter(node)) {
+                write("?");
+            }
+            decreaseIndent();
+            if (node.parent.kind === 156 ||
+                node.parent.kind === 157 ||
+                node.parent.parent.kind === 159) {
+                emitTypeOfVariableDeclarationFromTypeLiteral(node);
+            }
+            else if (!(node.parent.flags & 8)) {
+                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
+            }
+            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
+            }
+            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                switch (node.parent.kind) {
+                    case 148:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
+                    case 152:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 151:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 147:
+                    case 146:
+                        if (node.parent.flags & 32) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 ?
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else if (node.parent.parent.kind === 221) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 ?
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                        }
+                    case 220:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                    default:
+                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
+                }
+            }
+            function emitBindingPattern(bindingPattern) {
+                if (bindingPattern.kind === 167) {
+                    write("{");
+                    emitCommaList(bindingPattern.elements, emitBindingElement);
+                    write("}");
+                }
+                else if (bindingPattern.kind === 168) {
+                    write("[");
+                    var elements = bindingPattern.elements;
+                    emitCommaList(elements, emitBindingElement);
+                    if (elements && elements.hasTrailingComma) {
+                        write(", ");
+                    }
+                    write("]");
+                }
+            }
+            function emitBindingElement(bindingElement) {
+                if (bindingElement.kind === 193) {
+                    write(" ");
+                }
+                else if (bindingElement.kind === 169) {
+                    if (bindingElement.propertyName) {
+                        writeTextOfNode(currentText, bindingElement.propertyName);
+                        write(": ");
+                    }
+                    if (bindingElement.name) {
+                        if (ts.isBindingPattern(bindingElement.name)) {
+                            emitBindingPattern(bindingElement.name);
+                        }
+                        else {
+                            ts.Debug.assert(bindingElement.name.kind === 69);
+                            if (bindingElement.dotDotDotToken) {
+                                write("...");
+                            }
+                            writeTextOfNode(currentText, bindingElement.name);
+                        }
+                    }
+                }
+            }
+        }
+        function emitNode(node) {
+            switch (node.kind) {
+                case 220:
+                case 225:
+                case 229:
+                case 222:
+                case 221:
+                case 223:
+                case 224:
+                    return emitModuleElement(node, isModuleElementVisible(node));
+                case 200:
+                    return emitModuleElement(node, isVariableStatementVisible(node));
+                case 230:
+                    return emitModuleElement(node, !node.importClause);
+                case 236:
+                    return emitExportDeclaration(node);
+                case 148:
+                case 147:
+                case 146:
+                    return writeFunctionDeclaration(node);
+                case 152:
+                case 151:
+                case 153:
+                    return emitSignatureDeclarationWithJsDocComments(node);
+                case 149:
+                case 150:
+                    return emitAccessorDeclaration(node);
+                case 145:
+                case 144:
+                    return emitPropertyDeclaration(node);
+                case 255:
+                    return emitEnumMemberDeclaration(node);
+                case 235:
+                    return emitExportAssignment(node);
+                case 256:
+                    return emitSourceFile(node);
+            }
+        }
+        function writeReferencePath(referencedFile, addBundledFileReference) {
+            var declFileName;
+            var addedBundledEmitReference = false;
+            if (ts.isDeclarationFile(referencedFile)) {
+                declFileName = referencedFile.fileName;
+            }
+            else {
+                ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile);
+            }
+            if (declFileName) {
+                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, false);
+                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
+            }
+            return addedBundledEmitReference;
+            function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) {
+                if (isBundledEmit && !addBundledFileReference) {
+                    return;
+                }
+                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
+                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
+                addedBundledEmitReference = isBundledEmit;
+            }
+        }
+    }
+    function writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) {
+        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit);
+        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
+        if (!emitSkipped) {
+            var declarationOutput = emitDeclarationResult.referencesOutput
+                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
+            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
+        }
+        return emitSkipped;
+        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
+            var appliedSyncOutputPos = 0;
+            var declarationOutput = "";
+            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                if (aliasEmitInfo.asynchronousOutput) {
+                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
+                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
+                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
+                }
+            });
+            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
+            return declarationOutput;
+        }
+    }
+    ts.writeDeclarationFile = writeDeclarationFile;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getResolvedExternalModuleName(host, file) {
+        return file.moduleName || ts.getExternalModuleNameFromPath(host, file.fileName);
+    }
+    ts.getResolvedExternalModuleName = getResolvedExternalModuleName;
+    function getExternalModuleNameFromDeclaration(host, resolver, declaration) {
+        var file = resolver.getExternalModuleFileFromDeclaration(declaration);
+        if (!file || ts.isDeclarationFile(file)) {
+            return undefined;
+        }
+        return getResolvedExternalModuleName(host, file);
+    }
+    ts.getExternalModuleNameFromDeclaration = getExternalModuleNameFromDeclaration;
+    var entities = {
+        "quot": 0x0022,
+        "amp": 0x0026,
+        "apos": 0x0027,
+        "lt": 0x003C,
+        "gt": 0x003E,
+        "nbsp": 0x00A0,
+        "iexcl": 0x00A1,
+        "cent": 0x00A2,
+        "pound": 0x00A3,
+        "curren": 0x00A4,
+        "yen": 0x00A5,
+        "brvbar": 0x00A6,
+        "sect": 0x00A7,
+        "uml": 0x00A8,
+        "copy": 0x00A9,
+        "ordf": 0x00AA,
+        "laquo": 0x00AB,
+        "not": 0x00AC,
+        "shy": 0x00AD,
+        "reg": 0x00AE,
+        "macr": 0x00AF,
+        "deg": 0x00B0,
+        "plusmn": 0x00B1,
+        "sup2": 0x00B2,
+        "sup3": 0x00B3,
+        "acute": 0x00B4,
+        "micro": 0x00B5,
+        "para": 0x00B6,
+        "middot": 0x00B7,
+        "cedil": 0x00B8,
+        "sup1": 0x00B9,
+        "ordm": 0x00BA,
+        "raquo": 0x00BB,
+        "frac14": 0x00BC,
+        "frac12": 0x00BD,
+        "frac34": 0x00BE,
+        "iquest": 0x00BF,
+        "Agrave": 0x00C0,
+        "Aacute": 0x00C1,
+        "Acirc": 0x00C2,
+        "Atilde": 0x00C3,
+        "Auml": 0x00C4,
+        "Aring": 0x00C5,
+        "AElig": 0x00C6,
+        "Ccedil": 0x00C7,
+        "Egrave": 0x00C8,
+        "Eacute": 0x00C9,
+        "Ecirc": 0x00CA,
+        "Euml": 0x00CB,
+        "Igrave": 0x00CC,
+        "Iacute": 0x00CD,
+        "Icirc": 0x00CE,
+        "Iuml": 0x00CF,
+        "ETH": 0x00D0,
+        "Ntilde": 0x00D1,
+        "Ograve": 0x00D2,
+        "Oacute": 0x00D3,
+        "Ocirc": 0x00D4,
+        "Otilde": 0x00D5,
+        "Ouml": 0x00D6,
+        "times": 0x00D7,
+        "Oslash": 0x00D8,
+        "Ugrave": 0x00D9,
+        "Uacute": 0x00DA,
+        "Ucirc": 0x00DB,
+        "Uuml": 0x00DC,
+        "Yacute": 0x00DD,
+        "THORN": 0x00DE,
+        "szlig": 0x00DF,
+        "agrave": 0x00E0,
+        "aacute": 0x00E1,
+        "acirc": 0x00E2,
+        "atilde": 0x00E3,
+        "auml": 0x00E4,
+        "aring": 0x00E5,
+        "aelig": 0x00E6,
+        "ccedil": 0x00E7,
+        "egrave": 0x00E8,
+        "eacute": 0x00E9,
+        "ecirc": 0x00EA,
+        "euml": 0x00EB,
+        "igrave": 0x00EC,
+        "iacute": 0x00ED,
+        "icirc": 0x00EE,
+        "iuml": 0x00EF,
+        "eth": 0x00F0,
+        "ntilde": 0x00F1,
+        "ograve": 0x00F2,
+        "oacute": 0x00F3,
+        "ocirc": 0x00F4,
+        "otilde": 0x00F5,
+        "ouml": 0x00F6,
+        "divide": 0x00F7,
+        "oslash": 0x00F8,
+        "ugrave": 0x00F9,
+        "uacute": 0x00FA,
+        "ucirc": 0x00FB,
+        "uuml": 0x00FC,
+        "yacute": 0x00FD,
+        "thorn": 0x00FE,
+        "yuml": 0x00FF,
+        "OElig": 0x0152,
+        "oelig": 0x0153,
+        "Scaron": 0x0160,
+        "scaron": 0x0161,
+        "Yuml": 0x0178,
+        "fnof": 0x0192,
+        "circ": 0x02C6,
+        "tilde": 0x02DC,
+        "Alpha": 0x0391,
+        "Beta": 0x0392,
+        "Gamma": 0x0393,
+        "Delta": 0x0394,
+        "Epsilon": 0x0395,
+        "Zeta": 0x0396,
+        "Eta": 0x0397,
+        "Theta": 0x0398,
+        "Iota": 0x0399,
+        "Kappa": 0x039A,
+        "Lambda": 0x039B,
+        "Mu": 0x039C,
+        "Nu": 0x039D,
+        "Xi": 0x039E,
+        "Omicron": 0x039F,
+        "Pi": 0x03A0,
+        "Rho": 0x03A1,
+        "Sigma": 0x03A3,
+        "Tau": 0x03A4,
+        "Upsilon": 0x03A5,
+        "Phi": 0x03A6,
+        "Chi": 0x03A7,
+        "Psi": 0x03A8,
+        "Omega": 0x03A9,
+        "alpha": 0x03B1,
+        "beta": 0x03B2,
+        "gamma": 0x03B3,
+        "delta": 0x03B4,
+        "epsilon": 0x03B5,
+        "zeta": 0x03B6,
+        "eta": 0x03B7,
+        "theta": 0x03B8,
+        "iota": 0x03B9,
+        "kappa": 0x03BA,
+        "lambda": 0x03BB,
+        "mu": 0x03BC,
+        "nu": 0x03BD,
+        "xi": 0x03BE,
+        "omicron": 0x03BF,
+        "pi": 0x03C0,
+        "rho": 0x03C1,
+        "sigmaf": 0x03C2,
+        "sigma": 0x03C3,
+        "tau": 0x03C4,
+        "upsilon": 0x03C5,
+        "phi": 0x03C6,
+        "chi": 0x03C7,
+        "psi": 0x03C8,
+        "omega": 0x03C9,
+        "thetasym": 0x03D1,
+        "upsih": 0x03D2,
+        "piv": 0x03D6,
+        "ensp": 0x2002,
+        "emsp": 0x2003,
+        "thinsp": 0x2009,
+        "zwnj": 0x200C,
+        "zwj": 0x200D,
+        "lrm": 0x200E,
+        "rlm": 0x200F,
+        "ndash": 0x2013,
+        "mdash": 0x2014,
+        "lsquo": 0x2018,
+        "rsquo": 0x2019,
+        "sbquo": 0x201A,
+        "ldquo": 0x201C,
+        "rdquo": 0x201D,
+        "bdquo": 0x201E,
+        "dagger": 0x2020,
+        "Dagger": 0x2021,
+        "bull": 0x2022,
+        "hellip": 0x2026,
+        "permil": 0x2030,
+        "prime": 0x2032,
+        "Prime": 0x2033,
+        "lsaquo": 0x2039,
+        "rsaquo": 0x203A,
+        "oline": 0x203E,
+        "frasl": 0x2044,
+        "euro": 0x20AC,
+        "image": 0x2111,
+        "weierp": 0x2118,
+        "real": 0x211C,
+        "trade": 0x2122,
+        "alefsym": 0x2135,
+        "larr": 0x2190,
+        "uarr": 0x2191,
+        "rarr": 0x2192,
+        "darr": 0x2193,
+        "harr": 0x2194,
+        "crarr": 0x21B5,
+        "lArr": 0x21D0,
+        "uArr": 0x21D1,
+        "rArr": 0x21D2,
+        "dArr": 0x21D3,
+        "hArr": 0x21D4,
+        "forall": 0x2200,
+        "part": 0x2202,
+        "exist": 0x2203,
+        "empty": 0x2205,
+        "nabla": 0x2207,
+        "isin": 0x2208,
+        "notin": 0x2209,
+        "ni": 0x220B,
+        "prod": 0x220F,
+        "sum": 0x2211,
+        "minus": 0x2212,
+        "lowast": 0x2217,
+        "radic": 0x221A,
+        "prop": 0x221D,
+        "infin": 0x221E,
+        "ang": 0x2220,
+        "and": 0x2227,
+        "or": 0x2228,
+        "cap": 0x2229,
+        "cup": 0x222A,
+        "int": 0x222B,
+        "there4": 0x2234,
+        "sim": 0x223C,
+        "cong": 0x2245,
+        "asymp": 0x2248,
+        "ne": 0x2260,
+        "equiv": 0x2261,
+        "le": 0x2264,
+        "ge": 0x2265,
+        "sub": 0x2282,
+        "sup": 0x2283,
+        "nsub": 0x2284,
+        "sube": 0x2286,
+        "supe": 0x2287,
+        "oplus": 0x2295,
+        "otimes": 0x2297,
+        "perp": 0x22A5,
+        "sdot": 0x22C5,
+        "lceil": 0x2308,
+        "rceil": 0x2309,
+        "lfloor": 0x230A,
+        "rfloor": 0x230B,
+        "lang": 0x2329,
+        "rang": 0x232A,
+        "loz": 0x25CA,
+        "spades": 0x2660,
+        "clubs": 0x2663,
+        "hearts": 0x2665,
+        "diams": 0x2666
+    };
+    function emitFiles(resolver, host, targetSourceFile) {
+        var extendsHelper = "\nvar __extends = (this && this.__extends) || function (d, b) {\n    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n    function __() { this.constructor = d; }\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n};";
+        var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n    for (var s, i = 1, n = arguments.length; i < n; i++) {\n        s = arguments[i];\n        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n            t[p] = s[p];\n    }\n    return t;\n};";
+        var decorateHelper = "\nvar __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\n};";
+        var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};";
+        var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n    return function (target, key) { decorator(target, key, paramIndex); }\n};";
+        var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n    return new (P || (P = Promise))(function (resolve, reject) {\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n        step((generator = generator.apply(thisArg, _arguments)).next());\n    });\n};";
+        var compilerOptions = host.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var modulekind = ts.getEmitModuleKind(compilerOptions);
+        var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
+        var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined;
+        var emitterDiagnostics = ts.createDiagnosticCollection();
+        var emitSkipped = false;
+        var newLine = host.getNewLine();
+        var emitJavaScript = createFileEmitter();
+        ts.forEachExpectedEmitFile(host, emitFile, targetSourceFile);
+        return {
+            emitSkipped: emitSkipped,
+            diagnostics: emitterDiagnostics.getDiagnostics(),
+            emittedFiles: emittedFilesList,
+            sourceMaps: sourceMapDataList
+        };
+        function isUniqueLocalName(name, container) {
+            for (var node = container; ts.isNodeDescendentOf(node, container); node = node.nextContainer) {
+                if (node.locals && ts.hasProperty(node.locals, name)) {
+                    if (node.locals[name].flags & (107455 | 1048576 | 8388608)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function setLabeledJump(state, isBreak, labelText, labelMarker) {
+            if (isBreak) {
+                if (!state.labeledNonLocalBreaks) {
+                    state.labeledNonLocalBreaks = {};
+                }
+                state.labeledNonLocalBreaks[labelText] = labelMarker;
+            }
+            else {
+                if (!state.labeledNonLocalContinues) {
+                    state.labeledNonLocalContinues = {};
+                }
+                state.labeledNonLocalContinues[labelText] = labelMarker;
+            }
+        }
+        function hoistVariableDeclarationFromLoop(state, declaration) {
+            if (!state.hoistedLocalVariables) {
+                state.hoistedLocalVariables = [];
+            }
+            visit(declaration.name);
+            function visit(node) {
+                if (node.kind === 69) {
+                    state.hoistedLocalVariables.push(node);
+                }
+                else {
+                    for (var _a = 0, _b = node.elements; _a < _b.length; _a++) {
+                        var element = _b[_a];
+                        visit(element.name);
+                    }
+                }
+            }
+        }
+        function createFileEmitter() {
+            var writer = ts.createTextWriter(newLine);
+            var write = writer.write, writeTextOfNode = writer.writeTextOfNode, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent;
+            var sourceMap = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? ts.createSourceMapWriter(host, writer) : ts.getNullSourceMapWriter();
+            var setSourceFile = sourceMap.setSourceFile, emitStart = sourceMap.emitStart, emitEnd = sourceMap.emitEnd, emitPos = sourceMap.emitPos;
+            var currentSourceFile;
+            var currentText;
+            var currentLineMap;
+            var currentFileIdentifiers;
+            var renamedDependencies;
+            var isEs6Module;
+            var isCurrentFileExternalModule;
+            var exportFunctionForFile;
+            var contextObjectForFile;
+            var generatedNameSet;
+            var nodeToGeneratedName;
+            var computedPropertyNamesToGeneratedNames;
+            var decoratedClassAliases;
+            var convertedLoopState;
+            var extendsEmitted;
+            var assignEmitted;
+            var decorateEmitted;
+            var paramEmitted;
+            var awaiterEmitted;
+            var tempFlags = 0;
+            var tempVariables;
+            var tempParameters;
+            var externalImports;
+            var exportSpecifiers;
+            var exportEquals;
+            var hasExportStarsToExportValues;
+            var detachedCommentsInfo;
+            var sourceMapData;
+            var isOwnFileEmit;
+            var emitLeadingCommentsOfPosition = compilerOptions.removeComments ? function (pos) { } : emitLeadingCommentsOfPositionWorker;
+            var setSourceMapWriterEmit = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? changeSourceMapEmit : function (writer) { };
+            var moduleEmitDelegates = (_a = {},
+                _a[ts.ModuleKind.ES6] = emitES6Module,
+                _a[ts.ModuleKind.AMD] = emitAMDModule,
+                _a[ts.ModuleKind.System] = emitSystemModule,
+                _a[ts.ModuleKind.UMD] = emitUMDModule,
+                _a[ts.ModuleKind.CommonJS] = emitCommonJSModule,
+                _a
+            );
+            var bundleEmitDelegates = (_b = {},
+                _b[ts.ModuleKind.ES6] = function () { },
+                _b[ts.ModuleKind.AMD] = emitAMDModule,
+                _b[ts.ModuleKind.System] = emitSystemModule,
+                _b[ts.ModuleKind.UMD] = function () { },
+                _b[ts.ModuleKind.CommonJS] = function () { },
+                _b
+            );
+            return doEmit;
+            function doEmit(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
+                sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
+                generatedNameSet = {};
+                nodeToGeneratedName = [];
+                decoratedClassAliases = [];
+                isOwnFileEmit = !isBundledEmit;
+                if (isBundledEmit && modulekind) {
+                    ts.forEach(sourceFiles, emitEmitHelpers);
+                }
+                ts.forEach(sourceFiles, emitSourceFile);
+                writeLine();
+                var sourceMappingURL = sourceMap.getSourceMappingURL();
+                if (sourceMappingURL) {
+                    write("//# sourceMappingURL=" + sourceMappingURL);
+                }
+                writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, compilerOptions.emitBOM, sourceFiles);
+                sourceMap.reset();
+                writer.reset();
+                currentSourceFile = undefined;
+                currentText = undefined;
+                currentLineMap = undefined;
+                exportFunctionForFile = undefined;
+                contextObjectForFile = undefined;
+                generatedNameSet = undefined;
+                nodeToGeneratedName = undefined;
+                decoratedClassAliases = undefined;
+                computedPropertyNamesToGeneratedNames = undefined;
+                convertedLoopState = undefined;
+                extendsEmitted = false;
+                decorateEmitted = false;
+                paramEmitted = false;
+                awaiterEmitted = false;
+                assignEmitted = false;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                externalImports = undefined;
+                exportSpecifiers = undefined;
+                exportEquals = undefined;
+                hasExportStarsToExportValues = undefined;
+                detachedCommentsInfo = undefined;
+                sourceMapData = undefined;
+                isEs6Module = false;
+                renamedDependencies = undefined;
+                isCurrentFileExternalModule = false;
+            }
+            function emitSourceFile(sourceFile) {
+                currentSourceFile = sourceFile;
+                currentText = sourceFile.text;
+                currentLineMap = ts.getLineStarts(sourceFile);
+                exportFunctionForFile = undefined;
+                contextObjectForFile = undefined;
+                isEs6Module = sourceFile.symbol && sourceFile.symbol.exports && !!sourceFile.symbol.exports["___esModule"];
+                renamedDependencies = sourceFile.renamedDependencies;
+                currentFileIdentifiers = sourceFile.identifiers;
+                isCurrentFileExternalModule = ts.isExternalModule(sourceFile);
+                setSourceFile(sourceFile);
+                emitNodeWithCommentsAndWithoutSourcemap(sourceFile);
+            }
+            function isUniqueName(name) {
+                return !resolver.hasGlobalName(name) &&
+                    !ts.hasProperty(currentFileIdentifiers, name) &&
+                    !ts.hasProperty(generatedNameSet, name);
+            }
+            function makeTempVariableName(flags) {
+                if (flags && !(tempFlags & flags)) {
+                    var name_24 = flags === 268435456 ? "_i" : "_n";
+                    if (isUniqueName(name_24)) {
+                        tempFlags |= flags;
+                        return name_24;
+                    }
+                }
+                while (true) {
+                    var count = tempFlags & 268435455;
+                    tempFlags++;
+                    if (count !== 8 && count !== 13) {
+                        var name_25 = count < 26 ? "_" + String.fromCharCode(97 + count) : "_" + (count - 26);
+                        if (isUniqueName(name_25)) {
+                            return name_25;
+                        }
+                    }
+                }
+            }
+            function makeUniqueName(baseName) {
+                if (baseName.charCodeAt(baseName.length - 1) !== 95) {
+                    baseName += "_";
+                }
+                var i = 1;
+                while (true) {
+                    var generatedName = baseName + i;
+                    if (isUniqueName(generatedName)) {
+                        return generatedNameSet[generatedName] = generatedName;
+                    }
+                    i++;
+                }
+            }
+            function generateNameForModuleOrEnum(node) {
+                var name = node.name.text;
+                return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
+            }
+            function generateNameForImportOrExportDeclaration(node) {
+                var expr = ts.getExternalModuleName(node);
+                var baseName = expr.kind === 9 ?
+                    ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module";
+                return makeUniqueName(baseName);
+            }
+            function generateNameForExportDefault() {
+                return makeUniqueName("default");
+            }
+            function generateNameForClassExpression() {
+                return makeUniqueName("class");
+            }
+            function generateNameForNode(node) {
+                switch (node.kind) {
+                    case 69:
+                        return makeUniqueName(node.text);
+                    case 225:
+                    case 224:
+                        return generateNameForModuleOrEnum(node);
+                    case 230:
+                    case 236:
+                        return generateNameForImportOrExportDeclaration(node);
+                    case 220:
+                    case 221:
+                    case 235:
+                        return generateNameForExportDefault();
+                    case 192:
+                        return generateNameForClassExpression();
+                }
+            }
+            function getGeneratedNameForNode(node) {
+                var id = ts.getNodeId(node);
+                return nodeToGeneratedName[id] || (nodeToGeneratedName[id] = ts.unescapeIdentifier(generateNameForNode(node)));
+            }
+            function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) {
+                if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
+                    ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), false, sourceFiles);
+                }
+                if (sourceMapDataList) {
+                    sourceMapDataList.push(sourceMap.getSourceMapData());
+                }
+                ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles);
+            }
+            function createTempVariable(flags) {
+                var result = ts.createSynthesizedNode(69);
+                result.text = makeTempVariableName(flags);
+                return result;
+            }
+            function recordTempDeclaration(name) {
+                if (!tempVariables) {
+                    tempVariables = [];
+                }
+                tempVariables.push(name);
+            }
+            function createAndRecordTempVariable(flags) {
+                var temp = createTempVariable(flags);
+                recordTempDeclaration(temp);
+                return temp;
+            }
+            function emitTempDeclarations(newLine) {
+                if (tempVariables) {
+                    if (newLine) {
+                        writeLine();
+                    }
+                    else {
+                        write(" ");
+                    }
+                    write("var ");
+                    emitCommaList(tempVariables);
+                    write(";");
+                }
+            }
+            function emitToken(tokenKind, startPos, emitFn) {
+                var tokenStartPos = ts.skipTrivia(currentText, startPos);
+                emitPos(tokenStartPos);
+                var tokenString = ts.tokenToString(tokenKind);
+                if (emitFn) {
+                    emitFn();
+                }
+                else {
+                    write(tokenString);
+                }
+                var tokenEndPos = tokenStartPos + tokenString.length;
+                emitPos(tokenEndPos);
+                return tokenEndPos;
+            }
+            function emitOptional(prefix, node) {
+                if (node) {
+                    write(prefix);
+                    emit(node);
+                }
+            }
+            function emitParenthesizedIf(node, parenthesized) {
+                if (parenthesized) {
+                    write("(");
+                }
+                emit(node);
+                if (parenthesized) {
+                    write(")");
+                }
+            }
+            function emitLinePreservingList(parent, nodes, allowTrailingComma, spacesBetweenBraces) {
+                ts.Debug.assert(nodes.length > 0);
+                increaseIndent();
+                if (nodeStartPositionsAreOnSameLine(parent, nodes[0])) {
+                    if (spacesBetweenBraces) {
+                        write(" ");
+                    }
+                }
+                else {
+                    writeLine();
+                }
+                for (var i = 0, n = nodes.length; i < n; i++) {
+                    if (i) {
+                        if (nodeEndIsOnSameLineAsNodeStart(nodes[i - 1], nodes[i])) {
+                            write(", ");
+                        }
+                        else {
+                            write(",");
+                            writeLine();
+                        }
+                    }
+                    emit(nodes[i]);
+                }
+                if (nodes.hasTrailingComma && allowTrailingComma) {
+                    write(",");
+                }
+                decreaseIndent();
+                if (nodeEndPositionsAreOnSameLine(parent, ts.lastOrUndefined(nodes))) {
+                    if (spacesBetweenBraces) {
+                        write(" ");
+                    }
+                }
+                else {
+                    writeLine();
+                }
+            }
+            function emitList(nodes, start, count, multiLine, trailingComma, leadingComma, noTrailingNewLine, emitNode) {
+                if (!emitNode) {
+                    emitNode = emit;
+                }
+                for (var i = 0; i < count; i++) {
+                    if (multiLine) {
+                        if (i || leadingComma) {
+                            write(",");
+                        }
+                        writeLine();
+                    }
+                    else {
+                        if (i || leadingComma) {
+                            write(", ");
+                        }
+                    }
+                    var node = nodes[start + i];
+                    emitTrailingCommentsOfPosition(node.pos);
+                    emitNode(node);
+                    leadingComma = true;
+                }
+                if (trailingComma) {
+                    write(",");
+                }
+                if (multiLine && !noTrailingNewLine) {
+                    writeLine();
+                }
+                return count;
+            }
+            function emitCommaList(nodes) {
+                if (nodes) {
+                    emitList(nodes, 0, nodes.length, false, false);
+                }
+            }
+            function emitLines(nodes) {
+                emitLinesStartingAt(nodes, 0);
+            }
+            function emitLinesStartingAt(nodes, startIndex) {
+                for (var i = startIndex; i < nodes.length; i++) {
+                    writeLine();
+                    emit(nodes[i]);
+                }
+            }
+            function isBinaryOrOctalIntegerLiteral(node, text) {
+                if (node.kind === 8 && text.length > 1) {
+                    switch (text.charCodeAt(1)) {
+                        case 98:
+                        case 66:
+                        case 111:
+                        case 79:
+                            return true;
+                    }
+                }
+                return false;
+            }
+            function emitLiteral(node) {
+                var text = getLiteralText(node);
+                if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap) && (node.kind === 9 || ts.isTemplateLiteralKind(node.kind))) {
+                    writer.writeLiteral(text);
+                }
+                else if (languageVersion < 2 && isBinaryOrOctalIntegerLiteral(node, text)) {
+                    write(node.text);
+                }
+                else {
+                    write(text);
+                }
+            }
+            function getLiteralText(node) {
+                if (languageVersion < 2 && (ts.isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) {
+                    return getQuotedEscapedLiteralText('"', node.text, '"');
+                }
+                if (node.parent) {
+                    return ts.getTextOfNodeFromSourceText(currentText, node);
+                }
+                switch (node.kind) {
+                    case 9:
+                        return getQuotedEscapedLiteralText('"', node.text, '"');
+                    case 11:
+                        return getQuotedEscapedLiteralText("`", node.text, "`");
+                    case 12:
+                        return getQuotedEscapedLiteralText("`", node.text, "${");
+                    case 13:
+                        return getQuotedEscapedLiteralText("}", node.text, "${");
+                    case 14:
+                        return getQuotedEscapedLiteralText("}", node.text, "`");
+                    case 8:
+                        return node.text;
+                }
+                ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
+            }
+            function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) {
+                return leftQuote + ts.escapeNonAsciiCharacters(ts.escapeString(text)) + rightQuote;
+            }
+            function emitDownlevelRawTemplateLiteral(node) {
+                var text = ts.getTextOfNodeFromSourceText(currentText, node);
+                var isLast = node.kind === 11 || node.kind === 14;
+                text = text.substring(1, text.length - (isLast ? 1 : 2));
+                text = text.replace(/\r\n?/g, "\n");
+                text = ts.escapeString(text);
+                write("\"" + text + "\"");
+            }
+            function emitDownlevelTaggedTemplateArray(node, literalEmitter) {
+                write("[");
+                if (node.template.kind === 11) {
+                    literalEmitter(node.template);
+                }
+                else {
+                    literalEmitter(node.template.head);
+                    ts.forEach(node.template.templateSpans, function (child) {
+                        write(", ");
+                        literalEmitter(child.literal);
+                    });
+                }
+                write("]");
+            }
+            function emitDownlevelTaggedTemplate(node) {
+                var tempVariable = createAndRecordTempVariable(0);
+                write("(");
+                emit(tempVariable);
+                write(" = ");
+                emitDownlevelTaggedTemplateArray(node, emit);
+                write(", ");
+                emit(tempVariable);
+                write(".raw = ");
+                emitDownlevelTaggedTemplateArray(node, emitDownlevelRawTemplateLiteral);
+                write(", ");
+                emitParenthesizedIf(node.tag, needsParenthesisForPropertyAccessOrInvocation(node.tag));
+                write("(");
+                emit(tempVariable);
+                if (node.template.kind === 189) {
+                    ts.forEach(node.template.templateSpans, function (templateSpan) {
+                        write(", ");
+                        var needsParens = templateSpan.expression.kind === 187
+                            && templateSpan.expression.operatorToken.kind === 24;
+                        emitParenthesizedIf(templateSpan.expression, needsParens);
+                    });
+                }
+                write("))");
+            }
+            function emitTemplateExpression(node) {
+                if (languageVersion >= 2) {
+                    ts.forEachChild(node, emit);
+                    return;
+                }
+                var emitOuterParens = ts.isExpression(node.parent)
+                    && templateNeedsParens(node, node.parent);
+                if (emitOuterParens) {
+                    write("(");
+                }
+                var headEmitted = false;
+                if (shouldEmitTemplateHead()) {
+                    emitLiteral(node.head);
+                    headEmitted = true;
+                }
+                for (var i = 0, n = node.templateSpans.length; i < n; i++) {
+                    var templateSpan = node.templateSpans[i];
+                    var needsParens = templateSpan.expression.kind !== 178
+                        && comparePrecedenceToBinaryPlus(templateSpan.expression) !== 1;
+                    if (i > 0 || headEmitted) {
+                        write(" + ");
+                    }
+                    emitParenthesizedIf(templateSpan.expression, needsParens);
+                    if (templateSpan.literal.text.length !== 0) {
+                        write(" + ");
+                        emitLiteral(templateSpan.literal);
+                    }
+                }
+                if (emitOuterParens) {
+                    write(")");
+                }
+                function shouldEmitTemplateHead() {
+                    ts.Debug.assert(node.templateSpans.length !== 0);
+                    return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0;
+                }
+                function templateNeedsParens(template, parent) {
+                    switch (parent.kind) {
+                        case 174:
+                        case 175:
+                            return parent.expression === template;
+                        case 176:
+                        case 178:
+                            return false;
+                        default:
+                            return comparePrecedenceToBinaryPlus(parent) !== -1;
+                    }
+                }
+                function comparePrecedenceToBinaryPlus(expression) {
+                    switch (expression.kind) {
+                        case 187:
+                            switch (expression.operatorToken.kind) {
+                                case 37:
+                                case 39:
+                                case 40:
+                                    return 1;
+                                case 35:
+                                case 36:
+                                    return 0;
+                                default:
+                                    return -1;
+                            }
+                        case 190:
+                        case 188:
+                            return -1;
+                        default:
+                            return 1;
+                    }
+                }
+            }
+            function emitTemplateSpan(span) {
+                emit(span.expression);
+                emit(span.literal);
+            }
+            function jsxEmitReact(node) {
+                function emitTagName(name) {
+                    if (name.kind === 69 && ts.isIntrinsicJsxName(name.text)) {
+                        write('"');
+                        emit(name);
+                        write('"');
+                    }
+                    else {
+                        emit(name);
+                    }
+                }
+                function emitAttributeName(name) {
+                    if (/^[A-Za-z_]\w*$/.test(name.text)) {
+                        emit(name);
+                    }
+                    else {
+                        write('"');
+                        emit(name);
+                        write('"');
+                    }
+                }
+                function emitJsxAttribute(node) {
+                    emitAttributeName(node.name);
+                    write(": ");
+                    if (node.initializer) {
+                        emit(node.initializer);
+                    }
+                    else {
+                        write("true");
+                    }
+                }
+                function emitJsxElement(openingNode, children) {
+                    var syntheticReactRef = ts.createSynthesizedNode(69);
+                    syntheticReactRef.text = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
+                    syntheticReactRef.parent = openingNode;
+                    emitLeadingComments(openingNode);
+                    emitExpressionIdentifier(syntheticReactRef);
+                    write(".createElement(");
+                    emitTagName(openingNode.tagName);
+                    write(", ");
+                    if (openingNode.attributes.length === 0) {
+                        write("null");
+                    }
+                    else {
+                        var attrs = openingNode.attributes;
+                        if (ts.forEach(attrs, function (attr) { return attr.kind === 247; })) {
+                            write("__assign(");
+                            var haveOpenedObjectLiteral = false;
+                            for (var i = 0; i < attrs.length; i++) {
+                                if (attrs[i].kind === 247) {
+                                    if (i === 0) {
+                                        write("{}, ");
+                                    }
+                                    if (haveOpenedObjectLiteral) {
+                                        write("}");
+                                        haveOpenedObjectLiteral = false;
+                                    }
+                                    if (i > 0) {
+                                        write(", ");
+                                    }
+                                    emit(attrs[i].expression);
+                                }
+                                else {
+                                    ts.Debug.assert(attrs[i].kind === 246);
+                                    if (haveOpenedObjectLiteral) {
+                                        write(", ");
+                                    }
+                                    else {
+                                        haveOpenedObjectLiteral = true;
+                                        if (i > 0) {
+                                            write(", ");
+                                        }
+                                        write("{");
+                                    }
+                                    emitJsxAttribute(attrs[i]);
+                                }
+                            }
+                            if (haveOpenedObjectLiteral)
+                                write("}");
+                            write(")");
+                        }
+                        else {
+                            write("{");
+                            for (var i = 0, n = attrs.length; i < n; i++) {
+                                if (i > 0) {
+                                    write(", ");
+                                }
+                                emitJsxAttribute(attrs[i]);
+                            }
+                            write("}");
+                        }
+                    }
+                    if (children) {
+                        var firstChild = void 0;
+                        var multipleEmittableChildren = false;
+                        for (var i = 0, n = children.length; i < n; i++) {
+                            var jsxChild = children[i];
+                            if (isJsxChildEmittable(jsxChild)) {
+                                if (!firstChild) {
+                                    write(", ");
+                                    firstChild = jsxChild;
+                                }
+                                else {
+                                    if (!multipleEmittableChildren) {
+                                        multipleEmittableChildren = true;
+                                        increaseIndent();
+                                        writeLine();
+                                        emit(firstChild);
+                                    }
+                                    write(", ");
+                                    writeLine();
+                                    emit(jsxChild);
+                                }
+                            }
+                        }
+                        if (multipleEmittableChildren) {
+                            decreaseIndent();
+                        }
+                        else if (firstChild) {
+                            if (firstChild.kind !== 241 && firstChild.kind !== 242) {
+                                emit(firstChild);
+                            }
+                            else {
+                                increaseIndent();
+                                writeLine();
+                                emit(firstChild);
+                                writeLine();
+                                decreaseIndent();
+                            }
+                        }
+                    }
+                    write(")");
+                    emitTrailingComments(openingNode);
+                }
+                if (node.kind === 241) {
+                    emitJsxElement(node.openingElement, node.children);
+                }
+                else {
+                    ts.Debug.assert(node.kind === 242);
+                    emitJsxElement(node);
+                }
+            }
+            function jsxEmitPreserve(node) {
+                function emitJsxAttribute(node) {
+                    emit(node.name);
+                    if (node.initializer) {
+                        write("=");
+                        emit(node.initializer);
+                    }
+                }
+                function emitJsxSpreadAttribute(node) {
+                    write("{...");
+                    emit(node.expression);
+                    write("}");
+                }
+                function emitAttributes(attribs) {
+                    for (var i = 0, n = attribs.length; i < n; i++) {
+                        if (i > 0) {
+                            write(" ");
+                        }
+                        if (attribs[i].kind === 247) {
+                            emitJsxSpreadAttribute(attribs[i]);
+                        }
+                        else {
+                            ts.Debug.assert(attribs[i].kind === 246);
+                            emitJsxAttribute(attribs[i]);
+                        }
+                    }
+                }
+                function emitJsxOpeningOrSelfClosingElement(node) {
+                    write("<");
+                    emit(node.tagName);
+                    if (node.attributes.length > 0 || (node.kind === 242)) {
+                        write(" ");
+                    }
+                    emitAttributes(node.attributes);
+                    if (node.kind === 242) {
+                        write("/>");
+                    }
+                    else {
+                        write(">");
+                    }
+                }
+                function emitJsxClosingElement(node) {
+                    write("</");
+                    emit(node.tagName);
+                    write(">");
+                }
+                function emitJsxElement(node) {
+                    emitJsxOpeningOrSelfClosingElement(node.openingElement);
+                    for (var i = 0, n = node.children.length; i < n; i++) {
+                        emit(node.children[i]);
+                    }
+                    emitJsxClosingElement(node.closingElement);
+                }
+                if (node.kind === 241) {
+                    emitJsxElement(node);
+                }
+                else {
+                    ts.Debug.assert(node.kind === 242);
+                    emitJsxOpeningOrSelfClosingElement(node);
+                }
+            }
+            function emitExpressionForPropertyName(node) {
+                ts.Debug.assert(node.kind !== 169);
+                if (node.kind === 9) {
+                    emitLiteral(node);
+                }
+                else if (node.kind === 140) {
+                    if (ts.nodeIsDecorated(node.parent)) {
+                        if (!computedPropertyNamesToGeneratedNames) {
+                            computedPropertyNamesToGeneratedNames = [];
+                        }
+                        var generatedName = computedPropertyNamesToGeneratedNames[ts.getNodeId(node)];
+                        if (generatedName) {
+                            write(generatedName);
+                            return;
+                        }
+                        generatedName = createAndRecordTempVariable(0).text;
+                        computedPropertyNamesToGeneratedNames[ts.getNodeId(node)] = generatedName;
+                        write(generatedName);
+                        write(" = ");
+                    }
+                    emit(node.expression);
+                }
+                else {
+                    write('"');
+                    if (node.kind === 8) {
+                        write(node.text);
+                    }
+                    else {
+                        writeTextOfNode(currentText, node);
+                    }
+                    write('"');
+                }
+            }
+            function isExpressionIdentifier(node) {
+                var parent = node.parent;
+                switch (parent.kind) {
+                    case 170:
+                    case 195:
+                    case 184:
+                    case 187:
+                    case 174:
+                    case 249:
+                    case 140:
+                    case 188:
+                    case 143:
+                    case 181:
+                    case 204:
+                    case 173:
+                    case 235:
+                    case 202:
+                    case 194:
+                    case 206:
+                    case 207:
+                    case 208:
+                    case 203:
+                    case 245:
+                    case 242:
+                    case 243:
+                    case 247:
+                    case 248:
+                    case 175:
+                    case 196:
+                    case 178:
+                    case 186:
+                    case 185:
+                    case 211:
+                    case 254:
+                    case 191:
+                    case 213:
+                    case 176:
+                    case 197:
+                    case 215:
+                    case 177:
+                    case 182:
+                    case 183:
+                    case 205:
+                    case 212:
+                    case 190:
+                        return true;
+                    case 169:
+                    case 255:
+                    case 142:
+                    case 253:
+                    case 145:
+                    case 218:
+                        return parent.initializer === node;
+                    case 172:
+                        return parent.expression === node;
+                    case 180:
+                    case 179:
+                        return parent.body === node;
+                    case 229:
+                        return parent.moduleReference === node;
+                    case 139:
+                        return parent.left === node;
+                }
+                return false;
+            }
+            function emitExpressionIdentifier(node) {
+                var container = resolver.getReferencedExportContainer(node);
+                if (container) {
+                    if (container.kind === 256) {
+                        if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
+                            write("exports.");
+                        }
+                    }
+                    else {
+                        write(getGeneratedNameForNode(container));
+                        write(".");
+                    }
+                }
+                else {
+                    if (modulekind !== ts.ModuleKind.ES6) {
+                        var declaration = resolver.getReferencedImportDeclaration(node);
+                        if (declaration) {
+                            if (declaration.kind === 231) {
+                                write(getGeneratedNameForNode(declaration.parent));
+                                write(languageVersion === 0 ? '["default"]' : ".default");
+                                return;
+                            }
+                            else if (declaration.kind === 234) {
+                                write(getGeneratedNameForNode(declaration.parent.parent.parent));
+                                var name_26 = declaration.propertyName || declaration.name;
+                                var identifier = ts.getTextOfNodeFromSourceText(currentText, name_26);
+                                if (languageVersion === 0 && identifier === "default") {
+                                    write('["default"]');
+                                }
+                                else {
+                                    write(".");
+                                    write(identifier);
+                                }
+                                return;
+                            }
+                        }
+                    }
+                    if (languageVersion < 2) {
+                        var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
+                        if (declaration) {
+                            write(getGeneratedNameForNode(declaration.name));
+                            return;
+                        }
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & 1048576) {
+                        var declaration = resolver.getReferencedValueDeclaration(node);
+                        if (declaration) {
+                            var classAlias = decoratedClassAliases[ts.getNodeId(declaration)];
+                            if (classAlias !== undefined) {
+                                write(classAlias);
+                                return;
+                            }
+                        }
+                    }
+                }
+                if (ts.nodeIsSynthesized(node)) {
+                    write(node.text);
+                }
+                else {
+                    writeTextOfNode(currentText, node);
+                }
+            }
+            function isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node) {
+                if (languageVersion < 2) {
+                    var parent_13 = node.parent;
+                    switch (parent_13.kind) {
+                        case 169:
+                        case 221:
+                        case 224:
+                        case 218:
+                            return parent_13.name === node && resolver.isDeclarationWithCollidingName(parent_13);
+                    }
+                }
+                return false;
+            }
+            function emitIdentifier(node) {
+                if (convertedLoopState) {
+                    if (node.text == "arguments" && resolver.isArgumentsLocalBinding(node)) {
+                        var name_27 = convertedLoopState.argumentsName || (convertedLoopState.argumentsName = makeUniqueName("arguments"));
+                        write(name_27);
+                        return;
+                    }
+                }
+                if (!node.parent) {
+                    write(node.text);
+                }
+                else if (isExpressionIdentifier(node)) {
+                    emitExpressionIdentifier(node);
+                }
+                else if (isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node)) {
+                    write(getGeneratedNameForNode(node));
+                }
+                else if (ts.nodeIsSynthesized(node)) {
+                    write(node.text);
+                }
+                else {
+                    writeTextOfNode(currentText, node);
+                }
+            }
+            function emitThis(node) {
+                if (resolver.getNodeCheckFlags(node) & 2) {
+                    write("_this");
+                }
+                else if (convertedLoopState) {
+                    write(convertedLoopState.thisName || (convertedLoopState.thisName = makeUniqueName("this")));
+                }
+                else {
+                    write("this");
+                }
+            }
+            function emitSuper(node) {
+                if (languageVersion >= 2) {
+                    write("super");
+                }
+                else {
+                    var flags = resolver.getNodeCheckFlags(node);
+                    if (flags & 256) {
+                        write("_super.prototype");
+                    }
+                    else {
+                        write("_super");
+                    }
+                }
+            }
+            function emitObjectBindingPattern(node) {
+                write("{ ");
+                var elements = node.elements;
+                emitList(elements, 0, elements.length, false, elements.hasTrailingComma);
+                write(" }");
+            }
+            function emitArrayBindingPattern(node) {
+                write("[");
+                var elements = node.elements;
+                emitList(elements, 0, elements.length, false, elements.hasTrailingComma);
+                write("]");
+            }
+            function emitBindingElement(node) {
+                if (node.propertyName) {
+                    emit(node.propertyName);
+                    write(": ");
+                }
+                if (node.dotDotDotToken) {
+                    write("...");
+                }
+                if (ts.isBindingPattern(node.name)) {
+                    emit(node.name);
+                }
+                else {
+                    emitModuleMemberName(node);
+                }
+                emitOptional(" = ", node.initializer);
+            }
+            function emitSpreadElementExpression(node) {
+                write("...");
+                emit(node.expression);
+            }
+            function emitYieldExpression(node) {
+                write(ts.tokenToString(114));
+                if (node.asteriskToken) {
+                    write("*");
+                }
+                if (node.expression) {
+                    write(" ");
+                    emit(node.expression);
+                }
+            }
+            function emitAwaitExpression(node) {
+                var needsParenthesis = needsParenthesisForAwaitExpressionAsYield(node);
+                if (needsParenthesis) {
+                    write("(");
+                }
+                write(ts.tokenToString(114));
+                write(" ");
+                emit(node.expression);
+                if (needsParenthesis) {
+                    write(")");
+                }
+            }
+            function needsParenthesisForAwaitExpressionAsYield(node) {
+                if (node.parent.kind === 187 && !ts.isAssignmentOperator(node.parent.operatorToken.kind)) {
+                    return true;
+                }
+                else if (node.parent.kind === 188 && node.parent.condition === node) {
+                    return true;
+                }
+                return false;
+            }
+            function needsParenthesisForPropertyAccessOrInvocation(node) {
+                switch (node.kind) {
+                    case 69:
+                    case 170:
+                    case 172:
+                    case 173:
+                    case 174:
+                    case 178:
+                        return false;
+                }
+                return true;
+            }
+            function emitListWithSpread(elements, needsUniqueCopy, multiLine, trailingComma, useConcat) {
+                var pos = 0;
+                var group = 0;
+                var length = elements.length;
+                while (pos < length) {
+                    if (group === 1 && useConcat) {
+                        write(".concat(");
+                    }
+                    else if (group > 0) {
+                        write(", ");
+                    }
+                    var e = elements[pos];
+                    if (e.kind === 191) {
+                        e = e.expression;
+                        emitParenthesizedIf(e, group === 0 && needsParenthesisForPropertyAccessOrInvocation(e));
+                        pos++;
+                        if (pos === length && group === 0 && needsUniqueCopy && e.kind !== 170) {
+                            write(".slice()");
+                        }
+                    }
+                    else {
+                        var i = pos;
+                        while (i < length && elements[i].kind !== 191) {
+                            i++;
+                        }
+                        write("[");
+                        if (multiLine) {
+                            increaseIndent();
+                        }
+                        emitList(elements, pos, i - pos, multiLine, trailingComma && i === length);
+                        if (multiLine) {
+                            decreaseIndent();
+                        }
+                        write("]");
+                        pos = i;
+                    }
+                    group++;
+                }
+                if (group > 1) {
+                    if (useConcat) {
+                        write(")");
+                    }
+                }
+            }
+            function isSpreadElementExpression(node) {
+                return node.kind === 191;
+            }
+            function emitArrayLiteral(node) {
+                var elements = node.elements;
+                if (elements.length === 0) {
+                    write("[]");
+                }
+                else if (languageVersion >= 2 || !ts.forEach(elements, isSpreadElementExpression)) {
+                    write("[");
+                    emitLinePreservingList(node, node.elements, elements.hasTrailingComma, false);
+                    write("]");
+                }
+                else {
+                    emitListWithSpread(elements, true, node.multiLine, elements.hasTrailingComma, true);
+                }
+            }
+            function emitObjectLiteralBody(node, numElements) {
+                if (numElements === 0) {
+                    write("{}");
+                    return;
+                }
+                write("{");
+                if (numElements > 0) {
+                    var properties = node.properties;
+                    if (numElements === properties.length) {
+                        emitLinePreservingList(node, properties, languageVersion >= 1, true);
+                    }
+                    else {
+                        var multiLine = node.multiLine;
+                        if (!multiLine) {
+                            write(" ");
+                        }
+                        else {
+                            increaseIndent();
+                        }
+                        emitList(properties, 0, numElements, multiLine, false);
+                        if (!multiLine) {
+                            write(" ");
+                        }
+                        else {
+                            decreaseIndent();
+                        }
+                    }
+                }
+                write("}");
+            }
+            function emitDownlevelObjectLiteralWithComputedProperties(node, firstComputedPropertyIndex) {
+                var multiLine = node.multiLine;
+                var properties = node.properties;
+                write("(");
+                if (multiLine) {
+                    increaseIndent();
+                }
+                var tempVar = createAndRecordTempVariable(0);
+                emit(tempVar);
+                write(" = ");
+                emitObjectLiteralBody(node, firstComputedPropertyIndex);
+                for (var i = firstComputedPropertyIndex, n = properties.length; i < n; i++) {
+                    writeComma();
+                    var property = properties[i];
+                    emitStart(property);
+                    if (property.kind === 149 || property.kind === 150) {
+                        var accessors = ts.getAllAccessorDeclarations(node.properties, property);
+                        if (property !== accessors.firstAccessor) {
+                            continue;
+                        }
+                        write("Object.defineProperty(");
+                        emit(tempVar);
+                        write(", ");
+                        emitStart(property.name);
+                        emitExpressionForPropertyName(property.name);
+                        emitEnd(property.name);
+                        write(", {");
+                        increaseIndent();
+                        if (accessors.getAccessor) {
+                            writeLine();
+                            emitLeadingComments(accessors.getAccessor);
+                            write("get: ");
+                            emitStart(accessors.getAccessor);
+                            write("function ");
+                            emitSignatureAndBody(accessors.getAccessor);
+                            emitEnd(accessors.getAccessor);
+                            emitTrailingComments(accessors.getAccessor);
+                            write(",");
+                        }
+                        if (accessors.setAccessor) {
+                            writeLine();
+                            emitLeadingComments(accessors.setAccessor);
+                            write("set: ");
+                            emitStart(accessors.setAccessor);
+                            write("function ");
+                            emitSignatureAndBody(accessors.setAccessor);
+                            emitEnd(accessors.setAccessor);
+                            emitTrailingComments(accessors.setAccessor);
+                            write(",");
+                        }
+                        writeLine();
+                        write("enumerable: true,");
+                        writeLine();
+                        write("configurable: true");
+                        decreaseIndent();
+                        writeLine();
+                        write("})");
+                        emitEnd(property);
+                    }
+                    else {
+                        emitLeadingComments(property);
+                        emitStart(property.name);
+                        emit(tempVar);
+                        emitMemberAccessForPropertyName(property.name);
+                        emitEnd(property.name);
+                        write(" = ");
+                        if (property.kind === 253) {
+                            emit(property.initializer);
+                        }
+                        else if (property.kind === 254) {
+                            emitExpressionIdentifier(property.name);
+                        }
+                        else if (property.kind === 147) {
+                            emitFunctionDeclaration(property);
+                        }
+                        else {
+                            ts.Debug.fail("ObjectLiteralElement type not accounted for: " + property.kind);
+                        }
+                    }
+                    emitEnd(property);
+                }
+                writeComma();
+                emit(tempVar);
+                if (multiLine) {
+                    decreaseIndent();
+                    writeLine();
+                }
+                write(")");
+                function writeComma() {
+                    if (multiLine) {
+                        write(",");
+                        writeLine();
+                    }
+                    else {
+                        write(", ");
+                    }
+                }
+            }
+            function emitObjectLiteral(node) {
+                var properties = node.properties;
+                if (languageVersion < 2) {
+                    var numProperties = properties.length;
+                    var numInitialNonComputedProperties = numProperties;
+                    for (var i = 0, n = properties.length; i < n; i++) {
+                        if (properties[i].name.kind === 140) {
+                            numInitialNonComputedProperties = i;
+                            break;
+                        }
+                    }
+                    var hasComputedProperty = numInitialNonComputedProperties !== properties.length;
+                    if (hasComputedProperty) {
+                        emitDownlevelObjectLiteralWithComputedProperties(node, numInitialNonComputedProperties);
+                        return;
+                    }
+                }
+                emitObjectLiteralBody(node, properties.length);
+            }
+            function createBinaryExpression(left, operator, right, startsOnNewLine) {
+                var result = ts.createSynthesizedNode(187, startsOnNewLine);
+                result.operatorToken = ts.createSynthesizedNode(operator);
+                result.left = left;
+                result.right = right;
+                return result;
+            }
+            function createPropertyAccessExpression(expression, name) {
+                var result = ts.createSynthesizedNode(172);
+                result.expression = parenthesizeForAccess(expression);
+                result.dotToken = ts.createSynthesizedNode(21);
+                result.name = name;
+                return result;
+            }
+            function createElementAccessExpression(expression, argumentExpression) {
+                var result = ts.createSynthesizedNode(173);
+                result.expression = parenthesizeForAccess(expression);
+                result.argumentExpression = argumentExpression;
+                return result;
+            }
+            function parenthesizeForAccess(expr) {
+                while (expr.kind === 177 ||
+                    expr.kind === 195 ||
+                    expr.kind === 196) {
+                    expr = expr.expression;
+                }
+                if (ts.isLeftHandSideExpression(expr) &&
+                    expr.kind !== 175 &&
+                    expr.kind !== 8) {
+                    return expr;
+                }
+                var node = ts.createSynthesizedNode(178);
+                node.expression = expr;
+                return node;
+            }
+            function emitComputedPropertyName(node) {
+                write("[");
+                emitExpressionForPropertyName(node);
+                write("]");
+            }
+            function emitMethod(node) {
+                if (languageVersion >= 2 && node.asteriskToken) {
+                    write("*");
+                }
+                emit(node.name);
+                if (languageVersion < 2) {
+                    write(": function ");
+                }
+                emitSignatureAndBody(node);
+            }
+            function emitPropertyAssignment(node) {
+                emit(node.name);
+                write(": ");
+                emitTrailingCommentsOfPosition(node.initializer.pos);
+                emit(node.initializer);
+            }
+            function isNamespaceExportReference(node) {
+                var container = resolver.getReferencedExportContainer(node);
+                return container && container.kind !== 256;
+            }
+            function isImportedReference(node) {
+                var declaration = resolver.getReferencedImportDeclaration(node);
+                return declaration && (declaration.kind === 231 || declaration.kind === 234);
+            }
+            function emitShorthandPropertyAssignment(node) {
+                writeTextOfNode(currentText, node.name);
+                if (languageVersion < 2 || (modulekind !== ts.ModuleKind.ES6 && isImportedReference(node.name)) || isNamespaceExportReference(node.name)) {
+                    write(": ");
+                    emit(node.name);
+                }
+                if (languageVersion >= 2 && node.objectAssignmentInitializer) {
+                    write(" = ");
+                    emit(node.objectAssignmentInitializer);
+                }
+            }
+            function tryEmitConstantValue(node) {
+                var constantValue = tryGetConstEnumValue(node);
+                if (constantValue !== undefined) {
+                    write(constantValue.toString());
+                    if (!compilerOptions.removeComments) {
+                        var propertyName = node.kind === 172 ? ts.declarationNameToString(node.name) : ts.getTextOfNode(node.argumentExpression);
+                        write(" /* " + propertyName + " */");
+                    }
+                    return true;
+                }
+                return false;
+            }
+            function tryGetConstEnumValue(node) {
+                if (compilerOptions.isolatedModules) {
+                    return undefined;
+                }
+                return node.kind === 172 || node.kind === 173
+                    ? resolver.getConstantValue(node)
+                    : undefined;
+            }
+            function indentIfOnDifferentLines(parent, node1, node2, valueToWriteWhenNotIndenting) {
+                var realNodesAreOnDifferentLines = !ts.nodeIsSynthesized(parent) && !nodeEndIsOnSameLineAsNodeStart(node1, node2);
+                var synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2);
+                if (realNodesAreOnDifferentLines || synthesizedNodeIsOnDifferentLine) {
+                    increaseIndent();
+                    writeLine();
+                    return true;
+                }
+                else {
+                    if (valueToWriteWhenNotIndenting) {
+                        write(valueToWriteWhenNotIndenting);
+                    }
+                    return false;
+                }
+            }
+            function emitPropertyAccess(node) {
+                if (tryEmitConstantValue(node)) {
+                    return;
+                }
+                if (languageVersion === 2 &&
+                    node.expression.kind === 95 &&
+                    isInAsyncMethodWithSuperInES6(node)) {
+                    var name_28 = ts.createSynthesizedNode(9);
+                    name_28.text = node.name.text;
+                    emitSuperAccessInAsyncMethod(node.expression, name_28);
+                    return;
+                }
+                emit(node.expression);
+                var indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, node.dotToken);
+                var shouldEmitSpace = false;
+                if (!indentedBeforeDot) {
+                    if (node.expression.kind === 8) {
+                        var text = ts.getTextOfNodeFromSourceText(currentText, node.expression);
+                        shouldEmitSpace = text.indexOf(ts.tokenToString(21)) < 0;
+                    }
+                    else {
+                        var constantValue = tryGetConstEnumValue(node.expression);
+                        shouldEmitSpace = isFinite(constantValue) && Math.floor(constantValue) === constantValue;
+                    }
+                }
+                if (shouldEmitSpace) {
+                    write(" .");
+                }
+                else {
+                    write(".");
+                }
+                var indentedAfterDot = indentIfOnDifferentLines(node, node.dotToken, node.name);
+                emit(node.name);
+                decreaseIndentIf(indentedBeforeDot, indentedAfterDot);
+            }
+            function emitQualifiedName(node) {
+                emit(node.left);
+                write(".");
+                emit(node.right);
+            }
+            function emitQualifiedNameAsExpression(node, useFallback) {
+                if (node.left.kind === 69) {
+                    emitEntityNameAsExpression(node.left, useFallback);
+                }
+                else if (useFallback) {
+                    var temp = createAndRecordTempVariable(0);
+                    write("(");
+                    emitNodeWithoutSourceMap(temp);
+                    write(" = ");
+                    emitEntityNameAsExpression(node.left, true);
+                    write(") && ");
+                    emitNodeWithoutSourceMap(temp);
+                }
+                else {
+                    emitEntityNameAsExpression(node.left, false);
+                }
+                write(".");
+                emit(node.right);
+            }
+            function emitEntityNameAsExpression(node, useFallback) {
+                switch (node.kind) {
+                    case 69:
+                        if (useFallback) {
+                            write("typeof ");
+                            emitExpressionIdentifier(node);
+                            write(" !== 'undefined' && ");
+                        }
+                        emitExpressionIdentifier(node);
+                        break;
+                    case 139:
+                        emitQualifiedNameAsExpression(node, useFallback);
+                        break;
+                    default:
+                        emitNodeWithoutSourceMap(node);
+                        break;
+                }
+            }
+            function emitIndexedAccess(node) {
+                if (tryEmitConstantValue(node)) {
+                    return;
+                }
+                if (languageVersion === 2 &&
+                    node.expression.kind === 95 &&
+                    isInAsyncMethodWithSuperInES6(node)) {
+                    emitSuperAccessInAsyncMethod(node.expression, node.argumentExpression);
+                    return;
+                }
+                emit(node.expression);
+                write("[");
+                emit(node.argumentExpression);
+                write("]");
+            }
+            function hasSpreadElement(elements) {
+                return ts.forEach(elements, function (e) { return e.kind === 191; });
+            }
+            function skipParentheses(node) {
+                while (node.kind === 178 ||
+                    node.kind === 177 ||
+                    node.kind === 195 ||
+                    node.kind === 196) {
+                    node = node.expression;
+                }
+                return node;
+            }
+            function emitCallTarget(node) {
+                if (node.kind === 69 || node.kind === 97 || node.kind === 95) {
+                    emit(node);
+                    return node;
+                }
+                var temp = createAndRecordTempVariable(0);
+                write("(");
+                emit(temp);
+                write(" = ");
+                emit(node);
+                write(")");
+                return temp;
+            }
+            function emitCallWithSpread(node) {
+                var target;
+                var expr = skipParentheses(node.expression);
+                if (expr.kind === 172) {
+                    target = emitCallTarget(expr.expression);
+                    write(".");
+                    emit(expr.name);
+                }
+                else if (expr.kind === 173) {
+                    target = emitCallTarget(expr.expression);
+                    write("[");
+                    emit(expr.argumentExpression);
+                    write("]");
+                }
+                else if (expr.kind === 95) {
+                    target = expr;
+                    write("_super");
+                }
+                else {
+                    emit(node.expression);
+                }
+                write(".apply(");
+                if (target) {
+                    if (target.kind === 95) {
+                        emitThis(target);
+                    }
+                    else {
+                        emit(target);
+                    }
+                }
+                else {
+                    write("void 0");
+                }
+                write(", ");
+                emitListWithSpread(node.arguments, false, false, false, true);
+                write(")");
+            }
+            function isInAsyncMethodWithSuperInES6(node) {
+                if (languageVersion === 2) {
+                    var container = ts.getSuperContainer(node, false);
+                    if (container && resolver.getNodeCheckFlags(container) & (2048 | 4096)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function emitSuperAccessInAsyncMethod(superNode, argumentExpression) {
+                var container = ts.getSuperContainer(superNode, false);
+                var isSuperBinding = resolver.getNodeCheckFlags(container) & 4096;
+                write("_super(");
+                emit(argumentExpression);
+                write(isSuperBinding ? ").value" : ")");
+            }
+            function emitCallExpression(node) {
+                if (languageVersion < 2 && hasSpreadElement(node.arguments)) {
+                    emitCallWithSpread(node);
+                    return;
+                }
+                var expression = node.expression;
+                var superCall = false;
+                var isAsyncMethodWithSuper = false;
+                if (expression.kind === 95) {
+                    emitSuper(expression);
+                    superCall = true;
+                }
+                else {
+                    superCall = ts.isSuperPropertyOrElementAccess(expression);
+                    isAsyncMethodWithSuper = superCall && isInAsyncMethodWithSuperInES6(node);
+                    emit(expression);
+                }
+                if (superCall && (languageVersion < 2 || isAsyncMethodWithSuper)) {
+                    write(".call(");
+                    emitThis(expression);
+                    if (node.arguments.length) {
+                        write(", ");
+                        emitCommaList(node.arguments);
+                    }
+                    write(")");
+                }
+                else {
+                    write("(");
+                    emitCommaList(node.arguments);
+                    write(")");
+                }
+            }
+            function emitNewExpression(node) {
+                write("new ");
+                if (languageVersion === 1 &&
+                    node.arguments &&
+                    hasSpreadElement(node.arguments)) {
+                    write("(");
+                    var target = emitCallTarget(node.expression);
+                    write(".bind.apply(");
+                    emit(target);
+                    write(", [void 0].concat(");
+                    emitListWithSpread(node.arguments, false, false, false, false);
+                    write(")))");
+                    write("()");
+                }
+                else {
+                    emit(node.expression);
+                    if (node.arguments) {
+                        write("(");
+                        emitCommaList(node.arguments);
+                        write(")");
+                    }
+                }
+            }
+            function emitTaggedTemplateExpression(node) {
+                if (languageVersion >= 2) {
+                    emit(node.tag);
+                    write(" ");
+                    emit(node.template);
+                }
+                else {
+                    emitDownlevelTaggedTemplate(node);
+                }
+            }
+            function emitParenExpression(node) {
+                if (!ts.nodeIsSynthesized(node) && node.parent.kind !== 180) {
+                    if (node.expression.kind === 177 ||
+                        node.expression.kind === 195 ||
+                        node.expression.kind === 196) {
+                        var operand = node.expression.expression;
+                        while (operand.kind === 177 ||
+                            operand.kind === 195 ||
+                            operand.kind === 196) {
+                            operand = operand.expression;
+                        }
+                        if (operand.kind !== 185 &&
+                            operand.kind !== 183 &&
+                            operand.kind !== 182 &&
+                            operand.kind !== 181 &&
+                            operand.kind !== 186 &&
+                            operand.kind !== 175 &&
+                            !(operand.kind === 174 && node.parent.kind === 175) &&
+                            !(operand.kind === 179 && node.parent.kind === 174) &&
+                            !(operand.kind === 8 && node.parent.kind === 172)) {
+                            emit(operand);
+                            return;
+                        }
+                    }
+                }
+                write("(");
+                emit(node.expression);
+                write(")");
+            }
+            function emitDeleteExpression(node) {
+                write(ts.tokenToString(78));
+                write(" ");
+                emit(node.expression);
+            }
+            function emitVoidExpression(node) {
+                write(ts.tokenToString(103));
+                write(" ");
+                emit(node.expression);
+            }
+            function emitTypeOfExpression(node) {
+                write(ts.tokenToString(101));
+                write(" ");
+                emit(node.expression);
+            }
+            function isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node) {
+                if (!isCurrentFileSystemExternalModule() || node.kind !== 69 || ts.nodeIsSynthesized(node)) {
+                    return false;
+                }
+                var isVariableDeclarationOrBindingElement = node.parent && (node.parent.kind === 218 || node.parent.kind === 169);
+                var targetDeclaration = isVariableDeclarationOrBindingElement
+                    ? node.parent
+                    : resolver.getReferencedValueDeclaration(node);
+                return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, true);
+            }
+            function isNameOfExportedDeclarationInNonES6Module(node) {
+                if (modulekind === ts.ModuleKind.System || node.kind !== 69 || ts.nodeIsSynthesized(node)) {
+                    return false;
+                }
+                return !exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, node.text);
+            }
+            function emitPrefixUnaryExpression(node) {
+                var isPlusPlusOrMinusMinus = (node.operator === 41
+                    || node.operator === 42);
+                var externalExportChanged = isPlusPlusOrMinusMinus &&
+                    isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
+                if (externalExportChanged) {
+                    write(exportFunctionForFile + "(\"");
+                    emitNodeWithoutSourceMap(node.operand);
+                    write("\", ");
+                }
+                var internalExportChanged = isPlusPlusOrMinusMinus &&
+                    isNameOfExportedDeclarationInNonES6Module(node.operand);
+                if (internalExportChanged) {
+                    emitAliasEqual(node.operand);
+                }
+                write(ts.tokenToString(node.operator));
+                if (node.operand.kind === 185) {
+                    var operand = node.operand;
+                    if (node.operator === 35 && (operand.operator === 35 || operand.operator === 41)) {
+                        write(" ");
+                    }
+                    else if (node.operator === 36 && (operand.operator === 36 || operand.operator === 42)) {
+                        write(" ");
+                    }
+                }
+                emit(node.operand);
+                if (externalExportChanged) {
+                    write(")");
+                }
+            }
+            function emitPostfixUnaryExpression(node) {
+                var externalExportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
+                var internalExportChanged = isNameOfExportedDeclarationInNonES6Module(node.operand);
+                if (externalExportChanged) {
+                    write("(" + exportFunctionForFile + "(\"");
+                    emitNodeWithoutSourceMap(node.operand);
+                    write("\", ");
+                    write(ts.tokenToString(node.operator));
+                    emit(node.operand);
+                    if (node.operator === 41) {
+                        write(") - 1)");
+                    }
+                    else {
+                        write(") + 1)");
+                    }
+                }
+                else if (internalExportChanged) {
+                    emitAliasEqual(node.operand);
+                    emit(node.operand);
+                    if (node.operator === 41) {
+                        write(" += 1");
+                    }
+                    else {
+                        write(" -= 1");
+                    }
+                }
+                else {
+                    emit(node.operand);
+                    write(ts.tokenToString(node.operator));
+                }
+            }
+            function shouldHoistDeclarationInSystemJsModule(node) {
+                return isSourceFileLevelDeclarationInSystemJsModule(node, false);
+            }
+            function isSourceFileLevelDeclarationInSystemJsModule(node, isExported) {
+                if (!node || !isCurrentFileSystemExternalModule()) {
+                    return false;
+                }
+                var current = ts.getRootDeclaration(node).parent;
+                while (current) {
+                    if (current.kind === 256) {
+                        return !isExported || ((ts.getCombinedNodeFlags(node) & 1) !== 0);
+                    }
+                    else if (ts.isDeclaration(current)) {
+                        return false;
+                    }
+                    else {
+                        current = current.parent;
+                    }
+                }
+            }
+            function emitExponentiationOperator(node) {
+                var leftHandSideExpression = node.left;
+                if (node.operatorToken.kind === 60) {
+                    var synthesizedLHS = void 0;
+                    var shouldEmitParentheses = false;
+                    if (ts.isElementAccessExpression(leftHandSideExpression)) {
+                        shouldEmitParentheses = true;
+                        write("(");
+                        synthesizedLHS = ts.createSynthesizedNode(173, false);
+                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, false, false);
+                        synthesizedLHS.expression = identifier;
+                        if (leftHandSideExpression.argumentExpression.kind !== 8 &&
+                            leftHandSideExpression.argumentExpression.kind !== 9) {
+                            var tempArgumentExpression = createAndRecordTempVariable(268435456);
+                            synthesizedLHS.argumentExpression = tempArgumentExpression;
+                            emitAssignment(tempArgumentExpression, leftHandSideExpression.argumentExpression, true, leftHandSideExpression.expression);
+                        }
+                        else {
+                            synthesizedLHS.argumentExpression = leftHandSideExpression.argumentExpression;
+                        }
+                        write(", ");
+                    }
+                    else if (ts.isPropertyAccessExpression(leftHandSideExpression)) {
+                        shouldEmitParentheses = true;
+                        write("(");
+                        synthesizedLHS = ts.createSynthesizedNode(172, false);
+                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, false, false);
+                        synthesizedLHS.expression = identifier;
+                        synthesizedLHS.dotToken = leftHandSideExpression.dotToken;
+                        synthesizedLHS.name = leftHandSideExpression.name;
+                        write(", ");
+                    }
+                    emit(synthesizedLHS || leftHandSideExpression);
+                    write(" = ");
+                    write("Math.pow(");
+                    emit(synthesizedLHS || leftHandSideExpression);
+                    write(", ");
+                    emit(node.right);
+                    write(")");
+                    if (shouldEmitParentheses) {
+                        write(")");
+                    }
+                }
+                else {
+                    write("Math.pow(");
+                    emit(leftHandSideExpression);
+                    write(", ");
+                    emit(node.right);
+                    write(")");
+                }
+            }
+            function emitAliasEqual(name) {
+                for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
+                    var specifier = _b[_a];
+                    emitStart(specifier.name);
+                    emitContainingModuleName(specifier);
+                    if (languageVersion === 0 && name.text === "default") {
+                        write('["default"]');
+                    }
+                    else {
+                        write(".");
+                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                    }
+                    emitEnd(specifier.name);
+                    write(" = ");
+                }
+                return true;
+            }
+            function emitBinaryExpression(node) {
+                if (languageVersion < 2 && node.operatorToken.kind === 56 &&
+                    (node.left.kind === 171 || node.left.kind === 170)) {
+                    emitDestructuring(node, node.parent.kind === 202);
+                }
+                else {
+                    var isAssignment = ts.isAssignmentOperator(node.operatorToken.kind);
+                    var externalExportChanged = isAssignment &&
+                        isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left);
+                    if (externalExportChanged) {
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithoutSourceMap(node.left);
+                        write("\", ");
+                    }
+                    var internalExportChanged = isAssignment &&
+                        isNameOfExportedDeclarationInNonES6Module(node.left);
+                    if (internalExportChanged) {
+                        emitAliasEqual(node.left);
+                    }
+                    if (node.operatorToken.kind === 38 || node.operatorToken.kind === 60) {
+                        emitExponentiationOperator(node);
+                    }
+                    else {
+                        emit(node.left);
+                        var indentedBeforeOperator = indentIfOnDifferentLines(node, node.left, node.operatorToken, node.operatorToken.kind !== 24 ? " " : undefined);
+                        write(ts.tokenToString(node.operatorToken.kind));
+                        var indentedAfterOperator = indentIfOnDifferentLines(node, node.operatorToken, node.right, " ");
+                        emit(node.right);
+                        decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator);
+                    }
+                    if (externalExportChanged) {
+                        write(")");
+                    }
+                }
+            }
+            function synthesizedNodeStartsOnNewLine(node) {
+                return ts.nodeIsSynthesized(node) && node.startsOnNewLine;
+            }
+            function emitConditionalExpression(node) {
+                emit(node.condition);
+                var indentedBeforeQuestion = indentIfOnDifferentLines(node, node.condition, node.questionToken, " ");
+                write("?");
+                var indentedAfterQuestion = indentIfOnDifferentLines(node, node.questionToken, node.whenTrue, " ");
+                emit(node.whenTrue);
+                decreaseIndentIf(indentedBeforeQuestion, indentedAfterQuestion);
+                var indentedBeforeColon = indentIfOnDifferentLines(node, node.whenTrue, node.colonToken, " ");
+                write(":");
+                var indentedAfterColon = indentIfOnDifferentLines(node, node.colonToken, node.whenFalse, " ");
+                emit(node.whenFalse);
+                decreaseIndentIf(indentedBeforeColon, indentedAfterColon);
+            }
+            function decreaseIndentIf(value1, value2) {
+                if (value1) {
+                    decreaseIndent();
+                }
+                if (value2) {
+                    decreaseIndent();
+                }
+            }
+            function isSingleLineEmptyBlock(node) {
+                if (node && node.kind === 199) {
+                    var block = node;
+                    return block.statements.length === 0 && nodeEndIsOnSameLineAsNodeStart(block, block);
+                }
+            }
+            function emitBlock(node) {
+                if (isSingleLineEmptyBlock(node)) {
+                    emitToken(15, node.pos);
+                    write(" ");
+                    emitToken(16, node.statements.end);
+                    return;
+                }
+                emitToken(15, node.pos);
+                increaseIndent();
+                if (node.kind === 226) {
+                    ts.Debug.assert(node.parent.kind === 225);
+                    emitCaptureThisForNodeIfNecessary(node.parent);
+                }
+                emitLines(node.statements);
+                if (node.kind === 226) {
+                    emitTempDeclarations(true);
+                }
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.statements.end);
+            }
+            function emitEmbeddedStatement(node) {
+                if (node.kind === 199) {
+                    write(" ");
+                    emit(node);
+                }
+                else {
+                    increaseIndent();
+                    writeLine();
+                    emit(node);
+                    decreaseIndent();
+                }
+            }
+            function emitExpressionStatement(node) {
+                emitParenthesizedIf(node.expression, node.expression.kind === 180);
+                write(";");
+            }
+            function emitIfStatement(node) {
+                var endPos = emitToken(88, node.pos);
+                write(" ");
+                endPos = emitToken(17, endPos);
+                emit(node.expression);
+                emitToken(18, node.expression.end);
+                emitEmbeddedStatement(node.thenStatement);
+                if (node.elseStatement) {
+                    writeLine();
+                    emitToken(80, node.thenStatement.end);
+                    if (node.elseStatement.kind === 203) {
+                        write(" ");
+                        emit(node.elseStatement);
+                    }
+                    else {
+                        emitEmbeddedStatement(node.elseStatement);
+                    }
+                }
+            }
+            function emitDoStatement(node) {
+                emitLoop(node, emitDoStatementWorker);
+            }
+            function emitDoStatementWorker(node, loop) {
+                write("do");
+                if (loop) {
+                    emitConvertedLoopCall(loop, true);
+                }
+                else {
+                    emitNormalLoopBody(node, true);
+                }
+                if (node.statement.kind === 199) {
+                    write(" ");
+                }
+                else {
+                    writeLine();
+                }
+                write("while (");
+                emit(node.expression);
+                write(");");
+            }
+            function emitWhileStatement(node) {
+                emitLoop(node, emitWhileStatementWorker);
+            }
+            function emitWhileStatementWorker(node, loop) {
+                write("while (");
+                emit(node.expression);
+                write(")");
+                if (loop) {
+                    emitConvertedLoopCall(loop, true);
+                }
+                else {
+                    emitNormalLoopBody(node, true);
+                }
+            }
+            function tryEmitStartOfVariableDeclarationList(decl) {
+                if (shouldHoistVariable(decl, true)) {
+                    return false;
+                }
+                if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072) === 0) {
+                    for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) {
+                        var varDecl = _b[_a];
+                        hoistVariableDeclarationFromLoop(convertedLoopState, varDecl);
+                    }
+                    return false;
+                }
+                emitStart(decl);
+                if (decl && languageVersion >= 2) {
+                    if (ts.isLet(decl)) {
+                        write("let ");
+                    }
+                    else if (ts.isConst(decl)) {
+                        write("const ");
+                    }
+                    else {
+                        write("var ");
+                    }
+                }
+                else {
+                    write("var ");
+                }
+                return true;
+            }
+            function emitVariableDeclarationListSkippingUninitializedEntries(list) {
+                var started = false;
+                for (var _a = 0, _b = list.declarations; _a < _b.length; _a++) {
+                    var decl = _b[_a];
+                    if (!decl.initializer) {
+                        continue;
+                    }
+                    if (!started) {
+                        started = true;
+                    }
+                    else {
+                        write(", ");
+                    }
+                    emit(decl);
+                }
+                return started;
+            }
+            function shouldConvertLoopBody(node) {
+                return languageVersion < 2 &&
+                    (resolver.getNodeCheckFlags(node) & 65536) !== 0;
+            }
+            function emitLoop(node, loopEmitter) {
+                var shouldConvert = shouldConvertLoopBody(node);
+                if (!shouldConvert) {
+                    loopEmitter(node, undefined);
+                }
+                else {
+                    var loop = convertLoopBody(node);
+                    if (node.parent.kind === 214) {
+                        emitLabelAndColon(node.parent);
+                    }
+                    loopEmitter(node, loop);
+                }
+            }
+            function convertLoopBody(node) {
+                var functionName = makeUniqueName("_loop");
+                var loopInitializer;
+                switch (node.kind) {
+                    case 206:
+                    case 207:
+                    case 208:
+                        var initializer = node.initializer;
+                        if (initializer && initializer.kind === 219) {
+                            loopInitializer = node.initializer;
+                        }
+                        break;
+                }
+                var loopParameters;
+                var loopOutParameters;
+                if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3072)) {
+                    loopParameters = [];
+                    for (var _a = 0, _b = loopInitializer.declarations; _a < _b.length; _a++) {
+                        var varDeclaration = _b[_a];
+                        processVariableDeclaration(varDeclaration.name);
+                    }
+                }
+                var bodyIsBlock = node.statement.kind === 199;
+                var paramList = loopParameters ? loopParameters.join(", ") : "";
+                writeLine();
+                write("var " + functionName + " = function(" + paramList + ")");
+                var convertedOuterLoopState = convertedLoopState;
+                convertedLoopState = { loopOutParameters: loopOutParameters };
+                if (convertedOuterLoopState) {
+                    if (convertedOuterLoopState.argumentsName) {
+                        convertedLoopState.argumentsName = convertedOuterLoopState.argumentsName;
+                    }
+                    if (convertedOuterLoopState.thisName) {
+                        convertedLoopState.thisName = convertedOuterLoopState.thisName;
+                    }
+                    if (convertedOuterLoopState.hoistedLocalVariables) {
+                        convertedLoopState.hoistedLocalVariables = convertedOuterLoopState.hoistedLocalVariables;
+                    }
+                }
+                write(" {");
+                writeLine();
+                increaseIndent();
+                if (bodyIsBlock) {
+                    emitLines(node.statement.statements);
+                }
+                else {
+                    emit(node.statement);
+                }
+                writeLine();
+                copyLoopOutParameters(convertedLoopState, 1, true);
+                decreaseIndent();
+                writeLine();
+                write("};");
+                writeLine();
+                if (loopOutParameters) {
+                    write("var ");
+                    for (var i = 0; i < loopOutParameters.length; i++) {
+                        if (i !== 0) {
+                            write(", ");
+                        }
+                        write(loopOutParameters[i].outParamName);
+                    }
+                    write(";");
+                    writeLine();
+                }
+                if (convertedLoopState.argumentsName) {
+                    if (convertedOuterLoopState) {
+                        convertedOuterLoopState.argumentsName = convertedLoopState.argumentsName;
+                    }
+                    else {
+                        write("var " + convertedLoopState.argumentsName + " = arguments;");
+                        writeLine();
+                    }
+                }
+                if (convertedLoopState.thisName) {
+                    if (convertedOuterLoopState) {
+                        convertedOuterLoopState.thisName = convertedLoopState.thisName;
+                    }
+                    else {
+                        write("var " + convertedLoopState.thisName + " = this;");
+                        writeLine();
+                    }
+                }
+                if (convertedLoopState.hoistedLocalVariables) {
+                    if (convertedOuterLoopState) {
+                        convertedOuterLoopState.hoistedLocalVariables = convertedLoopState.hoistedLocalVariables;
+                    }
+                    else {
+                        write("var ");
+                        var seen = void 0;
+                        for (var _c = 0, _d = convertedLoopState.hoistedLocalVariables; _c < _d.length; _c++) {
+                            var id = _d[_c];
+                            if (!seen) {
+                                seen = {};
+                            }
+                            else {
+                                write(", ");
+                            }
+                            if (!ts.hasProperty(seen, id.text)) {
+                                emit(id);
+                                seen[id.text] = id.text;
+                            }
+                        }
+                        write(";");
+                        writeLine();
+                    }
+                }
+                var currentLoopState = convertedLoopState;
+                convertedLoopState = convertedOuterLoopState;
+                return { functionName: functionName, paramList: paramList, state: currentLoopState };
+                function processVariableDeclaration(name) {
+                    if (name.kind === 69) {
+                        var nameText = isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(name)
+                            ? getGeneratedNameForNode(name)
+                            : name.text;
+                        loopParameters.push(nameText);
+                        if (resolver.getNodeCheckFlags(name.parent) & 2097152) {
+                            var reassignedVariable = { originalName: name, outParamName: makeUniqueName("out_" + nameText) };
+                            (loopOutParameters || (loopOutParameters = [])).push(reassignedVariable);
+                        }
+                    }
+                    else {
+                        for (var _a = 0, _b = name.elements; _a < _b.length; _a++) {
+                            var element = _b[_a];
+                            processVariableDeclaration(element.name);
+                        }
+                    }
+                }
+            }
+            function emitNormalLoopBody(node, emitAsEmbeddedStatement) {
+                var saveAllowedNonLabeledJumps;
+                if (convertedLoopState) {
+                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                    convertedLoopState.allowedNonLabeledJumps = 2 | 4;
+                }
+                if (emitAsEmbeddedStatement) {
+                    emitEmbeddedStatement(node.statement);
+                }
+                else if (node.statement.kind === 199) {
+                    emitLines(node.statement.statements);
+                }
+                else {
+                    writeLine();
+                    emit(node.statement);
+                }
+                if (convertedLoopState) {
+                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
+                }
+            }
+            function copyLoopOutParameters(state, copyDirection, emitAsStatements) {
+                if (state.loopOutParameters) {
+                    for (var _a = 0, _b = state.loopOutParameters; _a < _b.length; _a++) {
+                        var outParam = _b[_a];
+                        if (copyDirection === 0) {
+                            emitIdentifier(outParam.originalName);
+                            write(" = " + outParam.outParamName);
+                        }
+                        else {
+                            write(outParam.outParamName + " = ");
+                            emitIdentifier(outParam.originalName);
+                        }
+                        if (emitAsStatements) {
+                            write(";");
+                            writeLine();
+                        }
+                        else {
+                            write(", ");
+                        }
+                    }
+                }
+            }
+            function emitConvertedLoopCall(loop, emitAsBlock) {
+                if (emitAsBlock) {
+                    write(" {");
+                    writeLine();
+                    increaseIndent();
+                }
+                var isSimpleLoop = !(loop.state.nonLocalJumps & ~4) &&
+                    !loop.state.labeledNonLocalBreaks &&
+                    !loop.state.labeledNonLocalContinues;
+                var loopResult = makeUniqueName("state");
+                if (!isSimpleLoop) {
+                    write("var " + loopResult + " = ");
+                }
+                write(loop.functionName + "(" + loop.paramList + ");");
+                writeLine();
+                copyLoopOutParameters(loop.state, 0, true);
+                if (!isSimpleLoop) {
+                    writeLine();
+                    if (loop.state.nonLocalJumps & 8) {
+                        write("if (typeof " + loopResult + " === \"object\") ");
+                        if (convertedLoopState) {
+                            write("return " + loopResult + ";");
+                            convertedLoopState.nonLocalJumps |= 8;
+                        }
+                        else {
+                            write("return " + loopResult + ".value;");
+                        }
+                        writeLine();
+                    }
+                    if (loop.state.nonLocalJumps & 2) {
+                        write("if (" + loopResult + " === \"break\") break;");
+                        writeLine();
+                    }
+                    emitDispatchTableForLabeledJumps(loopResult, loop.state, convertedLoopState);
+                }
+                if (emitAsBlock) {
+                    writeLine();
+                    decreaseIndent();
+                    write("}");
+                }
+                function emitDispatchTableForLabeledJumps(loopResultVariable, currentLoop, outerLoop) {
+                    if (!currentLoop.labeledNonLocalBreaks && !currentLoop.labeledNonLocalContinues) {
+                        return;
+                    }
+                    write("switch(" + loopResultVariable + ") {");
+                    increaseIndent();
+                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalBreaks, true, loopResultVariable, outerLoop);
+                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalContinues, false, loopResultVariable, outerLoop);
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+                function emitDispatchEntriesForLabeledJumps(table, isBreak, loopResultVariable, outerLoop) {
+                    if (!table) {
+                        return;
+                    }
+                    for (var labelText in table) {
+                        var labelMarker = table[labelText];
+                        writeLine();
+                        write("case \"" + labelMarker + "\": ");
+                        if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) {
+                            if (isBreak) {
+                                write("break ");
+                            }
+                            else {
+                                write("continue ");
+                            }
+                            write(labelText + ";");
+                        }
+                        else {
+                            setLabeledJump(outerLoop, isBreak, labelText, labelMarker);
+                            write("return " + loopResultVariable + ";");
+                        }
+                    }
+                }
+            }
+            function emitForStatement(node) {
+                emitLoop(node, emitForStatementWorker);
+            }
+            function emitForStatementWorker(node, loop) {
+                var endPos = emitToken(86, node.pos);
+                write(" ");
+                endPos = emitToken(17, endPos);
+                if (node.initializer && node.initializer.kind === 219) {
+                    var variableDeclarationList = node.initializer;
+                    var startIsEmitted = tryEmitStartOfVariableDeclarationList(variableDeclarationList);
+                    if (startIsEmitted) {
+                        emitCommaList(variableDeclarationList.declarations);
+                    }
+                    else {
+                        emitVariableDeclarationListSkippingUninitializedEntries(variableDeclarationList);
+                    }
+                }
+                else if (node.initializer) {
+                    emit(node.initializer);
+                }
+                write(";");
+                emitOptional(" ", node.condition);
+                write(";");
+                emitOptional(" ", node.incrementor);
+                write(")");
+                if (loop) {
+                    emitConvertedLoopCall(loop, true);
+                }
+                else {
+                    emitNormalLoopBody(node, true);
+                }
+            }
+            function emitForInOrForOfStatement(node) {
+                if (languageVersion < 2 && node.kind === 208) {
+                    emitLoop(node, emitDownLevelForOfStatementWorker);
+                }
+                else {
+                    emitLoop(node, emitForInOrForOfStatementWorker);
+                }
+            }
+            function emitForInOrForOfStatementWorker(node, loop) {
+                var endPos = emitToken(86, node.pos);
+                write(" ");
+                endPos = emitToken(17, endPos);
+                if (node.initializer.kind === 219) {
+                    var variableDeclarationList = node.initializer;
+                    if (variableDeclarationList.declarations.length >= 1) {
+                        tryEmitStartOfVariableDeclarationList(variableDeclarationList);
+                        emit(variableDeclarationList.declarations[0]);
+                    }
+                }
+                else {
+                    emit(node.initializer);
+                }
+                if (node.kind === 207) {
+                    write(" in ");
+                }
+                else {
+                    write(" of ");
+                }
+                emit(node.expression);
+                emitToken(18, node.expression.end);
+                if (loop) {
+                    emitConvertedLoopCall(loop, true);
+                }
+                else {
+                    emitNormalLoopBody(node, true);
+                }
+            }
+            function emitDownLevelForOfStatementWorker(node, loop) {
+                var endPos = emitToken(86, node.pos);
+                write(" ");
+                endPos = emitToken(17, endPos);
+                var counter = createTempVariable(268435456);
+                var rhsReference = ts.createSynthesizedNode(69);
+                rhsReference.text = node.expression.kind === 69 ?
+                    makeUniqueName(node.expression.text) :
+                    makeTempVariableName(0);
+                emitStart(node.expression);
+                write("var ");
+                emitNodeWithoutSourceMap(counter);
+                write(" = 0");
+                emitEnd(node.expression);
+                write(", ");
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(rhsReference);
+                write(" = ");
+                emitNodeWithoutSourceMap(node.expression);
+                emitEnd(node.expression);
+                write("; ");
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(counter);
+                write(" < ");
+                emitNodeWithCommentsAndWithoutSourcemap(rhsReference);
+                write(".length");
+                emitEnd(node.expression);
+                write("; ");
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(counter);
+                write("++");
+                emitEnd(node.expression);
+                emitToken(18, node.expression.end);
+                write(" {");
+                writeLine();
+                increaseIndent();
+                var rhsIterationValue = createElementAccessExpression(rhsReference, counter);
+                emitStart(node.initializer);
+                if (node.initializer.kind === 219) {
+                    write("var ");
+                    var variableDeclarationList = node.initializer;
+                    if (variableDeclarationList.declarations.length > 0) {
+                        var declaration = variableDeclarationList.declarations[0];
+                        if (ts.isBindingPattern(declaration.name)) {
+                            emitDestructuring(declaration, false, rhsIterationValue);
+                        }
+                        else {
+                            emitNodeWithCommentsAndWithoutSourcemap(declaration);
+                            write(" = ");
+                            emitNodeWithoutSourceMap(rhsIterationValue);
+                        }
+                    }
+                    else {
+                        emitNodeWithoutSourceMap(createTempVariable(0));
+                        write(" = ");
+                        emitNodeWithoutSourceMap(rhsIterationValue);
+                    }
+                }
+                else {
+                    var assignmentExpression = createBinaryExpression(node.initializer, 56, rhsIterationValue, false);
+                    if (node.initializer.kind === 170 || node.initializer.kind === 171) {
+                        emitDestructuring(assignmentExpression, true, undefined);
+                    }
+                    else {
+                        emitNodeWithCommentsAndWithoutSourcemap(assignmentExpression);
+                    }
+                }
+                emitEnd(node.initializer);
+                write(";");
+                if (loop) {
+                    writeLine();
+                    emitConvertedLoopCall(loop, false);
+                }
+                else {
+                    emitNormalLoopBody(node, false);
+                }
+                writeLine();
+                decreaseIndent();
+                write("}");
+            }
+            function emitBreakOrContinueStatement(node) {
+                if (convertedLoopState) {
+                    var jump = node.kind === 210 ? 2 : 4;
+                    var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) ||
+                        (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
+                    if (!canUseBreakOrContinue) {
+                        write("return ");
+                        copyLoopOutParameters(convertedLoopState, 1, false);
+                        if (!node.label) {
+                            if (node.kind === 210) {
+                                convertedLoopState.nonLocalJumps |= 2;
+                                write("\"break\";");
+                            }
+                            else {
+                                convertedLoopState.nonLocalJumps |= 4;
+                                write("\"continue\";");
+                            }
+                        }
+                        else {
+                            var labelMarker = void 0;
+                            if (node.kind === 210) {
+                                labelMarker = "break-" + node.label.text;
+                                setLabeledJump(convertedLoopState, true, node.label.text, labelMarker);
+                            }
+                            else {
+                                labelMarker = "continue-" + node.label.text;
+                                setLabeledJump(convertedLoopState, false, node.label.text, labelMarker);
+                            }
+                            write("\"" + labelMarker + "\";");
+                        }
+                        return;
+                    }
+                }
+                emitToken(node.kind === 210 ? 70 : 75, node.pos);
+                emitOptional(" ", node.label);
+                write(";");
+            }
+            function emitReturnStatement(node) {
+                if (convertedLoopState) {
+                    convertedLoopState.nonLocalJumps |= 8;
+                    write("return { value: ");
+                    if (node.expression) {
+                        emit(node.expression);
+                    }
+                    else {
+                        write("void 0");
+                    }
+                    write(" };");
+                    return;
+                }
+                emitToken(94, node.pos);
+                emitOptional(" ", node.expression);
+                write(";");
+            }
+            function emitWithStatement(node) {
+                write("with (");
+                emit(node.expression);
+                write(")");
+                emitEmbeddedStatement(node.statement);
+            }
+            function emitSwitchStatement(node) {
+                var endPos = emitToken(96, node.pos);
+                write(" ");
+                emitToken(17, endPos);
+                emit(node.expression);
+                endPos = emitToken(18, node.expression.end);
+                write(" ");
+                var saveAllowedNonLabeledJumps;
+                if (convertedLoopState) {
+                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                    convertedLoopState.allowedNonLabeledJumps |= 2;
+                }
+                emitCaseBlock(node.caseBlock, endPos);
+                if (convertedLoopState) {
+                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
+                }
+            }
+            function emitCaseBlock(node, startPos) {
+                emitToken(15, startPos);
+                increaseIndent();
+                emitLines(node.clauses);
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.clauses.end);
+            }
+            function nodeStartPositionsAreOnSameLine(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node1.pos)) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
+            }
+            function nodeEndPositionsAreOnSameLine(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, node2.end);
+            }
+            function nodeEndIsOnSameLineAsNodeStart(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
+            }
+            function emitCaseOrDefaultClause(node) {
+                if (node.kind === 249) {
+                    write("case ");
+                    emit(node.expression);
+                    write(":");
+                }
+                else {
+                    write("default:");
+                }
+                if (node.statements.length === 1 && nodeStartPositionsAreOnSameLine(node, node.statements[0])) {
+                    write(" ");
+                    emit(node.statements[0]);
+                }
+                else {
+                    increaseIndent();
+                    emitLines(node.statements);
+                    decreaseIndent();
+                }
+            }
+            function emitThrowStatement(node) {
+                write("throw ");
+                emit(node.expression);
+                write(";");
+            }
+            function emitTryStatement(node) {
+                write("try ");
+                emit(node.tryBlock);
+                emit(node.catchClause);
+                if (node.finallyBlock) {
+                    writeLine();
+                    write("finally ");
+                    emit(node.finallyBlock);
+                }
+            }
+            function emitCatchClause(node) {
+                writeLine();
+                var endPos = emitToken(72, node.pos);
+                write(" ");
+                emitToken(17, endPos);
+                emit(node.variableDeclaration);
+                emitToken(18, node.variableDeclaration ? node.variableDeclaration.end : endPos);
+                write(" ");
+                emitBlock(node.block);
+            }
+            function emitDebuggerStatement(node) {
+                emitToken(76, node.pos);
+                write(";");
+            }
+            function emitLabelAndColon(node) {
+                emit(node.label);
+                write(": ");
+            }
+            function emitLabeledStatement(node) {
+                if (!ts.isIterationStatement(node.statement, false) || !shouldConvertLoopBody(node.statement)) {
+                    emitLabelAndColon(node);
+                }
+                if (convertedLoopState) {
+                    if (!convertedLoopState.labels) {
+                        convertedLoopState.labels = {};
+                    }
+                    convertedLoopState.labels[node.label.text] = node.label.text;
+                }
+                emit(node.statement);
+                if (convertedLoopState) {
+                    convertedLoopState.labels[node.label.text] = undefined;
+                }
+            }
+            function getContainingModule(node) {
+                do {
+                    node = node.parent;
+                } while (node && node.kind !== 225);
+                return node;
+            }
+            function emitContainingModuleName(node) {
+                var container = getContainingModule(node);
+                write(container ? getGeneratedNameForNode(container) : "exports");
+            }
+            function emitModuleMemberName(node) {
+                emitStart(node.name);
+                if (ts.getCombinedNodeFlags(node) & 1) {
+                    var container = getContainingModule(node);
+                    if (container) {
+                        write(getGeneratedNameForNode(container));
+                        write(".");
+                    }
+                    else if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
+                        write("exports.");
+                    }
+                }
+                emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                emitEnd(node.name);
+            }
+            function createVoidZero() {
+                var zero = ts.createSynthesizedNode(8);
+                zero.text = "0";
+                var result = ts.createSynthesizedNode(183);
+                result.expression = zero;
+                return result;
+            }
+            function emitEs6ExportDefaultCompat(node) {
+                if (node.parent.kind === 256) {
+                    ts.Debug.assert(!!(node.flags & 512) || node.kind === 235);
+                    if (modulekind === ts.ModuleKind.CommonJS || modulekind === ts.ModuleKind.AMD || modulekind === ts.ModuleKind.UMD) {
+                        if (!isEs6Module) {
+                            if (languageVersion !== 0) {
+                                write('Object.defineProperty(exports, "__esModule", { value: true });');
+                                writeLine();
+                            }
+                            else {
+                                write("exports.__esModule = true;");
+                                writeLine();
+                            }
+                        }
+                    }
+                }
+            }
+            function emitExportMemberAssignment(node) {
+                if (node.flags & 1) {
+                    writeLine();
+                    emitStart(node);
+                    if (modulekind === ts.ModuleKind.System && node.parent === currentSourceFile) {
+                        write(exportFunctionForFile + "(\"");
+                        if (node.flags & 512) {
+                            write("default");
+                        }
+                        else {
+                            emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                        }
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(")");
+                    }
+                    else {
+                        if (node.flags & 512) {
+                            emitEs6ExportDefaultCompat(node);
+                            if (languageVersion === 0) {
+                                write('exports["default"]');
+                            }
+                            else {
+                                write("exports.default");
+                            }
+                        }
+                        else {
+                            emitModuleMemberName(node);
+                        }
+                        write(" = ");
+                        emitDeclarationName(node);
+                    }
+                    emitEnd(node);
+                    write(";");
+                }
+            }
+            function emitExportMemberAssignments(name) {
+                if (modulekind === ts.ModuleKind.System) {
+                    return;
+                }
+                if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
+                    for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
+                        var specifier = _b[_a];
+                        writeLine();
+                        emitStart(specifier.name);
+                        emitContainingModuleName(specifier);
+                        write(".");
+                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                        emitEnd(specifier.name);
+                        write(" = ");
+                        emitExpressionIdentifier(name);
+                        write(";");
+                    }
+                }
+            }
+            function emitExportSpecifierInSystemModule(specifier) {
+                ts.Debug.assert(modulekind === ts.ModuleKind.System);
+                if (!resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name) && !resolver.isValueAliasDeclaration(specifier)) {
+                    return;
+                }
+                writeLine();
+                emitStart(specifier.name);
+                write(exportFunctionForFile + "(\"");
+                emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                write("\", ");
+                emitExpressionIdentifier(specifier.propertyName || specifier.name);
+                write(")");
+                emitEnd(specifier.name);
+                write(";");
+            }
+            function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) {
+                if (shouldEmitCommaBeforeAssignment) {
+                    write(", ");
+                }
+                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name);
+                if (exportChanged) {
+                    write(exportFunctionForFile + "(\"");
+                    emitNodeWithCommentsAndWithoutSourcemap(name);
+                    write("\", ");
+                }
+                var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 || name.parent.kind === 169);
+                emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap);
+                withTemporaryNoSourceMap(function () {
+                    if (isVariableDeclarationOrBindingElement) {
+                        emitModuleMemberName(name.parent);
+                    }
+                    else {
+                        emit(name);
+                    }
+                    write(" = ");
+                    emit(value);
+                });
+                emitEnd(nodeForSourceMap, true);
+                if (exportChanged) {
+                    write(")");
+                }
+            }
+            function emitTempVariableAssignment(expression, canDefineTempVariablesInPlace, shouldEmitCommaBeforeAssignment, sourceMapNode) {
+                var identifier = createTempVariable(0);
+                if (!canDefineTempVariablesInPlace) {
+                    recordTempDeclaration(identifier);
+                }
+                emitAssignment(identifier, expression, shouldEmitCommaBeforeAssignment, sourceMapNode || expression.parent);
+                return identifier;
+            }
+            function isFirstVariableDeclaration(root) {
+                return root.kind === 218 &&
+                    root.parent.kind === 219 &&
+                    root.parent.declarations[0] === root;
+            }
+            function emitDestructuring(root, isAssignmentExpressionStatement, value) {
+                var emitCount = 0;
+                var canDefineTempVariablesInPlace = false;
+                if (root.kind === 218) {
+                    var isExported = ts.getCombinedNodeFlags(root) & 1;
+                    var isSourceLevelForSystemModuleKind = shouldHoistDeclarationInSystemJsModule(root);
+                    canDefineTempVariablesInPlace = !isExported && !isSourceLevelForSystemModuleKind;
+                }
+                else if (root.kind === 142) {
+                    canDefineTempVariablesInPlace = true;
+                }
+                if (root.kind === 187) {
+                    emitAssignmentExpression(root);
+                }
+                else {
+                    ts.Debug.assert(!isAssignmentExpressionStatement);
+                    if (isFirstVariableDeclaration(root)) {
+                        sourceMap.changeEmitSourcePos();
+                    }
+                    emitBindingElement(root, value);
+                }
+                function ensureIdentifier(expr, reuseIdentifierExpressions, sourceMapNode) {
+                    if (expr.kind === 69 && reuseIdentifierExpressions) {
+                        return expr;
+                    }
+                    var identifier = emitTempVariableAssignment(expr, canDefineTempVariablesInPlace, emitCount > 0, sourceMapNode);
+                    emitCount++;
+                    return identifier;
+                }
+                function createDefaultValueCheck(value, defaultValue, sourceMapNode) {
+                    value = ensureIdentifier(value, true, sourceMapNode);
+                    var equals = ts.createSynthesizedNode(187);
+                    equals.left = value;
+                    equals.operatorToken = ts.createSynthesizedNode(32);
+                    equals.right = createVoidZero();
+                    return createConditionalExpression(equals, defaultValue, value);
+                }
+                function createConditionalExpression(condition, whenTrue, whenFalse) {
+                    var cond = ts.createSynthesizedNode(188);
+                    cond.condition = condition;
+                    cond.questionToken = ts.createSynthesizedNode(53);
+                    cond.whenTrue = whenTrue;
+                    cond.colonToken = ts.createSynthesizedNode(54);
+                    cond.whenFalse = whenFalse;
+                    return cond;
+                }
+                function createNumericLiteral(value) {
+                    var node = ts.createSynthesizedNode(8);
+                    node.text = "" + value;
+                    return node;
+                }
+                function createPropertyAccessForDestructuringProperty(object, propName) {
+                    var index;
+                    var nameIsComputed = propName.kind === 140;
+                    if (nameIsComputed) {
+                        index = ensureIdentifier(propName.expression, false, propName);
+                    }
+                    else {
+                        index = ts.createSynthesizedNode(propName.kind);
+                        index.text = ts.unescapeIdentifier(propName.text);
+                    }
+                    return !nameIsComputed && index.kind === 69
+                        ? createPropertyAccessExpression(object, index)
+                        : createElementAccessExpression(object, index);
+                }
+                function createSliceCall(value, sliceIndex) {
+                    var call = ts.createSynthesizedNode(174);
+                    var sliceIdentifier = ts.createSynthesizedNode(69);
+                    sliceIdentifier.text = "slice";
+                    call.expression = createPropertyAccessExpression(value, sliceIdentifier);
+                    call.arguments = ts.createSynthesizedNodeArray();
+                    call.arguments[0] = createNumericLiteral(sliceIndex);
+                    return call;
+                }
+                function emitObjectLiteralAssignment(target, value, sourceMapNode) {
+                    var properties = target.properties;
+                    if (properties.length !== 1) {
+                        value = ensureIdentifier(value, true, sourceMapNode);
+                    }
+                    for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) {
+                        var p = properties_5[_a];
+                        if (p.kind === 253 || p.kind === 254) {
+                            var propName = p.name;
+                            var target_1 = p.kind === 254 ? p : p.initializer || propName;
+                            emitDestructuringAssignment(target_1, createPropertyAccessForDestructuringProperty(value, propName), p);
+                        }
+                    }
+                }
+                function emitArrayLiteralAssignment(target, value, sourceMapNode) {
+                    var elements = target.elements;
+                    if (elements.length !== 1) {
+                        value = ensureIdentifier(value, true, sourceMapNode);
+                    }
+                    for (var i = 0; i < elements.length; i++) {
+                        var e = elements[i];
+                        if (e.kind !== 193) {
+                            if (e.kind !== 191) {
+                                emitDestructuringAssignment(e, createElementAccessExpression(value, createNumericLiteral(i)), e);
+                            }
+                            else if (i === elements.length - 1) {
+                                emitDestructuringAssignment(e.expression, createSliceCall(value, i), e);
+                            }
+                        }
+                    }
+                }
+                function emitDestructuringAssignment(target, value, sourceMapNode) {
+                    if (target.kind === 254) {
+                        if (target.objectAssignmentInitializer) {
+                            value = createDefaultValueCheck(value, target.objectAssignmentInitializer, sourceMapNode);
+                        }
+                        target = target.name;
+                    }
+                    else if (target.kind === 187 && target.operatorToken.kind === 56) {
+                        value = createDefaultValueCheck(value, target.right, sourceMapNode);
+                        target = target.left;
+                    }
+                    if (target.kind === 171) {
+                        emitObjectLiteralAssignment(target, value, sourceMapNode);
+                    }
+                    else if (target.kind === 170) {
+                        emitArrayLiteralAssignment(target, value, sourceMapNode);
+                    }
+                    else {
+                        emitAssignment(target, value, emitCount > 0, sourceMapNode);
+                        emitCount++;
+                    }
+                }
+                function emitAssignmentExpression(root) {
+                    var target = root.left;
+                    var value = root.right;
+                    if (ts.isEmptyObjectLiteralOrArrayLiteral(target)) {
+                        emit(value);
+                    }
+                    else if (isAssignmentExpressionStatement) {
+                        emitDestructuringAssignment(target, value, ts.nodeIsSynthesized(root) ? target : root);
+                    }
+                    else {
+                        if (root.parent.kind !== 178) {
+                            write("(");
+                        }
+                        value = ensureIdentifier(value, true, root);
+                        emitDestructuringAssignment(target, value, root);
+                        write(", ");
+                        emit(value);
+                        if (root.parent.kind !== 178) {
+                            write(")");
+                        }
+                    }
+                }
+                function emitBindingElement(target, value) {
+                    if (target.initializer) {
+                        value = value ? createDefaultValueCheck(value, target.initializer, target) : target.initializer;
+                    }
+                    else if (!value) {
+                        value = createVoidZero();
+                    }
+                    if (ts.isBindingPattern(target.name)) {
+                        var pattern = target.name;
+                        var elements = pattern.elements;
+                        var numElements = elements.length;
+                        if (numElements !== 1) {
+                            value = ensureIdentifier(value, numElements !== 0, target);
+                        }
+                        for (var i = 0; i < numElements; i++) {
+                            var element = elements[i];
+                            if (pattern.kind === 167) {
+                                var propName = element.propertyName || element.name;
+                                emitBindingElement(element, createPropertyAccessForDestructuringProperty(value, propName));
+                            }
+                            else if (element.kind !== 193) {
+                                if (!element.dotDotDotToken) {
+                                    emitBindingElement(element, createElementAccessExpression(value, createNumericLiteral(i)));
+                                }
+                                else if (i === numElements - 1) {
+                                    emitBindingElement(element, createSliceCall(value, i));
+                                }
+                            }
+                        }
+                    }
+                    else {
+                        emitAssignment(target.name, value, emitCount > 0, target);
+                        emitCount++;
+                    }
+                }
+            }
+            function emitVariableDeclaration(node) {
+                if (ts.isBindingPattern(node.name)) {
+                    var isExported = ts.getCombinedNodeFlags(node) & 1;
+                    if (languageVersion >= 2 && (!isExported || modulekind === ts.ModuleKind.ES6)) {
+                        var isTopLevelDeclarationInSystemModule = modulekind === ts.ModuleKind.System &&
+                            shouldHoistVariable(node, true);
+                        if (isTopLevelDeclarationInSystemModule) {
+                            write("(");
+                        }
+                        emit(node.name);
+                        emitOptional(" = ", node.initializer);
+                        if (isTopLevelDeclarationInSystemModule) {
+                            write(")");
+                        }
+                    }
+                    else {
+                        emitDestructuring(node, false);
+                    }
+                }
+                else {
+                    var initializer = node.initializer;
+                    if (!initializer &&
+                        languageVersion < 2 &&
+                        node.name.kind === 69) {
+                        var container = ts.getEnclosingBlockScopeContainer(node);
+                        var flags = resolver.getNodeCheckFlags(node);
+                        var isCapturedInFunction = flags & 131072;
+                        var isDeclaredInLoop = flags & 262144;
+                        var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(container) ||
+                            (isCapturedInFunction && isDeclaredInLoop && container.kind === 199 && ts.isIterationStatement(container.parent, false));
+                        var emittedAsNestedLetDeclaration = ts.getCombinedNodeFlags(node) & 1024 &&
+                            !emittedAsTopLevel;
+                        var emitExplicitInitializer = emittedAsNestedLetDeclaration &&
+                            container.kind !== 207 &&
+                            container.kind !== 208 &&
+                            (!resolver.isDeclarationWithCollidingName(node) ||
+                                (isDeclaredInLoop && !isCapturedInFunction && !ts.isIterationStatement(container, false)));
+                        if (emitExplicitInitializer) {
+                            initializer = createVoidZero();
+                        }
+                    }
+                    var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.name);
+                    if (exportChanged) {
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                        write("\", ");
+                    }
+                    emitModuleMemberName(node);
+                    emitOptional(" = ", initializer);
+                    if (exportChanged) {
+                        write(")");
+                    }
+                }
+            }
+            function emitExportVariableAssignments(node) {
+                if (node.kind === 193) {
+                    return;
+                }
+                var name = node.name;
+                if (name.kind === 69) {
+                    emitExportMemberAssignments(name);
+                }
+                else if (ts.isBindingPattern(name)) {
+                    ts.forEach(name.elements, emitExportVariableAssignments);
+                }
+            }
+            function isES6ExportedDeclaration(node) {
+                return !!(node.flags & 1) &&
+                    modulekind === ts.ModuleKind.ES6 &&
+                    node.parent.kind === 256;
+            }
+            function emitVariableStatement(node) {
+                var startIsEmitted = false;
+                if (node.flags & 1) {
+                    if (isES6ExportedDeclaration(node)) {
+                        write("export ");
+                        startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
+                    }
+                }
+                else {
+                    startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
+                }
+                if (startIsEmitted) {
+                    emitCommaList(node.declarationList.declarations);
+                    write(";");
+                }
+                else {
+                    var atLeastOneItem = emitVariableDeclarationListSkippingUninitializedEntries(node.declarationList);
+                    if (atLeastOneItem) {
+                        write(";");
+                    }
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
+                    ts.forEach(node.declarationList.declarations, emitExportVariableAssignments);
+                }
+            }
+            function shouldEmitLeadingAndTrailingCommentsForVariableStatement(node) {
+                if (!(node.flags & 1)) {
+                    return true;
+                }
+                if (isES6ExportedDeclaration(node)) {
+                    return true;
+                }
+                for (var _a = 0, _b = node.declarationList.declarations; _a < _b.length; _a++) {
+                    var declaration = _b[_a];
+                    if (declaration.initializer) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function emitParameter(node) {
+                if (languageVersion < 2) {
+                    if (ts.isBindingPattern(node.name)) {
+                        var name_29 = createTempVariable(0);
+                        if (!tempParameters) {
+                            tempParameters = [];
+                        }
+                        tempParameters.push(name_29);
+                        emit(name_29);
+                    }
+                    else {
+                        emit(node.name);
+                    }
+                }
+                else {
+                    if (node.dotDotDotToken) {
+                        write("...");
+                    }
+                    emit(node.name);
+                    emitOptional(" = ", node.initializer);
+                }
+            }
+            function emitDefaultValueAssignments(node) {
+                if (languageVersion < 2) {
+                    var tempIndex_1 = 0;
+                    ts.forEach(node.parameters, function (parameter) {
+                        if (parameter.dotDotDotToken) {
+                            return;
+                        }
+                        var paramName = parameter.name, initializer = parameter.initializer;
+                        if (ts.isBindingPattern(paramName)) {
+                            var hasBindingElements = paramName.elements.length > 0;
+                            if (hasBindingElements || initializer) {
+                                writeLine();
+                                write("var ");
+                                if (hasBindingElements) {
+                                    emitDestructuring(parameter, false, tempParameters[tempIndex_1]);
+                                }
+                                else {
+                                    emit(tempParameters[tempIndex_1]);
+                                    write(" = ");
+                                    emit(initializer);
+                                }
+                                write(";");
+                                tempIndex_1++;
+                            }
+                        }
+                        else if (initializer) {
+                            writeLine();
+                            emitStart(parameter);
+                            write("if (");
+                            emitNodeWithoutSourceMap(paramName);
+                            write(" === void 0)");
+                            emitEnd(parameter);
+                            write(" { ");
+                            emitStart(parameter);
+                            emitNodeWithCommentsAndWithoutSourcemap(paramName);
+                            write(" = ");
+                            emitNodeWithCommentsAndWithoutSourcemap(initializer);
+                            emitEnd(parameter);
+                            write("; }");
+                        }
+                    });
+                }
+            }
+            function emitRestParameter(node) {
+                if (languageVersion < 2 && ts.hasDeclaredRestParameter(node)) {
+                    var restIndex = node.parameters.length - 1;
+                    var restParam = node.parameters[restIndex];
+                    if (ts.isBindingPattern(restParam.name)) {
+                        return;
+                    }
+                    var tempName = createTempVariable(268435456).text;
+                    writeLine();
+                    emitLeadingComments(restParam);
+                    emitStart(restParam);
+                    write("var ");
+                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
+                    write(" = [];");
+                    emitEnd(restParam);
+                    emitTrailingComments(restParam);
+                    writeLine();
+                    write("for (");
+                    emitStart(restParam);
+                    write("var " + tempName + " = " + restIndex + ";");
+                    emitEnd(restParam);
+                    write(" ");
+                    emitStart(restParam);
+                    write(tempName + " < arguments.length;");
+                    emitEnd(restParam);
+                    write(" ");
+                    emitStart(restParam);
+                    write(tempName + "++");
+                    emitEnd(restParam);
+                    write(") {");
+                    increaseIndent();
+                    writeLine();
+                    emitStart(restParam);
+                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
+                    write("[" + tempName + " - " + restIndex + "] = arguments[" + tempName + "];");
+                    emitEnd(restParam);
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function emitAccessor(node) {
+                write(node.kind === 149 ? "get " : "set ");
+                emit(node.name);
+                emitSignatureAndBody(node);
+            }
+            function shouldEmitAsArrowFunction(node) {
+                return node.kind === 180 && languageVersion >= 2;
+            }
+            function emitDeclarationName(node) {
+                if (node.name) {
+                    emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                }
+                else {
+                    write(getGeneratedNameForNode(node));
+                }
+            }
+            function shouldEmitFunctionName(node) {
+                if (node.kind === 179) {
+                    return !!node.name;
+                }
+                if (node.kind === 220) {
+                    return !!node.name || modulekind !== ts.ModuleKind.ES6;
+                }
+            }
+            function emitFunctionDeclaration(node) {
+                if (ts.nodeIsMissing(node.body)) {
+                    return emitCommentsOnNotEmittedNode(node);
+                }
+                var kind = node.kind, parent = node.parent;
+                if (kind !== 147 &&
+                    kind !== 146 &&
+                    parent &&
+                    parent.kind !== 253 &&
+                    parent.kind !== 174 &&
+                    parent.kind !== 170) {
+                    emitLeadingComments(node);
+                }
+                emitStart(node);
+                if (!shouldEmitAsArrowFunction(node)) {
+                    if (isES6ExportedDeclaration(node)) {
+                        write("export ");
+                        if (node.flags & 512) {
+                            write("default ");
+                        }
+                    }
+                    write("function");
+                    if (languageVersion >= 2 && node.asteriskToken) {
+                        write("*");
+                    }
+                    write(" ");
+                }
+                if (shouldEmitFunctionName(node)) {
+                    emitDeclarationName(node);
+                }
+                emitSignatureAndBody(node);
+                if (modulekind !== ts.ModuleKind.ES6 && kind === 220 && parent === currentSourceFile && node.name) {
+                    emitExportMemberAssignments(node.name);
+                }
+                emitEnd(node);
+                if (kind !== 147 &&
+                    kind !== 146 &&
+                    kind !== 180) {
+                    emitTrailingComments(node);
+                }
+            }
+            function emitCaptureThisForNodeIfNecessary(node) {
+                if (resolver.getNodeCheckFlags(node) & 4) {
+                    writeLine();
+                    emitStart(node);
+                    write("var _this = this;");
+                    emitEnd(node);
+                }
+            }
+            function emitSignatureParameters(node) {
+                increaseIndent();
+                write("(");
+                if (node) {
+                    var parameters = node.parameters;
+                    var skipCount = node.parameters.length && node.parameters[0].name.text === "this" ? 1 : 0;
+                    var omitCount = languageVersion < 2 && ts.hasDeclaredRestParameter(node) ? 1 : 0;
+                    emitList(parameters, skipCount, parameters.length - omitCount - skipCount, false, false);
+                }
+                write(")");
+                decreaseIndent();
+            }
+            function emitSignatureParametersForArrow(node) {
+                if (node.parameters.length === 1 && node.pos === node.parameters[0].pos) {
+                    emit(node.parameters[0]);
+                    return;
+                }
+                emitSignatureParameters(node);
+            }
+            function emitAsyncFunctionBodyForES6(node) {
+                var promiseConstructor = ts.getEntityNameFromTypeNode(node.type);
+                var isArrowFunction = node.kind === 180;
+                var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192) !== 0;
+                if (!isArrowFunction) {
+                    write(" {");
+                    increaseIndent();
+                    writeLine();
+                    if (resolver.getNodeCheckFlags(node) & 4096) {
+                        writeLines("\nconst _super = (function (geti, seti) {\n    const cache = Object.create(null);\n    return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);");
+                        writeLine();
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & 2048) {
+                        write("const _super = name => super[name];");
+                        writeLine();
+                    }
+                    write("return");
+                }
+                write(" __awaiter(this");
+                if (hasLexicalArguments) {
+                    write(", arguments, ");
+                }
+                else {
+                    write(", void 0, ");
+                }
+                if (languageVersion >= 2 || !promiseConstructor) {
+                    write("void 0");
+                }
+                else {
+                    emitEntityNameAsExpression(promiseConstructor, false);
+                }
+                write(", function* ()");
+                emitFunctionBody(node);
+                write(")");
+                if (!isArrowFunction) {
+                    write(";");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function emitFunctionBody(node) {
+                if (!node.body) {
+                    write(" { }");
+                }
+                else {
+                    if (node.body.kind === 199) {
+                        emitBlockFunctionBody(node, node.body);
+                    }
+                    else {
+                        emitExpressionFunctionBody(node, node.body);
+                    }
+                }
+            }
+            function emitSignatureAndBody(node) {
+                var saveConvertedLoopState = convertedLoopState;
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                if (shouldEmitAsArrowFunction(node)) {
+                    emitSignatureParametersForArrow(node);
+                    write(" =>");
+                }
+                else {
+                    emitSignatureParameters(node);
+                }
+                var isAsync = ts.isAsyncFunctionLike(node);
+                if (isAsync) {
+                    emitAsyncFunctionBodyForES6(node);
+                }
+                else {
+                    emitFunctionBody(node);
+                }
+                if (!isES6ExportedDeclaration(node)) {
+                    emitExportMemberAssignment(node);
+                }
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+            }
+            function emitFunctionBodyPreamble(node) {
+                emitCaptureThisForNodeIfNecessary(node);
+                emitDefaultValueAssignments(node);
+                emitRestParameter(node);
+            }
+            function emitExpressionFunctionBody(node, body) {
+                if (languageVersion < 2 || node.flags & 256) {
+                    emitDownLevelExpressionFunctionBody(node, body);
+                    return;
+                }
+                write(" ");
+                var current = body;
+                while (current.kind === 177) {
+                    current = current.expression;
+                }
+                emitParenthesizedIf(body, current.kind === 171);
+            }
+            function emitDownLevelExpressionFunctionBody(node, body) {
+                write(" {");
+                increaseIndent();
+                var outPos = writer.getTextPos();
+                emitDetachedCommentsAndUpdateCommentsInfo(node.body);
+                emitFunctionBodyPreamble(node);
+                var preambleEmitted = writer.getTextPos() !== outPos;
+                decreaseIndent();
+                if (!preambleEmitted && nodeStartPositionsAreOnSameLine(node, body)) {
+                    write(" ");
+                    emitStart(body);
+                    write("return ");
+                    emit(body);
+                    emitEnd(body);
+                    write(";");
+                    emitTempDeclarations(false);
+                    write(" ");
+                }
+                else {
+                    increaseIndent();
+                    writeLine();
+                    emitLeadingComments(node.body);
+                    emitStart(body);
+                    write("return ");
+                    emit(body);
+                    emitEnd(body);
+                    write(";");
+                    emitTrailingComments(node.body);
+                    emitTempDeclarations(true);
+                    decreaseIndent();
+                    writeLine();
+                }
+                emitStart(node.body);
+                write("}");
+                emitEnd(node.body);
+            }
+            function emitBlockFunctionBody(node, body) {
+                write(" {");
+                var initialTextPos = writer.getTextPos();
+                increaseIndent();
+                emitDetachedCommentsAndUpdateCommentsInfo(body.statements);
+                var startIndex = emitDirectivePrologues(body.statements, true);
+                emitFunctionBodyPreamble(node);
+                decreaseIndent();
+                var preambleEmitted = writer.getTextPos() !== initialTextPos;
+                if (!preambleEmitted && nodeEndIsOnSameLineAsNodeStart(body, body)) {
+                    for (var _a = 0, _b = body.statements; _a < _b.length; _a++) {
+                        var statement = _b[_a];
+                        write(" ");
+                        emit(statement);
+                    }
+                    emitTempDeclarations(false);
+                    write(" ");
+                    emitLeadingCommentsOfPosition(body.statements.end);
+                }
+                else {
+                    increaseIndent();
+                    emitLinesStartingAt(body.statements, startIndex);
+                    emitTempDeclarations(true);
+                    writeLine();
+                    emitLeadingCommentsOfPosition(body.statements.end);
+                    decreaseIndent();
+                }
+                emitToken(16, body.statements.end);
+            }
+            function getSuperCallAtGivenIndex(ctor, index) {
+                if (!ctor.body) {
+                    return undefined;
+                }
+                var statements = ctor.body.statements;
+                if (!statements || index >= statements.length) {
+                    return undefined;
+                }
+                var statement = statements[index];
+                if (statement.kind === 202) {
+                    return ts.isSuperCallExpression(statement.expression) ? statement : undefined;
+                }
+            }
+            function emitParameterPropertyAssignments(node) {
+                ts.forEach(node.parameters, function (param) {
+                    if (param.flags & 92) {
+                        writeLine();
+                        emitStart(param);
+                        emitStart(param.name);
+                        write("this.");
+                        emitNodeWithoutSourceMap(param.name);
+                        emitEnd(param.name);
+                        write(" = ");
+                        emit(param.name);
+                        write(";");
+                        emitEnd(param);
+                    }
+                });
+            }
+            function emitMemberAccessForPropertyName(memberName) {
+                if (memberName.kind === 9 || memberName.kind === 8) {
+                    write("[");
+                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
+                    write("]");
+                }
+                else if (memberName.kind === 140) {
+                    emitComputedPropertyName(memberName);
+                }
+                else {
+                    write(".");
+                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
+                }
+            }
+            function getInitializedProperties(node, isStatic) {
+                var properties = [];
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    if (member.kind === 145 && isStatic === ((member.flags & 32) !== 0) && member.initializer) {
+                        properties.push(member);
+                    }
+                }
+                return properties;
+            }
+            function emitPropertyDeclarations(node, properties) {
+                for (var _a = 0, properties_6 = properties; _a < properties_6.length; _a++) {
+                    var property = properties_6[_a];
+                    emitPropertyDeclaration(node, property);
+                }
+            }
+            function emitPropertyDeclaration(node, property, receiver, isExpression) {
+                writeLine();
+                emitLeadingComments(property);
+                emitStart(property);
+                emitStart(property.name);
+                if (receiver) {
+                    emit(receiver);
+                }
+                else {
+                    if (property.flags & 32) {
+                        emitDeclarationName(node);
+                    }
+                    else {
+                        write("this");
+                    }
+                }
+                emitMemberAccessForPropertyName(property.name);
+                emitEnd(property.name);
+                write(" = ");
+                emit(property.initializer);
+                if (!isExpression) {
+                    write(";");
+                }
+                emitEnd(property);
+                emitTrailingComments(property);
+            }
+            function emitMemberFunctionsForES5AndLower(node) {
+                ts.forEach(node.members, function (member) {
+                    if (member.kind === 198) {
+                        writeLine();
+                        write(";");
+                    }
+                    else if (member.kind === 147 || node.kind === 146) {
+                        if (!member.body) {
+                            return emitCommentsOnNotEmittedNode(member);
+                        }
+                        writeLine();
+                        emitLeadingComments(member);
+                        emitStart(member);
+                        emitStart(member.name);
+                        emitClassMemberPrefix(node, member);
+                        emitMemberAccessForPropertyName(member.name);
+                        emitEnd(member.name);
+                        write(" = ");
+                        emitFunctionDeclaration(member);
+                        emitEnd(member);
+                        write(";");
+                        emitTrailingComments(member);
+                    }
+                    else if (member.kind === 149 || member.kind === 150) {
+                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
+                        if (member === accessors.firstAccessor) {
+                            writeLine();
+                            emitStart(member);
+                            write("Object.defineProperty(");
+                            emitStart(member.name);
+                            emitClassMemberPrefix(node, member);
+                            write(", ");
+                            emitExpressionForPropertyName(member.name);
+                            emitEnd(member.name);
+                            write(", {");
+                            increaseIndent();
+                            if (accessors.getAccessor) {
+                                writeLine();
+                                emitLeadingComments(accessors.getAccessor);
+                                write("get: ");
+                                emitStart(accessors.getAccessor);
+                                write("function ");
+                                emitSignatureAndBody(accessors.getAccessor);
+                                emitEnd(accessors.getAccessor);
+                                emitTrailingComments(accessors.getAccessor);
+                                write(",");
+                            }
+                            if (accessors.setAccessor) {
+                                writeLine();
+                                emitLeadingComments(accessors.setAccessor);
+                                write("set: ");
+                                emitStart(accessors.setAccessor);
+                                write("function ");
+                                emitSignatureAndBody(accessors.setAccessor);
+                                emitEnd(accessors.setAccessor);
+                                emitTrailingComments(accessors.setAccessor);
+                                write(",");
+                            }
+                            writeLine();
+                            write("enumerable: true,");
+                            writeLine();
+                            write("configurable: true");
+                            decreaseIndent();
+                            writeLine();
+                            write("});");
+                            emitEnd(member);
+                        }
+                    }
+                });
+            }
+            function emitMemberFunctionsForES6AndHigher(node) {
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    if ((member.kind === 147 || node.kind === 146) && !member.body) {
+                        emitCommentsOnNotEmittedNode(member);
+                    }
+                    else if (member.kind === 147 ||
+                        member.kind === 149 ||
+                        member.kind === 150) {
+                        writeLine();
+                        emitLeadingComments(member);
+                        emitStart(member);
+                        if (member.flags & 32) {
+                            write("static ");
+                        }
+                        if (member.kind === 149) {
+                            write("get ");
+                        }
+                        else if (member.kind === 150) {
+                            write("set ");
+                        }
+                        if (member.asteriskToken) {
+                            write("*");
+                        }
+                        emit(member.name);
+                        emitSignatureAndBody(member);
+                        emitEnd(member);
+                        emitTrailingComments(member);
+                    }
+                    else if (member.kind === 198) {
+                        writeLine();
+                        write(";");
+                    }
+                }
+            }
+            function emitConstructor(node, baseTypeElement) {
+                var saveConvertedLoopState = convertedLoopState;
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                emitConstructorWorker(node, baseTypeElement);
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+            }
+            function emitConstructorWorker(node, baseTypeElement) {
+                var hasInstancePropertyWithInitializer = false;
+                ts.forEach(node.members, function (member) {
+                    if (member.kind === 148 && !member.body) {
+                        emitCommentsOnNotEmittedNode(member);
+                    }
+                    if (member.kind === 145 && member.initializer && (member.flags & 32) === 0) {
+                        hasInstancePropertyWithInitializer = true;
+                    }
+                });
+                var ctor = ts.getFirstConstructorWithBody(node);
+                if (languageVersion >= 2 && !ctor && !hasInstancePropertyWithInitializer) {
+                    return;
+                }
+                if (ctor) {
+                    emitLeadingComments(ctor);
+                }
+                emitStart(ctor || node);
+                if (languageVersion < 2) {
+                    write("function ");
+                    emitDeclarationName(node);
+                    emitSignatureParameters(ctor);
+                }
+                else {
+                    write("constructor");
+                    if (ctor) {
+                        emitSignatureParameters(ctor);
+                    }
+                    else {
+                        if (baseTypeElement) {
+                            write("(...args)");
+                        }
+                        else {
+                            write("()");
+                        }
+                    }
+                }
+                var startIndex = 0;
+                write(" {");
+                increaseIndent();
+                if (ctor) {
+                    startIndex = emitDirectivePrologues(ctor.body.statements, true);
+                    emitDetachedCommentsAndUpdateCommentsInfo(ctor.body.statements);
+                }
+                emitCaptureThisForNodeIfNecessary(node);
+                var superCall;
+                if (ctor) {
+                    emitDefaultValueAssignments(ctor);
+                    emitRestParameter(ctor);
+                    if (baseTypeElement) {
+                        superCall = getSuperCallAtGivenIndex(ctor, startIndex);
+                        if (superCall) {
+                            writeLine();
+                            emit(superCall);
+                        }
+                    }
+                    emitParameterPropertyAssignments(ctor);
+                }
+                else {
+                    if (baseTypeElement) {
+                        writeLine();
+                        emitStart(baseTypeElement);
+                        if (languageVersion < 2) {
+                            write("_super.apply(this, arguments);");
+                        }
+                        else {
+                            write("super(...args);");
+                        }
+                        emitEnd(baseTypeElement);
+                    }
+                }
+                emitPropertyDeclarations(node, getInitializedProperties(node, false));
+                if (ctor) {
+                    var statements = ctor.body.statements;
+                    if (superCall) {
+                        statements = statements.slice(1);
+                    }
+                    emitLinesStartingAt(statements, startIndex);
+                }
+                emitTempDeclarations(true);
+                writeLine();
+                if (ctor) {
+                    emitLeadingCommentsOfPosition(ctor.body.statements.end);
+                }
+                decreaseIndent();
+                emitToken(16, ctor ? ctor.body.statements.end : node.members.end);
+                emitEnd(ctor || node);
+                if (ctor) {
+                    emitTrailingComments(ctor);
+                }
+            }
+            function emitClassExpression(node) {
+                return emitClassLikeDeclaration(node);
+            }
+            function emitClassDeclaration(node) {
+                return emitClassLikeDeclaration(node);
+            }
+            function emitClassLikeDeclaration(node) {
+                if (languageVersion < 2) {
+                    emitClassLikeDeclarationBelowES6(node);
+                }
+                else {
+                    emitClassLikeDeclarationForES6AndHigher(node);
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile && node.name) {
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            function emitClassLikeDeclarationForES6AndHigher(node) {
+                var decoratedClassAlias;
+                var isHoistedDeclarationInSystemModule = shouldHoistDeclarationInSystemJsModule(node);
+                var isDecorated = ts.nodeIsDecorated(node);
+                var rewriteAsClassExpression = isDecorated || isHoistedDeclarationInSystemModule;
+                if (node.kind === 221) {
+                    if (rewriteAsClassExpression) {
+                        if (isDecorated && resolver.getNodeCheckFlags(node) & 524288) {
+                            decoratedClassAlias = ts.unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default"));
+                            decoratedClassAliases[ts.getNodeId(node)] = decoratedClassAlias;
+                        }
+                        if (isES6ExportedDeclaration(node) && !(node.flags & 512) && decoratedClassAlias === undefined) {
+                            write("export ");
+                        }
+                        if (!isHoistedDeclarationInSystemModule) {
+                            write("let ");
+                        }
+                        if (decoratedClassAlias !== undefined) {
+                            write("" + decoratedClassAlias);
+                        }
+                        else {
+                            emitDeclarationName(node);
+                        }
+                        write(" = ");
+                    }
+                    else if (isES6ExportedDeclaration(node)) {
+                        write("export ");
+                        if (node.flags & 512) {
+                            write("default ");
+                        }
+                    }
+                }
+                var staticProperties = getInitializedProperties(node, true);
+                var isClassExpressionWithStaticProperties = staticProperties.length > 0 && node.kind === 192;
+                var tempVariable;
+                if (isClassExpressionWithStaticProperties) {
+                    tempVariable = createAndRecordTempVariable(0);
+                    write("(");
+                    increaseIndent();
+                    emit(tempVariable);
+                    write(" = ");
+                }
+                write("class");
+                if (node.name || (node.flags & 512 && (staticProperties.length > 0 || modulekind !== ts.ModuleKind.ES6) && !rewriteAsClassExpression)) {
+                    write(" ");
+                    emitDeclarationName(node);
+                }
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+                if (baseTypeNode) {
+                    write(" extends ");
+                    emit(baseTypeNode.expression);
+                }
+                write(" {");
+                increaseIndent();
+                writeLine();
+                emitConstructor(node, baseTypeNode);
+                emitMemberFunctionsForES6AndHigher(node);
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.members.end);
+                if (rewriteAsClassExpression) {
+                    if (decoratedClassAlias !== undefined) {
+                        write(";");
+                        writeLine();
+                        if (isES6ExportedDeclaration(node) && !(node.flags & 512)) {
+                            write("export ");
+                        }
+                        write("let ");
+                        emitDeclarationName(node);
+                        write(" = " + decoratedClassAlias);
+                    }
+                    decoratedClassAliases[ts.getNodeId(node)] = undefined;
+                    write(";");
+                }
+                if (isClassExpressionWithStaticProperties) {
+                    for (var _a = 0, staticProperties_1 = staticProperties; _a < staticProperties_1.length; _a++) {
+                        var property = staticProperties_1[_a];
+                        write(",");
+                        writeLine();
+                        emitPropertyDeclaration(node, property, tempVariable, true);
+                    }
+                    write(",");
+                    writeLine();
+                    emit(tempVariable);
+                    decreaseIndent();
+                    write(")");
+                }
+                else {
+                    writeLine();
+                    emitPropertyDeclarations(node, staticProperties);
+                    emitDecoratorsOfClass(node, decoratedClassAlias);
+                }
+                if (!(node.flags & 1)) {
+                    return;
+                }
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    emitExportMemberAssignment(node);
+                }
+                else {
+                    if (node.flags & 512) {
+                        if (isDecorated) {
+                            writeLine();
+                            write("export default ");
+                            emitDeclarationName(node);
+                            write(";");
+                        }
+                    }
+                    else if (node.parent.kind !== 256) {
+                        writeLine();
+                        emitStart(node);
+                        emitModuleMemberName(node);
+                        write(" = ");
+                        emitDeclarationName(node);
+                        emitEnd(node);
+                        write(";");
+                    }
+                }
+            }
+            function emitClassLikeDeclarationBelowES6(node) {
+                if (node.kind === 221) {
+                    if (!shouldHoistDeclarationInSystemJsModule(node)) {
+                        write("var ");
+                    }
+                    emitDeclarationName(node);
+                    write(" = ");
+                }
+                write("(function (");
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+                if (baseTypeNode) {
+                    write("_super");
+                }
+                write(") {");
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                var saveComputedPropertyNamesToGeneratedNames = computedPropertyNamesToGeneratedNames;
+                var saveConvertedLoopState = convertedLoopState;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                computedPropertyNamesToGeneratedNames = undefined;
+                increaseIndent();
+                if (baseTypeNode) {
+                    writeLine();
+                    emitStart(baseTypeNode);
+                    write("__extends(");
+                    emitDeclarationName(node);
+                    write(", _super);");
+                    emitEnd(baseTypeNode);
+                }
+                writeLine();
+                emitConstructor(node, baseTypeNode);
+                emitMemberFunctionsForES5AndLower(node);
+                emitPropertyDeclarations(node, getInitializedProperties(node, true));
+                writeLine();
+                emitDecoratorsOfClass(node, undefined);
+                writeLine();
+                emitToken(16, node.members.end, function () {
+                    write("return ");
+                    emitDeclarationName(node);
+                });
+                write(";");
+                emitTempDeclarations(true);
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+                computedPropertyNamesToGeneratedNames = saveComputedPropertyNamesToGeneratedNames;
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.members.end);
+                emitStart(node);
+                write("(");
+                if (baseTypeNode) {
+                    emit(baseTypeNode.expression);
+                }
+                write("))");
+                if (node.kind === 221) {
+                    write(";");
+                }
+                emitEnd(node);
+                if (node.kind === 221) {
+                    emitExportMemberAssignment(node);
+                }
+            }
+            function emitClassMemberPrefix(node, member) {
+                emitDeclarationName(node);
+                if (!(member.flags & 32)) {
+                    write(".prototype");
+                }
+            }
+            function emitDecoratorsOfClass(node, decoratedClassAlias) {
+                emitDecoratorsOfMembers(node, 0);
+                emitDecoratorsOfMembers(node, 32);
+                emitDecoratorsOfConstructor(node, decoratedClassAlias);
+            }
+            function emitDecoratorsOfConstructor(node, decoratedClassAlias) {
+                var decorators = node.decorators;
+                var constructor = ts.getFirstConstructorWithBody(node);
+                var firstParameterDecorator = constructor && ts.forEach(constructor.parameters, function (parameter) { return parameter.decorators; });
+                if (!decorators && !firstParameterDecorator) {
+                    return;
+                }
+                writeLine();
+                emitStart(node.decorators || firstParameterDecorator);
+                emitDeclarationName(node);
+                if (decoratedClassAlias !== undefined) {
+                    write(" = " + decoratedClassAlias);
+                }
+                write(" = __decorate([");
+                increaseIndent();
+                writeLine();
+                var decoratorCount = decorators ? decorators.length : 0;
+                var argumentsWritten = emitList(decorators, 0, decoratorCount, true, false, false, true, function (decorator) { return emit(decorator.expression); });
+                if (firstParameterDecorator) {
+                    argumentsWritten += emitDecoratorsOfParameters(constructor, argumentsWritten > 0);
+                }
+                emitSerializedTypeMetadata(node, argumentsWritten >= 0);
+                decreaseIndent();
+                writeLine();
+                write("], ");
+                emitDeclarationName(node);
+                write(")");
+                emitEnd(node.decorators || firstParameterDecorator);
+                write(";");
+                writeLine();
+            }
+            function emitDecoratorsOfMembers(node, staticFlag) {
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    if ((member.flags & 32) !== staticFlag) {
+                        continue;
+                    }
+                    if (!ts.nodeCanBeDecorated(member)) {
+                        continue;
+                    }
+                    var decorators = void 0;
+                    var functionLikeMember = void 0;
+                    if (ts.isAccessor(member)) {
+                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
+                        if (member !== accessors.firstAccessor) {
+                            continue;
+                        }
+                        decorators = accessors.firstAccessor.decorators;
+                        if (!decorators && accessors.secondAccessor) {
+                            decorators = accessors.secondAccessor.decorators;
+                        }
+                        functionLikeMember = accessors.setAccessor;
+                    }
+                    else {
+                        decorators = member.decorators;
+                        if (member.kind === 147) {
+                            functionLikeMember = member;
+                        }
+                    }
+                    var firstParameterDecorator = functionLikeMember && ts.forEach(functionLikeMember.parameters, function (parameter) { return parameter.decorators; });
+                    if (!decorators && !firstParameterDecorator) {
+                        continue;
+                    }
+                    writeLine();
+                    emitStart(decorators || firstParameterDecorator);
+                    write("__decorate([");
+                    increaseIndent();
+                    writeLine();
+                    var decoratorCount = decorators ? decorators.length : 0;
+                    var argumentsWritten = emitList(decorators, 0, decoratorCount, true, false, false, true, function (decorator) { return emit(decorator.expression); });
+                    if (firstParameterDecorator) {
+                        argumentsWritten += emitDecoratorsOfParameters(functionLikeMember, argumentsWritten > 0);
+                    }
+                    emitSerializedTypeMetadata(member, argumentsWritten > 0);
+                    decreaseIndent();
+                    writeLine();
+                    write("], ");
+                    emitClassMemberPrefix(node, member);
+                    write(", ");
+                    emitExpressionForPropertyName(member.name);
+                    if (languageVersion > 0) {
+                        if (member.kind !== 145) {
+                            write(", null");
+                        }
+                        else {
+                            write(", void 0");
+                        }
+                    }
+                    write(")");
+                    emitEnd(decorators || firstParameterDecorator);
+                    write(";");
+                    writeLine();
+                }
+            }
+            function emitDecoratorsOfParameters(node, leadingComma) {
+                var argumentsWritten = 0;
+                if (node) {
+                    var parameterIndex_1 = 0;
+                    for (var _a = 0, _b = node.parameters; _a < _b.length; _a++) {
+                        var parameter = _b[_a];
+                        if (ts.nodeIsDecorated(parameter)) {
+                            var decorators = parameter.decorators;
+                            argumentsWritten += emitList(decorators, 0, decorators.length, true, false, leadingComma, true, function (decorator) {
+                                write("__param(" + parameterIndex_1 + ", ");
+                                emit(decorator.expression);
+                                write(")");
+                            });
+                            leadingComma = true;
+                        }
+                        parameterIndex_1++;
+                    }
+                }
+                return argumentsWritten;
+            }
+            function shouldEmitTypeMetadata(node) {
+                switch (node.kind) {
+                    case 147:
+                    case 149:
+                    case 150:
+                    case 145:
+                        return true;
+                }
+                return false;
+            }
+            function shouldEmitReturnTypeMetadata(node) {
+                switch (node.kind) {
+                    case 147:
+                        return true;
+                }
+                return false;
+            }
+            function shouldEmitParamTypesMetadata(node) {
+                switch (node.kind) {
+                    case 221:
+                    case 147:
+                    case 150:
+                        return true;
+                }
+                return false;
+            }
+            function emitSerializedTypeOfNode(node) {
+                switch (node.kind) {
+                    case 221:
+                        write("Function");
+                        return;
+                    case 145:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 142:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 149:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 150:
+                        emitSerializedTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
+                        return;
+                }
+                if (ts.isFunctionLike(node)) {
+                    write("Function");
+                    return;
+                }
+                write("void 0");
+            }
+            function emitSerializedTypeNode(node) {
+                if (node) {
+                    switch (node.kind) {
+                        case 103:
+                            write("void 0");
+                            return;
+                        case 164:
+                            emitSerializedTypeNode(node.type);
+                            return;
+                        case 156:
+                        case 157:
+                            write("Function");
+                            return;
+                        case 160:
+                        case 161:
+                            write("Array");
+                            return;
+                        case 154:
+                        case 120:
+                            write("Boolean");
+                            return;
+                        case 132:
+                        case 166:
+                            write("String");
+                            return;
+                        case 130:
+                            write("Number");
+                            return;
+                        case 133:
+                            write("Symbol");
+                            return;
+                        case 155:
+                            emitSerializedTypeReferenceNode(node);
+                            return;
+                        case 158:
+                        case 159:
+                        case 162:
+                        case 163:
+                        case 117:
+                        case 165:
+                            break;
+                        default:
+                            ts.Debug.fail("Cannot serialize unexpected type node.");
+                            break;
+                    }
+                }
+                write("Object");
+            }
+            function emitSerializedTypeReferenceNode(node) {
+                var location = node.parent;
+                while (ts.isDeclaration(location) || ts.isTypeNode(location)) {
+                    location = location.parent;
+                }
+                var typeName = ts.cloneEntityName(node.typeName, location);
+                var result = resolver.getTypeReferenceSerializationKind(typeName);
+                switch (result) {
+                    case ts.TypeReferenceSerializationKind.Unknown:
+                        var temp = createAndRecordTempVariable(0);
+                        write("(typeof (");
+                        emitNodeWithoutSourceMap(temp);
+                        write(" = ");
+                        emitEntityNameAsExpression(typeName, true);
+                        write(") === 'function' && ");
+                        emitNodeWithoutSourceMap(temp);
+                        write(") || Object");
+                        break;
+                    case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
+                        emitEntityNameAsExpression(typeName, false);
+                        break;
+                    case ts.TypeReferenceSerializationKind.VoidType:
+                        write("void 0");
+                        break;
+                    case ts.TypeReferenceSerializationKind.BooleanType:
+                        write("Boolean");
+                        break;
+                    case ts.TypeReferenceSerializationKind.NumberLikeType:
+                        write("Number");
+                        break;
+                    case ts.TypeReferenceSerializationKind.StringLikeType:
+                        write("String");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ArrayLikeType:
+                        write("Array");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ESSymbolType:
+                        if (languageVersion < 2) {
+                            write("typeof Symbol === 'function' ? Symbol : Object");
+                        }
+                        else {
+                            write("Symbol");
+                        }
+                        break;
+                    case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
+                        write("Function");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ObjectType:
+                        write("Object");
+                        break;
+                }
+            }
+            function emitSerializedParameterTypesOfNode(node) {
+                if (node) {
+                    var valueDeclaration = void 0;
+                    if (node.kind === 221) {
+                        valueDeclaration = ts.getFirstConstructorWithBody(node);
+                    }
+                    else if (ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)) {
+                        valueDeclaration = node;
+                    }
+                    if (valueDeclaration) {
+                        var parameters = valueDeclaration.parameters;
+                        var parameterCount = parameters.length;
+                        if (parameterCount > 0) {
+                            for (var i = 0; i < parameterCount; i++) {
+                                if (i > 0) {
+                                    write(", ");
+                                }
+                                if (parameters[i].dotDotDotToken) {
+                                    var parameterType = parameters[i].type;
+                                    if (parameterType.kind === 160) {
+                                        parameterType = parameterType.elementType;
+                                    }
+                                    else if (parameterType.kind === 155 && parameterType.typeArguments && parameterType.typeArguments.length === 1) {
+                                        parameterType = parameterType.typeArguments[0];
+                                    }
+                                    else {
+                                        parameterType = undefined;
+                                    }
+                                    emitSerializedTypeNode(parameterType);
+                                }
+                                else {
+                                    emitSerializedTypeOfNode(parameters[i]);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            function emitSerializedReturnTypeOfNode(node) {
+                if (node && ts.isFunctionLike(node) && node.type) {
+                    emitSerializedTypeNode(node.type);
+                    return;
+                }
+                write("void 0");
+            }
+            function emitSerializedTypeMetadata(node, writeComma) {
+                var argumentsWritten = 0;
+                if (compilerOptions.emitDecoratorMetadata) {
+                    if (shouldEmitTypeMetadata(node)) {
+                        if (writeComma) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:type', ");
+                        emitSerializedTypeOfNode(node);
+                        write(")");
+                        argumentsWritten++;
+                    }
+                    if (shouldEmitParamTypesMetadata(node)) {
+                        if (writeComma || argumentsWritten) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:paramtypes', [");
+                        emitSerializedParameterTypesOfNode(node);
+                        write("])");
+                        argumentsWritten++;
+                    }
+                    if (shouldEmitReturnTypeMetadata(node)) {
+                        if (writeComma || argumentsWritten) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:returntype', ");
+                        emitSerializedReturnTypeOfNode(node);
+                        write(")");
+                        argumentsWritten++;
+                    }
+                }
+                return argumentsWritten;
+            }
+            function emitInterfaceDeclaration(node) {
+                emitCommentsOnNotEmittedNode(node);
+            }
+            function shouldEmitEnumDeclaration(node) {
+                var isConstEnum = ts.isConst(node);
+                return !isConstEnum || compilerOptions.preserveConstEnums || compilerOptions.isolatedModules;
+            }
+            function emitEnumDeclaration(node) {
+                if (!shouldEmitEnumDeclaration(node)) {
+                    return;
+                }
+                if (!shouldHoistDeclarationInSystemJsModule(node)) {
+                    var isES6ExportedEnum = isES6ExportedDeclaration(node);
+                    if (!(node.flags & 1) || (isES6ExportedEnum && isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 224))) {
+                        emitStart(node);
+                        if (isES6ExportedEnum) {
+                            write("export ");
+                        }
+                        write("var ");
+                        emit(node.name);
+                        emitEnd(node);
+                        write(";");
+                    }
+                }
+                writeLine();
+                emitStart(node);
+                write("(function (");
+                emitStart(node.name);
+                write(getGeneratedNameForNode(node));
+                emitEnd(node.name);
+                write(") {");
+                increaseIndent();
+                emitLines(node.members);
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.members.end);
+                write(")(");
+                emitModuleMemberName(node);
+                write(" || (");
+                emitModuleMemberName(node);
+                write(" = {}));");
+                emitEnd(node);
+                if (!isES6ExportedDeclaration(node) && node.flags & 1 && !shouldHoistDeclarationInSystemJsModule(node)) {
+                    writeLine();
+                    emitStart(node);
+                    write("var ");
+                    emit(node.name);
+                    write(" = ");
+                    emitModuleMemberName(node);
+                    emitEnd(node);
+                    write(";");
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
+                    if (modulekind === ts.ModuleKind.System && (node.flags & 1)) {
+                        writeLine();
+                        write(exportFunctionForFile + "(\"");
+                        emitDeclarationName(node);
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(");");
+                    }
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            function emitEnumMember(node) {
+                var enumParent = node.parent;
+                emitStart(node);
+                write(getGeneratedNameForNode(enumParent));
+                write("[");
+                write(getGeneratedNameForNode(enumParent));
+                write("[");
+                emitExpressionForPropertyName(node.name);
+                write("] = ");
+                writeEnumMemberDeclarationValue(node);
+                write("] = ");
+                emitExpressionForPropertyName(node.name);
+                emitEnd(node);
+                write(";");
+            }
+            function writeEnumMemberDeclarationValue(member) {
+                var value = resolver.getConstantValue(member);
+                if (value !== undefined) {
+                    write(value.toString());
+                    return;
+                }
+                else if (member.initializer) {
+                    emit(member.initializer);
+                }
+                else {
+                    write("undefined");
+                }
+            }
+            function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
+                if (moduleDeclaration.body.kind === 225) {
+                    var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
+                    return recursiveInnerModule || moduleDeclaration.body;
+                }
+            }
+            function shouldEmitModuleDeclaration(node) {
+                return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules);
+            }
+            function isModuleMergedWithES6Class(node) {
+                return languageVersion === 2 && !!(resolver.getNodeCheckFlags(node) & 32768);
+            }
+            function isFirstDeclarationOfKind(node, declarations, kind) {
+                return !ts.forEach(declarations, function (declaration) { return declaration.kind === kind && declaration.pos < node.pos; });
+            }
+            function emitModuleDeclaration(node) {
+                var shouldEmit = shouldEmitModuleDeclaration(node);
+                if (!shouldEmit) {
+                    return emitCommentsOnNotEmittedNode(node);
+                }
+                var hoistedInDeclarationScope = shouldHoistDeclarationInSystemJsModule(node);
+                var emitVarForModule = !hoistedInDeclarationScope && !isModuleMergedWithES6Class(node);
+                if (emitVarForModule) {
+                    var isES6ExportedNamespace = isES6ExportedDeclaration(node);
+                    if (!isES6ExportedNamespace || isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 225)) {
+                        emitStart(node);
+                        if (isES6ExportedNamespace) {
+                            write("export ");
+                        }
+                        write("var ");
+                        emit(node.name);
+                        write(";");
+                        emitEnd(node);
+                        writeLine();
+                    }
+                }
+                emitStart(node);
+                write("(function (");
+                emitStart(node.name);
+                write(getGeneratedNameForNode(node));
+                emitEnd(node.name);
+                write(") ");
+                if (node.body.kind === 226) {
+                    var saveConvertedLoopState = convertedLoopState;
+                    var saveTempFlags = tempFlags;
+                    var saveTempVariables = tempVariables;
+                    convertedLoopState = undefined;
+                    tempFlags = 0;
+                    tempVariables = undefined;
+                    emit(node.body);
+                    ts.Debug.assert(convertedLoopState === undefined);
+                    convertedLoopState = saveConvertedLoopState;
+                    tempFlags = saveTempFlags;
+                    tempVariables = saveTempVariables;
+                }
+                else {
+                    write("{");
+                    increaseIndent();
+                    emitCaptureThisForNodeIfNecessary(node);
+                    writeLine();
+                    emit(node.body);
+                    decreaseIndent();
+                    writeLine();
+                    var moduleBlock = getInnerMostModuleDeclarationFromDottedModule(node).body;
+                    emitToken(16, moduleBlock.statements.end);
+                }
+                write(")(");
+                if ((node.flags & 1) && !isES6ExportedDeclaration(node)) {
+                    emit(node.name);
+                    write(" = ");
+                }
+                emitModuleMemberName(node);
+                write(" || (");
+                emitModuleMemberName(node);
+                write(" = {}));");
+                emitEnd(node);
+                if (!isES6ExportedDeclaration(node) && node.name.kind === 69 && node.parent === currentSourceFile) {
+                    if (modulekind === ts.ModuleKind.System && (node.flags & 1)) {
+                        writeLine();
+                        write(exportFunctionForFile + "(\"");
+                        emitDeclarationName(node);
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(");");
+                    }
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            function tryRenameExternalModule(moduleName) {
+                if (renamedDependencies && ts.hasProperty(renamedDependencies, moduleName.text)) {
+                    return "\"" + renamedDependencies[moduleName.text] + "\"";
+                }
+                return undefined;
+            }
+            function emitRequire(moduleName) {
+                if (moduleName.kind === 9) {
+                    write("require(");
+                    var text = tryRenameExternalModule(moduleName);
+                    if (text) {
+                        write(text);
+                    }
+                    else {
+                        emitStart(moduleName);
+                        emitLiteral(moduleName);
+                        emitEnd(moduleName);
+                    }
+                    emitToken(18, moduleName.end);
+                }
+                else {
+                    write("require()");
+                }
+            }
+            function getNamespaceDeclarationNode(node) {
+                if (node.kind === 229) {
+                    return node;
+                }
+                var importClause = node.importClause;
+                if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232) {
+                    return importClause.namedBindings;
+                }
+            }
+            function isDefaultImport(node) {
+                return node.kind === 230 && node.importClause && !!node.importClause.name;
+            }
+            function emitExportImportAssignments(node) {
+                if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
+                    emitExportMemberAssignments(node.name);
+                }
+                ts.forEachChild(node, emitExportImportAssignments);
+            }
+            function emitImportDeclaration(node) {
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    return emitExternalImportDeclaration(node);
+                }
+                if (node.importClause) {
+                    var shouldEmitDefaultBindings = resolver.isReferencedAliasDeclaration(node.importClause);
+                    var shouldEmitNamedBindings = node.importClause.namedBindings && resolver.isReferencedAliasDeclaration(node.importClause.namedBindings, true);
+                    if (shouldEmitDefaultBindings || shouldEmitNamedBindings) {
+                        write("import ");
+                        emitStart(node.importClause);
+                        if (shouldEmitDefaultBindings) {
+                            emit(node.importClause.name);
+                            if (shouldEmitNamedBindings) {
+                                write(", ");
+                            }
+                        }
+                        if (shouldEmitNamedBindings) {
+                            emitLeadingComments(node.importClause.namedBindings);
+                            emitStart(node.importClause.namedBindings);
+                            if (node.importClause.namedBindings.kind === 232) {
+                                write("* as ");
+                                emit(node.importClause.namedBindings.name);
+                            }
+                            else {
+                                write("{ ");
+                                emitExportOrImportSpecifierList(node.importClause.namedBindings.elements, resolver.isReferencedAliasDeclaration);
+                                write(" }");
+                            }
+                            emitEnd(node.importClause.namedBindings);
+                            emitTrailingComments(node.importClause.namedBindings);
+                        }
+                        emitEnd(node.importClause);
+                        write(" from ");
+                        emit(node.moduleSpecifier);
+                        write(";");
+                    }
+                }
+                else {
+                    write("import ");
+                    emit(node.moduleSpecifier);
+                    write(";");
+                }
+            }
+            function emitExternalImportDeclaration(node) {
+                if (ts.contains(externalImports, node)) {
+                    var isExportedImport = node.kind === 229 && (node.flags & 1) !== 0;
+                    var namespaceDeclaration = getNamespaceDeclarationNode(node);
+                    var varOrConst = (languageVersion <= 1) ? "var " : "const ";
+                    if (modulekind !== ts.ModuleKind.AMD) {
+                        emitLeadingComments(node);
+                        emitStart(node);
+                        if (namespaceDeclaration && !isDefaultImport(node)) {
+                            if (!isExportedImport) {
+                                write(varOrConst);
+                            }
+                            ;
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                        }
+                        else {
+                            var isNakedImport = 230 && !node.importClause;
+                            if (!isNakedImport) {
+                                write(varOrConst);
+                                write(getGeneratedNameForNode(node));
+                                write(" = ");
+                            }
+                        }
+                        emitRequire(ts.getExternalModuleName(node));
+                        if (namespaceDeclaration && isDefaultImport(node)) {
+                            write(", ");
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            write(getGeneratedNameForNode(node));
+                        }
+                        write(";");
+                        emitEnd(node);
+                        emitExportImportAssignments(node);
+                        emitTrailingComments(node);
+                    }
+                    else {
+                        if (isExportedImport) {
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            emit(namespaceDeclaration.name);
+                            write(";");
+                        }
+                        else if (namespaceDeclaration && isDefaultImport(node)) {
+                            write(varOrConst);
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            write(getGeneratedNameForNode(node));
+                            write(";");
+                        }
+                        emitExportImportAssignments(node);
+                    }
+                }
+            }
+            function emitImportEqualsDeclaration(node) {
+                if (ts.isExternalModuleImportEqualsDeclaration(node)) {
+                    emitExternalImportDeclaration(node);
+                    return;
+                }
+                if (resolver.isReferencedAliasDeclaration(node) ||
+                    (!isCurrentFileExternalModule && resolver.isTopLevelValueImportEqualsWithEntityName(node))) {
+                    emitLeadingComments(node);
+                    emitStart(node);
+                    var variableDeclarationIsHoisted = shouldHoistVariable(node, true);
+                    var isExported = isSourceFileLevelDeclarationInSystemJsModule(node, true);
+                    if (!variableDeclarationIsHoisted) {
+                        ts.Debug.assert(!isExported);
+                        if (isES6ExportedDeclaration(node)) {
+                            write("export ");
+                            write("var ");
+                        }
+                        else if (!(node.flags & 1)) {
+                            write("var ");
+                        }
+                    }
+                    if (isExported) {
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithoutSourceMap(node.name);
+                        write("\", ");
+                    }
+                    emitModuleMemberName(node);
+                    write(" = ");
+                    emit(node.moduleReference);
+                    if (isExported) {
+                        write(")");
+                    }
+                    write(";");
+                    emitEnd(node);
+                    emitExportImportAssignments(node);
+                    emitTrailingComments(node);
+                }
+            }
+            function emitExportDeclaration(node) {
+                ts.Debug.assert(modulekind !== ts.ModuleKind.System);
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    if (node.moduleSpecifier && (!node.exportClause || resolver.isValueAliasDeclaration(node))) {
+                        emitStart(node);
+                        var generatedName = getGeneratedNameForNode(node);
+                        if (node.exportClause) {
+                            if (modulekind !== ts.ModuleKind.AMD) {
+                                write("var ");
+                                write(generatedName);
+                                write(" = ");
+                                emitRequire(ts.getExternalModuleName(node));
+                                write(";");
+                            }
+                            for (var _a = 0, _b = node.exportClause.elements; _a < _b.length; _a++) {
+                                var specifier = _b[_a];
+                                if (resolver.isValueAliasDeclaration(specifier)) {
+                                    writeLine();
+                                    emitStart(specifier);
+                                    emitContainingModuleName(specifier);
+                                    write(".");
+                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                                    write(" = ");
+                                    write(generatedName);
+                                    write(".");
+                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.propertyName || specifier.name);
+                                    write(";");
+                                    emitEnd(specifier);
+                                }
+                            }
+                        }
+                        else {
+                            if (hasExportStarsToExportValues && resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
+                                writeLine();
+                                write("__export(");
+                                if (modulekind !== ts.ModuleKind.AMD) {
+                                    emitRequire(ts.getExternalModuleName(node));
+                                }
+                                else {
+                                    write(generatedName);
+                                }
+                                write(");");
+                            }
+                        }
+                        emitEnd(node);
+                    }
+                }
+                else {
+                    if (!node.exportClause || resolver.isValueAliasDeclaration(node)) {
+                        write("export ");
+                        if (node.exportClause) {
+                            write("{ ");
+                            emitExportOrImportSpecifierList(node.exportClause.elements, resolver.isValueAliasDeclaration);
+                            write(" }");
+                        }
+                        else {
+                            write("*");
+                        }
+                        if (node.moduleSpecifier) {
+                            write(" from ");
+                            emit(node.moduleSpecifier);
+                        }
+                        write(";");
+                    }
+                }
+            }
+            function emitExportOrImportSpecifierList(specifiers, shouldEmit) {
+                ts.Debug.assert(modulekind === ts.ModuleKind.ES6);
+                var needsComma = false;
+                for (var _a = 0, specifiers_1 = specifiers; _a < specifiers_1.length; _a++) {
+                    var specifier = specifiers_1[_a];
+                    if (shouldEmit(specifier)) {
+                        if (needsComma) {
+                            write(", ");
+                        }
+                        if (specifier.propertyName) {
+                            emit(specifier.propertyName);
+                            write(" as ");
+                        }
+                        emit(specifier.name);
+                        needsComma = true;
+                    }
+                }
+            }
+            function emitExportAssignment(node) {
+                if (!node.isExportEquals && resolver.isValueAliasDeclaration(node)) {
+                    if (modulekind === ts.ModuleKind.ES6) {
+                        writeLine();
+                        emitStart(node);
+                        write("export default ");
+                        var expression = node.expression;
+                        emit(expression);
+                        if (expression.kind !== 220 &&
+                            expression.kind !== 221) {
+                            write(";");
+                        }
+                        emitEnd(node);
+                    }
+                    else {
+                        writeLine();
+                        emitStart(node);
+                        if (modulekind === ts.ModuleKind.System) {
+                            write(exportFunctionForFile + "(\"default\",");
+                            emit(node.expression);
+                            write(")");
+                        }
+                        else {
+                            emitEs6ExportDefaultCompat(node);
+                            emitContainingModuleName(node);
+                            if (languageVersion === 0) {
+                                write('["default"] = ');
+                            }
+                            else {
+                                write(".default = ");
+                            }
+                            emit(node.expression);
+                        }
+                        write(";");
+                        emitEnd(node);
+                    }
+                }
+            }
+            function collectExternalModuleInfo(sourceFile) {
+                externalImports = [];
+                exportSpecifiers = {};
+                exportEquals = undefined;
+                hasExportStarsToExportValues = false;
+                for (var _a = 0, _b = sourceFile.statements; _a < _b.length; _a++) {
+                    var node = _b[_a];
+                    switch (node.kind) {
+                        case 230:
+                            if (!node.importClause ||
+                                resolver.isReferencedAliasDeclaration(node.importClause, true)) {
+                                externalImports.push(node);
+                            }
+                            break;
+                        case 229:
+                            if (node.moduleReference.kind === 240 && resolver.isReferencedAliasDeclaration(node)) {
+                                externalImports.push(node);
+                            }
+                            break;
+                        case 236:
+                            if (node.moduleSpecifier) {
+                                if (!node.exportClause) {
+                                    if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
+                                        externalImports.push(node);
+                                        hasExportStarsToExportValues = true;
+                                    }
+                                }
+                                else if (resolver.isValueAliasDeclaration(node)) {
+                                    externalImports.push(node);
+                                }
+                            }
+                            else {
+                                for (var _c = 0, _d = node.exportClause.elements; _c < _d.length; _c++) {
+                                    var specifier = _d[_c];
+                                    var name_30 = (specifier.propertyName || specifier.name).text;
+                                    (exportSpecifiers[name_30] || (exportSpecifiers[name_30] = [])).push(specifier);
+                                }
+                            }
+                            break;
+                        case 235:
+                            if (node.isExportEquals && !exportEquals) {
+                                exportEquals = node;
+                            }
+                            break;
+                    }
+                }
+            }
+            function emitExportStarHelper() {
+                if (hasExportStarsToExportValues) {
+                    writeLine();
+                    write("function __export(m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function getLocalNameForExternalImport(node) {
+                var namespaceDeclaration = getNamespaceDeclarationNode(node);
+                if (namespaceDeclaration && !isDefaultImport(node)) {
+                    return ts.getTextOfNodeFromSourceText(currentText, namespaceDeclaration.name);
+                }
+                if (node.kind === 230 && node.importClause) {
+                    return getGeneratedNameForNode(node);
+                }
+                if (node.kind === 236 && node.moduleSpecifier) {
+                    return getGeneratedNameForNode(node);
+                }
+            }
+            function getExternalModuleNameText(importNode, emitRelativePathAsModuleName) {
+                if (emitRelativePathAsModuleName) {
+                    var name_31 = getExternalModuleNameFromDeclaration(host, resolver, importNode);
+                    if (name_31) {
+                        return "\"" + name_31 + "\"";
+                    }
+                }
+                var moduleName = ts.getExternalModuleName(importNode);
+                if (moduleName.kind === 9) {
+                    return tryRenameExternalModule(moduleName) || getLiteralText(moduleName);
+                }
+                return undefined;
+            }
+            function emitVariableDeclarationsForImports() {
+                if (externalImports.length === 0) {
+                    return;
+                }
+                writeLine();
+                var started = false;
+                for (var _a = 0, externalImports_1 = externalImports; _a < externalImports_1.length; _a++) {
+                    var importNode = externalImports_1[_a];
+                    var skipNode = importNode.kind === 236 ||
+                        (importNode.kind === 230 && !importNode.importClause);
+                    if (skipNode) {
+                        continue;
+                    }
+                    if (!started) {
+                        write("var ");
+                        started = true;
+                    }
+                    else {
+                        write(", ");
+                    }
+                    write(getLocalNameForExternalImport(importNode));
+                }
+                if (started) {
+                    write(";");
+                }
+            }
+            function emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations) {
+                if (!hasExportStarsToExportValues) {
+                    return undefined;
+                }
+                if (!exportedDeclarations && ts.isEmpty(exportSpecifiers)) {
+                    var hasExportDeclarationWithExportClause = false;
+                    for (var _a = 0, externalImports_2 = externalImports; _a < externalImports_2.length; _a++) {
+                        var externalImport = externalImports_2[_a];
+                        if (externalImport.kind === 236 && externalImport.exportClause) {
+                            hasExportDeclarationWithExportClause = true;
+                            break;
+                        }
+                    }
+                    if (!hasExportDeclarationWithExportClause) {
+                        return emitExportStarFunction(undefined);
+                    }
+                }
+                var exportedNamesStorageRef = makeUniqueName("exportedNames");
+                writeLine();
+                write("var " + exportedNamesStorageRef + " = {");
+                increaseIndent();
+                var started = false;
+                if (exportedDeclarations) {
+                    for (var i = 0; i < exportedDeclarations.length; i++) {
+                        writeExportedName(exportedDeclarations[i]);
+                    }
+                }
+                if (exportSpecifiers) {
+                    for (var n in exportSpecifiers) {
+                        for (var _b = 0, _c = exportSpecifiers[n]; _b < _c.length; _b++) {
+                            var specifier = _c[_b];
+                            writeExportedName(specifier.name);
+                        }
+                    }
+                }
+                for (var _d = 0, externalImports_3 = externalImports; _d < externalImports_3.length; _d++) {
+                    var externalImport = externalImports_3[_d];
+                    if (externalImport.kind !== 236) {
+                        continue;
+                    }
+                    var exportDecl = externalImport;
+                    if (!exportDecl.exportClause) {
+                        continue;
+                    }
+                    for (var _e = 0, _f = exportDecl.exportClause.elements; _e < _f.length; _e++) {
+                        var element = _f[_e];
+                        writeExportedName(element.name || element.propertyName);
+                    }
+                }
+                decreaseIndent();
+                writeLine();
+                write("};");
+                return emitExportStarFunction(exportedNamesStorageRef);
+                function emitExportStarFunction(localNames) {
+                    var exportStarFunction = makeUniqueName("exportStar");
+                    writeLine();
+                    write("function " + exportStarFunction + "(m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("var exports = {};");
+                    writeLine();
+                    write("for(var n in m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("if (n !== \"default\"");
+                    if (localNames) {
+                        write("&& !" + localNames + ".hasOwnProperty(n)");
+                    }
+                    write(") exports[n] = m[n];");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                    writeLine();
+                    write(exportFunctionForFile + "(exports);");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                    return exportStarFunction;
+                }
+                function writeExportedName(node) {
+                    if (node.kind !== 69 && node.flags & 512) {
+                        return;
+                    }
+                    if (started) {
+                        write(",");
+                    }
+                    else {
+                        started = true;
+                    }
+                    writeLine();
+                    write("'");
+                    if (node.kind === 69) {
+                        emitNodeWithCommentsAndWithoutSourcemap(node);
+                    }
+                    else {
+                        emitDeclarationName(node);
+                    }
+                    write("': true");
+                }
+            }
+            function processTopLevelVariableAndFunctionDeclarations(node) {
+                var hoistedVars;
+                var hoistedFunctionDeclarations;
+                var exportedDeclarations;
+                visit(node);
+                if (hoistedVars) {
+                    writeLine();
+                    write("var ");
+                    var seen = {};
+                    for (var i = 0; i < hoistedVars.length; i++) {
+                        var local = hoistedVars[i];
+                        var name_32 = local.kind === 69
+                            ? local
+                            : local.name;
+                        if (name_32) {
+                            var text = ts.unescapeIdentifier(name_32.text);
+                            if (ts.hasProperty(seen, text)) {
+                                continue;
+                            }
+                            else {
+                                seen[text] = text;
+                            }
+                        }
+                        if (i !== 0) {
+                            write(", ");
+                        }
+                        if (local.kind === 221 || local.kind === 225 || local.kind === 224) {
+                            emitDeclarationName(local);
+                        }
+                        else {
+                            emit(local);
+                        }
+                        var flags = ts.getCombinedNodeFlags(local.kind === 69 ? local.parent : local);
+                        if (flags & 1) {
+                            if (!exportedDeclarations) {
+                                exportedDeclarations = [];
+                            }
+                            exportedDeclarations.push(local);
+                        }
+                    }
+                    write(";");
+                }
+                if (hoistedFunctionDeclarations) {
+                    for (var _a = 0, hoistedFunctionDeclarations_1 = hoistedFunctionDeclarations; _a < hoistedFunctionDeclarations_1.length; _a++) {
+                        var f = hoistedFunctionDeclarations_1[_a];
+                        writeLine();
+                        emit(f);
+                        if (f.flags & 1) {
+                            if (!exportedDeclarations) {
+                                exportedDeclarations = [];
+                            }
+                            exportedDeclarations.push(f);
+                        }
+                    }
+                }
+                return exportedDeclarations;
+                function visit(node) {
+                    if (node.flags & 2) {
+                        return;
+                    }
+                    if (node.kind === 220) {
+                        if (!hoistedFunctionDeclarations) {
+                            hoistedFunctionDeclarations = [];
+                        }
+                        hoistedFunctionDeclarations.push(node);
+                        return;
+                    }
+                    if (node.kind === 221) {
+                        if (!hoistedVars) {
+                            hoistedVars = [];
+                        }
+                        hoistedVars.push(node);
+                        return;
+                    }
+                    if (node.kind === 224) {
+                        if (shouldEmitEnumDeclaration(node)) {
+                            if (!hoistedVars) {
+                                hoistedVars = [];
+                            }
+                            hoistedVars.push(node);
+                        }
+                        return;
+                    }
+                    if (node.kind === 225) {
+                        if (shouldEmitModuleDeclaration(node)) {
+                            if (!hoistedVars) {
+                                hoistedVars = [];
+                            }
+                            hoistedVars.push(node);
+                        }
+                        return;
+                    }
+                    if (node.kind === 218 || node.kind === 169) {
+                        if (shouldHoistVariable(node, false)) {
+                            var name_33 = node.name;
+                            if (name_33.kind === 69) {
+                                if (!hoistedVars) {
+                                    hoistedVars = [];
+                                }
+                                hoistedVars.push(name_33);
+                            }
+                            else {
+                                ts.forEachChild(name_33, visit);
+                            }
+                        }
+                        return;
+                    }
+                    if (ts.isInternalModuleImportEqualsDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
+                        if (!hoistedVars) {
+                            hoistedVars = [];
+                        }
+                        hoistedVars.push(node.name);
+                        return;
+                    }
+                    if (ts.isBindingPattern(node)) {
+                        ts.forEach(node.elements, visit);
+                        return;
+                    }
+                    if (!ts.isDeclaration(node)) {
+                        ts.forEachChild(node, visit);
+                    }
+                }
+            }
+            function shouldHoistVariable(node, checkIfSourceFileLevelDecl) {
+                if (checkIfSourceFileLevelDecl && !shouldHoistDeclarationInSystemJsModule(node)) {
+                    return false;
+                }
+                return (ts.getCombinedNodeFlags(node) & 3072) === 0 ||
+                    ts.getEnclosingBlockScopeContainer(node).kind === 256;
+            }
+            function isCurrentFileSystemExternalModule() {
+                return modulekind === ts.ModuleKind.System && isCurrentFileExternalModule;
+            }
+            function emitSystemModuleBody(node, dependencyGroups, startIndex) {
+                emitVariableDeclarationsForImports();
+                writeLine();
+                var exportedDeclarations = processTopLevelVariableAndFunctionDeclarations(node);
+                var exportStarFunction = emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations);
+                writeLine();
+                write("return {");
+                increaseIndent();
+                writeLine();
+                emitSetters(exportStarFunction, dependencyGroups);
+                writeLine();
+                emitExecute(node, startIndex);
+                decreaseIndent();
+                writeLine();
+                write("}");
+                emitTempDeclarations(true);
+            }
+            function emitSetters(exportStarFunction, dependencyGroups) {
+                write("setters:[");
+                for (var i = 0; i < dependencyGroups.length; i++) {
+                    if (i !== 0) {
+                        write(",");
+                    }
+                    writeLine();
+                    increaseIndent();
+                    var group = dependencyGroups[i];
+                    var parameterName = makeUniqueName(ts.forEach(group, getLocalNameForExternalImport) || "");
+                    write("function (" + parameterName + ") {");
+                    increaseIndent();
+                    for (var _a = 0, group_1 = group; _a < group_1.length; _a++) {
+                        var entry = group_1[_a];
+                        var importVariableName = getLocalNameForExternalImport(entry) || "";
+                        switch (entry.kind) {
+                            case 230:
+                                if (!entry.importClause) {
+                                    break;
+                                }
+                            case 229:
+                                ts.Debug.assert(importVariableName !== "");
+                                writeLine();
+                                write(importVariableName + " = " + parameterName + ";");
+                                writeLine();
+                                break;
+                            case 236:
+                                ts.Debug.assert(importVariableName !== "");
+                                if (entry.exportClause) {
+                                    writeLine();
+                                    write(exportFunctionForFile + "({");
+                                    writeLine();
+                                    increaseIndent();
+                                    for (var i_1 = 0, len = entry.exportClause.elements.length; i_1 < len; i_1++) {
+                                        if (i_1 !== 0) {
+                                            write(",");
+                                            writeLine();
+                                        }
+                                        var e = entry.exportClause.elements[i_1];
+                                        write("\"");
+                                        emitNodeWithCommentsAndWithoutSourcemap(e.name);
+                                        write("\": " + parameterName + "[\"");
+                                        emitNodeWithCommentsAndWithoutSourcemap(e.propertyName || e.name);
+                                        write("\"]");
+                                    }
+                                    decreaseIndent();
+                                    writeLine();
+                                    write("});");
+                                }
+                                else {
+                                    writeLine();
+                                    write(exportStarFunction + "(" + parameterName + ");");
+                                }
+                                writeLine();
+                                break;
+                        }
+                    }
+                    decreaseIndent();
+                    write("}");
+                    decreaseIndent();
+                }
+                write("],");
+            }
+            function emitExecute(node, startIndex) {
+                write("execute: function() {");
+                increaseIndent();
+                writeLine();
+                for (var i = startIndex; i < node.statements.length; i++) {
+                    var statement = node.statements[i];
+                    switch (statement.kind) {
+                        case 220:
+                        case 230:
+                            continue;
+                        case 236:
+                            if (!statement.moduleSpecifier) {
+                                for (var _a = 0, _b = statement.exportClause.elements; _a < _b.length; _a++) {
+                                    var element = _b[_a];
+                                    emitExportSpecifierInSystemModule(element);
+                                }
+                            }
+                            continue;
+                        case 229:
+                            if (!ts.isInternalModuleImportEqualsDeclaration(statement)) {
+                                continue;
+                            }
+                        default:
+                            writeLine();
+                            emit(statement);
+                    }
+                }
+                decreaseIndent();
+                writeLine();
+                write("}");
+            }
+            function writeModuleName(node, emitRelativePathAsModuleName) {
+                var moduleName = node.moduleName;
+                if (moduleName || (emitRelativePathAsModuleName && (moduleName = getResolvedExternalModuleName(host, node)))) {
+                    write("\"" + moduleName + "\", ");
+                }
+            }
+            function emitSystemModule(node, emitRelativePathAsModuleName) {
+                collectExternalModuleInfo(node);
+                ts.Debug.assert(!exportFunctionForFile);
+                exportFunctionForFile = makeUniqueName("exports");
+                contextObjectForFile = makeUniqueName("context");
+                writeLine();
+                write("System.register(");
+                writeModuleName(node, emitRelativePathAsModuleName);
+                write("[");
+                var groupIndices = {};
+                var dependencyGroups = [];
+                for (var i = 0; i < externalImports.length; i++) {
+                    var text = getExternalModuleNameText(externalImports[i], emitRelativePathAsModuleName);
+                    if (text === undefined) {
+                        continue;
+                    }
+                    var key = text.substr(1, text.length - 2);
+                    if (ts.hasProperty(groupIndices, key)) {
+                        var groupIndex = groupIndices[key];
+                        dependencyGroups[groupIndex].push(externalImports[i]);
+                        continue;
+                    }
+                    else {
+                        groupIndices[key] = dependencyGroups.length;
+                        dependencyGroups.push([externalImports[i]]);
+                    }
+                    if (i !== 0) {
+                        write(", ");
+                    }
+                    write(text);
+                }
+                write("], function(" + exportFunctionForFile + ", " + contextObjectForFile + ") {");
+                writeLine();
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
+                writeLine();
+                write("var __moduleName = " + contextObjectForFile + " && " + contextObjectForFile + ".id;");
+                writeLine();
+                emitEmitHelpers(node);
+                emitCaptureThisForNodeIfNecessary(node);
+                emitSystemModuleBody(node, dependencyGroups, startIndex);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
+                var aliasedModuleNames = [];
+                var unaliasedModuleNames = [];
+                var importAliasNames = [];
+                for (var _a = 0, _b = node.amdDependencies; _a < _b.length; _a++) {
+                    var amdDependency = _b[_a];
+                    if (amdDependency.name) {
+                        aliasedModuleNames.push('"' + amdDependency.path + '"');
+                        importAliasNames.push(amdDependency.name);
+                    }
+                    else {
+                        unaliasedModuleNames.push('"' + amdDependency.path + '"');
+                    }
+                }
+                for (var _c = 0, externalImports_4 = externalImports; _c < externalImports_4.length; _c++) {
+                    var importNode = externalImports_4[_c];
+                    var externalModuleName = getExternalModuleNameText(importNode, emitRelativePathAsModuleName);
+                    var importAliasName = getLocalNameForExternalImport(importNode);
+                    if (includeNonAmdDependencies && importAliasName) {
+                        aliasedModuleNames.push(externalModuleName);
+                        importAliasNames.push(importAliasName);
+                    }
+                    else {
+                        unaliasedModuleNames.push(externalModuleName);
+                    }
+                }
+                return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
+            }
+            function emitAMDDependencies(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
+                var dependencyNames = getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName);
+                emitAMDDependencyList(dependencyNames);
+                write(", ");
+                emitAMDFactoryHeader(dependencyNames);
+            }
+            function emitAMDDependencyList(_a) {
+                var aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames;
+                write('["require", "exports"');
+                if (aliasedModuleNames.length) {
+                    write(", ");
+                    write(aliasedModuleNames.join(", "));
+                }
+                if (unaliasedModuleNames.length) {
+                    write(", ");
+                    write(unaliasedModuleNames.join(", "));
+                }
+                write("]");
+            }
+            function emitAMDFactoryHeader(_a) {
+                var importAliasNames = _a.importAliasNames;
+                write("function (require, exports");
+                if (importAliasNames.length) {
+                    write(", ");
+                    write(importAliasNames.join(", "));
+                }
+                write(") {");
+            }
+            function emitAMDModule(node, emitRelativePathAsModuleName) {
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                writeLine();
+                write("define(");
+                writeModuleName(node, emitRelativePathAsModuleName);
+                emitAMDDependencies(node, true, emitRelativePathAsModuleName);
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(true);
+                emitTempDeclarations(true);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function emitCommonJSModule(node) {
+                var startIndex = emitDirectivePrologues(node.statements, false, !compilerOptions.noImplicitUseStrict);
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(false);
+                emitTempDeclarations(true);
+            }
+            function emitUMDModule(node) {
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                var dependencyNames = getAMDDependencyNames(node, false);
+                writeLines("(function (factory) {\n    if (typeof module === 'object' && typeof module.exports === 'object') {\n        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n    }\n    else if (typeof define === 'function' && define.amd) {\n        define(");
+                emitAMDDependencyList(dependencyNames);
+                write(", factory);");
+                writeLines("    }\n})(");
+                emitAMDFactoryHeader(dependencyNames);
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(true);
+                emitTempDeclarations(true);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function emitES6Module(node) {
+                externalImports = undefined;
+                exportSpecifiers = undefined;
+                exportEquals = undefined;
+                hasExportStarsToExportValues = false;
+                var startIndex = emitDirectivePrologues(node.statements, false);
+                emitEmitHelpers(node);
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitTempDeclarations(true);
+            }
+            function emitExportEquals(emitAsReturn) {
+                if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) {
+                    writeLine();
+                    emitStart(exportEquals);
+                    write(emitAsReturn ? "return " : "module.exports = ");
+                    emit(exportEquals.expression);
+                    write(";");
+                    emitEnd(exportEquals);
+                }
+            }
+            function emitJsxElement(node) {
+                switch (compilerOptions.jsx) {
+                    case 2:
+                        jsxEmitReact(node);
+                        break;
+                    case 1:
+                    default:
+                        jsxEmitPreserve(node);
+                        break;
+                }
+            }
+            function trimReactWhitespaceAndApplyEntities(node) {
+                var result = undefined;
+                var text = ts.getTextOfNode(node, true);
+                var firstNonWhitespace = 0;
+                var lastNonWhitespace = -1;
+                for (var i = 0; i < text.length; i++) {
+                    var c = text.charCodeAt(i);
+                    if (ts.isLineBreak(c)) {
+                        if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) {
+                            var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1);
+                            result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
+                        }
+                        firstNonWhitespace = -1;
+                    }
+                    else if (!ts.isWhiteSpace(c)) {
+                        lastNonWhitespace = i;
+                        if (firstNonWhitespace === -1) {
+                            firstNonWhitespace = i;
+                        }
+                    }
+                }
+                if (firstNonWhitespace !== -1) {
+                    var part = text.substr(firstNonWhitespace);
+                    result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
+                }
+                if (result) {
+                    result = result.replace(/&(\w+);/g, function (s, m) {
+                        if (entities[m] !== undefined) {
+                            var ch = String.fromCharCode(entities[m]);
+                            return ch === '"' ? "\\\"" : ch;
+                        }
+                        else {
+                            return s;
+                        }
+                    });
+                }
+                return result;
+            }
+            function isJsxChildEmittable(child) {
+                if (child.kind === 248) {
+                    return !!child.expression;
+                }
+                else if (child.kind === 244) {
+                    return !!getTextToEmit(child);
+                }
+                return true;
+            }
+            ;
+            function getTextToEmit(node) {
+                switch (compilerOptions.jsx) {
+                    case 2:
+                        var text = trimReactWhitespaceAndApplyEntities(node);
+                        if (text === undefined || text.length === 0) {
+                            return undefined;
+                        }
+                        else {
+                            return text;
+                        }
+                    case 1:
+                    default:
+                        return ts.getTextOfNode(node, true);
+                }
+            }
+            function emitJsxText(node) {
+                switch (compilerOptions.jsx) {
+                    case 2:
+                        write('"');
+                        write(trimReactWhitespaceAndApplyEntities(node));
+                        write('"');
+                        break;
+                    case 1:
+                    default:
+                        writer.writeLiteral(ts.getTextOfNode(node, true));
+                        break;
+                }
+            }
+            function emitJsxExpression(node) {
+                if (node.expression) {
+                    switch (compilerOptions.jsx) {
+                        case 1:
+                        default:
+                            write("{");
+                            emit(node.expression);
+                            write("}");
+                            break;
+                        case 2:
+                            emit(node.expression);
+                            break;
+                    }
+                }
+            }
+            function isUseStrictPrologue(node) {
+                return node.expression.text === "use strict";
+            }
+            function ensureUseStrictPrologue(startWithNewLine, writeUseStrict) {
+                if (writeUseStrict) {
+                    if (startWithNewLine) {
+                        writeLine();
+                    }
+                    write("\"use strict\";");
+                }
+            }
+            function emitDirectivePrologues(statements, startWithNewLine, ensureUseStrict) {
+                var foundUseStrict = false;
+                for (var i = 0; i < statements.length; i++) {
+                    if (ts.isPrologueDirective(statements[i])) {
+                        if (isUseStrictPrologue(statements[i])) {
+                            foundUseStrict = true;
+                        }
+                        if (startWithNewLine || i > 0) {
+                            writeLine();
+                        }
+                        emit(statements[i]);
+                    }
+                    else {
+                        ensureUseStrictPrologue(startWithNewLine || i > 0, !foundUseStrict && ensureUseStrict);
+                        return i;
+                    }
+                }
+                ensureUseStrictPrologue(startWithNewLine, !foundUseStrict && ensureUseStrict);
+                return statements.length;
+            }
+            function writeLines(text) {
+                var lines = text.split(/\r\n|\r|\n/g);
+                for (var i = 0; i < lines.length; i++) {
+                    var line = lines[i];
+                    if (line.length) {
+                        writeLine();
+                        write(line);
+                    }
+                }
+            }
+            function emitEmitHelpers(node) {
+                if (!compilerOptions.noEmitHelpers) {
+                    if (languageVersion < 2 && !extendsEmitted && node.flags & 262144) {
+                        writeLines(extendsHelper);
+                        extendsEmitted = true;
+                    }
+                    if (compilerOptions.jsx !== 1 && !assignEmitted && (node.flags & 1073741824)) {
+                        writeLines(assignHelper);
+                        assignEmitted = true;
+                    }
+                    if (!decorateEmitted && node.flags & 524288) {
+                        writeLines(decorateHelper);
+                        if (compilerOptions.emitDecoratorMetadata) {
+                            writeLines(metadataHelper);
+                        }
+                        decorateEmitted = true;
+                    }
+                    if (!paramEmitted && node.flags & 1048576) {
+                        writeLines(paramHelper);
+                        paramEmitted = true;
+                    }
+                    if (!awaiterEmitted && node.flags & 2097152) {
+                        writeLines(awaiterHelper);
+                        awaiterEmitted = true;
+                    }
+                }
+            }
+            function emitSourceFileNode(node) {
+                writeLine();
+                emitShebang();
+                emitDetachedCommentsAndUpdateCommentsInfo(node);
+                if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
+                    if (isOwnFileEmit || (!ts.isExternalModule(node) && compilerOptions.isolatedModules)) {
+                        var emitModule = moduleEmitDelegates[modulekind] || moduleEmitDelegates[ts.ModuleKind.CommonJS];
+                        emitModule(node);
+                    }
+                    else {
+                        bundleEmitDelegates[modulekind](node, true);
+                    }
+                }
+                else {
+                    var startIndex = emitDirectivePrologues(node.statements, false);
+                    externalImports = undefined;
+                    exportSpecifiers = undefined;
+                    exportEquals = undefined;
+                    hasExportStarsToExportValues = false;
+                    emitEmitHelpers(node);
+                    emitCaptureThisForNodeIfNecessary(node);
+                    emitLinesStartingAt(node.statements, startIndex);
+                    emitTempDeclarations(true);
+                }
+                emitLeadingComments(node.endOfFileToken);
+            }
+            function emit(node) {
+                emitNodeConsideringCommentsOption(node, emitNodeWithSourceMap);
+            }
+            function emitNodeWithCommentsAndWithoutSourcemap(node) {
+                emitNodeConsideringCommentsOption(node, emitNodeWithoutSourceMap);
+            }
+            function emitNodeConsideringCommentsOption(node, emitNodeConsideringSourcemap) {
+                if (node) {
+                    if (node.flags & 2) {
+                        return emitCommentsOnNotEmittedNode(node);
+                    }
+                    if (isSpecializedCommentHandling(node)) {
+                        return emitNodeWithoutSourceMap(node);
+                    }
+                    var emitComments_1 = shouldEmitLeadingAndTrailingComments(node);
+                    if (emitComments_1) {
+                        emitLeadingComments(node);
+                    }
+                    emitNodeConsideringSourcemap(node);
+                    if (emitComments_1) {
+                        emitTrailingComments(node);
+                    }
+                }
+            }
+            function emitNodeWithSourceMap(node) {
+                if (node) {
+                    emitStart(node);
+                    emitNodeWithoutSourceMap(node);
+                    emitEnd(node);
+                }
+            }
+            function emitNodeWithoutSourceMap(node) {
+                if (node) {
+                    emitJavaScriptWorker(node);
+                }
+            }
+            function changeSourceMapEmit(writer) {
+                sourceMap = writer;
+                emitStart = writer.emitStart;
+                emitEnd = writer.emitEnd;
+                emitPos = writer.emitPos;
+                setSourceFile = writer.setSourceFile;
+            }
+            function withTemporaryNoSourceMap(callback) {
+                var prevSourceMap = sourceMap;
+                setSourceMapWriterEmit(ts.getNullSourceMapWriter());
+                callback();
+                setSourceMapWriterEmit(prevSourceMap);
+            }
+            function isSpecializedCommentHandling(node) {
+                switch (node.kind) {
+                    case 222:
+                    case 220:
+                    case 230:
+                    case 229:
+                    case 223:
+                    case 235:
+                        return true;
+                }
+            }
+            function shouldEmitLeadingAndTrailingComments(node) {
+                switch (node.kind) {
+                    case 200:
+                        return shouldEmitLeadingAndTrailingCommentsForVariableStatement(node);
+                    case 225:
+                        return shouldEmitModuleDeclaration(node);
+                    case 224:
+                        return shouldEmitEnumDeclaration(node);
+                }
+                ts.Debug.assert(!isSpecializedCommentHandling(node));
+                if (node.kind !== 199 &&
+                    node.parent &&
+                    node.parent.kind === 180 &&
+                    node.parent.body === node &&
+                    languageVersion <= 1) {
+                    return false;
+                }
+                return true;
+            }
+            function emitJavaScriptWorker(node) {
+                switch (node.kind) {
+                    case 69:
+                        return emitIdentifier(node);
+                    case 142:
+                        return emitParameter(node);
+                    case 147:
+                    case 146:
+                        return emitMethod(node);
+                    case 149:
+                    case 150:
+                        return emitAccessor(node);
+                    case 97:
+                        return emitThis(node);
+                    case 95:
+                        return emitSuper(node);
+                    case 93:
+                        return write("null");
+                    case 99:
+                        return write("true");
+                    case 84:
+                        return write("false");
+                    case 8:
+                    case 9:
+                    case 10:
+                    case 11:
+                    case 12:
+                    case 13:
+                    case 14:
+                        return emitLiteral(node);
+                    case 189:
+                        return emitTemplateExpression(node);
+                    case 197:
+                        return emitTemplateSpan(node);
+                    case 241:
+                    case 242:
+                        return emitJsxElement(node);
+                    case 244:
+                        return emitJsxText(node);
+                    case 248:
+                        return emitJsxExpression(node);
+                    case 139:
+                        return emitQualifiedName(node);
+                    case 167:
+                        return emitObjectBindingPattern(node);
+                    case 168:
+                        return emitArrayBindingPattern(node);
+                    case 169:
+                        return emitBindingElement(node);
+                    case 170:
+                        return emitArrayLiteral(node);
+                    case 171:
+                        return emitObjectLiteral(node);
+                    case 253:
+                        return emitPropertyAssignment(node);
+                    case 254:
+                        return emitShorthandPropertyAssignment(node);
+                    case 140:
+                        return emitComputedPropertyName(node);
+                    case 172:
+                        return emitPropertyAccess(node);
+                    case 173:
+                        return emitIndexedAccess(node);
+                    case 174:
+                        return emitCallExpression(node);
+                    case 175:
+                        return emitNewExpression(node);
+                    case 176:
+                        return emitTaggedTemplateExpression(node);
+                    case 177:
+                    case 195:
+                    case 196:
+                        return emit(node.expression);
+                    case 178:
+                        return emitParenExpression(node);
+                    case 220:
+                    case 179:
+                    case 180:
+                        return emitFunctionDeclaration(node);
+                    case 181:
+                        return emitDeleteExpression(node);
+                    case 182:
+                        return emitTypeOfExpression(node);
+                    case 183:
+                        return emitVoidExpression(node);
+                    case 184:
+                        return emitAwaitExpression(node);
+                    case 185:
+                        return emitPrefixUnaryExpression(node);
+                    case 186:
+                        return emitPostfixUnaryExpression(node);
+                    case 187:
+                        return emitBinaryExpression(node);
+                    case 188:
+                        return emitConditionalExpression(node);
+                    case 191:
+                        return emitSpreadElementExpression(node);
+                    case 190:
+                        return emitYieldExpression(node);
+                    case 193:
+                        return;
+                    case 199:
+                    case 226:
+                        return emitBlock(node);
+                    case 200:
+                        return emitVariableStatement(node);
+                    case 201:
+                        return write(";");
+                    case 202:
+                        return emitExpressionStatement(node);
+                    case 203:
+                        return emitIfStatement(node);
+                    case 204:
+                        return emitDoStatement(node);
+                    case 205:
+                        return emitWhileStatement(node);
+                    case 206:
+                        return emitForStatement(node);
+                    case 208:
+                    case 207:
+                        return emitForInOrForOfStatement(node);
+                    case 209:
+                    case 210:
+                        return emitBreakOrContinueStatement(node);
+                    case 211:
+                        return emitReturnStatement(node);
+                    case 212:
+                        return emitWithStatement(node);
+                    case 213:
+                        return emitSwitchStatement(node);
+                    case 249:
+                    case 250:
+                        return emitCaseOrDefaultClause(node);
+                    case 214:
+                        return emitLabeledStatement(node);
+                    case 215:
+                        return emitThrowStatement(node);
+                    case 216:
+                        return emitTryStatement(node);
+                    case 252:
+                        return emitCatchClause(node);
+                    case 217:
+                        return emitDebuggerStatement(node);
+                    case 218:
+                        return emitVariableDeclaration(node);
+                    case 192:
+                        return emitClassExpression(node);
+                    case 221:
+                        return emitClassDeclaration(node);
+                    case 222:
+                        return emitInterfaceDeclaration(node);
+                    case 224:
+                        return emitEnumDeclaration(node);
+                    case 255:
+                        return emitEnumMember(node);
+                    case 225:
+                        return emitModuleDeclaration(node);
+                    case 230:
+                        return emitImportDeclaration(node);
+                    case 229:
+                        return emitImportEqualsDeclaration(node);
+                    case 236:
+                        return emitExportDeclaration(node);
+                    case 235:
+                        return emitExportAssignment(node);
+                    case 256:
+                        return emitSourceFileNode(node);
+                }
+            }
+            function hasDetachedComments(pos) {
+                return detachedCommentsInfo !== undefined && ts.lastOrUndefined(detachedCommentsInfo).nodePos === pos;
+            }
+            function getLeadingCommentsWithoutDetachedComments() {
+                var leadingComments = ts.getLeadingCommentRanges(currentText, ts.lastOrUndefined(detachedCommentsInfo).detachedCommentEndPos);
+                if (detachedCommentsInfo.length - 1) {
+                    detachedCommentsInfo.pop();
+                }
+                else {
+                    detachedCommentsInfo = undefined;
+                }
+                return leadingComments;
+            }
+            function isTripleSlashComment(comment) {
+                if (currentText.charCodeAt(comment.pos + 1) === 47 &&
+                    comment.pos + 2 < comment.end &&
+                    currentText.charCodeAt(comment.pos + 2) === 47) {
+                    var textSubStr = currentText.substring(comment.pos, comment.end);
+                    return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) ||
+                        textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ?
+                        true : false;
+                }
+                return false;
+            }
+            function getLeadingCommentsToEmit(node) {
+                if (node.parent) {
+                    if (node.parent.kind === 256 || node.pos !== node.parent.pos) {
+                        if (hasDetachedComments(node.pos)) {
+                            return getLeadingCommentsWithoutDetachedComments();
+                        }
+                        else {
+                            return ts.getLeadingCommentRangesOfNodeFromText(node, currentText);
+                        }
+                    }
+                }
+            }
+            function getTrailingCommentsToEmit(node) {
+                if (node.parent) {
+                    if (node.parent.kind === 256 || node.end !== node.parent.end) {
+                        return ts.getTrailingCommentRanges(currentText, node.end);
+                    }
+                }
+            }
+            function emitCommentsOnNotEmittedNode(node) {
+                emitLeadingCommentsWorker(node, false);
+            }
+            function emitLeadingComments(node) {
+                return emitLeadingCommentsWorker(node, true);
+            }
+            function emitLeadingCommentsWorker(node, isEmittedNode) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var leadingComments;
+                if (isEmittedNode) {
+                    leadingComments = getLeadingCommentsToEmit(node);
+                }
+                else {
+                    if (node.pos === 0) {
+                        leadingComments = ts.filter(getLeadingCommentsToEmit(node), isTripleSlashComment);
+                    }
+                }
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, node, leadingComments);
+                ts.emitComments(currentText, currentLineMap, writer, leadingComments, true, newLine, writeComment);
+            }
+            function emitTrailingComments(node) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var trailingComments = getTrailingCommentsToEmit(node);
+                ts.emitComments(currentText, currentLineMap, writer, trailingComments, false, newLine, writeComment);
+            }
+            function emitTrailingCommentsOfPosition(pos) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var trailingComments = ts.getTrailingCommentRanges(currentText, pos);
+                ts.emitComments(currentText, currentLineMap, writer, trailingComments, true, newLine, writeComment);
+            }
+            function emitLeadingCommentsOfPositionWorker(pos) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var leadingComments;
+                if (hasDetachedComments(pos)) {
+                    leadingComments = getLeadingCommentsWithoutDetachedComments();
+                }
+                else {
+                    leadingComments = ts.getLeadingCommentRanges(currentText, pos);
+                }
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, { pos: pos, end: pos }, leadingComments);
+                ts.emitComments(currentText, currentLineMap, writer, leadingComments, true, newLine, writeComment);
+            }
+            function emitDetachedCommentsAndUpdateCommentsInfo(node) {
+                var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, node, newLine, compilerOptions.removeComments);
+                if (currentDetachedCommentInfo) {
+                    if (detachedCommentsInfo) {
+                        detachedCommentsInfo.push(currentDetachedCommentInfo);
+                    }
+                    else {
+                        detachedCommentsInfo = [currentDetachedCommentInfo];
+                    }
+                }
+            }
+            function writeComment(text, lineMap, writer, comment, newLine) {
+                emitPos(comment.pos);
+                ts.writeCommentRange(text, lineMap, writer, comment, newLine);
+                emitPos(comment.end);
+            }
+            function emitShebang() {
+                var shebang = ts.getShebang(currentText);
+                if (shebang) {
+                    write(shebang);
+                    writeLine();
+                }
+            }
+            var _a, _b;
+        }
+        function emitFile(_a, sourceFiles, isBundledEmit) {
+            var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath;
+            if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
+                emitJavaScript(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
+            }
+            else {
+                emitSkipped = true;
+            }
+            if (declarationFilePath) {
+                emitSkipped = ts.writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) || emitSkipped;
+            }
+            if (!emitSkipped && emittedFilesList) {
+                emittedFilesList.push(jsFilePath);
+                if (sourceMapFilePath) {
+                    emittedFilesList.push(sourceMapFilePath);
+                }
+                if (declarationFilePath) {
+                    emittedFilesList.push(declarationFilePath);
+                }
+            }
+        }
+    }
+    ts.emitFiles = emitFiles;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.programTime = 0;
+    ts.emitTime = 0;
+    ts.ioReadTime = 0;
+    ts.ioWriteTime = 0;
+    var emptyArray = [];
+    var defaultLibrarySearchPaths = [
+        "types/",
+        "node_modules/",
+        "node_modules/@types/",
+    ];
+    ts.version = "1.9.0";
+    function findConfigFile(searchPath, fileExists) {
+        while (true) {
+            var fileName = ts.combinePaths(searchPath, "tsconfig.json");
+            if (fileExists(fileName)) {
+                return fileName;
+            }
+            var parentPath = ts.getDirectoryPath(searchPath);
+            if (parentPath === searchPath) {
+                break;
+            }
+            searchPath = parentPath;
+        }
+        return undefined;
+    }
+    ts.findConfigFile = findConfigFile;
+    function resolveTripleslashReference(moduleName, containingFile) {
+        var basePath = ts.getDirectoryPath(containingFile);
+        var referencedFileName = ts.isRootedDiskPath(moduleName) ? moduleName : ts.combinePaths(basePath, moduleName);
+        return ts.normalizePath(referencedFileName);
+    }
+    ts.resolveTripleslashReference = resolveTripleslashReference;
+    function computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName) {
+        var commonPathComponents;
+        var failed = ts.forEach(fileNames, function (sourceFile) {
+            var sourcePathComponents = ts.getNormalizedPathComponents(sourceFile, currentDirectory);
+            sourcePathComponents.pop();
+            if (!commonPathComponents) {
+                commonPathComponents = sourcePathComponents;
+                return;
+            }
+            for (var i = 0, n = Math.min(commonPathComponents.length, sourcePathComponents.length); i < n; i++) {
+                if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
+                    if (i === 0) {
+                        return true;
+                    }
+                    commonPathComponents.length = i;
+                    break;
+                }
+            }
+            if (sourcePathComponents.length < commonPathComponents.length) {
+                commonPathComponents.length = sourcePathComponents.length;
+            }
+        });
+        if (failed) {
+            return "";
+        }
+        if (!commonPathComponents) {
+            return currentDirectory;
+        }
+        return ts.getNormalizedPathFromPathComponents(commonPathComponents);
+    }
+    ts.computeCommonSourceDirectoryOfFilenames = computeCommonSourceDirectoryOfFilenames;
+    function trace(host, message) {
+        host.trace(ts.formatMessage.apply(undefined, arguments));
+    }
+    function isTraceEnabled(compilerOptions, host) {
+        return compilerOptions.traceResolution && host.trace !== undefined;
+    }
+    function hasZeroOrOneAsteriskCharacter(str) {
+        var seenAsterisk = false;
+        for (var i = 0; i < str.length; i++) {
+            if (str.charCodeAt(i) === 42) {
+                if (!seenAsterisk) {
+                    seenAsterisk = true;
+                }
+                else {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+    ts.hasZeroOrOneAsteriskCharacter = hasZeroOrOneAsteriskCharacter;
+    function createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations) {
+        return { resolvedModule: resolvedFileName ? { resolvedFileName: resolvedFileName, isExternalLibraryImport: isExternalLibraryImport } : undefined, failedLookupLocations: failedLookupLocations };
+    }
+    function moduleHasNonRelativeName(moduleName) {
+        if (ts.isRootedDiskPath(moduleName)) {
+            return false;
+        }
+        var i = moduleName.lastIndexOf("./", 1);
+        var startsWithDotSlashOrDotDotSlash = i === 0 || (i === 1 && moduleName.charCodeAt(0) === 46);
+        return !startsWithDotSlashOrDotDotSlash;
+    }
+    function tryReadTypesSection(packageJsonPath, baseDirectory, state) {
+        var jsonContent;
+        try {
+            var jsonText = state.host.readFile(packageJsonPath);
+            jsonContent = jsonText ? JSON.parse(jsonText) : {};
+        }
+        catch (e) {
+            jsonContent = {};
+        }
+        var typesFile;
+        var fieldName;
+        if (jsonContent.typings) {
+            if (typeof jsonContent.typings === "string") {
+                fieldName = "typings";
+                typesFile = jsonContent.typings;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "typings", typeof jsonContent.typings);
+                }
+            }
+        }
+        if (!typesFile && jsonContent.types) {
+            if (typeof jsonContent.types === "string") {
+                fieldName = "types";
+                typesFile = jsonContent.types;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "types", typeof jsonContent.types);
+                }
+            }
+        }
+        if (typesFile) {
+            var typesFilePath = ts.normalizePath(ts.combinePaths(baseDirectory, typesFile));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, typesFile, typesFilePath);
+            }
+            return typesFilePath;
+        }
+        return undefined;
+    }
+    var typeReferenceExtensions = [".d.ts"];
+    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
+        var traceEnabled = isTraceEnabled(options, host);
+        var moduleResolutionState = {
+            compilerOptions: options,
+            host: host,
+            skipTsx: true,
+            traceEnabled: traceEnabled
+        };
+        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
+        if (traceEnabled) {
+            if (containingFile === undefined) {
+                if (rootDir === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, rootDir);
+                }
+            }
+            else {
+                if (rootDir === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, rootDir);
+                }
+            }
+        }
+        var failedLookupLocations = [];
+        if (rootDir !== undefined) {
+            var effectivePrimarySearchPaths = options.typesSearchPaths || defaultLibrarySearchPaths;
+            for (var _i = 0, effectivePrimarySearchPaths_1 = effectivePrimarySearchPaths; _i < effectivePrimarySearchPaths_1.length; _i++) {
+                var searchPath = effectivePrimarySearchPaths_1[_i];
+                var primaryPath = ts.combinePaths(rootDir, searchPath);
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, primaryPath);
+                }
+                var candidate = ts.combinePaths(primaryPath, typeReferenceDirectiveName);
+                var candidateDirectory = ts.getDirectoryPath(candidate);
+                var resolvedFile_1 = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations, !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
+                if (resolvedFile_1) {
+                    if (traceEnabled) {
+                        trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile_1, true);
+                    }
+                    return {
+                        resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile_1 },
+                        failedLookupLocations: failedLookupLocations
+                    };
+                }
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
+            }
+        }
+        var resolvedFile;
+        var initialLocationForSecondaryLookup;
+        if (containingFile) {
+            initialLocationForSecondaryLookup = ts.getDirectoryPath(containingFile);
+        }
+        else {
+            initialLocationForSecondaryLookup = rootDir;
+        }
+        if (initialLocationForSecondaryLookup !== undefined) {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
+            }
+            resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState);
+            if (traceEnabled) {
+                if (resolvedFile) {
+                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
+                }
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
+            }
+        }
+        return {
+            resolvedTypeReferenceDirective: resolvedFile
+                ? { primary: false, resolvedFileName: resolvedFile }
+                : undefined,
+            failedLookupLocations: failedLookupLocations
+        };
+    }
+    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
+    function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        if (traceEnabled) {
+            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
+        }
+        var moduleResolution = compilerOptions.moduleResolution;
+        if (moduleResolution === undefined) {
+            moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
+            }
+        }
+        var result;
+        switch (moduleResolution) {
+            case ts.ModuleResolutionKind.NodeJs:
+                result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
+                break;
+            case ts.ModuleResolutionKind.Classic:
+                result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
+                break;
+        }
+        if (traceEnabled) {
+            if (result.resolvedModule) {
+                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
+            }
+            else {
+                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
+            }
+        }
+        return result;
+    }
+    ts.resolveModuleName = resolveModuleName;
+    function tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
+        if (moduleHasNonRelativeName(moduleName)) {
+            return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
+        }
+        else {
+            return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
+        }
+    }
+    function tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
+        if (!state.compilerOptions.rootDirs) {
+            return undefined;
+        }
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
+        }
+        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+        var matchedRootDir;
+        var matchedNormalizedPrefix;
+        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
+            var rootDir = _a[_i];
+            var normalizedRoot = ts.normalizePath(rootDir);
+            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
+                normalizedRoot += ts.directorySeparator;
+            }
+            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
+                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
+            }
+            if (isLongestMatchingPrefix) {
+                matchedNormalizedPrefix = normalizedRoot;
+                matchedRootDir = rootDir;
+            }
+        }
+        if (matchedNormalizedPrefix) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
+            }
+            var suffix = candidate.substr(matchedNormalizedPrefix.length);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
+            }
+            var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
+            if (resolvedFileName) {
+                return resolvedFileName;
+            }
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
+            }
+            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
+                var rootDir = _c[_b];
+                if (rootDir === matchedRootDir) {
+                    continue;
+                }
+                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
+                }
+                var baseDirectory = ts.getDirectoryPath(candidate_1);
+                var resolvedFileName_1 = loader(candidate_1, supportedExtensions, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
+                if (resolvedFileName_1) {
+                    return resolvedFileName_1;
+                }
+            }
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
+            }
+        }
+        return undefined;
+    }
+    function tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state) {
+        if (!state.compilerOptions.baseUrl) {
+            return undefined;
+        }
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
+        }
+        var matchedPattern = undefined;
+        if (state.compilerOptions.paths) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
+            }
+            matchedPattern = matchPatternOrExact(ts.getKeys(state.compilerOptions.paths), moduleName);
+        }
+        if (matchedPattern) {
+            var matchedStar = typeof matchedPattern === "string" ? undefined : matchedText(matchedPattern, moduleName);
+            var matchedPatternText = typeof matchedPattern === "string" ? matchedPattern : patternText(matchedPattern);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPatternText);
+            }
+            for (var _i = 0, _a = state.compilerOptions.paths[matchedPatternText]; _i < _a.length; _i++) {
+                var subst = _a[_i];
+                var path = matchedStar ? subst.replace("*", matchedStar) : subst;
+                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
+                }
+                var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+                if (resolvedFileName) {
+                    return resolvedFileName;
+                }
+            }
+            return undefined;
+        }
+        else {
+            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
+            }
+            return loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+        }
+    }
+    function matchPatternOrExact(patternStrings, candidate) {
+        var patterns = [];
+        for (var _i = 0, patternStrings_1 = patternStrings; _i < patternStrings_1.length; _i++) {
+            var patternString = patternStrings_1[_i];
+            var pattern = tryParsePattern(patternString);
+            if (pattern) {
+                patterns.push(pattern);
+            }
+            else if (patternString === candidate) {
+                return patternString;
+            }
+        }
+        return findBestPatternMatch(patterns, function (_) { return _; }, candidate);
+    }
+    function patternText(_a) {
+        var prefix = _a.prefix, suffix = _a.suffix;
+        return prefix + "*" + suffix;
+    }
+    function matchedText(pattern, candidate) {
+        ts.Debug.assert(isPatternMatch(pattern, candidate));
+        return candidate.substr(pattern.prefix.length, candidate.length - pattern.suffix.length);
+    }
+    function findBestPatternMatch(values, getPattern, candidate) {
+        var matchedValue = undefined;
+        var longestMatchPrefixLength = -1;
+        for (var _i = 0, values_1 = values; _i < values_1.length; _i++) {
+            var v = values_1[_i];
+            var pattern = getPattern(v);
+            if (isPatternMatch(pattern, candidate) && pattern.prefix.length > longestMatchPrefixLength) {
+                longestMatchPrefixLength = pattern.prefix.length;
+                matchedValue = v;
+            }
+        }
+        return matchedValue;
+    }
+    ts.findBestPatternMatch = findBestPatternMatch;
+    function isPatternMatch(_a, candidate) {
+        var prefix = _a.prefix, suffix = _a.suffix;
+        return candidate.length >= prefix.length + suffix.length &&
+            ts.startsWith(candidate, prefix) &&
+            ts.endsWith(candidate, suffix);
+    }
+    function tryParsePattern(pattern) {
+        ts.Debug.assert(hasZeroOrOneAsteriskCharacter(pattern));
+        var indexOfStar = pattern.indexOf("*");
+        return indexOfStar === -1 ? undefined : {
+            prefix: pattern.substr(0, indexOfStar),
+            suffix: pattern.substr(indexOfStar + 1)
+        };
+    }
+    ts.tryParsePattern = tryParsePattern;
+    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host) {
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var failedLookupLocations = [];
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: false };
+        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName, failedLookupLocations, supportedExtensions, state);
+        var isExternalLibraryImport = false;
+        if (!resolvedFileName) {
+            if (moduleHasNonRelativeName(moduleName)) {
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
+                }
+                resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state);
+                isExternalLibraryImport = resolvedFileName !== undefined;
+            }
+            else {
+                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, false, state);
+            }
+        }
+        if (resolvedFileName && host.realpath) {
+            var originalFileName = resolvedFileName;
+            resolvedFileName = ts.normalizePath(host.realpath(resolvedFileName));
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
+            }
+        }
+        return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
+    }
+    ts.nodeModuleNameResolver = nodeModuleNameResolver;
+    function nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state) {
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
+        }
+        var resolvedFileName = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
+        return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
+    }
+    function directoryProbablyExists(directoryName, host) {
+        return !host.directoryExists || host.directoryExists(directoryName);
+    }
+    ts.directoryProbablyExists = directoryProbablyExists;
+    function loadModuleFromFile(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
+        var resolvedByAddingOrKeepingExtension = loadModuleFromFileWorker(candidate, extensions, failedLookupLocation, onlyRecordFailures, state);
+        if (resolvedByAddingOrKeepingExtension) {
+            return resolvedByAddingOrKeepingExtension;
+        }
+        if (ts.hasJavaScriptFileExtension(candidate)) {
+            var extensionless = ts.removeFileExtension(candidate);
+            if (state.traceEnabled) {
+                var extension = candidate.substring(extensionless.length);
+                trace(state.host, ts.Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
+            }
+            return loadModuleFromFileWorker(extensionless, extensions, failedLookupLocation, onlyRecordFailures, state);
+        }
+    }
+    function loadModuleFromFileWorker(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
+        if (!onlyRecordFailures) {
+            var directory = ts.getDirectoryPath(candidate);
+            if (directory) {
+                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
+            }
+        }
+        return ts.forEach(extensions, tryLoad);
+        function tryLoad(ext) {
+            if (state.skipTsx && ts.isJsxOrTsxExtension(ext)) {
+                return undefined;
+            }
+            var fileName = ts.fileExtensionIs(candidate, ext) ? candidate : candidate + ext;
+            if (!onlyRecordFailures && state.host.fileExists(fileName)) {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
+                }
+                return fileName;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
+                }
+                failedLookupLocation.push(fileName);
+                return undefined;
+            }
+        }
+    }
+    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocation, onlyRecordFailures, state) {
+        var packageJsonPath = ts.combinePaths(candidate, "package.json");
+        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
+        if (directoryExists && state.host.fileExists(packageJsonPath)) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
+            }
+            var typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
+            if (typesFile) {
+                var result = loadModuleFromFile(typesFile, extensions, failedLookupLocation, !directoryProbablyExists(ts.getDirectoryPath(typesFile), state.host), state);
+                if (result) {
+                    return result;
+                }
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.package_json_does_not_have_types_field);
+                }
+            }
+        }
+        else {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
+            }
+            failedLookupLocation.push(packageJsonPath);
+        }
+        return loadModuleFromFile(ts.combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
+    }
+    function loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) {
+        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
+        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
+        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
+        var result = loadModuleFromFile(candidate, ts.supportedTypeScriptExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
+        if (result) {
+            return result;
+        }
+        result = loadNodeModuleFromDirectory(ts.supportedTypeScriptExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
+        if (result) {
+            return result;
+        }
+    }
+    function loadModuleFromNodeModules(moduleName, directory, failedLookupLocations, state) {
+        directory = ts.normalizeSlashes(directory);
+        while (true) {
+            var baseName = ts.getBaseFileName(directory);
+            if (baseName !== "node_modules") {
+                var result = loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) ||
+                    loadModuleFromNodeModulesFolder(ts.combinePaths("@types", moduleName), directory, failedLookupLocations, state);
+                if (result) {
+                    return result;
+                }
+            }
+            var parentPath = ts.getDirectoryPath(directory);
+            if (parentPath === directory) {
+                break;
+            }
+            directory = parentPath;
+        }
+        return undefined;
+    }
+    function classicNameResolver(moduleName, containingFile, compilerOptions, host) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: !compilerOptions.jsx };
+        var failedLookupLocations = [];
+        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
+        if (resolvedFileName) {
+            return createResolvedModule(resolvedFileName, false, failedLookupLocations);
+        }
+        var referencedSourceFile;
+        if (moduleHasNonRelativeName(moduleName)) {
+            while (true) {
+                var searchName = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, false, state);
+                if (referencedSourceFile) {
+                    break;
+                }
+                var parentPath = ts.getDirectoryPath(containingDirectory);
+                if (parentPath === containingDirectory) {
+                    break;
+                }
+                containingDirectory = parentPath;
+            }
+        }
+        else {
+            var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+            referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, false, state);
+        }
+        return referencedSourceFile
+            ? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations: failedLookupLocations }
+            : { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
+    }
+    ts.classicNameResolver = classicNameResolver;
+    ts.defaultInitCompilerOptions = {
+        module: ts.ModuleKind.CommonJS,
+        target: 1,
+        noImplicitAny: false,
+        sourceMap: false
+    };
+    function createCompilerHost(options, setParentNodes) {
+        var existingDirectories = {};
+        function getCanonicalFileName(fileName) {
+            return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
+        }
+        var unsupportedFileEncodingErrorCode = -2147024809;
+        function getSourceFile(fileName, languageVersion, onError) {
+            var text;
+            try {
+                var start = new Date().getTime();
+                text = ts.sys.readFile(fileName, options.charset);
+                ts.ioReadTime += new Date().getTime() - start;
+            }
+            catch (e) {
+                if (onError) {
+                    onError(e.number === unsupportedFileEncodingErrorCode
+                        ? ts.createCompilerDiagnostic(ts.Diagnostics.Unsupported_file_encoding).messageText
+                        : e.message);
+                }
+                text = "";
+            }
+            return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
+        }
+        function directoryExists(directoryPath) {
+            if (ts.hasProperty(existingDirectories, directoryPath)) {
+                return true;
+            }
+            if (ts.sys.directoryExists(directoryPath)) {
+                existingDirectories[directoryPath] = true;
+                return true;
+            }
+            return false;
+        }
+        function ensureDirectoriesExist(directoryPath) {
+            if (directoryPath.length > ts.getRootLength(directoryPath) && !directoryExists(directoryPath)) {
+                var parentDirectory = ts.getDirectoryPath(directoryPath);
+                ensureDirectoriesExist(parentDirectory);
+                ts.sys.createDirectory(directoryPath);
+            }
+        }
+        var outputFingerprints;
+        function writeFileIfUpdated(fileName, data, writeByteOrderMark) {
+            if (!outputFingerprints) {
+                outputFingerprints = {};
+            }
+            var hash = ts.sys.createHash(data);
+            var mtimeBefore = ts.sys.getModifiedTime(fileName);
+            if (mtimeBefore && ts.hasProperty(outputFingerprints, fileName)) {
+                var fingerprint = outputFingerprints[fileName];
+                if (fingerprint.byteOrderMark === writeByteOrderMark &&
+                    fingerprint.hash === hash &&
+                    fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
+                    return;
+                }
+            }
+            ts.sys.writeFile(fileName, data, writeByteOrderMark);
+            var mtimeAfter = ts.sys.getModifiedTime(fileName);
+            outputFingerprints[fileName] = {
+                hash: hash,
+                byteOrderMark: writeByteOrderMark,
+                mtime: mtimeAfter
+            };
+        }
+        function writeFile(fileName, data, writeByteOrderMark, onError) {
+            try {
+                var start = new Date().getTime();
+                ensureDirectoriesExist(ts.getDirectoryPath(ts.normalizePath(fileName)));
+                if (ts.isWatchSet(options) && ts.sys.createHash && ts.sys.getModifiedTime) {
+                    writeFileIfUpdated(fileName, data, writeByteOrderMark);
+                }
+                else {
+                    ts.sys.writeFile(fileName, data, writeByteOrderMark);
+                }
+                ts.ioWriteTime += new Date().getTime() - start;
+            }
+            catch (e) {
+                if (onError) {
+                    onError(e.message);
+                }
+            }
+        }
+        function getDefaultTypeDirectiveNames(rootPath) {
+            var localTypes = ts.combinePaths(rootPath, "types");
+            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
+            var result = [];
+            if (ts.sys.directoryExists(localTypes)) {
+                result = result.concat(ts.sys.getDirectories(localTypes));
+            }
+            if (ts.sys.directoryExists(npmTypes)) {
+                result = result.concat(ts.sys.getDirectories(npmTypes));
+            }
+            return result;
+        }
+        function getDefaultLibLocation() {
+            return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
+        }
+        var newLine = ts.getNewLineCharacter(options);
+        var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
+        return {
+            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
+            getSourceFile: getSourceFile,
+            getDefaultLibLocation: getDefaultLibLocation,
+            getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
+            writeFile: writeFile,
+            getCurrentDirectory: ts.memoize(function () { return ts.sys.getCurrentDirectory(); }),
+            useCaseSensitiveFileNames: function () { return ts.sys.useCaseSensitiveFileNames; },
+            getCanonicalFileName: getCanonicalFileName,
+            getNewLine: function () { return newLine; },
+            fileExists: function (fileName) { return ts.sys.fileExists(fileName); },
+            readFile: function (fileName) { return ts.sys.readFile(fileName); },
+            trace: function (s) { return ts.sys.write(s + newLine); },
+            directoryExists: function (directoryName) { return ts.sys.directoryExists(directoryName); },
+            realpath: realpath
+        };
+    }
+    ts.createCompilerHost = createCompilerHost;
+    function getPreEmitDiagnostics(program, sourceFile, cancellationToken) {
+        var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
+        if (program.getCompilerOptions().declaration) {
+            diagnostics = diagnostics.concat(program.getDeclarationDiagnostics(sourceFile, cancellationToken));
+        }
+        return ts.sortAndDeduplicateDiagnostics(diagnostics);
+    }
+    ts.getPreEmitDiagnostics = getPreEmitDiagnostics;
+    function flattenDiagnosticMessageText(messageText, newLine) {
+        if (typeof messageText === "string") {
+            return messageText;
+        }
+        else {
+            var diagnosticChain = messageText;
+            var result = "";
+            var indent = 0;
+            while (diagnosticChain) {
+                if (indent) {
+                    result += newLine;
+                    for (var i = 0; i < indent; i++) {
+                        result += "  ";
+                    }
+                }
+                result += diagnosticChain.messageText;
+                indent++;
+                diagnosticChain = diagnosticChain.next;
+            }
+            return result;
+        }
+    }
+    ts.flattenDiagnosticMessageText = flattenDiagnosticMessageText;
+    function loadWithLocalCache(names, containingFile, loader) {
+        if (names.length === 0) {
+            return [];
+        }
+        var resolutions = [];
+        var cache = {};
+        for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
+            var name_34 = names_1[_i];
+            var result = void 0;
+            if (ts.hasProperty(cache, name_34)) {
+                result = cache[name_34];
+            }
+            else {
+                result = loader(name_34, containingFile);
+                cache[name_34] = result;
+            }
+            resolutions.push(result);
+        }
+        return resolutions;
+    }
+    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
+        if (options.types) {
+            return options.types;
+        }
+        if (host && host.getDefaultTypeDirectiveNames) {
+            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
+            if (commonRoot) {
+                return host.getDefaultTypeDirectiveNames(commonRoot);
+            }
+        }
+        return undefined;
+    }
+    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
+    function createProgram(rootNames, options, host, oldProgram) {
+        var program;
+        var files = [];
+        var commonSourceDirectory;
+        var diagnosticsProducingTypeChecker;
+        var noDiagnosticsTypeChecker;
+        var classifiableNames;
+        var resolvedTypeReferenceDirectives = {};
+        var fileProcessingDiagnostics = ts.createDiagnosticCollection();
+        var start = new Date().getTime();
+        host = host || createCompilerHost(options);
+        var skipDefaultLib = options.noLib;
+        var programDiagnostics = ts.createDiagnosticCollection();
+        var currentDirectory = host.getCurrentDirectory();
+        var supportedExtensions = ts.getSupportedExtensions(options);
+        var hasEmitBlockingDiagnostics = ts.createFileMap(getCanonicalFileName);
+        var resolveModuleNamesWorker;
+        if (host.resolveModuleNames) {
+            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
+        }
+        else {
+            var loader_1 = function (moduleName, containingFile) { return resolveModuleName(moduleName, containingFile, options, host).resolvedModule; };
+            resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(moduleNames, containingFile, loader_1); };
+        }
+        var resolveTypeReferenceDirectiveNamesWorker;
+        if (host.resolveTypeReferenceDirectives) {
+            resolveTypeReferenceDirectiveNamesWorker = function (typeDirectiveNames, containingFile) { return host.resolveTypeReferenceDirectives(typeDirectiveNames, containingFile); };
+        }
+        else {
+            var loader_2 = function (typesRef, containingFile) { return resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective; };
+            resolveTypeReferenceDirectiveNamesWorker = function (typeReferenceDirectiveNames, containingFile) { return loadWithLocalCache(typeReferenceDirectiveNames, containingFile, loader_2); };
+        }
+        var filesByName = ts.createFileMap();
+        var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
+        if (!tryReuseStructureFromOldProgram()) {
+            ts.forEach(rootNames, function (name) { return processRootFile(name, false); });
+            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
+            if (typeReferences) {
+                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, undefined);
+                for (var i = 0; i < typeReferences.length; i++) {
+                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
+                }
+            }
+            if (!skipDefaultLib) {
+                if (!options.lib) {
+                    processRootFile(host.getDefaultLibFileName(options), true);
+                }
+                else {
+                    var libDirectory_1 = host.getDefaultLibLocation ? host.getDefaultLibLocation() : ts.getDirectoryPath(host.getDefaultLibFileName(options));
+                    ts.forEach(options.lib, function (libFileName) {
+                        processRootFile(ts.combinePaths(libDirectory_1, libFileName), true);
+                    });
+                }
+            }
+        }
+        oldProgram = undefined;
+        program = {
+            getRootFileNames: function () { return rootNames; },
+            getSourceFile: getSourceFile,
+            getSourceFileByPath: getSourceFileByPath,
+            getSourceFiles: function () { return files; },
+            getCompilerOptions: function () { return options; },
+            getSyntacticDiagnostics: getSyntacticDiagnostics,
+            getOptionsDiagnostics: getOptionsDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getSemanticDiagnostics: getSemanticDiagnostics,
+            getDeclarationDiagnostics: getDeclarationDiagnostics,
+            getTypeChecker: getTypeChecker,
+            getClassifiableNames: getClassifiableNames,
+            getDiagnosticsProducingTypeChecker: getDiagnosticsProducingTypeChecker,
+            getCommonSourceDirectory: getCommonSourceDirectory,
+            emit: emit,
+            getCurrentDirectory: function () { return currentDirectory; },
+            getNodeCount: function () { return getDiagnosticsProducingTypeChecker().getNodeCount(); },
+            getIdentifierCount: function () { return getDiagnosticsProducingTypeChecker().getIdentifierCount(); },
+            getSymbolCount: function () { return getDiagnosticsProducingTypeChecker().getSymbolCount(); },
+            getTypeCount: function () { return getDiagnosticsProducingTypeChecker().getTypeCount(); },
+            getFileProcessingDiagnostics: function () { return fileProcessingDiagnostics; },
+            getResolvedTypeReferenceDirectives: function () { return resolvedTypeReferenceDirectives; }
+        };
+        verifyCompilerOptions();
+        ts.programTime += new Date().getTime() - start;
+        return program;
+        function getCommonSourceDirectory() {
+            if (typeof commonSourceDirectory === "undefined") {
+                if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
+                    commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
+                }
+                else {
+                    commonSourceDirectory = computeCommonSourceDirectory(files);
+                }
+                if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
+                    commonSourceDirectory += ts.directorySeparator;
+                }
+            }
+            return commonSourceDirectory;
+        }
+        function getClassifiableNames() {
+            if (!classifiableNames) {
+                getTypeChecker();
+                classifiableNames = {};
+                for (var _i = 0, files_3 = files; _i < files_3.length; _i++) {
+                    var sourceFile = files_3[_i];
+                    ts.copyMap(sourceFile.classifiableNames, classifiableNames);
+                }
+            }
+            return classifiableNames;
+        }
+        function tryReuseStructureFromOldProgram() {
+            if (!oldProgram) {
+                return false;
+            }
+            var oldOptions = oldProgram.getCompilerOptions();
+            if ((oldOptions.module !== options.module) ||
+                (oldOptions.moduleResolution !== options.moduleResolution) ||
+                (oldOptions.noResolve !== options.noResolve) ||
+                (oldOptions.target !== options.target) ||
+                (oldOptions.noLib !== options.noLib) ||
+                (oldOptions.jsx !== options.jsx) ||
+                (oldOptions.allowJs !== options.allowJs) ||
+                (oldOptions.rootDir !== options.rootDir) ||
+                (oldOptions.typesSearchPaths !== options.typesSearchPaths) ||
+                (oldOptions.configFilePath !== options.configFilePath) ||
+                (oldOptions.baseUrl !== options.baseUrl) ||
+                (oldOptions.typesRoot !== options.typesRoot) ||
+                !ts.arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
+                !ts.mapIsEqualTo(oldOptions.paths, options.paths)) {
+                return false;
+            }
+            ts.Debug.assert(!oldProgram.structureIsReused);
+            var oldRootNames = oldProgram.getRootFileNames();
+            if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
+                return false;
+            }
+            if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
+                return false;
+            }
+            var newSourceFiles = [];
+            var filePaths = [];
+            var modifiedSourceFiles = [];
+            for (var _i = 0, _a = oldProgram.getSourceFiles(); _i < _a.length; _i++) {
+                var oldSourceFile = _a[_i];
+                var newSourceFile = host.getSourceFileByPath
+                    ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target)
+                    : host.getSourceFile(oldSourceFile.fileName, options.target);
+                if (!newSourceFile) {
+                    return false;
+                }
+                newSourceFile.path = oldSourceFile.path;
+                filePaths.push(newSourceFile.path);
+                if (oldSourceFile !== newSourceFile) {
+                    if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
+                        return false;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
+                        return false;
+                    }
+                    collectExternalModuleReferences(newSourceFile);
+                    if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
+                        return false;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
+                        return false;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
+                        return false;
+                    }
+                    var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
+                    if (resolveModuleNamesWorker) {
+                        var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
+                        var resolutions = resolveModuleNamesWorker(moduleNames, newSourceFilePath);
+                        var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
+                        if (resolutionsChanged) {
+                            return false;
+                        }
+                    }
+                    if (resolveTypeReferenceDirectiveNamesWorker) {
+                        var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
+                        var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
+                        var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
+                        if (resolutionsChanged) {
+                            return false;
+                        }
+                    }
+                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
+                    newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
+                    modifiedSourceFiles.push(newSourceFile);
+                }
+                else {
+                    newSourceFile = oldSourceFile;
+                }
+                newSourceFiles.push(newSourceFile);
+            }
+            for (var i = 0, len = newSourceFiles.length; i < len; i++) {
+                filesByName.set(filePaths[i], newSourceFiles[i]);
+            }
+            files = newSourceFiles;
+            fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
+            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
+                var modifiedFile = modifiedSourceFiles_1[_b];
+                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile);
+            }
+            resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
+            oldProgram.structureIsReused = true;
+            return true;
+        }
+        function getEmitHost(writeFileCallback) {
+            return {
+                getCanonicalFileName: getCanonicalFileName,
+                getCommonSourceDirectory: program.getCommonSourceDirectory,
+                getCompilerOptions: program.getCompilerOptions,
+                getCurrentDirectory: function () { return currentDirectory; },
+                getNewLine: function () { return host.getNewLine(); },
+                getSourceFile: program.getSourceFile,
+                getSourceFileByPath: program.getSourceFileByPath,
+                getSourceFiles: program.getSourceFiles,
+                writeFile: writeFileCallback || (function (fileName, data, writeByteOrderMark, onError, sourceFiles) { return host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles); }),
+                isEmitBlocked: isEmitBlocked
+            };
+        }
+        function getDiagnosticsProducingTypeChecker() {
+            return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, true));
+        }
+        function getTypeChecker() {
+            return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, false));
+        }
+        function emit(sourceFile, writeFileCallback, cancellationToken) {
+            var _this = this;
+            return runWithCancellationToken(function () { return emitWorker(_this, sourceFile, writeFileCallback, cancellationToken); });
+        }
+        function isEmitBlocked(emitFileName) {
+            return hasEmitBlockingDiagnostics.contains(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName));
+        }
+        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken) {
+            var declarationDiagnostics = [];
+            if (options.noEmit) {
+                return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
+            }
+            if (options.noEmitOnError) {
+                var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
+                if (diagnostics.length === 0 && program.getCompilerOptions().declaration) {
+                    declarationDiagnostics = program.getDeclarationDiagnostics(undefined, cancellationToken);
+                }
+                if (diagnostics.length > 0 || declarationDiagnostics.length > 0) {
+                    return {
+                        diagnostics: ts.concatenate(diagnostics, declarationDiagnostics),
+                        sourceMaps: undefined,
+                        emittedFiles: undefined,
+                        emitSkipped: true
+                    };
+                }
+            }
+            var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile);
+            var start = new Date().getTime();
+            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile);
+            ts.emitTime += new Date().getTime() - start;
+            return emitResult;
+        }
+        function getSourceFile(fileName) {
+            return getSourceFileByPath(ts.toPath(fileName, currentDirectory, getCanonicalFileName));
+        }
+        function getSourceFileByPath(path) {
+            return filesByName.get(path);
+        }
+        function getDiagnosticsHelper(sourceFile, getDiagnostics, cancellationToken) {
+            if (sourceFile) {
+                return getDiagnostics(sourceFile, cancellationToken);
+            }
+            var allDiagnostics = [];
+            ts.forEach(program.getSourceFiles(), function (sourceFile) {
+                if (cancellationToken) {
+                    cancellationToken.throwIfCancellationRequested();
+                }
+                ts.addRange(allDiagnostics, getDiagnostics(sourceFile, cancellationToken));
+            });
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function getSyntacticDiagnostics(sourceFile, cancellationToken) {
+            return getDiagnosticsHelper(sourceFile, getSyntacticDiagnosticsForFile, cancellationToken);
+        }
+        function getSemanticDiagnostics(sourceFile, cancellationToken) {
+            return getDiagnosticsHelper(sourceFile, getSemanticDiagnosticsForFile, cancellationToken);
+        }
+        function getDeclarationDiagnostics(sourceFile, cancellationToken) {
+            var options = program.getCompilerOptions();
+            if (!sourceFile || options.out || options.outFile) {
+                return getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+            }
+            else {
+                return getDiagnosticsHelper(sourceFile, getDeclarationDiagnosticsForFile, cancellationToken);
+            }
+        }
+        function getSyntacticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return sourceFile.parseDiagnostics;
+        }
+        function runWithCancellationToken(func) {
+            try {
+                return func();
+            }
+            catch (e) {
+                if (e instanceof ts.OperationCanceledException) {
+                    noDiagnosticsTypeChecker = undefined;
+                    diagnosticsProducingTypeChecker = undefined;
+                }
+                throw e;
+            }
+        }
+        function getSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var typeChecker = getDiagnosticsProducingTypeChecker();
+                ts.Debug.assert(!!sourceFile.bindDiagnostics);
+                var bindDiagnostics = sourceFile.bindDiagnostics;
+                var checkDiagnostics = ts.isSourceFileJavaScript(sourceFile) ?
+                    getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) :
+                    typeChecker.getDiagnostics(sourceFile, cancellationToken);
+                var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
+                var programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
+                return bindDiagnostics.concat(checkDiagnostics).concat(fileProcessingDiagnosticsInFile).concat(programDiagnosticsInFile);
+            });
+        }
+        function getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var diagnostics = [];
+                walk(sourceFile);
+                return diagnostics;
+                function walk(node) {
+                    if (!node) {
+                        return false;
+                    }
+                    switch (node.kind) {
+                        case 229:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 235:
+                            if (node.isExportEquals) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 221:
+                            var classDeclaration = node;
+                            if (checkModifiers(classDeclaration.modifiers) ||
+                                checkTypeParameters(classDeclaration.typeParameters)) {
+                                return true;
+                            }
+                            break;
+                        case 251:
+                            var heritageClause = node;
+                            if (heritageClause.token === 106) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 222:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 225:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 223:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 147:
+                        case 146:
+                        case 148:
+                        case 149:
+                        case 150:
+                        case 179:
+                        case 220:
+                        case 180:
+                        case 220:
+                            var functionDeclaration = node;
+                            if (checkModifiers(functionDeclaration.modifiers) ||
+                                checkTypeParameters(functionDeclaration.typeParameters) ||
+                                checkTypeAnnotation(functionDeclaration.type)) {
+                                return true;
+                            }
+                            break;
+                        case 200:
+                            var variableStatement = node;
+                            if (checkModifiers(variableStatement.modifiers)) {
+                                return true;
+                            }
+                            break;
+                        case 218:
+                            var variableDeclaration = node;
+                            if (checkTypeAnnotation(variableDeclaration.type)) {
+                                return true;
+                            }
+                            break;
+                        case 174:
+                        case 175:
+                            var expression = node;
+                            if (expression.typeArguments && expression.typeArguments.length > 0) {
+                                var start_2 = expression.typeArguments.pos;
+                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_2, expression.typeArguments.end - start_2, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 142:
+                            var parameter = node;
+                            if (parameter.modifiers) {
+                                var start_3 = parameter.modifiers.pos;
+                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_3, parameter.modifiers.end - start_3, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            if (parameter.questionToken) {
+                                diagnostics.push(ts.createDiagnosticForNode(parameter.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
+                                return true;
+                            }
+                            if (parameter.type) {
+                                diagnostics.push(ts.createDiagnosticForNode(parameter.type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 145:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.property_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 224:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 177:
+                            var typeAssertionExpression = node;
+                            diagnostics.push(ts.createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 143:
+                            if (!options.experimentalDecorators) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
+                            }
+                            return true;
+                    }
+                    return ts.forEachChild(node, walk);
+                }
+                function checkTypeParameters(typeParameters) {
+                    if (typeParameters) {
+                        var start_4 = typeParameters.pos;
+                        diagnostics.push(ts.createFileDiagnostic(sourceFile, start_4, typeParameters.end - start_4, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
+                        return true;
+                    }
+                    return false;
+                }
+                function checkTypeAnnotation(type) {
+                    if (type) {
+                        diagnostics.push(ts.createDiagnosticForNode(type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
+                        return true;
+                    }
+                    return false;
+                }
+                function checkModifiers(modifiers) {
+                    if (modifiers) {
+                        for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
+                            var modifier = modifiers_1[_i];
+                            switch (modifier.kind) {
+                                case 112:
+                                case 110:
+                                case 111:
+                                case 128:
+                                case 122:
+                                    diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
+                                    return true;
+                                case 113:
+                                case 82:
+                                case 74:
+                                case 77:
+                                case 115:
+                            }
+                        }
+                    }
+                    return false;
+                }
+            });
+        }
+        function getDeclarationDiagnosticsWorker(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
+                var writeFile = function () { };
+                return ts.getDeclarationDiagnostics(getEmitHost(writeFile), resolver, sourceFile);
+            });
+        }
+        function getDeclarationDiagnosticsForFile(sourceFile, cancellationToken) {
+            return ts.isDeclarationFile(sourceFile) ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+        }
+        function getOptionsDiagnostics() {
+            var allDiagnostics = [];
+            ts.addRange(allDiagnostics, fileProcessingDiagnostics.getGlobalDiagnostics());
+            ts.addRange(allDiagnostics, programDiagnostics.getGlobalDiagnostics());
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function getGlobalDiagnostics() {
+            var allDiagnostics = [];
+            ts.addRange(allDiagnostics, getDiagnosticsProducingTypeChecker().getGlobalDiagnostics());
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function hasExtension(fileName) {
+            return ts.getBaseFileName(fileName).indexOf(".") >= 0;
+        }
+        function processRootFile(fileName, isDefaultLib) {
+            processSourceFile(ts.normalizePath(fileName), isDefaultLib, true);
+        }
+        function fileReferenceIsEqualTo(a, b) {
+            return a.fileName === b.fileName;
+        }
+        function moduleNameIsEqualTo(a, b) {
+            return a.text === b.text;
+        }
+        function getTextOfLiteral(literal) {
+            return literal.text;
+        }
+        function collectExternalModuleReferences(file) {
+            if (file.imports) {
+                return;
+            }
+            var isJavaScriptFile = ts.isSourceFileJavaScript(file);
+            var isExternalModuleFile = ts.isExternalModule(file);
+            var imports;
+            var moduleAugmentations;
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var node = _a[_i];
+                collectModuleReferences(node, false);
+                if (isJavaScriptFile) {
+                    collectRequireCalls(node);
+                }
+            }
+            file.imports = imports || emptyArray;
+            file.moduleAugmentations = moduleAugmentations || emptyArray;
+            return;
+            function collectModuleReferences(node, inAmbientModule) {
+                switch (node.kind) {
+                    case 230:
+                    case 229:
+                    case 236:
+                        var moduleNameExpr = ts.getExternalModuleName(node);
+                        if (!moduleNameExpr || moduleNameExpr.kind !== 9) {
+                            break;
+                        }
+                        if (!moduleNameExpr.text) {
+                            break;
+                        }
+                        if (!inAmbientModule || !ts.isExternalModuleNameRelative(moduleNameExpr.text)) {
+                            (imports || (imports = [])).push(moduleNameExpr);
+                        }
+                        break;
+                    case 225:
+                        if (ts.isAmbientModule(node) && (inAmbientModule || node.flags & 2 || ts.isDeclarationFile(file))) {
+                            var moduleName = node.name;
+                            if (isExternalModuleFile || (inAmbientModule && !ts.isExternalModuleNameRelative(moduleName.text))) {
+                                (moduleAugmentations || (moduleAugmentations = [])).push(moduleName);
+                            }
+                            else if (!inAmbientModule) {
+                                for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
+                                    var statement = _a[_i];
+                                    collectModuleReferences(statement, true);
+                                }
+                            }
+                        }
+                }
+            }
+            function collectRequireCalls(node) {
+                if (ts.isRequireCall(node, true)) {
+                    (imports || (imports = [])).push(node.arguments[0]);
+                }
+                else {
+                    ts.forEachChild(node, collectRequireCalls);
+                }
+            }
+        }
+        function processSourceFile(fileName, isDefaultLib, isReference, refFile, refPos, refEnd) {
+            var diagnosticArgument;
+            var diagnostic;
+            if (hasExtension(fileName)) {
+                if (!options.allowNonTsExtensions && !ts.forEach(supportedExtensions, function (extension) { return ts.fileExtensionIs(host.getCanonicalFileName(fileName), extension); })) {
+                    diagnostic = ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1;
+                    diagnosticArgument = [fileName, "'" + supportedExtensions.join("', '") + "'"];
+                }
+                else if (!findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd)) {
+                    diagnostic = ts.Diagnostics.File_0_not_found;
+                    diagnosticArgument = [fileName];
+                }
+                else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
+                    diagnostic = ts.Diagnostics.A_file_cannot_have_a_reference_to_itself;
+                    diagnosticArgument = [fileName];
+                }
+            }
+            else {
+                var nonTsFile = options.allowNonTsExtensions && findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd);
+                if (!nonTsFile) {
+                    if (options.allowNonTsExtensions) {
+                        diagnostic = ts.Diagnostics.File_0_not_found;
+                        diagnosticArgument = [fileName];
+                    }
+                    else if (!ts.forEach(supportedExtensions, function (extension) { return findSourceFile(fileName + extension, ts.toPath(fileName + extension, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd); })) {
+                        diagnostic = ts.Diagnostics.File_0_not_found;
+                        fileName += ".ts";
+                        diagnosticArgument = [fileName];
+                    }
+                }
+            }
+            if (diagnostic) {
+                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
+                    fileProcessingDiagnostics.add(ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(diagnosticArgument)));
+                }
+                else {
+                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(diagnosticArgument)));
+                }
+            }
+        }
+        function reportFileNamesDifferOnlyInCasingError(fileName, existingFileName, refFile, refPos, refEnd) {
+            if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
+            }
+            else {
+                fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
+            }
+        }
+        function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) {
+            if (filesByName.contains(path)) {
+                var file_1 = filesByName.get(path);
+                if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
+                    reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
+                }
+                return file_1;
+            }
+            var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
+                if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                    fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
+                }
+                else {
+                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
+                }
+            });
+            filesByName.set(path, file);
+            if (file) {
+                file.path = path;
+                if (host.useCaseSensitiveFileNames()) {
+                    var existingFile = filesByNameIgnoreCase.get(path);
+                    if (existingFile) {
+                        reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd);
+                    }
+                    else {
+                        filesByNameIgnoreCase.set(path, file);
+                    }
+                }
+                skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
+                var basePath = ts.getDirectoryPath(fileName);
+                if (!options.noResolve) {
+                    processReferencedFiles(file, basePath, isDefaultLib);
+                    processTypeReferenceDirectives(file);
+                }
+                processImportedModules(file, basePath);
+                if (isDefaultLib) {
+                    files.unshift(file);
+                }
+                else {
+                    files.push(file);
+                }
+            }
+            return file;
+        }
+        function processReferencedFiles(file, basePath, isDefaultLib) {
+            ts.forEach(file.referencedFiles, function (ref) {
+                var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
+                processSourceFile(referencedFileName, isDefaultLib, true, file, ref.pos, ref.end);
+            });
+        }
+        function processTypeReferenceDirectives(file) {
+            var typeDirectives = ts.map(file.typeReferenceDirectives, function (l) { return l.fileName; });
+            var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeDirectives, file.fileName);
+            for (var i = 0; i < typeDirectives.length; i++) {
+                var ref = file.typeReferenceDirectives[i];
+                var resolvedTypeReferenceDirective = resolutions[i];
+                ts.setResolvedTypeReferenceDirective(file, ref.fileName, resolvedTypeReferenceDirective);
+                processTypeReferenceDirective(ref.fileName, resolvedTypeReferenceDirective, file, ref.pos, ref.end);
+            }
+        }
+        function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
+            var previousResolution = resolvedTypeReferenceDirectives[typeReferenceDirective];
+            if (previousResolution && previousResolution.primary) {
+                return;
+            }
+            var saveResolution = true;
+            if (resolvedTypeReferenceDirective) {
+                if (resolvedTypeReferenceDirective.primary) {
+                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, true, refFile, refPos, refEnd);
+                }
+                else {
+                    if (previousResolution) {
+                        var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
+                        if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
+                            fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
+                        }
+                        saveResolution = false;
+                    }
+                    else {
+                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, true, refFile, refPos, refEnd);
+                    }
+                }
+            }
+            else {
+                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_name_0, typeReferenceDirective));
+            }
+            if (saveResolution) {
+                resolvedTypeReferenceDirectives[typeReferenceDirective] = resolvedTypeReferenceDirective;
+            }
+        }
+        function createDiagnostic(refFile, refPos, refEnd, message) {
+            var args = [];
+            for (var _i = 4; _i < arguments.length; _i++) {
+                args[_i - 4] = arguments[_i];
+            }
+            if (refFile === undefined || refPos === undefined || refEnd === undefined) {
+                return ts.createCompilerDiagnostic.apply(void 0, [message].concat(args));
+            }
+            else {
+                return ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, message].concat(args));
+            }
+        }
+        function getCanonicalFileName(fileName) {
+            return host.getCanonicalFileName(fileName);
+        }
+        function processImportedModules(file, basePath) {
+            collectExternalModuleReferences(file);
+            if (file.imports.length || file.moduleAugmentations.length) {
+                file.resolvedModules = {};
+                var moduleNames = ts.map(ts.concatenate(file.imports, file.moduleAugmentations), getTextOfLiteral);
+                var resolutions = resolveModuleNamesWorker(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory));
+                for (var i = 0; i < moduleNames.length; i++) {
+                    var resolution = resolutions[i];
+                    ts.setResolvedModule(file, moduleNames[i], resolution);
+                    var shouldAddFile = resolution &&
+                        !options.noResolve &&
+                        i < file.imports.length;
+                    if (shouldAddFile) {
+                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), false, false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
+                    }
+                }
+            }
+            else {
+                file.resolvedModules = undefined;
+            }
+            return;
+        }
+        function computeCommonSourceDirectory(sourceFiles) {
+            var fileNames = [];
+            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
+                var file = sourceFiles_2[_i];
+                if (!file.isDeclarationFile) {
+                    fileNames.push(file.fileName);
+                }
+            }
+            return computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName);
+        }
+        function checkSourceFilesBelongToPath(sourceFiles, rootDirectory) {
+            var allFilesBelongToPath = true;
+            if (sourceFiles) {
+                var absoluteRootDirectoryPath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(rootDirectory, currentDirectory));
+                for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
+                    var sourceFile = sourceFiles_3[_i];
+                    if (!ts.isDeclarationFile(sourceFile)) {
+                        var absoluteSourceFilePath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
+                        if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
+                            programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
+                            allFilesBelongToPath = false;
+                        }
+                    }
+                }
+            }
+            return allFilesBelongToPath;
+        }
+        function verifyCompilerOptions() {
+            if (options.isolatedModules) {
+                if (options.declaration) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules"));
+                }
+                if (options.noEmitOnError) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules"));
+                }
+                if (options.out) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules"));
+                }
+                if (options.outFile) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules"));
+                }
+            }
+            if (options.inlineSourceMap) {
+                if (options.sourceMap) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap"));
+                }
+                if (options.mapRoot) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap"));
+                }
+            }
+            if (options.paths && options.baseUrl === undefined) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option));
+            }
+            if (options.paths) {
+                for (var key in options.paths) {
+                    if (!ts.hasProperty(options.paths, key)) {
+                        continue;
+                    }
+                    if (!hasZeroOrOneAsteriskCharacter(key)) {
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key));
+                    }
+                    if (ts.isArray(options.paths[key])) {
+                        for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
+                            var subst = _a[_i];
+                            var typeOfSubst = typeof subst;
+                            if (typeOfSubst === "string") {
+                                if (!hasZeroOrOneAsteriskCharacter(subst)) {
+                                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key));
+                                }
+                            }
+                            else {
+                                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst));
+                            }
+                        }
+                    }
+                    else {
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
+                    }
+                }
+            }
+            if (!options.sourceMap && !options.inlineSourceMap) {
+                if (options.inlineSources) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "inlineSources"));
+                }
+                if (options.sourceRoot) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "sourceRoot"));
+                }
+            }
+            if (options.out && options.outFile) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
+            }
+            if (options.mapRoot && !options.sourceMap) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
+            }
+            if (options.declarationDir) {
+                if (!options.declaration) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration"));
+                }
+                if (options.out || options.outFile) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile"));
+                }
+            }
+            if (options.lib && options.noLib) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib"));
+            }
+            var languageVersion = options.target || 0;
+            var outFile = options.outFile || options.out;
+            var firstExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) ? f : undefined; });
+            if (options.isolatedModules) {
+                if (options.module === ts.ModuleKind.None && languageVersion < 2) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
+                }
+                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
+                if (firstNonExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
+                }
+            }
+            else if (firstExternalModuleSourceFile && languageVersion < 2 && options.module === ts.ModuleKind.None) {
+                var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
+            }
+            if (options.module === ts.ModuleKind.ES6 && languageVersion < 2) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
+            }
+            if (outFile) {
+                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+                }
+                else if (options.module === undefined && firstExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
+                }
+            }
+            if (options.outDir ||
+                options.sourceRoot ||
+                options.mapRoot) {
+                var dir = getCommonSourceDirectory();
+                if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files));
+                }
+            }
+            if (!options.noEmit && options.allowJs && options.declaration) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration"));
+            }
+            if (options.emitDecoratorMetadata &&
+                !options.experimentalDecorators) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators"));
+            }
+            if (options.reactNamespace && !ts.isIdentifier(options.reactNamespace, languageVersion)) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace));
+            }
+            if (!options.noEmit && !options.suppressOutputPathCheck) {
+                var emitHost = getEmitHost();
+                var emitFilesSeen_1 = ts.createFileMap(!host.useCaseSensitiveFileNames() ? function (key) { return key.toLocaleLowerCase(); } : undefined);
+                ts.forEachExpectedEmitFile(emitHost, function (emitFileNames, sourceFiles, isBundledEmit) {
+                    verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen_1);
+                    verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
+                });
+            }
+            function verifyEmitFilePath(emitFileName, emitFilesSeen) {
+                if (emitFileName) {
+                    var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName);
+                    if (filesByName.contains(emitFilePath)) {
+                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file);
+                    }
+                    if (emitFilesSeen.contains(emitFilePath)) {
+                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files);
+                    }
+                    else {
+                        emitFilesSeen.set(emitFilePath, true);
+                    }
+                }
+            }
+        }
+        function createEmitBlockingDiagnostics(emitFileName, emitFilePath, message) {
+            hasEmitBlockingDiagnostics.set(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName), true);
+            programDiagnostics.add(ts.createCompilerDiagnostic(message, emitFileName));
+        }
+    }
+    ts.createProgram = createProgram;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var BreakpointResolver;
+    (function (BreakpointResolver) {
+        function spanInSourceFileAtLocation(sourceFile, position) {
+            if (sourceFile.isDeclarationFile) {
+                return undefined;
+            }
+            var tokenAtLocation = ts.getTokenAtPosition(sourceFile, position);
+            var lineOfPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
+            if (sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getStart(sourceFile)).line > lineOfPosition) {
+                tokenAtLocation = ts.findPrecedingToken(tokenAtLocation.pos, sourceFile);
+                if (!tokenAtLocation || sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getEnd()).line !== lineOfPosition) {
+                    return undefined;
+                }
+            }
+            if (ts.isInAmbientContext(tokenAtLocation)) {
+                return undefined;
+            }
+            return spanInNode(tokenAtLocation);
+            function textSpan(startNode, endNode) {
+                var start = startNode.decorators ?
+                    ts.skipTrivia(sourceFile.text, startNode.decorators.end) :
+                    startNode.getStart(sourceFile);
+                return ts.createTextSpanFromBounds(start, (endNode || startNode).getEnd());
+            }
+            function textSpanEndingAtNextToken(startNode, previousTokenToFindNextEndToken) {
+                return textSpan(startNode, ts.findNextToken(previousTokenToFindNextEndToken, previousTokenToFindNextEndToken.parent));
+            }
+            function spanInNodeIfStartsOnSameLine(node, otherwiseOnNode) {
+                if (node && lineOfPosition === sourceFile.getLineAndCharacterOfPosition(node.getStart(sourceFile)).line) {
+                    return spanInNode(node);
+                }
+                return spanInNode(otherwiseOnNode);
+            }
+            function spanInNodeArray(nodeArray) {
+                return ts.createTextSpanFromBounds(ts.skipTrivia(sourceFile.text, nodeArray.pos), nodeArray.end);
+            }
+            function spanInPreviousNode(node) {
+                return spanInNode(ts.findPrecedingToken(node.pos, sourceFile));
+            }
+            function spanInNextNode(node) {
+                return spanInNode(ts.findNextToken(node, node.parent));
+            }
+            function spanInNode(node) {
+                if (node) {
+                    switch (node.kind) {
+                        case 200:
+                            return spanInVariableDeclaration(node.declarationList.declarations[0]);
+                        case 218:
+                        case 145:
+                        case 144:
+                            return spanInVariableDeclaration(node);
+                        case 142:
+                            return spanInParameterDeclaration(node);
+                        case 220:
+                        case 147:
+                        case 146:
+                        case 149:
+                        case 150:
+                        case 148:
+                        case 179:
+                        case 180:
+                            return spanInFunctionDeclaration(node);
+                        case 199:
+                            if (ts.isFunctionBlock(node)) {
+                                return spanInFunctionBlock(node);
+                            }
+                        case 226:
+                            return spanInBlock(node);
+                        case 252:
+                            return spanInBlock(node.block);
+                        case 202:
+                            return textSpan(node.expression);
+                        case 211:
+                            return textSpan(node.getChildAt(0), node.expression);
+                        case 205:
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 204:
+                            return spanInNode(node.statement);
+                        case 217:
+                            return textSpan(node.getChildAt(0));
+                        case 203:
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 214:
+                            return spanInNode(node.statement);
+                        case 210:
+                        case 209:
+                            return textSpan(node.getChildAt(0), node.label);
+                        case 206:
+                            return spanInForStatement(node);
+                        case 207:
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 208:
+                            return spanInInitializerOfForLike(node);
+                        case 213:
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 249:
+                        case 250:
+                            return spanInNode(node.statements[0]);
+                        case 216:
+                            return spanInBlock(node.tryBlock);
+                        case 215:
+                            return textSpan(node, node.expression);
+                        case 235:
+                            return textSpan(node, node.expression);
+                        case 229:
+                            return textSpan(node, node.moduleReference);
+                        case 230:
+                            return textSpan(node, node.moduleSpecifier);
+                        case 236:
+                            return textSpan(node, node.moduleSpecifier);
+                        case 225:
+                            if (ts.getModuleInstanceState(node) !== 1) {
+                                return undefined;
+                            }
+                        case 221:
+                        case 224:
+                        case 255:
+                        case 169:
+                            return textSpan(node);
+                        case 212:
+                            return spanInNode(node.statement);
+                        case 143:
+                            return spanInNodeArray(node.parent.decorators);
+                        case 167:
+                        case 168:
+                            return spanInBindingPattern(node);
+                        case 222:
+                        case 223:
+                            return undefined;
+                        case 23:
+                        case 1:
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile));
+                        case 24:
+                            return spanInPreviousNode(node);
+                        case 15:
+                            return spanInOpenBraceToken(node);
+                        case 16:
+                            return spanInCloseBraceToken(node);
+                        case 20:
+                            return spanInCloseBracketToken(node);
+                        case 17:
+                            return spanInOpenParenToken(node);
+                        case 18:
+                            return spanInCloseParenToken(node);
+                        case 54:
+                            return spanInColonToken(node);
+                        case 27:
+                        case 25:
+                            return spanInGreaterThanOrLessThanToken(node);
+                        case 104:
+                            return spanInWhileKeyword(node);
+                        case 80:
+                        case 72:
+                        case 85:
+                            return spanInNextNode(node);
+                        case 138:
+                            return spanInOfKeyword(node);
+                        default:
+                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node)) {
+                                return spanInArrayLiteralOrObjectLiteralDestructuringPattern(node);
+                            }
+                            if ((node.kind === 69 ||
+                                node.kind == 191 ||
+                                node.kind === 253 ||
+                                node.kind === 254) &&
+                                ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
+                                return textSpan(node);
+                            }
+                            if (node.kind === 187) {
+                                var binaryExpression = node;
+                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left)) {
+                                    return spanInArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left);
+                                }
+                                if (binaryExpression.operatorToken.kind === 56 &&
+                                    ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.parent)) {
+                                    return textSpan(node);
+                                }
+                                if (binaryExpression.operatorToken.kind === 24) {
+                                    return spanInNode(binaryExpression.left);
+                                }
+                            }
+                            if (ts.isExpression(node)) {
+                                switch (node.parent.kind) {
+                                    case 204:
+                                        return spanInPreviousNode(node);
+                                    case 143:
+                                        return spanInNode(node.parent);
+                                    case 206:
+                                    case 208:
+                                        return textSpan(node);
+                                    case 187:
+                                        if (node.parent.operatorToken.kind === 24) {
+                                            return textSpan(node);
+                                        }
+                                        break;
+                                    case 180:
+                                        if (node.parent.body === node) {
+                                            return textSpan(node);
+                                        }
+                                        break;
+                                }
+                            }
+                            if (node.parent.kind === 253 &&
+                                node.parent.name === node &&
+                                !ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.parent)) {
+                                return spanInNode(node.parent.initializer);
+                            }
+                            if (node.parent.kind === 177 && node.parent.type === node) {
+                                return spanInNextNode(node.parent.type);
+                            }
+                            if (ts.isFunctionLike(node.parent) && node.parent.type === node) {
+                                return spanInPreviousNode(node);
+                            }
+                            if ((node.parent.kind === 218 ||
+                                node.parent.kind === 142)) {
+                                var paramOrVarDecl = node.parent;
+                                if (paramOrVarDecl.initializer === node ||
+                                    paramOrVarDecl.type === node ||
+                                    ts.isAssignmentOperator(node.kind)) {
+                                    return spanInPreviousNode(node);
+                                }
+                            }
+                            if (node.parent.kind === 187) {
+                                var binaryExpression = node.parent;
+                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left) &&
+                                    (binaryExpression.right === node ||
+                                        binaryExpression.operatorToken === node)) {
+                                    return spanInPreviousNode(node);
+                                }
+                            }
+                            return spanInNode(node.parent);
+                    }
+                }
+                function textSpanFromVariableDeclaration(variableDeclaration) {
+                    var declarations = variableDeclaration.parent.declarations;
+                    if (declarations && declarations[0] === variableDeclaration) {
+                        return textSpan(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent), variableDeclaration);
+                    }
+                    else {
+                        return textSpan(variableDeclaration);
+                    }
+                }
+                function spanInVariableDeclaration(variableDeclaration) {
+                    if (variableDeclaration.parent.parent.kind === 207) {
+                        return spanInNode(variableDeclaration.parent.parent);
+                    }
+                    if (ts.isBindingPattern(variableDeclaration.name)) {
+                        return spanInBindingPattern(variableDeclaration.name);
+                    }
+                    if (variableDeclaration.initializer ||
+                        (variableDeclaration.flags & 1) ||
+                        variableDeclaration.parent.parent.kind === 208) {
+                        return textSpanFromVariableDeclaration(variableDeclaration);
+                    }
+                    var declarations = variableDeclaration.parent.declarations;
+                    if (declarations && declarations[0] !== variableDeclaration) {
+                        return spanInNode(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent));
+                    }
+                }
+                function canHaveSpanInParameterDeclaration(parameter) {
+                    return !!parameter.initializer || parameter.dotDotDotToken !== undefined ||
+                        !!(parameter.flags & 4) || !!(parameter.flags & 8);
+                }
+                function spanInParameterDeclaration(parameter) {
+                    if (ts.isBindingPattern(parameter.name)) {
+                        return spanInBindingPattern(parameter.name);
+                    }
+                    else if (canHaveSpanInParameterDeclaration(parameter)) {
+                        return textSpan(parameter);
+                    }
+                    else {
+                        var functionDeclaration = parameter.parent;
+                        var indexOfParameter = ts.indexOf(functionDeclaration.parameters, parameter);
+                        if (indexOfParameter) {
+                            return spanInParameterDeclaration(functionDeclaration.parameters[indexOfParameter - 1]);
+                        }
+                        else {
+                            return spanInNode(functionDeclaration.body);
+                        }
+                    }
+                }
+                function canFunctionHaveSpanInWholeDeclaration(functionDeclaration) {
+                    return !!(functionDeclaration.flags & 1) ||
+                        (functionDeclaration.parent.kind === 221 && functionDeclaration.kind !== 148);
+                }
+                function spanInFunctionDeclaration(functionDeclaration) {
+                    if (!functionDeclaration.body) {
+                        return undefined;
+                    }
+                    if (canFunctionHaveSpanInWholeDeclaration(functionDeclaration)) {
+                        return textSpan(functionDeclaration);
+                    }
+                    return spanInNode(functionDeclaration.body);
+                }
+                function spanInFunctionBlock(block) {
+                    var nodeForSpanInBlock = block.statements.length ? block.statements[0] : block.getLastToken();
+                    if (canFunctionHaveSpanInWholeDeclaration(block.parent)) {
+                        return spanInNodeIfStartsOnSameLine(block.parent, nodeForSpanInBlock);
+                    }
+                    return spanInNode(nodeForSpanInBlock);
+                }
+                function spanInBlock(block) {
+                    switch (block.parent.kind) {
+                        case 225:
+                            if (ts.getModuleInstanceState(block.parent) !== 1) {
+                                return undefined;
+                            }
+                        case 205:
+                        case 203:
+                        case 207:
+                            return spanInNodeIfStartsOnSameLine(block.parent, block.statements[0]);
+                        case 206:
+                        case 208:
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(block.pos, sourceFile, block.parent), block.statements[0]);
+                    }
+                    return spanInNode(block.statements[0]);
+                }
+                function spanInInitializerOfForLike(forLikeStatement) {
+                    if (forLikeStatement.initializer.kind === 219) {
+                        var variableDeclarationList = forLikeStatement.initializer;
+                        if (variableDeclarationList.declarations.length > 0) {
+                            return spanInNode(variableDeclarationList.declarations[0]);
+                        }
+                    }
+                    else {
+                        return spanInNode(forLikeStatement.initializer);
+                    }
+                }
+                function spanInForStatement(forStatement) {
+                    if (forStatement.initializer) {
+                        return spanInInitializerOfForLike(forStatement);
+                    }
+                    if (forStatement.condition) {
+                        return textSpan(forStatement.condition);
+                    }
+                    if (forStatement.incrementor) {
+                        return textSpan(forStatement.incrementor);
+                    }
+                }
+                function spanInBindingPattern(bindingPattern) {
+                    var firstBindingElement = ts.forEach(bindingPattern.elements, function (element) { return element.kind !== 193 ? element : undefined; });
+                    if (firstBindingElement) {
+                        return spanInNode(firstBindingElement);
+                    }
+                    if (bindingPattern.parent.kind === 169) {
+                        return textSpan(bindingPattern.parent);
+                    }
+                    return textSpanFromVariableDeclaration(bindingPattern.parent);
+                }
+                function spanInArrayLiteralOrObjectLiteralDestructuringPattern(node) {
+                    ts.Debug.assert(node.kind !== 168 && node.kind !== 167);
+                    var elements = node.kind === 170 ?
+                        node.elements :
+                        node.properties;
+                    var firstBindingElement = ts.forEach(elements, function (element) { return element.kind !== 193 ? element : undefined; });
+                    if (firstBindingElement) {
+                        return spanInNode(firstBindingElement);
+                    }
+                    return textSpan(node.parent.kind === 187 ? node.parent : node);
+                }
+                function spanInOpenBraceToken(node) {
+                    switch (node.parent.kind) {
+                        case 224:
+                            var enumDeclaration = node.parent;
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), enumDeclaration.members.length ? enumDeclaration.members[0] : enumDeclaration.getLastToken(sourceFile));
+                        case 221:
+                            var classDeclaration = node.parent;
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), classDeclaration.members.length ? classDeclaration.members[0] : classDeclaration.getLastToken(sourceFile));
+                        case 227:
+                            return spanInNodeIfStartsOnSameLine(node.parent.parent, node.parent.clauses[0]);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInCloseBraceToken(node) {
+                    switch (node.parent.kind) {
+                        case 226:
+                            if (ts.getModuleInstanceState(node.parent.parent) !== 1) {
+                                return undefined;
+                            }
+                        case 224:
+                        case 221:
+                            return textSpan(node);
+                        case 199:
+                            if (ts.isFunctionBlock(node.parent)) {
+                                return textSpan(node);
+                            }
+                        case 252:
+                            return spanInNode(ts.lastOrUndefined(node.parent.statements));
+                        case 227:
+                            var caseBlock = node.parent;
+                            var lastClause = ts.lastOrUndefined(caseBlock.clauses);
+                            if (lastClause) {
+                                return spanInNode(ts.lastOrUndefined(lastClause.statements));
+                            }
+                            return undefined;
+                        case 167:
+                            var bindingPattern = node.parent;
+                            return spanInNode(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
+                        default:
+                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
+                                var objectLiteral = node.parent;
+                                return textSpan(ts.lastOrUndefined(objectLiteral.properties) || objectLiteral);
+                            }
+                            return spanInNode(node.parent);
+                    }
+                }
+                function spanInCloseBracketToken(node) {
+                    switch (node.parent.kind) {
+                        case 168:
+                            var bindingPattern = node.parent;
+                            return textSpan(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
+                        default:
+                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
+                                var arrayLiteral = node.parent;
+                                return textSpan(ts.lastOrUndefined(arrayLiteral.elements) || arrayLiteral);
+                            }
+                            return spanInNode(node.parent);
+                    }
+                }
+                function spanInOpenParenToken(node) {
+                    if (node.parent.kind === 204 ||
+                        node.parent.kind === 174 ||
+                        node.parent.kind === 175) {
+                        return spanInPreviousNode(node);
+                    }
+                    if (node.parent.kind === 178) {
+                        return spanInNextNode(node);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInCloseParenToken(node) {
+                    switch (node.parent.kind) {
+                        case 179:
+                        case 220:
+                        case 180:
+                        case 147:
+                        case 146:
+                        case 149:
+                        case 150:
+                        case 148:
+                        case 205:
+                        case 204:
+                        case 206:
+                        case 208:
+                        case 174:
+                        case 175:
+                        case 178:
+                            return spanInPreviousNode(node);
+                        default:
+                            return spanInNode(node.parent);
+                    }
+                }
+                function spanInColonToken(node) {
+                    if (ts.isFunctionLike(node.parent) ||
+                        node.parent.kind === 253 ||
+                        node.parent.kind === 142) {
+                        return spanInPreviousNode(node);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInGreaterThanOrLessThanToken(node) {
+                    if (node.parent.kind === 177) {
+                        return spanInNextNode(node);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInWhileKeyword(node) {
+                    if (node.parent.kind === 204) {
+                        return textSpanEndingAtNextToken(node, node.parent.expression);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInOfKeyword(node) {
+                    if (node.parent.kind === 208) {
+                        return spanInNextNode(node);
+                    }
+                    return spanInNode(node.parent);
+                }
+            }
+        }
+        BreakpointResolver.spanInSourceFileAtLocation = spanInSourceFileAtLocation;
+    })(BreakpointResolver = ts.BreakpointResolver || (ts.BreakpointResolver = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var OutliningElementsCollector;
+    (function (OutliningElementsCollector) {
+        function collectElements(sourceFile) {
+            var elements = [];
+            var collapseText = "...";
+            function addOutliningSpan(hintSpanNode, startElement, endElement, autoCollapse) {
+                if (hintSpanNode && startElement && endElement) {
+                    var span = {
+                        textSpan: ts.createTextSpanFromBounds(startElement.pos, endElement.end),
+                        hintSpan: ts.createTextSpanFromBounds(hintSpanNode.getStart(), hintSpanNode.end),
+                        bannerText: collapseText,
+                        autoCollapse: autoCollapse
+                    };
+                    elements.push(span);
+                }
+            }
+            function addOutliningSpanComments(commentSpan, autoCollapse) {
+                if (commentSpan) {
+                    var span = {
+                        textSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
+                        hintSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
+                        bannerText: collapseText,
+                        autoCollapse: autoCollapse
+                    };
+                    elements.push(span);
+                }
+            }
+            function addOutliningForLeadingCommentsForNode(n) {
+                var comments = ts.getLeadingCommentRangesOfNode(n, sourceFile);
+                if (comments) {
+                    var firstSingleLineCommentStart = -1;
+                    var lastSingleLineCommentEnd = -1;
+                    var isFirstSingleLineComment = true;
+                    var singleLineCommentCount = 0;
+                    for (var _i = 0, comments_2 = comments; _i < comments_2.length; _i++) {
+                        var currentComment = comments_2[_i];
+                        if (currentComment.kind === 2) {
+                            if (isFirstSingleLineComment) {
+                                firstSingleLineCommentStart = currentComment.pos;
+                            }
+                            isFirstSingleLineComment = false;
+                            lastSingleLineCommentEnd = currentComment.end;
+                            singleLineCommentCount++;
+                        }
+                        else if (currentComment.kind === 3) {
+                            combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
+                            addOutliningSpanComments(currentComment, false);
+                            singleLineCommentCount = 0;
+                            lastSingleLineCommentEnd = -1;
+                            isFirstSingleLineComment = true;
+                        }
+                    }
+                    combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
+                }
+            }
+            function combineAndAddMultipleSingleLineComments(count, start, end) {
+                if (count > 1) {
+                    var multipleSingleLineComments = {
+                        pos: start,
+                        end: end,
+                        kind: 2
+                    };
+                    addOutliningSpanComments(multipleSingleLineComments, false);
+                }
+            }
+            function autoCollapse(node) {
+                return ts.isFunctionBlock(node) && node.parent.kind !== 180;
+            }
+            var depth = 0;
+            var maxDepth = 20;
+            function walk(n) {
+                if (depth > maxDepth) {
+                    return;
+                }
+                if (ts.isDeclaration(n)) {
+                    addOutliningForLeadingCommentsForNode(n);
+                }
+                switch (n.kind) {
+                    case 199:
+                        if (!ts.isFunctionBlock(n)) {
+                            var parent_14 = n.parent;
+                            var openBrace = ts.findChildOfKind(n, 15, sourceFile);
+                            var closeBrace = ts.findChildOfKind(n, 16, sourceFile);
+                            if (parent_14.kind === 204 ||
+                                parent_14.kind === 207 ||
+                                parent_14.kind === 208 ||
+                                parent_14.kind === 206 ||
+                                parent_14.kind === 203 ||
+                                parent_14.kind === 205 ||
+                                parent_14.kind === 212 ||
+                                parent_14.kind === 252) {
+                                addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
+                                break;
+                            }
+                            if (parent_14.kind === 216) {
+                                var tryStatement = parent_14;
+                                if (tryStatement.tryBlock === n) {
+                                    addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
+                                    break;
+                                }
+                                else if (tryStatement.finallyBlock === n) {
+                                    var finallyKeyword = ts.findChildOfKind(tryStatement, 85, sourceFile);
+                                    if (finallyKeyword) {
+                                        addOutliningSpan(finallyKeyword, openBrace, closeBrace, autoCollapse(n));
+                                        break;
+                                    }
+                                }
+                            }
+                            var span = ts.createTextSpanFromBounds(n.getStart(), n.end);
+                            elements.push({
+                                textSpan: span,
+                                hintSpan: span,
+                                bannerText: collapseText,
+                                autoCollapse: autoCollapse(n)
+                            });
+                            break;
+                        }
+                    case 226: {
+                        var openBrace = ts.findChildOfKind(n, 15, sourceFile);
+                        var closeBrace = ts.findChildOfKind(n, 16, sourceFile);
+                        addOutliningSpan(n.parent, openBrace, closeBrace, autoCollapse(n));
+                        break;
+                    }
+                    case 221:
+                    case 222:
+                    case 224:
+                    case 171:
+                    case 227: {
+                        var openBrace = ts.findChildOfKind(n, 15, sourceFile);
+                        var closeBrace = ts.findChildOfKind(n, 16, sourceFile);
+                        addOutliningSpan(n, openBrace, closeBrace, autoCollapse(n));
+                        break;
+                    }
+                    case 170:
+                        var openBracket = ts.findChildOfKind(n, 19, sourceFile);
+                        var closeBracket = ts.findChildOfKind(n, 20, sourceFile);
+                        addOutliningSpan(n, openBracket, closeBracket, autoCollapse(n));
+                        break;
+                }
+                depth++;
+                ts.forEachChild(n, walk);
+                depth--;
+            }
+            walk(sourceFile);
+            return elements;
+        }
+        OutliningElementsCollector.collectElements = collectElements;
+    })(OutliningElementsCollector = ts.OutliningElementsCollector || (ts.OutliningElementsCollector = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var NavigateTo;
+    (function (NavigateTo) {
+        function getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount) {
+            var patternMatcher = ts.createPatternMatcher(searchValue);
+            var rawItems = [];
+            var baseSensitivity = { sensitivity: "base" };
+            ts.forEach(program.getSourceFiles(), function (sourceFile) {
+                cancellationToken.throwIfCancellationRequested();
+                var nameToDeclarations = sourceFile.getNamedDeclarations();
+                for (var name_35 in nameToDeclarations) {
+                    var declarations = ts.getProperty(nameToDeclarations, name_35);
+                    if (declarations) {
+                        var matches = patternMatcher.getMatchesForLastSegmentOfPattern(name_35);
+                        if (!matches) {
+                            continue;
+                        }
+                        for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
+                            var declaration = declarations_7[_i];
+                            if (patternMatcher.patternContainsDots) {
+                                var containers = getContainers(declaration);
+                                if (!containers) {
+                                    return undefined;
+                                }
+                                matches = patternMatcher.getMatches(containers, name_35);
+                                if (!matches) {
+                                    continue;
+                                }
+                            }
+                            var fileName = sourceFile.fileName;
+                            var matchKind = bestMatchKind(matches);
+                            rawItems.push({ name: name_35, fileName: fileName, matchKind: matchKind, isCaseSensitive: allMatchesAreCaseSensitive(matches), declaration: declaration });
+                        }
+                    }
+                }
+            });
+            rawItems = ts.filter(rawItems, function (item) {
+                var decl = item.declaration;
+                if (decl.kind === 231 || decl.kind === 234 || decl.kind === 229) {
+                    var importer = checker.getSymbolAtLocation(decl.name);
+                    var imported = checker.getAliasedSymbol(importer);
+                    return importer.name !== imported.name;
+                }
+                else {
+                    return true;
+                }
+            });
+            rawItems.sort(compareNavigateToItems);
+            if (maxResultCount !== undefined) {
+                rawItems = rawItems.slice(0, maxResultCount);
+            }
+            var items = ts.map(rawItems, createNavigateToItem);
+            return items;
+            function allMatchesAreCaseSensitive(matches) {
+                ts.Debug.assert(matches.length > 0);
+                for (var _i = 0, matches_1 = matches; _i < matches_1.length; _i++) {
+                    var match = matches_1[_i];
+                    if (!match.isCaseSensitive) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            function getTextOfIdentifierOrLiteral(node) {
+                if (node) {
+                    if (node.kind === 69 ||
+                        node.kind === 9 ||
+                        node.kind === 8) {
+                        return node.text;
+                    }
+                }
+                return undefined;
+            }
+            function tryAddSingleDeclarationName(declaration, containers) {
+                if (declaration && declaration.name) {
+                    var text = getTextOfIdentifierOrLiteral(declaration.name);
+                    if (text !== undefined) {
+                        containers.unshift(text);
+                    }
+                    else if (declaration.name.kind === 140) {
+                        return tryAddComputedPropertyName(declaration.name.expression, containers, true);
+                    }
+                    else {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            function tryAddComputedPropertyName(expression, containers, includeLastPortion) {
+                var text = getTextOfIdentifierOrLiteral(expression);
+                if (text !== undefined) {
+                    if (includeLastPortion) {
+                        containers.unshift(text);
+                    }
+                    return true;
+                }
+                if (expression.kind === 172) {
+                    var propertyAccess = expression;
+                    if (includeLastPortion) {
+                        containers.unshift(propertyAccess.name.text);
+                    }
+                    return tryAddComputedPropertyName(propertyAccess.expression, containers, true);
+                }
+                return false;
+            }
+            function getContainers(declaration) {
+                var containers = [];
+                if (declaration.name.kind === 140) {
+                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, false)) {
+                        return undefined;
+                    }
+                }
+                declaration = ts.getContainerNode(declaration);
+                while (declaration) {
+                    if (!tryAddSingleDeclarationName(declaration, containers)) {
+                        return undefined;
+                    }
+                    declaration = ts.getContainerNode(declaration);
+                }
+                return containers;
+            }
+            function bestMatchKind(matches) {
+                ts.Debug.assert(matches.length > 0);
+                var bestMatchKind = ts.PatternMatchKind.camelCase;
+                for (var _i = 0, matches_2 = matches; _i < matches_2.length; _i++) {
+                    var match = matches_2[_i];
+                    var kind = match.kind;
+                    if (kind < bestMatchKind) {
+                        bestMatchKind = kind;
+                    }
+                }
+                return bestMatchKind;
+            }
+            function compareNavigateToItems(i1, i2) {
+                return i1.matchKind - i2.matchKind ||
+                    i1.name.localeCompare(i2.name, undefined, baseSensitivity) ||
+                    i1.name.localeCompare(i2.name);
+            }
+            function createNavigateToItem(rawItem) {
+                var declaration = rawItem.declaration;
+                var container = ts.getContainerNode(declaration);
+                return {
+                    name: rawItem.name,
+                    kind: ts.getNodeKind(declaration),
+                    kindModifiers: ts.getNodeModifiers(declaration),
+                    matchKind: ts.PatternMatchKind[rawItem.matchKind],
+                    isCaseSensitive: rawItem.isCaseSensitive,
+                    fileName: rawItem.fileName,
+                    textSpan: ts.createTextSpanFromBounds(declaration.getStart(), declaration.getEnd()),
+                    containerName: container && container.name ? container.name.text : "",
+                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
+                };
+            }
+        }
+        NavigateTo.getNavigateToItems = getNavigateToItems;
+    })(NavigateTo = ts.NavigateTo || (ts.NavigateTo = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var NavigationBar;
+    (function (NavigationBar) {
+        function getNavigationBarItems(sourceFile, compilerOptions) {
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                return getJsNavigationBarItems(sourceFile, compilerOptions);
+            }
+            return getItemsWorker(getTopLevelNodes(sourceFile), createTopLevelItem);
+            function getIndent(node) {
+                var indent = 1;
+                var current = node.parent;
+                while (current) {
+                    switch (current.kind) {
+                        case 225:
+                            do {
+                                current = current.parent;
+                            } while (current.kind === 225);
+                        case 221:
+                        case 224:
+                        case 222:
+                        case 220:
+                            indent++;
+                    }
+                    current = current.parent;
+                }
+                return indent;
+            }
+            function getChildNodes(nodes) {
+                var childNodes = [];
+                function visit(node) {
+                    switch (node.kind) {
+                        case 200:
+                            ts.forEach(node.declarationList.declarations, visit);
+                            break;
+                        case 167:
+                        case 168:
+                            ts.forEach(node.elements, visit);
+                            break;
+                        case 236:
+                            if (node.exportClause) {
+                                ts.forEach(node.exportClause.elements, visit);
+                            }
+                            break;
+                        case 230:
+                            var importClause = node.importClause;
+                            if (importClause) {
+                                if (importClause.name) {
+                                    childNodes.push(importClause);
+                                }
+                                if (importClause.namedBindings) {
+                                    if (importClause.namedBindings.kind === 232) {
+                                        childNodes.push(importClause.namedBindings);
+                                    }
+                                    else {
+                                        ts.forEach(importClause.namedBindings.elements, visit);
+                                    }
+                                }
+                            }
+                            break;
+                        case 169:
+                        case 218:
+                            if (ts.isBindingPattern(node.name)) {
+                                visit(node.name);
+                                break;
+                            }
+                        case 221:
+                        case 224:
+                        case 222:
+                        case 225:
+                        case 220:
+                        case 229:
+                        case 234:
+                        case 238:
+                        case 223:
+                            childNodes.push(node);
+                            break;
+                    }
+                }
+                ts.forEach(nodes, visit);
+                return sortNodes(childNodes);
+            }
+            function getTopLevelNodes(node) {
+                var topLevelNodes = [];
+                topLevelNodes.push(node);
+                addTopLevelNodes(node.statements, topLevelNodes);
+                return topLevelNodes;
+            }
+            function sortNodes(nodes) {
+                return nodes.slice(0).sort(function (n1, n2) {
+                    if (n1.name && n2.name) {
+                        return localeCompareFix(ts.getPropertyNameForPropertyNameNode(n1.name), ts.getPropertyNameForPropertyNameNode(n2.name));
+                    }
+                    else if (n1.name) {
+                        return 1;
+                    }
+                    else if (n2.name) {
+                        return -1;
+                    }
+                    else {
+                        return n1.kind - n2.kind;
+                    }
+                });
+                function localeCompareFix(a, b) {
+                    var cmp = a.toLowerCase().localeCompare(b.toLowerCase());
+                    if (cmp !== 0)
+                        return cmp;
+                    return a < b ? 1 : a > b ? -1 : 0;
+                }
+            }
+            function addTopLevelNodes(nodes, topLevelNodes) {
+                nodes = sortNodes(nodes);
+                for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
+                    var node = nodes_4[_i];
+                    switch (node.kind) {
+                        case 221:
+                            topLevelNodes.push(node);
+                            for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                                var member = _b[_a];
+                                if (member.kind === 147 || member.kind === 148) {
+                                    if (member.body) {
+                                        if (hasNamedFunctionDeclarations(member.body.statements)) {
+                                            topLevelNodes.push(member);
+                                        }
+                                        addTopLevelNodes(member.body.statements, topLevelNodes);
+                                    }
+                                }
+                            }
+                            break;
+                        case 224:
+                        case 222:
+                        case 223:
+                            topLevelNodes.push(node);
+                            break;
+                        case 225:
+                            var moduleDeclaration = node;
+                            topLevelNodes.push(node);
+                            addTopLevelNodes(getInnermostModule(moduleDeclaration).body.statements, topLevelNodes);
+                            break;
+                        case 220:
+                            var functionDeclaration = node;
+                            if (isTopLevelFunctionDeclaration(functionDeclaration)) {
+                                topLevelNodes.push(node);
+                                addTopLevelNodes(functionDeclaration.body.statements, topLevelNodes);
+                            }
+                            break;
+                    }
+                }
+            }
+            function hasNamedFunctionDeclarations(nodes) {
+                for (var _i = 0, nodes_5 = nodes; _i < nodes_5.length; _i++) {
+                    var s = nodes_5[_i];
+                    if (s.kind === 220 && !isEmpty(s.name.text)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function isTopLevelFunctionDeclaration(functionDeclaration) {
+                if (functionDeclaration.kind === 220) {
+                    if (functionDeclaration.body && functionDeclaration.body.kind === 199) {
+                        if (hasNamedFunctionDeclarations(functionDeclaration.body.statements)) {
+                            return true;
+                        }
+                        if (!ts.isFunctionBlock(functionDeclaration.parent)) {
+                            return true;
+                        }
+                        else {
+                            var grandParentKind = functionDeclaration.parent.parent.kind;
+                            if (grandParentKind === 147 ||
+                                grandParentKind === 148) {
+                                return true;
+                            }
+                        }
+                    }
+                }
+                return false;
+            }
+            function getItemsWorker(nodes, createItem) {
+                var items = [];
+                var keyToItem = {};
+                for (var _i = 0, nodes_6 = nodes; _i < nodes_6.length; _i++) {
+                    var child = nodes_6[_i];
+                    var item = createItem(child);
+                    if (item !== undefined) {
+                        if (item.text.length > 0) {
+                            var key = item.text + "-" + item.kind + "-" + item.indent;
+                            var itemWithSameName = keyToItem[key];
+                            if (itemWithSameName) {
+                                merge(itemWithSameName, item);
+                            }
+                            else {
+                                keyToItem[key] = item;
+                                items.push(item);
+                            }
+                        }
+                    }
+                }
+                return items;
+            }
+            function merge(target, source) {
+                ts.addRange(target.spans, source.spans);
+                if (source.childItems) {
+                    if (!target.childItems) {
+                        target.childItems = [];
+                    }
+                    outer: for (var _i = 0, _a = source.childItems; _i < _a.length; _i++) {
+                        var sourceChild = _a[_i];
+                        for (var _b = 0, _c = target.childItems; _b < _c.length; _b++) {
+                            var targetChild = _c[_b];
+                            if (targetChild.text === sourceChild.text && targetChild.kind === sourceChild.kind) {
+                                merge(targetChild, sourceChild);
+                                continue outer;
+                            }
+                        }
+                        target.childItems.push(sourceChild);
+                    }
+                }
+            }
+            function createChildItem(node) {
+                switch (node.kind) {
+                    case 142:
+                        if (ts.isBindingPattern(node.name)) {
+                            break;
+                        }
+                        if ((node.flags & 1023) === 0) {
+                            return undefined;
+                        }
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 147:
+                    case 146:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberFunctionElement);
+                    case 149:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberGetAccessorElement);
+                    case 150:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberSetAccessorElement);
+                    case 153:
+                        return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
+                    case 224:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.enumElement);
+                    case 255:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 225:
+                        return createItem(node, getModuleName(node), ts.ScriptElementKind.moduleElement);
+                    case 222:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.interfaceElement);
+                    case 223:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.typeElement);
+                    case 151:
+                        return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
+                    case 152:
+                        return createItem(node, "new()", ts.ScriptElementKind.constructSignatureElement);
+                    case 145:
+                    case 144:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 221:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.classElement);
+                    case 220:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.functionElement);
+                    case 218:
+                    case 169:
+                        var variableDeclarationNode = void 0;
+                        var name_36;
+                        if (node.kind === 169) {
+                            name_36 = node.name;
+                            variableDeclarationNode = node;
+                            while (variableDeclarationNode && variableDeclarationNode.kind !== 218) {
+                                variableDeclarationNode = variableDeclarationNode.parent;
+                            }
+                            ts.Debug.assert(variableDeclarationNode !== undefined);
+                        }
+                        else {
+                            ts.Debug.assert(!ts.isBindingPattern(node.name));
+                            variableDeclarationNode = node;
+                            name_36 = node.name;
+                        }
+                        if (ts.isConst(variableDeclarationNode)) {
+                            return createItem(node, getTextOfNode(name_36), ts.ScriptElementKind.constElement);
+                        }
+                        else if (ts.isLet(variableDeclarationNode)) {
+                            return createItem(node, getTextOfNode(name_36), ts.ScriptElementKind.letElement);
+                        }
+                        else {
+                            return createItem(node, getTextOfNode(name_36), ts.ScriptElementKind.variableElement);
+                        }
+                    case 148:
+                        return createItem(node, "constructor", ts.ScriptElementKind.constructorImplementationElement);
+                    case 238:
+                    case 234:
+                    case 229:
+                    case 231:
+                    case 232:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.alias);
+                }
+                return undefined;
+                function createItem(node, name, scriptElementKind) {
+                    return getNavigationBarItem(name, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)]);
+                }
+            }
+            function isEmpty(text) {
+                return !text || text.trim() === "";
+            }
+            function getNavigationBarItem(text, kind, kindModifiers, spans, childItems, indent) {
+                if (childItems === void 0) { childItems = []; }
+                if (indent === void 0) { indent = 0; }
+                if (isEmpty(text)) {
+                    return undefined;
+                }
+                return {
+                    text: text,
+                    kind: kind,
+                    kindModifiers: kindModifiers,
+                    spans: spans,
+                    childItems: childItems,
+                    indent: indent,
+                    bolded: false,
+                    grayed: false
+                };
+            }
+            function createTopLevelItem(node) {
+                switch (node.kind) {
+                    case 256:
+                        return createSourceFileItem(node);
+                    case 221:
+                        return createClassItem(node);
+                    case 147:
+                    case 148:
+                        return createMemberFunctionLikeItem(node);
+                    case 224:
+                        return createEnumItem(node);
+                    case 222:
+                        return createInterfaceItem(node);
+                    case 225:
+                        return createModuleItem(node);
+                    case 220:
+                        return createFunctionItem(node);
+                    case 223:
+                        return createTypeAliasItem(node);
+                }
+                return undefined;
+                function createModuleItem(node) {
+                    var moduleName = getModuleName(node);
+                    var childItems = getItemsWorker(getChildNodes(getInnermostModule(node).body.statements), createChildItem);
+                    return getNavigationBarItem(moduleName, ts.ScriptElementKind.moduleElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+                function createFunctionItem(node) {
+                    if (node.body && node.body.kind === 199) {
+                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
+                        return getNavigationBarItem(!node.name ? "default" : node.name.text, ts.ScriptElementKind.functionElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                    }
+                    return undefined;
+                }
+                function createTypeAliasItem(node) {
+                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.typeElement, ts.getNodeModifiers(node), [getNodeSpan(node)], [], getIndent(node));
+                }
+                function createMemberFunctionLikeItem(node) {
+                    if (node.body && node.body.kind === 199) {
+                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
+                        var scriptElementKind = void 0;
+                        var memberFunctionName = void 0;
+                        if (node.kind === 147) {
+                            memberFunctionName = ts.getPropertyNameForPropertyNameNode(node.name);
+                            scriptElementKind = ts.ScriptElementKind.memberFunctionElement;
+                        }
+                        else {
+                            memberFunctionName = "constructor";
+                            scriptElementKind = ts.ScriptElementKind.constructorImplementationElement;
+                        }
+                        return getNavigationBarItem(memberFunctionName, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                    }
+                    return undefined;
+                }
+                function createSourceFileItem(node) {
+                    var childItems = getItemsWorker(getChildNodes(node.statements), createChildItem);
+                    var rootName = ts.isExternalModule(node)
+                        ? "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(node.fileName)))) + "\""
+                        : "<global>";
+                    return getNavigationBarItem(rootName, ts.ScriptElementKind.moduleElement, ts.ScriptElementKindModifier.none, [getNodeSpan(node)], childItems);
+                }
+                function createClassItem(node) {
+                    var childItems;
+                    if (node.members) {
+                        var constructor = ts.forEach(node.members, function (member) {
+                            return member.kind === 148 && member;
+                        });
+                        var nodes = removeDynamicallyNamedProperties(node);
+                        if (constructor) {
+                            ts.addRange(nodes, ts.filter(constructor.parameters, function (p) { return !ts.isBindingPattern(p.name); }));
+                        }
+                        childItems = getItemsWorker(sortNodes(nodes), createChildItem);
+                    }
+                    var nodeName = !node.name ? "default" : node.name.text;
+                    return getNavigationBarItem(nodeName, ts.ScriptElementKind.classElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+                function createEnumItem(node) {
+                    var childItems = getItemsWorker(sortNodes(removeComputedProperties(node)), createChildItem);
+                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.enumElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+                function createInterfaceItem(node) {
+                    var childItems = getItemsWorker(sortNodes(removeDynamicallyNamedProperties(node)), createChildItem);
+                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.interfaceElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+            }
+            function getModuleName(moduleDeclaration) {
+                if (ts.isAmbientModule(moduleDeclaration)) {
+                    return getTextOfNode(moduleDeclaration.name);
+                }
+                var result = [];
+                result.push(moduleDeclaration.name.text);
+                while (moduleDeclaration.body && moduleDeclaration.body.kind === 225) {
+                    moduleDeclaration = moduleDeclaration.body;
+                    result.push(moduleDeclaration.name.text);
+                }
+                return result.join(".");
+            }
+            function removeComputedProperties(node) {
+                return ts.filter(node.members, function (member) { return member.name === undefined || member.name.kind !== 140; });
+            }
+            function removeDynamicallyNamedProperties(node) {
+                return ts.filter(node.members, function (member) { return !ts.hasDynamicName(member); });
+            }
+            function getInnermostModule(node) {
+                while (node.body.kind === 225) {
+                    node = node.body;
+                }
+                return node;
+            }
+            function getNodeSpan(node) {
+                return node.kind === 256
+                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
+                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
+            }
+            function getTextOfNode(node) {
+                return ts.getTextOfNodeFromSourceText(sourceFile.text, node);
+            }
+        }
+        NavigationBar.getNavigationBarItems = getNavigationBarItems;
+        function getJsNavigationBarItems(sourceFile, compilerOptions) {
+            var anonFnText = "<function>";
+            var anonClassText = "<class>";
+            var indent = 0;
+            var rootName = ts.isExternalModule(sourceFile) ?
+                "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(sourceFile.fileName)))) + "\""
+                : "<global>";
+            var sourceFileItem = getNavBarItem(rootName, ts.ScriptElementKind.moduleElement, [getNodeSpan(sourceFile)]);
+            var topItem = sourceFileItem;
+            ts.forEachChild(sourceFile, visitNode);
+            function visitNode(node) {
+                var newItem = createNavBarItem(node);
+                if (newItem) {
+                    topItem.childItems.push(newItem);
+                }
+                if (node.jsDocComments && node.jsDocComments.length > 0) {
+                    for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        visitNode(jsDocComment);
+                    }
+                }
+                if (newItem && (ts.isFunctionLike(node) || ts.isClassLike(node))) {
+                    var lastTop = topItem;
+                    indent++;
+                    topItem = newItem;
+                    ts.forEachChild(node, visitNode);
+                    topItem = lastTop;
+                    indent--;
+                    if (newItem && newItem.text === anonFnText && newItem.childItems.length === 0) {
+                        topItem.childItems.pop();
+                    }
+                }
+                else {
+                    ts.forEachChild(node, visitNode);
+                }
+            }
+            function createNavBarItem(node) {
+                switch (node.kind) {
+                    case 218:
+                        if (node.parent.parent
+                            .parent.kind !== 256) {
+                            return undefined;
+                        }
+                        var varDecl = node;
+                        if (varDecl.initializer && (varDecl.initializer.kind === 179 ||
+                            varDecl.initializer.kind === 180 ||
+                            varDecl.initializer.kind === 192)) {
+                            return undefined;
+                        }
+                    case 220:
+                    case 221:
+                    case 148:
+                    case 149:
+                    case 150:
+                        var name_37 = node.flags && (node.flags & 512) && !node.name ? "default" :
+                            node.kind === 148 ? "constructor" :
+                                ts.declarationNameToString(node.name);
+                        return getNavBarItem(name_37, getScriptKindForElementKind(node.kind), [getNodeSpan(node)]);
+                    case 179:
+                    case 180:
+                    case 192:
+                        return getDefineModuleItem(node) || getFunctionOrClassExpressionItem(node);
+                    case 147:
+                        var methodDecl = node;
+                        return getNavBarItem(ts.declarationNameToString(methodDecl.name), ts.ScriptElementKind.memberFunctionElement, [getNodeSpan(node)]);
+                    case 235:
+                        return getNavBarItem("default", ts.ScriptElementKind.variableElement, [getNodeSpan(node)]);
+                    case 231:
+                        if (!node.name) {
+                            return undefined;
+                        }
+                    case 234:
+                    case 232:
+                    case 238:
+                        if (node.kind === 238) {
+                            if (!node.parent.parent.moduleSpecifier && !node.propertyName) {
+                                return undefined;
+                            }
+                        }
+                        var decl = node;
+                        if (!decl.name) {
+                            return undefined;
+                        }
+                        var declName = ts.declarationNameToString(decl.name);
+                        return getNavBarItem(declName, ts.ScriptElementKind.constElement, [getNodeSpan(node)]);
+                    case 279:
+                        if (node.name) {
+                            return getNavBarItem(node.name.text, ts.ScriptElementKind.typeElement, [getNodeSpan(node)]);
+                        }
+                        else {
+                            var parentNode = node.parent && node.parent.parent;
+                            if (parentNode && parentNode.kind === 200) {
+                                if (parentNode.declarationList.declarations.length > 0) {
+                                    var nameIdentifier = parentNode.declarationList.declarations[0].name;
+                                    if (nameIdentifier.kind === 69) {
+                                        return getNavBarItem(nameIdentifier.text, ts.ScriptElementKind.typeElement, [getNodeSpan(node)]);
+                                    }
+                                }
+                            }
+                        }
+                    default:
+                        return undefined;
+                }
+            }
+            function getNavBarItem(text, kind, spans, kindModifiers) {
+                if (kindModifiers === void 0) { kindModifiers = ts.ScriptElementKindModifier.none; }
+                return {
+                    text: text, kind: kind, kindModifiers: kindModifiers, spans: spans, childItems: [], indent: indent, bolded: false, grayed: false
+                };
+            }
+            function getDefineModuleItem(node) {
+                if (node.kind !== 179 && node.kind !== 180) {
+                    return undefined;
+                }
+                if (node.parent.kind !== 174) {
+                    return undefined;
+                }
+                var callExpr = node.parent;
+                if (callExpr.expression.kind !== 69 || callExpr.expression.getText() !== "define") {
+                    return undefined;
+                }
+                var defaultName = node.getSourceFile().fileName;
+                if (callExpr.arguments[0].kind === 9) {
+                    defaultName = (callExpr.arguments[0]).text;
+                }
+                return getNavBarItem(defaultName, ts.ScriptElementKind.moduleElement, [getNodeSpan(node.parent)]);
+            }
+            function getFunctionOrClassExpressionItem(node) {
+                if (node.kind !== 179 &&
+                    node.kind !== 180 &&
+                    node.kind !== 192) {
+                    return undefined;
+                }
+                var fnExpr = node;
+                var fnName;
+                if (fnExpr.name && ts.getFullWidth(fnExpr.name) > 0) {
+                    fnName = ts.declarationNameToString(fnExpr.name);
+                }
+                else {
+                    if (fnExpr.parent.kind === 218) {
+                        fnName = ts.declarationNameToString(fnExpr.parent.name);
+                    }
+                    else if (fnExpr.parent.kind === 187 &&
+                        fnExpr.parent.operatorToken.kind === 56) {
+                        fnName = fnExpr.parent.left.getText();
+                    }
+                    else if (fnExpr.parent.kind === 253 &&
+                        fnExpr.parent.name) {
+                        fnName = fnExpr.parent.name.getText();
+                    }
+                    else {
+                        fnName = node.kind === 192 ? anonClassText : anonFnText;
+                    }
+                }
+                var scriptKind = node.kind === 192 ? ts.ScriptElementKind.classElement : ts.ScriptElementKind.functionElement;
+                return getNavBarItem(fnName, scriptKind, [getNodeSpan(node)]);
+            }
+            function getNodeSpan(node) {
+                return node.kind === 256
+                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
+                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
+            }
+            function getScriptKindForElementKind(kind) {
+                switch (kind) {
+                    case 218:
+                        return ts.ScriptElementKind.variableElement;
+                    case 220:
+                        return ts.ScriptElementKind.functionElement;
+                    case 221:
+                        return ts.ScriptElementKind.classElement;
+                    case 148:
+                        return ts.ScriptElementKind.constructorImplementationElement;
+                    case 149:
+                        return ts.ScriptElementKind.memberGetAccessorElement;
+                    case 150:
+                        return ts.ScriptElementKind.memberSetAccessorElement;
+                    default:
+                        return "unknown";
+                }
+            }
+            return sourceFileItem.childItems;
+        }
+        NavigationBar.getJsNavigationBarItems = getJsNavigationBarItems;
+    })(NavigationBar = ts.NavigationBar || (ts.NavigationBar = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    (function (PatternMatchKind) {
+        PatternMatchKind[PatternMatchKind["exact"] = 0] = "exact";
+        PatternMatchKind[PatternMatchKind["prefix"] = 1] = "prefix";
+        PatternMatchKind[PatternMatchKind["substring"] = 2] = "substring";
+        PatternMatchKind[PatternMatchKind["camelCase"] = 3] = "camelCase";
+    })(ts.PatternMatchKind || (ts.PatternMatchKind = {}));
+    var PatternMatchKind = ts.PatternMatchKind;
+    function createPatternMatch(kind, punctuationStripped, isCaseSensitive, camelCaseWeight) {
+        return {
+            kind: kind,
+            punctuationStripped: punctuationStripped,
+            isCaseSensitive: isCaseSensitive,
+            camelCaseWeight: camelCaseWeight
+        };
+    }
+    function createPatternMatcher(pattern) {
+        var stringToWordSpans = {};
+        pattern = pattern.trim();
+        var dotSeparatedSegments = pattern.split(".").map(function (p) { return createSegment(p.trim()); });
+        var invalidPattern = dotSeparatedSegments.length === 0 || ts.forEach(dotSeparatedSegments, segmentIsInvalid);
+        return {
+            getMatches: getMatches,
+            getMatchesForLastSegmentOfPattern: getMatchesForLastSegmentOfPattern,
+            patternContainsDots: dotSeparatedSegments.length > 1
+        };
+        function skipMatch(candidate) {
+            return invalidPattern || !candidate;
+        }
+        function getMatchesForLastSegmentOfPattern(candidate) {
+            if (skipMatch(candidate)) {
+                return undefined;
+            }
+            return matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
+        }
+        function getMatches(candidateContainers, candidate) {
+            if (skipMatch(candidate)) {
+                return undefined;
+            }
+            var candidateMatch = matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
+            if (!candidateMatch) {
+                return undefined;
+            }
+            candidateContainers = candidateContainers || [];
+            if (dotSeparatedSegments.length - 1 > candidateContainers.length) {
+                return undefined;
+            }
+            var totalMatch = candidateMatch;
+            for (var i = dotSeparatedSegments.length - 2, j = candidateContainers.length - 1; i >= 0; i -= 1, j -= 1) {
+                var segment = dotSeparatedSegments[i];
+                var containerName = candidateContainers[j];
+                var containerMatch = matchSegment(containerName, segment);
+                if (!containerMatch) {
+                    return undefined;
+                }
+                ts.addRange(totalMatch, containerMatch);
+            }
+            return totalMatch;
+        }
+        function getWordSpans(word) {
+            if (!ts.hasProperty(stringToWordSpans, word)) {
+                stringToWordSpans[word] = breakIntoWordSpans(word);
+            }
+            return stringToWordSpans[word];
+        }
+        function matchTextChunk(candidate, chunk, punctuationStripped) {
+            var index = indexOfIgnoringCase(candidate, chunk.textLowerCase);
+            if (index === 0) {
+                if (chunk.text.length === candidate.length) {
+                    return createPatternMatch(PatternMatchKind.exact, punctuationStripped, candidate === chunk.text);
+                }
+                else {
+                    return createPatternMatch(PatternMatchKind.prefix, punctuationStripped, startsWith(candidate, chunk.text));
+                }
+            }
+            var isLowercase = chunk.isLowerCase;
+            if (isLowercase) {
+                if (index > 0) {
+                    var wordSpans = getWordSpans(candidate);
+                    for (var _i = 0, wordSpans_1 = wordSpans; _i < wordSpans_1.length; _i++) {
+                        var span = wordSpans_1[_i];
+                        if (partStartsWith(candidate, span, chunk.text, true)) {
+                            return createPatternMatch(PatternMatchKind.substring, punctuationStripped, partStartsWith(candidate, span, chunk.text, false));
+                        }
+                    }
+                }
+            }
+            else {
+                if (candidate.indexOf(chunk.text) > 0) {
+                    return createPatternMatch(PatternMatchKind.substring, punctuationStripped, true);
+                }
+            }
+            if (!isLowercase) {
+                if (chunk.characterSpans.length > 0) {
+                    var candidateParts = getWordSpans(candidate);
+                    var camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, false);
+                    if (camelCaseWeight !== undefined) {
+                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, true, camelCaseWeight);
+                    }
+                    camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, true);
+                    if (camelCaseWeight !== undefined) {
+                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, false, camelCaseWeight);
+                    }
+                }
+            }
+            if (isLowercase) {
+                if (chunk.text.length < candidate.length) {
+                    if (index > 0 && isUpperCaseLetter(candidate.charCodeAt(index))) {
+                        return createPatternMatch(PatternMatchKind.substring, punctuationStripped, false);
+                    }
+                }
+            }
+            return undefined;
+        }
+        function containsSpaceOrAsterisk(text) {
+            for (var i = 0; i < text.length; i++) {
+                var ch = text.charCodeAt(i);
+                if (ch === 32 || ch === 42) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function matchSegment(candidate, segment) {
+            if (!containsSpaceOrAsterisk(segment.totalTextChunk.text)) {
+                var match = matchTextChunk(candidate, segment.totalTextChunk, false);
+                if (match) {
+                    return [match];
+                }
+            }
+            var subWordTextChunks = segment.subWordTextChunks;
+            var matches = undefined;
+            for (var _i = 0, subWordTextChunks_1 = subWordTextChunks; _i < subWordTextChunks_1.length; _i++) {
+                var subWordTextChunk = subWordTextChunks_1[_i];
+                var result = matchTextChunk(candidate, subWordTextChunk, true);
+                if (!result) {
+                    return undefined;
+                }
+                matches = matches || [];
+                matches.push(result);
+            }
+            return matches;
+        }
+        function partStartsWith(candidate, candidateSpan, pattern, ignoreCase, patternSpan) {
+            var patternPartStart = patternSpan ? patternSpan.start : 0;
+            var patternPartLength = patternSpan ? patternSpan.length : pattern.length;
+            if (patternPartLength > candidateSpan.length) {
+                return false;
+            }
+            if (ignoreCase) {
+                for (var i = 0; i < patternPartLength; i++) {
+                    var ch1 = pattern.charCodeAt(patternPartStart + i);
+                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
+                    if (toLowerCase(ch1) !== toLowerCase(ch2)) {
+                        return false;
+                    }
+                }
+            }
+            else {
+                for (var i = 0; i < patternPartLength; i++) {
+                    var ch1 = pattern.charCodeAt(patternPartStart + i);
+                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
+                    if (ch1 !== ch2) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function tryCamelCaseMatch(candidate, candidateParts, chunk, ignoreCase) {
+            var chunkCharacterSpans = chunk.characterSpans;
+            var currentCandidate = 0;
+            var currentChunkSpan = 0;
+            var firstMatch = undefined;
+            var contiguous = undefined;
+            while (true) {
+                if (currentChunkSpan === chunkCharacterSpans.length) {
+                    var weight = 0;
+                    if (contiguous) {
+                        weight += 1;
+                    }
+                    if (firstMatch === 0) {
+                        weight += 2;
+                    }
+                    return weight;
+                }
+                else if (currentCandidate === candidateParts.length) {
+                    return undefined;
+                }
+                var candidatePart = candidateParts[currentCandidate];
+                var gotOneMatchThisCandidate = false;
+                for (; currentChunkSpan < chunkCharacterSpans.length; currentChunkSpan++) {
+                    var chunkCharacterSpan = chunkCharacterSpans[currentChunkSpan];
+                    if (gotOneMatchThisCandidate) {
+                        if (!isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan - 1].start)) ||
+                            !isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan].start))) {
+                            break;
+                        }
+                    }
+                    if (!partStartsWith(candidate, candidatePart, chunk.text, ignoreCase, chunkCharacterSpan)) {
+                        break;
+                    }
+                    gotOneMatchThisCandidate = true;
+                    firstMatch = firstMatch === undefined ? currentCandidate : firstMatch;
+                    contiguous = contiguous === undefined ? true : contiguous;
+                    candidatePart = ts.createTextSpan(candidatePart.start + chunkCharacterSpan.length, candidatePart.length - chunkCharacterSpan.length);
+                }
+                if (!gotOneMatchThisCandidate && contiguous !== undefined) {
+                    contiguous = false;
+                }
+                currentCandidate++;
+            }
+        }
+    }
+    ts.createPatternMatcher = createPatternMatcher;
+    function createSegment(text) {
+        return {
+            totalTextChunk: createTextChunk(text),
+            subWordTextChunks: breakPatternIntoTextChunks(text)
+        };
+    }
+    function segmentIsInvalid(segment) {
+        return segment.subWordTextChunks.length === 0;
+    }
+    function isUpperCaseLetter(ch) {
+        if (ch >= 65 && ch <= 90) {
+            return true;
+        }
+        if (ch < 127 || !ts.isUnicodeIdentifierStart(ch, 2)) {
+            return false;
+        }
+        var str = String.fromCharCode(ch);
+        return str === str.toUpperCase();
+    }
+    function isLowerCaseLetter(ch) {
+        if (ch >= 97 && ch <= 122) {
+            return true;
+        }
+        if (ch < 127 || !ts.isUnicodeIdentifierStart(ch, 2)) {
+            return false;
+        }
+        var str = String.fromCharCode(ch);
+        return str === str.toLowerCase();
+    }
+    function startsWith(string, search) {
+        for (var i = 0, n = search.length; i < n; i++) {
+            if (string.charCodeAt(i) !== search.charCodeAt(i)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function indexOfIgnoringCase(string, value) {
+        for (var i = 0, n = string.length - value.length; i <= n; i++) {
+            if (startsWithIgnoringCase(string, value, i)) {
+                return i;
+            }
+        }
+        return -1;
+    }
+    function startsWithIgnoringCase(string, value, start) {
+        for (var i = 0, n = value.length; i < n; i++) {
+            var ch1 = toLowerCase(string.charCodeAt(i + start));
+            var ch2 = value.charCodeAt(i);
+            if (ch1 !== ch2) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function toLowerCase(ch) {
+        if (ch >= 65 && ch <= 90) {
+            return 97 + (ch - 65);
+        }
+        if (ch < 127) {
+            return ch;
+        }
+        return String.fromCharCode(ch).toLowerCase().charCodeAt(0);
+    }
+    function isDigit(ch) {
+        return ch >= 48 && ch <= 57;
+    }
+    function isWordChar(ch) {
+        return isUpperCaseLetter(ch) || isLowerCaseLetter(ch) || isDigit(ch) || ch === 95 || ch === 36;
+    }
+    function breakPatternIntoTextChunks(pattern) {
+        var result = [];
+        var wordStart = 0;
+        var wordLength = 0;
+        for (var i = 0; i < pattern.length; i++) {
+            var ch = pattern.charCodeAt(i);
+            if (isWordChar(ch)) {
+                if (wordLength === 0) {
+                    wordStart = i;
+                }
+                wordLength++;
+            }
+            else {
+                if (wordLength > 0) {
+                    result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
+                    wordLength = 0;
+                }
+            }
+        }
+        if (wordLength > 0) {
+            result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
+        }
+        return result;
+    }
+    function createTextChunk(text) {
+        var textLowerCase = text.toLowerCase();
+        return {
+            text: text,
+            textLowerCase: textLowerCase,
+            isLowerCase: text === textLowerCase,
+            characterSpans: breakIntoCharacterSpans(text)
+        };
+    }
+    function breakIntoCharacterSpans(identifier) {
+        return breakIntoSpans(identifier, false);
+    }
+    ts.breakIntoCharacterSpans = breakIntoCharacterSpans;
+    function breakIntoWordSpans(identifier) {
+        return breakIntoSpans(identifier, true);
+    }
+    ts.breakIntoWordSpans = breakIntoWordSpans;
+    function breakIntoSpans(identifier, word) {
+        var result = [];
+        var wordStart = 0;
+        for (var i = 1, n = identifier.length; i < n; i++) {
+            var lastIsDigit = isDigit(identifier.charCodeAt(i - 1));
+            var currentIsDigit = isDigit(identifier.charCodeAt(i));
+            var hasTransitionFromLowerToUpper = transitionFromLowerToUpper(identifier, word, i);
+            var hasTransitionFromUpperToLower = transitionFromUpperToLower(identifier, word, i, wordStart);
+            if (charIsPunctuation(identifier.charCodeAt(i - 1)) ||
+                charIsPunctuation(identifier.charCodeAt(i)) ||
+                lastIsDigit !== currentIsDigit ||
+                hasTransitionFromLowerToUpper ||
+                hasTransitionFromUpperToLower) {
+                if (!isAllPunctuation(identifier, wordStart, i)) {
+                    result.push(ts.createTextSpan(wordStart, i - wordStart));
+                }
+                wordStart = i;
+            }
+        }
+        if (!isAllPunctuation(identifier, wordStart, identifier.length)) {
+            result.push(ts.createTextSpan(wordStart, identifier.length - wordStart));
+        }
+        return result;
+    }
+    function charIsPunctuation(ch) {
+        switch (ch) {
+            case 33:
+            case 34:
+            case 35:
+            case 37:
+            case 38:
+            case 39:
+            case 40:
+            case 41:
+            case 42:
+            case 44:
+            case 45:
+            case 46:
+            case 47:
+            case 58:
+            case 59:
+            case 63:
+            case 64:
+            case 91:
+            case 92:
+            case 93:
+            case 95:
+            case 123:
+            case 125:
+                return true;
+        }
+        return false;
+    }
+    function isAllPunctuation(identifier, start, end) {
+        for (var i = start; i < end; i++) {
+            var ch = identifier.charCodeAt(i);
+            if (!charIsPunctuation(ch) || ch === 95 || ch === 36) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function transitionFromUpperToLower(identifier, word, index, wordStart) {
+        if (word) {
+            if (index !== wordStart &&
+                index + 1 < identifier.length) {
+                var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
+                var nextIsLower = isLowerCaseLetter(identifier.charCodeAt(index + 1));
+                if (currentIsUpper && nextIsLower) {
+                    for (var i = wordStart; i < index; i++) {
+                        if (!isUpperCaseLetter(identifier.charCodeAt(i))) {
+                            return false;
+                        }
+                    }
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+    function transitionFromLowerToUpper(identifier, word, index) {
+        var lastIsUpper = isUpperCaseLetter(identifier.charCodeAt(index - 1));
+        var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
+        var transition = word
+            ? (currentIsUpper && !lastIsUpper)
+            : currentIsUpper;
+        return transition;
+    }
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var SignatureHelp;
+    (function (SignatureHelp) {
+        var emptyArray = [];
+        function getSignatureHelpItems(program, sourceFile, position, cancellationToken) {
+            var typeChecker = program.getTypeChecker();
+            var startingToken = ts.findTokenOnLeftOfPosition(sourceFile, position);
+            if (!startingToken) {
+                return undefined;
+            }
+            var argumentInfo = getContainingArgumentInfo(startingToken, position, sourceFile);
+            cancellationToken.throwIfCancellationRequested();
+            if (!argumentInfo) {
+                return undefined;
+            }
+            var call = argumentInfo.invocation;
+            var candidates = [];
+            var resolvedSignature = typeChecker.getResolvedSignature(call, candidates);
+            cancellationToken.throwIfCancellationRequested();
+            if (!candidates.length) {
+                if (ts.isSourceFileJavaScript(sourceFile)) {
+                    return createJavaScriptSignatureHelpItems(argumentInfo, program);
+                }
+                return undefined;
+            }
+            return createSignatureHelpItems(candidates, resolvedSignature, argumentInfo, typeChecker);
+        }
+        SignatureHelp.getSignatureHelpItems = getSignatureHelpItems;
+        function createJavaScriptSignatureHelpItems(argumentInfo, program) {
+            if (argumentInfo.invocation.kind !== 174) {
+                return undefined;
+            }
+            var callExpression = argumentInfo.invocation;
+            var expression = callExpression.expression;
+            var name = expression.kind === 69
+                ? expression
+                : expression.kind === 172
+                    ? expression.name
+                    : undefined;
+            if (!name || !name.text) {
+                return undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            for (var _i = 0, _a = program.getSourceFiles(); _i < _a.length; _i++) {
+                var sourceFile = _a[_i];
+                var nameToDeclarations = sourceFile.getNamedDeclarations();
+                var declarations = ts.getProperty(nameToDeclarations, name.text);
+                if (declarations) {
+                    for (var _b = 0, declarations_8 = declarations; _b < declarations_8.length; _b++) {
+                        var declaration = declarations_8[_b];
+                        var symbol = declaration.symbol;
+                        if (symbol) {
+                            var type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
+                            if (type) {
+                                var callSignatures = type.getCallSignatures();
+                                if (callSignatures && callSignatures.length) {
+                                    return createSignatureHelpItems(callSignatures, callSignatures[0], argumentInfo, typeChecker);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        function getImmediatelyContainingArgumentInfo(node, position, sourceFile) {
+            if (node.parent.kind === 174 || node.parent.kind === 175) {
+                var callExpression = node.parent;
+                if (node.kind === 25 ||
+                    node.kind === 17) {
+                    var list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
+                    var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
+                    ts.Debug.assert(list !== undefined);
+                    return {
+                        kind: isTypeArgList ? 0 : 1,
+                        invocation: callExpression,
+                        argumentsSpan: getApplicableSpanForArguments(list, sourceFile),
+                        argumentIndex: 0,
+                        argumentCount: getArgumentCount(list)
+                    };
+                }
+                var listItemInfo = ts.findListItemInfo(node);
+                if (listItemInfo) {
+                    var list = listItemInfo.list;
+                    var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
+                    var argumentIndex = getArgumentIndex(list, node);
+                    var argumentCount = getArgumentCount(list);
+                    ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
+                    return {
+                        kind: isTypeArgList ? 0 : 1,
+                        invocation: callExpression,
+                        argumentsSpan: getApplicableSpanForArguments(list, sourceFile),
+                        argumentIndex: argumentIndex,
+                        argumentCount: argumentCount
+                    };
+                }
+                return undefined;
+            }
+            else if (node.kind === 11 && node.parent.kind === 176) {
+                if (ts.isInsideTemplateLiteral(node, position)) {
+                    return getArgumentListInfoForTemplate(node.parent, 0, sourceFile);
+                }
+            }
+            else if (node.kind === 12 && node.parent.parent.kind === 176) {
+                var templateExpression = node.parent;
+                var tagExpression = templateExpression.parent;
+                ts.Debug.assert(templateExpression.kind === 189);
+                var argumentIndex = ts.isInsideTemplateLiteral(node, position) ? 0 : 1;
+                return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
+            }
+            else if (node.parent.kind === 197 && node.parent.parent.parent.kind === 176) {
+                var templateSpan = node.parent;
+                var templateExpression = templateSpan.parent;
+                var tagExpression = templateExpression.parent;
+                ts.Debug.assert(templateExpression.kind === 189);
+                if (node.kind === 14 && !ts.isInsideTemplateLiteral(node, position)) {
+                    return undefined;
+                }
+                var spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
+                var argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node, position);
+                return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
+            }
+            return undefined;
+        }
+        function getArgumentIndex(argumentsList, node) {
+            var argumentIndex = 0;
+            var listChildren = argumentsList.getChildren();
+            for (var _i = 0, listChildren_1 = listChildren; _i < listChildren_1.length; _i++) {
+                var child = listChildren_1[_i];
+                if (child === node) {
+                    break;
+                }
+                if (child.kind !== 24) {
+                    argumentIndex++;
+                }
+            }
+            return argumentIndex;
+        }
+        function getArgumentCount(argumentsList) {
+            var listChildren = argumentsList.getChildren();
+            var argumentCount = ts.countWhere(listChildren, function (arg) { return arg.kind !== 24; });
+            if (listChildren.length > 0 && ts.lastOrUndefined(listChildren).kind === 24) {
+                argumentCount++;
+            }
+            return argumentCount;
+        }
+        function getArgumentIndexForTemplatePiece(spanIndex, node, position) {
+            ts.Debug.assert(position >= node.getStart(), "Assumed 'position' could not occur before node.");
+            if (ts.isTemplateLiteralKind(node.kind)) {
+                if (ts.isInsideTemplateLiteral(node, position)) {
+                    return 0;
+                }
+                return spanIndex + 2;
+            }
+            return spanIndex + 1;
+        }
+        function getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile) {
+            var argumentCount = tagExpression.template.kind === 11
+                ? 1
+                : tagExpression.template.templateSpans.length + 1;
+            ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
+            return {
+                kind: 2,
+                invocation: tagExpression,
+                argumentsSpan: getApplicableSpanForTaggedTemplate(tagExpression, sourceFile),
+                argumentIndex: argumentIndex,
+                argumentCount: argumentCount
+            };
+        }
+        function getApplicableSpanForArguments(argumentsList, sourceFile) {
+            var applicableSpanStart = argumentsList.getFullStart();
+            var applicableSpanEnd = ts.skipTrivia(sourceFile.text, argumentsList.getEnd(), false);
+            return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
+        }
+        function getApplicableSpanForTaggedTemplate(taggedTemplate, sourceFile) {
+            var template = taggedTemplate.template;
+            var applicableSpanStart = template.getStart();
+            var applicableSpanEnd = template.getEnd();
+            if (template.kind === 189) {
+                var lastSpan = ts.lastOrUndefined(template.templateSpans);
+                if (lastSpan.literal.getFullWidth() === 0) {
+                    applicableSpanEnd = ts.skipTrivia(sourceFile.text, applicableSpanEnd, false);
+                }
+            }
+            return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
+        }
+        function getContainingArgumentInfo(node, position, sourceFile) {
+            for (var n = node; n.kind !== 256; n = n.parent) {
+                if (ts.isFunctionBlock(n)) {
+                    return undefined;
+                }
+                if (n.pos < n.parent.pos || n.end > n.parent.end) {
+                    ts.Debug.fail("Node of kind " + n.kind + " is not a subspan of its parent of kind " + n.parent.kind);
+                }
+                var argumentInfo = getImmediatelyContainingArgumentInfo(n, position, sourceFile);
+                if (argumentInfo) {
+                    return argumentInfo;
+                }
+            }
+            return undefined;
+        }
+        SignatureHelp.getContainingArgumentInfo = getContainingArgumentInfo;
+        function getChildListThatStartsWithOpenerToken(parent, openerToken, sourceFile) {
+            var children = parent.getChildren(sourceFile);
+            var indexOfOpenerToken = children.indexOf(openerToken);
+            ts.Debug.assert(indexOfOpenerToken >= 0 && children.length > indexOfOpenerToken + 1);
+            return children[indexOfOpenerToken + 1];
+        }
+        function selectBestInvalidOverloadIndex(candidates, argumentCount) {
+            var maxParamsSignatureIndex = -1;
+            var maxParams = -1;
+            for (var i = 0; i < candidates.length; i++) {
+                var candidate = candidates[i];
+                if (candidate.hasRestParameter || candidate.parameters.length >= argumentCount) {
+                    return i;
+                }
+                if (candidate.parameters.length > maxParams) {
+                    maxParams = candidate.parameters.length;
+                    maxParamsSignatureIndex = i;
+                }
+            }
+            return maxParamsSignatureIndex;
+        }
+        function createSignatureHelpItems(candidates, bestSignature, argumentListInfo, typeChecker) {
+            var applicableSpan = argumentListInfo.argumentsSpan;
+            var isTypeParameterList = argumentListInfo.kind === 0;
+            var invocation = argumentListInfo.invocation;
+            var callTarget = ts.getInvokedExpression(invocation);
+            var callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
+            var callTargetDisplayParts = callTargetSymbol && ts.symbolToDisplayParts(typeChecker, callTargetSymbol, undefined, undefined);
+            var items = ts.map(candidates, function (candidateSignature) {
+                var signatureHelpParameters;
+                var prefixDisplayParts = [];
+                var suffixDisplayParts = [];
+                if (callTargetDisplayParts) {
+                    ts.addRange(prefixDisplayParts, callTargetDisplayParts);
+                }
+                if (isTypeParameterList) {
+                    prefixDisplayParts.push(ts.punctuationPart(25));
+                    var typeParameters = candidateSignature.typeParameters;
+                    signatureHelpParameters = typeParameters && typeParameters.length > 0 ? ts.map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
+                    suffixDisplayParts.push(ts.punctuationPart(27));
+                    var parameterParts = ts.mapToDisplayParts(function (writer) {
+                        return typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisType, candidateSignature.parameters, writer, invocation);
+                    });
+                    ts.addRange(suffixDisplayParts, parameterParts);
+                }
+                else {
+                    var typeParameterParts = ts.mapToDisplayParts(function (writer) {
+                        return typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation);
+                    });
+                    ts.addRange(prefixDisplayParts, typeParameterParts);
+                    prefixDisplayParts.push(ts.punctuationPart(17));
+                    var parameters = candidateSignature.parameters;
+                    signatureHelpParameters = parameters.length > 0 ? ts.map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
+                    suffixDisplayParts.push(ts.punctuationPart(18));
+                }
+                var returnTypeParts = ts.mapToDisplayParts(function (writer) {
+                    return typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation);
+                });
+                ts.addRange(suffixDisplayParts, returnTypeParts);
+                return {
+                    isVariadic: candidateSignature.hasRestParameter,
+                    prefixDisplayParts: prefixDisplayParts,
+                    suffixDisplayParts: suffixDisplayParts,
+                    separatorDisplayParts: [ts.punctuationPart(24), ts.spacePart()],
+                    parameters: signatureHelpParameters,
+                    documentation: candidateSignature.getDocumentationComment()
+                };
+            });
+            var argumentIndex = argumentListInfo.argumentIndex;
+            var argumentCount = argumentListInfo.argumentCount;
+            var selectedItemIndex = candidates.indexOf(bestSignature);
+            if (selectedItemIndex < 0) {
+                selectedItemIndex = selectBestInvalidOverloadIndex(candidates, argumentCount);
+            }
+            ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
+            return {
+                items: items,
+                applicableSpan: applicableSpan,
+                selectedItemIndex: selectedItemIndex,
+                argumentIndex: argumentIndex,
+                argumentCount: argumentCount
+            };
+            function createSignatureHelpParameterForParameter(parameter) {
+                var displayParts = ts.mapToDisplayParts(function (writer) {
+                    return typeChecker.getSymbolDisplayBuilder().buildParameterDisplay(parameter, writer, invocation);
+                });
+                return {
+                    name: parameter.name,
+                    documentation: parameter.getDocumentationComment(),
+                    displayParts: displayParts,
+                    isOptional: typeChecker.isOptionalParameter(parameter.valueDeclaration)
+                };
+            }
+            function createSignatureHelpParameterForTypeParameter(typeParameter) {
+                var displayParts = ts.mapToDisplayParts(function (writer) {
+                    return typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(typeParameter, writer, invocation);
+                });
+                return {
+                    name: typeParameter.symbol.name,
+                    documentation: emptyArray,
+                    displayParts: displayParts,
+                    isOptional: false
+                };
+            }
+        }
+    })(SignatureHelp = ts.SignatureHelp || (ts.SignatureHelp = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getLineStartPositionForPosition(position, sourceFile) {
+        var lineStarts = sourceFile.getLineStarts();
+        var line = sourceFile.getLineAndCharacterOfPosition(position).line;
+        return lineStarts[line];
+    }
+    ts.getLineStartPositionForPosition = getLineStartPositionForPosition;
+    function rangeContainsRange(r1, r2) {
+        return startEndContainsRange(r1.pos, r1.end, r2);
+    }
+    ts.rangeContainsRange = rangeContainsRange;
+    function startEndContainsRange(start, end, range) {
+        return start <= range.pos && end >= range.end;
+    }
+    ts.startEndContainsRange = startEndContainsRange;
+    function rangeContainsStartEnd(range, start, end) {
+        return range.pos <= start && range.end >= end;
+    }
+    ts.rangeContainsStartEnd = rangeContainsStartEnd;
+    function rangeOverlapsWithStartEnd(r1, start, end) {
+        return startEndOverlapsWithStartEnd(r1.pos, r1.end, start, end);
+    }
+    ts.rangeOverlapsWithStartEnd = rangeOverlapsWithStartEnd;
+    function startEndOverlapsWithStartEnd(start1, end1, start2, end2) {
+        var start = Math.max(start1, start2);
+        var end = Math.min(end1, end2);
+        return start < end;
+    }
+    ts.startEndOverlapsWithStartEnd = startEndOverlapsWithStartEnd;
+    function positionBelongsToNode(candidate, position, sourceFile) {
+        return candidate.end > position || !isCompletedNode(candidate, sourceFile);
+    }
+    ts.positionBelongsToNode = positionBelongsToNode;
+    function isCompletedNode(n, sourceFile) {
+        if (ts.nodeIsMissing(n)) {
+            return false;
+        }
+        switch (n.kind) {
+            case 221:
+            case 222:
+            case 224:
+            case 171:
+            case 167:
+            case 159:
+            case 199:
+            case 226:
+            case 227:
+                return nodeEndsWith(n, 16, sourceFile);
+            case 252:
+                return isCompletedNode(n.block, sourceFile);
+            case 175:
+                if (!n.arguments) {
+                    return true;
+                }
+            case 174:
+            case 178:
+            case 164:
+                return nodeEndsWith(n, 18, sourceFile);
+            case 156:
+            case 157:
+                return isCompletedNode(n.type, sourceFile);
+            case 148:
+            case 149:
+            case 150:
+            case 220:
+            case 179:
+            case 147:
+            case 146:
+            case 152:
+            case 151:
+            case 180:
+                if (n.body) {
+                    return isCompletedNode(n.body, sourceFile);
+                }
+                if (n.type) {
+                    return isCompletedNode(n.type, sourceFile);
+                }
+                return hasChildOfKind(n, 18, sourceFile);
+            case 225:
+                return n.body && isCompletedNode(n.body, sourceFile);
+            case 203:
+                if (n.elseStatement) {
+                    return isCompletedNode(n.elseStatement, sourceFile);
+                }
+                return isCompletedNode(n.thenStatement, sourceFile);
+            case 202:
+                return isCompletedNode(n.expression, sourceFile) ||
+                    hasChildOfKind(n, 23);
+            case 170:
+            case 168:
+            case 173:
+            case 140:
+            case 161:
+                return nodeEndsWith(n, 20, sourceFile);
+            case 153:
+                if (n.type) {
+                    return isCompletedNode(n.type, sourceFile);
+                }
+                return hasChildOfKind(n, 20, sourceFile);
+            case 249:
+            case 250:
+                return false;
+            case 206:
+            case 207:
+            case 208:
+            case 205:
+                return isCompletedNode(n.statement, sourceFile);
+            case 204:
+                var hasWhileKeyword = findChildOfKind(n, 104, sourceFile);
+                if (hasWhileKeyword) {
+                    return nodeEndsWith(n, 18, sourceFile);
+                }
+                return isCompletedNode(n.statement, sourceFile);
+            case 158:
+                return isCompletedNode(n.exprName, sourceFile);
+            case 182:
+            case 181:
+            case 183:
+            case 190:
+            case 191:
+                var unaryWordExpression = n;
+                return isCompletedNode(unaryWordExpression.expression, sourceFile);
+            case 176:
+                return isCompletedNode(n.template, sourceFile);
+            case 189:
+                var lastSpan = ts.lastOrUndefined(n.templateSpans);
+                return isCompletedNode(lastSpan, sourceFile);
+            case 197:
+                return ts.nodeIsPresent(n.literal);
+            case 185:
+                return isCompletedNode(n.operand, sourceFile);
+            case 187:
+                return isCompletedNode(n.right, sourceFile);
+            case 188:
+                return isCompletedNode(n.whenFalse, sourceFile);
+            default:
+                return true;
+        }
+    }
+    ts.isCompletedNode = isCompletedNode;
+    function nodeEndsWith(n, expectedLastToken, sourceFile) {
+        var children = n.getChildren(sourceFile);
+        if (children.length) {
+            var last = ts.lastOrUndefined(children);
+            if (last.kind === expectedLastToken) {
+                return true;
+            }
+            else if (last.kind === 23 && children.length !== 1) {
+                return children[children.length - 2].kind === expectedLastToken;
+            }
+        }
+        return false;
+    }
+    function findListItemInfo(node) {
+        var list = findContainingList(node);
+        if (!list) {
+            return undefined;
+        }
+        var children = list.getChildren();
+        var listItemIndex = ts.indexOf(children, node);
+        return {
+            listItemIndex: listItemIndex,
+            list: list
+        };
+    }
+    ts.findListItemInfo = findListItemInfo;
+    function hasChildOfKind(n, kind, sourceFile) {
+        return !!findChildOfKind(n, kind, sourceFile);
+    }
+    ts.hasChildOfKind = hasChildOfKind;
+    function findChildOfKind(n, kind, sourceFile) {
+        return ts.forEach(n.getChildren(sourceFile), function (c) { return c.kind === kind && c; });
+    }
+    ts.findChildOfKind = findChildOfKind;
+    function findContainingList(node) {
+        var syntaxList = ts.forEach(node.parent.getChildren(), function (c) {
+            if (c.kind === 282 && c.pos <= node.pos && c.end >= node.end) {
+                return c;
+            }
+        });
+        ts.Debug.assert(!syntaxList || ts.contains(syntaxList.getChildren(), node));
+        return syntaxList;
+    }
+    ts.findContainingList = findContainingList;
+    function getTouchingWord(sourceFile, position, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTouchingToken(sourceFile, position, function (n) { return isWord(n.kind); }, includeJsDocComment);
+    }
+    ts.getTouchingWord = getTouchingWord;
+    function getTouchingPropertyName(sourceFile, position, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTouchingToken(sourceFile, position, function (n) { return isPropertyName(n.kind); }, includeJsDocComment);
+    }
+    ts.getTouchingPropertyName = getTouchingPropertyName;
+    function getTouchingToken(sourceFile, position, includeItemAtEndPosition, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTokenAtPositionWorker(sourceFile, position, false, includeItemAtEndPosition, includeJsDocComment);
+    }
+    ts.getTouchingToken = getTouchingToken;
+    function getTokenAtPosition(sourceFile, position, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTokenAtPositionWorker(sourceFile, position, true, undefined, includeJsDocComment);
+    }
+    ts.getTokenAtPosition = getTokenAtPosition;
+    function getTokenAtPositionWorker(sourceFile, position, allowPositionInLeadingTrivia, includeItemAtEndPosition, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        var current = sourceFile;
+        outer: while (true) {
+            if (isToken(current)) {
+                return current;
+            }
+            if (includeJsDocComment) {
+                var jsDocChildren = ts.filter(current.getChildren(), ts.isJSDocNode);
+                for (var _i = 0, jsDocChildren_1 = jsDocChildren; _i < jsDocChildren_1.length; _i++) {
+                    var jsDocChild = jsDocChildren_1[_i];
+                    var start = allowPositionInLeadingTrivia ? jsDocChild.getFullStart() : jsDocChild.getStart(sourceFile, includeJsDocComment);
+                    if (start <= position) {
+                        var end = jsDocChild.getEnd();
+                        if (position < end || (position === end && jsDocChild.kind === 1)) {
+                            current = jsDocChild;
+                            continue outer;
+                        }
+                        else if (includeItemAtEndPosition && end === position) {
+                            var previousToken = findPrecedingToken(position, sourceFile, jsDocChild);
+                            if (previousToken && includeItemAtEndPosition(previousToken)) {
+                                return previousToken;
+                            }
+                        }
+                    }
+                }
+            }
+            for (var i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
+                var child = current.getChildAt(i);
+                if (ts.isJSDocNode(child)) {
+                    continue;
+                }
+                var start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile, includeJsDocComment);
+                if (start <= position) {
+                    var end = child.getEnd();
+                    if (position < end || (position === end && child.kind === 1)) {
+                        current = child;
+                        continue outer;
+                    }
+                    else if (includeItemAtEndPosition && end === position) {
+                        var previousToken = findPrecedingToken(position, sourceFile, child);
+                        if (previousToken && includeItemAtEndPosition(previousToken)) {
+                            return previousToken;
+                        }
+                    }
+                }
+            }
+            return current;
+        }
+    }
+    function findTokenOnLeftOfPosition(file, position) {
+        var tokenAtPosition = getTokenAtPosition(file, position);
+        if (isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
+            return tokenAtPosition;
+        }
+        return findPrecedingToken(position, file);
+    }
+    ts.findTokenOnLeftOfPosition = findTokenOnLeftOfPosition;
+    function findNextToken(previousToken, parent) {
+        return find(parent);
+        function find(n) {
+            if (isToken(n) && n.pos === previousToken.end) {
+                return n;
+            }
+            var children = n.getChildren();
+            for (var _i = 0, children_1 = children; _i < children_1.length; _i++) {
+                var child = children_1[_i];
+                var shouldDiveInChildNode = (child.pos <= previousToken.pos && child.end > previousToken.end) ||
+                    (child.pos === previousToken.end);
+                if (shouldDiveInChildNode && nodeHasTokens(child)) {
+                    return find(child);
+                }
+            }
+            return undefined;
+        }
+    }
+    ts.findNextToken = findNextToken;
+    function findPrecedingToken(position, sourceFile, startNode) {
+        return find(startNode || sourceFile);
+        function findRightmostToken(n) {
+            if (isToken(n) || n.kind === 244) {
+                return n;
+            }
+            var children = n.getChildren();
+            var candidate = findRightmostChildNodeWithTokens(children, children.length);
+            return candidate && findRightmostToken(candidate);
+        }
+        function find(n) {
+            if (isToken(n) || n.kind === 244) {
+                return n;
+            }
+            var children = n.getChildren();
+            for (var i = 0, len = children.length; i < len; i++) {
+                var child = children[i];
+                if (position < child.end && (nodeHasTokens(child) || child.kind === 244)) {
+                    var start = child.getStart(sourceFile);
+                    var lookInPreviousChild = (start >= position) ||
+                        (child.kind === 244 && start === child.end);
+                    if (lookInPreviousChild) {
+                        var candidate = findRightmostChildNodeWithTokens(children, i);
+                        return candidate && findRightmostToken(candidate);
+                    }
+                    else {
+                        return find(child);
+                    }
+                }
+            }
+            ts.Debug.assert(startNode !== undefined || n.kind === 256);
+            if (children.length) {
+                var candidate = findRightmostChildNodeWithTokens(children, children.length);
+                return candidate && findRightmostToken(candidate);
+            }
+        }
+        function findRightmostChildNodeWithTokens(children, exclusiveStartPosition) {
+            for (var i = exclusiveStartPosition - 1; i >= 0; i--) {
+                if (nodeHasTokens(children[i])) {
+                    return children[i];
+                }
+            }
+        }
+    }
+    ts.findPrecedingToken = findPrecedingToken;
+    function isInString(sourceFile, position) {
+        var previousToken = findPrecedingToken(position, sourceFile);
+        if (previousToken &&
+            (previousToken.kind === 9 || previousToken.kind === 166)) {
+            var start = previousToken.getStart();
+            var end = previousToken.getEnd();
+            if (start < position && position < end) {
+                return true;
+            }
+            if (position === end) {
+                return !!previousToken.isUnterminated;
+            }
+        }
+        return false;
+    }
+    ts.isInString = isInString;
+    function isInComment(sourceFile, position) {
+        return isInCommentHelper(sourceFile, position, undefined);
+    }
+    ts.isInComment = isInComment;
+    function isInsideJsxElementOrAttribute(sourceFile, position) {
+        var token = getTokenAtPosition(sourceFile, position);
+        if (!token) {
+            return false;
+        }
+        if (token.kind === 244) {
+            return true;
+        }
+        if (token.kind === 25 && token.parent.kind === 244) {
+            return true;
+        }
+        if (token.kind === 25 && token.parent.kind === 248) {
+            return true;
+        }
+        if (token && token.kind === 16 && token.parent.kind === 248) {
+            return true;
+        }
+        if (token.kind === 25 && token.parent.kind === 245) {
+            return true;
+        }
+        return false;
+    }
+    ts.isInsideJsxElementOrAttribute = isInsideJsxElementOrAttribute;
+    function isInTemplateString(sourceFile, position) {
+        var token = getTokenAtPosition(sourceFile, position);
+        return ts.isTemplateLiteralKind(token.kind) && position > token.getStart(sourceFile);
+    }
+    ts.isInTemplateString = isInTemplateString;
+    function isInCommentHelper(sourceFile, position, predicate) {
+        var token = getTokenAtPosition(sourceFile, position);
+        if (token && position <= token.getStart(sourceFile)) {
+            var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
+            return predicate ?
+                ts.forEach(commentRanges, function (c) { return c.pos < position &&
+                    (c.kind == 2 ? position <= c.end : position < c.end) &&
+                    predicate(c); }) :
+                ts.forEach(commentRanges, function (c) { return c.pos < position &&
+                    (c.kind == 2 ? position <= c.end : position < c.end); });
+        }
+        return false;
+    }
+    ts.isInCommentHelper = isInCommentHelper;
+    function hasDocComment(sourceFile, position) {
+        var token = getTokenAtPosition(sourceFile, position);
+        var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
+        return ts.forEach(commentRanges, jsDocPrefix);
+        function jsDocPrefix(c) {
+            var text = sourceFile.text;
+            return text.length >= c.pos + 3 && text[c.pos] === "/" && text[c.pos + 1] === "*" && text[c.pos + 2] === "*";
+        }
+    }
+    ts.hasDocComment = hasDocComment;
+    function getJsDocTagAtPosition(sourceFile, position) {
+        var node = ts.getTokenAtPosition(sourceFile, position);
+        if (isToken(node)) {
+            switch (node.kind) {
+                case 102:
+                case 108:
+                case 74:
+                    node = node.parent === undefined ? undefined : node.parent.parent;
+                    break;
+                default:
+                    node = node.parent;
+                    break;
+            }
+        }
+        if (node) {
+            if (node.jsDocComments) {
+                for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                    var jsDocComment = _a[_i];
+                    for (var _b = 0, _c = jsDocComment.tags; _b < _c.length; _b++) {
+                        var tag = _c[_b];
+                        if (tag.pos <= position && position <= tag.end) {
+                            return tag;
+                        }
+                    }
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getJsDocTagAtPosition = getJsDocTagAtPosition;
+    function nodeHasTokens(n) {
+        return n.getWidth() !== 0;
+    }
+    function getNodeModifiers(node) {
+        var flags = ts.getCombinedNodeFlags(node);
+        var result = [];
+        if (flags & 8)
+            result.push(ts.ScriptElementKindModifier.privateMemberModifier);
+        if (flags & 16)
+            result.push(ts.ScriptElementKindModifier.protectedMemberModifier);
+        if (flags & 4)
+            result.push(ts.ScriptElementKindModifier.publicMemberModifier);
+        if (flags & 32)
+            result.push(ts.ScriptElementKindModifier.staticModifier);
+        if (flags & 128)
+            result.push(ts.ScriptElementKindModifier.abstractModifier);
+        if (flags & 1)
+            result.push(ts.ScriptElementKindModifier.exportedModifier);
+        if (ts.isInAmbientContext(node))
+            result.push(ts.ScriptElementKindModifier.ambientModifier);
+        return result.length > 0 ? result.join(",") : ts.ScriptElementKindModifier.none;
+    }
+    ts.getNodeModifiers = getNodeModifiers;
+    function getTypeArgumentOrTypeParameterList(node) {
+        if (node.kind === 155 || node.kind === 174) {
+            return node.typeArguments;
+        }
+        if (ts.isFunctionLike(node) || node.kind === 221 || node.kind === 222) {
+            return node.typeParameters;
+        }
+        return undefined;
+    }
+    ts.getTypeArgumentOrTypeParameterList = getTypeArgumentOrTypeParameterList;
+    function isToken(n) {
+        return n.kind >= 0 && n.kind <= 138;
+    }
+    ts.isToken = isToken;
+    function isWord(kind) {
+        return kind === 69 || ts.isKeyword(kind);
+    }
+    ts.isWord = isWord;
+    function isPropertyName(kind) {
+        return kind === 9 || kind === 8 || isWord(kind);
+    }
+    function isComment(kind) {
+        return kind === 2 || kind === 3;
+    }
+    ts.isComment = isComment;
+    function isStringOrRegularExpressionOrTemplateLiteral(kind) {
+        if (kind === 9
+            || kind === 166
+            || kind === 10
+            || ts.isTemplateLiteralKind(kind)) {
+            return true;
+        }
+        return false;
+    }
+    ts.isStringOrRegularExpressionOrTemplateLiteral = isStringOrRegularExpressionOrTemplateLiteral;
+    function isPunctuation(kind) {
+        return 15 <= kind && kind <= 68;
+    }
+    ts.isPunctuation = isPunctuation;
+    function isInsideTemplateLiteral(node, position) {
+        return ts.isTemplateLiteralKind(node.kind)
+            && (node.getStart() < position && position < node.getEnd()) || (!!node.isUnterminated && position === node.getEnd());
+    }
+    ts.isInsideTemplateLiteral = isInsideTemplateLiteral;
+    function isAccessibilityModifier(kind) {
+        switch (kind) {
+            case 112:
+            case 110:
+            case 111:
+                return true;
+        }
+        return false;
+    }
+    ts.isAccessibilityModifier = isAccessibilityModifier;
+    function compareDataObjects(dst, src) {
+        for (var e in dst) {
+            if (typeof dst[e] === "object") {
+                if (!compareDataObjects(dst[e], src[e])) {
+                    return false;
+                }
+            }
+            else if (typeof dst[e] !== "function") {
+                if (dst[e] !== src[e]) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+    ts.compareDataObjects = compareDataObjects;
+    function isArrayLiteralOrObjectLiteralDestructuringPattern(node) {
+        if (node.kind === 170 ||
+            node.kind === 171) {
+            if (node.parent.kind === 187 &&
+                node.parent.left === node &&
+                node.parent.operatorToken.kind === 56) {
+                return true;
+            }
+            if (node.parent.kind === 208 &&
+                node.parent.initializer === node) {
+                return true;
+            }
+            if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.kind === 253 ? node.parent.parent : node.parent)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.isArrayLiteralOrObjectLiteralDestructuringPattern = isArrayLiteralOrObjectLiteralDestructuringPattern;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function isFirstDeclarationOfSymbolParameter(symbol) {
+        return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === 142;
+    }
+    ts.isFirstDeclarationOfSymbolParameter = isFirstDeclarationOfSymbolParameter;
+    var displayPartWriter = getDisplayPartWriter();
+    function getDisplayPartWriter() {
+        var displayParts;
+        var lineStart;
+        var indent;
+        resetWriter();
+        return {
+            displayParts: function () { return displayParts; },
+            writeKeyword: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.keyword); },
+            writeOperator: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.operator); },
+            writePunctuation: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.punctuation); },
+            writeSpace: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.space); },
+            writeStringLiteral: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.stringLiteral); },
+            writeParameter: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.parameterName); },
+            writeSymbol: writeSymbol,
+            writeLine: writeLine,
+            increaseIndent: function () { indent++; },
+            decreaseIndent: function () { indent--; },
+            clear: resetWriter,
+            trackSymbol: function () { },
+            reportInaccessibleThisError: function () { }
+        };
+        function writeIndent() {
+            if (lineStart) {
+                var indentString = ts.getIndentString(indent);
+                if (indentString) {
+                    displayParts.push(displayPart(indentString, ts.SymbolDisplayPartKind.space));
+                }
+                lineStart = false;
+            }
+        }
+        function writeKind(text, kind) {
+            writeIndent();
+            displayParts.push(displayPart(text, kind));
+        }
+        function writeSymbol(text, symbol) {
+            writeIndent();
+            displayParts.push(symbolPart(text, symbol));
+        }
+        function writeLine() {
+            displayParts.push(lineBreakPart());
+            lineStart = true;
+        }
+        function resetWriter() {
+            displayParts = [];
+            lineStart = true;
+            indent = 0;
+        }
+    }
+    function symbolPart(text, symbol) {
+        return displayPart(text, displayPartKind(symbol), symbol);
+        function displayPartKind(symbol) {
+            var flags = symbol.flags;
+            if (flags & 3) {
+                return isFirstDeclarationOfSymbolParameter(symbol) ? ts.SymbolDisplayPartKind.parameterName : ts.SymbolDisplayPartKind.localName;
+            }
+            else if (flags & 4) {
+                return ts.SymbolDisplayPartKind.propertyName;
+            }
+            else if (flags & 32768) {
+                return ts.SymbolDisplayPartKind.propertyName;
+            }
+            else if (flags & 65536) {
+                return ts.SymbolDisplayPartKind.propertyName;
+            }
+            else if (flags & 8) {
+                return ts.SymbolDisplayPartKind.enumMemberName;
+            }
+            else if (flags & 16) {
+                return ts.SymbolDisplayPartKind.functionName;
+            }
+            else if (flags & 32) {
+                return ts.SymbolDisplayPartKind.className;
+            }
+            else if (flags & 64) {
+                return ts.SymbolDisplayPartKind.interfaceName;
+            }
+            else if (flags & 384) {
+                return ts.SymbolDisplayPartKind.enumName;
+            }
+            else if (flags & 1536) {
+                return ts.SymbolDisplayPartKind.moduleName;
+            }
+            else if (flags & 8192) {
+                return ts.SymbolDisplayPartKind.methodName;
+            }
+            else if (flags & 262144) {
+                return ts.SymbolDisplayPartKind.typeParameterName;
+            }
+            else if (flags & 524288) {
+                return ts.SymbolDisplayPartKind.aliasName;
+            }
+            else if (flags & 8388608) {
+                return ts.SymbolDisplayPartKind.aliasName;
+            }
+            return ts.SymbolDisplayPartKind.text;
+        }
+    }
+    ts.symbolPart = symbolPart;
+    function displayPart(text, kind, symbol) {
+        return {
+            text: text,
+            kind: ts.SymbolDisplayPartKind[kind]
+        };
+    }
+    ts.displayPart = displayPart;
+    function spacePart() {
+        return displayPart(" ", ts.SymbolDisplayPartKind.space);
+    }
+    ts.spacePart = spacePart;
+    function keywordPart(kind) {
+        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.keyword);
+    }
+    ts.keywordPart = keywordPart;
+    function punctuationPart(kind) {
+        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.punctuation);
+    }
+    ts.punctuationPart = punctuationPart;
+    function operatorPart(kind) {
+        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.operator);
+    }
+    ts.operatorPart = operatorPart;
+    function textOrKeywordPart(text) {
+        var kind = ts.stringToToken(text);
+        return kind === undefined
+            ? textPart(text)
+            : keywordPart(kind);
+    }
+    ts.textOrKeywordPart = textOrKeywordPart;
+    function textPart(text) {
+        return displayPart(text, ts.SymbolDisplayPartKind.text);
+    }
+    ts.textPart = textPart;
+    var carriageReturnLineFeed = "\r\n";
+    function getNewLineOrDefaultFromHost(host) {
+        return host.getNewLine ? host.getNewLine() : carriageReturnLineFeed;
+    }
+    ts.getNewLineOrDefaultFromHost = getNewLineOrDefaultFromHost;
+    function lineBreakPart() {
+        return displayPart("\n", ts.SymbolDisplayPartKind.lineBreak);
+    }
+    ts.lineBreakPart = lineBreakPart;
+    function mapToDisplayParts(writeDisplayParts) {
+        writeDisplayParts(displayPartWriter);
+        var result = displayPartWriter.displayParts();
+        displayPartWriter.clear();
+        return result;
+    }
+    ts.mapToDisplayParts = mapToDisplayParts;
+    function typeToDisplayParts(typechecker, type, enclosingDeclaration, flags) {
+        return mapToDisplayParts(function (writer) {
+            typechecker.getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        });
+    }
+    ts.typeToDisplayParts = typeToDisplayParts;
+    function symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration, meaning, flags) {
+        return mapToDisplayParts(function (writer) {
+            typeChecker.getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags);
+        });
+    }
+    ts.symbolToDisplayParts = symbolToDisplayParts;
+    function signatureToDisplayParts(typechecker, signature, enclosingDeclaration, flags) {
+        return mapToDisplayParts(function (writer) {
+            typechecker.getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags);
+        });
+    }
+    ts.signatureToDisplayParts = signatureToDisplayParts;
+    function getDeclaredName(typeChecker, symbol, location) {
+        if (isImportOrExportSpecifierName(location)) {
+            return location.getText();
+        }
+        else if (ts.isStringOrNumericLiteral(location.kind) &&
+            location.parent.kind === 140) {
+            return location.text;
+        }
+        var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
+        var name = typeChecker.symbolToString(localExportDefaultSymbol || symbol);
+        return name;
+    }
+    ts.getDeclaredName = getDeclaredName;
+    function isImportOrExportSpecifierName(location) {
+        return location.parent &&
+            (location.parent.kind === 234 || location.parent.kind === 238) &&
+            location.parent.propertyName === location;
+    }
+    ts.isImportOrExportSpecifierName = isImportOrExportSpecifierName;
+    function stripQuotes(name) {
+        var length = name.length;
+        if (length >= 2 &&
+            name.charCodeAt(0) === name.charCodeAt(length - 1) &&
+            (name.charCodeAt(0) === 34 || name.charCodeAt(0) === 39)) {
+            return name.substring(1, length - 1);
+        }
+        ;
+        return name;
+    }
+    ts.stripQuotes = stripQuotes;
+    function scriptKindIs(fileName, host) {
+        var scriptKinds = [];
+        for (var _i = 2; _i < arguments.length; _i++) {
+            scriptKinds[_i - 2] = arguments[_i];
+        }
+        var scriptKind = getScriptKind(fileName, host);
+        return ts.forEach(scriptKinds, function (k) { return k === scriptKind; });
+    }
+    ts.scriptKindIs = scriptKindIs;
+    function getScriptKind(fileName, host) {
+        var scriptKind;
+        if (host && host.getScriptKind) {
+            scriptKind = host.getScriptKind(fileName);
+        }
+        if (!scriptKind || scriptKind === 0) {
+            scriptKind = ts.getScriptKindFromFileName(fileName);
+        }
+        return ts.ensureScriptKind(fileName, scriptKind);
+    }
+    ts.getScriptKind = getScriptKind;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var JsTyping;
+    (function (JsTyping) {
+        ;
+        ;
+        var safeList;
+        function discoverTypings(host, fileNames, projectRootPath, safeListPath, packageNameToTypingLocation, typingOptions, compilerOptions) {
+            var inferredTypings = {};
+            if (!typingOptions || !typingOptions.enableAutoDiscovery) {
+                return { cachedTypingPaths: [], newTypingNames: [], filesToWatch: [] };
+            }
+            fileNames = ts.filter(ts.map(fileNames, ts.normalizePath), function (f) { return ts.scriptKindIs(f, undefined, 1, 2); });
+            if (!safeList) {
+                var result = ts.readConfigFile(safeListPath, function (path) { return host.readFile(path); });
+                if (result.config) {
+                    safeList = result.config;
+                }
+                else {
+                    safeList = {};
+                }
+                ;
+            }
+            var filesToWatch = [];
+            var searchDirs = [];
+            var exclude = [];
+            mergeTypings(typingOptions.include);
+            exclude = typingOptions.exclude || [];
+            var possibleSearchDirs = ts.map(fileNames, ts.getDirectoryPath);
+            if (projectRootPath !== undefined) {
+                possibleSearchDirs.push(projectRootPath);
+            }
+            searchDirs = ts.deduplicate(possibleSearchDirs);
+            for (var _i = 0, searchDirs_1 = searchDirs; _i < searchDirs_1.length; _i++) {
+                var searchDir = searchDirs_1[_i];
+                var packageJsonPath = ts.combinePaths(searchDir, "package.json");
+                getTypingNamesFromJson(packageJsonPath, filesToWatch);
+                var bowerJsonPath = ts.combinePaths(searchDir, "bower.json");
+                getTypingNamesFromJson(bowerJsonPath, filesToWatch);
+                var nodeModulesPath = ts.combinePaths(searchDir, "node_modules");
+                getTypingNamesFromNodeModuleFolder(nodeModulesPath);
+            }
+            getTypingNamesFromSourceFileNames(fileNames);
+            for (var name_38 in packageNameToTypingLocation) {
+                if (ts.hasProperty(inferredTypings, name_38) && !inferredTypings[name_38]) {
+                    inferredTypings[name_38] = packageNameToTypingLocation[name_38];
+                }
+            }
+            for (var _a = 0, exclude_1 = exclude; _a < exclude_1.length; _a++) {
+                var excludeTypingName = exclude_1[_a];
+                delete inferredTypings[excludeTypingName];
+            }
+            var newTypingNames = [];
+            var cachedTypingPaths = [];
+            for (var typing in inferredTypings) {
+                if (inferredTypings[typing] !== undefined) {
+                    cachedTypingPaths.push(inferredTypings[typing]);
+                }
+                else {
+                    newTypingNames.push(typing);
+                }
+            }
+            return { cachedTypingPaths: cachedTypingPaths, newTypingNames: newTypingNames, filesToWatch: filesToWatch };
+            function mergeTypings(typingNames) {
+                if (!typingNames) {
+                    return;
+                }
+                for (var _i = 0, typingNames_1 = typingNames; _i < typingNames_1.length; _i++) {
+                    var typing = typingNames_1[_i];
+                    if (!ts.hasProperty(inferredTypings, typing)) {
+                        inferredTypings[typing] = undefined;
+                    }
+                }
+            }
+            function getTypingNamesFromJson(jsonPath, filesToWatch) {
+                var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); });
+                if (result.config) {
+                    var jsonConfig = result.config;
+                    filesToWatch.push(jsonPath);
+                    if (jsonConfig.dependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.dependencies));
+                    }
+                    if (jsonConfig.devDependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.devDependencies));
+                    }
+                    if (jsonConfig.optionalDependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.optionalDependencies));
+                    }
+                    if (jsonConfig.peerDependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.peerDependencies));
+                    }
+                }
+            }
+            function getTypingNamesFromSourceFileNames(fileNames) {
+                var jsFileNames = ts.filter(fileNames, ts.hasJavaScriptFileExtension);
+                var inferredTypingNames = ts.map(jsFileNames, function (f) { return ts.removeFileExtension(ts.getBaseFileName(f.toLowerCase())); });
+                var cleanedTypingNames = ts.map(inferredTypingNames, function (f) { return f.replace(/((?:\.|-)min(?=\.|$))|((?:-|\.)\d+)/g, ""); });
+                if (safeList === undefined) {
+                    mergeTypings(cleanedTypingNames);
+                }
+                else {
+                    mergeTypings(ts.filter(cleanedTypingNames, function (f) { return ts.hasProperty(safeList, f); }));
+                }
+                var hasJsxFile = ts.forEach(fileNames, function (f) { return ts.scriptKindIs(f, undefined, 2); });
+                if (hasJsxFile) {
+                    mergeTypings(["react"]);
+                }
+            }
+            function getTypingNamesFromNodeModuleFolder(nodeModulesPath) {
+                if (!host.directoryExists(nodeModulesPath)) {
+                    return;
+                }
+                var typingNames = [];
+                var fileNames = host.readDirectory(nodeModulesPath, "*.json", undefined, 2);
+                for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
+                    var fileName = fileNames_1[_i];
+                    var normalizedFileName = ts.normalizePath(fileName);
+                    if (ts.getBaseFileName(normalizedFileName) !== "package.json") {
+                        continue;
+                    }
+                    var result = ts.readConfigFile(normalizedFileName, function (path) { return host.readFile(path); });
+                    if (!result.config) {
+                        continue;
+                    }
+                    var packageJson = result.config;
+                    if (packageJson._requiredBy &&
+                        ts.filter(packageJson._requiredBy, function (r) { return r[0] === "#" || r === "/"; }).length === 0) {
+                        continue;
+                    }
+                    if (!packageJson.name) {
+                        continue;
+                    }
+                    if (packageJson.typings) {
+                        var absolutePath = ts.getNormalizedAbsolutePath(packageJson.typings, ts.getDirectoryPath(normalizedFileName));
+                        inferredTypings[packageJson.name] = absolutePath;
+                    }
+                    else {
+                        typingNames.push(packageJson.name);
+                    }
+                }
+                mergeTypings(typingNames);
+            }
+        }
+        JsTyping.discoverTypings = discoverTypings;
+    })(JsTyping = ts.JsTyping || (ts.JsTyping = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var standardScanner = ts.createScanner(2, false, 0);
+        var jsxScanner = ts.createScanner(2, false, 1);
+        var scanner;
+        function getFormattingScanner(sourceFile, startPos, endPos) {
+            ts.Debug.assert(scanner === undefined);
+            scanner = sourceFile.languageVariant === 1 ? jsxScanner : standardScanner;
+            scanner.setText(sourceFile.text);
+            scanner.setTextPos(startPos);
+            var wasNewLine = true;
+            var leadingTrivia;
+            var trailingTrivia;
+            var savedPos;
+            var lastScanAction;
+            var lastTokenInfo;
+            return {
+                advance: advance,
+                readTokenInfo: readTokenInfo,
+                isOnToken: isOnToken,
+                getCurrentLeadingTrivia: function () { return leadingTrivia; },
+                lastTrailingTriviaWasNewLine: function () { return wasNewLine; },
+                close: function () {
+                    ts.Debug.assert(scanner !== undefined);
+                    lastTokenInfo = undefined;
+                    scanner.setText(undefined);
+                    scanner = undefined;
+                }
+            };
+            function advance() {
+                ts.Debug.assert(scanner !== undefined);
+                lastTokenInfo = undefined;
+                var isStarted = scanner.getStartPos() !== startPos;
+                if (isStarted) {
+                    if (trailingTrivia) {
+                        ts.Debug.assert(trailingTrivia.length !== 0);
+                        wasNewLine = ts.lastOrUndefined(trailingTrivia).kind === 4;
+                    }
+                    else {
+                        wasNewLine = false;
+                    }
+                }
+                leadingTrivia = undefined;
+                trailingTrivia = undefined;
+                if (!isStarted) {
+                    scanner.scan();
+                }
+                var pos = scanner.getStartPos();
+                while (pos < endPos) {
+                    var t = scanner.getToken();
+                    if (!ts.isTrivia(t)) {
+                        break;
+                    }
+                    scanner.scan();
+                    var item = {
+                        pos: pos,
+                        end: scanner.getStartPos(),
+                        kind: t
+                    };
+                    pos = scanner.getStartPos();
+                    if (!leadingTrivia) {
+                        leadingTrivia = [];
+                    }
+                    leadingTrivia.push(item);
+                }
+                savedPos = scanner.getStartPos();
+            }
+            function shouldRescanGreaterThanToken(node) {
+                if (node) {
+                    switch (node.kind) {
+                        case 29:
+                        case 64:
+                        case 65:
+                        case 45:
+                        case 44:
+                            return true;
+                    }
+                }
+                return false;
+            }
+            function shouldRescanJsxIdentifier(node) {
+                if (node.parent) {
+                    switch (node.parent.kind) {
+                        case 246:
+                        case 243:
+                        case 245:
+                        case 242:
+                            return node.kind === 69;
+                    }
+                }
+                return false;
+            }
+            function shouldRescanSlashToken(container) {
+                return container.kind === 10;
+            }
+            function shouldRescanTemplateToken(container) {
+                return container.kind === 13 ||
+                    container.kind === 14;
+            }
+            function startsWithSlashToken(t) {
+                return t === 39 || t === 61;
+            }
+            function readTokenInfo(n) {
+                ts.Debug.assert(scanner !== undefined);
+                if (!isOnToken()) {
+                    return {
+                        leadingTrivia: leadingTrivia,
+                        trailingTrivia: undefined,
+                        token: undefined
+                    };
+                }
+                var expectedScanAction = shouldRescanGreaterThanToken(n)
+                    ? 1
+                    : shouldRescanSlashToken(n)
+                        ? 2
+                        : shouldRescanTemplateToken(n)
+                            ? 3
+                            : shouldRescanJsxIdentifier(n)
+                                ? 4
+                                : 0;
+                if (lastTokenInfo && expectedScanAction === lastScanAction) {
+                    return fixTokenKind(lastTokenInfo, n);
+                }
+                if (scanner.getStartPos() !== savedPos) {
+                    ts.Debug.assert(lastTokenInfo !== undefined);
+                    scanner.setTextPos(savedPos);
+                    scanner.scan();
+                }
+                var currentToken = scanner.getToken();
+                if (expectedScanAction === 1 && currentToken === 27) {
+                    currentToken = scanner.reScanGreaterToken();
+                    ts.Debug.assert(n.kind === currentToken);
+                    lastScanAction = 1;
+                }
+                else if (expectedScanAction === 2 && startsWithSlashToken(currentToken)) {
+                    currentToken = scanner.reScanSlashToken();
+                    ts.Debug.assert(n.kind === currentToken);
+                    lastScanAction = 2;
+                }
+                else if (expectedScanAction === 3 && currentToken === 16) {
+                    currentToken = scanner.reScanTemplateToken();
+                    lastScanAction = 3;
+                }
+                else if (expectedScanAction === 4 && currentToken === 69) {
+                    currentToken = scanner.scanJsxIdentifier();
+                    lastScanAction = 4;
+                }
+                else {
+                    lastScanAction = 0;
+                }
+                var token = {
+                    pos: scanner.getStartPos(),
+                    end: scanner.getTextPos(),
+                    kind: currentToken
+                };
+                if (trailingTrivia) {
+                    trailingTrivia = undefined;
+                }
+                while (scanner.getStartPos() < endPos) {
+                    currentToken = scanner.scan();
+                    if (!ts.isTrivia(currentToken)) {
+                        break;
+                    }
+                    var trivia = {
+                        pos: scanner.getStartPos(),
+                        end: scanner.getTextPos(),
+                        kind: currentToken
+                    };
+                    if (!trailingTrivia) {
+                        trailingTrivia = [];
+                    }
+                    trailingTrivia.push(trivia);
+                    if (currentToken === 4) {
+                        scanner.scan();
+                        break;
+                    }
+                }
+                lastTokenInfo = {
+                    leadingTrivia: leadingTrivia,
+                    trailingTrivia: trailingTrivia,
+                    token: token
+                };
+                return fixTokenKind(lastTokenInfo, n);
+            }
+            function isOnToken() {
+                ts.Debug.assert(scanner !== undefined);
+                var current = (lastTokenInfo && lastTokenInfo.token.kind) || scanner.getToken();
+                var startPos = (lastTokenInfo && lastTokenInfo.token.pos) || scanner.getStartPos();
+                return startPos < endPos && current !== 1 && !ts.isTrivia(current);
+            }
+            function fixTokenKind(tokenInfo, container) {
+                if (ts.isToken(container) && tokenInfo.token.kind !== container.kind) {
+                    tokenInfo.token.kind = container.kind;
+                }
+                return tokenInfo;
+            }
+        }
+        formatting.getFormattingScanner = getFormattingScanner;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var FormattingContext = (function () {
+            function FormattingContext(sourceFile, formattingRequestKind) {
+                this.sourceFile = sourceFile;
+                this.formattingRequestKind = formattingRequestKind;
+            }
+            FormattingContext.prototype.updateContext = function (currentRange, currentTokenParent, nextRange, nextTokenParent, commonParent) {
+                ts.Debug.assert(currentRange !== undefined, "currentTokenSpan is null");
+                ts.Debug.assert(currentTokenParent !== undefined, "currentTokenParent is null");
+                ts.Debug.assert(nextRange !== undefined, "nextTokenSpan is null");
+                ts.Debug.assert(nextTokenParent !== undefined, "nextTokenParent is null");
+                ts.Debug.assert(commonParent !== undefined, "commonParent is null");
+                this.currentTokenSpan = currentRange;
+                this.currentTokenParent = currentTokenParent;
+                this.nextTokenSpan = nextRange;
+                this.nextTokenParent = nextTokenParent;
+                this.contextNode = commonParent;
+                this.contextNodeAllOnSameLine = undefined;
+                this.nextNodeAllOnSameLine = undefined;
+                this.tokensAreOnSameLine = undefined;
+                this.contextNodeBlockIsOnOneLine = undefined;
+                this.nextNodeBlockIsOnOneLine = undefined;
+            };
+            FormattingContext.prototype.ContextNodeAllOnSameLine = function () {
+                if (this.contextNodeAllOnSameLine === undefined) {
+                    this.contextNodeAllOnSameLine = this.NodeIsOnOneLine(this.contextNode);
+                }
+                return this.contextNodeAllOnSameLine;
+            };
+            FormattingContext.prototype.NextNodeAllOnSameLine = function () {
+                if (this.nextNodeAllOnSameLine === undefined) {
+                    this.nextNodeAllOnSameLine = this.NodeIsOnOneLine(this.nextTokenParent);
+                }
+                return this.nextNodeAllOnSameLine;
+            };
+            FormattingContext.prototype.TokensAreOnSameLine = function () {
+                if (this.tokensAreOnSameLine === undefined) {
+                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(this.currentTokenSpan.pos).line;
+                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(this.nextTokenSpan.pos).line;
+                    this.tokensAreOnSameLine = (startLine === endLine);
+                }
+                return this.tokensAreOnSameLine;
+            };
+            FormattingContext.prototype.ContextNodeBlockIsOnOneLine = function () {
+                if (this.contextNodeBlockIsOnOneLine === undefined) {
+                    this.contextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.contextNode);
+                }
+                return this.contextNodeBlockIsOnOneLine;
+            };
+            FormattingContext.prototype.NextNodeBlockIsOnOneLine = function () {
+                if (this.nextNodeBlockIsOnOneLine === undefined) {
+                    this.nextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.nextTokenParent);
+                }
+                return this.nextNodeBlockIsOnOneLine;
+            };
+            FormattingContext.prototype.NodeIsOnOneLine = function (node) {
+                var startLine = this.sourceFile.getLineAndCharacterOfPosition(node.getStart(this.sourceFile)).line;
+                var endLine = this.sourceFile.getLineAndCharacterOfPosition(node.getEnd()).line;
+                return startLine === endLine;
+            };
+            FormattingContext.prototype.BlockIsOnOneLine = function (node) {
+                var openBrace = ts.findChildOfKind(node, 15, this.sourceFile);
+                var closeBrace = ts.findChildOfKind(node, 16, this.sourceFile);
+                if (openBrace && closeBrace) {
+                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(openBrace.getEnd()).line;
+                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(closeBrace.getStart(this.sourceFile)).line;
+                    return startLine === endLine;
+                }
+                return false;
+            };
+            return FormattingContext;
+        }());
+        formatting.FormattingContext = FormattingContext;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Rule = (function () {
+            function Rule(Descriptor, Operation, Flag) {
+                if (Flag === void 0) { Flag = 0; }
+                this.Descriptor = Descriptor;
+                this.Operation = Operation;
+                this.Flag = Flag;
+            }
+            Rule.prototype.toString = function () {
+                return "[desc=" + this.Descriptor + "," +
+                    "operation=" + this.Operation + "," +
+                    "flag=" + this.Flag + "]";
+            };
+            return Rule;
+        }());
+        formatting.Rule = Rule;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleDescriptor = (function () {
+            function RuleDescriptor(LeftTokenRange, RightTokenRange) {
+                this.LeftTokenRange = LeftTokenRange;
+                this.RightTokenRange = RightTokenRange;
+            }
+            RuleDescriptor.prototype.toString = function () {
+                return "[leftRange=" + this.LeftTokenRange + "," +
+                    "rightRange=" + this.RightTokenRange + "]";
+            };
+            RuleDescriptor.create1 = function (left, right) {
+                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), formatting.Shared.TokenRange.FromToken(right));
+            };
+            RuleDescriptor.create2 = function (left, right) {
+                return RuleDescriptor.create4(left, formatting.Shared.TokenRange.FromToken(right));
+            };
+            RuleDescriptor.create3 = function (left, right) {
+                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), right);
+            };
+            RuleDescriptor.create4 = function (left, right) {
+                return new RuleDescriptor(left, right);
+            };
+            return RuleDescriptor;
+        }());
+        formatting.RuleDescriptor = RuleDescriptor;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleOperation = (function () {
+            function RuleOperation(Context, Action) {
+                this.Context = Context;
+                this.Action = Action;
+            }
+            RuleOperation.prototype.toString = function () {
+                return "[context=" + this.Context + "," +
+                    "action=" + this.Action + "]";
+            };
+            RuleOperation.create1 = function (action) {
+                return RuleOperation.create2(formatting.RuleOperationContext.Any, action);
+            };
+            RuleOperation.create2 = function (context, action) {
+                return new RuleOperation(context, action);
+            };
+            return RuleOperation;
+        }());
+        formatting.RuleOperation = RuleOperation;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleOperationContext = (function () {
+            function RuleOperationContext() {
+                var funcs = [];
+                for (var _i = 0; _i < arguments.length; _i++) {
+                    funcs[_i - 0] = arguments[_i];
+                }
+                this.customContextChecks = funcs;
+            }
+            RuleOperationContext.prototype.IsAny = function () {
+                return this === RuleOperationContext.Any;
+            };
+            RuleOperationContext.prototype.InContext = function (context) {
+                if (this.IsAny()) {
+                    return true;
+                }
+                for (var _i = 0, _a = this.customContextChecks; _i < _a.length; _i++) {
+                    var check = _a[_i];
+                    if (!check(context)) {
+                        return false;
+                    }
+                }
+                return true;
+            };
+            RuleOperationContext.Any = new RuleOperationContext();
+            return RuleOperationContext;
+        }());
+        formatting.RuleOperationContext = RuleOperationContext;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Rules = (function () {
+            function Rules() {
+                this.IgnoreBeforeComment = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.Comments), formatting.RuleOperation.create1(1));
+                this.IgnoreAfterLineComment = new formatting.Rule(formatting.RuleDescriptor.create3(2, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create1(1));
+                this.NoSpaceBeforeSemicolon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 23), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeColon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 54), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
+                this.NoSpaceBeforeQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 53), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
+                this.SpaceAfterColon = new formatting.Rule(formatting.RuleDescriptor.create3(54, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 2));
+                this.SpaceAfterQuestionMarkInConditionalOperator = new formatting.Rule(formatting.RuleDescriptor.create3(53, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConditionalOperatorContext), 2));
+                this.NoSpaceAfterQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create3(53, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterSemicolon = new formatting.Rule(formatting.RuleDescriptor.create3(23, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), 2));
+                this.SpaceBetweenCloseBraceAndElse = new formatting.Rule(formatting.RuleDescriptor.create1(16, 80), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceBetweenCloseBraceAndWhile = new formatting.Rule(formatting.RuleDescriptor.create1(16, 104), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16, formatting.Shared.TokenRange.FromTokens([18, 20, 24, 23])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeDot = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 21), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterDot = new formatting.Rule(formatting.RuleDescriptor.create3(21, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create3(20, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), 8));
+                this.FunctionOpenBraceLeftTokenRange = formatting.Shared.TokenRange.AnyIncludingMultilineComments;
+                this.SpaceBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2), 1);
+                this.TypeScriptOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([69, 3, 73]);
+                this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2), 1);
+                this.ControlOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([18, 3, 79, 100, 85, 80]);
+                this.SpaceBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2), 1);
+                this.SpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(15, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2));
+                this.SpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2));
+                this.NoSpaceBetweenEmptyBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), 8));
+                this.NewLineAfterOpenBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create3(15, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4));
+                this.NewLineBeforeCloseBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyIncludingMultilineComments, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4));
+                this.NoSpaceAfterUnaryPrefixOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.UnaryPrefixOperators, formatting.Shared.TokenRange.UnaryPrefixExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
+                this.NoSpaceAfterUnaryPreincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(41, formatting.Shared.TokenRange.UnaryPreincrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterUnaryPredecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(42, formatting.Shared.TokenRange.UnaryPredecrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeUnaryPostincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostincrementExpressions, 41), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeUnaryPostdecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostdecrementExpressions, 42), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterPostincrementWhenFollowedByAdd = new formatting.Rule(formatting.RuleDescriptor.create1(41, 35), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterAddWhenFollowedByUnaryPlus = new formatting.Rule(formatting.RuleDescriptor.create1(35, 35), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterAddWhenFollowedByPreincrement = new formatting.Rule(formatting.RuleDescriptor.create1(35, 41), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterPostdecrementWhenFollowedBySubtract = new formatting.Rule(formatting.RuleDescriptor.create1(42, 36), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterSubtractWhenFollowedByUnaryMinus = new formatting.Rule(formatting.RuleDescriptor.create1(36, 36), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterSubtractWhenFollowedByPredecrement = new formatting.Rule(formatting.RuleDescriptor.create1(36, 42), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.NoSpaceBeforeComma = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 24), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterCertainKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([102, 98, 92, 78, 94, 101, 119]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceAfterLetConstInVariableDeclaration = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([108, 74]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), 2));
+                this.NoSpaceBeforeOpenParenInFuncCall = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), 8));
+                this.SpaceAfterFunctionInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create3(87, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2));
+                this.NoSpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 8));
+                this.SpaceAfterVoidOperator = new formatting.Rule(formatting.RuleDescriptor.create3(103, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), 2));
+                this.NoSpaceBetweenReturnAndSemicolon = new formatting.Rule(formatting.RuleDescriptor.create1(94, 23), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceBetweenStatements = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([18, 79, 80, 71]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotForContext), 2));
+                this.SpaceAfterTryFinally = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([100, 85]), 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceAfterGetSetInMember = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([123, 131]), 69), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2));
+                this.SpaceBeforeBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryKeywordOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryKeywordOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.NoSpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(121, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterModuleImport = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([125, 129]), 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([115, 73, 122, 77, 81, 82, 83, 123, 106, 89, 107, 125, 126, 110, 112, 111, 131, 113, 134]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceBeforeCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([83, 106])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceAfterModuleName = new formatting.Rule(formatting.RuleDescriptor.create1(9, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsModuleDeclContext), 2));
+                this.SpaceBeforeArrow = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 34), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceAfterArrow = new formatting.Rule(formatting.RuleDescriptor.create3(34, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceAfterEllipsis = new formatting.Rule(formatting.RuleDescriptor.create1(22, 69), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterOptionalParameters = new formatting.Rule(formatting.RuleDescriptor.create3(53, formatting.Shared.TokenRange.FromTokens([18, 24])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
+                this.NoSpaceBeforeOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.TypeNames, 25), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
+                this.NoSpaceBetweenCloseParenAndAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create1(18, 25), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
+                this.NoSpaceAfterOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(25, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
+                this.NoSpaceBeforeCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 27), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
+                this.NoSpaceAfterCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(27, formatting.Shared.TokenRange.FromTokens([17, 19, 27, 24])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
+                this.NoSpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(27, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 8));
+                this.NoSpaceBetweenEmptyInterfaceBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectTypeContext), 8));
+                this.SpaceBeforeAt = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 55), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceAfterAt = new formatting.Rule(formatting.RuleDescriptor.create3(55, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterDecorator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([115, 69, 82, 77, 73, 113, 112, 110, 111, 123, 131, 19, 37])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsEndOfDecoratorContextOnSameLine), 2));
+                this.NoSpaceBetweenFunctionKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(87, 37), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 8));
+                this.SpaceAfterStarInGeneratorDeclaration = new formatting.Rule(formatting.RuleDescriptor.create3(37, formatting.Shared.TokenRange.FromTokens([69, 17])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 2));
+                this.NoSpaceBetweenYieldKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(114, 37), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 8));
+                this.SpaceBetweenYieldOrYieldStarAndOperand = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([114, 37]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 2));
+                this.SpaceBetweenAsyncAndOpenParen = new formatting.Rule(formatting.RuleDescriptor.create1(118, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsArrowFunctionContext, Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceBetweenAsyncAndFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(118, 87), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceBetweenTagAndTemplateString = new formatting.Rule(formatting.RuleDescriptor.create3(69, formatting.Shared.TokenRange.FromTokens([11, 12])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.HighPriorityCommonRules = [
+                    this.IgnoreBeforeComment, this.IgnoreAfterLineComment,
+                    this.NoSpaceBeforeColon, this.SpaceAfterColon, this.NoSpaceBeforeQuestionMark, this.SpaceAfterQuestionMarkInConditionalOperator,
+                    this.NoSpaceAfterQuestionMark,
+                    this.NoSpaceBeforeDot, this.NoSpaceAfterDot,
+                    this.NoSpaceAfterUnaryPrefixOperator,
+                    this.NoSpaceAfterUnaryPreincrementOperator, this.NoSpaceAfterUnaryPredecrementOperator,
+                    this.NoSpaceBeforeUnaryPostincrementOperator, this.NoSpaceBeforeUnaryPostdecrementOperator,
+                    this.SpaceAfterPostincrementWhenFollowedByAdd,
+                    this.SpaceAfterAddWhenFollowedByUnaryPlus, this.SpaceAfterAddWhenFollowedByPreincrement,
+                    this.SpaceAfterPostdecrementWhenFollowedBySubtract,
+                    this.SpaceAfterSubtractWhenFollowedByUnaryMinus, this.SpaceAfterSubtractWhenFollowedByPredecrement,
+                    this.NoSpaceAfterCloseBrace,
+                    this.SpaceAfterOpenBrace, this.SpaceBeforeCloseBrace, this.NewLineBeforeCloseBraceInBlockContext,
+                    this.SpaceAfterCloseBrace, this.SpaceBetweenCloseBraceAndElse, this.SpaceBetweenCloseBraceAndWhile, this.NoSpaceBetweenEmptyBraceBrackets,
+                    this.NoSpaceBetweenFunctionKeywordAndStar, this.SpaceAfterStarInGeneratorDeclaration,
+                    this.SpaceAfterFunctionInFuncDecl, this.NewLineAfterOpenBraceInBlockContext, this.SpaceAfterGetSetInMember,
+                    this.NoSpaceBetweenYieldKeywordAndStar, this.SpaceBetweenYieldOrYieldStarAndOperand,
+                    this.NoSpaceBetweenReturnAndSemicolon,
+                    this.SpaceAfterCertainKeywords,
+                    this.SpaceAfterLetConstInVariableDeclaration,
+                    this.NoSpaceBeforeOpenParenInFuncCall,
+                    this.SpaceBeforeBinaryKeywordOperator, this.SpaceAfterBinaryKeywordOperator,
+                    this.SpaceAfterVoidOperator,
+                    this.SpaceBetweenAsyncAndOpenParen, this.SpaceBetweenAsyncAndFunctionKeyword,
+                    this.NoSpaceBetweenTagAndTemplateString,
+                    this.NoSpaceAfterConstructor, this.NoSpaceAfterModuleImport,
+                    this.SpaceAfterCertainTypeScriptKeywords, this.SpaceBeforeCertainTypeScriptKeywords,
+                    this.SpaceAfterModuleName,
+                    this.SpaceBeforeArrow, this.SpaceAfterArrow,
+                    this.NoSpaceAfterEllipsis,
+                    this.NoSpaceAfterOptionalParameters,
+                    this.NoSpaceBetweenEmptyInterfaceBraceBrackets,
+                    this.NoSpaceBeforeOpenAngularBracket,
+                    this.NoSpaceBetweenCloseParenAndAngularBracket,
+                    this.NoSpaceAfterOpenAngularBracket,
+                    this.NoSpaceBeforeCloseAngularBracket,
+                    this.NoSpaceAfterCloseAngularBracket,
+                    this.NoSpaceAfterTypeAssertion,
+                    this.SpaceBeforeAt,
+                    this.NoSpaceAfterAt,
+                    this.SpaceAfterDecorator,
+                ];
+                this.LowPriorityCommonRules = [
+                    this.NoSpaceBeforeSemicolon,
+                    this.SpaceBeforeOpenBraceInControl, this.SpaceBeforeOpenBraceInFunction, this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock,
+                    this.NoSpaceBeforeComma,
+                    this.NoSpaceBeforeOpenBracket,
+                    this.NoSpaceAfterCloseBracket,
+                    this.SpaceAfterSemicolon,
+                    this.NoSpaceBeforeOpenParenInFuncDecl,
+                    this.SpaceBetweenStatements, this.SpaceAfterTryFinally
+                ];
+                this.SpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNextTokenNotCloseBracket), 2));
+                this.NoSpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.NoSpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8));
+                this.NoSpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8));
+                this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 2));
+                this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 8));
+                this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4), 1);
+                this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4), 1);
+                this.NewLineBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), 4), 1);
+                this.SpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 2));
+                this.NoSpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 8));
+                this.SpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceBetweenParens = new formatting.Rule(formatting.RuleDescriptor.create1(17, 18), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceBetweenBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(19, 20), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12, 13]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12, 13]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13, 14])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13, 14])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2));
+                this.NoSpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 8));
+            }
+            Rules.prototype.getRuleName = function (rule) {
+                var o = this;
+                for (var name_39 in o) {
+                    if (o[name_39] === rule) {
+                        return name_39;
+                    }
+                }
+                throw new Error("Unknown rule");
+            };
+            Rules.IsForContext = function (context) {
+                return context.contextNode.kind === 206;
+            };
+            Rules.IsNotForContext = function (context) {
+                return !Rules.IsForContext(context);
+            };
+            Rules.IsBinaryOpContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 187:
+                    case 188:
+                    case 195:
+                    case 154:
+                    case 162:
+                    case 163:
+                        return true;
+                    case 169:
+                    case 223:
+                    case 229:
+                    case 218:
+                    case 142:
+                    case 255:
+                    case 145:
+                    case 144:
+                        return context.currentTokenSpan.kind === 56 || context.nextTokenSpan.kind === 56;
+                    case 207:
+                        return context.currentTokenSpan.kind === 90 || context.nextTokenSpan.kind === 90;
+                    case 208:
+                        return context.currentTokenSpan.kind === 138 || context.nextTokenSpan.kind === 138;
+                }
+                return false;
+            };
+            Rules.IsNotBinaryOpContext = function (context) {
+                return !Rules.IsBinaryOpContext(context);
+            };
+            Rules.IsConditionalOperatorContext = function (context) {
+                return context.contextNode.kind === 188;
+            };
+            Rules.IsSameLineTokenOrBeforeMultilineBlockContext = function (context) {
+                return context.TokensAreOnSameLine() || Rules.IsBeforeMultilineBlockContext(context);
+            };
+            Rules.IsBeforeMultilineBlockContext = function (context) {
+                return Rules.IsBeforeBlockContext(context) && !(context.NextNodeAllOnSameLine() || context.NextNodeBlockIsOnOneLine());
+            };
+            Rules.IsMultilineBlockContext = function (context) {
+                return Rules.IsBlockContext(context) && !(context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
+            };
+            Rules.IsSingleLineBlockContext = function (context) {
+                return Rules.IsBlockContext(context) && (context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
+            };
+            Rules.IsBlockContext = function (context) {
+                return Rules.NodeIsBlockContext(context.contextNode);
+            };
+            Rules.IsBeforeBlockContext = function (context) {
+                return Rules.NodeIsBlockContext(context.nextTokenParent);
+            };
+            Rules.NodeIsBlockContext = function (node) {
+                if (Rules.NodeIsTypeScriptDeclWithBlockContext(node)) {
+                    return true;
+                }
+                switch (node.kind) {
+                    case 199:
+                    case 227:
+                    case 171:
+                    case 226:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsFunctionDeclContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 220:
+                    case 147:
+                    case 146:
+                    case 149:
+                    case 150:
+                    case 151:
+                    case 179:
+                    case 148:
+                    case 180:
+                    case 222:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsFunctionDeclarationOrFunctionExpressionContext = function (context) {
+                return context.contextNode.kind === 220 || context.contextNode.kind === 179;
+            };
+            Rules.IsTypeScriptDeclWithBlockContext = function (context) {
+                return Rules.NodeIsTypeScriptDeclWithBlockContext(context.contextNode);
+            };
+            Rules.NodeIsTypeScriptDeclWithBlockContext = function (node) {
+                switch (node.kind) {
+                    case 221:
+                    case 192:
+                    case 222:
+                    case 224:
+                    case 159:
+                    case 225:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsAfterCodeBlockContext = function (context) {
+                switch (context.currentTokenParent.kind) {
+                    case 221:
+                    case 225:
+                    case 224:
+                    case 199:
+                    case 252:
+                    case 226:
+                    case 213:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsControlDeclContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 203:
+                    case 213:
+                    case 206:
+                    case 207:
+                    case 208:
+                    case 205:
+                    case 216:
+                    case 204:
+                    case 212:
+                    case 252:
+                        return true;
+                    default:
+                        return false;
+                }
+            };
+            Rules.IsObjectContext = function (context) {
+                return context.contextNode.kind === 171;
+            };
+            Rules.IsFunctionCallContext = function (context) {
+                return context.contextNode.kind === 174;
+            };
+            Rules.IsNewContext = function (context) {
+                return context.contextNode.kind === 175;
+            };
+            Rules.IsFunctionCallOrNewContext = function (context) {
+                return Rules.IsFunctionCallContext(context) || Rules.IsNewContext(context);
+            };
+            Rules.IsPreviousTokenNotComma = function (context) {
+                return context.currentTokenSpan.kind !== 24;
+            };
+            Rules.IsNextTokenNotCloseBracket = function (context) {
+                return context.nextTokenSpan.kind !== 20;
+            };
+            Rules.IsArrowFunctionContext = function (context) {
+                return context.contextNode.kind === 180;
+            };
+            Rules.IsNonJsxSameLineTokenContext = function (context) {
+                return context.TokensAreOnSameLine() && context.contextNode.kind !== 244;
+            };
+            Rules.IsNotBeforeBlockInFunctionDeclarationContext = function (context) {
+                return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context);
+            };
+            Rules.IsEndOfDecoratorContextOnSameLine = function (context) {
+                return context.TokensAreOnSameLine() &&
+                    context.contextNode.decorators &&
+                    Rules.NodeIsInDecoratorContext(context.currentTokenParent) &&
+                    !Rules.NodeIsInDecoratorContext(context.nextTokenParent);
+            };
+            Rules.NodeIsInDecoratorContext = function (node) {
+                while (ts.isExpression(node)) {
+                    node = node.parent;
+                }
+                return node.kind === 143;
+            };
+            Rules.IsStartOfVariableDeclarationList = function (context) {
+                return context.currentTokenParent.kind === 219 &&
+                    context.currentTokenParent.getStart(context.sourceFile) === context.currentTokenSpan.pos;
+            };
+            Rules.IsNotFormatOnEnter = function (context) {
+                return context.formattingRequestKind !== 2;
+            };
+            Rules.IsModuleDeclContext = function (context) {
+                return context.contextNode.kind === 225;
+            };
+            Rules.IsObjectTypeContext = function (context) {
+                return context.contextNode.kind === 159;
+            };
+            Rules.IsTypeArgumentOrParameterOrAssertion = function (token, parent) {
+                if (token.kind !== 25 && token.kind !== 27) {
+                    return false;
+                }
+                switch (parent.kind) {
+                    case 155:
+                    case 177:
+                    case 221:
+                    case 192:
+                    case 222:
+                    case 220:
+                    case 179:
+                    case 180:
+                    case 147:
+                    case 146:
+                    case 151:
+                    case 152:
+                    case 174:
+                    case 175:
+                    case 194:
+                        return true;
+                    default:
+                        return false;
+                }
+            };
+            Rules.IsTypeArgumentOrParameterOrAssertionContext = function (context) {
+                return Rules.IsTypeArgumentOrParameterOrAssertion(context.currentTokenSpan, context.currentTokenParent) ||
+                    Rules.IsTypeArgumentOrParameterOrAssertion(context.nextTokenSpan, context.nextTokenParent);
+            };
+            Rules.IsTypeAssertionContext = function (context) {
+                return context.contextNode.kind === 177;
+            };
+            Rules.IsVoidOpContext = function (context) {
+                return context.currentTokenSpan.kind === 103 && context.currentTokenParent.kind === 183;
+            };
+            Rules.IsYieldOrYieldStarWithOperand = function (context) {
+                return context.contextNode.kind === 190 && context.contextNode.expression !== undefined;
+            };
+            return Rules;
+        }());
+        formatting.Rules = Rules;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RulesMap = (function () {
+            function RulesMap() {
+                this.map = [];
+                this.mapRowLength = 0;
+            }
+            RulesMap.create = function (rules) {
+                var result = new RulesMap();
+                result.Initialize(rules);
+                return result;
+            };
+            RulesMap.prototype.Initialize = function (rules) {
+                this.mapRowLength = 138 + 1;
+                this.map = new Array(this.mapRowLength * this.mapRowLength);
+                var rulesBucketConstructionStateList = new Array(this.map.length);
+                this.FillRules(rules, rulesBucketConstructionStateList);
+                return this.map;
+            };
+            RulesMap.prototype.FillRules = function (rules, rulesBucketConstructionStateList) {
+                var _this = this;
+                rules.forEach(function (rule) {
+                    _this.FillRule(rule, rulesBucketConstructionStateList);
+                });
+            };
+            RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
+                var rulesBucketIndex = (row * this.mapRowLength) + column;
+                return rulesBucketIndex;
+            };
+            RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
+                var _this = this;
+                var specificRule = rule.Descriptor.LeftTokenRange !== formatting.Shared.TokenRange.Any &&
+                    rule.Descriptor.RightTokenRange !== formatting.Shared.TokenRange.Any;
+                rule.Descriptor.LeftTokenRange.GetTokens().forEach(function (left) {
+                    rule.Descriptor.RightTokenRange.GetTokens().forEach(function (right) {
+                        var rulesBucketIndex = _this.GetRuleBucketIndex(left, right);
+                        var rulesBucket = _this.map[rulesBucketIndex];
+                        if (rulesBucket === undefined) {
+                            rulesBucket = _this.map[rulesBucketIndex] = new RulesBucket();
+                        }
+                        rulesBucket.AddRule(rule, specificRule, rulesBucketConstructionStateList, rulesBucketIndex);
+                    });
+                });
+            };
+            RulesMap.prototype.GetRule = function (context) {
+                var bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
+                var bucket = this.map[bucketIndex];
+                if (bucket) {
+                    for (var _i = 0, _a = bucket.Rules(); _i < _a.length; _i++) {
+                        var rule = _a[_i];
+                        if (rule.Operation.Context.InContext(context)) {
+                            return rule;
+                        }
+                    }
+                }
+                return undefined;
+            };
+            return RulesMap;
+        }());
+        formatting.RulesMap = RulesMap;
+        var MaskBitSize = 5;
+        var Mask = 0x1f;
+        (function (RulesPosition) {
+            RulesPosition[RulesPosition["IgnoreRulesSpecific"] = 0] = "IgnoreRulesSpecific";
+            RulesPosition[RulesPosition["IgnoreRulesAny"] = MaskBitSize * 1] = "IgnoreRulesAny";
+            RulesPosition[RulesPosition["ContextRulesSpecific"] = MaskBitSize * 2] = "ContextRulesSpecific";
+            RulesPosition[RulesPosition["ContextRulesAny"] = MaskBitSize * 3] = "ContextRulesAny";
+            RulesPosition[RulesPosition["NoContextRulesSpecific"] = MaskBitSize * 4] = "NoContextRulesSpecific";
+            RulesPosition[RulesPosition["NoContextRulesAny"] = MaskBitSize * 5] = "NoContextRulesAny";
+        })(formatting.RulesPosition || (formatting.RulesPosition = {}));
+        var RulesPosition = formatting.RulesPosition;
+        var RulesBucketConstructionState = (function () {
+            function RulesBucketConstructionState() {
+                this.rulesInsertionIndexBitmap = 0;
+            }
+            RulesBucketConstructionState.prototype.GetInsertionIndex = function (maskPosition) {
+                var index = 0;
+                var pos = 0;
+                var indexBitmap = this.rulesInsertionIndexBitmap;
+                while (pos <= maskPosition) {
+                    index += (indexBitmap & Mask);
+                    indexBitmap >>= MaskBitSize;
+                    pos += MaskBitSize;
+                }
+                return index;
+            };
+            RulesBucketConstructionState.prototype.IncreaseInsertionIndex = function (maskPosition) {
+                var value = (this.rulesInsertionIndexBitmap >> maskPosition) & Mask;
+                value++;
+                ts.Debug.assert((value & Mask) === value, "Adding more rules into the sub-bucket than allowed. Maximum allowed is 32 rules.");
+                var temp = this.rulesInsertionIndexBitmap & ~(Mask << maskPosition);
+                temp |= value << maskPosition;
+                this.rulesInsertionIndexBitmap = temp;
+            };
+            return RulesBucketConstructionState;
+        }());
+        formatting.RulesBucketConstructionState = RulesBucketConstructionState;
+        var RulesBucket = (function () {
+            function RulesBucket() {
+                this.rules = [];
+            }
+            RulesBucket.prototype.Rules = function () {
+                return this.rules;
+            };
+            RulesBucket.prototype.AddRule = function (rule, specificTokens, constructionState, rulesBucketIndex) {
+                var position;
+                if (rule.Operation.Action === 1) {
+                    position = specificTokens ?
+                        RulesPosition.IgnoreRulesSpecific :
+                        RulesPosition.IgnoreRulesAny;
+                }
+                else if (!rule.Operation.Context.IsAny()) {
+                    position = specificTokens ?
+                        RulesPosition.ContextRulesSpecific :
+                        RulesPosition.ContextRulesAny;
+                }
+                else {
+                    position = specificTokens ?
+                        RulesPosition.NoContextRulesSpecific :
+                        RulesPosition.NoContextRulesAny;
+                }
+                var state = constructionState[rulesBucketIndex];
+                if (state === undefined) {
+                    state = constructionState[rulesBucketIndex] = new RulesBucketConstructionState();
+                }
+                var index = state.GetInsertionIndex(position);
+                this.rules.splice(index, 0, rule);
+                state.IncreaseInsertionIndex(position);
+            };
+            return RulesBucket;
+        }());
+        formatting.RulesBucket = RulesBucket;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Shared;
+        (function (Shared) {
+            var TokenRangeAccess = (function () {
+                function TokenRangeAccess(from, to, except) {
+                    this.tokens = [];
+                    for (var token = from; token <= to; token++) {
+                        if (ts.indexOf(except, token) < 0) {
+                            this.tokens.push(token);
+                        }
+                    }
+                }
+                TokenRangeAccess.prototype.GetTokens = function () {
+                    return this.tokens;
+                };
+                TokenRangeAccess.prototype.Contains = function (token) {
+                    return this.tokens.indexOf(token) >= 0;
+                };
+                return TokenRangeAccess;
+            }());
+            Shared.TokenRangeAccess = TokenRangeAccess;
+            var TokenValuesAccess = (function () {
+                function TokenValuesAccess(tks) {
+                    this.tokens = tks && tks.length ? tks : [];
+                }
+                TokenValuesAccess.prototype.GetTokens = function () {
+                    return this.tokens;
+                };
+                TokenValuesAccess.prototype.Contains = function (token) {
+                    return this.tokens.indexOf(token) >= 0;
+                };
+                return TokenValuesAccess;
+            }());
+            Shared.TokenValuesAccess = TokenValuesAccess;
+            var TokenSingleValueAccess = (function () {
+                function TokenSingleValueAccess(token) {
+                    this.token = token;
+                }
+                TokenSingleValueAccess.prototype.GetTokens = function () {
+                    return [this.token];
+                };
+                TokenSingleValueAccess.prototype.Contains = function (tokenValue) {
+                    return tokenValue === this.token;
+                };
+                return TokenSingleValueAccess;
+            }());
+            Shared.TokenSingleValueAccess = TokenSingleValueAccess;
+            var TokenAllAccess = (function () {
+                function TokenAllAccess() {
+                }
+                TokenAllAccess.prototype.GetTokens = function () {
+                    var result = [];
+                    for (var token = 0; token <= 138; token++) {
+                        result.push(token);
+                    }
+                    return result;
+                };
+                TokenAllAccess.prototype.Contains = function (tokenValue) {
+                    return true;
+                };
+                TokenAllAccess.prototype.toString = function () {
+                    return "[allTokens]";
+                };
+                return TokenAllAccess;
+            }());
+            Shared.TokenAllAccess = TokenAllAccess;
+            var TokenRange = (function () {
+                function TokenRange(tokenAccess) {
+                    this.tokenAccess = tokenAccess;
+                }
+                TokenRange.FromToken = function (token) {
+                    return new TokenRange(new TokenSingleValueAccess(token));
+                };
+                TokenRange.FromTokens = function (tokens) {
+                    return new TokenRange(new TokenValuesAccess(tokens));
+                };
+                TokenRange.FromRange = function (f, to, except) {
+                    if (except === void 0) { except = []; }
+                    return new TokenRange(new TokenRangeAccess(f, to, except));
+                };
+                TokenRange.AllTokens = function () {
+                    return new TokenRange(new TokenAllAccess());
+                };
+                TokenRange.prototype.GetTokens = function () {
+                    return this.tokenAccess.GetTokens();
+                };
+                TokenRange.prototype.Contains = function (token) {
+                    return this.tokenAccess.Contains(token);
+                };
+                TokenRange.prototype.toString = function () {
+                    return this.tokenAccess.toString();
+                };
+                TokenRange.Any = TokenRange.AllTokens();
+                TokenRange.AnyIncludingMultilineComments = TokenRange.FromTokens(TokenRange.Any.GetTokens().concat([3]));
+                TokenRange.Keywords = TokenRange.FromRange(70, 138);
+                TokenRange.BinaryOperators = TokenRange.FromRange(25, 68);
+                TokenRange.BinaryKeywordOperators = TokenRange.FromTokens([90, 91, 138, 116, 124]);
+                TokenRange.UnaryPrefixOperators = TokenRange.FromTokens([41, 42, 50, 49]);
+                TokenRange.UnaryPrefixExpressions = TokenRange.FromTokens([8, 69, 17, 19, 15, 97, 92]);
+                TokenRange.UnaryPreincrementExpressions = TokenRange.FromTokens([69, 17, 97, 92]);
+                TokenRange.UnaryPostincrementExpressions = TokenRange.FromTokens([69, 18, 20, 92]);
+                TokenRange.UnaryPredecrementExpressions = TokenRange.FromTokens([69, 17, 97, 92]);
+                TokenRange.UnaryPostdecrementExpressions = TokenRange.FromTokens([69, 18, 20, 92]);
+                TokenRange.Comments = TokenRange.FromTokens([2, 3]);
+                TokenRange.TypeNames = TokenRange.FromTokens([69, 130, 132, 120, 133, 103, 117]);
+                return TokenRange;
+            }());
+            Shared.TokenRange = TokenRange;
+        })(Shared = formatting.Shared || (formatting.Shared = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RulesProvider = (function () {
+            function RulesProvider() {
+                this.globalRules = new formatting.Rules();
+            }
+            RulesProvider.prototype.getRuleName = function (rule) {
+                return this.globalRules.getRuleName(rule);
+            };
+            RulesProvider.prototype.getRuleByName = function (name) {
+                return this.globalRules[name];
+            };
+            RulesProvider.prototype.getRulesMap = function () {
+                return this.rulesMap;
+            };
+            RulesProvider.prototype.ensureUpToDate = function (options) {
+                if (!this.options || !ts.compareDataObjects(this.options, options)) {
+                    var activeRules = this.createActiveRules(options);
+                    var rulesMap = formatting.RulesMap.create(activeRules);
+                    this.activeRules = activeRules;
+                    this.rulesMap = rulesMap;
+                    this.options = ts.clone(options);
+                }
+            };
+            RulesProvider.prototype.createActiveRules = function (options) {
+                var rules = this.globalRules.HighPriorityCommonRules.slice(0);
+                if (options.InsertSpaceAfterCommaDelimiter) {
+                    rules.push(this.globalRules.SpaceAfterComma);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterComma);
+                }
+                if (options.InsertSpaceAfterFunctionKeywordForAnonymousFunctions) {
+                    rules.push(this.globalRules.SpaceAfterAnonymousFunctionKeyword);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterAnonymousFunctionKeyword);
+                }
+                if (options.InsertSpaceAfterKeywordsInControlFlowStatements) {
+                    rules.push(this.globalRules.SpaceAfterKeywordInControl);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterKeywordInControl);
+                }
+                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis) {
+                    rules.push(this.globalRules.SpaceAfterOpenParen);
+                    rules.push(this.globalRules.SpaceBeforeCloseParen);
+                    rules.push(this.globalRules.NoSpaceBetweenParens);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterOpenParen);
+                    rules.push(this.globalRules.NoSpaceBeforeCloseParen);
+                    rules.push(this.globalRules.NoSpaceBetweenParens);
+                }
+                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets) {
+                    rules.push(this.globalRules.SpaceAfterOpenBracket);
+                    rules.push(this.globalRules.SpaceBeforeCloseBracket);
+                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterOpenBracket);
+                    rules.push(this.globalRules.NoSpaceBeforeCloseBracket);
+                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
+                }
+                if (options.InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces) {
+                    rules.push(this.globalRules.SpaceAfterTemplateHeadAndMiddle);
+                    rules.push(this.globalRules.SpaceBeforeTemplateMiddleAndTail);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterTemplateHeadAndMiddle);
+                    rules.push(this.globalRules.NoSpaceBeforeTemplateMiddleAndTail);
+                }
+                if (options.InsertSpaceAfterSemicolonInForStatements) {
+                    rules.push(this.globalRules.SpaceAfterSemicolonInFor);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterSemicolonInFor);
+                }
+                if (options.InsertSpaceBeforeAndAfterBinaryOperators) {
+                    rules.push(this.globalRules.SpaceBeforeBinaryOperator);
+                    rules.push(this.globalRules.SpaceAfterBinaryOperator);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceBeforeBinaryOperator);
+                    rules.push(this.globalRules.NoSpaceAfterBinaryOperator);
+                }
+                if (options.PlaceOpenBraceOnNewLineForControlBlocks) {
+                    rules.push(this.globalRules.NewLineBeforeOpenBraceInControl);
+                }
+                if (options.PlaceOpenBraceOnNewLineForFunctions) {
+                    rules.push(this.globalRules.NewLineBeforeOpenBraceInFunction);
+                    rules.push(this.globalRules.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock);
+                }
+                rules = rules.concat(this.globalRules.LowPriorityCommonRules);
+                return rules;
+            };
+            return RulesProvider;
+        }());
+        formatting.RulesProvider = RulesProvider;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        function formatOnEnter(position, sourceFile, rulesProvider, options) {
+            var line = sourceFile.getLineAndCharacterOfPosition(position).line;
+            if (line === 0) {
+                return [];
+            }
+            var endOfFormatSpan = ts.getEndLinePosition(line, sourceFile);
+            while (ts.isWhiteSpace(sourceFile.text.charCodeAt(endOfFormatSpan)) && !ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+                endOfFormatSpan--;
+            }
+            if (ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+                endOfFormatSpan--;
+            }
+            var span = {
+                pos: ts.getStartPositionOfLine(line - 1, sourceFile),
+                end: endOfFormatSpan + 1
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 2);
+        }
+        formatting.formatOnEnter = formatOnEnter;
+        function formatOnSemicolon(position, sourceFile, rulesProvider, options) {
+            return formatOutermostParent(position, 23, sourceFile, options, rulesProvider, 3);
+        }
+        formatting.formatOnSemicolon = formatOnSemicolon;
+        function formatOnClosingCurly(position, sourceFile, rulesProvider, options) {
+            return formatOutermostParent(position, 16, sourceFile, options, rulesProvider, 4);
+        }
+        formatting.formatOnClosingCurly = formatOnClosingCurly;
+        function formatDocument(sourceFile, rulesProvider, options) {
+            var span = {
+                pos: 0,
+                end: sourceFile.text.length
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 0);
+        }
+        formatting.formatDocument = formatDocument;
+        function formatSelection(start, end, sourceFile, rulesProvider, options) {
+            var span = {
+                pos: ts.getLineStartPositionForPosition(start, sourceFile),
+                end: end
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 1);
+        }
+        formatting.formatSelection = formatSelection;
+        function formatOutermostParent(position, expectedLastToken, sourceFile, options, rulesProvider, requestKind) {
+            var parent = findOutermostParent(position, expectedLastToken, sourceFile);
+            if (!parent) {
+                return [];
+            }
+            var span = {
+                pos: ts.getLineStartPositionForPosition(parent.getStart(sourceFile), sourceFile),
+                end: parent.end
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, requestKind);
+        }
+        function findOutermostParent(position, expectedTokenKind, sourceFile) {
+            var precedingToken = ts.findPrecedingToken(position, sourceFile);
+            if (!precedingToken ||
+                precedingToken.kind !== expectedTokenKind ||
+                position !== precedingToken.getEnd()) {
+                return undefined;
+            }
+            var current = precedingToken;
+            while (current &&
+                current.parent &&
+                current.parent.end === precedingToken.end &&
+                !isListElement(current.parent, current)) {
+                current = current.parent;
+            }
+            return current;
+        }
+        function isListElement(parent, node) {
+            switch (parent.kind) {
+                case 221:
+                case 222:
+                    return ts.rangeContainsRange(parent.members, node);
+                case 225:
+                    var body = parent.body;
+                    return body && body.kind === 199 && ts.rangeContainsRange(body.statements, node);
+                case 256:
+                case 199:
+                case 226:
+                    return ts.rangeContainsRange(parent.statements, node);
+                case 252:
+                    return ts.rangeContainsRange(parent.block.statements, node);
+            }
+            return false;
+        }
+        function findEnclosingNode(range, sourceFile) {
+            return find(sourceFile);
+            function find(n) {
+                var candidate = ts.forEachChild(n, function (c) { return ts.startEndContainsRange(c.getStart(sourceFile), c.end, range) && c; });
+                if (candidate) {
+                    var result = find(candidate);
+                    if (result) {
+                        return result;
+                    }
+                }
+                return n;
+            }
+        }
+        function prepareRangeContainsErrorFunction(errors, originalRange) {
+            if (!errors.length) {
+                return rangeHasNoErrors;
+            }
+            var sorted = errors
+                .filter(function (d) { return ts.rangeOverlapsWithStartEnd(originalRange, d.start, d.start + d.length); })
+                .sort(function (e1, e2) { return e1.start - e2.start; });
+            if (!sorted.length) {
+                return rangeHasNoErrors;
+            }
+            var index = 0;
+            return function (r) {
+                while (true) {
+                    if (index >= sorted.length) {
+                        return false;
+                    }
+                    var error = sorted[index];
+                    if (r.end <= error.start) {
+                        return false;
+                    }
+                    if (ts.startEndOverlapsWithStartEnd(r.pos, r.end, error.start, error.start + error.length)) {
+                        return true;
+                    }
+                    index++;
+                }
+            };
+            function rangeHasNoErrors(r) {
+                return false;
+            }
+        }
+        function getScanStartPosition(enclosingNode, originalRange, sourceFile) {
+            var start = enclosingNode.getStart(sourceFile);
+            if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
+                return start;
+            }
+            var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile);
+            if (!precedingToken) {
+                return enclosingNode.pos;
+            }
+            if (precedingToken.end >= originalRange.pos) {
+                return enclosingNode.pos;
+            }
+            return precedingToken.end;
+        }
+        function getOwnOrInheritedDelta(n, options, sourceFile) {
+            var previousLine = -1;
+            var child;
+            while (n) {
+                var line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
+                if (previousLine !== -1 && line !== previousLine) {
+                    break;
+                }
+                if (formatting.SmartIndenter.shouldIndentChildNode(n, child)) {
+                    return options.IndentSize;
+                }
+                previousLine = line;
+                child = n;
+                n = n.parent;
+            }
+            return 0;
+        }
+        function formatSpan(originalRange, sourceFile, options, rulesProvider, requestKind) {
+            var rangeContainsError = prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange);
+            var formattingContext = new formatting.FormattingContext(sourceFile, requestKind);
+            var enclosingNode = findEnclosingNode(originalRange, sourceFile);
+            var formattingScanner = formatting.getFormattingScanner(sourceFile, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end);
+            var initialIndentation = formatting.SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options);
+            var previousRangeHasError;
+            var previousRange;
+            var previousParent;
+            var previousRangeStartLine;
+            var lastIndentedLine;
+            var indentationOnLastIndentedLine;
+            var edits = [];
+            formattingScanner.advance();
+            if (formattingScanner.isOnToken()) {
+                var startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
+                var undecoratedStartLine = startLine;
+                if (enclosingNode.decorators) {
+                    undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
+                }
+                var delta = getOwnOrInheritedDelta(enclosingNode, options, sourceFile);
+                processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
+            }
+            if (!formattingScanner.isOnToken()) {
+                var leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
+                if (leadingTrivia) {
+                    processTrivia(leadingTrivia, enclosingNode, enclosingNode, undefined);
+                    trimTrailingWhitespacesForRemainingRange();
+                }
+            }
+            formattingScanner.close();
+            return edits;
+            function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) {
+                if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) ||
+                    ts.rangeContainsStartEnd(range, startPos, endPos)) {
+                    if (inheritedIndentation !== -1) {
+                        return inheritedIndentation;
+                    }
+                }
+                else {
+                    var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
+                    var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile);
+                    var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
+                    if (startLine !== parentStartLine || startPos === column) {
+                        return column;
+                    }
+                }
+                return -1;
+            }
+            function computeIndentation(node, startLine, inheritedIndentation, parent, parentDynamicIndentation, effectiveParentStartLine) {
+                var indentation = inheritedIndentation;
+                var delta = formatting.SmartIndenter.shouldIndentChildNode(node) ? options.IndentSize : 0;
+                if (effectiveParentStartLine === startLine) {
+                    indentation = startLine === lastIndentedLine
+                        ? indentationOnLastIndentedLine
+                        : parentDynamicIndentation.getIndentation();
+                    delta = Math.min(options.IndentSize, parentDynamicIndentation.getDelta(node) + delta);
+                }
+                else if (indentation === -1) {
+                    if (formatting.SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement(parent, node, startLine, sourceFile)) {
+                        indentation = parentDynamicIndentation.getIndentation();
+                    }
+                    else {
+                        indentation = parentDynamicIndentation.getIndentation() + parentDynamicIndentation.getDelta(node);
+                    }
+                }
+                return {
+                    indentation: indentation,
+                    delta: delta
+                };
+            }
+            function getFirstNonDecoratorTokenOfNode(node) {
+                if (node.modifiers && node.modifiers.length) {
+                    return node.modifiers[0].kind;
+                }
+                switch (node.kind) {
+                    case 221: return 73;
+                    case 222: return 107;
+                    case 220: return 87;
+                    case 224: return 224;
+                    case 149: return 123;
+                    case 150: return 131;
+                    case 147:
+                        if (node.asteriskToken) {
+                            return 37;
+                        }
+                    case 145:
+                    case 142:
+                        return node.name.kind;
+                }
+            }
+            function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
+                return {
+                    getIndentationForComment: function (kind, tokenIndentation, container) {
+                        switch (kind) {
+                            case 16:
+                            case 20:
+                            case 18:
+                                return indentation + getEffectiveDelta(delta, container);
+                        }
+                        return tokenIndentation !== -1 ? tokenIndentation : indentation;
+                    },
+                    getIndentationForToken: function (line, kind, container) {
+                        if (nodeStartLine !== line && node.decorators) {
+                            if (kind === getFirstNonDecoratorTokenOfNode(node)) {
+                                return indentation;
+                            }
+                        }
+                        switch (kind) {
+                            case 15:
+                            case 16:
+                            case 19:
+                            case 20:
+                            case 17:
+                            case 18:
+                            case 80:
+                            case 104:
+                            case 55:
+                                return indentation;
+                            default:
+                                return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
+                        }
+                    },
+                    getIndentation: function () { return indentation; },
+                    getDelta: function (child) { return getEffectiveDelta(delta, child); },
+                    recomputeIndentation: function (lineAdded) {
+                        if (node.parent && formatting.SmartIndenter.shouldIndentChildNode(node.parent, node)) {
+                            if (lineAdded) {
+                                indentation += options.IndentSize;
+                            }
+                            else {
+                                indentation -= options.IndentSize;
+                            }
+                            if (formatting.SmartIndenter.shouldIndentChildNode(node)) {
+                                delta = options.IndentSize;
+                            }
+                            else {
+                                delta = 0;
+                            }
+                        }
+                    }
+                };
+                function getEffectiveDelta(delta, child) {
+                    return formatting.SmartIndenter.nodeWillIndentChild(node, child, true) ? delta : 0;
+                }
+            }
+            function processNode(node, contextNode, nodeStartLine, undecoratedNodeStartLine, indentation, delta) {
+                if (!ts.rangeOverlapsWithStartEnd(originalRange, node.getStart(sourceFile), node.getEnd())) {
+                    return;
+                }
+                var nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
+                var childContextNode = contextNode;
+                ts.forEachChild(node, function (child) {
+                    processChildNode(child, -1, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, false);
+                }, function (nodes) {
+                    processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
+                });
+                while (formattingScanner.isOnToken()) {
+                    var tokenInfo = formattingScanner.readTokenInfo(node);
+                    if (tokenInfo.token.end > node.end) {
+                        break;
+                    }
+                    consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation);
+                }
+                function processChildNode(child, inheritedIndentation, parent, parentDynamicIndentation, parentStartLine, undecoratedParentStartLine, isListItem, isFirstListItem) {
+                    var childStartPos = child.getStart(sourceFile);
+                    var childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
+                    var undecoratedChildStartLine = childStartLine;
+                    if (child.decorators) {
+                        undecoratedChildStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(child, sourceFile)).line;
+                    }
+                    var childIndentationAmount = -1;
+                    if (isListItem) {
+                        childIndentationAmount = tryComputeIndentationForListItem(childStartPos, child.end, parentStartLine, originalRange, inheritedIndentation);
+                        if (childIndentationAmount !== -1) {
+                            inheritedIndentation = childIndentationAmount;
+                        }
+                    }
+                    if (!ts.rangeOverlapsWithStartEnd(originalRange, child.pos, child.end)) {
+                        return inheritedIndentation;
+                    }
+                    if (child.getFullWidth() === 0) {
+                        return inheritedIndentation;
+                    }
+                    while (formattingScanner.isOnToken()) {
+                        var tokenInfo = formattingScanner.readTokenInfo(node);
+                        if (tokenInfo.token.end > childStartPos) {
+                            break;
+                        }
+                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation);
+                    }
+                    if (!formattingScanner.isOnToken()) {
+                        return inheritedIndentation;
+                    }
+                    if (ts.isToken(child)) {
+                        var tokenInfo = formattingScanner.readTokenInfo(child);
+                        ts.Debug.assert(tokenInfo.token.end === child.end);
+                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
+                        return inheritedIndentation;
+                    }
+                    var effectiveParentStartLine = child.kind === 143 ? childStartLine : undecoratedParentStartLine;
+                    var childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
+                    processNode(child, childContextNode, childStartLine, undecoratedChildStartLine, childIndentation.indentation, childIndentation.delta);
+                    childContextNode = node;
+                    if (isFirstListItem && parent.kind === 170 && inheritedIndentation === -1) {
+                        inheritedIndentation = childIndentation.indentation;
+                    }
+                    return inheritedIndentation;
+                }
+                function processChildNodes(nodes, parent, parentStartLine, parentDynamicIndentation) {
+                    var listStartToken = getOpenTokenForList(parent, nodes);
+                    var listEndToken = getCloseTokenForOpenToken(listStartToken);
+                    var listDynamicIndentation = parentDynamicIndentation;
+                    var startLine = parentStartLine;
+                    if (listStartToken !== 0) {
+                        while (formattingScanner.isOnToken()) {
+                            var tokenInfo = formattingScanner.readTokenInfo(parent);
+                            if (tokenInfo.token.end > nodes.pos) {
+                                break;
+                            }
+                            else if (tokenInfo.token.kind === listStartToken) {
+                                startLine = sourceFile.getLineAndCharacterOfPosition(tokenInfo.token.pos).line;
+                                var indentation_1 = computeIndentation(tokenInfo.token, startLine, -1, parent, parentDynamicIndentation, parentStartLine);
+                                listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation_1.indentation, indentation_1.delta);
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
+                            }
+                            else {
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation);
+                            }
+                        }
+                    }
+                    var inheritedIndentation = -1;
+                    for (var i = 0; i < nodes.length; i++) {
+                        var child = nodes[i];
+                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, true, i === 0);
+                    }
+                    if (listEndToken !== 0) {
+                        if (formattingScanner.isOnToken()) {
+                            var tokenInfo = formattingScanner.readTokenInfo(parent);
+                            if (tokenInfo.token.kind === listEndToken && ts.rangeContainsRange(parent, tokenInfo.token)) {
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
+                            }
+                        }
+                    }
+                }
+                function consumeTokenAndAdvanceScanner(currentTokenInfo, parent, dynamicIndentation, container) {
+                    ts.Debug.assert(ts.rangeContainsRange(parent, currentTokenInfo.token));
+                    var lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
+                    var indentToken = false;
+                    if (currentTokenInfo.leadingTrivia) {
+                        processTrivia(currentTokenInfo.leadingTrivia, parent, childContextNode, dynamicIndentation);
+                    }
+                    var lineAdded;
+                    var isTokenInRange = ts.rangeContainsRange(originalRange, currentTokenInfo.token);
+                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
+                    if (isTokenInRange) {
+                        var rangeHasError = rangeContainsError(currentTokenInfo.token);
+                        var savePreviousRange = previousRange;
+                        lineAdded = processRange(currentTokenInfo.token, tokenStart, parent, childContextNode, dynamicIndentation);
+                        if (rangeHasError) {
+                            indentToken = false;
+                        }
+                        else {
+                            if (lineAdded !== undefined) {
+                                indentToken = lineAdded;
+                            }
+                            else {
+                                var prevEndLine = savePreviousRange && sourceFile.getLineAndCharacterOfPosition(savePreviousRange.end).line;
+                                indentToken = lastTriviaWasNewLine && tokenStart.line !== prevEndLine;
+                            }
+                        }
+                    }
+                    if (currentTokenInfo.trailingTrivia) {
+                        processTrivia(currentTokenInfo.trailingTrivia, parent, childContextNode, dynamicIndentation);
+                    }
+                    if (indentToken) {
+                        var tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
+                            dynamicIndentation.getIndentationForToken(tokenStart.line, currentTokenInfo.token.kind, container) :
+                            -1;
+                        var indentNextTokenOrTrivia = true;
+                        if (currentTokenInfo.leadingTrivia) {
+                            var commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
+                            for (var _i = 0, _a = currentTokenInfo.leadingTrivia; _i < _a.length; _i++) {
+                                var triviaItem = _a[_i];
+                                var triviaInRange = ts.rangeContainsRange(originalRange, triviaItem);
+                                switch (triviaItem.kind) {
+                                    case 3:
+                                        if (triviaInRange) {
+                                            indentMultilineComment(triviaItem, commentIndentation, !indentNextTokenOrTrivia);
+                                        }
+                                        indentNextTokenOrTrivia = false;
+                                        break;
+                                    case 2:
+                                        if (indentNextTokenOrTrivia && triviaInRange) {
+                                            insertIndentation(triviaItem.pos, commentIndentation, false);
+                                        }
+                                        indentNextTokenOrTrivia = false;
+                                        break;
+                                    case 4:
+                                        indentNextTokenOrTrivia = true;
+                                        break;
+                                }
+                            }
+                        }
+                        if (tokenIndentation !== -1 && indentNextTokenOrTrivia) {
+                            insertIndentation(currentTokenInfo.token.pos, tokenIndentation, lineAdded);
+                            lastIndentedLine = tokenStart.line;
+                            indentationOnLastIndentedLine = tokenIndentation;
+                        }
+                    }
+                    formattingScanner.advance();
+                    childContextNode = parent;
+                }
+            }
+            function processTrivia(trivia, parent, contextNode, dynamicIndentation) {
+                for (var _i = 0, trivia_1 = trivia; _i < trivia_1.length; _i++) {
+                    var triviaItem = trivia_1[_i];
+                    if (ts.isComment(triviaItem.kind) && ts.rangeContainsRange(originalRange, triviaItem)) {
+                        var triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
+                        processRange(triviaItem, triviaItemStart, parent, contextNode, dynamicIndentation);
+                    }
+                }
+            }
+            function processRange(range, rangeStart, parent, contextNode, dynamicIndentation) {
+                var rangeHasError = rangeContainsError(range);
+                var lineAdded;
+                if (!rangeHasError && !previousRangeHasError) {
+                    if (!previousRange) {
+                        var originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
+                        trimTrailingWhitespacesForLines(originalStart.line, rangeStart.line);
+                    }
+                    else {
+                        lineAdded =
+                            processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation);
+                    }
+                }
+                previousRange = range;
+                previousParent = parent;
+                previousRangeStartLine = rangeStart.line;
+                previousRangeHasError = rangeHasError;
+                return lineAdded;
+            }
+            function processPair(currentItem, currentStartLine, currentParent, previousItem, previousStartLine, previousParent, contextNode, dynamicIndentation) {
+                formattingContext.updateContext(previousItem, previousParent, currentItem, currentParent, contextNode);
+                var rule = rulesProvider.getRulesMap().GetRule(formattingContext);
+                var trimTrailingWhitespaces;
+                var lineAdded;
+                if (rule) {
+                    applyRuleEdits(rule, previousItem, previousStartLine, currentItem, currentStartLine);
+                    if (rule.Operation.Action & (2 | 8) && currentStartLine !== previousStartLine) {
+                        lineAdded = false;
+                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
+                            dynamicIndentation.recomputeIndentation(false);
+                        }
+                    }
+                    else if (rule.Operation.Action & 4 && currentStartLine === previousStartLine) {
+                        lineAdded = true;
+                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
+                            dynamicIndentation.recomputeIndentation(true);
+                        }
+                    }
+                    trimTrailingWhitespaces = !(rule.Operation.Action & 8) && rule.Flag !== 1;
+                }
+                else {
+                    trimTrailingWhitespaces = true;
+                }
+                if (currentStartLine !== previousStartLine && trimTrailingWhitespaces) {
+                    trimTrailingWhitespacesForLines(previousStartLine, currentStartLine, previousItem);
+                }
+                return lineAdded;
+            }
+            function insertIndentation(pos, indentation, lineAdded) {
+                var indentationString = getIndentationString(indentation, options);
+                if (lineAdded) {
+                    recordReplace(pos, 0, indentationString);
+                }
+                else {
+                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
+                    var startLinePosition = ts.getStartPositionOfLine(tokenStart.line, sourceFile);
+                    if (indentation !== tokenStart.character || indentationIsDifferent(indentationString, startLinePosition)) {
+                        recordReplace(startLinePosition, tokenStart.character, indentationString);
+                    }
+                }
+            }
+            function indentationIsDifferent(indentationString, startLinePosition) {
+                return indentationString !== sourceFile.text.substr(startLinePosition, indentationString.length);
+            }
+            function indentMultilineComment(commentRange, indentation, firstLineIsIndented) {
+                var startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
+                var endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
+                var parts;
+                if (startLine === endLine) {
+                    if (!firstLineIsIndented) {
+                        insertIndentation(commentRange.pos, indentation, false);
+                    }
+                    return;
+                }
+                else {
+                    parts = [];
+                    var startPos = commentRange.pos;
+                    for (var line = startLine; line < endLine; line++) {
+                        var endOfLine = ts.getEndLinePosition(line, sourceFile);
+                        parts.push({ pos: startPos, end: endOfLine });
+                        startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
+                    }
+                    parts.push({ pos: startPos, end: commentRange.end });
+                }
+                var startLinePos = ts.getStartPositionOfLine(startLine, sourceFile);
+                var nonWhitespaceColumnInFirstPart = formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(startLinePos, parts[0].pos, sourceFile, options);
+                if (indentation === nonWhitespaceColumnInFirstPart.column) {
+                    return;
+                }
+                var startIndex = 0;
+                if (firstLineIsIndented) {
+                    startIndex = 1;
+                    startLine++;
+                }
+                var delta = indentation - nonWhitespaceColumnInFirstPart.column;
+                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
+                    var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
+                    var nonWhitespaceCharacterAndColumn = i === 0
+                        ? nonWhitespaceColumnInFirstPart
+                        : formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(parts[i].pos, parts[i].end, sourceFile, options);
+                    var newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
+                    if (newIndentation > 0) {
+                        var indentationString = getIndentationString(newIndentation, options);
+                        recordReplace(startLinePos_1, nonWhitespaceCharacterAndColumn.character, indentationString);
+                    }
+                    else {
+                        recordDelete(startLinePos_1, nonWhitespaceCharacterAndColumn.character);
+                    }
+                }
+            }
+            function trimTrailingWhitespacesForLines(line1, line2, range) {
+                for (var line = line1; line < line2; line++) {
+                    var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
+                    var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
+                    if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
+                        continue;
+                    }
+                    var whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
+                    if (whitespaceStart !== -1) {
+                        ts.Debug.assert(whitespaceStart === lineStartPosition || !ts.isWhiteSpace(sourceFile.text.charCodeAt(whitespaceStart - 1)));
+                        recordDelete(whitespaceStart, lineEndPosition + 1 - whitespaceStart);
+                    }
+                }
+            }
+            function getTrailingWhitespaceStartPosition(start, end) {
+                var pos = end;
+                while (pos >= start && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
+                    pos--;
+                }
+                if (pos !== end) {
+                    return pos + 1;
+                }
+                return -1;
+            }
+            function trimTrailingWhitespacesForRemainingRange() {
+                var startPosition = previousRange ? previousRange.end : originalRange.pos;
+                var startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
+                var endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
+                trimTrailingWhitespacesForLines(startLine, endLine + 1, previousRange);
+            }
+            function newTextChange(start, len, newText) {
+                return { span: ts.createTextSpan(start, len), newText: newText };
+            }
+            function recordDelete(start, len) {
+                if (len) {
+                    edits.push(newTextChange(start, len, ""));
+                }
+            }
+            function recordReplace(start, len, newText) {
+                if (len || newText) {
+                    edits.push(newTextChange(start, len, newText));
+                }
+            }
+            function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
+                switch (rule.Operation.Action) {
+                    case 1:
+                        return;
+                    case 8:
+                        if (previousRange.end !== currentRange.pos) {
+                            recordDelete(previousRange.end, currentRange.pos - previousRange.end);
+                        }
+                        break;
+                    case 4:
+                        if (rule.Flag !== 1 && previousStartLine !== currentStartLine) {
+                            return;
+                        }
+                        var lineDelta = currentStartLine - previousStartLine;
+                        if (lineDelta !== 1) {
+                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, options.NewLineCharacter);
+                        }
+                        break;
+                    case 2:
+                        if (rule.Flag !== 1 && previousStartLine !== currentStartLine) {
+                            return;
+                        }
+                        var posDelta = currentRange.pos - previousRange.end;
+                        if (posDelta !== 1 || sourceFile.text.charCodeAt(previousRange.end) !== 32) {
+                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, " ");
+                        }
+                        break;
+                }
+            }
+        }
+        function getOpenTokenForList(node, list) {
+            switch (node.kind) {
+                case 148:
+                case 220:
+                case 179:
+                case 147:
+                case 146:
+                case 180:
+                    if (node.typeParameters === list) {
+                        return 25;
+                    }
+                    else if (node.parameters === list) {
+                        return 17;
+                    }
+                    break;
+                case 174:
+                case 175:
+                    if (node.typeArguments === list) {
+                        return 25;
+                    }
+                    else if (node.arguments === list) {
+                        return 17;
+                    }
+                    break;
+                case 155:
+                    if (node.typeArguments === list) {
+                        return 25;
+                    }
+            }
+            return 0;
+        }
+        function getCloseTokenForOpenToken(kind) {
+            switch (kind) {
+                case 17:
+                    return 18;
+                case 25:
+                    return 27;
+            }
+            return 0;
+        }
+        var internedSizes;
+        var internedTabsIndentation;
+        var internedSpacesIndentation;
+        function getIndentationString(indentation, options) {
+            var resetInternedStrings = !internedSizes || (internedSizes.tabSize !== options.TabSize || internedSizes.indentSize !== options.IndentSize);
+            if (resetInternedStrings) {
+                internedSizes = { tabSize: options.TabSize, indentSize: options.IndentSize };
+                internedTabsIndentation = internedSpacesIndentation = undefined;
+            }
+            if (!options.ConvertTabsToSpaces) {
+                var tabs = Math.floor(indentation / options.TabSize);
+                var spaces = indentation - tabs * options.TabSize;
+                var tabString = void 0;
+                if (!internedTabsIndentation) {
+                    internedTabsIndentation = [];
+                }
+                if (internedTabsIndentation[tabs] === undefined) {
+                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
+                }
+                else {
+                    tabString = internedTabsIndentation[tabs];
+                }
+                return spaces ? tabString + repeat(" ", spaces) : tabString;
+            }
+            else {
+                var spacesString = void 0;
+                var quotient = Math.floor(indentation / options.IndentSize);
+                var remainder = indentation % options.IndentSize;
+                if (!internedSpacesIndentation) {
+                    internedSpacesIndentation = [];
+                }
+                if (internedSpacesIndentation[quotient] === undefined) {
+                    spacesString = repeat(" ", options.IndentSize * quotient);
+                    internedSpacesIndentation[quotient] = spacesString;
+                }
+                else {
+                    spacesString = internedSpacesIndentation[quotient];
+                }
+                return remainder ? spacesString + repeat(" ", remainder) : spacesString;
+            }
+            function repeat(value, count) {
+                var s = "";
+                for (var i = 0; i < count; i++) {
+                    s += value;
+                }
+                return s;
+            }
+        }
+        formatting.getIndentationString = getIndentationString;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var SmartIndenter;
+        (function (SmartIndenter) {
+            function getIndentation(position, sourceFile, options) {
+                if (position > sourceFile.text.length) {
+                    return 0;
+                }
+                if (options.IndentStyle === ts.IndentStyle.None) {
+                    return 0;
+                }
+                var precedingToken = ts.findPrecedingToken(position, sourceFile);
+                if (!precedingToken) {
+                    return 0;
+                }
+                var precedingTokenIsLiteral = ts.isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
+                if (precedingTokenIsLiteral && precedingToken.getStart(sourceFile) <= position && precedingToken.end > position) {
+                    return 0;
+                }
+                var lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
+                if (options.IndentStyle === ts.IndentStyle.Block) {
+                    var current_1 = position;
+                    while (current_1 > 0) {
+                        var char = sourceFile.text.charCodeAt(current_1);
+                        if (!ts.isWhiteSpace(char) && !ts.isLineBreak(char)) {
+                            break;
+                        }
+                        current_1--;
+                    }
+                    var lineStart = ts.getLineStartPositionForPosition(current_1, sourceFile);
+                    return SmartIndenter.findFirstNonWhitespaceColumn(lineStart, current_1, sourceFile, options);
+                }
+                if (precedingToken.kind === 24 && precedingToken.parent.kind !== 187) {
+                    var actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
+                    if (actualIndentation !== -1) {
+                        return actualIndentation;
+                    }
+                }
+                var previous;
+                var current = precedingToken;
+                var currentStart;
+                var indentationDelta;
+                while (current) {
+                    if (ts.positionBelongsToNode(current, position, sourceFile) && shouldIndentChildNode(current, previous)) {
+                        currentStart = getStartLineAndCharacterForNode(current, sourceFile);
+                        if (nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile)) {
+                            indentationDelta = 0;
+                        }
+                        else {
+                            indentationDelta = lineAtPosition !== currentStart.line ? options.IndentSize : 0;
+                        }
+                        break;
+                    }
+                    var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
+                    if (actualIndentation !== -1) {
+                        return actualIndentation;
+                    }
+                    actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
+                    if (actualIndentation !== -1) {
+                        return actualIndentation + options.IndentSize;
+                    }
+                    previous = current;
+                    current = current.parent;
+                }
+                if (!current) {
+                    return 0;
+                }
+                return getIndentationForNodeWorker(current, currentStart, undefined, indentationDelta, sourceFile, options);
+            }
+            SmartIndenter.getIndentation = getIndentation;
+            function getIndentationForNode(n, ignoreActualIndentationRange, sourceFile, options) {
+                var start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+                return getIndentationForNodeWorker(n, start, ignoreActualIndentationRange, 0, sourceFile, options);
+            }
+            SmartIndenter.getIndentationForNode = getIndentationForNode;
+            function getIndentationForNodeWorker(current, currentStart, ignoreActualIndentationRange, indentationDelta, sourceFile, options) {
+                var parent = current.parent;
+                var parentStart;
+                while (parent) {
+                    var useActualIndentation = true;
+                    if (ignoreActualIndentationRange) {
+                        var start = current.getStart(sourceFile);
+                        useActualIndentation = start < ignoreActualIndentationRange.pos || start > ignoreActualIndentationRange.end;
+                    }
+                    if (useActualIndentation) {
+                        var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
+                        if (actualIndentation !== -1) {
+                            return actualIndentation + indentationDelta;
+                        }
+                    }
+                    parentStart = getParentStart(parent, current, sourceFile);
+                    var parentAndChildShareLine = parentStart.line === currentStart.line ||
+                        childStartsOnTheSameLineWithElseInIfStatement(parent, current, currentStart.line, sourceFile);
+                    if (useActualIndentation) {
+                        var actualIndentation = getActualIndentationForNode(current, parent, currentStart, parentAndChildShareLine, sourceFile, options);
+                        if (actualIndentation !== -1) {
+                            return actualIndentation + indentationDelta;
+                        }
+                        actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
+                        if (actualIndentation !== -1) {
+                            return actualIndentation + indentationDelta;
+                        }
+                    }
+                    if (shouldIndentChildNode(parent, current) && !parentAndChildShareLine) {
+                        indentationDelta += options.IndentSize;
+                    }
+                    current = parent;
+                    currentStart = parentStart;
+                    parent = current.parent;
+                }
+                return indentationDelta;
+            }
+            function getParentStart(parent, child, sourceFile) {
+                var containingList = getContainingList(child, sourceFile);
+                if (containingList) {
+                    return sourceFile.getLineAndCharacterOfPosition(containingList.pos);
+                }
+                return sourceFile.getLineAndCharacterOfPosition(parent.getStart(sourceFile));
+            }
+            function getActualIndentationForListItemBeforeComma(commaToken, sourceFile, options) {
+                var commaItemInfo = ts.findListItemInfo(commaToken);
+                if (commaItemInfo && commaItemInfo.listItemIndex > 0) {
+                    return deriveActualIndentationFromList(commaItemInfo.list.getChildren(), commaItemInfo.listItemIndex - 1, sourceFile, options);
+                }
+                else {
+                    return -1;
+                }
+            }
+            function getActualIndentationForNode(current, parent, currentLineAndChar, parentAndChildShareLine, sourceFile, options) {
+                var useActualIndentation = (ts.isDeclaration(current) || ts.isStatement(current)) &&
+                    (parent.kind === 256 || !parentAndChildShareLine);
+                if (!useActualIndentation) {
+                    return -1;
+                }
+                return findColumnForFirstNonWhitespaceCharacterInLine(currentLineAndChar, sourceFile, options);
+            }
+            function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile) {
+                var nextToken = ts.findNextToken(precedingToken, current);
+                if (!nextToken) {
+                    return false;
+                }
+                if (nextToken.kind === 15) {
+                    return true;
+                }
+                else if (nextToken.kind === 16) {
+                    var nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
+                    return lineAtPosition === nextTokenStartLine;
+                }
+                return false;
+            }
+            function getStartLineAndCharacterForNode(n, sourceFile) {
+                return sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+            }
+            function childStartsOnTheSameLineWithElseInIfStatement(parent, child, childStartLine, sourceFile) {
+                if (parent.kind === 203 && parent.elseStatement === child) {
+                    var elseKeyword = ts.findChildOfKind(parent, 80, sourceFile);
+                    ts.Debug.assert(elseKeyword !== undefined);
+                    var elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
+                    return elseKeywordStartLine === childStartLine;
+                }
+                return false;
+            }
+            SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement = childStartsOnTheSameLineWithElseInIfStatement;
+            function getContainingList(node, sourceFile) {
+                if (node.parent) {
+                    switch (node.parent.kind) {
+                        case 155:
+                            if (node.parent.typeArguments &&
+                                ts.rangeContainsStartEnd(node.parent.typeArguments, node.getStart(sourceFile), node.getEnd())) {
+                                return node.parent.typeArguments;
+                            }
+                            break;
+                        case 171:
+                            return node.parent.properties;
+                        case 170:
+                            return node.parent.elements;
+                        case 220:
+                        case 179:
+                        case 180:
+                        case 147:
+                        case 146:
+                        case 151:
+                        case 152: {
+                            var start = node.getStart(sourceFile);
+                            if (node.parent.typeParameters &&
+                                ts.rangeContainsStartEnd(node.parent.typeParameters, start, node.getEnd())) {
+                                return node.parent.typeParameters;
+                            }
+                            if (ts.rangeContainsStartEnd(node.parent.parameters, start, node.getEnd())) {
+                                return node.parent.parameters;
+                            }
+                            break;
+                        }
+                        case 175:
+                        case 174: {
+                            var start = node.getStart(sourceFile);
+                            if (node.parent.typeArguments &&
+                                ts.rangeContainsStartEnd(node.parent.typeArguments, start, node.getEnd())) {
+                                return node.parent.typeArguments;
+                            }
+                            if (node.parent.arguments &&
+                                ts.rangeContainsStartEnd(node.parent.arguments, start, node.getEnd())) {
+                                return node.parent.arguments;
+                            }
+                            break;
+                        }
+                    }
+                }
+                return undefined;
+            }
+            function getActualIndentationForListItem(node, sourceFile, options) {
+                var containingList = getContainingList(node, sourceFile);
+                return containingList ? getActualIndentationFromList(containingList) : -1;
+                function getActualIndentationFromList(list) {
+                    var index = ts.indexOf(list, node);
+                    return index !== -1 ? deriveActualIndentationFromList(list, index, sourceFile, options) : -1;
+                }
+            }
+            function getLineIndentationWhenExpressionIsInMultiLine(node, sourceFile, options) {
+                if (node.kind === 18) {
+                    return -1;
+                }
+                if (node.parent && (node.parent.kind === 174 ||
+                    node.parent.kind === 175) &&
+                    node.parent.expression !== node) {
+                    var fullCallOrNewExpression = node.parent.expression;
+                    var startingExpression = getStartingExpression(fullCallOrNewExpression);
+                    if (fullCallOrNewExpression === startingExpression) {
+                        return -1;
+                    }
+                    var fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
+                    var startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
+                    if (fullCallOrNewExpressionEnd.line === startingExpressionEnd.line) {
+                        return -1;
+                    }
+                    return findColumnForFirstNonWhitespaceCharacterInLine(fullCallOrNewExpressionEnd, sourceFile, options);
+                }
+                return -1;
+                function getStartingExpression(node) {
+                    while (true) {
+                        switch (node.kind) {
+                            case 174:
+                            case 175:
+                            case 172:
+                            case 173:
+                                node = node.expression;
+                                break;
+                            default:
+                                return node;
+                        }
+                    }
+                }
+            }
+            function deriveActualIndentationFromList(list, index, sourceFile, options) {
+                ts.Debug.assert(index >= 0 && index < list.length);
+                var node = list[index];
+                var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
+                for (var i = index - 1; i >= 0; i--) {
+                    if (list[i].kind === 24) {
+                        continue;
+                    }
+                    var prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
+                    if (prevEndLine !== lineAndCharacter.line) {
+                        return findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options);
+                    }
+                    lineAndCharacter = getStartLineAndCharacterForNode(list[i], sourceFile);
+                }
+                return -1;
+            }
+            function findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options) {
+                var lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
+                return findFirstNonWhitespaceColumn(lineStart, lineStart + lineAndCharacter.character, sourceFile, options);
+            }
+            function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
+                var character = 0;
+                var column = 0;
+                for (var pos = startPos; pos < endPos; pos++) {
+                    var ch = sourceFile.text.charCodeAt(pos);
+                    if (!ts.isWhiteSpace(ch)) {
+                        break;
+                    }
+                    if (ch === 9) {
+                        column += options.TabSize + (column % options.TabSize);
+                    }
+                    else {
+                        column++;
+                    }
+                    character++;
+                }
+                return { column: column, character: character };
+            }
+            SmartIndenter.findFirstNonWhitespaceCharacterAndColumn = findFirstNonWhitespaceCharacterAndColumn;
+            function findFirstNonWhitespaceColumn(startPos, endPos, sourceFile, options) {
+                return findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options).column;
+            }
+            SmartIndenter.findFirstNonWhitespaceColumn = findFirstNonWhitespaceColumn;
+            function nodeContentIsAlwaysIndented(kind) {
+                switch (kind) {
+                    case 202:
+                    case 221:
+                    case 192:
+                    case 222:
+                    case 224:
+                    case 223:
+                    case 170:
+                    case 199:
+                    case 226:
+                    case 171:
+                    case 159:
+                    case 161:
+                    case 227:
+                    case 250:
+                    case 249:
+                    case 178:
+                    case 172:
+                    case 174:
+                    case 175:
+                    case 200:
+                    case 218:
+                    case 235:
+                    case 211:
+                    case 188:
+                    case 168:
+                    case 167:
+                    case 243:
+                    case 242:
+                    case 248:
+                    case 146:
+                    case 151:
+                    case 152:
+                    case 142:
+                    case 156:
+                    case 157:
+                    case 164:
+                    case 176:
+                    case 184:
+                    case 233:
+                        return true;
+                }
+                return false;
+            }
+            function nodeWillIndentChild(parent, child, indentByDefault) {
+                var childKind = child ? child.kind : 0;
+                switch (parent.kind) {
+                    case 204:
+                    case 205:
+                    case 207:
+                    case 208:
+                    case 206:
+                    case 203:
+                    case 220:
+                    case 179:
+                    case 147:
+                    case 180:
+                    case 148:
+                    case 149:
+                    case 150:
+                        return childKind !== 199;
+                    case 241:
+                        return childKind !== 245;
+                }
+                return indentByDefault;
+            }
+            SmartIndenter.nodeWillIndentChild = nodeWillIndentChild;
+            function shouldIndentChildNode(parent, child) {
+                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, false);
+            }
+            SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
+        })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.servicesVersion = "0.5";
+    var ScriptSnapshot;
+    (function (ScriptSnapshot) {
+        var StringScriptSnapshot = (function () {
+            function StringScriptSnapshot(text) {
+                this.text = text;
+            }
+            StringScriptSnapshot.prototype.getText = function (start, end) {
+                return this.text.substring(start, end);
+            };
+            StringScriptSnapshot.prototype.getLength = function () {
+                return this.text.length;
+            };
+            StringScriptSnapshot.prototype.getChangeRange = function (oldSnapshot) {
+                return undefined;
+            };
+            return StringScriptSnapshot;
+        }());
+        function fromString(text) {
+            return new StringScriptSnapshot(text);
+        }
+        ScriptSnapshot.fromString = fromString;
+    })(ScriptSnapshot = ts.ScriptSnapshot || (ts.ScriptSnapshot = {}));
+    var scanner = ts.createScanner(2, true);
+    var emptyArray = [];
+    var jsDocTagNames = [
+        "augments",
+        "author",
+        "argument",
+        "borrows",
+        "class",
+        "constant",
+        "constructor",
+        "constructs",
+        "default",
+        "deprecated",
+        "description",
+        "event",
+        "example",
+        "extends",
+        "field",
+        "fileOverview",
+        "function",
+        "ignore",
+        "inner",
+        "lends",
+        "link",
+        "memberOf",
+        "name",
+        "namespace",
+        "param",
+        "private",
+        "property",
+        "public",
+        "requires",
+        "returns",
+        "see",
+        "since",
+        "static",
+        "throws",
+        "type",
+        "typedef",
+        "property",
+        "prop",
+        "version"
+    ];
+    var jsDocCompletionEntries;
+    function createNode(kind, pos, end, flags, parent) {
+        var node = new NodeObject(kind, pos, end);
+        node.flags = flags;
+        node.parent = parent;
+        return node;
+    }
+    var NodeObject = (function () {
+        function NodeObject(kind, pos, end) {
+            this.kind = kind;
+            this.pos = pos;
+            this.end = end;
+            this.flags = 0;
+            this.parent = undefined;
+        }
+        NodeObject.prototype.getSourceFile = function () {
+            return ts.getSourceFileOfNode(this);
+        };
+        NodeObject.prototype.getStart = function (sourceFile, includeJsDocComment) {
+            return ts.getTokenPosOfNode(this, sourceFile, includeJsDocComment);
+        };
+        NodeObject.prototype.getFullStart = function () {
+            return this.pos;
+        };
+        NodeObject.prototype.getEnd = function () {
+            return this.end;
+        };
+        NodeObject.prototype.getWidth = function (sourceFile) {
+            return this.getEnd() - this.getStart(sourceFile);
+        };
+        NodeObject.prototype.getFullWidth = function () {
+            return this.end - this.pos;
+        };
+        NodeObject.prototype.getLeadingTriviaWidth = function (sourceFile) {
+            return this.getStart(sourceFile) - this.pos;
+        };
+        NodeObject.prototype.getFullText = function (sourceFile) {
+            return (sourceFile || this.getSourceFile()).text.substring(this.pos, this.end);
+        };
+        NodeObject.prototype.getText = function (sourceFile) {
+            return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
+        };
+        NodeObject.prototype.addSyntheticNodes = function (nodes, pos, end, useJSDocScanner) {
+            scanner.setTextPos(pos);
+            while (pos < end) {
+                var token = useJSDocScanner ? scanner.scanJSDocToken() : scanner.scan();
+                var textPos = scanner.getTextPos();
+                if (textPos <= end) {
+                    nodes.push(createNode(token, pos, textPos, 0, this));
+                }
+                pos = textPos;
+            }
+            return pos;
+        };
+        NodeObject.prototype.createSyntaxList = function (nodes) {
+            var list = createNode(282, nodes.pos, nodes.end, 0, this);
+            list._children = [];
+            var pos = nodes.pos;
+            for (var _i = 0, nodes_7 = nodes; _i < nodes_7.length; _i++) {
+                var node = nodes_7[_i];
+                if (pos < node.pos) {
+                    pos = this.addSyntheticNodes(list._children, pos, node.pos);
+                }
+                list._children.push(node);
+                pos = node.end;
+            }
+            if (pos < nodes.end) {
+                this.addSyntheticNodes(list._children, pos, nodes.end);
+            }
+            return list;
+        };
+        NodeObject.prototype.createChildren = function (sourceFile) {
+            var _this = this;
+            var children;
+            if (this.kind >= 139) {
+                scanner.setText((sourceFile || this.getSourceFile()).text);
+                children = [];
+                var pos_3 = this.pos;
+                var useJSDocScanner_1 = this.kind >= 273 && this.kind <= 281;
+                var processNode = function (node) {
+                    if (pos_3 < node.pos) {
+                        pos_3 = _this.addSyntheticNodes(children, pos_3, node.pos, useJSDocScanner_1);
+                    }
+                    children.push(node);
+                    pos_3 = node.end;
+                };
+                var processNodes = function (nodes) {
+                    if (pos_3 < nodes.pos) {
+                        pos_3 = _this.addSyntheticNodes(children, pos_3, nodes.pos, useJSDocScanner_1);
+                    }
+                    children.push(_this.createSyntaxList(nodes));
+                    pos_3 = nodes.end;
+                };
+                if (this.jsDocComments) {
+                    for (var _i = 0, _a = this.jsDocComments; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        processNode(jsDocComment);
+                    }
+                }
+                ts.forEachChild(this, processNode, processNodes);
+                if (pos_3 < this.end) {
+                    this.addSyntheticNodes(children, pos_3, this.end);
+                }
+                scanner.setText(undefined);
+            }
+            this._children = children || emptyArray;
+        };
+        NodeObject.prototype.getChildCount = function (sourceFile) {
+            if (!this._children)
+                this.createChildren(sourceFile);
+            return this._children.length;
+        };
+        NodeObject.prototype.getChildAt = function (index, sourceFile) {
+            if (!this._children)
+                this.createChildren(sourceFile);
+            return this._children[index];
+        };
+        NodeObject.prototype.getChildren = function (sourceFile) {
+            if (!this._children)
+                this.createChildren(sourceFile);
+            return this._children;
+        };
+        NodeObject.prototype.getFirstToken = function (sourceFile) {
+            var children = this.getChildren(sourceFile);
+            if (!children.length) {
+                return undefined;
+            }
+            var child = children[0];
+            return child.kind < 139 ? child : child.getFirstToken(sourceFile);
+        };
+        NodeObject.prototype.getLastToken = function (sourceFile) {
+            var children = this.getChildren(sourceFile);
+            var child = ts.lastOrUndefined(children);
+            if (!child) {
+                return undefined;
+            }
+            return child.kind < 139 ? child : child.getLastToken(sourceFile);
+        };
+        return NodeObject;
+    }());
+    var SymbolObject = (function () {
+        function SymbolObject(flags, name) {
+            this.flags = flags;
+            this.name = name;
+        }
+        SymbolObject.prototype.getFlags = function () {
+            return this.flags;
+        };
+        SymbolObject.prototype.getName = function () {
+            return this.name;
+        };
+        SymbolObject.prototype.getDeclarations = function () {
+            return this.declarations;
+        };
+        SymbolObject.prototype.getDocumentationComment = function () {
+            if (this.documentationComment === undefined) {
+                this.documentationComment = getJsDocCommentsFromDeclarations(this.declarations, this.name, !(this.flags & 4));
+            }
+            return this.documentationComment;
+        };
+        return SymbolObject;
+    }());
+    function getJsDocCommentsFromDeclarations(declarations, name, canUseParsedParamTagComments) {
+        var documentationComment = [];
+        var docComments = getJsDocCommentsSeparatedByNewLines();
+        ts.forEach(docComments, function (docComment) {
+            if (documentationComment.length) {
+                documentationComment.push(ts.lineBreakPart());
+            }
+            documentationComment.push(docComment);
+        });
+        return documentationComment;
+        function getJsDocCommentsSeparatedByNewLines() {
+            var paramTag = "@param";
+            var jsDocCommentParts = [];
+            ts.forEach(declarations, function (declaration, indexOfDeclaration) {
+                if (ts.indexOf(declarations, declaration) === indexOfDeclaration) {
+                    var sourceFileOfDeclaration = ts.getSourceFileOfNode(declaration);
+                    if (canUseParsedParamTagComments && declaration.kind === 142) {
+                        if ((declaration.parent.kind === 179 || declaration.parent.kind === 180) &&
+                            declaration.parent.parent.kind === 218) {
+                            addCommentParts(declaration.parent.parent.parent, sourceFileOfDeclaration, getCleanedParamJsDocComment);
+                        }
+                        addCommentParts(declaration.parent, sourceFileOfDeclaration, getCleanedParamJsDocComment);
+                    }
+                    if (declaration.kind === 225 && declaration.body.kind === 225) {
+                        return;
+                    }
+                    if ((declaration.kind === 179 || declaration.kind === 180) &&
+                        declaration.parent.kind === 218) {
+                        addCommentParts(declaration.parent.parent, sourceFileOfDeclaration, getCleanedJsDocComment);
+                    }
+                    while (declaration.kind === 225 && declaration.parent.kind === 225) {
+                        declaration = declaration.parent;
+                    }
+                    addCommentParts(declaration.kind === 218 ? declaration.parent.parent : declaration, sourceFileOfDeclaration, getCleanedJsDocComment);
+                    if (declaration.kind === 218) {
+                        var init = declaration.initializer;
+                        if (init && (init.kind === 179 || init.kind === 180)) {
+                            addCommentParts(init, sourceFileOfDeclaration, getCleanedJsDocComment);
+                        }
+                    }
+                }
+            });
+            return jsDocCommentParts;
+            function addCommentParts(commented, sourceFileOfDeclaration, getCommentPart) {
+                var ranges = getJsDocCommentTextRange(commented, sourceFileOfDeclaration);
+                ts.forEach(ranges, function (jsDocCommentTextRange) {
+                    var cleanedComment = getCommentPart(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration);
+                    if (cleanedComment) {
+                        ts.addRange(jsDocCommentParts, cleanedComment);
+                    }
+                });
+            }
+            function getJsDocCommentTextRange(node, sourceFile) {
+                return ts.map(ts.getJsDocComments(node, sourceFile), function (jsDocComment) {
+                    return {
+                        pos: jsDocComment.pos + "/*".length,
+                        end: jsDocComment.end - "*/".length
+                    };
+                });
+            }
+            function consumeWhiteSpacesOnTheLine(pos, end, sourceFile, maxSpacesToRemove) {
+                if (maxSpacesToRemove !== undefined) {
+                    end = Math.min(end, pos + maxSpacesToRemove);
+                }
+                for (; pos < end; pos++) {
+                    var ch = sourceFile.text.charCodeAt(pos);
+                    if (!ts.isWhiteSpace(ch) || ts.isLineBreak(ch)) {
+                        return pos;
+                    }
+                }
+                return end;
+            }
+            function consumeLineBreaks(pos, end, sourceFile) {
+                while (pos < end && ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
+                    pos++;
+                }
+                return pos;
+            }
+            function isName(pos, end, sourceFile, name) {
+                return pos + name.length < end &&
+                    sourceFile.text.substr(pos, name.length) === name &&
+                    (ts.isWhiteSpace(sourceFile.text.charCodeAt(pos + name.length)) ||
+                        ts.isLineBreak(sourceFile.text.charCodeAt(pos + name.length)));
+            }
+            function isParamTag(pos, end, sourceFile) {
+                return isName(pos, end, sourceFile, paramTag);
+            }
+            function pushDocCommentLineText(docComments, text, blankLineCount) {
+                while (blankLineCount) {
+                    blankLineCount--;
+                    docComments.push(ts.textPart(""));
+                }
+                docComments.push(ts.textPart(text));
+            }
+            function getCleanedJsDocComment(pos, end, sourceFile) {
+                var spacesToRemoveAfterAsterisk;
+                var docComments = [];
+                var blankLineCount = 0;
+                var isInParamTag = false;
+                while (pos < end) {
+                    var docCommentTextOfLine = "";
+                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile);
+                    if (pos < end && sourceFile.text.charCodeAt(pos) === 42) {
+                        var lineStartPos = pos + 1;
+                        pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, spacesToRemoveAfterAsterisk);
+                        if (spacesToRemoveAfterAsterisk === undefined && pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
+                            spacesToRemoveAfterAsterisk = pos - lineStartPos;
+                        }
+                    }
+                    else if (spacesToRemoveAfterAsterisk === undefined) {
+                        spacesToRemoveAfterAsterisk = 0;
+                    }
+                    while (pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
+                        var ch = sourceFile.text.charAt(pos);
+                        if (ch === "@") {
+                            if (isParamTag(pos, end, sourceFile)) {
+                                isInParamTag = true;
+                                pos += paramTag.length;
+                                continue;
+                            }
+                            else {
+                                isInParamTag = false;
+                            }
+                        }
+                        if (!isInParamTag) {
+                            docCommentTextOfLine += ch;
+                        }
+                        pos++;
+                    }
+                    pos = consumeLineBreaks(pos, end, sourceFile);
+                    if (docCommentTextOfLine) {
+                        pushDocCommentLineText(docComments, docCommentTextOfLine, blankLineCount);
+                        blankLineCount = 0;
+                    }
+                    else if (!isInParamTag && docComments.length) {
+                        blankLineCount++;
+                    }
+                }
+                return docComments;
+            }
+            function getCleanedParamJsDocComment(pos, end, sourceFile) {
+                var paramHelpStringMargin;
+                var paramDocComments = [];
+                while (pos < end) {
+                    if (isParamTag(pos, end, sourceFile)) {
+                        var blankLineCount = 0;
+                        var recordedParamTag = false;
+                        pos = consumeWhiteSpaces(pos + paramTag.length);
+                        if (pos >= end) {
+                            break;
+                        }
+                        if (sourceFile.text.charCodeAt(pos) === 123) {
+                            pos++;
+                            for (var curlies = 1; pos < end; pos++) {
+                                var charCode = sourceFile.text.charCodeAt(pos);
+                                if (charCode === 123) {
+                                    curlies++;
+                                    continue;
+                                }
+                                if (charCode === 125) {
+                                    curlies--;
+                                    if (curlies === 0) {
+                                        pos++;
+                                        break;
+                                    }
+                                    else {
+                                        continue;
+                                    }
+                                }
+                                if (charCode === 64) {
+                                    break;
+                                }
+                            }
+                            pos = consumeWhiteSpaces(pos);
+                            if (pos >= end) {
+                                break;
+                            }
+                        }
+                        if (isName(pos, end, sourceFile, name)) {
+                            pos = consumeWhiteSpaces(pos + name.length);
+                            if (pos >= end) {
+                                break;
+                            }
+                            var paramHelpString = "";
+                            var firstLineParamHelpStringPos = pos;
+                            while (pos < end) {
+                                var ch = sourceFile.text.charCodeAt(pos);
+                                if (ts.isLineBreak(ch)) {
+                                    if (paramHelpString) {
+                                        pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
+                                        paramHelpString = "";
+                                        blankLineCount = 0;
+                                        recordedParamTag = true;
+                                    }
+                                    else if (recordedParamTag) {
+                                        blankLineCount++;
+                                    }
+                                    setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos);
+                                    continue;
+                                }
+                                if (ch === 64) {
+                                    break;
+                                }
+                                paramHelpString += sourceFile.text.charAt(pos);
+                                pos++;
+                            }
+                            if (paramHelpString) {
+                                pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
+                            }
+                            paramHelpStringMargin = undefined;
+                        }
+                        if (sourceFile.text.charCodeAt(pos) === 64) {
+                            continue;
+                        }
+                    }
+                    pos++;
+                }
+                return paramDocComments;
+                function consumeWhiteSpaces(pos) {
+                    while (pos < end && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
+                        pos++;
+                    }
+                    return pos;
+                }
+                function setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos) {
+                    pos = consumeLineBreaks(pos, end, sourceFile);
+                    if (pos >= end) {
+                        return;
+                    }
+                    if (paramHelpStringMargin === undefined) {
+                        paramHelpStringMargin = sourceFile.getLineAndCharacterOfPosition(firstLineParamHelpStringPos).character;
+                    }
+                    var startOfLinePos = pos;
+                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile, paramHelpStringMargin);
+                    if (pos >= end) {
+                        return;
+                    }
+                    var consumedSpaces = pos - startOfLinePos;
+                    if (consumedSpaces < paramHelpStringMargin) {
+                        var ch = sourceFile.text.charCodeAt(pos);
+                        if (ch === 42) {
+                            pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, paramHelpStringMargin - consumedSpaces - 1);
+                        }
+                    }
+                }
+            }
+        }
+    }
+    var TypeObject = (function () {
+        function TypeObject(checker, flags) {
+            this.checker = checker;
+            this.flags = flags;
+        }
+        TypeObject.prototype.getFlags = function () {
+            return this.flags;
+        };
+        TypeObject.prototype.getSymbol = function () {
+            return this.symbol;
+        };
+        TypeObject.prototype.getProperties = function () {
+            return this.checker.getPropertiesOfType(this);
+        };
+        TypeObject.prototype.getProperty = function (propertyName) {
+            return this.checker.getPropertyOfType(this, propertyName);
+        };
+        TypeObject.prototype.getApparentProperties = function () {
+            return this.checker.getAugmentedPropertiesOfType(this);
+        };
+        TypeObject.prototype.getCallSignatures = function () {
+            return this.checker.getSignaturesOfType(this, 0);
+        };
+        TypeObject.prototype.getConstructSignatures = function () {
+            return this.checker.getSignaturesOfType(this, 1);
+        };
+        TypeObject.prototype.getStringIndexType = function () {
+            return this.checker.getIndexTypeOfType(this, 0);
+        };
+        TypeObject.prototype.getNumberIndexType = function () {
+            return this.checker.getIndexTypeOfType(this, 1);
+        };
+        TypeObject.prototype.getBaseTypes = function () {
+            return this.flags & (1024 | 2048)
+                ? this.checker.getBaseTypes(this)
+                : undefined;
+        };
+        TypeObject.prototype.getNonNullableType = function () {
+            return this.checker.getNonNullableType(this);
+        };
+        return TypeObject;
+    }());
+    var SignatureObject = (function () {
+        function SignatureObject(checker) {
+            this.checker = checker;
+        }
+        SignatureObject.prototype.getDeclaration = function () {
+            return this.declaration;
+        };
+        SignatureObject.prototype.getTypeParameters = function () {
+            return this.typeParameters;
+        };
+        SignatureObject.prototype.getParameters = function () {
+            return this.parameters;
+        };
+        SignatureObject.prototype.getReturnType = function () {
+            return this.checker.getReturnTypeOfSignature(this);
+        };
+        SignatureObject.prototype.getDocumentationComment = function () {
+            if (this.documentationComment === undefined) {
+                this.documentationComment = this.declaration ? getJsDocCommentsFromDeclarations([this.declaration], undefined, false) : [];
+            }
+            return this.documentationComment;
+        };
+        return SignatureObject;
+    }());
+    var SourceFileObject = (function (_super) {
+        __extends(SourceFileObject, _super);
+        function SourceFileObject(kind, pos, end) {
+            _super.call(this, kind, pos, end);
+        }
+        SourceFileObject.prototype.update = function (newText, textChangeRange) {
+            return ts.updateSourceFile(this, newText, textChangeRange);
+        };
+        SourceFileObject.prototype.getLineAndCharacterOfPosition = function (position) {
+            return ts.getLineAndCharacterOfPosition(this, position);
+        };
+        SourceFileObject.prototype.getLineStarts = function () {
+            return ts.getLineStarts(this);
+        };
+        SourceFileObject.prototype.getPositionOfLineAndCharacter = function (line, character) {
+            return ts.getPositionOfLineAndCharacter(this, line, character);
+        };
+        SourceFileObject.prototype.getNamedDeclarations = function () {
+            if (!this.namedDeclarations) {
+                this.namedDeclarations = this.computeNamedDeclarations();
+            }
+            return this.namedDeclarations;
+        };
+        SourceFileObject.prototype.computeNamedDeclarations = function () {
+            var result = {};
+            ts.forEachChild(this, visit);
+            return result;
+            function addDeclaration(declaration) {
+                var name = getDeclarationName(declaration);
+                if (name) {
+                    var declarations = getDeclarations(name);
+                    declarations.push(declaration);
+                }
+            }
+            function getDeclarations(name) {
+                return ts.getProperty(result, name) || (result[name] = []);
+            }
+            function getDeclarationName(declaration) {
+                if (declaration.name) {
+                    var result_2 = getTextOfIdentifierOrLiteral(declaration.name);
+                    if (result_2 !== undefined) {
+                        return result_2;
+                    }
+                    if (declaration.name.kind === 140) {
+                        var expr = declaration.name.expression;
+                        if (expr.kind === 172) {
+                            return expr.name.text;
+                        }
+                        return getTextOfIdentifierOrLiteral(expr);
+                    }
+                }
+                return undefined;
+            }
+            function getTextOfIdentifierOrLiteral(node) {
+                if (node) {
+                    if (node.kind === 69 ||
+                        node.kind === 9 ||
+                        node.kind === 8) {
+                        return node.text;
+                    }
+                }
+                return undefined;
+            }
+            function visit(node) {
+                switch (node.kind) {
+                    case 220:
+                    case 179:
+                    case 147:
+                    case 146:
+                        var functionDeclaration = node;
+                        var declarationName = getDeclarationName(functionDeclaration);
+                        if (declarationName) {
+                            var declarations = getDeclarations(declarationName);
+                            var lastDeclaration = ts.lastOrUndefined(declarations);
+                            if (lastDeclaration && functionDeclaration.parent === lastDeclaration.parent && functionDeclaration.symbol === lastDeclaration.symbol) {
+                                if (functionDeclaration.body && !lastDeclaration.body) {
+                                    declarations[declarations.length - 1] = functionDeclaration;
+                                }
+                            }
+                            else {
+                                declarations.push(functionDeclaration);
+                            }
+                            ts.forEachChild(node, visit);
+                        }
+                        break;
+                    case 221:
+                    case 192:
+                    case 222:
+                    case 223:
+                    case 224:
+                    case 225:
+                    case 229:
+                    case 238:
+                    case 234:
+                    case 229:
+                    case 231:
+                    case 232:
+                    case 149:
+                    case 150:
+                    case 159:
+                        addDeclaration(node);
+                        ts.forEachChild(node, visit);
+                        break;
+                    case 142:
+                        if (!(node.flags & 92)) {
+                            break;
+                        }
+                    case 218:
+                    case 169: {
+                        var decl = node;
+                        if (ts.isBindingPattern(decl.name)) {
+                            ts.forEachChild(decl.name, visit);
+                            break;
+                        }
+                        if (decl.initializer)
+                            visit(decl.initializer);
+                    }
+                    case 255:
+                    case 145:
+                    case 144:
+                        addDeclaration(node);
+                        break;
+                    case 236:
+                        if (node.exportClause) {
+                            ts.forEach(node.exportClause.elements, visit);
+                        }
+                        break;
+                    case 230:
+                        var importClause = node.importClause;
+                        if (importClause) {
+                            if (importClause.name) {
+                                addDeclaration(importClause);
+                            }
+                            if (importClause.namedBindings) {
+                                if (importClause.namedBindings.kind === 232) {
+                                    addDeclaration(importClause.namedBindings);
+                                }
+                                else {
+                                    ts.forEach(importClause.namedBindings.elements, visit);
+                                }
+                            }
+                        }
+                        break;
+                    default:
+                        ts.forEachChild(node, visit);
+                }
+            }
+        };
+        return SourceFileObject;
+    }(NodeObject));
+    var TextChange = (function () {
+        function TextChange() {
+        }
+        return TextChange;
+    }());
+    ts.TextChange = TextChange;
+    var HighlightSpanKind;
+    (function (HighlightSpanKind) {
+        HighlightSpanKind.none = "none";
+        HighlightSpanKind.definition = "definition";
+        HighlightSpanKind.reference = "reference";
+        HighlightSpanKind.writtenReference = "writtenReference";
+    })(HighlightSpanKind = ts.HighlightSpanKind || (ts.HighlightSpanKind = {}));
+    (function (IndentStyle) {
+        IndentStyle[IndentStyle["None"] = 0] = "None";
+        IndentStyle[IndentStyle["Block"] = 1] = "Block";
+        IndentStyle[IndentStyle["Smart"] = 2] = "Smart";
+    })(ts.IndentStyle || (ts.IndentStyle = {}));
+    var IndentStyle = ts.IndentStyle;
+    (function (SymbolDisplayPartKind) {
+        SymbolDisplayPartKind[SymbolDisplayPartKind["aliasName"] = 0] = "aliasName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["className"] = 1] = "className";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["enumName"] = 2] = "enumName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["fieldName"] = 3] = "fieldName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["interfaceName"] = 4] = "interfaceName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["keyword"] = 5] = "keyword";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["lineBreak"] = 6] = "lineBreak";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["numericLiteral"] = 7] = "numericLiteral";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["stringLiteral"] = 8] = "stringLiteral";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["localName"] = 9] = "localName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["methodName"] = 10] = "methodName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["moduleName"] = 11] = "moduleName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["operator"] = 12] = "operator";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["parameterName"] = 13] = "parameterName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["propertyName"] = 14] = "propertyName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["punctuation"] = 15] = "punctuation";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["space"] = 16] = "space";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["text"] = 17] = "text";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["typeParameterName"] = 18] = "typeParameterName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["enumMemberName"] = 19] = "enumMemberName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["functionName"] = 20] = "functionName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["regularExpressionLiteral"] = 21] = "regularExpressionLiteral";
+    })(ts.SymbolDisplayPartKind || (ts.SymbolDisplayPartKind = {}));
+    var SymbolDisplayPartKind = ts.SymbolDisplayPartKind;
+    (function (TokenClass) {
+        TokenClass[TokenClass["Punctuation"] = 0] = "Punctuation";
+        TokenClass[TokenClass["Keyword"] = 1] = "Keyword";
+        TokenClass[TokenClass["Operator"] = 2] = "Operator";
+        TokenClass[TokenClass["Comment"] = 3] = "Comment";
+        TokenClass[TokenClass["Whitespace"] = 4] = "Whitespace";
+        TokenClass[TokenClass["Identifier"] = 5] = "Identifier";
+        TokenClass[TokenClass["NumberLiteral"] = 6] = "NumberLiteral";
+        TokenClass[TokenClass["StringLiteral"] = 7] = "StringLiteral";
+        TokenClass[TokenClass["RegExpLiteral"] = 8] = "RegExpLiteral";
+    })(ts.TokenClass || (ts.TokenClass = {}));
+    var TokenClass = ts.TokenClass;
+    var ScriptElementKind;
+    (function (ScriptElementKind) {
+        ScriptElementKind.unknown = "";
+        ScriptElementKind.warning = "warning";
+        ScriptElementKind.keyword = "keyword";
+        ScriptElementKind.scriptElement = "script";
+        ScriptElementKind.moduleElement = "module";
+        ScriptElementKind.classElement = "class";
+        ScriptElementKind.localClassElement = "local class";
+        ScriptElementKind.interfaceElement = "interface";
+        ScriptElementKind.typeElement = "type";
+        ScriptElementKind.enumElement = "enum";
+        ScriptElementKind.variableElement = "var";
+        ScriptElementKind.localVariableElement = "local var";
+        ScriptElementKind.functionElement = "function";
+        ScriptElementKind.localFunctionElement = "local function";
+        ScriptElementKind.memberFunctionElement = "method";
+        ScriptElementKind.memberGetAccessorElement = "getter";
+        ScriptElementKind.memberSetAccessorElement = "setter";
+        ScriptElementKind.memberVariableElement = "property";
+        ScriptElementKind.constructorImplementationElement = "constructor";
+        ScriptElementKind.callSignatureElement = "call";
+        ScriptElementKind.indexSignatureElement = "index";
+        ScriptElementKind.constructSignatureElement = "construct";
+        ScriptElementKind.parameterElement = "parameter";
+        ScriptElementKind.typeParameterElement = "type parameter";
+        ScriptElementKind.primitiveType = "primitive type";
+        ScriptElementKind.label = "label";
+        ScriptElementKind.alias = "alias";
+        ScriptElementKind.constElement = "const";
+        ScriptElementKind.letElement = "let";
+    })(ScriptElementKind = ts.ScriptElementKind || (ts.ScriptElementKind = {}));
+    var ScriptElementKindModifier;
+    (function (ScriptElementKindModifier) {
+        ScriptElementKindModifier.none = "";
+        ScriptElementKindModifier.publicMemberModifier = "public";
+        ScriptElementKindModifier.privateMemberModifier = "private";
+        ScriptElementKindModifier.protectedMemberModifier = "protected";
+        ScriptElementKindModifier.exportedModifier = "export";
+        ScriptElementKindModifier.ambientModifier = "declare";
+        ScriptElementKindModifier.staticModifier = "static";
+        ScriptElementKindModifier.abstractModifier = "abstract";
+    })(ScriptElementKindModifier = ts.ScriptElementKindModifier || (ts.ScriptElementKindModifier = {}));
+    var ClassificationTypeNames = (function () {
+        function ClassificationTypeNames() {
+        }
+        ClassificationTypeNames.comment = "comment";
+        ClassificationTypeNames.identifier = "identifier";
+        ClassificationTypeNames.keyword = "keyword";
+        ClassificationTypeNames.numericLiteral = "number";
+        ClassificationTypeNames.operator = "operator";
+        ClassificationTypeNames.stringLiteral = "string";
+        ClassificationTypeNames.whiteSpace = "whitespace";
+        ClassificationTypeNames.text = "text";
+        ClassificationTypeNames.punctuation = "punctuation";
+        ClassificationTypeNames.className = "class name";
+        ClassificationTypeNames.enumName = "enum name";
+        ClassificationTypeNames.interfaceName = "interface name";
+        ClassificationTypeNames.moduleName = "module name";
+        ClassificationTypeNames.typeParameterName = "type parameter name";
+        ClassificationTypeNames.typeAliasName = "type alias name";
+        ClassificationTypeNames.parameterName = "parameter name";
+        ClassificationTypeNames.docCommentTagName = "doc comment tag name";
+        ClassificationTypeNames.jsxOpenTagName = "jsx open tag name";
+        ClassificationTypeNames.jsxCloseTagName = "jsx close tag name";
+        ClassificationTypeNames.jsxSelfClosingTagName = "jsx self closing tag name";
+        ClassificationTypeNames.jsxAttribute = "jsx attribute";
+        ClassificationTypeNames.jsxText = "jsx text";
+        ClassificationTypeNames.jsxAttributeStringLiteralValue = "jsx attribute string literal value";
+        return ClassificationTypeNames;
+    }());
+    ts.ClassificationTypeNames = ClassificationTypeNames;
+    function displayPartsToString(displayParts) {
+        if (displayParts) {
+            return ts.map(displayParts, function (displayPart) { return displayPart.text; }).join("");
+        }
+        return "";
+    }
+    ts.displayPartsToString = displayPartsToString;
+    function isLocalVariableOrFunction(symbol) {
+        if (symbol.parent) {
+            return false;
+        }
+        return ts.forEach(symbol.declarations, function (declaration) {
+            if (declaration.kind === 179) {
+                return true;
+            }
+            if (declaration.kind !== 218 && declaration.kind !== 220) {
+                return false;
+            }
+            for (var parent_15 = declaration.parent; !ts.isFunctionBlock(parent_15); parent_15 = parent_15.parent) {
+                if (parent_15.kind === 256 || parent_15.kind === 226) {
+                    return false;
+                }
+            }
+            return true;
+        });
+    }
+    function getDefaultCompilerOptions() {
+        return {
+            target: 1,
+            jsx: 1
+        };
+    }
+    ts.getDefaultCompilerOptions = getDefaultCompilerOptions;
+    var HostCache = (function () {
+        function HostCache(host, getCanonicalFileName) {
+            this.host = host;
+            this.getCanonicalFileName = getCanonicalFileName;
+            this.currentDirectory = host.getCurrentDirectory();
+            this.fileNameToEntry = ts.createFileMap();
+            var rootFileNames = host.getScriptFileNames();
+            for (var _i = 0, rootFileNames_1 = rootFileNames; _i < rootFileNames_1.length; _i++) {
+                var fileName = rootFileNames_1[_i];
+                this.createEntry(fileName, ts.toPath(fileName, this.currentDirectory, getCanonicalFileName));
+            }
+            this._compilationSettings = host.getCompilationSettings() || getDefaultCompilerOptions();
+        }
+        HostCache.prototype.compilationSettings = function () {
+            return this._compilationSettings;
+        };
+        HostCache.prototype.createEntry = function (fileName, path) {
+            var entry;
+            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
+            if (scriptSnapshot) {
+                entry = {
+                    hostFileName: fileName,
+                    version: this.host.getScriptVersion(fileName),
+                    scriptSnapshot: scriptSnapshot,
+                    scriptKind: ts.getScriptKind(fileName, this.host)
+                };
+            }
+            this.fileNameToEntry.set(path, entry);
+            return entry;
+        };
+        HostCache.prototype.getEntry = function (path) {
+            return this.fileNameToEntry.get(path);
+        };
+        HostCache.prototype.contains = function (path) {
+            return this.fileNameToEntry.contains(path);
+        };
+        HostCache.prototype.getOrCreateEntry = function (fileName) {
+            var path = ts.toPath(fileName, this.currentDirectory, this.getCanonicalFileName);
+            return this.getOrCreateEntryByPath(fileName, path);
+        };
+        HostCache.prototype.getOrCreateEntryByPath = function (fileName, path) {
+            return this.contains(path)
+                ? this.getEntry(path)
+                : this.createEntry(fileName, path);
+        };
+        HostCache.prototype.getRootFileNames = function () {
+            var fileNames = [];
+            this.fileNameToEntry.forEachValue(function (path, value) {
+                if (value) {
+                    fileNames.push(value.hostFileName);
+                }
+            });
+            return fileNames;
+        };
+        HostCache.prototype.getVersion = function (path) {
+            var file = this.getEntry(path);
+            return file && file.version;
+        };
+        HostCache.prototype.getScriptSnapshot = function (path) {
+            var file = this.getEntry(path);
+            return file && file.scriptSnapshot;
+        };
+        return HostCache;
+    }());
+    var SyntaxTreeCache = (function () {
+        function SyntaxTreeCache(host) {
+            this.host = host;
+        }
+        SyntaxTreeCache.prototype.getCurrentSourceFile = function (fileName) {
+            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
+            if (!scriptSnapshot) {
+                throw new Error("Could not find file: '" + fileName + "'.");
+            }
+            var scriptKind = ts.getScriptKind(fileName, this.host);
+            var version = this.host.getScriptVersion(fileName);
+            var sourceFile;
+            if (this.currentFileName !== fileName) {
+                sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, 2, version, true, scriptKind);
+            }
+            else if (this.currentFileVersion !== version) {
+                var editRange = scriptSnapshot.getChangeRange(this.currentFileScriptSnapshot);
+                sourceFile = updateLanguageServiceSourceFile(this.currentSourceFile, scriptSnapshot, version, editRange);
+            }
+            if (sourceFile) {
+                this.currentFileVersion = version;
+                this.currentFileName = fileName;
+                this.currentFileScriptSnapshot = scriptSnapshot;
+                this.currentSourceFile = sourceFile;
+            }
+            return this.currentSourceFile;
+        };
+        return SyntaxTreeCache;
+    }());
+    function setSourceFileFields(sourceFile, scriptSnapshot, version) {
+        sourceFile.version = version;
+        sourceFile.scriptSnapshot = scriptSnapshot;
+    }
+    var commandLineOptions_stringToEnum;
+    function fixupCompilerOptions(options, diagnostics) {
+        commandLineOptions_stringToEnum = commandLineOptions_stringToEnum || ts.filter(ts.optionDeclarations, function (o) {
+            return typeof o.type === "object" && !ts.forEachValue(o.type, function (v) { return typeof v !== "number"; });
+        });
+        options = ts.clone(options);
+        var _loop_2 = function(opt) {
+            if (!ts.hasProperty(options, opt.name)) {
+                return "continue";
+            }
+            var value = options[opt.name];
+            if (typeof value === "string") {
+                options[opt.name] = ts.parseCustomTypeOption(opt, value, diagnostics);
+            }
+            else {
+                if (!ts.forEachValue(opt.type, function (v) { return v === value; })) {
+                    diagnostics.push(ts.createCompilerDiagnosticForInvalidCustomType(opt));
+                }
+            }
+        };
+        for (var _i = 0, commandLineOptions_stringToEnum_1 = commandLineOptions_stringToEnum; _i < commandLineOptions_stringToEnum_1.length; _i++) {
+            var opt = commandLineOptions_stringToEnum_1[_i];
+            _loop_2(opt);
+        }
+        return options;
+    }
+    function transpileModule(input, transpileOptions) {
+        var diagnostics = [];
+        var options = transpileOptions.compilerOptions ? fixupCompilerOptions(transpileOptions.compilerOptions, diagnostics) : getDefaultCompilerOptions();
+        options.isolatedModules = true;
+        options.suppressOutputPathCheck = true;
+        options.allowNonTsExtensions = true;
+        options.noLib = true;
+        options.noResolve = true;
+        var inputFileName = transpileOptions.fileName || (options.jsx ? "module.tsx" : "module.ts");
+        var sourceFile = ts.createSourceFile(inputFileName, input, options.target);
+        if (transpileOptions.moduleName) {
+            sourceFile.moduleName = transpileOptions.moduleName;
+        }
+        sourceFile.renamedDependencies = transpileOptions.renamedDependencies;
+        var newLine = ts.getNewLineCharacter(options);
+        var outputText;
+        var sourceMapText;
+        var compilerHost = {
+            getSourceFile: function (fileName, target) { return fileName === ts.normalizePath(inputFileName) ? sourceFile : undefined; },
+            writeFile: function (name, text, writeByteOrderMark) {
+                if (ts.fileExtensionIs(name, ".map")) {
+                    ts.Debug.assert(sourceMapText === undefined, "Unexpected multiple source map outputs for the file '" + name + "'");
+                    sourceMapText = text;
+                }
+                else {
+                    ts.Debug.assert(outputText === undefined, "Unexpected multiple outputs for the file: '" + name + "'");
+                    outputText = text;
+                }
+            },
+            getDefaultLibFileName: function () { return "lib.d.ts"; },
+            useCaseSensitiveFileNames: function () { return false; },
+            getCanonicalFileName: function (fileName) { return fileName; },
+            getCurrentDirectory: function () { return ""; },
+            getNewLine: function () { return newLine; },
+            fileExists: function (fileName) { return fileName === inputFileName; },
+            readFile: function (fileName) { return ""; },
+            directoryExists: function (directoryExists) { return true; }
+        };
+        var program = ts.createProgram([inputFileName], options, compilerHost);
+        if (transpileOptions.reportDiagnostics) {
+            ts.addRange(diagnostics, program.getSyntacticDiagnostics(sourceFile));
+            ts.addRange(diagnostics, program.getOptionsDiagnostics());
+        }
+        program.emit();
+        ts.Debug.assert(outputText !== undefined, "Output generation failed");
+        return { outputText: outputText, diagnostics: diagnostics, sourceMapText: sourceMapText };
+    }
+    ts.transpileModule = transpileModule;
+    function transpile(input, compilerOptions, fileName, diagnostics, moduleName) {
+        var output = transpileModule(input, { compilerOptions: compilerOptions, fileName: fileName, reportDiagnostics: !!diagnostics, moduleName: moduleName });
+        ts.addRange(diagnostics, output.diagnostics);
+        return output.outputText;
+    }
+    ts.transpile = transpile;
+    function createLanguageServiceSourceFile(fileName, scriptSnapshot, scriptTarget, version, setNodeParents, scriptKind) {
+        var text = scriptSnapshot.getText(0, scriptSnapshot.getLength());
+        var sourceFile = ts.createSourceFile(fileName, text, scriptTarget, setNodeParents, scriptKind);
+        setSourceFileFields(sourceFile, scriptSnapshot, version);
+        return sourceFile;
+    }
+    ts.createLanguageServiceSourceFile = createLanguageServiceSourceFile;
+    ts.disableIncrementalParsing = false;
+    function updateLanguageServiceSourceFile(sourceFile, scriptSnapshot, version, textChangeRange, aggressiveChecks) {
+        if (textChangeRange) {
+            if (version !== sourceFile.version) {
+                if (!ts.disableIncrementalParsing) {
+                    var newText = void 0;
+                    var prefix = textChangeRange.span.start !== 0
+                        ? sourceFile.text.substr(0, textChangeRange.span.start)
+                        : "";
+                    var suffix = ts.textSpanEnd(textChangeRange.span) !== sourceFile.text.length
+                        ? sourceFile.text.substr(ts.textSpanEnd(textChangeRange.span))
+                        : "";
+                    if (textChangeRange.newLength === 0) {
+                        newText = prefix && suffix ? prefix + suffix : prefix || suffix;
+                    }
+                    else {
+                        var changedText = scriptSnapshot.getText(textChangeRange.span.start, textChangeRange.span.start + textChangeRange.newLength);
+                        newText = prefix && suffix
+                            ? prefix + changedText + suffix
+                            : prefix
+                                ? (prefix + changedText)
+                                : (changedText + suffix);
+                    }
+                    var newSourceFile = ts.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
+                    setSourceFileFields(newSourceFile, scriptSnapshot, version);
+                    newSourceFile.nameTable = undefined;
+                    if (sourceFile !== newSourceFile && sourceFile.scriptSnapshot) {
+                        if (sourceFile.scriptSnapshot.dispose) {
+                            sourceFile.scriptSnapshot.dispose();
+                        }
+                        sourceFile.scriptSnapshot = undefined;
+                    }
+                    return newSourceFile;
+                }
+            }
+        }
+        return createLanguageServiceSourceFile(sourceFile.fileName, scriptSnapshot, sourceFile.languageVersion, version, true, sourceFile.scriptKind);
+    }
+    ts.updateLanguageServiceSourceFile = updateLanguageServiceSourceFile;
+    function createDocumentRegistry(useCaseSensitiveFileNames, currentDirectory) {
+        if (currentDirectory === void 0) { currentDirectory = ""; }
+        var buckets = {};
+        var getCanonicalFileName = ts.createGetCanonicalFileName(!!useCaseSensitiveFileNames);
+        function getKeyForCompilationSettings(settings) {
+            return ("_" + settings.target + "|" + settings.module + "|" + settings.noResolve + "|" + settings.jsx + "|" + settings.allowJs + "|" + settings.baseUrl + "|" + settings.typesRoot + "|" + settings.typesSearchPaths + "|" + JSON.stringify(settings.rootDirs) + "|" + JSON.stringify(settings.paths));
+        }
+        function getBucketForCompilationSettings(key, createIfMissing) {
+            var bucket = ts.lookUp(buckets, key);
+            if (!bucket && createIfMissing) {
+                buckets[key] = bucket = ts.createFileMap();
+            }
+            return bucket;
+        }
+        function reportStats() {
+            var bucketInfoArray = Object.keys(buckets).filter(function (name) { return name && name.charAt(0) === "_"; }).map(function (name) {
+                var entries = ts.lookUp(buckets, name);
+                var sourceFiles = [];
+                entries.forEachValue(function (key, entry) {
+                    sourceFiles.push({
+                        name: key,
+                        refCount: entry.languageServiceRefCount,
+                        references: entry.owners.slice(0)
+                    });
+                });
+                sourceFiles.sort(function (x, y) { return y.refCount - x.refCount; });
+                return {
+                    bucket: name,
+                    sourceFiles: sourceFiles
+                };
+            });
+            return JSON.stringify(bucketInfoArray, undefined, 2);
+        }
+        function acquireDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        }
+        function acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
+            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, true, scriptKind);
+        }
+        function updateDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        }
+        function updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
+            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, false, scriptKind);
+        }
+        function acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, acquiring, scriptKind) {
+            var bucket = getBucketForCompilationSettings(key, true);
+            var entry = bucket.get(path);
+            if (!entry) {
+                ts.Debug.assert(acquiring, "How could we be trying to update a document that the registry doesn't have?");
+                var sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, compilationSettings.target, version, false, scriptKind);
+                entry = {
+                    sourceFile: sourceFile,
+                    languageServiceRefCount: 0,
+                    owners: []
+                };
+                bucket.set(path, entry);
+            }
+            else {
+                if (entry.sourceFile.version !== version) {
+                    entry.sourceFile = updateLanguageServiceSourceFile(entry.sourceFile, scriptSnapshot, version, scriptSnapshot.getChangeRange(entry.sourceFile.scriptSnapshot));
+                }
+            }
+            if (acquiring) {
+                entry.languageServiceRefCount++;
+            }
+            return entry.sourceFile;
+        }
+        function releaseDocument(fileName, compilationSettings) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return releaseDocumentWithKey(path, key);
+        }
+        function releaseDocumentWithKey(path, key) {
+            var bucket = getBucketForCompilationSettings(key, false);
+            ts.Debug.assert(bucket !== undefined);
+            var entry = bucket.get(path);
+            entry.languageServiceRefCount--;
+            ts.Debug.assert(entry.languageServiceRefCount >= 0);
+            if (entry.languageServiceRefCount === 0) {
+                bucket.remove(path);
+            }
+        }
+        return {
+            acquireDocument: acquireDocument,
+            acquireDocumentWithKey: acquireDocumentWithKey,
+            updateDocument: updateDocument,
+            updateDocumentWithKey: updateDocumentWithKey,
+            releaseDocument: releaseDocument,
+            releaseDocumentWithKey: releaseDocumentWithKey,
+            reportStats: reportStats,
+            getKeyForCompilationSettings: getKeyForCompilationSettings
+        };
+    }
+    ts.createDocumentRegistry = createDocumentRegistry;
+    function preProcessFile(sourceText, readImportFiles, detectJavaScriptImports) {
+        if (readImportFiles === void 0) { readImportFiles = true; }
+        if (detectJavaScriptImports === void 0) { detectJavaScriptImports = false; }
+        var referencedFiles = [];
+        var typeReferenceDirectives = [];
+        var importedFiles = [];
+        var ambientExternalModules;
+        var isNoDefaultLib = false;
+        var braceNesting = 0;
+        var externalModule = false;
+        function nextToken() {
+            var token = scanner.scan();
+            if (token === 15) {
+                braceNesting++;
+            }
+            else if (token === 16) {
+                braceNesting--;
+            }
+            return token;
+        }
+        function processTripleSlashDirectives() {
+            var commentRanges = ts.getLeadingCommentRanges(sourceText, 0);
+            ts.forEach(commentRanges, function (commentRange) {
+                var comment = sourceText.substring(commentRange.pos, commentRange.end);
+                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, commentRange);
+                if (referencePathMatchResult) {
+                    isNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
+                    var fileReference = referencePathMatchResult.fileReference;
+                    if (fileReference) {
+                        var collection = referencePathMatchResult.isTypeReferenceDirective
+                            ? typeReferenceDirectives
+                            : referencedFiles;
+                        collection.push(fileReference);
+                    }
+                }
+            });
+        }
+        function getFileReference() {
+            var file = scanner.getTokenValue();
+            var pos = scanner.getTokenPos();
+            return {
+                fileName: file,
+                pos: pos,
+                end: pos + file.length
+            };
+        }
+        function recordAmbientExternalModule() {
+            if (!ambientExternalModules) {
+                ambientExternalModules = [];
+            }
+            ambientExternalModules.push({ ref: getFileReference(), depth: braceNesting });
+        }
+        function recordModuleName() {
+            importedFiles.push(getFileReference());
+            markAsExternalModuleIfTopLevel();
+        }
+        function markAsExternalModuleIfTopLevel() {
+            if (braceNesting === 0) {
+                externalModule = true;
+            }
+        }
+        function tryConsumeDeclare() {
+            var token = scanner.getToken();
+            if (token === 122) {
+                token = nextToken();
+                if (token === 125) {
+                    token = nextToken();
+                    if (token === 9) {
+                        recordAmbientExternalModule();
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeImport() {
+            var token = scanner.getToken();
+            if (token === 89) {
+                token = nextToken();
+                if (token === 9) {
+                    recordModuleName();
+                    return true;
+                }
+                else {
+                    if (token === 69 || ts.isKeyword(token)) {
+                        token = nextToken();
+                        if (token === 136) {
+                            token = nextToken();
+                            if (token === 9) {
+                                recordModuleName();
+                                return true;
+                            }
+                        }
+                        else if (token === 56) {
+                            if (tryConsumeRequireCall(true)) {
+                                return true;
+                            }
+                        }
+                        else if (token === 24) {
+                            token = nextToken();
+                        }
+                        else {
+                            return true;
+                        }
+                    }
+                    if (token === 15) {
+                        token = nextToken();
+                        while (token !== 16 && token !== 1) {
+                            token = nextToken();
+                        }
+                        if (token === 16) {
+                            token = nextToken();
+                            if (token === 136) {
+                                token = nextToken();
+                                if (token === 9) {
+                                    recordModuleName();
+                                }
+                            }
+                        }
+                    }
+                    else if (token === 37) {
+                        token = nextToken();
+                        if (token === 116) {
+                            token = nextToken();
+                            if (token === 69 || ts.isKeyword(token)) {
+                                token = nextToken();
+                                if (token === 136) {
+                                    token = nextToken();
+                                    if (token === 9) {
+                                        recordModuleName();
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeExport() {
+            var token = scanner.getToken();
+            if (token === 82) {
+                markAsExternalModuleIfTopLevel();
+                token = nextToken();
+                if (token === 15) {
+                    token = nextToken();
+                    while (token !== 16 && token !== 1) {
+                        token = nextToken();
+                    }
+                    if (token === 16) {
+                        token = nextToken();
+                        if (token === 136) {
+                            token = nextToken();
+                            if (token === 9) {
+                                recordModuleName();
+                            }
+                        }
+                    }
+                }
+                else if (token === 37) {
+                    token = nextToken();
+                    if (token === 136) {
+                        token = nextToken();
+                        if (token === 9) {
+                            recordModuleName();
+                        }
+                    }
+                }
+                else if (token === 89) {
+                    token = nextToken();
+                    if (token === 69 || ts.isKeyword(token)) {
+                        token = nextToken();
+                        if (token === 56) {
+                            if (tryConsumeRequireCall(true)) {
+                                return true;
+                            }
+                        }
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeRequireCall(skipCurrentToken) {
+            var token = skipCurrentToken ? nextToken() : scanner.getToken();
+            if (token === 129) {
+                token = nextToken();
+                if (token === 17) {
+                    token = nextToken();
+                    if (token === 9) {
+                        recordModuleName();
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeDefine() {
+            var token = scanner.getToken();
+            if (token === 69 && scanner.getTokenValue() === "define") {
+                token = nextToken();
+                if (token !== 17) {
+                    return true;
+                }
+                token = nextToken();
+                if (token === 9) {
+                    token = nextToken();
+                    if (token === 24) {
+                        token = nextToken();
+                    }
+                    else {
+                        return true;
+                    }
+                }
+                if (token !== 19) {
+                    return true;
+                }
+                token = nextToken();
+                var i = 0;
+                while (token !== 20 && token !== 1) {
+                    if (token === 9) {
+                        recordModuleName();
+                        i++;
+                    }
+                    token = nextToken();
+                }
+                return true;
+            }
+            return false;
+        }
+        function processImports() {
+            scanner.setText(sourceText);
+            nextToken();
+            while (true) {
+                if (scanner.getToken() === 1) {
+                    break;
+                }
+                if (tryConsumeDeclare() ||
+                    tryConsumeImport() ||
+                    tryConsumeExport() ||
+                    (detectJavaScriptImports && (tryConsumeRequireCall(false) || tryConsumeDefine()))) {
+                    continue;
+                }
+                else {
+                    nextToken();
+                }
+            }
+            scanner.setText(undefined);
+        }
+        if (readImportFiles) {
+            processImports();
+        }
+        processTripleSlashDirectives();
+        if (externalModule) {
+            if (ambientExternalModules) {
+                for (var _i = 0, ambientExternalModules_1 = ambientExternalModules; _i < ambientExternalModules_1.length; _i++) {
+                    var decl = ambientExternalModules_1[_i];
+                    importedFiles.push(decl.ref);
+                }
+            }
+            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: undefined };
+        }
+        else {
+            var ambientModuleNames = void 0;
+            if (ambientExternalModules) {
+                for (var _a = 0, ambientExternalModules_2 = ambientExternalModules; _a < ambientExternalModules_2.length; _a++) {
+                    var decl = ambientExternalModules_2[_a];
+                    if (decl.depth === 0) {
+                        if (!ambientModuleNames) {
+                            ambientModuleNames = [];
+                        }
+                        ambientModuleNames.push(decl.ref.fileName);
+                    }
+                    else {
+                        importedFiles.push(decl.ref);
+                    }
+                }
+            }
+            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: ambientModuleNames };
+        }
+    }
+    ts.preProcessFile = preProcessFile;
+    function getTargetLabel(referenceNode, labelName) {
+        while (referenceNode) {
+            if (referenceNode.kind === 214 && referenceNode.label.text === labelName) {
+                return referenceNode.label;
+            }
+            referenceNode = referenceNode.parent;
+        }
+        return undefined;
+    }
+    function isJumpStatementTarget(node) {
+        return node.kind === 69 &&
+            (node.parent.kind === 210 || node.parent.kind === 209) &&
+            node.parent.label === node;
+    }
+    function isLabelOfLabeledStatement(node) {
+        return node.kind === 69 &&
+            node.parent.kind === 214 &&
+            node.parent.label === node;
+    }
+    function isLabeledBy(node, labelName) {
+        for (var owner = node.parent; owner.kind === 214; owner = owner.parent) {
+            if (owner.label.text === labelName) {
+                return true;
+            }
+        }
+        return false;
+    }
+    function isLabelName(node) {
+        return isLabelOfLabeledStatement(node) || isJumpStatementTarget(node);
+    }
+    function isRightSideOfQualifiedName(node) {
+        return node.parent.kind === 139 && node.parent.right === node;
+    }
+    function isRightSideOfPropertyAccess(node) {
+        return node && node.parent && node.parent.kind === 172 && node.parent.name === node;
+    }
+    function isCallExpressionTarget(node) {
+        if (isRightSideOfPropertyAccess(node)) {
+            node = node.parent;
+        }
+        return node && node.parent && node.parent.kind === 174 && node.parent.expression === node;
+    }
+    function isNewExpressionTarget(node) {
+        if (isRightSideOfPropertyAccess(node)) {
+            node = node.parent;
+        }
+        return node && node.parent && node.parent.kind === 175 && node.parent.expression === node;
+    }
+    function isNameOfModuleDeclaration(node) {
+        return node.parent.kind === 225 && node.parent.name === node;
+    }
+    function isNameOfFunctionDeclaration(node) {
+        return node.kind === 69 &&
+            ts.isFunctionLike(node.parent) && node.parent.name === node;
+    }
+    function isObjectLiteralPropertyDeclaration(node) {
+        switch (node.kind) {
+            case 253:
+            case 254:
+            case 147:
+            case 149:
+            case 150:
+                return true;
+        }
+        return false;
+    }
+    function getContainingObjectLiteralElement(node) {
+        switch (node.kind) {
+            case 9:
+            case 8:
+                if (node.parent.kind === 140) {
+                    return isObjectLiteralPropertyDeclaration(node.parent.parent) ? node.parent.parent : undefined;
+                }
+            case 69:
+                return isObjectLiteralPropertyDeclaration(node.parent) && node.parent.name === node ? node.parent : undefined;
+        }
+        return undefined;
+    }
+    function isLiteralNameOfPropertyDeclarationOrIndexAccess(node) {
+        if (node.kind === 9 || node.kind === 8) {
+            switch (node.parent.kind) {
+                case 145:
+                case 144:
+                case 253:
+                case 255:
+                case 147:
+                case 146:
+                case 149:
+                case 150:
+                case 225:
+                    return node.parent.name === node;
+                case 173:
+                    return node.parent.argumentExpression === node;
+                case 140:
+                    return true;
+            }
+        }
+        return false;
+    }
+    function isNameOfExternalModuleImportOrDeclaration(node) {
+        if (node.kind === 9) {
+            return isNameOfModuleDeclaration(node) ||
+                (ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) && ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node);
+        }
+        return false;
+    }
+    function isInsideComment(sourceFile, token, position) {
+        return position <= token.getStart(sourceFile) &&
+            (isInsideCommentRange(ts.getTrailingCommentRanges(sourceFile.text, token.getFullStart())) ||
+                isInsideCommentRange(ts.getLeadingCommentRanges(sourceFile.text, token.getFullStart())));
+        function isInsideCommentRange(comments) {
+            return ts.forEach(comments, function (comment) {
+                if (comment.pos < position && position < comment.end) {
+                    return true;
+                }
+                else if (position === comment.end) {
+                    var text = sourceFile.text;
+                    var width = comment.end - comment.pos;
+                    if (width <= 2 || text.charCodeAt(comment.pos + 1) === 47) {
+                        return true;
+                    }
+                    else {
+                        return !(text.charCodeAt(comment.end - 1) === 47 &&
+                            text.charCodeAt(comment.end - 2) === 42);
+                    }
+                }
+                return false;
+            });
+        }
+    }
+    var keywordCompletions = [];
+    for (var i = 70; i <= 138; i++) {
+        keywordCompletions.push({
+            name: ts.tokenToString(i),
+            kind: ScriptElementKind.keyword,
+            kindModifiers: ScriptElementKindModifier.none,
+            sortText: "0"
+        });
+    }
+    function getContainerNode(node) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return undefined;
+            }
+            switch (node.kind) {
+                case 256:
+                case 147:
+                case 146:
+                case 220:
+                case 179:
+                case 149:
+                case 150:
+                case 221:
+                case 222:
+                case 224:
+                case 225:
+                    return node;
+            }
+        }
+    }
+    ts.getContainerNode = getContainerNode;
+    function getNodeKind(node) {
+        switch (node.kind) {
+            case 225: return ScriptElementKind.moduleElement;
+            case 221:
+            case 192:
+                return ScriptElementKind.classElement;
+            case 222: return ScriptElementKind.interfaceElement;
+            case 223: return ScriptElementKind.typeElement;
+            case 224: return ScriptElementKind.enumElement;
+            case 218:
+                return ts.isConst(node)
+                    ? ScriptElementKind.constElement
+                    : ts.isLet(node)
+                        ? ScriptElementKind.letElement
+                        : ScriptElementKind.variableElement;
+            case 220:
+            case 179:
+                return ScriptElementKind.functionElement;
+            case 149: return ScriptElementKind.memberGetAccessorElement;
+            case 150: return ScriptElementKind.memberSetAccessorElement;
+            case 147:
+            case 146:
+                return ScriptElementKind.memberFunctionElement;
+            case 145:
+            case 144:
+                return ScriptElementKind.memberVariableElement;
+            case 153: return ScriptElementKind.indexSignatureElement;
+            case 152: return ScriptElementKind.constructSignatureElement;
+            case 151: return ScriptElementKind.callSignatureElement;
+            case 148: return ScriptElementKind.constructorImplementationElement;
+            case 141: return ScriptElementKind.typeParameterElement;
+            case 255: return ScriptElementKind.variableElement;
+            case 142: return (node.flags & 92) ? ScriptElementKind.memberVariableElement : ScriptElementKind.parameterElement;
+            case 229:
+            case 234:
+            case 231:
+            case 238:
+            case 232:
+                return ScriptElementKind.alias;
+        }
+        return ScriptElementKind.unknown;
+    }
+    ts.getNodeKind = getNodeKind;
+    var CancellationTokenObject = (function () {
+        function CancellationTokenObject(cancellationToken) {
+            this.cancellationToken = cancellationToken;
+        }
+        CancellationTokenObject.prototype.isCancellationRequested = function () {
+            return this.cancellationToken && this.cancellationToken.isCancellationRequested();
+        };
+        CancellationTokenObject.prototype.throwIfCancellationRequested = function () {
+            if (this.isCancellationRequested()) {
+                throw new ts.OperationCanceledException();
+            }
+        };
+        return CancellationTokenObject;
+    }());
+    function createLanguageService(host, documentRegistry) {
+        if (documentRegistry === void 0) { documentRegistry = createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory()); }
+        var syntaxTreeCache = new SyntaxTreeCache(host);
+        var ruleProvider;
+        var program;
+        var lastProjectVersion;
+        var useCaseSensitivefileNames = false;
+        var cancellationToken = new CancellationTokenObject(host.getCancellationToken && host.getCancellationToken());
+        var currentDirectory = host.getCurrentDirectory();
+        if (!ts.localizedDiagnosticMessages && host.getLocalizedDiagnosticMessages) {
+            ts.localizedDiagnosticMessages = host.getLocalizedDiagnosticMessages();
+        }
+        function log(message) {
+            if (host.log) {
+                host.log(message);
+            }
+        }
+        var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitivefileNames);
+        function getValidSourceFile(fileName) {
+            var sourceFile = program.getSourceFile(fileName);
+            if (!sourceFile) {
+                throw new Error("Could not find file: '" + fileName + "'.");
+            }
+            return sourceFile;
+        }
+        function getRuleProvider(options) {
+            if (!ruleProvider) {
+                ruleProvider = new ts.formatting.RulesProvider();
+            }
+            ruleProvider.ensureUpToDate(options);
+            return ruleProvider;
+        }
+        function synchronizeHostData() {
+            if (host.getProjectVersion) {
+                var hostProjectVersion = host.getProjectVersion();
+                if (hostProjectVersion) {
+                    if (lastProjectVersion === hostProjectVersion) {
+                        return;
+                    }
+                    lastProjectVersion = hostProjectVersion;
+                }
+            }
+            var hostCache = new HostCache(host, getCanonicalFileName);
+            if (programUpToDate()) {
+                return;
+            }
+            var oldSettings = program && program.getCompilerOptions();
+            var newSettings = hostCache.compilationSettings();
+            var changesInCompilationSettingsAffectSyntax = oldSettings &&
+                (oldSettings.target !== newSettings.target ||
+                    oldSettings.module !== newSettings.module ||
+                    oldSettings.moduleResolution !== newSettings.moduleResolution ||
+                    oldSettings.noResolve !== newSettings.noResolve ||
+                    oldSettings.jsx !== newSettings.jsx ||
+                    oldSettings.allowJs !== newSettings.allowJs);
+            var compilerHost = {
+                getSourceFile: getOrCreateSourceFile,
+                getSourceFileByPath: getOrCreateSourceFileByPath,
+                getCancellationToken: function () { return cancellationToken; },
+                getCanonicalFileName: getCanonicalFileName,
+                useCaseSensitiveFileNames: function () { return useCaseSensitivefileNames; },
+                getNewLine: function () { return ts.getNewLineOrDefaultFromHost(host); },
+                getDefaultLibFileName: function (options) { return host.getDefaultLibFileName(options); },
+                writeFile: function (fileName, data, writeByteOrderMark) { },
+                getCurrentDirectory: function () { return currentDirectory; },
+                fileExists: function (fileName) {
+                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
+                    return hostCache.getOrCreateEntry(fileName) !== undefined;
+                },
+                readFile: function (fileName) {
+                    var entry = hostCache.getOrCreateEntry(fileName);
+                    return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
+                },
+                directoryExists: function (directoryName) {
+                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
+                    return ts.directoryProbablyExists(directoryName, host);
+                }
+            };
+            if (host.trace) {
+                compilerHost.trace = function (message) { return host.trace(message); };
+            }
+            if (host.resolveModuleNames) {
+                compilerHost.resolveModuleNames = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
+            }
+            if (host.resolveTypeReferenceDirectives) {
+                compilerHost.resolveTypeReferenceDirectives = function (typeReferenceDirectiveNames, containingFile) {
+                    return host.resolveTypeReferenceDirectives(typeReferenceDirectiveNames, containingFile);
+                };
+            }
+            var documentRegistryBucketKey = documentRegistry.getKeyForCompilationSettings(newSettings);
+            var newProgram = ts.createProgram(hostCache.getRootFileNames(), newSettings, compilerHost, program);
+            if (program) {
+                var oldSourceFiles = program.getSourceFiles();
+                var oldSettingsKey = documentRegistry.getKeyForCompilationSettings(oldSettings);
+                for (var _i = 0, oldSourceFiles_1 = oldSourceFiles; _i < oldSourceFiles_1.length; _i++) {
+                    var oldSourceFile = oldSourceFiles_1[_i];
+                    if (!newProgram.getSourceFile(oldSourceFile.fileName) || changesInCompilationSettingsAffectSyntax) {
+                        documentRegistry.releaseDocumentWithKey(oldSourceFile.path, oldSettingsKey);
+                    }
+                }
+            }
+            hostCache = undefined;
+            program = newProgram;
+            program.getTypeChecker();
+            return;
+            function getOrCreateSourceFile(fileName) {
+                return getOrCreateSourceFileByPath(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName));
+            }
+            function getOrCreateSourceFileByPath(fileName, path) {
+                ts.Debug.assert(hostCache !== undefined);
+                var hostFileInformation = hostCache.getOrCreateEntryByPath(fileName, path);
+                if (!hostFileInformation) {
+                    return undefined;
+                }
+                if (!changesInCompilationSettingsAffectSyntax) {
+                    var oldSourceFile = program && program.getSourceFileByPath(path);
+                    if (oldSourceFile) {
+                        ts.Debug.assert(hostFileInformation.scriptKind === oldSourceFile.scriptKind, "Registered script kind (" + oldSourceFile.scriptKind + ") should match new script kind (" + hostFileInformation.scriptKind + ") for file: " + path);
+                        return documentRegistry.updateDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
+                    }
+                }
+                return documentRegistry.acquireDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
+            }
+            function sourceFileUpToDate(sourceFile) {
+                if (!sourceFile) {
+                    return false;
+                }
+                var path = sourceFile.path || ts.toPath(sourceFile.fileName, currentDirectory, getCanonicalFileName);
+                return sourceFile.version === hostCache.getVersion(path);
+            }
+            function programUpToDate() {
+                if (!program) {
+                    return false;
+                }
+                var rootFileNames = hostCache.getRootFileNames();
+                if (program.getSourceFiles().length !== rootFileNames.length) {
+                    return false;
+                }
+                for (var _i = 0, rootFileNames_2 = rootFileNames; _i < rootFileNames_2.length; _i++) {
+                    var fileName = rootFileNames_2[_i];
+                    if (!sourceFileUpToDate(program.getSourceFile(fileName))) {
+                        return false;
+                    }
+                }
+                return ts.compareDataObjects(program.getCompilerOptions(), hostCache.compilationSettings());
+            }
+        }
+        function getProgram() {
+            synchronizeHostData();
+            return program;
+        }
+        function cleanupSemanticCache() {
+        }
+        function dispose() {
+            if (program) {
+                ts.forEach(program.getSourceFiles(), function (f) {
+                    return documentRegistry.releaseDocument(f.fileName, program.getCompilerOptions());
+                });
+            }
+        }
+        function getSyntacticDiagnostics(fileName) {
+            synchronizeHostData();
+            return program.getSyntacticDiagnostics(getValidSourceFile(fileName), cancellationToken);
+        }
+        function getSemanticDiagnostics(fileName) {
+            synchronizeHostData();
+            var targetSourceFile = getValidSourceFile(fileName);
+            var semanticDiagnostics = program.getSemanticDiagnostics(targetSourceFile, cancellationToken);
+            if (!program.getCompilerOptions().declaration) {
+                return semanticDiagnostics;
+            }
+            var declarationDiagnostics = program.getDeclarationDiagnostics(targetSourceFile, cancellationToken);
+            return ts.concatenate(semanticDiagnostics, declarationDiagnostics);
+        }
+        function getCompilerOptionsDiagnostics() {
+            synchronizeHostData();
+            return program.getOptionsDiagnostics(cancellationToken).concat(program.getGlobalDiagnostics(cancellationToken));
+        }
+        function getCompletionEntryDisplayNameForSymbol(symbol, target, performCharacterChecks, location) {
+            var displayName = ts.getDeclaredName(program.getTypeChecker(), symbol, location);
+            if (displayName) {
+                var firstCharCode = displayName.charCodeAt(0);
+                if ((symbol.flags & 1536) && (firstCharCode === 39 || firstCharCode === 34)) {
+                    return undefined;
+                }
+            }
+            return getCompletionEntryDisplayName(displayName, target, performCharacterChecks);
+        }
+        function getCompletionEntryDisplayName(name, target, performCharacterChecks) {
+            if (!name) {
+                return undefined;
+            }
+            name = ts.stripQuotes(name);
+            if (!name) {
+                return undefined;
+            }
+            if (performCharacterChecks) {
+                if (!ts.isIdentifier(name, target)) {
+                    return undefined;
+                }
+            }
+            return name;
+        }
+        function getCompletionData(fileName, position) {
+            var typeChecker = program.getTypeChecker();
+            var sourceFile = getValidSourceFile(fileName);
+            var isJavaScriptFile = ts.isSourceFileJavaScript(sourceFile);
+            var isJsDocTagName = false;
+            var start = new Date().getTime();
+            var currentToken = ts.getTokenAtPosition(sourceFile, position);
+            log("getCompletionData: Get current token: " + (new Date().getTime() - start));
+            start = new Date().getTime();
+            var insideComment = isInsideComment(sourceFile, currentToken, position);
+            log("getCompletionData: Is inside comment: " + (new Date().getTime() - start));
+            if (insideComment) {
+                if (ts.hasDocComment(sourceFile, position) && sourceFile.text.charCodeAt(position - 1) === 64) {
+                    isJsDocTagName = true;
+                }
+                var insideJsDocTagExpression = false;
+                var tag = ts.getJsDocTagAtPosition(sourceFile, position);
+                if (tag) {
+                    if (tag.tagName.pos <= position && position <= tag.tagName.end) {
+                        isJsDocTagName = true;
+                    }
+                    switch (tag.kind) {
+                        case 277:
+                        case 275:
+                        case 276:
+                            var tagWithExpression = tag;
+                            if (tagWithExpression.typeExpression) {
+                                insideJsDocTagExpression = tagWithExpression.typeExpression.pos < position && position < tagWithExpression.typeExpression.end;
+                            }
+                            break;
+                    }
+                }
+                if (isJsDocTagName) {
+                    return { symbols: undefined, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, isJsDocTagName: isJsDocTagName };
+                }
+                if (!insideJsDocTagExpression) {
+                    log("Returning an empty list because completion was inside a regular comment or plain text part of a JsDoc comment.");
+                    return undefined;
+                }
+            }
+            start = new Date().getTime();
+            var previousToken = ts.findPrecedingToken(position, sourceFile);
+            log("getCompletionData: Get previous token 1: " + (new Date().getTime() - start));
+            var contextToken = previousToken;
+            if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
+                var start_5 = new Date().getTime();
+                contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
+                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_5));
+            }
+            var node = currentToken;
+            var isRightOfDot = false;
+            var isRightOfOpenTag = false;
+            var isStartingCloseTag = false;
+            var location = ts.getTouchingPropertyName(sourceFile, position);
+            if (contextToken) {
+                if (isCompletionListBlocker(contextToken)) {
+                    log("Returning an empty list because completion was requested in an invalid position.");
+                    return undefined;
+                }
+                var parent_16 = contextToken.parent, kind = contextToken.kind;
+                if (kind === 21) {
+                    if (parent_16.kind === 172) {
+                        node = contextToken.parent.expression;
+                        isRightOfDot = true;
+                    }
+                    else if (parent_16.kind === 139) {
+                        node = contextToken.parent.left;
+                        isRightOfDot = true;
+                    }
+                    else {
+                        return undefined;
+                    }
+                }
+                else if (sourceFile.languageVariant === 1) {
+                    if (kind === 25) {
+                        isRightOfOpenTag = true;
+                        location = contextToken;
+                    }
+                    else if (kind === 39 && contextToken.parent.kind === 245) {
+                        isStartingCloseTag = true;
+                        location = contextToken;
+                    }
+                }
+            }
+            var semanticStart = new Date().getTime();
+            var isMemberCompletion;
+            var isNewIdentifierLocation;
+            var symbols = [];
+            if (isRightOfDot) {
+                getTypeScriptMemberSymbols();
+            }
+            else if (isRightOfOpenTag) {
+                var tagSymbols = typeChecker.getJsxIntrinsicTagNames();
+                if (tryGetGlobalSymbols()) {
+                    symbols = tagSymbols.concat(symbols.filter(function (s) { return !!(s.flags & (107455 | 8388608)); }));
+                }
+                else {
+                    symbols = tagSymbols;
+                }
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+            }
+            else if (isStartingCloseTag) {
+                var tagName = contextToken.parent.parent.openingElement.tagName;
+                var tagSymbol = typeChecker.getSymbolAtLocation(tagName);
+                if (!typeChecker.isUnknownSymbol(tagSymbol)) {
+                    symbols = [tagSymbol];
+                }
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+            }
+            else {
+                if (!tryGetGlobalSymbols()) {
+                    return undefined;
+                }
+            }
+            log("getCompletionData: Semantic work: " + (new Date().getTime() - semanticStart));
+            return { symbols: symbols, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, location: location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), isJsDocTagName: isJsDocTagName };
+            function getTypeScriptMemberSymbols() {
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+                if (node.kind === 69 || node.kind === 139 || node.kind === 172) {
+                    var symbol = typeChecker.getSymbolAtLocation(node);
+                    if (symbol && symbol.flags & 8388608) {
+                        symbol = typeChecker.getAliasedSymbol(symbol);
+                    }
+                    if (symbol && symbol.flags & 1952) {
+                        var exportedSymbols = typeChecker.getExportsOfModule(symbol);
+                        ts.forEach(exportedSymbols, function (symbol) {
+                            if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
+                                symbols.push(symbol);
+                            }
+                        });
+                    }
+                }
+                var type = typeChecker.getTypeAtLocation(node);
+                addTypeProperties(type);
+            }
+            function addTypeProperties(type) {
+                if (type) {
+                    for (var _i = 0, _a = type.getApparentProperties(); _i < _a.length; _i++) {
+                        var symbol = _a[_i];
+                        if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
+                            symbols.push(symbol);
+                        }
+                    }
+                    if (isJavaScriptFile && type.flags & 16384) {
+                        var unionType = type;
+                        for (var _b = 0, _c = unionType.types; _b < _c.length; _b++) {
+                            var elementType = _c[_b];
+                            addTypeProperties(elementType);
+                        }
+                    }
+                }
+            }
+            function tryGetGlobalSymbols() {
+                var objectLikeContainer;
+                var namedImportsOrExports;
+                var jsxContainer;
+                if (objectLikeContainer = tryGetObjectLikeCompletionContainer(contextToken)) {
+                    return tryGetObjectLikeCompletionSymbols(objectLikeContainer);
+                }
+                if (namedImportsOrExports = tryGetNamedImportsOrExportsForCompletion(contextToken)) {
+                    return tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports);
+                }
+                if (jsxContainer = tryGetContainingJsxElement(contextToken)) {
+                    var attrsType = void 0;
+                    if ((jsxContainer.kind === 242) || (jsxContainer.kind === 243)) {
+                        attrsType = typeChecker.getJsxElementAttributesType(jsxContainer);
+                        if (attrsType) {
+                            symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), jsxContainer.attributes);
+                            isMemberCompletion = true;
+                            isNewIdentifierLocation = false;
+                            return true;
+                        }
+                    }
+                }
+                isMemberCompletion = false;
+                isNewIdentifierLocation = isNewIdentifierDefinitionLocation(contextToken);
+                if (previousToken !== contextToken) {
+                    ts.Debug.assert(!!previousToken, "Expected 'contextToken' to be defined when different from 'previousToken'.");
+                }
+                var adjustedPosition = previousToken !== contextToken ?
+                    previousToken.getStart() :
+                    position;
+                var scopeNode = getScopeNode(contextToken, adjustedPosition, sourceFile) || sourceFile;
+                var symbolMeanings = 793056 | 107455 | 1536 | 8388608;
+                symbols = typeChecker.getSymbolsInScope(scopeNode, symbolMeanings);
+                return true;
+            }
+            function getScopeNode(initialToken, position, sourceFile) {
+                var scope = initialToken;
+                while (scope && !ts.positionBelongsToNode(scope, position, sourceFile)) {
+                    scope = scope.parent;
+                }
+                return scope;
+            }
+            function isCompletionListBlocker(contextToken) {
+                var start = new Date().getTime();
+                var result = isInStringOrRegularExpressionOrTemplateLiteral(contextToken) ||
+                    isSolelyIdentifierDefinitionLocation(contextToken) ||
+                    isDotOfNumericLiteral(contextToken) ||
+                    isInJsxText(contextToken);
+                log("getCompletionsAtPosition: isCompletionListBlocker: " + (new Date().getTime() - start));
+                return result;
+            }
+            function isInJsxText(contextToken) {
+                if (contextToken.kind === 244) {
+                    return true;
+                }
+                if (contextToken.kind === 27 && contextToken.parent) {
+                    if (contextToken.parent.kind === 243) {
+                        return true;
+                    }
+                    if (contextToken.parent.kind === 245 || contextToken.parent.kind === 242) {
+                        return contextToken.parent.parent && contextToken.parent.parent.kind === 241;
+                    }
+                }
+                return false;
+            }
+            function isNewIdentifierDefinitionLocation(previousToken) {
+                if (previousToken) {
+                    var containingNodeKind = previousToken.parent.kind;
+                    switch (previousToken.kind) {
+                        case 24:
+                            return containingNodeKind === 174
+                                || containingNodeKind === 148
+                                || containingNodeKind === 175
+                                || containingNodeKind === 170
+                                || containingNodeKind === 187
+                                || containingNodeKind === 156;
+                        case 17:
+                            return containingNodeKind === 174
+                                || containingNodeKind === 148
+                                || containingNodeKind === 175
+                                || containingNodeKind === 178
+                                || containingNodeKind === 164;
+                        case 19:
+                            return containingNodeKind === 170
+                                || containingNodeKind === 153
+                                || containingNodeKind === 140;
+                        case 125:
+                        case 126:
+                            return true;
+                        case 21:
+                            return containingNodeKind === 225;
+                        case 15:
+                            return containingNodeKind === 221;
+                        case 56:
+                            return containingNodeKind === 218
+                                || containingNodeKind === 187;
+                        case 12:
+                            return containingNodeKind === 189;
+                        case 13:
+                            return containingNodeKind === 197;
+                        case 112:
+                        case 110:
+                        case 111:
+                            return containingNodeKind === 145;
+                    }
+                    switch (previousToken.getText()) {
+                        case "public":
+                        case "protected":
+                        case "private":
+                            return true;
+                    }
+                }
+                return false;
+            }
+            function isInStringOrRegularExpressionOrTemplateLiteral(contextToken) {
+                if (contextToken.kind === 9
+                    || contextToken.kind === 166
+                    || contextToken.kind === 10
+                    || ts.isTemplateLiteralKind(contextToken.kind)) {
+                    var start_6 = contextToken.getStart();
+                    var end = contextToken.getEnd();
+                    if (start_6 < position && position < end) {
+                        return true;
+                    }
+                    if (position === end) {
+                        return !!contextToken.isUnterminated
+                            || contextToken.kind === 10;
+                    }
+                }
+                return false;
+            }
+            function tryGetObjectLikeCompletionSymbols(objectLikeContainer) {
+                isMemberCompletion = true;
+                var typeForObject;
+                var existingMembers;
+                if (objectLikeContainer.kind === 171) {
+                    isNewIdentifierLocation = true;
+                    typeForObject = typeChecker.getContextualType(objectLikeContainer);
+                    existingMembers = objectLikeContainer.properties;
+                }
+                else if (objectLikeContainer.kind === 167) {
+                    isNewIdentifierLocation = false;
+                    var rootDeclaration = ts.getRootDeclaration(objectLikeContainer.parent);
+                    if (ts.isVariableLike(rootDeclaration)) {
+                        var canGetType = !!(rootDeclaration.initializer || rootDeclaration.type);
+                        if (!canGetType && rootDeclaration.kind === 142) {
+                            if (ts.isExpression(rootDeclaration.parent)) {
+                                canGetType = !!typeChecker.getContextualType(rootDeclaration.parent);
+                            }
+                            else if (rootDeclaration.parent.kind === 147 || rootDeclaration.parent.kind === 150) {
+                                canGetType = ts.isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(rootDeclaration.parent.parent);
+                            }
+                        }
+                        if (canGetType) {
+                            typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
+                            existingMembers = objectLikeContainer.elements;
+                        }
+                    }
+                    else {
+                        ts.Debug.fail("Root declaration is not variable-like.");
+                    }
+                }
+                else {
+                    ts.Debug.fail("Expected object literal or binding pattern, got " + objectLikeContainer.kind);
+                }
+                if (!typeForObject) {
+                    return false;
+                }
+                var typeMembers = typeChecker.getPropertiesOfType(typeForObject);
+                if (typeMembers && typeMembers.length > 0) {
+                    symbols = filterObjectMembersList(typeMembers, existingMembers);
+                }
+                return true;
+            }
+            function tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports) {
+                var declarationKind = namedImportsOrExports.kind === 233 ?
+                    230 :
+                    236;
+                var importOrExportDeclaration = ts.getAncestor(namedImportsOrExports, declarationKind);
+                var moduleSpecifier = importOrExportDeclaration.moduleSpecifier;
+                if (!moduleSpecifier) {
+                    return false;
+                }
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+                var exports;
+                var moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(importOrExportDeclaration.moduleSpecifier);
+                if (moduleSpecifierSymbol) {
+                    exports = typeChecker.getExportsOfModule(moduleSpecifierSymbol);
+                }
+                symbols = exports ? filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements) : emptyArray;
+                return true;
+            }
+            function tryGetObjectLikeCompletionContainer(contextToken) {
+                if (contextToken) {
+                    switch (contextToken.kind) {
+                        case 15:
+                        case 24:
+                            var parent_17 = contextToken.parent;
+                            if (parent_17 && (parent_17.kind === 171 || parent_17.kind === 167)) {
+                                return parent_17;
+                            }
+                            break;
+                    }
+                }
+                return undefined;
+            }
+            function tryGetNamedImportsOrExportsForCompletion(contextToken) {
+                if (contextToken) {
+                    switch (contextToken.kind) {
+                        case 15:
+                        case 24:
+                            switch (contextToken.parent.kind) {
+                                case 233:
+                                case 237:
+                                    return contextToken.parent;
+                            }
+                    }
+                }
+                return undefined;
+            }
+            function tryGetContainingJsxElement(contextToken) {
+                if (contextToken) {
+                    var parent_18 = contextToken.parent;
+                    switch (contextToken.kind) {
+                        case 26:
+                        case 39:
+                        case 69:
+                        case 246:
+                        case 247:
+                            if (parent_18 && (parent_18.kind === 242 || parent_18.kind === 243)) {
+                                return parent_18;
+                            }
+                            else if (parent_18.kind === 246) {
+                                return parent_18.parent;
+                            }
+                            break;
+                        case 9:
+                            if (parent_18 && ((parent_18.kind === 246) || (parent_18.kind === 247))) {
+                                return parent_18.parent;
+                            }
+                            break;
+                        case 16:
+                            if (parent_18 &&
+                                parent_18.kind === 248 &&
+                                parent_18.parent &&
+                                (parent_18.parent.kind === 246)) {
+                                return parent_18.parent.parent;
+                            }
+                            if (parent_18 && parent_18.kind === 247) {
+                                return parent_18.parent;
+                            }
+                            break;
+                    }
+                }
+                return undefined;
+            }
+            function isFunction(kind) {
+                switch (kind) {
+                    case 179:
+                    case 180:
+                    case 220:
+                    case 147:
+                    case 146:
+                    case 149:
+                    case 150:
+                    case 151:
+                    case 152:
+                    case 153:
+                        return true;
+                }
+                return false;
+            }
+            function isSolelyIdentifierDefinitionLocation(contextToken) {
+                var containingNodeKind = contextToken.parent.kind;
+                switch (contextToken.kind) {
+                    case 24:
+                        return containingNodeKind === 218 ||
+                            containingNodeKind === 219 ||
+                            containingNodeKind === 200 ||
+                            containingNodeKind === 224 ||
+                            isFunction(containingNodeKind) ||
+                            containingNodeKind === 221 ||
+                            containingNodeKind === 192 ||
+                            containingNodeKind === 222 ||
+                            containingNodeKind === 168 ||
+                            containingNodeKind === 223;
+                    case 21:
+                        return containingNodeKind === 168;
+                    case 54:
+                        return containingNodeKind === 169;
+                    case 19:
+                        return containingNodeKind === 168;
+                    case 17:
+                        return containingNodeKind === 252 ||
+                            isFunction(containingNodeKind);
+                    case 15:
+                        return containingNodeKind === 224 ||
+                            containingNodeKind === 222 ||
+                            containingNodeKind === 159;
+                    case 23:
+                        return containingNodeKind === 144 &&
+                            contextToken.parent && contextToken.parent.parent &&
+                            (contextToken.parent.parent.kind === 222 ||
+                                contextToken.parent.parent.kind === 159);
+                    case 25:
+                        return containingNodeKind === 221 ||
+                            containingNodeKind === 192 ||
+                            containingNodeKind === 222 ||
+                            containingNodeKind === 223 ||
+                            isFunction(containingNodeKind);
+                    case 113:
+                        return containingNodeKind === 145;
+                    case 22:
+                        return containingNodeKind === 142 ||
+                            (contextToken.parent && contextToken.parent.parent &&
+                                contextToken.parent.parent.kind === 168);
+                    case 112:
+                    case 110:
+                    case 111:
+                        return containingNodeKind === 142;
+                    case 116:
+                        return containingNodeKind === 234 ||
+                            containingNodeKind === 238 ||
+                            containingNodeKind === 232;
+                    case 73:
+                    case 81:
+                    case 107:
+                    case 87:
+                    case 102:
+                    case 123:
+                    case 131:
+                    case 89:
+                    case 108:
+                    case 74:
+                    case 114:
+                    case 134:
+                        return true;
+                }
+                switch (contextToken.getText()) {
+                    case "abstract":
+                    case "async":
+                    case "class":
+                    case "const":
+                    case "declare":
+                    case "enum":
+                    case "function":
+                    case "interface":
+                    case "let":
+                    case "private":
+                    case "protected":
+                    case "public":
+                    case "static":
+                    case "var":
+                    case "yield":
+                        return true;
+                }
+                return false;
+            }
+            function isDotOfNumericLiteral(contextToken) {
+                if (contextToken.kind === 8) {
+                    var text = contextToken.getFullText();
+                    return text.charAt(text.length - 1) === ".";
+                }
+                return false;
+            }
+            function filterNamedImportOrExportCompletionItems(exportsOfModule, namedImportsOrExports) {
+                var existingImportsOrExports = {};
+                for (var _i = 0, namedImportsOrExports_1 = namedImportsOrExports; _i < namedImportsOrExports_1.length; _i++) {
+                    var element = namedImportsOrExports_1[_i];
+                    if (element.getStart() <= position && position <= element.getEnd()) {
+                        continue;
+                    }
+                    var name_40 = element.propertyName || element.name;
+                    existingImportsOrExports[name_40.text] = true;
+                }
+                if (ts.isEmpty(existingImportsOrExports)) {
+                    return ts.filter(exportsOfModule, function (e) { return e.name !== "default"; });
+                }
+                return ts.filter(exportsOfModule, function (e) { return e.name !== "default" && !ts.lookUp(existingImportsOrExports, e.name); });
+            }
+            function filterObjectMembersList(contextualMemberSymbols, existingMembers) {
+                if (!existingMembers || existingMembers.length === 0) {
+                    return contextualMemberSymbols;
+                }
+                var existingMemberNames = {};
+                for (var _i = 0, existingMembers_1 = existingMembers; _i < existingMembers_1.length; _i++) {
+                    var m = existingMembers_1[_i];
+                    if (m.kind !== 253 &&
+                        m.kind !== 254 &&
+                        m.kind !== 169 &&
+                        m.kind !== 147) {
+                        continue;
+                    }
+                    if (m.getStart() <= position && position <= m.getEnd()) {
+                        continue;
+                    }
+                    var existingName = void 0;
+                    if (m.kind === 169 && m.propertyName) {
+                        if (m.propertyName.kind === 69) {
+                            existingName = m.propertyName.text;
+                        }
+                    }
+                    else {
+                        existingName = m.name.text;
+                    }
+                    existingMemberNames[existingName] = true;
+                }
+                return ts.filter(contextualMemberSymbols, function (m) { return !ts.lookUp(existingMemberNames, m.name); });
+            }
+            function filterJsxAttributes(symbols, attributes) {
+                var seenNames = {};
+                for (var _i = 0, attributes_1 = attributes; _i < attributes_1.length; _i++) {
+                    var attr = attributes_1[_i];
+                    if (attr.getStart() <= position && position <= attr.getEnd()) {
+                        continue;
+                    }
+                    if (attr.kind === 246) {
+                        seenNames[attr.name.text] = true;
+                    }
+                }
+                return ts.filter(symbols, function (a) { return !ts.lookUp(seenNames, a.name); });
+            }
+        }
+        function getCompletionsAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            if (ts.isInString(sourceFile, position)) {
+                return getStringLiteralCompletionEntries(sourceFile, position);
+            }
+            var completionData = getCompletionData(fileName, position);
+            if (!completionData) {
+                return undefined;
+            }
+            var symbols = completionData.symbols, isMemberCompletion = completionData.isMemberCompletion, isNewIdentifierLocation = completionData.isNewIdentifierLocation, location = completionData.location, isJsDocTagName = completionData.isJsDocTagName;
+            if (isJsDocTagName) {
+                return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: getAllJsDocCompletionEntries() };
+            }
+            var entries = [];
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                var uniqueNames = getCompletionEntriesFromSymbols(symbols, entries, location, false);
+                ts.addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames));
+            }
+            else {
+                if (!symbols || symbols.length === 0) {
+                    if (sourceFile.languageVariant === 1 &&
+                        location.parent && location.parent.kind === 245) {
+                        var tagName = location.parent.parent.openingElement.tagName;
+                        entries.push({
+                            name: tagName.text,
+                            kind: undefined,
+                            kindModifiers: undefined,
+                            sortText: "0"
+                        });
+                    }
+                    else {
+                        return undefined;
+                    }
+                }
+                getCompletionEntriesFromSymbols(symbols, entries, location, true);
+            }
+            if (!isMemberCompletion && !isJsDocTagName) {
+                ts.addRange(entries, keywordCompletions);
+            }
+            return { isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries: entries };
+            function getJavaScriptCompletionEntries(sourceFile, position, uniqueNames) {
+                var entries = [];
+                var target = program.getCompilerOptions().target;
+                var nameTable = getNameTable(sourceFile);
+                for (var name_41 in nameTable) {
+                    if (nameTable[name_41] === position) {
+                        continue;
+                    }
+                    if (!uniqueNames[name_41]) {
+                        uniqueNames[name_41] = name_41;
+                        var displayName = getCompletionEntryDisplayName(name_41, target, true);
+                        if (displayName) {
+                            var entry = {
+                                name: displayName,
+                                kind: ScriptElementKind.warning,
+                                kindModifiers: "",
+                                sortText: "1"
+                            };
+                            entries.push(entry);
+                        }
+                    }
+                }
+                return entries;
+            }
+            function getAllJsDocCompletionEntries() {
+                return jsDocCompletionEntries || (jsDocCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
+                    return {
+                        name: tagName,
+                        kind: ScriptElementKind.keyword,
+                        kindModifiers: "",
+                        sortText: "0"
+                    };
+                }));
+            }
+            function createCompletionEntry(symbol, location, performCharacterChecks) {
+                var displayName = getCompletionEntryDisplayNameForSymbol(symbol, program.getCompilerOptions().target, performCharacterChecks, location);
+                if (!displayName) {
+                    return undefined;
+                }
+                return {
+                    name: displayName,
+                    kind: getSymbolKind(symbol, location),
+                    kindModifiers: getSymbolModifiers(symbol),
+                    sortText: "0"
+                };
+            }
+            function getCompletionEntriesFromSymbols(symbols, entries, location, performCharacterChecks) {
+                var start = new Date().getTime();
+                var uniqueNames = {};
+                if (symbols) {
+                    for (var _i = 0, symbols_4 = symbols; _i < symbols_4.length; _i++) {
+                        var symbol = symbols_4[_i];
+                        var entry = createCompletionEntry(symbol, location, performCharacterChecks);
+                        if (entry) {
+                            var id = ts.escapeIdentifier(entry.name);
+                            if (!ts.lookUp(uniqueNames, id)) {
+                                entries.push(entry);
+                                uniqueNames[id] = id;
+                            }
+                        }
+                    }
+                }
+                log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (new Date().getTime() - start));
+                return uniqueNames;
+            }
+            function getStringLiteralCompletionEntries(sourceFile, position) {
+                var node = ts.findPrecedingToken(position, sourceFile);
+                if (!node || node.kind !== 9) {
+                    return undefined;
+                }
+                var argumentInfo = ts.SignatureHelp.getContainingArgumentInfo(node, position, sourceFile);
+                if (argumentInfo) {
+                    return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo);
+                }
+                else if (ts.isElementAccessExpression(node.parent) && node.parent.argumentExpression === node) {
+                    return getStringLiteralCompletionEntriesFromElementAccess(node.parent);
+                }
+                else {
+                    return getStringLiteralCompletionEntriesFromContextualType(node);
+                }
+            }
+            function getStringLiteralCompletionEntriesFromCallExpression(argumentInfo) {
+                var typeChecker = program.getTypeChecker();
+                var candidates = [];
+                var entries = [];
+                typeChecker.getResolvedSignature(argumentInfo.invocation, candidates);
+                for (var _i = 0, candidates_3 = candidates; _i < candidates_3.length; _i++) {
+                    var candidate = candidates_3[_i];
+                    if (candidate.parameters.length > argumentInfo.argumentIndex) {
+                        var parameter = candidate.parameters[argumentInfo.argumentIndex];
+                        addStringLiteralCompletionsFromType(typeChecker.getTypeAtLocation(parameter.valueDeclaration), entries);
+                    }
+                }
+                if (entries.length) {
+                    return { isMemberCompletion: false, isNewIdentifierLocation: true, entries: entries };
+                }
+                return undefined;
+            }
+            function getStringLiteralCompletionEntriesFromElementAccess(node) {
+                var typeChecker = program.getTypeChecker();
+                var type = typeChecker.getTypeAtLocation(node.expression);
+                var entries = [];
+                if (type) {
+                    getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, node, false);
+                    if (entries.length) {
+                        return { isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
+                    }
+                }
+                return undefined;
+            }
+            function getStringLiteralCompletionEntriesFromContextualType(node) {
+                var typeChecker = program.getTypeChecker();
+                var type = typeChecker.getContextualType(node);
+                if (type) {
+                    var entries_1 = [];
+                    addStringLiteralCompletionsFromType(type, entries_1);
+                    if (entries_1.length) {
+                        return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: entries_1 };
+                    }
+                }
+                return undefined;
+            }
+            function addStringLiteralCompletionsFromType(type, result) {
+                if (!type) {
+                    return;
+                }
+                if (type.flags & 16384) {
+                    ts.forEach(type.types, function (t) { return addStringLiteralCompletionsFromType(t, result); });
+                }
+                else {
+                    if (type.flags & 256) {
+                        result.push({
+                            name: type.text,
+                            kindModifiers: ScriptElementKindModifier.none,
+                            kind: ScriptElementKind.variableElement,
+                            sortText: "0"
+                        });
+                    }
+                }
+            }
+        }
+        function getCompletionEntryDetails(fileName, position, entryName) {
+            synchronizeHostData();
+            var completionData = getCompletionData(fileName, position);
+            if (completionData) {
+                var symbols = completionData.symbols, location_2 = completionData.location;
+                var target_2 = program.getCompilerOptions().target;
+                var symbol = ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(s, target_2, false, location_2) === entryName ? s : undefined; });
+                if (symbol) {
+                    var _a = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, getValidSourceFile(fileName), location_2, location_2, 7), displayParts = _a.displayParts, documentation = _a.documentation, symbolKind = _a.symbolKind;
+                    return {
+                        name: entryName,
+                        kindModifiers: getSymbolModifiers(symbol),
+                        kind: symbolKind,
+                        displayParts: displayParts,
+                        documentation: documentation
+                    };
+                }
+            }
+            var keywordCompletion = ts.forEach(keywordCompletions, function (c) { return c.name === entryName; });
+            if (keywordCompletion) {
+                return {
+                    name: entryName,
+                    kind: ScriptElementKind.keyword,
+                    kindModifiers: ScriptElementKindModifier.none,
+                    displayParts: [ts.displayPart(entryName, SymbolDisplayPartKind.keyword)],
+                    documentation: undefined
+                };
+            }
+            return undefined;
+        }
+        function getSymbolKind(symbol, location) {
+            var flags = symbol.getFlags();
+            if (flags & 32)
+                return ts.getDeclarationOfKind(symbol, 192) ?
+                    ScriptElementKind.localClassElement : ScriptElementKind.classElement;
+            if (flags & 384)
+                return ScriptElementKind.enumElement;
+            if (flags & 524288)
+                return ScriptElementKind.typeElement;
+            if (flags & 64)
+                return ScriptElementKind.interfaceElement;
+            if (flags & 262144)
+                return ScriptElementKind.typeParameterElement;
+            var result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location);
+            if (result === ScriptElementKind.unknown) {
+                if (flags & 262144)
+                    return ScriptElementKind.typeParameterElement;
+                if (flags & 8)
+                    return ScriptElementKind.variableElement;
+                if (flags & 8388608)
+                    return ScriptElementKind.alias;
+                if (flags & 1536)
+                    return ScriptElementKind.moduleElement;
+            }
+            return result;
+        }
+        function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location) {
+            var typeChecker = program.getTypeChecker();
+            if (typeChecker.isUndefinedSymbol(symbol)) {
+                return ScriptElementKind.variableElement;
+            }
+            if (typeChecker.isArgumentsSymbol(symbol)) {
+                return ScriptElementKind.localVariableElement;
+            }
+            if (location.kind === 97 && ts.isExpression(location)) {
+                return ScriptElementKind.parameterElement;
+            }
+            if (flags & 3) {
+                if (ts.isFirstDeclarationOfSymbolParameter(symbol)) {
+                    return ScriptElementKind.parameterElement;
+                }
+                else if (symbol.valueDeclaration && ts.isConst(symbol.valueDeclaration)) {
+                    return ScriptElementKind.constElement;
+                }
+                else if (ts.forEach(symbol.declarations, ts.isLet)) {
+                    return ScriptElementKind.letElement;
+                }
+                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localVariableElement : ScriptElementKind.variableElement;
+            }
+            if (flags & 16)
+                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localFunctionElement : ScriptElementKind.functionElement;
+            if (flags & 32768)
+                return ScriptElementKind.memberGetAccessorElement;
+            if (flags & 65536)
+                return ScriptElementKind.memberSetAccessorElement;
+            if (flags & 8192)
+                return ScriptElementKind.memberFunctionElement;
+            if (flags & 16384)
+                return ScriptElementKind.constructorImplementationElement;
+            if (flags & 4) {
+                if (flags & 268435456) {
+                    var unionPropertyKind = ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
+                        var rootSymbolFlags = rootSymbol.getFlags();
+                        if (rootSymbolFlags & (98308 | 3)) {
+                            return ScriptElementKind.memberVariableElement;
+                        }
+                        ts.Debug.assert(!!(rootSymbolFlags & 8192));
+                    });
+                    if (!unionPropertyKind) {
+                        var typeOfUnionProperty = typeChecker.getTypeOfSymbolAtLocation(symbol, location);
+                        if (typeOfUnionProperty.getCallSignatures().length) {
+                            return ScriptElementKind.memberFunctionElement;
+                        }
+                        return ScriptElementKind.memberVariableElement;
+                    }
+                    return unionPropertyKind;
+                }
+                return ScriptElementKind.memberVariableElement;
+            }
+            return ScriptElementKind.unknown;
+        }
+        function getSymbolModifiers(symbol) {
+            return symbol && symbol.declarations && symbol.declarations.length > 0
+                ? ts.getNodeModifiers(symbol.declarations[0])
+                : ScriptElementKindModifier.none;
+        }
+        function getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, enclosingDeclaration, location, semanticMeaning) {
+            if (semanticMeaning === void 0) { semanticMeaning = getMeaningFromLocation(location); }
+            var typeChecker = program.getTypeChecker();
+            var displayParts = [];
+            var documentation;
+            var symbolFlags = symbol.flags;
+            var symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, symbolFlags, location);
+            var hasAddedSymbolInfo;
+            var isThisExpression = location.kind === 97 && ts.isExpression(location);
+            var type;
+            if (symbolKind !== ScriptElementKind.unknown || symbolFlags & 32 || symbolFlags & 8388608) {
+                if (symbolKind === ScriptElementKind.memberGetAccessorElement || symbolKind === ScriptElementKind.memberSetAccessorElement) {
+                    symbolKind = ScriptElementKind.memberVariableElement;
+                }
+                var signature = void 0;
+                type = isThisExpression ? typeChecker.getTypeAtLocation(location) : typeChecker.getTypeOfSymbolAtLocation(symbol, location);
+                if (type) {
+                    if (location.parent && location.parent.kind === 172) {
+                        var right = location.parent.name;
+                        if (right === location || (right && right.getFullWidth() === 0)) {
+                            location = location.parent;
+                        }
+                    }
+                    var callExpression = void 0;
+                    if (location.kind === 174 || location.kind === 175) {
+                        callExpression = location;
+                    }
+                    else if (isCallExpressionTarget(location) || isNewExpressionTarget(location)) {
+                        callExpression = location.parent;
+                    }
+                    if (callExpression) {
+                        var candidateSignatures = [];
+                        signature = typeChecker.getResolvedSignature(callExpression, candidateSignatures);
+                        if (!signature && candidateSignatures.length) {
+                            signature = candidateSignatures[0];
+                        }
+                        var useConstructSignatures = callExpression.kind === 175 || callExpression.expression.kind === 95;
+                        var allSignatures = useConstructSignatures ? type.getConstructSignatures() : type.getCallSignatures();
+                        if (!ts.contains(allSignatures, signature.target) && !ts.contains(allSignatures, signature)) {
+                            signature = allSignatures.length ? allSignatures[0] : undefined;
+                        }
+                        if (signature) {
+                            if (useConstructSignatures && (symbolFlags & 32)) {
+                                symbolKind = ScriptElementKind.constructorImplementationElement;
+                                addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
+                            }
+                            else if (symbolFlags & 8388608) {
+                                symbolKind = ScriptElementKind.alias;
+                                pushTypePart(symbolKind);
+                                displayParts.push(ts.spacePart());
+                                if (useConstructSignatures) {
+                                    displayParts.push(ts.keywordPart(92));
+                                    displayParts.push(ts.spacePart());
+                                }
+                                addFullSymbolName(symbol);
+                            }
+                            else {
+                                addPrefixForAnyFunctionOrVar(symbol, symbolKind);
+                            }
+                            switch (symbolKind) {
+                                case ScriptElementKind.memberVariableElement:
+                                case ScriptElementKind.variableElement:
+                                case ScriptElementKind.constElement:
+                                case ScriptElementKind.letElement:
+                                case ScriptElementKind.parameterElement:
+                                case ScriptElementKind.localVariableElement:
+                                    displayParts.push(ts.punctuationPart(54));
+                                    displayParts.push(ts.spacePart());
+                                    if (useConstructSignatures) {
+                                        displayParts.push(ts.keywordPart(92));
+                                        displayParts.push(ts.spacePart());
+                                    }
+                                    if (!(type.flags & 65536) && type.symbol) {
+                                        ts.addRange(displayParts, ts.symbolToDisplayParts(typeChecker, type.symbol, enclosingDeclaration, undefined, 1));
+                                    }
+                                    addSignatureDisplayParts(signature, allSignatures, 8);
+                                    break;
+                                default:
+                                    addSignatureDisplayParts(signature, allSignatures);
+                            }
+                            hasAddedSymbolInfo = true;
+                        }
+                    }
+                    else if ((isNameOfFunctionDeclaration(location) && !(symbol.flags & 98304)) ||
+                        (location.kind === 121 && location.parent.kind === 148)) {
+                        var functionDeclaration = location.parent;
+                        var allSignatures = functionDeclaration.kind === 148 ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
+                        if (!typeChecker.isImplementationOfOverload(functionDeclaration)) {
+                            signature = typeChecker.getSignatureFromDeclaration(functionDeclaration);
+                        }
+                        else {
+                            signature = allSignatures[0];
+                        }
+                        if (functionDeclaration.kind === 148) {
+                            symbolKind = ScriptElementKind.constructorImplementationElement;
+                            addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
+                        }
+                        else {
+                            addPrefixForAnyFunctionOrVar(functionDeclaration.kind === 151 &&
+                                !(type.symbol.flags & 2048 || type.symbol.flags & 4096) ? type.symbol : symbol, symbolKind);
+                        }
+                        addSignatureDisplayParts(signature, allSignatures);
+                        hasAddedSymbolInfo = true;
+                    }
+                }
+            }
+            if (symbolFlags & 32 && !hasAddedSymbolInfo && !isThisExpression) {
+                if (ts.getDeclarationOfKind(symbol, 192)) {
+                    pushTypePart(ScriptElementKind.localClassElement);
+                }
+                else {
+                    displayParts.push(ts.keywordPart(73));
+                }
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                writeTypeParametersOfSymbol(symbol, sourceFile);
+            }
+            if ((symbolFlags & 64) && (semanticMeaning & 2)) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.keywordPart(107));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                writeTypeParametersOfSymbol(symbol, sourceFile);
+            }
+            if (symbolFlags & 524288) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.keywordPart(134));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                writeTypeParametersOfSymbol(symbol, sourceFile);
+                displayParts.push(ts.spacePart());
+                displayParts.push(ts.operatorPart(56));
+                displayParts.push(ts.spacePart());
+                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, typeChecker.getDeclaredTypeOfSymbol(symbol), enclosingDeclaration));
+            }
+            if (symbolFlags & 384) {
+                addNewLineIfDisplayPartsExist();
+                if (ts.forEach(symbol.declarations, ts.isConstEnumDeclaration)) {
+                    displayParts.push(ts.keywordPart(74));
+                    displayParts.push(ts.spacePart());
+                }
+                displayParts.push(ts.keywordPart(81));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+            }
+            if (symbolFlags & 1536) {
+                addNewLineIfDisplayPartsExist();
+                var declaration = ts.getDeclarationOfKind(symbol, 225);
+                var isNamespace = declaration && declaration.name && declaration.name.kind === 69;
+                displayParts.push(ts.keywordPart(isNamespace ? 126 : 125));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+            }
+            if ((symbolFlags & 262144) && (semanticMeaning & 2)) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.punctuationPart(17));
+                displayParts.push(ts.textPart("type parameter"));
+                displayParts.push(ts.punctuationPart(18));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                displayParts.push(ts.spacePart());
+                displayParts.push(ts.keywordPart(90));
+                displayParts.push(ts.spacePart());
+                if (symbol.parent) {
+                    addFullSymbolName(symbol.parent, enclosingDeclaration);
+                    writeTypeParametersOfSymbol(symbol.parent, enclosingDeclaration);
+                }
+                else {
+                    var declaration = ts.getDeclarationOfKind(symbol, 141);
+                    ts.Debug.assert(declaration !== undefined);
+                    declaration = declaration.parent;
+                    if (declaration) {
+                        if (ts.isFunctionLikeKind(declaration.kind)) {
+                            var signature = typeChecker.getSignatureFromDeclaration(declaration);
+                            if (declaration.kind === 152) {
+                                displayParts.push(ts.keywordPart(92));
+                                displayParts.push(ts.spacePart());
+                            }
+                            else if (declaration.kind !== 151 && declaration.name) {
+                                addFullSymbolName(declaration.symbol);
+                            }
+                            ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, sourceFile, 32));
+                        }
+                        else {
+                            displayParts.push(ts.keywordPart(134));
+                            displayParts.push(ts.spacePart());
+                            addFullSymbolName(declaration.symbol);
+                            writeTypeParametersOfSymbol(declaration.symbol, sourceFile);
+                        }
+                    }
+                }
+            }
+            if (symbolFlags & 8) {
+                addPrefixForAnyFunctionOrVar(symbol, "enum member");
+                var declaration = symbol.declarations[0];
+                if (declaration.kind === 255) {
+                    var constantValue = typeChecker.getConstantValue(declaration);
+                    if (constantValue !== undefined) {
+                        displayParts.push(ts.spacePart());
+                        displayParts.push(ts.operatorPart(56));
+                        displayParts.push(ts.spacePart());
+                        displayParts.push(ts.displayPart(constantValue.toString(), SymbolDisplayPartKind.numericLiteral));
+                    }
+                }
+            }
+            if (symbolFlags & 8388608) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.keywordPart(89));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                ts.forEach(symbol.declarations, function (declaration) {
+                    if (declaration.kind === 229) {
+                        var importEqualsDeclaration = declaration;
+                        if (ts.isExternalModuleImportEqualsDeclaration(importEqualsDeclaration)) {
+                            displayParts.push(ts.spacePart());
+                            displayParts.push(ts.operatorPart(56));
+                            displayParts.push(ts.spacePart());
+                            displayParts.push(ts.keywordPart(129));
+                            displayParts.push(ts.punctuationPart(17));
+                            displayParts.push(ts.displayPart(ts.getTextOfNode(ts.getExternalModuleImportEqualsDeclarationExpression(importEqualsDeclaration)), SymbolDisplayPartKind.stringLiteral));
+                            displayParts.push(ts.punctuationPart(18));
+                        }
+                        else {
+                            var internalAliasSymbol = typeChecker.getSymbolAtLocation(importEqualsDeclaration.moduleReference);
+                            if (internalAliasSymbol) {
+                                displayParts.push(ts.spacePart());
+                                displayParts.push(ts.operatorPart(56));
+                                displayParts.push(ts.spacePart());
+                                addFullSymbolName(internalAliasSymbol, enclosingDeclaration);
+                            }
+                        }
+                        return true;
+                    }
+                });
+            }
+            if (!hasAddedSymbolInfo) {
+                if (symbolKind !== ScriptElementKind.unknown) {
+                    if (type) {
+                        if (isThisExpression) {
+                            addNewLineIfDisplayPartsExist();
+                            displayParts.push(ts.keywordPart(97));
+                        }
+                        else {
+                            addPrefixForAnyFunctionOrVar(symbol, symbolKind);
+                        }
+                        if (symbolKind === ScriptElementKind.memberVariableElement ||
+                            symbolFlags & 3 ||
+                            symbolKind === ScriptElementKind.localVariableElement ||
+                            isThisExpression) {
+                            displayParts.push(ts.punctuationPart(54));
+                            displayParts.push(ts.spacePart());
+                            if (type.symbol && type.symbol.flags & 262144) {
+                                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
+                                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(type, writer, enclosingDeclaration);
+                                });
+                                ts.addRange(displayParts, typeParameterParts);
+                            }
+                            else {
+                                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, type, enclosingDeclaration));
+                            }
+                        }
+                        else if (symbolFlags & 16 ||
+                            symbolFlags & 8192 ||
+                            symbolFlags & 16384 ||
+                            symbolFlags & 131072 ||
+                            symbolFlags & 98304 ||
+                            symbolKind === ScriptElementKind.memberFunctionElement) {
+                            var allSignatures = type.getNonNullableType().getCallSignatures();
+                            addSignatureDisplayParts(allSignatures[0], allSignatures);
+                        }
+                    }
+                }
+                else {
+                    symbolKind = getSymbolKind(symbol, location);
+                }
+            }
+            if (!documentation) {
+                documentation = symbol.getDocumentationComment();
+            }
+            return { displayParts: displayParts, documentation: documentation, symbolKind: symbolKind };
+            function addNewLineIfDisplayPartsExist() {
+                if (displayParts.length) {
+                    displayParts.push(ts.lineBreakPart());
+                }
+            }
+            function addFullSymbolName(symbol, enclosingDeclaration) {
+                var fullSymbolDisplayParts = ts.symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration || sourceFile, undefined, 1 | 2);
+                ts.addRange(displayParts, fullSymbolDisplayParts);
+            }
+            function addPrefixForAnyFunctionOrVar(symbol, symbolKind) {
+                addNewLineIfDisplayPartsExist();
+                if (symbolKind) {
+                    pushTypePart(symbolKind);
+                    displayParts.push(ts.spacePart());
+                    addFullSymbolName(symbol);
+                }
+            }
+            function pushTypePart(symbolKind) {
+                switch (symbolKind) {
+                    case ScriptElementKind.variableElement:
+                    case ScriptElementKind.functionElement:
+                    case ScriptElementKind.letElement:
+                    case ScriptElementKind.constElement:
+                    case ScriptElementKind.constructorImplementationElement:
+                        displayParts.push(ts.textOrKeywordPart(symbolKind));
+                        return;
+                    default:
+                        displayParts.push(ts.punctuationPart(17));
+                        displayParts.push(ts.textOrKeywordPart(symbolKind));
+                        displayParts.push(ts.punctuationPart(18));
+                        return;
+                }
+            }
+            function addSignatureDisplayParts(signature, allSignatures, flags) {
+                ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, enclosingDeclaration, flags | 32));
+                if (allSignatures.length > 1) {
+                    displayParts.push(ts.spacePart());
+                    displayParts.push(ts.punctuationPart(17));
+                    displayParts.push(ts.operatorPart(35));
+                    displayParts.push(ts.displayPart((allSignatures.length - 1).toString(), SymbolDisplayPartKind.numericLiteral));
+                    displayParts.push(ts.spacePart());
+                    displayParts.push(ts.textPart(allSignatures.length === 2 ? "overload" : "overloads"));
+                    displayParts.push(ts.punctuationPart(18));
+                }
+                documentation = signature.getDocumentationComment();
+            }
+            function writeTypeParametersOfSymbol(symbol, enclosingDeclaration) {
+                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
+                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration);
+                });
+                ts.addRange(displayParts, typeParameterParts);
+            }
+        }
+        function getQuickInfoAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, position);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            if (isLabelName(node)) {
+                return undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol || typeChecker.isUnknownSymbol(symbol)) {
+                switch (node.kind) {
+                    case 69:
+                    case 172:
+                    case 139:
+                    case 97:
+                    case 165:
+                    case 95:
+                        var type = typeChecker.getTypeAtLocation(node);
+                        if (type) {
+                            return {
+                                kind: ScriptElementKind.unknown,
+                                kindModifiers: ScriptElementKindModifier.none,
+                                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
+                                displayParts: ts.typeToDisplayParts(typeChecker, type, getContainerNode(node)),
+                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined
+                            };
+                        }
+                }
+                return undefined;
+            }
+            var displayPartsDocumentationsAndKind = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, getContainerNode(node), node);
+            return {
+                kind: displayPartsDocumentationsAndKind.symbolKind,
+                kindModifiers: getSymbolModifiers(symbol),
+                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
+                displayParts: displayPartsDocumentationsAndKind.displayParts,
+                documentation: displayPartsDocumentationsAndKind.documentation
+            };
+        }
+        function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
+            return {
+                fileName: node.getSourceFile().fileName,
+                textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
+                kind: symbolKind,
+                name: symbolName,
+                containerKind: undefined,
+                containerName: containerName
+            };
+        }
+        function getDefinitionFromSymbol(symbol, node) {
+            var typeChecker = program.getTypeChecker();
+            var result = [];
+            var declarations = symbol.getDeclarations();
+            var symbolName = typeChecker.symbolToString(symbol);
+            var symbolKind = getSymbolKind(symbol, node);
+            var containerSymbol = symbol.parent;
+            var containerName = containerSymbol ? typeChecker.symbolToString(containerSymbol, node) : "";
+            if (!tryAddConstructSignature(symbol, node, symbolKind, symbolName, containerName, result) &&
+                !tryAddCallSignature(symbol, node, symbolKind, symbolName, containerName, result)) {
+                ts.forEach(declarations, function (declaration) {
+                    result.push(createDefinitionInfo(declaration, symbolKind, symbolName, containerName));
+                });
+            }
+            return result;
+            function tryAddConstructSignature(symbol, location, symbolKind, symbolName, containerName, result) {
+                if (isNewExpressionTarget(location) || location.kind === 121) {
+                    if (symbol.flags & 32) {
+                        for (var _i = 0, _a = symbol.getDeclarations(); _i < _a.length; _i++) {
+                            var declaration = _a[_i];
+                            if (ts.isClassLike(declaration)) {
+                                return tryAddSignature(declaration.members, true, symbolKind, symbolName, containerName, result);
+                            }
+                        }
+                        ts.Debug.fail("Expected declaration to have at least one class-like declaration");
+                    }
+                }
+                return false;
+            }
+            function tryAddCallSignature(symbol, location, symbolKind, symbolName, containerName, result) {
+                if (isCallExpressionTarget(location) || isNewExpressionTarget(location) || isNameOfFunctionDeclaration(location)) {
+                    return tryAddSignature(symbol.declarations, false, symbolKind, symbolName, containerName, result);
+                }
+                return false;
+            }
+            function tryAddSignature(signatureDeclarations, selectConstructors, symbolKind, symbolName, containerName, result) {
+                var declarations = [];
+                var definition;
+                ts.forEach(signatureDeclarations, function (d) {
+                    if ((selectConstructors && d.kind === 148) ||
+                        (!selectConstructors && (d.kind === 220 || d.kind === 147 || d.kind === 146))) {
+                        declarations.push(d);
+                        if (d.body)
+                            definition = d;
+                    }
+                });
+                if (definition) {
+                    result.push(createDefinitionInfo(definition, symbolKind, symbolName, containerName));
+                    return true;
+                }
+                else if (declarations.length) {
+                    result.push(createDefinitionInfo(ts.lastOrUndefined(declarations), symbolKind, symbolName, containerName));
+                    return true;
+                }
+                return false;
+            }
+        }
+        function findReferenceInPosition(refs, pos) {
+            for (var _i = 0, refs_1 = refs; _i < refs_1.length; _i++) {
+                var ref = refs_1[_i];
+                if (ref.pos <= pos && pos < ref.end) {
+                    return ref;
+                }
+            }
+            return undefined;
+        }
+        function getDefinitionInfoForFileReference(name, targetFileName) {
+            return {
+                fileName: targetFileName,
+                textSpan: ts.createTextSpanFromBounds(0, 0),
+                kind: ScriptElementKind.scriptElement,
+                name: name,
+                containerName: undefined,
+                containerKind: undefined
+            };
+        }
+        function getDefinitionAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var comment = findReferenceInPosition(sourceFile.referencedFiles, position);
+            if (comment) {
+                var referenceFile = ts.tryResolveScriptReference(program, sourceFile, comment);
+                if (referenceFile) {
+                    return [getDefinitionInfoForFileReference(comment.fileName, referenceFile.fileName)];
+                }
+                return undefined;
+            }
+            var typeReferenceDirective = findReferenceInPosition(sourceFile.typeReferenceDirectives, position);
+            if (typeReferenceDirective) {
+                var referenceFile = ts.lookUp(program.getResolvedTypeReferenceDirectives(), typeReferenceDirective.fileName);
+                if (referenceFile && referenceFile.resolvedFileName) {
+                    return [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
+                }
+                return undefined;
+            }
+            var node = ts.getTouchingPropertyName(sourceFile, position);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            if (isJumpStatementTarget(node)) {
+                var labelName = node.text;
+                var label = getTargetLabel(node.parent, node.text);
+                return label ? [createDefinitionInfo(label, ScriptElementKind.label, labelName, undefined)] : undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol) {
+                return undefined;
+            }
+            if (symbol.flags & 8388608) {
+                var declaration = symbol.declarations[0];
+                if (node.kind === 69 &&
+                    (node.parent === declaration ||
+                        (declaration.kind === 234 && declaration.parent && declaration.parent.kind === 233))) {
+                    symbol = typeChecker.getAliasedSymbol(symbol);
+                }
+            }
+            if (node.parent.kind === 254) {
+                var shorthandSymbol = typeChecker.getShorthandAssignmentValueSymbol(symbol.valueDeclaration);
+                if (!shorthandSymbol) {
+                    return [];
+                }
+                var shorthandDeclarations = shorthandSymbol.getDeclarations();
+                var shorthandSymbolKind_1 = getSymbolKind(shorthandSymbol, node);
+                var shorthandSymbolName_1 = typeChecker.symbolToString(shorthandSymbol);
+                var shorthandContainerName_1 = typeChecker.symbolToString(symbol.parent, node);
+                return ts.map(shorthandDeclarations, function (declaration) { return createDefinitionInfo(declaration, shorthandSymbolKind_1, shorthandSymbolName_1, shorthandContainerName_1); });
+            }
+            return getDefinitionFromSymbol(symbol, node);
+        }
+        function getTypeDefinitionAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, position);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol) {
+                return undefined;
+            }
+            var type = typeChecker.getTypeOfSymbolAtLocation(symbol, node);
+            if (!type) {
+                return undefined;
+            }
+            if (type.flags & 16384) {
+                var result_3 = [];
+                ts.forEach(type.types, function (t) {
+                    if (t.symbol) {
+                        ts.addRange(result_3, getDefinitionFromSymbol(t.symbol, node));
+                    }
+                });
+                return result_3;
+            }
+            if (!type.symbol) {
+                return undefined;
+            }
+            return getDefinitionFromSymbol(type.symbol, node);
+        }
+        function getOccurrencesAtPosition(fileName, position) {
+            var results = getOccurrencesAtPositionCore(fileName, position);
+            if (results) {
+                var sourceFile_1 = getCanonicalFileName(ts.normalizeSlashes(fileName));
+                results = ts.filter(results, function (r) { return getCanonicalFileName(ts.normalizeSlashes(r.fileName)) === sourceFile_1; });
+            }
+            return results;
+        }
+        function getDocumentHighlights(fileName, position, filesToSearch) {
+            synchronizeHostData();
+            var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingWord(sourceFile, position);
+            if (!node) {
+                return undefined;
+            }
+            return getSemanticDocumentHighlights(node) || getSyntacticDocumentHighlights(node);
+            function getHighlightSpanForNode(node) {
+                var start = node.getStart();
+                var end = node.getEnd();
+                return {
+                    fileName: sourceFile.fileName,
+                    textSpan: ts.createTextSpanFromBounds(start, end),
+                    kind: HighlightSpanKind.none
+                };
+            }
+            function getSemanticDocumentHighlights(node) {
+                if (node.kind === 69 ||
+                    node.kind === 97 ||
+                    node.kind === 165 ||
+                    node.kind === 95 ||
+                    node.kind === 9 ||
+                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                    var referencedSymbols = getReferencedSymbolsForNode(node, sourceFilesToSearch, false, false);
+                    return convertReferencedSymbols(referencedSymbols);
+                }
+                return undefined;
+                function convertReferencedSymbols(referencedSymbols) {
+                    if (!referencedSymbols) {
+                        return undefined;
+                    }
+                    var fileNameToDocumentHighlights = {};
+                    var result = [];
+                    for (var _i = 0, referencedSymbols_1 = referencedSymbols; _i < referencedSymbols_1.length; _i++) {
+                        var referencedSymbol = referencedSymbols_1[_i];
+                        for (var _a = 0, _b = referencedSymbol.references; _a < _b.length; _a++) {
+                            var referenceEntry = _b[_a];
+                            var fileName_1 = referenceEntry.fileName;
+                            var documentHighlights = ts.getProperty(fileNameToDocumentHighlights, fileName_1);
+                            if (!documentHighlights) {
+                                documentHighlights = { fileName: fileName_1, highlightSpans: [] };
+                                fileNameToDocumentHighlights[fileName_1] = documentHighlights;
+                                result.push(documentHighlights);
+                            }
+                            documentHighlights.highlightSpans.push({
+                                textSpan: referenceEntry.textSpan,
+                                kind: referenceEntry.isWriteAccess ? HighlightSpanKind.writtenReference : HighlightSpanKind.reference
+                            });
+                        }
+                    }
+                    return result;
+                }
+            }
+            function getSyntacticDocumentHighlights(node) {
+                var fileName = sourceFile.fileName;
+                var highlightSpans = getHighlightSpans(node);
+                if (!highlightSpans || highlightSpans.length === 0) {
+                    return undefined;
+                }
+                return [{ fileName: fileName, highlightSpans: highlightSpans }];
+                function hasKind(node, kind) {
+                    return node !== undefined && node.kind === kind;
+                }
+                function parent(node) {
+                    return node && node.parent;
+                }
+                function getHighlightSpans(node) {
+                    if (node) {
+                        switch (node.kind) {
+                            case 88:
+                            case 80:
+                                if (hasKind(node.parent, 203)) {
+                                    return getIfElseOccurrences(node.parent);
+                                }
+                                break;
+                            case 94:
+                                if (hasKind(node.parent, 211)) {
+                                    return getReturnOccurrences(node.parent);
+                                }
+                                break;
+                            case 98:
+                                if (hasKind(node.parent, 215)) {
+                                    return getThrowOccurrences(node.parent);
+                                }
+                                break;
+                            case 72:
+                                if (hasKind(parent(parent(node)), 216)) {
+                                    return getTryCatchFinallyOccurrences(node.parent.parent);
+                                }
+                                break;
+                            case 100:
+                            case 85:
+                                if (hasKind(parent(node), 216)) {
+                                    return getTryCatchFinallyOccurrences(node.parent);
+                                }
+                                break;
+                            case 96:
+                                if (hasKind(node.parent, 213)) {
+                                    return getSwitchCaseDefaultOccurrences(node.parent);
+                                }
+                                break;
+                            case 71:
+                            case 77:
+                                if (hasKind(parent(parent(parent(node))), 213)) {
+                                    return getSwitchCaseDefaultOccurrences(node.parent.parent.parent);
+                                }
+                                break;
+                            case 70:
+                            case 75:
+                                if (hasKind(node.parent, 210) || hasKind(node.parent, 209)) {
+                                    return getBreakOrContinueStatementOccurrences(node.parent);
+                                }
+                                break;
+                            case 86:
+                                if (hasKind(node.parent, 206) ||
+                                    hasKind(node.parent, 207) ||
+                                    hasKind(node.parent, 208)) {
+                                    return getLoopBreakContinueOccurrences(node.parent);
+                                }
+                                break;
+                            case 104:
+                            case 79:
+                                if (hasKind(node.parent, 205) || hasKind(node.parent, 204)) {
+                                    return getLoopBreakContinueOccurrences(node.parent);
+                                }
+                                break;
+                            case 121:
+                                if (hasKind(node.parent, 148)) {
+                                    return getConstructorOccurrences(node.parent);
+                                }
+                                break;
+                            case 123:
+                            case 131:
+                                if (hasKind(node.parent, 149) || hasKind(node.parent, 150)) {
+                                    return getGetAndSetOccurrences(node.parent);
+                                }
+                                break;
+                            default:
+                                if (ts.isModifierKind(node.kind) && node.parent &&
+                                    (ts.isDeclaration(node.parent) || node.parent.kind === 200)) {
+                                    return getModifierOccurrences(node.kind, node.parent);
+                                }
+                        }
+                    }
+                    return undefined;
+                }
+                function aggregateOwnedThrowStatements(node) {
+                    var statementAccumulator = [];
+                    aggregate(node);
+                    return statementAccumulator;
+                    function aggregate(node) {
+                        if (node.kind === 215) {
+                            statementAccumulator.push(node);
+                        }
+                        else if (node.kind === 216) {
+                            var tryStatement = node;
+                            if (tryStatement.catchClause) {
+                                aggregate(tryStatement.catchClause);
+                            }
+                            else {
+                                aggregate(tryStatement.tryBlock);
+                            }
+                            if (tryStatement.finallyBlock) {
+                                aggregate(tryStatement.finallyBlock);
+                            }
+                        }
+                        else if (!ts.isFunctionLike(node)) {
+                            ts.forEachChild(node, aggregate);
+                        }
+                    }
+                }
+                function getThrowStatementOwner(throwStatement) {
+                    var child = throwStatement;
+                    while (child.parent) {
+                        var parent_19 = child.parent;
+                        if (ts.isFunctionBlock(parent_19) || parent_19.kind === 256) {
+                            return parent_19;
+                        }
+                        if (parent_19.kind === 216) {
+                            var tryStatement = parent_19;
+                            if (tryStatement.tryBlock === child && tryStatement.catchClause) {
+                                return child;
+                            }
+                        }
+                        child = parent_19;
+                    }
+                    return undefined;
+                }
+                function aggregateAllBreakAndContinueStatements(node) {
+                    var statementAccumulator = [];
+                    aggregate(node);
+                    return statementAccumulator;
+                    function aggregate(node) {
+                        if (node.kind === 210 || node.kind === 209) {
+                            statementAccumulator.push(node);
+                        }
+                        else if (!ts.isFunctionLike(node)) {
+                            ts.forEachChild(node, aggregate);
+                        }
+                    }
+                }
+                function ownsBreakOrContinueStatement(owner, statement) {
+                    var actualOwner = getBreakOrContinueOwner(statement);
+                    return actualOwner && actualOwner === owner;
+                }
+                function getBreakOrContinueOwner(statement) {
+                    for (var node_1 = statement.parent; node_1; node_1 = node_1.parent) {
+                        switch (node_1.kind) {
+                            case 213:
+                                if (statement.kind === 209) {
+                                    continue;
+                                }
+                            case 206:
+                            case 207:
+                            case 208:
+                            case 205:
+                            case 204:
+                                if (!statement.label || isLabeledBy(node_1, statement.label.text)) {
+                                    return node_1;
+                                }
+                                break;
+                            default:
+                                if (ts.isFunctionLike(node_1)) {
+                                    return undefined;
+                                }
+                                break;
+                        }
+                    }
+                    return undefined;
+                }
+                function getModifierOccurrences(modifier, declaration) {
+                    var container = declaration.parent;
+                    if (ts.isAccessibilityModifier(modifier)) {
+                        if (!(container.kind === 221 ||
+                            container.kind === 192 ||
+                            (declaration.kind === 142 && hasKind(container, 148)))) {
+                            return undefined;
+                        }
+                    }
+                    else if (modifier === 113) {
+                        if (!(container.kind === 221 || container.kind === 192)) {
+                            return undefined;
+                        }
+                    }
+                    else if (modifier === 82 || modifier === 122) {
+                        if (!(container.kind === 226 || container.kind === 256)) {
+                            return undefined;
+                        }
+                    }
+                    else if (modifier === 115) {
+                        if (!(container.kind === 221 || declaration.kind === 221)) {
+                            return undefined;
+                        }
+                    }
+                    else {
+                        return undefined;
+                    }
+                    var keywords = [];
+                    var modifierFlag = getFlagFromModifier(modifier);
+                    var nodes;
+                    switch (container.kind) {
+                        case 226:
+                        case 256:
+                            if (modifierFlag & 128) {
+                                nodes = declaration.members.concat(declaration);
+                            }
+                            else {
+                                nodes = container.statements;
+                            }
+                            break;
+                        case 148:
+                            nodes = container.parameters.concat(container.parent.members);
+                            break;
+                        case 221:
+                        case 192:
+                            nodes = container.members;
+                            if (modifierFlag & 28) {
+                                var constructor = ts.forEach(container.members, function (member) {
+                                    return member.kind === 148 && member;
+                                });
+                                if (constructor) {
+                                    nodes = nodes.concat(constructor.parameters);
+                                }
+                            }
+                            else if (modifierFlag & 128) {
+                                nodes = nodes.concat(container);
+                            }
+                            break;
+                        default:
+                            ts.Debug.fail("Invalid container kind.");
+                    }
+                    ts.forEach(nodes, function (node) {
+                        if (node.modifiers && node.flags & modifierFlag) {
+                            ts.forEach(node.modifiers, function (child) { return pushKeywordIf(keywords, child, modifier); });
+                        }
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                    function getFlagFromModifier(modifier) {
+                        switch (modifier) {
+                            case 112:
+                                return 4;
+                            case 110:
+                                return 8;
+                            case 111:
+                                return 16;
+                            case 113:
+                                return 32;
+                            case 82:
+                                return 1;
+                            case 122:
+                                return 2;
+                            case 115:
+                                return 128;
+                            default:
+                                ts.Debug.fail();
+                        }
+                    }
+                }
+                function pushKeywordIf(keywordList, token) {
+                    var expected = [];
+                    for (var _i = 2; _i < arguments.length; _i++) {
+                        expected[_i - 2] = arguments[_i];
+                    }
+                    if (token && ts.contains(expected, token.kind)) {
+                        keywordList.push(token);
+                        return true;
+                    }
+                    return false;
+                }
+                function getGetAndSetOccurrences(accessorDeclaration) {
+                    var keywords = [];
+                    tryPushAccessorKeyword(accessorDeclaration.symbol, 149);
+                    tryPushAccessorKeyword(accessorDeclaration.symbol, 150);
+                    return ts.map(keywords, getHighlightSpanForNode);
+                    function tryPushAccessorKeyword(accessorSymbol, accessorKind) {
+                        var accessor = ts.getDeclarationOfKind(accessorSymbol, accessorKind);
+                        if (accessor) {
+                            ts.forEach(accessor.getChildren(), function (child) { return pushKeywordIf(keywords, child, 123, 131); });
+                        }
+                    }
+                }
+                function getConstructorOccurrences(constructorDeclaration) {
+                    var declarations = constructorDeclaration.symbol.getDeclarations();
+                    var keywords = [];
+                    ts.forEach(declarations, function (declaration) {
+                        ts.forEach(declaration.getChildren(), function (token) {
+                            return pushKeywordIf(keywords, token, 121);
+                        });
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getLoopBreakContinueOccurrences(loopNode) {
+                    var keywords = [];
+                    if (pushKeywordIf(keywords, loopNode.getFirstToken(), 86, 104, 79)) {
+                        if (loopNode.kind === 204) {
+                            var loopTokens = loopNode.getChildren();
+                            for (var i = loopTokens.length - 1; i >= 0; i--) {
+                                if (pushKeywordIf(keywords, loopTokens[i], 104)) {
+                                    break;
+                                }
+                            }
+                        }
+                    }
+                    var breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
+                    ts.forEach(breaksAndContinues, function (statement) {
+                        if (ownsBreakOrContinueStatement(loopNode, statement)) {
+                            pushKeywordIf(keywords, statement.getFirstToken(), 70, 75);
+                        }
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getBreakOrContinueStatementOccurrences(breakOrContinueStatement) {
+                    var owner = getBreakOrContinueOwner(breakOrContinueStatement);
+                    if (owner) {
+                        switch (owner.kind) {
+                            case 206:
+                            case 207:
+                            case 208:
+                            case 204:
+                            case 205:
+                                return getLoopBreakContinueOccurrences(owner);
+                            case 213:
+                                return getSwitchCaseDefaultOccurrences(owner);
+                        }
+                    }
+                    return undefined;
+                }
+                function getSwitchCaseDefaultOccurrences(switchStatement) {
+                    var keywords = [];
+                    pushKeywordIf(keywords, switchStatement.getFirstToken(), 96);
+                    ts.forEach(switchStatement.caseBlock.clauses, function (clause) {
+                        pushKeywordIf(keywords, clause.getFirstToken(), 71, 77);
+                        var breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
+                        ts.forEach(breaksAndContinues, function (statement) {
+                            if (ownsBreakOrContinueStatement(switchStatement, statement)) {
+                                pushKeywordIf(keywords, statement.getFirstToken(), 70);
+                            }
+                        });
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getTryCatchFinallyOccurrences(tryStatement) {
+                    var keywords = [];
+                    pushKeywordIf(keywords, tryStatement.getFirstToken(), 100);
+                    if (tryStatement.catchClause) {
+                        pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), 72);
+                    }
+                    if (tryStatement.finallyBlock) {
+                        var finallyKeyword = ts.findChildOfKind(tryStatement, 85, sourceFile);
+                        pushKeywordIf(keywords, finallyKeyword, 85);
+                    }
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getThrowOccurrences(throwStatement) {
+                    var owner = getThrowStatementOwner(throwStatement);
+                    if (!owner) {
+                        return undefined;
+                    }
+                    var keywords = [];
+                    ts.forEach(aggregateOwnedThrowStatements(owner), function (throwStatement) {
+                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98);
+                    });
+                    if (ts.isFunctionBlock(owner)) {
+                        ts.forEachReturnStatement(owner, function (returnStatement) {
+                            pushKeywordIf(keywords, returnStatement.getFirstToken(), 94);
+                        });
+                    }
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getReturnOccurrences(returnStatement) {
+                    var func = ts.getContainingFunction(returnStatement);
+                    if (!(func && hasKind(func.body, 199))) {
+                        return undefined;
+                    }
+                    var keywords = [];
+                    ts.forEachReturnStatement(func.body, function (returnStatement) {
+                        pushKeywordIf(keywords, returnStatement.getFirstToken(), 94);
+                    });
+                    ts.forEach(aggregateOwnedThrowStatements(func.body), function (throwStatement) {
+                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98);
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getIfElseOccurrences(ifStatement) {
+                    var keywords = [];
+                    while (hasKind(ifStatement.parent, 203) && ifStatement.parent.elseStatement === ifStatement) {
+                        ifStatement = ifStatement.parent;
+                    }
+                    while (ifStatement) {
+                        var children = ifStatement.getChildren();
+                        pushKeywordIf(keywords, children[0], 88);
+                        for (var i = children.length - 1; i >= 0; i--) {
+                            if (pushKeywordIf(keywords, children[i], 80)) {
+                                break;
+                            }
+                        }
+                        if (!hasKind(ifStatement.elseStatement, 203)) {
+                            break;
+                        }
+                        ifStatement = ifStatement.elseStatement;
+                    }
+                    var result = [];
+                    for (var i = 0; i < keywords.length; i++) {
+                        if (keywords[i].kind === 80 && i < keywords.length - 1) {
+                            var elseKeyword = keywords[i];
+                            var ifKeyword = keywords[i + 1];
+                            var shouldCombindElseAndIf = true;
+                            for (var j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
+                                if (!ts.isWhiteSpace(sourceFile.text.charCodeAt(j))) {
+                                    shouldCombindElseAndIf = false;
+                                    break;
+                                }
+                            }
+                            if (shouldCombindElseAndIf) {
+                                result.push({
+                                    fileName: fileName,
+                                    textSpan: ts.createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
+                                    kind: HighlightSpanKind.reference
+                                });
+                                i++;
+                                continue;
+                            }
+                        }
+                        result.push(getHighlightSpanForNode(keywords[i]));
+                    }
+                    return result;
+                }
+            }
+        }
+        function getOccurrencesAtPositionCore(fileName, position) {
+            synchronizeHostData();
+            return convertDocumentHighlights(getDocumentHighlights(fileName, position, [fileName]));
+            function convertDocumentHighlights(documentHighlights) {
+                if (!documentHighlights) {
+                    return undefined;
+                }
+                var result = [];
+                for (var _i = 0, documentHighlights_1 = documentHighlights; _i < documentHighlights_1.length; _i++) {
+                    var entry = documentHighlights_1[_i];
+                    for (var _a = 0, _b = entry.highlightSpans; _a < _b.length; _a++) {
+                        var highlightSpan = _b[_a];
+                        result.push({
+                            fileName: entry.fileName,
+                            textSpan: highlightSpan.textSpan,
+                            isWriteAccess: highlightSpan.kind === HighlightSpanKind.writtenReference
+                        });
+                    }
+                }
+                return result;
+            }
+        }
+        function convertReferences(referenceSymbols) {
+            if (!referenceSymbols) {
+                return undefined;
+            }
+            var referenceEntries = [];
+            for (var _i = 0, referenceSymbols_1 = referenceSymbols; _i < referenceSymbols_1.length; _i++) {
+                var referenceSymbol = referenceSymbols_1[_i];
+                ts.addRange(referenceEntries, referenceSymbol.references);
+            }
+            return referenceEntries;
+        }
+        function findRenameLocations(fileName, position, findInStrings, findInComments) {
+            var referencedSymbols = findReferencedSymbols(fileName, position, findInStrings, findInComments);
+            return convertReferences(referencedSymbols);
+        }
+        function getReferencesAtPosition(fileName, position) {
+            var referencedSymbols = findReferencedSymbols(fileName, position, false, false);
+            return convertReferences(referencedSymbols);
+        }
+        function findReferences(fileName, position) {
+            var referencedSymbols = findReferencedSymbols(fileName, position, false, false);
+            return ts.filter(referencedSymbols, function (rs) { return !!rs.definition; });
+        }
+        function findReferencedSymbols(fileName, position, findInStrings, findInComments) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, position, true);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            if (node.kind !== 69 &&
+                node.kind !== 9 &&
+                !isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                return undefined;
+            }
+            ts.Debug.assert(node.kind === 69 || node.kind === 8 || node.kind === 9);
+            return getReferencedSymbolsForNode(node, program.getSourceFiles(), findInStrings, findInComments);
+        }
+        function getReferencedSymbolsForNode(node, sourceFiles, findInStrings, findInComments) {
+            var typeChecker = program.getTypeChecker();
+            if (isLabelName(node)) {
+                if (isJumpStatementTarget(node)) {
+                    var labelDefinition = getTargetLabel(node.parent, node.text);
+                    return labelDefinition ? getLabelReferencesInNode(labelDefinition.parent, labelDefinition) : undefined;
+                }
+                else {
+                    return getLabelReferencesInNode(node.parent, node);
+                }
+            }
+            if (node.kind === 97 || node.kind === 165) {
+                return getReferencesForThisKeyword(node, sourceFiles);
+            }
+            if (node.kind === 95) {
+                return getReferencesForSuperKeyword(node);
+            }
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol && node.kind === 9) {
+                return getReferencesForStringLiteral(node, sourceFiles);
+            }
+            if (!symbol) {
+                return undefined;
+            }
+            var declarations = symbol.declarations;
+            if (!declarations || !declarations.length) {
+                return undefined;
+            }
+            var result;
+            var searchMeaning = getIntersectingMeaningFromDeclarations(getMeaningFromLocation(node), declarations);
+            var declaredName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
+            var scope = getSymbolScope(symbol);
+            var symbolToIndex = [];
+            if (scope) {
+                result = [];
+                getReferencesInNode(scope, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
+            }
+            else {
+                var internedName = getInternedName(symbol, node, declarations);
+                for (var _i = 0, sourceFiles_4 = sourceFiles; _i < sourceFiles_4.length; _i++) {
+                    var sourceFile = sourceFiles_4[_i];
+                    cancellationToken.throwIfCancellationRequested();
+                    var nameTable = getNameTable(sourceFile);
+                    if (ts.lookUp(nameTable, internedName) !== undefined) {
+                        result = result || [];
+                        getReferencesInNode(sourceFile, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
+                    }
+                }
+            }
+            return result;
+            function getDefinition(symbol) {
+                var info = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, node.getSourceFile(), getContainerNode(node), node);
+                var name = ts.map(info.displayParts, function (p) { return p.text; }).join("");
+                var declarations = symbol.declarations;
+                if (!declarations || declarations.length === 0) {
+                    return undefined;
+                }
+                return {
+                    containerKind: "",
+                    containerName: "",
+                    name: name,
+                    kind: info.symbolKind,
+                    fileName: declarations[0].getSourceFile().fileName,
+                    textSpan: ts.createTextSpan(declarations[0].getStart(), 0)
+                };
+            }
+            function getAliasSymbolForPropertyNameSymbol(symbol, location) {
+                if (symbol.flags & 8388608) {
+                    var defaultImport = ts.getDeclarationOfKind(symbol, 231);
+                    if (defaultImport) {
+                        return typeChecker.getAliasedSymbol(symbol);
+                    }
+                    var importOrExportSpecifier = ts.forEach(symbol.declarations, function (declaration) { return (declaration.kind === 234 ||
+                        declaration.kind === 238) ? declaration : undefined; });
+                    if (importOrExportSpecifier &&
+                        (!importOrExportSpecifier.propertyName ||
+                            importOrExportSpecifier.propertyName === location)) {
+                        return importOrExportSpecifier.kind === 234 ?
+                            typeChecker.getAliasedSymbol(symbol) :
+                            typeChecker.getExportSpecifierLocalTargetSymbol(importOrExportSpecifier);
+                    }
+                }
+                return undefined;
+            }
+            function getPropertySymbolOfDestructuringAssignment(location) {
+                return ts.isArrayLiteralOrObjectLiteralDestructuringPattern(location.parent.parent) &&
+                    typeChecker.getPropertySymbolOfDestructuringAssignment(location);
+            }
+            function isObjectBindingPatternElementWithoutPropertyName(symbol) {
+                var bindingElement = ts.getDeclarationOfKind(symbol, 169);
+                return bindingElement &&
+                    bindingElement.parent.kind === 167 &&
+                    !bindingElement.propertyName;
+            }
+            function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol) {
+                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
+                    var bindingElement = ts.getDeclarationOfKind(symbol, 169);
+                    var typeOfPattern = typeChecker.getTypeAtLocation(bindingElement.parent);
+                    return typeOfPattern && typeChecker.getPropertyOfType(typeOfPattern, bindingElement.name.text);
+                }
+                return undefined;
+            }
+            function getInternedName(symbol, location, declarations) {
+                if (ts.isImportOrExportSpecifierName(location)) {
+                    return location.getText();
+                }
+                var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
+                symbol = localExportDefaultSymbol || symbol;
+                return ts.stripQuotes(symbol.name);
+            }
+            function getSymbolScope(symbol) {
+                var valueDeclaration = symbol.valueDeclaration;
+                if (valueDeclaration && (valueDeclaration.kind === 179 || valueDeclaration.kind === 192)) {
+                    return valueDeclaration;
+                }
+                if (symbol.flags & (4 | 8192)) {
+                    var privateDeclaration = ts.forEach(symbol.getDeclarations(), function (d) { return (d.flags & 8) ? d : undefined; });
+                    if (privateDeclaration) {
+                        return ts.getAncestor(privateDeclaration, 221);
+                    }
+                }
+                if (symbol.flags & 8388608) {
+                    return undefined;
+                }
+                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
+                    return undefined;
+                }
+                if (symbol.parent || (symbol.flags & 268435456)) {
+                    return undefined;
+                }
+                var scope;
+                var declarations = symbol.getDeclarations();
+                if (declarations) {
+                    for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
+                        var declaration = declarations_9[_i];
+                        var container = getContainerNode(declaration);
+                        if (!container) {
+                            return undefined;
+                        }
+                        if (scope && scope !== container) {
+                            return undefined;
+                        }
+                        if (container.kind === 256 && !ts.isExternalModule(container)) {
+                            return undefined;
+                        }
+                        scope = container;
+                    }
+                }
+                return scope;
+            }
+            function getPossibleSymbolReferencePositions(sourceFile, symbolName, start, end) {
+                var positions = [];
+                if (!symbolName || !symbolName.length) {
+                    return positions;
+                }
+                var text = sourceFile.text;
+                var sourceLength = text.length;
+                var symbolNameLength = symbolName.length;
+                var position = text.indexOf(symbolName, start);
+                while (position >= 0) {
+                    cancellationToken.throwIfCancellationRequested();
+                    if (position > end)
+                        break;
+                    var endPosition = position + symbolNameLength;
+                    if ((position === 0 || !ts.isIdentifierPart(text.charCodeAt(position - 1), 2)) &&
+                        (endPosition === sourceLength || !ts.isIdentifierPart(text.charCodeAt(endPosition), 2))) {
+                        positions.push(position);
+                    }
+                    position = text.indexOf(symbolName, position + symbolNameLength + 1);
+                }
+                return positions;
+            }
+            function getLabelReferencesInNode(container, targetLabel) {
+                var references = [];
+                var sourceFile = container.getSourceFile();
+                var labelName = targetLabel.text;
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container.getStart(), container.getEnd());
+                ts.forEach(possiblePositions, function (position) {
+                    cancellationToken.throwIfCancellationRequested();
+                    var node = ts.getTouchingWord(sourceFile, position);
+                    if (!node || node.getWidth() !== labelName.length) {
+                        return;
+                    }
+                    if (node === targetLabel ||
+                        (isJumpStatementTarget(node) && getTargetLabel(node, labelName) === targetLabel)) {
+                        references.push(getReferenceEntryFromNode(node));
+                    }
+                });
+                var definition = {
+                    containerKind: "",
+                    containerName: "",
+                    fileName: targetLabel.getSourceFile().fileName,
+                    kind: ScriptElementKind.label,
+                    name: labelName,
+                    textSpan: ts.createTextSpanFromBounds(targetLabel.getStart(), targetLabel.getEnd())
+                };
+                return [{ definition: definition, references: references }];
+            }
+            function isValidReferencePosition(node, searchSymbolName) {
+                if (node) {
+                    switch (node.kind) {
+                        case 69:
+                            return node.getWidth() === searchSymbolName.length;
+                        case 9:
+                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
+                                isNameOfExternalModuleImportOrDeclaration(node)) {
+                                return node.getWidth() === searchSymbolName.length + 2;
+                            }
+                            break;
+                        case 8:
+                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                                return node.getWidth() === searchSymbolName.length;
+                            }
+                            break;
+                    }
+                }
+                return false;
+            }
+            function getReferencesInNode(container, searchSymbol, searchText, searchLocation, searchMeaning, findInStrings, findInComments, result, symbolToIndex) {
+                var sourceFile = container.getSourceFile();
+                var tripleSlashDirectivePrefixRegex = /^\/\/\/\s*</;
+                var start = findInComments ? container.getFullStart() : container.getStart();
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, start, container.getEnd());
+                if (possiblePositions.length) {
+                    var searchSymbols_1 = populateSearchSymbolSet(searchSymbol, searchLocation);
+                    ts.forEach(possiblePositions, function (position) {
+                        cancellationToken.throwIfCancellationRequested();
+                        var referenceLocation = ts.getTouchingPropertyName(sourceFile, position);
+                        if (!isValidReferencePosition(referenceLocation, searchText)) {
+                            if ((findInStrings && ts.isInString(sourceFile, position)) ||
+                                (findInComments && isInNonReferenceComment(sourceFile, position))) {
+                                result.push({
+                                    definition: undefined,
+                                    references: [{
+                                            fileName: sourceFile.fileName,
+                                            textSpan: ts.createTextSpan(position, searchText.length),
+                                            isWriteAccess: false
+                                        }]
+                                });
+                            }
+                            return;
+                        }
+                        if (!(getMeaningFromLocation(referenceLocation) & searchMeaning)) {
+                            return;
+                        }
+                        var referenceSymbol = typeChecker.getSymbolAtLocation(referenceLocation);
+                        if (referenceSymbol) {
+                            var referenceSymbolDeclaration = referenceSymbol.valueDeclaration;
+                            var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(referenceSymbolDeclaration);
+                            var relatedSymbol = getRelatedSymbol(searchSymbols_1, referenceSymbol, referenceLocation);
+                            if (relatedSymbol) {
+                                var referencedSymbol = getReferencedSymbol(relatedSymbol);
+                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceLocation));
+                            }
+                            else if (!(referenceSymbol.flags & 67108864) && searchSymbols_1.indexOf(shorthandValueSymbol) >= 0) {
+                                var referencedSymbol = getReferencedSymbol(shorthandValueSymbol);
+                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceSymbolDeclaration.name));
+                            }
+                        }
+                    });
+                }
+                return;
+                function getReferencedSymbol(symbol) {
+                    var symbolId = ts.getSymbolId(symbol);
+                    var index = symbolToIndex[symbolId];
+                    if (index === undefined) {
+                        index = result.length;
+                        symbolToIndex[symbolId] = index;
+                        result.push({
+                            definition: getDefinition(symbol),
+                            references: []
+                        });
+                    }
+                    return result[index];
+                }
+                function isInNonReferenceComment(sourceFile, position) {
+                    return ts.isInCommentHelper(sourceFile, position, isNonReferenceComment);
+                    function isNonReferenceComment(c) {
+                        var commentText = sourceFile.text.substring(c.pos, c.end);
+                        return !tripleSlashDirectivePrefixRegex.test(commentText);
+                    }
+                }
+            }
+            function getReferencesForSuperKeyword(superKeyword) {
+                var searchSpaceNode = ts.getSuperContainer(superKeyword, false);
+                if (!searchSpaceNode) {
+                    return undefined;
+                }
+                var staticFlag = 32;
+                switch (searchSpaceNode.kind) {
+                    case 145:
+                    case 144:
+                    case 147:
+                    case 146:
+                    case 148:
+                    case 149:
+                    case 150:
+                        staticFlag &= searchSpaceNode.flags;
+                        searchSpaceNode = searchSpaceNode.parent;
+                        break;
+                    default:
+                        return undefined;
+                }
+                var references = [];
+                var sourceFile = searchSpaceNode.getSourceFile();
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
+                ts.forEach(possiblePositions, function (position) {
+                    cancellationToken.throwIfCancellationRequested();
+                    var node = ts.getTouchingWord(sourceFile, position);
+                    if (!node || node.kind !== 95) {
+                        return;
+                    }
+                    var container = ts.getSuperContainer(node, false);
+                    if (container && (32 & container.flags) === staticFlag && container.parent.symbol === searchSpaceNode.symbol) {
+                        references.push(getReferenceEntryFromNode(node));
+                    }
+                });
+                var definition = getDefinition(searchSpaceNode.symbol);
+                return [{ definition: definition, references: references }];
+            }
+            function getReferencesForThisKeyword(thisOrSuperKeyword, sourceFiles) {
+                var searchSpaceNode = ts.getThisContainer(thisOrSuperKeyword, false);
+                var staticFlag = 32;
+                switch (searchSpaceNode.kind) {
+                    case 147:
+                    case 146:
+                        if (ts.isObjectLiteralMethod(searchSpaceNode)) {
+                            break;
+                        }
+                    case 145:
+                    case 144:
+                    case 148:
+                    case 149:
+                    case 150:
+                        staticFlag &= searchSpaceNode.flags;
+                        searchSpaceNode = searchSpaceNode.parent;
+                        break;
+                    case 256:
+                        if (ts.isExternalModule(searchSpaceNode)) {
+                            return undefined;
+                        }
+                    case 220:
+                    case 179:
+                        break;
+                    default:
+                        return undefined;
+                }
+                var references = [];
+                var possiblePositions;
+                if (searchSpaceNode.kind === 256) {
+                    ts.forEach(sourceFiles, function (sourceFile) {
+                        possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", sourceFile.getStart(), sourceFile.getEnd());
+                        getThisReferencesInFile(sourceFile, sourceFile, possiblePositions, references);
+                    });
+                }
+                else {
+                    var sourceFile = searchSpaceNode.getSourceFile();
+                    possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
+                    getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, references);
+                }
+                return [{
+                        definition: {
+                            containerKind: "",
+                            containerName: "",
+                            fileName: node.getSourceFile().fileName,
+                            kind: ScriptElementKind.variableElement,
+                            name: "this",
+                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
+                        },
+                        references: references
+                    }];
+                function getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, result) {
+                    ts.forEach(possiblePositions, function (position) {
+                        cancellationToken.throwIfCancellationRequested();
+                        var node = ts.getTouchingWord(sourceFile, position);
+                        if (!node || (node.kind !== 97 && node.kind !== 165)) {
+                            return;
+                        }
+                        var container = ts.getThisContainer(node, false);
+                        switch (searchSpaceNode.kind) {
+                            case 179:
+                            case 220:
+                                if (searchSpaceNode.symbol === container.symbol) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                            case 147:
+                            case 146:
+                                if (ts.isObjectLiteralMethod(searchSpaceNode) && searchSpaceNode.symbol === container.symbol) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                            case 192:
+                            case 221:
+                                if (container.parent && searchSpaceNode.symbol === container.parent.symbol && (container.flags & 32) === staticFlag) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                            case 256:
+                                if (container.kind === 256 && !ts.isExternalModule(container)) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                        }
+                    });
+                }
+            }
+            function getReferencesForStringLiteral(node, sourceFiles) {
+                var typeChecker = program.getTypeChecker();
+                var type = getStringLiteralTypeForNode(node, typeChecker);
+                if (!type) {
+                    return undefined;
+                }
+                var references = [];
+                for (var _i = 0, sourceFiles_5 = sourceFiles; _i < sourceFiles_5.length; _i++) {
+                    var sourceFile = sourceFiles_5[_i];
+                    var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, type.text, sourceFile.getStart(), sourceFile.getEnd());
+                    getReferencesForStringLiteralInFile(sourceFile, type, possiblePositions, references);
+                }
+                return [{
+                        definition: {
+                            containerKind: "",
+                            containerName: "",
+                            fileName: node.getSourceFile().fileName,
+                            kind: ScriptElementKind.variableElement,
+                            name: type.text,
+                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
+                        },
+                        references: references
+                    }];
+                function getReferencesForStringLiteralInFile(sourceFile, searchType, possiblePositions, references) {
+                    for (var _i = 0, possiblePositions_1 = possiblePositions; _i < possiblePositions_1.length; _i++) {
+                        var position = possiblePositions_1[_i];
+                        cancellationToken.throwIfCancellationRequested();
+                        var node_2 = ts.getTouchingWord(sourceFile, position);
+                        if (!node_2 || node_2.kind !== 9) {
+                            return;
+                        }
+                        var type_1 = getStringLiteralTypeForNode(node_2, typeChecker);
+                        if (type_1 === searchType) {
+                            references.push(getReferenceEntryFromNode(node_2));
+                        }
+                    }
+                }
+            }
+            function populateSearchSymbolSet(symbol, location) {
+                var result = [symbol];
+                var containingObjectLiteralElement = getContainingObjectLiteralElement(location);
+                if (containingObjectLiteralElement && containingObjectLiteralElement.kind !== 254) {
+                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(location);
+                    if (propertySymbol) {
+                        result.push(propertySymbol);
+                    }
+                }
+                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(symbol, location);
+                if (aliasSymbol) {
+                    result = result.concat(populateSearchSymbolSet(aliasSymbol, location));
+                }
+                if (containingObjectLiteralElement) {
+                    ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
+                        ts.addRange(result, typeChecker.getRootSymbols(contextualSymbol));
+                    });
+                    var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(location.parent);
+                    if (shorthandValueSymbol) {
+                        result.push(shorthandValueSymbol);
+                    }
+                }
+                if (symbol.valueDeclaration && symbol.valueDeclaration.kind === 142 &&
+                    ts.isParameterPropertyDeclaration(symbol.valueDeclaration)) {
+                    result = result.concat(typeChecker.getSymbolsOfParameterPropertyDeclaration(symbol.valueDeclaration, symbol.name));
+                }
+                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol);
+                if (bindingElementPropertySymbol) {
+                    result.push(bindingElementPropertySymbol);
+                }
+                ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
+                    if (rootSymbol !== symbol) {
+                        result.push(rootSymbol);
+                    }
+                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 | 64)) {
+                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, {});
+                    }
+                });
+                return result;
+            }
+            function getPropertySymbolsFromBaseTypes(symbol, propertyName, result, previousIterationSymbolsCache) {
+                if (!symbol) {
+                    return;
+                }
+                if (ts.hasProperty(previousIterationSymbolsCache, symbol.name)) {
+                    return;
+                }
+                if (symbol.flags & (32 | 64)) {
+                    ts.forEach(symbol.getDeclarations(), function (declaration) {
+                        if (ts.isClassLike(declaration)) {
+                            getPropertySymbolFromTypeReference(ts.getClassExtendsHeritageClauseElement(declaration));
+                            ts.forEach(ts.getClassImplementsHeritageClauseElements(declaration), getPropertySymbolFromTypeReference);
+                        }
+                        else if (declaration.kind === 222) {
+                            ts.forEach(ts.getInterfaceBaseTypeNodes(declaration), getPropertySymbolFromTypeReference);
+                        }
+                    });
+                }
+                return;
+                function getPropertySymbolFromTypeReference(typeReference) {
+                    if (typeReference) {
+                        var type = typeChecker.getTypeAtLocation(typeReference);
+                        if (type) {
+                            var propertySymbol = typeChecker.getPropertyOfType(type, propertyName);
+                            if (propertySymbol) {
+                                result.push.apply(result, typeChecker.getRootSymbols(propertySymbol));
+                            }
+                            previousIterationSymbolsCache[symbol.name] = symbol;
+                            getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache);
+                        }
+                    }
+                }
+            }
+            function getRelatedSymbol(searchSymbols, referenceSymbol, referenceLocation) {
+                if (searchSymbols.indexOf(referenceSymbol) >= 0) {
+                    return referenceSymbol;
+                }
+                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(referenceSymbol, referenceLocation);
+                if (aliasSymbol) {
+                    return getRelatedSymbol(searchSymbols, aliasSymbol, referenceLocation);
+                }
+                var containingObjectLiteralElement = getContainingObjectLiteralElement(referenceLocation);
+                if (containingObjectLiteralElement) {
+                    var contextualSymbol = ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
+                        return ts.forEach(typeChecker.getRootSymbols(contextualSymbol), function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
+                    });
+                    if (contextualSymbol) {
+                        return contextualSymbol;
+                    }
+                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation);
+                    if (propertySymbol && searchSymbols.indexOf(propertySymbol) >= 0) {
+                        return propertySymbol;
+                    }
+                }
+                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol);
+                if (bindingElementPropertySymbol && searchSymbols.indexOf(bindingElementPropertySymbol) >= 0) {
+                    return bindingElementPropertySymbol;
+                }
+                return ts.forEach(typeChecker.getRootSymbols(referenceSymbol), function (rootSymbol) {
+                    if (searchSymbols.indexOf(rootSymbol) >= 0) {
+                        return rootSymbol;
+                    }
+                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 | 64)) {
+                        var result_4 = [];
+                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result_4, {});
+                        return ts.forEach(result_4, function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
+                    }
+                    return undefined;
+                });
+            }
+            function getNameFromObjectLiteralElement(node) {
+                if (node.name.kind === 140) {
+                    var nameExpression = node.name.expression;
+                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
+                        return nameExpression.text;
+                    }
+                    return undefined;
+                }
+                return node.name.text;
+            }
+            function getPropertySymbolsFromContextualType(node) {
+                var objectLiteral = node.parent;
+                var contextualType = typeChecker.getContextualType(objectLiteral);
+                var name = getNameFromObjectLiteralElement(node);
+                if (name && contextualType) {
+                    var result_5 = [];
+                    var symbol_1 = contextualType.getProperty(name);
+                    if (symbol_1) {
+                        result_5.push(symbol_1);
+                    }
+                    if (contextualType.flags & 16384) {
+                        ts.forEach(contextualType.types, function (t) {
+                            var symbol = t.getProperty(name);
+                            if (symbol) {
+                                result_5.push(symbol);
+                            }
+                        });
+                    }
+                    return result_5;
+                }
+                return undefined;
+            }
+            function getIntersectingMeaningFromDeclarations(meaning, declarations) {
+                if (declarations) {
+                    var lastIterationMeaning = void 0;
+                    do {
+                        lastIterationMeaning = meaning;
+                        for (var _i = 0, declarations_10 = declarations; _i < declarations_10.length; _i++) {
+                            var declaration = declarations_10[_i];
+                            var declarationMeaning = getMeaningFromDeclaration(declaration);
+                            if (declarationMeaning & meaning) {
+                                meaning |= declarationMeaning;
+                            }
+                        }
+                    } while (meaning !== lastIterationMeaning);
+                }
+                return meaning;
+            }
+        }
+        function getReferenceEntryFromNode(node) {
+            var start = node.getStart();
+            var end = node.getEnd();
+            if (node.kind === 9) {
+                start += 1;
+                end -= 1;
+            }
+            return {
+                fileName: node.getSourceFile().fileName,
+                textSpan: ts.createTextSpanFromBounds(start, end),
+                isWriteAccess: isWriteAccess(node)
+            };
+        }
+        function isWriteAccess(node) {
+            if (node.kind === 69 && ts.isDeclarationName(node)) {
+                return true;
+            }
+            var parent = node.parent;
+            if (parent) {
+                if (parent.kind === 186 || parent.kind === 185) {
+                    return true;
+                }
+                else if (parent.kind === 187 && parent.left === node) {
+                    var operator = parent.operatorToken.kind;
+                    return 56 <= operator && operator <= 68;
+                }
+            }
+            return false;
+        }
+        function getNavigateToItems(searchValue, maxResultCount) {
+            synchronizeHostData();
+            var checker = getProgram().getTypeChecker();
+            return ts.NavigateTo.getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount);
+        }
+        function getEmitOutput(fileName) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var outputFiles = [];
+            function writeFile(fileName, data, writeByteOrderMark) {
+                outputFiles.push({
+                    name: fileName,
+                    writeByteOrderMark: writeByteOrderMark,
+                    text: data
+                });
+            }
+            var emitOutput = program.emit(sourceFile, writeFile, cancellationToken);
+            return {
+                outputFiles: outputFiles,
+                emitSkipped: emitOutput.emitSkipped
+            };
+        }
+        function getMeaningFromDeclaration(node) {
+            switch (node.kind) {
+                case 142:
+                case 218:
+                case 169:
+                case 145:
+                case 144:
+                case 253:
+                case 254:
+                case 255:
+                case 147:
+                case 146:
+                case 148:
+                case 149:
+                case 150:
+                case 220:
+                case 179:
+                case 180:
+                case 252:
+                    return 1;
+                case 141:
+                case 222:
+                case 223:
+                case 159:
+                    return 2;
+                case 221:
+                case 224:
+                    return 1 | 2;
+                case 225:
+                    if (ts.isAmbientModule(node)) {
+                        return 4 | 1;
+                    }
+                    else if (ts.getModuleInstanceState(node) === 1) {
+                        return 4 | 1;
+                    }
+                    else {
+                        return 4;
+                    }
+                case 233:
+                case 234:
+                case 229:
+                case 230:
+                case 235:
+                case 236:
+                    return 1 | 2 | 4;
+                case 256:
+                    return 4 | 1;
+            }
+            return 1 | 2 | 4;
+        }
+        function isTypeReference(node) {
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(node)) {
+                node = node.parent;
+            }
+            return node.parent.kind === 155 ||
+                (node.parent.kind === 194 && !ts.isExpressionWithTypeArgumentsInClassExtendsClause(node.parent)) ||
+                (node.kind === 97 && !ts.isExpression(node)) ||
+                node.kind === 165;
+        }
+        function isNamespaceReference(node) {
+            return isQualifiedNameNamespaceReference(node) || isPropertyAccessNamespaceReference(node);
+        }
+        function isPropertyAccessNamespaceReference(node) {
+            var root = node;
+            var isLastClause = true;
+            if (root.parent.kind === 172) {
+                while (root.parent && root.parent.kind === 172) {
+                    root = root.parent;
+                }
+                isLastClause = root.name === node;
+            }
+            if (!isLastClause && root.parent.kind === 194 && root.parent.parent.kind === 251) {
+                var decl = root.parent.parent.parent;
+                return (decl.kind === 221 && root.parent.parent.token === 106) ||
+                    (decl.kind === 222 && root.parent.parent.token === 83);
+            }
+            return false;
+        }
+        function isQualifiedNameNamespaceReference(node) {
+            var root = node;
+            var isLastClause = true;
+            if (root.parent.kind === 139) {
+                while (root.parent && root.parent.kind === 139) {
+                    root = root.parent;
+                }
+                isLastClause = root.right === node;
+            }
+            return root.parent.kind === 155 && !isLastClause;
+        }
+        function isInRightSideOfImport(node) {
+            while (node.parent.kind === 139) {
+                node = node.parent;
+            }
+            return ts.isInternalModuleImportEqualsDeclaration(node.parent) && node.parent.moduleReference === node;
+        }
+        function getMeaningFromRightHandSideOfImportEquals(node) {
+            ts.Debug.assert(node.kind === 69);
+            if (node.parent.kind === 139 &&
+                node.parent.right === node &&
+                node.parent.parent.kind === 229) {
+                return 1 | 2 | 4;
+            }
+            return 4;
+        }
+        function getMeaningFromLocation(node) {
+            if (node.parent.kind === 235) {
+                return 1 | 2 | 4;
+            }
+            else if (isInRightSideOfImport(node)) {
+                return getMeaningFromRightHandSideOfImportEquals(node);
+            }
+            else if (ts.isDeclarationName(node)) {
+                return getMeaningFromDeclaration(node.parent);
+            }
+            else if (isTypeReference(node)) {
+                return 2;
+            }
+            else if (isNamespaceReference(node)) {
+                return 4;
+            }
+            else {
+                return 1;
+            }
+        }
+        function getSignatureHelpItems(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            return ts.SignatureHelp.getSignatureHelpItems(program, sourceFile, position, cancellationToken);
+        }
+        function getNonBoundSourceFile(fileName) {
+            return syntaxTreeCache.getCurrentSourceFile(fileName);
+        }
+        function getNameOrDottedNameSpan(fileName, startPos, endPos) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, startPos);
+            if (node === sourceFile) {
+                return;
+            }
+            switch (node.kind) {
+                case 172:
+                case 139:
+                case 9:
+                case 166:
+                case 84:
+                case 99:
+                case 93:
+                case 95:
+                case 97:
+                case 165:
+                case 69:
+                    break;
+                default:
+                    return;
+            }
+            var nodeForStartPos = node;
+            while (true) {
+                if (isRightSideOfPropertyAccess(nodeForStartPos) || isRightSideOfQualifiedName(nodeForStartPos)) {
+                    nodeForStartPos = nodeForStartPos.parent;
+                }
+                else if (isNameOfModuleDeclaration(nodeForStartPos)) {
+                    if (nodeForStartPos.parent.parent.kind === 225 &&
+                        nodeForStartPos.parent.parent.body === nodeForStartPos.parent) {
+                        nodeForStartPos = nodeForStartPos.parent.parent.name;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                else {
+                    break;
+                }
+            }
+            return ts.createTextSpanFromBounds(nodeForStartPos.getStart(), node.getEnd());
+        }
+        function getBreakpointStatementAtPosition(fileName, position) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.BreakpointResolver.spanInSourceFileAtLocation(sourceFile, position);
+        }
+        function getNavigationBarItems(fileName) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.NavigationBar.getNavigationBarItems(sourceFile, host.getCompilationSettings());
+        }
+        function getSemanticClassifications(fileName, span) {
+            return convertClassifications(getEncodedSemanticClassifications(fileName, span));
+        }
+        function checkForClassificationCancellation(kind) {
+            switch (kind) {
+                case 225:
+                case 221:
+                case 222:
+                case 220:
+                    cancellationToken.throwIfCancellationRequested();
+            }
+        }
+        function getEncodedSemanticClassifications(fileName, span) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var typeChecker = program.getTypeChecker();
+            var result = [];
+            var classifiableNames = program.getClassifiableNames();
+            processNode(sourceFile);
+            return { spans: result, endOfLineState: 0 };
+            function pushClassification(start, length, type) {
+                result.push(start);
+                result.push(length);
+                result.push(type);
+            }
+            function classifySymbol(symbol, meaningAtPosition) {
+                var flags = symbol.getFlags();
+                if ((flags & 788448) === 0) {
+                    return;
+                }
+                if (flags & 32) {
+                    return 11;
+                }
+                else if (flags & 384) {
+                    return 12;
+                }
+                else if (flags & 524288) {
+                    return 16;
+                }
+                else if (meaningAtPosition & 2) {
+                    if (flags & 64) {
+                        return 13;
+                    }
+                    else if (flags & 262144) {
+                        return 15;
+                    }
+                }
+                else if (flags & 1536) {
+                    if (meaningAtPosition & 4 ||
+                        (meaningAtPosition & 1 && hasValueSideModule(symbol))) {
+                        return 14;
+                    }
+                }
+                return undefined;
+                function hasValueSideModule(symbol) {
+                    return ts.forEach(symbol.declarations, function (declaration) {
+                        return declaration.kind === 225 &&
+                            ts.getModuleInstanceState(declaration) === 1;
+                    });
+                }
+            }
+            function processNode(node) {
+                if (node && ts.textSpanIntersectsWith(span, node.getFullStart(), node.getFullWidth())) {
+                    var kind = node.kind;
+                    checkForClassificationCancellation(kind);
+                    if (kind === 69 && !ts.nodeIsMissing(node)) {
+                        var identifier = node;
+                        if (classifiableNames[identifier.text]) {
+                            var symbol = typeChecker.getSymbolAtLocation(node);
+                            if (symbol) {
+                                var type = classifySymbol(symbol, getMeaningFromLocation(node));
+                                if (type) {
+                                    pushClassification(node.getStart(), node.getWidth(), type);
+                                }
+                            }
+                        }
+                    }
+                    ts.forEachChild(node, processNode);
+                }
+            }
+        }
+        function getClassificationTypeName(type) {
+            switch (type) {
+                case 1: return ClassificationTypeNames.comment;
+                case 2: return ClassificationTypeNames.identifier;
+                case 3: return ClassificationTypeNames.keyword;
+                case 4: return ClassificationTypeNames.numericLiteral;
+                case 5: return ClassificationTypeNames.operator;
+                case 6: return ClassificationTypeNames.stringLiteral;
+                case 8: return ClassificationTypeNames.whiteSpace;
+                case 9: return ClassificationTypeNames.text;
+                case 10: return ClassificationTypeNames.punctuation;
+                case 11: return ClassificationTypeNames.className;
+                case 12: return ClassificationTypeNames.enumName;
+                case 13: return ClassificationTypeNames.interfaceName;
+                case 14: return ClassificationTypeNames.moduleName;
+                case 15: return ClassificationTypeNames.typeParameterName;
+                case 16: return ClassificationTypeNames.typeAliasName;
+                case 17: return ClassificationTypeNames.parameterName;
+                case 18: return ClassificationTypeNames.docCommentTagName;
+                case 19: return ClassificationTypeNames.jsxOpenTagName;
+                case 20: return ClassificationTypeNames.jsxCloseTagName;
+                case 21: return ClassificationTypeNames.jsxSelfClosingTagName;
+                case 22: return ClassificationTypeNames.jsxAttribute;
+                case 23: return ClassificationTypeNames.jsxText;
+                case 24: return ClassificationTypeNames.jsxAttributeStringLiteralValue;
+            }
+        }
+        function convertClassifications(classifications) {
+            ts.Debug.assert(classifications.spans.length % 3 === 0);
+            var dense = classifications.spans;
+            var result = [];
+            for (var i = 0, n = dense.length; i < n; i += 3) {
+                result.push({
+                    textSpan: ts.createTextSpan(dense[i], dense[i + 1]),
+                    classificationType: getClassificationTypeName(dense[i + 2])
+                });
+            }
+            return result;
+        }
+        function getSyntacticClassifications(fileName, span) {
+            return convertClassifications(getEncodedSyntacticClassifications(fileName, span));
+        }
+        function getEncodedSyntacticClassifications(fileName, span) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            var spanStart = span.start;
+            var spanLength = span.length;
+            var triviaScanner = ts.createScanner(2, false, sourceFile.languageVariant, sourceFile.text);
+            var mergeConflictScanner = ts.createScanner(2, false, sourceFile.languageVariant, sourceFile.text);
+            var result = [];
+            processElement(sourceFile);
+            return { spans: result, endOfLineState: 0 };
+            function pushClassification(start, length, type) {
+                result.push(start);
+                result.push(length);
+                result.push(type);
+            }
+            function classifyLeadingTriviaAndGetTokenStart(token) {
+                triviaScanner.setTextPos(token.pos);
+                while (true) {
+                    var start = triviaScanner.getTextPos();
+                    if (!ts.couldStartTrivia(sourceFile.text, start)) {
+                        return start;
+                    }
+                    var kind = triviaScanner.scan();
+                    var end = triviaScanner.getTextPos();
+                    var width = end - start;
+                    if (!ts.isTrivia(kind)) {
+                        return start;
+                    }
+                    if (kind === 4 || kind === 5) {
+                        continue;
+                    }
+                    if (ts.isComment(kind)) {
+                        classifyComment(token, kind, start, width);
+                        triviaScanner.setTextPos(end);
+                        continue;
+                    }
+                    if (kind === 7) {
+                        var text = sourceFile.text;
+                        var ch = text.charCodeAt(start);
+                        if (ch === 60 || ch === 62) {
+                            pushClassification(start, width, 1);
+                            continue;
+                        }
+                        ts.Debug.assert(ch === 61);
+                        classifyDisabledMergeCode(text, start, end);
+                    }
+                }
+            }
+            function classifyComment(token, kind, start, width) {
+                if (kind === 3) {
+                    var docCommentAndDiagnostics = ts.parseIsolatedJSDocComment(sourceFile.text, start, width);
+                    if (docCommentAndDiagnostics && docCommentAndDiagnostics.jsDocComment) {
+                        docCommentAndDiagnostics.jsDocComment.parent = token;
+                        classifyJSDocComment(docCommentAndDiagnostics.jsDocComment);
+                        return;
+                    }
+                }
+                pushCommentRange(start, width);
+            }
+            function pushCommentRange(start, width) {
+                pushClassification(start, width, 1);
+            }
+            function classifyJSDocComment(docComment) {
+                var pos = docComment.pos;
+                for (var _i = 0, _a = docComment.tags; _i < _a.length; _i++) {
+                    var tag = _a[_i];
+                    if (tag.pos !== pos) {
+                        pushCommentRange(pos, tag.pos - pos);
+                    }
+                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, 10);
+                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, 18);
+                    pos = tag.tagName.end;
+                    switch (tag.kind) {
+                        case 275:
+                            processJSDocParameterTag(tag);
+                            break;
+                        case 278:
+                            processJSDocTemplateTag(tag);
+                            break;
+                        case 277:
+                            processElement(tag.typeExpression);
+                            break;
+                        case 276:
+                            processElement(tag.typeExpression);
+                            break;
+                    }
+                    pos = tag.end;
+                }
+                if (pos !== docComment.end) {
+                    pushCommentRange(pos, docComment.end - pos);
+                }
+                return;
+                function processJSDocParameterTag(tag) {
+                    if (tag.preParameterName) {
+                        pushCommentRange(pos, tag.preParameterName.pos - pos);
+                        pushClassification(tag.preParameterName.pos, tag.preParameterName.end - tag.preParameterName.pos, 17);
+                        pos = tag.preParameterName.end;
+                    }
+                    if (tag.typeExpression) {
+                        pushCommentRange(pos, tag.typeExpression.pos - pos);
+                        processElement(tag.typeExpression);
+                        pos = tag.typeExpression.end;
+                    }
+                    if (tag.postParameterName) {
+                        pushCommentRange(pos, tag.postParameterName.pos - pos);
+                        pushClassification(tag.postParameterName.pos, tag.postParameterName.end - tag.postParameterName.pos, 17);
+                        pos = tag.postParameterName.end;
+                    }
+                }
+            }
+            function processJSDocTemplateTag(tag) {
+                for (var _i = 0, _a = tag.getChildren(); _i < _a.length; _i++) {
+                    var child = _a[_i];
+                    processElement(child);
+                }
+            }
+            function classifyDisabledMergeCode(text, start, end) {
+                var i;
+                for (i = start; i < end; i++) {
+                    if (ts.isLineBreak(text.charCodeAt(i))) {
+                        break;
+                    }
+                }
+                pushClassification(start, i - start, 1);
+                mergeConflictScanner.setTextPos(i);
+                while (mergeConflictScanner.getTextPos() < end) {
+                    classifyDisabledCodeToken();
+                }
+            }
+            function classifyDisabledCodeToken() {
+                var start = mergeConflictScanner.getTextPos();
+                var tokenKind = mergeConflictScanner.scan();
+                var end = mergeConflictScanner.getTextPos();
+                var type = classifyTokenType(tokenKind);
+                if (type) {
+                    pushClassification(start, end - start, type);
+                }
+            }
+            function tryClassifyNode(node) {
+                if (ts.nodeIsMissing(node)) {
+                    return true;
+                }
+                var classifiedElementName = tryClassifyJsxElementName(node);
+                if (!ts.isToken(node) && node.kind !== 244 && classifiedElementName === undefined) {
+                    return false;
+                }
+                var tokenStart = node.kind === 244 ? node.pos : classifyLeadingTriviaAndGetTokenStart(node);
+                var tokenWidth = node.end - tokenStart;
+                ts.Debug.assert(tokenWidth >= 0);
+                if (tokenWidth > 0) {
+                    var type = classifiedElementName || classifyTokenType(node.kind, node);
+                    if (type) {
+                        pushClassification(tokenStart, tokenWidth, type);
+                    }
+                }
+                return true;
+            }
+            function tryClassifyJsxElementName(token) {
+                switch (token.parent && token.parent.kind) {
+                    case 243:
+                        if (token.parent.tagName === token) {
+                            return 19;
+                        }
+                        break;
+                    case 245:
+                        if (token.parent.tagName === token) {
+                            return 20;
+                        }
+                        break;
+                    case 242:
+                        if (token.parent.tagName === token) {
+                            return 21;
+                        }
+                        break;
+                    case 246:
+                        if (token.parent.name === token) {
+                            return 22;
+                        }
+                        break;
+                }
+                return undefined;
+            }
+            function classifyTokenType(tokenKind, token) {
+                if (ts.isKeyword(tokenKind)) {
+                    return 3;
+                }
+                if (tokenKind === 25 || tokenKind === 27) {
+                    if (token && ts.getTypeArgumentOrTypeParameterList(token.parent)) {
+                        return 10;
+                    }
+                }
+                if (ts.isPunctuation(tokenKind)) {
+                    if (token) {
+                        if (tokenKind === 56) {
+                            if (token.parent.kind === 218 ||
+                                token.parent.kind === 145 ||
+                                token.parent.kind === 142 ||
+                                token.parent.kind === 246) {
+                                return 5;
+                            }
+                        }
+                        if (token.parent.kind === 187 ||
+                            token.parent.kind === 185 ||
+                            token.parent.kind === 186 ||
+                            token.parent.kind === 188) {
+                            return 5;
+                        }
+                    }
+                    return 10;
+                }
+                else if (tokenKind === 8) {
+                    return 4;
+                }
+                else if (tokenKind === 9 || tokenKind === 166) {
+                    return token.parent.kind === 246 ? 24 : 6;
+                }
+                else if (tokenKind === 10) {
+                    return 6;
+                }
+                else if (ts.isTemplateLiteralKind(tokenKind)) {
+                    return 6;
+                }
+                else if (tokenKind === 244) {
+                    return 23;
+                }
+                else if (tokenKind === 69) {
+                    if (token) {
+                        switch (token.parent.kind) {
+                            case 221:
+                                if (token.parent.name === token) {
+                                    return 11;
+                                }
+                                return;
+                            case 141:
+                                if (token.parent.name === token) {
+                                    return 15;
+                                }
+                                return;
+                            case 222:
+                                if (token.parent.name === token) {
+                                    return 13;
+                                }
+                                return;
+                            case 224:
+                                if (token.parent.name === token) {
+                                    return 12;
+                                }
+                                return;
+                            case 225:
+                                if (token.parent.name === token) {
+                                    return 14;
+                                }
+                                return;
+                            case 142:
+                                if (token.parent.name === token) {
+                                    return 17;
+                                }
+                                return;
+                        }
+                    }
+                    return 2;
+                }
+            }
+            function processElement(element) {
+                if (!element) {
+                    return;
+                }
+                if (ts.decodedTextSpanIntersectsWith(spanStart, spanLength, element.pos, element.getFullWidth())) {
+                    checkForClassificationCancellation(element.kind);
+                    var children = element.getChildren(sourceFile);
+                    for (var i = 0, n = children.length; i < n; i++) {
+                        var child = children[i];
+                        if (!tryClassifyNode(child)) {
+                            processElement(child);
+                        }
+                    }
+                }
+            }
+        }
+        function getOutliningSpans(fileName) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.OutliningElementsCollector.collectElements(sourceFile);
+        }
+        function getBraceMatchingAtPosition(fileName, position) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            var result = [];
+            var token = ts.getTouchingToken(sourceFile, position);
+            if (token.getStart(sourceFile) === position) {
+                var matchKind = getMatchingTokenKind(token);
+                if (matchKind) {
+                    var parentElement = token.parent;
+                    var childNodes = parentElement.getChildren(sourceFile);
+                    for (var _i = 0, childNodes_1 = childNodes; _i < childNodes_1.length; _i++) {
+                        var current = childNodes_1[_i];
+                        if (current.kind === matchKind) {
+                            var range1 = ts.createTextSpan(token.getStart(sourceFile), token.getWidth(sourceFile));
+                            var range2 = ts.createTextSpan(current.getStart(sourceFile), current.getWidth(sourceFile));
+                            if (range1.start < range2.start) {
+                                result.push(range1, range2);
+                            }
+                            else {
+                                result.push(range2, range1);
+                            }
+                            break;
+                        }
+                    }
+                }
+            }
+            return result;
+            function getMatchingTokenKind(token) {
+                switch (token.kind) {
+                    case 15: return 16;
+                    case 17: return 18;
+                    case 19: return 20;
+                    case 25: return 27;
+                    case 16: return 15;
+                    case 18: return 17;
+                    case 20: return 19;
+                    case 27: return 25;
+                }
+                return undefined;
+            }
+        }
+        function getIndentationAtPosition(fileName, position, editorOptions) {
+            var start = new Date().getTime();
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            log("getIndentationAtPosition: getCurrentSourceFile: " + (new Date().getTime() - start));
+            start = new Date().getTime();
+            var result = ts.formatting.SmartIndenter.getIndentation(position, sourceFile, editorOptions);
+            log("getIndentationAtPosition: computeIndentation  : " + (new Date().getTime() - start));
+            return result;
+        }
+        function getFormattingEditsForRange(fileName, start, end, options) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.formatting.formatSelection(start, end, sourceFile, getRuleProvider(options), options);
+        }
+        function getFormattingEditsForDocument(fileName, options) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.formatting.formatDocument(sourceFile, getRuleProvider(options), options);
+        }
+        function getFormattingEditsAfterKeystroke(fileName, position, key, options) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            if (key === "}") {
+                return ts.formatting.formatOnClosingCurly(position, sourceFile, getRuleProvider(options), options);
+            }
+            else if (key === ";") {
+                return ts.formatting.formatOnSemicolon(position, sourceFile, getRuleProvider(options), options);
+            }
+            else if (key === "\n") {
+                return ts.formatting.formatOnEnter(position, sourceFile, getRuleProvider(options), options);
+            }
+            return [];
+        }
+        function getDocCommentTemplateAtPosition(fileName, position) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position) || ts.hasDocComment(sourceFile, position)) {
+                return undefined;
+            }
+            var tokenAtPos = ts.getTokenAtPosition(sourceFile, position);
+            var tokenStart = tokenAtPos.getStart();
+            if (!tokenAtPos || tokenStart < position) {
+                return undefined;
+            }
+            var commentOwner;
+            findOwner: for (commentOwner = tokenAtPos; commentOwner; commentOwner = commentOwner.parent) {
+                switch (commentOwner.kind) {
+                    case 220:
+                    case 147:
+                    case 148:
+                    case 221:
+                    case 200:
+                        break findOwner;
+                    case 256:
+                        return undefined;
+                    case 225:
+                        if (commentOwner.parent.kind === 225) {
+                            return undefined;
+                        }
+                        break findOwner;
+                }
+            }
+            if (!commentOwner || commentOwner.getStart() < position) {
+                return undefined;
+            }
+            var parameters = getParametersForJsDocOwningNode(commentOwner);
+            var posLineAndChar = sourceFile.getLineAndCharacterOfPosition(position);
+            var lineStart = sourceFile.getLineStarts()[posLineAndChar.line];
+            var indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character);
+            var newLine = ts.getNewLineOrDefaultFromHost(host);
+            var docParams = "";
+            for (var i = 0, numParams = parameters.length; i < numParams; i++) {
+                var currentName = parameters[i].name;
+                var paramName = currentName.kind === 69 ?
+                    currentName.text :
+                    "param" + i;
+                docParams += indentationStr + " * @param " + paramName + newLine;
+            }
+            var preamble = "/**" + newLine +
+                indentationStr + " * ";
+            var result = preamble + newLine +
+                docParams +
+                indentationStr + " */" +
+                (tokenStart === position ? newLine + indentationStr : "");
+            return { newText: result, caretOffset: preamble.length };
+        }
+        function isValidBraceCompletionAtPostion(fileName, position, openingBrace) {
+            if (openingBrace === 60) {
+                return false;
+            }
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position)) {
+                return false;
+            }
+            if (ts.isInsideJsxElementOrAttribute(sourceFile, position)) {
+                return openingBrace === 123;
+            }
+            if (ts.isInTemplateString(sourceFile, position)) {
+                return false;
+            }
+            return true;
+        }
+        function getParametersForJsDocOwningNode(commentOwner) {
+            if (ts.isFunctionLike(commentOwner)) {
+                return commentOwner.parameters;
+            }
+            if (commentOwner.kind === 200) {
+                var varStatement = commentOwner;
+                var varDeclarations = varStatement.declarationList.declarations;
+                if (varDeclarations.length === 1 && varDeclarations[0].initializer) {
+                    return getParametersFromRightHandSideOfAssignment(varDeclarations[0].initializer);
+                }
+            }
+            return emptyArray;
+        }
+        function getParametersFromRightHandSideOfAssignment(rightHandSide) {
+            while (rightHandSide.kind === 178) {
+                rightHandSide = rightHandSide.expression;
+            }
+            switch (rightHandSide.kind) {
+                case 179:
+                case 180:
+                    return rightHandSide.parameters;
+                case 192:
+                    for (var _i = 0, _a = rightHandSide.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        if (member.kind === 148) {
+                            return member.parameters;
+                        }
+                    }
+                    break;
+            }
+            return emptyArray;
+        }
+        function getTodoComments(fileName, descriptors) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            cancellationToken.throwIfCancellationRequested();
+            var fileContents = sourceFile.text;
+            var result = [];
+            if (descriptors.length > 0) {
+                var regExp = getTodoCommentsRegExp();
+                var matchArray = void 0;
+                while (matchArray = regExp.exec(fileContents)) {
+                    cancellationToken.throwIfCancellationRequested();
+                    var firstDescriptorCaptureIndex = 3;
+                    ts.Debug.assert(matchArray.length === descriptors.length + firstDescriptorCaptureIndex);
+                    var preamble = matchArray[1];
+                    var matchPosition = matchArray.index + preamble.length;
+                    var token = ts.getTokenAtPosition(sourceFile, matchPosition);
+                    if (!isInsideComment(sourceFile, token, matchPosition)) {
+                        continue;
+                    }
+                    var descriptor = undefined;
+                    for (var i = 0, n = descriptors.length; i < n; i++) {
+                        if (matchArray[i + firstDescriptorCaptureIndex]) {
+                            descriptor = descriptors[i];
+                        }
+                    }
+                    ts.Debug.assert(descriptor !== undefined);
+                    if (isLetterOrDigit(fileContents.charCodeAt(matchPosition + descriptor.text.length))) {
+                        continue;
+                    }
+                    var message = matchArray[2];
+                    result.push({
+                        descriptor: descriptor,
+                        message: message,
+                        position: matchPosition
+                    });
+                }
+            }
+            return result;
+            function escapeRegExp(str) {
+                return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
+            }
+            function getTodoCommentsRegExp() {
+                var singleLineCommentStart = /(?:\/\/+\s*)/.source;
+                var multiLineCommentStart = /(?:\/\*+\s*)/.source;
+                var anyNumberOfSpacesAndAsterisksAtStartOfLine = /(?:^(?:\s|\*)*)/.source;
+                var preamble = "(" + anyNumberOfSpacesAndAsterisksAtStartOfLine + "|" + singleLineCommentStart + "|" + multiLineCommentStart + ")";
+                var literals = "(?:" + ts.map(descriptors, function (d) { return "(" + escapeRegExp(d.text) + ")"; }).join("|") + ")";
+                var endOfLineOrEndOfComment = /(?:$|\*\/)/.source;
+                var messageRemainder = /(?:.*?)/.source;
+                var messagePortion = "(" + literals + messageRemainder + ")";
+                var regExpString = preamble + messagePortion + endOfLineOrEndOfComment;
+                return new RegExp(regExpString, "gim");
+            }
+            function isLetterOrDigit(char) {
+                return (char >= 97 && char <= 122) ||
+                    (char >= 65 && char <= 90) ||
+                    (char >= 48 && char <= 57);
+            }
+        }
+        function getStringLiteralTypeForNode(node, typeChecker) {
+            var searchNode = node.parent.kind === 166 ? node.parent : node;
+            var type = typeChecker.getTypeAtLocation(searchNode);
+            if (type && type.flags & 256) {
+                return type;
+            }
+            return undefined;
+        }
+        function getRenameInfo(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var typeChecker = program.getTypeChecker();
+            var defaultLibFileName = host.getDefaultLibFileName(host.getCompilationSettings());
+            var canonicalDefaultLibName = getCanonicalFileName(ts.normalizePath(defaultLibFileName));
+            var node = ts.getTouchingWord(sourceFile, position, true);
+            if (node) {
+                if (node.kind === 69 ||
+                    node.kind === 9 ||
+                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                    var symbol = typeChecker.getSymbolAtLocation(node);
+                    if (symbol) {
+                        var declarations = symbol.getDeclarations();
+                        if (declarations && declarations.length > 0) {
+                            if (ts.forEach(declarations, isDefinedInLibraryFile)) {
+                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
+                            }
+                            var displayName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
+                            var kind = getSymbolKind(symbol, node);
+                            if (kind) {
+                                return {
+                                    canRename: true,
+                                    kind: kind,
+                                    displayName: displayName,
+                                    localizedErrorMessage: undefined,
+                                    fullDisplayName: typeChecker.getFullyQualifiedName(symbol),
+                                    kindModifiers: getSymbolModifiers(symbol),
+                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
+                                };
+                            }
+                        }
+                    }
+                    else if (node.kind === 9) {
+                        var type = getStringLiteralTypeForNode(node, typeChecker);
+                        if (type) {
+                            if (isDefinedInLibraryFile(node)) {
+                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
+                            }
+                            else {
+                                var displayName = ts.stripQuotes(type.text);
+                                return {
+                                    canRename: true,
+                                    kind: ScriptElementKind.variableElement,
+                                    displayName: displayName,
+                                    localizedErrorMessage: undefined,
+                                    fullDisplayName: displayName,
+                                    kindModifiers: ScriptElementKindModifier.none,
+                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
+                                };
+                            }
+                        }
+                    }
+                }
+            }
+            return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_this_element));
+            function getRenameInfoError(localizedErrorMessage) {
+                return {
+                    canRename: false,
+                    localizedErrorMessage: localizedErrorMessage,
+                    displayName: undefined,
+                    fullDisplayName: undefined,
+                    kind: undefined,
+                    kindModifiers: undefined,
+                    triggerSpan: undefined
+                };
+            }
+            function isDefinedInLibraryFile(declaration) {
+                if (defaultLibFileName) {
+                    var sourceFile_2 = declaration.getSourceFile();
+                    var canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile_2.fileName));
+                    if (canonicalName === canonicalDefaultLibName) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function createTriggerSpanForNode(node, sourceFile) {
+                var start = node.getStart(sourceFile);
+                var width = node.getWidth(sourceFile);
+                if (node.kind === 9) {
+                    start += 1;
+                    width -= 2;
+                }
+                return ts.createTextSpan(start, width);
+            }
+        }
+        return {
+            dispose: dispose,
+            cleanupSemanticCache: cleanupSemanticCache,
+            getSyntacticDiagnostics: getSyntacticDiagnostics,
+            getSemanticDiagnostics: getSemanticDiagnostics,
+            getCompilerOptionsDiagnostics: getCompilerOptionsDiagnostics,
+            getSyntacticClassifications: getSyntacticClassifications,
+            getSemanticClassifications: getSemanticClassifications,
+            getEncodedSyntacticClassifications: getEncodedSyntacticClassifications,
+            getEncodedSemanticClassifications: getEncodedSemanticClassifications,
+            getCompletionsAtPosition: getCompletionsAtPosition,
+            getCompletionEntryDetails: getCompletionEntryDetails,
+            getSignatureHelpItems: getSignatureHelpItems,
+            getQuickInfoAtPosition: getQuickInfoAtPosition,
+            getDefinitionAtPosition: getDefinitionAtPosition,
+            getTypeDefinitionAtPosition: getTypeDefinitionAtPosition,
+            getReferencesAtPosition: getReferencesAtPosition,
+            findReferences: findReferences,
+            getOccurrencesAtPosition: getOccurrencesAtPosition,
+            getDocumentHighlights: getDocumentHighlights,
+            getNameOrDottedNameSpan: getNameOrDottedNameSpan,
+            getBreakpointStatementAtPosition: getBreakpointStatementAtPosition,
+            getNavigateToItems: getNavigateToItems,
+            getRenameInfo: getRenameInfo,
+            findRenameLocations: findRenameLocations,
+            getNavigationBarItems: getNavigationBarItems,
+            getOutliningSpans: getOutliningSpans,
+            getTodoComments: getTodoComments,
+            getBraceMatchingAtPosition: getBraceMatchingAtPosition,
+            getIndentationAtPosition: getIndentationAtPosition,
+            getFormattingEditsForRange: getFormattingEditsForRange,
+            getFormattingEditsForDocument: getFormattingEditsForDocument,
+            getFormattingEditsAfterKeystroke: getFormattingEditsAfterKeystroke,
+            getDocCommentTemplateAtPosition: getDocCommentTemplateAtPosition,
+            isValidBraceCompletionAtPostion: isValidBraceCompletionAtPostion,
+            getEmitOutput: getEmitOutput,
+            getNonBoundSourceFile: getNonBoundSourceFile,
+            getProgram: getProgram
+        };
+    }
+    ts.createLanguageService = createLanguageService;
+    function getNameTable(sourceFile) {
+        if (!sourceFile.nameTable) {
+            initializeNameTable(sourceFile);
+        }
+        return sourceFile.nameTable;
+    }
+    ts.getNameTable = getNameTable;
+    function initializeNameTable(sourceFile) {
+        var nameTable = {};
+        walk(sourceFile);
+        sourceFile.nameTable = nameTable;
+        function walk(node) {
+            switch (node.kind) {
+                case 69:
+                    nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
+                    break;
+                case 9:
+                case 8:
+                    if (ts.isDeclarationName(node) ||
+                        node.parent.kind === 240 ||
+                        isArgumentOfElementAccessExpression(node) ||
+                        ts.isLiteralComputedPropertyDeclarationName(node)) {
+                        nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
+                    }
+                    break;
+                default:
+                    ts.forEachChild(node, walk);
+                    if (node.jsDocComments) {
+                        for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                            var jsDocComment = _a[_i];
+                            ts.forEachChild(jsDocComment, walk);
+                        }
+                    }
+            }
+        }
+    }
+    function isArgumentOfElementAccessExpression(node) {
+        return node &&
+            node.parent &&
+            node.parent.kind === 173 &&
+            node.parent.argumentExpression === node;
+    }
+    function createClassifier() {
+        var scanner = ts.createScanner(2, false);
+        var noRegexTable = [];
+        noRegexTable[69] = true;
+        noRegexTable[9] = true;
+        noRegexTable[8] = true;
+        noRegexTable[10] = true;
+        noRegexTable[97] = true;
+        noRegexTable[41] = true;
+        noRegexTable[42] = true;
+        noRegexTable[18] = true;
+        noRegexTable[20] = true;
+        noRegexTable[16] = true;
+        noRegexTable[99] = true;
+        noRegexTable[84] = true;
+        var templateStack = [];
+        function canFollow(keyword1, keyword2) {
+            if (ts.isAccessibilityModifier(keyword1)) {
+                if (keyword2 === 123 ||
+                    keyword2 === 131 ||
+                    keyword2 === 121 ||
+                    keyword2 === 113) {
+                    return true;
+                }
+                return false;
+            }
+            return true;
+        }
+        function convertClassifications(classifications, text) {
+            var entries = [];
+            var dense = classifications.spans;
+            var lastEnd = 0;
+            for (var i = 0, n = dense.length; i < n; i += 3) {
+                var start = dense[i];
+                var length_3 = dense[i + 1];
+                var type = dense[i + 2];
+                if (lastEnd >= 0) {
+                    var whitespaceLength_1 = start - lastEnd;
+                    if (whitespaceLength_1 > 0) {
+                        entries.push({ length: whitespaceLength_1, classification: TokenClass.Whitespace });
+                    }
+                }
+                entries.push({ length: length_3, classification: convertClassification(type) });
+                lastEnd = start + length_3;
+            }
+            var whitespaceLength = text.length - lastEnd;
+            if (whitespaceLength > 0) {
+                entries.push({ length: whitespaceLength, classification: TokenClass.Whitespace });
+            }
+            return { entries: entries, finalLexState: classifications.endOfLineState };
+        }
+        function convertClassification(type) {
+            switch (type) {
+                case 1: return TokenClass.Comment;
+                case 3: return TokenClass.Keyword;
+                case 4: return TokenClass.NumberLiteral;
+                case 5: return TokenClass.Operator;
+                case 6: return TokenClass.StringLiteral;
+                case 8: return TokenClass.Whitespace;
+                case 10: return TokenClass.Punctuation;
+                case 2:
+                case 11:
+                case 12:
+                case 13:
+                case 14:
+                case 15:
+                case 16:
+                case 9:
+                case 17:
+                default:
+                    return TokenClass.Identifier;
+            }
+        }
+        function getClassificationsForLine(text, lexState, syntacticClassifierAbsent) {
+            return convertClassifications(getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent), text);
+        }
+        function getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent) {
+            var offset = 0;
+            var token = 0;
+            var lastNonTriviaToken = 0;
+            while (templateStack.length > 0) {
+                templateStack.pop();
+            }
+            switch (lexState) {
+                case 3:
+                    text = "\"\\\n" + text;
+                    offset = 3;
+                    break;
+                case 2:
+                    text = "'\\\n" + text;
+                    offset = 3;
+                    break;
+                case 1:
+                    text = "/*\n" + text;
+                    offset = 3;
+                    break;
+                case 4:
+                    text = "`\n" + text;
+                    offset = 2;
+                    break;
+                case 5:
+                    text = "}\n" + text;
+                    offset = 2;
+                case 6:
+                    templateStack.push(12);
+                    break;
+            }
+            scanner.setText(text);
+            var result = {
+                endOfLineState: 0,
+                spans: []
+            };
+            var angleBracketStack = 0;
+            do {
+                token = scanner.scan();
+                if (!ts.isTrivia(token)) {
+                    if ((token === 39 || token === 61) && !noRegexTable[lastNonTriviaToken]) {
+                        if (scanner.reScanSlashToken() === 10) {
+                            token = 10;
+                        }
+                    }
+                    else if (lastNonTriviaToken === 21 && isKeyword(token)) {
+                        token = 69;
+                    }
+                    else if (isKeyword(lastNonTriviaToken) && isKeyword(token) && !canFollow(lastNonTriviaToken, token)) {
+                        token = 69;
+                    }
+                    else if (lastNonTriviaToken === 69 &&
+                        token === 25) {
+                        angleBracketStack++;
+                    }
+                    else if (token === 27 && angleBracketStack > 0) {
+                        angleBracketStack--;
+                    }
+                    else if (token === 117 ||
+                        token === 132 ||
+                        token === 130 ||
+                        token === 120 ||
+                        token === 133) {
+                        if (angleBracketStack > 0 && !syntacticClassifierAbsent) {
+                            token = 69;
+                        }
+                    }
+                    else if (token === 12) {
+                        templateStack.push(token);
+                    }
+                    else if (token === 15) {
+                        if (templateStack.length > 0) {
+                            templateStack.push(token);
+                        }
+                    }
+                    else if (token === 16) {
+                        if (templateStack.length > 0) {
+                            var lastTemplateStackToken = ts.lastOrUndefined(templateStack);
+                            if (lastTemplateStackToken === 12) {
+                                token = scanner.reScanTemplateToken();
+                                if (token === 14) {
+                                    templateStack.pop();
+                                }
+                                else {
+                                    ts.Debug.assert(token === 13, "Should have been a template middle. Was " + token);
+                                }
+                            }
+                            else {
+                                ts.Debug.assert(lastTemplateStackToken === 15, "Should have been an open brace. Was: " + token);
+                                templateStack.pop();
+                            }
+                        }
+                    }
+                    lastNonTriviaToken = token;
+                }
+                processToken();
+            } while (token !== 1);
+            return result;
+            function processToken() {
+                var start = scanner.getTokenPos();
+                var end = scanner.getTextPos();
+                addResult(start, end, classFromKind(token));
+                if (end >= text.length) {
+                    if (token === 9 || token === 166) {
+                        var tokenText = scanner.getTokenText();
+                        if (scanner.isUnterminated()) {
+                            var lastCharIndex = tokenText.length - 1;
+                            var numBackslashes = 0;
+                            while (tokenText.charCodeAt(lastCharIndex - numBackslashes) === 92) {
+                                numBackslashes++;
+                            }
+                            if (numBackslashes & 1) {
+                                var quoteChar = tokenText.charCodeAt(0);
+                                result.endOfLineState = quoteChar === 34
+                                    ? 3
+                                    : 2;
+                            }
+                        }
+                    }
+                    else if (token === 3) {
+                        if (scanner.isUnterminated()) {
+                            result.endOfLineState = 1;
+                        }
+                    }
+                    else if (ts.isTemplateLiteralKind(token)) {
+                        if (scanner.isUnterminated()) {
+                            if (token === 14) {
+                                result.endOfLineState = 5;
+                            }
+                            else if (token === 11) {
+                                result.endOfLineState = 4;
+                            }
+                            else {
+                                ts.Debug.fail("Only 'NoSubstitutionTemplateLiteral's and 'TemplateTail's can be unterminated; got SyntaxKind #" + token);
+                            }
+                        }
+                    }
+                    else if (templateStack.length > 0 && ts.lastOrUndefined(templateStack) === 12) {
+                        result.endOfLineState = 6;
+                    }
+                }
+            }
+            function addResult(start, end, classification) {
+                if (classification === 8) {
+                    return;
+                }
+                if (start === 0 && offset > 0) {
+                    start += offset;
+                }
+                start -= offset;
+                end -= offset;
+                var length = end - start;
+                if (length > 0) {
+                    result.spans.push(start);
+                    result.spans.push(length);
+                    result.spans.push(classification);
+                }
+            }
+        }
+        function isBinaryExpressionOperatorToken(token) {
+            switch (token) {
+                case 37:
+                case 39:
+                case 40:
+                case 35:
+                case 36:
+                case 43:
+                case 44:
+                case 45:
+                case 25:
+                case 27:
+                case 28:
+                case 29:
+                case 91:
+                case 90:
+                case 116:
+                case 30:
+                case 31:
+                case 32:
+                case 33:
+                case 46:
+                case 48:
+                case 47:
+                case 51:
+                case 52:
+                case 67:
+                case 66:
+                case 68:
+                case 63:
+                case 64:
+                case 65:
+                case 57:
+                case 58:
+                case 59:
+                case 61:
+                case 62:
+                case 56:
+                case 24:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isPrefixUnaryExpressionOperatorToken(token) {
+            switch (token) {
+                case 35:
+                case 36:
+                case 50:
+                case 49:
+                case 41:
+                case 42:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isKeyword(token) {
+            return token >= 70 && token <= 138;
+        }
+        function classFromKind(token) {
+            if (isKeyword(token)) {
+                return 3;
+            }
+            else if (isBinaryExpressionOperatorToken(token) || isPrefixUnaryExpressionOperatorToken(token)) {
+                return 5;
+            }
+            else if (token >= 15 && token <= 68) {
+                return 10;
+            }
+            switch (token) {
+                case 8:
+                    return 4;
+                case 9:
+                case 166:
+                    return 6;
+                case 10:
+                    return 7;
+                case 7:
+                case 3:
+                case 2:
+                    return 1;
+                case 5:
+                case 4:
+                    return 8;
+                case 69:
+                default:
+                    if (ts.isTemplateLiteralKind(token)) {
+                        return 6;
+                    }
+                    return 2;
+            }
+        }
+        return {
+            getClassificationsForLine: getClassificationsForLine,
+            getEncodedLexicalClassifications: getEncodedLexicalClassifications
+        };
+    }
+    ts.createClassifier = createClassifier;
+    function getDefaultLibFilePath(options) {
+        if (typeof __dirname !== "undefined") {
+            return __dirname + ts.directorySeparator + ts.getDefaultLibFileName(options);
+        }
+        throw new Error("getDefaultLibFilePath is only supported when consumed as a node module. ");
+    }
+    ts.getDefaultLibFilePath = getDefaultLibFilePath;
+    function initializeServices() {
+        ts.objectAllocator = {
+            getNodeConstructor: function () { return NodeObject; },
+            getSourceFileConstructor: function () { return SourceFileObject; },
+            getSymbolConstructor: function () { return SymbolObject; },
+            getTypeConstructor: function () { return TypeObject; },
+            getSignatureConstructor: function () { return SignatureObject; }
+        };
+    }
+    initializeServices();
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var server;
+    (function (server) {
+        var spaceCache = [];
+        function generateSpaces(n) {
+            if (!spaceCache[n]) {
+                var strBuilder = "";
+                for (var i = 0; i < n; i++) {
+                    strBuilder += " ";
+                }
+                spaceCache[n] = strBuilder;
+            }
+            return spaceCache[n];
+        }
+        server.generateSpaces = generateSpaces;
+        function generateIndentString(n, editorOptions) {
+            if (editorOptions.ConvertTabsToSpaces) {
+                return generateSpaces(n);
+            }
+            else {
+                var result = "";
+                for (var i = 0; i < Math.floor(n / editorOptions.TabSize); i++) {
+                    result += "\t";
+                }
+                for (var i = 0; i < n % editorOptions.TabSize; i++) {
+                    result += " ";
+                }
+                return result;
+            }
+        }
+        server.generateIndentString = generateIndentString;
+        function compareNumber(a, b) {
+            if (a < b) {
+                return -1;
+            }
+            else if (a === b) {
+                return 0;
+            }
+            else
+                return 1;
+        }
+        function compareFileStart(a, b) {
+            if (a.file < b.file) {
+                return -1;
+            }
+            else if (a.file == b.file) {
+                var n = compareNumber(a.start.line, b.start.line);
+                if (n === 0) {
+                    return compareNumber(a.start.offset, b.start.offset);
+                }
+                else
+                    return n;
+            }
+            else {
+                return 1;
+            }
+        }
+        function formatDiag(fileName, project, diag) {
+            return {
+                start: project.compilerService.host.positionToLineOffset(fileName, diag.start),
+                end: project.compilerService.host.positionToLineOffset(fileName, diag.start + diag.length),
+                text: ts.flattenDiagnosticMessageText(diag.messageText, "\n")
+            };
+        }
+        function formatConfigFileDiag(diag) {
+            return {
+                start: undefined,
+                end: undefined,
+                text: ts.flattenDiagnosticMessageText(diag.messageText, "\n")
+            };
+        }
+        function allEditsBeforePos(edits, pos) {
+            for (var i = 0, len = edits.length; i < len; i++) {
+                if (ts.textSpanEnd(edits[i].span) >= pos) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        var CommandNames;
+        (function (CommandNames) {
+            CommandNames.Brace = "brace";
+            CommandNames.Change = "change";
+            CommandNames.Close = "close";
+            CommandNames.Completions = "completions";
+            CommandNames.CompletionDetails = "completionEntryDetails";
+            CommandNames.Configure = "configure";
+            CommandNames.Definition = "definition";
+            CommandNames.Exit = "exit";
+            CommandNames.Format = "format";
+            CommandNames.Formatonkey = "formatonkey";
+            CommandNames.Geterr = "geterr";
+            CommandNames.GeterrForProject = "geterrForProject";
+            CommandNames.NavBar = "navbar";
+            CommandNames.Navto = "navto";
+            CommandNames.Occurrences = "occurrences";
+            CommandNames.DocumentHighlights = "documentHighlights";
+            CommandNames.Open = "open";
+            CommandNames.Quickinfo = "quickinfo";
+            CommandNames.References = "references";
+            CommandNames.Reload = "reload";
+            CommandNames.Rename = "rename";
+            CommandNames.Saveto = "saveto";
+            CommandNames.SignatureHelp = "signatureHelp";
+            CommandNames.TypeDefinition = "typeDefinition";
+            CommandNames.ProjectInfo = "projectInfo";
+            CommandNames.ReloadProjects = "reloadProjects";
+            CommandNames.Unknown = "unknown";
+        })(CommandNames = server.CommandNames || (server.CommandNames = {}));
+        var Errors;
+        (function (Errors) {
+            Errors.NoProject = new Error("No Project.");
+        })(Errors || (Errors = {}));
+        var Session = (function () {
+            function Session(host, byteLength, hrtime, logger) {
+                var _this = this;
+                this.host = host;
+                this.byteLength = byteLength;
+                this.hrtime = hrtime;
+                this.logger = logger;
+                this.changeSeq = 0;
+                this.handlers = (_a = {},
+                    _a[CommandNames.Exit] = function () {
+                        _this.exit();
+                        return { responseRequired: false };
+                    },
+                    _a[CommandNames.Definition] = function (request) {
+                        var defArgs = request.arguments;
+                        return { response: _this.getDefinition(defArgs.line, defArgs.offset, defArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.TypeDefinition] = function (request) {
+                        var defArgs = request.arguments;
+                        return { response: _this.getTypeDefinition(defArgs.line, defArgs.offset, defArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.References] = function (request) {
+                        var defArgs = request.arguments;
+                        return { response: _this.getReferences(defArgs.line, defArgs.offset, defArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.Rename] = function (request) {
+                        var renameArgs = request.arguments;
+                        return { response: _this.getRenameLocations(renameArgs.line, renameArgs.offset, renameArgs.file, renameArgs.findInComments, renameArgs.findInStrings), responseRequired: true };
+                    },
+                    _a[CommandNames.Open] = function (request) {
+                        var openArgs = request.arguments;
+                        var scriptKind;
+                        switch (openArgs.scriptKindName) {
+                            case "TS":
+                                scriptKind = 3;
+                                break;
+                            case "JS":
+                                scriptKind = 1;
+                                break;
+                            case "TSX":
+                                scriptKind = 4;
+                                break;
+                            case "JSX":
+                                scriptKind = 2;
+                                break;
+                        }
+                        _this.openClientFile(openArgs.file, openArgs.fileContent, scriptKind);
+                        return { responseRequired: false };
+                    },
+                    _a[CommandNames.Quickinfo] = function (request) {
+                        var quickinfoArgs = request.arguments;
+                        return { response: _this.getQuickInfo(quickinfoArgs.line, quickinfoArgs.offset, quickinfoArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.Format] = function (request) {
+                        var formatArgs = request.arguments;
+                        return { response: _this.getFormattingEditsForRange(formatArgs.line, formatArgs.offset, formatArgs.endLine, formatArgs.endOffset, formatArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.Formatonkey] = function (request) {
+                        var formatOnKeyArgs = request.arguments;
+                        return { response: _this.getFormattingEditsAfterKeystroke(formatOnKeyArgs.line, formatOnKeyArgs.offset, formatOnKeyArgs.key, formatOnKeyArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.Completions] = function (request) {
+                        var completionsArgs = request.arguments;
+                        return { response: _this.getCompletions(completionsArgs.line, completionsArgs.offset, completionsArgs.prefix, completionsArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.CompletionDetails] = function (request) {
+                        var completionDetailsArgs = request.arguments;
+                        return {
+                            response: _this.getCompletionEntryDetails(completionDetailsArgs.line, completionDetailsArgs.offset, completionDetailsArgs.entryNames, completionDetailsArgs.file), responseRequired: true
+                        };
+                    },
+                    _a[CommandNames.SignatureHelp] = function (request) {
+                        var signatureHelpArgs = request.arguments;
+                        return { response: _this.getSignatureHelpItems(signatureHelpArgs.line, signatureHelpArgs.offset, signatureHelpArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.Geterr] = function (request) {
+                        var geterrArgs = request.arguments;
+                        return { response: _this.getDiagnostics(geterrArgs.delay, geterrArgs.files), responseRequired: false };
+                    },
+                    _a[CommandNames.GeterrForProject] = function (request) {
+                        var _a = request.arguments, file = _a.file, delay = _a.delay;
+                        return { response: _this.getDiagnosticsForProject(delay, file), responseRequired: false };
+                    },
+                    _a[CommandNames.Change] = function (request) {
+                        var changeArgs = request.arguments;
+                        _this.change(changeArgs.line, changeArgs.offset, changeArgs.endLine, changeArgs.endOffset, changeArgs.insertString, changeArgs.file);
+                        return { responseRequired: false };
+                    },
+                    _a[CommandNames.Configure] = function (request) {
+                        var configureArgs = request.arguments;
+                        _this.projectService.setHostConfiguration(configureArgs);
+                        _this.output(undefined, CommandNames.Configure, request.seq);
+                        return { responseRequired: false };
+                    },
+                    _a[CommandNames.Reload] = function (request) {
+                        var reloadArgs = request.arguments;
+                        _this.reload(reloadArgs.file, reloadArgs.tmpfile, request.seq);
+                        return { response: { reloadFinished: true }, responseRequired: true };
+                    },
+                    _a[CommandNames.Saveto] = function (request) {
+                        var savetoArgs = request.arguments;
+                        _this.saveToTmp(savetoArgs.file, savetoArgs.tmpfile);
+                        return { responseRequired: false };
+                    },
+                    _a[CommandNames.Close] = function (request) {
+                        var closeArgs = request.arguments;
+                        _this.closeClientFile(closeArgs.file);
+                        return { responseRequired: false };
+                    },
+                    _a[CommandNames.Navto] = function (request) {
+                        var navtoArgs = request.arguments;
+                        return { response: _this.getNavigateToItems(navtoArgs.searchValue, navtoArgs.file, navtoArgs.maxResultCount), responseRequired: true };
+                    },
+                    _a[CommandNames.Brace] = function (request) {
+                        var braceArguments = request.arguments;
+                        return { response: _this.getBraceMatching(braceArguments.line, braceArguments.offset, braceArguments.file), responseRequired: true };
+                    },
+                    _a[CommandNames.NavBar] = function (request) {
+                        var navBarArgs = request.arguments;
+                        return { response: _this.getNavigationBarItems(navBarArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.Occurrences] = function (request) {
+                        var _a = request.arguments, line = _a.line, offset = _a.offset, fileName = _a.file;
+                        return { response: _this.getOccurrences(line, offset, fileName), responseRequired: true };
+                    },
+                    _a[CommandNames.DocumentHighlights] = function (request) {
+                        var _a = request.arguments, line = _a.line, offset = _a.offset, fileName = _a.file, filesToSearch = _a.filesToSearch;
+                        return { response: _this.getDocumentHighlights(line, offset, fileName, filesToSearch), responseRequired: true };
+                    },
+                    _a[CommandNames.ProjectInfo] = function (request) {
+                        var _a = request.arguments, file = _a.file, needFileNameList = _a.needFileNameList;
+                        return { response: _this.getProjectInfo(file, needFileNameList), responseRequired: true };
+                    },
+                    _a[CommandNames.ReloadProjects] = function (request) {
+                        _this.reloadProjects();
+                        return { responseRequired: false };
+                    },
+                    _a
+                );
+                this.projectService =
+                    new server.ProjectService(host, logger, function (eventName, project, fileName) {
+                        _this.handleEvent(eventName, project, fileName);
+                    });
+                var _a;
+            }
+            Session.prototype.handleEvent = function (eventName, project, fileName) {
+                var _this = this;
+                if (eventName == "context") {
+                    this.projectService.log("got context event, updating diagnostics for" + fileName, "Info");
+                    this.updateErrorCheck([{ fileName: fileName, project: project }], this.changeSeq, function (n) { return n === _this.changeSeq; }, 100);
+                }
+            };
+            Session.prototype.logError = function (err, cmd) {
+                var typedErr = err;
+                var msg = "Exception on executing command " + cmd;
+                if (typedErr.message) {
+                    msg += ":\n" + typedErr.message;
+                    if (typedErr.stack) {
+                        msg += "\n" + typedErr.stack;
+                    }
+                }
+                this.projectService.log(msg);
+            };
+            Session.prototype.sendLineToClient = function (line) {
+                this.host.write(line + this.host.newLine);
+            };
+            Session.prototype.send = function (msg) {
+                var json = JSON.stringify(msg);
+                if (this.logger.isVerbose()) {
+                    this.logger.info(msg.type + ": " + json);
+                }
+                this.sendLineToClient("Content-Length: " + (1 + this.byteLength(json, "utf8")) +
+                    "\r\n\r\n" + json);
+            };
+            Session.prototype.configFileDiagnosticEvent = function (triggerFile, configFile, diagnostics) {
+                var bakedDiags = ts.map(diagnostics, formatConfigFileDiag);
+                var ev = {
+                    seq: 0,
+                    type: "event",
+                    event: "configFileDiag",
+                    body: {
+                        triggerFile: triggerFile,
+                        configFile: configFile,
+                        diagnostics: bakedDiags
+                    }
+                };
+                this.send(ev);
+            };
+            Session.prototype.event = function (info, eventName) {
+                var ev = {
+                    seq: 0,
+                    type: "event",
+                    event: eventName,
+                    body: info
+                };
+                this.send(ev);
+            };
+            Session.prototype.response = function (info, cmdName, reqSeq, errorMsg) {
+                if (reqSeq === void 0) { reqSeq = 0; }
+                var res = {
+                    seq: 0,
+                    type: "response",
+                    command: cmdName,
+                    request_seq: reqSeq,
+                    success: !errorMsg
+                };
+                if (!errorMsg) {
+                    res.body = info;
+                }
+                else {
+                    res.message = errorMsg;
+                }
+                this.send(res);
+            };
+            Session.prototype.output = function (body, commandName, requestSequence, errorMessage) {
+                if (requestSequence === void 0) { requestSequence = 0; }
+                this.response(body, commandName, requestSequence, errorMessage);
+            };
+            Session.prototype.semanticCheck = function (file, project) {
+                try {
+                    var diags = project.compilerService.languageService.getSemanticDiagnostics(file);
+                    if (diags) {
+                        var bakedDiags = diags.map(function (diag) { return formatDiag(file, project, diag); });
+                        this.event({ file: file, diagnostics: bakedDiags }, "semanticDiag");
+                    }
+                }
+                catch (err) {
+                    this.logError(err, "semantic check");
+                }
+            };
+            Session.prototype.syntacticCheck = function (file, project) {
+                try {
+                    var diags = project.compilerService.languageService.getSyntacticDiagnostics(file);
+                    if (diags) {
+                        var bakedDiags = diags.map(function (diag) { return formatDiag(file, project, diag); });
+                        this.event({ file: file, diagnostics: bakedDiags }, "syntaxDiag");
+                    }
+                }
+                catch (err) {
+                    this.logError(err, "syntactic check");
+                }
+            };
+            Session.prototype.reloadProjects = function () {
+                this.projectService.reloadProjects();
+            };
+            Session.prototype.updateProjectStructure = function (seq, matchSeq, ms) {
+                var _this = this;
+                if (ms === void 0) { ms = 1500; }
+                setTimeout(function () {
+                    if (matchSeq(seq)) {
+                        _this.projectService.updateProjectStructure();
+                    }
+                }, ms);
+            };
+            Session.prototype.updateErrorCheck = function (checkList, seq, matchSeq, ms, followMs, requireOpen) {
+                var _this = this;
+                if (ms === void 0) { ms = 1500; }
+                if (followMs === void 0) { followMs = 200; }
+                if (requireOpen === void 0) { requireOpen = true; }
+                if (followMs > ms) {
+                    followMs = ms;
+                }
+                if (this.errorTimer) {
+                    clearTimeout(this.errorTimer);
+                }
+                if (this.immediateId) {
+                    clearImmediate(this.immediateId);
+                    this.immediateId = undefined;
+                }
+                var index = 0;
+                var checkOne = function () {
+                    if (matchSeq(seq)) {
+                        var checkSpec_1 = checkList[index];
+                        index++;
+                        if (checkSpec_1.project.getSourceFileFromName(checkSpec_1.fileName, requireOpen)) {
+                            _this.syntacticCheck(checkSpec_1.fileName, checkSpec_1.project);
+                            _this.immediateId = setImmediate(function () {
+                                _this.semanticCheck(checkSpec_1.fileName, checkSpec_1.project);
+                                _this.immediateId = undefined;
+                                if (checkList.length > index) {
+                                    _this.errorTimer = setTimeout(checkOne, followMs);
+                                }
+                                else {
+                                    _this.errorTimer = undefined;
+                                }
+                            });
+                        }
+                    }
+                };
+                if ((checkList.length > index) && (matchSeq(seq))) {
+                    this.errorTimer = setTimeout(checkOne, ms);
+                }
+            };
+            Session.prototype.getDefinition = function (line, offset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var definitions = compilerService.languageService.getDefinitionAtPosition(file, position);
+                if (!definitions) {
+                    return undefined;
+                }
+                return definitions.map(function (def) { return ({
+                    file: def.fileName,
+                    start: compilerService.host.positionToLineOffset(def.fileName, def.textSpan.start),
+                    end: compilerService.host.positionToLineOffset(def.fileName, ts.textSpanEnd(def.textSpan))
+                }); });
+            };
+            Session.prototype.getTypeDefinition = function (line, offset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var definitions = compilerService.languageService.getTypeDefinitionAtPosition(file, position);
+                if (!definitions) {
+                    return undefined;
+                }
+                return definitions.map(function (def) { return ({
+                    file: def.fileName,
+                    start: compilerService.host.positionToLineOffset(def.fileName, def.textSpan.start),
+                    end: compilerService.host.positionToLineOffset(def.fileName, ts.textSpanEnd(def.textSpan))
+                }); });
+            };
+            Session.prototype.getOccurrences = function (line, offset, fileName) {
+                fileName = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(fileName);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(fileName, line, offset);
+                var occurrences = compilerService.languageService.getOccurrencesAtPosition(fileName, position);
+                if (!occurrences) {
+                    return undefined;
+                }
+                return occurrences.map(function (occurrence) {
+                    var fileName = occurrence.fileName, isWriteAccess = occurrence.isWriteAccess, textSpan = occurrence.textSpan;
+                    var start = compilerService.host.positionToLineOffset(fileName, textSpan.start);
+                    var end = compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(textSpan));
+                    return {
+                        start: start,
+                        end: end,
+                        file: fileName,
+                        isWriteAccess: isWriteAccess
+                    };
+                });
+            };
+            Session.prototype.getDocumentHighlights = function (line, offset, fileName, filesToSearch) {
+                fileName = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(fileName);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(fileName, line, offset);
+                var documentHighlights = compilerService.languageService.getDocumentHighlights(fileName, position, filesToSearch);
+                if (!documentHighlights) {
+                    return undefined;
+                }
+                return documentHighlights.map(convertToDocumentHighlightsItem);
+                function convertToDocumentHighlightsItem(documentHighlights) {
+                    var fileName = documentHighlights.fileName, highlightSpans = documentHighlights.highlightSpans;
+                    return {
+                        file: fileName,
+                        highlightSpans: highlightSpans.map(convertHighlightSpan)
+                    };
+                    function convertHighlightSpan(highlightSpan) {
+                        var textSpan = highlightSpan.textSpan, kind = highlightSpan.kind;
+                        var start = compilerService.host.positionToLineOffset(fileName, textSpan.start);
+                        var end = compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(textSpan));
+                        return { start: start, end: end, kind: kind };
+                    }
+                }
+            };
+            Session.prototype.getProjectInfo = function (fileName, needFileNameList) {
+                fileName = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(fileName);
+                var projectInfo = {
+                    configFileName: project.projectFilename
+                };
+                if (needFileNameList) {
+                    projectInfo.fileNames = project.getFileNames();
+                }
+                return projectInfo;
+            };
+            Session.prototype.getRenameLocations = function (line, offset, fileName, findInComments, findInStrings) {
+                var file = ts.normalizePath(fileName);
+                var info = this.projectService.getScriptInfo(file);
+                var projects = this.projectService.findReferencingProjects(info);
+                if (!projects.length) {
+                    throw Errors.NoProject;
+                }
+                var defaultProject = projects[0];
+                var defaultProjectCompilerService = defaultProject.compilerService;
+                var position = defaultProjectCompilerService.host.lineOffsetToPosition(file, line, offset);
+                var renameInfo = defaultProjectCompilerService.languageService.getRenameInfo(file, position);
+                if (!renameInfo) {
+                    return undefined;
+                }
+                if (!renameInfo.canRename) {
+                    return {
+                        info: renameInfo,
+                        locs: []
+                    };
+                }
+                var fileSpans = server.combineProjectOutput(projects, function (project) {
+                    var compilerService = project.compilerService;
+                    var renameLocations = compilerService.languageService.findRenameLocations(file, position, findInStrings, findInComments);
+                    if (!renameLocations) {
+                        return [];
+                    }
+                    return renameLocations.map(function (location) { return ({
+                        file: location.fileName,
+                        start: compilerService.host.positionToLineOffset(location.fileName, location.textSpan.start),
+                        end: compilerService.host.positionToLineOffset(location.fileName, ts.textSpanEnd(location.textSpan))
+                    }); });
+                }, compareRenameLocation, function (a, b) { return a.file === b.file && a.start.line === b.start.line && a.start.offset === b.start.offset; });
+                var locs = fileSpans.reduce(function (accum, cur) {
+                    var curFileAccum;
+                    if (accum.length > 0) {
+                        curFileAccum = accum[accum.length - 1];
+                        if (curFileAccum.file !== cur.file) {
+                            curFileAccum = undefined;
+                        }
+                    }
+                    if (!curFileAccum) {
+                        curFileAccum = { file: cur.file, locs: [] };
+                        accum.push(curFileAccum);
+                    }
+                    curFileAccum.locs.push({ start: cur.start, end: cur.end });
+                    return accum;
+                }, []);
+                return { info: renameInfo, locs: locs };
+                function compareRenameLocation(a, b) {
+                    if (a.file < b.file) {
+                        return -1;
+                    }
+                    else if (a.file > b.file) {
+                        return 1;
+                    }
+                    else {
+                        if (a.start.line < b.start.line) {
+                            return 1;
+                        }
+                        else if (a.start.line > b.start.line) {
+                            return -1;
+                        }
+                        else {
+                            return b.start.offset - a.start.offset;
+                        }
+                    }
+                }
+            };
+            Session.prototype.getReferences = function (line, offset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var info = this.projectService.getScriptInfo(file);
+                var projects = this.projectService.findReferencingProjects(info);
+                if (!projects.length) {
+                    throw Errors.NoProject;
+                }
+                var defaultProject = projects[0];
+                var position = defaultProject.compilerService.host.lineOffsetToPosition(file, line, offset);
+                var nameInfo = defaultProject.compilerService.languageService.getQuickInfoAtPosition(file, position);
+                if (!nameInfo) {
+                    return undefined;
+                }
+                var displayString = ts.displayPartsToString(nameInfo.displayParts);
+                var nameSpan = nameInfo.textSpan;
+                var nameColStart = defaultProject.compilerService.host.positionToLineOffset(file, nameSpan.start).offset;
+                var nameText = defaultProject.compilerService.host.getScriptSnapshot(file).getText(nameSpan.start, ts.textSpanEnd(nameSpan));
+                var refs = server.combineProjectOutput(projects, function (project) {
+                    var compilerService = project.compilerService;
+                    var references = compilerService.languageService.getReferencesAtPosition(file, position);
+                    if (!references) {
+                        return [];
+                    }
+                    return references.map(function (ref) {
+                        var start = compilerService.host.positionToLineOffset(ref.fileName, ref.textSpan.start);
+                        var refLineSpan = compilerService.host.lineToTextSpan(ref.fileName, start.line - 1);
+                        var snap = compilerService.host.getScriptSnapshot(ref.fileName);
+                        var lineText = snap.getText(refLineSpan.start, ts.textSpanEnd(refLineSpan)).replace(/\r|\n/g, "");
+                        return {
+                            file: ref.fileName,
+                            start: start,
+                            lineText: lineText,
+                            end: compilerService.host.positionToLineOffset(ref.fileName, ts.textSpanEnd(ref.textSpan)),
+                            isWriteAccess: ref.isWriteAccess
+                        };
+                    });
+                }, compareFileStart, areReferencesResponseItemsForTheSameLocation);
+                return {
+                    refs: refs,
+                    symbolName: nameText,
+                    symbolStartOffset: nameColStart,
+                    symbolDisplayString: displayString
+                };
+                function areReferencesResponseItemsForTheSameLocation(a, b) {
+                    if (a && b) {
+                        return a.file === b.file &&
+                            a.start === b.start &&
+                            a.end === b.end;
+                    }
+                    return false;
+                }
+            };
+            Session.prototype.openClientFile = function (fileName, fileContent, scriptKind) {
+                var file = ts.normalizePath(fileName);
+                var _a = this.projectService.openClientFile(file, fileContent, scriptKind), configFileName = _a.configFileName, configFileErrors = _a.configFileErrors;
+                if (configFileErrors) {
+                    this.configFileDiagnosticEvent(fileName, configFileName, configFileErrors);
+                }
+            };
+            Session.prototype.getQuickInfo = function (line, offset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var quickInfo = compilerService.languageService.getQuickInfoAtPosition(file, position);
+                if (!quickInfo) {
+                    return undefined;
+                }
+                var displayString = ts.displayPartsToString(quickInfo.displayParts);
+                var docString = ts.displayPartsToString(quickInfo.documentation);
+                return {
+                    kind: quickInfo.kind,
+                    kindModifiers: quickInfo.kindModifiers,
+                    start: compilerService.host.positionToLineOffset(file, quickInfo.textSpan.start),
+                    end: compilerService.host.positionToLineOffset(file, ts.textSpanEnd(quickInfo.textSpan)),
+                    displayString: displayString,
+                    documentation: docString
+                };
+            };
+            Session.prototype.getFormattingEditsForRange = function (line, offset, endLine, endOffset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var startPosition = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var endPosition = compilerService.host.lineOffsetToPosition(file, endLine, endOffset);
+                var edits = compilerService.languageService.getFormattingEditsForRange(file, startPosition, endPosition, this.projectService.getFormatCodeOptions(file));
+                if (!edits) {
+                    return undefined;
+                }
+                return edits.map(function (edit) {
+                    return {
+                        start: compilerService.host.positionToLineOffset(file, edit.span.start),
+                        end: compilerService.host.positionToLineOffset(file, ts.textSpanEnd(edit.span)),
+                        newText: edit.newText ? edit.newText : ""
+                    };
+                });
+            };
+            Session.prototype.getFormattingEditsAfterKeystroke = function (line, offset, key, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var formatOptions = this.projectService.getFormatCodeOptions(file);
+                var edits = compilerService.languageService.getFormattingEditsAfterKeystroke(file, position, key, formatOptions);
+                if ((key == "\n") && ((!edits) || (edits.length === 0) || allEditsBeforePos(edits, position))) {
+                    var scriptInfo = compilerService.host.getScriptInfo(file);
+                    if (scriptInfo) {
+                        var lineInfo = scriptInfo.getLineInfo(line);
+                        if (lineInfo && (lineInfo.leaf) && (lineInfo.leaf.text)) {
+                            var lineText = lineInfo.leaf.text;
+                            if (lineText.search("\\S") < 0) {
+                                var editorOptions = {
+                                    IndentSize: formatOptions.IndentSize,
+                                    TabSize: formatOptions.TabSize,
+                                    NewLineCharacter: formatOptions.NewLineCharacter,
+                                    ConvertTabsToSpaces: formatOptions.ConvertTabsToSpaces,
+                                    IndentStyle: ts.IndentStyle.Smart
+                                };
+                                var preferredIndent = compilerService.languageService.getIndentationAtPosition(file, position, editorOptions);
+                                var hasIndent = 0;
+                                var i = void 0, len = void 0;
+                                for (i = 0, len = lineText.length; i < len; i++) {
+                                    if (lineText.charAt(i) == " ") {
+                                        hasIndent++;
+                                    }
+                                    else if (lineText.charAt(i) == "\t") {
+                                        hasIndent += editorOptions.TabSize;
+                                    }
+                                    else {
+                                        break;
+                                    }
+                                }
+                                if (preferredIndent !== hasIndent) {
+                                    var firstNoWhiteSpacePosition = lineInfo.offset + i;
+                                    edits.push({
+                                        span: ts.createTextSpanFromBounds(lineInfo.offset, firstNoWhiteSpacePosition),
+                                        newText: generateIndentString(preferredIndent, editorOptions)
+                                    });
+                                }
+                            }
+                        }
+                    }
+                }
+                if (!edits) {
+                    return undefined;
+                }
+                return edits.map(function (edit) {
+                    return {
+                        start: compilerService.host.positionToLineOffset(file, edit.span.start),
+                        end: compilerService.host.positionToLineOffset(file, ts.textSpanEnd(edit.span)),
+                        newText: edit.newText ? edit.newText : ""
+                    };
+                });
+            };
+            Session.prototype.getCompletions = function (line, offset, prefix, fileName) {
+                if (!prefix) {
+                    prefix = "";
+                }
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var completions = compilerService.languageService.getCompletionsAtPosition(file, position);
+                if (!completions) {
+                    return undefined;
+                }
+                return completions.entries.reduce(function (result, entry) {
+                    if (completions.isMemberCompletion || (entry.name.toLowerCase().indexOf(prefix.toLowerCase()) === 0)) {
+                        result.push(entry);
+                    }
+                    return result;
+                }, []).sort(function (a, b) { return a.name.localeCompare(b.name); });
+            };
+            Session.prototype.getCompletionEntryDetails = function (line, offset, entryNames, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                return entryNames.reduce(function (accum, entryName) {
+                    var details = compilerService.languageService.getCompletionEntryDetails(file, position, entryName);
+                    if (details) {
+                        accum.push(details);
+                    }
+                    return accum;
+                }, []);
+            };
+            Session.prototype.getSignatureHelpItems = function (line, offset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var helpItems = compilerService.languageService.getSignatureHelpItems(file, position);
+                if (!helpItems) {
+                    return undefined;
+                }
+                var span = helpItems.applicableSpan;
+                var result = {
+                    items: helpItems.items,
+                    applicableSpan: {
+                        start: compilerService.host.positionToLineOffset(file, span.start),
+                        end: compilerService.host.positionToLineOffset(file, span.start + span.length)
+                    },
+                    selectedItemIndex: helpItems.selectedItemIndex,
+                    argumentIndex: helpItems.argumentIndex,
+                    argumentCount: helpItems.argumentCount
+                };
+                return result;
+            };
+            Session.prototype.getDiagnostics = function (delay, fileNames) {
+                var _this = this;
+                var checkList = fileNames.reduce(function (accum, fileName) {
+                    fileName = ts.normalizePath(fileName);
+                    var project = _this.projectService.getProjectForFile(fileName);
+                    if (project) {
+                        accum.push({ fileName: fileName, project: project });
+                    }
+                    return accum;
+                }, []);
+                if (checkList.length > 0) {
+                    this.updateErrorCheck(checkList, this.changeSeq, function (n) { return n === _this.changeSeq; }, delay);
+                }
+            };
+            Session.prototype.change = function (line, offset, endLine, endOffset, insertString, fileName) {
+                var _this = this;
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (project) {
+                    var compilerService = project.compilerService;
+                    var start = compilerService.host.lineOffsetToPosition(file, line, offset);
+                    var end = compilerService.host.lineOffsetToPosition(file, endLine, endOffset);
+                    if (start >= 0) {
+                        compilerService.host.editScript(file, start, end, insertString);
+                        this.changeSeq++;
+                    }
+                    this.updateProjectStructure(this.changeSeq, function (n) { return n === _this.changeSeq; });
+                }
+            };
+            Session.prototype.reload = function (fileName, tempFileName, reqSeq) {
+                var _this = this;
+                if (reqSeq === void 0) { reqSeq = 0; }
+                var file = ts.normalizePath(fileName);
+                var tmpfile = ts.normalizePath(tempFileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (project) {
+                    this.changeSeq++;
+                    project.compilerService.host.reloadScript(file, tmpfile, function () {
+                        _this.output(undefined, CommandNames.Reload, reqSeq);
+                    });
+                }
+            };
+            Session.prototype.saveToTmp = function (fileName, tempFileName) {
+                var file = ts.normalizePath(fileName);
+                var tmpfile = ts.normalizePath(tempFileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (project) {
+                    project.compilerService.host.saveTo(file, tmpfile);
+                }
+            };
+            Session.prototype.closeClientFile = function (fileName) {
+                if (!fileName) {
+                    return;
+                }
+                var file = ts.normalizePath(fileName);
+                this.projectService.closeClientFile(file);
+            };
+            Session.prototype.decorateNavigationBarItem = function (project, fileName, items) {
+                var _this = this;
+                if (!items) {
+                    return undefined;
+                }
+                var compilerService = project.compilerService;
+                return items.map(function (item) { return ({
+                    text: item.text,
+                    kind: item.kind,
+                    kindModifiers: item.kindModifiers,
+                    spans: item.spans.map(function (span) { return ({
+                        start: compilerService.host.positionToLineOffset(fileName, span.start),
+                        end: compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(span))
+                    }); }),
+                    childItems: _this.decorateNavigationBarItem(project, fileName, item.childItems),
+                    indent: item.indent
+                }); });
+            };
+            Session.prototype.getNavigationBarItems = function (fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var items = compilerService.languageService.getNavigationBarItems(file);
+                if (!items) {
+                    return undefined;
+                }
+                return this.decorateNavigationBarItem(project, fileName, items);
+            };
+            Session.prototype.getNavigateToItems = function (searchValue, fileName, maxResultCount) {
+                var file = ts.normalizePath(fileName);
+                var info = this.projectService.getScriptInfo(file);
+                var projects = this.projectService.findReferencingProjects(info);
+                var defaultProject = projects[0];
+                if (!defaultProject) {
+                    throw Errors.NoProject;
+                }
+                var allNavToItems = server.combineProjectOutput(projects, function (project) {
+                    var compilerService = project.compilerService;
+                    var navItems = compilerService.languageService.getNavigateToItems(searchValue, maxResultCount);
+                    if (!navItems) {
+                        return [];
+                    }
+                    return navItems.map(function (navItem) {
+                        var start = compilerService.host.positionToLineOffset(navItem.fileName, navItem.textSpan.start);
+                        var end = compilerService.host.positionToLineOffset(navItem.fileName, ts.textSpanEnd(navItem.textSpan));
+                        var bakedItem = {
+                            name: navItem.name,
+                            kind: navItem.kind,
+                            file: navItem.fileName,
+                            start: start,
+                            end: end
+                        };
+                        if (navItem.kindModifiers && (navItem.kindModifiers !== "")) {
+                            bakedItem.kindModifiers = navItem.kindModifiers;
+                        }
+                        if (navItem.matchKind !== "none") {
+                            bakedItem.matchKind = navItem.matchKind;
+                        }
+                        if (navItem.containerName && (navItem.containerName.length > 0)) {
+                            bakedItem.containerName = navItem.containerName;
+                        }
+                        if (navItem.containerKind && (navItem.containerKind.length > 0)) {
+                            bakedItem.containerKind = navItem.containerKind;
+                        }
+                        return bakedItem;
+                    });
+                }, undefined, areNavToItemsForTheSameLocation);
+                return allNavToItems;
+                function areNavToItemsForTheSameLocation(a, b) {
+                    if (a && b) {
+                        return a.file === b.file &&
+                            a.start === b.start &&
+                            a.end === b.end;
+                    }
+                    return false;
+                }
+            };
+            Session.prototype.getBraceMatching = function (line, offset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var spans = compilerService.languageService.getBraceMatchingAtPosition(file, position);
+                if (!spans) {
+                    return undefined;
+                }
+                return spans.map(function (span) { return ({
+                    start: compilerService.host.positionToLineOffset(file, span.start),
+                    end: compilerService.host.positionToLineOffset(file, span.start + span.length)
+                }); });
+            };
+            Session.prototype.getDiagnosticsForProject = function (delay, fileName) {
+                var _this = this;
+                var fileNames = this.getProjectInfo(fileName, true).fileNames;
+                var fileNamesInProject = fileNames.filter(function (value, index, array) { return value.indexOf("lib.d.ts") < 0; });
+                var highPriorityFiles = [];
+                var mediumPriorityFiles = [];
+                var lowPriorityFiles = [];
+                var veryLowPriorityFiles = [];
+                var normalizedFileName = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(normalizedFileName);
+                for (var _i = 0, fileNamesInProject_1 = fileNamesInProject; _i < fileNamesInProject_1.length; _i++) {
+                    var fileNameInProject = fileNamesInProject_1[_i];
+                    if (this.getCanonicalFileName(fileNameInProject) == this.getCanonicalFileName(fileName))
+                        highPriorityFiles.push(fileNameInProject);
+                    else {
+                        var info = this.projectService.getScriptInfo(fileNameInProject);
+                        if (!info.isOpen) {
+                            if (fileNameInProject.indexOf(".d.ts") > 0)
+                                veryLowPriorityFiles.push(fileNameInProject);
+                            else
+                                lowPriorityFiles.push(fileNameInProject);
+                        }
+                        else
+                            mediumPriorityFiles.push(fileNameInProject);
+                    }
+                }
+                fileNamesInProject = highPriorityFiles.concat(mediumPriorityFiles).concat(lowPriorityFiles).concat(veryLowPriorityFiles);
+                if (fileNamesInProject.length > 0) {
+                    var checkList = fileNamesInProject.map(function (fileName) {
+                        var normalizedFileName = ts.normalizePath(fileName);
+                        return { fileName: normalizedFileName, project: project };
+                    });
+                    this.updateErrorCheck(checkList, this.changeSeq, function (n) { return n == _this.changeSeq; }, delay, 200, false);
+                }
+            };
+            Session.prototype.getCanonicalFileName = function (fileName) {
+                var name = this.host.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
+                return ts.normalizePath(name);
+            };
+            Session.prototype.exit = function () {
+            };
+            Session.prototype.addProtocolHandler = function (command, handler) {
+                if (this.handlers[command]) {
+                    throw new Error("Protocol handler already exists for command \"" + command + "\"");
+                }
+                this.handlers[command] = handler;
+            };
+            Session.prototype.executeCommand = function (request) {
+                var handler = this.handlers[request.command];
+                if (handler) {
+                    return handler(request);
+                }
+                else {
+                    this.projectService.log("Unrecognized JSON command: " + JSON.stringify(request));
+                    this.output(undefined, CommandNames.Unknown, request.seq, "Unrecognized JSON command: " + request.command);
+                    return { responseRequired: false };
+                }
+            };
+            Session.prototype.onMessage = function (message) {
+                var start;
+                if (this.logger.isVerbose()) {
+                    this.logger.info("request: " + message);
+                    start = this.hrtime();
+                }
+                var request;
+                try {
+                    request = JSON.parse(message);
+                    var _a = this.executeCommand(request), response = _a.response, responseRequired = _a.responseRequired;
+                    if (this.logger.isVerbose()) {
+                        var elapsed = this.hrtime(start);
+                        var seconds = elapsed[0];
+                        var nanoseconds = elapsed[1];
+                        var elapsedMs = ((1e9 * seconds) + nanoseconds) / 1000000.0;
+                        var leader = "Elapsed time (in milliseconds)";
+                        if (!responseRequired) {
+                            leader = "Async elapsed time (in milliseconds)";
+                        }
+                        this.logger.msg(leader + ": " + elapsedMs.toFixed(4).toString(), "Perf");
+                    }
+                    if (response) {
+                        this.output(response, request.command, request.seq);
+                    }
+                    else if (responseRequired) {
+                        this.output(undefined, request.command, request.seq, "No content available.");
+                    }
+                }
+                catch (err) {
+                    if (err instanceof ts.OperationCanceledException) {
+                    }
+                    this.logError(err, message);
+                    this.output(undefined, request ? request.command : CommandNames.Unknown, request ? request.seq : 0, "Error processing request. " + err.message + "\n" + err.stack);
+                }
+            };
+            return Session;
+        }());
+        server.Session = Session;
+    })(server = ts.server || (ts.server = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var server;
+    (function (server) {
+        var lineCollectionCapacity = 4;
+        function mergeFormatOptions(formatCodeOptions, formatOptions) {
+            var hasOwnProperty = Object.prototype.hasOwnProperty;
+            Object.keys(formatOptions).forEach(function (key) {
+                var codeKey = key.charAt(0).toUpperCase() + key.substring(1);
+                if (hasOwnProperty.call(formatCodeOptions, codeKey)) {
+                    formatCodeOptions[codeKey] = formatOptions[key];
+                }
+            });
+        }
+        var ScriptInfo = (function () {
+            function ScriptInfo(host, fileName, content, isOpen) {
+                if (isOpen === void 0) { isOpen = false; }
+                this.host = host;
+                this.fileName = fileName;
+                this.content = content;
+                this.isOpen = isOpen;
+                this.children = [];
+                this.formatCodeOptions = ts.clone(CompilerService.getDefaultFormatCodeOptions(this.host));
+                this.path = ts.toPath(fileName, host.getCurrentDirectory(), ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames));
+                this.svc = ScriptVersionCache.fromString(host, content);
+            }
+            ScriptInfo.prototype.setFormatOptions = function (formatOptions) {
+                if (formatOptions) {
+                    mergeFormatOptions(this.formatCodeOptions, formatOptions);
+                }
+            };
+            ScriptInfo.prototype.close = function () {
+                this.isOpen = false;
+            };
+            ScriptInfo.prototype.addChild = function (childInfo) {
+                this.children.push(childInfo);
+            };
+            ScriptInfo.prototype.snap = function () {
+                return this.svc.getSnapshot();
+            };
+            ScriptInfo.prototype.getText = function () {
+                var snap = this.snap();
+                return snap.getText(0, snap.getLength());
+            };
+            ScriptInfo.prototype.getLineInfo = function (line) {
+                var snap = this.snap();
+                return snap.index.lineNumberToInfo(line);
+            };
+            ScriptInfo.prototype.editContent = function (start, end, newText) {
+                this.svc.edit(start, end - start, newText);
+            };
+            ScriptInfo.prototype.getTextChangeRangeBetweenVersions = function (startVersion, endVersion) {
+                return this.svc.getTextChangesBetweenVersions(startVersion, endVersion);
+            };
+            ScriptInfo.prototype.getChangeRange = function (oldSnapshot) {
+                return this.snap().getChangeRange(oldSnapshot);
+            };
+            return ScriptInfo;
+        }());
+        server.ScriptInfo = ScriptInfo;
+        var LSHost = (function () {
+            function LSHost(host, project) {
+                var _this = this;
+                this.host = host;
+                this.project = project;
+                this.roots = [];
+                this.getCanonicalFileName = ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames);
+                this.resolvedModuleNames = ts.createFileMap();
+                this.resolvedTypeReferenceDirectives = ts.createFileMap();
+                this.filenameToScript = ts.createFileMap();
+                this.moduleResolutionHost = {
+                    fileExists: function (fileName) { return _this.fileExists(fileName); },
+                    readFile: function (fileName) { return _this.host.readFile(fileName); },
+                    directoryExists: function (directoryName) { return _this.host.directoryExists(directoryName); }
+                };
+            }
+            LSHost.prototype.resolveNamesWithLocalCache = function (names, containingFile, cache, loader, getResult) {
+                var path = ts.toPath(containingFile, this.host.getCurrentDirectory(), this.getCanonicalFileName);
+                var currentResolutionsInFile = cache.get(path);
+                var newResolutions = {};
+                var resolvedModules = [];
+                var compilerOptions = this.getCompilationSettings();
+                for (var _i = 0, names_2 = names; _i < names_2.length; _i++) {
+                    var name_42 = names_2[_i];
+                    var resolution = ts.lookUp(newResolutions, name_42);
+                    if (!resolution) {
+                        var existingResolution = currentResolutionsInFile && ts.lookUp(currentResolutionsInFile, name_42);
+                        if (moduleResolutionIsValid(existingResolution)) {
+                            resolution = existingResolution;
+                        }
+                        else {
+                            resolution = loader(name_42, containingFile, compilerOptions, this.moduleResolutionHost);
+                            resolution.lastCheckTime = Date.now();
+                            newResolutions[name_42] = resolution;
+                        }
+                    }
+                    ts.Debug.assert(resolution !== undefined);
+                    resolvedModules.push(getResult(resolution));
+                }
+                cache.set(path, newResolutions);
+                return resolvedModules;
+                function moduleResolutionIsValid(resolution) {
+                    if (!resolution) {
+                        return false;
+                    }
+                    if (getResult(resolution)) {
+                        return true;
+                    }
+                    return resolution.failedLookupLocations.length === 0;
+                }
+            };
+            LSHost.prototype.resolveTypeReferenceDirectives = function (typeDirectiveNames, containingFile) {
+                return this.resolveNamesWithLocalCache(typeDirectiveNames, containingFile, this.resolvedTypeReferenceDirectives, ts.resolveTypeReferenceDirective, function (m) { return m.resolvedTypeReferenceDirective; });
+            };
+            LSHost.prototype.resolveModuleNames = function (moduleNames, containingFile) {
+                return this.resolveNamesWithLocalCache(moduleNames, containingFile, this.resolvedModuleNames, ts.resolveModuleName, function (m) { return m.resolvedModule; });
+            };
+            LSHost.prototype.getDefaultLibFileName = function () {
+                var nodeModuleBinDir = ts.getDirectoryPath(ts.normalizePath(this.host.getExecutingFilePath()));
+                return ts.combinePaths(nodeModuleBinDir, ts.getDefaultLibFileName(this.compilationSettings));
+            };
+            LSHost.prototype.getScriptSnapshot = function (filename) {
+                var scriptInfo = this.getScriptInfo(filename);
+                if (scriptInfo) {
+                    return scriptInfo.snap();
+                }
+            };
+            LSHost.prototype.setCompilationSettings = function (opt) {
+                this.compilationSettings = opt;
+                this.resolvedModuleNames.clear();
+                this.resolvedTypeReferenceDirectives.clear();
+            };
+            LSHost.prototype.lineAffectsRefs = function (filename, line) {
+                var info = this.getScriptInfo(filename);
+                var lineInfo = info.getLineInfo(line);
+                if (lineInfo && lineInfo.text) {
+                    var regex = /reference|import|\/\*|\*\//;
+                    return regex.test(lineInfo.text);
+                }
+            };
+            LSHost.prototype.getCompilationSettings = function () {
+                return this.compilationSettings;
+            };
+            LSHost.prototype.getScriptFileNames = function () {
+                return this.roots.map(function (root) { return root.fileName; });
+            };
+            LSHost.prototype.getScriptKind = function (fileName) {
+                var info = this.getScriptInfo(fileName);
+                if (!info) {
+                    return undefined;
+                }
+                if (!info.scriptKind) {
+                    info.scriptKind = ts.getScriptKindFromFileName(fileName);
+                }
+                return info.scriptKind;
+            };
+            LSHost.prototype.getScriptVersion = function (filename) {
+                return this.getScriptInfo(filename).svc.latestVersion().toString();
+            };
+            LSHost.prototype.getCurrentDirectory = function () {
+                return "";
+            };
+            LSHost.prototype.getScriptIsOpen = function (filename) {
+                return this.getScriptInfo(filename).isOpen;
+            };
+            LSHost.prototype.removeReferencedFile = function (info) {
+                if (!info.isOpen) {
+                    this.filenameToScript.remove(info.path);
+                    this.resolvedModuleNames.remove(info.path);
+                    this.resolvedTypeReferenceDirectives.remove(info.path);
+                }
+            };
+            LSHost.prototype.getScriptInfo = function (filename) {
+                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
+                var scriptInfo = this.filenameToScript.get(path);
+                if (!scriptInfo) {
+                    scriptInfo = this.project.openReferencedFile(filename);
+                    if (scriptInfo) {
+                        this.filenameToScript.set(path, scriptInfo);
+                    }
+                }
+                return scriptInfo;
+            };
+            LSHost.prototype.addRoot = function (info) {
+                if (!this.filenameToScript.contains(info.path)) {
+                    this.filenameToScript.set(info.path, info);
+                    this.roots.push(info);
+                }
+            };
+            LSHost.prototype.removeRoot = function (info) {
+                if (this.filenameToScript.contains(info.path)) {
+                    this.filenameToScript.remove(info.path);
+                    this.roots = copyListRemovingItem(info, this.roots);
+                    this.resolvedModuleNames.remove(info.path);
+                    this.resolvedTypeReferenceDirectives.remove(info.path);
+                }
+            };
+            LSHost.prototype.saveTo = function (filename, tmpfilename) {
+                var script = this.getScriptInfo(filename);
+                if (script) {
+                    var snap = script.snap();
+                    this.host.writeFile(tmpfilename, snap.getText(0, snap.getLength()));
+                }
+            };
+            LSHost.prototype.reloadScript = function (filename, tmpfilename, cb) {
+                var script = this.getScriptInfo(filename);
+                if (script) {
+                    script.svc.reloadFromFile(tmpfilename, cb);
+                }
+            };
+            LSHost.prototype.editScript = function (filename, start, end, newText) {
+                var script = this.getScriptInfo(filename);
+                if (script) {
+                    script.editContent(start, end, newText);
+                    return;
+                }
+                throw new Error("No script with name '" + filename + "'");
+            };
+            LSHost.prototype.resolvePath = function (path) {
+                var result = this.host.resolvePath(path);
+                return result;
+            };
+            LSHost.prototype.fileExists = function (path) {
+                var result = this.host.fileExists(path);
+                return result;
+            };
+            LSHost.prototype.directoryExists = function (path) {
+                return this.host.directoryExists(path);
+            };
+            LSHost.prototype.lineToTextSpan = function (filename, line) {
+                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
+                var script = this.filenameToScript.get(path);
+                var index = script.snap().index;
+                var lineInfo = index.lineNumberToInfo(line + 1);
+                var len;
+                if (lineInfo.leaf) {
+                    len = lineInfo.leaf.text.length;
+                }
+                else {
+                    var nextLineInfo = index.lineNumberToInfo(line + 2);
+                    len = nextLineInfo.offset - lineInfo.offset;
+                }
+                return ts.createTextSpan(lineInfo.offset, len);
+            };
+            LSHost.prototype.lineOffsetToPosition = function (filename, line, offset) {
+                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
+                var script = this.filenameToScript.get(path);
+                var index = script.snap().index;
+                var lineInfo = index.lineNumberToInfo(line);
+                return (lineInfo.offset + offset - 1);
+            };
+            LSHost.prototype.positionToLineOffset = function (filename, position) {
+                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
+                var script = this.filenameToScript.get(path);
+                var index = script.snap().index;
+                var lineOffset = index.charOffsetToLineNumberAndPos(position);
+                return { line: lineOffset.line, offset: lineOffset.offset + 1 };
+            };
+            return LSHost;
+        }());
+        server.LSHost = LSHost;
+        var Project = (function () {
+            function Project(projectService, projectOptions) {
+                this.projectService = projectService;
+                this.projectOptions = projectOptions;
+                this.directoriesWatchedForTsconfig = [];
+                this.filenameToSourceFile = {};
+                this.updateGraphSeq = 0;
+                this.openRefCount = 0;
+                if (projectOptions && projectOptions.files) {
+                    projectOptions.compilerOptions.allowNonTsExtensions = true;
+                }
+                this.compilerService = new CompilerService(this, projectOptions && projectOptions.compilerOptions);
+            }
+            Project.prototype.addOpenRef = function () {
+                this.openRefCount++;
+            };
+            Project.prototype.deleteOpenRef = function () {
+                this.openRefCount--;
+                return this.openRefCount;
+            };
+            Project.prototype.openReferencedFile = function (filename) {
+                return this.projectService.openFile(filename, false);
+            };
+            Project.prototype.getRootFiles = function () {
+                return this.compilerService.host.roots.map(function (info) { return info.fileName; });
+            };
+            Project.prototype.getFileNames = function () {
+                var sourceFiles = this.program.getSourceFiles();
+                return sourceFiles.map(function (sourceFile) { return sourceFile.fileName; });
+            };
+            Project.prototype.getSourceFile = function (info) {
+                return this.filenameToSourceFile[info.fileName];
+            };
+            Project.prototype.getSourceFileFromName = function (filename, requireOpen) {
+                var info = this.projectService.getScriptInfo(filename);
+                if (info) {
+                    if ((!requireOpen) || info.isOpen) {
+                        return this.getSourceFile(info);
+                    }
+                }
+            };
+            Project.prototype.isRoot = function (info) {
+                return this.compilerService.host.roots.some(function (root) { return root === info; });
+            };
+            Project.prototype.removeReferencedFile = function (info) {
+                this.compilerService.host.removeReferencedFile(info);
+                this.updateGraph();
+            };
+            Project.prototype.updateFileMap = function () {
+                this.filenameToSourceFile = {};
+                var sourceFiles = this.program.getSourceFiles();
+                for (var i = 0, len = sourceFiles.length; i < len; i++) {
+                    var normFilename = ts.normalizePath(sourceFiles[i].fileName);
+                    this.filenameToSourceFile[normFilename] = sourceFiles[i];
+                }
+            };
+            Project.prototype.finishGraph = function () {
+                this.updateGraph();
+                this.compilerService.languageService.getNavigateToItems(".*");
+            };
+            Project.prototype.updateGraph = function () {
+                this.program = this.compilerService.languageService.getProgram();
+                this.updateFileMap();
+            };
+            Project.prototype.isConfiguredProject = function () {
+                return this.projectFilename;
+            };
+            Project.prototype.addRoot = function (info) {
+                this.compilerService.host.addRoot(info);
+            };
+            Project.prototype.removeRoot = function (info) {
+                this.compilerService.host.removeRoot(info);
+            };
+            Project.prototype.filesToString = function () {
+                var strBuilder = "";
+                ts.forEachValue(this.filenameToSourceFile, function (sourceFile) { strBuilder += sourceFile.fileName + "\n"; });
+                return strBuilder;
+            };
+            Project.prototype.setProjectOptions = function (projectOptions) {
+                this.projectOptions = projectOptions;
+                if (projectOptions.compilerOptions) {
+                    projectOptions.compilerOptions.allowNonTsExtensions = true;
+                    this.compilerService.setCompilerOptions(projectOptions.compilerOptions);
+                }
+            };
+            return Project;
+        }());
+        server.Project = Project;
+        function copyListRemovingItem(item, list) {
+            var copiedList = [];
+            for (var i = 0, len = list.length; i < len; i++) {
+                if (list[i] != item) {
+                    copiedList.push(list[i]);
+                }
+            }
+            return copiedList;
+        }
+        function combineProjectOutput(projects, action, comparer, areEqual) {
+            var result = projects.reduce(function (previous, current) { return ts.concatenate(previous, action(current)); }, []).sort(comparer);
+            return projects.length > 1 ? ts.deduplicate(result, areEqual) : result;
+        }
+        server.combineProjectOutput = combineProjectOutput;
+        var ProjectService = (function () {
+            function ProjectService(host, psLogger, eventHandler) {
+                this.host = host;
+                this.psLogger = psLogger;
+                this.eventHandler = eventHandler;
+                this.filenameToScriptInfo = {};
+                this.openFileRoots = [];
+                this.inferredProjects = [];
+                this.configuredProjects = [];
+                this.openFilesReferenced = [];
+                this.openFileRootsConfigured = [];
+                this.directoryWatchersForTsconfig = {};
+                this.directoryWatchersRefCount = {};
+                this.timerForDetectingProjectFileListChanges = {};
+                this.addDefaultHostConfiguration();
+            }
+            ProjectService.prototype.addDefaultHostConfiguration = function () {
+                this.hostConfiguration = {
+                    formatCodeOptions: ts.clone(CompilerService.getDefaultFormatCodeOptions(this.host)),
+                    hostInfo: "Unknown host"
+                };
+            };
+            ProjectService.prototype.getFormatCodeOptions = function (file) {
+                if (file) {
+                    var info = this.filenameToScriptInfo[file];
+                    if (info) {
+                        return info.formatCodeOptions;
+                    }
+                }
+                return this.hostConfiguration.formatCodeOptions;
+            };
+            ProjectService.prototype.watchedFileChanged = function (fileName) {
+                var info = this.filenameToScriptInfo[fileName];
+                if (!info) {
+                    this.psLogger.info("Error: got watch notification for unknown file: " + fileName);
+                }
+                if (!this.host.fileExists(fileName)) {
+                    this.fileDeletedInFilesystem(info);
+                }
+                else {
+                    if (info && (!info.isOpen)) {
+                        info.svc.reloadFromFile(info.fileName);
+                    }
+                }
+            };
+            ProjectService.prototype.directoryWatchedForSourceFilesChanged = function (project, fileName) {
+                if (fileName && !ts.isSupportedSourceFileName(fileName, project.projectOptions ? project.projectOptions.compilerOptions : undefined)) {
+                    return;
+                }
+                this.log("Detected source file changes: " + fileName);
+                this.startTimerForDetectingProjectFileListChanges(project);
+            };
+            ProjectService.prototype.startTimerForDetectingProjectFileListChanges = function (project) {
+                var _this = this;
+                if (this.timerForDetectingProjectFileListChanges[project.projectFilename]) {
+                    this.host.clearTimeout(this.timerForDetectingProjectFileListChanges[project.projectFilename]);
+                }
+                this.timerForDetectingProjectFileListChanges[project.projectFilename] = this.host.setTimeout(function () { return _this.handleProjectFileListChanges(project); }, 250);
+            };
+            ProjectService.prototype.handleProjectFileListChanges = function (project) {
+                var _this = this;
+                var projectOptions = this.configFileToProjectOptions(project.projectFilename).projectOptions;
+                var newRootFiles = projectOptions.files.map((function (f) { return _this.getCanonicalFileName(f); }));
+                var currentRootFiles = project.getRootFiles().map((function (f) { return _this.getCanonicalFileName(f); }));
+                if (!ts.arrayIsEqualTo(currentRootFiles && currentRootFiles.sort(), newRootFiles && newRootFiles.sort())) {
+                    this.updateConfiguredProject(project);
+                    this.updateProjectStructure();
+                }
+            };
+            ProjectService.prototype.directoryWatchedForTsconfigChanged = function (fileName) {
+                var _this = this;
+                if (ts.getBaseFileName(fileName) != "tsconfig.json") {
+                    this.log(fileName + " is not tsconfig.json");
+                    return;
+                }
+                this.log("Detected newly added tsconfig file: " + fileName);
+                var projectOptions = this.configFileToProjectOptions(fileName).projectOptions;
+                var rootFilesInTsconfig = projectOptions.files.map(function (f) { return _this.getCanonicalFileName(f); });
+                var openFileRoots = this.openFileRoots.map(function (s) { return _this.getCanonicalFileName(s.fileName); });
+                for (var _i = 0, openFileRoots_1 = openFileRoots; _i < openFileRoots_1.length; _i++) {
+                    var openFileRoot = openFileRoots_1[_i];
+                    if (rootFilesInTsconfig.indexOf(openFileRoot) >= 0) {
+                        this.reloadProjects();
+                        return;
+                    }
+                }
+            };
+            ProjectService.prototype.getCanonicalFileName = function (fileName) {
+                var name = this.host.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
+                return ts.normalizePath(name);
+            };
+            ProjectService.prototype.watchedProjectConfigFileChanged = function (project) {
+                this.log("Config file changed: " + project.projectFilename);
+                this.updateConfiguredProject(project);
+                this.updateProjectStructure();
+            };
+            ProjectService.prototype.log = function (msg, type) {
+                if (type === void 0) { type = "Err"; }
+                this.psLogger.msg(msg, type);
+            };
+            ProjectService.prototype.setHostConfiguration = function (args) {
+                if (args.file) {
+                    var info = this.filenameToScriptInfo[args.file];
+                    if (info) {
+                        info.setFormatOptions(args.formatOptions);
+                        this.log("Host configuration update for file " + args.file, "Info");
+                    }
+                }
+                else {
+                    if (args.hostInfo !== undefined) {
+                        this.hostConfiguration.hostInfo = args.hostInfo;
+                        this.log("Host information " + args.hostInfo, "Info");
+                    }
+                    if (args.formatOptions) {
+                        mergeFormatOptions(this.hostConfiguration.formatCodeOptions, args.formatOptions);
+                        this.log("Format host information updated", "Info");
+                    }
+                }
+            };
+            ProjectService.prototype.closeLog = function () {
+                this.psLogger.close();
+            };
+            ProjectService.prototype.createInferredProject = function (root) {
+                var _this = this;
+                var project = new Project(this);
+                project.addRoot(root);
+                var currentPath = ts.getDirectoryPath(root.fileName);
+                var parentPath = ts.getDirectoryPath(currentPath);
+                while (currentPath != parentPath) {
+                    if (!project.projectService.directoryWatchersForTsconfig[currentPath]) {
+                        this.log("Add watcher for: " + currentPath);
+                        project.projectService.directoryWatchersForTsconfig[currentPath] =
+                            this.host.watchDirectory(currentPath, function (fileName) { return _this.directoryWatchedForTsconfigChanged(fileName); });
+                        project.projectService.directoryWatchersRefCount[currentPath] = 1;
+                    }
+                    else {
+                        project.projectService.directoryWatchersRefCount[currentPath] += 1;
+                    }
+                    project.directoriesWatchedForTsconfig.push(currentPath);
+                    currentPath = parentPath;
+                    parentPath = ts.getDirectoryPath(parentPath);
+                }
+                project.finishGraph();
+                this.inferredProjects.push(project);
+                return project;
+            };
+            ProjectService.prototype.fileDeletedInFilesystem = function (info) {
+                this.psLogger.info(info.fileName + " deleted");
+                if (info.fileWatcher) {
+                    info.fileWatcher.close();
+                    info.fileWatcher = undefined;
+                }
+                if (!info.isOpen) {
+                    this.filenameToScriptInfo[info.fileName] = undefined;
+                    var referencingProjects = this.findReferencingProjects(info);
+                    if (info.defaultProject) {
+                        info.defaultProject.removeRoot(info);
+                    }
+                    for (var i = 0, len = referencingProjects.length; i < len; i++) {
+                        referencingProjects[i].removeReferencedFile(info);
+                    }
+                    for (var j = 0, flen = this.openFileRoots.length; j < flen; j++) {
+                        var openFile = this.openFileRoots[j];
+                        if (this.eventHandler) {
+                            this.eventHandler("context", openFile.defaultProject, openFile.fileName);
+                        }
+                    }
+                    for (var j = 0, flen = this.openFilesReferenced.length; j < flen; j++) {
+                        var openFile = this.openFilesReferenced[j];
+                        if (this.eventHandler) {
+                            this.eventHandler("context", openFile.defaultProject, openFile.fileName);
+                        }
+                    }
+                }
+                this.printProjects();
+            };
+            ProjectService.prototype.updateConfiguredProjectList = function () {
+                var configuredProjects = [];
+                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
+                    if (this.configuredProjects[i].openRefCount > 0) {
+                        configuredProjects.push(this.configuredProjects[i]);
+                    }
+                }
+                this.configuredProjects = configuredProjects;
+            };
+            ProjectService.prototype.removeProject = function (project) {
+                this.log("remove project: " + project.getRootFiles().toString());
+                if (project.isConfiguredProject()) {
+                    project.projectFileWatcher.close();
+                    project.directoryWatcher.close();
+                    this.configuredProjects = copyListRemovingItem(project, this.configuredProjects);
+                }
+                else {
+                    for (var _i = 0, _a = project.directoriesWatchedForTsconfig; _i < _a.length; _i++) {
+                        var directory = _a[_i];
+                        project.projectService.directoryWatchersRefCount[directory]--;
+                        if (!project.projectService.directoryWatchersRefCount[directory]) {
+                            this.log("Close directory watcher for: " + directory);
+                            project.projectService.directoryWatchersForTsconfig[directory].close();
+                            delete project.projectService.directoryWatchersForTsconfig[directory];
+                        }
+                    }
+                    this.inferredProjects = copyListRemovingItem(project, this.inferredProjects);
+                }
+                var fileNames = project.getFileNames();
+                for (var _b = 0, fileNames_2 = fileNames; _b < fileNames_2.length; _b++) {
+                    var fileName = fileNames_2[_b];
+                    var info = this.getScriptInfo(fileName);
+                    if (info.defaultProject == project) {
+                        info.defaultProject = undefined;
+                    }
+                }
+            };
+            ProjectService.prototype.setConfiguredProjectRoot = function (info) {
+                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
+                    var configuredProject = this.configuredProjects[i];
+                    if (configuredProject.isRoot(info)) {
+                        info.defaultProject = configuredProject;
+                        configuredProject.addOpenRef();
+                        return true;
+                    }
+                }
+                return false;
+            };
+            ProjectService.prototype.addOpenFile = function (info) {
+                if (this.setConfiguredProjectRoot(info)) {
+                    this.openFileRootsConfigured.push(info);
+                }
+                else {
+                    this.findReferencingProjects(info);
+                    if (info.defaultProject) {
+                        this.openFilesReferenced.push(info);
+                    }
+                    else {
+                        info.defaultProject = this.createInferredProject(info);
+                        var openFileRoots = [];
+                        for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
+                            var r = this.openFileRoots[i];
+                            if (info.defaultProject.getSourceFile(r)) {
+                                this.removeProject(r.defaultProject);
+                                this.openFilesReferenced.push(r);
+                                r.defaultProject = info.defaultProject;
+                            }
+                            else {
+                                openFileRoots.push(r);
+                            }
+                        }
+                        this.openFileRoots = openFileRoots;
+                        this.openFileRoots.push(info);
+                    }
+                }
+                this.updateConfiguredProjectList();
+            };
+            ProjectService.prototype.closeOpenFile = function (info) {
+                info.svc.reloadFromFile(info.fileName);
+                var openFileRoots = [];
+                var removedProject;
+                for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
+                    if (info === this.openFileRoots[i]) {
+                        removedProject = info.defaultProject;
+                    }
+                    else {
+                        openFileRoots.push(this.openFileRoots[i]);
+                    }
+                }
+                this.openFileRoots = openFileRoots;
+                if (!removedProject) {
+                    var openFileRootsConfigured = [];
+                    for (var i = 0, len = this.openFileRootsConfigured.length; i < len; i++) {
+                        if (info === this.openFileRootsConfigured[i]) {
+                            if (info.defaultProject.deleteOpenRef() === 0) {
+                                removedProject = info.defaultProject;
+                            }
+                        }
+                        else {
+                            openFileRootsConfigured.push(this.openFileRootsConfigured[i]);
+                        }
+                    }
+                    this.openFileRootsConfigured = openFileRootsConfigured;
+                }
+                if (removedProject) {
+                    this.removeProject(removedProject);
+                    var openFilesReferenced = [];
+                    var orphanFiles = [];
+                    for (var i = 0, len = this.openFilesReferenced.length; i < len; i++) {
+                        var f = this.openFilesReferenced[i];
+                        if (f.defaultProject === removedProject || !f.defaultProject) {
+                            f.defaultProject = undefined;
+                            orphanFiles.push(f);
+                        }
+                        else {
+                            openFilesReferenced.push(f);
+                        }
+                    }
+                    this.openFilesReferenced = openFilesReferenced;
+                    for (var i = 0, len = orphanFiles.length; i < len; i++) {
+                        this.addOpenFile(orphanFiles[i]);
+                    }
+                }
+                else {
+                    this.openFilesReferenced = copyListRemovingItem(info, this.openFilesReferenced);
+                }
+                info.close();
+            };
+            ProjectService.prototype.findReferencingProjects = function (info, excludedProject) {
+                var referencingProjects = [];
+                info.defaultProject = undefined;
+                for (var i = 0, len = this.inferredProjects.length; i < len; i++) {
+                    var inferredProject = this.inferredProjects[i];
+                    inferredProject.updateGraph();
+                    if (inferredProject !== excludedProject) {
+                        if (inferredProject.getSourceFile(info)) {
+                            info.defaultProject = inferredProject;
+                            referencingProjects.push(inferredProject);
+                        }
+                    }
+                }
+                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
+                    var configuredProject = this.configuredProjects[i];
+                    configuredProject.updateGraph();
+                    if (configuredProject.getSourceFile(info)) {
+                        info.defaultProject = configuredProject;
+                        referencingProjects.push(configuredProject);
+                    }
+                }
+                return referencingProjects;
+            };
+            ProjectService.prototype.reloadProjects = function () {
+                this.log("reload projects.");
+                for (var _i = 0, _a = this.openFileRoots; _i < _a.length; _i++) {
+                    var info = _a[_i];
+                    this.openOrUpdateConfiguredProjectForFile(info.fileName);
+                }
+                this.updateProjectStructure();
+            };
+            ProjectService.prototype.updateProjectStructure = function () {
+                this.log("updating project structure from ...", "Info");
+                this.printProjects();
+                var unattachedOpenFiles = [];
+                var openFileRootsConfigured = [];
+                for (var _i = 0, _a = this.openFileRootsConfigured; _i < _a.length; _i++) {
+                    var info = _a[_i];
+                    var project = info.defaultProject;
+                    if (!project || !(project.getSourceFile(info))) {
+                        info.defaultProject = undefined;
+                        unattachedOpenFiles.push(info);
+                    }
+                    else {
+                        openFileRootsConfigured.push(info);
+                    }
+                }
+                this.openFileRootsConfigured = openFileRootsConfigured;
+                var openFilesReferenced = [];
+                for (var i = 0, len = this.openFilesReferenced.length; i < len; i++) {
+                    var referencedFile = this.openFilesReferenced[i];
+                    referencedFile.defaultProject.updateGraph();
+                    var sourceFile = referencedFile.defaultProject.getSourceFile(referencedFile);
+                    if (sourceFile) {
+                        openFilesReferenced.push(referencedFile);
+                    }
+                    else {
+                        unattachedOpenFiles.push(referencedFile);
+                    }
+                }
+                this.openFilesReferenced = openFilesReferenced;
+                var openFileRoots = [];
+                for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
+                    var rootFile = this.openFileRoots[i];
+                    var rootedProject = rootFile.defaultProject;
+                    var referencingProjects = this.findReferencingProjects(rootFile, rootedProject);
+                    if (rootFile.defaultProject && rootFile.defaultProject.isConfiguredProject()) {
+                        if (!rootedProject.isConfiguredProject()) {
+                            this.removeProject(rootedProject);
+                        }
+                        this.openFileRootsConfigured.push(rootFile);
+                    }
+                    else {
+                        if (referencingProjects.length === 0) {
+                            rootFile.defaultProject = rootedProject;
+                            openFileRoots.push(rootFile);
+                        }
+                        else {
+                            this.removeProject(rootedProject);
+                            this.openFilesReferenced.push(rootFile);
+                        }
+                    }
+                }
+                this.openFileRoots = openFileRoots;
+                for (var i = 0, len = unattachedOpenFiles.length; i < len; i++) {
+                    this.addOpenFile(unattachedOpenFiles[i]);
+                }
+                this.printProjects();
+            };
+            ProjectService.prototype.getScriptInfo = function (filename) {
+                filename = ts.normalizePath(filename);
+                return ts.lookUp(this.filenameToScriptInfo, filename);
+            };
+            ProjectService.prototype.openFile = function (fileName, openedByClient, fileContent, scriptKind) {
+                var _this = this;
+                fileName = ts.normalizePath(fileName);
+                var info = ts.lookUp(this.filenameToScriptInfo, fileName);
+                if (!info) {
+                    var content = void 0;
+                    if (this.host.fileExists(fileName)) {
+                        content = fileContent || this.host.readFile(fileName);
+                    }
+                    if (!content) {
+                        if (openedByClient) {
+                            content = "";
+                        }
+                    }
+                    if (content !== undefined) {
+                        info = new ScriptInfo(this.host, fileName, content, openedByClient);
+                        info.scriptKind = scriptKind;
+                        info.setFormatOptions(this.getFormatCodeOptions());
+                        this.filenameToScriptInfo[fileName] = info;
+                        if (!info.isOpen) {
+                            info.fileWatcher = this.host.watchFile(fileName, function (_) { _this.watchedFileChanged(fileName); });
+                        }
+                    }
+                }
+                if (info) {
+                    if (fileContent) {
+                        info.svc.reload(fileContent);
+                    }
+                    if (openedByClient) {
+                        info.isOpen = true;
+                    }
+                }
+                return info;
+            };
+            ProjectService.prototype.findConfigFile = function (searchPath) {
+                while (true) {
+                    var tsconfigFileName = ts.combinePaths(searchPath, "tsconfig.json");
+                    if (this.host.fileExists(tsconfigFileName)) {
+                        return tsconfigFileName;
+                    }
+                    var jsconfigFileName = ts.combinePaths(searchPath, "jsconfig.json");
+                    if (this.host.fileExists(jsconfigFileName)) {
+                        return jsconfigFileName;
+                    }
+                    var parentPath = ts.getDirectoryPath(searchPath);
+                    if (parentPath === searchPath) {
+                        break;
+                    }
+                    searchPath = parentPath;
+                }
+                return undefined;
+            };
+            ProjectService.prototype.openClientFile = function (fileName, fileContent, scriptKind) {
+                var _a = this.openOrUpdateConfiguredProjectForFile(fileName), configFileName = _a.configFileName, configFileErrors = _a.configFileErrors;
+                var info = this.openFile(fileName, true, fileContent, scriptKind);
+                this.addOpenFile(info);
+                this.printProjects();
+                return { configFileName: configFileName, configFileErrors: configFileErrors };
+            };
+            ProjectService.prototype.openOrUpdateConfiguredProjectForFile = function (fileName) {
+                var searchPath = ts.normalizePath(ts.getDirectoryPath(fileName));
+                this.log("Search path: " + searchPath, "Info");
+                var configFileName = this.findConfigFile(searchPath);
+                if (configFileName) {
+                    this.log("Config file name: " + configFileName, "Info");
+                    var project = this.findConfiguredProjectByConfigFile(configFileName);
+                    if (!project) {
+                        var configResult = this.openConfigFile(configFileName, fileName);
+                        if (!configResult.success) {
+                            return { configFileName: configFileName, configFileErrors: configResult.errors };
+                        }
+                        else {
+                            this.log("Opened configuration file " + configFileName, "Info");
+                            this.configuredProjects.push(configResult.project);
+                            if (configResult.errors && configResult.errors.length > 0) {
+                                return { configFileName: configFileName, configFileErrors: configResult.errors };
+                            }
+                        }
+                    }
+                    else {
+                        this.updateConfiguredProject(project);
+                    }
+                }
+                else {
+                    this.log("No config files found.");
+                }
+                return configFileName ? { configFileName: configFileName } : {};
+            };
+            ProjectService.prototype.closeClientFile = function (filename) {
+                var info = ts.lookUp(this.filenameToScriptInfo, filename);
+                if (info) {
+                    this.closeOpenFile(info);
+                    info.isOpen = false;
+                }
+                this.printProjects();
+            };
+            ProjectService.prototype.getProjectForFile = function (filename) {
+                var scriptInfo = ts.lookUp(this.filenameToScriptInfo, filename);
+                if (scriptInfo) {
+                    return scriptInfo.defaultProject;
+                }
+            };
+            ProjectService.prototype.printProjectsForFile = function (filename) {
+                var scriptInfo = ts.lookUp(this.filenameToScriptInfo, filename);
+                if (scriptInfo) {
+                    this.psLogger.startGroup();
+                    this.psLogger.info("Projects for " + filename);
+                    var projects = this.findReferencingProjects(scriptInfo);
+                    for (var i = 0, len = projects.length; i < len; i++) {
+                        this.psLogger.info("Project " + i.toString());
+                    }
+                    this.psLogger.endGroup();
+                }
+                else {
+                    this.psLogger.info(filename + " not in any project");
+                }
+            };
+            ProjectService.prototype.printProjects = function () {
+                if (!this.psLogger.isVerbose()) {
+                    return;
+                }
+                this.psLogger.startGroup();
+                for (var i = 0, len = this.inferredProjects.length; i < len; i++) {
+                    var project = this.inferredProjects[i];
+                    project.updateGraph();
+                    this.psLogger.info("Project " + i.toString());
+                    this.psLogger.info(project.filesToString());
+                    this.psLogger.info("-----------------------------------------------");
+                }
+                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
+                    var project = this.configuredProjects[i];
+                    project.updateGraph();
+                    this.psLogger.info("Project (configured) " + (i + this.inferredProjects.length).toString());
+                    this.psLogger.info(project.filesToString());
+                    this.psLogger.info("-----------------------------------------------");
+                }
+                this.psLogger.info("Open file roots of inferred projects: ");
+                for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
+                    this.psLogger.info(this.openFileRoots[i].fileName);
+                }
+                this.psLogger.info("Open files referenced by inferred or configured projects: ");
+                for (var i = 0, len = this.openFilesReferenced.length; i < len; i++) {
+                    var fileInfo = this.openFilesReferenced[i].fileName;
+                    if (this.openFilesReferenced[i].defaultProject.isConfiguredProject()) {
+                        fileInfo += " (configured)";
+                    }
+                    this.psLogger.info(fileInfo);
+                }
+                this.psLogger.info("Open file roots of configured projects: ");
+                for (var i = 0, len = this.openFileRootsConfigured.length; i < len; i++) {
+                    this.psLogger.info(this.openFileRootsConfigured[i].fileName);
+                }
+                this.psLogger.endGroup();
+            };
+            ProjectService.prototype.configProjectIsActive = function (fileName) {
+                return this.findConfiguredProjectByConfigFile(fileName) === undefined;
+            };
+            ProjectService.prototype.findConfiguredProjectByConfigFile = function (configFileName) {
+                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
+                    if (this.configuredProjects[i].projectFilename == configFileName) {
+                        return this.configuredProjects[i];
+                    }
+                }
+                return undefined;
+            };
+            ProjectService.prototype.configFileToProjectOptions = function (configFilename) {
+                configFilename = ts.normalizePath(configFilename);
+                var dirPath = ts.getDirectoryPath(configFilename);
+                var contents = this.host.readFile(configFilename);
+                var rawConfig = ts.parseConfigFileTextToJson(configFilename, contents);
+                if (rawConfig.error) {
+                    return { succeeded: false, errors: [rawConfig.error] };
+                }
+                else {
+                    var parsedCommandLine = ts.parseJsonConfigFileContent(rawConfig.config, this.host, dirPath, {}, configFilename);
+                    ts.Debug.assert(!!parsedCommandLine.fileNames);
+                    if (parsedCommandLine.errors && (parsedCommandLine.errors.length > 0)) {
+                        return { succeeded: false, errors: parsedCommandLine.errors };
+                    }
+                    else if (parsedCommandLine.fileNames.length === 0) {
+                        var error = ts.createCompilerDiagnostic(ts.Diagnostics.The_config_file_0_found_doesn_t_contain_any_source_files, configFilename);
+                        return { succeeded: false, errors: [error] };
+                    }
+                    else {
+                        var projectOptions = {
+                            files: parsedCommandLine.fileNames,
+                            compilerOptions: parsedCommandLine.options
+                        };
+                        return { succeeded: true, projectOptions: projectOptions };
+                    }
+                }
+            };
+            ProjectService.prototype.openConfigFile = function (configFilename, clientFileName) {
+                var _this = this;
+                var _a = this.configFileToProjectOptions(configFilename), succeeded = _a.succeeded, projectOptions = _a.projectOptions, errors = _a.errors;
+                if (!succeeded) {
+                    return { success: false, errors: errors };
+                }
+                else {
+                    var project_1 = this.createProject(configFilename, projectOptions);
+                    var errors_1;
+                    for (var _i = 0, _b = projectOptions.files; _i < _b.length; _i++) {
+                        var rootFilename = _b[_i];
+                        if (this.host.fileExists(rootFilename)) {
+                            var info = this.openFile(rootFilename, clientFileName == rootFilename);
+                            project_1.addRoot(info);
+                        }
+                        else {
+                            (errors_1 || (errors_1 = [])).push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, rootFilename));
+                        }
+                    }
+                    project_1.finishGraph();
+                    project_1.projectFileWatcher = this.host.watchFile(configFilename, function (_) { return _this.watchedProjectConfigFileChanged(project_1); });
+                    this.log("Add recursive watcher for: " + ts.getDirectoryPath(configFilename));
+                    project_1.directoryWatcher = this.host.watchDirectory(ts.getDirectoryPath(configFilename), function (path) { return _this.directoryWatchedForSourceFilesChanged(project_1, path); }, true);
+                    return { success: true, project: project_1, errors: errors_1 };
+                }
+            };
+            ProjectService.prototype.updateConfiguredProject = function (project) {
+                var _this = this;
+                if (!this.host.fileExists(project.projectFilename)) {
+                    this.log("Config file deleted");
+                    this.removeProject(project);
+                }
+                else {
+                    var _a = this.configFileToProjectOptions(project.projectFilename), succeeded = _a.succeeded, projectOptions = _a.projectOptions, errors = _a.errors;
+                    if (!succeeded) {
+                        return errors;
+                    }
+                    else {
+                        var oldFileNames_1 = project.compilerService.host.roots.map(function (info) { return info.fileName; });
+                        var newFileNames_1 = ts.filter(projectOptions.files, function (f) { return _this.host.fileExists(f); });
+                        var fileNamesToRemove = oldFileNames_1.filter(function (f) { return newFileNames_1.indexOf(f) < 0; });
+                        var fileNamesToAdd = newFileNames_1.filter(function (f) { return oldFileNames_1.indexOf(f) < 0; });
+                        for (var _i = 0, fileNamesToRemove_1 = fileNamesToRemove; _i < fileNamesToRemove_1.length; _i++) {
+                            var fileName = fileNamesToRemove_1[_i];
+                            var info = this.getScriptInfo(fileName);
+                            if (info) {
+                                project.removeRoot(info);
+                            }
+                        }
+                        for (var _b = 0, fileNamesToAdd_1 = fileNamesToAdd; _b < fileNamesToAdd_1.length; _b++) {
+                            var fileName = fileNamesToAdd_1[_b];
+                            var info = this.getScriptInfo(fileName);
+                            if (!info) {
+                                info = this.openFile(fileName, false);
+                            }
+                            else {
+                                if (info.isOpen) {
+                                    if (this.openFileRoots.indexOf(info) >= 0) {
+                                        this.openFileRoots = copyListRemovingItem(info, this.openFileRoots);
+                                        if (info.defaultProject && !info.defaultProject.isConfiguredProject()) {
+                                            this.removeProject(info.defaultProject);
+                                        }
+                                    }
+                                    if (this.openFilesReferenced.indexOf(info) >= 0) {
+                                        this.openFilesReferenced = copyListRemovingItem(info, this.openFilesReferenced);
+                                    }
+                                    this.openFileRootsConfigured.push(info);
+                                    info.defaultProject = project;
+                                }
+                            }
+                            project.addRoot(info);
+                        }
+                        project.setProjectOptions(projectOptions);
+                        project.finishGraph();
+                    }
+                }
+            };
+            ProjectService.prototype.createProject = function (projectFilename, projectOptions) {
+                var project = new Project(this, projectOptions);
+                project.projectFilename = projectFilename;
+                return project;
+            };
+            return ProjectService;
+        }());
+        server.ProjectService = ProjectService;
+        var CompilerService = (function () {
+            function CompilerService(project, opt) {
+                this.project = project;
+                this.documentRegistry = ts.createDocumentRegistry();
+                this.host = new LSHost(project.projectService.host, project);
+                if (opt) {
+                    this.setCompilerOptions(opt);
+                }
+                else {
+                    var defaultOpts = ts.getDefaultCompilerOptions();
+                    defaultOpts.allowNonTsExtensions = true;
+                    defaultOpts.allowJs = true;
+                    this.setCompilerOptions(defaultOpts);
+                }
+                this.languageService = ts.createLanguageService(this.host, this.documentRegistry);
+                this.classifier = ts.createClassifier();
+            }
+            CompilerService.prototype.setCompilerOptions = function (opt) {
+                this.settings = opt;
+                this.host.setCompilationSettings(opt);
+            };
+            CompilerService.prototype.isExternalModule = function (filename) {
+                var sourceFile = this.languageService.getNonBoundSourceFile(filename);
+                return ts.isExternalModule(sourceFile);
+            };
+            CompilerService.getDefaultFormatCodeOptions = function (host) {
+                return ts.clone({
+                    IndentSize: 4,
+                    TabSize: 4,
+                    NewLineCharacter: host.newLine || "\n",
+                    ConvertTabsToSpaces: true,
+                    IndentStyle: ts.IndentStyle.Smart,
+                    InsertSpaceAfterCommaDelimiter: true,
+                    InsertSpaceAfterSemicolonInForStatements: true,
+                    InsertSpaceBeforeAndAfterBinaryOperators: true,
+                    InsertSpaceAfterKeywordsInControlFlowStatements: true,
+                    InsertSpaceAfterFunctionKeywordForAnonymousFunctions: false,
+                    InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: false,
+                    InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: false,
+                    InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: false,
+                    PlaceOpenBraceOnNewLineForFunctions: false,
+                    PlaceOpenBraceOnNewLineForControlBlocks: false
+                });
+            };
+            return CompilerService;
+        }());
+        server.CompilerService = CompilerService;
+        (function (CharRangeSection) {
+            CharRangeSection[CharRangeSection["PreStart"] = 0] = "PreStart";
+            CharRangeSection[CharRangeSection["Start"] = 1] = "Start";
+            CharRangeSection[CharRangeSection["Entire"] = 2] = "Entire";
+            CharRangeSection[CharRangeSection["Mid"] = 3] = "Mid";
+            CharRangeSection[CharRangeSection["End"] = 4] = "End";
+            CharRangeSection[CharRangeSection["PostEnd"] = 5] = "PostEnd";
+        })(server.CharRangeSection || (server.CharRangeSection = {}));
+        var CharRangeSection = server.CharRangeSection;
+        var BaseLineIndexWalker = (function () {
+            function BaseLineIndexWalker() {
+                this.goSubtree = true;
+                this.done = false;
+            }
+            BaseLineIndexWalker.prototype.leaf = function (rangeStart, rangeLength, ll) {
+            };
+            return BaseLineIndexWalker;
+        }());
+        var EditWalker = (function (_super) {
+            __extends(EditWalker, _super);
+            function EditWalker() {
+                _super.call(this);
+                this.lineIndex = new LineIndex();
+                this.endBranch = [];
+                this.state = CharRangeSection.Entire;
+                this.initialText = "";
+                this.trailingText = "";
+                this.suppressTrailingText = false;
+                this.lineIndex.root = new LineNode();
+                this.startPath = [this.lineIndex.root];
+                this.stack = [this.lineIndex.root];
+            }
+            EditWalker.prototype.insertLines = function (insertedText) {
+                if (this.suppressTrailingText) {
+                    this.trailingText = "";
+                }
+                if (insertedText) {
+                    insertedText = this.initialText + insertedText + this.trailingText;
+                }
+                else {
+                    insertedText = this.initialText + this.trailingText;
+                }
+                var lm = LineIndex.linesFromText(insertedText);
+                var lines = lm.lines;
+                if (lines.length > 1) {
+                    if (lines[lines.length - 1] == "") {
+                        lines.length--;
+                    }
+                }
+                var branchParent;
+                var lastZeroCount;
+                for (var k = this.endBranch.length - 1; k >= 0; k--) {
+                    this.endBranch[k].updateCounts();
+                    if (this.endBranch[k].charCount() === 0) {
+                        lastZeroCount = this.endBranch[k];
+                        if (k > 0) {
+                            branchParent = this.endBranch[k - 1];
+                        }
+                        else {
+                            branchParent = this.branchNode;
+                        }
+                    }
+                }
+                if (lastZeroCount) {
+                    branchParent.remove(lastZeroCount);
+                }
+                var insertionNode = this.startPath[this.startPath.length - 2];
+                var leafNode = this.startPath[this.startPath.length - 1];
+                var len = lines.length;
+                if (len > 0) {
+                    leafNode.text = lines[0];
+                    if (len > 1) {
+                        var insertedNodes = new Array(len - 1);
+                        var startNode = leafNode;
+                        for (var i = 1, len_1 = lines.length; i < len_1; i++) {
+                            insertedNodes[i - 1] = new LineLeaf(lines[i]);
+                        }
+                        var pathIndex = this.startPath.length - 2;
+                        while (pathIndex >= 0) {
+                            insertionNode = this.startPath[pathIndex];
+                            insertedNodes = insertionNode.insertAt(startNode, insertedNodes);
+                            pathIndex--;
+                            startNode = insertionNode;
+                        }
+                        var insertedNodesLen = insertedNodes.length;
+                        while (insertedNodesLen > 0) {
+                            var newRoot = new LineNode();
+                            newRoot.add(this.lineIndex.root);
+                            insertedNodes = newRoot.insertAt(this.lineIndex.root, insertedNodes);
+                            insertedNodesLen = insertedNodes.length;
+                            this.lineIndex.root = newRoot;
+                        }
+                        this.lineIndex.root.updateCounts();
+                    }
+                    else {
+                        for (var j = this.startPath.length - 2; j >= 0; j--) {
+                            this.startPath[j].updateCounts();
+                        }
+                    }
+                }
+                else {
+                    insertionNode.remove(leafNode);
+                    for (var j = this.startPath.length - 2; j >= 0; j--) {
+                        this.startPath[j].updateCounts();
+                    }
+                }
+                return this.lineIndex;
+            };
+            EditWalker.prototype.post = function (relativeStart, relativeLength, lineCollection, parent, nodeType) {
+                if (lineCollection === this.lineCollectionAtBranch) {
+                    this.state = CharRangeSection.End;
+                }
+                this.stack.length--;
+                return undefined;
+            };
+            EditWalker.prototype.pre = function (relativeStart, relativeLength, lineCollection, parent, nodeType) {
+                var currentNode = this.stack[this.stack.length - 1];
+                if ((this.state === CharRangeSection.Entire) && (nodeType === CharRangeSection.Start)) {
+                    this.state = CharRangeSection.Start;
+                    this.branchNode = currentNode;
+                    this.lineCollectionAtBranch = lineCollection;
+                }
+                var child;
+                function fresh(node) {
+                    if (node.isLeaf()) {
+                        return new LineLeaf("");
+                    }
+                    else
+                        return new LineNode();
+                }
+                switch (nodeType) {
+                    case CharRangeSection.PreStart:
+                        this.goSubtree = false;
+                        if (this.state !== CharRangeSection.End) {
+                            currentNode.add(lineCollection);
+                        }
+                        break;
+                    case CharRangeSection.Start:
+                        if (this.state === CharRangeSection.End) {
+                            this.goSubtree = false;
+                        }
+                        else {
+                            child = fresh(lineCollection);
+                            currentNode.add(child);
+                            this.startPath[this.startPath.length] = child;
+                        }
+                        break;
+                    case CharRangeSection.Entire:
+                        if (this.state !== CharRangeSection.End) {
+                            child = fresh(lineCollection);
+                            currentNode.add(child);
+                            this.startPath[this.startPath.length] = child;
+                        }
+                        else {
+                            if (!lineCollection.isLeaf()) {
+                                child = fresh(lineCollection);
+                                currentNode.add(child);
+                                this.endBranch[this.endBranch.length] = child;
+                            }
+                        }
+                        break;
+                    case CharRangeSection.Mid:
+                        this.goSubtree = false;
+                        break;
+                    case CharRangeSection.End:
+                        if (this.state !== CharRangeSection.End) {
+                            this.goSubtree = false;
+                        }
+                        else {
+                            if (!lineCollection.isLeaf()) {
+                                child = fresh(lineCollection);
+                                currentNode.add(child);
+                                this.endBranch[this.endBranch.length] = child;
+                            }
+                        }
+                        break;
+                    case CharRangeSection.PostEnd:
+                        this.goSubtree = false;
+                        if (this.state !== CharRangeSection.Start) {
+                            currentNode.add(lineCollection);
+                        }
+                        break;
+                }
+                if (this.goSubtree) {
+                    this.stack[this.stack.length] = child;
+                }
+                return lineCollection;
+            };
+            EditWalker.prototype.leaf = function (relativeStart, relativeLength, ll) {
+                if (this.state === CharRangeSection.Start) {
+                    this.initialText = ll.text.substring(0, relativeStart);
+                }
+                else if (this.state === CharRangeSection.Entire) {
+                    this.initialText = ll.text.substring(0, relativeStart);
+                    this.trailingText = ll.text.substring(relativeStart + relativeLength);
+                }
+                else {
+                    this.trailingText = ll.text.substring(relativeStart + relativeLength);
+                }
+            };
+            return EditWalker;
+        }(BaseLineIndexWalker));
+        var TextChange = (function () {
+            function TextChange(pos, deleteLen, insertedText) {
+                this.pos = pos;
+                this.deleteLen = deleteLen;
+                this.insertedText = insertedText;
+            }
+            TextChange.prototype.getTextChangeRange = function () {
+                return ts.createTextChangeRange(ts.createTextSpan(this.pos, this.deleteLen), this.insertedText ? this.insertedText.length : 0);
+            };
+            return TextChange;
+        }());
+        server.TextChange = TextChange;
+        var ScriptVersionCache = (function () {
+            function ScriptVersionCache() {
+                this.changes = [];
+                this.versions = [];
+                this.minVersion = 0;
+                this.currentVersion = 0;
+            }
+            ScriptVersionCache.prototype.edit = function (pos, deleteLen, insertedText) {
+                this.changes[this.changes.length] = new TextChange(pos, deleteLen, insertedText);
+                if ((this.changes.length > ScriptVersionCache.changeNumberThreshold) ||
+                    (deleteLen > ScriptVersionCache.changeLengthThreshold) ||
+                    (insertedText && (insertedText.length > ScriptVersionCache.changeLengthThreshold))) {
+                    this.getSnapshot();
+                }
+            };
+            ScriptVersionCache.prototype.latest = function () {
+                return this.versions[this.currentVersion];
+            };
+            ScriptVersionCache.prototype.latestVersion = function () {
+                if (this.changes.length > 0) {
+                    this.getSnapshot();
+                }
+                return this.currentVersion;
+            };
+            ScriptVersionCache.prototype.reloadFromFile = function (filename, cb) {
+                var content = this.host.readFile(filename);
+                if (!content) {
+                    content = "";
+                }
+                this.reload(content);
+                if (cb)
+                    cb();
+            };
+            ScriptVersionCache.prototype.reload = function (script) {
+                this.currentVersion++;
+                this.changes = [];
+                var snap = new LineIndexSnapshot(this.currentVersion, this);
+                this.versions[this.currentVersion] = snap;
+                snap.index = new LineIndex();
+                var lm = LineIndex.linesFromText(script);
+                snap.index.load(lm.lines);
+                for (var i = this.minVersion; i < this.currentVersion; i++) {
+                    this.versions[i] = undefined;
+                }
+                this.minVersion = this.currentVersion;
+            };
+            ScriptVersionCache.prototype.getSnapshot = function () {
+                var snap = this.versions[this.currentVersion];
+                if (this.changes.length > 0) {
+                    var snapIndex = this.latest().index;
+                    for (var i = 0, len = this.changes.length; i < len; i++) {
+                        var change = this.changes[i];
+                        snapIndex = snapIndex.edit(change.pos, change.deleteLen, change.insertedText);
+                    }
+                    snap = new LineIndexSnapshot(this.currentVersion + 1, this);
+                    snap.index = snapIndex;
+                    snap.changesSincePreviousVersion = this.changes;
+                    this.currentVersion = snap.version;
+                    this.versions[snap.version] = snap;
+                    this.changes = [];
+                    if ((this.currentVersion - this.minVersion) >= ScriptVersionCache.maxVersions) {
+                        var oldMin = this.minVersion;
+                        this.minVersion = (this.currentVersion - ScriptVersionCache.maxVersions) + 1;
+                        for (var j = oldMin; j < this.minVersion; j++) {
+                            this.versions[j] = undefined;
+                        }
+                    }
+                }
+                return snap;
+            };
+            ScriptVersionCache.prototype.getTextChangesBetweenVersions = function (oldVersion, newVersion) {
+                if (oldVersion < newVersion) {
+                    if (oldVersion >= this.minVersion) {
+                        var textChangeRanges = [];
+                        for (var i = oldVersion + 1; i <= newVersion; i++) {
+                            var snap = this.versions[i];
+                            for (var j = 0, len = snap.changesSincePreviousVersion.length; j < len; j++) {
+                                var textChange = snap.changesSincePreviousVersion[j];
+                                textChangeRanges[textChangeRanges.length] = textChange.getTextChangeRange();
+                            }
+                        }
+                        return ts.collapseTextChangeRangesAcrossMultipleVersions(textChangeRanges);
+                    }
+                    else {
+                        return undefined;
+                    }
+                }
+                else {
+                    return ts.unchangedTextChangeRange;
+                }
+            };
+            ScriptVersionCache.fromString = function (host, script) {
+                var svc = new ScriptVersionCache();
+                var snap = new LineIndexSnapshot(0, svc);
+                svc.versions[svc.currentVersion] = snap;
+                svc.host = host;
+                snap.index = new LineIndex();
+                var lm = LineIndex.linesFromText(script);
+                snap.index.load(lm.lines);
+                return svc;
+            };
+            ScriptVersionCache.changeNumberThreshold = 8;
+            ScriptVersionCache.changeLengthThreshold = 256;
+            ScriptVersionCache.maxVersions = 8;
+            return ScriptVersionCache;
+        }());
+        server.ScriptVersionCache = ScriptVersionCache;
+        var LineIndexSnapshot = (function () {
+            function LineIndexSnapshot(version, cache) {
+                this.version = version;
+                this.cache = cache;
+                this.changesSincePreviousVersion = [];
+            }
+            LineIndexSnapshot.prototype.getText = function (rangeStart, rangeEnd) {
+                return this.index.getText(rangeStart, rangeEnd - rangeStart);
+            };
+            LineIndexSnapshot.prototype.getLength = function () {
+                return this.index.root.charCount();
+            };
+            LineIndexSnapshot.prototype.getLineStartPositions = function () {
+                var starts = [-1];
+                var count = 1;
+                var pos = 0;
+                this.index.every(function (ll, s, len) {
+                    starts[count] = pos;
+                    count++;
+                    pos += ll.text.length;
+                    return true;
+                }, 0);
+                return starts;
+            };
+            LineIndexSnapshot.prototype.getLineMapper = function () {
+                var _this = this;
+                return function (line) {
+                    return _this.index.lineNumberToInfo(line).offset;
+                };
+            };
+            LineIndexSnapshot.prototype.getTextChangeRangeSinceVersion = function (scriptVersion) {
+                if (this.version <= scriptVersion) {
+                    return ts.unchangedTextChangeRange;
+                }
+                else {
+                    return this.cache.getTextChangesBetweenVersions(scriptVersion, this.version);
+                }
+            };
+            LineIndexSnapshot.prototype.getChangeRange = function (oldSnapshot) {
+                var oldSnap = oldSnapshot;
+                return this.getTextChangeRangeSinceVersion(oldSnap.version);
+            };
+            return LineIndexSnapshot;
+        }());
+        server.LineIndexSnapshot = LineIndexSnapshot;
+        var LineIndex = (function () {
+            function LineIndex() {
+                this.checkEdits = false;
+            }
+            LineIndex.prototype.charOffsetToLineNumberAndPos = function (charOffset) {
+                return this.root.charOffsetToLineNumberAndPos(1, charOffset);
+            };
+            LineIndex.prototype.lineNumberToInfo = function (lineNumber) {
+                var lineCount = this.root.lineCount();
+                if (lineNumber <= lineCount) {
+                    var lineInfo = this.root.lineNumberToInfo(lineNumber, 0);
+                    lineInfo.line = lineNumber;
+                    return lineInfo;
+                }
+                else {
+                    return {
+                        line: lineNumber,
+                        offset: this.root.charCount()
+                    };
+                }
+            };
+            LineIndex.prototype.load = function (lines) {
+                if (lines.length > 0) {
+                    var leaves = [];
+                    for (var i = 0, len = lines.length; i < len; i++) {
+                        leaves[i] = new LineLeaf(lines[i]);
+                    }
+                    this.root = LineIndex.buildTreeFromBottom(leaves);
+                }
+                else {
+                    this.root = new LineNode();
+                }
+            };
+            LineIndex.prototype.walk = function (rangeStart, rangeLength, walkFns) {
+                this.root.walk(rangeStart, rangeLength, walkFns);
+            };
+            LineIndex.prototype.getText = function (rangeStart, rangeLength) {
+                var accum = "";
+                if ((rangeLength > 0) && (rangeStart < this.root.charCount())) {
+                    this.walk(rangeStart, rangeLength, {
+                        goSubtree: true,
+                        done: false,
+                        leaf: function (relativeStart, relativeLength, ll) {
+                            accum = accum.concat(ll.text.substring(relativeStart, relativeStart + relativeLength));
+                        }
+                    });
+                }
+                return accum;
+            };
+            LineIndex.prototype.getLength = function () {
+                return this.root.charCount();
+            };
+            LineIndex.prototype.every = function (f, rangeStart, rangeEnd) {
+                if (!rangeEnd) {
+                    rangeEnd = this.root.charCount();
+                }
+                var walkFns = {
+                    goSubtree: true,
+                    done: false,
+                    leaf: function (relativeStart, relativeLength, ll) {
+                        if (!f(ll, relativeStart, relativeLength)) {
+                            this.done = true;
+                        }
+                    }
+                };
+                this.walk(rangeStart, rangeEnd - rangeStart, walkFns);
+                return !walkFns.done;
+            };
+            LineIndex.prototype.edit = function (pos, deleteLength, newText) {
+                function editFlat(source, s, dl, nt) {
+                    if (nt === void 0) { nt = ""; }
+                    return source.substring(0, s) + nt + source.substring(s + dl, source.length);
+                }
+                if (this.root.charCount() === 0) {
+                    if (newText) {
+                        this.load(LineIndex.linesFromText(newText).lines);
+                        return this;
+                    }
+                }
+                else {
+                    var checkText = void 0;
+                    if (this.checkEdits) {
+                        checkText = editFlat(this.getText(0, this.root.charCount()), pos, deleteLength, newText);
+                    }
+                    var walker = new EditWalker();
+                    if (pos >= this.root.charCount()) {
+                        pos = this.root.charCount() - 1;
+                        var endString = this.getText(pos, 1);
+                        if (newText) {
+                            newText = endString + newText;
+                        }
+                        else {
+                            newText = endString;
+                        }
+                        deleteLength = 0;
+                        walker.suppressTrailingText = true;
+                    }
+                    else if (deleteLength > 0) {
+                        var e = pos + deleteLength;
+                        var lineInfo = this.charOffsetToLineNumberAndPos(e);
+                        if ((lineInfo && (lineInfo.offset === 0))) {
+                            deleteLength += lineInfo.text.length;
+                            if (newText) {
+                                newText = newText + lineInfo.text;
+                            }
+                            else {
+                                newText = lineInfo.text;
+                            }
+                        }
+                    }
+                    if (pos < this.root.charCount()) {
+                        this.root.walk(pos, deleteLength, walker);
+                        walker.insertLines(newText);
+                    }
+                    if (this.checkEdits) {
+                        var updatedText = this.getText(0, this.root.charCount());
+                        ts.Debug.assert(checkText == updatedText, "buffer edit mismatch");
+                    }
+                    return walker.lineIndex;
+                }
+            };
+            LineIndex.buildTreeFromBottom = function (nodes) {
+                var nodeCount = Math.ceil(nodes.length / lineCollectionCapacity);
+                var interiorNodes = [];
+                var nodeIndex = 0;
+                for (var i = 0; i < nodeCount; i++) {
+                    interiorNodes[i] = new LineNode();
+                    var charCount = 0;
+                    var lineCount = 0;
+                    for (var j = 0; j < lineCollectionCapacity; j++) {
+                        if (nodeIndex < nodes.length) {
+                            interiorNodes[i].add(nodes[nodeIndex]);
+                            charCount += nodes[nodeIndex].charCount();
+                            lineCount += nodes[nodeIndex].lineCount();
+                        }
+                        else {
+                            break;
+                        }
+                        nodeIndex++;
+                    }
+                    interiorNodes[i].totalChars = charCount;
+                    interiorNodes[i].totalLines = lineCount;
+                }
+                if (interiorNodes.length === 1) {
+                    return interiorNodes[0];
+                }
+                else {
+                    return this.buildTreeFromBottom(interiorNodes);
+                }
+            };
+            LineIndex.linesFromText = function (text) {
+                var lineStarts = ts.computeLineStarts(text);
+                if (lineStarts.length === 0) {
+                    return { lines: [], lineMap: lineStarts };
+                }
+                var lines = new Array(lineStarts.length);
+                var lc = lineStarts.length - 1;
+                for (var lmi = 0; lmi < lc; lmi++) {
+                    lines[lmi] = text.substring(lineStarts[lmi], lineStarts[lmi + 1]);
+                }
+                var endText = text.substring(lineStarts[lc]);
+                if (endText.length > 0) {
+                    lines[lc] = endText;
+                }
+                else {
+                    lines.length--;
+                }
+                return { lines: lines, lineMap: lineStarts };
+            };
+            return LineIndex;
+        }());
+        server.LineIndex = LineIndex;
+        var LineNode = (function () {
+            function LineNode() {
+                this.totalChars = 0;
+                this.totalLines = 0;
+                this.children = [];
+            }
+            LineNode.prototype.isLeaf = function () {
+                return false;
+            };
+            LineNode.prototype.updateCounts = function () {
+                this.totalChars = 0;
+                this.totalLines = 0;
+                for (var i = 0, len = this.children.length; i < len; i++) {
+                    var child = this.children[i];
+                    this.totalChars += child.charCount();
+                    this.totalLines += child.lineCount();
+                }
+            };
+            LineNode.prototype.execWalk = function (rangeStart, rangeLength, walkFns, childIndex, nodeType) {
+                if (walkFns.pre) {
+                    walkFns.pre(rangeStart, rangeLength, this.children[childIndex], this, nodeType);
+                }
+                if (walkFns.goSubtree) {
+                    this.children[childIndex].walk(rangeStart, rangeLength, walkFns);
+                    if (walkFns.post) {
+                        walkFns.post(rangeStart, rangeLength, this.children[childIndex], this, nodeType);
+                    }
+                }
+                else {
+                    walkFns.goSubtree = true;
+                }
+                return walkFns.done;
+            };
+            LineNode.prototype.skipChild = function (relativeStart, relativeLength, childIndex, walkFns, nodeType) {
+                if (walkFns.pre && (!walkFns.done)) {
+                    walkFns.pre(relativeStart, relativeLength, this.children[childIndex], this, nodeType);
+                    walkFns.goSubtree = true;
+                }
+            };
+            LineNode.prototype.walk = function (rangeStart, rangeLength, walkFns) {
+                var childIndex = 0;
+                var child = this.children[0];
+                var childCharCount = child.charCount();
+                var adjustedStart = rangeStart;
+                while (adjustedStart >= childCharCount) {
+                    this.skipChild(adjustedStart, rangeLength, childIndex, walkFns, CharRangeSection.PreStart);
+                    adjustedStart -= childCharCount;
+                    childIndex++;
+                    child = this.children[childIndex];
+                    childCharCount = child.charCount();
+                }
+                if ((adjustedStart + rangeLength) <= childCharCount) {
+                    if (this.execWalk(adjustedStart, rangeLength, walkFns, childIndex, CharRangeSection.Entire)) {
+                        return;
+                    }
+                }
+                else {
+                    if (this.execWalk(adjustedStart, childCharCount - adjustedStart, walkFns, childIndex, CharRangeSection.Start)) {
+                        return;
+                    }
+                    var adjustedLength = rangeLength - (childCharCount - adjustedStart);
+                    childIndex++;
+                    child = this.children[childIndex];
+                    childCharCount = child.charCount();
+                    while (adjustedLength > childCharCount) {
+                        if (this.execWalk(0, childCharCount, walkFns, childIndex, CharRangeSection.Mid)) {
+                            return;
+                        }
+                        adjustedLength -= childCharCount;
+                        childIndex++;
+                        child = this.children[childIndex];
+                        childCharCount = child.charCount();
+                    }
+                    if (adjustedLength > 0) {
+                        if (this.execWalk(0, adjustedLength, walkFns, childIndex, CharRangeSection.End)) {
+                            return;
+                        }
+                    }
+                }
+                if (walkFns.pre) {
+                    var clen = this.children.length;
+                    if (childIndex < (clen - 1)) {
+                        for (var ej = childIndex + 1; ej < clen; ej++) {
+                            this.skipChild(0, 0, ej, walkFns, CharRangeSection.PostEnd);
+                        }
+                    }
+                }
+            };
+            LineNode.prototype.charOffsetToLineNumberAndPos = function (lineNumber, charOffset) {
+                var childInfo = this.childFromCharOffset(lineNumber, charOffset);
+                if (!childInfo.child) {
+                    return {
+                        line: lineNumber,
+                        offset: charOffset
+                    };
+                }
+                else if (childInfo.childIndex < this.children.length) {
+                    if (childInfo.child.isLeaf()) {
+                        return {
+                            line: childInfo.lineNumber,
+                            offset: childInfo.charOffset,
+                            text: (childInfo.child).text,
+                            leaf: (childInfo.child)
+                        };
+                    }
+                    else {
+                        var lineNode = (childInfo.child);
+                        return lineNode.charOffsetToLineNumberAndPos(childInfo.lineNumber, childInfo.charOffset);
+                    }
+                }
+                else {
+                    var lineInfo = this.lineNumberToInfo(this.lineCount(), 0);
+                    return { line: this.lineCount(), offset: lineInfo.leaf.charCount() };
+                }
+            };
+            LineNode.prototype.lineNumberToInfo = function (lineNumber, charOffset) {
+                var childInfo = this.childFromLineNumber(lineNumber, charOffset);
+                if (!childInfo.child) {
+                    return {
+                        line: lineNumber,
+                        offset: charOffset
+                    };
+                }
+                else if (childInfo.child.isLeaf()) {
+                    return {
+                        line: lineNumber,
+                        offset: childInfo.charOffset,
+                        text: (childInfo.child).text,
+                        leaf: (childInfo.child)
+                    };
+                }
+                else {
+                    var lineNode = (childInfo.child);
+                    return lineNode.lineNumberToInfo(childInfo.relativeLineNumber, childInfo.charOffset);
+                }
+            };
+            LineNode.prototype.childFromLineNumber = function (lineNumber, charOffset) {
+                var child;
+                var relativeLineNumber = lineNumber;
+                var i;
+                var len;
+                for (i = 0, len = this.children.length; i < len; i++) {
+                    child = this.children[i];
+                    var childLineCount = child.lineCount();
+                    if (childLineCount >= relativeLineNumber) {
+                        break;
+                    }
+                    else {
+                        relativeLineNumber -= childLineCount;
+                        charOffset += child.charCount();
+                    }
+                }
+                return {
+                    child: child,
+                    childIndex: i,
+                    relativeLineNumber: relativeLineNumber,
+                    charOffset: charOffset
+                };
+            };
+            LineNode.prototype.childFromCharOffset = function (lineNumber, charOffset) {
+                var child;
+                var i;
+                var len;
+                for (i = 0, len = this.children.length; i < len; i++) {
+                    child = this.children[i];
+                    if (child.charCount() > charOffset) {
+                        break;
+                    }
+                    else {
+                        charOffset -= child.charCount();
+                        lineNumber += child.lineCount();
+                    }
+                }
+                return {
+                    child: child,
+                    childIndex: i,
+                    charOffset: charOffset,
+                    lineNumber: lineNumber
+                };
+            };
+            LineNode.prototype.splitAfter = function (childIndex) {
+                var splitNode;
+                var clen = this.children.length;
+                childIndex++;
+                var endLength = childIndex;
+                if (childIndex < clen) {
+                    splitNode = new LineNode();
+                    while (childIndex < clen) {
+                        splitNode.add(this.children[childIndex]);
+                        childIndex++;
+                    }
+                    splitNode.updateCounts();
+                }
+                this.children.length = endLength;
+                return splitNode;
+            };
+            LineNode.prototype.remove = function (child) {
+                var childIndex = this.findChildIndex(child);
+                var clen = this.children.length;
+                if (childIndex < (clen - 1)) {
+                    for (var i = childIndex; i < (clen - 1); i++) {
+                        this.children[i] = this.children[i + 1];
+                    }
+                }
+                this.children.length--;
+            };
+            LineNode.prototype.findChildIndex = function (child) {
+                var childIndex = 0;
+                var clen = this.children.length;
+                while ((this.children[childIndex] !== child) && (childIndex < clen))
+                    childIndex++;
+                return childIndex;
+            };
+            LineNode.prototype.insertAt = function (child, nodes) {
+                var childIndex = this.findChildIndex(child);
+                var clen = this.children.length;
+                var nodeCount = nodes.length;
+                if ((clen < lineCollectionCapacity) && (childIndex === (clen - 1)) && (nodeCount === 1)) {
+                    this.add(nodes[0]);
+                    this.updateCounts();
+                    return [];
+                }
+                else {
+                    var shiftNode = this.splitAfter(childIndex);
+                    var nodeIndex = 0;
+                    childIndex++;
+                    while ((childIndex < lineCollectionCapacity) && (nodeIndex < nodeCount)) {
+                        this.children[childIndex] = nodes[nodeIndex];
+                        childIndex++;
+                        nodeIndex++;
+                    }
+                    var splitNodes = [];
+                    var splitNodeCount = 0;
+                    if (nodeIndex < nodeCount) {
+                        splitNodeCount = Math.ceil((nodeCount - nodeIndex) / lineCollectionCapacity);
+                        splitNodes = new Array(splitNodeCount);
+                        var splitNodeIndex = 0;
+                        for (var i = 0; i < splitNodeCount; i++) {
+                            splitNodes[i] = new LineNode();
+                        }
+                        var splitNode = splitNodes[0];
+                        while (nodeIndex < nodeCount) {
+                            splitNode.add(nodes[nodeIndex]);
+                            nodeIndex++;
+                            if (splitNode.children.length === lineCollectionCapacity) {
+                                splitNodeIndex++;
+                                splitNode = splitNodes[splitNodeIndex];
+                            }
+                        }
+                        for (var i = splitNodes.length - 1; i >= 0; i--) {
+                            if (splitNodes[i].children.length === 0) {
+                                splitNodes.length--;
+                            }
+                        }
+                    }
+                    if (shiftNode) {
+                        splitNodes[splitNodes.length] = shiftNode;
+                    }
+                    this.updateCounts();
+                    for (var i = 0; i < splitNodeCount; i++) {
+                        splitNodes[i].updateCounts();
+                    }
+                    return splitNodes;
+                }
+            };
+            LineNode.prototype.add = function (collection) {
+                this.children[this.children.length] = collection;
+                return (this.children.length < lineCollectionCapacity);
+            };
+            LineNode.prototype.charCount = function () {
+                return this.totalChars;
+            };
+            LineNode.prototype.lineCount = function () {
+                return this.totalLines;
+            };
+            return LineNode;
+        }());
+        server.LineNode = LineNode;
+        var LineLeaf = (function () {
+            function LineLeaf(text) {
+                this.text = text;
+            }
+            LineLeaf.prototype.setUdata = function (data) {
+                this.udata = data;
+            };
+            LineLeaf.prototype.getUdata = function () {
+                return this.udata;
+            };
+            LineLeaf.prototype.isLeaf = function () {
+                return true;
+            };
+            LineLeaf.prototype.walk = function (rangeStart, rangeLength, walkFns) {
+                walkFns.leaf(rangeStart, rangeLength, this);
+            };
+            LineLeaf.prototype.charCount = function () {
+                return this.text.length;
+            };
+            LineLeaf.prototype.lineCount = function () {
+                return 1;
+            };
+            return LineLeaf;
+        }());
+        server.LineLeaf = LineLeaf;
+    })(server = ts.server || (ts.server = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var server;
+    (function (server) {
+        var readline = require("readline");
+        var fs = require("fs");
+        var rl = readline.createInterface({
+            input: process.stdin,
+            output: process.stdout,
+            terminal: false
+        });
+        var Logger = (function () {
+            function Logger(logFilename, level) {
+                this.logFilename = logFilename;
+                this.level = level;
+                this.fd = -1;
+                this.seq = 0;
+                this.inGroup = false;
+                this.firstInGroup = true;
+            }
+            Logger.padStringRight = function (str, padding) {
+                return (str + padding).slice(0, padding.length);
+            };
+            Logger.prototype.close = function () {
+                if (this.fd >= 0) {
+                    fs.close(this.fd);
+                }
+            };
+            Logger.prototype.perftrc = function (s) {
+                this.msg(s, "Perf");
+            };
+            Logger.prototype.info = function (s) {
+                this.msg(s, "Info");
+            };
+            Logger.prototype.startGroup = function () {
+                this.inGroup = true;
+                this.firstInGroup = true;
+            };
+            Logger.prototype.endGroup = function () {
+                this.inGroup = false;
+                this.seq++;
+                this.firstInGroup = true;
+            };
+            Logger.prototype.loggingEnabled = function () {
+                return !!this.logFilename;
+            };
+            Logger.prototype.isVerbose = function () {
+                return this.loggingEnabled() && (this.level == "verbose");
+            };
+            Logger.prototype.msg = function (s, type) {
+                if (type === void 0) { type = "Err"; }
+                if (this.fd < 0) {
+                    if (this.logFilename) {
+                        this.fd = fs.openSync(this.logFilename, "w");
+                    }
+                }
+                if (this.fd >= 0) {
+                    s = s + "\n";
+                    var prefix = Logger.padStringRight(type + " " + this.seq.toString(), "          ");
+                    if (this.firstInGroup) {
+                        s = prefix + s;
+                        this.firstInGroup = false;
+                    }
+                    if (!this.inGroup) {
+                        this.seq++;
+                        this.firstInGroup = true;
+                    }
+                    var buf = new Buffer(s);
+                    fs.writeSync(this.fd, buf, 0, buf.length, null);
+                }
+            };
+            return Logger;
+        }());
+        var IOSession = (function (_super) {
+            __extends(IOSession, _super);
+            function IOSession(host, logger) {
+                _super.call(this, host, Buffer.byteLength, process.hrtime, logger);
+            }
+            IOSession.prototype.exit = function () {
+                this.projectService.log("Exiting...", "Info");
+                this.projectService.closeLog();
+                process.exit(0);
+            };
+            IOSession.prototype.listen = function () {
+                var _this = this;
+                rl.on("line", function (input) {
+                    var message = input.trim();
+                    _this.onMessage(message);
+                });
+                rl.on("close", function () {
+                    _this.exit();
+                });
+            };
+            return IOSession;
+        }(server.Session));
+        function parseLoggingEnvironmentString(logEnvStr) {
+            var logEnv = {};
+            var args = logEnvStr.split(" ");
+            for (var i = 0, len = args.length; i < (len - 1); i += 2) {
+                var option = args[i];
+                var value = args[i + 1];
+                if (option && value) {
+                    switch (option) {
+                        case "-file":
+                            logEnv.file = value;
+                            break;
+                        case "-level":
+                            logEnv.detailLevel = value;
+                            break;
+                    }
+                }
+            }
+            return logEnv;
+        }
+        function createLoggerFromEnv() {
+            var fileName = undefined;
+            var detailLevel = "normal";
+            var logEnvStr = process.env["TSS_LOG"];
+            if (logEnvStr) {
+                var logEnv = parseLoggingEnvironmentString(logEnvStr);
+                if (logEnv.file) {
+                    fileName = logEnv.file;
+                }
+                else {
+                    fileName = __dirname + "/.log" + process.pid.toString();
+                }
+                if (logEnv.detailLevel) {
+                    detailLevel = logEnv.detailLevel;
+                }
+            }
+            return new Logger(fileName, detailLevel);
+        }
+        function createPollingWatchedFileSet(interval, chunkSize) {
+            if (interval === void 0) { interval = 2500; }
+            if (chunkSize === void 0) { chunkSize = 30; }
+            var watchedFiles = [];
+            var nextFileToCheck = 0;
+            var watchTimer;
+            function getModifiedTime(fileName) {
+                return fs.statSync(fileName).mtime;
+            }
+            function poll(checkedIndex) {
+                var watchedFile = watchedFiles[checkedIndex];
+                if (!watchedFile) {
+                    return;
+                }
+                fs.stat(watchedFile.fileName, function (err, stats) {
+                    if (err) {
+                        watchedFile.callback(watchedFile.fileName);
+                    }
+                    else if (watchedFile.mtime.getTime() !== stats.mtime.getTime()) {
+                        watchedFile.mtime = getModifiedTime(watchedFile.fileName);
+                        watchedFile.callback(watchedFile.fileName, watchedFile.mtime.getTime() === 0);
+                    }
+                });
+            }
+            function startWatchTimer() {
+                watchTimer = setInterval(function () {
+                    var count = 0;
+                    var nextToCheck = nextFileToCheck;
+                    var firstCheck = -1;
+                    while ((count < chunkSize) && (nextToCheck !== firstCheck)) {
+                        poll(nextToCheck);
+                        if (firstCheck < 0) {
+                            firstCheck = nextToCheck;
+                        }
+                        nextToCheck++;
+                        if (nextToCheck === watchedFiles.length) {
+                            nextToCheck = 0;
+                        }
+                        count++;
+                    }
+                    nextFileToCheck = nextToCheck;
+                }, interval);
+            }
+            function addFile(fileName, callback) {
+                var file = {
+                    fileName: fileName,
+                    callback: callback,
+                    mtime: getModifiedTime(fileName)
+                };
+                watchedFiles.push(file);
+                if (watchedFiles.length === 1) {
+                    startWatchTimer();
+                }
+                return file;
+            }
+            function removeFile(file) {
+                watchedFiles = ts.copyListRemovingItem(file, watchedFiles);
+            }
+            return {
+                getModifiedTime: getModifiedTime,
+                poll: poll,
+                startWatchTimer: startWatchTimer,
+                addFile: addFile,
+                removeFile: removeFile
+            };
+        }
+        var pollingWatchedFileSet = createPollingWatchedFileSet();
+        var logger = createLoggerFromEnv();
+        var pending = [];
+        var canWrite = true;
+        function writeMessage(s) {
+            if (!canWrite) {
+                pending.push(s);
+            }
+            else {
+                canWrite = false;
+                process.stdout.write(new Buffer(s, "utf8"), setCanWriteFlagAndWriteMessageIfNecessary);
+            }
+        }
+        function setCanWriteFlagAndWriteMessageIfNecessary() {
+            canWrite = true;
+            if (pending.length) {
+                writeMessage(pending.shift());
+            }
+        }
+        var sys = ts.sys;
+        sys.write = function (s) { return writeMessage(s); };
+        sys.watchFile = function (fileName, callback) {
+            var watchedFile = pollingWatchedFileSet.addFile(fileName, callback);
+            return {
+                close: function () { return pollingWatchedFileSet.removeFile(watchedFile); }
+            };
+        };
+        sys.setTimeout = setTimeout;
+        sys.clearTimeout = clearTimeout;
+        var ioSession = new IOSession(sys, logger);
+        process.on("uncaughtException", function (err) {
+            ioSession.logError(err, "unknown");
+        });
+        ioSession.listen();
+    })(server = ts.server || (ts.server = {}));
+})(ts || (ts = {}));
+var debugObjectHost = this;
+var ts;
+(function (ts) {
+    function logInternalError(logger, err) {
+        if (logger) {
+            logger.log("*INTERNAL ERROR* - Exception in typescript services: " + err.message);
+        }
+    }
+    var ScriptSnapshotShimAdapter = (function () {
+        function ScriptSnapshotShimAdapter(scriptSnapshotShim) {
+            this.scriptSnapshotShim = scriptSnapshotShim;
+        }
+        ScriptSnapshotShimAdapter.prototype.getText = function (start, end) {
+            return this.scriptSnapshotShim.getText(start, end);
+        };
+        ScriptSnapshotShimAdapter.prototype.getLength = function () {
+            return this.scriptSnapshotShim.getLength();
+        };
+        ScriptSnapshotShimAdapter.prototype.getChangeRange = function (oldSnapshot) {
+            var oldSnapshotShim = oldSnapshot;
+            var encoded = this.scriptSnapshotShim.getChangeRange(oldSnapshotShim.scriptSnapshotShim);
+            if (encoded == null) {
+                return null;
+            }
+            var decoded = JSON.parse(encoded);
+            return ts.createTextChangeRange(ts.createTextSpan(decoded.span.start, decoded.span.length), decoded.newLength);
+        };
+        ScriptSnapshotShimAdapter.prototype.dispose = function () {
+            if ("dispose" in this.scriptSnapshotShim) {
+                this.scriptSnapshotShim.dispose();
+            }
+        };
+        return ScriptSnapshotShimAdapter;
+    }());
+    var LanguageServiceShimHostAdapter = (function () {
+        function LanguageServiceShimHostAdapter(shimHost) {
+            var _this = this;
+            this.shimHost = shimHost;
+            this.loggingEnabled = false;
+            this.tracingEnabled = false;
+            if ("getModuleResolutionsForFile" in this.shimHost) {
+                this.resolveModuleNames = function (moduleNames, containingFile) {
+                    var resolutionsInFile = JSON.parse(_this.shimHost.getModuleResolutionsForFile(containingFile));
+                    return ts.map(moduleNames, function (name) {
+                        var result = ts.lookUp(resolutionsInFile, name);
+                        return result ? { resolvedFileName: result } : undefined;
+                    });
+                };
+            }
+            if ("directoryExists" in this.shimHost) {
+                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
+            }
+            if ("getTypeReferenceDirectiveResolutionsForFile" in this.shimHost) {
+                this.resolveTypeReferenceDirectives = function (typeDirectiveNames, containingFile) {
+                    var typeDirectivesForFile = JSON.parse(_this.shimHost.getTypeReferenceDirectiveResolutionsForFile(containingFile));
+                    return ts.map(typeDirectiveNames, function (name) { return ts.lookUp(typeDirectivesForFile, name); });
+                };
+            }
+        }
+        LanguageServiceShimHostAdapter.prototype.log = function (s) {
+            if (this.loggingEnabled) {
+                this.shimHost.log(s);
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.trace = function (s) {
+            if (this.tracingEnabled) {
+                this.shimHost.trace(s);
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.error = function (s) {
+            this.shimHost.error(s);
+        };
+        LanguageServiceShimHostAdapter.prototype.getProjectVersion = function () {
+            if (!this.shimHost.getProjectVersion) {
+                return undefined;
+            }
+            return this.shimHost.getProjectVersion();
+        };
+        LanguageServiceShimHostAdapter.prototype.useCaseSensitiveFileNames = function () {
+            return this.shimHost.useCaseSensitiveFileNames ? this.shimHost.useCaseSensitiveFileNames() : false;
+        };
+        LanguageServiceShimHostAdapter.prototype.getCompilationSettings = function () {
+            var settingsJson = this.shimHost.getCompilationSettings();
+            if (settingsJson == null || settingsJson == "") {
+                throw Error("LanguageServiceShimHostAdapter.getCompilationSettings: empty compilationSettings");
+            }
+            return JSON.parse(settingsJson);
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptFileNames = function () {
+            var encoded = this.shimHost.getScriptFileNames();
+            return this.files = JSON.parse(encoded);
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptSnapshot = function (fileName) {
+            var scriptSnapshot = this.shimHost.getScriptSnapshot(fileName);
+            return scriptSnapshot && new ScriptSnapshotShimAdapter(scriptSnapshot);
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptKind = function (fileName) {
+            if ("getScriptKind" in this.shimHost) {
+                return this.shimHost.getScriptKind(fileName);
+            }
+            else {
+                return 0;
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptVersion = function (fileName) {
+            return this.shimHost.getScriptVersion(fileName);
+        };
+        LanguageServiceShimHostAdapter.prototype.getLocalizedDiagnosticMessages = function () {
+            var diagnosticMessagesJson = this.shimHost.getLocalizedDiagnosticMessages();
+            if (diagnosticMessagesJson == null || diagnosticMessagesJson == "") {
+                return null;
+            }
+            try {
+                return JSON.parse(diagnosticMessagesJson);
+            }
+            catch (e) {
+                this.log(e.description || "diagnosticMessages.generated.json has invalid JSON format");
+                return null;
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.getCancellationToken = function () {
+            var hostCancellationToken = this.shimHost.getCancellationToken();
+            return new ThrottledCancellationToken(hostCancellationToken);
+        };
+        LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
+            return this.shimHost.getCurrentDirectory();
+        };
+        LanguageServiceShimHostAdapter.prototype.getDirectories = function (path) {
+            return this.shimHost.getDirectories(path);
+        };
+        LanguageServiceShimHostAdapter.prototype.getDefaultLibFileName = function (options) {
+            return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
+        };
+        return LanguageServiceShimHostAdapter;
+    }());
+    ts.LanguageServiceShimHostAdapter = LanguageServiceShimHostAdapter;
+    var ThrottledCancellationToken = (function () {
+        function ThrottledCancellationToken(hostCancellationToken) {
+            this.hostCancellationToken = hostCancellationToken;
+            this.lastCancellationCheckTime = 0;
+        }
+        ThrottledCancellationToken.prototype.isCancellationRequested = function () {
+            var time = Date.now();
+            var duration = Math.abs(time - this.lastCancellationCheckTime);
+            if (duration > 10) {
+                this.lastCancellationCheckTime = time;
+                return this.hostCancellationToken.isCancellationRequested();
+            }
+            return false;
+        };
+        return ThrottledCancellationToken;
+    }());
+    var CoreServicesShimHostAdapter = (function () {
+        function CoreServicesShimHostAdapter(shimHost) {
+            var _this = this;
+            this.shimHost = shimHost;
+            if ("directoryExists" in this.shimHost) {
+                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
+            }
+            if ("realpath" in this.shimHost) {
+                this.realpath = function (path) { return _this.shimHost.realpath(path); };
+            }
+        }
+        CoreServicesShimHostAdapter.prototype.readDirectory = function (rootDir, extension, exclude, depth) {
+            var encoded;
+            try {
+                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude), depth);
+            }
+            catch (e) {
+                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude));
+            }
+            return JSON.parse(encoded);
+        };
+        CoreServicesShimHostAdapter.prototype.fileExists = function (fileName) {
+            return this.shimHost.fileExists(fileName);
+        };
+        CoreServicesShimHostAdapter.prototype.readFile = function (fileName) {
+            return this.shimHost.readFile(fileName);
+        };
+        return CoreServicesShimHostAdapter;
+    }());
+    ts.CoreServicesShimHostAdapter = CoreServicesShimHostAdapter;
+    function simpleForwardCall(logger, actionDescription, action, logPerformance) {
+        var start;
+        if (logPerformance) {
+            logger.log(actionDescription);
+            start = Date.now();
+        }
+        var result = action();
+        if (logPerformance) {
+            var end = Date.now();
+            logger.log(actionDescription + " completed in " + (end - start) + " msec");
+            if (typeof result === "string") {
+                var str = result;
+                if (str.length > 128) {
+                    str = str.substring(0, 128) + "...";
+                }
+                logger.log("  result.length=" + str.length + ", result='" + JSON.stringify(str) + "'");
+            }
+        }
+        return result;
+    }
+    function forwardJSONCall(logger, actionDescription, action, logPerformance) {
+        try {
+            var result = simpleForwardCall(logger, actionDescription, action, logPerformance);
+            return JSON.stringify({ result: result });
+        }
+        catch (err) {
+            if (err instanceof ts.OperationCanceledException) {
+                return JSON.stringify({ canceled: true });
+            }
+            logInternalError(logger, err);
+            err.description = actionDescription;
+            return JSON.stringify({ error: err });
+        }
+    }
+    var ShimBase = (function () {
+        function ShimBase(factory) {
+            this.factory = factory;
+            factory.registerShim(this);
+        }
+        ShimBase.prototype.dispose = function (dummy) {
+            this.factory.unregisterShim(this);
+        };
+        return ShimBase;
+    }());
+    function realizeDiagnostics(diagnostics, newLine) {
+        return diagnostics.map(function (d) { return realizeDiagnostic(d, newLine); });
+    }
+    ts.realizeDiagnostics = realizeDiagnostics;
+    function realizeDiagnostic(diagnostic, newLine) {
+        return {
+            message: ts.flattenDiagnosticMessageText(diagnostic.messageText, newLine),
+            start: diagnostic.start,
+            length: diagnostic.length,
+            category: ts.DiagnosticCategory[diagnostic.category].toLowerCase(),
+            code: diagnostic.code
+        };
+    }
+    var LanguageServiceShimObject = (function (_super) {
+        __extends(LanguageServiceShimObject, _super);
+        function LanguageServiceShimObject(factory, host, languageService) {
+            _super.call(this, factory);
+            this.host = host;
+            this.languageService = languageService;
+            this.logPerformance = false;
+            this.logger = this.host;
+        }
+        LanguageServiceShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
+            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
+        };
+        LanguageServiceShimObject.prototype.dispose = function (dummy) {
+            this.logger.log("dispose()");
+            this.languageService.dispose();
+            this.languageService = null;
+            if (debugObjectHost && debugObjectHost.CollectGarbage) {
+                debugObjectHost.CollectGarbage();
+                this.logger.log("CollectGarbage()");
+            }
+            this.logger = null;
+            _super.prototype.dispose.call(this, dummy);
+        };
+        LanguageServiceShimObject.prototype.refresh = function (throwOnError) {
+            this.forwardJSONCall("refresh(" + throwOnError + ")", function () { return null; });
+        };
+        LanguageServiceShimObject.prototype.cleanupSemanticCache = function () {
+            var _this = this;
+            this.forwardJSONCall("cleanupSemanticCache()", function () {
+                _this.languageService.cleanupSemanticCache();
+                return null;
+            });
+        };
+        LanguageServiceShimObject.prototype.realizeDiagnostics = function (diagnostics) {
+            var newLine = ts.getNewLineOrDefaultFromHost(this.host);
+            return ts.realizeDiagnostics(diagnostics, newLine);
+        };
+        LanguageServiceShimObject.prototype.getSyntacticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSyntacticClassifications(fileName, ts.createTextSpan(start, length)); });
+        };
+        LanguageServiceShimObject.prototype.getSemanticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSemanticClassifications(fileName, ts.createTextSpan(start, length)); });
+        };
+        LanguageServiceShimObject.prototype.getEncodedSyntacticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getEncodedSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return convertClassifications(_this.languageService.getEncodedSyntacticClassifications(fileName, ts.createTextSpan(start, length))); });
+        };
+        LanguageServiceShimObject.prototype.getEncodedSemanticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getEncodedSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return convertClassifications(_this.languageService.getEncodedSemanticClassifications(fileName, ts.createTextSpan(start, length))); });
+        };
+        LanguageServiceShimObject.prototype.getSyntacticDiagnostics = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getSyntacticDiagnostics('" + fileName + "')", function () {
+                var diagnostics = _this.languageService.getSyntacticDiagnostics(fileName);
+                return _this.realizeDiagnostics(diagnostics);
+            });
+        };
+        LanguageServiceShimObject.prototype.getSemanticDiagnostics = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getSemanticDiagnostics('" + fileName + "')", function () {
+                var diagnostics = _this.languageService.getSemanticDiagnostics(fileName);
+                return _this.realizeDiagnostics(diagnostics);
+            });
+        };
+        LanguageServiceShimObject.prototype.getCompilerOptionsDiagnostics = function () {
+            var _this = this;
+            return this.forwardJSONCall("getCompilerOptionsDiagnostics()", function () {
+                var diagnostics = _this.languageService.getCompilerOptionsDiagnostics();
+                return _this.realizeDiagnostics(diagnostics);
+            });
+        };
+        LanguageServiceShimObject.prototype.getQuickInfoAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getQuickInfoAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getQuickInfoAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getNameOrDottedNameSpan = function (fileName, startPos, endPos) {
+            var _this = this;
+            return this.forwardJSONCall("getNameOrDottedNameSpan('" + fileName + "', " + startPos + ", " + endPos + ")", function () { return _this.languageService.getNameOrDottedNameSpan(fileName, startPos, endPos); });
+        };
+        LanguageServiceShimObject.prototype.getBreakpointStatementAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getBreakpointStatementAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBreakpointStatementAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getSignatureHelpItems = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getSignatureHelpItems('" + fileName + "', " + position + ")", function () { return _this.languageService.getSignatureHelpItems(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getDefinitionAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDefinitionAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getTypeDefinitionAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getTypeDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getTypeDefinitionAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getRenameInfo = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getRenameInfo('" + fileName + "', " + position + ")", function () { return _this.languageService.getRenameInfo(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.findRenameLocations = function (fileName, position, findInStrings, findInComments) {
+            var _this = this;
+            return this.forwardJSONCall("findRenameLocations('" + fileName + "', " + position + ", " + findInStrings + ", " + findInComments + ")", function () { return _this.languageService.findRenameLocations(fileName, position, findInStrings, findInComments); });
+        };
+        LanguageServiceShimObject.prototype.getBraceMatchingAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getBraceMatchingAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBraceMatchingAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.isValidBraceCompletionAtPostion = function (fileName, position, openingBrace) {
+            var _this = this;
+            return this.forwardJSONCall("isValidBraceCompletionAtPostion('" + fileName + "', " + position + ", " + openingBrace + ")", function () { return _this.languageService.isValidBraceCompletionAtPostion(fileName, position, openingBrace); });
+        };
+        LanguageServiceShimObject.prototype.getIndentationAtPosition = function (fileName, position, options) {
+            var _this = this;
+            return this.forwardJSONCall("getIndentationAtPosition('" + fileName + "', " + position + ")", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getIndentationAtPosition(fileName, position, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getReferencesAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getReferencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getReferencesAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.findReferences = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("findReferences('" + fileName + "', " + position + ")", function () { return _this.languageService.findReferences(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getOccurrencesAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getOccurrencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getOccurrencesAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getDocumentHighlights = function (fileName, position, filesToSearch) {
+            var _this = this;
+            return this.forwardJSONCall("getDocumentHighlights('" + fileName + "', " + position + ")", function () {
+                var results = _this.languageService.getDocumentHighlights(fileName, position, JSON.parse(filesToSearch));
+                var normalizedName = ts.normalizeSlashes(fileName).toLowerCase();
+                return ts.filter(results, function (r) { return ts.normalizeSlashes(r.fileName).toLowerCase() === normalizedName; });
+            });
+        };
+        LanguageServiceShimObject.prototype.getCompletionsAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getCompletionsAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getCompletionsAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getCompletionEntryDetails = function (fileName, position, entryName) {
+            var _this = this;
+            return this.forwardJSONCall("getCompletionEntryDetails('" + fileName + "', " + position + ", '" + entryName + "')", function () { return _this.languageService.getCompletionEntryDetails(fileName, position, entryName); });
+        };
+        LanguageServiceShimObject.prototype.getFormattingEditsForRange = function (fileName, start, end, options) {
+            var _this = this;
+            return this.forwardJSONCall("getFormattingEditsForRange('" + fileName + "', " + start + ", " + end + ")", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getFormattingEditsForRange(fileName, start, end, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getFormattingEditsForDocument = function (fileName, options) {
+            var _this = this;
+            return this.forwardJSONCall("getFormattingEditsForDocument('" + fileName + "')", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getFormattingEditsForDocument(fileName, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getFormattingEditsAfterKeystroke = function (fileName, position, key, options) {
+            var _this = this;
+            return this.forwardJSONCall("getFormattingEditsAfterKeystroke('" + fileName + "', " + position + ", '" + key + "')", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getFormattingEditsAfterKeystroke(fileName, position, key, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getDocCommentTemplateAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getDocCommentTemplateAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDocCommentTemplateAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getNavigateToItems = function (searchValue, maxResultCount) {
+            var _this = this;
+            return this.forwardJSONCall("getNavigateToItems('" + searchValue + "', " + maxResultCount + ")", function () { return _this.languageService.getNavigateToItems(searchValue, maxResultCount); });
+        };
+        LanguageServiceShimObject.prototype.getNavigationBarItems = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getNavigationBarItems('" + fileName + "')", function () { return _this.languageService.getNavigationBarItems(fileName); });
+        };
+        LanguageServiceShimObject.prototype.getOutliningSpans = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getOutliningSpans('" + fileName + "')", function () { return _this.languageService.getOutliningSpans(fileName); });
+        };
+        LanguageServiceShimObject.prototype.getTodoComments = function (fileName, descriptors) {
+            var _this = this;
+            return this.forwardJSONCall("getTodoComments('" + fileName + "')", function () { return _this.languageService.getTodoComments(fileName, JSON.parse(descriptors)); });
+        };
+        LanguageServiceShimObject.prototype.getEmitOutput = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getEmitOutput('" + fileName + "')", function () { return _this.languageService.getEmitOutput(fileName); });
+        };
+        return LanguageServiceShimObject;
+    }(ShimBase));
+    function convertClassifications(classifications) {
+        return { spans: classifications.spans.join(","), endOfLineState: classifications.endOfLineState };
+    }
+    var ClassifierShimObject = (function (_super) {
+        __extends(ClassifierShimObject, _super);
+        function ClassifierShimObject(factory, logger) {
+            _super.call(this, factory);
+            this.logger = logger;
+            this.logPerformance = false;
+            this.classifier = ts.createClassifier();
+        }
+        ClassifierShimObject.prototype.getEncodedLexicalClassifications = function (text, lexState, syntacticClassifierAbsent) {
+            var _this = this;
+            return forwardJSONCall(this.logger, "getEncodedLexicalClassifications", function () { return convertClassifications(_this.classifier.getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent)); }, this.logPerformance);
+        };
+        ClassifierShimObject.prototype.getClassificationsForLine = function (text, lexState, classifyKeywordsInGenerics) {
+            var classification = this.classifier.getClassificationsForLine(text, lexState, classifyKeywordsInGenerics);
+            var result = "";
+            for (var _i = 0, _a = classification.entries; _i < _a.length; _i++) {
+                var item = _a[_i];
+                result += item.length + "\n";
+                result += item.classification + "\n";
+            }
+            result += classification.finalLexState;
+            return result;
+        };
+        return ClassifierShimObject;
+    }(ShimBase));
+    var CoreServicesShimObject = (function (_super) {
+        __extends(CoreServicesShimObject, _super);
+        function CoreServicesShimObject(factory, logger, host) {
+            _super.call(this, factory);
+            this.logger = logger;
+            this.host = host;
+            this.logPerformance = false;
+        }
+        CoreServicesShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
+            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
+        };
+        CoreServicesShimObject.prototype.resolveModuleName = function (fileName, moduleName, compilerOptionsJson) {
+            var _this = this;
+            return this.forwardJSONCall("resolveModuleName('" + fileName + "')", function () {
+                var compilerOptions = JSON.parse(compilerOptionsJson);
+                var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
+                return {
+                    resolvedFileName: result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined,
+                    failedLookupLocations: result.failedLookupLocations
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.resolveTypeReferenceDirective = function (fileName, typeReferenceDirective, compilerOptionsJson) {
+            var _this = this;
+            return this.forwardJSONCall("resolveTypeReferenceDirective(" + fileName + ")", function () {
+                var compilerOptions = JSON.parse(compilerOptionsJson);
+                var result = ts.resolveTypeReferenceDirective(typeReferenceDirective, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
+                return {
+                    resolvedFileName: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.resolvedFileName : undefined,
+                    primary: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.primary : true,
+                    failedLookupLocations: result.failedLookupLocations
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.getPreProcessedFileInfo = function (fileName, sourceTextSnapshot) {
+            var _this = this;
+            return this.forwardJSONCall("getPreProcessedFileInfo('" + fileName + "')", function () {
+                var result = ts.preProcessFile(sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength()), true, true);
+                return {
+                    referencedFiles: _this.convertFileReferences(result.referencedFiles),
+                    importedFiles: _this.convertFileReferences(result.importedFiles),
+                    ambientExternalModules: result.ambientExternalModules,
+                    isLibFile: result.isLibFile,
+                    typeReferenceDirectives: _this.convertFileReferences(result.typeReferenceDirectives)
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.convertFileReferences = function (refs) {
+            if (!refs) {
+                return undefined;
+            }
+            var result = [];
+            for (var _i = 0, refs_2 = refs; _i < refs_2.length; _i++) {
+                var ref = refs_2[_i];
+                result.push({
+                    path: ts.normalizeSlashes(ref.fileName),
+                    position: ref.pos,
+                    length: ref.end - ref.pos
+                });
+            }
+            return result;
+        };
+        CoreServicesShimObject.prototype.getTSConfigFileInfo = function (fileName, sourceTextSnapshot) {
+            var _this = this;
+            return this.forwardJSONCall("getTSConfigFileInfo('" + fileName + "')", function () {
+                var text = sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength());
+                var result = ts.parseConfigFileTextToJson(fileName, text);
+                if (result.error) {
+                    return {
+                        options: {},
+                        typingOptions: {},
+                        files: [],
+                        raw: {},
+                        errors: [realizeDiagnostic(result.error, "\r\n")]
+                    };
+                }
+                var normalizedFileName = ts.normalizeSlashes(fileName);
+                var configFile = ts.parseJsonConfigFileContent(result.config, _this.host, ts.getDirectoryPath(normalizedFileName), {}, normalizedFileName);
+                return {
+                    options: configFile.options,
+                    typingOptions: configFile.typingOptions,
+                    files: configFile.fileNames,
+                    raw: configFile.raw,
+                    errors: realizeDiagnostics(configFile.errors, "\r\n")
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.getDefaultCompilationSettings = function () {
+            return this.forwardJSONCall("getDefaultCompilationSettings()", function () { return ts.getDefaultCompilerOptions(); });
+        };
+        CoreServicesShimObject.prototype.discoverTypings = function (discoverTypingsJson) {
+            var _this = this;
+            var getCanonicalFileName = ts.createGetCanonicalFileName(false);
+            return this.forwardJSONCall("discoverTypings()", function () {
+                var info = JSON.parse(discoverTypingsJson);
+                return ts.JsTyping.discoverTypings(_this.host, info.fileNames, ts.toPath(info.projectRootPath, info.projectRootPath, getCanonicalFileName), ts.toPath(info.safeListPath, info.safeListPath, getCanonicalFileName), info.packageNameToTypingLocation, info.typingOptions, info.compilerOptions);
+            });
+        };
+        return CoreServicesShimObject;
+    }(ShimBase));
+    var TypeScriptServicesFactory = (function () {
+        function TypeScriptServicesFactory() {
+            this._shims = [];
+        }
+        TypeScriptServicesFactory.prototype.getServicesVersion = function () {
+            return ts.servicesVersion;
+        };
+        TypeScriptServicesFactory.prototype.createLanguageServiceShim = function (host) {
+            try {
+                if (this.documentRegistry === undefined) {
+                    this.documentRegistry = ts.createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory());
+                }
+                var hostAdapter = new LanguageServiceShimHostAdapter(host);
+                var languageService = ts.createLanguageService(hostAdapter, this.documentRegistry);
+                return new LanguageServiceShimObject(this, host, languageService);
+            }
+            catch (err) {
+                logInternalError(host, err);
+                throw err;
+            }
+        };
+        TypeScriptServicesFactory.prototype.createClassifierShim = function (logger) {
+            try {
+                return new ClassifierShimObject(this, logger);
+            }
+            catch (err) {
+                logInternalError(logger, err);
+                throw err;
+            }
+        };
+        TypeScriptServicesFactory.prototype.createCoreServicesShim = function (host) {
+            try {
+                var adapter = new CoreServicesShimHostAdapter(host);
+                return new CoreServicesShimObject(this, host, adapter);
+            }
+            catch (err) {
+                logInternalError(host, err);
+                throw err;
+            }
+        };
+        TypeScriptServicesFactory.prototype.close = function () {
+            this._shims = [];
+            this.documentRegistry = undefined;
+        };
+        TypeScriptServicesFactory.prototype.registerShim = function (shim) {
+            this._shims.push(shim);
+        };
+        TypeScriptServicesFactory.prototype.unregisterShim = function (shim) {
+            for (var i = 0, n = this._shims.length; i < n; i++) {
+                if (this._shims[i] === shim) {
+                    delete this._shims[i];
+                    return;
+                }
+            }
+            throw new Error("Invalid operation");
+        };
+        return TypeScriptServicesFactory;
+    }());
+    ts.TypeScriptServicesFactory = TypeScriptServicesFactory;
+    if (typeof module !== "undefined" && module.exports) {
+        module.exports = ts;
+    }
+})(ts || (ts = {}));
+var TypeScript;
+(function (TypeScript) {
+    var Services;
+    (function (Services) {
+        Services.TypeScriptServicesFactory = ts.TypeScriptServicesFactory;
+    })(Services = TypeScript.Services || (TypeScript.Services = {}));
+})(TypeScript || (TypeScript = {}));
+var toolsVersion = "1.9";
diff --git a/lib/tsserverlibrary.d.ts b/lib/tsserverlibrary.d.ts
index 2f97dac5c91..e8eae372528 100644
--- a/lib/tsserverlibrary.d.ts
+++ b/lib/tsserverlibrary.d.ts
@@ -1,8648 +1,8715 @@
-/// <reference path="../../src/server/protocol.d.ts" />
-declare namespace ts {
-    interface Map<T> {
-        [index: string]: T;
-    }
-    type Path = string & {
-        __pathBrand: any;
-    };
-    interface FileMap<T> {
-        get(fileName: Path): T;
-        set(fileName: Path, value: T): void;
-        contains(fileName: Path): boolean;
-        remove(fileName: Path): void;
-        forEachValue(f: (key: Path, v: T) => void): void;
-        clear(): void;
-    }
-    interface TextRange {
-        pos: number;
-        end: number;
-    }
-    const enum SyntaxKind {
-        Unknown = 0,
-        EndOfFileToken = 1,
-        SingleLineCommentTrivia = 2,
-        MultiLineCommentTrivia = 3,
-        NewLineTrivia = 4,
-        WhitespaceTrivia = 5,
-        ShebangTrivia = 6,
-        ConflictMarkerTrivia = 7,
-        NumericLiteral = 8,
-        StringLiteral = 9,
-        RegularExpressionLiteral = 10,
-        NoSubstitutionTemplateLiteral = 11,
-        TemplateHead = 12,
-        TemplateMiddle = 13,
-        TemplateTail = 14,
-        OpenBraceToken = 15,
-        CloseBraceToken = 16,
-        OpenParenToken = 17,
-        CloseParenToken = 18,
-        OpenBracketToken = 19,
-        CloseBracketToken = 20,
-        DotToken = 21,
-        DotDotDotToken = 22,
-        SemicolonToken = 23,
-        CommaToken = 24,
-        LessThanToken = 25,
-        LessThanSlashToken = 26,
-        GreaterThanToken = 27,
-        LessThanEqualsToken = 28,
-        GreaterThanEqualsToken = 29,
-        EqualsEqualsToken = 30,
-        ExclamationEqualsToken = 31,
-        EqualsEqualsEqualsToken = 32,
-        ExclamationEqualsEqualsToken = 33,
-        EqualsGreaterThanToken = 34,
-        PlusToken = 35,
-        MinusToken = 36,
-        AsteriskToken = 37,
-        AsteriskAsteriskToken = 38,
-        SlashToken = 39,
-        PercentToken = 40,
-        PlusPlusToken = 41,
-        MinusMinusToken = 42,
-        LessThanLessThanToken = 43,
-        GreaterThanGreaterThanToken = 44,
-        GreaterThanGreaterThanGreaterThanToken = 45,
-        AmpersandToken = 46,
-        BarToken = 47,
-        CaretToken = 48,
-        ExclamationToken = 49,
-        TildeToken = 50,
-        AmpersandAmpersandToken = 51,
-        BarBarToken = 52,
-        QuestionToken = 53,
-        ColonToken = 54,
-        AtToken = 55,
-        EqualsToken = 56,
-        PlusEqualsToken = 57,
-        MinusEqualsToken = 58,
-        AsteriskEqualsToken = 59,
-        AsteriskAsteriskEqualsToken = 60,
-        SlashEqualsToken = 61,
-        PercentEqualsToken = 62,
-        LessThanLessThanEqualsToken = 63,
-        GreaterThanGreaterThanEqualsToken = 64,
-        GreaterThanGreaterThanGreaterThanEqualsToken = 65,
-        AmpersandEqualsToken = 66,
-        BarEqualsToken = 67,
-        CaretEqualsToken = 68,
-        Identifier = 69,
-        BreakKeyword = 70,
-        CaseKeyword = 71,
-        CatchKeyword = 72,
-        ClassKeyword = 73,
-        ConstKeyword = 74,
-        ContinueKeyword = 75,
-        DebuggerKeyword = 76,
-        DefaultKeyword = 77,
-        DeleteKeyword = 78,
-        DoKeyword = 79,
-        ElseKeyword = 80,
-        EnumKeyword = 81,
-        ExportKeyword = 82,
-        ExtendsKeyword = 83,
-        FalseKeyword = 84,
-        FinallyKeyword = 85,
-        ForKeyword = 86,
-        FunctionKeyword = 87,
-        IfKeyword = 88,
-        ImportKeyword = 89,
-        InKeyword = 90,
-        InstanceOfKeyword = 91,
-        NewKeyword = 92,
-        NullKeyword = 93,
-        ReturnKeyword = 94,
-        SuperKeyword = 95,
-        SwitchKeyword = 96,
-        ThisKeyword = 97,
-        ThrowKeyword = 98,
-        TrueKeyword = 99,
-        TryKeyword = 100,
-        TypeOfKeyword = 101,
-        VarKeyword = 102,
-        VoidKeyword = 103,
-        WhileKeyword = 104,
-        WithKeyword = 105,
-        ImplementsKeyword = 106,
-        InterfaceKeyword = 107,
-        LetKeyword = 108,
-        PackageKeyword = 109,
-        PrivateKeyword = 110,
-        ProtectedKeyword = 111,
-        PublicKeyword = 112,
-        StaticKeyword = 113,
-        YieldKeyword = 114,
-        AbstractKeyword = 115,
-        AsKeyword = 116,
-        AnyKeyword = 117,
-        AsyncKeyword = 118,
-        AwaitKeyword = 119,
-        BooleanKeyword = 120,
-        ConstructorKeyword = 121,
-        DeclareKeyword = 122,
-        GetKeyword = 123,
-        IsKeyword = 124,
-        ModuleKeyword = 125,
-        NamespaceKeyword = 126,
-        NeverKeyword = 127,
-        ReadonlyKeyword = 128,
-        RequireKeyword = 129,
-        NumberKeyword = 130,
-        SetKeyword = 131,
-        StringKeyword = 132,
-        SymbolKeyword = 133,
-        TypeKeyword = 134,
-        UndefinedKeyword = 135,
-        FromKeyword = 136,
-        GlobalKeyword = 137,
-        OfKeyword = 138,
-        QualifiedName = 139,
-        ComputedPropertyName = 140,
-        TypeParameter = 141,
-        Parameter = 142,
-        Decorator = 143,
-        PropertySignature = 144,
-        PropertyDeclaration = 145,
-        MethodSignature = 146,
-        MethodDeclaration = 147,
-        Constructor = 148,
-        GetAccessor = 149,
-        SetAccessor = 150,
-        CallSignature = 151,
-        ConstructSignature = 152,
-        IndexSignature = 153,
-        TypePredicate = 154,
-        TypeReference = 155,
-        FunctionType = 156,
-        ConstructorType = 157,
-        TypeQuery = 158,
-        TypeLiteral = 159,
-        ArrayType = 160,
-        TupleType = 161,
-        UnionType = 162,
-        IntersectionType = 163,
-        ParenthesizedType = 164,
-        ThisType = 165,
-        StringLiteralType = 166,
-        ObjectBindingPattern = 167,
-        ArrayBindingPattern = 168,
-        BindingElement = 169,
-        ArrayLiteralExpression = 170,
-        ObjectLiteralExpression = 171,
-        PropertyAccessExpression = 172,
-        ElementAccessExpression = 173,
-        CallExpression = 174,
-        NewExpression = 175,
-        TaggedTemplateExpression = 176,
-        TypeAssertionExpression = 177,
-        ParenthesizedExpression = 178,
-        FunctionExpression = 179,
-        ArrowFunction = 180,
-        DeleteExpression = 181,
-        TypeOfExpression = 182,
-        VoidExpression = 183,
-        AwaitExpression = 184,
-        PrefixUnaryExpression = 185,
-        PostfixUnaryExpression = 186,
-        BinaryExpression = 187,
-        ConditionalExpression = 188,
-        TemplateExpression = 189,
-        YieldExpression = 190,
-        SpreadElementExpression = 191,
-        ClassExpression = 192,
-        OmittedExpression = 193,
-        ExpressionWithTypeArguments = 194,
-        AsExpression = 195,
-        NonNullExpression = 196,
-        TemplateSpan = 197,
-        SemicolonClassElement = 198,
-        Block = 199,
-        VariableStatement = 200,
-        EmptyStatement = 201,
-        ExpressionStatement = 202,
-        IfStatement = 203,
-        DoStatement = 204,
-        WhileStatement = 205,
-        ForStatement = 206,
-        ForInStatement = 207,
-        ForOfStatement = 208,
-        ContinueStatement = 209,
-        BreakStatement = 210,
-        ReturnStatement = 211,
-        WithStatement = 212,
-        SwitchStatement = 213,
-        LabeledStatement = 214,
-        ThrowStatement = 215,
-        TryStatement = 216,
-        DebuggerStatement = 217,
-        VariableDeclaration = 218,
-        VariableDeclarationList = 219,
-        FunctionDeclaration = 220,
-        ClassDeclaration = 221,
-        InterfaceDeclaration = 222,
-        TypeAliasDeclaration = 223,
-        EnumDeclaration = 224,
-        ModuleDeclaration = 225,
-        ModuleBlock = 226,
-        CaseBlock = 227,
-        NamespaceExportDeclaration = 228,
-        ImportEqualsDeclaration = 229,
-        ImportDeclaration = 230,
-        ImportClause = 231,
-        NamespaceImport = 232,
-        NamedImports = 233,
-        ImportSpecifier = 234,
-        ExportAssignment = 235,
-        ExportDeclaration = 236,
-        NamedExports = 237,
-        ExportSpecifier = 238,
-        MissingDeclaration = 239,
-        ExternalModuleReference = 240,
-        JsxElement = 241,
-        JsxSelfClosingElement = 242,
-        JsxOpeningElement = 243,
-        JsxText = 244,
-        JsxClosingElement = 245,
-        JsxAttribute = 246,
-        JsxSpreadAttribute = 247,
-        JsxExpression = 248,
-        CaseClause = 249,
-        DefaultClause = 250,
-        HeritageClause = 251,
-        CatchClause = 252,
-        PropertyAssignment = 253,
-        ShorthandPropertyAssignment = 254,
-        EnumMember = 255,
-        SourceFile = 256,
-        JSDocTypeExpression = 257,
-        JSDocAllType = 258,
-        JSDocUnknownType = 259,
-        JSDocArrayType = 260,
-        JSDocUnionType = 261,
-        JSDocTupleType = 262,
-        JSDocNullableType = 263,
-        JSDocNonNullableType = 264,
-        JSDocRecordType = 265,
-        JSDocRecordMember = 266,
-        JSDocTypeReference = 267,
-        JSDocOptionalType = 268,
-        JSDocFunctionType = 269,
-        JSDocVariadicType = 270,
-        JSDocConstructorType = 271,
-        JSDocThisType = 272,
-        JSDocComment = 273,
-        JSDocTag = 274,
-        JSDocParameterTag = 275,
-        JSDocReturnTag = 276,
-        JSDocTypeTag = 277,
-        JSDocTemplateTag = 278,
-        SyntaxList = 279,
-        Count = 280,
-        FirstAssignment = 56,
-        LastAssignment = 68,
-        FirstReservedWord = 70,
-        LastReservedWord = 105,
-        FirstKeyword = 70,
-        LastKeyword = 138,
-        FirstFutureReservedWord = 106,
-        LastFutureReservedWord = 114,
-        FirstTypeNode = 154,
-        LastTypeNode = 166,
-        FirstPunctuation = 15,
-        LastPunctuation = 68,
-        FirstToken = 0,
-        LastToken = 138,
-        FirstTriviaToken = 2,
-        LastTriviaToken = 7,
-        FirstLiteralToken = 8,
-        LastLiteralToken = 11,
-        FirstTemplateToken = 11,
-        LastTemplateToken = 14,
-        FirstBinaryOperator = 25,
-        LastBinaryOperator = 68,
-        FirstNode = 139,
-    }
-    const enum NodeFlags {
-        None = 0,
-        Export = 1,
-        Ambient = 2,
-        Public = 4,
-        Private = 8,
-        Protected = 16,
-        Static = 32,
-        Readonly = 64,
-        Abstract = 128,
-        Async = 256,
-        Default = 512,
-        Let = 1024,
-        Const = 2048,
-        Namespace = 4096,
-        ExportContext = 8192,
-        ContainsThis = 16384,
-        HasImplicitReturn = 32768,
-        HasExplicitReturn = 65536,
-        GlobalAugmentation = 131072,
-        HasClassExtends = 262144,
-        HasDecorators = 524288,
-        HasParamDecorators = 1048576,
-        HasAsyncFunctions = 2097152,
-        DisallowInContext = 4194304,
-        YieldContext = 8388608,
-        DecoratorContext = 16777216,
-        AwaitContext = 33554432,
-        ThisNodeHasError = 67108864,
-        JavaScriptFile = 134217728,
-        ThisNodeOrAnySubNodesHasError = 268435456,
-        HasAggregatedChildData = 536870912,
-        HasJsxSpreadAttribute = 1073741824,
-        Modifier = 1023,
-        AccessibilityModifier = 28,
-        ParameterPropertyModifier = 92,
-        BlockScoped = 3072,
-        ReachabilityCheckFlags = 98304,
-        EmitHelperFlags = 3932160,
-        ContextFlags = 197132288,
-        TypeExcludesFlags = 41943040,
-    }
-    const enum JsxFlags {
-        None = 0,
-        IntrinsicNamedElement = 1,
-        IntrinsicIndexedElement = 2,
-        IntrinsicElement = 3,
-    }
-    const enum RelationComparisonResult {
-        Succeeded = 1,
-        Failed = 2,
-        FailedAndReported = 3,
-    }
-    interface Node extends TextRange {
-        kind: SyntaxKind;
-        flags: NodeFlags;
-        decorators?: NodeArray<Decorator>;
-        modifiers?: ModifiersArray;
-        id?: number;
-        parent?: Node;
-        jsDocComment?: JSDocComment;
-        symbol?: Symbol;
-        locals?: SymbolTable;
-        nextContainer?: Node;
-        localSymbol?: Symbol;
-        flowNode?: FlowNode;
-    }
-    interface NodeArray<T> extends Array<T>, TextRange {
-        hasTrailingComma?: boolean;
-    }
-    interface ModifiersArray extends NodeArray<Modifier> {
-        flags: number;
-    }
-    interface Modifier extends Node {
-    }
-    interface Identifier extends PrimaryExpression {
-        text: string;
-        originalKeywordKind?: SyntaxKind;
-    }
-    interface QualifiedName extends Node {
-        left: EntityName;
-        right: Identifier;
-    }
-    type EntityName = Identifier | QualifiedName;
-    type PropertyName = Identifier | LiteralExpression | ComputedPropertyName;
-    type DeclarationName = Identifier | LiteralExpression | ComputedPropertyName | BindingPattern;
-    interface Declaration extends Node {
-        _declarationBrand: any;
-        name?: DeclarationName;
-    }
-    interface DeclarationStatement extends Declaration, Statement {
-        name?: Identifier;
-    }
-    interface ComputedPropertyName extends Node {
-        expression: Expression;
-    }
-    interface Decorator extends Node {
-        expression: LeftHandSideExpression;
-    }
-    interface TypeParameterDeclaration extends Declaration {
-        name: Identifier;
-        constraint?: TypeNode;
-        expression?: Expression;
-    }
-    interface SignatureDeclaration extends Declaration {
-        name?: PropertyName;
-        typeParameters?: NodeArray<TypeParameterDeclaration>;
-        parameters: NodeArray<ParameterDeclaration>;
-        type?: TypeNode;
-    }
-    interface CallSignatureDeclaration extends SignatureDeclaration, TypeElement {
-    }
-    interface ConstructSignatureDeclaration extends SignatureDeclaration, TypeElement {
-    }
-    interface VariableDeclaration extends Declaration {
-        parent?: VariableDeclarationList;
-        name: Identifier | BindingPattern;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface VariableDeclarationList extends Node {
-        declarations: NodeArray<VariableDeclaration>;
-    }
-    interface ParameterDeclaration extends Declaration {
-        dotDotDotToken?: Node;
-        name: Identifier | BindingPattern;
-        questionToken?: Node;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface BindingElement extends Declaration {
-        propertyName?: PropertyName;
-        dotDotDotToken?: Node;
-        name: Identifier | BindingPattern;
-        initializer?: Expression;
-    }
-    interface PropertySignature extends TypeElement {
-        name: PropertyName;
-        questionToken?: Node;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface PropertyDeclaration extends ClassElement {
-        questionToken?: Node;
-        name: PropertyName;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface ObjectLiteralElement extends Declaration {
-        _objectLiteralBrandBrand: any;
-        name?: PropertyName;
-    }
-    interface PropertyAssignment extends ObjectLiteralElement {
-        _propertyAssignmentBrand: any;
-        name: PropertyName;
-        questionToken?: Node;
-        initializer: Expression;
-    }
-    interface ShorthandPropertyAssignment extends ObjectLiteralElement {
-        name: Identifier;
-        questionToken?: Node;
-        equalsToken?: Node;
-        objectAssignmentInitializer?: Expression;
-    }
-    interface VariableLikeDeclaration extends Declaration {
-        propertyName?: PropertyName;
-        dotDotDotToken?: Node;
-        name: DeclarationName;
-        questionToken?: Node;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface PropertyLikeDeclaration extends Declaration {
-        name: PropertyName;
-    }
-    interface BindingPattern extends Node {
-        elements: NodeArray<BindingElement>;
-    }
-    interface ObjectBindingPattern extends BindingPattern {
-    }
-    interface ArrayBindingPattern extends BindingPattern {
-    }
-    interface FunctionLikeDeclaration extends SignatureDeclaration {
-        _functionLikeDeclarationBrand: any;
-        asteriskToken?: Node;
-        questionToken?: Node;
-        body?: Block | Expression;
-    }
-    interface FunctionDeclaration extends FunctionLikeDeclaration, DeclarationStatement {
-        name?: Identifier;
-        body?: FunctionBody;
-    }
-    interface MethodSignature extends SignatureDeclaration, TypeElement {
-        name: PropertyName;
-    }
-    interface MethodDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
-        name: PropertyName;
-        body?: FunctionBody;
-    }
-    interface ConstructorDeclaration extends FunctionLikeDeclaration, ClassElement {
-        body?: FunctionBody;
-    }
-    interface SemicolonClassElement extends ClassElement {
-        _semicolonClassElementBrand: any;
-    }
-    interface AccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
-        _accessorDeclarationBrand: any;
-        name: PropertyName;
-        body: FunctionBody;
-    }
-    interface GetAccessorDeclaration extends AccessorDeclaration {
-    }
-    interface SetAccessorDeclaration extends AccessorDeclaration {
-    }
-    interface IndexSignatureDeclaration extends SignatureDeclaration, ClassElement, TypeElement {
-        _indexSignatureDeclarationBrand: any;
-    }
-    interface TypeNode extends Node {
-        _typeNodeBrand: any;
-    }
-    interface ThisTypeNode extends TypeNode {
-        _thisTypeNodeBrand: any;
-    }
-    interface FunctionOrConstructorTypeNode extends TypeNode, SignatureDeclaration {
-        _functionOrConstructorTypeNodeBrand: any;
-    }
-    interface FunctionTypeNode extends FunctionOrConstructorTypeNode {
-    }
-    interface ConstructorTypeNode extends FunctionOrConstructorTypeNode {
-    }
-    interface TypeReferenceNode extends TypeNode {
-        typeName: EntityName;
-        typeArguments?: NodeArray<TypeNode>;
-    }
-    interface TypePredicateNode extends TypeNode {
-        parameterName: Identifier | ThisTypeNode;
-        type: TypeNode;
-    }
-    interface TypeQueryNode extends TypeNode {
-        exprName: EntityName;
-    }
-    interface TypeLiteralNode extends TypeNode, Declaration {
-        members: NodeArray<TypeElement>;
-    }
-    interface ArrayTypeNode extends TypeNode {
-        elementType: TypeNode;
-    }
-    interface TupleTypeNode extends TypeNode {
-        elementTypes: NodeArray<TypeNode>;
-    }
-    interface UnionOrIntersectionTypeNode extends TypeNode {
-        types: NodeArray<TypeNode>;
-    }
-    interface UnionTypeNode extends UnionOrIntersectionTypeNode {
-    }
-    interface IntersectionTypeNode extends UnionOrIntersectionTypeNode {
-    }
-    interface ParenthesizedTypeNode extends TypeNode {
-        type: TypeNode;
-    }
-    interface StringLiteralTypeNode extends LiteralLikeNode, TypeNode {
-        _stringLiteralTypeBrand: any;
-    }
-    interface StringLiteral extends LiteralExpression {
-        _stringLiteralBrand: any;
-    }
-    interface Expression extends Node {
-        _expressionBrand: any;
-        contextualType?: Type;
-    }
-    interface OmittedExpression extends Expression {
-    }
-    interface UnaryExpression extends Expression {
-        _unaryExpressionBrand: any;
-    }
-    interface IncrementExpression extends UnaryExpression {
-        _incrementExpressionBrand: any;
-    }
-    interface PrefixUnaryExpression extends IncrementExpression {
-        operator: SyntaxKind;
-        operand: UnaryExpression;
-    }
-    interface PostfixUnaryExpression extends IncrementExpression {
-        operand: LeftHandSideExpression;
-        operator: SyntaxKind;
-    }
-    interface PostfixExpression extends UnaryExpression {
-        _postfixExpressionBrand: any;
-    }
-    interface LeftHandSideExpression extends IncrementExpression {
-        _leftHandSideExpressionBrand: any;
-    }
-    interface MemberExpression extends LeftHandSideExpression {
-        _memberExpressionBrand: any;
-    }
-    interface PrimaryExpression extends MemberExpression {
-        _primaryExpressionBrand: any;
-    }
-    interface DeleteExpression extends UnaryExpression {
-        expression: UnaryExpression;
-    }
-    interface TypeOfExpression extends UnaryExpression {
-        expression: UnaryExpression;
-    }
-    interface VoidExpression extends UnaryExpression {
-        expression: UnaryExpression;
-    }
-    interface AwaitExpression extends UnaryExpression {
-        expression: UnaryExpression;
-    }
-    interface YieldExpression extends Expression {
-        asteriskToken?: Node;
-        expression?: Expression;
-    }
-    interface BinaryExpression extends Expression, Declaration {
-        left: Expression;
-        operatorToken: Node;
-        right: Expression;
-    }
-    interface ConditionalExpression extends Expression {
-        condition: Expression;
-        questionToken: Node;
-        whenTrue: Expression;
-        colonToken: Node;
-        whenFalse: Expression;
-    }
-    type FunctionBody = Block;
-    type ConciseBody = FunctionBody | Expression;
-    interface FunctionExpression extends PrimaryExpression, FunctionLikeDeclaration {
-        name?: Identifier;
-        body: FunctionBody;
-    }
-    interface ArrowFunction extends Expression, FunctionLikeDeclaration {
-        equalsGreaterThanToken: Node;
-        body: ConciseBody;
-    }
-    interface LiteralLikeNode extends Node {
-        text: string;
-        isUnterminated?: boolean;
-        hasExtendedUnicodeEscape?: boolean;
-        isOctalLiteral?: boolean;
-    }
-    interface LiteralExpression extends LiteralLikeNode, PrimaryExpression {
-        _literalExpressionBrand: any;
-    }
-    interface TemplateLiteralFragment extends LiteralLikeNode {
-        _templateLiteralFragmentBrand: any;
-    }
-    interface TemplateExpression extends PrimaryExpression {
-        head: TemplateLiteralFragment;
-        templateSpans: NodeArray<TemplateSpan>;
-    }
-    interface TemplateSpan extends Node {
-        expression: Expression;
-        literal: TemplateLiteralFragment;
-    }
-    interface ParenthesizedExpression extends PrimaryExpression {
-        expression: Expression;
-    }
-    interface ArrayLiteralExpression extends PrimaryExpression {
-        elements: NodeArray<Expression>;
-        multiLine?: boolean;
-    }
-    interface SpreadElementExpression extends Expression {
-        expression: Expression;
-    }
-    interface ObjectLiteralExpression extends PrimaryExpression, Declaration {
-        properties: NodeArray<ObjectLiteralElement>;
-        multiLine?: boolean;
-    }
-    interface PropertyAccessExpression extends MemberExpression, Declaration {
-        expression: LeftHandSideExpression;
-        dotToken: Node;
-        name: Identifier;
-    }
-    type IdentifierOrPropertyAccess = Identifier | PropertyAccessExpression;
-    interface ElementAccessExpression extends MemberExpression {
-        expression: LeftHandSideExpression;
-        argumentExpression?: Expression;
-    }
-    interface CallExpression extends LeftHandSideExpression, Declaration {
-        expression: LeftHandSideExpression;
-        typeArguments?: NodeArray<TypeNode>;
-        arguments: NodeArray<Expression>;
-    }
-    interface ExpressionWithTypeArguments extends TypeNode {
-        expression: LeftHandSideExpression;
-        typeArguments?: NodeArray<TypeNode>;
-    }
-    interface NewExpression extends CallExpression, PrimaryExpression {
-    }
-    interface TaggedTemplateExpression extends MemberExpression {
-        tag: LeftHandSideExpression;
-        template: LiteralExpression | TemplateExpression;
-    }
-    type CallLikeExpression = CallExpression | NewExpression | TaggedTemplateExpression | Decorator;
-    interface AsExpression extends Expression {
-        expression: Expression;
-        type: TypeNode;
-    }
-    interface TypeAssertion extends UnaryExpression {
-        type: TypeNode;
-        expression: UnaryExpression;
-    }
-    type AssertionExpression = TypeAssertion | AsExpression;
-    interface NonNullExpression extends LeftHandSideExpression {
-        expression: Expression;
-    }
-    interface JsxElement extends PrimaryExpression {
-        openingElement: JsxOpeningElement;
-        children: NodeArray<JsxChild>;
-        closingElement: JsxClosingElement;
-    }
-    interface JsxOpeningElement extends Expression {
-        _openingElementBrand?: any;
-        tagName: EntityName;
-        attributes: NodeArray<JsxAttribute | JsxSpreadAttribute>;
-    }
-    interface JsxSelfClosingElement extends PrimaryExpression, JsxOpeningElement {
-        _selfClosingElementBrand?: any;
-    }
-    type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
-    interface JsxAttribute extends Node {
-        name: Identifier;
-        initializer?: Expression;
-    }
-    interface JsxSpreadAttribute extends Node {
-        expression: Expression;
-    }
-    interface JsxClosingElement extends Node {
-        tagName: EntityName;
-    }
-    interface JsxExpression extends Expression {
-        expression?: Expression;
-    }
-    interface JsxText extends Node {
-        _jsxTextExpressionBrand: any;
-    }
-    type JsxChild = JsxText | JsxExpression | JsxElement | JsxSelfClosingElement;
-    interface Statement extends Node {
-        _statementBrand: any;
-    }
-    interface EmptyStatement extends Statement {
-    }
-    interface DebuggerStatement extends Statement {
-    }
-    interface MissingDeclaration extends DeclarationStatement, ClassElement, ObjectLiteralElement, TypeElement {
-        name?: Identifier;
-    }
-    type BlockLike = SourceFile | Block | ModuleBlock | CaseClause;
-    interface Block extends Statement {
-        statements: NodeArray<Statement>;
-    }
-    interface VariableStatement extends Statement {
-        declarationList: VariableDeclarationList;
-    }
-    interface ExpressionStatement extends Statement {
-        expression: Expression;
-    }
-    interface IfStatement extends Statement {
-        expression: Expression;
-        thenStatement: Statement;
-        elseStatement?: Statement;
-    }
-    interface IterationStatement extends Statement {
-        statement: Statement;
-    }
-    interface DoStatement extends IterationStatement {
-        expression: Expression;
-    }
-    interface WhileStatement extends IterationStatement {
-        expression: Expression;
-    }
-    interface ForStatement extends IterationStatement {
-        initializer?: VariableDeclarationList | Expression;
-        condition?: Expression;
-        incrementor?: Expression;
-    }
-    interface ForInStatement extends IterationStatement {
-        initializer: VariableDeclarationList | Expression;
-        expression: Expression;
-    }
-    interface ForOfStatement extends IterationStatement {
-        initializer: VariableDeclarationList | Expression;
-        expression: Expression;
-    }
-    interface BreakStatement extends Statement {
-        label?: Identifier;
-    }
-    interface ContinueStatement extends Statement {
-        label?: Identifier;
-    }
-    type BreakOrContinueStatement = BreakStatement | ContinueStatement;
-    interface ReturnStatement extends Statement {
-        expression?: Expression;
-    }
-    interface WithStatement extends Statement {
-        expression: Expression;
-        statement: Statement;
-    }
-    interface SwitchStatement extends Statement {
-        expression: Expression;
-        caseBlock: CaseBlock;
-    }
-    interface CaseBlock extends Node {
-        clauses: NodeArray<CaseOrDefaultClause>;
-    }
-    interface CaseClause extends Node {
-        expression: Expression;
-        statements: NodeArray<Statement>;
-    }
-    interface DefaultClause extends Node {
-        statements: NodeArray<Statement>;
-    }
-    type CaseOrDefaultClause = CaseClause | DefaultClause;
-    interface LabeledStatement extends Statement {
-        label: Identifier;
-        statement: Statement;
-    }
-    interface ThrowStatement extends Statement {
-        expression: Expression;
-    }
-    interface TryStatement extends Statement {
-        tryBlock: Block;
-        catchClause?: CatchClause;
-        finallyBlock?: Block;
-    }
-    interface CatchClause extends Node {
-        variableDeclaration: VariableDeclaration;
-        block: Block;
-    }
-    type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration;
-    interface ClassLikeDeclaration extends Declaration {
-        name?: Identifier;
-        typeParameters?: NodeArray<TypeParameterDeclaration>;
-        heritageClauses?: NodeArray<HeritageClause>;
-        members: NodeArray<ClassElement>;
-    }
-    interface ClassDeclaration extends ClassLikeDeclaration, DeclarationStatement {
-        name?: Identifier;
-    }
-    interface ClassExpression extends ClassLikeDeclaration, PrimaryExpression {
-    }
-    interface ClassElement extends Declaration {
-        _classElementBrand: any;
-        name?: PropertyName;
-    }
-    interface TypeElement extends Declaration {
-        _typeElementBrand: any;
-        name?: PropertyName;
-        questionToken?: Node;
-    }
-    interface InterfaceDeclaration extends DeclarationStatement {
-        name: Identifier;
-        typeParameters?: NodeArray<TypeParameterDeclaration>;
-        heritageClauses?: NodeArray<HeritageClause>;
-        members: NodeArray<TypeElement>;
-    }
-    interface HeritageClause extends Node {
-        token: SyntaxKind;
-        types?: NodeArray<ExpressionWithTypeArguments>;
-    }
-    interface TypeAliasDeclaration extends DeclarationStatement {
-        name: Identifier;
-        typeParameters?: NodeArray<TypeParameterDeclaration>;
-        type: TypeNode;
-    }
-    interface EnumMember extends Declaration {
-        name: DeclarationName;
-        initializer?: Expression;
-    }
-    interface EnumDeclaration extends DeclarationStatement {
-        name: Identifier;
-        members: NodeArray<EnumMember>;
-    }
-    type ModuleBody = ModuleBlock | ModuleDeclaration;
-    interface ModuleDeclaration extends DeclarationStatement {
-        name: Identifier | LiteralExpression;
-        body: ModuleBlock | ModuleDeclaration;
-    }
-    interface ModuleBlock extends Node, Statement {
-        statements: NodeArray<Statement>;
-    }
-    interface ImportEqualsDeclaration extends DeclarationStatement {
-        name: Identifier;
-        moduleReference: EntityName | ExternalModuleReference;
-    }
-    interface ExternalModuleReference extends Node {
-        expression?: Expression;
-    }
-    interface ImportDeclaration extends Statement {
-        importClause?: ImportClause;
-        moduleSpecifier: Expression;
-    }
-    interface ImportClause extends Declaration {
-        name?: Identifier;
-        namedBindings?: NamespaceImport | NamedImports;
-    }
-    interface NamespaceImport extends Declaration {
-        name: Identifier;
-    }
-    interface NamespaceExportDeclaration extends DeclarationStatement {
-        name: Identifier;
-        moduleReference: LiteralLikeNode;
-    }
-    interface ExportDeclaration extends DeclarationStatement {
-        exportClause?: NamedExports;
-        moduleSpecifier?: Expression;
-    }
-    interface NamedImports extends Node {
-        elements: NodeArray<ImportSpecifier>;
-    }
-    interface NamedExports extends Node {
-        elements: NodeArray<ExportSpecifier>;
-    }
-    type NamedImportsOrExports = NamedImports | NamedExports;
-    interface ImportSpecifier extends Declaration {
-        propertyName?: Identifier;
-        name: Identifier;
-    }
-    interface ExportSpecifier extends Declaration {
-        propertyName?: Identifier;
-        name: Identifier;
-    }
-    type ImportOrExportSpecifier = ImportSpecifier | ExportSpecifier;
-    interface ExportAssignment extends DeclarationStatement {
-        isExportEquals?: boolean;
-        expression: Expression;
-    }
-    interface FileReference extends TextRange {
-        fileName: string;
-    }
-    interface CommentRange extends TextRange {
-        hasTrailingNewLine?: boolean;
-        kind: SyntaxKind;
-    }
-    interface JSDocTypeExpression extends Node {
-        type: JSDocType;
-    }
-    interface JSDocType extends TypeNode {
-        _jsDocTypeBrand: any;
-    }
-    interface JSDocAllType extends JSDocType {
-        _JSDocAllTypeBrand: any;
-    }
-    interface JSDocUnknownType extends JSDocType {
-        _JSDocUnknownTypeBrand: any;
-    }
-    interface JSDocArrayType extends JSDocType {
-        elementType: JSDocType;
-    }
-    interface JSDocUnionType extends JSDocType {
-        types: NodeArray<JSDocType>;
-    }
-    interface JSDocTupleType extends JSDocType {
-        types: NodeArray<JSDocType>;
-    }
-    interface JSDocNonNullableType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocNullableType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocRecordType extends JSDocType, TypeLiteralNode {
-        members: NodeArray<JSDocRecordMember>;
-    }
-    interface JSDocTypeReference extends JSDocType {
-        name: EntityName;
-        typeArguments: NodeArray<JSDocType>;
-    }
-    interface JSDocOptionalType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocFunctionType extends JSDocType, SignatureDeclaration {
-        parameters: NodeArray<ParameterDeclaration>;
-        type: JSDocType;
-    }
-    interface JSDocVariadicType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocConstructorType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocThisType extends JSDocType {
-        type: JSDocType;
-    }
-    type JSDocTypeReferencingNode = JSDocThisType | JSDocConstructorType | JSDocVariadicType | JSDocOptionalType | JSDocNullableType | JSDocNonNullableType;
-    interface JSDocRecordMember extends PropertySignature {
-        name: Identifier | LiteralExpression;
-        type?: JSDocType;
-    }
-    interface JSDocComment extends Node {
-        tags: NodeArray<JSDocTag>;
-    }
-    interface JSDocTag extends Node {
-        atToken: Node;
-        tagName: Identifier;
-    }
-    interface JSDocTemplateTag extends JSDocTag {
-        typeParameters: NodeArray<TypeParameterDeclaration>;
-    }
-    interface JSDocReturnTag extends JSDocTag {
-        typeExpression: JSDocTypeExpression;
-    }
-    interface JSDocTypeTag extends JSDocTag {
-        typeExpression: JSDocTypeExpression;
-    }
-    interface JSDocParameterTag extends JSDocTag {
-        preParameterName?: Identifier;
-        typeExpression?: JSDocTypeExpression;
-        postParameterName?: Identifier;
-        isBracketed: boolean;
-    }
-    const enum FlowFlags {
-        Unreachable = 1,
-        Start = 2,
-        BranchLabel = 4,
-        LoopLabel = 8,
-        Assignment = 16,
-        TrueCondition = 32,
-        FalseCondition = 64,
-        Referenced = 128,
-        Shared = 256,
-        Label = 12,
-        Condition = 96,
-    }
-    interface FlowNode {
-        flags: FlowFlags;
-        id?: number;
-    }
-    interface FlowLabel extends FlowNode {
-        antecedents: FlowNode[];
-    }
-    interface FlowAssignment extends FlowNode {
-        node: Expression | VariableDeclaration | BindingElement;
-        antecedent: FlowNode;
-    }
-    interface FlowCondition extends FlowNode {
-        expression: Expression;
-        antecedent: FlowNode;
-    }
-    interface AmdDependency {
-        path: string;
-        name: string;
-    }
-    interface SourceFile extends Declaration {
-        statements: NodeArray<Statement>;
-        endOfFileToken: Node;
-        fileName: string;
-        path: Path;
-        text: string;
-        amdDependencies: AmdDependency[];
-        moduleName: string;
-        referencedFiles: FileReference[];
-        typeReferenceDirectives: FileReference[];
-        languageVariant: LanguageVariant;
-        isDeclarationFile: boolean;
-        renamedDependencies?: Map<string>;
-        hasNoDefaultLib: boolean;
-        languageVersion: ScriptTarget;
-        scriptKind: ScriptKind;
-        externalModuleIndicator: Node;
-        commonJsModuleIndicator: Node;
-        identifiers: Map<string>;
-        nodeCount: number;
-        identifierCount: number;
-        symbolCount: number;
-        parseDiagnostics: Diagnostic[];
-        bindDiagnostics: Diagnostic[];
-        lineMap: number[];
-        classifiableNames?: Map<string>;
-        resolvedModules: Map<ResolvedModule>;
-        resolvedTypeReferenceDirectiveNames: Map<ResolvedTypeReferenceDirective>;
-        imports: LiteralExpression[];
-        moduleAugmentations: LiteralExpression[];
-    }
-    interface ScriptReferenceHost {
-        getCompilerOptions(): CompilerOptions;
-        getSourceFile(fileName: string): SourceFile;
-        getSourceFileByPath(path: Path): SourceFile;
-        getCurrentDirectory(): string;
-    }
-    interface ParseConfigHost {
-        readDirectory(rootDir: string, extension: string, exclude: string[]): string[];
-    }
-    interface WriteFileCallback {
-        (fileName: string, data: string, writeByteOrderMark: boolean, onError?: (message: string) => void, sourceFiles?: SourceFile[]): void;
-    }
-    class OperationCanceledException {
-    }
-    interface CancellationToken {
-        isCancellationRequested(): boolean;
-        throwIfCancellationRequested(): void;
-    }
-    interface Program extends ScriptReferenceHost {
-        getRootFileNames(): string[];
-        getSourceFiles(): SourceFile[];
-        emit(targetSourceFile?: SourceFile, writeFile?: WriteFileCallback, cancellationToken?: CancellationToken): EmitResult;
-        getOptionsDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
-        getGlobalDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
-        getSyntacticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-        getSemanticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-        getDeclarationDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-        getTypeChecker(): TypeChecker;
-        getCommonSourceDirectory(): string;
-        getDiagnosticsProducingTypeChecker(): TypeChecker;
-        getClassifiableNames(): Map<string>;
-        getNodeCount(): number;
-        getIdentifierCount(): number;
-        getSymbolCount(): number;
-        getTypeCount(): number;
-        getFileProcessingDiagnostics(): DiagnosticCollection;
-        getResolvedTypeReferenceDirectives(): Map<ResolvedTypeReferenceDirective>;
-        structureIsReused?: boolean;
-    }
-    interface SourceMapSpan {
-        emittedLine: number;
-        emittedColumn: number;
-        sourceLine: number;
-        sourceColumn: number;
-        nameIndex?: number;
-        sourceIndex: number;
-    }
-    interface SourceMapData {
-        sourceMapFilePath: string;
-        jsSourceMappingURL: string;
-        sourceMapFile: string;
-        sourceMapSourceRoot: string;
-        sourceMapSources: string[];
-        sourceMapSourcesContent?: string[];
-        inputSourceFileNames: string[];
-        sourceMapNames?: string[];
-        sourceMapMappings: string;
-        sourceMapDecodedMappings: SourceMapSpan[];
-    }
-    enum ExitStatus {
-        Success = 0,
-        DiagnosticsPresent_OutputsSkipped = 1,
-        DiagnosticsPresent_OutputsGenerated = 2,
-    }
-    interface EmitResult {
-        emitSkipped: boolean;
-        diagnostics: Diagnostic[];
-        emittedFiles: string[];
-        sourceMaps: SourceMapData[];
-    }
-    interface TypeCheckerHost {
-        getCompilerOptions(): CompilerOptions;
-        getSourceFiles(): SourceFile[];
-        getSourceFile(fileName: string): SourceFile;
-        getResolvedTypeReferenceDirectives(): Map<ResolvedTypeReferenceDirective>;
-    }
-    interface TypeChecker {
-        getTypeOfSymbolAtLocation(symbol: Symbol, node: Node): Type;
-        getDeclaredTypeOfSymbol(symbol: Symbol): Type;
-        getPropertiesOfType(type: Type): Symbol[];
-        getPropertyOfType(type: Type, propertyName: string): Symbol;
-        getSignaturesOfType(type: Type, kind: SignatureKind): Signature[];
-        getIndexTypeOfType(type: Type, kind: IndexKind): Type;
-        getBaseTypes(type: InterfaceType): ObjectType[];
-        getReturnTypeOfSignature(signature: Signature): Type;
-        getNonNullableType(type: Type): Type;
-        getSymbolsInScope(location: Node, meaning: SymbolFlags): Symbol[];
-        getSymbolAtLocation(node: Node): Symbol;
-        getSymbolsOfParameterPropertyDeclaration(parameter: ParameterDeclaration, parameterName: string): Symbol[];
-        getShorthandAssignmentValueSymbol(location: Node): Symbol;
-        getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol;
-        getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol;
-        getTypeAtLocation(node: Node): Type;
-        typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
-        symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): string;
-        getSymbolDisplayBuilder(): SymbolDisplayBuilder;
-        getFullyQualifiedName(symbol: Symbol): string;
-        getAugmentedPropertiesOfType(type: Type): Symbol[];
-        getRootSymbols(symbol: Symbol): Symbol[];
-        getContextualType(node: Expression): Type;
-        getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature;
-        getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature;
-        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
-        isUndefinedSymbol(symbol: Symbol): boolean;
-        isArgumentsSymbol(symbol: Symbol): boolean;
-        isUnknownSymbol(symbol: Symbol): boolean;
-        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
-        isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName, propertyName: string): boolean;
-        getAliasedSymbol(symbol: Symbol): Symbol;
-        getExportsOfModule(moduleSymbol: Symbol): Symbol[];
-        getJsxElementAttributesType(elementNode: JsxOpeningLikeElement): Type;
-        getJsxIntrinsicTagNames(): Symbol[];
-        isOptionalParameter(node: ParameterDeclaration): boolean;
-        getDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-        getGlobalDiagnostics(): Diagnostic[];
-        getEmitResolver(sourceFile?: SourceFile, cancellationToken?: CancellationToken): EmitResolver;
-        getNodeCount(): number;
-        getIdentifierCount(): number;
-        getSymbolCount(): number;
-        getTypeCount(): number;
-    }
-    interface SymbolDisplayBuilder {
-        buildTypeDisplay(type: Type, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildSymbolDisplay(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): void;
-        buildSignatureDisplay(signatures: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
-        buildParameterDisplay(parameter: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildTypeParameterDisplay(tp: TypeParameter, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildTypePredicateDisplay(predicate: TypePredicate, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildTypeParameterDisplayFromSymbol(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildDisplayForParametersAndDelimiters(thisType: Type, parameters: Symbol[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildDisplayForTypeParametersAndDelimiters(typeParameters: TypeParameter[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildReturnTypeDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-    }
-    interface SymbolWriter {
-        writeKeyword(text: string): void;
-        writeOperator(text: string): void;
-        writePunctuation(text: string): void;
-        writeSpace(text: string): void;
-        writeStringLiteral(text: string): void;
-        writeParameter(text: string): void;
-        writeSymbol(text: string, symbol: Symbol): void;
-        writeLine(): void;
-        increaseIndent(): void;
-        decreaseIndent(): void;
-        clear(): void;
-        trackSymbol(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): void;
-        reportInaccessibleThisError(): void;
-    }
-    const enum TypeFormatFlags {
-        None = 0,
-        WriteArrayAsGenericType = 1,
-        UseTypeOfFunction = 2,
-        NoTruncation = 4,
-        WriteArrowStyleSignature = 8,
-        WriteOwnNameForAnyLike = 16,
-        WriteTypeArgumentsOfSignature = 32,
-        InElementType = 64,
-        UseFullyQualifiedType = 128,
-        InFirstTypeArgument = 256,
-    }
-    const enum SymbolFormatFlags {
-        None = 0,
-        WriteTypeParametersOrArguments = 1,
-        UseOnlyExternalAliasing = 2,
-    }
-    const enum SymbolAccessibility {
-        Accessible = 0,
-        NotAccessible = 1,
-        CannotBeNamed = 2,
-    }
-    const enum TypePredicateKind {
-        This = 0,
-        Identifier = 1,
-    }
-    interface TypePredicateBase {
-        kind: TypePredicateKind;
-        type: Type;
-    }
-    interface ThisTypePredicate extends TypePredicateBase {
-        _thisTypePredicateBrand: any;
-    }
-    interface IdentifierTypePredicate extends TypePredicateBase {
-        parameterName: string;
-        parameterIndex: number;
-    }
-    type TypePredicate = IdentifierTypePredicate | ThisTypePredicate;
-    type AnyImportSyntax = ImportDeclaration | ImportEqualsDeclaration;
-    interface SymbolVisibilityResult {
-        accessibility: SymbolAccessibility;
-        aliasesToMakeVisible?: AnyImportSyntax[];
-        errorSymbolName?: string;
-        errorNode?: Node;
-    }
-    interface SymbolAccessibilityResult extends SymbolVisibilityResult {
-        errorModuleName?: string;
-    }
-    enum TypeReferenceSerializationKind {
-        Unknown = 0,
-        TypeWithConstructSignatureAndValue = 1,
-        VoidType = 2,
-        NumberLikeType = 3,
-        StringLikeType = 4,
-        BooleanType = 5,
-        ArrayLikeType = 6,
-        ESSymbolType = 7,
-        TypeWithCallSignature = 8,
-        ObjectType = 9,
-    }
-    interface EmitResolver {
-        hasGlobalName(name: string): boolean;
-        getReferencedExportContainer(node: Identifier): SourceFile | ModuleDeclaration | EnumDeclaration;
-        getReferencedImportDeclaration(node: Identifier): Declaration;
-        getReferencedDeclarationWithCollidingName(node: Identifier): Declaration;
-        isDeclarationWithCollidingName(node: Declaration): boolean;
-        isValueAliasDeclaration(node: Node): boolean;
-        isReferencedAliasDeclaration(node: Node, checkChildren?: boolean): boolean;
-        isTopLevelValueImportEqualsWithEntityName(node: ImportEqualsDeclaration): boolean;
-        getNodeCheckFlags(node: Node): NodeCheckFlags;
-        isDeclarationVisible(node: Declaration): boolean;
-        collectLinkedAliases(node: Identifier): Node[];
-        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
-        writeTypeOfDeclaration(declaration: AccessorDeclaration | VariableLikeDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
-        writeReturnTypeOfSignatureDeclaration(signatureDeclaration: SignatureDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
-        writeTypeOfExpression(expr: Expression, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
-        writeBaseConstructorTypeOfClass(node: ClassLikeDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
-        isSymbolAccessible(symbol: Symbol, enclosingDeclaration: Node, meaning: SymbolFlags): SymbolAccessibilityResult;
-        isEntityNameVisible(entityName: EntityName | Expression, enclosingDeclaration: Node): SymbolVisibilityResult;
-        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
-        getReferencedValueDeclaration(reference: Identifier): Declaration;
-        getTypeReferenceSerializationKind(typeName: EntityName): TypeReferenceSerializationKind;
-        isOptionalParameter(node: ParameterDeclaration): boolean;
-        moduleExportsSomeValue(moduleReferenceExpression: Expression): boolean;
-        isArgumentsLocalBinding(node: Identifier): boolean;
-        getExternalModuleFileFromDeclaration(declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration): SourceFile;
-        getTypeReferenceDirectivesForEntityName(name: EntityName | PropertyAccessExpression): string[];
-        getTypeReferenceDirectivesForSymbol(symbol: Symbol, meaning?: SymbolFlags): string[];
-    }
-    const enum SymbolFlags {
-        None = 0,
-        FunctionScopedVariable = 1,
-        BlockScopedVariable = 2,
-        Property = 4,
-        EnumMember = 8,
-        Function = 16,
-        Class = 32,
-        Interface = 64,
-        ConstEnum = 128,
-        RegularEnum = 256,
-        ValueModule = 512,
-        NamespaceModule = 1024,
-        TypeLiteral = 2048,
-        ObjectLiteral = 4096,
-        Method = 8192,
-        Constructor = 16384,
-        GetAccessor = 32768,
-        SetAccessor = 65536,
-        Signature = 131072,
-        TypeParameter = 262144,
-        TypeAlias = 524288,
-        ExportValue = 1048576,
-        ExportType = 2097152,
-        ExportNamespace = 4194304,
-        Alias = 8388608,
-        Instantiated = 16777216,
-        Merged = 33554432,
-        Transient = 67108864,
-        Prototype = 134217728,
-        SyntheticProperty = 268435456,
-        Optional = 536870912,
-        ExportStar = 1073741824,
-        Enum = 384,
-        Variable = 3,
-        Value = 107455,
-        Type = 793056,
-        Namespace = 1536,
-        Module = 1536,
-        Accessor = 98304,
-        FunctionScopedVariableExcludes = 107454,
-        BlockScopedVariableExcludes = 107455,
-        ParameterExcludes = 107455,
-        PropertyExcludes = 0,
-        EnumMemberExcludes = 107455,
-        FunctionExcludes = 106927,
-        ClassExcludes = 899519,
-        InterfaceExcludes = 792960,
-        RegularEnumExcludes = 899327,
-        ConstEnumExcludes = 899967,
-        ValueModuleExcludes = 106639,
-        NamespaceModuleExcludes = 0,
-        MethodExcludes = 99263,
-        GetAccessorExcludes = 41919,
-        SetAccessorExcludes = 74687,
-        TypeParameterExcludes = 530912,
-        TypeAliasExcludes = 793056,
-        AliasExcludes = 8388608,
-        ModuleMember = 8914931,
-        ExportHasLocal = 944,
-        HasExports = 1952,
-        HasMembers = 6240,
-        BlockScoped = 418,
-        PropertyOrAccessor = 98308,
-        Export = 7340032,
-        Classifiable = 788448,
-    }
-    interface Symbol {
-        flags: SymbolFlags;
-        name: string;
-        declarations?: Declaration[];
-        valueDeclaration?: Declaration;
-        members?: SymbolTable;
-        exports?: SymbolTable;
-        globalExports?: SymbolTable;
-        id?: number;
-        mergeId?: number;
-        parent?: Symbol;
-        exportSymbol?: Symbol;
-        constEnumOnlyModule?: boolean;
-    }
-    interface SymbolLinks {
-        target?: Symbol;
-        type?: Type;
-        declaredType?: Type;
-        typeParameters?: TypeParameter[];
-        inferredClassType?: Type;
-        instantiations?: Map<Type>;
-        mapper?: TypeMapper;
-        referenced?: boolean;
-        containingType?: UnionOrIntersectionType;
-        resolvedExports?: SymbolTable;
-        exportsChecked?: boolean;
-        isDeclarationWithCollidingName?: boolean;
-        bindingElement?: BindingElement;
-        exportsSomeValue?: boolean;
-    }
-    interface TransientSymbol extends Symbol, SymbolLinks {
-    }
-    interface SymbolTable {
-        [index: string]: Symbol;
-    }
-    const enum NodeCheckFlags {
-        TypeChecked = 1,
-        LexicalThis = 2,
-        CaptureThis = 4,
-        SuperInstance = 256,
-        SuperStatic = 512,
-        ContextChecked = 1024,
-        AsyncMethodWithSuper = 2048,
-        AsyncMethodWithSuperBinding = 4096,
-        CaptureArguments = 8192,
-        EnumValuesComputed = 16384,
-        LexicalModuleMergesWithClass = 32768,
-        LoopWithCapturedBlockScopedBinding = 65536,
-        CapturedBlockScopedBinding = 131072,
-        BlockScopedBindingInLoop = 262144,
-        ClassWithBodyScopedClassBinding = 524288,
-        BodyScopedClassBinding = 1048576,
-        NeedsLoopOutParameter = 2097152,
-    }
-    interface NodeLinks {
-        resolvedType?: Type;
-        resolvedSignature?: Signature;
-        resolvedSymbol?: Symbol;
-        resolvedIndexInfo?: IndexInfo;
-        flags?: NodeCheckFlags;
-        enumMemberValue?: number;
-        isVisible?: boolean;
-        hasReportedStatementInAmbientContext?: boolean;
-        jsxFlags?: JsxFlags;
-        resolvedJsxType?: Type;
-        hasSuperCall?: boolean;
-        superCall?: ExpressionStatement;
-    }
-    const enum TypeFlags {
-        Any = 1,
-        String = 2,
-        Number = 4,
-        Boolean = 8,
-        Void = 16,
-        Undefined = 32,
-        Null = 64,
-        Enum = 128,
-        StringLiteral = 256,
-        TypeParameter = 512,
-        Class = 1024,
-        Interface = 2048,
-        Reference = 4096,
-        Tuple = 8192,
-        Union = 16384,
-        Intersection = 32768,
-        Anonymous = 65536,
-        Instantiated = 131072,
-        FromSignature = 262144,
-        ObjectLiteral = 524288,
-        FreshObjectLiteral = 1048576,
-        ContainsUndefinedOrNull = 2097152,
-        ContainsObjectLiteral = 4194304,
-        ContainsAnyFunctionType = 8388608,
-        ESSymbol = 16777216,
-        ThisType = 33554432,
-        ObjectLiteralPatternWithComputedProperties = 67108864,
-        Never = 134217728,
-        Nullable = 96,
-        Intrinsic = 150995071,
-        Primitive = 16777726,
-        StringLike = 258,
-        NumberLike = 132,
-        ObjectType = 80896,
-        UnionOrIntersection = 49152,
-        StructuredType = 130048,
-        Narrowable = 97793,
-        RequiresWidening = 6291456,
-        PropagatingFlags = 14680064,
-    }
-    type DestructuringPattern = BindingPattern | ObjectLiteralExpression | ArrayLiteralExpression;
-    interface Type {
-        flags: TypeFlags;
-        id: number;
-        symbol?: Symbol;
-        pattern?: DestructuringPattern;
-    }
-    interface IntrinsicType extends Type {
-        intrinsicName: string;
-    }
-    interface StringLiteralType extends Type {
-        text: string;
-    }
-    interface ObjectType extends Type {
-    }
-    interface InterfaceType extends ObjectType {
-        typeParameters: TypeParameter[];
-        outerTypeParameters: TypeParameter[];
-        localTypeParameters: TypeParameter[];
-        thisType: TypeParameter;
-        resolvedBaseConstructorType?: Type;
-        resolvedBaseTypes: ObjectType[];
-    }
-    interface InterfaceTypeWithDeclaredMembers extends InterfaceType {
-        declaredProperties: Symbol[];
-        declaredCallSignatures: Signature[];
-        declaredConstructSignatures: Signature[];
-        declaredStringIndexInfo: IndexInfo;
-        declaredNumberIndexInfo: IndexInfo;
-    }
-    interface TypeReference extends ObjectType {
-        target: GenericType;
-        typeArguments: Type[];
-    }
-    interface GenericType extends InterfaceType, TypeReference {
-        instantiations: Map<TypeReference>;
-    }
-    interface TupleType extends ObjectType {
-        elementTypes: Type[];
-    }
-    interface UnionOrIntersectionType extends Type {
-        types: Type[];
-        reducedType: Type;
-        resolvedProperties: SymbolTable;
-    }
-    interface UnionType extends UnionOrIntersectionType {
-    }
-    interface IntersectionType extends UnionOrIntersectionType {
-    }
-    interface AnonymousType extends ObjectType {
-        target?: AnonymousType;
-        mapper?: TypeMapper;
-    }
-    interface ResolvedType extends ObjectType, UnionOrIntersectionType {
-        members: SymbolTable;
-        properties: Symbol[];
-        callSignatures: Signature[];
-        constructSignatures: Signature[];
-        stringIndexInfo?: IndexInfo;
-        numberIndexInfo?: IndexInfo;
-    }
-    interface FreshObjectLiteralType extends ResolvedType {
-        regularType: ResolvedType;
-    }
-    interface IterableOrIteratorType extends ObjectType, UnionType {
-        iterableElementType?: Type;
-        iteratorElementType?: Type;
-    }
-    interface TypeParameter extends Type {
-        constraint: Type;
-        target?: TypeParameter;
-        mapper?: TypeMapper;
-        resolvedApparentType: Type;
-    }
-    const enum SignatureKind {
-        Call = 0,
-        Construct = 1,
-    }
-    interface Signature {
-        declaration: SignatureDeclaration;
-        typeParameters: TypeParameter[];
-        parameters: Symbol[];
-        thisType?: Type;
-        resolvedReturnType: Type;
-        minArgumentCount: number;
-        hasRestParameter: boolean;
-        hasStringLiterals: boolean;
-        target?: Signature;
-        mapper?: TypeMapper;
-        unionSignatures?: Signature[];
-        erasedSignatureCache?: Signature;
-        isolatedSignatureType?: ObjectType;
-        typePredicate?: TypePredicate;
-    }
-    const enum IndexKind {
-        String = 0,
-        Number = 1,
-    }
-    interface IndexInfo {
-        type: Type;
-        isReadonly: boolean;
-        declaration?: SignatureDeclaration;
-    }
-    interface TypeMapper {
-        (t: TypeParameter): Type;
-        mappedTypes?: Type[];
-        instantiations?: Type[];
-        context?: InferenceContext;
-    }
-    interface TypeInferences {
-        primary: Type[];
-        secondary: Type[];
-        isFixed: boolean;
-    }
-    interface InferenceContext {
-        typeParameters: TypeParameter[];
-        inferUnionTypes: boolean;
-        inferences: TypeInferences[];
-        inferredTypes: Type[];
-        mapper?: TypeMapper;
-        failedTypeParameterIndex?: number;
-    }
-    const enum SpecialPropertyAssignmentKind {
-        None = 0,
-        ExportsProperty = 1,
-        ModuleExports = 2,
-        PrototypeProperty = 3,
-        ThisProperty = 4,
-    }
-    interface DiagnosticMessage {
-        key: string;
-        category: DiagnosticCategory;
-        code: number;
-        message: string;
-    }
-    interface DiagnosticMessageChain {
-        messageText: string;
-        category: DiagnosticCategory;
-        code: number;
-        next?: DiagnosticMessageChain;
-    }
-    interface Diagnostic {
-        file: SourceFile;
-        start: number;
-        length: number;
-        messageText: string | DiagnosticMessageChain;
-        category: DiagnosticCategory;
-        code: number;
-    }
-    enum DiagnosticCategory {
-        Warning = 0,
-        Error = 1,
-        Message = 2,
-    }
-    enum ModuleResolutionKind {
-        Classic = 1,
-        NodeJs = 2,
-    }
-    type RootPaths = string[];
-    type PathSubstitutions = Map<string[]>;
-    type TsConfigOnlyOptions = RootPaths | PathSubstitutions;
-    type CompilerOptionsValue = string | number | boolean | (string | number)[] | TsConfigOnlyOptions;
-    interface CompilerOptions {
-        allowNonTsExtensions?: boolean;
-        charset?: string;
-        declaration?: boolean;
-        declarationDir?: string;
-        diagnostics?: boolean;
-        emitBOM?: boolean;
-        help?: boolean;
-        init?: boolean;
-        inlineSourceMap?: boolean;
-        inlineSources?: boolean;
-        jsx?: JsxEmit;
-        reactNamespace?: string;
-        listFiles?: boolean;
-        typesSearchPaths?: string[];
-        locale?: string;
-        mapRoot?: string;
-        module?: ModuleKind;
-        newLine?: NewLineKind;
-        noEmit?: boolean;
-        noEmitHelpers?: boolean;
-        noEmitOnError?: boolean;
-        noErrorTruncation?: boolean;
-        noImplicitAny?: boolean;
-        noImplicitThis?: boolean;
-        noLib?: boolean;
-        noResolve?: boolean;
-        out?: string;
-        outFile?: string;
-        outDir?: string;
-        preserveConstEnums?: boolean;
-        pretty?: DiagnosticStyle;
-        project?: string;
-        removeComments?: boolean;
-        rootDir?: string;
-        sourceMap?: boolean;
-        sourceRoot?: string;
-        suppressExcessPropertyErrors?: boolean;
-        suppressImplicitAnyIndexErrors?: boolean;
-        target?: ScriptTarget;
-        version?: boolean;
-        watch?: boolean;
-        isolatedModules?: boolean;
-        experimentalDecorators?: boolean;
-        emitDecoratorMetadata?: boolean;
-        moduleResolution?: ModuleResolutionKind;
-        allowUnusedLabels?: boolean;
-        allowUnreachableCode?: boolean;
-        noImplicitReturns?: boolean;
-        noFallthroughCasesInSwitch?: boolean;
-        forceConsistentCasingInFileNames?: boolean;
-        baseUrl?: string;
-        paths?: PathSubstitutions;
-        rootDirs?: RootPaths;
-        traceResolution?: boolean;
-        allowSyntheticDefaultImports?: boolean;
-        allowJs?: boolean;
-        noImplicitUseStrict?: boolean;
-        strictNullChecks?: boolean;
-        skipLibCheck?: boolean;
-        listEmittedFiles?: boolean;
-        lib?: string[];
-        stripInternal?: boolean;
-        skipDefaultLibCheck?: boolean;
-        suppressOutputPathCheck?: boolean;
-        configFilePath?: string;
-        typesRoot?: string;
-        types?: string[];
-        list?: string[];
-        [option: string]: CompilerOptionsValue | undefined;
-    }
-    interface TypingOptions {
-        enableAutoDiscovery?: boolean;
-        include?: string[];
-        exclude?: string[];
-        [option: string]: string[] | boolean | undefined;
-    }
-    interface DiscoverTypingsInfo {
-        fileNames: string[];
-        projectRootPath: string;
-        safeListPath: string;
-        packageNameToTypingLocation: Map<string>;
-        typingOptions: TypingOptions;
-        compilerOptions: CompilerOptions;
-    }
-    enum ModuleKind {
-        None = 0,
-        CommonJS = 1,
-        AMD = 2,
-        UMD = 3,
-        System = 4,
-        ES6 = 5,
-        ES2015 = 5,
-    }
-    const enum JsxEmit {
-        None = 0,
-        Preserve = 1,
-        React = 2,
-    }
-    const enum NewLineKind {
-        CarriageReturnLineFeed = 0,
-        LineFeed = 1,
-    }
-    interface LineAndCharacter {
-        line: number;
-        character: number;
-    }
-    const enum ScriptKind {
-        Unknown = 0,
-        JS = 1,
-        JSX = 2,
-        TS = 3,
-        TSX = 4,
-    }
-    const enum ScriptTarget {
-        ES3 = 0,
-        ES5 = 1,
-        ES6 = 2,
-        ES2015 = 2,
-        Latest = 2,
-    }
-    const enum LanguageVariant {
-        Standard = 0,
-        JSX = 1,
-    }
-    const enum DiagnosticStyle {
-        Simple = 0,
-        Pretty = 1,
-    }
-    interface ParsedCommandLine {
-        options: CompilerOptions;
-        typingOptions?: TypingOptions;
-        fileNames: string[];
-        raw?: any;
-        errors: Diagnostic[];
-    }
-    interface CommandLineOptionBase {
-        name: string;
-        type: "string" | "number" | "boolean" | "object" | "list" | Map<number | string>;
-        isFilePath?: boolean;
-        shortName?: string;
-        description?: DiagnosticMessage;
-        paramType?: DiagnosticMessage;
-        experimental?: boolean;
-        isTSConfigOnly?: boolean;
-    }
-    interface CommandLineOptionOfPrimitiveType extends CommandLineOptionBase {
-        type: "string" | "number" | "boolean";
-    }
-    interface CommandLineOptionOfCustomType extends CommandLineOptionBase {
-        type: Map<number | string>;
-    }
-    interface TsConfigOnlyOption extends CommandLineOptionBase {
-        type: "object";
-    }
-    interface CommandLineOptionOfListType extends CommandLineOptionBase {
-        type: "list";
-        element: CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType;
-    }
-    type CommandLineOption = CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType | TsConfigOnlyOption | CommandLineOptionOfListType;
-    const enum CharacterCodes {
-        nullCharacter = 0,
-        maxAsciiCharacter = 127,
-        lineFeed = 10,
-        carriageReturn = 13,
-        lineSeparator = 8232,
-        paragraphSeparator = 8233,
-        nextLine = 133,
-        space = 32,
-        nonBreakingSpace = 160,
-        enQuad = 8192,
-        emQuad = 8193,
-        enSpace = 8194,
-        emSpace = 8195,
-        threePerEmSpace = 8196,
-        fourPerEmSpace = 8197,
-        sixPerEmSpace = 8198,
-        figureSpace = 8199,
-        punctuationSpace = 8200,
-        thinSpace = 8201,
-        hairSpace = 8202,
-        zeroWidthSpace = 8203,
-        narrowNoBreakSpace = 8239,
-        ideographicSpace = 12288,
-        mathematicalSpace = 8287,
-        ogham = 5760,
-        _ = 95,
-        $ = 36,
-        _0 = 48,
-        _1 = 49,
-        _2 = 50,
-        _3 = 51,
-        _4 = 52,
-        _5 = 53,
-        _6 = 54,
-        _7 = 55,
-        _8 = 56,
-        _9 = 57,
-        a = 97,
-        b = 98,
-        c = 99,
-        d = 100,
-        e = 101,
-        f = 102,
-        g = 103,
-        h = 104,
-        i = 105,
-        j = 106,
-        k = 107,
-        l = 108,
-        m = 109,
-        n = 110,
-        o = 111,
-        p = 112,
-        q = 113,
-        r = 114,
-        s = 115,
-        t = 116,
-        u = 117,
-        v = 118,
-        w = 119,
-        x = 120,
-        y = 121,
-        z = 122,
-        A = 65,
-        B = 66,
-        C = 67,
-        D = 68,
-        E = 69,
-        F = 70,
-        G = 71,
-        H = 72,
-        I = 73,
-        J = 74,
-        K = 75,
-        L = 76,
-        M = 77,
-        N = 78,
-        O = 79,
-        P = 80,
-        Q = 81,
-        R = 82,
-        S = 83,
-        T = 84,
-        U = 85,
-        V = 86,
-        W = 87,
-        X = 88,
-        Y = 89,
-        Z = 90,
-        ampersand = 38,
-        asterisk = 42,
-        at = 64,
-        backslash = 92,
-        backtick = 96,
-        bar = 124,
-        caret = 94,
-        closeBrace = 125,
-        closeBracket = 93,
-        closeParen = 41,
-        colon = 58,
-        comma = 44,
-        dot = 46,
-        doubleQuote = 34,
-        equals = 61,
-        exclamation = 33,
-        greaterThan = 62,
-        hash = 35,
-        lessThan = 60,
-        minus = 45,
-        openBrace = 123,
-        openBracket = 91,
-        openParen = 40,
-        percent = 37,
-        plus = 43,
-        question = 63,
-        semicolon = 59,
-        singleQuote = 39,
-        slash = 47,
-        tilde = 126,
-        backspace = 8,
-        formFeed = 12,
-        byteOrderMark = 65279,
-        tab = 9,
-        verticalTab = 11,
-    }
-    interface ModuleResolutionHost {
-        fileExists(fileName: string): boolean;
-        readFile(fileName: string): string;
-        trace?(s: string): void;
-        directoryExists?(directoryName: string): boolean;
-        realpath?(path: string): string;
-        getCurrentDirectory?(): string;
-    }
-    interface ResolvedModule {
-        resolvedFileName: string;
-        isExternalLibraryImport?: boolean;
-    }
-    interface ResolvedModuleWithFailedLookupLocations {
-        resolvedModule: ResolvedModule;
-        failedLookupLocations: string[];
-    }
-    interface ResolvedTypeReferenceDirective {
-        primary: boolean;
-        resolvedFileName?: string;
-    }
-    interface ResolvedTypeReferenceDirectiveWithFailedLookupLocations {
-        resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective;
-        failedLookupLocations: string[];
-    }
-    interface CompilerHost extends ModuleResolutionHost {
-        getSourceFile(fileName: string, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile;
-        getSourceFileByPath?(fileName: string, path: Path, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile;
-        getCancellationToken?(): CancellationToken;
-        getDefaultLibFileName(options: CompilerOptions): string;
-        getDefaultLibLocation?(): string;
-        getDefaultTypeDirectiveNames?(rootPath: string): string[];
-        writeFile: WriteFileCallback;
-        getCurrentDirectory(): string;
-        getCanonicalFileName(fileName: string): string;
-        useCaseSensitiveFileNames(): boolean;
-        getNewLine(): string;
-        resolveModuleNames?(moduleNames: string[], containingFile: string): ResolvedModule[];
-        resolveTypeReferenceDirectives?(typeReferenceDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
-    }
-    interface TextSpan {
-        start: number;
-        length: number;
-    }
-    interface TextChangeRange {
-        span: TextSpan;
-        newLength: number;
-    }
-    interface DiagnosticCollection {
-        add(diagnostic: Diagnostic): void;
-        getGlobalDiagnostics(): Diagnostic[];
-        getDiagnostics(fileName?: string): Diagnostic[];
-        getModificationCount(): number;
-        reattachFileDiagnostics(newFile: SourceFile): void;
-    }
-}
-declare namespace ts {
-    const enum Ternary {
-        False = 0,
-        Maybe = 1,
-        True = -1,
-    }
-    function createFileMap<T>(keyMapper?: (key: string) => string): FileMap<T>;
-    function toPath(fileName: string, basePath: string, getCanonicalFileName: (path: string) => string): Path;
-    const enum Comparison {
-        LessThan = -1,
-        EqualTo = 0,
-        GreaterThan = 1,
-    }
-    function forEach<T, U>(array: T[], callback: (element: T, index: number) => U): U;
-    function contains<T>(array: T[], value: T, areEqual?: (a: T, b: T) => boolean): boolean;
-    function indexOf<T>(array: T[], value: T): number;
-    function countWhere<T>(array: T[], predicate: (x: T) => boolean): number;
-    function filter<T>(array: T[], f: (x: T) => boolean): T[];
-    function map<T, U>(array: T[], f: (x: T) => U): U[];
-    function concatenate<T>(array1: T[], array2: T[]): T[];
-    function deduplicate<T>(array: T[], areEqual?: (a: T, b: T) => boolean): T[];
-    function sum(array: any[], prop: string): number;
-    function addRange<T>(to: T[], from: T[]): void;
-    function rangeEquals<T>(array1: T[], array2: T[], pos: number, end: number): boolean;
-    function lastOrUndefined<T>(array: T[]): T;
-    function binarySearch(array: number[], value: number): number;
-    function reduceLeft<T>(array: T[], f: (a: T, x: T) => T): T;
-    function reduceLeft<T, U>(array: T[], f: (a: U, x: T) => U, initial: U): U;
-    function reduceRight<T>(array: T[], f: (a: T, x: T) => T): T;
-    function reduceRight<T, U>(array: T[], f: (a: U, x: T) => U, initial: U): U;
-    function hasProperty<T>(map: Map<T>, key: string): boolean;
-    function getKeys<T>(map: Map<T>): string[];
-    function getProperty<T>(map: Map<T>, key: string): T;
-    function isEmpty<T>(map: Map<T>): boolean;
-    function clone<T>(object: T): T;
-    function extend<T1 extends Map<{}>, T2 extends Map<{}>>(first: T1, second: T2): T1 & T2;
-    function forEachValue<T, U>(map: Map<T>, callback: (value: T) => U): U;
-    function forEachKey<T, U>(map: Map<T>, callback: (key: string) => U): U;
-    function lookUp<T>(map: Map<T>, key: string): T;
-    function copyMap<T>(source: Map<T>, target: Map<T>): void;
-    function arrayToMap<T>(array: T[], makeKey: (value: T) => string): Map<T>;
-    function reduceProperties<T, U>(map: Map<T>, callback: (aggregate: U, value: T, key: string) => U, initial: U): U;
-    function isArray(value: any): value is any[];
-    function memoize<T>(callback: () => T): () => T;
-    let localizedDiagnosticMessages: Map<string>;
-    function getLocaleSpecificMessage(message: DiagnosticMessage): string;
-    function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage, ...args: any[]): Diagnostic;
-    function formatMessage(dummy: any, message: DiagnosticMessage): string;
-    function createCompilerDiagnostic(message: DiagnosticMessage, ...args: any[]): Diagnostic;
-    function chainDiagnosticMessages(details: DiagnosticMessageChain, message: DiagnosticMessage, ...args: any[]): DiagnosticMessageChain;
-    function concatenateDiagnosticMessageChains(headChain: DiagnosticMessageChain, tailChain: DiagnosticMessageChain): DiagnosticMessageChain;
-    function compareValues<T>(a: T, b: T): Comparison;
-    function compareDiagnostics(d1: Diagnostic, d2: Diagnostic): Comparison;
-    function sortAndDeduplicateDiagnostics(diagnostics: Diagnostic[]): Diagnostic[];
-    function deduplicateSortedDiagnostics(diagnostics: Diagnostic[]): Diagnostic[];
-    function normalizeSlashes(path: string): string;
-    function getRootLength(path: string): number;
-    let directorySeparator: string;
-    function normalizePath(path: string): string;
-    function getDirectoryPath(path: Path): Path;
-    function getDirectoryPath(path: string): string;
-    function isUrl(path: string): boolean;
-    function isRootedDiskPath(path: string): boolean;
-    function getNormalizedPathComponents(path: string, currentDirectory: string): string[];
-    function getNormalizedAbsolutePath(fileName: string, currentDirectory: string): string;
-    function getNormalizedPathFromPathComponents(pathComponents: string[]): string;
-    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl: string, relativeOrAbsolutePath: string, currentDirectory: string, getCanonicalFileName: (fileName: string) => string, isAbsolutePathAnUrl: boolean): string;
-    function getBaseFileName(path: string): string;
-    function combinePaths(path1: string, path2: string): string;
-    function fileExtensionIs(path: string, extension: string): boolean;
-    function ensureScriptKind(fileName: string, scriptKind?: ScriptKind): ScriptKind;
-    function getScriptKindFromFileName(fileName: string): ScriptKind;
-    const supportedTypeScriptExtensions: string[];
-    const supportedJavascriptExtensions: string[];
-    function getSupportedExtensions(options?: CompilerOptions): string[];
-    function isSupportedSourceFileName(fileName: string, compilerOptions?: CompilerOptions): boolean;
-    function removeFileExtension(path: string): string;
-    interface ObjectAllocator {
-        getNodeConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Node;
-        getSourceFileConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => SourceFile;
-        getSymbolConstructor(): new (flags: SymbolFlags, name: string) => Symbol;
-        getTypeConstructor(): new (checker: TypeChecker, flags: TypeFlags) => Type;
-        getSignatureConstructor(): new (checker: TypeChecker) => Signature;
-    }
-    let objectAllocator: ObjectAllocator;
-    const enum AssertionLevel {
-        None = 0,
-        Normal = 1,
-        Aggressive = 2,
-        VeryAggressive = 3,
-    }
-    namespace Debug {
-        function shouldAssert(level: AssertionLevel): boolean;
-        function assert(expression: boolean, message?: string, verboseDebugInfo?: () => string): void;
-        function fail(message?: string): void;
-    }
-    function copyListRemovingItem<T>(item: T, list: T[]): T[];
-    function createGetCanonicalFileName(useCaseSensitivefileNames: boolean): (fileName: string) => string;
-}
-declare namespace ts {
-    type FileWatcherCallback = (fileName: string, removed?: boolean) => void;
-    type DirectoryWatcherCallback = (directoryName: string) => void;
-    interface WatchedFile {
-        fileName: string;
-        callback: FileWatcherCallback;
-        mtime?: Date;
-    }
-    interface System {
-        args: string[];
-        newLine: string;
-        useCaseSensitiveFileNames: boolean;
-        write(s: string): void;
-        readFile(path: string, encoding?: string): string;
-        writeFile(path: string, data: string, writeByteOrderMark?: boolean): void;
-        watchFile?(path: string, callback: FileWatcherCallback): FileWatcher;
-        watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
-        resolvePath(path: string): string;
-        fileExists(path: string): boolean;
-        directoryExists(path: string): boolean;
-        createDirectory(path: string): void;
-        getExecutingFilePath(): string;
-        getCurrentDirectory(): string;
-        getDirectories(path: string): string[];
-        readDirectory(path: string, extension?: string, exclude?: string[]): string[];
-        getModifiedTime?(path: string): Date;
-        createHash?(data: string): string;
-        getMemoryUsage?(): number;
-        exit(exitCode?: number): void;
-        realpath?(path: string): string;
-    }
-    interface FileWatcher {
-        close(): void;
-    }
-    interface DirectoryWatcher extends FileWatcher {
-        directoryName: string;
-        referenceCount: number;
-    }
-    var sys: System;
-}
-declare namespace ts {
-    var Diagnostics: {
-        Unterminated_string_literal: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Identifier_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_file_cannot_have_a_reference_to_itself: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Trailing_comma_not_allowed: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Asterisk_Slash_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unexpected_token: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_rest_parameter_must_be_last_in_a_parameter_list: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Parameter_cannot_have_question_mark_and_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_required_parameter_cannot_follow_an_optional_parameter: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_index_signature_cannot_have_a_rest_parameter: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_index_signature_parameter_cannot_have_an_accessibility_modifier: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_index_signature_parameter_cannot_have_a_question_mark: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_index_signature_parameter_cannot_have_an_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_index_signature_must_have_a_type_annotation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_index_signature_parameter_must_have_a_type_annotation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_index_signature_parameter_type_must_be_string_or_number: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Accessibility_modifier_already_seen: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_modifier_must_precede_1_modifier: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_modifier_already_seen: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_modifier_cannot_appear_on_a_class_element: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        super_must_be_followed_by_an_argument_list_or_member_access: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Only_ambient_modules_can_use_quoted_names: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Statements_are_not_allowed_in_ambient_contexts: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Initializers_are_not_allowed_in_ambient_contexts: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_modifier_cannot_be_used_in_an_ambient_context: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_modifier_cannot_be_used_with_a_class_declaration: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_modifier_cannot_be_used_here: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_modifier_cannot_appear_on_a_data_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_modifier_cannot_appear_on_a_module_or_namespace_element: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_0_modifier_cannot_be_used_with_an_interface_declaration: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_rest_parameter_cannot_be_optional: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_rest_parameter_cannot_have_an_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_set_accessor_must_have_exactly_one_parameter: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_set_accessor_cannot_have_an_optional_parameter: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_set_accessor_parameter_cannot_have_an_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_set_accessor_cannot_have_rest_parameter: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_get_accessor_cannot_have_parameters: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_0_is_not_a_valid_async_function_return_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_async_function_or_method_must_have_a_valid_awaitable_return_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Operand_for_await_does_not_have_a_valid_callable_then_member: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Enum_member_must_have_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_export_assignment_cannot_be_used_in_a_namespace: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_modifier_cannot_appear_on_a_type_member: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_modifier_cannot_appear_on_an_index_signature: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_0_modifier_cannot_be_used_with_an_import_declaration: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Invalid_reference_directive_syntax: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_accessor_cannot_be_declared_in_an_ambient_context: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_modifier_cannot_appear_on_a_constructor_declaration: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_modifier_cannot_appear_on_a_parameter: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_parameters_cannot_appear_on_a_constructor_declaration: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_annotation_cannot_appear_on_a_constructor_declaration: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_accessor_cannot_have_type_parameters: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_set_accessor_cannot_have_a_return_type_annotation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_index_signature_must_have_exactly_one_parameter: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_list_cannot_be_empty: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_parameter_list_cannot_be_empty: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_argument_list_cannot_be_empty: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Invalid_use_of_0_in_strict_mode: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        with_statements_are_not_allowed_in_strict_mode: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        delete_cannot_be_called_on_an_identifier_in_strict_mode: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Jump_target_cannot_cross_function_boundary: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_return_statement_can_only_be_used_within_a_function_body: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Expression_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Duplicate_label_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_export_assignment_cannot_have_modifiers: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Octal_literals_are_not_allowed_in_strict_mode: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_tuple_type_element_list_cannot_be_empty: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Variable_declaration_list_cannot_be_empty: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Digit_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Hexadecimal_digit_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unexpected_end_of_text: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Invalid_character: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Declaration_or_statement_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Statement_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        case_or_default_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_or_signature_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Enum_member_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Variable_declaration_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Argument_expression_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_assignment_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Expression_or_comma_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Parameter_declaration_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_parameter_declaration_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_argument_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        String_literal_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Line_break_not_permitted_here: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        or_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Declaration_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Import_declarations_in_a_namespace_cannot_reference_a_module: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        File_name_0_differs_from_already_included_file_name_1_only_in_casing: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        const_declarations_must_be_initialized: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        const_declarations_can_only_be_declared_inside_a_block: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        let_declarations_can_only_be_declared_inside_a_block: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unterminated_template_literal: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unterminated_regular_expression_literal: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_object_member_cannot_be_declared_optional: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_yield_expression_is_only_allowed_in_a_generator_body: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Computed_property_names_are_not_allowed_in_enums: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_comma_expression_is_not_allowed_in_a_computed_property_name: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        extends_clause_already_seen: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        extends_clause_must_precede_implements_clause: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Classes_can_only_extend_a_single_class: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        implements_clause_already_seen: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Interface_declaration_cannot_have_implements_clause: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Binary_digit_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Octal_digit_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unexpected_token_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_destructuring_pattern_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Array_element_destructuring_pattern_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_destructuring_declaration_must_have_an_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_implementation_cannot_be_declared_in_ambient_contexts: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Modifiers_cannot_appear_here: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Merge_conflict_marker_encountered: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_rest_element_cannot_have_an_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_parameter_property_may_not_be_a_binding_pattern: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_import_declaration_cannot_have_modifiers: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Module_0_has_no_default_export: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_export_declaration_cannot_have_modifiers: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Export_declarations_are_not_permitted_in_a_namespace: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Catch_clause_variable_name_must_be_an_identifier: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Catch_clause_variable_cannot_have_a_type_annotation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Catch_clause_variable_cannot_have_an_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unterminated_Unicode_escape_sequence: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Line_terminator_not_permitted_before_arrow: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Decorators_are_not_valid_here: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_class_declaration_without_the_default_modifier_must_have_a_name: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Export_assignment_is_not_supported_when_module_flag_is_system: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Generators_are_not_allowed_in_an_ambient_context: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_overload_signature_cannot_be_declared_as_a_generator: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_tag_already_specified: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Signature_0_must_have_a_type_predicate: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_find_parameter_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_predicate_0_is_not_assignable_to_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Parameter_0_is_not_in_the_same_position_as_parameter_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_type_predicate_cannot_reference_a_rest_parameter: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_export_assignment_can_only_be_used_in_a_module: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_import_declaration_can_only_be_used_in_a_namespace_or_module: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_export_declaration_can_only_be_used_in_a_module: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_modifier_cannot_be_used_with_1_modifier: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Abstract_methods_can_only_appear_within_an_abstract_class: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_interface_property_cannot_have_an_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_type_literal_property_cannot_have_an_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_class_member_cannot_have_the_0_keyword: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        with_statements_are_not_allowed_in_an_async_function_block: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        await_expression_is_only_allowed_within_an_async_function: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_body_of_an_if_statement_cannot_be_the_empty_statement: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Global_module_exports_may_only_appear_in_module_files: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Global_module_exports_may_only_appear_in_declaration_files: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Global_module_exports_may_only_appear_at_top_level: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Duplicate_identifier_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Static_members_cannot_reference_class_type_parameters: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Circular_definition_of_import_alias_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_find_name_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Module_0_has_no_exported_member_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        File_0_is_not_a_module: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_find_module_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_0_recursively_references_itself_as_a_base_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_class_may_only_extend_another_class: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_interface_may_only_extend_a_class_or_another_interface: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_parameter_0_has_a_circular_constraint: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Generic_type_0_requires_1_type_argument_s: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_0_is_not_generic: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Global_type_0_must_be_a_class_or_interface_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Global_type_0_must_have_1_type_parameter_s: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_find_global_type_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Named_property_0_of_types_1_and_2_are_not_identical: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Interface_0_cannot_simultaneously_extend_types_1_and_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Excessive_stack_depth_comparing_types_0_and_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_0_is_not_assignable_to_type_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_redeclare_exported_variable_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_is_missing_in_type_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_is_private_in_type_1_but_not_in_type_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Types_of_property_0_are_incompatible: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_is_optional_in_type_1_but_required_in_type_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Types_of_parameters_0_and_1_are_incompatible: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Index_signature_is_missing_in_type_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Index_signatures_are_incompatible: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        this_cannot_be_referenced_in_a_module_or_namespace_body: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        this_cannot_be_referenced_in_current_location: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        this_cannot_be_referenced_in_constructor_arguments: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        this_cannot_be_referenced_in_a_static_property_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        super_can_only_be_referenced_in_a_derived_class: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        super_cannot_be_referenced_in_constructor_arguments: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_does_not_exist_on_type_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_is_private_and_only_accessible_within_class_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_0_does_not_satisfy_the_constraint_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Supplied_parameters_do_not_match_any_signature_of_call_target: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Untyped_function_calls_may_not_accept_type_arguments: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Only_a_void_function_can_be_called_with_the_new_keyword: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_0_cannot_be_converted_to_type_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        No_best_common_type_exists_among_return_expressions: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Invalid_left_hand_side_of_assignment_expression: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Operator_0_cannot_be_applied_to_types_1_and_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_parameter_name_cannot_be_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_parameter_property_is_only_allowed_in_a_constructor_implementation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_rest_parameter_must_be_of_an_array_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Parameter_0_cannot_be_referenced_in_its_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Duplicate_string_index_signature: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Duplicate_number_index_signature: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Constructors_for_derived_classes_must_contain_a_super_call: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_get_accessor_must_return_a_value: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Getter_and_setter_accessors_do_not_agree_in_visibility: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        get_and_set_accessor_must_have_the_same_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_signature_with_an_implementation_cannot_use_a_string_literal_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Overload_signatures_must_all_be_exported_or_non_exported: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Overload_signatures_must_all_be_ambient_or_non_ambient: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Overload_signatures_must_all_be_public_private_or_protected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Overload_signatures_must_all_be_optional_or_required: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Function_overload_must_be_static: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Function_overload_must_not_be_static: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Function_implementation_name_must_be_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Constructor_implementation_is_missing: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Function_implementation_is_missing_or_not_immediately_following_the_declaration: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Multiple_constructor_implementations_are_not_allowed: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Duplicate_function_implementation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Overload_signature_is_not_compatible_with_function_implementation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Declaration_name_conflicts_with_built_in_global_identifier_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Invalid_left_hand_side_in_for_in_statement: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Setters_cannot_return_a_value: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        All_symbols_within_a_with_block_will_be_resolved_to_any: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Class_name_cannot_be_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Class_0_incorrectly_extends_base_class_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Class_static_side_0_incorrectly_extends_base_class_static_side_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Class_0_incorrectly_implements_interface_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_class_may_only_implement_another_class_or_interface: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Interface_name_cannot_be_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        All_declarations_of_0_must_have_identical_type_parameters: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Interface_0_incorrectly_extends_interface_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Enum_name_cannot_be_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Ambient_module_declaration_cannot_specify_relative_module_name: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Import_name_cannot_be_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Import_declaration_conflicts_with_local_declaration_of_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Types_have_separate_declarations_of_a_private_property_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_is_protected_in_type_1_but_public_in_type_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Block_scoped_variable_0_used_before_its_declaration: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_redeclare_block_scoped_variable_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_enum_member_cannot_have_a_numeric_name: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Variable_0_is_used_before_being_assigned: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_alias_0_circularly_references_itself: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_alias_name_cannot_be_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_AMD_module_cannot_have_multiple_name_assignments: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_0_has_no_property_1_and_no_string_index_signature: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_0_has_no_property_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_0_is_not_an_array_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_rest_element_must_be_last_in_an_array_destructuring_pattern: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        this_cannot_be_referenced_in_a_computed_property_name: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        super_cannot_be_referenced_in_a_computed_property_name: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_find_global_value_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_0_operator_cannot_be_applied_to_type_symbol: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Enum_declarations_must_all_be_const_or_non_const: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        In_const_enum_declarations_member_initializer_must_be_constant_expression: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_const_enum_member_can_only_be_accessed_using_a_string_literal: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_does_not_exist_on_const_enum_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Export_declaration_conflicts_with_exported_declaration_of_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Invalid_left_hand_side_in_for_of_statement: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_iterator_must_have_a_next_method: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_redeclare_identifier_0_in_catch_clause: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_0_is_not_an_array_type_or_a_string_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_rest_element_cannot_contain_a_binding_pattern: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_find_namespace_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        No_best_common_type_exists_among_yield_expressions: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_generator_cannot_have_a_void_type_annotation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_0_is_not_a_constructor_function_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        No_base_constructor_has_the_specified_number_of_type_arguments: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Base_constructor_return_type_0_is_not_a_class_or_interface_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Base_constructors_must_all_have_the_same_return_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_create_an_instance_of_the_abstract_class_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Overload_signatures_must_all_be_abstract_or_non_abstract: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Classes_containing_abstract_methods_must_be_marked_abstract: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        All_declarations_of_an_abstract_method_must_be_consecutive: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_function_expression: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        yield_expressions_cannot_be_used_in_a_parameter_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        await_expressions_cannot_be_used_in_a_parameter_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_module_cannot_have_multiple_default_exports: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_is_incompatible_with_index_signature: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Object_is_possibly_null: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Object_is_possibly_undefined: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Object_is_possibly_null_or_undefined: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_function_returning_never_cannot_have_a_reachable_end_point: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        JSX_element_attributes_type_0_may_not_be_a_union_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_in_type_1_is_not_assignable_to_type_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_global_type_JSX_0_may_not_have_more_than_one_property: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_emit_namespaced_JSX_elements_in_React: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        JSX_expressions_must_have_one_parent_element: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_0_provides_no_match_for_the_signature_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Invalid_module_name_in_augmentation_module_0_cannot_be_found: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Accessors_must_both_be_abstract_or_non_abstract: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_0_is_not_comparable_to_type_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_this_parameter_must_be_the_first_parameter: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_constructor_cannot_have_a_this_parameter: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        get_and_set_accessor_must_have_the_same_this_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_this_types_of_each_signature_are_incompatible: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Identifier_0_must_be_imported_from_a_module: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        All_declarations_of_0_must_have_identical_modifiers: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Import_declaration_0_is_using_private_name_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
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-            key: string;
-            message: string;
-        };
-        DIRECTORY: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Compilation_complete_Watching_for_file_changes: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Generates_corresponding_map_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Compiler_option_0_expects_an_argument: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unterminated_quoted_string_in_response_file_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Argument_for_0_option_must_be_Colon_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unsupported_locale_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unable_to_open_file_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Corrupted_locale_file_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        File_0_not_found: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        NEWLINE: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Option_0_can_only_be_specified_in_tsconfig_json_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Enables_experimental_support_for_ES7_decorators: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Enables_experimental_support_for_emitting_type_metadata_for_decorators: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Enables_experimental_support_for_ES7_async_functions: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Successfully_created_a_tsconfig_json_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Suppress_excess_property_checks_for_object_literals: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Stylize_errors_and_messages_using_color_and_context_experimental: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Do_not_report_errors_on_unused_labels: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Report_error_when_not_all_code_paths_in_function_return_a_value: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Report_errors_for_fallthrough_cases_in_switch_statement: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Do_not_report_errors_on_unreachable_code: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Disallow_inconsistently_cased_references_to_the_same_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Specify_library_files_to_be_included_in_the_compilation_Colon: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Specify_JSX_code_generation_Colon_preserve_or_react: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Only_amd_and_system_modules_are_supported_alongside_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Base_directory_to_resolve_non_absolute_module_names: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Enable_tracing_of_the_name_resolution_process: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Resolving_module_0_from_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Explicitly_specified_module_resolution_kind_Colon_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Module_resolution_kind_is_not_specified_using_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Module_name_0_was_successfully_resolved_to_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Module_name_0_was_not_resolved: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Module_name_0_matched_pattern_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Trying_substitution_0_candidate_module_location_Colon_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Resolving_module_name_0_relative_to_base_url_1_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Loading_module_as_file_Slash_folder_candidate_module_location_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        File_0_does_not_exist: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        File_0_exist_use_it_as_a_name_resolution_result: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Loading_module_0_from_node_modules_folder: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Found_package_json_at_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        package_json_does_not_have_types_field: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        package_json_has_0_field_1_that_references_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Allow_javascript_files_to_be_compiled: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Option_0_should_have_array_of_strings_as_a_value: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Checking_if_0_is_the_longest_matching_prefix_for_1_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Expected_type_of_0_field_in_package_json_to_be_string_got_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Longest_matching_prefix_for_0_is_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Loading_0_from_the_root_dir_1_candidate_location_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Trying_other_entries_in_rootDirs: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Module_resolution_using_rootDirs_has_failed: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Do_not_emit_use_strict_directives_in_module_output: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Enable_strict_null_checks: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unknown_option_excludes_Did_you_mean_exclude: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Raise_error_on_this_expressions_with_an_implied_any_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Resolving_using_primary_search_paths: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Resolving_from_node_modules_folder: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_reference_directive_0_was_not_resolved: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Resolving_with_primary_search_path_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Root_directory_cannot_be_determined_skipping_primary_search_paths: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Type_declaration_files_to_be_included_in_compilation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Looking_up_in_node_modules_folder_initial_location_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        The_config_file_0_found_doesn_t_contain_any_source_files: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Resolving_real_path_for_0_result_1: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Variable_0_implicitly_has_an_1_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Parameter_0_implicitly_has_an_1_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Member_0_implicitly_has_an_1_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Index_signature_of_object_type_implicitly_has_an_any_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Object_literal_s_property_0_implicitly_has_an_1_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Rest_parameter_0_implicitly_has_an_any_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unreachable_code_detected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unused_label: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Fallthrough_case_in_switch: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Not_all_code_paths_return_a_value: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Binding_element_0_implicitly_has_an_1_type: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        You_cannot_rename_this_element: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        import_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        export_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        type_parameter_declarations_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        implements_clauses_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        interface_declarations_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        module_declarations_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        type_aliases_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        _0_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        types_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        type_arguments_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        parameter_modifiers_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        property_declarations_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        enum_declarations_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        type_assertion_expressions_can_only_be_used_in_a_ts_file: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        class_expressions_are_not_currently_supported: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        JSX_attributes_must_only_be_assigned_a_non_empty_expression: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Expected_corresponding_JSX_closing_tag_for_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        JSX_attribute_expected: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Cannot_use_JSX_unless_the_jsx_flag_is_provided: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        JSX_element_0_has_no_corresponding_closing_tag: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-        Unknown_typing_option_0: {
-            code: number;
-            category: DiagnosticCategory;
-            key: string;
-            message: string;
-        };
-    };
-}
-declare namespace ts {
-    interface ErrorCallback {
-        (message: DiagnosticMessage, length: number): void;
-    }
-    function tokenIsIdentifierOrKeyword(token: SyntaxKind): boolean;
-    interface Scanner {
-        getStartPos(): number;
-        getToken(): SyntaxKind;
-        getTextPos(): number;
-        getTokenPos(): number;
-        getTokenText(): string;
-        getTokenValue(): string;
-        hasExtendedUnicodeEscape(): boolean;
-        hasPrecedingLineBreak(): boolean;
-        isIdentifier(): boolean;
-        isReservedWord(): boolean;
-        isUnterminated(): boolean;
-        reScanGreaterToken(): SyntaxKind;
-        reScanSlashToken(): SyntaxKind;
-        reScanTemplateToken(): SyntaxKind;
-        scanJsxIdentifier(): SyntaxKind;
-        reScanJsxToken(): SyntaxKind;
-        scanJsxToken(): SyntaxKind;
-        scanJSDocToken(): SyntaxKind;
-        scan(): SyntaxKind;
-        setText(text: string, start?: number, length?: number): void;
-        setOnError(onError: ErrorCallback): void;
-        setScriptTarget(scriptTarget: ScriptTarget): void;
-        setLanguageVariant(variant: LanguageVariant): void;
-        setTextPos(textPos: number): void;
-        lookAhead<T>(callback: () => T): T;
-        scanRange<T>(start: number, length: number, callback: () => T): T;
-        tryScan<T>(callback: () => T): T;
-    }
-    function isUnicodeIdentifierStart(code: number, languageVersion: ScriptTarget): boolean;
-    function tokenToString(t: SyntaxKind): string;
-    function stringToToken(s: string): SyntaxKind;
-    function computeLineStarts(text: string): number[];
-    function getPositionOfLineAndCharacter(sourceFile: SourceFile, line: number, character: number): number;
-    function computePositionOfLineAndCharacter(lineStarts: number[], line: number, character: number): number;
-    function getLineStarts(sourceFile: SourceFile): number[];
-    function computeLineAndCharacterOfPosition(lineStarts: number[], position: number): {
-        line: number;
-        character: number;
-    };
-    function getLineAndCharacterOfPosition(sourceFile: SourceFile, position: number): LineAndCharacter;
-    function isWhiteSpace(ch: number): boolean;
-    function isLineBreak(ch: number): boolean;
-    function isOctalDigit(ch: number): boolean;
-    function couldStartTrivia(text: string, pos: number): boolean;
-    function skipTrivia(text: string, pos: number, stopAfterLineBreak?: boolean): number;
-    function getLeadingCommentRanges(text: string, pos: number): CommentRange[];
-    function getTrailingCommentRanges(text: string, pos: number): CommentRange[];
-    function getShebang(text: string): string;
-    function isIdentifierStart(ch: number, languageVersion: ScriptTarget): boolean;
-    function isIdentifierPart(ch: number, languageVersion: ScriptTarget): boolean;
-    function isIdentifier(name: string, languageVersion: ScriptTarget): boolean;
-    function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, text?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
-}
-declare namespace ts {
-    let optionDeclarations: CommandLineOption[];
-    let typingOptionDeclarations: CommandLineOption[];
-    interface OptionNameMap {
-        optionNameMap: Map<CommandLineOption>;
-        shortOptionNames: Map<string>;
-    }
-    function getOptionNameMap(): OptionNameMap;
-    function createCompilerDiagnosticForInvalidCustomType(opt: CommandLineOptionOfCustomType): Diagnostic;
-    function parseCustomTypeOption(opt: CommandLineOptionOfCustomType, value: string, errors: Diagnostic[]): number | string;
-    function parseListTypeOption(opt: CommandLineOptionOfListType, value: string, errors: Diagnostic[]): (string | number)[];
-    function parseCommandLine(commandLine: string[], readFile?: (path: string) => string): ParsedCommandLine;
-    function readConfigFile(fileName: string, readFile: (path: string) => string): {
-        config?: any;
-        error?: Diagnostic;
-    };
-    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
-        config?: any;
-        error?: Diagnostic;
-    };
-    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string): ParsedCommandLine;
-    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: CompilerOptions;
-        errors: Diagnostic[];
-    };
-    function convertTypingOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: CompilerOptions;
-        errors: Diagnostic[];
-    };
-}
-declare namespace ts {
-    interface ReferencePathMatchResult {
-        fileReference?: FileReference;
-        diagnosticMessage?: DiagnosticMessage;
-        isNoDefaultLib?: boolean;
-        isTypeReferenceDirective?: boolean;
-    }
-    interface SynthesizedNode extends Node {
-        leadingCommentRanges?: CommentRange[];
-        trailingCommentRanges?: CommentRange[];
-        startsOnNewLine: boolean;
-    }
-    function getDeclarationOfKind(symbol: Symbol, kind: SyntaxKind): Declaration;
-    interface StringSymbolWriter extends SymbolWriter {
-        string(): string;
-    }
-    interface EmitHost extends ScriptReferenceHost {
-        getSourceFiles(): SourceFile[];
-        getCommonSourceDirectory(): string;
-        getCanonicalFileName(fileName: string): string;
-        getNewLine(): string;
-        isEmitBlocked(emitFileName: string): boolean;
-        writeFile: WriteFileCallback;
-    }
-    function getSingleLineStringWriter(): StringSymbolWriter;
-    function releaseStringWriter(writer: StringSymbolWriter): void;
-    function getFullWidth(node: Node): number;
-    function mapIsEqualTo<T>(map1: Map<T>, map2: Map<T>): boolean;
-    function arrayIsEqualTo<T>(array1: T[], array2: T[], equaler?: (a: T, b: T) => boolean): boolean;
-    function hasResolvedModule(sourceFile: SourceFile, moduleNameText: string): boolean;
-    function getResolvedModule(sourceFile: SourceFile, moduleNameText: string): ResolvedModule;
-    function setResolvedModule(sourceFile: SourceFile, moduleNameText: string, resolvedModule: ResolvedModule): void;
-    function setResolvedTypeReferenceDirective(sourceFile: SourceFile, typeReferenceDirectiveName: string, resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective): void;
-    function moduleResolutionIsEqualTo(oldResolution: ResolvedModule, newResolution: ResolvedModule): boolean;
-    function typeDirectiveIsEqualTo(oldResolution: ResolvedTypeReferenceDirective, newResolution: ResolvedTypeReferenceDirective): boolean;
-    function hasChangesInResolutions<T>(names: string[], newResolutions: T[], oldResolutions: Map<T>, comparer: (oldResolution: T, newResolution: T) => boolean): boolean;
-    function containsParseError(node: Node): boolean;
-    function getSourceFileOfNode(node: Node): SourceFile;
-    function isStatementWithLocals(node: Node): boolean;
-    function getStartPositionOfLine(line: number, sourceFile: SourceFile): number;
-    function nodePosToString(node: Node): string;
-    function getStartPosOfNode(node: Node): number;
-    function getEndLinePosition(line: number, sourceFile: SourceFile): number;
-    function nodeIsMissing(node: Node): boolean;
-    function nodeIsPresent(node: Node): boolean;
-    function getTokenPosOfNode(node: Node, sourceFile?: SourceFile): number;
-    function getNonDecoratorTokenPosOfNode(node: Node, sourceFile?: SourceFile): number;
-    function getSourceTextOfNodeFromSourceFile(sourceFile: SourceFile, node: Node, includeTrivia?: boolean): string;
-    function getTextOfNodeFromSourceText(sourceText: string, node: Node): string;
-    function getTextOfNode(node: Node, includeTrivia?: boolean): string;
-    function escapeIdentifier(identifier: string): string;
-    function unescapeIdentifier(identifier: string): string;
-    function makeIdentifierFromModuleName(moduleName: string): string;
-    function isBlockOrCatchScoped(declaration: Declaration): boolean;
-    function isAmbientModule(node: Node): boolean;
-    function isBlockScopedContainerTopLevel(node: Node): boolean;
-    function isGlobalScopeAugmentation(module: ModuleDeclaration): boolean;
-    function isExternalModuleAugmentation(node: Node): boolean;
-    function getEnclosingBlockScopeContainer(node: Node): Node;
-    function isCatchClauseVariableDeclaration(declaration: Declaration): boolean;
-    function declarationNameToString(name: DeclarationName): string;
-    function createDiagnosticForNode(node: Node, message: DiagnosticMessage, arg0?: any, arg1?: any, arg2?: any): Diagnostic;
-    function createDiagnosticForNodeFromMessageChain(node: Node, messageChain: DiagnosticMessageChain): Diagnostic;
-    function getSpanOfTokenAtPosition(sourceFile: SourceFile, pos: number): TextSpan;
-    function getErrorSpanForNode(sourceFile: SourceFile, node: Node): TextSpan;
-    function isExternalOrCommonJsModule(file: SourceFile): boolean;
-    function isDeclarationFile(file: SourceFile): boolean;
-    function isConstEnumDeclaration(node: Node): boolean;
-    function getCombinedNodeFlags(node: Node): NodeFlags;
-    function isConst(node: Node): boolean;
-    function isLet(node: Node): boolean;
-    function isSuperCallExpression(n: Node): boolean;
-    function isPrologueDirective(node: Node): boolean;
-    function getLeadingCommentRangesOfNode(node: Node, sourceFileOfNode: SourceFile): CommentRange[];
-    function getLeadingCommentRangesOfNodeFromText(node: Node, text: string): CommentRange[];
-    function getJsDocComments(node: Node, sourceFileOfNode: SourceFile): CommentRange[];
-    function getJsDocCommentsFromText(node: Node, text: string): CommentRange[];
-    let fullTripleSlashReferencePathRegEx: RegExp;
-    let fullTripleSlashReferenceTypeReferenceDirectiveRegEx: RegExp;
-    let fullTripleSlashAMDReferencePathRegEx: RegExp;
-    function isTypeNode(node: Node): boolean;
-    function forEachReturnStatement<T>(body: Block, visitor: (stmt: ReturnStatement) => T): T;
-    function forEachYieldExpression(body: Block, visitor: (expr: YieldExpression) => void): void;
-    function isVariableLike(node: Node): node is VariableLikeDeclaration;
-    function isAccessor(node: Node): node is AccessorDeclaration;
-    function isClassLike(node: Node): node is ClassLikeDeclaration;
-    function isFunctionLike(node: Node): node is FunctionLikeDeclaration;
-    function isFunctionLikeKind(kind: SyntaxKind): boolean;
-    function introducesArgumentsExoticObject(node: Node): boolean;
-    function isIterationStatement(node: Node, lookInLabeledStatements: boolean): boolean;
-    function isFunctionBlock(node: Node): boolean;
-    function isObjectLiteralMethod(node: Node): node is MethodDeclaration;
-    function isIdentifierTypePredicate(predicate: TypePredicate): predicate is IdentifierTypePredicate;
-    function isThisTypePredicate(predicate: TypePredicate): predicate is ThisTypePredicate;
-    function getContainingFunction(node: Node): FunctionLikeDeclaration;
-    function getContainingFunctionOrModule(node: Node): Node;
-    function getContainingClass(node: Node): ClassLikeDeclaration;
-    function getThisContainer(node: Node, includeArrowFunctions: boolean): Node;
-    function getSuperContainer(node: Node, stopOnFunctions: boolean): Node;
-    function isSuperPropertyOrElementAccess(node: Node): boolean;
-    function getEntityNameFromTypeNode(node: TypeNode): EntityName | Expression;
-    function getInvokedExpression(node: CallLikeExpression): Expression;
-    function nodeCanBeDecorated(node: Node): boolean;
-    function nodeIsDecorated(node: Node): boolean;
-    function isPropertyAccessExpression(node: Node): node is PropertyAccessExpression;
-    function isElementAccessExpression(node: Node): node is ElementAccessExpression;
-    function isJSXTagName(node: Node): boolean;
-    function isExpression(node: Node): boolean;
-    function isExternalModuleNameRelative(moduleName: string): boolean;
-    function isInstantiatedModule(node: ModuleDeclaration, preserveConstEnums: boolean): boolean;
-    function isExternalModuleImportEqualsDeclaration(node: Node): boolean;
-    function getExternalModuleImportEqualsDeclarationExpression(node: Node): Expression;
-    function isInternalModuleImportEqualsDeclaration(node: Node): node is ImportEqualsDeclaration;
-    function isSourceFileJavaScript(file: SourceFile): boolean;
-    function isInJavaScriptFile(node: Node): boolean;
-    function isRequireCall(expression: Node, checkArgumentIsStringLiteral: boolean): expression is CallExpression;
-    function isSingleOrDoubleQuote(charCode: number): boolean;
-    function getSpecialPropertyAssignmentKind(expression: Node): SpecialPropertyAssignmentKind;
-    function getExternalModuleName(node: Node): Expression;
-    function hasQuestionToken(node: Node): boolean;
-    function isJSDocConstructSignature(node: Node): boolean;
-    function getJSDocTypeTag(node: Node): JSDocTypeTag;
-    function getJSDocReturnTag(node: Node): JSDocReturnTag;
-    function getJSDocTemplateTag(node: Node): JSDocTemplateTag;
-    function getCorrespondingJSDocParameterTag(parameter: ParameterDeclaration): JSDocParameterTag;
-    function hasRestParameter(s: SignatureDeclaration): boolean;
-    function hasDeclaredRestParameter(s: SignatureDeclaration): boolean;
-    function isRestParameter(node: ParameterDeclaration): boolean;
-    function isDeclaredRestParam(node: ParameterDeclaration): boolean;
-    function isLiteralKind(kind: SyntaxKind): boolean;
-    function isTextualLiteralKind(kind: SyntaxKind): boolean;
-    function isTemplateLiteralKind(kind: SyntaxKind): boolean;
-    function isBindingPattern(node: Node): node is BindingPattern;
-    function isAssignmentTarget(node: Node): boolean;
-    function isNodeDescendentOf(node: Node, ancestor: Node): boolean;
-    function isInAmbientContext(node: Node): boolean;
-    function isDeclaration(node: Node): boolean;
-    function isStatement(n: Node): boolean;
-    function isClassElement(n: Node): boolean;
-    function isDeclarationName(name: Node): boolean;
-    function isLiteralComputedPropertyDeclarationName(node: Node): boolean;
-    function isIdentifierName(node: Identifier): boolean;
-    function isAliasSymbolDeclaration(node: Node): boolean;
-    function getClassExtendsHeritageClauseElement(node: ClassLikeDeclaration): ExpressionWithTypeArguments;
-    function getClassImplementsHeritageClauseElements(node: ClassLikeDeclaration): NodeArray<ExpressionWithTypeArguments>;
-    function getInterfaceBaseTypeNodes(node: InterfaceDeclaration): NodeArray<ExpressionWithTypeArguments>;
-    function getHeritageClause(clauses: NodeArray<HeritageClause>, kind: SyntaxKind): HeritageClause;
-    function tryResolveScriptReference(host: ScriptReferenceHost, sourceFile: SourceFile, reference: FileReference): SourceFile;
-    function getAncestor(node: Node, kind: SyntaxKind): Node;
-    function getFileReferenceFromReferencePath(comment: string, commentRange: CommentRange): ReferencePathMatchResult;
-    function isKeyword(token: SyntaxKind): boolean;
-    function isTrivia(token: SyntaxKind): boolean;
-    function isAsyncFunctionLike(node: Node): boolean;
-    function isStringOrNumericLiteral(kind: SyntaxKind): boolean;
-    function hasDynamicName(declaration: Declaration): boolean;
-    function isDynamicName(name: DeclarationName): boolean;
-    function isWellKnownSymbolSyntactically(node: Expression): boolean;
-    function getPropertyNameForPropertyNameNode(name: DeclarationName): string;
-    function getPropertyNameForKnownSymbolName(symbolName: string): string;
-    function isESSymbolIdentifier(node: Node): boolean;
-    function isModifierKind(token: SyntaxKind): boolean;
-    function isParameterDeclaration(node: VariableLikeDeclaration): boolean;
-    function getRootDeclaration(node: Node): Node;
-    function nodeStartsNewLexicalEnvironment(n: Node): boolean;
-    function cloneNode<T extends Node>(node: T, location?: TextRange, flags?: NodeFlags, parent?: Node): T;
-    function cloneEntityName(node: EntityName, parent?: Node): EntityName;
-    function isQualifiedName(node: Node): node is QualifiedName;
-    function nodeIsSynthesized(node: Node): boolean;
-    function createSynthesizedNode(kind: SyntaxKind, startsOnNewLine?: boolean): Node;
-    function createSynthesizedNodeArray(): NodeArray<any>;
-    function createDiagnosticCollection(): DiagnosticCollection;
-    function escapeString(s: string): string;
-    function isIntrinsicJsxName(name: string): boolean;
-    function escapeNonAsciiCharacters(s: string): string;
-    interface EmitTextWriter {
-        write(s: string): void;
-        writeTextOfNode(text: string, node: Node): void;
-        writeLine(): void;
-        increaseIndent(): void;
-        decreaseIndent(): void;
-        getText(): string;
-        rawWrite(s: string): void;
-        writeLiteral(s: string): void;
-        getTextPos(): number;
-        getLine(): number;
-        getColumn(): number;
-        getIndent(): number;
-        reset(): void;
-    }
-    function getIndentString(level: number): string;
-    function getIndentSize(): number;
-    function createTextWriter(newLine: String): EmitTextWriter;
-    function getExternalModuleNameFromPath(host: EmitHost, fileName: string): string;
-    function getOwnEmitOutputFilePath(sourceFile: SourceFile, host: EmitHost, extension: string): string;
-    function getDeclarationEmitOutputFilePath(sourceFile: SourceFile, host: EmitHost): string;
-    function getEmitScriptTarget(compilerOptions: CompilerOptions): ScriptTarget;
-    function getEmitModuleKind(compilerOptions: CompilerOptions): ModuleKind;
-    interface EmitFileNames {
-        jsFilePath: string;
-        sourceMapFilePath: string;
-        declarationFilePath: string;
-    }
-    function forEachExpectedEmitFile(host: EmitHost, action: (emitFileNames: EmitFileNames, sourceFiles: SourceFile[], isBundledEmit: boolean) => void, targetSourceFile?: SourceFile): void;
-    function getSourceFilePathInNewDir(sourceFile: SourceFile, host: EmitHost, newDirPath: string): string;
-    function writeFile(host: EmitHost, diagnostics: DiagnosticCollection, fileName: string, data: string, writeByteOrderMark: boolean, sourceFiles?: SourceFile[]): void;
-    function getLineOfLocalPosition(currentSourceFile: SourceFile, pos: number): number;
-    function getLineOfLocalPositionFromLineMap(lineMap: number[], pos: number): number;
-    function getFirstConstructorWithBody(node: ClassLikeDeclaration): ConstructorDeclaration;
-    function getSetAccessorTypeAnnotationNode(accessor: AccessorDeclaration): TypeNode;
-    function getAllAccessorDeclarations(declarations: NodeArray<Declaration>, accessor: AccessorDeclaration): {
-        firstAccessor: AccessorDeclaration;
-        secondAccessor: AccessorDeclaration;
-        getAccessor: AccessorDeclaration;
-        setAccessor: AccessorDeclaration;
-    };
-    function emitNewLineBeforeLeadingComments(lineMap: number[], writer: EmitTextWriter, node: TextRange, leadingComments: CommentRange[]): void;
-    function emitComments(text: string, lineMap: number[], writer: EmitTextWriter, comments: CommentRange[], trailingSeparator: boolean, newLine: string, writeComment: (text: string, lineMap: number[], writer: EmitTextWriter, comment: CommentRange, newLine: string) => void): void;
-    function emitDetachedComments(text: string, lineMap: number[], writer: EmitTextWriter, writeComment: (text: string, lineMap: number[], writer: EmitTextWriter, comment: CommentRange, newLine: string) => void, node: TextRange, newLine: string, removeComments: boolean): {
-        nodePos: number;
-        detachedCommentEndPos: number;
-    };
-    function writeCommentRange(text: string, lineMap: number[], writer: EmitTextWriter, comment: CommentRange, newLine: string): void;
-    function modifierToFlag(token: SyntaxKind): NodeFlags;
-    function isLeftHandSideExpression(expr: Expression): boolean;
-    function isAssignmentOperator(token: SyntaxKind): boolean;
-    function isExpressionWithTypeArgumentsInClassExtendsClause(node: Node): boolean;
-    function isSupportedExpressionWithTypeArguments(node: ExpressionWithTypeArguments): boolean;
-    function isRightSideOfQualifiedNameOrPropertyAccess(node: Node): boolean;
-    function isEmptyObjectLiteralOrArrayLiteral(expression: Node): boolean;
-    function getLocalSymbolForExportDefault(symbol: Symbol): Symbol;
-    function hasJavaScriptFileExtension(fileName: string): boolean;
-    const stringify: (value: any) => string;
-    function convertToBase64(input: string): string;
-    function convertToRelativePath(absoluteOrRelativePath: string, basePath: string, getCanonicalFileName: (path: string) => string): string;
-    function getNewLineCharacter(options: CompilerOptions): string;
-    function isWatchSet(options: CompilerOptions): boolean;
-}
-declare namespace ts {
-    function getDefaultLibFileName(options: CompilerOptions): string;
-    function textSpanEnd(span: TextSpan): number;
-    function textSpanIsEmpty(span: TextSpan): boolean;
-    function textSpanContainsPosition(span: TextSpan, position: number): boolean;
-    function textSpanContainsTextSpan(span: TextSpan, other: TextSpan): boolean;
-    function textSpanOverlapsWith(span: TextSpan, other: TextSpan): boolean;
-    function textSpanOverlap(span1: TextSpan, span2: TextSpan): TextSpan;
-    function textSpanIntersectsWithTextSpan(span: TextSpan, other: TextSpan): boolean;
-    function textSpanIntersectsWith(span: TextSpan, start: number, length: number): boolean;
-    function decodedTextSpanIntersectsWith(start1: number, length1: number, start2: number, length2: number): boolean;
-    function textSpanIntersectsWithPosition(span: TextSpan, position: number): boolean;
-    function textSpanIntersection(span1: TextSpan, span2: TextSpan): TextSpan;
-    function createTextSpan(start: number, length: number): TextSpan;
-    function createTextSpanFromBounds(start: number, end: number): TextSpan;
-    function textChangeRangeNewSpan(range: TextChangeRange): TextSpan;
-    function textChangeRangeIsUnchanged(range: TextChangeRange): boolean;
-    function createTextChangeRange(span: TextSpan, newLength: number): TextChangeRange;
-    let unchangedTextChangeRange: TextChangeRange;
-    function collapseTextChangeRangesAcrossMultipleVersions(changes: TextChangeRange[]): TextChangeRange;
-    function getTypeParameterOwner(d: Declaration): Declaration;
-    function isParameterPropertyDeclaration(node: ParameterDeclaration): boolean;
-    function startsWith(str: string, prefix: string): boolean;
-    function endsWith(str: string, suffix: string): boolean;
-}
-declare namespace ts {
-    let parseTime: number;
-    function createNode(kind: SyntaxKind, pos?: number, end?: number): Node;
-    function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodeArray?: (nodes: Node[]) => T): T;
-    function createSourceFile(fileName: string, sourceText: string, languageVersion: ScriptTarget, setParentNodes?: boolean, scriptKind?: ScriptKind): SourceFile;
-    function isExternalModule(file: SourceFile): boolean;
-    function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
-    function parseIsolatedJSDocComment(content: string, start?: number, length?: number): {
-        jsDocComment: JSDocComment;
-        diagnostics: Diagnostic[];
-    };
-    function parseJSDocTypeExpressionForTests(content: string, start?: number, length?: number): {
-        jsDocTypeExpression: JSDocTypeExpression;
-        diagnostics: Diagnostic[];
-    };
-}
-declare namespace ts {
-    let bindTime: number;
-    const enum ModuleInstanceState {
-        NonInstantiated = 0,
-        Instantiated = 1,
-        ConstEnumOnly = 2,
-    }
-    function getModuleInstanceState(node: Node): ModuleInstanceState;
-    function bindSourceFile(file: SourceFile, options: CompilerOptions): void;
-}
-declare namespace ts {
-    function getNodeId(node: Node): number;
-    let checkTime: number;
-    function getSymbolId(symbol: Symbol): number;
-    function createTypeChecker(host: TypeCheckerHost, produceDiagnostics: boolean): TypeChecker;
-}
-declare namespace ts {
-    interface SourceMapWriter {
-        getSourceMapData(): SourceMapData;
-        setSourceFile(sourceFile: SourceFile): void;
-        emitPos(pos: number): void;
-        emitStart(range: TextRange): void;
-        emitEnd(range: TextRange, stopOverridingSpan?: boolean): void;
-        changeEmitSourcePos(): void;
-        getText(): string;
-        getSourceMappingURL(): string;
-        initialize(filePath: string, sourceMapFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean): void;
-        reset(): void;
-    }
-    function getNullSourceMapWriter(): SourceMapWriter;
-    function createSourceMapWriter(host: EmitHost, writer: EmitTextWriter): SourceMapWriter;
-}
-declare namespace ts {
-    function getDeclarationDiagnostics(host: EmitHost, resolver: EmitResolver, targetSourceFile: SourceFile): Diagnostic[];
-    function writeDeclarationFile(declarationFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean, host: EmitHost, resolver: EmitResolver, emitterDiagnostics: DiagnosticCollection): boolean;
-}
-declare namespace ts {
-    function getResolvedExternalModuleName(host: EmitHost, file: SourceFile): string;
-    function getExternalModuleNameFromDeclaration(host: EmitHost, resolver: EmitResolver, declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration): string;
-    function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFile: SourceFile): EmitResult;
-}
-declare namespace ts {
-    let programTime: number;
-    let emitTime: number;
-    let ioReadTime: number;
-    let ioWriteTime: number;
-    const version: string;
-    function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean): string;
-    function resolveTripleslashReference(moduleName: string, containingFile: string): string;
-    function computeCommonSourceDirectoryOfFilenames(fileNames: string[], currentDirectory: string, getCanonicalFileName: (fileName: string) => string): string;
-    function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string, options: CompilerOptions, host: ModuleResolutionHost): ResolvedTypeReferenceDirectiveWithFailedLookupLocations;
-    function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-    function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-    function directoryProbablyExists(directoryName: string, host: {
-        directoryExists?: (directoryName: string) => boolean;
-    }): boolean;
-    function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-    const defaultInitCompilerOptions: CompilerOptions;
-    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
-    function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-    function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
-    function getDefaultTypeDirectiveNames(options: CompilerOptions, rootFiles: string[], host: CompilerHost): string[];
-    function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program;
-}
-declare namespace ts.BreakpointResolver {
-    function spanInSourceFileAtLocation(sourceFile: SourceFile, position: number): TextSpan;
-}
-declare namespace ts.OutliningElementsCollector {
-    function collectElements(sourceFile: SourceFile): OutliningSpan[];
-}
-declare namespace ts.NavigateTo {
-    function getNavigateToItems(program: Program, checker: TypeChecker, cancellationToken: CancellationToken, searchValue: string, maxResultCount: number): NavigateToItem[];
-}
-declare namespace ts.NavigationBar {
-    function getNavigationBarItems(sourceFile: SourceFile, compilerOptions: CompilerOptions): ts.NavigationBarItem[];
-    function getJsNavigationBarItems(sourceFile: SourceFile, compilerOptions: CompilerOptions): NavigationBarItem[];
-}
-declare namespace ts {
-    enum PatternMatchKind {
-        exact = 0,
-        prefix = 1,
-        substring = 2,
-        camelCase = 3,
-    }
-    interface PatternMatch {
-        kind: PatternMatchKind;
-        camelCaseWeight?: number;
-        isCaseSensitive: boolean;
-        punctuationStripped: boolean;
-    }
-    interface PatternMatcher {
-        getMatchesForLastSegmentOfPattern(candidate: string): PatternMatch[];
-        getMatches(candidateContainers: string[], candidate: string): PatternMatch[];
-        patternContainsDots: boolean;
-    }
-    function createPatternMatcher(pattern: string): PatternMatcher;
-    function breakIntoCharacterSpans(identifier: string): TextSpan[];
-    function breakIntoWordSpans(identifier: string): TextSpan[];
-}
-declare namespace ts.SignatureHelp {
-    function getSignatureHelpItems(program: Program, sourceFile: SourceFile, position: number, cancellationToken: CancellationToken): SignatureHelpItems;
-}
-declare namespace ts {
-    interface ListItemInfo {
-        listItemIndex: number;
-        list: Node;
-    }
-    function getLineStartPositionForPosition(position: number, sourceFile: SourceFile): number;
-    function rangeContainsRange(r1: TextRange, r2: TextRange): boolean;
-    function startEndContainsRange(start: number, end: number, range: TextRange): boolean;
-    function rangeContainsStartEnd(range: TextRange, start: number, end: number): boolean;
-    function rangeOverlapsWithStartEnd(r1: TextRange, start: number, end: number): boolean;
-    function startEndOverlapsWithStartEnd(start1: number, end1: number, start2: number, end2: number): boolean;
-    function positionBelongsToNode(candidate: Node, position: number, sourceFile: SourceFile): boolean;
-    function isCompletedNode(n: Node, sourceFile: SourceFile): boolean;
-    function findListItemInfo(node: Node): ListItemInfo;
-    function hasChildOfKind(n: Node, kind: SyntaxKind, sourceFile?: SourceFile): boolean;
-    function findChildOfKind(n: Node, kind: SyntaxKind, sourceFile?: SourceFile): Node;
-    function findContainingList(node: Node): Node;
-    function getTouchingWord(sourceFile: SourceFile, position: number): Node;
-    function getTouchingPropertyName(sourceFile: SourceFile, position: number): Node;
-    function getTouchingToken(sourceFile: SourceFile, position: number, includeItemAtEndPosition?: (n: Node) => boolean): Node;
-    function getTokenAtPosition(sourceFile: SourceFile, position: number): Node;
-    function findTokenOnLeftOfPosition(file: SourceFile, position: number): Node;
-    function findNextToken(previousToken: Node, parent: Node): Node;
-    function findPrecedingToken(position: number, sourceFile: SourceFile, startNode?: Node): Node;
-    function isInString(sourceFile: SourceFile, position: number): boolean;
-    function isInComment(sourceFile: SourceFile, position: number): boolean;
-    function isInsideJsxElementOrAttribute(sourceFile: SourceFile, position: number): boolean;
-    function isInTemplateString(sourceFile: SourceFile, position: number): boolean;
-    function isInCommentHelper(sourceFile: SourceFile, position: number, predicate?: (c: CommentRange) => boolean): boolean;
-    function hasDocComment(sourceFile: SourceFile, position: number): boolean;
-    function getJsDocTagAtPosition(sourceFile: SourceFile, position: number): JSDocTag;
-    function getNodeModifiers(node: Node): string;
-    function getTypeArgumentOrTypeParameterList(node: Node): NodeArray<Node>;
-    function isToken(n: Node): boolean;
-    function isWord(kind: SyntaxKind): boolean;
-    function isComment(kind: SyntaxKind): boolean;
-    function isStringOrRegularExpressionOrTemplateLiteral(kind: SyntaxKind): boolean;
-    function isPunctuation(kind: SyntaxKind): boolean;
-    function isInsideTemplateLiteral(node: LiteralExpression, position: number): boolean;
-    function isAccessibilityModifier(kind: SyntaxKind): boolean;
-    function compareDataObjects(dst: any, src: any): boolean;
-    function isArrayLiteralOrObjectLiteralDestructuringPattern(node: Node): boolean;
-}
-declare namespace ts {
-    function isFirstDeclarationOfSymbolParameter(symbol: Symbol): boolean;
-    function symbolPart(text: string, symbol: Symbol): SymbolDisplayPart;
-    function displayPart(text: string, kind: SymbolDisplayPartKind, symbol?: Symbol): SymbolDisplayPart;
-    function spacePart(): SymbolDisplayPart;
-    function keywordPart(kind: SyntaxKind): SymbolDisplayPart;
-    function punctuationPart(kind: SyntaxKind): SymbolDisplayPart;
-    function operatorPart(kind: SyntaxKind): SymbolDisplayPart;
-    function textOrKeywordPart(text: string): SymbolDisplayPart;
-    function textPart(text: string): SymbolDisplayPart;
-    function getNewLineOrDefaultFromHost(host: LanguageServiceHost | LanguageServiceShimHost): string;
-    function lineBreakPart(): SymbolDisplayPart;
-    function mapToDisplayParts(writeDisplayParts: (writer: DisplayPartsSymbolWriter) => void): SymbolDisplayPart[];
-    function typeToDisplayParts(typechecker: TypeChecker, type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): SymbolDisplayPart[];
-    function symbolToDisplayParts(typeChecker: TypeChecker, symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): SymbolDisplayPart[];
-    function signatureToDisplayParts(typechecker: TypeChecker, signature: Signature, enclosingDeclaration?: Node, flags?: TypeFormatFlags): SymbolDisplayPart[];
-    function getDeclaredName(typeChecker: TypeChecker, symbol: Symbol, location: Node): string;
-    function isImportOrExportSpecifierName(location: Node): boolean;
-    function stripQuotes(name: string): string;
-    function scriptKindIs(fileName: string, host: LanguageServiceHost, ...scriptKinds: ScriptKind[]): boolean;
-    function getScriptKind(fileName: string, host?: LanguageServiceHost): ScriptKind;
-}
-declare namespace ts.JsTyping {
-    interface TypingResolutionHost {
-        directoryExists: (path: string) => boolean;
-        fileExists: (fileName: string) => boolean;
-        readFile: (path: string, encoding?: string) => string;
-        readDirectory: (path: string, extension?: string, exclude?: string[], depth?: number) => string[];
-    }
-    function discoverTypings(host: TypingResolutionHost, fileNames: string[], projectRootPath: Path, safeListPath: Path, packageNameToTypingLocation: Map<string>, typingOptions: TypingOptions, compilerOptions: CompilerOptions): {
-        cachedTypingPaths: string[];
-        newTypingNames: string[];
-        filesToWatch: string[];
-    };
-}
-declare namespace ts.formatting {
-    interface FormattingScanner {
-        advance(): void;
-        isOnToken(): boolean;
-        readTokenInfo(n: Node): TokenInfo;
-        getCurrentLeadingTrivia(): TextRangeWithKind[];
-        lastTrailingTriviaWasNewLine(): boolean;
-        close(): void;
-    }
-    function getFormattingScanner(sourceFile: SourceFile, startPos: number, endPos: number): FormattingScanner;
-}
-declare namespace ts.formatting {
-    class FormattingContext {
-        sourceFile: SourceFile;
-        formattingRequestKind: FormattingRequestKind;
-        currentTokenSpan: TextRangeWithKind;
-        nextTokenSpan: TextRangeWithKind;
-        contextNode: Node;
-        currentTokenParent: Node;
-        nextTokenParent: Node;
-        private contextNodeAllOnSameLine;
-        private nextNodeAllOnSameLine;
-        private tokensAreOnSameLine;
-        private contextNodeBlockIsOnOneLine;
-        private nextNodeBlockIsOnOneLine;
-        constructor(sourceFile: SourceFile, formattingRequestKind: FormattingRequestKind);
-        updateContext(currentRange: TextRangeWithKind, currentTokenParent: Node, nextRange: TextRangeWithKind, nextTokenParent: Node, commonParent: Node): void;
-        ContextNodeAllOnSameLine(): boolean;
-        NextNodeAllOnSameLine(): boolean;
-        TokensAreOnSameLine(): boolean;
-        ContextNodeBlockIsOnOneLine(): boolean;
-        NextNodeBlockIsOnOneLine(): boolean;
-        private NodeIsOnOneLine(node);
-        private BlockIsOnOneLine(node);
-    }
-}
-declare namespace ts.formatting {
-    const enum FormattingRequestKind {
-        FormatDocument = 0,
-        FormatSelection = 1,
-        FormatOnEnter = 2,
-        FormatOnSemicolon = 3,
-        FormatOnClosingCurlyBrace = 4,
-    }
-}
-declare namespace ts.formatting {
-    class Rule {
-        Descriptor: RuleDescriptor;
-        Operation: RuleOperation;
-        Flag: RuleFlags;
-        constructor(Descriptor: RuleDescriptor, Operation: RuleOperation, Flag?: RuleFlags);
-        toString(): string;
-    }
-}
-declare namespace ts.formatting {
-    const enum RuleAction {
-        Ignore = 1,
-        Space = 2,
-        NewLine = 4,
-        Delete = 8,
-    }
-}
-declare namespace ts.formatting {
-    class RuleDescriptor {
-        LeftTokenRange: Shared.TokenRange;
-        RightTokenRange: Shared.TokenRange;
-        constructor(LeftTokenRange: Shared.TokenRange, RightTokenRange: Shared.TokenRange);
-        toString(): string;
-        static create1(left: SyntaxKind, right: SyntaxKind): RuleDescriptor;
-        static create2(left: Shared.TokenRange, right: SyntaxKind): RuleDescriptor;
-        static create3(left: SyntaxKind, right: Shared.TokenRange): RuleDescriptor;
-        static create4(left: Shared.TokenRange, right: Shared.TokenRange): RuleDescriptor;
-    }
-}
-declare namespace ts.formatting {
-    const enum RuleFlags {
-        None = 0,
-        CanDeleteNewLines = 1,
-    }
-}
-declare namespace ts.formatting {
-    class RuleOperation {
-        Context: RuleOperationContext;
-        Action: RuleAction;
-        constructor();
-        toString(): string;
-        static create1(action: RuleAction): RuleOperation;
-        static create2(context: RuleOperationContext, action: RuleAction): RuleOperation;
-    }
-}
-declare namespace ts.formatting {
-    class RuleOperationContext {
-        private customContextChecks;
-        constructor(...funcs: {
-            (context: FormattingContext): boolean;
-        }[]);
-        static Any: RuleOperationContext;
-        IsAny(): boolean;
-        InContext(context: FormattingContext): boolean;
-    }
-}
-declare namespace ts.formatting {
-    class Rules {
-        getRuleName(rule: Rule): string;
-        [name: string]: any;
-        IgnoreBeforeComment: Rule;
-        IgnoreAfterLineComment: Rule;
-        NoSpaceBeforeSemicolon: Rule;
-        NoSpaceBeforeColon: Rule;
-        NoSpaceBeforeQuestionMark: Rule;
-        SpaceAfterColon: Rule;
-        SpaceAfterQuestionMarkInConditionalOperator: Rule;
-        NoSpaceAfterQuestionMark: Rule;
-        SpaceAfterSemicolon: Rule;
-        SpaceAfterCloseBrace: Rule;
-        SpaceBetweenCloseBraceAndElse: Rule;
-        SpaceBetweenCloseBraceAndWhile: Rule;
-        NoSpaceAfterCloseBrace: Rule;
-        NoSpaceBeforeDot: Rule;
-        NoSpaceAfterDot: Rule;
-        NoSpaceBeforeOpenBracket: Rule;
-        NoSpaceAfterCloseBracket: Rule;
-        SpaceAfterOpenBrace: Rule;
-        SpaceBeforeCloseBrace: Rule;
-        NoSpaceBetweenEmptyBraceBrackets: Rule;
-        NewLineAfterOpenBraceInBlockContext: Rule;
-        NewLineBeforeCloseBraceInBlockContext: Rule;
-        NoSpaceAfterUnaryPrefixOperator: Rule;
-        NoSpaceAfterUnaryPreincrementOperator: Rule;
-        NoSpaceAfterUnaryPredecrementOperator: Rule;
-        NoSpaceBeforeUnaryPostincrementOperator: Rule;
-        NoSpaceBeforeUnaryPostdecrementOperator: Rule;
-        SpaceAfterPostincrementWhenFollowedByAdd: Rule;
-        SpaceAfterAddWhenFollowedByUnaryPlus: Rule;
-        SpaceAfterAddWhenFollowedByPreincrement: Rule;
-        SpaceAfterPostdecrementWhenFollowedBySubtract: Rule;
-        SpaceAfterSubtractWhenFollowedByUnaryMinus: Rule;
-        SpaceAfterSubtractWhenFollowedByPredecrement: Rule;
-        NoSpaceBeforeComma: Rule;
-        SpaceAfterCertainKeywords: Rule;
-        SpaceAfterLetConstInVariableDeclaration: Rule;
-        NoSpaceBeforeOpenParenInFuncCall: Rule;
-        SpaceAfterFunctionInFuncDecl: Rule;
-        NoSpaceBeforeOpenParenInFuncDecl: Rule;
-        SpaceAfterVoidOperator: Rule;
-        NoSpaceBetweenReturnAndSemicolon: Rule;
-        SpaceBetweenStatements: Rule;
-        SpaceAfterTryFinally: Rule;
-        SpaceAfterGetSetInMember: Rule;
-        SpaceBeforeBinaryKeywordOperator: Rule;
-        SpaceAfterBinaryKeywordOperator: Rule;
-        NoSpaceAfterConstructor: Rule;
-        NoSpaceAfterModuleImport: Rule;
-        SpaceAfterCertainTypeScriptKeywords: Rule;
-        SpaceBeforeCertainTypeScriptKeywords: Rule;
-        SpaceAfterModuleName: Rule;
-        SpaceBeforeArrow: Rule;
-        SpaceAfterArrow: Rule;
-        NoSpaceAfterEllipsis: Rule;
-        NoSpaceAfterOptionalParameters: Rule;
-        NoSpaceBeforeOpenAngularBracket: Rule;
-        NoSpaceBetweenCloseParenAndAngularBracket: Rule;
-        NoSpaceAfterOpenAngularBracket: Rule;
-        NoSpaceBeforeCloseAngularBracket: Rule;
-        NoSpaceAfterCloseAngularBracket: Rule;
-        NoSpaceAfterTypeAssertion: Rule;
-        NoSpaceBetweenEmptyInterfaceBraceBrackets: Rule;
-        HighPriorityCommonRules: Rule[];
-        LowPriorityCommonRules: Rule[];
-        SpaceAfterComma: Rule;
-        NoSpaceAfterComma: Rule;
-        SpaceBeforeBinaryOperator: Rule;
-        SpaceAfterBinaryOperator: Rule;
-        NoSpaceBeforeBinaryOperator: Rule;
-        NoSpaceAfterBinaryOperator: Rule;
-        SpaceAfterKeywordInControl: Rule;
-        NoSpaceAfterKeywordInControl: Rule;
-        FunctionOpenBraceLeftTokenRange: Shared.TokenRange;
-        SpaceBeforeOpenBraceInFunction: Rule;
-        NewLineBeforeOpenBraceInFunction: Rule;
-        TypeScriptOpenBraceLeftTokenRange: Shared.TokenRange;
-        SpaceBeforeOpenBraceInTypeScriptDeclWithBlock: Rule;
-        NewLineBeforeOpenBraceInTypeScriptDeclWithBlock: Rule;
-        ControlOpenBraceLeftTokenRange: Shared.TokenRange;
-        SpaceBeforeOpenBraceInControl: Rule;
-        NewLineBeforeOpenBraceInControl: Rule;
-        SpaceAfterSemicolonInFor: Rule;
-        NoSpaceAfterSemicolonInFor: Rule;
-        SpaceAfterOpenParen: Rule;
-        SpaceBeforeCloseParen: Rule;
-        NoSpaceBetweenParens: Rule;
-        NoSpaceAfterOpenParen: Rule;
-        NoSpaceBeforeCloseParen: Rule;
-        SpaceAfterOpenBracket: Rule;
-        SpaceBeforeCloseBracket: Rule;
-        NoSpaceBetweenBrackets: Rule;
-        NoSpaceAfterOpenBracket: Rule;
-        NoSpaceBeforeCloseBracket: Rule;
-        SpaceAfterAnonymousFunctionKeyword: Rule;
-        NoSpaceAfterAnonymousFunctionKeyword: Rule;
-        SpaceBeforeAt: Rule;
-        NoSpaceAfterAt: Rule;
-        SpaceAfterDecorator: Rule;
-        NoSpaceBetweenFunctionKeywordAndStar: Rule;
-        SpaceAfterStarInGeneratorDeclaration: Rule;
-        NoSpaceBetweenYieldKeywordAndStar: Rule;
-        SpaceBetweenYieldOrYieldStarAndOperand: Rule;
-        SpaceBetweenAsyncAndOpenParen: Rule;
-        SpaceBetweenAsyncAndFunctionKeyword: Rule;
-        NoSpaceBetweenTagAndTemplateString: Rule;
-        NoSpaceAfterTemplateHeadAndMiddle: Rule;
-        SpaceAfterTemplateHeadAndMiddle: Rule;
-        NoSpaceBeforeTemplateMiddleAndTail: Rule;
-        SpaceBeforeTemplateMiddleAndTail: Rule;
-        constructor();
-        static IsForContext(context: FormattingContext): boolean;
-        static IsNotForContext(context: FormattingContext): boolean;
-        static IsBinaryOpContext(context: FormattingContext): boolean;
-        static IsNotBinaryOpContext(context: FormattingContext): boolean;
-        static IsConditionalOperatorContext(context: FormattingContext): boolean;
-        static IsSameLineTokenOrBeforeMultilineBlockContext(context: FormattingContext): boolean;
-        static IsBeforeMultilineBlockContext(context: FormattingContext): boolean;
-        static IsMultilineBlockContext(context: FormattingContext): boolean;
-        static IsSingleLineBlockContext(context: FormattingContext): boolean;
-        static IsBlockContext(context: FormattingContext): boolean;
-        static IsBeforeBlockContext(context: FormattingContext): boolean;
-        static NodeIsBlockContext(node: Node): boolean;
-        static IsFunctionDeclContext(context: FormattingContext): boolean;
-        static IsFunctionDeclarationOrFunctionExpressionContext(context: FormattingContext): boolean;
-        static IsTypeScriptDeclWithBlockContext(context: FormattingContext): boolean;
-        static NodeIsTypeScriptDeclWithBlockContext(node: Node): boolean;
-        static IsAfterCodeBlockContext(context: FormattingContext): boolean;
-        static IsControlDeclContext(context: FormattingContext): boolean;
-        static IsObjectContext(context: FormattingContext): boolean;
-        static IsFunctionCallContext(context: FormattingContext): boolean;
-        static IsNewContext(context: FormattingContext): boolean;
-        static IsFunctionCallOrNewContext(context: FormattingContext): boolean;
-        static IsPreviousTokenNotComma(context: FormattingContext): boolean;
-        static IsNextTokenNotCloseBracket(context: FormattingContext): boolean;
-        static IsArrowFunctionContext(context: FormattingContext): boolean;
-        static IsNonJsxSameLineTokenContext(context: FormattingContext): boolean;
-        static IsNotBeforeBlockInFunctionDeclarationContext(context: FormattingContext): boolean;
-        static IsEndOfDecoratorContextOnSameLine(context: FormattingContext): boolean;
-        static NodeIsInDecoratorContext(node: Node): boolean;
-        static IsStartOfVariableDeclarationList(context: FormattingContext): boolean;
-        static IsNotFormatOnEnter(context: FormattingContext): boolean;
-        static IsModuleDeclContext(context: FormattingContext): boolean;
-        static IsObjectTypeContext(context: FormattingContext): boolean;
-        static IsTypeArgumentOrParameterOrAssertion(token: TextRangeWithKind, parent: Node): boolean;
-        static IsTypeArgumentOrParameterOrAssertionContext(context: FormattingContext): boolean;
-        static IsTypeAssertionContext(context: FormattingContext): boolean;
-        static IsVoidOpContext(context: FormattingContext): boolean;
-        static IsYieldOrYieldStarWithOperand(context: FormattingContext): boolean;
-    }
-}
-declare namespace ts.formatting {
-    class RulesMap {
-        map: RulesBucket[];
-        mapRowLength: number;
-        constructor();
-        static create(rules: Rule[]): RulesMap;
-        Initialize(rules: Rule[]): RulesBucket[];
-        FillRules(rules: Rule[], rulesBucketConstructionStateList: RulesBucketConstructionState[]): void;
-        private GetRuleBucketIndex(row, column);
-        private FillRule(rule, rulesBucketConstructionStateList);
-        GetRule(context: FormattingContext): Rule;
-    }
-    enum RulesPosition {
-        IgnoreRulesSpecific = 0,
-        IgnoreRulesAny,
-        ContextRulesSpecific,
-        ContextRulesAny,
-        NoContextRulesSpecific,
-        NoContextRulesAny,
-    }
-    class RulesBucketConstructionState {
-        private rulesInsertionIndexBitmap;
-        constructor();
-        GetInsertionIndex(maskPosition: RulesPosition): number;
-        IncreaseInsertionIndex(maskPosition: RulesPosition): void;
-    }
-    class RulesBucket {
-        private rules;
-        constructor();
-        Rules(): Rule[];
-        AddRule(rule: Rule, specificTokens: boolean, constructionState: RulesBucketConstructionState[], rulesBucketIndex: number): void;
-    }
-}
-declare namespace ts.formatting {
-    namespace Shared {
-        interface ITokenAccess {
-            GetTokens(): SyntaxKind[];
-            Contains(token: SyntaxKind): boolean;
-        }
-        class TokenRangeAccess implements ITokenAccess {
-            private tokens;
-            constructor(from: SyntaxKind, to: SyntaxKind, except: SyntaxKind[]);
-            GetTokens(): SyntaxKind[];
-            Contains(token: SyntaxKind): boolean;
-        }
-        class TokenValuesAccess implements ITokenAccess {
-            private tokens;
-            constructor(tks: SyntaxKind[]);
-            GetTokens(): SyntaxKind[];
-            Contains(token: SyntaxKind): boolean;
-        }
-        class TokenSingleValueAccess implements ITokenAccess {
-            token: SyntaxKind;
-            constructor(token: SyntaxKind);
-            GetTokens(): SyntaxKind[];
-            Contains(tokenValue: SyntaxKind): boolean;
-        }
-        class TokenAllAccess implements ITokenAccess {
-            GetTokens(): SyntaxKind[];
-            Contains(tokenValue: SyntaxKind): boolean;
-            toString(): string;
-        }
-        class TokenRange {
-            tokenAccess: ITokenAccess;
-            constructor(tokenAccess: ITokenAccess);
-            static FromToken(token: SyntaxKind): TokenRange;
-            static FromTokens(tokens: SyntaxKind[]): TokenRange;
-            static FromRange(f: SyntaxKind, to: SyntaxKind, except?: SyntaxKind[]): TokenRange;
-            static AllTokens(): TokenRange;
-            GetTokens(): SyntaxKind[];
-            Contains(token: SyntaxKind): boolean;
-            toString(): string;
-            static Any: TokenRange;
-            static AnyIncludingMultilineComments: TokenRange;
-            static Keywords: TokenRange;
-            static BinaryOperators: TokenRange;
-            static BinaryKeywordOperators: TokenRange;
-            static UnaryPrefixOperators: TokenRange;
-            static UnaryPrefixExpressions: TokenRange;
-            static UnaryPreincrementExpressions: TokenRange;
-            static UnaryPostincrementExpressions: TokenRange;
-            static UnaryPredecrementExpressions: TokenRange;
-            static UnaryPostdecrementExpressions: TokenRange;
-            static Comments: TokenRange;
-            static TypeNames: TokenRange;
-        }
-    }
-}
-declare namespace ts.formatting {
-    class RulesProvider {
-        private globalRules;
-        private options;
-        private activeRules;
-        private rulesMap;
-        constructor();
-        getRuleName(rule: Rule): string;
-        getRuleByName(name: string): Rule;
-        getRulesMap(): RulesMap;
-        ensureUpToDate(options: ts.FormatCodeOptions): void;
-        private createActiveRules(options);
-    }
-}
-declare namespace ts.formatting {
-    interface TextRangeWithKind extends TextRange {
-        kind: SyntaxKind;
-    }
-    interface TokenInfo {
-        leadingTrivia: TextRangeWithKind[];
-        token: TextRangeWithKind;
-        trailingTrivia: TextRangeWithKind[];
-    }
-    function formatOnEnter(position: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeOptions): TextChange[];
-    function formatOnSemicolon(position: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeOptions): TextChange[];
-    function formatOnClosingCurly(position: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeOptions): TextChange[];
-    function formatDocument(sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeOptions): TextChange[];
-    function formatSelection(start: number, end: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeOptions): TextChange[];
-    function getIndentationString(indentation: number, options: FormatCodeOptions): string;
-}
-declare namespace ts.formatting {
-    namespace SmartIndenter {
-        function getIndentation(position: number, sourceFile: SourceFile, options: EditorOptions): number;
-        function getIndentationForNode(n: Node, ignoreActualIndentationRange: TextRange, sourceFile: SourceFile, options: FormatCodeOptions): number;
-        function childStartsOnTheSameLineWithElseInIfStatement(parent: Node, child: TextRangeWithKind, childStartLine: number, sourceFile: SourceFile): boolean;
-        function findFirstNonWhitespaceCharacterAndColumn(startPos: number, endPos: number, sourceFile: SourceFile, options: EditorOptions): {
-            column: number;
-            character: number;
-        };
-        function findFirstNonWhitespaceColumn(startPos: number, endPos: number, sourceFile: SourceFile, options: EditorOptions): number;
-        function nodeWillIndentChild(parent: TextRangeWithKind, child: TextRangeWithKind, indentByDefault: boolean): boolean;
-        function shouldIndentChildNode(parent: TextRangeWithKind, child?: TextRangeWithKind): boolean;
-    }
-}
-declare namespace ts {
-    const servicesVersion: string;
-    interface Node {
-        getSourceFile(): SourceFile;
-        getChildCount(sourceFile?: SourceFile): number;
-        getChildAt(index: number, sourceFile?: SourceFile): Node;
-        getChildren(sourceFile?: SourceFile): Node[];
-        getStart(sourceFile?: SourceFile): number;
-        getFullStart(): number;
-        getEnd(): number;
-        getWidth(sourceFile?: SourceFile): number;
-        getFullWidth(): number;
-        getLeadingTriviaWidth(sourceFile?: SourceFile): number;
-        getFullText(sourceFile?: SourceFile): string;
-        getText(sourceFile?: SourceFile): string;
-        getFirstToken(sourceFile?: SourceFile): Node;
-        getLastToken(sourceFile?: SourceFile): Node;
-    }
-    interface Symbol {
-        getFlags(): SymbolFlags;
-        getName(): string;
-        getDeclarations(): Declaration[];
-        getDocumentationComment(): SymbolDisplayPart[];
-    }
-    interface Type {
-        getFlags(): TypeFlags;
-        getSymbol(): Symbol;
-        getProperties(): Symbol[];
-        getProperty(propertyName: string): Symbol;
-        getApparentProperties(): Symbol[];
-        getCallSignatures(): Signature[];
-        getConstructSignatures(): Signature[];
-        getStringIndexType(): Type;
-        getNumberIndexType(): Type;
-        getBaseTypes(): ObjectType[];
-        getNonNullableType(): Type;
-    }
-    interface Signature {
-        getDeclaration(): SignatureDeclaration;
-        getTypeParameters(): Type[];
-        getParameters(): Symbol[];
-        getReturnType(): Type;
-        getDocumentationComment(): SymbolDisplayPart[];
-    }
-    interface SourceFile {
-        version: string;
-        scriptSnapshot: IScriptSnapshot;
-        nameTable: Map<number>;
-        getNamedDeclarations(): Map<Declaration[]>;
-        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
-        getLineStarts(): number[];
-        getPositionOfLineAndCharacter(line: number, character: number): number;
-        update(newText: string, textChangeRange: TextChangeRange): SourceFile;
-    }
-    interface IScriptSnapshot {
-        getText(start: number, end: number): string;
-        getLength(): number;
-        getChangeRange(oldSnapshot: IScriptSnapshot): TextChangeRange;
-        dispose?(): void;
-    }
-    namespace ScriptSnapshot {
-        function fromString(text: string): IScriptSnapshot;
-    }
-    interface PreProcessedFileInfo {
-        referencedFiles: FileReference[];
-        typeReferenceDirectives: FileReference[];
-        importedFiles: FileReference[];
-        ambientExternalModules: string[];
-        isLibFile: boolean;
-    }
-    interface HostCancellationToken {
-        isCancellationRequested(): boolean;
-    }
-    interface LanguageServiceHost {
-        getCompilationSettings(): CompilerOptions;
-        getNewLine?(): string;
-        getProjectVersion?(): string;
-        getScriptFileNames(): string[];
-        getScriptKind?(fileName: string): ScriptKind;
-        getScriptVersion(fileName: string): string;
-        getScriptSnapshot(fileName: string): IScriptSnapshot | undefined;
-        getLocalizedDiagnosticMessages?(): any;
-        getCancellationToken?(): HostCancellationToken;
-        getCurrentDirectory(): string;
-        getDefaultLibFileName(options: CompilerOptions): string;
-        log?(s: string): void;
-        trace?(s: string): void;
-        error?(s: string): void;
-        useCaseSensitiveFileNames?(): boolean;
-        resolveModuleNames?(moduleNames: string[], containingFile: string): ResolvedModule[];
-        resolveTypeReferenceDirectives?(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
-        directoryExists?(directoryName: string): boolean;
-    }
-    interface LanguageService {
-        cleanupSemanticCache(): void;
-        getSyntacticDiagnostics(fileName: string): Diagnostic[];
-        getSemanticDiagnostics(fileName: string): Diagnostic[];
-        getCompilerOptionsDiagnostics(): Diagnostic[];
-        getSyntacticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[];
-        getSemanticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[];
-        getEncodedSyntacticClassifications(fileName: string, span: TextSpan): Classifications;
-        getEncodedSemanticClassifications(fileName: string, span: TextSpan): Classifications;
-        getCompletionsAtPosition(fileName: string, position: number): CompletionInfo;
-        getCompletionEntryDetails(fileName: string, position: number, entryName: string): CompletionEntryDetails;
-        getQuickInfoAtPosition(fileName: string, position: number): QuickInfo;
-        getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): TextSpan;
-        getBreakpointStatementAtPosition(fileName: string, position: number): TextSpan;
-        getSignatureHelpItems(fileName: string, position: number): SignatureHelpItems;
-        getRenameInfo(fileName: string, position: number): RenameInfo;
-        findRenameLocations(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): RenameLocation[];
-        getDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[];
-        getTypeDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[];
-        getReferencesAtPosition(fileName: string, position: number): ReferenceEntry[];
-        findReferences(fileName: string, position: number): ReferencedSymbol[];
-        getDocumentHighlights(fileName: string, position: number, filesToSearch: string[]): DocumentHighlights[];
-        getOccurrencesAtPosition(fileName: string, position: number): ReferenceEntry[];
-        getNavigateToItems(searchValue: string, maxResultCount?: number): NavigateToItem[];
-        getNavigationBarItems(fileName: string): NavigationBarItem[];
-        getOutliningSpans(fileName: string): OutliningSpan[];
-        getTodoComments(fileName: string, descriptors: TodoCommentDescriptor[]): TodoComment[];
-        getBraceMatchingAtPosition(fileName: string, position: number): TextSpan[];
-        getIndentationAtPosition(fileName: string, position: number, options: EditorOptions): number;
-        getFormattingEditsForRange(fileName: string, start: number, end: number, options: FormatCodeOptions): TextChange[];
-        getFormattingEditsForDocument(fileName: string, options: FormatCodeOptions): TextChange[];
-        getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: FormatCodeOptions): TextChange[];
-        getDocCommentTemplateAtPosition(fileName: string, position: number): TextInsertion;
-        isValidBraceCompletionAtPostion(fileName: string, position: number, openingBrace: number): boolean;
-        getEmitOutput(fileName: string): EmitOutput;
-        getProgram(): Program;
-        getNonBoundSourceFile(fileName: string): SourceFile;
-        dispose(): void;
-    }
-    interface Classifications {
-        spans: number[];
-        endOfLineState: EndOfLineState;
-    }
-    interface ClassifiedSpan {
-        textSpan: TextSpan;
-        classificationType: string;
-    }
-    interface NavigationBarItem {
-        text: string;
-        kind: string;
-        kindModifiers: string;
-        spans: TextSpan[];
-        childItems: NavigationBarItem[];
-        indent: number;
-        bolded: boolean;
-        grayed: boolean;
-    }
-    interface TodoCommentDescriptor {
-        text: string;
-        priority: number;
-    }
-    interface TodoComment {
-        descriptor: TodoCommentDescriptor;
-        message: string;
-        position: number;
-    }
-    class TextChange {
-        span: TextSpan;
-        newText: string;
-    }
-    interface TextInsertion {
-        newText: string;
-        caretOffset: number;
-    }
-    interface RenameLocation {
-        textSpan: TextSpan;
-        fileName: string;
-    }
-    interface ReferenceEntry {
-        textSpan: TextSpan;
-        fileName: string;
-        isWriteAccess: boolean;
-    }
-    interface DocumentHighlights {
-        fileName: string;
-        highlightSpans: HighlightSpan[];
-    }
-    namespace HighlightSpanKind {
-        const none: string;
-        const definition: string;
-        const reference: string;
-        const writtenReference: string;
-    }
-    interface HighlightSpan {
-        fileName?: string;
-        textSpan: TextSpan;
-        kind: string;
-    }
-    interface NavigateToItem {
-        name: string;
-        kind: string;
-        kindModifiers: string;
-        matchKind: string;
-        isCaseSensitive: boolean;
-        fileName: string;
-        textSpan: TextSpan;
-        containerName: string;
-        containerKind: string;
-    }
-    interface EditorOptions {
-        IndentSize: number;
-        TabSize: number;
-        NewLineCharacter: string;
-        ConvertTabsToSpaces: boolean;
-        IndentStyle: IndentStyle;
-    }
-    enum IndentStyle {
-        None = 0,
-        Block = 1,
-        Smart = 2,
-    }
-    interface FormatCodeOptions extends EditorOptions {
-        InsertSpaceAfterCommaDelimiter: boolean;
-        InsertSpaceAfterSemicolonInForStatements: boolean;
-        InsertSpaceBeforeAndAfterBinaryOperators: boolean;
-        InsertSpaceAfterKeywordsInControlFlowStatements: boolean;
-        InsertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
-        InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
-        InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: boolean;
-        InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
-        PlaceOpenBraceOnNewLineForFunctions: boolean;
-        PlaceOpenBraceOnNewLineForControlBlocks: boolean;
-        [s: string]: boolean | number | string;
-    }
-    interface DefinitionInfo {
-        fileName: string;
-        textSpan: TextSpan;
-        kind: string;
-        name: string;
-        containerKind: string;
-        containerName: string;
-    }
-    interface ReferencedSymbol {
-        definition: DefinitionInfo;
-        references: ReferenceEntry[];
-    }
-    enum SymbolDisplayPartKind {
-        aliasName = 0,
-        className = 1,
-        enumName = 2,
-        fieldName = 3,
-        interfaceName = 4,
-        keyword = 5,
-        lineBreak = 6,
-        numericLiteral = 7,
-        stringLiteral = 8,
-        localName = 9,
-        methodName = 10,
-        moduleName = 11,
-        operator = 12,
-        parameterName = 13,
-        propertyName = 14,
-        punctuation = 15,
-        space = 16,
-        text = 17,
-        typeParameterName = 18,
-        enumMemberName = 19,
-        functionName = 20,
-        regularExpressionLiteral = 21,
-    }
-    interface SymbolDisplayPart {
-        text: string;
-        kind: string;
-    }
-    interface QuickInfo {
-        kind: string;
-        kindModifiers: string;
-        textSpan: TextSpan;
-        displayParts: SymbolDisplayPart[];
-        documentation: SymbolDisplayPart[];
-    }
-    interface RenameInfo {
-        canRename: boolean;
-        localizedErrorMessage: string;
-        displayName: string;
-        fullDisplayName: string;
-        kind: string;
-        kindModifiers: string;
-        triggerSpan: TextSpan;
-    }
-    interface SignatureHelpParameter {
-        name: string;
-        documentation: SymbolDisplayPart[];
-        displayParts: SymbolDisplayPart[];
-        isOptional: boolean;
-    }
-    interface SignatureHelpItem {
-        isVariadic: boolean;
-        prefixDisplayParts: SymbolDisplayPart[];
-        suffixDisplayParts: SymbolDisplayPart[];
-        separatorDisplayParts: SymbolDisplayPart[];
-        parameters: SignatureHelpParameter[];
-        documentation: SymbolDisplayPart[];
-    }
-    interface SignatureHelpItems {
-        items: SignatureHelpItem[];
-        applicableSpan: TextSpan;
-        selectedItemIndex: number;
-        argumentIndex: number;
-        argumentCount: number;
-    }
-    interface CompletionInfo {
-        isMemberCompletion: boolean;
-        isNewIdentifierLocation: boolean;
-        entries: CompletionEntry[];
-    }
-    interface CompletionEntry {
-        name: string;
-        kind: string;
-        kindModifiers: string;
-        sortText: string;
-    }
-    interface CompletionEntryDetails {
-        name: string;
-        kind: string;
-        kindModifiers: string;
-        displayParts: SymbolDisplayPart[];
-        documentation: SymbolDisplayPart[];
-    }
-    interface OutliningSpan {
-        textSpan: TextSpan;
-        hintSpan: TextSpan;
-        bannerText: string;
-        autoCollapse: boolean;
-    }
-    interface EmitOutput {
-        outputFiles: OutputFile[];
-        emitSkipped: boolean;
-    }
-    const enum OutputFileType {
-        JavaScript = 0,
-        SourceMap = 1,
-        Declaration = 2,
-    }
-    interface OutputFile {
-        name: string;
-        writeByteOrderMark: boolean;
-        text: string;
-    }
-    const enum EndOfLineState {
-        None = 0,
-        InMultiLineCommentTrivia = 1,
-        InSingleQuoteStringLiteral = 2,
-        InDoubleQuoteStringLiteral = 3,
-        InTemplateHeadOrNoSubstitutionTemplate = 4,
-        InTemplateMiddleOrTail = 5,
-        InTemplateSubstitutionPosition = 6,
-    }
-    enum TokenClass {
-        Punctuation = 0,
-        Keyword = 1,
-        Operator = 2,
-        Comment = 3,
-        Whitespace = 4,
-        Identifier = 5,
-        NumberLiteral = 6,
-        StringLiteral = 7,
-        RegExpLiteral = 8,
-    }
-    interface ClassificationResult {
-        finalLexState: EndOfLineState;
-        entries: ClassificationInfo[];
-    }
-    interface ClassificationInfo {
-        length: number;
-        classification: TokenClass;
-    }
-    interface Classifier {
-        getClassificationsForLine(text: string, lexState: EndOfLineState, syntacticClassifierAbsent: boolean): ClassificationResult;
-        getEncodedLexicalClassifications(text: string, endOfLineState: EndOfLineState, syntacticClassifierAbsent: boolean): Classifications;
-    }
-    interface DocumentRegistry {
-        acquireDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
-        acquireDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
-        updateDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
-        updateDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
-        getKeyForCompilationSettings(settings: CompilerOptions): DocumentRegistryBucketKey;
-        releaseDocument(fileName: string, compilationSettings: CompilerOptions): void;
-        releaseDocumentWithKey(path: Path, key: DocumentRegistryBucketKey): void;
-        reportStats(): string;
-    }
-    type DocumentRegistryBucketKey = string & {
-        __bucketKey: any;
-    };
-    namespace ScriptElementKind {
-        const unknown: string;
-        const warning: string;
-        const keyword: string;
-        const scriptElement: string;
-        const moduleElement: string;
-        const classElement: string;
-        const localClassElement: string;
-        const interfaceElement: string;
-        const typeElement: string;
-        const enumElement: string;
-        const variableElement: string;
-        const localVariableElement: string;
-        const functionElement: string;
-        const localFunctionElement: string;
-        const memberFunctionElement: string;
-        const memberGetAccessorElement: string;
-        const memberSetAccessorElement: string;
-        const memberVariableElement: string;
-        const constructorImplementationElement: string;
-        const callSignatureElement: string;
-        const indexSignatureElement: string;
-        const constructSignatureElement: string;
-        const parameterElement: string;
-        const typeParameterElement: string;
-        const primitiveType: string;
-        const label: string;
-        const alias: string;
-        const constElement: string;
-        const letElement: string;
-    }
-    namespace ScriptElementKindModifier {
-        const none: string;
-        const publicMemberModifier: string;
-        const privateMemberModifier: string;
-        const protectedMemberModifier: string;
-        const exportedModifier: string;
-        const ambientModifier: string;
-        const staticModifier: string;
-        const abstractModifier: string;
-    }
-    class ClassificationTypeNames {
-        static comment: string;
-        static identifier: string;
-        static keyword: string;
-        static numericLiteral: string;
-        static operator: string;
-        static stringLiteral: string;
-        static whiteSpace: string;
-        static text: string;
-        static punctuation: string;
-        static className: string;
-        static enumName: string;
-        static interfaceName: string;
-        static moduleName: string;
-        static typeParameterName: string;
-        static typeAliasName: string;
-        static parameterName: string;
-        static docCommentTagName: string;
-        static jsxOpenTagName: string;
-        static jsxCloseTagName: string;
-        static jsxSelfClosingTagName: string;
-        static jsxAttribute: string;
-        static jsxText: string;
-        static jsxAttributeStringLiteralValue: string;
-    }
-    const enum ClassificationType {
-        comment = 1,
-        identifier = 2,
-        keyword = 3,
-        numericLiteral = 4,
-        operator = 5,
-        stringLiteral = 6,
-        regularExpressionLiteral = 7,
-        whiteSpace = 8,
-        text = 9,
-        punctuation = 10,
-        className = 11,
-        enumName = 12,
-        interfaceName = 13,
-        moduleName = 14,
-        typeParameterName = 15,
-        typeAliasName = 16,
-        parameterName = 17,
-        docCommentTagName = 18,
-        jsxOpenTagName = 19,
-        jsxCloseTagName = 20,
-        jsxSelfClosingTagName = 21,
-        jsxAttribute = 22,
-        jsxText = 23,
-        jsxAttributeStringLiteralValue = 24,
-    }
-    interface DisplayPartsSymbolWriter extends SymbolWriter {
-        displayParts(): SymbolDisplayPart[];
-    }
-    function displayPartsToString(displayParts: SymbolDisplayPart[]): string;
-    function getDefaultCompilerOptions(): CompilerOptions;
-    interface TranspileOptions {
-        compilerOptions?: CompilerOptions;
-        fileName?: string;
-        reportDiagnostics?: boolean;
-        moduleName?: string;
-        renamedDependencies?: Map<string>;
-    }
-    interface TranspileOutput {
-        outputText: string;
-        diagnostics?: Diagnostic[];
-        sourceMapText?: string;
-    }
-    function transpileModule(input: string, transpileOptions: TranspileOptions): TranspileOutput;
-    function transpile(input: string, compilerOptions?: CompilerOptions, fileName?: string, diagnostics?: Diagnostic[], moduleName?: string): string;
-    function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTarget: ScriptTarget, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile;
-    let disableIncrementalParsing: boolean;
-    function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
-    function createDocumentRegistry(useCaseSensitiveFileNames?: boolean, currentDirectory?: string): DocumentRegistry;
-    function preProcessFile(sourceText: string, readImportFiles?: boolean, detectJavaScriptImports?: boolean): PreProcessedFileInfo;
-    function getContainerNode(node: Node): Declaration;
-    function getNodeKind(node: Node): string;
-    function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry): LanguageService;
-    function getNameTable(sourceFile: SourceFile): Map<number>;
-    function createClassifier(): Classifier;
-    function getDefaultLibFilePath(options: CompilerOptions): string;
-}
-declare namespace ts.server {
-    function generateSpaces(n: number): string;
-    function generateIndentString(n: number, editorOptions: EditorOptions): string;
-    interface PendingErrorCheck {
-        fileName: string;
-        project: Project;
-    }
-    namespace CommandNames {
-        const Brace: string;
-        const Change: string;
-        const Close: string;
-        const Completions: string;
-        const CompletionDetails: string;
-        const Configure: string;
-        const Definition: string;
-        const Exit: string;
-        const Format: string;
-        const Formatonkey: string;
-        const Geterr: string;
-        const GeterrForProject: string;
-        const NavBar: string;
-        const Navto: string;
-        const Occurrences: string;
-        const DocumentHighlights: string;
-        const Open: string;
-        const Quickinfo: string;
-        const References: string;
-        const Reload: string;
-        const Rename: string;
-        const Saveto: string;
-        const SignatureHelp: string;
-        const TypeDefinition: string;
-        const ProjectInfo: string;
-        const ReloadProjects: string;
-        const Unknown: string;
-    }
-    interface ServerHost extends ts.System {
-        setTimeout(callback: (...args: any[]) => void, ms: number, ...args: any[]): any;
-        clearTimeout(timeoutId: any): void;
-    }
-    class Session {
-        private host;
-        private byteLength;
-        private hrtime;
-        private logger;
-        protected projectService: ProjectService;
-        private errorTimer;
-        private immediateId;
-        private changeSeq;
-        constructor(host: ServerHost, byteLength: (buf: string, encoding?: string) => number, hrtime: (start?: number[]) => number[], logger: Logger);
-        private handleEvent(eventName, project, fileName);
-        logError(err: Error, cmd: string): void;
-        private sendLineToClient(line);
-        send(msg: protocol.Message): void;
-        configFileDiagnosticEvent(triggerFile: string, configFile: string, diagnostics: ts.Diagnostic[]): void;
-        event(info: any, eventName: string): void;
-        private response(info, cmdName, reqSeq?, errorMsg?);
-        output(body: any, commandName: string, requestSequence?: number, errorMessage?: string): void;
-        private semanticCheck(file, project);
-        private syntacticCheck(file, project);
-        private reloadProjects();
-        private updateProjectStructure(seq, matchSeq, ms?);
-        private updateErrorCheck(checkList, seq, matchSeq, ms?, followMs?, requireOpen?);
-        private getDefinition(line, offset, fileName);
-        private getTypeDefinition(line, offset, fileName);
-        private getOccurrences(line, offset, fileName);
-        private getDocumentHighlights(line, offset, fileName, filesToSearch);
-        private getProjectInfo(fileName, needFileNameList);
-        private getRenameLocations(line, offset, fileName, findInComments, findInStrings);
-        private getReferences(line, offset, fileName);
-        private openClientFile(fileName, fileContent?, scriptKind?);
-        private getQuickInfo(line, offset, fileName);
-        private getFormattingEditsForRange(line, offset, endLine, endOffset, fileName);
-        private getFormattingEditsAfterKeystroke(line, offset, key, fileName);
-        private getCompletions(line, offset, prefix, fileName);
-        private getCompletionEntryDetails(line, offset, entryNames, fileName);
-        private getSignatureHelpItems(line, offset, fileName);
-        private getDiagnostics(delay, fileNames);
-        private change(line, offset, endLine, endOffset, insertString, fileName);
-        private reload(fileName, tempFileName, reqSeq?);
-        private saveToTmp(fileName, tempFileName);
-        private closeClientFile(fileName);
-        private decorateNavigationBarItem(project, fileName, items);
-        private getNavigationBarItems(fileName);
-        private getNavigateToItems(searchValue, fileName, maxResultCount?);
-        private getBraceMatching(line, offset, fileName);
-        getDiagnosticsForProject(delay: number, fileName: string): void;
-        getCanonicalFileName(fileName: string): string;
-        exit(): void;
-        private handlers;
-        addProtocolHandler(command: string, handler: (request: protocol.Request) => {
-            response?: any;
-            responseRequired: boolean;
-        }): void;
-        executeCommand(request: protocol.Request): {
-            response?: any;
-            responseRequired?: boolean;
-        };
-        onMessage(message: string): void;
-    }
-}
-declare namespace ts.server {
-    interface Logger {
-        close(): void;
-        isVerbose(): boolean;
-        loggingEnabled(): boolean;
-        perftrc(s: string): void;
-        info(s: string): void;
-        startGroup(): void;
-        endGroup(): void;
-        msg(s: string, type?: string): void;
-    }
-    class ScriptInfo {
-        private host;
-        fileName: string;
-        content: string;
-        isOpen: boolean;
-        svc: ScriptVersionCache;
-        children: ScriptInfo[];
-        defaultProject: Project;
-        fileWatcher: FileWatcher;
-        formatCodeOptions: FormatCodeOptions;
-        path: Path;
-        scriptKind: ScriptKind;
-        constructor(host: ServerHost, fileName: string, content: string, isOpen?: boolean);
-        setFormatOptions(formatOptions: protocol.FormatOptions): void;
-        close(): void;
-        addChild(childInfo: ScriptInfo): void;
-        snap(): LineIndexSnapshot;
-        getText(): string;
-        getLineInfo(line: number): ILineInfo;
-        editContent(start: number, end: number, newText: string): void;
-        getTextChangeRangeBetweenVersions(startVersion: number, endVersion: number): ts.TextChangeRange;
-        getChangeRange(oldSnapshot: ts.IScriptSnapshot): ts.TextChangeRange;
-    }
-    class LSHost implements ts.LanguageServiceHost {
-        host: ServerHost;
-        project: Project;
-        ls: ts.LanguageService;
-        compilationSettings: ts.CompilerOptions;
-        filenameToScript: ts.FileMap<ScriptInfo>;
-        roots: ScriptInfo[];
-        private resolvedModuleNames;
-        private resolvedTypeReferenceDirectives;
-        private moduleResolutionHost;
-        private getCanonicalFileName;
-        constructor(host: ServerHost, project: Project);
-        private resolveNamesWithLocalCache<T, R>(names, containingFile, cache, loader, getResult);
-        resolveTypeReferenceDirectives(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
-        resolveModuleNames(moduleNames: string[], containingFile: string): ResolvedModule[];
-        getDefaultLibFileName(): string;
-        getScriptSnapshot(filename: string): ts.IScriptSnapshot;
-        setCompilationSettings(opt: ts.CompilerOptions): void;
-        lineAffectsRefs(filename: string, line: number): boolean;
-        getCompilationSettings(): CompilerOptions;
-        getScriptFileNames(): string[];
-        getScriptKind(fileName: string): ScriptKind;
-        getScriptVersion(filename: string): string;
-        getCurrentDirectory(): string;
-        getScriptIsOpen(filename: string): boolean;
-        removeReferencedFile(info: ScriptInfo): void;
-        getScriptInfo(filename: string): ScriptInfo;
-        addRoot(info: ScriptInfo): void;
-        removeRoot(info: ScriptInfo): void;
-        saveTo(filename: string, tmpfilename: string): void;
-        reloadScript(filename: string, tmpfilename: string, cb: () => any): void;
-        editScript(filename: string, start: number, end: number, newText: string): void;
-        resolvePath(path: string): string;
-        fileExists(path: string): boolean;
-        directoryExists(path: string): boolean;
-        lineToTextSpan(filename: string, line: number): ts.TextSpan;
-        lineOffsetToPosition(filename: string, line: number, offset: number): number;
-        positionToLineOffset(filename: string, position: number): ILineInfo;
-    }
-    interface ProjectOptions {
-        files?: string[];
-        compilerOptions?: ts.CompilerOptions;
-    }
-    class Project {
-        projectService: ProjectService;
-        projectOptions?: ProjectOptions;
-        compilerService: CompilerService;
-        projectFilename: string;
-        projectFileWatcher: FileWatcher;
-        directoryWatcher: FileWatcher;
-        directoriesWatchedForTsconfig: string[];
-        program: ts.Program;
-        filenameToSourceFile: ts.Map<ts.SourceFile>;
-        updateGraphSeq: number;
-        openRefCount: number;
-        constructor(projectService: ProjectService, projectOptions?: ProjectOptions);
-        addOpenRef(): void;
-        deleteOpenRef(): number;
-        openReferencedFile(filename: string): ScriptInfo;
-        getRootFiles(): string[];
-        getFileNames(): string[];
-        getSourceFile(info: ScriptInfo): SourceFile;
-        getSourceFileFromName(filename: string, requireOpen?: boolean): SourceFile;
-        isRoot(info: ScriptInfo): boolean;
-        removeReferencedFile(info: ScriptInfo): void;
-        updateFileMap(): void;
-        finishGraph(): void;
-        updateGraph(): void;
-        isConfiguredProject(): string;
-        addRoot(info: ScriptInfo): void;
-        removeRoot(info: ScriptInfo): void;
-        filesToString(): string;
-        setProjectOptions(projectOptions: ProjectOptions): void;
-    }
-    interface ProjectOpenResult {
-        success?: boolean;
-        errorMsg?: string;
-        project?: Project;
-    }
-    function combineProjectOutput<T>(projects: Project[], action: (project: Project) => T[], comparer?: (a: T, b: T) => number, areEqual?: (a: T, b: T) => boolean): T[];
-    interface ProjectServiceEventHandler {
-        (eventName: string, project: Project, fileName: string): void;
-    }
-    interface HostConfiguration {
-        formatCodeOptions: ts.FormatCodeOptions;
-        hostInfo: string;
-    }
-    class ProjectService {
-        host: ServerHost;
-        psLogger: Logger;
-        eventHandler?: ProjectServiceEventHandler;
-        filenameToScriptInfo: ts.Map<ScriptInfo>;
-        openFileRoots: ScriptInfo[];
-        inferredProjects: Project[];
-        configuredProjects: Project[];
-        openFilesReferenced: ScriptInfo[];
-        openFileRootsConfigured: ScriptInfo[];
-        directoryWatchersForTsconfig: ts.Map<FileWatcher>;
-        directoryWatchersRefCount: ts.Map<number>;
-        hostConfiguration: HostConfiguration;
-        timerForDetectingProjectFileListChanges: Map<any>;
-        constructor(host: ServerHost, psLogger: Logger, eventHandler?: ProjectServiceEventHandler);
-        addDefaultHostConfiguration(): void;
-        getFormatCodeOptions(file?: string): FormatCodeOptions;
-        watchedFileChanged(fileName: string): void;
-        directoryWatchedForSourceFilesChanged(project: Project, fileName: string): void;
-        startTimerForDetectingProjectFileListChanges(project: Project): void;
-        handleProjectFileListChanges(project: Project): void;
-        directoryWatchedForTsconfigChanged(fileName: string): void;
-        getCanonicalFileName(fileName: string): string;
-        watchedProjectConfigFileChanged(project: Project): void;
-        log(msg: string, type?: string): void;
-        setHostConfiguration(args: ts.server.protocol.ConfigureRequestArguments): void;
-        closeLog(): void;
-        createInferredProject(root: ScriptInfo): Project;
-        fileDeletedInFilesystem(info: ScriptInfo): void;
-        updateConfiguredProjectList(): void;
-        removeProject(project: Project): void;
-        setConfiguredProjectRoot(info: ScriptInfo): boolean;
-        addOpenFile(info: ScriptInfo): void;
-        closeOpenFile(info: ScriptInfo): void;
-        findReferencingProjects(info: ScriptInfo, excludedProject?: Project): Project[];
-        reloadProjects(): void;
-        updateProjectStructure(): void;
-        getScriptInfo(filename: string): ScriptInfo;
-        openFile(fileName: string, openedByClient: boolean, fileContent?: string, scriptKind?: ScriptKind): ScriptInfo;
-        findConfigFile(searchPath: string): string;
-        openClientFile(fileName: string, fileContent?: string, scriptKind?: ScriptKind): {
-            configFileName?: string;
-            configFileErrors?: Diagnostic[];
-        };
-        openOrUpdateConfiguredProjectForFile(fileName: string): {
-            configFileName?: string;
-            configFileErrors?: Diagnostic[];
-        };
-        closeClientFile(filename: string): void;
-        getProjectForFile(filename: string): Project;
-        printProjectsForFile(filename: string): void;
-        printProjects(): void;
-        configProjectIsActive(fileName: string): boolean;
-        findConfiguredProjectByConfigFile(configFileName: string): Project;
-        configFileToProjectOptions(configFilename: string): {
-            succeeded: boolean;
-            projectOptions?: ProjectOptions;
-            errors?: Diagnostic[];
-        };
-        openConfigFile(configFilename: string, clientFileName?: string): {
-            success: boolean;
-            project?: Project;
-            errors?: Diagnostic[];
-        };
-        updateConfiguredProject(project: Project): Diagnostic[];
-        createProject(projectFilename: string, projectOptions?: ProjectOptions): Project;
-    }
-    class CompilerService {
-        project: Project;
-        host: LSHost;
-        languageService: ts.LanguageService;
-        classifier: ts.Classifier;
-        settings: ts.CompilerOptions;
-        documentRegistry: DocumentRegistry;
-        constructor(project: Project, opt?: ts.CompilerOptions);
-        setCompilerOptions(opt: ts.CompilerOptions): void;
-        isExternalModule(filename: string): boolean;
-        static getDefaultFormatCodeOptions(host: ServerHost): ts.FormatCodeOptions;
-    }
-    interface LineCollection {
-        charCount(): number;
-        lineCount(): number;
-        isLeaf(): boolean;
-        walk(rangeStart: number, rangeLength: number, walkFns: ILineIndexWalker): void;
-    }
-    interface ILineInfo {
-        line: number;
-        offset: number;
-        text?: string;
-        leaf?: LineLeaf;
-    }
-    enum CharRangeSection {
-        PreStart = 0,
-        Start = 1,
-        Entire = 2,
-        Mid = 3,
-        End = 4,
-        PostEnd = 5,
-    }
-    interface ILineIndexWalker {
-        goSubtree: boolean;
-        done: boolean;
-        leaf(relativeStart: number, relativeLength: number, lineCollection: LineLeaf): void;
-        pre?(relativeStart: number, relativeLength: number, lineCollection: LineCollection, parent: LineNode, nodeType: CharRangeSection): LineCollection;
-        post?(relativeStart: number, relativeLength: number, lineCollection: LineCollection, parent: LineNode, nodeType: CharRangeSection): LineCollection;
-    }
-    class TextChange {
-        pos: number;
-        deleteLen: number;
-        insertedText?: string;
-        constructor(pos: number, deleteLen: number, insertedText?: string);
-        getTextChangeRange(): TextChangeRange;
-    }
-    class ScriptVersionCache {
-        changes: TextChange[];
-        versions: LineIndexSnapshot[];
-        minVersion: number;
-        private currentVersion;
-        private host;
-        static changeNumberThreshold: number;
-        static changeLengthThreshold: number;
-        static maxVersions: number;
-        edit(pos: number, deleteLen: number, insertedText?: string): void;
-        latest(): LineIndexSnapshot;
-        latestVersion(): number;
-        reloadFromFile(filename: string, cb?: () => any): void;
-        reload(script: string): void;
-        getSnapshot(): LineIndexSnapshot;
-        getTextChangesBetweenVersions(oldVersion: number, newVersion: number): TextChangeRange;
-        static fromString(host: ServerHost, script: string): ScriptVersionCache;
-    }
-    class LineIndexSnapshot implements ts.IScriptSnapshot {
-        version: number;
-        cache: ScriptVersionCache;
-        index: LineIndex;
-        changesSincePreviousVersion: TextChange[];
-        constructor(version: number, cache: ScriptVersionCache);
-        getText(rangeStart: number, rangeEnd: number): string;
-        getLength(): number;
-        getLineStartPositions(): number[];
-        getLineMapper(): (line: number) => number;
-        getTextChangeRangeSinceVersion(scriptVersion: number): TextChangeRange;
-        getChangeRange(oldSnapshot: ts.IScriptSnapshot): ts.TextChangeRange;
-    }
-    class LineIndex {
-        root: LineNode;
-        checkEdits: boolean;
-        charOffsetToLineNumberAndPos(charOffset: number): ILineInfo;
-        lineNumberToInfo(lineNumber: number): ILineInfo;
-        load(lines: string[]): void;
-        walk(rangeStart: number, rangeLength: number, walkFns: ILineIndexWalker): void;
-        getText(rangeStart: number, rangeLength: number): string;
-        getLength(): number;
-        every(f: (ll: LineLeaf, s: number, len: number) => boolean, rangeStart: number, rangeEnd?: number): boolean;
-        edit(pos: number, deleteLength: number, newText?: string): LineIndex;
-        static buildTreeFromBottom(nodes: LineCollection[]): LineNode;
-        static linesFromText(text: string): {
-            lines: string[];
-            lineMap: number[];
-        };
-    }
-    class LineNode implements LineCollection {
-        totalChars: number;
-        totalLines: number;
-        children: LineCollection[];
-        isLeaf(): boolean;
-        updateCounts(): void;
-        execWalk(rangeStart: number, rangeLength: number, walkFns: ILineIndexWalker, childIndex: number, nodeType: CharRangeSection): boolean;
-        skipChild(relativeStart: number, relativeLength: number, childIndex: number, walkFns: ILineIndexWalker, nodeType: CharRangeSection): void;
-        walk(rangeStart: number, rangeLength: number, walkFns: ILineIndexWalker): void;
-        charOffsetToLineNumberAndPos(lineNumber: number, charOffset: number): ILineInfo;
-        lineNumberToInfo(lineNumber: number, charOffset: number): ILineInfo;
-        childFromLineNumber(lineNumber: number, charOffset: number): {
-            child: LineCollection;
-            childIndex: number;
-            relativeLineNumber: number;
-            charOffset: number;
-        };
-        childFromCharOffset(lineNumber: number, charOffset: number): {
-            child: LineCollection;
-            childIndex: number;
-            charOffset: number;
-            lineNumber: number;
-        };
-        splitAfter(childIndex: number): LineNode;
-        remove(child: LineCollection): void;
-        findChildIndex(child: LineCollection): number;
-        insertAt(child: LineCollection, nodes: LineCollection[]): LineNode[];
-        add(collection: LineCollection): boolean;
-        charCount(): number;
-        lineCount(): number;
-    }
-    class LineLeaf implements LineCollection {
-        text: string;
-        udata: any;
-        constructor(text: string);
-        setUdata(data: any): void;
-        getUdata(): any;
-        isLeaf(): boolean;
-        walk(rangeStart: number, rangeLength: number, walkFns: ILineIndexWalker): void;
-        charCount(): number;
-        lineCount(): number;
-    }
-}
-declare let debugObjectHost: any;
-declare namespace ts {
-    interface ScriptSnapshotShim {
-        getText(start: number, end: number): string;
-        getLength(): number;
-        getChangeRange(oldSnapshot: ScriptSnapshotShim): string;
-        dispose?(): void;
-    }
-    interface Logger {
-        log(s: string): void;
-        trace(s: string): void;
-        error(s: string): void;
-    }
-    interface LanguageServiceShimHost extends Logger {
-        getCompilationSettings(): string;
-        getScriptFileNames(): string;
-        getScriptKind?(fileName: string): ScriptKind;
-        getScriptVersion(fileName: string): string;
-        getScriptSnapshot(fileName: string): ScriptSnapshotShim;
-        getLocalizedDiagnosticMessages(): string;
-        getCancellationToken(): HostCancellationToken;
-        getCurrentDirectory(): string;
-        getDirectories(path: string): string[];
-        getDefaultLibFileName(options: string): string;
-        getNewLine?(): string;
-        getProjectVersion?(): string;
-        useCaseSensitiveFileNames?(): boolean;
-        getModuleResolutionsForFile?(fileName: string): string;
-        getTypeReferenceDirectiveResolutionsForFile?(fileName: string): string;
-        directoryExists(directoryName: string): boolean;
-    }
-    interface CoreServicesShimHost extends Logger, ModuleResolutionHost {
-        readDirectory(rootDir: string, extension: string, exclude?: string, depth?: number): string;
-        trace(s: string): void;
-    }
-    interface IFileReference {
-        path: string;
-        position: number;
-        length: number;
-    }
-    interface ShimFactory {
-        registerShim(shim: Shim): void;
-        unregisterShim(shim: Shim): void;
-    }
-    interface Shim {
-        dispose(dummy: any): void;
-    }
-    interface LanguageServiceShim extends Shim {
-        languageService: LanguageService;
-        dispose(dummy: any): void;
-        refresh(throwOnError: boolean): void;
-        cleanupSemanticCache(): void;
-        getSyntacticDiagnostics(fileName: string): string;
-        getSemanticDiagnostics(fileName: string): string;
-        getCompilerOptionsDiagnostics(): string;
-        getSyntacticClassifications(fileName: string, start: number, length: number): string;
-        getSemanticClassifications(fileName: string, start: number, length: number): string;
-        getEncodedSyntacticClassifications(fileName: string, start: number, length: number): string;
-        getEncodedSemanticClassifications(fileName: string, start: number, length: number): string;
-        getCompletionsAtPosition(fileName: string, position: number): string;
-        getCompletionEntryDetails(fileName: string, position: number, entryName: string): string;
-        getQuickInfoAtPosition(fileName: string, position: number): string;
-        getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): string;
-        getBreakpointStatementAtPosition(fileName: string, position: number): string;
-        getSignatureHelpItems(fileName: string, position: number): string;
-        getRenameInfo(fileName: string, position: number): string;
-        findRenameLocations(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): string;
-        getDefinitionAtPosition(fileName: string, position: number): string;
-        getTypeDefinitionAtPosition(fileName: string, position: number): string;
-        getReferencesAtPosition(fileName: string, position: number): string;
-        findReferences(fileName: string, position: number): string;
-        getOccurrencesAtPosition(fileName: string, position: number): string;
-        getDocumentHighlights(fileName: string, position: number, filesToSearch: string): string;
-        getNavigateToItems(searchValue: string, maxResultCount?: number): string;
-        getNavigationBarItems(fileName: string): string;
-        getOutliningSpans(fileName: string): string;
-        getTodoComments(fileName: string, todoCommentDescriptors: string): string;
-        getBraceMatchingAtPosition(fileName: string, position: number): string;
-        getIndentationAtPosition(fileName: string, position: number, options: string): string;
-        getFormattingEditsForRange(fileName: string, start: number, end: number, options: string): string;
-        getFormattingEditsForDocument(fileName: string, options: string): string;
-        getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: string): string;
-        getDocCommentTemplateAtPosition(fileName: string, position: number): string;
-        isValidBraceCompletionAtPostion(fileName: string, position: number, openingBrace: number): string;
-        getEmitOutput(fileName: string): string;
-    }
-    interface ClassifierShim extends Shim {
-        getEncodedLexicalClassifications(text: string, lexState: EndOfLineState, syntacticClassifierAbsent?: boolean): string;
-        getClassificationsForLine(text: string, lexState: EndOfLineState, syntacticClassifierAbsent?: boolean): string;
-    }
-    interface CoreServicesShim extends Shim {
-        getPreProcessedFileInfo(fileName: string, sourceText: IScriptSnapshot): string;
-        getTSConfigFileInfo(fileName: string, sourceText: IScriptSnapshot): string;
-        getDefaultCompilationSettings(): string;
-        discoverTypings(discoverTypingsJson: string): string;
-    }
-    class LanguageServiceShimHostAdapter implements LanguageServiceHost {
-        private shimHost;
-        private files;
-        private loggingEnabled;
-        private tracingEnabled;
-        resolveModuleNames: (moduleName: string[], containingFile: string) => ResolvedModule[];
-        resolveTypeReferenceDirectives: (typeDirectiveNames: string[], containingFile: string) => ResolvedTypeReferenceDirective[];
-        directoryExists: (directoryName: string) => boolean;
-        constructor(shimHost: LanguageServiceShimHost);
-        log(s: string): void;
-        trace(s: string): void;
-        error(s: string): void;
-        getProjectVersion(): string;
-        useCaseSensitiveFileNames(): boolean;
-        getCompilationSettings(): CompilerOptions;
-        getScriptFileNames(): string[];
-        getScriptSnapshot(fileName: string): IScriptSnapshot;
-        getScriptKind(fileName: string): ScriptKind;
-        getScriptVersion(fileName: string): string;
-        getLocalizedDiagnosticMessages(): any;
-        getCancellationToken(): HostCancellationToken;
-        getCurrentDirectory(): string;
-        getDirectories(path: string): string[];
-        getDefaultLibFileName(options: CompilerOptions): string;
-    }
-    class CoreServicesShimHostAdapter implements ParseConfigHost, ModuleResolutionHost {
-        private shimHost;
-        directoryExists: (directoryName: string) => boolean;
-        realpath: (path: string) => string;
-        constructor(shimHost: CoreServicesShimHost);
-        readDirectory(rootDir: string, extension: string, exclude: string[], depth?: number): string[];
-        fileExists(fileName: string): boolean;
-        readFile(fileName: string): string;
-    }
-    function realizeDiagnostics(diagnostics: Diagnostic[], newLine: string): {
-        message: string;
-        start: number;
-        length: number;
-        category: string;
-        code: number;
-    }[];
-    class TypeScriptServicesFactory implements ShimFactory {
-        private _shims;
-        private documentRegistry;
-        getServicesVersion(): string;
-        createLanguageServiceShim(host: LanguageServiceShimHost): LanguageServiceShim;
-        createClassifierShim(logger: Logger): ClassifierShim;
-        createCoreServicesShim(host: CoreServicesShimHost): CoreServicesShim;
-        close(): void;
-        registerShim(shim: Shim): void;
-        unregisterShim(shim: Shim): void;
-    }
-}
-declare namespace TypeScript.Services {
-    const TypeScriptServicesFactory: typeof ts.TypeScriptServicesFactory;
-}
-declare const toolsVersion: string;
+/// <reference path="../../src/server/protocol.d.ts" />
+declare namespace ts {
+    interface Map<T> {
+        [index: string]: T;
+    }
+    type Path = string & {
+        __pathBrand: any;
+    };
+    interface FileMap<T> {
+        get(fileName: Path): T;
+        set(fileName: Path, value: T): void;
+        contains(fileName: Path): boolean;
+        remove(fileName: Path): void;
+        forEachValue(f: (key: Path, v: T) => void): void;
+        clear(): void;
+    }
+    interface TextRange {
+        pos: number;
+        end: number;
+    }
+    const enum SyntaxKind {
+        Unknown = 0,
+        EndOfFileToken = 1,
+        SingleLineCommentTrivia = 2,
+        MultiLineCommentTrivia = 3,
+        NewLineTrivia = 4,
+        WhitespaceTrivia = 5,
+        ShebangTrivia = 6,
+        ConflictMarkerTrivia = 7,
+        NumericLiteral = 8,
+        StringLiteral = 9,
+        RegularExpressionLiteral = 10,
+        NoSubstitutionTemplateLiteral = 11,
+        TemplateHead = 12,
+        TemplateMiddle = 13,
+        TemplateTail = 14,
+        OpenBraceToken = 15,
+        CloseBraceToken = 16,
+        OpenParenToken = 17,
+        CloseParenToken = 18,
+        OpenBracketToken = 19,
+        CloseBracketToken = 20,
+        DotToken = 21,
+        DotDotDotToken = 22,
+        SemicolonToken = 23,
+        CommaToken = 24,
+        LessThanToken = 25,
+        LessThanSlashToken = 26,
+        GreaterThanToken = 27,
+        LessThanEqualsToken = 28,
+        GreaterThanEqualsToken = 29,
+        EqualsEqualsToken = 30,
+        ExclamationEqualsToken = 31,
+        EqualsEqualsEqualsToken = 32,
+        ExclamationEqualsEqualsToken = 33,
+        EqualsGreaterThanToken = 34,
+        PlusToken = 35,
+        MinusToken = 36,
+        AsteriskToken = 37,
+        AsteriskAsteriskToken = 38,
+        SlashToken = 39,
+        PercentToken = 40,
+        PlusPlusToken = 41,
+        MinusMinusToken = 42,
+        LessThanLessThanToken = 43,
+        GreaterThanGreaterThanToken = 44,
+        GreaterThanGreaterThanGreaterThanToken = 45,
+        AmpersandToken = 46,
+        BarToken = 47,
+        CaretToken = 48,
+        ExclamationToken = 49,
+        TildeToken = 50,
+        AmpersandAmpersandToken = 51,
+        BarBarToken = 52,
+        QuestionToken = 53,
+        ColonToken = 54,
+        AtToken = 55,
+        EqualsToken = 56,
+        PlusEqualsToken = 57,
+        MinusEqualsToken = 58,
+        AsteriskEqualsToken = 59,
+        AsteriskAsteriskEqualsToken = 60,
+        SlashEqualsToken = 61,
+        PercentEqualsToken = 62,
+        LessThanLessThanEqualsToken = 63,
+        GreaterThanGreaterThanEqualsToken = 64,
+        GreaterThanGreaterThanGreaterThanEqualsToken = 65,
+        AmpersandEqualsToken = 66,
+        BarEqualsToken = 67,
+        CaretEqualsToken = 68,
+        Identifier = 69,
+        BreakKeyword = 70,
+        CaseKeyword = 71,
+        CatchKeyword = 72,
+        ClassKeyword = 73,
+        ConstKeyword = 74,
+        ContinueKeyword = 75,
+        DebuggerKeyword = 76,
+        DefaultKeyword = 77,
+        DeleteKeyword = 78,
+        DoKeyword = 79,
+        ElseKeyword = 80,
+        EnumKeyword = 81,
+        ExportKeyword = 82,
+        ExtendsKeyword = 83,
+        FalseKeyword = 84,
+        FinallyKeyword = 85,
+        ForKeyword = 86,
+        FunctionKeyword = 87,
+        IfKeyword = 88,
+        ImportKeyword = 89,
+        InKeyword = 90,
+        InstanceOfKeyword = 91,
+        NewKeyword = 92,
+        NullKeyword = 93,
+        ReturnKeyword = 94,
+        SuperKeyword = 95,
+        SwitchKeyword = 96,
+        ThisKeyword = 97,
+        ThrowKeyword = 98,
+        TrueKeyword = 99,
+        TryKeyword = 100,
+        TypeOfKeyword = 101,
+        VarKeyword = 102,
+        VoidKeyword = 103,
+        WhileKeyword = 104,
+        WithKeyword = 105,
+        ImplementsKeyword = 106,
+        InterfaceKeyword = 107,
+        LetKeyword = 108,
+        PackageKeyword = 109,
+        PrivateKeyword = 110,
+        ProtectedKeyword = 111,
+        PublicKeyword = 112,
+        StaticKeyword = 113,
+        YieldKeyword = 114,
+        AbstractKeyword = 115,
+        AsKeyword = 116,
+        AnyKeyword = 117,
+        AsyncKeyword = 118,
+        AwaitKeyword = 119,
+        BooleanKeyword = 120,
+        ConstructorKeyword = 121,
+        DeclareKeyword = 122,
+        GetKeyword = 123,
+        IsKeyword = 124,
+        ModuleKeyword = 125,
+        NamespaceKeyword = 126,
+        NeverKeyword = 127,
+        ReadonlyKeyword = 128,
+        RequireKeyword = 129,
+        NumberKeyword = 130,
+        SetKeyword = 131,
+        StringKeyword = 132,
+        SymbolKeyword = 133,
+        TypeKeyword = 134,
+        UndefinedKeyword = 135,
+        FromKeyword = 136,
+        GlobalKeyword = 137,
+        OfKeyword = 138,
+        QualifiedName = 139,
+        ComputedPropertyName = 140,
+        TypeParameter = 141,
+        Parameter = 142,
+        Decorator = 143,
+        PropertySignature = 144,
+        PropertyDeclaration = 145,
+        MethodSignature = 146,
+        MethodDeclaration = 147,
+        Constructor = 148,
+        GetAccessor = 149,
+        SetAccessor = 150,
+        CallSignature = 151,
+        ConstructSignature = 152,
+        IndexSignature = 153,
+        TypePredicate = 154,
+        TypeReference = 155,
+        FunctionType = 156,
+        ConstructorType = 157,
+        TypeQuery = 158,
+        TypeLiteral = 159,
+        ArrayType = 160,
+        TupleType = 161,
+        UnionType = 162,
+        IntersectionType = 163,
+        ParenthesizedType = 164,
+        ThisType = 165,
+        StringLiteralType = 166,
+        ObjectBindingPattern = 167,
+        ArrayBindingPattern = 168,
+        BindingElement = 169,
+        ArrayLiteralExpression = 170,
+        ObjectLiteralExpression = 171,
+        PropertyAccessExpression = 172,
+        ElementAccessExpression = 173,
+        CallExpression = 174,
+        NewExpression = 175,
+        TaggedTemplateExpression = 176,
+        TypeAssertionExpression = 177,
+        ParenthesizedExpression = 178,
+        FunctionExpression = 179,
+        ArrowFunction = 180,
+        DeleteExpression = 181,
+        TypeOfExpression = 182,
+        VoidExpression = 183,
+        AwaitExpression = 184,
+        PrefixUnaryExpression = 185,
+        PostfixUnaryExpression = 186,
+        BinaryExpression = 187,
+        ConditionalExpression = 188,
+        TemplateExpression = 189,
+        YieldExpression = 190,
+        SpreadElementExpression = 191,
+        ClassExpression = 192,
+        OmittedExpression = 193,
+        ExpressionWithTypeArguments = 194,
+        AsExpression = 195,
+        NonNullExpression = 196,
+        TemplateSpan = 197,
+        SemicolonClassElement = 198,
+        Block = 199,
+        VariableStatement = 200,
+        EmptyStatement = 201,
+        ExpressionStatement = 202,
+        IfStatement = 203,
+        DoStatement = 204,
+        WhileStatement = 205,
+        ForStatement = 206,
+        ForInStatement = 207,
+        ForOfStatement = 208,
+        ContinueStatement = 209,
+        BreakStatement = 210,
+        ReturnStatement = 211,
+        WithStatement = 212,
+        SwitchStatement = 213,
+        LabeledStatement = 214,
+        ThrowStatement = 215,
+        TryStatement = 216,
+        DebuggerStatement = 217,
+        VariableDeclaration = 218,
+        VariableDeclarationList = 219,
+        FunctionDeclaration = 220,
+        ClassDeclaration = 221,
+        InterfaceDeclaration = 222,
+        TypeAliasDeclaration = 223,
+        EnumDeclaration = 224,
+        ModuleDeclaration = 225,
+        ModuleBlock = 226,
+        CaseBlock = 227,
+        NamespaceExportDeclaration = 228,
+        ImportEqualsDeclaration = 229,
+        ImportDeclaration = 230,
+        ImportClause = 231,
+        NamespaceImport = 232,
+        NamedImports = 233,
+        ImportSpecifier = 234,
+        ExportAssignment = 235,
+        ExportDeclaration = 236,
+        NamedExports = 237,
+        ExportSpecifier = 238,
+        MissingDeclaration = 239,
+        ExternalModuleReference = 240,
+        JsxElement = 241,
+        JsxSelfClosingElement = 242,
+        JsxOpeningElement = 243,
+        JsxText = 244,
+        JsxClosingElement = 245,
+        JsxAttribute = 246,
+        JsxSpreadAttribute = 247,
+        JsxExpression = 248,
+        CaseClause = 249,
+        DefaultClause = 250,
+        HeritageClause = 251,
+        CatchClause = 252,
+        PropertyAssignment = 253,
+        ShorthandPropertyAssignment = 254,
+        EnumMember = 255,
+        SourceFile = 256,
+        JSDocTypeExpression = 257,
+        JSDocAllType = 258,
+        JSDocUnknownType = 259,
+        JSDocArrayType = 260,
+        JSDocUnionType = 261,
+        JSDocTupleType = 262,
+        JSDocNullableType = 263,
+        JSDocNonNullableType = 264,
+        JSDocRecordType = 265,
+        JSDocRecordMember = 266,
+        JSDocTypeReference = 267,
+        JSDocOptionalType = 268,
+        JSDocFunctionType = 269,
+        JSDocVariadicType = 270,
+        JSDocConstructorType = 271,
+        JSDocThisType = 272,
+        JSDocComment = 273,
+        JSDocTag = 274,
+        JSDocParameterTag = 275,
+        JSDocReturnTag = 276,
+        JSDocTypeTag = 277,
+        JSDocTemplateTag = 278,
+        JSDocTypedefTag = 279,
+        JSDocPropertyTag = 280,
+        JSDocTypeLiteral = 281,
+        SyntaxList = 282,
+        Count = 283,
+        FirstAssignment = 56,
+        LastAssignment = 68,
+        FirstReservedWord = 70,
+        LastReservedWord = 105,
+        FirstKeyword = 70,
+        LastKeyword = 138,
+        FirstFutureReservedWord = 106,
+        LastFutureReservedWord = 114,
+        FirstTypeNode = 154,
+        LastTypeNode = 166,
+        FirstPunctuation = 15,
+        LastPunctuation = 68,
+        FirstToken = 0,
+        LastToken = 138,
+        FirstTriviaToken = 2,
+        LastTriviaToken = 7,
+        FirstLiteralToken = 8,
+        LastLiteralToken = 11,
+        FirstTemplateToken = 11,
+        LastTemplateToken = 14,
+        FirstBinaryOperator = 25,
+        LastBinaryOperator = 68,
+        FirstNode = 139,
+        FirstJSDocNode = 257,
+        LastJSDocNode = 281,
+        FirstJSDocTagNode = 273,
+        LastJSDocTagNode = 281,
+    }
+    const enum NodeFlags {
+        None = 0,
+        Export = 1,
+        Ambient = 2,
+        Public = 4,
+        Private = 8,
+        Protected = 16,
+        Static = 32,
+        Readonly = 64,
+        Abstract = 128,
+        Async = 256,
+        Default = 512,
+        Let = 1024,
+        Const = 2048,
+        Namespace = 4096,
+        ExportContext = 8192,
+        ContainsThis = 16384,
+        HasImplicitReturn = 32768,
+        HasExplicitReturn = 65536,
+        GlobalAugmentation = 131072,
+        HasClassExtends = 262144,
+        HasDecorators = 524288,
+        HasParamDecorators = 1048576,
+        HasAsyncFunctions = 2097152,
+        DisallowInContext = 4194304,
+        YieldContext = 8388608,
+        DecoratorContext = 16777216,
+        AwaitContext = 33554432,
+        ThisNodeHasError = 67108864,
+        JavaScriptFile = 134217728,
+        ThisNodeOrAnySubNodesHasError = 268435456,
+        HasAggregatedChildData = 536870912,
+        HasJsxSpreadAttribute = 1073741824,
+        Modifier = 1023,
+        AccessibilityModifier = 28,
+        ParameterPropertyModifier = 92,
+        BlockScoped = 3072,
+        ReachabilityCheckFlags = 98304,
+        EmitHelperFlags = 3932160,
+        ReachabilityAndEmitFlags = 4030464,
+        ContextFlags = 197132288,
+        TypeExcludesFlags = 41943040,
+    }
+    const enum JsxFlags {
+        None = 0,
+        IntrinsicNamedElement = 1,
+        IntrinsicIndexedElement = 2,
+        IntrinsicElement = 3,
+    }
+    const enum RelationComparisonResult {
+        Succeeded = 1,
+        Failed = 2,
+        FailedAndReported = 3,
+    }
+    interface Node extends TextRange {
+        kind: SyntaxKind;
+        flags: NodeFlags;
+        decorators?: NodeArray<Decorator>;
+        modifiers?: ModifiersArray;
+        id?: number;
+        parent?: Node;
+        jsDocComments?: JSDocComment[];
+        symbol?: Symbol;
+        locals?: SymbolTable;
+        nextContainer?: Node;
+        localSymbol?: Symbol;
+        flowNode?: FlowNode;
+    }
+    interface NodeArray<T> extends Array<T>, TextRange {
+        hasTrailingComma?: boolean;
+    }
+    interface ModifiersArray extends NodeArray<Modifier> {
+        flags: number;
+    }
+    interface Modifier extends Node {
+    }
+    interface Identifier extends PrimaryExpression {
+        text: string;
+        originalKeywordKind?: SyntaxKind;
+    }
+    interface QualifiedName extends Node {
+        left: EntityName;
+        right: Identifier;
+    }
+    type EntityName = Identifier | QualifiedName;
+    type PropertyName = Identifier | LiteralExpression | ComputedPropertyName;
+    type DeclarationName = Identifier | LiteralExpression | ComputedPropertyName | BindingPattern;
+    interface Declaration extends Node {
+        _declarationBrand: any;
+        name?: DeclarationName;
+    }
+    interface DeclarationStatement extends Declaration, Statement {
+        name?: Identifier;
+    }
+    interface ComputedPropertyName extends Node {
+        expression: Expression;
+    }
+    interface Decorator extends Node {
+        expression: LeftHandSideExpression;
+    }
+    interface TypeParameterDeclaration extends Declaration {
+        name: Identifier;
+        constraint?: TypeNode;
+        expression?: Expression;
+    }
+    interface SignatureDeclaration extends Declaration {
+        name?: PropertyName;
+        typeParameters?: NodeArray<TypeParameterDeclaration>;
+        parameters: NodeArray<ParameterDeclaration>;
+        type?: TypeNode;
+    }
+    interface CallSignatureDeclaration extends SignatureDeclaration, TypeElement {
+    }
+    interface ConstructSignatureDeclaration extends SignatureDeclaration, TypeElement {
+    }
+    interface VariableDeclaration extends Declaration {
+        parent?: VariableDeclarationList;
+        name: Identifier | BindingPattern;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface VariableDeclarationList extends Node {
+        declarations: NodeArray<VariableDeclaration>;
+    }
+    interface ParameterDeclaration extends Declaration {
+        dotDotDotToken?: Node;
+        name: Identifier | BindingPattern;
+        questionToken?: Node;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface BindingElement extends Declaration {
+        propertyName?: PropertyName;
+        dotDotDotToken?: Node;
+        name: Identifier | BindingPattern;
+        initializer?: Expression;
+    }
+    interface PropertySignature extends TypeElement {
+        name: PropertyName;
+        questionToken?: Node;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface PropertyDeclaration extends ClassElement {
+        questionToken?: Node;
+        name: PropertyName;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface ObjectLiteralElement extends Declaration {
+        _objectLiteralBrandBrand: any;
+        name?: PropertyName;
+    }
+    interface PropertyAssignment extends ObjectLiteralElement {
+        _propertyAssignmentBrand: any;
+        name: PropertyName;
+        questionToken?: Node;
+        initializer: Expression;
+    }
+    interface ShorthandPropertyAssignment extends ObjectLiteralElement {
+        name: Identifier;
+        questionToken?: Node;
+        equalsToken?: Node;
+        objectAssignmentInitializer?: Expression;
+    }
+    interface VariableLikeDeclaration extends Declaration {
+        propertyName?: PropertyName;
+        dotDotDotToken?: Node;
+        name: DeclarationName;
+        questionToken?: Node;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface PropertyLikeDeclaration extends Declaration {
+        name: PropertyName;
+    }
+    interface BindingPattern extends Node {
+        elements: NodeArray<BindingElement>;
+    }
+    interface ObjectBindingPattern extends BindingPattern {
+    }
+    interface ArrayBindingPattern extends BindingPattern {
+    }
+    interface FunctionLikeDeclaration extends SignatureDeclaration {
+        _functionLikeDeclarationBrand: any;
+        asteriskToken?: Node;
+        questionToken?: Node;
+        body?: Block | Expression;
+    }
+    interface FunctionDeclaration extends FunctionLikeDeclaration, DeclarationStatement {
+        name?: Identifier;
+        body?: FunctionBody;
+    }
+    interface MethodSignature extends SignatureDeclaration, TypeElement {
+        name: PropertyName;
+    }
+    interface MethodDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        name: PropertyName;
+        body?: FunctionBody;
+    }
+    interface ConstructorDeclaration extends FunctionLikeDeclaration, ClassElement {
+        body?: FunctionBody;
+    }
+    interface SemicolonClassElement extends ClassElement {
+        _semicolonClassElementBrand: any;
+    }
+    interface AccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        _accessorDeclarationBrand: any;
+        name: PropertyName;
+        body: FunctionBody;
+    }
+    interface GetAccessorDeclaration extends AccessorDeclaration {
+    }
+    interface SetAccessorDeclaration extends AccessorDeclaration {
+    }
+    interface IndexSignatureDeclaration extends SignatureDeclaration, ClassElement, TypeElement {
+        _indexSignatureDeclarationBrand: any;
+    }
+    interface TypeNode extends Node {
+        _typeNodeBrand: any;
+    }
+    interface ThisTypeNode extends TypeNode {
+        _thisTypeNodeBrand: any;
+    }
+    interface FunctionOrConstructorTypeNode extends TypeNode, SignatureDeclaration {
+        _functionOrConstructorTypeNodeBrand: any;
+    }
+    interface FunctionTypeNode extends FunctionOrConstructorTypeNode {
+    }
+    interface ConstructorTypeNode extends FunctionOrConstructorTypeNode {
+    }
+    interface TypeReferenceNode extends TypeNode {
+        typeName: EntityName;
+        typeArguments?: NodeArray<TypeNode>;
+    }
+    interface TypePredicateNode extends TypeNode {
+        parameterName: Identifier | ThisTypeNode;
+        type: TypeNode;
+    }
+    interface TypeQueryNode extends TypeNode {
+        exprName: EntityName;
+    }
+    interface TypeLiteralNode extends TypeNode, Declaration {
+        members: NodeArray<TypeElement>;
+    }
+    interface ArrayTypeNode extends TypeNode {
+        elementType: TypeNode;
+    }
+    interface TupleTypeNode extends TypeNode {
+        elementTypes: NodeArray<TypeNode>;
+    }
+    interface UnionOrIntersectionTypeNode extends TypeNode {
+        types: NodeArray<TypeNode>;
+    }
+    interface UnionTypeNode extends UnionOrIntersectionTypeNode {
+    }
+    interface IntersectionTypeNode extends UnionOrIntersectionTypeNode {
+    }
+    interface ParenthesizedTypeNode extends TypeNode {
+        type: TypeNode;
+    }
+    interface StringLiteralTypeNode extends LiteralLikeNode, TypeNode {
+        _stringLiteralTypeBrand: any;
+    }
+    interface StringLiteral extends LiteralExpression {
+        _stringLiteralBrand: any;
+    }
+    interface Expression extends Node {
+        _expressionBrand: any;
+        contextualType?: Type;
+    }
+    interface OmittedExpression extends Expression {
+    }
+    interface UnaryExpression extends Expression {
+        _unaryExpressionBrand: any;
+    }
+    interface IncrementExpression extends UnaryExpression {
+        _incrementExpressionBrand: any;
+    }
+    interface PrefixUnaryExpression extends IncrementExpression {
+        operator: SyntaxKind;
+        operand: UnaryExpression;
+    }
+    interface PostfixUnaryExpression extends IncrementExpression {
+        operand: LeftHandSideExpression;
+        operator: SyntaxKind;
+    }
+    interface PostfixExpression extends UnaryExpression {
+        _postfixExpressionBrand: any;
+    }
+    interface LeftHandSideExpression extends IncrementExpression {
+        _leftHandSideExpressionBrand: any;
+    }
+    interface MemberExpression extends LeftHandSideExpression {
+        _memberExpressionBrand: any;
+    }
+    interface PrimaryExpression extends MemberExpression {
+        _primaryExpressionBrand: any;
+    }
+    interface DeleteExpression extends UnaryExpression {
+        expression: UnaryExpression;
+    }
+    interface TypeOfExpression extends UnaryExpression {
+        expression: UnaryExpression;
+    }
+    interface VoidExpression extends UnaryExpression {
+        expression: UnaryExpression;
+    }
+    interface AwaitExpression extends UnaryExpression {
+        expression: UnaryExpression;
+    }
+    interface YieldExpression extends Expression {
+        asteriskToken?: Node;
+        expression?: Expression;
+    }
+    interface BinaryExpression extends Expression, Declaration {
+        left: Expression;
+        operatorToken: Node;
+        right: Expression;
+    }
+    interface ConditionalExpression extends Expression {
+        condition: Expression;
+        questionToken: Node;
+        whenTrue: Expression;
+        colonToken: Node;
+        whenFalse: Expression;
+    }
+    type FunctionBody = Block;
+    type ConciseBody = FunctionBody | Expression;
+    interface FunctionExpression extends PrimaryExpression, FunctionLikeDeclaration {
+        name?: Identifier;
+        body: FunctionBody;
+    }
+    interface ArrowFunction extends Expression, FunctionLikeDeclaration {
+        equalsGreaterThanToken: Node;
+        body: ConciseBody;
+    }
+    interface LiteralLikeNode extends Node {
+        text: string;
+        isUnterminated?: boolean;
+        hasExtendedUnicodeEscape?: boolean;
+        isOctalLiteral?: boolean;
+    }
+    interface LiteralExpression extends LiteralLikeNode, PrimaryExpression {
+        _literalExpressionBrand: any;
+    }
+    interface TemplateLiteralFragment extends LiteralLikeNode {
+        _templateLiteralFragmentBrand: any;
+    }
+    interface TemplateExpression extends PrimaryExpression {
+        head: TemplateLiteralFragment;
+        templateSpans: NodeArray<TemplateSpan>;
+    }
+    interface TemplateSpan extends Node {
+        expression: Expression;
+        literal: TemplateLiteralFragment;
+    }
+    interface ParenthesizedExpression extends PrimaryExpression {
+        expression: Expression;
+    }
+    interface ArrayLiteralExpression extends PrimaryExpression {
+        elements: NodeArray<Expression>;
+        multiLine?: boolean;
+    }
+    interface SpreadElementExpression extends Expression {
+        expression: Expression;
+    }
+    interface ObjectLiteralExpression extends PrimaryExpression, Declaration {
+        properties: NodeArray<ObjectLiteralElement>;
+        multiLine?: boolean;
+    }
+    interface PropertyAccessExpression extends MemberExpression, Declaration {
+        expression: LeftHandSideExpression;
+        dotToken: Node;
+        name: Identifier;
+    }
+    type IdentifierOrPropertyAccess = Identifier | PropertyAccessExpression;
+    interface ElementAccessExpression extends MemberExpression {
+        expression: LeftHandSideExpression;
+        argumentExpression?: Expression;
+    }
+    interface CallExpression extends LeftHandSideExpression, Declaration {
+        expression: LeftHandSideExpression;
+        typeArguments?: NodeArray<TypeNode>;
+        arguments: NodeArray<Expression>;
+    }
+    interface ExpressionWithTypeArguments extends TypeNode {
+        expression: LeftHandSideExpression;
+        typeArguments?: NodeArray<TypeNode>;
+    }
+    interface NewExpression extends CallExpression, PrimaryExpression {
+    }
+    interface TaggedTemplateExpression extends MemberExpression {
+        tag: LeftHandSideExpression;
+        template: LiteralExpression | TemplateExpression;
+    }
+    type CallLikeExpression = CallExpression | NewExpression | TaggedTemplateExpression | Decorator;
+    interface AsExpression extends Expression {
+        expression: Expression;
+        type: TypeNode;
+    }
+    interface TypeAssertion extends UnaryExpression {
+        type: TypeNode;
+        expression: UnaryExpression;
+    }
+    type AssertionExpression = TypeAssertion | AsExpression;
+    interface NonNullExpression extends LeftHandSideExpression {
+        expression: Expression;
+    }
+    interface JsxElement extends PrimaryExpression {
+        openingElement: JsxOpeningElement;
+        children: NodeArray<JsxChild>;
+        closingElement: JsxClosingElement;
+    }
+    interface JsxOpeningElement extends Expression {
+        _openingElementBrand?: any;
+        tagName: EntityName;
+        attributes: NodeArray<JsxAttribute | JsxSpreadAttribute>;
+    }
+    interface JsxSelfClosingElement extends PrimaryExpression, JsxOpeningElement {
+        _selfClosingElementBrand?: any;
+    }
+    type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
+    interface JsxAttribute extends Node {
+        name: Identifier;
+        initializer?: Expression;
+    }
+    interface JsxSpreadAttribute extends Node {
+        expression: Expression;
+    }
+    interface JsxClosingElement extends Node {
+        tagName: EntityName;
+    }
+    interface JsxExpression extends Expression {
+        expression?: Expression;
+    }
+    interface JsxText extends Node {
+        _jsxTextExpressionBrand: any;
+    }
+    type JsxChild = JsxText | JsxExpression | JsxElement | JsxSelfClosingElement;
+    interface Statement extends Node {
+        _statementBrand: any;
+    }
+    interface EmptyStatement extends Statement {
+    }
+    interface DebuggerStatement extends Statement {
+    }
+    interface MissingDeclaration extends DeclarationStatement, ClassElement, ObjectLiteralElement, TypeElement {
+        name?: Identifier;
+    }
+    type BlockLike = SourceFile | Block | ModuleBlock | CaseClause;
+    interface Block extends Statement {
+        statements: NodeArray<Statement>;
+    }
+    interface VariableStatement extends Statement {
+        declarationList: VariableDeclarationList;
+    }
+    interface ExpressionStatement extends Statement {
+        expression: Expression;
+    }
+    interface IfStatement extends Statement {
+        expression: Expression;
+        thenStatement: Statement;
+        elseStatement?: Statement;
+    }
+    interface IterationStatement extends Statement {
+        statement: Statement;
+    }
+    interface DoStatement extends IterationStatement {
+        expression: Expression;
+    }
+    interface WhileStatement extends IterationStatement {
+        expression: Expression;
+    }
+    interface ForStatement extends IterationStatement {
+        initializer?: VariableDeclarationList | Expression;
+        condition?: Expression;
+        incrementor?: Expression;
+    }
+    interface ForInStatement extends IterationStatement {
+        initializer: VariableDeclarationList | Expression;
+        expression: Expression;
+    }
+    interface ForOfStatement extends IterationStatement {
+        initializer: VariableDeclarationList | Expression;
+        expression: Expression;
+    }
+    interface BreakStatement extends Statement {
+        label?: Identifier;
+    }
+    interface ContinueStatement extends Statement {
+        label?: Identifier;
+    }
+    type BreakOrContinueStatement = BreakStatement | ContinueStatement;
+    interface ReturnStatement extends Statement {
+        expression?: Expression;
+    }
+    interface WithStatement extends Statement {
+        expression: Expression;
+        statement: Statement;
+    }
+    interface SwitchStatement extends Statement {
+        expression: Expression;
+        caseBlock: CaseBlock;
+    }
+    interface CaseBlock extends Node {
+        clauses: NodeArray<CaseOrDefaultClause>;
+    }
+    interface CaseClause extends Node {
+        expression: Expression;
+        statements: NodeArray<Statement>;
+    }
+    interface DefaultClause extends Node {
+        statements: NodeArray<Statement>;
+    }
+    type CaseOrDefaultClause = CaseClause | DefaultClause;
+    interface LabeledStatement extends Statement {
+        label: Identifier;
+        statement: Statement;
+    }
+    interface ThrowStatement extends Statement {
+        expression: Expression;
+    }
+    interface TryStatement extends Statement {
+        tryBlock: Block;
+        catchClause?: CatchClause;
+        finallyBlock?: Block;
+    }
+    interface CatchClause extends Node {
+        variableDeclaration: VariableDeclaration;
+        block: Block;
+    }
+    type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration;
+    interface ClassLikeDeclaration extends Declaration {
+        name?: Identifier;
+        typeParameters?: NodeArray<TypeParameterDeclaration>;
+        heritageClauses?: NodeArray<HeritageClause>;
+        members: NodeArray<ClassElement>;
+    }
+    interface ClassDeclaration extends ClassLikeDeclaration, DeclarationStatement {
+        name?: Identifier;
+    }
+    interface ClassExpression extends ClassLikeDeclaration, PrimaryExpression {
+    }
+    interface ClassElement extends Declaration {
+        _classElementBrand: any;
+        name?: PropertyName;
+    }
+    interface TypeElement extends Declaration {
+        _typeElementBrand: any;
+        name?: PropertyName;
+        questionToken?: Node;
+    }
+    interface InterfaceDeclaration extends DeclarationStatement {
+        name: Identifier;
+        typeParameters?: NodeArray<TypeParameterDeclaration>;
+        heritageClauses?: NodeArray<HeritageClause>;
+        members: NodeArray<TypeElement>;
+    }
+    interface HeritageClause extends Node {
+        token: SyntaxKind;
+        types?: NodeArray<ExpressionWithTypeArguments>;
+    }
+    interface TypeAliasDeclaration extends DeclarationStatement {
+        name: Identifier;
+        typeParameters?: NodeArray<TypeParameterDeclaration>;
+        type: TypeNode;
+    }
+    interface EnumMember extends Declaration {
+        name: DeclarationName;
+        initializer?: Expression;
+    }
+    interface EnumDeclaration extends DeclarationStatement {
+        name: Identifier;
+        members: NodeArray<EnumMember>;
+    }
+    type ModuleBody = ModuleBlock | ModuleDeclaration;
+    interface ModuleDeclaration extends DeclarationStatement {
+        name: Identifier | LiteralExpression;
+        body: ModuleBlock | ModuleDeclaration;
+    }
+    interface ModuleBlock extends Node, Statement {
+        statements: NodeArray<Statement>;
+    }
+    interface ImportEqualsDeclaration extends DeclarationStatement {
+        name: Identifier;
+        moduleReference: EntityName | ExternalModuleReference;
+    }
+    interface ExternalModuleReference extends Node {
+        expression?: Expression;
+    }
+    interface ImportDeclaration extends Statement {
+        importClause?: ImportClause;
+        moduleSpecifier: Expression;
+    }
+    interface ImportClause extends Declaration {
+        name?: Identifier;
+        namedBindings?: NamespaceImport | NamedImports;
+    }
+    interface NamespaceImport extends Declaration {
+        name: Identifier;
+    }
+    interface NamespaceExportDeclaration extends DeclarationStatement {
+        name: Identifier;
+        moduleReference: LiteralLikeNode;
+    }
+    interface ExportDeclaration extends DeclarationStatement {
+        exportClause?: NamedExports;
+        moduleSpecifier?: Expression;
+    }
+    interface NamedImports extends Node {
+        elements: NodeArray<ImportSpecifier>;
+    }
+    interface NamedExports extends Node {
+        elements: NodeArray<ExportSpecifier>;
+    }
+    type NamedImportsOrExports = NamedImports | NamedExports;
+    interface ImportSpecifier extends Declaration {
+        propertyName?: Identifier;
+        name: Identifier;
+    }
+    interface ExportSpecifier extends Declaration {
+        propertyName?: Identifier;
+        name: Identifier;
+    }
+    type ImportOrExportSpecifier = ImportSpecifier | ExportSpecifier;
+    interface ExportAssignment extends DeclarationStatement {
+        isExportEquals?: boolean;
+        expression: Expression;
+    }
+    interface FileReference extends TextRange {
+        fileName: string;
+    }
+    interface CommentRange extends TextRange {
+        hasTrailingNewLine?: boolean;
+        kind: SyntaxKind;
+    }
+    interface JSDocTypeExpression extends Node {
+        type: JSDocType;
+    }
+    interface JSDocType extends TypeNode {
+        _jsDocTypeBrand: any;
+    }
+    interface JSDocAllType extends JSDocType {
+        _JSDocAllTypeBrand: any;
+    }
+    interface JSDocUnknownType extends JSDocType {
+        _JSDocUnknownTypeBrand: any;
+    }
+    interface JSDocArrayType extends JSDocType {
+        elementType: JSDocType;
+    }
+    interface JSDocUnionType extends JSDocType {
+        types: NodeArray<JSDocType>;
+    }
+    interface JSDocTupleType extends JSDocType {
+        types: NodeArray<JSDocType>;
+    }
+    interface JSDocNonNullableType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocNullableType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocRecordType extends JSDocType, TypeLiteralNode {
+        members: NodeArray<JSDocRecordMember>;
+    }
+    interface JSDocTypeReference extends JSDocType {
+        name: EntityName;
+        typeArguments: NodeArray<JSDocType>;
+    }
+    interface JSDocOptionalType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocFunctionType extends JSDocType, SignatureDeclaration {
+        parameters: NodeArray<ParameterDeclaration>;
+        type: JSDocType;
+    }
+    interface JSDocVariadicType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocConstructorType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocThisType extends JSDocType {
+        type: JSDocType;
+    }
+    type JSDocTypeReferencingNode = JSDocThisType | JSDocConstructorType | JSDocVariadicType | JSDocOptionalType | JSDocNullableType | JSDocNonNullableType;
+    interface JSDocRecordMember extends PropertySignature {
+        name: Identifier | LiteralExpression;
+        type?: JSDocType;
+    }
+    interface JSDocComment extends Node {
+        tags: NodeArray<JSDocTag>;
+    }
+    interface JSDocTag extends Node {
+        atToken: Node;
+        tagName: Identifier;
+    }
+    interface JSDocTemplateTag extends JSDocTag {
+        typeParameters: NodeArray<TypeParameterDeclaration>;
+    }
+    interface JSDocReturnTag extends JSDocTag {
+        typeExpression: JSDocTypeExpression;
+    }
+    interface JSDocTypeTag extends JSDocTag {
+        typeExpression: JSDocTypeExpression;
+    }
+    interface JSDocTypedefTag extends JSDocTag, Declaration {
+        name?: Identifier;
+        typeExpression?: JSDocTypeExpression;
+        jsDocTypeLiteral?: JSDocTypeLiteral;
+    }
+    interface JSDocPropertyTag extends JSDocTag, TypeElement {
+        name: Identifier;
+        typeExpression: JSDocTypeExpression;
+    }
+    interface JSDocTypeLiteral extends JSDocType {
+        jsDocPropertyTags?: NodeArray<JSDocPropertyTag>;
+        jsDocTypeTag?: JSDocTypeTag;
+    }
+    interface JSDocParameterTag extends JSDocTag {
+        preParameterName?: Identifier;
+        typeExpression?: JSDocTypeExpression;
+        postParameterName?: Identifier;
+        isBracketed: boolean;
+    }
+    const enum FlowFlags {
+        Unreachable = 1,
+        Start = 2,
+        BranchLabel = 4,
+        LoopLabel = 8,
+        Assignment = 16,
+        TrueCondition = 32,
+        FalseCondition = 64,
+        Referenced = 128,
+        Shared = 256,
+        Label = 12,
+        Condition = 96,
+    }
+    interface FlowNode {
+        flags: FlowFlags;
+        id?: number;
+    }
+    interface FlowStart extends FlowNode {
+        container?: FunctionExpression | ArrowFunction;
+    }
+    interface FlowLabel extends FlowNode {
+        antecedents: FlowNode[];
+    }
+    interface FlowAssignment extends FlowNode {
+        node: Expression | VariableDeclaration | BindingElement;
+        antecedent: FlowNode;
+    }
+    interface FlowCondition extends FlowNode {
+        expression: Expression;
+        antecedent: FlowNode;
+    }
+    interface AmdDependency {
+        path: string;
+        name: string;
+    }
+    interface SourceFile extends Declaration {
+        statements: NodeArray<Statement>;
+        endOfFileToken: Node;
+        fileName: string;
+        path: Path;
+        text: string;
+        amdDependencies: AmdDependency[];
+        moduleName: string;
+        referencedFiles: FileReference[];
+        typeReferenceDirectives: FileReference[];
+        languageVariant: LanguageVariant;
+        isDeclarationFile: boolean;
+        renamedDependencies?: Map<string>;
+        hasNoDefaultLib: boolean;
+        languageVersion: ScriptTarget;
+        scriptKind: ScriptKind;
+        externalModuleIndicator: Node;
+        commonJsModuleIndicator: Node;
+        identifiers: Map<string>;
+        nodeCount: number;
+        identifierCount: number;
+        symbolCount: number;
+        parseDiagnostics: Diagnostic[];
+        bindDiagnostics: Diagnostic[];
+        lineMap: number[];
+        classifiableNames?: Map<string>;
+        resolvedModules: Map<ResolvedModule>;
+        resolvedTypeReferenceDirectiveNames: Map<ResolvedTypeReferenceDirective>;
+        imports: LiteralExpression[];
+        moduleAugmentations: LiteralExpression[];
+        patternAmbientModules?: PatternAmbientModule[];
+    }
+    interface ScriptReferenceHost {
+        getCompilerOptions(): CompilerOptions;
+        getSourceFile(fileName: string): SourceFile;
+        getSourceFileByPath(path: Path): SourceFile;
+        getCurrentDirectory(): string;
+    }
+    interface ParseConfigHost {
+        readDirectory(rootDir: string, extension: string, exclude: string[]): string[];
+    }
+    interface WriteFileCallback {
+        (fileName: string, data: string, writeByteOrderMark: boolean, onError?: (message: string) => void, sourceFiles?: SourceFile[]): void;
+    }
+    class OperationCanceledException {
+    }
+    interface CancellationToken {
+        isCancellationRequested(): boolean;
+        throwIfCancellationRequested(): void;
+    }
+    interface Program extends ScriptReferenceHost {
+        getRootFileNames(): string[];
+        getSourceFiles(): SourceFile[];
+        emit(targetSourceFile?: SourceFile, writeFile?: WriteFileCallback, cancellationToken?: CancellationToken): EmitResult;
+        getOptionsDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
+        getGlobalDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
+        getSyntacticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+        getSemanticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+        getDeclarationDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+        getTypeChecker(): TypeChecker;
+        getCommonSourceDirectory(): string;
+        getDiagnosticsProducingTypeChecker(): TypeChecker;
+        getClassifiableNames(): Map<string>;
+        getNodeCount(): number;
+        getIdentifierCount(): number;
+        getSymbolCount(): number;
+        getTypeCount(): number;
+        getFileProcessingDiagnostics(): DiagnosticCollection;
+        getResolvedTypeReferenceDirectives(): Map<ResolvedTypeReferenceDirective>;
+        structureIsReused?: boolean;
+    }
+    interface SourceMapSpan {
+        emittedLine: number;
+        emittedColumn: number;
+        sourceLine: number;
+        sourceColumn: number;
+        nameIndex?: number;
+        sourceIndex: number;
+    }
+    interface SourceMapData {
+        sourceMapFilePath: string;
+        jsSourceMappingURL: string;
+        sourceMapFile: string;
+        sourceMapSourceRoot: string;
+        sourceMapSources: string[];
+        sourceMapSourcesContent?: string[];
+        inputSourceFileNames: string[];
+        sourceMapNames?: string[];
+        sourceMapMappings: string;
+        sourceMapDecodedMappings: SourceMapSpan[];
+    }
+    enum ExitStatus {
+        Success = 0,
+        DiagnosticsPresent_OutputsSkipped = 1,
+        DiagnosticsPresent_OutputsGenerated = 2,
+    }
+    interface EmitResult {
+        emitSkipped: boolean;
+        diagnostics: Diagnostic[];
+        emittedFiles: string[];
+        sourceMaps: SourceMapData[];
+    }
+    interface TypeCheckerHost {
+        getCompilerOptions(): CompilerOptions;
+        getSourceFiles(): SourceFile[];
+        getSourceFile(fileName: string): SourceFile;
+        getResolvedTypeReferenceDirectives(): Map<ResolvedTypeReferenceDirective>;
+    }
+    interface TypeChecker {
+        getTypeOfSymbolAtLocation(symbol: Symbol, node: Node): Type;
+        getDeclaredTypeOfSymbol(symbol: Symbol): Type;
+        getPropertiesOfType(type: Type): Symbol[];
+        getPropertyOfType(type: Type, propertyName: string): Symbol;
+        getSignaturesOfType(type: Type, kind: SignatureKind): Signature[];
+        getIndexTypeOfType(type: Type, kind: IndexKind): Type;
+        getBaseTypes(type: InterfaceType): ObjectType[];
+        getReturnTypeOfSignature(signature: Signature): Type;
+        getNonNullableType(type: Type): Type;
+        getSymbolsInScope(location: Node, meaning: SymbolFlags): Symbol[];
+        getSymbolAtLocation(node: Node): Symbol;
+        getSymbolsOfParameterPropertyDeclaration(parameter: ParameterDeclaration, parameterName: string): Symbol[];
+        getShorthandAssignmentValueSymbol(location: Node): Symbol;
+        getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol;
+        getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol;
+        getTypeAtLocation(node: Node): Type;
+        typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
+        symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): string;
+        getSymbolDisplayBuilder(): SymbolDisplayBuilder;
+        getFullyQualifiedName(symbol: Symbol): string;
+        getAugmentedPropertiesOfType(type: Type): Symbol[];
+        getRootSymbols(symbol: Symbol): Symbol[];
+        getContextualType(node: Expression): Type;
+        getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature;
+        getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature;
+        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
+        isUndefinedSymbol(symbol: Symbol): boolean;
+        isArgumentsSymbol(symbol: Symbol): boolean;
+        isUnknownSymbol(symbol: Symbol): boolean;
+        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
+        isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName, propertyName: string): boolean;
+        getAliasedSymbol(symbol: Symbol): Symbol;
+        getExportsOfModule(moduleSymbol: Symbol): Symbol[];
+        getJsxElementAttributesType(elementNode: JsxOpeningLikeElement): Type;
+        getJsxIntrinsicTagNames(): Symbol[];
+        isOptionalParameter(node: ParameterDeclaration): boolean;
+        getDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+        getGlobalDiagnostics(): Diagnostic[];
+        getEmitResolver(sourceFile?: SourceFile, cancellationToken?: CancellationToken): EmitResolver;
+        getNodeCount(): number;
+        getIdentifierCount(): number;
+        getSymbolCount(): number;
+        getTypeCount(): number;
+    }
+    interface SymbolDisplayBuilder {
+        buildTypeDisplay(type: Type, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildSymbolDisplay(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): void;
+        buildSignatureDisplay(signatures: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
+        buildParameterDisplay(parameter: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildTypeParameterDisplay(tp: TypeParameter, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildTypePredicateDisplay(predicate: TypePredicate, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildTypeParameterDisplayFromSymbol(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildDisplayForParametersAndDelimiters(thisType: Type, parameters: Symbol[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildDisplayForTypeParametersAndDelimiters(typeParameters: TypeParameter[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildReturnTypeDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+    }
+    interface SymbolWriter {
+        writeKeyword(text: string): void;
+        writeOperator(text: string): void;
+        writePunctuation(text: string): void;
+        writeSpace(text: string): void;
+        writeStringLiteral(text: string): void;
+        writeParameter(text: string): void;
+        writeSymbol(text: string, symbol: Symbol): void;
+        writeLine(): void;
+        increaseIndent(): void;
+        decreaseIndent(): void;
+        clear(): void;
+        trackSymbol(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): void;
+        reportInaccessibleThisError(): void;
+    }
+    const enum TypeFormatFlags {
+        None = 0,
+        WriteArrayAsGenericType = 1,
+        UseTypeOfFunction = 2,
+        NoTruncation = 4,
+        WriteArrowStyleSignature = 8,
+        WriteOwnNameForAnyLike = 16,
+        WriteTypeArgumentsOfSignature = 32,
+        InElementType = 64,
+        UseFullyQualifiedType = 128,
+        InFirstTypeArgument = 256,
+    }
+    const enum SymbolFormatFlags {
+        None = 0,
+        WriteTypeParametersOrArguments = 1,
+        UseOnlyExternalAliasing = 2,
+    }
+    const enum SymbolAccessibility {
+        Accessible = 0,
+        NotAccessible = 1,
+        CannotBeNamed = 2,
+    }
+    const enum TypePredicateKind {
+        This = 0,
+        Identifier = 1,
+    }
+    interface TypePredicateBase {
+        kind: TypePredicateKind;
+        type: Type;
+    }
+    interface ThisTypePredicate extends TypePredicateBase {
+        _thisTypePredicateBrand: any;
+    }
+    interface IdentifierTypePredicate extends TypePredicateBase {
+        parameterName: string;
+        parameterIndex: number;
+    }
+    type TypePredicate = IdentifierTypePredicate | ThisTypePredicate;
+    type AnyImportSyntax = ImportDeclaration | ImportEqualsDeclaration;
+    interface SymbolVisibilityResult {
+        accessibility: SymbolAccessibility;
+        aliasesToMakeVisible?: AnyImportSyntax[];
+        errorSymbolName?: string;
+        errorNode?: Node;
+    }
+    interface SymbolAccessibilityResult extends SymbolVisibilityResult {
+        errorModuleName?: string;
+    }
+    enum TypeReferenceSerializationKind {
+        Unknown = 0,
+        TypeWithConstructSignatureAndValue = 1,
+        VoidType = 2,
+        NumberLikeType = 3,
+        StringLikeType = 4,
+        BooleanType = 5,
+        ArrayLikeType = 6,
+        ESSymbolType = 7,
+        TypeWithCallSignature = 8,
+        ObjectType = 9,
+    }
+    interface EmitResolver {
+        hasGlobalName(name: string): boolean;
+        getReferencedExportContainer(node: Identifier): SourceFile | ModuleDeclaration | EnumDeclaration;
+        getReferencedImportDeclaration(node: Identifier): Declaration;
+        getReferencedDeclarationWithCollidingName(node: Identifier): Declaration;
+        isDeclarationWithCollidingName(node: Declaration): boolean;
+        isValueAliasDeclaration(node: Node): boolean;
+        isReferencedAliasDeclaration(node: Node, checkChildren?: boolean): boolean;
+        isTopLevelValueImportEqualsWithEntityName(node: ImportEqualsDeclaration): boolean;
+        getNodeCheckFlags(node: Node): NodeCheckFlags;
+        isDeclarationVisible(node: Declaration): boolean;
+        collectLinkedAliases(node: Identifier): Node[];
+        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
+        writeTypeOfDeclaration(declaration: AccessorDeclaration | VariableLikeDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
+        writeReturnTypeOfSignatureDeclaration(signatureDeclaration: SignatureDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
+        writeTypeOfExpression(expr: Expression, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
+        writeBaseConstructorTypeOfClass(node: ClassLikeDeclaration, enclosingDeclaration: Node, flags: TypeFormatFlags, writer: SymbolWriter): void;
+        isSymbolAccessible(symbol: Symbol, enclosingDeclaration: Node, meaning: SymbolFlags): SymbolAccessibilityResult;
+        isEntityNameVisible(entityName: EntityName | Expression, enclosingDeclaration: Node): SymbolVisibilityResult;
+        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
+        getReferencedValueDeclaration(reference: Identifier): Declaration;
+        getTypeReferenceSerializationKind(typeName: EntityName): TypeReferenceSerializationKind;
+        isOptionalParameter(node: ParameterDeclaration): boolean;
+        moduleExportsSomeValue(moduleReferenceExpression: Expression): boolean;
+        isArgumentsLocalBinding(node: Identifier): boolean;
+        getExternalModuleFileFromDeclaration(declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration | ModuleDeclaration): SourceFile;
+        getTypeReferenceDirectivesForEntityName(name: EntityName | PropertyAccessExpression): string[];
+        getTypeReferenceDirectivesForSymbol(symbol: Symbol, meaning?: SymbolFlags): string[];
+    }
+    const enum SymbolFlags {
+        None = 0,
+        FunctionScopedVariable = 1,
+        BlockScopedVariable = 2,
+        Property = 4,
+        EnumMember = 8,
+        Function = 16,
+        Class = 32,
+        Interface = 64,
+        ConstEnum = 128,
+        RegularEnum = 256,
+        ValueModule = 512,
+        NamespaceModule = 1024,
+        TypeLiteral = 2048,
+        ObjectLiteral = 4096,
+        Method = 8192,
+        Constructor = 16384,
+        GetAccessor = 32768,
+        SetAccessor = 65536,
+        Signature = 131072,
+        TypeParameter = 262144,
+        TypeAlias = 524288,
+        ExportValue = 1048576,
+        ExportType = 2097152,
+        ExportNamespace = 4194304,
+        Alias = 8388608,
+        Instantiated = 16777216,
+        Merged = 33554432,
+        Transient = 67108864,
+        Prototype = 134217728,
+        SyntheticProperty = 268435456,
+        Optional = 536870912,
+        ExportStar = 1073741824,
+        Enum = 384,
+        Variable = 3,
+        Value = 107455,
+        Type = 793056,
+        Namespace = 1536,
+        Module = 1536,
+        Accessor = 98304,
+        FunctionScopedVariableExcludes = 107454,
+        BlockScopedVariableExcludes = 107455,
+        ParameterExcludes = 107455,
+        PropertyExcludes = 0,
+        EnumMemberExcludes = 107455,
+        FunctionExcludes = 106927,
+        ClassExcludes = 899519,
+        InterfaceExcludes = 792960,
+        RegularEnumExcludes = 899327,
+        ConstEnumExcludes = 899967,
+        ValueModuleExcludes = 106639,
+        NamespaceModuleExcludes = 0,
+        MethodExcludes = 99263,
+        GetAccessorExcludes = 41919,
+        SetAccessorExcludes = 74687,
+        TypeParameterExcludes = 530912,
+        TypeAliasExcludes = 793056,
+        AliasExcludes = 8388608,
+        ModuleMember = 8914931,
+        ExportHasLocal = 944,
+        HasExports = 1952,
+        HasMembers = 6240,
+        BlockScoped = 418,
+        PropertyOrAccessor = 98308,
+        Export = 7340032,
+        Classifiable = 788448,
+    }
+    interface Symbol {
+        flags: SymbolFlags;
+        name: string;
+        declarations?: Declaration[];
+        valueDeclaration?: Declaration;
+        members?: SymbolTable;
+        exports?: SymbolTable;
+        globalExports?: SymbolTable;
+        id?: number;
+        mergeId?: number;
+        parent?: Symbol;
+        exportSymbol?: Symbol;
+        constEnumOnlyModule?: boolean;
+    }
+    interface SymbolLinks {
+        target?: Symbol;
+        type?: Type;
+        declaredType?: Type;
+        typeParameters?: TypeParameter[];
+        inferredClassType?: Type;
+        instantiations?: Map<Type>;
+        mapper?: TypeMapper;
+        referenced?: boolean;
+        containingType?: UnionOrIntersectionType;
+        resolvedExports?: SymbolTable;
+        exportsChecked?: boolean;
+        isDeclarationWithCollidingName?: boolean;
+        bindingElement?: BindingElement;
+        exportsSomeValue?: boolean;
+    }
+    interface TransientSymbol extends Symbol, SymbolLinks {
+    }
+    interface SymbolTable {
+        [index: string]: Symbol;
+    }
+    interface Pattern {
+        prefix: string;
+        suffix: string;
+    }
+    interface PatternAmbientModule {
+        pattern: Pattern;
+        symbol: Symbol;
+    }
+    const enum NodeCheckFlags {
+        TypeChecked = 1,
+        LexicalThis = 2,
+        CaptureThis = 4,
+        SuperInstance = 256,
+        SuperStatic = 512,
+        ContextChecked = 1024,
+        AsyncMethodWithSuper = 2048,
+        AsyncMethodWithSuperBinding = 4096,
+        CaptureArguments = 8192,
+        EnumValuesComputed = 16384,
+        LexicalModuleMergesWithClass = 32768,
+        LoopWithCapturedBlockScopedBinding = 65536,
+        CapturedBlockScopedBinding = 131072,
+        BlockScopedBindingInLoop = 262144,
+        ClassWithBodyScopedClassBinding = 524288,
+        BodyScopedClassBinding = 1048576,
+        NeedsLoopOutParameter = 2097152,
+    }
+    interface NodeLinks {
+        resolvedType?: Type;
+        resolvedSignature?: Signature;
+        resolvedSymbol?: Symbol;
+        resolvedIndexInfo?: IndexInfo;
+        flags?: NodeCheckFlags;
+        enumMemberValue?: number;
+        isVisible?: boolean;
+        hasReportedStatementInAmbientContext?: boolean;
+        jsxFlags?: JsxFlags;
+        resolvedJsxType?: Type;
+        hasSuperCall?: boolean;
+        superCall?: ExpressionStatement;
+    }
+    const enum TypeFlags {
+        Any = 1,
+        String = 2,
+        Number = 4,
+        Boolean = 8,
+        Void = 16,
+        Undefined = 32,
+        Null = 64,
+        Enum = 128,
+        StringLiteral = 256,
+        TypeParameter = 512,
+        Class = 1024,
+        Interface = 2048,
+        Reference = 4096,
+        Tuple = 8192,
+        Union = 16384,
+        Intersection = 32768,
+        Anonymous = 65536,
+        Instantiated = 131072,
+        FromSignature = 262144,
+        ObjectLiteral = 524288,
+        FreshObjectLiteral = 1048576,
+        ContainsWideningType = 2097152,
+        ContainsObjectLiteral = 4194304,
+        ContainsAnyFunctionType = 8388608,
+        ESSymbol = 16777216,
+        ThisType = 33554432,
+        ObjectLiteralPatternWithComputedProperties = 67108864,
+        Never = 134217728,
+        Nullable = 96,
+        Falsy = 126,
+        Intrinsic = 150995071,
+        Primitive = 16777726,
+        StringLike = 258,
+        NumberLike = 132,
+        ObjectType = 80896,
+        UnionOrIntersection = 49152,
+        StructuredType = 130048,
+        Narrowable = 16908175,
+        RequiresWidening = 6291456,
+        PropagatingFlags = 14680064,
+    }
+    type DestructuringPattern = BindingPattern | ObjectLiteralExpression | ArrayLiteralExpression;
+    interface Type {
+        flags: TypeFlags;
+        id: number;
+        symbol?: Symbol;
+        pattern?: DestructuringPattern;
+    }
+    interface IntrinsicType extends Type {
+        intrinsicName: string;
+    }
+    interface StringLiteralType extends Type {
+        text: string;
+    }
+    interface ObjectType extends Type {
+    }
+    interface InterfaceType extends ObjectType {
+        typeParameters: TypeParameter[];
+        outerTypeParameters: TypeParameter[];
+        localTypeParameters: TypeParameter[];
+        thisType: TypeParameter;
+        resolvedBaseConstructorType?: Type;
+        resolvedBaseTypes: ObjectType[];
+    }
+    interface InterfaceTypeWithDeclaredMembers extends InterfaceType {
+        declaredProperties: Symbol[];
+        declaredCallSignatures: Signature[];
+        declaredConstructSignatures: Signature[];
+        declaredStringIndexInfo: IndexInfo;
+        declaredNumberIndexInfo: IndexInfo;
+    }
+    interface TypeReference extends ObjectType {
+        target: GenericType;
+        typeArguments: Type[];
+    }
+    interface GenericType extends InterfaceType, TypeReference {
+        instantiations: Map<TypeReference>;
+    }
+    interface TupleType extends ObjectType {
+        elementTypes: Type[];
+    }
+    interface UnionOrIntersectionType extends Type {
+        types: Type[];
+        reducedType: Type;
+        resolvedProperties: SymbolTable;
+    }
+    interface UnionType extends UnionOrIntersectionType {
+    }
+    interface IntersectionType extends UnionOrIntersectionType {
+    }
+    interface AnonymousType extends ObjectType {
+        target?: AnonymousType;
+        mapper?: TypeMapper;
+    }
+    interface ResolvedType extends ObjectType, UnionOrIntersectionType {
+        members: SymbolTable;
+        properties: Symbol[];
+        callSignatures: Signature[];
+        constructSignatures: Signature[];
+        stringIndexInfo?: IndexInfo;
+        numberIndexInfo?: IndexInfo;
+    }
+    interface FreshObjectLiteralType extends ResolvedType {
+        regularType: ResolvedType;
+    }
+    interface IterableOrIteratorType extends ObjectType, UnionType {
+        iterableElementType?: Type;
+        iteratorElementType?: Type;
+    }
+    interface TypeParameter extends Type {
+        constraint: Type;
+        target?: TypeParameter;
+        mapper?: TypeMapper;
+        resolvedApparentType: Type;
+    }
+    const enum SignatureKind {
+        Call = 0,
+        Construct = 1,
+    }
+    interface Signature {
+        declaration: SignatureDeclaration;
+        typeParameters: TypeParameter[];
+        parameters: Symbol[];
+        thisType?: Type;
+        resolvedReturnType: Type;
+        minArgumentCount: number;
+        hasRestParameter: boolean;
+        hasStringLiterals: boolean;
+        target?: Signature;
+        mapper?: TypeMapper;
+        unionSignatures?: Signature[];
+        erasedSignatureCache?: Signature;
+        isolatedSignatureType?: ObjectType;
+        typePredicate?: TypePredicate;
+    }
+    const enum IndexKind {
+        String = 0,
+        Number = 1,
+    }
+    interface IndexInfo {
+        type: Type;
+        isReadonly: boolean;
+        declaration?: SignatureDeclaration;
+    }
+    interface TypeMapper {
+        (t: TypeParameter): Type;
+        mappedTypes?: Type[];
+        instantiations?: Type[];
+        context?: InferenceContext;
+    }
+    interface TypeInferences {
+        primary: Type[];
+        secondary: Type[];
+        isFixed: boolean;
+    }
+    interface InferenceContext {
+        typeParameters: TypeParameter[];
+        inferUnionTypes: boolean;
+        inferences: TypeInferences[];
+        inferredTypes: Type[];
+        mapper?: TypeMapper;
+        failedTypeParameterIndex?: number;
+    }
+    const enum SpecialPropertyAssignmentKind {
+        None = 0,
+        ExportsProperty = 1,
+        ModuleExports = 2,
+        PrototypeProperty = 3,
+        ThisProperty = 4,
+    }
+    interface DiagnosticMessage {
+        key: string;
+        category: DiagnosticCategory;
+        code: number;
+        message: string;
+    }
+    interface DiagnosticMessageChain {
+        messageText: string;
+        category: DiagnosticCategory;
+        code: number;
+        next?: DiagnosticMessageChain;
+    }
+    interface Diagnostic {
+        file: SourceFile;
+        start: number;
+        length: number;
+        messageText: string | DiagnosticMessageChain;
+        category: DiagnosticCategory;
+        code: number;
+    }
+    enum DiagnosticCategory {
+        Warning = 0,
+        Error = 1,
+        Message = 2,
+    }
+    enum ModuleResolutionKind {
+        Classic = 1,
+        NodeJs = 2,
+    }
+    type RootPaths = string[];
+    type PathSubstitutions = Map<string[]>;
+    type TsConfigOnlyOptions = RootPaths | PathSubstitutions;
+    type CompilerOptionsValue = string | number | boolean | (string | number)[] | TsConfigOnlyOptions;
+    interface CompilerOptions {
+        allowJs?: boolean;
+        allowNonTsExtensions?: boolean;
+        allowSyntheticDefaultImports?: boolean;
+        allowUnreachableCode?: boolean;
+        allowUnusedLabels?: boolean;
+        baseUrl?: string;
+        charset?: string;
+        configFilePath?: string;
+        declaration?: boolean;
+        declarationDir?: string;
+        diagnostics?: boolean;
+        emitBOM?: boolean;
+        emitDecoratorMetadata?: boolean;
+        experimentalDecorators?: boolean;
+        forceConsistentCasingInFileNames?: boolean;
+        help?: boolean;
+        init?: boolean;
+        inlineSourceMap?: boolean;
+        inlineSources?: boolean;
+        isolatedModules?: boolean;
+        jsx?: JsxEmit;
+        lib?: string[];
+        listEmittedFiles?: boolean;
+        listFiles?: boolean;
+        locale?: string;
+        mapRoot?: string;
+        module?: ModuleKind;
+        moduleResolution?: ModuleResolutionKind;
+        newLine?: NewLineKind;
+        noEmit?: boolean;
+        noEmitHelpers?: boolean;
+        noEmitOnError?: boolean;
+        noErrorTruncation?: boolean;
+        noFallthroughCasesInSwitch?: boolean;
+        noImplicitAny?: boolean;
+        noImplicitReturns?: boolean;
+        noImplicitThis?: boolean;
+        noImplicitUseStrict?: boolean;
+        noLib?: boolean;
+        noResolve?: boolean;
+        out?: string;
+        outDir?: string;
+        outFile?: string;
+        paths?: PathSubstitutions;
+        preserveConstEnums?: boolean;
+        project?: string;
+        pretty?: DiagnosticStyle;
+        reactNamespace?: string;
+        removeComments?: boolean;
+        rootDir?: string;
+        rootDirs?: RootPaths;
+        skipLibCheck?: boolean;
+        skipDefaultLibCheck?: boolean;
+        sourceMap?: boolean;
+        sourceRoot?: string;
+        strictNullChecks?: boolean;
+        stripInternal?: boolean;
+        suppressExcessPropertyErrors?: boolean;
+        suppressImplicitAnyIndexErrors?: boolean;
+        suppressOutputPathCheck?: boolean;
+        target?: ScriptTarget;
+        traceResolution?: boolean;
+        types?: string[];
+        typesRoot?: string;
+        typesSearchPaths?: string[];
+        version?: boolean;
+        watch?: boolean;
+        [option: string]: CompilerOptionsValue | undefined;
+    }
+    interface TypingOptions {
+        enableAutoDiscovery?: boolean;
+        include?: string[];
+        exclude?: string[];
+        [option: string]: string[] | boolean | undefined;
+    }
+    interface DiscoverTypingsInfo {
+        fileNames: string[];
+        projectRootPath: string;
+        safeListPath: string;
+        packageNameToTypingLocation: Map<string>;
+        typingOptions: TypingOptions;
+        compilerOptions: CompilerOptions;
+    }
+    enum ModuleKind {
+        None = 0,
+        CommonJS = 1,
+        AMD = 2,
+        UMD = 3,
+        System = 4,
+        ES6 = 5,
+        ES2015 = 5,
+    }
+    const enum JsxEmit {
+        None = 0,
+        Preserve = 1,
+        React = 2,
+    }
+    const enum NewLineKind {
+        CarriageReturnLineFeed = 0,
+        LineFeed = 1,
+    }
+    interface LineAndCharacter {
+        line: number;
+        character: number;
+    }
+    const enum ScriptKind {
+        Unknown = 0,
+        JS = 1,
+        JSX = 2,
+        TS = 3,
+        TSX = 4,
+    }
+    const enum ScriptTarget {
+        ES3 = 0,
+        ES5 = 1,
+        ES6 = 2,
+        ES2015 = 2,
+        Latest = 2,
+    }
+    const enum LanguageVariant {
+        Standard = 0,
+        JSX = 1,
+    }
+    const enum DiagnosticStyle {
+        Simple = 0,
+        Pretty = 1,
+    }
+    interface ParsedCommandLine {
+        options: CompilerOptions;
+        typingOptions?: TypingOptions;
+        fileNames: string[];
+        raw?: any;
+        errors: Diagnostic[];
+    }
+    interface CommandLineOptionBase {
+        name: string;
+        type: "string" | "number" | "boolean" | "object" | "list" | Map<number | string>;
+        isFilePath?: boolean;
+        shortName?: string;
+        description?: DiagnosticMessage;
+        paramType?: DiagnosticMessage;
+        experimental?: boolean;
+        isTSConfigOnly?: boolean;
+    }
+    interface CommandLineOptionOfPrimitiveType extends CommandLineOptionBase {
+        type: "string" | "number" | "boolean";
+    }
+    interface CommandLineOptionOfCustomType extends CommandLineOptionBase {
+        type: Map<number | string>;
+    }
+    interface TsConfigOnlyOption extends CommandLineOptionBase {
+        type: "object";
+    }
+    interface CommandLineOptionOfListType extends CommandLineOptionBase {
+        type: "list";
+        element: CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType;
+    }
+    type CommandLineOption = CommandLineOptionOfCustomType | CommandLineOptionOfPrimitiveType | TsConfigOnlyOption | CommandLineOptionOfListType;
+    const enum CharacterCodes {
+        nullCharacter = 0,
+        maxAsciiCharacter = 127,
+        lineFeed = 10,
+        carriageReturn = 13,
+        lineSeparator = 8232,
+        paragraphSeparator = 8233,
+        nextLine = 133,
+        space = 32,
+        nonBreakingSpace = 160,
+        enQuad = 8192,
+        emQuad = 8193,
+        enSpace = 8194,
+        emSpace = 8195,
+        threePerEmSpace = 8196,
+        fourPerEmSpace = 8197,
+        sixPerEmSpace = 8198,
+        figureSpace = 8199,
+        punctuationSpace = 8200,
+        thinSpace = 8201,
+        hairSpace = 8202,
+        zeroWidthSpace = 8203,
+        narrowNoBreakSpace = 8239,
+        ideographicSpace = 12288,
+        mathematicalSpace = 8287,
+        ogham = 5760,
+        _ = 95,
+        $ = 36,
+        _0 = 48,
+        _1 = 49,
+        _2 = 50,
+        _3 = 51,
+        _4 = 52,
+        _5 = 53,
+        _6 = 54,
+        _7 = 55,
+        _8 = 56,
+        _9 = 57,
+        a = 97,
+        b = 98,
+        c = 99,
+        d = 100,
+        e = 101,
+        f = 102,
+        g = 103,
+        h = 104,
+        i = 105,
+        j = 106,
+        k = 107,
+        l = 108,
+        m = 109,
+        n = 110,
+        o = 111,
+        p = 112,
+        q = 113,
+        r = 114,
+        s = 115,
+        t = 116,
+        u = 117,
+        v = 118,
+        w = 119,
+        x = 120,
+        y = 121,
+        z = 122,
+        A = 65,
+        B = 66,
+        C = 67,
+        D = 68,
+        E = 69,
+        F = 70,
+        G = 71,
+        H = 72,
+        I = 73,
+        J = 74,
+        K = 75,
+        L = 76,
+        M = 77,
+        N = 78,
+        O = 79,
+        P = 80,
+        Q = 81,
+        R = 82,
+        S = 83,
+        T = 84,
+        U = 85,
+        V = 86,
+        W = 87,
+        X = 88,
+        Y = 89,
+        Z = 90,
+        ampersand = 38,
+        asterisk = 42,
+        at = 64,
+        backslash = 92,
+        backtick = 96,
+        bar = 124,
+        caret = 94,
+        closeBrace = 125,
+        closeBracket = 93,
+        closeParen = 41,
+        colon = 58,
+        comma = 44,
+        dot = 46,
+        doubleQuote = 34,
+        equals = 61,
+        exclamation = 33,
+        greaterThan = 62,
+        hash = 35,
+        lessThan = 60,
+        minus = 45,
+        openBrace = 123,
+        openBracket = 91,
+        openParen = 40,
+        percent = 37,
+        plus = 43,
+        question = 63,
+        semicolon = 59,
+        singleQuote = 39,
+        slash = 47,
+        tilde = 126,
+        backspace = 8,
+        formFeed = 12,
+        byteOrderMark = 65279,
+        tab = 9,
+        verticalTab = 11,
+    }
+    interface ModuleResolutionHost {
+        fileExists(fileName: string): boolean;
+        readFile(fileName: string): string;
+        trace?(s: string): void;
+        directoryExists?(directoryName: string): boolean;
+        realpath?(path: string): string;
+        getCurrentDirectory?(): string;
+    }
+    interface ResolvedModule {
+        resolvedFileName: string;
+        isExternalLibraryImport?: boolean;
+    }
+    interface ResolvedModuleWithFailedLookupLocations {
+        resolvedModule: ResolvedModule;
+        failedLookupLocations: string[];
+    }
+    interface ResolvedTypeReferenceDirective {
+        primary: boolean;
+        resolvedFileName?: string;
+    }
+    interface ResolvedTypeReferenceDirectiveWithFailedLookupLocations {
+        resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective;
+        failedLookupLocations: string[];
+    }
+    interface CompilerHost extends ModuleResolutionHost {
+        getSourceFile(fileName: string, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile;
+        getSourceFileByPath?(fileName: string, path: Path, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile;
+        getCancellationToken?(): CancellationToken;
+        getDefaultLibFileName(options: CompilerOptions): string;
+        getDefaultLibLocation?(): string;
+        getDefaultTypeDirectiveNames?(rootPath: string): string[];
+        writeFile: WriteFileCallback;
+        getCurrentDirectory(): string;
+        getCanonicalFileName(fileName: string): string;
+        useCaseSensitiveFileNames(): boolean;
+        getNewLine(): string;
+        resolveModuleNames?(moduleNames: string[], containingFile: string): ResolvedModule[];
+        resolveTypeReferenceDirectives?(typeReferenceDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
+    }
+    interface TextSpan {
+        start: number;
+        length: number;
+    }
+    interface TextChangeRange {
+        span: TextSpan;
+        newLength: number;
+    }
+    interface DiagnosticCollection {
+        add(diagnostic: Diagnostic): void;
+        getGlobalDiagnostics(): Diagnostic[];
+        getDiagnostics(fileName?: string): Diagnostic[];
+        getModificationCount(): number;
+        reattachFileDiagnostics(newFile: SourceFile): void;
+    }
+    interface SyntaxList extends Node {
+        _children: Node[];
+    }
+}
+declare namespace ts {
+    const enum Ternary {
+        False = 0,
+        Maybe = 1,
+        True = -1,
+    }
+    function createFileMap<T>(keyMapper?: (key: string) => string): FileMap<T>;
+    function toPath(fileName: string, basePath: string, getCanonicalFileName: (path: string) => string): Path;
+    const enum Comparison {
+        LessThan = -1,
+        EqualTo = 0,
+        GreaterThan = 1,
+    }
+    function forEach<T, U>(array: T[], callback: (element: T, index: number) => U): U;
+    function contains<T>(array: T[], value: T, areEqual?: (a: T, b: T) => boolean): boolean;
+    function indexOf<T>(array: T[], value: T): number;
+    function countWhere<T>(array: T[], predicate: (x: T) => boolean): number;
+    function filter<T>(array: T[], f: (x: T) => boolean): T[];
+    function map<T, U>(array: T[], f: (x: T) => U): U[];
+    function concatenate<T>(array1: T[], array2: T[]): T[];
+    function deduplicate<T>(array: T[], areEqual?: (a: T, b: T) => boolean): T[];
+    function sum(array: any[], prop: string): number;
+    function addRange<T>(to: T[], from: T[]): void;
+    function rangeEquals<T>(array1: T[], array2: T[], pos: number, end: number): boolean;
+    function lastOrUndefined<T>(array: T[]): T;
+    function binarySearch(array: number[], value: number): number;
+    function reduceLeft<T>(array: T[], f: (a: T, x: T) => T): T;
+    function reduceLeft<T, U>(array: T[], f: (a: U, x: T) => U, initial: U): U;
+    function reduceRight<T>(array: T[], f: (a: T, x: T) => T): T;
+    function reduceRight<T, U>(array: T[], f: (a: U, x: T) => U, initial: U): U;
+    function hasProperty<T>(map: Map<T>, key: string): boolean;
+    function getKeys<T>(map: Map<T>): string[];
+    function getProperty<T>(map: Map<T>, key: string): T;
+    function isEmpty<T>(map: Map<T>): boolean;
+    function clone<T>(object: T): T;
+    function extend<T1 extends Map<{}>, T2 extends Map<{}>>(first: T1, second: T2): T1 & T2;
+    function forEachValue<T, U>(map: Map<T>, callback: (value: T) => U): U;
+    function forEachKey<T, U>(map: Map<T>, callback: (key: string) => U): U;
+    function lookUp<T>(map: Map<T>, key: string): T;
+    function copyMap<T>(source: Map<T>, target: Map<T>): void;
+    function arrayToMap<T>(array: T[], makeKey: (value: T) => string): Map<T>;
+    function reduceProperties<T, U>(map: Map<T>, callback: (aggregate: U, value: T, key: string) => U, initial: U): U;
+    function isArray(value: any): value is any[];
+    function memoize<T>(callback: () => T): () => T;
+    let localizedDiagnosticMessages: Map<string>;
+    function getLocaleSpecificMessage(message: DiagnosticMessage): string;
+    function createFileDiagnostic(file: SourceFile, start: number, length: number, message: DiagnosticMessage, ...args: any[]): Diagnostic;
+    function formatMessage(dummy: any, message: DiagnosticMessage): string;
+    function createCompilerDiagnostic(message: DiagnosticMessage, ...args: any[]): Diagnostic;
+    function chainDiagnosticMessages(details: DiagnosticMessageChain, message: DiagnosticMessage, ...args: any[]): DiagnosticMessageChain;
+    function concatenateDiagnosticMessageChains(headChain: DiagnosticMessageChain, tailChain: DiagnosticMessageChain): DiagnosticMessageChain;
+    function compareValues<T>(a: T, b: T): Comparison;
+    function compareDiagnostics(d1: Diagnostic, d2: Diagnostic): Comparison;
+    function sortAndDeduplicateDiagnostics(diagnostics: Diagnostic[]): Diagnostic[];
+    function deduplicateSortedDiagnostics(diagnostics: Diagnostic[]): Diagnostic[];
+    function normalizeSlashes(path: string): string;
+    function getRootLength(path: string): number;
+    let directorySeparator: string;
+    function normalizePath(path: string): string;
+    function getDirectoryPath(path: Path): Path;
+    function getDirectoryPath(path: string): string;
+    function isUrl(path: string): boolean;
+    function isRootedDiskPath(path: string): boolean;
+    function getNormalizedPathComponents(path: string, currentDirectory: string): string[];
+    function getNormalizedAbsolutePath(fileName: string, currentDirectory: string): string;
+    function getNormalizedPathFromPathComponents(pathComponents: string[]): string;
+    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl: string, relativeOrAbsolutePath: string, currentDirectory: string, getCanonicalFileName: (fileName: string) => string, isAbsolutePathAnUrl: boolean): string;
+    function getBaseFileName(path: string): string;
+    function combinePaths(path1: string, path2: string): string;
+    function fileExtensionIs(path: string, extension: string): boolean;
+    function ensureScriptKind(fileName: string, scriptKind?: ScriptKind): ScriptKind;
+    function getScriptKindFromFileName(fileName: string): ScriptKind;
+    const supportedTypeScriptExtensions: string[];
+    const supportedJavascriptExtensions: string[];
+    function getSupportedExtensions(options?: CompilerOptions): string[];
+    function isSupportedSourceFileName(fileName: string, compilerOptions?: CompilerOptions): boolean;
+    function removeFileExtension(path: string): string;
+    function tryRemoveExtension(path: string, extension: string): string;
+    function isJsxOrTsxExtension(ext: string): boolean;
+    interface ObjectAllocator {
+        getNodeConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => Node;
+        getSourceFileConstructor(): new (kind: SyntaxKind, pos?: number, end?: number) => SourceFile;
+        getSymbolConstructor(): new (flags: SymbolFlags, name: string) => Symbol;
+        getTypeConstructor(): new (checker: TypeChecker, flags: TypeFlags) => Type;
+        getSignatureConstructor(): new (checker: TypeChecker) => Signature;
+    }
+    let objectAllocator: ObjectAllocator;
+    const enum AssertionLevel {
+        None = 0,
+        Normal = 1,
+        Aggressive = 2,
+        VeryAggressive = 3,
+    }
+    namespace Debug {
+        function shouldAssert(level: AssertionLevel): boolean;
+        function assert(expression: boolean, message?: string, verboseDebugInfo?: () => string): void;
+        function fail(message?: string): void;
+    }
+    function copyListRemovingItem<T>(item: T, list: T[]): T[];
+    function createGetCanonicalFileName(useCaseSensitivefileNames: boolean): (fileName: string) => string;
+}
+declare namespace ts {
+    type FileWatcherCallback = (fileName: string, removed?: boolean) => void;
+    type DirectoryWatcherCallback = (fileName: string) => void;
+    interface WatchedFile {
+        fileName: string;
+        callback: FileWatcherCallback;
+        mtime?: Date;
+    }
+    interface System {
+        args: string[];
+        newLine: string;
+        useCaseSensitiveFileNames: boolean;
+        write(s: string): void;
+        readFile(path: string, encoding?: string): string;
+        writeFile(path: string, data: string, writeByteOrderMark?: boolean): void;
+        watchFile?(path: string, callback: FileWatcherCallback): FileWatcher;
+        watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
+        resolvePath(path: string): string;
+        fileExists(path: string): boolean;
+        directoryExists(path: string): boolean;
+        createDirectory(path: string): void;
+        getExecutingFilePath(): string;
+        getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
+        readDirectory(path: string, extension?: string, exclude?: string[]): string[];
+        getModifiedTime?(path: string): Date;
+        createHash?(data: string): string;
+        getMemoryUsage?(): number;
+        exit(exitCode?: number): void;
+        realpath?(path: string): string;
+    }
+    interface FileWatcher {
+        close(): void;
+    }
+    interface DirectoryWatcher extends FileWatcher {
+        directoryName: string;
+        referenceCount: number;
+    }
+    var sys: System;
+}
+declare namespace ts {
+    var Diagnostics: {
+        Unterminated_string_literal: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Identifier_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_file_cannot_have_a_reference_to_itself: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Trailing_comma_not_allowed: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Asterisk_Slash_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unexpected_token: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_rest_parameter_must_be_last_in_a_parameter_list: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_cannot_have_question_mark_and_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_required_parameter_cannot_follow_an_optional_parameter: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_index_signature_cannot_have_a_rest_parameter: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_index_signature_parameter_cannot_have_an_accessibility_modifier: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_index_signature_parameter_cannot_have_a_question_mark: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_index_signature_parameter_cannot_have_an_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_index_signature_must_have_a_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_index_signature_parameter_must_have_a_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_index_signature_parameter_type_must_be_string_or_number: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Accessibility_modifier_already_seen: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_modifier_must_precede_1_modifier: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_modifier_already_seen: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_modifier_cannot_appear_on_a_class_element: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        super_must_be_followed_by_an_argument_list_or_member_access: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Only_ambient_modules_can_use_quoted_names: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Statements_are_not_allowed_in_ambient_contexts: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Initializers_are_not_allowed_in_ambient_contexts: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_modifier_cannot_be_used_in_an_ambient_context: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_modifier_cannot_be_used_with_a_class_declaration: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_modifier_cannot_be_used_here: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_modifier_cannot_appear_on_a_data_property: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_modifier_cannot_appear_on_a_module_or_namespace_element: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_0_modifier_cannot_be_used_with_an_interface_declaration: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_rest_parameter_cannot_be_optional: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_rest_parameter_cannot_have_an_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_set_accessor_must_have_exactly_one_parameter: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_set_accessor_cannot_have_an_optional_parameter: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_set_accessor_parameter_cannot_have_an_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_set_accessor_cannot_have_rest_parameter: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_get_accessor_cannot_have_parameters: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_is_not_a_valid_async_function_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_async_function_or_method_must_have_a_valid_awaitable_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Operand_for_await_does_not_have_a_valid_callable_then_member: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Enum_member_must_have_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_export_assignment_cannot_be_used_in_a_namespace: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_modifier_cannot_appear_on_a_type_member: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_modifier_cannot_appear_on_an_index_signature: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_0_modifier_cannot_be_used_with_an_import_declaration: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Invalid_reference_directive_syntax: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_accessor_cannot_be_declared_in_an_ambient_context: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_modifier_cannot_appear_on_a_constructor_declaration: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_modifier_cannot_appear_on_a_parameter: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameters_cannot_appear_on_a_constructor_declaration: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_annotation_cannot_appear_on_a_constructor_declaration: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_accessor_cannot_have_type_parameters: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_set_accessor_cannot_have_a_return_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_index_signature_must_have_exactly_one_parameter: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_list_cannot_be_empty: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_list_cannot_be_empty: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_argument_list_cannot_be_empty: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Invalid_use_of_0_in_strict_mode: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        with_statements_are_not_allowed_in_strict_mode: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        delete_cannot_be_called_on_an_identifier_in_strict_mode: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Jump_target_cannot_cross_function_boundary: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_return_statement_can_only_be_used_within_a_function_body: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Expression_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Duplicate_label_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_export_assignment_cannot_have_modifiers: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Octal_literals_are_not_allowed_in_strict_mode: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_tuple_type_element_list_cannot_be_empty: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Variable_declaration_list_cannot_be_empty: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Digit_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Hexadecimal_digit_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unexpected_end_of_text: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Invalid_character: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Declaration_or_statement_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Statement_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        case_or_default_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_or_signature_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Enum_member_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Variable_declaration_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Argument_expression_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_assignment_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Expression_or_comma_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_declaration_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_declaration_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_argument_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        String_literal_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Line_break_not_permitted_here: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        or_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Declaration_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Import_declarations_in_a_namespace_cannot_reference_a_module: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        File_name_0_differs_from_already_included_file_name_1_only_in_casing: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        const_declarations_must_be_initialized: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        const_declarations_can_only_be_declared_inside_a_block: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        let_declarations_can_only_be_declared_inside_a_block: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unterminated_template_literal: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unterminated_regular_expression_literal: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_object_member_cannot_be_declared_optional: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_yield_expression_is_only_allowed_in_a_generator_body: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Computed_property_names_are_not_allowed_in_enums: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_comma_expression_is_not_allowed_in_a_computed_property_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        extends_clause_already_seen: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        extends_clause_must_precede_implements_clause: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Classes_can_only_extend_a_single_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        implements_clause_already_seen: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Interface_declaration_cannot_have_implements_clause: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Binary_digit_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Octal_digit_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unexpected_token_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_destructuring_pattern_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Array_element_destructuring_pattern_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_destructuring_declaration_must_have_an_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_implementation_cannot_be_declared_in_ambient_contexts: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Modifiers_cannot_appear_here: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Merge_conflict_marker_encountered: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_rest_element_cannot_have_an_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_parameter_property_may_not_be_a_binding_pattern: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_import_declaration_cannot_have_modifiers: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_0_has_no_default_export: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_export_declaration_cannot_have_modifiers: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Export_declarations_are_not_permitted_in_a_namespace: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Catch_clause_variable_name_must_be_an_identifier: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Catch_clause_variable_cannot_have_a_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Catch_clause_variable_cannot_have_an_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unterminated_Unicode_escape_sequence: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Line_terminator_not_permitted_before_arrow: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Decorators_are_not_valid_here: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_class_declaration_without_the_default_modifier_must_have_a_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Export_assignment_is_not_supported_when_module_flag_is_system: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Generators_are_not_allowed_in_an_ambient_context: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_overload_signature_cannot_be_declared_as_a_generator: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_tag_already_specified: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Signature_0_must_have_a_type_predicate: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_find_parameter_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_predicate_0_is_not_assignable_to_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_is_not_in_the_same_position_as_parameter_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_type_predicate_cannot_reference_a_rest_parameter: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_export_assignment_can_only_be_used_in_a_module: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_import_declaration_can_only_be_used_in_a_namespace_or_module: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_export_declaration_can_only_be_used_in_a_module: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_modifier_cannot_be_used_with_1_modifier: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Abstract_methods_can_only_appear_within_an_abstract_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_interface_property_cannot_have_an_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_type_literal_property_cannot_have_an_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_class_member_cannot_have_the_0_keyword: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        with_statements_are_not_allowed_in_an_async_function_block: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        await_expression_is_only_allowed_within_an_async_function: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_body_of_an_if_statement_cannot_be_the_empty_statement: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Global_module_exports_may_only_appear_in_module_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Global_module_exports_may_only_appear_in_declaration_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Global_module_exports_may_only_appear_at_top_level: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Duplicate_identifier_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Static_members_cannot_reference_class_type_parameters: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Circular_definition_of_import_alias_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_find_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_0_has_no_exported_member_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        File_0_is_not_a_module: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_find_module_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_recursively_references_itself_as_a_base_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_class_may_only_extend_another_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_interface_may_only_extend_a_class_or_another_interface: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_0_has_a_circular_constraint: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Generic_type_0_requires_1_type_argument_s: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_is_not_generic: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Global_type_0_must_be_a_class_or_interface_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Global_type_0_must_have_1_type_parameter_s: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_find_global_type_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Named_property_0_of_types_1_and_2_are_not_identical: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Interface_0_cannot_simultaneously_extend_types_1_and_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Excessive_stack_depth_comparing_types_0_and_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_is_not_assignable_to_type_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_redeclare_exported_variable_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_is_missing_in_type_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_is_private_in_type_1_but_not_in_type_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Types_of_property_0_are_incompatible: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_is_optional_in_type_1_but_required_in_type_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Types_of_parameters_0_and_1_are_incompatible: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Index_signature_is_missing_in_type_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Index_signatures_are_incompatible: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        this_cannot_be_referenced_in_a_module_or_namespace_body: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        this_cannot_be_referenced_in_current_location: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        this_cannot_be_referenced_in_constructor_arguments: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        this_cannot_be_referenced_in_a_static_property_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        super_can_only_be_referenced_in_a_derived_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        super_cannot_be_referenced_in_constructor_arguments: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_does_not_exist_on_type_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_is_private_and_only_accessible_within_class_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_does_not_satisfy_the_constraint_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Supplied_parameters_do_not_match_any_signature_of_call_target: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Untyped_function_calls_may_not_accept_type_arguments: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Only_a_void_function_can_be_called_with_the_new_keyword: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_cannot_be_converted_to_type_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        No_best_common_type_exists_among_return_expressions: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Invalid_left_hand_side_of_assignment_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Operator_0_cannot_be_applied_to_types_1_and_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_name_cannot_be_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_parameter_property_is_only_allowed_in_a_constructor_implementation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_rest_parameter_must_be_of_an_array_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_cannot_be_referenced_in_its_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Duplicate_string_index_signature: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Duplicate_number_index_signature: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Constructors_for_derived_classes_must_contain_a_super_call: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_get_accessor_must_return_a_value: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Getter_and_setter_accessors_do_not_agree_in_visibility: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        get_and_set_accessor_must_have_the_same_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_signature_with_an_implementation_cannot_use_a_string_literal_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Overload_signatures_must_all_be_exported_or_non_exported: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Overload_signatures_must_all_be_ambient_or_non_ambient: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Overload_signatures_must_all_be_public_private_or_protected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Overload_signatures_must_all_be_optional_or_required: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_overload_must_be_static: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_overload_must_not_be_static: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_implementation_name_must_be_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Constructor_implementation_is_missing: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_implementation_is_missing_or_not_immediately_following_the_declaration: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Multiple_constructor_implementations_are_not_allowed: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Duplicate_function_implementation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Overload_signature_is_not_compatible_with_function_implementation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Declaration_name_conflicts_with_built_in_global_identifier_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Invalid_left_hand_side_in_for_in_statement: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Setters_cannot_return_a_value: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        All_symbols_within_a_with_block_will_be_resolved_to_any: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Class_name_cannot_be_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Class_0_incorrectly_extends_base_class_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Class_static_side_0_incorrectly_extends_base_class_static_side_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Class_0_incorrectly_implements_interface_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_class_may_only_implement_another_class_or_interface: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Interface_name_cannot_be_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        All_declarations_of_0_must_have_identical_type_parameters: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Interface_0_incorrectly_extends_interface_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Enum_name_cannot_be_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Ambient_module_declaration_cannot_specify_relative_module_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Import_name_cannot_be_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Import_declaration_conflicts_with_local_declaration_of_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Types_have_separate_declarations_of_a_private_property_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_is_protected_in_type_1_but_public_in_type_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Block_scoped_variable_0_used_before_its_declaration: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_redeclare_block_scoped_variable_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_enum_member_cannot_have_a_numeric_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Variable_0_is_used_before_being_assigned: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_alias_0_circularly_references_itself: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_alias_name_cannot_be_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_AMD_module_cannot_have_multiple_name_assignments: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_has_no_property_1_and_no_string_index_signature: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_has_no_property_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_is_not_an_array_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_rest_element_must_be_last_in_an_array_destructuring_pattern: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        this_cannot_be_referenced_in_a_computed_property_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        super_cannot_be_referenced_in_a_computed_property_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_find_global_value_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_0_operator_cannot_be_applied_to_type_symbol: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Enum_declarations_must_all_be_const_or_non_const: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        In_const_enum_declarations_member_initializer_must_be_constant_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_const_enum_member_can_only_be_accessed_using_a_string_literal: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_does_not_exist_on_const_enum_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Export_declaration_conflicts_with_exported_declaration_of_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Invalid_left_hand_side_in_for_of_statement: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_iterator_must_have_a_next_method: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_redeclare_identifier_0_in_catch_clause: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_is_not_an_array_type_or_a_string_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_rest_element_cannot_contain_a_binding_pattern: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_find_namespace_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        No_best_common_type_exists_among_yield_expressions: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_generator_cannot_have_a_void_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_is_not_a_constructor_function_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        No_base_constructor_has_the_specified_number_of_type_arguments: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Base_constructor_return_type_0_is_not_a_class_or_interface_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Base_constructors_must_all_have_the_same_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_create_an_instance_of_the_abstract_class_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Overload_signatures_must_all_be_abstract_or_non_abstract: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Classes_containing_abstract_methods_must_be_marked_abstract: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        All_declarations_of_an_abstract_method_must_be_consecutive: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_function_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        yield_expressions_cannot_be_used_in_a_parameter_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        await_expressions_cannot_be_used_in_a_parameter_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_module_cannot_have_multiple_default_exports: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_is_incompatible_with_index_signature: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Object_is_possibly_null: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Object_is_possibly_undefined: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Object_is_possibly_null_or_undefined: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_function_returning_never_cannot_have_a_reachable_end_point: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_element_attributes_type_0_may_not_be_a_union_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_in_type_1_is_not_assignable_to_type_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_global_type_JSX_0_may_not_have_more_than_one_property: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_emit_namespaced_JSX_elements_in_React: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_expressions_must_have_one_parent_element: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_provides_no_match_for_the_signature_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Invalid_module_name_in_augmentation_module_0_cannot_be_found: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Accessors_must_both_be_abstract_or_non_abstract: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_0_is_not_comparable_to_type_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_this_parameter_must_be_the_first_parameter: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_constructor_cannot_have_a_this_parameter: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        get_and_set_accessor_must_have_the_same_this_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_this_types_of_each_signature_are_incompatible: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Identifier_0_must_be_imported_from_a_module: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        All_declarations_of_0_must_have_identical_modifiers: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Import_declaration_0_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Exported_variable_0_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Public_property_0_of_exported_class_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_of_exported_interface_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Return_type_of_exported_function_has_or_is_using_private_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_of_exported_function_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Exported_type_alias_0_has_or_is_using_private_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Default_export_of_the_module_has_or_is_using_private_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_current_host_does_not_support_the_0_option: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_find_the_common_subdirectory_path_for_the_input_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_read_file_0_Colon_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unsupported_file_encoding: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Failed_to_parse_file_0_Colon_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unknown_compiler_option_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Compiler_option_0_requires_a_value_of_type_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Could_not_write_file_0_Colon_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Option_0_cannot_be_specified_without_specifying_option_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Option_0_cannot_be_specified_with_option_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_tsconfig_json_file_is_already_defined_at_Colon_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_write_file_0_because_it_would_overwrite_input_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_specified_path_does_not_exist_Colon_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Option_paths_cannot_be_used_without_specifying_baseUrl_option: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Pattern_0_can_have_at_most_one_Asterisk_character: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Substitutions_for_pattern_0_should_be_an_array: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Concatenate_and_emit_output_to_single_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Generates_corresponding_d_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Watch_input_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Redirect_output_structure_to_the_directory: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_erase_const_enum_declarations_in_generated_code: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_emit_outputs_if_any_errors_were_reported: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_emit_comments_to_output: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_emit_outputs: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Skip_type_checking_of_declaration_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Print_this_message: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Print_the_compiler_s_version: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Compile_the_project_in_the_given_directory: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Syntax_Colon_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        options: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Examples_Colon_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Options_Colon: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Version_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Insert_command_line_options_and_files_from_a_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        File_change_detected_Starting_incremental_compilation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        KIND: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        FILE: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        VERSION: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        LOCATION: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        DIRECTORY: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Compilation_complete_Watching_for_file_changes: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Generates_corresponding_map_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Compiler_option_0_expects_an_argument: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unterminated_quoted_string_in_response_file_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Argument_for_0_option_must_be_Colon_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unsupported_locale_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unable_to_open_file_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Corrupted_locale_file_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        File_0_not_found: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        NEWLINE: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Option_0_can_only_be_specified_in_tsconfig_json_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Enables_experimental_support_for_ES7_decorators: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Enables_experimental_support_for_emitting_type_metadata_for_decorators: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Enables_experimental_support_for_ES7_async_functions: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Successfully_created_a_tsconfig_json_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Suppress_excess_property_checks_for_object_literals: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Stylize_errors_and_messages_using_color_and_context_experimental: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_report_errors_on_unused_labels: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Report_error_when_not_all_code_paths_in_function_return_a_value: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Report_errors_for_fallthrough_cases_in_switch_statement: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_report_errors_on_unreachable_code: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Disallow_inconsistently_cased_references_to_the_same_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Specify_library_files_to_be_included_in_the_compilation_Colon: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Specify_JSX_code_generation_Colon_preserve_or_react: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Only_amd_and_system_modules_are_supported_alongside_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Base_directory_to_resolve_non_absolute_module_names: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Enable_tracing_of_the_name_resolution_process: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Resolving_module_0_from_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Explicitly_specified_module_resolution_kind_Colon_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_resolution_kind_is_not_specified_using_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_name_0_was_successfully_resolved_to_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_name_0_was_not_resolved: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_name_0_matched_pattern_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Trying_substitution_0_candidate_module_location_Colon_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Resolving_module_name_0_relative_to_base_url_1_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Loading_module_as_file_Slash_folder_candidate_module_location_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        File_0_does_not_exist: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        File_0_exist_use_it_as_a_name_resolution_result: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Loading_module_0_from_node_modules_folder: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Found_package_json_at_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        package_json_does_not_have_types_field: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        package_json_has_0_field_1_that_references_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Allow_javascript_files_to_be_compiled: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Option_0_should_have_array_of_strings_as_a_value: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Checking_if_0_is_the_longest_matching_prefix_for_1_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Expected_type_of_0_field_in_package_json_to_be_string_got_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Longest_matching_prefix_for_0_is_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Loading_0_from_the_root_dir_1_candidate_location_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Trying_other_entries_in_rootDirs: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Module_resolution_using_rootDirs_has_failed: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Do_not_emit_use_strict_directives_in_module_output: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Enable_strict_null_checks: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unknown_option_excludes_Did_you_mean_exclude: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Raise_error_on_this_expressions_with_an_implied_any_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Resolving_using_primary_search_paths: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Resolving_from_node_modules_folder: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_reference_directive_0_was_not_resolved: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Resolving_with_primary_search_path_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Root_directory_cannot_be_determined_skipping_primary_search_paths: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Type_declaration_files_to_be_included_in_compilation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Looking_up_in_node_modules_folder_initial_location_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        The_config_file_0_found_doesn_t_contain_any_source_files: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Resolving_real_path_for_0_result_1: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        File_name_0_has_a_1_extension_stripping_it: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Variable_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Parameter_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Member_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Index_signature_of_object_type_implicitly_has_an_any_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Object_literal_s_property_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Rest_parameter_0_implicitly_has_an_any_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unreachable_code_detected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unused_label: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Fallthrough_case_in_switch: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Not_all_code_paths_return_a_value: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Binding_element_0_implicitly_has_an_1_type: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        You_cannot_rename_this_element: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        import_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        export_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        type_parameter_declarations_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        implements_clauses_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        interface_declarations_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        module_declarations_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        type_aliases_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        _0_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        types_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        type_arguments_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        parameter_modifiers_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        property_declarations_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        enum_declarations_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        type_assertion_expressions_can_only_be_used_in_a_ts_file: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        class_expressions_are_not_currently_supported: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_attributes_must_only_be_assigned_a_non_empty_expression: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Expected_corresponding_JSX_closing_tag_for_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_attribute_expected: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Cannot_use_JSX_unless_the_jsx_flag_is_provided: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        JSX_element_0_has_no_corresponding_closing_tag: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+        Unknown_typing_option_0: {
+            code: number;
+            category: DiagnosticCategory;
+            key: string;
+            message: string;
+        };
+    };
+}
+declare namespace ts {
+    interface ErrorCallback {
+        (message: DiagnosticMessage, length: number): void;
+    }
+    function tokenIsIdentifierOrKeyword(token: SyntaxKind): boolean;
+    interface Scanner {
+        getStartPos(): number;
+        getToken(): SyntaxKind;
+        getTextPos(): number;
+        getTokenPos(): number;
+        getTokenText(): string;
+        getTokenValue(): string;
+        hasExtendedUnicodeEscape(): boolean;
+        hasPrecedingLineBreak(): boolean;
+        isIdentifier(): boolean;
+        isReservedWord(): boolean;
+        isUnterminated(): boolean;
+        reScanGreaterToken(): SyntaxKind;
+        reScanSlashToken(): SyntaxKind;
+        reScanTemplateToken(): SyntaxKind;
+        scanJsxIdentifier(): SyntaxKind;
+        reScanJsxToken(): SyntaxKind;
+        scanJsxToken(): SyntaxKind;
+        scanJSDocToken(): SyntaxKind;
+        scan(): SyntaxKind;
+        setText(text: string, start?: number, length?: number): void;
+        setOnError(onError: ErrorCallback): void;
+        setScriptTarget(scriptTarget: ScriptTarget): void;
+        setLanguageVariant(variant: LanguageVariant): void;
+        setTextPos(textPos: number): void;
+        lookAhead<T>(callback: () => T): T;
+        scanRange<T>(start: number, length: number, callback: () => T): T;
+        tryScan<T>(callback: () => T): T;
+    }
+    function isUnicodeIdentifierStart(code: number, languageVersion: ScriptTarget): boolean;
+    function tokenToString(t: SyntaxKind): string;
+    function stringToToken(s: string): SyntaxKind;
+    function computeLineStarts(text: string): number[];
+    function getPositionOfLineAndCharacter(sourceFile: SourceFile, line: number, character: number): number;
+    function computePositionOfLineAndCharacter(lineStarts: number[], line: number, character: number): number;
+    function getLineStarts(sourceFile: SourceFile): number[];
+    function computeLineAndCharacterOfPosition(lineStarts: number[], position: number): {
+        line: number;
+        character: number;
+    };
+    function getLineAndCharacterOfPosition(sourceFile: SourceFile, position: number): LineAndCharacter;
+    function isWhiteSpace(ch: number): boolean;
+    function isLineBreak(ch: number): boolean;
+    function isOctalDigit(ch: number): boolean;
+    function couldStartTrivia(text: string, pos: number): boolean;
+    function skipTrivia(text: string, pos: number, stopAfterLineBreak?: boolean, stopAtComments?: boolean): number;
+    function getLeadingCommentRanges(text: string, pos: number): CommentRange[];
+    function getTrailingCommentRanges(text: string, pos: number): CommentRange[];
+    function getShebang(text: string): string;
+    function isIdentifierStart(ch: number, languageVersion: ScriptTarget): boolean;
+    function isIdentifierPart(ch: number, languageVersion: ScriptTarget): boolean;
+    function isIdentifier(name: string, languageVersion: ScriptTarget): boolean;
+    function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, text?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
+}
+declare namespace ts {
+    const optionDeclarations: CommandLineOption[];
+    let typingOptionDeclarations: CommandLineOption[];
+    interface OptionNameMap {
+        optionNameMap: Map<CommandLineOption>;
+        shortOptionNames: Map<string>;
+    }
+    function getOptionNameMap(): OptionNameMap;
+    function createCompilerDiagnosticForInvalidCustomType(opt: CommandLineOptionOfCustomType): Diagnostic;
+    function parseCustomTypeOption(opt: CommandLineOptionOfCustomType, value: string, errors: Diagnostic[]): number | string;
+    function parseListTypeOption(opt: CommandLineOptionOfListType, value: string, errors: Diagnostic[]): (string | number)[];
+    function parseCommandLine(commandLine: string[], readFile?: (path: string) => string): ParsedCommandLine;
+    function readConfigFile(fileName: string, readFile: (path: string) => string): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string): ParsedCommandLine;
+    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: CompilerOptions;
+        errors: Diagnostic[];
+    };
+    function convertTypingOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: CompilerOptions;
+        errors: Diagnostic[];
+    };
+}
+declare namespace ts {
+    interface ReferencePathMatchResult {
+        fileReference?: FileReference;
+        diagnosticMessage?: DiagnosticMessage;
+        isNoDefaultLib?: boolean;
+        isTypeReferenceDirective?: boolean;
+    }
+    interface SynthesizedNode extends Node {
+        leadingCommentRanges?: CommentRange[];
+        trailingCommentRanges?: CommentRange[];
+        startsOnNewLine: boolean;
+    }
+    function getDeclarationOfKind(symbol: Symbol, kind: SyntaxKind): Declaration;
+    interface StringSymbolWriter extends SymbolWriter {
+        string(): string;
+    }
+    interface EmitHost extends ScriptReferenceHost {
+        getSourceFiles(): SourceFile[];
+        getCommonSourceDirectory(): string;
+        getCanonicalFileName(fileName: string): string;
+        getNewLine(): string;
+        isEmitBlocked(emitFileName: string): boolean;
+        writeFile: WriteFileCallback;
+    }
+    function getSingleLineStringWriter(): StringSymbolWriter;
+    function releaseStringWriter(writer: StringSymbolWriter): void;
+    function getFullWidth(node: Node): number;
+    function mapIsEqualTo<T>(map1: Map<T>, map2: Map<T>): boolean;
+    function arrayIsEqualTo<T>(array1: T[], array2: T[], equaler?: (a: T, b: T) => boolean): boolean;
+    function hasResolvedModule(sourceFile: SourceFile, moduleNameText: string): boolean;
+    function getResolvedModule(sourceFile: SourceFile, moduleNameText: string): ResolvedModule;
+    function setResolvedModule(sourceFile: SourceFile, moduleNameText: string, resolvedModule: ResolvedModule): void;
+    function setResolvedTypeReferenceDirective(sourceFile: SourceFile, typeReferenceDirectiveName: string, resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective): void;
+    function moduleResolutionIsEqualTo(oldResolution: ResolvedModule, newResolution: ResolvedModule): boolean;
+    function typeDirectiveIsEqualTo(oldResolution: ResolvedTypeReferenceDirective, newResolution: ResolvedTypeReferenceDirective): boolean;
+    function hasChangesInResolutions<T>(names: string[], newResolutions: T[], oldResolutions: Map<T>, comparer: (oldResolution: T, newResolution: T) => boolean): boolean;
+    function containsParseError(node: Node): boolean;
+    function getSourceFileOfNode(node: Node): SourceFile;
+    function isStatementWithLocals(node: Node): boolean;
+    function getStartPositionOfLine(line: number, sourceFile: SourceFile): number;
+    function nodePosToString(node: Node): string;
+    function getStartPosOfNode(node: Node): number;
+    function getEndLinePosition(line: number, sourceFile: SourceFile): number;
+    function nodeIsMissing(node: Node): boolean;
+    function nodeIsPresent(node: Node): boolean;
+    function getTokenPosOfNode(node: Node, sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
+    function isJSDocNode(node: Node): boolean;
+    function getNonDecoratorTokenPosOfNode(node: Node, sourceFile?: SourceFile): number;
+    function getSourceTextOfNodeFromSourceFile(sourceFile: SourceFile, node: Node, includeTrivia?: boolean): string;
+    function getTextOfNodeFromSourceText(sourceText: string, node: Node): string;
+    function getTextOfNode(node: Node, includeTrivia?: boolean): string;
+    function escapeIdentifier(identifier: string): string;
+    function unescapeIdentifier(identifier: string): string;
+    function makeIdentifierFromModuleName(moduleName: string): string;
+    function isBlockOrCatchScoped(declaration: Declaration): boolean;
+    function isAmbientModule(node: Node): boolean;
+    function isBlockScopedContainerTopLevel(node: Node): boolean;
+    function isGlobalScopeAugmentation(module: ModuleDeclaration): boolean;
+    function isExternalModuleAugmentation(node: Node): boolean;
+    function getEnclosingBlockScopeContainer(node: Node): Node;
+    function isCatchClauseVariableDeclaration(declaration: Declaration): boolean;
+    function declarationNameToString(name: DeclarationName): string;
+    function createDiagnosticForNode(node: Node, message: DiagnosticMessage, arg0?: any, arg1?: any, arg2?: any): Diagnostic;
+    function createDiagnosticForNodeFromMessageChain(node: Node, messageChain: DiagnosticMessageChain): Diagnostic;
+    function getSpanOfTokenAtPosition(sourceFile: SourceFile, pos: number): TextSpan;
+    function getErrorSpanForNode(sourceFile: SourceFile, node: Node): TextSpan;
+    function isExternalOrCommonJsModule(file: SourceFile): boolean;
+    function isDeclarationFile(file: SourceFile): boolean;
+    function isConstEnumDeclaration(node: Node): boolean;
+    function getCombinedNodeFlags(node: Node): NodeFlags;
+    function isConst(node: Node): boolean;
+    function isLet(node: Node): boolean;
+    function isSuperCallExpression(n: Node): boolean;
+    function isPrologueDirective(node: Node): boolean;
+    function getLeadingCommentRangesOfNode(node: Node, sourceFileOfNode: SourceFile): CommentRange[];
+    function getLeadingCommentRangesOfNodeFromText(node: Node, text: string): CommentRange[];
+    function getJsDocComments(node: Node, sourceFileOfNode: SourceFile): CommentRange[];
+    function getJsDocCommentsFromText(node: Node, text: string): CommentRange[];
+    let fullTripleSlashReferencePathRegEx: RegExp;
+    let fullTripleSlashReferenceTypeReferenceDirectiveRegEx: RegExp;
+    let fullTripleSlashAMDReferencePathRegEx: RegExp;
+    function isTypeNode(node: Node): boolean;
+    function forEachReturnStatement<T>(body: Block, visitor: (stmt: ReturnStatement) => T): T;
+    function forEachYieldExpression(body: Block, visitor: (expr: YieldExpression) => void): void;
+    function isVariableLike(node: Node): node is VariableLikeDeclaration;
+    function isAccessor(node: Node): node is AccessorDeclaration;
+    function isClassLike(node: Node): node is ClassLikeDeclaration;
+    function isFunctionLike(node: Node): node is FunctionLikeDeclaration;
+    function isFunctionLikeKind(kind: SyntaxKind): boolean;
+    function introducesArgumentsExoticObject(node: Node): boolean;
+    function isIterationStatement(node: Node, lookInLabeledStatements: boolean): boolean;
+    function isFunctionBlock(node: Node): boolean;
+    function isObjectLiteralMethod(node: Node): node is MethodDeclaration;
+    function isIdentifierTypePredicate(predicate: TypePredicate): predicate is IdentifierTypePredicate;
+    function isThisTypePredicate(predicate: TypePredicate): predicate is ThisTypePredicate;
+    function getContainingFunction(node: Node): FunctionLikeDeclaration;
+    function getContainingClass(node: Node): ClassLikeDeclaration;
+    function getThisContainer(node: Node, includeArrowFunctions: boolean): Node;
+    function getSuperContainer(node: Node, stopOnFunctions: boolean): Node;
+    function getImmediatelyInvokedFunctionExpression(func: Node): CallExpression;
+    function isSuperPropertyOrElementAccess(node: Node): boolean;
+    function getEntityNameFromTypeNode(node: TypeNode): EntityName | Expression;
+    function getInvokedExpression(node: CallLikeExpression): Expression;
+    function nodeCanBeDecorated(node: Node): boolean;
+    function nodeIsDecorated(node: Node): boolean;
+    function isPropertyAccessExpression(node: Node): node is PropertyAccessExpression;
+    function isElementAccessExpression(node: Node): node is ElementAccessExpression;
+    function isJSXTagName(node: Node): boolean;
+    function isExpression(node: Node): boolean;
+    function isExternalModuleNameRelative(moduleName: string): boolean;
+    function isInstantiatedModule(node: ModuleDeclaration, preserveConstEnums: boolean): boolean;
+    function isExternalModuleImportEqualsDeclaration(node: Node): boolean;
+    function getExternalModuleImportEqualsDeclarationExpression(node: Node): Expression;
+    function isInternalModuleImportEqualsDeclaration(node: Node): node is ImportEqualsDeclaration;
+    function isSourceFileJavaScript(file: SourceFile): boolean;
+    function isInJavaScriptFile(node: Node): boolean;
+    function isRequireCall(expression: Node, checkArgumentIsStringLiteral: boolean): expression is CallExpression;
+    function isSingleOrDoubleQuote(charCode: number): boolean;
+    function getSpecialPropertyAssignmentKind(expression: Node): SpecialPropertyAssignmentKind;
+    function getExternalModuleName(node: Node): Expression;
+    function hasQuestionToken(node: Node): boolean;
+    function isJSDocConstructSignature(node: Node): boolean;
+    function getJSDocTypeTag(node: Node): JSDocTypeTag;
+    function getJSDocReturnTag(node: Node): JSDocReturnTag;
+    function getJSDocTemplateTag(node: Node): JSDocTemplateTag;
+    function getCorrespondingJSDocParameterTag(parameter: ParameterDeclaration): JSDocParameterTag;
+    function hasRestParameter(s: SignatureDeclaration): boolean;
+    function hasDeclaredRestParameter(s: SignatureDeclaration): boolean;
+    function isRestParameter(node: ParameterDeclaration): boolean;
+    function isDeclaredRestParam(node: ParameterDeclaration): boolean;
+    function isLiteralKind(kind: SyntaxKind): boolean;
+    function isTextualLiteralKind(kind: SyntaxKind): boolean;
+    function isTemplateLiteralKind(kind: SyntaxKind): boolean;
+    function isBindingPattern(node: Node): node is BindingPattern;
+    function isAssignmentTarget(node: Node): boolean;
+    function isNodeDescendentOf(node: Node, ancestor: Node): boolean;
+    function isInAmbientContext(node: Node): boolean;
+    function isDeclaration(node: Node): boolean;
+    function isStatement(n: Node): boolean;
+    function isClassElement(n: Node): boolean;
+    function isDeclarationName(name: Node): boolean;
+    function isLiteralComputedPropertyDeclarationName(node: Node): boolean;
+    function isIdentifierName(node: Identifier): boolean;
+    function isAliasSymbolDeclaration(node: Node): boolean;
+    function getClassExtendsHeritageClauseElement(node: ClassLikeDeclaration): ExpressionWithTypeArguments;
+    function getClassImplementsHeritageClauseElements(node: ClassLikeDeclaration): NodeArray<ExpressionWithTypeArguments>;
+    function getInterfaceBaseTypeNodes(node: InterfaceDeclaration): NodeArray<ExpressionWithTypeArguments>;
+    function getHeritageClause(clauses: NodeArray<HeritageClause>, kind: SyntaxKind): HeritageClause;
+    function tryResolveScriptReference(host: ScriptReferenceHost, sourceFile: SourceFile, reference: FileReference): SourceFile;
+    function getAncestor(node: Node, kind: SyntaxKind): Node;
+    function getFileReferenceFromReferencePath(comment: string, commentRange: CommentRange): ReferencePathMatchResult;
+    function isKeyword(token: SyntaxKind): boolean;
+    function isTrivia(token: SyntaxKind): boolean;
+    function isAsyncFunctionLike(node: Node): boolean;
+    function isStringOrNumericLiteral(kind: SyntaxKind): boolean;
+    function hasDynamicName(declaration: Declaration): boolean;
+    function isDynamicName(name: DeclarationName): boolean;
+    function isWellKnownSymbolSyntactically(node: Expression): boolean;
+    function getPropertyNameForPropertyNameNode(name: DeclarationName): string;
+    function getPropertyNameForKnownSymbolName(symbolName: string): string;
+    function isESSymbolIdentifier(node: Node): boolean;
+    function isModifierKind(token: SyntaxKind): boolean;
+    function isParameterDeclaration(node: VariableLikeDeclaration): boolean;
+    function getRootDeclaration(node: Node): Node;
+    function nodeStartsNewLexicalEnvironment(n: Node): boolean;
+    function cloneNode<T extends Node>(node: T, location?: TextRange, flags?: NodeFlags, parent?: Node): T;
+    function cloneEntityName(node: EntityName, parent?: Node): EntityName;
+    function isQualifiedName(node: Node): node is QualifiedName;
+    function nodeIsSynthesized(node: Node): boolean;
+    function createSynthesizedNode(kind: SyntaxKind, startsOnNewLine?: boolean): Node;
+    function createSynthesizedNodeArray(): NodeArray<any>;
+    function createDiagnosticCollection(): DiagnosticCollection;
+    function escapeString(s: string): string;
+    function isIntrinsicJsxName(name: string): boolean;
+    function escapeNonAsciiCharacters(s: string): string;
+    interface EmitTextWriter {
+        write(s: string): void;
+        writeTextOfNode(text: string, node: Node): void;
+        writeLine(): void;
+        increaseIndent(): void;
+        decreaseIndent(): void;
+        getText(): string;
+        rawWrite(s: string): void;
+        writeLiteral(s: string): void;
+        getTextPos(): number;
+        getLine(): number;
+        getColumn(): number;
+        getIndent(): number;
+        reset(): void;
+    }
+    function getIndentString(level: number): string;
+    function getIndentSize(): number;
+    function createTextWriter(newLine: String): EmitTextWriter;
+    function getExternalModuleNameFromPath(host: EmitHost, fileName: string): string;
+    function getOwnEmitOutputFilePath(sourceFile: SourceFile, host: EmitHost, extension: string): string;
+    function getDeclarationEmitOutputFilePath(sourceFile: SourceFile, host: EmitHost): string;
+    function getEmitScriptTarget(compilerOptions: CompilerOptions): ScriptTarget;
+    function getEmitModuleKind(compilerOptions: CompilerOptions): ModuleKind;
+    interface EmitFileNames {
+        jsFilePath: string;
+        sourceMapFilePath: string;
+        declarationFilePath: string;
+    }
+    function forEachExpectedEmitFile(host: EmitHost, action: (emitFileNames: EmitFileNames, sourceFiles: SourceFile[], isBundledEmit: boolean) => void, targetSourceFile?: SourceFile): void;
+    function getSourceFilePathInNewDir(sourceFile: SourceFile, host: EmitHost, newDirPath: string): string;
+    function writeFile(host: EmitHost, diagnostics: DiagnosticCollection, fileName: string, data: string, writeByteOrderMark: boolean, sourceFiles?: SourceFile[]): void;
+    function getLineOfLocalPosition(currentSourceFile: SourceFile, pos: number): number;
+    function getLineOfLocalPositionFromLineMap(lineMap: number[], pos: number): number;
+    function getFirstConstructorWithBody(node: ClassLikeDeclaration): ConstructorDeclaration;
+    function getSetAccessorTypeAnnotationNode(accessor: AccessorDeclaration): TypeNode;
+    function getAllAccessorDeclarations(declarations: NodeArray<Declaration>, accessor: AccessorDeclaration): {
+        firstAccessor: AccessorDeclaration;
+        secondAccessor: AccessorDeclaration;
+        getAccessor: AccessorDeclaration;
+        setAccessor: AccessorDeclaration;
+    };
+    function emitNewLineBeforeLeadingComments(lineMap: number[], writer: EmitTextWriter, node: TextRange, leadingComments: CommentRange[]): void;
+    function emitComments(text: string, lineMap: number[], writer: EmitTextWriter, comments: CommentRange[], trailingSeparator: boolean, newLine: string, writeComment: (text: string, lineMap: number[], writer: EmitTextWriter, comment: CommentRange, newLine: string) => void): void;
+    function emitDetachedComments(text: string, lineMap: number[], writer: EmitTextWriter, writeComment: (text: string, lineMap: number[], writer: EmitTextWriter, comment: CommentRange, newLine: string) => void, node: TextRange, newLine: string, removeComments: boolean): {
+        nodePos: number;
+        detachedCommentEndPos: number;
+    };
+    function writeCommentRange(text: string, lineMap: number[], writer: EmitTextWriter, comment: CommentRange, newLine: string): void;
+    function modifierToFlag(token: SyntaxKind): NodeFlags;
+    function isLeftHandSideExpression(expr: Expression): boolean;
+    function isAssignmentOperator(token: SyntaxKind): boolean;
+    function isExpressionWithTypeArgumentsInClassExtendsClause(node: Node): boolean;
+    function isSupportedExpressionWithTypeArguments(node: ExpressionWithTypeArguments): boolean;
+    function isRightSideOfQualifiedNameOrPropertyAccess(node: Node): boolean;
+    function isEmptyObjectLiteralOrArrayLiteral(expression: Node): boolean;
+    function getLocalSymbolForExportDefault(symbol: Symbol): Symbol;
+    function hasJavaScriptFileExtension(fileName: string): boolean;
+    const stringify: (value: any) => string;
+    function convertToBase64(input: string): string;
+    function convertToRelativePath(absoluteOrRelativePath: string, basePath: string, getCanonicalFileName: (path: string) => string): string;
+    function getNewLineCharacter(options: CompilerOptions): string;
+    function isWatchSet(options: CompilerOptions): boolean;
+}
+declare namespace ts {
+    function getDefaultLibFileName(options: CompilerOptions): string;
+    function textSpanEnd(span: TextSpan): number;
+    function textSpanIsEmpty(span: TextSpan): boolean;
+    function textSpanContainsPosition(span: TextSpan, position: number): boolean;
+    function textSpanContainsTextSpan(span: TextSpan, other: TextSpan): boolean;
+    function textSpanOverlapsWith(span: TextSpan, other: TextSpan): boolean;
+    function textSpanOverlap(span1: TextSpan, span2: TextSpan): TextSpan;
+    function textSpanIntersectsWithTextSpan(span: TextSpan, other: TextSpan): boolean;
+    function textSpanIntersectsWith(span: TextSpan, start: number, length: number): boolean;
+    function decodedTextSpanIntersectsWith(start1: number, length1: number, start2: number, length2: number): boolean;
+    function textSpanIntersectsWithPosition(span: TextSpan, position: number): boolean;
+    function textSpanIntersection(span1: TextSpan, span2: TextSpan): TextSpan;
+    function createTextSpan(start: number, length: number): TextSpan;
+    function createTextSpanFromBounds(start: number, end: number): TextSpan;
+    function textChangeRangeNewSpan(range: TextChangeRange): TextSpan;
+    function textChangeRangeIsUnchanged(range: TextChangeRange): boolean;
+    function createTextChangeRange(span: TextSpan, newLength: number): TextChangeRange;
+    let unchangedTextChangeRange: TextChangeRange;
+    function collapseTextChangeRangesAcrossMultipleVersions(changes: TextChangeRange[]): TextChangeRange;
+    function getTypeParameterOwner(d: Declaration): Declaration;
+    function isParameterPropertyDeclaration(node: ParameterDeclaration): boolean;
+    function startsWith(str: string, prefix: string): boolean;
+    function endsWith(str: string, suffix: string): boolean;
+}
+declare namespace ts {
+    let parseTime: number;
+    function createNode(kind: SyntaxKind, pos?: number, end?: number): Node;
+    function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodeArray?: (nodes: Node[]) => T): T;
+    function createSourceFile(fileName: string, sourceText: string, languageVersion: ScriptTarget, setParentNodes?: boolean, scriptKind?: ScriptKind): SourceFile;
+    function isExternalModule(file: SourceFile): boolean;
+    function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
+    function parseIsolatedJSDocComment(content: string, start?: number, length?: number): {
+        jsDocComment: JSDocComment;
+        diagnostics: Diagnostic[];
+    };
+    function parseJSDocTypeExpressionForTests(content: string, start?: number, length?: number): {
+        jsDocTypeExpression: JSDocTypeExpression;
+        diagnostics: Diagnostic[];
+    };
+}
+declare namespace ts {
+    let bindTime: number;
+    const enum ModuleInstanceState {
+        NonInstantiated = 0,
+        Instantiated = 1,
+        ConstEnumOnly = 2,
+    }
+    function getModuleInstanceState(node: Node): ModuleInstanceState;
+    function bindSourceFile(file: SourceFile, options: CompilerOptions): void;
+}
+declare namespace ts {
+    function getNodeId(node: Node): number;
+    let checkTime: number;
+    function getSymbolId(symbol: Symbol): number;
+    function createTypeChecker(host: TypeCheckerHost, produceDiagnostics: boolean): TypeChecker;
+}
+declare namespace ts {
+    interface SourceMapWriter {
+        getSourceMapData(): SourceMapData;
+        setSourceFile(sourceFile: SourceFile): void;
+        emitPos(pos: number): void;
+        emitStart(range: TextRange): void;
+        emitEnd(range: TextRange, stopOverridingSpan?: boolean): void;
+        changeEmitSourcePos(): void;
+        getText(): string;
+        getSourceMappingURL(): string;
+        initialize(filePath: string, sourceMapFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean): void;
+        reset(): void;
+    }
+    function getNullSourceMapWriter(): SourceMapWriter;
+    function createSourceMapWriter(host: EmitHost, writer: EmitTextWriter): SourceMapWriter;
+}
+declare namespace ts {
+    function getDeclarationDiagnostics(host: EmitHost, resolver: EmitResolver, targetSourceFile: SourceFile): Diagnostic[];
+    function writeDeclarationFile(declarationFilePath: string, sourceFiles: SourceFile[], isBundledEmit: boolean, host: EmitHost, resolver: EmitResolver, emitterDiagnostics: DiagnosticCollection): boolean;
+}
+declare namespace ts {
+    function getResolvedExternalModuleName(host: EmitHost, file: SourceFile): string;
+    function getExternalModuleNameFromDeclaration(host: EmitHost, resolver: EmitResolver, declaration: ImportEqualsDeclaration | ImportDeclaration | ExportDeclaration): string;
+    function emitFiles(resolver: EmitResolver, host: EmitHost, targetSourceFile: SourceFile): EmitResult;
+}
+declare namespace ts {
+    let programTime: number;
+    let emitTime: number;
+    let ioReadTime: number;
+    let ioWriteTime: number;
+    const version: string;
+    function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean): string;
+    function resolveTripleslashReference(moduleName: string, containingFile: string): string;
+    function computeCommonSourceDirectoryOfFilenames(fileNames: string[], currentDirectory: string, getCanonicalFileName: (fileName: string) => string): string;
+    function hasZeroOrOneAsteriskCharacter(str: string): boolean;
+    function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string, options: CompilerOptions, host: ModuleResolutionHost): ResolvedTypeReferenceDirectiveWithFailedLookupLocations;
+    function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
+    function findBestPatternMatch<T>(values: T[], getPattern: (value: T) => Pattern, candidate: string): T | undefined;
+    function tryParsePattern(pattern: string): Pattern | undefined;
+    function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
+    function directoryProbablyExists(directoryName: string, host: {
+        directoryExists?: (directoryName: string) => boolean;
+    }): boolean;
+    function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
+    const defaultInitCompilerOptions: CompilerOptions;
+    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
+    function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+    function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
+    function getDefaultTypeDirectiveNames(options: CompilerOptions, rootFiles: string[], host: CompilerHost): string[];
+    function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program;
+}
+declare namespace ts.BreakpointResolver {
+    function spanInSourceFileAtLocation(sourceFile: SourceFile, position: number): TextSpan;
+}
+declare namespace ts.OutliningElementsCollector {
+    function collectElements(sourceFile: SourceFile): OutliningSpan[];
+}
+declare namespace ts.NavigateTo {
+    function getNavigateToItems(program: Program, checker: TypeChecker, cancellationToken: CancellationToken, searchValue: string, maxResultCount: number): NavigateToItem[];
+}
+declare namespace ts.NavigationBar {
+    function getNavigationBarItems(sourceFile: SourceFile, compilerOptions: CompilerOptions): ts.NavigationBarItem[];
+    function getJsNavigationBarItems(sourceFile: SourceFile, compilerOptions: CompilerOptions): NavigationBarItem[];
+}
+declare namespace ts {
+    enum PatternMatchKind {
+        exact = 0,
+        prefix = 1,
+        substring = 2,
+        camelCase = 3,
+    }
+    interface PatternMatch {
+        kind: PatternMatchKind;
+        camelCaseWeight?: number;
+        isCaseSensitive: boolean;
+        punctuationStripped: boolean;
+    }
+    interface PatternMatcher {
+        getMatchesForLastSegmentOfPattern(candidate: string): PatternMatch[];
+        getMatches(candidateContainers: string[], candidate: string): PatternMatch[];
+        patternContainsDots: boolean;
+    }
+    function createPatternMatcher(pattern: string): PatternMatcher;
+    function breakIntoCharacterSpans(identifier: string): TextSpan[];
+    function breakIntoWordSpans(identifier: string): TextSpan[];
+}
+declare namespace ts.SignatureHelp {
+    const enum ArgumentListKind {
+        TypeArguments = 0,
+        CallArguments = 1,
+        TaggedTemplateArguments = 2,
+    }
+    interface ArgumentListInfo {
+        kind: ArgumentListKind;
+        invocation: CallLikeExpression;
+        argumentsSpan: TextSpan;
+        argumentIndex?: number;
+        argumentCount: number;
+    }
+    function getSignatureHelpItems(program: Program, sourceFile: SourceFile, position: number, cancellationToken: CancellationToken): SignatureHelpItems;
+    function getContainingArgumentInfo(node: Node, position: number, sourceFile: SourceFile): ArgumentListInfo;
+}
+declare namespace ts {
+    interface ListItemInfo {
+        listItemIndex: number;
+        list: Node;
+    }
+    function getLineStartPositionForPosition(position: number, sourceFile: SourceFile): number;
+    function rangeContainsRange(r1: TextRange, r2: TextRange): boolean;
+    function startEndContainsRange(start: number, end: number, range: TextRange): boolean;
+    function rangeContainsStartEnd(range: TextRange, start: number, end: number): boolean;
+    function rangeOverlapsWithStartEnd(r1: TextRange, start: number, end: number): boolean;
+    function startEndOverlapsWithStartEnd(start1: number, end1: number, start2: number, end2: number): boolean;
+    function positionBelongsToNode(candidate: Node, position: number, sourceFile: SourceFile): boolean;
+    function isCompletedNode(n: Node, sourceFile: SourceFile): boolean;
+    function findListItemInfo(node: Node): ListItemInfo;
+    function hasChildOfKind(n: Node, kind: SyntaxKind, sourceFile?: SourceFile): boolean;
+    function findChildOfKind(n: Node, kind: SyntaxKind, sourceFile?: SourceFile): Node;
+    function findContainingList(node: Node): Node;
+    function getTouchingWord(sourceFile: SourceFile, position: number, includeJsDocComment?: boolean): Node;
+    function getTouchingPropertyName(sourceFile: SourceFile, position: number, includeJsDocComment?: boolean): Node;
+    function getTouchingToken(sourceFile: SourceFile, position: number, includeItemAtEndPosition?: (n: Node) => boolean, includeJsDocComment?: boolean): Node;
+    function getTokenAtPosition(sourceFile: SourceFile, position: number, includeJsDocComment?: boolean): Node;
+    function findTokenOnLeftOfPosition(file: SourceFile, position: number): Node;
+    function findNextToken(previousToken: Node, parent: Node): Node;
+    function findPrecedingToken(position: number, sourceFile: SourceFile, startNode?: Node): Node;
+    function isInString(sourceFile: SourceFile, position: number): boolean;
+    function isInComment(sourceFile: SourceFile, position: number): boolean;
+    function isInsideJsxElementOrAttribute(sourceFile: SourceFile, position: number): boolean;
+    function isInTemplateString(sourceFile: SourceFile, position: number): boolean;
+    function isInCommentHelper(sourceFile: SourceFile, position: number, predicate?: (c: CommentRange) => boolean): boolean;
+    function hasDocComment(sourceFile: SourceFile, position: number): boolean;
+    function getJsDocTagAtPosition(sourceFile: SourceFile, position: number): JSDocTag;
+    function getNodeModifiers(node: Node): string;
+    function getTypeArgumentOrTypeParameterList(node: Node): NodeArray<Node>;
+    function isToken(n: Node): boolean;
+    function isWord(kind: SyntaxKind): boolean;
+    function isComment(kind: SyntaxKind): boolean;
+    function isStringOrRegularExpressionOrTemplateLiteral(kind: SyntaxKind): boolean;
+    function isPunctuation(kind: SyntaxKind): boolean;
+    function isInsideTemplateLiteral(node: LiteralExpression, position: number): boolean;
+    function isAccessibilityModifier(kind: SyntaxKind): boolean;
+    function compareDataObjects(dst: any, src: any): boolean;
+    function isArrayLiteralOrObjectLiteralDestructuringPattern(node: Node): boolean;
+}
+declare namespace ts {
+    function isFirstDeclarationOfSymbolParameter(symbol: Symbol): boolean;
+    function symbolPart(text: string, symbol: Symbol): SymbolDisplayPart;
+    function displayPart(text: string, kind: SymbolDisplayPartKind, symbol?: Symbol): SymbolDisplayPart;
+    function spacePart(): SymbolDisplayPart;
+    function keywordPart(kind: SyntaxKind): SymbolDisplayPart;
+    function punctuationPart(kind: SyntaxKind): SymbolDisplayPart;
+    function operatorPart(kind: SyntaxKind): SymbolDisplayPart;
+    function textOrKeywordPart(text: string): SymbolDisplayPart;
+    function textPart(text: string): SymbolDisplayPart;
+    function getNewLineOrDefaultFromHost(host: LanguageServiceHost | LanguageServiceShimHost): string;
+    function lineBreakPart(): SymbolDisplayPart;
+    function mapToDisplayParts(writeDisplayParts: (writer: DisplayPartsSymbolWriter) => void): SymbolDisplayPart[];
+    function typeToDisplayParts(typechecker: TypeChecker, type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): SymbolDisplayPart[];
+    function symbolToDisplayParts(typeChecker: TypeChecker, symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): SymbolDisplayPart[];
+    function signatureToDisplayParts(typechecker: TypeChecker, signature: Signature, enclosingDeclaration?: Node, flags?: TypeFormatFlags): SymbolDisplayPart[];
+    function getDeclaredName(typeChecker: TypeChecker, symbol: Symbol, location: Node): string;
+    function isImportOrExportSpecifierName(location: Node): boolean;
+    function stripQuotes(name: string): string;
+    function scriptKindIs(fileName: string, host: LanguageServiceHost, ...scriptKinds: ScriptKind[]): boolean;
+    function getScriptKind(fileName: string, host?: LanguageServiceHost): ScriptKind;
+}
+declare namespace ts.JsTyping {
+    interface TypingResolutionHost {
+        directoryExists: (path: string) => boolean;
+        fileExists: (fileName: string) => boolean;
+        readFile: (path: string, encoding?: string) => string;
+        readDirectory: (path: string, extension?: string, exclude?: string[], depth?: number) => string[];
+    }
+    function discoverTypings(host: TypingResolutionHost, fileNames: string[], projectRootPath: Path, safeListPath: Path, packageNameToTypingLocation: Map<string>, typingOptions: TypingOptions, compilerOptions: CompilerOptions): {
+        cachedTypingPaths: string[];
+        newTypingNames: string[];
+        filesToWatch: string[];
+    };
+}
+declare namespace ts.formatting {
+    interface FormattingScanner {
+        advance(): void;
+        isOnToken(): boolean;
+        readTokenInfo(n: Node): TokenInfo;
+        getCurrentLeadingTrivia(): TextRangeWithKind[];
+        lastTrailingTriviaWasNewLine(): boolean;
+        close(): void;
+    }
+    function getFormattingScanner(sourceFile: SourceFile, startPos: number, endPos: number): FormattingScanner;
+}
+declare namespace ts.formatting {
+    class FormattingContext {
+        sourceFile: SourceFile;
+        formattingRequestKind: FormattingRequestKind;
+        currentTokenSpan: TextRangeWithKind;
+        nextTokenSpan: TextRangeWithKind;
+        contextNode: Node;
+        currentTokenParent: Node;
+        nextTokenParent: Node;
+        private contextNodeAllOnSameLine;
+        private nextNodeAllOnSameLine;
+        private tokensAreOnSameLine;
+        private contextNodeBlockIsOnOneLine;
+        private nextNodeBlockIsOnOneLine;
+        constructor(sourceFile: SourceFile, formattingRequestKind: FormattingRequestKind);
+        updateContext(currentRange: TextRangeWithKind, currentTokenParent: Node, nextRange: TextRangeWithKind, nextTokenParent: Node, commonParent: Node): void;
+        ContextNodeAllOnSameLine(): boolean;
+        NextNodeAllOnSameLine(): boolean;
+        TokensAreOnSameLine(): boolean;
+        ContextNodeBlockIsOnOneLine(): boolean;
+        NextNodeBlockIsOnOneLine(): boolean;
+        private NodeIsOnOneLine(node);
+        private BlockIsOnOneLine(node);
+    }
+}
+declare namespace ts.formatting {
+    const enum FormattingRequestKind {
+        FormatDocument = 0,
+        FormatSelection = 1,
+        FormatOnEnter = 2,
+        FormatOnSemicolon = 3,
+        FormatOnClosingCurlyBrace = 4,
+    }
+}
+declare namespace ts.formatting {
+    class Rule {
+        Descriptor: RuleDescriptor;
+        Operation: RuleOperation;
+        Flag: RuleFlags;
+        constructor(Descriptor: RuleDescriptor, Operation: RuleOperation, Flag?: RuleFlags);
+        toString(): string;
+    }
+}
+declare namespace ts.formatting {
+    const enum RuleAction {
+        Ignore = 1,
+        Space = 2,
+        NewLine = 4,
+        Delete = 8,
+    }
+}
+declare namespace ts.formatting {
+    class RuleDescriptor {
+        LeftTokenRange: Shared.TokenRange;
+        RightTokenRange: Shared.TokenRange;
+        constructor(LeftTokenRange: Shared.TokenRange, RightTokenRange: Shared.TokenRange);
+        toString(): string;
+        static create1(left: SyntaxKind, right: SyntaxKind): RuleDescriptor;
+        static create2(left: Shared.TokenRange, right: SyntaxKind): RuleDescriptor;
+        static create3(left: SyntaxKind, right: Shared.TokenRange): RuleDescriptor;
+        static create4(left: Shared.TokenRange, right: Shared.TokenRange): RuleDescriptor;
+    }
+}
+declare namespace ts.formatting {
+    const enum RuleFlags {
+        None = 0,
+        CanDeleteNewLines = 1,
+    }
+}
+declare namespace ts.formatting {
+    class RuleOperation {
+        Context: RuleOperationContext;
+        Action: RuleAction;
+        constructor(Context: RuleOperationContext, Action: RuleAction);
+        toString(): string;
+        static create1(action: RuleAction): RuleOperation;
+        static create2(context: RuleOperationContext, action: RuleAction): RuleOperation;
+    }
+}
+declare namespace ts.formatting {
+    class RuleOperationContext {
+        private customContextChecks;
+        constructor(...funcs: {
+            (context: FormattingContext): boolean;
+        }[]);
+        static Any: RuleOperationContext;
+        IsAny(): boolean;
+        InContext(context: FormattingContext): boolean;
+    }
+}
+declare namespace ts.formatting {
+    class Rules {
+        getRuleName(rule: Rule): string;
+        [name: string]: any;
+        IgnoreBeforeComment: Rule;
+        IgnoreAfterLineComment: Rule;
+        NoSpaceBeforeSemicolon: Rule;
+        NoSpaceBeforeColon: Rule;
+        NoSpaceBeforeQuestionMark: Rule;
+        SpaceAfterColon: Rule;
+        SpaceAfterQuestionMarkInConditionalOperator: Rule;
+        NoSpaceAfterQuestionMark: Rule;
+        SpaceAfterSemicolon: Rule;
+        SpaceAfterCloseBrace: Rule;
+        SpaceBetweenCloseBraceAndElse: Rule;
+        SpaceBetweenCloseBraceAndWhile: Rule;
+        NoSpaceAfterCloseBrace: Rule;
+        NoSpaceBeforeDot: Rule;
+        NoSpaceAfterDot: Rule;
+        NoSpaceBeforeOpenBracket: Rule;
+        NoSpaceAfterCloseBracket: Rule;
+        SpaceAfterOpenBrace: Rule;
+        SpaceBeforeCloseBrace: Rule;
+        NoSpaceBetweenEmptyBraceBrackets: Rule;
+        NewLineAfterOpenBraceInBlockContext: Rule;
+        NewLineBeforeCloseBraceInBlockContext: Rule;
+        NoSpaceAfterUnaryPrefixOperator: Rule;
+        NoSpaceAfterUnaryPreincrementOperator: Rule;
+        NoSpaceAfterUnaryPredecrementOperator: Rule;
+        NoSpaceBeforeUnaryPostincrementOperator: Rule;
+        NoSpaceBeforeUnaryPostdecrementOperator: Rule;
+        SpaceAfterPostincrementWhenFollowedByAdd: Rule;
+        SpaceAfterAddWhenFollowedByUnaryPlus: Rule;
+        SpaceAfterAddWhenFollowedByPreincrement: Rule;
+        SpaceAfterPostdecrementWhenFollowedBySubtract: Rule;
+        SpaceAfterSubtractWhenFollowedByUnaryMinus: Rule;
+        SpaceAfterSubtractWhenFollowedByPredecrement: Rule;
+        NoSpaceBeforeComma: Rule;
+        SpaceAfterCertainKeywords: Rule;
+        SpaceAfterLetConstInVariableDeclaration: Rule;
+        NoSpaceBeforeOpenParenInFuncCall: Rule;
+        SpaceAfterFunctionInFuncDecl: Rule;
+        NoSpaceBeforeOpenParenInFuncDecl: Rule;
+        SpaceAfterVoidOperator: Rule;
+        NoSpaceBetweenReturnAndSemicolon: Rule;
+        SpaceBetweenStatements: Rule;
+        SpaceAfterTryFinally: Rule;
+        SpaceAfterGetSetInMember: Rule;
+        SpaceBeforeBinaryKeywordOperator: Rule;
+        SpaceAfterBinaryKeywordOperator: Rule;
+        NoSpaceAfterConstructor: Rule;
+        NoSpaceAfterModuleImport: Rule;
+        SpaceAfterCertainTypeScriptKeywords: Rule;
+        SpaceBeforeCertainTypeScriptKeywords: Rule;
+        SpaceAfterModuleName: Rule;
+        SpaceBeforeArrow: Rule;
+        SpaceAfterArrow: Rule;
+        NoSpaceAfterEllipsis: Rule;
+        NoSpaceAfterOptionalParameters: Rule;
+        NoSpaceBeforeOpenAngularBracket: Rule;
+        NoSpaceBetweenCloseParenAndAngularBracket: Rule;
+        NoSpaceAfterOpenAngularBracket: Rule;
+        NoSpaceBeforeCloseAngularBracket: Rule;
+        NoSpaceAfterCloseAngularBracket: Rule;
+        NoSpaceAfterTypeAssertion: Rule;
+        NoSpaceBetweenEmptyInterfaceBraceBrackets: Rule;
+        HighPriorityCommonRules: Rule[];
+        LowPriorityCommonRules: Rule[];
+        SpaceAfterComma: Rule;
+        NoSpaceAfterComma: Rule;
+        SpaceBeforeBinaryOperator: Rule;
+        SpaceAfterBinaryOperator: Rule;
+        NoSpaceBeforeBinaryOperator: Rule;
+        NoSpaceAfterBinaryOperator: Rule;
+        SpaceAfterKeywordInControl: Rule;
+        NoSpaceAfterKeywordInControl: Rule;
+        FunctionOpenBraceLeftTokenRange: Shared.TokenRange;
+        SpaceBeforeOpenBraceInFunction: Rule;
+        NewLineBeforeOpenBraceInFunction: Rule;
+        TypeScriptOpenBraceLeftTokenRange: Shared.TokenRange;
+        SpaceBeforeOpenBraceInTypeScriptDeclWithBlock: Rule;
+        NewLineBeforeOpenBraceInTypeScriptDeclWithBlock: Rule;
+        ControlOpenBraceLeftTokenRange: Shared.TokenRange;
+        SpaceBeforeOpenBraceInControl: Rule;
+        NewLineBeforeOpenBraceInControl: Rule;
+        SpaceAfterSemicolonInFor: Rule;
+        NoSpaceAfterSemicolonInFor: Rule;
+        SpaceAfterOpenParen: Rule;
+        SpaceBeforeCloseParen: Rule;
+        NoSpaceBetweenParens: Rule;
+        NoSpaceAfterOpenParen: Rule;
+        NoSpaceBeforeCloseParen: Rule;
+        SpaceAfterOpenBracket: Rule;
+        SpaceBeforeCloseBracket: Rule;
+        NoSpaceBetweenBrackets: Rule;
+        NoSpaceAfterOpenBracket: Rule;
+        NoSpaceBeforeCloseBracket: Rule;
+        SpaceAfterAnonymousFunctionKeyword: Rule;
+        NoSpaceAfterAnonymousFunctionKeyword: Rule;
+        SpaceBeforeAt: Rule;
+        NoSpaceAfterAt: Rule;
+        SpaceAfterDecorator: Rule;
+        NoSpaceBetweenFunctionKeywordAndStar: Rule;
+        SpaceAfterStarInGeneratorDeclaration: Rule;
+        NoSpaceBetweenYieldKeywordAndStar: Rule;
+        SpaceBetweenYieldOrYieldStarAndOperand: Rule;
+        SpaceBetweenAsyncAndOpenParen: Rule;
+        SpaceBetweenAsyncAndFunctionKeyword: Rule;
+        NoSpaceBetweenTagAndTemplateString: Rule;
+        NoSpaceAfterTemplateHeadAndMiddle: Rule;
+        SpaceAfterTemplateHeadAndMiddle: Rule;
+        NoSpaceBeforeTemplateMiddleAndTail: Rule;
+        SpaceBeforeTemplateMiddleAndTail: Rule;
+        constructor();
+        static IsForContext(context: FormattingContext): boolean;
+        static IsNotForContext(context: FormattingContext): boolean;
+        static IsBinaryOpContext(context: FormattingContext): boolean;
+        static IsNotBinaryOpContext(context: FormattingContext): boolean;
+        static IsConditionalOperatorContext(context: FormattingContext): boolean;
+        static IsSameLineTokenOrBeforeMultilineBlockContext(context: FormattingContext): boolean;
+        static IsBeforeMultilineBlockContext(context: FormattingContext): boolean;
+        static IsMultilineBlockContext(context: FormattingContext): boolean;
+        static IsSingleLineBlockContext(context: FormattingContext): boolean;
+        static IsBlockContext(context: FormattingContext): boolean;
+        static IsBeforeBlockContext(context: FormattingContext): boolean;
+        static NodeIsBlockContext(node: Node): boolean;
+        static IsFunctionDeclContext(context: FormattingContext): boolean;
+        static IsFunctionDeclarationOrFunctionExpressionContext(context: FormattingContext): boolean;
+        static IsTypeScriptDeclWithBlockContext(context: FormattingContext): boolean;
+        static NodeIsTypeScriptDeclWithBlockContext(node: Node): boolean;
+        static IsAfterCodeBlockContext(context: FormattingContext): boolean;
+        static IsControlDeclContext(context: FormattingContext): boolean;
+        static IsObjectContext(context: FormattingContext): boolean;
+        static IsFunctionCallContext(context: FormattingContext): boolean;
+        static IsNewContext(context: FormattingContext): boolean;
+        static IsFunctionCallOrNewContext(context: FormattingContext): boolean;
+        static IsPreviousTokenNotComma(context: FormattingContext): boolean;
+        static IsNextTokenNotCloseBracket(context: FormattingContext): boolean;
+        static IsArrowFunctionContext(context: FormattingContext): boolean;
+        static IsNonJsxSameLineTokenContext(context: FormattingContext): boolean;
+        static IsNotBeforeBlockInFunctionDeclarationContext(context: FormattingContext): boolean;
+        static IsEndOfDecoratorContextOnSameLine(context: FormattingContext): boolean;
+        static NodeIsInDecoratorContext(node: Node): boolean;
+        static IsStartOfVariableDeclarationList(context: FormattingContext): boolean;
+        static IsNotFormatOnEnter(context: FormattingContext): boolean;
+        static IsModuleDeclContext(context: FormattingContext): boolean;
+        static IsObjectTypeContext(context: FormattingContext): boolean;
+        static IsTypeArgumentOrParameterOrAssertion(token: TextRangeWithKind, parent: Node): boolean;
+        static IsTypeArgumentOrParameterOrAssertionContext(context: FormattingContext): boolean;
+        static IsTypeAssertionContext(context: FormattingContext): boolean;
+        static IsVoidOpContext(context: FormattingContext): boolean;
+        static IsYieldOrYieldStarWithOperand(context: FormattingContext): boolean;
+    }
+}
+declare namespace ts.formatting {
+    class RulesMap {
+        map: RulesBucket[];
+        mapRowLength: number;
+        constructor();
+        static create(rules: Rule[]): RulesMap;
+        Initialize(rules: Rule[]): RulesBucket[];
+        FillRules(rules: Rule[], rulesBucketConstructionStateList: RulesBucketConstructionState[]): void;
+        private GetRuleBucketIndex(row, column);
+        private FillRule(rule, rulesBucketConstructionStateList);
+        GetRule(context: FormattingContext): Rule;
+    }
+    enum RulesPosition {
+        IgnoreRulesSpecific = 0,
+        IgnoreRulesAny,
+        ContextRulesSpecific,
+        ContextRulesAny,
+        NoContextRulesSpecific,
+        NoContextRulesAny,
+    }
+    class RulesBucketConstructionState {
+        private rulesInsertionIndexBitmap;
+        constructor();
+        GetInsertionIndex(maskPosition: RulesPosition): number;
+        IncreaseInsertionIndex(maskPosition: RulesPosition): void;
+    }
+    class RulesBucket {
+        private rules;
+        constructor();
+        Rules(): Rule[];
+        AddRule(rule: Rule, specificTokens: boolean, constructionState: RulesBucketConstructionState[], rulesBucketIndex: number): void;
+    }
+}
+declare namespace ts.formatting {
+    namespace Shared {
+        interface ITokenAccess {
+            GetTokens(): SyntaxKind[];
+            Contains(token: SyntaxKind): boolean;
+        }
+        class TokenRangeAccess implements ITokenAccess {
+            private tokens;
+            constructor(from: SyntaxKind, to: SyntaxKind, except: SyntaxKind[]);
+            GetTokens(): SyntaxKind[];
+            Contains(token: SyntaxKind): boolean;
+        }
+        class TokenValuesAccess implements ITokenAccess {
+            private tokens;
+            constructor(tks: SyntaxKind[]);
+            GetTokens(): SyntaxKind[];
+            Contains(token: SyntaxKind): boolean;
+        }
+        class TokenSingleValueAccess implements ITokenAccess {
+            token: SyntaxKind;
+            constructor(token: SyntaxKind);
+            GetTokens(): SyntaxKind[];
+            Contains(tokenValue: SyntaxKind): boolean;
+        }
+        class TokenAllAccess implements ITokenAccess {
+            GetTokens(): SyntaxKind[];
+            Contains(tokenValue: SyntaxKind): boolean;
+            toString(): string;
+        }
+        class TokenRange {
+            tokenAccess: ITokenAccess;
+            constructor(tokenAccess: ITokenAccess);
+            static FromToken(token: SyntaxKind): TokenRange;
+            static FromTokens(tokens: SyntaxKind[]): TokenRange;
+            static FromRange(f: SyntaxKind, to: SyntaxKind, except?: SyntaxKind[]): TokenRange;
+            static AllTokens(): TokenRange;
+            GetTokens(): SyntaxKind[];
+            Contains(token: SyntaxKind): boolean;
+            toString(): string;
+            static Any: TokenRange;
+            static AnyIncludingMultilineComments: TokenRange;
+            static Keywords: TokenRange;
+            static BinaryOperators: TokenRange;
+            static BinaryKeywordOperators: TokenRange;
+            static UnaryPrefixOperators: TokenRange;
+            static UnaryPrefixExpressions: TokenRange;
+            static UnaryPreincrementExpressions: TokenRange;
+            static UnaryPostincrementExpressions: TokenRange;
+            static UnaryPredecrementExpressions: TokenRange;
+            static UnaryPostdecrementExpressions: TokenRange;
+            static Comments: TokenRange;
+            static TypeNames: TokenRange;
+        }
+    }
+}
+declare namespace ts.formatting {
+    class RulesProvider {
+        private globalRules;
+        private options;
+        private activeRules;
+        private rulesMap;
+        constructor();
+        getRuleName(rule: Rule): string;
+        getRuleByName(name: string): Rule;
+        getRulesMap(): RulesMap;
+        ensureUpToDate(options: ts.FormatCodeOptions): void;
+        private createActiveRules(options);
+    }
+}
+declare namespace ts.formatting {
+    interface TextRangeWithKind extends TextRange {
+        kind: SyntaxKind;
+    }
+    interface TokenInfo {
+        leadingTrivia: TextRangeWithKind[];
+        token: TextRangeWithKind;
+        trailingTrivia: TextRangeWithKind[];
+    }
+    function formatOnEnter(position: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeOptions): TextChange[];
+    function formatOnSemicolon(position: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeOptions): TextChange[];
+    function formatOnClosingCurly(position: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeOptions): TextChange[];
+    function formatDocument(sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeOptions): TextChange[];
+    function formatSelection(start: number, end: number, sourceFile: SourceFile, rulesProvider: RulesProvider, options: FormatCodeOptions): TextChange[];
+    function getIndentationString(indentation: number, options: FormatCodeOptions): string;
+}
+declare namespace ts.formatting {
+    namespace SmartIndenter {
+        function getIndentation(position: number, sourceFile: SourceFile, options: EditorOptions): number;
+        function getIndentationForNode(n: Node, ignoreActualIndentationRange: TextRange, sourceFile: SourceFile, options: FormatCodeOptions): number;
+        function childStartsOnTheSameLineWithElseInIfStatement(parent: Node, child: TextRangeWithKind, childStartLine: number, sourceFile: SourceFile): boolean;
+        function findFirstNonWhitespaceCharacterAndColumn(startPos: number, endPos: number, sourceFile: SourceFile, options: EditorOptions): {
+            column: number;
+            character: number;
+        };
+        function findFirstNonWhitespaceColumn(startPos: number, endPos: number, sourceFile: SourceFile, options: EditorOptions): number;
+        function nodeWillIndentChild(parent: TextRangeWithKind, child: TextRangeWithKind, indentByDefault: boolean): boolean;
+        function shouldIndentChildNode(parent: TextRangeWithKind, child?: TextRangeWithKind): boolean;
+    }
+}
+declare namespace ts {
+    const servicesVersion: string;
+    interface Node {
+        getSourceFile(): SourceFile;
+        getChildCount(sourceFile?: SourceFile): number;
+        getChildAt(index: number, sourceFile?: SourceFile): Node;
+        getChildren(sourceFile?: SourceFile): Node[];
+        getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
+        getFullStart(): number;
+        getEnd(): number;
+        getWidth(sourceFile?: SourceFile): number;
+        getFullWidth(): number;
+        getLeadingTriviaWidth(sourceFile?: SourceFile): number;
+        getFullText(sourceFile?: SourceFile): string;
+        getText(sourceFile?: SourceFile): string;
+        getFirstToken(sourceFile?: SourceFile): Node;
+        getLastToken(sourceFile?: SourceFile): Node;
+    }
+    interface Symbol {
+        getFlags(): SymbolFlags;
+        getName(): string;
+        getDeclarations(): Declaration[];
+        getDocumentationComment(): SymbolDisplayPart[];
+    }
+    interface Type {
+        getFlags(): TypeFlags;
+        getSymbol(): Symbol;
+        getProperties(): Symbol[];
+        getProperty(propertyName: string): Symbol;
+        getApparentProperties(): Symbol[];
+        getCallSignatures(): Signature[];
+        getConstructSignatures(): Signature[];
+        getStringIndexType(): Type;
+        getNumberIndexType(): Type;
+        getBaseTypes(): ObjectType[];
+        getNonNullableType(): Type;
+    }
+    interface Signature {
+        getDeclaration(): SignatureDeclaration;
+        getTypeParameters(): Type[];
+        getParameters(): Symbol[];
+        getReturnType(): Type;
+        getDocumentationComment(): SymbolDisplayPart[];
+    }
+    interface SourceFile {
+        version: string;
+        scriptSnapshot: IScriptSnapshot;
+        nameTable: Map<number>;
+        getNamedDeclarations(): Map<Declaration[]>;
+        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+        getLineStarts(): number[];
+        getPositionOfLineAndCharacter(line: number, character: number): number;
+        update(newText: string, textChangeRange: TextChangeRange): SourceFile;
+    }
+    interface IScriptSnapshot {
+        getText(start: number, end: number): string;
+        getLength(): number;
+        getChangeRange(oldSnapshot: IScriptSnapshot): TextChangeRange;
+        dispose?(): void;
+    }
+    namespace ScriptSnapshot {
+        function fromString(text: string): IScriptSnapshot;
+    }
+    interface PreProcessedFileInfo {
+        referencedFiles: FileReference[];
+        typeReferenceDirectives: FileReference[];
+        importedFiles: FileReference[];
+        ambientExternalModules: string[];
+        isLibFile: boolean;
+    }
+    interface HostCancellationToken {
+        isCancellationRequested(): boolean;
+    }
+    interface LanguageServiceHost {
+        getCompilationSettings(): CompilerOptions;
+        getNewLine?(): string;
+        getProjectVersion?(): string;
+        getScriptFileNames(): string[];
+        getScriptKind?(fileName: string): ScriptKind;
+        getScriptVersion(fileName: string): string;
+        getScriptSnapshot(fileName: string): IScriptSnapshot | undefined;
+        getLocalizedDiagnosticMessages?(): any;
+        getCancellationToken?(): HostCancellationToken;
+        getCurrentDirectory(): string;
+        getDefaultLibFileName(options: CompilerOptions): string;
+        log?(s: string): void;
+        trace?(s: string): void;
+        error?(s: string): void;
+        useCaseSensitiveFileNames?(): boolean;
+        resolveModuleNames?(moduleNames: string[], containingFile: string): ResolvedModule[];
+        resolveTypeReferenceDirectives?(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
+        directoryExists?(directoryName: string): boolean;
+    }
+    interface LanguageService {
+        cleanupSemanticCache(): void;
+        getSyntacticDiagnostics(fileName: string): Diagnostic[];
+        getSemanticDiagnostics(fileName: string): Diagnostic[];
+        getCompilerOptionsDiagnostics(): Diagnostic[];
+        getSyntacticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[];
+        getSemanticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[];
+        getEncodedSyntacticClassifications(fileName: string, span: TextSpan): Classifications;
+        getEncodedSemanticClassifications(fileName: string, span: TextSpan): Classifications;
+        getCompletionsAtPosition(fileName: string, position: number): CompletionInfo;
+        getCompletionEntryDetails(fileName: string, position: number, entryName: string): CompletionEntryDetails;
+        getQuickInfoAtPosition(fileName: string, position: number): QuickInfo;
+        getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): TextSpan;
+        getBreakpointStatementAtPosition(fileName: string, position: number): TextSpan;
+        getSignatureHelpItems(fileName: string, position: number): SignatureHelpItems;
+        getRenameInfo(fileName: string, position: number): RenameInfo;
+        findRenameLocations(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): RenameLocation[];
+        getDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[];
+        getTypeDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[];
+        getReferencesAtPosition(fileName: string, position: number): ReferenceEntry[];
+        findReferences(fileName: string, position: number): ReferencedSymbol[];
+        getDocumentHighlights(fileName: string, position: number, filesToSearch: string[]): DocumentHighlights[];
+        getOccurrencesAtPosition(fileName: string, position: number): ReferenceEntry[];
+        getNavigateToItems(searchValue: string, maxResultCount?: number): NavigateToItem[];
+        getNavigationBarItems(fileName: string): NavigationBarItem[];
+        getOutliningSpans(fileName: string): OutliningSpan[];
+        getTodoComments(fileName: string, descriptors: TodoCommentDescriptor[]): TodoComment[];
+        getBraceMatchingAtPosition(fileName: string, position: number): TextSpan[];
+        getIndentationAtPosition(fileName: string, position: number, options: EditorOptions): number;
+        getFormattingEditsForRange(fileName: string, start: number, end: number, options: FormatCodeOptions): TextChange[];
+        getFormattingEditsForDocument(fileName: string, options: FormatCodeOptions): TextChange[];
+        getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: FormatCodeOptions): TextChange[];
+        getDocCommentTemplateAtPosition(fileName: string, position: number): TextInsertion;
+        isValidBraceCompletionAtPostion(fileName: string, position: number, openingBrace: number): boolean;
+        getEmitOutput(fileName: string): EmitOutput;
+        getProgram(): Program;
+        getNonBoundSourceFile(fileName: string): SourceFile;
+        dispose(): void;
+    }
+    interface Classifications {
+        spans: number[];
+        endOfLineState: EndOfLineState;
+    }
+    interface ClassifiedSpan {
+        textSpan: TextSpan;
+        classificationType: string;
+    }
+    interface NavigationBarItem {
+        text: string;
+        kind: string;
+        kindModifiers: string;
+        spans: TextSpan[];
+        childItems: NavigationBarItem[];
+        indent: number;
+        bolded: boolean;
+        grayed: boolean;
+    }
+    interface TodoCommentDescriptor {
+        text: string;
+        priority: number;
+    }
+    interface TodoComment {
+        descriptor: TodoCommentDescriptor;
+        message: string;
+        position: number;
+    }
+    class TextChange {
+        span: TextSpan;
+        newText: string;
+    }
+    interface TextInsertion {
+        newText: string;
+        caretOffset: number;
+    }
+    interface RenameLocation {
+        textSpan: TextSpan;
+        fileName: string;
+    }
+    interface ReferenceEntry {
+        textSpan: TextSpan;
+        fileName: string;
+        isWriteAccess: boolean;
+    }
+    interface DocumentHighlights {
+        fileName: string;
+        highlightSpans: HighlightSpan[];
+    }
+    namespace HighlightSpanKind {
+        const none: string;
+        const definition: string;
+        const reference: string;
+        const writtenReference: string;
+    }
+    interface HighlightSpan {
+        fileName?: string;
+        textSpan: TextSpan;
+        kind: string;
+    }
+    interface NavigateToItem {
+        name: string;
+        kind: string;
+        kindModifiers: string;
+        matchKind: string;
+        isCaseSensitive: boolean;
+        fileName: string;
+        textSpan: TextSpan;
+        containerName: string;
+        containerKind: string;
+    }
+    interface EditorOptions {
+        IndentSize: number;
+        TabSize: number;
+        NewLineCharacter: string;
+        ConvertTabsToSpaces: boolean;
+        IndentStyle: IndentStyle;
+    }
+    enum IndentStyle {
+        None = 0,
+        Block = 1,
+        Smart = 2,
+    }
+    interface FormatCodeOptions extends EditorOptions {
+        InsertSpaceAfterCommaDelimiter: boolean;
+        InsertSpaceAfterSemicolonInForStatements: boolean;
+        InsertSpaceBeforeAndAfterBinaryOperators: boolean;
+        InsertSpaceAfterKeywordsInControlFlowStatements: boolean;
+        InsertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
+        InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
+        InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: boolean;
+        InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
+        PlaceOpenBraceOnNewLineForFunctions: boolean;
+        PlaceOpenBraceOnNewLineForControlBlocks: boolean;
+        [s: string]: boolean | number | string;
+    }
+    interface DefinitionInfo {
+        fileName: string;
+        textSpan: TextSpan;
+        kind: string;
+        name: string;
+        containerKind: string;
+        containerName: string;
+    }
+    interface ReferencedSymbol {
+        definition: DefinitionInfo;
+        references: ReferenceEntry[];
+    }
+    enum SymbolDisplayPartKind {
+        aliasName = 0,
+        className = 1,
+        enumName = 2,
+        fieldName = 3,
+        interfaceName = 4,
+        keyword = 5,
+        lineBreak = 6,
+        numericLiteral = 7,
+        stringLiteral = 8,
+        localName = 9,
+        methodName = 10,
+        moduleName = 11,
+        operator = 12,
+        parameterName = 13,
+        propertyName = 14,
+        punctuation = 15,
+        space = 16,
+        text = 17,
+        typeParameterName = 18,
+        enumMemberName = 19,
+        functionName = 20,
+        regularExpressionLiteral = 21,
+    }
+    interface SymbolDisplayPart {
+        text: string;
+        kind: string;
+    }
+    interface QuickInfo {
+        kind: string;
+        kindModifiers: string;
+        textSpan: TextSpan;
+        displayParts: SymbolDisplayPart[];
+        documentation: SymbolDisplayPart[];
+    }
+    interface RenameInfo {
+        canRename: boolean;
+        localizedErrorMessage: string;
+        displayName: string;
+        fullDisplayName: string;
+        kind: string;
+        kindModifiers: string;
+        triggerSpan: TextSpan;
+    }
+    interface SignatureHelpParameter {
+        name: string;
+        documentation: SymbolDisplayPart[];
+        displayParts: SymbolDisplayPart[];
+        isOptional: boolean;
+    }
+    interface SignatureHelpItem {
+        isVariadic: boolean;
+        prefixDisplayParts: SymbolDisplayPart[];
+        suffixDisplayParts: SymbolDisplayPart[];
+        separatorDisplayParts: SymbolDisplayPart[];
+        parameters: SignatureHelpParameter[];
+        documentation: SymbolDisplayPart[];
+    }
+    interface SignatureHelpItems {
+        items: SignatureHelpItem[];
+        applicableSpan: TextSpan;
+        selectedItemIndex: number;
+        argumentIndex: number;
+        argumentCount: number;
+    }
+    interface CompletionInfo {
+        isMemberCompletion: boolean;
+        isNewIdentifierLocation: boolean;
+        entries: CompletionEntry[];
+    }
+    interface CompletionEntry {
+        name: string;
+        kind: string;
+        kindModifiers: string;
+        sortText: string;
+    }
+    interface CompletionEntryDetails {
+        name: string;
+        kind: string;
+        kindModifiers: string;
+        displayParts: SymbolDisplayPart[];
+        documentation: SymbolDisplayPart[];
+    }
+    interface OutliningSpan {
+        textSpan: TextSpan;
+        hintSpan: TextSpan;
+        bannerText: string;
+        autoCollapse: boolean;
+    }
+    interface EmitOutput {
+        outputFiles: OutputFile[];
+        emitSkipped: boolean;
+    }
+    const enum OutputFileType {
+        JavaScript = 0,
+        SourceMap = 1,
+        Declaration = 2,
+    }
+    interface OutputFile {
+        name: string;
+        writeByteOrderMark: boolean;
+        text: string;
+    }
+    const enum EndOfLineState {
+        None = 0,
+        InMultiLineCommentTrivia = 1,
+        InSingleQuoteStringLiteral = 2,
+        InDoubleQuoteStringLiteral = 3,
+        InTemplateHeadOrNoSubstitutionTemplate = 4,
+        InTemplateMiddleOrTail = 5,
+        InTemplateSubstitutionPosition = 6,
+    }
+    enum TokenClass {
+        Punctuation = 0,
+        Keyword = 1,
+        Operator = 2,
+        Comment = 3,
+        Whitespace = 4,
+        Identifier = 5,
+        NumberLiteral = 6,
+        StringLiteral = 7,
+        RegExpLiteral = 8,
+    }
+    interface ClassificationResult {
+        finalLexState: EndOfLineState;
+        entries: ClassificationInfo[];
+    }
+    interface ClassificationInfo {
+        length: number;
+        classification: TokenClass;
+    }
+    interface Classifier {
+        getClassificationsForLine(text: string, lexState: EndOfLineState, syntacticClassifierAbsent: boolean): ClassificationResult;
+        getEncodedLexicalClassifications(text: string, endOfLineState: EndOfLineState, syntacticClassifierAbsent: boolean): Classifications;
+    }
+    interface DocumentRegistry {
+        acquireDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
+        acquireDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
+        updateDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
+        updateDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
+        getKeyForCompilationSettings(settings: CompilerOptions): DocumentRegistryBucketKey;
+        releaseDocument(fileName: string, compilationSettings: CompilerOptions): void;
+        releaseDocumentWithKey(path: Path, key: DocumentRegistryBucketKey): void;
+        reportStats(): string;
+    }
+    type DocumentRegistryBucketKey = string & {
+        __bucketKey: any;
+    };
+    namespace ScriptElementKind {
+        const unknown: string;
+        const warning: string;
+        const keyword: string;
+        const scriptElement: string;
+        const moduleElement: string;
+        const classElement: string;
+        const localClassElement: string;
+        const interfaceElement: string;
+        const typeElement: string;
+        const enumElement: string;
+        const variableElement: string;
+        const localVariableElement: string;
+        const functionElement: string;
+        const localFunctionElement: string;
+        const memberFunctionElement: string;
+        const memberGetAccessorElement: string;
+        const memberSetAccessorElement: string;
+        const memberVariableElement: string;
+        const constructorImplementationElement: string;
+        const callSignatureElement: string;
+        const indexSignatureElement: string;
+        const constructSignatureElement: string;
+        const parameterElement: string;
+        const typeParameterElement: string;
+        const primitiveType: string;
+        const label: string;
+        const alias: string;
+        const constElement: string;
+        const letElement: string;
+    }
+    namespace ScriptElementKindModifier {
+        const none: string;
+        const publicMemberModifier: string;
+        const privateMemberModifier: string;
+        const protectedMemberModifier: string;
+        const exportedModifier: string;
+        const ambientModifier: string;
+        const staticModifier: string;
+        const abstractModifier: string;
+    }
+    class ClassificationTypeNames {
+        static comment: string;
+        static identifier: string;
+        static keyword: string;
+        static numericLiteral: string;
+        static operator: string;
+        static stringLiteral: string;
+        static whiteSpace: string;
+        static text: string;
+        static punctuation: string;
+        static className: string;
+        static enumName: string;
+        static interfaceName: string;
+        static moduleName: string;
+        static typeParameterName: string;
+        static typeAliasName: string;
+        static parameterName: string;
+        static docCommentTagName: string;
+        static jsxOpenTagName: string;
+        static jsxCloseTagName: string;
+        static jsxSelfClosingTagName: string;
+        static jsxAttribute: string;
+        static jsxText: string;
+        static jsxAttributeStringLiteralValue: string;
+    }
+    const enum ClassificationType {
+        comment = 1,
+        identifier = 2,
+        keyword = 3,
+        numericLiteral = 4,
+        operator = 5,
+        stringLiteral = 6,
+        regularExpressionLiteral = 7,
+        whiteSpace = 8,
+        text = 9,
+        punctuation = 10,
+        className = 11,
+        enumName = 12,
+        interfaceName = 13,
+        moduleName = 14,
+        typeParameterName = 15,
+        typeAliasName = 16,
+        parameterName = 17,
+        docCommentTagName = 18,
+        jsxOpenTagName = 19,
+        jsxCloseTagName = 20,
+        jsxSelfClosingTagName = 21,
+        jsxAttribute = 22,
+        jsxText = 23,
+        jsxAttributeStringLiteralValue = 24,
+    }
+    interface DisplayPartsSymbolWriter extends SymbolWriter {
+        displayParts(): SymbolDisplayPart[];
+    }
+    function displayPartsToString(displayParts: SymbolDisplayPart[]): string;
+    function getDefaultCompilerOptions(): CompilerOptions;
+    interface TranspileOptions {
+        compilerOptions?: CompilerOptions;
+        fileName?: string;
+        reportDiagnostics?: boolean;
+        moduleName?: string;
+        renamedDependencies?: Map<string>;
+    }
+    interface TranspileOutput {
+        outputText: string;
+        diagnostics?: Diagnostic[];
+        sourceMapText?: string;
+    }
+    function transpileModule(input: string, transpileOptions: TranspileOptions): TranspileOutput;
+    function transpile(input: string, compilerOptions?: CompilerOptions, fileName?: string, diagnostics?: Diagnostic[], moduleName?: string): string;
+    function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTarget: ScriptTarget, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile;
+    let disableIncrementalParsing: boolean;
+    function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
+    function createDocumentRegistry(useCaseSensitiveFileNames?: boolean, currentDirectory?: string): DocumentRegistry;
+    function preProcessFile(sourceText: string, readImportFiles?: boolean, detectJavaScriptImports?: boolean): PreProcessedFileInfo;
+    function getContainerNode(node: Node): Declaration;
+    function getNodeKind(node: Node): string;
+    function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry): LanguageService;
+    function getNameTable(sourceFile: SourceFile): Map<number>;
+    function createClassifier(): Classifier;
+    function getDefaultLibFilePath(options: CompilerOptions): string;
+}
+declare namespace ts.server {
+    function generateSpaces(n: number): string;
+    function generateIndentString(n: number, editorOptions: EditorOptions): string;
+    interface PendingErrorCheck {
+        fileName: string;
+        project: Project;
+    }
+    namespace CommandNames {
+        const Brace: string;
+        const Change: string;
+        const Close: string;
+        const Completions: string;
+        const CompletionDetails: string;
+        const Configure: string;
+        const Definition: string;
+        const Exit: string;
+        const Format: string;
+        const Formatonkey: string;
+        const Geterr: string;
+        const GeterrForProject: string;
+        const NavBar: string;
+        const Navto: string;
+        const Occurrences: string;
+        const DocumentHighlights: string;
+        const Open: string;
+        const Quickinfo: string;
+        const References: string;
+        const Reload: string;
+        const Rename: string;
+        const Saveto: string;
+        const SignatureHelp: string;
+        const TypeDefinition: string;
+        const ProjectInfo: string;
+        const ReloadProjects: string;
+        const Unknown: string;
+    }
+    interface ServerHost extends ts.System {
+        setTimeout(callback: (...args: any[]) => void, ms: number, ...args: any[]): any;
+        clearTimeout(timeoutId: any): void;
+    }
+    class Session {
+        private host;
+        private byteLength;
+        private hrtime;
+        private logger;
+        protected projectService: ProjectService;
+        private errorTimer;
+        private immediateId;
+        private changeSeq;
+        constructor(host: ServerHost, byteLength: (buf: string, encoding?: string) => number, hrtime: (start?: number[]) => number[], logger: Logger);
+        private handleEvent(eventName, project, fileName);
+        logError(err: Error, cmd: string): void;
+        private sendLineToClient(line);
+        send(msg: protocol.Message): void;
+        configFileDiagnosticEvent(triggerFile: string, configFile: string, diagnostics: ts.Diagnostic[]): void;
+        event(info: any, eventName: string): void;
+        private response(info, cmdName, reqSeq?, errorMsg?);
+        output(body: any, commandName: string, requestSequence?: number, errorMessage?: string): void;
+        private semanticCheck(file, project);
+        private syntacticCheck(file, project);
+        private reloadProjects();
+        private updateProjectStructure(seq, matchSeq, ms?);
+        private updateErrorCheck(checkList, seq, matchSeq, ms?, followMs?, requireOpen?);
+        private getDefinition(line, offset, fileName);
+        private getTypeDefinition(line, offset, fileName);
+        private getOccurrences(line, offset, fileName);
+        private getDocumentHighlights(line, offset, fileName, filesToSearch);
+        private getProjectInfo(fileName, needFileNameList);
+        private getRenameLocations(line, offset, fileName, findInComments, findInStrings);
+        private getReferences(line, offset, fileName);
+        private openClientFile(fileName, fileContent?, scriptKind?);
+        private getQuickInfo(line, offset, fileName);
+        private getFormattingEditsForRange(line, offset, endLine, endOffset, fileName);
+        private getFormattingEditsAfterKeystroke(line, offset, key, fileName);
+        private getCompletions(line, offset, prefix, fileName);
+        private getCompletionEntryDetails(line, offset, entryNames, fileName);
+        private getSignatureHelpItems(line, offset, fileName);
+        private getDiagnostics(delay, fileNames);
+        private change(line, offset, endLine, endOffset, insertString, fileName);
+        private reload(fileName, tempFileName, reqSeq?);
+        private saveToTmp(fileName, tempFileName);
+        private closeClientFile(fileName);
+        private decorateNavigationBarItem(project, fileName, items);
+        private getNavigationBarItems(fileName);
+        private getNavigateToItems(searchValue, fileName, maxResultCount?);
+        private getBraceMatching(line, offset, fileName);
+        getDiagnosticsForProject(delay: number, fileName: string): void;
+        getCanonicalFileName(fileName: string): string;
+        exit(): void;
+        private handlers;
+        addProtocolHandler(command: string, handler: (request: protocol.Request) => {
+            response?: any;
+            responseRequired: boolean;
+        }): void;
+        executeCommand(request: protocol.Request): {
+            response?: any;
+            responseRequired?: boolean;
+        };
+        onMessage(message: string): void;
+    }
+}
+declare namespace ts.server {
+    interface Logger {
+        close(): void;
+        isVerbose(): boolean;
+        loggingEnabled(): boolean;
+        perftrc(s: string): void;
+        info(s: string): void;
+        startGroup(): void;
+        endGroup(): void;
+        msg(s: string, type?: string): void;
+    }
+    class ScriptInfo {
+        private host;
+        fileName: string;
+        content: string;
+        isOpen: boolean;
+        svc: ScriptVersionCache;
+        children: ScriptInfo[];
+        defaultProject: Project;
+        fileWatcher: FileWatcher;
+        formatCodeOptions: FormatCodeOptions;
+        path: Path;
+        scriptKind: ScriptKind;
+        constructor(host: ServerHost, fileName: string, content: string, isOpen?: boolean);
+        setFormatOptions(formatOptions: protocol.FormatOptions): void;
+        close(): void;
+        addChild(childInfo: ScriptInfo): void;
+        snap(): LineIndexSnapshot;
+        getText(): string;
+        getLineInfo(line: number): ILineInfo;
+        editContent(start: number, end: number, newText: string): void;
+        getTextChangeRangeBetweenVersions(startVersion: number, endVersion: number): ts.TextChangeRange;
+        getChangeRange(oldSnapshot: ts.IScriptSnapshot): ts.TextChangeRange;
+    }
+    class LSHost implements ts.LanguageServiceHost {
+        host: ServerHost;
+        project: Project;
+        ls: ts.LanguageService;
+        compilationSettings: ts.CompilerOptions;
+        filenameToScript: ts.FileMap<ScriptInfo>;
+        roots: ScriptInfo[];
+        private resolvedModuleNames;
+        private resolvedTypeReferenceDirectives;
+        private moduleResolutionHost;
+        private getCanonicalFileName;
+        constructor(host: ServerHost, project: Project);
+        private resolveNamesWithLocalCache<T, R>(names, containingFile, cache, loader, getResult);
+        resolveTypeReferenceDirectives(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
+        resolveModuleNames(moduleNames: string[], containingFile: string): ResolvedModule[];
+        getDefaultLibFileName(): string;
+        getScriptSnapshot(filename: string): ts.IScriptSnapshot;
+        setCompilationSettings(opt: ts.CompilerOptions): void;
+        lineAffectsRefs(filename: string, line: number): boolean;
+        getCompilationSettings(): CompilerOptions;
+        getScriptFileNames(): string[];
+        getScriptKind(fileName: string): ScriptKind;
+        getScriptVersion(filename: string): string;
+        getCurrentDirectory(): string;
+        getScriptIsOpen(filename: string): boolean;
+        removeReferencedFile(info: ScriptInfo): void;
+        getScriptInfo(filename: string): ScriptInfo;
+        addRoot(info: ScriptInfo): void;
+        removeRoot(info: ScriptInfo): void;
+        saveTo(filename: string, tmpfilename: string): void;
+        reloadScript(filename: string, tmpfilename: string, cb: () => any): void;
+        editScript(filename: string, start: number, end: number, newText: string): void;
+        resolvePath(path: string): string;
+        fileExists(path: string): boolean;
+        directoryExists(path: string): boolean;
+        lineToTextSpan(filename: string, line: number): ts.TextSpan;
+        lineOffsetToPosition(filename: string, line: number, offset: number): number;
+        positionToLineOffset(filename: string, position: number): ILineInfo;
+    }
+    interface ProjectOptions {
+        files?: string[];
+        compilerOptions?: ts.CompilerOptions;
+    }
+    class Project {
+        projectService: ProjectService;
+        projectOptions?: ProjectOptions;
+        compilerService: CompilerService;
+        projectFilename: string;
+        projectFileWatcher: FileWatcher;
+        directoryWatcher: FileWatcher;
+        directoriesWatchedForTsconfig: string[];
+        program: ts.Program;
+        filenameToSourceFile: ts.Map<ts.SourceFile>;
+        updateGraphSeq: number;
+        openRefCount: number;
+        constructor(projectService: ProjectService, projectOptions?: ProjectOptions);
+        addOpenRef(): void;
+        deleteOpenRef(): number;
+        openReferencedFile(filename: string): ScriptInfo;
+        getRootFiles(): string[];
+        getFileNames(): string[];
+        getSourceFile(info: ScriptInfo): SourceFile;
+        getSourceFileFromName(filename: string, requireOpen?: boolean): SourceFile;
+        isRoot(info: ScriptInfo): boolean;
+        removeReferencedFile(info: ScriptInfo): void;
+        updateFileMap(): void;
+        finishGraph(): void;
+        updateGraph(): void;
+        isConfiguredProject(): string;
+        addRoot(info: ScriptInfo): void;
+        removeRoot(info: ScriptInfo): void;
+        filesToString(): string;
+        setProjectOptions(projectOptions: ProjectOptions): void;
+    }
+    interface ProjectOpenResult {
+        success?: boolean;
+        errorMsg?: string;
+        project?: Project;
+    }
+    function combineProjectOutput<T>(projects: Project[], action: (project: Project) => T[], comparer?: (a: T, b: T) => number, areEqual?: (a: T, b: T) => boolean): T[];
+    interface ProjectServiceEventHandler {
+        (eventName: string, project: Project, fileName: string): void;
+    }
+    interface HostConfiguration {
+        formatCodeOptions: ts.FormatCodeOptions;
+        hostInfo: string;
+    }
+    class ProjectService {
+        host: ServerHost;
+        psLogger: Logger;
+        eventHandler?: ProjectServiceEventHandler;
+        filenameToScriptInfo: ts.Map<ScriptInfo>;
+        openFileRoots: ScriptInfo[];
+        inferredProjects: Project[];
+        configuredProjects: Project[];
+        openFilesReferenced: ScriptInfo[];
+        openFileRootsConfigured: ScriptInfo[];
+        directoryWatchersForTsconfig: ts.Map<FileWatcher>;
+        directoryWatchersRefCount: ts.Map<number>;
+        hostConfiguration: HostConfiguration;
+        timerForDetectingProjectFileListChanges: Map<any>;
+        constructor(host: ServerHost, psLogger: Logger, eventHandler?: ProjectServiceEventHandler);
+        addDefaultHostConfiguration(): void;
+        getFormatCodeOptions(file?: string): FormatCodeOptions;
+        watchedFileChanged(fileName: string): void;
+        directoryWatchedForSourceFilesChanged(project: Project, fileName: string): void;
+        startTimerForDetectingProjectFileListChanges(project: Project): void;
+        handleProjectFileListChanges(project: Project): void;
+        directoryWatchedForTsconfigChanged(fileName: string): void;
+        getCanonicalFileName(fileName: string): string;
+        watchedProjectConfigFileChanged(project: Project): void;
+        log(msg: string, type?: string): void;
+        setHostConfiguration(args: ts.server.protocol.ConfigureRequestArguments): void;
+        closeLog(): void;
+        createInferredProject(root: ScriptInfo): Project;
+        fileDeletedInFilesystem(info: ScriptInfo): void;
+        updateConfiguredProjectList(): void;
+        removeProject(project: Project): void;
+        setConfiguredProjectRoot(info: ScriptInfo): boolean;
+        addOpenFile(info: ScriptInfo): void;
+        closeOpenFile(info: ScriptInfo): void;
+        findReferencingProjects(info: ScriptInfo, excludedProject?: Project): Project[];
+        reloadProjects(): void;
+        updateProjectStructure(): void;
+        getScriptInfo(filename: string): ScriptInfo;
+        openFile(fileName: string, openedByClient: boolean, fileContent?: string, scriptKind?: ScriptKind): ScriptInfo;
+        findConfigFile(searchPath: string): string;
+        openClientFile(fileName: string, fileContent?: string, scriptKind?: ScriptKind): {
+            configFileName?: string;
+            configFileErrors?: Diagnostic[];
+        };
+        openOrUpdateConfiguredProjectForFile(fileName: string): {
+            configFileName?: string;
+            configFileErrors?: Diagnostic[];
+        };
+        closeClientFile(filename: string): void;
+        getProjectForFile(filename: string): Project;
+        printProjectsForFile(filename: string): void;
+        printProjects(): void;
+        configProjectIsActive(fileName: string): boolean;
+        findConfiguredProjectByConfigFile(configFileName: string): Project;
+        configFileToProjectOptions(configFilename: string): {
+            succeeded: boolean;
+            projectOptions?: ProjectOptions;
+            errors?: Diagnostic[];
+        };
+        openConfigFile(configFilename: string, clientFileName?: string): {
+            success: boolean;
+            project?: Project;
+            errors?: Diagnostic[];
+        };
+        updateConfiguredProject(project: Project): Diagnostic[];
+        createProject(projectFilename: string, projectOptions?: ProjectOptions): Project;
+    }
+    class CompilerService {
+        project: Project;
+        host: LSHost;
+        languageService: ts.LanguageService;
+        classifier: ts.Classifier;
+        settings: ts.CompilerOptions;
+        documentRegistry: DocumentRegistry;
+        constructor(project: Project, opt?: ts.CompilerOptions);
+        setCompilerOptions(opt: ts.CompilerOptions): void;
+        isExternalModule(filename: string): boolean;
+        static getDefaultFormatCodeOptions(host: ServerHost): ts.FormatCodeOptions;
+    }
+    interface LineCollection {
+        charCount(): number;
+        lineCount(): number;
+        isLeaf(): boolean;
+        walk(rangeStart: number, rangeLength: number, walkFns: ILineIndexWalker): void;
+    }
+    interface ILineInfo {
+        line: number;
+        offset: number;
+        text?: string;
+        leaf?: LineLeaf;
+    }
+    enum CharRangeSection {
+        PreStart = 0,
+        Start = 1,
+        Entire = 2,
+        Mid = 3,
+        End = 4,
+        PostEnd = 5,
+    }
+    interface ILineIndexWalker {
+        goSubtree: boolean;
+        done: boolean;
+        leaf(relativeStart: number, relativeLength: number, lineCollection: LineLeaf): void;
+        pre?(relativeStart: number, relativeLength: number, lineCollection: LineCollection, parent: LineNode, nodeType: CharRangeSection): LineCollection;
+        post?(relativeStart: number, relativeLength: number, lineCollection: LineCollection, parent: LineNode, nodeType: CharRangeSection): LineCollection;
+    }
+    class TextChange {
+        pos: number;
+        deleteLen: number;
+        insertedText?: string;
+        constructor(pos: number, deleteLen: number, insertedText?: string);
+        getTextChangeRange(): TextChangeRange;
+    }
+    class ScriptVersionCache {
+        changes: TextChange[];
+        versions: LineIndexSnapshot[];
+        minVersion: number;
+        private currentVersion;
+        private host;
+        static changeNumberThreshold: number;
+        static changeLengthThreshold: number;
+        static maxVersions: number;
+        edit(pos: number, deleteLen: number, insertedText?: string): void;
+        latest(): LineIndexSnapshot;
+        latestVersion(): number;
+        reloadFromFile(filename: string, cb?: () => any): void;
+        reload(script: string): void;
+        getSnapshot(): LineIndexSnapshot;
+        getTextChangesBetweenVersions(oldVersion: number, newVersion: number): TextChangeRange;
+        static fromString(host: ServerHost, script: string): ScriptVersionCache;
+    }
+    class LineIndexSnapshot implements ts.IScriptSnapshot {
+        version: number;
+        cache: ScriptVersionCache;
+        index: LineIndex;
+        changesSincePreviousVersion: TextChange[];
+        constructor(version: number, cache: ScriptVersionCache);
+        getText(rangeStart: number, rangeEnd: number): string;
+        getLength(): number;
+        getLineStartPositions(): number[];
+        getLineMapper(): (line: number) => number;
+        getTextChangeRangeSinceVersion(scriptVersion: number): TextChangeRange;
+        getChangeRange(oldSnapshot: ts.IScriptSnapshot): ts.TextChangeRange;
+    }
+    class LineIndex {
+        root: LineNode;
+        checkEdits: boolean;
+        charOffsetToLineNumberAndPos(charOffset: number): ILineInfo;
+        lineNumberToInfo(lineNumber: number): ILineInfo;
+        load(lines: string[]): void;
+        walk(rangeStart: number, rangeLength: number, walkFns: ILineIndexWalker): void;
+        getText(rangeStart: number, rangeLength: number): string;
+        getLength(): number;
+        every(f: (ll: LineLeaf, s: number, len: number) => boolean, rangeStart: number, rangeEnd?: number): boolean;
+        edit(pos: number, deleteLength: number, newText?: string): LineIndex;
+        static buildTreeFromBottom(nodes: LineCollection[]): LineNode;
+        static linesFromText(text: string): {
+            lines: string[];
+            lineMap: number[];
+        };
+    }
+    class LineNode implements LineCollection {
+        totalChars: number;
+        totalLines: number;
+        children: LineCollection[];
+        isLeaf(): boolean;
+        updateCounts(): void;
+        execWalk(rangeStart: number, rangeLength: number, walkFns: ILineIndexWalker, childIndex: number, nodeType: CharRangeSection): boolean;
+        skipChild(relativeStart: number, relativeLength: number, childIndex: number, walkFns: ILineIndexWalker, nodeType: CharRangeSection): void;
+        walk(rangeStart: number, rangeLength: number, walkFns: ILineIndexWalker): void;
+        charOffsetToLineNumberAndPos(lineNumber: number, charOffset: number): ILineInfo;
+        lineNumberToInfo(lineNumber: number, charOffset: number): ILineInfo;
+        childFromLineNumber(lineNumber: number, charOffset: number): {
+            child: LineCollection;
+            childIndex: number;
+            relativeLineNumber: number;
+            charOffset: number;
+        };
+        childFromCharOffset(lineNumber: number, charOffset: number): {
+            child: LineCollection;
+            childIndex: number;
+            charOffset: number;
+            lineNumber: number;
+        };
+        splitAfter(childIndex: number): LineNode;
+        remove(child: LineCollection): void;
+        findChildIndex(child: LineCollection): number;
+        insertAt(child: LineCollection, nodes: LineCollection[]): LineNode[];
+        add(collection: LineCollection): boolean;
+        charCount(): number;
+        lineCount(): number;
+    }
+    class LineLeaf implements LineCollection {
+        text: string;
+        udata: any;
+        constructor(text: string);
+        setUdata(data: any): void;
+        getUdata(): any;
+        isLeaf(): boolean;
+        walk(rangeStart: number, rangeLength: number, walkFns: ILineIndexWalker): void;
+        charCount(): number;
+        lineCount(): number;
+    }
+}
+declare let debugObjectHost: any;
+declare namespace ts {
+    interface ScriptSnapshotShim {
+        getText(start: number, end: number): string;
+        getLength(): number;
+        getChangeRange(oldSnapshot: ScriptSnapshotShim): string;
+        dispose?(): void;
+    }
+    interface Logger {
+        log(s: string): void;
+        trace(s: string): void;
+        error(s: string): void;
+    }
+    interface LanguageServiceShimHost extends Logger {
+        getCompilationSettings(): string;
+        getScriptFileNames(): string;
+        getScriptKind?(fileName: string): ScriptKind;
+        getScriptVersion(fileName: string): string;
+        getScriptSnapshot(fileName: string): ScriptSnapshotShim;
+        getLocalizedDiagnosticMessages(): string;
+        getCancellationToken(): HostCancellationToken;
+        getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
+        getDefaultLibFileName(options: string): string;
+        getNewLine?(): string;
+        getProjectVersion?(): string;
+        useCaseSensitiveFileNames?(): boolean;
+        getModuleResolutionsForFile?(fileName: string): string;
+        getTypeReferenceDirectiveResolutionsForFile?(fileName: string): string;
+        directoryExists(directoryName: string): boolean;
+    }
+    interface CoreServicesShimHost extends Logger, ModuleResolutionHost {
+        readDirectory(rootDir: string, extension: string, exclude?: string, depth?: number): string;
+        trace(s: string): void;
+    }
+    interface IFileReference {
+        path: string;
+        position: number;
+        length: number;
+    }
+    interface ShimFactory {
+        registerShim(shim: Shim): void;
+        unregisterShim(shim: Shim): void;
+    }
+    interface Shim {
+        dispose(dummy: any): void;
+    }
+    interface LanguageServiceShim extends Shim {
+        languageService: LanguageService;
+        dispose(dummy: any): void;
+        refresh(throwOnError: boolean): void;
+        cleanupSemanticCache(): void;
+        getSyntacticDiagnostics(fileName: string): string;
+        getSemanticDiagnostics(fileName: string): string;
+        getCompilerOptionsDiagnostics(): string;
+        getSyntacticClassifications(fileName: string, start: number, length: number): string;
+        getSemanticClassifications(fileName: string, start: number, length: number): string;
+        getEncodedSyntacticClassifications(fileName: string, start: number, length: number): string;
+        getEncodedSemanticClassifications(fileName: string, start: number, length: number): string;
+        getCompletionsAtPosition(fileName: string, position: number): string;
+        getCompletionEntryDetails(fileName: string, position: number, entryName: string): string;
+        getQuickInfoAtPosition(fileName: string, position: number): string;
+        getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): string;
+        getBreakpointStatementAtPosition(fileName: string, position: number): string;
+        getSignatureHelpItems(fileName: string, position: number): string;
+        getRenameInfo(fileName: string, position: number): string;
+        findRenameLocations(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): string;
+        getDefinitionAtPosition(fileName: string, position: number): string;
+        getTypeDefinitionAtPosition(fileName: string, position: number): string;
+        getReferencesAtPosition(fileName: string, position: number): string;
+        findReferences(fileName: string, position: number): string;
+        getOccurrencesAtPosition(fileName: string, position: number): string;
+        getDocumentHighlights(fileName: string, position: number, filesToSearch: string): string;
+        getNavigateToItems(searchValue: string, maxResultCount?: number): string;
+        getNavigationBarItems(fileName: string): string;
+        getOutliningSpans(fileName: string): string;
+        getTodoComments(fileName: string, todoCommentDescriptors: string): string;
+        getBraceMatchingAtPosition(fileName: string, position: number): string;
+        getIndentationAtPosition(fileName: string, position: number, options: string): string;
+        getFormattingEditsForRange(fileName: string, start: number, end: number, options: string): string;
+        getFormattingEditsForDocument(fileName: string, options: string): string;
+        getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: string): string;
+        getDocCommentTemplateAtPosition(fileName: string, position: number): string;
+        isValidBraceCompletionAtPostion(fileName: string, position: number, openingBrace: number): string;
+        getEmitOutput(fileName: string): string;
+    }
+    interface ClassifierShim extends Shim {
+        getEncodedLexicalClassifications(text: string, lexState: EndOfLineState, syntacticClassifierAbsent?: boolean): string;
+        getClassificationsForLine(text: string, lexState: EndOfLineState, syntacticClassifierAbsent?: boolean): string;
+    }
+    interface CoreServicesShim extends Shim {
+        getPreProcessedFileInfo(fileName: string, sourceText: IScriptSnapshot): string;
+        getTSConfigFileInfo(fileName: string, sourceText: IScriptSnapshot): string;
+        getDefaultCompilationSettings(): string;
+        discoverTypings(discoverTypingsJson: string): string;
+    }
+    class LanguageServiceShimHostAdapter implements LanguageServiceHost {
+        private shimHost;
+        private files;
+        private loggingEnabled;
+        private tracingEnabled;
+        resolveModuleNames: (moduleName: string[], containingFile: string) => ResolvedModule[];
+        resolveTypeReferenceDirectives: (typeDirectiveNames: string[], containingFile: string) => ResolvedTypeReferenceDirective[];
+        directoryExists: (directoryName: string) => boolean;
+        constructor(shimHost: LanguageServiceShimHost);
+        log(s: string): void;
+        trace(s: string): void;
+        error(s: string): void;
+        getProjectVersion(): string;
+        useCaseSensitiveFileNames(): boolean;
+        getCompilationSettings(): CompilerOptions;
+        getScriptFileNames(): string[];
+        getScriptSnapshot(fileName: string): IScriptSnapshot;
+        getScriptKind(fileName: string): ScriptKind;
+        getScriptVersion(fileName: string): string;
+        getLocalizedDiagnosticMessages(): any;
+        getCancellationToken(): HostCancellationToken;
+        getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
+        getDefaultLibFileName(options: CompilerOptions): string;
+    }
+    class CoreServicesShimHostAdapter implements ParseConfigHost, ModuleResolutionHost {
+        private shimHost;
+        directoryExists: (directoryName: string) => boolean;
+        realpath: (path: string) => string;
+        constructor(shimHost: CoreServicesShimHost);
+        readDirectory(rootDir: string, extension: string, exclude: string[], depth?: number): string[];
+        fileExists(fileName: string): boolean;
+        readFile(fileName: string): string;
+    }
+    function realizeDiagnostics(diagnostics: Diagnostic[], newLine: string): {
+        message: string;
+        start: number;
+        length: number;
+        category: string;
+        code: number;
+    }[];
+    class TypeScriptServicesFactory implements ShimFactory {
+        private _shims;
+        private documentRegistry;
+        getServicesVersion(): string;
+        createLanguageServiceShim(host: LanguageServiceShimHost): LanguageServiceShim;
+        createClassifierShim(logger: Logger): ClassifierShim;
+        createCoreServicesShim(host: CoreServicesShimHost): CoreServicesShim;
+        close(): void;
+        registerShim(shim: Shim): void;
+        unregisterShim(shim: Shim): void;
+    }
+}
+declare namespace TypeScript.Services {
+    const TypeScriptServicesFactory: typeof ts.TypeScriptServicesFactory;
+}
+declare const toolsVersion: string;
diff --git a/lib/tsserverlibrary.js b/lib/tsserverlibrary.js
index 8bab90c0790..2da5d67be8a 100644
--- a/lib/tsserverlibrary.js
+++ b/lib/tsserverlibrary.js
@@ -13,51620 +13,52220 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
-var __extends = (this && this.__extends) || function (d, b) {
-    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
-    function __() { this.constructor = d; }
-    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
-};
-var ts;
-(function (ts) {
-    var OperationCanceledException = (function () {
-        function OperationCanceledException() {
-        }
-        return OperationCanceledException;
-    }());
-    ts.OperationCanceledException = OperationCanceledException;
-    (function (ExitStatus) {
-        ExitStatus[ExitStatus["Success"] = 0] = "Success";
-        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
-        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
-    })(ts.ExitStatus || (ts.ExitStatus = {}));
-    var ExitStatus = ts.ExitStatus;
-    (function (TypeReferenceSerializationKind) {
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithConstructSignatureAndValue"] = 1] = "TypeWithConstructSignatureAndValue";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["VoidType"] = 2] = "VoidType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["NumberLikeType"] = 3] = "NumberLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["StringLikeType"] = 4] = "StringLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["BooleanType"] = 5] = "BooleanType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ArrayLikeType"] = 6] = "ArrayLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ESSymbolType"] = 7] = "ESSymbolType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 8] = "TypeWithCallSignature";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 9] = "ObjectType";
-    })(ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
-    var TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind;
-    (function (DiagnosticCategory) {
-        DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
-        DiagnosticCategory[DiagnosticCategory["Error"] = 1] = "Error";
-        DiagnosticCategory[DiagnosticCategory["Message"] = 2] = "Message";
-    })(ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
-    var DiagnosticCategory = ts.DiagnosticCategory;
-    (function (ModuleResolutionKind) {
-        ModuleResolutionKind[ModuleResolutionKind["Classic"] = 1] = "Classic";
-        ModuleResolutionKind[ModuleResolutionKind["NodeJs"] = 2] = "NodeJs";
-    })(ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
-    var ModuleResolutionKind = ts.ModuleResolutionKind;
-    (function (ModuleKind) {
-        ModuleKind[ModuleKind["None"] = 0] = "None";
-        ModuleKind[ModuleKind["CommonJS"] = 1] = "CommonJS";
-        ModuleKind[ModuleKind["AMD"] = 2] = "AMD";
-        ModuleKind[ModuleKind["UMD"] = 3] = "UMD";
-        ModuleKind[ModuleKind["System"] = 4] = "System";
-        ModuleKind[ModuleKind["ES6"] = 5] = "ES6";
-        ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
-    })(ts.ModuleKind || (ts.ModuleKind = {}));
-    var ModuleKind = ts.ModuleKind;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function createFileMap(keyMapper) {
-        var files = {};
-        return {
-            get: get,
-            set: set,
-            contains: contains,
-            remove: remove,
-            forEachValue: forEachValueInMap,
-            clear: clear
-        };
-        function forEachValueInMap(f) {
-            for (var key in files) {
-                f(key, files[key]);
-            }
-        }
-        function get(path) {
-            return files[toKey(path)];
-        }
-        function set(path, value) {
-            files[toKey(path)] = value;
-        }
-        function contains(path) {
-            return hasProperty(files, toKey(path));
-        }
-        function remove(path) {
-            var key = toKey(path);
-            delete files[key];
-        }
-        function clear() {
-            files = {};
-        }
-        function toKey(path) {
-            return keyMapper ? keyMapper(path) : path;
-        }
-    }
-    ts.createFileMap = createFileMap;
-    function toPath(fileName, basePath, getCanonicalFileName) {
-        var nonCanonicalizedPath = isRootedDiskPath(fileName)
-            ? normalizePath(fileName)
-            : getNormalizedAbsolutePath(fileName, basePath);
-        return getCanonicalFileName(nonCanonicalizedPath);
-    }
-    ts.toPath = toPath;
-    function forEach(array, callback) {
-        if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
-                var result = callback(array[i], i);
-                if (result) {
-                    return result;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.forEach = forEach;
-    function contains(array, value, areEqual) {
-        if (array) {
-            for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
-                var v = array_1[_i];
-                if (areEqual ? areEqual(v, value) : v === value) {
-                    return true;
-                }
-            }
-        }
-        return false;
-    }
-    ts.contains = contains;
-    function indexOf(array, value) {
-        if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
-                if (array[i] === value) {
-                    return i;
-                }
-            }
-        }
-        return -1;
-    }
-    ts.indexOf = indexOf;
-    function countWhere(array, predicate) {
-        var count = 0;
-        if (array) {
-            for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
-                var v = array_2[_i];
-                if (predicate(v)) {
-                    count++;
-                }
-            }
-        }
-        return count;
-    }
-    ts.countWhere = countWhere;
-    function filter(array, f) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_3 = array; _i < array_3.length; _i++) {
-                var item = array_3[_i];
-                if (f(item)) {
-                    result.push(item);
-                }
-            }
-        }
-        return result;
-    }
-    ts.filter = filter;
-    function map(array, f) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_4 = array; _i < array_4.length; _i++) {
-                var v = array_4[_i];
-                result.push(f(v));
-            }
-        }
-        return result;
-    }
-    ts.map = map;
-    function concatenate(array1, array2) {
-        if (!array2 || !array2.length)
-            return array1;
-        if (!array1 || !array1.length)
-            return array2;
-        return array1.concat(array2);
-    }
-    ts.concatenate = concatenate;
-    function deduplicate(array, areEqual) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
-                var item = array_5[_i];
-                if (!contains(result, item, areEqual)) {
-                    result.push(item);
-                }
-            }
-        }
-        return result;
-    }
-    ts.deduplicate = deduplicate;
-    function sum(array, prop) {
-        var result = 0;
-        for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
-            var v = array_6[_i];
-            result += v[prop];
-        }
-        return result;
-    }
-    ts.sum = sum;
-    function addRange(to, from) {
-        if (to && from) {
-            for (var _i = 0, from_1 = from; _i < from_1.length; _i++) {
-                var v = from_1[_i];
-                to.push(v);
-            }
-        }
-    }
-    ts.addRange = addRange;
-    function rangeEquals(array1, array2, pos, end) {
-        while (pos < end) {
-            if (array1[pos] !== array2[pos]) {
-                return false;
-            }
-            pos++;
-        }
-        return true;
-    }
-    ts.rangeEquals = rangeEquals;
-    function lastOrUndefined(array) {
-        if (array.length === 0) {
-            return undefined;
-        }
-        return array[array.length - 1];
-    }
-    ts.lastOrUndefined = lastOrUndefined;
-    function binarySearch(array, value) {
-        var low = 0;
-        var high = array.length - 1;
-        while (low <= high) {
-            var middle = low + ((high - low) >> 1);
-            var midValue = array[middle];
-            if (midValue === value) {
-                return middle;
-            }
-            else if (midValue > value) {
-                high = middle - 1;
-            }
-            else {
-                low = middle + 1;
-            }
-        }
-        return ~low;
-    }
-    ts.binarySearch = binarySearch;
-    function reduceLeft(array, f, initial) {
-        if (array) {
-            var count = array.length;
-            if (count > 0) {
-                var pos = 0;
-                var result = void 0;
-                if (arguments.length <= 2) {
-                    result = array[pos];
-                    pos++;
-                }
-                else {
-                    result = initial;
-                }
-                while (pos < count) {
-                    result = f(result, array[pos]);
-                    pos++;
-                }
-                return result;
-            }
-        }
-        return initial;
-    }
-    ts.reduceLeft = reduceLeft;
-    function reduceRight(array, f, initial) {
-        if (array) {
-            var pos = array.length - 1;
-            if (pos >= 0) {
-                var result = void 0;
-                if (arguments.length <= 2) {
-                    result = array[pos];
-                    pos--;
-                }
-                else {
-                    result = initial;
-                }
-                while (pos >= 0) {
-                    result = f(result, array[pos]);
-                    pos--;
-                }
-                return result;
-            }
-        }
-        return initial;
-    }
-    ts.reduceRight = reduceRight;
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-    function hasProperty(map, key) {
-        return hasOwnProperty.call(map, key);
-    }
-    ts.hasProperty = hasProperty;
-    function getKeys(map) {
-        var keys = [];
-        for (var key in map) {
-            keys.push(key);
-        }
-        return keys;
-    }
-    ts.getKeys = getKeys;
-    function getProperty(map, key) {
-        return hasOwnProperty.call(map, key) ? map[key] : undefined;
-    }
-    ts.getProperty = getProperty;
-    function isEmpty(map) {
-        for (var id in map) {
-            if (hasProperty(map, id)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.isEmpty = isEmpty;
-    function clone(object) {
-        var result = {};
-        for (var id in object) {
-            result[id] = object[id];
-        }
-        return result;
-    }
-    ts.clone = clone;
-    function extend(first, second) {
-        var result = {};
-        for (var id in first) {
-            result[id] = first[id];
-        }
-        for (var id in second) {
-            if (!hasProperty(result, id)) {
-                result[id] = second[id];
-            }
-        }
-        return result;
-    }
-    ts.extend = extend;
-    function forEachValue(map, callback) {
-        var result;
-        for (var id in map) {
-            if (result = callback(map[id]))
-                break;
-        }
-        return result;
-    }
-    ts.forEachValue = forEachValue;
-    function forEachKey(map, callback) {
-        var result;
-        for (var id in map) {
-            if (result = callback(id))
-                break;
-        }
-        return result;
-    }
-    ts.forEachKey = forEachKey;
-    function lookUp(map, key) {
-        return hasProperty(map, key) ? map[key] : undefined;
-    }
-    ts.lookUp = lookUp;
-    function copyMap(source, target) {
-        for (var p in source) {
-            target[p] = source[p];
-        }
-    }
-    ts.copyMap = copyMap;
-    function arrayToMap(array, makeKey) {
-        var result = {};
-        forEach(array, function (value) {
-            result[makeKey(value)] = value;
-        });
-        return result;
-    }
-    ts.arrayToMap = arrayToMap;
-    function reduceProperties(map, callback, initial) {
-        var result = initial;
-        if (map) {
-            for (var key in map) {
-                if (hasProperty(map, key)) {
-                    result = callback(result, map[key], String(key));
-                }
-            }
-        }
-        return result;
-    }
-    ts.reduceProperties = reduceProperties;
-    function isArray(value) {
-        return Array.isArray ? Array.isArray(value) : value instanceof Array;
-    }
-    ts.isArray = isArray;
-    function memoize(callback) {
-        var value;
-        return function () {
-            if (callback) {
-                value = callback();
-                callback = undefined;
-            }
-            return value;
-        };
-    }
-    ts.memoize = memoize;
-    function formatStringFromArgs(text, args, baseIndex) {
-        baseIndex = baseIndex || 0;
-        return text.replace(/{(\d+)}/g, function (match, index) { return args[+index + baseIndex]; });
-    }
-    ts.localizedDiagnosticMessages = undefined;
-    function getLocaleSpecificMessage(message) {
-        return ts.localizedDiagnosticMessages && ts.localizedDiagnosticMessages[message.key]
-            ? ts.localizedDiagnosticMessages[message.key]
-            : message.message;
-    }
-    ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
-    function createFileDiagnostic(file, start, length, message) {
-        var end = start + length;
-        Debug.assert(start >= 0, "start must be non-negative, is " + start);
-        Debug.assert(length >= 0, "length must be non-negative, is " + length);
-        if (file) {
-            Debug.assert(start <= file.text.length, "start must be within the bounds of the file. " + start + " > " + file.text.length);
-            Debug.assert(end <= file.text.length, "end must be the bounds of the file. " + end + " > " + file.text.length);
-        }
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 4) {
-            text = formatStringFromArgs(text, arguments, 4);
-        }
-        return {
-            file: file,
-            start: start,
-            length: length,
-            messageText: text,
-            category: message.category,
-            code: message.code
-        };
-    }
-    ts.createFileDiagnostic = createFileDiagnostic;
-    function formatMessage(dummy, message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 2) {
-            text = formatStringFromArgs(text, arguments, 2);
-        }
-        return text;
-    }
-    ts.formatMessage = formatMessage;
-    function createCompilerDiagnostic(message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 1) {
-            text = formatStringFromArgs(text, arguments, 1);
-        }
-        return {
-            file: undefined,
-            start: undefined,
-            length: undefined,
-            messageText: text,
-            category: message.category,
-            code: message.code
-        };
-    }
-    ts.createCompilerDiagnostic = createCompilerDiagnostic;
-    function chainDiagnosticMessages(details, message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 2) {
-            text = formatStringFromArgs(text, arguments, 2);
-        }
-        return {
-            messageText: text,
-            category: message.category,
-            code: message.code,
-            next: details
-        };
-    }
-    ts.chainDiagnosticMessages = chainDiagnosticMessages;
-    function concatenateDiagnosticMessageChains(headChain, tailChain) {
-        var lastChain = headChain;
-        while (lastChain.next) {
-            lastChain = lastChain.next;
-        }
-        lastChain.next = tailChain;
-        return headChain;
-    }
-    ts.concatenateDiagnosticMessageChains = concatenateDiagnosticMessageChains;
-    function compareValues(a, b) {
-        if (a === b)
-            return 0;
-        if (a === undefined)
-            return -1;
-        if (b === undefined)
-            return 1;
-        return a < b ? -1 : 1;
-    }
-    ts.compareValues = compareValues;
-    function getDiagnosticFileName(diagnostic) {
-        return diagnostic.file ? diagnostic.file.fileName : undefined;
-    }
-    function compareDiagnostics(d1, d2) {
-        return compareValues(getDiagnosticFileName(d1), getDiagnosticFileName(d2)) ||
-            compareValues(d1.start, d2.start) ||
-            compareValues(d1.length, d2.length) ||
-            compareValues(d1.code, d2.code) ||
-            compareMessageText(d1.messageText, d2.messageText) ||
-            0;
-    }
-    ts.compareDiagnostics = compareDiagnostics;
-    function compareMessageText(text1, text2) {
-        while (text1 && text2) {
-            var string1 = typeof text1 === "string" ? text1 : text1.messageText;
-            var string2 = typeof text2 === "string" ? text2 : text2.messageText;
-            var res = compareValues(string1, string2);
-            if (res) {
-                return res;
-            }
-            text1 = typeof text1 === "string" ? undefined : text1.next;
-            text2 = typeof text2 === "string" ? undefined : text2.next;
-        }
-        if (!text1 && !text2) {
-            return 0;
-        }
-        return text1 ? 1 : -1;
-    }
-    function sortAndDeduplicateDiagnostics(diagnostics) {
-        return deduplicateSortedDiagnostics(diagnostics.sort(compareDiagnostics));
-    }
-    ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
-    function deduplicateSortedDiagnostics(diagnostics) {
-        if (diagnostics.length < 2) {
-            return diagnostics;
-        }
-        var newDiagnostics = [diagnostics[0]];
-        var previousDiagnostic = diagnostics[0];
-        for (var i = 1; i < diagnostics.length; i++) {
-            var currentDiagnostic = diagnostics[i];
-            var isDupe = compareDiagnostics(currentDiagnostic, previousDiagnostic) === 0;
-            if (!isDupe) {
-                newDiagnostics.push(currentDiagnostic);
-                previousDiagnostic = currentDiagnostic;
-            }
-        }
-        return newDiagnostics;
-    }
-    ts.deduplicateSortedDiagnostics = deduplicateSortedDiagnostics;
-    function normalizeSlashes(path) {
-        return path.replace(/\\/g, "/");
-    }
-    ts.normalizeSlashes = normalizeSlashes;
-    function getRootLength(path) {
-        if (path.charCodeAt(0) === 47) {
-            if (path.charCodeAt(1) !== 47)
-                return 1;
-            var p1 = path.indexOf("/", 2);
-            if (p1 < 0)
-                return 2;
-            var p2 = path.indexOf("/", p1 + 1);
-            if (p2 < 0)
-                return p1 + 1;
-            return p2 + 1;
-        }
-        if (path.charCodeAt(1) === 58) {
-            if (path.charCodeAt(2) === 47)
-                return 3;
-            return 2;
-        }
-        if (path.lastIndexOf("file:///", 0) === 0) {
-            return "file:///".length;
-        }
-        var idx = path.indexOf("://");
-        if (idx !== -1) {
-            return idx + "://".length;
-        }
-        return 0;
-    }
-    ts.getRootLength = getRootLength;
-    ts.directorySeparator = "/";
-    function getNormalizedParts(normalizedSlashedPath, rootLength) {
-        var parts = normalizedSlashedPath.substr(rootLength).split(ts.directorySeparator);
-        var normalized = [];
-        for (var _i = 0, parts_1 = parts; _i < parts_1.length; _i++) {
-            var part = parts_1[_i];
-            if (part !== ".") {
-                if (part === ".." && normalized.length > 0 && lastOrUndefined(normalized) !== "..") {
-                    normalized.pop();
-                }
-                else {
-                    if (part) {
-                        normalized.push(part);
-                    }
-                }
-            }
-        }
-        return normalized;
-    }
-    function normalizePath(path) {
-        path = normalizeSlashes(path);
-        var rootLength = getRootLength(path);
-        var normalized = getNormalizedParts(path, rootLength);
-        return path.substr(0, rootLength) + normalized.join(ts.directorySeparator);
-    }
-    ts.normalizePath = normalizePath;
-    function getDirectoryPath(path) {
-        return path.substr(0, Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator)));
-    }
-    ts.getDirectoryPath = getDirectoryPath;
-    function isUrl(path) {
-        return path && !isRootedDiskPath(path) && path.indexOf("://") !== -1;
-    }
-    ts.isUrl = isUrl;
-    function isRootedDiskPath(path) {
-        return getRootLength(path) !== 0;
-    }
-    ts.isRootedDiskPath = isRootedDiskPath;
-    function normalizedPathComponents(path, rootLength) {
-        var normalizedParts = getNormalizedParts(path, rootLength);
-        return [path.substr(0, rootLength)].concat(normalizedParts);
-    }
-    function getNormalizedPathComponents(path, currentDirectory) {
-        path = normalizeSlashes(path);
-        var rootLength = getRootLength(path);
-        if (rootLength === 0) {
-            path = combinePaths(normalizeSlashes(currentDirectory), path);
-            rootLength = getRootLength(path);
-        }
-        return normalizedPathComponents(path, rootLength);
-    }
-    ts.getNormalizedPathComponents = getNormalizedPathComponents;
-    function getNormalizedAbsolutePath(fileName, currentDirectory) {
-        return getNormalizedPathFromPathComponents(getNormalizedPathComponents(fileName, currentDirectory));
-    }
-    ts.getNormalizedAbsolutePath = getNormalizedAbsolutePath;
-    function getNormalizedPathFromPathComponents(pathComponents) {
-        if (pathComponents && pathComponents.length) {
-            return pathComponents[0] + pathComponents.slice(1).join(ts.directorySeparator);
-        }
-    }
-    ts.getNormalizedPathFromPathComponents = getNormalizedPathFromPathComponents;
-    function getNormalizedPathComponentsOfUrl(url) {
-        var urlLength = url.length;
-        var rootLength = url.indexOf("://") + "://".length;
-        while (rootLength < urlLength) {
-            if (url.charCodeAt(rootLength) === 47) {
-                rootLength++;
-            }
-            else {
-                break;
-            }
-        }
-        if (rootLength === urlLength) {
-            return [url];
-        }
-        var indexOfNextSlash = url.indexOf(ts.directorySeparator, rootLength);
-        if (indexOfNextSlash !== -1) {
-            rootLength = indexOfNextSlash + 1;
-            return normalizedPathComponents(url, rootLength);
-        }
-        else {
-            return [url + ts.directorySeparator];
-        }
-    }
-    function getNormalizedPathOrUrlComponents(pathOrUrl, currentDirectory) {
-        if (isUrl(pathOrUrl)) {
-            return getNormalizedPathComponentsOfUrl(pathOrUrl);
-        }
-        else {
-            return getNormalizedPathComponents(pathOrUrl, currentDirectory);
-        }
-    }
-    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
-        var pathComponents = getNormalizedPathOrUrlComponents(relativeOrAbsolutePath, currentDirectory);
-        var directoryComponents = getNormalizedPathOrUrlComponents(directoryPathOrUrl, currentDirectory);
-        if (directoryComponents.length > 1 && lastOrUndefined(directoryComponents) === "") {
-            directoryComponents.length--;
-        }
-        var joinStartIndex;
-        for (joinStartIndex = 0; joinStartIndex < pathComponents.length && joinStartIndex < directoryComponents.length; joinStartIndex++) {
-            if (getCanonicalFileName(directoryComponents[joinStartIndex]) !== getCanonicalFileName(pathComponents[joinStartIndex])) {
-                break;
-            }
-        }
-        if (joinStartIndex) {
-            var relativePath = "";
-            var relativePathComponents = pathComponents.slice(joinStartIndex, pathComponents.length);
-            for (; joinStartIndex < directoryComponents.length; joinStartIndex++) {
-                if (directoryComponents[joinStartIndex] !== "") {
-                    relativePath = relativePath + ".." + ts.directorySeparator;
-                }
-            }
-            return relativePath + relativePathComponents.join(ts.directorySeparator);
-        }
-        var absolutePath = getNormalizedPathFromPathComponents(pathComponents);
-        if (isAbsolutePathAnUrl && isRootedDiskPath(absolutePath)) {
-            absolutePath = "file:///" + absolutePath;
-        }
-        return absolutePath;
-    }
-    ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
-    function getBaseFileName(path) {
-        if (path === undefined) {
-            return undefined;
-        }
-        var i = path.lastIndexOf(ts.directorySeparator);
-        return i < 0 ? path : path.substring(i + 1);
-    }
-    ts.getBaseFileName = getBaseFileName;
-    function combinePaths(path1, path2) {
-        if (!(path1 && path1.length))
-            return path2;
-        if (!(path2 && path2.length))
-            return path1;
-        if (getRootLength(path2) !== 0)
-            return path2;
-        if (path1.charAt(path1.length - 1) === ts.directorySeparator)
-            return path1 + path2;
-        return path1 + ts.directorySeparator + path2;
-    }
-    ts.combinePaths = combinePaths;
-    function fileExtensionIs(path, extension) {
-        var pathLen = path.length;
-        var extLen = extension.length;
-        return pathLen > extLen && path.substr(pathLen - extLen, extLen) === extension;
-    }
-    ts.fileExtensionIs = fileExtensionIs;
-    function ensureScriptKind(fileName, scriptKind) {
-        return (scriptKind || getScriptKindFromFileName(fileName)) || 3;
-    }
-    ts.ensureScriptKind = ensureScriptKind;
-    function getScriptKindFromFileName(fileName) {
-        var ext = fileName.substr(fileName.lastIndexOf("."));
-        switch (ext.toLowerCase()) {
-            case ".js":
-                return 1;
-            case ".jsx":
-                return 2;
-            case ".ts":
-                return 3;
-            case ".tsx":
-                return 4;
-            default:
-                return 0;
-        }
-    }
-    ts.getScriptKindFromFileName = getScriptKindFromFileName;
-    ts.supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
-    ts.supportedJavascriptExtensions = [".js", ".jsx"];
-    var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
-    function getSupportedExtensions(options) {
-        return options && options.allowJs ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
-    }
-    ts.getSupportedExtensions = getSupportedExtensions;
-    function isSupportedSourceFileName(fileName, compilerOptions) {
-        if (!fileName) {
-            return false;
-        }
-        for (var _i = 0, _a = getSupportedExtensions(compilerOptions); _i < _a.length; _i++) {
-            var extension = _a[_i];
-            if (fileExtensionIs(fileName, extension)) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.isSupportedSourceFileName = isSupportedSourceFileName;
-    var extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
-    function removeFileExtension(path) {
-        for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
-            var ext = extensionsToRemove_1[_i];
-            if (fileExtensionIs(path, ext)) {
-                return path.substr(0, path.length - ext.length);
-            }
-        }
-        return path;
-    }
-    ts.removeFileExtension = removeFileExtension;
-    function Symbol(flags, name) {
-        this.flags = flags;
-        this.name = name;
-        this.declarations = undefined;
-    }
-    function Type(checker, flags) {
-        this.flags = flags;
-    }
-    function Signature(checker) {
-    }
-    function Node(kind, pos, end) {
-        this.kind = kind;
-        this.pos = pos;
-        this.end = end;
-        this.flags = 0;
-        this.parent = undefined;
-    }
-    ts.objectAllocator = {
-        getNodeConstructor: function () { return Node; },
-        getSourceFileConstructor: function () { return Node; },
-        getSymbolConstructor: function () { return Symbol; },
-        getTypeConstructor: function () { return Type; },
-        getSignatureConstructor: function () { return Signature; }
-    };
-    var Debug;
-    (function (Debug) {
-        var currentAssertionLevel = 0;
-        function shouldAssert(level) {
-            return currentAssertionLevel >= level;
-        }
-        Debug.shouldAssert = shouldAssert;
-        function assert(expression, message, verboseDebugInfo) {
-            if (!expression) {
-                var verboseDebugString = "";
-                if (verboseDebugInfo) {
-                    verboseDebugString = "\r\nVerbose Debug Information: " + verboseDebugInfo();
-                }
-                debugger;
-                throw new Error("Debug Failure. False expression: " + (message || "") + verboseDebugString);
-            }
-        }
-        Debug.assert = assert;
-        function fail(message) {
-            Debug.assert(false, message);
-        }
-        Debug.fail = fail;
-    })(Debug = ts.Debug || (ts.Debug = {}));
-    function copyListRemovingItem(item, list) {
-        var copiedList = [];
-        for (var _i = 0, list_1 = list; _i < list_1.length; _i++) {
-            var e = list_1[_i];
-            if (e !== item) {
-                copiedList.push(e);
-            }
-        }
-        return copiedList;
-    }
-    ts.copyListRemovingItem = copyListRemovingItem;
-    function createGetCanonicalFileName(useCaseSensitivefileNames) {
-        return useCaseSensitivefileNames
-            ? (function (fileName) { return fileName; })
-            : (function (fileName) { return fileName.toLowerCase(); });
-    }
-    ts.createGetCanonicalFileName = createGetCanonicalFileName;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.sys = (function () {
-        function getWScriptSystem() {
-            var fso = new ActiveXObject("Scripting.FileSystemObject");
-            var fileStream = new ActiveXObject("ADODB.Stream");
-            fileStream.Type = 2;
-            var binaryStream = new ActiveXObject("ADODB.Stream");
-            binaryStream.Type = 1;
-            var args = [];
-            for (var i = 0; i < WScript.Arguments.length; i++) {
-                args[i] = WScript.Arguments.Item(i);
-            }
-            function readFile(fileName, encoding) {
-                if (!fso.FileExists(fileName)) {
-                    return undefined;
-                }
-                fileStream.Open();
-                try {
-                    if (encoding) {
-                        fileStream.Charset = encoding;
-                        fileStream.LoadFromFile(fileName);
-                    }
-                    else {
-                        fileStream.Charset = "x-ansi";
-                        fileStream.LoadFromFile(fileName);
-                        var bom = fileStream.ReadText(2) || "";
-                        fileStream.Position = 0;
-                        fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
-                    }
-                    return fileStream.ReadText();
-                }
-                catch (e) {
-                    throw e;
-                }
-                finally {
-                    fileStream.Close();
-                }
-            }
-            function writeFile(fileName, data, writeByteOrderMark) {
-                fileStream.Open();
-                binaryStream.Open();
-                try {
-                    fileStream.Charset = "utf-8";
-                    fileStream.WriteText(data);
-                    if (writeByteOrderMark) {
-                        fileStream.Position = 0;
-                    }
-                    else {
-                        fileStream.Position = 3;
-                    }
-                    fileStream.CopyTo(binaryStream);
-                    binaryStream.SaveToFile(fileName, 2);
-                }
-                finally {
-                    binaryStream.Close();
-                    fileStream.Close();
-                }
-            }
-            function getCanonicalPath(path) {
-                return path.toLowerCase();
-            }
-            function getNames(collection) {
-                var result = [];
-                for (var e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
-                    result.push(e.item().Name);
-                }
-                return result.sort();
-            }
-            function getDirectories(path) {
-                var folder = fso.GetFolder(path);
-                return getNames(folder.subfolders);
-            }
-            function readDirectory(path, extension, exclude) {
-                var result = [];
-                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
-                visitDirectory(path);
-                return result;
-                function visitDirectory(path) {
-                    var folder = fso.GetFolder(path || ".");
-                    var files = getNames(folder.files);
-                    for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
-                        var current = files_1[_i];
-                        var name_1 = ts.combinePaths(path, current);
-                        if ((!extension || ts.fileExtensionIs(name_1, extension)) && !ts.contains(exclude, getCanonicalPath(name_1))) {
-                            result.push(name_1);
-                        }
-                    }
-                    var subfolders = getNames(folder.subfolders);
-                    for (var _a = 0, subfolders_1 = subfolders; _a < subfolders_1.length; _a++) {
-                        var current = subfolders_1[_a];
-                        var name_2 = ts.combinePaths(path, current);
-                        if (!ts.contains(exclude, getCanonicalPath(name_2))) {
-                            visitDirectory(name_2);
-                        }
-                    }
-                }
-            }
-            return {
-                args: args,
-                newLine: "\r\n",
-                useCaseSensitiveFileNames: false,
-                write: function (s) {
-                    WScript.StdOut.Write(s);
-                },
-                readFile: readFile,
-                writeFile: writeFile,
-                resolvePath: function (path) {
-                    return fso.GetAbsolutePathName(path);
-                },
-                fileExists: function (path) {
-                    return fso.FileExists(path);
-                },
-                directoryExists: function (path) {
-                    return fso.FolderExists(path);
-                },
-                createDirectory: function (directoryName) {
-                    if (!this.directoryExists(directoryName)) {
-                        fso.CreateFolder(directoryName);
-                    }
-                },
-                getExecutingFilePath: function () {
-                    return WScript.ScriptFullName;
-                },
-                getCurrentDirectory: function () {
-                    return new ActiveXObject("WScript.Shell").CurrentDirectory;
-                },
-                getDirectories: getDirectories,
-                readDirectory: readDirectory,
-                exit: function (exitCode) {
-                    try {
-                        WScript.Quit(exitCode);
-                    }
-                    catch (e) {
-                    }
-                }
-            };
-        }
-        function getNodeSystem() {
-            var _fs = require("fs");
-            var _path = require("path");
-            var _os = require("os");
-            var _crypto = require("crypto");
-            var useNonPollingWatchers = process.env["TSC_NONPOLLING_WATCHER"];
-            function createWatchedFileSet() {
-                var dirWatchers = {};
-                var fileWatcherCallbacks = {};
-                return { addFile: addFile, removeFile: removeFile };
-                function reduceDirWatcherRefCountForFile(fileName) {
-                    var dirName = ts.getDirectoryPath(fileName);
-                    if (ts.hasProperty(dirWatchers, dirName)) {
-                        var watcher = dirWatchers[dirName];
-                        watcher.referenceCount -= 1;
-                        if (watcher.referenceCount <= 0) {
-                            watcher.close();
-                            delete dirWatchers[dirName];
-                        }
-                    }
-                }
-                function addDirWatcher(dirPath) {
-                    if (ts.hasProperty(dirWatchers, dirPath)) {
-                        var watcher_1 = dirWatchers[dirPath];
-                        watcher_1.referenceCount += 1;
-                        return;
-                    }
-                    var watcher = _fs.watch(dirPath, { persistent: true }, function (eventName, relativeFileName) { return fileEventHandler(eventName, relativeFileName, dirPath); });
-                    watcher.referenceCount = 1;
-                    dirWatchers[dirPath] = watcher;
-                    return;
-                }
-                function addFileWatcherCallback(filePath, callback) {
-                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
-                        fileWatcherCallbacks[filePath].push(callback);
-                    }
-                    else {
-                        fileWatcherCallbacks[filePath] = [callback];
-                    }
-                }
-                function addFile(fileName, callback) {
-                    addFileWatcherCallback(fileName, callback);
-                    addDirWatcher(ts.getDirectoryPath(fileName));
-                    return { fileName: fileName, callback: callback };
-                }
-                function removeFile(watchedFile) {
-                    removeFileWatcherCallback(watchedFile.fileName, watchedFile.callback);
-                    reduceDirWatcherRefCountForFile(watchedFile.fileName);
-                }
-                function removeFileWatcherCallback(filePath, callback) {
-                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
-                        var newCallbacks = ts.copyListRemovingItem(callback, fileWatcherCallbacks[filePath]);
-                        if (newCallbacks.length === 0) {
-                            delete fileWatcherCallbacks[filePath];
-                        }
-                        else {
-                            fileWatcherCallbacks[filePath] = newCallbacks;
-                        }
-                    }
-                }
-                function fileEventHandler(eventName, relativeFileName, baseDirPath) {
-                    var fileName = typeof relativeFileName !== "string"
-                        ? undefined
-                        : ts.getNormalizedAbsolutePath(relativeFileName, baseDirPath);
-                    if ((eventName === "change" || eventName === "rename") && ts.hasProperty(fileWatcherCallbacks, fileName)) {
-                        for (var _i = 0, _a = fileWatcherCallbacks[fileName]; _i < _a.length; _i++) {
-                            var fileCallback = _a[_i];
-                            fileCallback(fileName);
-                        }
-                    }
-                }
-            }
-            var watchedFileSet = createWatchedFileSet();
-            function isNode4OrLater() {
-                return parseInt(process.version.charAt(1)) >= 4;
-            }
-            var platform = _os.platform();
-            var useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
-            function readFile(fileName, encoding) {
-                if (!fileExists(fileName)) {
-                    return undefined;
-                }
-                var buffer = _fs.readFileSync(fileName);
-                var len = buffer.length;
-                if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
-                    len &= ~1;
-                    for (var i = 0; i < len; i += 2) {
-                        var temp = buffer[i];
-                        buffer[i] = buffer[i + 1];
-                        buffer[i + 1] = temp;
-                    }
-                    return buffer.toString("utf16le", 2);
-                }
-                if (len >= 2 && buffer[0] === 0xFF && buffer[1] === 0xFE) {
-                    return buffer.toString("utf16le", 2);
-                }
-                if (len >= 3 && buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
-                    return buffer.toString("utf8", 3);
-                }
-                return buffer.toString("utf8");
-            }
-            function writeFile(fileName, data, writeByteOrderMark) {
-                if (writeByteOrderMark) {
-                    data = "\uFEFF" + data;
-                }
-                var fd;
-                try {
-                    fd = _fs.openSync(fileName, "w");
-                    _fs.writeSync(fd, data, undefined, "utf8");
-                }
-                finally {
-                    if (fd !== undefined) {
-                        _fs.closeSync(fd);
-                    }
-                }
-            }
-            function getCanonicalPath(path) {
-                return useCaseSensitiveFileNames ? path : path.toLowerCase();
-            }
-            function fileSystemEntryExists(path, entryKind) {
-                try {
-                    var stat = _fs.statSync(path);
-                    switch (entryKind) {
-                        case 0: return stat.isFile();
-                        case 1: return stat.isDirectory();
-                    }
-                }
-                catch (e) {
-                    return false;
-                }
-            }
-            function fileExists(path) {
-                return fileSystemEntryExists(path, 0);
-            }
-            function directoryExists(path) {
-                return fileSystemEntryExists(path, 1);
-            }
-            function getDirectories(path) {
-                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1); });
-            }
-            function readDirectory(path, extension, exclude) {
-                var result = [];
-                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
-                visitDirectory(path);
-                return result;
-                function visitDirectory(path) {
-                    var files = _fs.readdirSync(path || ".").sort();
-                    var directories = [];
-                    for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
-                        var current = files_2[_i];
-                        if (current === "." || current === "..") {
-                            continue;
-                        }
-                        var name_3 = ts.combinePaths(path, current);
-                        if (!ts.contains(exclude, getCanonicalPath(name_3))) {
-                            var stat = _fs.statSync(name_3);
-                            if (stat.isFile()) {
-                                if (!extension || ts.fileExtensionIs(name_3, extension)) {
-                                    result.push(name_3);
-                                }
-                            }
-                            else if (stat.isDirectory()) {
-                                directories.push(name_3);
-                            }
-                        }
-                    }
-                    for (var _a = 0, directories_1 = directories; _a < directories_1.length; _a++) {
-                        var current = directories_1[_a];
-                        visitDirectory(current);
-                    }
-                }
-            }
-            return {
-                args: process.argv.slice(2),
-                newLine: _os.EOL,
-                useCaseSensitiveFileNames: useCaseSensitiveFileNames,
-                write: function (s) {
-                    process.stdout.write(s);
-                },
-                readFile: readFile,
-                writeFile: writeFile,
-                watchFile: function (fileName, callback) {
-                    if (useNonPollingWatchers) {
-                        var watchedFile_1 = watchedFileSet.addFile(fileName, callback);
-                        return {
-                            close: function () { return watchedFileSet.removeFile(watchedFile_1); }
-                        };
-                    }
-                    else {
-                        _fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
-                        return {
-                            close: function () { return _fs.unwatchFile(fileName, fileChanged); }
-                        };
-                    }
-                    function fileChanged(curr, prev) {
-                        if (+curr.mtime <= +prev.mtime) {
-                            return;
-                        }
-                        callback(fileName);
-                    }
-                },
-                watchDirectory: function (directoryName, callback, recursive) {
-                    var options;
-                    if (isNode4OrLater() && (process.platform === "win32" || process.platform === "darwin")) {
-                        options = { persistent: true, recursive: !!recursive };
-                    }
-                    else {
-                        options = { persistent: true };
-                    }
-                    return _fs.watch(directoryName, options, function (eventName, relativeFileName) {
-                        if (eventName === "rename") {
-                            callback(!relativeFileName ? relativeFileName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
-                        }
-                        ;
-                    });
-                },
-                resolvePath: function (path) {
-                    return _path.resolve(path);
-                },
-                fileExists: fileExists,
-                directoryExists: directoryExists,
-                createDirectory: function (directoryName) {
-                    if (!this.directoryExists(directoryName)) {
-                        _fs.mkdirSync(directoryName);
-                    }
-                },
-                getExecutingFilePath: function () {
-                    return __filename;
-                },
-                getCurrentDirectory: function () {
-                    return process.cwd();
-                },
-                getDirectories: getDirectories,
-                readDirectory: readDirectory,
-                getModifiedTime: function (path) {
-                    try {
-                        return _fs.statSync(path).mtime;
-                    }
-                    catch (e) {
-                        return undefined;
-                    }
-                },
-                createHash: function (data) {
-                    var hash = _crypto.createHash("md5");
-                    hash.update(data);
-                    return hash.digest("hex");
-                },
-                getMemoryUsage: function () {
-                    if (global.gc) {
-                        global.gc();
-                    }
-                    return process.memoryUsage().heapUsed;
-                },
-                exit: function (exitCode) {
-                    process.exit(exitCode);
-                },
-                realpath: function (path) {
-                    return _fs.realpathSync(path);
-                }
-            };
-        }
-        function getChakraSystem() {
-            var realpath = ChakraHost.realpath && (function (path) { return ChakraHost.realpath(path); });
-            return {
-                newLine: ChakraHost.newLine || "\r\n",
-                args: ChakraHost.args,
-                useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
-                write: ChakraHost.echo,
-                readFile: function (path, encoding) {
-                    return ChakraHost.readFile(path);
-                },
-                writeFile: function (path, data, writeByteOrderMark) {
-                    if (writeByteOrderMark) {
-                        data = "\uFEFF" + data;
-                    }
-                    ChakraHost.writeFile(path, data);
-                },
-                resolvePath: ChakraHost.resolvePath,
-                fileExists: ChakraHost.fileExists,
-                directoryExists: ChakraHost.directoryExists,
-                createDirectory: ChakraHost.createDirectory,
-                getExecutingFilePath: function () { return ChakraHost.executingFile; },
-                getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
-                getDirectories: ChakraHost.getDirectories,
-                readDirectory: ChakraHost.readDirectory,
-                exit: ChakraHost.quit,
-                realpath: realpath
-            };
-        }
-        if (typeof ChakraHost !== "undefined") {
-            return getChakraSystem();
-        }
-        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
-            return getWScriptSystem();
-        }
-        else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
-            return getNodeSystem();
-        }
-        else {
-            return undefined;
-        }
-    })();
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.Diagnostics = {
-        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
-        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
-        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
-        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
-        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
-        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
-        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
-        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
-        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
-        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
-        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
-        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
-        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
-        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
-        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
-        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
-        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
-        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
-        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
-        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
-        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
-        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
-        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
-        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
-        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
-        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
-        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
-        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
-        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
-        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
-        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
-        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
-        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
-        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
-        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
-        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
-        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
-        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
-        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
-        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
-        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
-        Type_0_is_not_a_valid_async_function_return_type: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_1055", message: "Type '{0}' is not a valid async function return type." },
-        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
-        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
-        Operand_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "Operand_for_await_does_not_have_a_valid_callable_then_member_1058", message: "Operand for 'await' does not have a valid callable 'then' member." },
-        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: { code: 1059, category: ts.DiagnosticCategory.Error, key: "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059", message: "Return expression in async function does not have a valid callable 'then' member." },
-        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: { code: 1060, category: ts.DiagnosticCategory.Error, key: "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060", message: "Expression body for async arrow function does not have a valid callable 'then' member." },
-        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
-        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
-        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
-        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
-        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
-        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
-        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
-        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
-        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
-        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
-        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher." },
-        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
-        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
-        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
-        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
-        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
-        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
-        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
-        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
-        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
-        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
-        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
-        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
-        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
-        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
-        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
-        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
-        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
-        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
-        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
-        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
-        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
-        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'" },
-        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
-        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
-        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
-        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
-        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
-        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
-        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
-        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
-        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
-        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
-        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
-        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
-        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
-        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
-        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
-        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
-        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
-        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
-        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
-        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
-        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
-        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
-        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
-        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
-        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
-        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
-        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
-        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
-        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
-        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
-        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
-        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
-        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
-        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
-        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
-        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
-        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
-        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
-        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
-        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
-        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
-        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
-        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
-        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
-        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
-        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
-        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
-        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
-        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
-        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
-        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
-        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
-        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
-        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
-        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
-        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
-        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
-        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
-        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
-        A_parameter_property_may_not_be_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_a_binding_pattern_1187", message: "A parameter property may not be a binding pattern." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
-        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
-        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
-        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
-        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
-        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
-        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
-        Catch_clause_variable_name_must_be_an_identifier: { code: 1195, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_name_must_be_an_identifier_1195", message: "Catch clause variable name must be an identifier." },
-        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
-        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
-        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
-        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
-        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
-        Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
-        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
-        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
-        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
-        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
-        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
-        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
-        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
-        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
-        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
-        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
-        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
-        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
-        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
-        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
-        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
-        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
-        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
-        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
-        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
-        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
-        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
-        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
-        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
-        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
-        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
-        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
-        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
-        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
-        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
-        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
-        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
-        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
-        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
-        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
-        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
-        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
-        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
-        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
-        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
-        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
-        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
-        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
-        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
-        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
-        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
-        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
-        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
-        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
-        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
-        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
-        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
-        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
-        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
-        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
-        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
-        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
-        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
-        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
-        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
-        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
-        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
-        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
-        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
-        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
-        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
-        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
-        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
-        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
-        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
-        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
-        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
-        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
-        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
-        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
-        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
-        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
-        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
-        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
-        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
-        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
-        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
-        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
-        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
-        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
-        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
-        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
-        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
-        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
-        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
-        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
-        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
-        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
-        Supplied_parameters_do_not_match_any_signature_of_call_target: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Supplied_parameters_do_not_match_any_signature_of_call_target_2346", message: "Supplied parameters do not match any signature of call target." },
-        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
-        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
-        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_2349", message: "Cannot invoke an expression whose type lacks a call signature." },
-        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
-        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
-        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
-        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
-        No_best_common_type_exists_among_return_expressions: { code: 2354, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_return_expressions_2354", message: "No best common type exists among return expressions." },
-        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
-        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
-        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357", message: "The operand of an increment or decrement operator must be a variable, property or indexer." },
-        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
-        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
-        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
-        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter" },
-        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_of_assignment_expression_2364", message: "Invalid left-hand side of assignment expression." },
-        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
-        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
-        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'" },
-        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
-        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
-        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
-        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
-        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
-        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
-        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
-        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
-        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
-        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
-        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
-        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
-        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
-        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
-        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
-        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
-        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
-        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
-        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
-        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
-        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
-        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
-        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
-        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
-        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
-        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
-        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
-        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
-        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
-        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
-        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
-        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
-        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
-        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
-        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
-        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
-        Invalid_left_hand_side_in_for_in_statement: { code: 2406, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_in_statement_2406", message: "Invalid left-hand side in 'for...in' statement." },
-        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
-        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
-        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class" },
-        All_symbols_within_a_with_block_will_be_resolved_to_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "All_symbols_within_a_with_block_will_be_resolved_to_any_2410", message: "All symbols within a 'with' block will be resolved to 'any'." },
-        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
-        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
-        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
-        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'" },
-        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
-        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
-        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
-        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
-        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
-        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
-        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'" },
-        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
-        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
-        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'" },
-        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
-        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged" },
-        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged" },
-        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
-        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
-        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name" },
-        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'" },
-        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
-        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'" },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
-        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
-        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
-        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
-        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
-        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
-        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
-        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
-        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: { code: 2449, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449", message: "The operand of an increment or decrement operator cannot be a constant or a read-only property." },
-        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450", message: "Left-hand side of assignment expression cannot be a constant or a read-only property." },
-        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
-        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
-        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
-        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
-        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
-        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
-        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'" },
-        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
-        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
-        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
-        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
-        A_rest_element_must_be_last_in_an_array_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462", message: "A rest element must be last in an array destructuring pattern" },
-        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
-        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
-        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
-        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
-        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
-        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
-        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
-        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
-        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
-        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
-        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
-        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
-        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
-        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
-        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
-        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
-        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
-        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
-        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
-        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
-        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'" },
-        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2485, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485", message: "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2486, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486", message: "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property." },
-        Invalid_left_hand_side_in_for_of_statement: { code: 2487, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_of_statement_2487", message: "Invalid left-hand side in 'for...of' statement." },
-        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
-        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
-        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
-        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause" },
-        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
-        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
-        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
-        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
-        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
-        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
-        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
-        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
-        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
-        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
-        No_best_common_type_exists_among_yield_expressions: { code: 2504, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_yield_expressions_2504", message: "No best common type exists among yield expressions." },
-        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
-        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
-        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
-        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
-        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
-        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
-        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
-        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
-        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
-        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
-        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
-        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
-        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
-        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
-        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
-        The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_function_expression: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_2522", message: "The 'arguments' object cannot be referenced in an async arrow function. Consider using a standard async function expression." },
-        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
-        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
-        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
-        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
-        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
-        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
-        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
-        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
-        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
-        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
-        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
-        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
-        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
-        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
-        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'" },
-        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
-        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
-        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
-        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property" },
-        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property" },
-        Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: ts.DiagnosticCategory.Error, key: "Cannot_emit_namespaced_JSX_elements_in_React_2650", message: "Cannot emit namespaced JSX elements in React" },
-        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
-        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
-        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
-        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
-        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
-        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element" },
-        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'" },
-        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
-        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
-        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
-        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
-        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
-        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
-        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
-        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
-        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
-        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
-        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
-        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
-        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
-        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
-        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
-        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
-        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
-        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
-        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
-        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: { code: 2679, category: ts.DiagnosticCategory.Error, key: "A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void_2679", message: "A function that is called with the 'new' keyword cannot have a 'this' type that is 'void'." },
-        A_this_parameter_must_be_the_first_parameter: { code: 2680, category: ts.DiagnosticCategory.Error, key: "A_this_parameter_must_be_the_first_parameter_2680", message: "A 'this' parameter must be the first parameter." },
-        A_constructor_cannot_have_a_this_parameter: { code: 2681, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_have_a_this_parameter_2681", message: "A constructor cannot have a 'this' parameter." },
-        get_and_set_accessor_must_have_the_same_this_type: { code: 2682, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_this_type_2682", message: "'get' and 'set' accessor must have the same 'this' type." },
-        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
-        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
-        The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
-        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
-        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
-        Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
-        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4006, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4006", message: "Type parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4008, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4008", message: "Type parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4010, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4010", message: "Type parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4012, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4012", message: "Type parameter '{0}' of public method from exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4014, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", message: "Type parameter '{0}' of method from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4016, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", message: "Type parameter '{0}' of exported function has or is using private name '{1}'." },
-        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4019, category: ts.DiagnosticCategory.Error, key: "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", message: "Implements clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "Extends clause of exported interface '{0}' has or is using private name '{1}'." },
-        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4023, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", message: "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named." },
-        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: { code: 4024, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", message: "Exported variable '{0}' has or is using name '{1}' from private module '{2}'." },
-        Exported_variable_0_has_or_is_using_private_name_1: { code: 4025, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_private_name_1_4025", message: "Exported variable '{0}' has or is using private name '{1}'." },
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4026, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026", message: "Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4027, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4027", message: "Public static property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
-        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4028, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_private_name_1_4028", message: "Public static property '{0}' of exported class has or is using private name '{1}'." },
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4029, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029", message: "Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4030, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4030", message: "Public property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
-        Public_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4031, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_private_name_1_4031", message: "Public property '{0}' of exported class has or is using private name '{1}'." },
-        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4032, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4032", message: "Property '{0}' of exported interface has or is using name '{1}' from private module '{2}'." },
-        Property_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4033, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_private_name_1_4033", message: "Property '{0}' of exported interface has or is using private name '{1}'." },
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4034, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_4034", message: "Parameter '{0}' of public static property setter from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4035, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1_4035", message: "Parameter '{0}' of public static property setter from exported class has or is using private name '{1}'." },
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4036, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_4036", message: "Parameter '{0}' of public property setter from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4037, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1_4037", message: "Parameter '{0}' of public property setter from exported class has or is using private name '{1}'." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4038, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_externa_4038", message: "Return type of public static property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4039, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_4039", message: "Return type of public static property getter from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4040, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0_4040", message: "Return type of public static property getter from exported class has or is using private name '{0}'." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4041, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_modul_4041", message: "Return type of public property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4042, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_4042", message: "Return type of public property getter from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4043, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0_4043", message: "Return type of public property getter from exported class has or is using private name '{0}'." },
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4044, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_mod_4044", message: "Return type of constructor signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4045, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0_4045", message: "Return type of constructor signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4046, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4046", message: "Return type of call signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4047, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0_4047", message: "Return type of call signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4048, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4048", message: "Return type of index signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4049, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0_4049", message: "Return type of index signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4050, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module__4050", message: "Return type of public static method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4051, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4051", message: "Return type of public static method from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: { code: 4052, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0_4052", message: "Return type of public static method from exported class has or is using private name '{0}'." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4053, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_c_4053", message: "Return type of public method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4054, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4054", message: "Return type of public method from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: { code: 4055, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0_4055", message: "Return type of public method from exported class has or is using private name '{0}'." },
-        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4056, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4056", message: "Return type of method from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: { code: 4057, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0_4057", message: "Return type of method from exported interface has or is using private name '{0}'." },
-        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4058, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named_4058", message: "Return type of exported function has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: { code: 4059, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1_4059", message: "Return type of exported function has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_exported_function_has_or_is_using_private_name_0: { code: 4060, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_private_name_0_4060", message: "Return type of exported function has or is using private name '{0}'." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4061, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_can_4061", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4062, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2_4062", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: { code: 4063, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1_4063", message: "Parameter '{0}' of constructor from exported class has or is using private name '{1}'." },
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4064, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_mod_4064", message: "Parameter '{0}' of constructor signature from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4065, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4065", message: "Parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4066, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4066", message: "Parameter '{0}' of call signature from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4067, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4067", message: "Parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4068, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module__4068", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4069, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4069", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4070, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4070", message: "Parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4071, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_c_4071", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4072, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4072", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4073, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4073", message: "Parameter '{0}' of public method from exported class has or is using private name '{1}'." },
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4074, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4074", message: "Parameter '{0}' of method from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4075, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4075", message: "Parameter '{0}' of method from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4076, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4076", message: "Parameter '{0}' of exported function has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: { code: 4077, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2_4077", message: "Parameter '{0}' of exported function has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4078, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", message: "Parameter '{0}' of exported function has or is using private name '{1}'." },
-        Exported_type_alias_0_has_or_is_using_private_name_1: { code: 4081, category: ts.DiagnosticCategory.Error, key: "Exported_type_alias_0_has_or_is_using_private_name_1_4081", message: "Exported type alias '{0}' has or is using private name '{1}'." },
-        Default_export_of_the_module_has_or_is_using_private_name_0: { code: 4082, category: ts.DiagnosticCategory.Error, key: "Default_export_of_the_module_has_or_is_using_private_name_0_4082", message: "Default export of the module has or is using private name '{0}'." },
-        Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict: { code: 4090, category: ts.DiagnosticCategory.Message, key: "Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_t_4090", message: "Conflicting library definitions for '{0}' found at '{1}' and '{2}'. Copy the correct file to the 'typings' folder to resolve this conflict." },
-        The_current_host_does_not_support_the_0_option: { code: 5001, category: ts.DiagnosticCategory.Error, key: "The_current_host_does_not_support_the_0_option_5001", message: "The current host does not support the '{0}' option." },
-        Cannot_find_the_common_subdirectory_path_for_the_input_files: { code: 5009, category: ts.DiagnosticCategory.Error, key: "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", message: "Cannot find the common subdirectory path for the input files." },
-        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}" },
-        Unsupported_file_encoding: { code: 5013, category: ts.DiagnosticCategory.Error, key: "Unsupported_file_encoding_5013", message: "Unsupported file encoding." },
-        Failed_to_parse_file_0_Colon_1: { code: 5014, category: ts.DiagnosticCategory.Error, key: "Failed_to_parse_file_0_Colon_1_5014", message: "Failed to parse file '{0}': {1}." },
-        Unknown_compiler_option_0: { code: 5023, category: ts.DiagnosticCategory.Error, key: "Unknown_compiler_option_0_5023", message: "Unknown compiler option '{0}'." },
-        Compiler_option_0_requires_a_value_of_type_1: { code: 5024, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_requires_a_value_of_type_1_5024", message: "Compiler option '{0}' requires a value of type {1}." },
-        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}" },
-        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: { code: 5042, category: ts.DiagnosticCategory.Error, key: "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", message: "Option 'project' cannot be mixed with source files on a command line." },
-        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: { code: 5047, category: ts.DiagnosticCategory.Error, key: "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", message: "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher." },
-        Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: { code: 5051, category: ts.DiagnosticCategory.Error, key: "Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_prov_5051", message: "Option 'inlineSources' can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided." },
-        Option_0_cannot_be_specified_without_specifying_option_1: { code: 5052, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_without_specifying_option_1_5052", message: "Option '{0}' cannot be specified without specifying option '{1}'." },
-        Option_0_cannot_be_specified_with_option_1: { code: 5053, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_with_option_1_5053", message: "Option '{0}' cannot be specified with option '{1}'." },
-        A_tsconfig_json_file_is_already_defined_at_Colon_0: { code: 5054, category: ts.DiagnosticCategory.Error, key: "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", message: "A 'tsconfig.json' file is already defined at: '{0}'." },
-        Cannot_write_file_0_because_it_would_overwrite_input_file: { code: 5055, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", message: "Cannot write file '{0}' because it would overwrite input file." },
-        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: { code: 5056, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", message: "Cannot write file '{0}' because it would be overwritten by multiple input files." },
-        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'" },
-        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'" },
-        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: { code: 5059, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", message: "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier." },
-        Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
-        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
-        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
-        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
-        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
-        Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
-        Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
-        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: { code: 6003, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", message: "Specify the location where debugger should locate map files instead of generated locations." },
-        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: { code: 6004, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations_6004", message: "Specify the location where debugger should locate TypeScript files instead of source locations." },
-        Watch_input_files: { code: 6005, category: ts.DiagnosticCategory.Message, key: "Watch_input_files_6005", message: "Watch input files." },
-        Redirect_output_structure_to_the_directory: { code: 6006, category: ts.DiagnosticCategory.Message, key: "Redirect_output_structure_to_the_directory_6006", message: "Redirect output structure to the directory." },
-        Do_not_erase_const_enum_declarations_in_generated_code: { code: 6007, category: ts.DiagnosticCategory.Message, key: "Do_not_erase_const_enum_declarations_in_generated_code_6007", message: "Do not erase const enum declarations in generated code." },
-        Do_not_emit_outputs_if_any_errors_were_reported: { code: 6008, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_if_any_errors_were_reported_6008", message: "Do not emit outputs if any errors were reported." },
-        Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
-        Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
-        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
-        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
-        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
-        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
-        Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
-        Print_the_compiler_s_version: { code: 6019, category: ts.DiagnosticCategory.Message, key: "Print_the_compiler_s_version_6019", message: "Print the compiler's version." },
-        Compile_the_project_in_the_given_directory: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_in_the_given_directory_6020", message: "Compile the project in the given directory." },
-        Syntax_Colon_0: { code: 6023, category: ts.DiagnosticCategory.Message, key: "Syntax_Colon_0_6023", message: "Syntax: {0}" },
-        options: { code: 6024, category: ts.DiagnosticCategory.Message, key: "options_6024", message: "options" },
-        file: { code: 6025, category: ts.DiagnosticCategory.Message, key: "file_6025", message: "file" },
-        Examples_Colon_0: { code: 6026, category: ts.DiagnosticCategory.Message, key: "Examples_Colon_0_6026", message: "Examples: {0}" },
-        Options_Colon: { code: 6027, category: ts.DiagnosticCategory.Message, key: "Options_Colon_6027", message: "Options:" },
-        Version_0: { code: 6029, category: ts.DiagnosticCategory.Message, key: "Version_0_6029", message: "Version {0}" },
-        Insert_command_line_options_and_files_from_a_file: { code: 6030, category: ts.DiagnosticCategory.Message, key: "Insert_command_line_options_and_files_from_a_file_6030", message: "Insert command line options and files from a file." },
-        File_change_detected_Starting_incremental_compilation: { code: 6032, category: ts.DiagnosticCategory.Message, key: "File_change_detected_Starting_incremental_compilation_6032", message: "File change detected. Starting incremental compilation..." },
-        KIND: { code: 6034, category: ts.DiagnosticCategory.Message, key: "KIND_6034", message: "KIND" },
-        FILE: { code: 6035, category: ts.DiagnosticCategory.Message, key: "FILE_6035", message: "FILE" },
-        VERSION: { code: 6036, category: ts.DiagnosticCategory.Message, key: "VERSION_6036", message: "VERSION" },
-        LOCATION: { code: 6037, category: ts.DiagnosticCategory.Message, key: "LOCATION_6037", message: "LOCATION" },
-        DIRECTORY: { code: 6038, category: ts.DiagnosticCategory.Message, key: "DIRECTORY_6038", message: "DIRECTORY" },
-        Compilation_complete_Watching_for_file_changes: { code: 6042, category: ts.DiagnosticCategory.Message, key: "Compilation_complete_Watching_for_file_changes_6042", message: "Compilation complete. Watching for file changes." },
-        Generates_corresponding_map_file: { code: 6043, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_map_file_6043", message: "Generates corresponding '.map' file." },
-        Compiler_option_0_expects_an_argument: { code: 6044, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_expects_an_argument_6044", message: "Compiler option '{0}' expects an argument." },
-        Unterminated_quoted_string_in_response_file_0: { code: 6045, category: ts.DiagnosticCategory.Error, key: "Unterminated_quoted_string_in_response_file_0_6045", message: "Unterminated quoted string in response file '{0}'." },
-        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}" },
-        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: { code: 6048, category: ts.DiagnosticCategory.Error, key: "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", message: "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'." },
-        Unsupported_locale_0: { code: 6049, category: ts.DiagnosticCategory.Error, key: "Unsupported_locale_0_6049", message: "Unsupported locale '{0}'." },
-        Unable_to_open_file_0: { code: 6050, category: ts.DiagnosticCategory.Error, key: "Unable_to_open_file_0_6050", message: "Unable to open file '{0}'." },
-        Corrupted_locale_file_0: { code: 6051, category: ts.DiagnosticCategory.Error, key: "Corrupted_locale_file_0_6051", message: "Corrupted locale file {0}." },
-        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: { code: 6052, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_expressions_and_declarations_with_an_implied_any_type_6052", message: "Raise error on expressions and declarations with an implied 'any' type." },
-        File_0_not_found: { code: 6053, category: ts.DiagnosticCategory.Error, key: "File_0_not_found_6053", message: "File '{0}' not found." },
-        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: { code: 6054, category: ts.DiagnosticCategory.Error, key: "File_0_has_unsupported_extension_The_only_supported_extensions_are_1_6054", message: "File '{0}' has unsupported extension. The only supported extensions are {1}." },
-        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: { code: 6055, category: ts.DiagnosticCategory.Message, key: "Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures_6055", message: "Suppress noImplicitAny errors for indexing objects lacking index signatures." },
-        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: { code: 6056, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_declarations_for_code_that_has_an_internal_annotation_6056", message: "Do not emit declarations for code that has an '@internal' annotation." },
-        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: { code: 6058, category: ts.DiagnosticCategory.Message, key: "Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir_6058", message: "Specify the root directory of input files. Use to control the output directory structure with --outDir." },
-        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: { code: 6059, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files_6059", message: "File '{0}' is not under 'rootDir' '{1}'. 'rootDir' is expected to contain all source files." },
-        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: { code: 6060, category: ts.DiagnosticCategory.Message, key: "Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix_6060", message: "Specify the end of line sequence to be used when emitting files: 'CRLF' (dos) or 'LF' (unix)." },
-        NEWLINE: { code: 6061, category: ts.DiagnosticCategory.Message, key: "NEWLINE_6061", message: "NEWLINE" },
-        Option_0_can_only_be_specified_in_tsconfig_json_file: { code: 6064, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_specified_in_tsconfig_json_file_6064", message: "Option '{0}' can only be specified in 'tsconfig.json' file." },
-        Enables_experimental_support_for_ES7_decorators: { code: 6065, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_decorators_6065", message: "Enables experimental support for ES7 decorators." },
-        Enables_experimental_support_for_emitting_type_metadata_for_decorators: { code: 6066, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_emitting_type_metadata_for_decorators_6066", message: "Enables experimental support for emitting type metadata for decorators." },
-        Enables_experimental_support_for_ES7_async_functions: { code: 6068, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_async_functions_6068", message: "Enables experimental support for ES7 async functions." },
-        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: { code: 6069, category: ts.DiagnosticCategory.Message, key: "Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6_6069", message: "Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6)." },
-        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: { code: 6070, category: ts.DiagnosticCategory.Message, key: "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", message: "Initializes a TypeScript project and creates a tsconfig.json file." },
-        Successfully_created_a_tsconfig_json_file: { code: 6071, category: ts.DiagnosticCategory.Message, key: "Successfully_created_a_tsconfig_json_file_6071", message: "Successfully created a tsconfig.json file." },
-        Suppress_excess_property_checks_for_object_literals: { code: 6072, category: ts.DiagnosticCategory.Message, key: "Suppress_excess_property_checks_for_object_literals_6072", message: "Suppress excess property checks for object literals." },
-        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context. (experimental)" },
-        Do_not_report_errors_on_unused_labels: { code: 6074, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unused_labels_6074", message: "Do not report errors on unused labels." },
-        Report_error_when_not_all_code_paths_in_function_return_a_value: { code: 6075, category: ts.DiagnosticCategory.Message, key: "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", message: "Report error when not all code paths in function return a value." },
-        Report_errors_for_fallthrough_cases_in_switch_statement: { code: 6076, category: ts.DiagnosticCategory.Message, key: "Report_errors_for_fallthrough_cases_in_switch_statement_6076", message: "Report errors for fallthrough cases in switch statement." },
-        Do_not_report_errors_on_unreachable_code: { code: 6077, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unreachable_code_6077", message: "Do not report errors on unreachable code." },
-        Disallow_inconsistently_cased_references_to_the_same_file: { code: 6078, category: ts.DiagnosticCategory.Message, key: "Disallow_inconsistently_cased_references_to_the_same_file_6078", message: "Disallow inconsistently-cased references to the same file." },
-        Specify_library_files_to_be_included_in_the_compilation_Colon: { code: 6079, category: ts.DiagnosticCategory.Message, key: "Specify_library_files_to_be_included_in_the_compilation_Colon_6079", message: "Specify library files to be included in the compilation: " },
-        Specify_JSX_code_generation_Colon_preserve_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_or_react_6080", message: "Specify JSX code generation: 'preserve' or 'react'" },
-        Only_amd_and_system_modules_are_supported_alongside_0: { code: 6082, category: ts.DiagnosticCategory.Error, key: "Only_amd_and_system_modules_are_supported_alongside_0_6082", message: "Only 'amd' and 'system' modules are supported alongside --{0}." },
-        Base_directory_to_resolve_non_absolute_module_names: { code: 6083, category: ts.DiagnosticCategory.Message, key: "Base_directory_to_resolve_non_absolute_module_names_6083", message: "Base directory to resolve non-absolute module names." },
-        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084", message: "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit" },
-        Enable_tracing_of_the_name_resolution_process: { code: 6085, category: ts.DiagnosticCategory.Message, key: "Enable_tracing_of_the_name_resolution_process_6085", message: "Enable tracing of the name resolution process." },
-        Resolving_module_0_from_1: { code: 6086, category: ts.DiagnosticCategory.Message, key: "Resolving_module_0_from_1_6086", message: "======== Resolving module '{0}' from '{1}'. ========" },
-        Explicitly_specified_module_resolution_kind_Colon_0: { code: 6087, category: ts.DiagnosticCategory.Message, key: "Explicitly_specified_module_resolution_kind_Colon_0_6087", message: "Explicitly specified module resolution kind: '{0}'." },
-        Module_resolution_kind_is_not_specified_using_0: { code: 6088, category: ts.DiagnosticCategory.Message, key: "Module_resolution_kind_is_not_specified_using_0_6088", message: "Module resolution kind is not specified, using '{0}'." },
-        Module_name_0_was_successfully_resolved_to_1: { code: 6089, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_successfully_resolved_to_1_6089", message: "======== Module name '{0}' was successfully resolved to '{1}'. ========" },
-        Module_name_0_was_not_resolved: { code: 6090, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_not_resolved_6090", message: "======== Module name '{0}' was not resolved. ========" },
-        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: { code: 6091, category: ts.DiagnosticCategory.Message, key: "paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0_6091", message: "'paths' option is specified, looking for a pattern to match module name '{0}'." },
-        Module_name_0_matched_pattern_1: { code: 6092, category: ts.DiagnosticCategory.Message, key: "Module_name_0_matched_pattern_1_6092", message: "Module name '{0}', matched pattern '{1}'." },
-        Trying_substitution_0_candidate_module_location_Colon_1: { code: 6093, category: ts.DiagnosticCategory.Message, key: "Trying_substitution_0_candidate_module_location_Colon_1_6093", message: "Trying substitution '{0}', candidate module location: '{1}'." },
-        Resolving_module_name_0_relative_to_base_url_1_2: { code: 6094, category: ts.DiagnosticCategory.Message, key: "Resolving_module_name_0_relative_to_base_url_1_2_6094", message: "Resolving module name '{0}' relative to base url '{1}' - '{2}'." },
-        Loading_module_as_file_Slash_folder_candidate_module_location_0: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095", message: "Loading module as file / folder, candidate module location '{0}'." },
-        File_0_does_not_exist: { code: 6096, category: ts.DiagnosticCategory.Message, key: "File_0_does_not_exist_6096", message: "File '{0}' does not exist." },
-        File_0_exist_use_it_as_a_name_resolution_result: { code: 6097, category: ts.DiagnosticCategory.Message, key: "File_0_exist_use_it_as_a_name_resolution_result_6097", message: "File '{0}' exist - use it as a name resolution result." },
-        Loading_module_0_from_node_modules_folder: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_6098", message: "Loading module '{0}' from 'node_modules' folder." },
-        Found_package_json_at_0: { code: 6099, category: ts.DiagnosticCategory.Message, key: "Found_package_json_at_0_6099", message: "Found 'package.json' at '{0}'." },
-        package_json_does_not_have_types_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_types_field_6100", message: "'package.json' does not have 'types' field." },
-        package_json_has_0_field_1_that_references_2: { code: 6101, category: ts.DiagnosticCategory.Message, key: "package_json_has_0_field_1_that_references_2_6101", message: "'package.json' has '{0}' field '{1}' that references '{2}'." },
-        Allow_javascript_files_to_be_compiled: { code: 6102, category: ts.DiagnosticCategory.Message, key: "Allow_javascript_files_to_be_compiled_6102", message: "Allow javascript files to be compiled." },
-        Option_0_should_have_array_of_strings_as_a_value: { code: 6103, category: ts.DiagnosticCategory.Error, key: "Option_0_should_have_array_of_strings_as_a_value_6103", message: "Option '{0}' should have array of strings as a value." },
-        Checking_if_0_is_the_longest_matching_prefix_for_1_2: { code: 6104, category: ts.DiagnosticCategory.Message, key: "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", message: "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'." },
-        Expected_type_of_0_field_in_package_json_to_be_string_got_1: { code: 6105, category: ts.DiagnosticCategory.Message, key: "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", message: "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'." },
-        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'" },
-        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'" },
-        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'" },
-        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'" },
-        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'" },
-        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed" },
-        Do_not_emit_use_strict_directives_in_module_output: { code: 6112, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_use_strict_directives_in_module_output_6112", message: "Do not emit 'use strict' directives in module output." },
-        Enable_strict_null_checks: { code: 6113, category: ts.DiagnosticCategory.Message, key: "Enable_strict_null_checks_6113", message: "Enable strict null checks." },
-        Unknown_option_excludes_Did_you_mean_exclude: { code: 6114, category: ts.DiagnosticCategory.Error, key: "Unknown_option_excludes_Did_you_mean_exclude_6114", message: "Unknown option 'excludes'. Did you mean 'exclude'?" },
-        Raise_error_on_this_expressions_with_an_implied_any_type: { code: 6115, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_this_expressions_with_an_implied_any_type_6115", message: "Raise error on 'this' expressions with an implied 'any' type." },
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: { code: 6116, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_2_6116", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory '{2}'. ========" },
-        Resolving_using_primary_search_paths: { code: 6117, category: ts.DiagnosticCategory.Message, key: "Resolving_using_primary_search_paths_6117", message: "Resolving using primary search paths..." },
-        Resolving_from_node_modules_folder: { code: 6118, category: ts.DiagnosticCategory.Message, key: "Resolving_from_node_modules_folder_6118", message: "Resolving from node_modules folder..." },
-        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: { code: 6119, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", message: "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========" },
-        Type_reference_directive_0_was_not_resolved: { code: 6120, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_not_resolved_6120", message: "======== Type reference directive '{0}' was not resolved. ========" },
-        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'" },
-        Root_directory_cannot_be_determined_skipping_primary_search_paths: { code: 6122, category: ts.DiagnosticCategory.Message, key: "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", message: "Root directory cannot be determined, skipping primary search paths." },
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: { code: 6123, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========" },
-        Type_declaration_files_to_be_included_in_compilation: { code: 6124, category: ts.DiagnosticCategory.Message, key: "Type_declaration_files_to_be_included_in_compilation_6124", message: "Type declaration files to be included in compilation." },
-        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'" },
-        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: { code: 6126, category: ts.DiagnosticCategory.Message, key: "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", message: "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder." },
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: { code: 6127, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", message: "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========" },
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
-        The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
-        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
-        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
-        Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
-        Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
-        Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
-        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: { code: 7009, category: ts.DiagnosticCategory.Error, key: "new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type_7009", message: "'new' expression, whose target lacks a construct signature, implicitly has an 'any' type." },
-        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: { code: 7010, category: ts.DiagnosticCategory.Error, key: "_0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type_7010", message: "'{0}', which lacks return-type annotation, implicitly has an '{1}' return type." },
-        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: { code: 7011, category: ts.DiagnosticCategory.Error, key: "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", message: "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type." },
-        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7013, category: ts.DiagnosticCategory.Error, key: "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", message: "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type." },
-        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: { code: 7015, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", message: "Element implicitly has an 'any' type because index expression is not of type 'number'." },
-        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation: { code: 7016, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation_7016", message: "Property '{0}' implicitly has type 'any', because its 'set' accessor lacks a type annotation." },
-        Index_signature_of_object_type_implicitly_has_an_any_type: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Index_signature_of_object_type_implicitly_has_an_any_type_7017", message: "Index signature of object type implicitly has an 'any' type." },
-        Object_literal_s_property_0_implicitly_has_an_1_type: { code: 7018, category: ts.DiagnosticCategory.Error, key: "Object_literal_s_property_0_implicitly_has_an_1_type_7018", message: "Object literal's property '{0}' implicitly has an '{1}' type." },
-        Rest_parameter_0_implicitly_has_an_any_type: { code: 7019, category: ts.DiagnosticCategory.Error, key: "Rest_parameter_0_implicitly_has_an_any_type_7019", message: "Rest parameter '{0}' implicitly has an 'any[]' type." },
-        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7020, category: ts.DiagnosticCategory.Error, key: "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", message: "Call signature, which lacks return-type annotation, implicitly has an 'any' return type." },
-        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: { code: 7022, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or__7022", message: "'{0}' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer." },
-        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7023, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", message: "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
-        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7024, category: ts.DiagnosticCategory.Error, key: "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", message: "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
-        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: { code: 7025, category: ts.DiagnosticCategory.Error, key: "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", message: "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type." },
-        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists" },
-        Unreachable_code_detected: { code: 7027, category: ts.DiagnosticCategory.Error, key: "Unreachable_code_detected_7027", message: "Unreachable code detected." },
-        Unused_label: { code: 7028, category: ts.DiagnosticCategory.Error, key: "Unused_label_7028", message: "Unused label." },
-        Fallthrough_case_in_switch: { code: 7029, category: ts.DiagnosticCategory.Error, key: "Fallthrough_case_in_switch_7029", message: "Fallthrough case in switch." },
-        Not_all_code_paths_return_a_value: { code: 7030, category: ts.DiagnosticCategory.Error, key: "Not_all_code_paths_return_a_value_7030", message: "Not all code paths return a value." },
-        Binding_element_0_implicitly_has_an_1_type: { code: 7031, category: ts.DiagnosticCategory.Error, key: "Binding_element_0_implicitly_has_an_1_type_7031", message: "Binding element '{0}' implicitly has an '{1}' type." },
-        You_cannot_rename_this_element: { code: 8000, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_this_element_8000", message: "You cannot rename this element." },
-        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: { code: 8001, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", message: "You cannot rename elements that are defined in the standard TypeScript library." },
-        import_can_only_be_used_in_a_ts_file: { code: 8002, category: ts.DiagnosticCategory.Error, key: "import_can_only_be_used_in_a_ts_file_8002", message: "'import ... =' can only be used in a .ts file." },
-        export_can_only_be_used_in_a_ts_file: { code: 8003, category: ts.DiagnosticCategory.Error, key: "export_can_only_be_used_in_a_ts_file_8003", message: "'export=' can only be used in a .ts file." },
-        type_parameter_declarations_can_only_be_used_in_a_ts_file: { code: 8004, category: ts.DiagnosticCategory.Error, key: "type_parameter_declarations_can_only_be_used_in_a_ts_file_8004", message: "'type parameter declarations' can only be used in a .ts file." },
-        implements_clauses_can_only_be_used_in_a_ts_file: { code: 8005, category: ts.DiagnosticCategory.Error, key: "implements_clauses_can_only_be_used_in_a_ts_file_8005", message: "'implements clauses' can only be used in a .ts file." },
-        interface_declarations_can_only_be_used_in_a_ts_file: { code: 8006, category: ts.DiagnosticCategory.Error, key: "interface_declarations_can_only_be_used_in_a_ts_file_8006", message: "'interface declarations' can only be used in a .ts file." },
-        module_declarations_can_only_be_used_in_a_ts_file: { code: 8007, category: ts.DiagnosticCategory.Error, key: "module_declarations_can_only_be_used_in_a_ts_file_8007", message: "'module declarations' can only be used in a .ts file." },
-        type_aliases_can_only_be_used_in_a_ts_file: { code: 8008, category: ts.DiagnosticCategory.Error, key: "type_aliases_can_only_be_used_in_a_ts_file_8008", message: "'type aliases' can only be used in a .ts file." },
-        _0_can_only_be_used_in_a_ts_file: { code: 8009, category: ts.DiagnosticCategory.Error, key: "_0_can_only_be_used_in_a_ts_file_8009", message: "'{0}' can only be used in a .ts file." },
-        types_can_only_be_used_in_a_ts_file: { code: 8010, category: ts.DiagnosticCategory.Error, key: "types_can_only_be_used_in_a_ts_file_8010", message: "'types' can only be used in a .ts file." },
-        type_arguments_can_only_be_used_in_a_ts_file: { code: 8011, category: ts.DiagnosticCategory.Error, key: "type_arguments_can_only_be_used_in_a_ts_file_8011", message: "'type arguments' can only be used in a .ts file." },
-        parameter_modifiers_can_only_be_used_in_a_ts_file: { code: 8012, category: ts.DiagnosticCategory.Error, key: "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", message: "'parameter modifiers' can only be used in a .ts file." },
-        property_declarations_can_only_be_used_in_a_ts_file: { code: 8014, category: ts.DiagnosticCategory.Error, key: "property_declarations_can_only_be_used_in_a_ts_file_8014", message: "'property declarations' can only be used in a .ts file." },
-        enum_declarations_can_only_be_used_in_a_ts_file: { code: 8015, category: ts.DiagnosticCategory.Error, key: "enum_declarations_can_only_be_used_in_a_ts_file_8015", message: "'enum declarations' can only be used in a .ts file." },
-        type_assertion_expressions_can_only_be_used_in_a_ts_file: { code: 8016, category: ts.DiagnosticCategory.Error, key: "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", message: "'type assertion expressions' can only be used in a .ts file." },
-        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses." },
-        class_expressions_are_not_currently_supported: { code: 9003, category: ts.DiagnosticCategory.Error, key: "class_expressions_are_not_currently_supported_9003", message: "'class' expressions are not currently supported." },
-        JSX_attributes_must_only_be_assigned_a_non_empty_expression: { code: 17000, category: ts.DiagnosticCategory.Error, key: "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", message: "JSX attributes must only be assigned a non-empty 'expression'." },
-        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: { code: 17001, category: ts.DiagnosticCategory.Error, key: "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", message: "JSX elements cannot have multiple attributes with the same name." },
-        Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: ts.DiagnosticCategory.Error, key: "Expected_corresponding_JSX_closing_tag_for_0_17002", message: "Expected corresponding JSX closing tag for '{0}'." },
-        JSX_attribute_expected: { code: 17003, category: ts.DiagnosticCategory.Error, key: "JSX_attribute_expected_17003", message: "JSX attribute expected." },
-        Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: ts.DiagnosticCategory.Error, key: "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", message: "Cannot use JSX unless the '--jsx' flag is provided." },
-        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'" },
-        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17006, category: ts.DiagnosticCategory.Error, key: "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", message: "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
-        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17007, category: ts.DiagnosticCategory.Error, key: "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", message: "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
-        JSX_element_0_has_no_corresponding_closing_tag: { code: 17008, category: ts.DiagnosticCategory.Error, key: "JSX_element_0_has_no_corresponding_closing_tag_17008", message: "JSX element '{0}' has no corresponding closing tag." },
-        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: { code: 17009, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", message: "'super' must be called before accessing 'this' in the constructor of a derived class." },
-        Unknown_typing_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_typing_option_0_17010", message: "Unknown typing option '{0}'." }
-    };
-})(ts || (ts = {}));
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11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    function lookupInUnicodeMap(code, map) {
-        if (code < map[0]) {
-            return false;
-        }
-        var lo = 0;
-        var hi = map.length;
-        var mid;
-        while (lo + 1 < hi) {
-            mid = lo + (hi - lo) / 2;
-            mid -= mid % 2;
-            if (map[mid] <= code && code <= map[mid + 1]) {
-                return true;
-            }
-            if (code < map[mid]) {
-                hi = mid;
-            }
-            else {
-                lo = mid + 2;
-            }
-        }
-        return false;
-    }
-    function isUnicodeIdentifierStart(code, languageVersion) {
-        return languageVersion >= 1 ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
-    }
-    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
-    function isUnicodeIdentifierPart(code, languageVersion) {
-        return languageVersion >= 1 ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
-    }
-    function makeReverseMap(source) {
-        var result = [];
-        for (var name_4 in source) {
-            if (source.hasOwnProperty(name_4)) {
-                result[source[name_4]] = name_4;
-            }
-        }
-        return result;
-    }
-    var tokenStrings = makeReverseMap(textToToken);
-    function tokenToString(t) {
-        return tokenStrings[t];
-    }
-    ts.tokenToString = tokenToString;
-    function stringToToken(s) {
-        return textToToken[s];
-    }
-    ts.stringToToken = stringToToken;
-    function computeLineStarts(text) {
-        var result = new Array();
-        var pos = 0;
-        var lineStart = 0;
-        while (pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 13:
-                    if (text.charCodeAt(pos) === 10) {
-                        pos++;
-                    }
-                case 10:
-                    result.push(lineStart);
-                    lineStart = pos;
-                    break;
-                default:
-                    if (ch > 127 && isLineBreak(ch)) {
-                        result.push(lineStart);
-                        lineStart = pos;
-                    }
-                    break;
-            }
-        }
-        result.push(lineStart);
-        return result;
-    }
-    ts.computeLineStarts = computeLineStarts;
-    function getPositionOfLineAndCharacter(sourceFile, line, character) {
-        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
-    }
-    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
-    function computePositionOfLineAndCharacter(lineStarts, line, character) {
-        ts.Debug.assert(line >= 0 && line < lineStarts.length);
-        return lineStarts[line] + character;
-    }
-    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
-    function getLineStarts(sourceFile) {
-        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
-    }
-    ts.getLineStarts = getLineStarts;
-    function computeLineAndCharacterOfPosition(lineStarts, position) {
-        var lineNumber = ts.binarySearch(lineStarts, position);
-        if (lineNumber < 0) {
-            lineNumber = ~lineNumber - 1;
-            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
-        }
-        return {
-            line: lineNumber,
-            character: position - lineStarts[lineNumber]
-        };
-    }
-    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
-    function getLineAndCharacterOfPosition(sourceFile, position) {
-        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
-    }
-    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-    function isWhiteSpace(ch) {
-        return ch === 32 ||
-            ch === 9 ||
-            ch === 11 ||
-            ch === 12 ||
-            ch === 160 ||
-            ch === 133 ||
-            ch === 5760 ||
-            ch >= 8192 && ch <= 8203 ||
-            ch === 8239 ||
-            ch === 8287 ||
-            ch === 12288 ||
-            ch === 65279;
-    }
-    ts.isWhiteSpace = isWhiteSpace;
-    function isLineBreak(ch) {
-        return ch === 10 ||
-            ch === 13 ||
-            ch === 8232 ||
-            ch === 8233;
-    }
-    ts.isLineBreak = isLineBreak;
-    function isDigit(ch) {
-        return ch >= 48 && ch <= 57;
-    }
-    function isOctalDigit(ch) {
-        return ch >= 48 && ch <= 55;
-    }
-    ts.isOctalDigit = isOctalDigit;
-    function couldStartTrivia(text, pos) {
-        var ch = text.charCodeAt(pos);
-        switch (ch) {
-            case 13:
-            case 10:
-            case 9:
-            case 11:
-            case 12:
-            case 32:
-            case 47:
-            case 60:
-            case 61:
-            case 62:
-                return true;
-            case 35:
-                return pos === 0;
-            default:
-                return ch > 127;
-        }
-    }
-    ts.couldStartTrivia = couldStartTrivia;
-    function skipTrivia(text, pos, stopAfterLineBreak) {
-        if (!(pos >= 0)) {
-            return pos;
-        }
-        while (true) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13:
-                    if (text.charCodeAt(pos + 1) === 10) {
-                        pos++;
-                    }
-                case 10:
-                    pos++;
-                    if (stopAfterLineBreak) {
-                        return pos;
-                    }
-                    continue;
-                case 9:
-                case 11:
-                case 12:
-                case 32:
-                    pos++;
-                    continue;
-                case 47:
-                    if (text.charCodeAt(pos + 1) === 47) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (isLineBreak(text.charCodeAt(pos))) {
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    if (text.charCodeAt(pos + 1) === 42) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
-                                pos += 2;
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    break;
-                case 60:
-                case 61:
-                case 62:
-                    if (isConflictMarkerTrivia(text, pos)) {
-                        pos = scanConflictMarkerTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                case 35:
-                    if (pos === 0 && isShebangTrivia(text, pos)) {
-                        pos = scanShebangTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                default:
-                    if (ch > 127 && (isWhiteSpace(ch) || isLineBreak(ch))) {
-                        pos++;
-                        continue;
-                    }
-                    break;
-            }
-            return pos;
-        }
-    }
-    ts.skipTrivia = skipTrivia;
-    var mergeConflictMarkerLength = "<<<<<<<".length;
-    function isConflictMarkerTrivia(text, pos) {
-        ts.Debug.assert(pos >= 0);
-        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
-            var ch = text.charCodeAt(pos);
-            if ((pos + mergeConflictMarkerLength) < text.length) {
-                for (var i = 0, n = mergeConflictMarkerLength; i < n; i++) {
-                    if (text.charCodeAt(pos + i) !== ch) {
-                        return false;
-                    }
-                }
-                return ch === 61 ||
-                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32;
-            }
-        }
-        return false;
-    }
-    function scanConflictMarkerTrivia(text, pos, error) {
-        if (error) {
-            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
-        }
-        var ch = text.charCodeAt(pos);
-        var len = text.length;
-        if (ch === 60 || ch === 62) {
-            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
-                pos++;
-            }
-        }
-        else {
-            ts.Debug.assert(ch === 61);
-            while (pos < len) {
-                var ch_1 = text.charCodeAt(pos);
-                if (ch_1 === 62 && isConflictMarkerTrivia(text, pos)) {
-                    break;
-                }
-                pos++;
-            }
-        }
-        return pos;
-    }
-    var shebangTriviaRegex = /^#!.*/;
-    function isShebangTrivia(text, pos) {
-        ts.Debug.assert(pos === 0);
-        return shebangTriviaRegex.test(text);
-    }
-    function scanShebangTrivia(text, pos) {
-        var shebang = shebangTriviaRegex.exec(text)[0];
-        pos = pos + shebang.length;
-        return pos;
-    }
-    function getCommentRanges(text, pos, trailing) {
-        var result;
-        var collecting = trailing || pos === 0;
-        while (pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13:
-                    if (text.charCodeAt(pos + 1) === 10) {
-                        pos++;
-                    }
-                case 10:
-                    pos++;
-                    if (trailing) {
-                        return result;
-                    }
-                    collecting = true;
-                    if (result && result.length) {
-                        ts.lastOrUndefined(result).hasTrailingNewLine = true;
-                    }
-                    continue;
-                case 9:
-                case 11:
-                case 12:
-                case 32:
-                    pos++;
-                    continue;
-                case 47:
-                    var nextChar = text.charCodeAt(pos + 1);
-                    var hasTrailingNewLine = false;
-                    if (nextChar === 47 || nextChar === 42) {
-                        var kind = nextChar === 47 ? 2 : 3;
-                        var startPos = pos;
-                        pos += 2;
-                        if (nextChar === 47) {
-                            while (pos < text.length) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    hasTrailingNewLine = true;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        else {
-                            while (pos < text.length) {
-                                if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
-                                    pos += 2;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        if (collecting) {
-                            if (!result) {
-                                result = [];
-                            }
-                            result.push({ pos: startPos, end: pos, hasTrailingNewLine: hasTrailingNewLine, kind: kind });
-                        }
-                        continue;
-                    }
-                    break;
-                default:
-                    if (ch > 127 && (isWhiteSpace(ch) || isLineBreak(ch))) {
-                        if (result && result.length && isLineBreak(ch)) {
-                            ts.lastOrUndefined(result).hasTrailingNewLine = true;
-                        }
-                        pos++;
-                        continue;
-                    }
-                    break;
-            }
-            return result;
-        }
-        return result;
-    }
-    function getLeadingCommentRanges(text, pos) {
-        return getCommentRanges(text, pos, false);
-    }
-    ts.getLeadingCommentRanges = getLeadingCommentRanges;
-    function getTrailingCommentRanges(text, pos) {
-        return getCommentRanges(text, pos, true);
-    }
-    ts.getTrailingCommentRanges = getTrailingCommentRanges;
-    function getShebang(text) {
-        return shebangTriviaRegex.test(text)
-            ? shebangTriviaRegex.exec(text)[0]
-            : undefined;
-    }
-    ts.getShebang = getShebang;
-    function isIdentifierStart(ch, languageVersion) {
-        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
-            ch === 36 || ch === 95 ||
-            ch > 127 && isUnicodeIdentifierStart(ch, languageVersion);
-    }
-    ts.isIdentifierStart = isIdentifierStart;
-    function isIdentifierPart(ch, languageVersion) {
-        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
-            ch >= 48 && ch <= 57 || ch === 36 || ch === 95 ||
-            ch > 127 && isUnicodeIdentifierPart(ch, languageVersion);
-    }
-    ts.isIdentifierPart = isIdentifierPart;
-    function isIdentifier(name, languageVersion) {
-        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
-            return false;
-        }
-        for (var i = 1, n = name.length; i < n; i++) {
-            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.isIdentifier = isIdentifier;
-    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
-        if (languageVariant === void 0) { languageVariant = 0; }
-        var pos;
-        var end;
-        var startPos;
-        var tokenPos;
-        var token;
-        var tokenValue;
-        var precedingLineBreak;
-        var hasExtendedUnicodeEscape;
-        var tokenIsUnterminated;
-        setText(text, start, length);
-        return {
-            getStartPos: function () { return startPos; },
-            getTextPos: function () { return pos; },
-            getToken: function () { return token; },
-            getTokenPos: function () { return tokenPos; },
-            getTokenText: function () { return text.substring(tokenPos, pos); },
-            getTokenValue: function () { return tokenValue; },
-            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
-            hasPrecedingLineBreak: function () { return precedingLineBreak; },
-            isIdentifier: function () { return token === 69 || token > 105; },
-            isReservedWord: function () { return token >= 70 && token <= 105; },
-            isUnterminated: function () { return tokenIsUnterminated; },
-            reScanGreaterToken: reScanGreaterToken,
-            reScanSlashToken: reScanSlashToken,
-            reScanTemplateToken: reScanTemplateToken,
-            scanJsxIdentifier: scanJsxIdentifier,
-            reScanJsxToken: reScanJsxToken,
-            scanJsxToken: scanJsxToken,
-            scanJSDocToken: scanJSDocToken,
-            scan: scan,
-            setText: setText,
-            setScriptTarget: setScriptTarget,
-            setLanguageVariant: setLanguageVariant,
-            setOnError: setOnError,
-            setTextPos: setTextPos,
-            tryScan: tryScan,
-            lookAhead: lookAhead,
-            scanRange: scanRange
-        };
-        function error(message, length) {
-            if (onError) {
-                onError(message, length || 0);
-            }
-        }
-        function scanNumber() {
-            var start = pos;
-            while (isDigit(text.charCodeAt(pos)))
-                pos++;
-            if (text.charCodeAt(pos) === 46) {
-                pos++;
-                while (isDigit(text.charCodeAt(pos)))
-                    pos++;
-            }
-            var end = pos;
-            if (text.charCodeAt(pos) === 69 || text.charCodeAt(pos) === 101) {
-                pos++;
-                if (text.charCodeAt(pos) === 43 || text.charCodeAt(pos) === 45)
-                    pos++;
-                if (isDigit(text.charCodeAt(pos))) {
-                    pos++;
-                    while (isDigit(text.charCodeAt(pos)))
-                        pos++;
-                    end = pos;
-                }
-                else {
-                    error(ts.Diagnostics.Digit_expected);
-                }
-            }
-            return "" + +(text.substring(start, end));
-        }
-        function scanOctalDigits() {
-            var start = pos;
-            while (isOctalDigit(text.charCodeAt(pos))) {
-                pos++;
-            }
-            return +(text.substring(start, pos));
-        }
-        function scanExactNumberOfHexDigits(count) {
-            return scanHexDigits(count, false);
-        }
-        function scanMinimumNumberOfHexDigits(count) {
-            return scanHexDigits(count, true);
-        }
-        function scanHexDigits(minCount, scanAsManyAsPossible) {
-            var digits = 0;
-            var value = 0;
-            while (digits < minCount || scanAsManyAsPossible) {
-                var ch = text.charCodeAt(pos);
-                if (ch >= 48 && ch <= 57) {
-                    value = value * 16 + ch - 48;
-                }
-                else if (ch >= 65 && ch <= 70) {
-                    value = value * 16 + ch - 65 + 10;
-                }
-                else if (ch >= 97 && ch <= 102) {
-                    value = value * 16 + ch - 97 + 10;
-                }
-                else {
-                    break;
-                }
-                pos++;
-                digits++;
-            }
-            if (digits < minCount) {
-                value = -1;
-            }
-            return value;
-        }
-        function scanString() {
-            var quote = text.charCodeAt(pos);
-            pos++;
-            var result = "";
-            var start = pos;
-            while (true) {
-                if (pos >= end) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
-                }
-                var ch = text.charCodeAt(pos);
-                if (ch === quote) {
-                    result += text.substring(start, pos);
-                    pos++;
-                    break;
-                }
-                if (ch === 92) {
-                    result += text.substring(start, pos);
-                    result += scanEscapeSequence();
-                    start = pos;
-                    continue;
-                }
-                if (isLineBreak(ch)) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
-                }
-                pos++;
-            }
-            return result;
-        }
-        function scanTemplateAndSetTokenValue() {
-            var startedWithBacktick = text.charCodeAt(pos) === 96;
-            pos++;
-            var start = pos;
-            var contents = "";
-            var resultingToken;
-            while (true) {
-                if (pos >= end) {
-                    contents += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_template_literal);
-                    resultingToken = startedWithBacktick ? 11 : 14;
-                    break;
-                }
-                var currChar = text.charCodeAt(pos);
-                if (currChar === 96) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    resultingToken = startedWithBacktick ? 11 : 14;
-                    break;
-                }
-                if (currChar === 36 && pos + 1 < end && text.charCodeAt(pos + 1) === 123) {
-                    contents += text.substring(start, pos);
-                    pos += 2;
-                    resultingToken = startedWithBacktick ? 12 : 13;
-                    break;
-                }
-                if (currChar === 92) {
-                    contents += text.substring(start, pos);
-                    contents += scanEscapeSequence();
-                    start = pos;
-                    continue;
-                }
-                if (currChar === 13) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    if (pos < end && text.charCodeAt(pos) === 10) {
-                        pos++;
-                    }
-                    contents += "\n";
-                    start = pos;
-                    continue;
-                }
-                pos++;
-            }
-            ts.Debug.assert(resultingToken !== undefined);
-            tokenValue = contents;
-            return resultingToken;
-        }
-        function scanEscapeSequence() {
-            pos++;
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                return "";
-            }
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 48:
-                    return "\0";
-                case 98:
-                    return "\b";
-                case 116:
-                    return "\t";
-                case 110:
-                    return "\n";
-                case 118:
-                    return "\v";
-                case 102:
-                    return "\f";
-                case 114:
-                    return "\r";
-                case 39:
-                    return "\'";
-                case 34:
-                    return "\"";
-                case 117:
-                    if (pos < end && text.charCodeAt(pos) === 123) {
-                        hasExtendedUnicodeEscape = true;
-                        pos++;
-                        return scanExtendedUnicodeEscape();
-                    }
-                    return scanHexadecimalEscape(4);
-                case 120:
-                    return scanHexadecimalEscape(2);
-                case 13:
-                    if (pos < end && text.charCodeAt(pos) === 10) {
-                        pos++;
-                    }
-                case 10:
-                case 8232:
-                case 8233:
-                    return "";
-                default:
-                    return String.fromCharCode(ch);
-            }
-        }
-        function scanHexadecimalEscape(numDigits) {
-            var escapedValue = scanExactNumberOfHexDigits(numDigits);
-            if (escapedValue >= 0) {
-                return String.fromCharCode(escapedValue);
-            }
-            else {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                return "";
-            }
-        }
-        function scanExtendedUnicodeEscape() {
-            var escapedValue = scanMinimumNumberOfHexDigits(1);
-            var isInvalidExtendedEscape = false;
-            if (escapedValue < 0) {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                isInvalidExtendedEscape = true;
-            }
-            else if (escapedValue > 0x10FFFF) {
-                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
-                isInvalidExtendedEscape = true;
-            }
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                isInvalidExtendedEscape = true;
-            }
-            else if (text.charCodeAt(pos) === 125) {
-                pos++;
-            }
-            else {
-                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
-                isInvalidExtendedEscape = true;
-            }
-            if (isInvalidExtendedEscape) {
-                return "";
-            }
-            return utf16EncodeAsString(escapedValue);
-        }
-        function utf16EncodeAsString(codePoint) {
-            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
-            if (codePoint <= 65535) {
-                return String.fromCharCode(codePoint);
-            }
-            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
-            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
-            return String.fromCharCode(codeUnit1, codeUnit2);
-        }
-        function peekUnicodeEscape() {
-            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117) {
-                var start_1 = pos;
-                pos += 2;
-                var value = scanExactNumberOfHexDigits(4);
-                pos = start_1;
-                return value;
-            }
-            return -1;
-        }
-        function scanIdentifierParts() {
-            var result = "";
-            var start = pos;
-            while (pos < end) {
-                var ch = text.charCodeAt(pos);
-                if (isIdentifierPart(ch, languageVersion)) {
-                    pos++;
-                }
-                else if (ch === 92) {
-                    ch = peekUnicodeEscape();
-                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
-                        break;
-                    }
-                    result += text.substring(start, pos);
-                    result += String.fromCharCode(ch);
-                    pos += 6;
-                    start = pos;
-                }
-                else {
-                    break;
-                }
-            }
-            result += text.substring(start, pos);
-            return result;
-        }
-        function getIdentifierToken() {
-            var len = tokenValue.length;
-            if (len >= 2 && len <= 11) {
-                var ch = tokenValue.charCodeAt(0);
-                if (ch >= 97 && ch <= 122 && hasOwnProperty.call(textToToken, tokenValue)) {
-                    return token = textToToken[tokenValue];
-                }
-            }
-            return token = 69;
-        }
-        function scanBinaryOrOctalDigits(base) {
-            ts.Debug.assert(base !== 2 || base !== 8, "Expected either base 2 or base 8");
-            var value = 0;
-            var numberOfDigits = 0;
-            while (true) {
-                var ch = text.charCodeAt(pos);
-                var valueOfCh = ch - 48;
-                if (!isDigit(ch) || valueOfCh >= base) {
-                    break;
-                }
-                value = value * base + valueOfCh;
-                pos++;
-                numberOfDigits++;
-            }
-            if (numberOfDigits === 0) {
-                return -1;
-            }
-            return value;
-        }
-        function scan() {
-            startPos = pos;
-            hasExtendedUnicodeEscape = false;
-            precedingLineBreak = false;
-            tokenIsUnterminated = false;
-            while (true) {
-                tokenPos = pos;
-                if (pos >= end) {
-                    return token = 1;
-                }
-                var ch = text.charCodeAt(pos);
-                if (ch === 35 && pos === 0 && isShebangTrivia(text, pos)) {
-                    pos = scanShebangTrivia(text, pos);
-                    if (skipTrivia) {
-                        continue;
-                    }
-                    else {
-                        return token = 6;
-                    }
-                }
-                switch (ch) {
-                    case 10:
-                    case 13:
-                        precedingLineBreak = true;
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            if (ch === 13 && pos + 1 < end && text.charCodeAt(pos + 1) === 10) {
-                                pos += 2;
-                            }
-                            else {
-                                pos++;
-                            }
-                            return token = 4;
-                        }
-                    case 9:
-                    case 11:
-                    case 12:
-                    case 32:
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            while (pos < end && isWhiteSpace(text.charCodeAt(pos))) {
-                                pos++;
-                            }
-                            return token = 5;
-                        }
-                    case 33:
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            if (text.charCodeAt(pos + 2) === 61) {
-                                return pos += 3, token = 33;
-                            }
-                            return pos += 2, token = 31;
-                        }
-                        pos++;
-                        return token = 49;
-                    case 34:
-                    case 39:
-                        tokenValue = scanString();
-                        return token = 9;
-                    case 96:
-                        return token = scanTemplateAndSetTokenValue();
-                    case 37:
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 62;
-                        }
-                        pos++;
-                        return token = 40;
-                    case 38:
-                        if (text.charCodeAt(pos + 1) === 38) {
-                            return pos += 2, token = 51;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 66;
-                        }
-                        pos++;
-                        return token = 46;
-                    case 40:
-                        pos++;
-                        return token = 17;
-                    case 41:
-                        pos++;
-                        return token = 18;
-                    case 42:
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 59;
-                        }
-                        if (text.charCodeAt(pos + 1) === 42) {
-                            if (text.charCodeAt(pos + 2) === 61) {
-                                return pos += 3, token = 60;
-                            }
-                            return pos += 2, token = 38;
-                        }
-                        pos++;
-                        return token = 37;
-                    case 43:
-                        if (text.charCodeAt(pos + 1) === 43) {
-                            return pos += 2, token = 41;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 57;
-                        }
-                        pos++;
-                        return token = 35;
-                    case 44:
-                        pos++;
-                        return token = 24;
-                    case 45:
-                        if (text.charCodeAt(pos + 1) === 45) {
-                            return pos += 2, token = 42;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 58;
-                        }
-                        pos++;
-                        return token = 36;
-                    case 46:
-                        if (isDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = scanNumber();
-                            return token = 8;
-                        }
-                        if (text.charCodeAt(pos + 1) === 46 && text.charCodeAt(pos + 2) === 46) {
-                            return pos += 3, token = 22;
-                        }
-                        pos++;
-                        return token = 21;
-                    case 47:
-                        if (text.charCodeAt(pos + 1) === 47) {
-                            pos += 2;
-                            while (pos < end) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    break;
-                                }
-                                pos++;
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 2;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 42) {
-                            pos += 2;
-                            var commentClosed = false;
-                            while (pos < end) {
-                                var ch_2 = text.charCodeAt(pos);
-                                if (ch_2 === 42 && text.charCodeAt(pos + 1) === 47) {
-                                    pos += 2;
-                                    commentClosed = true;
-                                    break;
-                                }
-                                if (isLineBreak(ch_2)) {
-                                    precedingLineBreak = true;
-                                }
-                                pos++;
-                            }
-                            if (!commentClosed) {
-                                error(ts.Diagnostics.Asterisk_Slash_expected);
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                tokenIsUnterminated = !commentClosed;
-                                return token = 3;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 61;
-                        }
-                        pos++;
-                        return token = 39;
-                    case 48:
-                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 || text.charCodeAt(pos + 1) === 120)) {
-                            pos += 2;
-                            var value = scanMinimumNumberOfHexDigits(1);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 || text.charCodeAt(pos + 1) === 98)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(2);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Binary_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 || text.charCodeAt(pos + 1) === 111)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(8);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Octal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8;
-                        }
-                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = "" + scanOctalDigits();
-                            return token = 8;
-                        }
-                    case 49:
-                    case 50:
-                    case 51:
-                    case 52:
-                    case 53:
-                    case 54:
-                    case 55:
-                    case 56:
-                    case 57:
-                        tokenValue = scanNumber();
-                        return token = 8;
-                    case 58:
-                        pos++;
-                        return token = 54;
-                    case 59:
-                        pos++;
-                        return token = 23;
-                    case 60:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 60) {
-                            if (text.charCodeAt(pos + 2) === 61) {
-                                return pos += 3, token = 63;
-                            }
-                            return pos += 2, token = 43;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 28;
-                        }
-                        if (languageVariant === 1 &&
-                            text.charCodeAt(pos + 1) === 47 &&
-                            text.charCodeAt(pos + 2) !== 42) {
-                            return pos += 2, token = 26;
-                        }
-                        pos++;
-                        return token = 25;
-                    case 61:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            if (text.charCodeAt(pos + 2) === 61) {
-                                return pos += 3, token = 32;
-                            }
-                            return pos += 2, token = 30;
-                        }
-                        if (text.charCodeAt(pos + 1) === 62) {
-                            return pos += 2, token = 34;
-                        }
-                        pos++;
-                        return token = 56;
-                    case 62:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7;
-                            }
-                        }
-                        pos++;
-                        return token = 27;
-                    case 63:
-                        pos++;
-                        return token = 53;
-                    case 91:
-                        pos++;
-                        return token = 19;
-                    case 93:
-                        pos++;
-                        return token = 20;
-                    case 94:
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 68;
-                        }
-                        pos++;
-                        return token = 48;
-                    case 123:
-                        pos++;
-                        return token = 15;
-                    case 124:
-                        if (text.charCodeAt(pos + 1) === 124) {
-                            return pos += 2, token = 52;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61) {
-                            return pos += 2, token = 67;
-                        }
-                        pos++;
-                        return token = 47;
-                    case 125:
-                        pos++;
-                        return token = 16;
-                    case 126:
-                        pos++;
-                        return token = 50;
-                    case 64:
-                        pos++;
-                        return token = 55;
-                    case 92:
-                        var cookedChar = peekUnicodeEscape();
-                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
-                            pos += 6;
-                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
-                            return token = getIdentifierToken();
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0;
-                    default:
-                        if (isIdentifierStart(ch, languageVersion)) {
-                            pos++;
-                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
-                                pos++;
-                            tokenValue = text.substring(tokenPos, pos);
-                            if (ch === 92) {
-                                tokenValue += scanIdentifierParts();
-                            }
-                            return token = getIdentifierToken();
-                        }
-                        else if (isWhiteSpace(ch)) {
-                            pos++;
-                            continue;
-                        }
-                        else if (isLineBreak(ch)) {
-                            precedingLineBreak = true;
-                            pos++;
-                            continue;
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0;
-                }
-            }
-        }
-        function reScanGreaterToken() {
-            if (token === 27) {
-                if (text.charCodeAt(pos) === 62) {
-                    if (text.charCodeAt(pos + 1) === 62) {
-                        if (text.charCodeAt(pos + 2) === 61) {
-                            return pos += 3, token = 65;
-                        }
-                        return pos += 2, token = 45;
-                    }
-                    if (text.charCodeAt(pos + 1) === 61) {
-                        return pos += 2, token = 64;
-                    }
-                    pos++;
-                    return token = 44;
-                }
-                if (text.charCodeAt(pos) === 61) {
-                    pos++;
-                    return token = 29;
-                }
-            }
-            return token;
-        }
-        function reScanSlashToken() {
-            if (token === 39 || token === 61) {
-                var p = tokenPos + 1;
-                var inEscape = false;
-                var inCharacterClass = false;
-                while (true) {
-                    if (p >= end) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    var ch = text.charCodeAt(p);
-                    if (isLineBreak(ch)) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    if (inEscape) {
-                        inEscape = false;
-                    }
-                    else if (ch === 47 && !inCharacterClass) {
-                        p++;
-                        break;
-                    }
-                    else if (ch === 91) {
-                        inCharacterClass = true;
-                    }
-                    else if (ch === 92) {
-                        inEscape = true;
-                    }
-                    else if (ch === 93) {
-                        inCharacterClass = false;
-                    }
-                    p++;
-                }
-                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
-                    p++;
-                }
-                pos = p;
-                tokenValue = text.substring(tokenPos, pos);
-                token = 10;
-            }
-            return token;
-        }
-        function reScanTemplateToken() {
-            ts.Debug.assert(token === 16, "'reScanTemplateToken' should only be called on a '}'");
-            pos = tokenPos;
-            return token = scanTemplateAndSetTokenValue();
-        }
-        function reScanJsxToken() {
-            pos = tokenPos = startPos;
-            return token = scanJsxToken();
-        }
-        function scanJsxToken() {
-            startPos = tokenPos = pos;
-            if (pos >= end) {
-                return token = 1;
-            }
-            var char = text.charCodeAt(pos);
-            if (char === 60) {
-                if (text.charCodeAt(pos + 1) === 47) {
-                    pos += 2;
-                    return token = 26;
-                }
-                pos++;
-                return token = 25;
-            }
-            if (char === 123) {
-                pos++;
-                return token = 15;
-            }
-            while (pos < end) {
-                pos++;
-                char = text.charCodeAt(pos);
-                if ((char === 123) || (char === 60)) {
-                    break;
-                }
-            }
-            return token = 244;
-        }
-        function scanJsxIdentifier() {
-            if (tokenIsIdentifierOrKeyword(token)) {
-                var firstCharPosition = pos;
-                while (pos < end) {
-                    var ch = text.charCodeAt(pos);
-                    if (ch === 45 || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
-                        pos++;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
-            }
-            return token;
-        }
-        function scanJSDocToken() {
-            if (pos >= end) {
-                return token = 1;
-            }
-            startPos = pos;
-            var ch = text.charCodeAt(pos);
-            while (pos < end) {
-                ch = text.charCodeAt(pos);
-                if (isWhiteSpace(ch)) {
-                    pos++;
-                }
-                else {
-                    break;
-                }
-            }
-            tokenPos = pos;
-            switch (ch) {
-                case 64:
-                    return pos += 1, token = 55;
-                case 10:
-                case 13:
-                    return pos += 1, token = 4;
-                case 42:
-                    return pos += 1, token = 37;
-                case 123:
-                    return pos += 1, token = 15;
-                case 125:
-                    return pos += 1, token = 16;
-                case 91:
-                    return pos += 1, token = 19;
-                case 93:
-                    return pos += 1, token = 20;
-                case 61:
-                    return pos += 1, token = 56;
-                case 44:
-                    return pos += 1, token = 24;
-            }
-            if (isIdentifierStart(ch, 2)) {
-                pos++;
-                while (isIdentifierPart(text.charCodeAt(pos), 2) && pos < end) {
-                    pos++;
-                }
-                return token = 69;
-            }
-            else {
-                return pos += 1, token = 0;
-            }
-        }
-        function speculationHelper(callback, isLookahead) {
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var saveTokenValue = tokenValue;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var result = callback();
-            if (!result || isLookahead) {
-                pos = savePos;
-                startPos = saveStartPos;
-                tokenPos = saveTokenPos;
-                token = saveToken;
-                tokenValue = saveTokenValue;
-                precedingLineBreak = savePrecedingLineBreak;
-            }
-            return result;
-        }
-        function scanRange(start, length, callback) {
-            var saveEnd = end;
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var saveTokenValue = tokenValue;
-            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
-            var saveTokenIsUnterminated = tokenIsUnterminated;
-            setText(text, start, length);
-            var result = callback();
-            end = saveEnd;
-            pos = savePos;
-            startPos = saveStartPos;
-            tokenPos = saveTokenPos;
-            token = saveToken;
-            precedingLineBreak = savePrecedingLineBreak;
-            tokenValue = saveTokenValue;
-            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
-            tokenIsUnterminated = saveTokenIsUnterminated;
-            return result;
-        }
-        function lookAhead(callback) {
-            return speculationHelper(callback, true);
-        }
-        function tryScan(callback) {
-            return speculationHelper(callback, false);
-        }
-        function setText(newText, start, length) {
-            text = newText || "";
-            end = length === undefined ? text.length : start + length;
-            setTextPos(start || 0);
-        }
-        function setOnError(errorCallback) {
-            onError = errorCallback;
-        }
-        function setScriptTarget(scriptTarget) {
-            languageVersion = scriptTarget;
-        }
-        function setLanguageVariant(variant) {
-            languageVariant = variant;
-        }
-        function setTextPos(textPos) {
-            ts.Debug.assert(textPos >= 0);
-            pos = textPos;
-            startPos = textPos;
-            tokenPos = textPos;
-            token = 0;
-            precedingLineBreak = false;
-            tokenValue = undefined;
-            hasExtendedUnicodeEscape = false;
-            tokenIsUnterminated = false;
-        }
-    }
-    ts.createScanner = createScanner;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.optionDeclarations = [
-        {
-            name: "charset",
-            type: "string"
-        },
-        {
-            name: "declaration",
-            shortName: "d",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_d_ts_file
-        },
-        {
-            name: "declarationDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "diagnostics",
-            type: "boolean"
-        },
-        {
-            name: "emitBOM",
-            type: "boolean"
-        },
-        {
-            name: "help",
-            shortName: "h",
-            type: "boolean",
-            description: ts.Diagnostics.Print_this_message
-        },
-        {
-            name: "help",
-            shortName: "?",
-            type: "boolean"
-        },
-        {
-            name: "init",
-            type: "boolean",
-            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file
-        },
-        {
-            name: "inlineSourceMap",
-            type: "boolean"
-        },
-        {
-            name: "inlineSources",
-            type: "boolean"
-        },
-        {
-            name: "jsx",
-            type: {
-                "preserve": 1,
-                "react": 2
-            },
-            paramType: ts.Diagnostics.KIND,
-            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_or_react
-        },
-        {
-            name: "reactNamespace",
-            type: "string",
-            description: ts.Diagnostics.Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit
-        },
-        {
-            name: "listFiles",
-            type: "boolean"
-        },
-        {
-            name: "locale",
-            type: "string"
-        },
-        {
-            name: "mapRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
-            paramType: ts.Diagnostics.LOCATION
-        },
-        {
-            name: "module",
-            shortName: "m",
-            type: {
-                "none": ts.ModuleKind.None,
-                "commonjs": ts.ModuleKind.CommonJS,
-                "amd": ts.ModuleKind.AMD,
-                "system": ts.ModuleKind.System,
-                "umd": ts.ModuleKind.UMD,
-                "es6": ts.ModuleKind.ES6,
-                "es2015": ts.ModuleKind.ES2015
-            },
-            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
-            paramType: ts.Diagnostics.KIND
-        },
-        {
-            name: "newLine",
-            type: {
-                "crlf": 0,
-                "lf": 1
-            },
-            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
-            paramType: ts.Diagnostics.NEWLINE
-        },
-        {
-            name: "noEmit",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs
-        },
-        {
-            name: "noEmitHelpers",
-            type: "boolean"
-        },
-        {
-            name: "noEmitOnError",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported
-        },
-        {
-            name: "noImplicitAny",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type
-        },
-        {
-            name: "noImplicitThis",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type
-        },
-        {
-            name: "noLib",
-            type: "boolean"
-        },
-        {
-            name: "noResolve",
-            type: "boolean"
-        },
-        {
-            name: "skipDefaultLibCheck",
-            type: "boolean"
-        },
-        {
-            name: "skipLibCheck",
-            type: "boolean",
-            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
-        },
-        {
-            name: "out",
-            type: "string",
-            isFilePath: false,
-            paramType: ts.Diagnostics.FILE
-        },
-        {
-            name: "outFile",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
-            paramType: ts.Diagnostics.FILE
-        },
-        {
-            name: "outDir",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "preserveConstEnums",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
-        },
-        {
-            name: "pretty",
-            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental,
-            type: "boolean"
-        },
-        {
-            name: "project",
-            shortName: "p",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Compile_the_project_in_the_given_directory,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "removeComments",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_comments_to_output
-        },
-        {
-            name: "rootDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.LOCATION,
-            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir
-        },
-        {
-            name: "isolatedModules",
-            type: "boolean"
-        },
-        {
-            name: "sourceMap",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_map_file
-        },
-        {
-            name: "sourceRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
-            paramType: ts.Diagnostics.LOCATION
-        },
-        {
-            name: "suppressExcessPropertyErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
-            experimental: true
-        },
-        {
-            name: "suppressImplicitAnyIndexErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures
-        },
-        {
-            name: "stripInternal",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
-            experimental: true
-        },
-        {
-            name: "target",
-            shortName: "t",
-            type: {
-                "es3": 0,
-                "es5": 1,
-                "es6": 2,
-                "es2015": 2
-            },
-            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
-            paramType: ts.Diagnostics.VERSION
-        },
-        {
-            name: "version",
-            shortName: "v",
-            type: "boolean",
-            description: ts.Diagnostics.Print_the_compiler_s_version
-        },
-        {
-            name: "watch",
-            shortName: "w",
-            type: "boolean",
-            description: ts.Diagnostics.Watch_input_files
-        },
-        {
-            name: "experimentalDecorators",
-            type: "boolean",
-            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
-        },
-        {
-            name: "emitDecoratorMetadata",
-            type: "boolean",
-            experimental: true,
-            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
-        },
-        {
-            name: "moduleResolution",
-            type: {
-                "node": ts.ModuleResolutionKind.NodeJs,
-                "classic": ts.ModuleResolutionKind.Classic
-            },
-            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6
-        },
-        {
-            name: "allowUnusedLabels",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
-        },
-        {
-            name: "noImplicitReturns",
-            type: "boolean",
-            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
-        },
-        {
-            name: "noFallthroughCasesInSwitch",
-            type: "boolean",
-            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
-        },
-        {
-            name: "allowUnreachableCode",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
-        },
-        {
-            name: "forceConsistentCasingInFileNames",
-            type: "boolean",
-            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
-        },
-        {
-            name: "baseUrl",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
-        },
-        {
-            name: "paths",
-            type: "object",
-            isTSConfigOnly: true
-        },
-        {
-            name: "rootDirs",
-            type: "list",
-            isTSConfigOnly: true,
-            element: {
-                name: "rootDirs",
-                type: "string",
-                isFilePath: true
-            }
-        },
-        {
-            name: "typesSearchPaths",
-            type: "list",
-            isTSConfigOnly: true,
-            element: {
-                name: "typesSearchPaths",
-                type: "string",
-                isFilePath: true
-            }
-        },
-        {
-            name: "typesRoot",
-            type: "string"
-        },
-        {
-            name: "types",
-            type: "list",
-            element: {
-                name: "types",
-                type: "string"
-            },
-            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
-        },
-        {
-            name: "traceResolution",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
-        },
-        {
-            name: "allowJs",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
-        },
-        {
-            name: "allowSyntheticDefaultImports",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
-        },
-        {
-            name: "noImplicitUseStrict",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
-        },
-        {
-            name: "listEmittedFiles",
-            type: "boolean"
-        },
-        {
-            name: "lib",
-            type: "list",
-            element: {
-                name: "lib",
-                type: {
-                    "es5": "lib.es5.d.ts",
-                    "es6": "lib.es2015.d.ts",
-                    "es2015": "lib.es2015.d.ts",
-                    "es7": "lib.es2016.d.ts",
-                    "es2016": "lib.es2016.d.ts",
-                    "es2017": "lib.es2017.d.ts",
-                    "dom": "lib.dom.d.ts",
-                    "webworker": "lib.webworker.d.ts",
-                    "scripthost": "lib.scripthost.d.ts",
-                    "es2015.core": "lib.es2015.core.d.ts",
-                    "es2015.collection": "lib.es2015.collection.d.ts",
-                    "es2015.generator": "lib.es2015.generator.d.ts",
-                    "es2015.iterable": "lib.es2015.iterable.d.ts",
-                    "es2015.promise": "lib.es2015.promise.d.ts",
-                    "es2015.proxy": "lib.es2015.proxy.d.ts",
-                    "es2015.reflect": "lib.es2015.reflect.d.ts",
-                    "es2015.symbol": "lib.es2015.symbol.d.ts",
-                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
-                    "es2016.array.include": "lib.es2016.array.include.d.ts",
-                    "es2017.object": "lib.es2017.object.d.ts"
-                }
-            },
-            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
-        },
-        {
-            name: "strictNullChecks",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_strict_null_checks
-        }
-    ];
-    ts.typingOptionDeclarations = [
-        {
-            name: "enableAutoDiscovery",
-            type: "boolean"
-        },
-        {
-            name: "include",
-            type: "list",
-            element: {
-                name: "include",
-                type: "string"
-            }
-        },
-        {
-            name: "exclude",
-            type: "list",
-            element: {
-                name: "exclude",
-                type: "string"
-            }
-        }
-    ];
-    var optionNameMapCache;
-    function getOptionNameMap() {
-        if (optionNameMapCache) {
-            return optionNameMapCache;
-        }
-        var optionNameMap = {};
-        var shortOptionNames = {};
-        ts.forEach(ts.optionDeclarations, function (option) {
-            optionNameMap[option.name.toLowerCase()] = option;
-            if (option.shortName) {
-                shortOptionNames[option.shortName] = option.name;
-            }
-        });
-        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
-        return optionNameMapCache;
-    }
-    ts.getOptionNameMap = getOptionNameMap;
-    function createCompilerDiagnosticForInvalidCustomType(opt) {
-        var namesOfType = [];
-        ts.forEachKey(opt.type, function (key) {
-            namesOfType.push(" '" + key + "'");
-        });
-        return ts.createCompilerDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
-    }
-    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
-    function parseCustomTypeOption(opt, value, errors) {
-        var key = trimString((value || "")).toLowerCase();
-        var map = opt.type;
-        if (ts.hasProperty(map, key)) {
-            return map[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
-    }
-    ts.parseCustomTypeOption = parseCustomTypeOption;
-    function parseListTypeOption(opt, value, errors) {
-        var values = trimString((value || "")).split(",");
-        switch (opt.element.type) {
-            case "number":
-                return ts.map(values, parseInt);
-            case "string":
-                return ts.map(values, function (v) { return v || ""; });
-            default:
-                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
-        }
-    }
-    ts.parseListTypeOption = parseListTypeOption;
-    function parseCommandLine(commandLine, readFile) {
-        var options = {};
-        var fileNames = [];
-        var errors = [];
-        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
-        parseStrings(commandLine);
-        return {
-            options: options,
-            fileNames: fileNames,
-            errors: errors
-        };
-        function parseStrings(args) {
-            var i = 0;
-            while (i < args.length) {
-                var s = args[i];
-                i++;
-                if (s.charCodeAt(0) === 64) {
-                    parseResponseFile(s.slice(1));
-                }
-                else if (s.charCodeAt(0) === 45) {
-                    s = s.slice(s.charCodeAt(1) === 45 ? 2 : 1).toLowerCase();
-                    if (ts.hasProperty(shortOptionNames, s)) {
-                        s = shortOptionNames[s];
-                    }
-                    if (ts.hasProperty(optionNameMap, s)) {
-                        var opt = optionNameMap[s];
-                        if (opt.isTSConfigOnly) {
-                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
-                        }
-                        else {
-                            if (!args[i] && opt.type !== "boolean") {
-                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
-                            }
-                            switch (opt.type) {
-                                case "number":
-                                    options[opt.name] = parseInt(args[i]);
-                                    i++;
-                                    break;
-                                case "boolean":
-                                    options[opt.name] = true;
-                                    break;
-                                case "string":
-                                    options[opt.name] = args[i] || "";
-                                    i++;
-                                    break;
-                                case "list":
-                                    options[opt.name] = parseListTypeOption(opt, args[i], errors);
-                                    i++;
-                                    break;
-                                default:
-                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
-                                    i++;
-                                    break;
-                            }
-                        }
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
-                    }
-                }
-                else {
-                    fileNames.push(s);
-                }
-            }
-        }
-        function parseResponseFile(fileName) {
-            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
-            if (!text) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
-                return;
-            }
-            var args = [];
-            var pos = 0;
-            while (true) {
-                while (pos < text.length && text.charCodeAt(pos) <= 32)
-                    pos++;
-                if (pos >= text.length)
-                    break;
-                var start = pos;
-                if (text.charCodeAt(start) === 34) {
-                    pos++;
-                    while (pos < text.length && text.charCodeAt(pos) !== 34)
-                        pos++;
-                    if (pos < text.length) {
-                        args.push(text.substring(start + 1, pos));
-                        pos++;
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
-                    }
-                }
-                else {
-                    while (text.charCodeAt(pos) > 32)
-                        pos++;
-                    args.push(text.substring(start, pos));
-                }
-            }
-            parseStrings(args);
-        }
-    }
-    ts.parseCommandLine = parseCommandLine;
-    function readConfigFile(fileName, readFile) {
-        var text = "";
-        try {
-            text = readFile(fileName);
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
-        }
-        return parseConfigFileTextToJson(fileName, text);
-    }
-    ts.readConfigFile = readConfigFile;
-    function parseConfigFileTextToJson(fileName, jsonText) {
-        try {
-            var jsonTextWithoutComments = removeComments(jsonText);
-            return { config: /\S/.test(jsonTextWithoutComments) ? JSON.parse(jsonTextWithoutComments) : {} };
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) };
-        }
-    }
-    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
-    function removeComments(jsonText) {
-        var output = "";
-        var scanner = ts.createScanner(1, false, 0, jsonText);
-        var token;
-        while ((token = scanner.scan()) !== 1) {
-            switch (token) {
-                case 2:
-                case 3:
-                    output += scanner.getTokenText().replace(/\S/g, " ");
-                    break;
-                default:
-                    output += scanner.getTokenText();
-                    break;
-            }
-        }
-        return output;
-    }
-    var IgnoreFileNamePattern = /(\.min\.js$)|([\\/]\.[\w.])/;
-    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName) {
-        if (existingOptions === void 0) { existingOptions = {}; }
-        var errors = [];
-        var compilerOptions = convertCompilerOptionsFromJsonWorker(json["compilerOptions"], basePath, errors, configFileName);
-        var options = ts.extend(existingOptions, compilerOptions);
-        var typingOptions = convertTypingOptionsFromJsonWorker(json["typingOptions"], basePath, errors, configFileName);
-        options.configFilePath = configFileName;
-        var fileNames = getFileNames(errors);
-        return {
-            options: options,
-            fileNames: fileNames,
-            typingOptions: typingOptions,
-            raw: json,
-            errors: errors
-        };
-        function getFileNames(errors) {
-            var fileNames = [];
-            if (ts.hasProperty(json, "files")) {
-                if (ts.isArray(json["files"])) {
-                    fileNames = ts.map(json["files"], function (s) { return ts.combinePaths(basePath, s); });
-                }
-                else {
-                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
-                }
-            }
-            else {
-                var filesSeen = {};
-                var exclude = [];
-                if (ts.isArray(json["exclude"])) {
-                    exclude = json["exclude"];
-                }
-                else {
-                    exclude = ["node_modules", "bower_components", "jspm_packages"];
-                }
-                var outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
-                if (outDir) {
-                    exclude.push(outDir);
-                }
-                exclude = ts.map(exclude, ts.normalizeSlashes);
-                var supportedExtensions = ts.getSupportedExtensions(options);
-                ts.Debug.assert(ts.indexOf(supportedExtensions, ".ts") < ts.indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
-                for (var _i = 0, supportedExtensions_1 = supportedExtensions; _i < supportedExtensions_1.length; _i++) {
-                    var extension = supportedExtensions_1[_i];
-                    var filesInDirWithExtension = host.readDirectory(basePath, extension, exclude);
-                    for (var _a = 0, filesInDirWithExtension_1 = filesInDirWithExtension; _a < filesInDirWithExtension_1.length; _a++) {
-                        var fileName = filesInDirWithExtension_1[_a];
-                        if (extension === ".ts" && ts.fileExtensionIs(fileName, ".d.ts")) {
-                            continue;
-                        }
-                        if (IgnoreFileNamePattern.test(fileName)) {
-                            continue;
-                        }
-                        if (extension === ".d.ts" || (options.allowJs && ts.contains(ts.supportedJavascriptExtensions, extension))) {
-                            var baseName = fileName.substr(0, fileName.length - extension.length);
-                            if (ts.hasProperty(filesSeen, baseName + ".ts") || ts.hasProperty(filesSeen, baseName + ".tsx")) {
-                                continue;
-                            }
-                        }
-                        filesSeen[fileName] = true;
-                        fileNames.push(fileName);
-                    }
-                }
-            }
-            if (ts.hasProperty(json, "excludes") && !ts.hasProperty(json, "exclude")) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
-            }
-            return fileNames;
-        }
-    }
-    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
-    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
-    }
-    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
-    function convertTypingOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
-    }
-    ts.convertTypingOptionsFromJson = convertTypingOptionsFromJson;
-    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json" ? { allowJs: true } : {};
-        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
-        return options;
-    }
-    function convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
-            ? { enableAutoDiscovery: true, include: [], exclude: [] }
-            : { enableAutoDiscovery: false, include: [], exclude: [] };
-        convertOptionsFromJson(ts.typingOptionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_typing_option_0, errors);
-        return options;
-    }
-    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
-        if (!jsonOptions) {
-            return;
-        }
-        var optionNameMap = ts.arrayToMap(optionDeclarations, function (opt) { return opt.name; });
-        for (var id in jsonOptions) {
-            if (ts.hasProperty(optionNameMap, id)) {
-                var opt = optionNameMap[id];
-                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
-            }
-            else {
-                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
-            }
-        }
-    }
-    function convertJsonOption(opt, value, basePath, errors) {
-        var optType = opt.type;
-        var expectedType = typeof optType === "string" ? optType : "string";
-        if (optType === "list" && ts.isArray(value)) {
-            return convertJsonOptionOfListType(opt, value, basePath, errors);
-        }
-        else if (typeof value === expectedType) {
-            if (typeof optType !== "string") {
-                return convertJsonOptionOfCustomType(opt, value, errors);
-            }
-            else {
-                if (opt.isFilePath) {
-                    value = ts.normalizePath(ts.combinePaths(basePath, value));
-                    if (value === "") {
-                        value = ".";
-                    }
-                }
-            }
-            return value;
-        }
-        else {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, expectedType));
-        }
-    }
-    function convertJsonOptionOfCustomType(opt, value, errors) {
-        var key = value.toLowerCase();
-        if (ts.hasProperty(opt.type, key)) {
-            return opt.type[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
-    }
-    function convertJsonOptionOfListType(option, values, basePath, errors) {
-        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
-    }
-    function trimString(s) {
-        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
-    }
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getDeclarationOfKind(symbol, kind) {
-        var declarations = symbol.declarations;
-        if (declarations) {
-            for (var _i = 0, declarations_1 = declarations; _i < declarations_1.length; _i++) {
-                var declaration = declarations_1[_i];
-                if (declaration.kind === kind) {
-                    return declaration;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getDeclarationOfKind = getDeclarationOfKind;
-    var stringWriters = [];
-    function getSingleLineStringWriter() {
-        if (stringWriters.length === 0) {
-            var str_1 = "";
-            var writeText = function (text) { return str_1 += text; };
-            return {
-                string: function () { return str_1; },
-                writeKeyword: writeText,
-                writeOperator: writeText,
-                writePunctuation: writeText,
-                writeSpace: writeText,
-                writeStringLiteral: writeText,
-                writeParameter: writeText,
-                writeSymbol: writeText,
-                writeLine: function () { return str_1 += " "; },
-                increaseIndent: function () { },
-                decreaseIndent: function () { },
-                clear: function () { return str_1 = ""; },
-                trackSymbol: function () { },
-                reportInaccessibleThisError: function () { }
-            };
-        }
-        return stringWriters.pop();
-    }
-    ts.getSingleLineStringWriter = getSingleLineStringWriter;
-    function releaseStringWriter(writer) {
-        writer.clear();
-        stringWriters.push(writer);
-    }
-    ts.releaseStringWriter = releaseStringWriter;
-    function getFullWidth(node) {
-        return node.end - node.pos;
-    }
-    ts.getFullWidth = getFullWidth;
-    function mapIsEqualTo(map1, map2) {
-        if (!map1 || !map2) {
-            return map1 === map2;
-        }
-        return containsAll(map1, map2) && containsAll(map2, map1);
-    }
-    ts.mapIsEqualTo = mapIsEqualTo;
-    function containsAll(map, other) {
-        for (var key in map) {
-            if (!ts.hasProperty(map, key)) {
-                continue;
-            }
-            if (!ts.hasProperty(other, key) || map[key] !== other[key]) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function arrayIsEqualTo(array1, array2, equaler) {
-        if (!array1 || !array2) {
-            return array1 === array2;
-        }
-        if (array1.length !== array2.length) {
-            return false;
-        }
-        for (var i = 0; i < array1.length; i++) {
-            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
-            if (!equals) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.arrayIsEqualTo = arrayIsEqualTo;
-    function hasResolvedModule(sourceFile, moduleNameText) {
-        return sourceFile.resolvedModules && ts.hasProperty(sourceFile.resolvedModules, moduleNameText);
-    }
-    ts.hasResolvedModule = hasResolvedModule;
-    function getResolvedModule(sourceFile, moduleNameText) {
-        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
-    }
-    ts.getResolvedModule = getResolvedModule;
-    function setResolvedModule(sourceFile, moduleNameText, resolvedModule) {
-        if (!sourceFile.resolvedModules) {
-            sourceFile.resolvedModules = {};
-        }
-        sourceFile.resolvedModules[moduleNameText] = resolvedModule;
-    }
-    ts.setResolvedModule = setResolvedModule;
-    function setResolvedTypeReferenceDirective(sourceFile, typeReferenceDirectiveName, resolvedTypeReferenceDirective) {
-        if (!sourceFile.resolvedTypeReferenceDirectiveNames) {
-            sourceFile.resolvedTypeReferenceDirectiveNames = {};
-        }
-        sourceFile.resolvedTypeReferenceDirectiveNames[typeReferenceDirectiveName] = resolvedTypeReferenceDirective;
-    }
-    ts.setResolvedTypeReferenceDirective = setResolvedTypeReferenceDirective;
-    function moduleResolutionIsEqualTo(oldResolution, newResolution) {
-        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport;
-    }
-    ts.moduleResolutionIsEqualTo = moduleResolutionIsEqualTo;
-    function typeDirectiveIsEqualTo(oldResolution, newResolution) {
-        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.primary === newResolution.primary;
-    }
-    ts.typeDirectiveIsEqualTo = typeDirectiveIsEqualTo;
-    function hasChangesInResolutions(names, newResolutions, oldResolutions, comparer) {
-        if (names.length !== newResolutions.length) {
-            return false;
-        }
-        for (var i = 0; i < names.length; i++) {
-            var newResolution = newResolutions[i];
-            var oldResolution = oldResolutions && ts.hasProperty(oldResolutions, names[i]) ? oldResolutions[names[i]] : undefined;
-            var changed = oldResolution
-                ? !newResolution || !comparer(oldResolution, newResolution)
-                : newResolution;
-            if (changed) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.hasChangesInResolutions = hasChangesInResolutions;
-    function containsParseError(node) {
-        aggregateChildData(node);
-        return (node.flags & 268435456) !== 0;
-    }
-    ts.containsParseError = containsParseError;
-    function aggregateChildData(node) {
-        if (!(node.flags & 536870912)) {
-            var thisNodeOrAnySubNodesHasError = ((node.flags & 67108864) !== 0) ||
-                ts.forEachChild(node, containsParseError);
-            if (thisNodeOrAnySubNodesHasError) {
-                node.flags |= 268435456;
-            }
-            node.flags |= 536870912;
-        }
-    }
-    function getSourceFileOfNode(node) {
-        while (node && node.kind !== 256) {
-            node = node.parent;
-        }
-        return node;
-    }
-    ts.getSourceFileOfNode = getSourceFileOfNode;
-    function isStatementWithLocals(node) {
-        switch (node.kind) {
-            case 199:
-            case 227:
-            case 206:
-            case 207:
-            case 208:
-                return true;
-        }
-        return false;
-    }
-    ts.isStatementWithLocals = isStatementWithLocals;
-    function getStartPositionOfLine(line, sourceFile) {
-        ts.Debug.assert(line >= 0);
-        return ts.getLineStarts(sourceFile)[line];
-    }
-    ts.getStartPositionOfLine = getStartPositionOfLine;
-    function nodePosToString(node) {
-        var file = getSourceFileOfNode(node);
-        var loc = ts.getLineAndCharacterOfPosition(file, node.pos);
-        return file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + ")";
-    }
-    ts.nodePosToString = nodePosToString;
-    function getStartPosOfNode(node) {
-        return node.pos;
-    }
-    ts.getStartPosOfNode = getStartPosOfNode;
-    function getEndLinePosition(line, sourceFile) {
-        ts.Debug.assert(line >= 0);
-        var lineStarts = ts.getLineStarts(sourceFile);
-        var lineIndex = line;
-        var sourceText = sourceFile.text;
-        if (lineIndex + 1 === lineStarts.length) {
-            return sourceText.length - 1;
-        }
-        else {
-            var start = lineStarts[lineIndex];
-            var pos = lineStarts[lineIndex + 1] - 1;
-            ts.Debug.assert(ts.isLineBreak(sourceText.charCodeAt(pos)));
-            while (start <= pos && ts.isLineBreak(sourceText.charCodeAt(pos))) {
-                pos--;
-            }
-            return pos;
-        }
-    }
-    ts.getEndLinePosition = getEndLinePosition;
-    function nodeIsMissing(node) {
-        if (!node) {
-            return true;
-        }
-        return node.pos === node.end && node.pos >= 0 && node.kind !== 1;
-    }
-    ts.nodeIsMissing = nodeIsMissing;
-    function nodeIsPresent(node) {
-        return !nodeIsMissing(node);
-    }
-    ts.nodeIsPresent = nodeIsPresent;
-    function getTokenPosOfNode(node, sourceFile) {
-        if (nodeIsMissing(node)) {
-            return node.pos;
-        }
-        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
-    }
-    ts.getTokenPosOfNode = getTokenPosOfNode;
-    function getNonDecoratorTokenPosOfNode(node, sourceFile) {
-        if (nodeIsMissing(node) || !node.decorators) {
-            return getTokenPosOfNode(node, sourceFile);
-        }
-        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.decorators.end);
-    }
-    ts.getNonDecoratorTokenPosOfNode = getNonDecoratorTokenPosOfNode;
-    function getSourceTextOfNodeFromSourceFile(sourceFile, node, includeTrivia) {
-        if (includeTrivia === void 0) { includeTrivia = false; }
-        if (nodeIsMissing(node)) {
-            return "";
-        }
-        var text = sourceFile.text;
-        return text.substring(includeTrivia ? node.pos : ts.skipTrivia(text, node.pos), node.end);
-    }
-    ts.getSourceTextOfNodeFromSourceFile = getSourceTextOfNodeFromSourceFile;
-    function getTextOfNodeFromSourceText(sourceText, node) {
-        if (nodeIsMissing(node)) {
-            return "";
-        }
-        return sourceText.substring(ts.skipTrivia(sourceText, node.pos), node.end);
-    }
-    ts.getTextOfNodeFromSourceText = getTextOfNodeFromSourceText;
-    function getTextOfNode(node, includeTrivia) {
-        if (includeTrivia === void 0) { includeTrivia = false; }
-        return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
-    }
-    ts.getTextOfNode = getTextOfNode;
-    function escapeIdentifier(identifier) {
-        return identifier.length >= 2 && identifier.charCodeAt(0) === 95 && identifier.charCodeAt(1) === 95 ? "_" + identifier : identifier;
-    }
-    ts.escapeIdentifier = escapeIdentifier;
-    function unescapeIdentifier(identifier) {
-        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 && identifier.charCodeAt(1) === 95 && identifier.charCodeAt(2) === 95 ? identifier.substr(1) : identifier;
-    }
-    ts.unescapeIdentifier = unescapeIdentifier;
-    function makeIdentifierFromModuleName(moduleName) {
-        return ts.getBaseFileName(moduleName).replace(/^(\d)/, "_$1").replace(/\W/g, "_");
-    }
-    ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
-    function isBlockOrCatchScoped(declaration) {
-        return (getCombinedNodeFlags(declaration) & 3072) !== 0 ||
-            isCatchClauseVariableDeclaration(declaration);
-    }
-    ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
-    function isAmbientModule(node) {
-        return node && node.kind === 225 &&
-            (node.name.kind === 9 || isGlobalScopeAugmentation(node));
-    }
-    ts.isAmbientModule = isAmbientModule;
-    function isBlockScopedContainerTopLevel(node) {
-        return node.kind === 256 ||
-            node.kind === 225 ||
-            isFunctionLike(node) ||
-            isFunctionBlock(node);
-    }
-    ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
-    function isGlobalScopeAugmentation(module) {
-        return !!(module.flags & 131072);
-    }
-    ts.isGlobalScopeAugmentation = isGlobalScopeAugmentation;
-    function isExternalModuleAugmentation(node) {
-        if (!node || !isAmbientModule(node)) {
-            return false;
-        }
-        switch (node.parent.kind) {
-            case 256:
-                return ts.isExternalModule(node.parent);
-            case 226:
-                return isAmbientModule(node.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
-        }
-        return false;
-    }
-    ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
-    function getEnclosingBlockScopeContainer(node) {
-        var current = node.parent;
-        while (current) {
-            if (isFunctionLike(current)) {
-                return current;
-            }
-            switch (current.kind) {
-                case 256:
-                case 227:
-                case 252:
-                case 225:
-                case 206:
-                case 207:
-                case 208:
-                    return current;
-                case 199:
-                    if (!isFunctionLike(current.parent)) {
-                        return current;
-                    }
-            }
-            current = current.parent;
-        }
-    }
-    ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
-    function isCatchClauseVariableDeclaration(declaration) {
-        return declaration &&
-            declaration.kind === 218 &&
-            declaration.parent &&
-            declaration.parent.kind === 252;
-    }
-    ts.isCatchClauseVariableDeclaration = isCatchClauseVariableDeclaration;
-    function declarationNameToString(name) {
-        return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
-    }
-    ts.declarationNameToString = declarationNameToString;
-    function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
-        var sourceFile = getSourceFileOfNode(node);
-        var span = getErrorSpanForNode(sourceFile, node);
-        return ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2);
-    }
-    ts.createDiagnosticForNode = createDiagnosticForNode;
-    function createDiagnosticForNodeFromMessageChain(node, messageChain) {
-        var sourceFile = getSourceFileOfNode(node);
-        var span = getErrorSpanForNode(sourceFile, node);
-        return {
-            file: sourceFile,
-            start: span.start,
-            length: span.length,
-            code: messageChain.code,
-            category: messageChain.category,
-            messageText: messageChain.next ? messageChain : messageChain.messageText
-        };
-    }
-    ts.createDiagnosticForNodeFromMessageChain = createDiagnosticForNodeFromMessageChain;
-    function getSpanOfTokenAtPosition(sourceFile, pos) {
-        var scanner = ts.createScanner(sourceFile.languageVersion, true, sourceFile.languageVariant, sourceFile.text, undefined, pos);
-        scanner.scan();
-        var start = scanner.getTokenPos();
-        return ts.createTextSpanFromBounds(start, scanner.getTextPos());
-    }
-    ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
-    function getErrorSpanForArrowFunction(sourceFile, node) {
-        var pos = ts.skipTrivia(sourceFile.text, node.pos);
-        if (node.body && node.body.kind === 199) {
-            var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
-            var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
-            if (startLine < endLine) {
-                return ts.createTextSpan(pos, getEndLinePosition(startLine, sourceFile) - pos + 1);
-            }
-        }
-        return ts.createTextSpanFromBounds(pos, node.end);
-    }
-    function getErrorSpanForNode(sourceFile, node) {
-        var errorNode = node;
-        switch (node.kind) {
-            case 256:
-                var pos_1 = ts.skipTrivia(sourceFile.text, 0, false);
-                if (pos_1 === sourceFile.text.length) {
-                    return ts.createTextSpan(0, 0);
-                }
-                return getSpanOfTokenAtPosition(sourceFile, pos_1);
-            case 218:
-            case 169:
-            case 221:
-            case 192:
-            case 222:
-            case 225:
-            case 224:
-            case 255:
-            case 220:
-            case 179:
-            case 147:
-            case 149:
-            case 150:
-            case 223:
-                errorNode = node.name;
-                break;
-            case 180:
-                return getErrorSpanForArrowFunction(sourceFile, node);
-        }
-        if (errorNode === undefined) {
-            return getSpanOfTokenAtPosition(sourceFile, node.pos);
-        }
-        var pos = nodeIsMissing(errorNode)
-            ? errorNode.pos
-            : ts.skipTrivia(sourceFile.text, errorNode.pos);
-        return ts.createTextSpanFromBounds(pos, errorNode.end);
-    }
-    ts.getErrorSpanForNode = getErrorSpanForNode;
-    function isExternalOrCommonJsModule(file) {
-        return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
-    }
-    ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
-    function isDeclarationFile(file) {
-        return file.isDeclarationFile;
-    }
-    ts.isDeclarationFile = isDeclarationFile;
-    function isConstEnumDeclaration(node) {
-        return node.kind === 224 && isConst(node);
-    }
-    ts.isConstEnumDeclaration = isConstEnumDeclaration;
-    function walkUpBindingElementsAndPatterns(node) {
-        while (node && (node.kind === 169 || isBindingPattern(node))) {
-            node = node.parent;
-        }
-        return node;
-    }
-    function getCombinedNodeFlags(node) {
-        node = walkUpBindingElementsAndPatterns(node);
-        var flags = node.flags;
-        if (node.kind === 218) {
-            node = node.parent;
-        }
-        if (node && node.kind === 219) {
-            flags |= node.flags;
-            node = node.parent;
-        }
-        if (node && node.kind === 200) {
-            flags |= node.flags;
-        }
-        return flags;
-    }
-    ts.getCombinedNodeFlags = getCombinedNodeFlags;
-    function isConst(node) {
-        return !!(getCombinedNodeFlags(node) & 2048);
-    }
-    ts.isConst = isConst;
-    function isLet(node) {
-        return !!(getCombinedNodeFlags(node) & 1024);
-    }
-    ts.isLet = isLet;
-    function isSuperCallExpression(n) {
-        return n.kind === 174 && n.expression.kind === 95;
-    }
-    ts.isSuperCallExpression = isSuperCallExpression;
-    function isPrologueDirective(node) {
-        return node.kind === 202 && node.expression.kind === 9;
-    }
-    ts.isPrologueDirective = isPrologueDirective;
-    function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
-        return ts.getLeadingCommentRanges(sourceFileOfNode.text, node.pos);
-    }
-    ts.getLeadingCommentRangesOfNode = getLeadingCommentRangesOfNode;
-    function getLeadingCommentRangesOfNodeFromText(node, text) {
-        return ts.getLeadingCommentRanges(text, node.pos);
-    }
-    ts.getLeadingCommentRangesOfNodeFromText = getLeadingCommentRangesOfNodeFromText;
-    function getJsDocComments(node, sourceFileOfNode) {
-        return getJsDocCommentsFromText(node, sourceFileOfNode.text);
-    }
-    ts.getJsDocComments = getJsDocComments;
-    function getJsDocCommentsFromText(node, text) {
-        var commentRanges = (node.kind === 142 || node.kind === 141) ?
-            ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
-            getLeadingCommentRangesOfNodeFromText(node, text);
-        return ts.filter(commentRanges, isJsDocComment);
-        function isJsDocComment(comment) {
-            return text.charCodeAt(comment.pos + 1) === 42 &&
-                text.charCodeAt(comment.pos + 2) === 42 &&
-                text.charCodeAt(comment.pos + 3) !== 47;
-        }
-    }
-    ts.getJsDocCommentsFromText = getJsDocCommentsFromText;
-    ts.fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
-    ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx = /^(\/\/\/\s*<reference\s+types\s*=\s*)('|")(.+?)\2.*?\/>/;
-    ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
-    function isTypeNode(node) {
-        if (154 <= node.kind && node.kind <= 166) {
-            return true;
-        }
-        switch (node.kind) {
-            case 117:
-            case 130:
-            case 132:
-            case 120:
-            case 133:
-            case 135:
-            case 127:
-                return true;
-            case 103:
-                return node.parent.kind !== 183;
-            case 194:
-                return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
-            case 69:
-                if (node.parent.kind === 139 && node.parent.right === node) {
-                    node = node.parent;
-                }
-                else if (node.parent.kind === 172 && node.parent.name === node) {
-                    node = node.parent;
-                }
-                ts.Debug.assert(node.kind === 69 || node.kind === 139 || node.kind === 172, "'node' was expected to be a qualified name, identifier or property access in 'isTypeNode'.");
-            case 139:
-            case 172:
-            case 97:
-                var parent_1 = node.parent;
-                if (parent_1.kind === 158) {
-                    return false;
-                }
-                if (154 <= parent_1.kind && parent_1.kind <= 166) {
-                    return true;
-                }
-                switch (parent_1.kind) {
-                    case 194:
-                        return !isExpressionWithTypeArgumentsInClassExtendsClause(parent_1);
-                    case 141:
-                        return node === parent_1.constraint;
-                    case 145:
-                    case 144:
-                    case 142:
-                    case 218:
-                        return node === parent_1.type;
-                    case 220:
-                    case 179:
-                    case 180:
-                    case 148:
-                    case 147:
-                    case 146:
-                    case 149:
-                    case 150:
-                        return node === parent_1.type;
-                    case 151:
-                    case 152:
-                    case 153:
-                        return node === parent_1.type;
-                    case 177:
-                        return node === parent_1.type;
-                    case 174:
-                    case 175:
-                        return parent_1.typeArguments && ts.indexOf(parent_1.typeArguments, node) >= 0;
-                    case 176:
-                        return false;
-                }
-        }
-        return false;
-    }
-    ts.isTypeNode = isTypeNode;
-    function forEachReturnStatement(body, visitor) {
-        return traverse(body);
-        function traverse(node) {
-            switch (node.kind) {
-                case 211:
-                    return visitor(node);
-                case 227:
-                case 199:
-                case 203:
-                case 204:
-                case 205:
-                case 206:
-                case 207:
-                case 208:
-                case 212:
-                case 213:
-                case 249:
-                case 250:
-                case 214:
-                case 216:
-                case 252:
-                    return ts.forEachChild(node, traverse);
-            }
-        }
-    }
-    ts.forEachReturnStatement = forEachReturnStatement;
-    function forEachYieldExpression(body, visitor) {
-        return traverse(body);
-        function traverse(node) {
-            switch (node.kind) {
-                case 190:
-                    visitor(node);
-                    var operand = node.expression;
-                    if (operand) {
-                        traverse(operand);
-                    }
-                case 224:
-                case 222:
-                case 225:
-                case 223:
-                case 221:
-                case 192:
-                    return;
-                default:
-                    if (isFunctionLike(node)) {
-                        var name_5 = node.name;
-                        if (name_5 && name_5.kind === 140) {
-                            traverse(name_5.expression);
-                            return;
-                        }
-                    }
-                    else if (!isTypeNode(node)) {
-                        ts.forEachChild(node, traverse);
-                    }
-            }
-        }
-    }
-    ts.forEachYieldExpression = forEachYieldExpression;
-    function isVariableLike(node) {
-        if (node) {
-            switch (node.kind) {
-                case 169:
-                case 255:
-                case 142:
-                case 253:
-                case 145:
-                case 144:
-                case 254:
-                case 218:
-                    return true;
-            }
-        }
-        return false;
-    }
-    ts.isVariableLike = isVariableLike;
-    function isAccessor(node) {
-        return node && (node.kind === 149 || node.kind === 150);
-    }
-    ts.isAccessor = isAccessor;
-    function isClassLike(node) {
-        return node && (node.kind === 221 || node.kind === 192);
-    }
-    ts.isClassLike = isClassLike;
-    function isFunctionLike(node) {
-        return node && isFunctionLikeKind(node.kind);
-    }
-    ts.isFunctionLike = isFunctionLike;
-    function isFunctionLikeKind(kind) {
-        switch (kind) {
-            case 148:
-            case 179:
-            case 220:
-            case 180:
-            case 147:
-            case 146:
-            case 149:
-            case 150:
-            case 151:
-            case 152:
-            case 153:
-            case 156:
-            case 157:
-                return true;
-        }
-    }
-    ts.isFunctionLikeKind = isFunctionLikeKind;
-    function introducesArgumentsExoticObject(node) {
-        switch (node.kind) {
-            case 147:
-            case 146:
-            case 148:
-            case 149:
-            case 150:
-            case 220:
-            case 179:
-                return true;
-        }
-        return false;
-    }
-    ts.introducesArgumentsExoticObject = introducesArgumentsExoticObject;
-    function isIterationStatement(node, lookInLabeledStatements) {
-        switch (node.kind) {
-            case 206:
-            case 207:
-            case 208:
-            case 204:
-            case 205:
-                return true;
-            case 214:
-                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
-        }
-        return false;
-    }
-    ts.isIterationStatement = isIterationStatement;
-    function isFunctionBlock(node) {
-        return node && node.kind === 199 && isFunctionLike(node.parent);
-    }
-    ts.isFunctionBlock = isFunctionBlock;
-    function isObjectLiteralMethod(node) {
-        return node && node.kind === 147 && node.parent.kind === 171;
-    }
-    ts.isObjectLiteralMethod = isObjectLiteralMethod;
-    function isIdentifierTypePredicate(predicate) {
-        return predicate && predicate.kind === 1;
-    }
-    ts.isIdentifierTypePredicate = isIdentifierTypePredicate;
-    function isThisTypePredicate(predicate) {
-        return predicate && predicate.kind === 0;
-    }
-    ts.isThisTypePredicate = isThisTypePredicate;
-    function getContainingFunction(node) {
-        while (true) {
-            node = node.parent;
-            if (!node || isFunctionLike(node)) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingFunction = getContainingFunction;
-    function getContainingFunctionOrModule(node) {
-        while (true) {
-            node = node.parent;
-            if (isFunctionLike(node) || node.kind === 225 || node.kind === 256) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingFunctionOrModule = getContainingFunctionOrModule;
-    function getContainingClass(node) {
-        while (true) {
-            node = node.parent;
-            if (!node || isClassLike(node)) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingClass = getContainingClass;
-    function getThisContainer(node, includeArrowFunctions) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return undefined;
-            }
-            switch (node.kind) {
-                case 140:
-                    if (isClassLike(node.parent.parent)) {
-                        return node;
-                    }
-                    node = node.parent;
-                    break;
-                case 143:
-                    if (node.parent.kind === 142 && isClassElement(node.parent.parent)) {
-                        node = node.parent.parent;
-                    }
-                    else if (isClassElement(node.parent)) {
-                        node = node.parent;
-                    }
-                    break;
-                case 180:
-                    if (!includeArrowFunctions) {
-                        continue;
-                    }
-                case 220:
-                case 179:
-                case 225:
-                case 145:
-                case 144:
-                case 147:
-                case 146:
-                case 148:
-                case 149:
-                case 150:
-                case 151:
-                case 152:
-                case 153:
-                case 224:
-                case 256:
-                    return node;
-            }
-        }
-    }
-    ts.getThisContainer = getThisContainer;
-    function getSuperContainer(node, stopOnFunctions) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return node;
-            }
-            switch (node.kind) {
-                case 140:
-                    node = node.parent;
-                    break;
-                case 220:
-                case 179:
-                case 180:
-                    if (!stopOnFunctions) {
-                        continue;
-                    }
-                case 145:
-                case 144:
-                case 147:
-                case 146:
-                case 148:
-                case 149:
-                case 150:
-                    return node;
-                case 143:
-                    if (node.parent.kind === 142 && isClassElement(node.parent.parent)) {
-                        node = node.parent.parent;
-                    }
-                    else if (isClassElement(node.parent)) {
-                        node = node.parent;
-                    }
-                    break;
-            }
-        }
-    }
-    ts.getSuperContainer = getSuperContainer;
-    function isSuperPropertyOrElementAccess(node) {
-        return (node.kind === 172
-            || node.kind === 173)
-            && node.expression.kind === 95;
-    }
-    ts.isSuperPropertyOrElementAccess = isSuperPropertyOrElementAccess;
-    function getEntityNameFromTypeNode(node) {
-        if (node) {
-            switch (node.kind) {
-                case 155:
-                    return node.typeName;
-                case 194:
-                    return node.expression;
-                case 69:
-                case 139:
-                    return node;
-            }
-        }
-        return undefined;
-    }
-    ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
-    function getInvokedExpression(node) {
-        if (node.kind === 176) {
-            return node.tag;
-        }
-        return node.expression;
-    }
-    ts.getInvokedExpression = getInvokedExpression;
-    function nodeCanBeDecorated(node) {
-        switch (node.kind) {
-            case 221:
-                return true;
-            case 145:
-                return node.parent.kind === 221;
-            case 149:
-            case 150:
-            case 147:
-                return node.body !== undefined
-                    && node.parent.kind === 221;
-            case 142:
-                return node.parent.body !== undefined
-                    && (node.parent.kind === 148
-                        || node.parent.kind === 147
-                        || node.parent.kind === 150)
-                    && node.parent.parent.kind === 221;
-        }
-        return false;
-    }
-    ts.nodeCanBeDecorated = nodeCanBeDecorated;
-    function nodeIsDecorated(node) {
-        return node.decorators !== undefined
-            && nodeCanBeDecorated(node);
-    }
-    ts.nodeIsDecorated = nodeIsDecorated;
-    function isPropertyAccessExpression(node) {
-        return node.kind === 172;
-    }
-    ts.isPropertyAccessExpression = isPropertyAccessExpression;
-    function isElementAccessExpression(node) {
-        return node.kind === 173;
-    }
-    ts.isElementAccessExpression = isElementAccessExpression;
-    function isJSXTagName(node) {
-        var parent = node.parent;
-        if (parent.kind === 243 ||
-            parent.kind === 242 ||
-            parent.kind === 245) {
-            return parent.tagName === node;
-        }
-        return false;
-    }
-    ts.isJSXTagName = isJSXTagName;
-    function isExpression(node) {
-        switch (node.kind) {
-            case 97:
-            case 95:
-            case 93:
-            case 99:
-            case 84:
-            case 10:
-            case 170:
-            case 171:
-            case 172:
-            case 173:
-            case 174:
-            case 175:
-            case 176:
-            case 195:
-            case 177:
-            case 196:
-            case 178:
-            case 179:
-            case 192:
-            case 180:
-            case 183:
-            case 181:
-            case 182:
-            case 185:
-            case 186:
-            case 187:
-            case 188:
-            case 191:
-            case 189:
-            case 11:
-            case 193:
-            case 241:
-            case 242:
-            case 190:
-            case 184:
-                return true;
-            case 139:
-                while (node.parent.kind === 139) {
-                    node = node.parent;
-                }
-                return node.parent.kind === 158 || isJSXTagName(node);
-            case 69:
-                if (node.parent.kind === 158 || isJSXTagName(node)) {
-                    return true;
-                }
-            case 8:
-            case 9:
-            case 97:
-                var parent_2 = node.parent;
-                switch (parent_2.kind) {
-                    case 218:
-                    case 142:
-                    case 145:
-                    case 144:
-                    case 255:
-                    case 253:
-                    case 169:
-                        return parent_2.initializer === node;
-                    case 202:
-                    case 203:
-                    case 204:
-                    case 205:
-                    case 211:
-                    case 212:
-                    case 213:
-                    case 249:
-                    case 215:
-                    case 213:
-                        return parent_2.expression === node;
-                    case 206:
-                        var forStatement = parent_2;
-                        return (forStatement.initializer === node && forStatement.initializer.kind !== 219) ||
-                            forStatement.condition === node ||
-                            forStatement.incrementor === node;
-                    case 207:
-                    case 208:
-                        var forInStatement = parent_2;
-                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 219) ||
-                            forInStatement.expression === node;
-                    case 177:
-                    case 195:
-                        return node === parent_2.expression;
-                    case 197:
-                        return node === parent_2.expression;
-                    case 140:
-                        return node === parent_2.expression;
-                    case 143:
-                    case 248:
-                    case 247:
-                        return true;
-                    case 194:
-                        return parent_2.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent_2);
-                    default:
-                        if (isExpression(parent_2)) {
-                            return true;
-                        }
-                }
-        }
-        return false;
-    }
-    ts.isExpression = isExpression;
-    function isExternalModuleNameRelative(moduleName) {
-        return moduleName.substr(0, 2) === "./" || moduleName.substr(0, 3) === "../" || moduleName.substr(0, 2) === ".\\" || moduleName.substr(0, 3) === "..\\";
-    }
-    ts.isExternalModuleNameRelative = isExternalModuleNameRelative;
-    function isInstantiatedModule(node, preserveConstEnums) {
-        var moduleState = ts.getModuleInstanceState(node);
-        return moduleState === 1 ||
-            (preserveConstEnums && moduleState === 2);
-    }
-    ts.isInstantiatedModule = isInstantiatedModule;
-    function isExternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 && node.moduleReference.kind === 240;
-    }
-    ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
-    function getExternalModuleImportEqualsDeclarationExpression(node) {
-        ts.Debug.assert(isExternalModuleImportEqualsDeclaration(node));
-        return node.moduleReference.expression;
-    }
-    ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
-    function isInternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 && node.moduleReference.kind !== 240;
-    }
-    ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
-    function isSourceFileJavaScript(file) {
-        return isInJavaScriptFile(file);
-    }
-    ts.isSourceFileJavaScript = isSourceFileJavaScript;
-    function isInJavaScriptFile(node) {
-        return node && !!(node.flags & 134217728);
-    }
-    ts.isInJavaScriptFile = isInJavaScriptFile;
-    function isRequireCall(expression, checkArgumentIsStringLiteral) {
-        var isRequire = expression.kind === 174 &&
-            expression.expression.kind === 69 &&
-            expression.expression.text === "require" &&
-            expression.arguments.length === 1;
-        return isRequire && (!checkArgumentIsStringLiteral || expression.arguments[0].kind === 9);
-    }
-    ts.isRequireCall = isRequireCall;
-    function isSingleOrDoubleQuote(charCode) {
-        return charCode === 39 || charCode === 34;
-    }
-    ts.isSingleOrDoubleQuote = isSingleOrDoubleQuote;
-    function getSpecialPropertyAssignmentKind(expression) {
-        if (!isInJavaScriptFile(expression)) {
-            return 0;
-        }
-        if (expression.kind !== 187) {
-            return 0;
-        }
-        var expr = expression;
-        if (expr.operatorToken.kind !== 56 || expr.left.kind !== 172) {
-            return 0;
-        }
-        var lhs = expr.left;
-        if (lhs.expression.kind === 69) {
-            var lhsId = lhs.expression;
-            if (lhsId.text === "exports") {
-                return 1;
-            }
-            else if (lhsId.text === "module" && lhs.name.text === "exports") {
-                return 2;
-            }
-        }
-        else if (lhs.expression.kind === 97) {
-            return 4;
-        }
-        else if (lhs.expression.kind === 172) {
-            var innerPropertyAccess = lhs.expression;
-            if (innerPropertyAccess.expression.kind === 69) {
-                var innerPropertyAccessIdentifier = innerPropertyAccess.expression;
-                if (innerPropertyAccessIdentifier.text === "module" && innerPropertyAccess.name.text === "exports") {
-                    return 1;
-                }
-                if (innerPropertyAccess.name.text === "prototype") {
-                    return 3;
-                }
-            }
-        }
-        return 0;
-    }
-    ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
-    function getExternalModuleName(node) {
-        if (node.kind === 230) {
-            return node.moduleSpecifier;
-        }
-        if (node.kind === 229) {
-            var reference = node.moduleReference;
-            if (reference.kind === 240) {
-                return reference.expression;
-            }
-        }
-        if (node.kind === 236) {
-            return node.moduleSpecifier;
-        }
-        if (node.kind === 225 && node.name.kind === 9) {
-            return node.name;
-        }
-    }
-    ts.getExternalModuleName = getExternalModuleName;
-    function hasQuestionToken(node) {
-        if (node) {
-            switch (node.kind) {
-                case 142:
-                case 147:
-                case 146:
-                case 254:
-                case 253:
-                case 145:
-                case 144:
-                    return node.questionToken !== undefined;
-            }
-        }
-        return false;
-    }
-    ts.hasQuestionToken = hasQuestionToken;
-    function isJSDocConstructSignature(node) {
-        return node.kind === 269 &&
-            node.parameters.length > 0 &&
-            node.parameters[0].type.kind === 271;
-    }
-    ts.isJSDocConstructSignature = isJSDocConstructSignature;
-    function getJSDocTag(node, kind, checkParentVariableStatement) {
-        if (!node) {
-            return undefined;
-        }
-        var jsDocComment = getJSDocComment(node, checkParentVariableStatement);
-        if (!jsDocComment) {
-            return undefined;
-        }
-        for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-            var tag = _a[_i];
-            if (tag.kind === kind) {
-                return tag;
-            }
-        }
-    }
-    function getJSDocComment(node, checkParentVariableStatement) {
-        if (node.jsDocComment) {
-            return node.jsDocComment;
-        }
-        if (checkParentVariableStatement) {
-            var isInitializerOfVariableDeclarationInStatement = node.parent.kind === 218 &&
-                node.parent.initializer === node &&
-                node.parent.parent.parent.kind === 200;
-            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent : undefined;
-            if (variableStatementNode) {
-                return variableStatementNode.jsDocComment;
-            }
-            var parent_3 = node.parent;
-            var isSourceOfAssignmentExpressionStatement = parent_3 && parent_3.parent &&
-                parent_3.kind === 187 &&
-                parent_3.operatorToken.kind === 56 &&
-                parent_3.parent.kind === 202;
-            if (isSourceOfAssignmentExpressionStatement) {
-                return parent_3.parent.jsDocComment;
-            }
-            var isPropertyAssignmentExpression = parent_3 && parent_3.kind === 253;
-            if (isPropertyAssignmentExpression) {
-                return parent_3.jsDocComment;
-            }
-        }
-        return undefined;
-    }
-    function getJSDocTypeTag(node) {
-        return getJSDocTag(node, 277, false);
-    }
-    ts.getJSDocTypeTag = getJSDocTypeTag;
-    function getJSDocReturnTag(node) {
-        return getJSDocTag(node, 276, true);
-    }
-    ts.getJSDocReturnTag = getJSDocReturnTag;
-    function getJSDocTemplateTag(node) {
-        return getJSDocTag(node, 278, false);
-    }
-    ts.getJSDocTemplateTag = getJSDocTemplateTag;
-    function getCorrespondingJSDocParameterTag(parameter) {
-        if (parameter.name && parameter.name.kind === 69) {
-            var parameterName = parameter.name.text;
-            var jsDocComment = getJSDocComment(parameter.parent, true);
-            if (jsDocComment) {
-                for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-                    var tag = _a[_i];
-                    if (tag.kind === 275) {
-                        var parameterTag = tag;
-                        var name_6 = parameterTag.preParameterName || parameterTag.postParameterName;
-                        if (name_6.text === parameterName) {
-                            return parameterTag;
-                        }
-                    }
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getCorrespondingJSDocParameterTag = getCorrespondingJSDocParameterTag;
-    function hasRestParameter(s) {
-        return isRestParameter(ts.lastOrUndefined(s.parameters));
-    }
-    ts.hasRestParameter = hasRestParameter;
-    function hasDeclaredRestParameter(s) {
-        return isDeclaredRestParam(ts.lastOrUndefined(s.parameters));
-    }
-    ts.hasDeclaredRestParameter = hasDeclaredRestParameter;
-    function isRestParameter(node) {
-        if (node && (node.flags & 134217728)) {
-            if (node.type && node.type.kind === 270) {
-                return true;
-            }
-            var paramTag = getCorrespondingJSDocParameterTag(node);
-            if (paramTag && paramTag.typeExpression) {
-                return paramTag.typeExpression.type.kind === 270;
-            }
-        }
-        return isDeclaredRestParam(node);
-    }
-    ts.isRestParameter = isRestParameter;
-    function isDeclaredRestParam(node) {
-        return node && node.dotDotDotToken !== undefined;
-    }
-    ts.isDeclaredRestParam = isDeclaredRestParam;
-    function isLiteralKind(kind) {
-        return 8 <= kind && kind <= 11;
-    }
-    ts.isLiteralKind = isLiteralKind;
-    function isTextualLiteralKind(kind) {
-        return kind === 9 || kind === 11;
-    }
-    ts.isTextualLiteralKind = isTextualLiteralKind;
-    function isTemplateLiteralKind(kind) {
-        return 11 <= kind && kind <= 14;
-    }
-    ts.isTemplateLiteralKind = isTemplateLiteralKind;
-    function isBindingPattern(node) {
-        return !!node && (node.kind === 168 || node.kind === 167);
-    }
-    ts.isBindingPattern = isBindingPattern;
-    function isAssignmentTarget(node) {
-        while (node.parent.kind === 178) {
-            node = node.parent;
-        }
-        while (true) {
-            var parent_4 = node.parent;
-            if (parent_4.kind === 170 || parent_4.kind === 191) {
-                node = parent_4;
-                continue;
-            }
-            if (parent_4.kind === 253 || parent_4.kind === 254) {
-                node = parent_4.parent;
-                continue;
-            }
-            return parent_4.kind === 187 &&
-                parent_4.operatorToken.kind === 56 &&
-                parent_4.left === node ||
-                (parent_4.kind === 207 || parent_4.kind === 208) &&
-                    parent_4.initializer === node;
-        }
-    }
-    ts.isAssignmentTarget = isAssignmentTarget;
-    function isNodeDescendentOf(node, ancestor) {
-        while (node) {
-            if (node === ancestor)
-                return true;
-            node = node.parent;
-        }
-        return false;
-    }
-    ts.isNodeDescendentOf = isNodeDescendentOf;
-    function isInAmbientContext(node) {
-        while (node) {
-            if (node.flags & 2 || (node.kind === 256 && node.isDeclarationFile)) {
-                return true;
-            }
-            node = node.parent;
-        }
-        return false;
-    }
-    ts.isInAmbientContext = isInAmbientContext;
-    function isDeclaration(node) {
-        switch (node.kind) {
-            case 180:
-            case 169:
-            case 221:
-            case 192:
-            case 148:
-            case 224:
-            case 255:
-            case 238:
-            case 220:
-            case 179:
-            case 149:
-            case 231:
-            case 229:
-            case 234:
-            case 222:
-            case 147:
-            case 146:
-            case 225:
-            case 232:
-            case 142:
-            case 253:
-            case 145:
-            case 144:
-            case 150:
-            case 254:
-            case 223:
-            case 141:
-            case 218:
-                return true;
-        }
-        return false;
-    }
-    ts.isDeclaration = isDeclaration;
-    function isStatement(n) {
-        switch (n.kind) {
-            case 210:
-            case 209:
-            case 217:
-            case 204:
-            case 202:
-            case 201:
-            case 207:
-            case 208:
-            case 206:
-            case 203:
-            case 214:
-            case 211:
-            case 213:
-            case 215:
-            case 216:
-            case 200:
-            case 205:
-            case 212:
-            case 235:
-                return true;
-            default:
-                return false;
-        }
-    }
-    ts.isStatement = isStatement;
-    function isClassElement(n) {
-        switch (n.kind) {
-            case 148:
-            case 145:
-            case 147:
-            case 149:
-            case 150:
-            case 146:
-            case 153:
-                return true;
-            default:
-                return false;
-        }
-    }
-    ts.isClassElement = isClassElement;
-    function isDeclarationName(name) {
-        if (name.kind !== 69 && name.kind !== 9 && name.kind !== 8) {
-            return false;
-        }
-        var parent = name.parent;
-        if (parent.kind === 234 || parent.kind === 238) {
-            if (parent.propertyName) {
-                return true;
-            }
-        }
-        if (isDeclaration(parent)) {
-            return parent.name === name;
-        }
-        return false;
-    }
-    ts.isDeclarationName = isDeclarationName;
-    function isLiteralComputedPropertyDeclarationName(node) {
-        return (node.kind === 9 || node.kind === 8) &&
-            node.parent.kind === 140 &&
-            isDeclaration(node.parent.parent);
-    }
-    ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
-    function isIdentifierName(node) {
-        var parent = node.parent;
-        switch (parent.kind) {
-            case 145:
-            case 144:
-            case 147:
-            case 146:
-            case 149:
-            case 150:
-            case 255:
-            case 253:
-            case 172:
-                return parent.name === node;
-            case 139:
-                if (parent.right === node) {
-                    while (parent.kind === 139) {
-                        parent = parent.parent;
-                    }
-                    return parent.kind === 158;
-                }
-                return false;
-            case 169:
-            case 234:
-                return parent.propertyName === node;
-            case 238:
-                return true;
-        }
-        return false;
-    }
-    ts.isIdentifierName = isIdentifierName;
-    function isAliasSymbolDeclaration(node) {
-        return node.kind === 229 ||
-            node.kind === 228 ||
-            node.kind === 231 && !!node.name ||
-            node.kind === 232 ||
-            node.kind === 234 ||
-            node.kind === 238 ||
-            node.kind === 235 && node.expression.kind === 69;
-    }
-    ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
-    function getClassExtendsHeritageClauseElement(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83);
-        return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
-    }
-    ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
-    function getClassImplementsHeritageClauseElements(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 106);
-        return heritageClause ? heritageClause.types : undefined;
-    }
-    ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
-    function getInterfaceBaseTypeNodes(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83);
-        return heritageClause ? heritageClause.types : undefined;
-    }
-    ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
-    function getHeritageClause(clauses, kind) {
-        if (clauses) {
-            for (var _i = 0, clauses_1 = clauses; _i < clauses_1.length; _i++) {
-                var clause = clauses_1[_i];
-                if (clause.token === kind) {
-                    return clause;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getHeritageClause = getHeritageClause;
-    function tryResolveScriptReference(host, sourceFile, reference) {
-        if (!host.getCompilerOptions().noResolve) {
-            var referenceFileName = ts.isRootedDiskPath(reference.fileName) ? reference.fileName : ts.combinePaths(ts.getDirectoryPath(sourceFile.fileName), reference.fileName);
-            return host.getSourceFile(referenceFileName);
-        }
-    }
-    ts.tryResolveScriptReference = tryResolveScriptReference;
-    function getAncestor(node, kind) {
-        while (node) {
-            if (node.kind === kind) {
-                return node;
-            }
-            node = node.parent;
-        }
-        return undefined;
-    }
-    ts.getAncestor = getAncestor;
-    function getFileReferenceFromReferencePath(comment, commentRange) {
-        var simpleReferenceRegEx = /^\/\/\/\s*<reference\s+/gim;
-        var isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
-        if (simpleReferenceRegEx.test(comment)) {
-            if (isNoDefaultLibRegEx.test(comment)) {
-                return {
-                    isNoDefaultLib: true
-                };
-            }
-            else {
-                var refMatchResult = ts.fullTripleSlashReferencePathRegEx.exec(comment);
-                var refLibResult = !refMatchResult && ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx.exec(comment);
-                if (refMatchResult || refLibResult) {
-                    var start = commentRange.pos;
-                    var end = commentRange.end;
-                    return {
-                        fileReference: {
-                            pos: start,
-                            end: end,
-                            fileName: (refMatchResult || refLibResult)[3]
-                        },
-                        isNoDefaultLib: false,
-                        isTypeReferenceDirective: !!refLibResult
-                    };
-                }
-                return {
-                    diagnosticMessage: ts.Diagnostics.Invalid_reference_directive_syntax,
-                    isNoDefaultLib: false
-                };
-            }
-        }
-        return undefined;
-    }
-    ts.getFileReferenceFromReferencePath = getFileReferenceFromReferencePath;
-    function isKeyword(token) {
-        return 70 <= token && token <= 138;
-    }
-    ts.isKeyword = isKeyword;
-    function isTrivia(token) {
-        return 2 <= token && token <= 7;
-    }
-    ts.isTrivia = isTrivia;
-    function isAsyncFunctionLike(node) {
-        return isFunctionLike(node) && (node.flags & 256) !== 0 && !isAccessor(node);
-    }
-    ts.isAsyncFunctionLike = isAsyncFunctionLike;
-    function isStringOrNumericLiteral(kind) {
-        return kind === 9 || kind === 8;
-    }
-    ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
-    function hasDynamicName(declaration) {
-        return declaration.name && isDynamicName(declaration.name);
-    }
-    ts.hasDynamicName = hasDynamicName;
-    function isDynamicName(name) {
-        return name.kind === 140 &&
-            !isStringOrNumericLiteral(name.expression.kind) &&
-            !isWellKnownSymbolSyntactically(name.expression);
-    }
-    ts.isDynamicName = isDynamicName;
-    function isWellKnownSymbolSyntactically(node) {
-        return isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
-    }
-    ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
-    function getPropertyNameForPropertyNameNode(name) {
-        if (name.kind === 69 || name.kind === 9 || name.kind === 8 || name.kind === 142) {
-            return name.text;
-        }
-        if (name.kind === 140) {
-            var nameExpression = name.expression;
-            if (isWellKnownSymbolSyntactically(nameExpression)) {
-                var rightHandSideName = nameExpression.name.text;
-                return getPropertyNameForKnownSymbolName(rightHandSideName);
-            }
-            else if (nameExpression.kind === 9 || nameExpression.kind === 8) {
-                return nameExpression.text;
-            }
-        }
-        return undefined;
-    }
-    ts.getPropertyNameForPropertyNameNode = getPropertyNameForPropertyNameNode;
-    function getPropertyNameForKnownSymbolName(symbolName) {
-        return "__@" + symbolName;
-    }
-    ts.getPropertyNameForKnownSymbolName = getPropertyNameForKnownSymbolName;
-    function isESSymbolIdentifier(node) {
-        return node.kind === 69 && node.text === "Symbol";
-    }
-    ts.isESSymbolIdentifier = isESSymbolIdentifier;
-    function isModifierKind(token) {
-        switch (token) {
-            case 115:
-            case 118:
-            case 74:
-            case 122:
-            case 77:
-            case 82:
-            case 112:
-            case 110:
-            case 111:
-            case 128:
-            case 113:
-                return true;
-        }
-        return false;
-    }
-    ts.isModifierKind = isModifierKind;
-    function isParameterDeclaration(node) {
-        var root = getRootDeclaration(node);
-        return root.kind === 142;
-    }
-    ts.isParameterDeclaration = isParameterDeclaration;
-    function getRootDeclaration(node) {
-        while (node.kind === 169) {
-            node = node.parent.parent;
-        }
-        return node;
-    }
-    ts.getRootDeclaration = getRootDeclaration;
-    function nodeStartsNewLexicalEnvironment(n) {
-        return isFunctionLike(n) || n.kind === 225 || n.kind === 256;
-    }
-    ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
-    function cloneNode(node, location, flags, parent) {
-        var clone = location !== undefined
-            ? ts.createNode(node.kind, location.pos, location.end)
-            : createSynthesizedNode(node.kind);
-        for (var key in node) {
-            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
-                continue;
-            }
-            clone[key] = node[key];
-        }
-        if (flags !== undefined) {
-            clone.flags = flags;
-        }
-        if (parent !== undefined) {
-            clone.parent = parent;
-        }
-        return clone;
-    }
-    ts.cloneNode = cloneNode;
-    function cloneEntityName(node, parent) {
-        var clone = cloneNode(node, node, node.flags, parent);
-        if (isQualifiedName(clone)) {
-            var left = clone.left, right = clone.right;
-            clone.left = cloneEntityName(left, clone);
-            clone.right = cloneNode(right, right, right.flags, parent);
-        }
-        return clone;
-    }
-    ts.cloneEntityName = cloneEntityName;
-    function isQualifiedName(node) {
-        return node.kind === 139;
-    }
-    ts.isQualifiedName = isQualifiedName;
-    function nodeIsSynthesized(node) {
-        return node.pos === -1;
-    }
-    ts.nodeIsSynthesized = nodeIsSynthesized;
-    function createSynthesizedNode(kind, startsOnNewLine) {
-        var node = ts.createNode(kind, -1, -1);
-        node.startsOnNewLine = startsOnNewLine;
-        return node;
-    }
-    ts.createSynthesizedNode = createSynthesizedNode;
-    function createSynthesizedNodeArray() {
-        var array = [];
-        array.pos = -1;
-        array.end = -1;
-        return array;
-    }
-    ts.createSynthesizedNodeArray = createSynthesizedNodeArray;
-    function createDiagnosticCollection() {
-        var nonFileDiagnostics = [];
-        var fileDiagnostics = {};
-        var diagnosticsModified = false;
-        var modificationCount = 0;
-        return {
-            add: add,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getDiagnostics: getDiagnostics,
-            getModificationCount: getModificationCount,
-            reattachFileDiagnostics: reattachFileDiagnostics
-        };
-        function getModificationCount() {
-            return modificationCount;
-        }
-        function reattachFileDiagnostics(newFile) {
-            if (!ts.hasProperty(fileDiagnostics, newFile.fileName)) {
-                return;
-            }
-            for (var _i = 0, _a = fileDiagnostics[newFile.fileName]; _i < _a.length; _i++) {
-                var diagnostic = _a[_i];
-                diagnostic.file = newFile;
-            }
-        }
-        function add(diagnostic) {
-            var diagnostics;
-            if (diagnostic.file) {
-                diagnostics = fileDiagnostics[diagnostic.file.fileName];
-                if (!diagnostics) {
-                    diagnostics = [];
-                    fileDiagnostics[diagnostic.file.fileName] = diagnostics;
-                }
-            }
-            else {
-                diagnostics = nonFileDiagnostics;
-            }
-            diagnostics.push(diagnostic);
-            diagnosticsModified = true;
-            modificationCount++;
-        }
-        function getGlobalDiagnostics() {
-            sortAndDeduplicate();
-            return nonFileDiagnostics;
-        }
-        function getDiagnostics(fileName) {
-            sortAndDeduplicate();
-            if (fileName) {
-                return fileDiagnostics[fileName] || [];
-            }
-            var allDiagnostics = [];
-            function pushDiagnostic(d) {
-                allDiagnostics.push(d);
-            }
-            ts.forEach(nonFileDiagnostics, pushDiagnostic);
-            for (var key in fileDiagnostics) {
-                if (ts.hasProperty(fileDiagnostics, key)) {
-                    ts.forEach(fileDiagnostics[key], pushDiagnostic);
-                }
-            }
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function sortAndDeduplicate() {
-            if (!diagnosticsModified) {
-                return;
-            }
-            diagnosticsModified = false;
-            nonFileDiagnostics = ts.sortAndDeduplicateDiagnostics(nonFileDiagnostics);
-            for (var key in fileDiagnostics) {
-                if (ts.hasProperty(fileDiagnostics, key)) {
-                    fileDiagnostics[key] = ts.sortAndDeduplicateDiagnostics(fileDiagnostics[key]);
-                }
-            }
-        }
-    }
-    ts.createDiagnosticCollection = createDiagnosticCollection;
-    var escapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
-    var escapedCharsMap = {
-        "\0": "\\0",
-        "\t": "\\t",
-        "\v": "\\v",
-        "\f": "\\f",
-        "\b": "\\b",
-        "\r": "\\r",
-        "\n": "\\n",
-        "\\": "\\\\",
-        "\"": "\\\"",
-        "\u2028": "\\u2028",
-        "\u2029": "\\u2029",
-        "\u0085": "\\u0085"
-    };
-    function escapeString(s) {
-        s = escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, getReplacement) : s;
-        return s;
-        function getReplacement(c) {
-            return escapedCharsMap[c] || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
-        }
-    }
-    ts.escapeString = escapeString;
-    function isIntrinsicJsxName(name) {
-        var ch = name.substr(0, 1);
-        return ch.toLowerCase() === ch;
-    }
-    ts.isIntrinsicJsxName = isIntrinsicJsxName;
-    function get16BitUnicodeEscapeSequence(charCode) {
-        var hexCharCode = charCode.toString(16).toUpperCase();
-        var paddedHexCode = ("0000" + hexCharCode).slice(-4);
-        return "\\u" + paddedHexCode;
-    }
-    var nonAsciiCharacters = /[^\u0000-\u007F]/g;
-    function escapeNonAsciiCharacters(s) {
-        return nonAsciiCharacters.test(s) ?
-            s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
-            s;
-    }
-    ts.escapeNonAsciiCharacters = escapeNonAsciiCharacters;
-    var indentStrings = ["", "    "];
-    function getIndentString(level) {
-        if (indentStrings[level] === undefined) {
-            indentStrings[level] = getIndentString(level - 1) + indentStrings[1];
-        }
-        return indentStrings[level];
-    }
-    ts.getIndentString = getIndentString;
-    function getIndentSize() {
-        return indentStrings[1].length;
-    }
-    ts.getIndentSize = getIndentSize;
-    function createTextWriter(newLine) {
-        var output;
-        var indent;
-        var lineStart;
-        var lineCount;
-        var linePos;
-        function write(s) {
-            if (s && s.length) {
-                if (lineStart) {
-                    output += getIndentString(indent);
-                    lineStart = false;
-                }
-                output += s;
-            }
-        }
-        function reset() {
-            output = "";
-            indent = 0;
-            lineStart = true;
-            lineCount = 0;
-            linePos = 0;
-        }
-        function rawWrite(s) {
-            if (s !== undefined) {
-                if (lineStart) {
-                    lineStart = false;
-                }
-                output += s;
-            }
-        }
-        function writeLiteral(s) {
-            if (s && s.length) {
-                write(s);
-                var lineStartsOfS = ts.computeLineStarts(s);
-                if (lineStartsOfS.length > 1) {
-                    lineCount = lineCount + lineStartsOfS.length - 1;
-                    linePos = output.length - s.length + ts.lastOrUndefined(lineStartsOfS);
-                }
-            }
-        }
-        function writeLine() {
-            if (!lineStart) {
-                output += newLine;
-                lineCount++;
-                linePos = output.length;
-                lineStart = true;
-            }
-        }
-        function writeTextOfNode(text, node) {
-            write(getTextOfNodeFromSourceText(text, node));
-        }
-        reset();
-        return {
-            write: write,
-            rawWrite: rawWrite,
-            writeTextOfNode: writeTextOfNode,
-            writeLiteral: writeLiteral,
-            writeLine: writeLine,
-            increaseIndent: function () { indent++; },
-            decreaseIndent: function () { indent--; },
-            getIndent: function () { return indent; },
-            getTextPos: function () { return output.length; },
-            getLine: function () { return lineCount + 1; },
-            getColumn: function () { return lineStart ? indent * getIndentSize() + 1 : output.length - linePos + 1; },
-            getText: function () { return output; },
-            reset: reset
-        };
-    }
-    ts.createTextWriter = createTextWriter;
-    function getExternalModuleNameFromPath(host, fileName) {
-        var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
-        var dir = ts.toPath(host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
-        var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
-        var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, false);
-        return ts.removeFileExtension(relativePath);
-    }
-    ts.getExternalModuleNameFromPath = getExternalModuleNameFromPath;
-    function getOwnEmitOutputFilePath(sourceFile, host, extension) {
-        var compilerOptions = host.getCompilerOptions();
-        var emitOutputFilePathWithoutExtension;
-        if (compilerOptions.outDir) {
-            emitOutputFilePathWithoutExtension = ts.removeFileExtension(getSourceFilePathInNewDir(sourceFile, host, compilerOptions.outDir));
-        }
-        else {
-            emitOutputFilePathWithoutExtension = ts.removeFileExtension(sourceFile.fileName);
-        }
-        return emitOutputFilePathWithoutExtension + extension;
-    }
-    ts.getOwnEmitOutputFilePath = getOwnEmitOutputFilePath;
-    function getDeclarationEmitOutputFilePath(sourceFile, host) {
-        var options = host.getCompilerOptions();
-        var outputDir = options.declarationDir || options.outDir;
-        if (options.declaration) {
-            var path = outputDir
-                ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
-                : sourceFile.fileName;
-            return ts.removeFileExtension(path) + ".d.ts";
-        }
-    }
-    ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
-    function getEmitScriptTarget(compilerOptions) {
-        return compilerOptions.target || 0;
-    }
-    ts.getEmitScriptTarget = getEmitScriptTarget;
-    function getEmitModuleKind(compilerOptions) {
-        return typeof compilerOptions.module === "number" ?
-            compilerOptions.module :
-            getEmitScriptTarget(compilerOptions) === 2 ? ts.ModuleKind.ES6 : ts.ModuleKind.CommonJS;
-    }
-    ts.getEmitModuleKind = getEmitModuleKind;
-    function forEachExpectedEmitFile(host, action, targetSourceFile) {
-        var options = host.getCompilerOptions();
-        if (options.outFile || options.out) {
-            onBundledEmit(host);
-        }
-        else {
-            var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
-            for (var _i = 0, sourceFiles_1 = sourceFiles; _i < sourceFiles_1.length; _i++) {
-                var sourceFile = sourceFiles_1[_i];
-                if (!isDeclarationFile(sourceFile)) {
-                    onSingleFileEmit(host, sourceFile);
-                }
-            }
-        }
-        function onSingleFileEmit(host, sourceFile) {
-            var extension = ".js";
-            if (options.jsx === 1) {
-                if (isSourceFileJavaScript(sourceFile)) {
-                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
-                        extension = ".jsx";
-                    }
-                }
-                else if (sourceFile.languageVariant === 1) {
-                    extension = ".jsx";
-                }
-            }
-            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
-            var emitFileNames = {
-                jsFilePath: jsFilePath,
-                sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                declarationFilePath: !isSourceFileJavaScript(sourceFile) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined
-            };
-            action(emitFileNames, [sourceFile], false);
-        }
-        function onBundledEmit(host) {
-            var bundledSources = ts.filter(host.getSourceFiles(), function (sourceFile) {
-                return !isDeclarationFile(sourceFile)
-                    && (!ts.isExternalModule(sourceFile) || !!getEmitModuleKind(options));
-            });
-            if (bundledSources.length) {
-                var jsFilePath = options.outFile || options.out;
-                var emitFileNames = {
-                    jsFilePath: jsFilePath,
-                    sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                    declarationFilePath: options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined
-                };
-                action(emitFileNames, bundledSources, true);
-            }
-        }
-        function getSourceMapFilePath(jsFilePath, options) {
-            return options.sourceMap ? jsFilePath + ".map" : undefined;
-        }
-    }
-    ts.forEachExpectedEmitFile = forEachExpectedEmitFile;
-    function getSourceFilePathInNewDir(sourceFile, host, newDirPath) {
-        var sourceFilePath = ts.getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
-        sourceFilePath = sourceFilePath.replace(host.getCommonSourceDirectory(), "");
-        return ts.combinePaths(newDirPath, sourceFilePath);
-    }
-    ts.getSourceFilePathInNewDir = getSourceFilePathInNewDir;
-    function writeFile(host, diagnostics, fileName, data, writeByteOrderMark, sourceFiles) {
-        host.writeFile(fileName, data, writeByteOrderMark, function (hostErrorMessage) {
-            diagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Could_not_write_file_0_Colon_1, fileName, hostErrorMessage));
-        }, sourceFiles);
-    }
-    ts.writeFile = writeFile;
-    function getLineOfLocalPosition(currentSourceFile, pos) {
-        return ts.getLineAndCharacterOfPosition(currentSourceFile, pos).line;
-    }
-    ts.getLineOfLocalPosition = getLineOfLocalPosition;
-    function getLineOfLocalPositionFromLineMap(lineMap, pos) {
-        return ts.computeLineAndCharacterOfPosition(lineMap, pos).line;
-    }
-    ts.getLineOfLocalPositionFromLineMap = getLineOfLocalPositionFromLineMap;
-    function getFirstConstructorWithBody(node) {
-        return ts.forEach(node.members, function (member) {
-            if (member.kind === 148 && nodeIsPresent(member.body)) {
-                return member;
-            }
-        });
-    }
-    ts.getFirstConstructorWithBody = getFirstConstructorWithBody;
-    function getSetAccessorTypeAnnotationNode(accessor) {
-        if (accessor && accessor.parameters.length > 0) {
-            var hasThis = accessor.parameters.length === 2 &&
-                accessor.parameters[0].name.kind === 69 &&
-                accessor.parameters[0].name.originalKeywordKind === 97;
-            return accessor.parameters[hasThis ? 1 : 0].type;
-        }
-    }
-    ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
-    function getAllAccessorDeclarations(declarations, accessor) {
-        var firstAccessor;
-        var secondAccessor;
-        var getAccessor;
-        var setAccessor;
-        if (hasDynamicName(accessor)) {
-            firstAccessor = accessor;
-            if (accessor.kind === 149) {
-                getAccessor = accessor;
-            }
-            else if (accessor.kind === 150) {
-                setAccessor = accessor;
-            }
-            else {
-                ts.Debug.fail("Accessor has wrong kind");
-            }
-        }
-        else {
-            ts.forEach(declarations, function (member) {
-                if ((member.kind === 149 || member.kind === 150)
-                    && (member.flags & 32) === (accessor.flags & 32)) {
-                    var memberName = getPropertyNameForPropertyNameNode(member.name);
-                    var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
-                    if (memberName === accessorName) {
-                        if (!firstAccessor) {
-                            firstAccessor = member;
-                        }
-                        else if (!secondAccessor) {
-                            secondAccessor = member;
-                        }
-                        if (member.kind === 149 && !getAccessor) {
-                            getAccessor = member;
-                        }
-                        if (member.kind === 150 && !setAccessor) {
-                            setAccessor = member;
-                        }
-                    }
-                }
-            });
-        }
-        return {
-            firstAccessor: firstAccessor,
-            secondAccessor: secondAccessor,
-            getAccessor: getAccessor,
-            setAccessor: setAccessor
-        };
-    }
-    ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
-    function emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments) {
-        if (leadingComments && leadingComments.length && node.pos !== leadingComments[0].pos &&
-            getLineOfLocalPositionFromLineMap(lineMap, node.pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
-            writer.writeLine();
-        }
-    }
-    ts.emitNewLineBeforeLeadingComments = emitNewLineBeforeLeadingComments;
-    function emitComments(text, lineMap, writer, comments, trailingSeparator, newLine, writeComment) {
-        var emitLeadingSpace = !trailingSeparator;
-        ts.forEach(comments, function (comment) {
-            if (emitLeadingSpace) {
-                writer.write(" ");
-                emitLeadingSpace = false;
-            }
-            writeComment(text, lineMap, writer, comment, newLine);
-            if (comment.hasTrailingNewLine) {
-                writer.writeLine();
-            }
-            else if (trailingSeparator) {
-                writer.write(" ");
-            }
-            else {
-                emitLeadingSpace = true;
-            }
-        });
-    }
-    ts.emitComments = emitComments;
-    function emitDetachedComments(text, lineMap, writer, writeComment, node, newLine, removeComments) {
-        var leadingComments;
-        var currentDetachedCommentInfo;
-        if (removeComments) {
-            if (node.pos === 0) {
-                leadingComments = ts.filter(ts.getLeadingCommentRanges(text, node.pos), isPinnedComment);
-            }
-        }
-        else {
-            leadingComments = ts.getLeadingCommentRanges(text, node.pos);
-        }
-        if (leadingComments) {
-            var detachedComments = [];
-            var lastComment = void 0;
-            for (var _i = 0, leadingComments_1 = leadingComments; _i < leadingComments_1.length; _i++) {
-                var comment = leadingComments_1[_i];
-                if (lastComment) {
-                    var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, lastComment.end);
-                    var commentLine = getLineOfLocalPositionFromLineMap(lineMap, comment.pos);
-                    if (commentLine >= lastCommentLine + 2) {
-                        break;
-                    }
-                }
-                detachedComments.push(comment);
-                lastComment = comment;
-            }
-            if (detachedComments.length) {
-                var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, ts.lastOrUndefined(detachedComments).end);
-                var nodeLine = getLineOfLocalPositionFromLineMap(lineMap, ts.skipTrivia(text, node.pos));
-                if (nodeLine >= lastCommentLine + 2) {
-                    emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments);
-                    emitComments(text, lineMap, writer, detachedComments, true, newLine, writeComment);
-                    currentDetachedCommentInfo = { nodePos: node.pos, detachedCommentEndPos: ts.lastOrUndefined(detachedComments).end };
-                }
-            }
-        }
-        return currentDetachedCommentInfo;
-        function isPinnedComment(comment) {
-            return text.charCodeAt(comment.pos + 1) === 42 &&
-                text.charCodeAt(comment.pos + 2) === 33;
-        }
-    }
-    ts.emitDetachedComments = emitDetachedComments;
-    function writeCommentRange(text, lineMap, writer, comment, newLine) {
-        if (text.charCodeAt(comment.pos + 1) === 42) {
-            var firstCommentLineAndCharacter = ts.computeLineAndCharacterOfPosition(lineMap, comment.pos);
-            var lineCount = lineMap.length;
-            var firstCommentLineIndent = void 0;
-            for (var pos = comment.pos, currentLine = firstCommentLineAndCharacter.line; pos < comment.end; currentLine++) {
-                var nextLineStart = (currentLine + 1) === lineCount
-                    ? text.length + 1
-                    : lineMap[currentLine + 1];
-                if (pos !== comment.pos) {
-                    if (firstCommentLineIndent === undefined) {
-                        firstCommentLineIndent = calculateIndent(text, lineMap[firstCommentLineAndCharacter.line], comment.pos);
-                    }
-                    var currentWriterIndentSpacing = writer.getIndent() * getIndentSize();
-                    var spacesToEmit = currentWriterIndentSpacing - firstCommentLineIndent + calculateIndent(text, pos, nextLineStart);
-                    if (spacesToEmit > 0) {
-                        var numberOfSingleSpacesToEmit = spacesToEmit % getIndentSize();
-                        var indentSizeSpaceString = getIndentString((spacesToEmit - numberOfSingleSpacesToEmit) / getIndentSize());
-                        writer.rawWrite(indentSizeSpaceString);
-                        while (numberOfSingleSpacesToEmit) {
-                            writer.rawWrite(" ");
-                            numberOfSingleSpacesToEmit--;
-                        }
-                    }
-                    else {
-                        writer.rawWrite("");
-                    }
-                }
-                writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart);
-                pos = nextLineStart;
-            }
-        }
-        else {
-            writer.write(text.substring(comment.pos, comment.end));
-        }
-    }
-    ts.writeCommentRange = writeCommentRange;
-    function writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart) {
-        var end = Math.min(comment.end, nextLineStart - 1);
-        var currentLineText = text.substring(pos, end).replace(/^\s+|\s+$/g, "");
-        if (currentLineText) {
-            writer.write(currentLineText);
-            if (end !== comment.end) {
-                writer.writeLine();
-            }
-        }
-        else {
-            writer.writeLiteral(newLine);
-        }
-    }
-    function calculateIndent(text, pos, end) {
-        var currentLineIndent = 0;
-        for (; pos < end && ts.isWhiteSpace(text.charCodeAt(pos)); pos++) {
-            if (text.charCodeAt(pos) === 9) {
-                currentLineIndent += getIndentSize() - (currentLineIndent % getIndentSize());
-            }
-            else {
-                currentLineIndent++;
-            }
-        }
-        return currentLineIndent;
-    }
-    function modifierToFlag(token) {
-        switch (token) {
-            case 113: return 32;
-            case 112: return 4;
-            case 111: return 16;
-            case 110: return 8;
-            case 115: return 128;
-            case 82: return 1;
-            case 122: return 2;
-            case 74: return 2048;
-            case 77: return 512;
-            case 118: return 256;
-            case 128: return 64;
-        }
-        return 0;
-    }
-    ts.modifierToFlag = modifierToFlag;
-    function isLeftHandSideExpression(expr) {
-        if (expr) {
-            switch (expr.kind) {
-                case 172:
-                case 173:
-                case 175:
-                case 174:
-                case 196:
-                case 241:
-                case 242:
-                case 176:
-                case 170:
-                case 178:
-                case 171:
-                case 192:
-                case 179:
-                case 69:
-                case 10:
-                case 8:
-                case 9:
-                case 11:
-                case 189:
-                case 84:
-                case 93:
-                case 97:
-                case 99:
-                case 95:
-                    return true;
-            }
-        }
-        return false;
-    }
-    ts.isLeftHandSideExpression = isLeftHandSideExpression;
-    function isAssignmentOperator(token) {
-        return token >= 56 && token <= 68;
-    }
-    ts.isAssignmentOperator = isAssignmentOperator;
-    function isExpressionWithTypeArgumentsInClassExtendsClause(node) {
-        return node.kind === 194 &&
-            node.parent.token === 83 &&
-            isClassLike(node.parent.parent);
-    }
-    ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
-    function isSupportedExpressionWithTypeArguments(node) {
-        return isSupportedExpressionWithTypeArgumentsRest(node.expression);
-    }
-    ts.isSupportedExpressionWithTypeArguments = isSupportedExpressionWithTypeArguments;
-    function isSupportedExpressionWithTypeArgumentsRest(node) {
-        if (node.kind === 69) {
-            return true;
-        }
-        else if (isPropertyAccessExpression(node)) {
-            return isSupportedExpressionWithTypeArgumentsRest(node.expression);
-        }
-        else {
-            return false;
-        }
-    }
-    function isRightSideOfQualifiedNameOrPropertyAccess(node) {
-        return (node.parent.kind === 139 && node.parent.right === node) ||
-            (node.parent.kind === 172 && node.parent.name === node);
-    }
-    ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
-    function isEmptyObjectLiteralOrArrayLiteral(expression) {
-        var kind = expression.kind;
-        if (kind === 171) {
-            return expression.properties.length === 0;
-        }
-        if (kind === 170) {
-            return expression.elements.length === 0;
-        }
-        return false;
-    }
-    ts.isEmptyObjectLiteralOrArrayLiteral = isEmptyObjectLiteralOrArrayLiteral;
-    function getLocalSymbolForExportDefault(symbol) {
-        return symbol && symbol.valueDeclaration && (symbol.valueDeclaration.flags & 512) ? symbol.valueDeclaration.localSymbol : undefined;
-    }
-    ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
-    function hasJavaScriptFileExtension(fileName) {
-        return ts.forEach(ts.supportedJavascriptExtensions, function (extension) { return ts.fileExtensionIs(fileName, extension); });
-    }
-    ts.hasJavaScriptFileExtension = hasJavaScriptFileExtension;
-    function getExpandedCharCodes(input) {
-        var output = [];
-        var length = input.length;
-        for (var i = 0; i < length; i++) {
-            var charCode = input.charCodeAt(i);
-            if (charCode < 0x80) {
-                output.push(charCode);
-            }
-            else if (charCode < 0x800) {
-                output.push((charCode >> 6) | 192);
-                output.push((charCode & 63) | 128);
-            }
-            else if (charCode < 0x10000) {
-                output.push((charCode >> 12) | 224);
-                output.push(((charCode >> 6) & 63) | 128);
-                output.push((charCode & 63) | 128);
-            }
-            else if (charCode < 0x20000) {
-                output.push((charCode >> 18) | 240);
-                output.push(((charCode >> 12) & 63) | 128);
-                output.push(((charCode >> 6) & 63) | 128);
-                output.push((charCode & 63) | 128);
-            }
-            else {
-                ts.Debug.assert(false, "Unexpected code point");
-            }
-        }
-        return output;
-    }
-    ts.stringify = typeof JSON !== "undefined" && JSON.stringify
-        ? JSON.stringify
-        : stringifyFallback;
-    function stringifyFallback(value) {
-        return value === undefined ? undefined : stringifyValue(value);
-    }
-    function stringifyValue(value) {
-        return typeof value === "string" ? "\"" + escapeString(value) + "\""
-            : typeof value === "number" ? isFinite(value) ? String(value) : "null"
-                : typeof value === "boolean" ? value ? "true" : "false"
-                    : typeof value === "object" && value ? ts.isArray(value) ? cycleCheck(stringifyArray, value) : cycleCheck(stringifyObject, value)
-                        : "null";
-    }
-    function cycleCheck(cb, value) {
-        ts.Debug.assert(!value.hasOwnProperty("__cycle"), "Converting circular structure to JSON");
-        value.__cycle = true;
-        var result = cb(value);
-        delete value.__cycle;
-        return result;
-    }
-    function stringifyArray(value) {
-        return "[" + ts.reduceLeft(value, stringifyElement, "") + "]";
-    }
-    function stringifyElement(memo, value) {
-        return (memo ? memo + "," : memo) + stringifyValue(value);
-    }
-    function stringifyObject(value) {
-        return "{" + ts.reduceProperties(value, stringifyProperty, "") + "}";
-    }
-    function stringifyProperty(memo, value, key) {
-        return value === undefined || typeof value === "function" || key === "__cycle" ? memo
-            : (memo ? memo + "," : memo) + ("\"" + escapeString(key) + "\":" + stringifyValue(value));
-    }
-    var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
-    function convertToBase64(input) {
-        var result = "";
-        var charCodes = getExpandedCharCodes(input);
-        var i = 0;
-        var length = charCodes.length;
-        var byte1, byte2, byte3, byte4;
-        while (i < length) {
-            byte1 = charCodes[i] >> 2;
-            byte2 = (charCodes[i] & 3) << 4 | charCodes[i + 1] >> 4;
-            byte3 = (charCodes[i + 1] & 15) << 2 | charCodes[i + 2] >> 6;
-            byte4 = charCodes[i + 2] & 63;
-            if (i + 1 >= length) {
-                byte3 = byte4 = 64;
-            }
-            else if (i + 2 >= length) {
-                byte4 = 64;
-            }
-            result += base64Digits.charAt(byte1) + base64Digits.charAt(byte2) + base64Digits.charAt(byte3) + base64Digits.charAt(byte4);
-            i += 3;
-        }
-        return result;
-    }
-    ts.convertToBase64 = convertToBase64;
-    function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
-        return !ts.isRootedDiskPath(absoluteOrRelativePath)
-            ? absoluteOrRelativePath
-            : ts.getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, false);
-    }
-    ts.convertToRelativePath = convertToRelativePath;
-    var carriageReturnLineFeed = "\r\n";
-    var lineFeed = "\n";
-    function getNewLineCharacter(options) {
-        if (options.newLine === 0) {
-            return carriageReturnLineFeed;
-        }
-        else if (options.newLine === 1) {
-            return lineFeed;
-        }
-        else if (ts.sys) {
-            return ts.sys.newLine;
-        }
-        return carriageReturnLineFeed;
-    }
-    ts.getNewLineCharacter = getNewLineCharacter;
-    function isWatchSet(options) {
-        return options.watch && options.hasOwnProperty("watch");
-    }
-    ts.isWatchSet = isWatchSet;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getDefaultLibFileName(options) {
-        return options.target === 2 ? "lib.es6.d.ts" : "lib.d.ts";
-    }
-    ts.getDefaultLibFileName = getDefaultLibFileName;
-    function textSpanEnd(span) {
-        return span.start + span.length;
-    }
-    ts.textSpanEnd = textSpanEnd;
-    function textSpanIsEmpty(span) {
-        return span.length === 0;
-    }
-    ts.textSpanIsEmpty = textSpanIsEmpty;
-    function textSpanContainsPosition(span, position) {
-        return position >= span.start && position < textSpanEnd(span);
-    }
-    ts.textSpanContainsPosition = textSpanContainsPosition;
-    function textSpanContainsTextSpan(span, other) {
-        return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
-    }
-    ts.textSpanContainsTextSpan = textSpanContainsTextSpan;
-    function textSpanOverlapsWith(span, other) {
-        var overlapStart = Math.max(span.start, other.start);
-        var overlapEnd = Math.min(textSpanEnd(span), textSpanEnd(other));
-        return overlapStart < overlapEnd;
-    }
-    ts.textSpanOverlapsWith = textSpanOverlapsWith;
-    function textSpanOverlap(span1, span2) {
-        var overlapStart = Math.max(span1.start, span2.start);
-        var overlapEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
-        if (overlapStart < overlapEnd) {
-            return createTextSpanFromBounds(overlapStart, overlapEnd);
-        }
-        return undefined;
-    }
-    ts.textSpanOverlap = textSpanOverlap;
-    function textSpanIntersectsWithTextSpan(span, other) {
-        return other.start <= textSpanEnd(span) && textSpanEnd(other) >= span.start;
-    }
-    ts.textSpanIntersectsWithTextSpan = textSpanIntersectsWithTextSpan;
-    function textSpanIntersectsWith(span, start, length) {
-        var end = start + length;
-        return start <= textSpanEnd(span) && end >= span.start;
-    }
-    ts.textSpanIntersectsWith = textSpanIntersectsWith;
-    function decodedTextSpanIntersectsWith(start1, length1, start2, length2) {
-        var end1 = start1 + length1;
-        var end2 = start2 + length2;
-        return start2 <= end1 && end2 >= start1;
-    }
-    ts.decodedTextSpanIntersectsWith = decodedTextSpanIntersectsWith;
-    function textSpanIntersectsWithPosition(span, position) {
-        return position <= textSpanEnd(span) && position >= span.start;
-    }
-    ts.textSpanIntersectsWithPosition = textSpanIntersectsWithPosition;
-    function textSpanIntersection(span1, span2) {
-        var intersectStart = Math.max(span1.start, span2.start);
-        var intersectEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
-        if (intersectStart <= intersectEnd) {
-            return createTextSpanFromBounds(intersectStart, intersectEnd);
-        }
-        return undefined;
-    }
-    ts.textSpanIntersection = textSpanIntersection;
-    function createTextSpan(start, length) {
-        if (start < 0) {
-            throw new Error("start < 0");
-        }
-        if (length < 0) {
-            throw new Error("length < 0");
-        }
-        return { start: start, length: length };
-    }
-    ts.createTextSpan = createTextSpan;
-    function createTextSpanFromBounds(start, end) {
-        return createTextSpan(start, end - start);
-    }
-    ts.createTextSpanFromBounds = createTextSpanFromBounds;
-    function textChangeRangeNewSpan(range) {
-        return createTextSpan(range.span.start, range.newLength);
-    }
-    ts.textChangeRangeNewSpan = textChangeRangeNewSpan;
-    function textChangeRangeIsUnchanged(range) {
-        return textSpanIsEmpty(range.span) && range.newLength === 0;
-    }
-    ts.textChangeRangeIsUnchanged = textChangeRangeIsUnchanged;
-    function createTextChangeRange(span, newLength) {
-        if (newLength < 0) {
-            throw new Error("newLength < 0");
-        }
-        return { span: span, newLength: newLength };
-    }
-    ts.createTextChangeRange = createTextChangeRange;
-    ts.unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
-    function collapseTextChangeRangesAcrossMultipleVersions(changes) {
-        if (changes.length === 0) {
-            return ts.unchangedTextChangeRange;
-        }
-        if (changes.length === 1) {
-            return changes[0];
-        }
-        var change0 = changes[0];
-        var oldStartN = change0.span.start;
-        var oldEndN = textSpanEnd(change0.span);
-        var newEndN = oldStartN + change0.newLength;
-        for (var i = 1; i < changes.length; i++) {
-            var nextChange = changes[i];
-            var oldStart1 = oldStartN;
-            var oldEnd1 = oldEndN;
-            var newEnd1 = newEndN;
-            var oldStart2 = nextChange.span.start;
-            var oldEnd2 = textSpanEnd(nextChange.span);
-            var newEnd2 = oldStart2 + nextChange.newLength;
-            oldStartN = Math.min(oldStart1, oldStart2);
-            oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
-            newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
-        }
-        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), newEndN - oldStartN);
-    }
-    ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
-    function getTypeParameterOwner(d) {
-        if (d && d.kind === 141) {
-            for (var current = d; current; current = current.parent) {
-                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 222) {
-                    return current;
-                }
-            }
-        }
-    }
-    ts.getTypeParameterOwner = getTypeParameterOwner;
-    function isParameterPropertyDeclaration(node) {
-        return node.flags & 92 && node.parent.kind === 148 && ts.isClassLike(node.parent.parent);
-    }
-    ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
-    function startsWith(str, prefix) {
-        return str.lastIndexOf(prefix, 0) === 0;
-    }
-    ts.startsWith = startsWith;
-    function endsWith(str, suffix) {
-        var expectedPos = str.length - suffix.length;
-        return str.indexOf(suffix, expectedPos) === expectedPos;
-    }
-    ts.endsWith = endsWith;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.parseTime = 0;
-    var NodeConstructor;
-    var SourceFileConstructor;
-    function createNode(kind, pos, end) {
-        if (kind === 256) {
-            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
-        }
-        else {
-            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
-        }
-    }
-    ts.createNode = createNode;
-    function visitNode(cbNode, node) {
-        if (node) {
-            return cbNode(node);
-        }
-    }
-    function visitNodeArray(cbNodes, nodes) {
-        if (nodes) {
-            return cbNodes(nodes);
-        }
-    }
-    function visitEachNode(cbNode, nodes) {
-        if (nodes) {
-            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
-                var node = nodes_1[_i];
-                var result = cbNode(node);
-                if (result) {
-                    return result;
-                }
-            }
-        }
-    }
-    function forEachChild(node, cbNode, cbNodeArray) {
-        if (!node) {
-            return;
-        }
-        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
-        var cbNodes = cbNodeArray || cbNode;
-        switch (node.kind) {
-            case 139:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.right);
-            case 141:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.constraint) ||
-                    visitNode(cbNode, node.expression);
-            case 254:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.equalsToken) ||
-                    visitNode(cbNode, node.objectAssignmentInitializer);
-            case 142:
-            case 145:
-            case 144:
-            case 253:
-            case 218:
-            case 169:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.dotDotDotToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.initializer);
-            case 156:
-            case 157:
-            case 151:
-            case 152:
-            case 153:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 147:
-            case 146:
-            case 148:
-            case 149:
-            case 150:
-            case 179:
-            case 220:
-            case 180:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.equalsGreaterThanToken) ||
-                    visitNode(cbNode, node.body);
-            case 155:
-                return visitNode(cbNode, node.typeName) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 154:
-                return visitNode(cbNode, node.parameterName) ||
-                    visitNode(cbNode, node.type);
-            case 158:
-                return visitNode(cbNode, node.exprName);
-            case 159:
-                return visitNodes(cbNodes, node.members);
-            case 160:
-                return visitNode(cbNode, node.elementType);
-            case 161:
-                return visitNodes(cbNodes, node.elementTypes);
-            case 162:
-            case 163:
-                return visitNodes(cbNodes, node.types);
-            case 164:
-                return visitNode(cbNode, node.type);
-            case 167:
-            case 168:
-                return visitNodes(cbNodes, node.elements);
-            case 170:
-                return visitNodes(cbNodes, node.elements);
-            case 171:
-                return visitNodes(cbNodes, node.properties);
-            case 172:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.dotToken) ||
-                    visitNode(cbNode, node.name);
-            case 173:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.argumentExpression);
-            case 174:
-            case 175:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments) ||
-                    visitNodes(cbNodes, node.arguments);
-            case 176:
-                return visitNode(cbNode, node.tag) ||
-                    visitNode(cbNode, node.template);
-            case 177:
-                return visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.expression);
-            case 178:
-                return visitNode(cbNode, node.expression);
-            case 181:
-                return visitNode(cbNode, node.expression);
-            case 182:
-                return visitNode(cbNode, node.expression);
-            case 183:
-                return visitNode(cbNode, node.expression);
-            case 185:
-                return visitNode(cbNode, node.operand);
-            case 190:
-                return visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.expression);
-            case 184:
-                return visitNode(cbNode, node.expression);
-            case 186:
-                return visitNode(cbNode, node.operand);
-            case 187:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.operatorToken) ||
-                    visitNode(cbNode, node.right);
-            case 195:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.type);
-            case 196:
-                return visitNode(cbNode, node.expression);
-            case 188:
-                return visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.whenTrue) ||
-                    visitNode(cbNode, node.colonToken) ||
-                    visitNode(cbNode, node.whenFalse);
-            case 191:
-                return visitNode(cbNode, node.expression);
-            case 199:
-            case 226:
-                return visitNodes(cbNodes, node.statements);
-            case 256:
-                return visitNodes(cbNodes, node.statements) ||
-                    visitNode(cbNode, node.endOfFileToken);
-            case 200:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.declarationList);
-            case 219:
-                return visitNodes(cbNodes, node.declarations);
-            case 202:
-                return visitNode(cbNode, node.expression);
-            case 203:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.thenStatement) ||
-                    visitNode(cbNode, node.elseStatement);
-            case 204:
-                return visitNode(cbNode, node.statement) ||
-                    visitNode(cbNode, node.expression);
-            case 205:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 206:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.incrementor) ||
-                    visitNode(cbNode, node.statement);
-            case 207:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 208:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 209:
-            case 210:
-                return visitNode(cbNode, node.label);
-            case 211:
-                return visitNode(cbNode, node.expression);
-            case 212:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 213:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.caseBlock);
-            case 227:
-                return visitNodes(cbNodes, node.clauses);
-            case 249:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.statements);
-            case 250:
-                return visitNodes(cbNodes, node.statements);
-            case 214:
-                return visitNode(cbNode, node.label) ||
-                    visitNode(cbNode, node.statement);
-            case 215:
-                return visitNode(cbNode, node.expression);
-            case 216:
-                return visitNode(cbNode, node.tryBlock) ||
-                    visitNode(cbNode, node.catchClause) ||
-                    visitNode(cbNode, node.finallyBlock);
-            case 252:
-                return visitNode(cbNode, node.variableDeclaration) ||
-                    visitNode(cbNode, node.block);
-            case 143:
-                return visitNode(cbNode, node.expression);
-            case 221:
-            case 192:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 222:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 223:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNode(cbNode, node.type);
-            case 224:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.members);
-            case 255:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 225:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.body);
-            case 229:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.moduleReference);
-            case 230:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.importClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 231:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.namedBindings);
-            case 228:
-                return visitNode(cbNode, node.name);
-            case 232:
-                return visitNode(cbNode, node.name);
-            case 233:
-            case 237:
-                return visitNodes(cbNodes, node.elements);
-            case 236:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.exportClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 234:
-            case 238:
-                return visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.name);
-            case 235:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.expression);
-            case 189:
-                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
-            case 197:
-                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
-            case 140:
-                return visitNode(cbNode, node.expression);
-            case 251:
-                return visitNodes(cbNodes, node.types);
-            case 194:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 240:
-                return visitNode(cbNode, node.expression);
-            case 239:
-                return visitNodes(cbNodes, node.decorators);
-            case 241:
-                return visitNode(cbNode, node.openingElement) ||
-                    visitNodes(cbNodes, node.children) ||
-                    visitNode(cbNode, node.closingElement);
-            case 242:
-            case 243:
-                return visitNode(cbNode, node.tagName) ||
-                    visitNodes(cbNodes, node.attributes);
-            case 246:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 247:
-                return visitNode(cbNode, node.expression);
-            case 248:
-                return visitNode(cbNode, node.expression);
-            case 245:
-                return visitNode(cbNode, node.tagName);
-            case 257:
-                return visitNode(cbNode, node.type);
-            case 261:
-                return visitNodes(cbNodes, node.types);
-            case 262:
-                return visitNodes(cbNodes, node.types);
-            case 260:
-                return visitNode(cbNode, node.elementType);
-            case 264:
-                return visitNode(cbNode, node.type);
-            case 263:
-                return visitNode(cbNode, node.type);
-            case 265:
-                return visitNodes(cbNodes, node.members);
-            case 267:
-                return visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 268:
-                return visitNode(cbNode, node.type);
-            case 269:
-                return visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 270:
-                return visitNode(cbNode, node.type);
-            case 271:
-                return visitNode(cbNode, node.type);
-            case 272:
-                return visitNode(cbNode, node.type);
-            case 266:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.type);
-            case 273:
-                return visitNodes(cbNodes, node.tags);
-            case 275:
-                return visitNode(cbNode, node.preParameterName) ||
-                    visitNode(cbNode, node.typeExpression) ||
-                    visitNode(cbNode, node.postParameterName);
-            case 276:
-                return visitNode(cbNode, node.typeExpression);
-            case 277:
-                return visitNode(cbNode, node.typeExpression);
-            case 278:
-                return visitNodes(cbNodes, node.typeParameters);
-        }
-    }
-    ts.forEachChild = forEachChild;
-    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
-        if (setParentNodes === void 0) { setParentNodes = false; }
-        var start = new Date().getTime();
-        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, undefined, setParentNodes, scriptKind);
-        ts.parseTime += new Date().getTime() - start;
-        return result;
-    }
-    ts.createSourceFile = createSourceFile;
-    function isExternalModule(file) {
-        return file.externalModuleIndicator !== undefined;
-    }
-    ts.isExternalModule = isExternalModule;
-    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-        return IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
-    }
-    ts.updateSourceFile = updateSourceFile;
-    function parseIsolatedJSDocComment(content, start, length) {
-        return Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
-    }
-    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-    function parseJSDocTypeExpressionForTests(content, start, length) {
-        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
-    }
-    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-    var Parser;
-    (function (Parser) {
-        var scanner = ts.createScanner(2, true);
-        var disallowInAndDecoratorContext = 4194304 | 16777216;
-        var NodeConstructor;
-        var SourceFileConstructor;
-        var sourceFile;
-        var parseDiagnostics;
-        var syntaxCursor;
-        var token;
-        var sourceText;
-        var nodeCount;
-        var identifiers;
-        var identifierCount;
-        var parsingContext;
-        var contextFlags;
-        var parseErrorBeforeNextFinishedNode = false;
-        function parseSourceFile(fileName, _sourceText, languageVersion, _syntaxCursor, setParentNodes, scriptKind) {
-            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
-            initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind);
-            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
-            clearState();
-            return result;
-        }
-        Parser.parseSourceFile = parseSourceFile;
-        function getLanguageVariant(scriptKind) {
-            return scriptKind === 4 || scriptKind === 2 || scriptKind === 1 ? 1 : 0;
-        }
-        function initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind) {
-            NodeConstructor = ts.objectAllocator.getNodeConstructor();
-            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
-            sourceText = _sourceText;
-            syntaxCursor = _syntaxCursor;
-            parseDiagnostics = [];
-            parsingContext = 0;
-            identifiers = {};
-            identifierCount = 0;
-            nodeCount = 0;
-            contextFlags = scriptKind === 1 || scriptKind === 2 ? 134217728 : 0;
-            parseErrorBeforeNextFinishedNode = false;
-            scanner.setText(sourceText);
-            scanner.setOnError(scanError);
-            scanner.setScriptTarget(languageVersion);
-            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
-        }
-        function clearState() {
-            scanner.setText("");
-            scanner.setOnError(undefined);
-            parseDiagnostics = undefined;
-            sourceFile = undefined;
-            identifiers = undefined;
-            syntaxCursor = undefined;
-            sourceText = undefined;
-        }
-        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
-            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
-            sourceFile.flags = contextFlags;
-            token = nextToken();
-            processReferenceComments(sourceFile);
-            sourceFile.statements = parseList(0, parseStatement);
-            ts.Debug.assert(token === 1);
-            sourceFile.endOfFileToken = parseTokenNode();
-            setExternalModuleIndicator(sourceFile);
-            sourceFile.nodeCount = nodeCount;
-            sourceFile.identifierCount = identifierCount;
-            sourceFile.identifiers = identifiers;
-            sourceFile.parseDiagnostics = parseDiagnostics;
-            if (setParentNodes) {
-                fixupParentReferences(sourceFile);
-            }
-            return sourceFile;
-        }
-        function addJSDocComment(node) {
-            if (contextFlags & 134217728) {
-                var comments = ts.getLeadingCommentRangesOfNode(node, sourceFile);
-                if (comments) {
-                    for (var _i = 0, comments_1 = comments; _i < comments_1.length; _i++) {
-                        var comment = comments_1[_i];
-                        var jsDocComment = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
-                        if (jsDocComment) {
-                            node.jsDocComment = jsDocComment;
-                        }
-                    }
-                }
-            }
-            return node;
-        }
-        function fixupParentReferences(sourceFile) {
-            var parent = sourceFile;
-            forEachChild(sourceFile, visitNode);
-            return;
-            function visitNode(n) {
-                if (n.parent !== parent) {
-                    n.parent = parent;
-                    var saveParent = parent;
-                    parent = n;
-                    forEachChild(n, visitNode);
-                    parent = saveParent;
-                }
-            }
-        }
-        Parser.fixupParentReferences = fixupParentReferences;
-        function createSourceFile(fileName, languageVersion, scriptKind) {
-            var sourceFile = new SourceFileConstructor(256, 0, sourceText.length);
-            nodeCount++;
-            sourceFile.text = sourceText;
-            sourceFile.bindDiagnostics = [];
-            sourceFile.languageVersion = languageVersion;
-            sourceFile.fileName = ts.normalizePath(fileName);
-            sourceFile.languageVariant = getLanguageVariant(scriptKind);
-            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts");
-            sourceFile.scriptKind = scriptKind;
-            return sourceFile;
-        }
-        function setContextFlag(val, flag) {
-            if (val) {
-                contextFlags |= flag;
-            }
-            else {
-                contextFlags &= ~flag;
-            }
-        }
-        function setDisallowInContext(val) {
-            setContextFlag(val, 4194304);
-        }
-        function setYieldContext(val) {
-            setContextFlag(val, 8388608);
-        }
-        function setDecoratorContext(val) {
-            setContextFlag(val, 16777216);
-        }
-        function setAwaitContext(val) {
-            setContextFlag(val, 33554432);
-        }
-        function doOutsideOfContext(context, func) {
-            var contextFlagsToClear = context & contextFlags;
-            if (contextFlagsToClear) {
-                setContextFlag(false, contextFlagsToClear);
-                var result = func();
-                setContextFlag(true, contextFlagsToClear);
-                return result;
-            }
-            return func();
-        }
-        function doInsideOfContext(context, func) {
-            var contextFlagsToSet = context & ~contextFlags;
-            if (contextFlagsToSet) {
-                setContextFlag(true, contextFlagsToSet);
-                var result = func();
-                setContextFlag(false, contextFlagsToSet);
-                return result;
-            }
-            return func();
-        }
-        function allowInAnd(func) {
-            return doOutsideOfContext(4194304, func);
-        }
-        function disallowInAnd(func) {
-            return doInsideOfContext(4194304, func);
-        }
-        function doInYieldContext(func) {
-            return doInsideOfContext(8388608, func);
-        }
-        function doInDecoratorContext(func) {
-            return doInsideOfContext(16777216, func);
-        }
-        function doInAwaitContext(func) {
-            return doInsideOfContext(33554432, func);
-        }
-        function doOutsideOfAwaitContext(func) {
-            return doOutsideOfContext(33554432, func);
-        }
-        function doInYieldAndAwaitContext(func) {
-            return doInsideOfContext(8388608 | 33554432, func);
-        }
-        function inContext(flags) {
-            return (contextFlags & flags) !== 0;
-        }
-        function inYieldContext() {
-            return inContext(8388608);
-        }
-        function inDisallowInContext() {
-            return inContext(4194304);
-        }
-        function inDecoratorContext() {
-            return inContext(16777216);
-        }
-        function inAwaitContext() {
-            return inContext(33554432);
-        }
-        function parseErrorAtCurrentToken(message, arg0) {
-            var start = scanner.getTokenPos();
-            var length = scanner.getTextPos() - start;
-            parseErrorAtPosition(start, length, message, arg0);
-        }
-        function parseErrorAtPosition(start, length, message, arg0) {
-            var lastError = ts.lastOrUndefined(parseDiagnostics);
-            if (!lastError || start !== lastError.start) {
-                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
-            }
-            parseErrorBeforeNextFinishedNode = true;
-        }
-        function scanError(message, length) {
-            var pos = scanner.getTextPos();
-            parseErrorAtPosition(pos, length || 0, message);
-        }
-        function getNodePos() {
-            return scanner.getStartPos();
-        }
-        function getNodeEnd() {
-            return scanner.getStartPos();
-        }
-        function nextToken() {
-            return token = scanner.scan();
-        }
-        function reScanGreaterToken() {
-            return token = scanner.reScanGreaterToken();
-        }
-        function reScanSlashToken() {
-            return token = scanner.reScanSlashToken();
-        }
-        function reScanTemplateToken() {
-            return token = scanner.reScanTemplateToken();
-        }
-        function scanJsxIdentifier() {
-            return token = scanner.scanJsxIdentifier();
-        }
-        function scanJsxText() {
-            return token = scanner.scanJsxToken();
-        }
-        function speculationHelper(callback, isLookAhead) {
-            var saveToken = token;
-            var saveParseDiagnosticsLength = parseDiagnostics.length;
-            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-            var saveContextFlags = contextFlags;
-            var result = isLookAhead
-                ? scanner.lookAhead(callback)
-                : scanner.tryScan(callback);
-            ts.Debug.assert(saveContextFlags === contextFlags);
-            if (!result || isLookAhead) {
-                token = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-            }
-            return result;
-        }
-        function lookAhead(callback) {
-            return speculationHelper(callback, true);
-        }
-        function tryParse(callback) {
-            return speculationHelper(callback, false);
-        }
-        function isIdentifier() {
-            if (token === 69) {
-                return true;
-            }
-            if (token === 114 && inYieldContext()) {
-                return false;
-            }
-            if (token === 119 && inAwaitContext()) {
-                return false;
-            }
-            return token > 105;
-        }
-        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
-            if (shouldAdvance === void 0) { shouldAdvance = true; }
-            if (token === kind) {
-                if (shouldAdvance) {
-                    nextToken();
-                }
-                return true;
-            }
-            if (diagnosticMessage) {
-                parseErrorAtCurrentToken(diagnosticMessage);
-            }
-            else {
-                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
-            }
-            return false;
-        }
-        function parseOptional(t) {
-            if (token === t) {
-                nextToken();
-                return true;
-            }
-            return false;
-        }
-        function parseOptionalToken(t) {
-            if (token === t) {
-                return parseTokenNode();
-            }
-            return undefined;
-        }
-        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            return parseOptionalToken(t) ||
-                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
-        }
-        function parseTokenNode() {
-            var node = createNode(token);
-            nextToken();
-            return finishNode(node);
-        }
-        function canParseSemicolon() {
-            if (token === 23) {
-                return true;
-            }
-            return token === 16 || token === 1 || scanner.hasPrecedingLineBreak();
-        }
-        function parseSemicolon() {
-            if (canParseSemicolon()) {
-                if (token === 23) {
-                    nextToken();
-                }
-                return true;
-            }
-            else {
-                return parseExpected(23);
-            }
-        }
-        function createNode(kind, pos) {
-            nodeCount++;
-            if (!(pos >= 0)) {
-                pos = scanner.getStartPos();
-            }
-            return new NodeConstructor(kind, pos, pos);
-        }
-        function finishNode(node, end) {
-            node.end = end === undefined ? scanner.getStartPos() : end;
-            if (contextFlags) {
-                node.flags |= contextFlags;
-            }
-            if (parseErrorBeforeNextFinishedNode) {
-                parseErrorBeforeNextFinishedNode = false;
-                node.flags |= 67108864;
-            }
-            return node;
-        }
-        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            if (reportAtCurrentPosition) {
-                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
-            }
-            else {
-                parseErrorAtCurrentToken(diagnosticMessage, arg0);
-            }
-            var result = createNode(kind, scanner.getStartPos());
-            result.text = "";
-            return finishNode(result);
-        }
-        function internIdentifier(text) {
-            text = ts.escapeIdentifier(text);
-            return ts.hasProperty(identifiers, text) ? identifiers[text] : (identifiers[text] = text);
-        }
-        function createIdentifier(isIdentifier, diagnosticMessage) {
-            identifierCount++;
-            if (isIdentifier) {
-                var node = createNode(69);
-                if (token !== 69) {
-                    node.originalKeywordKind = token;
-                }
-                node.text = internIdentifier(scanner.getTokenValue());
-                nextToken();
-                return finishNode(node);
-            }
-            return createMissingNode(69, false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
-        }
-        function parseIdentifier(diagnosticMessage) {
-            return createIdentifier(isIdentifier(), diagnosticMessage);
-        }
-        function parseIdentifierName() {
-            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token));
-        }
-        function isLiteralPropertyName() {
-            return ts.tokenIsIdentifierOrKeyword(token) ||
-                token === 9 ||
-                token === 8;
-        }
-        function parsePropertyNameWorker(allowComputedPropertyNames) {
-            if (token === 9 || token === 8) {
-                return parseLiteralNode(true);
-            }
-            if (allowComputedPropertyNames && token === 19) {
-                return parseComputedPropertyName();
-            }
-            return parseIdentifierName();
-        }
-        function parsePropertyName() {
-            return parsePropertyNameWorker(true);
-        }
-        function parseSimplePropertyName() {
-            return parsePropertyNameWorker(false);
-        }
-        function isSimplePropertyName() {
-            return token === 9 || token === 8 || ts.tokenIsIdentifierOrKeyword(token);
-        }
-        function parseComputedPropertyName() {
-            var node = createNode(140);
-            parseExpected(19);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(20);
-            return finishNode(node);
-        }
-        function parseContextualModifier(t) {
-            return token === t && tryParse(nextTokenCanFollowModifier);
-        }
-        function nextTokenIsOnSameLineAndCanFollowModifier() {
-            nextToken();
-            if (scanner.hasPrecedingLineBreak()) {
-                return false;
-            }
-            return canFollowModifier();
-        }
-        function nextTokenCanFollowModifier() {
-            if (token === 74) {
-                return nextToken() === 81;
-            }
-            if (token === 82) {
-                nextToken();
-                if (token === 77) {
-                    return lookAhead(nextTokenIsClassOrFunction);
-                }
-                return token !== 37 && token !== 116 && token !== 15 && canFollowModifier();
-            }
-            if (token === 77) {
-                return nextTokenIsClassOrFunction();
-            }
-            if (token === 113) {
-                nextToken();
-                return canFollowModifier();
-            }
-            return nextTokenIsOnSameLineAndCanFollowModifier();
-        }
-        function parseAnyContextualModifier() {
-            return ts.isModifierKind(token) && tryParse(nextTokenCanFollowModifier);
-        }
-        function canFollowModifier() {
-            return token === 19
-                || token === 15
-                || token === 37
-                || isLiteralPropertyName();
-        }
-        function nextTokenIsClassOrFunction() {
-            nextToken();
-            return token === 73 || token === 87;
-        }
-        function isListElement(parsingContext, inErrorRecovery) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return true;
-            }
-            switch (parsingContext) {
-                case 0:
-                case 1:
-                case 3:
-                    return !(token === 23 && inErrorRecovery) && isStartOfStatement();
-                case 2:
-                    return token === 71 || token === 77;
-                case 4:
-                    return lookAhead(isTypeMemberStart);
-                case 5:
-                    return lookAhead(isClassMemberStart) || (token === 23 && !inErrorRecovery);
-                case 6:
-                    return token === 19 || isLiteralPropertyName();
-                case 12:
-                    return token === 19 || token === 37 || isLiteralPropertyName();
-                case 9:
-                    return token === 19 || isLiteralPropertyName();
-                case 7:
-                    if (token === 15) {
-                        return lookAhead(isValidHeritageClauseObjectLiteral);
-                    }
-                    if (!inErrorRecovery) {
-                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
-                    }
-                    else {
-                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
-                    }
-                case 8:
-                    return isIdentifierOrPattern();
-                case 10:
-                    return token === 24 || token === 22 || isIdentifierOrPattern();
-                case 17:
-                    return isIdentifier();
-                case 11:
-                case 15:
-                    return token === 24 || token === 22 || isStartOfExpression();
-                case 16:
-                    return isStartOfParameter();
-                case 18:
-                case 19:
-                    return token === 24 || isStartOfType();
-                case 20:
-                    return isHeritageClause();
-                case 21:
-                    return ts.tokenIsIdentifierOrKeyword(token);
-                case 13:
-                    return ts.tokenIsIdentifierOrKeyword(token) || token === 15;
-                case 14:
-                    return true;
-                case 22:
-                case 23:
-                case 25:
-                    return JSDocParser.isJSDocType();
-                case 24:
-                    return isSimplePropertyName();
-            }
-            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
-        }
-        function isValidHeritageClauseObjectLiteral() {
-            ts.Debug.assert(token === 15);
-            if (nextToken() === 16) {
-                var next = nextToken();
-                return next === 24 || next === 15 || next === 83 || next === 106;
-            }
-            return true;
-        }
-        function nextTokenIsIdentifier() {
-            nextToken();
-            return isIdentifier();
-        }
-        function nextTokenIsIdentifierOrKeyword() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token);
-        }
-        function isHeritageClauseExtendsOrImplementsKeyword() {
-            if (token === 106 ||
-                token === 83) {
-                return lookAhead(nextTokenIsStartOfExpression);
-            }
-            return false;
-        }
-        function nextTokenIsStartOfExpression() {
-            nextToken();
-            return isStartOfExpression();
-        }
-        function isListTerminator(kind) {
-            if (token === 1) {
-                return true;
-            }
-            switch (kind) {
-                case 1:
-                case 2:
-                case 4:
-                case 5:
-                case 6:
-                case 12:
-                case 9:
-                case 21:
-                    return token === 16;
-                case 3:
-                    return token === 16 || token === 71 || token === 77;
-                case 7:
-                    return token === 15 || token === 83 || token === 106;
-                case 8:
-                    return isVariableDeclaratorListTerminator();
-                case 17:
-                    return token === 27 || token === 17 || token === 15 || token === 83 || token === 106;
-                case 11:
-                    return token === 18 || token === 23;
-                case 15:
-                case 19:
-                case 10:
-                    return token === 20;
-                case 16:
-                    return token === 18 || token === 20;
-                case 18:
-                    return token === 27 || token === 17;
-                case 20:
-                    return token === 15 || token === 16;
-                case 13:
-                    return token === 27 || token === 39;
-                case 14:
-                    return token === 25 && lookAhead(nextTokenIsSlash);
-                case 22:
-                    return token === 18 || token === 54 || token === 16;
-                case 23:
-                    return token === 27 || token === 16;
-                case 25:
-                    return token === 20 || token === 16;
-                case 24:
-                    return token === 16;
-            }
-        }
-        function isVariableDeclaratorListTerminator() {
-            if (canParseSemicolon()) {
-                return true;
-            }
-            if (isInOrOfKeyword(token)) {
-                return true;
-            }
-            if (token === 34) {
-                return true;
-            }
-            return false;
-        }
-        function isInSomeParsingContext() {
-            for (var kind = 0; kind < 26; kind++) {
-                if (parsingContext & (1 << kind)) {
-                    if (isListElement(kind, true) || isListTerminator(kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function parseList(kind, parseElement) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = [];
-            result.pos = getNodePos();
-            while (!isListTerminator(kind)) {
-                if (isListElement(kind, false)) {
-                    var element = parseListElement(kind, parseElement);
-                    result.push(element);
-                    continue;
-                }
-                if (abortParsingListOrMoveToNextToken(kind)) {
-                    break;
-                }
-            }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function parseListElement(parsingContext, parseElement) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return consumeNode(node);
-            }
-            return parseElement();
-        }
-        function currentNode(parsingContext) {
-            if (parseErrorBeforeNextFinishedNode) {
-                return undefined;
-            }
-            if (!syntaxCursor) {
-                return undefined;
-            }
-            var node = syntaxCursor.currentNode(scanner.getStartPos());
-            if (ts.nodeIsMissing(node)) {
-                return undefined;
-            }
-            if (node.intersectsChange) {
-                return undefined;
-            }
-            if (ts.containsParseError(node)) {
-                return undefined;
-            }
-            var nodeContextFlags = node.flags & 197132288;
-            if (nodeContextFlags !== contextFlags) {
-                return undefined;
-            }
-            if (!canReuseNode(node, parsingContext)) {
-                return undefined;
-            }
-            return node;
-        }
-        function consumeNode(node) {
-            scanner.setTextPos(node.end);
-            nextToken();
-            return node;
-        }
-        function canReuseNode(node, parsingContext) {
-            switch (parsingContext) {
-                case 5:
-                    return isReusableClassMember(node);
-                case 2:
-                    return isReusableSwitchClause(node);
-                case 0:
-                case 1:
-                case 3:
-                    return isReusableStatement(node);
-                case 6:
-                    return isReusableEnumMember(node);
-                case 4:
-                    return isReusableTypeMember(node);
-                case 8:
-                    return isReusableVariableDeclaration(node);
-                case 16:
-                    return isReusableParameter(node);
-                case 20:
-                case 17:
-                case 19:
-                case 18:
-                case 11:
-                case 12:
-                case 7:
-                case 13:
-                case 14:
-            }
-            return false;
-        }
-        function isReusableClassMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 148:
-                    case 153:
-                    case 149:
-                    case 150:
-                    case 145:
-                    case 198:
-                        return true;
-                    case 147:
-                        var methodDeclaration = node;
-                        var nameIsConstructor = methodDeclaration.name.kind === 69 &&
-                            methodDeclaration.name.originalKeywordKind === 121;
-                        return !nameIsConstructor;
-                }
-            }
-            return false;
-        }
-        function isReusableSwitchClause(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 249:
-                    case 250:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableStatement(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 220:
-                    case 200:
-                    case 199:
-                    case 203:
-                    case 202:
-                    case 215:
-                    case 211:
-                    case 213:
-                    case 210:
-                    case 209:
-                    case 207:
-                    case 208:
-                    case 206:
-                    case 205:
-                    case 212:
-                    case 201:
-                    case 216:
-                    case 214:
-                    case 204:
-                    case 217:
-                    case 230:
-                    case 229:
-                    case 236:
-                    case 235:
-                    case 225:
-                    case 221:
-                    case 222:
-                    case 224:
-                    case 223:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableEnumMember(node) {
-            return node.kind === 255;
-        }
-        function isReusableTypeMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 152:
-                    case 146:
-                    case 153:
-                    case 144:
-                    case 151:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableVariableDeclaration(node) {
-            if (node.kind !== 218) {
-                return false;
-            }
-            var variableDeclarator = node;
-            return variableDeclarator.initializer === undefined;
-        }
-        function isReusableParameter(node) {
-            if (node.kind !== 142) {
-                return false;
-            }
-            var parameter = node;
-            return parameter.initializer === undefined;
-        }
-        function abortParsingListOrMoveToNextToken(kind) {
-            parseErrorAtCurrentToken(parsingContextErrors(kind));
-            if (isInSomeParsingContext()) {
-                return true;
-            }
-            nextToken();
-            return false;
-        }
-        function parsingContextErrors(context) {
-            switch (context) {
-                case 0: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 1: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 2: return ts.Diagnostics.case_or_default_expected;
-                case 3: return ts.Diagnostics.Statement_expected;
-                case 4: return ts.Diagnostics.Property_or_signature_expected;
-                case 5: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
-                case 6: return ts.Diagnostics.Enum_member_expected;
-                case 7: return ts.Diagnostics.Expression_expected;
-                case 8: return ts.Diagnostics.Variable_declaration_expected;
-                case 9: return ts.Diagnostics.Property_destructuring_pattern_expected;
-                case 10: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
-                case 11: return ts.Diagnostics.Argument_expression_expected;
-                case 12: return ts.Diagnostics.Property_assignment_expected;
-                case 15: return ts.Diagnostics.Expression_or_comma_expected;
-                case 16: return ts.Diagnostics.Parameter_declaration_expected;
-                case 17: return ts.Diagnostics.Type_parameter_declaration_expected;
-                case 18: return ts.Diagnostics.Type_argument_expected;
-                case 19: return ts.Diagnostics.Type_expected;
-                case 20: return ts.Diagnostics.Unexpected_token_expected;
-                case 21: return ts.Diagnostics.Identifier_expected;
-                case 13: return ts.Diagnostics.Identifier_expected;
-                case 14: return ts.Diagnostics.Identifier_expected;
-                case 22: return ts.Diagnostics.Parameter_declaration_expected;
-                case 23: return ts.Diagnostics.Type_argument_expected;
-                case 25: return ts.Diagnostics.Type_expected;
-                case 24: return ts.Diagnostics.Property_assignment_expected;
-            }
-        }
-        ;
-        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = [];
-            result.pos = getNodePos();
-            var commaStart = -1;
-            while (true) {
-                if (isListElement(kind, false)) {
-                    result.push(parseListElement(kind, parseElement));
-                    commaStart = scanner.getTokenPos();
-                    if (parseOptional(24)) {
-                        continue;
-                    }
-                    commaStart = -1;
-                    if (isListTerminator(kind)) {
-                        break;
-                    }
-                    parseExpected(24);
-                    if (considerSemicolonAsDelimiter && token === 23 && !scanner.hasPrecedingLineBreak()) {
-                        nextToken();
-                    }
-                    continue;
-                }
-                if (isListTerminator(kind)) {
-                    break;
-                }
-                if (abortParsingListOrMoveToNextToken(kind)) {
-                    break;
-                }
-            }
-            if (commaStart >= 0) {
-                result.hasTrailingComma = true;
-            }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function createMissingList() {
-            var pos = getNodePos();
-            var result = [];
-            result.pos = pos;
-            result.end = pos;
-            return result;
-        }
-        function parseBracketedList(kind, parseElement, open, close) {
-            if (parseExpected(open)) {
-                var result = parseDelimitedList(kind, parseElement);
-                parseExpected(close);
-                return result;
-            }
-            return createMissingList();
-        }
-        function parseEntityName(allowReservedWords, diagnosticMessage) {
-            var entity = parseIdentifier(diagnosticMessage);
-            while (parseOptional(21)) {
-                var node = createNode(139, entity.pos);
-                node.left = entity;
-                node.right = parseRightSideOfDot(allowReservedWords);
-                entity = finishNode(node);
-            }
-            return entity;
-        }
-        function parseRightSideOfDot(allowIdentifierNames) {
-            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token)) {
-                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                if (matchesPattern) {
-                    return createMissingNode(69, true, ts.Diagnostics.Identifier_expected);
-                }
-            }
-            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
-        }
-        function parseTemplateExpression() {
-            var template = createNode(189);
-            template.head = parseTemplateLiteralFragment();
-            ts.Debug.assert(template.head.kind === 12, "Template head has wrong token kind");
-            var templateSpans = [];
-            templateSpans.pos = getNodePos();
-            do {
-                templateSpans.push(parseTemplateSpan());
-            } while (ts.lastOrUndefined(templateSpans).literal.kind === 13);
-            templateSpans.end = getNodeEnd();
-            template.templateSpans = templateSpans;
-            return finishNode(template);
-        }
-        function parseTemplateSpan() {
-            var span = createNode(197);
-            span.expression = allowInAnd(parseExpression);
-            var literal;
-            if (token === 16) {
-                reScanTemplateToken();
-                literal = parseTemplateLiteralFragment();
-            }
-            else {
-                literal = parseExpectedToken(14, false, ts.Diagnostics._0_expected, ts.tokenToString(16));
-            }
-            span.literal = literal;
-            return finishNode(span);
-        }
-        function parseStringLiteralTypeNode() {
-            return parseLiteralLikeNode(166, true);
-        }
-        function parseLiteralNode(internName) {
-            return parseLiteralLikeNode(token, internName);
-        }
-        function parseTemplateLiteralFragment() {
-            return parseLiteralLikeNode(token, false);
-        }
-        function parseLiteralLikeNode(kind, internName) {
-            var node = createNode(kind);
-            var text = scanner.getTokenValue();
-            node.text = internName ? internIdentifier(text) : text;
-            if (scanner.hasExtendedUnicodeEscape()) {
-                node.hasExtendedUnicodeEscape = true;
-            }
-            if (scanner.isUnterminated()) {
-                node.isUnterminated = true;
-            }
-            var tokenPos = scanner.getTokenPos();
-            nextToken();
-            finishNode(node);
-            if (node.kind === 8
-                && sourceText.charCodeAt(tokenPos) === 48
-                && ts.isOctalDigit(sourceText.charCodeAt(tokenPos + 1))) {
-                node.isOctalLiteral = true;
-            }
-            return node;
-        }
-        function parseTypeReference() {
-            var typeName = parseEntityName(false, ts.Diagnostics.Type_expected);
-            var node = createNode(155, typeName.pos);
-            node.typeName = typeName;
-            if (!scanner.hasPrecedingLineBreak() && token === 25) {
-                node.typeArguments = parseBracketedList(18, parseType, 25, 27);
-            }
-            return finishNode(node);
-        }
-        function parseThisTypePredicate(lhs) {
-            nextToken();
-            var node = createNode(154, lhs.pos);
-            node.parameterName = lhs;
-            node.type = parseType();
-            return finishNode(node);
-        }
-        function parseThisTypeNode() {
-            var node = createNode(165);
-            nextToken();
-            return finishNode(node);
-        }
-        function parseTypeQuery() {
-            var node = createNode(158);
-            parseExpected(101);
-            node.exprName = parseEntityName(true);
-            return finishNode(node);
-        }
-        function parseTypeParameter() {
-            var node = createNode(141);
-            node.name = parseIdentifier();
-            if (parseOptional(83)) {
-                if (isStartOfType() || !isStartOfExpression()) {
-                    node.constraint = parseType();
-                }
-                else {
-                    node.expression = parseUnaryExpressionOrHigher();
-                }
-            }
-            return finishNode(node);
-        }
-        function parseTypeParameters() {
-            if (token === 25) {
-                return parseBracketedList(17, parseTypeParameter, 25, 27);
-            }
-        }
-        function parseParameterType() {
-            if (parseOptional(54)) {
-                return parseType();
-            }
-            return undefined;
-        }
-        function isStartOfParameter() {
-            return token === 22 || isIdentifierOrPattern() || ts.isModifierKind(token) || token === 55 || token === 97;
-        }
-        function setModifiers(node, modifiers) {
-            if (modifiers) {
-                node.flags |= modifiers.flags;
-                node.modifiers = modifiers;
-            }
-        }
-        function parseParameter() {
-            var node = createNode(142);
-            if (token === 97) {
-                node.name = createIdentifier(true, undefined);
-                node.type = parseParameterType();
-                return finishNode(node);
-            }
-            node.decorators = parseDecorators();
-            setModifiers(node, parseModifiers());
-            node.dotDotDotToken = parseOptionalToken(22);
-            node.name = parseIdentifierOrPattern();
-            if (ts.getFullWidth(node.name) === 0 && node.flags === 0 && ts.isModifierKind(token)) {
-                nextToken();
-            }
-            node.questionToken = parseOptionalToken(53);
-            node.type = parseParameterType();
-            node.initializer = parseBindingElementInitializer(true);
-            return addJSDocComment(finishNode(node));
-        }
-        function parseBindingElementInitializer(inParameter) {
-            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
-        }
-        function parseParameterInitializer() {
-            return parseInitializer(true);
-        }
-        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
-            var returnTokenRequired = returnToken === 34;
-            signature.typeParameters = parseTypeParameters();
-            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
-            if (returnTokenRequired) {
-                parseExpected(returnToken);
-                signature.type = parseTypeOrTypePredicate();
-            }
-            else if (parseOptional(returnToken)) {
-                signature.type = parseTypeOrTypePredicate();
-            }
-        }
-        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
-            if (parseExpected(17)) {
-                var savedYieldContext = inYieldContext();
-                var savedAwaitContext = inAwaitContext();
-                setYieldContext(yieldContext);
-                setAwaitContext(awaitContext);
-                var result = parseDelimitedList(16, parseParameter);
-                setYieldContext(savedYieldContext);
-                setAwaitContext(savedAwaitContext);
-                if (!parseExpected(18) && requireCompleteParameterList) {
-                    return undefined;
-                }
-                return result;
-            }
-            return requireCompleteParameterList ? undefined : createMissingList();
-        }
-        function parseTypeMemberSemicolon() {
-            if (parseOptional(24)) {
-                return;
-            }
-            parseSemicolon();
-        }
-        function parseSignatureMember(kind) {
-            var node = createNode(kind);
-            if (kind === 152) {
-                parseExpected(92);
-            }
-            fillSignature(54, false, false, false, node);
-            parseTypeMemberSemicolon();
-            return finishNode(node);
-        }
-        function isIndexSignature() {
-            if (token !== 19) {
-                return false;
-            }
-            return lookAhead(isUnambiguouslyIndexSignature);
-        }
-        function isUnambiguouslyIndexSignature() {
-            nextToken();
-            if (token === 22 || token === 20) {
-                return true;
-            }
-            if (ts.isModifierKind(token)) {
-                nextToken();
-                if (isIdentifier()) {
-                    return true;
-                }
-            }
-            else if (!isIdentifier()) {
-                return false;
-            }
-            else {
-                nextToken();
-            }
-            if (token === 54 || token === 24) {
-                return true;
-            }
-            if (token !== 53) {
-                return false;
-            }
-            nextToken();
-            return token === 54 || token === 24 || token === 20;
-        }
-        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(153, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.parameters = parseBracketedList(16, parseParameter, 19, 20);
-            node.type = parseTypeAnnotation();
-            parseTypeMemberSemicolon();
-            return finishNode(node);
-        }
-        function parsePropertyOrMethodSignature(fullStart, modifiers) {
-            var name = parsePropertyName();
-            var questionToken = parseOptionalToken(53);
-            if (token === 17 || token === 25) {
-                var method = createNode(146, fullStart);
-                setModifiers(method, modifiers);
-                method.name = name;
-                method.questionToken = questionToken;
-                fillSignature(54, false, false, false, method);
-                parseTypeMemberSemicolon();
-                return finishNode(method);
-            }
-            else {
-                var property = createNode(144, fullStart);
-                setModifiers(property, modifiers);
-                property.name = name;
-                property.questionToken = questionToken;
-                property.type = parseTypeAnnotation();
-                if (token === 56) {
-                    property.initializer = parseNonParameterInitializer();
-                }
-                parseTypeMemberSemicolon();
-                return finishNode(property);
-            }
-        }
-        function isTypeMemberStart() {
-            var idToken;
-            if (token === 17 || token === 25) {
-                return true;
-            }
-            while (ts.isModifierKind(token)) {
-                idToken = token;
-                nextToken();
-            }
-            if (token === 19) {
-                return true;
-            }
-            if (isLiteralPropertyName()) {
-                idToken = token;
-                nextToken();
-            }
-            if (idToken) {
-                return token === 17 ||
-                    token === 25 ||
-                    token === 53 ||
-                    token === 54 ||
-                    canParseSemicolon();
-            }
-            return false;
-        }
-        function parseTypeMember() {
-            if (token === 17 || token === 25) {
-                return parseSignatureMember(151);
-            }
-            if (token === 92 && lookAhead(isStartOfConstructSignature)) {
-                return parseSignatureMember(152);
-            }
-            var fullStart = getNodePos();
-            var modifiers = parseModifiers();
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, undefined, modifiers);
-            }
-            return parsePropertyOrMethodSignature(fullStart, modifiers);
-        }
-        function isStartOfConstructSignature() {
-            nextToken();
-            return token === 17 || token === 25;
-        }
-        function parseTypeLiteral() {
-            var node = createNode(159);
-            node.members = parseObjectTypeMembers();
-            return finishNode(node);
-        }
-        function parseObjectTypeMembers() {
-            var members;
-            if (parseExpected(15)) {
-                members = parseList(4, parseTypeMember);
-                parseExpected(16);
-            }
-            else {
-                members = createMissingList();
-            }
-            return members;
-        }
-        function parseTupleType() {
-            var node = createNode(161);
-            node.elementTypes = parseBracketedList(19, parseType, 19, 20);
-            return finishNode(node);
-        }
-        function parseParenthesizedType() {
-            var node = createNode(164);
-            parseExpected(17);
-            node.type = parseType();
-            parseExpected(18);
-            return finishNode(node);
-        }
-        function parseFunctionOrConstructorType(kind) {
-            var node = createNode(kind);
-            if (kind === 157) {
-                parseExpected(92);
-            }
-            fillSignature(34, false, false, false, node);
-            return finishNode(node);
-        }
-        function parseKeywordAndNoDot() {
-            var node = parseTokenNode();
-            return token === 21 ? undefined : node;
-        }
-        function parseNonArrayType() {
-            switch (token) {
-                case 117:
-                case 132:
-                case 130:
-                case 120:
-                case 133:
-                case 135:
-                case 127:
-                    var node = tryParse(parseKeywordAndNoDot);
-                    return node || parseTypeReference();
-                case 9:
-                    return parseStringLiteralTypeNode();
-                case 103:
-                case 93:
-                    return parseTokenNode();
-                case 97: {
-                    var thisKeyword = parseThisTypeNode();
-                    if (token === 124 && !scanner.hasPrecedingLineBreak()) {
-                        return parseThisTypePredicate(thisKeyword);
-                    }
-                    else {
-                        return thisKeyword;
-                    }
-                }
-                case 101:
-                    return parseTypeQuery();
-                case 15:
-                    return parseTypeLiteral();
-                case 19:
-                    return parseTupleType();
-                case 17:
-                    return parseParenthesizedType();
-                default:
-                    return parseTypeReference();
-            }
-        }
-        function isStartOfType() {
-            switch (token) {
-                case 117:
-                case 132:
-                case 130:
-                case 120:
-                case 133:
-                case 103:
-                case 135:
-                case 93:
-                case 97:
-                case 101:
-                case 127:
-                case 15:
-                case 19:
-                case 25:
-                case 92:
-                case 9:
-                    return true;
-                case 17:
-                    return lookAhead(isStartOfParenthesizedOrFunctionType);
-                default:
-                    return isIdentifier();
-            }
-        }
-        function isStartOfParenthesizedOrFunctionType() {
-            nextToken();
-            return token === 18 || isStartOfParameter() || isStartOfType();
-        }
-        function parseArrayTypeOrHigher() {
-            var type = parseNonArrayType();
-            while (!scanner.hasPrecedingLineBreak() && parseOptional(19)) {
-                parseExpected(20);
-                var node = createNode(160, type.pos);
-                node.elementType = type;
-                type = finishNode(node);
-            }
-            return type;
-        }
-        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
-            var type = parseConstituentType();
-            if (token === operator) {
-                var types = [type];
-                types.pos = type.pos;
-                while (parseOptional(operator)) {
-                    types.push(parseConstituentType());
-                }
-                types.end = getNodeEnd();
-                var node = createNode(kind, type.pos);
-                node.types = types;
-                type = finishNode(node);
-            }
-            return type;
-        }
-        function parseIntersectionTypeOrHigher() {
-            return parseUnionOrIntersectionType(163, parseArrayTypeOrHigher, 46);
-        }
-        function parseUnionTypeOrHigher() {
-            return parseUnionOrIntersectionType(162, parseIntersectionTypeOrHigher, 47);
-        }
-        function isStartOfFunctionType() {
-            if (token === 25) {
-                return true;
-            }
-            return token === 17 && lookAhead(isUnambiguouslyStartOfFunctionType);
-        }
-        function skipParameterStart() {
-            if (ts.isModifierKind(token)) {
-                parseModifiers();
-            }
-            if (isIdentifier() || token === 97) {
-                nextToken();
-                return true;
-            }
-            if (token === 19 || token === 15) {
-                var previousErrorCount = parseDiagnostics.length;
-                parseIdentifierOrPattern();
-                return previousErrorCount === parseDiagnostics.length;
-            }
-            return false;
-        }
-        function isUnambiguouslyStartOfFunctionType() {
-            nextToken();
-            if (token === 18 || token === 22) {
-                return true;
-            }
-            if (skipParameterStart()) {
-                if (token === 54 || token === 24 ||
-                    token === 53 || token === 56) {
-                    return true;
-                }
-                if (token === 18) {
-                    nextToken();
-                    if (token === 34) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function parseTypeOrTypePredicate() {
-            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
-            var type = parseType();
-            if (typePredicateVariable) {
-                var node = createNode(154, typePredicateVariable.pos);
-                node.parameterName = typePredicateVariable;
-                node.type = type;
-                return finishNode(node);
-            }
-            else {
-                return type;
-            }
-        }
-        function parseTypePredicatePrefix() {
-            var id = parseIdentifier();
-            if (token === 124 && !scanner.hasPrecedingLineBreak()) {
-                nextToken();
-                return id;
-            }
-        }
-        function parseType() {
-            return doOutsideOfContext(41943040, parseTypeWorker);
-        }
-        function parseTypeWorker() {
-            if (isStartOfFunctionType()) {
-                return parseFunctionOrConstructorType(156);
-            }
-            if (token === 92) {
-                return parseFunctionOrConstructorType(157);
-            }
-            return parseUnionTypeOrHigher();
-        }
-        function parseTypeAnnotation() {
-            return parseOptional(54) ? parseType() : undefined;
-        }
-        function isStartOfLeftHandSideExpression() {
-            switch (token) {
-                case 97:
-                case 95:
-                case 93:
-                case 99:
-                case 84:
-                case 8:
-                case 9:
-                case 11:
-                case 12:
-                case 17:
-                case 19:
-                case 15:
-                case 87:
-                case 73:
-                case 92:
-                case 39:
-                case 61:
-                case 69:
-                    return true;
-                default:
-                    return isIdentifier();
-            }
-        }
-        function isStartOfExpression() {
-            if (isStartOfLeftHandSideExpression()) {
-                return true;
-            }
-            switch (token) {
-                case 35:
-                case 36:
-                case 50:
-                case 49:
-                case 78:
-                case 101:
-                case 103:
-                case 41:
-                case 42:
-                case 25:
-                case 119:
-                case 114:
-                    return true;
-                default:
-                    if (isBinaryOperator()) {
-                        return true;
-                    }
-                    return isIdentifier();
-            }
-        }
-        function isStartOfExpressionStatement() {
-            return token !== 15 &&
-                token !== 87 &&
-                token !== 73 &&
-                token !== 55 &&
-                isStartOfExpression();
-        }
-        function parseExpression() {
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(false);
-            }
-            var expr = parseAssignmentExpressionOrHigher();
-            var operatorToken;
-            while ((operatorToken = parseOptionalToken(24))) {
-                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
-            }
-            if (saveDecoratorContext) {
-                setDecoratorContext(true);
-            }
-            return expr;
-        }
-        function parseInitializer(inParameter) {
-            if (token !== 56) {
-                if (scanner.hasPrecedingLineBreak() || (inParameter && token === 15) || !isStartOfExpression()) {
-                    return undefined;
-                }
-            }
-            parseExpected(56);
-            return parseAssignmentExpressionOrHigher();
-        }
-        function parseAssignmentExpressionOrHigher() {
-            if (isYieldExpression()) {
-                return parseYieldExpression();
-            }
-            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
-            if (arrowExpression) {
-                return arrowExpression;
-            }
-            var expr = parseBinaryExpressionOrHigher(0);
-            if (expr.kind === 69 && token === 34) {
-                return parseSimpleArrowFunctionExpression(expr);
-            }
-            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
-                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
-            }
-            return parseConditionalExpressionRest(expr);
-        }
-        function isYieldExpression() {
-            if (token === 114) {
-                if (inYieldContext()) {
-                    return true;
-                }
-                return lookAhead(nextTokenIsIdentifierOrKeywordOrNumberOnSameLine);
-            }
-            return false;
-        }
-        function nextTokenIsIdentifierOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && isIdentifier();
-        }
-        function parseYieldExpression() {
-            var node = createNode(190);
-            nextToken();
-            if (!scanner.hasPrecedingLineBreak() &&
-                (token === 37 || isStartOfExpression())) {
-                node.asteriskToken = parseOptionalToken(37);
-                node.expression = parseAssignmentExpressionOrHigher();
-                return finishNode(node);
-            }
-            else {
-                return finishNode(node);
-            }
-        }
-        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
-            ts.Debug.assert(token === 34, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
-            var node;
-            if (asyncModifier) {
-                node = createNode(180, asyncModifier.pos);
-                setModifiers(node, asyncModifier);
-            }
-            else {
-                node = createNode(180, identifier.pos);
-            }
-            var parameter = createNode(142, identifier.pos);
-            parameter.name = identifier;
-            finishNode(parameter);
-            node.parameters = [parameter];
-            node.parameters.pos = parameter.pos;
-            node.parameters.end = parameter.end;
-            node.equalsGreaterThanToken = parseExpectedToken(34, false, ts.Diagnostics._0_expected, "=>");
-            node.body = parseArrowFunctionExpressionBody(!!asyncModifier);
-            return finishNode(node);
-        }
-        function tryParseParenthesizedArrowFunctionExpression() {
-            var triState = isParenthesizedArrowFunctionExpression();
-            if (triState === 0) {
-                return undefined;
-            }
-            var arrowFunction = triState === 1
-                ? parseParenthesizedArrowFunctionExpressionHead(true)
-                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
-            if (!arrowFunction) {
-                return undefined;
-            }
-            var isAsync = !!(arrowFunction.flags & 256);
-            var lastToken = token;
-            arrowFunction.equalsGreaterThanToken = parseExpectedToken(34, false, ts.Diagnostics._0_expected, "=>");
-            arrowFunction.body = (lastToken === 34 || lastToken === 15)
-                ? parseArrowFunctionExpressionBody(isAsync)
-                : parseIdentifier();
-            return finishNode(arrowFunction);
-        }
-        function isParenthesizedArrowFunctionExpression() {
-            if (token === 17 || token === 25 || token === 118) {
-                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
-            }
-            if (token === 34) {
-                return 1;
-            }
-            return 0;
-        }
-        function isParenthesizedArrowFunctionExpressionWorker() {
-            if (token === 118) {
-                nextToken();
-                if (scanner.hasPrecedingLineBreak()) {
-                    return 0;
-                }
-                if (token !== 17 && token !== 25) {
-                    return 0;
-                }
-            }
-            var first = token;
-            var second = nextToken();
-            if (first === 17) {
-                if (second === 18) {
-                    var third = nextToken();
-                    switch (third) {
-                        case 34:
-                        case 54:
-                        case 15:
-                            return 1;
-                        default:
-                            return 0;
-                    }
-                }
-                if (second === 19 || second === 15) {
-                    return 2;
-                }
-                if (second === 22) {
-                    return 1;
-                }
-                if (!isIdentifier()) {
-                    return 0;
-                }
-                if (nextToken() === 54) {
-                    return 1;
-                }
-                return 2;
-            }
-            else {
-                ts.Debug.assert(first === 25);
-                if (!isIdentifier()) {
-                    return 0;
-                }
-                if (sourceFile.languageVariant === 1) {
-                    var isArrowFunctionInJsx = lookAhead(function () {
-                        var third = nextToken();
-                        if (third === 83) {
-                            var fourth = nextToken();
-                            switch (fourth) {
-                                case 56:
-                                case 27:
-                                    return false;
-                                default:
-                                    return true;
-                            }
-                        }
-                        else if (third === 24) {
-                            return true;
-                        }
-                        return false;
-                    });
-                    if (isArrowFunctionInJsx) {
-                        return 1;
-                    }
-                    return 0;
-                }
-                return 2;
-            }
-        }
-        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
-            return parseParenthesizedArrowFunctionExpressionHead(false);
-        }
-        function tryParseAsyncSimpleArrowFunctionExpression() {
-            if (token === 118) {
-                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
-                if (isUnParenthesizedAsyncArrowFunction === 1) {
-                    var asyncModifier = parseModifiersForArrowFunction();
-                    var expr = parseBinaryExpressionOrHigher(0);
-                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
-                }
-            }
-            return undefined;
-        }
-        function isUnParenthesizedAsyncArrowFunctionWorker() {
-            if (token === 118) {
-                nextToken();
-                if (scanner.hasPrecedingLineBreak() || token === 34) {
-                    return 0;
-                }
-                var expr = parseBinaryExpressionOrHigher(0);
-                if (!scanner.hasPrecedingLineBreak() && expr.kind === 69 && token === 34) {
-                    return 1;
-                }
-            }
-            return 0;
-        }
-        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
-            var node = createNode(180);
-            setModifiers(node, parseModifiersForArrowFunction());
-            var isAsync = !!(node.flags & 256);
-            fillSignature(54, false, isAsync, !allowAmbiguity, node);
-            if (!node.parameters) {
-                return undefined;
-            }
-            if (!allowAmbiguity && token !== 34 && token !== 15) {
-                return undefined;
-            }
-            return node;
-        }
-        function parseArrowFunctionExpressionBody(isAsync) {
-            if (token === 15) {
-                return parseFunctionBlock(false, isAsync, false);
-            }
-            if (token !== 23 &&
-                token !== 87 &&
-                token !== 73 &&
-                isStartOfStatement() &&
-                !isStartOfExpressionStatement()) {
-                return parseFunctionBlock(false, isAsync, true);
-            }
-            return isAsync
-                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
-                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
-        }
-        function parseConditionalExpressionRest(leftOperand) {
-            var questionToken = parseOptionalToken(53);
-            if (!questionToken) {
-                return leftOperand;
-            }
-            var node = createNode(188, leftOperand.pos);
-            node.condition = leftOperand;
-            node.questionToken = questionToken;
-            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
-            node.colonToken = parseExpectedToken(54, false, ts.Diagnostics._0_expected, ts.tokenToString(54));
-            node.whenFalse = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
-        }
-        function parseBinaryExpressionOrHigher(precedence) {
-            var leftOperand = parseUnaryExpressionOrHigher();
-            return parseBinaryExpressionRest(precedence, leftOperand);
-        }
-        function isInOrOfKeyword(t) {
-            return t === 90 || t === 138;
-        }
-        function parseBinaryExpressionRest(precedence, leftOperand) {
-            while (true) {
-                reScanGreaterToken();
-                var newPrecedence = getBinaryOperatorPrecedence();
-                var consumeCurrentOperator = token === 38 ?
-                    newPrecedence >= precedence :
-                    newPrecedence > precedence;
-                if (!consumeCurrentOperator) {
-                    break;
-                }
-                if (token === 90 && inDisallowInContext()) {
-                    break;
-                }
-                if (token === 116) {
-                    if (scanner.hasPrecedingLineBreak()) {
-                        break;
-                    }
-                    else {
-                        nextToken();
-                        leftOperand = makeAsExpression(leftOperand, parseType());
-                    }
-                }
-                else {
-                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
-                }
-            }
-            return leftOperand;
-        }
-        function isBinaryOperator() {
-            if (inDisallowInContext() && token === 90) {
-                return false;
-            }
-            return getBinaryOperatorPrecedence() > 0;
-        }
-        function getBinaryOperatorPrecedence() {
-            switch (token) {
-                case 52:
-                    return 1;
-                case 51:
-                    return 2;
-                case 47:
-                    return 3;
-                case 48:
-                    return 4;
-                case 46:
-                    return 5;
-                case 30:
-                case 31:
-                case 32:
-                case 33:
-                    return 6;
-                case 25:
-                case 27:
-                case 28:
-                case 29:
-                case 91:
-                case 90:
-                case 116:
-                    return 7;
-                case 43:
-                case 44:
-                case 45:
-                    return 8;
-                case 35:
-                case 36:
-                    return 9;
-                case 37:
-                case 39:
-                case 40:
-                    return 10;
-                case 38:
-                    return 11;
-            }
-            return -1;
-        }
-        function makeBinaryExpression(left, operatorToken, right) {
-            var node = createNode(187, left.pos);
-            node.left = left;
-            node.operatorToken = operatorToken;
-            node.right = right;
-            return finishNode(node);
-        }
-        function makeAsExpression(left, right) {
-            var node = createNode(195, left.pos);
-            node.expression = left;
-            node.type = right;
-            return finishNode(node);
-        }
-        function parsePrefixUnaryExpression() {
-            var node = createNode(185);
-            node.operator = token;
-            nextToken();
-            node.operand = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseDeleteExpression() {
-            var node = createNode(181);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseTypeOfExpression() {
-            var node = createNode(182);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseVoidExpression() {
-            var node = createNode(183);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function isAwaitExpression() {
-            if (token === 119) {
-                if (inAwaitContext()) {
-                    return true;
-                }
-                return lookAhead(nextTokenIsIdentifierOnSameLine);
-            }
-            return false;
-        }
-        function parseAwaitExpression() {
-            var node = createNode(184);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseUnaryExpressionOrHigher() {
-            if (isAwaitExpression()) {
-                return parseAwaitExpression();
-            }
-            if (isIncrementExpression()) {
-                var incrementExpression = parseIncrementExpression();
-                return token === 38 ?
-                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), incrementExpression) :
-                    incrementExpression;
-            }
-            var unaryOperator = token;
-            var simpleUnaryExpression = parseSimpleUnaryExpression();
-            if (token === 38) {
-                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
-                if (simpleUnaryExpression.kind === 177) {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
-                }
-                else {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
-                }
-            }
-            return simpleUnaryExpression;
-        }
-        function parseSimpleUnaryExpression() {
-            switch (token) {
-                case 35:
-                case 36:
-                case 50:
-                case 49:
-                    return parsePrefixUnaryExpression();
-                case 78:
-                    return parseDeleteExpression();
-                case 101:
-                    return parseTypeOfExpression();
-                case 103:
-                    return parseVoidExpression();
-                case 25:
-                    return parseTypeAssertion();
-                default:
-                    return parseIncrementExpression();
-            }
-        }
-        function isIncrementExpression() {
-            switch (token) {
-                case 35:
-                case 36:
-                case 50:
-                case 49:
-                case 78:
-                case 101:
-                case 103:
-                    return false;
-                case 25:
-                    if (sourceFile.languageVariant !== 1) {
-                        return false;
-                    }
-                default:
-                    return true;
-            }
-        }
-        function parseIncrementExpression() {
-            if (token === 41 || token === 42) {
-                var node = createNode(185);
-                node.operator = token;
-                nextToken();
-                node.operand = parseLeftHandSideExpressionOrHigher();
-                return finishNode(node);
-            }
-            else if (sourceFile.languageVariant === 1 && token === 25 && lookAhead(nextTokenIsIdentifierOrKeyword)) {
-                return parseJsxElementOrSelfClosingElement(true);
-            }
-            var expression = parseLeftHandSideExpressionOrHigher();
-            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
-            if ((token === 41 || token === 42) && !scanner.hasPrecedingLineBreak()) {
-                var node = createNode(186, expression.pos);
-                node.operand = expression;
-                node.operator = token;
-                nextToken();
-                return finishNode(node);
-            }
-            return expression;
-        }
-        function parseLeftHandSideExpressionOrHigher() {
-            var expression = token === 95
-                ? parseSuperExpression()
-                : parseMemberExpressionOrHigher();
-            return parseCallExpressionRest(expression);
-        }
-        function parseMemberExpressionOrHigher() {
-            var expression = parsePrimaryExpression();
-            return parseMemberExpressionRest(expression);
-        }
-        function parseSuperExpression() {
-            var expression = parseTokenNode();
-            if (token === 17 || token === 21 || token === 19) {
-                return expression;
-            }
-            var node = createNode(172, expression.pos);
-            node.expression = expression;
-            node.dotToken = parseExpectedToken(21, false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
-            node.name = parseRightSideOfDot(true);
-            return finishNode(node);
-        }
-        function tagNamesAreEquivalent(lhs, rhs) {
-            if (lhs.kind !== rhs.kind) {
-                return false;
-            }
-            if (lhs.kind === 69) {
-                return lhs.text === rhs.text;
-            }
-            return lhs.right.text === rhs.right.text &&
-                tagNamesAreEquivalent(lhs.left, rhs.left);
-        }
-        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
-            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
-            var result;
-            if (opening.kind === 243) {
-                var node = createNode(241, opening.pos);
-                node.openingElement = opening;
-                node.children = parseJsxChildren(node.openingElement.tagName);
-                node.closingElement = parseJsxClosingElement(inExpressionContext);
-                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
-                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
-                }
-                result = finishNode(node);
-            }
-            else {
-                ts.Debug.assert(opening.kind === 242);
-                result = opening;
-            }
-            if (inExpressionContext && token === 25) {
-                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(true); });
-                if (invalidElement) {
-                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
-                    var badNode = createNode(187, result.pos);
-                    badNode.end = invalidElement.end;
-                    badNode.left = result;
-                    badNode.right = invalidElement;
-                    badNode.operatorToken = createMissingNode(24, false, undefined);
-                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
-                    return badNode;
-                }
-            }
-            return result;
-        }
-        function parseJsxText() {
-            var node = createNode(244, scanner.getStartPos());
-            token = scanner.scanJsxToken();
-            return finishNode(node);
-        }
-        function parseJsxChild() {
-            switch (token) {
-                case 244:
-                    return parseJsxText();
-                case 15:
-                    return parseJsxExpression(false);
-                case 25:
-                    return parseJsxElementOrSelfClosingElement(false);
-            }
-            ts.Debug.fail("Unknown JSX child kind " + token);
-        }
-        function parseJsxChildren(openingTagName) {
-            var result = [];
-            result.pos = scanner.getStartPos();
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << 14;
-            while (true) {
-                token = scanner.reScanJsxToken();
-                if (token === 26) {
-                    break;
-                }
-                else if (token === 1) {
-                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
-                    break;
-                }
-                result.push(parseJsxChild());
-            }
-            result.end = scanner.getTokenPos();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
-            var fullStart = scanner.getStartPos();
-            parseExpected(25);
-            var tagName = parseJsxElementName();
-            var attributes = parseList(13, parseJsxAttribute);
-            var node;
-            if (token === 27) {
-                node = createNode(243, fullStart);
-                scanJsxText();
-            }
-            else {
-                parseExpected(39);
-                if (inExpressionContext) {
-                    parseExpected(27);
-                }
-                else {
-                    parseExpected(27, undefined, false);
-                    scanJsxText();
-                }
-                node = createNode(242, fullStart);
-            }
-            node.tagName = tagName;
-            node.attributes = attributes;
-            return finishNode(node);
-        }
-        function parseJsxElementName() {
-            scanJsxIdentifier();
-            var elementName = parseIdentifierName();
-            while (parseOptional(21)) {
-                scanJsxIdentifier();
-                var node = createNode(139, elementName.pos);
-                node.left = elementName;
-                node.right = parseIdentifierName();
-                elementName = finishNode(node);
-            }
-            return elementName;
-        }
-        function parseJsxExpression(inExpressionContext) {
-            var node = createNode(248);
-            parseExpected(15);
-            if (token !== 16) {
-                node.expression = parseAssignmentExpressionOrHigher();
-            }
-            if (inExpressionContext) {
-                parseExpected(16);
-            }
-            else {
-                parseExpected(16, undefined, false);
-                scanJsxText();
-            }
-            return finishNode(node);
-        }
-        function parseJsxAttribute() {
-            if (token === 15) {
-                return parseJsxSpreadAttribute();
-            }
-            scanJsxIdentifier();
-            var node = createNode(246);
-            node.name = parseIdentifierName();
-            if (parseOptional(56)) {
-                switch (token) {
-                    case 9:
-                        node.initializer = parseLiteralNode();
-                        break;
-                    default:
-                        node.initializer = parseJsxExpression(true);
-                        break;
-                }
-            }
-            return finishNode(node);
-        }
-        function parseJsxSpreadAttribute() {
-            var node = createNode(247);
-            parseExpected(15);
-            parseExpected(22);
-            node.expression = parseExpression();
-            parseExpected(16);
-            return finishNode(node);
-        }
-        function parseJsxClosingElement(inExpressionContext) {
-            var node = createNode(245);
-            parseExpected(26);
-            node.tagName = parseJsxElementName();
-            if (inExpressionContext) {
-                parseExpected(27);
-            }
-            else {
-                parseExpected(27, undefined, false);
-                scanJsxText();
-            }
-            return finishNode(node);
-        }
-        function parseTypeAssertion() {
-            var node = createNode(177);
-            parseExpected(25);
-            node.type = parseType();
-            parseExpected(27);
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseMemberExpressionRest(expression) {
-            while (true) {
-                var dotToken = parseOptionalToken(21);
-                if (dotToken) {
-                    var propertyAccess = createNode(172, expression.pos);
-                    propertyAccess.expression = expression;
-                    propertyAccess.dotToken = dotToken;
-                    propertyAccess.name = parseRightSideOfDot(true);
-                    expression = finishNode(propertyAccess);
-                    continue;
-                }
-                if (token === 49 && !scanner.hasPrecedingLineBreak()) {
-                    nextToken();
-                    var nonNullExpression = createNode(196, expression.pos);
-                    nonNullExpression.expression = expression;
-                    expression = finishNode(nonNullExpression);
-                    continue;
-                }
-                if (!inDecoratorContext() && parseOptional(19)) {
-                    var indexedAccess = createNode(173, expression.pos);
-                    indexedAccess.expression = expression;
-                    if (token !== 20) {
-                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
-                        if (indexedAccess.argumentExpression.kind === 9 || indexedAccess.argumentExpression.kind === 8) {
-                            var literal = indexedAccess.argumentExpression;
-                            literal.text = internIdentifier(literal.text);
-                        }
-                    }
-                    parseExpected(20);
-                    expression = finishNode(indexedAccess);
-                    continue;
-                }
-                if (token === 11 || token === 12) {
-                    var tagExpression = createNode(176, expression.pos);
-                    tagExpression.tag = expression;
-                    tagExpression.template = token === 11
-                        ? parseLiteralNode()
-                        : parseTemplateExpression();
-                    expression = finishNode(tagExpression);
-                    continue;
-                }
-                return expression;
-            }
-        }
-        function parseCallExpressionRest(expression) {
-            while (true) {
-                expression = parseMemberExpressionRest(expression);
-                if (token === 25) {
-                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
-                    if (!typeArguments) {
-                        return expression;
-                    }
-                    var callExpr = createNode(174, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.typeArguments = typeArguments;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
-                }
-                else if (token === 17) {
-                    var callExpr = createNode(174, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
-                }
-                return expression;
-            }
-        }
-        function parseArgumentList() {
-            parseExpected(17);
-            var result = parseDelimitedList(11, parseArgumentExpression);
-            parseExpected(18);
-            return result;
-        }
-        function parseTypeArgumentsInExpression() {
-            if (!parseOptional(25)) {
-                return undefined;
-            }
-            var typeArguments = parseDelimitedList(18, parseType);
-            if (!parseExpected(27)) {
-                return undefined;
-            }
-            return typeArguments && canFollowTypeArgumentsInExpression()
-                ? typeArguments
-                : undefined;
-        }
-        function canFollowTypeArgumentsInExpression() {
-            switch (token) {
-                case 17:
-                case 21:
-                case 18:
-                case 20:
-                case 54:
-                case 23:
-                case 53:
-                case 30:
-                case 32:
-                case 31:
-                case 33:
-                case 51:
-                case 52:
-                case 48:
-                case 46:
-                case 47:
-                case 16:
-                case 1:
-                    return true;
-                case 24:
-                case 15:
-                default:
-                    return false;
-            }
-        }
-        function parsePrimaryExpression() {
-            switch (token) {
-                case 8:
-                case 9:
-                case 11:
-                    return parseLiteralNode();
-                case 97:
-                case 95:
-                case 93:
-                case 99:
-                case 84:
-                    return parseTokenNode();
-                case 17:
-                    return parseParenthesizedExpression();
-                case 19:
-                    return parseArrayLiteralExpression();
-                case 15:
-                    return parseObjectLiteralExpression();
-                case 118:
-                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
-                        break;
-                    }
-                    return parseFunctionExpression();
-                case 73:
-                    return parseClassExpression();
-                case 87:
-                    return parseFunctionExpression();
-                case 92:
-                    return parseNewExpression();
-                case 39:
-                case 61:
-                    if (reScanSlashToken() === 10) {
-                        return parseLiteralNode();
-                    }
-                    break;
-                case 12:
-                    return parseTemplateExpression();
-            }
-            return parseIdentifier(ts.Diagnostics.Expression_expected);
-        }
-        function parseParenthesizedExpression() {
-            var node = createNode(178);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            return finishNode(node);
-        }
-        function parseSpreadElement() {
-            var node = createNode(191);
-            parseExpected(22);
-            node.expression = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
-        }
-        function parseArgumentOrArrayLiteralElement() {
-            return token === 22 ? parseSpreadElement() :
-                token === 24 ? createNode(193) :
-                    parseAssignmentExpressionOrHigher();
-        }
-        function parseArgumentExpression() {
-            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
-        }
-        function parseArrayLiteralExpression() {
-            var node = createNode(170);
-            parseExpected(19);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.elements = parseDelimitedList(15, parseArgumentOrArrayLiteralElement);
-            parseExpected(20);
-            return finishNode(node);
-        }
-        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
-            if (parseContextualModifier(123)) {
-                return addJSDocComment(parseAccessorDeclaration(149, fullStart, decorators, modifiers));
-            }
-            else if (parseContextualModifier(131)) {
-                return parseAccessorDeclaration(150, fullStart, decorators, modifiers);
-            }
-            return undefined;
-        }
-        function parseObjectLiteralElement() {
-            var fullStart = scanner.getStartPos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
-            }
-            var asteriskToken = parseOptionalToken(37);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            var questionToken = parseOptionalToken(53);
-            if (asteriskToken || token === 17 || token === 25) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
-            }
-            var isShorthandPropertyAssignment = tokenIsIdentifier && (token === 24 || token === 16 || token === 56);
-            if (isShorthandPropertyAssignment) {
-                var shorthandDeclaration = createNode(254, fullStart);
-                shorthandDeclaration.name = propertyName;
-                shorthandDeclaration.questionToken = questionToken;
-                var equalsToken = parseOptionalToken(56);
-                if (equalsToken) {
-                    shorthandDeclaration.equalsToken = equalsToken;
-                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                }
-                return addJSDocComment(finishNode(shorthandDeclaration));
-            }
-            else {
-                var propertyAssignment = createNode(253, fullStart);
-                propertyAssignment.modifiers = modifiers;
-                propertyAssignment.name = propertyName;
-                propertyAssignment.questionToken = questionToken;
-                parseExpected(54);
-                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                return addJSDocComment(finishNode(propertyAssignment));
-            }
-        }
-        function parseObjectLiteralExpression() {
-            var node = createNode(171);
-            parseExpected(15);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.properties = parseDelimitedList(12, parseObjectLiteralElement, true);
-            parseExpected(16);
-            return finishNode(node);
-        }
-        function parseFunctionExpression() {
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(false);
-            }
-            var node = createNode(179);
-            setModifiers(node, parseModifiers());
-            parseExpected(87);
-            node.asteriskToken = parseOptionalToken(37);
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = !!(node.flags & 256);
-            node.name =
-                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
-                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
-                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
-                            parseOptionalIdentifier();
-            fillSignature(54, isGenerator, isAsync, false, node);
-            node.body = parseFunctionBlock(isGenerator, isAsync, false);
-            if (saveDecoratorContext) {
-                setDecoratorContext(true);
-            }
-            return addJSDocComment(finishNode(node));
-        }
-        function parseOptionalIdentifier() {
-            return isIdentifier() ? parseIdentifier() : undefined;
-        }
-        function parseNewExpression() {
-            var node = createNode(175);
-            parseExpected(92);
-            node.expression = parseMemberExpressionOrHigher();
-            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
-            if (node.typeArguments || token === 17) {
-                node.arguments = parseArgumentList();
-            }
-            return finishNode(node);
-        }
-        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
-            var node = createNode(199);
-            if (parseExpected(15, diagnosticMessage) || ignoreMissingOpenBrace) {
-                node.statements = parseList(1, parseStatement);
-                parseExpected(16);
-            }
-            else {
-                node.statements = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
-            var savedYieldContext = inYieldContext();
-            setYieldContext(allowYield);
-            var savedAwaitContext = inAwaitContext();
-            setAwaitContext(allowAwait);
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(false);
-            }
-            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
-            if (saveDecoratorContext) {
-                setDecoratorContext(true);
-            }
-            setYieldContext(savedYieldContext);
-            setAwaitContext(savedAwaitContext);
-            return block;
-        }
-        function parseEmptyStatement() {
-            var node = createNode(201);
-            parseExpected(23);
-            return finishNode(node);
-        }
-        function parseIfStatement() {
-            var node = createNode(203);
-            parseExpected(88);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            node.thenStatement = parseStatement();
-            node.elseStatement = parseOptional(80) ? parseStatement() : undefined;
-            return finishNode(node);
-        }
-        function parseDoStatement() {
-            var node = createNode(204);
-            parseExpected(79);
-            node.statement = parseStatement();
-            parseExpected(104);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            parseOptional(23);
-            return finishNode(node);
-        }
-        function parseWhileStatement() {
-            var node = createNode(205);
-            parseExpected(104);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            node.statement = parseStatement();
-            return finishNode(node);
-        }
-        function parseForOrForInOrForOfStatement() {
-            var pos = getNodePos();
-            parseExpected(86);
-            parseExpected(17);
-            var initializer = undefined;
-            if (token !== 23) {
-                if (token === 102 || token === 108 || token === 74) {
-                    initializer = parseVariableDeclarationList(true);
-                }
-                else {
-                    initializer = disallowInAnd(parseExpression);
-                }
-            }
-            var forOrForInOrForOfStatement;
-            if (parseOptional(90)) {
-                var forInStatement = createNode(207, pos);
-                forInStatement.initializer = initializer;
-                forInStatement.expression = allowInAnd(parseExpression);
-                parseExpected(18);
-                forOrForInOrForOfStatement = forInStatement;
-            }
-            else if (parseOptional(138)) {
-                var forOfStatement = createNode(208, pos);
-                forOfStatement.initializer = initializer;
-                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
-                parseExpected(18);
-                forOrForInOrForOfStatement = forOfStatement;
-            }
-            else {
-                var forStatement = createNode(206, pos);
-                forStatement.initializer = initializer;
-                parseExpected(23);
-                if (token !== 23 && token !== 18) {
-                    forStatement.condition = allowInAnd(parseExpression);
-                }
-                parseExpected(23);
-                if (token !== 18) {
-                    forStatement.incrementor = allowInAnd(parseExpression);
-                }
-                parseExpected(18);
-                forOrForInOrForOfStatement = forStatement;
-            }
-            forOrForInOrForOfStatement.statement = parseStatement();
-            return finishNode(forOrForInOrForOfStatement);
-        }
-        function parseBreakOrContinueStatement(kind) {
-            var node = createNode(kind);
-            parseExpected(kind === 210 ? 70 : 75);
-            if (!canParseSemicolon()) {
-                node.label = parseIdentifier();
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseReturnStatement() {
-            var node = createNode(211);
-            parseExpected(94);
-            if (!canParseSemicolon()) {
-                node.expression = allowInAnd(parseExpression);
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseWithStatement() {
-            var node = createNode(212);
-            parseExpected(105);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            node.statement = parseStatement();
-            return finishNode(node);
-        }
-        function parseCaseClause() {
-            var node = createNode(249);
-            parseExpected(71);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(54);
-            node.statements = parseList(3, parseStatement);
-            return finishNode(node);
-        }
-        function parseDefaultClause() {
-            var node = createNode(250);
-            parseExpected(77);
-            parseExpected(54);
-            node.statements = parseList(3, parseStatement);
-            return finishNode(node);
-        }
-        function parseCaseOrDefaultClause() {
-            return token === 71 ? parseCaseClause() : parseDefaultClause();
-        }
-        function parseSwitchStatement() {
-            var node = createNode(213);
-            parseExpected(96);
-            parseExpected(17);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18);
-            var caseBlock = createNode(227, scanner.getStartPos());
-            parseExpected(15);
-            caseBlock.clauses = parseList(2, parseCaseOrDefaultClause);
-            parseExpected(16);
-            node.caseBlock = finishNode(caseBlock);
-            return finishNode(node);
-        }
-        function parseThrowStatement() {
-            var node = createNode(215);
-            parseExpected(98);
-            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseTryStatement() {
-            var node = createNode(216);
-            parseExpected(100);
-            node.tryBlock = parseBlock(false);
-            node.catchClause = token === 72 ? parseCatchClause() : undefined;
-            if (!node.catchClause || token === 85) {
-                parseExpected(85);
-                node.finallyBlock = parseBlock(false);
-            }
-            return finishNode(node);
-        }
-        function parseCatchClause() {
-            var result = createNode(252);
-            parseExpected(72);
-            if (parseExpected(17)) {
-                result.variableDeclaration = parseVariableDeclaration();
-            }
-            parseExpected(18);
-            result.block = parseBlock(false);
-            return finishNode(result);
-        }
-        function parseDebuggerStatement() {
-            var node = createNode(217);
-            parseExpected(76);
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseExpressionOrLabeledStatement() {
-            var fullStart = scanner.getStartPos();
-            var expression = allowInAnd(parseExpression);
-            if (expression.kind === 69 && parseOptional(54)) {
-                var labeledStatement = createNode(214, fullStart);
-                labeledStatement.label = expression;
-                labeledStatement.statement = parseStatement();
-                return addJSDocComment(finishNode(labeledStatement));
-            }
-            else {
-                var expressionStatement = createNode(202, fullStart);
-                expressionStatement.expression = expression;
-                parseSemicolon();
-                return addJSDocComment(finishNode(expressionStatement));
-            }
-        }
-        function nextTokenIsIdentifierOrKeywordOnSameLine() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token) && !scanner.hasPrecedingLineBreak();
-        }
-        function nextTokenIsFunctionKeywordOnSameLine() {
-            nextToken();
-            return token === 87 && !scanner.hasPrecedingLineBreak();
-        }
-        function nextTokenIsIdentifierOrKeywordOrNumberOnSameLine() {
-            nextToken();
-            return (ts.tokenIsIdentifierOrKeyword(token) || token === 8) && !scanner.hasPrecedingLineBreak();
-        }
-        function isDeclaration() {
-            while (true) {
-                switch (token) {
-                    case 102:
-                    case 108:
-                    case 74:
-                    case 87:
-                    case 73:
-                    case 81:
-                        return true;
-                    case 107:
-                    case 134:
-                        return nextTokenIsIdentifierOnSameLine();
-                    case 125:
-                    case 126:
-                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
-                    case 115:
-                    case 118:
-                    case 122:
-                    case 110:
-                    case 111:
-                    case 112:
-                    case 128:
-                        nextToken();
-                        if (scanner.hasPrecedingLineBreak()) {
-                            return false;
-                        }
-                        continue;
-                    case 137:
-                        nextToken();
-                        return token === 15 || token === 69 || token === 82;
-                    case 89:
-                        nextToken();
-                        return token === 9 || token === 37 ||
-                            token === 15 || ts.tokenIsIdentifierOrKeyword(token);
-                    case 82:
-                        nextToken();
-                        if (token === 56 || token === 37 ||
-                            token === 15 || token === 77 ||
-                            token === 116) {
-                            return true;
-                        }
-                        continue;
-                    case 113:
-                        nextToken();
-                        continue;
-                    default:
-                        return false;
-                }
-            }
-        }
-        function isStartOfDeclaration() {
-            return lookAhead(isDeclaration);
-        }
-        function isStartOfStatement() {
-            switch (token) {
-                case 55:
-                case 23:
-                case 15:
-                case 102:
-                case 108:
-                case 87:
-                case 73:
-                case 81:
-                case 88:
-                case 79:
-                case 104:
-                case 86:
-                case 75:
-                case 70:
-                case 94:
-                case 105:
-                case 96:
-                case 98:
-                case 100:
-                case 76:
-                case 72:
-                case 85:
-                    return true;
-                case 74:
-                case 82:
-                case 89:
-                    return isStartOfDeclaration();
-                case 118:
-                case 122:
-                case 107:
-                case 125:
-                case 126:
-                case 134:
-                case 137:
-                    return true;
-                case 112:
-                case 110:
-                case 111:
-                case 113:
-                case 128:
-                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                default:
-                    return isStartOfExpression();
-            }
-        }
-        function nextTokenIsIdentifierOrStartOfDestructuring() {
-            nextToken();
-            return isIdentifier() || token === 15 || token === 19;
-        }
-        function isLetDeclaration() {
-            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
-        }
-        function parseStatement() {
-            switch (token) {
-                case 23:
-                    return parseEmptyStatement();
-                case 15:
-                    return parseBlock(false);
-                case 102:
-                    return parseVariableStatement(scanner.getStartPos(), undefined, undefined);
-                case 108:
-                    if (isLetDeclaration()) {
-                        return parseVariableStatement(scanner.getStartPos(), undefined, undefined);
-                    }
-                    break;
-                case 87:
-                    return parseFunctionDeclaration(scanner.getStartPos(), undefined, undefined);
-                case 73:
-                    return parseClassDeclaration(scanner.getStartPos(), undefined, undefined);
-                case 88:
-                    return parseIfStatement();
-                case 79:
-                    return parseDoStatement();
-                case 104:
-                    return parseWhileStatement();
-                case 86:
-                    return parseForOrForInOrForOfStatement();
-                case 75:
-                    return parseBreakOrContinueStatement(209);
-                case 70:
-                    return parseBreakOrContinueStatement(210);
-                case 94:
-                    return parseReturnStatement();
-                case 105:
-                    return parseWithStatement();
-                case 96:
-                    return parseSwitchStatement();
-                case 98:
-                    return parseThrowStatement();
-                case 100:
-                case 72:
-                case 85:
-                    return parseTryStatement();
-                case 76:
-                    return parseDebuggerStatement();
-                case 55:
-                    return parseDeclaration();
-                case 118:
-                case 107:
-                case 134:
-                case 125:
-                case 126:
-                case 122:
-                case 74:
-                case 81:
-                case 82:
-                case 89:
-                case 110:
-                case 111:
-                case 112:
-                case 115:
-                case 113:
-                case 128:
-                case 137:
-                    if (isStartOfDeclaration()) {
-                        return parseDeclaration();
-                    }
-                    break;
-            }
-            return parseExpressionOrLabeledStatement();
-        }
-        function parseDeclaration() {
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            switch (token) {
-                case 102:
-                case 108:
-                case 74:
-                    return parseVariableStatement(fullStart, decorators, modifiers);
-                case 87:
-                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
-                case 73:
-                    return parseClassDeclaration(fullStart, decorators, modifiers);
-                case 107:
-                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
-                case 134:
-                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
-                case 81:
-                    return parseEnumDeclaration(fullStart, decorators, modifiers);
-                case 137:
-                case 125:
-                case 126:
-                    return parseModuleDeclaration(fullStart, decorators, modifiers);
-                case 89:
-                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
-                case 82:
-                    nextToken();
-                    switch (token) {
-                        case 77:
-                        case 56:
-                            return parseExportAssignment(fullStart, decorators, modifiers);
-                        case 116:
-                            return parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers);
-                        default:
-                            return parseExportDeclaration(fullStart, decorators, modifiers);
-                    }
-                default:
-                    if (decorators || modifiers) {
-                        var node = createMissingNode(239, true, ts.Diagnostics.Declaration_expected);
-                        node.pos = fullStart;
-                        node.decorators = decorators;
-                        setModifiers(node, modifiers);
-                        return finishNode(node);
-                    }
-            }
-        }
-        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token === 9);
-        }
-        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
-            if (token !== 15 && canParseSemicolon()) {
-                parseSemicolon();
-                return;
-            }
-            return parseFunctionBlock(isGenerator, isAsync, false, diagnosticMessage);
-        }
-        function parseArrayBindingElement() {
-            if (token === 24) {
-                return createNode(193);
-            }
-            var node = createNode(169);
-            node.dotDotDotToken = parseOptionalToken(22);
-            node.name = parseIdentifierOrPattern();
-            node.initializer = parseBindingElementInitializer(false);
-            return finishNode(node);
-        }
-        function parseObjectBindingElement() {
-            var node = createNode(169);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            if (tokenIsIdentifier && token !== 54) {
-                node.name = propertyName;
-            }
-            else {
-                parseExpected(54);
-                node.propertyName = propertyName;
-                node.name = parseIdentifierOrPattern();
-            }
-            node.initializer = parseBindingElementInitializer(false);
-            return finishNode(node);
-        }
-        function parseObjectBindingPattern() {
-            var node = createNode(167);
-            parseExpected(15);
-            node.elements = parseDelimitedList(9, parseObjectBindingElement);
-            parseExpected(16);
-            return finishNode(node);
-        }
-        function parseArrayBindingPattern() {
-            var node = createNode(168);
-            parseExpected(19);
-            node.elements = parseDelimitedList(10, parseArrayBindingElement);
-            parseExpected(20);
-            return finishNode(node);
-        }
-        function isIdentifierOrPattern() {
-            return token === 15 || token === 19 || isIdentifier();
-        }
-        function parseIdentifierOrPattern() {
-            if (token === 19) {
-                return parseArrayBindingPattern();
-            }
-            if (token === 15) {
-                return parseObjectBindingPattern();
-            }
-            return parseIdentifier();
-        }
-        function parseVariableDeclaration() {
-            var node = createNode(218);
-            node.name = parseIdentifierOrPattern();
-            node.type = parseTypeAnnotation();
-            if (!isInOrOfKeyword(token)) {
-                node.initializer = parseInitializer(false);
-            }
-            return finishNode(node);
-        }
-        function parseVariableDeclarationList(inForStatementInitializer) {
-            var node = createNode(219);
-            switch (token) {
-                case 102:
-                    break;
-                case 108:
-                    node.flags |= 1024;
-                    break;
-                case 74:
-                    node.flags |= 2048;
-                    break;
-                default:
-                    ts.Debug.fail();
-            }
-            nextToken();
-            if (token === 138 && lookAhead(canFollowContextualOfKeyword)) {
-                node.declarations = createMissingList();
-            }
-            else {
-                var savedDisallowIn = inDisallowInContext();
-                setDisallowInContext(inForStatementInitializer);
-                node.declarations = parseDelimitedList(8, parseVariableDeclaration);
-                setDisallowInContext(savedDisallowIn);
-            }
-            return finishNode(node);
-        }
-        function canFollowContextualOfKeyword() {
-            return nextTokenIsIdentifier() && nextToken() === 18;
-        }
-        function parseVariableStatement(fullStart, decorators, modifiers) {
-            var node = createNode(200, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.declarationList = parseVariableDeclarationList(false);
-            parseSemicolon();
-            return addJSDocComment(finishNode(node));
-        }
-        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(220, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(87);
-            node.asteriskToken = parseOptionalToken(37);
-            node.name = node.flags & 512 ? parseOptionalIdentifier() : parseIdentifier();
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = !!(node.flags & 256);
-            fillSignature(54, isGenerator, isAsync, false, node);
-            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
-        }
-        function parseConstructorDeclaration(pos, decorators, modifiers) {
-            var node = createNode(148, pos);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(121);
-            fillSignature(54, false, false, false, node);
-            node.body = parseFunctionBlockOrSemicolon(false, false, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
-        }
-        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
-            var method = createNode(147, fullStart);
-            method.decorators = decorators;
-            setModifiers(method, modifiers);
-            method.asteriskToken = asteriskToken;
-            method.name = name;
-            method.questionToken = questionToken;
-            var isGenerator = !!asteriskToken;
-            var isAsync = !!(method.flags & 256);
-            fillSignature(54, isGenerator, isAsync, false, method);
-            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
-            return addJSDocComment(finishNode(method));
-        }
-        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
-            var property = createNode(145, fullStart);
-            property.decorators = decorators;
-            setModifiers(property, modifiers);
-            property.name = name;
-            property.questionToken = questionToken;
-            property.type = parseTypeAnnotation();
-            property.initializer = modifiers && modifiers.flags & 32
-                ? allowInAnd(parseNonParameterInitializer)
-                : doOutsideOfContext(8388608 | 4194304, parseNonParameterInitializer);
-            parseSemicolon();
-            return finishNode(property);
-        }
-        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
-            var asteriskToken = parseOptionalToken(37);
-            var name = parsePropertyName();
-            var questionToken = parseOptionalToken(53);
-            if (asteriskToken || token === 17 || token === 25) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
-            }
-            else {
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
-            }
-        }
-        function parseNonParameterInitializer() {
-            return parseInitializer(false);
-        }
-        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.name = parsePropertyName();
-            fillSignature(54, false, false, false, node);
-            node.body = parseFunctionBlockOrSemicolon(false, false);
-            return finishNode(node);
-        }
-        function isClassMemberModifier(idToken) {
-            switch (idToken) {
-                case 112:
-                case 110:
-                case 111:
-                case 113:
-                case 128:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-        function isClassMemberStart() {
-            var idToken;
-            if (token === 55) {
-                return true;
-            }
-            while (ts.isModifierKind(token)) {
-                idToken = token;
-                if (isClassMemberModifier(idToken)) {
-                    return true;
-                }
-                nextToken();
-            }
-            if (token === 37) {
-                return true;
-            }
-            if (isLiteralPropertyName()) {
-                idToken = token;
-                nextToken();
-            }
-            if (token === 19) {
-                return true;
-            }
-            if (idToken !== undefined) {
-                if (!ts.isKeyword(idToken) || idToken === 131 || idToken === 123) {
-                    return true;
-                }
-                switch (token) {
-                    case 17:
-                    case 25:
-                    case 54:
-                    case 56:
-                    case 53:
-                        return true;
-                    default:
-                        return canParseSemicolon();
-                }
-            }
-            return false;
-        }
-        function parseDecorators() {
-            var decorators;
-            while (true) {
-                var decoratorStart = getNodePos();
-                if (!parseOptional(55)) {
-                    break;
-                }
-                if (!decorators) {
-                    decorators = [];
-                    decorators.pos = decoratorStart;
-                }
-                var decorator = createNode(143, decoratorStart);
-                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
-                decorators.push(finishNode(decorator));
-            }
-            if (decorators) {
-                decorators.end = getNodeEnd();
-            }
-            return decorators;
-        }
-        function parseModifiers(permitInvalidConstAsModifier) {
-            var flags = 0;
-            var modifiers;
-            while (true) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token;
-                if (token === 74 && permitInvalidConstAsModifier) {
-                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
-                        break;
-                    }
-                }
-                else {
-                    if (!parseAnyContextualModifier()) {
-                        break;
-                    }
-                }
-                if (!modifiers) {
-                    modifiers = [];
-                    modifiers.pos = modifierStart;
-                }
-                flags |= ts.modifierToFlag(modifierKind);
-                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
-            }
-            if (modifiers) {
-                modifiers.flags = flags;
-                modifiers.end = scanner.getStartPos();
-            }
-            return modifiers;
-        }
-        function parseModifiersForArrowFunction() {
-            var flags = 0;
-            var modifiers;
-            if (token === 118) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token;
-                nextToken();
-                modifiers = [];
-                modifiers.pos = modifierStart;
-                flags |= ts.modifierToFlag(modifierKind);
-                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
-                modifiers.flags = flags;
-                modifiers.end = scanner.getStartPos();
-            }
-            return modifiers;
-        }
-        function parseClassElement() {
-            if (token === 23) {
-                var result = createNode(198);
-                nextToken();
-                return finishNode(result);
-            }
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers(true);
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
-            }
-            if (token === 121) {
-                return parseConstructorDeclaration(fullStart, decorators, modifiers);
-            }
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
-            }
-            if (ts.tokenIsIdentifierOrKeyword(token) ||
-                token === 9 ||
-                token === 8 ||
-                token === 37 ||
-                token === 19) {
-                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
-            }
-            if (decorators || modifiers) {
-                var name_7 = createMissingNode(69, true, ts.Diagnostics.Declaration_expected);
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_7, undefined);
-            }
-            ts.Debug.fail("Should not have attempted to parse class member declaration.");
-        }
-        function parseClassExpression() {
-            return parseClassDeclarationOrExpression(scanner.getStartPos(), undefined, undefined, 192);
-        }
-        function parseClassDeclaration(fullStart, decorators, modifiers) {
-            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 221);
-        }
-        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(73);
-            node.name = parseNameOfClassDeclarationOrExpression();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(true);
-            if (parseExpected(15)) {
-                node.members = parseClassMembers();
-                parseExpected(16);
-            }
-            else {
-                node.members = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseNameOfClassDeclarationOrExpression() {
-            return isIdentifier() && !isImplementsClause()
-                ? parseIdentifier()
-                : undefined;
-        }
-        function isImplementsClause() {
-            return token === 106 && lookAhead(nextTokenIsIdentifierOrKeyword);
-        }
-        function parseHeritageClauses(isClassHeritageClause) {
-            if (isHeritageClause()) {
-                return parseList(20, parseHeritageClause);
-            }
-            return undefined;
-        }
-        function parseHeritageClause() {
-            if (token === 83 || token === 106) {
-                var node = createNode(251);
-                node.token = token;
-                nextToken();
-                node.types = parseDelimitedList(7, parseExpressionWithTypeArguments);
-                return finishNode(node);
-            }
-            return undefined;
-        }
-        function parseExpressionWithTypeArguments() {
-            var node = createNode(194);
-            node.expression = parseLeftHandSideExpressionOrHigher();
-            if (token === 25) {
-                node.typeArguments = parseBracketedList(18, parseType, 25, 27);
-            }
-            return finishNode(node);
-        }
-        function isHeritageClause() {
-            return token === 83 || token === 106;
-        }
-        function parseClassMembers() {
-            return parseList(5, parseClassElement);
-        }
-        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(222, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(107);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(false);
-            node.members = parseObjectTypeMembers();
-            return finishNode(node);
-        }
-        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(223, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(134);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            parseExpected(56);
-            node.type = parseType();
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseEnumMember() {
-            var node = createNode(255, scanner.getStartPos());
-            node.name = parsePropertyName();
-            node.initializer = allowInAnd(parseNonParameterInitializer);
-            return finishNode(node);
-        }
-        function parseEnumDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(224, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(81);
-            node.name = parseIdentifier();
-            if (parseExpected(15)) {
-                node.members = parseDelimitedList(6, parseEnumMember);
-                parseExpected(16);
-            }
-            else {
-                node.members = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseModuleBlock() {
-            var node = createNode(226, scanner.getStartPos());
-            if (parseExpected(15)) {
-                node.statements = parseList(1, parseStatement);
-                parseExpected(16);
-            }
-            else {
-                node.statements = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
-            var node = createNode(225, fullStart);
-            var namespaceFlag = flags & 4096;
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.flags |= flags;
-            node.name = parseIdentifier();
-            node.body = parseOptional(21)
-                ? parseModuleOrNamespaceDeclaration(getNodePos(), undefined, undefined, 1 | namespaceFlag)
-                : parseModuleBlock();
-            return finishNode(node);
-        }
-        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(225, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (token === 137) {
-                node.name = parseIdentifier();
-                node.flags |= 131072;
-            }
-            else {
-                node.name = parseLiteralNode(true);
-            }
-            node.body = parseModuleBlock();
-            return finishNode(node);
-        }
-        function parseModuleDeclaration(fullStart, decorators, modifiers) {
-            var flags = modifiers ? modifiers.flags : 0;
-            if (token === 137) {
-                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
-            }
-            else if (parseOptional(126)) {
-                flags |= 4096;
-            }
-            else {
-                parseExpected(125);
-                if (token === 9) {
-                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
-                }
-            }
-            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
-        }
-        function isExternalModuleReference() {
-            return token === 129 &&
-                lookAhead(nextTokenIsOpenParen);
-        }
-        function nextTokenIsOpenParen() {
-            return nextToken() === 17;
-        }
-        function nextTokenIsSlash() {
-            return nextToken() === 39;
-        }
-        function parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers) {
-            var exportDeclaration = createNode(228, fullStart);
-            exportDeclaration.decorators = decorators;
-            exportDeclaration.modifiers = modifiers;
-            parseExpected(116);
-            parseExpected(126);
-            exportDeclaration.name = parseIdentifier();
-            parseExpected(23);
-            return finishNode(exportDeclaration);
-        }
-        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
-            parseExpected(89);
-            var afterImportPos = scanner.getStartPos();
-            var identifier;
-            if (isIdentifier()) {
-                identifier = parseIdentifier();
-                if (token !== 24 && token !== 136) {
-                    var importEqualsDeclaration = createNode(229, fullStart);
-                    importEqualsDeclaration.decorators = decorators;
-                    setModifiers(importEqualsDeclaration, modifiers);
-                    importEqualsDeclaration.name = identifier;
-                    parseExpected(56);
-                    importEqualsDeclaration.moduleReference = parseModuleReference();
-                    parseSemicolon();
-                    return finishNode(importEqualsDeclaration);
-                }
-            }
-            var importDeclaration = createNode(230, fullStart);
-            importDeclaration.decorators = decorators;
-            setModifiers(importDeclaration, modifiers);
-            if (identifier ||
-                token === 37 ||
-                token === 15) {
-                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
-                parseExpected(136);
-            }
-            importDeclaration.moduleSpecifier = parseModuleSpecifier();
-            parseSemicolon();
-            return finishNode(importDeclaration);
-        }
-        function parseImportClause(identifier, fullStart) {
-            var importClause = createNode(231, fullStart);
-            if (identifier) {
-                importClause.name = identifier;
-            }
-            if (!importClause.name ||
-                parseOptional(24)) {
-                importClause.namedBindings = token === 37 ? parseNamespaceImport() : parseNamedImportsOrExports(233);
-            }
-            return finishNode(importClause);
-        }
-        function parseModuleReference() {
-            return isExternalModuleReference()
-                ? parseExternalModuleReference()
-                : parseEntityName(false);
-        }
-        function parseExternalModuleReference() {
-            var node = createNode(240);
-            parseExpected(129);
-            parseExpected(17);
-            node.expression = parseModuleSpecifier();
-            parseExpected(18);
-            return finishNode(node);
-        }
-        function parseModuleSpecifier() {
-            if (token === 9) {
-                var result = parseLiteralNode();
-                internIdentifier(result.text);
-                return result;
-            }
-            else {
-                return parseExpression();
-            }
-        }
-        function parseNamespaceImport() {
-            var namespaceImport = createNode(232);
-            parseExpected(37);
-            parseExpected(116);
-            namespaceImport.name = parseIdentifier();
-            return finishNode(namespaceImport);
-        }
-        function parseNamedImportsOrExports(kind) {
-            var node = createNode(kind);
-            node.elements = parseBracketedList(21, kind === 233 ? parseImportSpecifier : parseExportSpecifier, 15, 16);
-            return finishNode(node);
-        }
-        function parseExportSpecifier() {
-            return parseImportOrExportSpecifier(238);
-        }
-        function parseImportSpecifier() {
-            return parseImportOrExportSpecifier(234);
-        }
-        function parseImportOrExportSpecifier(kind) {
-            var node = createNode(kind);
-            var checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
-            var checkIdentifierStart = scanner.getTokenPos();
-            var checkIdentifierEnd = scanner.getTextPos();
-            var identifierName = parseIdentifierName();
-            if (token === 116) {
-                node.propertyName = identifierName;
-                parseExpected(116);
-                checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
-                checkIdentifierStart = scanner.getTokenPos();
-                checkIdentifierEnd = scanner.getTextPos();
-                node.name = parseIdentifierName();
-            }
-            else {
-                node.name = identifierName;
-            }
-            if (kind === 234 && checkIdentifierIsKeyword) {
-                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
-            }
-            return finishNode(node);
-        }
-        function parseExportDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(236, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (parseOptional(37)) {
-                parseExpected(136);
-                node.moduleSpecifier = parseModuleSpecifier();
-            }
-            else {
-                node.exportClause = parseNamedImportsOrExports(237);
-                if (token === 136 || (token === 9 && !scanner.hasPrecedingLineBreak())) {
-                    parseExpected(136);
-                    node.moduleSpecifier = parseModuleSpecifier();
-                }
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseExportAssignment(fullStart, decorators, modifiers) {
-            var node = createNode(235, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (parseOptional(56)) {
-                node.isExportEquals = true;
-            }
-            else {
-                parseExpected(77);
-            }
-            node.expression = parseAssignmentExpressionOrHigher();
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function processReferenceComments(sourceFile) {
-            var triviaScanner = ts.createScanner(sourceFile.languageVersion, false, 0, sourceText);
-            var referencedFiles = [];
-            var typeReferenceDirectives = [];
-            var amdDependencies = [];
-            var amdModuleName;
-            while (true) {
-                var kind = triviaScanner.scan();
-                if (kind !== 2) {
-                    if (ts.isTrivia(kind)) {
-                        continue;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                var range = { pos: triviaScanner.getTokenPos(), end: triviaScanner.getTextPos(), kind: triviaScanner.getToken() };
-                var comment = sourceText.substring(range.pos, range.end);
-                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
-                if (referencePathMatchResult) {
-                    var fileReference = referencePathMatchResult.fileReference;
-                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
-                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
-                    if (fileReference) {
-                        if (referencePathMatchResult.isTypeReferenceDirective) {
-                            typeReferenceDirectives.push(fileReference);
-                        }
-                        else {
-                            referencedFiles.push(fileReference);
-                        }
-                    }
-                    if (diagnosticMessage) {
-                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
-                    }
-                }
-                else {
-                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
-                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
-                    if (amdModuleNameMatchResult) {
-                        if (amdModuleName) {
-                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
-                        }
-                        amdModuleName = amdModuleNameMatchResult[2];
-                    }
-                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
-                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
-                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
-                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
-                    if (amdDependencyMatchResult) {
-                        var pathMatchResult = pathRegex.exec(comment);
-                        var nameMatchResult = nameRegex.exec(comment);
-                        if (pathMatchResult) {
-                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
-                            amdDependencies.push(amdDependency);
-                        }
-                    }
-                }
-            }
-            sourceFile.referencedFiles = referencedFiles;
-            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
-            sourceFile.amdDependencies = amdDependencies;
-            sourceFile.moduleName = amdModuleName;
-        }
-        function setExternalModuleIndicator(sourceFile) {
-            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
-                return node.flags & 1
-                    || node.kind === 229 && node.moduleReference.kind === 240
-                    || node.kind === 230
-                    || node.kind === 235
-                    || node.kind === 236
-                    ? node
-                    : undefined;
-            });
-        }
-        var JSDocParser;
-        (function (JSDocParser) {
-            function isJSDocType() {
-                switch (token) {
-                    case 37:
-                    case 53:
-                    case 17:
-                    case 19:
-                    case 49:
-                    case 15:
-                    case 87:
-                    case 22:
-                    case 92:
-                    case 97:
-                        return true;
-                }
-                return ts.tokenIsIdentifierOrKeyword(token);
-            }
-            JSDocParser.isJSDocType = isJSDocType;
-            function parseJSDocTypeExpressionForTests(content, start, length) {
-                initializeState("file.js", content, 2, undefined, 1);
-                scanner.setText(content, start, length);
-                token = scanner.scan();
-                var jsDocTypeExpression = parseJSDocTypeExpression();
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
-            }
-            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-            function parseJSDocTypeExpression() {
-                var result = createNode(257, scanner.getTokenPos());
-                parseExpected(15);
-                result.type = parseJSDocTopLevelType();
-                parseExpected(16);
-                fixupParentReferences(result);
-                return finishNode(result);
-            }
-            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
-            function parseJSDocTopLevelType() {
-                var type = parseJSDocType();
-                if (token === 47) {
-                    var unionType = createNode(261, type.pos);
-                    unionType.types = parseJSDocTypeList(type);
-                    type = finishNode(unionType);
-                }
-                if (token === 56) {
-                    var optionalType = createNode(268, type.pos);
-                    nextToken();
-                    optionalType.type = type;
-                    type = finishNode(optionalType);
-                }
-                return type;
-            }
-            function parseJSDocType() {
-                var type = parseBasicTypeExpression();
-                while (true) {
-                    if (token === 19) {
-                        var arrayType = createNode(260, type.pos);
-                        arrayType.elementType = type;
-                        nextToken();
-                        parseExpected(20);
-                        type = finishNode(arrayType);
-                    }
-                    else if (token === 53) {
-                        var nullableType = createNode(263, type.pos);
-                        nullableType.type = type;
-                        nextToken();
-                        type = finishNode(nullableType);
-                    }
-                    else if (token === 49) {
-                        var nonNullableType = createNode(264, type.pos);
-                        nonNullableType.type = type;
-                        nextToken();
-                        type = finishNode(nonNullableType);
-                    }
-                    else {
-                        break;
-                    }
-                }
-                return type;
-            }
-            function parseBasicTypeExpression() {
-                switch (token) {
-                    case 37:
-                        return parseJSDocAllType();
-                    case 53:
-                        return parseJSDocUnknownOrNullableType();
-                    case 17:
-                        return parseJSDocUnionType();
-                    case 19:
-                        return parseJSDocTupleType();
-                    case 49:
-                        return parseJSDocNonNullableType();
-                    case 15:
-                        return parseJSDocRecordType();
-                    case 87:
-                        return parseJSDocFunctionType();
-                    case 22:
-                        return parseJSDocVariadicType();
-                    case 92:
-                        return parseJSDocConstructorType();
-                    case 97:
-                        return parseJSDocThisType();
-                    case 117:
-                    case 132:
-                    case 130:
-                    case 120:
-                    case 133:
-                    case 103:
-                        return parseTokenNode();
-                }
-                return parseJSDocTypeReference();
-            }
-            function parseJSDocThisType() {
-                var result = createNode(272);
-                nextToken();
-                parseExpected(54);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocConstructorType() {
-                var result = createNode(271);
-                nextToken();
-                parseExpected(54);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocVariadicType() {
-                var result = createNode(270);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocFunctionType() {
-                var result = createNode(269);
-                nextToken();
-                parseExpected(17);
-                result.parameters = parseDelimitedList(22, parseJSDocParameter);
-                checkForTrailingComma(result.parameters);
-                parseExpected(18);
-                if (token === 54) {
-                    nextToken();
-                    result.type = parseJSDocType();
-                }
-                return finishNode(result);
-            }
-            function parseJSDocParameter() {
-                var parameter = createNode(142);
-                parameter.type = parseJSDocType();
-                if (parseOptional(56)) {
-                    parameter.questionToken = createNode(56);
-                }
-                return finishNode(parameter);
-            }
-            function parseJSDocTypeReference() {
-                var result = createNode(267);
-                result.name = parseSimplePropertyName();
-                if (token === 25) {
-                    result.typeArguments = parseTypeArguments();
-                }
-                else {
-                    while (parseOptional(21)) {
-                        if (token === 25) {
-                            result.typeArguments = parseTypeArguments();
-                            break;
-                        }
-                        else {
-                            result.name = parseQualifiedName(result.name);
-                        }
-                    }
-                }
-                return finishNode(result);
-            }
-            function parseTypeArguments() {
-                nextToken();
-                var typeArguments = parseDelimitedList(23, parseJSDocType);
-                checkForTrailingComma(typeArguments);
-                checkForEmptyTypeArgumentList(typeArguments);
-                parseExpected(27);
-                return typeArguments;
-            }
-            function checkForEmptyTypeArgumentList(typeArguments) {
-                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
-                    var start = typeArguments.pos - "<".length;
-                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
-                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
-                }
-            }
-            function parseQualifiedName(left) {
-                var result = createNode(139, left.pos);
-                result.left = left;
-                result.right = parseIdentifierName();
-                return finishNode(result);
-            }
-            function parseJSDocRecordType() {
-                var result = createNode(265);
-                nextToken();
-                result.members = parseDelimitedList(24, parseJSDocRecordMember);
-                checkForTrailingComma(result.members);
-                parseExpected(16);
-                return finishNode(result);
-            }
-            function parseJSDocRecordMember() {
-                var result = createNode(266);
-                result.name = parseSimplePropertyName();
-                if (token === 54) {
-                    nextToken();
-                    result.type = parseJSDocType();
-                }
-                return finishNode(result);
-            }
-            function parseJSDocNonNullableType() {
-                var result = createNode(264);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocTupleType() {
-                var result = createNode(262);
-                nextToken();
-                result.types = parseDelimitedList(25, parseJSDocType);
-                checkForTrailingComma(result.types);
-                parseExpected(20);
-                return finishNode(result);
-            }
-            function checkForTrailingComma(list) {
-                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
-                    var start = list.end - ",".length;
-                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
-                }
-            }
-            function parseJSDocUnionType() {
-                var result = createNode(261);
-                nextToken();
-                result.types = parseJSDocTypeList(parseJSDocType());
-                parseExpected(18);
-                return finishNode(result);
-            }
-            function parseJSDocTypeList(firstType) {
-                ts.Debug.assert(!!firstType);
-                var types = [];
-                types.pos = firstType.pos;
-                types.push(firstType);
-                while (parseOptional(47)) {
-                    types.push(parseJSDocType());
-                }
-                types.end = scanner.getStartPos();
-                return types;
-            }
-            function parseJSDocAllType() {
-                var result = createNode(258);
-                nextToken();
-                return finishNode(result);
-            }
-            function parseJSDocUnknownOrNullableType() {
-                var pos = scanner.getStartPos();
-                nextToken();
-                if (token === 24 ||
-                    token === 16 ||
-                    token === 18 ||
-                    token === 27 ||
-                    token === 56 ||
-                    token === 47) {
-                    var result = createNode(259, pos);
-                    return finishNode(result);
-                }
-                else {
-                    var result = createNode(263, pos);
-                    result.type = parseJSDocType();
-                    return finishNode(result);
-                }
-            }
-            function parseIsolatedJSDocComment(content, start, length) {
-                initializeState("file.js", content, 2, undefined, 1);
-                sourceFile = { languageVariant: 0, text: content };
-                var jsDocComment = parseJSDocCommentWorker(start, length);
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDocComment ? { jsDocComment: jsDocComment, diagnostics: diagnostics } : undefined;
-            }
-            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-            function parseJSDocComment(parent, start, length) {
-                var saveToken = token;
-                var saveParseDiagnosticsLength = parseDiagnostics.length;
-                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-                var comment = parseJSDocCommentWorker(start, length);
-                if (comment) {
-                    comment.parent = parent;
-                }
-                token = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-                return comment;
-            }
-            JSDocParser.parseJSDocComment = parseJSDocComment;
-            function parseJSDocCommentWorker(start, length) {
-                var content = sourceText;
-                start = start || 0;
-                var end = length === undefined ? content.length : start + length;
-                length = end - start;
-                ts.Debug.assert(start >= 0);
-                ts.Debug.assert(start <= end);
-                ts.Debug.assert(end <= content.length);
-                var tags;
-                var result;
-                if (content.charCodeAt(start) === 47 &&
-                    content.charCodeAt(start + 1) === 42 &&
-                    content.charCodeAt(start + 2) === 42 &&
-                    content.charCodeAt(start + 3) !== 42) {
-                    scanner.scanRange(start + 3, length - 5, function () {
-                        var canParseTag = true;
-                        var seenAsterisk = true;
-                        nextJSDocToken();
-                        while (token !== 1) {
-                            switch (token) {
-                                case 55:
-                                    if (canParseTag) {
-                                        parseTag();
-                                    }
-                                    seenAsterisk = false;
-                                    break;
-                                case 4:
-                                    canParseTag = true;
-                                    seenAsterisk = false;
-                                    break;
-                                case 37:
-                                    if (seenAsterisk) {
-                                        canParseTag = false;
-                                    }
-                                    seenAsterisk = true;
-                                    break;
-                                case 69:
-                                    canParseTag = false;
-                                    break;
-                                case 1:
-                                    break;
-                            }
-                            nextJSDocToken();
-                        }
-                        result = createJSDocComment();
-                    });
-                }
-                return result;
-                function createJSDocComment() {
-                    if (!tags) {
-                        return undefined;
-                    }
-                    var result = createNode(273, start);
-                    result.tags = tags;
-                    return finishNode(result, end);
-                }
-                function skipWhitespace() {
-                    while (token === 5 || token === 4) {
-                        nextJSDocToken();
-                    }
-                }
-                function parseTag() {
-                    ts.Debug.assert(token === 55);
-                    var atToken = createNode(55, scanner.getTokenPos());
-                    atToken.end = scanner.getTextPos();
-                    nextJSDocToken();
-                    var tagName = parseJSDocIdentifierName();
-                    if (!tagName) {
-                        return;
-                    }
-                    var tag = handleTag(atToken, tagName) || handleUnknownTag(atToken, tagName);
-                    addTag(tag);
-                }
-                function handleTag(atToken, tagName) {
-                    if (tagName) {
-                        switch (tagName.text) {
-                            case "param":
-                                return handleParamTag(atToken, tagName);
-                            case "return":
-                            case "returns":
-                                return handleReturnTag(atToken, tagName);
-                            case "template":
-                                return handleTemplateTag(atToken, tagName);
-                            case "type":
-                                return handleTypeTag(atToken, tagName);
-                        }
-                    }
-                    return undefined;
-                }
-                function handleUnknownTag(atToken, tagName) {
-                    var result = createNode(274, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    return finishNode(result);
-                }
-                function addTag(tag) {
-                    if (tag) {
-                        if (!tags) {
-                            tags = [];
-                            tags.pos = tag.pos;
-                        }
-                        tags.push(tag);
-                        tags.end = tag.end;
-                    }
-                }
-                function tryParseTypeExpression() {
-                    if (token !== 15) {
-                        return undefined;
-                    }
-                    var typeExpression = parseJSDocTypeExpression();
-                    return typeExpression;
-                }
-                function handleParamTag(atToken, tagName) {
-                    var typeExpression = tryParseTypeExpression();
-                    skipWhitespace();
-                    var name;
-                    var isBracketed;
-                    if (parseOptionalToken(19)) {
-                        name = parseJSDocIdentifierName();
-                        isBracketed = true;
-                        if (parseOptionalToken(56)) {
-                            parseExpression();
-                        }
-                        parseExpected(20);
-                    }
-                    else if (ts.tokenIsIdentifierOrKeyword(token)) {
-                        name = parseJSDocIdentifierName();
-                    }
-                    if (!name) {
-                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var preName, postName;
-                    if (typeExpression) {
-                        postName = name;
-                    }
-                    else {
-                        preName = name;
-                    }
-                    if (!typeExpression) {
-                        typeExpression = tryParseTypeExpression();
-                    }
-                    var result = createNode(275, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.preParameterName = preName;
-                    result.typeExpression = typeExpression;
-                    result.postParameterName = postName;
-                    result.isBracketed = isBracketed;
-                    return finishNode(result);
-                }
-                function handleReturnTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 276; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(276, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
-                }
-                function handleTypeTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 277; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(277, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
-                }
-                function handleTemplateTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 278; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var typeParameters = [];
-                    typeParameters.pos = scanner.getStartPos();
-                    while (true) {
-                        var name_8 = parseJSDocIdentifierName();
-                        if (!name_8) {
-                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                            return undefined;
-                        }
-                        var typeParameter = createNode(141, name_8.pos);
-                        typeParameter.name = name_8;
-                        finishNode(typeParameter);
-                        typeParameters.push(typeParameter);
-                        if (token === 24) {
-                            nextJSDocToken();
-                        }
-                        else {
-                            break;
-                        }
-                    }
-                    var result = createNode(278, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeParameters = typeParameters;
-                    finishNode(result);
-                    typeParameters.end = result.end;
-                    return result;
-                }
-                function nextJSDocToken() {
-                    return token = scanner.scanJSDocToken();
-                }
-                function parseJSDocIdentifierName() {
-                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token));
-                }
-                function createJSDocIdentifier(isIdentifier) {
-                    if (!isIdentifier) {
-                        parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var pos = scanner.getTokenPos();
-                    var end = scanner.getTextPos();
-                    var result = createNode(69, pos);
-                    result.text = content.substring(pos, end);
-                    finishNode(result, end);
-                    nextJSDocToken();
-                    return result;
-                }
-            }
-            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
-        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
-    })(Parser || (Parser = {}));
-    var IncrementalParser;
-    (function (IncrementalParser) {
-        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2);
-            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
-            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
-                return sourceFile;
-            }
-            if (sourceFile.statements.length === 0) {
-                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, undefined, true, sourceFile.scriptKind);
-            }
-            var incrementalSourceFile = sourceFile;
-            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
-            incrementalSourceFile.hasBeenIncrementallyParsed = true;
-            var oldText = sourceFile.text;
-            var syntaxCursor = createSyntaxCursor(sourceFile);
-            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
-            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
-            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
-            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
-            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
-            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
-            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
-            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, true, sourceFile.scriptKind);
-            return result;
-        }
-        IncrementalParser.updateSourceFile = updateSourceFile;
-        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
-            if (isArray) {
-                visitArray(element);
-            }
-            else {
-                visitNode(element);
-            }
-            return;
-            function visitNode(node) {
-                var text = "";
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    text = oldText.substring(node.pos, node.end);
-                }
-                if (node._children) {
-                    node._children = undefined;
-                }
-                if (node.jsDocComment) {
-                    node.jsDocComment = undefined;
-                }
-                node.pos += delta;
-                node.end += delta;
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
-                }
-                forEachChild(node, visitNode, visitArray);
-                checkNodePositions(node, aggressiveChecks);
-            }
-            function visitArray(array) {
-                array._children = undefined;
-                array.pos += delta;
-                array.end += delta;
-                for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
-                    var node = array_7[_i];
-                    visitNode(node);
-                }
-            }
-        }
-        function shouldCheckNode(node) {
-            switch (node.kind) {
-                case 9:
-                case 8:
-                case 69:
-                    return true;
-            }
-            return false;
-        }
-        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
-            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
-            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
-            ts.Debug.assert(element.pos <= element.end);
-            element.pos = Math.min(element.pos, changeRangeNewEnd);
-            if (element.end >= changeRangeOldEnd) {
-                element.end += delta;
-            }
-            else {
-                element.end = Math.min(element.end, changeRangeNewEnd);
-            }
-            ts.Debug.assert(element.pos <= element.end);
-            if (element.parent) {
-                ts.Debug.assert(element.pos >= element.parent.pos);
-                ts.Debug.assert(element.end <= element.parent.end);
-            }
-        }
-        function checkNodePositions(node, aggressiveChecks) {
-            if (aggressiveChecks) {
-                var pos_2 = node.pos;
-                forEachChild(node, function (child) {
-                    ts.Debug.assert(child.pos >= pos_2);
-                    pos_2 = child.end;
-                });
-                ts.Debug.assert(pos_2 <= node.end);
-            }
-        }
-        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
-            visitNode(sourceFile);
-            return;
-            function visitNode(child) {
-                ts.Debug.assert(child.pos <= child.end);
-                if (child.pos > changeRangeOldEnd) {
-                    moveElementEntirelyPastChangeRange(child, false, delta, oldText, newText, aggressiveChecks);
-                    return;
-                }
-                var fullEnd = child.end;
-                if (fullEnd >= changeStart) {
-                    child.intersectsChange = true;
-                    child._children = undefined;
-                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    forEachChild(child, visitNode, visitArray);
-                    checkNodePositions(child, aggressiveChecks);
-                    return;
-                }
-                ts.Debug.assert(fullEnd < changeStart);
-            }
-            function visitArray(array) {
-                ts.Debug.assert(array.pos <= array.end);
-                if (array.pos > changeRangeOldEnd) {
-                    moveElementEntirelyPastChangeRange(array, true, delta, oldText, newText, aggressiveChecks);
-                    return;
-                }
-                var fullEnd = array.end;
-                if (fullEnd >= changeStart) {
-                    array.intersectsChange = true;
-                    array._children = undefined;
-                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
-                        var node = array_8[_i];
-                        visitNode(node);
-                    }
-                    return;
-                }
-                ts.Debug.assert(fullEnd < changeStart);
-            }
-        }
-        function extendToAffectedRange(sourceFile, changeRange) {
-            var maxLookahead = 1;
-            var start = changeRange.span.start;
-            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
-                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
-                ts.Debug.assert(nearestNode.pos <= start);
-                var position = nearestNode.pos;
-                start = Math.max(0, position - 1);
-            }
-            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
-            var finalLength = changeRange.newLength + (changeRange.span.start - start);
-            return ts.createTextChangeRange(finalSpan, finalLength);
-        }
-        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
-            var bestResult = sourceFile;
-            var lastNodeEntirelyBeforePosition;
-            forEachChild(sourceFile, visit);
-            if (lastNodeEntirelyBeforePosition) {
-                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
-                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
-                    bestResult = lastChildOfLastEntireNodeBeforePosition;
-                }
-            }
-            return bestResult;
-            function getLastChild(node) {
-                while (true) {
-                    var lastChild = getLastChildWorker(node);
-                    if (lastChild) {
-                        node = lastChild;
-                    }
-                    else {
-                        return node;
-                    }
-                }
-            }
-            function getLastChildWorker(node) {
-                var last = undefined;
-                forEachChild(node, function (child) {
-                    if (ts.nodeIsPresent(child)) {
-                        last = child;
-                    }
-                });
-                return last;
-            }
-            function visit(child) {
-                if (ts.nodeIsMissing(child)) {
-                    return;
-                }
-                if (child.pos <= position) {
-                    if (child.pos >= bestResult.pos) {
-                        bestResult = child;
-                    }
-                    if (position < child.end) {
-                        forEachChild(child, visit);
-                        return true;
-                    }
-                    else {
-                        ts.Debug.assert(child.end <= position);
-                        lastNodeEntirelyBeforePosition = child;
-                    }
-                }
-                else {
-                    ts.Debug.assert(child.pos > position);
-                    return true;
-                }
-            }
-        }
-        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            var oldText = sourceFile.text;
-            if (textChangeRange) {
-                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
-                if (aggressiveChecks || ts.Debug.shouldAssert(3)) {
-                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
-                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
-                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
-                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
-                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
-                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
-                }
-            }
-        }
-        function createSyntaxCursor(sourceFile) {
-            var currentArray = sourceFile.statements;
-            var currentArrayIndex = 0;
-            ts.Debug.assert(currentArrayIndex < currentArray.length);
-            var current = currentArray[currentArrayIndex];
-            var lastQueriedPosition = -1;
-            return {
-                currentNode: function (position) {
-                    if (position !== lastQueriedPosition) {
-                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
-                            currentArrayIndex++;
-                            current = currentArray[currentArrayIndex];
-                        }
-                        if (!current || current.pos !== position) {
-                            findHighestListElementThatStartsAtPosition(position);
-                        }
-                    }
-                    lastQueriedPosition = position;
-                    ts.Debug.assert(!current || current.pos === position);
-                    return current;
-                }
-            };
-            function findHighestListElementThatStartsAtPosition(position) {
-                currentArray = undefined;
-                currentArrayIndex = -1;
-                current = undefined;
-                forEachChild(sourceFile, visitNode, visitArray);
-                return;
-                function visitNode(node) {
-                    if (position >= node.pos && position < node.end) {
-                        forEachChild(node, visitNode, visitArray);
-                        return true;
-                    }
-                    return false;
-                }
-                function visitArray(array) {
-                    if (position >= array.pos && position < array.end) {
-                        for (var i = 0, n = array.length; i < n; i++) {
-                            var child = array[i];
-                            if (child) {
-                                if (child.pos === position) {
-                                    currentArray = array;
-                                    currentArrayIndex = i;
-                                    current = child;
-                                    return true;
-                                }
-                                else {
-                                    if (child.pos < position && position < child.end) {
-                                        forEachChild(child, visitNode, visitArray);
-                                        return true;
-                                    }
-                                }
-                            }
-                        }
-                    }
-                    return false;
-                }
-            }
-        }
-    })(IncrementalParser || (IncrementalParser = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.bindTime = 0;
-    function getModuleInstanceState(node) {
-        if (node.kind === 222 || node.kind === 223) {
-            return 0;
-        }
-        else if (ts.isConstEnumDeclaration(node)) {
-            return 2;
-        }
-        else if ((node.kind === 230 || node.kind === 229) && !(node.flags & 1)) {
-            return 0;
-        }
-        else if (node.kind === 226) {
-            var state_1 = 0;
-            ts.forEachChild(node, function (n) {
-                switch (getModuleInstanceState(n)) {
-                    case 0:
-                        return false;
-                    case 2:
-                        state_1 = 2;
-                        return false;
-                    case 1:
-                        state_1 = 1;
-                        return true;
-                }
-            });
-            return state_1;
-        }
-        else if (node.kind === 225) {
-            return getModuleInstanceState(node.body);
-        }
-        else {
-            return 1;
-        }
-    }
-    ts.getModuleInstanceState = getModuleInstanceState;
-    var binder = createBinder();
-    function bindSourceFile(file, options) {
-        var start = new Date().getTime();
-        binder(file, options);
-        ts.bindTime += new Date().getTime() - start;
-    }
-    ts.bindSourceFile = bindSourceFile;
-    function createBinder() {
-        var file;
-        var options;
-        var languageVersion;
-        var parent;
-        var container;
-        var blockScopeContainer;
-        var lastContainer;
-        var seenThisKeyword;
-        var hasExplicitReturn;
-        var currentFlow;
-        var currentBreakTarget;
-        var currentContinueTarget;
-        var currentTrueTarget;
-        var currentFalseTarget;
-        var preSwitchCaseFlow;
-        var activeLabels;
-        var hasClassExtends;
-        var hasAsyncFunctions;
-        var hasDecorators;
-        var hasParameterDecorators;
-        var hasJsxSpreadAttribute;
-        var inStrictMode;
-        var symbolCount = 0;
-        var Symbol;
-        var classifiableNames;
-        var unreachableFlow = { flags: 1 };
-        var reportedUnreachableFlow = { flags: 1 };
-        function bindSourceFile(f, opts) {
-            file = f;
-            options = opts;
-            languageVersion = ts.getEmitScriptTarget(options);
-            inStrictMode = !!file.externalModuleIndicator;
-            classifiableNames = {};
-            symbolCount = 0;
-            Symbol = ts.objectAllocator.getSymbolConstructor();
-            if (!file.locals) {
-                bind(file);
-                file.symbolCount = symbolCount;
-                file.classifiableNames = classifiableNames;
-            }
-            file = undefined;
-            options = undefined;
-            languageVersion = undefined;
-            parent = undefined;
-            container = undefined;
-            blockScopeContainer = undefined;
-            lastContainer = undefined;
-            seenThisKeyword = false;
-            hasExplicitReturn = false;
-            currentFlow = undefined;
-            currentBreakTarget = undefined;
-            currentContinueTarget = undefined;
-            currentTrueTarget = undefined;
-            currentFalseTarget = undefined;
-            activeLabels = undefined;
-            hasClassExtends = false;
-            hasAsyncFunctions = false;
-            hasDecorators = false;
-            hasParameterDecorators = false;
-            hasJsxSpreadAttribute = false;
-        }
-        return bindSourceFile;
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
-        }
-        function addDeclarationToSymbol(symbol, node, symbolFlags) {
-            symbol.flags |= symbolFlags;
-            node.symbol = symbol;
-            if (!symbol.declarations) {
-                symbol.declarations = [];
-            }
-            symbol.declarations.push(node);
-            if (symbolFlags & 1952 && !symbol.exports) {
-                symbol.exports = {};
-            }
-            if (symbolFlags & 6240 && !symbol.members) {
-                symbol.members = {};
-            }
-            if (symbolFlags & 107455) {
-                var valueDeclaration = symbol.valueDeclaration;
-                if (!valueDeclaration ||
-                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 225)) {
-                    symbol.valueDeclaration = node;
-                }
-            }
-        }
-        function getDeclarationName(node) {
-            if (node.name) {
-                if (ts.isAmbientModule(node)) {
-                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
-                }
-                if (node.name.kind === 140) {
-                    var nameExpression = node.name.expression;
-                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
-                        return nameExpression.text;
-                    }
-                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
-                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
-                }
-                return node.name.text;
-            }
-            switch (node.kind) {
-                case 148:
-                    return "__constructor";
-                case 156:
-                case 151:
-                    return "__call";
-                case 157:
-                case 152:
-                    return "__new";
-                case 153:
-                    return "__index";
-                case 236:
-                    return "__export";
-                case 235:
-                    return node.isExportEquals ? "export=" : "default";
-                case 187:
-                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
-                        case 2:
-                            return "export=";
-                        case 1:
-                        case 4:
-                            return node.left.name.text;
-                        case 3:
-                            return node.left.expression.name.text;
-                    }
-                    ts.Debug.fail("Unknown binary declaration kind");
-                    break;
-                case 220:
-                case 221:
-                    return node.flags & 512 ? "default" : undefined;
-                case 269:
-                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
-                case 142:
-                    ts.Debug.assert(node.parent.kind === 269);
-                    var functionType = node.parent;
-                    var index = ts.indexOf(functionType.parameters, node);
-                    return "p" + index;
-            }
-        }
-        function getDisplayName(node) {
-            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
-        }
-        function declareSymbol(symbolTable, parent, node, includes, excludes) {
-            ts.Debug.assert(!ts.hasDynamicName(node));
-            var isDefaultExport = node.flags & 512;
-            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
-            var symbol;
-            if (name !== undefined) {
-                symbol = ts.hasProperty(symbolTable, name)
-                    ? symbolTable[name]
-                    : (symbolTable[name] = createSymbol(0, name));
-                if (name && (includes & 788448)) {
-                    classifiableNames[name] = name;
-                }
-                if (symbol.flags & excludes) {
-                    if (node.name) {
-                        node.name.parent = node;
-                    }
-                    var message_1 = symbol.flags & 2
-                        ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
-                        : ts.Diagnostics.Duplicate_identifier_0;
-                    ts.forEach(symbol.declarations, function (declaration) {
-                        if (declaration.flags & 512) {
-                            message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
-                        }
-                    });
-                    ts.forEach(symbol.declarations, function (declaration) {
-                        file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
-                    });
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
-                    symbol = createSymbol(0, name);
-                }
-            }
-            else {
-                symbol = createSymbol(0, "__missing");
-            }
-            addDeclarationToSymbol(symbol, node, includes);
-            symbol.parent = parent;
-            return symbol;
-        }
-        function declareModuleMember(node, symbolFlags, symbolExcludes) {
-            var hasExportModifier = ts.getCombinedNodeFlags(node) & 1;
-            if (symbolFlags & 8388608) {
-                if (node.kind === 238 || (node.kind === 229 && hasExportModifier)) {
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-                }
-            }
-            else {
-                if (!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 8192)) {
-                    var exportKind = (symbolFlags & 107455 ? 1048576 : 0) |
-                        (symbolFlags & 793056 ? 2097152 : 0) |
-                        (symbolFlags & 1536 ? 4194304 : 0);
-                    var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
-                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                    node.localSymbol = local;
-                    return local;
-                }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-                }
-            }
-        }
-        function bindChildren(node) {
-            var saveParent = parent;
-            var saveContainer = container;
-            var savedBlockScopeContainer = blockScopeContainer;
-            parent = node;
-            var containerFlags = getContainerFlags(node);
-            if (containerFlags & 1) {
-                container = blockScopeContainer = node;
-                if (containerFlags & 4) {
-                    container.locals = {};
-                }
-                addToContainerChain(container);
-            }
-            else if (containerFlags & 2) {
-                blockScopeContainer = node;
-                blockScopeContainer.locals = undefined;
-            }
-            var savedHasExplicitReturn;
-            var savedCurrentFlow;
-            var savedBreakTarget;
-            var savedContinueTarget;
-            var savedActiveLabels;
-            var kind = node.kind;
-            var flags = node.flags;
-            flags &= ~98304;
-            flags &= ~3932160;
-            if (kind === 222) {
-                seenThisKeyword = false;
-            }
-            var saveState = kind === 256 || kind === 226 || ts.isFunctionLikeKind(kind);
-            if (saveState) {
-                savedHasExplicitReturn = hasExplicitReturn;
-                savedCurrentFlow = currentFlow;
-                savedBreakTarget = currentBreakTarget;
-                savedContinueTarget = currentContinueTarget;
-                savedActiveLabels = activeLabels;
-                hasExplicitReturn = false;
-                currentFlow = { flags: 2 };
-                currentBreakTarget = undefined;
-                currentContinueTarget = undefined;
-                activeLabels = undefined;
-            }
-            if (ts.isInJavaScriptFile(node) && node.jsDocComment) {
-                bind(node.jsDocComment);
-            }
-            bindReachableStatement(node);
-            if (!(currentFlow.flags & 1) && ts.isFunctionLikeKind(kind) && ts.nodeIsPresent(node.body)) {
-                flags |= 32768;
-                if (hasExplicitReturn) {
-                    flags |= 65536;
-                }
-            }
-            if (kind === 222) {
-                flags = seenThisKeyword ? flags | 16384 : flags & ~16384;
-            }
-            if (kind === 256) {
-                if (hasClassExtends) {
-                    flags |= 262144;
-                }
-                if (hasDecorators) {
-                    flags |= 524288;
-                }
-                if (hasParameterDecorators) {
-                    flags |= 1048576;
-                }
-                if (hasAsyncFunctions) {
-                    flags |= 2097152;
-                }
-                if (hasJsxSpreadAttribute) {
-                    flags |= 1073741824;
-                }
-            }
-            node.flags = flags;
-            if (saveState) {
-                hasExplicitReturn = savedHasExplicitReturn;
-                currentFlow = savedCurrentFlow;
-                currentBreakTarget = savedBreakTarget;
-                currentContinueTarget = savedContinueTarget;
-                activeLabels = savedActiveLabels;
-            }
-            container = saveContainer;
-            parent = saveParent;
-            blockScopeContainer = savedBlockScopeContainer;
-        }
-        function bindReachableStatement(node) {
-            if (checkUnreachable(node)) {
-                ts.forEachChild(node, bind);
-                return;
-            }
-            switch (node.kind) {
-                case 205:
-                    bindWhileStatement(node);
-                    break;
-                case 204:
-                    bindDoStatement(node);
-                    break;
-                case 206:
-                    bindForStatement(node);
-                    break;
-                case 207:
-                case 208:
-                    bindForInOrForOfStatement(node);
-                    break;
-                case 203:
-                    bindIfStatement(node);
-                    break;
-                case 211:
-                case 215:
-                    bindReturnOrThrow(node);
-                    break;
-                case 210:
-                case 209:
-                    bindBreakOrContinueStatement(node);
-                    break;
-                case 216:
-                    bindTryStatement(node);
-                    break;
-                case 213:
-                    bindSwitchStatement(node);
-                    break;
-                case 227:
-                    bindCaseBlock(node);
-                    break;
-                case 214:
-                    bindLabeledStatement(node);
-                    break;
-                case 185:
-                    bindPrefixUnaryExpressionFlow(node);
-                    break;
-                case 187:
-                    bindBinaryExpressionFlow(node);
-                    break;
-                case 181:
-                    bindDeleteExpressionFlow(node);
-                    break;
-                case 188:
-                    bindConditionalExpressionFlow(node);
-                    break;
-                case 218:
-                    bindVariableDeclarationFlow(node);
-                    break;
-                default:
-                    ts.forEachChild(node, bind);
-                    break;
-            }
-        }
-        function isNarrowableReference(expr) {
-            return expr.kind === 69 ||
-                expr.kind === 97 ||
-                expr.kind === 172 && isNarrowableReference(expr.expression);
-        }
-        function isNarrowingExpression(expr) {
-            switch (expr.kind) {
-                case 69:
-                case 97:
-                case 172:
-                    return isNarrowableReference(expr);
-                case 174:
-                    return true;
-                case 178:
-                    return isNarrowingExpression(expr.expression);
-                case 187:
-                    return isNarrowingBinaryExpression(expr);
-                case 185:
-                    return expr.operator === 49 && isNarrowingExpression(expr.operand);
-            }
-            return false;
-        }
-        function isNarrowingBinaryExpression(expr) {
-            switch (expr.operatorToken.kind) {
-                case 56:
-                    return isNarrowableReference(expr.left);
-                case 30:
-                case 31:
-                case 32:
-                case 33:
-                    if (isNarrowingExpression(expr.left) && (expr.right.kind === 93 || expr.right.kind === 69)) {
-                        return true;
-                    }
-                    if (expr.left.kind === 182 && isNarrowingExpression(expr.left.expression) && expr.right.kind === 9) {
-                        return true;
-                    }
-                    return false;
-                case 91:
-                    return isNarrowingExpression(expr.left);
-                case 24:
-                    return isNarrowingExpression(expr.right);
-            }
-            return false;
-        }
-        function createBranchLabel() {
-            return {
-                flags: 4,
-                antecedents: undefined
-            };
-        }
-        function createLoopLabel() {
-            return {
-                flags: 8,
-                antecedents: undefined
-            };
-        }
-        function setFlowNodeReferenced(flow) {
-            flow.flags |= flow.flags & 128 ? 256 : 128;
-        }
-        function addAntecedent(label, antecedent) {
-            if (!(antecedent.flags & 1) && !ts.contains(label.antecedents, antecedent)) {
-                (label.antecedents || (label.antecedents = [])).push(antecedent);
-                setFlowNodeReferenced(antecedent);
-            }
-        }
-        function createFlowCondition(flags, antecedent, expression) {
-            if (antecedent.flags & 1) {
-                return antecedent;
-            }
-            if (!expression) {
-                return flags & 32 ? antecedent : unreachableFlow;
-            }
-            if (expression.kind === 99 && flags & 64 ||
-                expression.kind === 84 && flags & 32) {
-                return unreachableFlow;
-            }
-            if (!isNarrowingExpression(expression)) {
-                return antecedent;
-            }
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: flags,
-                antecedent: antecedent,
-                expression: expression
-            };
-        }
-        function createFlowAssignment(antecedent, node) {
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: 16,
-                antecedent: antecedent,
-                node: node
-            };
-        }
-        function finishFlowLabel(flow) {
-            var antecedents = flow.antecedents;
-            if (!antecedents) {
-                return unreachableFlow;
-            }
-            if (antecedents.length === 1) {
-                return antecedents[0];
-            }
-            return flow;
-        }
-        function isStatementCondition(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 203:
-                case 205:
-                case 204:
-                    return parent.expression === node;
-                case 206:
-                case 188:
-                    return parent.condition === node;
-            }
-            return false;
-        }
-        function isLogicalExpression(node) {
-            while (true) {
-                if (node.kind === 178) {
-                    node = node.expression;
-                }
-                else if (node.kind === 185 && node.operator === 49) {
-                    node = node.operand;
-                }
-                else {
-                    return node.kind === 187 && (node.operatorToken.kind === 51 ||
-                        node.operatorToken.kind === 52);
-                }
-            }
-        }
-        function isTopLevelLogicalExpression(node) {
-            while (node.parent.kind === 178 ||
-                node.parent.kind === 185 &&
-                    node.parent.operator === 49) {
-                node = node.parent;
-            }
-            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
-        }
-        function bindCondition(node, trueTarget, falseTarget) {
-            var saveTrueTarget = currentTrueTarget;
-            var saveFalseTarget = currentFalseTarget;
-            currentTrueTarget = trueTarget;
-            currentFalseTarget = falseTarget;
-            bind(node);
-            currentTrueTarget = saveTrueTarget;
-            currentFalseTarget = saveFalseTarget;
-            if (!node || !isLogicalExpression(node)) {
-                addAntecedent(trueTarget, createFlowCondition(32, currentFlow, node));
-                addAntecedent(falseTarget, createFlowCondition(64, currentFlow, node));
-            }
-        }
-        function bindIterativeStatement(node, breakTarget, continueTarget) {
-            var saveBreakTarget = currentBreakTarget;
-            var saveContinueTarget = currentContinueTarget;
-            currentBreakTarget = breakTarget;
-            currentContinueTarget = continueTarget;
-            bind(node);
-            currentBreakTarget = saveBreakTarget;
-            currentContinueTarget = saveContinueTarget;
-        }
-        function bindWhileStatement(node) {
-            var preWhileLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postWhileLabel = createBranchLabel();
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = preWhileLabel;
-            bindCondition(node.expression, preBodyLabel, postWhileLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = finishFlowLabel(postWhileLabel);
-        }
-        function bindDoStatement(node) {
-            var preDoLabel = createLoopLabel();
-            var preConditionLabel = createBranchLabel();
-            var postDoLabel = createBranchLabel();
-            addAntecedent(preDoLabel, currentFlow);
-            currentFlow = preDoLabel;
-            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
-            addAntecedent(preConditionLabel, currentFlow);
-            currentFlow = finishFlowLabel(preConditionLabel);
-            bindCondition(node.expression, preDoLabel, postDoLabel);
-            currentFlow = finishFlowLabel(postDoLabel);
-        }
-        function bindForStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postLoopLabel = createBranchLabel();
-            bind(node.initializer);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bindCondition(node.condition, preBodyLabel, postLoopLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            bind(node.incrementor);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindForInOrForOfStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var postLoopLabel = createBranchLabel();
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bind(node.expression);
-            addAntecedent(postLoopLabel, currentFlow);
-            bind(node.initializer);
-            if (node.initializer.kind !== 219) {
-                bindAssignmentTargetFlow(node.initializer);
-            }
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindIfStatement(node) {
-            var thenLabel = createBranchLabel();
-            var elseLabel = createBranchLabel();
-            var postIfLabel = createBranchLabel();
-            bindCondition(node.expression, thenLabel, elseLabel);
-            currentFlow = finishFlowLabel(thenLabel);
-            bind(node.thenStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(elseLabel);
-            bind(node.elseStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(postIfLabel);
-        }
-        function bindReturnOrThrow(node) {
-            bind(node.expression);
-            if (node.kind === 211) {
-                hasExplicitReturn = true;
-            }
-            currentFlow = unreachableFlow;
-        }
-        function findActiveLabel(name) {
-            if (activeLabels) {
-                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
-                    var label = activeLabels_1[_i];
-                    if (label.name === name) {
-                        return label;
-                    }
-                }
-            }
-            return undefined;
-        }
-        function bindbreakOrContinueFlow(node, breakTarget, continueTarget) {
-            var flowLabel = node.kind === 210 ? breakTarget : continueTarget;
-            if (flowLabel) {
-                addAntecedent(flowLabel, currentFlow);
-                currentFlow = unreachableFlow;
-            }
-        }
-        function bindBreakOrContinueStatement(node) {
-            bind(node.label);
-            if (node.label) {
-                var activeLabel = findActiveLabel(node.label.text);
-                if (activeLabel) {
-                    activeLabel.referenced = true;
-                    bindbreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
-                }
-            }
-            else {
-                bindbreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
-            }
-        }
-        function bindTryStatement(node) {
-            var postFinallyLabel = createBranchLabel();
-            var preTryFlow = currentFlow;
-            bind(node.tryBlock);
-            addAntecedent(postFinallyLabel, currentFlow);
-            if (node.catchClause) {
-                currentFlow = preTryFlow;
-                bind(node.catchClause);
-                addAntecedent(postFinallyLabel, currentFlow);
-            }
-            if (node.finallyBlock) {
-                currentFlow = preTryFlow;
-                bind(node.finallyBlock);
-            }
-            currentFlow = finishFlowLabel(postFinallyLabel);
-        }
-        function bindSwitchStatement(node) {
-            var postSwitchLabel = createBranchLabel();
-            bind(node.expression);
-            var saveBreakTarget = currentBreakTarget;
-            var savePreSwitchCaseFlow = preSwitchCaseFlow;
-            currentBreakTarget = postSwitchLabel;
-            preSwitchCaseFlow = currentFlow;
-            bind(node.caseBlock);
-            addAntecedent(postSwitchLabel, currentFlow);
-            var hasDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 250; });
-            if (!hasDefault) {
-                addAntecedent(postSwitchLabel, preSwitchCaseFlow);
-            }
-            currentBreakTarget = saveBreakTarget;
-            preSwitchCaseFlow = savePreSwitchCaseFlow;
-            currentFlow = finishFlowLabel(postSwitchLabel);
-        }
-        function bindCaseBlock(node) {
-            var clauses = node.clauses;
-            for (var i = 0; i < clauses.length; i++) {
-                var clause = clauses[i];
-                if (clause.statements.length) {
-                    if (currentFlow.flags & 1) {
-                        currentFlow = preSwitchCaseFlow;
-                    }
-                    else {
-                        var preCaseLabel = createBranchLabel();
-                        addAntecedent(preCaseLabel, preSwitchCaseFlow);
-                        addAntecedent(preCaseLabel, currentFlow);
-                        currentFlow = finishFlowLabel(preCaseLabel);
-                    }
-                    bind(clause);
-                    if (!(currentFlow.flags & 1) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
-                        errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
-                    }
-                }
-                else {
-                    bind(clause);
-                }
-            }
-        }
-        function pushActiveLabel(name, breakTarget, continueTarget) {
-            var activeLabel = {
-                name: name,
-                breakTarget: breakTarget,
-                continueTarget: continueTarget,
-                referenced: false
-            };
-            (activeLabels || (activeLabels = [])).push(activeLabel);
-            return activeLabel;
-        }
-        function popActiveLabel() {
-            activeLabels.pop();
-        }
-        function bindLabeledStatement(node) {
-            var preStatementLabel = createLoopLabel();
-            var postStatementLabel = createBranchLabel();
-            bind(node.label);
-            addAntecedent(preStatementLabel, currentFlow);
-            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
-            bind(node.statement);
-            popActiveLabel();
-            if (!activeLabel.referenced && !options.allowUnusedLabels) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
-            }
-            addAntecedent(postStatementLabel, currentFlow);
-            currentFlow = finishFlowLabel(postStatementLabel);
-        }
-        function bindDestructuringTargetFlow(node) {
-            if (node.kind === 187 && node.operatorToken.kind === 56) {
-                bindAssignmentTargetFlow(node.left);
-            }
-            else {
-                bindAssignmentTargetFlow(node);
-            }
-        }
-        function bindAssignmentTargetFlow(node) {
-            if (isNarrowableReference(node)) {
-                currentFlow = createFlowAssignment(currentFlow, node);
-            }
-            else if (node.kind === 170) {
-                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
-                    var e = _a[_i];
-                    if (e.kind === 191) {
-                        bindAssignmentTargetFlow(e.expression);
-                    }
-                    else {
-                        bindDestructuringTargetFlow(e);
-                    }
-                }
-            }
-            else if (node.kind === 171) {
-                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
-                    var p = _c[_b];
-                    if (p.kind === 253) {
-                        bindDestructuringTargetFlow(p.initializer);
-                    }
-                    else if (p.kind === 254) {
-                        bindAssignmentTargetFlow(p.name);
-                    }
-                }
-            }
-        }
-        function bindLogicalExpression(node, trueTarget, falseTarget) {
-            var preRightLabel = createBranchLabel();
-            if (node.operatorToken.kind === 51) {
-                bindCondition(node.left, preRightLabel, falseTarget);
-            }
-            else {
-                bindCondition(node.left, trueTarget, preRightLabel);
-            }
-            currentFlow = finishFlowLabel(preRightLabel);
-            bind(node.operatorToken);
-            bindCondition(node.right, trueTarget, falseTarget);
-        }
-        function bindPrefixUnaryExpressionFlow(node) {
-            if (node.operator === 49) {
-                var saveTrueTarget = currentTrueTarget;
-                currentTrueTarget = currentFalseTarget;
-                currentFalseTarget = saveTrueTarget;
-                ts.forEachChild(node, bind);
-                currentFalseTarget = currentTrueTarget;
-                currentTrueTarget = saveTrueTarget;
-            }
-            else {
-                ts.forEachChild(node, bind);
-            }
-        }
-        function bindBinaryExpressionFlow(node) {
-            var operator = node.operatorToken.kind;
-            if (operator === 51 || operator === 52) {
-                if (isTopLevelLogicalExpression(node)) {
-                    var postExpressionLabel = createBranchLabel();
-                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
-                    currentFlow = finishFlowLabel(postExpressionLabel);
-                }
-                else {
-                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
-                }
-            }
-            else {
-                ts.forEachChild(node, bind);
-                if (operator === 56 && !ts.isAssignmentTarget(node)) {
-                    bindAssignmentTargetFlow(node.left);
-                }
-            }
-        }
-        function bindDeleteExpressionFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.expression.kind === 172) {
-                bindAssignmentTargetFlow(node.expression);
-            }
-        }
-        function bindConditionalExpressionFlow(node) {
-            var trueLabel = createBranchLabel();
-            var falseLabel = createBranchLabel();
-            var postExpressionLabel = createBranchLabel();
-            bindCondition(node.condition, trueLabel, falseLabel);
-            currentFlow = finishFlowLabel(trueLabel);
-            bind(node.whenTrue);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(falseLabel);
-            bind(node.whenFalse);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(postExpressionLabel);
-        }
-        function bindInitializedVariableFlow(node) {
-            var name = node.name;
-            if (ts.isBindingPattern(name)) {
-                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
-                    var child = _a[_i];
-                    bindInitializedVariableFlow(child);
-                }
-            }
-            else {
-                currentFlow = createFlowAssignment(currentFlow, node);
-            }
-        }
-        function bindVariableDeclarationFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.initializer || node.parent.parent.kind === 207 || node.parent.parent.kind === 208) {
-                bindInitializedVariableFlow(node);
-            }
-        }
-        function getContainerFlags(node) {
-            switch (node.kind) {
-                case 192:
-                case 221:
-                case 222:
-                case 224:
-                case 171:
-                case 159:
-                case 265:
-                    return 1;
-                case 151:
-                case 152:
-                case 153:
-                case 147:
-                case 146:
-                case 220:
-                case 148:
-                case 149:
-                case 150:
-                case 156:
-                case 269:
-                case 157:
-                case 179:
-                case 180:
-                case 225:
-                case 256:
-                case 223:
-                    return 5;
-                case 252:
-                case 206:
-                case 207:
-                case 208:
-                case 227:
-                    return 2;
-                case 199:
-                    return ts.isFunctionLike(node.parent) ? 0 : 2;
-            }
-            return 0;
-        }
-        function addToContainerChain(next) {
-            if (lastContainer) {
-                lastContainer.nextContainer = next;
-            }
-            lastContainer = next;
-        }
-        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
-            declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
-        }
-        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
-            switch (container.kind) {
-                case 225:
-                    return declareModuleMember(node, symbolFlags, symbolExcludes);
-                case 256:
-                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
-                case 192:
-                case 221:
-                    return declareClassMember(node, symbolFlags, symbolExcludes);
-                case 224:
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                case 159:
-                case 171:
-                case 222:
-                case 265:
-                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
-                case 156:
-                case 157:
-                case 151:
-                case 152:
-                case 153:
-                case 147:
-                case 146:
-                case 148:
-                case 149:
-                case 150:
-                case 220:
-                case 179:
-                case 180:
-                case 269:
-                case 223:
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-            }
-        }
-        function declareClassMember(node, symbolFlags, symbolExcludes) {
-            return node.flags & 32
-                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
-                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
-        }
-        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
-            return ts.isExternalModule(file)
-                ? declareModuleMember(node, symbolFlags, symbolExcludes)
-                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
-        }
-        function hasExportDeclarations(node) {
-            var body = node.kind === 256 ? node : node.body;
-            if (body.kind === 256 || body.kind === 226) {
-                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
-                    var stat = _a[_i];
-                    if (stat.kind === 236 || stat.kind === 235) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function setExportContextFlag(node) {
-            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
-                node.flags |= 8192;
-            }
-            else {
-                node.flags &= ~8192;
-            }
-        }
-        function bindModuleDeclaration(node) {
-            setExportContextFlag(node);
-            if (ts.isAmbientModule(node)) {
-                if (node.flags & 1) {
-                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
-                }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    declareSymbolAndAddToSymbolTable(node, 1024, 0);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 512, 106639);
-                }
-            }
-            else {
-                var state = getModuleInstanceState(node);
-                if (state === 0) {
-                    declareSymbolAndAddToSymbolTable(node, 1024, 0);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 512, 106639);
-                    if (node.symbol.flags & (16 | 32 | 256)) {
-                        node.symbol.constEnumOnlyModule = false;
-                    }
-                    else {
-                        var currentModuleIsConstEnumOnly = state === 2;
-                        if (node.symbol.constEnumOnlyModule === undefined) {
-                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
-                        }
-                        else {
-                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
-                        }
-                    }
-                }
-            }
-        }
-        function bindFunctionOrConstructorType(node) {
-            var symbol = createSymbol(131072, getDeclarationName(node));
-            addDeclarationToSymbol(symbol, node, 131072);
-            var typeLiteralSymbol = createSymbol(2048, "__type");
-            addDeclarationToSymbol(typeLiteralSymbol, node, 2048);
-            typeLiteralSymbol.members = (_a = {}, _a[symbol.name] = symbol, _a);
-            var _a;
-        }
-        function bindObjectLiteralExpression(node) {
-            if (inStrictMode) {
-                var seen = {};
-                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (prop.name.kind !== 69) {
-                        continue;
-                    }
-                    var identifier = prop.name;
-                    var currentKind = prop.kind === 253 || prop.kind === 254 || prop.kind === 147
-                        ? 1
-                        : 2;
-                    var existingKind = seen[identifier.text];
-                    if (!existingKind) {
-                        seen[identifier.text] = currentKind;
-                        continue;
-                    }
-                    if (currentKind === 1 && existingKind === 1) {
-                        var span = ts.getErrorSpanForNode(file, identifier);
-                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
-                    }
-                }
-            }
-            return bindAnonymousDeclaration(node, 4096, "__object");
-        }
-        function bindAnonymousDeclaration(node, symbolFlags, name) {
-            var symbol = createSymbol(symbolFlags, name);
-            addDeclarationToSymbol(symbol, node, symbolFlags);
-        }
-        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
-            switch (blockScopeContainer.kind) {
-                case 225:
-                    declareModuleMember(node, symbolFlags, symbolExcludes);
-                    break;
-                case 256:
-                    if (ts.isExternalModule(container)) {
-                        declareModuleMember(node, symbolFlags, symbolExcludes);
-                        break;
-                    }
-                default:
-                    if (!blockScopeContainer.locals) {
-                        blockScopeContainer.locals = {};
-                        addToContainerChain(blockScopeContainer);
-                    }
-                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
-            }
-        }
-        function bindBlockScopedVariableDeclaration(node) {
-            bindBlockScopedDeclaration(node, 2, 107455);
-        }
-        function checkStrictModeIdentifier(node) {
-            if (inStrictMode &&
-                node.originalKeywordKind >= 106 &&
-                node.originalKeywordKind <= 114 &&
-                !ts.isIdentifierName(node) &&
-                !ts.isInAmbientContext(node)) {
-                if (!file.parseDiagnostics.length) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
-                }
-            }
-        }
-        function getStrictModeIdentifierMessage(node) {
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
-        }
-        function checkStrictModeBinaryExpression(node) {
-            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
-                checkStrictModeEvalOrArguments(node, node.left);
-            }
-        }
-        function checkStrictModeCatchClause(node) {
-            if (inStrictMode && node.variableDeclaration) {
-                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
-            }
-        }
-        function checkStrictModeDeleteExpression(node) {
-            if (inStrictMode && node.expression.kind === 69) {
-                var span = ts.getErrorSpanForNode(file, node.expression);
-                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
-            }
-        }
-        function isEvalOrArgumentsIdentifier(node) {
-            return node.kind === 69 &&
-                (node.text === "eval" || node.text === "arguments");
-        }
-        function checkStrictModeEvalOrArguments(contextNode, name) {
-            if (name && name.kind === 69) {
-                var identifier = name;
-                if (isEvalOrArgumentsIdentifier(identifier)) {
-                    var span = ts.getErrorSpanForNode(file, name);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
-                }
-            }
-        }
-        function getStrictModeEvalOrArgumentsMessage(node) {
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
-        }
-        function checkStrictModeFunctionName(node) {
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-        }
-        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
-        }
-        function checkStrictModeFunctionDeclaration(node) {
-            if (languageVersion < 2) {
-                if (blockScopeContainer.kind !== 256 &&
-                    blockScopeContainer.kind !== 225 &&
-                    !ts.isFunctionLike(blockScopeContainer)) {
-                    var errorSpan = ts.getErrorSpanForNode(file, node);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
-                }
-            }
-        }
-        function checkStrictModeNumericLiteral(node) {
-            if (inStrictMode && node.isOctalLiteral) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
-            }
-        }
-        function checkStrictModePostfixUnaryExpression(node) {
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.operand);
-            }
-        }
-        function checkStrictModePrefixUnaryExpression(node) {
-            if (inStrictMode) {
-                if (node.operator === 41 || node.operator === 42) {
-                    checkStrictModeEvalOrArguments(node, node.operand);
-                }
-            }
-        }
-        function checkStrictModeWithStatement(node) {
-            if (inStrictMode) {
-                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
-            }
-        }
-        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
-            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
-        }
-        function getDestructuringParameterName(node) {
-            return "__" + ts.indexOf(node.parent.parameters, node);
-        }
-        function bind(node) {
-            if (!node) {
-                return;
-            }
-            node.parent = parent;
-            var savedInStrictMode = inStrictMode;
-            if (!savedInStrictMode) {
-                updateStrictMode(node);
-            }
-            bindWorker(node);
-            bindChildren(node);
-            inStrictMode = savedInStrictMode;
-        }
-        function updateStrictMode(node) {
-            switch (node.kind) {
-                case 256:
-                case 226:
-                    updateStrictModeStatementList(node.statements);
-                    return;
-                case 199:
-                    if (ts.isFunctionLike(node.parent)) {
-                        updateStrictModeStatementList(node.statements);
-                    }
-                    return;
-                case 221:
-                case 192:
-                    inStrictMode = true;
-                    return;
-            }
-        }
-        function updateStrictModeStatementList(statements) {
-            for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
-                var statement = statements_1[_i];
-                if (!ts.isPrologueDirective(statement)) {
-                    return;
-                }
-                if (isUseStrictPrologueDirective(statement)) {
-                    inStrictMode = true;
-                    return;
-                }
-            }
-        }
-        function isUseStrictPrologueDirective(node) {
-            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
-            return nodeText === '"use strict"' || nodeText === "'use strict'";
-        }
-        function bindWorker(node) {
-            switch (node.kind) {
-                case 69:
-                case 97:
-                    if (currentFlow && (ts.isExpression(node) || parent.kind === 254)) {
-                        node.flowNode = currentFlow;
-                    }
-                    return checkStrictModeIdentifier(node);
-                case 172:
-                    if (currentFlow && isNarrowableReference(node)) {
-                        node.flowNode = currentFlow;
-                    }
-                    break;
-                case 187:
-                    if (ts.isInJavaScriptFile(node)) {
-                        var specialKind = ts.getSpecialPropertyAssignmentKind(node);
-                        switch (specialKind) {
-                            case 1:
-                                bindExportsPropertyAssignment(node);
-                                break;
-                            case 2:
-                                bindModuleExportsAssignment(node);
-                                break;
-                            case 3:
-                                bindPrototypePropertyAssignment(node);
-                                break;
-                            case 4:
-                                bindThisPropertyAssignment(node);
-                                break;
-                            case 0:
-                                break;
-                            default:
-                                ts.Debug.fail("Unknown special property assignment kind");
-                        }
-                    }
-                    return checkStrictModeBinaryExpression(node);
-                case 252:
-                    return checkStrictModeCatchClause(node);
-                case 181:
-                    return checkStrictModeDeleteExpression(node);
-                case 8:
-                    return checkStrictModeNumericLiteral(node);
-                case 186:
-                    return checkStrictModePostfixUnaryExpression(node);
-                case 185:
-                    return checkStrictModePrefixUnaryExpression(node);
-                case 212:
-                    return checkStrictModeWithStatement(node);
-                case 165:
-                    seenThisKeyword = true;
-                    return;
-                case 154:
-                    return checkTypePredicate(node);
-                case 141:
-                    return declareSymbolAndAddToSymbolTable(node, 262144, 530912);
-                case 142:
-                    return bindParameter(node);
-                case 218:
-                case 169:
-                    return bindVariableDeclarationOrBindingElement(node);
-                case 145:
-                case 144:
-                case 266:
-                    return bindPropertyOrMethodOrAccessor(node, 4 | (node.questionToken ? 536870912 : 0), 0);
-                case 253:
-                case 254:
-                    return bindPropertyOrMethodOrAccessor(node, 4, 0);
-                case 255:
-                    return bindPropertyOrMethodOrAccessor(node, 8, 107455);
-                case 247:
-                    hasJsxSpreadAttribute = true;
-                    return;
-                case 151:
-                case 152:
-                case 153:
-                    return declareSymbolAndAddToSymbolTable(node, 131072, 0);
-                case 147:
-                case 146:
-                    return bindPropertyOrMethodOrAccessor(node, 8192 | (node.questionToken ? 536870912 : 0), ts.isObjectLiteralMethod(node) ? 0 : 99263);
-                case 220:
-                    return bindFunctionDeclaration(node);
-                case 148:
-                    return declareSymbolAndAddToSymbolTable(node, 16384, 0);
-                case 149:
-                    return bindPropertyOrMethodOrAccessor(node, 32768, 41919);
-                case 150:
-                    return bindPropertyOrMethodOrAccessor(node, 65536, 74687);
-                case 156:
-                case 157:
-                case 269:
-                    return bindFunctionOrConstructorType(node);
-                case 159:
-                case 265:
-                    return bindAnonymousDeclaration(node, 2048, "__type");
-                case 171:
-                    return bindObjectLiteralExpression(node);
-                case 179:
-                case 180:
-                    return bindFunctionExpression(node);
-                case 174:
-                    if (ts.isInJavaScriptFile(node)) {
-                        bindCallExpression(node);
-                    }
-                    break;
-                case 192:
-                case 221:
-                    return bindClassLikeDeclaration(node);
-                case 222:
-                    return bindBlockScopedDeclaration(node, 64, 792960);
-                case 223:
-                    return bindBlockScopedDeclaration(node, 524288, 793056);
-                case 224:
-                    return bindEnumDeclaration(node);
-                case 225:
-                    return bindModuleDeclaration(node);
-                case 229:
-                case 232:
-                case 234:
-                case 238:
-                    return declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
-                case 228:
-                    return bindNamespaceExportDeclaration(node);
-                case 231:
-                    return bindImportClause(node);
-                case 236:
-                    return bindExportDeclaration(node);
-                case 235:
-                    return bindExportAssignment(node);
-                case 256:
-                    return bindSourceFileIfExternalModule();
-            }
-        }
-        function checkTypePredicate(node) {
-            var parameterName = node.parameterName, type = node.type;
-            if (parameterName && parameterName.kind === 69) {
-                checkStrictModeIdentifier(parameterName);
-            }
-            if (parameterName && parameterName.kind === 165) {
-                seenThisKeyword = true;
-            }
-            bind(type);
-        }
-        function bindSourceFileIfExternalModule() {
-            setExportContextFlag(file);
-            if (ts.isExternalModule(file)) {
-                bindSourceFileAsExternalModule();
-            }
-        }
-        function bindSourceFileAsExternalModule() {
-            bindAnonymousDeclaration(file, 512, "\"" + ts.removeFileExtension(file.fileName) + "\"");
-        }
-        function bindExportAssignment(node) {
-            var boundExpression = node.kind === 235 ? node.expression : node.right;
-            if (!container.symbol || !container.symbol.exports) {
-                bindAnonymousDeclaration(node, 8388608, getDeclarationName(node));
-            }
-            else if (boundExpression.kind === 69 && node.kind === 235) {
-                declareSymbol(container.symbol.exports, container.symbol, node, 8388608, 0 | 8388608);
-            }
-            else {
-                declareSymbol(container.symbol.exports, container.symbol, node, 4, 0 | 8388608);
-            }
-        }
-        function bindNamespaceExportDeclaration(node) {
-            if (node.modifiers && node.modifiers.length) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
-            }
-            if (node.parent.kind !== 256) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
-                return;
-            }
-            else {
-                var parent_5 = node.parent;
-                if (!ts.isExternalModule(parent_5)) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
-                    return;
-                }
-                if (!parent_5.isDeclarationFile) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
-                    return;
-                }
-            }
-            file.symbol.globalExports = file.symbol.globalExports || {};
-            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608, 8388608);
-        }
-        function bindExportDeclaration(node) {
-            if (!container.symbol || !container.symbol.exports) {
-                bindAnonymousDeclaration(node, 1073741824, getDeclarationName(node));
-            }
-            else if (!node.exportClause) {
-                declareSymbol(container.symbol.exports, container.symbol, node, 1073741824, 0);
-            }
-        }
-        function bindImportClause(node) {
-            if (node.name) {
-                declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
-            }
-        }
-        function setCommonJsModuleIndicator(node) {
-            if (!file.commonJsModuleIndicator) {
-                file.commonJsModuleIndicator = node;
-                bindSourceFileAsExternalModule();
-            }
-        }
-        function bindExportsPropertyAssignment(node) {
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 | 7340032, 0);
-        }
-        function bindModuleExportsAssignment(node) {
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node, 4 | 7340032 | 512, 0);
-        }
-        function bindThisPropertyAssignment(node) {
-            if (container.kind === 179 || container.kind === 220) {
-                container.symbol.members = container.symbol.members || {};
-                declareSymbol(container.symbol.members, container.symbol, node, 4, 0 & ~4);
-            }
-        }
-        function bindPrototypePropertyAssignment(node) {
-            var leftSideOfAssignment = node.left;
-            var classPrototype = leftSideOfAssignment.expression;
-            var constructorFunction = classPrototype.expression;
-            leftSideOfAssignment.parent = node;
-            constructorFunction.parent = classPrototype;
-            classPrototype.parent = leftSideOfAssignment;
-            var funcSymbol = container.locals[constructorFunction.text];
-            if (!funcSymbol || !(funcSymbol.flags & 16)) {
-                return;
-            }
-            if (!funcSymbol.members) {
-                funcSymbol.members = {};
-            }
-            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4, 0);
-        }
-        function bindCallExpression(node) {
-            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, false)) {
-                setCommonJsModuleIndicator(node);
-            }
-        }
-        function bindClassLikeDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.getClassExtendsHeritageClauseElement(node) !== undefined) {
-                    hasClassExtends = true;
-                }
-                if (ts.nodeIsDecorated(node)) {
-                    hasDecorators = true;
-                }
-            }
-            if (node.kind === 221) {
-                bindBlockScopedDeclaration(node, 32, 899519);
-            }
-            else {
-                var bindingName = node.name ? node.name.text : "__class";
-                bindAnonymousDeclaration(node, 32, bindingName);
-                if (node.name) {
-                    classifiableNames[node.name.text] = node.name.text;
-                }
-            }
-            var symbol = node.symbol;
-            var prototypeSymbol = createSymbol(4 | 134217728, "prototype");
-            if (ts.hasProperty(symbol.exports, prototypeSymbol.name)) {
-                if (node.name) {
-                    node.name.parent = node;
-                }
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
-            }
-            symbol.exports[prototypeSymbol.name] = prototypeSymbol;
-            prototypeSymbol.parent = symbol;
-        }
-        function bindEnumDeclaration(node) {
-            return ts.isConst(node)
-                ? bindBlockScopedDeclaration(node, 128, 899967)
-                : bindBlockScopedDeclaration(node, 256, 899327);
-        }
-        function bindVariableDeclarationOrBindingElement(node) {
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-            if (!ts.isBindingPattern(node.name)) {
-                if (ts.isBlockOrCatchScoped(node)) {
-                    bindBlockScopedVariableDeclaration(node);
-                }
-                else if (ts.isParameterDeclaration(node)) {
-                    declareSymbolAndAddToSymbolTable(node, 1, 107455);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 1, 107454);
-                }
-            }
-        }
-        function bindParameter(node) {
-            if (!ts.isDeclarationFile(file) &&
-                !ts.isInAmbientContext(node) &&
-                ts.nodeIsDecorated(node)) {
-                hasDecorators = true;
-                hasParameterDecorators = true;
-            }
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-            if (ts.isBindingPattern(node.name)) {
-                bindAnonymousDeclaration(node, 1, getDestructuringParameterName(node));
-            }
-            else {
-                declareSymbolAndAddToSymbolTable(node, 1, 107455);
-            }
-            if (ts.isParameterPropertyDeclaration(node)) {
-                var classDeclaration = node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4, 0);
-            }
-        }
-        function bindFunctionDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-            }
-            checkStrictModeFunctionName(node);
-            if (inStrictMode) {
-                checkStrictModeFunctionDeclaration(node);
-                return bindBlockScopedDeclaration(node, 16, 106927);
-            }
-            else {
-                return declareSymbolAndAddToSymbolTable(node, 16, 106927);
-            }
-        }
-        function bindFunctionExpression(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-            }
-            checkStrictModeFunctionName(node);
-            var bindingName = node.name ? node.name.text : "__function";
-            return bindAnonymousDeclaration(node, 16, bindingName);
-        }
-        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-                if (ts.nodeIsDecorated(node)) {
-                    hasDecorators = true;
-                }
-            }
-            return ts.hasDynamicName(node)
-                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
-                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
-        }
-        function shouldReportErrorOnModuleDeclaration(node) {
-            var instanceState = getModuleInstanceState(node);
-            return instanceState === 1 || (instanceState === 2 && options.preserveConstEnums);
-        }
-        function checkUnreachable(node) {
-            if (!(currentFlow.flags & 1)) {
-                return false;
-            }
-            if (currentFlow === unreachableFlow) {
-                var reportError = (ts.isStatement(node) && node.kind !== 201) ||
-                    node.kind === 221 ||
-                    (node.kind === 225 && shouldReportErrorOnModuleDeclaration(node)) ||
-                    (node.kind === 224 && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
-                if (reportError) {
-                    currentFlow = reportedUnreachableFlow;
-                    var reportUnreachableCode = !options.allowUnreachableCode &&
-                        !ts.isInAmbientContext(node) &&
-                        (node.kind !== 200 ||
-                            ts.getCombinedNodeFlags(node.declarationList) & 3072 ||
-                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
-                    if (reportUnreachableCode) {
-                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
-                    }
-                }
-            }
-            return true;
-        }
-    }
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var nextSymbolId = 1;
-    var nextNodeId = 1;
-    var nextMergeId = 1;
-    var nextFlowId = 1;
-    function getNodeId(node) {
-        if (!node.id) {
-            node.id = nextNodeId;
-            nextNodeId++;
-        }
-        return node.id;
-    }
-    ts.getNodeId = getNodeId;
-    ts.checkTime = 0;
-    function getSymbolId(symbol) {
-        if (!symbol.id) {
-            symbol.id = nextSymbolId;
-            nextSymbolId++;
-        }
-        return symbol.id;
-    }
-    ts.getSymbolId = getSymbolId;
-    function createTypeChecker(host, produceDiagnostics) {
-        var cancellationToken;
-        var Symbol = ts.objectAllocator.getSymbolConstructor();
-        var Type = ts.objectAllocator.getTypeConstructor();
-        var Signature = ts.objectAllocator.getSignatureConstructor();
-        var typeCount = 0;
-        var symbolCount = 0;
-        var emptyArray = [];
-        var emptySymbols = {};
-        var compilerOptions = host.getCompilerOptions();
-        var languageVersion = compilerOptions.target || 0;
-        var modulekind = ts.getEmitModuleKind(compilerOptions);
-        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
-        var strictNullChecks = compilerOptions.strictNullChecks;
-        var emitResolver = createResolver();
-        var undefinedSymbol = createSymbol(4 | 67108864, "undefined");
-        undefinedSymbol.declarations = [];
-        var argumentsSymbol = createSymbol(4 | 67108864, "arguments");
-        var checker = {
-            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
-            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
-            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
-            getTypeCount: function () { return typeCount; },
-            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
-            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
-            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
-            getDiagnostics: getDiagnostics,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getTypeOfSymbolAtLocation: getTypeOfSymbolAtLocation,
-            getSymbolsOfParameterPropertyDeclaration: getSymbolsOfParameterPropertyDeclaration,
-            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
-            getPropertiesOfType: getPropertiesOfType,
-            getPropertyOfType: getPropertyOfType,
-            getSignaturesOfType: getSignaturesOfType,
-            getIndexTypeOfType: getIndexTypeOfType,
-            getBaseTypes: getBaseTypes,
-            getReturnTypeOfSignature: getReturnTypeOfSignature,
-            getNonNullableType: getNonNullableType,
-            getSymbolsInScope: getSymbolsInScope,
-            getSymbolAtLocation: getSymbolAtLocation,
-            getShorthandAssignmentValueSymbol: getShorthandAssignmentValueSymbol,
-            getExportSpecifierLocalTargetSymbol: getExportSpecifierLocalTargetSymbol,
-            getTypeAtLocation: getTypeOfNode,
-            getPropertySymbolOfDestructuringAssignment: getPropertySymbolOfDestructuringAssignment,
-            typeToString: typeToString,
-            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
-            symbolToString: symbolToString,
-            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
-            getRootSymbols: getRootSymbols,
-            getContextualType: getContextualType,
-            getFullyQualifiedName: getFullyQualifiedName,
-            getResolvedSignature: getResolvedSignature,
-            getConstantValue: getConstantValue,
-            isValidPropertyAccess: isValidPropertyAccess,
-            getSignatureFromDeclaration: getSignatureFromDeclaration,
-            isImplementationOfOverload: isImplementationOfOverload,
-            getAliasedSymbol: resolveAlias,
-            getEmitResolver: getEmitResolver,
-            getExportsOfModule: getExportsOfModuleAsArray,
-            getJsxElementAttributesType: getJsxElementAttributesType,
-            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
-            isOptionalParameter: isOptionalParameter
-        };
-        var unknownSymbol = createSymbol(4 | 67108864, "unknown");
-        var resolvingSymbol = createSymbol(67108864, "__resolving__");
-        var nullableWideningFlags = strictNullChecks ? 0 : 2097152;
-        var anyType = createIntrinsicType(1, "any");
-        var stringType = createIntrinsicType(2, "string");
-        var numberType = createIntrinsicType(4, "number");
-        var booleanType = createIntrinsicType(8, "boolean");
-        var esSymbolType = createIntrinsicType(16777216, "symbol");
-        var voidType = createIntrinsicType(16, "void");
-        var undefinedType = createIntrinsicType(32 | nullableWideningFlags, "undefined");
-        var nullType = createIntrinsicType(64 | nullableWideningFlags, "null");
-        var emptyArrayElementType = createIntrinsicType(32 | 2097152, "undefined");
-        var unknownType = createIntrinsicType(1, "unknown");
-        var neverType = createIntrinsicType(134217728, "never");
-        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        emptyGenericType.instantiations = {};
-        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        anyFunctionType.flags |= 8388608;
-        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, undefined, 0, false, false);
-        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, undefined, 0, false, false);
-        var enumNumberIndexInfo = createIndexInfo(stringType, true);
-        var globals = {};
-        var getGlobalESSymbolConstructorSymbol;
-        var getGlobalPromiseConstructorSymbol;
-        var globalObjectType;
-        var globalFunctionType;
-        var globalArrayType;
-        var globalReadonlyArrayType;
-        var globalStringType;
-        var globalNumberType;
-        var globalBooleanType;
-        var globalRegExpType;
-        var anyArrayType;
-        var anyReadonlyArrayType;
-        var getGlobalTemplateStringsArrayType;
-        var getGlobalESSymbolType;
-        var getGlobalIterableType;
-        var getGlobalIteratorType;
-        var getGlobalIterableIteratorType;
-        var getGlobalClassDecoratorType;
-        var getGlobalParameterDecoratorType;
-        var getGlobalPropertyDecoratorType;
-        var getGlobalMethodDecoratorType;
-        var getGlobalTypedPropertyDescriptorType;
-        var getGlobalPromiseType;
-        var tryGetGlobalPromiseType;
-        var getGlobalPromiseLikeType;
-        var getInstantiatedGlobalPromiseLikeType;
-        var getGlobalPromiseConstructorLikeType;
-        var getGlobalThenableType;
-        var jsxElementClassType;
-        var deferredNodes;
-        var flowLoopStart = 0;
-        var flowLoopCount = 0;
-        var visitedFlowCount = 0;
-        var tupleTypes = {};
-        var unionTypes = {};
-        var intersectionTypes = {};
-        var stringLiteralTypes = {};
-        var resolutionTargets = [];
-        var resolutionResults = [];
-        var resolutionPropertyNames = [];
-        var mergedSymbols = [];
-        var symbolLinks = [];
-        var nodeLinks = [];
-        var flowLoopCaches = [];
-        var flowLoopNodes = [];
-        var flowLoopKeys = [];
-        var flowLoopTypes = [];
-        var visitedFlowNodes = [];
-        var visitedFlowTypes = [];
-        var potentialThisCollisions = [];
-        var awaitedTypeStack = [];
-        var diagnostics = ts.createDiagnosticCollection();
-        var typeofEQFacts = {
-            "string": 1,
-            "number": 2,
-            "boolean": 4,
-            "symbol": 8,
-            "undefined": 16384,
-            "object": 16,
-            "function": 32
-        };
-        var typeofNEFacts = {
-            "string": 128,
-            "number": 256,
-            "boolean": 512,
-            "symbol": 1024,
-            "undefined": 131072,
-            "object": 2048,
-            "function": 4096
-        };
-        var typeofTypesByName = {
-            "string": stringType,
-            "number": numberType,
-            "boolean": booleanType,
-            "symbol": esSymbolType,
-            "undefined": undefinedType
-        };
-        var jsxElementType;
-        var jsxTypes = {};
-        var JsxNames = {
-            JSX: "JSX",
-            IntrinsicElements: "IntrinsicElements",
-            ElementClass: "ElementClass",
-            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
-            Element: "Element",
-            IntrinsicAttributes: "IntrinsicAttributes",
-            IntrinsicClassAttributes: "IntrinsicClassAttributes"
-        };
-        var subtypeRelation = {};
-        var assignableRelation = {};
-        var comparableRelation = {};
-        var identityRelation = {};
-        var _displayBuilder;
-        var builtinGlobals = (_a = {},
-            _a[undefinedSymbol.name] = undefinedSymbol,
-            _a
-        );
-        initializeTypeChecker();
-        return checker;
-        function getEmitResolver(sourceFile, cancellationToken) {
-            getDiagnostics(sourceFile, cancellationToken);
-            return emitResolver;
-        }
-        function error(location, message, arg0, arg1, arg2) {
-            var diagnostic = location
-                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
-                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
-            diagnostics.add(diagnostic);
-        }
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
-        }
-        function getExcludedSymbolFlags(flags) {
-            var result = 0;
-            if (flags & 2)
-                result |= 107455;
-            if (flags & 1)
-                result |= 107454;
-            if (flags & 4)
-                result |= 0;
-            if (flags & 8)
-                result |= 107455;
-            if (flags & 16)
-                result |= 106927;
-            if (flags & 32)
-                result |= 899519;
-            if (flags & 64)
-                result |= 792960;
-            if (flags & 256)
-                result |= 899327;
-            if (flags & 128)
-                result |= 899967;
-            if (flags & 512)
-                result |= 106639;
-            if (flags & 8192)
-                result |= 99263;
-            if (flags & 32768)
-                result |= 41919;
-            if (flags & 65536)
-                result |= 74687;
-            if (flags & 262144)
-                result |= 530912;
-            if (flags & 524288)
-                result |= 793056;
-            if (flags & 8388608)
-                result |= 8388608;
-            return result;
-        }
-        function recordMergedSymbol(target, source) {
-            if (!source.mergeId) {
-                source.mergeId = nextMergeId;
-                nextMergeId++;
-            }
-            mergedSymbols[source.mergeId] = target;
-        }
-        function cloneSymbol(symbol) {
-            var result = createSymbol(symbol.flags | 33554432, symbol.name);
-            result.declarations = symbol.declarations.slice(0);
-            result.parent = symbol.parent;
-            if (symbol.valueDeclaration)
-                result.valueDeclaration = symbol.valueDeclaration;
-            if (symbol.constEnumOnlyModule)
-                result.constEnumOnlyModule = true;
-            if (symbol.members)
-                result.members = cloneSymbolTable(symbol.members);
-            if (symbol.exports)
-                result.exports = cloneSymbolTable(symbol.exports);
-            recordMergedSymbol(result, symbol);
-            return result;
-        }
-        function mergeSymbol(target, source) {
-            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
-                if (source.flags & 512 && target.flags & 512 && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
-                    target.constEnumOnlyModule = false;
-                }
-                target.flags |= source.flags;
-                if (source.valueDeclaration &&
-                    (!target.valueDeclaration ||
-                        (target.valueDeclaration.kind === 225 && source.valueDeclaration.kind !== 225))) {
-                    target.valueDeclaration = source.valueDeclaration;
-                }
-                ts.forEach(source.declarations, function (node) {
-                    target.declarations.push(node);
-                });
-                if (source.members) {
-                    if (!target.members)
-                        target.members = {};
-                    mergeSymbolTable(target.members, source.members);
-                }
-                if (source.exports) {
-                    if (!target.exports)
-                        target.exports = {};
-                    mergeSymbolTable(target.exports, source.exports);
-                }
-                recordMergedSymbol(target, source);
-            }
-            else {
-                var message_2 = target.flags & 2 || source.flags & 2
-                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
-                ts.forEach(source.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
-                ts.forEach(target.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
-            }
-        }
-        function cloneSymbolTable(symbolTable) {
-            var result = {};
-            for (var id in symbolTable) {
-                if (ts.hasProperty(symbolTable, id)) {
-                    result[id] = symbolTable[id];
-                }
-            }
-            return result;
-        }
-        function mergeSymbolTable(target, source) {
-            for (var id in source) {
-                if (ts.hasProperty(source, id)) {
-                    if (!ts.hasProperty(target, id)) {
-                        target[id] = source[id];
-                    }
-                    else {
-                        var symbol = target[id];
-                        if (!(symbol.flags & 33554432)) {
-                            target[id] = symbol = cloneSymbol(symbol);
-                        }
-                        mergeSymbol(symbol, source[id]);
-                    }
-                }
-            }
-        }
-        function mergeModuleAugmentation(moduleName) {
-            var moduleAugmentation = moduleName.parent;
-            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
-                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
-                return;
-            }
-            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
-                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
-            }
-            else {
-                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
-                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
-                    : undefined;
-                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError);
-                if (!mainModule) {
-                    return;
-                }
-                mainModule = resolveExternalModuleSymbol(mainModule);
-                if (mainModule.flags & 1536) {
-                    mainModule = mainModule.flags & 33554432 ? mainModule : cloneSymbol(mainModule);
-                    mergeSymbol(mainModule, moduleAugmentation.symbol);
-                }
-                else {
-                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
-                }
-            }
-        }
-        function addToSymbolTable(target, source, message) {
-            for (var id in source) {
-                if (ts.hasProperty(source, id)) {
-                    if (ts.hasProperty(target, id)) {
-                        ts.forEach(target[id].declarations, addDeclarationDiagnostic(id, message));
-                    }
-                    else {
-                        target[id] = source[id];
-                    }
-                }
-            }
-            function addDeclarationDiagnostic(id, message) {
-                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
-            }
-        }
-        function getSymbolLinks(symbol) {
-            if (symbol.flags & 67108864)
-                return symbol;
-            var id = getSymbolId(symbol);
-            return symbolLinks[id] || (symbolLinks[id] = {});
-        }
-        function getNodeLinks(node) {
-            var nodeId = getNodeId(node);
-            return nodeLinks[nodeId] || (nodeLinks[nodeId] = {});
-        }
-        function isGlobalSourceFile(node) {
-            return node.kind === 256 && !ts.isExternalOrCommonJsModule(node);
-        }
-        function getSymbol(symbols, name, meaning) {
-            if (meaning && ts.hasProperty(symbols, name)) {
-                var symbol = symbols[name];
-                ts.Debug.assert((symbol.flags & 16777216) === 0, "Should never get an instantiated symbol here.");
-                if (symbol.flags & meaning) {
-                    return symbol;
-                }
-                if (symbol.flags & 8388608) {
-                    var target = resolveAlias(symbol);
-                    if (target === unknownSymbol || target.flags & meaning) {
-                        return symbol;
-                    }
-                }
-            }
-        }
-        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
-            var constructorDeclaration = parameter.parent;
-            var classDeclaration = parameter.parent.parent;
-            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455);
-            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455);
-            if (parameterSymbol && propertySymbol) {
-                return [parameterSymbol, propertySymbol];
-            }
-            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
-        }
-        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
-            var declarationFile = ts.getSourceFileOfNode(declaration);
-            var useFile = ts.getSourceFileOfNode(usage);
-            if (declarationFile !== useFile) {
-                if (modulekind || (!compilerOptions.outFile && !compilerOptions.out)) {
-                    return true;
-                }
-                var sourceFiles = host.getSourceFiles();
-                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
-            }
-            if (declaration.pos <= usage.pos) {
-                return declaration.kind !== 218 ||
-                    !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
-            }
-            return isUsedInFunctionOrNonStaticProperty(declaration, usage);
-            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                switch (declaration.parent.parent.kind) {
-                    case 200:
-                    case 206:
-                    case 208:
-                        if (isSameScopeDescendentOf(usage, declaration, container)) {
-                            return true;
-                        }
-                        break;
-                }
-                switch (declaration.parent.parent.kind) {
-                    case 207:
-                    case 208:
-                        if (isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container)) {
-                            return true;
-                        }
-                }
-                return false;
-            }
-            function isUsedInFunctionOrNonStaticProperty(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                var current = usage;
-                while (current) {
-                    if (current === container) {
-                        return false;
-                    }
-                    if (ts.isFunctionLike(current)) {
-                        return true;
-                    }
-                    var initializerOfNonStaticProperty = current.parent &&
-                        current.parent.kind === 145 &&
-                        (current.parent.flags & 32) === 0 &&
-                        current.parent.initializer === current;
-                    if (initializerOfNonStaticProperty) {
-                        return true;
-                    }
-                    current = current.parent;
-                }
-                return false;
-            }
-        }
-        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg) {
-            var result;
-            var lastLocation;
-            var propertyWithInvalidInitializer;
-            var errorLocation = location;
-            var grandparent;
-            var isInExternalModule = false;
-            loop: while (location) {
-                if (location.locals && !isGlobalSourceFile(location)) {
-                    if (result = getSymbol(location.locals, name, meaning)) {
-                        var useResult = true;
-                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
-                            if (meaning & result.flags & 793056 && lastLocation.kind !== 273) {
-                                useResult = result.flags & 262144
-                                    ? lastLocation === location.type ||
-                                        lastLocation.kind === 142 ||
-                                        lastLocation.kind === 141
-                                    : false;
-                            }
-                            if (meaning & 107455 && result.flags & 1) {
-                                useResult =
-                                    lastLocation.kind === 142 ||
-                                        (lastLocation === location.type &&
-                                            result.valueDeclaration.kind === 142);
-                            }
-                        }
-                        if (useResult) {
-                            break loop;
-                        }
-                        else {
-                            result = undefined;
-                        }
-                    }
-                }
-                switch (location.kind) {
-                    case 256:
-                        if (!ts.isExternalOrCommonJsModule(location))
-                            break;
-                        isInExternalModule = true;
-                    case 225:
-                        var moduleExports = getSymbolOfNode(location).exports;
-                        if (location.kind === 256 || ts.isAmbientModule(location)) {
-                            if (result = moduleExports["default"]) {
-                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
-                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
-                                    break loop;
-                                }
-                                result = undefined;
-                            }
-                            if (ts.hasProperty(moduleExports, name) &&
-                                moduleExports[name].flags === 8388608 &&
-                                ts.getDeclarationOfKind(moduleExports[name], 238)) {
-                                break;
-                            }
-                        }
-                        if (result = getSymbol(moduleExports, name, meaning & 8914931)) {
-                            break loop;
-                        }
-                        break;
-                    case 224:
-                        if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & 8)) {
-                            break loop;
-                        }
-                        break;
-                    case 145:
-                    case 144:
-                        if (ts.isClassLike(location.parent) && !(location.flags & 32)) {
-                            var ctor = findConstructorDeclaration(location.parent);
-                            if (ctor && ctor.locals) {
-                                if (getSymbol(ctor.locals, name, meaning & 107455)) {
-                                    propertyWithInvalidInitializer = location;
-                                }
-                            }
-                        }
-                        break;
-                    case 221:
-                    case 192:
-                    case 222:
-                        if (result = getSymbol(getSymbolOfNode(location).members, name, meaning & 793056)) {
-                            if (lastLocation && lastLocation.flags & 32) {
-                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
-                                return undefined;
-                            }
-                            break loop;
-                        }
-                        if (location.kind === 192 && meaning & 32) {
-                            var className = location.name;
-                            if (className && name === className.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    case 140:
-                        grandparent = location.parent.parent;
-                        if (ts.isClassLike(grandparent) || grandparent.kind === 222) {
-                            if (result = getSymbol(getSymbolOfNode(grandparent).members, name, meaning & 793056)) {
-                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
-                                return undefined;
-                            }
-                        }
-                        break;
-                    case 147:
-                    case 146:
-                    case 148:
-                    case 149:
-                    case 150:
-                    case 220:
-                    case 180:
-                        if (meaning & 3 && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        break;
-                    case 179:
-                        if (meaning & 3 && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        if (meaning & 16) {
-                            var functionName = location.name;
-                            if (functionName && name === functionName.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    case 143:
-                        if (location.parent && location.parent.kind === 142) {
-                            location = location.parent;
-                        }
-                        if (location.parent && ts.isClassElement(location.parent)) {
-                            location = location.parent;
-                        }
-                        break;
-                }
-                lastLocation = location;
-                location = location.parent;
-            }
-            if (!result) {
-                result = getSymbol(globals, name, meaning);
-            }
-            if (!result) {
-                if (nameNotFoundMessage) {
-                    if (!checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg)) {
-                        error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    }
-                }
-                return undefined;
-            }
-            if (nameNotFoundMessage) {
-                if (propertyWithInvalidInitializer) {
-                    var propertyName = propertyWithInvalidInitializer.name;
-                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    return undefined;
-                }
-                if (meaning & 2) {
-                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
-                    if (exportOrLocalSymbol.flags & 2) {
-                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
-                    }
-                }
-                if (result && isInExternalModule) {
-                    var decls = result.declarations;
-                    if (decls && decls.length === 1 && decls[0].kind === 228) {
-                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
-                    }
-                }
-            }
-            return result;
-        }
-        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
-            if (!errorLocation || (errorLocation.kind === 69 && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
-                return false;
-            }
-            var container = ts.getThisContainer(errorLocation, true);
-            var location = container;
-            while (location) {
-                if (ts.isClassLike(location.parent)) {
-                    var classSymbol = getSymbolOfNode(location.parent);
-                    if (!classSymbol) {
-                        break;
-                    }
-                    var constructorType = getTypeOfSymbol(classSymbol);
-                    if (getPropertyOfType(constructorType, name)) {
-                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
-                        return true;
-                    }
-                    if (location === container && !(location.flags & 32)) {
-                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
-                        if (getPropertyOfType(instanceType, name)) {
-                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                            return true;
-                        }
-                    }
-                }
-                location = location.parent;
-            }
-            return false;
-        }
-        function checkResolvedBlockScopedVariable(result, errorLocation) {
-            ts.Debug.assert((result.flags & 2) !== 0);
-            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) ? d : undefined; });
-            ts.Debug.assert(declaration !== undefined, "Block-scoped variable declaration is undefined");
-            if (!isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 218), errorLocation)) {
-                error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
-            }
-        }
-        function isSameScopeDescendentOf(initial, parent, stopAt) {
-            if (!parent) {
-                return false;
-            }
-            for (var current = initial; current && current !== stopAt && !ts.isFunctionLike(current); current = current.parent) {
-                if (current === parent) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function getAnyImportSyntax(node) {
-            if (ts.isAliasSymbolDeclaration(node)) {
-                if (node.kind === 229) {
-                    return node;
-                }
-                while (node && node.kind !== 230) {
-                    node = node.parent;
-                }
-                return node;
-            }
-        }
-        function getDeclarationOfAliasSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isAliasSymbolDeclaration(d) ? d : undefined; });
-        }
-        function getTargetOfImportEqualsDeclaration(node) {
-            if (node.moduleReference.kind === 240) {
-                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
-            }
-            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, node);
-        }
-        function getTargetOfImportClause(node) {
-            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
-            if (moduleSymbol) {
-                var exportDefaultSymbol = moduleSymbol.exports["export="] ?
-                    getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
-                    resolveSymbol(moduleSymbol.exports["default"]);
-                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
-                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
-                }
-                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
-                    return resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
-                }
-                return exportDefaultSymbol;
-            }
-        }
-        function getTargetOfNamespaceImport(node) {
-            var moduleSpecifier = node.parent.parent.moduleSpecifier;
-            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier);
-        }
-        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
-            if (valueSymbol.flags & (793056 | 1536)) {
-                return valueSymbol;
-            }
-            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
-            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
-            result.parent = valueSymbol.parent || typeSymbol.parent;
-            if (valueSymbol.valueDeclaration)
-                result.valueDeclaration = valueSymbol.valueDeclaration;
-            if (typeSymbol.members)
-                result.members = typeSymbol.members;
-            if (valueSymbol.exports)
-                result.exports = valueSymbol.exports;
-            return result;
-        }
-        function getExportOfModule(symbol, name) {
-            if (symbol.flags & 1536) {
-                var exports = getExportsOfSymbol(symbol);
-                if (ts.hasProperty(exports, name)) {
-                    return resolveSymbol(exports[name]);
-                }
-            }
-        }
-        function getPropertyOfVariable(symbol, name) {
-            if (symbol.flags & 3) {
-                var typeAnnotation = symbol.valueDeclaration.type;
-                if (typeAnnotation) {
-                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
-                }
-            }
-        }
-        function getExternalModuleMember(node, specifier) {
-            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier);
-            if (targetSymbol) {
-                var name_9 = specifier.propertyName || specifier.name;
-                if (name_9.text) {
-                    var symbolFromVariable = void 0;
-                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
-                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_9.text);
-                    }
-                    else {
-                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_9.text);
-                    }
-                    symbolFromVariable = resolveSymbol(symbolFromVariable);
-                    var symbolFromModule = getExportOfModule(targetSymbol, name_9.text);
-                    var symbol = symbolFromModule && symbolFromVariable ?
-                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
-                        symbolFromModule || symbolFromVariable;
-                    if (!symbol) {
-                        error(name_9, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_9));
-                    }
-                    return symbol;
-                }
-            }
-        }
-        function getTargetOfImportSpecifier(node) {
-            return getExternalModuleMember(node.parent.parent.parent, node);
-        }
-        function getTargetOfGlobalModuleExportDeclaration(node) {
-            return resolveExternalModuleSymbol(node.parent.symbol);
-        }
-        function getTargetOfExportSpecifier(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 | 793056 | 1536);
-        }
-        function getTargetOfExportAssignment(node) {
-            return resolveEntityName(node.expression, 107455 | 793056 | 1536);
-        }
-        function getTargetOfAliasDeclaration(node) {
-            switch (node.kind) {
-                case 229:
-                    return getTargetOfImportEqualsDeclaration(node);
-                case 231:
-                    return getTargetOfImportClause(node);
-                case 232:
-                    return getTargetOfNamespaceImport(node);
-                case 234:
-                    return getTargetOfImportSpecifier(node);
-                case 238:
-                    return getTargetOfExportSpecifier(node);
-                case 235:
-                    return getTargetOfExportAssignment(node);
-                case 228:
-                    return getTargetOfGlobalModuleExportDeclaration(node);
-            }
-        }
-        function resolveSymbol(symbol) {
-            return symbol && symbol.flags & 8388608 && !(symbol.flags & (107455 | 793056 | 1536)) ? resolveAlias(symbol) : symbol;
-        }
-        function resolveAlias(symbol) {
-            ts.Debug.assert((symbol.flags & 8388608) !== 0, "Should only get Alias here.");
-            var links = getSymbolLinks(symbol);
-            if (!links.target) {
-                links.target = resolvingSymbol;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                var target = getTargetOfAliasDeclaration(node);
-                if (links.target === resolvingSymbol) {
-                    links.target = target || unknownSymbol;
-                }
-                else {
-                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
-                }
-            }
-            else if (links.target === resolvingSymbol) {
-                links.target = unknownSymbol;
-            }
-            return links.target;
-        }
-        function markExportAsReferenced(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target) {
-                var markAlias = target === unknownSymbol ||
-                    ((target.flags & 107455) && !isConstEnumOrConstEnumOnlyModule(target));
-                if (markAlias) {
-                    markAliasSymbolAsReferenced(symbol);
-                }
-            }
-        }
-        function markAliasSymbolAsReferenced(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.referenced) {
-                links.referenced = true;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                if (node.kind === 235) {
-                    checkExpressionCached(node.expression);
-                }
-                else if (node.kind === 238) {
-                    checkExpressionCached(node.propertyName || node.name);
-                }
-                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    checkExpressionCached(node.moduleReference);
-                }
-            }
-        }
-        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importDeclaration) {
-            if (!importDeclaration) {
-                importDeclaration = ts.getAncestor(entityName, 229);
-                ts.Debug.assert(importDeclaration !== undefined);
-            }
-            if (entityName.kind === 69 && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
-            }
-            if (entityName.kind === 69 || entityName.parent.kind === 139) {
-                return resolveEntityName(entityName, 1536);
-            }
-            else {
-                ts.Debug.assert(entityName.parent.kind === 229);
-                return resolveEntityName(entityName, 107455 | 793056 | 1536);
-            }
-        }
-        function getFullyQualifiedName(symbol) {
-            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
-        }
-        function resolveEntityName(name, meaning, ignoreErrors) {
-            if (ts.nodeIsMissing(name)) {
-                return undefined;
-            }
-            var symbol;
-            if (name.kind === 69) {
-                var message = meaning === 1536 ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
-                symbol = resolveName(name, name.text, meaning, ignoreErrors ? undefined : message, name);
-                if (!symbol) {
-                    return undefined;
-                }
-            }
-            else if (name.kind === 139 || name.kind === 172) {
-                var left = name.kind === 139 ? name.left : name.expression;
-                var right = name.kind === 139 ? name.right : name.name;
-                var namespace = resolveEntityName(left, 1536, ignoreErrors);
-                if (!namespace || namespace === unknownSymbol || ts.nodeIsMissing(right)) {
-                    return undefined;
-                }
-                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
-                if (!symbol) {
-                    if (!ignoreErrors) {
-                        error(right, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
-                    }
-                    return undefined;
-                }
-            }
-            else {
-                ts.Debug.fail("Unknown entity name kind.");
-            }
-            ts.Debug.assert((symbol.flags & 16777216) === 0, "Should never get an instantiated symbol here.");
-            return symbol.flags & meaning ? symbol : resolveAlias(symbol);
-        }
-        function resolveExternalModuleName(location, moduleReferenceExpression) {
-            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
-        }
-        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError) {
-            if (moduleReferenceExpression.kind !== 9) {
-                return;
-            }
-            var moduleReferenceLiteral = moduleReferenceExpression;
-            var moduleName = ts.escapeIdentifier(moduleReferenceLiteral.text);
-            if (moduleName === undefined) {
-                return;
-            }
-            var isRelative = ts.isExternalModuleNameRelative(moduleName);
-            if (!isRelative) {
-                var symbol = getSymbol(globals, '"' + moduleName + '"', 512);
-                if (symbol) {
-                    return getMergedSymbol(symbol);
-                }
-            }
-            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReferenceLiteral.text);
-            var sourceFile = resolvedModule && host.getSourceFile(resolvedModule.resolvedFileName);
-            if (sourceFile) {
-                if (sourceFile.symbol) {
-                    return getMergedSymbol(sourceFile.symbol);
-                }
-                if (moduleNotFoundError) {
-                    error(moduleReferenceLiteral, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
-                }
-                return undefined;
-            }
-            if (moduleNotFoundError) {
-                error(moduleReferenceLiteral, moduleNotFoundError, moduleName);
-            }
-            return undefined;
-        }
-        function resolveExternalModuleSymbol(moduleSymbol) {
-            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports["export="])) || moduleSymbol;
-        }
-        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression) {
-            var symbol = resolveExternalModuleSymbol(moduleSymbol);
-            if (symbol && !(symbol.flags & (1536 | 3))) {
-                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
-                symbol = undefined;
-            }
-            return symbol;
-        }
-        function hasExportAssignmentSymbol(moduleSymbol) {
-            return moduleSymbol.exports["export="] !== undefined;
-        }
-        function getExportsOfModuleAsArray(moduleSymbol) {
-            return symbolsToArray(getExportsOfModule(moduleSymbol));
-        }
-        function getExportsOfSymbol(symbol) {
-            return symbol.flags & 1536 ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
-        }
-        function getExportsOfModule(moduleSymbol) {
-            var links = getSymbolLinks(moduleSymbol);
-            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
-        }
-        function extendExportSymbols(target, source, lookupTable, exportNode) {
-            for (var id in source) {
-                if (id !== "default" && !ts.hasProperty(target, id)) {
-                    target[id] = source[id];
-                    if (lookupTable && exportNode) {
-                        lookupTable[id] = {
-                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
-                        };
-                    }
-                }
-                else if (lookupTable && exportNode && id !== "default" && ts.hasProperty(target, id) && resolveSymbol(target[id]) !== resolveSymbol(source[id])) {
-                    if (!lookupTable[id].exportsWithDuplicate) {
-                        lookupTable[id].exportsWithDuplicate = [exportNode];
-                    }
-                    else {
-                        lookupTable[id].exportsWithDuplicate.push(exportNode);
-                    }
-                }
-            }
-        }
-        function getExportsForModule(moduleSymbol) {
-            var visitedSymbols = [];
-            return visit(moduleSymbol) || moduleSymbol.exports;
-            function visit(symbol) {
-                if (!(symbol && symbol.flags & 1952 && !ts.contains(visitedSymbols, symbol))) {
-                    return;
-                }
-                visitedSymbols.push(symbol);
-                var symbols = cloneSymbolTable(symbol.exports);
-                var exportStars = symbol.exports["__export"];
-                if (exportStars) {
-                    var nestedSymbols = {};
-                    var lookupTable = {};
-                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
-                        var node = _a[_i];
-                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
-                        var exportedSymbols = visit(resolvedModule);
-                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable, node);
-                    }
-                    for (var id in lookupTable) {
-                        var exportsWithDuplicate = lookupTable[id].exportsWithDuplicate;
-                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || ts.hasProperty(symbols, id)) {
-                            continue;
-                        }
-                        for (var _b = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _b < exportsWithDuplicate_1.length; _b++) {
-                            var node = exportsWithDuplicate_1[_b];
-                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable[id].specifierText, id));
-                        }
-                    }
-                    extendExportSymbols(symbols, nestedSymbols);
-                }
-                return symbols;
-            }
-        }
-        function getMergedSymbol(symbol) {
-            var merged;
-            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
-        }
-        function getSymbolOfNode(node) {
-            return getMergedSymbol(node.symbol);
-        }
-        function getParentOfSymbol(symbol) {
-            return getMergedSymbol(symbol.parent);
-        }
-        function getExportSymbolOfValueSymbolIfExported(symbol) {
-            return symbol && (symbol.flags & 1048576) !== 0
-                ? getMergedSymbol(symbol.exportSymbol)
-                : symbol;
-        }
-        function symbolIsValue(symbol) {
-            if (symbol.flags & 16777216) {
-                return symbolIsValue(getSymbolLinks(symbol).target);
-            }
-            if (symbol.flags & 107455) {
-                return true;
-            }
-            if (symbol.flags & 8388608) {
-                return (resolveAlias(symbol).flags & 107455) !== 0;
-            }
-            return false;
-        }
-        function findConstructorDeclaration(node) {
-            var members = node.members;
-            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
-                var member = members_1[_i];
-                if (member.kind === 148 && ts.nodeIsPresent(member.body)) {
-                    return member;
-                }
-            }
-        }
-        function createType(flags) {
-            var result = new Type(checker, flags);
-            result.id = typeCount;
-            typeCount++;
-            return result;
-        }
-        function createIntrinsicType(kind, intrinsicName) {
-            var type = createType(kind);
-            type.intrinsicName = intrinsicName;
-            return type;
-        }
-        function createObjectType(kind, symbol) {
-            var type = createType(kind);
-            type.symbol = symbol;
-            return type;
-        }
-        function isReservedMemberName(name) {
-            return name.charCodeAt(0) === 95 &&
-                name.charCodeAt(1) === 95 &&
-                name.charCodeAt(2) !== 95 &&
-                name.charCodeAt(2) !== 64;
-        }
-        function getNamedMembers(members) {
-            var result;
-            for (var id in members) {
-                if (ts.hasProperty(members, id)) {
-                    if (!isReservedMemberName(id)) {
-                        if (!result)
-                            result = [];
-                        var symbol = members[id];
-                        if (symbolIsValue(symbol)) {
-                            result.push(symbol);
-                        }
-                    }
-                }
-            }
-            return result || emptyArray;
-        }
-        function setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            type.members = members;
-            type.properties = getNamedMembers(members);
-            type.callSignatures = callSignatures;
-            type.constructSignatures = constructSignatures;
-            if (stringIndexInfo)
-                type.stringIndexInfo = stringIndexInfo;
-            if (numberIndexInfo)
-                type.numberIndexInfo = numberIndexInfo;
-            return type;
-        }
-        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            return setObjectTypeMembers(createObjectType(65536, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
-            var result;
-            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
-                if (location_1.locals && !isGlobalSourceFile(location_1)) {
-                    if (result = callback(location_1.locals)) {
-                        return result;
-                    }
-                }
-                switch (location_1.kind) {
-                    case 256:
-                        if (!ts.isExternalOrCommonJsModule(location_1)) {
-                            break;
-                        }
-                    case 225:
-                        if (result = callback(getSymbolOfNode(location_1).exports)) {
-                            return result;
-                        }
-                        break;
-                }
-            }
-            return callback(globals);
-        }
-        function getQualifiedLeftMeaning(rightMeaning) {
-            return rightMeaning === 107455 ? 107455 : 1536;
-        }
-        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
-            function getAccessibleSymbolChainFromSymbolTable(symbols) {
-                function canQualifySymbol(symbolFromSymbolTable, meaning) {
-                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
-                        return true;
-                    }
-                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
-                    return !!accessibleParent;
-                }
-                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
-                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
-                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
-                            canQualifySymbol(symbolFromSymbolTable, meaning);
-                    }
-                }
-                if (isAccessible(ts.lookUp(symbols, symbol.name))) {
-                    return [symbol];
-                }
-                return ts.forEachValue(symbols, function (symbolFromSymbolTable) {
-                    if (symbolFromSymbolTable.flags & 8388608
-                        && symbolFromSymbolTable.name !== "export="
-                        && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238)) {
-                        if (!useOnlyExternalAliasing ||
-                            ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
-                            var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
-                            if (isAccessible(symbolFromSymbolTable, resolveAlias(symbolFromSymbolTable))) {
-                                return [symbolFromSymbolTable];
-                            }
-                            var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTable(resolvedImportedSymbol.exports) : undefined;
-                            if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
-                                return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
-                            }
-                        }
-                    }
-                });
-            }
-            if (symbol) {
-                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
-                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
-                }
-            }
-        }
-        function needsQualification(symbol, enclosingDeclaration, meaning) {
-            var qualify = false;
-            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
-                if (!ts.hasProperty(symbolTable, symbol.name)) {
-                    return false;
-                }
-                var symbolFromSymbolTable = symbolTable[symbol.name];
-                if (symbolFromSymbolTable === symbol) {
-                    return true;
-                }
-                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
-                if (symbolFromSymbolTable.flags & meaning) {
-                    qualify = true;
-                    return true;
-                }
-                return false;
-            });
-            return qualify;
-        }
-        function isPropertyOrMethodDeclarationSymbol(symbol) {
-            if (symbol.declarations && symbol.declarations.length) {
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var declaration = _a[_i];
-                    switch (declaration.kind) {
-                        case 145:
-                        case 147:
-                        case 149:
-                        case 150:
-                            continue;
-                        default:
-                            return false;
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function isSymbolAccessible(symbol, enclosingDeclaration, meaning) {
-            if (symbol && enclosingDeclaration && !(symbol.flags & 262144)) {
-                var initialSymbol = symbol;
-                var meaningToLook = meaning;
-                while (symbol) {
-                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, false);
-                    if (accessibleSymbolChain) {
-                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0]);
-                        if (!hasAccessibleDeclarations) {
-                            return {
-                                accessibility: 1,
-                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1536) : undefined
-                            };
-                        }
-                        return hasAccessibleDeclarations;
-                    }
-                    meaningToLook = getQualifiedLeftMeaning(meaning);
-                    symbol = getParentOfSymbol(symbol);
-                }
-                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
-                if (symbolExternalModule) {
-                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
-                    if (symbolExternalModule !== enclosingExternalModule) {
-                        return {
-                            accessibility: 2,
-                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                            errorModuleName: symbolToString(symbolExternalModule)
-                        };
-                    }
-                }
-                return {
-                    accessibility: 1,
-                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning)
-                };
-            }
-            return { accessibility: 0 };
-            function getExternalModuleContainer(declaration) {
-                for (; declaration; declaration = declaration.parent) {
-                    if (hasExternalModuleSymbol(declaration)) {
-                        return getSymbolOfNode(declaration);
-                    }
-                }
-            }
-        }
-        function hasExternalModuleSymbol(declaration) {
-            return ts.isAmbientModule(declaration) || (declaration.kind === 256 && ts.isExternalOrCommonJsModule(declaration));
-        }
-        function hasVisibleDeclarations(symbol) {
-            var aliasesToMakeVisible;
-            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
-                return undefined;
-            }
-            return { accessibility: 0, aliasesToMakeVisible: aliasesToMakeVisible };
-            function getIsDeclarationVisible(declaration) {
-                if (!isDeclarationVisible(declaration)) {
-                    var anyImportSyntax = getAnyImportSyntax(declaration);
-                    if (anyImportSyntax &&
-                        !(anyImportSyntax.flags & 1) &&
-                        isDeclarationVisible(anyImportSyntax.parent)) {
-                        getNodeLinks(declaration).isVisible = true;
-                        if (aliasesToMakeVisible) {
-                            if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
-                                aliasesToMakeVisible.push(anyImportSyntax);
-                            }
-                        }
-                        else {
-                            aliasesToMakeVisible = [anyImportSyntax];
-                        }
-                        return true;
-                    }
-                    return false;
-                }
-                return true;
-            }
-        }
-        function isEntityNameVisible(entityName, enclosingDeclaration) {
-            var meaning;
-            if (entityName.parent.kind === 158 || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                meaning = 107455 | 1048576;
-            }
-            else if (entityName.kind === 139 || entityName.kind === 172 ||
-                entityName.parent.kind === 229) {
-                meaning = 1536;
-            }
-            else {
-                meaning = 793056;
-            }
-            var firstIdentifier = getFirstIdentifier(entityName);
-            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, undefined, undefined);
-            return (symbol && hasVisibleDeclarations(symbol)) || {
-                accessibility: 1,
-                errorSymbolName: ts.getTextOfNode(firstIdentifier),
-                errorNode: firstIdentifier
-            };
-        }
-        function writeKeyword(writer, kind) {
-            writer.writeKeyword(ts.tokenToString(kind));
-        }
-        function writePunctuation(writer, kind) {
-            writer.writePunctuation(ts.tokenToString(kind));
-        }
-        function writeSpace(writer) {
-            writer.writeSpace(" ");
-        }
-        function symbolToString(symbol, enclosingDeclaration, meaning) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function signatureToString(signature, enclosingDeclaration, flags, kind) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function typeToString(type, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            var maxLength = compilerOptions.noErrorTruncation || flags & 4 ? undefined : 100;
-            if (maxLength && result.length >= maxLength) {
-                result = result.substr(0, maxLength - "...".length) + "...";
-            }
-            return result;
-        }
-        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function visibilityToString(flags) {
-            if (flags === 8) {
-                return "private";
-            }
-            if (flags === 16) {
-                return "protected";
-            }
-            return "public";
-        }
-        function getTypeAliasForTypeLiteral(type) {
-            if (type.symbol && type.symbol.flags & 2048) {
-                var node = type.symbol.declarations[0].parent;
-                while (node.kind === 164) {
-                    node = node.parent;
-                }
-                if (node.kind === 223) {
-                    return getSymbolOfNode(node);
-                }
-            }
-            return undefined;
-        }
-        function isTopLevelInExternalModuleAugmentation(node) {
-            return node && node.parent &&
-                node.parent.kind === 226 &&
-                ts.isExternalModuleAugmentation(node.parent.parent);
-        }
-        function getSymbolDisplayBuilder() {
-            function getNameOfSymbol(symbol) {
-                if (symbol.declarations && symbol.declarations.length) {
-                    var declaration = symbol.declarations[0];
-                    if (declaration.name) {
-                        return ts.declarationNameToString(declaration.name);
-                    }
-                    switch (declaration.kind) {
-                        case 192:
-                            return "(Anonymous class)";
-                        case 179:
-                        case 180:
-                            return "(Anonymous function)";
-                    }
-                }
-                return symbol.name;
-            }
-            function appendSymbolNameOnly(symbol, writer) {
-                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
-            }
-            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
-                var symbolName = getNameOfSymbol(symbol);
-                var firstChar = symbolName.charCodeAt(0);
-                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
-                if (needsElementAccess) {
-                    writePunctuation(writer, 19);
-                    if (ts.isSingleOrDoubleQuote(firstChar)) {
-                        writer.writeStringLiteral(symbolName);
-                    }
-                    else {
-                        writer.writeSymbol(symbolName, symbol);
-                    }
-                    writePunctuation(writer, 20);
-                }
-                else {
-                    writePunctuation(writer, 21);
-                    writer.writeSymbol(symbolName, symbol);
-                }
-            }
-            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
-                var parentSymbol;
-                function appendParentTypeArgumentsAndSymbolName(symbol) {
-                    if (parentSymbol) {
-                        if (flags & 1) {
-                            if (symbol.flags & 16777216) {
-                                buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration);
-                            }
-                            else {
-                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
-                            }
-                        }
-                        appendPropertyOrElementAccessForSymbol(symbol, writer);
-                    }
-                    else {
-                        appendSymbolNameOnly(symbol, writer);
-                    }
-                    parentSymbol = symbol;
-                }
-                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
-                function walkSymbol(symbol, meaning) {
-                    if (symbol) {
-                        var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2));
-                        if (!accessibleSymbolChain ||
-                            needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
-                            walkSymbol(getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol), getQualifiedLeftMeaning(meaning));
-                        }
-                        if (accessibleSymbolChain) {
-                            for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
-                                var accessibleSymbol = accessibleSymbolChain_1[_i];
-                                appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
-                            }
-                        }
-                        else {
-                            if (!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) {
-                                return;
-                            }
-                            if (symbol.flags & 2048 || symbol.flags & 4096) {
-                                return;
-                            }
-                            appendParentTypeArgumentsAndSymbolName(symbol);
-                        }
-                    }
-                }
-                var isTypeParameter = symbol.flags & 262144;
-                var typeFormatFlag = 128 & typeFlags;
-                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
-                    walkSymbol(symbol, meaning);
-                    return;
-                }
-                return appendParentTypeArgumentsAndSymbolName(symbol);
-            }
-            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
-                var globalFlagsToPass = globalFlags & 16;
-                var inObjectTypeLiteral = false;
-                return writeType(type, globalFlags);
-                function writeType(type, flags) {
-                    if (type.flags & 150995071) {
-                        writer.writeKeyword(!(globalFlags & 16) && isTypeAny(type)
-                            ? "any"
-                            : type.intrinsicName);
-                    }
-                    else if (type.flags & 33554432) {
-                        if (inObjectTypeLiteral) {
-                            writer.reportInaccessibleThisError();
-                        }
-                        writer.writeKeyword("this");
-                    }
-                    else if (type.flags & 4096) {
-                        writeTypeReference(type, flags);
-                    }
-                    else if (type.flags & (1024 | 2048 | 128 | 512)) {
-                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793056, 0, flags);
-                    }
-                    else if (type.flags & 8192) {
-                        writeTupleType(type);
-                    }
-                    else if (type.flags & 49152) {
-                        writeUnionOrIntersectionType(type, flags);
-                    }
-                    else if (type.flags & 65536) {
-                        writeAnonymousType(type, flags);
-                    }
-                    else if (type.flags & 256) {
-                        writer.writeStringLiteral("\"" + ts.escapeString(type.text) + "\"");
-                    }
-                    else {
-                        writePunctuation(writer, 15);
-                        writeSpace(writer);
-                        writePunctuation(writer, 22);
-                        writeSpace(writer);
-                        writePunctuation(writer, 16);
-                    }
-                }
-                function writeTypeList(types, delimiter) {
-                    for (var i = 0; i < types.length; i++) {
-                        if (i > 0) {
-                            if (delimiter !== 24) {
-                                writeSpace(writer);
-                            }
-                            writePunctuation(writer, delimiter);
-                            writeSpace(writer);
-                        }
-                        writeType(types[i], delimiter === 24 ? 0 : 64);
-                    }
-                }
-                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
-                    if (symbol.flags & 32 || !isReservedMemberName(symbol.name)) {
-                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793056, 0, flags);
-                    }
-                    if (pos < end) {
-                        writePunctuation(writer, 25);
-                        writeType(typeArguments[pos], 256);
-                        pos++;
-                        while (pos < end) {
-                            writePunctuation(writer, 24);
-                            writeSpace(writer);
-                            writeType(typeArguments[pos], 0);
-                            pos++;
-                        }
-                        writePunctuation(writer, 27);
-                    }
-                }
-                function writeTypeReference(type, flags) {
-                    var typeArguments = type.typeArguments || emptyArray;
-                    if (type.target === globalArrayType && !(flags & 1)) {
-                        writeType(typeArguments[0], 64);
-                        writePunctuation(writer, 19);
-                        writePunctuation(writer, 20);
-                    }
-                    else {
-                        var outerTypeParameters = type.target.outerTypeParameters;
-                        var i = 0;
-                        if (outerTypeParameters) {
-                            var length_1 = outerTypeParameters.length;
-                            while (i < length_1) {
-                                var start = i;
-                                var parent_6 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
-                                do {
-                                    i++;
-                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_6);
-                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
-                                    writeSymbolTypeReference(parent_6, typeArguments, start, i, flags);
-                                    writePunctuation(writer, 21);
-                                }
-                            }
-                        }
-                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
-                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
-                    }
-                }
-                function writeTupleType(type) {
-                    writePunctuation(writer, 19);
-                    writeTypeList(type.elementTypes, 24);
-                    writePunctuation(writer, 20);
-                }
-                function writeUnionOrIntersectionType(type, flags) {
-                    if (flags & 64) {
-                        writePunctuation(writer, 17);
-                    }
-                    writeTypeList(type.types, type.flags & 16384 ? 47 : 46);
-                    if (flags & 64) {
-                        writePunctuation(writer, 18);
-                    }
-                }
-                function writeAnonymousType(type, flags) {
-                    var symbol = type.symbol;
-                    if (symbol) {
-                        if (symbol.flags & (32 | 384 | 512)) {
-                            writeTypeOfSymbol(type, flags);
-                        }
-                        else if (shouldWriteTypeOfFunctionSymbol()) {
-                            writeTypeOfSymbol(type, flags);
-                        }
-                        else if (ts.contains(symbolStack, symbol)) {
-                            var typeAlias = getTypeAliasForTypeLiteral(type);
-                            if (typeAlias) {
-                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793056, 0, flags);
-                            }
-                            else {
-                                writeKeyword(writer, 117);
-                            }
-                        }
-                        else {
-                            if (!symbolStack) {
-                                symbolStack = [];
-                            }
-                            symbolStack.push(symbol);
-                            writeLiteralType(type, flags);
-                            symbolStack.pop();
-                        }
-                    }
-                    else {
-                        writeLiteralType(type, flags);
-                    }
-                    function shouldWriteTypeOfFunctionSymbol() {
-                        var isStaticMethodSymbol = !!(symbol.flags & 8192 &&
-                            ts.forEach(symbol.declarations, function (declaration) { return declaration.flags & 32; }));
-                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16) &&
-                            (symbol.parent ||
-                                ts.forEach(symbol.declarations, function (declaration) {
-                                    return declaration.parent.kind === 256 || declaration.parent.kind === 226;
-                                }));
-                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
-                            return !!(flags & 2) ||
-                                (ts.contains(symbolStack, symbol));
-                        }
-                    }
-                }
-                function writeTypeOfSymbol(type, typeFormatFlags) {
-                    writeKeyword(writer, 101);
-                    writeSpace(writer);
-                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455, 0, typeFormatFlags);
-                }
-                function writeIndexSignature(info, keyword) {
-                    if (info) {
-                        if (info.isReadonly) {
-                            writeKeyword(writer, 128);
-                            writeSpace(writer);
-                        }
-                        writePunctuation(writer, 19);
-                        writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
-                        writePunctuation(writer, 54);
-                        writeSpace(writer);
-                        writeKeyword(writer, keyword);
-                        writePunctuation(writer, 20);
-                        writePunctuation(writer, 54);
-                        writeSpace(writer);
-                        writeType(info.type, 0);
-                        writePunctuation(writer, 23);
-                        writer.writeLine();
-                    }
-                }
-                function writePropertyWithModifiers(prop) {
-                    if (isReadonlySymbol(prop)) {
-                        writeKeyword(writer, 128);
-                        writeSpace(writer);
-                    }
-                    buildSymbolDisplay(prop, writer);
-                    if (prop.flags & 536870912) {
-                        writePunctuation(writer, 53);
-                    }
-                }
-                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
-                    if (flags & 64) {
-                        return true;
-                    }
-                    else if (flags & 256) {
-                        var typeParameters = callSignature.target && (flags & 32) ?
-                            callSignature.target.typeParameters : callSignature.typeParameters;
-                        return typeParameters && typeParameters.length !== 0;
-                    }
-                    return false;
-                }
-                function writeLiteralType(type, flags) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
-                            writePunctuation(writer, 15);
-                            writePunctuation(writer, 16);
-                            return;
-                        }
-                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
-                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 17);
-                            }
-                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8, undefined, symbolStack);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 18);
-                            }
-                            return;
-                        }
-                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
-                            if (flags & 64) {
-                                writePunctuation(writer, 17);
-                            }
-                            writeKeyword(writer, 92);
-                            writeSpace(writer);
-                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8, undefined, symbolStack);
-                            if (flags & 64) {
-                                writePunctuation(writer, 18);
-                            }
-                            return;
-                        }
-                    }
-                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
-                    inObjectTypeLiteral = true;
-                    writePunctuation(writer, 15);
-                    writer.writeLine();
-                    writer.increaseIndent();
-                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
-                        var signature = _a[_i];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, undefined, symbolStack);
-                        writePunctuation(writer, 23);
-                        writer.writeLine();
-                    }
-                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
-                        var signature = _c[_b];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1, symbolStack);
-                        writePunctuation(writer, 23);
-                        writer.writeLine();
-                    }
-                    writeIndexSignature(resolved.stringIndexInfo, 132);
-                    writeIndexSignature(resolved.numberIndexInfo, 130);
-                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
-                        var p = _e[_d];
-                        var t = getTypeOfSymbol(p);
-                        if (p.flags & (16 | 8192) && !getPropertiesOfObjectType(t).length) {
-                            var signatures = getSignaturesOfType(t, 0);
-                            for (var _f = 0, signatures_1 = signatures; _f < signatures_1.length; _f++) {
-                                var signature = signatures_1[_f];
-                                writePropertyWithModifiers(p);
-                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, undefined, symbolStack);
-                                writePunctuation(writer, 23);
-                                writer.writeLine();
-                            }
-                        }
-                        else {
-                            writePropertyWithModifiers(p);
-                            writePunctuation(writer, 54);
-                            writeSpace(writer);
-                            writeType(t, 0);
-                            writePunctuation(writer, 23);
-                            writer.writeLine();
-                        }
-                    }
-                    writer.decreaseIndent();
-                    writePunctuation(writer, 16);
-                    inObjectTypeLiteral = saveInObjectTypeLiteral;
-                }
-            }
-            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
-                var targetSymbol = getTargetSymbol(symbol);
-                if (targetSymbol.flags & 32 || targetSymbol.flags & 64 || targetSymbol.flags & 524288) {
-                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
-                }
-            }
-            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
-                appendSymbolNameOnly(tp.symbol, writer);
-                var constraint = getConstraintOfTypeParameter(tp);
-                if (constraint) {
-                    writeSpace(writer);
-                    writeKeyword(writer, 83);
-                    writeSpace(writer);
-                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
-                }
-            }
-            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
-                var parameterNode = p.valueDeclaration;
-                if (ts.isRestParameter(parameterNode)) {
-                    writePunctuation(writer, 22);
-                }
-                if (ts.isBindingPattern(parameterNode.name)) {
-                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    appendSymbolNameOnly(p, writer);
-                }
-                if (isOptionalParameter(parameterNode)) {
-                    writePunctuation(writer, 53);
-                }
-                writePunctuation(writer, 54);
-                writeSpace(writer);
-                buildTypeDisplay(getTypeOfSymbol(p), writer, enclosingDeclaration, flags, symbolStack);
-            }
-            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
-                if (bindingPattern.kind === 167) {
-                    writePunctuation(writer, 15);
-                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 16);
-                }
-                else if (bindingPattern.kind === 168) {
-                    writePunctuation(writer, 19);
-                    var elements = bindingPattern.elements;
-                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    if (elements && elements.hasTrailingComma) {
-                        writePunctuation(writer, 24);
-                    }
-                    writePunctuation(writer, 20);
-                }
-            }
-            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
-                if (bindingElement.kind === 193) {
-                    return;
-                }
-                ts.Debug.assert(bindingElement.kind === 169);
-                if (bindingElement.propertyName) {
-                    writer.writeSymbol(ts.getTextOfNode(bindingElement.propertyName), bindingElement.symbol);
-                    writePunctuation(writer, 54);
-                    writeSpace(writer);
-                }
-                if (ts.isBindingPattern(bindingElement.name)) {
-                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    if (bindingElement.dotDotDotToken) {
-                        writePunctuation(writer, 22);
-                    }
-                    appendSymbolNameOnly(bindingElement.symbol, writer);
-                }
-            }
-            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25);
-                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 27);
-                }
-            }
-            function buildDisplayForCommaSeparatedList(list, writer, action) {
-                for (var i = 0; i < list.length; i++) {
-                    if (i > 0) {
-                        writePunctuation(writer, 24);
-                        writeSpace(writer);
-                    }
-                    action(list[i]);
-                }
-            }
-            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25);
-                    var flags_1 = 256;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (i > 0) {
-                            writePunctuation(writer, 24);
-                            writeSpace(writer);
-                            flags_1 = 0;
-                        }
-                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags_1);
-                    }
-                    writePunctuation(writer, 27);
-                }
-            }
-            function buildDisplayForParametersAndDelimiters(thisType, parameters, writer, enclosingDeclaration, flags, symbolStack) {
-                writePunctuation(writer, 17);
-                if (thisType) {
-                    writeKeyword(writer, 97);
-                    writePunctuation(writer, 54);
-                    writeSpace(writer);
-                    buildTypeDisplay(thisType, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                for (var i = 0; i < parameters.length; i++) {
-                    if (i > 0 || thisType) {
-                        writePunctuation(writer, 24);
-                        writeSpace(writer);
-                    }
-                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
-                }
-                writePunctuation(writer, 18);
-            }
-            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    writer.writeParameter(predicate.parameterName);
-                }
-                else {
-                    writeKeyword(writer, 97);
-                }
-                writeSpace(writer);
-                writeKeyword(writer, 124);
-                writeSpace(writer);
-                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
-            }
-            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
-                if (flags & 8) {
-                    writeSpace(writer);
-                    writePunctuation(writer, 34);
-                }
-                else {
-                    writePunctuation(writer, 54);
-                }
-                writeSpace(writer);
-                if (signature.typePredicate) {
-                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    var returnType = getReturnTypeOfSignature(signature);
-                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
-                }
-            }
-            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
-                if (kind === 1) {
-                    writeKeyword(writer, 92);
-                    writeSpace(writer);
-                }
-                if (signature.target && (flags & 32)) {
-                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
-                }
-                else {
-                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                buildDisplayForParametersAndDelimiters(signature.thisType, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
-                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
-            }
-            return _displayBuilder || (_displayBuilder = {
-                buildSymbolDisplay: buildSymbolDisplay,
-                buildTypeDisplay: buildTypeDisplay,
-                buildTypeParameterDisplay: buildTypeParameterDisplay,
-                buildTypePredicateDisplay: buildTypePredicateDisplay,
-                buildParameterDisplay: buildParameterDisplay,
-                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
-                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
-                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
-                buildSignatureDisplay: buildSignatureDisplay,
-                buildReturnTypeDisplay: buildReturnTypeDisplay
-            });
-        }
-        function isDeclarationVisible(node) {
-            if (node) {
-                var links = getNodeLinks(node);
-                if (links.isVisible === undefined) {
-                    links.isVisible = !!determineIfDeclarationIsVisible();
-                }
-                return links.isVisible;
-            }
-            return false;
-            function determineIfDeclarationIsVisible() {
-                switch (node.kind) {
-                    case 169:
-                        return isDeclarationVisible(node.parent.parent);
-                    case 218:
-                        if (ts.isBindingPattern(node.name) &&
-                            !node.name.elements.length) {
-                            return false;
-                        }
-                    case 225:
-                    case 221:
-                    case 222:
-                    case 223:
-                    case 220:
-                    case 224:
-                    case 229:
-                        if (ts.isExternalModuleAugmentation(node)) {
-                            return true;
-                        }
-                        var parent_7 = getDeclarationContainer(node);
-                        if (!(ts.getCombinedNodeFlags(node) & 1) &&
-                            !(node.kind !== 229 && parent_7.kind !== 256 && ts.isInAmbientContext(parent_7))) {
-                            return isGlobalSourceFile(parent_7);
-                        }
-                        return isDeclarationVisible(parent_7);
-                    case 145:
-                    case 144:
-                    case 149:
-                    case 150:
-                    case 147:
-                    case 146:
-                        if (node.flags & (8 | 16)) {
-                            return false;
-                        }
-                    case 148:
-                    case 152:
-                    case 151:
-                    case 153:
-                    case 142:
-                    case 226:
-                    case 156:
-                    case 157:
-                    case 159:
-                    case 155:
-                    case 160:
-                    case 161:
-                    case 162:
-                    case 163:
-                    case 164:
-                        return isDeclarationVisible(node.parent);
-                    case 231:
-                    case 232:
-                    case 234:
-                        return false;
-                    case 141:
-                    case 256:
-                        return true;
-                    case 235:
-                        return false;
-                    default:
-                        return false;
-                }
-            }
-        }
-        function collectLinkedAliases(node) {
-            var exportSymbol;
-            if (node.parent && node.parent.kind === 235) {
-                exportSymbol = resolveName(node.parent, node.text, 107455 | 793056 | 1536 | 8388608, ts.Diagnostics.Cannot_find_name_0, node);
-            }
-            else if (node.parent.kind === 238) {
-                var exportSpecifier = node.parent;
-                exportSymbol = exportSpecifier.parent.parent.moduleSpecifier ?
-                    getExternalModuleMember(exportSpecifier.parent.parent, exportSpecifier) :
-                    resolveEntityName(exportSpecifier.propertyName || exportSpecifier.name, 107455 | 793056 | 1536 | 8388608);
-            }
-            var result = [];
-            if (exportSymbol) {
-                buildVisibleNodeList(exportSymbol.declarations);
-            }
-            return result;
-            function buildVisibleNodeList(declarations) {
-                ts.forEach(declarations, function (declaration) {
-                    getNodeLinks(declaration).isVisible = true;
-                    var resultNode = getAnyImportSyntax(declaration) || declaration;
-                    if (!ts.contains(result, resultNode)) {
-                        result.push(resultNode);
-                    }
-                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
-                        var internalModuleReference = declaration.moduleReference;
-                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
-                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 | 793056 | 1536, undefined, undefined);
-                        if (importSymbol) {
-                            buildVisibleNodeList(importSymbol.declarations);
-                        }
-                    }
-                });
-            }
-        }
-        function pushTypeResolution(target, propertyName) {
-            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
-            if (resolutionCycleStartIndex >= 0) {
-                var length_2 = resolutionTargets.length;
-                for (var i = resolutionCycleStartIndex; i < length_2; i++) {
-                    resolutionResults[i] = false;
-                }
-                return false;
-            }
-            resolutionTargets.push(target);
-            resolutionResults.push(true);
-            resolutionPropertyNames.push(propertyName);
-            return true;
-        }
-        function findResolutionCycleStartIndex(target, propertyName) {
-            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
-                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
-                    return -1;
-                }
-                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
-                    return i;
-                }
-            }
-            return -1;
-        }
-        function hasType(target, propertyName) {
-            if (propertyName === 0) {
-                return getSymbolLinks(target).type;
-            }
-            if (propertyName === 2) {
-                return getSymbolLinks(target).declaredType;
-            }
-            if (propertyName === 1) {
-                ts.Debug.assert(!!(target.flags & 1024));
-                return target.resolvedBaseConstructorType;
-            }
-            if (propertyName === 3) {
-                return target.resolvedReturnType;
-            }
-            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
-        }
-        function popTypeResolution() {
-            resolutionTargets.pop();
-            resolutionPropertyNames.pop();
-            return resolutionResults.pop();
-        }
-        function getDeclarationContainer(node) {
-            node = ts.getRootDeclaration(node);
-            while (node) {
-                switch (node.kind) {
-                    case 218:
-                    case 219:
-                    case 234:
-                    case 233:
-                    case 232:
-                    case 231:
-                        node = node.parent;
-                        break;
-                    default:
-                        return node.parent;
-                }
-            }
-        }
-        function getTypeOfPrototypeProperty(prototype) {
-            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
-            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
-        }
-        function getTypeOfPropertyOfType(type, name) {
-            var prop = getPropertyOfType(type, name);
-            return prop ? getTypeOfSymbol(prop) : undefined;
-        }
-        function isTypeAny(type) {
-            return type && (type.flags & 1) !== 0;
-        }
-        function getTypeForBindingElementParent(node) {
-            var symbol = getSymbolOfNode(node);
-            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, false);
-        }
-        function getTextOfPropertyName(name) {
-            switch (name.kind) {
-                case 69:
-                    return name.text;
-                case 9:
-                case 8:
-                    return name.text;
-                case 140:
-                    if (ts.isStringOrNumericLiteral(name.expression.kind)) {
-                        return name.expression.text;
-                    }
-            }
-            return undefined;
-        }
-        function isComputedNonLiteralName(name) {
-            return name.kind === 140 && !ts.isStringOrNumericLiteral(name.expression.kind);
-        }
-        function getTypeForBindingElement(declaration) {
-            var pattern = declaration.parent;
-            var parentType = getTypeForBindingElementParent(pattern.parent);
-            if (parentType === unknownType) {
-                return unknownType;
-            }
-            if (!parentType || isTypeAny(parentType)) {
-                if (declaration.initializer) {
-                    return checkExpressionCached(declaration.initializer);
-                }
-                return parentType;
-            }
-            var type;
-            if (pattern.kind === 167) {
-                var name_10 = declaration.propertyName || declaration.name;
-                if (isComputedNonLiteralName(name_10)) {
-                    return anyType;
-                }
-                if (declaration.initializer) {
-                    getContextualType(declaration.initializer);
-                }
-                var text = getTextOfPropertyName(name_10);
-                type = getTypeOfPropertyOfType(parentType, text) ||
-                    isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1) ||
-                    getIndexTypeOfType(parentType, 0);
-                if (!type) {
-                    error(name_10, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_10));
-                    return unknownType;
-                }
-            }
-            else {
-                var elementType = checkIteratedTypeOrElementType(parentType, pattern, false);
-                if (!declaration.dotDotDotToken) {
-                    var propName = "" + ts.indexOf(pattern.elements, declaration);
-                    type = isTupleLikeType(parentType)
-                        ? getTypeOfPropertyOfType(parentType, propName)
-                        : elementType;
-                    if (!type) {
-                        if (isTupleType(parentType)) {
-                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), parentType.elementTypes.length, pattern.elements.length);
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
-                        }
-                        return unknownType;
-                    }
-                }
-                else {
-                    type = createArrayType(elementType);
-                }
-            }
-            if (strictNullChecks && declaration.initializer && !(getNullableKind(checkExpressionCached(declaration.initializer)) & 32)) {
-                type = getTypeWithFacts(type, 131072);
-            }
-            return type;
-        }
-        function getTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            var jsDocType = getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-            if (jsDocType) {
-                return getTypeFromTypeNode(jsDocType);
-            }
-        }
-        function getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            var typeTag = ts.getJSDocTypeTag(declaration);
-            if (typeTag && typeTag.typeExpression) {
-                return typeTag.typeExpression.type;
-            }
-            if (declaration.kind === 218 &&
-                declaration.parent.kind === 219 &&
-                declaration.parent.parent.kind === 200) {
-                var annotation = ts.getJSDocTypeTag(declaration.parent.parent);
-                if (annotation && annotation.typeExpression) {
-                    return annotation.typeExpression.type;
-                }
-            }
-            else if (declaration.kind === 142) {
-                var paramTag = ts.getCorrespondingJSDocParameterTag(declaration);
-                if (paramTag && paramTag.typeExpression) {
-                    return paramTag.typeExpression.type;
-                }
-            }
-            return undefined;
-        }
-        function addOptionality(type, optional) {
-            return strictNullChecks && optional ? addNullableKind(type, 32) : type;
-        }
-        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
-            if (declaration.flags & 134217728) {
-                var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            if (declaration.parent.parent.kind === 207) {
-                return stringType;
-            }
-            if (declaration.parent.parent.kind === 208) {
-                return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType;
-            }
-            if (ts.isBindingPattern(declaration.parent)) {
-                return getTypeForBindingElement(declaration);
-            }
-            if (declaration.type) {
-                return addOptionality(getTypeFromTypeNode(declaration.type), declaration.questionToken && includeOptionality);
-            }
-            if (declaration.kind === 142) {
-                var func = declaration.parent;
-                if (func.kind === 150 && !ts.hasDynamicName(func)) {
-                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149);
-                    if (getter) {
-                        var signature = getSignatureFromDeclaration(getter);
-                        var thisParameter = getAccessorThisParameter(func);
-                        if (thisParameter && declaration === thisParameter) {
-                            return signature.thisType;
-                        }
-                        return getReturnTypeOfSignature(signature);
-                    }
-                }
-                var type = declaration.symbol.name === "this"
-                    ? getContextuallyTypedThisType(func)
-                    : getContextuallyTypedParameterType(declaration);
-                if (type) {
-                    return addOptionality(type, declaration.questionToken && includeOptionality);
-                }
-            }
-            if (declaration.initializer) {
-                return addOptionality(checkExpressionCached(declaration.initializer), declaration.questionToken && includeOptionality);
-            }
-            if (declaration.kind === 254) {
-                return checkIdentifier(declaration.name);
-            }
-            if (ts.isBindingPattern(declaration.name)) {
-                return getTypeFromBindingPattern(declaration.name, false);
-            }
-            return undefined;
-        }
-        function getTypeFromBindingElement(element, includePatternInType) {
-            if (element.initializer) {
-                var type = checkExpressionCached(element.initializer);
-                reportErrorsFromWidening(element, type);
-                return getWidenedType(type);
-            }
-            if (ts.isBindingPattern(element.name)) {
-                return getTypeFromBindingPattern(element.name, includePatternInType);
-            }
-            if (compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
-                reportImplicitAnyError(element, anyType);
-            }
-            return anyType;
-        }
-        function getTypeFromObjectBindingPattern(pattern, includePatternInType) {
-            var members = {};
-            var hasComputedProperties = false;
-            ts.forEach(pattern.elements, function (e) {
-                var name = e.propertyName || e.name;
-                if (isComputedNonLiteralName(name)) {
-                    hasComputedProperties = true;
-                    return;
-                }
-                var text = getTextOfPropertyName(name);
-                var flags = 4 | 67108864 | (e.initializer ? 536870912 : 0);
-                var symbol = createSymbol(flags, text);
-                symbol.type = getTypeFromBindingElement(e, includePatternInType);
-                symbol.bindingElement = e;
-                members[symbol.name] = symbol;
-            });
-            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined);
-            if (includePatternInType) {
-                result.pattern = pattern;
-            }
-            if (hasComputedProperties) {
-                result.flags |= 67108864;
-            }
-            return result;
-        }
-        function getTypeFromArrayBindingPattern(pattern, includePatternInType) {
-            var elements = pattern.elements;
-            if (elements.length === 0 || elements[elements.length - 1].dotDotDotToken) {
-                return languageVersion >= 2 ? createIterableType(anyType) : anyArrayType;
-            }
-            var elementTypes = ts.map(elements, function (e) { return e.kind === 193 ? anyType : getTypeFromBindingElement(e, includePatternInType); });
-            if (includePatternInType) {
-                var result = createNewTupleType(elementTypes);
-                result.pattern = pattern;
-                return result;
-            }
-            return createTupleType(elementTypes);
-        }
-        function getTypeFromBindingPattern(pattern, includePatternInType) {
-            return pattern.kind === 167
-                ? getTypeFromObjectBindingPattern(pattern, includePatternInType)
-                : getTypeFromArrayBindingPattern(pattern, includePatternInType);
-        }
-        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
-            var type = getTypeForVariableLikeDeclaration(declaration, true);
-            if (type) {
-                if (reportErrors) {
-                    reportErrorsFromWidening(declaration, type);
-                }
-                if (declaration.kind === 253) {
-                    return type;
-                }
-                return getWidenedType(type);
-            }
-            type = declaration.dotDotDotToken ? anyArrayType : anyType;
-            if (reportErrors && compilerOptions.noImplicitAny) {
-                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
-                    reportImplicitAnyError(declaration, type);
-                }
-            }
-            return type;
-        }
-        function declarationBelongsToPrivateAmbientMember(declaration) {
-            var root = ts.getRootDeclaration(declaration);
-            var memberDeclaration = root.kind === 142 ? root.parent : root;
-            return isPrivateWithinAmbient(memberDeclaration);
-        }
-        function getTypeOfVariableOrParameterOrProperty(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                if (symbol.flags & 134217728) {
-                    return links.type = getTypeOfPrototypeProperty(symbol);
-                }
-                var declaration = symbol.valueDeclaration;
-                if (declaration.parent.kind === 252) {
-                    return links.type = anyType;
-                }
-                if (declaration.kind === 235) {
-                    return links.type = checkExpression(declaration.expression);
-                }
-                if (declaration.kind === 187) {
-                    return links.type = getUnionType(ts.map(symbol.declarations, function (decl) { return checkExpressionCached(decl.right); }));
-                }
-                if (declaration.kind === 172) {
-                    if (declaration.parent.kind === 187) {
-                        return links.type = checkExpressionCached(declaration.parent.right);
-                    }
-                }
-                if (!pushTypeResolution(symbol, 0)) {
-                    return unknownType;
-                }
-                var type = getWidenedTypeForVariableLikeDeclaration(declaration, true);
-                if (!popTypeResolution()) {
-                    if (symbol.valueDeclaration.type) {
-                        type = unknownType;
-                        error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
-                    }
-                    else {
-                        type = anyType;
-                        if (compilerOptions.noImplicitAny) {
-                            error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
-                        }
-                    }
-                }
-                links.type = type;
-            }
-            return links.type;
-        }
-        function getAnnotatedAccessorType(accessor) {
-            if (accessor) {
-                if (accessor.kind === 149) {
-                    return accessor.type && getTypeFromTypeNode(accessor.type);
-                }
-                else {
-                    var setterTypeAnnotation = ts.getSetAccessorTypeAnnotationNode(accessor);
-                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
-                }
-            }
-            return undefined;
-        }
-        function getAnnotatedAccessorThisType(accessor) {
-            if (accessor) {
-                var parameter = getAccessorThisParameter(accessor);
-                if (parameter && parameter.type) {
-                    return getTypeFromTypeNode(accessor.parameters[0].type);
-                }
-            }
-            return undefined;
-        }
-        function getTypeOfAccessors(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var getter = ts.getDeclarationOfKind(symbol, 149);
-                var setter = ts.getDeclarationOfKind(symbol, 150);
-                if (getter && getter.flags & 134217728) {
-                    var jsDocType = getTypeForVariableLikeDeclarationFromJSDocComment(getter);
-                    if (jsDocType) {
-                        return links.type = jsDocType;
-                    }
-                }
-                if (!pushTypeResolution(symbol, 0)) {
-                    return unknownType;
-                }
-                var type = void 0;
-                var getterReturnType = getAnnotatedAccessorType(getter);
-                if (getterReturnType) {
-                    type = getterReturnType;
-                }
-                else {
-                    var setterParameterType = getAnnotatedAccessorType(setter);
-                    if (setterParameterType) {
-                        type = setterParameterType;
-                    }
-                    else {
-                        if (getter && getter.body) {
-                            type = getReturnTypeFromBody(getter);
-                        }
-                        else {
-                            if (compilerOptions.noImplicitAny) {
-                                error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation, symbolToString(symbol));
-                            }
-                            type = anyType;
-                        }
-                    }
-                }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var getter_1 = ts.getDeclarationOfKind(symbol, 149);
-                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
-                    }
-                }
-                links.type = type;
-            }
-            return links.type;
-        }
-        function getTypeOfFuncClassEnumModule(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var type = createObjectType(65536, symbol);
-                links.type = strictNullChecks && symbol.flags & 536870912 ?
-                    addNullableKind(type, 32) : type;
-            }
-            return links.type;
-        }
-        function getTypeOfEnumMember(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
-            }
-            return links.type;
-        }
-        function getTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var targetSymbol = resolveAlias(symbol);
-                links.type = targetSymbol.flags & 107455
-                    ? getTypeOfSymbol(targetSymbol)
-                    : unknownType;
-            }
-            return links.type;
-        }
-        function getTypeOfInstantiatedSymbol(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
-            }
-            return links.type;
-        }
-        function getTypeOfSymbol(symbol) {
-            if (symbol.flags & 16777216) {
-                return getTypeOfInstantiatedSymbol(symbol);
-            }
-            if (symbol.flags & (3 | 4)) {
-                return getTypeOfVariableOrParameterOrProperty(symbol);
-            }
-            if (symbol.flags & (16 | 8192 | 32 | 384 | 512)) {
-                return getTypeOfFuncClassEnumModule(symbol);
-            }
-            if (symbol.flags & 8) {
-                return getTypeOfEnumMember(symbol);
-            }
-            if (symbol.flags & 98304) {
-                return getTypeOfAccessors(symbol);
-            }
-            if (symbol.flags & 8388608) {
-                return getTypeOfAlias(symbol);
-            }
-            return unknownType;
-        }
-        function getTargetType(type) {
-            return type.flags & 4096 ? type.target : type;
-        }
-        function hasBaseType(type, checkBase) {
-            return check(type);
-            function check(type) {
-                var target = getTargetType(type);
-                return target === checkBase || ts.forEach(getBaseTypes(target), check);
-            }
-        }
-        function appendTypeParameters(typeParameters, declarations) {
-            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
-                var declaration = declarations_2[_i];
-                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
-                if (!typeParameters) {
-                    typeParameters = [tp];
-                }
-                else if (!ts.contains(typeParameters, tp)) {
-                    typeParameters.push(tp);
-                }
-            }
-            return typeParameters;
-        }
-        function appendOuterTypeParameters(typeParameters, node) {
-            while (true) {
-                node = node.parent;
-                if (!node) {
-                    return typeParameters;
-                }
-                if (node.kind === 221 || node.kind === 192 ||
-                    node.kind === 220 || node.kind === 179 ||
-                    node.kind === 147 || node.kind === 180) {
-                    var declarations = node.typeParameters;
-                    if (declarations) {
-                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
-                    }
-                }
-            }
-        }
-        function getOuterTypeParametersOfClassOrInterface(symbol) {
-            var declaration = symbol.flags & 32 ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222);
-            return appendOuterTypeParameters(undefined, declaration);
-        }
-        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
-            var result;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var node = _a[_i];
-                if (node.kind === 222 || node.kind === 221 ||
-                    node.kind === 192 || node.kind === 223) {
-                    var declaration = node;
-                    if (declaration.typeParameters) {
-                        result = appendTypeParameters(result, declaration.typeParameters);
-                    }
-                }
-            }
-            return result;
-        }
-        function getTypeParametersOfClassOrInterface(symbol) {
-            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
-        }
-        function isConstructorType(type) {
-            return type.flags & 80896 && getSignaturesOfType(type, 1).length > 0;
-        }
-        function getBaseTypeNodeOfClass(type) {
-            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
-        }
-        function getConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var typeArgCount = typeArgumentNodes ? typeArgumentNodes.length : 0;
-            return ts.filter(getSignaturesOfType(type, 1), function (sig) { return (sig.typeParameters ? sig.typeParameters.length : 0) === typeArgCount; });
-        }
-        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes);
-            if (typeArgumentNodes) {
-                var typeArguments_1 = ts.map(typeArgumentNodes, getTypeFromTypeNode);
-                signatures = ts.map(signatures, function (sig) { return getSignatureInstantiation(sig, typeArguments_1); });
-            }
-            return signatures;
-        }
-        function getBaseConstructorTypeOfClass(type) {
-            if (!type.resolvedBaseConstructorType) {
-                var baseTypeNode = getBaseTypeNodeOfClass(type);
-                if (!baseTypeNode) {
-                    return type.resolvedBaseConstructorType = undefinedType;
-                }
-                if (!pushTypeResolution(type, 1)) {
-                    return unknownType;
-                }
-                var baseConstructorType = checkExpression(baseTypeNode.expression);
-                if (baseConstructorType.flags & 80896) {
-                    resolveStructuredTypeMembers(baseConstructorType);
-                }
-                if (!popTypeResolution()) {
-                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
-                    return type.resolvedBaseConstructorType = unknownType;
-                }
-                if (baseConstructorType !== unknownType && baseConstructorType !== nullType && !isConstructorType(baseConstructorType)) {
-                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
-                    return type.resolvedBaseConstructorType = unknownType;
-                }
-                type.resolvedBaseConstructorType = baseConstructorType;
-            }
-            return type.resolvedBaseConstructorType;
-        }
-        function getBaseTypes(type) {
-            var isClass = type.symbol.flags & 32;
-            var isInterface = type.symbol.flags & 64;
-            if (!type.resolvedBaseTypes) {
-                if (!isClass && !isInterface) {
-                    ts.Debug.fail("type must be class or interface");
-                }
-                if (isClass) {
-                    resolveBaseTypesOfClass(type);
-                }
-                if (isInterface) {
-                    resolveBaseTypesOfInterface(type);
-                }
-            }
-            return type.resolvedBaseTypes;
-        }
-        function resolveBaseTypesOfClass(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            var baseConstructorType = getBaseConstructorTypeOfClass(type);
-            if (!(baseConstructorType.flags & 80896)) {
-                return;
-            }
-            var baseTypeNode = getBaseTypeNodeOfClass(type);
-            var baseType;
-            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
-            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 &&
-                areAllOuterTypeParametersApplied(originalBaseType)) {
-                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol);
-            }
-            else {
-                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments);
-                if (!constructors.length) {
-                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
-                    return;
-                }
-                baseType = getReturnTypeOfSignature(constructors[0]);
-            }
-            if (baseType === unknownType) {
-                return;
-            }
-            if (!(getTargetType(baseType).flags & (1024 | 2048))) {
-                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
-                return;
-            }
-            if (type === baseType || hasBaseType(baseType, type)) {
-                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 1));
-                return;
-            }
-            if (type.resolvedBaseTypes === emptyArray) {
-                type.resolvedBaseTypes = [baseType];
-            }
-            else {
-                type.resolvedBaseTypes.push(baseType);
-            }
-        }
-        function areAllOuterTypeParametersApplied(type) {
-            var outerTypeParameters = type.outerTypeParameters;
-            if (outerTypeParameters) {
-                var last = outerTypeParameters.length - 1;
-                var typeArguments = type.typeArguments;
-                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
-            }
-            return true;
-        }
-        function resolveBaseTypesOfInterface(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222 && ts.getInterfaceBaseTypeNodes(declaration)) {
-                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
-                        var node = _c[_b];
-                        var baseType = getTypeFromTypeNode(node);
-                        if (baseType !== unknownType) {
-                            if (getTargetType(baseType).flags & (1024 | 2048)) {
-                                if (type !== baseType && !hasBaseType(baseType, type)) {
-                                    if (type.resolvedBaseTypes === emptyArray) {
-                                        type.resolvedBaseTypes = [baseType];
-                                    }
-                                    else {
-                                        type.resolvedBaseTypes.push(baseType);
-                                    }
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 1));
-                                }
-                            }
-                            else {
-                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        function isIndependentInterface(symbol) {
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222) {
-                    if (declaration.flags & 16384) {
-                        return false;
-                    }
-                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
-                    if (baseTypeNodes) {
-                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
-                            var node = baseTypeNodes_1[_b];
-                            if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                                var baseSymbol = resolveEntityName(node.expression, 793056, true);
-                                if (!baseSymbol || !(baseSymbol.flags & 64) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
-                                    return false;
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            return true;
-        }
-        function getDeclaredTypeOfClassOrInterface(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var kind = symbol.flags & 32 ? 1024 : 2048;
-                var type = links.declaredType = createObjectType(kind, symbol);
-                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
-                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                if (outerTypeParameters || localTypeParameters || kind === 1024 || !isIndependentInterface(symbol)) {
-                    type.flags |= 4096;
-                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
-                    type.outerTypeParameters = outerTypeParameters;
-                    type.localTypeParameters = localTypeParameters;
-                    type.instantiations = {};
-                    type.instantiations[getTypeListId(type.typeParameters)] = type;
-                    type.target = type;
-                    type.typeArguments = type.typeParameters;
-                    type.thisType = createType(512 | 33554432);
-                    type.thisType.symbol = symbol;
-                    type.thisType.constraint = type;
-                }
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfTypeAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                if (!pushTypeResolution(symbol, 2)) {
-                    return unknownType;
-                }
-                var declaration = ts.getDeclarationOfKind(symbol, 223);
-                var type = getTypeFromTypeNode(declaration.type);
-                if (popTypeResolution()) {
-                    links.typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                    if (links.typeParameters) {
-                        links.instantiations = {};
-                        links.instantiations[getTypeListId(links.typeParameters)] = type;
-                    }
-                }
-                else {
-                    type = unknownType;
-                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
-                }
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfEnum(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var type = createType(128);
-                type.symbol = symbol;
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfTypeParameter(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var type = createType(512);
-                type.symbol = symbol;
-                if (!ts.getDeclarationOfKind(symbol, 141).constraint) {
-                    type.constraint = noConstraintType;
-                }
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfSymbol(symbol) {
-            ts.Debug.assert((symbol.flags & 16777216) === 0);
-            if (symbol.flags & (32 | 64)) {
-                return getDeclaredTypeOfClassOrInterface(symbol);
-            }
-            if (symbol.flags & 524288) {
-                return getDeclaredTypeOfTypeAlias(symbol);
-            }
-            if (symbol.flags & 384) {
-                return getDeclaredTypeOfEnum(symbol);
-            }
-            if (symbol.flags & 262144) {
-                return getDeclaredTypeOfTypeParameter(symbol);
-            }
-            if (symbol.flags & 8388608) {
-                return getDeclaredTypeOfAlias(symbol);
-            }
-            return unknownType;
-        }
-        function isIndependentTypeReference(node) {
-            if (node.typeArguments) {
-                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
-                    var typeNode = _a[_i];
-                    if (!isIndependentType(typeNode)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        function isIndependentType(node) {
-            switch (node.kind) {
-                case 117:
-                case 132:
-                case 130:
-                case 120:
-                case 133:
-                case 103:
-                case 135:
-                case 93:
-                case 127:
-                case 166:
-                    return true;
-                case 160:
-                    return isIndependentType(node.elementType);
-                case 155:
-                    return isIndependentTypeReference(node);
-            }
-            return false;
-        }
-        function isIndependentVariableLikeDeclaration(node) {
-            return node.type && isIndependentType(node.type) || !node.type && !node.initializer;
-        }
-        function isIndependentFunctionLikeDeclaration(node) {
-            if (node.kind !== 148 && (!node.type || !isIndependentType(node.type))) {
-                return false;
-            }
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                if (!isIndependentVariableLikeDeclaration(parameter)) {
-                    return false;
-                }
-            }
-            return true;
-        }
-        function isIndependentMember(symbol) {
-            if (symbol.declarations && symbol.declarations.length === 1) {
-                var declaration = symbol.declarations[0];
-                if (declaration) {
-                    switch (declaration.kind) {
-                        case 145:
-                        case 144:
-                            return isIndependentVariableLikeDeclaration(declaration);
-                        case 147:
-                        case 146:
-                        case 148:
-                            return isIndependentFunctionLikeDeclaration(declaration);
-                    }
-                }
-            }
-            return false;
-        }
-        function createSymbolTable(symbols) {
-            var result = {};
-            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
-                var symbol = symbols_1[_i];
-                result[symbol.name] = symbol;
-            }
-            return result;
-        }
-        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
-            var result = {};
-            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
-                var symbol = symbols_2[_i];
-                result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper);
-            }
-            return result;
-        }
-        function addInheritedMembers(symbols, baseSymbols) {
-            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
-                var s = baseSymbols_1[_i];
-                if (!ts.hasProperty(symbols, s.name)) {
-                    symbols[s.name] = s;
-                }
-            }
-        }
-        function resolveDeclaredMembers(type) {
-            if (!type.declaredProperties) {
-                var symbol = type.symbol;
-                type.declaredProperties = getNamedMembers(symbol.members);
-                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members["__call"]);
-                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members["__new"]);
-                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
-                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
-            }
-            return type;
-        }
-        function getTypeWithThisArgument(type, thisArgument) {
-            if (type.flags & 4096) {
-                return createTypeReference(type.target, ts.concatenate(type.typeArguments, [thisArgument || type.target.thisType]));
-            }
-            return type;
-        }
-        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
-            var mapper = identityMapper;
-            var members = source.symbol.members;
-            var callSignatures = source.declaredCallSignatures;
-            var constructSignatures = source.declaredConstructSignatures;
-            var stringIndexInfo = source.declaredStringIndexInfo;
-            var numberIndexInfo = source.declaredNumberIndexInfo;
-            if (!ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
-                mapper = createTypeMapper(typeParameters, typeArguments);
-                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, typeParameters.length === 1);
-                callSignatures = instantiateList(source.declaredCallSignatures, mapper, instantiateSignature);
-                constructSignatures = instantiateList(source.declaredConstructSignatures, mapper, instantiateSignature);
-                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
-                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
-            }
-            var baseTypes = getBaseTypes(source);
-            if (baseTypes.length) {
-                if (members === source.symbol.members) {
-                    members = createSymbolTable(source.declaredProperties);
-                }
-                var thisArgument = ts.lastOrUndefined(typeArguments);
-                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
-                    var baseType = baseTypes_1[_i];
-                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
-                    addInheritedMembers(members, getPropertiesOfObjectType(instantiatedBaseType));
-                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0));
-                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1));
-                    stringIndexInfo = stringIndexInfo || getIndexInfoOfType(instantiatedBaseType, 0);
-                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1);
-                }
-            }
-            setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function resolveClassOrInterfaceMembers(type) {
-            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
-        }
-        function resolveTypeReferenceMembers(type) {
-            var source = resolveDeclaredMembers(type.target);
-            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
-            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
-                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
-            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
-        }
-        function createSignature(declaration, typeParameters, thisType, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasStringLiterals) {
-            var sig = new Signature(checker);
-            sig.declaration = declaration;
-            sig.typeParameters = typeParameters;
-            sig.parameters = parameters;
-            sig.thisType = thisType;
-            sig.resolvedReturnType = resolvedReturnType;
-            sig.typePredicate = typePredicate;
-            sig.minArgumentCount = minArgumentCount;
-            sig.hasRestParameter = hasRestParameter;
-            sig.hasStringLiterals = hasStringLiterals;
-            return sig;
-        }
-        function cloneSignature(sig) {
-            return createSignature(sig.declaration, sig.typeParameters, sig.thisType, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasStringLiterals);
-        }
-        function getDefaultConstructSignatures(classType) {
-            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-            var baseSignatures = getSignaturesOfType(baseConstructorType, 1);
-            if (baseSignatures.length === 0) {
-                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, undefined, 0, false, false)];
-            }
-            var baseTypeNode = getBaseTypeNodeOfClass(classType);
-            var typeArguments = ts.map(baseTypeNode.typeArguments, getTypeFromTypeNode);
-            var typeArgCount = typeArguments ? typeArguments.length : 0;
-            var result = [];
-            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
-                var baseSig = baseSignatures_1[_i];
-                var typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
-                if (typeParamCount === typeArgCount) {
-                    var sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
-                    sig.typeParameters = classType.localTypeParameters;
-                    sig.resolvedReturnType = classType;
-                    result.push(sig);
-                }
-            }
-            return result;
-        }
-        function createTupleTypeMemberSymbols(memberTypes) {
-            var members = {};
-            for (var i = 0; i < memberTypes.length; i++) {
-                var symbol = createSymbol(4 | 67108864, "" + i);
-                symbol.type = memberTypes[i];
-                members[i] = symbol;
-            }
-            return members;
-        }
-        function resolveTupleTypeMembers(type) {
-            var arrayElementType = getUnionType(type.elementTypes, true);
-            var arrayType = resolveStructuredTypeMembers(createTypeFromGenericGlobalType(globalArrayType, [arrayElementType, type]));
-            var members = createTupleTypeMemberSymbols(type.elementTypes);
-            addInheritedMembers(members, arrayType.properties);
-            setObjectTypeMembers(type, members, arrayType.callSignatures, arrayType.constructSignatures, arrayType.stringIndexInfo, arrayType.numberIndexInfo);
-        }
-        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
-            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
-                var s = signatureList_1[_i];
-                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
-                    return s;
-                }
-            }
-        }
-        function findMatchingSignatures(signatureLists, signature, listIndex) {
-            if (signature.typeParameters) {
-                if (listIndex > 0) {
-                    return undefined;
-                }
-                for (var i = 1; i < signatureLists.length; i++) {
-                    if (!findMatchingSignature(signatureLists[i], signature, false, false, false)) {
-                        return undefined;
-                    }
-                }
-                return [signature];
-            }
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, true, true, true);
-                if (!match) {
-                    return undefined;
-                }
-                if (!ts.contains(result, match)) {
-                    (result || (result = [])).push(match);
-                }
-            }
-            return result;
-        }
-        function getUnionSignatures(types, kind) {
-            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
-                    var signature = _a[_i];
-                    if (!result || !findMatchingSignature(result, signature, false, true, true)) {
-                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
-                        if (unionSignatures) {
-                            var s = signature;
-                            if (unionSignatures.length > 1) {
-                                s = cloneSignature(signature);
-                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisType; })) {
-                                    s.thisType = getUnionType(ts.map(unionSignatures, function (sig) { return sig.thisType || anyType; }));
-                                }
-                                s.resolvedReturnType = undefined;
-                                s.unionSignatures = unionSignatures;
-                            }
-                            (result || (result = [])).push(s);
-                        }
-                    }
-                }
-            }
-            return result || emptyArray;
-        }
-        function getUnionIndexInfo(types, kind) {
-            var indexTypes = [];
-            var isAnyReadonly = false;
-            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
-                var type = types_1[_i];
-                var indexInfo = getIndexInfoOfType(type, kind);
-                if (!indexInfo) {
-                    return undefined;
-                }
-                indexTypes.push(indexInfo.type);
-                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
-            }
-            return createIndexInfo(getUnionType(indexTypes), isAnyReadonly);
-        }
-        function resolveUnionTypeMembers(type) {
-            var callSignatures = getUnionSignatures(type.types, 0);
-            var constructSignatures = getUnionSignatures(type.types, 1);
-            var stringIndexInfo = getUnionIndexInfo(type.types, 0);
-            var numberIndexInfo = getUnionIndexInfo(type.types, 1);
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function intersectTypes(type1, type2) {
-            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
-        }
-        function intersectIndexInfos(info1, info2) {
-            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
-        }
-        function resolveIntersectionTypeMembers(type) {
-            var callSignatures = emptyArray;
-            var constructSignatures = emptyArray;
-            var stringIndexInfo = undefined;
-            var numberIndexInfo = undefined;
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0));
-                constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(t, 1));
-                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0));
-                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1));
-            }
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function resolveAnonymousTypeMembers(type) {
-            var symbol = type.symbol;
-            if (type.target) {
-                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, false);
-                var callSignatures = instantiateList(getSignaturesOfType(type.target, 0), type.mapper, instantiateSignature);
-                var constructSignatures = instantiateList(getSignaturesOfType(type.target, 1), type.mapper, instantiateSignature);
-                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0), type.mapper);
-                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1), type.mapper);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-            }
-            else if (symbol.flags & 2048) {
-                var members = symbol.members;
-                var callSignatures = getSignaturesOfSymbol(members["__call"]);
-                var constructSignatures = getSignaturesOfSymbol(members["__new"]);
-                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
-                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-            }
-            else {
-                var members = emptySymbols;
-                var constructSignatures = emptyArray;
-                if (symbol.flags & 1952) {
-                    members = getExportsOfSymbol(symbol);
-                }
-                if (symbol.flags & 32) {
-                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
-                    constructSignatures = getSignaturesOfSymbol(symbol.members["__constructor"]);
-                    if (!constructSignatures.length) {
-                        constructSignatures = getDefaultConstructSignatures(classType);
-                    }
-                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-                    if (baseConstructorType.flags & 80896) {
-                        members = createSymbolTable(getNamedMembers(members));
-                        addInheritedMembers(members, getPropertiesOfObjectType(baseConstructorType));
-                    }
-                }
-                var numberIndexInfo = symbol.flags & 384 ? enumNumberIndexInfo : undefined;
-                setObjectTypeMembers(type, members, emptyArray, constructSignatures, undefined, numberIndexInfo);
-                if (symbol.flags & (16 | 8192)) {
-                    type.callSignatures = getSignaturesOfSymbol(symbol);
-                }
-            }
-        }
-        function resolveStructuredTypeMembers(type) {
-            if (!type.members) {
-                if (type.flags & 4096) {
-                    resolveTypeReferenceMembers(type);
-                }
-                else if (type.flags & (1024 | 2048)) {
-                    resolveClassOrInterfaceMembers(type);
-                }
-                else if (type.flags & 65536) {
-                    resolveAnonymousTypeMembers(type);
-                }
-                else if (type.flags & 8192) {
-                    resolveTupleTypeMembers(type);
-                }
-                else if (type.flags & 16384) {
-                    resolveUnionTypeMembers(type);
-                }
-                else if (type.flags & 32768) {
-                    resolveIntersectionTypeMembers(type);
-                }
-            }
-            return type;
-        }
-        function getPropertiesOfObjectType(type) {
-            if (type.flags & 80896) {
-                return resolveStructuredTypeMembers(type).properties;
-            }
-            return emptyArray;
-        }
-        function getPropertyOfObjectType(type, name) {
-            if (type.flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (ts.hasProperty(resolved.members, name)) {
-                    var symbol = resolved.members[name];
-                    if (symbolIsValue(symbol)) {
-                        return symbol;
-                    }
-                }
-            }
-        }
-        function getPropertiesOfUnionOrIntersectionType(type) {
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var current = _a[_i];
-                for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    getPropertyOfUnionOrIntersectionType(type, prop.name);
-                }
-                if (type.flags & 16384) {
-                    break;
-                }
-            }
-            return type.resolvedProperties ? symbolsToArray(type.resolvedProperties) : emptyArray;
-        }
-        function getPropertiesOfType(type) {
-            type = getApparentType(type);
-            return type.flags & 49152 ? getPropertiesOfUnionOrIntersectionType(type) : getPropertiesOfObjectType(type);
-        }
-        function getApparentTypeOfTypeParameter(type) {
-            if (!type.resolvedApparentType) {
-                var constraintType = getConstraintOfTypeParameter(type);
-                while (constraintType && constraintType.flags & 512) {
-                    constraintType = getConstraintOfTypeParameter(constraintType);
-                }
-                type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type);
-            }
-            return type.resolvedApparentType;
-        }
-        function getApparentType(type) {
-            if (type.flags & 512) {
-                type = getApparentTypeOfTypeParameter(type);
-            }
-            if (type.flags & 258) {
-                type = globalStringType;
-            }
-            else if (type.flags & 132) {
-                type = globalNumberType;
-            }
-            else if (type.flags & 8) {
-                type = globalBooleanType;
-            }
-            else if (type.flags & 16777216) {
-                type = getGlobalESSymbolType();
-            }
-            return type;
-        }
-        function createUnionOrIntersectionProperty(containingType, name) {
-            var types = containingType.types;
-            var props;
-            var commonFlags = (containingType.flags & 32768) ? 536870912 : 0;
-            for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
-                var current = types_2[_i];
-                var type = getApparentType(current);
-                if (type !== unknownType) {
-                    var prop = getPropertyOfType(type, name);
-                    if (prop && !(getDeclarationFlagsFromSymbol(prop) & (8 | 16))) {
-                        commonFlags &= prop.flags;
-                        if (!props) {
-                            props = [prop];
-                        }
-                        else if (!ts.contains(props, prop)) {
-                            props.push(prop);
-                        }
-                    }
-                    else if (containingType.flags & 16384) {
-                        return undefined;
-                    }
-                }
-            }
-            if (!props) {
-                return undefined;
-            }
-            if (props.length === 1) {
-                return props[0];
-            }
-            var propTypes = [];
-            var declarations = [];
-            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
-                var prop = props_1[_a];
-                if (prop.declarations) {
-                    ts.addRange(declarations, prop.declarations);
-                }
-                propTypes.push(getTypeOfSymbol(prop));
-            }
-            var result = createSymbol(4 |
-                67108864 |
-                268435456 |
-                commonFlags, name);
-            result.containingType = containingType;
-            result.declarations = declarations;
-            result.type = containingType.flags & 16384 ? getUnionType(propTypes) : getIntersectionType(propTypes);
-            return result;
-        }
-        function getPropertyOfUnionOrIntersectionType(type, name) {
-            var properties = type.resolvedProperties || (type.resolvedProperties = {});
-            if (ts.hasProperty(properties, name)) {
-                return properties[name];
-            }
-            var property = createUnionOrIntersectionProperty(type, name);
-            if (property) {
-                properties[name] = property;
-            }
-            return property;
-        }
-        function getPropertyOfType(type, name) {
-            type = getApparentType(type);
-            if (type.flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (ts.hasProperty(resolved.members, name)) {
-                    var symbol = resolved.members[name];
-                    if (symbolIsValue(symbol)) {
-                        return symbol;
-                    }
-                }
-                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
-                    var symbol = getPropertyOfObjectType(globalFunctionType, name);
-                    if (symbol) {
-                        return symbol;
-                    }
-                }
-                return getPropertyOfObjectType(globalObjectType, name);
-            }
-            if (type.flags & 49152) {
-                return getPropertyOfUnionOrIntersectionType(type, name);
-            }
-            return undefined;
-        }
-        function getSignaturesOfStructuredType(type, kind) {
-            if (type.flags & 130048) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 ? resolved.callSignatures : resolved.constructSignatures;
-            }
-            return emptyArray;
-        }
-        function getSignaturesOfType(type, kind) {
-            return getSignaturesOfStructuredType(getApparentType(type), kind);
-        }
-        function getIndexInfoOfStructuredType(type, kind) {
-            if (type.flags & 130048) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 ? resolved.stringIndexInfo : resolved.numberIndexInfo;
-            }
-        }
-        function getIndexTypeOfStructuredType(type, kind) {
-            var info = getIndexInfoOfStructuredType(type, kind);
-            return info && info.type;
-        }
-        function getIndexInfoOfType(type, kind) {
-            return getIndexInfoOfStructuredType(getApparentType(type), kind);
-        }
-        function getIndexTypeOfType(type, kind) {
-            return getIndexTypeOfStructuredType(getApparentType(type), kind);
-        }
-        function getImplicitIndexTypeOfType(type, kind) {
-            if (isObjectLiteralType(type)) {
-                var propTypes = [];
-                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 || isNumericLiteralName(prop.name)) {
-                        propTypes.push(getTypeOfSymbol(prop));
-                    }
-                }
-                if (propTypes.length) {
-                    return getUnionType(propTypes);
-                }
-            }
-            return undefined;
-        }
-        function getTypeParametersFromJSDocTemplate(declaration) {
-            if (declaration.flags & 134217728) {
-                var templateTag = ts.getJSDocTemplateTag(declaration);
-                if (templateTag) {
-                    return getTypeParametersFromDeclaration(templateTag.typeParameters);
-                }
-            }
-            return undefined;
-        }
-        function getTypeParametersFromDeclaration(typeParameterDeclarations) {
-            var result = [];
-            ts.forEach(typeParameterDeclarations, function (node) {
-                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
-                if (!ts.contains(result, tp)) {
-                    result.push(tp);
-                }
-            });
-            return result;
-        }
-        function symbolsToArray(symbols) {
-            var result = [];
-            for (var id in symbols) {
-                if (!isReservedMemberName(id)) {
-                    result.push(symbols[id]);
-                }
-            }
-            return result;
-        }
-        function isOptionalParameter(node) {
-            if (node.flags & 134217728) {
-                if (node.type && node.type.kind === 268) {
-                    return true;
-                }
-                var paramTag = ts.getCorrespondingJSDocParameterTag(node);
-                if (paramTag) {
-                    if (paramTag.isBracketed) {
-                        return true;
-                    }
-                    if (paramTag.typeExpression) {
-                        return paramTag.typeExpression.type.kind === 268;
-                    }
-                }
-            }
-            if (ts.hasQuestionToken(node)) {
-                return true;
-            }
-            if (node.initializer) {
-                var signatureDeclaration = node.parent;
-                var signature = getSignatureFromDeclaration(signatureDeclaration);
-                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
-                ts.Debug.assert(parameterIndex >= 0);
-                return parameterIndex >= signature.minArgumentCount;
-            }
-            return false;
-        }
-        function createTypePredicateFromTypePredicateNode(node) {
-            if (node.parameterName.kind === 69) {
-                var parameterName = node.parameterName;
-                return {
-                    kind: 1,
-                    parameterName: parameterName ? parameterName.text : undefined,
-                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
-                    type: getTypeFromTypeNode(node.type)
-                };
-            }
-            else {
-                return {
-                    kind: 0,
-                    type: getTypeFromTypeNode(node.type)
-                };
-            }
-        }
-        function getSignatureFromDeclaration(declaration) {
-            var links = getNodeLinks(declaration);
-            if (!links.resolvedSignature) {
-                var parameters = [];
-                var hasStringLiterals = false;
-                var minArgumentCount = -1;
-                var thisType = undefined;
-                var hasThisParameter = void 0;
-                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
-                for (var i = isJSConstructSignature ? 1 : 0, n = declaration.parameters.length; i < n; i++) {
-                    var param = declaration.parameters[i];
-                    var paramSymbol = param.symbol;
-                    if (paramSymbol && !!(paramSymbol.flags & 4) && !ts.isBindingPattern(param.name)) {
-                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455, undefined, undefined);
-                        paramSymbol = resolvedSymbol;
-                    }
-                    if (i === 0 && paramSymbol.name === "this") {
-                        hasThisParameter = true;
-                        thisType = param.type ? getTypeFromTypeNode(param.type) : unknownType;
-                    }
-                    else {
-                        parameters.push(paramSymbol);
-                    }
-                    if (param.type && param.type.kind === 166) {
-                        hasStringLiterals = true;
-                    }
-                    if (param.initializer || param.questionToken || param.dotDotDotToken) {
-                        if (minArgumentCount < 0) {
-                            minArgumentCount = i - (hasThisParameter ? 1 : 0);
-                        }
-                    }
-                    else {
-                        minArgumentCount = -1;
-                    }
-                }
-                if ((declaration.kind === 149 || declaration.kind === 150) &&
-                    !ts.hasDynamicName(declaration) &&
-                    (!hasThisParameter || thisType === unknownType)) {
-                    var otherKind = declaration.kind === 149 ? 150 : 149;
-                    var setter = ts.getDeclarationOfKind(declaration.symbol, otherKind);
-                    thisType = getAnnotatedAccessorThisType(setter);
-                }
-                if (minArgumentCount < 0) {
-                    minArgumentCount = declaration.parameters.length - (hasThisParameter ? 1 : 0);
-                }
-                if (isJSConstructSignature) {
-                    minArgumentCount--;
-                }
-                var classType = declaration.kind === 148 ?
-                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
-                    : undefined;
-                var typeParameters = classType ? classType.localTypeParameters :
-                    declaration.typeParameters ? getTypeParametersFromDeclaration(declaration.typeParameters) :
-                        getTypeParametersFromJSDocTemplate(declaration);
-                var returnType = getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType);
-                var typePredicate = declaration.type && declaration.type.kind === 154 ?
-                    createTypePredicateFromTypePredicateNode(declaration.type) :
-                    undefined;
-                links.resolvedSignature = createSignature(declaration, typeParameters, thisType, parameters, returnType, typePredicate, minArgumentCount, ts.hasRestParameter(declaration), hasStringLiterals);
-            }
-            return links.resolvedSignature;
-        }
-        function getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType) {
-            if (isJSConstructSignature) {
-                return getTypeFromTypeNode(declaration.parameters[0].type);
-            }
-            else if (classType) {
-                return classType;
-            }
-            else if (declaration.type) {
-                return getTypeFromTypeNode(declaration.type);
-            }
-            if (declaration.flags & 134217728) {
-                var type = getReturnTypeFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            if (declaration.kind === 149 && !ts.hasDynamicName(declaration)) {
-                var setter = ts.getDeclarationOfKind(declaration.symbol, 150);
-                return getAnnotatedAccessorType(setter);
-            }
-            if (ts.nodeIsMissing(declaration.body)) {
-                return anyType;
-            }
-        }
-        function getSignaturesOfSymbol(symbol) {
-            if (!symbol)
-                return emptyArray;
-            var result = [];
-            for (var i = 0, len = symbol.declarations.length; i < len; i++) {
-                var node = symbol.declarations[i];
-                switch (node.kind) {
-                    case 156:
-                    case 157:
-                    case 220:
-                    case 147:
-                    case 146:
-                    case 148:
-                    case 151:
-                    case 152:
-                    case 153:
-                    case 149:
-                    case 150:
-                    case 179:
-                    case 180:
-                    case 269:
-                        if (i > 0 && node.body) {
-                            var previous = symbol.declarations[i - 1];
-                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
-                                break;
-                            }
-                        }
-                        result.push(getSignatureFromDeclaration(node));
-                }
-            }
-            return result;
-        }
-        function resolveExternalModuleTypeByLiteral(name) {
-            var moduleSym = resolveExternalModuleName(name, name);
-            if (moduleSym) {
-                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
-                if (resolvedModuleSymbol) {
-                    return getTypeOfSymbol(resolvedModuleSymbol);
-                }
-            }
-            return anyType;
-        }
-        function getReturnTypeOfSignature(signature) {
-            if (!signature.resolvedReturnType) {
-                if (!pushTypeResolution(signature, 3)) {
-                    return unknownType;
-                }
-                var type = void 0;
-                if (signature.target) {
-                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
-                }
-                else if (signature.unionSignatures) {
-                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature));
-                }
-                else {
-                    type = getReturnTypeFromBody(signature.declaration);
-                }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var declaration = signature.declaration;
-                        if (declaration.name) {
-                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
-                        }
-                    }
-                }
-                signature.resolvedReturnType = type;
-            }
-            return signature.resolvedReturnType;
-        }
-        function getRestTypeOfSignature(signature) {
-            if (signature.hasRestParameter) {
-                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
-                if (type.flags & 4096 && type.target === globalArrayType) {
-                    return type.typeArguments[0];
-                }
-            }
-            return anyType;
-        }
-        function getSignatureInstantiation(signature, typeArguments) {
-            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), true);
-        }
-        function getErasedSignature(signature) {
-            if (!signature.typeParameters)
-                return signature;
-            if (!signature.erasedSignatureCache) {
-                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), true);
-            }
-            return signature.erasedSignatureCache;
-        }
-        function getOrCreateTypeFromSignature(signature) {
-            if (!signature.isolatedSignatureType) {
-                var isConstructor = signature.declaration.kind === 148 || signature.declaration.kind === 152;
-                var type = createObjectType(65536 | 262144);
-                type.members = emptySymbols;
-                type.properties = emptyArray;
-                type.callSignatures = !isConstructor ? [signature] : emptyArray;
-                type.constructSignatures = isConstructor ? [signature] : emptyArray;
-                signature.isolatedSignatureType = type;
-            }
-            return signature.isolatedSignatureType;
-        }
-        function getIndexSymbol(symbol) {
-            return symbol.members["__index"];
-        }
-        function getIndexDeclarationOfSymbol(symbol, kind) {
-            var syntaxKind = kind === 1 ? 130 : 132;
-            var indexSymbol = getIndexSymbol(symbol);
-            if (indexSymbol) {
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var node = decl;
-                    if (node.parameters.length === 1) {
-                        var parameter = node.parameters[0];
-                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
-                            return node;
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function createIndexInfo(type, isReadonly, declaration) {
-            return { type: type, isReadonly: isReadonly, declaration: declaration };
-        }
-        function getIndexInfoOfSymbol(symbol, kind) {
-            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
-            if (declaration) {
-                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (declaration.flags & 64) !== 0, declaration);
-            }
-            return undefined;
-        }
-        function getConstraintDeclaration(type) {
-            return ts.getDeclarationOfKind(type.symbol, 141).constraint;
-        }
-        function hasConstraintReferenceTo(type, target) {
-            var checked;
-            while (type && !(type.flags & 33554432) && type.flags & 512 && !ts.contains(checked, type)) {
-                if (type === target) {
-                    return true;
-                }
-                (checked || (checked = [])).push(type);
-                var constraintDeclaration = getConstraintDeclaration(type);
-                type = constraintDeclaration && getTypeFromTypeNode(constraintDeclaration);
-            }
-            return false;
-        }
-        function getConstraintOfTypeParameter(typeParameter) {
-            if (!typeParameter.constraint) {
-                if (typeParameter.target) {
-                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
-                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
-                }
-                else {
-                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
-                    var constraint = getTypeFromTypeNode(constraintDeclaration);
-                    if (hasConstraintReferenceTo(constraint, typeParameter)) {
-                        error(constraintDeclaration, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
-                        constraint = unknownType;
-                    }
-                    typeParameter.constraint = constraint;
-                }
-            }
-            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
-        }
-        function getParentSymbolOfTypeParameter(typeParameter) {
-            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 141).parent);
-        }
-        function getTypeListId(types) {
-            if (types) {
-                switch (types.length) {
-                    case 1:
-                        return "" + types[0].id;
-                    case 2:
-                        return types[0].id + "," + types[1].id;
-                    default:
-                        var result = "";
-                        for (var i = 0; i < types.length; i++) {
-                            if (i > 0) {
-                                result += ",";
-                            }
-                            result += types[i].id;
-                        }
-                        return result;
-                }
-            }
-            return "";
-        }
-        function getPropagatingFlagsOfTypes(types, excludeKinds) {
-            var result = 0;
-            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
-                var type = types_3[_i];
-                if (!(type.flags & excludeKinds)) {
-                    result |= type.flags;
-                }
-            }
-            return result & 14680064;
-        }
-        function createTypeReference(target, typeArguments) {
-            var id = getTypeListId(typeArguments);
-            var type = target.instantiations[id];
-            if (!type) {
-                var propagatedFlags = typeArguments ? getPropagatingFlagsOfTypes(typeArguments, 0) : 0;
-                var flags = 4096 | propagatedFlags;
-                type = target.instantiations[id] = createObjectType(flags, target.symbol);
-                type.target = target;
-                type.typeArguments = typeArguments;
-            }
-            return type;
-        }
-        function getTypeFromClassOrInterfaceReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
-            var typeParameters = type.localTypeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, typeToString(type, undefined, 1), typeParameters.length);
-                    return unknownType;
-                }
-                return createTypeReference(type, ts.concatenate(type.outerTypeParameters, ts.map(node.typeArguments, getTypeFromTypeNode)));
-            }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
-                return unknownType;
-            }
-            return type;
-        }
-        function getTypeFromTypeAliasReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var links = getSymbolLinks(symbol);
-            var typeParameters = links.typeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, symbolToString(symbol), typeParameters.length);
-                    return unknownType;
-                }
-                var typeArguments = ts.map(node.typeArguments, getTypeFromTypeNode);
-                var id = getTypeListId(typeArguments);
-                return links.instantiations[id] || (links.instantiations[id] = instantiateType(type, createTypeMapper(typeParameters, typeArguments)));
-            }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
-            }
-            return type;
-        }
-        function getTypeFromNonGenericTypeReference(node, symbol) {
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
-            }
-            return getDeclaredTypeOfSymbol(symbol);
-        }
-        function getTypeReferenceName(node) {
-            switch (node.kind) {
-                case 155:
-                    return node.typeName;
-                case 267:
-                    return node.name;
-                case 194:
-                    if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                        return node.expression;
-                    }
-            }
-            return undefined;
-        }
-        function resolveTypeReferenceName(node, typeReferenceName) {
-            if (!typeReferenceName) {
-                return unknownSymbol;
-            }
-            return resolveEntityName(typeReferenceName, 793056) || unknownSymbol;
-        }
-        function getTypeReferenceType(node, symbol) {
-            if (symbol === unknownSymbol) {
-                return unknownType;
-            }
-            if (symbol.flags & (32 | 64)) {
-                return getTypeFromClassOrInterfaceReference(node, symbol);
-            }
-            if (symbol.flags & 524288) {
-                return getTypeFromTypeAliasReference(node, symbol);
-            }
-            if (symbol.flags & 107455 && node.kind === 267) {
-                return getTypeOfSymbol(symbol);
-            }
-            return getTypeFromNonGenericTypeReference(node, symbol);
-        }
-        function getTypeFromTypeReference(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var symbol = void 0;
-                var type = void 0;
-                if (node.kind === 267) {
-                    var typeReferenceName = getTypeReferenceName(node);
-                    symbol = resolveTypeReferenceName(node, typeReferenceName);
-                    type = getTypeReferenceType(node, symbol);
-                    links.resolvedSymbol = symbol;
-                    links.resolvedType = type;
-                }
-                else {
-                    var typeNameOrExpression = node.kind === 155 ? node.typeName :
-                        ts.isSupportedExpressionWithTypeArguments(node) ? node.expression :
-                            undefined;
-                    symbol = typeNameOrExpression && resolveEntityName(typeNameOrExpression, 793056) || unknownSymbol;
-                    type = symbol === unknownSymbol ? unknownType :
-                        symbol.flags & (32 | 64) ? getTypeFromClassOrInterfaceReference(node, symbol) :
-                            symbol.flags & 524288 ? getTypeFromTypeAliasReference(node, symbol) :
-                                getTypeFromNonGenericTypeReference(node, symbol);
-                }
-                links.resolvedSymbol = symbol;
-                links.resolvedType = type;
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeQueryNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getWidenedType(checkExpression(node.exprName));
-            }
-            return links.resolvedType;
-        }
-        function getTypeOfGlobalSymbol(symbol, arity) {
-            function getTypeDeclaration(symbol) {
-                var declarations = symbol.declarations;
-                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
-                    var declaration = declarations_3[_i];
-                    switch (declaration.kind) {
-                        case 221:
-                        case 222:
-                        case 224:
-                            return declaration;
-                    }
-                }
-            }
-            if (!symbol) {
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            var type = getDeclaredTypeOfSymbol(symbol);
-            if (!(type.flags & 80896)) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            if ((type.typeParameters ? type.typeParameters.length : 0) !== arity) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            return type;
-        }
-        function getGlobalValueSymbol(name) {
-            return getGlobalSymbol(name, 107455, ts.Diagnostics.Cannot_find_global_value_0);
-        }
-        function getGlobalTypeSymbol(name) {
-            return getGlobalSymbol(name, 793056, ts.Diagnostics.Cannot_find_global_type_0);
-        }
-        function getGlobalSymbol(name, meaning, diagnostic) {
-            return resolveName(undefined, name, meaning, diagnostic, name);
-        }
-        function getGlobalType(name, arity) {
-            if (arity === void 0) { arity = 0; }
-            return getTypeOfGlobalSymbol(getGlobalTypeSymbol(name), arity);
-        }
-        function getExportedTypeFromNamespace(namespace, name) {
-            var namespaceSymbol = getGlobalSymbol(namespace, 1536, undefined);
-            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793056);
-            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
-        }
-        function createTypedPropertyDescriptorType(propertyType) {
-            var globalTypedPropertyDescriptorType = getGlobalTypedPropertyDescriptorType();
-            return globalTypedPropertyDescriptorType !== emptyGenericType
-                ? createTypeReference(globalTypedPropertyDescriptorType, [propertyType])
-                : emptyObjectType;
-        }
-        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
-            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
-        }
-        function createIterableType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableType(), [elementType]);
-        }
-        function createIterableIteratorType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(), [elementType]);
-        }
-        function createArrayType(elementType) {
-            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
-        }
-        function getTypeFromArrayTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
-            }
-            return links.resolvedType;
-        }
-        function createTupleType(elementTypes) {
-            var id = getTypeListId(elementTypes);
-            return tupleTypes[id] || (tupleTypes[id] = createNewTupleType(elementTypes));
-        }
-        function createNewTupleType(elementTypes) {
-            var propagatedFlags = getPropagatingFlagsOfTypes(elementTypes, 0);
-            var type = createObjectType(8192 | propagatedFlags);
-            type.elementTypes = elementTypes;
-            return type;
-        }
-        function getTypeFromTupleTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNode));
-            }
-            return links.resolvedType;
-        }
-        function addTypeToSet(typeSet, type, typeSetKind) {
-            if (type.flags & typeSetKind) {
-                addTypesToSet(typeSet, type.types, typeSetKind);
-            }
-            else if (type.flags & (1 | 32 | 64)) {
-                if (type.flags & 1)
-                    typeSet.containsAny = true;
-                if (type.flags & 32)
-                    typeSet.containsUndefined = true;
-                if (type.flags & 64)
-                    typeSet.containsNull = true;
-            }
-            else if (type !== neverType && !ts.contains(typeSet, type)) {
-                typeSet.push(type);
-            }
-        }
-        function addTypesToSet(typeSet, types, typeSetKind) {
-            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
-                var type = types_4[_i];
-                addTypeToSet(typeSet, type, typeSetKind);
-            }
-        }
-        function isSubtypeOfAny(candidate, types) {
-            for (var i = 0, len = types.length; i < len; i++) {
-                if (candidate !== types[i] && isTypeSubtypeOf(candidate, types[i])) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function removeSubtypes(types) {
-            var i = types.length;
-            while (i > 0) {
-                i--;
-                if (isSubtypeOfAny(types[i], types)) {
-                    types.splice(i, 1);
-                }
-            }
-        }
-        function getUnionType(types, noSubtypeReduction) {
-            if (types.length === 0) {
-                return neverType;
-            }
-            if (types.length === 1) {
-                return types[0];
-            }
-            var typeSet = [];
-            addTypesToSet(typeSet, types, 16384);
-            if (typeSet.containsAny) {
-                return anyType;
-            }
-            if (strictNullChecks) {
-                if (typeSet.containsNull)
-                    typeSet.push(nullType);
-                if (typeSet.containsUndefined)
-                    typeSet.push(undefinedType);
-            }
-            if (!noSubtypeReduction) {
-                removeSubtypes(typeSet);
-            }
-            if (typeSet.length === 0) {
-                return typeSet.containsNull ? nullType :
-                    typeSet.containsUndefined ? undefinedType :
-                        neverType;
-            }
-            else if (typeSet.length === 1) {
-                return typeSet[0];
-            }
-            var id = getTypeListId(typeSet);
-            var type = unionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, 96);
-                type = unionTypes[id] = createObjectType(16384 | propagatedFlags);
-                type.types = typeSet;
-            }
-            return type;
-        }
-        function getTypeFromUnionTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), true);
-            }
-            return links.resolvedType;
-        }
-        function getIntersectionType(types) {
-            if (types.length === 0) {
-                return emptyObjectType;
-            }
-            var typeSet = [];
-            addTypesToSet(typeSet, types, 32768);
-            if (typeSet.containsAny) {
-                return anyType;
-            }
-            if (strictNullChecks) {
-                if (typeSet.containsNull)
-                    typeSet.push(nullType);
-                if (typeSet.containsUndefined)
-                    typeSet.push(undefinedType);
-            }
-            if (typeSet.length === 1) {
-                return typeSet[0];
-            }
-            var id = getTypeListId(typeSet);
-            var type = intersectionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, 96);
-                type = intersectionTypes[id] = createObjectType(32768 | propagatedFlags);
-                type.types = typeSet;
-            }
-            return type;
-        }
-        function getTypeFromIntersectionTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNode));
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createObjectType(65536, node.symbol);
-            }
-            return links.resolvedType;
-        }
-        function getStringLiteralTypeForText(text) {
-            if (ts.hasProperty(stringLiteralTypes, text)) {
-                return stringLiteralTypes[text];
-            }
-            var type = stringLiteralTypes[text] = createType(256);
-            type.text = text;
-            return type;
-        }
-        function getTypeFromStringLiteralTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getStringLiteralTypeForText(ts.unescapeIdentifier(node.text));
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromJSDocVariadicType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var type = getTypeFromTypeNode(node.type);
-                links.resolvedType = type ? createArrayType(type) : unknownType;
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromJSDocTupleType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var types = ts.map(node.types, getTypeFromTypeNode);
-                links.resolvedType = createTupleType(types);
-            }
-            return links.resolvedType;
-        }
-        function getThisType(node) {
-            var container = ts.getThisContainer(node, false);
-            var parent = container && container.parent;
-            if (parent && (ts.isClassLike(parent) || parent.kind === 222)) {
-                if (!(container.flags & 32) &&
-                    (container.kind !== 148 || ts.isNodeDescendentOf(node, container.body))) {
-                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
-                }
-            }
-            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
-            return unknownType;
-        }
-        function getTypeFromThisTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getThisType(node);
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeNode(node) {
-            switch (node.kind) {
-                case 117:
-                case 258:
-                case 259:
-                    return anyType;
-                case 132:
-                    return stringType;
-                case 130:
-                    return numberType;
-                case 120:
-                    return booleanType;
-                case 133:
-                    return esSymbolType;
-                case 103:
-                    return voidType;
-                case 135:
-                    return undefinedType;
-                case 93:
-                    return nullType;
-                case 127:
-                    return neverType;
-                case 165:
-                case 97:
-                    return getTypeFromThisTypeNode(node);
-                case 166:
-                    return getTypeFromStringLiteralTypeNode(node);
-                case 155:
-                case 267:
-                    return getTypeFromTypeReference(node);
-                case 154:
-                    return booleanType;
-                case 194:
-                    return getTypeFromTypeReference(node);
-                case 158:
-                    return getTypeFromTypeQueryNode(node);
-                case 160:
-                case 260:
-                    return getTypeFromArrayTypeNode(node);
-                case 161:
-                    return getTypeFromTupleTypeNode(node);
-                case 162:
-                case 261:
-                    return getTypeFromUnionTypeNode(node);
-                case 163:
-                    return getTypeFromIntersectionTypeNode(node);
-                case 164:
-                case 263:
-                case 264:
-                case 271:
-                case 272:
-                case 268:
-                    return getTypeFromTypeNode(node.type);
-                case 156:
-                case 157:
-                case 159:
-                case 269:
-                case 265:
-                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
-                case 69:
-                case 139:
-                    var symbol = getSymbolAtLocation(node);
-                    return symbol && getDeclaredTypeOfSymbol(symbol);
-                case 262:
-                    return getTypeFromJSDocTupleType(node);
-                case 270:
-                    return getTypeFromJSDocVariadicType(node);
-                default:
-                    return unknownType;
-            }
-        }
-        function instantiateList(items, mapper, instantiator) {
-            if (items && items.length) {
-                var result = [];
-                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
-                    var v = items_1[_i];
-                    result.push(instantiator(v, mapper));
-                }
-                return result;
-            }
-            return items;
-        }
-        function createUnaryTypeMapper(source, target) {
-            return function (t) { return t === source ? target : t; };
-        }
-        function createBinaryTypeMapper(source1, target1, source2, target2) {
-            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
-        }
-        function createArrayTypeMapper(sources, targets) {
-            return function (t) {
-                for (var i = 0; i < sources.length; i++) {
-                    if (t === sources[i]) {
-                        return targets ? targets[i] : anyType;
-                    }
-                }
-                return t;
-            };
-        }
-        function createTypeMapper(sources, targets) {
-            var count = sources.length;
-            var mapper = count == 1 ? createUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
-                count == 2 ? createBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
-                    createArrayTypeMapper(sources, targets);
-            mapper.mappedTypes = sources;
-            return mapper;
-        }
-        function createTypeEraser(sources) {
-            return createTypeMapper(sources, undefined);
-        }
-        function getInferenceMapper(context) {
-            if (!context.mapper) {
-                var mapper = function (t) {
-                    var typeParameters = context.typeParameters;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (t === typeParameters[i]) {
-                            context.inferences[i].isFixed = true;
-                            return getInferredType(context, i);
-                        }
-                    }
-                    return t;
-                };
-                mapper.mappedTypes = context.typeParameters;
-                mapper.context = context;
-                context.mapper = mapper;
-            }
-            return context.mapper;
-        }
-        function identityMapper(type) {
-            return type;
-        }
-        function combineTypeMappers(mapper1, mapper2) {
-            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
-            mapper.mappedTypes = mapper1.mappedTypes;
-            return mapper;
-        }
-        function cloneTypeParameter(typeParameter) {
-            var result = createType(512);
-            result.symbol = typeParameter.symbol;
-            result.target = typeParameter;
-            return result;
-        }
-        function cloneTypePredicate(predicate, mapper) {
-            if (ts.isIdentifierTypePredicate(predicate)) {
-                return {
-                    kind: 1,
-                    parameterName: predicate.parameterName,
-                    parameterIndex: predicate.parameterIndex,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
-            else {
-                return {
-                    kind: 0,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
-        }
-        function instantiateSignature(signature, mapper, eraseTypeParameters) {
-            var freshTypeParameters;
-            var freshTypePredicate;
-            if (signature.typeParameters && !eraseTypeParameters) {
-                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
-                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
-                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
-                    var tp = freshTypeParameters_1[_i];
-                    tp.mapper = mapper;
-                }
-            }
-            if (signature.typePredicate) {
-                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
-            }
-            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisType && instantiateType(signature.thisType, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), instantiateType(signature.resolvedReturnType, mapper), freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasStringLiterals);
-            result.target = signature;
-            result.mapper = mapper;
-            return result;
-        }
-        function instantiateSymbol(symbol, mapper) {
-            if (symbol.flags & 16777216) {
-                var links = getSymbolLinks(symbol);
-                symbol = links.target;
-                mapper = combineTypeMappers(links.mapper, mapper);
-            }
-            var result = createSymbol(16777216 | 67108864 | symbol.flags, symbol.name);
-            result.declarations = symbol.declarations;
-            result.parent = symbol.parent;
-            result.target = symbol;
-            result.mapper = mapper;
-            if (symbol.valueDeclaration) {
-                result.valueDeclaration = symbol.valueDeclaration;
-            }
-            return result;
-        }
-        function instantiateAnonymousType(type, mapper) {
-            if (mapper.instantiations) {
-                var cachedType = mapper.instantiations[type.id];
-                if (cachedType) {
-                    return cachedType;
-                }
-            }
-            else {
-                mapper.instantiations = [];
-            }
-            var result = createObjectType(65536 | 131072, type.symbol);
-            result.target = type;
-            result.mapper = mapper;
-            mapper.instantiations[type.id] = result;
-            return result;
-        }
-        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
-            var mappedTypes = mapper.mappedTypes;
-            var node = symbol.declarations[0].parent;
-            while (node) {
-                switch (node.kind) {
-                    case 156:
-                    case 157:
-                    case 220:
-                    case 147:
-                    case 146:
-                    case 148:
-                    case 151:
-                    case 152:
-                    case 153:
-                    case 149:
-                    case 150:
-                    case 179:
-                    case 180:
-                    case 221:
-                    case 192:
-                    case 222:
-                    case 223:
-                        var declaration = node;
-                        if (declaration.typeParameters) {
-                            for (var _i = 0, _a = declaration.typeParameters; _i < _a.length; _i++) {
-                                var d = _a[_i];
-                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
-                                    return true;
-                                }
-                            }
-                        }
-                        if (ts.isClassLike(node) || node.kind === 222) {
-                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
-                            if (thisType && ts.contains(mappedTypes, thisType)) {
-                                return true;
-                            }
-                        }
-                        break;
-                    case 225:
-                    case 256:
-                        return false;
-                }
-                node = node.parent;
-            }
-            return false;
-        }
-        function instantiateType(type, mapper) {
-            if (type && mapper !== identityMapper) {
-                if (type.flags & 512) {
-                    return mapper(type);
-                }
-                if (type.flags & 65536) {
-                    return type.symbol &&
-                        type.symbol.flags & (16 | 8192 | 32 | 2048 | 4096) &&
-                        (type.flags & 131072 || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
-                        instantiateAnonymousType(type, mapper) : type;
-                }
-                if (type.flags & 4096) {
-                    return createTypeReference(type.target, instantiateList(type.typeArguments, mapper, instantiateType));
-                }
-                if (type.flags & 8192) {
-                    return createTupleType(instantiateList(type.elementTypes, mapper, instantiateType));
-                }
-                if (type.flags & 16384) {
-                    return getUnionType(instantiateList(type.types, mapper, instantiateType), true);
-                }
-                if (type.flags & 32768) {
-                    return getIntersectionType(instantiateList(type.types, mapper, instantiateType));
-                }
-            }
-            return type;
-        }
-        function instantiateIndexInfo(info, mapper) {
-            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
-        }
-        function isContextSensitive(node) {
-            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
-            switch (node.kind) {
-                case 179:
-                case 180:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 171:
-                    return ts.forEach(node.properties, isContextSensitive);
-                case 170:
-                    return ts.forEach(node.elements, isContextSensitive);
-                case 188:
-                    return isContextSensitive(node.whenTrue) ||
-                        isContextSensitive(node.whenFalse);
-                case 187:
-                    return node.operatorToken.kind === 52 &&
-                        (isContextSensitive(node.left) || isContextSensitive(node.right));
-                case 253:
-                    return isContextSensitive(node.initializer);
-                case 147:
-                case 146:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 178:
-                    return isContextSensitive(node.expression);
-            }
-            return false;
-        }
-        function isContextSensitiveFunctionLikeDeclaration(node) {
-            var areAllParametersUntyped = !ts.forEach(node.parameters, function (p) { return p.type; });
-            var isNullaryArrow = node.kind === 180 && !node.parameters.length;
-            return !node.typeParameters && areAllParametersUntyped && !isNullaryArrow;
-        }
-        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
-            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
-        }
-        function getTypeWithoutSignatures(type) {
-            if (type.flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.constructSignatures.length) {
-                    var result = createObjectType(65536, type.symbol);
-                    result.members = resolved.members;
-                    result.properties = resolved.properties;
-                    result.callSignatures = emptyArray;
-                    result.constructSignatures = emptyArray;
-                    type = result;
-                }
-            }
-            return type;
-        }
-        function isTypeIdenticalTo(source, target) {
-            return checkTypeRelatedTo(source, target, identityRelation, undefined);
-        }
-        function compareTypesIdentical(source, target) {
-            return checkTypeRelatedTo(source, target, identityRelation, undefined) ? -1 : 0;
-        }
-        function compareTypesAssignable(source, target) {
-            return checkTypeRelatedTo(source, target, assignableRelation, undefined) ? -1 : 0;
-        }
-        function isTypeSubtypeOf(source, target) {
-            return checkTypeSubtypeOf(source, target, undefined);
-        }
-        function isTypeAssignableTo(source, target) {
-            return checkTypeAssignableTo(source, target, undefined);
-        }
-        function isTypeComparableTo(source, target) {
-            return checkTypeComparableTo(source, target, undefined);
-        }
-        function checkTypeSubtypeOf(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
-            return compareSignaturesRelated(source, target, ignoreReturnTypes, false, undefined, compareTypesAssignable) !== 0;
-        }
-        function compareSignaturesRelated(source, target, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
-            if (source === target) {
-                return -1;
-            }
-            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
-                return 0;
-            }
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1;
-            if (source.thisType && target.thisType && source.thisType !== voidType) {
-                var related = compareTypes(source.thisType, target.thisType, false)
-                    || compareTypes(target.thisType, source.thisType, reportErrors);
-                if (!related) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
-                    }
-                    return 0;
-                }
-                result &= related;
-            }
-            var sourceMax = getNumNonRestParameters(source);
-            var targetMax = getNumNonRestParameters(target);
-            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
-            var sourceParams = source.parameters;
-            var targetParams = target.parameters;
-            for (var i = 0; i < checkCount; i++) {
-                var s = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
-                var t = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
-                var related = compareTypes(s, t, false) || compareTypes(t, s, reportErrors);
-                if (!related) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
-                    }
-                    return 0;
-                }
-                result &= related;
-            }
-            if (!ignoreReturnTypes) {
-                var targetReturnType = getReturnTypeOfSignature(target);
-                if (targetReturnType === voidType) {
-                    return result;
-                }
-                var sourceReturnType = getReturnTypeOfSignature(source);
-                if (target.typePredicate) {
-                    if (source.typePredicate) {
-                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
-                    }
-                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
-                        if (reportErrors) {
-                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
-                        }
-                        return 0;
-                    }
-                }
-                else {
-                    result &= compareTypes(sourceReturnType, targetReturnType, reportErrors);
-                }
-            }
-            return result;
-        }
-        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
-            if (source.kind !== target.kind) {
-                if (reportErrors) {
-                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
-                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-                }
-                return 0;
-            }
-            if (source.kind === 1) {
-                var sourceIdentifierPredicate = source;
-                var targetIdentifierPredicate = target;
-                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
-                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-                    }
-                    return 0;
-                }
-            }
-            var related = compareTypes(source.type, target.type, reportErrors);
-            if (related === 0 && reportErrors) {
-                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-            }
-            return related;
-        }
-        function isImplementationCompatibleWithOverload(implementation, overload) {
-            var erasedSource = getErasedSignature(implementation);
-            var erasedTarget = getErasedSignature(overload);
-            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
-            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
-            if (targetReturnType === voidType
-                || checkTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation, undefined)
-                || checkTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation, undefined)) {
-                return isSignatureAssignableTo(erasedSource, erasedTarget, true);
-            }
-            return false;
-        }
-        function getNumNonRestParameters(signature) {
-            var numParams = signature.parameters.length;
-            return signature.hasRestParameter ?
-                numParams - 1 :
-                numParams;
-        }
-        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
-            if (source.hasRestParameter === target.hasRestParameter) {
-                if (source.hasRestParameter) {
-                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
-                }
-                else {
-                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
-                }
-            }
-            else {
-                return source.hasRestParameter ?
-                    targetNonRestParamCount :
-                    sourceNonRestParamCount;
-            }
-        }
-        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
-            var errorInfo;
-            var sourceStack;
-            var targetStack;
-            var maybeStack;
-            var expandingFlags;
-            var depth = 0;
-            var overflow = false;
-            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
-            var result = isRelatedTo(source, target, !!errorNode, headMessage);
-            if (overflow) {
-                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
-            }
-            else if (errorInfo) {
-                if (containingMessageChain) {
-                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
-                }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
-            }
-            return result !== 0;
-            function reportError(message, arg0, arg1, arg2) {
-                ts.Debug.assert(!!errorNode);
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
-            }
-            function reportRelationError(message, source, target) {
-                var sourceType = typeToString(source);
-                var targetType = typeToString(target);
-                if (sourceType === targetType) {
-                    sourceType = typeToString(source, undefined, 128);
-                    targetType = typeToString(target, undefined, 128);
-                }
-                if (!message) {
-                    message = relation === comparableRelation ?
-                        ts.Diagnostics.Type_0_is_not_comparable_to_type_1 :
-                        ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
-                }
-                reportError(message, sourceType, targetType);
-            }
-            function isRelatedTo(source, target, reportErrors, headMessage) {
-                var result;
-                if (source === target)
-                    return -1;
-                if (relation === identityRelation) {
-                    return isIdenticalTo(source, target);
-                }
-                if (!(target.flags & 134217728)) {
-                    if (target.flags & 1 || source.flags & 134217728)
-                        return -1;
-                    if (source.flags & 32) {
-                        if (!strictNullChecks || target.flags & (32 | 16) || source === emptyArrayElementType)
-                            return -1;
-                    }
-                    if (source.flags & 64) {
-                        if (!strictNullChecks || target.flags & 64)
-                            return -1;
-                    }
-                    if (source.flags & 128 && target === numberType)
-                        return -1;
-                    if (source.flags & 128 && target.flags & 128) {
-                        if (result = enumRelatedTo(source, target, reportErrors)) {
-                            return result;
-                        }
-                    }
-                    if (source.flags & 256 && target === stringType)
-                        return -1;
-                    if (relation === assignableRelation || relation === comparableRelation) {
-                        if (source.flags & 1)
-                            return -1;
-                        if (source === numberType && target.flags & 128)
-                            return -1;
-                    }
-                    if (source.flags & 8 && target.flags & 8) {
-                        return -1;
-                    }
-                }
-                if (source.flags & 1048576) {
-                    if (hasExcessProperties(source, target, reportErrors)) {
-                        if (reportErrors) {
-                            reportRelationError(headMessage, source, target);
-                        }
-                        return 0;
-                    }
-                    if (target.flags & 49152) {
-                        source = getRegularTypeOfObjectLiteral(source);
-                    }
-                }
-                var saveErrorInfo = errorInfo;
-                if (source.flags & 16384) {
-                    if (relation === comparableRelation) {
-                        result = someTypeRelatedToType(source, target, reportErrors);
-                    }
-                    else {
-                        result = eachTypeRelatedToType(source, target, reportErrors);
-                    }
-                    if (result) {
-                        return result;
-                    }
-                }
-                else if (target.flags & 32768) {
-                    result = typeRelatedToEachType(source, target, reportErrors);
-                    if (result) {
-                        return result;
-                    }
-                }
-                else {
-                    if (source.flags & 32768) {
-                        if (result = someTypeRelatedToType(source, target, false)) {
-                            return result;
-                        }
-                    }
-                    if (target.flags & 16384) {
-                        if (result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 16777726))) {
-                            return result;
-                        }
-                    }
-                }
-                if (source.flags & 512) {
-                    var constraint = getConstraintOfTypeParameter(source);
-                    if (!constraint || constraint.flags & 1) {
-                        constraint = emptyObjectType;
-                    }
-                    constraint = getTypeWithThisArgument(constraint, source);
-                    var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
-                    if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
-                        errorInfo = saveErrorInfo;
-                        return result;
-                    }
-                }
-                else {
-                    if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
-                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
-                            return result;
-                        }
-                    }
-                    var apparentSource = getApparentType(source);
-                    if (apparentSource.flags & (80896 | 32768) && target.flags & 80896) {
-                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !(source.flags & 16777726);
-                        if (result = objectTypeRelatedTo(apparentSource, source, target, reportStructuralErrors)) {
-                            errorInfo = saveErrorInfo;
-                            return result;
-                        }
-                    }
-                }
-                if (reportErrors) {
-                    reportRelationError(headMessage, source, target);
-                }
-                return 0;
-            }
-            function isIdenticalTo(source, target) {
-                var result;
-                if (source.flags & 80896 && target.flags & 80896) {
-                    if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
-                        if (result = typeArgumentsRelatedTo(source, target, false)) {
-                            return result;
-                        }
-                    }
-                    return objectTypeRelatedTo(source, source, target, false);
-                }
-                if (source.flags & 16384 && target.flags & 16384 ||
-                    source.flags & 32768 && target.flags & 32768) {
-                    if (result = eachTypeRelatedToSomeType(source, target, false)) {
-                        if (result &= eachTypeRelatedToSomeType(target, source, false)) {
-                            return result;
-                        }
-                    }
-                }
-                return 0;
-            }
-            function isKnownProperty(type, name) {
-                if (type.flags & 80896) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if ((relation === assignableRelation || relation === comparableRelation) &&
-                        (type === globalObjectType || isEmptyObjectType(resolved)) ||
-                        resolved.stringIndexInfo || resolved.numberIndexInfo || getPropertyOfType(type, name)) {
-                        return true;
-                    }
-                }
-                else if (type.flags & 49152) {
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (isKnownProperty(t, name)) {
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
-            function isEmptyObjectType(t) {
-                return t.properties.length === 0 &&
-                    t.callSignatures.length === 0 &&
-                    t.constructSignatures.length === 0 &&
-                    !t.stringIndexInfo &&
-                    !t.numberIndexInfo;
-            }
-            function hasExcessProperties(source, target, reportErrors) {
-                if (!(target.flags & 67108864) && maybeTypeOfKind(target, 80896)) {
-                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                        var prop = _a[_i];
-                        if (!isKnownProperty(target, prop.name)) {
-                            if (reportErrors) {
-                                ts.Debug.assert(!!errorNode);
-                                errorNode = prop.valueDeclaration;
-                                reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
-                            }
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
-            function eachTypeRelatedToSomeType(source, target, reportErrors) {
-                var result = -1;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
-                    var sourceType = sourceTypes_1[_i];
-                    var related = typeRelatedToSomeType(sourceType, target, false);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function typeRelatedToSomeType(source, target, reportErrors) {
-                var targetTypes = target.types;
-                var len = targetTypes.length;
-                while (len >= 2 && targetTypes[len - 1].flags & 96) {
-                    var related = isRelatedTo(source, targetTypes[len - 1], false);
-                    if (related) {
-                        return related;
-                    }
-                    len--;
-                }
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(source, targetTypes[i], reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
-                    }
-                }
-                return 0;
-            }
-            function typeRelatedToEachType(source, target, reportErrors) {
-                var result = -1;
-                var targetTypes = target.types;
-                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
-                    var targetType = targetTypes_1[_i];
-                    var related = isRelatedTo(source, targetType, reportErrors);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function someTypeRelatedToType(source, target, reportErrors) {
-                var sourceTypes = source.types;
-                var len = sourceTypes.length;
-                while (len >= 2 && sourceTypes[len - 1].flags & 96) {
-                    var related = isRelatedTo(sourceTypes[len - 1], target, false);
-                    if (related) {
-                        return related;
-                    }
-                    len--;
-                }
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
-                    }
-                }
-                return 0;
-            }
-            function eachTypeRelatedToType(source, target, reportErrors) {
-                var result = -1;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
-                    var sourceType = sourceTypes_2[_i];
-                    var related = isRelatedTo(sourceType, target, reportErrors);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function typeArgumentsRelatedTo(source, target, reportErrors) {
-                var sources = source.typeArguments || emptyArray;
-                var targets = target.typeArguments || emptyArray;
-                if (sources.length !== targets.length && relation === identityRelation) {
-                    return 0;
-                }
-                var length = sources.length <= targets.length ? sources.length : targets.length;
-                var result = -1;
-                for (var i = 0; i < length; i++) {
-                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function objectTypeRelatedTo(source, originalSource, target, reportErrors) {
-                if (overflow) {
-                    return 0;
-                }
-                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
-                var related = relation[id];
-                if (related !== undefined) {
-                    if (reportErrors && related === 2) {
-                        relation[id] = 3;
-                    }
-                    else {
-                        return related === 1 ? -1 : 0;
-                    }
-                }
-                if (depth > 0) {
-                    for (var i = 0; i < depth; i++) {
-                        if (maybeStack[i][id]) {
-                            return 1;
-                        }
-                    }
-                    if (depth === 100) {
-                        overflow = true;
-                        return 0;
-                    }
-                }
-                else {
-                    sourceStack = [];
-                    targetStack = [];
-                    maybeStack = [];
-                    expandingFlags = 0;
-                }
-                sourceStack[depth] = source;
-                targetStack[depth] = target;
-                maybeStack[depth] = {};
-                maybeStack[depth][id] = 1;
-                depth++;
-                var saveExpandingFlags = expandingFlags;
-                if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth))
-                    expandingFlags |= 1;
-                if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth))
-                    expandingFlags |= 2;
-                var result;
-                if (expandingFlags === 3) {
-                    result = 1;
-                }
-                else {
-                    result = propertiesRelatedTo(source, target, reportErrors);
-                    if (result) {
-                        result &= signaturesRelatedTo(source, target, 0, reportErrors);
-                        if (result) {
-                            result &= signaturesRelatedTo(source, target, 1, reportErrors);
-                            if (result) {
-                                result &= indexTypesRelatedTo(source, originalSource, target, 0, reportErrors);
-                                if (result) {
-                                    result &= indexTypesRelatedTo(source, originalSource, target, 1, reportErrors);
-                                }
-                            }
-                        }
-                    }
-                }
-                expandingFlags = saveExpandingFlags;
-                depth--;
-                if (result) {
-                    var maybeCache = maybeStack[depth];
-                    var destinationCache = (result === -1 || depth === 0) ? relation : maybeStack[depth - 1];
-                    ts.copyMap(maybeCache, destinationCache);
-                }
-                else {
-                    relation[id] = reportErrors ? 3 : 2;
-                }
-                return result;
-            }
-            function propertiesRelatedTo(source, target, reportErrors) {
-                if (relation === identityRelation) {
-                    return propertiesIdenticalTo(source, target);
-                }
-                var result = -1;
-                var properties = getPropertiesOfObjectType(target);
-                var requireOptionalProperties = relation === subtypeRelation && !(source.flags & 524288);
-                for (var _i = 0, properties_1 = properties; _i < properties_1.length; _i++) {
-                    var targetProp = properties_1[_i];
-                    var sourceProp = getPropertyOfType(source, targetProp.name);
-                    if (sourceProp !== targetProp) {
-                        if (!sourceProp) {
-                            if (!(targetProp.flags & 536870912) || requireOptionalProperties) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
-                                }
-                                return 0;
-                            }
-                        }
-                        else if (!(targetProp.flags & 134217728)) {
-                            var sourcePropFlags = getDeclarationFlagsFromSymbol(sourceProp);
-                            var targetPropFlags = getDeclarationFlagsFromSymbol(targetProp);
-                            if (sourcePropFlags & 8 || targetPropFlags & 8) {
-                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
-                                    if (reportErrors) {
-                                        if (sourcePropFlags & 8 && targetPropFlags & 8) {
-                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
-                                        }
-                                        else {
-                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 ? source : target), typeToString(sourcePropFlags & 8 ? target : source));
-                                        }
-                                    }
-                                    return 0;
-                                }
-                            }
-                            else if (targetPropFlags & 16) {
-                                var sourceDeclaredInClass = sourceProp.parent && sourceProp.parent.flags & 32;
-                                var sourceClass = sourceDeclaredInClass ? getDeclaredTypeOfSymbol(getParentOfSymbol(sourceProp)) : undefined;
-                                var targetClass = getDeclaredTypeOfSymbol(getParentOfSymbol(targetProp));
-                                if (!sourceClass || !hasBaseType(sourceClass, targetClass)) {
-                                    if (reportErrors) {
-                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(sourceClass || source), typeToString(targetClass));
-                                    }
-                                    return 0;
-                                }
-                            }
-                            else if (sourcePropFlags & 16) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0;
-                            }
-                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
-                            if (!related) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
-                                }
-                                return 0;
-                            }
-                            result &= related;
-                            if (sourceProp.flags & 536870912 && !(targetProp.flags & 536870912)) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0;
-                            }
-                        }
-                    }
-                }
-                return result;
-            }
-            function propertiesIdenticalTo(source, target) {
-                if (!(source.flags & 80896 && target.flags & 80896)) {
-                    return 0;
-                }
-                var sourceProperties = getPropertiesOfObjectType(source);
-                var targetProperties = getPropertiesOfObjectType(target);
-                if (sourceProperties.length !== targetProperties.length) {
-                    return 0;
-                }
-                var result = -1;
-                for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
-                    var sourceProp = sourceProperties_1[_i];
-                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
-                    if (!targetProp) {
-                        return 0;
-                    }
-                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function signaturesRelatedTo(source, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return signaturesIdenticalTo(source, target, kind);
-                }
-                if (target === anyFunctionType || source === anyFunctionType) {
-                    return -1;
-                }
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (kind === 1 && sourceSignatures.length && targetSignatures.length) {
-                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
-                        if (reportErrors) {
-                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
-                        }
-                        return 0;
-                    }
-                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
-                        return 0;
-                    }
-                }
-                var result = -1;
-                var saveErrorInfo = errorInfo;
-                outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
-                    var t = targetSignatures_1[_i];
-                    var shouldElaborateErrors = reportErrors;
-                    for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
-                        var s = sourceSignatures_1[_a];
-                        var related = signatureRelatedTo(s, t, shouldElaborateErrors);
-                        if (related) {
-                            result &= related;
-                            errorInfo = saveErrorInfo;
-                            continue outer;
-                        }
-                        shouldElaborateErrors = false;
-                    }
-                    if (shouldElaborateErrors) {
-                        reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, undefined, undefined, kind));
-                    }
-                    return 0;
-                }
-                return result;
-            }
-            function signatureRelatedTo(source, target, reportErrors) {
-                return compareSignaturesRelated(source, target, false, reportErrors, reportError, isRelatedTo);
-            }
-            function signaturesIdenticalTo(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (sourceSignatures.length !== targetSignatures.length) {
-                    return 0;
-                }
-                var result = -1;
-                for (var i = 0, len = sourceSignatures.length; i < len; i++) {
-                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], false, false, false, isRelatedTo);
-                    if (!related) {
-                        return 0;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
-                var result = -1;
-                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 || isNumericLiteralName(prop.name)) {
-                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
-                        if (!related) {
-                            if (reportErrors) {
-                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
-                            }
-                            return 0;
-                        }
-                        result &= related;
-                    }
-                }
-                return result;
-            }
-            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
-                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
-                if (!related && reportErrors) {
-                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
-                }
-                return related;
-            }
-            function indexTypesRelatedTo(source, originalSource, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return indexTypesIdenticalTo(source, target, kind);
-                }
-                var targetInfo = getIndexInfoOfType(target, kind);
-                if (!targetInfo || ((targetInfo.type.flags & 1) && !(originalSource.flags & 16777726))) {
-                    return -1;
-                }
-                var sourceInfo = getIndexInfoOfType(source, kind) ||
-                    kind === 1 && getIndexInfoOfType(source, 0);
-                if (sourceInfo) {
-                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
-                }
-                if (isObjectLiteralType(source)) {
-                    var related = -1;
-                    if (kind === 0) {
-                        var sourceNumberInfo = getIndexInfoOfType(source, 1);
-                        if (sourceNumberInfo) {
-                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
-                        }
-                    }
-                    if (related) {
-                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
-                    }
-                    return related;
-                }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
-                }
-                return 0;
-            }
-            function indexTypesIdenticalTo(source, target, indexKind) {
-                var targetInfo = getIndexInfoOfType(target, indexKind);
-                var sourceInfo = getIndexInfoOfType(source, indexKind);
-                if (!sourceInfo && !targetInfo) {
-                    return -1;
-                }
-                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
-                    return isRelatedTo(sourceInfo.type, targetInfo.type);
-                }
-                return 0;
-            }
-            function enumRelatedTo(source, target, reportErrors) {
-                if (source.symbol.name !== target.symbol.name ||
-                    source.symbol.flags & 128 ||
-                    target.symbol.flags & 128) {
-                    return 0;
-                }
-                var targetEnumType = getTypeOfSymbol(target.symbol);
-                for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
-                    var property = _a[_i];
-                    if (property.flags & 8) {
-                        var targetProperty = getPropertyOfType(targetEnumType, property.name);
-                        if (!targetProperty || !(targetProperty.flags & 8)) {
-                            if (reportErrors) {
-                                reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, undefined, 128));
-                            }
-                            return 0;
-                        }
-                    }
-                }
-                return -1;
-            }
-            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
-                if (!sourceSignature.declaration || !targetSignature.declaration) {
-                    return true;
-                }
-                var sourceAccessibility = sourceSignature.declaration.flags & (8 | 16);
-                var targetAccessibility = targetSignature.declaration.flags & (8 | 16);
-                if (targetAccessibility === 8) {
-                    return true;
-                }
-                if (targetAccessibility === 16 && sourceAccessibility !== 8) {
-                    return true;
-                }
-                if (targetAccessibility !== 16 && !sourceAccessibility) {
-                    return true;
-                }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
-                }
-                return false;
-            }
-        }
-        function isAbstractConstructorType(type) {
-            if (type.flags & 65536) {
-                var symbol = type.symbol;
-                if (symbol && symbol.flags & 32) {
-                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
-                    if (declaration && declaration.flags & 128) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isDeeplyNestedGeneric(type, stack, depth) {
-            if (type.flags & (4096 | 131072) && depth >= 5) {
-                var symbol = type.symbol;
-                var count = 0;
-                for (var i = 0; i < depth; i++) {
-                    var t = stack[i];
-                    if (t.flags & (4096 | 131072) && t.symbol === symbol) {
-                        count++;
-                        if (count >= 5)
-                            return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isPropertyIdenticalTo(sourceProp, targetProp) {
-            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0;
-        }
-        function compareProperties(sourceProp, targetProp, compareTypes) {
-            if (sourceProp === targetProp) {
-                return -1;
-            }
-            var sourcePropAccessibility = getDeclarationFlagsFromSymbol(sourceProp) & (8 | 16);
-            var targetPropAccessibility = getDeclarationFlagsFromSymbol(targetProp) & (8 | 16);
-            if (sourcePropAccessibility !== targetPropAccessibility) {
-                return 0;
-            }
-            if (sourcePropAccessibility) {
-                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
-                    return 0;
-                }
-            }
-            else {
-                if ((sourceProp.flags & 536870912) !== (targetProp.flags & 536870912)) {
-                    return 0;
-                }
-            }
-            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
-                return 0;
-            }
-            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
-        }
-        function isMatchingSignature(source, target, partialMatch) {
-            if (source.parameters.length === target.parameters.length &&
-                source.minArgumentCount === target.minArgumentCount &&
-                source.hasRestParameter === target.hasRestParameter) {
-                return true;
-            }
-            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (source.hasRestParameter && !target.hasRestParameter ||
-                source.hasRestParameter === target.hasRestParameter && source.parameters.length >= target.parameters.length)) {
-                return true;
-            }
-            return false;
-        }
-        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
-            if (source === target) {
-                return -1;
-            }
-            if (!(isMatchingSignature(source, target, partialMatch))) {
-                return 0;
-            }
-            if ((source.typeParameters ? source.typeParameters.length : 0) !== (target.typeParameters ? target.typeParameters.length : 0)) {
-                return 0;
-            }
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1;
-            if (!ignoreThisTypes && source.thisType && target.thisType) {
-                var related = compareTypes(source.thisType, target.thisType);
-                if (!related) {
-                    return 0;
-                }
-                result &= related;
-            }
-            var targetLen = target.parameters.length;
-            for (var i = 0; i < targetLen; i++) {
-                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
-                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
-                var related = compareTypes(s, t);
-                if (!related) {
-                    return 0;
-                }
-                result &= related;
-            }
-            if (!ignoreReturnTypes) {
-                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
-            }
-            return result;
-        }
-        function isRestParameterIndex(signature, parameterIndex) {
-            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
-        }
-        function isSupertypeOfEach(candidate, types) {
-            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
-                var t = types_5[_i];
-                if (candidate !== t && !isTypeSubtypeOf(t, candidate))
-                    return false;
-            }
-            return true;
-        }
-        function getCombinedFlagsOfTypes(types) {
-            var flags = 0;
-            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
-                var t = types_6[_i];
-                flags |= t.flags;
-            }
-            return flags;
-        }
-        function getCommonSupertype(types) {
-            if (!strictNullChecks) {
-                return ts.forEach(types, function (t) { return isSupertypeOfEach(t, types) ? t : undefined; });
-            }
-            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 96); });
-            if (!primaryTypes.length) {
-                return getUnionType(types);
-            }
-            var supertype = ts.forEach(primaryTypes, function (t) { return isSupertypeOfEach(t, primaryTypes) ? t : undefined; });
-            return supertype && addNullableKind(supertype, getCombinedFlagsOfTypes(types) & 96);
-        }
-        function reportNoCommonSupertypeError(types, errorLocation, errorMessageChainHead) {
-            var bestSupertype;
-            var bestSupertypeDownfallType;
-            var bestSupertypeScore = 0;
-            for (var i = 0; i < types.length; i++) {
-                var score = 0;
-                var downfallType = undefined;
-                for (var j = 0; j < types.length; j++) {
-                    if (isTypeSubtypeOf(types[j], types[i])) {
-                        score++;
-                    }
-                    else if (!downfallType) {
-                        downfallType = types[j];
-                    }
-                }
-                ts.Debug.assert(!!downfallType, "If there is no common supertype, each type should have a downfallType");
-                if (score > bestSupertypeScore) {
-                    bestSupertype = types[i];
-                    bestSupertypeDownfallType = downfallType;
-                    bestSupertypeScore = score;
-                }
-                if (bestSupertypeScore === types.length - 1) {
-                    break;
-                }
-            }
-            checkTypeSubtypeOf(bestSupertypeDownfallType, bestSupertype, errorLocation, ts.Diagnostics.Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0, errorMessageChainHead);
-        }
-        function isArrayType(type) {
-            return type.flags & 4096 && type.target === globalArrayType;
-        }
-        function isArrayLikeType(type) {
-            return type.flags & 4096 && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
-                !(type.flags & 96) && isTypeAssignableTo(type, anyReadonlyArrayType);
-        }
-        function isTupleLikeType(type) {
-            return !!getPropertyOfType(type, "0");
-        }
-        function isStringLiteralType(type) {
-            return type.flags & 256;
-        }
-        function isTupleType(type) {
-            return !!(type.flags & 8192);
-        }
-        function getNullableKind(type) {
-            var flags = type.flags;
-            if (flags & 16384) {
-                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    flags |= t.flags;
-                }
-            }
-            return flags & 96;
-        }
-        function addNullableKind(type, kind) {
-            if ((getNullableKind(type) & kind) !== kind) {
-                var types = [type];
-                if (kind & 32) {
-                    types.push(undefinedType);
-                }
-                if (kind & 64) {
-                    types.push(nullType);
-                }
-                type = getUnionType(types);
-            }
-            return type;
-        }
-        function getNonNullableType(type) {
-            return strictNullChecks ? getTypeWithFacts(type, 524288) : type;
-        }
-        function isObjectLiteralType(type) {
-            return type.symbol && (type.symbol.flags & (4096 | 2048)) !== 0 &&
-                getSignaturesOfType(type, 0).length === 0 &&
-                getSignaturesOfType(type, 1).length === 0;
-        }
-        function createTransientSymbol(source, type) {
-            var symbol = createSymbol(source.flags | 67108864, source.name);
-            symbol.declarations = source.declarations;
-            symbol.parent = source.parent;
-            symbol.type = type;
-            symbol.target = source;
-            if (source.valueDeclaration) {
-                symbol.valueDeclaration = source.valueDeclaration;
-            }
-            return symbol;
-        }
-        function transformTypeOfMembers(type, f) {
-            var members = {};
-            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
-                var property = _a[_i];
-                var original = getTypeOfSymbol(property);
-                var updated = f(original);
-                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
-            }
-            ;
-            return members;
-        }
-        function getRegularTypeOfObjectLiteral(type) {
-            if (!(type.flags & 1048576)) {
-                return type;
-            }
-            var regularType = type.regularType;
-            if (regularType) {
-                return regularType;
-            }
-            var resolved = type;
-            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
-            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
-            regularNew.flags = resolved.flags & ~1048576;
-            type.regularType = regularNew;
-            return regularNew;
-        }
-        function getWidenedTypeOfObjectLiteral(type) {
-            var members = transformTypeOfMembers(type, function (prop) {
-                var widened = getWidenedType(prop);
-                return prop === widened ? prop : widened;
-            });
-            var stringIndexInfo = getIndexInfoOfType(type, 0);
-            var numberIndexInfo = getIndexInfoOfType(type, 1);
-            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
-        }
-        function getWidenedConstituentType(type) {
-            return type.flags & 96 ? type : getWidenedType(type);
-        }
-        function getWidenedType(type) {
-            if (type.flags & 6291456) {
-                if (type.flags & 96) {
-                    return anyType;
-                }
-                if (type.flags & 524288) {
-                    return getWidenedTypeOfObjectLiteral(type);
-                }
-                if (type.flags & 16384) {
-                    return getUnionType(ts.map(type.types, getWidenedConstituentType), true);
-                }
-                if (isArrayType(type)) {
-                    return createArrayType(getWidenedType(type.typeArguments[0]));
-                }
-                if (isTupleType(type)) {
-                    return createTupleType(ts.map(type.elementTypes, getWidenedType));
-                }
-            }
-            return type;
-        }
-        function reportWideningErrorsInType(type) {
-            var errorReported = false;
-            if (type.flags & 16384) {
-                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
-            }
-            if (isArrayType(type)) {
-                return reportWideningErrorsInType(type.typeArguments[0]);
-            }
-            if (isTupleType(type)) {
-                for (var _b = 0, _c = type.elementTypes; _b < _c.length; _b++) {
-                    var t = _c[_b];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
-            }
-            if (type.flags & 524288) {
-                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
-                    var p = _e[_d];
-                    var t = getTypeOfSymbol(p);
-                    if (t.flags & 2097152) {
-                        if (!reportWideningErrorsInType(t)) {
-                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
-                        }
-                        errorReported = true;
-                    }
-                }
-            }
-            return errorReported;
-        }
-        function reportImplicitAnyError(declaration, type) {
-            var typeAsString = typeToString(getWidenedType(type));
-            var diagnostic;
-            switch (declaration.kind) {
-                case 145:
-                case 144:
-                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
-                    break;
-                case 142:
-                    diagnostic = declaration.dotDotDotToken ?
-                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
-                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
-                    break;
-                case 169:
-                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
-                    break;
-                case 220:
-                case 147:
-                case 146:
-                case 149:
-                case 150:
-                case 179:
-                case 180:
-                    if (!declaration.name) {
-                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
-                        return;
-                    }
-                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
-                    break;
-                default:
-                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
-            }
-            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
-        }
-        function reportErrorsFromWidening(declaration, type) {
-            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & 2097152) {
-                if (!reportWideningErrorsInType(type)) {
-                    reportImplicitAnyError(declaration, type);
-                }
-            }
-        }
-        function forEachMatchingParameterType(source, target, callback) {
-            var sourceMax = source.parameters.length;
-            var targetMax = target.parameters.length;
-            var count;
-            if (source.hasRestParameter && target.hasRestParameter) {
-                count = Math.max(sourceMax, targetMax);
-            }
-            else if (source.hasRestParameter) {
-                count = targetMax;
-            }
-            else if (target.hasRestParameter) {
-                count = sourceMax;
-            }
-            else {
-                count = Math.min(sourceMax, targetMax);
-            }
-            for (var i = 0; i < count; i++) {
-                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
-            }
-        }
-        function createInferenceContext(typeParameters, inferUnionTypes) {
-            var inferences = ts.map(typeParameters, createTypeInferencesObject);
-            return {
-                typeParameters: typeParameters,
-                inferUnionTypes: inferUnionTypes,
-                inferences: inferences,
-                inferredTypes: new Array(typeParameters.length)
-            };
-        }
-        function createTypeInferencesObject() {
-            return {
-                primary: undefined,
-                secondary: undefined,
-                isFixed: false
-            };
-        }
-        function inferTypes(context, source, target) {
-            var sourceStack;
-            var targetStack;
-            var depth = 0;
-            var inferiority = 0;
-            var visited = {};
-            inferFromTypes(source, target);
-            function isInProcess(source, target) {
-                for (var i = 0; i < depth; i++) {
-                    if (source === sourceStack[i] && target === targetStack[i]) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function inferFromTypes(source, target) {
-                if (source.flags & 16384 && target.flags & 16384 ||
-                    source.flags & 32768 && target.flags & 32768) {
-                    var matchingTypes = void 0;
-                    for (var _i = 0, _a = target.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (typeIdenticalToSomeType(t, source.types)) {
-                            (matchingTypes || (matchingTypes = [])).push(t);
-                            inferFromTypes(t, t);
-                        }
-                    }
-                    if (matchingTypes) {
-                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
-                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
-                    }
-                }
-                if (target.flags & 512) {
-                    if (source.flags & 8388608) {
-                        return;
-                    }
-                    var typeParameters = context.typeParameters;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (target === typeParameters[i]) {
-                            var inferences = context.inferences[i];
-                            if (!inferences.isFixed) {
-                                var candidates = inferiority ?
-                                    inferences.secondary || (inferences.secondary = []) :
-                                    inferences.primary || (inferences.primary = []);
-                                if (!ts.contains(candidates, source)) {
-                                    candidates.push(source);
-                                }
-                            }
-                            return;
-                        }
-                    }
-                }
-                else if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
-                    var sourceTypes = source.typeArguments || emptyArray;
-                    var targetTypes = target.typeArguments || emptyArray;
-                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
-                    for (var i = 0; i < count; i++) {
-                        inferFromTypes(sourceTypes[i], targetTypes[i]);
-                    }
-                }
-                else if (source.flags & 8192 && target.flags & 8192 && source.elementTypes.length === target.elementTypes.length) {
-                    var sourceTypes = source.elementTypes;
-                    var targetTypes = target.elementTypes;
-                    for (var i = 0; i < sourceTypes.length; i++) {
-                        inferFromTypes(sourceTypes[i], targetTypes[i]);
-                    }
-                }
-                else if (target.flags & 49152) {
-                    var targetTypes = target.types;
-                    var typeParameterCount = 0;
-                    var typeParameter = void 0;
-                    for (var _b = 0, targetTypes_2 = targetTypes; _b < targetTypes_2.length; _b++) {
-                        var t = targetTypes_2[_b];
-                        if (t.flags & 512 && ts.contains(context.typeParameters, t)) {
-                            typeParameter = t;
-                            typeParameterCount++;
-                        }
-                        else {
-                            inferFromTypes(source, t);
-                        }
-                    }
-                    if (typeParameterCount === 1) {
-                        inferiority++;
-                        inferFromTypes(source, typeParameter);
-                        inferiority--;
-                    }
-                }
-                else if (source.flags & 49152) {
-                    var sourceTypes = source.types;
-                    for (var _c = 0, sourceTypes_3 = sourceTypes; _c < sourceTypes_3.length; _c++) {
-                        var sourceType = sourceTypes_3[_c];
-                        inferFromTypes(sourceType, target);
-                    }
-                }
-                else {
-                    source = getApparentType(source);
-                    if (source.flags & 80896 && (target.flags & 4096 && target.typeArguments ||
-                        target.flags & 8192 ||
-                        target.flags & 65536 && target.symbol && target.symbol.flags & (8192 | 2048 | 32))) {
-                        if (isInProcess(source, target)) {
-                            return;
-                        }
-                        if (isDeeplyNestedGeneric(source, sourceStack, depth) && isDeeplyNestedGeneric(target, targetStack, depth)) {
-                            return;
-                        }
-                        var key = source.id + "," + target.id;
-                        if (ts.hasProperty(visited, key)) {
-                            return;
-                        }
-                        visited[key] = true;
-                        if (depth === 0) {
-                            sourceStack = [];
-                            targetStack = [];
-                        }
-                        sourceStack[depth] = source;
-                        targetStack[depth] = target;
-                        depth++;
-                        inferFromProperties(source, target);
-                        inferFromSignatures(source, target, 0);
-                        inferFromSignatures(source, target, 1);
-                        inferFromIndexTypes(source, target);
-                        depth--;
-                    }
-                }
-            }
-            function inferFromProperties(source, target) {
-                var properties = getPropertiesOfObjectType(target);
-                for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
-                    var targetProp = properties_2[_i];
-                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
-                    if (sourceProp) {
-                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
-                    }
-                }
-            }
-            function inferFromSignatures(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                var sourceLen = sourceSignatures.length;
-                var targetLen = targetSignatures.length;
-                var len = sourceLen < targetLen ? sourceLen : targetLen;
-                for (var i = 0; i < len; i++) {
-                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
-                }
-            }
-            function inferFromSignature(source, target) {
-                forEachMatchingParameterType(source, target, inferFromTypes);
-                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
-                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
-                }
-                else {
-                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
-                }
-            }
-            function inferFromIndexTypes(source, target) {
-                var targetStringIndexType = getIndexTypeOfType(target, 0);
-                if (targetStringIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 0) ||
-                        getImplicitIndexTypeOfType(source, 0);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetStringIndexType);
-                    }
-                }
-                var targetNumberIndexType = getIndexTypeOfType(target, 1);
-                if (targetNumberIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 1) ||
-                        getIndexTypeOfType(source, 0) ||
-                        getImplicitIndexTypeOfType(source, 1);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetNumberIndexType);
-                    }
-                }
-            }
-        }
-        function typeIdenticalToSomeType(type, types) {
-            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
-                var t = types_7[_i];
-                if (isTypeIdenticalTo(t, type)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
-            var reducedTypes = [];
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (!typeIdenticalToSomeType(t, typesToRemove)) {
-                    reducedTypes.push(t);
-                }
-            }
-            return type.flags & 16384 ? getUnionType(reducedTypes, true) : getIntersectionType(reducedTypes);
-        }
-        function getInferenceCandidates(context, index) {
-            var inferences = context.inferences[index];
-            return inferences.primary || inferences.secondary || emptyArray;
-        }
-        function getInferredType(context, index) {
-            var inferredType = context.inferredTypes[index];
-            var inferenceSucceeded;
-            if (!inferredType) {
-                var inferences = getInferenceCandidates(context, index);
-                if (inferences.length) {
-                    var unionOrSuperType = context.inferUnionTypes ? getUnionType(inferences) : getCommonSupertype(inferences);
-                    inferredType = unionOrSuperType ? getWidenedType(unionOrSuperType) : unknownType;
-                    inferenceSucceeded = !!unionOrSuperType;
-                }
-                else {
-                    inferredType = emptyObjectType;
-                    inferenceSucceeded = true;
-                }
-                context.inferredTypes[index] = inferredType;
-                if (inferenceSucceeded) {
-                    var constraint = getConstraintOfTypeParameter(context.typeParameters[index]);
-                    if (constraint) {
-                        var instantiatedConstraint = instantiateType(constraint, getInferenceMapper(context));
-                        if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
-                            context.inferredTypes[index] = inferredType = instantiatedConstraint;
-                        }
-                    }
-                }
-                else if (context.failedTypeParameterIndex === undefined || context.failedTypeParameterIndex > index) {
-                    context.failedTypeParameterIndex = index;
-                }
-            }
-            return inferredType;
-        }
-        function getInferredTypes(context) {
-            for (var i = 0; i < context.inferredTypes.length; i++) {
-                getInferredType(context, i);
-            }
-            return context.inferredTypes;
-        }
-        function getResolvedSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 | 1048576, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol;
-            }
-            return links.resolvedSymbol;
-        }
-        function isInTypeQuery(node) {
-            while (node) {
-                switch (node.kind) {
-                    case 158:
-                        return true;
-                    case 69:
-                    case 139:
-                        node = node.parent;
-                        continue;
-                    default:
-                        return false;
-                }
-            }
-            ts.Debug.fail("should not get here");
-        }
-        function getFlowCacheKey(node) {
-            if (node.kind === 69) {
-                var symbol = getResolvedSymbol(node);
-                return symbol !== unknownSymbol ? "" + getSymbolId(symbol) : undefined;
-            }
-            if (node.kind === 97) {
-                return "0";
-            }
-            if (node.kind === 172) {
-                var key = getFlowCacheKey(node.expression);
-                return key && key + "." + node.name.text;
-            }
-            return undefined;
-        }
-        function isNullOrUndefinedLiteral(node) {
-            return node.kind === 93 ||
-                node.kind === 69 && getResolvedSymbol(node) === undefinedSymbol;
-        }
-        function getLeftmostIdentifierOrThis(node) {
-            switch (node.kind) {
-                case 69:
-                case 97:
-                    return node;
-                case 172:
-                    return getLeftmostIdentifierOrThis(node.expression);
-            }
-            return undefined;
-        }
-        function isMatchingReference(source, target) {
-            if (source.kind === target.kind) {
-                switch (source.kind) {
-                    case 69:
-                        return getResolvedSymbol(source) === getResolvedSymbol(target);
-                    case 97:
-                        return true;
-                    case 172:
-                        return source.name.text === target.name.text &&
-                            isMatchingReference(source.expression, target.expression);
-                }
-            }
-            return false;
-        }
-        function containsMatchingReference(source, target) {
-            while (source.kind === 172) {
-                source = source.expression;
-                if (isMatchingReference(source, target)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function isOrContainsMatchingReference(source, target) {
-            return isMatchingReference(source, target) || containsMatchingReference(source, target);
-        }
-        function hasMatchingArgument(callExpression, reference) {
-            if (callExpression.arguments) {
-                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
-                    var argument = _a[_i];
-                    if (isOrContainsMatchingReference(reference, argument)) {
-                        return true;
-                    }
-                }
-            }
-            if (callExpression.expression.kind === 172 &&
-                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
-                return true;
-            }
-            return false;
-        }
-        function getFlowNodeId(flow) {
-            if (!flow.id) {
-                flow.id = nextFlowId;
-                nextFlowId++;
-            }
-            return flow.id;
-        }
-        function typeMaybeAssignableTo(source, target) {
-            if (!(source.flags & 16384)) {
-                return isTypeAssignableTo(source, target);
-            }
-            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (isTypeAssignableTo(t, target)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function getAssignmentReducedType(declaredType, assignedType) {
-            if (declaredType !== assignedType && declaredType.flags & 16384) {
-                var reducedTypes = ts.filter(declaredType.types, function (t) { return typeMaybeAssignableTo(assignedType, t); });
-                if (reducedTypes.length) {
-                    return reducedTypes.length === 1 ? reducedTypes[0] : getUnionType(reducedTypes);
-                }
-            }
-            return declaredType;
-        }
-        function getTypeFacts(type) {
-            var flags = type.flags;
-            if (flags & 258) {
-                return strictNullChecks ? 4079361 : 4194049;
-            }
-            if (flags & 132) {
-                return strictNullChecks ? 4079234 : 4193922;
-            }
-            if (flags & 8) {
-                return strictNullChecks ? 4078980 : 4193668;
-            }
-            if (flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return resolved.callSignatures.length || resolved.constructSignatures.length || isTypeSubtypeOf(type, globalFunctionType) ?
-                    strictNullChecks ? 1970144 : 4181984 :
-                    strictNullChecks ? 1972176 : 4184016;
-            }
-            if (flags & (16 | 32)) {
-                return 2457472;
-            }
-            if (flags & 64) {
-                return 2340752;
-            }
-            if (flags & 16777216) {
-                return strictNullChecks ? 1981320 : 4193160;
-            }
-            if (flags & 512) {
-                var constraint = getConstraintOfTypeParameter(type);
-                return constraint ? getTypeFacts(constraint) : 4194303;
-            }
-            if (flags & 32768) {
-                return ts.reduceLeft(type.types, function (flags, type) { return flags |= getTypeFacts(type); }, 0);
-            }
-            return 4194303;
-        }
-        function getTypeWithFacts(type, include) {
-            if (!(type.flags & 16384)) {
-                return getTypeFacts(type) & include ? type : neverType;
-            }
-            var firstType;
-            var types;
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (getTypeFacts(t) & include) {
-                    if (!firstType) {
-                        firstType = t;
-                    }
-                    else {
-                        if (!types) {
-                            types = [firstType];
-                        }
-                        types.push(t);
-                    }
-                }
-            }
-            return firstType ? types ? getUnionType(types, true) : firstType : neverType;
-        }
-        function getTypeWithDefault(type, defaultExpression) {
-            if (defaultExpression) {
-                var defaultType = checkExpression(defaultExpression);
-                return getUnionType([getTypeWithFacts(type, 131072), defaultType]);
-            }
-            return type;
-        }
-        function getTypeOfDestructuredProperty(type, name) {
-            var text = getTextOfPropertyName(name);
-            return getTypeOfPropertyOfType(type, text) ||
-                isNumericLiteralName(text) && getIndexTypeOfType(type, 1) ||
-                getIndexTypeOfType(type, 0) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredArrayElement(type, index) {
-            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
-                checkIteratedTypeOrElementType(type, undefined, false) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredSpreadElement(type) {
-            return createArrayType(checkIteratedTypeOrElementType(type, undefined, false) || unknownType);
-        }
-        function getAssignedTypeOfBinaryExpression(node) {
-            return node.parent.kind === 170 || node.parent.kind === 253 ?
-                getTypeWithDefault(getAssignedType(node), node.right) :
-                checkExpression(node.right);
-        }
-        function getAssignedTypeOfArrayLiteralElement(node, element) {
-            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
-        }
-        function getAssignedTypeOfSpreadElement(node) {
-            return getTypeOfDestructuredSpreadElement(getAssignedType(node.parent));
-        }
-        function getAssignedTypeOfPropertyAssignment(node) {
-            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
-        }
-        function getAssignedTypeOfShorthandPropertyAssignment(node) {
-            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
-        }
-        function getAssignedType(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 207:
-                    return stringType;
-                case 208:
-                    return checkRightHandSideOfForOf(parent.expression) || unknownType;
-                case 187:
-                    return getAssignedTypeOfBinaryExpression(parent);
-                case 181:
-                    return undefinedType;
-                case 170:
-                    return getAssignedTypeOfArrayLiteralElement(parent, node);
-                case 191:
-                    return getAssignedTypeOfSpreadElement(parent);
-                case 253:
-                    return getAssignedTypeOfPropertyAssignment(parent);
-                case 254:
-                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
-            }
-            return unknownType;
-        }
-        function getInitialTypeOfBindingElement(node) {
-            var pattern = node.parent;
-            var parentType = getInitialType(pattern.parent);
-            var type = pattern.kind === 167 ?
-                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
-                !node.dotDotDotToken ?
-                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
-                    getTypeOfDestructuredSpreadElement(parentType);
-            return getTypeWithDefault(type, node.initializer);
-        }
-        function getTypeOfInitializer(node) {
-            var links = getNodeLinks(node);
-            return links.resolvedType || checkExpression(node);
-        }
-        function getInitialTypeOfVariableDeclaration(node) {
-            if (node.initializer) {
-                return getTypeOfInitializer(node.initializer);
-            }
-            if (node.parent.parent.kind === 207) {
-                return stringType;
-            }
-            if (node.parent.parent.kind === 208) {
-                return checkRightHandSideOfForOf(node.parent.parent.expression) || unknownType;
-            }
-            return unknownType;
-        }
-        function getInitialType(node) {
-            return node.kind === 218 ?
-                getInitialTypeOfVariableDeclaration(node) :
-                getInitialTypeOfBindingElement(node);
-        }
-        function getFlowTypeOfReference(reference, declaredType, assumeInitialized) {
-            var key;
-            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & 97793)) {
-                return declaredType;
-            }
-            var initialType = assumeInitialized ? declaredType : addNullableKind(declaredType, 32);
-            var visitedFlowStart = visitedFlowCount;
-            var result = getTypeAtFlowNode(reference.flowNode);
-            visitedFlowCount = visitedFlowStart;
-            if (reference.parent.kind === 196 && getTypeWithFacts(result, 524288) === neverType) {
-                return declaredType;
-            }
-            return result;
-            function getTypeAtFlowNode(flow) {
-                while (true) {
-                    if (flow.flags & 256) {
-                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
-                            if (visitedFlowNodes[i] === flow) {
-                                return visitedFlowTypes[i];
-                            }
-                        }
-                    }
-                    var type = void 0;
-                    if (flow.flags & 16) {
-                        type = getTypeAtFlowAssignment(flow);
-                        if (!type) {
-                            flow = flow.antecedent;
-                            continue;
-                        }
-                    }
-                    else if (flow.flags & 96) {
-                        type = getTypeAtFlowCondition(flow);
-                    }
-                    else if (flow.flags & 12) {
-                        if (flow.antecedents.length === 1) {
-                            flow = flow.antecedents[0];
-                            continue;
-                        }
-                        type = flow.flags & 4 ?
-                            getTypeAtFlowBranchLabel(flow) :
-                            getTypeAtFlowLoopLabel(flow);
-                    }
-                    else if (flow.flags & 1) {
-                        type = declaredType;
-                    }
-                    else {
-                        type = initialType;
-                    }
-                    if (flow.flags & 256) {
-                        visitedFlowNodes[visitedFlowCount] = flow;
-                        visitedFlowTypes[visitedFlowCount] = type;
-                        visitedFlowCount++;
-                    }
-                    return type;
-                }
-            }
-            function getTypeAtFlowAssignment(flow) {
-                var node = flow.node;
-                if ((node.kind === 218 || node.kind === 169) &&
-                    reference.kind === 69 &&
-                    getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(reference)) === getSymbolOfNode(node)) {
-                    return declaredType.flags & 16384 ?
-                        getAssignmentReducedType(declaredType, getInitialType(node)) :
-                        declaredType;
-                }
-                if (isMatchingReference(reference, node)) {
-                    return declaredType.flags & 16384 ?
-                        getAssignmentReducedType(declaredType, getAssignedType(node)) :
-                        declaredType;
-                }
-                if (containsMatchingReference(reference, node)) {
-                    return declaredType;
-                }
-                return undefined;
-            }
-            function getTypeAtFlowCondition(flow) {
-                var type = getTypeAtFlowNode(flow.antecedent);
-                if (type !== neverType) {
-                    var assumeTrue = (flow.flags & 32) !== 0;
-                    type = narrowType(type, flow.expression, assumeTrue);
-                    if (type === neverType) {
-                        type = narrowType(declaredType, flow.expression, assumeTrue);
-                    }
-                }
-                return type;
-            }
-            function getTypeAtFlowBranchLabel(flow) {
-                var antecedentTypes = [];
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    var type = getTypeAtFlowNode(antecedent);
-                    if (type === declaredType && declaredType === initialType) {
-                        return type;
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                }
-                return getUnionType(antecedentTypes);
-            }
-            function getTypeAtFlowLoopLabel(flow) {
-                var id = getFlowNodeId(flow);
-                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = {});
-                if (!key) {
-                    key = getFlowCacheKey(reference);
-                }
-                if (cache[key]) {
-                    return cache[key];
-                }
-                for (var i = flowLoopStart; i < flowLoopCount; i++) {
-                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key) {
-                        return getUnionType(flowLoopTypes[i]);
-                    }
-                }
-                var antecedentTypes = [];
-                flowLoopNodes[flowLoopCount] = flow;
-                flowLoopKeys[flowLoopCount] = key;
-                flowLoopTypes[flowLoopCount] = antecedentTypes;
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    flowLoopCount++;
-                    var type = getTypeAtFlowNode(antecedent);
-                    flowLoopCount--;
-                    if (cache[key]) {
-                        return cache[key];
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                    if (type === declaredType) {
-                        break;
-                    }
-                }
-                return cache[key] = getUnionType(antecedentTypes);
-            }
-            function narrowTypeByTruthiness(type, expr, assumeTrue) {
-                return isMatchingReference(reference, expr) ? getTypeWithFacts(type, assumeTrue ? 1048576 : 2097152) : type;
-            }
-            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
-                switch (expr.operatorToken.kind) {
-                    case 56:
-                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
-                    case 30:
-                    case 31:
-                    case 32:
-                    case 33:
-                        if (isNullOrUndefinedLiteral(expr.right)) {
-                            return narrowTypeByNullCheck(type, expr, assumeTrue);
-                        }
-                        if (expr.left.kind === 182 && expr.right.kind === 9) {
-                            return narrowTypeByTypeof(type, expr, assumeTrue);
-                        }
-                        break;
-                    case 91:
-                        return narrowTypeByInstanceof(type, expr, assumeTrue);
-                    case 24:
-                        return narrowType(type, expr.right, assumeTrue);
-                }
-                return type;
-            }
-            function narrowTypeByNullCheck(type, expr, assumeTrue) {
-                var operator = expr.operatorToken.kind;
-                if (operator === 31 || operator === 33) {
-                    assumeTrue = !assumeTrue;
-                }
-                if (!strictNullChecks || !isMatchingReference(reference, expr.left)) {
-                    return type;
-                }
-                var doubleEquals = operator === 30 || operator === 31;
-                var facts = doubleEquals ?
-                    assumeTrue ? 65536 : 524288 :
-                    expr.right.kind === 93 ?
-                        assumeTrue ? 32768 : 262144 :
-                        assumeTrue ? 16384 : 131072;
-                return getTypeWithFacts(type, facts);
-            }
-            function narrowTypeByTypeof(type, expr, assumeTrue) {
-                var left = expr.left;
-                var right = expr.right;
-                if (!isMatchingReference(reference, left.expression)) {
-                    if (containsMatchingReference(reference, left.expression)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                if (expr.operatorToken.kind === 31 ||
-                    expr.operatorToken.kind === 33) {
-                    assumeTrue = !assumeTrue;
-                }
-                if (assumeTrue && !(type.flags & 16384)) {
-                    var targetType = ts.getProperty(typeofTypesByName, right.text);
-                    if (targetType && isTypeSubtypeOf(targetType, type)) {
-                        return targetType;
-                    }
-                }
-                var facts = assumeTrue ?
-                    ts.getProperty(typeofEQFacts, right.text) || 64 :
-                    ts.getProperty(typeofNEFacts, right.text) || 8192;
-                return getTypeWithFacts(type, facts);
-            }
-            function narrowTypeByInstanceof(type, expr, assumeTrue) {
-                if (!isMatchingReference(reference, expr.left)) {
-                    if (containsMatchingReference(reference, expr.left)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                if (isTypeAny(type)) {
-                    return type;
-                }
-                var rightType = checkExpression(expr.right);
-                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
-                    return type;
-                }
-                var targetType;
-                var prototypeProperty = getPropertyOfType(rightType, "prototype");
-                if (prototypeProperty) {
-                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
-                    if (!isTypeAny(prototypePropertyType)) {
-                        targetType = prototypePropertyType;
-                    }
-                }
-                if (!targetType) {
-                    var constructSignatures = void 0;
-                    if (rightType.flags & 2048) {
-                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
-                    }
-                    else if (rightType.flags & 65536) {
-                        constructSignatures = getSignaturesOfType(rightType, 1);
-                    }
-                    if (constructSignatures && constructSignatures.length) {
-                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
-                    }
-                }
-                if (targetType) {
-                    return getNarrowedType(type, targetType, assumeTrue);
-                }
-                return type;
-            }
-            function getNarrowedType(type, candidate, assumeTrue) {
-                if (!assumeTrue) {
-                    return type.flags & 16384 ?
-                        getUnionType(ts.filter(type.types, function (t) { return !isTypeSubtypeOf(t, candidate); })) :
-                        type;
-                }
-                if (type.flags & 16384) {
-                    var assignableConstituents = ts.filter(type.types, function (t) { return isTypeAssignableTo(t, candidate); });
-                    if (assignableConstituents.length) {
-                        return getUnionType(assignableConstituents);
-                    }
-                }
-                var targetType = type.flags & 512 ? getApparentType(type) : type;
-                return isTypeAssignableTo(candidate, targetType) ? candidate :
-                    isTypeAssignableTo(type, candidate) ? type :
-                        neverType;
-            }
-            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
-                if (type.flags & 1 || !hasMatchingArgument(callExpression, reference)) {
-                    return type;
-                }
-                var signature = getResolvedSignature(callExpression);
-                var predicate = signature.typePredicate;
-                if (!predicate) {
-                    return type;
-                }
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    var predicateArgument = callExpression.arguments[predicate.parameterIndex];
-                    if (predicateArgument) {
-                        if (isMatchingReference(reference, predicateArgument)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, predicateArgument)) {
-                            return declaredType;
-                        }
-                    }
-                }
-                else {
-                    var invokedExpression = skipParenthesizedNodes(callExpression.expression);
-                    if (invokedExpression.kind === 173 || invokedExpression.kind === 172) {
-                        var accessExpression = invokedExpression;
-                        var possibleReference = skipParenthesizedNodes(accessExpression.expression);
-                        if (isMatchingReference(reference, possibleReference)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, possibleReference)) {
-                            return declaredType;
-                        }
-                    }
-                }
-                return type;
-            }
-            function narrowType(type, expr, assumeTrue) {
-                switch (expr.kind) {
-                    case 69:
-                    case 97:
-                    case 172:
-                        return narrowTypeByTruthiness(type, expr, assumeTrue);
-                    case 174:
-                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
-                    case 178:
-                        return narrowType(type, expr.expression, assumeTrue);
-                    case 187:
-                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
-                    case 185:
-                        if (expr.operator === 49) {
-                            return narrowType(type, expr.operand, !assumeTrue);
-                        }
-                        break;
-                }
-                return type;
-            }
-        }
-        function getTypeOfSymbolAtLocation(symbol, location) {
-            if (location.kind === 69) {
-                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
-                    location = location.parent;
-                }
-                if (ts.isExpression(location) && !ts.isAssignmentTarget(location)) {
-                    var type = checkExpression(location);
-                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
-                        return type;
-                    }
-                }
-            }
-            return getTypeOfSymbol(symbol);
-        }
-        function skipParenthesizedNodes(expression) {
-            while (expression.kind === 178) {
-                expression = expression.expression;
-            }
-            return expression;
-        }
-        function checkIdentifier(node) {
-            var symbol = getResolvedSymbol(node);
-            if (symbol === argumentsSymbol) {
-                var container = ts.getContainingFunction(node);
-                if (container.kind === 180) {
-                    if (languageVersion < 2) {
-                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
-                    }
-                }
-                if (node.flags & 33554432) {
-                    getNodeLinks(container).flags |= 8192;
-                }
-            }
-            if (symbol.flags & 8388608 && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
-                markAliasSymbolAsReferenced(symbol);
-            }
-            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
-            if (languageVersion === 2
-                && localOrExportSymbol.flags & 32
-                && localOrExportSymbol.valueDeclaration.kind === 221
-                && ts.nodeIsDecorated(localOrExportSymbol.valueDeclaration)) {
-                var container = ts.getContainingClass(node);
-                while (container !== undefined) {
-                    if (container === localOrExportSymbol.valueDeclaration && container.name !== node) {
-                        getNodeLinks(container).flags |= 524288;
-                        getNodeLinks(node).flags |= 1048576;
-                        break;
-                    }
-                    container = ts.getContainingClass(container);
-                }
-            }
-            checkCollisionWithCapturedSuperVariable(node, node);
-            checkCollisionWithCapturedThisVariable(node, node);
-            checkNestedBlockScopedBinding(node, symbol);
-            var type = getTypeOfSymbol(localOrExportSymbol);
-            if (!(localOrExportSymbol.flags & 3) || ts.isAssignmentTarget(node)) {
-                return type;
-            }
-            var declaration = localOrExportSymbol.valueDeclaration;
-            var assumeInitialized = !strictNullChecks || (type.flags & 1) !== 0 || !declaration ||
-                ts.getRootDeclaration(declaration).kind === 142 || ts.isInAmbientContext(declaration) ||
-                ts.getContainingFunctionOrModule(declaration) !== ts.getContainingFunctionOrModule(node);
-            var flowType = getFlowTypeOfReference(node, type, assumeInitialized);
-            if (!assumeInitialized && !(getNullableKind(type) & 32) && getNullableKind(flowType) & 32) {
-                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
-                return type;
-            }
-            return flowType;
-        }
-        function isInsideFunction(node, threshold) {
-            var current = node;
-            while (current && current !== threshold) {
-                if (ts.isFunctionLike(current)) {
-                    return true;
-                }
-                current = current.parent;
-            }
-            return false;
-        }
-        function checkNestedBlockScopedBinding(node, symbol) {
-            if (languageVersion >= 2 ||
-                (symbol.flags & (2 | 32)) === 0 ||
-                symbol.valueDeclaration.parent.kind === 252) {
-                return;
-            }
-            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-            var usedInFunction = isInsideFunction(node.parent, container);
-            var current = container;
-            var containedInIterationStatement = false;
-            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
-                if (ts.isIterationStatement(current, false)) {
-                    containedInIterationStatement = true;
-                    break;
-                }
-                current = current.parent;
-            }
-            if (containedInIterationStatement) {
-                if (usedInFunction) {
-                    getNodeLinks(current).flags |= 65536;
-                }
-                if (container.kind === 206 &&
-                    ts.getAncestor(symbol.valueDeclaration, 219).parent === container &&
-                    isAssignedInBodyOfForStatement(node, container)) {
-                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152;
-                }
-                getNodeLinks(symbol.valueDeclaration).flags |= 262144;
-            }
-            if (usedInFunction) {
-                getNodeLinks(symbol.valueDeclaration).flags |= 131072;
-            }
-        }
-        function isAssignedInBodyOfForStatement(node, container) {
-            var current = node;
-            while (current.parent.kind === 178) {
-                current = current.parent;
-            }
-            var isAssigned = false;
-            if (ts.isAssignmentTarget(current)) {
-                isAssigned = true;
-            }
-            else if ((current.parent.kind === 185 || current.parent.kind === 186)) {
-                var expr = current.parent;
-                isAssigned = expr.operator === 41 || expr.operator === 42;
-            }
-            if (!isAssigned) {
-                return false;
-            }
-            while (current !== container) {
-                if (current === container.statement) {
-                    return true;
-                }
-                else {
-                    current = current.parent;
-                }
-            }
-            return false;
-        }
-        function captureLexicalThis(node, container) {
-            getNodeLinks(node).flags |= 2;
-            if (container.kind === 145 || container.kind === 148) {
-                var classNode = container.parent;
-                getNodeLinks(classNode).flags |= 4;
-            }
-            else {
-                getNodeLinks(container).flags |= 4;
-            }
-        }
-        function findFirstSuperCall(n) {
-            if (ts.isSuperCallExpression(n)) {
-                return n;
-            }
-            else if (ts.isFunctionLike(n)) {
-                return undefined;
-            }
-            return ts.forEachChild(n, findFirstSuperCall);
-        }
-        function getSuperCallInConstructor(constructor) {
-            var links = getNodeLinks(constructor);
-            if (links.hasSuperCall === undefined) {
-                links.superCall = findFirstSuperCall(constructor.body);
-                links.hasSuperCall = links.superCall ? true : false;
-            }
-            return links.superCall;
-        }
-        function classDeclarationExtendsNull(classDecl) {
-            var classSymbol = getSymbolOfNode(classDecl);
-            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
-            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
-            return baseConstructorType === nullType;
-        }
-        function checkThisExpression(node) {
-            var container = ts.getThisContainer(node, true);
-            var needToCaptureLexicalThis = false;
-            if (container.kind === 148) {
-                var containingClassDecl = container.parent;
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
-                if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
-                    var superCall = getSuperCallInConstructor(container);
-                    if (!superCall || superCall.end > node.pos) {
-                        error(node, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
-                    }
-                }
-            }
-            if (container.kind === 180) {
-                container = ts.getThisContainer(container, false);
-                needToCaptureLexicalThis = (languageVersion < 2);
-            }
-            switch (container.kind) {
-                case 225:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
-                    break;
-                case 224:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
-                    break;
-                case 148:
-                    if (isInConstructorArgumentInitializer(node, container)) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
-                    }
-                    break;
-                case 145:
-                case 144:
-                    if (container.flags & 32) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
-                    }
-                    break;
-                case 140:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
-                    break;
-            }
-            if (needToCaptureLexicalThis) {
-                captureLexicalThis(node, container);
-            }
-            if (ts.isFunctionLike(container)) {
-                if (container.kind === 179 &&
-                    ts.isInJavaScriptFile(container.parent) &&
-                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3) {
-                    var className = container.parent
-                        .left
-                        .expression
-                        .expression;
-                    var classSymbol = checkExpression(className).symbol;
-                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16)) {
-                        return getInferredClassType(classSymbol);
-                    }
-                }
-                var type = getContextuallyTypedThisType(container);
-                if (type) {
-                    return type;
-                }
-                var signature = getSignatureFromDeclaration(container);
-                if (signature.thisType) {
-                    return signature.thisType;
-                }
-            }
-            if (ts.isClassLike(container.parent)) {
-                var symbol = getSymbolOfNode(container.parent);
-                var type = container.flags & 32 ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
-                return getFlowTypeOfReference(node, type, true);
-            }
-            if (ts.isInJavaScriptFile(node)) {
-                var type = getTypeForThisExpressionFromJSDoc(container);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            if (compilerOptions.noImplicitThis) {
-                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
-            }
-            return anyType;
-        }
-        function getTypeForThisExpressionFromJSDoc(node) {
-            var typeTag = ts.getJSDocTypeTag(node);
-            if (typeTag && typeTag.typeExpression && typeTag.typeExpression.type && typeTag.typeExpression.type.kind === 269) {
-                var jsDocFunctionType = typeTag.typeExpression.type;
-                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 272) {
-                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
-                }
-            }
-        }
-        function isInConstructorArgumentInitializer(node, constructorDecl) {
-            for (var n = node; n && n !== constructorDecl; n = n.parent) {
-                if (n.kind === 142) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function checkSuperExpression(node) {
-            var isCallExpression = node.parent.kind === 174 && node.parent.expression === node;
-            var container = ts.getSuperContainer(node, true);
-            var needToCaptureLexicalThis = false;
-            if (!isCallExpression) {
-                while (container && container.kind === 180) {
-                    container = ts.getSuperContainer(container, true);
-                    needToCaptureLexicalThis = languageVersion < 2;
-                }
-            }
-            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
-            var nodeCheckFlag = 0;
-            if (!canUseSuperExpression) {
-                var current = node;
-                while (current && current !== container && current.kind !== 140) {
-                    current = current.parent;
-                }
-                if (current && current.kind === 140) {
-                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
-                }
-                else if (isCallExpression) {
-                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
-                }
-                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 171)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
-                }
-                else {
-                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
-                }
-                return unknownType;
-            }
-            if ((container.flags & 32) || isCallExpression) {
-                nodeCheckFlag = 512;
-            }
-            else {
-                nodeCheckFlag = 256;
-            }
-            getNodeLinks(node).flags |= nodeCheckFlag;
-            if (container.kind === 147 && container.flags & 256) {
-                if (ts.isSuperPropertyOrElementAccess(node.parent) && ts.isAssignmentTarget(node.parent)) {
-                    getNodeLinks(container).flags |= 4096;
-                }
-                else {
-                    getNodeLinks(container).flags |= 2048;
-                }
-            }
-            if (needToCaptureLexicalThis) {
-                captureLexicalThis(node.parent, container);
-            }
-            if (container.parent.kind === 171) {
-                if (languageVersion < 2) {
-                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
-                    return unknownType;
-                }
-                else {
-                    return anyType;
-                }
-            }
-            var classLikeDeclaration = container.parent;
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
-            var baseClassType = classType && getBaseTypes(classType)[0];
-            if (!baseClassType) {
-                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
-                }
-                return unknownType;
-            }
-            if (container.kind === 148 && isInConstructorArgumentInitializer(node, container)) {
-                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
-                return unknownType;
-            }
-            return nodeCheckFlag === 512
-                ? getBaseConstructorTypeOfClass(classType)
-                : getTypeWithThisArgument(baseClassType, classType.thisType);
-            function isLegalUsageOfSuperExpression(container) {
-                if (!container) {
-                    return false;
-                }
-                if (isCallExpression) {
-                    return container.kind === 148;
-                }
-                else {
-                    if (ts.isClassLike(container.parent) || container.parent.kind === 171) {
-                        if (container.flags & 32) {
-                            return container.kind === 147 ||
-                                container.kind === 146 ||
-                                container.kind === 149 ||
-                                container.kind === 150;
-                        }
-                        else {
-                            return container.kind === 147 ||
-                                container.kind === 146 ||
-                                container.kind === 149 ||
-                                container.kind === 150 ||
-                                container.kind === 145 ||
-                                container.kind === 144 ||
-                                container.kind === 148;
-                        }
-                    }
-                }
-                return false;
-            }
-        }
-        function getContextuallyTypedThisType(func) {
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func) && func.kind !== 180) {
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    return contextualSignature.thisType;
-                }
-            }
-            return undefined;
-        }
-        function getContextuallyTypedParameterType(parameter) {
-            var func = parameter.parent;
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
-                var iife = getImmediatelyInvokedFunctionExpression(func);
-                if (iife) {
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
-                        if (parameter.dotDotDotToken) {
-                            var restTypes = [];
-                            for (var i = indexOfParameter; i < iife.arguments.length; i++) {
-                                restTypes.push(getTypeOfExpression(iife.arguments[i]));
-                            }
-                            return createArrayType(getUnionType(restTypes));
-                        }
-                        var links = getNodeLinks(iife);
-                        var cached = links.resolvedSignature;
-                        links.resolvedSignature = anySignature;
-                        var type = checkExpression(iife.arguments[indexOfParameter]);
-                        links.resolvedSignature = cached;
-                        return type;
-                    }
-                }
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    var funcHasRestParameters = ts.hasRestParameter(func);
-                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (indexOfParameter < len) {
-                        return getTypeAtPosition(contextualSignature, indexOfParameter);
-                    }
-                    if (funcHasRestParameters &&
-                        indexOfParameter === (func.parameters.length - 1) &&
-                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
-                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
-                    }
-                }
-            }
-            return undefined;
-        }
-        function getImmediatelyInvokedFunctionExpression(func) {
-            if (isFunctionExpressionOrArrowFunction(func)) {
-                var prev = func;
-                var parent_8 = func.parent;
-                while (parent_8.kind === 178) {
-                    prev = parent_8;
-                    parent_8 = parent_8.parent;
-                }
-                if (parent_8.kind === 174 && parent_8.expression === prev) {
-                    return parent_8;
-                }
-            }
-        }
-        function getContextualTypeForInitializerExpression(node) {
-            var declaration = node.parent;
-            if (node === declaration.initializer) {
-                if (declaration.type) {
-                    return getTypeFromTypeNode(declaration.type);
-                }
-                if (declaration.kind === 142) {
-                    var type = getContextuallyTypedParameterType(declaration);
-                    if (type) {
-                        return type;
-                    }
-                }
-                if (ts.isBindingPattern(declaration.name)) {
-                    return getTypeFromBindingPattern(declaration.name, true);
-                }
-                if (ts.isBindingPattern(declaration.parent)) {
-                    var parentDeclaration = declaration.parent.parent;
-                    var name_11 = declaration.propertyName || declaration.name;
-                    if (ts.isVariableLike(parentDeclaration) &&
-                        parentDeclaration.type &&
-                        !ts.isBindingPattern(name_11)) {
-                        var text = getTextOfPropertyName(name_11);
-                        if (text) {
-                            return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text);
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function getContextualTypeForReturnExpression(node) {
-            var func = ts.getContainingFunction(node);
-            if (func && !func.asteriskToken) {
-                return getContextualReturnType(func);
-            }
-            return undefined;
-        }
-        function getContextualTypeForYieldOperand(node) {
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var contextualReturnType = getContextualReturnType(func);
-                if (contextualReturnType) {
-                    return node.asteriskToken
-                        ? contextualReturnType
-                        : getElementTypeOfIterableIterator(contextualReturnType);
-                }
-            }
-            return undefined;
-        }
-        function isInParameterInitializerBeforeContainingFunction(node) {
-            while (node.parent && !ts.isFunctionLike(node.parent)) {
-                if (node.parent.kind === 142 && node.parent.initializer === node) {
-                    return true;
-                }
-                node = node.parent;
-            }
-            return false;
-        }
-        function getContextualReturnType(functionDecl) {
-            if (functionDecl.type ||
-                functionDecl.kind === 148 ||
-                functionDecl.kind === 149 && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(functionDecl.symbol, 150))) {
-                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
-            }
-            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
-            if (signature) {
-                return getReturnTypeOfSignature(signature);
-            }
-            return undefined;
-        }
-        function getContextualTypeForArgument(callTarget, arg) {
-            var args = getEffectiveCallArguments(callTarget);
-            var argIndex = ts.indexOf(args, arg);
-            if (argIndex >= 0) {
-                var signature = getResolvedOrAnySignature(callTarget);
-                return getTypeAtPosition(signature, argIndex);
-            }
-            return undefined;
-        }
-        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
-            if (template.parent.kind === 176) {
-                return getContextualTypeForArgument(template.parent, substitutionExpression);
-            }
-            return undefined;
-        }
-        function getContextualTypeForBinaryOperand(node) {
-            var binaryExpression = node.parent;
-            var operator = binaryExpression.operatorToken.kind;
-            if (operator >= 56 && operator <= 68) {
-                if (node === binaryExpression.right) {
-                    return checkExpression(binaryExpression.left);
-                }
-            }
-            else if (operator === 52) {
-                var type = getContextualType(binaryExpression);
-                if (!type && node === binaryExpression.right) {
-                    type = checkExpression(binaryExpression.left);
-                }
-                return type;
-            }
-            else if (operator === 51 || operator === 24) {
-                if (node === binaryExpression.right) {
-                    return getContextualType(binaryExpression);
-                }
-            }
-            return undefined;
-        }
-        function applyToContextualType(type, mapper) {
-            if (!(type.flags & 16384)) {
-                return mapper(type);
-            }
-            var types = type.types;
-            var mappedType;
-            var mappedTypes;
-            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
-                var current = types_8[_i];
-                var t = mapper(current);
-                if (t) {
-                    if (!mappedType) {
-                        mappedType = t;
-                    }
-                    else if (!mappedTypes) {
-                        mappedTypes = [mappedType, t];
-                    }
-                    else {
-                        mappedTypes.push(t);
-                    }
-                }
-            }
-            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
-        }
-        function getTypeOfPropertyOfContextualType(type, name) {
-            return applyToContextualType(type, function (t) {
-                var prop = t.flags & 130048 ? getPropertyOfType(t, name) : undefined;
-                return prop ? getTypeOfSymbol(prop) : undefined;
-            });
-        }
-        function getIndexTypeOfContextualType(type, kind) {
-            return applyToContextualType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
-        }
-        function contextualTypeIsStringLiteralType(type) {
-            return !!(type.flags & 16384 ? ts.forEach(type.types, isStringLiteralType) : isStringLiteralType(type));
-        }
-        function contextualTypeIsTupleLikeType(type) {
-            return !!(type.flags & 16384 ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
-        }
-        function getContextualTypeForObjectLiteralMethod(node) {
-            ts.Debug.assert(ts.isObjectLiteralMethod(node));
-            if (isInsideWithStatementBody(node)) {
-                return undefined;
-            }
-            return getContextualTypeForObjectLiteralElement(node);
-        }
-        function getContextualTypeForObjectLiteralElement(element) {
-            var objectLiteral = element.parent;
-            var type = getApparentTypeOfContextualType(objectLiteral);
-            if (type) {
-                if (!ts.hasDynamicName(element)) {
-                    var symbolName = getSymbolOfNode(element).name;
-                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
-                    if (propertyType) {
-                        return propertyType;
-                    }
-                }
-                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1) ||
-                    getIndexTypeOfContextualType(type, 0);
-            }
-            return undefined;
-        }
-        function getContextualTypeForElementExpression(node) {
-            var arrayLiteral = node.parent;
-            var type = getApparentTypeOfContextualType(arrayLiteral);
-            if (type) {
-                var index = ts.indexOf(arrayLiteral.elements, node);
-                return getTypeOfPropertyOfContextualType(type, "" + index)
-                    || getIndexTypeOfContextualType(type, 1)
-                    || (languageVersion >= 2 ? getElementTypeOfIterable(type, undefined) : undefined);
-            }
-            return undefined;
-        }
-        function getContextualTypeForConditionalOperand(node) {
-            var conditional = node.parent;
-            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
-        }
-        function getContextualTypeForJsxAttribute(attribute) {
-            var kind = attribute.kind;
-            var jsxElement = attribute.parent;
-            var attrsType = getJsxElementAttributesType(jsxElement);
-            if (attribute.kind === 246) {
-                if (!attrsType || isTypeAny(attrsType)) {
-                    return undefined;
-                }
-                return getTypeOfPropertyOfType(attrsType, attribute.name.text);
-            }
-            else if (attribute.kind === 247) {
-                return attrsType;
-            }
-            ts.Debug.fail("Expected JsxAttribute or JsxSpreadAttribute, got ts.SyntaxKind[" + kind + "]");
-        }
-        function getApparentTypeOfContextualType(node) {
-            var type = getContextualType(node);
-            return type && getApparentType(type);
-        }
-        function getContextualType(node) {
-            if (isInsideWithStatementBody(node)) {
-                return undefined;
-            }
-            if (node.contextualType) {
-                return node.contextualType;
-            }
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 218:
-                case 142:
-                case 145:
-                case 144:
-                case 169:
-                    return getContextualTypeForInitializerExpression(node);
-                case 180:
-                case 211:
-                    return getContextualTypeForReturnExpression(node);
-                case 190:
-                    return getContextualTypeForYieldOperand(parent);
-                case 174:
-                case 175:
-                    return getContextualTypeForArgument(parent, node);
-                case 177:
-                case 195:
-                    return getTypeFromTypeNode(parent.type);
-                case 187:
-                    return getContextualTypeForBinaryOperand(node);
-                case 253:
-                    return getContextualTypeForObjectLiteralElement(parent);
-                case 170:
-                    return getContextualTypeForElementExpression(node);
-                case 188:
-                    return getContextualTypeForConditionalOperand(node);
-                case 197:
-                    ts.Debug.assert(parent.parent.kind === 189);
-                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
-                case 178:
-                    return getContextualType(parent);
-                case 248:
-                    return getContextualType(parent);
-                case 246:
-                case 247:
-                    return getContextualTypeForJsxAttribute(parent);
-            }
-            return undefined;
-        }
-        function getNonGenericSignature(type) {
-            var signatures = getSignaturesOfStructuredType(type, 0);
-            if (signatures.length === 1) {
-                var signature = signatures[0];
-                if (!signature.typeParameters) {
-                    return signature;
-                }
-            }
-        }
-        function isFunctionExpressionOrArrowFunction(node) {
-            return node.kind === 179 || node.kind === 180;
-        }
-        function getContextualSignatureForFunctionLikeDeclaration(node) {
-            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
-                ? getContextualSignature(node)
-                : undefined;
-        }
-        function getContextualTypeForFunctionLikeDeclaration(node) {
-            return ts.isObjectLiteralMethod(node) ?
-                getContextualTypeForObjectLiteralMethod(node) :
-                getApparentTypeOfContextualType(node);
-        }
-        function getContextualSignature(node) {
-            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
-            var type = getContextualTypeForFunctionLikeDeclaration(node);
-            if (!type) {
-                return undefined;
-            }
-            if (!(type.flags & 16384)) {
-                return getNonGenericSignature(type);
-            }
-            var signatureList;
-            var types = type.types;
-            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
-                var current = types_9[_i];
-                var signature = getNonGenericSignature(current);
-                if (signature) {
-                    if (!signatureList) {
-                        signatureList = [signature];
-                    }
-                    else if (!compareSignaturesIdentical(signatureList[0], signature, false, true, true, compareTypesIdentical)) {
-                        return undefined;
-                    }
-                    else {
-                        signatureList.push(signature);
-                    }
-                }
-            }
-            var result;
-            if (signatureList) {
-                result = cloneSignature(signatureList[0]);
-                result.resolvedReturnType = undefined;
-                result.unionSignatures = signatureList;
-            }
-            return result;
-        }
-        function isInferentialContext(mapper) {
-            return mapper && mapper.context;
-        }
-        function checkSpreadElementExpression(node, contextualMapper) {
-            var arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
-            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, false);
-        }
-        function hasDefaultValue(node) {
-            return (node.kind === 169 && !!node.initializer) ||
-                (node.kind === 187 && node.operatorToken.kind === 56);
-        }
-        function checkArrayLiteral(node, contextualMapper) {
-            var elements = node.elements;
-            var hasSpreadElement = false;
-            var elementTypes = [];
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
-            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
-                var e = elements_1[_i];
-                if (inDestructuringPattern && e.kind === 191) {
-                    var restArrayType = checkExpression(e.expression, contextualMapper);
-                    var restElementType = getIndexTypeOfType(restArrayType, 1) ||
-                        (languageVersion >= 2 ? getElementTypeOfIterable(restArrayType, undefined) : undefined);
-                    if (restElementType) {
-                        elementTypes.push(restElementType);
-                    }
-                }
-                else {
-                    var type = checkExpression(e, contextualMapper);
-                    elementTypes.push(type);
-                }
-                hasSpreadElement = hasSpreadElement || e.kind === 191;
-            }
-            if (!hasSpreadElement) {
-                if (inDestructuringPattern && elementTypes.length) {
-                    var type = createNewTupleType(elementTypes);
-                    type.pattern = node;
-                    return type;
-                }
-                var contextualType = getApparentTypeOfContextualType(node);
-                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
-                    var pattern = contextualType.pattern;
-                    if (pattern && (pattern.kind === 168 || pattern.kind === 170)) {
-                        var patternElements = pattern.elements;
-                        for (var i = elementTypes.length; i < patternElements.length; i++) {
-                            var patternElement = patternElements[i];
-                            if (hasDefaultValue(patternElement)) {
-                                elementTypes.push(contextualType.elementTypes[i]);
-                            }
-                            else {
-                                if (patternElement.kind !== 193) {
-                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
-                                }
-                                elementTypes.push(unknownType);
-                            }
-                        }
-                    }
-                    if (elementTypes.length) {
-                        return createTupleType(elementTypes);
-                    }
-                }
-            }
-            return createArrayType(elementTypes.length ? getUnionType(elementTypes) : emptyArrayElementType);
-        }
-        function isNumericName(name) {
-            return name.kind === 140 ? isNumericComputedName(name) : isNumericLiteralName(name.text);
-        }
-        function isNumericComputedName(name) {
-            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 132);
-        }
-        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
-            return isTypeAny(type) || isTypeOfKind(type, kind);
-        }
-        function isNumericLiteralName(name) {
-            return (+name).toString() === name;
-        }
-        function checkComputedPropertyName(node) {
-            var links = getNodeLinks(node.expression);
-            if (!links.resolvedType) {
-                links.resolvedType = checkExpression(node.expression);
-                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 132 | 258 | 16777216)) {
-                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
-                }
-                else {
-                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, true);
-                }
-            }
-            return links.resolvedType;
-        }
-        function getObjectLiteralIndexInfo(node, properties, kind) {
-            var propTypes = [];
-            for (var i = 0; i < properties.length; i++) {
-                if (kind === 0 || isNumericName(node.properties[i].name)) {
-                    propTypes.push(getTypeOfSymbol(properties[i]));
-                }
-            }
-            var unionType = propTypes.length ? getUnionType(propTypes) : undefinedType;
-            return createIndexInfo(unionType, false);
-        }
-        function checkObjectLiteral(node, contextualMapper) {
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
-            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
-            var propertiesTable = {};
-            var propertiesArray = [];
-            var contextualType = getApparentTypeOfContextualType(node);
-            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
-                (contextualType.pattern.kind === 167 || contextualType.pattern.kind === 171);
-            var typeFlags = 0;
-            var patternWithComputedProperties = false;
-            var hasComputedStringProperty = false;
-            var hasComputedNumberProperty = false;
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var memberDecl = _a[_i];
-                var member = memberDecl.symbol;
-                if (memberDecl.kind === 253 ||
-                    memberDecl.kind === 254 ||
-                    ts.isObjectLiteralMethod(memberDecl)) {
-                    var type = void 0;
-                    if (memberDecl.kind === 253) {
-                        type = checkPropertyAssignment(memberDecl, contextualMapper);
-                    }
-                    else if (memberDecl.kind === 147) {
-                        type = checkObjectLiteralMethod(memberDecl, contextualMapper);
-                    }
-                    else {
-                        ts.Debug.assert(memberDecl.kind === 254);
-                        type = checkExpression(memberDecl.name, contextualMapper);
-                    }
-                    typeFlags |= type.flags;
-                    var prop = createSymbol(4 | 67108864 | member.flags, member.name);
-                    if (inDestructuringPattern) {
-                        var isOptional = (memberDecl.kind === 253 && hasDefaultValue(memberDecl.initializer)) ||
-                            (memberDecl.kind === 254 && memberDecl.objectAssignmentInitializer);
-                        if (isOptional) {
-                            prop.flags |= 536870912;
-                        }
-                        if (ts.hasDynamicName(memberDecl)) {
-                            patternWithComputedProperties = true;
-                        }
-                    }
-                    else if (contextualTypeHasPattern && !(contextualType.flags & 67108864)) {
-                        var impliedProp = getPropertyOfType(contextualType, member.name);
-                        if (impliedProp) {
-                            prop.flags |= impliedProp.flags & 536870912;
-                        }
-                        else if (!compilerOptions.suppressExcessPropertyErrors) {
-                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
-                        }
-                    }
-                    prop.declarations = member.declarations;
-                    prop.parent = member.parent;
-                    if (member.valueDeclaration) {
-                        prop.valueDeclaration = member.valueDeclaration;
-                    }
-                    prop.type = type;
-                    prop.target = member;
-                    member = prop;
-                }
-                else {
-                    ts.Debug.assert(memberDecl.kind === 149 || memberDecl.kind === 150);
-                    checkAccessorDeclaration(memberDecl);
-                }
-                if (ts.hasDynamicName(memberDecl)) {
-                    if (isNumericName(memberDecl.name)) {
-                        hasComputedNumberProperty = true;
-                    }
-                    else {
-                        hasComputedStringProperty = true;
-                    }
-                }
-                else {
-                    propertiesTable[member.name] = member;
-                }
-                propertiesArray.push(member);
-            }
-            if (contextualTypeHasPattern) {
-                for (var _b = 0, _c = getPropertiesOfType(contextualType); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    if (!ts.hasProperty(propertiesTable, prop.name)) {
-                        if (!(prop.flags & 536870912)) {
-                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
-                        }
-                        propertiesTable[prop.name] = prop;
-                        propertiesArray.push(prop);
-                    }
-                }
-            }
-            var stringIndexInfo = hasComputedStringProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 0) : undefined;
-            var numberIndexInfo = hasComputedNumberProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 1) : undefined;
-            var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
-            var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576;
-            result.flags |= 524288 | 4194304 | freshObjectLiteralFlag | (typeFlags & 14680064) | (patternWithComputedProperties ? 67108864 : 0);
-            if (inDestructuringPattern) {
-                result.pattern = node;
-            }
-            return result;
-        }
-        function checkJsxSelfClosingElement(node) {
-            checkJsxOpeningLikeElement(node);
-            return jsxElementType || anyType;
-        }
-        function checkJsxElement(node) {
-            checkJsxOpeningLikeElement(node.openingElement);
-            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
-                getIntrinsicTagSymbol(node.closingElement);
-            }
-            else {
-                checkExpression(node.closingElement.tagName);
-            }
-            for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
-                var child = _a[_i];
-                switch (child.kind) {
-                    case 248:
-                        checkJsxExpression(child);
-                        break;
-                    case 241:
-                        checkJsxElement(child);
-                        break;
-                    case 242:
-                        checkJsxSelfClosingElement(child);
-                        break;
-                }
-            }
-            return jsxElementType || anyType;
-        }
-        function isUnhyphenatedJsxName(name) {
-            return name.indexOf("-") < 0;
-        }
-        function isJsxIntrinsicIdentifier(tagName) {
-            if (tagName.kind === 139) {
-                return false;
-            }
-            else {
-                return ts.isIntrinsicJsxName(tagName.text);
-            }
-        }
-        function checkJsxAttribute(node, elementAttributesType, nameTable) {
-            var correspondingPropType = undefined;
-            if (elementAttributesType === emptyObjectType && isUnhyphenatedJsxName(node.name.text)) {
-                error(node.parent, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
-            }
-            else if (elementAttributesType && !isTypeAny(elementAttributesType)) {
-                var correspondingPropSymbol = getPropertyOfType(elementAttributesType, node.name.text);
-                correspondingPropType = correspondingPropSymbol && getTypeOfSymbol(correspondingPropSymbol);
-                if (isUnhyphenatedJsxName(node.name.text)) {
-                    var indexerType = getIndexTypeOfType(elementAttributesType, 0);
-                    if (indexerType) {
-                        correspondingPropType = indexerType;
-                    }
-                    else {
-                        if (!correspondingPropType) {
-                            error(node.name, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.name.text, typeToString(elementAttributesType));
-                            return unknownType;
-                        }
-                    }
-                }
-            }
-            var exprType;
-            if (node.initializer) {
-                exprType = checkExpression(node.initializer);
-            }
-            else {
-                exprType = booleanType;
-            }
-            if (correspondingPropType) {
-                checkTypeAssignableTo(exprType, correspondingPropType, node);
-            }
-            nameTable[node.name.text] = true;
-            return exprType;
-        }
-        function checkJsxSpreadAttribute(node, elementAttributesType, nameTable) {
-            var type = checkExpression(node.expression);
-            var props = getPropertiesOfType(type);
-            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
-                var prop = props_2[_i];
-                if (!nameTable[prop.name]) {
-                    var targetPropSym = getPropertyOfType(elementAttributesType, prop.name);
-                    if (targetPropSym) {
-                        var msg = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property, prop.name);
-                        checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(targetPropSym), node, undefined, msg);
-                    }
-                    nameTable[prop.name] = true;
-                }
-            }
-            return type;
-        }
-        function getJsxType(name) {
-            if (jsxTypes[name] === undefined) {
-                return jsxTypes[name] = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType;
-            }
-            return jsxTypes[name];
-        }
-        function getIntrinsicTagSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
-                if (intrinsicElementsType !== unknownType) {
-                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
-                    if (intrinsicProp) {
-                        links.jsxFlags |= 1;
-                        return links.resolvedSymbol = intrinsicProp;
-                    }
-                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0);
-                    if (indexSignatureType) {
-                        links.jsxFlags |= 2;
-                        return links.resolvedSymbol = intrinsicElementsType.symbol;
-                    }
-                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
-                    return links.resolvedSymbol = unknownSymbol;
-                }
-                else {
-                    if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
-                    }
-                    return links.resolvedSymbol = unknownSymbol;
-                }
-            }
-            return links.resolvedSymbol;
-        }
-        function getJsxElementInstanceType(node, valueType) {
-            ts.Debug.assert(!(valueType.flags & 16384));
-            if (isTypeAny(valueType)) {
-                return anyType;
-            }
-            var signatures = getSignaturesOfType(valueType, 1);
-            if (signatures.length === 0) {
-                signatures = getSignaturesOfType(valueType, 0);
-                if (signatures.length === 0) {
-                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
-                    return unknownType;
-                }
-            }
-            return getUnionType(signatures.map(getReturnTypeOfSignature));
-        }
-        function getJsxElementPropertiesName() {
-            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1536, undefined);
-            var attribsPropTypeSym = jsxNamespace && getSymbol(jsxNamespace.exports, JsxNames.ElementAttributesPropertyNameContainer, 793056);
-            var attribPropType = attribsPropTypeSym && getDeclaredTypeOfSymbol(attribsPropTypeSym);
-            var attribProperties = attribPropType && getPropertiesOfType(attribPropType);
-            if (attribProperties) {
-                if (attribProperties.length === 0) {
-                    return "";
-                }
-                else if (attribProperties.length === 1) {
-                    return attribProperties[0].name;
-                }
-                else {
-                    error(attribsPropTypeSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, JsxNames.ElementAttributesPropertyNameContainer);
-                    return undefined;
-                }
-            }
-            else {
-                return undefined;
-            }
-        }
-        function getResolvedJsxType(node, elemType, elemClassType) {
-            if (!elemType) {
-                elemType = checkExpression(node.tagName);
-            }
-            if (elemType.flags & 16384) {
-                var types = elemType.types;
-                return getUnionType(types.map(function (type) {
-                    return getResolvedJsxType(node, type, elemClassType);
-                }));
-            }
-            var elemInstanceType = getJsxElementInstanceType(node, elemType);
-            if (!elemClassType || !isTypeAssignableTo(elemInstanceType, elemClassType)) {
-                if (jsxElementType) {
-                    var callSignatures = elemType && getSignaturesOfType(elemType, 0);
-                    var callSignature = callSignatures && callSignatures.length > 0 && callSignatures[0];
-                    var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
-                    var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
-                    if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType)) {
-                        var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
-                        if (intrinsicAttributes !== unknownType) {
-                            paramType = intersectTypes(intrinsicAttributes, paramType);
-                        }
-                        return paramType;
-                    }
-                }
-            }
-            if (elemClassType) {
-                checkTypeRelatedTo(elemInstanceType, elemClassType, assignableRelation, node, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
-            }
-            if (isTypeAny(elemInstanceType)) {
-                return elemInstanceType;
-            }
-            var propsName = getJsxElementPropertiesName();
-            if (propsName === undefined) {
-                return anyType;
-            }
-            else if (propsName === "") {
-                return elemInstanceType;
-            }
-            else {
-                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
-                if (!attributesType) {
-                    return emptyObjectType;
-                }
-                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
-                    return attributesType;
-                }
-                else if (attributesType.flags & 16384) {
-                    error(node.tagName, ts.Diagnostics.JSX_element_attributes_type_0_may_not_be_a_union_type, typeToString(attributesType));
-                    return anyType;
-                }
-                else {
-                    var apparentAttributesType = attributesType;
-                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
-                    if (intrinsicClassAttribs !== unknownType) {
-                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
-                        if (typeParams) {
-                            if (typeParams.length === 1) {
-                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
-                            }
-                        }
-                        else {
-                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
-                        }
-                    }
-                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
-                    if (intrinsicAttribs !== unknownType) {
-                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
-                    }
-                    return apparentAttributesType;
-                }
-            }
-        }
-        function getJsxElementAttributesType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedJsxType) {
-                if (isJsxIntrinsicIdentifier(node.tagName)) {
-                    var symbol = getIntrinsicTagSymbol(node);
-                    if (links.jsxFlags & 1) {
-                        return links.resolvedJsxType = getTypeOfSymbol(symbol);
-                    }
-                    else if (links.jsxFlags & 2) {
-                        return links.resolvedJsxType = getIndexInfoOfSymbol(symbol, 0).type;
-                    }
-                    else {
-                        return links.resolvedJsxType = unknownType;
-                    }
-                }
-                else {
-                    var elemClassType = getJsxGlobalElementClassType();
-                    return links.resolvedJsxType = getResolvedJsxType(node, undefined, elemClassType);
-                }
-            }
-            return links.resolvedJsxType;
-        }
-        function getJsxAttributePropertySymbol(attrib) {
-            var attributesType = getJsxElementAttributesType(attrib.parent);
-            var prop = getPropertyOfType(attributesType, attrib.name.text);
-            return prop || unknownSymbol;
-        }
-        function getJsxGlobalElementClassType() {
-            if (!jsxElementClassType) {
-                jsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
-            }
-            return jsxElementClassType;
-        }
-        function getJsxIntrinsicTagNames() {
-            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
-            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
-        }
-        function checkJsxPreconditions(errorNode) {
-            if ((compilerOptions.jsx || 0) === 0) {
-                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
-            }
-            if (jsxElementType === undefined) {
-                if (compilerOptions.noImplicitAny) {
-                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
-                }
-            }
-        }
-        function checkJsxOpeningLikeElement(node) {
-            checkGrammarJsxElement(node);
-            checkJsxPreconditions(node);
-            var reactRefErr = compilerOptions.jsx === 2 ? ts.Diagnostics.Cannot_find_name_0 : undefined;
-            var reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
-            var reactSym = resolveName(node.tagName, reactNamespace, 107455, reactRefErr, reactNamespace);
-            if (reactSym) {
-                getSymbolLinks(reactSym).referenced = true;
-            }
-            var targetAttributesType = getJsxElementAttributesType(node);
-            var nameTable = {};
-            var sawSpreadedAny = false;
-            for (var i = node.attributes.length - 1; i >= 0; i--) {
-                if (node.attributes[i].kind === 246) {
-                    checkJsxAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                }
-                else {
-                    ts.Debug.assert(node.attributes[i].kind === 247);
-                    var spreadType = checkJsxSpreadAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                    if (isTypeAny(spreadType)) {
-                        sawSpreadedAny = true;
-                    }
-                }
-            }
-            if (targetAttributesType && !sawSpreadedAny) {
-                var targetProperties = getPropertiesOfType(targetAttributesType);
-                for (var i = 0; i < targetProperties.length; i++) {
-                    if (!(targetProperties[i].flags & 536870912) &&
-                        nameTable[targetProperties[i].name] === undefined) {
-                        error(node, ts.Diagnostics.Property_0_is_missing_in_type_1, targetProperties[i].name, typeToString(targetAttributesType));
-                    }
-                }
-            }
-        }
-        function checkJsxExpression(node) {
-            if (node.expression) {
-                return checkExpression(node.expression);
-            }
-            else {
-                return unknownType;
-            }
-        }
-        function getDeclarationKindFromSymbol(s) {
-            return s.valueDeclaration ? s.valueDeclaration.kind : 145;
-        }
-        function getDeclarationFlagsFromSymbol(s) {
-            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : s.flags & 134217728 ? 4 | 32 : 0;
-        }
-        function checkClassPropertyAccess(node, left, type, prop) {
-            var flags = getDeclarationFlagsFromSymbol(prop);
-            var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop));
-            var errorNode = node.kind === 172 || node.kind === 218 ?
-                node.name :
-                node.right;
-            if (left.kind === 95) {
-                if (languageVersion < 2 && getDeclarationKindFromSymbol(prop) !== 147) {
-                    error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
-                    return false;
-                }
-                if (flags & 128) {
-                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-            }
-            if (!(flags & (8 | 16))) {
-                return true;
-            }
-            if (flags & 8) {
-                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
-                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-                return true;
-            }
-            if (left.kind === 95) {
-                return true;
-            }
-            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
-                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
-                return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined;
-            });
-            if (!enclosingClass) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass));
-                return false;
-            }
-            if (flags & 32) {
-                return true;
-            }
-            if (type.flags & 33554432) {
-                type = getConstraintOfTypeParameter(type);
-            }
-            if (!(getTargetType(type).flags & (1024 | 2048) && hasBaseType(type, enclosingClass))) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
-                return false;
-            }
-            return true;
-        }
-        function checkNonNullExpression(node) {
-            var type = checkExpression(node);
-            if (strictNullChecks) {
-                var kind = getNullableKind(type);
-                if (kind) {
-                    error(node, kind & 32 ? kind & 64 ?
-                        ts.Diagnostics.Object_is_possibly_null_or_undefined :
-                        ts.Diagnostics.Object_is_possibly_undefined :
-                        ts.Diagnostics.Object_is_possibly_null);
-                }
-                return getNonNullableType(type);
-            }
-            return type;
-        }
-        function checkPropertyAccessExpression(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
-        }
-        function checkQualifiedName(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
-        }
-        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
-            var type = checkNonNullExpression(left);
-            if (isTypeAny(type)) {
-                return type;
-            }
-            var apparentType = getApparentType(getWidenedType(type));
-            if (apparentType === unknownType) {
-                return unknownType;
-            }
-            var prop = getPropertyOfType(apparentType, right.text);
-            if (!prop) {
-                if (right.text) {
-                    error(right, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(right), typeToString(type.flags & 33554432 ? apparentType : type));
-                }
-                return unknownType;
-            }
-            getNodeLinks(node).resolvedSymbol = prop;
-            if (prop.parent && prop.parent.flags & 32) {
-                checkClassPropertyAccess(node, left, apparentType, prop);
-            }
-            var propType = getTypeOfSymbol(prop);
-            if (node.kind !== 172 || ts.isAssignmentTarget(node) ||
-                !(propType.flags & 16384) && !(prop.flags & (3 | 4 | 98304))) {
-                return propType;
-            }
-            var leftmostNode = getLeftmostIdentifierOrThis(node);
-            if (!leftmostNode) {
-                return propType;
-            }
-            if (leftmostNode.kind === 69) {
-                var leftmostSymbol = getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(leftmostNode));
-                if (!leftmostSymbol) {
-                    return propType;
-                }
-                var declaration = leftmostSymbol.valueDeclaration;
-                if (!declaration || declaration.kind !== 218 && declaration.kind !== 142 && declaration.kind !== 169) {
-                    return propType;
-                }
-            }
-            return getFlowTypeOfReference(node, propType, true);
-        }
-        function isValidPropertyAccess(node, propertyName) {
-            var left = node.kind === 172
-                ? node.expression
-                : node.left;
-            var type = checkExpression(left);
-            if (type !== unknownType && !isTypeAny(type)) {
-                var prop = getPropertyOfType(getWidenedType(type), propertyName);
-                if (prop && prop.parent && prop.parent.flags & 32) {
-                    return checkClassPropertyAccess(node, left, type, prop);
-                }
-            }
-            return true;
-        }
-        function getForInVariableSymbol(node) {
-            var initializer = node.initializer;
-            if (initializer.kind === 219) {
-                var variable = initializer.declarations[0];
-                if (variable && !ts.isBindingPattern(variable.name)) {
-                    return getSymbolOfNode(variable);
-                }
-            }
-            else if (initializer.kind === 69) {
-                return getResolvedSymbol(initializer);
-            }
-            return undefined;
-        }
-        function hasNumericPropertyNames(type) {
-            return getIndexTypeOfType(type, 1) && !getIndexTypeOfType(type, 0);
-        }
-        function isForInVariableForNumericPropertyNames(expr) {
-            var e = skipParenthesizedNodes(expr);
-            if (e.kind === 69) {
-                var symbol = getResolvedSymbol(e);
-                if (symbol.flags & 3) {
-                    var child = expr;
-                    var node = expr.parent;
-                    while (node) {
-                        if (node.kind === 207 &&
-                            child === node.statement &&
-                            getForInVariableSymbol(node) === symbol &&
-                            hasNumericPropertyNames(checkExpression(node.expression))) {
-                            return true;
-                        }
-                        child = node;
-                        node = node.parent;
-                    }
-                }
-            }
-            return false;
-        }
-        function checkIndexedAccess(node) {
-            if (!node.argumentExpression) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                if (node.parent.kind === 175 && node.parent.expression === node) {
-                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
-                }
-                else {
-                    var start = node.end - "]".length;
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
-                }
-            }
-            var objectType = getApparentType(checkNonNullExpression(node.expression));
-            var indexType = node.argumentExpression ? checkExpression(node.argumentExpression) : unknownType;
-            if (objectType === unknownType) {
-                return unknownType;
-            }
-            var isConstEnum = isConstEnumObjectType(objectType);
-            if (isConstEnum &&
-                (!node.argumentExpression || node.argumentExpression.kind !== 9)) {
-                error(node.argumentExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
-                return unknownType;
-            }
-            if (node.argumentExpression) {
-                var name_12 = getPropertyNameForIndexedAccess(node.argumentExpression, indexType);
-                if (name_12 !== undefined) {
-                    var prop = getPropertyOfType(objectType, name_12);
-                    if (prop) {
-                        getNodeLinks(node).resolvedSymbol = prop;
-                        return getTypeOfSymbol(prop);
-                    }
-                    else if (isConstEnum) {
-                        error(node.argumentExpression, ts.Diagnostics.Property_0_does_not_exist_on_const_enum_1, name_12, symbolToString(objectType.symbol));
-                        return unknownType;
-                    }
-                }
-            }
-            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 258 | 132 | 16777216)) {
-                if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 132) || isForInVariableForNumericPropertyNames(node.argumentExpression)) {
-                    var numberIndexInfo = getIndexInfoOfType(objectType, 1);
-                    if (numberIndexInfo) {
-                        getNodeLinks(node).resolvedIndexInfo = numberIndexInfo;
-                        return numberIndexInfo.type;
-                    }
-                }
-                var stringIndexInfo = getIndexInfoOfType(objectType, 0);
-                if (stringIndexInfo) {
-                    getNodeLinks(node).resolvedIndexInfo = stringIndexInfo;
-                    return stringIndexInfo.type;
-                }
-                if (compilerOptions.noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors && !isTypeAny(objectType)) {
-                    error(node, getIndexTypeOfType(objectType, 1) ?
-                        ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number :
-                        ts.Diagnostics.Index_signature_of_object_type_implicitly_has_an_any_type);
-                }
-                return anyType;
-            }
-            error(node, ts.Diagnostics.An_index_expression_argument_must_be_of_type_string_number_symbol_or_any);
-            return unknownType;
-        }
-        function getPropertyNameForIndexedAccess(indexArgumentExpression, indexArgumentType) {
-            if (indexArgumentExpression.kind === 9 || indexArgumentExpression.kind === 8) {
-                return indexArgumentExpression.text;
-            }
-            if (indexArgumentExpression.kind === 173 || indexArgumentExpression.kind === 172) {
-                var value = getConstantValue(indexArgumentExpression);
-                if (value !== undefined) {
-                    return value.toString();
-                }
-            }
-            if (checkThatExpressionIsProperSymbolReference(indexArgumentExpression, indexArgumentType, false)) {
-                var rightHandSideName = indexArgumentExpression.name.text;
-                return ts.getPropertyNameForKnownSymbolName(rightHandSideName);
-            }
-            return undefined;
-        }
-        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
-            if (expressionType === unknownType) {
-                return false;
-            }
-            if (!ts.isWellKnownSymbolSyntactically(expression)) {
-                return false;
-            }
-            if ((expressionType.flags & 16777216) === 0) {
-                if (reportError) {
-                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
-                }
-                return false;
-            }
-            var leftHandSide = expression.expression;
-            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
-            if (!leftHandSideSymbol) {
-                return false;
-            }
-            var globalESSymbol = getGlobalESSymbolConstructorSymbol();
-            if (!globalESSymbol) {
-                return false;
-            }
-            if (leftHandSideSymbol !== globalESSymbol) {
-                if (reportError) {
-                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
-                }
-                return false;
-            }
-            return true;
-        }
-        function resolveUntypedCall(node) {
-            if (node.kind === 176) {
-                checkExpression(node.template);
-            }
-            else if (node.kind !== 143) {
-                ts.forEach(node.arguments, function (argument) {
-                    checkExpression(argument);
-                });
-            }
-            return anySignature;
-        }
-        function resolveErrorCall(node) {
-            resolveUntypedCall(node);
-            return unknownSignature;
-        }
-        function reorderCandidates(signatures, result) {
-            var lastParent;
-            var lastSymbol;
-            var cutoffIndex = 0;
-            var index;
-            var specializedIndex = -1;
-            var spliceIndex;
-            ts.Debug.assert(!result.length);
-            for (var _i = 0, signatures_2 = signatures; _i < signatures_2.length; _i++) {
-                var signature = signatures_2[_i];
-                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
-                var parent_9 = signature.declaration && signature.declaration.parent;
-                if (!lastSymbol || symbol === lastSymbol) {
-                    if (lastParent && parent_9 === lastParent) {
-                        index++;
-                    }
-                    else {
-                        lastParent = parent_9;
-                        index = cutoffIndex;
-                    }
-                }
-                else {
-                    index = cutoffIndex = result.length;
-                    lastParent = parent_9;
-                }
-                lastSymbol = symbol;
-                if (signature.hasStringLiterals) {
-                    specializedIndex++;
-                    spliceIndex = specializedIndex;
-                    cutoffIndex++;
-                }
-                else {
-                    spliceIndex = index;
-                }
-                result.splice(spliceIndex, 0, signature);
-            }
-        }
-        function getSpreadArgumentIndex(args) {
-            for (var i = 0; i < args.length; i++) {
-                var arg = args[i];
-                if (arg && arg.kind === 191) {
-                    return i;
-                }
-            }
-            return -1;
-        }
-        function hasCorrectArity(node, args, signature) {
-            var adjustedArgCount;
-            var typeArguments;
-            var callIsIncomplete;
-            var isDecorator;
-            var spreadArgIndex = -1;
-            if (node.kind === 176) {
-                var tagExpression = node;
-                adjustedArgCount = args.length;
-                typeArguments = undefined;
-                if (tagExpression.template.kind === 189) {
-                    var templateExpression = tagExpression.template;
-                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
-                    ts.Debug.assert(lastSpan !== undefined);
-                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
-                }
-                else {
-                    var templateLiteral = tagExpression.template;
-                    ts.Debug.assert(templateLiteral.kind === 11);
-                    callIsIncomplete = !!templateLiteral.isUnterminated;
-                }
-            }
-            else if (node.kind === 143) {
-                isDecorator = true;
-                typeArguments = undefined;
-                adjustedArgCount = getEffectiveArgumentCount(node, undefined, signature);
-            }
-            else {
-                var callExpression = node;
-                if (!callExpression.arguments) {
-                    ts.Debug.assert(callExpression.kind === 175);
-                    return signature.minArgumentCount === 0;
-                }
-                adjustedArgCount = callExpression.arguments.hasTrailingComma ? args.length + 1 : args.length;
-                callIsIncomplete = callExpression.arguments.end === callExpression.end;
-                typeArguments = callExpression.typeArguments;
-                spreadArgIndex = getSpreadArgumentIndex(args);
-            }
-            var hasRightNumberOfTypeArgs = !typeArguments ||
-                (signature.typeParameters && typeArguments.length === signature.typeParameters.length);
-            if (!hasRightNumberOfTypeArgs) {
-                return false;
-            }
-            if (spreadArgIndex >= 0) {
-                return isRestParameterIndex(signature, spreadArgIndex);
-            }
-            if (!signature.hasRestParameter && adjustedArgCount > signature.parameters.length) {
-                return false;
-            }
-            var hasEnoughArguments = adjustedArgCount >= signature.minArgumentCount;
-            return callIsIncomplete || hasEnoughArguments;
-        }
-        function getSingleCallSignature(type) {
-            if (type.flags & 80896) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
-                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                    return resolved.callSignatures[0];
-                }
-            }
-            return undefined;
-        }
-        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
-            var context = createInferenceContext(signature.typeParameters, true);
-            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
-                inferTypes(context, instantiateType(source, contextualMapper), target);
-            });
-            return getSignatureInstantiation(signature, getInferredTypes(context));
-        }
-        function inferTypeArguments(node, signature, args, excludeArgument, context) {
-            var typeParameters = signature.typeParameters;
-            var inferenceMapper = getInferenceMapper(context);
-            for (var i = 0; i < typeParameters.length; i++) {
-                if (!context.inferences[i].isFixed) {
-                    context.inferredTypes[i] = undefined;
-                }
-            }
-            if (context.failedTypeParameterIndex !== undefined && !context.inferences[context.failedTypeParameterIndex].isFixed) {
-                context.failedTypeParameterIndex = undefined;
-            }
-            if (signature.thisType) {
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                inferTypes(context, thisArgumentType, signature.thisType);
-            }
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                if (arg === undefined || arg.kind !== 193) {
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    if (argType === undefined) {
-                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : inferenceMapper;
-                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
-                    }
-                    inferTypes(context, argType, paramType);
-                }
-            }
-            if (excludeArgument) {
-                for (var i = 0; i < argCount; i++) {
-                    if (excludeArgument[i] === false) {
-                        var arg = args[i];
-                        var paramType = getTypeAtPosition(signature, i);
-                        inferTypes(context, checkExpressionWithContextualType(arg, paramType, inferenceMapper), paramType);
-                    }
-                }
-            }
-            getInferredTypes(context);
-        }
-        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
-            var typeParameters = signature.typeParameters;
-            var typeArgumentsAreAssignable = true;
-            var mapper;
-            for (var i = 0; i < typeParameters.length; i++) {
-                if (typeArgumentsAreAssignable) {
-                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                    if (constraint) {
-                        var errorInfo = void 0;
-                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
-                        if (reportErrors && headMessage) {
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
-                            typeArgumentHeadMessage = headMessage;
-                        }
-                        if (!mapper) {
-                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
-                        }
-                        var typeArgument = typeArgumentTypes[i];
-                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
-                    }
-                }
-            }
-            return typeArgumentsAreAssignable;
-        }
-        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
-            if (signature.thisType && signature.thisType !== voidType && node.kind !== 175) {
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
-                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
-                if (!checkTypeRelatedTo(thisArgumentType, signature.thisType, relation, errorNode, headMessage_1)) {
-                    return false;
-                }
-            }
-            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                if (arg === undefined || arg.kind !== 193) {
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    if (argType === undefined) {
-                        argType = arg.kind === 9 && !reportErrors
-                            ? getStringLiteralTypeForText(arg.text)
-                            : checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
-                    }
-                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
-                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        function getThisArgumentOfCall(node) {
-            if (node.kind === 174) {
-                var callee = node.expression;
-                if (callee.kind === 172) {
-                    return callee.expression;
-                }
-                else if (callee.kind === 173) {
-                    return callee.expression;
-                }
-            }
-        }
-        function getEffectiveCallArguments(node) {
-            var args;
-            if (node.kind === 176) {
-                var template = node.template;
-                args = [undefined];
-                if (template.kind === 189) {
-                    ts.forEach(template.templateSpans, function (span) {
-                        args.push(span.expression);
-                    });
-                }
-            }
-            else if (node.kind === 143) {
-                return undefined;
-            }
-            else {
-                args = node.arguments || emptyArray;
-            }
-            return args;
-        }
-        function getEffectiveArgumentCount(node, args, signature) {
-            if (node.kind === 143) {
-                switch (node.parent.kind) {
-                    case 221:
-                    case 192:
-                        return 1;
-                    case 145:
-                        return 2;
-                    case 147:
-                    case 149:
-                    case 150:
-                        if (languageVersion === 0) {
-                            return 2;
-                        }
-                        return signature.parameters.length >= 3 ? 3 : 2;
-                    case 142:
-                        return 3;
-                }
-            }
-            else {
-                return args.length;
-            }
-        }
-        function getEffectiveDecoratorFirstArgumentType(node) {
-            if (node.kind === 221) {
-                var classSymbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(classSymbol);
-            }
-            if (node.kind === 142) {
-                node = node.parent;
-                if (node.kind === 148) {
-                    var classSymbol = getSymbolOfNode(node);
-                    return getTypeOfSymbol(classSymbol);
-                }
-            }
-            if (node.kind === 145 ||
-                node.kind === 147 ||
-                node.kind === 149 ||
-                node.kind === 150) {
-                return getParentTypeOfClassElement(node);
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        function getEffectiveDecoratorSecondArgumentType(node) {
-            if (node.kind === 221) {
-                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 142) {
-                node = node.parent;
-                if (node.kind === 148) {
-                    return anyType;
-                }
-            }
-            if (node.kind === 145 ||
-                node.kind === 147 ||
-                node.kind === 149 ||
-                node.kind === 150) {
-                var element = node;
-                switch (element.name.kind) {
-                    case 69:
-                    case 8:
-                    case 9:
-                        return getStringLiteralTypeForText(element.name.text);
-                    case 140:
-                        var nameType = checkComputedPropertyName(element.name);
-                        if (isTypeOfKind(nameType, 16777216)) {
-                            return nameType;
-                        }
-                        else {
-                            return stringType;
-                        }
-                    default:
-                        ts.Debug.fail("Unsupported property name.");
-                        return unknownType;
-                }
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        function getEffectiveDecoratorThirdArgumentType(node) {
-            if (node.kind === 221) {
-                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 142) {
-                return numberType;
-            }
-            if (node.kind === 145) {
-                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 147 ||
-                node.kind === 149 ||
-                node.kind === 150) {
-                var propertyType = getTypeOfNode(node);
-                return createTypedPropertyDescriptorType(propertyType);
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        function getEffectiveDecoratorArgumentType(node, argIndex) {
-            if (argIndex === 0) {
-                return getEffectiveDecoratorFirstArgumentType(node.parent);
-            }
-            else if (argIndex === 1) {
-                return getEffectiveDecoratorSecondArgumentType(node.parent);
-            }
-            else if (argIndex === 2) {
-                return getEffectiveDecoratorThirdArgumentType(node.parent);
-            }
-            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
-            return unknownType;
-        }
-        function getEffectiveArgumentType(node, argIndex, arg) {
-            if (node.kind === 143) {
-                return getEffectiveDecoratorArgumentType(node, argIndex);
-            }
-            else if (argIndex === 0 && node.kind === 176) {
-                return getGlobalTemplateStringsArrayType();
-            }
-            return undefined;
-        }
-        function getEffectiveArgument(node, args, argIndex) {
-            if (node.kind === 143 ||
-                (argIndex === 0 && node.kind === 176)) {
-                return undefined;
-            }
-            return args[argIndex];
-        }
-        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
-            if (node.kind === 143) {
-                return node.expression;
-            }
-            else if (argIndex === 0 && node.kind === 176) {
-                return node.template;
-            }
-            else {
-                return arg;
-            }
-        }
-        function resolveCall(node, signatures, candidatesOutArray, headMessage) {
-            var isTaggedTemplate = node.kind === 176;
-            var isDecorator = node.kind === 143;
-            var typeArguments;
-            if (!isTaggedTemplate && !isDecorator) {
-                typeArguments = node.typeArguments;
-                if (node.expression.kind !== 95) {
-                    ts.forEach(typeArguments, checkSourceElement);
-                }
-            }
-            var candidates = candidatesOutArray || [];
-            reorderCandidates(signatures, candidates);
-            if (!candidates.length) {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
-                return resolveErrorCall(node);
-            }
-            var args = getEffectiveCallArguments(node);
-            var excludeArgument;
-            if (!isDecorator) {
-                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
-                    if (isContextSensitive(args[i])) {
-                        if (!excludeArgument) {
-                            excludeArgument = new Array(args.length);
-                        }
-                        excludeArgument[i] = true;
-                    }
-                }
-            }
-            var candidateForArgumentError;
-            var candidateForTypeArgumentError;
-            var resultOfFailedInference;
-            var result;
-            if (candidates.length > 1) {
-                result = chooseOverload(candidates, subtypeRelation);
-            }
-            if (!result) {
-                candidateForArgumentError = undefined;
-                candidateForTypeArgumentError = undefined;
-                resultOfFailedInference = undefined;
-                result = chooseOverload(candidates, assignableRelation);
-            }
-            if (result) {
-                return result;
-            }
-            if (candidateForArgumentError) {
-                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, undefined, true);
-            }
-            else if (candidateForTypeArgumentError) {
-                if (!isTaggedTemplate && !isDecorator && typeArguments) {
-                    var typeArguments_2 = node.typeArguments;
-                    checkTypeArguments(candidateForTypeArgumentError, typeArguments_2, ts.map(typeArguments_2, getTypeFromTypeNode), true, headMessage);
-                }
-                else {
-                    ts.Debug.assert(resultOfFailedInference.failedTypeParameterIndex >= 0);
-                    var failedTypeParameter = candidateForTypeArgumentError.typeParameters[resultOfFailedInference.failedTypeParameterIndex];
-                    var inferenceCandidates = getInferenceCandidates(resultOfFailedInference, resultOfFailedInference.failedTypeParameterIndex);
-                    var diagnosticChainHead = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly, typeToString(failedTypeParameter));
-                    if (headMessage) {
-                        diagnosticChainHead = ts.chainDiagnosticMessages(diagnosticChainHead, headMessage);
-                    }
-                    reportNoCommonSupertypeError(inferenceCandidates, node.expression || node.tag, diagnosticChainHead);
-                }
-            }
-            else {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
-            }
-            if (!produceDiagnostics) {
-                for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
-                    var candidate = candidates_1[_i];
-                    if (hasCorrectArity(node, args, candidate)) {
-                        if (candidate.typeParameters && typeArguments) {
-                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNode));
-                        }
-                        return candidate;
-                    }
-                }
-            }
-            return resolveErrorCall(node);
-            function reportError(message, arg0, arg1, arg2) {
-                var errorInfo;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
-                if (headMessage) {
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
-            }
-            function chooseOverload(candidates, relation) {
-                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
-                    var originalCandidate = candidates_2[_i];
-                    if (!hasCorrectArity(node, args, originalCandidate)) {
-                        continue;
-                    }
-                    var candidate = void 0;
-                    var typeArgumentsAreValid = void 0;
-                    var inferenceContext = originalCandidate.typeParameters
-                        ? createInferenceContext(originalCandidate.typeParameters, false)
-                        : undefined;
-                    while (true) {
-                        candidate = originalCandidate;
-                        if (candidate.typeParameters) {
-                            var typeArgumentTypes = void 0;
-                            if (typeArguments) {
-                                typeArgumentTypes = ts.map(typeArguments, getTypeFromTypeNode);
-                                typeArgumentsAreValid = checkTypeArguments(candidate, typeArguments, typeArgumentTypes, false);
-                            }
-                            else {
-                                inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
-                                typeArgumentsAreValid = inferenceContext.failedTypeParameterIndex === undefined;
-                                typeArgumentTypes = inferenceContext.inferredTypes;
-                            }
-                            if (!typeArgumentsAreValid) {
-                                break;
-                            }
-                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
-                        }
-                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, false)) {
-                            break;
-                        }
-                        var index = excludeArgument ? ts.indexOf(excludeArgument, true) : -1;
-                        if (index < 0) {
-                            return candidate;
-                        }
-                        excludeArgument[index] = false;
-                    }
-                    if (originalCandidate.typeParameters) {
-                        var instantiatedCandidate = candidate;
-                        if (typeArgumentsAreValid) {
-                            candidateForArgumentError = instantiatedCandidate;
-                        }
-                        else {
-                            candidateForTypeArgumentError = originalCandidate;
-                            if (!typeArguments) {
-                                resultOfFailedInference = inferenceContext;
-                            }
-                        }
-                    }
-                    else {
-                        ts.Debug.assert(originalCandidate === candidate);
-                        candidateForArgumentError = originalCandidate;
-                    }
-                }
-                return undefined;
-            }
-        }
-        function resolveCallExpression(node, candidatesOutArray) {
-            if (node.expression.kind === 95) {
-                var superType = checkSuperExpression(node.expression);
-                if (superType !== unknownType) {
-                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
-                    if (baseTypeNode) {
-                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments);
-                        return resolveCall(node, baseConstructors, candidatesOutArray);
-                    }
-                }
-                return resolveUntypedCall(node);
-            }
-            var funcType = checkNonNullExpression(node.expression);
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0);
-            var constructSignatures = getSignaturesOfType(apparentType, 1);
-            if (isTypeAny(funcType) || (!callSignatures.length && !constructSignatures.length && !(funcType.flags & 16384) && isTypeAssignableTo(funcType, globalFunctionType))) {
-                if (funcType !== unknownType && node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
-                }
-                return resolveUntypedCall(node);
-            }
-            if (!callSignatures.length) {
-                if (constructSignatures.length) {
-                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
-                }
-                else {
-                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                }
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        function resolveNewExpression(node, candidatesOutArray) {
-            if (node.arguments && languageVersion < 1) {
-                var spreadIndex = getSpreadArgumentIndex(node.arguments);
-                if (spreadIndex >= 0) {
-                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
-                }
-            }
-            var expressionType = checkNonNullExpression(node.expression);
-            expressionType = getApparentType(expressionType);
-            if (expressionType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
-            if (valueDecl && valueDecl.flags & 128) {
-                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
-                return resolveErrorCall(node);
-            }
-            if (isTypeAny(expressionType)) {
-                if (node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
-                }
-                return resolveUntypedCall(node);
-            }
-            var constructSignatures = getSignaturesOfType(expressionType, 1);
-            if (constructSignatures.length) {
-                if (!isConstructorAccessible(node, constructSignatures[0])) {
-                    return resolveErrorCall(node);
-                }
-                return resolveCall(node, constructSignatures, candidatesOutArray);
-            }
-            var callSignatures = getSignaturesOfType(expressionType, 0);
-            if (callSignatures.length) {
-                var signature = resolveCall(node, callSignatures, candidatesOutArray);
-                if (getReturnTypeOfSignature(signature) !== voidType) {
-                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
-                }
-                if (signature.thisType === voidType) {
-                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
-                }
-                return signature;
-            }
-            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
-            return resolveErrorCall(node);
-        }
-        function isConstructorAccessible(node, signature) {
-            if (!signature || !signature.declaration) {
-                return true;
-            }
-            var declaration = signature.declaration;
-            var flags = declaration.flags;
-            if (!(flags & (8 | 16))) {
-                return true;
-            }
-            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
-            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
-            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                if (flags & 8) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
-                if (flags & 16) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
-                return false;
-            }
-            return true;
-        }
-        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
-            var tagType = checkExpression(node.tag);
-            var apparentType = getApparentType(tagType);
-            if (apparentType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0);
-            if (isTypeAny(tagType) || (!callSignatures.length && !(tagType.flags & 16384) && isTypeAssignableTo(tagType, globalFunctionType))) {
-                return resolveUntypedCall(node);
-            }
-            if (!callSignatures.length) {
-                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        function getDiagnosticHeadMessageForDecoratorResolution(node) {
-            switch (node.parent.kind) {
-                case 221:
-                case 192:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
-                case 142:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
-                case 145:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
-                case 147:
-                case 149:
-                case 150:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
-            }
-        }
-        function resolveDecorator(node, candidatesOutArray) {
-            var funcType = checkExpression(node.expression);
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0);
-            if (funcType === anyType || (!callSignatures.length && !(funcType.flags & 16384) && isTypeAssignableTo(funcType, globalFunctionType))) {
-                return resolveUntypedCall(node);
-            }
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            if (!callSignatures.length) {
-                var errorInfo = void 0;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
-        }
-        function resolveSignature(node, candidatesOutArray) {
-            switch (node.kind) {
-                case 174:
-                    return resolveCallExpression(node, candidatesOutArray);
-                case 175:
-                    return resolveNewExpression(node, candidatesOutArray);
-                case 176:
-                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
-                case 143:
-                    return resolveDecorator(node, candidatesOutArray);
-            }
-            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
-        }
-        function getResolvedSignature(node, candidatesOutArray) {
-            var links = getNodeLinks(node);
-            var cached = links.resolvedSignature;
-            if (cached && cached !== anySignature && !candidatesOutArray) {
-                return cached;
-            }
-            links.resolvedSignature = anySignature;
-            var result = resolveSignature(node, candidatesOutArray);
-            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
-            return result;
-        }
-        function getResolvedOrAnySignature(node) {
-            return getNodeLinks(node).resolvedSignature === anySignature ? anySignature : getResolvedSignature(node);
-        }
-        function getInferredClassType(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.inferredClassType) {
-                links.inferredClassType = createAnonymousType(undefined, symbol.members, emptyArray, emptyArray, undefined, undefined);
-            }
-            return links.inferredClassType;
-        }
-        function checkCallExpression(node) {
-            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
-            var signature = getResolvedSignature(node);
-            if (node.expression.kind === 95) {
-                return voidType;
-            }
-            if (node.kind === 175) {
-                var declaration = signature.declaration;
-                if (declaration &&
-                    declaration.kind !== 148 &&
-                    declaration.kind !== 152 &&
-                    declaration.kind !== 157 &&
-                    !ts.isJSDocConstructSignature(declaration)) {
-                    var funcSymbol = checkExpression(node.expression).symbol;
-                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16)) {
-                        return getInferredClassType(funcSymbol);
-                    }
-                    else if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
-                    }
-                    return anyType;
-                }
-            }
-            if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, true)) {
-                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
-            }
-            return getReturnTypeOfSignature(signature);
-        }
-        function checkTaggedTemplateExpression(node) {
-            return getReturnTypeOfSignature(getResolvedSignature(node));
-        }
-        function checkAssertion(node) {
-            var exprType = getRegularTypeOfObjectLiteral(checkExpression(node.expression));
-            var targetType = getTypeFromTypeNode(node.type);
-            if (produceDiagnostics && targetType !== unknownType) {
-                var widenedType = getWidenedType(exprType);
-                if (!isTypeComparableTo(targetType, widenedType)) {
-                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
-                }
-            }
-            return targetType;
-        }
-        function checkNonNullAssertion(node) {
-            return getNonNullableType(checkExpression(node.expression));
-        }
-        function getTypeOfParameter(symbol) {
-            var type = getTypeOfSymbol(symbol);
-            if (strictNullChecks) {
-                var declaration = symbol.valueDeclaration;
-                if (declaration && declaration.initializer) {
-                    return addNullableKind(type, 32);
-                }
-            }
-            return type;
-        }
-        function getTypeAtPosition(signature, pos) {
-            return signature.hasRestParameter ?
-                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
-                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
-        }
-        function assignContextualParameterTypes(signature, context, mapper) {
-            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
-            for (var i = 0; i < len; i++) {
-                var parameter = signature.parameters[i];
-                var contextualParameterType = getTypeAtPosition(context, i);
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
-            }
-            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
-                var parameter = ts.lastOrUndefined(signature.parameters);
-                var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
-            }
-        }
-        function assignBindingElementTypes(node) {
-            if (ts.isBindingPattern(node.name)) {
-                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (element.kind !== 193) {
-                        if (element.name.kind === 69) {
-                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
-                        }
-                        assignBindingElementTypes(element);
-                    }
-                }
-            }
-        }
-        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType, mapper) {
-            var links = getSymbolLinks(parameter);
-            if (!links.type) {
-                links.type = instantiateType(contextualType, mapper);
-                if (links.type === emptyObjectType &&
-                    (parameter.valueDeclaration.name.kind === 167 ||
-                        parameter.valueDeclaration.name.kind === 168)) {
-                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
-                }
-                assignBindingElementTypes(parameter.valueDeclaration);
-            }
-            else if (isInferentialContext(mapper)) {
-                inferTypes(mapper.context, links.type, instantiateType(contextualType, mapper));
-            }
-        }
-        function getReturnTypeFromJSDocComment(func) {
-            var returnTag = ts.getJSDocReturnTag(func);
-            if (returnTag && returnTag.typeExpression) {
-                return getTypeFromTypeNode(returnTag.typeExpression.type);
-            }
-            return undefined;
-        }
-        function createPromiseType(promisedType) {
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType !== emptyGenericType) {
-                promisedType = getAwaitedType(promisedType);
-                return createTypeReference(globalPromiseType, [promisedType]);
-            }
-            return emptyObjectType;
-        }
-        function getReturnTypeFromBody(func, contextualMapper) {
-            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
-            if (!func.body) {
-                return unknownType;
-            }
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var type;
-            if (func.body.kind !== 199) {
-                type = checkExpressionCached(func.body, contextualMapper);
-                if (isAsync) {
-                    type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                }
-            }
-            else {
-                var types = void 0;
-                var funcIsGenerator = !!func.asteriskToken;
-                if (funcIsGenerator) {
-                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
-                    if (types.length === 0) {
-                        var iterableIteratorAny = createIterableIteratorType(anyType);
-                        if (compilerOptions.noImplicitAny) {
-                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
-                        }
-                        return iterableIteratorAny;
-                    }
-                }
-                else {
-                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
-                    if (!types) {
-                        return neverType;
-                    }
-                    if (types.length === 0) {
-                        if (isAsync) {
-                            var promiseType = createPromiseType(voidType);
-                            if (promiseType === emptyObjectType) {
-                                error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-                                return unknownType;
-                            }
-                            return promiseType;
-                        }
-                        return voidType;
-                    }
-                }
-                type = contextualSignature ? getUnionType(types) : getCommonSupertype(types);
-                if (!type) {
-                    if (funcIsGenerator) {
-                        error(func, ts.Diagnostics.No_best_common_type_exists_among_yield_expressions);
-                        return createIterableIteratorType(unknownType);
-                    }
-                    else {
-                        error(func, ts.Diagnostics.No_best_common_type_exists_among_return_expressions);
-                        return getUnionType(types);
-                    }
-                }
-                if (funcIsGenerator) {
-                    type = createIterableIteratorType(type);
-                }
-            }
-            if (!contextualSignature) {
-                reportErrorsFromWidening(func, type);
-            }
-            var widenedType = getWidenedType(type);
-            if (isAsync) {
-                var promiseType = createPromiseType(widenedType);
-                if (promiseType === emptyObjectType) {
-                    error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-                    return unknownType;
-                }
-                return promiseType;
-            }
-            else {
-                return widenedType;
-            }
-        }
-        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
-            var aggregatedTypes = [];
-            ts.forEachYieldExpression(func.body, function (yieldExpression) {
-                var expr = yieldExpression.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (yieldExpression.asteriskToken) {
-                        type = checkElementTypeOfIterable(type, yieldExpression.expression);
-                    }
-                    if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
-                    }
-                }
-            });
-            return aggregatedTypes;
-        }
-        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var aggregatedTypes = [];
-            var hasReturnWithNoExpression = !!(func.flags & 32768);
-            var hasReturnOfTypeNever = false;
-            ts.forEachReturnStatement(func.body, function (returnStatement) {
-                var expr = returnStatement.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (isAsync) {
-                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                    }
-                    if (type === neverType) {
-                        hasReturnOfTypeNever = true;
-                    }
-                    else if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
-                    }
-                }
-                else {
-                    hasReturnWithNoExpression = true;
-                }
-            });
-            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
-                func.kind === 179 || func.kind === 180)) {
-                return undefined;
-            }
-            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
-                if (!ts.contains(aggregatedTypes, undefinedType)) {
-                    aggregatedTypes.push(undefinedType);
-                }
-            }
-            return aggregatedTypes;
-        }
-        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            if (returnType && maybeTypeOfKind(returnType, 1 | 16)) {
-                return;
-            }
-            if (ts.nodeIsMissing(func.body) || func.body.kind !== 199 || !(func.flags & 32768)) {
-                return;
-            }
-            var hasExplicitReturn = func.flags & 65536;
-            if (returnType === neverType) {
-                error(func.type, ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
-            }
-            else if (returnType && !hasExplicitReturn) {
-                error(func.type, ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
-            }
-            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
-                error(func.type, ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
-            }
-            else if (compilerOptions.noImplicitReturns) {
-                if (!returnType) {
-                    if (!hasExplicitReturn) {
-                        return;
-                    }
-                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
-                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
-                        return;
-                    }
-                }
-                error(func.type || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
-            }
-        }
-        function checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper) {
-            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
-            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
-            if (!hasGrammarError && node.kind === 179) {
-                checkGrammarForGenerator(node);
-            }
-            if (contextualMapper === identityMapper && isContextSensitive(node)) {
-                checkNodeDeferred(node);
-                return anyFunctionType;
-            }
-            var links = getNodeLinks(node);
-            var type = getTypeOfSymbol(node.symbol);
-            var contextSensitive = isContextSensitive(node);
-            var mightFixTypeParameters = contextSensitive && isInferentialContext(contextualMapper);
-            if (mightFixTypeParameters || !(links.flags & 1024)) {
-                var contextualSignature = getContextualSignature(node);
-                var contextChecked = !!(links.flags & 1024);
-                if (mightFixTypeParameters || !contextChecked) {
-                    links.flags |= 1024;
-                    if (contextualSignature) {
-                        var signature = getSignaturesOfType(type, 0)[0];
-                        if (contextSensitive) {
-                            assignContextualParameterTypes(signature, contextualSignature, contextualMapper || identityMapper);
-                        }
-                        if (mightFixTypeParameters || !node.type && !signature.resolvedReturnType) {
-                            var returnType = getReturnTypeFromBody(node, contextualMapper);
-                            if (!signature.resolvedReturnType) {
-                                signature.resolvedReturnType = returnType;
-                            }
-                        }
-                    }
-                    if (!contextChecked) {
-                        checkSignatureDeclaration(node);
-                        checkNodeDeferred(node);
-                    }
-                }
-            }
-            if (produceDiagnostics && node.kind !== 147 && node.kind !== 146) {
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-            }
-            return type;
-        }
-        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
-            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
-            var isAsync = ts.isAsyncFunctionLike(node);
-            var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-            if (!node.asteriskToken) {
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (node.body) {
-                if (!node.type) {
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
-                }
-                if (node.body.kind === 199) {
-                    checkSourceElement(node.body);
-                }
-                else {
-                    var exprType = checkExpression(node.body);
-                    if (returnOrPromisedType) {
-                        if (isAsync) {
-                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member);
-                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
-                        }
-                    }
-                }
-            }
-        }
-        function checkArithmeticOperandType(operand, type, diagnostic) {
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 132)) {
-                error(operand, diagnostic);
-                return false;
-            }
-            return true;
-        }
-        function isReadonlySymbol(symbol) {
-            return symbol.flags & 4 && (getDeclarationFlagsFromSymbol(symbol) & 64) !== 0 ||
-                symbol.flags & 3 && (getDeclarationFlagsFromSymbol(symbol) & 2048) !== 0 ||
-                symbol.flags & 98304 && !(symbol.flags & 65536) ||
-                (symbol.flags & 8) !== 0;
-        }
-        function isReferenceToReadonlyEntity(expr, symbol) {
-            if (isReadonlySymbol(symbol)) {
-                if (symbol.flags & 4 &&
-                    (expr.kind === 172 || expr.kind === 173) &&
-                    expr.expression.kind === 97) {
-                    var func = ts.getContainingFunction(expr);
-                    if (!(func && func.kind === 148))
-                        return true;
-                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
-                }
-                return true;
-            }
-            return false;
-        }
-        function isReferenceThroughNamespaceImport(expr) {
-            if (expr.kind === 172 || expr.kind === 173) {
-                var node = skipParenthesizedNodes(expr.expression);
-                if (node.kind === 69) {
-                    var symbol = getNodeLinks(node).resolvedSymbol;
-                    if (symbol.flags & 8388608) {
-                        var declaration = getDeclarationOfAliasSymbol(symbol);
-                        return declaration && declaration.kind === 232;
-                    }
-                }
-            }
-            return false;
-        }
-        function checkReferenceExpression(expr, invalidReferenceMessage, constantVariableMessage) {
-            var node = skipParenthesizedNodes(expr);
-            if (node.kind !== 69 && node.kind !== 172 && node.kind !== 173) {
-                error(expr, invalidReferenceMessage);
-                return false;
-            }
-            var links = getNodeLinks(node);
-            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
-            if (symbol) {
-                if (symbol !== unknownSymbol && symbol !== argumentsSymbol) {
-                    if (node.kind === 69 && !(symbol.flags & 3)) {
-                        error(expr, invalidReferenceMessage);
-                        return false;
-                    }
-                    if (isReferenceToReadonlyEntity(node, symbol) || isReferenceThroughNamespaceImport(node)) {
-                        error(expr, constantVariableMessage);
-                        return false;
-                    }
-                }
-            }
-            else if (node.kind === 173) {
-                if (links.resolvedIndexInfo && links.resolvedIndexInfo.isReadonly) {
-                    error(expr, constantVariableMessage);
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkDeleteExpression(node) {
-            checkExpression(node.expression);
-            return booleanType;
-        }
-        function checkTypeOfExpression(node) {
-            checkExpression(node.expression);
-            return stringType;
-        }
-        function checkVoidExpression(node) {
-            checkExpression(node.expression);
-            return undefinedType;
-        }
-        function checkAwaitExpression(node) {
-            if (produceDiagnostics) {
-                if (!(node.flags & 33554432)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
-                }
-            }
-            var operandType = checkExpression(node.expression);
-            return checkAwaitedType(operandType, node);
-        }
-        function checkPrefixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            switch (node.operator) {
-                case 35:
-                case 36:
-                case 50:
-                    if (maybeTypeOfKind(operandType, 16777216)) {
-                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
-                    }
-                    return numberType;
-                case 49:
-                    return booleanType;
-                case 41:
-                case 42:
-                    var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-                    if (ok) {
-                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
-                    }
-                    return numberType;
-            }
-            return unknownType;
-        }
-        function checkPostfixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-            if (ok) {
-                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
-            }
-            return numberType;
-        }
-        function maybeTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 49152) {
-                var types = type.types;
-                for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
-                    var t = types_10[_i];
-                    if (maybeTypeOfKind(t, kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 16384) {
-                var types = type.types;
-                for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
-                    var t = types_11[_i];
-                    if (!isTypeOfKind(t, kind)) {
-                        return false;
-                    }
-                }
-                return true;
-            }
-            if (type.flags & 32768) {
-                var types = type.types;
-                for (var _a = 0, types_12 = types; _a < types_12.length; _a++) {
-                    var t = types_12[_a];
-                    if (isTypeOfKind(t, kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isConstEnumObjectType(type) {
-            return type.flags & (80896 | 65536) && type.symbol && isConstEnumSymbol(type.symbol);
-        }
-        function isConstEnumSymbol(symbol) {
-            return (symbol.flags & 128) !== 0;
-        }
-        function checkInstanceOfExpression(left, right, leftType, rightType) {
-            if (isTypeOfKind(leftType, 16777726)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            if (!(isTypeAny(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
-            }
-            return booleanType;
-        }
-        function checkInExpression(left, right, leftType, rightType) {
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 | 132 | 16777216)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
-            }
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 | 512)) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            return booleanType;
-        }
-        function checkObjectLiteralAssignment(node, sourceType, contextualMapper) {
-            var properties = node.properties;
-            for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
-                var p = properties_3[_i];
-                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, contextualMapper);
-            }
-            return sourceType;
-        }
-        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, contextualMapper) {
-            if (property.kind === 253 || property.kind === 254) {
-                var name_13 = property.name;
-                if (name_13.kind === 140) {
-                    checkComputedPropertyName(name_13);
-                }
-                if (isComputedNonLiteralName(name_13)) {
-                    return undefined;
-                }
-                var text = getTextOfPropertyName(name_13);
-                var type = isTypeAny(objectLiteralType)
-                    ? objectLiteralType
-                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
-                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1) ||
-                        getIndexTypeOfType(objectLiteralType, 0);
-                if (type) {
-                    if (property.kind === 254) {
-                        return checkDestructuringAssignment(property, type);
-                    }
-                    else {
-                        return checkDestructuringAssignment(property.initializer, type);
-                    }
-                }
-                else {
-                    error(name_13, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_13));
-                }
-            }
-            else {
-                error(property, ts.Diagnostics.Property_assignment_expected);
-            }
-        }
-        function checkArrayLiteralAssignment(node, sourceType, contextualMapper) {
-            var elementType = checkIteratedTypeOrElementType(sourceType, node, false) || unknownType;
-            var elements = node.elements;
-            for (var i = 0; i < elements.length; i++) {
-                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, contextualMapper);
-            }
-            return sourceType;
-        }
-        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, contextualMapper) {
-            var elements = node.elements;
-            var element = elements[elementIndex];
-            if (element.kind !== 193) {
-                if (element.kind !== 191) {
-                    var propName = "" + elementIndex;
-                    var type = isTypeAny(sourceType)
-                        ? sourceType
-                        : isTupleLikeType(sourceType)
-                            ? getTypeOfPropertyOfType(sourceType, propName)
-                            : elementType;
-                    if (type) {
-                        return checkDestructuringAssignment(element, type, contextualMapper);
-                    }
-                    else {
-                        if (isTupleType(sourceType)) {
-                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), sourceType.elementTypes.length, elements.length);
-                        }
-                        else {
-                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
-                        }
-                    }
-                }
-                else {
-                    if (elementIndex < elements.length - 1) {
-                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
-                    }
-                    else {
-                        var restExpression = element.expression;
-                        if (restExpression.kind === 187 && restExpression.operatorToken.kind === 56) {
-                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
-                        }
-                        else {
-                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), contextualMapper);
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function checkDestructuringAssignment(exprOrAssignment, sourceType, contextualMapper) {
-            var target;
-            if (exprOrAssignment.kind === 254) {
-                var prop = exprOrAssignment;
-                if (prop.objectAssignmentInitializer) {
-                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, contextualMapper);
-                }
-                target = exprOrAssignment.name;
-            }
-            else {
-                target = exprOrAssignment;
-            }
-            if (target.kind === 187 && target.operatorToken.kind === 56) {
-                checkBinaryExpression(target, contextualMapper);
-                target = target.left;
-            }
-            if (target.kind === 171) {
-                return checkObjectLiteralAssignment(target, sourceType, contextualMapper);
-            }
-            if (target.kind === 170) {
-                return checkArrayLiteralAssignment(target, sourceType, contextualMapper);
-            }
-            return checkReferenceAssignment(target, sourceType, contextualMapper);
-        }
-        function checkReferenceAssignment(target, sourceType, contextualMapper) {
-            var targetType = checkExpression(target, contextualMapper);
-            if (checkReferenceExpression(target, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property)) {
-                checkTypeAssignableTo(sourceType, targetType, target, undefined);
-            }
-            return sourceType;
-        }
-        function isTypeEqualityComparableTo(source, target) {
-            return (target.flags & 96) !== 0 || isTypeComparableTo(source, target);
-        }
-        function checkBinaryExpression(node, contextualMapper) {
-            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, contextualMapper, node);
-        }
-        function checkBinaryLikeExpression(left, operatorToken, right, contextualMapper, errorNode) {
-            var operator = operatorToken.kind;
-            if (operator === 56 && (left.kind === 171 || left.kind === 170)) {
-                return checkDestructuringAssignment(left, checkExpression(right, contextualMapper), contextualMapper);
-            }
-            var leftType = checkExpression(left, contextualMapper);
-            var rightType = checkExpression(right, contextualMapper);
-            switch (operator) {
-                case 37:
-                case 38:
-                case 59:
-                case 60:
-                case 39:
-                case 61:
-                case 40:
-                case 62:
-                case 36:
-                case 58:
-                case 43:
-                case 63:
-                case 44:
-                case 64:
-                case 45:
-                case 65:
-                case 47:
-                case 67:
-                case 48:
-                case 68:
-                case 46:
-                case 66:
-                    if (leftType.flags & 96)
-                        leftType = rightType;
-                    if (rightType.flags & 96)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var suggestedOperator = void 0;
-                    if ((leftType.flags & 8) &&
-                        (rightType.flags & 8) &&
-                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
-                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
-                    }
-                    else {
-                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        if (leftOk && rightOk) {
-                            checkAssignmentOperator(numberType);
-                        }
-                    }
-                    return numberType;
-                case 35:
-                case 57:
-                    if (leftType.flags & 96)
-                        leftType = rightType;
-                    if (rightType.flags & 96)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var resultType = void 0;
-                    if (isTypeOfKind(leftType, 132) && isTypeOfKind(rightType, 132)) {
-                        resultType = numberType;
-                    }
-                    else {
-                        if (isTypeOfKind(leftType, 258) || isTypeOfKind(rightType, 258)) {
-                            resultType = stringType;
-                        }
-                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
-                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
-                        }
-                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
-                            return resultType;
-                        }
-                    }
-                    if (!resultType) {
-                        reportOperatorError();
-                        return anyType;
-                    }
-                    if (operator === 57) {
-                        checkAssignmentOperator(resultType);
-                    }
-                    return resultType;
-                case 25:
-                case 27:
-                case 28:
-                case 29:
-                    if (checkForDisallowedESSymbolOperand(operator)) {
-                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
-                            reportOperatorError();
-                        }
-                    }
-                    return booleanType;
-                case 30:
-                case 31:
-                case 32:
-                case 33:
-                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
-                        reportOperatorError();
-                    }
-                    return booleanType;
-                case 91:
-                    return checkInstanceOfExpression(left, right, leftType, rightType);
-                case 90:
-                    return checkInExpression(left, right, leftType, rightType);
-                case 51:
-                    return addNullableKind(rightType, getNullableKind(leftType));
-                case 52:
-                    return getUnionType([getNonNullableType(leftType), rightType]);
-                case 56:
-                    checkAssignmentOperator(rightType);
-                    return getRegularTypeOfObjectLiteral(rightType);
-                case 24:
-                    return rightType;
-            }
-            function checkForDisallowedESSymbolOperand(operator) {
-                var offendingSymbolOperand = maybeTypeOfKind(leftType, 16777216) ? left :
-                    maybeTypeOfKind(rightType, 16777216) ? right :
-                        undefined;
-                if (offendingSymbolOperand) {
-                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
-                    return false;
-                }
-                return true;
-            }
-            function getSuggestedBooleanOperator(operator) {
-                switch (operator) {
-                    case 47:
-                    case 67:
-                        return 52;
-                    case 48:
-                    case 68:
-                        return 33;
-                    case 46:
-                    case 66:
-                        return 51;
-                    default:
-                        return undefined;
-                }
-            }
-            function checkAssignmentOperator(valueType) {
-                if (produceDiagnostics && operator >= 56 && operator <= 68) {
-                    var ok = checkReferenceExpression(left, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property);
-                    if (ok) {
-                        checkTypeAssignableTo(valueType, leftType, left, undefined);
-                    }
-                }
-            }
-            function reportOperatorError() {
-                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
-            }
-        }
-        function isYieldExpressionInClass(node) {
-            var current = node;
-            var parent = node.parent;
-            while (parent) {
-                if (ts.isFunctionLike(parent) && current === parent.body) {
-                    return false;
-                }
-                else if (ts.isClassLike(current)) {
-                    return true;
-                }
-                current = parent;
-                parent = parent.parent;
-            }
-            return false;
-        }
-        function checkYieldExpression(node) {
-            if (produceDiagnostics) {
-                if (!(node.flags & 8388608) || isYieldExpressionInClass(node)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
-                }
-            }
-            if (node.expression) {
-                var func = ts.getContainingFunction(node);
-                if (func && func.asteriskToken) {
-                    var expressionType = checkExpressionCached(node.expression, undefined);
-                    var expressionElementType = void 0;
-                    var nodeIsYieldStar = !!node.asteriskToken;
-                    if (nodeIsYieldStar) {
-                        expressionElementType = checkElementTypeOfIterable(expressionType, node.expression);
-                    }
-                    if (func.type) {
-                        var signatureElementType = getElementTypeOfIterableIterator(getTypeFromTypeNode(func.type)) || anyType;
-                        if (nodeIsYieldStar) {
-                            checkTypeAssignableTo(expressionElementType, signatureElementType, node.expression, undefined);
-                        }
-                        else {
-                            checkTypeAssignableTo(expressionType, signatureElementType, node.expression, undefined);
-                        }
-                    }
-                }
-            }
-            return anyType;
-        }
-        function checkConditionalExpression(node, contextualMapper) {
-            checkExpression(node.condition);
-            var type1 = checkExpression(node.whenTrue, contextualMapper);
-            var type2 = checkExpression(node.whenFalse, contextualMapper);
-            return getUnionType([type1, type2]);
-        }
-        function checkStringLiteralExpression(node) {
-            var contextualType = getContextualType(node);
-            if (contextualType && contextualTypeIsStringLiteralType(contextualType)) {
-                return getStringLiteralTypeForText(node.text);
-            }
-            return stringType;
-        }
-        function checkTemplateExpression(node) {
-            ts.forEach(node.templateSpans, function (templateSpan) {
-                checkExpression(templateSpan.expression);
-            });
-            return stringType;
-        }
-        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
-            var saveContextualType = node.contextualType;
-            node.contextualType = contextualType;
-            var result = checkExpression(node, contextualMapper);
-            node.contextualType = saveContextualType;
-            return result;
-        }
-        function checkExpressionCached(node, contextualMapper) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var saveFlowLoopStart = flowLoopStart;
-                flowLoopStart = flowLoopCount;
-                links.resolvedType = checkExpression(node, contextualMapper);
-                flowLoopStart = saveFlowLoopStart;
-            }
-            return links.resolvedType;
-        }
-        function checkPropertyAssignment(node, contextualMapper) {
-            if (node.name.kind === 140) {
-                checkComputedPropertyName(node.name);
-            }
-            return checkExpression(node.initializer, contextualMapper);
-        }
-        function checkObjectLiteralMethod(node, contextualMapper) {
-            checkGrammarMethod(node);
-            if (node.name.kind === 140) {
-                checkComputedPropertyName(node.name);
-            }
-            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
-        }
-        function instantiateTypeWithSingleGenericCallSignature(node, type, contextualMapper) {
-            if (isInferentialContext(contextualMapper)) {
-                var signature = getSingleCallSignature(type);
-                if (signature && signature.typeParameters) {
-                    var contextualType = getApparentTypeOfContextualType(node);
-                    if (contextualType) {
-                        var contextualSignature = getSingleCallSignature(contextualType);
-                        if (contextualSignature && !contextualSignature.typeParameters) {
-                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper));
-                        }
-                    }
-                }
-            }
-            return type;
-        }
-        function checkExpression(node, contextualMapper) {
-            var type;
-            if (node.kind === 139) {
-                type = checkQualifiedName(node);
-            }
-            else {
-                var uninstantiatedType = checkExpressionWorker(node, contextualMapper);
-                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
-            }
-            if (isConstEnumObjectType(type)) {
-                var ok = (node.parent.kind === 172 && node.parent.expression === node) ||
-                    (node.parent.kind === 173 && node.parent.expression === node) ||
-                    ((node.kind === 69 || node.kind === 139) && isInRightSideOfImportOrExportAssignment(node));
-                if (!ok) {
-                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
-                }
-            }
-            return type;
-        }
-        function checkNumericLiteral(node) {
-            checkGrammarNumericLiteral(node);
-            return numberType;
-        }
-        function checkExpressionWorker(node, contextualMapper) {
-            switch (node.kind) {
-                case 69:
-                    return checkIdentifier(node);
-                case 97:
-                    return checkThisExpression(node);
-                case 95:
-                    return checkSuperExpression(node);
-                case 93:
-                    return nullType;
-                case 99:
-                case 84:
-                    return booleanType;
-                case 8:
-                    return checkNumericLiteral(node);
-                case 189:
-                    return checkTemplateExpression(node);
-                case 9:
-                    return checkStringLiteralExpression(node);
-                case 11:
-                    return stringType;
-                case 10:
-                    return globalRegExpType;
-                case 170:
-                    return checkArrayLiteral(node, contextualMapper);
-                case 171:
-                    return checkObjectLiteral(node, contextualMapper);
-                case 172:
-                    return checkPropertyAccessExpression(node);
-                case 173:
-                    return checkIndexedAccess(node);
-                case 174:
-                case 175:
-                    return checkCallExpression(node);
-                case 176:
-                    return checkTaggedTemplateExpression(node);
-                case 178:
-                    return checkExpression(node.expression, contextualMapper);
-                case 192:
-                    return checkClassExpression(node);
-                case 179:
-                case 180:
-                    return checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-                case 182:
-                    return checkTypeOfExpression(node);
-                case 177:
-                case 195:
-                    return checkAssertion(node);
-                case 196:
-                    return checkNonNullAssertion(node);
-                case 181:
-                    return checkDeleteExpression(node);
-                case 183:
-                    return checkVoidExpression(node);
-                case 184:
-                    return checkAwaitExpression(node);
-                case 185:
-                    return checkPrefixUnaryExpression(node);
-                case 186:
-                    return checkPostfixUnaryExpression(node);
-                case 187:
-                    return checkBinaryExpression(node, contextualMapper);
-                case 188:
-                    return checkConditionalExpression(node, contextualMapper);
-                case 191:
-                    return checkSpreadElementExpression(node, contextualMapper);
-                case 193:
-                    return undefinedType;
-                case 190:
-                    return checkYieldExpression(node);
-                case 248:
-                    return checkJsxExpression(node);
-                case 241:
-                    return checkJsxElement(node);
-                case 242:
-                    return checkJsxSelfClosingElement(node);
-                case 243:
-                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
-            }
-            return unknownType;
-        }
-        function checkTypeParameter(node) {
-            if (node.expression) {
-                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
-            }
-            checkSourceElement(node.constraint);
-            getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node)));
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
-            }
-        }
-        function checkParameter(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkVariableLikeDeclaration(node);
-            var func = ts.getContainingFunction(node);
-            if (node.flags & 92) {
-                func = ts.getContainingFunction(node);
-                if (!(func.kind === 148 && ts.nodeIsPresent(func.body))) {
-                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
-                }
-            }
-            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
-                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
-            }
-            if (node.name.text === "this") {
-                if (ts.indexOf(func.parameters, node) !== 0) {
-                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
-                }
-                if (func.kind === 148 || func.kind === 152 || func.kind === 157) {
-                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
-                }
-            }
-            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
-                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
-            }
-        }
-        function isSyntacticallyValidGenerator(node) {
-            if (!node.asteriskToken || !node.body) {
-                return false;
-            }
-            return node.kind === 147 ||
-                node.kind === 220 ||
-                node.kind === 179;
-        }
-        function getTypePredicateParameterIndex(parameterList, parameter) {
-            if (parameterList) {
-                for (var i = 0; i < parameterList.length; i++) {
-                    var param = parameterList[i];
-                    if (param.name.kind === 69 &&
-                        param.name.text === parameter.text) {
-                        return i;
-                    }
-                }
-            }
-            return -1;
-        }
-        function checkTypePredicate(node) {
-            var parent = getTypePredicateParent(node);
-            if (!parent) {
-                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
-                return;
-            }
-            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
-            if (!typePredicate) {
-                return;
-            }
-            var parameterName = node.parameterName;
-            if (ts.isThisTypePredicate(typePredicate)) {
-                getTypeFromThisTypeNode(parameterName);
-            }
-            else {
-                if (typePredicate.parameterIndex >= 0) {
-                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
-                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
-                    }
-                    else {
-                        var leadingError = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
-                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, undefined, leadingError);
-                    }
-                }
-                else if (parameterName) {
-                    var hasReportedError = false;
-                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
-                        var name_14 = _a[_i].name;
-                        if (ts.isBindingPattern(name_14) &&
-                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_14, parameterName, typePredicate.parameterName)) {
-                            hasReportedError = true;
-                            break;
-                        }
-                    }
-                    if (!hasReportedError) {
-                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
-                    }
-                }
-            }
-        }
-        function getTypePredicateParent(node) {
-            switch (node.parent.kind) {
-                case 180:
-                case 151:
-                case 220:
-                case 179:
-                case 156:
-                case 147:
-                case 146:
-                    var parent_10 = node.parent;
-                    if (node === parent_10.type) {
-                        return parent_10;
-                    }
-            }
-        }
-        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
-            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
-                var name_15 = _a[_i].name;
-                if (name_15.kind === 69 &&
-                    name_15.text === predicateVariableName) {
-                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
-                    return true;
-                }
-                else if (name_15.kind === 168 ||
-                    name_15.kind === 167) {
-                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_15, predicateVariableNode, predicateVariableName)) {
-                        return true;
-                    }
-                }
-            }
-        }
-        function checkSignatureDeclaration(node) {
-            if (node.kind === 153) {
-                checkGrammarIndexSignature(node);
-            }
-            else if (node.kind === 156 || node.kind === 220 || node.kind === 157 ||
-                node.kind === 151 || node.kind === 148 ||
-                node.kind === 152) {
-                checkGrammarFunctionLikeDeclaration(node);
-            }
-            checkTypeParameters(node.typeParameters);
-            ts.forEach(node.parameters, checkParameter);
-            if (node.type) {
-                checkSourceElement(node.type);
-            }
-            if (produceDiagnostics) {
-                checkCollisionWithArgumentsInGeneratedCode(node);
-                if (compilerOptions.noImplicitAny && !node.type) {
-                    switch (node.kind) {
-                        case 152:
-                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
-                        case 151:
-                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
-                    }
-                }
-                if (node.type) {
-                    if (languageVersion >= 2 && isSyntacticallyValidGenerator(node)) {
-                        var returnType = getTypeFromTypeNode(node.type);
-                        if (returnType === voidType) {
-                            error(node.type, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
-                        }
-                        else {
-                            var generatorElementType = getElementTypeOfIterableIterator(returnType) || anyType;
-                            var iterableIteratorInstantiation = createIterableIteratorType(generatorElementType);
-                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, node.type);
-                        }
-                    }
-                    else if (ts.isAsyncFunctionLike(node)) {
-                        checkAsyncFunctionReturnType(node);
-                    }
-                }
-            }
-        }
-        function checkClassForDuplicateDeclarations(node) {
-            var getter = 1, setter = 2, property = getter | setter;
-            var instanceNames = {};
-            var staticNames = {};
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind === 148) {
-                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
-                        var param = _c[_b];
-                        if (ts.isParameterPropertyDeclaration(param)) {
-                            addName(instanceNames, param.name, param.name.text, property);
-                        }
-                    }
-                }
-                else {
-                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113; });
-                    var names = static ? staticNames : instanceNames;
-                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
-                    if (memberName) {
-                        switch (member.kind) {
-                            case 149:
-                                addName(names, member.name, memberName, getter);
-                                break;
-                            case 150:
-                                addName(names, member.name, memberName, setter);
-                                break;
-                            case 145:
-                                addName(names, member.name, memberName, property);
-                                break;
-                        }
-                    }
-                }
-            }
-            function addName(names, location, name, meaning) {
-                if (ts.hasProperty(names, name)) {
-                    var prev = names[name];
-                    if (prev & meaning) {
-                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
-                    }
-                    else {
-                        names[name] = prev | meaning;
-                    }
-                }
-                else {
-                    names[name] = meaning;
-                }
-            }
-        }
-        function checkObjectTypeForDuplicateDeclarations(node) {
-            var names = {};
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind == 144) {
-                    var memberName = void 0;
-                    switch (member.name.kind) {
-                        case 9:
-                        case 8:
-                        case 69:
-                            memberName = member.name.text;
-                            break;
-                        default:
-                            continue;
-                    }
-                    if (ts.hasProperty(names, memberName)) {
-                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
-                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
-                    }
-                    else {
-                        names[memberName] = true;
-                    }
-                }
-            }
-        }
-        function checkTypeForDuplicateIndexSignatures(node) {
-            if (node.kind === 222) {
-                var nodeSymbol = getSymbolOfNode(node);
-                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
-                    return;
-                }
-            }
-            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
-            if (indexSymbol) {
-                var seenNumericIndexer = false;
-                var seenStringIndexer = false;
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var declaration = decl;
-                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
-                        switch (declaration.parameters[0].type.kind) {
-                            case 132:
-                                if (!seenStringIndexer) {
-                                    seenStringIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
-                                }
-                                break;
-                            case 130:
-                                if (!seenNumericIndexer) {
-                                    seenNumericIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
-                                }
-                                break;
-                        }
-                    }
-                }
-            }
-        }
-        function checkPropertyDeclaration(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
-            checkVariableLikeDeclaration(node);
-        }
-        function checkMethodDeclaration(node) {
-            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
-            checkFunctionOrMethodDeclaration(node);
-            if (node.flags & 128 && node.body) {
-                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
-            }
-        }
-        function checkConstructorDeclaration(node) {
-            checkSignatureDeclaration(node);
-            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
-            checkSourceElement(node.body);
-            var symbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
-            if (node === firstDeclaration) {
-                checkFunctionOrConstructorSymbol(symbol);
-            }
-            if (ts.nodeIsMissing(node.body)) {
-                return;
-            }
-            if (!produceDiagnostics) {
-                return;
-            }
-            function containsSuperCallAsComputedPropertyName(n) {
-                return n.name && containsSuperCall(n.name);
-            }
-            function containsSuperCall(n) {
-                if (ts.isSuperCallExpression(n)) {
-                    return true;
-                }
-                else if (ts.isFunctionLike(n)) {
-                    return false;
-                }
-                else if (ts.isClassLike(n)) {
-                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
-                }
-                return ts.forEachChild(n, containsSuperCall);
-            }
-            function markThisReferencesAsErrors(n) {
-                if (n.kind === 97) {
-                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
-                }
-                else if (n.kind !== 179 && n.kind !== 220) {
-                    ts.forEachChild(n, markThisReferencesAsErrors);
-                }
-            }
-            function isInstancePropertyWithInitializer(n) {
-                return n.kind === 145 &&
-                    !(n.flags & 32) &&
-                    !!n.initializer;
-            }
-            var containingClassDecl = node.parent;
-            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
-                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
-                var superCall = getSuperCallInConstructor(node);
-                if (superCall) {
-                    if (classExtendsNull) {
-                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
-                    }
-                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
-                        ts.forEach(node.parameters, function (p) { return p.flags & 92; });
-                    if (superCallShouldBeFirst) {
-                        var statements = node.body.statements;
-                        var superCallStatement = void 0;
-                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
-                            var statement = statements_2[_i];
-                            if (statement.kind === 202 && ts.isSuperCallExpression(statement.expression)) {
-                                superCallStatement = statement;
-                                break;
-                            }
-                            if (!ts.isPrologueDirective(statement)) {
-                                break;
-                            }
-                        }
-                        if (!superCallStatement) {
-                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
-                        }
-                    }
-                }
-                else if (!classExtendsNull) {
-                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
-                }
-            }
-        }
-        function checkAccessorDeclaration(node) {
-            if (produceDiagnostics) {
-                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
-                checkDecorators(node);
-                checkSignatureDeclaration(node);
-                if (node.kind === 149) {
-                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 32768)) {
-                        if (node.flags & 65536) {
-                            if (compilerOptions.noImplicitReturns) {
-                                error(node.name, ts.Diagnostics.Not_all_code_paths_return_a_value);
-                            }
-                        }
-                        else {
-                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
-                        }
-                    }
-                }
-                if (node.name.kind === 140) {
-                    checkComputedPropertyName(node.name);
-                }
-                if (!ts.hasDynamicName(node)) {
-                    var otherKind = node.kind === 149 ? 150 : 149;
-                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
-                    if (otherAccessor) {
-                        if (((node.flags & 28) !== (otherAccessor.flags & 28))) {
-                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
-                        }
-                        if (((node.flags & 128) !== (otherAccessor.flags & 128))) {
-                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
-                        }
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorThisType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
-                    }
-                }
-                getTypeOfAccessors(getSymbolOfNode(node));
-            }
-            if (node.parent.kind !== 171) {
-                checkSourceElement(node.body);
-            }
-            else {
-                checkNodeDeferred(node);
-            }
-        }
-        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
-            var firstType = getAnnotatedType(first);
-            var secondType = getAnnotatedType(second);
-            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
-                error(first, message);
-            }
-        }
-        function checkAccessorDeferred(node) {
-            checkSourceElement(node.body);
-        }
-        function checkMissingDeclaration(node) {
-            checkDecorators(node);
-        }
-        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
-            var typeArguments;
-            var mapper;
-            var result = true;
-            for (var i = 0; i < typeParameters.length; i++) {
-                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                if (constraint) {
-                    if (!typeArguments) {
-                        typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
-                        mapper = createTypeMapper(typeParameters, typeArguments);
-                    }
-                    var typeArgument = typeArguments[i];
-                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
-                }
-            }
-            return result;
-        }
-        function checkTypeReferenceNode(node) {
-            checkGrammarTypeArguments(node, node.typeArguments);
-            var type = getTypeFromTypeReference(node);
-            if (type !== unknownType && node.typeArguments) {
-                ts.forEach(node.typeArguments, checkSourceElement);
-                if (produceDiagnostics) {
-                    var symbol = getNodeLinks(node).resolvedSymbol;
-                    var typeParameters = symbol.flags & 524288 ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
-                    checkTypeArgumentConstraints(typeParameters, node.typeArguments);
-                }
-            }
-        }
-        function checkTypeQuery(node) {
-            getTypeFromTypeQueryNode(node);
-        }
-        function checkTypeLiteral(node) {
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-                checkObjectTypeForDuplicateDeclarations(node);
-            }
-        }
-        function checkArrayType(node) {
-            checkSourceElement(node.elementType);
-        }
-        function checkTupleType(node) {
-            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
-            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
-                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
-            }
-            ts.forEach(node.elementTypes, checkSourceElement);
-        }
-        function checkUnionOrIntersectionType(node) {
-            ts.forEach(node.types, checkSourceElement);
-        }
-        function isPrivateWithinAmbient(node) {
-            return (node.flags & 8) && ts.isInAmbientContext(node);
-        }
-        function getEffectiveDeclarationFlags(n, flagsToCheck) {
-            var flags = ts.getCombinedNodeFlags(n);
-            if (n.parent.kind !== 222 &&
-                n.parent.kind !== 221 &&
-                n.parent.kind !== 192 &&
-                ts.isInAmbientContext(n)) {
-                if (!(flags & 2)) {
-                    flags |= 1;
-                }
-                flags |= 2;
-            }
-            return flags & flagsToCheck;
-        }
-        function checkFunctionOrConstructorSymbol(symbol) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            function getCanonicalOverload(overloads, implementation) {
-                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
-                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
-            }
-            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
-                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
-                if (someButNotAllOverloadFlags !== 0) {
-                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
-                    ts.forEach(overloads, function (o) {
-                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
-                        if (deviation & 1) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
-                        }
-                        else if (deviation & 2) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
-                        }
-                        else if (deviation & (8 | 16)) {
-                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
-                        }
-                        else if (deviation & 128) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
-                        }
-                    });
-                }
-            }
-            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
-                if (someHaveQuestionToken !== allHaveQuestionToken) {
-                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
-                    ts.forEach(overloads, function (o) {
-                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
-                        if (deviation) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
-                        }
-                    });
-                }
-            }
-            var flagsToCheck = 1 | 2 | 8 | 16 | 128;
-            var someNodeFlags = 0;
-            var allNodeFlags = flagsToCheck;
-            var someHaveQuestionToken = false;
-            var allHaveQuestionToken = true;
-            var hasOverloads = false;
-            var bodyDeclaration;
-            var lastSeenNonAmbientDeclaration;
-            var previousDeclaration;
-            var declarations = symbol.declarations;
-            var isConstructor = (symbol.flags & 16384) !== 0;
-            function reportImplementationExpectedError(node) {
-                if (node.name && ts.nodeIsMissing(node.name)) {
-                    return;
-                }
-                var seen = false;
-                var subsequentNode = ts.forEachChild(node.parent, function (c) {
-                    if (seen) {
-                        return c;
-                    }
-                    else {
-                        seen = c === node;
-                    }
-                });
-                if (subsequentNode && subsequentNode.pos === node.end) {
-                    if (subsequentNode.kind === node.kind) {
-                        var errorNode_1 = subsequentNode.name || subsequentNode;
-                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
-                            var reportError = (node.kind === 147 || node.kind === 146) &&
-                                (node.flags & 32) !== (subsequentNode.flags & 32);
-                            if (reportError) {
-                                var diagnostic = node.flags & 32 ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
-                                error(errorNode_1, diagnostic);
-                            }
-                            return;
-                        }
-                        else if (ts.nodeIsPresent(subsequentNode.body)) {
-                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
-                            return;
-                        }
-                    }
-                }
-                var errorNode = node.name || node;
-                if (isConstructor) {
-                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
-                }
-                else {
-                    if (node.flags & 128) {
-                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
-                    }
-                    else {
-                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
-                    }
-                }
-            }
-            var isExportSymbolInsideModule = symbol.parent && symbol.parent.flags & 1536;
-            var duplicateFunctionDeclaration = false;
-            var multipleConstructorImplementation = false;
-            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
-                var current = declarations_4[_i];
-                var node = current;
-                var inAmbientContext = ts.isInAmbientContext(node);
-                var inAmbientContextOrInterface = node.parent.kind === 222 || node.parent.kind === 159 || inAmbientContext;
-                if (inAmbientContextOrInterface) {
-                    previousDeclaration = undefined;
-                }
-                if (node.kind === 220 || node.kind === 147 || node.kind === 146 || node.kind === 148) {
-                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
-                    someNodeFlags |= currentNodeFlags;
-                    allNodeFlags &= currentNodeFlags;
-                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
-                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
-                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
-                        if (isConstructor) {
-                            multipleConstructorImplementation = true;
-                        }
-                        else {
-                            duplicateFunctionDeclaration = true;
-                        }
-                    }
-                    else if (!isExportSymbolInsideModule && previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
-                        reportImplementationExpectedError(previousDeclaration);
-                    }
-                    if (ts.nodeIsPresent(node.body)) {
-                        if (!bodyDeclaration) {
-                            bodyDeclaration = node;
-                        }
-                    }
-                    else {
-                        hasOverloads = true;
-                    }
-                    previousDeclaration = node;
-                    if (!inAmbientContextOrInterface) {
-                        lastSeenNonAmbientDeclaration = node;
-                    }
-                }
-            }
-            if (multipleConstructorImplementation) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
-                });
-            }
-            if (duplicateFunctionDeclaration) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
-                });
-            }
-            if (!isExportSymbolInsideModule && lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
-                !(lastSeenNonAmbientDeclaration.flags & 128) && !lastSeenNonAmbientDeclaration.questionToken) {
-                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
-            }
-            if (hasOverloads) {
-                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
-                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
-                if (bodyDeclaration) {
-                    var signatures = getSignaturesOfSymbol(symbol);
-                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
-                    for (var _a = 0, signatures_3 = signatures; _a < signatures_3.length; _a++) {
-                        var signature = signatures_3[_a];
-                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
-                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
-                            break;
-                        }
-                    }
-                }
-            }
-        }
-        function checkExportsOnMergedDeclarations(node) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            var symbol = node.localSymbol;
-            if (!symbol) {
-                symbol = getSymbolOfNode(node);
-                if (!(symbol.flags & 7340032)) {
-                    return;
-                }
-            }
-            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
-                return;
-            }
-            var exportedDeclarationSpaces = 0;
-            var nonExportedDeclarationSpaces = 0;
-            var defaultExportedDeclarationSpaces = 0;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var d = _a[_i];
-                var declarationSpaces = getDeclarationSpaces(d);
-                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 | 512);
-                if (effectiveDeclarationFlags & 1) {
-                    if (effectiveDeclarationFlags & 512) {
-                        defaultExportedDeclarationSpaces |= declarationSpaces;
-                    }
-                    else {
-                        exportedDeclarationSpaces |= declarationSpaces;
-                    }
-                }
-                else {
-                    nonExportedDeclarationSpaces |= declarationSpaces;
-                }
-            }
-            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
-            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
-                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
-                    var d = _c[_b];
-                    var declarationSpaces = getDeclarationSpaces(d);
-                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
-                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
-                    }
-                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
-                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
-                    }
-                }
-            }
-            function getDeclarationSpaces(d) {
-                switch (d.kind) {
-                    case 222:
-                        return 2097152;
-                    case 225:
-                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0
-                            ? 4194304 | 1048576
-                            : 4194304;
-                    case 221:
-                    case 224:
-                        return 2097152 | 1048576;
-                    case 229:
-                        var result_1 = 0;
-                        var target = resolveAlias(getSymbolOfNode(d));
-                        ts.forEach(target.declarations, function (d) { result_1 |= getDeclarationSpaces(d); });
-                        return result_1;
-                    default:
-                        return 1048576;
-                }
-            }
-        }
-        function checkNonThenableType(type, location, message) {
-            type = getWidenedType(type);
-            if (!isTypeAny(type) && isTypeAssignableTo(type, getGlobalThenableType())) {
-                if (location) {
-                    if (!message) {
-                        message = ts.Diagnostics.Operand_for_await_does_not_have_a_valid_callable_then_member;
-                    }
-                    error(location, message);
-                }
-                return unknownType;
-            }
-            return type;
-        }
-        function getPromisedType(promise) {
-            if (promise.flags & 1) {
-                return undefined;
-            }
-            if ((promise.flags & 4096) && promise.target === tryGetGlobalPromiseType()) {
-                return promise.typeArguments[0];
-            }
-            var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType();
-            if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) {
-                return undefined;
-            }
-            var thenFunction = getTypeOfPropertyOfType(promise, "then");
-            if (thenFunction && (thenFunction.flags & 1)) {
-                return undefined;
-            }
-            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0) : emptyArray;
-            if (thenSignatures.length === 0) {
-                return undefined;
-            }
-            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072);
-            if (onfulfilledParameterType.flags & 1) {
-                return undefined;
-            }
-            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0);
-            if (onfulfilledParameterSignatures.length === 0) {
-                return undefined;
-            }
-            var valueParameterType = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature));
-            return valueParameterType;
-        }
-        function getTypeOfFirstParameterOfSignature(signature) {
-            return getTypeAtPosition(signature, 0);
-        }
-        function getAwaitedType(type) {
-            return checkAwaitedType(type, undefined, undefined);
-        }
-        function checkAwaitedType(type, location, message) {
-            return checkAwaitedTypeWorker(type);
-            function checkAwaitedTypeWorker(type) {
-                if (type.flags & 16384) {
-                    var types = [];
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var constituentType = _a[_i];
-                        types.push(checkAwaitedTypeWorker(constituentType));
-                    }
-                    return getUnionType(types);
-                }
-                else {
-                    var promisedType = getPromisedType(type);
-                    if (promisedType === undefined) {
-                        return checkNonThenableType(type, location, message);
-                    }
-                    else {
-                        if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
-                            if (location) {
-                                error(location, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method, symbolToString(type.symbol));
-                            }
-                            return unknownType;
-                        }
-                        awaitedTypeStack.push(type.id);
-                        var awaitedType = checkAwaitedTypeWorker(promisedType);
-                        awaitedTypeStack.pop();
-                        return awaitedType;
-                    }
-                }
-            }
-        }
-        function checkCorrectPromiseType(returnType, location) {
-            if (returnType === unknownType) {
-                return unknownType;
-            }
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType === emptyGenericType
-                || globalPromiseType === getTargetType(returnType)) {
-                return checkAwaitedType(returnType, location, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-            }
-            error(location, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
-            return unknownType;
-        }
-        function checkAsyncFunctionReturnType(node) {
-            if (languageVersion >= 2) {
-                var returnType = getTypeFromTypeNode(node.type);
-                return checkCorrectPromiseType(returnType, node.type);
-            }
-            var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType();
-            if (globalPromiseConstructorLikeType === emptyObjectType) {
-                return unknownType;
-            }
-            var promiseType = getTypeFromTypeNode(node.type);
-            if (promiseType === unknownType && compilerOptions.isolatedModules) {
-                return unknownType;
-            }
-            var promiseConstructor = getNodeLinks(node.type).resolvedSymbol;
-            if (!promiseConstructor || !symbolIsValue(promiseConstructor)) {
-                var typeName = promiseConstructor
-                    ? symbolToString(promiseConstructor)
-                    : typeToString(promiseType);
-                error(node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName);
-                return unknownType;
-            }
-            checkReturnTypeAnnotationAsExpression(node);
-            var promiseConstructorType = getTypeOfSymbol(promiseConstructor);
-            if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) {
-                return unknownType;
-            }
-            var promiseName = ts.getEntityNameFromTypeNode(node.type);
-            var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName);
-            var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455);
-            if (rootSymbol) {
-                error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor));
-                return unknownType;
-            }
-            return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-        }
-        function checkDecorator(node) {
-            var signature = getResolvedSignature(node);
-            var returnType = getReturnTypeOfSignature(signature);
-            if (returnType.flags & 1) {
-                return;
-            }
-            var expectedReturnType;
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            var errorInfo;
-            switch (node.parent.kind) {
-                case 221:
-                    var classSymbol = getSymbolOfNode(node.parent);
-                    var classConstructorType = getTypeOfSymbol(classSymbol);
-                    expectedReturnType = getUnionType([classConstructorType, voidType]);
-                    break;
-                case 142:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 145:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 147:
-                case 149:
-                case 150:
-                    var methodType = getTypeOfNode(node.parent);
-                    var descriptorType = createTypedPropertyDescriptorType(methodType);
-                    expectedReturnType = getUnionType([descriptorType, voidType]);
-                    break;
-            }
-            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
-        }
-        function checkTypeNodeAsExpression(node) {
-            if (node && node.kind === 155) {
-                var root = getFirstIdentifier(node.typeName);
-                var meaning = root.parent.kind === 155 ? 793056 : 1536;
-                var rootSymbol = resolveName(root, root.text, meaning | 8388608, undefined, undefined);
-                if (rootSymbol && rootSymbol.flags & 8388608) {
-                    var aliasTarget = resolveAlias(rootSymbol);
-                    if (aliasTarget.flags & 107455 && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
-                        markAliasSymbolAsReferenced(rootSymbol);
-                    }
-                }
-            }
-        }
-        function checkTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        function checkReturnTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        function checkParameterTypeAnnotationsAsExpressions(node) {
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                checkTypeAnnotationAsExpression(parameter);
-            }
-        }
-        function checkDecorators(node) {
-            if (!node.decorators) {
-                return;
-            }
-            if (!ts.nodeCanBeDecorated(node)) {
-                return;
-            }
-            if (!compilerOptions.experimentalDecorators) {
-                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
-            }
-            if (compilerOptions.emitDecoratorMetadata) {
-                switch (node.kind) {
-                    case 221:
-                        var constructor = ts.getFirstConstructorWithBody(node);
-                        if (constructor) {
-                            checkParameterTypeAnnotationsAsExpressions(constructor);
-                        }
-                        break;
-                    case 147:
-                    case 149:
-                    case 150:
-                        checkParameterTypeAnnotationsAsExpressions(node);
-                        checkReturnTypeAnnotationAsExpression(node);
-                        break;
-                    case 145:
-                    case 142:
-                        checkTypeAnnotationAsExpression(node);
-                        break;
-                }
-            }
-            ts.forEach(node.decorators, checkDecorator);
-        }
-        function checkFunctionDeclaration(node) {
-            if (produceDiagnostics) {
-                checkFunctionOrMethodDeclaration(node) || checkGrammarForGenerator(node);
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-        }
-        function checkFunctionOrMethodDeclaration(node) {
-            checkDecorators(node);
-            checkSignatureDeclaration(node);
-            var isAsync = ts.isAsyncFunctionLike(node);
-            if (node.name && node.name.kind === 140) {
-                checkComputedPropertyName(node.name);
-            }
-            if (!ts.hasDynamicName(node)) {
-                var symbol = getSymbolOfNode(node);
-                var localSymbol = node.localSymbol || symbol;
-                var firstDeclaration = ts.forEach(localSymbol.declarations, function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
-                    declaration : undefined; });
-                if (node === firstDeclaration) {
-                    checkFunctionOrConstructorSymbol(localSymbol);
-                }
-                if (symbol.parent) {
-                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
-                        checkFunctionOrConstructorSymbol(symbol);
-                    }
-                }
-            }
-            checkSourceElement(node.body);
-            if (!node.asteriskToken) {
-                var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (produceDiagnostics && !node.type) {
-                if (compilerOptions.noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
-                    reportImplicitAnyError(node, anyType);
-                }
-                if (node.asteriskToken && ts.nodeIsPresent(node.body)) {
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
-                }
-            }
-        }
-        function checkBlock(node) {
-            if (node.kind === 199) {
-                checkGrammarStatementInAmbientContext(node);
-            }
-            ts.forEach(node.statements, checkSourceElement);
-        }
-        function checkCollisionWithArgumentsInGeneratedCode(node) {
-            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
-                return;
-            }
-            ts.forEach(node.parameters, function (p) {
-                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
-                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
-                }
-            });
-        }
-        function needCollisionCheckForIdentifier(node, identifier, name) {
-            if (!(identifier && identifier.text === name)) {
-                return false;
-            }
-            if (node.kind === 145 ||
-                node.kind === 144 ||
-                node.kind === 147 ||
-                node.kind === 146 ||
-                node.kind === 149 ||
-                node.kind === 150) {
-                return false;
-            }
-            if (ts.isInAmbientContext(node)) {
-                return false;
-            }
-            var root = ts.getRootDeclaration(node);
-            if (root.kind === 142 && ts.nodeIsMissing(root.parent.body)) {
-                return false;
-            }
-            return true;
-        }
-        function checkCollisionWithCapturedThisVariable(node, name) {
-            if (needCollisionCheckForIdentifier(node, name, "_this")) {
-                potentialThisCollisions.push(node);
-            }
-        }
-        function checkIfThisIsCapturedInEnclosingScope(node) {
-            var current = node;
-            while (current) {
-                if (getNodeCheckFlags(current) & 4) {
-                    var isDeclaration_1 = node.kind !== 69;
-                    if (isDeclaration_1) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
-                    }
-                    else {
-                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
-                    }
-                    return;
-                }
-                current = current.parent;
-            }
-        }
-        function checkCollisionWithCapturedSuperVariable(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
-                return;
-            }
-            var enclosingClass = ts.getContainingClass(node);
-            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
-                return;
-            }
-            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
-                var isDeclaration_2 = node.kind !== 69;
-                if (isDeclaration_2) {
-                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
-                }
-                else {
-                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
-                }
-            }
-        }
-        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
-                return;
-            }
-            if (node.kind === 225 && ts.getModuleInstanceState(node) !== 1) {
-                return;
-            }
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 && ts.isExternalOrCommonJsModule(parent)) {
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
-            }
-        }
-        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "Promise")) {
-                return;
-            }
-            if (node.kind === 225 && ts.getModuleInstanceState(node) !== 1) {
-                return;
-            }
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 && ts.isExternalOrCommonJsModule(parent) && parent.flags & 2097152) {
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
-            }
-        }
-        function checkVarDeclaredNamesNotShadowed(node) {
-            if ((ts.getCombinedNodeFlags(node) & 3072) !== 0 || ts.isParameterDeclaration(node)) {
-                return;
-            }
-            if (node.kind === 218 && !node.initializer) {
-                return;
-            }
-            var symbol = getSymbolOfNode(node);
-            if (symbol.flags & 1) {
-                var localDeclarationSymbol = resolveName(node, node.name.text, 3, undefined, undefined);
-                if (localDeclarationSymbol &&
-                    localDeclarationSymbol !== symbol &&
-                    localDeclarationSymbol.flags & 2) {
-                    if (getDeclarationFlagsFromSymbol(localDeclarationSymbol) & 3072) {
-                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 219);
-                        var container = varDeclList.parent.kind === 200 && varDeclList.parent.parent
-                            ? varDeclList.parent.parent
-                            : undefined;
-                        var namesShareScope = container &&
-                            (container.kind === 199 && ts.isFunctionLike(container.parent) ||
-                                container.kind === 226 ||
-                                container.kind === 225 ||
-                                container.kind === 256);
-                        if (!namesShareScope) {
-                            var name_16 = symbolToString(localDeclarationSymbol);
-                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_16, name_16);
-                        }
-                    }
-                }
-            }
-        }
-        function checkParameterInitializer(node) {
-            if (ts.getRootDeclaration(node).kind !== 142) {
-                return;
-            }
-            var func = ts.getContainingFunction(node);
-            visit(node.initializer);
-            function visit(n) {
-                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
-                    return;
-                }
-                if (n.kind === 172) {
-                    return visit(n.expression);
-                }
-                else if (n.kind === 69) {
-                    var symbol = resolveName(n, n.text, 107455 | 8388608, undefined, undefined);
-                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
-                        return;
-                    }
-                    if (symbol.valueDeclaration === node) {
-                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
-                        return;
-                    }
-                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (enclosingContainer === func) {
-                        if (symbol.valueDeclaration.kind === 142) {
-                            if (symbol.valueDeclaration.pos < node.pos) {
-                                return;
-                            }
-                            var current = n;
-                            while (current !== node.initializer) {
-                                if (ts.isFunctionLike(current.parent)) {
-                                    return;
-                                }
-                                if (current.parent.kind === 145 &&
-                                    !(current.parent.flags & 32) &&
-                                    ts.isClassLike(current.parent.parent)) {
-                                    return;
-                                }
-                                current = current.parent;
-                            }
-                        }
-                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
-                    }
-                }
-                else {
-                    return ts.forEachChild(n, visit);
-                }
-            }
-        }
-        function checkVariableLikeDeclaration(node) {
-            checkDecorators(node);
-            checkSourceElement(node.type);
-            if (node.name.kind === 140) {
-                checkComputedPropertyName(node.name);
-                if (node.initializer) {
-                    checkExpressionCached(node.initializer);
-                }
-            }
-            if (node.kind === 169) {
-                if (node.propertyName && node.propertyName.kind === 140) {
-                    checkComputedPropertyName(node.propertyName);
-                }
-                var parent_11 = node.parent.parent;
-                var parentType = getTypeForBindingElementParent(parent_11);
-                var name_17 = node.propertyName || node.name;
-                var property = getPropertyOfType(parentType, getTextOfPropertyName(name_17));
-                if (parent_11.initializer && property && getParentOfSymbol(property)) {
-                    checkClassPropertyAccess(parent_11, parent_11.initializer, parentType, property);
-                }
-            }
-            if (ts.isBindingPattern(node.name)) {
-                ts.forEach(node.name.elements, checkSourceElement);
-            }
-            if (node.initializer && ts.getRootDeclaration(node).kind === 142 && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
-                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
-                return;
-            }
-            if (ts.isBindingPattern(node.name)) {
-                if (node.initializer && node.parent.parent.kind !== 207) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, undefined);
-                    checkParameterInitializer(node);
-                }
-                return;
-            }
-            var symbol = getSymbolOfNode(node);
-            var type = getTypeOfVariableOrParameterOrProperty(symbol);
-            if (node === symbol.valueDeclaration) {
-                if (node.initializer && node.parent.parent.kind !== 207) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, undefined);
-                    checkParameterInitializer(node);
-                }
-            }
-            else {
-                var declarationType = getWidenedTypeForVariableLikeDeclaration(node);
-                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
-                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
-                }
-                if (node.initializer) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, undefined);
-                }
-                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
-                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
-                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
-                }
-            }
-            if (node.kind !== 145 && node.kind !== 144) {
-                checkExportsOnMergedDeclarations(node);
-                if (node.kind === 218 || node.kind === 169) {
-                    checkVarDeclaredNamesNotShadowed(node);
-                }
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-        }
-        function areDeclarationFlagsIdentical(left, right) {
-            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
-                return false;
-            }
-            var interestingFlags = 8 |
-                16 |
-                256 |
-                128 |
-                64 |
-                32;
-            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
-        }
-        function checkVariableDeclaration(node) {
-            checkGrammarVariableDeclaration(node);
-            return checkVariableLikeDeclaration(node);
-        }
-        function checkBindingElement(node) {
-            checkGrammarBindingElement(node);
-            return checkVariableLikeDeclaration(node);
-        }
-        function checkVariableStatement(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
-            ts.forEach(node.declarationList.declarations, checkSourceElement);
-        }
-        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
-            if (node.modifiers && node.parent.kind === 171) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    if (node.modifiers.length > 1) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                }
-                else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                }
-            }
-        }
-        function checkExpressionStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-        }
-        function checkIfStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.thenStatement);
-            if (node.thenStatement.kind === 201) {
-                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
-            }
-            checkSourceElement(node.elseStatement);
-        }
-        function checkDoStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkSourceElement(node.statement);
-            checkExpression(node.expression);
-        }
-        function checkWhileStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.statement);
-        }
-        function checkForStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.initializer && node.initializer.kind === 219) {
-                    checkGrammarVariableDeclarationList(node.initializer);
-                }
-            }
-            if (node.initializer) {
-                if (node.initializer.kind === 219) {
-                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
-                }
-                else {
-                    checkExpression(node.initializer);
-                }
-            }
-            if (node.condition)
-                checkExpression(node.condition);
-            if (node.incrementor)
-                checkExpression(node.incrementor);
-            checkSourceElement(node.statement);
-        }
-        function checkForOfStatement(node) {
-            checkGrammarForInOrForOfStatement(node);
-            if (node.initializer.kind === 219) {
-                checkForInOrForOfVariableDeclaration(node);
-            }
-            else {
-                var varExpr = node.initializer;
-                var iteratedType = checkRightHandSideOfForOf(node.expression);
-                if (varExpr.kind === 170 || varExpr.kind === 171) {
-                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
-                }
-                else {
-                    var leftType = checkExpression(varExpr);
-                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_of_statement, ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property);
-                    if (iteratedType) {
-                        checkTypeAssignableTo(iteratedType, leftType, varExpr, undefined);
-                    }
-                }
-            }
-            checkSourceElement(node.statement);
-        }
-        function checkForInStatement(node) {
-            checkGrammarForInOrForOfStatement(node);
-            if (node.initializer.kind === 219) {
-                var variable = node.initializer.declarations[0];
-                if (variable && ts.isBindingPattern(variable.name)) {
-                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
-                }
-                checkForInOrForOfVariableDeclaration(node);
-            }
-            else {
-                var varExpr = node.initializer;
-                var leftType = checkExpression(varExpr);
-                if (varExpr.kind === 170 || varExpr.kind === 171) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
-                }
-                else if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258)) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
-                }
-                else {
-                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_in_statement, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property);
-                }
-            }
-            var rightType = checkNonNullExpression(node.expression);
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 | 512)) {
-                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            checkSourceElement(node.statement);
-        }
-        function checkForInOrForOfVariableDeclaration(iterationStatement) {
-            var variableDeclarationList = iterationStatement.initializer;
-            if (variableDeclarationList.declarations.length >= 1) {
-                var decl = variableDeclarationList.declarations[0];
-                checkVariableDeclaration(decl);
-            }
-        }
-        function checkRightHandSideOfForOf(rhsExpression) {
-            var expressionType = checkNonNullExpression(rhsExpression);
-            return checkIteratedTypeOrElementType(expressionType, rhsExpression, true);
-        }
-        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput) {
-            if (isTypeAny(inputType)) {
-                return inputType;
-            }
-            if (languageVersion >= 2) {
-                return checkElementTypeOfIterable(inputType, errorNode);
-            }
-            if (allowStringInput) {
-                return checkElementTypeOfArrayOrString(inputType, errorNode);
-            }
-            if (isArrayLikeType(inputType)) {
-                var indexType = getIndexTypeOfType(inputType, 1);
-                if (indexType) {
-                    return indexType;
-                }
-            }
-            if (errorNode) {
-                error(errorNode, ts.Diagnostics.Type_0_is_not_an_array_type, typeToString(inputType));
-            }
-            return unknownType;
-        }
-        function checkElementTypeOfIterable(iterable, errorNode) {
-            var elementType = getElementTypeOfIterable(iterable, errorNode);
-            if (errorNode && elementType) {
-                checkTypeAssignableTo(iterable, createIterableType(elementType), errorNode);
-            }
-            return elementType || anyType;
-        }
-        function getElementTypeOfIterable(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            var typeAsIterable = type;
-            if (!typeAsIterable.iterableElementType) {
-                if ((type.flags & 4096) && type.target === getGlobalIterableType()) {
-                    typeAsIterable.iterableElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorFunction = getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator"));
-                    if (isTypeAny(iteratorFunction)) {
-                        return undefined;
-                    }
-                    var iteratorFunctionSignatures = iteratorFunction ? getSignaturesOfType(iteratorFunction, 0) : emptyArray;
-                    if (iteratorFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
-                        }
-                        return undefined;
-                    }
-                    typeAsIterable.iterableElementType = getElementTypeOfIterator(getUnionType(ts.map(iteratorFunctionSignatures, getReturnTypeOfSignature)), errorNode);
-                }
-            }
-            return typeAsIterable.iterableElementType;
-        }
-        function getElementTypeOfIterator(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            var typeAsIterator = type;
-            if (!typeAsIterator.iteratorElementType) {
-                if ((type.flags & 4096) && type.target === getGlobalIteratorType()) {
-                    typeAsIterator.iteratorElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorNextFunction = getTypeOfPropertyOfType(type, "next");
-                    if (isTypeAny(iteratorNextFunction)) {
-                        return undefined;
-                    }
-                    var iteratorNextFunctionSignatures = iteratorNextFunction ? getSignaturesOfType(iteratorNextFunction, 0) : emptyArray;
-                    if (iteratorNextFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.An_iterator_must_have_a_next_method);
-                        }
-                        return undefined;
-                    }
-                    var iteratorNextResult = getUnionType(ts.map(iteratorNextFunctionSignatures, getReturnTypeOfSignature));
-                    if (isTypeAny(iteratorNextResult)) {
-                        return undefined;
-                    }
-                    var iteratorNextValue = getTypeOfPropertyOfType(iteratorNextResult, "value");
-                    if (!iteratorNextValue) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
-                        }
-                        return undefined;
-                    }
-                    typeAsIterator.iteratorElementType = iteratorNextValue;
-                }
-            }
-            return typeAsIterator.iteratorElementType;
-        }
-        function getElementTypeOfIterableIterator(type) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            if ((type.flags & 4096) && type.target === getGlobalIterableIteratorType()) {
-                return type.typeArguments[0];
-            }
-            return getElementTypeOfIterable(type, undefined) ||
-                getElementTypeOfIterator(type, undefined);
-        }
-        function checkElementTypeOfArrayOrString(arrayOrStringType, errorNode) {
-            ts.Debug.assert(languageVersion < 2);
-            var arrayType = arrayOrStringType;
-            if (arrayOrStringType.flags & 16384) {
-                arrayType = getUnionType(ts.filter(arrayOrStringType.types, function (t) { return !(t.flags & 258); }));
-            }
-            else if (arrayOrStringType.flags & 258) {
-                arrayType = neverType;
-            }
-            var hasStringConstituent = arrayOrStringType !== arrayType;
-            var reportedError = false;
-            if (hasStringConstituent) {
-                if (languageVersion < 1) {
-                    error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
-                    reportedError = true;
-                }
-                if (arrayType === neverType) {
-                    return stringType;
-                }
-            }
-            if (!isArrayLikeType(arrayType)) {
-                if (!reportedError) {
-                    var diagnostic = hasStringConstituent
-                        ? ts.Diagnostics.Type_0_is_not_an_array_type
-                        : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
-                    error(errorNode, diagnostic, typeToString(arrayType));
-                }
-                return hasStringConstituent ? stringType : unknownType;
-            }
-            var arrayElementType = getIndexTypeOfType(arrayType, 1) || unknownType;
-            if (hasStringConstituent) {
-                if (arrayElementType.flags & 258) {
-                    return stringType;
-                }
-                return getUnionType([arrayElementType, stringType]);
-            }
-            return arrayElementType;
-        }
-        function checkBreakOrContinueStatement(node) {
-            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
-        }
-        function isGetAccessorWithAnnotatedSetAccessor(node) {
-            return !!(node.kind === 149 && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 150)));
-        }
-        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
-            var unwrappedReturnType = ts.isAsyncFunctionLike(func) ? getPromisedType(returnType) : returnType;
-            return maybeTypeOfKind(unwrappedReturnType, 16 | 1);
-        }
-        function checkReturnStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var functionBlock = ts.getContainingFunction(node);
-                if (!functionBlock) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
-                }
-            }
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var signature = getSignatureFromDeclaration(func);
-                var returnType = getReturnTypeOfSignature(signature);
-                if (strictNullChecks || node.expression || returnType === neverType) {
-                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
-                    if (func.asteriskToken) {
-                        return;
-                    }
-                    if (func.kind === 150) {
-                        if (node.expression) {
-                            error(node.expression, ts.Diagnostics.Setters_cannot_return_a_value);
-                        }
-                    }
-                    else if (func.kind === 148) {
-                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node.expression)) {
-                            error(node.expression, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
-                        }
-                    }
-                    else if (func.type || isGetAccessorWithAnnotatedSetAccessor(func)) {
-                        if (ts.isAsyncFunctionLike(func)) {
-                            var promisedType = getPromisedType(returnType);
-                            var awaitedType = checkAwaitedType(exprType, node.expression || node, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                            if (promisedType) {
-                                checkTypeAssignableTo(awaitedType, promisedType, node.expression || node);
-                            }
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnType, node.expression || node);
-                        }
-                    }
-                }
-                else if (func.kind !== 148 && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
-                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
-                }
-            }
-        }
-        function checkWithStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.flags & 33554432) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
-                }
-            }
-            checkExpression(node.expression);
-            error(node.expression, ts.Diagnostics.All_symbols_within_a_with_block_will_be_resolved_to_any);
-        }
-        function checkSwitchStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            var firstDefaultClause;
-            var hasDuplicateDefaultClause = false;
-            var expressionType = checkExpression(node.expression);
-            ts.forEach(node.caseBlock.clauses, function (clause) {
-                if (clause.kind === 250 && !hasDuplicateDefaultClause) {
-                    if (firstDefaultClause === undefined) {
-                        firstDefaultClause = clause;
-                    }
-                    else {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
-                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
-                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
-                        hasDuplicateDefaultClause = true;
-                    }
-                }
-                if (produceDiagnostics && clause.kind === 249) {
-                    var caseClause = clause;
-                    var caseType = checkExpression(caseClause.expression);
-                    if (!isTypeComparableTo(expressionType, caseType)) {
-                        checkTypeComparableTo(caseType, expressionType, caseClause.expression, undefined);
-                    }
-                }
-                ts.forEach(clause.statements, checkSourceElement);
-            });
-        }
-        function checkLabeledStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var current = node.parent;
-                while (current) {
-                    if (ts.isFunctionLike(current)) {
-                        break;
-                    }
-                    if (current.kind === 214 && current.label.text === node.label.text) {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
-                        break;
-                    }
-                    current = current.parent;
-                }
-            }
-            checkSourceElement(node.statement);
-        }
-        function checkThrowStatement(node) {
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.expression === undefined) {
-                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
-                }
-            }
-            if (node.expression) {
-                checkExpression(node.expression);
-            }
-        }
-        function checkTryStatement(node) {
-            checkGrammarStatementInAmbientContext(node);
-            checkBlock(node.tryBlock);
-            var catchClause = node.catchClause;
-            if (catchClause) {
-                if (catchClause.variableDeclaration) {
-                    if (catchClause.variableDeclaration.name.kind !== 69) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.name, ts.Diagnostics.Catch_clause_variable_name_must_be_an_identifier);
-                    }
-                    else if (catchClause.variableDeclaration.type) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
-                    }
-                    else if (catchClause.variableDeclaration.initializer) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
-                    }
-                    else {
-                        var identifierName = catchClause.variableDeclaration.name.text;
-                        var locals = catchClause.block.locals;
-                        if (locals && ts.hasProperty(locals, identifierName)) {
-                            var localSymbol = locals[identifierName];
-                            if (localSymbol && (localSymbol.flags & 2) !== 0) {
-                                grammarErrorOnNode(localSymbol.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, identifierName);
-                            }
-                        }
-                    }
-                }
-                checkBlock(catchClause.block);
-            }
-            if (node.finallyBlock) {
-                checkBlock(node.finallyBlock);
-            }
-        }
-        function checkIndexConstraints(type) {
-            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1);
-            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0);
-            var stringIndexType = getIndexTypeOfType(type, 0);
-            var numberIndexType = getIndexTypeOfType(type, 1);
-            if (stringIndexType || numberIndexType) {
-                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
-                    var propType = getTypeOfSymbol(prop);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1);
-                });
-                if (type.flags & 1024 && ts.isClassLike(type.symbol.valueDeclaration)) {
-                    var classDeclaration = type.symbol.valueDeclaration;
-                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
-                        var member = _a[_i];
-                        if (!(member.flags & 32) && ts.hasDynamicName(member)) {
-                            var propType = getTypeOfSymbol(member.symbol);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1);
-                        }
-                    }
-                }
-            }
-            var errorNode;
-            if (stringIndexType && numberIndexType) {
-                errorNode = declaredNumberIndexer || declaredStringIndexer;
-                if (!errorNode && (type.flags & 2048)) {
-                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0) && getIndexTypeOfType(base, 1); });
-                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
-                }
-            }
-            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
-                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
-            }
-            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
-                if (!indexType) {
-                    return;
-                }
-                if (indexKind === 1 && !isNumericName(prop.valueDeclaration.name)) {
-                    return;
-                }
-                var errorNode;
-                if (prop.valueDeclaration.name.kind === 140 || prop.parent === containingType.symbol) {
-                    errorNode = prop.valueDeclaration;
-                }
-                else if (indexDeclaration) {
-                    errorNode = indexDeclaration;
-                }
-                else if (containingType.flags & 2048) {
-                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
-                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
-                }
-                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
-                    var errorMessage = indexKind === 0
-                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
-                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
-                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
-                }
-            }
-        }
-        function checkTypeNameIsReserved(name, message) {
-            switch (name.text) {
-                case "any":
-                case "number":
-                case "boolean":
-                case "string":
-                case "symbol":
-                case "void":
-                    error(name, message, name.text);
-            }
-        }
-        function checkTypeParameters(typeParameterDeclarations) {
-            if (typeParameterDeclarations) {
-                for (var i = 0, n = typeParameterDeclarations.length; i < n; i++) {
-                    var node = typeParameterDeclarations[i];
-                    checkTypeParameter(node);
-                    if (produceDiagnostics) {
-                        for (var j = 0; j < i; j++) {
-                            if (typeParameterDeclarations[j].symbol === node.symbol) {
-                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        function checkTypeParameterListsIdentical(node, symbol) {
-            if (symbol.declarations.length === 1) {
-                return;
-            }
-            var firstDecl;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 221 || declaration.kind === 222) {
-                    if (!firstDecl) {
-                        firstDecl = declaration;
-                    }
-                    else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) {
-                        error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text);
-                    }
-                }
-            }
-        }
-        function checkClassExpression(node) {
-            checkClassLikeDeclaration(node);
-            checkNodeDeferred(node);
-            return getTypeOfSymbol(getSymbolOfNode(node));
-        }
-        function checkClassExpressionDeferred(node) {
-            ts.forEach(node.members, checkSourceElement);
-        }
-        function checkClassDeclaration(node) {
-            if (!node.name && !(node.flags & 512)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
-            }
-            checkClassLikeDeclaration(node);
-            ts.forEach(node.members, checkSourceElement);
-        }
-        function checkClassLikeDeclaration(node) {
-            checkGrammarClassDeclarationHeritageClauses(node);
-            checkDecorators(node);
-            if (node.name) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-            checkTypeParameters(node.typeParameters);
-            checkExportsOnMergedDeclarations(node);
-            var symbol = getSymbolOfNode(node);
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var typeWithThis = getTypeWithThisArgument(type);
-            var staticType = getTypeOfSymbol(symbol);
-            checkTypeParameterListsIdentical(node, symbol);
-            checkClassForDuplicateDeclarations(node);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                var baseTypes = getBaseTypes(type);
-                if (baseTypes.length && produceDiagnostics) {
-                    var baseType_1 = baseTypes[0];
-                    var staticBaseType = getBaseConstructorTypeOfClass(type);
-                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
-                    checkSourceElement(baseTypeNode.expression);
-                    if (baseTypeNode.typeArguments) {
-                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
-                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments); _i < _a.length; _i++) {
-                            var constructor = _a[_i];
-                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
-                                break;
-                            }
-                        }
-                    }
-                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
-                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
-                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32)) {
-                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
-                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
-                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
-                        }
-                    }
-                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
-                }
-            }
-            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
-            if (implementedTypeNodes) {
-                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
-                    var typeRefNode = implementedTypeNodes_1[_b];
-                    if (!ts.isSupportedExpressionWithTypeArguments(typeRefNode)) {
-                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
-                    }
-                    checkTypeReferenceNode(typeRefNode);
-                    if (produceDiagnostics) {
-                        var t = getTypeFromTypeNode(typeRefNode);
-                        if (t !== unknownType) {
-                            var declaredType = (t.flags & 4096) ? t.target : t;
-                            if (declaredType.flags & (1024 | 2048)) {
-                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
-                            }
-                            else {
-                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
-                            }
-                        }
-                    }
-                }
-            }
-            if (produceDiagnostics) {
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-            }
-        }
-        function checkBaseTypeAccessibility(type, node) {
-            var signatures = getSignaturesOfType(type, 1);
-            if (signatures.length) {
-                var declaration = signatures[0].declaration;
-                if (declaration && declaration.flags & 8) {
-                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
-                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
-                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, node.expression.text);
-                    }
-                }
-            }
-        }
-        function getTargetSymbol(s) {
-            return s.flags & 16777216 ? getSymbolLinks(s).target : s;
-        }
-        function getClassLikeDeclarationOfSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
-        }
-        function checkKindsOfPropertyMemberOverrides(type, baseType) {
-            var baseProperties = getPropertiesOfObjectType(baseType);
-            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
-                var baseProperty = baseProperties_1[_i];
-                var base = getTargetSymbol(baseProperty);
-                if (base.flags & 134217728) {
-                    continue;
-                }
-                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
-                var baseDeclarationFlags = getDeclarationFlagsFromSymbol(base);
-                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
-                if (derived) {
-                    if (derived === base) {
-                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
-                        if (baseDeclarationFlags & 128 && (!derivedClassDecl || !(derivedClassDecl.flags & 128))) {
-                            if (derivedClassDecl.kind === 192) {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
-                            }
-                            else {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
-                            }
-                        }
-                    }
-                    else {
-                        var derivedDeclarationFlags = getDeclarationFlagsFromSymbol(derived);
-                        if ((baseDeclarationFlags & 8) || (derivedDeclarationFlags & 8)) {
-                            continue;
-                        }
-                        if ((baseDeclarationFlags & 32) !== (derivedDeclarationFlags & 32)) {
-                            continue;
-                        }
-                        if ((base.flags & derived.flags & 8192) || ((base.flags & 98308) && (derived.flags & 98308))) {
-                            continue;
-                        }
-                        var errorMessage = void 0;
-                        if (base.flags & 8192) {
-                            if (derived.flags & 98304) {
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
-                            }
-                            else {
-                                ts.Debug.assert((derived.flags & 4) !== 0);
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
-                            }
-                        }
-                        else if (base.flags & 4) {
-                            ts.Debug.assert((derived.flags & 8192) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        else {
-                            ts.Debug.assert((base.flags & 98304) !== 0);
-                            ts.Debug.assert((derived.flags & 8192) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        error(derived.valueDeclaration.name, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
-                    }
-                }
-            }
-        }
-        function isAccessor(kind) {
-            return kind === 149 || kind === 150;
-        }
-        function areTypeParametersIdentical(list1, list2) {
-            if (!list1 && !list2) {
-                return true;
-            }
-            if (!list1 || !list2 || list1.length !== list2.length) {
-                return false;
-            }
-            for (var i = 0, len = list1.length; i < len; i++) {
-                var tp1 = list1[i];
-                var tp2 = list2[i];
-                if (tp1.name.text !== tp2.name.text) {
-                    return false;
-                }
-                if (!tp1.constraint && !tp2.constraint) {
-                    continue;
-                }
-                if (!tp1.constraint || !tp2.constraint) {
-                    return false;
-                }
-                if (!isTypeIdenticalTo(getTypeFromTypeNode(tp1.constraint), getTypeFromTypeNode(tp2.constraint))) {
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkInheritedPropertiesAreIdentical(type, typeNode) {
-            var baseTypes = getBaseTypes(type);
-            if (baseTypes.length < 2) {
-                return true;
-            }
-            var seen = {};
-            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen[p.name] = { prop: p, containingType: type }; });
-            var ok = true;
-            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
-                var base = baseTypes_2[_i];
-                var properties = getPropertiesOfObjectType(getTypeWithThisArgument(base, type.thisType));
-                for (var _a = 0, properties_4 = properties; _a < properties_4.length; _a++) {
-                    var prop = properties_4[_a];
-                    if (!ts.hasProperty(seen, prop.name)) {
-                        seen[prop.name] = { prop: prop, containingType: base };
-                    }
-                    else {
-                        var existing = seen[prop.name];
-                        var isInheritedProperty = existing.containingType !== type;
-                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
-                            ok = false;
-                            var typeName1 = typeToString(existing.containingType);
-                            var typeName2 = typeToString(base);
-                            var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
-                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
-                        }
-                    }
-                }
-            }
-            return ok;
-        }
-        function checkInterfaceDeclaration(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
-            checkTypeParameters(node.typeParameters);
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                checkTypeParameterListsIdentical(node, symbol);
-                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 222);
-                if (node === firstInterfaceDecl) {
-                    var type = getDeclaredTypeOfSymbol(symbol);
-                    var typeWithThis = getTypeWithThisArgument(type);
-                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
-                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
-                            var baseType = _a[_i];
-                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
-                        }
-                        checkIndexConstraints(type);
-                    }
-                }
-                checkObjectTypeForDuplicateDeclarations(node);
-            }
-            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
-                if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
-                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
-                }
-                checkTypeReferenceNode(heritageElement);
-            });
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                checkTypeForDuplicateIndexSignatures(node);
-            }
-        }
-        function checkTypeAliasDeclaration(node) {
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
-            checkSourceElement(node.type);
-        }
-        function computeEnumMemberValues(node) {
-            var nodeLinks = getNodeLinks(node);
-            if (!(nodeLinks.flags & 16384)) {
-                var enumSymbol = getSymbolOfNode(node);
-                var enumType = getDeclaredTypeOfSymbol(enumSymbol);
-                var autoValue = 0;
-                var ambient = ts.isInAmbientContext(node);
-                var enumIsConst = ts.isConst(node);
-                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                    var member = _a[_i];
-                    if (isComputedNonLiteralName(member.name)) {
-                        error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
-                    }
-                    else {
-                        var text = getTextOfPropertyName(member.name);
-                        if (isNumericLiteralName(text)) {
-                            error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
-                        }
-                    }
-                    var previousEnumMemberIsNonConstant = autoValue === undefined;
-                    var initializer = member.initializer;
-                    if (initializer) {
-                        autoValue = computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient);
-                    }
-                    else if (ambient && !enumIsConst) {
-                        autoValue = undefined;
-                    }
-                    else if (previousEnumMemberIsNonConstant) {
-                        error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
-                    }
-                    if (autoValue !== undefined) {
-                        getNodeLinks(member).enumMemberValue = autoValue;
-                        autoValue++;
-                    }
-                }
-                nodeLinks.flags |= 16384;
-            }
-            function computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient) {
-                var reportError = true;
-                var value = evalConstant(initializer);
-                if (reportError) {
-                    if (value === undefined) {
-                        if (enumIsConst) {
-                            error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else if (ambient) {
-                            error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else {
-                            checkTypeAssignableTo(checkExpression(initializer), enumType, initializer, undefined);
-                        }
-                    }
-                    else if (enumIsConst) {
-                        if (isNaN(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN);
-                        }
-                        else if (!isFinite(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
-                        }
-                    }
-                }
-                return value;
-                function evalConstant(e) {
-                    switch (e.kind) {
-                        case 185:
-                            var value_1 = evalConstant(e.operand);
-                            if (value_1 === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operator) {
-                                case 35: return value_1;
-                                case 36: return -value_1;
-                                case 50: return ~value_1;
-                            }
-                            return undefined;
-                        case 187:
-                            var left = evalConstant(e.left);
-                            if (left === undefined) {
-                                return undefined;
-                            }
-                            var right = evalConstant(e.right);
-                            if (right === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operatorToken.kind) {
-                                case 47: return left | right;
-                                case 46: return left & right;
-                                case 44: return left >> right;
-                                case 45: return left >>> right;
-                                case 43: return left << right;
-                                case 48: return left ^ right;
-                                case 37: return left * right;
-                                case 39: return left / right;
-                                case 35: return left + right;
-                                case 36: return left - right;
-                                case 40: return left % right;
-                            }
-                            return undefined;
-                        case 8:
-                            return +e.text;
-                        case 178:
-                            return evalConstant(e.expression);
-                        case 69:
-                        case 173:
-                        case 172:
-                            var member = initializer.parent;
-                            var currentType = getTypeOfSymbol(getSymbolOfNode(member.parent));
-                            var enumType_1;
-                            var propertyName = void 0;
-                            if (e.kind === 69) {
-                                enumType_1 = currentType;
-                                propertyName = e.text;
-                            }
-                            else {
-                                var expression = void 0;
-                                if (e.kind === 173) {
-                                    if (e.argumentExpression === undefined ||
-                                        e.argumentExpression.kind !== 9) {
-                                        return undefined;
-                                    }
-                                    expression = e.expression;
-                                    propertyName = e.argumentExpression.text;
-                                }
-                                else {
-                                    expression = e.expression;
-                                    propertyName = e.name.text;
-                                }
-                                var current = expression;
-                                while (current) {
-                                    if (current.kind === 69) {
-                                        break;
-                                    }
-                                    else if (current.kind === 172) {
-                                        current = current.expression;
-                                    }
-                                    else {
-                                        return undefined;
-                                    }
-                                }
-                                enumType_1 = checkExpression(expression);
-                                if (!(enumType_1.symbol && (enumType_1.symbol.flags & 384))) {
-                                    return undefined;
-                                }
-                            }
-                            if (propertyName === undefined) {
-                                return undefined;
-                            }
-                            var property = getPropertyOfObjectType(enumType_1, propertyName);
-                            if (!property || !(property.flags & 8)) {
-                                return undefined;
-                            }
-                            var propertyDecl = property.valueDeclaration;
-                            if (member === propertyDecl) {
-                                return undefined;
-                            }
-                            if (!isBlockScopedNameDeclaredBeforeUse(propertyDecl, member)) {
-                                reportError = false;
-                                error(e, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
-                                return undefined;
-                            }
-                            return getNodeLinks(propertyDecl).enumMemberValue;
-                    }
-                }
-            }
-        }
-        function checkEnumDeclaration(node) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkExportsOnMergedDeclarations(node);
-            computeEnumMemberValues(node);
-            var enumIsConst = ts.isConst(node);
-            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
-                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
-            }
-            var enumSymbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
-            if (node === firstDeclaration) {
-                if (enumSymbol.declarations.length > 1) {
-                    ts.forEach(enumSymbol.declarations, function (decl) {
-                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
-                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
-                        }
-                    });
-                }
-                var seenEnumMissingInitialInitializer_1 = false;
-                ts.forEach(enumSymbol.declarations, function (declaration) {
-                    if (declaration.kind !== 224) {
-                        return false;
-                    }
-                    var enumDeclaration = declaration;
-                    if (!enumDeclaration.members.length) {
-                        return false;
-                    }
-                    var firstEnumMember = enumDeclaration.members[0];
-                    if (!firstEnumMember.initializer) {
-                        if (seenEnumMissingInitialInitializer_1) {
-                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
-                        }
-                        else {
-                            seenEnumMissingInitialInitializer_1 = true;
-                        }
-                    }
-                });
-            }
-        }
-        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
-            var declarations = symbol.declarations;
-            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
-                var declaration = declarations_5[_i];
-                if ((declaration.kind === 221 ||
-                    (declaration.kind === 220 && ts.nodeIsPresent(declaration.body))) &&
-                    !ts.isInAmbientContext(declaration)) {
-                    return declaration;
-                }
-            }
-            return undefined;
-        }
-        function inSameLexicalScope(node1, node2) {
-            var container1 = ts.getEnclosingBlockScopeContainer(node1);
-            var container2 = ts.getEnclosingBlockScopeContainer(node2);
-            if (isGlobalSourceFile(container1)) {
-                return isGlobalSourceFile(container2);
-            }
-            else if (isGlobalSourceFile(container2)) {
-                return false;
-            }
-            else {
-                return container1 === container2;
-            }
-        }
-        function checkModuleDeclaration(node) {
-            if (produceDiagnostics) {
-                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
-                var inAmbientContext = ts.isInAmbientContext(node);
-                if (isGlobalAugmentation && !inAmbientContext) {
-                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
-                }
-                var isAmbientExternalModule = ts.isAmbientModule(node);
-                var contextErrorMessage = isAmbientExternalModule
-                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
-                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
-                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
-                    return;
-                }
-                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
-                    if (!inAmbientContext && node.name.kind === 9) {
-                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
-                    }
-                }
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                if (symbol.flags & 512
-                    && symbol.declarations.length > 1
-                    && !inAmbientContext
-                    && ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
-                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
-                    if (firstNonAmbientClassOrFunc) {
-                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
-                        }
-                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
-                        }
-                    }
-                    var mergedClass = ts.getDeclarationOfKind(symbol, 221);
-                    if (mergedClass &&
-                        inSameLexicalScope(node, mergedClass)) {
-                        getNodeLinks(node).flags |= 32768;
-                    }
-                }
-                if (isAmbientExternalModule) {
-                    if (ts.isExternalModuleAugmentation(node)) {
-                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432);
-                        if (checkBody) {
-                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
-                                var statement = _a[_i];
-                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
-                            }
-                        }
-                    }
-                    else if (isGlobalSourceFile(node.parent)) {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
-                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
-                        }
-                    }
-                    else {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else {
-                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
-                        }
-                    }
-                }
-            }
-            checkSourceElement(node.body);
-        }
-        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
-            switch (node.kind) {
-                case 200:
-                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
-                        var decl = _a[_i];
-                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
-                    }
-                    break;
-                case 235:
-                case 236:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
-                    break;
-                case 229:
-                case 230:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
-                    break;
-                case 169:
-                case 218:
-                    var name_18 = node.name;
-                    if (ts.isBindingPattern(name_18)) {
-                        for (var _b = 0, _c = name_18.elements; _b < _c.length; _b++) {
-                            var el = _c[_b];
-                            checkModuleAugmentationElement(el, isGlobalAugmentation);
-                        }
-                        break;
-                    }
-                case 221:
-                case 224:
-                case 220:
-                case 222:
-                case 225:
-                case 223:
-                    if (isGlobalAugmentation) {
-                        return;
-                    }
-                    var symbol = getSymbolOfNode(node);
-                    if (symbol) {
-                        var reportError = !(symbol.flags & 33554432);
-                        if (!reportError) {
-                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
-                        }
-                    }
-                    break;
-            }
-        }
-        function getFirstIdentifier(node) {
-            while (true) {
-                if (node.kind === 139) {
-                    node = node.left;
-                }
-                else if (node.kind === 172) {
-                    node = node.expression;
-                }
-                else {
-                    break;
-                }
-            }
-            ts.Debug.assert(node.kind === 69);
-            return node;
-        }
-        function checkExternalImportOrExportDeclaration(node) {
-            var moduleName = ts.getExternalModuleName(node);
-            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9) {
-                error(moduleName, ts.Diagnostics.String_literal_expected);
-                return false;
-            }
-            var inAmbientExternalModule = node.parent.kind === 226 && ts.isAmbientModule(node.parent.parent);
-            if (node.parent.kind !== 256 && !inAmbientExternalModule) {
-                error(moduleName, node.kind === 236 ?
-                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
-                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
-                return false;
-            }
-            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
-                if (!isTopLevelInExternalModuleAugmentation(node)) {
-                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkAliasSymbol(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target !== unknownSymbol) {
-                var excludedMeanings = (symbol.flags & (107455 | 1048576) ? 107455 : 0) |
-                    (symbol.flags & 793056 ? 793056 : 0) |
-                    (symbol.flags & 1536 ? 1536 : 0);
-                if (target.flags & excludedMeanings) {
-                    var message = node.kind === 238 ?
-                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
-                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
-                    error(node, message, symbolToString(symbol));
-                }
-            }
-        }
-        function checkImportBinding(node) {
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkAliasSymbol(node);
-        }
-        function checkImportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
-            }
-            if (checkExternalImportOrExportDeclaration(node)) {
-                var importClause = node.importClause;
-                if (importClause) {
-                    if (importClause.name) {
-                        checkImportBinding(importClause);
-                    }
-                    if (importClause.namedBindings) {
-                        if (importClause.namedBindings.kind === 232) {
-                            checkImportBinding(importClause.namedBindings);
-                        }
-                        else {
-                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
-                        }
-                    }
-                }
-            }
-        }
-        function checkImportEqualsDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                return;
-            }
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
-                checkImportBinding(node);
-                if (node.flags & 1) {
-                    markExportAsReferenced(node);
-                }
-                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    var target = resolveAlias(getSymbolOfNode(node));
-                    if (target !== unknownSymbol) {
-                        if (target.flags & 107455) {
-                            var moduleName = getFirstIdentifier(node.moduleReference);
-                            if (!(resolveEntityName(moduleName, 107455 | 1536).flags & 1536)) {
-                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
-                            }
-                        }
-                        if (target.flags & 793056) {
-                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
-                        }
-                    }
-                }
-                else {
-                    if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
-                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
-                    }
-                }
-            }
-        }
-        function checkExportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
-            }
-            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
-                if (node.exportClause) {
-                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
-                    var inAmbientExternalModule = node.parent.kind === 226 && ts.isAmbientModule(node.parent.parent);
-                    if (node.parent.kind !== 256 && !inAmbientExternalModule) {
-                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
-                    }
-                }
-                else {
-                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
-                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
-                    }
-                }
-            }
-        }
-        function checkGrammarModuleElementContext(node, errorMessage) {
-            if (node.parent.kind !== 256 && node.parent.kind !== 226 && node.parent.kind !== 225) {
-                return grammarErrorOnFirstToken(node, errorMessage);
-            }
-        }
-        function checkExportSpecifier(node) {
-            checkAliasSymbol(node);
-            if (!node.parent.parent.moduleSpecifier) {
-                var exportedName = node.propertyName || node.name;
-                var symbol = resolveName(exportedName, exportedName.text, 107455 | 793056 | 1536 | 8388608, undefined, undefined);
-                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
-                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
-                }
-                else {
-                    markExportAsReferenced(node);
-                }
-            }
-        }
-        function checkExportAssignment(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
-                return;
-            }
-            var container = node.parent.kind === 256 ? node.parent : node.parent.parent;
-            if (container.kind === 225 && !ts.isAmbientModule(container)) {
-                error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
-            }
-            if (node.expression.kind === 69) {
-                markExportAsReferenced(node);
-            }
-            else {
-                checkExpressionCached(node.expression);
-            }
-            checkExternalModuleExports(container);
-            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
-                if (modulekind === ts.ModuleKind.ES6) {
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
-                }
-                else if (modulekind === ts.ModuleKind.System) {
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
-                }
-            }
-        }
-        function hasExportedMembers(moduleSymbol) {
-            for (var id in moduleSymbol.exports) {
-                if (id !== "export=") {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function checkExternalModuleExports(node) {
-            var moduleSymbol = getSymbolOfNode(node);
-            var links = getSymbolLinks(moduleSymbol);
-            if (!links.exportsChecked) {
-                var exportEqualsSymbol = moduleSymbol.exports["export="];
-                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
-                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
-                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
-                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
-                    }
-                }
-                var exports = getExportsOfModule(moduleSymbol);
-                for (var id in exports) {
-                    if (id === "__export") {
-                        continue;
-                    }
-                    var _a = exports[id], declarations = _a.declarations, flags = _a.flags;
-                    if (flags & (1536 | 64 | 384)) {
-                        continue;
-                    }
-                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
-                    if (flags & 524288 && exportedDeclarationsCount <= 2) {
-                        continue;
-                    }
-                    if (exportedDeclarationsCount > 1) {
-                        for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
-                            var declaration = declarations_6[_i];
-                            if (isNotOverload(declaration)) {
-                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
-                            }
-                        }
-                    }
-                }
-                links.exportsChecked = true;
-            }
-            function isNotOverload(declaration) {
-                return declaration.kind !== 220 || !!declaration.body;
-            }
-        }
-        function checkSourceElement(node) {
-            if (!node) {
-                return;
-            }
-            var kind = node.kind;
-            if (cancellationToken) {
-                switch (kind) {
-                    case 225:
-                    case 221:
-                    case 222:
-                    case 220:
-                        cancellationToken.throwIfCancellationRequested();
-                }
-            }
-            switch (kind) {
-                case 141:
-                    return checkTypeParameter(node);
-                case 142:
-                    return checkParameter(node);
-                case 145:
-                case 144:
-                    return checkPropertyDeclaration(node);
-                case 156:
-                case 157:
-                case 151:
-                case 152:
-                    return checkSignatureDeclaration(node);
-                case 153:
-                    return checkSignatureDeclaration(node);
-                case 147:
-                case 146:
-                    return checkMethodDeclaration(node);
-                case 148:
-                    return checkConstructorDeclaration(node);
-                case 149:
-                case 150:
-                    return checkAccessorDeclaration(node);
-                case 155:
-                    return checkTypeReferenceNode(node);
-                case 154:
-                    return checkTypePredicate(node);
-                case 158:
-                    return checkTypeQuery(node);
-                case 159:
-                    return checkTypeLiteral(node);
-                case 160:
-                    return checkArrayType(node);
-                case 161:
-                    return checkTupleType(node);
-                case 162:
-                case 163:
-                    return checkUnionOrIntersectionType(node);
-                case 164:
-                    return checkSourceElement(node.type);
-                case 220:
-                    return checkFunctionDeclaration(node);
-                case 199:
-                case 226:
-                    return checkBlock(node);
-                case 200:
-                    return checkVariableStatement(node);
-                case 202:
-                    return checkExpressionStatement(node);
-                case 203:
-                    return checkIfStatement(node);
-                case 204:
-                    return checkDoStatement(node);
-                case 205:
-                    return checkWhileStatement(node);
-                case 206:
-                    return checkForStatement(node);
-                case 207:
-                    return checkForInStatement(node);
-                case 208:
-                    return checkForOfStatement(node);
-                case 209:
-                case 210:
-                    return checkBreakOrContinueStatement(node);
-                case 211:
-                    return checkReturnStatement(node);
-                case 212:
-                    return checkWithStatement(node);
-                case 213:
-                    return checkSwitchStatement(node);
-                case 214:
-                    return checkLabeledStatement(node);
-                case 215:
-                    return checkThrowStatement(node);
-                case 216:
-                    return checkTryStatement(node);
-                case 218:
-                    return checkVariableDeclaration(node);
-                case 169:
-                    return checkBindingElement(node);
-                case 221:
-                    return checkClassDeclaration(node);
-                case 222:
-                    return checkInterfaceDeclaration(node);
-                case 223:
-                    return checkTypeAliasDeclaration(node);
-                case 224:
-                    return checkEnumDeclaration(node);
-                case 225:
-                    return checkModuleDeclaration(node);
-                case 230:
-                    return checkImportDeclaration(node);
-                case 229:
-                    return checkImportEqualsDeclaration(node);
-                case 236:
-                    return checkExportDeclaration(node);
-                case 235:
-                    return checkExportAssignment(node);
-                case 201:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 217:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 239:
-                    return checkMissingDeclaration(node);
-            }
-        }
-        function checkNodeDeferred(node) {
-            if (deferredNodes) {
-                deferredNodes.push(node);
-            }
-        }
-        function checkDeferredNodes() {
-            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
-                var node = deferredNodes_1[_i];
-                switch (node.kind) {
-                    case 179:
-                    case 180:
-                    case 147:
-                    case 146:
-                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
-                        break;
-                    case 149:
-                    case 150:
-                        checkAccessorDeferred(node);
-                        break;
-                    case 192:
-                        checkClassExpressionDeferred(node);
-                        break;
-                }
-            }
-        }
-        function checkSourceFile(node) {
-            var start = new Date().getTime();
-            checkSourceFileWorker(node);
-            ts.checkTime += new Date().getTime() - start;
-        }
-        function checkSourceFileWorker(node) {
-            var links = getNodeLinks(node);
-            if (!(links.flags & 1)) {
-                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
-                    return;
-                }
-                checkGrammarSourceFile(node);
-                potentialThisCollisions.length = 0;
-                deferredNodes = [];
-                ts.forEach(node.statements, checkSourceElement);
-                checkDeferredNodes();
-                deferredNodes = undefined;
-                if (ts.isExternalOrCommonJsModule(node)) {
-                    checkExternalModuleExports(node);
-                }
-                if (potentialThisCollisions.length) {
-                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
-                    potentialThisCollisions.length = 0;
-                }
-                links.flags |= 1;
-            }
-        }
-        function getDiagnostics(sourceFile, ct) {
-            try {
-                cancellationToken = ct;
-                return getDiagnosticsWorker(sourceFile);
-            }
-            finally {
-                cancellationToken = undefined;
-            }
-        }
-        function getDiagnosticsWorker(sourceFile) {
-            throwIfNonDiagnosticsProducing();
-            if (sourceFile) {
-                checkSourceFile(sourceFile);
-                return diagnostics.getDiagnostics(sourceFile.fileName);
-            }
-            ts.forEach(host.getSourceFiles(), checkSourceFile);
-            return diagnostics.getDiagnostics();
-        }
-        function getGlobalDiagnostics() {
-            throwIfNonDiagnosticsProducing();
-            return diagnostics.getGlobalDiagnostics();
-        }
-        function throwIfNonDiagnosticsProducing() {
-            if (!produceDiagnostics) {
-                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
-            }
-        }
-        function isInsideWithStatementBody(node) {
-            if (node) {
-                while (node.parent) {
-                    if (node.parent.kind === 212 && node.parent.statement === node) {
-                        return true;
-                    }
-                    node = node.parent;
-                }
-            }
-            return false;
-        }
-        function getSymbolsInScope(location, meaning) {
-            var symbols = {};
-            var memberFlags = 0;
-            if (isInsideWithStatementBody(location)) {
-                return [];
-            }
-            populateSymbols();
-            return symbolsToArray(symbols);
-            function populateSymbols() {
-                while (location) {
-                    if (location.locals && !isGlobalSourceFile(location)) {
-                        copySymbols(location.locals, meaning);
-                    }
-                    switch (location.kind) {
-                        case 256:
-                            if (!ts.isExternalOrCommonJsModule(location)) {
-                                break;
-                            }
-                        case 225:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931);
-                            break;
-                        case 224:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8);
-                            break;
-                        case 192:
-                            var className = location.name;
-                            if (className) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                        case 221:
-                        case 222:
-                            if (!(memberFlags & 32)) {
-                                copySymbols(getSymbolOfNode(location).members, meaning & 793056);
-                            }
-                            break;
-                        case 179:
-                            var funcName = location.name;
-                            if (funcName) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                            break;
-                    }
-                    if (ts.introducesArgumentsExoticObject(location)) {
-                        copySymbol(argumentsSymbol, meaning);
-                    }
-                    memberFlags = location.flags;
-                    location = location.parent;
-                }
-                copySymbols(globals, meaning);
-            }
-            function copySymbol(symbol, meaning) {
-                if (symbol.flags & meaning) {
-                    var id = symbol.name;
-                    if (!ts.hasProperty(symbols, id)) {
-                        symbols[id] = symbol;
-                    }
-                }
-            }
-            function copySymbols(source, meaning) {
-                if (meaning) {
-                    for (var id in source) {
-                        var symbol = source[id];
-                        copySymbol(symbol, meaning);
-                    }
-                }
-            }
-        }
-        function isTypeDeclarationName(name) {
-            return name.kind === 69 &&
-                isTypeDeclaration(name.parent) &&
-                name.parent.name === name;
-        }
-        function isTypeDeclaration(node) {
-            switch (node.kind) {
-                case 141:
-                case 221:
-                case 222:
-                case 223:
-                case 224:
-                    return true;
-            }
-        }
-        function isTypeReferenceIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 139) {
-                node = node.parent;
-            }
-            return node.parent && node.parent.kind === 155;
-        }
-        function isHeritageClauseElementIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 172) {
-                node = node.parent;
-            }
-            return node.parent && node.parent.kind === 194;
-        }
-        function forEachEnclosingClass(node, callback) {
-            var result;
-            while (true) {
-                node = ts.getContainingClass(node);
-                if (!node)
-                    break;
-                if (result = callback(node))
-                    break;
-            }
-            return result;
-        }
-        function isNodeWithinClass(node, classDeclaration) {
-            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
-        }
-        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
-            while (nodeOnRightSide.parent.kind === 139) {
-                nodeOnRightSide = nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 229) {
-                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 235) {
-                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
-            }
-            return undefined;
-        }
-        function isInRightSideOfImportOrExportAssignment(node) {
-            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
-        }
-        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
-            if (ts.isDeclarationName(entityName)) {
-                return getSymbolOfNode(entityName.parent);
-            }
-            if (ts.isInJavaScriptFile(entityName) && entityName.parent.kind === 172) {
-                var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
-                switch (specialPropertyAssignmentKind) {
-                    case 1:
-                    case 3:
-                        return getSymbolOfNode(entityName.parent);
-                    case 4:
-                    case 2:
-                        return getSymbolOfNode(entityName.parent.parent);
-                    default:
-                }
-            }
-            if (entityName.parent.kind === 235) {
-                return resolveEntityName(entityName, 107455 | 793056 | 1536 | 8388608);
-            }
-            if (entityName.kind !== 172) {
-                if (isInRightSideOfImportOrExportAssignment(entityName)) {
-                    return getSymbolOfPartOfRightHandSideOfImportEquals(entityName);
-                }
-            }
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
-            }
-            if (isHeritageClauseElementIdentifier(entityName)) {
-                var meaning = 0;
-                if (entityName.parent.kind === 194) {
-                    meaning = 793056;
-                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                        meaning |= 107455;
-                    }
-                }
-                else {
-                    meaning = 1536;
-                }
-                meaning |= 8388608;
-                return resolveEntityName(entityName, meaning);
-            }
-            else if (ts.isExpression(entityName)) {
-                if (ts.nodeIsMissing(entityName)) {
-                    return undefined;
-                }
-                if (entityName.kind === 69) {
-                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
-                        return getIntrinsicTagSymbol(entityName.parent);
-                    }
-                    var meaning = 107455 | 8388608;
-                    return resolveEntityName(entityName, meaning);
-                }
-                else if (entityName.kind === 172) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkPropertyAccessExpression(entityName);
-                    }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
-                else if (entityName.kind === 139) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkQualifiedName(entityName);
-                    }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
-            }
-            else if (isTypeReferenceIdentifier(entityName)) {
-                var meaning = entityName.parent.kind === 155 ? 793056 : 1536;
-                meaning |= 8388608;
-                return resolveEntityName(entityName, meaning);
-            }
-            else if (entityName.parent.kind === 246) {
-                return getJsxAttributePropertySymbol(entityName.parent);
-            }
-            if (entityName.parent.kind === 154) {
-                return resolveEntityName(entityName, 1);
-            }
-            return undefined;
-        }
-        function getSymbolAtLocation(node) {
-            if (node.kind === 256) {
-                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
-            }
-            if (isInsideWithStatementBody(node)) {
-                return undefined;
-            }
-            if (ts.isDeclarationName(node)) {
-                return getSymbolOfNode(node.parent);
-            }
-            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
-                return getSymbolOfNode(node.parent.parent);
-            }
-            if (node.kind === 69) {
-                if (isInRightSideOfImportOrExportAssignment(node)) {
-                    return node.parent.kind === 235
-                        ? getSymbolOfEntityNameOrPropertyAccessExpression(node)
-                        : getSymbolOfPartOfRightHandSideOfImportEquals(node);
-                }
-                else if (node.parent.kind === 169 &&
-                    node.parent.parent.kind === 167 &&
-                    node === node.parent.propertyName) {
-                    var typeOfPattern = getTypeOfNode(node.parent.parent);
-                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
-                    if (propertyDeclaration) {
-                        return propertyDeclaration;
-                    }
-                }
-            }
-            switch (node.kind) {
-                case 69:
-                case 172:
-                case 139:
-                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
-                case 97:
-                case 95:
-                    var type = ts.isExpression(node) ? checkExpression(node) : getTypeFromTypeNode(node);
-                    return type.symbol;
-                case 165:
-                    return getTypeFromTypeNode(node).symbol;
-                case 121:
-                    var constructorDeclaration = node.parent;
-                    if (constructorDeclaration && constructorDeclaration.kind === 148) {
-                        return constructorDeclaration.parent.symbol;
-                    }
-                    return undefined;
-                case 9:
-                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
-                        ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
-                        ((node.parent.kind === 230 || node.parent.kind === 236) &&
-                            node.parent.moduleSpecifier === node)) {
-                        return resolveExternalModuleName(node, node);
-                    }
-                case 8:
-                    if (node.parent.kind === 173 && node.parent.argumentExpression === node) {
-                        var objectType = checkExpression(node.parent.expression);
-                        if (objectType === unknownType)
-                            return undefined;
-                        var apparentType = getApparentType(objectType);
-                        if (apparentType === unknownType)
-                            return undefined;
-                        return getPropertyOfType(apparentType, node.text);
-                    }
-                    break;
-            }
-            return undefined;
-        }
-        function getShorthandAssignmentValueSymbol(location) {
-            if (location && location.kind === 254) {
-                return resolveEntityName(location.name, 107455 | 8388608);
-            }
-            return undefined;
-        }
-        function getExportSpecifierLocalTargetSymbol(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 | 793056 | 1536 | 8388608);
-        }
-        function getTypeOfNode(node) {
-            if (isInsideWithStatementBody(node)) {
-                return unknownType;
-            }
-            if (ts.isTypeNode(node)) {
-                return getTypeFromTypeNode(node);
-            }
-            if (ts.isExpression(node)) {
-                return getTypeOfExpression(node);
-            }
-            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
-                return getBaseTypes(getDeclaredTypeOfSymbol(getSymbolOfNode(node.parent.parent)))[0];
-            }
-            if (isTypeDeclaration(node)) {
-                var symbol = getSymbolOfNode(node);
-                return getDeclaredTypeOfSymbol(symbol);
-            }
-            if (isTypeDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getDeclaredTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclaration(node)) {
-                var symbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getTypeOfSymbol(symbol);
-            }
-            if (ts.isBindingPattern(node)) {
-                return getTypeForVariableLikeDeclaration(node.parent, true);
-            }
-            if (isInRightSideOfImportOrExportAssignment(node)) {
-                var symbol = getSymbolAtLocation(node);
-                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
-                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
-            }
-            return unknownType;
-        }
-        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
-            ts.Debug.assert(expr.kind === 171 || expr.kind === 170);
-            if (expr.parent.kind === 208) {
-                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
-            }
-            if (expr.parent.kind === 187) {
-                var iteratedType = checkExpression(expr.parent.right);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
-            }
-            if (expr.parent.kind === 253) {
-                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
-                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
-            }
-            ts.Debug.assert(expr.parent.kind === 170);
-            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
-            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, false) || unknownType;
-            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
-        }
-        function getPropertySymbolOfDestructuringAssignment(location) {
-            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
-            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
-        }
-        function getTypeOfExpression(expr) {
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
-                expr = expr.parent;
-            }
-            return checkExpression(expr);
-        }
-        function getParentTypeOfClassElement(node) {
-            var classSymbol = getSymbolOfNode(node.parent);
-            return node.flags & 32
-                ? getTypeOfSymbol(classSymbol)
-                : getDeclaredTypeOfSymbol(classSymbol);
-        }
-        function getAugmentedPropertiesOfType(type) {
-            type = getApparentType(type);
-            var propsByName = createSymbolTable(getPropertiesOfType(type));
-            if (getSignaturesOfType(type, 0).length || getSignaturesOfType(type, 1).length) {
-                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
-                    if (!ts.hasProperty(propsByName, p.name)) {
-                        propsByName[p.name] = p;
-                    }
-                });
-            }
-            return getNamedMembers(propsByName);
-        }
-        function getRootSymbols(symbol) {
-            if (symbol.flags & 268435456) {
-                var symbols_3 = [];
-                var name_19 = symbol.name;
-                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
-                    var symbol = getPropertyOfType(t, name_19);
-                    if (symbol) {
-                        symbols_3.push(symbol);
-                    }
-                });
-                return symbols_3;
-            }
-            else if (symbol.flags & 67108864) {
-                var target = void 0;
-                var next = symbol;
-                while (next = getSymbolLinks(next).target) {
-                    target = next;
-                }
-                if (target) {
-                    return [target];
-                }
-            }
-            return [symbol];
-        }
-        function isArgumentsLocalBinding(node) {
-            return getReferencedValueSymbol(node) === argumentsSymbol;
-        }
-        function moduleExportsSomeValue(moduleReferenceExpression) {
-            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
-            if (!moduleSymbol) {
-                return true;
-            }
-            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
-            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
-            var symbolLinks = getSymbolLinks(moduleSymbol);
-            if (symbolLinks.exportsSomeValue === undefined) {
-                symbolLinks.exportsSomeValue = hasExportAssignment
-                    ? !!(moduleSymbol.flags & 107455)
-                    : ts.forEachValue(getExportsOfModule(moduleSymbol), isValue);
-            }
-            return symbolLinks.exportsSomeValue;
-            function isValue(s) {
-                s = resolveSymbol(s);
-                return s && !!(s.flags & 107455);
-            }
-        }
-        function getReferencedExportContainer(node) {
-            var symbol = getReferencedValueSymbol(node);
-            if (symbol) {
-                if (symbol.flags & 1048576) {
-                    var exportSymbol = getMergedSymbol(symbol.exportSymbol);
-                    if (exportSymbol.flags & 944) {
-                        return undefined;
-                    }
-                    symbol = exportSymbol;
-                }
-                var parentSymbol = getParentOfSymbol(symbol);
-                if (parentSymbol) {
-                    if (parentSymbol.flags & 512 && parentSymbol.valueDeclaration.kind === 256) {
-                        return parentSymbol.valueDeclaration;
-                    }
-                    for (var n = node.parent; n; n = n.parent) {
-                        if ((n.kind === 225 || n.kind === 224) && getSymbolOfNode(n) === parentSymbol) {
-                            return n;
-                        }
-                    }
-                }
-            }
-        }
-        function getReferencedImportDeclaration(node) {
-            var symbol = getReferencedValueSymbol(node);
-            return symbol && symbol.flags & 8388608 ? getDeclarationOfAliasSymbol(symbol) : undefined;
-        }
-        function isSymbolOfDeclarationWithCollidingName(symbol) {
-            if (symbol.flags & 418) {
-                var links = getSymbolLinks(symbol);
-                if (links.isDeclarationWithCollidingName === undefined) {
-                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (ts.isStatementWithLocals(container)) {
-                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
-                        if (!!resolveName(container.parent, symbol.name, 107455, undefined, undefined)) {
-                            links.isDeclarationWithCollidingName = true;
-                        }
-                        else if (nodeLinks_1.flags & 131072) {
-                            var isDeclaredInLoop = nodeLinks_1.flags & 262144;
-                            var inLoopInitializer = ts.isIterationStatement(container, false);
-                            var inLoopBodyBlock = container.kind === 199 && ts.isIterationStatement(container.parent, false);
-                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
-                        }
-                        else {
-                            links.isDeclarationWithCollidingName = false;
-                        }
-                    }
-                }
-                return links.isDeclarationWithCollidingName;
-            }
-            return false;
-        }
-        function getReferencedDeclarationWithCollidingName(node) {
-            var symbol = getReferencedValueSymbol(node);
-            return symbol && isSymbolOfDeclarationWithCollidingName(symbol) ? symbol.valueDeclaration : undefined;
-        }
-        function isDeclarationWithCollidingName(node) {
-            return isSymbolOfDeclarationWithCollidingName(getSymbolOfNode(node));
-        }
-        function isValueAliasDeclaration(node) {
-            switch (node.kind) {
-                case 229:
-                case 231:
-                case 232:
-                case 234:
-                case 238:
-                    return isAliasResolvedToValue(getSymbolOfNode(node));
-                case 236:
-                    var exportClause = node.exportClause;
-                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
-                case 235:
-                    return node.expression && node.expression.kind === 69 ? isAliasResolvedToValue(getSymbolOfNode(node)) : true;
-            }
-            return false;
-        }
-        function isTopLevelValueImportEqualsWithEntityName(node) {
-            if (node.parent.kind !== 256 || !ts.isInternalModuleImportEqualsDeclaration(node)) {
-                return false;
-            }
-            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
-            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
-        }
-        function isAliasResolvedToValue(symbol) {
-            var target = resolveAlias(symbol);
-            if (target === unknownSymbol) {
-                return true;
-            }
-            return target.flags & 107455 &&
-                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
-        }
-        function isConstEnumOrConstEnumOnlyModule(s) {
-            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
-        }
-        function isReferencedAliasDeclaration(node, checkChildren) {
-            if (ts.isAliasSymbolDeclaration(node)) {
-                var symbol = getSymbolOfNode(node);
-                if (getSymbolLinks(symbol).referenced) {
-                    return true;
-                }
-            }
-            if (checkChildren) {
-                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
-            }
-            return false;
-        }
-        function isImplementationOfOverload(node) {
-            if (ts.nodeIsPresent(node.body)) {
-                var symbol = getSymbolOfNode(node);
-                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
-                return signaturesOfSymbol.length > 1 ||
-                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
-            }
-            return false;
-        }
-        function getNodeCheckFlags(node) {
-            return getNodeLinks(node).flags;
-        }
-        function getEnumMemberValue(node) {
-            computeEnumMemberValues(node.parent);
-            return getNodeLinks(node).enumMemberValue;
-        }
-        function getConstantValue(node) {
-            if (node.kind === 255) {
-                return getEnumMemberValue(node);
-            }
-            var symbol = getNodeLinks(node).resolvedSymbol;
-            if (symbol && (symbol.flags & 8)) {
-                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
-                    return getEnumMemberValue(symbol.valueDeclaration);
-                }
-            }
-            return undefined;
-        }
-        function isFunctionType(type) {
-            return type.flags & 80896 && getSignaturesOfType(type, 0).length > 0;
-        }
-        function getTypeReferenceSerializationKind(typeName) {
-            var valueSymbol = resolveEntityName(typeName, 107455, true);
-            var constructorType = valueSymbol ? getTypeOfSymbol(valueSymbol) : undefined;
-            if (constructorType && isConstructorType(constructorType)) {
-                return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
-            }
-            var typeSymbol = resolveEntityName(typeName, 793056, true);
-            if (!typeSymbol) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            var type = getDeclaredTypeOfSymbol(typeSymbol);
-            if (type === unknownType) {
-                return ts.TypeReferenceSerializationKind.Unknown;
-            }
-            else if (type.flags & 1) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            else if (isTypeOfKind(type, 16)) {
-                return ts.TypeReferenceSerializationKind.VoidType;
-            }
-            else if (isTypeOfKind(type, 8)) {
-                return ts.TypeReferenceSerializationKind.BooleanType;
-            }
-            else if (isTypeOfKind(type, 132)) {
-                return ts.TypeReferenceSerializationKind.NumberLikeType;
-            }
-            else if (isTypeOfKind(type, 258)) {
-                return ts.TypeReferenceSerializationKind.StringLikeType;
-            }
-            else if (isTypeOfKind(type, 8192)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
-            }
-            else if (isTypeOfKind(type, 16777216)) {
-                return ts.TypeReferenceSerializationKind.ESSymbolType;
-            }
-            else if (isFunctionType(type)) {
-                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
-            }
-            else if (isArrayType(type)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
-            }
-            else {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-        }
-        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
-            var symbol = getSymbolOfNode(declaration);
-            var type = symbol && !(symbol.flags & (2048 | 131072))
-                ? getTypeOfSymbol(symbol)
-                : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
-            var signature = getSignatureFromDeclaration(signatureDeclaration);
-            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
-        }
-        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
-            var type = getWidenedType(getTypeOfExpression(expr));
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeBaseConstructorTypeOfClass(node, enclosingDeclaration, flags, writer) {
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(node));
-            resolveBaseTypesOfClass(classType);
-            var baseType = classType.resolvedBaseTypes.length ? classType.resolvedBaseTypes[0] : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(baseType, writer, enclosingDeclaration, flags);
-        }
-        function hasGlobalName(name) {
-            return ts.hasProperty(globals, name);
-        }
-        function getReferencedValueSymbol(reference) {
-            return getNodeLinks(reference).resolvedSymbol ||
-                resolveName(reference, reference.text, 107455 | 1048576 | 8388608, undefined, undefined);
-        }
-        function getReferencedValueDeclaration(reference) {
-            ts.Debug.assert(!ts.nodeIsSynthesized(reference));
-            var symbol = getReferencedValueSymbol(reference);
-            return symbol && getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
-        }
-        function createResolver() {
-            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
-            var fileToDirective;
-            if (resolvedTypeReferenceDirectives) {
-                fileToDirective = ts.createFileMap();
-                for (var key in resolvedTypeReferenceDirectives) {
-                    if (!ts.hasProperty(resolvedTypeReferenceDirectives, key)) {
-                        continue;
-                    }
-                    var resolvedDirective = resolvedTypeReferenceDirectives[key];
-                    if (!resolvedDirective) {
-                        continue;
-                    }
-                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
-                    fileToDirective.set(file.path, key);
-                }
-            }
-            return {
-                getReferencedExportContainer: getReferencedExportContainer,
-                getReferencedImportDeclaration: getReferencedImportDeclaration,
-                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
-                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
-                isValueAliasDeclaration: isValueAliasDeclaration,
-                hasGlobalName: hasGlobalName,
-                isReferencedAliasDeclaration: isReferencedAliasDeclaration,
-                getNodeCheckFlags: getNodeCheckFlags,
-                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
-                isDeclarationVisible: isDeclarationVisible,
-                isImplementationOfOverload: isImplementationOfOverload,
-                writeTypeOfDeclaration: writeTypeOfDeclaration,
-                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
-                writeTypeOfExpression: writeTypeOfExpression,
-                writeBaseConstructorTypeOfClass: writeBaseConstructorTypeOfClass,
-                isSymbolAccessible: isSymbolAccessible,
-                isEntityNameVisible: isEntityNameVisible,
-                getConstantValue: getConstantValue,
-                collectLinkedAliases: collectLinkedAliases,
-                getReferencedValueDeclaration: getReferencedValueDeclaration,
-                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
-                isOptionalParameter: isOptionalParameter,
-                moduleExportsSomeValue: moduleExportsSomeValue,
-                isArgumentsLocalBinding: isArgumentsLocalBinding,
-                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
-                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
-                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol
-            };
-            function getTypeReferenceDirectivesForEntityName(node) {
-                if (!fileToDirective) {
-                    return undefined;
-                }
-                var meaning = (node.kind === 172) || (node.kind === 69 && isInTypeQuery(node))
-                    ? 107455 | 1048576
-                    : 793056 | 1536;
-                var symbol = resolveEntityName(node, meaning, true);
-                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
-            }
-            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
-                if (!fileToDirective) {
-                    return undefined;
-                }
-                if (!isSymbolFromTypeDeclarationFile(symbol)) {
-                    return undefined;
-                }
-                var typeReferenceDirectives;
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    if (decl.symbol && decl.symbol.flags & meaning) {
-                        var file = ts.getSourceFileOfNode(decl);
-                        var typeReferenceDirective = fileToDirective.get(file.path);
-                        if (typeReferenceDirective) {
-                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
-                        }
-                    }
-                }
-                return typeReferenceDirectives;
-            }
-            function isSymbolFromTypeDeclarationFile(symbol) {
-                if (!symbol.declarations) {
-                    return false;
-                }
-                var current = symbol;
-                while (true) {
-                    var parent_12 = getParentOfSymbol(current);
-                    if (parent_12) {
-                        current = parent_12;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                if (current.valueDeclaration && current.valueDeclaration.kind === 256 && current.flags & 512) {
-                    return false;
-                }
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var file = ts.getSourceFileOfNode(decl);
-                    if (fileToDirective.contains(file.path)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-        }
-        function getExternalModuleFileFromDeclaration(declaration) {
-            var specifier = ts.getExternalModuleName(declaration);
-            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, undefined);
-            if (!moduleSymbol) {
-                return undefined;
-            }
-            return ts.getDeclarationOfKind(moduleSymbol, 256);
-        }
-        function initializeTypeChecker() {
-            ts.forEach(host.getSourceFiles(), function (file) {
-                ts.bindSourceFile(file, compilerOptions);
-            });
-            var augmentations;
-            ts.forEach(host.getSourceFiles(), function (file) {
-                if (!ts.isExternalOrCommonJsModule(file)) {
-                    mergeSymbolTable(globals, file.locals);
-                }
-                if (file.moduleAugmentations.length) {
-                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
-                }
-                if (file.symbol && file.symbol.globalExports) {
-                    mergeSymbolTable(globals, file.symbol.globalExports);
-                }
-            });
-            if (augmentations) {
-                for (var _i = 0, augmentations_1 = augmentations; _i < augmentations_1.length; _i++) {
-                    var list = augmentations_1[_i];
-                    for (var _a = 0, list_2 = list; _a < list_2.length; _a++) {
-                        var augmentation = list_2[_a];
-                        mergeModuleAugmentation(augmentation);
-                    }
-                }
-            }
-            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
-            getSymbolLinks(undefinedSymbol).type = undefinedType;
-            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
-            getSymbolLinks(unknownSymbol).type = unknownType;
-            globalArrayType = getGlobalType("Array", 1);
-            globalObjectType = getGlobalType("Object");
-            globalFunctionType = getGlobalType("Function");
-            globalStringType = getGlobalType("String");
-            globalNumberType = getGlobalType("Number");
-            globalBooleanType = getGlobalType("Boolean");
-            globalRegExpType = getGlobalType("RegExp");
-            jsxElementType = getExportedTypeFromNamespace("JSX", JsxNames.Element);
-            getGlobalClassDecoratorType = ts.memoize(function () { return getGlobalType("ClassDecorator"); });
-            getGlobalPropertyDecoratorType = ts.memoize(function () { return getGlobalType("PropertyDecorator"); });
-            getGlobalMethodDecoratorType = ts.memoize(function () { return getGlobalType("MethodDecorator"); });
-            getGlobalParameterDecoratorType = ts.memoize(function () { return getGlobalType("ParameterDecorator"); });
-            getGlobalTypedPropertyDescriptorType = ts.memoize(function () { return getGlobalType("TypedPropertyDescriptor", 1); });
-            getGlobalESSymbolConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Symbol"); });
-            getGlobalPromiseType = ts.memoize(function () { return getGlobalType("Promise", 1); });
-            tryGetGlobalPromiseType = ts.memoize(function () { return getGlobalSymbol("Promise", 793056, undefined) && getGlobalPromiseType(); });
-            getGlobalPromiseLikeType = ts.memoize(function () { return getGlobalType("PromiseLike", 1); });
-            getInstantiatedGlobalPromiseLikeType = ts.memoize(createInstantiatedPromiseLikeType);
-            getGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Promise"); });
-            getGlobalPromiseConstructorLikeType = ts.memoize(function () { return getGlobalType("PromiseConstructorLike"); });
-            getGlobalThenableType = ts.memoize(createThenableType);
-            getGlobalTemplateStringsArrayType = ts.memoize(function () { return getGlobalType("TemplateStringsArray"); });
-            if (languageVersion >= 2) {
-                getGlobalESSymbolType = ts.memoize(function () { return getGlobalType("Symbol"); });
-                getGlobalIterableType = ts.memoize(function () { return getGlobalType("Iterable", 1); });
-                getGlobalIteratorType = ts.memoize(function () { return getGlobalType("Iterator", 1); });
-                getGlobalIterableIteratorType = ts.memoize(function () { return getGlobalType("IterableIterator", 1); });
-            }
-            else {
-                getGlobalESSymbolType = ts.memoize(function () { return emptyObjectType; });
-                getGlobalIterableType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIteratorType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIterableIteratorType = ts.memoize(function () { return emptyGenericType; });
-            }
-            anyArrayType = createArrayType(anyType);
-            var symbol = getGlobalSymbol("ReadonlyArray", 793056, undefined);
-            globalReadonlyArrayType = symbol && getTypeOfGlobalSymbol(symbol, 1);
-            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
-        }
-        function createInstantiatedPromiseLikeType() {
-            var promiseLikeType = getGlobalPromiseLikeType();
-            if (promiseLikeType !== emptyGenericType) {
-                return createTypeReference(promiseLikeType, [anyType]);
-            }
-            return emptyObjectType;
-        }
-        function createThenableType() {
-            var thenPropertySymbol = createSymbol(67108864 | 4, "then");
-            getSymbolLinks(thenPropertySymbol).type = globalFunctionType;
-            var thenableType = createObjectType(65536);
-            thenableType.properties = [thenPropertySymbol];
-            thenableType.members = createSymbolTable(thenableType.properties);
-            thenableType.callSignatures = [];
-            thenableType.constructSignatures = [];
-            return thenableType;
-        }
-        function checkGrammarDecorators(node) {
-            if (!node.decorators) {
-                return false;
-            }
-            if (!ts.nodeCanBeDecorated(node)) {
-                if (node.kind === 147 && !ts.nodeIsPresent(node.body)) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
-                }
-                else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
-                }
-            }
-            else if (node.kind === 149 || node.kind === 150) {
-                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
-                }
-            }
-            return false;
-        }
-        function checkGrammarModifiers(node) {
-            switch (node.kind) {
-                case 149:
-                case 150:
-                case 148:
-                case 145:
-                case 144:
-                case 147:
-                case 146:
-                case 153:
-                case 225:
-                case 230:
-                case 229:
-                case 236:
-                case 235:
-                case 142:
-                    break;
-                case 220:
-                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 118) &&
-                        node.parent.kind !== 226 && node.parent.kind !== 256) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                case 221:
-                case 222:
-                case 200:
-                case 223:
-                    if (node.modifiers && node.parent.kind !== 226 && node.parent.kind !== 256) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                case 224:
-                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 74) &&
-                        node.parent.kind !== 226 && node.parent.kind !== 256) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                default:
-                    return false;
-            }
-            if (!node.modifiers) {
-                return;
-            }
-            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
-            var flags = 0;
-            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
-                var modifier = _a[_i];
-                if (modifier.kind !== 128) {
-                    if (node.kind === 144 || node.kind === 146) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
-                    }
-                    if (node.kind === 153) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
-                    }
-                }
-                switch (modifier.kind) {
-                    case 74:
-                        if (node.kind !== 224 && node.parent.kind === 221) {
-                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(74));
-                        }
-                        break;
-                    case 112:
-                    case 111:
-                    case 110:
-                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
-                        if (modifier.kind === 111) {
-                            lastProtected = modifier;
-                        }
-                        else if (modifier.kind === 110) {
-                            lastPrivate = modifier;
-                        }
-                        if (flags & 28) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
-                        }
-                        else if (flags & 32) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
-                        }
-                        else if (flags & 64) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
-                        }
-                        else if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
-                        }
-                        else if (node.parent.kind === 226 || node.parent.kind === 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
-                        }
-                        else if (flags & 128) {
-                            if (modifier.kind === 110) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
-                            }
-                            else {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
-                            }
-                        }
-                        flags |= ts.modifierToFlag(modifier.kind);
-                        break;
-                    case 113:
-                        if (flags & 32) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
-                        }
-                        else if (flags & 64) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
-                        }
-                        else if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
-                        }
-                        else if (node.parent.kind === 226 || node.parent.kind === 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
-                        }
-                        else if (node.kind === 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
-                        }
-                        else if (flags & 128) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                        }
-                        flags |= 32;
-                        lastStatic = modifier;
-                        break;
-                    case 128:
-                        if (flags & 64) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
-                        }
-                        else if (node.kind !== 145 && node.kind !== 144 && node.kind !== 153 && node.kind !== 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
-                        }
-                        flags |= 64;
-                        lastReadonly = modifier;
-                        break;
-                    case 82:
-                        if (flags & 1) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
-                        }
-                        else if (flags & 2) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
-                        }
-                        else if (flags & 128) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
-                        }
-                        else if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
-                        }
-                        else if (node.parent.kind === 221) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
-                        }
-                        else if (node.kind === 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
-                        }
-                        flags |= 1;
-                        break;
-                    case 122:
-                        if (flags & 2) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
-                        }
-                        else if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.parent.kind === 221) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
-                        }
-                        else if (node.kind === 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
-                        }
-                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 226) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
-                        }
-                        flags |= 2;
-                        lastDeclare = modifier;
-                        break;
-                    case 115:
-                        if (flags & 128) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
-                        }
-                        if (node.kind !== 221) {
-                            if (node.kind !== 147 &&
-                                node.kind !== 145 &&
-                                node.kind !== 149 &&
-                                node.kind !== 150) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
-                            }
-                            if (!(node.parent.kind === 221 && node.parent.flags & 128)) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
-                            }
-                            if (flags & 32) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                            }
-                            if (flags & 8) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
-                            }
-                        }
-                        flags |= 128;
-                        break;
-                    case 118:
-                        if (flags & 256) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
-                        }
-                        else if (flags & 2 || ts.isInAmbientContext(node.parent)) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.kind === 142) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
-                        }
-                        flags |= 256;
-                        lastAsync = modifier;
-                        break;
-                }
-            }
-            if (node.kind === 148) {
-                if (flags & 32) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
-                }
-                if (flags & 128) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
-                }
-                else if (flags & 256) {
-                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
-                }
-                else if (flags & 64) {
-                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
-                }
-                return;
-            }
-            else if ((node.kind === 230 || node.kind === 229) && flags & 2) {
-                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
-            }
-            else if (node.kind === 142 && (flags & 92) && ts.isBindingPattern(node.name)) {
-                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_a_binding_pattern);
-            }
-            if (flags & 256) {
-                return checkGrammarAsyncModifier(node, lastAsync);
-            }
-        }
-        function checkGrammarAsyncModifier(node, asyncModifier) {
-            if (languageVersion < 2) {
-                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
-            }
-            switch (node.kind) {
-                case 147:
-                case 220:
-                case 179:
-                case 180:
-                    if (!node.asteriskToken) {
-                        return false;
-                    }
-                    break;
-            }
-            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
-        }
-        function checkGrammarForDisallowedTrailingComma(list) {
-            if (list && list.hasTrailingComma) {
-                var start = list.end - ",".length;
-                var end = list.end;
-                var sourceFile = ts.getSourceFileOfNode(list[0]);
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
-            }
-        }
-        function checkGrammarTypeParameterList(node, typeParameters, file) {
-            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
-                return true;
-            }
-            if (typeParameters && typeParameters.length === 0) {
-                var start = typeParameters.pos - "<".length;
-                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
-                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
-            }
-        }
-        function checkGrammarParameterList(parameters) {
-            if (checkGrammarForDisallowedTrailingComma(parameters)) {
-                return true;
-            }
-            var seenOptionalParameter = false;
-            var parameterCount = parameters.length;
-            for (var i = 0; i < parameterCount; i++) {
-                var parameter = parameters[i];
-                if (parameter.dotDotDotToken) {
-                    if (i !== (parameterCount - 1)) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
-                    }
-                    if (ts.isBindingPattern(parameter.name)) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
-                    }
-                    if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
-                    }
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
-                    }
-                }
-                else if (parameter.questionToken) {
-                    seenOptionalParameter = true;
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
-                    }
-                }
-                else if (seenOptionalParameter && !parameter.initializer) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
-                }
-            }
-        }
-        function checkGrammarFunctionLikeDeclaration(node) {
-            var file = ts.getSourceFileOfNode(node);
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node, node.typeParameters, file) ||
-                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
-        }
-        function checkGrammarArrowFunction(node, file) {
-            if (node.kind === 180) {
-                var arrowFunction = node;
-                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
-                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
-                if (startLine !== endLine) {
-                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
-                }
-            }
-            return false;
-        }
-        function checkGrammarIndexSignatureParameters(node) {
-            var parameter = node.parameters[0];
-            if (node.parameters.length !== 1) {
-                if (parameter) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
-                }
-                else {
-                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
-                }
-            }
-            if (parameter.dotDotDotToken) {
-                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
-            }
-            if (parameter.flags & 1023) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
-            }
-            if (parameter.questionToken) {
-                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
-            }
-            if (parameter.initializer) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
-            }
-            if (!parameter.type) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
-            }
-            if (parameter.type.kind !== 132 && parameter.type.kind !== 130) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
-            }
-            if (!node.type) {
-                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
-            }
-        }
-        function checkGrammarIndexSignature(node) {
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
-        }
-        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
-            if (typeArguments && typeArguments.length === 0) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                var start = typeArguments.pos - "<".length;
-                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
-            }
-        }
-        function checkGrammarTypeArguments(node, typeArguments) {
-            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
-                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
-        }
-        function checkGrammarForOmittedArgument(node, args) {
-            if (args) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                for (var _i = 0, args_1 = args; _i < args_1.length; _i++) {
-                    var arg = args_1[_i];
-                    if (arg.kind === 193) {
-                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
-                    }
-                }
-            }
-        }
-        function checkGrammarArguments(node, args) {
-            return checkGrammarForDisallowedTrailingComma(args) ||
-                checkGrammarForOmittedArgument(node, args);
-        }
-        function checkGrammarHeritageClause(node) {
-            var types = node.types;
-            if (checkGrammarForDisallowedTrailingComma(types)) {
-                return true;
-            }
-            if (types && types.length === 0) {
-                var listType = ts.tokenToString(node.token);
-                var sourceFile = ts.getSourceFileOfNode(node);
-                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
-            }
-        }
-        function checkGrammarClassDeclarationHeritageClauses(node) {
-            var seenExtendsClause = false;
-            var seenImplementsClause = false;
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
-                        }
-                        if (heritageClause.types.length > 1) {
-                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
-                        }
-                        seenExtendsClause = true;
-                    }
-                    else {
-                        ts.Debug.assert(heritageClause.token === 106);
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
-                        }
-                        seenImplementsClause = true;
-                    }
-                    checkGrammarHeritageClause(heritageClause);
-                }
-            }
-        }
-        function checkGrammarInterfaceDeclaration(node) {
-            var seenExtendsClause = false;
-            if (node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        seenExtendsClause = true;
-                    }
-                    else {
-                        ts.Debug.assert(heritageClause.token === 106);
-                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
-                    }
-                    checkGrammarHeritageClause(heritageClause);
-                }
-            }
-            return false;
-        }
-        function checkGrammarComputedPropertyName(node) {
-            if (node.kind !== 140) {
-                return false;
-            }
-            var computedPropertyName = node;
-            if (computedPropertyName.expression.kind === 187 && computedPropertyName.expression.operatorToken.kind === 24) {
-                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
-            }
-        }
-        function checkGrammarForGenerator(node) {
-            if (node.asteriskToken) {
-                ts.Debug.assert(node.kind === 220 ||
-                    node.kind === 179 ||
-                    node.kind === 147);
-                if (ts.isInAmbientContext(node)) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
-                }
-                if (!node.body) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
-                }
-                if (languageVersion < 2) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
-                }
-            }
-        }
-        function checkGrammarForInvalidQuestionMark(node, questionToken, message) {
-            if (questionToken) {
-                return grammarErrorOnNode(questionToken, message);
-            }
-        }
-        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
-            var seen = {};
-            var Property = 1;
-            var GetAccessor = 2;
-            var SetAccessor = 4;
-            var GetOrSetAccessor = GetAccessor | SetAccessor;
-            var _loop_1 = function(prop) {
-                var name_20 = prop.name;
-                if (prop.kind === 193 ||
-                    name_20.kind === 140) {
-                    checkGrammarComputedPropertyName(name_20);
-                }
-                if (prop.kind === 254 && !inDestructuring && prop.objectAssignmentInitializer) {
-                    return { value: grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment) };
-                }
-                ts.forEach(prop.modifiers, function (mod) {
-                    if (mod.kind !== 118 || prop.kind !== 147) {
-                        grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
-                    }
-                });
-                var currentKind = void 0;
-                if (prop.kind === 253 || prop.kind === 254) {
-                    checkGrammarForInvalidQuestionMark(prop, prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
-                    if (name_20.kind === 8) {
-                        checkGrammarNumericLiteral(name_20);
-                    }
-                    currentKind = Property;
-                }
-                else if (prop.kind === 147) {
-                    currentKind = Property;
-                }
-                else if (prop.kind === 149) {
-                    currentKind = GetAccessor;
-                }
-                else if (prop.kind === 150) {
-                    currentKind = SetAccessor;
-                }
-                else {
-                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
-                }
-                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_20);
-                if (effectiveName === undefined) {
-                    return "continue";
-                }
-                if (!ts.hasProperty(seen, effectiveName)) {
-                    seen[effectiveName] = currentKind;
-                }
-                else {
-                    var existingKind = seen[effectiveName];
-                    if (currentKind === Property && existingKind === Property) {
-                        grammarErrorOnNode(name_20, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_20));
-                    }
-                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
-                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[effectiveName] = currentKind | existingKind;
-                        }
-                        else {
-                            return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
-                        }
-                    }
-                    else {
-                        return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name) };
-                    }
-                }
-            };
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var prop = _a[_i];
-                var state_2 = _loop_1(prop);
-                if (typeof state_2 === "object") return state_2.value;
-            }
-        }
-        function checkGrammarJsxElement(node) {
-            var seen = {};
-            for (var _i = 0, _a = node.attributes; _i < _a.length; _i++) {
-                var attr = _a[_i];
-                if (attr.kind === 247) {
-                    continue;
-                }
-                var jsxAttr = attr;
-                var name_21 = jsxAttr.name;
-                if (!ts.hasProperty(seen, name_21.text)) {
-                    seen[name_21.text] = true;
-                }
-                else {
-                    return grammarErrorOnNode(name_21, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
-                }
-                var initializer = jsxAttr.initializer;
-                if (initializer && initializer.kind === 248 && !initializer.expression) {
-                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
-                }
-            }
-        }
-        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
-            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
-                return true;
-            }
-            if (forInOrOfStatement.initializer.kind === 219) {
-                var variableList = forInOrOfStatement.initializer;
-                if (!checkGrammarVariableDeclarationList(variableList)) {
-                    var declarations = variableList.declarations;
-                    if (!declarations.length) {
-                        return false;
-                    }
-                    if (declarations.length > 1) {
-                        var diagnostic = forInOrOfStatement.kind === 207
-                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
-                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
-                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
-                    }
-                    var firstDeclaration = declarations[0];
-                    if (firstDeclaration.initializer) {
-                        var diagnostic = forInOrOfStatement.kind === 207
-                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
-                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
-                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
-                    }
-                    if (firstDeclaration.type) {
-                        var diagnostic = forInOrOfStatement.kind === 207
-                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
-                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
-                        return grammarErrorOnNode(firstDeclaration, diagnostic);
-                    }
-                }
-            }
-            return false;
-        }
-        function checkGrammarAccessor(accessor) {
-            var kind = accessor.kind;
-            if (languageVersion < 1) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
-            }
-            else if (ts.isInAmbientContext(accessor)) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
-            }
-            else if (accessor.body === undefined && !(accessor.flags & 128)) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
-            }
-            else if (accessor.typeParameters) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
-            }
-            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
-                return grammarErrorOnNode(accessor.name, kind === 149 ?
-                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
-                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
-            }
-            else if (kind === 150) {
-                if (accessor.type) {
-                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
-                }
-                else {
-                    var parameter = accessor.parameters[0];
-                    if (parameter.dotDotDotToken) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
-                    }
-                    else if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
-                    }
-                    else if (parameter.initializer) {
-                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
-                    }
-                }
-            }
-        }
-        function doesAccessorHaveCorrectParameterCount(accessor) {
-            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 149 ? 0 : 1);
-        }
-        function getAccessorThisParameter(accessor) {
-            if (accessor.parameters.length === (accessor.kind === 149 ? 1 : 2) &&
-                accessor.parameters[0].name.kind === 69 &&
-                accessor.parameters[0].name.originalKeywordKind === 97) {
-                return accessor.parameters[0];
-            }
-        }
-        function checkGrammarForNonSymbolComputedProperty(node, message) {
-            if (ts.isDynamicName(node)) {
-                return grammarErrorOnNode(node, message);
-            }
-        }
-        function checkGrammarMethod(node) {
-            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
-                checkGrammarFunctionLikeDeclaration(node) ||
-                checkGrammarForGenerator(node)) {
-                return true;
-            }
-            if (node.parent.kind === 171) {
-                if (checkGrammarForInvalidQuestionMark(node, node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
-                    return true;
-                }
-                else if (node.body === undefined) {
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
-                }
-            }
-            if (ts.isClassLike(node.parent)) {
-                if (ts.isInAmbientContext(node)) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
-                }
-                else if (!node.body) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
-                }
-            }
-            else if (node.parent.kind === 222) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
-            }
-            else if (node.parent.kind === 159) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
-            }
-        }
-        function checkGrammarBreakOrContinueStatement(node) {
-            var current = node;
-            while (current) {
-                if (ts.isFunctionLike(current)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
-                }
-                switch (current.kind) {
-                    case 214:
-                        if (node.label && current.label.text === node.label.text) {
-                            var isMisplacedContinueLabel = node.kind === 209
-                                && !ts.isIterationStatement(current.statement, true);
-                            if (isMisplacedContinueLabel) {
-                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
-                            }
-                            return false;
-                        }
-                        break;
-                    case 213:
-                        if (node.kind === 210 && !node.label) {
-                            return false;
-                        }
-                        break;
-                    default:
-                        if (ts.isIterationStatement(current, false) && !node.label) {
-                            return false;
-                        }
-                        break;
-                }
-                current = current.parent;
-            }
-            if (node.label) {
-                var message = node.kind === 210
-                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-            else {
-                var message = node.kind === 210
-                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-        }
-        function checkGrammarBindingElement(node) {
-            if (node.dotDotDotToken) {
-                var elements = node.parent.elements;
-                if (node !== ts.lastOrUndefined(elements)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
-                }
-                if (node.name.kind === 168 || node.name.kind === 167) {
-                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
-                }
-                if (node.initializer) {
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
-                }
-            }
-        }
-        function checkGrammarVariableDeclaration(node) {
-            if (node.parent.parent.kind !== 207 && node.parent.parent.kind !== 208) {
-                if (ts.isInAmbientContext(node)) {
-                    if (node.initializer) {
-                        var equalsTokenLength = "=".length;
-                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-                    }
-                }
-                else if (!node.initializer) {
-                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
-                    }
-                    if (ts.isConst(node)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
-                    }
-                }
-            }
-            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
-            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
-        }
-        function checkGrammarNameInLetOrConstDeclarations(name) {
-            if (name.kind === 69) {
-                if (name.originalKeywordKind === 108) {
-                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
-                }
-            }
-            else {
-                var elements = name.elements;
-                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
-                    var element = elements_2[_i];
-                    if (element.kind !== 193) {
-                        checkGrammarNameInLetOrConstDeclarations(element.name);
-                    }
-                }
-            }
-        }
-        function checkGrammarVariableDeclarationList(declarationList) {
-            var declarations = declarationList.declarations;
-            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
-                return true;
-            }
-            if (!declarationList.declarations.length) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
-            }
-        }
-        function allowLetAndConstDeclarations(parent) {
-            switch (parent.kind) {
-                case 203:
-                case 204:
-                case 205:
-                case 212:
-                case 206:
-                case 207:
-                case 208:
-                    return false;
-                case 214:
-                    return allowLetAndConstDeclarations(parent.parent);
-            }
-            return true;
-        }
-        function checkGrammarForDisallowedLetOrConstStatement(node) {
-            if (!allowLetAndConstDeclarations(node.parent)) {
-                if (ts.isLet(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
-                }
-                else if (ts.isConst(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
-                }
-            }
-        }
-        function hasParseDiagnostics(sourceFile) {
-            return sourceFile.parseDiagnostics.length > 0;
-        }
-        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function checkGrammarConstructorTypeParameters(node) {
-            if (node.typeParameters) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
-            }
-        }
-        function checkGrammarConstructorTypeAnnotation(node) {
-            if (node.type) {
-                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
-            }
-        }
-        function checkGrammarProperty(node) {
-            if (ts.isClassLike(node.parent)) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-            }
-            else if (node.parent.kind === 222) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
-                }
-            }
-            else if (node.parent.kind === 159) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
-                }
-            }
-            if (ts.isInAmbientContext(node) && node.initializer) {
-                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-            }
-        }
-        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
-            if (node.kind === 222 ||
-                node.kind === 223 ||
-                node.kind === 230 ||
-                node.kind === 229 ||
-                node.kind === 236 ||
-                node.kind === 235 ||
-                (node.flags & 2) ||
-                (node.flags & (1 | 512))) {
-                return false;
-            }
-            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
-        }
-        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
-            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
-                var decl = _a[_i];
-                if (ts.isDeclaration(decl) || decl.kind === 200) {
-                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
-                        return true;
-                    }
-                }
-            }
-        }
-        function checkGrammarSourceFile(node) {
-            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
-        }
-        function checkGrammarStatementInAmbientContext(node) {
-            if (ts.isInAmbientContext(node)) {
-                if (isAccessor(node.parent.kind)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
-                }
-                var links = getNodeLinks(node);
-                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
-                }
-                if (node.parent.kind === 199 || node.parent.kind === 226 || node.parent.kind === 256) {
-                    var links_1 = getNodeLinks(node.parent);
-                    if (!links_1.hasReportedStatementInAmbientContext) {
-                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
-                    }
-                }
-                else {
-                }
-            }
-        }
-        function checkGrammarNumericLiteral(node) {
-            if (node.isOctalLiteral && languageVersion >= 1) {
-                return grammarErrorOnNode(node, ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
-            }
-        }
-        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span), 0, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        var _a;
-    }
-    ts.createTypeChecker = createTypeChecker;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var nullSourceMapWriter;
-    var defaultLastEncodedSourceMapSpan = {
-        emittedLine: 1,
-        emittedColumn: 1,
-        sourceLine: 1,
-        sourceColumn: 1,
-        sourceIndex: 0
-    };
-    function getNullSourceMapWriter() {
-        if (nullSourceMapWriter === undefined) {
-            nullSourceMapWriter = {
-                getSourceMapData: function () { return undefined; },
-                setSourceFile: function (sourceFile) { },
-                emitStart: function (range) { },
-                emitEnd: function (range, stopOverridingSpan) { },
-                emitPos: function (pos) { },
-                changeEmitSourcePos: function () { },
-                getText: function () { return undefined; },
-                getSourceMappingURL: function () { return undefined; },
-                initialize: function (filePath, sourceMapFilePath, sourceFiles, isBundledEmit) { },
-                reset: function () { }
-            };
-        }
-        return nullSourceMapWriter;
-    }
-    ts.getNullSourceMapWriter = getNullSourceMapWriter;
-    function createSourceMapWriter(host, writer) {
-        var compilerOptions = host.getCompilerOptions();
-        var currentSourceFile;
-        var sourceMapDir;
-        var stopOverridingSpan = false;
-        var modifyLastSourcePos = false;
-        var sourceMapSourceIndex;
-        var lastRecordedSourceMapSpan;
-        var lastEncodedSourceMapSpan;
-        var lastEncodedNameIndex;
-        var sourceMapData;
-        return {
-            getSourceMapData: function () { return sourceMapData; },
-            setSourceFile: setSourceFile,
-            emitPos: emitPos,
-            emitStart: emitStart,
-            emitEnd: emitEnd,
-            changeEmitSourcePos: changeEmitSourcePos,
-            getText: getText,
-            getSourceMappingURL: getSourceMappingURL,
-            initialize: initialize,
-            reset: reset
-        };
-        function initialize(filePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
-            if (sourceMapData) {
-                reset();
-            }
-            currentSourceFile = undefined;
-            sourceMapSourceIndex = -1;
-            lastRecordedSourceMapSpan = undefined;
-            lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
-            lastEncodedNameIndex = 0;
-            sourceMapData = {
-                sourceMapFilePath: sourceMapFilePath,
-                jsSourceMappingURL: !compilerOptions.inlineSourceMap ? ts.getBaseFileName(ts.normalizeSlashes(sourceMapFilePath)) : undefined,
-                sourceMapFile: ts.getBaseFileName(ts.normalizeSlashes(filePath)),
-                sourceMapSourceRoot: compilerOptions.sourceRoot || "",
-                sourceMapSources: [],
-                inputSourceFileNames: [],
-                sourceMapNames: [],
-                sourceMapMappings: "",
-                sourceMapSourcesContent: compilerOptions.inlineSources ? [] : undefined,
-                sourceMapDecodedMappings: []
-            };
-            sourceMapData.sourceMapSourceRoot = ts.normalizeSlashes(sourceMapData.sourceMapSourceRoot);
-            if (sourceMapData.sourceMapSourceRoot.length && sourceMapData.sourceMapSourceRoot.charCodeAt(sourceMapData.sourceMapSourceRoot.length - 1) !== 47) {
-                sourceMapData.sourceMapSourceRoot += ts.directorySeparator;
-            }
-            if (compilerOptions.mapRoot) {
-                sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
-                if (!isBundledEmit) {
-                    ts.Debug.assert(sourceFiles.length === 1);
-                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFiles[0], host, sourceMapDir));
-                }
-                if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
-                    sourceMapDir = ts.combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
-                    sourceMapData.jsSourceMappingURL = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizePath(filePath)), ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), host.getCurrentDirectory(), host.getCanonicalFileName, true);
-                }
-                else {
-                    sourceMapData.jsSourceMappingURL = ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL);
-                }
-            }
-            else {
-                sourceMapDir = ts.getDirectoryPath(ts.normalizePath(filePath));
-            }
-        }
-        function reset() {
-            currentSourceFile = undefined;
-            sourceMapDir = undefined;
-            sourceMapSourceIndex = undefined;
-            lastRecordedSourceMapSpan = undefined;
-            lastEncodedSourceMapSpan = undefined;
-            lastEncodedNameIndex = undefined;
-            sourceMapData = undefined;
-        }
-        function updateLastEncodedAndRecordedSpans() {
-            if (modifyLastSourcePos) {
-                modifyLastSourcePos = false;
-                lastRecordedSourceMapSpan.emittedLine = lastEncodedSourceMapSpan.emittedLine;
-                lastRecordedSourceMapSpan.emittedColumn = lastEncodedSourceMapSpan.emittedColumn;
-                sourceMapData.sourceMapDecodedMappings.pop();
-                lastEncodedSourceMapSpan = sourceMapData.sourceMapDecodedMappings.length ?
-                    sourceMapData.sourceMapDecodedMappings[sourceMapData.sourceMapDecodedMappings.length - 1] :
-                    defaultLastEncodedSourceMapSpan;
-                var sourceMapMappings = sourceMapData.sourceMapMappings;
-                var lenthToSet = sourceMapMappings.length - 1;
-                for (; lenthToSet >= 0; lenthToSet--) {
-                    var currentChar = sourceMapMappings.charAt(lenthToSet);
-                    if (currentChar === ",") {
-                        break;
-                    }
-                    if (currentChar === ";" && lenthToSet !== 0 && sourceMapMappings.charAt(lenthToSet - 1) !== ";") {
-                        break;
-                    }
-                }
-                sourceMapData.sourceMapMappings = sourceMapMappings.substr(0, Math.max(0, lenthToSet));
-            }
-        }
-        function encodeLastRecordedSourceMapSpan() {
-            if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) {
-                return;
-            }
-            var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn;
-            if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) {
-                if (sourceMapData.sourceMapMappings) {
-                    sourceMapData.sourceMapMappings += ",";
-                }
-            }
-            else {
-                for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) {
-                    sourceMapData.sourceMapMappings += ";";
-                }
-                prevEncodedEmittedColumn = 1;
-            }
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn);
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex);
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine);
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn);
-            if (lastRecordedSourceMapSpan.nameIndex >= 0) {
-                ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this");
-                sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex);
-                lastEncodedNameIndex = lastRecordedSourceMapSpan.nameIndex;
-            }
-            lastEncodedSourceMapSpan = lastRecordedSourceMapSpan;
-            sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan);
-        }
-        function emitPos(pos) {
-            if (pos === -1) {
-                return;
-            }
-            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSourceFile, pos);
-            sourceLinePos.line++;
-            sourceLinePos.character++;
-            var emittedLine = writer.getLine();
-            var emittedColumn = writer.getColumn();
-            if (!lastRecordedSourceMapSpan ||
-                lastRecordedSourceMapSpan.emittedLine !== emittedLine ||
-                lastRecordedSourceMapSpan.emittedColumn !== emittedColumn ||
-                (lastRecordedSourceMapSpan.sourceIndex === sourceMapSourceIndex &&
-                    (lastRecordedSourceMapSpan.sourceLine > sourceLinePos.line ||
-                        (lastRecordedSourceMapSpan.sourceLine === sourceLinePos.line && lastRecordedSourceMapSpan.sourceColumn > sourceLinePos.character)))) {
-                encodeLastRecordedSourceMapSpan();
-                lastRecordedSourceMapSpan = {
-                    emittedLine: emittedLine,
-                    emittedColumn: emittedColumn,
-                    sourceLine: sourceLinePos.line,
-                    sourceColumn: sourceLinePos.character,
-                    sourceIndex: sourceMapSourceIndex
-                };
-                stopOverridingSpan = false;
-            }
-            else if (!stopOverridingSpan) {
-                lastRecordedSourceMapSpan.sourceLine = sourceLinePos.line;
-                lastRecordedSourceMapSpan.sourceColumn = sourceLinePos.character;
-                lastRecordedSourceMapSpan.sourceIndex = sourceMapSourceIndex;
-            }
-            updateLastEncodedAndRecordedSpans();
-        }
-        function getStartPos(range) {
-            var rangeHasDecorators = !!range.decorators;
-            return range.pos !== -1 ? ts.skipTrivia(currentSourceFile.text, rangeHasDecorators ? range.decorators.end : range.pos) : -1;
-        }
-        function emitStart(range) {
-            emitPos(getStartPos(range));
-        }
-        function emitEnd(range, stopOverridingEnd) {
-            emitPos(range.end);
-            stopOverridingSpan = stopOverridingEnd;
-        }
-        function changeEmitSourcePos() {
-            ts.Debug.assert(!modifyLastSourcePos);
-            modifyLastSourcePos = true;
-        }
-        function setSourceFile(sourceFile) {
-            currentSourceFile = sourceFile;
-            var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
-            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSourceFile.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, true);
-            sourceMapSourceIndex = ts.indexOf(sourceMapData.sourceMapSources, source);
-            if (sourceMapSourceIndex === -1) {
-                sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
-                sourceMapData.sourceMapSources.push(source);
-                sourceMapData.inputSourceFileNames.push(sourceFile.fileName);
-                if (compilerOptions.inlineSources) {
-                    sourceMapData.sourceMapSourcesContent.push(sourceFile.text);
-                }
-            }
-        }
-        function getText() {
-            encodeLastRecordedSourceMapSpan();
-            return ts.stringify({
-                version: 3,
-                file: sourceMapData.sourceMapFile,
-                sourceRoot: sourceMapData.sourceMapSourceRoot,
-                sources: sourceMapData.sourceMapSources,
-                names: sourceMapData.sourceMapNames,
-                mappings: sourceMapData.sourceMapMappings,
-                sourcesContent: sourceMapData.sourceMapSourcesContent
-            });
-        }
-        function getSourceMappingURL() {
-            if (compilerOptions.inlineSourceMap) {
-                var base64SourceMapText = ts.convertToBase64(getText());
-                return sourceMapData.jsSourceMappingURL = "data:application/json;base64," + base64SourceMapText;
-            }
-            else {
-                return sourceMapData.jsSourceMappingURL;
-            }
-        }
-    }
-    ts.createSourceMapWriter = createSourceMapWriter;
-    var base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-    function base64FormatEncode(inValue) {
-        if (inValue < 64) {
-            return base64Chars.charAt(inValue);
-        }
-        throw TypeError(inValue + ": not a 64 based value");
-    }
-    function base64VLQFormatEncode(inValue) {
-        if (inValue < 0) {
-            inValue = ((-inValue) << 1) + 1;
-        }
-        else {
-            inValue = inValue << 1;
-        }
-        var encodedStr = "";
-        do {
-            var currentDigit = inValue & 31;
-            inValue = inValue >> 5;
-            if (inValue > 0) {
-                currentDigit = currentDigit | 32;
-            }
-            encodedStr = encodedStr + base64FormatEncode(currentDigit);
-        } while (inValue > 0);
-        return encodedStr;
-    }
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
-        var declarationDiagnostics = ts.createDiagnosticCollection();
-        ts.forEachExpectedEmitFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
-        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
-        function getDeclarationDiagnosticsFromFile(_a, sources, isBundledEmit) {
-            var declarationFilePath = _a.declarationFilePath;
-            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sources, isBundledEmit);
-        }
-    }
-    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
-    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit) {
-        var newLine = host.getNewLine();
-        var compilerOptions = host.getCompilerOptions();
-        var write;
-        var writeLine;
-        var increaseIndent;
-        var decreaseIndent;
-        var writeTextOfNode;
-        var writer;
-        createAndSetNewTextWriterWithSymbolWriter();
-        var enclosingDeclaration;
-        var resultHasExternalModuleIndicator;
-        var currentText;
-        var currentLineMap;
-        var currentIdentifiers;
-        var isCurrentFileExternalModule;
-        var reportedDeclarationError = false;
-        var errorNameNode;
-        var emitJsDocComments = compilerOptions.removeComments ? function (declaration) { } : writeJsDocComments;
-        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
-        var noDeclare;
-        var moduleElementDeclarationEmitInfo = [];
-        var asynchronousSubModuleDeclarationEmitInfo;
-        var referencesOutput = "";
-        var usedTypeDirectiveReferences;
-        var emittedReferencedFiles = [];
-        var addedGlobalFileReference = false;
-        var allSourcesModuleElementDeclarationEmitInfo = [];
-        ts.forEach(sourceFiles, function (sourceFile) {
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                return;
-            }
-            if (!compilerOptions.noResolve) {
-                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
-                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
-                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
-                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference)) {
-                            addedGlobalFileReference = true;
-                        }
-                        emittedReferencedFiles.push(referencedFile);
-                    }
-                });
-            }
-            resultHasExternalModuleIndicator = false;
-            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
-                noDeclare = false;
-                emitSourceFile(sourceFile);
-            }
-            else if (ts.isExternalModule(sourceFile)) {
-                noDeclare = true;
-                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
-                writeLine();
-                increaseIndent();
-                emitSourceFile(sourceFile);
-                decreaseIndent();
-                write("}");
-                writeLine();
-            }
-            if (moduleElementDeclarationEmitInfo.length) {
-                var oldWriter = writer;
-                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
-                        ts.Debug.assert(aliasEmitInfo.node.kind === 230);
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            increaseIndent();
-                        }
-                        writeImportDeclaration(aliasEmitInfo.node);
-                        aliasEmitInfo.asynchronousOutput = writer.getText();
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            decreaseIndent();
-                        }
-                    }
-                });
-                setWriter(oldWriter);
-                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
-                moduleElementDeclarationEmitInfo = [];
-            }
-            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
-                write("export {};");
-                writeLine();
-            }
-        });
-        if (usedTypeDirectiveReferences) {
-            for (var directive in usedTypeDirectiveReferences) {
-                if (ts.hasProperty(usedTypeDirectiveReferences, directive)) {
-                    referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
-                }
-            }
-        }
-        return {
-            reportedDeclarationError: reportedDeclarationError,
-            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
-            synchronousDeclarationOutput: writer.getText(),
-            referencesOutput: referencesOutput
-        };
-        function hasInternalAnnotation(range) {
-            var comment = currentText.substring(range.pos, range.end);
-            return comment.indexOf("@internal") >= 0;
-        }
-        function stripInternal(node) {
-            if (node) {
-                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
-                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
-                    return;
-                }
-                emitNode(node);
-            }
-        }
-        function createAndSetNewTextWriterWithSymbolWriter() {
-            var writer = ts.createTextWriter(newLine);
-            writer.trackSymbol = trackSymbol;
-            writer.reportInaccessibleThisError = reportInaccessibleThisError;
-            writer.writeKeyword = writer.write;
-            writer.writeOperator = writer.write;
-            writer.writePunctuation = writer.write;
-            writer.writeSpace = writer.write;
-            writer.writeStringLiteral = writer.writeLiteral;
-            writer.writeParameter = writer.write;
-            writer.writeSymbol = writer.write;
-            setWriter(writer);
-        }
-        function setWriter(newWriter) {
-            writer = newWriter;
-            write = newWriter.write;
-            writeTextOfNode = newWriter.writeTextOfNode;
-            writeLine = newWriter.writeLine;
-            increaseIndent = newWriter.increaseIndent;
-            decreaseIndent = newWriter.decreaseIndent;
-        }
-        function writeAsynchronousModuleElements(nodes) {
-            var oldWriter = writer;
-            ts.forEach(nodes, function (declaration) {
-                var nodeToCheck;
-                if (declaration.kind === 218) {
-                    nodeToCheck = declaration.parent.parent;
-                }
-                else if (declaration.kind === 233 || declaration.kind === 234 || declaration.kind === 231) {
-                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
-                }
-                else {
-                    nodeToCheck = declaration;
-                }
-                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
-                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                }
-                if (moduleElementEmitInfo) {
-                    if (moduleElementEmitInfo.node.kind === 230) {
-                        moduleElementEmitInfo.isVisible = true;
-                    }
-                    else {
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
-                            increaseIndent();
-                        }
-                        if (nodeToCheck.kind === 225) {
-                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
-                            asynchronousSubModuleDeclarationEmitInfo = [];
-                        }
-                        writeModuleElement(nodeToCheck);
-                        if (nodeToCheck.kind === 225) {
-                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
-                            asynchronousSubModuleDeclarationEmitInfo = undefined;
-                        }
-                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
-                    }
-                }
-            });
-            setWriter(oldWriter);
-        }
-        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
-            if (!typeReferenceDirectives) {
-                return;
-            }
-            if (!usedTypeDirectiveReferences) {
-                usedTypeDirectiveReferences = {};
-            }
-            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
-                var directive = typeReferenceDirectives_1[_i];
-                if (!ts.hasProperty(usedTypeDirectiveReferences, directive)) {
-                    usedTypeDirectiveReferences[directive] = directive;
-                }
-            }
-        }
-        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
-            if (symbolAccessibilityResult.accessibility === 0) {
-                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
-                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
-                }
-            }
-            else {
-                reportedDeclarationError = true;
-                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
-                if (errorInfo) {
-                    if (errorInfo.typeName) {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                    else {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                }
-            }
-        }
-        function trackSymbol(symbol, enclosingDeclaration, meaning) {
-            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning));
-            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
-        }
-        function reportInaccessibleThisError() {
-            if (errorNameNode) {
-                reportedDeclarationError = true;
-                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
-            }
-        }
-        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (type) {
-                emitType(type);
-            }
-            else {
-                errorNameNode = declaration.name;
-                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, 2, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (signature.type) {
-                emitType(signature.type);
-            }
-            else {
-                errorNameNode = signature.name;
-                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 2, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function emitLines(nodes) {
-            for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
-                var node = nodes_2[_i];
-                emit(node);
-            }
-        }
-        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
-            var currentWriterPos = writer.getTextPos();
-            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
-                var node = nodes_3[_i];
-                if (!canEmitFn || canEmitFn(node)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        write(separator);
-                    }
-                    currentWriterPos = writer.getTextPos();
-                    eachNodeEmitFn(node);
-                }
-            }
-        }
-        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
-            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
-        }
-        function writeJsDocComments(declaration) {
-            if (declaration) {
-                var jsDocComments = ts.getJsDocCommentsFromText(declaration, currentText);
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
-                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, true, newLine, ts.writeCommentRange);
-            }
-        }
-        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            emitType(type);
-        }
-        function emitType(type) {
-            switch (type.kind) {
-                case 117:
-                case 132:
-                case 130:
-                case 120:
-                case 133:
-                case 103:
-                case 135:
-                case 93:
-                case 127:
-                case 165:
-                case 166:
-                    return writeTextOfNode(currentText, type);
-                case 194:
-                    return emitExpressionWithTypeArguments(type);
-                case 155:
-                    return emitTypeReference(type);
-                case 158:
-                    return emitTypeQuery(type);
-                case 160:
-                    return emitArrayType(type);
-                case 161:
-                    return emitTupleType(type);
-                case 162:
-                    return emitUnionType(type);
-                case 163:
-                    return emitIntersectionType(type);
-                case 164:
-                    return emitParenType(type);
-                case 156:
-                case 157:
-                    return emitSignatureDeclarationWithJsDocComments(type);
-                case 159:
-                    return emitTypeLiteral(type);
-                case 69:
-                    return emitEntityName(type);
-                case 139:
-                    return emitEntityName(type);
-                case 154:
-                    return emitTypePredicate(type);
-            }
-            function writeEntityName(entityName) {
-                if (entityName.kind === 69) {
-                    writeTextOfNode(currentText, entityName);
-                }
-                else {
-                    var left = entityName.kind === 139 ? entityName.left : entityName.expression;
-                    var right = entityName.kind === 139 ? entityName.right : entityName.name;
-                    writeEntityName(left);
-                    write(".");
-                    writeTextOfNode(currentText, right);
-                }
-            }
-            function emitEntityName(entityName) {
-                var visibilityResult = resolver.isEntityNameVisible(entityName, entityName.parent.kind === 229 ? entityName.parent : enclosingDeclaration);
-                handleSymbolAccessibilityError(visibilityResult);
-                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
-                writeEntityName(entityName);
-            }
-            function emitExpressionWithTypeArguments(node) {
-                if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                    ts.Debug.assert(node.expression.kind === 69 || node.expression.kind === 172);
-                    emitEntityName(node.expression);
-                    if (node.typeArguments) {
-                        write("<");
-                        emitCommaList(node.typeArguments, emitType);
-                        write(">");
-                    }
-                }
-            }
-            function emitTypeReference(type) {
-                emitEntityName(type.typeName);
-                if (type.typeArguments) {
-                    write("<");
-                    emitCommaList(type.typeArguments, emitType);
-                    write(">");
-                }
-            }
-            function emitTypePredicate(type) {
-                writeTextOfNode(currentText, type.parameterName);
-                write(" is ");
-                emitType(type.type);
-            }
-            function emitTypeQuery(type) {
-                write("typeof ");
-                emitEntityName(type.exprName);
-            }
-            function emitArrayType(type) {
-                emitType(type.elementType);
-                write("[]");
-            }
-            function emitTupleType(type) {
-                write("[");
-                emitCommaList(type.elementTypes, emitType);
-                write("]");
-            }
-            function emitUnionType(type) {
-                emitSeparatedList(type.types, " | ", emitType);
-            }
-            function emitIntersectionType(type) {
-                emitSeparatedList(type.types, " & ", emitType);
-            }
-            function emitParenType(type) {
-                write("(");
-                emitType(type.type);
-                write(")");
-            }
-            function emitTypeLiteral(type) {
-                write("{");
-                if (type.members.length) {
-                    writeLine();
-                    increaseIndent();
-                    emitLines(type.members);
-                    decreaseIndent();
-                }
-                write("}");
-            }
-        }
-        function emitSourceFile(node) {
-            currentText = node.text;
-            currentLineMap = ts.getLineStarts(node);
-            currentIdentifiers = node.identifiers;
-            isCurrentFileExternalModule = ts.isExternalModule(node);
-            enclosingDeclaration = node;
-            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, true);
-            emitLines(node.statements);
-        }
-        function getExportDefaultTempVariableName() {
-            var baseName = "_default";
-            if (!ts.hasProperty(currentIdentifiers, baseName)) {
-                return baseName;
-            }
-            var count = 0;
-            while (true) {
-                count++;
-                var name_22 = baseName + "_" + count;
-                if (!ts.hasProperty(currentIdentifiers, name_22)) {
-                    return name_22;
-                }
-            }
-        }
-        function emitExportAssignment(node) {
-            if (node.expression.kind === 69) {
-                write(node.isExportEquals ? "export = " : "export default ");
-                writeTextOfNode(currentText, node.expression);
-            }
-            else {
-                var tempVarName = getExportDefaultTempVariableName();
-                if (!noDeclare) {
-                    write("declare ");
-                }
-                write("var ");
-                write(tempVarName);
-                write(": ");
-                writer.getSymbolAccessibilityDiagnostic = getDefaultExportAccessibilityDiagnostic;
-                resolver.writeTypeOfExpression(node.expression, enclosingDeclaration, 2, writer);
-                write(";");
-                writeLine();
-                write(node.isExportEquals ? "export = " : "export default ");
-                write(tempVarName);
-            }
-            write(";");
-            writeLine();
-            if (node.expression.kind === 69) {
-                var nodes = resolver.collectLinkedAliases(node.expression);
-                writeAsynchronousModuleElements(nodes);
-            }
-            function getDefaultExportAccessibilityDiagnostic(diagnostic) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
-                    errorNode: node
-                };
-            }
-        }
-        function isModuleElementVisible(node) {
-            return resolver.isDeclarationVisible(node);
-        }
-        function emitModuleElement(node, isModuleElementVisible) {
-            if (isModuleElementVisible) {
-                writeModuleElement(node);
-            }
-            else if (node.kind === 229 ||
-                (node.parent.kind === 256 && isCurrentFileExternalModule)) {
-                var isVisible = void 0;
-                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 256) {
-                    asynchronousSubModuleDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-                else {
-                    if (node.kind === 230) {
-                        var importDeclaration = node;
-                        if (importDeclaration.importClause) {
-                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
-                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
-                        }
-                    }
-                    moduleElementDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-            }
-        }
-        function writeModuleElement(node) {
-            switch (node.kind) {
-                case 220:
-                    return writeFunctionDeclaration(node);
-                case 200:
-                    return writeVariableStatement(node);
-                case 222:
-                    return writeInterfaceDeclaration(node);
-                case 221:
-                    return writeClassDeclaration(node);
-                case 223:
-                    return writeTypeAliasDeclaration(node);
-                case 224:
-                    return writeEnumDeclaration(node);
-                case 225:
-                    return writeModuleDeclaration(node);
-                case 229:
-                    return writeImportEqualsDeclaration(node);
-                case 230:
-                    return writeImportDeclaration(node);
-                default:
-                    ts.Debug.fail("Unknown symbol kind");
-            }
-        }
-        function emitModuleElementDeclarationFlags(node) {
-            if (node.parent.kind === 256) {
-                if (node.flags & 1) {
-                    write("export ");
-                }
-                if (node.flags & 512) {
-                    write("default ");
-                }
-                else if (node.kind !== 222 && !noDeclare) {
-                    write("declare ");
-                }
-            }
-        }
-        function emitClassMemberDeclarationFlags(flags) {
-            if (flags & 8) {
-                write("private ");
-            }
-            else if (flags & 16) {
-                write("protected ");
-            }
-            if (flags & 32) {
-                write("static ");
-            }
-            if (flags & 64) {
-                write("readonly ");
-            }
-            if (flags & 128) {
-                write("abstract ");
-            }
-        }
-        function writeImportEqualsDeclaration(node) {
-            emitJsDocComments(node);
-            if (node.flags & 1) {
-                write("export ");
-            }
-            write("import ");
-            writeTextOfNode(currentText, node.name);
-            write(" = ");
-            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
-                write(";");
-            }
-            else {
-                write("require(");
-                emitExternalModuleSpecifier(node);
-                write(");");
-            }
-            writer.writeLine();
-            function getImportEntityNameVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
-                    errorNode: node,
-                    typeName: node.name
-                };
-            }
-        }
-        function isVisibleNamedBinding(namedBindings) {
-            if (namedBindings) {
-                if (namedBindings.kind === 232) {
-                    return resolver.isDeclarationVisible(namedBindings);
-                }
-                else {
-                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
-                }
-            }
-        }
-        function writeImportDeclaration(node) {
-            emitJsDocComments(node);
-            if (node.flags & 1) {
-                write("export ");
-            }
-            write("import ");
-            if (node.importClause) {
-                var currentWriterPos = writer.getTextPos();
-                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
-                    writeTextOfNode(currentText, node.importClause.name);
-                }
-                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        write(", ");
-                    }
-                    if (node.importClause.namedBindings.kind === 232) {
-                        write("* as ");
-                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
-                    }
-                    else {
-                        write("{ ");
-                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
-                        write(" }");
-                    }
-                }
-                write(" from ");
-            }
-            emitExternalModuleSpecifier(node);
-            write(";");
-            writer.writeLine();
-        }
-        function emitExternalModuleSpecifier(parent) {
-            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 225;
-            var moduleSpecifier;
-            if (parent.kind === 229) {
-                var node = parent;
-                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
-            }
-            else if (parent.kind === 225) {
-                moduleSpecifier = parent.name;
-            }
-            else {
-                var node = parent;
-                moduleSpecifier = node.moduleSpecifier;
-            }
-            if (moduleSpecifier.kind === 9 && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
-                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
-                if (moduleName) {
-                    write('"');
-                    write(moduleName);
-                    write('"');
-                    return;
-                }
-            }
-            writeTextOfNode(currentText, moduleSpecifier);
-        }
-        function emitImportOrExportSpecifier(node) {
-            if (node.propertyName) {
-                writeTextOfNode(currentText, node.propertyName);
-                write(" as ");
-            }
-            writeTextOfNode(currentText, node.name);
-        }
-        function emitExportSpecifier(node) {
-            emitImportOrExportSpecifier(node);
-            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
-            writeAsynchronousModuleElements(nodes);
-        }
-        function emitExportDeclaration(node) {
-            emitJsDocComments(node);
-            write("export ");
-            if (node.exportClause) {
-                write("{ ");
-                emitCommaList(node.exportClause.elements, emitExportSpecifier);
-                write(" }");
-            }
-            else {
-                write("*");
-            }
-            if (node.moduleSpecifier) {
-                write(" from ");
-                emitExternalModuleSpecifier(node);
-            }
-            write(";");
-            writer.writeLine();
-        }
-        function writeModuleDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isGlobalScopeAugmentation(node)) {
-                write("global ");
-            }
-            else {
-                if (node.flags & 4096) {
-                    write("namespace ");
-                }
-                else {
-                    write("module ");
-                }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    emitExternalModuleSpecifier(node);
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                }
-            }
-            while (node.body.kind !== 226) {
-                node = node.body;
-                write(".");
-                writeTextOfNode(currentText, node.name);
-            }
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.body.statements);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function writeTypeAliasDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("type ");
-            writeTextOfNode(currentText, node.name);
-            emitTypeParameters(node.typeParameters);
-            write(" = ");
-            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
-            write(";");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-            function getTypeAliasDeclarationVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
-                    errorNode: node.type,
-                    typeName: node.name
-                };
-            }
-        }
-        function writeEnumDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isConst(node)) {
-                write("const ");
-            }
-            write("enum ");
-            writeTextOfNode(currentText, node.name);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-        }
-        function emitEnumMemberDeclaration(node) {
-            emitJsDocComments(node);
-            writeTextOfNode(currentText, node.name);
-            var enumMemberValue = resolver.getConstantValue(node);
-            if (enumMemberValue !== undefined) {
-                write(" = ");
-                write(enumMemberValue.toString());
-            }
-            write(",");
-            writeLine();
-        }
-        function isPrivateMethodTypeParameter(node) {
-            return node.parent.kind === 147 && (node.parent.flags & 8);
-        }
-        function emitTypeParameters(typeParameters) {
-            function emitTypeParameter(node) {
-                increaseIndent();
-                emitJsDocComments(node);
-                decreaseIndent();
-                writeTextOfNode(currentText, node.name);
-                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
-                    write(" extends ");
-                    if (node.parent.kind === 156 ||
-                        node.parent.kind === 157 ||
-                        (node.parent.parent && node.parent.parent.kind === 159)) {
-                        ts.Debug.assert(node.parent.kind === 147 ||
-                            node.parent.kind === 146 ||
-                            node.parent.kind === 156 ||
-                            node.parent.kind === 157 ||
-                            node.parent.kind === 151 ||
-                            node.parent.kind === 152);
-                        emitType(node.constraint);
-                    }
-                    else {
-                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
-                    }
-                }
-                function getTypeParameterConstraintVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage;
-                    switch (node.parent.kind) {
-                        case 221:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
-                            break;
-                        case 222:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 152:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 151:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 147:
-                        case 146:
-                            if (node.parent.flags & 32) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else if (node.parent.parent.kind === 221) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
-                            }
-                            break;
-                        case 220:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                            break;
-                        default:
-                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.name
-                    };
-                }
-            }
-            if (typeParameters) {
-                write("<");
-                emitCommaList(typeParameters, emitTypeParameter);
-                write(">");
-            }
-        }
-        function emitHeritageClause(typeReferences, isImplementsList) {
-            if (typeReferences) {
-                write(isImplementsList ? " implements " : " extends ");
-                emitCommaList(typeReferences, emitTypeOfTypeReference);
-            }
-            function emitTypeOfTypeReference(node) {
-                if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
-                }
-                else if (!isImplementsList && node.expression.kind === 93) {
-                    write("null");
-                }
-                else {
-                    writer.getSymbolAccessibilityDiagnostic = getHeritageClauseVisibilityError;
-                    resolver.writeBaseConstructorTypeOfClass(enclosingDeclaration, enclosingDeclaration, 2, writer);
-                }
-                function getHeritageClauseVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage;
-                    if (node.parent.parent.kind === 221) {
-                        diagnosticMessage = isImplementsList ?
-                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
-                            ts.Diagnostics.Extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        diagnosticMessage = ts.Diagnostics.Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.parent.parent.name
-                    };
-                }
-            }
-        }
-        function writeClassDeclaration(node) {
-            function emitParameterProperties(constructorDeclaration) {
-                if (constructorDeclaration) {
-                    ts.forEach(constructorDeclaration.parameters, function (param) {
-                        if (param.flags & 92) {
-                            emitPropertyDeclaration(param);
-                        }
-                    });
-                }
-            }
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (node.flags & 128) {
-                write("abstract ");
-            }
-            write("class ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                emitHeritageClause([baseTypeNode], false);
-            }
-            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), true);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitParameterProperties(ts.getFirstConstructorWithBody(node));
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function writeInterfaceDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("interface ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            emitHeritageClause(ts.getInterfaceBaseTypeNodes(node), false);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function emitPropertyDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            emitJsDocComments(node);
-            emitClassMemberDeclarationFlags(node.flags);
-            emitVariableDeclaration(node);
-            write(";");
-            writeLine();
-        }
-        function emitVariableDeclaration(node) {
-            if (node.kind !== 218 || resolver.isDeclarationVisible(node)) {
-                if (ts.isBindingPattern(node.name)) {
-                    emitBindingPattern(node.name);
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                    if ((node.kind === 145 || node.kind === 144 || node.kind === 142) && ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                    if ((node.kind === 145 || node.kind === 144) && node.parent.kind === 159) {
-                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
-                    }
-                    else if (!(node.flags & 8)) {
-                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                if (node.kind === 218) {
-                    return symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 ?
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
-                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
-                }
-                else if (node.kind === 145 || node.kind === 144) {
-                    if (node.flags & 32) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else if (node.parent.kind === 221) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
-            }
-            function emitBindingPattern(bindingPattern) {
-                var elements = [];
-                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (element.kind !== 193) {
-                        elements.push(element);
-                    }
-                }
-                emitCommaList(elements, emitBindingElement);
-            }
-            function emitBindingElement(bindingElement) {
-                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                    return diagnosticMessage !== undefined ? {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: bindingElement,
-                        typeName: bindingElement.name
-                    } : undefined;
-                }
-                if (bindingElement.name) {
-                    if (ts.isBindingPattern(bindingElement.name)) {
-                        emitBindingPattern(bindingElement.name);
-                    }
-                    else {
-                        writeTextOfNode(currentText, bindingElement.name);
-                        writeTypeOfDeclaration(bindingElement, undefined, getBindingElementTypeVisibilityError);
-                    }
-                }
-            }
-        }
-        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
-            if (node.type) {
-                write(": ");
-                emitType(node.type);
-            }
-        }
-        function isVariableStatementVisible(node) {
-            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
-        }
-        function writeVariableStatement(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isLet(node.declarationList)) {
-                write("let ");
-            }
-            else if (ts.isConst(node.declarationList)) {
-                write("const ");
-            }
-            else {
-                write("var ");
-            }
-            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
-            write(";");
-            writeLine();
-        }
-        function emitAccessorDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-            var accessorWithTypeAnnotation;
-            if (node === accessors.firstAccessor) {
-                emitJsDocComments(accessors.getAccessor);
-                emitJsDocComments(accessors.setAccessor);
-                emitClassMemberDeclarationFlags(node.flags | (accessors.setAccessor ? 0 : 64));
-                writeTextOfNode(currentText, node.name);
-                if (!(node.flags & 8)) {
-                    accessorWithTypeAnnotation = node;
-                    var type = getTypeAnnotationFromAccessor(node);
-                    if (!type) {
-                        var anotherAccessor = node.kind === 149 ? accessors.setAccessor : accessors.getAccessor;
-                        type = getTypeAnnotationFromAccessor(anotherAccessor);
-                        if (type) {
-                            accessorWithTypeAnnotation = anotherAccessor;
-                        }
-                    }
-                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
-                }
-                write(";");
-                writeLine();
-            }
-            function getTypeAnnotationFromAccessor(accessor) {
-                if (accessor) {
-                    return accessor.kind === 149
-                        ? accessor.type
-                        : accessor.parameters.length > 0
-                            ? accessor.parameters[0].type
-                            : undefined;
-                }
-            }
-            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                if (accessorWithTypeAnnotation.kind === 150) {
-                    if (accessorWithTypeAnnotation.parent.flags & 32) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.parameters[0],
-                        typeName: accessorWithTypeAnnotation.name
-                    };
-                }
-                else {
-                    if (accessorWithTypeAnnotation.flags & 32) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
-                    }
-                    else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.name,
-                        typeName: undefined
-                    };
-                }
-            }
-        }
-        function writeFunctionDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            if (!resolver.isImplementationOfOverload(node)) {
-                emitJsDocComments(node);
-                if (node.kind === 220) {
-                    emitModuleElementDeclarationFlags(node);
-                }
-                else if (node.kind === 147 || node.kind === 148) {
-                    emitClassMemberDeclarationFlags(node.flags);
-                }
-                if (node.kind === 220) {
-                    write("function ");
-                    writeTextOfNode(currentText, node.name);
-                }
-                else if (node.kind === 148) {
-                    write("constructor");
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                    if (ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                }
-                emitSignatureDeclaration(node);
-            }
-        }
-        function emitSignatureDeclarationWithJsDocComments(node) {
-            emitJsDocComments(node);
-            emitSignatureDeclaration(node);
-        }
-        function emitSignatureDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            var closeParenthesizedFunctionType = false;
-            if (node.kind === 153) {
-                emitClassMemberDeclarationFlags(node.flags);
-                write("[");
-            }
-            else {
-                if (node.kind === 152 || node.kind === 157) {
-                    write("new ");
-                }
-                else if (node.kind === 156) {
-                    var currentOutput = writer.getText();
-                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
-                        closeParenthesizedFunctionType = true;
-                        write("(");
-                    }
-                }
-                emitTypeParameters(node.typeParameters);
-                write("(");
-            }
-            emitCommaList(node.parameters, emitParameterDeclaration);
-            if (node.kind === 153) {
-                write("]");
-            }
-            else {
-                write(")");
-            }
-            var isFunctionTypeOrConstructorType = node.kind === 156 || node.kind === 157;
-            if (isFunctionTypeOrConstructorType || node.parent.kind === 159) {
-                if (node.type) {
-                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
-                    emitType(node.type);
-                }
-            }
-            else if (node.kind !== 148 && !(node.flags & 8)) {
-                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
-            }
-            enclosingDeclaration = prevEnclosingDeclaration;
-            if (!isFunctionTypeOrConstructorType) {
-                write(";");
-                writeLine();
-            }
-            else if (closeParenthesizedFunctionType) {
-                write(")");
-            }
-            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                switch (node.kind) {
-                    case 152:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 151:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 153:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 147:
-                    case 146:
-                        if (node.flags & 32) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 ?
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
-                        }
-                        else if (node.parent.kind === 221) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 ?
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
-                        }
-                        else {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
-                        }
-                        break;
-                    case 220:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
-                        break;
-                    default:
-                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
-                }
-                return {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node.name || node
-                };
-            }
-        }
-        function emitParameterDeclaration(node) {
-            increaseIndent();
-            emitJsDocComments(node);
-            if (node.dotDotDotToken) {
-                write("...");
-            }
-            if (ts.isBindingPattern(node.name)) {
-                emitBindingPattern(node.name);
-            }
-            else {
-                writeTextOfNode(currentText, node.name);
-            }
-            if (resolver.isOptionalParameter(node)) {
-                write("?");
-            }
-            decreaseIndent();
-            if (node.parent.kind === 156 ||
-                node.parent.kind === 157 ||
-                node.parent.parent.kind === 159) {
-                emitTypeOfVariableDeclarationFromTypeLiteral(node);
-            }
-            else if (!(node.parent.flags & 8)) {
-                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
-            }
-            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
-            }
-            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                switch (node.parent.kind) {
-                    case 148:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
-                    case 152:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 151:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 147:
-                    case 146:
-                        if (node.parent.flags & 32) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 ?
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else if (node.parent.parent.kind === 221) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 ?
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
-                        }
-                    case 220:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 ?
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                    default:
-                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
-                }
-            }
-            function emitBindingPattern(bindingPattern) {
-                if (bindingPattern.kind === 167) {
-                    write("{");
-                    emitCommaList(bindingPattern.elements, emitBindingElement);
-                    write("}");
-                }
-                else if (bindingPattern.kind === 168) {
-                    write("[");
-                    var elements = bindingPattern.elements;
-                    emitCommaList(elements, emitBindingElement);
-                    if (elements && elements.hasTrailingComma) {
-                        write(", ");
-                    }
-                    write("]");
-                }
-            }
-            function emitBindingElement(bindingElement) {
-                if (bindingElement.kind === 193) {
-                    write(" ");
-                }
-                else if (bindingElement.kind === 169) {
-                    if (bindingElement.propertyName) {
-                        writeTextOfNode(currentText, bindingElement.propertyName);
-                        write(": ");
-                    }
-                    if (bindingElement.name) {
-                        if (ts.isBindingPattern(bindingElement.name)) {
-                            emitBindingPattern(bindingElement.name);
-                        }
-                        else {
-                            ts.Debug.assert(bindingElement.name.kind === 69);
-                            if (bindingElement.dotDotDotToken) {
-                                write("...");
-                            }
-                            writeTextOfNode(currentText, bindingElement.name);
-                        }
-                    }
-                }
-            }
-        }
-        function emitNode(node) {
-            switch (node.kind) {
-                case 220:
-                case 225:
-                case 229:
-                case 222:
-                case 221:
-                case 223:
-                case 224:
-                    return emitModuleElement(node, isModuleElementVisible(node));
-                case 200:
-                    return emitModuleElement(node, isVariableStatementVisible(node));
-                case 230:
-                    return emitModuleElement(node, !node.importClause);
-                case 236:
-                    return emitExportDeclaration(node);
-                case 148:
-                case 147:
-                case 146:
-                    return writeFunctionDeclaration(node);
-                case 152:
-                case 151:
-                case 153:
-                    return emitSignatureDeclarationWithJsDocComments(node);
-                case 149:
-                case 150:
-                    return emitAccessorDeclaration(node);
-                case 145:
-                case 144:
-                    return emitPropertyDeclaration(node);
-                case 255:
-                    return emitEnumMemberDeclaration(node);
-                case 235:
-                    return emitExportAssignment(node);
-                case 256:
-                    return emitSourceFile(node);
-            }
-        }
-        function writeReferencePath(referencedFile, addBundledFileReference) {
-            var declFileName;
-            var addedBundledEmitReference = false;
-            if (ts.isDeclarationFile(referencedFile)) {
-                declFileName = referencedFile.fileName;
-            }
-            else {
-                ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile);
-            }
-            if (declFileName) {
-                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, false);
-                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
-            }
-            return addedBundledEmitReference;
-            function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) {
-                if (isBundledEmit && !addBundledFileReference) {
-                    return;
-                }
-                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
-                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
-                addedBundledEmitReference = isBundledEmit;
-            }
-        }
-    }
-    function writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) {
-        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit);
-        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
-        if (!emitSkipped) {
-            var declarationOutput = emitDeclarationResult.referencesOutput
-                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
-            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
-        }
-        return emitSkipped;
-        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
-            var appliedSyncOutputPos = 0;
-            var declarationOutput = "";
-            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                if (aliasEmitInfo.asynchronousOutput) {
-                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
-                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
-                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
-                }
-            });
-            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
-            return declarationOutput;
-        }
-    }
-    ts.writeDeclarationFile = writeDeclarationFile;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getResolvedExternalModuleName(host, file) {
-        return file.moduleName || ts.getExternalModuleNameFromPath(host, file.fileName);
-    }
-    ts.getResolvedExternalModuleName = getResolvedExternalModuleName;
-    function getExternalModuleNameFromDeclaration(host, resolver, declaration) {
-        var file = resolver.getExternalModuleFileFromDeclaration(declaration);
-        if (!file || ts.isDeclarationFile(file)) {
-            return undefined;
-        }
-        return getResolvedExternalModuleName(host, file);
-    }
-    ts.getExternalModuleNameFromDeclaration = getExternalModuleNameFromDeclaration;
-    var entities = {
-        "quot": 0x0022,
-        "amp": 0x0026,
-        "apos": 0x0027,
-        "lt": 0x003C,
-        "gt": 0x003E,
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-        "iexcl": 0x00A1,
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-        "sect": 0x00A7,
-        "uml": 0x00A8,
-        "copy": 0x00A9,
-        "ordf": 0x00AA,
-        "laquo": 0x00AB,
-        "not": 0x00AC,
-        "shy": 0x00AD,
-        "reg": 0x00AE,
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-        "plusmn": 0x00B1,
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-        "sup3": 0x00B3,
-        "acute": 0x00B4,
-        "micro": 0x00B5,
-        "para": 0x00B6,
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-        "aring": 0x00E5,
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-        "ccedil": 0x00E7,
-        "egrave": 0x00E8,
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-        "alpha": 0x03B1,
-        "beta": 0x03B2,
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-        "mu": 0x03BC,
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-        "omicron": 0x03BF,
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-        "sigma": 0x03C3,
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-        "upsilon": 0x03C5,
-        "phi": 0x03C6,
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-        "psi": 0x03C8,
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-        "lsquo": 0x2018,
-        "rsquo": 0x2019,
-        "sbquo": 0x201A,
-        "ldquo": 0x201C,
-        "rdquo": 0x201D,
-        "bdquo": 0x201E,
-        "dagger": 0x2020,
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-        "hellip": 0x2026,
-        "permil": 0x2030,
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-        "Prime": 0x2033,
-        "lsaquo": 0x2039,
-        "rsaquo": 0x203A,
-        "oline": 0x203E,
-        "frasl": 0x2044,
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-        "image": 0x2111,
-        "weierp": 0x2118,
-        "real": 0x211C,
-        "trade": 0x2122,
-        "alefsym": 0x2135,
-        "larr": 0x2190,
-        "uarr": 0x2191,
-        "rarr": 0x2192,
-        "darr": 0x2193,
-        "harr": 0x2194,
-        "crarr": 0x21B5,
-        "lArr": 0x21D0,
-        "uArr": 0x21D1,
-        "rArr": 0x21D2,
-        "dArr": 0x21D3,
-        "hArr": 0x21D4,
-        "forall": 0x2200,
-        "part": 0x2202,
-        "exist": 0x2203,
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-        "ni": 0x220B,
-        "prod": 0x220F,
-        "sum": 0x2211,
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-        "lowast": 0x2217,
-        "radic": 0x221A,
-        "prop": 0x221D,
-        "infin": 0x221E,
-        "ang": 0x2220,
-        "and": 0x2227,
-        "or": 0x2228,
-        "cap": 0x2229,
-        "cup": 0x222A,
-        "int": 0x222B,
-        "there4": 0x2234,
-        "sim": 0x223C,
-        "cong": 0x2245,
-        "asymp": 0x2248,
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-        "equiv": 0x2261,
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-        "sub": 0x2282,
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-        "nsub": 0x2284,
-        "sube": 0x2286,
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-        "oplus": 0x2295,
-        "otimes": 0x2297,
-        "perp": 0x22A5,
-        "sdot": 0x22C5,
-        "lceil": 0x2308,
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-        "lfloor": 0x230A,
-        "rfloor": 0x230B,
-        "lang": 0x2329,
-        "rang": 0x232A,
-        "loz": 0x25CA,
-        "spades": 0x2660,
-        "clubs": 0x2663,
-        "hearts": 0x2665,
-        "diams": 0x2666
-    };
-    function emitFiles(resolver, host, targetSourceFile) {
-        var extendsHelper = "\nvar __extends = (this && this.__extends) || function (d, b) {\n    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n    function __() { this.constructor = d; }\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n};";
-        var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n    for (var s, i = 1, n = arguments.length; i < n; i++) {\n        s = arguments[i];\n        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n            t[p] = s[p];\n    }\n    return t;\n};";
-        var decorateHelper = "\nvar __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\n};";
-        var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};";
-        var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n    return function (target, key) { decorator(target, key, paramIndex); }\n};";
-        var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n    return new (P || (P = Promise))(function (resolve, reject) {\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n        step((generator = generator.apply(thisArg, _arguments)).next());\n    });\n};";
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-        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
-        var modulekind = ts.getEmitModuleKind(compilerOptions);
-        var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
-        var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined;
-        var emitterDiagnostics = ts.createDiagnosticCollection();
-        var emitSkipped = false;
-        var newLine = host.getNewLine();
-        var emitJavaScript = createFileEmitter();
-        ts.forEachExpectedEmitFile(host, emitFile, targetSourceFile);
-        return {
-            emitSkipped: emitSkipped,
-            diagnostics: emitterDiagnostics.getDiagnostics(),
-            emittedFiles: emittedFilesList,
-            sourceMaps: sourceMapDataList
-        };
-        function isUniqueLocalName(name, container) {
-            for (var node = container; ts.isNodeDescendentOf(node, container); node = node.nextContainer) {
-                if (node.locals && ts.hasProperty(node.locals, name)) {
-                    if (node.locals[name].flags & (107455 | 1048576 | 8388608)) {
-                        return false;
-                    }
-                }
-            }
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-                    state.labeledNonLocalBreaks = {};
-                }
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-                    state.labeledNonLocalContinues = {};
-                }
-                state.labeledNonLocalContinues[labelText] = labelMarker;
-            }
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-        function hoistVariableDeclarationFromLoop(state, declaration) {
-            if (!state.hoistedLocalVariables) {
-                state.hoistedLocalVariables = [];
-            }
-            visit(declaration.name);
-            function visit(node) {
-                if (node.kind === 69) {
-                    state.hoistedLocalVariables.push(node);
-                }
-                else {
-                    for (var _a = 0, _b = node.elements; _a < _b.length; _a++) {
-                        var element = _b[_a];
-                        visit(element.name);
-                    }
-                }
-            }
-        }
-        function createFileEmitter() {
-            var writer = ts.createTextWriter(newLine);
-            var write = writer.write, writeTextOfNode = writer.writeTextOfNode, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent;
-            var sourceMap = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? ts.createSourceMapWriter(host, writer) : ts.getNullSourceMapWriter();
-            var setSourceFile = sourceMap.setSourceFile, emitStart = sourceMap.emitStart, emitEnd = sourceMap.emitEnd, emitPos = sourceMap.emitPos;
-            var currentSourceFile;
-            var currentText;
-            var currentLineMap;
-            var currentFileIdentifiers;
-            var renamedDependencies;
-            var isEs6Module;
-            var isCurrentFileExternalModule;
-            var exportFunctionForFile;
-            var contextObjectForFile;
-            var generatedNameSet;
-            var nodeToGeneratedName;
-            var computedPropertyNamesToGeneratedNames;
-            var decoratedClassAliases;
-            var convertedLoopState;
-            var extendsEmitted;
-            var assignEmitted;
-            var decorateEmitted;
-            var paramEmitted;
-            var awaiterEmitted;
-            var tempFlags = 0;
-            var tempVariables;
-            var tempParameters;
-            var externalImports;
-            var exportSpecifiers;
-            var exportEquals;
-            var hasExportStarsToExportValues;
-            var detachedCommentsInfo;
-            var sourceMapData;
-            var isOwnFileEmit;
-            var emitLeadingCommentsOfPosition = compilerOptions.removeComments ? function (pos) { } : emitLeadingCommentsOfPositionWorker;
-            var setSourceMapWriterEmit = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? changeSourceMapEmit : function (writer) { };
-            var moduleEmitDelegates = (_a = {},
-                _a[ts.ModuleKind.ES6] = emitES6Module,
-                _a[ts.ModuleKind.AMD] = emitAMDModule,
-                _a[ts.ModuleKind.System] = emitSystemModule,
-                _a[ts.ModuleKind.UMD] = emitUMDModule,
-                _a[ts.ModuleKind.CommonJS] = emitCommonJSModule,
-                _a
-            );
-            var bundleEmitDelegates = (_b = {},
-                _b[ts.ModuleKind.ES6] = function () { },
-                _b[ts.ModuleKind.AMD] = emitAMDModule,
-                _b[ts.ModuleKind.System] = emitSystemModule,
-                _b[ts.ModuleKind.UMD] = function () { },
-                _b[ts.ModuleKind.CommonJS] = function () { },
-                _b
-            );
-            return doEmit;
-            function doEmit(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
-                sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
-                generatedNameSet = {};
-                nodeToGeneratedName = [];
-                decoratedClassAliases = [];
-                isOwnFileEmit = !isBundledEmit;
-                if (isBundledEmit && modulekind) {
-                    ts.forEach(sourceFiles, emitEmitHelpers);
-                }
-                ts.forEach(sourceFiles, emitSourceFile);
-                writeLine();
-                var sourceMappingURL = sourceMap.getSourceMappingURL();
-                if (sourceMappingURL) {
-                    write("//# sourceMappingURL=" + sourceMappingURL);
-                }
-                writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, compilerOptions.emitBOM, sourceFiles);
-                sourceMap.reset();
-                writer.reset();
-                currentSourceFile = undefined;
-                currentText = undefined;
-                currentLineMap = undefined;
-                exportFunctionForFile = undefined;
-                contextObjectForFile = undefined;
-                generatedNameSet = undefined;
-                nodeToGeneratedName = undefined;
-                decoratedClassAliases = undefined;
-                computedPropertyNamesToGeneratedNames = undefined;
-                convertedLoopState = undefined;
-                extendsEmitted = false;
-                decorateEmitted = false;
-                paramEmitted = false;
-                awaiterEmitted = false;
-                assignEmitted = false;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = undefined;
-                detachedCommentsInfo = undefined;
-                sourceMapData = undefined;
-                isEs6Module = false;
-                renamedDependencies = undefined;
-                isCurrentFileExternalModule = false;
-            }
-            function emitSourceFile(sourceFile) {
-                currentSourceFile = sourceFile;
-                currentText = sourceFile.text;
-                currentLineMap = ts.getLineStarts(sourceFile);
-                exportFunctionForFile = undefined;
-                contextObjectForFile = undefined;
-                isEs6Module = sourceFile.symbol && sourceFile.symbol.exports && !!sourceFile.symbol.exports["___esModule"];
-                renamedDependencies = sourceFile.renamedDependencies;
-                currentFileIdentifiers = sourceFile.identifiers;
-                isCurrentFileExternalModule = ts.isExternalModule(sourceFile);
-                setSourceFile(sourceFile);
-                emitNodeWithCommentsAndWithoutSourcemap(sourceFile);
-            }
-            function isUniqueName(name) {
-                return !resolver.hasGlobalName(name) &&
-                    !ts.hasProperty(currentFileIdentifiers, name) &&
-                    !ts.hasProperty(generatedNameSet, name);
-            }
-            function makeTempVariableName(flags) {
-                if (flags && !(tempFlags & flags)) {
-                    var name_23 = flags === 268435456 ? "_i" : "_n";
-                    if (isUniqueName(name_23)) {
-                        tempFlags |= flags;
-                        return name_23;
-                    }
-                }
-                while (true) {
-                    var count = tempFlags & 268435455;
-                    tempFlags++;
-                    if (count !== 8 && count !== 13) {
-                        var name_24 = count < 26 ? "_" + String.fromCharCode(97 + count) : "_" + (count - 26);
-                        if (isUniqueName(name_24)) {
-                            return name_24;
-                        }
-                    }
-                }
-            }
-            function makeUniqueName(baseName) {
-                if (baseName.charCodeAt(baseName.length - 1) !== 95) {
-                    baseName += "_";
-                }
-                var i = 1;
-                while (true) {
-                    var generatedName = baseName + i;
-                    if (isUniqueName(generatedName)) {
-                        return generatedNameSet[generatedName] = generatedName;
-                    }
-                    i++;
-                }
-            }
-            function generateNameForModuleOrEnum(node) {
-                var name = node.name.text;
-                return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
-            }
-            function generateNameForImportOrExportDeclaration(node) {
-                var expr = ts.getExternalModuleName(node);
-                var baseName = expr.kind === 9 ?
-                    ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module";
-                return makeUniqueName(baseName);
-            }
-            function generateNameForExportDefault() {
-                return makeUniqueName("default");
-            }
-            function generateNameForClassExpression() {
-                return makeUniqueName("class");
-            }
-            function generateNameForNode(node) {
-                switch (node.kind) {
-                    case 69:
-                        return makeUniqueName(node.text);
-                    case 225:
-                    case 224:
-                        return generateNameForModuleOrEnum(node);
-                    case 230:
-                    case 236:
-                        return generateNameForImportOrExportDeclaration(node);
-                    case 220:
-                    case 221:
-                    case 235:
-                        return generateNameForExportDefault();
-                    case 192:
-                        return generateNameForClassExpression();
-                }
-            }
-            function getGeneratedNameForNode(node) {
-                var id = ts.getNodeId(node);
-                return nodeToGeneratedName[id] || (nodeToGeneratedName[id] = ts.unescapeIdentifier(generateNameForNode(node)));
-            }
-            function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) {
-                if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
-                    ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), false, sourceFiles);
-                }
-                if (sourceMapDataList) {
-                    sourceMapDataList.push(sourceMap.getSourceMapData());
-                }
-                ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles);
-            }
-            function createTempVariable(flags) {
-                var result = ts.createSynthesizedNode(69);
-                result.text = makeTempVariableName(flags);
-                return result;
-            }
-            function recordTempDeclaration(name) {
-                if (!tempVariables) {
-                    tempVariables = [];
-                }
-                tempVariables.push(name);
-            }
-            function createAndRecordTempVariable(flags) {
-                var temp = createTempVariable(flags);
-                recordTempDeclaration(temp);
-                return temp;
-            }
-            function emitTempDeclarations(newLine) {
-                if (tempVariables) {
-                    if (newLine) {
-                        writeLine();
-                    }
-                    else {
-                        write(" ");
-                    }
-                    write("var ");
-                    emitCommaList(tempVariables);
-                    write(";");
-                }
-            }
-            function emitToken(tokenKind, startPos, emitFn) {
-                var tokenStartPos = ts.skipTrivia(currentText, startPos);
-                emitPos(tokenStartPos);
-                var tokenString = ts.tokenToString(tokenKind);
-                if (emitFn) {
-                    emitFn();
-                }
-                else {
-                    write(tokenString);
-                }
-                var tokenEndPos = tokenStartPos + tokenString.length;
-                emitPos(tokenEndPos);
-                return tokenEndPos;
-            }
-            function emitOptional(prefix, node) {
-                if (node) {
-                    write(prefix);
-                    emit(node);
-                }
-            }
-            function emitParenthesizedIf(node, parenthesized) {
-                if (parenthesized) {
-                    write("(");
-                }
-                emit(node);
-                if (parenthesized) {
-                    write(")");
-                }
-            }
-            function emitLinePreservingList(parent, nodes, allowTrailingComma, spacesBetweenBraces) {
-                ts.Debug.assert(nodes.length > 0);
-                increaseIndent();
-                if (nodeStartPositionsAreOnSameLine(parent, nodes[0])) {
-                    if (spacesBetweenBraces) {
-                        write(" ");
-                    }
-                }
-                else {
-                    writeLine();
-                }
-                for (var i = 0, n = nodes.length; i < n; i++) {
-                    if (i) {
-                        if (nodeEndIsOnSameLineAsNodeStart(nodes[i - 1], nodes[i])) {
-                            write(", ");
-                        }
-                        else {
-                            write(",");
-                            writeLine();
-                        }
-                    }
-                    emit(nodes[i]);
-                }
-                if (nodes.hasTrailingComma && allowTrailingComma) {
-                    write(",");
-                }
-                decreaseIndent();
-                if (nodeEndPositionsAreOnSameLine(parent, ts.lastOrUndefined(nodes))) {
-                    if (spacesBetweenBraces) {
-                        write(" ");
-                    }
-                }
-                else {
-                    writeLine();
-                }
-            }
-            function emitList(nodes, start, count, multiLine, trailingComma, leadingComma, noTrailingNewLine, emitNode) {
-                if (!emitNode) {
-                    emitNode = emit;
-                }
-                for (var i = 0; i < count; i++) {
-                    if (multiLine) {
-                        if (i || leadingComma) {
-                            write(",");
-                        }
-                        writeLine();
-                    }
-                    else {
-                        if (i || leadingComma) {
-                            write(", ");
-                        }
-                    }
-                    var node = nodes[start + i];
-                    emitTrailingCommentsOfPosition(node.pos);
-                    emitNode(node);
-                    leadingComma = true;
-                }
-                if (trailingComma) {
-                    write(",");
-                }
-                if (multiLine && !noTrailingNewLine) {
-                    writeLine();
-                }
-                return count;
-            }
-            function emitCommaList(nodes) {
-                if (nodes) {
-                    emitList(nodes, 0, nodes.length, false, false);
-                }
-            }
-            function emitLines(nodes) {
-                emitLinesStartingAt(nodes, 0);
-            }
-            function emitLinesStartingAt(nodes, startIndex) {
-                for (var i = startIndex; i < nodes.length; i++) {
-                    writeLine();
-                    emit(nodes[i]);
-                }
-            }
-            function isBinaryOrOctalIntegerLiteral(node, text) {
-                if (node.kind === 8 && text.length > 1) {
-                    switch (text.charCodeAt(1)) {
-                        case 98:
-                        case 66:
-                        case 111:
-                        case 79:
-                            return true;
-                    }
-                }
-                return false;
-            }
-            function emitLiteral(node) {
-                var text = getLiteralText(node);
-                if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap) && (node.kind === 9 || ts.isTemplateLiteralKind(node.kind))) {
-                    writer.writeLiteral(text);
-                }
-                else if (languageVersion < 2 && isBinaryOrOctalIntegerLiteral(node, text)) {
-                    write(node.text);
-                }
-                else {
-                    write(text);
-                }
-            }
-            function getLiteralText(node) {
-                if (languageVersion < 2 && (ts.isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) {
-                    return getQuotedEscapedLiteralText('"', node.text, '"');
-                }
-                if (node.parent) {
-                    return ts.getTextOfNodeFromSourceText(currentText, node);
-                }
-                switch (node.kind) {
-                    case 9:
-                        return getQuotedEscapedLiteralText('"', node.text, '"');
-                    case 11:
-                        return getQuotedEscapedLiteralText("`", node.text, "`");
-                    case 12:
-                        return getQuotedEscapedLiteralText("`", node.text, "${");
-                    case 13:
-                        return getQuotedEscapedLiteralText("}", node.text, "${");
-                    case 14:
-                        return getQuotedEscapedLiteralText("}", node.text, "`");
-                    case 8:
-                        return node.text;
-                }
-                ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
-            }
-            function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) {
-                return leftQuote + ts.escapeNonAsciiCharacters(ts.escapeString(text)) + rightQuote;
-            }
-            function emitDownlevelRawTemplateLiteral(node) {
-                var text = ts.getTextOfNodeFromSourceText(currentText, node);
-                var isLast = node.kind === 11 || node.kind === 14;
-                text = text.substring(1, text.length - (isLast ? 1 : 2));
-                text = text.replace(/\r\n?/g, "\n");
-                text = ts.escapeString(text);
-                write("\"" + text + "\"");
-            }
-            function emitDownlevelTaggedTemplateArray(node, literalEmitter) {
-                write("[");
-                if (node.template.kind === 11) {
-                    literalEmitter(node.template);
-                }
-                else {
-                    literalEmitter(node.template.head);
-                    ts.forEach(node.template.templateSpans, function (child) {
-                        write(", ");
-                        literalEmitter(child.literal);
-                    });
-                }
-                write("]");
-            }
-            function emitDownlevelTaggedTemplate(node) {
-                var tempVariable = createAndRecordTempVariable(0);
-                write("(");
-                emit(tempVariable);
-                write(" = ");
-                emitDownlevelTaggedTemplateArray(node, emit);
-                write(", ");
-                emit(tempVariable);
-                write(".raw = ");
-                emitDownlevelTaggedTemplateArray(node, emitDownlevelRawTemplateLiteral);
-                write(", ");
-                emitParenthesizedIf(node.tag, needsParenthesisForPropertyAccessOrInvocation(node.tag));
-                write("(");
-                emit(tempVariable);
-                if (node.template.kind === 189) {
-                    ts.forEach(node.template.templateSpans, function (templateSpan) {
-                        write(", ");
-                        var needsParens = templateSpan.expression.kind === 187
-                            && templateSpan.expression.operatorToken.kind === 24;
-                        emitParenthesizedIf(templateSpan.expression, needsParens);
-                    });
-                }
-                write("))");
-            }
-            function emitTemplateExpression(node) {
-                if (languageVersion >= 2) {
-                    ts.forEachChild(node, emit);
-                    return;
-                }
-                var emitOuterParens = ts.isExpression(node.parent)
-                    && templateNeedsParens(node, node.parent);
-                if (emitOuterParens) {
-                    write("(");
-                }
-                var headEmitted = false;
-                if (shouldEmitTemplateHead()) {
-                    emitLiteral(node.head);
-                    headEmitted = true;
-                }
-                for (var i = 0, n = node.templateSpans.length; i < n; i++) {
-                    var templateSpan = node.templateSpans[i];
-                    var needsParens = templateSpan.expression.kind !== 178
-                        && comparePrecedenceToBinaryPlus(templateSpan.expression) !== 1;
-                    if (i > 0 || headEmitted) {
-                        write(" + ");
-                    }
-                    emitParenthesizedIf(templateSpan.expression, needsParens);
-                    if (templateSpan.literal.text.length !== 0) {
-                        write(" + ");
-                        emitLiteral(templateSpan.literal);
-                    }
-                }
-                if (emitOuterParens) {
-                    write(")");
-                }
-                function shouldEmitTemplateHead() {
-                    ts.Debug.assert(node.templateSpans.length !== 0);
-                    return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0;
-                }
-                function templateNeedsParens(template, parent) {
-                    switch (parent.kind) {
-                        case 174:
-                        case 175:
-                            return parent.expression === template;
-                        case 176:
-                        case 178:
-                            return false;
-                        default:
-                            return comparePrecedenceToBinaryPlus(parent) !== -1;
-                    }
-                }
-                function comparePrecedenceToBinaryPlus(expression) {
-                    switch (expression.kind) {
-                        case 187:
-                            switch (expression.operatorToken.kind) {
-                                case 37:
-                                case 39:
-                                case 40:
-                                    return 1;
-                                case 35:
-                                case 36:
-                                    return 0;
-                                default:
-                                    return -1;
-                            }
-                        case 190:
-                        case 188:
-                            return -1;
-                        default:
-                            return 1;
-                    }
-                }
-            }
-            function emitTemplateSpan(span) {
-                emit(span.expression);
-                emit(span.literal);
-            }
-            function jsxEmitReact(node) {
-                function emitTagName(name) {
-                    if (name.kind === 69 && ts.isIntrinsicJsxName(name.text)) {
-                        write('"');
-                        emit(name);
-                        write('"');
-                    }
-                    else {
-                        emit(name);
-                    }
-                }
-                function emitAttributeName(name) {
-                    if (/^[A-Za-z_]\w*$/.test(name.text)) {
-                        emit(name);
-                    }
-                    else {
-                        write('"');
-                        emit(name);
-                        write('"');
-                    }
-                }
-                function emitJsxAttribute(node) {
-                    emitAttributeName(node.name);
-                    write(": ");
-                    if (node.initializer) {
-                        emit(node.initializer);
-                    }
-                    else {
-                        write("true");
-                    }
-                }
-                function emitJsxElement(openingNode, children) {
-                    var syntheticReactRef = ts.createSynthesizedNode(69);
-                    syntheticReactRef.text = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
-                    syntheticReactRef.parent = openingNode;
-                    emitLeadingComments(openingNode);
-                    emitExpressionIdentifier(syntheticReactRef);
-                    write(".createElement(");
-                    emitTagName(openingNode.tagName);
-                    write(", ");
-                    if (openingNode.attributes.length === 0) {
-                        write("null");
-                    }
-                    else {
-                        var attrs = openingNode.attributes;
-                        if (ts.forEach(attrs, function (attr) { return attr.kind === 247; })) {
-                            write("__assign(");
-                            var haveOpenedObjectLiteral = false;
-                            for (var i = 0; i < attrs.length; i++) {
-                                if (attrs[i].kind === 247) {
-                                    if (i === 0) {
-                                        write("{}, ");
-                                    }
-                                    if (haveOpenedObjectLiteral) {
-                                        write("}");
-                                        haveOpenedObjectLiteral = false;
-                                    }
-                                    if (i > 0) {
-                                        write(", ");
-                                    }
-                                    emit(attrs[i].expression);
-                                }
-                                else {
-                                    ts.Debug.assert(attrs[i].kind === 246);
-                                    if (haveOpenedObjectLiteral) {
-                                        write(", ");
-                                    }
-                                    else {
-                                        haveOpenedObjectLiteral = true;
-                                        if (i > 0) {
-                                            write(", ");
-                                        }
-                                        write("{");
-                                    }
-                                    emitJsxAttribute(attrs[i]);
-                                }
-                            }
-                            if (haveOpenedObjectLiteral)
-                                write("}");
-                            write(")");
-                        }
-                        else {
-                            write("{");
-                            for (var i = 0, n = attrs.length; i < n; i++) {
-                                if (i > 0) {
-                                    write(", ");
-                                }
-                                emitJsxAttribute(attrs[i]);
-                            }
-                            write("}");
-                        }
-                    }
-                    if (children) {
-                        var firstChild = void 0;
-                        var multipleEmittableChildren = false;
-                        for (var i = 0, n = children.length; i < n; i++) {
-                            var jsxChild = children[i];
-                            if (isJsxChildEmittable(jsxChild)) {
-                                if (!firstChild) {
-                                    write(", ");
-                                    firstChild = jsxChild;
-                                }
-                                else {
-                                    if (!multipleEmittableChildren) {
-                                        multipleEmittableChildren = true;
-                                        increaseIndent();
-                                        writeLine();
-                                        emit(firstChild);
-                                    }
-                                    write(", ");
-                                    writeLine();
-                                    emit(jsxChild);
-                                }
-                            }
-                        }
-                        if (multipleEmittableChildren) {
-                            decreaseIndent();
-                        }
-                        else if (firstChild) {
-                            if (firstChild.kind !== 241 && firstChild.kind !== 242) {
-                                emit(firstChild);
-                            }
-                            else {
-                                increaseIndent();
-                                writeLine();
-                                emit(firstChild);
-                                writeLine();
-                                decreaseIndent();
-                            }
-                        }
-                    }
-                    write(")");
-                    emitTrailingComments(openingNode);
-                }
-                if (node.kind === 241) {
-                    emitJsxElement(node.openingElement, node.children);
-                }
-                else {
-                    ts.Debug.assert(node.kind === 242);
-                    emitJsxElement(node);
-                }
-            }
-            function jsxEmitPreserve(node) {
-                function emitJsxAttribute(node) {
-                    emit(node.name);
-                    if (node.initializer) {
-                        write("=");
-                        emit(node.initializer);
-                    }
-                }
-                function emitJsxSpreadAttribute(node) {
-                    write("{...");
-                    emit(node.expression);
-                    write("}");
-                }
-                function emitAttributes(attribs) {
-                    for (var i = 0, n = attribs.length; i < n; i++) {
-                        if (i > 0) {
-                            write(" ");
-                        }
-                        if (attribs[i].kind === 247) {
-                            emitJsxSpreadAttribute(attribs[i]);
-                        }
-                        else {
-                            ts.Debug.assert(attribs[i].kind === 246);
-                            emitJsxAttribute(attribs[i]);
-                        }
-                    }
-                }
-                function emitJsxOpeningOrSelfClosingElement(node) {
-                    write("<");
-                    emit(node.tagName);
-                    if (node.attributes.length > 0 || (node.kind === 242)) {
-                        write(" ");
-                    }
-                    emitAttributes(node.attributes);
-                    if (node.kind === 242) {
-                        write("/>");
-                    }
-                    else {
-                        write(">");
-                    }
-                }
-                function emitJsxClosingElement(node) {
-                    write("</");
-                    emit(node.tagName);
-                    write(">");
-                }
-                function emitJsxElement(node) {
-                    emitJsxOpeningOrSelfClosingElement(node.openingElement);
-                    for (var i = 0, n = node.children.length; i < n; i++) {
-                        emit(node.children[i]);
-                    }
-                    emitJsxClosingElement(node.closingElement);
-                }
-                if (node.kind === 241) {
-                    emitJsxElement(node);
-                }
-                else {
-                    ts.Debug.assert(node.kind === 242);
-                    emitJsxOpeningOrSelfClosingElement(node);
-                }
-            }
-            function emitExpressionForPropertyName(node) {
-                ts.Debug.assert(node.kind !== 169);
-                if (node.kind === 9) {
-                    emitLiteral(node);
-                }
-                else if (node.kind === 140) {
-                    if (ts.nodeIsDecorated(node.parent)) {
-                        if (!computedPropertyNamesToGeneratedNames) {
-                            computedPropertyNamesToGeneratedNames = [];
-                        }
-                        var generatedName = computedPropertyNamesToGeneratedNames[ts.getNodeId(node)];
-                        if (generatedName) {
-                            write(generatedName);
-                            return;
-                        }
-                        generatedName = createAndRecordTempVariable(0).text;
-                        computedPropertyNamesToGeneratedNames[ts.getNodeId(node)] = generatedName;
-                        write(generatedName);
-                        write(" = ");
-                    }
-                    emit(node.expression);
-                }
-                else {
-                    write('"');
-                    if (node.kind === 8) {
-                        write(node.text);
-                    }
-                    else {
-                        writeTextOfNode(currentText, node);
-                    }
-                    write('"');
-                }
-            }
-            function isExpressionIdentifier(node) {
-                var parent = node.parent;
-                switch (parent.kind) {
-                    case 170:
-                    case 195:
-                    case 184:
-                    case 187:
-                    case 174:
-                    case 249:
-                    case 140:
-                    case 188:
-                    case 143:
-                    case 181:
-                    case 204:
-                    case 173:
-                    case 235:
-                    case 202:
-                    case 194:
-                    case 206:
-                    case 207:
-                    case 208:
-                    case 203:
-                    case 245:
-                    case 242:
-                    case 243:
-                    case 247:
-                    case 248:
-                    case 175:
-                    case 196:
-                    case 178:
-                    case 186:
-                    case 185:
-                    case 211:
-                    case 254:
-                    case 191:
-                    case 213:
-                    case 176:
-                    case 197:
-                    case 215:
-                    case 177:
-                    case 182:
-                    case 183:
-                    case 205:
-                    case 212:
-                    case 190:
-                        return true;
-                    case 169:
-                    case 255:
-                    case 142:
-                    case 253:
-                    case 145:
-                    case 218:
-                        return parent.initializer === node;
-                    case 172:
-                        return parent.expression === node;
-                    case 180:
-                    case 179:
-                        return parent.body === node;
-                    case 229:
-                        return parent.moduleReference === node;
-                    case 139:
-                        return parent.left === node;
-                }
-                return false;
-            }
-            function emitExpressionIdentifier(node) {
-                var container = resolver.getReferencedExportContainer(node);
-                if (container) {
-                    if (container.kind === 256) {
-                        if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
-                            write("exports.");
-                        }
-                    }
-                    else {
-                        write(getGeneratedNameForNode(container));
-                        write(".");
-                    }
-                }
-                else {
-                    if (modulekind !== ts.ModuleKind.ES6) {
-                        var declaration = resolver.getReferencedImportDeclaration(node);
-                        if (declaration) {
-                            if (declaration.kind === 231) {
-                                write(getGeneratedNameForNode(declaration.parent));
-                                write(languageVersion === 0 ? '["default"]' : ".default");
-                                return;
-                            }
-                            else if (declaration.kind === 234) {
-                                write(getGeneratedNameForNode(declaration.parent.parent.parent));
-                                var name_25 = declaration.propertyName || declaration.name;
-                                var identifier = ts.getTextOfNodeFromSourceText(currentText, name_25);
-                                if (languageVersion === 0 && identifier === "default") {
-                                    write('["default"]');
-                                }
-                                else {
-                                    write(".");
-                                    write(identifier);
-                                }
-                                return;
-                            }
-                        }
-                    }
-                    if (languageVersion < 2) {
-                        var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
-                        if (declaration) {
-                            write(getGeneratedNameForNode(declaration.name));
-                            return;
-                        }
-                    }
-                    else if (resolver.getNodeCheckFlags(node) & 1048576) {
-                        var declaration = resolver.getReferencedValueDeclaration(node);
-                        if (declaration) {
-                            var classAlias = decoratedClassAliases[ts.getNodeId(declaration)];
-                            if (classAlias !== undefined) {
-                                write(classAlias);
-                                return;
-                            }
-                        }
-                    }
-                }
-                if (ts.nodeIsSynthesized(node)) {
-                    write(node.text);
-                }
-                else {
-                    writeTextOfNode(currentText, node);
-                }
-            }
-            function isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node) {
-                if (languageVersion < 2) {
-                    var parent_13 = node.parent;
-                    switch (parent_13.kind) {
-                        case 169:
-                        case 221:
-                        case 224:
-                        case 218:
-                            return parent_13.name === node && resolver.isDeclarationWithCollidingName(parent_13);
-                    }
-                }
-                return false;
-            }
-            function emitIdentifier(node) {
-                if (convertedLoopState) {
-                    if (node.text == "arguments" && resolver.isArgumentsLocalBinding(node)) {
-                        var name_26 = convertedLoopState.argumentsName || (convertedLoopState.argumentsName = makeUniqueName("arguments"));
-                        write(name_26);
-                        return;
-                    }
-                }
-                if (!node.parent) {
-                    write(node.text);
-                }
-                else if (isExpressionIdentifier(node)) {
-                    emitExpressionIdentifier(node);
-                }
-                else if (isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node)) {
-                    write(getGeneratedNameForNode(node));
-                }
-                else if (ts.nodeIsSynthesized(node)) {
-                    write(node.text);
-                }
-                else {
-                    writeTextOfNode(currentText, node);
-                }
-            }
-            function emitThis(node) {
-                if (resolver.getNodeCheckFlags(node) & 2) {
-                    write("_this");
-                }
-                else if (convertedLoopState) {
-                    write(convertedLoopState.thisName || (convertedLoopState.thisName = makeUniqueName("this")));
-                }
-                else {
-                    write("this");
-                }
-            }
-            function emitSuper(node) {
-                if (languageVersion >= 2) {
-                    write("super");
-                }
-                else {
-                    var flags = resolver.getNodeCheckFlags(node);
-                    if (flags & 256) {
-                        write("_super.prototype");
-                    }
-                    else {
-                        write("_super");
-                    }
-                }
-            }
-            function emitObjectBindingPattern(node) {
-                write("{ ");
-                var elements = node.elements;
-                emitList(elements, 0, elements.length, false, elements.hasTrailingComma);
-                write(" }");
-            }
-            function emitArrayBindingPattern(node) {
-                write("[");
-                var elements = node.elements;
-                emitList(elements, 0, elements.length, false, elements.hasTrailingComma);
-                write("]");
-            }
-            function emitBindingElement(node) {
-                if (node.propertyName) {
-                    emit(node.propertyName);
-                    write(": ");
-                }
-                if (node.dotDotDotToken) {
-                    write("...");
-                }
-                if (ts.isBindingPattern(node.name)) {
-                    emit(node.name);
-                }
-                else {
-                    emitModuleMemberName(node);
-                }
-                emitOptional(" = ", node.initializer);
-            }
-            function emitSpreadElementExpression(node) {
-                write("...");
-                emit(node.expression);
-            }
-            function emitYieldExpression(node) {
-                write(ts.tokenToString(114));
-                if (node.asteriskToken) {
-                    write("*");
-                }
-                if (node.expression) {
-                    write(" ");
-                    emit(node.expression);
-                }
-            }
-            function emitAwaitExpression(node) {
-                var needsParenthesis = needsParenthesisForAwaitExpressionAsYield(node);
-                if (needsParenthesis) {
-                    write("(");
-                }
-                write(ts.tokenToString(114));
-                write(" ");
-                emit(node.expression);
-                if (needsParenthesis) {
-                    write(")");
-                }
-            }
-            function needsParenthesisForAwaitExpressionAsYield(node) {
-                if (node.parent.kind === 187 && !ts.isAssignmentOperator(node.parent.operatorToken.kind)) {
-                    return true;
-                }
-                else if (node.parent.kind === 188 && node.parent.condition === node) {
-                    return true;
-                }
-                return false;
-            }
-            function needsParenthesisForPropertyAccessOrInvocation(node) {
-                switch (node.kind) {
-                    case 69:
-                    case 170:
-                    case 172:
-                    case 173:
-                    case 174:
-                    case 178:
-                        return false;
-                }
-                return true;
-            }
-            function emitListWithSpread(elements, needsUniqueCopy, multiLine, trailingComma, useConcat) {
-                var pos = 0;
-                var group = 0;
-                var length = elements.length;
-                while (pos < length) {
-                    if (group === 1 && useConcat) {
-                        write(".concat(");
-                    }
-                    else if (group > 0) {
-                        write(", ");
-                    }
-                    var e = elements[pos];
-                    if (e.kind === 191) {
-                        e = e.expression;
-                        emitParenthesizedIf(e, group === 0 && needsParenthesisForPropertyAccessOrInvocation(e));
-                        pos++;
-                        if (pos === length && group === 0 && needsUniqueCopy && e.kind !== 170) {
-                            write(".slice()");
-                        }
-                    }
-                    else {
-                        var i = pos;
-                        while (i < length && elements[i].kind !== 191) {
-                            i++;
-                        }
-                        write("[");
-                        if (multiLine) {
-                            increaseIndent();
-                        }
-                        emitList(elements, pos, i - pos, multiLine, trailingComma && i === length);
-                        if (multiLine) {
-                            decreaseIndent();
-                        }
-                        write("]");
-                        pos = i;
-                    }
-                    group++;
-                }
-                if (group > 1) {
-                    if (useConcat) {
-                        write(")");
-                    }
-                }
-            }
-            function isSpreadElementExpression(node) {
-                return node.kind === 191;
-            }
-            function emitArrayLiteral(node) {
-                var elements = node.elements;
-                if (elements.length === 0) {
-                    write("[]");
-                }
-                else if (languageVersion >= 2 || !ts.forEach(elements, isSpreadElementExpression)) {
-                    write("[");
-                    emitLinePreservingList(node, node.elements, elements.hasTrailingComma, false);
-                    write("]");
-                }
-                else {
-                    emitListWithSpread(elements, true, node.multiLine, elements.hasTrailingComma, true);
-                }
-            }
-            function emitObjectLiteralBody(node, numElements) {
-                if (numElements === 0) {
-                    write("{}");
-                    return;
-                }
-                write("{");
-                if (numElements > 0) {
-                    var properties = node.properties;
-                    if (numElements === properties.length) {
-                        emitLinePreservingList(node, properties, languageVersion >= 1, true);
-                    }
-                    else {
-                        var multiLine = node.multiLine;
-                        if (!multiLine) {
-                            write(" ");
-                        }
-                        else {
-                            increaseIndent();
-                        }
-                        emitList(properties, 0, numElements, multiLine, false);
-                        if (!multiLine) {
-                            write(" ");
-                        }
-                        else {
-                            decreaseIndent();
-                        }
-                    }
-                }
-                write("}");
-            }
-            function emitDownlevelObjectLiteralWithComputedProperties(node, firstComputedPropertyIndex) {
-                var multiLine = node.multiLine;
-                var properties = node.properties;
-                write("(");
-                if (multiLine) {
-                    increaseIndent();
-                }
-                var tempVar = createAndRecordTempVariable(0);
-                emit(tempVar);
-                write(" = ");
-                emitObjectLiteralBody(node, firstComputedPropertyIndex);
-                for (var i = firstComputedPropertyIndex, n = properties.length; i < n; i++) {
-                    writeComma();
-                    var property = properties[i];
-                    emitStart(property);
-                    if (property.kind === 149 || property.kind === 150) {
-                        var accessors = ts.getAllAccessorDeclarations(node.properties, property);
-                        if (property !== accessors.firstAccessor) {
-                            continue;
-                        }
-                        write("Object.defineProperty(");
-                        emit(tempVar);
-                        write(", ");
-                        emitStart(property.name);
-                        emitExpressionForPropertyName(property.name);
-                        emitEnd(property.name);
-                        write(", {");
-                        increaseIndent();
-                        if (accessors.getAccessor) {
-                            writeLine();
-                            emitLeadingComments(accessors.getAccessor);
-                            write("get: ");
-                            emitStart(accessors.getAccessor);
-                            write("function ");
-                            emitSignatureAndBody(accessors.getAccessor);
-                            emitEnd(accessors.getAccessor);
-                            emitTrailingComments(accessors.getAccessor);
-                            write(",");
-                        }
-                        if (accessors.setAccessor) {
-                            writeLine();
-                            emitLeadingComments(accessors.setAccessor);
-                            write("set: ");
-                            emitStart(accessors.setAccessor);
-                            write("function ");
-                            emitSignatureAndBody(accessors.setAccessor);
-                            emitEnd(accessors.setAccessor);
-                            emitTrailingComments(accessors.setAccessor);
-                            write(",");
-                        }
-                        writeLine();
-                        write("enumerable: true,");
-                        writeLine();
-                        write("configurable: true");
-                        decreaseIndent();
-                        writeLine();
-                        write("})");
-                        emitEnd(property);
-                    }
-                    else {
-                        emitLeadingComments(property);
-                        emitStart(property.name);
-                        emit(tempVar);
-                        emitMemberAccessForPropertyName(property.name);
-                        emitEnd(property.name);
-                        write(" = ");
-                        if (property.kind === 253) {
-                            emit(property.initializer);
-                        }
-                        else if (property.kind === 254) {
-                            emitExpressionIdentifier(property.name);
-                        }
-                        else if (property.kind === 147) {
-                            emitFunctionDeclaration(property);
-                        }
-                        else {
-                            ts.Debug.fail("ObjectLiteralElement type not accounted for: " + property.kind);
-                        }
-                    }
-                    emitEnd(property);
-                }
-                writeComma();
-                emit(tempVar);
-                if (multiLine) {
-                    decreaseIndent();
-                    writeLine();
-                }
-                write(")");
-                function writeComma() {
-                    if (multiLine) {
-                        write(",");
-                        writeLine();
-                    }
-                    else {
-                        write(", ");
-                    }
-                }
-            }
-            function emitObjectLiteral(node) {
-                var properties = node.properties;
-                if (languageVersion < 2) {
-                    var numProperties = properties.length;
-                    var numInitialNonComputedProperties = numProperties;
-                    for (var i = 0, n = properties.length; i < n; i++) {
-                        if (properties[i].name.kind === 140) {
-                            numInitialNonComputedProperties = i;
-                            break;
-                        }
-                    }
-                    var hasComputedProperty = numInitialNonComputedProperties !== properties.length;
-                    if (hasComputedProperty) {
-                        emitDownlevelObjectLiteralWithComputedProperties(node, numInitialNonComputedProperties);
-                        return;
-                    }
-                }
-                emitObjectLiteralBody(node, properties.length);
-            }
-            function createBinaryExpression(left, operator, right, startsOnNewLine) {
-                var result = ts.createSynthesizedNode(187, startsOnNewLine);
-                result.operatorToken = ts.createSynthesizedNode(operator);
-                result.left = left;
-                result.right = right;
-                return result;
-            }
-            function createPropertyAccessExpression(expression, name) {
-                var result = ts.createSynthesizedNode(172);
-                result.expression = parenthesizeForAccess(expression);
-                result.dotToken = ts.createSynthesizedNode(21);
-                result.name = name;
-                return result;
-            }
-            function createElementAccessExpression(expression, argumentExpression) {
-                var result = ts.createSynthesizedNode(173);
-                result.expression = parenthesizeForAccess(expression);
-                result.argumentExpression = argumentExpression;
-                return result;
-            }
-            function parenthesizeForAccess(expr) {
-                while (expr.kind === 177 ||
-                    expr.kind === 195 ||
-                    expr.kind === 196) {
-                    expr = expr.expression;
-                }
-                if (ts.isLeftHandSideExpression(expr) &&
-                    expr.kind !== 175 &&
-                    expr.kind !== 8) {
-                    return expr;
-                }
-                var node = ts.createSynthesizedNode(178);
-                node.expression = expr;
-                return node;
-            }
-            function emitComputedPropertyName(node) {
-                write("[");
-                emitExpressionForPropertyName(node);
-                write("]");
-            }
-            function emitMethod(node) {
-                if (languageVersion >= 2 && node.asteriskToken) {
-                    write("*");
-                }
-                emit(node.name);
-                if (languageVersion < 2) {
-                    write(": function ");
-                }
-                emitSignatureAndBody(node);
-            }
-            function emitPropertyAssignment(node) {
-                emit(node.name);
-                write(": ");
-                emitTrailingCommentsOfPosition(node.initializer.pos);
-                emit(node.initializer);
-            }
-            function isNamespaceExportReference(node) {
-                var container = resolver.getReferencedExportContainer(node);
-                return container && container.kind !== 256;
-            }
-            function isImportedReference(node) {
-                var declaration = resolver.getReferencedImportDeclaration(node);
-                return declaration && (declaration.kind === 231 || declaration.kind === 234);
-            }
-            function emitShorthandPropertyAssignment(node) {
-                writeTextOfNode(currentText, node.name);
-                if (languageVersion < 2 || (modulekind !== ts.ModuleKind.ES6 && isImportedReference(node.name)) || isNamespaceExportReference(node.name)) {
-                    write(": ");
-                    emit(node.name);
-                }
-                if (languageVersion >= 2 && node.objectAssignmentInitializer) {
-                    write(" = ");
-                    emit(node.objectAssignmentInitializer);
-                }
-            }
-            function tryEmitConstantValue(node) {
-                var constantValue = tryGetConstEnumValue(node);
-                if (constantValue !== undefined) {
-                    write(constantValue.toString());
-                    if (!compilerOptions.removeComments) {
-                        var propertyName = node.kind === 172 ? ts.declarationNameToString(node.name) : ts.getTextOfNode(node.argumentExpression);
-                        write(" /* " + propertyName + " */");
-                    }
-                    return true;
-                }
-                return false;
-            }
-            function tryGetConstEnumValue(node) {
-                if (compilerOptions.isolatedModules) {
-                    return undefined;
-                }
-                return node.kind === 172 || node.kind === 173
-                    ? resolver.getConstantValue(node)
-                    : undefined;
-            }
-            function indentIfOnDifferentLines(parent, node1, node2, valueToWriteWhenNotIndenting) {
-                var realNodesAreOnDifferentLines = !ts.nodeIsSynthesized(parent) && !nodeEndIsOnSameLineAsNodeStart(node1, node2);
-                var synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2);
-                if (realNodesAreOnDifferentLines || synthesizedNodeIsOnDifferentLine) {
-                    increaseIndent();
-                    writeLine();
-                    return true;
-                }
-                else {
-                    if (valueToWriteWhenNotIndenting) {
-                        write(valueToWriteWhenNotIndenting);
-                    }
-                    return false;
-                }
-            }
-            function emitPropertyAccess(node) {
-                if (tryEmitConstantValue(node)) {
-                    return;
-                }
-                if (languageVersion === 2 &&
-                    node.expression.kind === 95 &&
-                    isInAsyncMethodWithSuperInES6(node)) {
-                    var name_27 = ts.createSynthesizedNode(9);
-                    name_27.text = node.name.text;
-                    emitSuperAccessInAsyncMethod(node.expression, name_27);
-                    return;
-                }
-                emit(node.expression);
-                var indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, node.dotToken);
-                var shouldEmitSpace = false;
-                if (!indentedBeforeDot) {
-                    if (node.expression.kind === 8) {
-                        var text = ts.getTextOfNodeFromSourceText(currentText, node.expression);
-                        shouldEmitSpace = text.indexOf(ts.tokenToString(21)) < 0;
-                    }
-                    else {
-                        var constantValue = tryGetConstEnumValue(node.expression);
-                        shouldEmitSpace = isFinite(constantValue) && Math.floor(constantValue) === constantValue;
-                    }
-                }
-                if (shouldEmitSpace) {
-                    write(" .");
-                }
-                else {
-                    write(".");
-                }
-                var indentedAfterDot = indentIfOnDifferentLines(node, node.dotToken, node.name);
-                emit(node.name);
-                decreaseIndentIf(indentedBeforeDot, indentedAfterDot);
-            }
-            function emitQualifiedName(node) {
-                emit(node.left);
-                write(".");
-                emit(node.right);
-            }
-            function emitQualifiedNameAsExpression(node, useFallback) {
-                if (node.left.kind === 69) {
-                    emitEntityNameAsExpression(node.left, useFallback);
-                }
-                else if (useFallback) {
-                    var temp = createAndRecordTempVariable(0);
-                    write("(");
-                    emitNodeWithoutSourceMap(temp);
-                    write(" = ");
-                    emitEntityNameAsExpression(node.left, true);
-                    write(") && ");
-                    emitNodeWithoutSourceMap(temp);
-                }
-                else {
-                    emitEntityNameAsExpression(node.left, false);
-                }
-                write(".");
-                emit(node.right);
-            }
-            function emitEntityNameAsExpression(node, useFallback) {
-                switch (node.kind) {
-                    case 69:
-                        if (useFallback) {
-                            write("typeof ");
-                            emitExpressionIdentifier(node);
-                            write(" !== 'undefined' && ");
-                        }
-                        emitExpressionIdentifier(node);
-                        break;
-                    case 139:
-                        emitQualifiedNameAsExpression(node, useFallback);
-                        break;
-                    default:
-                        emitNodeWithoutSourceMap(node);
-                        break;
-                }
-            }
-            function emitIndexedAccess(node) {
-                if (tryEmitConstantValue(node)) {
-                    return;
-                }
-                if (languageVersion === 2 &&
-                    node.expression.kind === 95 &&
-                    isInAsyncMethodWithSuperInES6(node)) {
-                    emitSuperAccessInAsyncMethod(node.expression, node.argumentExpression);
-                    return;
-                }
-                emit(node.expression);
-                write("[");
-                emit(node.argumentExpression);
-                write("]");
-            }
-            function hasSpreadElement(elements) {
-                return ts.forEach(elements, function (e) { return e.kind === 191; });
-            }
-            function skipParentheses(node) {
-                while (node.kind === 178 ||
-                    node.kind === 177 ||
-                    node.kind === 195 ||
-                    node.kind === 196) {
-                    node = node.expression;
-                }
-                return node;
-            }
-            function emitCallTarget(node) {
-                if (node.kind === 69 || node.kind === 97 || node.kind === 95) {
-                    emit(node);
-                    return node;
-                }
-                var temp = createAndRecordTempVariable(0);
-                write("(");
-                emit(temp);
-                write(" = ");
-                emit(node);
-                write(")");
-                return temp;
-            }
-            function emitCallWithSpread(node) {
-                var target;
-                var expr = skipParentheses(node.expression);
-                if (expr.kind === 172) {
-                    target = emitCallTarget(expr.expression);
-                    write(".");
-                    emit(expr.name);
-                }
-                else if (expr.kind === 173) {
-                    target = emitCallTarget(expr.expression);
-                    write("[");
-                    emit(expr.argumentExpression);
-                    write("]");
-                }
-                else if (expr.kind === 95) {
-                    target = expr;
-                    write("_super");
-                }
-                else {
-                    emit(node.expression);
-                }
-                write(".apply(");
-                if (target) {
-                    if (target.kind === 95) {
-                        emitThis(target);
-                    }
-                    else {
-                        emit(target);
-                    }
-                }
-                else {
-                    write("void 0");
-                }
-                write(", ");
-                emitListWithSpread(node.arguments, false, false, false, true);
-                write(")");
-            }
-            function isInAsyncMethodWithSuperInES6(node) {
-                if (languageVersion === 2) {
-                    var container = ts.getSuperContainer(node, false);
-                    if (container && resolver.getNodeCheckFlags(container) & (2048 | 4096)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function emitSuperAccessInAsyncMethod(superNode, argumentExpression) {
-                var container = ts.getSuperContainer(superNode, false);
-                var isSuperBinding = resolver.getNodeCheckFlags(container) & 4096;
-                write("_super(");
-                emit(argumentExpression);
-                write(isSuperBinding ? ").value" : ")");
-            }
-            function emitCallExpression(node) {
-                if (languageVersion < 2 && hasSpreadElement(node.arguments)) {
-                    emitCallWithSpread(node);
-                    return;
-                }
-                var expression = node.expression;
-                var superCall = false;
-                var isAsyncMethodWithSuper = false;
-                if (expression.kind === 95) {
-                    emitSuper(expression);
-                    superCall = true;
-                }
-                else {
-                    superCall = ts.isSuperPropertyOrElementAccess(expression);
-                    isAsyncMethodWithSuper = superCall && isInAsyncMethodWithSuperInES6(node);
-                    emit(expression);
-                }
-                if (superCall && (languageVersion < 2 || isAsyncMethodWithSuper)) {
-                    write(".call(");
-                    emitThis(expression);
-                    if (node.arguments.length) {
-                        write(", ");
-                        emitCommaList(node.arguments);
-                    }
-                    write(")");
-                }
-                else {
-                    write("(");
-                    emitCommaList(node.arguments);
-                    write(")");
-                }
-            }
-            function emitNewExpression(node) {
-                write("new ");
-                if (languageVersion === 1 &&
-                    node.arguments &&
-                    hasSpreadElement(node.arguments)) {
-                    write("(");
-                    var target = emitCallTarget(node.expression);
-                    write(".bind.apply(");
-                    emit(target);
-                    write(", [void 0].concat(");
-                    emitListWithSpread(node.arguments, false, false, false, false);
-                    write(")))");
-                    write("()");
-                }
-                else {
-                    emit(node.expression);
-                    if (node.arguments) {
-                        write("(");
-                        emitCommaList(node.arguments);
-                        write(")");
-                    }
-                }
-            }
-            function emitTaggedTemplateExpression(node) {
-                if (languageVersion >= 2) {
-                    emit(node.tag);
-                    write(" ");
-                    emit(node.template);
-                }
-                else {
-                    emitDownlevelTaggedTemplate(node);
-                }
-            }
-            function emitParenExpression(node) {
-                if (!ts.nodeIsSynthesized(node) && node.parent.kind !== 180) {
-                    if (node.expression.kind === 177 ||
-                        node.expression.kind === 195 ||
-                        node.expression.kind === 196) {
-                        var operand = node.expression.expression;
-                        while (operand.kind === 177 ||
-                            operand.kind === 195 ||
-                            operand.kind === 196) {
-                            operand = operand.expression;
-                        }
-                        if (operand.kind !== 185 &&
-                            operand.kind !== 183 &&
-                            operand.kind !== 182 &&
-                            operand.kind !== 181 &&
-                            operand.kind !== 186 &&
-                            operand.kind !== 175 &&
-                            !(operand.kind === 174 && node.parent.kind === 175) &&
-                            !(operand.kind === 179 && node.parent.kind === 174) &&
-                            !(operand.kind === 8 && node.parent.kind === 172)) {
-                            emit(operand);
-                            return;
-                        }
-                    }
-                }
-                write("(");
-                emit(node.expression);
-                write(")");
-            }
-            function emitDeleteExpression(node) {
-                write(ts.tokenToString(78));
-                write(" ");
-                emit(node.expression);
-            }
-            function emitVoidExpression(node) {
-                write(ts.tokenToString(103));
-                write(" ");
-                emit(node.expression);
-            }
-            function emitTypeOfExpression(node) {
-                write(ts.tokenToString(101));
-                write(" ");
-                emit(node.expression);
-            }
-            function isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node) {
-                if (!isCurrentFileSystemExternalModule() || node.kind !== 69 || ts.nodeIsSynthesized(node)) {
-                    return false;
-                }
-                var isVariableDeclarationOrBindingElement = node.parent && (node.parent.kind === 218 || node.parent.kind === 169);
-                var targetDeclaration = isVariableDeclarationOrBindingElement
-                    ? node.parent
-                    : resolver.getReferencedValueDeclaration(node);
-                return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, true);
-            }
-            function emitPrefixUnaryExpression(node) {
-                var exportChanged = (node.operator === 41 || node.operator === 42) &&
-                    isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
-                if (exportChanged) {
-                    write(exportFunctionForFile + "(\"");
-                    emitNodeWithoutSourceMap(node.operand);
-                    write("\", ");
-                }
-                write(ts.tokenToString(node.operator));
-                if (node.operand.kind === 185) {
-                    var operand = node.operand;
-                    if (node.operator === 35 && (operand.operator === 35 || operand.operator === 41)) {
-                        write(" ");
-                    }
-                    else if (node.operator === 36 && (operand.operator === 36 || operand.operator === 42)) {
-                        write(" ");
-                    }
-                }
-                emit(node.operand);
-                if (exportChanged) {
-                    write(")");
-                }
-            }
-            function emitPostfixUnaryExpression(node) {
-                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
-                if (exportChanged) {
-                    write("(" + exportFunctionForFile + "(\"");
-                    emitNodeWithoutSourceMap(node.operand);
-                    write("\", ");
-                    write(ts.tokenToString(node.operator));
-                    emit(node.operand);
-                    if (node.operator === 41) {
-                        write(") - 1)");
-                    }
-                    else {
-                        write(") + 1)");
-                    }
-                }
-                else {
-                    emit(node.operand);
-                    write(ts.tokenToString(node.operator));
-                }
-            }
-            function shouldHoistDeclarationInSystemJsModule(node) {
-                return isSourceFileLevelDeclarationInSystemJsModule(node, false);
-            }
-            function isSourceFileLevelDeclarationInSystemJsModule(node, isExported) {
-                if (!node || !isCurrentFileSystemExternalModule()) {
-                    return false;
-                }
-                var current = ts.getRootDeclaration(node).parent;
-                while (current) {
-                    if (current.kind === 256) {
-                        return !isExported || ((ts.getCombinedNodeFlags(node) & 1) !== 0);
-                    }
-                    else if (ts.isDeclaration(current)) {
-                        return false;
-                    }
-                    else {
-                        current = current.parent;
-                    }
-                }
-            }
-            function emitExponentiationOperator(node) {
-                var leftHandSideExpression = node.left;
-                if (node.operatorToken.kind === 60) {
-                    var synthesizedLHS = void 0;
-                    var shouldEmitParentheses = false;
-                    if (ts.isElementAccessExpression(leftHandSideExpression)) {
-                        shouldEmitParentheses = true;
-                        write("(");
-                        synthesizedLHS = ts.createSynthesizedNode(173, false);
-                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, false, false);
-                        synthesizedLHS.expression = identifier;
-                        if (leftHandSideExpression.argumentExpression.kind !== 8 &&
-                            leftHandSideExpression.argumentExpression.kind !== 9) {
-                            var tempArgumentExpression = createAndRecordTempVariable(268435456);
-                            synthesizedLHS.argumentExpression = tempArgumentExpression;
-                            emitAssignment(tempArgumentExpression, leftHandSideExpression.argumentExpression, true, leftHandSideExpression.expression);
-                        }
-                        else {
-                            synthesizedLHS.argumentExpression = leftHandSideExpression.argumentExpression;
-                        }
-                        write(", ");
-                    }
-                    else if (ts.isPropertyAccessExpression(leftHandSideExpression)) {
-                        shouldEmitParentheses = true;
-                        write("(");
-                        synthesizedLHS = ts.createSynthesizedNode(172, false);
-                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, false, false);
-                        synthesizedLHS.expression = identifier;
-                        synthesizedLHS.dotToken = leftHandSideExpression.dotToken;
-                        synthesizedLHS.name = leftHandSideExpression.name;
-                        write(", ");
-                    }
-                    emit(synthesizedLHS || leftHandSideExpression);
-                    write(" = ");
-                    write("Math.pow(");
-                    emit(synthesizedLHS || leftHandSideExpression);
-                    write(", ");
-                    emit(node.right);
-                    write(")");
-                    if (shouldEmitParentheses) {
-                        write(")");
-                    }
-                }
-                else {
-                    write("Math.pow(");
-                    emit(leftHandSideExpression);
-                    write(", ");
-                    emit(node.right);
-                    write(")");
-                }
-            }
-            function emitBinaryExpression(node) {
-                if (languageVersion < 2 && node.operatorToken.kind === 56 &&
-                    (node.left.kind === 171 || node.left.kind === 170)) {
-                    emitDestructuring(node, node.parent.kind === 202);
-                }
-                else {
-                    var exportChanged = node.operatorToken.kind >= 56 &&
-                        node.operatorToken.kind <= 68 &&
-                        isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left);
-                    if (exportChanged) {
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithoutSourceMap(node.left);
-                        write("\", ");
-                    }
-                    if (node.operatorToken.kind === 38 || node.operatorToken.kind === 60) {
-                        emitExponentiationOperator(node);
-                    }
-                    else {
-                        emit(node.left);
-                        var indentedBeforeOperator = indentIfOnDifferentLines(node, node.left, node.operatorToken, node.operatorToken.kind !== 24 ? " " : undefined);
-                        write(ts.tokenToString(node.operatorToken.kind));
-                        var indentedAfterOperator = indentIfOnDifferentLines(node, node.operatorToken, node.right, " ");
-                        emit(node.right);
-                        decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator);
-                    }
-                    if (exportChanged) {
-                        write(")");
-                    }
-                }
-            }
-            function synthesizedNodeStartsOnNewLine(node) {
-                return ts.nodeIsSynthesized(node) && node.startsOnNewLine;
-            }
-            function emitConditionalExpression(node) {
-                emit(node.condition);
-                var indentedBeforeQuestion = indentIfOnDifferentLines(node, node.condition, node.questionToken, " ");
-                write("?");
-                var indentedAfterQuestion = indentIfOnDifferentLines(node, node.questionToken, node.whenTrue, " ");
-                emit(node.whenTrue);
-                decreaseIndentIf(indentedBeforeQuestion, indentedAfterQuestion);
-                var indentedBeforeColon = indentIfOnDifferentLines(node, node.whenTrue, node.colonToken, " ");
-                write(":");
-                var indentedAfterColon = indentIfOnDifferentLines(node, node.colonToken, node.whenFalse, " ");
-                emit(node.whenFalse);
-                decreaseIndentIf(indentedBeforeColon, indentedAfterColon);
-            }
-            function decreaseIndentIf(value1, value2) {
-                if (value1) {
-                    decreaseIndent();
-                }
-                if (value2) {
-                    decreaseIndent();
-                }
-            }
-            function isSingleLineEmptyBlock(node) {
-                if (node && node.kind === 199) {
-                    var block = node;
-                    return block.statements.length === 0 && nodeEndIsOnSameLineAsNodeStart(block, block);
-                }
-            }
-            function emitBlock(node) {
-                if (isSingleLineEmptyBlock(node)) {
-                    emitToken(15, node.pos);
-                    write(" ");
-                    emitToken(16, node.statements.end);
-                    return;
-                }
-                emitToken(15, node.pos);
-                increaseIndent();
-                if (node.kind === 226) {
-                    ts.Debug.assert(node.parent.kind === 225);
-                    emitCaptureThisForNodeIfNecessary(node.parent);
-                }
-                emitLines(node.statements);
-                if (node.kind === 226) {
-                    emitTempDeclarations(true);
-                }
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.statements.end);
-            }
-            function emitEmbeddedStatement(node) {
-                if (node.kind === 199) {
-                    write(" ");
-                    emit(node);
-                }
-                else {
-                    increaseIndent();
-                    writeLine();
-                    emit(node);
-                    decreaseIndent();
-                }
-            }
-            function emitExpressionStatement(node) {
-                emitParenthesizedIf(node.expression, node.expression.kind === 180);
-                write(";");
-            }
-            function emitIfStatement(node) {
-                var endPos = emitToken(88, node.pos);
-                write(" ");
-                endPos = emitToken(17, endPos);
-                emit(node.expression);
-                emitToken(18, node.expression.end);
-                emitEmbeddedStatement(node.thenStatement);
-                if (node.elseStatement) {
-                    writeLine();
-                    emitToken(80, node.thenStatement.end);
-                    if (node.elseStatement.kind === 203) {
-                        write(" ");
-                        emit(node.elseStatement);
-                    }
-                    else {
-                        emitEmbeddedStatement(node.elseStatement);
-                    }
-                }
-            }
-            function emitDoStatement(node) {
-                emitLoop(node, emitDoStatementWorker);
-            }
-            function emitDoStatementWorker(node, loop) {
-                write("do");
-                if (loop) {
-                    emitConvertedLoopCall(loop, true);
-                }
-                else {
-                    emitNormalLoopBody(node, true);
-                }
-                if (node.statement.kind === 199) {
-                    write(" ");
-                }
-                else {
-                    writeLine();
-                }
-                write("while (");
-                emit(node.expression);
-                write(");");
-            }
-            function emitWhileStatement(node) {
-                emitLoop(node, emitWhileStatementWorker);
-            }
-            function emitWhileStatementWorker(node, loop) {
-                write("while (");
-                emit(node.expression);
-                write(")");
-                if (loop) {
-                    emitConvertedLoopCall(loop, true);
-                }
-                else {
-                    emitNormalLoopBody(node, true);
-                }
-            }
-            function tryEmitStartOfVariableDeclarationList(decl) {
-                if (shouldHoistVariable(decl, true)) {
-                    return false;
-                }
-                if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072) === 0) {
-                    for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) {
-                        var varDecl = _b[_a];
-                        hoistVariableDeclarationFromLoop(convertedLoopState, varDecl);
-                    }
-                    return false;
-                }
-                emitStart(decl);
-                if (decl && languageVersion >= 2) {
-                    if (ts.isLet(decl)) {
-                        write("let ");
-                    }
-                    else if (ts.isConst(decl)) {
-                        write("const ");
-                    }
-                    else {
-                        write("var ");
-                    }
-                }
-                else {
-                    write("var ");
-                }
-                return true;
-            }
-            function emitVariableDeclarationListSkippingUninitializedEntries(list) {
-                var started = false;
-                for (var _a = 0, _b = list.declarations; _a < _b.length; _a++) {
-                    var decl = _b[_a];
-                    if (!decl.initializer) {
-                        continue;
-                    }
-                    if (!started) {
-                        started = true;
-                    }
-                    else {
-                        write(", ");
-                    }
-                    emit(decl);
-                }
-                return started;
-            }
-            function shouldConvertLoopBody(node) {
-                return languageVersion < 2 &&
-                    (resolver.getNodeCheckFlags(node) & 65536) !== 0;
-            }
-            function emitLoop(node, loopEmitter) {
-                var shouldConvert = shouldConvertLoopBody(node);
-                if (!shouldConvert) {
-                    loopEmitter(node, undefined);
-                }
-                else {
-                    var loop = convertLoopBody(node);
-                    if (node.parent.kind === 214) {
-                        emitLabelAndColon(node.parent);
-                    }
-                    loopEmitter(node, loop);
-                }
-            }
-            function convertLoopBody(node) {
-                var functionName = makeUniqueName("_loop");
-                var loopInitializer;
-                switch (node.kind) {
-                    case 206:
-                    case 207:
-                    case 208:
-                        var initializer = node.initializer;
-                        if (initializer && initializer.kind === 219) {
-                            loopInitializer = node.initializer;
-                        }
-                        break;
-                }
-                var loopParameters;
-                var loopOutParameters;
-                if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3072)) {
-                    loopParameters = [];
-                    for (var _a = 0, _b = loopInitializer.declarations; _a < _b.length; _a++) {
-                        var varDeclaration = _b[_a];
-                        processVariableDeclaration(varDeclaration.name);
-                    }
-                }
-                var bodyIsBlock = node.statement.kind === 199;
-                var paramList = loopParameters ? loopParameters.join(", ") : "";
-                writeLine();
-                write("var " + functionName + " = function(" + paramList + ")");
-                var convertedOuterLoopState = convertedLoopState;
-                convertedLoopState = { loopOutParameters: loopOutParameters };
-                if (convertedOuterLoopState) {
-                    if (convertedOuterLoopState.argumentsName) {
-                        convertedLoopState.argumentsName = convertedOuterLoopState.argumentsName;
-                    }
-                    if (convertedOuterLoopState.thisName) {
-                        convertedLoopState.thisName = convertedOuterLoopState.thisName;
-                    }
-                    if (convertedOuterLoopState.hoistedLocalVariables) {
-                        convertedLoopState.hoistedLocalVariables = convertedOuterLoopState.hoistedLocalVariables;
-                    }
-                }
-                write(" {");
-                writeLine();
-                increaseIndent();
-                if (bodyIsBlock) {
-                    emitLines(node.statement.statements);
-                }
-                else {
-                    emit(node.statement);
-                }
-                writeLine();
-                copyLoopOutParameters(convertedLoopState, 1, true);
-                decreaseIndent();
-                writeLine();
-                write("};");
-                writeLine();
-                if (loopOutParameters) {
-                    write("var ");
-                    for (var i = 0; i < loopOutParameters.length; i++) {
-                        if (i !== 0) {
-                            write(", ");
-                        }
-                        write(loopOutParameters[i].outParamName);
-                    }
-                    write(";");
-                    writeLine();
-                }
-                if (convertedLoopState.argumentsName) {
-                    if (convertedOuterLoopState) {
-                        convertedOuterLoopState.argumentsName = convertedLoopState.argumentsName;
-                    }
-                    else {
-                        write("var " + convertedLoopState.argumentsName + " = arguments;");
-                        writeLine();
-                    }
-                }
-                if (convertedLoopState.thisName) {
-                    if (convertedOuterLoopState) {
-                        convertedOuterLoopState.thisName = convertedLoopState.thisName;
-                    }
-                    else {
-                        write("var " + convertedLoopState.thisName + " = this;");
-                        writeLine();
-                    }
-                }
-                if (convertedLoopState.hoistedLocalVariables) {
-                    if (convertedOuterLoopState) {
-                        convertedOuterLoopState.hoistedLocalVariables = convertedLoopState.hoistedLocalVariables;
-                    }
-                    else {
-                        write("var ");
-                        var seen = void 0;
-                        for (var _c = 0, _d = convertedLoopState.hoistedLocalVariables; _c < _d.length; _c++) {
-                            var id = _d[_c];
-                            if (!seen) {
-                                seen = {};
-                            }
-                            else {
-                                write(", ");
-                            }
-                            if (!ts.hasProperty(seen, id.text)) {
-                                emit(id);
-                                seen[id.text] = id.text;
-                            }
-                        }
-                        write(";");
-                        writeLine();
-                    }
-                }
-                var currentLoopState = convertedLoopState;
-                convertedLoopState = convertedOuterLoopState;
-                return { functionName: functionName, paramList: paramList, state: currentLoopState };
-                function processVariableDeclaration(name) {
-                    if (name.kind === 69) {
-                        var nameText = isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(name)
-                            ? getGeneratedNameForNode(name)
-                            : name.text;
-                        loopParameters.push(nameText);
-                        if (resolver.getNodeCheckFlags(name.parent) & 2097152) {
-                            var reassignedVariable = { originalName: name, outParamName: makeUniqueName("out_" + nameText) };
-                            (loopOutParameters || (loopOutParameters = [])).push(reassignedVariable);
-                        }
-                    }
-                    else {
-                        for (var _a = 0, _b = name.elements; _a < _b.length; _a++) {
-                            var element = _b[_a];
-                            processVariableDeclaration(element.name);
-                        }
-                    }
-                }
-            }
-            function emitNormalLoopBody(node, emitAsEmbeddedStatement) {
-                var saveAllowedNonLabeledJumps;
-                if (convertedLoopState) {
-                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-                    convertedLoopState.allowedNonLabeledJumps = 2 | 4;
-                }
-                if (emitAsEmbeddedStatement) {
-                    emitEmbeddedStatement(node.statement);
-                }
-                else if (node.statement.kind === 199) {
-                    emitLines(node.statement.statements);
-                }
-                else {
-                    writeLine();
-                    emit(node.statement);
-                }
-                if (convertedLoopState) {
-                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
-                }
-            }
-            function copyLoopOutParameters(state, copyDirection, emitAsStatements) {
-                if (state.loopOutParameters) {
-                    for (var _a = 0, _b = state.loopOutParameters; _a < _b.length; _a++) {
-                        var outParam = _b[_a];
-                        if (copyDirection === 0) {
-                            emitIdentifier(outParam.originalName);
-                            write(" = " + outParam.outParamName);
-                        }
-                        else {
-                            write(outParam.outParamName + " = ");
-                            emitIdentifier(outParam.originalName);
-                        }
-                        if (emitAsStatements) {
-                            write(";");
-                            writeLine();
-                        }
-                        else {
-                            write(", ");
-                        }
-                    }
-                }
-            }
-            function emitConvertedLoopCall(loop, emitAsBlock) {
-                if (emitAsBlock) {
-                    write(" {");
-                    writeLine();
-                    increaseIndent();
-                }
-                var isSimpleLoop = !(loop.state.nonLocalJumps & ~4) &&
-                    !loop.state.labeledNonLocalBreaks &&
-                    !loop.state.labeledNonLocalContinues;
-                var loopResult = makeUniqueName("state");
-                if (!isSimpleLoop) {
-                    write("var " + loopResult + " = ");
-                }
-                write(loop.functionName + "(" + loop.paramList + ");");
-                writeLine();
-                copyLoopOutParameters(loop.state, 0, true);
-                if (!isSimpleLoop) {
-                    writeLine();
-                    if (loop.state.nonLocalJumps & 8) {
-                        write("if (typeof " + loopResult + " === \"object\") ");
-                        if (convertedLoopState) {
-                            write("return " + loopResult + ";");
-                            convertedLoopState.nonLocalJumps |= 8;
-                        }
-                        else {
-                            write("return " + loopResult + ".value;");
-                        }
-                        writeLine();
-                    }
-                    if (loop.state.nonLocalJumps & 2) {
-                        write("if (" + loopResult + " === \"break\") break;");
-                        writeLine();
-                    }
-                    emitDispatchTableForLabeledJumps(loopResult, loop.state, convertedLoopState);
-                }
-                if (emitAsBlock) {
-                    writeLine();
-                    decreaseIndent();
-                    write("}");
-                }
-                function emitDispatchTableForLabeledJumps(loopResultVariable, currentLoop, outerLoop) {
-                    if (!currentLoop.labeledNonLocalBreaks && !currentLoop.labeledNonLocalContinues) {
-                        return;
-                    }
-                    write("switch(" + loopResultVariable + ") {");
-                    increaseIndent();
-                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalBreaks, true, loopResultVariable, outerLoop);
-                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalContinues, false, loopResultVariable, outerLoop);
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-                function emitDispatchEntriesForLabeledJumps(table, isBreak, loopResultVariable, outerLoop) {
-                    if (!table) {
-                        return;
-                    }
-                    for (var labelText in table) {
-                        var labelMarker = table[labelText];
-                        writeLine();
-                        write("case \"" + labelMarker + "\": ");
-                        if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) {
-                            if (isBreak) {
-                                write("break ");
-                            }
-                            else {
-                                write("continue ");
-                            }
-                            write(labelText + ";");
-                        }
-                        else {
-                            setLabeledJump(outerLoop, isBreak, labelText, labelMarker);
-                            write("return " + loopResultVariable + ";");
-                        }
-                    }
-                }
-            }
-            function emitForStatement(node) {
-                emitLoop(node, emitForStatementWorker);
-            }
-            function emitForStatementWorker(node, loop) {
-                var endPos = emitToken(86, node.pos);
-                write(" ");
-                endPos = emitToken(17, endPos);
-                if (node.initializer && node.initializer.kind === 219) {
-                    var variableDeclarationList = node.initializer;
-                    var startIsEmitted = tryEmitStartOfVariableDeclarationList(variableDeclarationList);
-                    if (startIsEmitted) {
-                        emitCommaList(variableDeclarationList.declarations);
-                    }
-                    else {
-                        emitVariableDeclarationListSkippingUninitializedEntries(variableDeclarationList);
-                    }
-                }
-                else if (node.initializer) {
-                    emit(node.initializer);
-                }
-                write(";");
-                emitOptional(" ", node.condition);
-                write(";");
-                emitOptional(" ", node.incrementor);
-                write(")");
-                if (loop) {
-                    emitConvertedLoopCall(loop, true);
-                }
-                else {
-                    emitNormalLoopBody(node, true);
-                }
-            }
-            function emitForInOrForOfStatement(node) {
-                if (languageVersion < 2 && node.kind === 208) {
-                    emitLoop(node, emitDownLevelForOfStatementWorker);
-                }
-                else {
-                    emitLoop(node, emitForInOrForOfStatementWorker);
-                }
-            }
-            function emitForInOrForOfStatementWorker(node, loop) {
-                var endPos = emitToken(86, node.pos);
-                write(" ");
-                endPos = emitToken(17, endPos);
-                if (node.initializer.kind === 219) {
-                    var variableDeclarationList = node.initializer;
-                    if (variableDeclarationList.declarations.length >= 1) {
-                        tryEmitStartOfVariableDeclarationList(variableDeclarationList);
-                        emit(variableDeclarationList.declarations[0]);
-                    }
-                }
-                else {
-                    emit(node.initializer);
-                }
-                if (node.kind === 207) {
-                    write(" in ");
-                }
-                else {
-                    write(" of ");
-                }
-                emit(node.expression);
-                emitToken(18, node.expression.end);
-                if (loop) {
-                    emitConvertedLoopCall(loop, true);
-                }
-                else {
-                    emitNormalLoopBody(node, true);
-                }
-            }
-            function emitDownLevelForOfStatementWorker(node, loop) {
-                var endPos = emitToken(86, node.pos);
-                write(" ");
-                endPos = emitToken(17, endPos);
-                var counter = createTempVariable(268435456);
-                var rhsReference = ts.createSynthesizedNode(69);
-                rhsReference.text = node.expression.kind === 69 ?
-                    makeUniqueName(node.expression.text) :
-                    makeTempVariableName(0);
-                emitStart(node.expression);
-                write("var ");
-                emitNodeWithoutSourceMap(counter);
-                write(" = 0");
-                emitEnd(node.expression);
-                write(", ");
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(rhsReference);
-                write(" = ");
-                emitNodeWithoutSourceMap(node.expression);
-                emitEnd(node.expression);
-                write("; ");
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(counter);
-                write(" < ");
-                emitNodeWithCommentsAndWithoutSourcemap(rhsReference);
-                write(".length");
-                emitEnd(node.expression);
-                write("; ");
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(counter);
-                write("++");
-                emitEnd(node.expression);
-                emitToken(18, node.expression.end);
-                write(" {");
-                writeLine();
-                increaseIndent();
-                var rhsIterationValue = createElementAccessExpression(rhsReference, counter);
-                emitStart(node.initializer);
-                if (node.initializer.kind === 219) {
-                    write("var ");
-                    var variableDeclarationList = node.initializer;
-                    if (variableDeclarationList.declarations.length > 0) {
-                        var declaration = variableDeclarationList.declarations[0];
-                        if (ts.isBindingPattern(declaration.name)) {
-                            emitDestructuring(declaration, false, rhsIterationValue);
-                        }
-                        else {
-                            emitNodeWithCommentsAndWithoutSourcemap(declaration);
-                            write(" = ");
-                            emitNodeWithoutSourceMap(rhsIterationValue);
-                        }
-                    }
-                    else {
-                        emitNodeWithoutSourceMap(createTempVariable(0));
-                        write(" = ");
-                        emitNodeWithoutSourceMap(rhsIterationValue);
-                    }
-                }
-                else {
-                    var assignmentExpression = createBinaryExpression(node.initializer, 56, rhsIterationValue, false);
-                    if (node.initializer.kind === 170 || node.initializer.kind === 171) {
-                        emitDestructuring(assignmentExpression, true, undefined);
-                    }
-                    else {
-                        emitNodeWithCommentsAndWithoutSourcemap(assignmentExpression);
-                    }
-                }
-                emitEnd(node.initializer);
-                write(";");
-                if (loop) {
-                    writeLine();
-                    emitConvertedLoopCall(loop, false);
-                }
-                else {
-                    emitNormalLoopBody(node, false);
-                }
-                writeLine();
-                decreaseIndent();
-                write("}");
-            }
-            function emitBreakOrContinueStatement(node) {
-                if (convertedLoopState) {
-                    var jump = node.kind === 210 ? 2 : 4;
-                    var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) ||
-                        (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
-                    if (!canUseBreakOrContinue) {
-                        write("return ");
-                        copyLoopOutParameters(convertedLoopState, 1, false);
-                        if (!node.label) {
-                            if (node.kind === 210) {
-                                convertedLoopState.nonLocalJumps |= 2;
-                                write("\"break\";");
-                            }
-                            else {
-                                convertedLoopState.nonLocalJumps |= 4;
-                                write("\"continue\";");
-                            }
-                        }
-                        else {
-                            var labelMarker = void 0;
-                            if (node.kind === 210) {
-                                labelMarker = "break-" + node.label.text;
-                                setLabeledJump(convertedLoopState, true, node.label.text, labelMarker);
-                            }
-                            else {
-                                labelMarker = "continue-" + node.label.text;
-                                setLabeledJump(convertedLoopState, false, node.label.text, labelMarker);
-                            }
-                            write("\"" + labelMarker + "\";");
-                        }
-                        return;
-                    }
-                }
-                emitToken(node.kind === 210 ? 70 : 75, node.pos);
-                emitOptional(" ", node.label);
-                write(";");
-            }
-            function emitReturnStatement(node) {
-                if (convertedLoopState) {
-                    convertedLoopState.nonLocalJumps |= 8;
-                    write("return { value: ");
-                    if (node.expression) {
-                        emit(node.expression);
-                    }
-                    else {
-                        write("void 0");
-                    }
-                    write(" };");
-                    return;
-                }
-                emitToken(94, node.pos);
-                emitOptional(" ", node.expression);
-                write(";");
-            }
-            function emitWithStatement(node) {
-                write("with (");
-                emit(node.expression);
-                write(")");
-                emitEmbeddedStatement(node.statement);
-            }
-            function emitSwitchStatement(node) {
-                var endPos = emitToken(96, node.pos);
-                write(" ");
-                emitToken(17, endPos);
-                emit(node.expression);
-                endPos = emitToken(18, node.expression.end);
-                write(" ");
-                var saveAllowedNonLabeledJumps;
-                if (convertedLoopState) {
-                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-                    convertedLoopState.allowedNonLabeledJumps |= 2;
-                }
-                emitCaseBlock(node.caseBlock, endPos);
-                if (convertedLoopState) {
-                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
-                }
-            }
-            function emitCaseBlock(node, startPos) {
-                emitToken(15, startPos);
-                increaseIndent();
-                emitLines(node.clauses);
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.clauses.end);
-            }
-            function nodeStartPositionsAreOnSameLine(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node1.pos)) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
-            }
-            function nodeEndPositionsAreOnSameLine(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, node2.end);
-            }
-            function nodeEndIsOnSameLineAsNodeStart(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
-            }
-            function emitCaseOrDefaultClause(node) {
-                if (node.kind === 249) {
-                    write("case ");
-                    emit(node.expression);
-                    write(":");
-                }
-                else {
-                    write("default:");
-                }
-                if (node.statements.length === 1 && nodeStartPositionsAreOnSameLine(node, node.statements[0])) {
-                    write(" ");
-                    emit(node.statements[0]);
-                }
-                else {
-                    increaseIndent();
-                    emitLines(node.statements);
-                    decreaseIndent();
-                }
-            }
-            function emitThrowStatement(node) {
-                write("throw ");
-                emit(node.expression);
-                write(";");
-            }
-            function emitTryStatement(node) {
-                write("try ");
-                emit(node.tryBlock);
-                emit(node.catchClause);
-                if (node.finallyBlock) {
-                    writeLine();
-                    write("finally ");
-                    emit(node.finallyBlock);
-                }
-            }
-            function emitCatchClause(node) {
-                writeLine();
-                var endPos = emitToken(72, node.pos);
-                write(" ");
-                emitToken(17, endPos);
-                emit(node.variableDeclaration);
-                emitToken(18, node.variableDeclaration ? node.variableDeclaration.end : endPos);
-                write(" ");
-                emitBlock(node.block);
-            }
-            function emitDebuggerStatement(node) {
-                emitToken(76, node.pos);
-                write(";");
-            }
-            function emitLabelAndColon(node) {
-                emit(node.label);
-                write(": ");
-            }
-            function emitLabeledStatement(node) {
-                if (!ts.isIterationStatement(node.statement, false) || !shouldConvertLoopBody(node.statement)) {
-                    emitLabelAndColon(node);
-                }
-                if (convertedLoopState) {
-                    if (!convertedLoopState.labels) {
-                        convertedLoopState.labels = {};
-                    }
-                    convertedLoopState.labels[node.label.text] = node.label.text;
-                }
-                emit(node.statement);
-                if (convertedLoopState) {
-                    convertedLoopState.labels[node.label.text] = undefined;
-                }
-            }
-            function getContainingModule(node) {
-                do {
-                    node = node.parent;
-                } while (node && node.kind !== 225);
-                return node;
-            }
-            function emitContainingModuleName(node) {
-                var container = getContainingModule(node);
-                write(container ? getGeneratedNameForNode(container) : "exports");
-            }
-            function emitModuleMemberName(node) {
-                emitStart(node.name);
-                if (ts.getCombinedNodeFlags(node) & 1) {
-                    var container = getContainingModule(node);
-                    if (container) {
-                        write(getGeneratedNameForNode(container));
-                        write(".");
-                    }
-                    else if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
-                        write("exports.");
-                    }
-                }
-                emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                emitEnd(node.name);
-            }
-            function createVoidZero() {
-                var zero = ts.createSynthesizedNode(8);
-                zero.text = "0";
-                var result = ts.createSynthesizedNode(183);
-                result.expression = zero;
-                return result;
-            }
-            function emitEs6ExportDefaultCompat(node) {
-                if (node.parent.kind === 256) {
-                    ts.Debug.assert(!!(node.flags & 512) || node.kind === 235);
-                    if (modulekind === ts.ModuleKind.CommonJS || modulekind === ts.ModuleKind.AMD || modulekind === ts.ModuleKind.UMD) {
-                        if (!isEs6Module) {
-                            if (languageVersion !== 0) {
-                                write('Object.defineProperty(exports, "__esModule", { value: true });');
-                                writeLine();
-                            }
-                            else {
-                                write("exports.__esModule = true;");
-                                writeLine();
-                            }
-                        }
-                    }
-                }
-            }
-            function emitExportMemberAssignment(node) {
-                if (node.flags & 1) {
-                    writeLine();
-                    emitStart(node);
-                    if (modulekind === ts.ModuleKind.System && node.parent === currentSourceFile) {
-                        write(exportFunctionForFile + "(\"");
-                        if (node.flags & 512) {
-                            write("default");
-                        }
-                        else {
-                            emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                        }
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(")");
-                    }
-                    else {
-                        if (node.flags & 512) {
-                            emitEs6ExportDefaultCompat(node);
-                            if (languageVersion === 0) {
-                                write('exports["default"]');
-                            }
-                            else {
-                                write("exports.default");
-                            }
-                        }
-                        else {
-                            emitModuleMemberName(node);
-                        }
-                        write(" = ");
-                        emitDeclarationName(node);
-                    }
-                    emitEnd(node);
-                    write(";");
-                }
-            }
-            function emitExportMemberAssignments(name) {
-                if (modulekind === ts.ModuleKind.System) {
-                    return;
-                }
-                if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
-                    for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
-                        var specifier = _b[_a];
-                        writeLine();
-                        emitStart(specifier.name);
-                        emitContainingModuleName(specifier);
-                        write(".");
-                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                        emitEnd(specifier.name);
-                        write(" = ");
-                        emitExpressionIdentifier(name);
-                        write(";");
-                    }
-                }
-            }
-            function emitExportSpecifierInSystemModule(specifier) {
-                ts.Debug.assert(modulekind === ts.ModuleKind.System);
-                if (!resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name) && !resolver.isValueAliasDeclaration(specifier)) {
-                    return;
-                }
-                writeLine();
-                emitStart(specifier.name);
-                write(exportFunctionForFile + "(\"");
-                emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                write("\", ");
-                emitExpressionIdentifier(specifier.propertyName || specifier.name);
-                write(")");
-                emitEnd(specifier.name);
-                write(";");
-            }
-            function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) {
-                if (shouldEmitCommaBeforeAssignment) {
-                    write(", ");
-                }
-                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name);
-                if (exportChanged) {
-                    write(exportFunctionForFile + "(\"");
-                    emitNodeWithCommentsAndWithoutSourcemap(name);
-                    write("\", ");
-                }
-                var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 || name.parent.kind === 169);
-                emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap);
-                withTemporaryNoSourceMap(function () {
-                    if (isVariableDeclarationOrBindingElement) {
-                        emitModuleMemberName(name.parent);
-                    }
-                    else {
-                        emit(name);
-                    }
-                    write(" = ");
-                    emit(value);
-                });
-                emitEnd(nodeForSourceMap, true);
-                if (exportChanged) {
-                    write(")");
-                }
-            }
-            function emitTempVariableAssignment(expression, canDefineTempVariablesInPlace, shouldEmitCommaBeforeAssignment, sourceMapNode) {
-                var identifier = createTempVariable(0);
-                if (!canDefineTempVariablesInPlace) {
-                    recordTempDeclaration(identifier);
-                }
-                emitAssignment(identifier, expression, shouldEmitCommaBeforeAssignment, sourceMapNode || expression.parent);
-                return identifier;
-            }
-            function isFirstVariableDeclaration(root) {
-                return root.kind === 218 &&
-                    root.parent.kind === 219 &&
-                    root.parent.declarations[0] === root;
-            }
-            function emitDestructuring(root, isAssignmentExpressionStatement, value) {
-                var emitCount = 0;
-                var canDefineTempVariablesInPlace = false;
-                if (root.kind === 218) {
-                    var isExported = ts.getCombinedNodeFlags(root) & 1;
-                    var isSourceLevelForSystemModuleKind = shouldHoistDeclarationInSystemJsModule(root);
-                    canDefineTempVariablesInPlace = !isExported && !isSourceLevelForSystemModuleKind;
-                }
-                else if (root.kind === 142) {
-                    canDefineTempVariablesInPlace = true;
-                }
-                if (root.kind === 187) {
-                    emitAssignmentExpression(root);
-                }
-                else {
-                    ts.Debug.assert(!isAssignmentExpressionStatement);
-                    if (isFirstVariableDeclaration(root)) {
-                        sourceMap.changeEmitSourcePos();
-                    }
-                    emitBindingElement(root, value);
-                }
-                function ensureIdentifier(expr, reuseIdentifierExpressions, sourceMapNode) {
-                    if (expr.kind === 69 && reuseIdentifierExpressions) {
-                        return expr;
-                    }
-                    var identifier = emitTempVariableAssignment(expr, canDefineTempVariablesInPlace, emitCount > 0, sourceMapNode);
-                    emitCount++;
-                    return identifier;
-                }
-                function createDefaultValueCheck(value, defaultValue, sourceMapNode) {
-                    value = ensureIdentifier(value, true, sourceMapNode);
-                    var equals = ts.createSynthesizedNode(187);
-                    equals.left = value;
-                    equals.operatorToken = ts.createSynthesizedNode(32);
-                    equals.right = createVoidZero();
-                    return createConditionalExpression(equals, defaultValue, value);
-                }
-                function createConditionalExpression(condition, whenTrue, whenFalse) {
-                    var cond = ts.createSynthesizedNode(188);
-                    cond.condition = condition;
-                    cond.questionToken = ts.createSynthesizedNode(53);
-                    cond.whenTrue = whenTrue;
-                    cond.colonToken = ts.createSynthesizedNode(54);
-                    cond.whenFalse = whenFalse;
-                    return cond;
-                }
-                function createNumericLiteral(value) {
-                    var node = ts.createSynthesizedNode(8);
-                    node.text = "" + value;
-                    return node;
-                }
-                function createPropertyAccessForDestructuringProperty(object, propName) {
-                    var index;
-                    var nameIsComputed = propName.kind === 140;
-                    if (nameIsComputed) {
-                        index = ensureIdentifier(propName.expression, false, propName);
-                    }
-                    else {
-                        index = ts.createSynthesizedNode(propName.kind);
-                        index.text = ts.unescapeIdentifier(propName.text);
-                    }
-                    return !nameIsComputed && index.kind === 69
-                        ? createPropertyAccessExpression(object, index)
-                        : createElementAccessExpression(object, index);
-                }
-                function createSliceCall(value, sliceIndex) {
-                    var call = ts.createSynthesizedNode(174);
-                    var sliceIdentifier = ts.createSynthesizedNode(69);
-                    sliceIdentifier.text = "slice";
-                    call.expression = createPropertyAccessExpression(value, sliceIdentifier);
-                    call.arguments = ts.createSynthesizedNodeArray();
-                    call.arguments[0] = createNumericLiteral(sliceIndex);
-                    return call;
-                }
-                function emitObjectLiteralAssignment(target, value, sourceMapNode) {
-                    var properties = target.properties;
-                    if (properties.length !== 1) {
-                        value = ensureIdentifier(value, true, sourceMapNode);
-                    }
-                    for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) {
-                        var p = properties_5[_a];
-                        if (p.kind === 253 || p.kind === 254) {
-                            var propName = p.name;
-                            var target_1 = p.kind === 254 ? p : p.initializer || propName;
-                            emitDestructuringAssignment(target_1, createPropertyAccessForDestructuringProperty(value, propName), p);
-                        }
-                    }
-                }
-                function emitArrayLiteralAssignment(target, value, sourceMapNode) {
-                    var elements = target.elements;
-                    if (elements.length !== 1) {
-                        value = ensureIdentifier(value, true, sourceMapNode);
-                    }
-                    for (var i = 0; i < elements.length; i++) {
-                        var e = elements[i];
-                        if (e.kind !== 193) {
-                            if (e.kind !== 191) {
-                                emitDestructuringAssignment(e, createElementAccessExpression(value, createNumericLiteral(i)), e);
-                            }
-                            else if (i === elements.length - 1) {
-                                emitDestructuringAssignment(e.expression, createSliceCall(value, i), e);
-                            }
-                        }
-                    }
-                }
-                function emitDestructuringAssignment(target, value, sourceMapNode) {
-                    if (target.kind === 254) {
-                        if (target.objectAssignmentInitializer) {
-                            value = createDefaultValueCheck(value, target.objectAssignmentInitializer, sourceMapNode);
-                        }
-                        target = target.name;
-                    }
-                    else if (target.kind === 187 && target.operatorToken.kind === 56) {
-                        value = createDefaultValueCheck(value, target.right, sourceMapNode);
-                        target = target.left;
-                    }
-                    if (target.kind === 171) {
-                        emitObjectLiteralAssignment(target, value, sourceMapNode);
-                    }
-                    else if (target.kind === 170) {
-                        emitArrayLiteralAssignment(target, value, sourceMapNode);
-                    }
-                    else {
-                        emitAssignment(target, value, emitCount > 0, sourceMapNode);
-                        emitCount++;
-                    }
-                }
-                function emitAssignmentExpression(root) {
-                    var target = root.left;
-                    var value = root.right;
-                    if (ts.isEmptyObjectLiteralOrArrayLiteral(target)) {
-                        emit(value);
-                    }
-                    else if (isAssignmentExpressionStatement) {
-                        emitDestructuringAssignment(target, value, ts.nodeIsSynthesized(root) ? target : root);
-                    }
-                    else {
-                        if (root.parent.kind !== 178) {
-                            write("(");
-                        }
-                        value = ensureIdentifier(value, true, root);
-                        emitDestructuringAssignment(target, value, root);
-                        write(", ");
-                        emit(value);
-                        if (root.parent.kind !== 178) {
-                            write(")");
-                        }
-                    }
-                }
-                function emitBindingElement(target, value) {
-                    if (target.initializer) {
-                        value = value ? createDefaultValueCheck(value, target.initializer, target) : target.initializer;
-                    }
-                    else if (!value) {
-                        value = createVoidZero();
-                    }
-                    if (ts.isBindingPattern(target.name)) {
-                        var pattern = target.name;
-                        var elements = pattern.elements;
-                        var numElements = elements.length;
-                        if (numElements !== 1) {
-                            value = ensureIdentifier(value, numElements !== 0, target);
-                        }
-                        for (var i = 0; i < numElements; i++) {
-                            var element = elements[i];
-                            if (pattern.kind === 167) {
-                                var propName = element.propertyName || element.name;
-                                emitBindingElement(element, createPropertyAccessForDestructuringProperty(value, propName));
-                            }
-                            else if (element.kind !== 193) {
-                                if (!element.dotDotDotToken) {
-                                    emitBindingElement(element, createElementAccessExpression(value, createNumericLiteral(i)));
-                                }
-                                else if (i === numElements - 1) {
-                                    emitBindingElement(element, createSliceCall(value, i));
-                                }
-                            }
-                        }
-                    }
-                    else {
-                        emitAssignment(target.name, value, emitCount > 0, target);
-                        emitCount++;
-                    }
-                }
-            }
-            function emitVariableDeclaration(node) {
-                if (ts.isBindingPattern(node.name)) {
-                    var isExported = ts.getCombinedNodeFlags(node) & 1;
-                    if (languageVersion >= 2 && (!isExported || modulekind === ts.ModuleKind.ES6)) {
-                        var isTopLevelDeclarationInSystemModule = modulekind === ts.ModuleKind.System &&
-                            shouldHoistVariable(node, true);
-                        if (isTopLevelDeclarationInSystemModule) {
-                            write("(");
-                        }
-                        emit(node.name);
-                        emitOptional(" = ", node.initializer);
-                        if (isTopLevelDeclarationInSystemModule) {
-                            write(")");
-                        }
-                    }
-                    else {
-                        emitDestructuring(node, false);
-                    }
-                }
-                else {
-                    var initializer = node.initializer;
-                    if (!initializer &&
-                        languageVersion < 2 &&
-                        node.name.kind === 69) {
-                        var container = ts.getEnclosingBlockScopeContainer(node);
-                        var flags = resolver.getNodeCheckFlags(node);
-                        var isCapturedInFunction = flags & 131072;
-                        var isDeclaredInLoop = flags & 262144;
-                        var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(container) ||
-                            (isCapturedInFunction && isDeclaredInLoop && container.kind === 199 && ts.isIterationStatement(container.parent, false));
-                        var emittedAsNestedLetDeclaration = ts.getCombinedNodeFlags(node) & 1024 &&
-                            !emittedAsTopLevel;
-                        var emitExplicitInitializer = emittedAsNestedLetDeclaration &&
-                            container.kind !== 207 &&
-                            container.kind !== 208 &&
-                            (!resolver.isDeclarationWithCollidingName(node) ||
-                                (isDeclaredInLoop && !isCapturedInFunction && !ts.isIterationStatement(container, false)));
-                        if (emitExplicitInitializer) {
-                            initializer = createVoidZero();
-                        }
-                    }
-                    var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.name);
-                    if (exportChanged) {
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                        write("\", ");
-                    }
-                    emitModuleMemberName(node);
-                    emitOptional(" = ", initializer);
-                    if (exportChanged) {
-                        write(")");
-                    }
-                }
-            }
-            function emitExportVariableAssignments(node) {
-                if (node.kind === 193) {
-                    return;
-                }
-                var name = node.name;
-                if (name.kind === 69) {
-                    emitExportMemberAssignments(name);
-                }
-                else if (ts.isBindingPattern(name)) {
-                    ts.forEach(name.elements, emitExportVariableAssignments);
-                }
-            }
-            function isES6ExportedDeclaration(node) {
-                return !!(node.flags & 1) &&
-                    modulekind === ts.ModuleKind.ES6 &&
-                    node.parent.kind === 256;
-            }
-            function emitVariableStatement(node) {
-                var startIsEmitted = false;
-                if (node.flags & 1) {
-                    if (isES6ExportedDeclaration(node)) {
-                        write("export ");
-                        startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
-                    }
-                }
-                else {
-                    startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
-                }
-                if (startIsEmitted) {
-                    emitCommaList(node.declarationList.declarations);
-                    write(";");
-                }
-                else {
-                    var atLeastOneItem = emitVariableDeclarationListSkippingUninitializedEntries(node.declarationList);
-                    if (atLeastOneItem) {
-                        write(";");
-                    }
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
-                    ts.forEach(node.declarationList.declarations, emitExportVariableAssignments);
-                }
-            }
-            function shouldEmitLeadingAndTrailingCommentsForVariableStatement(node) {
-                if (!(node.flags & 1)) {
-                    return true;
-                }
-                if (isES6ExportedDeclaration(node)) {
-                    return true;
-                }
-                for (var _a = 0, _b = node.declarationList.declarations; _a < _b.length; _a++) {
-                    var declaration = _b[_a];
-                    if (declaration.initializer) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function emitParameter(node) {
-                if (languageVersion < 2) {
-                    if (ts.isBindingPattern(node.name)) {
-                        var name_28 = createTempVariable(0);
-                        if (!tempParameters) {
-                            tempParameters = [];
-                        }
-                        tempParameters.push(name_28);
-                        emit(name_28);
-                    }
-                    else {
-                        emit(node.name);
-                    }
-                }
-                else {
-                    if (node.dotDotDotToken) {
-                        write("...");
-                    }
-                    emit(node.name);
-                    emitOptional(" = ", node.initializer);
-                }
-            }
-            function emitDefaultValueAssignments(node) {
-                if (languageVersion < 2) {
-                    var tempIndex_1 = 0;
-                    ts.forEach(node.parameters, function (parameter) {
-                        if (parameter.dotDotDotToken) {
-                            return;
-                        }
-                        var paramName = parameter.name, initializer = parameter.initializer;
-                        if (ts.isBindingPattern(paramName)) {
-                            var hasBindingElements = paramName.elements.length > 0;
-                            if (hasBindingElements || initializer) {
-                                writeLine();
-                                write("var ");
-                                if (hasBindingElements) {
-                                    emitDestructuring(parameter, false, tempParameters[tempIndex_1]);
-                                }
-                                else {
-                                    emit(tempParameters[tempIndex_1]);
-                                    write(" = ");
-                                    emit(initializer);
-                                }
-                                write(";");
-                                tempIndex_1++;
-                            }
-                        }
-                        else if (initializer) {
-                            writeLine();
-                            emitStart(parameter);
-                            write("if (");
-                            emitNodeWithoutSourceMap(paramName);
-                            write(" === void 0)");
-                            emitEnd(parameter);
-                            write(" { ");
-                            emitStart(parameter);
-                            emitNodeWithCommentsAndWithoutSourcemap(paramName);
-                            write(" = ");
-                            emitNodeWithCommentsAndWithoutSourcemap(initializer);
-                            emitEnd(parameter);
-                            write("; }");
-                        }
-                    });
-                }
-            }
-            function emitRestParameter(node) {
-                if (languageVersion < 2 && ts.hasDeclaredRestParameter(node)) {
-                    var restIndex = node.parameters.length - 1;
-                    var restParam = node.parameters[restIndex];
-                    if (ts.isBindingPattern(restParam.name)) {
-                        return;
-                    }
-                    var tempName = createTempVariable(268435456).text;
-                    writeLine();
-                    emitLeadingComments(restParam);
-                    emitStart(restParam);
-                    write("var ");
-                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
-                    write(" = [];");
-                    emitEnd(restParam);
-                    emitTrailingComments(restParam);
-                    writeLine();
-                    write("for (");
-                    emitStart(restParam);
-                    write("var " + tempName + " = " + restIndex + ";");
-                    emitEnd(restParam);
-                    write(" ");
-                    emitStart(restParam);
-                    write(tempName + " < arguments.length;");
-                    emitEnd(restParam);
-                    write(" ");
-                    emitStart(restParam);
-                    write(tempName + "++");
-                    emitEnd(restParam);
-                    write(") {");
-                    increaseIndent();
-                    writeLine();
-                    emitStart(restParam);
-                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
-                    write("[" + tempName + " - " + restIndex + "] = arguments[" + tempName + "];");
-                    emitEnd(restParam);
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function emitAccessor(node) {
-                write(node.kind === 149 ? "get " : "set ");
-                emit(node.name);
-                emitSignatureAndBody(node);
-            }
-            function shouldEmitAsArrowFunction(node) {
-                return node.kind === 180 && languageVersion >= 2;
-            }
-            function emitDeclarationName(node) {
-                if (node.name) {
-                    emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                }
-                else {
-                    write(getGeneratedNameForNode(node));
-                }
-            }
-            function shouldEmitFunctionName(node) {
-                if (node.kind === 179) {
-                    return !!node.name;
-                }
-                if (node.kind === 220) {
-                    return !!node.name || modulekind !== ts.ModuleKind.ES6;
-                }
-            }
-            function emitFunctionDeclaration(node) {
-                if (ts.nodeIsMissing(node.body)) {
-                    return emitCommentsOnNotEmittedNode(node);
-                }
-                var kind = node.kind, parent = node.parent;
-                if (kind !== 147 &&
-                    kind !== 146 &&
-                    parent &&
-                    parent.kind !== 253 &&
-                    parent.kind !== 174 &&
-                    parent.kind !== 170) {
-                    emitLeadingComments(node);
-                }
-                emitStart(node);
-                if (!shouldEmitAsArrowFunction(node)) {
-                    if (isES6ExportedDeclaration(node)) {
-                        write("export ");
-                        if (node.flags & 512) {
-                            write("default ");
-                        }
-                    }
-                    write("function");
-                    if (languageVersion >= 2 && node.asteriskToken) {
-                        write("*");
-                    }
-                    write(" ");
-                }
-                if (shouldEmitFunctionName(node)) {
-                    emitDeclarationName(node);
-                }
-                emitSignatureAndBody(node);
-                if (modulekind !== ts.ModuleKind.ES6 && kind === 220 && parent === currentSourceFile && node.name) {
-                    emitExportMemberAssignments(node.name);
-                }
-                emitEnd(node);
-                if (kind !== 147 &&
-                    kind !== 146 &&
-                    kind !== 180) {
-                    emitTrailingComments(node);
-                }
-            }
-            function emitCaptureThisForNodeIfNecessary(node) {
-                if (resolver.getNodeCheckFlags(node) & 4) {
-                    writeLine();
-                    emitStart(node);
-                    write("var _this = this;");
-                    emitEnd(node);
-                }
-            }
-            function emitSignatureParameters(node) {
-                increaseIndent();
-                write("(");
-                if (node) {
-                    var parameters = node.parameters;
-                    var skipCount = node.parameters.length && node.parameters[0].name.text === "this" ? 1 : 0;
-                    var omitCount = languageVersion < 2 && ts.hasDeclaredRestParameter(node) ? 1 : 0;
-                    emitList(parameters, skipCount, parameters.length - omitCount - skipCount, false, false);
-                }
-                write(")");
-                decreaseIndent();
-            }
-            function emitSignatureParametersForArrow(node) {
-                if (node.parameters.length === 1 && node.pos === node.parameters[0].pos) {
-                    emit(node.parameters[0]);
-                    return;
-                }
-                emitSignatureParameters(node);
-            }
-            function emitAsyncFunctionBodyForES6(node) {
-                var promiseConstructor = ts.getEntityNameFromTypeNode(node.type);
-                var isArrowFunction = node.kind === 180;
-                var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192) !== 0;
-                if (!isArrowFunction) {
-                    write(" {");
-                    increaseIndent();
-                    writeLine();
-                    if (resolver.getNodeCheckFlags(node) & 4096) {
-                        writeLines("\nconst _super = (function (geti, seti) {\n    const cache = Object.create(null);\n    return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);");
-                        writeLine();
-                    }
-                    else if (resolver.getNodeCheckFlags(node) & 2048) {
-                        write("const _super = name => super[name];");
-                        writeLine();
-                    }
-                    write("return");
-                }
-                write(" __awaiter(this");
-                if (hasLexicalArguments) {
-                    write(", arguments, ");
-                }
-                else {
-                    write(", void 0, ");
-                }
-                if (languageVersion >= 2 || !promiseConstructor) {
-                    write("void 0");
-                }
-                else {
-                    emitEntityNameAsExpression(promiseConstructor, false);
-                }
-                write(", function* ()");
-                emitFunctionBody(node);
-                write(")");
-                if (!isArrowFunction) {
-                    write(";");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function emitFunctionBody(node) {
-                if (!node.body) {
-                    write(" { }");
-                }
-                else {
-                    if (node.body.kind === 199) {
-                        emitBlockFunctionBody(node, node.body);
-                    }
-                    else {
-                        emitExpressionFunctionBody(node, node.body);
-                    }
-                }
-            }
-            function emitSignatureAndBody(node) {
-                var saveConvertedLoopState = convertedLoopState;
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                if (shouldEmitAsArrowFunction(node)) {
-                    emitSignatureParametersForArrow(node);
-                    write(" =>");
-                }
-                else {
-                    emitSignatureParameters(node);
-                }
-                var isAsync = ts.isAsyncFunctionLike(node);
-                if (isAsync) {
-                    emitAsyncFunctionBodyForES6(node);
-                }
-                else {
-                    emitFunctionBody(node);
-                }
-                if (!isES6ExportedDeclaration(node)) {
-                    emitExportMemberAssignment(node);
-                }
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-            }
-            function emitFunctionBodyPreamble(node) {
-                emitCaptureThisForNodeIfNecessary(node);
-                emitDefaultValueAssignments(node);
-                emitRestParameter(node);
-            }
-            function emitExpressionFunctionBody(node, body) {
-                if (languageVersion < 2 || node.flags & 256) {
-                    emitDownLevelExpressionFunctionBody(node, body);
-                    return;
-                }
-                write(" ");
-                var current = body;
-                while (current.kind === 177) {
-                    current = current.expression;
-                }
-                emitParenthesizedIf(body, current.kind === 171);
-            }
-            function emitDownLevelExpressionFunctionBody(node, body) {
-                write(" {");
-                increaseIndent();
-                var outPos = writer.getTextPos();
-                emitDetachedCommentsAndUpdateCommentsInfo(node.body);
-                emitFunctionBodyPreamble(node);
-                var preambleEmitted = writer.getTextPos() !== outPos;
-                decreaseIndent();
-                if (!preambleEmitted && nodeStartPositionsAreOnSameLine(node, body)) {
-                    write(" ");
-                    emitStart(body);
-                    write("return ");
-                    emit(body);
-                    emitEnd(body);
-                    write(";");
-                    emitTempDeclarations(false);
-                    write(" ");
-                }
-                else {
-                    increaseIndent();
-                    writeLine();
-                    emitLeadingComments(node.body);
-                    emitStart(body);
-                    write("return ");
-                    emit(body);
-                    emitEnd(body);
-                    write(";");
-                    emitTrailingComments(node.body);
-                    emitTempDeclarations(true);
-                    decreaseIndent();
-                    writeLine();
-                }
-                emitStart(node.body);
-                write("}");
-                emitEnd(node.body);
-            }
-            function emitBlockFunctionBody(node, body) {
-                write(" {");
-                var initialTextPos = writer.getTextPos();
-                increaseIndent();
-                emitDetachedCommentsAndUpdateCommentsInfo(body.statements);
-                var startIndex = emitDirectivePrologues(body.statements, true);
-                emitFunctionBodyPreamble(node);
-                decreaseIndent();
-                var preambleEmitted = writer.getTextPos() !== initialTextPos;
-                if (!preambleEmitted && nodeEndIsOnSameLineAsNodeStart(body, body)) {
-                    for (var _a = 0, _b = body.statements; _a < _b.length; _a++) {
-                        var statement = _b[_a];
-                        write(" ");
-                        emit(statement);
-                    }
-                    emitTempDeclarations(false);
-                    write(" ");
-                    emitLeadingCommentsOfPosition(body.statements.end);
-                }
-                else {
-                    increaseIndent();
-                    emitLinesStartingAt(body.statements, startIndex);
-                    emitTempDeclarations(true);
-                    writeLine();
-                    emitLeadingCommentsOfPosition(body.statements.end);
-                    decreaseIndent();
-                }
-                emitToken(16, body.statements.end);
-            }
-            function getSuperCallAtGivenIndex(ctor, index) {
-                if (!ctor.body) {
-                    return undefined;
-                }
-                var statements = ctor.body.statements;
-                if (!statements || index >= statements.length) {
-                    return undefined;
-                }
-                var statement = statements[index];
-                if (statement.kind === 202) {
-                    return ts.isSuperCallExpression(statement.expression) ? statement : undefined;
-                }
-            }
-            function emitParameterPropertyAssignments(node) {
-                ts.forEach(node.parameters, function (param) {
-                    if (param.flags & 92) {
-                        writeLine();
-                        emitStart(param);
-                        emitStart(param.name);
-                        write("this.");
-                        emitNodeWithoutSourceMap(param.name);
-                        emitEnd(param.name);
-                        write(" = ");
-                        emit(param.name);
-                        write(";");
-                        emitEnd(param);
-                    }
-                });
-            }
-            function emitMemberAccessForPropertyName(memberName) {
-                if (memberName.kind === 9 || memberName.kind === 8) {
-                    write("[");
-                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
-                    write("]");
-                }
-                else if (memberName.kind === 140) {
-                    emitComputedPropertyName(memberName);
-                }
-                else {
-                    write(".");
-                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
-                }
-            }
-            function getInitializedProperties(node, isStatic) {
-                var properties = [];
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    if (member.kind === 145 && isStatic === ((member.flags & 32) !== 0) && member.initializer) {
-                        properties.push(member);
-                    }
-                }
-                return properties;
-            }
-            function emitPropertyDeclarations(node, properties) {
-                for (var _a = 0, properties_6 = properties; _a < properties_6.length; _a++) {
-                    var property = properties_6[_a];
-                    emitPropertyDeclaration(node, property);
-                }
-            }
-            function emitPropertyDeclaration(node, property, receiver, isExpression) {
-                writeLine();
-                emitLeadingComments(property);
-                emitStart(property);
-                emitStart(property.name);
-                if (receiver) {
-                    emit(receiver);
-                }
-                else {
-                    if (property.flags & 32) {
-                        emitDeclarationName(node);
-                    }
-                    else {
-                        write("this");
-                    }
-                }
-                emitMemberAccessForPropertyName(property.name);
-                emitEnd(property.name);
-                write(" = ");
-                emit(property.initializer);
-                if (!isExpression) {
-                    write(";");
-                }
-                emitEnd(property);
-                emitTrailingComments(property);
-            }
-            function emitMemberFunctionsForES5AndLower(node) {
-                ts.forEach(node.members, function (member) {
-                    if (member.kind === 198) {
-                        writeLine();
-                        write(";");
-                    }
-                    else if (member.kind === 147 || node.kind === 146) {
-                        if (!member.body) {
-                            return emitCommentsOnNotEmittedNode(member);
-                        }
-                        writeLine();
-                        emitLeadingComments(member);
-                        emitStart(member);
-                        emitStart(member.name);
-                        emitClassMemberPrefix(node, member);
-                        emitMemberAccessForPropertyName(member.name);
-                        emitEnd(member.name);
-                        write(" = ");
-                        emitFunctionDeclaration(member);
-                        emitEnd(member);
-                        write(";");
-                        emitTrailingComments(member);
-                    }
-                    else if (member.kind === 149 || member.kind === 150) {
-                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
-                        if (member === accessors.firstAccessor) {
-                            writeLine();
-                            emitStart(member);
-                            write("Object.defineProperty(");
-                            emitStart(member.name);
-                            emitClassMemberPrefix(node, member);
-                            write(", ");
-                            emitExpressionForPropertyName(member.name);
-                            emitEnd(member.name);
-                            write(", {");
-                            increaseIndent();
-                            if (accessors.getAccessor) {
-                                writeLine();
-                                emitLeadingComments(accessors.getAccessor);
-                                write("get: ");
-                                emitStart(accessors.getAccessor);
-                                write("function ");
-                                emitSignatureAndBody(accessors.getAccessor);
-                                emitEnd(accessors.getAccessor);
-                                emitTrailingComments(accessors.getAccessor);
-                                write(",");
-                            }
-                            if (accessors.setAccessor) {
-                                writeLine();
-                                emitLeadingComments(accessors.setAccessor);
-                                write("set: ");
-                                emitStart(accessors.setAccessor);
-                                write("function ");
-                                emitSignatureAndBody(accessors.setAccessor);
-                                emitEnd(accessors.setAccessor);
-                                emitTrailingComments(accessors.setAccessor);
-                                write(",");
-                            }
-                            writeLine();
-                            write("enumerable: true,");
-                            writeLine();
-                            write("configurable: true");
-                            decreaseIndent();
-                            writeLine();
-                            write("});");
-                            emitEnd(member);
-                        }
-                    }
-                });
-            }
-            function emitMemberFunctionsForES6AndHigher(node) {
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    if ((member.kind === 147 || node.kind === 146) && !member.body) {
-                        emitCommentsOnNotEmittedNode(member);
-                    }
-                    else if (member.kind === 147 ||
-                        member.kind === 149 ||
-                        member.kind === 150) {
-                        writeLine();
-                        emitLeadingComments(member);
-                        emitStart(member);
-                        if (member.flags & 32) {
-                            write("static ");
-                        }
-                        if (member.kind === 149) {
-                            write("get ");
-                        }
-                        else if (member.kind === 150) {
-                            write("set ");
-                        }
-                        if (member.asteriskToken) {
-                            write("*");
-                        }
-                        emit(member.name);
-                        emitSignatureAndBody(member);
-                        emitEnd(member);
-                        emitTrailingComments(member);
-                    }
-                    else if (member.kind === 198) {
-                        writeLine();
-                        write(";");
-                    }
-                }
-            }
-            function emitConstructor(node, baseTypeElement) {
-                var saveConvertedLoopState = convertedLoopState;
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                emitConstructorWorker(node, baseTypeElement);
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-            }
-            function emitConstructorWorker(node, baseTypeElement) {
-                var hasInstancePropertyWithInitializer = false;
-                ts.forEach(node.members, function (member) {
-                    if (member.kind === 148 && !member.body) {
-                        emitCommentsOnNotEmittedNode(member);
-                    }
-                    if (member.kind === 145 && member.initializer && (member.flags & 32) === 0) {
-                        hasInstancePropertyWithInitializer = true;
-                    }
-                });
-                var ctor = ts.getFirstConstructorWithBody(node);
-                if (languageVersion >= 2 && !ctor && !hasInstancePropertyWithInitializer) {
-                    return;
-                }
-                if (ctor) {
-                    emitLeadingComments(ctor);
-                }
-                emitStart(ctor || node);
-                if (languageVersion < 2) {
-                    write("function ");
-                    emitDeclarationName(node);
-                    emitSignatureParameters(ctor);
-                }
-                else {
-                    write("constructor");
-                    if (ctor) {
-                        emitSignatureParameters(ctor);
-                    }
-                    else {
-                        if (baseTypeElement) {
-                            write("(...args)");
-                        }
-                        else {
-                            write("()");
-                        }
-                    }
-                }
-                var startIndex = 0;
-                write(" {");
-                increaseIndent();
-                if (ctor) {
-                    startIndex = emitDirectivePrologues(ctor.body.statements, true);
-                    emitDetachedCommentsAndUpdateCommentsInfo(ctor.body.statements);
-                }
-                emitCaptureThisForNodeIfNecessary(node);
-                var superCall;
-                if (ctor) {
-                    emitDefaultValueAssignments(ctor);
-                    emitRestParameter(ctor);
-                    if (baseTypeElement) {
-                        superCall = getSuperCallAtGivenIndex(ctor, startIndex);
-                        if (superCall) {
-                            writeLine();
-                            emit(superCall);
-                        }
-                    }
-                    emitParameterPropertyAssignments(ctor);
-                }
-                else {
-                    if (baseTypeElement) {
-                        writeLine();
-                        emitStart(baseTypeElement);
-                        if (languageVersion < 2) {
-                            write("_super.apply(this, arguments);");
-                        }
-                        else {
-                            write("super(...args);");
-                        }
-                        emitEnd(baseTypeElement);
-                    }
-                }
-                emitPropertyDeclarations(node, getInitializedProperties(node, false));
-                if (ctor) {
-                    var statements = ctor.body.statements;
-                    if (superCall) {
-                        statements = statements.slice(1);
-                    }
-                    emitLinesStartingAt(statements, startIndex);
-                }
-                emitTempDeclarations(true);
-                writeLine();
-                if (ctor) {
-                    emitLeadingCommentsOfPosition(ctor.body.statements.end);
-                }
-                decreaseIndent();
-                emitToken(16, ctor ? ctor.body.statements.end : node.members.end);
-                emitEnd(ctor || node);
-                if (ctor) {
-                    emitTrailingComments(ctor);
-                }
-            }
-            function emitClassExpression(node) {
-                return emitClassLikeDeclaration(node);
-            }
-            function emitClassDeclaration(node) {
-                return emitClassLikeDeclaration(node);
-            }
-            function emitClassLikeDeclaration(node) {
-                if (languageVersion < 2) {
-                    emitClassLikeDeclarationBelowES6(node);
-                }
-                else {
-                    emitClassLikeDeclarationForES6AndHigher(node);
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile && node.name) {
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            function emitClassLikeDeclarationForES6AndHigher(node) {
-                var decoratedClassAlias;
-                var isHoistedDeclarationInSystemModule = shouldHoistDeclarationInSystemJsModule(node);
-                var isDecorated = ts.nodeIsDecorated(node);
-                var rewriteAsClassExpression = isDecorated || isHoistedDeclarationInSystemModule;
-                if (node.kind === 221) {
-                    if (rewriteAsClassExpression) {
-                        if (isDecorated && resolver.getNodeCheckFlags(node) & 524288) {
-                            decoratedClassAlias = ts.unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default"));
-                            decoratedClassAliases[ts.getNodeId(node)] = decoratedClassAlias;
-                            write("let " + decoratedClassAlias + ";");
-                            writeLine();
-                        }
-                        if (isES6ExportedDeclaration(node) && !(node.flags & 512)) {
-                            write("export ");
-                        }
-                        if (!isHoistedDeclarationInSystemModule) {
-                            write("let ");
-                        }
-                        emitDeclarationName(node);
-                        if (decoratedClassAlias !== undefined) {
-                            write(" = " + decoratedClassAlias);
-                        }
-                        write(" = ");
-                    }
-                    else if (isES6ExportedDeclaration(node)) {
-                        write("export ");
-                        if (node.flags & 512) {
-                            write("default ");
-                        }
-                    }
-                }
-                var staticProperties = getInitializedProperties(node, true);
-                var isClassExpressionWithStaticProperties = staticProperties.length > 0 && node.kind === 192;
-                var tempVariable;
-                if (isClassExpressionWithStaticProperties) {
-                    tempVariable = createAndRecordTempVariable(0);
-                    write("(");
-                    increaseIndent();
-                    emit(tempVariable);
-                    write(" = ");
-                }
-                write("class");
-                if (node.name || (node.flags & 512 && (staticProperties.length > 0 || modulekind !== ts.ModuleKind.ES6) && !rewriteAsClassExpression)) {
-                    write(" ");
-                    emitDeclarationName(node);
-                }
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-                if (baseTypeNode) {
-                    write(" extends ");
-                    emit(baseTypeNode.expression);
-                }
-                write(" {");
-                increaseIndent();
-                writeLine();
-                emitConstructor(node, baseTypeNode);
-                emitMemberFunctionsForES6AndHigher(node);
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.members.end);
-                if (rewriteAsClassExpression) {
-                    decoratedClassAliases[ts.getNodeId(node)] = undefined;
-                    write(";");
-                }
-                if (isClassExpressionWithStaticProperties) {
-                    for (var _a = 0, staticProperties_1 = staticProperties; _a < staticProperties_1.length; _a++) {
-                        var property = staticProperties_1[_a];
-                        write(",");
-                        writeLine();
-                        emitPropertyDeclaration(node, property, tempVariable, true);
-                    }
-                    write(",");
-                    writeLine();
-                    emit(tempVariable);
-                    decreaseIndent();
-                    write(")");
-                }
-                else {
-                    writeLine();
-                    emitPropertyDeclarations(node, staticProperties);
-                    emitDecoratorsOfClass(node, decoratedClassAlias);
-                }
-                if (!(node.flags & 1)) {
-                    return;
-                }
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    emitExportMemberAssignment(node);
-                }
-                else {
-                    if (node.flags & 512) {
-                        if (isDecorated) {
-                            writeLine();
-                            write("export default ");
-                            emitDeclarationName(node);
-                            write(";");
-                        }
-                    }
-                    else if (node.parent.kind !== 256) {
-                        writeLine();
-                        emitStart(node);
-                        emitModuleMemberName(node);
-                        write(" = ");
-                        emitDeclarationName(node);
-                        emitEnd(node);
-                        write(";");
-                    }
-                }
-            }
-            function emitClassLikeDeclarationBelowES6(node) {
-                if (node.kind === 221) {
-                    if (!shouldHoistDeclarationInSystemJsModule(node)) {
-                        write("var ");
-                    }
-                    emitDeclarationName(node);
-                    write(" = ");
-                }
-                write("(function (");
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-                if (baseTypeNode) {
-                    write("_super");
-                }
-                write(") {");
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                var saveComputedPropertyNamesToGeneratedNames = computedPropertyNamesToGeneratedNames;
-                var saveConvertedLoopState = convertedLoopState;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                computedPropertyNamesToGeneratedNames = undefined;
-                increaseIndent();
-                if (baseTypeNode) {
-                    writeLine();
-                    emitStart(baseTypeNode);
-                    write("__extends(");
-                    emitDeclarationName(node);
-                    write(", _super);");
-                    emitEnd(baseTypeNode);
-                }
-                writeLine();
-                emitConstructor(node, baseTypeNode);
-                emitMemberFunctionsForES5AndLower(node);
-                emitPropertyDeclarations(node, getInitializedProperties(node, true));
-                writeLine();
-                emitDecoratorsOfClass(node, undefined);
-                writeLine();
-                emitToken(16, node.members.end, function () {
-                    write("return ");
-                    emitDeclarationName(node);
-                });
-                write(";");
-                emitTempDeclarations(true);
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-                computedPropertyNamesToGeneratedNames = saveComputedPropertyNamesToGeneratedNames;
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.members.end);
-                emitStart(node);
-                write("(");
-                if (baseTypeNode) {
-                    emit(baseTypeNode.expression);
-                }
-                write("))");
-                if (node.kind === 221) {
-                    write(";");
-                }
-                emitEnd(node);
-                if (node.kind === 221) {
-                    emitExportMemberAssignment(node);
-                }
-            }
-            function emitClassMemberPrefix(node, member) {
-                emitDeclarationName(node);
-                if (!(member.flags & 32)) {
-                    write(".prototype");
-                }
-            }
-            function emitDecoratorsOfClass(node, decoratedClassAlias) {
-                emitDecoratorsOfMembers(node, 0);
-                emitDecoratorsOfMembers(node, 32);
-                emitDecoratorsOfConstructor(node, decoratedClassAlias);
-            }
-            function emitDecoratorsOfConstructor(node, decoratedClassAlias) {
-                var decorators = node.decorators;
-                var constructor = ts.getFirstConstructorWithBody(node);
-                var firstParameterDecorator = constructor && ts.forEach(constructor.parameters, function (parameter) { return parameter.decorators; });
-                if (!decorators && !firstParameterDecorator) {
-                    return;
-                }
-                writeLine();
-                emitStart(node.decorators || firstParameterDecorator);
-                emitDeclarationName(node);
-                if (decoratedClassAlias !== undefined) {
-                    write(" = " + decoratedClassAlias);
-                }
-                write(" = __decorate([");
-                increaseIndent();
-                writeLine();
-                var decoratorCount = decorators ? decorators.length : 0;
-                var argumentsWritten = emitList(decorators, 0, decoratorCount, true, false, false, true, function (decorator) { return emit(decorator.expression); });
-                if (firstParameterDecorator) {
-                    argumentsWritten += emitDecoratorsOfParameters(constructor, argumentsWritten > 0);
-                }
-                emitSerializedTypeMetadata(node, argumentsWritten >= 0);
-                decreaseIndent();
-                writeLine();
-                write("], ");
-                emitDeclarationName(node);
-                write(")");
-                emitEnd(node.decorators || firstParameterDecorator);
-                write(";");
-                writeLine();
-            }
-            function emitDecoratorsOfMembers(node, staticFlag) {
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    if ((member.flags & 32) !== staticFlag) {
-                        continue;
-                    }
-                    if (!ts.nodeCanBeDecorated(member)) {
-                        continue;
-                    }
-                    var decorators = void 0;
-                    var functionLikeMember = void 0;
-                    if (ts.isAccessor(member)) {
-                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
-                        if (member !== accessors.firstAccessor) {
-                            continue;
-                        }
-                        decorators = accessors.firstAccessor.decorators;
-                        if (!decorators && accessors.secondAccessor) {
-                            decorators = accessors.secondAccessor.decorators;
-                        }
-                        functionLikeMember = accessors.setAccessor;
-                    }
-                    else {
-                        decorators = member.decorators;
-                        if (member.kind === 147) {
-                            functionLikeMember = member;
-                        }
-                    }
-                    var firstParameterDecorator = functionLikeMember && ts.forEach(functionLikeMember.parameters, function (parameter) { return parameter.decorators; });
-                    if (!decorators && !firstParameterDecorator) {
-                        continue;
-                    }
-                    writeLine();
-                    emitStart(decorators || firstParameterDecorator);
-                    write("__decorate([");
-                    increaseIndent();
-                    writeLine();
-                    var decoratorCount = decorators ? decorators.length : 0;
-                    var argumentsWritten = emitList(decorators, 0, decoratorCount, true, false, false, true, function (decorator) { return emit(decorator.expression); });
-                    if (firstParameterDecorator) {
-                        argumentsWritten += emitDecoratorsOfParameters(functionLikeMember, argumentsWritten > 0);
-                    }
-                    emitSerializedTypeMetadata(member, argumentsWritten > 0);
-                    decreaseIndent();
-                    writeLine();
-                    write("], ");
-                    emitClassMemberPrefix(node, member);
-                    write(", ");
-                    emitExpressionForPropertyName(member.name);
-                    if (languageVersion > 0) {
-                        if (member.kind !== 145) {
-                            write(", null");
-                        }
-                        else {
-                            write(", void 0");
-                        }
-                    }
-                    write(")");
-                    emitEnd(decorators || firstParameterDecorator);
-                    write(";");
-                    writeLine();
-                }
-            }
-            function emitDecoratorsOfParameters(node, leadingComma) {
-                var argumentsWritten = 0;
-                if (node) {
-                    var parameterIndex_1 = 0;
-                    for (var _a = 0, _b = node.parameters; _a < _b.length; _a++) {
-                        var parameter = _b[_a];
-                        if (ts.nodeIsDecorated(parameter)) {
-                            var decorators = parameter.decorators;
-                            argumentsWritten += emitList(decorators, 0, decorators.length, true, false, leadingComma, true, function (decorator) {
-                                write("__param(" + parameterIndex_1 + ", ");
-                                emit(decorator.expression);
-                                write(")");
-                            });
-                            leadingComma = true;
-                        }
-                        parameterIndex_1++;
-                    }
-                }
-                return argumentsWritten;
-            }
-            function shouldEmitTypeMetadata(node) {
-                switch (node.kind) {
-                    case 147:
-                    case 149:
-                    case 150:
-                    case 145:
-                        return true;
-                }
-                return false;
-            }
-            function shouldEmitReturnTypeMetadata(node) {
-                switch (node.kind) {
-                    case 147:
-                        return true;
-                }
-                return false;
-            }
-            function shouldEmitParamTypesMetadata(node) {
-                switch (node.kind) {
-                    case 221:
-                    case 147:
-                    case 150:
-                        return true;
-                }
-                return false;
-            }
-            function emitSerializedTypeOfNode(node) {
-                switch (node.kind) {
-                    case 221:
-                        write("Function");
-                        return;
-                    case 145:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 142:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 149:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 150:
-                        emitSerializedTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
-                        return;
-                }
-                if (ts.isFunctionLike(node)) {
-                    write("Function");
-                    return;
-                }
-                write("void 0");
-            }
-            function emitSerializedTypeNode(node) {
-                if (node) {
-                    switch (node.kind) {
-                        case 103:
-                            write("void 0");
-                            return;
-                        case 164:
-                            emitSerializedTypeNode(node.type);
-                            return;
-                        case 156:
-                        case 157:
-                            write("Function");
-                            return;
-                        case 160:
-                        case 161:
-                            write("Array");
-                            return;
-                        case 154:
-                        case 120:
-                            write("Boolean");
-                            return;
-                        case 132:
-                        case 166:
-                            write("String");
-                            return;
-                        case 130:
-                            write("Number");
-                            return;
-                        case 133:
-                            write("Symbol");
-                            return;
-                        case 155:
-                            emitSerializedTypeReferenceNode(node);
-                            return;
-                        case 158:
-                        case 159:
-                        case 162:
-                        case 163:
-                        case 117:
-                        case 165:
-                            break;
-                        default:
-                            ts.Debug.fail("Cannot serialize unexpected type node.");
-                            break;
-                    }
-                }
-                write("Object");
-            }
-            function emitSerializedTypeReferenceNode(node) {
-                var location = node.parent;
-                while (ts.isDeclaration(location) || ts.isTypeNode(location)) {
-                    location = location.parent;
-                }
-                var typeName = ts.cloneEntityName(node.typeName, location);
-                var result = resolver.getTypeReferenceSerializationKind(typeName);
-                switch (result) {
-                    case ts.TypeReferenceSerializationKind.Unknown:
-                        var temp = createAndRecordTempVariable(0);
-                        write("(typeof (");
-                        emitNodeWithoutSourceMap(temp);
-                        write(" = ");
-                        emitEntityNameAsExpression(typeName, true);
-                        write(") === 'function' && ");
-                        emitNodeWithoutSourceMap(temp);
-                        write(") || Object");
-                        break;
-                    case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
-                        emitEntityNameAsExpression(typeName, false);
-                        break;
-                    case ts.TypeReferenceSerializationKind.VoidType:
-                        write("void 0");
-                        break;
-                    case ts.TypeReferenceSerializationKind.BooleanType:
-                        write("Boolean");
-                        break;
-                    case ts.TypeReferenceSerializationKind.NumberLikeType:
-                        write("Number");
-                        break;
-                    case ts.TypeReferenceSerializationKind.StringLikeType:
-                        write("String");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ArrayLikeType:
-                        write("Array");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ESSymbolType:
-                        if (languageVersion < 2) {
-                            write("typeof Symbol === 'function' ? Symbol : Object");
-                        }
-                        else {
-                            write("Symbol");
-                        }
-                        break;
-                    case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
-                        write("Function");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ObjectType:
-                        write("Object");
-                        break;
-                }
-            }
-            function emitSerializedParameterTypesOfNode(node) {
-                if (node) {
-                    var valueDeclaration = void 0;
-                    if (node.kind === 221) {
-                        valueDeclaration = ts.getFirstConstructorWithBody(node);
-                    }
-                    else if (ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)) {
-                        valueDeclaration = node;
-                    }
-                    if (valueDeclaration) {
-                        var parameters = valueDeclaration.parameters;
-                        var parameterCount = parameters.length;
-                        if (parameterCount > 0) {
-                            for (var i = 0; i < parameterCount; i++) {
-                                if (i > 0) {
-                                    write(", ");
-                                }
-                                if (parameters[i].dotDotDotToken) {
-                                    var parameterType = parameters[i].type;
-                                    if (parameterType.kind === 160) {
-                                        parameterType = parameterType.elementType;
-                                    }
-                                    else if (parameterType.kind === 155 && parameterType.typeArguments && parameterType.typeArguments.length === 1) {
-                                        parameterType = parameterType.typeArguments[0];
-                                    }
-                                    else {
-                                        parameterType = undefined;
-                                    }
-                                    emitSerializedTypeNode(parameterType);
-                                }
-                                else {
-                                    emitSerializedTypeOfNode(parameters[i]);
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            function emitSerializedReturnTypeOfNode(node) {
-                if (node && ts.isFunctionLike(node) && node.type) {
-                    emitSerializedTypeNode(node.type);
-                    return;
-                }
-                write("void 0");
-            }
-            function emitSerializedTypeMetadata(node, writeComma) {
-                var argumentsWritten = 0;
-                if (compilerOptions.emitDecoratorMetadata) {
-                    if (shouldEmitTypeMetadata(node)) {
-                        if (writeComma) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:type', ");
-                        emitSerializedTypeOfNode(node);
-                        write(")");
-                        argumentsWritten++;
-                    }
-                    if (shouldEmitParamTypesMetadata(node)) {
-                        if (writeComma || argumentsWritten) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:paramtypes', [");
-                        emitSerializedParameterTypesOfNode(node);
-                        write("])");
-                        argumentsWritten++;
-                    }
-                    if (shouldEmitReturnTypeMetadata(node)) {
-                        if (writeComma || argumentsWritten) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:returntype', ");
-                        emitSerializedReturnTypeOfNode(node);
-                        write(")");
-                        argumentsWritten++;
-                    }
-                }
-                return argumentsWritten;
-            }
-            function emitInterfaceDeclaration(node) {
-                emitCommentsOnNotEmittedNode(node);
-            }
-            function shouldEmitEnumDeclaration(node) {
-                var isConstEnum = ts.isConst(node);
-                return !isConstEnum || compilerOptions.preserveConstEnums || compilerOptions.isolatedModules;
-            }
-            function emitEnumDeclaration(node) {
-                if (!shouldEmitEnumDeclaration(node)) {
-                    return;
-                }
-                if (!shouldHoistDeclarationInSystemJsModule(node)) {
-                    var isES6ExportedEnum = isES6ExportedDeclaration(node);
-                    if (!(node.flags & 1) || (isES6ExportedEnum && isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 224))) {
-                        emitStart(node);
-                        if (isES6ExportedEnum) {
-                            write("export ");
-                        }
-                        write("var ");
-                        emit(node.name);
-                        emitEnd(node);
-                        write(";");
-                    }
-                }
-                writeLine();
-                emitStart(node);
-                write("(function (");
-                emitStart(node.name);
-                write(getGeneratedNameForNode(node));
-                emitEnd(node.name);
-                write(") {");
-                increaseIndent();
-                emitLines(node.members);
-                decreaseIndent();
-                writeLine();
-                emitToken(16, node.members.end);
-                write(")(");
-                emitModuleMemberName(node);
-                write(" || (");
-                emitModuleMemberName(node);
-                write(" = {}));");
-                emitEnd(node);
-                if (!isES6ExportedDeclaration(node) && node.flags & 1 && !shouldHoistDeclarationInSystemJsModule(node)) {
-                    writeLine();
-                    emitStart(node);
-                    write("var ");
-                    emit(node.name);
-                    write(" = ");
-                    emitModuleMemberName(node);
-                    emitEnd(node);
-                    write(";");
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
-                    if (modulekind === ts.ModuleKind.System && (node.flags & 1)) {
-                        writeLine();
-                        write(exportFunctionForFile + "(\"");
-                        emitDeclarationName(node);
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(");");
-                    }
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            function emitEnumMember(node) {
-                var enumParent = node.parent;
-                emitStart(node);
-                write(getGeneratedNameForNode(enumParent));
-                write("[");
-                write(getGeneratedNameForNode(enumParent));
-                write("[");
-                emitExpressionForPropertyName(node.name);
-                write("] = ");
-                writeEnumMemberDeclarationValue(node);
-                write("] = ");
-                emitExpressionForPropertyName(node.name);
-                emitEnd(node);
-                write(";");
-            }
-            function writeEnumMemberDeclarationValue(member) {
-                var value = resolver.getConstantValue(member);
-                if (value !== undefined) {
-                    write(value.toString());
-                    return;
-                }
-                else if (member.initializer) {
-                    emit(member.initializer);
-                }
-                else {
-                    write("undefined");
-                }
-            }
-            function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
-                if (moduleDeclaration.body.kind === 225) {
-                    var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
-                    return recursiveInnerModule || moduleDeclaration.body;
-                }
-            }
-            function shouldEmitModuleDeclaration(node) {
-                return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules);
-            }
-            function isModuleMergedWithES6Class(node) {
-                return languageVersion === 2 && !!(resolver.getNodeCheckFlags(node) & 32768);
-            }
-            function isFirstDeclarationOfKind(node, declarations, kind) {
-                return !ts.forEach(declarations, function (declaration) { return declaration.kind === kind && declaration.pos < node.pos; });
-            }
-            function emitModuleDeclaration(node) {
-                var shouldEmit = shouldEmitModuleDeclaration(node);
-                if (!shouldEmit) {
-                    return emitCommentsOnNotEmittedNode(node);
-                }
-                var hoistedInDeclarationScope = shouldHoistDeclarationInSystemJsModule(node);
-                var emitVarForModule = !hoistedInDeclarationScope && !isModuleMergedWithES6Class(node);
-                if (emitVarForModule) {
-                    var isES6ExportedNamespace = isES6ExportedDeclaration(node);
-                    if (!isES6ExportedNamespace || isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 225)) {
-                        emitStart(node);
-                        if (isES6ExportedNamespace) {
-                            write("export ");
-                        }
-                        write("var ");
-                        emit(node.name);
-                        write(";");
-                        emitEnd(node);
-                        writeLine();
-                    }
-                }
-                emitStart(node);
-                write("(function (");
-                emitStart(node.name);
-                write(getGeneratedNameForNode(node));
-                emitEnd(node.name);
-                write(") ");
-                if (node.body.kind === 226) {
-                    var saveConvertedLoopState = convertedLoopState;
-                    var saveTempFlags = tempFlags;
-                    var saveTempVariables = tempVariables;
-                    convertedLoopState = undefined;
-                    tempFlags = 0;
-                    tempVariables = undefined;
-                    emit(node.body);
-                    ts.Debug.assert(convertedLoopState === undefined);
-                    convertedLoopState = saveConvertedLoopState;
-                    tempFlags = saveTempFlags;
-                    tempVariables = saveTempVariables;
-                }
-                else {
-                    write("{");
-                    increaseIndent();
-                    emitCaptureThisForNodeIfNecessary(node);
-                    writeLine();
-                    emit(node.body);
-                    decreaseIndent();
-                    writeLine();
-                    var moduleBlock = getInnerMostModuleDeclarationFromDottedModule(node).body;
-                    emitToken(16, moduleBlock.statements.end);
-                }
-                write(")(");
-                if ((node.flags & 1) && !isES6ExportedDeclaration(node)) {
-                    emit(node.name);
-                    write(" = ");
-                }
-                emitModuleMemberName(node);
-                write(" || (");
-                emitModuleMemberName(node);
-                write(" = {}));");
-                emitEnd(node);
-                if (!isES6ExportedDeclaration(node) && node.name.kind === 69 && node.parent === currentSourceFile) {
-                    if (modulekind === ts.ModuleKind.System && (node.flags & 1)) {
-                        writeLine();
-                        write(exportFunctionForFile + "(\"");
-                        emitDeclarationName(node);
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(");");
-                    }
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            function tryRenameExternalModule(moduleName) {
-                if (renamedDependencies && ts.hasProperty(renamedDependencies, moduleName.text)) {
-                    return "\"" + renamedDependencies[moduleName.text] + "\"";
-                }
-                return undefined;
-            }
-            function emitRequire(moduleName) {
-                if (moduleName.kind === 9) {
-                    write("require(");
-                    var text = tryRenameExternalModule(moduleName);
-                    if (text) {
-                        write(text);
-                    }
-                    else {
-                        emitStart(moduleName);
-                        emitLiteral(moduleName);
-                        emitEnd(moduleName);
-                    }
-                    emitToken(18, moduleName.end);
-                }
-                else {
-                    write("require()");
-                }
-            }
-            function getNamespaceDeclarationNode(node) {
-                if (node.kind === 229) {
-                    return node;
-                }
-                var importClause = node.importClause;
-                if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232) {
-                    return importClause.namedBindings;
-                }
-            }
-            function isDefaultImport(node) {
-                return node.kind === 230 && node.importClause && !!node.importClause.name;
-            }
-            function emitExportImportAssignments(node) {
-                if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
-                    emitExportMemberAssignments(node.name);
-                }
-                ts.forEachChild(node, emitExportImportAssignments);
-            }
-            function emitImportDeclaration(node) {
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    return emitExternalImportDeclaration(node);
-                }
-                if (node.importClause) {
-                    var shouldEmitDefaultBindings = resolver.isReferencedAliasDeclaration(node.importClause);
-                    var shouldEmitNamedBindings = node.importClause.namedBindings && resolver.isReferencedAliasDeclaration(node.importClause.namedBindings, true);
-                    if (shouldEmitDefaultBindings || shouldEmitNamedBindings) {
-                        write("import ");
-                        emitStart(node.importClause);
-                        if (shouldEmitDefaultBindings) {
-                            emit(node.importClause.name);
-                            if (shouldEmitNamedBindings) {
-                                write(", ");
-                            }
-                        }
-                        if (shouldEmitNamedBindings) {
-                            emitLeadingComments(node.importClause.namedBindings);
-                            emitStart(node.importClause.namedBindings);
-                            if (node.importClause.namedBindings.kind === 232) {
-                                write("* as ");
-                                emit(node.importClause.namedBindings.name);
-                            }
-                            else {
-                                write("{ ");
-                                emitExportOrImportSpecifierList(node.importClause.namedBindings.elements, resolver.isReferencedAliasDeclaration);
-                                write(" }");
-                            }
-                            emitEnd(node.importClause.namedBindings);
-                            emitTrailingComments(node.importClause.namedBindings);
-                        }
-                        emitEnd(node.importClause);
-                        write(" from ");
-                        emit(node.moduleSpecifier);
-                        write(";");
-                    }
-                }
-                else {
-                    write("import ");
-                    emit(node.moduleSpecifier);
-                    write(";");
-                }
-            }
-            function emitExternalImportDeclaration(node) {
-                if (ts.contains(externalImports, node)) {
-                    var isExportedImport = node.kind === 229 && (node.flags & 1) !== 0;
-                    var namespaceDeclaration = getNamespaceDeclarationNode(node);
-                    var varOrConst = (languageVersion <= 1) ? "var " : "const ";
-                    if (modulekind !== ts.ModuleKind.AMD) {
-                        emitLeadingComments(node);
-                        emitStart(node);
-                        if (namespaceDeclaration && !isDefaultImport(node)) {
-                            if (!isExportedImport) {
-                                write(varOrConst);
-                            }
-                            ;
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                        }
-                        else {
-                            var isNakedImport = 230 && !node.importClause;
-                            if (!isNakedImport) {
-                                write(varOrConst);
-                                write(getGeneratedNameForNode(node));
-                                write(" = ");
-                            }
-                        }
-                        emitRequire(ts.getExternalModuleName(node));
-                        if (namespaceDeclaration && isDefaultImport(node)) {
-                            write(", ");
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            write(getGeneratedNameForNode(node));
-                        }
-                        write(";");
-                        emitEnd(node);
-                        emitExportImportAssignments(node);
-                        emitTrailingComments(node);
-                    }
-                    else {
-                        if (isExportedImport) {
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            emit(namespaceDeclaration.name);
-                            write(";");
-                        }
-                        else if (namespaceDeclaration && isDefaultImport(node)) {
-                            write(varOrConst);
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            write(getGeneratedNameForNode(node));
-                            write(";");
-                        }
-                        emitExportImportAssignments(node);
-                    }
-                }
-            }
-            function emitImportEqualsDeclaration(node) {
-                if (ts.isExternalModuleImportEqualsDeclaration(node)) {
-                    emitExternalImportDeclaration(node);
-                    return;
-                }
-                if (resolver.isReferencedAliasDeclaration(node) ||
-                    (!isCurrentFileExternalModule && resolver.isTopLevelValueImportEqualsWithEntityName(node))) {
-                    emitLeadingComments(node);
-                    emitStart(node);
-                    var variableDeclarationIsHoisted = shouldHoistVariable(node, true);
-                    var isExported = isSourceFileLevelDeclarationInSystemJsModule(node, true);
-                    if (!variableDeclarationIsHoisted) {
-                        ts.Debug.assert(!isExported);
-                        if (isES6ExportedDeclaration(node)) {
-                            write("export ");
-                            write("var ");
-                        }
-                        else if (!(node.flags & 1)) {
-                            write("var ");
-                        }
-                    }
-                    if (isExported) {
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithoutSourceMap(node.name);
-                        write("\", ");
-                    }
-                    emitModuleMemberName(node);
-                    write(" = ");
-                    emit(node.moduleReference);
-                    if (isExported) {
-                        write(")");
-                    }
-                    write(";");
-                    emitEnd(node);
-                    emitExportImportAssignments(node);
-                    emitTrailingComments(node);
-                }
-            }
-            function emitExportDeclaration(node) {
-                ts.Debug.assert(modulekind !== ts.ModuleKind.System);
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    if (node.moduleSpecifier && (!node.exportClause || resolver.isValueAliasDeclaration(node))) {
-                        emitStart(node);
-                        var generatedName = getGeneratedNameForNode(node);
-                        if (node.exportClause) {
-                            if (modulekind !== ts.ModuleKind.AMD) {
-                                write("var ");
-                                write(generatedName);
-                                write(" = ");
-                                emitRequire(ts.getExternalModuleName(node));
-                                write(";");
-                            }
-                            for (var _a = 0, _b = node.exportClause.elements; _a < _b.length; _a++) {
-                                var specifier = _b[_a];
-                                if (resolver.isValueAliasDeclaration(specifier)) {
-                                    writeLine();
-                                    emitStart(specifier);
-                                    emitContainingModuleName(specifier);
-                                    write(".");
-                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                                    write(" = ");
-                                    write(generatedName);
-                                    write(".");
-                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.propertyName || specifier.name);
-                                    write(";");
-                                    emitEnd(specifier);
-                                }
-                            }
-                        }
-                        else {
-                            if (hasExportStarsToExportValues && resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
-                                writeLine();
-                                write("__export(");
-                                if (modulekind !== ts.ModuleKind.AMD) {
-                                    emitRequire(ts.getExternalModuleName(node));
-                                }
-                                else {
-                                    write(generatedName);
-                                }
-                                write(");");
-                            }
-                        }
-                        emitEnd(node);
-                    }
-                }
-                else {
-                    if (!node.exportClause || resolver.isValueAliasDeclaration(node)) {
-                        write("export ");
-                        if (node.exportClause) {
-                            write("{ ");
-                            emitExportOrImportSpecifierList(node.exportClause.elements, resolver.isValueAliasDeclaration);
-                            write(" }");
-                        }
-                        else {
-                            write("*");
-                        }
-                        if (node.moduleSpecifier) {
-                            write(" from ");
-                            emit(node.moduleSpecifier);
-                        }
-                        write(";");
-                    }
-                }
-            }
-            function emitExportOrImportSpecifierList(specifiers, shouldEmit) {
-                ts.Debug.assert(modulekind === ts.ModuleKind.ES6);
-                var needsComma = false;
-                for (var _a = 0, specifiers_1 = specifiers; _a < specifiers_1.length; _a++) {
-                    var specifier = specifiers_1[_a];
-                    if (shouldEmit(specifier)) {
-                        if (needsComma) {
-                            write(", ");
-                        }
-                        if (specifier.propertyName) {
-                            emit(specifier.propertyName);
-                            write(" as ");
-                        }
-                        emit(specifier.name);
-                        needsComma = true;
-                    }
-                }
-            }
-            function emitExportAssignment(node) {
-                if (!node.isExportEquals && resolver.isValueAliasDeclaration(node)) {
-                    if (modulekind === ts.ModuleKind.ES6) {
-                        writeLine();
-                        emitStart(node);
-                        write("export default ");
-                        var expression = node.expression;
-                        emit(expression);
-                        if (expression.kind !== 220 &&
-                            expression.kind !== 221) {
-                            write(";");
-                        }
-                        emitEnd(node);
-                    }
-                    else {
-                        writeLine();
-                        emitStart(node);
-                        if (modulekind === ts.ModuleKind.System) {
-                            write(exportFunctionForFile + "(\"default\",");
-                            emit(node.expression);
-                            write(")");
-                        }
-                        else {
-                            emitEs6ExportDefaultCompat(node);
-                            emitContainingModuleName(node);
-                            if (languageVersion === 0) {
-                                write('["default"] = ');
-                            }
-                            else {
-                                write(".default = ");
-                            }
-                            emit(node.expression);
-                        }
-                        write(";");
-                        emitEnd(node);
-                    }
-                }
-            }
-            function collectExternalModuleInfo(sourceFile) {
-                externalImports = [];
-                exportSpecifiers = {};
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                for (var _a = 0, _b = sourceFile.statements; _a < _b.length; _a++) {
-                    var node = _b[_a];
-                    switch (node.kind) {
-                        case 230:
-                            if (!node.importClause ||
-                                resolver.isReferencedAliasDeclaration(node.importClause, true)) {
-                                externalImports.push(node);
-                            }
-                            break;
-                        case 229:
-                            if (node.moduleReference.kind === 240 && resolver.isReferencedAliasDeclaration(node)) {
-                                externalImports.push(node);
-                            }
-                            break;
-                        case 236:
-                            if (node.moduleSpecifier) {
-                                if (!node.exportClause) {
-                                    if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
-                                        externalImports.push(node);
-                                        hasExportStarsToExportValues = true;
-                                    }
-                                }
-                                else if (resolver.isValueAliasDeclaration(node)) {
-                                    externalImports.push(node);
-                                }
-                            }
-                            else {
-                                for (var _c = 0, _d = node.exportClause.elements; _c < _d.length; _c++) {
-                                    var specifier = _d[_c];
-                                    var name_29 = (specifier.propertyName || specifier.name).text;
-                                    (exportSpecifiers[name_29] || (exportSpecifiers[name_29] = [])).push(specifier);
-                                }
-                            }
-                            break;
-                        case 235:
-                            if (node.isExportEquals && !exportEquals) {
-                                exportEquals = node;
-                            }
-                            break;
-                    }
-                }
-            }
-            function emitExportStarHelper() {
-                if (hasExportStarsToExportValues) {
-                    writeLine();
-                    write("function __export(m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function getLocalNameForExternalImport(node) {
-                var namespaceDeclaration = getNamespaceDeclarationNode(node);
-                if (namespaceDeclaration && !isDefaultImport(node)) {
-                    return ts.getTextOfNodeFromSourceText(currentText, namespaceDeclaration.name);
-                }
-                if (node.kind === 230 && node.importClause) {
-                    return getGeneratedNameForNode(node);
-                }
-                if (node.kind === 236 && node.moduleSpecifier) {
-                    return getGeneratedNameForNode(node);
-                }
-            }
-            function getExternalModuleNameText(importNode, emitRelativePathAsModuleName) {
-                if (emitRelativePathAsModuleName) {
-                    var name_30 = getExternalModuleNameFromDeclaration(host, resolver, importNode);
-                    if (name_30) {
-                        return "\"" + name_30 + "\"";
-                    }
-                }
-                var moduleName = ts.getExternalModuleName(importNode);
-                if (moduleName.kind === 9) {
-                    return tryRenameExternalModule(moduleName) || getLiteralText(moduleName);
-                }
-                return undefined;
-            }
-            function emitVariableDeclarationsForImports() {
-                if (externalImports.length === 0) {
-                    return;
-                }
-                writeLine();
-                var started = false;
-                for (var _a = 0, externalImports_1 = externalImports; _a < externalImports_1.length; _a++) {
-                    var importNode = externalImports_1[_a];
-                    var skipNode = importNode.kind === 236 ||
-                        (importNode.kind === 230 && !importNode.importClause);
-                    if (skipNode) {
-                        continue;
-                    }
-                    if (!started) {
-                        write("var ");
-                        started = true;
-                    }
-                    else {
-                        write(", ");
-                    }
-                    write(getLocalNameForExternalImport(importNode));
-                }
-                if (started) {
-                    write(";");
-                }
-            }
-            function emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations) {
-                if (!hasExportStarsToExportValues) {
-                    return undefined;
-                }
-                if (!exportedDeclarations && ts.isEmpty(exportSpecifiers)) {
-                    var hasExportDeclarationWithExportClause = false;
-                    for (var _a = 0, externalImports_2 = externalImports; _a < externalImports_2.length; _a++) {
-                        var externalImport = externalImports_2[_a];
-                        if (externalImport.kind === 236 && externalImport.exportClause) {
-                            hasExportDeclarationWithExportClause = true;
-                            break;
-                        }
-                    }
-                    if (!hasExportDeclarationWithExportClause) {
-                        return emitExportStarFunction(undefined);
-                    }
-                }
-                var exportedNamesStorageRef = makeUniqueName("exportedNames");
-                writeLine();
-                write("var " + exportedNamesStorageRef + " = {");
-                increaseIndent();
-                var started = false;
-                if (exportedDeclarations) {
-                    for (var i = 0; i < exportedDeclarations.length; i++) {
-                        writeExportedName(exportedDeclarations[i]);
-                    }
-                }
-                if (exportSpecifiers) {
-                    for (var n in exportSpecifiers) {
-                        for (var _b = 0, _c = exportSpecifiers[n]; _b < _c.length; _b++) {
-                            var specifier = _c[_b];
-                            writeExportedName(specifier.name);
-                        }
-                    }
-                }
-                for (var _d = 0, externalImports_3 = externalImports; _d < externalImports_3.length; _d++) {
-                    var externalImport = externalImports_3[_d];
-                    if (externalImport.kind !== 236) {
-                        continue;
-                    }
-                    var exportDecl = externalImport;
-                    if (!exportDecl.exportClause) {
-                        continue;
-                    }
-                    for (var _e = 0, _f = exportDecl.exportClause.elements; _e < _f.length; _e++) {
-                        var element = _f[_e];
-                        writeExportedName(element.name || element.propertyName);
-                    }
-                }
-                decreaseIndent();
-                writeLine();
-                write("};");
-                return emitExportStarFunction(exportedNamesStorageRef);
-                function emitExportStarFunction(localNames) {
-                    var exportStarFunction = makeUniqueName("exportStar");
-                    writeLine();
-                    write("function " + exportStarFunction + "(m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("var exports = {};");
-                    writeLine();
-                    write("for(var n in m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("if (n !== \"default\"");
-                    if (localNames) {
-                        write("&& !" + localNames + ".hasOwnProperty(n)");
-                    }
-                    write(") exports[n] = m[n];");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                    writeLine();
-                    write(exportFunctionForFile + "(exports);");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                    return exportStarFunction;
-                }
-                function writeExportedName(node) {
-                    if (node.kind !== 69 && node.flags & 512) {
-                        return;
-                    }
-                    if (started) {
-                        write(",");
-                    }
-                    else {
-                        started = true;
-                    }
-                    writeLine();
-                    write("'");
-                    if (node.kind === 69) {
-                        emitNodeWithCommentsAndWithoutSourcemap(node);
-                    }
-                    else {
-                        emitDeclarationName(node);
-                    }
-                    write("': true");
-                }
-            }
-            function processTopLevelVariableAndFunctionDeclarations(node) {
-                var hoistedVars;
-                var hoistedFunctionDeclarations;
-                var exportedDeclarations;
-                visit(node);
-                if (hoistedVars) {
-                    writeLine();
-                    write("var ");
-                    var seen = {};
-                    for (var i = 0; i < hoistedVars.length; i++) {
-                        var local = hoistedVars[i];
-                        var name_31 = local.kind === 69
-                            ? local
-                            : local.name;
-                        if (name_31) {
-                            var text = ts.unescapeIdentifier(name_31.text);
-                            if (ts.hasProperty(seen, text)) {
-                                continue;
-                            }
-                            else {
-                                seen[text] = text;
-                            }
-                        }
-                        if (i !== 0) {
-                            write(", ");
-                        }
-                        if (local.kind === 221 || local.kind === 225 || local.kind === 224) {
-                            emitDeclarationName(local);
-                        }
-                        else {
-                            emit(local);
-                        }
-                        var flags = ts.getCombinedNodeFlags(local.kind === 69 ? local.parent : local);
-                        if (flags & 1) {
-                            if (!exportedDeclarations) {
-                                exportedDeclarations = [];
-                            }
-                            exportedDeclarations.push(local);
-                        }
-                    }
-                    write(";");
-                }
-                if (hoistedFunctionDeclarations) {
-                    for (var _a = 0, hoistedFunctionDeclarations_1 = hoistedFunctionDeclarations; _a < hoistedFunctionDeclarations_1.length; _a++) {
-                        var f = hoistedFunctionDeclarations_1[_a];
-                        writeLine();
-                        emit(f);
-                        if (f.flags & 1) {
-                            if (!exportedDeclarations) {
-                                exportedDeclarations = [];
-                            }
-                            exportedDeclarations.push(f);
-                        }
-                    }
-                }
-                return exportedDeclarations;
-                function visit(node) {
-                    if (node.flags & 2) {
-                        return;
-                    }
-                    if (node.kind === 220) {
-                        if (!hoistedFunctionDeclarations) {
-                            hoistedFunctionDeclarations = [];
-                        }
-                        hoistedFunctionDeclarations.push(node);
-                        return;
-                    }
-                    if (node.kind === 221) {
-                        if (!hoistedVars) {
-                            hoistedVars = [];
-                        }
-                        hoistedVars.push(node);
-                        return;
-                    }
-                    if (node.kind === 224) {
-                        if (shouldEmitEnumDeclaration(node)) {
-                            if (!hoistedVars) {
-                                hoistedVars = [];
-                            }
-                            hoistedVars.push(node);
-                        }
-                        return;
-                    }
-                    if (node.kind === 225) {
-                        if (shouldEmitModuleDeclaration(node)) {
-                            if (!hoistedVars) {
-                                hoistedVars = [];
-                            }
-                            hoistedVars.push(node);
-                        }
-                        return;
-                    }
-                    if (node.kind === 218 || node.kind === 169) {
-                        if (shouldHoistVariable(node, false)) {
-                            var name_32 = node.name;
-                            if (name_32.kind === 69) {
-                                if (!hoistedVars) {
-                                    hoistedVars = [];
-                                }
-                                hoistedVars.push(name_32);
-                            }
-                            else {
-                                ts.forEachChild(name_32, visit);
-                            }
-                        }
-                        return;
-                    }
-                    if (ts.isInternalModuleImportEqualsDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
-                        if (!hoistedVars) {
-                            hoistedVars = [];
-                        }
-                        hoistedVars.push(node.name);
-                        return;
-                    }
-                    if (ts.isBindingPattern(node)) {
-                        ts.forEach(node.elements, visit);
-                        return;
-                    }
-                    if (!ts.isDeclaration(node)) {
-                        ts.forEachChild(node, visit);
-                    }
-                }
-            }
-            function shouldHoistVariable(node, checkIfSourceFileLevelDecl) {
-                if (checkIfSourceFileLevelDecl && !shouldHoistDeclarationInSystemJsModule(node)) {
-                    return false;
-                }
-                return (ts.getCombinedNodeFlags(node) & 3072) === 0 ||
-                    ts.getEnclosingBlockScopeContainer(node).kind === 256;
-            }
-            function isCurrentFileSystemExternalModule() {
-                return modulekind === ts.ModuleKind.System && isCurrentFileExternalModule;
-            }
-            function emitSystemModuleBody(node, dependencyGroups, startIndex) {
-                emitVariableDeclarationsForImports();
-                writeLine();
-                var exportedDeclarations = processTopLevelVariableAndFunctionDeclarations(node);
-                var exportStarFunction = emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations);
-                writeLine();
-                write("return {");
-                increaseIndent();
-                writeLine();
-                emitSetters(exportStarFunction, dependencyGroups);
-                writeLine();
-                emitExecute(node, startIndex);
-                decreaseIndent();
-                writeLine();
-                write("}");
-                emitTempDeclarations(true);
-            }
-            function emitSetters(exportStarFunction, dependencyGroups) {
-                write("setters:[");
-                for (var i = 0; i < dependencyGroups.length; i++) {
-                    if (i !== 0) {
-                        write(",");
-                    }
-                    writeLine();
-                    increaseIndent();
-                    var group = dependencyGroups[i];
-                    var parameterName = makeUniqueName(ts.forEach(group, getLocalNameForExternalImport) || "");
-                    write("function (" + parameterName + ") {");
-                    increaseIndent();
-                    for (var _a = 0, group_1 = group; _a < group_1.length; _a++) {
-                        var entry = group_1[_a];
-                        var importVariableName = getLocalNameForExternalImport(entry) || "";
-                        switch (entry.kind) {
-                            case 230:
-                                if (!entry.importClause) {
-                                    break;
-                                }
-                            case 229:
-                                ts.Debug.assert(importVariableName !== "");
-                                writeLine();
-                                write(importVariableName + " = " + parameterName + ";");
-                                writeLine();
-                                break;
-                            case 236:
-                                ts.Debug.assert(importVariableName !== "");
-                                if (entry.exportClause) {
-                                    writeLine();
-                                    write(exportFunctionForFile + "({");
-                                    writeLine();
-                                    increaseIndent();
-                                    for (var i_1 = 0, len = entry.exportClause.elements.length; i_1 < len; i_1++) {
-                                        if (i_1 !== 0) {
-                                            write(",");
-                                            writeLine();
-                                        }
-                                        var e = entry.exportClause.elements[i_1];
-                                        write("\"");
-                                        emitNodeWithCommentsAndWithoutSourcemap(e.name);
-                                        write("\": " + parameterName + "[\"");
-                                        emitNodeWithCommentsAndWithoutSourcemap(e.propertyName || e.name);
-                                        write("\"]");
-                                    }
-                                    decreaseIndent();
-                                    writeLine();
-                                    write("});");
-                                }
-                                else {
-                                    writeLine();
-                                    write(exportStarFunction + "(" + parameterName + ");");
-                                }
-                                writeLine();
-                                break;
-                        }
-                    }
-                    decreaseIndent();
-                    write("}");
-                    decreaseIndent();
-                }
-                write("],");
-            }
-            function emitExecute(node, startIndex) {
-                write("execute: function() {");
-                increaseIndent();
-                writeLine();
-                for (var i = startIndex; i < node.statements.length; i++) {
-                    var statement = node.statements[i];
-                    switch (statement.kind) {
-                        case 220:
-                        case 230:
-                            continue;
-                        case 236:
-                            if (!statement.moduleSpecifier) {
-                                for (var _a = 0, _b = statement.exportClause.elements; _a < _b.length; _a++) {
-                                    var element = _b[_a];
-                                    emitExportSpecifierInSystemModule(element);
-                                }
-                            }
-                            continue;
-                        case 229:
-                            if (!ts.isInternalModuleImportEqualsDeclaration(statement)) {
-                                continue;
-                            }
-                        default:
-                            writeLine();
-                            emit(statement);
-                    }
-                }
-                decreaseIndent();
-                writeLine();
-                write("}");
-            }
-            function writeModuleName(node, emitRelativePathAsModuleName) {
-                var moduleName = node.moduleName;
-                if (moduleName || (emitRelativePathAsModuleName && (moduleName = getResolvedExternalModuleName(host, node)))) {
-                    write("\"" + moduleName + "\", ");
-                }
-            }
-            function emitSystemModule(node, emitRelativePathAsModuleName) {
-                collectExternalModuleInfo(node);
-                ts.Debug.assert(!exportFunctionForFile);
-                exportFunctionForFile = makeUniqueName("exports");
-                contextObjectForFile = makeUniqueName("context");
-                writeLine();
-                write("System.register(");
-                writeModuleName(node, emitRelativePathAsModuleName);
-                write("[");
-                var groupIndices = {};
-                var dependencyGroups = [];
-                for (var i = 0; i < externalImports.length; i++) {
-                    var text = getExternalModuleNameText(externalImports[i], emitRelativePathAsModuleName);
-                    if (text === undefined) {
-                        continue;
-                    }
-                    var key = text.substr(1, text.length - 2);
-                    if (ts.hasProperty(groupIndices, key)) {
-                        var groupIndex = groupIndices[key];
-                        dependencyGroups[groupIndex].push(externalImports[i]);
-                        continue;
-                    }
-                    else {
-                        groupIndices[key] = dependencyGroups.length;
-                        dependencyGroups.push([externalImports[i]]);
-                    }
-                    if (i !== 0) {
-                        write(", ");
-                    }
-                    write(text);
-                }
-                write("], function(" + exportFunctionForFile + ", " + contextObjectForFile + ") {");
-                writeLine();
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
-                writeLine();
-                write("var __moduleName = " + contextObjectForFile + " && " + contextObjectForFile + ".id;");
-                writeLine();
-                emitEmitHelpers(node);
-                emitCaptureThisForNodeIfNecessary(node);
-                emitSystemModuleBody(node, dependencyGroups, startIndex);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
-                var aliasedModuleNames = [];
-                var unaliasedModuleNames = [];
-                var importAliasNames = [];
-                for (var _a = 0, _b = node.amdDependencies; _a < _b.length; _a++) {
-                    var amdDependency = _b[_a];
-                    if (amdDependency.name) {
-                        aliasedModuleNames.push('"' + amdDependency.path + '"');
-                        importAliasNames.push(amdDependency.name);
-                    }
-                    else {
-                        unaliasedModuleNames.push('"' + amdDependency.path + '"');
-                    }
-                }
-                for (var _c = 0, externalImports_4 = externalImports; _c < externalImports_4.length; _c++) {
-                    var importNode = externalImports_4[_c];
-                    var externalModuleName = getExternalModuleNameText(importNode, emitRelativePathAsModuleName);
-                    var importAliasName = getLocalNameForExternalImport(importNode);
-                    if (includeNonAmdDependencies && importAliasName) {
-                        aliasedModuleNames.push(externalModuleName);
-                        importAliasNames.push(importAliasName);
-                    }
-                    else {
-                        unaliasedModuleNames.push(externalModuleName);
-                    }
-                }
-                return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
-            }
-            function emitAMDDependencies(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
-                var dependencyNames = getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName);
-                emitAMDDependencyList(dependencyNames);
-                write(", ");
-                emitAMDFactoryHeader(dependencyNames);
-            }
-            function emitAMDDependencyList(_a) {
-                var aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames;
-                write('["require", "exports"');
-                if (aliasedModuleNames.length) {
-                    write(", ");
-                    write(aliasedModuleNames.join(", "));
-                }
-                if (unaliasedModuleNames.length) {
-                    write(", ");
-                    write(unaliasedModuleNames.join(", "));
-                }
-                write("]");
-            }
-            function emitAMDFactoryHeader(_a) {
-                var importAliasNames = _a.importAliasNames;
-                write("function (require, exports");
-                if (importAliasNames.length) {
-                    write(", ");
-                    write(importAliasNames.join(", "));
-                }
-                write(") {");
-            }
-            function emitAMDModule(node, emitRelativePathAsModuleName) {
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                writeLine();
-                write("define(");
-                writeModuleName(node, emitRelativePathAsModuleName);
-                emitAMDDependencies(node, true, emitRelativePathAsModuleName);
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(true);
-                emitTempDeclarations(true);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function emitCommonJSModule(node) {
-                var startIndex = emitDirectivePrologues(node.statements, false, !compilerOptions.noImplicitUseStrict);
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(false);
-                emitTempDeclarations(true);
-            }
-            function emitUMDModule(node) {
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                var dependencyNames = getAMDDependencyNames(node, false);
-                writeLines("(function (factory) {\n    if (typeof module === 'object' && typeof module.exports === 'object') {\n        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n    }\n    else if (typeof define === 'function' && define.amd) {\n        define(");
-                emitAMDDependencyList(dependencyNames);
-                write(", factory);");
-                writeLines("    }\n})(");
-                emitAMDFactoryHeader(dependencyNames);
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(true);
-                emitTempDeclarations(true);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function emitES6Module(node) {
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                var startIndex = emitDirectivePrologues(node.statements, false);
-                emitEmitHelpers(node);
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitTempDeclarations(true);
-            }
-            function emitExportEquals(emitAsReturn) {
-                if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) {
-                    writeLine();
-                    emitStart(exportEquals);
-                    write(emitAsReturn ? "return " : "module.exports = ");
-                    emit(exportEquals.expression);
-                    write(";");
-                    emitEnd(exportEquals);
-                }
-            }
-            function emitJsxElement(node) {
-                switch (compilerOptions.jsx) {
-                    case 2:
-                        jsxEmitReact(node);
-                        break;
-                    case 1:
-                    default:
-                        jsxEmitPreserve(node);
-                        break;
-                }
-            }
-            function trimReactWhitespaceAndApplyEntities(node) {
-                var result = undefined;
-                var text = ts.getTextOfNode(node, true);
-                var firstNonWhitespace = 0;
-                var lastNonWhitespace = -1;
-                for (var i = 0; i < text.length; i++) {
-                    var c = text.charCodeAt(i);
-                    if (ts.isLineBreak(c)) {
-                        if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) {
-                            var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1);
-                            result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
-                        }
-                        firstNonWhitespace = -1;
-                    }
-                    else if (!ts.isWhiteSpace(c)) {
-                        lastNonWhitespace = i;
-                        if (firstNonWhitespace === -1) {
-                            firstNonWhitespace = i;
-                        }
-                    }
-                }
-                if (firstNonWhitespace !== -1) {
-                    var part = text.substr(firstNonWhitespace);
-                    result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
-                }
-                if (result) {
-                    result = result.replace(/&(\w+);/g, function (s, m) {
-                        if (entities[m] !== undefined) {
-                            var ch = String.fromCharCode(entities[m]);
-                            return ch === '"' ? "\\\"" : ch;
-                        }
-                        else {
-                            return s;
-                        }
-                    });
-                }
-                return result;
-            }
-            function isJsxChildEmittable(child) {
-                if (child.kind === 248) {
-                    return !!child.expression;
-                }
-                else if (child.kind === 244) {
-                    return !!getTextToEmit(child);
-                }
-                return true;
-            }
-            ;
-            function getTextToEmit(node) {
-                switch (compilerOptions.jsx) {
-                    case 2:
-                        var text = trimReactWhitespaceAndApplyEntities(node);
-                        if (text === undefined || text.length === 0) {
-                            return undefined;
-                        }
-                        else {
-                            return text;
-                        }
-                    case 1:
-                    default:
-                        return ts.getTextOfNode(node, true);
-                }
-            }
-            function emitJsxText(node) {
-                switch (compilerOptions.jsx) {
-                    case 2:
-                        write('"');
-                        write(trimReactWhitespaceAndApplyEntities(node));
-                        write('"');
-                        break;
-                    case 1:
-                    default:
-                        writer.writeLiteral(ts.getTextOfNode(node, true));
-                        break;
-                }
-            }
-            function emitJsxExpression(node) {
-                if (node.expression) {
-                    switch (compilerOptions.jsx) {
-                        case 1:
-                        default:
-                            write("{");
-                            emit(node.expression);
-                            write("}");
-                            break;
-                        case 2:
-                            emit(node.expression);
-                            break;
-                    }
-                }
-            }
-            function isUseStrictPrologue(node) {
-                return node.expression.text === "use strict";
-            }
-            function ensureUseStrictPrologue(startWithNewLine, writeUseStrict) {
-                if (writeUseStrict) {
-                    if (startWithNewLine) {
-                        writeLine();
-                    }
-                    write("\"use strict\";");
-                }
-            }
-            function emitDirectivePrologues(statements, startWithNewLine, ensureUseStrict) {
-                var foundUseStrict = false;
-                for (var i = 0; i < statements.length; i++) {
-                    if (ts.isPrologueDirective(statements[i])) {
-                        if (isUseStrictPrologue(statements[i])) {
-                            foundUseStrict = true;
-                        }
-                        if (startWithNewLine || i > 0) {
-                            writeLine();
-                        }
-                        emit(statements[i]);
-                    }
-                    else {
-                        ensureUseStrictPrologue(startWithNewLine || i > 0, !foundUseStrict && ensureUseStrict);
-                        return i;
-                    }
-                }
-                ensureUseStrictPrologue(startWithNewLine, !foundUseStrict && ensureUseStrict);
-                return statements.length;
-            }
-            function writeLines(text) {
-                var lines = text.split(/\r\n|\r|\n/g);
-                for (var i = 0; i < lines.length; i++) {
-                    var line = lines[i];
-                    if (line.length) {
-                        writeLine();
-                        write(line);
-                    }
-                }
-            }
-            function emitEmitHelpers(node) {
-                if (!compilerOptions.noEmitHelpers) {
-                    if (languageVersion < 2 && !extendsEmitted && node.flags & 262144) {
-                        writeLines(extendsHelper);
-                        extendsEmitted = true;
-                    }
-                    if (compilerOptions.jsx !== 1 && !assignEmitted && (node.flags & 1073741824)) {
-                        writeLines(assignHelper);
-                        assignEmitted = true;
-                    }
-                    if (!decorateEmitted && node.flags & 524288) {
-                        writeLines(decorateHelper);
-                        if (compilerOptions.emitDecoratorMetadata) {
-                            writeLines(metadataHelper);
-                        }
-                        decorateEmitted = true;
-                    }
-                    if (!paramEmitted && node.flags & 1048576) {
-                        writeLines(paramHelper);
-                        paramEmitted = true;
-                    }
-                    if (!awaiterEmitted && node.flags & 2097152) {
-                        writeLines(awaiterHelper);
-                        awaiterEmitted = true;
-                    }
-                }
-            }
-            function emitSourceFileNode(node) {
-                writeLine();
-                emitShebang();
-                emitDetachedCommentsAndUpdateCommentsInfo(node);
-                if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
-                    if (isOwnFileEmit || (!ts.isExternalModule(node) && compilerOptions.isolatedModules)) {
-                        var emitModule = moduleEmitDelegates[modulekind] || moduleEmitDelegates[ts.ModuleKind.CommonJS];
-                        emitModule(node);
-                    }
-                    else {
-                        bundleEmitDelegates[modulekind](node, true);
-                    }
-                }
-                else {
-                    var startIndex = emitDirectivePrologues(node.statements, false);
-                    externalImports = undefined;
-                    exportSpecifiers = undefined;
-                    exportEquals = undefined;
-                    hasExportStarsToExportValues = false;
-                    emitEmitHelpers(node);
-                    emitCaptureThisForNodeIfNecessary(node);
-                    emitLinesStartingAt(node.statements, startIndex);
-                    emitTempDeclarations(true);
-                }
-                emitLeadingComments(node.endOfFileToken);
-            }
-            function emit(node) {
-                emitNodeConsideringCommentsOption(node, emitNodeWithSourceMap);
-            }
-            function emitNodeWithCommentsAndWithoutSourcemap(node) {
-                emitNodeConsideringCommentsOption(node, emitNodeWithoutSourceMap);
-            }
-            function emitNodeConsideringCommentsOption(node, emitNodeConsideringSourcemap) {
-                if (node) {
-                    if (node.flags & 2) {
-                        return emitCommentsOnNotEmittedNode(node);
-                    }
-                    if (isSpecializedCommentHandling(node)) {
-                        return emitNodeWithoutSourceMap(node);
-                    }
-                    var emitComments_1 = shouldEmitLeadingAndTrailingComments(node);
-                    if (emitComments_1) {
-                        emitLeadingComments(node);
-                    }
-                    emitNodeConsideringSourcemap(node);
-                    if (emitComments_1) {
-                        emitTrailingComments(node);
-                    }
-                }
-            }
-            function emitNodeWithSourceMap(node) {
-                if (node) {
-                    emitStart(node);
-                    emitNodeWithoutSourceMap(node);
-                    emitEnd(node);
-                }
-            }
-            function emitNodeWithoutSourceMap(node) {
-                if (node) {
-                    emitJavaScriptWorker(node);
-                }
-            }
-            function changeSourceMapEmit(writer) {
-                sourceMap = writer;
-                emitStart = writer.emitStart;
-                emitEnd = writer.emitEnd;
-                emitPos = writer.emitPos;
-                setSourceFile = writer.setSourceFile;
-            }
-            function withTemporaryNoSourceMap(callback) {
-                var prevSourceMap = sourceMap;
-                setSourceMapWriterEmit(ts.getNullSourceMapWriter());
-                callback();
-                setSourceMapWriterEmit(prevSourceMap);
-            }
-            function isSpecializedCommentHandling(node) {
-                switch (node.kind) {
-                    case 222:
-                    case 220:
-                    case 230:
-                    case 229:
-                    case 223:
-                    case 235:
-                        return true;
-                }
-            }
-            function shouldEmitLeadingAndTrailingComments(node) {
-                switch (node.kind) {
-                    case 200:
-                        return shouldEmitLeadingAndTrailingCommentsForVariableStatement(node);
-                    case 225:
-                        return shouldEmitModuleDeclaration(node);
-                    case 224:
-                        return shouldEmitEnumDeclaration(node);
-                }
-                ts.Debug.assert(!isSpecializedCommentHandling(node));
-                if (node.kind !== 199 &&
-                    node.parent &&
-                    node.parent.kind === 180 &&
-                    node.parent.body === node &&
-                    languageVersion <= 1) {
-                    return false;
-                }
-                return true;
-            }
-            function emitJavaScriptWorker(node) {
-                switch (node.kind) {
-                    case 69:
-                        return emitIdentifier(node);
-                    case 142:
-                        return emitParameter(node);
-                    case 147:
-                    case 146:
-                        return emitMethod(node);
-                    case 149:
-                    case 150:
-                        return emitAccessor(node);
-                    case 97:
-                        return emitThis(node);
-                    case 95:
-                        return emitSuper(node);
-                    case 93:
-                        return write("null");
-                    case 99:
-                        return write("true");
-                    case 84:
-                        return write("false");
-                    case 8:
-                    case 9:
-                    case 10:
-                    case 11:
-                    case 12:
-                    case 13:
-                    case 14:
-                        return emitLiteral(node);
-                    case 189:
-                        return emitTemplateExpression(node);
-                    case 197:
-                        return emitTemplateSpan(node);
-                    case 241:
-                    case 242:
-                        return emitJsxElement(node);
-                    case 244:
-                        return emitJsxText(node);
-                    case 248:
-                        return emitJsxExpression(node);
-                    case 139:
-                        return emitQualifiedName(node);
-                    case 167:
-                        return emitObjectBindingPattern(node);
-                    case 168:
-                        return emitArrayBindingPattern(node);
-                    case 169:
-                        return emitBindingElement(node);
-                    case 170:
-                        return emitArrayLiteral(node);
-                    case 171:
-                        return emitObjectLiteral(node);
-                    case 253:
-                        return emitPropertyAssignment(node);
-                    case 254:
-                        return emitShorthandPropertyAssignment(node);
-                    case 140:
-                        return emitComputedPropertyName(node);
-                    case 172:
-                        return emitPropertyAccess(node);
-                    case 173:
-                        return emitIndexedAccess(node);
-                    case 174:
-                        return emitCallExpression(node);
-                    case 175:
-                        return emitNewExpression(node);
-                    case 176:
-                        return emitTaggedTemplateExpression(node);
-                    case 177:
-                    case 195:
-                    case 196:
-                        return emit(node.expression);
-                    case 178:
-                        return emitParenExpression(node);
-                    case 220:
-                    case 179:
-                    case 180:
-                        return emitFunctionDeclaration(node);
-                    case 181:
-                        return emitDeleteExpression(node);
-                    case 182:
-                        return emitTypeOfExpression(node);
-                    case 183:
-                        return emitVoidExpression(node);
-                    case 184:
-                        return emitAwaitExpression(node);
-                    case 185:
-                        return emitPrefixUnaryExpression(node);
-                    case 186:
-                        return emitPostfixUnaryExpression(node);
-                    case 187:
-                        return emitBinaryExpression(node);
-                    case 188:
-                        return emitConditionalExpression(node);
-                    case 191:
-                        return emitSpreadElementExpression(node);
-                    case 190:
-                        return emitYieldExpression(node);
-                    case 193:
-                        return;
-                    case 199:
-                    case 226:
-                        return emitBlock(node);
-                    case 200:
-                        return emitVariableStatement(node);
-                    case 201:
-                        return write(";");
-                    case 202:
-                        return emitExpressionStatement(node);
-                    case 203:
-                        return emitIfStatement(node);
-                    case 204:
-                        return emitDoStatement(node);
-                    case 205:
-                        return emitWhileStatement(node);
-                    case 206:
-                        return emitForStatement(node);
-                    case 208:
-                    case 207:
-                        return emitForInOrForOfStatement(node);
-                    case 209:
-                    case 210:
-                        return emitBreakOrContinueStatement(node);
-                    case 211:
-                        return emitReturnStatement(node);
-                    case 212:
-                        return emitWithStatement(node);
-                    case 213:
-                        return emitSwitchStatement(node);
-                    case 249:
-                    case 250:
-                        return emitCaseOrDefaultClause(node);
-                    case 214:
-                        return emitLabeledStatement(node);
-                    case 215:
-                        return emitThrowStatement(node);
-                    case 216:
-                        return emitTryStatement(node);
-                    case 252:
-                        return emitCatchClause(node);
-                    case 217:
-                        return emitDebuggerStatement(node);
-                    case 218:
-                        return emitVariableDeclaration(node);
-                    case 192:
-                        return emitClassExpression(node);
-                    case 221:
-                        return emitClassDeclaration(node);
-                    case 222:
-                        return emitInterfaceDeclaration(node);
-                    case 224:
-                        return emitEnumDeclaration(node);
-                    case 255:
-                        return emitEnumMember(node);
-                    case 225:
-                        return emitModuleDeclaration(node);
-                    case 230:
-                        return emitImportDeclaration(node);
-                    case 229:
-                        return emitImportEqualsDeclaration(node);
-                    case 236:
-                        return emitExportDeclaration(node);
-                    case 235:
-                        return emitExportAssignment(node);
-                    case 256:
-                        return emitSourceFileNode(node);
-                }
-            }
-            function hasDetachedComments(pos) {
-                return detachedCommentsInfo !== undefined && ts.lastOrUndefined(detachedCommentsInfo).nodePos === pos;
-            }
-            function getLeadingCommentsWithoutDetachedComments() {
-                var leadingComments = ts.getLeadingCommentRanges(currentText, ts.lastOrUndefined(detachedCommentsInfo).detachedCommentEndPos);
-                if (detachedCommentsInfo.length - 1) {
-                    detachedCommentsInfo.pop();
-                }
-                else {
-                    detachedCommentsInfo = undefined;
-                }
-                return leadingComments;
-            }
-            function isTripleSlashComment(comment) {
-                if (currentText.charCodeAt(comment.pos + 1) === 47 &&
-                    comment.pos + 2 < comment.end &&
-                    currentText.charCodeAt(comment.pos + 2) === 47) {
-                    var textSubStr = currentText.substring(comment.pos, comment.end);
-                    return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) ||
-                        textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ?
-                        true : false;
-                }
-                return false;
-            }
-            function getLeadingCommentsToEmit(node) {
-                if (node.parent) {
-                    if (node.parent.kind === 256 || node.pos !== node.parent.pos) {
-                        if (hasDetachedComments(node.pos)) {
-                            return getLeadingCommentsWithoutDetachedComments();
-                        }
-                        else {
-                            return ts.getLeadingCommentRangesOfNodeFromText(node, currentText);
-                        }
-                    }
-                }
-            }
-            function getTrailingCommentsToEmit(node) {
-                if (node.parent) {
-                    if (node.parent.kind === 256 || node.end !== node.parent.end) {
-                        return ts.getTrailingCommentRanges(currentText, node.end);
-                    }
-                }
-            }
-            function emitCommentsOnNotEmittedNode(node) {
-                emitLeadingCommentsWorker(node, false);
-            }
-            function emitLeadingComments(node) {
-                return emitLeadingCommentsWorker(node, true);
-            }
-            function emitLeadingCommentsWorker(node, isEmittedNode) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var leadingComments;
-                if (isEmittedNode) {
-                    leadingComments = getLeadingCommentsToEmit(node);
-                }
-                else {
-                    if (node.pos === 0) {
-                        leadingComments = ts.filter(getLeadingCommentsToEmit(node), isTripleSlashComment);
-                    }
-                }
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, node, leadingComments);
-                ts.emitComments(currentText, currentLineMap, writer, leadingComments, true, newLine, writeComment);
-            }
-            function emitTrailingComments(node) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var trailingComments = getTrailingCommentsToEmit(node);
-                ts.emitComments(currentText, currentLineMap, writer, trailingComments, false, newLine, writeComment);
-            }
-            function emitTrailingCommentsOfPosition(pos) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var trailingComments = ts.getTrailingCommentRanges(currentText, pos);
-                ts.emitComments(currentText, currentLineMap, writer, trailingComments, true, newLine, writeComment);
-            }
-            function emitLeadingCommentsOfPositionWorker(pos) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var leadingComments;
-                if (hasDetachedComments(pos)) {
-                    leadingComments = getLeadingCommentsWithoutDetachedComments();
-                }
-                else {
-                    leadingComments = ts.getLeadingCommentRanges(currentText, pos);
-                }
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, { pos: pos, end: pos }, leadingComments);
-                ts.emitComments(currentText, currentLineMap, writer, leadingComments, true, newLine, writeComment);
-            }
-            function emitDetachedCommentsAndUpdateCommentsInfo(node) {
-                var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, node, newLine, compilerOptions.removeComments);
-                if (currentDetachedCommentInfo) {
-                    if (detachedCommentsInfo) {
-                        detachedCommentsInfo.push(currentDetachedCommentInfo);
-                    }
-                    else {
-                        detachedCommentsInfo = [currentDetachedCommentInfo];
-                    }
-                }
-            }
-            function writeComment(text, lineMap, writer, comment, newLine) {
-                emitPos(comment.pos);
-                ts.writeCommentRange(text, lineMap, writer, comment, newLine);
-                emitPos(comment.end);
-            }
-            function emitShebang() {
-                var shebang = ts.getShebang(currentText);
-                if (shebang) {
-                    write(shebang);
-                    writeLine();
-                }
-            }
-            var _a, _b;
-        }
-        function emitFile(_a, sourceFiles, isBundledEmit) {
-            var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath;
-            if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
-                emitJavaScript(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
-            }
-            else {
-                emitSkipped = true;
-            }
-            if (declarationFilePath) {
-                emitSkipped = ts.writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) || emitSkipped;
-            }
-            if (!emitSkipped && emittedFilesList) {
-                emittedFilesList.push(jsFilePath);
-                if (sourceMapFilePath) {
-                    emittedFilesList.push(sourceMapFilePath);
-                }
-                if (declarationFilePath) {
-                    emittedFilesList.push(declarationFilePath);
-                }
-            }
-        }
-    }
-    ts.emitFiles = emitFiles;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.programTime = 0;
-    ts.emitTime = 0;
-    ts.ioReadTime = 0;
-    ts.ioWriteTime = 0;
-    var emptyArray = [];
-    var defaultLibrarySearchPaths = [
-        "types/",
-        "node_modules/",
-        "node_modules/@types/",
-    ];
-    ts.version = "1.9.0";
-    function findConfigFile(searchPath, fileExists) {
-        while (true) {
-            var fileName = ts.combinePaths(searchPath, "tsconfig.json");
-            if (fileExists(fileName)) {
-                return fileName;
-            }
-            var parentPath = ts.getDirectoryPath(searchPath);
-            if (parentPath === searchPath) {
-                break;
-            }
-            searchPath = parentPath;
-        }
-        return undefined;
-    }
-    ts.findConfigFile = findConfigFile;
-    function resolveTripleslashReference(moduleName, containingFile) {
-        var basePath = ts.getDirectoryPath(containingFile);
-        var referencedFileName = ts.isRootedDiskPath(moduleName) ? moduleName : ts.combinePaths(basePath, moduleName);
-        return ts.normalizePath(referencedFileName);
-    }
-    ts.resolveTripleslashReference = resolveTripleslashReference;
-    function computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName) {
-        var commonPathComponents;
-        var failed = ts.forEach(fileNames, function (sourceFile) {
-            var sourcePathComponents = ts.getNormalizedPathComponents(sourceFile, currentDirectory);
-            sourcePathComponents.pop();
-            if (!commonPathComponents) {
-                commonPathComponents = sourcePathComponents;
-                return;
-            }
-            for (var i = 0, n = Math.min(commonPathComponents.length, sourcePathComponents.length); i < n; i++) {
-                if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
-                    if (i === 0) {
-                        return true;
-                    }
-                    commonPathComponents.length = i;
-                    break;
-                }
-            }
-            if (sourcePathComponents.length < commonPathComponents.length) {
-                commonPathComponents.length = sourcePathComponents.length;
-            }
-        });
-        if (failed) {
-            return "";
-        }
-        if (!commonPathComponents) {
-            return currentDirectory;
-        }
-        return ts.getNormalizedPathFromPathComponents(commonPathComponents);
-    }
-    ts.computeCommonSourceDirectoryOfFilenames = computeCommonSourceDirectoryOfFilenames;
-    function trace(host, message) {
-        host.trace(ts.formatMessage.apply(undefined, arguments));
-    }
-    function isTraceEnabled(compilerOptions, host) {
-        return compilerOptions.traceResolution && host.trace !== undefined;
-    }
-    function hasZeroOrOneAsteriskCharacter(str) {
-        var seenAsterisk = false;
-        for (var i = 0; i < str.length; i++) {
-            if (str.charCodeAt(i) === 42) {
-                if (!seenAsterisk) {
-                    seenAsterisk = true;
-                }
-                else {
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-    function createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations) {
-        return { resolvedModule: resolvedFileName ? { resolvedFileName: resolvedFileName, isExternalLibraryImport: isExternalLibraryImport } : undefined, failedLookupLocations: failedLookupLocations };
-    }
-    function moduleHasNonRelativeName(moduleName) {
-        if (ts.isRootedDiskPath(moduleName)) {
-            return false;
-        }
-        var i = moduleName.lastIndexOf("./", 1);
-        var startsWithDotSlashOrDotDotSlash = i === 0 || (i === 1 && moduleName.charCodeAt(0) === 46);
-        return !startsWithDotSlashOrDotDotSlash;
-    }
-    function tryReadTypesSection(packageJsonPath, baseDirectory, state) {
-        var jsonContent;
-        try {
-            var jsonText = state.host.readFile(packageJsonPath);
-            jsonContent = jsonText ? JSON.parse(jsonText) : {};
-        }
-        catch (e) {
-            jsonContent = {};
-        }
-        var typesFile;
-        var fieldName;
-        if (jsonContent.typings) {
-            if (typeof jsonContent.typings === "string") {
-                fieldName = "typings";
-                typesFile = jsonContent.typings;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "typings", typeof jsonContent.typings);
-                }
-            }
-        }
-        if (!typesFile && jsonContent.types) {
-            if (typeof jsonContent.types === "string") {
-                fieldName = "types";
-                typesFile = jsonContent.types;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "types", typeof jsonContent.types);
-                }
-            }
-        }
-        if (typesFile) {
-            var typesFilePath = ts.normalizePath(ts.combinePaths(baseDirectory, typesFile));
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, typesFile, typesFilePath);
-            }
-            return typesFilePath;
-        }
-        return undefined;
-    }
-    var typeReferenceExtensions = [".d.ts"];
-    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
-        var traceEnabled = isTraceEnabled(options, host);
-        var moduleResolutionState = {
-            compilerOptions: options,
-            host: host,
-            skipTsx: true,
-            traceEnabled: traceEnabled
-        };
-        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
-        if (traceEnabled) {
-            if (containingFile === undefined) {
-                if (rootDir === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, rootDir);
-                }
-            }
-            else {
-                if (rootDir === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, rootDir);
-                }
-            }
-        }
-        var failedLookupLocations = [];
-        if (rootDir !== undefined) {
-            var effectivePrimarySearchPaths = options.typesSearchPaths || defaultLibrarySearchPaths;
-            for (var _i = 0, effectivePrimarySearchPaths_1 = effectivePrimarySearchPaths; _i < effectivePrimarySearchPaths_1.length; _i++) {
-                var searchPath = effectivePrimarySearchPaths_1[_i];
-                var primaryPath = ts.combinePaths(rootDir, searchPath);
-                if (traceEnabled) {
-                    trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, primaryPath);
-                }
-                var candidate = ts.combinePaths(primaryPath, typeReferenceDirectiveName);
-                var candidateDirectory = ts.getDirectoryPath(candidate);
-                var resolvedFile_1 = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations, !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
-                if (resolvedFile_1) {
-                    if (traceEnabled) {
-                        trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile_1, true);
-                    }
-                    return {
-                        resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile_1 },
-                        failedLookupLocations: failedLookupLocations
-                    };
-                }
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
-            }
-        }
-        var resolvedFile;
-        var initialLocationForSecondaryLookup;
-        if (containingFile) {
-            initialLocationForSecondaryLookup = ts.getDirectoryPath(containingFile);
-        }
-        else {
-            initialLocationForSecondaryLookup = rootDir;
-        }
-        if (initialLocationForSecondaryLookup !== undefined) {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
-            }
-            resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState);
-            if (traceEnabled) {
-                if (resolvedFile) {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
-                }
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
-            }
-        }
-        return {
-            resolvedTypeReferenceDirective: resolvedFile
-                ? { primary: false, resolvedFileName: resolvedFile }
-                : undefined,
-            failedLookupLocations: failedLookupLocations
-        };
-    }
-    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
-    function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        if (traceEnabled) {
-            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
-        }
-        var moduleResolution = compilerOptions.moduleResolution;
-        if (moduleResolution === undefined) {
-            moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
-            }
-        }
-        var result;
-        switch (moduleResolution) {
-            case ts.ModuleResolutionKind.NodeJs:
-                result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-            case ts.ModuleResolutionKind.Classic:
-                result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-        }
-        if (traceEnabled) {
-            if (result.resolvedModule) {
-                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
-            }
-            else {
-                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
-            }
-        }
-        return result;
-    }
-    ts.resolveModuleName = resolveModuleName;
-    function tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (moduleHasNonRelativeName(moduleName)) {
-            return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
-        }
-        else {
-            return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
-        }
-    }
-    function tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.rootDirs) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
-        }
-        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-        var matchedRootDir;
-        var matchedNormalizedPrefix;
-        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
-            var rootDir = _a[_i];
-            var normalizedRoot = ts.normalizePath(rootDir);
-            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
-                normalizedRoot += ts.directorySeparator;
-            }
-            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
-                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
-            }
-            if (isLongestMatchingPrefix) {
-                matchedNormalizedPrefix = normalizedRoot;
-                matchedRootDir = rootDir;
-            }
-        }
-        if (matchedNormalizedPrefix) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
-            }
-            var suffix = candidate.substr(matchedNormalizedPrefix.length);
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
-            }
-            var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
-            if (resolvedFileName) {
-                return resolvedFileName;
-            }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
-            }
-            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
-                var rootDir = _c[_b];
-                if (rootDir === matchedRootDir) {
-                    continue;
-                }
-                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
-                }
-                var baseDirectory = ts.getDirectoryPath(candidate_1);
-                var resolvedFileName_1 = loader(candidate_1, supportedExtensions, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
-                if (resolvedFileName_1) {
-                    return resolvedFileName_1;
-                }
-            }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
-            }
-        }
-        return undefined;
-    }
-    function tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.baseUrl) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
-        }
-        var longestMatchPrefixLength = -1;
-        var matchedPattern;
-        var matchedStar;
-        if (state.compilerOptions.paths) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
-            }
-            for (var key in state.compilerOptions.paths) {
-                var pattern = key;
-                var indexOfStar = pattern.indexOf("*");
-                if (indexOfStar !== -1) {
-                    var prefix = pattern.substr(0, indexOfStar);
-                    var suffix = pattern.substr(indexOfStar + 1);
-                    if (moduleName.length >= prefix.length + suffix.length &&
-                        ts.startsWith(moduleName, prefix) &&
-                        ts.endsWith(moduleName, suffix)) {
-                        if (prefix.length > longestMatchPrefixLength) {
-                            longestMatchPrefixLength = prefix.length;
-                            matchedPattern = pattern;
-                            matchedStar = moduleName.substr(prefix.length, moduleName.length - suffix.length);
-                        }
-                    }
-                }
-                else if (pattern === moduleName) {
-                    matchedPattern = pattern;
-                    matchedStar = undefined;
-                    break;
-                }
-            }
-        }
-        if (matchedPattern) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPattern);
-            }
-            for (var _i = 0, _a = state.compilerOptions.paths[matchedPattern]; _i < _a.length; _i++) {
-                var subst = _a[_i];
-                var path = matchedStar ? subst.replace("\*", matchedStar) : subst;
-                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
-                }
-                var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
-                if (resolvedFileName) {
-                    return resolvedFileName;
-                }
-            }
-            return undefined;
-        }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
-            }
-            return loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
-        }
-    }
-    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var failedLookupLocations = [];
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: false };
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName, failedLookupLocations, supportedExtensions, state);
-        var isExternalLibraryImport = false;
-        if (!resolvedFileName) {
-            if (moduleHasNonRelativeName(moduleName)) {
-                if (traceEnabled) {
-                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
-                }
-                resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state);
-                isExternalLibraryImport = resolvedFileName !== undefined;
-            }
-            else {
-                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, false, state);
-            }
-        }
-        if (resolvedFileName && host.realpath) {
-            var originalFileName = resolvedFileName;
-            resolvedFileName = ts.normalizePath(host.realpath(resolvedFileName));
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
-            }
-        }
-        return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
-    }
-    ts.nodeModuleNameResolver = nodeModuleNameResolver;
-    function nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state) {
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
-        }
-        var resolvedFileName = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
-        return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
-    }
-    function directoryProbablyExists(directoryName, host) {
-        return !host.directoryExists || host.directoryExists(directoryName);
-    }
-    ts.directoryProbablyExists = directoryProbablyExists;
-    function loadModuleFromFile(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
-        if (!onlyRecordFailures) {
-            var directory = ts.getDirectoryPath(candidate);
-            if (directory) {
-                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
-            }
-        }
-        return ts.forEach(extensions, tryLoad);
-        function tryLoad(ext) {
-            if (ext === ".tsx" && state.skipTsx) {
-                return undefined;
-            }
-            var fileName = ts.fileExtensionIs(candidate, ext) ? candidate : candidate + ext;
-            if (!onlyRecordFailures && state.host.fileExists(fileName)) {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
-                }
-                return fileName;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
-                }
-                failedLookupLocation.push(fileName);
-                return undefined;
-            }
-        }
-    }
-    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocation, onlyRecordFailures, state) {
-        var packageJsonPath = ts.combinePaths(candidate, "package.json");
-        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
-        if (directoryExists && state.host.fileExists(packageJsonPath)) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
-            }
-            var typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
-            if (typesFile) {
-                var result = loadModuleFromFile(typesFile, extensions, failedLookupLocation, !directoryProbablyExists(ts.getDirectoryPath(typesFile), state.host), state);
-                if (result) {
-                    return result;
-                }
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.package_json_does_not_have_types_field);
-                }
-            }
-        }
-        else {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
-            }
-            failedLookupLocation.push(packageJsonPath);
-        }
-        return loadModuleFromFile(ts.combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
-    }
-    function loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) {
-        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
-        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
-        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
-        var result = loadModuleFromFile(candidate, ts.supportedTypeScriptExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
-        }
-        result = loadNodeModuleFromDirectory(ts.supportedTypeScriptExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
-        }
-    }
-    function loadModuleFromNodeModules(moduleName, directory, failedLookupLocations, state) {
-        directory = ts.normalizeSlashes(directory);
-        while (true) {
-            var baseName = ts.getBaseFileName(directory);
-            if (baseName !== "node_modules") {
-                var result = loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) ||
-                    loadModuleFromNodeModulesFolder(ts.combinePaths("@types", moduleName), directory, failedLookupLocations, state);
-                if (result) {
-                    return result;
-                }
-            }
-            var parentPath = ts.getDirectoryPath(directory);
-            if (parentPath === directory) {
-                break;
-            }
-            directory = parentPath;
-        }
-        return undefined;
-    }
-    function classicNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: !compilerOptions.jsx };
-        var failedLookupLocations = [];
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
-        if (resolvedFileName) {
-            return createResolvedModule(resolvedFileName, false, failedLookupLocations);
-        }
-        var referencedSourceFile;
-        if (moduleHasNonRelativeName(moduleName)) {
-            while (true) {
-                var searchName = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, false, state);
-                if (referencedSourceFile) {
-                    break;
-                }
-                var parentPath = ts.getDirectoryPath(containingDirectory);
-                if (parentPath === containingDirectory) {
-                    break;
-                }
-                containingDirectory = parentPath;
-            }
-        }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-            referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, false, state);
-        }
-        return referencedSourceFile
-            ? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations: failedLookupLocations }
-            : { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
-    }
-    ts.classicNameResolver = classicNameResolver;
-    ts.defaultInitCompilerOptions = {
-        module: ts.ModuleKind.CommonJS,
-        target: 1,
-        noImplicitAny: false,
-        sourceMap: false
-    };
-    function createCompilerHost(options, setParentNodes) {
-        var existingDirectories = {};
-        function getCanonicalFileName(fileName) {
-            return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
-        }
-        var unsupportedFileEncodingErrorCode = -2147024809;
-        function getSourceFile(fileName, languageVersion, onError) {
-            var text;
-            try {
-                var start = new Date().getTime();
-                text = ts.sys.readFile(fileName, options.charset);
-                ts.ioReadTime += new Date().getTime() - start;
-            }
-            catch (e) {
-                if (onError) {
-                    onError(e.number === unsupportedFileEncodingErrorCode
-                        ? ts.createCompilerDiagnostic(ts.Diagnostics.Unsupported_file_encoding).messageText
-                        : e.message);
-                }
-                text = "";
-            }
-            return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
-        }
-        function directoryExists(directoryPath) {
-            if (ts.hasProperty(existingDirectories, directoryPath)) {
-                return true;
-            }
-            if (ts.sys.directoryExists(directoryPath)) {
-                existingDirectories[directoryPath] = true;
-                return true;
-            }
-            return false;
-        }
-        function ensureDirectoriesExist(directoryPath) {
-            if (directoryPath.length > ts.getRootLength(directoryPath) && !directoryExists(directoryPath)) {
-                var parentDirectory = ts.getDirectoryPath(directoryPath);
-                ensureDirectoriesExist(parentDirectory);
-                ts.sys.createDirectory(directoryPath);
-            }
-        }
-        var outputFingerprints;
-        function writeFileIfUpdated(fileName, data, writeByteOrderMark) {
-            if (!outputFingerprints) {
-                outputFingerprints = {};
-            }
-            var hash = ts.sys.createHash(data);
-            var mtimeBefore = ts.sys.getModifiedTime(fileName);
-            if (mtimeBefore && ts.hasProperty(outputFingerprints, fileName)) {
-                var fingerprint = outputFingerprints[fileName];
-                if (fingerprint.byteOrderMark === writeByteOrderMark &&
-                    fingerprint.hash === hash &&
-                    fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
-                    return;
-                }
-            }
-            ts.sys.writeFile(fileName, data, writeByteOrderMark);
-            var mtimeAfter = ts.sys.getModifiedTime(fileName);
-            outputFingerprints[fileName] = {
-                hash: hash,
-                byteOrderMark: writeByteOrderMark,
-                mtime: mtimeAfter
-            };
-        }
-        function writeFile(fileName, data, writeByteOrderMark, onError) {
-            try {
-                var start = new Date().getTime();
-                ensureDirectoriesExist(ts.getDirectoryPath(ts.normalizePath(fileName)));
-                if (ts.isWatchSet(options) && ts.sys.createHash && ts.sys.getModifiedTime) {
-                    writeFileIfUpdated(fileName, data, writeByteOrderMark);
-                }
-                else {
-                    ts.sys.writeFile(fileName, data, writeByteOrderMark);
-                }
-                ts.ioWriteTime += new Date().getTime() - start;
-            }
-            catch (e) {
-                if (onError) {
-                    onError(e.message);
-                }
-            }
-        }
-        function getDefaultTypeDirectiveNames(rootPath) {
-            var localTypes = ts.combinePaths(rootPath, "types");
-            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
-            var result = [];
-            if (ts.sys.directoryExists(localTypes)) {
-                result = result.concat(ts.sys.getDirectories(localTypes));
-            }
-            if (ts.sys.directoryExists(npmTypes)) {
-                result = result.concat(ts.sys.getDirectories(npmTypes));
-            }
-            return result;
-        }
-        function getDefaultLibLocation() {
-            return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
-        }
-        var newLine = ts.getNewLineCharacter(options);
-        var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
-        return {
-            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
-            getSourceFile: getSourceFile,
-            getDefaultLibLocation: getDefaultLibLocation,
-            getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
-            writeFile: writeFile,
-            getCurrentDirectory: ts.memoize(function () { return ts.sys.getCurrentDirectory(); }),
-            useCaseSensitiveFileNames: function () { return ts.sys.useCaseSensitiveFileNames; },
-            getCanonicalFileName: getCanonicalFileName,
-            getNewLine: function () { return newLine; },
-            fileExists: function (fileName) { return ts.sys.fileExists(fileName); },
-            readFile: function (fileName) { return ts.sys.readFile(fileName); },
-            trace: function (s) { return ts.sys.write(s + newLine); },
-            directoryExists: function (directoryName) { return ts.sys.directoryExists(directoryName); },
-            realpath: realpath
-        };
-    }
-    ts.createCompilerHost = createCompilerHost;
-    function getPreEmitDiagnostics(program, sourceFile, cancellationToken) {
-        var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
-        if (program.getCompilerOptions().declaration) {
-            diagnostics = diagnostics.concat(program.getDeclarationDiagnostics(sourceFile, cancellationToken));
-        }
-        return ts.sortAndDeduplicateDiagnostics(diagnostics);
-    }
-    ts.getPreEmitDiagnostics = getPreEmitDiagnostics;
-    function flattenDiagnosticMessageText(messageText, newLine) {
-        if (typeof messageText === "string") {
-            return messageText;
-        }
-        else {
-            var diagnosticChain = messageText;
-            var result = "";
-            var indent = 0;
-            while (diagnosticChain) {
-                if (indent) {
-                    result += newLine;
-                    for (var i = 0; i < indent; i++) {
-                        result += "  ";
-                    }
-                }
-                result += diagnosticChain.messageText;
-                indent++;
-                diagnosticChain = diagnosticChain.next;
-            }
-            return result;
-        }
-    }
-    ts.flattenDiagnosticMessageText = flattenDiagnosticMessageText;
-    function loadWithLocalCache(names, containingFile, loader) {
-        if (names.length === 0) {
-            return [];
-        }
-        var resolutions = [];
-        var cache = {};
-        for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
-            var name_33 = names_1[_i];
-            var result = void 0;
-            if (ts.hasProperty(cache, name_33)) {
-                result = cache[name_33];
-            }
-            else {
-                result = loader(name_33, containingFile);
-                cache[name_33] = result;
-            }
-            resolutions.push(result);
-        }
-        return resolutions;
-    }
-    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
-        if (options.types) {
-            return options.types;
-        }
-        if (host && host.getDefaultTypeDirectiveNames) {
-            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
-            if (commonRoot) {
-                return host.getDefaultTypeDirectiveNames(commonRoot);
-            }
-        }
-        return undefined;
-    }
-    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
-    function createProgram(rootNames, options, host, oldProgram) {
-        var program;
-        var files = [];
-        var commonSourceDirectory;
-        var diagnosticsProducingTypeChecker;
-        var noDiagnosticsTypeChecker;
-        var classifiableNames;
-        var resolvedTypeReferenceDirectives = {};
-        var fileProcessingDiagnostics = ts.createDiagnosticCollection();
-        var start = new Date().getTime();
-        host = host || createCompilerHost(options);
-        var skipDefaultLib = options.noLib;
-        var programDiagnostics = ts.createDiagnosticCollection();
-        var currentDirectory = host.getCurrentDirectory();
-        var supportedExtensions = ts.getSupportedExtensions(options);
-        var hasEmitBlockingDiagnostics = ts.createFileMap(getCanonicalFileName);
-        var resolveModuleNamesWorker;
-        if (host.resolveModuleNames) {
-            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
-        }
-        else {
-            var loader_1 = function (moduleName, containingFile) { return resolveModuleName(moduleName, containingFile, options, host).resolvedModule; };
-            resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(moduleNames, containingFile, loader_1); };
-        }
-        var resolveTypeReferenceDirectiveNamesWorker;
-        if (host.resolveTypeReferenceDirectives) {
-            resolveTypeReferenceDirectiveNamesWorker = function (typeDirectiveNames, containingFile) { return host.resolveTypeReferenceDirectives(typeDirectiveNames, containingFile); };
-        }
-        else {
-            var loader_2 = function (typesRef, containingFile) { return resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective; };
-            resolveTypeReferenceDirectiveNamesWorker = function (typeReferenceDirectiveNames, containingFile) { return loadWithLocalCache(typeReferenceDirectiveNames, containingFile, loader_2); };
-        }
-        var filesByName = ts.createFileMap();
-        var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
-        if (!tryReuseStructureFromOldProgram()) {
-            ts.forEach(rootNames, function (name) { return processRootFile(name, false); });
-            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
-            if (typeReferences) {
-                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, undefined);
-                for (var i = 0; i < typeReferences.length; i++) {
-                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
-                }
-            }
-            if (!skipDefaultLib) {
-                if (!options.lib) {
-                    processRootFile(host.getDefaultLibFileName(options), true);
-                }
-                else {
-                    var libDirectory_1 = host.getDefaultLibLocation ? host.getDefaultLibLocation() : ts.getDirectoryPath(host.getDefaultLibFileName(options));
-                    ts.forEach(options.lib, function (libFileName) {
-                        processRootFile(ts.combinePaths(libDirectory_1, libFileName), true);
-                    });
-                }
-            }
-        }
-        oldProgram = undefined;
-        program = {
-            getRootFileNames: function () { return rootNames; },
-            getSourceFile: getSourceFile,
-            getSourceFileByPath: getSourceFileByPath,
-            getSourceFiles: function () { return files; },
-            getCompilerOptions: function () { return options; },
-            getSyntacticDiagnostics: getSyntacticDiagnostics,
-            getOptionsDiagnostics: getOptionsDiagnostics,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getSemanticDiagnostics: getSemanticDiagnostics,
-            getDeclarationDiagnostics: getDeclarationDiagnostics,
-            getTypeChecker: getTypeChecker,
-            getClassifiableNames: getClassifiableNames,
-            getDiagnosticsProducingTypeChecker: getDiagnosticsProducingTypeChecker,
-            getCommonSourceDirectory: getCommonSourceDirectory,
-            emit: emit,
-            getCurrentDirectory: function () { return currentDirectory; },
-            getNodeCount: function () { return getDiagnosticsProducingTypeChecker().getNodeCount(); },
-            getIdentifierCount: function () { return getDiagnosticsProducingTypeChecker().getIdentifierCount(); },
-            getSymbolCount: function () { return getDiagnosticsProducingTypeChecker().getSymbolCount(); },
-            getTypeCount: function () { return getDiagnosticsProducingTypeChecker().getTypeCount(); },
-            getFileProcessingDiagnostics: function () { return fileProcessingDiagnostics; },
-            getResolvedTypeReferenceDirectives: function () { return resolvedTypeReferenceDirectives; }
-        };
-        verifyCompilerOptions();
-        ts.programTime += new Date().getTime() - start;
-        return program;
-        function getCommonSourceDirectory() {
-            if (typeof commonSourceDirectory === "undefined") {
-                if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
-                    commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
-                }
-                else {
-                    commonSourceDirectory = computeCommonSourceDirectory(files);
-                }
-                if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
-                    commonSourceDirectory += ts.directorySeparator;
-                }
-            }
-            return commonSourceDirectory;
-        }
-        function getClassifiableNames() {
-            if (!classifiableNames) {
-                getTypeChecker();
-                classifiableNames = {};
-                for (var _i = 0, files_3 = files; _i < files_3.length; _i++) {
-                    var sourceFile = files_3[_i];
-                    ts.copyMap(sourceFile.classifiableNames, classifiableNames);
-                }
-            }
-            return classifiableNames;
-        }
-        function tryReuseStructureFromOldProgram() {
-            if (!oldProgram) {
-                return false;
-            }
-            var oldOptions = oldProgram.getCompilerOptions();
-            if ((oldOptions.module !== options.module) ||
-                (oldOptions.noResolve !== options.noResolve) ||
-                (oldOptions.target !== options.target) ||
-                (oldOptions.noLib !== options.noLib) ||
-                (oldOptions.jsx !== options.jsx) ||
-                (oldOptions.allowJs !== options.allowJs) ||
-                (oldOptions.rootDir !== options.rootDir) ||
-                (oldOptions.typesSearchPaths !== options.typesSearchPaths) ||
-                (oldOptions.configFilePath !== options.configFilePath) ||
-                (oldOptions.baseUrl !== options.baseUrl) ||
-                (oldOptions.typesRoot !== options.typesRoot) ||
-                !ts.arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
-                !ts.mapIsEqualTo(oldOptions.paths, options.paths)) {
-                return false;
-            }
-            ts.Debug.assert(!oldProgram.structureIsReused);
-            var oldRootNames = oldProgram.getRootFileNames();
-            if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
-                return false;
-            }
-            if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
-                return false;
-            }
-            var newSourceFiles = [];
-            var filePaths = [];
-            var modifiedSourceFiles = [];
-            for (var _i = 0, _a = oldProgram.getSourceFiles(); _i < _a.length; _i++) {
-                var oldSourceFile = _a[_i];
-                var newSourceFile = host.getSourceFileByPath
-                    ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target)
-                    : host.getSourceFile(oldSourceFile.fileName, options.target);
-                if (!newSourceFile) {
-                    return false;
-                }
-                newSourceFile.path = oldSourceFile.path;
-                filePaths.push(newSourceFile.path);
-                if (oldSourceFile !== newSourceFile) {
-                    if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
-                        return false;
-                    }
-                    if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
-                        return false;
-                    }
-                    collectExternalModuleReferences(newSourceFile);
-                    if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
-                        return false;
-                    }
-                    if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
-                        return false;
-                    }
-                    if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
-                        return false;
-                    }
-                    var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
-                    if (resolveModuleNamesWorker) {
-                        var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
-                        var resolutions = resolveModuleNamesWorker(moduleNames, newSourceFilePath);
-                        var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
-                    }
-                    if (resolveTypeReferenceDirectiveNamesWorker) {
-                        var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
-                        var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
-                        var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
-                    }
-                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
-                    newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
-                    modifiedSourceFiles.push(newSourceFile);
-                }
-                else {
-                    newSourceFile = oldSourceFile;
-                }
-                newSourceFiles.push(newSourceFile);
-            }
-            for (var i = 0, len = newSourceFiles.length; i < len; i++) {
-                filesByName.set(filePaths[i], newSourceFiles[i]);
-            }
-            files = newSourceFiles;
-            fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
-            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
-                var modifiedFile = modifiedSourceFiles_1[_b];
-                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile);
-            }
-            resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
-            oldProgram.structureIsReused = true;
-            return true;
-        }
-        function getEmitHost(writeFileCallback) {
-            return {
-                getCanonicalFileName: getCanonicalFileName,
-                getCommonSourceDirectory: program.getCommonSourceDirectory,
-                getCompilerOptions: program.getCompilerOptions,
-                getCurrentDirectory: function () { return currentDirectory; },
-                getNewLine: function () { return host.getNewLine(); },
-                getSourceFile: program.getSourceFile,
-                getSourceFileByPath: program.getSourceFileByPath,
-                getSourceFiles: program.getSourceFiles,
-                writeFile: writeFileCallback || (function (fileName, data, writeByteOrderMark, onError, sourceFiles) { return host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles); }),
-                isEmitBlocked: isEmitBlocked
-            };
-        }
-        function getDiagnosticsProducingTypeChecker() {
-            return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, true));
-        }
-        function getTypeChecker() {
-            return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, false));
-        }
-        function emit(sourceFile, writeFileCallback, cancellationToken) {
-            var _this = this;
-            return runWithCancellationToken(function () { return emitWorker(_this, sourceFile, writeFileCallback, cancellationToken); });
-        }
-        function isEmitBlocked(emitFileName) {
-            return hasEmitBlockingDiagnostics.contains(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName));
-        }
-        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken) {
-            var declarationDiagnostics = [];
-            if (options.noEmit) {
-                return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
-            }
-            if (options.noEmitOnError) {
-                var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
-                if (diagnostics.length === 0 && program.getCompilerOptions().declaration) {
-                    declarationDiagnostics = program.getDeclarationDiagnostics(undefined, cancellationToken);
-                }
-                if (diagnostics.length > 0 || declarationDiagnostics.length > 0) {
-                    return {
-                        diagnostics: ts.concatenate(diagnostics, declarationDiagnostics),
-                        sourceMaps: undefined,
-                        emittedFiles: undefined,
-                        emitSkipped: true
-                    };
-                }
-            }
-            var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile);
-            var start = new Date().getTime();
-            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile);
-            ts.emitTime += new Date().getTime() - start;
-            return emitResult;
-        }
-        function getSourceFile(fileName) {
-            return getSourceFileByPath(ts.toPath(fileName, currentDirectory, getCanonicalFileName));
-        }
-        function getSourceFileByPath(path) {
-            return filesByName.get(path);
-        }
-        function getDiagnosticsHelper(sourceFile, getDiagnostics, cancellationToken) {
-            if (sourceFile) {
-                return getDiagnostics(sourceFile, cancellationToken);
-            }
-            var allDiagnostics = [];
-            ts.forEach(program.getSourceFiles(), function (sourceFile) {
-                if (cancellationToken) {
-                    cancellationToken.throwIfCancellationRequested();
-                }
-                ts.addRange(allDiagnostics, getDiagnostics(sourceFile, cancellationToken));
-            });
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function getSyntacticDiagnostics(sourceFile, cancellationToken) {
-            return getDiagnosticsHelper(sourceFile, getSyntacticDiagnosticsForFile, cancellationToken);
-        }
-        function getSemanticDiagnostics(sourceFile, cancellationToken) {
-            return getDiagnosticsHelper(sourceFile, getSemanticDiagnosticsForFile, cancellationToken);
-        }
-        function getDeclarationDiagnostics(sourceFile, cancellationToken) {
-            var options = program.getCompilerOptions();
-            if (!sourceFile || options.out || options.outFile) {
-                return getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
-            }
-            else {
-                return getDiagnosticsHelper(sourceFile, getDeclarationDiagnosticsForFile, cancellationToken);
-            }
-        }
-        function getSyntacticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return sourceFile.parseDiagnostics;
-        }
-        function runWithCancellationToken(func) {
-            try {
-                return func();
-            }
-            catch (e) {
-                if (e instanceof ts.OperationCanceledException) {
-                    noDiagnosticsTypeChecker = undefined;
-                    diagnosticsProducingTypeChecker = undefined;
-                }
-                throw e;
-            }
-        }
-        function getSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var typeChecker = getDiagnosticsProducingTypeChecker();
-                ts.Debug.assert(!!sourceFile.bindDiagnostics);
-                var bindDiagnostics = sourceFile.bindDiagnostics;
-                var checkDiagnostics = ts.isSourceFileJavaScript(sourceFile) ?
-                    getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) :
-                    typeChecker.getDiagnostics(sourceFile, cancellationToken);
-                var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
-                var programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
-                return bindDiagnostics.concat(checkDiagnostics).concat(fileProcessingDiagnosticsInFile).concat(programDiagnosticsInFile);
-            });
-        }
-        function getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var diagnostics = [];
-                walk(sourceFile);
-                return diagnostics;
-                function walk(node) {
-                    if (!node) {
-                        return false;
-                    }
-                    switch (node.kind) {
-                        case 229:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 235:
-                            if (node.isExportEquals) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 221:
-                            var classDeclaration = node;
-                            if (checkModifiers(classDeclaration.modifiers) ||
-                                checkTypeParameters(classDeclaration.typeParameters)) {
-                                return true;
-                            }
-                            break;
-                        case 251:
-                            var heritageClause = node;
-                            if (heritageClause.token === 106) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 222:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 225:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 223:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 147:
-                        case 146:
-                        case 148:
-                        case 149:
-                        case 150:
-                        case 179:
-                        case 220:
-                        case 180:
-                        case 220:
-                            var functionDeclaration = node;
-                            if (checkModifiers(functionDeclaration.modifiers) ||
-                                checkTypeParameters(functionDeclaration.typeParameters) ||
-                                checkTypeAnnotation(functionDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 200:
-                            var variableStatement = node;
-                            if (checkModifiers(variableStatement.modifiers)) {
-                                return true;
-                            }
-                            break;
-                        case 218:
-                            var variableDeclaration = node;
-                            if (checkTypeAnnotation(variableDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 174:
-                        case 175:
-                            var expression = node;
-                            if (expression.typeArguments && expression.typeArguments.length > 0) {
-                                var start_2 = expression.typeArguments.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_2, expression.typeArguments.end - start_2, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 142:
-                            var parameter = node;
-                            if (parameter.modifiers) {
-                                var start_3 = parameter.modifiers.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_3, parameter.modifiers.end - start_3, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            if (parameter.questionToken) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
-                                return true;
-                            }
-                            if (parameter.type) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 145:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.property_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 224:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 177:
-                            var typeAssertionExpression = node;
-                            diagnostics.push(ts.createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 143:
-                            if (!options.experimentalDecorators) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
-                            }
-                            return true;
-                    }
-                    return ts.forEachChild(node, walk);
-                }
-                function checkTypeParameters(typeParameters) {
-                    if (typeParameters) {
-                        var start_4 = typeParameters.pos;
-                        diagnostics.push(ts.createFileDiagnostic(sourceFile, start_4, typeParameters.end - start_4, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
-                        return true;
-                    }
-                    return false;
-                }
-                function checkTypeAnnotation(type) {
-                    if (type) {
-                        diagnostics.push(ts.createDiagnosticForNode(type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                        return true;
-                    }
-                    return false;
-                }
-                function checkModifiers(modifiers) {
-                    if (modifiers) {
-                        for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
-                            var modifier = modifiers_1[_i];
-                            switch (modifier.kind) {
-                                case 112:
-                                case 110:
-                                case 111:
-                                case 128:
-                                case 122:
-                                    diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
-                                    return true;
-                                case 113:
-                                case 82:
-                                case 74:
-                                case 77:
-                                case 115:
-                            }
-                        }
-                    }
-                    return false;
-                }
-            });
-        }
-        function getDeclarationDiagnosticsWorker(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
-                var writeFile = function () { };
-                return ts.getDeclarationDiagnostics(getEmitHost(writeFile), resolver, sourceFile);
-            });
-        }
-        function getDeclarationDiagnosticsForFile(sourceFile, cancellationToken) {
-            return ts.isDeclarationFile(sourceFile) ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
-        }
-        function getOptionsDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, fileProcessingDiagnostics.getGlobalDiagnostics());
-            ts.addRange(allDiagnostics, programDiagnostics.getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function getGlobalDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, getDiagnosticsProducingTypeChecker().getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function hasExtension(fileName) {
-            return ts.getBaseFileName(fileName).indexOf(".") >= 0;
-        }
-        function processRootFile(fileName, isDefaultLib) {
-            processSourceFile(ts.normalizePath(fileName), isDefaultLib, true);
-        }
-        function fileReferenceIsEqualTo(a, b) {
-            return a.fileName === b.fileName;
-        }
-        function moduleNameIsEqualTo(a, b) {
-            return a.text === b.text;
-        }
-        function getTextOfLiteral(literal) {
-            return literal.text;
-        }
-        function collectExternalModuleReferences(file) {
-            if (file.imports) {
-                return;
-            }
-            var isJavaScriptFile = ts.isSourceFileJavaScript(file);
-            var isExternalModuleFile = ts.isExternalModule(file);
-            var imports;
-            var moduleAugmentations;
-            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
-                var node = _a[_i];
-                collectModuleReferences(node, false);
-                if (isJavaScriptFile) {
-                    collectRequireCalls(node);
-                }
-            }
-            file.imports = imports || emptyArray;
-            file.moduleAugmentations = moduleAugmentations || emptyArray;
-            return;
-            function collectModuleReferences(node, inAmbientModule) {
-                switch (node.kind) {
-                    case 230:
-                    case 229:
-                    case 236:
-                        var moduleNameExpr = ts.getExternalModuleName(node);
-                        if (!moduleNameExpr || moduleNameExpr.kind !== 9) {
-                            break;
-                        }
-                        if (!moduleNameExpr.text) {
-                            break;
-                        }
-                        if (!inAmbientModule || !ts.isExternalModuleNameRelative(moduleNameExpr.text)) {
-                            (imports || (imports = [])).push(moduleNameExpr);
-                        }
-                        break;
-                    case 225:
-                        if (ts.isAmbientModule(node) && (inAmbientModule || node.flags & 2 || ts.isDeclarationFile(file))) {
-                            var moduleName = node.name;
-                            if (isExternalModuleFile || (inAmbientModule && !ts.isExternalModuleNameRelative(moduleName.text))) {
-                                (moduleAugmentations || (moduleAugmentations = [])).push(moduleName);
-                            }
-                            else if (!inAmbientModule) {
-                                for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
-                                    var statement = _a[_i];
-                                    collectModuleReferences(statement, true);
-                                }
-                            }
-                        }
-                }
-            }
-            function collectRequireCalls(node) {
-                if (ts.isRequireCall(node, true)) {
-                    (imports || (imports = [])).push(node.arguments[0]);
-                }
-                else {
-                    ts.forEachChild(node, collectRequireCalls);
-                }
-            }
-        }
-        function processSourceFile(fileName, isDefaultLib, isReference, refFile, refPos, refEnd) {
-            var diagnosticArgument;
-            var diagnostic;
-            if (hasExtension(fileName)) {
-                if (!options.allowNonTsExtensions && !ts.forEach(supportedExtensions, function (extension) { return ts.fileExtensionIs(host.getCanonicalFileName(fileName), extension); })) {
-                    diagnostic = ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1;
-                    diagnosticArgument = [fileName, "'" + supportedExtensions.join("', '") + "'"];
-                }
-                else if (!findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd)) {
-                    diagnostic = ts.Diagnostics.File_0_not_found;
-                    diagnosticArgument = [fileName];
-                }
-                else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
-                    diagnostic = ts.Diagnostics.A_file_cannot_have_a_reference_to_itself;
-                    diagnosticArgument = [fileName];
-                }
-            }
-            else {
-                var nonTsFile = options.allowNonTsExtensions && findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd);
-                if (!nonTsFile) {
-                    if (options.allowNonTsExtensions) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        diagnosticArgument = [fileName];
-                    }
-                    else if (!ts.forEach(supportedExtensions, function (extension) { return findSourceFile(fileName + extension, ts.toPath(fileName + extension, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd); })) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        fileName += ".ts";
-                        diagnosticArgument = [fileName];
-                    }
-                }
-            }
-            if (diagnostic) {
-                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
-                    fileProcessingDiagnostics.add(ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(diagnosticArgument)));
-                }
-                else {
-                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(diagnosticArgument)));
-                }
-            }
-        }
-        function reportFileNamesDifferOnlyInCasingError(fileName, existingFileName, refFile, refPos, refEnd) {
-            if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
-                fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
-            }
-            else {
-                fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
-            }
-        }
-        function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) {
-            if (filesByName.contains(path)) {
-                var file_1 = filesByName.get(path);
-                if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
-                    reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
-                }
-                return file_1;
-            }
-            var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
-                if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
-                    fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
-                }
-                else {
-                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
-                }
-            });
-            filesByName.set(path, file);
-            if (file) {
-                file.path = path;
-                if (host.useCaseSensitiveFileNames()) {
-                    var existingFile = filesByNameIgnoreCase.get(path);
-                    if (existingFile) {
-                        reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd);
-                    }
-                    else {
-                        filesByNameIgnoreCase.set(path, file);
-                    }
-                }
-                skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
-                var basePath = ts.getDirectoryPath(fileName);
-                if (!options.noResolve) {
-                    processReferencedFiles(file, basePath, isDefaultLib);
-                    processTypeReferenceDirectives(file);
-                }
-                processImportedModules(file, basePath);
-                if (isDefaultLib) {
-                    files.unshift(file);
-                }
-                else {
-                    files.push(file);
-                }
-            }
-            return file;
-        }
-        function processReferencedFiles(file, basePath, isDefaultLib) {
-            ts.forEach(file.referencedFiles, function (ref) {
-                var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
-                processSourceFile(referencedFileName, isDefaultLib, true, file, ref.pos, ref.end);
-            });
-        }
-        function processTypeReferenceDirectives(file) {
-            var typeDirectives = ts.map(file.typeReferenceDirectives, function (l) { return l.fileName; });
-            var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeDirectives, file.fileName);
-            for (var i = 0; i < typeDirectives.length; i++) {
-                var ref = file.typeReferenceDirectives[i];
-                var resolvedTypeReferenceDirective = resolutions[i];
-                ts.setResolvedTypeReferenceDirective(file, ref.fileName, resolvedTypeReferenceDirective);
-                processTypeReferenceDirective(ref.fileName, resolvedTypeReferenceDirective, file, ref.pos, ref.end);
-            }
-        }
-        function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
-            var previousResolution = resolvedTypeReferenceDirectives[typeReferenceDirective];
-            if (previousResolution && previousResolution.primary) {
-                return;
-            }
-            var saveResolution = true;
-            if (resolvedTypeReferenceDirective) {
-                if (resolvedTypeReferenceDirective.primary) {
-                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, true, refFile, refPos, refEnd);
-                }
-                else {
-                    if (previousResolution) {
-                        var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
-                        if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
-                            fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
-                        }
-                        saveResolution = false;
-                    }
-                    else {
-                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, true, refFile, refPos, refEnd);
-                    }
-                }
-            }
-            else {
-                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_name_0, typeReferenceDirective));
-            }
-            if (saveResolution) {
-                resolvedTypeReferenceDirectives[typeReferenceDirective] = resolvedTypeReferenceDirective;
-            }
-        }
-        function createDiagnostic(refFile, refPos, refEnd, message) {
-            var args = [];
-            for (var _i = 4; _i < arguments.length; _i++) {
-                args[_i - 4] = arguments[_i];
-            }
-            if (refFile === undefined || refPos === undefined || refEnd === undefined) {
-                return ts.createCompilerDiagnostic.apply(void 0, [message].concat(args));
-            }
-            else {
-                return ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, message].concat(args));
-            }
-        }
-        function getCanonicalFileName(fileName) {
-            return host.getCanonicalFileName(fileName);
-        }
-        function processImportedModules(file, basePath) {
-            collectExternalModuleReferences(file);
-            if (file.imports.length || file.moduleAugmentations.length) {
-                file.resolvedModules = {};
-                var moduleNames = ts.map(ts.concatenate(file.imports, file.moduleAugmentations), getTextOfLiteral);
-                var resolutions = resolveModuleNamesWorker(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory));
-                for (var i = 0; i < moduleNames.length; i++) {
-                    var resolution = resolutions[i];
-                    ts.setResolvedModule(file, moduleNames[i], resolution);
-                    var shouldAddFile = resolution &&
-                        !options.noResolve &&
-                        i < file.imports.length;
-                    if (shouldAddFile) {
-                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), false, false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
-                    }
-                }
-            }
-            else {
-                file.resolvedModules = undefined;
-            }
-            return;
-        }
-        function computeCommonSourceDirectory(sourceFiles) {
-            var fileNames = [];
-            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
-                var file = sourceFiles_2[_i];
-                if (!file.isDeclarationFile) {
-                    fileNames.push(file.fileName);
-                }
-            }
-            return computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName);
-        }
-        function checkSourceFilesBelongToPath(sourceFiles, rootDirectory) {
-            var allFilesBelongToPath = true;
-            if (sourceFiles) {
-                var absoluteRootDirectoryPath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(rootDirectory, currentDirectory));
-                for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
-                    var sourceFile = sourceFiles_3[_i];
-                    if (!ts.isDeclarationFile(sourceFile)) {
-                        var absoluteSourceFilePath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
-                        if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
-                            programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
-                            allFilesBelongToPath = false;
-                        }
-                    }
-                }
-            }
-            return allFilesBelongToPath;
-        }
-        function verifyCompilerOptions() {
-            if (options.isolatedModules) {
-                if (options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules"));
-                }
-                if (options.noEmitOnError) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules"));
-                }
-                if (options.out) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules"));
-                }
-                if (options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules"));
-                }
-            }
-            if (options.inlineSourceMap) {
-                if (options.sourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap"));
-                }
-                if (options.mapRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap"));
-                }
-            }
-            if (options.paths && options.baseUrl === undefined) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option));
-            }
-            if (options.paths) {
-                for (var key in options.paths) {
-                    if (!ts.hasProperty(options.paths, key)) {
-                        continue;
-                    }
-                    if (!hasZeroOrOneAsteriskCharacter(key)) {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key));
-                    }
-                    if (ts.isArray(options.paths[key])) {
-                        for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
-                            var subst = _a[_i];
-                            var typeOfSubst = typeof subst;
-                            if (typeOfSubst === "string") {
-                                if (!hasZeroOrOneAsteriskCharacter(subst)) {
-                                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key));
-                                }
-                            }
-                            else {
-                                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst));
-                            }
-                        }
-                    }
-                    else {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
-                    }
-                }
-            }
-            if (options.inlineSources) {
-                if (!options.sourceMap && !options.inlineSourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided));
-                }
-                if (options.sourceRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceRoot", "inlineSources"));
-                }
-            }
-            if (options.out && options.outFile) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
-            }
-            if (!options.sourceMap && (options.mapRoot || options.sourceRoot)) {
-                if (options.mapRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
-                }
-                if (options.sourceRoot && !options.inlineSourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "sourceRoot", "sourceMap"));
-                }
-            }
-            if (options.declarationDir) {
-                if (!options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration"));
-                }
-                if (options.out || options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile"));
-                }
-            }
-            if (options.lib && options.noLib) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib"));
-            }
-            var languageVersion = options.target || 0;
-            var outFile = options.outFile || options.out;
-            var firstExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) ? f : undefined; });
-            if (options.isolatedModules) {
-                if (options.module === ts.ModuleKind.None && languageVersion < 2) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
-                }
-                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
-                if (firstNonExternalModuleSourceFile) {
-                    var span = ts.getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
-                    programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
-                }
-            }
-            else if (firstExternalModuleSourceFile && languageVersion < 2 && options.module === ts.ModuleKind.None) {
-                var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
-            }
-            if (options.module === ts.ModuleKind.ES6 && languageVersion < 2) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
-            }
-            if (outFile) {
-                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
-                }
-                else if (options.module === undefined && firstExternalModuleSourceFile) {
-                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
-                }
-            }
-            if (options.outDir ||
-                options.sourceRoot ||
-                options.mapRoot) {
-                var dir = getCommonSourceDirectory();
-                if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files));
-                }
-            }
-            if (!options.noEmit && options.allowJs && options.declaration) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration"));
-            }
-            if (options.emitDecoratorMetadata &&
-                !options.experimentalDecorators) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators"));
-            }
-            if (options.reactNamespace && !ts.isIdentifier(options.reactNamespace, languageVersion)) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace));
-            }
-            if (!options.noEmit && !options.suppressOutputPathCheck) {
-                var emitHost = getEmitHost();
-                var emitFilesSeen_1 = ts.createFileMap(!host.useCaseSensitiveFileNames() ? function (key) { return key.toLocaleLowerCase(); } : undefined);
-                ts.forEachExpectedEmitFile(emitHost, function (emitFileNames, sourceFiles, isBundledEmit) {
-                    verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen_1);
-                    verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
-                });
-            }
-            function verifyEmitFilePath(emitFileName, emitFilesSeen) {
-                if (emitFileName) {
-                    var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName);
-                    if (filesByName.contains(emitFilePath)) {
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file);
-                    }
-                    if (emitFilesSeen.contains(emitFilePath)) {
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files);
-                    }
-                    else {
-                        emitFilesSeen.set(emitFilePath, true);
-                    }
-                }
-            }
-        }
-        function createEmitBlockingDiagnostics(emitFileName, emitFilePath, message) {
-            hasEmitBlockingDiagnostics.set(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName), true);
-            programDiagnostics.add(ts.createCompilerDiagnostic(message, emitFileName));
-        }
-    }
-    ts.createProgram = createProgram;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var BreakpointResolver;
-    (function (BreakpointResolver) {
-        function spanInSourceFileAtLocation(sourceFile, position) {
-            if (sourceFile.isDeclarationFile) {
-                return undefined;
-            }
-            var tokenAtLocation = ts.getTokenAtPosition(sourceFile, position);
-            var lineOfPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
-            if (sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getStart(sourceFile)).line > lineOfPosition) {
-                tokenAtLocation = ts.findPrecedingToken(tokenAtLocation.pos, sourceFile);
-                if (!tokenAtLocation || sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getEnd()).line !== lineOfPosition) {
-                    return undefined;
-                }
-            }
-            if (ts.isInAmbientContext(tokenAtLocation)) {
-                return undefined;
-            }
-            return spanInNode(tokenAtLocation);
-            function textSpan(startNode, endNode) {
-                var start = startNode.decorators ?
-                    ts.skipTrivia(sourceFile.text, startNode.decorators.end) :
-                    startNode.getStart(sourceFile);
-                return ts.createTextSpanFromBounds(start, (endNode || startNode).getEnd());
-            }
-            function textSpanEndingAtNextToken(startNode, previousTokenToFindNextEndToken) {
-                return textSpan(startNode, ts.findNextToken(previousTokenToFindNextEndToken, previousTokenToFindNextEndToken.parent));
-            }
-            function spanInNodeIfStartsOnSameLine(node, otherwiseOnNode) {
-                if (node && lineOfPosition === sourceFile.getLineAndCharacterOfPosition(node.getStart(sourceFile)).line) {
-                    return spanInNode(node);
-                }
-                return spanInNode(otherwiseOnNode);
-            }
-            function spanInNodeArray(nodeArray) {
-                return ts.createTextSpanFromBounds(ts.skipTrivia(sourceFile.text, nodeArray.pos), nodeArray.end);
-            }
-            function spanInPreviousNode(node) {
-                return spanInNode(ts.findPrecedingToken(node.pos, sourceFile));
-            }
-            function spanInNextNode(node) {
-                return spanInNode(ts.findNextToken(node, node.parent));
-            }
-            function spanInNode(node) {
-                if (node) {
-                    switch (node.kind) {
-                        case 200:
-                            return spanInVariableDeclaration(node.declarationList.declarations[0]);
-                        case 218:
-                        case 145:
-                        case 144:
-                            return spanInVariableDeclaration(node);
-                        case 142:
-                            return spanInParameterDeclaration(node);
-                        case 220:
-                        case 147:
-                        case 146:
-                        case 149:
-                        case 150:
-                        case 148:
-                        case 179:
-                        case 180:
-                            return spanInFunctionDeclaration(node);
-                        case 199:
-                            if (ts.isFunctionBlock(node)) {
-                                return spanInFunctionBlock(node);
-                            }
-                        case 226:
-                            return spanInBlock(node);
-                        case 252:
-                            return spanInBlock(node.block);
-                        case 202:
-                            return textSpan(node.expression);
-                        case 211:
-                            return textSpan(node.getChildAt(0), node.expression);
-                        case 205:
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 204:
-                            return spanInNode(node.statement);
-                        case 217:
-                            return textSpan(node.getChildAt(0));
-                        case 203:
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 214:
-                            return spanInNode(node.statement);
-                        case 210:
-                        case 209:
-                            return textSpan(node.getChildAt(0), node.label);
-                        case 206:
-                            return spanInForStatement(node);
-                        case 207:
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 208:
-                            return spanInInitializerOfForLike(node);
-                        case 213:
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 249:
-                        case 250:
-                            return spanInNode(node.statements[0]);
-                        case 216:
-                            return spanInBlock(node.tryBlock);
-                        case 215:
-                            return textSpan(node, node.expression);
-                        case 235:
-                            return textSpan(node, node.expression);
-                        case 229:
-                            return textSpan(node, node.moduleReference);
-                        case 230:
-                            return textSpan(node, node.moduleSpecifier);
-                        case 236:
-                            return textSpan(node, node.moduleSpecifier);
-                        case 225:
-                            if (ts.getModuleInstanceState(node) !== 1) {
-                                return undefined;
-                            }
-                        case 221:
-                        case 224:
-                        case 255:
-                        case 169:
-                            return textSpan(node);
-                        case 212:
-                            return spanInNode(node.statement);
-                        case 143:
-                            return spanInNodeArray(node.parent.decorators);
-                        case 167:
-                        case 168:
-                            return spanInBindingPattern(node);
-                        case 222:
-                        case 223:
-                            return undefined;
-                        case 23:
-                        case 1:
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile));
-                        case 24:
-                            return spanInPreviousNode(node);
-                        case 15:
-                            return spanInOpenBraceToken(node);
-                        case 16:
-                            return spanInCloseBraceToken(node);
-                        case 20:
-                            return spanInCloseBracketToken(node);
-                        case 17:
-                            return spanInOpenParenToken(node);
-                        case 18:
-                            return spanInCloseParenToken(node);
-                        case 54:
-                            return spanInColonToken(node);
-                        case 27:
-                        case 25:
-                            return spanInGreaterThanOrLessThanToken(node);
-                        case 104:
-                            return spanInWhileKeyword(node);
-                        case 80:
-                        case 72:
-                        case 85:
-                            return spanInNextNode(node);
-                        case 138:
-                            return spanInOfKeyword(node);
-                        default:
-                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node)) {
-                                return spanInArrayLiteralOrObjectLiteralDestructuringPattern(node);
-                            }
-                            if ((node.kind === 69 ||
-                                node.kind == 191 ||
-                                node.kind === 253 ||
-                                node.kind === 254) &&
-                                ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
-                                return textSpan(node);
-                            }
-                            if (node.kind === 187) {
-                                var binaryExpression = node;
-                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left)) {
-                                    return spanInArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left);
-                                }
-                                if (binaryExpression.operatorToken.kind === 56 &&
-                                    ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.parent)) {
-                                    return textSpan(node);
-                                }
-                                if (binaryExpression.operatorToken.kind === 24) {
-                                    return spanInNode(binaryExpression.left);
-                                }
-                            }
-                            if (ts.isExpression(node)) {
-                                switch (node.parent.kind) {
-                                    case 204:
-                                        return spanInPreviousNode(node);
-                                    case 143:
-                                        return spanInNode(node.parent);
-                                    case 206:
-                                    case 208:
-                                        return textSpan(node);
-                                    case 187:
-                                        if (node.parent.operatorToken.kind === 24) {
-                                            return textSpan(node);
-                                        }
-                                        break;
-                                    case 180:
-                                        if (node.parent.body === node) {
-                                            return textSpan(node);
-                                        }
-                                        break;
-                                }
-                            }
-                            if (node.parent.kind === 253 &&
-                                node.parent.name === node &&
-                                !ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.parent)) {
-                                return spanInNode(node.parent.initializer);
-                            }
-                            if (node.parent.kind === 177 && node.parent.type === node) {
-                                return spanInNextNode(node.parent.type);
-                            }
-                            if (ts.isFunctionLike(node.parent) && node.parent.type === node) {
-                                return spanInPreviousNode(node);
-                            }
-                            if ((node.parent.kind === 218 ||
-                                node.parent.kind === 142)) {
-                                var paramOrVarDecl = node.parent;
-                                if (paramOrVarDecl.initializer === node ||
-                                    paramOrVarDecl.type === node ||
-                                    ts.isAssignmentOperator(node.kind)) {
-                                    return spanInPreviousNode(node);
-                                }
-                            }
-                            if (node.parent.kind === 187) {
-                                var binaryExpression = node.parent;
-                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left) &&
-                                    (binaryExpression.right === node ||
-                                        binaryExpression.operatorToken === node)) {
-                                    return spanInPreviousNode(node);
-                                }
-                            }
-                            return spanInNode(node.parent);
-                    }
-                }
-                function textSpanFromVariableDeclaration(variableDeclaration) {
-                    var declarations = variableDeclaration.parent.declarations;
-                    if (declarations && declarations[0] === variableDeclaration) {
-                        return textSpan(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent), variableDeclaration);
-                    }
-                    else {
-                        return textSpan(variableDeclaration);
-                    }
-                }
-                function spanInVariableDeclaration(variableDeclaration) {
-                    if (variableDeclaration.parent.parent.kind === 207) {
-                        return spanInNode(variableDeclaration.parent.parent);
-                    }
-                    if (ts.isBindingPattern(variableDeclaration.name)) {
-                        return spanInBindingPattern(variableDeclaration.name);
-                    }
-                    if (variableDeclaration.initializer ||
-                        (variableDeclaration.flags & 1) ||
-                        variableDeclaration.parent.parent.kind === 208) {
-                        return textSpanFromVariableDeclaration(variableDeclaration);
-                    }
-                    var declarations = variableDeclaration.parent.declarations;
-                    if (declarations && declarations[0] !== variableDeclaration) {
-                        return spanInNode(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent));
-                    }
-                }
-                function canHaveSpanInParameterDeclaration(parameter) {
-                    return !!parameter.initializer || parameter.dotDotDotToken !== undefined ||
-                        !!(parameter.flags & 4) || !!(parameter.flags & 8);
-                }
-                function spanInParameterDeclaration(parameter) {
-                    if (ts.isBindingPattern(parameter.name)) {
-                        return spanInBindingPattern(parameter.name);
-                    }
-                    else if (canHaveSpanInParameterDeclaration(parameter)) {
-                        return textSpan(parameter);
-                    }
-                    else {
-                        var functionDeclaration = parameter.parent;
-                        var indexOfParameter = ts.indexOf(functionDeclaration.parameters, parameter);
-                        if (indexOfParameter) {
-                            return spanInParameterDeclaration(functionDeclaration.parameters[indexOfParameter - 1]);
-                        }
-                        else {
-                            return spanInNode(functionDeclaration.body);
-                        }
-                    }
-                }
-                function canFunctionHaveSpanInWholeDeclaration(functionDeclaration) {
-                    return !!(functionDeclaration.flags & 1) ||
-                        (functionDeclaration.parent.kind === 221 && functionDeclaration.kind !== 148);
-                }
-                function spanInFunctionDeclaration(functionDeclaration) {
-                    if (!functionDeclaration.body) {
-                        return undefined;
-                    }
-                    if (canFunctionHaveSpanInWholeDeclaration(functionDeclaration)) {
-                        return textSpan(functionDeclaration);
-                    }
-                    return spanInNode(functionDeclaration.body);
-                }
-                function spanInFunctionBlock(block) {
-                    var nodeForSpanInBlock = block.statements.length ? block.statements[0] : block.getLastToken();
-                    if (canFunctionHaveSpanInWholeDeclaration(block.parent)) {
-                        return spanInNodeIfStartsOnSameLine(block.parent, nodeForSpanInBlock);
-                    }
-                    return spanInNode(nodeForSpanInBlock);
-                }
-                function spanInBlock(block) {
-                    switch (block.parent.kind) {
-                        case 225:
-                            if (ts.getModuleInstanceState(block.parent) !== 1) {
-                                return undefined;
-                            }
-                        case 205:
-                        case 203:
-                        case 207:
-                            return spanInNodeIfStartsOnSameLine(block.parent, block.statements[0]);
-                        case 206:
-                        case 208:
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(block.pos, sourceFile, block.parent), block.statements[0]);
-                    }
-                    return spanInNode(block.statements[0]);
-                }
-                function spanInInitializerOfForLike(forLikeStatement) {
-                    if (forLikeStatement.initializer.kind === 219) {
-                        var variableDeclarationList = forLikeStatement.initializer;
-                        if (variableDeclarationList.declarations.length > 0) {
-                            return spanInNode(variableDeclarationList.declarations[0]);
-                        }
-                    }
-                    else {
-                        return spanInNode(forLikeStatement.initializer);
-                    }
-                }
-                function spanInForStatement(forStatement) {
-                    if (forStatement.initializer) {
-                        return spanInInitializerOfForLike(forStatement);
-                    }
-                    if (forStatement.condition) {
-                        return textSpan(forStatement.condition);
-                    }
-                    if (forStatement.incrementor) {
-                        return textSpan(forStatement.incrementor);
-                    }
-                }
-                function spanInBindingPattern(bindingPattern) {
-                    var firstBindingElement = ts.forEach(bindingPattern.elements, function (element) { return element.kind !== 193 ? element : undefined; });
-                    if (firstBindingElement) {
-                        return spanInNode(firstBindingElement);
-                    }
-                    if (bindingPattern.parent.kind === 169) {
-                        return textSpan(bindingPattern.parent);
-                    }
-                    return textSpanFromVariableDeclaration(bindingPattern.parent);
-                }
-                function spanInArrayLiteralOrObjectLiteralDestructuringPattern(node) {
-                    ts.Debug.assert(node.kind !== 168 && node.kind !== 167);
-                    var elements = node.kind === 170 ?
-                        node.elements :
-                        node.properties;
-                    var firstBindingElement = ts.forEach(elements, function (element) { return element.kind !== 193 ? element : undefined; });
-                    if (firstBindingElement) {
-                        return spanInNode(firstBindingElement);
-                    }
-                    return textSpan(node.parent.kind === 187 ? node.parent : node);
-                }
-                function spanInOpenBraceToken(node) {
-                    switch (node.parent.kind) {
-                        case 224:
-                            var enumDeclaration = node.parent;
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), enumDeclaration.members.length ? enumDeclaration.members[0] : enumDeclaration.getLastToken(sourceFile));
-                        case 221:
-                            var classDeclaration = node.parent;
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), classDeclaration.members.length ? classDeclaration.members[0] : classDeclaration.getLastToken(sourceFile));
-                        case 227:
-                            return spanInNodeIfStartsOnSameLine(node.parent.parent, node.parent.clauses[0]);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInCloseBraceToken(node) {
-                    switch (node.parent.kind) {
-                        case 226:
-                            if (ts.getModuleInstanceState(node.parent.parent) !== 1) {
-                                return undefined;
-                            }
-                        case 224:
-                        case 221:
-                            return textSpan(node);
-                        case 199:
-                            if (ts.isFunctionBlock(node.parent)) {
-                                return textSpan(node);
-                            }
-                        case 252:
-                            return spanInNode(ts.lastOrUndefined(node.parent.statements));
-                        case 227:
-                            var caseBlock = node.parent;
-                            var lastClause = ts.lastOrUndefined(caseBlock.clauses);
-                            if (lastClause) {
-                                return spanInNode(ts.lastOrUndefined(lastClause.statements));
-                            }
-                            return undefined;
-                        case 167:
-                            var bindingPattern = node.parent;
-                            return spanInNode(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
-                        default:
-                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
-                                var objectLiteral = node.parent;
-                                return textSpan(ts.lastOrUndefined(objectLiteral.properties) || objectLiteral);
-                            }
-                            return spanInNode(node.parent);
-                    }
-                }
-                function spanInCloseBracketToken(node) {
-                    switch (node.parent.kind) {
-                        case 168:
-                            var bindingPattern = node.parent;
-                            return textSpan(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
-                        default:
-                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
-                                var arrayLiteral = node.parent;
-                                return textSpan(ts.lastOrUndefined(arrayLiteral.elements) || arrayLiteral);
-                            }
-                            return spanInNode(node.parent);
-                    }
-                }
-                function spanInOpenParenToken(node) {
-                    if (node.parent.kind === 204 ||
-                        node.parent.kind === 174 ||
-                        node.parent.kind === 175) {
-                        return spanInPreviousNode(node);
-                    }
-                    if (node.parent.kind === 178) {
-                        return spanInNextNode(node);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInCloseParenToken(node) {
-                    switch (node.parent.kind) {
-                        case 179:
-                        case 220:
-                        case 180:
-                        case 147:
-                        case 146:
-                        case 149:
-                        case 150:
-                        case 148:
-                        case 205:
-                        case 204:
-                        case 206:
-                        case 208:
-                        case 174:
-                        case 175:
-                        case 178:
-                            return spanInPreviousNode(node);
-                        default:
-                            return spanInNode(node.parent);
-                    }
-                }
-                function spanInColonToken(node) {
-                    if (ts.isFunctionLike(node.parent) ||
-                        node.parent.kind === 253 ||
-                        node.parent.kind === 142) {
-                        return spanInPreviousNode(node);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInGreaterThanOrLessThanToken(node) {
-                    if (node.parent.kind === 177) {
-                        return spanInNextNode(node);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInWhileKeyword(node) {
-                    if (node.parent.kind === 204) {
-                        return textSpanEndingAtNextToken(node, node.parent.expression);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInOfKeyword(node) {
-                    if (node.parent.kind === 208) {
-                        return spanInNextNode(node);
-                    }
-                    return spanInNode(node.parent);
-                }
-            }
-        }
-        BreakpointResolver.spanInSourceFileAtLocation = spanInSourceFileAtLocation;
-    })(BreakpointResolver = ts.BreakpointResolver || (ts.BreakpointResolver = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var OutliningElementsCollector;
-    (function (OutliningElementsCollector) {
-        function collectElements(sourceFile) {
-            var elements = [];
-            var collapseText = "...";
-            function addOutliningSpan(hintSpanNode, startElement, endElement, autoCollapse) {
-                if (hintSpanNode && startElement && endElement) {
-                    var span = {
-                        textSpan: ts.createTextSpanFromBounds(startElement.pos, endElement.end),
-                        hintSpan: ts.createTextSpanFromBounds(hintSpanNode.getStart(), hintSpanNode.end),
-                        bannerText: collapseText,
-                        autoCollapse: autoCollapse
-                    };
-                    elements.push(span);
-                }
-            }
-            function addOutliningSpanComments(commentSpan, autoCollapse) {
-                if (commentSpan) {
-                    var span = {
-                        textSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
-                        hintSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
-                        bannerText: collapseText,
-                        autoCollapse: autoCollapse
-                    };
-                    elements.push(span);
-                }
-            }
-            function addOutliningForLeadingCommentsForNode(n) {
-                var comments = ts.getLeadingCommentRangesOfNode(n, sourceFile);
-                if (comments) {
-                    var firstSingleLineCommentStart = -1;
-                    var lastSingleLineCommentEnd = -1;
-                    var isFirstSingleLineComment = true;
-                    var singleLineCommentCount = 0;
-                    for (var _i = 0, comments_2 = comments; _i < comments_2.length; _i++) {
-                        var currentComment = comments_2[_i];
-                        if (currentComment.kind === 2) {
-                            if (isFirstSingleLineComment) {
-                                firstSingleLineCommentStart = currentComment.pos;
-                            }
-                            isFirstSingleLineComment = false;
-                            lastSingleLineCommentEnd = currentComment.end;
-                            singleLineCommentCount++;
-                        }
-                        else if (currentComment.kind === 3) {
-                            combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
-                            addOutliningSpanComments(currentComment, false);
-                            singleLineCommentCount = 0;
-                            lastSingleLineCommentEnd = -1;
-                            isFirstSingleLineComment = true;
-                        }
-                    }
-                    combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
-                }
-            }
-            function combineAndAddMultipleSingleLineComments(count, start, end) {
-                if (count > 1) {
-                    var multipleSingleLineComments = {
-                        pos: start,
-                        end: end,
-                        kind: 2
-                    };
-                    addOutliningSpanComments(multipleSingleLineComments, false);
-                }
-            }
-            function autoCollapse(node) {
-                return ts.isFunctionBlock(node) && node.parent.kind !== 180;
-            }
-            var depth = 0;
-            var maxDepth = 20;
-            function walk(n) {
-                if (depth > maxDepth) {
-                    return;
-                }
-                if (ts.isDeclaration(n)) {
-                    addOutliningForLeadingCommentsForNode(n);
-                }
-                switch (n.kind) {
-                    case 199:
-                        if (!ts.isFunctionBlock(n)) {
-                            var parent_14 = n.parent;
-                            var openBrace = ts.findChildOfKind(n, 15, sourceFile);
-                            var closeBrace = ts.findChildOfKind(n, 16, sourceFile);
-                            if (parent_14.kind === 204 ||
-                                parent_14.kind === 207 ||
-                                parent_14.kind === 208 ||
-                                parent_14.kind === 206 ||
-                                parent_14.kind === 203 ||
-                                parent_14.kind === 205 ||
-                                parent_14.kind === 212 ||
-                                parent_14.kind === 252) {
-                                addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
-                                break;
-                            }
-                            if (parent_14.kind === 216) {
-                                var tryStatement = parent_14;
-                                if (tryStatement.tryBlock === n) {
-                                    addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
-                                    break;
-                                }
-                                else if (tryStatement.finallyBlock === n) {
-                                    var finallyKeyword = ts.findChildOfKind(tryStatement, 85, sourceFile);
-                                    if (finallyKeyword) {
-                                        addOutliningSpan(finallyKeyword, openBrace, closeBrace, autoCollapse(n));
-                                        break;
-                                    }
-                                }
-                            }
-                            var span = ts.createTextSpanFromBounds(n.getStart(), n.end);
-                            elements.push({
-                                textSpan: span,
-                                hintSpan: span,
-                                bannerText: collapseText,
-                                autoCollapse: autoCollapse(n)
-                            });
-                            break;
-                        }
-                    case 226: {
-                        var openBrace = ts.findChildOfKind(n, 15, sourceFile);
-                        var closeBrace = ts.findChildOfKind(n, 16, sourceFile);
-                        addOutliningSpan(n.parent, openBrace, closeBrace, autoCollapse(n));
-                        break;
-                    }
-                    case 221:
-                    case 222:
-                    case 224:
-                    case 171:
-                    case 227: {
-                        var openBrace = ts.findChildOfKind(n, 15, sourceFile);
-                        var closeBrace = ts.findChildOfKind(n, 16, sourceFile);
-                        addOutliningSpan(n, openBrace, closeBrace, autoCollapse(n));
-                        break;
-                    }
-                    case 170:
-                        var openBracket = ts.findChildOfKind(n, 19, sourceFile);
-                        var closeBracket = ts.findChildOfKind(n, 20, sourceFile);
-                        addOutliningSpan(n, openBracket, closeBracket, autoCollapse(n));
-                        break;
-                }
-                depth++;
-                ts.forEachChild(n, walk);
-                depth--;
-            }
-            walk(sourceFile);
-            return elements;
-        }
-        OutliningElementsCollector.collectElements = collectElements;
-    })(OutliningElementsCollector = ts.OutliningElementsCollector || (ts.OutliningElementsCollector = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var NavigateTo;
-    (function (NavigateTo) {
-        function getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount) {
-            var patternMatcher = ts.createPatternMatcher(searchValue);
-            var rawItems = [];
-            var baseSensitivity = { sensitivity: "base" };
-            ts.forEach(program.getSourceFiles(), function (sourceFile) {
-                cancellationToken.throwIfCancellationRequested();
-                var nameToDeclarations = sourceFile.getNamedDeclarations();
-                for (var name_34 in nameToDeclarations) {
-                    var declarations = ts.getProperty(nameToDeclarations, name_34);
-                    if (declarations) {
-                        var matches = patternMatcher.getMatchesForLastSegmentOfPattern(name_34);
-                        if (!matches) {
-                            continue;
-                        }
-                        for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
-                            var declaration = declarations_7[_i];
-                            if (patternMatcher.patternContainsDots) {
-                                var containers = getContainers(declaration);
-                                if (!containers) {
-                                    return undefined;
-                                }
-                                matches = patternMatcher.getMatches(containers, name_34);
-                                if (!matches) {
-                                    continue;
-                                }
-                            }
-                            var fileName = sourceFile.fileName;
-                            var matchKind = bestMatchKind(matches);
-                            rawItems.push({ name: name_34, fileName: fileName, matchKind: matchKind, isCaseSensitive: allMatchesAreCaseSensitive(matches), declaration: declaration });
-                        }
-                    }
-                }
-            });
-            rawItems = ts.filter(rawItems, function (item) {
-                var decl = item.declaration;
-                if (decl.kind === 231 || decl.kind === 234 || decl.kind === 229) {
-                    var importer = checker.getSymbolAtLocation(decl.name);
-                    var imported = checker.getAliasedSymbol(importer);
-                    return importer.name !== imported.name;
-                }
-                else {
-                    return true;
-                }
-            });
-            rawItems.sort(compareNavigateToItems);
-            if (maxResultCount !== undefined) {
-                rawItems = rawItems.slice(0, maxResultCount);
-            }
-            var items = ts.map(rawItems, createNavigateToItem);
-            return items;
-            function allMatchesAreCaseSensitive(matches) {
-                ts.Debug.assert(matches.length > 0);
-                for (var _i = 0, matches_1 = matches; _i < matches_1.length; _i++) {
-                    var match = matches_1[_i];
-                    if (!match.isCaseSensitive) {
-                        return false;
-                    }
-                }
-                return true;
-            }
-            function getTextOfIdentifierOrLiteral(node) {
-                if (node) {
-                    if (node.kind === 69 ||
-                        node.kind === 9 ||
-                        node.kind === 8) {
-                        return node.text;
-                    }
-                }
-                return undefined;
-            }
-            function tryAddSingleDeclarationName(declaration, containers) {
-                if (declaration && declaration.name) {
-                    var text = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (text !== undefined) {
-                        containers.unshift(text);
-                    }
-                    else if (declaration.name.kind === 140) {
-                        return tryAddComputedPropertyName(declaration.name.expression, containers, true);
-                    }
-                    else {
-                        return false;
-                    }
-                }
-                return true;
-            }
-            function tryAddComputedPropertyName(expression, containers, includeLastPortion) {
-                var text = getTextOfIdentifierOrLiteral(expression);
-                if (text !== undefined) {
-                    if (includeLastPortion) {
-                        containers.unshift(text);
-                    }
-                    return true;
-                }
-                if (expression.kind === 172) {
-                    var propertyAccess = expression;
-                    if (includeLastPortion) {
-                        containers.unshift(propertyAccess.name.text);
-                    }
-                    return tryAddComputedPropertyName(propertyAccess.expression, containers, true);
-                }
-                return false;
-            }
-            function getContainers(declaration) {
-                var containers = [];
-                if (declaration.name.kind === 140) {
-                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, false)) {
-                        return undefined;
-                    }
-                }
-                declaration = ts.getContainerNode(declaration);
-                while (declaration) {
-                    if (!tryAddSingleDeclarationName(declaration, containers)) {
-                        return undefined;
-                    }
-                    declaration = ts.getContainerNode(declaration);
-                }
-                return containers;
-            }
-            function bestMatchKind(matches) {
-                ts.Debug.assert(matches.length > 0);
-                var bestMatchKind = ts.PatternMatchKind.camelCase;
-                for (var _i = 0, matches_2 = matches; _i < matches_2.length; _i++) {
-                    var match = matches_2[_i];
-                    var kind = match.kind;
-                    if (kind < bestMatchKind) {
-                        bestMatchKind = kind;
-                    }
-                }
-                return bestMatchKind;
-            }
-            function compareNavigateToItems(i1, i2) {
-                return i1.matchKind - i2.matchKind ||
-                    i1.name.localeCompare(i2.name, undefined, baseSensitivity) ||
-                    i1.name.localeCompare(i2.name);
-            }
-            function createNavigateToItem(rawItem) {
-                var declaration = rawItem.declaration;
-                var container = ts.getContainerNode(declaration);
-                return {
-                    name: rawItem.name,
-                    kind: ts.getNodeKind(declaration),
-                    kindModifiers: ts.getNodeModifiers(declaration),
-                    matchKind: ts.PatternMatchKind[rawItem.matchKind],
-                    isCaseSensitive: rawItem.isCaseSensitive,
-                    fileName: rawItem.fileName,
-                    textSpan: ts.createTextSpanFromBounds(declaration.getStart(), declaration.getEnd()),
-                    containerName: container && container.name ? container.name.text : "",
-                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
-                };
-            }
-        }
-        NavigateTo.getNavigateToItems = getNavigateToItems;
-    })(NavigateTo = ts.NavigateTo || (ts.NavigateTo = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var NavigationBar;
-    (function (NavigationBar) {
-        function getNavigationBarItems(sourceFile, compilerOptions) {
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                return getJsNavigationBarItems(sourceFile, compilerOptions);
-            }
-            var hasGlobalNode = false;
-            return getItemsWorker(getTopLevelNodes(sourceFile), createTopLevelItem);
-            function getIndent(node) {
-                var indent = hasGlobalNode ? 1 : 0;
-                var current = node.parent;
-                while (current) {
-                    switch (current.kind) {
-                        case 225:
-                            do {
-                                current = current.parent;
-                            } while (current.kind === 225);
-                        case 221:
-                        case 224:
-                        case 222:
-                        case 220:
-                            indent++;
-                    }
-                    current = current.parent;
-                }
-                return indent;
-            }
-            function getChildNodes(nodes) {
-                var childNodes = [];
-                function visit(node) {
-                    switch (node.kind) {
-                        case 200:
-                            ts.forEach(node.declarationList.declarations, visit);
-                            break;
-                        case 167:
-                        case 168:
-                            ts.forEach(node.elements, visit);
-                            break;
-                        case 236:
-                            if (node.exportClause) {
-                                ts.forEach(node.exportClause.elements, visit);
-                            }
-                            break;
-                        case 230:
-                            var importClause = node.importClause;
-                            if (importClause) {
-                                if (importClause.name) {
-                                    childNodes.push(importClause);
-                                }
-                                if (importClause.namedBindings) {
-                                    if (importClause.namedBindings.kind === 232) {
-                                        childNodes.push(importClause.namedBindings);
-                                    }
-                                    else {
-                                        ts.forEach(importClause.namedBindings.elements, visit);
-                                    }
-                                }
-                            }
-                            break;
-                        case 169:
-                        case 218:
-                            if (ts.isBindingPattern(node.name)) {
-                                visit(node.name);
-                                break;
-                            }
-                        case 221:
-                        case 224:
-                        case 222:
-                        case 225:
-                        case 220:
-                        case 229:
-                        case 234:
-                        case 238:
-                            childNodes.push(node);
-                            break;
-                    }
-                }
-                ts.forEach(nodes, visit);
-                return sortNodes(childNodes);
-            }
-            function getTopLevelNodes(node) {
-                var topLevelNodes = [];
-                topLevelNodes.push(node);
-                addTopLevelNodes(node.statements, topLevelNodes);
-                return topLevelNodes;
-            }
-            function sortNodes(nodes) {
-                return nodes.slice(0).sort(function (n1, n2) {
-                    if (n1.name && n2.name) {
-                        return ts.getPropertyNameForPropertyNameNode(n1.name).localeCompare(ts.getPropertyNameForPropertyNameNode(n2.name));
-                    }
-                    else if (n1.name) {
-                        return 1;
-                    }
-                    else if (n2.name) {
-                        return -1;
-                    }
-                    else {
-                        return n1.kind - n2.kind;
-                    }
-                });
-            }
-            function addTopLevelNodes(nodes, topLevelNodes) {
-                nodes = sortNodes(nodes);
-                for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
-                    var node = nodes_4[_i];
-                    switch (node.kind) {
-                        case 221:
-                            topLevelNodes.push(node);
-                            for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                                var member = _b[_a];
-                                if (member.kind === 147 || member.kind === 148) {
-                                    if (member.body) {
-                                        if (hasNamedFunctionDeclarations(member.body.statements)) {
-                                            topLevelNodes.push(member);
-                                        }
-                                        addTopLevelNodes(member.body.statements, topLevelNodes);
-                                    }
-                                }
-                            }
-                            break;
-                        case 224:
-                        case 222:
-                        case 223:
-                            topLevelNodes.push(node);
-                            break;
-                        case 225:
-                            var moduleDeclaration = node;
-                            topLevelNodes.push(node);
-                            addTopLevelNodes(getInnermostModule(moduleDeclaration).body.statements, topLevelNodes);
-                            break;
-                        case 220:
-                            var functionDeclaration = node;
-                            if (isTopLevelFunctionDeclaration(functionDeclaration)) {
-                                topLevelNodes.push(node);
-                                addTopLevelNodes(functionDeclaration.body.statements, topLevelNodes);
-                            }
-                            break;
-                    }
-                }
-            }
-            function hasNamedFunctionDeclarations(nodes) {
-                for (var _i = 0, nodes_5 = nodes; _i < nodes_5.length; _i++) {
-                    var s = nodes_5[_i];
-                    if (s.kind === 220 && !isEmpty(s.name.text)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function isTopLevelFunctionDeclaration(functionDeclaration) {
-                if (functionDeclaration.kind === 220) {
-                    if (functionDeclaration.body && functionDeclaration.body.kind === 199) {
-                        if (hasNamedFunctionDeclarations(functionDeclaration.body.statements)) {
-                            return true;
-                        }
-                        if (!ts.isFunctionBlock(functionDeclaration.parent)) {
-                            return true;
-                        }
-                        else {
-                            var grandParentKind = functionDeclaration.parent.parent.kind;
-                            if (grandParentKind === 147 ||
-                                grandParentKind === 148) {
-                                return true;
-                            }
-                        }
-                    }
-                }
-                return false;
-            }
-            function getItemsWorker(nodes, createItem) {
-                var items = [];
-                var keyToItem = {};
-                for (var _i = 0, nodes_6 = nodes; _i < nodes_6.length; _i++) {
-                    var child = nodes_6[_i];
-                    var item = createItem(child);
-                    if (item !== undefined) {
-                        if (item.text.length > 0) {
-                            var key = item.text + "-" + item.kind + "-" + item.indent;
-                            var itemWithSameName = keyToItem[key];
-                            if (itemWithSameName) {
-                                merge(itemWithSameName, item);
-                            }
-                            else {
-                                keyToItem[key] = item;
-                                items.push(item);
-                            }
-                        }
-                    }
-                }
-                return items;
-            }
-            function merge(target, source) {
-                ts.addRange(target.spans, source.spans);
-                if (source.childItems) {
-                    if (!target.childItems) {
-                        target.childItems = [];
-                    }
-                    outer: for (var _i = 0, _a = source.childItems; _i < _a.length; _i++) {
-                        var sourceChild = _a[_i];
-                        for (var _b = 0, _c = target.childItems; _b < _c.length; _b++) {
-                            var targetChild = _c[_b];
-                            if (targetChild.text === sourceChild.text && targetChild.kind === sourceChild.kind) {
-                                merge(targetChild, sourceChild);
-                                continue outer;
-                            }
-                        }
-                        target.childItems.push(sourceChild);
-                    }
-                }
-            }
-            function createChildItem(node) {
-                switch (node.kind) {
-                    case 142:
-                        if (ts.isBindingPattern(node.name)) {
-                            break;
-                        }
-                        if ((node.flags & 1023) === 0) {
-                            return undefined;
-                        }
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
-                    case 147:
-                    case 146:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberFunctionElement);
-                    case 149:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberGetAccessorElement);
-                    case 150:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberSetAccessorElement);
-                    case 153:
-                        return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
-                    case 224:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.enumElement);
-                    case 255:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
-                    case 222:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.interfaceElement);
-                    case 151:
-                        return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
-                    case 152:
-                        return createItem(node, "new()", ts.ScriptElementKind.constructSignatureElement);
-                    case 145:
-                    case 144:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
-                    case 220:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.functionElement);
-                    case 218:
-                    case 169:
-                        var variableDeclarationNode = void 0;
-                        var name_35;
-                        if (node.kind === 169) {
-                            name_35 = node.name;
-                            variableDeclarationNode = node;
-                            while (variableDeclarationNode && variableDeclarationNode.kind !== 218) {
-                                variableDeclarationNode = variableDeclarationNode.parent;
-                            }
-                            ts.Debug.assert(variableDeclarationNode !== undefined);
-                        }
-                        else {
-                            ts.Debug.assert(!ts.isBindingPattern(node.name));
-                            variableDeclarationNode = node;
-                            name_35 = node.name;
-                        }
-                        if (ts.isConst(variableDeclarationNode)) {
-                            return createItem(node, getTextOfNode(name_35), ts.ScriptElementKind.constElement);
-                        }
-                        else if (ts.isLet(variableDeclarationNode)) {
-                            return createItem(node, getTextOfNode(name_35), ts.ScriptElementKind.letElement);
-                        }
-                        else {
-                            return createItem(node, getTextOfNode(name_35), ts.ScriptElementKind.variableElement);
-                        }
-                    case 148:
-                        return createItem(node, "constructor", ts.ScriptElementKind.constructorImplementationElement);
-                    case 238:
-                    case 234:
-                    case 229:
-                    case 231:
-                    case 232:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.alias);
-                }
-                return undefined;
-                function createItem(node, name, scriptElementKind) {
-                    return getNavigationBarItem(name, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)]);
-                }
-            }
-            function isEmpty(text) {
-                return !text || text.trim() === "";
-            }
-            function getNavigationBarItem(text, kind, kindModifiers, spans, childItems, indent) {
-                if (childItems === void 0) { childItems = []; }
-                if (indent === void 0) { indent = 0; }
-                if (isEmpty(text)) {
-                    return undefined;
-                }
-                return {
-                    text: text,
-                    kind: kind,
-                    kindModifiers: kindModifiers,
-                    spans: spans,
-                    childItems: childItems,
-                    indent: indent,
-                    bolded: false,
-                    grayed: false
-                };
-            }
-            function createTopLevelItem(node) {
-                switch (node.kind) {
-                    case 256:
-                        return createSourceFileItem(node);
-                    case 221:
-                        return createClassItem(node);
-                    case 147:
-                    case 148:
-                        return createMemberFunctionLikeItem(node);
-                    case 224:
-                        return createEnumItem(node);
-                    case 222:
-                        return createInterfaceItem(node);
-                    case 225:
-                        return createModuleItem(node);
-                    case 220:
-                        return createFunctionItem(node);
-                    case 223:
-                        return createTypeAliasItem(node);
-                }
-                return undefined;
-                function getModuleName(moduleDeclaration) {
-                    if (ts.isAmbientModule(moduleDeclaration)) {
-                        return getTextOfNode(moduleDeclaration.name);
-                    }
-                    var result = [];
-                    result.push(moduleDeclaration.name.text);
-                    while (moduleDeclaration.body && moduleDeclaration.body.kind === 225) {
-                        moduleDeclaration = moduleDeclaration.body;
-                        result.push(moduleDeclaration.name.text);
-                    }
-                    return result.join(".");
-                }
-                function createModuleItem(node) {
-                    var moduleName = getModuleName(node);
-                    var childItems = getItemsWorker(getChildNodes(getInnermostModule(node).body.statements), createChildItem);
-                    return getNavigationBarItem(moduleName, ts.ScriptElementKind.moduleElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-                function createFunctionItem(node) {
-                    if (node.body && node.body.kind === 199) {
-                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
-                        return getNavigationBarItem(!node.name ? "default" : node.name.text, ts.ScriptElementKind.functionElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                    }
-                    return undefined;
-                }
-                function createTypeAliasItem(node) {
-                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.typeElement, ts.getNodeModifiers(node), [getNodeSpan(node)], [], getIndent(node));
-                }
-                function createMemberFunctionLikeItem(node) {
-                    if (node.body && node.body.kind === 199) {
-                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
-                        var scriptElementKind = void 0;
-                        var memberFunctionName = void 0;
-                        if (node.kind === 147) {
-                            memberFunctionName = ts.getPropertyNameForPropertyNameNode(node.name);
-                            scriptElementKind = ts.ScriptElementKind.memberFunctionElement;
-                        }
-                        else {
-                            memberFunctionName = "constructor";
-                            scriptElementKind = ts.ScriptElementKind.constructorImplementationElement;
-                        }
-                        return getNavigationBarItem(memberFunctionName, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                    }
-                    return undefined;
-                }
-                function createSourceFileItem(node) {
-                    var childItems = getItemsWorker(getChildNodes(node.statements), createChildItem);
-                    if (childItems === undefined || childItems.length === 0) {
-                        return undefined;
-                    }
-                    hasGlobalNode = true;
-                    var rootName = ts.isExternalModule(node)
-                        ? "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(node.fileName)))) + "\""
-                        : "<global>";
-                    return getNavigationBarItem(rootName, ts.ScriptElementKind.moduleElement, ts.ScriptElementKindModifier.none, [getNodeSpan(node)], childItems);
-                }
-                function createClassItem(node) {
-                    var childItems;
-                    if (node.members) {
-                        var constructor = ts.forEach(node.members, function (member) {
-                            return member.kind === 148 && member;
-                        });
-                        var nodes = removeDynamicallyNamedProperties(node);
-                        if (constructor) {
-                            ts.addRange(nodes, ts.filter(constructor.parameters, function (p) { return !ts.isBindingPattern(p.name); }));
-                        }
-                        childItems = getItemsWorker(sortNodes(nodes), createChildItem);
-                    }
-                    var nodeName = !node.name ? "default" : node.name.text;
-                    return getNavigationBarItem(nodeName, ts.ScriptElementKind.classElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-                function createEnumItem(node) {
-                    var childItems = getItemsWorker(sortNodes(removeComputedProperties(node)), createChildItem);
-                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.enumElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-                function createInterfaceItem(node) {
-                    var childItems = getItemsWorker(sortNodes(removeDynamicallyNamedProperties(node)), createChildItem);
-                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.interfaceElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-            }
-            function removeComputedProperties(node) {
-                return ts.filter(node.members, function (member) { return member.name === undefined || member.name.kind !== 140; });
-            }
-            function removeDynamicallyNamedProperties(node) {
-                return ts.filter(node.members, function (member) { return !ts.hasDynamicName(member); });
-            }
-            function getInnermostModule(node) {
-                while (node.body.kind === 225) {
-                    node = node.body;
-                }
-                return node;
-            }
-            function getNodeSpan(node) {
-                return node.kind === 256
-                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
-            }
-            function getTextOfNode(node) {
-                return ts.getTextOfNodeFromSourceText(sourceFile.text, node);
-            }
-        }
-        NavigationBar.getNavigationBarItems = getNavigationBarItems;
-        function getJsNavigationBarItems(sourceFile, compilerOptions) {
-            var anonFnText = "<function>";
-            var anonClassText = "<class>";
-            var indent = 0;
-            var rootName = ts.isExternalModule(sourceFile) ?
-                "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(sourceFile.fileName)))) + "\""
-                : "<global>";
-            var sourceFileItem = getNavBarItem(rootName, ts.ScriptElementKind.moduleElement, [getNodeSpan(sourceFile)]);
-            var topItem = sourceFileItem;
-            ts.forEachChild(sourceFile, visitNode);
-            function visitNode(node) {
-                var newItem = createNavBarItem(node);
-                if (newItem) {
-                    topItem.childItems.push(newItem);
-                }
-                if (newItem && (ts.isFunctionLike(node) || ts.isClassLike(node))) {
-                    var lastTop = topItem;
-                    indent++;
-                    topItem = newItem;
-                    ts.forEachChild(node, visitNode);
-                    topItem = lastTop;
-                    indent--;
-                    if (newItem && newItem.text === anonFnText && newItem.childItems.length === 0) {
-                        topItem.childItems.pop();
-                    }
-                }
-                else {
-                    ts.forEachChild(node, visitNode);
-                }
-            }
-            function createNavBarItem(node) {
-                switch (node.kind) {
-                    case 218:
-                        if (node.parent.parent
-                            .parent.kind !== 256) {
-                            return undefined;
-                        }
-                        var varDecl = node;
-                        if (varDecl.initializer && (varDecl.initializer.kind === 179 ||
-                            varDecl.initializer.kind === 180 ||
-                            varDecl.initializer.kind === 192)) {
-                            return undefined;
-                        }
-                    case 220:
-                    case 221:
-                    case 148:
-                    case 149:
-                    case 150:
-                        var name_36 = node.flags && (node.flags & 512) && !node.name ? "default" :
-                            node.kind === 148 ? "constructor" :
-                                ts.declarationNameToString(node.name);
-                        return getNavBarItem(name_36, getScriptKindForElementKind(node.kind), [getNodeSpan(node)]);
-                    case 179:
-                    case 180:
-                    case 192:
-                        return getDefineModuleItem(node) || getFunctionOrClassExpressionItem(node);
-                    case 147:
-                        var methodDecl = node;
-                        return getNavBarItem(ts.declarationNameToString(methodDecl.name), ts.ScriptElementKind.memberFunctionElement, [getNodeSpan(node)]);
-                    case 235:
-                        return getNavBarItem("default", ts.ScriptElementKind.variableElement, [getNodeSpan(node)]);
-                    case 231:
-                        if (!node.name) {
-                            return undefined;
-                        }
-                    case 234:
-                    case 232:
-                    case 238:
-                        if (node.kind === 238) {
-                            if (!node.parent.parent.moduleSpecifier && !node.propertyName) {
-                                return undefined;
-                            }
-                        }
-                        var decl = node;
-                        if (!decl.name) {
-                            return undefined;
-                        }
-                        var declName = ts.declarationNameToString(decl.name);
-                        return getNavBarItem(declName, ts.ScriptElementKind.constElement, [getNodeSpan(node)]);
-                    default:
-                        return undefined;
-                }
-            }
-            function getNavBarItem(text, kind, spans, kindModifiers) {
-                if (kindModifiers === void 0) { kindModifiers = ts.ScriptElementKindModifier.none; }
-                return {
-                    text: text, kind: kind, kindModifiers: kindModifiers, spans: spans, childItems: [], indent: indent, bolded: false, grayed: false
-                };
-            }
-            function getDefineModuleItem(node) {
-                if (node.kind !== 179 && node.kind !== 180) {
-                    return undefined;
-                }
-                if (node.parent.kind !== 174) {
-                    return undefined;
-                }
-                var callExpr = node.parent;
-                if (callExpr.expression.kind !== 69 || callExpr.expression.getText() !== "define") {
-                    return undefined;
-                }
-                var defaultName = node.getSourceFile().fileName;
-                if (callExpr.arguments[0].kind === 9) {
-                    defaultName = (callExpr.arguments[0]).text;
-                }
-                return getNavBarItem(defaultName, ts.ScriptElementKind.moduleElement, [getNodeSpan(node.parent)]);
-            }
-            function getFunctionOrClassExpressionItem(node) {
-                if (node.kind !== 179 &&
-                    node.kind !== 180 &&
-                    node.kind !== 192) {
-                    return undefined;
-                }
-                var fnExpr = node;
-                var fnName;
-                if (fnExpr.name && ts.getFullWidth(fnExpr.name) > 0) {
-                    fnName = ts.declarationNameToString(fnExpr.name);
-                }
-                else {
-                    if (fnExpr.parent.kind === 218) {
-                        fnName = ts.declarationNameToString(fnExpr.parent.name);
-                    }
-                    else if (fnExpr.parent.kind === 187 &&
-                        fnExpr.parent.operatorToken.kind === 56) {
-                        fnName = fnExpr.parent.left.getText();
-                    }
-                    else if (fnExpr.parent.kind === 253 &&
-                        fnExpr.parent.name) {
-                        fnName = fnExpr.parent.name.getText();
-                    }
-                    else {
-                        fnName = node.kind === 192 ? anonClassText : anonFnText;
-                    }
-                }
-                var scriptKind = node.kind === 192 ? ts.ScriptElementKind.classElement : ts.ScriptElementKind.functionElement;
-                return getNavBarItem(fnName, scriptKind, [getNodeSpan(node)]);
-            }
-            function getNodeSpan(node) {
-                return node.kind === 256
-                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
-            }
-            function getScriptKindForElementKind(kind) {
-                switch (kind) {
-                    case 218:
-                        return ts.ScriptElementKind.variableElement;
-                    case 220:
-                        return ts.ScriptElementKind.functionElement;
-                    case 221:
-                        return ts.ScriptElementKind.classElement;
-                    case 148:
-                        return ts.ScriptElementKind.constructorImplementationElement;
-                    case 149:
-                        return ts.ScriptElementKind.memberGetAccessorElement;
-                    case 150:
-                        return ts.ScriptElementKind.memberSetAccessorElement;
-                    default:
-                        return "unknown";
-                }
-            }
-            return sourceFileItem.childItems;
-        }
-        NavigationBar.getJsNavigationBarItems = getJsNavigationBarItems;
-    })(NavigationBar = ts.NavigationBar || (ts.NavigationBar = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    (function (PatternMatchKind) {
-        PatternMatchKind[PatternMatchKind["exact"] = 0] = "exact";
-        PatternMatchKind[PatternMatchKind["prefix"] = 1] = "prefix";
-        PatternMatchKind[PatternMatchKind["substring"] = 2] = "substring";
-        PatternMatchKind[PatternMatchKind["camelCase"] = 3] = "camelCase";
-    })(ts.PatternMatchKind || (ts.PatternMatchKind = {}));
-    var PatternMatchKind = ts.PatternMatchKind;
-    function createPatternMatch(kind, punctuationStripped, isCaseSensitive, camelCaseWeight) {
-        return {
-            kind: kind,
-            punctuationStripped: punctuationStripped,
-            isCaseSensitive: isCaseSensitive,
-            camelCaseWeight: camelCaseWeight
-        };
-    }
-    function createPatternMatcher(pattern) {
-        var stringToWordSpans = {};
-        pattern = pattern.trim();
-        var dotSeparatedSegments = pattern.split(".").map(function (p) { return createSegment(p.trim()); });
-        var invalidPattern = dotSeparatedSegments.length === 0 || ts.forEach(dotSeparatedSegments, segmentIsInvalid);
-        return {
-            getMatches: getMatches,
-            getMatchesForLastSegmentOfPattern: getMatchesForLastSegmentOfPattern,
-            patternContainsDots: dotSeparatedSegments.length > 1
-        };
-        function skipMatch(candidate) {
-            return invalidPattern || !candidate;
-        }
-        function getMatchesForLastSegmentOfPattern(candidate) {
-            if (skipMatch(candidate)) {
-                return undefined;
-            }
-            return matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
-        }
-        function getMatches(candidateContainers, candidate) {
-            if (skipMatch(candidate)) {
-                return undefined;
-            }
-            var candidateMatch = matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
-            if (!candidateMatch) {
-                return undefined;
-            }
-            candidateContainers = candidateContainers || [];
-            if (dotSeparatedSegments.length - 1 > candidateContainers.length) {
-                return undefined;
-            }
-            var totalMatch = candidateMatch;
-            for (var i = dotSeparatedSegments.length - 2, j = candidateContainers.length - 1; i >= 0; i -= 1, j -= 1) {
-                var segment = dotSeparatedSegments[i];
-                var containerName = candidateContainers[j];
-                var containerMatch = matchSegment(containerName, segment);
-                if (!containerMatch) {
-                    return undefined;
-                }
-                ts.addRange(totalMatch, containerMatch);
-            }
-            return totalMatch;
-        }
-        function getWordSpans(word) {
-            if (!ts.hasProperty(stringToWordSpans, word)) {
-                stringToWordSpans[word] = breakIntoWordSpans(word);
-            }
-            return stringToWordSpans[word];
-        }
-        function matchTextChunk(candidate, chunk, punctuationStripped) {
-            var index = indexOfIgnoringCase(candidate, chunk.textLowerCase);
-            if (index === 0) {
-                if (chunk.text.length === candidate.length) {
-                    return createPatternMatch(PatternMatchKind.exact, punctuationStripped, candidate === chunk.text);
-                }
-                else {
-                    return createPatternMatch(PatternMatchKind.prefix, punctuationStripped, startsWith(candidate, chunk.text));
-                }
-            }
-            var isLowercase = chunk.isLowerCase;
-            if (isLowercase) {
-                if (index > 0) {
-                    var wordSpans = getWordSpans(candidate);
-                    for (var _i = 0, wordSpans_1 = wordSpans; _i < wordSpans_1.length; _i++) {
-                        var span = wordSpans_1[_i];
-                        if (partStartsWith(candidate, span, chunk.text, true)) {
-                            return createPatternMatch(PatternMatchKind.substring, punctuationStripped, partStartsWith(candidate, span, chunk.text, false));
-                        }
-                    }
-                }
-            }
-            else {
-                if (candidate.indexOf(chunk.text) > 0) {
-                    return createPatternMatch(PatternMatchKind.substring, punctuationStripped, true);
-                }
-            }
-            if (!isLowercase) {
-                if (chunk.characterSpans.length > 0) {
-                    var candidateParts = getWordSpans(candidate);
-                    var camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, false);
-                    if (camelCaseWeight !== undefined) {
-                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, true, camelCaseWeight);
-                    }
-                    camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, true);
-                    if (camelCaseWeight !== undefined) {
-                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, false, camelCaseWeight);
-                    }
-                }
-            }
-            if (isLowercase) {
-                if (chunk.text.length < candidate.length) {
-                    if (index > 0 && isUpperCaseLetter(candidate.charCodeAt(index))) {
-                        return createPatternMatch(PatternMatchKind.substring, punctuationStripped, false);
-                    }
-                }
-            }
-            return undefined;
-        }
-        function containsSpaceOrAsterisk(text) {
-            for (var i = 0; i < text.length; i++) {
-                var ch = text.charCodeAt(i);
-                if (ch === 32 || ch === 42) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function matchSegment(candidate, segment) {
-            if (!containsSpaceOrAsterisk(segment.totalTextChunk.text)) {
-                var match = matchTextChunk(candidate, segment.totalTextChunk, false);
-                if (match) {
-                    return [match];
-                }
-            }
-            var subWordTextChunks = segment.subWordTextChunks;
-            var matches = undefined;
-            for (var _i = 0, subWordTextChunks_1 = subWordTextChunks; _i < subWordTextChunks_1.length; _i++) {
-                var subWordTextChunk = subWordTextChunks_1[_i];
-                var result = matchTextChunk(candidate, subWordTextChunk, true);
-                if (!result) {
-                    return undefined;
-                }
-                matches = matches || [];
-                matches.push(result);
-            }
-            return matches;
-        }
-        function partStartsWith(candidate, candidateSpan, pattern, ignoreCase, patternSpan) {
-            var patternPartStart = patternSpan ? patternSpan.start : 0;
-            var patternPartLength = patternSpan ? patternSpan.length : pattern.length;
-            if (patternPartLength > candidateSpan.length) {
-                return false;
-            }
-            if (ignoreCase) {
-                for (var i = 0; i < patternPartLength; i++) {
-                    var ch1 = pattern.charCodeAt(patternPartStart + i);
-                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
-                    if (toLowerCase(ch1) !== toLowerCase(ch2)) {
-                        return false;
-                    }
-                }
-            }
-            else {
-                for (var i = 0; i < patternPartLength; i++) {
-                    var ch1 = pattern.charCodeAt(patternPartStart + i);
-                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
-                    if (ch1 !== ch2) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        function tryCamelCaseMatch(candidate, candidateParts, chunk, ignoreCase) {
-            var chunkCharacterSpans = chunk.characterSpans;
-            var currentCandidate = 0;
-            var currentChunkSpan = 0;
-            var firstMatch = undefined;
-            var contiguous = undefined;
-            while (true) {
-                if (currentChunkSpan === chunkCharacterSpans.length) {
-                    var weight = 0;
-                    if (contiguous) {
-                        weight += 1;
-                    }
-                    if (firstMatch === 0) {
-                        weight += 2;
-                    }
-                    return weight;
-                }
-                else if (currentCandidate === candidateParts.length) {
-                    return undefined;
-                }
-                var candidatePart = candidateParts[currentCandidate];
-                var gotOneMatchThisCandidate = false;
-                for (; currentChunkSpan < chunkCharacterSpans.length; currentChunkSpan++) {
-                    var chunkCharacterSpan = chunkCharacterSpans[currentChunkSpan];
-                    if (gotOneMatchThisCandidate) {
-                        if (!isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan - 1].start)) ||
-                            !isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan].start))) {
-                            break;
-                        }
-                    }
-                    if (!partStartsWith(candidate, candidatePart, chunk.text, ignoreCase, chunkCharacterSpan)) {
-                        break;
-                    }
-                    gotOneMatchThisCandidate = true;
-                    firstMatch = firstMatch === undefined ? currentCandidate : firstMatch;
-                    contiguous = contiguous === undefined ? true : contiguous;
-                    candidatePart = ts.createTextSpan(candidatePart.start + chunkCharacterSpan.length, candidatePart.length - chunkCharacterSpan.length);
-                }
-                if (!gotOneMatchThisCandidate && contiguous !== undefined) {
-                    contiguous = false;
-                }
-                currentCandidate++;
-            }
-        }
-    }
-    ts.createPatternMatcher = createPatternMatcher;
-    function createSegment(text) {
-        return {
-            totalTextChunk: createTextChunk(text),
-            subWordTextChunks: breakPatternIntoTextChunks(text)
-        };
-    }
-    function segmentIsInvalid(segment) {
-        return segment.subWordTextChunks.length === 0;
-    }
-    function isUpperCaseLetter(ch) {
-        if (ch >= 65 && ch <= 90) {
-            return true;
-        }
-        if (ch < 127 || !ts.isUnicodeIdentifierStart(ch, 2)) {
-            return false;
-        }
-        var str = String.fromCharCode(ch);
-        return str === str.toUpperCase();
-    }
-    function isLowerCaseLetter(ch) {
-        if (ch >= 97 && ch <= 122) {
-            return true;
-        }
-        if (ch < 127 || !ts.isUnicodeIdentifierStart(ch, 2)) {
-            return false;
-        }
-        var str = String.fromCharCode(ch);
-        return str === str.toLowerCase();
-    }
-    function startsWith(string, search) {
-        for (var i = 0, n = search.length; i < n; i++) {
-            if (string.charCodeAt(i) !== search.charCodeAt(i)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function indexOfIgnoringCase(string, value) {
-        for (var i = 0, n = string.length - value.length; i <= n; i++) {
-            if (startsWithIgnoringCase(string, value, i)) {
-                return i;
-            }
-        }
-        return -1;
-    }
-    function startsWithIgnoringCase(string, value, start) {
-        for (var i = 0, n = value.length; i < n; i++) {
-            var ch1 = toLowerCase(string.charCodeAt(i + start));
-            var ch2 = value.charCodeAt(i);
-            if (ch1 !== ch2) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function toLowerCase(ch) {
-        if (ch >= 65 && ch <= 90) {
-            return 97 + (ch - 65);
-        }
-        if (ch < 127) {
-            return ch;
-        }
-        return String.fromCharCode(ch).toLowerCase().charCodeAt(0);
-    }
-    function isDigit(ch) {
-        return ch >= 48 && ch <= 57;
-    }
-    function isWordChar(ch) {
-        return isUpperCaseLetter(ch) || isLowerCaseLetter(ch) || isDigit(ch) || ch === 95 || ch === 36;
-    }
-    function breakPatternIntoTextChunks(pattern) {
-        var result = [];
-        var wordStart = 0;
-        var wordLength = 0;
-        for (var i = 0; i < pattern.length; i++) {
-            var ch = pattern.charCodeAt(i);
-            if (isWordChar(ch)) {
-                if (wordLength === 0) {
-                    wordStart = i;
-                }
-                wordLength++;
-            }
-            else {
-                if (wordLength > 0) {
-                    result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
-                    wordLength = 0;
-                }
-            }
-        }
-        if (wordLength > 0) {
-            result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
-        }
-        return result;
-    }
-    function createTextChunk(text) {
-        var textLowerCase = text.toLowerCase();
-        return {
-            text: text,
-            textLowerCase: textLowerCase,
-            isLowerCase: text === textLowerCase,
-            characterSpans: breakIntoCharacterSpans(text)
-        };
-    }
-    function breakIntoCharacterSpans(identifier) {
-        return breakIntoSpans(identifier, false);
-    }
-    ts.breakIntoCharacterSpans = breakIntoCharacterSpans;
-    function breakIntoWordSpans(identifier) {
-        return breakIntoSpans(identifier, true);
-    }
-    ts.breakIntoWordSpans = breakIntoWordSpans;
-    function breakIntoSpans(identifier, word) {
-        var result = [];
-        var wordStart = 0;
-        for (var i = 1, n = identifier.length; i < n; i++) {
-            var lastIsDigit = isDigit(identifier.charCodeAt(i - 1));
-            var currentIsDigit = isDigit(identifier.charCodeAt(i));
-            var hasTransitionFromLowerToUpper = transitionFromLowerToUpper(identifier, word, i);
-            var hasTransitionFromUpperToLower = transitionFromUpperToLower(identifier, word, i, wordStart);
-            if (charIsPunctuation(identifier.charCodeAt(i - 1)) ||
-                charIsPunctuation(identifier.charCodeAt(i)) ||
-                lastIsDigit !== currentIsDigit ||
-                hasTransitionFromLowerToUpper ||
-                hasTransitionFromUpperToLower) {
-                if (!isAllPunctuation(identifier, wordStart, i)) {
-                    result.push(ts.createTextSpan(wordStart, i - wordStart));
-                }
-                wordStart = i;
-            }
-        }
-        if (!isAllPunctuation(identifier, wordStart, identifier.length)) {
-            result.push(ts.createTextSpan(wordStart, identifier.length - wordStart));
-        }
-        return result;
-    }
-    function charIsPunctuation(ch) {
-        switch (ch) {
-            case 33:
-            case 34:
-            case 35:
-            case 37:
-            case 38:
-            case 39:
-            case 40:
-            case 41:
-            case 42:
-            case 44:
-            case 45:
-            case 46:
-            case 47:
-            case 58:
-            case 59:
-            case 63:
-            case 64:
-            case 91:
-            case 92:
-            case 93:
-            case 95:
-            case 123:
-            case 125:
-                return true;
-        }
-        return false;
-    }
-    function isAllPunctuation(identifier, start, end) {
-        for (var i = start; i < end; i++) {
-            var ch = identifier.charCodeAt(i);
-            if (!charIsPunctuation(ch) || ch === 95 || ch === 36) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function transitionFromUpperToLower(identifier, word, index, wordStart) {
-        if (word) {
-            if (index !== wordStart &&
-                index + 1 < identifier.length) {
-                var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
-                var nextIsLower = isLowerCaseLetter(identifier.charCodeAt(index + 1));
-                if (currentIsUpper && nextIsLower) {
-                    for (var i = wordStart; i < index; i++) {
-                        if (!isUpperCaseLetter(identifier.charCodeAt(i))) {
-                            return false;
-                        }
-                    }
-                    return true;
-                }
-            }
-        }
-        return false;
-    }
-    function transitionFromLowerToUpper(identifier, word, index) {
-        var lastIsUpper = isUpperCaseLetter(identifier.charCodeAt(index - 1));
-        var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
-        var transition = word
-            ? (currentIsUpper && !lastIsUpper)
-            : currentIsUpper;
-        return transition;
-    }
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var SignatureHelp;
-    (function (SignatureHelp) {
-        var emptyArray = [];
-        function getSignatureHelpItems(program, sourceFile, position, cancellationToken) {
-            var typeChecker = program.getTypeChecker();
-            var startingToken = ts.findTokenOnLeftOfPosition(sourceFile, position);
-            if (!startingToken) {
-                return undefined;
-            }
-            var argumentInfo = getContainingArgumentInfo(startingToken);
-            cancellationToken.throwIfCancellationRequested();
-            if (!argumentInfo) {
-                return undefined;
-            }
-            var call = argumentInfo.invocation;
-            var candidates = [];
-            var resolvedSignature = typeChecker.getResolvedSignature(call, candidates);
-            cancellationToken.throwIfCancellationRequested();
-            if (!candidates.length) {
-                if (ts.isSourceFileJavaScript(sourceFile)) {
-                    return createJavaScriptSignatureHelpItems(argumentInfo);
-                }
-                return undefined;
-            }
-            return createSignatureHelpItems(candidates, resolvedSignature, argumentInfo);
-            function createJavaScriptSignatureHelpItems(argumentInfo) {
-                if (argumentInfo.invocation.kind !== 174) {
-                    return undefined;
-                }
-                var callExpression = argumentInfo.invocation;
-                var expression = callExpression.expression;
-                var name = expression.kind === 69
-                    ? expression
-                    : expression.kind === 172
-                        ? expression.name
-                        : undefined;
-                if (!name || !name.text) {
-                    return undefined;
-                }
-                var typeChecker = program.getTypeChecker();
-                for (var _i = 0, _a = program.getSourceFiles(); _i < _a.length; _i++) {
-                    var sourceFile_1 = _a[_i];
-                    var nameToDeclarations = sourceFile_1.getNamedDeclarations();
-                    var declarations = ts.getProperty(nameToDeclarations, name.text);
-                    if (declarations) {
-                        for (var _b = 0, declarations_8 = declarations; _b < declarations_8.length; _b++) {
-                            var declaration = declarations_8[_b];
-                            var symbol = declaration.symbol;
-                            if (symbol) {
-                                var type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
-                                if (type) {
-                                    var callSignatures = type.getCallSignatures();
-                                    if (callSignatures && callSignatures.length) {
-                                        return createSignatureHelpItems(callSignatures, callSignatures[0], argumentInfo);
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            function getImmediatelyContainingArgumentInfo(node) {
-                if (node.parent.kind === 174 || node.parent.kind === 175) {
-                    var callExpression = node.parent;
-                    if (node.kind === 25 ||
-                        node.kind === 17) {
-                        var list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
-                        var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
-                        ts.Debug.assert(list !== undefined);
-                        return {
-                            kind: isTypeArgList ? 0 : 1,
-                            invocation: callExpression,
-                            argumentsSpan: getApplicableSpanForArguments(list),
-                            argumentIndex: 0,
-                            argumentCount: getArgumentCount(list)
-                        };
-                    }
-                    var listItemInfo = ts.findListItemInfo(node);
-                    if (listItemInfo) {
-                        var list = listItemInfo.list;
-                        var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
-                        var argumentIndex = getArgumentIndex(list, node);
-                        var argumentCount = getArgumentCount(list);
-                        ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
-                        return {
-                            kind: isTypeArgList ? 0 : 1,
-                            invocation: callExpression,
-                            argumentsSpan: getApplicableSpanForArguments(list),
-                            argumentIndex: argumentIndex,
-                            argumentCount: argumentCount
-                        };
-                    }
-                }
-                else if (node.kind === 11 && node.parent.kind === 176) {
-                    if (ts.isInsideTemplateLiteral(node, position)) {
-                        return getArgumentListInfoForTemplate(node.parent, 0);
-                    }
-                }
-                else if (node.kind === 12 && node.parent.parent.kind === 176) {
-                    var templateExpression = node.parent;
-                    var tagExpression = templateExpression.parent;
-                    ts.Debug.assert(templateExpression.kind === 189);
-                    var argumentIndex = ts.isInsideTemplateLiteral(node, position) ? 0 : 1;
-                    return getArgumentListInfoForTemplate(tagExpression, argumentIndex);
-                }
-                else if (node.parent.kind === 197 && node.parent.parent.parent.kind === 176) {
-                    var templateSpan = node.parent;
-                    var templateExpression = templateSpan.parent;
-                    var tagExpression = templateExpression.parent;
-                    ts.Debug.assert(templateExpression.kind === 189);
-                    if (node.kind === 14 && !ts.isInsideTemplateLiteral(node, position)) {
-                        return undefined;
-                    }
-                    var spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
-                    var argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node);
-                    return getArgumentListInfoForTemplate(tagExpression, argumentIndex);
-                }
-                return undefined;
-            }
-            function getArgumentIndex(argumentsList, node) {
-                var argumentIndex = 0;
-                var listChildren = argumentsList.getChildren();
-                for (var _i = 0, listChildren_1 = listChildren; _i < listChildren_1.length; _i++) {
-                    var child = listChildren_1[_i];
-                    if (child === node) {
-                        break;
-                    }
-                    if (child.kind !== 24) {
-                        argumentIndex++;
-                    }
-                }
-                return argumentIndex;
-            }
-            function getArgumentCount(argumentsList) {
-                var listChildren = argumentsList.getChildren();
-                var argumentCount = ts.countWhere(listChildren, function (arg) { return arg.kind !== 24; });
-                if (listChildren.length > 0 && ts.lastOrUndefined(listChildren).kind === 24) {
-                    argumentCount++;
-                }
-                return argumentCount;
-            }
-            function getArgumentIndexForTemplatePiece(spanIndex, node) {
-                ts.Debug.assert(position >= node.getStart(), "Assumed 'position' could not occur before node.");
-                if (ts.isTemplateLiteralKind(node.kind)) {
-                    if (ts.isInsideTemplateLiteral(node, position)) {
-                        return 0;
-                    }
-                    return spanIndex + 2;
-                }
-                return spanIndex + 1;
-            }
-            function getArgumentListInfoForTemplate(tagExpression, argumentIndex) {
-                var argumentCount = tagExpression.template.kind === 11
-                    ? 1
-                    : tagExpression.template.templateSpans.length + 1;
-                ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
-                return {
-                    kind: 2,
-                    invocation: tagExpression,
-                    argumentsSpan: getApplicableSpanForTaggedTemplate(tagExpression),
-                    argumentIndex: argumentIndex,
-                    argumentCount: argumentCount
-                };
-            }
-            function getApplicableSpanForArguments(argumentsList) {
-                var applicableSpanStart = argumentsList.getFullStart();
-                var applicableSpanEnd = ts.skipTrivia(sourceFile.text, argumentsList.getEnd(), false);
-                return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
-            }
-            function getApplicableSpanForTaggedTemplate(taggedTemplate) {
-                var template = taggedTemplate.template;
-                var applicableSpanStart = template.getStart();
-                var applicableSpanEnd = template.getEnd();
-                if (template.kind === 189) {
-                    var lastSpan = ts.lastOrUndefined(template.templateSpans);
-                    if (lastSpan.literal.getFullWidth() === 0) {
-                        applicableSpanEnd = ts.skipTrivia(sourceFile.text, applicableSpanEnd, false);
-                    }
-                }
-                return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
-            }
-            function getContainingArgumentInfo(node) {
-                for (var n = node; n.kind !== 256; n = n.parent) {
-                    if (ts.isFunctionBlock(n)) {
-                        return undefined;
-                    }
-                    if (n.pos < n.parent.pos || n.end > n.parent.end) {
-                        ts.Debug.fail("Node of kind " + n.kind + " is not a subspan of its parent of kind " + n.parent.kind);
-                    }
-                    var argumentInfo_1 = getImmediatelyContainingArgumentInfo(n);
-                    if (argumentInfo_1) {
-                        return argumentInfo_1;
-                    }
-                }
-                return undefined;
-            }
-            function getChildListThatStartsWithOpenerToken(parent, openerToken, sourceFile) {
-                var children = parent.getChildren(sourceFile);
-                var indexOfOpenerToken = children.indexOf(openerToken);
-                ts.Debug.assert(indexOfOpenerToken >= 0 && children.length > indexOfOpenerToken + 1);
-                return children[indexOfOpenerToken + 1];
-            }
-            function selectBestInvalidOverloadIndex(candidates, argumentCount) {
-                var maxParamsSignatureIndex = -1;
-                var maxParams = -1;
-                for (var i = 0; i < candidates.length; i++) {
-                    var candidate = candidates[i];
-                    if (candidate.hasRestParameter || candidate.parameters.length >= argumentCount) {
-                        return i;
-                    }
-                    if (candidate.parameters.length > maxParams) {
-                        maxParams = candidate.parameters.length;
-                        maxParamsSignatureIndex = i;
-                    }
-                }
-                return maxParamsSignatureIndex;
-            }
-            function createSignatureHelpItems(candidates, bestSignature, argumentListInfo) {
-                var applicableSpan = argumentListInfo.argumentsSpan;
-                var isTypeParameterList = argumentListInfo.kind === 0;
-                var invocation = argumentListInfo.invocation;
-                var callTarget = ts.getInvokedExpression(invocation);
-                var callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
-                var callTargetDisplayParts = callTargetSymbol && ts.symbolToDisplayParts(typeChecker, callTargetSymbol, undefined, undefined);
-                var items = ts.map(candidates, function (candidateSignature) {
-                    var signatureHelpParameters;
-                    var prefixDisplayParts = [];
-                    var suffixDisplayParts = [];
-                    if (callTargetDisplayParts) {
-                        ts.addRange(prefixDisplayParts, callTargetDisplayParts);
-                    }
-                    if (isTypeParameterList) {
-                        prefixDisplayParts.push(ts.punctuationPart(25));
-                        var typeParameters = candidateSignature.typeParameters;
-                        signatureHelpParameters = typeParameters && typeParameters.length > 0 ? ts.map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
-                        suffixDisplayParts.push(ts.punctuationPart(27));
-                        var parameterParts = ts.mapToDisplayParts(function (writer) {
-                            return typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisType, candidateSignature.parameters, writer, invocation);
-                        });
-                        ts.addRange(suffixDisplayParts, parameterParts);
-                    }
-                    else {
-                        var typeParameterParts = ts.mapToDisplayParts(function (writer) {
-                            return typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation);
-                        });
-                        ts.addRange(prefixDisplayParts, typeParameterParts);
-                        prefixDisplayParts.push(ts.punctuationPart(17));
-                        var parameters = candidateSignature.parameters;
-                        signatureHelpParameters = parameters.length > 0 ? ts.map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
-                        suffixDisplayParts.push(ts.punctuationPart(18));
-                    }
-                    var returnTypeParts = ts.mapToDisplayParts(function (writer) {
-                        return typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation);
-                    });
-                    ts.addRange(suffixDisplayParts, returnTypeParts);
-                    return {
-                        isVariadic: candidateSignature.hasRestParameter,
-                        prefixDisplayParts: prefixDisplayParts,
-                        suffixDisplayParts: suffixDisplayParts,
-                        separatorDisplayParts: [ts.punctuationPart(24), ts.spacePart()],
-                        parameters: signatureHelpParameters,
-                        documentation: candidateSignature.getDocumentationComment()
-                    };
-                });
-                var argumentIndex = argumentListInfo.argumentIndex;
-                var argumentCount = argumentListInfo.argumentCount;
-                var selectedItemIndex = candidates.indexOf(bestSignature);
-                if (selectedItemIndex < 0) {
-                    selectedItemIndex = selectBestInvalidOverloadIndex(candidates, argumentCount);
-                }
-                ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
-                return {
-                    items: items,
-                    applicableSpan: applicableSpan,
-                    selectedItemIndex: selectedItemIndex,
-                    argumentIndex: argumentIndex,
-                    argumentCount: argumentCount
-                };
-                function createSignatureHelpParameterForParameter(parameter) {
-                    var displayParts = ts.mapToDisplayParts(function (writer) {
-                        return typeChecker.getSymbolDisplayBuilder().buildParameterDisplay(parameter, writer, invocation);
-                    });
-                    return {
-                        name: parameter.name,
-                        documentation: parameter.getDocumentationComment(),
-                        displayParts: displayParts,
-                        isOptional: typeChecker.isOptionalParameter(parameter.valueDeclaration)
-                    };
-                }
-                function createSignatureHelpParameterForTypeParameter(typeParameter) {
-                    var displayParts = ts.mapToDisplayParts(function (writer) {
-                        return typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(typeParameter, writer, invocation);
-                    });
-                    return {
-                        name: typeParameter.symbol.name,
-                        documentation: emptyArray,
-                        displayParts: displayParts,
-                        isOptional: false
-                    };
-                }
-            }
-        }
-        SignatureHelp.getSignatureHelpItems = getSignatureHelpItems;
-    })(SignatureHelp = ts.SignatureHelp || (ts.SignatureHelp = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getLineStartPositionForPosition(position, sourceFile) {
-        var lineStarts = sourceFile.getLineStarts();
-        var line = sourceFile.getLineAndCharacterOfPosition(position).line;
-        return lineStarts[line];
-    }
-    ts.getLineStartPositionForPosition = getLineStartPositionForPosition;
-    function rangeContainsRange(r1, r2) {
-        return startEndContainsRange(r1.pos, r1.end, r2);
-    }
-    ts.rangeContainsRange = rangeContainsRange;
-    function startEndContainsRange(start, end, range) {
-        return start <= range.pos && end >= range.end;
-    }
-    ts.startEndContainsRange = startEndContainsRange;
-    function rangeContainsStartEnd(range, start, end) {
-        return range.pos <= start && range.end >= end;
-    }
-    ts.rangeContainsStartEnd = rangeContainsStartEnd;
-    function rangeOverlapsWithStartEnd(r1, start, end) {
-        return startEndOverlapsWithStartEnd(r1.pos, r1.end, start, end);
-    }
-    ts.rangeOverlapsWithStartEnd = rangeOverlapsWithStartEnd;
-    function startEndOverlapsWithStartEnd(start1, end1, start2, end2) {
-        var start = Math.max(start1, start2);
-        var end = Math.min(end1, end2);
-        return start < end;
-    }
-    ts.startEndOverlapsWithStartEnd = startEndOverlapsWithStartEnd;
-    function positionBelongsToNode(candidate, position, sourceFile) {
-        return candidate.end > position || !isCompletedNode(candidate, sourceFile);
-    }
-    ts.positionBelongsToNode = positionBelongsToNode;
-    function isCompletedNode(n, sourceFile) {
-        if (ts.nodeIsMissing(n)) {
-            return false;
-        }
-        switch (n.kind) {
-            case 221:
-            case 222:
-            case 224:
-            case 171:
-            case 167:
-            case 159:
-            case 199:
-            case 226:
-            case 227:
-                return nodeEndsWith(n, 16, sourceFile);
-            case 252:
-                return isCompletedNode(n.block, sourceFile);
-            case 175:
-                if (!n.arguments) {
-                    return true;
-                }
-            case 174:
-            case 178:
-            case 164:
-                return nodeEndsWith(n, 18, sourceFile);
-            case 156:
-            case 157:
-                return isCompletedNode(n.type, sourceFile);
-            case 148:
-            case 149:
-            case 150:
-            case 220:
-            case 179:
-            case 147:
-            case 146:
-            case 152:
-            case 151:
-            case 180:
-                if (n.body) {
-                    return isCompletedNode(n.body, sourceFile);
-                }
-                if (n.type) {
-                    return isCompletedNode(n.type, sourceFile);
-                }
-                return hasChildOfKind(n, 18, sourceFile);
-            case 225:
-                return n.body && isCompletedNode(n.body, sourceFile);
-            case 203:
-                if (n.elseStatement) {
-                    return isCompletedNode(n.elseStatement, sourceFile);
-                }
-                return isCompletedNode(n.thenStatement, sourceFile);
-            case 202:
-                return isCompletedNode(n.expression, sourceFile) ||
-                    hasChildOfKind(n, 23);
-            case 170:
-            case 168:
-            case 173:
-            case 140:
-            case 161:
-                return nodeEndsWith(n, 20, sourceFile);
-            case 153:
-                if (n.type) {
-                    return isCompletedNode(n.type, sourceFile);
-                }
-                return hasChildOfKind(n, 20, sourceFile);
-            case 249:
-            case 250:
-                return false;
-            case 206:
-            case 207:
-            case 208:
-            case 205:
-                return isCompletedNode(n.statement, sourceFile);
-            case 204:
-                var hasWhileKeyword = findChildOfKind(n, 104, sourceFile);
-                if (hasWhileKeyword) {
-                    return nodeEndsWith(n, 18, sourceFile);
-                }
-                return isCompletedNode(n.statement, sourceFile);
-            case 158:
-                return isCompletedNode(n.exprName, sourceFile);
-            case 182:
-            case 181:
-            case 183:
-            case 190:
-            case 191:
-                var unaryWordExpression = n;
-                return isCompletedNode(unaryWordExpression.expression, sourceFile);
-            case 176:
-                return isCompletedNode(n.template, sourceFile);
-            case 189:
-                var lastSpan = ts.lastOrUndefined(n.templateSpans);
-                return isCompletedNode(lastSpan, sourceFile);
-            case 197:
-                return ts.nodeIsPresent(n.literal);
-            case 185:
-                return isCompletedNode(n.operand, sourceFile);
-            case 187:
-                return isCompletedNode(n.right, sourceFile);
-            case 188:
-                return isCompletedNode(n.whenFalse, sourceFile);
-            default:
-                return true;
-        }
-    }
-    ts.isCompletedNode = isCompletedNode;
-    function nodeEndsWith(n, expectedLastToken, sourceFile) {
-        var children = n.getChildren(sourceFile);
-        if (children.length) {
-            var last = ts.lastOrUndefined(children);
-            if (last.kind === expectedLastToken) {
-                return true;
-            }
-            else if (last.kind === 23 && children.length !== 1) {
-                return children[children.length - 2].kind === expectedLastToken;
-            }
-        }
-        return false;
-    }
-    function findListItemInfo(node) {
-        var list = findContainingList(node);
-        if (!list) {
-            return undefined;
-        }
-        var children = list.getChildren();
-        var listItemIndex = ts.indexOf(children, node);
-        return {
-            listItemIndex: listItemIndex,
-            list: list
-        };
-    }
-    ts.findListItemInfo = findListItemInfo;
-    function hasChildOfKind(n, kind, sourceFile) {
-        return !!findChildOfKind(n, kind, sourceFile);
-    }
-    ts.hasChildOfKind = hasChildOfKind;
-    function findChildOfKind(n, kind, sourceFile) {
-        return ts.forEach(n.getChildren(sourceFile), function (c) { return c.kind === kind && c; });
-    }
-    ts.findChildOfKind = findChildOfKind;
-    function findContainingList(node) {
-        var syntaxList = ts.forEach(node.parent.getChildren(), function (c) {
-            if (c.kind === 279 && c.pos <= node.pos && c.end >= node.end) {
-                return c;
-            }
-        });
-        ts.Debug.assert(!syntaxList || ts.contains(syntaxList.getChildren(), node));
-        return syntaxList;
-    }
-    ts.findContainingList = findContainingList;
-    function getTouchingWord(sourceFile, position) {
-        return getTouchingToken(sourceFile, position, function (n) { return isWord(n.kind); });
-    }
-    ts.getTouchingWord = getTouchingWord;
-    function getTouchingPropertyName(sourceFile, position) {
-        return getTouchingToken(sourceFile, position, function (n) { return isPropertyName(n.kind); });
-    }
-    ts.getTouchingPropertyName = getTouchingPropertyName;
-    function getTouchingToken(sourceFile, position, includeItemAtEndPosition) {
-        return getTokenAtPositionWorker(sourceFile, position, false, includeItemAtEndPosition);
-    }
-    ts.getTouchingToken = getTouchingToken;
-    function getTokenAtPosition(sourceFile, position) {
-        return getTokenAtPositionWorker(sourceFile, position, true, undefined);
-    }
-    ts.getTokenAtPosition = getTokenAtPosition;
-    function getTokenAtPositionWorker(sourceFile, position, allowPositionInLeadingTrivia, includeItemAtEndPosition) {
-        var current = sourceFile;
-        outer: while (true) {
-            if (isToken(current)) {
-                return current;
-            }
-            for (var i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
-                var child = current.getChildAt(i);
-                var start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile);
-                if (start <= position) {
-                    var end = child.getEnd();
-                    if (position < end || (position === end && child.kind === 1)) {
-                        current = child;
-                        continue outer;
-                    }
-                    else if (includeItemAtEndPosition && end === position) {
-                        var previousToken = findPrecedingToken(position, sourceFile, child);
-                        if (previousToken && includeItemAtEndPosition(previousToken)) {
-                            return previousToken;
-                        }
-                    }
-                }
-            }
-            return current;
-        }
-    }
-    function findTokenOnLeftOfPosition(file, position) {
-        var tokenAtPosition = getTokenAtPosition(file, position);
-        if (isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
-            return tokenAtPosition;
-        }
-        return findPrecedingToken(position, file);
-    }
-    ts.findTokenOnLeftOfPosition = findTokenOnLeftOfPosition;
-    function findNextToken(previousToken, parent) {
-        return find(parent);
-        function find(n) {
-            if (isToken(n) && n.pos === previousToken.end) {
-                return n;
-            }
-            var children = n.getChildren();
-            for (var _i = 0, children_1 = children; _i < children_1.length; _i++) {
-                var child = children_1[_i];
-                var shouldDiveInChildNode = (child.pos <= previousToken.pos && child.end > previousToken.end) ||
-                    (child.pos === previousToken.end);
-                if (shouldDiveInChildNode && nodeHasTokens(child)) {
-                    return find(child);
-                }
-            }
-            return undefined;
-        }
-    }
-    ts.findNextToken = findNextToken;
-    function findPrecedingToken(position, sourceFile, startNode) {
-        return find(startNode || sourceFile);
-        function findRightmostToken(n) {
-            if (isToken(n) || n.kind === 244) {
-                return n;
-            }
-            var children = n.getChildren();
-            var candidate = findRightmostChildNodeWithTokens(children, children.length);
-            return candidate && findRightmostToken(candidate);
-        }
-        function find(n) {
-            if (isToken(n) || n.kind === 244) {
-                return n;
-            }
-            var children = n.getChildren();
-            for (var i = 0, len = children.length; i < len; i++) {
-                var child = children[i];
-                if (position < child.end && (nodeHasTokens(child) || child.kind === 244)) {
-                    var start = child.getStart(sourceFile);
-                    var lookInPreviousChild = (start >= position) ||
-                        (child.kind === 244 && start === child.end);
-                    if (lookInPreviousChild) {
-                        var candidate = findRightmostChildNodeWithTokens(children, i);
-                        return candidate && findRightmostToken(candidate);
-                    }
-                    else {
-                        return find(child);
-                    }
-                }
-            }
-            ts.Debug.assert(startNode !== undefined || n.kind === 256);
-            if (children.length) {
-                var candidate = findRightmostChildNodeWithTokens(children, children.length);
-                return candidate && findRightmostToken(candidate);
-            }
-        }
-        function findRightmostChildNodeWithTokens(children, exclusiveStartPosition) {
-            for (var i = exclusiveStartPosition - 1; i >= 0; i--) {
-                if (nodeHasTokens(children[i])) {
-                    return children[i];
-                }
-            }
-        }
-    }
-    ts.findPrecedingToken = findPrecedingToken;
-    function isInString(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        return token && (token.kind === 9 || token.kind === 166) && position > token.getStart(sourceFile);
-    }
-    ts.isInString = isInString;
-    function isInComment(sourceFile, position) {
-        return isInCommentHelper(sourceFile, position, undefined);
-    }
-    ts.isInComment = isInComment;
-    function isInsideJsxElementOrAttribute(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        if (!token) {
-            return false;
-        }
-        if (token.kind === 25 && token.parent.kind === 244) {
-            return true;
-        }
-        if (token.kind === 25 && token.parent.kind === 248) {
-            return true;
-        }
-        if (token && token.kind === 16 && token.parent.kind === 248) {
-            return true;
-        }
-        if (token.kind === 25 && token.parent.kind === 245) {
-            return true;
-        }
-        return false;
-    }
-    ts.isInsideJsxElementOrAttribute = isInsideJsxElementOrAttribute;
-    function isInTemplateString(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        return ts.isTemplateLiteralKind(token.kind) && position > token.getStart(sourceFile);
-    }
-    ts.isInTemplateString = isInTemplateString;
-    function isInCommentHelper(sourceFile, position, predicate) {
-        var token = getTokenAtPosition(sourceFile, position);
-        if (token && position <= token.getStart(sourceFile)) {
-            var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
-            return predicate ?
-                ts.forEach(commentRanges, function (c) { return c.pos < position &&
-                    (c.kind == 2 ? position <= c.end : position < c.end) &&
-                    predicate(c); }) :
-                ts.forEach(commentRanges, function (c) { return c.pos < position &&
-                    (c.kind == 2 ? position <= c.end : position < c.end); });
-        }
-        return false;
-    }
-    ts.isInCommentHelper = isInCommentHelper;
-    function hasDocComment(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
-        return ts.forEach(commentRanges, jsDocPrefix);
-        function jsDocPrefix(c) {
-            var text = sourceFile.text;
-            return text.length >= c.pos + 3 && text[c.pos] === "/" && text[c.pos + 1] === "*" && text[c.pos + 2] === "*";
-        }
-    }
-    ts.hasDocComment = hasDocComment;
-    function getJsDocTagAtPosition(sourceFile, position) {
-        var node = ts.getTokenAtPosition(sourceFile, position);
-        if (isToken(node)) {
-            switch (node.kind) {
-                case 102:
-                case 108:
-                case 74:
-                    node = node.parent === undefined ? undefined : node.parent.parent;
-                    break;
-                default:
-                    node = node.parent;
-                    break;
-            }
-        }
-        if (node) {
-            var jsDocComment = node.jsDocComment;
-            if (jsDocComment) {
-                for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-                    var tag = _a[_i];
-                    if (tag.pos <= position && position <= tag.end) {
-                        return tag;
-                    }
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getJsDocTagAtPosition = getJsDocTagAtPosition;
-    function nodeHasTokens(n) {
-        return n.getWidth() !== 0;
-    }
-    function getNodeModifiers(node) {
-        var flags = ts.getCombinedNodeFlags(node);
-        var result = [];
-        if (flags & 8)
-            result.push(ts.ScriptElementKindModifier.privateMemberModifier);
-        if (flags & 16)
-            result.push(ts.ScriptElementKindModifier.protectedMemberModifier);
-        if (flags & 4)
-            result.push(ts.ScriptElementKindModifier.publicMemberModifier);
-        if (flags & 32)
-            result.push(ts.ScriptElementKindModifier.staticModifier);
-        if (flags & 128)
-            result.push(ts.ScriptElementKindModifier.abstractModifier);
-        if (flags & 1)
-            result.push(ts.ScriptElementKindModifier.exportedModifier);
-        if (ts.isInAmbientContext(node))
-            result.push(ts.ScriptElementKindModifier.ambientModifier);
-        return result.length > 0 ? result.join(",") : ts.ScriptElementKindModifier.none;
-    }
-    ts.getNodeModifiers = getNodeModifiers;
-    function getTypeArgumentOrTypeParameterList(node) {
-        if (node.kind === 155 || node.kind === 174) {
-            return node.typeArguments;
-        }
-        if (ts.isFunctionLike(node) || node.kind === 221 || node.kind === 222) {
-            return node.typeParameters;
-        }
-        return undefined;
-    }
-    ts.getTypeArgumentOrTypeParameterList = getTypeArgumentOrTypeParameterList;
-    function isToken(n) {
-        return n.kind >= 0 && n.kind <= 138;
-    }
-    ts.isToken = isToken;
-    function isWord(kind) {
-        return kind === 69 || ts.isKeyword(kind);
-    }
-    ts.isWord = isWord;
-    function isPropertyName(kind) {
-        return kind === 9 || kind === 8 || isWord(kind);
-    }
-    function isComment(kind) {
-        return kind === 2 || kind === 3;
-    }
-    ts.isComment = isComment;
-    function isStringOrRegularExpressionOrTemplateLiteral(kind) {
-        if (kind === 9
-            || kind === 166
-            || kind === 10
-            || ts.isTemplateLiteralKind(kind)) {
-            return true;
-        }
-        return false;
-    }
-    ts.isStringOrRegularExpressionOrTemplateLiteral = isStringOrRegularExpressionOrTemplateLiteral;
-    function isPunctuation(kind) {
-        return 15 <= kind && kind <= 68;
-    }
-    ts.isPunctuation = isPunctuation;
-    function isInsideTemplateLiteral(node, position) {
-        return ts.isTemplateLiteralKind(node.kind)
-            && (node.getStart() < position && position < node.getEnd()) || (!!node.isUnterminated && position === node.getEnd());
-    }
-    ts.isInsideTemplateLiteral = isInsideTemplateLiteral;
-    function isAccessibilityModifier(kind) {
-        switch (kind) {
-            case 112:
-            case 110:
-            case 111:
-                return true;
-        }
-        return false;
-    }
-    ts.isAccessibilityModifier = isAccessibilityModifier;
-    function compareDataObjects(dst, src) {
-        for (var e in dst) {
-            if (typeof dst[e] === "object") {
-                if (!compareDataObjects(dst[e], src[e])) {
-                    return false;
-                }
-            }
-            else if (typeof dst[e] !== "function") {
-                if (dst[e] !== src[e]) {
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-    ts.compareDataObjects = compareDataObjects;
-    function isArrayLiteralOrObjectLiteralDestructuringPattern(node) {
-        if (node.kind === 170 ||
-            node.kind === 171) {
-            if (node.parent.kind === 187 &&
-                node.parent.left === node &&
-                node.parent.operatorToken.kind === 56) {
-                return true;
-            }
-            if (node.parent.kind === 208 &&
-                node.parent.initializer === node) {
-                return true;
-            }
-            if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.kind === 253 ? node.parent.parent : node.parent)) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.isArrayLiteralOrObjectLiteralDestructuringPattern = isArrayLiteralOrObjectLiteralDestructuringPattern;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function isFirstDeclarationOfSymbolParameter(symbol) {
-        return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === 142;
-    }
-    ts.isFirstDeclarationOfSymbolParameter = isFirstDeclarationOfSymbolParameter;
-    var displayPartWriter = getDisplayPartWriter();
-    function getDisplayPartWriter() {
-        var displayParts;
-        var lineStart;
-        var indent;
-        resetWriter();
-        return {
-            displayParts: function () { return displayParts; },
-            writeKeyword: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.keyword); },
-            writeOperator: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.operator); },
-            writePunctuation: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.punctuation); },
-            writeSpace: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.space); },
-            writeStringLiteral: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.stringLiteral); },
-            writeParameter: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.parameterName); },
-            writeSymbol: writeSymbol,
-            writeLine: writeLine,
-            increaseIndent: function () { indent++; },
-            decreaseIndent: function () { indent--; },
-            clear: resetWriter,
-            trackSymbol: function () { },
-            reportInaccessibleThisError: function () { }
-        };
-        function writeIndent() {
-            if (lineStart) {
-                var indentString = ts.getIndentString(indent);
-                if (indentString) {
-                    displayParts.push(displayPart(indentString, ts.SymbolDisplayPartKind.space));
-                }
-                lineStart = false;
-            }
-        }
-        function writeKind(text, kind) {
-            writeIndent();
-            displayParts.push(displayPart(text, kind));
-        }
-        function writeSymbol(text, symbol) {
-            writeIndent();
-            displayParts.push(symbolPart(text, symbol));
-        }
-        function writeLine() {
-            displayParts.push(lineBreakPart());
-            lineStart = true;
-        }
-        function resetWriter() {
-            displayParts = [];
-            lineStart = true;
-            indent = 0;
-        }
-    }
-    function symbolPart(text, symbol) {
-        return displayPart(text, displayPartKind(symbol), symbol);
-        function displayPartKind(symbol) {
-            var flags = symbol.flags;
-            if (flags & 3) {
-                return isFirstDeclarationOfSymbolParameter(symbol) ? ts.SymbolDisplayPartKind.parameterName : ts.SymbolDisplayPartKind.localName;
-            }
-            else if (flags & 4) {
-                return ts.SymbolDisplayPartKind.propertyName;
-            }
-            else if (flags & 32768) {
-                return ts.SymbolDisplayPartKind.propertyName;
-            }
-            else if (flags & 65536) {
-                return ts.SymbolDisplayPartKind.propertyName;
-            }
-            else if (flags & 8) {
-                return ts.SymbolDisplayPartKind.enumMemberName;
-            }
-            else if (flags & 16) {
-                return ts.SymbolDisplayPartKind.functionName;
-            }
-            else if (flags & 32) {
-                return ts.SymbolDisplayPartKind.className;
-            }
-            else if (flags & 64) {
-                return ts.SymbolDisplayPartKind.interfaceName;
-            }
-            else if (flags & 384) {
-                return ts.SymbolDisplayPartKind.enumName;
-            }
-            else if (flags & 1536) {
-                return ts.SymbolDisplayPartKind.moduleName;
-            }
-            else if (flags & 8192) {
-                return ts.SymbolDisplayPartKind.methodName;
-            }
-            else if (flags & 262144) {
-                return ts.SymbolDisplayPartKind.typeParameterName;
-            }
-            else if (flags & 524288) {
-                return ts.SymbolDisplayPartKind.aliasName;
-            }
-            else if (flags & 8388608) {
-                return ts.SymbolDisplayPartKind.aliasName;
-            }
-            return ts.SymbolDisplayPartKind.text;
-        }
-    }
-    ts.symbolPart = symbolPart;
-    function displayPart(text, kind, symbol) {
-        return {
-            text: text,
-            kind: ts.SymbolDisplayPartKind[kind]
-        };
-    }
-    ts.displayPart = displayPart;
-    function spacePart() {
-        return displayPart(" ", ts.SymbolDisplayPartKind.space);
-    }
-    ts.spacePart = spacePart;
-    function keywordPart(kind) {
-        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.keyword);
-    }
-    ts.keywordPart = keywordPart;
-    function punctuationPart(kind) {
-        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.punctuation);
-    }
-    ts.punctuationPart = punctuationPart;
-    function operatorPart(kind) {
-        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.operator);
-    }
-    ts.operatorPart = operatorPart;
-    function textOrKeywordPart(text) {
-        var kind = ts.stringToToken(text);
-        return kind === undefined
-            ? textPart(text)
-            : keywordPart(kind);
-    }
-    ts.textOrKeywordPart = textOrKeywordPart;
-    function textPart(text) {
-        return displayPart(text, ts.SymbolDisplayPartKind.text);
-    }
-    ts.textPart = textPart;
-    var carriageReturnLineFeed = "\r\n";
-    function getNewLineOrDefaultFromHost(host) {
-        return host.getNewLine ? host.getNewLine() : carriageReturnLineFeed;
-    }
-    ts.getNewLineOrDefaultFromHost = getNewLineOrDefaultFromHost;
-    function lineBreakPart() {
-        return displayPart("\n", ts.SymbolDisplayPartKind.lineBreak);
-    }
-    ts.lineBreakPart = lineBreakPart;
-    function mapToDisplayParts(writeDisplayParts) {
-        writeDisplayParts(displayPartWriter);
-        var result = displayPartWriter.displayParts();
-        displayPartWriter.clear();
-        return result;
-    }
-    ts.mapToDisplayParts = mapToDisplayParts;
-    function typeToDisplayParts(typechecker, type, enclosingDeclaration, flags) {
-        return mapToDisplayParts(function (writer) {
-            typechecker.getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        });
-    }
-    ts.typeToDisplayParts = typeToDisplayParts;
-    function symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration, meaning, flags) {
-        return mapToDisplayParts(function (writer) {
-            typeChecker.getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags);
-        });
-    }
-    ts.symbolToDisplayParts = symbolToDisplayParts;
-    function signatureToDisplayParts(typechecker, signature, enclosingDeclaration, flags) {
-        return mapToDisplayParts(function (writer) {
-            typechecker.getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags);
-        });
-    }
-    ts.signatureToDisplayParts = signatureToDisplayParts;
-    function getDeclaredName(typeChecker, symbol, location) {
-        if (isImportOrExportSpecifierName(location)) {
-            return location.getText();
-        }
-        else if (ts.isStringOrNumericLiteral(location.kind) &&
-            location.parent.kind === 140) {
-            return location.text;
-        }
-        var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
-        var name = typeChecker.symbolToString(localExportDefaultSymbol || symbol);
-        return name;
-    }
-    ts.getDeclaredName = getDeclaredName;
-    function isImportOrExportSpecifierName(location) {
-        return location.parent &&
-            (location.parent.kind === 234 || location.parent.kind === 238) &&
-            location.parent.propertyName === location;
-    }
-    ts.isImportOrExportSpecifierName = isImportOrExportSpecifierName;
-    function stripQuotes(name) {
-        var length = name.length;
-        if (length >= 2 &&
-            name.charCodeAt(0) === name.charCodeAt(length - 1) &&
-            (name.charCodeAt(0) === 34 || name.charCodeAt(0) === 39)) {
-            return name.substring(1, length - 1);
-        }
-        ;
-        return name;
-    }
-    ts.stripQuotes = stripQuotes;
-    function scriptKindIs(fileName, host) {
-        var scriptKinds = [];
-        for (var _i = 2; _i < arguments.length; _i++) {
-            scriptKinds[_i - 2] = arguments[_i];
-        }
-        var scriptKind = getScriptKind(fileName, host);
-        return ts.forEach(scriptKinds, function (k) { return k === scriptKind; });
-    }
-    ts.scriptKindIs = scriptKindIs;
-    function getScriptKind(fileName, host) {
-        var scriptKind;
-        if (host && host.getScriptKind) {
-            scriptKind = host.getScriptKind(fileName);
-        }
-        if (!scriptKind || scriptKind === 0) {
-            scriptKind = ts.getScriptKindFromFileName(fileName);
-        }
-        return ts.ensureScriptKind(fileName, scriptKind);
-    }
-    ts.getScriptKind = getScriptKind;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var JsTyping;
-    (function (JsTyping) {
-        ;
-        ;
-        var safeList;
-        function discoverTypings(host, fileNames, projectRootPath, safeListPath, packageNameToTypingLocation, typingOptions, compilerOptions) {
-            var inferredTypings = {};
-            if (!typingOptions || !typingOptions.enableAutoDiscovery) {
-                return { cachedTypingPaths: [], newTypingNames: [], filesToWatch: [] };
-            }
-            fileNames = ts.filter(ts.map(fileNames, ts.normalizePath), function (f) { return ts.scriptKindIs(f, undefined, 1, 2); });
-            if (!safeList) {
-                var result = ts.readConfigFile(safeListPath, function (path) { return host.readFile(path); });
-                if (result.config) {
-                    safeList = result.config;
-                }
-                else {
-                    safeList = {};
-                }
-                ;
-            }
-            var filesToWatch = [];
-            var searchDirs = [];
-            var exclude = [];
-            mergeTypings(typingOptions.include);
-            exclude = typingOptions.exclude || [];
-            var possibleSearchDirs = ts.map(fileNames, ts.getDirectoryPath);
-            if (projectRootPath !== undefined) {
-                possibleSearchDirs.push(projectRootPath);
-            }
-            searchDirs = ts.deduplicate(possibleSearchDirs);
-            for (var _i = 0, searchDirs_1 = searchDirs; _i < searchDirs_1.length; _i++) {
-                var searchDir = searchDirs_1[_i];
-                var packageJsonPath = ts.combinePaths(searchDir, "package.json");
-                getTypingNamesFromJson(packageJsonPath, filesToWatch);
-                var bowerJsonPath = ts.combinePaths(searchDir, "bower.json");
-                getTypingNamesFromJson(bowerJsonPath, filesToWatch);
-                var nodeModulesPath = ts.combinePaths(searchDir, "node_modules");
-                getTypingNamesFromNodeModuleFolder(nodeModulesPath);
-            }
-            getTypingNamesFromSourceFileNames(fileNames);
-            for (var name_37 in packageNameToTypingLocation) {
-                if (ts.hasProperty(inferredTypings, name_37) && !inferredTypings[name_37]) {
-                    inferredTypings[name_37] = packageNameToTypingLocation[name_37];
-                }
-            }
-            for (var _a = 0, exclude_1 = exclude; _a < exclude_1.length; _a++) {
-                var excludeTypingName = exclude_1[_a];
-                delete inferredTypings[excludeTypingName];
-            }
-            var newTypingNames = [];
-            var cachedTypingPaths = [];
-            for (var typing in inferredTypings) {
-                if (inferredTypings[typing] !== undefined) {
-                    cachedTypingPaths.push(inferredTypings[typing]);
-                }
-                else {
-                    newTypingNames.push(typing);
-                }
-            }
-            return { cachedTypingPaths: cachedTypingPaths, newTypingNames: newTypingNames, filesToWatch: filesToWatch };
-            function mergeTypings(typingNames) {
-                if (!typingNames) {
-                    return;
-                }
-                for (var _i = 0, typingNames_1 = typingNames; _i < typingNames_1.length; _i++) {
-                    var typing = typingNames_1[_i];
-                    if (!ts.hasProperty(inferredTypings, typing)) {
-                        inferredTypings[typing] = undefined;
-                    }
-                }
-            }
-            function getTypingNamesFromJson(jsonPath, filesToWatch) {
-                var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); });
-                if (result.config) {
-                    var jsonConfig = result.config;
-                    filesToWatch.push(jsonPath);
-                    if (jsonConfig.dependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.dependencies));
-                    }
-                    if (jsonConfig.devDependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.devDependencies));
-                    }
-                    if (jsonConfig.optionalDependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.optionalDependencies));
-                    }
-                    if (jsonConfig.peerDependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.peerDependencies));
-                    }
-                }
-            }
-            function getTypingNamesFromSourceFileNames(fileNames) {
-                var jsFileNames = ts.filter(fileNames, ts.hasJavaScriptFileExtension);
-                var inferredTypingNames = ts.map(jsFileNames, function (f) { return ts.removeFileExtension(ts.getBaseFileName(f.toLowerCase())); });
-                var cleanedTypingNames = ts.map(inferredTypingNames, function (f) { return f.replace(/((?:\.|-)min(?=\.|$))|((?:-|\.)\d+)/g, ""); });
-                if (safeList === undefined) {
-                    mergeTypings(cleanedTypingNames);
-                }
-                else {
-                    mergeTypings(ts.filter(cleanedTypingNames, function (f) { return ts.hasProperty(safeList, f); }));
-                }
-                var hasJsxFile = ts.forEach(fileNames, function (f) { return ts.scriptKindIs(f, undefined, 2); });
-                if (hasJsxFile) {
-                    mergeTypings(["react"]);
-                }
-            }
-            function getTypingNamesFromNodeModuleFolder(nodeModulesPath) {
-                if (!host.directoryExists(nodeModulesPath)) {
-                    return;
-                }
-                var typingNames = [];
-                var fileNames = host.readDirectory(nodeModulesPath, "*.json", undefined, 2);
-                for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
-                    var fileName = fileNames_1[_i];
-                    var normalizedFileName = ts.normalizePath(fileName);
-                    if (ts.getBaseFileName(normalizedFileName) !== "package.json") {
-                        continue;
-                    }
-                    var result = ts.readConfigFile(normalizedFileName, function (path) { return host.readFile(path); });
-                    if (!result.config) {
-                        continue;
-                    }
-                    var packageJson = result.config;
-                    if (packageJson._requiredBy &&
-                        ts.filter(packageJson._requiredBy, function (r) { return r[0] === "#" || r === "/"; }).length === 0) {
-                        continue;
-                    }
-                    if (!packageJson.name) {
-                        continue;
-                    }
-                    if (packageJson.typings) {
-                        var absolutePath = ts.getNormalizedAbsolutePath(packageJson.typings, ts.getDirectoryPath(normalizedFileName));
-                        inferredTypings[packageJson.name] = absolutePath;
-                    }
-                    else {
-                        typingNames.push(packageJson.name);
-                    }
-                }
-                mergeTypings(typingNames);
-            }
-        }
-        JsTyping.discoverTypings = discoverTypings;
-    })(JsTyping = ts.JsTyping || (ts.JsTyping = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var standardScanner = ts.createScanner(2, false, 0);
-        var jsxScanner = ts.createScanner(2, false, 1);
-        var scanner;
-        function getFormattingScanner(sourceFile, startPos, endPos) {
-            ts.Debug.assert(scanner === undefined);
-            scanner = sourceFile.languageVariant === 1 ? jsxScanner : standardScanner;
-            scanner.setText(sourceFile.text);
-            scanner.setTextPos(startPos);
-            var wasNewLine = true;
-            var leadingTrivia;
-            var trailingTrivia;
-            var savedPos;
-            var lastScanAction;
-            var lastTokenInfo;
-            return {
-                advance: advance,
-                readTokenInfo: readTokenInfo,
-                isOnToken: isOnToken,
-                getCurrentLeadingTrivia: function () { return leadingTrivia; },
-                lastTrailingTriviaWasNewLine: function () { return wasNewLine; },
-                close: function () {
-                    ts.Debug.assert(scanner !== undefined);
-                    lastTokenInfo = undefined;
-                    scanner.setText(undefined);
-                    scanner = undefined;
-                }
-            };
-            function advance() {
-                ts.Debug.assert(scanner !== undefined);
-                lastTokenInfo = undefined;
-                var isStarted = scanner.getStartPos() !== startPos;
-                if (isStarted) {
-                    if (trailingTrivia) {
-                        ts.Debug.assert(trailingTrivia.length !== 0);
-                        wasNewLine = ts.lastOrUndefined(trailingTrivia).kind === 4;
-                    }
-                    else {
-                        wasNewLine = false;
-                    }
-                }
-                leadingTrivia = undefined;
-                trailingTrivia = undefined;
-                if (!isStarted) {
-                    scanner.scan();
-                }
-                var pos = scanner.getStartPos();
-                while (pos < endPos) {
-                    var t = scanner.getToken();
-                    if (!ts.isTrivia(t)) {
-                        break;
-                    }
-                    scanner.scan();
-                    var item = {
-                        pos: pos,
-                        end: scanner.getStartPos(),
-                        kind: t
-                    };
-                    pos = scanner.getStartPos();
-                    if (!leadingTrivia) {
-                        leadingTrivia = [];
-                    }
-                    leadingTrivia.push(item);
-                }
-                savedPos = scanner.getStartPos();
-            }
-            function shouldRescanGreaterThanToken(node) {
-                if (node) {
-                    switch (node.kind) {
-                        case 29:
-                        case 64:
-                        case 65:
-                        case 45:
-                        case 44:
-                            return true;
-                    }
-                }
-                return false;
-            }
-            function shouldRescanJsxIdentifier(node) {
-                if (node.parent) {
-                    switch (node.parent.kind) {
-                        case 246:
-                        case 243:
-                        case 245:
-                        case 242:
-                            return node.kind === 69;
-                    }
-                }
-                return false;
-            }
-            function shouldRescanSlashToken(container) {
-                return container.kind === 10;
-            }
-            function shouldRescanTemplateToken(container) {
-                return container.kind === 13 ||
-                    container.kind === 14;
-            }
-            function startsWithSlashToken(t) {
-                return t === 39 || t === 61;
-            }
-            function readTokenInfo(n) {
-                ts.Debug.assert(scanner !== undefined);
-                if (!isOnToken()) {
-                    return {
-                        leadingTrivia: leadingTrivia,
-                        trailingTrivia: undefined,
-                        token: undefined
-                    };
-                }
-                var expectedScanAction = shouldRescanGreaterThanToken(n)
-                    ? 1
-                    : shouldRescanSlashToken(n)
-                        ? 2
-                        : shouldRescanTemplateToken(n)
-                            ? 3
-                            : shouldRescanJsxIdentifier(n)
-                                ? 4
-                                : 0;
-                if (lastTokenInfo && expectedScanAction === lastScanAction) {
-                    return fixTokenKind(lastTokenInfo, n);
-                }
-                if (scanner.getStartPos() !== savedPos) {
-                    ts.Debug.assert(lastTokenInfo !== undefined);
-                    scanner.setTextPos(savedPos);
-                    scanner.scan();
-                }
-                var currentToken = scanner.getToken();
-                if (expectedScanAction === 1 && currentToken === 27) {
-                    currentToken = scanner.reScanGreaterToken();
-                    ts.Debug.assert(n.kind === currentToken);
-                    lastScanAction = 1;
-                }
-                else if (expectedScanAction === 2 && startsWithSlashToken(currentToken)) {
-                    currentToken = scanner.reScanSlashToken();
-                    ts.Debug.assert(n.kind === currentToken);
-                    lastScanAction = 2;
-                }
-                else if (expectedScanAction === 3 && currentToken === 16) {
-                    currentToken = scanner.reScanTemplateToken();
-                    lastScanAction = 3;
-                }
-                else if (expectedScanAction === 4 && currentToken === 69) {
-                    currentToken = scanner.scanJsxIdentifier();
-                    lastScanAction = 4;
-                }
-                else {
-                    lastScanAction = 0;
-                }
-                var token = {
-                    pos: scanner.getStartPos(),
-                    end: scanner.getTextPos(),
-                    kind: currentToken
-                };
-                if (trailingTrivia) {
-                    trailingTrivia = undefined;
-                }
-                while (scanner.getStartPos() < endPos) {
-                    currentToken = scanner.scan();
-                    if (!ts.isTrivia(currentToken)) {
-                        break;
-                    }
-                    var trivia = {
-                        pos: scanner.getStartPos(),
-                        end: scanner.getTextPos(),
-                        kind: currentToken
-                    };
-                    if (!trailingTrivia) {
-                        trailingTrivia = [];
-                    }
-                    trailingTrivia.push(trivia);
-                    if (currentToken === 4) {
-                        scanner.scan();
-                        break;
-                    }
-                }
-                lastTokenInfo = {
-                    leadingTrivia: leadingTrivia,
-                    trailingTrivia: trailingTrivia,
-                    token: token
-                };
-                return fixTokenKind(lastTokenInfo, n);
-            }
-            function isOnToken() {
-                ts.Debug.assert(scanner !== undefined);
-                var current = (lastTokenInfo && lastTokenInfo.token.kind) || scanner.getToken();
-                var startPos = (lastTokenInfo && lastTokenInfo.token.pos) || scanner.getStartPos();
-                return startPos < endPos && current !== 1 && !ts.isTrivia(current);
-            }
-            function fixTokenKind(tokenInfo, container) {
-                if (ts.isToken(container) && tokenInfo.token.kind !== container.kind) {
-                    tokenInfo.token.kind = container.kind;
-                }
-                return tokenInfo;
-            }
-        }
-        formatting.getFormattingScanner = getFormattingScanner;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var FormattingContext = (function () {
-            function FormattingContext(sourceFile, formattingRequestKind) {
-                this.sourceFile = sourceFile;
-                this.formattingRequestKind = formattingRequestKind;
-            }
-            FormattingContext.prototype.updateContext = function (currentRange, currentTokenParent, nextRange, nextTokenParent, commonParent) {
-                ts.Debug.assert(currentRange !== undefined, "currentTokenSpan is null");
-                ts.Debug.assert(currentTokenParent !== undefined, "currentTokenParent is null");
-                ts.Debug.assert(nextRange !== undefined, "nextTokenSpan is null");
-                ts.Debug.assert(nextTokenParent !== undefined, "nextTokenParent is null");
-                ts.Debug.assert(commonParent !== undefined, "commonParent is null");
-                this.currentTokenSpan = currentRange;
-                this.currentTokenParent = currentTokenParent;
-                this.nextTokenSpan = nextRange;
-                this.nextTokenParent = nextTokenParent;
-                this.contextNode = commonParent;
-                this.contextNodeAllOnSameLine = undefined;
-                this.nextNodeAllOnSameLine = undefined;
-                this.tokensAreOnSameLine = undefined;
-                this.contextNodeBlockIsOnOneLine = undefined;
-                this.nextNodeBlockIsOnOneLine = undefined;
-            };
-            FormattingContext.prototype.ContextNodeAllOnSameLine = function () {
-                if (this.contextNodeAllOnSameLine === undefined) {
-                    this.contextNodeAllOnSameLine = this.NodeIsOnOneLine(this.contextNode);
-                }
-                return this.contextNodeAllOnSameLine;
-            };
-            FormattingContext.prototype.NextNodeAllOnSameLine = function () {
-                if (this.nextNodeAllOnSameLine === undefined) {
-                    this.nextNodeAllOnSameLine = this.NodeIsOnOneLine(this.nextTokenParent);
-                }
-                return this.nextNodeAllOnSameLine;
-            };
-            FormattingContext.prototype.TokensAreOnSameLine = function () {
-                if (this.tokensAreOnSameLine === undefined) {
-                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(this.currentTokenSpan.pos).line;
-                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(this.nextTokenSpan.pos).line;
-                    this.tokensAreOnSameLine = (startLine === endLine);
-                }
-                return this.tokensAreOnSameLine;
-            };
-            FormattingContext.prototype.ContextNodeBlockIsOnOneLine = function () {
-                if (this.contextNodeBlockIsOnOneLine === undefined) {
-                    this.contextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.contextNode);
-                }
-                return this.contextNodeBlockIsOnOneLine;
-            };
-            FormattingContext.prototype.NextNodeBlockIsOnOneLine = function () {
-                if (this.nextNodeBlockIsOnOneLine === undefined) {
-                    this.nextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.nextTokenParent);
-                }
-                return this.nextNodeBlockIsOnOneLine;
-            };
-            FormattingContext.prototype.NodeIsOnOneLine = function (node) {
-                var startLine = this.sourceFile.getLineAndCharacterOfPosition(node.getStart(this.sourceFile)).line;
-                var endLine = this.sourceFile.getLineAndCharacterOfPosition(node.getEnd()).line;
-                return startLine === endLine;
-            };
-            FormattingContext.prototype.BlockIsOnOneLine = function (node) {
-                var openBrace = ts.findChildOfKind(node, 15, this.sourceFile);
-                var closeBrace = ts.findChildOfKind(node, 16, this.sourceFile);
-                if (openBrace && closeBrace) {
-                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(openBrace.getEnd()).line;
-                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(closeBrace.getStart(this.sourceFile)).line;
-                    return startLine === endLine;
-                }
-                return false;
-            };
-            return FormattingContext;
-        }());
-        formatting.FormattingContext = FormattingContext;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Rule = (function () {
-            function Rule(Descriptor, Operation, Flag) {
-                if (Flag === void 0) { Flag = 0; }
-                this.Descriptor = Descriptor;
-                this.Operation = Operation;
-                this.Flag = Flag;
-            }
-            Rule.prototype.toString = function () {
-                return "[desc=" + this.Descriptor + "," +
-                    "operation=" + this.Operation + "," +
-                    "flag=" + this.Flag + "]";
-            };
-            return Rule;
-        }());
-        formatting.Rule = Rule;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RuleDescriptor = (function () {
-            function RuleDescriptor(LeftTokenRange, RightTokenRange) {
-                this.LeftTokenRange = LeftTokenRange;
-                this.RightTokenRange = RightTokenRange;
-            }
-            RuleDescriptor.prototype.toString = function () {
-                return "[leftRange=" + this.LeftTokenRange + "," +
-                    "rightRange=" + this.RightTokenRange + "]";
-            };
-            RuleDescriptor.create1 = function (left, right) {
-                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), formatting.Shared.TokenRange.FromToken(right));
-            };
-            RuleDescriptor.create2 = function (left, right) {
-                return RuleDescriptor.create4(left, formatting.Shared.TokenRange.FromToken(right));
-            };
-            RuleDescriptor.create3 = function (left, right) {
-                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), right);
-            };
-            RuleDescriptor.create4 = function (left, right) {
-                return new RuleDescriptor(left, right);
-            };
-            return RuleDescriptor;
-        }());
-        formatting.RuleDescriptor = RuleDescriptor;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RuleOperation = (function () {
-            function RuleOperation() {
-                this.Context = null;
-                this.Action = null;
-            }
-            RuleOperation.prototype.toString = function () {
-                return "[context=" + this.Context + "," +
-                    "action=" + this.Action + "]";
-            };
-            RuleOperation.create1 = function (action) {
-                return RuleOperation.create2(formatting.RuleOperationContext.Any, action);
-            };
-            RuleOperation.create2 = function (context, action) {
-                var result = new RuleOperation();
-                result.Context = context;
-                result.Action = action;
-                return result;
-            };
-            return RuleOperation;
-        }());
-        formatting.RuleOperation = RuleOperation;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RuleOperationContext = (function () {
-            function RuleOperationContext() {
-                var funcs = [];
-                for (var _i = 0; _i < arguments.length; _i++) {
-                    funcs[_i - 0] = arguments[_i];
-                }
-                this.customContextChecks = funcs;
-            }
-            RuleOperationContext.prototype.IsAny = function () {
-                return this === RuleOperationContext.Any;
-            };
-            RuleOperationContext.prototype.InContext = function (context) {
-                if (this.IsAny()) {
-                    return true;
-                }
-                for (var _i = 0, _a = this.customContextChecks; _i < _a.length; _i++) {
-                    var check = _a[_i];
-                    if (!check(context)) {
-                        return false;
-                    }
-                }
-                return true;
-            };
-            RuleOperationContext.Any = new RuleOperationContext();
-            return RuleOperationContext;
-        }());
-        formatting.RuleOperationContext = RuleOperationContext;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Rules = (function () {
-            function Rules() {
-                this.IgnoreBeforeComment = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.Comments), formatting.RuleOperation.create1(1));
-                this.IgnoreAfterLineComment = new formatting.Rule(formatting.RuleDescriptor.create3(2, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create1(1));
-                this.NoSpaceBeforeSemicolon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 23), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeColon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 54), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
-                this.NoSpaceBeforeQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 53), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
-                this.SpaceAfterColon = new formatting.Rule(formatting.RuleDescriptor.create3(54, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 2));
-                this.SpaceAfterQuestionMarkInConditionalOperator = new formatting.Rule(formatting.RuleDescriptor.create3(53, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConditionalOperatorContext), 2));
-                this.NoSpaceAfterQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create3(53, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterSemicolon = new formatting.Rule(formatting.RuleDescriptor.create3(23, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), 2));
-                this.SpaceBetweenCloseBraceAndElse = new formatting.Rule(formatting.RuleDescriptor.create1(16, 80), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceBetweenCloseBraceAndWhile = new formatting.Rule(formatting.RuleDescriptor.create1(16, 104), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16, formatting.Shared.TokenRange.FromTokens([18, 20, 24, 23])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeDot = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 21), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterDot = new formatting.Rule(formatting.RuleDescriptor.create3(21, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create3(20, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), 8));
-                this.FunctionOpenBraceLeftTokenRange = formatting.Shared.TokenRange.AnyIncludingMultilineComments;
-                this.SpaceBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2), 1);
-                this.TypeScriptOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([69, 3, 73]);
-                this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2), 1);
-                this.ControlOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([18, 3, 79, 100, 85, 80]);
-                this.SpaceBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2), 1);
-                this.SpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(15, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2));
-                this.SpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2));
-                this.NoSpaceBetweenEmptyBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), 8));
-                this.NewLineAfterOpenBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create3(15, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4));
-                this.NewLineBeforeCloseBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyIncludingMultilineComments, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4));
-                this.NoSpaceAfterUnaryPrefixOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.UnaryPrefixOperators, formatting.Shared.TokenRange.UnaryPrefixExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
-                this.NoSpaceAfterUnaryPreincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(41, formatting.Shared.TokenRange.UnaryPreincrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterUnaryPredecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(42, formatting.Shared.TokenRange.UnaryPredecrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeUnaryPostincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostincrementExpressions, 41), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeUnaryPostdecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostdecrementExpressions, 42), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterPostincrementWhenFollowedByAdd = new formatting.Rule(formatting.RuleDescriptor.create1(41, 35), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterAddWhenFollowedByUnaryPlus = new formatting.Rule(formatting.RuleDescriptor.create1(35, 35), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterAddWhenFollowedByPreincrement = new formatting.Rule(formatting.RuleDescriptor.create1(35, 41), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterPostdecrementWhenFollowedBySubtract = new formatting.Rule(formatting.RuleDescriptor.create1(42, 36), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterSubtractWhenFollowedByUnaryMinus = new formatting.Rule(formatting.RuleDescriptor.create1(36, 36), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterSubtractWhenFollowedByPredecrement = new formatting.Rule(formatting.RuleDescriptor.create1(36, 42), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.NoSpaceBeforeComma = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 24), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterCertainKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([102, 98, 92, 78, 94, 101, 119]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceAfterLetConstInVariableDeclaration = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([108, 74]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), 2));
-                this.NoSpaceBeforeOpenParenInFuncCall = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), 8));
-                this.SpaceAfterFunctionInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create3(87, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2));
-                this.NoSpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 8));
-                this.SpaceAfterVoidOperator = new formatting.Rule(formatting.RuleDescriptor.create3(103, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), 2));
-                this.NoSpaceBetweenReturnAndSemicolon = new formatting.Rule(formatting.RuleDescriptor.create1(94, 23), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceBetweenStatements = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([18, 79, 80, 71]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotForContext), 2));
-                this.SpaceAfterTryFinally = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([100, 85]), 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceAfterGetSetInMember = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([123, 131]), 69), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2));
-                this.SpaceBeforeBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryKeywordOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryKeywordOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.NoSpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(121, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterModuleImport = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([125, 129]), 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([115, 73, 122, 77, 81, 82, 83, 123, 106, 89, 107, 125, 126, 110, 112, 111, 131, 113, 134]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceBeforeCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([83, 106])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceAfterModuleName = new formatting.Rule(formatting.RuleDescriptor.create1(9, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsModuleDeclContext), 2));
-                this.SpaceBeforeArrow = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 34), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceAfterArrow = new formatting.Rule(formatting.RuleDescriptor.create3(34, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceAfterEllipsis = new formatting.Rule(formatting.RuleDescriptor.create1(22, 69), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterOptionalParameters = new formatting.Rule(formatting.RuleDescriptor.create3(53, formatting.Shared.TokenRange.FromTokens([18, 24])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
-                this.NoSpaceBeforeOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.TypeNames, 25), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
-                this.NoSpaceBetweenCloseParenAndAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create1(18, 25), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
-                this.NoSpaceAfterOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(25, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
-                this.NoSpaceBeforeCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 27), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
-                this.NoSpaceAfterCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(27, formatting.Shared.TokenRange.FromTokens([17, 19, 27, 24])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
-                this.NoSpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(27, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 8));
-                this.NoSpaceBetweenEmptyInterfaceBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectTypeContext), 8));
-                this.SpaceBeforeAt = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 55), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceAfterAt = new formatting.Rule(formatting.RuleDescriptor.create3(55, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterDecorator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([115, 69, 82, 77, 73, 113, 112, 110, 111, 123, 131, 19, 37])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsEndOfDecoratorContextOnSameLine), 2));
-                this.NoSpaceBetweenFunctionKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(87, 37), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 8));
-                this.SpaceAfterStarInGeneratorDeclaration = new formatting.Rule(formatting.RuleDescriptor.create3(37, formatting.Shared.TokenRange.FromTokens([69, 17])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 2));
-                this.NoSpaceBetweenYieldKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(114, 37), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 8));
-                this.SpaceBetweenYieldOrYieldStarAndOperand = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([114, 37]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 2));
-                this.SpaceBetweenAsyncAndOpenParen = new formatting.Rule(formatting.RuleDescriptor.create1(118, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsArrowFunctionContext, Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceBetweenAsyncAndFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(118, 87), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceBetweenTagAndTemplateString = new formatting.Rule(formatting.RuleDescriptor.create3(69, formatting.Shared.TokenRange.FromTokens([11, 12])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.HighPriorityCommonRules = [
-                    this.IgnoreBeforeComment, this.IgnoreAfterLineComment,
-                    this.NoSpaceBeforeColon, this.SpaceAfterColon, this.NoSpaceBeforeQuestionMark, this.SpaceAfterQuestionMarkInConditionalOperator,
-                    this.NoSpaceAfterQuestionMark,
-                    this.NoSpaceBeforeDot, this.NoSpaceAfterDot,
-                    this.NoSpaceAfterUnaryPrefixOperator,
-                    this.NoSpaceAfterUnaryPreincrementOperator, this.NoSpaceAfterUnaryPredecrementOperator,
-                    this.NoSpaceBeforeUnaryPostincrementOperator, this.NoSpaceBeforeUnaryPostdecrementOperator,
-                    this.SpaceAfterPostincrementWhenFollowedByAdd,
-                    this.SpaceAfterAddWhenFollowedByUnaryPlus, this.SpaceAfterAddWhenFollowedByPreincrement,
-                    this.SpaceAfterPostdecrementWhenFollowedBySubtract,
-                    this.SpaceAfterSubtractWhenFollowedByUnaryMinus, this.SpaceAfterSubtractWhenFollowedByPredecrement,
-                    this.NoSpaceAfterCloseBrace,
-                    this.SpaceAfterOpenBrace, this.SpaceBeforeCloseBrace, this.NewLineBeforeCloseBraceInBlockContext,
-                    this.SpaceAfterCloseBrace, this.SpaceBetweenCloseBraceAndElse, this.SpaceBetweenCloseBraceAndWhile, this.NoSpaceBetweenEmptyBraceBrackets,
-                    this.NoSpaceBetweenFunctionKeywordAndStar, this.SpaceAfterStarInGeneratorDeclaration,
-                    this.SpaceAfterFunctionInFuncDecl, this.NewLineAfterOpenBraceInBlockContext, this.SpaceAfterGetSetInMember,
-                    this.NoSpaceBetweenYieldKeywordAndStar, this.SpaceBetweenYieldOrYieldStarAndOperand,
-                    this.NoSpaceBetweenReturnAndSemicolon,
-                    this.SpaceAfterCertainKeywords,
-                    this.SpaceAfterLetConstInVariableDeclaration,
-                    this.NoSpaceBeforeOpenParenInFuncCall,
-                    this.SpaceBeforeBinaryKeywordOperator, this.SpaceAfterBinaryKeywordOperator,
-                    this.SpaceAfterVoidOperator,
-                    this.SpaceBetweenAsyncAndOpenParen, this.SpaceBetweenAsyncAndFunctionKeyword,
-                    this.NoSpaceBetweenTagAndTemplateString,
-                    this.NoSpaceAfterConstructor, this.NoSpaceAfterModuleImport,
-                    this.SpaceAfterCertainTypeScriptKeywords, this.SpaceBeforeCertainTypeScriptKeywords,
-                    this.SpaceAfterModuleName,
-                    this.SpaceBeforeArrow, this.SpaceAfterArrow,
-                    this.NoSpaceAfterEllipsis,
-                    this.NoSpaceAfterOptionalParameters,
-                    this.NoSpaceBetweenEmptyInterfaceBraceBrackets,
-                    this.NoSpaceBeforeOpenAngularBracket,
-                    this.NoSpaceBetweenCloseParenAndAngularBracket,
-                    this.NoSpaceAfterOpenAngularBracket,
-                    this.NoSpaceBeforeCloseAngularBracket,
-                    this.NoSpaceAfterCloseAngularBracket,
-                    this.NoSpaceAfterTypeAssertion,
-                    this.SpaceBeforeAt,
-                    this.NoSpaceAfterAt,
-                    this.SpaceAfterDecorator,
-                ];
-                this.LowPriorityCommonRules = [
-                    this.NoSpaceBeforeSemicolon,
-                    this.SpaceBeforeOpenBraceInControl, this.SpaceBeforeOpenBraceInFunction, this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock,
-                    this.NoSpaceBeforeComma,
-                    this.NoSpaceBeforeOpenBracket,
-                    this.NoSpaceAfterCloseBracket,
-                    this.SpaceAfterSemicolon,
-                    this.NoSpaceBeforeOpenParenInFuncDecl,
-                    this.SpaceBetweenStatements, this.SpaceAfterTryFinally
-                ];
-                this.SpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNextTokenNotCloseBracket), 2));
-                this.NoSpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.SpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
-                this.NoSpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8));
-                this.NoSpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8));
-                this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 2));
-                this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 8));
-                this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4), 1);
-                this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4), 1);
-                this.NewLineBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), 4), 1);
-                this.SpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 2));
-                this.NoSpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 8));
-                this.SpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceBetweenParens = new formatting.Rule(formatting.RuleDescriptor.create1(17, 18), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceBetweenBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(19, 20), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.NoSpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12, 13]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12, 13]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.NoSpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13, 14])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
-                this.SpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13, 14])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
-                this.SpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2));
-                this.NoSpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 8));
-            }
-            Rules.prototype.getRuleName = function (rule) {
-                var o = this;
-                for (var name_38 in o) {
-                    if (o[name_38] === rule) {
-                        return name_38;
-                    }
-                }
-                throw new Error("Unknown rule");
-            };
-            Rules.IsForContext = function (context) {
-                return context.contextNode.kind === 206;
-            };
-            Rules.IsNotForContext = function (context) {
-                return !Rules.IsForContext(context);
-            };
-            Rules.IsBinaryOpContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 187:
-                    case 188:
-                    case 195:
-                    case 154:
-                    case 162:
-                    case 163:
-                        return true;
-                    case 169:
-                    case 223:
-                    case 229:
-                    case 218:
-                    case 142:
-                    case 255:
-                    case 145:
-                    case 144:
-                        return context.currentTokenSpan.kind === 56 || context.nextTokenSpan.kind === 56;
-                    case 207:
-                        return context.currentTokenSpan.kind === 90 || context.nextTokenSpan.kind === 90;
-                    case 208:
-                        return context.currentTokenSpan.kind === 138 || context.nextTokenSpan.kind === 138;
-                }
-                return false;
-            };
-            Rules.IsNotBinaryOpContext = function (context) {
-                return !Rules.IsBinaryOpContext(context);
-            };
-            Rules.IsConditionalOperatorContext = function (context) {
-                return context.contextNode.kind === 188;
-            };
-            Rules.IsSameLineTokenOrBeforeMultilineBlockContext = function (context) {
-                return context.TokensAreOnSameLine() || Rules.IsBeforeMultilineBlockContext(context);
-            };
-            Rules.IsBeforeMultilineBlockContext = function (context) {
-                return Rules.IsBeforeBlockContext(context) && !(context.NextNodeAllOnSameLine() || context.NextNodeBlockIsOnOneLine());
-            };
-            Rules.IsMultilineBlockContext = function (context) {
-                return Rules.IsBlockContext(context) && !(context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
-            };
-            Rules.IsSingleLineBlockContext = function (context) {
-                return Rules.IsBlockContext(context) && (context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
-            };
-            Rules.IsBlockContext = function (context) {
-                return Rules.NodeIsBlockContext(context.contextNode);
-            };
-            Rules.IsBeforeBlockContext = function (context) {
-                return Rules.NodeIsBlockContext(context.nextTokenParent);
-            };
-            Rules.NodeIsBlockContext = function (node) {
-                if (Rules.NodeIsTypeScriptDeclWithBlockContext(node)) {
-                    return true;
-                }
-                switch (node.kind) {
-                    case 199:
-                    case 227:
-                    case 171:
-                    case 226:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsFunctionDeclContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 220:
-                    case 147:
-                    case 146:
-                    case 149:
-                    case 150:
-                    case 151:
-                    case 179:
-                    case 148:
-                    case 180:
-                    case 222:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsFunctionDeclarationOrFunctionExpressionContext = function (context) {
-                return context.contextNode.kind === 220 || context.contextNode.kind === 179;
-            };
-            Rules.IsTypeScriptDeclWithBlockContext = function (context) {
-                return Rules.NodeIsTypeScriptDeclWithBlockContext(context.contextNode);
-            };
-            Rules.NodeIsTypeScriptDeclWithBlockContext = function (node) {
-                switch (node.kind) {
-                    case 221:
-                    case 192:
-                    case 222:
-                    case 224:
-                    case 159:
-                    case 225:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsAfterCodeBlockContext = function (context) {
-                switch (context.currentTokenParent.kind) {
-                    case 221:
-                    case 225:
-                    case 224:
-                    case 199:
-                    case 252:
-                    case 226:
-                    case 213:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsControlDeclContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 203:
-                    case 213:
-                    case 206:
-                    case 207:
-                    case 208:
-                    case 205:
-                    case 216:
-                    case 204:
-                    case 212:
-                    case 252:
-                        return true;
-                    default:
-                        return false;
-                }
-            };
-            Rules.IsObjectContext = function (context) {
-                return context.contextNode.kind === 171;
-            };
-            Rules.IsFunctionCallContext = function (context) {
-                return context.contextNode.kind === 174;
-            };
-            Rules.IsNewContext = function (context) {
-                return context.contextNode.kind === 175;
-            };
-            Rules.IsFunctionCallOrNewContext = function (context) {
-                return Rules.IsFunctionCallContext(context) || Rules.IsNewContext(context);
-            };
-            Rules.IsPreviousTokenNotComma = function (context) {
-                return context.currentTokenSpan.kind !== 24;
-            };
-            Rules.IsNextTokenNotCloseBracket = function (context) {
-                return context.nextTokenSpan.kind !== 20;
-            };
-            Rules.IsArrowFunctionContext = function (context) {
-                return context.contextNode.kind === 180;
-            };
-            Rules.IsNonJsxSameLineTokenContext = function (context) {
-                return context.TokensAreOnSameLine() && context.contextNode.kind !== 244;
-            };
-            Rules.IsNotBeforeBlockInFunctionDeclarationContext = function (context) {
-                return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context);
-            };
-            Rules.IsEndOfDecoratorContextOnSameLine = function (context) {
-                return context.TokensAreOnSameLine() &&
-                    context.contextNode.decorators &&
-                    Rules.NodeIsInDecoratorContext(context.currentTokenParent) &&
-                    !Rules.NodeIsInDecoratorContext(context.nextTokenParent);
-            };
-            Rules.NodeIsInDecoratorContext = function (node) {
-                while (ts.isExpression(node)) {
-                    node = node.parent;
-                }
-                return node.kind === 143;
-            };
-            Rules.IsStartOfVariableDeclarationList = function (context) {
-                return context.currentTokenParent.kind === 219 &&
-                    context.currentTokenParent.getStart(context.sourceFile) === context.currentTokenSpan.pos;
-            };
-            Rules.IsNotFormatOnEnter = function (context) {
-                return context.formattingRequestKind !== 2;
-            };
-            Rules.IsModuleDeclContext = function (context) {
-                return context.contextNode.kind === 225;
-            };
-            Rules.IsObjectTypeContext = function (context) {
-                return context.contextNode.kind === 159;
-            };
-            Rules.IsTypeArgumentOrParameterOrAssertion = function (token, parent) {
-                if (token.kind !== 25 && token.kind !== 27) {
-                    return false;
-                }
-                switch (parent.kind) {
-                    case 155:
-                    case 177:
-                    case 221:
-                    case 192:
-                    case 222:
-                    case 220:
-                    case 179:
-                    case 180:
-                    case 147:
-                    case 146:
-                    case 151:
-                    case 152:
-                    case 174:
-                    case 175:
-                    case 194:
-                        return true;
-                    default:
-                        return false;
-                }
-            };
-            Rules.IsTypeArgumentOrParameterOrAssertionContext = function (context) {
-                return Rules.IsTypeArgumentOrParameterOrAssertion(context.currentTokenSpan, context.currentTokenParent) ||
-                    Rules.IsTypeArgumentOrParameterOrAssertion(context.nextTokenSpan, context.nextTokenParent);
-            };
-            Rules.IsTypeAssertionContext = function (context) {
-                return context.contextNode.kind === 177;
-            };
-            Rules.IsVoidOpContext = function (context) {
-                return context.currentTokenSpan.kind === 103 && context.currentTokenParent.kind === 183;
-            };
-            Rules.IsYieldOrYieldStarWithOperand = function (context) {
-                return context.contextNode.kind === 190 && context.contextNode.expression !== undefined;
-            };
-            return Rules;
-        }());
-        formatting.Rules = Rules;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RulesMap = (function () {
-            function RulesMap() {
-                this.map = [];
-                this.mapRowLength = 0;
-            }
-            RulesMap.create = function (rules) {
-                var result = new RulesMap();
-                result.Initialize(rules);
-                return result;
-            };
-            RulesMap.prototype.Initialize = function (rules) {
-                this.mapRowLength = 138 + 1;
-                this.map = new Array(this.mapRowLength * this.mapRowLength);
-                var rulesBucketConstructionStateList = new Array(this.map.length);
-                this.FillRules(rules, rulesBucketConstructionStateList);
-                return this.map;
-            };
-            RulesMap.prototype.FillRules = function (rules, rulesBucketConstructionStateList) {
-                var _this = this;
-                rules.forEach(function (rule) {
-                    _this.FillRule(rule, rulesBucketConstructionStateList);
-                });
-            };
-            RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
-                var rulesBucketIndex = (row * this.mapRowLength) + column;
-                return rulesBucketIndex;
-            };
-            RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
-                var _this = this;
-                var specificRule = rule.Descriptor.LeftTokenRange !== formatting.Shared.TokenRange.Any &&
-                    rule.Descriptor.RightTokenRange !== formatting.Shared.TokenRange.Any;
-                rule.Descriptor.LeftTokenRange.GetTokens().forEach(function (left) {
-                    rule.Descriptor.RightTokenRange.GetTokens().forEach(function (right) {
-                        var rulesBucketIndex = _this.GetRuleBucketIndex(left, right);
-                        var rulesBucket = _this.map[rulesBucketIndex];
-                        if (rulesBucket === undefined) {
-                            rulesBucket = _this.map[rulesBucketIndex] = new RulesBucket();
-                        }
-                        rulesBucket.AddRule(rule, specificRule, rulesBucketConstructionStateList, rulesBucketIndex);
-                    });
-                });
-            };
-            RulesMap.prototype.GetRule = function (context) {
-                var bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
-                var bucket = this.map[bucketIndex];
-                if (bucket != null) {
-                    for (var _i = 0, _a = bucket.Rules(); _i < _a.length; _i++) {
-                        var rule = _a[_i];
-                        if (rule.Operation.Context.InContext(context)) {
-                            return rule;
-                        }
-                    }
-                }
-                return null;
-            };
-            return RulesMap;
-        }());
-        formatting.RulesMap = RulesMap;
-        var MaskBitSize = 5;
-        var Mask = 0x1f;
-        (function (RulesPosition) {
-            RulesPosition[RulesPosition["IgnoreRulesSpecific"] = 0] = "IgnoreRulesSpecific";
-            RulesPosition[RulesPosition["IgnoreRulesAny"] = MaskBitSize * 1] = "IgnoreRulesAny";
-            RulesPosition[RulesPosition["ContextRulesSpecific"] = MaskBitSize * 2] = "ContextRulesSpecific";
-            RulesPosition[RulesPosition["ContextRulesAny"] = MaskBitSize * 3] = "ContextRulesAny";
-            RulesPosition[RulesPosition["NoContextRulesSpecific"] = MaskBitSize * 4] = "NoContextRulesSpecific";
-            RulesPosition[RulesPosition["NoContextRulesAny"] = MaskBitSize * 5] = "NoContextRulesAny";
-        })(formatting.RulesPosition || (formatting.RulesPosition = {}));
-        var RulesPosition = formatting.RulesPosition;
-        var RulesBucketConstructionState = (function () {
-            function RulesBucketConstructionState() {
-                this.rulesInsertionIndexBitmap = 0;
-            }
-            RulesBucketConstructionState.prototype.GetInsertionIndex = function (maskPosition) {
-                var index = 0;
-                var pos = 0;
-                var indexBitmap = this.rulesInsertionIndexBitmap;
-                while (pos <= maskPosition) {
-                    index += (indexBitmap & Mask);
-                    indexBitmap >>= MaskBitSize;
-                    pos += MaskBitSize;
-                }
-                return index;
-            };
-            RulesBucketConstructionState.prototype.IncreaseInsertionIndex = function (maskPosition) {
-                var value = (this.rulesInsertionIndexBitmap >> maskPosition) & Mask;
-                value++;
-                ts.Debug.assert((value & Mask) === value, "Adding more rules into the sub-bucket than allowed. Maximum allowed is 32 rules.");
-                var temp = this.rulesInsertionIndexBitmap & ~(Mask << maskPosition);
-                temp |= value << maskPosition;
-                this.rulesInsertionIndexBitmap = temp;
-            };
-            return RulesBucketConstructionState;
-        }());
-        formatting.RulesBucketConstructionState = RulesBucketConstructionState;
-        var RulesBucket = (function () {
-            function RulesBucket() {
-                this.rules = [];
-            }
-            RulesBucket.prototype.Rules = function () {
-                return this.rules;
-            };
-            RulesBucket.prototype.AddRule = function (rule, specificTokens, constructionState, rulesBucketIndex) {
-                var position;
-                if (rule.Operation.Action === 1) {
-                    position = specificTokens ?
-                        RulesPosition.IgnoreRulesSpecific :
-                        RulesPosition.IgnoreRulesAny;
-                }
-                else if (!rule.Operation.Context.IsAny()) {
-                    position = specificTokens ?
-                        RulesPosition.ContextRulesSpecific :
-                        RulesPosition.ContextRulesAny;
-                }
-                else {
-                    position = specificTokens ?
-                        RulesPosition.NoContextRulesSpecific :
-                        RulesPosition.NoContextRulesAny;
-                }
-                var state = constructionState[rulesBucketIndex];
-                if (state === undefined) {
-                    state = constructionState[rulesBucketIndex] = new RulesBucketConstructionState();
-                }
-                var index = state.GetInsertionIndex(position);
-                this.rules.splice(index, 0, rule);
-                state.IncreaseInsertionIndex(position);
-            };
-            return RulesBucket;
-        }());
-        formatting.RulesBucket = RulesBucket;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Shared;
-        (function (Shared) {
-            var TokenRangeAccess = (function () {
-                function TokenRangeAccess(from, to, except) {
-                    this.tokens = [];
-                    for (var token = from; token <= to; token++) {
-                        if (ts.indexOf(except, token) < 0) {
-                            this.tokens.push(token);
-                        }
-                    }
-                }
-                TokenRangeAccess.prototype.GetTokens = function () {
-                    return this.tokens;
-                };
-                TokenRangeAccess.prototype.Contains = function (token) {
-                    return this.tokens.indexOf(token) >= 0;
-                };
-                return TokenRangeAccess;
-            }());
-            Shared.TokenRangeAccess = TokenRangeAccess;
-            var TokenValuesAccess = (function () {
-                function TokenValuesAccess(tks) {
-                    this.tokens = tks && tks.length ? tks : [];
-                }
-                TokenValuesAccess.prototype.GetTokens = function () {
-                    return this.tokens;
-                };
-                TokenValuesAccess.prototype.Contains = function (token) {
-                    return this.tokens.indexOf(token) >= 0;
-                };
-                return TokenValuesAccess;
-            }());
-            Shared.TokenValuesAccess = TokenValuesAccess;
-            var TokenSingleValueAccess = (function () {
-                function TokenSingleValueAccess(token) {
-                    this.token = token;
-                }
-                TokenSingleValueAccess.prototype.GetTokens = function () {
-                    return [this.token];
-                };
-                TokenSingleValueAccess.prototype.Contains = function (tokenValue) {
-                    return tokenValue === this.token;
-                };
-                return TokenSingleValueAccess;
-            }());
-            Shared.TokenSingleValueAccess = TokenSingleValueAccess;
-            var TokenAllAccess = (function () {
-                function TokenAllAccess() {
-                }
-                TokenAllAccess.prototype.GetTokens = function () {
-                    var result = [];
-                    for (var token = 0; token <= 138; token++) {
-                        result.push(token);
-                    }
-                    return result;
-                };
-                TokenAllAccess.prototype.Contains = function (tokenValue) {
-                    return true;
-                };
-                TokenAllAccess.prototype.toString = function () {
-                    return "[allTokens]";
-                };
-                return TokenAllAccess;
-            }());
-            Shared.TokenAllAccess = TokenAllAccess;
-            var TokenRange = (function () {
-                function TokenRange(tokenAccess) {
-                    this.tokenAccess = tokenAccess;
-                }
-                TokenRange.FromToken = function (token) {
-                    return new TokenRange(new TokenSingleValueAccess(token));
-                };
-                TokenRange.FromTokens = function (tokens) {
-                    return new TokenRange(new TokenValuesAccess(tokens));
-                };
-                TokenRange.FromRange = function (f, to, except) {
-                    if (except === void 0) { except = []; }
-                    return new TokenRange(new TokenRangeAccess(f, to, except));
-                };
-                TokenRange.AllTokens = function () {
-                    return new TokenRange(new TokenAllAccess());
-                };
-                TokenRange.prototype.GetTokens = function () {
-                    return this.tokenAccess.GetTokens();
-                };
-                TokenRange.prototype.Contains = function (token) {
-                    return this.tokenAccess.Contains(token);
-                };
-                TokenRange.prototype.toString = function () {
-                    return this.tokenAccess.toString();
-                };
-                TokenRange.Any = TokenRange.AllTokens();
-                TokenRange.AnyIncludingMultilineComments = TokenRange.FromTokens(TokenRange.Any.GetTokens().concat([3]));
-                TokenRange.Keywords = TokenRange.FromRange(70, 138);
-                TokenRange.BinaryOperators = TokenRange.FromRange(25, 68);
-                TokenRange.BinaryKeywordOperators = TokenRange.FromTokens([90, 91, 138, 116, 124]);
-                TokenRange.UnaryPrefixOperators = TokenRange.FromTokens([41, 42, 50, 49]);
-                TokenRange.UnaryPrefixExpressions = TokenRange.FromTokens([8, 69, 17, 19, 15, 97, 92]);
-                TokenRange.UnaryPreincrementExpressions = TokenRange.FromTokens([69, 17, 97, 92]);
-                TokenRange.UnaryPostincrementExpressions = TokenRange.FromTokens([69, 18, 20, 92]);
-                TokenRange.UnaryPredecrementExpressions = TokenRange.FromTokens([69, 17, 97, 92]);
-                TokenRange.UnaryPostdecrementExpressions = TokenRange.FromTokens([69, 18, 20, 92]);
-                TokenRange.Comments = TokenRange.FromTokens([2, 3]);
-                TokenRange.TypeNames = TokenRange.FromTokens([69, 130, 132, 120, 133, 103, 117]);
-                return TokenRange;
-            }());
-            Shared.TokenRange = TokenRange;
-        })(Shared = formatting.Shared || (formatting.Shared = {}));
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RulesProvider = (function () {
-            function RulesProvider() {
-                this.globalRules = new formatting.Rules();
-            }
-            RulesProvider.prototype.getRuleName = function (rule) {
-                return this.globalRules.getRuleName(rule);
-            };
-            RulesProvider.prototype.getRuleByName = function (name) {
-                return this.globalRules[name];
-            };
-            RulesProvider.prototype.getRulesMap = function () {
-                return this.rulesMap;
-            };
-            RulesProvider.prototype.ensureUpToDate = function (options) {
-                if (this.options == null || !ts.compareDataObjects(this.options, options)) {
-                    var activeRules = this.createActiveRules(options);
-                    var rulesMap = formatting.RulesMap.create(activeRules);
-                    this.activeRules = activeRules;
-                    this.rulesMap = rulesMap;
-                    this.options = ts.clone(options);
-                }
-            };
-            RulesProvider.prototype.createActiveRules = function (options) {
-                var rules = this.globalRules.HighPriorityCommonRules.slice(0);
-                if (options.InsertSpaceAfterCommaDelimiter) {
-                    rules.push(this.globalRules.SpaceAfterComma);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterComma);
-                }
-                if (options.InsertSpaceAfterFunctionKeywordForAnonymousFunctions) {
-                    rules.push(this.globalRules.SpaceAfterAnonymousFunctionKeyword);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterAnonymousFunctionKeyword);
-                }
-                if (options.InsertSpaceAfterKeywordsInControlFlowStatements) {
-                    rules.push(this.globalRules.SpaceAfterKeywordInControl);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterKeywordInControl);
-                }
-                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis) {
-                    rules.push(this.globalRules.SpaceAfterOpenParen);
-                    rules.push(this.globalRules.SpaceBeforeCloseParen);
-                    rules.push(this.globalRules.NoSpaceBetweenParens);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenParen);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseParen);
-                    rules.push(this.globalRules.NoSpaceBetweenParens);
-                }
-                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets) {
-                    rules.push(this.globalRules.SpaceAfterOpenBracket);
-                    rules.push(this.globalRules.SpaceBeforeCloseBracket);
-                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenBracket);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseBracket);
-                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
-                }
-                if (options.InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces) {
-                    rules.push(this.globalRules.SpaceAfterTemplateHeadAndMiddle);
-                    rules.push(this.globalRules.SpaceBeforeTemplateMiddleAndTail);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterTemplateHeadAndMiddle);
-                    rules.push(this.globalRules.NoSpaceBeforeTemplateMiddleAndTail);
-                }
-                if (options.InsertSpaceAfterSemicolonInForStatements) {
-                    rules.push(this.globalRules.SpaceAfterSemicolonInFor);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterSemicolonInFor);
-                }
-                if (options.InsertSpaceBeforeAndAfterBinaryOperators) {
-                    rules.push(this.globalRules.SpaceBeforeBinaryOperator);
-                    rules.push(this.globalRules.SpaceAfterBinaryOperator);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceBeforeBinaryOperator);
-                    rules.push(this.globalRules.NoSpaceAfterBinaryOperator);
-                }
-                if (options.PlaceOpenBraceOnNewLineForControlBlocks) {
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInControl);
-                }
-                if (options.PlaceOpenBraceOnNewLineForFunctions) {
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInFunction);
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock);
-                }
-                rules = rules.concat(this.globalRules.LowPriorityCommonRules);
-                return rules;
-            };
-            return RulesProvider;
-        }());
-        formatting.RulesProvider = RulesProvider;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        function formatOnEnter(position, sourceFile, rulesProvider, options) {
-            var line = sourceFile.getLineAndCharacterOfPosition(position).line;
-            if (line === 0) {
-                return [];
-            }
-            var endOfFormatSpan = ts.getEndLinePosition(line, sourceFile);
-            while (ts.isWhiteSpace(sourceFile.text.charCodeAt(endOfFormatSpan)) && !ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
-                endOfFormatSpan--;
-            }
-            var span = {
-                pos: ts.getStartPositionOfLine(line - 1, sourceFile),
-                end: endOfFormatSpan + 1
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 2);
-        }
-        formatting.formatOnEnter = formatOnEnter;
-        function formatOnSemicolon(position, sourceFile, rulesProvider, options) {
-            return formatOutermostParent(position, 23, sourceFile, options, rulesProvider, 3);
-        }
-        formatting.formatOnSemicolon = formatOnSemicolon;
-        function formatOnClosingCurly(position, sourceFile, rulesProvider, options) {
-            return formatOutermostParent(position, 16, sourceFile, options, rulesProvider, 4);
-        }
-        formatting.formatOnClosingCurly = formatOnClosingCurly;
-        function formatDocument(sourceFile, rulesProvider, options) {
-            var span = {
-                pos: 0,
-                end: sourceFile.text.length
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 0);
-        }
-        formatting.formatDocument = formatDocument;
-        function formatSelection(start, end, sourceFile, rulesProvider, options) {
-            var span = {
-                pos: ts.getLineStartPositionForPosition(start, sourceFile),
-                end: end
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 1);
-        }
-        formatting.formatSelection = formatSelection;
-        function formatOutermostParent(position, expectedLastToken, sourceFile, options, rulesProvider, requestKind) {
-            var parent = findOutermostParent(position, expectedLastToken, sourceFile);
-            if (!parent) {
-                return [];
-            }
-            var span = {
-                pos: ts.getLineStartPositionForPosition(parent.getStart(sourceFile), sourceFile),
-                end: parent.end
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, requestKind);
-        }
-        function findOutermostParent(position, expectedTokenKind, sourceFile) {
-            var precedingToken = ts.findPrecedingToken(position, sourceFile);
-            if (!precedingToken ||
-                precedingToken.kind !== expectedTokenKind ||
-                position !== precedingToken.getEnd()) {
-                return undefined;
-            }
-            var current = precedingToken;
-            while (current &&
-                current.parent &&
-                current.parent.end === precedingToken.end &&
-                !isListElement(current.parent, current)) {
-                current = current.parent;
-            }
-            return current;
-        }
-        function isListElement(parent, node) {
-            switch (parent.kind) {
-                case 221:
-                case 222:
-                    return ts.rangeContainsRange(parent.members, node);
-                case 225:
-                    var body = parent.body;
-                    return body && body.kind === 199 && ts.rangeContainsRange(body.statements, node);
-                case 256:
-                case 199:
-                case 226:
-                    return ts.rangeContainsRange(parent.statements, node);
-                case 252:
-                    return ts.rangeContainsRange(parent.block.statements, node);
-            }
-            return false;
-        }
-        function findEnclosingNode(range, sourceFile) {
-            return find(sourceFile);
-            function find(n) {
-                var candidate = ts.forEachChild(n, function (c) { return ts.startEndContainsRange(c.getStart(sourceFile), c.end, range) && c; });
-                if (candidate) {
-                    var result = find(candidate);
-                    if (result) {
-                        return result;
-                    }
-                }
-                return n;
-            }
-        }
-        function prepareRangeContainsErrorFunction(errors, originalRange) {
-            if (!errors.length) {
-                return rangeHasNoErrors;
-            }
-            var sorted = errors
-                .filter(function (d) { return ts.rangeOverlapsWithStartEnd(originalRange, d.start, d.start + d.length); })
-                .sort(function (e1, e2) { return e1.start - e2.start; });
-            if (!sorted.length) {
-                return rangeHasNoErrors;
-            }
-            var index = 0;
-            return function (r) {
-                while (true) {
-                    if (index >= sorted.length) {
-                        return false;
-                    }
-                    var error = sorted[index];
-                    if (r.end <= error.start) {
-                        return false;
-                    }
-                    if (ts.startEndOverlapsWithStartEnd(r.pos, r.end, error.start, error.start + error.length)) {
-                        return true;
-                    }
-                    index++;
-                }
-            };
-            function rangeHasNoErrors(r) {
-                return false;
-            }
-        }
-        function getScanStartPosition(enclosingNode, originalRange, sourceFile) {
-            var start = enclosingNode.getStart(sourceFile);
-            if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
-                return start;
-            }
-            var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile);
-            if (!precedingToken) {
-                return enclosingNode.pos;
-            }
-            if (precedingToken.end >= originalRange.pos) {
-                return enclosingNode.pos;
-            }
-            return precedingToken.end;
-        }
-        function getOwnOrInheritedDelta(n, options, sourceFile) {
-            var previousLine = -1;
-            var child;
-            while (n) {
-                var line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
-                if (previousLine !== -1 && line !== previousLine) {
-                    break;
-                }
-                if (formatting.SmartIndenter.shouldIndentChildNode(n, child)) {
-                    return options.IndentSize;
-                }
-                previousLine = line;
-                child = n;
-                n = n.parent;
-            }
-            return 0;
-        }
-        function formatSpan(originalRange, sourceFile, options, rulesProvider, requestKind) {
-            var rangeContainsError = prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange);
-            var formattingContext = new formatting.FormattingContext(sourceFile, requestKind);
-            var enclosingNode = findEnclosingNode(originalRange, sourceFile);
-            var formattingScanner = formatting.getFormattingScanner(sourceFile, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end);
-            var initialIndentation = formatting.SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options);
-            var previousRangeHasError;
-            var previousRange;
-            var previousParent;
-            var previousRangeStartLine;
-            var lastIndentedLine;
-            var indentationOnLastIndentedLine;
-            var edits = [];
-            formattingScanner.advance();
-            if (formattingScanner.isOnToken()) {
-                var startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
-                var undecoratedStartLine = startLine;
-                if (enclosingNode.decorators) {
-                    undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
-                }
-                var delta = getOwnOrInheritedDelta(enclosingNode, options, sourceFile);
-                processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
-            }
-            if (!formattingScanner.isOnToken()) {
-                var leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
-                if (leadingTrivia) {
-                    processTrivia(leadingTrivia, enclosingNode, enclosingNode, undefined);
-                    trimTrailingWhitespacesForRemainingRange();
-                }
-            }
-            formattingScanner.close();
-            return edits;
-            function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) {
-                if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) ||
-                    ts.rangeContainsStartEnd(range, startPos, endPos)) {
-                    if (inheritedIndentation !== -1) {
-                        return inheritedIndentation;
-                    }
-                }
-                else {
-                    var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
-                    var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile);
-                    var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
-                    if (startLine !== parentStartLine || startPos === column) {
-                        return column;
-                    }
-                }
-                return -1;
-            }
-            function computeIndentation(node, startLine, inheritedIndentation, parent, parentDynamicIndentation, effectiveParentStartLine) {
-                var indentation = inheritedIndentation;
-                var delta = formatting.SmartIndenter.shouldIndentChildNode(node) ? options.IndentSize : 0;
-                if (effectiveParentStartLine === startLine) {
-                    indentation = startLine === lastIndentedLine
-                        ? indentationOnLastIndentedLine
-                        : parentDynamicIndentation.getIndentation();
-                    delta = Math.min(options.IndentSize, parentDynamicIndentation.getDelta(node) + delta);
-                }
-                else if (indentation === -1) {
-                    if (formatting.SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement(parent, node, startLine, sourceFile)) {
-                        indentation = parentDynamicIndentation.getIndentation();
-                    }
-                    else {
-                        indentation = parentDynamicIndentation.getIndentation() + parentDynamicIndentation.getDelta(node);
-                    }
-                }
-                return {
-                    indentation: indentation,
-                    delta: delta
-                };
-            }
-            function getFirstNonDecoratorTokenOfNode(node) {
-                if (node.modifiers && node.modifiers.length) {
-                    return node.modifiers[0].kind;
-                }
-                switch (node.kind) {
-                    case 221: return 73;
-                    case 222: return 107;
-                    case 220: return 87;
-                    case 224: return 224;
-                    case 149: return 123;
-                    case 150: return 131;
-                    case 147:
-                        if (node.asteriskToken) {
-                            return 37;
-                        }
-                    case 145:
-                    case 142:
-                        return node.name.kind;
-                }
-            }
-            function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
-                return {
-                    getIndentationForComment: function (kind, tokenIndentation, container) {
-                        switch (kind) {
-                            case 16:
-                            case 20:
-                            case 18:
-                                return indentation + getEffectiveDelta(delta, container);
-                        }
-                        return tokenIndentation !== -1 ? tokenIndentation : indentation;
-                    },
-                    getIndentationForToken: function (line, kind, container) {
-                        if (nodeStartLine !== line && node.decorators) {
-                            if (kind === getFirstNonDecoratorTokenOfNode(node)) {
-                                return indentation;
-                            }
-                        }
-                        switch (kind) {
-                            case 15:
-                            case 16:
-                            case 19:
-                            case 20:
-                            case 17:
-                            case 18:
-                            case 80:
-                            case 104:
-                            case 55:
-                                return indentation;
-                            default:
-                                return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
-                        }
-                    },
-                    getIndentation: function () { return indentation; },
-                    getDelta: function (child) { return getEffectiveDelta(delta, child); },
-                    recomputeIndentation: function (lineAdded) {
-                        if (node.parent && formatting.SmartIndenter.shouldIndentChildNode(node.parent, node)) {
-                            if (lineAdded) {
-                                indentation += options.IndentSize;
-                            }
-                            else {
-                                indentation -= options.IndentSize;
-                            }
-                            if (formatting.SmartIndenter.shouldIndentChildNode(node)) {
-                                delta = options.IndentSize;
-                            }
-                            else {
-                                delta = 0;
-                            }
-                        }
-                    }
-                };
-                function getEffectiveDelta(delta, child) {
-                    return formatting.SmartIndenter.nodeWillIndentChild(node, child, true) ? delta : 0;
-                }
-            }
-            function processNode(node, contextNode, nodeStartLine, undecoratedNodeStartLine, indentation, delta) {
-                if (!ts.rangeOverlapsWithStartEnd(originalRange, node.getStart(sourceFile), node.getEnd())) {
-                    return;
-                }
-                var nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
-                var childContextNode = contextNode;
-                ts.forEachChild(node, function (child) {
-                    processChildNode(child, -1, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, false);
-                }, function (nodes) {
-                    processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
-                });
-                while (formattingScanner.isOnToken()) {
-                    var tokenInfo = formattingScanner.readTokenInfo(node);
-                    if (tokenInfo.token.end > node.end) {
-                        break;
-                    }
-                    consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation);
-                }
-                function processChildNode(child, inheritedIndentation, parent, parentDynamicIndentation, parentStartLine, undecoratedParentStartLine, isListItem, isFirstListItem) {
-                    var childStartPos = child.getStart(sourceFile);
-                    var childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
-                    var undecoratedChildStartLine = childStartLine;
-                    if (child.decorators) {
-                        undecoratedChildStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(child, sourceFile)).line;
-                    }
-                    var childIndentationAmount = -1;
-                    if (isListItem) {
-                        childIndentationAmount = tryComputeIndentationForListItem(childStartPos, child.end, parentStartLine, originalRange, inheritedIndentation);
-                        if (childIndentationAmount !== -1) {
-                            inheritedIndentation = childIndentationAmount;
-                        }
-                    }
-                    if (!ts.rangeOverlapsWithStartEnd(originalRange, child.pos, child.end)) {
-                        return inheritedIndentation;
-                    }
-                    if (child.getFullWidth() === 0) {
-                        return inheritedIndentation;
-                    }
-                    while (formattingScanner.isOnToken()) {
-                        var tokenInfo = formattingScanner.readTokenInfo(node);
-                        if (tokenInfo.token.end > childStartPos) {
-                            break;
-                        }
-                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation);
-                    }
-                    if (!formattingScanner.isOnToken()) {
-                        return inheritedIndentation;
-                    }
-                    if (ts.isToken(child)) {
-                        var tokenInfo = formattingScanner.readTokenInfo(child);
-                        ts.Debug.assert(tokenInfo.token.end === child.end);
-                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
-                        return inheritedIndentation;
-                    }
-                    var effectiveParentStartLine = child.kind === 143 ? childStartLine : undecoratedParentStartLine;
-                    var childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
-                    processNode(child, childContextNode, childStartLine, undecoratedChildStartLine, childIndentation.indentation, childIndentation.delta);
-                    childContextNode = node;
-                    if (isFirstListItem && parent.kind === 170 && inheritedIndentation === -1) {
-                        inheritedIndentation = childIndentation.indentation;
-                    }
-                    return inheritedIndentation;
-                }
-                function processChildNodes(nodes, parent, parentStartLine, parentDynamicIndentation) {
-                    var listStartToken = getOpenTokenForList(parent, nodes);
-                    var listEndToken = getCloseTokenForOpenToken(listStartToken);
-                    var listDynamicIndentation = parentDynamicIndentation;
-                    var startLine = parentStartLine;
-                    if (listStartToken !== 0) {
-                        while (formattingScanner.isOnToken()) {
-                            var tokenInfo = formattingScanner.readTokenInfo(parent);
-                            if (tokenInfo.token.end > nodes.pos) {
-                                break;
-                            }
-                            else if (tokenInfo.token.kind === listStartToken) {
-                                startLine = sourceFile.getLineAndCharacterOfPosition(tokenInfo.token.pos).line;
-                                var indentation_1 = computeIndentation(tokenInfo.token, startLine, -1, parent, parentDynamicIndentation, parentStartLine);
-                                listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation_1.indentation, indentation_1.delta);
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
-                            }
-                            else {
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation);
-                            }
-                        }
-                    }
-                    var inheritedIndentation = -1;
-                    for (var i = 0; i < nodes.length; i++) {
-                        var child = nodes[i];
-                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, true, i === 0);
-                    }
-                    if (listEndToken !== 0) {
-                        if (formattingScanner.isOnToken()) {
-                            var tokenInfo = formattingScanner.readTokenInfo(parent);
-                            if (tokenInfo.token.kind === listEndToken && ts.rangeContainsRange(parent, tokenInfo.token)) {
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
-                            }
-                        }
-                    }
-                }
-                function consumeTokenAndAdvanceScanner(currentTokenInfo, parent, dynamicIndentation, container) {
-                    ts.Debug.assert(ts.rangeContainsRange(parent, currentTokenInfo.token));
-                    var lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
-                    var indentToken = false;
-                    if (currentTokenInfo.leadingTrivia) {
-                        processTrivia(currentTokenInfo.leadingTrivia, parent, childContextNode, dynamicIndentation);
-                    }
-                    var lineAdded;
-                    var isTokenInRange = ts.rangeContainsRange(originalRange, currentTokenInfo.token);
-                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
-                    if (isTokenInRange) {
-                        var rangeHasError = rangeContainsError(currentTokenInfo.token);
-                        var savePreviousRange = previousRange;
-                        lineAdded = processRange(currentTokenInfo.token, tokenStart, parent, childContextNode, dynamicIndentation);
-                        if (rangeHasError) {
-                            indentToken = false;
-                        }
-                        else {
-                            if (lineAdded !== undefined) {
-                                indentToken = lineAdded;
-                            }
-                            else {
-                                var prevEndLine = savePreviousRange && sourceFile.getLineAndCharacterOfPosition(savePreviousRange.end).line;
-                                indentToken = lastTriviaWasNewLine && tokenStart.line !== prevEndLine;
-                            }
-                        }
-                    }
-                    if (currentTokenInfo.trailingTrivia) {
-                        processTrivia(currentTokenInfo.trailingTrivia, parent, childContextNode, dynamicIndentation);
-                    }
-                    if (indentToken) {
-                        var tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
-                            dynamicIndentation.getIndentationForToken(tokenStart.line, currentTokenInfo.token.kind, container) :
-                            -1;
-                        var indentNextTokenOrTrivia = true;
-                        if (currentTokenInfo.leadingTrivia) {
-                            var commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
-                            for (var _i = 0, _a = currentTokenInfo.leadingTrivia; _i < _a.length; _i++) {
-                                var triviaItem = _a[_i];
-                                var triviaInRange = ts.rangeContainsRange(originalRange, triviaItem);
-                                switch (triviaItem.kind) {
-                                    case 3:
-                                        if (triviaInRange) {
-                                            indentMultilineComment(triviaItem, commentIndentation, !indentNextTokenOrTrivia);
-                                        }
-                                        indentNextTokenOrTrivia = false;
-                                        break;
-                                    case 2:
-                                        if (indentNextTokenOrTrivia && triviaInRange) {
-                                            insertIndentation(triviaItem.pos, commentIndentation, false);
-                                        }
-                                        indentNextTokenOrTrivia = false;
-                                        break;
-                                    case 4:
-                                        indentNextTokenOrTrivia = true;
-                                        break;
-                                }
-                            }
-                        }
-                        if (tokenIndentation !== -1 && indentNextTokenOrTrivia) {
-                            insertIndentation(currentTokenInfo.token.pos, tokenIndentation, lineAdded);
-                            lastIndentedLine = tokenStart.line;
-                            indentationOnLastIndentedLine = tokenIndentation;
-                        }
-                    }
-                    formattingScanner.advance();
-                    childContextNode = parent;
-                }
-            }
-            function processTrivia(trivia, parent, contextNode, dynamicIndentation) {
-                for (var _i = 0, trivia_1 = trivia; _i < trivia_1.length; _i++) {
-                    var triviaItem = trivia_1[_i];
-                    if (ts.isComment(triviaItem.kind) && ts.rangeContainsRange(originalRange, triviaItem)) {
-                        var triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
-                        processRange(triviaItem, triviaItemStart, parent, contextNode, dynamicIndentation);
-                    }
-                }
-            }
-            function processRange(range, rangeStart, parent, contextNode, dynamicIndentation) {
-                var rangeHasError = rangeContainsError(range);
-                var lineAdded;
-                if (!rangeHasError && !previousRangeHasError) {
-                    if (!previousRange) {
-                        var originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
-                        trimTrailingWhitespacesForLines(originalStart.line, rangeStart.line);
-                    }
-                    else {
-                        lineAdded =
-                            processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation);
-                    }
-                }
-                previousRange = range;
-                previousParent = parent;
-                previousRangeStartLine = rangeStart.line;
-                previousRangeHasError = rangeHasError;
-                return lineAdded;
-            }
-            function processPair(currentItem, currentStartLine, currentParent, previousItem, previousStartLine, previousParent, contextNode, dynamicIndentation) {
-                formattingContext.updateContext(previousItem, previousParent, currentItem, currentParent, contextNode);
-                var rule = rulesProvider.getRulesMap().GetRule(formattingContext);
-                var trimTrailingWhitespaces;
-                var lineAdded;
-                if (rule) {
-                    applyRuleEdits(rule, previousItem, previousStartLine, currentItem, currentStartLine);
-                    if (rule.Operation.Action & (2 | 8) && currentStartLine !== previousStartLine) {
-                        lineAdded = false;
-                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(false);
-                        }
-                    }
-                    else if (rule.Operation.Action & 4 && currentStartLine === previousStartLine) {
-                        lineAdded = true;
-                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(true);
-                        }
-                    }
-                    trimTrailingWhitespaces = !(rule.Operation.Action & 8) && rule.Flag !== 1;
-                }
-                else {
-                    trimTrailingWhitespaces = true;
-                }
-                if (currentStartLine !== previousStartLine && trimTrailingWhitespaces) {
-                    trimTrailingWhitespacesForLines(previousStartLine, currentStartLine, previousItem);
-                }
-                return lineAdded;
-            }
-            function insertIndentation(pos, indentation, lineAdded) {
-                var indentationString = getIndentationString(indentation, options);
-                if (lineAdded) {
-                    recordReplace(pos, 0, indentationString);
-                }
-                else {
-                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
-                    var startLinePosition = ts.getStartPositionOfLine(tokenStart.line, sourceFile);
-                    if (indentation !== tokenStart.character || indentationIsDifferent(indentationString, startLinePosition)) {
-                        recordReplace(startLinePosition, tokenStart.character, indentationString);
-                    }
-                }
-            }
-            function indentationIsDifferent(indentationString, startLinePosition) {
-                return indentationString !== sourceFile.text.substr(startLinePosition, indentationString.length);
-            }
-            function indentMultilineComment(commentRange, indentation, firstLineIsIndented) {
-                var startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
-                var endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
-                var parts;
-                if (startLine === endLine) {
-                    if (!firstLineIsIndented) {
-                        insertIndentation(commentRange.pos, indentation, false);
-                    }
-                    return;
-                }
-                else {
-                    parts = [];
-                    var startPos = commentRange.pos;
-                    for (var line = startLine; line < endLine; line++) {
-                        var endOfLine = ts.getEndLinePosition(line, sourceFile);
-                        parts.push({ pos: startPos, end: endOfLine });
-                        startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
-                    }
-                    parts.push({ pos: startPos, end: commentRange.end });
-                }
-                var startLinePos = ts.getStartPositionOfLine(startLine, sourceFile);
-                var nonWhitespaceColumnInFirstPart = formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(startLinePos, parts[0].pos, sourceFile, options);
-                if (indentation === nonWhitespaceColumnInFirstPart.column) {
-                    return;
-                }
-                var startIndex = 0;
-                if (firstLineIsIndented) {
-                    startIndex = 1;
-                    startLine++;
-                }
-                var delta = indentation - nonWhitespaceColumnInFirstPart.column;
-                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
-                    var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
-                    var nonWhitespaceCharacterAndColumn = i === 0
-                        ? nonWhitespaceColumnInFirstPart
-                        : formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(parts[i].pos, parts[i].end, sourceFile, options);
-                    var newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
-                    if (newIndentation > 0) {
-                        var indentationString = getIndentationString(newIndentation, options);
-                        recordReplace(startLinePos_1, nonWhitespaceCharacterAndColumn.character, indentationString);
-                    }
-                    else {
-                        recordDelete(startLinePos_1, nonWhitespaceCharacterAndColumn.character);
-                    }
-                }
-            }
-            function trimTrailingWhitespacesForLines(line1, line2, range) {
-                for (var line = line1; line < line2; line++) {
-                    var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
-                    var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
-                    if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
-                        continue;
-                    }
-                    var whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
-                    if (whitespaceStart !== -1) {
-                        ts.Debug.assert(whitespaceStart === lineStartPosition || !ts.isWhiteSpace(sourceFile.text.charCodeAt(whitespaceStart - 1)));
-                        recordDelete(whitespaceStart, lineEndPosition + 1 - whitespaceStart);
-                    }
-                }
-            }
-            function getTrailingWhitespaceStartPosition(start, end) {
-                var pos = end;
-                while (pos >= start && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
-                    pos--;
-                }
-                if (pos !== end) {
-                    return pos + 1;
-                }
-                return -1;
-            }
-            function trimTrailingWhitespacesForRemainingRange() {
-                var startPosition = previousRange ? previousRange.end : originalRange.pos;
-                var startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
-                var endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
-                trimTrailingWhitespacesForLines(startLine, endLine + 1, previousRange);
-            }
-            function newTextChange(start, len, newText) {
-                return { span: ts.createTextSpan(start, len), newText: newText };
-            }
-            function recordDelete(start, len) {
-                if (len) {
-                    edits.push(newTextChange(start, len, ""));
-                }
-            }
-            function recordReplace(start, len, newText) {
-                if (len || newText) {
-                    edits.push(newTextChange(start, len, newText));
-                }
-            }
-            function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
-                switch (rule.Operation.Action) {
-                    case 1:
-                        return;
-                    case 8:
-                        if (previousRange.end !== currentRange.pos) {
-                            recordDelete(previousRange.end, currentRange.pos - previousRange.end);
-                        }
-                        break;
-                    case 4:
-                        if (rule.Flag !== 1 && previousStartLine !== currentStartLine) {
-                            return;
-                        }
-                        var lineDelta = currentStartLine - previousStartLine;
-                        if (lineDelta !== 1) {
-                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, options.NewLineCharacter);
-                        }
-                        break;
-                    case 2:
-                        if (rule.Flag !== 1 && previousStartLine !== currentStartLine) {
-                            return;
-                        }
-                        var posDelta = currentRange.pos - previousRange.end;
-                        if (posDelta !== 1 || sourceFile.text.charCodeAt(previousRange.end) !== 32) {
-                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, " ");
-                        }
-                        break;
-                }
-            }
-        }
-        function getOpenTokenForList(node, list) {
-            switch (node.kind) {
-                case 148:
-                case 220:
-                case 179:
-                case 147:
-                case 146:
-                case 180:
-                    if (node.typeParameters === list) {
-                        return 25;
-                    }
-                    else if (node.parameters === list) {
-                        return 17;
-                    }
-                    break;
-                case 174:
-                case 175:
-                    if (node.typeArguments === list) {
-                        return 25;
-                    }
-                    else if (node.arguments === list) {
-                        return 17;
-                    }
-                    break;
-                case 155:
-                    if (node.typeArguments === list) {
-                        return 25;
-                    }
-            }
-            return 0;
-        }
-        function getCloseTokenForOpenToken(kind) {
-            switch (kind) {
-                case 17:
-                    return 18;
-                case 25:
-                    return 27;
-            }
-            return 0;
-        }
-        var internedSizes;
-        var internedTabsIndentation;
-        var internedSpacesIndentation;
-        function getIndentationString(indentation, options) {
-            var resetInternedStrings = !internedSizes || (internedSizes.tabSize !== options.TabSize || internedSizes.indentSize !== options.IndentSize);
-            if (resetInternedStrings) {
-                internedSizes = { tabSize: options.TabSize, indentSize: options.IndentSize };
-                internedTabsIndentation = internedSpacesIndentation = undefined;
-            }
-            if (!options.ConvertTabsToSpaces) {
-                var tabs = Math.floor(indentation / options.TabSize);
-                var spaces = indentation - tabs * options.TabSize;
-                var tabString = void 0;
-                if (!internedTabsIndentation) {
-                    internedTabsIndentation = [];
-                }
-                if (internedTabsIndentation[tabs] === undefined) {
-                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
-                }
-                else {
-                    tabString = internedTabsIndentation[tabs];
-                }
-                return spaces ? tabString + repeat(" ", spaces) : tabString;
-            }
-            else {
-                var spacesString = void 0;
-                var quotient = Math.floor(indentation / options.IndentSize);
-                var remainder = indentation % options.IndentSize;
-                if (!internedSpacesIndentation) {
-                    internedSpacesIndentation = [];
-                }
-                if (internedSpacesIndentation[quotient] === undefined) {
-                    spacesString = repeat(" ", options.IndentSize * quotient);
-                    internedSpacesIndentation[quotient] = spacesString;
-                }
-                else {
-                    spacesString = internedSpacesIndentation[quotient];
-                }
-                return remainder ? spacesString + repeat(" ", remainder) : spacesString;
-            }
-            function repeat(value, count) {
-                var s = "";
-                for (var i = 0; i < count; i++) {
-                    s += value;
-                }
-                return s;
-            }
-        }
-        formatting.getIndentationString = getIndentationString;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var SmartIndenter;
-        (function (SmartIndenter) {
-            function getIndentation(position, sourceFile, options) {
-                if (position > sourceFile.text.length) {
-                    return 0;
-                }
-                if (options.IndentStyle === ts.IndentStyle.None) {
-                    return 0;
-                }
-                var precedingToken = ts.findPrecedingToken(position, sourceFile);
-                if (!precedingToken) {
-                    return 0;
-                }
-                var precedingTokenIsLiteral = ts.isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
-                if (precedingTokenIsLiteral && precedingToken.getStart(sourceFile) <= position && precedingToken.end > position) {
-                    return 0;
-                }
-                var lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
-                if (options.IndentStyle === ts.IndentStyle.Block) {
-                    var current_1 = position;
-                    while (current_1 > 0) {
-                        var char = sourceFile.text.charCodeAt(current_1);
-                        if (!ts.isWhiteSpace(char) && !ts.isLineBreak(char)) {
-                            break;
-                        }
-                        current_1--;
-                    }
-                    var lineStart = ts.getLineStartPositionForPosition(current_1, sourceFile);
-                    return SmartIndenter.findFirstNonWhitespaceColumn(lineStart, current_1, sourceFile, options);
-                }
-                if (precedingToken.kind === 24 && precedingToken.parent.kind !== 187) {
-                    var actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
-                    if (actualIndentation !== -1) {
-                        return actualIndentation;
-                    }
-                }
-                var previous;
-                var current = precedingToken;
-                var currentStart;
-                var indentationDelta;
-                while (current) {
-                    if (ts.positionBelongsToNode(current, position, sourceFile) && shouldIndentChildNode(current, previous)) {
-                        currentStart = getStartLineAndCharacterForNode(current, sourceFile);
-                        if (nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile)) {
-                            indentationDelta = 0;
-                        }
-                        else {
-                            indentationDelta = lineAtPosition !== currentStart.line ? options.IndentSize : 0;
-                        }
-                        break;
-                    }
-                    var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
-                    if (actualIndentation !== -1) {
-                        return actualIndentation;
-                    }
-                    actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
-                    if (actualIndentation !== -1) {
-                        return actualIndentation + options.IndentSize;
-                    }
-                    previous = current;
-                    current = current.parent;
-                }
-                if (!current) {
-                    return 0;
-                }
-                return getIndentationForNodeWorker(current, currentStart, undefined, indentationDelta, sourceFile, options);
-            }
-            SmartIndenter.getIndentation = getIndentation;
-            function getIndentationForNode(n, ignoreActualIndentationRange, sourceFile, options) {
-                var start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
-                return getIndentationForNodeWorker(n, start, ignoreActualIndentationRange, 0, sourceFile, options);
-            }
-            SmartIndenter.getIndentationForNode = getIndentationForNode;
-            function getIndentationForNodeWorker(current, currentStart, ignoreActualIndentationRange, indentationDelta, sourceFile, options) {
-                var parent = current.parent;
-                var parentStart;
-                while (parent) {
-                    var useActualIndentation = true;
-                    if (ignoreActualIndentationRange) {
-                        var start = current.getStart(sourceFile);
-                        useActualIndentation = start < ignoreActualIndentationRange.pos || start > ignoreActualIndentationRange.end;
-                    }
-                    if (useActualIndentation) {
-                        var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
-                        if (actualIndentation !== -1) {
-                            return actualIndentation + indentationDelta;
-                        }
-                    }
-                    parentStart = getParentStart(parent, current, sourceFile);
-                    var parentAndChildShareLine = parentStart.line === currentStart.line ||
-                        childStartsOnTheSameLineWithElseInIfStatement(parent, current, currentStart.line, sourceFile);
-                    if (useActualIndentation) {
-                        var actualIndentation = getActualIndentationForNode(current, parent, currentStart, parentAndChildShareLine, sourceFile, options);
-                        if (actualIndentation !== -1) {
-                            return actualIndentation + indentationDelta;
-                        }
-                        actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
-                        if (actualIndentation !== -1) {
-                            return actualIndentation + indentationDelta;
-                        }
-                    }
-                    if (shouldIndentChildNode(parent, current) && !parentAndChildShareLine) {
-                        indentationDelta += options.IndentSize;
-                    }
-                    current = parent;
-                    currentStart = parentStart;
-                    parent = current.parent;
-                }
-                return indentationDelta;
-            }
-            function getParentStart(parent, child, sourceFile) {
-                var containingList = getContainingList(child, sourceFile);
-                if (containingList) {
-                    return sourceFile.getLineAndCharacterOfPosition(containingList.pos);
-                }
-                return sourceFile.getLineAndCharacterOfPosition(parent.getStart(sourceFile));
-            }
-            function getActualIndentationForListItemBeforeComma(commaToken, sourceFile, options) {
-                var commaItemInfo = ts.findListItemInfo(commaToken);
-                if (commaItemInfo && commaItemInfo.listItemIndex > 0) {
-                    return deriveActualIndentationFromList(commaItemInfo.list.getChildren(), commaItemInfo.listItemIndex - 1, sourceFile, options);
-                }
-                else {
-                    return -1;
-                }
-            }
-            function getActualIndentationForNode(current, parent, currentLineAndChar, parentAndChildShareLine, sourceFile, options) {
-                var useActualIndentation = (ts.isDeclaration(current) || ts.isStatement(current)) &&
-                    (parent.kind === 256 || !parentAndChildShareLine);
-                if (!useActualIndentation) {
-                    return -1;
-                }
-                return findColumnForFirstNonWhitespaceCharacterInLine(currentLineAndChar, sourceFile, options);
-            }
-            function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile) {
-                var nextToken = ts.findNextToken(precedingToken, current);
-                if (!nextToken) {
-                    return false;
-                }
-                if (nextToken.kind === 15) {
-                    return true;
-                }
-                else if (nextToken.kind === 16) {
-                    var nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
-                    return lineAtPosition === nextTokenStartLine;
-                }
-                return false;
-            }
-            function getStartLineAndCharacterForNode(n, sourceFile) {
-                return sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
-            }
-            function childStartsOnTheSameLineWithElseInIfStatement(parent, child, childStartLine, sourceFile) {
-                if (parent.kind === 203 && parent.elseStatement === child) {
-                    var elseKeyword = ts.findChildOfKind(parent, 80, sourceFile);
-                    ts.Debug.assert(elseKeyword !== undefined);
-                    var elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
-                    return elseKeywordStartLine === childStartLine;
-                }
-                return false;
-            }
-            SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement = childStartsOnTheSameLineWithElseInIfStatement;
-            function getContainingList(node, sourceFile) {
-                if (node.parent) {
-                    switch (node.parent.kind) {
-                        case 155:
-                            if (node.parent.typeArguments &&
-                                ts.rangeContainsStartEnd(node.parent.typeArguments, node.getStart(sourceFile), node.getEnd())) {
-                                return node.parent.typeArguments;
-                            }
-                            break;
-                        case 171:
-                            return node.parent.properties;
-                        case 170:
-                            return node.parent.elements;
-                        case 220:
-                        case 179:
-                        case 180:
-                        case 147:
-                        case 146:
-                        case 151:
-                        case 152: {
-                            var start = node.getStart(sourceFile);
-                            if (node.parent.typeParameters &&
-                                ts.rangeContainsStartEnd(node.parent.typeParameters, start, node.getEnd())) {
-                                return node.parent.typeParameters;
-                            }
-                            if (ts.rangeContainsStartEnd(node.parent.parameters, start, node.getEnd())) {
-                                return node.parent.parameters;
-                            }
-                            break;
-                        }
-                        case 175:
-                        case 174: {
-                            var start = node.getStart(sourceFile);
-                            if (node.parent.typeArguments &&
-                                ts.rangeContainsStartEnd(node.parent.typeArguments, start, node.getEnd())) {
-                                return node.parent.typeArguments;
-                            }
-                            if (node.parent.arguments &&
-                                ts.rangeContainsStartEnd(node.parent.arguments, start, node.getEnd())) {
-                                return node.parent.arguments;
-                            }
-                            break;
-                        }
-                    }
-                }
-                return undefined;
-            }
-            function getActualIndentationForListItem(node, sourceFile, options) {
-                var containingList = getContainingList(node, sourceFile);
-                return containingList ? getActualIndentationFromList(containingList) : -1;
-                function getActualIndentationFromList(list) {
-                    var index = ts.indexOf(list, node);
-                    return index !== -1 ? deriveActualIndentationFromList(list, index, sourceFile, options) : -1;
-                }
-            }
-            function getLineIndentationWhenExpressionIsInMultiLine(node, sourceFile, options) {
-                if (node.kind === 18) {
-                    return -1;
-                }
-                if (node.parent && (node.parent.kind === 174 ||
-                    node.parent.kind === 175) &&
-                    node.parent.expression !== node) {
-                    var fullCallOrNewExpression = node.parent.expression;
-                    var startingExpression = getStartingExpression(fullCallOrNewExpression);
-                    if (fullCallOrNewExpression === startingExpression) {
-                        return -1;
-                    }
-                    var fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
-                    var startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
-                    if (fullCallOrNewExpressionEnd.line === startingExpressionEnd.line) {
-                        return -1;
-                    }
-                    return findColumnForFirstNonWhitespaceCharacterInLine(fullCallOrNewExpressionEnd, sourceFile, options);
-                }
-                return -1;
-                function getStartingExpression(node) {
-                    while (true) {
-                        switch (node.kind) {
-                            case 174:
-                            case 175:
-                            case 172:
-                            case 173:
-                                node = node.expression;
-                                break;
-                            default:
-                                return node;
-                        }
-                    }
-                }
-            }
-            function deriveActualIndentationFromList(list, index, sourceFile, options) {
-                ts.Debug.assert(index >= 0 && index < list.length);
-                var node = list[index];
-                var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
-                for (var i = index - 1; i >= 0; i--) {
-                    if (list[i].kind === 24) {
-                        continue;
-                    }
-                    var prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
-                    if (prevEndLine !== lineAndCharacter.line) {
-                        return findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options);
-                    }
-                    lineAndCharacter = getStartLineAndCharacterForNode(list[i], sourceFile);
-                }
-                return -1;
-            }
-            function findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options) {
-                var lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
-                return findFirstNonWhitespaceColumn(lineStart, lineStart + lineAndCharacter.character, sourceFile, options);
-            }
-            function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
-                var character = 0;
-                var column = 0;
-                for (var pos = startPos; pos < endPos; pos++) {
-                    var ch = sourceFile.text.charCodeAt(pos);
-                    if (!ts.isWhiteSpace(ch)) {
-                        break;
-                    }
-                    if (ch === 9) {
-                        column += options.TabSize + (column % options.TabSize);
-                    }
-                    else {
-                        column++;
-                    }
-                    character++;
-                }
-                return { column: column, character: character };
-            }
-            SmartIndenter.findFirstNonWhitespaceCharacterAndColumn = findFirstNonWhitespaceCharacterAndColumn;
-            function findFirstNonWhitespaceColumn(startPos, endPos, sourceFile, options) {
-                return findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options).column;
-            }
-            SmartIndenter.findFirstNonWhitespaceColumn = findFirstNonWhitespaceColumn;
-            function nodeContentIsAlwaysIndented(kind) {
-                switch (kind) {
-                    case 202:
-                    case 221:
-                    case 192:
-                    case 222:
-                    case 224:
-                    case 223:
-                    case 170:
-                    case 199:
-                    case 226:
-                    case 171:
-                    case 159:
-                    case 161:
-                    case 227:
-                    case 250:
-                    case 249:
-                    case 178:
-                    case 172:
-                    case 174:
-                    case 175:
-                    case 200:
-                    case 218:
-                    case 235:
-                    case 211:
-                    case 188:
-                    case 168:
-                    case 167:
-                    case 243:
-                    case 242:
-                    case 248:
-                    case 146:
-                    case 151:
-                    case 152:
-                    case 142:
-                    case 156:
-                    case 157:
-                    case 164:
-                    case 176:
-                    case 184:
-                    case 233:
-                        return true;
-                }
-                return false;
-            }
-            function nodeWillIndentChild(parent, child, indentByDefault) {
-                var childKind = child ? child.kind : 0;
-                switch (parent.kind) {
-                    case 204:
-                    case 205:
-                    case 207:
-                    case 208:
-                    case 206:
-                    case 203:
-                    case 220:
-                    case 179:
-                    case 147:
-                    case 180:
-                    case 148:
-                    case 149:
-                    case 150:
-                        return childKind !== 199;
-                    case 241:
-                        return childKind !== 245;
-                }
-                return indentByDefault;
-            }
-            SmartIndenter.nodeWillIndentChild = nodeWillIndentChild;
-            function shouldIndentChildNode(parent, child) {
-                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, false);
-            }
-            SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
-        })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    ts.servicesVersion = "0.5";
-    var ScriptSnapshot;
-    (function (ScriptSnapshot) {
-        var StringScriptSnapshot = (function () {
-            function StringScriptSnapshot(text) {
-                this.text = text;
-            }
-            StringScriptSnapshot.prototype.getText = function (start, end) {
-                return this.text.substring(start, end);
-            };
-            StringScriptSnapshot.prototype.getLength = function () {
-                return this.text.length;
-            };
-            StringScriptSnapshot.prototype.getChangeRange = function (oldSnapshot) {
-                return undefined;
-            };
-            return StringScriptSnapshot;
-        }());
-        function fromString(text) {
-            return new StringScriptSnapshot(text);
-        }
-        ScriptSnapshot.fromString = fromString;
-    })(ScriptSnapshot = ts.ScriptSnapshot || (ts.ScriptSnapshot = {}));
-    var scanner = ts.createScanner(2, true);
-    var emptyArray = [];
-    var jsDocTagNames = [
-        "augments",
-        "author",
-        "argument",
-        "borrows",
-        "class",
-        "constant",
-        "constructor",
-        "constructs",
-        "default",
-        "deprecated",
-        "description",
-        "event",
-        "example",
-        "extends",
-        "field",
-        "fileOverview",
-        "function",
-        "ignore",
-        "inner",
-        "lends",
-        "link",
-        "memberOf",
-        "name",
-        "namespace",
-        "param",
-        "private",
-        "property",
-        "public",
-        "requires",
-        "returns",
-        "see",
-        "since",
-        "static",
-        "throws",
-        "type",
-        "version"
-    ];
-    var jsDocCompletionEntries;
-    function createNode(kind, pos, end, flags, parent) {
-        var node = new NodeObject(kind, pos, end);
-        node.flags = flags;
-        node.parent = parent;
-        return node;
-    }
-    var NodeObject = (function () {
-        function NodeObject(kind, pos, end) {
-            this.kind = kind;
-            this.pos = pos;
-            this.end = end;
-            this.flags = 0;
-            this.parent = undefined;
-        }
-        NodeObject.prototype.getSourceFile = function () {
-            return ts.getSourceFileOfNode(this);
-        };
-        NodeObject.prototype.getStart = function (sourceFile) {
-            return ts.getTokenPosOfNode(this, sourceFile);
-        };
-        NodeObject.prototype.getFullStart = function () {
-            return this.pos;
-        };
-        NodeObject.prototype.getEnd = function () {
-            return this.end;
-        };
-        NodeObject.prototype.getWidth = function (sourceFile) {
-            return this.getEnd() - this.getStart(sourceFile);
-        };
-        NodeObject.prototype.getFullWidth = function () {
-            return this.end - this.pos;
-        };
-        NodeObject.prototype.getLeadingTriviaWidth = function (sourceFile) {
-            return this.getStart(sourceFile) - this.pos;
-        };
-        NodeObject.prototype.getFullText = function (sourceFile) {
-            return (sourceFile || this.getSourceFile()).text.substring(this.pos, this.end);
-        };
-        NodeObject.prototype.getText = function (sourceFile) {
-            return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
-        };
-        NodeObject.prototype.addSyntheticNodes = function (nodes, pos, end) {
-            scanner.setTextPos(pos);
-            while (pos < end) {
-                var token = scanner.scan();
-                var textPos = scanner.getTextPos();
-                nodes.push(createNode(token, pos, textPos, 0, this));
-                pos = textPos;
-            }
-            return pos;
-        };
-        NodeObject.prototype.createSyntaxList = function (nodes) {
-            var list = createNode(279, nodes.pos, nodes.end, 0, this);
-            list._children = [];
-            var pos = nodes.pos;
-            for (var _i = 0, nodes_7 = nodes; _i < nodes_7.length; _i++) {
-                var node = nodes_7[_i];
-                if (pos < node.pos) {
-                    pos = this.addSyntheticNodes(list._children, pos, node.pos);
-                }
-                list._children.push(node);
-                pos = node.end;
-            }
-            if (pos < nodes.end) {
-                this.addSyntheticNodes(list._children, pos, nodes.end);
-            }
-            return list;
-        };
-        NodeObject.prototype.createChildren = function (sourceFile) {
-            var _this = this;
-            var children;
-            if (this.kind >= 139) {
-                scanner.setText((sourceFile || this.getSourceFile()).text);
-                children = [];
-                var pos_3 = this.pos;
-                var processNode = function (node) {
-                    if (pos_3 < node.pos) {
-                        pos_3 = _this.addSyntheticNodes(children, pos_3, node.pos);
-                    }
-                    children.push(node);
-                    pos_3 = node.end;
-                };
-                var processNodes = function (nodes) {
-                    if (pos_3 < nodes.pos) {
-                        pos_3 = _this.addSyntheticNodes(children, pos_3, nodes.pos);
-                    }
-                    children.push(_this.createSyntaxList(nodes));
-                    pos_3 = nodes.end;
-                };
-                ts.forEachChild(this, processNode, processNodes);
-                if (pos_3 < this.end) {
-                    this.addSyntheticNodes(children, pos_3, this.end);
-                }
-                scanner.setText(undefined);
-            }
-            this._children = children || emptyArray;
-        };
-        NodeObject.prototype.getChildCount = function (sourceFile) {
-            if (!this._children)
-                this.createChildren(sourceFile);
-            return this._children.length;
-        };
-        NodeObject.prototype.getChildAt = function (index, sourceFile) {
-            if (!this._children)
-                this.createChildren(sourceFile);
-            return this._children[index];
-        };
-        NodeObject.prototype.getChildren = function (sourceFile) {
-            if (!this._children)
-                this.createChildren(sourceFile);
-            return this._children;
-        };
-        NodeObject.prototype.getFirstToken = function (sourceFile) {
-            var children = this.getChildren(sourceFile);
-            if (!children.length) {
-                return undefined;
-            }
-            var child = children[0];
-            return child.kind < 139 ? child : child.getFirstToken(sourceFile);
-        };
-        NodeObject.prototype.getLastToken = function (sourceFile) {
-            var children = this.getChildren(sourceFile);
-            var child = ts.lastOrUndefined(children);
-            if (!child) {
-                return undefined;
-            }
-            return child.kind < 139 ? child : child.getLastToken(sourceFile);
-        };
-        return NodeObject;
-    }());
-    var SymbolObject = (function () {
-        function SymbolObject(flags, name) {
-            this.flags = flags;
-            this.name = name;
-        }
-        SymbolObject.prototype.getFlags = function () {
-            return this.flags;
-        };
-        SymbolObject.prototype.getName = function () {
-            return this.name;
-        };
-        SymbolObject.prototype.getDeclarations = function () {
-            return this.declarations;
-        };
-        SymbolObject.prototype.getDocumentationComment = function () {
-            if (this.documentationComment === undefined) {
-                this.documentationComment = getJsDocCommentsFromDeclarations(this.declarations, this.name, !(this.flags & 4));
-            }
-            return this.documentationComment;
-        };
-        return SymbolObject;
-    }());
-    function getJsDocCommentsFromDeclarations(declarations, name, canUseParsedParamTagComments) {
-        var documentationComment = [];
-        var docComments = getJsDocCommentsSeparatedByNewLines();
-        ts.forEach(docComments, function (docComment) {
-            if (documentationComment.length) {
-                documentationComment.push(ts.lineBreakPart());
-            }
-            documentationComment.push(docComment);
-        });
-        return documentationComment;
-        function getJsDocCommentsSeparatedByNewLines() {
-            var paramTag = "@param";
-            var jsDocCommentParts = [];
-            ts.forEach(declarations, function (declaration, indexOfDeclaration) {
-                if (ts.indexOf(declarations, declaration) === indexOfDeclaration) {
-                    var sourceFileOfDeclaration_1 = ts.getSourceFileOfNode(declaration);
-                    if (canUseParsedParamTagComments && declaration.kind === 142) {
-                        ts.forEach(getJsDocCommentTextRange(declaration.parent, sourceFileOfDeclaration_1), function (jsDocCommentTextRange) {
-                            var cleanedParamJsDocComment = getCleanedParamJsDocComment(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration_1);
-                            if (cleanedParamJsDocComment) {
-                                ts.addRange(jsDocCommentParts, cleanedParamJsDocComment);
-                            }
-                        });
-                    }
-                    if (declaration.kind === 225 && declaration.body.kind === 225) {
-                        return;
-                    }
-                    while (declaration.kind === 225 && declaration.parent.kind === 225) {
-                        declaration = declaration.parent;
-                    }
-                    ts.forEach(getJsDocCommentTextRange(declaration.kind === 218 ? declaration.parent.parent : declaration, sourceFileOfDeclaration_1), function (jsDocCommentTextRange) {
-                        var cleanedJsDocComment = getCleanedJsDocComment(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration_1);
-                        if (cleanedJsDocComment) {
-                            ts.addRange(jsDocCommentParts, cleanedJsDocComment);
-                        }
-                    });
-                }
-            });
-            return jsDocCommentParts;
-            function getJsDocCommentTextRange(node, sourceFile) {
-                return ts.map(ts.getJsDocComments(node, sourceFile), function (jsDocComment) {
-                    return {
-                        pos: jsDocComment.pos + "/*".length,
-                        end: jsDocComment.end - "*/".length
-                    };
-                });
-            }
-            function consumeWhiteSpacesOnTheLine(pos, end, sourceFile, maxSpacesToRemove) {
-                if (maxSpacesToRemove !== undefined) {
-                    end = Math.min(end, pos + maxSpacesToRemove);
-                }
-                for (; pos < end; pos++) {
-                    var ch = sourceFile.text.charCodeAt(pos);
-                    if (!ts.isWhiteSpace(ch) || ts.isLineBreak(ch)) {
-                        return pos;
-                    }
-                }
-                return end;
-            }
-            function consumeLineBreaks(pos, end, sourceFile) {
-                while (pos < end && ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
-                    pos++;
-                }
-                return pos;
-            }
-            function isName(pos, end, sourceFile, name) {
-                return pos + name.length < end &&
-                    sourceFile.text.substr(pos, name.length) === name &&
-                    (ts.isWhiteSpace(sourceFile.text.charCodeAt(pos + name.length)) ||
-                        ts.isLineBreak(sourceFile.text.charCodeAt(pos + name.length)));
-            }
-            function isParamTag(pos, end, sourceFile) {
-                return isName(pos, end, sourceFile, paramTag);
-            }
-            function pushDocCommentLineText(docComments, text, blankLineCount) {
-                while (blankLineCount) {
-                    blankLineCount--;
-                    docComments.push(ts.textPart(""));
-                }
-                docComments.push(ts.textPart(text));
-            }
-            function getCleanedJsDocComment(pos, end, sourceFile) {
-                var spacesToRemoveAfterAsterisk;
-                var docComments = [];
-                var blankLineCount = 0;
-                var isInParamTag = false;
-                while (pos < end) {
-                    var docCommentTextOfLine = "";
-                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile);
-                    if (pos < end && sourceFile.text.charCodeAt(pos) === 42) {
-                        var lineStartPos = pos + 1;
-                        pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, spacesToRemoveAfterAsterisk);
-                        if (spacesToRemoveAfterAsterisk === undefined && pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
-                            spacesToRemoveAfterAsterisk = pos - lineStartPos;
-                        }
-                    }
-                    else if (spacesToRemoveAfterAsterisk === undefined) {
-                        spacesToRemoveAfterAsterisk = 0;
-                    }
-                    while (pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
-                        var ch = sourceFile.text.charAt(pos);
-                        if (ch === "@") {
-                            if (isParamTag(pos, end, sourceFile)) {
-                                isInParamTag = true;
-                                pos += paramTag.length;
-                                continue;
-                            }
-                            else {
-                                isInParamTag = false;
-                            }
-                        }
-                        if (!isInParamTag) {
-                            docCommentTextOfLine += ch;
-                        }
-                        pos++;
-                    }
-                    pos = consumeLineBreaks(pos, end, sourceFile);
-                    if (docCommentTextOfLine) {
-                        pushDocCommentLineText(docComments, docCommentTextOfLine, blankLineCount);
-                        blankLineCount = 0;
-                    }
-                    else if (!isInParamTag && docComments.length) {
-                        blankLineCount++;
-                    }
-                }
-                return docComments;
-            }
-            function getCleanedParamJsDocComment(pos, end, sourceFile) {
-                var paramHelpStringMargin;
-                var paramDocComments = [];
-                while (pos < end) {
-                    if (isParamTag(pos, end, sourceFile)) {
-                        var blankLineCount = 0;
-                        var recordedParamTag = false;
-                        pos = consumeWhiteSpaces(pos + paramTag.length);
-                        if (pos >= end) {
-                            break;
-                        }
-                        if (sourceFile.text.charCodeAt(pos) === 123) {
-                            pos++;
-                            for (var curlies = 1; pos < end; pos++) {
-                                var charCode = sourceFile.text.charCodeAt(pos);
-                                if (charCode === 123) {
-                                    curlies++;
-                                    continue;
-                                }
-                                if (charCode === 125) {
-                                    curlies--;
-                                    if (curlies === 0) {
-                                        pos++;
-                                        break;
-                                    }
-                                    else {
-                                        continue;
-                                    }
-                                }
-                                if (charCode === 64) {
-                                    break;
-                                }
-                            }
-                            pos = consumeWhiteSpaces(pos);
-                            if (pos >= end) {
-                                break;
-                            }
-                        }
-                        if (isName(pos, end, sourceFile, name)) {
-                            pos = consumeWhiteSpaces(pos + name.length);
-                            if (pos >= end) {
-                                break;
-                            }
-                            var paramHelpString = "";
-                            var firstLineParamHelpStringPos = pos;
-                            while (pos < end) {
-                                var ch = sourceFile.text.charCodeAt(pos);
-                                if (ts.isLineBreak(ch)) {
-                                    if (paramHelpString) {
-                                        pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
-                                        paramHelpString = "";
-                                        blankLineCount = 0;
-                                        recordedParamTag = true;
-                                    }
-                                    else if (recordedParamTag) {
-                                        blankLineCount++;
-                                    }
-                                    setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos);
-                                    continue;
-                                }
-                                if (ch === 64) {
-                                    break;
-                                }
-                                paramHelpString += sourceFile.text.charAt(pos);
-                                pos++;
-                            }
-                            if (paramHelpString) {
-                                pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
-                            }
-                            paramHelpStringMargin = undefined;
-                        }
-                        if (sourceFile.text.charCodeAt(pos) === 64) {
-                            continue;
-                        }
-                    }
-                    pos++;
-                }
-                return paramDocComments;
-                function consumeWhiteSpaces(pos) {
-                    while (pos < end && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
-                        pos++;
-                    }
-                    return pos;
-                }
-                function setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos) {
-                    pos = consumeLineBreaks(pos, end, sourceFile);
-                    if (pos >= end) {
-                        return;
-                    }
-                    if (paramHelpStringMargin === undefined) {
-                        paramHelpStringMargin = sourceFile.getLineAndCharacterOfPosition(firstLineParamHelpStringPos).character;
-                    }
-                    var startOfLinePos = pos;
-                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile, paramHelpStringMargin);
-                    if (pos >= end) {
-                        return;
-                    }
-                    var consumedSpaces = pos - startOfLinePos;
-                    if (consumedSpaces < paramHelpStringMargin) {
-                        var ch = sourceFile.text.charCodeAt(pos);
-                        if (ch === 42) {
-                            pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, paramHelpStringMargin - consumedSpaces - 1);
-                        }
-                    }
-                }
-            }
-        }
-    }
-    var TypeObject = (function () {
-        function TypeObject(checker, flags) {
-            this.checker = checker;
-            this.flags = flags;
-        }
-        TypeObject.prototype.getFlags = function () {
-            return this.flags;
-        };
-        TypeObject.prototype.getSymbol = function () {
-            return this.symbol;
-        };
-        TypeObject.prototype.getProperties = function () {
-            return this.checker.getPropertiesOfType(this);
-        };
-        TypeObject.prototype.getProperty = function (propertyName) {
-            return this.checker.getPropertyOfType(this, propertyName);
-        };
-        TypeObject.prototype.getApparentProperties = function () {
-            return this.checker.getAugmentedPropertiesOfType(this);
-        };
-        TypeObject.prototype.getCallSignatures = function () {
-            return this.checker.getSignaturesOfType(this, 0);
-        };
-        TypeObject.prototype.getConstructSignatures = function () {
-            return this.checker.getSignaturesOfType(this, 1);
-        };
-        TypeObject.prototype.getStringIndexType = function () {
-            return this.checker.getIndexTypeOfType(this, 0);
-        };
-        TypeObject.prototype.getNumberIndexType = function () {
-            return this.checker.getIndexTypeOfType(this, 1);
-        };
-        TypeObject.prototype.getBaseTypes = function () {
-            return this.flags & (1024 | 2048)
-                ? this.checker.getBaseTypes(this)
-                : undefined;
-        };
-        TypeObject.prototype.getNonNullableType = function () {
-            return this.checker.getNonNullableType(this);
-        };
-        return TypeObject;
-    }());
-    var SignatureObject = (function () {
-        function SignatureObject(checker) {
-            this.checker = checker;
-        }
-        SignatureObject.prototype.getDeclaration = function () {
-            return this.declaration;
-        };
-        SignatureObject.prototype.getTypeParameters = function () {
-            return this.typeParameters;
-        };
-        SignatureObject.prototype.getParameters = function () {
-            return this.parameters;
-        };
-        SignatureObject.prototype.getReturnType = function () {
-            return this.checker.getReturnTypeOfSignature(this);
-        };
-        SignatureObject.prototype.getDocumentationComment = function () {
-            if (this.documentationComment === undefined) {
-                this.documentationComment = this.declaration ? getJsDocCommentsFromDeclarations([this.declaration], undefined, false) : [];
-            }
-            return this.documentationComment;
-        };
-        return SignatureObject;
-    }());
-    var SourceFileObject = (function (_super) {
-        __extends(SourceFileObject, _super);
-        function SourceFileObject(kind, pos, end) {
-            _super.call(this, kind, pos, end);
-        }
-        SourceFileObject.prototype.update = function (newText, textChangeRange) {
-            return ts.updateSourceFile(this, newText, textChangeRange);
-        };
-        SourceFileObject.prototype.getLineAndCharacterOfPosition = function (position) {
-            return ts.getLineAndCharacterOfPosition(this, position);
-        };
-        SourceFileObject.prototype.getLineStarts = function () {
-            return ts.getLineStarts(this);
-        };
-        SourceFileObject.prototype.getPositionOfLineAndCharacter = function (line, character) {
-            return ts.getPositionOfLineAndCharacter(this, line, character);
-        };
-        SourceFileObject.prototype.getNamedDeclarations = function () {
-            if (!this.namedDeclarations) {
-                this.namedDeclarations = this.computeNamedDeclarations();
-            }
-            return this.namedDeclarations;
-        };
-        SourceFileObject.prototype.computeNamedDeclarations = function () {
-            var result = {};
-            ts.forEachChild(this, visit);
-            return result;
-            function addDeclaration(declaration) {
-                var name = getDeclarationName(declaration);
-                if (name) {
-                    var declarations = getDeclarations(name);
-                    declarations.push(declaration);
-                }
-            }
-            function getDeclarations(name) {
-                return ts.getProperty(result, name) || (result[name] = []);
-            }
-            function getDeclarationName(declaration) {
-                if (declaration.name) {
-                    var result_2 = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (result_2 !== undefined) {
-                        return result_2;
-                    }
-                    if (declaration.name.kind === 140) {
-                        var expr = declaration.name.expression;
-                        if (expr.kind === 172) {
-                            return expr.name.text;
-                        }
-                        return getTextOfIdentifierOrLiteral(expr);
-                    }
-                }
-                return undefined;
-            }
-            function getTextOfIdentifierOrLiteral(node) {
-                if (node) {
-                    if (node.kind === 69 ||
-                        node.kind === 9 ||
-                        node.kind === 8) {
-                        return node.text;
-                    }
-                }
-                return undefined;
-            }
-            function visit(node) {
-                switch (node.kind) {
-                    case 220:
-                    case 179:
-                    case 147:
-                    case 146:
-                        var functionDeclaration = node;
-                        var declarationName = getDeclarationName(functionDeclaration);
-                        if (declarationName) {
-                            var declarations = getDeclarations(declarationName);
-                            var lastDeclaration = ts.lastOrUndefined(declarations);
-                            if (lastDeclaration && functionDeclaration.parent === lastDeclaration.parent && functionDeclaration.symbol === lastDeclaration.symbol) {
-                                if (functionDeclaration.body && !lastDeclaration.body) {
-                                    declarations[declarations.length - 1] = functionDeclaration;
-                                }
-                            }
-                            else {
-                                declarations.push(functionDeclaration);
-                            }
-                            ts.forEachChild(node, visit);
-                        }
-                        break;
-                    case 221:
-                    case 192:
-                    case 222:
-                    case 223:
-                    case 224:
-                    case 225:
-                    case 229:
-                    case 238:
-                    case 234:
-                    case 229:
-                    case 231:
-                    case 232:
-                    case 149:
-                    case 150:
-                    case 159:
-                        addDeclaration(node);
-                        ts.forEachChild(node, visit);
-                        break;
-                    case 142:
-                        if (!(node.flags & 92)) {
-                            break;
-                        }
-                    case 218:
-                    case 169: {
-                        var decl = node;
-                        if (ts.isBindingPattern(decl.name)) {
-                            ts.forEachChild(decl.name, visit);
-                            break;
-                        }
-                        if (decl.initializer)
-                            visit(decl.initializer);
-                    }
-                    case 255:
-                    case 145:
-                    case 144:
-                        addDeclaration(node);
-                        break;
-                    case 236:
-                        if (node.exportClause) {
-                            ts.forEach(node.exportClause.elements, visit);
-                        }
-                        break;
-                    case 230:
-                        var importClause = node.importClause;
-                        if (importClause) {
-                            if (importClause.name) {
-                                addDeclaration(importClause);
-                            }
-                            if (importClause.namedBindings) {
-                                if (importClause.namedBindings.kind === 232) {
-                                    addDeclaration(importClause.namedBindings);
-                                }
-                                else {
-                                    ts.forEach(importClause.namedBindings.elements, visit);
-                                }
-                            }
-                        }
-                        break;
-                    default:
-                        ts.forEachChild(node, visit);
-                }
-            }
-        };
-        return SourceFileObject;
-    }(NodeObject));
-    var TextChange = (function () {
-        function TextChange() {
-        }
-        return TextChange;
-    }());
-    ts.TextChange = TextChange;
-    var HighlightSpanKind;
-    (function (HighlightSpanKind) {
-        HighlightSpanKind.none = "none";
-        HighlightSpanKind.definition = "definition";
-        HighlightSpanKind.reference = "reference";
-        HighlightSpanKind.writtenReference = "writtenReference";
-    })(HighlightSpanKind = ts.HighlightSpanKind || (ts.HighlightSpanKind = {}));
-    (function (IndentStyle) {
-        IndentStyle[IndentStyle["None"] = 0] = "None";
-        IndentStyle[IndentStyle["Block"] = 1] = "Block";
-        IndentStyle[IndentStyle["Smart"] = 2] = "Smart";
-    })(ts.IndentStyle || (ts.IndentStyle = {}));
-    var IndentStyle = ts.IndentStyle;
-    (function (SymbolDisplayPartKind) {
-        SymbolDisplayPartKind[SymbolDisplayPartKind["aliasName"] = 0] = "aliasName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["className"] = 1] = "className";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["enumName"] = 2] = "enumName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["fieldName"] = 3] = "fieldName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["interfaceName"] = 4] = "interfaceName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["keyword"] = 5] = "keyword";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["lineBreak"] = 6] = "lineBreak";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["numericLiteral"] = 7] = "numericLiteral";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["stringLiteral"] = 8] = "stringLiteral";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["localName"] = 9] = "localName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["methodName"] = 10] = "methodName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["moduleName"] = 11] = "moduleName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["operator"] = 12] = "operator";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["parameterName"] = 13] = "parameterName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["propertyName"] = 14] = "propertyName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["punctuation"] = 15] = "punctuation";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["space"] = 16] = "space";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["text"] = 17] = "text";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["typeParameterName"] = 18] = "typeParameterName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["enumMemberName"] = 19] = "enumMemberName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["functionName"] = 20] = "functionName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["regularExpressionLiteral"] = 21] = "regularExpressionLiteral";
-    })(ts.SymbolDisplayPartKind || (ts.SymbolDisplayPartKind = {}));
-    var SymbolDisplayPartKind = ts.SymbolDisplayPartKind;
-    (function (TokenClass) {
-        TokenClass[TokenClass["Punctuation"] = 0] = "Punctuation";
-        TokenClass[TokenClass["Keyword"] = 1] = "Keyword";
-        TokenClass[TokenClass["Operator"] = 2] = "Operator";
-        TokenClass[TokenClass["Comment"] = 3] = "Comment";
-        TokenClass[TokenClass["Whitespace"] = 4] = "Whitespace";
-        TokenClass[TokenClass["Identifier"] = 5] = "Identifier";
-        TokenClass[TokenClass["NumberLiteral"] = 6] = "NumberLiteral";
-        TokenClass[TokenClass["StringLiteral"] = 7] = "StringLiteral";
-        TokenClass[TokenClass["RegExpLiteral"] = 8] = "RegExpLiteral";
-    })(ts.TokenClass || (ts.TokenClass = {}));
-    var TokenClass = ts.TokenClass;
-    var ScriptElementKind;
-    (function (ScriptElementKind) {
-        ScriptElementKind.unknown = "";
-        ScriptElementKind.warning = "warning";
-        ScriptElementKind.keyword = "keyword";
-        ScriptElementKind.scriptElement = "script";
-        ScriptElementKind.moduleElement = "module";
-        ScriptElementKind.classElement = "class";
-        ScriptElementKind.localClassElement = "local class";
-        ScriptElementKind.interfaceElement = "interface";
-        ScriptElementKind.typeElement = "type";
-        ScriptElementKind.enumElement = "enum";
-        ScriptElementKind.variableElement = "var";
-        ScriptElementKind.localVariableElement = "local var";
-        ScriptElementKind.functionElement = "function";
-        ScriptElementKind.localFunctionElement = "local function";
-        ScriptElementKind.memberFunctionElement = "method";
-        ScriptElementKind.memberGetAccessorElement = "getter";
-        ScriptElementKind.memberSetAccessorElement = "setter";
-        ScriptElementKind.memberVariableElement = "property";
-        ScriptElementKind.constructorImplementationElement = "constructor";
-        ScriptElementKind.callSignatureElement = "call";
-        ScriptElementKind.indexSignatureElement = "index";
-        ScriptElementKind.constructSignatureElement = "construct";
-        ScriptElementKind.parameterElement = "parameter";
-        ScriptElementKind.typeParameterElement = "type parameter";
-        ScriptElementKind.primitiveType = "primitive type";
-        ScriptElementKind.label = "label";
-        ScriptElementKind.alias = "alias";
-        ScriptElementKind.constElement = "const";
-        ScriptElementKind.letElement = "let";
-    })(ScriptElementKind = ts.ScriptElementKind || (ts.ScriptElementKind = {}));
-    var ScriptElementKindModifier;
-    (function (ScriptElementKindModifier) {
-        ScriptElementKindModifier.none = "";
-        ScriptElementKindModifier.publicMemberModifier = "public";
-        ScriptElementKindModifier.privateMemberModifier = "private";
-        ScriptElementKindModifier.protectedMemberModifier = "protected";
-        ScriptElementKindModifier.exportedModifier = "export";
-        ScriptElementKindModifier.ambientModifier = "declare";
-        ScriptElementKindModifier.staticModifier = "static";
-        ScriptElementKindModifier.abstractModifier = "abstract";
-    })(ScriptElementKindModifier = ts.ScriptElementKindModifier || (ts.ScriptElementKindModifier = {}));
-    var ClassificationTypeNames = (function () {
-        function ClassificationTypeNames() {
-        }
-        ClassificationTypeNames.comment = "comment";
-        ClassificationTypeNames.identifier = "identifier";
-        ClassificationTypeNames.keyword = "keyword";
-        ClassificationTypeNames.numericLiteral = "number";
-        ClassificationTypeNames.operator = "operator";
-        ClassificationTypeNames.stringLiteral = "string";
-        ClassificationTypeNames.whiteSpace = "whitespace";
-        ClassificationTypeNames.text = "text";
-        ClassificationTypeNames.punctuation = "punctuation";
-        ClassificationTypeNames.className = "class name";
-        ClassificationTypeNames.enumName = "enum name";
-        ClassificationTypeNames.interfaceName = "interface name";
-        ClassificationTypeNames.moduleName = "module name";
-        ClassificationTypeNames.typeParameterName = "type parameter name";
-        ClassificationTypeNames.typeAliasName = "type alias name";
-        ClassificationTypeNames.parameterName = "parameter name";
-        ClassificationTypeNames.docCommentTagName = "doc comment tag name";
-        ClassificationTypeNames.jsxOpenTagName = "jsx open tag name";
-        ClassificationTypeNames.jsxCloseTagName = "jsx close tag name";
-        ClassificationTypeNames.jsxSelfClosingTagName = "jsx self closing tag name";
-        ClassificationTypeNames.jsxAttribute = "jsx attribute";
-        ClassificationTypeNames.jsxText = "jsx text";
-        ClassificationTypeNames.jsxAttributeStringLiteralValue = "jsx attribute string literal value";
-        return ClassificationTypeNames;
-    }());
-    ts.ClassificationTypeNames = ClassificationTypeNames;
-    function displayPartsToString(displayParts) {
-        if (displayParts) {
-            return ts.map(displayParts, function (displayPart) { return displayPart.text; }).join("");
-        }
-        return "";
-    }
-    ts.displayPartsToString = displayPartsToString;
-    function isLocalVariableOrFunction(symbol) {
-        if (symbol.parent) {
-            return false;
-        }
-        return ts.forEach(symbol.declarations, function (declaration) {
-            if (declaration.kind === 179) {
-                return true;
-            }
-            if (declaration.kind !== 218 && declaration.kind !== 220) {
-                return false;
-            }
-            for (var parent_15 = declaration.parent; !ts.isFunctionBlock(parent_15); parent_15 = parent_15.parent) {
-                if (parent_15.kind === 256 || parent_15.kind === 226) {
-                    return false;
-                }
-            }
-            return true;
-        });
-    }
-    function getDefaultCompilerOptions() {
-        return {
-            target: 1,
-            jsx: 1
-        };
-    }
-    ts.getDefaultCompilerOptions = getDefaultCompilerOptions;
-    var HostCache = (function () {
-        function HostCache(host, getCanonicalFileName) {
-            this.host = host;
-            this.getCanonicalFileName = getCanonicalFileName;
-            this.currentDirectory = host.getCurrentDirectory();
-            this.fileNameToEntry = ts.createFileMap();
-            var rootFileNames = host.getScriptFileNames();
-            for (var _i = 0, rootFileNames_1 = rootFileNames; _i < rootFileNames_1.length; _i++) {
-                var fileName = rootFileNames_1[_i];
-                this.createEntry(fileName, ts.toPath(fileName, this.currentDirectory, getCanonicalFileName));
-            }
-            this._compilationSettings = host.getCompilationSettings() || getDefaultCompilerOptions();
-        }
-        HostCache.prototype.compilationSettings = function () {
-            return this._compilationSettings;
-        };
-        HostCache.prototype.createEntry = function (fileName, path) {
-            var entry;
-            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
-            if (scriptSnapshot) {
-                entry = {
-                    hostFileName: fileName,
-                    version: this.host.getScriptVersion(fileName),
-                    scriptSnapshot: scriptSnapshot,
-                    scriptKind: ts.getScriptKind(fileName, this.host)
-                };
-            }
-            this.fileNameToEntry.set(path, entry);
-            return entry;
-        };
-        HostCache.prototype.getEntry = function (path) {
-            return this.fileNameToEntry.get(path);
-        };
-        HostCache.prototype.contains = function (path) {
-            return this.fileNameToEntry.contains(path);
-        };
-        HostCache.prototype.getOrCreateEntry = function (fileName) {
-            var path = ts.toPath(fileName, this.currentDirectory, this.getCanonicalFileName);
-            return this.getOrCreateEntryByPath(fileName, path);
-        };
-        HostCache.prototype.getOrCreateEntryByPath = function (fileName, path) {
-            return this.contains(path)
-                ? this.getEntry(path)
-                : this.createEntry(fileName, path);
-        };
-        HostCache.prototype.getRootFileNames = function () {
-            var fileNames = [];
-            this.fileNameToEntry.forEachValue(function (path, value) {
-                if (value) {
-                    fileNames.push(value.hostFileName);
-                }
-            });
-            return fileNames;
-        };
-        HostCache.prototype.getVersion = function (path) {
-            var file = this.getEntry(path);
-            return file && file.version;
-        };
-        HostCache.prototype.getScriptSnapshot = function (path) {
-            var file = this.getEntry(path);
-            return file && file.scriptSnapshot;
-        };
-        return HostCache;
-    }());
-    var SyntaxTreeCache = (function () {
-        function SyntaxTreeCache(host) {
-            this.host = host;
-        }
-        SyntaxTreeCache.prototype.getCurrentSourceFile = function (fileName) {
-            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
-            if (!scriptSnapshot) {
-                throw new Error("Could not find file: '" + fileName + "'.");
-            }
-            var scriptKind = ts.getScriptKind(fileName, this.host);
-            var version = this.host.getScriptVersion(fileName);
-            var sourceFile;
-            if (this.currentFileName !== fileName) {
-                sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, 2, version, true, scriptKind);
-            }
-            else if (this.currentFileVersion !== version) {
-                var editRange = scriptSnapshot.getChangeRange(this.currentFileScriptSnapshot);
-                sourceFile = updateLanguageServiceSourceFile(this.currentSourceFile, scriptSnapshot, version, editRange);
-            }
-            if (sourceFile) {
-                this.currentFileVersion = version;
-                this.currentFileName = fileName;
-                this.currentFileScriptSnapshot = scriptSnapshot;
-                this.currentSourceFile = sourceFile;
-            }
-            return this.currentSourceFile;
-        };
-        return SyntaxTreeCache;
-    }());
-    function setSourceFileFields(sourceFile, scriptSnapshot, version) {
-        sourceFile.version = version;
-        sourceFile.scriptSnapshot = scriptSnapshot;
-    }
-    function transpileModule(input, transpileOptions) {
-        var options = transpileOptions.compilerOptions ? ts.clone(transpileOptions.compilerOptions) : getDefaultCompilerOptions();
-        options.isolatedModules = true;
-        options.suppressOutputPathCheck = true;
-        options.allowNonTsExtensions = true;
-        options.noLib = true;
-        options.noResolve = true;
-        var inputFileName = transpileOptions.fileName || (options.jsx ? "module.tsx" : "module.ts");
-        var sourceFile = ts.createSourceFile(inputFileName, input, options.target);
-        if (transpileOptions.moduleName) {
-            sourceFile.moduleName = transpileOptions.moduleName;
-        }
-        sourceFile.renamedDependencies = transpileOptions.renamedDependencies;
-        var newLine = ts.getNewLineCharacter(options);
-        var outputText;
-        var sourceMapText;
-        var compilerHost = {
-            getSourceFile: function (fileName, target) { return fileName === ts.normalizePath(inputFileName) ? sourceFile : undefined; },
-            writeFile: function (name, text, writeByteOrderMark) {
-                if (ts.fileExtensionIs(name, ".map")) {
-                    ts.Debug.assert(sourceMapText === undefined, "Unexpected multiple source map outputs for the file '" + name + "'");
-                    sourceMapText = text;
-                }
-                else {
-                    ts.Debug.assert(outputText === undefined, "Unexpected multiple outputs for the file: '" + name + "'");
-                    outputText = text;
-                }
-            },
-            getDefaultLibFileName: function () { return "lib.d.ts"; },
-            useCaseSensitiveFileNames: function () { return false; },
-            getCanonicalFileName: function (fileName) { return fileName; },
-            getCurrentDirectory: function () { return ""; },
-            getNewLine: function () { return newLine; },
-            fileExists: function (fileName) { return fileName === inputFileName; },
-            readFile: function (fileName) { return ""; },
-            directoryExists: function (directoryExists) { return true; }
-        };
-        var program = ts.createProgram([inputFileName], options, compilerHost);
-        var diagnostics;
-        if (transpileOptions.reportDiagnostics) {
-            diagnostics = [];
-            ts.addRange(diagnostics, program.getSyntacticDiagnostics(sourceFile));
-            ts.addRange(diagnostics, program.getOptionsDiagnostics());
-        }
-        program.emit();
-        ts.Debug.assert(outputText !== undefined, "Output generation failed");
-        return { outputText: outputText, diagnostics: diagnostics, sourceMapText: sourceMapText };
-    }
-    ts.transpileModule = transpileModule;
-    function transpile(input, compilerOptions, fileName, diagnostics, moduleName) {
-        var output = transpileModule(input, { compilerOptions: compilerOptions, fileName: fileName, reportDiagnostics: !!diagnostics, moduleName: moduleName });
-        ts.addRange(diagnostics, output.diagnostics);
-        return output.outputText;
-    }
-    ts.transpile = transpile;
-    function createLanguageServiceSourceFile(fileName, scriptSnapshot, scriptTarget, version, setNodeParents, scriptKind) {
-        var text = scriptSnapshot.getText(0, scriptSnapshot.getLength());
-        var sourceFile = ts.createSourceFile(fileName, text, scriptTarget, setNodeParents, scriptKind);
-        setSourceFileFields(sourceFile, scriptSnapshot, version);
-        return sourceFile;
-    }
-    ts.createLanguageServiceSourceFile = createLanguageServiceSourceFile;
-    ts.disableIncrementalParsing = false;
-    function updateLanguageServiceSourceFile(sourceFile, scriptSnapshot, version, textChangeRange, aggressiveChecks) {
-        if (textChangeRange) {
-            if (version !== sourceFile.version) {
-                if (!ts.disableIncrementalParsing) {
-                    var newText = void 0;
-                    var prefix = textChangeRange.span.start !== 0
-                        ? sourceFile.text.substr(0, textChangeRange.span.start)
-                        : "";
-                    var suffix = ts.textSpanEnd(textChangeRange.span) !== sourceFile.text.length
-                        ? sourceFile.text.substr(ts.textSpanEnd(textChangeRange.span))
-                        : "";
-                    if (textChangeRange.newLength === 0) {
-                        newText = prefix && suffix ? prefix + suffix : prefix || suffix;
-                    }
-                    else {
-                        var changedText = scriptSnapshot.getText(textChangeRange.span.start, textChangeRange.span.start + textChangeRange.newLength);
-                        newText = prefix && suffix
-                            ? prefix + changedText + suffix
-                            : prefix
-                                ? (prefix + changedText)
-                                : (changedText + suffix);
-                    }
-                    var newSourceFile = ts.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
-                    setSourceFileFields(newSourceFile, scriptSnapshot, version);
-                    newSourceFile.nameTable = undefined;
-                    if (sourceFile !== newSourceFile && sourceFile.scriptSnapshot) {
-                        if (sourceFile.scriptSnapshot.dispose) {
-                            sourceFile.scriptSnapshot.dispose();
-                        }
-                        sourceFile.scriptSnapshot = undefined;
-                    }
-                    return newSourceFile;
-                }
-            }
-        }
-        return createLanguageServiceSourceFile(sourceFile.fileName, scriptSnapshot, sourceFile.languageVersion, version, true, sourceFile.scriptKind);
-    }
-    ts.updateLanguageServiceSourceFile = updateLanguageServiceSourceFile;
-    function createDocumentRegistry(useCaseSensitiveFileNames, currentDirectory) {
-        if (currentDirectory === void 0) { currentDirectory = ""; }
-        var buckets = {};
-        var getCanonicalFileName = ts.createGetCanonicalFileName(!!useCaseSensitiveFileNames);
-        function getKeyForCompilationSettings(settings) {
-            return ("_" + settings.target + "|" + settings.module + "|" + settings.noResolve + "|" + settings.jsx + "|" + settings.allowJs + "|" + settings.baseUrl + "|" + settings.typesRoot + "|" + settings.typesSearchPaths + "|" + JSON.stringify(settings.rootDirs) + "|" + JSON.stringify(settings.paths));
-        }
-        function getBucketForCompilationSettings(key, createIfMissing) {
-            var bucket = ts.lookUp(buckets, key);
-            if (!bucket && createIfMissing) {
-                buckets[key] = bucket = ts.createFileMap();
-            }
-            return bucket;
-        }
-        function reportStats() {
-            var bucketInfoArray = Object.keys(buckets).filter(function (name) { return name && name.charAt(0) === "_"; }).map(function (name) {
-                var entries = ts.lookUp(buckets, name);
-                var sourceFiles = [];
-                entries.forEachValue(function (key, entry) {
-                    sourceFiles.push({
-                        name: key,
-                        refCount: entry.languageServiceRefCount,
-                        references: entry.owners.slice(0)
-                    });
-                });
-                sourceFiles.sort(function (x, y) { return y.refCount - x.refCount; });
-                return {
-                    bucket: name,
-                    sourceFiles: sourceFiles
-                };
-            });
-            return JSON.stringify(bucketInfoArray, undefined, 2);
-        }
-        function acquireDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
-        }
-        function acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
-            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, true, scriptKind);
-        }
-        function updateDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
-        }
-        function updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
-            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, false, scriptKind);
-        }
-        function acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, acquiring, scriptKind) {
-            var bucket = getBucketForCompilationSettings(key, true);
-            var entry = bucket.get(path);
-            if (!entry) {
-                ts.Debug.assert(acquiring, "How could we be trying to update a document that the registry doesn't have?");
-                var sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, compilationSettings.target, version, false, scriptKind);
-                entry = {
-                    sourceFile: sourceFile,
-                    languageServiceRefCount: 0,
-                    owners: []
-                };
-                bucket.set(path, entry);
-            }
-            else {
-                if (entry.sourceFile.version !== version) {
-                    entry.sourceFile = updateLanguageServiceSourceFile(entry.sourceFile, scriptSnapshot, version, scriptSnapshot.getChangeRange(entry.sourceFile.scriptSnapshot));
-                }
-            }
-            if (acquiring) {
-                entry.languageServiceRefCount++;
-            }
-            return entry.sourceFile;
-        }
-        function releaseDocument(fileName, compilationSettings) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return releaseDocumentWithKey(path, key);
-        }
-        function releaseDocumentWithKey(path, key) {
-            var bucket = getBucketForCompilationSettings(key, false);
-            ts.Debug.assert(bucket !== undefined);
-            var entry = bucket.get(path);
-            entry.languageServiceRefCount--;
-            ts.Debug.assert(entry.languageServiceRefCount >= 0);
-            if (entry.languageServiceRefCount === 0) {
-                bucket.remove(path);
-            }
-        }
-        return {
-            acquireDocument: acquireDocument,
-            acquireDocumentWithKey: acquireDocumentWithKey,
-            updateDocument: updateDocument,
-            updateDocumentWithKey: updateDocumentWithKey,
-            releaseDocument: releaseDocument,
-            releaseDocumentWithKey: releaseDocumentWithKey,
-            reportStats: reportStats,
-            getKeyForCompilationSettings: getKeyForCompilationSettings
-        };
-    }
-    ts.createDocumentRegistry = createDocumentRegistry;
-    function preProcessFile(sourceText, readImportFiles, detectJavaScriptImports) {
-        if (readImportFiles === void 0) { readImportFiles = true; }
-        if (detectJavaScriptImports === void 0) { detectJavaScriptImports = false; }
-        var referencedFiles = [];
-        var typeReferenceDirectives = [];
-        var importedFiles = [];
-        var ambientExternalModules;
-        var isNoDefaultLib = false;
-        var braceNesting = 0;
-        var externalModule = false;
-        function nextToken() {
-            var token = scanner.scan();
-            if (token === 15) {
-                braceNesting++;
-            }
-            else if (token === 16) {
-                braceNesting--;
-            }
-            return token;
-        }
-        function processTripleSlashDirectives() {
-            var commentRanges = ts.getLeadingCommentRanges(sourceText, 0);
-            ts.forEach(commentRanges, function (commentRange) {
-                var comment = sourceText.substring(commentRange.pos, commentRange.end);
-                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, commentRange);
-                if (referencePathMatchResult) {
-                    isNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
-                    var fileReference = referencePathMatchResult.fileReference;
-                    if (fileReference) {
-                        var collection = referencePathMatchResult.isTypeReferenceDirective
-                            ? typeReferenceDirectives
-                            : referencedFiles;
-                        collection.push(fileReference);
-                    }
-                }
-            });
-        }
-        function getFileReference() {
-            var file = scanner.getTokenValue();
-            var pos = scanner.getTokenPos();
-            return {
-                fileName: file,
-                pos: pos,
-                end: pos + file.length
-            };
-        }
-        function recordAmbientExternalModule() {
-            if (!ambientExternalModules) {
-                ambientExternalModules = [];
-            }
-            ambientExternalModules.push({ ref: getFileReference(), depth: braceNesting });
-        }
-        function recordModuleName() {
-            importedFiles.push(getFileReference());
-            markAsExternalModuleIfTopLevel();
-        }
-        function markAsExternalModuleIfTopLevel() {
-            if (braceNesting === 0) {
-                externalModule = true;
-            }
-        }
-        function tryConsumeDeclare() {
-            var token = scanner.getToken();
-            if (token === 122) {
-                token = nextToken();
-                if (token === 125) {
-                    token = nextToken();
-                    if (token === 9) {
-                        recordAmbientExternalModule();
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeImport() {
-            var token = scanner.getToken();
-            if (token === 89) {
-                token = nextToken();
-                if (token === 9) {
-                    recordModuleName();
-                    return true;
-                }
-                else {
-                    if (token === 69 || ts.isKeyword(token)) {
-                        token = nextToken();
-                        if (token === 136) {
-                            token = nextToken();
-                            if (token === 9) {
-                                recordModuleName();
-                                return true;
-                            }
-                        }
-                        else if (token === 56) {
-                            if (tryConsumeRequireCall(true)) {
-                                return true;
-                            }
-                        }
-                        else if (token === 24) {
-                            token = nextToken();
-                        }
-                        else {
-                            return true;
-                        }
-                    }
-                    if (token === 15) {
-                        token = nextToken();
-                        while (token !== 16 && token !== 1) {
-                            token = nextToken();
-                        }
-                        if (token === 16) {
-                            token = nextToken();
-                            if (token === 136) {
-                                token = nextToken();
-                                if (token === 9) {
-                                    recordModuleName();
-                                }
-                            }
-                        }
-                    }
-                    else if (token === 37) {
-                        token = nextToken();
-                        if (token === 116) {
-                            token = nextToken();
-                            if (token === 69 || ts.isKeyword(token)) {
-                                token = nextToken();
-                                if (token === 136) {
-                                    token = nextToken();
-                                    if (token === 9) {
-                                        recordModuleName();
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeExport() {
-            var token = scanner.getToken();
-            if (token === 82) {
-                markAsExternalModuleIfTopLevel();
-                token = nextToken();
-                if (token === 15) {
-                    token = nextToken();
-                    while (token !== 16 && token !== 1) {
-                        token = nextToken();
-                    }
-                    if (token === 16) {
-                        token = nextToken();
-                        if (token === 136) {
-                            token = nextToken();
-                            if (token === 9) {
-                                recordModuleName();
-                            }
-                        }
-                    }
-                }
-                else if (token === 37) {
-                    token = nextToken();
-                    if (token === 136) {
-                        token = nextToken();
-                        if (token === 9) {
-                            recordModuleName();
-                        }
-                    }
-                }
-                else if (token === 89) {
-                    token = nextToken();
-                    if (token === 69 || ts.isKeyword(token)) {
-                        token = nextToken();
-                        if (token === 56) {
-                            if (tryConsumeRequireCall(true)) {
-                                return true;
-                            }
-                        }
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeRequireCall(skipCurrentToken) {
-            var token = skipCurrentToken ? nextToken() : scanner.getToken();
-            if (token === 129) {
-                token = nextToken();
-                if (token === 17) {
-                    token = nextToken();
-                    if (token === 9) {
-                        recordModuleName();
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeDefine() {
-            var token = scanner.getToken();
-            if (token === 69 && scanner.getTokenValue() === "define") {
-                token = nextToken();
-                if (token !== 17) {
-                    return true;
-                }
-                token = nextToken();
-                if (token === 9) {
-                    token = nextToken();
-                    if (token === 24) {
-                        token = nextToken();
-                    }
-                    else {
-                        return true;
-                    }
-                }
-                if (token !== 19) {
-                    return true;
-                }
-                token = nextToken();
-                var i = 0;
-                while (token !== 20 && token !== 1) {
-                    if (token === 9) {
-                        recordModuleName();
-                        i++;
-                    }
-                    token = nextToken();
-                }
-                return true;
-            }
-            return false;
-        }
-        function processImports() {
-            scanner.setText(sourceText);
-            nextToken();
-            while (true) {
-                if (scanner.getToken() === 1) {
-                    break;
-                }
-                if (tryConsumeDeclare() ||
-                    tryConsumeImport() ||
-                    tryConsumeExport() ||
-                    (detectJavaScriptImports && (tryConsumeRequireCall(false) || tryConsumeDefine()))) {
-                    continue;
-                }
-                else {
-                    nextToken();
-                }
-            }
-            scanner.setText(undefined);
-        }
-        if (readImportFiles) {
-            processImports();
-        }
-        processTripleSlashDirectives();
-        if (externalModule) {
-            if (ambientExternalModules) {
-                for (var _i = 0, ambientExternalModules_1 = ambientExternalModules; _i < ambientExternalModules_1.length; _i++) {
-                    var decl = ambientExternalModules_1[_i];
-                    importedFiles.push(decl.ref);
-                }
-            }
-            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: undefined };
-        }
-        else {
-            var ambientModuleNames = void 0;
-            if (ambientExternalModules) {
-                for (var _a = 0, ambientExternalModules_2 = ambientExternalModules; _a < ambientExternalModules_2.length; _a++) {
-                    var decl = ambientExternalModules_2[_a];
-                    if (decl.depth === 0) {
-                        if (!ambientModuleNames) {
-                            ambientModuleNames = [];
-                        }
-                        ambientModuleNames.push(decl.ref.fileName);
-                    }
-                    else {
-                        importedFiles.push(decl.ref);
-                    }
-                }
-            }
-            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: ambientModuleNames };
-        }
-    }
-    ts.preProcessFile = preProcessFile;
-    function getTargetLabel(referenceNode, labelName) {
-        while (referenceNode) {
-            if (referenceNode.kind === 214 && referenceNode.label.text === labelName) {
-                return referenceNode.label;
-            }
-            referenceNode = referenceNode.parent;
-        }
-        return undefined;
-    }
-    function isJumpStatementTarget(node) {
-        return node.kind === 69 &&
-            (node.parent.kind === 210 || node.parent.kind === 209) &&
-            node.parent.label === node;
-    }
-    function isLabelOfLabeledStatement(node) {
-        return node.kind === 69 &&
-            node.parent.kind === 214 &&
-            node.parent.label === node;
-    }
-    function isLabeledBy(node, labelName) {
-        for (var owner = node.parent; owner.kind === 214; owner = owner.parent) {
-            if (owner.label.text === labelName) {
-                return true;
-            }
-        }
-        return false;
-    }
-    function isLabelName(node) {
-        return isLabelOfLabeledStatement(node) || isJumpStatementTarget(node);
-    }
-    function isRightSideOfQualifiedName(node) {
-        return node.parent.kind === 139 && node.parent.right === node;
-    }
-    function isRightSideOfPropertyAccess(node) {
-        return node && node.parent && node.parent.kind === 172 && node.parent.name === node;
-    }
-    function isCallExpressionTarget(node) {
-        if (isRightSideOfPropertyAccess(node)) {
-            node = node.parent;
-        }
-        return node && node.parent && node.parent.kind === 174 && node.parent.expression === node;
-    }
-    function isNewExpressionTarget(node) {
-        if (isRightSideOfPropertyAccess(node)) {
-            node = node.parent;
-        }
-        return node && node.parent && node.parent.kind === 175 && node.parent.expression === node;
-    }
-    function isNameOfModuleDeclaration(node) {
-        return node.parent.kind === 225 && node.parent.name === node;
-    }
-    function isNameOfFunctionDeclaration(node) {
-        return node.kind === 69 &&
-            ts.isFunctionLike(node.parent) && node.parent.name === node;
-    }
-    function isObjectLiteralPropertyDeclaration(node) {
-        switch (node.kind) {
-            case 253:
-            case 254:
-            case 147:
-            case 149:
-            case 150:
-                return true;
-        }
-        return false;
-    }
-    function getContainingObjectLiteralElement(node) {
-        switch (node.kind) {
-            case 9:
-            case 8:
-                if (node.parent.kind === 140) {
-                    return isObjectLiteralPropertyDeclaration(node.parent.parent) ? node.parent.parent : undefined;
-                }
-            case 69:
-                return isObjectLiteralPropertyDeclaration(node.parent) && node.parent.name === node ? node.parent : undefined;
-        }
-        return undefined;
-    }
-    function isLiteralNameOfPropertyDeclarationOrIndexAccess(node) {
-        if (node.kind === 9 || node.kind === 8) {
-            switch (node.parent.kind) {
-                case 145:
-                case 144:
-                case 253:
-                case 255:
-                case 147:
-                case 146:
-                case 149:
-                case 150:
-                case 225:
-                    return node.parent.name === node;
-                case 173:
-                    return node.parent.argumentExpression === node;
-                case 140:
-                    return true;
-            }
-        }
-        return false;
-    }
-    function isNameOfExternalModuleImportOrDeclaration(node) {
-        if (node.kind === 9) {
-            return isNameOfModuleDeclaration(node) ||
-                (ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) && ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node);
-        }
-        return false;
-    }
-    function isInsideComment(sourceFile, token, position) {
-        return position <= token.getStart(sourceFile) &&
-            (isInsideCommentRange(ts.getTrailingCommentRanges(sourceFile.text, token.getFullStart())) ||
-                isInsideCommentRange(ts.getLeadingCommentRanges(sourceFile.text, token.getFullStart())));
-        function isInsideCommentRange(comments) {
-            return ts.forEach(comments, function (comment) {
-                if (comment.pos < position && position < comment.end) {
-                    return true;
-                }
-                else if (position === comment.end) {
-                    var text = sourceFile.text;
-                    var width = comment.end - comment.pos;
-                    if (width <= 2 || text.charCodeAt(comment.pos + 1) === 47) {
-                        return true;
-                    }
-                    else {
-                        return !(text.charCodeAt(comment.end - 1) === 47 &&
-                            text.charCodeAt(comment.end - 2) === 42);
-                    }
-                }
-                return false;
-            });
-        }
-    }
-    var keywordCompletions = [];
-    for (var i = 70; i <= 138; i++) {
-        keywordCompletions.push({
-            name: ts.tokenToString(i),
-            kind: ScriptElementKind.keyword,
-            kindModifiers: ScriptElementKindModifier.none,
-            sortText: "0"
-        });
-    }
-    function getContainerNode(node) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return undefined;
-            }
-            switch (node.kind) {
-                case 256:
-                case 147:
-                case 146:
-                case 220:
-                case 179:
-                case 149:
-                case 150:
-                case 221:
-                case 222:
-                case 224:
-                case 225:
-                    return node;
-            }
-        }
-    }
-    ts.getContainerNode = getContainerNode;
-    function getNodeKind(node) {
-        switch (node.kind) {
-            case 225: return ScriptElementKind.moduleElement;
-            case 221:
-            case 192:
-                return ScriptElementKind.classElement;
-            case 222: return ScriptElementKind.interfaceElement;
-            case 223: return ScriptElementKind.typeElement;
-            case 224: return ScriptElementKind.enumElement;
-            case 218:
-                return ts.isConst(node)
-                    ? ScriptElementKind.constElement
-                    : ts.isLet(node)
-                        ? ScriptElementKind.letElement
-                        : ScriptElementKind.variableElement;
-            case 220:
-            case 179:
-                return ScriptElementKind.functionElement;
-            case 149: return ScriptElementKind.memberGetAccessorElement;
-            case 150: return ScriptElementKind.memberSetAccessorElement;
-            case 147:
-            case 146:
-                return ScriptElementKind.memberFunctionElement;
-            case 145:
-            case 144:
-                return ScriptElementKind.memberVariableElement;
-            case 153: return ScriptElementKind.indexSignatureElement;
-            case 152: return ScriptElementKind.constructSignatureElement;
-            case 151: return ScriptElementKind.callSignatureElement;
-            case 148: return ScriptElementKind.constructorImplementationElement;
-            case 141: return ScriptElementKind.typeParameterElement;
-            case 255: return ScriptElementKind.variableElement;
-            case 142: return (node.flags & 92) ? ScriptElementKind.memberVariableElement : ScriptElementKind.parameterElement;
-            case 229:
-            case 234:
-            case 231:
-            case 238:
-            case 232:
-                return ScriptElementKind.alias;
-        }
-        return ScriptElementKind.unknown;
-    }
-    ts.getNodeKind = getNodeKind;
-    var CancellationTokenObject = (function () {
-        function CancellationTokenObject(cancellationToken) {
-            this.cancellationToken = cancellationToken;
-        }
-        CancellationTokenObject.prototype.isCancellationRequested = function () {
-            return this.cancellationToken && this.cancellationToken.isCancellationRequested();
-        };
-        CancellationTokenObject.prototype.throwIfCancellationRequested = function () {
-            if (this.isCancellationRequested()) {
-                throw new ts.OperationCanceledException();
-            }
-        };
-        return CancellationTokenObject;
-    }());
-    function createLanguageService(host, documentRegistry) {
-        if (documentRegistry === void 0) { documentRegistry = createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory()); }
-        var syntaxTreeCache = new SyntaxTreeCache(host);
-        var ruleProvider;
-        var program;
-        var lastProjectVersion;
-        var useCaseSensitivefileNames = false;
-        var cancellationToken = new CancellationTokenObject(host.getCancellationToken && host.getCancellationToken());
-        var currentDirectory = host.getCurrentDirectory();
-        if (!ts.localizedDiagnosticMessages && host.getLocalizedDiagnosticMessages) {
-            ts.localizedDiagnosticMessages = host.getLocalizedDiagnosticMessages();
-        }
-        function log(message) {
-            if (host.log) {
-                host.log(message);
-            }
-        }
-        var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitivefileNames);
-        function getValidSourceFile(fileName) {
-            var sourceFile = program.getSourceFile(fileName);
-            if (!sourceFile) {
-                throw new Error("Could not find file: '" + fileName + "'.");
-            }
-            return sourceFile;
-        }
-        function getRuleProvider(options) {
-            if (!ruleProvider) {
-                ruleProvider = new ts.formatting.RulesProvider();
-            }
-            ruleProvider.ensureUpToDate(options);
-            return ruleProvider;
-        }
-        function synchronizeHostData() {
-            if (host.getProjectVersion) {
-                var hostProjectVersion = host.getProjectVersion();
-                if (hostProjectVersion) {
-                    if (lastProjectVersion === hostProjectVersion) {
-                        return;
-                    }
-                    lastProjectVersion = hostProjectVersion;
-                }
-            }
-            var hostCache = new HostCache(host, getCanonicalFileName);
-            if (programUpToDate()) {
-                return;
-            }
-            var oldSettings = program && program.getCompilerOptions();
-            var newSettings = hostCache.compilationSettings();
-            var changesInCompilationSettingsAffectSyntax = oldSettings &&
-                (oldSettings.target !== newSettings.target ||
-                    oldSettings.module !== newSettings.module ||
-                    oldSettings.noResolve !== newSettings.noResolve ||
-                    oldSettings.jsx !== newSettings.jsx ||
-                    oldSettings.allowJs !== newSettings.allowJs);
-            var compilerHost = {
-                getSourceFile: getOrCreateSourceFile,
-                getSourceFileByPath: getOrCreateSourceFileByPath,
-                getCancellationToken: function () { return cancellationToken; },
-                getCanonicalFileName: getCanonicalFileName,
-                useCaseSensitiveFileNames: function () { return useCaseSensitivefileNames; },
-                getNewLine: function () { return ts.getNewLineOrDefaultFromHost(host); },
-                getDefaultLibFileName: function (options) { return host.getDefaultLibFileName(options); },
-                writeFile: function (fileName, data, writeByteOrderMark) { },
-                getCurrentDirectory: function () { return currentDirectory; },
-                fileExists: function (fileName) {
-                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
-                    return hostCache.getOrCreateEntry(fileName) !== undefined;
-                },
-                readFile: function (fileName) {
-                    var entry = hostCache.getOrCreateEntry(fileName);
-                    return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
-                },
-                directoryExists: function (directoryName) {
-                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
-                    return ts.directoryProbablyExists(directoryName, host);
-                }
-            };
-            if (host.trace) {
-                compilerHost.trace = function (message) { return host.trace(message); };
-            }
-            if (host.resolveModuleNames) {
-                compilerHost.resolveModuleNames = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
-            }
-            if (host.resolveTypeReferenceDirectives) {
-                compilerHost.resolveTypeReferenceDirectives = function (typeReferenceDirectiveNames, containingFile) {
-                    return host.resolveTypeReferenceDirectives(typeReferenceDirectiveNames, containingFile);
-                };
-            }
-            var documentRegistryBucketKey = documentRegistry.getKeyForCompilationSettings(newSettings);
-            var newProgram = ts.createProgram(hostCache.getRootFileNames(), newSettings, compilerHost, program);
-            if (program) {
-                var oldSourceFiles = program.getSourceFiles();
-                var oldSettingsKey = documentRegistry.getKeyForCompilationSettings(oldSettings);
-                for (var _i = 0, oldSourceFiles_1 = oldSourceFiles; _i < oldSourceFiles_1.length; _i++) {
-                    var oldSourceFile = oldSourceFiles_1[_i];
-                    if (!newProgram.getSourceFile(oldSourceFile.fileName) || changesInCompilationSettingsAffectSyntax) {
-                        documentRegistry.releaseDocumentWithKey(oldSourceFile.path, oldSettingsKey);
-                    }
-                }
-            }
-            hostCache = undefined;
-            program = newProgram;
-            program.getTypeChecker();
-            return;
-            function getOrCreateSourceFile(fileName) {
-                return getOrCreateSourceFileByPath(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName));
-            }
-            function getOrCreateSourceFileByPath(fileName, path) {
-                ts.Debug.assert(hostCache !== undefined);
-                var hostFileInformation = hostCache.getOrCreateEntryByPath(fileName, path);
-                if (!hostFileInformation) {
-                    return undefined;
-                }
-                if (!changesInCompilationSettingsAffectSyntax) {
-                    var oldSourceFile = program && program.getSourceFileByPath(path);
-                    if (oldSourceFile) {
-                        ts.Debug.assert(hostFileInformation.scriptKind === oldSourceFile.scriptKind, "Registered script kind (" + oldSourceFile.scriptKind + ") should match new script kind (" + hostFileInformation.scriptKind + ") for file: " + path);
-                        return documentRegistry.updateDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
-                    }
-                }
-                return documentRegistry.acquireDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
-            }
-            function sourceFileUpToDate(sourceFile) {
-                if (!sourceFile) {
-                    return false;
-                }
-                var path = sourceFile.path || ts.toPath(sourceFile.fileName, currentDirectory, getCanonicalFileName);
-                return sourceFile.version === hostCache.getVersion(path);
-            }
-            function programUpToDate() {
-                if (!program) {
-                    return false;
-                }
-                var rootFileNames = hostCache.getRootFileNames();
-                if (program.getSourceFiles().length !== rootFileNames.length) {
-                    return false;
-                }
-                for (var _i = 0, rootFileNames_2 = rootFileNames; _i < rootFileNames_2.length; _i++) {
-                    var fileName = rootFileNames_2[_i];
-                    if (!sourceFileUpToDate(program.getSourceFile(fileName))) {
-                        return false;
-                    }
-                }
-                return ts.compareDataObjects(program.getCompilerOptions(), hostCache.compilationSettings());
-            }
-        }
-        function getProgram() {
-            synchronizeHostData();
-            return program;
-        }
-        function cleanupSemanticCache() {
-        }
-        function dispose() {
-            if (program) {
-                ts.forEach(program.getSourceFiles(), function (f) {
-                    return documentRegistry.releaseDocument(f.fileName, program.getCompilerOptions());
-                });
-            }
-        }
-        function getSyntacticDiagnostics(fileName) {
-            synchronizeHostData();
-            return program.getSyntacticDiagnostics(getValidSourceFile(fileName), cancellationToken);
-        }
-        function getSemanticDiagnostics(fileName) {
-            synchronizeHostData();
-            var targetSourceFile = getValidSourceFile(fileName);
-            var semanticDiagnostics = program.getSemanticDiagnostics(targetSourceFile, cancellationToken);
-            if (!program.getCompilerOptions().declaration) {
-                return semanticDiagnostics;
-            }
-            var declarationDiagnostics = program.getDeclarationDiagnostics(targetSourceFile, cancellationToken);
-            return ts.concatenate(semanticDiagnostics, declarationDiagnostics);
-        }
-        function getCompilerOptionsDiagnostics() {
-            synchronizeHostData();
-            return program.getOptionsDiagnostics(cancellationToken).concat(program.getGlobalDiagnostics(cancellationToken));
-        }
-        function getCompletionEntryDisplayNameForSymbol(symbol, target, performCharacterChecks, location) {
-            var displayName = ts.getDeclaredName(program.getTypeChecker(), symbol, location);
-            if (displayName) {
-                var firstCharCode = displayName.charCodeAt(0);
-                if ((symbol.flags & 1536) && (firstCharCode === 39 || firstCharCode === 34)) {
-                    return undefined;
-                }
-            }
-            return getCompletionEntryDisplayName(displayName, target, performCharacterChecks);
-        }
-        function getCompletionEntryDisplayName(name, target, performCharacterChecks) {
-            if (!name) {
-                return undefined;
-            }
-            name = ts.stripQuotes(name);
-            if (!name) {
-                return undefined;
-            }
-            if (performCharacterChecks) {
-                if (!ts.isIdentifier(name, target)) {
-                    return undefined;
-                }
-            }
-            return name;
-        }
-        function getCompletionData(fileName, position) {
-            var typeChecker = program.getTypeChecker();
-            var sourceFile = getValidSourceFile(fileName);
-            var isJavaScriptFile = ts.isSourceFileJavaScript(sourceFile);
-            var isJsDocTagName = false;
-            var start = new Date().getTime();
-            var currentToken = ts.getTokenAtPosition(sourceFile, position);
-            log("getCompletionData: Get current token: " + (new Date().getTime() - start));
-            start = new Date().getTime();
-            var insideComment = isInsideComment(sourceFile, currentToken, position);
-            log("getCompletionData: Is inside comment: " + (new Date().getTime() - start));
-            if (insideComment) {
-                if (ts.hasDocComment(sourceFile, position) && sourceFile.text.charCodeAt(position - 1) === 64) {
-                    isJsDocTagName = true;
-                }
-                var insideJsDocTagExpression = false;
-                var tag = ts.getJsDocTagAtPosition(sourceFile, position);
-                if (tag) {
-                    if (tag.tagName.pos <= position && position <= tag.tagName.end) {
-                        isJsDocTagName = true;
-                    }
-                    switch (tag.kind) {
-                        case 277:
-                        case 275:
-                        case 276:
-                            var tagWithExpression = tag;
-                            if (tagWithExpression.typeExpression) {
-                                insideJsDocTagExpression = tagWithExpression.typeExpression.pos < position && position < tagWithExpression.typeExpression.end;
-                            }
-                            break;
-                    }
-                }
-                if (isJsDocTagName) {
-                    return { symbols: undefined, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, isJsDocTagName: isJsDocTagName };
-                }
-                if (!insideJsDocTagExpression) {
-                    log("Returning an empty list because completion was inside a regular comment or plain text part of a JsDoc comment.");
-                    return undefined;
-                }
-            }
-            start = new Date().getTime();
-            var previousToken = ts.findPrecedingToken(position, sourceFile);
-            log("getCompletionData: Get previous token 1: " + (new Date().getTime() - start));
-            var contextToken = previousToken;
-            if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
-                var start_5 = new Date().getTime();
-                contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
-                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_5));
-            }
-            var node = currentToken;
-            var isRightOfDot = false;
-            var isRightOfOpenTag = false;
-            var isStartingCloseTag = false;
-            var location = ts.getTouchingPropertyName(sourceFile, position);
-            if (contextToken) {
-                if (isCompletionListBlocker(contextToken)) {
-                    log("Returning an empty list because completion was requested in an invalid position.");
-                    return undefined;
-                }
-                var parent_16 = contextToken.parent, kind = contextToken.kind;
-                if (kind === 21) {
-                    if (parent_16.kind === 172) {
-                        node = contextToken.parent.expression;
-                        isRightOfDot = true;
-                    }
-                    else if (parent_16.kind === 139) {
-                        node = contextToken.parent.left;
-                        isRightOfDot = true;
-                    }
-                    else {
-                        return undefined;
-                    }
-                }
-                else if (sourceFile.languageVariant === 1) {
-                    if (kind === 25) {
-                        isRightOfOpenTag = true;
-                        location = contextToken;
-                    }
-                    else if (kind === 39 && contextToken.parent.kind === 245) {
-                        isStartingCloseTag = true;
-                        location = contextToken;
-                    }
-                }
-            }
-            var semanticStart = new Date().getTime();
-            var isMemberCompletion;
-            var isNewIdentifierLocation;
-            var symbols = [];
-            if (isRightOfDot) {
-                getTypeScriptMemberSymbols();
-            }
-            else if (isRightOfOpenTag) {
-                var tagSymbols = typeChecker.getJsxIntrinsicTagNames();
-                if (tryGetGlobalSymbols()) {
-                    symbols = tagSymbols.concat(symbols.filter(function (s) { return !!(s.flags & (107455 | 8388608)); }));
-                }
-                else {
-                    symbols = tagSymbols;
-                }
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-            }
-            else if (isStartingCloseTag) {
-                var tagName = contextToken.parent.parent.openingElement.tagName;
-                var tagSymbol = typeChecker.getSymbolAtLocation(tagName);
-                if (!typeChecker.isUnknownSymbol(tagSymbol)) {
-                    symbols = [tagSymbol];
-                }
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-            }
-            else {
-                if (!tryGetGlobalSymbols()) {
-                    return undefined;
-                }
-            }
-            log("getCompletionData: Semantic work: " + (new Date().getTime() - semanticStart));
-            return { symbols: symbols, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, location: location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), isJsDocTagName: isJsDocTagName };
-            function getTypeScriptMemberSymbols() {
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-                if (node.kind === 69 || node.kind === 139 || node.kind === 172) {
-                    var symbol = typeChecker.getSymbolAtLocation(node);
-                    if (symbol && symbol.flags & 8388608) {
-                        symbol = typeChecker.getAliasedSymbol(symbol);
-                    }
-                    if (symbol && symbol.flags & 1952) {
-                        var exportedSymbols = typeChecker.getExportsOfModule(symbol);
-                        ts.forEach(exportedSymbols, function (symbol) {
-                            if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
-                                symbols.push(symbol);
-                            }
-                        });
-                    }
-                }
-                var type = typeChecker.getTypeAtLocation(node);
-                addTypeProperties(type);
-            }
-            function addTypeProperties(type) {
-                if (type) {
-                    for (var _i = 0, _a = type.getApparentProperties(); _i < _a.length; _i++) {
-                        var symbol = _a[_i];
-                        if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
-                            symbols.push(symbol);
-                        }
-                    }
-                    if (isJavaScriptFile && type.flags & 16384) {
-                        var unionType = type;
-                        for (var _b = 0, _c = unionType.types; _b < _c.length; _b++) {
-                            var elementType = _c[_b];
-                            addTypeProperties(elementType);
-                        }
-                    }
-                }
-            }
-            function tryGetGlobalSymbols() {
-                var objectLikeContainer;
-                var namedImportsOrExports;
-                var jsxContainer;
-                if (objectLikeContainer = tryGetObjectLikeCompletionContainer(contextToken)) {
-                    return tryGetObjectLikeCompletionSymbols(objectLikeContainer);
-                }
-                if (namedImportsOrExports = tryGetNamedImportsOrExportsForCompletion(contextToken)) {
-                    return tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports);
-                }
-                if (jsxContainer = tryGetContainingJsxElement(contextToken)) {
-                    var attrsType = void 0;
-                    if ((jsxContainer.kind === 242) || (jsxContainer.kind === 243)) {
-                        attrsType = typeChecker.getJsxElementAttributesType(jsxContainer);
-                        if (attrsType) {
-                            symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), jsxContainer.attributes);
-                            isMemberCompletion = true;
-                            isNewIdentifierLocation = false;
-                            return true;
-                        }
-                    }
-                }
-                isMemberCompletion = false;
-                isNewIdentifierLocation = isNewIdentifierDefinitionLocation(contextToken);
-                if (previousToken !== contextToken) {
-                    ts.Debug.assert(!!previousToken, "Expected 'contextToken' to be defined when different from 'previousToken'.");
-                }
-                var adjustedPosition = previousToken !== contextToken ?
-                    previousToken.getStart() :
-                    position;
-                var scopeNode = getScopeNode(contextToken, adjustedPosition, sourceFile) || sourceFile;
-                var symbolMeanings = 793056 | 107455 | 1536 | 8388608;
-                symbols = typeChecker.getSymbolsInScope(scopeNode, symbolMeanings);
-                return true;
-            }
-            function getScopeNode(initialToken, position, sourceFile) {
-                var scope = initialToken;
-                while (scope && !ts.positionBelongsToNode(scope, position, sourceFile)) {
-                    scope = scope.parent;
-                }
-                return scope;
-            }
-            function isCompletionListBlocker(contextToken) {
-                var start = new Date().getTime();
-                var result = isInStringOrRegularExpressionOrTemplateLiteral(contextToken) ||
-                    isSolelyIdentifierDefinitionLocation(contextToken) ||
-                    isDotOfNumericLiteral(contextToken) ||
-                    isInJsxText(contextToken);
-                log("getCompletionsAtPosition: isCompletionListBlocker: " + (new Date().getTime() - start));
-                return result;
-            }
-            function isInJsxText(contextToken) {
-                if (contextToken.kind === 244) {
-                    return true;
-                }
-                if (contextToken.kind === 27 && contextToken.parent) {
-                    if (contextToken.parent.kind === 243) {
-                        return true;
-                    }
-                    if (contextToken.parent.kind === 245 || contextToken.parent.kind === 242) {
-                        return contextToken.parent.parent && contextToken.parent.parent.kind === 241;
-                    }
-                }
-                return false;
-            }
-            function isNewIdentifierDefinitionLocation(previousToken) {
-                if (previousToken) {
-                    var containingNodeKind = previousToken.parent.kind;
-                    switch (previousToken.kind) {
-                        case 24:
-                            return containingNodeKind === 174
-                                || containingNodeKind === 148
-                                || containingNodeKind === 175
-                                || containingNodeKind === 170
-                                || containingNodeKind === 187
-                                || containingNodeKind === 156;
-                        case 17:
-                            return containingNodeKind === 174
-                                || containingNodeKind === 148
-                                || containingNodeKind === 175
-                                || containingNodeKind === 178
-                                || containingNodeKind === 164;
-                        case 19:
-                            return containingNodeKind === 170
-                                || containingNodeKind === 153
-                                || containingNodeKind === 140;
-                        case 125:
-                        case 126:
-                            return true;
-                        case 21:
-                            return containingNodeKind === 225;
-                        case 15:
-                            return containingNodeKind === 221;
-                        case 56:
-                            return containingNodeKind === 218
-                                || containingNodeKind === 187;
-                        case 12:
-                            return containingNodeKind === 189;
-                        case 13:
-                            return containingNodeKind === 197;
-                        case 112:
-                        case 110:
-                        case 111:
-                            return containingNodeKind === 145;
-                    }
-                    switch (previousToken.getText()) {
-                        case "public":
-                        case "protected":
-                        case "private":
-                            return true;
-                    }
-                }
-                return false;
-            }
-            function isInStringOrRegularExpressionOrTemplateLiteral(contextToken) {
-                if (contextToken.kind === 9
-                    || contextToken.kind === 166
-                    || contextToken.kind === 10
-                    || ts.isTemplateLiteralKind(contextToken.kind)) {
-                    var start_6 = contextToken.getStart();
-                    var end = contextToken.getEnd();
-                    if (start_6 < position && position < end) {
-                        return true;
-                    }
-                    if (position === end) {
-                        return !!contextToken.isUnterminated
-                            || contextToken.kind === 10;
-                    }
-                }
-                return false;
-            }
-            function tryGetObjectLikeCompletionSymbols(objectLikeContainer) {
-                isMemberCompletion = true;
-                var typeForObject;
-                var existingMembers;
-                if (objectLikeContainer.kind === 171) {
-                    isNewIdentifierLocation = true;
-                    typeForObject = typeChecker.getContextualType(objectLikeContainer);
-                    existingMembers = objectLikeContainer.properties;
-                }
-                else if (objectLikeContainer.kind === 167) {
-                    isNewIdentifierLocation = false;
-                    var rootDeclaration = ts.getRootDeclaration(objectLikeContainer.parent);
-                    if (ts.isVariableLike(rootDeclaration)) {
-                        var canGetType = !!(rootDeclaration.initializer || rootDeclaration.type);
-                        if (!canGetType && rootDeclaration.kind === 142) {
-                            if (ts.isExpression(rootDeclaration.parent)) {
-                                canGetType = !!typeChecker.getContextualType(rootDeclaration.parent);
-                            }
-                            else if (rootDeclaration.parent.kind === 147 || rootDeclaration.parent.kind === 150) {
-                                canGetType = ts.isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(rootDeclaration.parent.parent);
-                            }
-                        }
-                        if (canGetType) {
-                            typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
-                            existingMembers = objectLikeContainer.elements;
-                        }
-                    }
-                    else {
-                        ts.Debug.fail("Root declaration is not variable-like.");
-                    }
-                }
-                else {
-                    ts.Debug.fail("Expected object literal or binding pattern, got " + objectLikeContainer.kind);
-                }
-                if (!typeForObject) {
-                    return false;
-                }
-                var typeMembers = typeChecker.getPropertiesOfType(typeForObject);
-                if (typeMembers && typeMembers.length > 0) {
-                    symbols = filterObjectMembersList(typeMembers, existingMembers);
-                }
-                return true;
-            }
-            function tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports) {
-                var declarationKind = namedImportsOrExports.kind === 233 ?
-                    230 :
-                    236;
-                var importOrExportDeclaration = ts.getAncestor(namedImportsOrExports, declarationKind);
-                var moduleSpecifier = importOrExportDeclaration.moduleSpecifier;
-                if (!moduleSpecifier) {
-                    return false;
-                }
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-                var exports;
-                var moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(importOrExportDeclaration.moduleSpecifier);
-                if (moduleSpecifierSymbol) {
-                    exports = typeChecker.getExportsOfModule(moduleSpecifierSymbol);
-                }
-                symbols = exports ? filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements) : emptyArray;
-                return true;
-            }
-            function tryGetObjectLikeCompletionContainer(contextToken) {
-                if (contextToken) {
-                    switch (contextToken.kind) {
-                        case 15:
-                        case 24:
-                            var parent_17 = contextToken.parent;
-                            if (parent_17 && (parent_17.kind === 171 || parent_17.kind === 167)) {
-                                return parent_17;
-                            }
-                            break;
-                    }
-                }
-                return undefined;
-            }
-            function tryGetNamedImportsOrExportsForCompletion(contextToken) {
-                if (contextToken) {
-                    switch (contextToken.kind) {
-                        case 15:
-                        case 24:
-                            switch (contextToken.parent.kind) {
-                                case 233:
-                                case 237:
-                                    return contextToken.parent;
-                            }
-                    }
-                }
-                return undefined;
-            }
-            function tryGetContainingJsxElement(contextToken) {
-                if (contextToken) {
-                    var parent_18 = contextToken.parent;
-                    switch (contextToken.kind) {
-                        case 26:
-                        case 39:
-                        case 69:
-                        case 246:
-                        case 247:
-                            if (parent_18 && (parent_18.kind === 242 || parent_18.kind === 243)) {
-                                return parent_18;
-                            }
-                            else if (parent_18.kind === 246) {
-                                return parent_18.parent;
-                            }
-                            break;
-                        case 9:
-                            if (parent_18 && ((parent_18.kind === 246) || (parent_18.kind === 247))) {
-                                return parent_18.parent;
-                            }
-                            break;
-                        case 16:
-                            if (parent_18 &&
-                                parent_18.kind === 248 &&
-                                parent_18.parent &&
-                                (parent_18.parent.kind === 246)) {
-                                return parent_18.parent.parent;
-                            }
-                            if (parent_18 && parent_18.kind === 247) {
-                                return parent_18.parent;
-                            }
-                            break;
-                    }
-                }
-                return undefined;
-            }
-            function isFunction(kind) {
-                switch (kind) {
-                    case 179:
-                    case 180:
-                    case 220:
-                    case 147:
-                    case 146:
-                    case 149:
-                    case 150:
-                    case 151:
-                    case 152:
-                    case 153:
-                        return true;
-                }
-                return false;
-            }
-            function isSolelyIdentifierDefinitionLocation(contextToken) {
-                var containingNodeKind = contextToken.parent.kind;
-                switch (contextToken.kind) {
-                    case 24:
-                        return containingNodeKind === 218 ||
-                            containingNodeKind === 219 ||
-                            containingNodeKind === 200 ||
-                            containingNodeKind === 224 ||
-                            isFunction(containingNodeKind) ||
-                            containingNodeKind === 221 ||
-                            containingNodeKind === 192 ||
-                            containingNodeKind === 222 ||
-                            containingNodeKind === 168 ||
-                            containingNodeKind === 223;
-                    case 21:
-                        return containingNodeKind === 168;
-                    case 54:
-                        return containingNodeKind === 169;
-                    case 19:
-                        return containingNodeKind === 168;
-                    case 17:
-                        return containingNodeKind === 252 ||
-                            isFunction(containingNodeKind);
-                    case 15:
-                        return containingNodeKind === 224 ||
-                            containingNodeKind === 222 ||
-                            containingNodeKind === 159;
-                    case 23:
-                        return containingNodeKind === 144 &&
-                            contextToken.parent && contextToken.parent.parent &&
-                            (contextToken.parent.parent.kind === 222 ||
-                                contextToken.parent.parent.kind === 159);
-                    case 25:
-                        return containingNodeKind === 221 ||
-                            containingNodeKind === 192 ||
-                            containingNodeKind === 222 ||
-                            containingNodeKind === 223 ||
-                            isFunction(containingNodeKind);
-                    case 113:
-                        return containingNodeKind === 145;
-                    case 22:
-                        return containingNodeKind === 142 ||
-                            (contextToken.parent && contextToken.parent.parent &&
-                                contextToken.parent.parent.kind === 168);
-                    case 112:
-                    case 110:
-                    case 111:
-                        return containingNodeKind === 142;
-                    case 116:
-                        return containingNodeKind === 234 ||
-                            containingNodeKind === 238 ||
-                            containingNodeKind === 232;
-                    case 73:
-                    case 81:
-                    case 107:
-                    case 87:
-                    case 102:
-                    case 123:
-                    case 131:
-                    case 89:
-                    case 108:
-                    case 74:
-                    case 114:
-                    case 134:
-                        return true;
-                }
-                switch (contextToken.getText()) {
-                    case "abstract":
-                    case "async":
-                    case "class":
-                    case "const":
-                    case "declare":
-                    case "enum":
-                    case "function":
-                    case "interface":
-                    case "let":
-                    case "private":
-                    case "protected":
-                    case "public":
-                    case "static":
-                    case "var":
-                    case "yield":
-                        return true;
-                }
-                return false;
-            }
-            function isDotOfNumericLiteral(contextToken) {
-                if (contextToken.kind === 8) {
-                    var text = contextToken.getFullText();
-                    return text.charAt(text.length - 1) === ".";
-                }
-                return false;
-            }
-            function filterNamedImportOrExportCompletionItems(exportsOfModule, namedImportsOrExports) {
-                var existingImportsOrExports = {};
-                for (var _i = 0, namedImportsOrExports_1 = namedImportsOrExports; _i < namedImportsOrExports_1.length; _i++) {
-                    var element = namedImportsOrExports_1[_i];
-                    if (element.getStart() <= position && position <= element.getEnd()) {
-                        continue;
-                    }
-                    var name_39 = element.propertyName || element.name;
-                    existingImportsOrExports[name_39.text] = true;
-                }
-                if (ts.isEmpty(existingImportsOrExports)) {
-                    return ts.filter(exportsOfModule, function (e) { return e.name !== "default"; });
-                }
-                return ts.filter(exportsOfModule, function (e) { return e.name !== "default" && !ts.lookUp(existingImportsOrExports, e.name); });
-            }
-            function filterObjectMembersList(contextualMemberSymbols, existingMembers) {
-                if (!existingMembers || existingMembers.length === 0) {
-                    return contextualMemberSymbols;
-                }
-                var existingMemberNames = {};
-                for (var _i = 0, existingMembers_1 = existingMembers; _i < existingMembers_1.length; _i++) {
-                    var m = existingMembers_1[_i];
-                    if (m.kind !== 253 &&
-                        m.kind !== 254 &&
-                        m.kind !== 169 &&
-                        m.kind !== 147) {
-                        continue;
-                    }
-                    if (m.getStart() <= position && position <= m.getEnd()) {
-                        continue;
-                    }
-                    var existingName = void 0;
-                    if (m.kind === 169 && m.propertyName) {
-                        if (m.propertyName.kind === 69) {
-                            existingName = m.propertyName.text;
-                        }
-                    }
-                    else {
-                        existingName = m.name.text;
-                    }
-                    existingMemberNames[existingName] = true;
-                }
-                return ts.filter(contextualMemberSymbols, function (m) { return !ts.lookUp(existingMemberNames, m.name); });
-            }
-            function filterJsxAttributes(symbols, attributes) {
-                var seenNames = {};
-                for (var _i = 0, attributes_1 = attributes; _i < attributes_1.length; _i++) {
-                    var attr = attributes_1[_i];
-                    if (attr.getStart() <= position && position <= attr.getEnd()) {
-                        continue;
-                    }
-                    if (attr.kind === 246) {
-                        seenNames[attr.name.text] = true;
-                    }
-                }
-                return ts.filter(symbols, function (a) { return !ts.lookUp(seenNames, a.name); });
-            }
-        }
-        function getCompletionsAtPosition(fileName, position) {
-            synchronizeHostData();
-            var completionData = getCompletionData(fileName, position);
-            if (!completionData) {
-                return undefined;
-            }
-            var symbols = completionData.symbols, isMemberCompletion = completionData.isMemberCompletion, isNewIdentifierLocation = completionData.isNewIdentifierLocation, location = completionData.location, isJsDocTagName = completionData.isJsDocTagName;
-            if (isJsDocTagName) {
-                return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: getAllJsDocCompletionEntries() };
-            }
-            var sourceFile = getValidSourceFile(fileName);
-            var entries = [];
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                var uniqueNames = getCompletionEntriesFromSymbols(symbols, entries);
-                ts.addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames));
-            }
-            else {
-                if (!symbols || symbols.length === 0) {
-                    if (sourceFile.languageVariant === 1 &&
-                        location.parent && location.parent.kind === 245) {
-                        var tagName = location.parent.parent.openingElement.tagName;
-                        entries.push({
-                            name: tagName.text,
-                            kind: undefined,
-                            kindModifiers: undefined,
-                            sortText: "0"
-                        });
-                    }
-                    else {
-                        return undefined;
-                    }
-                }
-                getCompletionEntriesFromSymbols(symbols, entries);
-            }
-            if (!isMemberCompletion && !isJsDocTagName) {
-                ts.addRange(entries, keywordCompletions);
-            }
-            return { isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries: entries };
-            function getJavaScriptCompletionEntries(sourceFile, position, uniqueNames) {
-                var entries = [];
-                var target = program.getCompilerOptions().target;
-                var nameTable = getNameTable(sourceFile);
-                for (var name_40 in nameTable) {
-                    if (nameTable[name_40] === position) {
-                        continue;
-                    }
-                    if (!uniqueNames[name_40]) {
-                        uniqueNames[name_40] = name_40;
-                        var displayName = getCompletionEntryDisplayName(name_40, target, true);
-                        if (displayName) {
-                            var entry = {
-                                name: displayName,
-                                kind: ScriptElementKind.warning,
-                                kindModifiers: "",
-                                sortText: "1"
-                            };
-                            entries.push(entry);
-                        }
-                    }
-                }
-                return entries;
-            }
-            function getAllJsDocCompletionEntries() {
-                return jsDocCompletionEntries || (jsDocCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
-                    return {
-                        name: tagName,
-                        kind: ScriptElementKind.keyword,
-                        kindModifiers: "",
-                        sortText: "0"
-                    };
-                }));
-            }
-            function createCompletionEntry(symbol, location) {
-                var displayName = getCompletionEntryDisplayNameForSymbol(symbol, program.getCompilerOptions().target, true, location);
-                if (!displayName) {
-                    return undefined;
-                }
-                return {
-                    name: displayName,
-                    kind: getSymbolKind(symbol, location),
-                    kindModifiers: getSymbolModifiers(symbol),
-                    sortText: "0"
-                };
-            }
-            function getCompletionEntriesFromSymbols(symbols, entries) {
-                var start = new Date().getTime();
-                var uniqueNames = {};
-                if (symbols) {
-                    for (var _i = 0, symbols_4 = symbols; _i < symbols_4.length; _i++) {
-                        var symbol = symbols_4[_i];
-                        var entry = createCompletionEntry(symbol, location);
-                        if (entry) {
-                            var id = ts.escapeIdentifier(entry.name);
-                            if (!ts.lookUp(uniqueNames, id)) {
-                                entries.push(entry);
-                                uniqueNames[id] = id;
-                            }
-                        }
-                    }
-                }
-                log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (new Date().getTime() - start));
-                return uniqueNames;
-            }
-        }
-        function getCompletionEntryDetails(fileName, position, entryName) {
-            synchronizeHostData();
-            var completionData = getCompletionData(fileName, position);
-            if (completionData) {
-                var symbols = completionData.symbols, location_2 = completionData.location;
-                var target_2 = program.getCompilerOptions().target;
-                var symbol = ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(s, target_2, false, location_2) === entryName ? s : undefined; });
-                if (symbol) {
-                    var _a = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, getValidSourceFile(fileName), location_2, location_2, 7), displayParts = _a.displayParts, documentation = _a.documentation, symbolKind = _a.symbolKind;
-                    return {
-                        name: entryName,
-                        kindModifiers: getSymbolModifiers(symbol),
-                        kind: symbolKind,
-                        displayParts: displayParts,
-                        documentation: documentation
-                    };
-                }
-            }
-            var keywordCompletion = ts.forEach(keywordCompletions, function (c) { return c.name === entryName; });
-            if (keywordCompletion) {
-                return {
-                    name: entryName,
-                    kind: ScriptElementKind.keyword,
-                    kindModifiers: ScriptElementKindModifier.none,
-                    displayParts: [ts.displayPart(entryName, SymbolDisplayPartKind.keyword)],
-                    documentation: undefined
-                };
-            }
-            return undefined;
-        }
-        function getSymbolKind(symbol, location) {
-            var flags = symbol.getFlags();
-            if (flags & 32)
-                return ts.getDeclarationOfKind(symbol, 192) ?
-                    ScriptElementKind.localClassElement : ScriptElementKind.classElement;
-            if (flags & 384)
-                return ScriptElementKind.enumElement;
-            if (flags & 524288)
-                return ScriptElementKind.typeElement;
-            if (flags & 64)
-                return ScriptElementKind.interfaceElement;
-            if (flags & 262144)
-                return ScriptElementKind.typeParameterElement;
-            var result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location);
-            if (result === ScriptElementKind.unknown) {
-                if (flags & 262144)
-                    return ScriptElementKind.typeParameterElement;
-                if (flags & 8)
-                    return ScriptElementKind.variableElement;
-                if (flags & 8388608)
-                    return ScriptElementKind.alias;
-                if (flags & 1536)
-                    return ScriptElementKind.moduleElement;
-            }
-            return result;
-        }
-        function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location) {
-            var typeChecker = program.getTypeChecker();
-            if (typeChecker.isUndefinedSymbol(symbol)) {
-                return ScriptElementKind.variableElement;
-            }
-            if (typeChecker.isArgumentsSymbol(symbol)) {
-                return ScriptElementKind.localVariableElement;
-            }
-            if (location.kind === 97 && ts.isExpression(location)) {
-                return ScriptElementKind.parameterElement;
-            }
-            if (flags & 3) {
-                if (ts.isFirstDeclarationOfSymbolParameter(symbol)) {
-                    return ScriptElementKind.parameterElement;
-                }
-                else if (symbol.valueDeclaration && ts.isConst(symbol.valueDeclaration)) {
-                    return ScriptElementKind.constElement;
-                }
-                else if (ts.forEach(symbol.declarations, ts.isLet)) {
-                    return ScriptElementKind.letElement;
-                }
-                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localVariableElement : ScriptElementKind.variableElement;
-            }
-            if (flags & 16)
-                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localFunctionElement : ScriptElementKind.functionElement;
-            if (flags & 32768)
-                return ScriptElementKind.memberGetAccessorElement;
-            if (flags & 65536)
-                return ScriptElementKind.memberSetAccessorElement;
-            if (flags & 8192)
-                return ScriptElementKind.memberFunctionElement;
-            if (flags & 16384)
-                return ScriptElementKind.constructorImplementationElement;
-            if (flags & 4) {
-                if (flags & 268435456) {
-                    var unionPropertyKind = ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
-                        var rootSymbolFlags = rootSymbol.getFlags();
-                        if (rootSymbolFlags & (98308 | 3)) {
-                            return ScriptElementKind.memberVariableElement;
-                        }
-                        ts.Debug.assert(!!(rootSymbolFlags & 8192));
-                    });
-                    if (!unionPropertyKind) {
-                        var typeOfUnionProperty = typeChecker.getTypeOfSymbolAtLocation(symbol, location);
-                        if (typeOfUnionProperty.getCallSignatures().length) {
-                            return ScriptElementKind.memberFunctionElement;
-                        }
-                        return ScriptElementKind.memberVariableElement;
-                    }
-                    return unionPropertyKind;
-                }
-                return ScriptElementKind.memberVariableElement;
-            }
-            return ScriptElementKind.unknown;
-        }
-        function getSymbolModifiers(symbol) {
-            return symbol && symbol.declarations && symbol.declarations.length > 0
-                ? ts.getNodeModifiers(symbol.declarations[0])
-                : ScriptElementKindModifier.none;
-        }
-        function getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, enclosingDeclaration, location, semanticMeaning) {
-            if (semanticMeaning === void 0) { semanticMeaning = getMeaningFromLocation(location); }
-            var typeChecker = program.getTypeChecker();
-            var displayParts = [];
-            var documentation;
-            var symbolFlags = symbol.flags;
-            var symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, symbolFlags, location);
-            var hasAddedSymbolInfo;
-            var isThisExpression = location.kind === 97 && ts.isExpression(location);
-            var type;
-            if (symbolKind !== ScriptElementKind.unknown || symbolFlags & 32 || symbolFlags & 8388608) {
-                if (symbolKind === ScriptElementKind.memberGetAccessorElement || symbolKind === ScriptElementKind.memberSetAccessorElement) {
-                    symbolKind = ScriptElementKind.memberVariableElement;
-                }
-                var signature = void 0;
-                type = isThisExpression ? typeChecker.getTypeAtLocation(location) : typeChecker.getTypeOfSymbolAtLocation(symbol, location);
-                if (type) {
-                    if (location.parent && location.parent.kind === 172) {
-                        var right = location.parent.name;
-                        if (right === location || (right && right.getFullWidth() === 0)) {
-                            location = location.parent;
-                        }
-                    }
-                    var callExpression = void 0;
-                    if (location.kind === 174 || location.kind === 175) {
-                        callExpression = location;
-                    }
-                    else if (isCallExpressionTarget(location) || isNewExpressionTarget(location)) {
-                        callExpression = location.parent;
-                    }
-                    if (callExpression) {
-                        var candidateSignatures = [];
-                        signature = typeChecker.getResolvedSignature(callExpression, candidateSignatures);
-                        if (!signature && candidateSignatures.length) {
-                            signature = candidateSignatures[0];
-                        }
-                        var useConstructSignatures = callExpression.kind === 175 || callExpression.expression.kind === 95;
-                        var allSignatures = useConstructSignatures ? type.getConstructSignatures() : type.getCallSignatures();
-                        if (!ts.contains(allSignatures, signature.target) && !ts.contains(allSignatures, signature)) {
-                            signature = allSignatures.length ? allSignatures[0] : undefined;
-                        }
-                        if (signature) {
-                            if (useConstructSignatures && (symbolFlags & 32)) {
-                                symbolKind = ScriptElementKind.constructorImplementationElement;
-                                addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
-                            }
-                            else if (symbolFlags & 8388608) {
-                                symbolKind = ScriptElementKind.alias;
-                                pushTypePart(symbolKind);
-                                displayParts.push(ts.spacePart());
-                                if (useConstructSignatures) {
-                                    displayParts.push(ts.keywordPart(92));
-                                    displayParts.push(ts.spacePart());
-                                }
-                                addFullSymbolName(symbol);
-                            }
-                            else {
-                                addPrefixForAnyFunctionOrVar(symbol, symbolKind);
-                            }
-                            switch (symbolKind) {
-                                case ScriptElementKind.memberVariableElement:
-                                case ScriptElementKind.variableElement:
-                                case ScriptElementKind.constElement:
-                                case ScriptElementKind.letElement:
-                                case ScriptElementKind.parameterElement:
-                                case ScriptElementKind.localVariableElement:
-                                    displayParts.push(ts.punctuationPart(54));
-                                    displayParts.push(ts.spacePart());
-                                    if (useConstructSignatures) {
-                                        displayParts.push(ts.keywordPart(92));
-                                        displayParts.push(ts.spacePart());
-                                    }
-                                    if (!(type.flags & 65536) && type.symbol) {
-                                        ts.addRange(displayParts, ts.symbolToDisplayParts(typeChecker, type.symbol, enclosingDeclaration, undefined, 1));
-                                    }
-                                    addSignatureDisplayParts(signature, allSignatures, 8);
-                                    break;
-                                default:
-                                    addSignatureDisplayParts(signature, allSignatures);
-                            }
-                            hasAddedSymbolInfo = true;
-                        }
-                    }
-                    else if ((isNameOfFunctionDeclaration(location) && !(symbol.flags & 98304)) ||
-                        (location.kind === 121 && location.parent.kind === 148)) {
-                        var functionDeclaration = location.parent;
-                        var allSignatures = functionDeclaration.kind === 148 ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
-                        if (!typeChecker.isImplementationOfOverload(functionDeclaration)) {
-                            signature = typeChecker.getSignatureFromDeclaration(functionDeclaration);
-                        }
-                        else {
-                            signature = allSignatures[0];
-                        }
-                        if (functionDeclaration.kind === 148) {
-                            symbolKind = ScriptElementKind.constructorImplementationElement;
-                            addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
-                        }
-                        else {
-                            addPrefixForAnyFunctionOrVar(functionDeclaration.kind === 151 &&
-                                !(type.symbol.flags & 2048 || type.symbol.flags & 4096) ? type.symbol : symbol, symbolKind);
-                        }
-                        addSignatureDisplayParts(signature, allSignatures);
-                        hasAddedSymbolInfo = true;
-                    }
-                }
-            }
-            if (symbolFlags & 32 && !hasAddedSymbolInfo && !isThisExpression) {
-                if (ts.getDeclarationOfKind(symbol, 192)) {
-                    pushTypePart(ScriptElementKind.localClassElement);
-                }
-                else {
-                    displayParts.push(ts.keywordPart(73));
-                }
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                writeTypeParametersOfSymbol(symbol, sourceFile);
-            }
-            if ((symbolFlags & 64) && (semanticMeaning & 2)) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(107));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                writeTypeParametersOfSymbol(symbol, sourceFile);
-            }
-            if (symbolFlags & 524288) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(134));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                writeTypeParametersOfSymbol(symbol, sourceFile);
-                displayParts.push(ts.spacePart());
-                displayParts.push(ts.operatorPart(56));
-                displayParts.push(ts.spacePart());
-                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, typeChecker.getDeclaredTypeOfSymbol(symbol), enclosingDeclaration));
-            }
-            if (symbolFlags & 384) {
-                addNewLineIfDisplayPartsExist();
-                if (ts.forEach(symbol.declarations, ts.isConstEnumDeclaration)) {
-                    displayParts.push(ts.keywordPart(74));
-                    displayParts.push(ts.spacePart());
-                }
-                displayParts.push(ts.keywordPart(81));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-            }
-            if (symbolFlags & 1536) {
-                addNewLineIfDisplayPartsExist();
-                var declaration = ts.getDeclarationOfKind(symbol, 225);
-                var isNamespace = declaration && declaration.name && declaration.name.kind === 69;
-                displayParts.push(ts.keywordPart(isNamespace ? 126 : 125));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-            }
-            if ((symbolFlags & 262144) && (semanticMeaning & 2)) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.punctuationPart(17));
-                displayParts.push(ts.textPart("type parameter"));
-                displayParts.push(ts.punctuationPart(18));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                displayParts.push(ts.spacePart());
-                displayParts.push(ts.keywordPart(90));
-                displayParts.push(ts.spacePart());
-                if (symbol.parent) {
-                    addFullSymbolName(symbol.parent, enclosingDeclaration);
-                    writeTypeParametersOfSymbol(symbol.parent, enclosingDeclaration);
-                }
-                else {
-                    var declaration = ts.getDeclarationOfKind(symbol, 141);
-                    ts.Debug.assert(declaration !== undefined);
-                    declaration = declaration.parent;
-                    if (declaration) {
-                        if (ts.isFunctionLikeKind(declaration.kind)) {
-                            var signature = typeChecker.getSignatureFromDeclaration(declaration);
-                            if (declaration.kind === 152) {
-                                displayParts.push(ts.keywordPart(92));
-                                displayParts.push(ts.spacePart());
-                            }
-                            else if (declaration.kind !== 151 && declaration.name) {
-                                addFullSymbolName(declaration.symbol);
-                            }
-                            ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, sourceFile, 32));
-                        }
-                        else {
-                            displayParts.push(ts.keywordPart(134));
-                            displayParts.push(ts.spacePart());
-                            addFullSymbolName(declaration.symbol);
-                            writeTypeParametersOfSymbol(declaration.symbol, sourceFile);
-                        }
-                    }
-                }
-            }
-            if (symbolFlags & 8) {
-                addPrefixForAnyFunctionOrVar(symbol, "enum member");
-                var declaration = symbol.declarations[0];
-                if (declaration.kind === 255) {
-                    var constantValue = typeChecker.getConstantValue(declaration);
-                    if (constantValue !== undefined) {
-                        displayParts.push(ts.spacePart());
-                        displayParts.push(ts.operatorPart(56));
-                        displayParts.push(ts.spacePart());
-                        displayParts.push(ts.displayPart(constantValue.toString(), SymbolDisplayPartKind.numericLiteral));
-                    }
-                }
-            }
-            if (symbolFlags & 8388608) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(89));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                ts.forEach(symbol.declarations, function (declaration) {
-                    if (declaration.kind === 229) {
-                        var importEqualsDeclaration = declaration;
-                        if (ts.isExternalModuleImportEqualsDeclaration(importEqualsDeclaration)) {
-                            displayParts.push(ts.spacePart());
-                            displayParts.push(ts.operatorPart(56));
-                            displayParts.push(ts.spacePart());
-                            displayParts.push(ts.keywordPart(129));
-                            displayParts.push(ts.punctuationPart(17));
-                            displayParts.push(ts.displayPart(ts.getTextOfNode(ts.getExternalModuleImportEqualsDeclarationExpression(importEqualsDeclaration)), SymbolDisplayPartKind.stringLiteral));
-                            displayParts.push(ts.punctuationPart(18));
-                        }
-                        else {
-                            var internalAliasSymbol = typeChecker.getSymbolAtLocation(importEqualsDeclaration.moduleReference);
-                            if (internalAliasSymbol) {
-                                displayParts.push(ts.spacePart());
-                                displayParts.push(ts.operatorPart(56));
-                                displayParts.push(ts.spacePart());
-                                addFullSymbolName(internalAliasSymbol, enclosingDeclaration);
-                            }
-                        }
-                        return true;
-                    }
-                });
-            }
-            if (!hasAddedSymbolInfo) {
-                if (symbolKind !== ScriptElementKind.unknown) {
-                    if (type) {
-                        if (isThisExpression) {
-                            addNewLineIfDisplayPartsExist();
-                            displayParts.push(ts.keywordPart(97));
-                        }
-                        else {
-                            addPrefixForAnyFunctionOrVar(symbol, symbolKind);
-                        }
-                        if (symbolKind === ScriptElementKind.memberVariableElement ||
-                            symbolFlags & 3 ||
-                            symbolKind === ScriptElementKind.localVariableElement ||
-                            isThisExpression) {
-                            displayParts.push(ts.punctuationPart(54));
-                            displayParts.push(ts.spacePart());
-                            if (type.symbol && type.symbol.flags & 262144) {
-                                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
-                                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(type, writer, enclosingDeclaration);
-                                });
-                                ts.addRange(displayParts, typeParameterParts);
-                            }
-                            else {
-                                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, type, enclosingDeclaration));
-                            }
-                        }
-                        else if (symbolFlags & 16 ||
-                            symbolFlags & 8192 ||
-                            symbolFlags & 16384 ||
-                            symbolFlags & 131072 ||
-                            symbolFlags & 98304 ||
-                            symbolKind === ScriptElementKind.memberFunctionElement) {
-                            var allSignatures = type.getNonNullableType().getCallSignatures();
-                            addSignatureDisplayParts(allSignatures[0], allSignatures);
-                        }
-                    }
-                }
-                else {
-                    symbolKind = getSymbolKind(symbol, location);
-                }
-            }
-            if (!documentation) {
-                documentation = symbol.getDocumentationComment();
-            }
-            return { displayParts: displayParts, documentation: documentation, symbolKind: symbolKind };
-            function addNewLineIfDisplayPartsExist() {
-                if (displayParts.length) {
-                    displayParts.push(ts.lineBreakPart());
-                }
-            }
-            function addFullSymbolName(symbol, enclosingDeclaration) {
-                var fullSymbolDisplayParts = ts.symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration || sourceFile, undefined, 1 | 2);
-                ts.addRange(displayParts, fullSymbolDisplayParts);
-            }
-            function addPrefixForAnyFunctionOrVar(symbol, symbolKind) {
-                addNewLineIfDisplayPartsExist();
-                if (symbolKind) {
-                    pushTypePart(symbolKind);
-                    displayParts.push(ts.spacePart());
-                    addFullSymbolName(symbol);
-                }
-            }
-            function pushTypePart(symbolKind) {
-                switch (symbolKind) {
-                    case ScriptElementKind.variableElement:
-                    case ScriptElementKind.functionElement:
-                    case ScriptElementKind.letElement:
-                    case ScriptElementKind.constElement:
-                    case ScriptElementKind.constructorImplementationElement:
-                        displayParts.push(ts.textOrKeywordPart(symbolKind));
-                        return;
-                    default:
-                        displayParts.push(ts.punctuationPart(17));
-                        displayParts.push(ts.textOrKeywordPart(symbolKind));
-                        displayParts.push(ts.punctuationPart(18));
-                        return;
-                }
-            }
-            function addSignatureDisplayParts(signature, allSignatures, flags) {
-                ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, enclosingDeclaration, flags | 32));
-                if (allSignatures.length > 1) {
-                    displayParts.push(ts.spacePart());
-                    displayParts.push(ts.punctuationPart(17));
-                    displayParts.push(ts.operatorPart(35));
-                    displayParts.push(ts.displayPart((allSignatures.length - 1).toString(), SymbolDisplayPartKind.numericLiteral));
-                    displayParts.push(ts.spacePart());
-                    displayParts.push(ts.textPart(allSignatures.length === 2 ? "overload" : "overloads"));
-                    displayParts.push(ts.punctuationPart(18));
-                }
-                documentation = signature.getDocumentationComment();
-            }
-            function writeTypeParametersOfSymbol(symbol, enclosingDeclaration) {
-                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
-                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration);
-                });
-                ts.addRange(displayParts, typeParameterParts);
-            }
-        }
-        function getQuickInfoAtPosition(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            if (isLabelName(node)) {
-                return undefined;
-            }
-            var typeChecker = program.getTypeChecker();
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol || typeChecker.isUnknownSymbol(symbol)) {
-                switch (node.kind) {
-                    case 69:
-                    case 172:
-                    case 139:
-                    case 97:
-                    case 165:
-                    case 95:
-                        var type = typeChecker.getTypeAtLocation(node);
-                        if (type) {
-                            return {
-                                kind: ScriptElementKind.unknown,
-                                kindModifiers: ScriptElementKindModifier.none,
-                                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
-                                displayParts: ts.typeToDisplayParts(typeChecker, type, getContainerNode(node)),
-                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined
-                            };
-                        }
-                }
-                return undefined;
-            }
-            var displayPartsDocumentationsAndKind = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, getContainerNode(node), node);
-            return {
-                kind: displayPartsDocumentationsAndKind.symbolKind,
-                kindModifiers: getSymbolModifiers(symbol),
-                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
-                displayParts: displayPartsDocumentationsAndKind.displayParts,
-                documentation: displayPartsDocumentationsAndKind.documentation
-            };
-        }
-        function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
-            return {
-                fileName: node.getSourceFile().fileName,
-                textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
-                kind: symbolKind,
-                name: symbolName,
-                containerKind: undefined,
-                containerName: containerName
-            };
-        }
-        function getDefinitionFromSymbol(symbol, node) {
-            var typeChecker = program.getTypeChecker();
-            var result = [];
-            var declarations = symbol.getDeclarations();
-            var symbolName = typeChecker.symbolToString(symbol);
-            var symbolKind = getSymbolKind(symbol, node);
-            var containerSymbol = symbol.parent;
-            var containerName = containerSymbol ? typeChecker.symbolToString(containerSymbol, node) : "";
-            if (!tryAddConstructSignature(symbol, node, symbolKind, symbolName, containerName, result) &&
-                !tryAddCallSignature(symbol, node, symbolKind, symbolName, containerName, result)) {
-                ts.forEach(declarations, function (declaration) {
-                    result.push(createDefinitionInfo(declaration, symbolKind, symbolName, containerName));
-                });
-            }
-            return result;
-            function tryAddConstructSignature(symbol, location, symbolKind, symbolName, containerName, result) {
-                if (isNewExpressionTarget(location) || location.kind === 121) {
-                    if (symbol.flags & 32) {
-                        for (var _i = 0, _a = symbol.getDeclarations(); _i < _a.length; _i++) {
-                            var declaration = _a[_i];
-                            if (ts.isClassLike(declaration)) {
-                                return tryAddSignature(declaration.members, true, symbolKind, symbolName, containerName, result);
-                            }
-                        }
-                        ts.Debug.fail("Expected declaration to have at least one class-like declaration");
-                    }
-                }
-                return false;
-            }
-            function tryAddCallSignature(symbol, location, symbolKind, symbolName, containerName, result) {
-                if (isCallExpressionTarget(location) || isNewExpressionTarget(location) || isNameOfFunctionDeclaration(location)) {
-                    return tryAddSignature(symbol.declarations, false, symbolKind, symbolName, containerName, result);
-                }
-                return false;
-            }
-            function tryAddSignature(signatureDeclarations, selectConstructors, symbolKind, symbolName, containerName, result) {
-                var declarations = [];
-                var definition;
-                ts.forEach(signatureDeclarations, function (d) {
-                    if ((selectConstructors && d.kind === 148) ||
-                        (!selectConstructors && (d.kind === 220 || d.kind === 147 || d.kind === 146))) {
-                        declarations.push(d);
-                        if (d.body)
-                            definition = d;
-                    }
-                });
-                if (definition) {
-                    result.push(createDefinitionInfo(definition, symbolKind, symbolName, containerName));
-                    return true;
-                }
-                else if (declarations.length) {
-                    result.push(createDefinitionInfo(ts.lastOrUndefined(declarations), symbolKind, symbolName, containerName));
-                    return true;
-                }
-                return false;
-            }
-        }
-        function findReferenceInPosition(refs, pos) {
-            for (var _i = 0, refs_1 = refs; _i < refs_1.length; _i++) {
-                var ref = refs_1[_i];
-                if (ref.pos <= pos && pos < ref.end) {
-                    return ref;
-                }
-            }
-            return undefined;
-        }
-        function getDefinitionInfoForFileReference(name, targetFileName) {
-            return {
-                fileName: targetFileName,
-                textSpan: ts.createTextSpanFromBounds(0, 0),
-                kind: ScriptElementKind.scriptElement,
-                name: name,
-                containerName: undefined,
-                containerKind: undefined
-            };
-        }
-        function getDefinitionAtPosition(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var comment = findReferenceInPosition(sourceFile.referencedFiles, position);
-            if (comment) {
-                var referenceFile = ts.tryResolveScriptReference(program, sourceFile, comment);
-                if (referenceFile) {
-                    return [getDefinitionInfoForFileReference(comment.fileName, referenceFile.fileName)];
-                }
-                return undefined;
-            }
-            var typeReferenceDirective = findReferenceInPosition(sourceFile.typeReferenceDirectives, position);
-            if (typeReferenceDirective) {
-                var referenceFile = ts.lookUp(program.getResolvedTypeReferenceDirectives(), typeReferenceDirective.fileName);
-                if (referenceFile && referenceFile.resolvedFileName) {
-                    return [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
-                }
-                return undefined;
-            }
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            if (isJumpStatementTarget(node)) {
-                var labelName = node.text;
-                var label = getTargetLabel(node.parent, node.text);
-                return label ? [createDefinitionInfo(label, ScriptElementKind.label, labelName, undefined)] : undefined;
-            }
-            var typeChecker = program.getTypeChecker();
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol) {
-                return undefined;
-            }
-            if (symbol.flags & 8388608) {
-                var declaration = symbol.declarations[0];
-                if (node.kind === 69 &&
-                    (node.parent === declaration ||
-                        (declaration.kind === 234 && declaration.parent && declaration.parent.kind === 233))) {
-                    symbol = typeChecker.getAliasedSymbol(symbol);
-                }
-            }
-            if (node.parent.kind === 254) {
-                var shorthandSymbol = typeChecker.getShorthandAssignmentValueSymbol(symbol.valueDeclaration);
-                if (!shorthandSymbol) {
-                    return [];
-                }
-                var shorthandDeclarations = shorthandSymbol.getDeclarations();
-                var shorthandSymbolKind_1 = getSymbolKind(shorthandSymbol, node);
-                var shorthandSymbolName_1 = typeChecker.symbolToString(shorthandSymbol);
-                var shorthandContainerName_1 = typeChecker.symbolToString(symbol.parent, node);
-                return ts.map(shorthandDeclarations, function (declaration) { return createDefinitionInfo(declaration, shorthandSymbolKind_1, shorthandSymbolName_1, shorthandContainerName_1); });
-            }
-            return getDefinitionFromSymbol(symbol, node);
-        }
-        function getTypeDefinitionAtPosition(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            var typeChecker = program.getTypeChecker();
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol) {
-                return undefined;
-            }
-            var type = typeChecker.getTypeOfSymbolAtLocation(symbol, node);
-            if (!type) {
-                return undefined;
-            }
-            if (type.flags & 16384) {
-                var result_3 = [];
-                ts.forEach(type.types, function (t) {
-                    if (t.symbol) {
-                        ts.addRange(result_3, getDefinitionFromSymbol(t.symbol, node));
-                    }
-                });
-                return result_3;
-            }
-            if (!type.symbol) {
-                return undefined;
-            }
-            return getDefinitionFromSymbol(type.symbol, node);
-        }
-        function getOccurrencesAtPosition(fileName, position) {
-            var results = getOccurrencesAtPositionCore(fileName, position);
-            if (results) {
-                var sourceFile_2 = getCanonicalFileName(ts.normalizeSlashes(fileName));
-                results = ts.filter(results, function (r) { return getCanonicalFileName(ts.normalizeSlashes(r.fileName)) === sourceFile_2; });
-            }
-            return results;
-        }
-        function getDocumentHighlights(fileName, position, filesToSearch) {
-            synchronizeHostData();
-            var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingWord(sourceFile, position);
-            if (!node) {
-                return undefined;
-            }
-            return getSemanticDocumentHighlights(node) || getSyntacticDocumentHighlights(node);
-            function getHighlightSpanForNode(node) {
-                var start = node.getStart();
-                var end = node.getEnd();
-                return {
-                    fileName: sourceFile.fileName,
-                    textSpan: ts.createTextSpanFromBounds(start, end),
-                    kind: HighlightSpanKind.none
-                };
-            }
-            function getSemanticDocumentHighlights(node) {
-                if (node.kind === 69 ||
-                    node.kind === 97 ||
-                    node.kind === 165 ||
-                    node.kind === 95 ||
-                    node.kind === 9 ||
-                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                    var referencedSymbols = getReferencedSymbolsForNode(node, sourceFilesToSearch, false, false);
-                    return convertReferencedSymbols(referencedSymbols);
-                }
-                return undefined;
-                function convertReferencedSymbols(referencedSymbols) {
-                    if (!referencedSymbols) {
-                        return undefined;
-                    }
-                    var fileNameToDocumentHighlights = {};
-                    var result = [];
-                    for (var _i = 0, referencedSymbols_1 = referencedSymbols; _i < referencedSymbols_1.length; _i++) {
-                        var referencedSymbol = referencedSymbols_1[_i];
-                        for (var _a = 0, _b = referencedSymbol.references; _a < _b.length; _a++) {
-                            var referenceEntry = _b[_a];
-                            var fileName_1 = referenceEntry.fileName;
-                            var documentHighlights = ts.getProperty(fileNameToDocumentHighlights, fileName_1);
-                            if (!documentHighlights) {
-                                documentHighlights = { fileName: fileName_1, highlightSpans: [] };
-                                fileNameToDocumentHighlights[fileName_1] = documentHighlights;
-                                result.push(documentHighlights);
-                            }
-                            documentHighlights.highlightSpans.push({
-                                textSpan: referenceEntry.textSpan,
-                                kind: referenceEntry.isWriteAccess ? HighlightSpanKind.writtenReference : HighlightSpanKind.reference
-                            });
-                        }
-                    }
-                    return result;
-                }
-            }
-            function getSyntacticDocumentHighlights(node) {
-                var fileName = sourceFile.fileName;
-                var highlightSpans = getHighlightSpans(node);
-                if (!highlightSpans || highlightSpans.length === 0) {
-                    return undefined;
-                }
-                return [{ fileName: fileName, highlightSpans: highlightSpans }];
-                function hasKind(node, kind) {
-                    return node !== undefined && node.kind === kind;
-                }
-                function parent(node) {
-                    return node && node.parent;
-                }
-                function getHighlightSpans(node) {
-                    if (node) {
-                        switch (node.kind) {
-                            case 88:
-                            case 80:
-                                if (hasKind(node.parent, 203)) {
-                                    return getIfElseOccurrences(node.parent);
-                                }
-                                break;
-                            case 94:
-                                if (hasKind(node.parent, 211)) {
-                                    return getReturnOccurrences(node.parent);
-                                }
-                                break;
-                            case 98:
-                                if (hasKind(node.parent, 215)) {
-                                    return getThrowOccurrences(node.parent);
-                                }
-                                break;
-                            case 72:
-                                if (hasKind(parent(parent(node)), 216)) {
-                                    return getTryCatchFinallyOccurrences(node.parent.parent);
-                                }
-                                break;
-                            case 100:
-                            case 85:
-                                if (hasKind(parent(node), 216)) {
-                                    return getTryCatchFinallyOccurrences(node.parent);
-                                }
-                                break;
-                            case 96:
-                                if (hasKind(node.parent, 213)) {
-                                    return getSwitchCaseDefaultOccurrences(node.parent);
-                                }
-                                break;
-                            case 71:
-                            case 77:
-                                if (hasKind(parent(parent(parent(node))), 213)) {
-                                    return getSwitchCaseDefaultOccurrences(node.parent.parent.parent);
-                                }
-                                break;
-                            case 70:
-                            case 75:
-                                if (hasKind(node.parent, 210) || hasKind(node.parent, 209)) {
-                                    return getBreakOrContinueStatementOccurrences(node.parent);
-                                }
-                                break;
-                            case 86:
-                                if (hasKind(node.parent, 206) ||
-                                    hasKind(node.parent, 207) ||
-                                    hasKind(node.parent, 208)) {
-                                    return getLoopBreakContinueOccurrences(node.parent);
-                                }
-                                break;
-                            case 104:
-                            case 79:
-                                if (hasKind(node.parent, 205) || hasKind(node.parent, 204)) {
-                                    return getLoopBreakContinueOccurrences(node.parent);
-                                }
-                                break;
-                            case 121:
-                                if (hasKind(node.parent, 148)) {
-                                    return getConstructorOccurrences(node.parent);
-                                }
-                                break;
-                            case 123:
-                            case 131:
-                                if (hasKind(node.parent, 149) || hasKind(node.parent, 150)) {
-                                    return getGetAndSetOccurrences(node.parent);
-                                }
-                                break;
-                            default:
-                                if (ts.isModifierKind(node.kind) && node.parent &&
-                                    (ts.isDeclaration(node.parent) || node.parent.kind === 200)) {
-                                    return getModifierOccurrences(node.kind, node.parent);
-                                }
-                        }
-                    }
-                    return undefined;
-                }
-                function aggregateOwnedThrowStatements(node) {
-                    var statementAccumulator = [];
-                    aggregate(node);
-                    return statementAccumulator;
-                    function aggregate(node) {
-                        if (node.kind === 215) {
-                            statementAccumulator.push(node);
-                        }
-                        else if (node.kind === 216) {
-                            var tryStatement = node;
-                            if (tryStatement.catchClause) {
-                                aggregate(tryStatement.catchClause);
-                            }
-                            else {
-                                aggregate(tryStatement.tryBlock);
-                            }
-                            if (tryStatement.finallyBlock) {
-                                aggregate(tryStatement.finallyBlock);
-                            }
-                        }
-                        else if (!ts.isFunctionLike(node)) {
-                            ts.forEachChild(node, aggregate);
-                        }
-                    }
-                }
-                function getThrowStatementOwner(throwStatement) {
-                    var child = throwStatement;
-                    while (child.parent) {
-                        var parent_19 = child.parent;
-                        if (ts.isFunctionBlock(parent_19) || parent_19.kind === 256) {
-                            return parent_19;
-                        }
-                        if (parent_19.kind === 216) {
-                            var tryStatement = parent_19;
-                            if (tryStatement.tryBlock === child && tryStatement.catchClause) {
-                                return child;
-                            }
-                        }
-                        child = parent_19;
-                    }
-                    return undefined;
-                }
-                function aggregateAllBreakAndContinueStatements(node) {
-                    var statementAccumulator = [];
-                    aggregate(node);
-                    return statementAccumulator;
-                    function aggregate(node) {
-                        if (node.kind === 210 || node.kind === 209) {
-                            statementAccumulator.push(node);
-                        }
-                        else if (!ts.isFunctionLike(node)) {
-                            ts.forEachChild(node, aggregate);
-                        }
-                    }
-                }
-                function ownsBreakOrContinueStatement(owner, statement) {
-                    var actualOwner = getBreakOrContinueOwner(statement);
-                    return actualOwner && actualOwner === owner;
-                }
-                function getBreakOrContinueOwner(statement) {
-                    for (var node_1 = statement.parent; node_1; node_1 = node_1.parent) {
-                        switch (node_1.kind) {
-                            case 213:
-                                if (statement.kind === 209) {
-                                    continue;
-                                }
-                            case 206:
-                            case 207:
-                            case 208:
-                            case 205:
-                            case 204:
-                                if (!statement.label || isLabeledBy(node_1, statement.label.text)) {
-                                    return node_1;
-                                }
-                                break;
-                            default:
-                                if (ts.isFunctionLike(node_1)) {
-                                    return undefined;
-                                }
-                                break;
-                        }
-                    }
-                    return undefined;
-                }
-                function getModifierOccurrences(modifier, declaration) {
-                    var container = declaration.parent;
-                    if (ts.isAccessibilityModifier(modifier)) {
-                        if (!(container.kind === 221 ||
-                            container.kind === 192 ||
-                            (declaration.kind === 142 && hasKind(container, 148)))) {
-                            return undefined;
-                        }
-                    }
-                    else if (modifier === 113) {
-                        if (!(container.kind === 221 || container.kind === 192)) {
-                            return undefined;
-                        }
-                    }
-                    else if (modifier === 82 || modifier === 122) {
-                        if (!(container.kind === 226 || container.kind === 256)) {
-                            return undefined;
-                        }
-                    }
-                    else if (modifier === 115) {
-                        if (!(container.kind === 221 || declaration.kind === 221)) {
-                            return undefined;
-                        }
-                    }
-                    else {
-                        return undefined;
-                    }
-                    var keywords = [];
-                    var modifierFlag = getFlagFromModifier(modifier);
-                    var nodes;
-                    switch (container.kind) {
-                        case 226:
-                        case 256:
-                            if (modifierFlag & 128) {
-                                nodes = declaration.members.concat(declaration);
-                            }
-                            else {
-                                nodes = container.statements;
-                            }
-                            break;
-                        case 148:
-                            nodes = container.parameters.concat(container.parent.members);
-                            break;
-                        case 221:
-                        case 192:
-                            nodes = container.members;
-                            if (modifierFlag & 28) {
-                                var constructor = ts.forEach(container.members, function (member) {
-                                    return member.kind === 148 && member;
-                                });
-                                if (constructor) {
-                                    nodes = nodes.concat(constructor.parameters);
-                                }
-                            }
-                            else if (modifierFlag & 128) {
-                                nodes = nodes.concat(container);
-                            }
-                            break;
-                        default:
-                            ts.Debug.fail("Invalid container kind.");
-                    }
-                    ts.forEach(nodes, function (node) {
-                        if (node.modifiers && node.flags & modifierFlag) {
-                            ts.forEach(node.modifiers, function (child) { return pushKeywordIf(keywords, child, modifier); });
-                        }
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                    function getFlagFromModifier(modifier) {
-                        switch (modifier) {
-                            case 112:
-                                return 4;
-                            case 110:
-                                return 8;
-                            case 111:
-                                return 16;
-                            case 113:
-                                return 32;
-                            case 82:
-                                return 1;
-                            case 122:
-                                return 2;
-                            case 115:
-                                return 128;
-                            default:
-                                ts.Debug.fail();
-                        }
-                    }
-                }
-                function pushKeywordIf(keywordList, token) {
-                    var expected = [];
-                    for (var _i = 2; _i < arguments.length; _i++) {
-                        expected[_i - 2] = arguments[_i];
-                    }
-                    if (token && ts.contains(expected, token.kind)) {
-                        keywordList.push(token);
-                        return true;
-                    }
-                    return false;
-                }
-                function getGetAndSetOccurrences(accessorDeclaration) {
-                    var keywords = [];
-                    tryPushAccessorKeyword(accessorDeclaration.symbol, 149);
-                    tryPushAccessorKeyword(accessorDeclaration.symbol, 150);
-                    return ts.map(keywords, getHighlightSpanForNode);
-                    function tryPushAccessorKeyword(accessorSymbol, accessorKind) {
-                        var accessor = ts.getDeclarationOfKind(accessorSymbol, accessorKind);
-                        if (accessor) {
-                            ts.forEach(accessor.getChildren(), function (child) { return pushKeywordIf(keywords, child, 123, 131); });
-                        }
-                    }
-                }
-                function getConstructorOccurrences(constructorDeclaration) {
-                    var declarations = constructorDeclaration.symbol.getDeclarations();
-                    var keywords = [];
-                    ts.forEach(declarations, function (declaration) {
-                        ts.forEach(declaration.getChildren(), function (token) {
-                            return pushKeywordIf(keywords, token, 121);
-                        });
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getLoopBreakContinueOccurrences(loopNode) {
-                    var keywords = [];
-                    if (pushKeywordIf(keywords, loopNode.getFirstToken(), 86, 104, 79)) {
-                        if (loopNode.kind === 204) {
-                            var loopTokens = loopNode.getChildren();
-                            for (var i = loopTokens.length - 1; i >= 0; i--) {
-                                if (pushKeywordIf(keywords, loopTokens[i], 104)) {
-                                    break;
-                                }
-                            }
-                        }
-                    }
-                    var breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
-                    ts.forEach(breaksAndContinues, function (statement) {
-                        if (ownsBreakOrContinueStatement(loopNode, statement)) {
-                            pushKeywordIf(keywords, statement.getFirstToken(), 70, 75);
-                        }
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getBreakOrContinueStatementOccurrences(breakOrContinueStatement) {
-                    var owner = getBreakOrContinueOwner(breakOrContinueStatement);
-                    if (owner) {
-                        switch (owner.kind) {
-                            case 206:
-                            case 207:
-                            case 208:
-                            case 204:
-                            case 205:
-                                return getLoopBreakContinueOccurrences(owner);
-                            case 213:
-                                return getSwitchCaseDefaultOccurrences(owner);
-                        }
-                    }
-                    return undefined;
-                }
-                function getSwitchCaseDefaultOccurrences(switchStatement) {
-                    var keywords = [];
-                    pushKeywordIf(keywords, switchStatement.getFirstToken(), 96);
-                    ts.forEach(switchStatement.caseBlock.clauses, function (clause) {
-                        pushKeywordIf(keywords, clause.getFirstToken(), 71, 77);
-                        var breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
-                        ts.forEach(breaksAndContinues, function (statement) {
-                            if (ownsBreakOrContinueStatement(switchStatement, statement)) {
-                                pushKeywordIf(keywords, statement.getFirstToken(), 70);
-                            }
-                        });
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getTryCatchFinallyOccurrences(tryStatement) {
-                    var keywords = [];
-                    pushKeywordIf(keywords, tryStatement.getFirstToken(), 100);
-                    if (tryStatement.catchClause) {
-                        pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), 72);
-                    }
-                    if (tryStatement.finallyBlock) {
-                        var finallyKeyword = ts.findChildOfKind(tryStatement, 85, sourceFile);
-                        pushKeywordIf(keywords, finallyKeyword, 85);
-                    }
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getThrowOccurrences(throwStatement) {
-                    var owner = getThrowStatementOwner(throwStatement);
-                    if (!owner) {
-                        return undefined;
-                    }
-                    var keywords = [];
-                    ts.forEach(aggregateOwnedThrowStatements(owner), function (throwStatement) {
-                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98);
-                    });
-                    if (ts.isFunctionBlock(owner)) {
-                        ts.forEachReturnStatement(owner, function (returnStatement) {
-                            pushKeywordIf(keywords, returnStatement.getFirstToken(), 94);
-                        });
-                    }
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getReturnOccurrences(returnStatement) {
-                    var func = ts.getContainingFunction(returnStatement);
-                    if (!(func && hasKind(func.body, 199))) {
-                        return undefined;
-                    }
-                    var keywords = [];
-                    ts.forEachReturnStatement(func.body, function (returnStatement) {
-                        pushKeywordIf(keywords, returnStatement.getFirstToken(), 94);
-                    });
-                    ts.forEach(aggregateOwnedThrowStatements(func.body), function (throwStatement) {
-                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98);
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getIfElseOccurrences(ifStatement) {
-                    var keywords = [];
-                    while (hasKind(ifStatement.parent, 203) && ifStatement.parent.elseStatement === ifStatement) {
-                        ifStatement = ifStatement.parent;
-                    }
-                    while (ifStatement) {
-                        var children = ifStatement.getChildren();
-                        pushKeywordIf(keywords, children[0], 88);
-                        for (var i = children.length - 1; i >= 0; i--) {
-                            if (pushKeywordIf(keywords, children[i], 80)) {
-                                break;
-                            }
-                        }
-                        if (!hasKind(ifStatement.elseStatement, 203)) {
-                            break;
-                        }
-                        ifStatement = ifStatement.elseStatement;
-                    }
-                    var result = [];
-                    for (var i = 0; i < keywords.length; i++) {
-                        if (keywords[i].kind === 80 && i < keywords.length - 1) {
-                            var elseKeyword = keywords[i];
-                            var ifKeyword = keywords[i + 1];
-                            var shouldCombindElseAndIf = true;
-                            for (var j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
-                                if (!ts.isWhiteSpace(sourceFile.text.charCodeAt(j))) {
-                                    shouldCombindElseAndIf = false;
-                                    break;
-                                }
-                            }
-                            if (shouldCombindElseAndIf) {
-                                result.push({
-                                    fileName: fileName,
-                                    textSpan: ts.createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
-                                    kind: HighlightSpanKind.reference
-                                });
-                                i++;
-                                continue;
-                            }
-                        }
-                        result.push(getHighlightSpanForNode(keywords[i]));
-                    }
-                    return result;
-                }
-            }
-        }
-        function getOccurrencesAtPositionCore(fileName, position) {
-            synchronizeHostData();
-            return convertDocumentHighlights(getDocumentHighlights(fileName, position, [fileName]));
-            function convertDocumentHighlights(documentHighlights) {
-                if (!documentHighlights) {
-                    return undefined;
-                }
-                var result = [];
-                for (var _i = 0, documentHighlights_1 = documentHighlights; _i < documentHighlights_1.length; _i++) {
-                    var entry = documentHighlights_1[_i];
-                    for (var _a = 0, _b = entry.highlightSpans; _a < _b.length; _a++) {
-                        var highlightSpan = _b[_a];
-                        result.push({
-                            fileName: entry.fileName,
-                            textSpan: highlightSpan.textSpan,
-                            isWriteAccess: highlightSpan.kind === HighlightSpanKind.writtenReference
-                        });
-                    }
-                }
-                return result;
-            }
-        }
-        function convertReferences(referenceSymbols) {
-            if (!referenceSymbols) {
-                return undefined;
-            }
-            var referenceEntries = [];
-            for (var _i = 0, referenceSymbols_1 = referenceSymbols; _i < referenceSymbols_1.length; _i++) {
-                var referenceSymbol = referenceSymbols_1[_i];
-                ts.addRange(referenceEntries, referenceSymbol.references);
-            }
-            return referenceEntries;
-        }
-        function findRenameLocations(fileName, position, findInStrings, findInComments) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, findInStrings, findInComments);
-            return convertReferences(referencedSymbols);
-        }
-        function getReferencesAtPosition(fileName, position) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, false, false);
-            return convertReferences(referencedSymbols);
-        }
-        function findReferences(fileName, position) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, false, false);
-            return ts.filter(referencedSymbols, function (rs) { return !!rs.definition; });
-        }
-        function findReferencedSymbols(fileName, position, findInStrings, findInComments) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            if (node.kind !== 69 &&
-                node.kind !== 9 &&
-                !isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                return undefined;
-            }
-            ts.Debug.assert(node.kind === 69 || node.kind === 8 || node.kind === 9);
-            return getReferencedSymbolsForNode(node, program.getSourceFiles(), findInStrings, findInComments);
-        }
-        function getReferencedSymbolsForNode(node, sourceFiles, findInStrings, findInComments) {
-            var typeChecker = program.getTypeChecker();
-            if (isLabelName(node)) {
-                if (isJumpStatementTarget(node)) {
-                    var labelDefinition = getTargetLabel(node.parent, node.text);
-                    return labelDefinition ? getLabelReferencesInNode(labelDefinition.parent, labelDefinition) : undefined;
-                }
-                else {
-                    return getLabelReferencesInNode(node.parent, node);
-                }
-            }
-            if (node.kind === 97 || node.kind === 165) {
-                return getReferencesForThisKeyword(node, sourceFiles);
-            }
-            if (node.kind === 95) {
-                return getReferencesForSuperKeyword(node);
-            }
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol && node.kind === 9) {
-                return getReferencesForStringLiteral(node, sourceFiles);
-            }
-            if (!symbol) {
-                return undefined;
-            }
-            var declarations = symbol.declarations;
-            if (!declarations || !declarations.length) {
-                return undefined;
-            }
-            var result;
-            var searchMeaning = getIntersectingMeaningFromDeclarations(getMeaningFromLocation(node), declarations);
-            var declaredName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
-            var scope = getSymbolScope(symbol);
-            var symbolToIndex = [];
-            if (scope) {
-                result = [];
-                getReferencesInNode(scope, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
-            }
-            else {
-                var internedName = getInternedName(symbol, node, declarations);
-                for (var _i = 0, sourceFiles_4 = sourceFiles; _i < sourceFiles_4.length; _i++) {
-                    var sourceFile = sourceFiles_4[_i];
-                    cancellationToken.throwIfCancellationRequested();
-                    var nameTable = getNameTable(sourceFile);
-                    if (ts.lookUp(nameTable, internedName) !== undefined) {
-                        result = result || [];
-                        getReferencesInNode(sourceFile, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
-                    }
-                }
-            }
-            return result;
-            function getDefinition(symbol) {
-                var info = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, node.getSourceFile(), getContainerNode(node), node);
-                var name = ts.map(info.displayParts, function (p) { return p.text; }).join("");
-                var declarations = symbol.declarations;
-                if (!declarations || declarations.length === 0) {
-                    return undefined;
-                }
-                return {
-                    containerKind: "",
-                    containerName: "",
-                    name: name,
-                    kind: info.symbolKind,
-                    fileName: declarations[0].getSourceFile().fileName,
-                    textSpan: ts.createTextSpan(declarations[0].getStart(), 0)
-                };
-            }
-            function getAliasSymbolForPropertyNameSymbol(symbol, location) {
-                if (symbol.flags & 8388608) {
-                    var defaultImport = ts.getDeclarationOfKind(symbol, 231);
-                    if (defaultImport) {
-                        return typeChecker.getAliasedSymbol(symbol);
-                    }
-                    var importOrExportSpecifier = ts.forEach(symbol.declarations, function (declaration) { return (declaration.kind === 234 ||
-                        declaration.kind === 238) ? declaration : undefined; });
-                    if (importOrExportSpecifier &&
-                        (!importOrExportSpecifier.propertyName ||
-                            importOrExportSpecifier.propertyName === location)) {
-                        return importOrExportSpecifier.kind === 234 ?
-                            typeChecker.getAliasedSymbol(symbol) :
-                            typeChecker.getExportSpecifierLocalTargetSymbol(importOrExportSpecifier);
-                    }
-                }
-                return undefined;
-            }
-            function getPropertySymbolOfDestructuringAssignment(location) {
-                return ts.isArrayLiteralOrObjectLiteralDestructuringPattern(location.parent.parent) &&
-                    typeChecker.getPropertySymbolOfDestructuringAssignment(location);
-            }
-            function isObjectBindingPatternElementWithoutPropertyName(symbol) {
-                var bindingElement = ts.getDeclarationOfKind(symbol, 169);
-                return bindingElement &&
-                    bindingElement.parent.kind === 167 &&
-                    !bindingElement.propertyName;
-            }
-            function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol) {
-                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
-                    var bindingElement = ts.getDeclarationOfKind(symbol, 169);
-                    var typeOfPattern = typeChecker.getTypeAtLocation(bindingElement.parent);
-                    return typeOfPattern && typeChecker.getPropertyOfType(typeOfPattern, bindingElement.name.text);
-                }
-                return undefined;
-            }
-            function getInternedName(symbol, location, declarations) {
-                if (ts.isImportOrExportSpecifierName(location)) {
-                    return location.getText();
-                }
-                var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
-                symbol = localExportDefaultSymbol || symbol;
-                return ts.stripQuotes(symbol.name);
-            }
-            function getSymbolScope(symbol) {
-                var valueDeclaration = symbol.valueDeclaration;
-                if (valueDeclaration && (valueDeclaration.kind === 179 || valueDeclaration.kind === 192)) {
-                    return valueDeclaration;
-                }
-                if (symbol.flags & (4 | 8192)) {
-                    var privateDeclaration = ts.forEach(symbol.getDeclarations(), function (d) { return (d.flags & 8) ? d : undefined; });
-                    if (privateDeclaration) {
-                        return ts.getAncestor(privateDeclaration, 221);
-                    }
-                }
-                if (symbol.flags & 8388608) {
-                    return undefined;
-                }
-                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
-                    return undefined;
-                }
-                if (symbol.parent || (symbol.flags & 268435456)) {
-                    return undefined;
-                }
-                var scope;
-                var declarations = symbol.getDeclarations();
-                if (declarations) {
-                    for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
-                        var declaration = declarations_9[_i];
-                        var container = getContainerNode(declaration);
-                        if (!container) {
-                            return undefined;
-                        }
-                        if (scope && scope !== container) {
-                            return undefined;
-                        }
-                        if (container.kind === 256 && !ts.isExternalModule(container)) {
-                            return undefined;
-                        }
-                        scope = container;
-                    }
-                }
-                return scope;
-            }
-            function getPossibleSymbolReferencePositions(sourceFile, symbolName, start, end) {
-                var positions = [];
-                if (!symbolName || !symbolName.length) {
-                    return positions;
-                }
-                var text = sourceFile.text;
-                var sourceLength = text.length;
-                var symbolNameLength = symbolName.length;
-                var position = text.indexOf(symbolName, start);
-                while (position >= 0) {
-                    cancellationToken.throwIfCancellationRequested();
-                    if (position > end)
-                        break;
-                    var endPosition = position + symbolNameLength;
-                    if ((position === 0 || !ts.isIdentifierPart(text.charCodeAt(position - 1), 2)) &&
-                        (endPosition === sourceLength || !ts.isIdentifierPart(text.charCodeAt(endPosition), 2))) {
-                        positions.push(position);
-                    }
-                    position = text.indexOf(symbolName, position + symbolNameLength + 1);
-                }
-                return positions;
-            }
-            function getLabelReferencesInNode(container, targetLabel) {
-                var references = [];
-                var sourceFile = container.getSourceFile();
-                var labelName = targetLabel.text;
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container.getStart(), container.getEnd());
-                ts.forEach(possiblePositions, function (position) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var node = ts.getTouchingWord(sourceFile, position);
-                    if (!node || node.getWidth() !== labelName.length) {
-                        return;
-                    }
-                    if (node === targetLabel ||
-                        (isJumpStatementTarget(node) && getTargetLabel(node, labelName) === targetLabel)) {
-                        references.push(getReferenceEntryFromNode(node));
-                    }
-                });
-                var definition = {
-                    containerKind: "",
-                    containerName: "",
-                    fileName: targetLabel.getSourceFile().fileName,
-                    kind: ScriptElementKind.label,
-                    name: labelName,
-                    textSpan: ts.createTextSpanFromBounds(targetLabel.getStart(), targetLabel.getEnd())
-                };
-                return [{ definition: definition, references: references }];
-            }
-            function isValidReferencePosition(node, searchSymbolName) {
-                if (node) {
-                    switch (node.kind) {
-                        case 69:
-                            return node.getWidth() === searchSymbolName.length;
-                        case 9:
-                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
-                                isNameOfExternalModuleImportOrDeclaration(node)) {
-                                return node.getWidth() === searchSymbolName.length + 2;
-                            }
-                            break;
-                        case 8:
-                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                                return node.getWidth() === searchSymbolName.length;
-                            }
-                            break;
-                    }
-                }
-                return false;
-            }
-            function getReferencesInNode(container, searchSymbol, searchText, searchLocation, searchMeaning, findInStrings, findInComments, result, symbolToIndex) {
-                var sourceFile = container.getSourceFile();
-                var tripleSlashDirectivePrefixRegex = /^\/\/\/\s*</;
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, container.getStart(), container.getEnd());
-                if (possiblePositions.length) {
-                    var searchSymbols_1 = populateSearchSymbolSet(searchSymbol, searchLocation);
-                    ts.forEach(possiblePositions, function (position) {
-                        cancellationToken.throwIfCancellationRequested();
-                        var referenceLocation = ts.getTouchingPropertyName(sourceFile, position);
-                        if (!isValidReferencePosition(referenceLocation, searchText)) {
-                            if ((findInStrings && ts.isInString(sourceFile, position)) ||
-                                (findInComments && isInNonReferenceComment(sourceFile, position))) {
-                                result.push({
-                                    definition: undefined,
-                                    references: [{
-                                            fileName: sourceFile.fileName,
-                                            textSpan: ts.createTextSpan(position, searchText.length),
-                                            isWriteAccess: false
-                                        }]
-                                });
-                            }
-                            return;
-                        }
-                        if (!(getMeaningFromLocation(referenceLocation) & searchMeaning)) {
-                            return;
-                        }
-                        var referenceSymbol = typeChecker.getSymbolAtLocation(referenceLocation);
-                        if (referenceSymbol) {
-                            var referenceSymbolDeclaration = referenceSymbol.valueDeclaration;
-                            var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(referenceSymbolDeclaration);
-                            var relatedSymbol = getRelatedSymbol(searchSymbols_1, referenceSymbol, referenceLocation);
-                            if (relatedSymbol) {
-                                var referencedSymbol = getReferencedSymbol(relatedSymbol);
-                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceLocation));
-                            }
-                            else if (!(referenceSymbol.flags & 67108864) && searchSymbols_1.indexOf(shorthandValueSymbol) >= 0) {
-                                var referencedSymbol = getReferencedSymbol(shorthandValueSymbol);
-                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceSymbolDeclaration.name));
-                            }
-                        }
-                    });
-                }
-                return;
-                function getReferencedSymbol(symbol) {
-                    var symbolId = ts.getSymbolId(symbol);
-                    var index = symbolToIndex[symbolId];
-                    if (index === undefined) {
-                        index = result.length;
-                        symbolToIndex[symbolId] = index;
-                        result.push({
-                            definition: getDefinition(symbol),
-                            references: []
-                        });
-                    }
-                    return result[index];
-                }
-                function isInNonReferenceComment(sourceFile, position) {
-                    return ts.isInCommentHelper(sourceFile, position, isNonReferenceComment);
-                    function isNonReferenceComment(c) {
-                        var commentText = sourceFile.text.substring(c.pos, c.end);
-                        return !tripleSlashDirectivePrefixRegex.test(commentText);
-                    }
-                }
-            }
-            function getReferencesForSuperKeyword(superKeyword) {
-                var searchSpaceNode = ts.getSuperContainer(superKeyword, false);
-                if (!searchSpaceNode) {
-                    return undefined;
-                }
-                var staticFlag = 32;
-                switch (searchSpaceNode.kind) {
-                    case 145:
-                    case 144:
-                    case 147:
-                    case 146:
-                    case 148:
-                    case 149:
-                    case 150:
-                        staticFlag &= searchSpaceNode.flags;
-                        searchSpaceNode = searchSpaceNode.parent;
-                        break;
-                    default:
-                        return undefined;
-                }
-                var references = [];
-                var sourceFile = searchSpaceNode.getSourceFile();
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
-                ts.forEach(possiblePositions, function (position) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var node = ts.getTouchingWord(sourceFile, position);
-                    if (!node || node.kind !== 95) {
-                        return;
-                    }
-                    var container = ts.getSuperContainer(node, false);
-                    if (container && (32 & container.flags) === staticFlag && container.parent.symbol === searchSpaceNode.symbol) {
-                        references.push(getReferenceEntryFromNode(node));
-                    }
-                });
-                var definition = getDefinition(searchSpaceNode.symbol);
-                return [{ definition: definition, references: references }];
-            }
-            function getReferencesForThisKeyword(thisOrSuperKeyword, sourceFiles) {
-                var searchSpaceNode = ts.getThisContainer(thisOrSuperKeyword, false);
-                var staticFlag = 32;
-                switch (searchSpaceNode.kind) {
-                    case 147:
-                    case 146:
-                        if (ts.isObjectLiteralMethod(searchSpaceNode)) {
-                            break;
-                        }
-                    case 145:
-                    case 144:
-                    case 148:
-                    case 149:
-                    case 150:
-                        staticFlag &= searchSpaceNode.flags;
-                        searchSpaceNode = searchSpaceNode.parent;
-                        break;
-                    case 256:
-                        if (ts.isExternalModule(searchSpaceNode)) {
-                            return undefined;
-                        }
-                    case 220:
-                    case 179:
-                        break;
-                    default:
-                        return undefined;
-                }
-                var references = [];
-                var possiblePositions;
-                if (searchSpaceNode.kind === 256) {
-                    ts.forEach(sourceFiles, function (sourceFile) {
-                        possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", sourceFile.getStart(), sourceFile.getEnd());
-                        getThisReferencesInFile(sourceFile, sourceFile, possiblePositions, references);
-                    });
-                }
-                else {
-                    var sourceFile = searchSpaceNode.getSourceFile();
-                    possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
-                    getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, references);
-                }
-                return [{
-                        definition: {
-                            containerKind: "",
-                            containerName: "",
-                            fileName: node.getSourceFile().fileName,
-                            kind: ScriptElementKind.variableElement,
-                            name: "this",
-                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
-                        },
-                        references: references
-                    }];
-                function getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, result) {
-                    ts.forEach(possiblePositions, function (position) {
-                        cancellationToken.throwIfCancellationRequested();
-                        var node = ts.getTouchingWord(sourceFile, position);
-                        if (!node || (node.kind !== 97 && node.kind !== 165)) {
-                            return;
-                        }
-                        var container = ts.getThisContainer(node, false);
-                        switch (searchSpaceNode.kind) {
-                            case 179:
-                            case 220:
-                                if (searchSpaceNode.symbol === container.symbol) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                            case 147:
-                            case 146:
-                                if (ts.isObjectLiteralMethod(searchSpaceNode) && searchSpaceNode.symbol === container.symbol) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                            case 192:
-                            case 221:
-                                if (container.parent && searchSpaceNode.symbol === container.parent.symbol && (container.flags & 32) === staticFlag) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                            case 256:
-                                if (container.kind === 256 && !ts.isExternalModule(container)) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                        }
-                    });
-                }
-            }
-            function getReferencesForStringLiteral(node, sourceFiles) {
-                var typeChecker = program.getTypeChecker();
-                var type = getStringLiteralTypeForNode(node, typeChecker);
-                if (!type) {
-                    return undefined;
-                }
-                var references = [];
-                for (var _i = 0, sourceFiles_5 = sourceFiles; _i < sourceFiles_5.length; _i++) {
-                    var sourceFile = sourceFiles_5[_i];
-                    var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, type.text, sourceFile.getStart(), sourceFile.getEnd());
-                    getReferencesForStringLiteralInFile(sourceFile, type, possiblePositions, references);
-                }
-                return [{
-                        definition: {
-                            containerKind: "",
-                            containerName: "",
-                            fileName: node.getSourceFile().fileName,
-                            kind: ScriptElementKind.variableElement,
-                            name: type.text,
-                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
-                        },
-                        references: references
-                    }];
-                function getReferencesForStringLiteralInFile(sourceFile, searchType, possiblePositions, references) {
-                    for (var _i = 0, possiblePositions_1 = possiblePositions; _i < possiblePositions_1.length; _i++) {
-                        var position = possiblePositions_1[_i];
-                        cancellationToken.throwIfCancellationRequested();
-                        var node_2 = ts.getTouchingWord(sourceFile, position);
-                        if (!node_2 || node_2.kind !== 9) {
-                            return;
-                        }
-                        var type_1 = getStringLiteralTypeForNode(node_2, typeChecker);
-                        if (type_1 === searchType) {
-                            references.push(getReferenceEntryFromNode(node_2));
-                        }
-                    }
-                }
-            }
-            function populateSearchSymbolSet(symbol, location) {
-                var result = [symbol];
-                var containingObjectLiteralElement = getContainingObjectLiteralElement(location);
-                if (containingObjectLiteralElement && containingObjectLiteralElement.kind !== 254) {
-                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(location);
-                    if (propertySymbol) {
-                        result.push(propertySymbol);
-                    }
-                }
-                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(symbol, location);
-                if (aliasSymbol) {
-                    result = result.concat(populateSearchSymbolSet(aliasSymbol, location));
-                }
-                if (containingObjectLiteralElement) {
-                    ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
-                        ts.addRange(result, typeChecker.getRootSymbols(contextualSymbol));
-                    });
-                    var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(location.parent);
-                    if (shorthandValueSymbol) {
-                        result.push(shorthandValueSymbol);
-                    }
-                }
-                if (symbol.valueDeclaration && symbol.valueDeclaration.kind === 142 &&
-                    ts.isParameterPropertyDeclaration(symbol.valueDeclaration)) {
-                    result = result.concat(typeChecker.getSymbolsOfParameterPropertyDeclaration(symbol.valueDeclaration, symbol.name));
-                }
-                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol);
-                if (bindingElementPropertySymbol) {
-                    result.push(bindingElementPropertySymbol);
-                }
-                ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
-                    if (rootSymbol !== symbol) {
-                        result.push(rootSymbol);
-                    }
-                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 | 64)) {
-                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, {});
-                    }
-                });
-                return result;
-            }
-            function getPropertySymbolsFromBaseTypes(symbol, propertyName, result, previousIterationSymbolsCache) {
-                if (!symbol) {
-                    return;
-                }
-                if (ts.hasProperty(previousIterationSymbolsCache, symbol.name)) {
-                    return;
-                }
-                if (symbol.flags & (32 | 64)) {
-                    ts.forEach(symbol.getDeclarations(), function (declaration) {
-                        if (ts.isClassLike(declaration)) {
-                            getPropertySymbolFromTypeReference(ts.getClassExtendsHeritageClauseElement(declaration));
-                            ts.forEach(ts.getClassImplementsHeritageClauseElements(declaration), getPropertySymbolFromTypeReference);
-                        }
-                        else if (declaration.kind === 222) {
-                            ts.forEach(ts.getInterfaceBaseTypeNodes(declaration), getPropertySymbolFromTypeReference);
-                        }
-                    });
-                }
-                return;
-                function getPropertySymbolFromTypeReference(typeReference) {
-                    if (typeReference) {
-                        var type = typeChecker.getTypeAtLocation(typeReference);
-                        if (type) {
-                            var propertySymbol = typeChecker.getPropertyOfType(type, propertyName);
-                            if (propertySymbol) {
-                                result.push.apply(result, typeChecker.getRootSymbols(propertySymbol));
-                            }
-                            previousIterationSymbolsCache[symbol.name] = symbol;
-                            getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache);
-                        }
-                    }
-                }
-            }
-            function getRelatedSymbol(searchSymbols, referenceSymbol, referenceLocation) {
-                if (searchSymbols.indexOf(referenceSymbol) >= 0) {
-                    return referenceSymbol;
-                }
-                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(referenceSymbol, referenceLocation);
-                if (aliasSymbol) {
-                    return getRelatedSymbol(searchSymbols, aliasSymbol, referenceLocation);
-                }
-                var containingObjectLiteralElement = getContainingObjectLiteralElement(referenceLocation);
-                if (containingObjectLiteralElement) {
-                    var contextualSymbol = ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
-                        return ts.forEach(typeChecker.getRootSymbols(contextualSymbol), function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
-                    });
-                    if (contextualSymbol) {
-                        return contextualSymbol;
-                    }
-                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation);
-                    if (propertySymbol && searchSymbols.indexOf(propertySymbol) >= 0) {
-                        return propertySymbol;
-                    }
-                }
-                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol);
-                if (bindingElementPropertySymbol && searchSymbols.indexOf(bindingElementPropertySymbol) >= 0) {
-                    return bindingElementPropertySymbol;
-                }
-                return ts.forEach(typeChecker.getRootSymbols(referenceSymbol), function (rootSymbol) {
-                    if (searchSymbols.indexOf(rootSymbol) >= 0) {
-                        return rootSymbol;
-                    }
-                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 | 64)) {
-                        var result_4 = [];
-                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result_4, {});
-                        return ts.forEach(result_4, function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
-                    }
-                    return undefined;
-                });
-            }
-            function getNameFromObjectLiteralElement(node) {
-                if (node.name.kind === 140) {
-                    var nameExpression = node.name.expression;
-                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
-                        return nameExpression.text;
-                    }
-                    return undefined;
-                }
-                return node.name.text;
-            }
-            function getPropertySymbolsFromContextualType(node) {
-                var objectLiteral = node.parent;
-                var contextualType = typeChecker.getContextualType(objectLiteral);
-                var name = getNameFromObjectLiteralElement(node);
-                if (name && contextualType) {
-                    var result_5 = [];
-                    var symbol_1 = contextualType.getProperty(name);
-                    if (symbol_1) {
-                        result_5.push(symbol_1);
-                    }
-                    if (contextualType.flags & 16384) {
-                        ts.forEach(contextualType.types, function (t) {
-                            var symbol = t.getProperty(name);
-                            if (symbol) {
-                                result_5.push(symbol);
-                            }
-                        });
-                    }
-                    return result_5;
-                }
-                return undefined;
-            }
-            function getIntersectingMeaningFromDeclarations(meaning, declarations) {
-                if (declarations) {
-                    var lastIterationMeaning = void 0;
-                    do {
-                        lastIterationMeaning = meaning;
-                        for (var _i = 0, declarations_10 = declarations; _i < declarations_10.length; _i++) {
-                            var declaration = declarations_10[_i];
-                            var declarationMeaning = getMeaningFromDeclaration(declaration);
-                            if (declarationMeaning & meaning) {
-                                meaning |= declarationMeaning;
-                            }
-                        }
-                    } while (meaning !== lastIterationMeaning);
-                }
-                return meaning;
-            }
-        }
-        function getReferenceEntryFromNode(node) {
-            var start = node.getStart();
-            var end = node.getEnd();
-            if (node.kind === 9) {
-                start += 1;
-                end -= 1;
-            }
-            return {
-                fileName: node.getSourceFile().fileName,
-                textSpan: ts.createTextSpanFromBounds(start, end),
-                isWriteAccess: isWriteAccess(node)
-            };
-        }
-        function isWriteAccess(node) {
-            if (node.kind === 69 && ts.isDeclarationName(node)) {
-                return true;
-            }
-            var parent = node.parent;
-            if (parent) {
-                if (parent.kind === 186 || parent.kind === 185) {
-                    return true;
-                }
-                else if (parent.kind === 187 && parent.left === node) {
-                    var operator = parent.operatorToken.kind;
-                    return 56 <= operator && operator <= 68;
-                }
-            }
-            return false;
-        }
-        function getNavigateToItems(searchValue, maxResultCount) {
-            synchronizeHostData();
-            var checker = getProgram().getTypeChecker();
-            return ts.NavigateTo.getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount);
-        }
-        function getEmitOutput(fileName) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var outputFiles = [];
-            function writeFile(fileName, data, writeByteOrderMark) {
-                outputFiles.push({
-                    name: fileName,
-                    writeByteOrderMark: writeByteOrderMark,
-                    text: data
-                });
-            }
-            var emitOutput = program.emit(sourceFile, writeFile, cancellationToken);
-            return {
-                outputFiles: outputFiles,
-                emitSkipped: emitOutput.emitSkipped
-            };
-        }
-        function getMeaningFromDeclaration(node) {
-            switch (node.kind) {
-                case 142:
-                case 218:
-                case 169:
-                case 145:
-                case 144:
-                case 253:
-                case 254:
-                case 255:
-                case 147:
-                case 146:
-                case 148:
-                case 149:
-                case 150:
-                case 220:
-                case 179:
-                case 180:
-                case 252:
-                    return 1;
-                case 141:
-                case 222:
-                case 223:
-                case 159:
-                    return 2;
-                case 221:
-                case 224:
-                    return 1 | 2;
-                case 225:
-                    if (ts.isAmbientModule(node)) {
-                        return 4 | 1;
-                    }
-                    else if (ts.getModuleInstanceState(node) === 1) {
-                        return 4 | 1;
-                    }
-                    else {
-                        return 4;
-                    }
-                case 233:
-                case 234:
-                case 229:
-                case 230:
-                case 235:
-                case 236:
-                    return 1 | 2 | 4;
-                case 256:
-                    return 4 | 1;
-            }
-            return 1 | 2 | 4;
-        }
-        function isTypeReference(node) {
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(node)) {
-                node = node.parent;
-            }
-            return node.parent.kind === 155 ||
-                (node.parent.kind === 194 && !ts.isExpressionWithTypeArgumentsInClassExtendsClause(node.parent)) ||
-                (node.kind === 97 && !ts.isExpression(node)) ||
-                node.kind === 165;
-        }
-        function isNamespaceReference(node) {
-            return isQualifiedNameNamespaceReference(node) || isPropertyAccessNamespaceReference(node);
-        }
-        function isPropertyAccessNamespaceReference(node) {
-            var root = node;
-            var isLastClause = true;
-            if (root.parent.kind === 172) {
-                while (root.parent && root.parent.kind === 172) {
-                    root = root.parent;
-                }
-                isLastClause = root.name === node;
-            }
-            if (!isLastClause && root.parent.kind === 194 && root.parent.parent.kind === 251) {
-                var decl = root.parent.parent.parent;
-                return (decl.kind === 221 && root.parent.parent.token === 106) ||
-                    (decl.kind === 222 && root.parent.parent.token === 83);
-            }
-            return false;
-        }
-        function isQualifiedNameNamespaceReference(node) {
-            var root = node;
-            var isLastClause = true;
-            if (root.parent.kind === 139) {
-                while (root.parent && root.parent.kind === 139) {
-                    root = root.parent;
-                }
-                isLastClause = root.right === node;
-            }
-            return root.parent.kind === 155 && !isLastClause;
-        }
-        function isInRightSideOfImport(node) {
-            while (node.parent.kind === 139) {
-                node = node.parent;
-            }
-            return ts.isInternalModuleImportEqualsDeclaration(node.parent) && node.parent.moduleReference === node;
-        }
-        function getMeaningFromRightHandSideOfImportEquals(node) {
-            ts.Debug.assert(node.kind === 69);
-            if (node.parent.kind === 139 &&
-                node.parent.right === node &&
-                node.parent.parent.kind === 229) {
-                return 1 | 2 | 4;
-            }
-            return 4;
-        }
-        function getMeaningFromLocation(node) {
-            if (node.parent.kind === 235) {
-                return 1 | 2 | 4;
-            }
-            else if (isInRightSideOfImport(node)) {
-                return getMeaningFromRightHandSideOfImportEquals(node);
-            }
-            else if (ts.isDeclarationName(node)) {
-                return getMeaningFromDeclaration(node.parent);
-            }
-            else if (isTypeReference(node)) {
-                return 2;
-            }
-            else if (isNamespaceReference(node)) {
-                return 4;
-            }
-            else {
-                return 1;
-            }
-        }
-        function getSignatureHelpItems(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            return ts.SignatureHelp.getSignatureHelpItems(program, sourceFile, position, cancellationToken);
-        }
-        function getNonBoundSourceFile(fileName) {
-            return syntaxTreeCache.getCurrentSourceFile(fileName);
-        }
-        function getNameOrDottedNameSpan(fileName, startPos, endPos) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, startPos);
-            if (node === sourceFile) {
-                return;
-            }
-            switch (node.kind) {
-                case 172:
-                case 139:
-                case 9:
-                case 166:
-                case 84:
-                case 99:
-                case 93:
-                case 95:
-                case 97:
-                case 165:
-                case 69:
-                    break;
-                default:
-                    return;
-            }
-            var nodeForStartPos = node;
-            while (true) {
-                if (isRightSideOfPropertyAccess(nodeForStartPos) || isRightSideOfQualifiedName(nodeForStartPos)) {
-                    nodeForStartPos = nodeForStartPos.parent;
-                }
-                else if (isNameOfModuleDeclaration(nodeForStartPos)) {
-                    if (nodeForStartPos.parent.parent.kind === 225 &&
-                        nodeForStartPos.parent.parent.body === nodeForStartPos.parent) {
-                        nodeForStartPos = nodeForStartPos.parent.parent.name;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                else {
-                    break;
-                }
-            }
-            return ts.createTextSpanFromBounds(nodeForStartPos.getStart(), node.getEnd());
-        }
-        function getBreakpointStatementAtPosition(fileName, position) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.BreakpointResolver.spanInSourceFileAtLocation(sourceFile, position);
-        }
-        function getNavigationBarItems(fileName) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.NavigationBar.getNavigationBarItems(sourceFile, host.getCompilationSettings());
-        }
-        function getSemanticClassifications(fileName, span) {
-            return convertClassifications(getEncodedSemanticClassifications(fileName, span));
-        }
-        function checkForClassificationCancellation(kind) {
-            switch (kind) {
-                case 225:
-                case 221:
-                case 222:
-                case 220:
-                    cancellationToken.throwIfCancellationRequested();
-            }
-        }
-        function getEncodedSemanticClassifications(fileName, span) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var typeChecker = program.getTypeChecker();
-            var result = [];
-            var classifiableNames = program.getClassifiableNames();
-            processNode(sourceFile);
-            return { spans: result, endOfLineState: 0 };
-            function pushClassification(start, length, type) {
-                result.push(start);
-                result.push(length);
-                result.push(type);
-            }
-            function classifySymbol(symbol, meaningAtPosition) {
-                var flags = symbol.getFlags();
-                if ((flags & 788448) === 0) {
-                    return;
-                }
-                if (flags & 32) {
-                    return 11;
-                }
-                else if (flags & 384) {
-                    return 12;
-                }
-                else if (flags & 524288) {
-                    return 16;
-                }
-                else if (meaningAtPosition & 2) {
-                    if (flags & 64) {
-                        return 13;
-                    }
-                    else if (flags & 262144) {
-                        return 15;
-                    }
-                }
-                else if (flags & 1536) {
-                    if (meaningAtPosition & 4 ||
-                        (meaningAtPosition & 1 && hasValueSideModule(symbol))) {
-                        return 14;
-                    }
-                }
-                return undefined;
-                function hasValueSideModule(symbol) {
-                    return ts.forEach(symbol.declarations, function (declaration) {
-                        return declaration.kind === 225 &&
-                            ts.getModuleInstanceState(declaration) === 1;
-                    });
-                }
-            }
-            function processNode(node) {
-                if (node && ts.textSpanIntersectsWith(span, node.getFullStart(), node.getFullWidth())) {
-                    var kind = node.kind;
-                    checkForClassificationCancellation(kind);
-                    if (kind === 69 && !ts.nodeIsMissing(node)) {
-                        var identifier = node;
-                        if (classifiableNames[identifier.text]) {
-                            var symbol = typeChecker.getSymbolAtLocation(node);
-                            if (symbol) {
-                                var type = classifySymbol(symbol, getMeaningFromLocation(node));
-                                if (type) {
-                                    pushClassification(node.getStart(), node.getWidth(), type);
-                                }
-                            }
-                        }
-                    }
-                    ts.forEachChild(node, processNode);
-                }
-            }
-        }
-        function getClassificationTypeName(type) {
-            switch (type) {
-                case 1: return ClassificationTypeNames.comment;
-                case 2: return ClassificationTypeNames.identifier;
-                case 3: return ClassificationTypeNames.keyword;
-                case 4: return ClassificationTypeNames.numericLiteral;
-                case 5: return ClassificationTypeNames.operator;
-                case 6: return ClassificationTypeNames.stringLiteral;
-                case 8: return ClassificationTypeNames.whiteSpace;
-                case 9: return ClassificationTypeNames.text;
-                case 10: return ClassificationTypeNames.punctuation;
-                case 11: return ClassificationTypeNames.className;
-                case 12: return ClassificationTypeNames.enumName;
-                case 13: return ClassificationTypeNames.interfaceName;
-                case 14: return ClassificationTypeNames.moduleName;
-                case 15: return ClassificationTypeNames.typeParameterName;
-                case 16: return ClassificationTypeNames.typeAliasName;
-                case 17: return ClassificationTypeNames.parameterName;
-                case 18: return ClassificationTypeNames.docCommentTagName;
-                case 19: return ClassificationTypeNames.jsxOpenTagName;
-                case 20: return ClassificationTypeNames.jsxCloseTagName;
-                case 21: return ClassificationTypeNames.jsxSelfClosingTagName;
-                case 22: return ClassificationTypeNames.jsxAttribute;
-                case 23: return ClassificationTypeNames.jsxText;
-                case 24: return ClassificationTypeNames.jsxAttributeStringLiteralValue;
-            }
-        }
-        function convertClassifications(classifications) {
-            ts.Debug.assert(classifications.spans.length % 3 === 0);
-            var dense = classifications.spans;
-            var result = [];
-            for (var i = 0, n = dense.length; i < n; i += 3) {
-                result.push({
-                    textSpan: ts.createTextSpan(dense[i], dense[i + 1]),
-                    classificationType: getClassificationTypeName(dense[i + 2])
-                });
-            }
-            return result;
-        }
-        function getSyntacticClassifications(fileName, span) {
-            return convertClassifications(getEncodedSyntacticClassifications(fileName, span));
-        }
-        function getEncodedSyntacticClassifications(fileName, span) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            var spanStart = span.start;
-            var spanLength = span.length;
-            var triviaScanner = ts.createScanner(2, false, sourceFile.languageVariant, sourceFile.text);
-            var mergeConflictScanner = ts.createScanner(2, false, sourceFile.languageVariant, sourceFile.text);
-            var result = [];
-            processElement(sourceFile);
-            return { spans: result, endOfLineState: 0 };
-            function pushClassification(start, length, type) {
-                result.push(start);
-                result.push(length);
-                result.push(type);
-            }
-            function classifyLeadingTriviaAndGetTokenStart(token) {
-                triviaScanner.setTextPos(token.pos);
-                while (true) {
-                    var start = triviaScanner.getTextPos();
-                    if (!ts.couldStartTrivia(sourceFile.text, start)) {
-                        return start;
-                    }
-                    var kind = triviaScanner.scan();
-                    var end = triviaScanner.getTextPos();
-                    var width = end - start;
-                    if (!ts.isTrivia(kind)) {
-                        return start;
-                    }
-                    if (kind === 4 || kind === 5) {
-                        continue;
-                    }
-                    if (ts.isComment(kind)) {
-                        classifyComment(token, kind, start, width);
-                        triviaScanner.setTextPos(end);
-                        continue;
-                    }
-                    if (kind === 7) {
-                        var text = sourceFile.text;
-                        var ch = text.charCodeAt(start);
-                        if (ch === 60 || ch === 62) {
-                            pushClassification(start, width, 1);
-                            continue;
-                        }
-                        ts.Debug.assert(ch === 61);
-                        classifyDisabledMergeCode(text, start, end);
-                    }
-                }
-            }
-            function classifyComment(token, kind, start, width) {
-                if (kind === 3) {
-                    var docCommentAndDiagnostics = ts.parseIsolatedJSDocComment(sourceFile.text, start, width);
-                    if (docCommentAndDiagnostics && docCommentAndDiagnostics.jsDocComment) {
-                        docCommentAndDiagnostics.jsDocComment.parent = token;
-                        classifyJSDocComment(docCommentAndDiagnostics.jsDocComment);
-                        return;
-                    }
-                }
-                pushCommentRange(start, width);
-            }
-            function pushCommentRange(start, width) {
-                pushClassification(start, width, 1);
-            }
-            function classifyJSDocComment(docComment) {
-                var pos = docComment.pos;
-                for (var _i = 0, _a = docComment.tags; _i < _a.length; _i++) {
-                    var tag = _a[_i];
-                    if (tag.pos !== pos) {
-                        pushCommentRange(pos, tag.pos - pos);
-                    }
-                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, 10);
-                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, 18);
-                    pos = tag.tagName.end;
-                    switch (tag.kind) {
-                        case 275:
-                            processJSDocParameterTag(tag);
-                            break;
-                        case 278:
-                            processJSDocTemplateTag(tag);
-                            break;
-                        case 277:
-                            processElement(tag.typeExpression);
-                            break;
-                        case 276:
-                            processElement(tag.typeExpression);
-                            break;
-                    }
-                    pos = tag.end;
-                }
-                if (pos !== docComment.end) {
-                    pushCommentRange(pos, docComment.end - pos);
-                }
-                return;
-                function processJSDocParameterTag(tag) {
-                    if (tag.preParameterName) {
-                        pushCommentRange(pos, tag.preParameterName.pos - pos);
-                        pushClassification(tag.preParameterName.pos, tag.preParameterName.end - tag.preParameterName.pos, 17);
-                        pos = tag.preParameterName.end;
-                    }
-                    if (tag.typeExpression) {
-                        pushCommentRange(pos, tag.typeExpression.pos - pos);
-                        processElement(tag.typeExpression);
-                        pos = tag.typeExpression.end;
-                    }
-                    if (tag.postParameterName) {
-                        pushCommentRange(pos, tag.postParameterName.pos - pos);
-                        pushClassification(tag.postParameterName.pos, tag.postParameterName.end - tag.postParameterName.pos, 17);
-                        pos = tag.postParameterName.end;
-                    }
-                }
-            }
-            function processJSDocTemplateTag(tag) {
-                for (var _i = 0, _a = tag.getChildren(); _i < _a.length; _i++) {
-                    var child = _a[_i];
-                    processElement(child);
-                }
-            }
-            function classifyDisabledMergeCode(text, start, end) {
-                var i;
-                for (i = start; i < end; i++) {
-                    if (ts.isLineBreak(text.charCodeAt(i))) {
-                        break;
-                    }
-                }
-                pushClassification(start, i - start, 1);
-                mergeConflictScanner.setTextPos(i);
-                while (mergeConflictScanner.getTextPos() < end) {
-                    classifyDisabledCodeToken();
-                }
-            }
-            function classifyDisabledCodeToken() {
-                var start = mergeConflictScanner.getTextPos();
-                var tokenKind = mergeConflictScanner.scan();
-                var end = mergeConflictScanner.getTextPos();
-                var type = classifyTokenType(tokenKind);
-                if (type) {
-                    pushClassification(start, end - start, type);
-                }
-            }
-            function tryClassifyNode(node) {
-                if (ts.nodeIsMissing(node)) {
-                    return true;
-                }
-                var classifiedElementName = tryClassifyJsxElementName(node);
-                if (!ts.isToken(node) && node.kind !== 244 && classifiedElementName === undefined) {
-                    return false;
-                }
-                var tokenStart = node.kind === 244 ? node.pos : classifyLeadingTriviaAndGetTokenStart(node);
-                var tokenWidth = node.end - tokenStart;
-                ts.Debug.assert(tokenWidth >= 0);
-                if (tokenWidth > 0) {
-                    var type = classifiedElementName || classifyTokenType(node.kind, node);
-                    if (type) {
-                        pushClassification(tokenStart, tokenWidth, type);
-                    }
-                }
-                return true;
-            }
-            function tryClassifyJsxElementName(token) {
-                switch (token.parent && token.parent.kind) {
-                    case 243:
-                        if (token.parent.tagName === token) {
-                            return 19;
-                        }
-                        break;
-                    case 245:
-                        if (token.parent.tagName === token) {
-                            return 20;
-                        }
-                        break;
-                    case 242:
-                        if (token.parent.tagName === token) {
-                            return 21;
-                        }
-                        break;
-                    case 246:
-                        if (token.parent.name === token) {
-                            return 22;
-                        }
-                        break;
-                }
-                return undefined;
-            }
-            function classifyTokenType(tokenKind, token) {
-                if (ts.isKeyword(tokenKind)) {
-                    return 3;
-                }
-                if (tokenKind === 25 || tokenKind === 27) {
-                    if (token && ts.getTypeArgumentOrTypeParameterList(token.parent)) {
-                        return 10;
-                    }
-                }
-                if (ts.isPunctuation(tokenKind)) {
-                    if (token) {
-                        if (tokenKind === 56) {
-                            if (token.parent.kind === 218 ||
-                                token.parent.kind === 145 ||
-                                token.parent.kind === 142 ||
-                                token.parent.kind === 246) {
-                                return 5;
-                            }
-                        }
-                        if (token.parent.kind === 187 ||
-                            token.parent.kind === 185 ||
-                            token.parent.kind === 186 ||
-                            token.parent.kind === 188) {
-                            return 5;
-                        }
-                    }
-                    return 10;
-                }
-                else if (tokenKind === 8) {
-                    return 4;
-                }
-                else if (tokenKind === 9 || tokenKind === 166) {
-                    return token.parent.kind === 246 ? 24 : 6;
-                }
-                else if (tokenKind === 10) {
-                    return 6;
-                }
-                else if (ts.isTemplateLiteralKind(tokenKind)) {
-                    return 6;
-                }
-                else if (tokenKind === 244) {
-                    return 23;
-                }
-                else if (tokenKind === 69) {
-                    if (token) {
-                        switch (token.parent.kind) {
-                            case 221:
-                                if (token.parent.name === token) {
-                                    return 11;
-                                }
-                                return;
-                            case 141:
-                                if (token.parent.name === token) {
-                                    return 15;
-                                }
-                                return;
-                            case 222:
-                                if (token.parent.name === token) {
-                                    return 13;
-                                }
-                                return;
-                            case 224:
-                                if (token.parent.name === token) {
-                                    return 12;
-                                }
-                                return;
-                            case 225:
-                                if (token.parent.name === token) {
-                                    return 14;
-                                }
-                                return;
-                            case 142:
-                                if (token.parent.name === token) {
-                                    return 17;
-                                }
-                                return;
-                        }
-                    }
-                    return 2;
-                }
-            }
-            function processElement(element) {
-                if (!element) {
-                    return;
-                }
-                if (ts.decodedTextSpanIntersectsWith(spanStart, spanLength, element.pos, element.getFullWidth())) {
-                    checkForClassificationCancellation(element.kind);
-                    var children = element.getChildren(sourceFile);
-                    for (var i = 0, n = children.length; i < n; i++) {
-                        var child = children[i];
-                        if (!tryClassifyNode(child)) {
-                            processElement(child);
-                        }
-                    }
-                }
-            }
-        }
-        function getOutliningSpans(fileName) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.OutliningElementsCollector.collectElements(sourceFile);
-        }
-        function getBraceMatchingAtPosition(fileName, position) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            var result = [];
-            var token = ts.getTouchingToken(sourceFile, position);
-            if (token.getStart(sourceFile) === position) {
-                var matchKind = getMatchingTokenKind(token);
-                if (matchKind) {
-                    var parentElement = token.parent;
-                    var childNodes = parentElement.getChildren(sourceFile);
-                    for (var _i = 0, childNodes_1 = childNodes; _i < childNodes_1.length; _i++) {
-                        var current = childNodes_1[_i];
-                        if (current.kind === matchKind) {
-                            var range1 = ts.createTextSpan(token.getStart(sourceFile), token.getWidth(sourceFile));
-                            var range2 = ts.createTextSpan(current.getStart(sourceFile), current.getWidth(sourceFile));
-                            if (range1.start < range2.start) {
-                                result.push(range1, range2);
-                            }
-                            else {
-                                result.push(range2, range1);
-                            }
-                            break;
-                        }
-                    }
-                }
-            }
-            return result;
-            function getMatchingTokenKind(token) {
-                switch (token.kind) {
-                    case 15: return 16;
-                    case 17: return 18;
-                    case 19: return 20;
-                    case 25: return 27;
-                    case 16: return 15;
-                    case 18: return 17;
-                    case 20: return 19;
-                    case 27: return 25;
-                }
-                return undefined;
-            }
-        }
-        function getIndentationAtPosition(fileName, position, editorOptions) {
-            var start = new Date().getTime();
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            log("getIndentationAtPosition: getCurrentSourceFile: " + (new Date().getTime() - start));
-            start = new Date().getTime();
-            var result = ts.formatting.SmartIndenter.getIndentation(position, sourceFile, editorOptions);
-            log("getIndentationAtPosition: computeIndentation  : " + (new Date().getTime() - start));
-            return result;
-        }
-        function getFormattingEditsForRange(fileName, start, end, options) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.formatting.formatSelection(start, end, sourceFile, getRuleProvider(options), options);
-        }
-        function getFormattingEditsForDocument(fileName, options) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.formatting.formatDocument(sourceFile, getRuleProvider(options), options);
-        }
-        function getFormattingEditsAfterKeystroke(fileName, position, key, options) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            if (key === "}") {
-                return ts.formatting.formatOnClosingCurly(position, sourceFile, getRuleProvider(options), options);
-            }
-            else if (key === ";") {
-                return ts.formatting.formatOnSemicolon(position, sourceFile, getRuleProvider(options), options);
-            }
-            else if (key === "\n") {
-                return ts.formatting.formatOnEnter(position, sourceFile, getRuleProvider(options), options);
-            }
-            return [];
-        }
-        function getDocCommentTemplateAtPosition(fileName, position) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position) || ts.hasDocComment(sourceFile, position)) {
-                return undefined;
-            }
-            var tokenAtPos = ts.getTokenAtPosition(sourceFile, position);
-            var tokenStart = tokenAtPos.getStart();
-            if (!tokenAtPos || tokenStart < position) {
-                return undefined;
-            }
-            var commentOwner;
-            findOwner: for (commentOwner = tokenAtPos; commentOwner; commentOwner = commentOwner.parent) {
-                switch (commentOwner.kind) {
-                    case 220:
-                    case 147:
-                    case 148:
-                    case 221:
-                    case 200:
-                        break findOwner;
-                    case 256:
-                        return undefined;
-                    case 225:
-                        if (commentOwner.parent.kind === 225) {
-                            return undefined;
-                        }
-                        break findOwner;
-                }
-            }
-            if (!commentOwner || commentOwner.getStart() < position) {
-                return undefined;
-            }
-            var parameters = getParametersForJsDocOwningNode(commentOwner);
-            var posLineAndChar = sourceFile.getLineAndCharacterOfPosition(position);
-            var lineStart = sourceFile.getLineStarts()[posLineAndChar.line];
-            var indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character);
-            var newLine = ts.getNewLineOrDefaultFromHost(host);
-            var docParams = "";
-            for (var i = 0, numParams = parameters.length; i < numParams; i++) {
-                var currentName = parameters[i].name;
-                var paramName = currentName.kind === 69 ?
-                    currentName.text :
-                    "param" + i;
-                docParams += indentationStr + " * @param " + paramName + newLine;
-            }
-            var preamble = "/**" + newLine +
-                indentationStr + " * ";
-            var result = preamble + newLine +
-                docParams +
-                indentationStr + " */" +
-                (tokenStart === position ? newLine + indentationStr : "");
-            return { newText: result, caretOffset: preamble.length };
-        }
-        function isValidBraceCompletionAtPostion(fileName, position, openingBrace) {
-            if (openingBrace === 60) {
-                return false;
-            }
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position)) {
-                return false;
-            }
-            if (ts.isInsideJsxElementOrAttribute(sourceFile, position)) {
-                return openingBrace === 123;
-            }
-            if (ts.isInTemplateString(sourceFile, position)) {
-                return false;
-            }
-            return true;
-        }
-        function getParametersForJsDocOwningNode(commentOwner) {
-            if (ts.isFunctionLike(commentOwner)) {
-                return commentOwner.parameters;
-            }
-            if (commentOwner.kind === 200) {
-                var varStatement = commentOwner;
-                var varDeclarations = varStatement.declarationList.declarations;
-                if (varDeclarations.length === 1 && varDeclarations[0].initializer) {
-                    return getParametersFromRightHandSideOfAssignment(varDeclarations[0].initializer);
-                }
-            }
-            return emptyArray;
-        }
-        function getParametersFromRightHandSideOfAssignment(rightHandSide) {
-            while (rightHandSide.kind === 178) {
-                rightHandSide = rightHandSide.expression;
-            }
-            switch (rightHandSide.kind) {
-                case 179:
-                case 180:
-                    return rightHandSide.parameters;
-                case 192:
-                    for (var _i = 0, _a = rightHandSide.members; _i < _a.length; _i++) {
-                        var member = _a[_i];
-                        if (member.kind === 148) {
-                            return member.parameters;
-                        }
-                    }
-                    break;
-            }
-            return emptyArray;
-        }
-        function getTodoComments(fileName, descriptors) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            cancellationToken.throwIfCancellationRequested();
-            var fileContents = sourceFile.text;
-            var result = [];
-            if (descriptors.length > 0) {
-                var regExp = getTodoCommentsRegExp();
-                var matchArray = void 0;
-                while (matchArray = regExp.exec(fileContents)) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var firstDescriptorCaptureIndex = 3;
-                    ts.Debug.assert(matchArray.length === descriptors.length + firstDescriptorCaptureIndex);
-                    var preamble = matchArray[1];
-                    var matchPosition = matchArray.index + preamble.length;
-                    var token = ts.getTokenAtPosition(sourceFile, matchPosition);
-                    if (!isInsideComment(sourceFile, token, matchPosition)) {
-                        continue;
-                    }
-                    var descriptor = undefined;
-                    for (var i = 0, n = descriptors.length; i < n; i++) {
-                        if (matchArray[i + firstDescriptorCaptureIndex]) {
-                            descriptor = descriptors[i];
-                        }
-                    }
-                    ts.Debug.assert(descriptor !== undefined);
-                    if (isLetterOrDigit(fileContents.charCodeAt(matchPosition + descriptor.text.length))) {
-                        continue;
-                    }
-                    var message = matchArray[2];
-                    result.push({
-                        descriptor: descriptor,
-                        message: message,
-                        position: matchPosition
-                    });
-                }
-            }
-            return result;
-            function escapeRegExp(str) {
-                return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
-            }
-            function getTodoCommentsRegExp() {
-                var singleLineCommentStart = /(?:\/\/+\s*)/.source;
-                var multiLineCommentStart = /(?:\/\*+\s*)/.source;
-                var anyNumberOfSpacesAndAsterisksAtStartOfLine = /(?:^(?:\s|\*)*)/.source;
-                var preamble = "(" + anyNumberOfSpacesAndAsterisksAtStartOfLine + "|" + singleLineCommentStart + "|" + multiLineCommentStart + ")";
-                var literals = "(?:" + ts.map(descriptors, function (d) { return "(" + escapeRegExp(d.text) + ")"; }).join("|") + ")";
-                var endOfLineOrEndOfComment = /(?:$|\*\/)/.source;
-                var messageRemainder = /(?:.*?)/.source;
-                var messagePortion = "(" + literals + messageRemainder + ")";
-                var regExpString = preamble + messagePortion + endOfLineOrEndOfComment;
-                return new RegExp(regExpString, "gim");
-            }
-            function isLetterOrDigit(char) {
-                return (char >= 97 && char <= 122) ||
-                    (char >= 65 && char <= 90) ||
-                    (char >= 48 && char <= 57);
-            }
-        }
-        function getStringLiteralTypeForNode(node, typeChecker) {
-            var searchNode = node.parent.kind === 166 ? node.parent : node;
-            var type = typeChecker.getTypeAtLocation(searchNode);
-            if (type && type.flags & 256) {
-                return type;
-            }
-            return undefined;
-        }
-        function getRenameInfo(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var typeChecker = program.getTypeChecker();
-            var defaultLibFileName = host.getDefaultLibFileName(host.getCompilationSettings());
-            var canonicalDefaultLibName = getCanonicalFileName(ts.normalizePath(defaultLibFileName));
-            var node = ts.getTouchingWord(sourceFile, position);
-            if (node) {
-                if (node.kind === 69 ||
-                    node.kind === 9 ||
-                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                    var symbol = typeChecker.getSymbolAtLocation(node);
-                    if (symbol) {
-                        var declarations = symbol.getDeclarations();
-                        if (declarations && declarations.length > 0) {
-                            if (ts.forEach(declarations, isDefinedInLibraryFile)) {
-                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                            }
-                            var displayName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
-                            var kind = getSymbolKind(symbol, node);
-                            if (kind) {
-                                return {
-                                    canRename: true,
-                                    kind: kind,
-                                    displayName: displayName,
-                                    localizedErrorMessage: undefined,
-                                    fullDisplayName: typeChecker.getFullyQualifiedName(symbol),
-                                    kindModifiers: getSymbolModifiers(symbol),
-                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                                };
-                            }
-                        }
-                    }
-                    else if (node.kind === 9) {
-                        var type = getStringLiteralTypeForNode(node, typeChecker);
-                        if (type) {
-                            if (isDefinedInLibraryFile(node)) {
-                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                            }
-                            else {
-                                var displayName = ts.stripQuotes(type.text);
-                                return {
-                                    canRename: true,
-                                    kind: ScriptElementKind.variableElement,
-                                    displayName: displayName,
-                                    localizedErrorMessage: undefined,
-                                    fullDisplayName: displayName,
-                                    kindModifiers: ScriptElementKindModifier.none,
-                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                                };
-                            }
-                        }
-                    }
-                }
-            }
-            return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_this_element));
-            function getRenameInfoError(localizedErrorMessage) {
-                return {
-                    canRename: false,
-                    localizedErrorMessage: localizedErrorMessage,
-                    displayName: undefined,
-                    fullDisplayName: undefined,
-                    kind: undefined,
-                    kindModifiers: undefined,
-                    triggerSpan: undefined
-                };
-            }
-            function isDefinedInLibraryFile(declaration) {
-                if (defaultLibFileName) {
-                    var sourceFile_3 = declaration.getSourceFile();
-                    var canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile_3.fileName));
-                    if (canonicalName === canonicalDefaultLibName) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function createTriggerSpanForNode(node, sourceFile) {
-                var start = node.getStart(sourceFile);
-                var width = node.getWidth(sourceFile);
-                if (node.kind === 9) {
-                    start += 1;
-                    width -= 2;
-                }
-                return ts.createTextSpan(start, width);
-            }
-        }
-        return {
-            dispose: dispose,
-            cleanupSemanticCache: cleanupSemanticCache,
-            getSyntacticDiagnostics: getSyntacticDiagnostics,
-            getSemanticDiagnostics: getSemanticDiagnostics,
-            getCompilerOptionsDiagnostics: getCompilerOptionsDiagnostics,
-            getSyntacticClassifications: getSyntacticClassifications,
-            getSemanticClassifications: getSemanticClassifications,
-            getEncodedSyntacticClassifications: getEncodedSyntacticClassifications,
-            getEncodedSemanticClassifications: getEncodedSemanticClassifications,
-            getCompletionsAtPosition: getCompletionsAtPosition,
-            getCompletionEntryDetails: getCompletionEntryDetails,
-            getSignatureHelpItems: getSignatureHelpItems,
-            getQuickInfoAtPosition: getQuickInfoAtPosition,
-            getDefinitionAtPosition: getDefinitionAtPosition,
-            getTypeDefinitionAtPosition: getTypeDefinitionAtPosition,
-            getReferencesAtPosition: getReferencesAtPosition,
-            findReferences: findReferences,
-            getOccurrencesAtPosition: getOccurrencesAtPosition,
-            getDocumentHighlights: getDocumentHighlights,
-            getNameOrDottedNameSpan: getNameOrDottedNameSpan,
-            getBreakpointStatementAtPosition: getBreakpointStatementAtPosition,
-            getNavigateToItems: getNavigateToItems,
-            getRenameInfo: getRenameInfo,
-            findRenameLocations: findRenameLocations,
-            getNavigationBarItems: getNavigationBarItems,
-            getOutliningSpans: getOutliningSpans,
-            getTodoComments: getTodoComments,
-            getBraceMatchingAtPosition: getBraceMatchingAtPosition,
-            getIndentationAtPosition: getIndentationAtPosition,
-            getFormattingEditsForRange: getFormattingEditsForRange,
-            getFormattingEditsForDocument: getFormattingEditsForDocument,
-            getFormattingEditsAfterKeystroke: getFormattingEditsAfterKeystroke,
-            getDocCommentTemplateAtPosition: getDocCommentTemplateAtPosition,
-            isValidBraceCompletionAtPostion: isValidBraceCompletionAtPostion,
-            getEmitOutput: getEmitOutput,
-            getNonBoundSourceFile: getNonBoundSourceFile,
-            getProgram: getProgram
-        };
-    }
-    ts.createLanguageService = createLanguageService;
-    function getNameTable(sourceFile) {
-        if (!sourceFile.nameTable) {
-            initializeNameTable(sourceFile);
-        }
-        return sourceFile.nameTable;
-    }
-    ts.getNameTable = getNameTable;
-    function initializeNameTable(sourceFile) {
-        var nameTable = {};
-        walk(sourceFile);
-        sourceFile.nameTable = nameTable;
-        function walk(node) {
-            switch (node.kind) {
-                case 69:
-                    nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
-                    break;
-                case 9:
-                case 8:
-                    if (ts.isDeclarationName(node) ||
-                        node.parent.kind === 240 ||
-                        isArgumentOfElementAccessExpression(node) ||
-                        ts.isLiteralComputedPropertyDeclarationName(node)) {
-                        nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
-                    }
-                    break;
-                default:
-                    ts.forEachChild(node, walk);
-            }
-        }
-    }
-    function isArgumentOfElementAccessExpression(node) {
-        return node &&
-            node.parent &&
-            node.parent.kind === 173 &&
-            node.parent.argumentExpression === node;
-    }
-    function createClassifier() {
-        var scanner = ts.createScanner(2, false);
-        var noRegexTable = [];
-        noRegexTable[69] = true;
-        noRegexTable[9] = true;
-        noRegexTable[8] = true;
-        noRegexTable[10] = true;
-        noRegexTable[97] = true;
-        noRegexTable[41] = true;
-        noRegexTable[42] = true;
-        noRegexTable[18] = true;
-        noRegexTable[20] = true;
-        noRegexTable[16] = true;
-        noRegexTable[99] = true;
-        noRegexTable[84] = true;
-        var templateStack = [];
-        function canFollow(keyword1, keyword2) {
-            if (ts.isAccessibilityModifier(keyword1)) {
-                if (keyword2 === 123 ||
-                    keyword2 === 131 ||
-                    keyword2 === 121 ||
-                    keyword2 === 113) {
-                    return true;
-                }
-                return false;
-            }
-            return true;
-        }
-        function convertClassifications(classifications, text) {
-            var entries = [];
-            var dense = classifications.spans;
-            var lastEnd = 0;
-            for (var i = 0, n = dense.length; i < n; i += 3) {
-                var start = dense[i];
-                var length_3 = dense[i + 1];
-                var type = dense[i + 2];
-                if (lastEnd >= 0) {
-                    var whitespaceLength_1 = start - lastEnd;
-                    if (whitespaceLength_1 > 0) {
-                        entries.push({ length: whitespaceLength_1, classification: TokenClass.Whitespace });
-                    }
-                }
-                entries.push({ length: length_3, classification: convertClassification(type) });
-                lastEnd = start + length_3;
-            }
-            var whitespaceLength = text.length - lastEnd;
-            if (whitespaceLength > 0) {
-                entries.push({ length: whitespaceLength, classification: TokenClass.Whitespace });
-            }
-            return { entries: entries, finalLexState: classifications.endOfLineState };
-        }
-        function convertClassification(type) {
-            switch (type) {
-                case 1: return TokenClass.Comment;
-                case 3: return TokenClass.Keyword;
-                case 4: return TokenClass.NumberLiteral;
-                case 5: return TokenClass.Operator;
-                case 6: return TokenClass.StringLiteral;
-                case 8: return TokenClass.Whitespace;
-                case 10: return TokenClass.Punctuation;
-                case 2:
-                case 11:
-                case 12:
-                case 13:
-                case 14:
-                case 15:
-                case 16:
-                case 9:
-                case 17:
-                default:
-                    return TokenClass.Identifier;
-            }
-        }
-        function getClassificationsForLine(text, lexState, syntacticClassifierAbsent) {
-            return convertClassifications(getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent), text);
-        }
-        function getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent) {
-            var offset = 0;
-            var token = 0;
-            var lastNonTriviaToken = 0;
-            while (templateStack.length > 0) {
-                templateStack.pop();
-            }
-            switch (lexState) {
-                case 3:
-                    text = "\"\\\n" + text;
-                    offset = 3;
-                    break;
-                case 2:
-                    text = "'\\\n" + text;
-                    offset = 3;
-                    break;
-                case 1:
-                    text = "/*\n" + text;
-                    offset = 3;
-                    break;
-                case 4:
-                    text = "`\n" + text;
-                    offset = 2;
-                    break;
-                case 5:
-                    text = "}\n" + text;
-                    offset = 2;
-                case 6:
-                    templateStack.push(12);
-                    break;
-            }
-            scanner.setText(text);
-            var result = {
-                endOfLineState: 0,
-                spans: []
-            };
-            var angleBracketStack = 0;
-            do {
-                token = scanner.scan();
-                if (!ts.isTrivia(token)) {
-                    if ((token === 39 || token === 61) && !noRegexTable[lastNonTriviaToken]) {
-                        if (scanner.reScanSlashToken() === 10) {
-                            token = 10;
-                        }
-                    }
-                    else if (lastNonTriviaToken === 21 && isKeyword(token)) {
-                        token = 69;
-                    }
-                    else if (isKeyword(lastNonTriviaToken) && isKeyword(token) && !canFollow(lastNonTriviaToken, token)) {
-                        token = 69;
-                    }
-                    else if (lastNonTriviaToken === 69 &&
-                        token === 25) {
-                        angleBracketStack++;
-                    }
-                    else if (token === 27 && angleBracketStack > 0) {
-                        angleBracketStack--;
-                    }
-                    else if (token === 117 ||
-                        token === 132 ||
-                        token === 130 ||
-                        token === 120 ||
-                        token === 133) {
-                        if (angleBracketStack > 0 && !syntacticClassifierAbsent) {
-                            token = 69;
-                        }
-                    }
-                    else if (token === 12) {
-                        templateStack.push(token);
-                    }
-                    else if (token === 15) {
-                        if (templateStack.length > 0) {
-                            templateStack.push(token);
-                        }
-                    }
-                    else if (token === 16) {
-                        if (templateStack.length > 0) {
-                            var lastTemplateStackToken = ts.lastOrUndefined(templateStack);
-                            if (lastTemplateStackToken === 12) {
-                                token = scanner.reScanTemplateToken();
-                                if (token === 14) {
-                                    templateStack.pop();
-                                }
-                                else {
-                                    ts.Debug.assert(token === 13, "Should have been a template middle. Was " + token);
-                                }
-                            }
-                            else {
-                                ts.Debug.assert(lastTemplateStackToken === 15, "Should have been an open brace. Was: " + token);
-                                templateStack.pop();
-                            }
-                        }
-                    }
-                    lastNonTriviaToken = token;
-                }
-                processToken();
-            } while (token !== 1);
-            return result;
-            function processToken() {
-                var start = scanner.getTokenPos();
-                var end = scanner.getTextPos();
-                addResult(start, end, classFromKind(token));
-                if (end >= text.length) {
-                    if (token === 9 || token === 166) {
-                        var tokenText = scanner.getTokenText();
-                        if (scanner.isUnterminated()) {
-                            var lastCharIndex = tokenText.length - 1;
-                            var numBackslashes = 0;
-                            while (tokenText.charCodeAt(lastCharIndex - numBackslashes) === 92) {
-                                numBackslashes++;
-                            }
-                            if (numBackslashes & 1) {
-                                var quoteChar = tokenText.charCodeAt(0);
-                                result.endOfLineState = quoteChar === 34
-                                    ? 3
-                                    : 2;
-                            }
-                        }
-                    }
-                    else if (token === 3) {
-                        if (scanner.isUnterminated()) {
-                            result.endOfLineState = 1;
-                        }
-                    }
-                    else if (ts.isTemplateLiteralKind(token)) {
-                        if (scanner.isUnterminated()) {
-                            if (token === 14) {
-                                result.endOfLineState = 5;
-                            }
-                            else if (token === 11) {
-                                result.endOfLineState = 4;
-                            }
-                            else {
-                                ts.Debug.fail("Only 'NoSubstitutionTemplateLiteral's and 'TemplateTail's can be unterminated; got SyntaxKind #" + token);
-                            }
-                        }
-                    }
-                    else if (templateStack.length > 0 && ts.lastOrUndefined(templateStack) === 12) {
-                        result.endOfLineState = 6;
-                    }
-                }
-            }
-            function addResult(start, end, classification) {
-                if (classification === 8) {
-                    return;
-                }
-                if (start === 0 && offset > 0) {
-                    start += offset;
-                }
-                start -= offset;
-                end -= offset;
-                var length = end - start;
-                if (length > 0) {
-                    result.spans.push(start);
-                    result.spans.push(length);
-                    result.spans.push(classification);
-                }
-            }
-        }
-        function isBinaryExpressionOperatorToken(token) {
-            switch (token) {
-                case 37:
-                case 39:
-                case 40:
-                case 35:
-                case 36:
-                case 43:
-                case 44:
-                case 45:
-                case 25:
-                case 27:
-                case 28:
-                case 29:
-                case 91:
-                case 90:
-                case 116:
-                case 30:
-                case 31:
-                case 32:
-                case 33:
-                case 46:
-                case 48:
-                case 47:
-                case 51:
-                case 52:
-                case 67:
-                case 66:
-                case 68:
-                case 63:
-                case 64:
-                case 65:
-                case 57:
-                case 58:
-                case 59:
-                case 61:
-                case 62:
-                case 56:
-                case 24:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-        function isPrefixUnaryExpressionOperatorToken(token) {
-            switch (token) {
-                case 35:
-                case 36:
-                case 50:
-                case 49:
-                case 41:
-                case 42:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-        function isKeyword(token) {
-            return token >= 70 && token <= 138;
-        }
-        function classFromKind(token) {
-            if (isKeyword(token)) {
-                return 3;
-            }
-            else if (isBinaryExpressionOperatorToken(token) || isPrefixUnaryExpressionOperatorToken(token)) {
-                return 5;
-            }
-            else if (token >= 15 && token <= 68) {
-                return 10;
-            }
-            switch (token) {
-                case 8:
-                    return 4;
-                case 9:
-                case 166:
-                    return 6;
-                case 10:
-                    return 7;
-                case 7:
-                case 3:
-                case 2:
-                    return 1;
-                case 5:
-                case 4:
-                    return 8;
-                case 69:
-                default:
-                    if (ts.isTemplateLiteralKind(token)) {
-                        return 6;
-                    }
-                    return 2;
-            }
-        }
-        return {
-            getClassificationsForLine: getClassificationsForLine,
-            getEncodedLexicalClassifications: getEncodedLexicalClassifications
-        };
-    }
-    ts.createClassifier = createClassifier;
-    function getDefaultLibFilePath(options) {
-        if (typeof __dirname !== "undefined") {
-            return __dirname + ts.directorySeparator + ts.getDefaultLibFileName(options);
-        }
-        throw new Error("getDefaultLibFilePath is only supported when consumed as a node module. ");
-    }
-    ts.getDefaultLibFilePath = getDefaultLibFilePath;
-    function initializeServices() {
-        ts.objectAllocator = {
-            getNodeConstructor: function () { return NodeObject; },
-            getSourceFileConstructor: function () { return SourceFileObject; },
-            getSymbolConstructor: function () { return SymbolObject; },
-            getTypeConstructor: function () { return TypeObject; },
-            getSignatureConstructor: function () { return SignatureObject; }
-        };
-    }
-    initializeServices();
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var server;
-    (function (server) {
-        var spaceCache = [];
-        function generateSpaces(n) {
-            if (!spaceCache[n]) {
-                var strBuilder = "";
-                for (var i = 0; i < n; i++) {
-                    strBuilder += " ";
-                }
-                spaceCache[n] = strBuilder;
-            }
-            return spaceCache[n];
-        }
-        server.generateSpaces = generateSpaces;
-        function generateIndentString(n, editorOptions) {
-            if (editorOptions.ConvertTabsToSpaces) {
-                return generateSpaces(n);
-            }
-            else {
-                var result = "";
-                for (var i = 0; i < Math.floor(n / editorOptions.TabSize); i++) {
-                    result += "\t";
-                }
-                for (var i = 0; i < n % editorOptions.TabSize; i++) {
-                    result += " ";
-                }
-                return result;
-            }
-        }
-        server.generateIndentString = generateIndentString;
-        function compareNumber(a, b) {
-            if (a < b) {
-                return -1;
-            }
-            else if (a === b) {
-                return 0;
-            }
-            else
-                return 1;
-        }
-        function compareFileStart(a, b) {
-            if (a.file < b.file) {
-                return -1;
-            }
-            else if (a.file == b.file) {
-                var n = compareNumber(a.start.line, b.start.line);
-                if (n === 0) {
-                    return compareNumber(a.start.offset, b.start.offset);
-                }
-                else
-                    return n;
-            }
-            else {
-                return 1;
-            }
-        }
-        function formatDiag(fileName, project, diag) {
-            return {
-                start: project.compilerService.host.positionToLineOffset(fileName, diag.start),
-                end: project.compilerService.host.positionToLineOffset(fileName, diag.start + diag.length),
-                text: ts.flattenDiagnosticMessageText(diag.messageText, "\n")
-            };
-        }
-        function formatConfigFileDiag(diag) {
-            return {
-                start: undefined,
-                end: undefined,
-                text: ts.flattenDiagnosticMessageText(diag.messageText, "\n")
-            };
-        }
-        function allEditsBeforePos(edits, pos) {
-            for (var i = 0, len = edits.length; i < len; i++) {
-                if (ts.textSpanEnd(edits[i].span) >= pos) {
-                    return false;
-                }
-            }
-            return true;
-        }
-        var CommandNames;
-        (function (CommandNames) {
-            CommandNames.Brace = "brace";
-            CommandNames.Change = "change";
-            CommandNames.Close = "close";
-            CommandNames.Completions = "completions";
-            CommandNames.CompletionDetails = "completionEntryDetails";
-            CommandNames.Configure = "configure";
-            CommandNames.Definition = "definition";
-            CommandNames.Exit = "exit";
-            CommandNames.Format = "format";
-            CommandNames.Formatonkey = "formatonkey";
-            CommandNames.Geterr = "geterr";
-            CommandNames.GeterrForProject = "geterrForProject";
-            CommandNames.NavBar = "navbar";
-            CommandNames.Navto = "navto";
-            CommandNames.Occurrences = "occurrences";
-            CommandNames.DocumentHighlights = "documentHighlights";
-            CommandNames.Open = "open";
-            CommandNames.Quickinfo = "quickinfo";
-            CommandNames.References = "references";
-            CommandNames.Reload = "reload";
-            CommandNames.Rename = "rename";
-            CommandNames.Saveto = "saveto";
-            CommandNames.SignatureHelp = "signatureHelp";
-            CommandNames.TypeDefinition = "typeDefinition";
-            CommandNames.ProjectInfo = "projectInfo";
-            CommandNames.ReloadProjects = "reloadProjects";
-            CommandNames.Unknown = "unknown";
-        })(CommandNames = server.CommandNames || (server.CommandNames = {}));
-        var Errors;
-        (function (Errors) {
-            Errors.NoProject = new Error("No Project.");
-        })(Errors || (Errors = {}));
-        var Session = (function () {
-            function Session(host, byteLength, hrtime, logger) {
-                var _this = this;
-                this.host = host;
-                this.byteLength = byteLength;
-                this.hrtime = hrtime;
-                this.logger = logger;
-                this.changeSeq = 0;
-                this.handlers = (_a = {},
-                    _a[CommandNames.Exit] = function () {
-                        _this.exit();
-                        return { responseRequired: false };
-                    },
-                    _a[CommandNames.Definition] = function (request) {
-                        var defArgs = request.arguments;
-                        return { response: _this.getDefinition(defArgs.line, defArgs.offset, defArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.TypeDefinition] = function (request) {
-                        var defArgs = request.arguments;
-                        return { response: _this.getTypeDefinition(defArgs.line, defArgs.offset, defArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.References] = function (request) {
-                        var defArgs = request.arguments;
-                        return { response: _this.getReferences(defArgs.line, defArgs.offset, defArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.Rename] = function (request) {
-                        var renameArgs = request.arguments;
-                        return { response: _this.getRenameLocations(renameArgs.line, renameArgs.offset, renameArgs.file, renameArgs.findInComments, renameArgs.findInStrings), responseRequired: true };
-                    },
-                    _a[CommandNames.Open] = function (request) {
-                        var openArgs = request.arguments;
-                        var scriptKind;
-                        switch (openArgs.scriptKindName) {
-                            case "TS":
-                                scriptKind = 3;
-                                break;
-                            case "JS":
-                                scriptKind = 1;
-                                break;
-                            case "TSX":
-                                scriptKind = 4;
-                                break;
-                            case "JSX":
-                                scriptKind = 2;
-                                break;
-                        }
-                        _this.openClientFile(openArgs.file, openArgs.fileContent, scriptKind);
-                        return { responseRequired: false };
-                    },
-                    _a[CommandNames.Quickinfo] = function (request) {
-                        var quickinfoArgs = request.arguments;
-                        return { response: _this.getQuickInfo(quickinfoArgs.line, quickinfoArgs.offset, quickinfoArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.Format] = function (request) {
-                        var formatArgs = request.arguments;
-                        return { response: _this.getFormattingEditsForRange(formatArgs.line, formatArgs.offset, formatArgs.endLine, formatArgs.endOffset, formatArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.Formatonkey] = function (request) {
-                        var formatOnKeyArgs = request.arguments;
-                        return { response: _this.getFormattingEditsAfterKeystroke(formatOnKeyArgs.line, formatOnKeyArgs.offset, formatOnKeyArgs.key, formatOnKeyArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.Completions] = function (request) {
-                        var completionsArgs = request.arguments;
-                        return { response: _this.getCompletions(completionsArgs.line, completionsArgs.offset, completionsArgs.prefix, completionsArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.CompletionDetails] = function (request) {
-                        var completionDetailsArgs = request.arguments;
-                        return {
-                            response: _this.getCompletionEntryDetails(completionDetailsArgs.line, completionDetailsArgs.offset, completionDetailsArgs.entryNames, completionDetailsArgs.file), responseRequired: true
-                        };
-                    },
-                    _a[CommandNames.SignatureHelp] = function (request) {
-                        var signatureHelpArgs = request.arguments;
-                        return { response: _this.getSignatureHelpItems(signatureHelpArgs.line, signatureHelpArgs.offset, signatureHelpArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.Geterr] = function (request) {
-                        var geterrArgs = request.arguments;
-                        return { response: _this.getDiagnostics(geterrArgs.delay, geterrArgs.files), responseRequired: false };
-                    },
-                    _a[CommandNames.GeterrForProject] = function (request) {
-                        var _a = request.arguments, file = _a.file, delay = _a.delay;
-                        return { response: _this.getDiagnosticsForProject(delay, file), responseRequired: false };
-                    },
-                    _a[CommandNames.Change] = function (request) {
-                        var changeArgs = request.arguments;
-                        _this.change(changeArgs.line, changeArgs.offset, changeArgs.endLine, changeArgs.endOffset, changeArgs.insertString, changeArgs.file);
-                        return { responseRequired: false };
-                    },
-                    _a[CommandNames.Configure] = function (request) {
-                        var configureArgs = request.arguments;
-                        _this.projectService.setHostConfiguration(configureArgs);
-                        _this.output(undefined, CommandNames.Configure, request.seq);
-                        return { responseRequired: false };
-                    },
-                    _a[CommandNames.Reload] = function (request) {
-                        var reloadArgs = request.arguments;
-                        _this.reload(reloadArgs.file, reloadArgs.tmpfile, request.seq);
-                        return { response: { reloadFinished: true }, responseRequired: true };
-                    },
-                    _a[CommandNames.Saveto] = function (request) {
-                        var savetoArgs = request.arguments;
-                        _this.saveToTmp(savetoArgs.file, savetoArgs.tmpfile);
-                        return { responseRequired: false };
-                    },
-                    _a[CommandNames.Close] = function (request) {
-                        var closeArgs = request.arguments;
-                        _this.closeClientFile(closeArgs.file);
-                        return { responseRequired: false };
-                    },
-                    _a[CommandNames.Navto] = function (request) {
-                        var navtoArgs = request.arguments;
-                        return { response: _this.getNavigateToItems(navtoArgs.searchValue, navtoArgs.file, navtoArgs.maxResultCount), responseRequired: true };
-                    },
-                    _a[CommandNames.Brace] = function (request) {
-                        var braceArguments = request.arguments;
-                        return { response: _this.getBraceMatching(braceArguments.line, braceArguments.offset, braceArguments.file), responseRequired: true };
-                    },
-                    _a[CommandNames.NavBar] = function (request) {
-                        var navBarArgs = request.arguments;
-                        return { response: _this.getNavigationBarItems(navBarArgs.file), responseRequired: true };
-                    },
-                    _a[CommandNames.Occurrences] = function (request) {
-                        var _a = request.arguments, line = _a.line, offset = _a.offset, fileName = _a.file;
-                        return { response: _this.getOccurrences(line, offset, fileName), responseRequired: true };
-                    },
-                    _a[CommandNames.DocumentHighlights] = function (request) {
-                        var _a = request.arguments, line = _a.line, offset = _a.offset, fileName = _a.file, filesToSearch = _a.filesToSearch;
-                        return { response: _this.getDocumentHighlights(line, offset, fileName, filesToSearch), responseRequired: true };
-                    },
-                    _a[CommandNames.ProjectInfo] = function (request) {
-                        var _a = request.arguments, file = _a.file, needFileNameList = _a.needFileNameList;
-                        return { response: _this.getProjectInfo(file, needFileNameList), responseRequired: true };
-                    },
-                    _a[CommandNames.ReloadProjects] = function (request) {
-                        _this.reloadProjects();
-                        return { responseRequired: false };
-                    },
-                    _a
-                );
-                this.projectService =
-                    new server.ProjectService(host, logger, function (eventName, project, fileName) {
-                        _this.handleEvent(eventName, project, fileName);
-                    });
-                var _a;
-            }
-            Session.prototype.handleEvent = function (eventName, project, fileName) {
-                var _this = this;
-                if (eventName == "context") {
-                    this.projectService.log("got context event, updating diagnostics for" + fileName, "Info");
-                    this.updateErrorCheck([{ fileName: fileName, project: project }], this.changeSeq, function (n) { return n === _this.changeSeq; }, 100);
-                }
-            };
-            Session.prototype.logError = function (err, cmd) {
-                var typedErr = err;
-                var msg = "Exception on executing command " + cmd;
-                if (typedErr.message) {
-                    msg += ":\n" + typedErr.message;
-                    if (typedErr.stack) {
-                        msg += "\n" + typedErr.stack;
-                    }
-                }
-                this.projectService.log(msg);
-            };
-            Session.prototype.sendLineToClient = function (line) {
-                this.host.write(line + this.host.newLine);
-            };
-            Session.prototype.send = function (msg) {
-                var json = JSON.stringify(msg);
-                if (this.logger.isVerbose()) {
-                    this.logger.info(msg.type + ": " + json);
-                }
-                this.sendLineToClient("Content-Length: " + (1 + this.byteLength(json, "utf8")) +
-                    "\r\n\r\n" + json);
-            };
-            Session.prototype.configFileDiagnosticEvent = function (triggerFile, configFile, diagnostics) {
-                var bakedDiags = ts.map(diagnostics, formatConfigFileDiag);
-                var ev = {
-                    seq: 0,
-                    type: "event",
-                    event: "configFileDiag",
-                    body: {
-                        triggerFile: triggerFile,
-                        configFile: configFile,
-                        diagnostics: bakedDiags
-                    }
-                };
-                this.send(ev);
-            };
-            Session.prototype.event = function (info, eventName) {
-                var ev = {
-                    seq: 0,
-                    type: "event",
-                    event: eventName,
-                    body: info
-                };
-                this.send(ev);
-            };
-            Session.prototype.response = function (info, cmdName, reqSeq, errorMsg) {
-                if (reqSeq === void 0) { reqSeq = 0; }
-                var res = {
-                    seq: 0,
-                    type: "response",
-                    command: cmdName,
-                    request_seq: reqSeq,
-                    success: !errorMsg
-                };
-                if (!errorMsg) {
-                    res.body = info;
-                }
-                else {
-                    res.message = errorMsg;
-                }
-                this.send(res);
-            };
-            Session.prototype.output = function (body, commandName, requestSequence, errorMessage) {
-                if (requestSequence === void 0) { requestSequence = 0; }
-                this.response(body, commandName, requestSequence, errorMessage);
-            };
-            Session.prototype.semanticCheck = function (file, project) {
-                try {
-                    var diags = project.compilerService.languageService.getSemanticDiagnostics(file);
-                    if (diags) {
-                        var bakedDiags = diags.map(function (diag) { return formatDiag(file, project, diag); });
-                        this.event({ file: file, diagnostics: bakedDiags }, "semanticDiag");
-                    }
-                }
-                catch (err) {
-                    this.logError(err, "semantic check");
-                }
-            };
-            Session.prototype.syntacticCheck = function (file, project) {
-                try {
-                    var diags = project.compilerService.languageService.getSyntacticDiagnostics(file);
-                    if (diags) {
-                        var bakedDiags = diags.map(function (diag) { return formatDiag(file, project, diag); });
-                        this.event({ file: file, diagnostics: bakedDiags }, "syntaxDiag");
-                    }
-                }
-                catch (err) {
-                    this.logError(err, "syntactic check");
-                }
-            };
-            Session.prototype.reloadProjects = function () {
-                this.projectService.reloadProjects();
-            };
-            Session.prototype.updateProjectStructure = function (seq, matchSeq, ms) {
-                var _this = this;
-                if (ms === void 0) { ms = 1500; }
-                setTimeout(function () {
-                    if (matchSeq(seq)) {
-                        _this.projectService.updateProjectStructure();
-                    }
-                }, ms);
-            };
-            Session.prototype.updateErrorCheck = function (checkList, seq, matchSeq, ms, followMs, requireOpen) {
-                var _this = this;
-                if (ms === void 0) { ms = 1500; }
-                if (followMs === void 0) { followMs = 200; }
-                if (requireOpen === void 0) { requireOpen = true; }
-                if (followMs > ms) {
-                    followMs = ms;
-                }
-                if (this.errorTimer) {
-                    clearTimeout(this.errorTimer);
-                }
-                if (this.immediateId) {
-                    clearImmediate(this.immediateId);
-                    this.immediateId = undefined;
-                }
-                var index = 0;
-                var checkOne = function () {
-                    if (matchSeq(seq)) {
-                        var checkSpec_1 = checkList[index];
-                        index++;
-                        if (checkSpec_1.project.getSourceFileFromName(checkSpec_1.fileName, requireOpen)) {
-                            _this.syntacticCheck(checkSpec_1.fileName, checkSpec_1.project);
-                            _this.immediateId = setImmediate(function () {
-                                _this.semanticCheck(checkSpec_1.fileName, checkSpec_1.project);
-                                _this.immediateId = undefined;
-                                if (checkList.length > index) {
-                                    _this.errorTimer = setTimeout(checkOne, followMs);
-                                }
-                                else {
-                                    _this.errorTimer = undefined;
-                                }
-                            });
-                        }
-                    }
-                };
-                if ((checkList.length > index) && (matchSeq(seq))) {
-                    this.errorTimer = setTimeout(checkOne, ms);
-                }
-            };
-            Session.prototype.getDefinition = function (line, offset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var definitions = compilerService.languageService.getDefinitionAtPosition(file, position);
-                if (!definitions) {
-                    return undefined;
-                }
-                return definitions.map(function (def) { return ({
-                    file: def.fileName,
-                    start: compilerService.host.positionToLineOffset(def.fileName, def.textSpan.start),
-                    end: compilerService.host.positionToLineOffset(def.fileName, ts.textSpanEnd(def.textSpan))
-                }); });
-            };
-            Session.prototype.getTypeDefinition = function (line, offset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var definitions = compilerService.languageService.getTypeDefinitionAtPosition(file, position);
-                if (!definitions) {
-                    return undefined;
-                }
-                return definitions.map(function (def) { return ({
-                    file: def.fileName,
-                    start: compilerService.host.positionToLineOffset(def.fileName, def.textSpan.start),
-                    end: compilerService.host.positionToLineOffset(def.fileName, ts.textSpanEnd(def.textSpan))
-                }); });
-            };
-            Session.prototype.getOccurrences = function (line, offset, fileName) {
-                fileName = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(fileName);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(fileName, line, offset);
-                var occurrences = compilerService.languageService.getOccurrencesAtPosition(fileName, position);
-                if (!occurrences) {
-                    return undefined;
-                }
-                return occurrences.map(function (occurrence) {
-                    var fileName = occurrence.fileName, isWriteAccess = occurrence.isWriteAccess, textSpan = occurrence.textSpan;
-                    var start = compilerService.host.positionToLineOffset(fileName, textSpan.start);
-                    var end = compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(textSpan));
-                    return {
-                        start: start,
-                        end: end,
-                        file: fileName,
-                        isWriteAccess: isWriteAccess
-                    };
-                });
-            };
-            Session.prototype.getDocumentHighlights = function (line, offset, fileName, filesToSearch) {
-                fileName = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(fileName);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(fileName, line, offset);
-                var documentHighlights = compilerService.languageService.getDocumentHighlights(fileName, position, filesToSearch);
-                if (!documentHighlights) {
-                    return undefined;
-                }
-                return documentHighlights.map(convertToDocumentHighlightsItem);
-                function convertToDocumentHighlightsItem(documentHighlights) {
-                    var fileName = documentHighlights.fileName, highlightSpans = documentHighlights.highlightSpans;
-                    return {
-                        file: fileName,
-                        highlightSpans: highlightSpans.map(convertHighlightSpan)
-                    };
-                    function convertHighlightSpan(highlightSpan) {
-                        var textSpan = highlightSpan.textSpan, kind = highlightSpan.kind;
-                        var start = compilerService.host.positionToLineOffset(fileName, textSpan.start);
-                        var end = compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(textSpan));
-                        return { start: start, end: end, kind: kind };
-                    }
-                }
-            };
-            Session.prototype.getProjectInfo = function (fileName, needFileNameList) {
-                fileName = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(fileName);
-                var projectInfo = {
-                    configFileName: project.projectFilename
-                };
-                if (needFileNameList) {
-                    projectInfo.fileNames = project.getFileNames();
-                }
-                return projectInfo;
-            };
-            Session.prototype.getRenameLocations = function (line, offset, fileName, findInComments, findInStrings) {
-                var file = ts.normalizePath(fileName);
-                var info = this.projectService.getScriptInfo(file);
-                var projects = this.projectService.findReferencingProjects(info);
-                if (!projects.length) {
-                    throw Errors.NoProject;
-                }
-                var defaultProject = projects[0];
-                var defaultProjectCompilerService = defaultProject.compilerService;
-                var position = defaultProjectCompilerService.host.lineOffsetToPosition(file, line, offset);
-                var renameInfo = defaultProjectCompilerService.languageService.getRenameInfo(file, position);
-                if (!renameInfo) {
-                    return undefined;
-                }
-                if (!renameInfo.canRename) {
-                    return {
-                        info: renameInfo,
-                        locs: []
-                    };
-                }
-                var fileSpans = server.combineProjectOutput(projects, function (project) {
-                    var compilerService = project.compilerService;
-                    var renameLocations = compilerService.languageService.findRenameLocations(file, position, findInStrings, findInComments);
-                    if (!renameLocations) {
-                        return [];
-                    }
-                    return renameLocations.map(function (location) { return ({
-                        file: location.fileName,
-                        start: compilerService.host.positionToLineOffset(location.fileName, location.textSpan.start),
-                        end: compilerService.host.positionToLineOffset(location.fileName, ts.textSpanEnd(location.textSpan))
-                    }); });
-                }, compareRenameLocation, function (a, b) { return a.file === b.file && a.start.line === b.start.line && a.start.offset === b.start.offset; });
-                var locs = fileSpans.reduce(function (accum, cur) {
-                    var curFileAccum;
-                    if (accum.length > 0) {
-                        curFileAccum = accum[accum.length - 1];
-                        if (curFileAccum.file !== cur.file) {
-                            curFileAccum = undefined;
-                        }
-                    }
-                    if (!curFileAccum) {
-                        curFileAccum = { file: cur.file, locs: [] };
-                        accum.push(curFileAccum);
-                    }
-                    curFileAccum.locs.push({ start: cur.start, end: cur.end });
-                    return accum;
-                }, []);
-                return { info: renameInfo, locs: locs };
-                function compareRenameLocation(a, b) {
-                    if (a.file < b.file) {
-                        return -1;
-                    }
-                    else if (a.file > b.file) {
-                        return 1;
-                    }
-                    else {
-                        if (a.start.line < b.start.line) {
-                            return 1;
-                        }
-                        else if (a.start.line > b.start.line) {
-                            return -1;
-                        }
-                        else {
-                            return b.start.offset - a.start.offset;
-                        }
-                    }
-                }
-            };
-            Session.prototype.getReferences = function (line, offset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var info = this.projectService.getScriptInfo(file);
-                var projects = this.projectService.findReferencingProjects(info);
-                if (!projects.length) {
-                    throw Errors.NoProject;
-                }
-                var defaultProject = projects[0];
-                var position = defaultProject.compilerService.host.lineOffsetToPosition(file, line, offset);
-                var nameInfo = defaultProject.compilerService.languageService.getQuickInfoAtPosition(file, position);
-                if (!nameInfo) {
-                    return undefined;
-                }
-                var displayString = ts.displayPartsToString(nameInfo.displayParts);
-                var nameSpan = nameInfo.textSpan;
-                var nameColStart = defaultProject.compilerService.host.positionToLineOffset(file, nameSpan.start).offset;
-                var nameText = defaultProject.compilerService.host.getScriptSnapshot(file).getText(nameSpan.start, ts.textSpanEnd(nameSpan));
-                var refs = server.combineProjectOutput(projects, function (project) {
-                    var compilerService = project.compilerService;
-                    var references = compilerService.languageService.getReferencesAtPosition(file, position);
-                    if (!references) {
-                        return [];
-                    }
-                    return references.map(function (ref) {
-                        var start = compilerService.host.positionToLineOffset(ref.fileName, ref.textSpan.start);
-                        var refLineSpan = compilerService.host.lineToTextSpan(ref.fileName, start.line - 1);
-                        var snap = compilerService.host.getScriptSnapshot(ref.fileName);
-                        var lineText = snap.getText(refLineSpan.start, ts.textSpanEnd(refLineSpan)).replace(/\r|\n/g, "");
-                        return {
-                            file: ref.fileName,
-                            start: start,
-                            lineText: lineText,
-                            end: compilerService.host.positionToLineOffset(ref.fileName, ts.textSpanEnd(ref.textSpan)),
-                            isWriteAccess: ref.isWriteAccess
-                        };
-                    });
-                }, compareFileStart, areReferencesResponseItemsForTheSameLocation);
-                return {
-                    refs: refs,
-                    symbolName: nameText,
-                    symbolStartOffset: nameColStart,
-                    symbolDisplayString: displayString
-                };
-                function areReferencesResponseItemsForTheSameLocation(a, b) {
-                    if (a && b) {
-                        return a.file === b.file &&
-                            a.start === b.start &&
-                            a.end === b.end;
-                    }
-                    return false;
-                }
-            };
-            Session.prototype.openClientFile = function (fileName, fileContent, scriptKind) {
-                var file = ts.normalizePath(fileName);
-                var _a = this.projectService.openClientFile(file, fileContent, scriptKind), configFileName = _a.configFileName, configFileErrors = _a.configFileErrors;
-                if (configFileErrors) {
-                    this.configFileDiagnosticEvent(fileName, configFileName, configFileErrors);
-                }
-            };
-            Session.prototype.getQuickInfo = function (line, offset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var quickInfo = compilerService.languageService.getQuickInfoAtPosition(file, position);
-                if (!quickInfo) {
-                    return undefined;
-                }
-                var displayString = ts.displayPartsToString(quickInfo.displayParts);
-                var docString = ts.displayPartsToString(quickInfo.documentation);
-                return {
-                    kind: quickInfo.kind,
-                    kindModifiers: quickInfo.kindModifiers,
-                    start: compilerService.host.positionToLineOffset(file, quickInfo.textSpan.start),
-                    end: compilerService.host.positionToLineOffset(file, ts.textSpanEnd(quickInfo.textSpan)),
-                    displayString: displayString,
-                    documentation: docString
-                };
-            };
-            Session.prototype.getFormattingEditsForRange = function (line, offset, endLine, endOffset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var startPosition = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var endPosition = compilerService.host.lineOffsetToPosition(file, endLine, endOffset);
-                var edits = compilerService.languageService.getFormattingEditsForRange(file, startPosition, endPosition, this.projectService.getFormatCodeOptions(file));
-                if (!edits) {
-                    return undefined;
-                }
-                return edits.map(function (edit) {
-                    return {
-                        start: compilerService.host.positionToLineOffset(file, edit.span.start),
-                        end: compilerService.host.positionToLineOffset(file, ts.textSpanEnd(edit.span)),
-                        newText: edit.newText ? edit.newText : ""
-                    };
-                });
-            };
-            Session.prototype.getFormattingEditsAfterKeystroke = function (line, offset, key, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var formatOptions = this.projectService.getFormatCodeOptions(file);
-                var edits = compilerService.languageService.getFormattingEditsAfterKeystroke(file, position, key, formatOptions);
-                if ((key == "\n") && ((!edits) || (edits.length === 0) || allEditsBeforePos(edits, position))) {
-                    var scriptInfo = compilerService.host.getScriptInfo(file);
-                    if (scriptInfo) {
-                        var lineInfo = scriptInfo.getLineInfo(line);
-                        if (lineInfo && (lineInfo.leaf) && (lineInfo.leaf.text)) {
-                            var lineText = lineInfo.leaf.text;
-                            if (lineText.search("\\S") < 0) {
-                                var editorOptions = {
-                                    IndentSize: formatOptions.IndentSize,
-                                    TabSize: formatOptions.TabSize,
-                                    NewLineCharacter: formatOptions.NewLineCharacter,
-                                    ConvertTabsToSpaces: formatOptions.ConvertTabsToSpaces,
-                                    IndentStyle: ts.IndentStyle.Smart
-                                };
-                                var preferredIndent = compilerService.languageService.getIndentationAtPosition(file, position, editorOptions);
-                                var hasIndent = 0;
-                                var i = void 0, len = void 0;
-                                for (i = 0, len = lineText.length; i < len; i++) {
-                                    if (lineText.charAt(i) == " ") {
-                                        hasIndent++;
-                                    }
-                                    else if (lineText.charAt(i) == "\t") {
-                                        hasIndent += editorOptions.TabSize;
-                                    }
-                                    else {
-                                        break;
-                                    }
-                                }
-                                if (preferredIndent !== hasIndent) {
-                                    var firstNoWhiteSpacePosition = lineInfo.offset + i;
-                                    edits.push({
-                                        span: ts.createTextSpanFromBounds(lineInfo.offset, firstNoWhiteSpacePosition),
-                                        newText: generateIndentString(preferredIndent, editorOptions)
-                                    });
-                                }
-                            }
-                        }
-                    }
-                }
-                if (!edits) {
-                    return undefined;
-                }
-                return edits.map(function (edit) {
-                    return {
-                        start: compilerService.host.positionToLineOffset(file, edit.span.start),
-                        end: compilerService.host.positionToLineOffset(file, ts.textSpanEnd(edit.span)),
-                        newText: edit.newText ? edit.newText : ""
-                    };
-                });
-            };
-            Session.prototype.getCompletions = function (line, offset, prefix, fileName) {
-                if (!prefix) {
-                    prefix = "";
-                }
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var completions = compilerService.languageService.getCompletionsAtPosition(file, position);
-                if (!completions) {
-                    return undefined;
-                }
-                return completions.entries.reduce(function (result, entry) {
-                    if (completions.isMemberCompletion || (entry.name.toLowerCase().indexOf(prefix.toLowerCase()) === 0)) {
-                        result.push(entry);
-                    }
-                    return result;
-                }, []).sort(function (a, b) { return a.name.localeCompare(b.name); });
-            };
-            Session.prototype.getCompletionEntryDetails = function (line, offset, entryNames, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                return entryNames.reduce(function (accum, entryName) {
-                    var details = compilerService.languageService.getCompletionEntryDetails(file, position, entryName);
-                    if (details) {
-                        accum.push(details);
-                    }
-                    return accum;
-                }, []);
-            };
-            Session.prototype.getSignatureHelpItems = function (line, offset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var helpItems = compilerService.languageService.getSignatureHelpItems(file, position);
-                if (!helpItems) {
-                    return undefined;
-                }
-                var span = helpItems.applicableSpan;
-                var result = {
-                    items: helpItems.items,
-                    applicableSpan: {
-                        start: compilerService.host.positionToLineOffset(file, span.start),
-                        end: compilerService.host.positionToLineOffset(file, span.start + span.length)
-                    },
-                    selectedItemIndex: helpItems.selectedItemIndex,
-                    argumentIndex: helpItems.argumentIndex,
-                    argumentCount: helpItems.argumentCount
-                };
-                return result;
-            };
-            Session.prototype.getDiagnostics = function (delay, fileNames) {
-                var _this = this;
-                var checkList = fileNames.reduce(function (accum, fileName) {
-                    fileName = ts.normalizePath(fileName);
-                    var project = _this.projectService.getProjectForFile(fileName);
-                    if (project) {
-                        accum.push({ fileName: fileName, project: project });
-                    }
-                    return accum;
-                }, []);
-                if (checkList.length > 0) {
-                    this.updateErrorCheck(checkList, this.changeSeq, function (n) { return n === _this.changeSeq; }, delay);
-                }
-            };
-            Session.prototype.change = function (line, offset, endLine, endOffset, insertString, fileName) {
-                var _this = this;
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (project) {
-                    var compilerService = project.compilerService;
-                    var start = compilerService.host.lineOffsetToPosition(file, line, offset);
-                    var end = compilerService.host.lineOffsetToPosition(file, endLine, endOffset);
-                    if (start >= 0) {
-                        compilerService.host.editScript(file, start, end, insertString);
-                        this.changeSeq++;
-                    }
-                    this.updateProjectStructure(this.changeSeq, function (n) { return n === _this.changeSeq; });
-                }
-            };
-            Session.prototype.reload = function (fileName, tempFileName, reqSeq) {
-                var _this = this;
-                if (reqSeq === void 0) { reqSeq = 0; }
-                var file = ts.normalizePath(fileName);
-                var tmpfile = ts.normalizePath(tempFileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (project) {
-                    this.changeSeq++;
-                    project.compilerService.host.reloadScript(file, tmpfile, function () {
-                        _this.output(undefined, CommandNames.Reload, reqSeq);
-                    });
-                }
-            };
-            Session.prototype.saveToTmp = function (fileName, tempFileName) {
-                var file = ts.normalizePath(fileName);
-                var tmpfile = ts.normalizePath(tempFileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (project) {
-                    project.compilerService.host.saveTo(file, tmpfile);
-                }
-            };
-            Session.prototype.closeClientFile = function (fileName) {
-                if (!fileName) {
-                    return;
-                }
-                var file = ts.normalizePath(fileName);
-                this.projectService.closeClientFile(file);
-            };
-            Session.prototype.decorateNavigationBarItem = function (project, fileName, items) {
-                var _this = this;
-                if (!items) {
-                    return undefined;
-                }
-                var compilerService = project.compilerService;
-                return items.map(function (item) { return ({
-                    text: item.text,
-                    kind: item.kind,
-                    kindModifiers: item.kindModifiers,
-                    spans: item.spans.map(function (span) { return ({
-                        start: compilerService.host.positionToLineOffset(fileName, span.start),
-                        end: compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(span))
-                    }); }),
-                    childItems: _this.decorateNavigationBarItem(project, fileName, item.childItems)
-                }); });
-            };
-            Session.prototype.getNavigationBarItems = function (fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var items = compilerService.languageService.getNavigationBarItems(file);
-                if (!items) {
-                    return undefined;
-                }
-                return this.decorateNavigationBarItem(project, fileName, items);
-            };
-            Session.prototype.getNavigateToItems = function (searchValue, fileName, maxResultCount) {
-                var file = ts.normalizePath(fileName);
-                var info = this.projectService.getScriptInfo(file);
-                var projects = this.projectService.findReferencingProjects(info);
-                var defaultProject = projects[0];
-                if (!defaultProject) {
-                    throw Errors.NoProject;
-                }
-                var allNavToItems = server.combineProjectOutput(projects, function (project) {
-                    var compilerService = project.compilerService;
-                    var navItems = compilerService.languageService.getNavigateToItems(searchValue, maxResultCount);
-                    if (!navItems) {
-                        return [];
-                    }
-                    return navItems.map(function (navItem) {
-                        var start = compilerService.host.positionToLineOffset(navItem.fileName, navItem.textSpan.start);
-                        var end = compilerService.host.positionToLineOffset(navItem.fileName, ts.textSpanEnd(navItem.textSpan));
-                        var bakedItem = {
-                            name: navItem.name,
-                            kind: navItem.kind,
-                            file: navItem.fileName,
-                            start: start,
-                            end: end
-                        };
-                        if (navItem.kindModifiers && (navItem.kindModifiers !== "")) {
-                            bakedItem.kindModifiers = navItem.kindModifiers;
-                        }
-                        if (navItem.matchKind !== "none") {
-                            bakedItem.matchKind = navItem.matchKind;
-                        }
-                        if (navItem.containerName && (navItem.containerName.length > 0)) {
-                            bakedItem.containerName = navItem.containerName;
-                        }
-                        if (navItem.containerKind && (navItem.containerKind.length > 0)) {
-                            bakedItem.containerKind = navItem.containerKind;
-                        }
-                        return bakedItem;
-                    });
-                }, undefined, areNavToItemsForTheSameLocation);
-                return allNavToItems;
-                function areNavToItemsForTheSameLocation(a, b) {
-                    if (a && b) {
-                        return a.file === b.file &&
-                            a.start === b.start &&
-                            a.end === b.end;
-                    }
-                    return false;
-                }
-            };
-            Session.prototype.getBraceMatching = function (line, offset, fileName) {
-                var file = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(file);
-                if (!project) {
-                    throw Errors.NoProject;
-                }
-                var compilerService = project.compilerService;
-                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
-                var spans = compilerService.languageService.getBraceMatchingAtPosition(file, position);
-                if (!spans) {
-                    return undefined;
-                }
-                return spans.map(function (span) { return ({
-                    start: compilerService.host.positionToLineOffset(file, span.start),
-                    end: compilerService.host.positionToLineOffset(file, span.start + span.length)
-                }); });
-            };
-            Session.prototype.getDiagnosticsForProject = function (delay, fileName) {
-                var _this = this;
-                var fileNames = this.getProjectInfo(fileName, true).fileNames;
-                var fileNamesInProject = fileNames.filter(function (value, index, array) { return value.indexOf("lib.d.ts") < 0; });
-                var highPriorityFiles = [];
-                var mediumPriorityFiles = [];
-                var lowPriorityFiles = [];
-                var veryLowPriorityFiles = [];
-                var normalizedFileName = ts.normalizePath(fileName);
-                var project = this.projectService.getProjectForFile(normalizedFileName);
-                for (var _i = 0, fileNamesInProject_1 = fileNamesInProject; _i < fileNamesInProject_1.length; _i++) {
-                    var fileNameInProject = fileNamesInProject_1[_i];
-                    if (this.getCanonicalFileName(fileNameInProject) == this.getCanonicalFileName(fileName))
-                        highPriorityFiles.push(fileNameInProject);
-                    else {
-                        var info = this.projectService.getScriptInfo(fileNameInProject);
-                        if (!info.isOpen) {
-                            if (fileNameInProject.indexOf(".d.ts") > 0)
-                                veryLowPriorityFiles.push(fileNameInProject);
-                            else
-                                lowPriorityFiles.push(fileNameInProject);
-                        }
-                        else
-                            mediumPriorityFiles.push(fileNameInProject);
-                    }
-                }
-                fileNamesInProject = highPriorityFiles.concat(mediumPriorityFiles).concat(lowPriorityFiles).concat(veryLowPriorityFiles);
-                if (fileNamesInProject.length > 0) {
-                    var checkList = fileNamesInProject.map(function (fileName) {
-                        var normalizedFileName = ts.normalizePath(fileName);
-                        return { fileName: normalizedFileName, project: project };
-                    });
-                    this.updateErrorCheck(checkList, this.changeSeq, function (n) { return n == _this.changeSeq; }, delay, 200, false);
-                }
-            };
-            Session.prototype.getCanonicalFileName = function (fileName) {
-                var name = this.host.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
-                return ts.normalizePath(name);
-            };
-            Session.prototype.exit = function () {
-            };
-            Session.prototype.addProtocolHandler = function (command, handler) {
-                if (this.handlers[command]) {
-                    throw new Error("Protocol handler already exists for command \"" + command + "\"");
-                }
-                this.handlers[command] = handler;
-            };
-            Session.prototype.executeCommand = function (request) {
-                var handler = this.handlers[request.command];
-                if (handler) {
-                    return handler(request);
-                }
-                else {
-                    this.projectService.log("Unrecognized JSON command: " + JSON.stringify(request));
-                    this.output(undefined, CommandNames.Unknown, request.seq, "Unrecognized JSON command: " + request.command);
-                    return { responseRequired: false };
-                }
-            };
-            Session.prototype.onMessage = function (message) {
-                var start;
-                if (this.logger.isVerbose()) {
-                    this.logger.info("request: " + message);
-                    start = this.hrtime();
-                }
-                var request;
-                try {
-                    request = JSON.parse(message);
-                    var _a = this.executeCommand(request), response = _a.response, responseRequired = _a.responseRequired;
-                    if (this.logger.isVerbose()) {
-                        var elapsed = this.hrtime(start);
-                        var seconds = elapsed[0];
-                        var nanoseconds = elapsed[1];
-                        var elapsedMs = ((1e9 * seconds) + nanoseconds) / 1000000.0;
-                        var leader = "Elapsed time (in milliseconds)";
-                        if (!responseRequired) {
-                            leader = "Async elapsed time (in milliseconds)";
-                        }
-                        this.logger.msg(leader + ": " + elapsedMs.toFixed(4).toString(), "Perf");
-                    }
-                    if (response) {
-                        this.output(response, request.command, request.seq);
-                    }
-                    else if (responseRequired) {
-                        this.output(undefined, request.command, request.seq, "No content available.");
-                    }
-                }
-                catch (err) {
-                    if (err instanceof ts.OperationCanceledException) {
-                    }
-                    this.logError(err, message);
-                    this.output(undefined, request ? request.command : CommandNames.Unknown, request ? request.seq : 0, "Error processing request. " + err.message);
-                }
-            };
-            return Session;
-        }());
-        server.Session = Session;
-    })(server = ts.server || (ts.server = {}));
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    var server;
-    (function (server) {
-        var lineCollectionCapacity = 4;
-        function mergeFormatOptions(formatCodeOptions, formatOptions) {
-            var hasOwnProperty = Object.prototype.hasOwnProperty;
-            Object.keys(formatOptions).forEach(function (key) {
-                var codeKey = key.charAt(0).toUpperCase() + key.substring(1);
-                if (hasOwnProperty.call(formatCodeOptions, codeKey)) {
-                    formatCodeOptions[codeKey] = formatOptions[key];
-                }
-            });
-        }
-        var ScriptInfo = (function () {
-            function ScriptInfo(host, fileName, content, isOpen) {
-                if (isOpen === void 0) { isOpen = false; }
-                this.host = host;
-                this.fileName = fileName;
-                this.content = content;
-                this.isOpen = isOpen;
-                this.children = [];
-                this.formatCodeOptions = ts.clone(CompilerService.getDefaultFormatCodeOptions(this.host));
-                this.path = ts.toPath(fileName, host.getCurrentDirectory(), ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames));
-                this.svc = ScriptVersionCache.fromString(host, content);
-            }
-            ScriptInfo.prototype.setFormatOptions = function (formatOptions) {
-                if (formatOptions) {
-                    mergeFormatOptions(this.formatCodeOptions, formatOptions);
-                }
-            };
-            ScriptInfo.prototype.close = function () {
-                this.isOpen = false;
-            };
-            ScriptInfo.prototype.addChild = function (childInfo) {
-                this.children.push(childInfo);
-            };
-            ScriptInfo.prototype.snap = function () {
-                return this.svc.getSnapshot();
-            };
-            ScriptInfo.prototype.getText = function () {
-                var snap = this.snap();
-                return snap.getText(0, snap.getLength());
-            };
-            ScriptInfo.prototype.getLineInfo = function (line) {
-                var snap = this.snap();
-                return snap.index.lineNumberToInfo(line);
-            };
-            ScriptInfo.prototype.editContent = function (start, end, newText) {
-                this.svc.edit(start, end - start, newText);
-            };
-            ScriptInfo.prototype.getTextChangeRangeBetweenVersions = function (startVersion, endVersion) {
-                return this.svc.getTextChangesBetweenVersions(startVersion, endVersion);
-            };
-            ScriptInfo.prototype.getChangeRange = function (oldSnapshot) {
-                return this.snap().getChangeRange(oldSnapshot);
-            };
-            return ScriptInfo;
-        }());
-        server.ScriptInfo = ScriptInfo;
-        var LSHost = (function () {
-            function LSHost(host, project) {
-                var _this = this;
-                this.host = host;
-                this.project = project;
-                this.roots = [];
-                this.getCanonicalFileName = ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames);
-                this.resolvedModuleNames = ts.createFileMap();
-                this.resolvedTypeReferenceDirectives = ts.createFileMap();
-                this.filenameToScript = ts.createFileMap();
-                this.moduleResolutionHost = {
-                    fileExists: function (fileName) { return _this.fileExists(fileName); },
-                    readFile: function (fileName) { return _this.host.readFile(fileName); },
-                    directoryExists: function (directoryName) { return _this.host.directoryExists(directoryName); }
-                };
-            }
-            LSHost.prototype.resolveNamesWithLocalCache = function (names, containingFile, cache, loader, getResult) {
-                var path = ts.toPath(containingFile, this.host.getCurrentDirectory(), this.getCanonicalFileName);
-                var currentResolutionsInFile = cache.get(path);
-                var newResolutions = {};
-                var resolvedModules = [];
-                var compilerOptions = this.getCompilationSettings();
-                for (var _i = 0, names_2 = names; _i < names_2.length; _i++) {
-                    var name_41 = names_2[_i];
-                    var resolution = ts.lookUp(newResolutions, name_41);
-                    if (!resolution) {
-                        var existingResolution = currentResolutionsInFile && ts.lookUp(currentResolutionsInFile, name_41);
-                        if (moduleResolutionIsValid(existingResolution)) {
-                            resolution = existingResolution;
-                        }
-                        else {
-                            resolution = loader(name_41, containingFile, compilerOptions, this.moduleResolutionHost);
-                            resolution.lastCheckTime = Date.now();
-                            newResolutions[name_41] = resolution;
-                        }
-                    }
-                    ts.Debug.assert(resolution !== undefined);
-                    resolvedModules.push(getResult(resolution));
-                }
-                cache.set(path, newResolutions);
-                return resolvedModules;
-                function moduleResolutionIsValid(resolution) {
-                    if (!resolution) {
-                        return false;
-                    }
-                    if (getResult(resolution)) {
-                        return true;
-                    }
-                    return resolution.failedLookupLocations.length === 0;
-                }
-            };
-            LSHost.prototype.resolveTypeReferenceDirectives = function (typeDirectiveNames, containingFile) {
-                return this.resolveNamesWithLocalCache(typeDirectiveNames, containingFile, this.resolvedTypeReferenceDirectives, ts.resolveTypeReferenceDirective, function (m) { return m.resolvedTypeReferenceDirective; });
-            };
-            LSHost.prototype.resolveModuleNames = function (moduleNames, containingFile) {
-                return this.resolveNamesWithLocalCache(moduleNames, containingFile, this.resolvedModuleNames, ts.resolveModuleName, function (m) { return m.resolvedModule; });
-            };
-            LSHost.prototype.getDefaultLibFileName = function () {
-                var nodeModuleBinDir = ts.getDirectoryPath(ts.normalizePath(this.host.getExecutingFilePath()));
-                return ts.combinePaths(nodeModuleBinDir, ts.getDefaultLibFileName(this.compilationSettings));
-            };
-            LSHost.prototype.getScriptSnapshot = function (filename) {
-                var scriptInfo = this.getScriptInfo(filename);
-                if (scriptInfo) {
-                    return scriptInfo.snap();
-                }
-            };
-            LSHost.prototype.setCompilationSettings = function (opt) {
-                this.compilationSettings = opt;
-                this.resolvedModuleNames.clear();
-                this.resolvedTypeReferenceDirectives.clear();
-            };
-            LSHost.prototype.lineAffectsRefs = function (filename, line) {
-                var info = this.getScriptInfo(filename);
-                var lineInfo = info.getLineInfo(line);
-                if (lineInfo && lineInfo.text) {
-                    var regex = /reference|import|\/\*|\*\//;
-                    return regex.test(lineInfo.text);
-                }
-            };
-            LSHost.prototype.getCompilationSettings = function () {
-                return this.compilationSettings;
-            };
-            LSHost.prototype.getScriptFileNames = function () {
-                return this.roots.map(function (root) { return root.fileName; });
-            };
-            LSHost.prototype.getScriptKind = function (fileName) {
-                var info = this.getScriptInfo(fileName);
-                if (!info) {
-                    return undefined;
-                }
-                if (!info.scriptKind) {
-                    info.scriptKind = ts.getScriptKindFromFileName(fileName);
-                }
-                return info.scriptKind;
-            };
-            LSHost.prototype.getScriptVersion = function (filename) {
-                return this.getScriptInfo(filename).svc.latestVersion().toString();
-            };
-            LSHost.prototype.getCurrentDirectory = function () {
-                return "";
-            };
-            LSHost.prototype.getScriptIsOpen = function (filename) {
-                return this.getScriptInfo(filename).isOpen;
-            };
-            LSHost.prototype.removeReferencedFile = function (info) {
-                if (!info.isOpen) {
-                    this.filenameToScript.remove(info.path);
-                    this.resolvedModuleNames.remove(info.path);
-                    this.resolvedTypeReferenceDirectives.remove(info.path);
-                }
-            };
-            LSHost.prototype.getScriptInfo = function (filename) {
-                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
-                var scriptInfo = this.filenameToScript.get(path);
-                if (!scriptInfo) {
-                    scriptInfo = this.project.openReferencedFile(filename);
-                    if (scriptInfo) {
-                        this.filenameToScript.set(path, scriptInfo);
-                    }
-                }
-                return scriptInfo;
-            };
-            LSHost.prototype.addRoot = function (info) {
-                if (!this.filenameToScript.contains(info.path)) {
-                    this.filenameToScript.set(info.path, info);
-                    this.roots.push(info);
-                }
-            };
-            LSHost.prototype.removeRoot = function (info) {
-                if (!this.filenameToScript.contains(info.path)) {
-                    this.filenameToScript.remove(info.path);
-                    this.roots = copyListRemovingItem(info, this.roots);
-                    this.resolvedModuleNames.remove(info.path);
-                    this.resolvedTypeReferenceDirectives.remove(info.path);
-                }
-            };
-            LSHost.prototype.saveTo = function (filename, tmpfilename) {
-                var script = this.getScriptInfo(filename);
-                if (script) {
-                    var snap = script.snap();
-                    this.host.writeFile(tmpfilename, snap.getText(0, snap.getLength()));
-                }
-            };
-            LSHost.prototype.reloadScript = function (filename, tmpfilename, cb) {
-                var script = this.getScriptInfo(filename);
-                if (script) {
-                    script.svc.reloadFromFile(tmpfilename, cb);
-                }
-            };
-            LSHost.prototype.editScript = function (filename, start, end, newText) {
-                var script = this.getScriptInfo(filename);
-                if (script) {
-                    script.editContent(start, end, newText);
-                    return;
-                }
-                throw new Error("No script with name '" + filename + "'");
-            };
-            LSHost.prototype.resolvePath = function (path) {
-                var result = this.host.resolvePath(path);
-                return result;
-            };
-            LSHost.prototype.fileExists = function (path) {
-                var result = this.host.fileExists(path);
-                return result;
-            };
-            LSHost.prototype.directoryExists = function (path) {
-                return this.host.directoryExists(path);
-            };
-            LSHost.prototype.lineToTextSpan = function (filename, line) {
-                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
-                var script = this.filenameToScript.get(path);
-                var index = script.snap().index;
-                var lineInfo = index.lineNumberToInfo(line + 1);
-                var len;
-                if (lineInfo.leaf) {
-                    len = lineInfo.leaf.text.length;
-                }
-                else {
-                    var nextLineInfo = index.lineNumberToInfo(line + 2);
-                    len = nextLineInfo.offset - lineInfo.offset;
-                }
-                return ts.createTextSpan(lineInfo.offset, len);
-            };
-            LSHost.prototype.lineOffsetToPosition = function (filename, line, offset) {
-                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
-                var script = this.filenameToScript.get(path);
-                var index = script.snap().index;
-                var lineInfo = index.lineNumberToInfo(line);
-                return (lineInfo.offset + offset - 1);
-            };
-            LSHost.prototype.positionToLineOffset = function (filename, position) {
-                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
-                var script = this.filenameToScript.get(path);
-                var index = script.snap().index;
-                var lineOffset = index.charOffsetToLineNumberAndPos(position);
-                return { line: lineOffset.line, offset: lineOffset.offset + 1 };
-            };
-            return LSHost;
-        }());
-        server.LSHost = LSHost;
-        var Project = (function () {
-            function Project(projectService, projectOptions) {
-                this.projectService = projectService;
-                this.projectOptions = projectOptions;
-                this.directoriesWatchedForTsconfig = [];
-                this.filenameToSourceFile = {};
-                this.updateGraphSeq = 0;
-                this.openRefCount = 0;
-                if (projectOptions && projectOptions.files) {
-                    projectOptions.compilerOptions.allowNonTsExtensions = true;
-                }
-                this.compilerService = new CompilerService(this, projectOptions && projectOptions.compilerOptions);
-            }
-            Project.prototype.addOpenRef = function () {
-                this.openRefCount++;
-            };
-            Project.prototype.deleteOpenRef = function () {
-                this.openRefCount--;
-                return this.openRefCount;
-            };
-            Project.prototype.openReferencedFile = function (filename) {
-                return this.projectService.openFile(filename, false);
-            };
-            Project.prototype.getRootFiles = function () {
-                return this.compilerService.host.roots.map(function (info) { return info.fileName; });
-            };
-            Project.prototype.getFileNames = function () {
-                var sourceFiles = this.program.getSourceFiles();
-                return sourceFiles.map(function (sourceFile) { return sourceFile.fileName; });
-            };
-            Project.prototype.getSourceFile = function (info) {
-                return this.filenameToSourceFile[info.fileName];
-            };
-            Project.prototype.getSourceFileFromName = function (filename, requireOpen) {
-                var info = this.projectService.getScriptInfo(filename);
-                if (info) {
-                    if ((!requireOpen) || info.isOpen) {
-                        return this.getSourceFile(info);
-                    }
-                }
-            };
-            Project.prototype.isRoot = function (info) {
-                return this.compilerService.host.roots.some(function (root) { return root === info; });
-            };
-            Project.prototype.removeReferencedFile = function (info) {
-                this.compilerService.host.removeReferencedFile(info);
-                this.updateGraph();
-            };
-            Project.prototype.updateFileMap = function () {
-                this.filenameToSourceFile = {};
-                var sourceFiles = this.program.getSourceFiles();
-                for (var i = 0, len = sourceFiles.length; i < len; i++) {
-                    var normFilename = ts.normalizePath(sourceFiles[i].fileName);
-                    this.filenameToSourceFile[normFilename] = sourceFiles[i];
-                }
-            };
-            Project.prototype.finishGraph = function () {
-                this.updateGraph();
-                this.compilerService.languageService.getNavigateToItems(".*");
-            };
-            Project.prototype.updateGraph = function () {
-                this.program = this.compilerService.languageService.getProgram();
-                this.updateFileMap();
-            };
-            Project.prototype.isConfiguredProject = function () {
-                return this.projectFilename;
-            };
-            Project.prototype.addRoot = function (info) {
-                this.compilerService.host.addRoot(info);
-            };
-            Project.prototype.removeRoot = function (info) {
-                this.compilerService.host.removeRoot(info);
-            };
-            Project.prototype.filesToString = function () {
-                var strBuilder = "";
-                ts.forEachValue(this.filenameToSourceFile, function (sourceFile) { strBuilder += sourceFile.fileName + "\n"; });
-                return strBuilder;
-            };
-            Project.prototype.setProjectOptions = function (projectOptions) {
-                this.projectOptions = projectOptions;
-                if (projectOptions.compilerOptions) {
-                    projectOptions.compilerOptions.allowNonTsExtensions = true;
-                    this.compilerService.setCompilerOptions(projectOptions.compilerOptions);
-                }
-            };
-            return Project;
-        }());
-        server.Project = Project;
-        function copyListRemovingItem(item, list) {
-            var copiedList = [];
-            for (var i = 0, len = list.length; i < len; i++) {
-                if (list[i] != item) {
-                    copiedList.push(list[i]);
-                }
-            }
-            return copiedList;
-        }
-        function combineProjectOutput(projects, action, comparer, areEqual) {
-            var result = projects.reduce(function (previous, current) { return ts.concatenate(previous, action(current)); }, []).sort(comparer);
-            return projects.length > 1 ? ts.deduplicate(result, areEqual) : result;
-        }
-        server.combineProjectOutput = combineProjectOutput;
-        var ProjectService = (function () {
-            function ProjectService(host, psLogger, eventHandler) {
-                this.host = host;
-                this.psLogger = psLogger;
-                this.eventHandler = eventHandler;
-                this.filenameToScriptInfo = {};
-                this.openFileRoots = [];
-                this.inferredProjects = [];
-                this.configuredProjects = [];
-                this.openFilesReferenced = [];
-                this.openFileRootsConfigured = [];
-                this.directoryWatchersForTsconfig = {};
-                this.directoryWatchersRefCount = {};
-                this.timerForDetectingProjectFileListChanges = {};
-                this.addDefaultHostConfiguration();
-            }
-            ProjectService.prototype.addDefaultHostConfiguration = function () {
-                this.hostConfiguration = {
-                    formatCodeOptions: ts.clone(CompilerService.getDefaultFormatCodeOptions(this.host)),
-                    hostInfo: "Unknown host"
-                };
-            };
-            ProjectService.prototype.getFormatCodeOptions = function (file) {
-                if (file) {
-                    var info = this.filenameToScriptInfo[file];
-                    if (info) {
-                        return info.formatCodeOptions;
-                    }
-                }
-                return this.hostConfiguration.formatCodeOptions;
-            };
-            ProjectService.prototype.watchedFileChanged = function (fileName) {
-                var info = this.filenameToScriptInfo[fileName];
-                if (!info) {
-                    this.psLogger.info("Error: got watch notification for unknown file: " + fileName);
-                }
-                if (!this.host.fileExists(fileName)) {
-                    this.fileDeletedInFilesystem(info);
-                }
-                else {
-                    if (info && (!info.isOpen)) {
-                        info.svc.reloadFromFile(info.fileName);
-                    }
-                }
-            };
-            ProjectService.prototype.directoryWatchedForSourceFilesChanged = function (project, fileName) {
-                if (fileName && !ts.isSupportedSourceFileName(fileName, project.projectOptions ? project.projectOptions.compilerOptions : undefined)) {
-                    return;
-                }
-                this.log("Detected source file changes: " + fileName);
-                this.startTimerForDetectingProjectFileListChanges(project);
-            };
-            ProjectService.prototype.startTimerForDetectingProjectFileListChanges = function (project) {
-                var _this = this;
-                if (this.timerForDetectingProjectFileListChanges[project.projectFilename]) {
-                    this.host.clearTimeout(this.timerForDetectingProjectFileListChanges[project.projectFilename]);
-                }
-                this.timerForDetectingProjectFileListChanges[project.projectFilename] = this.host.setTimeout(function () { return _this.handleProjectFileListChanges(project); }, 250);
-            };
-            ProjectService.prototype.handleProjectFileListChanges = function (project) {
-                var _this = this;
-                var projectOptions = this.configFileToProjectOptions(project.projectFilename).projectOptions;
-                var newRootFiles = projectOptions.files.map((function (f) { return _this.getCanonicalFileName(f); }));
-                var currentRootFiles = project.getRootFiles().map((function (f) { return _this.getCanonicalFileName(f); }));
-                if (!ts.arrayIsEqualTo(currentRootFiles && currentRootFiles.sort(), newRootFiles && newRootFiles.sort())) {
-                    this.updateConfiguredProject(project);
-                    this.updateProjectStructure();
-                }
-            };
-            ProjectService.prototype.directoryWatchedForTsconfigChanged = function (fileName) {
-                var _this = this;
-                if (ts.getBaseFileName(fileName) != "tsconfig.json") {
-                    this.log(fileName + " is not tsconfig.json");
-                    return;
-                }
-                this.log("Detected newly added tsconfig file: " + fileName);
-                var projectOptions = this.configFileToProjectOptions(fileName).projectOptions;
-                var rootFilesInTsconfig = projectOptions.files.map(function (f) { return _this.getCanonicalFileName(f); });
-                var openFileRoots = this.openFileRoots.map(function (s) { return _this.getCanonicalFileName(s.fileName); });
-                for (var _i = 0, openFileRoots_1 = openFileRoots; _i < openFileRoots_1.length; _i++) {
-                    var openFileRoot = openFileRoots_1[_i];
-                    if (rootFilesInTsconfig.indexOf(openFileRoot) >= 0) {
-                        this.reloadProjects();
-                        return;
-                    }
-                }
-            };
-            ProjectService.prototype.getCanonicalFileName = function (fileName) {
-                var name = this.host.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
-                return ts.normalizePath(name);
-            };
-            ProjectService.prototype.watchedProjectConfigFileChanged = function (project) {
-                this.log("Config file changed: " + project.projectFilename);
-                this.updateConfiguredProject(project);
-                this.updateProjectStructure();
-            };
-            ProjectService.prototype.log = function (msg, type) {
-                if (type === void 0) { type = "Err"; }
-                this.psLogger.msg(msg, type);
-            };
-            ProjectService.prototype.setHostConfiguration = function (args) {
-                if (args.file) {
-                    var info = this.filenameToScriptInfo[args.file];
-                    if (info) {
-                        info.setFormatOptions(args.formatOptions);
-                        this.log("Host configuration update for file " + args.file, "Info");
-                    }
-                }
-                else {
-                    if (args.hostInfo !== undefined) {
-                        this.hostConfiguration.hostInfo = args.hostInfo;
-                        this.log("Host information " + args.hostInfo, "Info");
-                    }
-                    if (args.formatOptions) {
-                        mergeFormatOptions(this.hostConfiguration.formatCodeOptions, args.formatOptions);
-                        this.log("Format host information updated", "Info");
-                    }
-                }
-            };
-            ProjectService.prototype.closeLog = function () {
-                this.psLogger.close();
-            };
-            ProjectService.prototype.createInferredProject = function (root) {
-                var _this = this;
-                var project = new Project(this);
-                project.addRoot(root);
-                var currentPath = ts.getDirectoryPath(root.fileName);
-                var parentPath = ts.getDirectoryPath(currentPath);
-                while (currentPath != parentPath) {
-                    if (!project.projectService.directoryWatchersForTsconfig[currentPath]) {
-                        this.log("Add watcher for: " + currentPath);
-                        project.projectService.directoryWatchersForTsconfig[currentPath] =
-                            this.host.watchDirectory(currentPath, function (fileName) { return _this.directoryWatchedForTsconfigChanged(fileName); });
-                        project.projectService.directoryWatchersRefCount[currentPath] = 1;
-                    }
-                    else {
-                        project.projectService.directoryWatchersRefCount[currentPath] += 1;
-                    }
-                    project.directoriesWatchedForTsconfig.push(currentPath);
-                    currentPath = parentPath;
-                    parentPath = ts.getDirectoryPath(parentPath);
-                }
-                project.finishGraph();
-                this.inferredProjects.push(project);
-                return project;
-            };
-            ProjectService.prototype.fileDeletedInFilesystem = function (info) {
-                this.psLogger.info(info.fileName + " deleted");
-                if (info.fileWatcher) {
-                    info.fileWatcher.close();
-                    info.fileWatcher = undefined;
-                }
-                if (!info.isOpen) {
-                    this.filenameToScriptInfo[info.fileName] = undefined;
-                    var referencingProjects = this.findReferencingProjects(info);
-                    if (info.defaultProject) {
-                        info.defaultProject.removeRoot(info);
-                    }
-                    for (var i = 0, len = referencingProjects.length; i < len; i++) {
-                        referencingProjects[i].removeReferencedFile(info);
-                    }
-                    for (var j = 0, flen = this.openFileRoots.length; j < flen; j++) {
-                        var openFile = this.openFileRoots[j];
-                        if (this.eventHandler) {
-                            this.eventHandler("context", openFile.defaultProject, openFile.fileName);
-                        }
-                    }
-                    for (var j = 0, flen = this.openFilesReferenced.length; j < flen; j++) {
-                        var openFile = this.openFilesReferenced[j];
-                        if (this.eventHandler) {
-                            this.eventHandler("context", openFile.defaultProject, openFile.fileName);
-                        }
-                    }
-                }
-                this.printProjects();
-            };
-            ProjectService.prototype.updateConfiguredProjectList = function () {
-                var configuredProjects = [];
-                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
-                    if (this.configuredProjects[i].openRefCount > 0) {
-                        configuredProjects.push(this.configuredProjects[i]);
-                    }
-                }
-                this.configuredProjects = configuredProjects;
-            };
-            ProjectService.prototype.removeProject = function (project) {
-                this.log("remove project: " + project.getRootFiles().toString());
-                if (project.isConfiguredProject()) {
-                    project.projectFileWatcher.close();
-                    project.directoryWatcher.close();
-                    this.configuredProjects = copyListRemovingItem(project, this.configuredProjects);
-                }
-                else {
-                    for (var _i = 0, _a = project.directoriesWatchedForTsconfig; _i < _a.length; _i++) {
-                        var directory = _a[_i];
-                        project.projectService.directoryWatchersRefCount[directory]--;
-                        if (!project.projectService.directoryWatchersRefCount[directory]) {
-                            this.log("Close directory watcher for: " + directory);
-                            project.projectService.directoryWatchersForTsconfig[directory].close();
-                            delete project.projectService.directoryWatchersForTsconfig[directory];
-                        }
-                    }
-                    this.inferredProjects = copyListRemovingItem(project, this.inferredProjects);
-                }
-                var fileNames = project.getFileNames();
-                for (var _b = 0, fileNames_2 = fileNames; _b < fileNames_2.length; _b++) {
-                    var fileName = fileNames_2[_b];
-                    var info = this.getScriptInfo(fileName);
-                    if (info.defaultProject == project) {
-                        info.defaultProject = undefined;
-                    }
-                }
-            };
-            ProjectService.prototype.setConfiguredProjectRoot = function (info) {
-                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
-                    var configuredProject = this.configuredProjects[i];
-                    if (configuredProject.isRoot(info)) {
-                        info.defaultProject = configuredProject;
-                        configuredProject.addOpenRef();
-                        return true;
-                    }
-                }
-                return false;
-            };
-            ProjectService.prototype.addOpenFile = function (info) {
-                if (this.setConfiguredProjectRoot(info)) {
-                    this.openFileRootsConfigured.push(info);
-                }
-                else {
-                    this.findReferencingProjects(info);
-                    if (info.defaultProject) {
-                        this.openFilesReferenced.push(info);
-                    }
-                    else {
-                        info.defaultProject = this.createInferredProject(info);
-                        var openFileRoots = [];
-                        for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
-                            var r = this.openFileRoots[i];
-                            if (info.defaultProject.getSourceFile(r)) {
-                                this.removeProject(r.defaultProject);
-                                this.openFilesReferenced.push(r);
-                                r.defaultProject = info.defaultProject;
-                            }
-                            else {
-                                openFileRoots.push(r);
-                            }
-                        }
-                        this.openFileRoots = openFileRoots;
-                        this.openFileRoots.push(info);
-                    }
-                }
-                this.updateConfiguredProjectList();
-            };
-            ProjectService.prototype.closeOpenFile = function (info) {
-                info.svc.reloadFromFile(info.fileName);
-                var openFileRoots = [];
-                var removedProject;
-                for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
-                    if (info === this.openFileRoots[i]) {
-                        removedProject = info.defaultProject;
-                    }
-                    else {
-                        openFileRoots.push(this.openFileRoots[i]);
-                    }
-                }
-                this.openFileRoots = openFileRoots;
-                if (!removedProject) {
-                    var openFileRootsConfigured = [];
-                    for (var i = 0, len = this.openFileRootsConfigured.length; i < len; i++) {
-                        if (info === this.openFileRootsConfigured[i]) {
-                            if (info.defaultProject.deleteOpenRef() === 0) {
-                                removedProject = info.defaultProject;
-                            }
-                        }
-                        else {
-                            openFileRootsConfigured.push(this.openFileRootsConfigured[i]);
-                        }
-                    }
-                    this.openFileRootsConfigured = openFileRootsConfigured;
-                }
-                if (removedProject) {
-                    this.removeProject(removedProject);
-                    var openFilesReferenced = [];
-                    var orphanFiles = [];
-                    for (var i = 0, len = this.openFilesReferenced.length; i < len; i++) {
-                        var f = this.openFilesReferenced[i];
-                        if (f.defaultProject === removedProject || !f.defaultProject) {
-                            f.defaultProject = undefined;
-                            orphanFiles.push(f);
-                        }
-                        else {
-                            openFilesReferenced.push(f);
-                        }
-                    }
-                    this.openFilesReferenced = openFilesReferenced;
-                    for (var i = 0, len = orphanFiles.length; i < len; i++) {
-                        this.addOpenFile(orphanFiles[i]);
-                    }
-                }
-                else {
-                    this.openFilesReferenced = copyListRemovingItem(info, this.openFilesReferenced);
-                }
-                info.close();
-            };
-            ProjectService.prototype.findReferencingProjects = function (info, excludedProject) {
-                var referencingProjects = [];
-                info.defaultProject = undefined;
-                for (var i = 0, len = this.inferredProjects.length; i < len; i++) {
-                    var inferredProject = this.inferredProjects[i];
-                    inferredProject.updateGraph();
-                    if (inferredProject !== excludedProject) {
-                        if (inferredProject.getSourceFile(info)) {
-                            info.defaultProject = inferredProject;
-                            referencingProjects.push(inferredProject);
-                        }
-                    }
-                }
-                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
-                    var configuredProject = this.configuredProjects[i];
-                    configuredProject.updateGraph();
-                    if (configuredProject.getSourceFile(info)) {
-                        info.defaultProject = configuredProject;
-                        referencingProjects.push(configuredProject);
-                    }
-                }
-                return referencingProjects;
-            };
-            ProjectService.prototype.reloadProjects = function () {
-                this.log("reload projects.");
-                for (var _i = 0, _a = this.openFileRoots; _i < _a.length; _i++) {
-                    var info = _a[_i];
-                    this.openOrUpdateConfiguredProjectForFile(info.fileName);
-                }
-                this.updateProjectStructure();
-            };
-            ProjectService.prototype.updateProjectStructure = function () {
-                this.log("updating project structure from ...", "Info");
-                this.printProjects();
-                var unattachedOpenFiles = [];
-                var openFileRootsConfigured = [];
-                for (var _i = 0, _a = this.openFileRootsConfigured; _i < _a.length; _i++) {
-                    var info = _a[_i];
-                    var project = info.defaultProject;
-                    if (!project || !(project.getSourceFile(info))) {
-                        info.defaultProject = undefined;
-                        unattachedOpenFiles.push(info);
-                    }
-                    else {
-                        openFileRootsConfigured.push(info);
-                    }
-                }
-                this.openFileRootsConfigured = openFileRootsConfigured;
-                var openFilesReferenced = [];
-                for (var i = 0, len = this.openFilesReferenced.length; i < len; i++) {
-                    var referencedFile = this.openFilesReferenced[i];
-                    referencedFile.defaultProject.updateGraph();
-                    var sourceFile = referencedFile.defaultProject.getSourceFile(referencedFile);
-                    if (sourceFile) {
-                        openFilesReferenced.push(referencedFile);
-                    }
-                    else {
-                        unattachedOpenFiles.push(referencedFile);
-                    }
-                }
-                this.openFilesReferenced = openFilesReferenced;
-                var openFileRoots = [];
-                for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
-                    var rootFile = this.openFileRoots[i];
-                    var rootedProject = rootFile.defaultProject;
-                    var referencingProjects = this.findReferencingProjects(rootFile, rootedProject);
-                    if (rootFile.defaultProject && rootFile.defaultProject.isConfiguredProject()) {
-                        if (!rootedProject.isConfiguredProject()) {
-                            this.removeProject(rootedProject);
-                        }
-                        this.openFileRootsConfigured.push(rootFile);
-                    }
-                    else {
-                        if (referencingProjects.length === 0) {
-                            rootFile.defaultProject = rootedProject;
-                            openFileRoots.push(rootFile);
-                        }
-                        else {
-                            this.removeProject(rootedProject);
-                            this.openFilesReferenced.push(rootFile);
-                        }
-                    }
-                }
-                this.openFileRoots = openFileRoots;
-                for (var i = 0, len = unattachedOpenFiles.length; i < len; i++) {
-                    this.addOpenFile(unattachedOpenFiles[i]);
-                }
-                this.printProjects();
-            };
-            ProjectService.prototype.getScriptInfo = function (filename) {
-                filename = ts.normalizePath(filename);
-                return ts.lookUp(this.filenameToScriptInfo, filename);
-            };
-            ProjectService.prototype.openFile = function (fileName, openedByClient, fileContent, scriptKind) {
-                var _this = this;
-                fileName = ts.normalizePath(fileName);
-                var info = ts.lookUp(this.filenameToScriptInfo, fileName);
-                if (!info) {
-                    var content = void 0;
-                    if (this.host.fileExists(fileName)) {
-                        content = fileContent || this.host.readFile(fileName);
-                    }
-                    if (!content) {
-                        if (openedByClient) {
-                            content = "";
-                        }
-                    }
-                    if (content !== undefined) {
-                        info = new ScriptInfo(this.host, fileName, content, openedByClient);
-                        info.scriptKind = scriptKind;
-                        info.setFormatOptions(this.getFormatCodeOptions());
-                        this.filenameToScriptInfo[fileName] = info;
-                        if (!info.isOpen) {
-                            info.fileWatcher = this.host.watchFile(fileName, function (_) { _this.watchedFileChanged(fileName); });
-                        }
-                    }
-                }
-                if (info) {
-                    if (fileContent) {
-                        info.svc.reload(fileContent);
-                    }
-                    if (openedByClient) {
-                        info.isOpen = true;
-                    }
-                }
-                return info;
-            };
-            ProjectService.prototype.findConfigFile = function (searchPath) {
-                while (true) {
-                    var tsconfigFileName = ts.combinePaths(searchPath, "tsconfig.json");
-                    if (this.host.fileExists(tsconfigFileName)) {
-                        return tsconfigFileName;
-                    }
-                    var jsconfigFileName = ts.combinePaths(searchPath, "jsconfig.json");
-                    if (this.host.fileExists(jsconfigFileName)) {
-                        return jsconfigFileName;
-                    }
-                    var parentPath = ts.getDirectoryPath(searchPath);
-                    if (parentPath === searchPath) {
-                        break;
-                    }
-                    searchPath = parentPath;
-                }
-                return undefined;
-            };
-            ProjectService.prototype.openClientFile = function (fileName, fileContent, scriptKind) {
-                var _a = this.openOrUpdateConfiguredProjectForFile(fileName), configFileName = _a.configFileName, configFileErrors = _a.configFileErrors;
-                var info = this.openFile(fileName, true, fileContent, scriptKind);
-                this.addOpenFile(info);
-                this.printProjects();
-                return { configFileName: configFileName, configFileErrors: configFileErrors };
-            };
-            ProjectService.prototype.openOrUpdateConfiguredProjectForFile = function (fileName) {
-                var searchPath = ts.normalizePath(ts.getDirectoryPath(fileName));
-                this.log("Search path: " + searchPath, "Info");
-                var configFileName = this.findConfigFile(searchPath);
-                if (configFileName) {
-                    this.log("Config file name: " + configFileName, "Info");
-                    var project = this.findConfiguredProjectByConfigFile(configFileName);
-                    if (!project) {
-                        var configResult = this.openConfigFile(configFileName, fileName);
-                        if (!configResult.success) {
-                            return { configFileName: configFileName, configFileErrors: configResult.errors };
-                        }
-                        else {
-                            this.log("Opened configuration file " + configFileName, "Info");
-                            this.configuredProjects.push(configResult.project);
-                            if (configResult.errors && configResult.errors.length > 0) {
-                                return { configFileName: configFileName, configFileErrors: configResult.errors };
-                            }
-                        }
-                    }
-                    else {
-                        this.updateConfiguredProject(project);
-                    }
-                }
-                else {
-                    this.log("No config files found.");
-                }
-                return {};
-            };
-            ProjectService.prototype.closeClientFile = function (filename) {
-                var info = ts.lookUp(this.filenameToScriptInfo, filename);
-                if (info) {
-                    this.closeOpenFile(info);
-                    info.isOpen = false;
-                }
-                this.printProjects();
-            };
-            ProjectService.prototype.getProjectForFile = function (filename) {
-                var scriptInfo = ts.lookUp(this.filenameToScriptInfo, filename);
-                if (scriptInfo) {
-                    return scriptInfo.defaultProject;
-                }
-            };
-            ProjectService.prototype.printProjectsForFile = function (filename) {
-                var scriptInfo = ts.lookUp(this.filenameToScriptInfo, filename);
-                if (scriptInfo) {
-                    this.psLogger.startGroup();
-                    this.psLogger.info("Projects for " + filename);
-                    var projects = this.findReferencingProjects(scriptInfo);
-                    for (var i = 0, len = projects.length; i < len; i++) {
-                        this.psLogger.info("Project " + i.toString());
-                    }
-                    this.psLogger.endGroup();
-                }
-                else {
-                    this.psLogger.info(filename + " not in any project");
-                }
-            };
-            ProjectService.prototype.printProjects = function () {
-                if (!this.psLogger.isVerbose()) {
-                    return;
-                }
-                this.psLogger.startGroup();
-                for (var i = 0, len = this.inferredProjects.length; i < len; i++) {
-                    var project = this.inferredProjects[i];
-                    project.updateGraph();
-                    this.psLogger.info("Project " + i.toString());
-                    this.psLogger.info(project.filesToString());
-                    this.psLogger.info("-----------------------------------------------");
-                }
-                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
-                    var project = this.configuredProjects[i];
-                    project.updateGraph();
-                    this.psLogger.info("Project (configured) " + (i + this.inferredProjects.length).toString());
-                    this.psLogger.info(project.filesToString());
-                    this.psLogger.info("-----------------------------------------------");
-                }
-                this.psLogger.info("Open file roots of inferred projects: ");
-                for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
-                    this.psLogger.info(this.openFileRoots[i].fileName);
-                }
-                this.psLogger.info("Open files referenced by inferred or configured projects: ");
-                for (var i = 0, len = this.openFilesReferenced.length; i < len; i++) {
-                    var fileInfo = this.openFilesReferenced[i].fileName;
-                    if (this.openFilesReferenced[i].defaultProject.isConfiguredProject()) {
-                        fileInfo += " (configured)";
-                    }
-                    this.psLogger.info(fileInfo);
-                }
-                this.psLogger.info("Open file roots of configured projects: ");
-                for (var i = 0, len = this.openFileRootsConfigured.length; i < len; i++) {
-                    this.psLogger.info(this.openFileRootsConfigured[i].fileName);
-                }
-                this.psLogger.endGroup();
-            };
-            ProjectService.prototype.configProjectIsActive = function (fileName) {
-                return this.findConfiguredProjectByConfigFile(fileName) === undefined;
-            };
-            ProjectService.prototype.findConfiguredProjectByConfigFile = function (configFileName) {
-                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
-                    if (this.configuredProjects[i].projectFilename == configFileName) {
-                        return this.configuredProjects[i];
-                    }
-                }
-                return undefined;
-            };
-            ProjectService.prototype.configFileToProjectOptions = function (configFilename) {
-                configFilename = ts.normalizePath(configFilename);
-                var dirPath = ts.getDirectoryPath(configFilename);
-                var contents = this.host.readFile(configFilename);
-                var rawConfig = ts.parseConfigFileTextToJson(configFilename, contents);
-                if (rawConfig.error) {
-                    return { succeeded: false, errors: [rawConfig.error] };
-                }
-                else {
-                    var parsedCommandLine = ts.parseJsonConfigFileContent(rawConfig.config, this.host, dirPath, {}, configFilename);
-                    ts.Debug.assert(!!parsedCommandLine.fileNames);
-                    if (parsedCommandLine.errors && (parsedCommandLine.errors.length > 0)) {
-                        return { succeeded: false, errors: parsedCommandLine.errors };
-                    }
-                    else if (parsedCommandLine.fileNames.length === 0) {
-                        var error = ts.createCompilerDiagnostic(ts.Diagnostics.The_config_file_0_found_doesn_t_contain_any_source_files, configFilename);
-                        return { succeeded: false, errors: [error] };
-                    }
-                    else {
-                        var projectOptions = {
-                            files: parsedCommandLine.fileNames,
-                            compilerOptions: parsedCommandLine.options
-                        };
-                        return { succeeded: true, projectOptions: projectOptions };
-                    }
-                }
-            };
-            ProjectService.prototype.openConfigFile = function (configFilename, clientFileName) {
-                var _this = this;
-                var _a = this.configFileToProjectOptions(configFilename), succeeded = _a.succeeded, projectOptions = _a.projectOptions, errors = _a.errors;
-                if (!succeeded) {
-                    return { success: false, errors: errors };
-                }
-                else {
-                    var project_1 = this.createProject(configFilename, projectOptions);
-                    var errors_1;
-                    for (var _i = 0, _b = projectOptions.files; _i < _b.length; _i++) {
-                        var rootFilename = _b[_i];
-                        if (this.host.fileExists(rootFilename)) {
-                            var info = this.openFile(rootFilename, clientFileName == rootFilename);
-                            project_1.addRoot(info);
-                        }
-                        else {
-                            (errors_1 || (errors_1 = [])).push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, rootFilename));
-                        }
-                    }
-                    project_1.finishGraph();
-                    project_1.projectFileWatcher = this.host.watchFile(configFilename, function (_) { return _this.watchedProjectConfigFileChanged(project_1); });
-                    this.log("Add recursive watcher for: " + ts.getDirectoryPath(configFilename));
-                    project_1.directoryWatcher = this.host.watchDirectory(ts.getDirectoryPath(configFilename), function (path) { return _this.directoryWatchedForSourceFilesChanged(project_1, path); }, true);
-                    return { success: true, project: project_1, errors: errors_1 };
-                }
-            };
-            ProjectService.prototype.updateConfiguredProject = function (project) {
-                var _this = this;
-                if (!this.host.fileExists(project.projectFilename)) {
-                    this.log("Config file deleted");
-                    this.removeProject(project);
-                }
-                else {
-                    var _a = this.configFileToProjectOptions(project.projectFilename), succeeded = _a.succeeded, projectOptions = _a.projectOptions, errors = _a.errors;
-                    if (!succeeded) {
-                        return errors;
-                    }
-                    else {
-                        var oldFileNames_1 = project.compilerService.host.roots.map(function (info) { return info.fileName; });
-                        var newFileNames_1 = ts.filter(projectOptions.files, function (f) { return _this.host.fileExists(f); });
-                        var fileNamesToRemove = oldFileNames_1.filter(function (f) { return newFileNames_1.indexOf(f) < 0; });
-                        var fileNamesToAdd = newFileNames_1.filter(function (f) { return oldFileNames_1.indexOf(f) < 0; });
-                        for (var _i = 0, fileNamesToRemove_1 = fileNamesToRemove; _i < fileNamesToRemove_1.length; _i++) {
-                            var fileName = fileNamesToRemove_1[_i];
-                            var info = this.getScriptInfo(fileName);
-                            if (info) {
-                                project.removeRoot(info);
-                            }
-                        }
-                        for (var _b = 0, fileNamesToAdd_1 = fileNamesToAdd; _b < fileNamesToAdd_1.length; _b++) {
-                            var fileName = fileNamesToAdd_1[_b];
-                            var info = this.getScriptInfo(fileName);
-                            if (!info) {
-                                info = this.openFile(fileName, false);
-                            }
-                            else {
-                                if (info.isOpen) {
-                                    if (this.openFileRoots.indexOf(info) >= 0) {
-                                        this.openFileRoots = copyListRemovingItem(info, this.openFileRoots);
-                                        if (info.defaultProject && !info.defaultProject.isConfiguredProject()) {
-                                            this.removeProject(info.defaultProject);
-                                        }
-                                    }
-                                    if (this.openFilesReferenced.indexOf(info) >= 0) {
-                                        this.openFilesReferenced = copyListRemovingItem(info, this.openFilesReferenced);
-                                    }
-                                    this.openFileRootsConfigured.push(info);
-                                    info.defaultProject = project;
-                                }
-                            }
-                            project.addRoot(info);
-                        }
-                        project.setProjectOptions(projectOptions);
-                        project.finishGraph();
-                    }
-                }
-            };
-            ProjectService.prototype.createProject = function (projectFilename, projectOptions) {
-                var project = new Project(this, projectOptions);
-                project.projectFilename = projectFilename;
-                return project;
-            };
-            return ProjectService;
-        }());
-        server.ProjectService = ProjectService;
-        var CompilerService = (function () {
-            function CompilerService(project, opt) {
-                this.project = project;
-                this.documentRegistry = ts.createDocumentRegistry();
-                this.host = new LSHost(project.projectService.host, project);
-                if (opt) {
-                    this.setCompilerOptions(opt);
-                }
-                else {
-                    var defaultOpts = ts.getDefaultCompilerOptions();
-                    defaultOpts.allowNonTsExtensions = true;
-                    defaultOpts.allowJs = true;
-                    this.setCompilerOptions(defaultOpts);
-                }
-                this.languageService = ts.createLanguageService(this.host, this.documentRegistry);
-                this.classifier = ts.createClassifier();
-            }
-            CompilerService.prototype.setCompilerOptions = function (opt) {
-                this.settings = opt;
-                this.host.setCompilationSettings(opt);
-            };
-            CompilerService.prototype.isExternalModule = function (filename) {
-                var sourceFile = this.languageService.getNonBoundSourceFile(filename);
-                return ts.isExternalModule(sourceFile);
-            };
-            CompilerService.getDefaultFormatCodeOptions = function (host) {
-                return ts.clone({
-                    IndentSize: 4,
-                    TabSize: 4,
-                    NewLineCharacter: host.newLine || "\n",
-                    ConvertTabsToSpaces: true,
-                    IndentStyle: ts.IndentStyle.Smart,
-                    InsertSpaceAfterCommaDelimiter: true,
-                    InsertSpaceAfterSemicolonInForStatements: true,
-                    InsertSpaceBeforeAndAfterBinaryOperators: true,
-                    InsertSpaceAfterKeywordsInControlFlowStatements: true,
-                    InsertSpaceAfterFunctionKeywordForAnonymousFunctions: false,
-                    InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: false,
-                    InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: false,
-                    InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: false,
-                    PlaceOpenBraceOnNewLineForFunctions: false,
-                    PlaceOpenBraceOnNewLineForControlBlocks: false
-                });
-            };
-            return CompilerService;
-        }());
-        server.CompilerService = CompilerService;
-        (function (CharRangeSection) {
-            CharRangeSection[CharRangeSection["PreStart"] = 0] = "PreStart";
-            CharRangeSection[CharRangeSection["Start"] = 1] = "Start";
-            CharRangeSection[CharRangeSection["Entire"] = 2] = "Entire";
-            CharRangeSection[CharRangeSection["Mid"] = 3] = "Mid";
-            CharRangeSection[CharRangeSection["End"] = 4] = "End";
-            CharRangeSection[CharRangeSection["PostEnd"] = 5] = "PostEnd";
-        })(server.CharRangeSection || (server.CharRangeSection = {}));
-        var CharRangeSection = server.CharRangeSection;
-        var BaseLineIndexWalker = (function () {
-            function BaseLineIndexWalker() {
-                this.goSubtree = true;
-                this.done = false;
-            }
-            BaseLineIndexWalker.prototype.leaf = function (rangeStart, rangeLength, ll) {
-            };
-            return BaseLineIndexWalker;
-        }());
-        var EditWalker = (function (_super) {
-            __extends(EditWalker, _super);
-            function EditWalker() {
-                _super.call(this);
-                this.lineIndex = new LineIndex();
-                this.endBranch = [];
-                this.state = CharRangeSection.Entire;
-                this.initialText = "";
-                this.trailingText = "";
-                this.suppressTrailingText = false;
-                this.lineIndex.root = new LineNode();
-                this.startPath = [this.lineIndex.root];
-                this.stack = [this.lineIndex.root];
-            }
-            EditWalker.prototype.insertLines = function (insertedText) {
-                if (this.suppressTrailingText) {
-                    this.trailingText = "";
-                }
-                if (insertedText) {
-                    insertedText = this.initialText + insertedText + this.trailingText;
-                }
-                else {
-                    insertedText = this.initialText + this.trailingText;
-                }
-                var lm = LineIndex.linesFromText(insertedText);
-                var lines = lm.lines;
-                if (lines.length > 1) {
-                    if (lines[lines.length - 1] == "") {
-                        lines.length--;
-                    }
-                }
-                var branchParent;
-                var lastZeroCount;
-                for (var k = this.endBranch.length - 1; k >= 0; k--) {
-                    this.endBranch[k].updateCounts();
-                    if (this.endBranch[k].charCount() === 0) {
-                        lastZeroCount = this.endBranch[k];
-                        if (k > 0) {
-                            branchParent = this.endBranch[k - 1];
-                        }
-                        else {
-                            branchParent = this.branchNode;
-                        }
-                    }
-                }
-                if (lastZeroCount) {
-                    branchParent.remove(lastZeroCount);
-                }
-                var insertionNode = this.startPath[this.startPath.length - 2];
-                var leafNode = this.startPath[this.startPath.length - 1];
-                var len = lines.length;
-                if (len > 0) {
-                    leafNode.text = lines[0];
-                    if (len > 1) {
-                        var insertedNodes = new Array(len - 1);
-                        var startNode = leafNode;
-                        for (var i = 1, len_1 = lines.length; i < len_1; i++) {
-                            insertedNodes[i - 1] = new LineLeaf(lines[i]);
-                        }
-                        var pathIndex = this.startPath.length - 2;
-                        while (pathIndex >= 0) {
-                            insertionNode = this.startPath[pathIndex];
-                            insertedNodes = insertionNode.insertAt(startNode, insertedNodes);
-                            pathIndex--;
-                            startNode = insertionNode;
-                        }
-                        var insertedNodesLen = insertedNodes.length;
-                        while (insertedNodesLen > 0) {
-                            var newRoot = new LineNode();
-                            newRoot.add(this.lineIndex.root);
-                            insertedNodes = newRoot.insertAt(this.lineIndex.root, insertedNodes);
-                            insertedNodesLen = insertedNodes.length;
-                            this.lineIndex.root = newRoot;
-                        }
-                        this.lineIndex.root.updateCounts();
-                    }
-                    else {
-                        for (var j = this.startPath.length - 2; j >= 0; j--) {
-                            this.startPath[j].updateCounts();
-                        }
-                    }
-                }
-                else {
-                    insertionNode.remove(leafNode);
-                    for (var j = this.startPath.length - 2; j >= 0; j--) {
-                        this.startPath[j].updateCounts();
-                    }
-                }
-                return this.lineIndex;
-            };
-            EditWalker.prototype.post = function (relativeStart, relativeLength, lineCollection, parent, nodeType) {
-                if (lineCollection === this.lineCollectionAtBranch) {
-                    this.state = CharRangeSection.End;
-                }
-                this.stack.length--;
-                return undefined;
-            };
-            EditWalker.prototype.pre = function (relativeStart, relativeLength, lineCollection, parent, nodeType) {
-                var currentNode = this.stack[this.stack.length - 1];
-                if ((this.state === CharRangeSection.Entire) && (nodeType === CharRangeSection.Start)) {
-                    this.state = CharRangeSection.Start;
-                    this.branchNode = currentNode;
-                    this.lineCollectionAtBranch = lineCollection;
-                }
-                var child;
-                function fresh(node) {
-                    if (node.isLeaf()) {
-                        return new LineLeaf("");
-                    }
-                    else
-                        return new LineNode();
-                }
-                switch (nodeType) {
-                    case CharRangeSection.PreStart:
-                        this.goSubtree = false;
-                        if (this.state !== CharRangeSection.End) {
-                            currentNode.add(lineCollection);
-                        }
-                        break;
-                    case CharRangeSection.Start:
-                        if (this.state === CharRangeSection.End) {
-                            this.goSubtree = false;
-                        }
-                        else {
-                            child = fresh(lineCollection);
-                            currentNode.add(child);
-                            this.startPath[this.startPath.length] = child;
-                        }
-                        break;
-                    case CharRangeSection.Entire:
-                        if (this.state !== CharRangeSection.End) {
-                            child = fresh(lineCollection);
-                            currentNode.add(child);
-                            this.startPath[this.startPath.length] = child;
-                        }
-                        else {
-                            if (!lineCollection.isLeaf()) {
-                                child = fresh(lineCollection);
-                                currentNode.add(child);
-                                this.endBranch[this.endBranch.length] = child;
-                            }
-                        }
-                        break;
-                    case CharRangeSection.Mid:
-                        this.goSubtree = false;
-                        break;
-                    case CharRangeSection.End:
-                        if (this.state !== CharRangeSection.End) {
-                            this.goSubtree = false;
-                        }
-                        else {
-                            if (!lineCollection.isLeaf()) {
-                                child = fresh(lineCollection);
-                                currentNode.add(child);
-                                this.endBranch[this.endBranch.length] = child;
-                            }
-                        }
-                        break;
-                    case CharRangeSection.PostEnd:
-                        this.goSubtree = false;
-                        if (this.state !== CharRangeSection.Start) {
-                            currentNode.add(lineCollection);
-                        }
-                        break;
-                }
-                if (this.goSubtree) {
-                    this.stack[this.stack.length] = child;
-                }
-                return lineCollection;
-            };
-            EditWalker.prototype.leaf = function (relativeStart, relativeLength, ll) {
-                if (this.state === CharRangeSection.Start) {
-                    this.initialText = ll.text.substring(0, relativeStart);
-                }
-                else if (this.state === CharRangeSection.Entire) {
-                    this.initialText = ll.text.substring(0, relativeStart);
-                    this.trailingText = ll.text.substring(relativeStart + relativeLength);
-                }
-                else {
-                    this.trailingText = ll.text.substring(relativeStart + relativeLength);
-                }
-            };
-            return EditWalker;
-        }(BaseLineIndexWalker));
-        var TextChange = (function () {
-            function TextChange(pos, deleteLen, insertedText) {
-                this.pos = pos;
-                this.deleteLen = deleteLen;
-                this.insertedText = insertedText;
-            }
-            TextChange.prototype.getTextChangeRange = function () {
-                return ts.createTextChangeRange(ts.createTextSpan(this.pos, this.deleteLen), this.insertedText ? this.insertedText.length : 0);
-            };
-            return TextChange;
-        }());
-        server.TextChange = TextChange;
-        var ScriptVersionCache = (function () {
-            function ScriptVersionCache() {
-                this.changes = [];
-                this.versions = [];
-                this.minVersion = 0;
-                this.currentVersion = 0;
-            }
-            ScriptVersionCache.prototype.edit = function (pos, deleteLen, insertedText) {
-                this.changes[this.changes.length] = new TextChange(pos, deleteLen, insertedText);
-                if ((this.changes.length > ScriptVersionCache.changeNumberThreshold) ||
-                    (deleteLen > ScriptVersionCache.changeLengthThreshold) ||
-                    (insertedText && (insertedText.length > ScriptVersionCache.changeLengthThreshold))) {
-                    this.getSnapshot();
-                }
-            };
-            ScriptVersionCache.prototype.latest = function () {
-                return this.versions[this.currentVersion];
-            };
-            ScriptVersionCache.prototype.latestVersion = function () {
-                if (this.changes.length > 0) {
-                    this.getSnapshot();
-                }
-                return this.currentVersion;
-            };
-            ScriptVersionCache.prototype.reloadFromFile = function (filename, cb) {
-                var content = this.host.readFile(filename);
-                if (!content) {
-                    content = "";
-                }
-                this.reload(content);
-                if (cb)
-                    cb();
-            };
-            ScriptVersionCache.prototype.reload = function (script) {
-                this.currentVersion++;
-                this.changes = [];
-                var snap = new LineIndexSnapshot(this.currentVersion, this);
-                this.versions[this.currentVersion] = snap;
-                snap.index = new LineIndex();
-                var lm = LineIndex.linesFromText(script);
-                snap.index.load(lm.lines);
-                for (var i = this.minVersion; i < this.currentVersion; i++) {
-                    this.versions[i] = undefined;
-                }
-                this.minVersion = this.currentVersion;
-            };
-            ScriptVersionCache.prototype.getSnapshot = function () {
-                var snap = this.versions[this.currentVersion];
-                if (this.changes.length > 0) {
-                    var snapIndex = this.latest().index;
-                    for (var i = 0, len = this.changes.length; i < len; i++) {
-                        var change = this.changes[i];
-                        snapIndex = snapIndex.edit(change.pos, change.deleteLen, change.insertedText);
-                    }
-                    snap = new LineIndexSnapshot(this.currentVersion + 1, this);
-                    snap.index = snapIndex;
-                    snap.changesSincePreviousVersion = this.changes;
-                    this.currentVersion = snap.version;
-                    this.versions[snap.version] = snap;
-                    this.changes = [];
-                    if ((this.currentVersion - this.minVersion) >= ScriptVersionCache.maxVersions) {
-                        var oldMin = this.minVersion;
-                        this.minVersion = (this.currentVersion - ScriptVersionCache.maxVersions) + 1;
-                        for (var j = oldMin; j < this.minVersion; j++) {
-                            this.versions[j] = undefined;
-                        }
-                    }
-                }
-                return snap;
-            };
-            ScriptVersionCache.prototype.getTextChangesBetweenVersions = function (oldVersion, newVersion) {
-                if (oldVersion < newVersion) {
-                    if (oldVersion >= this.minVersion) {
-                        var textChangeRanges = [];
-                        for (var i = oldVersion + 1; i <= newVersion; i++) {
-                            var snap = this.versions[i];
-                            for (var j = 0, len = snap.changesSincePreviousVersion.length; j < len; j++) {
-                                var textChange = snap.changesSincePreviousVersion[j];
-                                textChangeRanges[textChangeRanges.length] = textChange.getTextChangeRange();
-                            }
-                        }
-                        return ts.collapseTextChangeRangesAcrossMultipleVersions(textChangeRanges);
-                    }
-                    else {
-                        return undefined;
-                    }
-                }
-                else {
-                    return ts.unchangedTextChangeRange;
-                }
-            };
-            ScriptVersionCache.fromString = function (host, script) {
-                var svc = new ScriptVersionCache();
-                var snap = new LineIndexSnapshot(0, svc);
-                svc.versions[svc.currentVersion] = snap;
-                svc.host = host;
-                snap.index = new LineIndex();
-                var lm = LineIndex.linesFromText(script);
-                snap.index.load(lm.lines);
-                return svc;
-            };
-            ScriptVersionCache.changeNumberThreshold = 8;
-            ScriptVersionCache.changeLengthThreshold = 256;
-            ScriptVersionCache.maxVersions = 8;
-            return ScriptVersionCache;
-        }());
-        server.ScriptVersionCache = ScriptVersionCache;
-        var LineIndexSnapshot = (function () {
-            function LineIndexSnapshot(version, cache) {
-                this.version = version;
-                this.cache = cache;
-                this.changesSincePreviousVersion = [];
-            }
-            LineIndexSnapshot.prototype.getText = function (rangeStart, rangeEnd) {
-                return this.index.getText(rangeStart, rangeEnd - rangeStart);
-            };
-            LineIndexSnapshot.prototype.getLength = function () {
-                return this.index.root.charCount();
-            };
-            LineIndexSnapshot.prototype.getLineStartPositions = function () {
-                var starts = [-1];
-                var count = 1;
-                var pos = 0;
-                this.index.every(function (ll, s, len) {
-                    starts[count] = pos;
-                    count++;
-                    pos += ll.text.length;
-                    return true;
-                }, 0);
-                return starts;
-            };
-            LineIndexSnapshot.prototype.getLineMapper = function () {
-                var _this = this;
-                return function (line) {
-                    return _this.index.lineNumberToInfo(line).offset;
-                };
-            };
-            LineIndexSnapshot.prototype.getTextChangeRangeSinceVersion = function (scriptVersion) {
-                if (this.version <= scriptVersion) {
-                    return ts.unchangedTextChangeRange;
-                }
-                else {
-                    return this.cache.getTextChangesBetweenVersions(scriptVersion, this.version);
-                }
-            };
-            LineIndexSnapshot.prototype.getChangeRange = function (oldSnapshot) {
-                var oldSnap = oldSnapshot;
-                return this.getTextChangeRangeSinceVersion(oldSnap.version);
-            };
-            return LineIndexSnapshot;
-        }());
-        server.LineIndexSnapshot = LineIndexSnapshot;
-        var LineIndex = (function () {
-            function LineIndex() {
-                this.checkEdits = false;
-            }
-            LineIndex.prototype.charOffsetToLineNumberAndPos = function (charOffset) {
-                return this.root.charOffsetToLineNumberAndPos(1, charOffset);
-            };
-            LineIndex.prototype.lineNumberToInfo = function (lineNumber) {
-                var lineCount = this.root.lineCount();
-                if (lineNumber <= lineCount) {
-                    var lineInfo = this.root.lineNumberToInfo(lineNumber, 0);
-                    lineInfo.line = lineNumber;
-                    return lineInfo;
-                }
-                else {
-                    return {
-                        line: lineNumber,
-                        offset: this.root.charCount()
-                    };
-                }
-            };
-            LineIndex.prototype.load = function (lines) {
-                if (lines.length > 0) {
-                    var leaves = [];
-                    for (var i = 0, len = lines.length; i < len; i++) {
-                        leaves[i] = new LineLeaf(lines[i]);
-                    }
-                    this.root = LineIndex.buildTreeFromBottom(leaves);
-                }
-                else {
-                    this.root = new LineNode();
-                }
-            };
-            LineIndex.prototype.walk = function (rangeStart, rangeLength, walkFns) {
-                this.root.walk(rangeStart, rangeLength, walkFns);
-            };
-            LineIndex.prototype.getText = function (rangeStart, rangeLength) {
-                var accum = "";
-                if ((rangeLength > 0) && (rangeStart < this.root.charCount())) {
-                    this.walk(rangeStart, rangeLength, {
-                        goSubtree: true,
-                        done: false,
-                        leaf: function (relativeStart, relativeLength, ll) {
-                            accum = accum.concat(ll.text.substring(relativeStart, relativeStart + relativeLength));
-                        }
-                    });
-                }
-                return accum;
-            };
-            LineIndex.prototype.getLength = function () {
-                return this.root.charCount();
-            };
-            LineIndex.prototype.every = function (f, rangeStart, rangeEnd) {
-                if (!rangeEnd) {
-                    rangeEnd = this.root.charCount();
-                }
-                var walkFns = {
-                    goSubtree: true,
-                    done: false,
-                    leaf: function (relativeStart, relativeLength, ll) {
-                        if (!f(ll, relativeStart, relativeLength)) {
-                            this.done = true;
-                        }
-                    }
-                };
-                this.walk(rangeStart, rangeEnd - rangeStart, walkFns);
-                return !walkFns.done;
-            };
-            LineIndex.prototype.edit = function (pos, deleteLength, newText) {
-                function editFlat(source, s, dl, nt) {
-                    if (nt === void 0) { nt = ""; }
-                    return source.substring(0, s) + nt + source.substring(s + dl, source.length);
-                }
-                if (this.root.charCount() === 0) {
-                    if (newText) {
-                        this.load(LineIndex.linesFromText(newText).lines);
-                        return this;
-                    }
-                }
-                else {
-                    var checkText = void 0;
-                    if (this.checkEdits) {
-                        checkText = editFlat(this.getText(0, this.root.charCount()), pos, deleteLength, newText);
-                    }
-                    var walker = new EditWalker();
-                    if (pos >= this.root.charCount()) {
-                        pos = this.root.charCount() - 1;
-                        var endString = this.getText(pos, 1);
-                        if (newText) {
-                            newText = endString + newText;
-                        }
-                        else {
-                            newText = endString;
-                        }
-                        deleteLength = 0;
-                        walker.suppressTrailingText = true;
-                    }
-                    else if (deleteLength > 0) {
-                        var e = pos + deleteLength;
-                        var lineInfo = this.charOffsetToLineNumberAndPos(e);
-                        if ((lineInfo && (lineInfo.offset === 0))) {
-                            deleteLength += lineInfo.text.length;
-                            if (newText) {
-                                newText = newText + lineInfo.text;
-                            }
-                            else {
-                                newText = lineInfo.text;
-                            }
-                        }
-                    }
-                    if (pos < this.root.charCount()) {
-                        this.root.walk(pos, deleteLength, walker);
-                        walker.insertLines(newText);
-                    }
-                    if (this.checkEdits) {
-                        var updatedText = this.getText(0, this.root.charCount());
-                        ts.Debug.assert(checkText == updatedText, "buffer edit mismatch");
-                    }
-                    return walker.lineIndex;
-                }
-            };
-            LineIndex.buildTreeFromBottom = function (nodes) {
-                var nodeCount = Math.ceil(nodes.length / lineCollectionCapacity);
-                var interiorNodes = [];
-                var nodeIndex = 0;
-                for (var i = 0; i < nodeCount; i++) {
-                    interiorNodes[i] = new LineNode();
-                    var charCount = 0;
-                    var lineCount = 0;
-                    for (var j = 0; j < lineCollectionCapacity; j++) {
-                        if (nodeIndex < nodes.length) {
-                            interiorNodes[i].add(nodes[nodeIndex]);
-                            charCount += nodes[nodeIndex].charCount();
-                            lineCount += nodes[nodeIndex].lineCount();
-                        }
-                        else {
-                            break;
-                        }
-                        nodeIndex++;
-                    }
-                    interiorNodes[i].totalChars = charCount;
-                    interiorNodes[i].totalLines = lineCount;
-                }
-                if (interiorNodes.length === 1) {
-                    return interiorNodes[0];
-                }
-                else {
-                    return this.buildTreeFromBottom(interiorNodes);
-                }
-            };
-            LineIndex.linesFromText = function (text) {
-                var lineStarts = ts.computeLineStarts(text);
-                if (lineStarts.length === 0) {
-                    return { lines: [], lineMap: lineStarts };
-                }
-                var lines = new Array(lineStarts.length);
-                var lc = lineStarts.length - 1;
-                for (var lmi = 0; lmi < lc; lmi++) {
-                    lines[lmi] = text.substring(lineStarts[lmi], lineStarts[lmi + 1]);
-                }
-                var endText = text.substring(lineStarts[lc]);
-                if (endText.length > 0) {
-                    lines[lc] = endText;
-                }
-                else {
-                    lines.length--;
-                }
-                return { lines: lines, lineMap: lineStarts };
-            };
-            return LineIndex;
-        }());
-        server.LineIndex = LineIndex;
-        var LineNode = (function () {
-            function LineNode() {
-                this.totalChars = 0;
-                this.totalLines = 0;
-                this.children = [];
-            }
-            LineNode.prototype.isLeaf = function () {
-                return false;
-            };
-            LineNode.prototype.updateCounts = function () {
-                this.totalChars = 0;
-                this.totalLines = 0;
-                for (var i = 0, len = this.children.length; i < len; i++) {
-                    var child = this.children[i];
-                    this.totalChars += child.charCount();
-                    this.totalLines += child.lineCount();
-                }
-            };
-            LineNode.prototype.execWalk = function (rangeStart, rangeLength, walkFns, childIndex, nodeType) {
-                if (walkFns.pre) {
-                    walkFns.pre(rangeStart, rangeLength, this.children[childIndex], this, nodeType);
-                }
-                if (walkFns.goSubtree) {
-                    this.children[childIndex].walk(rangeStart, rangeLength, walkFns);
-                    if (walkFns.post) {
-                        walkFns.post(rangeStart, rangeLength, this.children[childIndex], this, nodeType);
-                    }
-                }
-                else {
-                    walkFns.goSubtree = true;
-                }
-                return walkFns.done;
-            };
-            LineNode.prototype.skipChild = function (relativeStart, relativeLength, childIndex, walkFns, nodeType) {
-                if (walkFns.pre && (!walkFns.done)) {
-                    walkFns.pre(relativeStart, relativeLength, this.children[childIndex], this, nodeType);
-                    walkFns.goSubtree = true;
-                }
-            };
-            LineNode.prototype.walk = function (rangeStart, rangeLength, walkFns) {
-                var childIndex = 0;
-                var child = this.children[0];
-                var childCharCount = child.charCount();
-                var adjustedStart = rangeStart;
-                while (adjustedStart >= childCharCount) {
-                    this.skipChild(adjustedStart, rangeLength, childIndex, walkFns, CharRangeSection.PreStart);
-                    adjustedStart -= childCharCount;
-                    childIndex++;
-                    child = this.children[childIndex];
-                    childCharCount = child.charCount();
-                }
-                if ((adjustedStart + rangeLength) <= childCharCount) {
-                    if (this.execWalk(adjustedStart, rangeLength, walkFns, childIndex, CharRangeSection.Entire)) {
-                        return;
-                    }
-                }
-                else {
-                    if (this.execWalk(adjustedStart, childCharCount - adjustedStart, walkFns, childIndex, CharRangeSection.Start)) {
-                        return;
-                    }
-                    var adjustedLength = rangeLength - (childCharCount - adjustedStart);
-                    childIndex++;
-                    child = this.children[childIndex];
-                    childCharCount = child.charCount();
-                    while (adjustedLength > childCharCount) {
-                        if (this.execWalk(0, childCharCount, walkFns, childIndex, CharRangeSection.Mid)) {
-                            return;
-                        }
-                        adjustedLength -= childCharCount;
-                        childIndex++;
-                        child = this.children[childIndex];
-                        childCharCount = child.charCount();
-                    }
-                    if (adjustedLength > 0) {
-                        if (this.execWalk(0, adjustedLength, walkFns, childIndex, CharRangeSection.End)) {
-                            return;
-                        }
-                    }
-                }
-                if (walkFns.pre) {
-                    var clen = this.children.length;
-                    if (childIndex < (clen - 1)) {
-                        for (var ej = childIndex + 1; ej < clen; ej++) {
-                            this.skipChild(0, 0, ej, walkFns, CharRangeSection.PostEnd);
-                        }
-                    }
-                }
-            };
-            LineNode.prototype.charOffsetToLineNumberAndPos = function (lineNumber, charOffset) {
-                var childInfo = this.childFromCharOffset(lineNumber, charOffset);
-                if (!childInfo.child) {
-                    return {
-                        line: lineNumber,
-                        offset: charOffset
-                    };
-                }
-                else if (childInfo.childIndex < this.children.length) {
-                    if (childInfo.child.isLeaf()) {
-                        return {
-                            line: childInfo.lineNumber,
-                            offset: childInfo.charOffset,
-                            text: (childInfo.child).text,
-                            leaf: (childInfo.child)
-                        };
-                    }
-                    else {
-                        var lineNode = (childInfo.child);
-                        return lineNode.charOffsetToLineNumberAndPos(childInfo.lineNumber, childInfo.charOffset);
-                    }
-                }
-                else {
-                    var lineInfo = this.lineNumberToInfo(this.lineCount(), 0);
-                    return { line: this.lineCount(), offset: lineInfo.leaf.charCount() };
-                }
-            };
-            LineNode.prototype.lineNumberToInfo = function (lineNumber, charOffset) {
-                var childInfo = this.childFromLineNumber(lineNumber, charOffset);
-                if (!childInfo.child) {
-                    return {
-                        line: lineNumber,
-                        offset: charOffset
-                    };
-                }
-                else if (childInfo.child.isLeaf()) {
-                    return {
-                        line: lineNumber,
-                        offset: childInfo.charOffset,
-                        text: (childInfo.child).text,
-                        leaf: (childInfo.child)
-                    };
-                }
-                else {
-                    var lineNode = (childInfo.child);
-                    return lineNode.lineNumberToInfo(childInfo.relativeLineNumber, childInfo.charOffset);
-                }
-            };
-            LineNode.prototype.childFromLineNumber = function (lineNumber, charOffset) {
-                var child;
-                var relativeLineNumber = lineNumber;
-                var i;
-                var len;
-                for (i = 0, len = this.children.length; i < len; i++) {
-                    child = this.children[i];
-                    var childLineCount = child.lineCount();
-                    if (childLineCount >= relativeLineNumber) {
-                        break;
-                    }
-                    else {
-                        relativeLineNumber -= childLineCount;
-                        charOffset += child.charCount();
-                    }
-                }
-                return {
-                    child: child,
-                    childIndex: i,
-                    relativeLineNumber: relativeLineNumber,
-                    charOffset: charOffset
-                };
-            };
-            LineNode.prototype.childFromCharOffset = function (lineNumber, charOffset) {
-                var child;
-                var i;
-                var len;
-                for (i = 0, len = this.children.length; i < len; i++) {
-                    child = this.children[i];
-                    if (child.charCount() > charOffset) {
-                        break;
-                    }
-                    else {
-                        charOffset -= child.charCount();
-                        lineNumber += child.lineCount();
-                    }
-                }
-                return {
-                    child: child,
-                    childIndex: i,
-                    charOffset: charOffset,
-                    lineNumber: lineNumber
-                };
-            };
-            LineNode.prototype.splitAfter = function (childIndex) {
-                var splitNode;
-                var clen = this.children.length;
-                childIndex++;
-                var endLength = childIndex;
-                if (childIndex < clen) {
-                    splitNode = new LineNode();
-                    while (childIndex < clen) {
-                        splitNode.add(this.children[childIndex]);
-                        childIndex++;
-                    }
-                    splitNode.updateCounts();
-                }
-                this.children.length = endLength;
-                return splitNode;
-            };
-            LineNode.prototype.remove = function (child) {
-                var childIndex = this.findChildIndex(child);
-                var clen = this.children.length;
-                if (childIndex < (clen - 1)) {
-                    for (var i = childIndex; i < (clen - 1); i++) {
-                        this.children[i] = this.children[i + 1];
-                    }
-                }
-                this.children.length--;
-            };
-            LineNode.prototype.findChildIndex = function (child) {
-                var childIndex = 0;
-                var clen = this.children.length;
-                while ((this.children[childIndex] !== child) && (childIndex < clen))
-                    childIndex++;
-                return childIndex;
-            };
-            LineNode.prototype.insertAt = function (child, nodes) {
-                var childIndex = this.findChildIndex(child);
-                var clen = this.children.length;
-                var nodeCount = nodes.length;
-                if ((clen < lineCollectionCapacity) && (childIndex === (clen - 1)) && (nodeCount === 1)) {
-                    this.add(nodes[0]);
-                    this.updateCounts();
-                    return [];
-                }
-                else {
-                    var shiftNode = this.splitAfter(childIndex);
-                    var nodeIndex = 0;
-                    childIndex++;
-                    while ((childIndex < lineCollectionCapacity) && (nodeIndex < nodeCount)) {
-                        this.children[childIndex] = nodes[nodeIndex];
-                        childIndex++;
-                        nodeIndex++;
-                    }
-                    var splitNodes = [];
-                    var splitNodeCount = 0;
-                    if (nodeIndex < nodeCount) {
-                        splitNodeCount = Math.ceil((nodeCount - nodeIndex) / lineCollectionCapacity);
-                        splitNodes = new Array(splitNodeCount);
-                        var splitNodeIndex = 0;
-                        for (var i = 0; i < splitNodeCount; i++) {
-                            splitNodes[i] = new LineNode();
-                        }
-                        var splitNode = splitNodes[0];
-                        while (nodeIndex < nodeCount) {
-                            splitNode.add(nodes[nodeIndex]);
-                            nodeIndex++;
-                            if (splitNode.children.length === lineCollectionCapacity) {
-                                splitNodeIndex++;
-                                splitNode = splitNodes[splitNodeIndex];
-                            }
-                        }
-                        for (var i = splitNodes.length - 1; i >= 0; i--) {
-                            if (splitNodes[i].children.length === 0) {
-                                splitNodes.length--;
-                            }
-                        }
-                    }
-                    if (shiftNode) {
-                        splitNodes[splitNodes.length] = shiftNode;
-                    }
-                    this.updateCounts();
-                    for (var i = 0; i < splitNodeCount; i++) {
-                        splitNodes[i].updateCounts();
-                    }
-                    return splitNodes;
-                }
-            };
-            LineNode.prototype.add = function (collection) {
-                this.children[this.children.length] = collection;
-                return (this.children.length < lineCollectionCapacity);
-            };
-            LineNode.prototype.charCount = function () {
-                return this.totalChars;
-            };
-            LineNode.prototype.lineCount = function () {
-                return this.totalLines;
-            };
-            return LineNode;
-        }());
-        server.LineNode = LineNode;
-        var LineLeaf = (function () {
-            function LineLeaf(text) {
-                this.text = text;
-            }
-            LineLeaf.prototype.setUdata = function (data) {
-                this.udata = data;
-            };
-            LineLeaf.prototype.getUdata = function () {
-                return this.udata;
-            };
-            LineLeaf.prototype.isLeaf = function () {
-                return true;
-            };
-            LineLeaf.prototype.walk = function (rangeStart, rangeLength, walkFns) {
-                walkFns.leaf(rangeStart, rangeLength, this);
-            };
-            LineLeaf.prototype.charCount = function () {
-                return this.text.length;
-            };
-            LineLeaf.prototype.lineCount = function () {
-                return 1;
-            };
-            return LineLeaf;
-        }());
-        server.LineLeaf = LineLeaf;
-    })(server = ts.server || (ts.server = {}));
-})(ts || (ts = {}));
-var debugObjectHost = this;
-var ts;
-(function (ts) {
-    function logInternalError(logger, err) {
-        if (logger) {
-            logger.log("*INTERNAL ERROR* - Exception in typescript services: " + err.message);
-        }
-    }
-    var ScriptSnapshotShimAdapter = (function () {
-        function ScriptSnapshotShimAdapter(scriptSnapshotShim) {
-            this.scriptSnapshotShim = scriptSnapshotShim;
-        }
-        ScriptSnapshotShimAdapter.prototype.getText = function (start, end) {
-            return this.scriptSnapshotShim.getText(start, end);
-        };
-        ScriptSnapshotShimAdapter.prototype.getLength = function () {
-            return this.scriptSnapshotShim.getLength();
-        };
-        ScriptSnapshotShimAdapter.prototype.getChangeRange = function (oldSnapshot) {
-            var oldSnapshotShim = oldSnapshot;
-            var encoded = this.scriptSnapshotShim.getChangeRange(oldSnapshotShim.scriptSnapshotShim);
-            if (encoded == null) {
-                return null;
-            }
-            var decoded = JSON.parse(encoded);
-            return ts.createTextChangeRange(ts.createTextSpan(decoded.span.start, decoded.span.length), decoded.newLength);
-        };
-        ScriptSnapshotShimAdapter.prototype.dispose = function () {
-            if ("dispose" in this.scriptSnapshotShim) {
-                this.scriptSnapshotShim.dispose();
-            }
-        };
-        return ScriptSnapshotShimAdapter;
-    }());
-    var LanguageServiceShimHostAdapter = (function () {
-        function LanguageServiceShimHostAdapter(shimHost) {
-            var _this = this;
-            this.shimHost = shimHost;
-            this.loggingEnabled = false;
-            this.tracingEnabled = false;
-            if ("getModuleResolutionsForFile" in this.shimHost) {
-                this.resolveModuleNames = function (moduleNames, containingFile) {
-                    var resolutionsInFile = JSON.parse(_this.shimHost.getModuleResolutionsForFile(containingFile));
-                    return ts.map(moduleNames, function (name) {
-                        var result = ts.lookUp(resolutionsInFile, name);
-                        return result ? { resolvedFileName: result } : undefined;
-                    });
-                };
-            }
-            if ("directoryExists" in this.shimHost) {
-                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
-            }
-            if ("getTypeReferenceDirectiveResolutionsForFile" in this.shimHost) {
-                this.resolveTypeReferenceDirectives = function (typeDirectiveNames, containingFile) {
-                    var typeDirectivesForFile = JSON.parse(_this.shimHost.getTypeReferenceDirectiveResolutionsForFile(containingFile));
-                    return ts.map(typeDirectiveNames, function (name) { return ts.lookUp(typeDirectivesForFile, name); });
-                };
-            }
-        }
-        LanguageServiceShimHostAdapter.prototype.log = function (s) {
-            if (this.loggingEnabled) {
-                this.shimHost.log(s);
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.trace = function (s) {
-            if (this.tracingEnabled) {
-                this.shimHost.trace(s);
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.error = function (s) {
-            this.shimHost.error(s);
-        };
-        LanguageServiceShimHostAdapter.prototype.getProjectVersion = function () {
-            if (!this.shimHost.getProjectVersion) {
-                return undefined;
-            }
-            return this.shimHost.getProjectVersion();
-        };
-        LanguageServiceShimHostAdapter.prototype.useCaseSensitiveFileNames = function () {
-            return this.shimHost.useCaseSensitiveFileNames ? this.shimHost.useCaseSensitiveFileNames() : false;
-        };
-        LanguageServiceShimHostAdapter.prototype.getCompilationSettings = function () {
-            var settingsJson = this.shimHost.getCompilationSettings();
-            if (settingsJson == null || settingsJson == "") {
-                throw Error("LanguageServiceShimHostAdapter.getCompilationSettings: empty compilationSettings");
-            }
-            return JSON.parse(settingsJson);
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptFileNames = function () {
-            var encoded = this.shimHost.getScriptFileNames();
-            return this.files = JSON.parse(encoded);
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptSnapshot = function (fileName) {
-            var scriptSnapshot = this.shimHost.getScriptSnapshot(fileName);
-            return scriptSnapshot && new ScriptSnapshotShimAdapter(scriptSnapshot);
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptKind = function (fileName) {
-            if ("getScriptKind" in this.shimHost) {
-                return this.shimHost.getScriptKind(fileName);
-            }
-            else {
-                return 0;
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptVersion = function (fileName) {
-            return this.shimHost.getScriptVersion(fileName);
-        };
-        LanguageServiceShimHostAdapter.prototype.getLocalizedDiagnosticMessages = function () {
-            var diagnosticMessagesJson = this.shimHost.getLocalizedDiagnosticMessages();
-            if (diagnosticMessagesJson == null || diagnosticMessagesJson == "") {
-                return null;
-            }
-            try {
-                return JSON.parse(diagnosticMessagesJson);
-            }
-            catch (e) {
-                this.log(e.description || "diagnosticMessages.generated.json has invalid JSON format");
-                return null;
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.getCancellationToken = function () {
-            var hostCancellationToken = this.shimHost.getCancellationToken();
-            return new ThrottledCancellationToken(hostCancellationToken);
-        };
-        LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
-            return this.shimHost.getCurrentDirectory();
-        };
-        LanguageServiceShimHostAdapter.prototype.getDirectories = function (path) {
-            return this.shimHost.getDirectories(path);
-        };
-        LanguageServiceShimHostAdapter.prototype.getDefaultLibFileName = function (options) {
-            return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
-        };
-        return LanguageServiceShimHostAdapter;
-    }());
-    ts.LanguageServiceShimHostAdapter = LanguageServiceShimHostAdapter;
-    var ThrottledCancellationToken = (function () {
-        function ThrottledCancellationToken(hostCancellationToken) {
-            this.hostCancellationToken = hostCancellationToken;
-            this.lastCancellationCheckTime = 0;
-        }
-        ThrottledCancellationToken.prototype.isCancellationRequested = function () {
-            var time = Date.now();
-            var duration = Math.abs(time - this.lastCancellationCheckTime);
-            if (duration > 10) {
-                this.lastCancellationCheckTime = time;
-                return this.hostCancellationToken.isCancellationRequested();
-            }
-            return false;
-        };
-        return ThrottledCancellationToken;
-    }());
-    var CoreServicesShimHostAdapter = (function () {
-        function CoreServicesShimHostAdapter(shimHost) {
-            var _this = this;
-            this.shimHost = shimHost;
-            if ("directoryExists" in this.shimHost) {
-                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
-            }
-            if ("realpath" in this.shimHost) {
-                this.realpath = function (path) { return _this.shimHost.realpath(path); };
-            }
-        }
-        CoreServicesShimHostAdapter.prototype.readDirectory = function (rootDir, extension, exclude, depth) {
-            var encoded;
-            try {
-                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude), depth);
-            }
-            catch (e) {
-                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude));
-            }
-            return JSON.parse(encoded);
-        };
-        CoreServicesShimHostAdapter.prototype.fileExists = function (fileName) {
-            return this.shimHost.fileExists(fileName);
-        };
-        CoreServicesShimHostAdapter.prototype.readFile = function (fileName) {
-            return this.shimHost.readFile(fileName);
-        };
-        return CoreServicesShimHostAdapter;
-    }());
-    ts.CoreServicesShimHostAdapter = CoreServicesShimHostAdapter;
-    function simpleForwardCall(logger, actionDescription, action, logPerformance) {
-        var start;
-        if (logPerformance) {
-            logger.log(actionDescription);
-            start = Date.now();
-        }
-        var result = action();
-        if (logPerformance) {
-            var end = Date.now();
-            logger.log(actionDescription + " completed in " + (end - start) + " msec");
-            if (typeof result === "string") {
-                var str = result;
-                if (str.length > 128) {
-                    str = str.substring(0, 128) + "...";
-                }
-                logger.log("  result.length=" + str.length + ", result='" + JSON.stringify(str) + "'");
-            }
-        }
-        return result;
-    }
-    function forwardJSONCall(logger, actionDescription, action, logPerformance) {
-        try {
-            var result = simpleForwardCall(logger, actionDescription, action, logPerformance);
-            return JSON.stringify({ result: result });
-        }
-        catch (err) {
-            if (err instanceof ts.OperationCanceledException) {
-                return JSON.stringify({ canceled: true });
-            }
-            logInternalError(logger, err);
-            err.description = actionDescription;
-            return JSON.stringify({ error: err });
-        }
-    }
-    var ShimBase = (function () {
-        function ShimBase(factory) {
-            this.factory = factory;
-            factory.registerShim(this);
-        }
-        ShimBase.prototype.dispose = function (dummy) {
-            this.factory.unregisterShim(this);
-        };
-        return ShimBase;
-    }());
-    function realizeDiagnostics(diagnostics, newLine) {
-        return diagnostics.map(function (d) { return realizeDiagnostic(d, newLine); });
-    }
-    ts.realizeDiagnostics = realizeDiagnostics;
-    function realizeDiagnostic(diagnostic, newLine) {
-        return {
-            message: ts.flattenDiagnosticMessageText(diagnostic.messageText, newLine),
-            start: diagnostic.start,
-            length: diagnostic.length,
-            category: ts.DiagnosticCategory[diagnostic.category].toLowerCase(),
-            code: diagnostic.code
-        };
-    }
-    var LanguageServiceShimObject = (function (_super) {
-        __extends(LanguageServiceShimObject, _super);
-        function LanguageServiceShimObject(factory, host, languageService) {
-            _super.call(this, factory);
-            this.host = host;
-            this.languageService = languageService;
-            this.logPerformance = false;
-            this.logger = this.host;
-        }
-        LanguageServiceShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
-            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
-        };
-        LanguageServiceShimObject.prototype.dispose = function (dummy) {
-            this.logger.log("dispose()");
-            this.languageService.dispose();
-            this.languageService = null;
-            if (debugObjectHost && debugObjectHost.CollectGarbage) {
-                debugObjectHost.CollectGarbage();
-                this.logger.log("CollectGarbage()");
-            }
-            this.logger = null;
-            _super.prototype.dispose.call(this, dummy);
-        };
-        LanguageServiceShimObject.prototype.refresh = function (throwOnError) {
-            this.forwardJSONCall("refresh(" + throwOnError + ")", function () { return null; });
-        };
-        LanguageServiceShimObject.prototype.cleanupSemanticCache = function () {
-            var _this = this;
-            this.forwardJSONCall("cleanupSemanticCache()", function () {
-                _this.languageService.cleanupSemanticCache();
-                return null;
-            });
-        };
-        LanguageServiceShimObject.prototype.realizeDiagnostics = function (diagnostics) {
-            var newLine = ts.getNewLineOrDefaultFromHost(this.host);
-            return ts.realizeDiagnostics(diagnostics, newLine);
-        };
-        LanguageServiceShimObject.prototype.getSyntacticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSyntacticClassifications(fileName, ts.createTextSpan(start, length)); });
-        };
-        LanguageServiceShimObject.prototype.getSemanticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSemanticClassifications(fileName, ts.createTextSpan(start, length)); });
-        };
-        LanguageServiceShimObject.prototype.getEncodedSyntacticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getEncodedSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return convertClassifications(_this.languageService.getEncodedSyntacticClassifications(fileName, ts.createTextSpan(start, length))); });
-        };
-        LanguageServiceShimObject.prototype.getEncodedSemanticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getEncodedSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return convertClassifications(_this.languageService.getEncodedSemanticClassifications(fileName, ts.createTextSpan(start, length))); });
-        };
-        LanguageServiceShimObject.prototype.getSyntacticDiagnostics = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getSyntacticDiagnostics('" + fileName + "')", function () {
-                var diagnostics = _this.languageService.getSyntacticDiagnostics(fileName);
-                return _this.realizeDiagnostics(diagnostics);
-            });
-        };
-        LanguageServiceShimObject.prototype.getSemanticDiagnostics = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getSemanticDiagnostics('" + fileName + "')", function () {
-                var diagnostics = _this.languageService.getSemanticDiagnostics(fileName);
-                return _this.realizeDiagnostics(diagnostics);
-            });
-        };
-        LanguageServiceShimObject.prototype.getCompilerOptionsDiagnostics = function () {
-            var _this = this;
-            return this.forwardJSONCall("getCompilerOptionsDiagnostics()", function () {
-                var diagnostics = _this.languageService.getCompilerOptionsDiagnostics();
-                return _this.realizeDiagnostics(diagnostics);
-            });
-        };
-        LanguageServiceShimObject.prototype.getQuickInfoAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getQuickInfoAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getQuickInfoAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getNameOrDottedNameSpan = function (fileName, startPos, endPos) {
-            var _this = this;
-            return this.forwardJSONCall("getNameOrDottedNameSpan('" + fileName + "', " + startPos + ", " + endPos + ")", function () { return _this.languageService.getNameOrDottedNameSpan(fileName, startPos, endPos); });
-        };
-        LanguageServiceShimObject.prototype.getBreakpointStatementAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getBreakpointStatementAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBreakpointStatementAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getSignatureHelpItems = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getSignatureHelpItems('" + fileName + "', " + position + ")", function () { return _this.languageService.getSignatureHelpItems(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getDefinitionAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDefinitionAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getTypeDefinitionAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getTypeDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getTypeDefinitionAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getRenameInfo = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getRenameInfo('" + fileName + "', " + position + ")", function () { return _this.languageService.getRenameInfo(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.findRenameLocations = function (fileName, position, findInStrings, findInComments) {
-            var _this = this;
-            return this.forwardJSONCall("findRenameLocations('" + fileName + "', " + position + ", " + findInStrings + ", " + findInComments + ")", function () { return _this.languageService.findRenameLocations(fileName, position, findInStrings, findInComments); });
-        };
-        LanguageServiceShimObject.prototype.getBraceMatchingAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getBraceMatchingAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBraceMatchingAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.isValidBraceCompletionAtPostion = function (fileName, position, openingBrace) {
-            var _this = this;
-            return this.forwardJSONCall("isValidBraceCompletionAtPostion('" + fileName + "', " + position + ", " + openingBrace + ")", function () { return _this.languageService.isValidBraceCompletionAtPostion(fileName, position, openingBrace); });
-        };
-        LanguageServiceShimObject.prototype.getIndentationAtPosition = function (fileName, position, options) {
-            var _this = this;
-            return this.forwardJSONCall("getIndentationAtPosition('" + fileName + "', " + position + ")", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getIndentationAtPosition(fileName, position, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getReferencesAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getReferencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getReferencesAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.findReferences = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("findReferences('" + fileName + "', " + position + ")", function () { return _this.languageService.findReferences(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getOccurrencesAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getOccurrencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getOccurrencesAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getDocumentHighlights = function (fileName, position, filesToSearch) {
-            var _this = this;
-            return this.forwardJSONCall("getDocumentHighlights('" + fileName + "', " + position + ")", function () {
-                var results = _this.languageService.getDocumentHighlights(fileName, position, JSON.parse(filesToSearch));
-                var normalizedName = ts.normalizeSlashes(fileName).toLowerCase();
-                return ts.filter(results, function (r) { return ts.normalizeSlashes(r.fileName).toLowerCase() === normalizedName; });
-            });
-        };
-        LanguageServiceShimObject.prototype.getCompletionsAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getCompletionsAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getCompletionsAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getCompletionEntryDetails = function (fileName, position, entryName) {
-            var _this = this;
-            return this.forwardJSONCall("getCompletionEntryDetails('" + fileName + "', " + position + ", '" + entryName + "')", function () { return _this.languageService.getCompletionEntryDetails(fileName, position, entryName); });
-        };
-        LanguageServiceShimObject.prototype.getFormattingEditsForRange = function (fileName, start, end, options) {
-            var _this = this;
-            return this.forwardJSONCall("getFormattingEditsForRange('" + fileName + "', " + start + ", " + end + ")", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getFormattingEditsForRange(fileName, start, end, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getFormattingEditsForDocument = function (fileName, options) {
-            var _this = this;
-            return this.forwardJSONCall("getFormattingEditsForDocument('" + fileName + "')", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getFormattingEditsForDocument(fileName, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getFormattingEditsAfterKeystroke = function (fileName, position, key, options) {
-            var _this = this;
-            return this.forwardJSONCall("getFormattingEditsAfterKeystroke('" + fileName + "', " + position + ", '" + key + "')", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getFormattingEditsAfterKeystroke(fileName, position, key, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getDocCommentTemplateAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getDocCommentTemplateAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDocCommentTemplateAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getNavigateToItems = function (searchValue, maxResultCount) {
-            var _this = this;
-            return this.forwardJSONCall("getNavigateToItems('" + searchValue + "', " + maxResultCount + ")", function () { return _this.languageService.getNavigateToItems(searchValue, maxResultCount); });
-        };
-        LanguageServiceShimObject.prototype.getNavigationBarItems = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getNavigationBarItems('" + fileName + "')", function () { return _this.languageService.getNavigationBarItems(fileName); });
-        };
-        LanguageServiceShimObject.prototype.getOutliningSpans = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getOutliningSpans('" + fileName + "')", function () { return _this.languageService.getOutliningSpans(fileName); });
-        };
-        LanguageServiceShimObject.prototype.getTodoComments = function (fileName, descriptors) {
-            var _this = this;
-            return this.forwardJSONCall("getTodoComments('" + fileName + "')", function () { return _this.languageService.getTodoComments(fileName, JSON.parse(descriptors)); });
-        };
-        LanguageServiceShimObject.prototype.getEmitOutput = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getEmitOutput('" + fileName + "')", function () { return _this.languageService.getEmitOutput(fileName); });
-        };
-        return LanguageServiceShimObject;
-    }(ShimBase));
-    function convertClassifications(classifications) {
-        return { spans: classifications.spans.join(","), endOfLineState: classifications.endOfLineState };
-    }
-    var ClassifierShimObject = (function (_super) {
-        __extends(ClassifierShimObject, _super);
-        function ClassifierShimObject(factory, logger) {
-            _super.call(this, factory);
-            this.logger = logger;
-            this.logPerformance = false;
-            this.classifier = ts.createClassifier();
-        }
-        ClassifierShimObject.prototype.getEncodedLexicalClassifications = function (text, lexState, syntacticClassifierAbsent) {
-            var _this = this;
-            return forwardJSONCall(this.logger, "getEncodedLexicalClassifications", function () { return convertClassifications(_this.classifier.getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent)); }, this.logPerformance);
-        };
-        ClassifierShimObject.prototype.getClassificationsForLine = function (text, lexState, classifyKeywordsInGenerics) {
-            var classification = this.classifier.getClassificationsForLine(text, lexState, classifyKeywordsInGenerics);
-            var result = "";
-            for (var _i = 0, _a = classification.entries; _i < _a.length; _i++) {
-                var item = _a[_i];
-                result += item.length + "\n";
-                result += item.classification + "\n";
-            }
-            result += classification.finalLexState;
-            return result;
-        };
-        return ClassifierShimObject;
-    }(ShimBase));
-    var CoreServicesShimObject = (function (_super) {
-        __extends(CoreServicesShimObject, _super);
-        function CoreServicesShimObject(factory, logger, host) {
-            _super.call(this, factory);
-            this.logger = logger;
-            this.host = host;
-            this.logPerformance = false;
-        }
-        CoreServicesShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
-            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
-        };
-        CoreServicesShimObject.prototype.resolveModuleName = function (fileName, moduleName, compilerOptionsJson) {
-            var _this = this;
-            return this.forwardJSONCall("resolveModuleName('" + fileName + "')", function () {
-                var compilerOptions = JSON.parse(compilerOptionsJson);
-                var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
-                return {
-                    resolvedFileName: result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined,
-                    failedLookupLocations: result.failedLookupLocations
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.resolveTypeReferenceDirective = function (fileName, typeReferenceDirective, compilerOptionsJson) {
-            var _this = this;
-            return this.forwardJSONCall("resolveTypeReferenceDirective(" + fileName + ")", function () {
-                var compilerOptions = JSON.parse(compilerOptionsJson);
-                var result = ts.resolveTypeReferenceDirective(typeReferenceDirective, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
-                return {
-                    resolvedFileName: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.resolvedFileName : undefined,
-                    primary: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.primary : true,
-                    failedLookupLocations: result.failedLookupLocations
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.getPreProcessedFileInfo = function (fileName, sourceTextSnapshot) {
-            var _this = this;
-            return this.forwardJSONCall("getPreProcessedFileInfo('" + fileName + "')", function () {
-                var result = ts.preProcessFile(sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength()), true, true);
-                return {
-                    referencedFiles: _this.convertFileReferences(result.referencedFiles),
-                    importedFiles: _this.convertFileReferences(result.importedFiles),
-                    ambientExternalModules: result.ambientExternalModules,
-                    isLibFile: result.isLibFile,
-                    typeReferenceDirectives: _this.convertFileReferences(result.typeReferenceDirectives)
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.convertFileReferences = function (refs) {
-            if (!refs) {
-                return undefined;
-            }
-            var result = [];
-            for (var _i = 0, refs_2 = refs; _i < refs_2.length; _i++) {
-                var ref = refs_2[_i];
-                result.push({
-                    path: ts.normalizeSlashes(ref.fileName),
-                    position: ref.pos,
-                    length: ref.end - ref.pos
-                });
-            }
-            return result;
-        };
-        CoreServicesShimObject.prototype.getTSConfigFileInfo = function (fileName, sourceTextSnapshot) {
-            var _this = this;
-            return this.forwardJSONCall("getTSConfigFileInfo('" + fileName + "')", function () {
-                var text = sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength());
-                var result = ts.parseConfigFileTextToJson(fileName, text);
-                if (result.error) {
-                    return {
-                        options: {},
-                        typingOptions: {},
-                        files: [],
-                        raw: {},
-                        errors: [realizeDiagnostic(result.error, "\r\n")]
-                    };
-                }
-                var normalizedFileName = ts.normalizeSlashes(fileName);
-                var configFile = ts.parseJsonConfigFileContent(result.config, _this.host, ts.getDirectoryPath(normalizedFileName), {}, normalizedFileName);
-                return {
-                    options: configFile.options,
-                    typingOptions: configFile.typingOptions,
-                    files: configFile.fileNames,
-                    raw: configFile.raw,
-                    errors: realizeDiagnostics(configFile.errors, "\r\n")
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.getDefaultCompilationSettings = function () {
-            return this.forwardJSONCall("getDefaultCompilationSettings()", function () { return ts.getDefaultCompilerOptions(); });
-        };
-        CoreServicesShimObject.prototype.discoverTypings = function (discoverTypingsJson) {
-            var _this = this;
-            var getCanonicalFileName = ts.createGetCanonicalFileName(false);
-            return this.forwardJSONCall("discoverTypings()", function () {
-                var info = JSON.parse(discoverTypingsJson);
-                return ts.JsTyping.discoverTypings(_this.host, info.fileNames, ts.toPath(info.projectRootPath, info.projectRootPath, getCanonicalFileName), ts.toPath(info.safeListPath, info.safeListPath, getCanonicalFileName), info.packageNameToTypingLocation, info.typingOptions, info.compilerOptions);
-            });
-        };
-        return CoreServicesShimObject;
-    }(ShimBase));
-    var TypeScriptServicesFactory = (function () {
-        function TypeScriptServicesFactory() {
-            this._shims = [];
-        }
-        TypeScriptServicesFactory.prototype.getServicesVersion = function () {
-            return ts.servicesVersion;
-        };
-        TypeScriptServicesFactory.prototype.createLanguageServiceShim = function (host) {
-            try {
-                if (this.documentRegistry === undefined) {
-                    this.documentRegistry = ts.createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory());
-                }
-                var hostAdapter = new LanguageServiceShimHostAdapter(host);
-                var languageService = ts.createLanguageService(hostAdapter, this.documentRegistry);
-                return new LanguageServiceShimObject(this, host, languageService);
-            }
-            catch (err) {
-                logInternalError(host, err);
-                throw err;
-            }
-        };
-        TypeScriptServicesFactory.prototype.createClassifierShim = function (logger) {
-            try {
-                return new ClassifierShimObject(this, logger);
-            }
-            catch (err) {
-                logInternalError(logger, err);
-                throw err;
-            }
-        };
-        TypeScriptServicesFactory.prototype.createCoreServicesShim = function (host) {
-            try {
-                var adapter = new CoreServicesShimHostAdapter(host);
-                return new CoreServicesShimObject(this, host, adapter);
-            }
-            catch (err) {
-                logInternalError(host, err);
-                throw err;
-            }
-        };
-        TypeScriptServicesFactory.prototype.close = function () {
-            this._shims = [];
-            this.documentRegistry = undefined;
-        };
-        TypeScriptServicesFactory.prototype.registerShim = function (shim) {
-            this._shims.push(shim);
-        };
-        TypeScriptServicesFactory.prototype.unregisterShim = function (shim) {
-            for (var i = 0, n = this._shims.length; i < n; i++) {
-                if (this._shims[i] === shim) {
-                    delete this._shims[i];
-                    return;
-                }
-            }
-            throw new Error("Invalid operation");
-        };
-        return TypeScriptServicesFactory;
-    }());
-    ts.TypeScriptServicesFactory = TypeScriptServicesFactory;
-    if (typeof module !== "undefined" && module.exports) {
-        module.exports = ts;
-    }
-})(ts || (ts = {}));
-var TypeScript;
-(function (TypeScript) {
-    var Services;
-    (function (Services) {
-        Services.TypeScriptServicesFactory = ts.TypeScriptServicesFactory;
-    })(Services = TypeScript.Services || (TypeScript.Services = {}));
-})(TypeScript || (TypeScript = {}));
-var toolsVersion = "1.9";
+var __extends = (this && this.__extends) || function (d, b) {
+    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+};
+var ts;
+(function (ts) {
+    var OperationCanceledException = (function () {
+        function OperationCanceledException() {
+        }
+        return OperationCanceledException;
+    }());
+    ts.OperationCanceledException = OperationCanceledException;
+    (function (ExitStatus) {
+        ExitStatus[ExitStatus["Success"] = 0] = "Success";
+        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
+        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
+    })(ts.ExitStatus || (ts.ExitStatus = {}));
+    var ExitStatus = ts.ExitStatus;
+    (function (TypeReferenceSerializationKind) {
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithConstructSignatureAndValue"] = 1] = "TypeWithConstructSignatureAndValue";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["VoidType"] = 2] = "VoidType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["NumberLikeType"] = 3] = "NumberLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["StringLikeType"] = 4] = "StringLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["BooleanType"] = 5] = "BooleanType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ArrayLikeType"] = 6] = "ArrayLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ESSymbolType"] = 7] = "ESSymbolType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 8] = "TypeWithCallSignature";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 9] = "ObjectType";
+    })(ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
+    var TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind;
+    (function (DiagnosticCategory) {
+        DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
+        DiagnosticCategory[DiagnosticCategory["Error"] = 1] = "Error";
+        DiagnosticCategory[DiagnosticCategory["Message"] = 2] = "Message";
+    })(ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
+    var DiagnosticCategory = ts.DiagnosticCategory;
+    (function (ModuleResolutionKind) {
+        ModuleResolutionKind[ModuleResolutionKind["Classic"] = 1] = "Classic";
+        ModuleResolutionKind[ModuleResolutionKind["NodeJs"] = 2] = "NodeJs";
+    })(ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
+    var ModuleResolutionKind = ts.ModuleResolutionKind;
+    (function (ModuleKind) {
+        ModuleKind[ModuleKind["None"] = 0] = "None";
+        ModuleKind[ModuleKind["CommonJS"] = 1] = "CommonJS";
+        ModuleKind[ModuleKind["AMD"] = 2] = "AMD";
+        ModuleKind[ModuleKind["UMD"] = 3] = "UMD";
+        ModuleKind[ModuleKind["System"] = 4] = "System";
+        ModuleKind[ModuleKind["ES6"] = 5] = "ES6";
+        ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
+    })(ts.ModuleKind || (ts.ModuleKind = {}));
+    var ModuleKind = ts.ModuleKind;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function createFileMap(keyMapper) {
+        var files = {};
+        return {
+            get: get,
+            set: set,
+            contains: contains,
+            remove: remove,
+            forEachValue: forEachValueInMap,
+            clear: clear
+        };
+        function forEachValueInMap(f) {
+            for (var key in files) {
+                f(key, files[key]);
+            }
+        }
+        function get(path) {
+            return files[toKey(path)];
+        }
+        function set(path, value) {
+            files[toKey(path)] = value;
+        }
+        function contains(path) {
+            return hasProperty(files, toKey(path));
+        }
+        function remove(path) {
+            var key = toKey(path);
+            delete files[key];
+        }
+        function clear() {
+            files = {};
+        }
+        function toKey(path) {
+            return keyMapper ? keyMapper(path) : path;
+        }
+    }
+    ts.createFileMap = createFileMap;
+    function toPath(fileName, basePath, getCanonicalFileName) {
+        var nonCanonicalizedPath = isRootedDiskPath(fileName)
+            ? normalizePath(fileName)
+            : getNormalizedAbsolutePath(fileName, basePath);
+        return getCanonicalFileName(nonCanonicalizedPath);
+    }
+    ts.toPath = toPath;
+    function forEach(array, callback) {
+        if (array) {
+            for (var i = 0, len = array.length; i < len; i++) {
+                var result = callback(array[i], i);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.forEach = forEach;
+    function contains(array, value, areEqual) {
+        if (array) {
+            for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
+                var v = array_1[_i];
+                if (areEqual ? areEqual(v, value) : v === value) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+    ts.contains = contains;
+    function indexOf(array, value) {
+        if (array) {
+            for (var i = 0, len = array.length; i < len; i++) {
+                if (array[i] === value) {
+                    return i;
+                }
+            }
+        }
+        return -1;
+    }
+    ts.indexOf = indexOf;
+    function countWhere(array, predicate) {
+        var count = 0;
+        if (array) {
+            for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
+                var v = array_2[_i];
+                if (predicate(v)) {
+                    count++;
+                }
+            }
+        }
+        return count;
+    }
+    ts.countWhere = countWhere;
+    function filter(array, f) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_3 = array; _i < array_3.length; _i++) {
+                var item = array_3[_i];
+                if (f(item)) {
+                    result.push(item);
+                }
+            }
+        }
+        return result;
+    }
+    ts.filter = filter;
+    function map(array, f) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_4 = array; _i < array_4.length; _i++) {
+                var v = array_4[_i];
+                result.push(f(v));
+            }
+        }
+        return result;
+    }
+    ts.map = map;
+    function concatenate(array1, array2) {
+        if (!array2 || !array2.length)
+            return array1;
+        if (!array1 || !array1.length)
+            return array2;
+        return array1.concat(array2);
+    }
+    ts.concatenate = concatenate;
+    function deduplicate(array, areEqual) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
+                var item = array_5[_i];
+                if (!contains(result, item, areEqual)) {
+                    result.push(item);
+                }
+            }
+        }
+        return result;
+    }
+    ts.deduplicate = deduplicate;
+    function sum(array, prop) {
+        var result = 0;
+        for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
+            var v = array_6[_i];
+            result += v[prop];
+        }
+        return result;
+    }
+    ts.sum = sum;
+    function addRange(to, from) {
+        if (to && from) {
+            for (var _i = 0, from_1 = from; _i < from_1.length; _i++) {
+                var v = from_1[_i];
+                to.push(v);
+            }
+        }
+    }
+    ts.addRange = addRange;
+    function rangeEquals(array1, array2, pos, end) {
+        while (pos < end) {
+            if (array1[pos] !== array2[pos]) {
+                return false;
+            }
+            pos++;
+        }
+        return true;
+    }
+    ts.rangeEquals = rangeEquals;
+    function lastOrUndefined(array) {
+        if (array.length === 0) {
+            return undefined;
+        }
+        return array[array.length - 1];
+    }
+    ts.lastOrUndefined = lastOrUndefined;
+    function binarySearch(array, value) {
+        var low = 0;
+        var high = array.length - 1;
+        while (low <= high) {
+            var middle = low + ((high - low) >> 1);
+            var midValue = array[middle];
+            if (midValue === value) {
+                return middle;
+            }
+            else if (midValue > value) {
+                high = middle - 1;
+            }
+            else {
+                low = middle + 1;
+            }
+        }
+        return ~low;
+    }
+    ts.binarySearch = binarySearch;
+    function reduceLeft(array, f, initial) {
+        if (array) {
+            var count = array.length;
+            if (count > 0) {
+                var pos = 0;
+                var result = void 0;
+                if (arguments.length <= 2) {
+                    result = array[pos];
+                    pos++;
+                }
+                else {
+                    result = initial;
+                }
+                while (pos < count) {
+                    result = f(result, array[pos]);
+                    pos++;
+                }
+                return result;
+            }
+        }
+        return initial;
+    }
+    ts.reduceLeft = reduceLeft;
+    function reduceRight(array, f, initial) {
+        if (array) {
+            var pos = array.length - 1;
+            if (pos >= 0) {
+                var result = void 0;
+                if (arguments.length <= 2) {
+                    result = array[pos];
+                    pos--;
+                }
+                else {
+                    result = initial;
+                }
+                while (pos >= 0) {
+                    result = f(result, array[pos]);
+                    pos--;
+                }
+                return result;
+            }
+        }
+        return initial;
+    }
+    ts.reduceRight = reduceRight;
+    var hasOwnProperty = Object.prototype.hasOwnProperty;
+    function hasProperty(map, key) {
+        return hasOwnProperty.call(map, key);
+    }
+    ts.hasProperty = hasProperty;
+    function getKeys(map) {
+        var keys = [];
+        for (var key in map) {
+            keys.push(key);
+        }
+        return keys;
+    }
+    ts.getKeys = getKeys;
+    function getProperty(map, key) {
+        return hasOwnProperty.call(map, key) ? map[key] : undefined;
+    }
+    ts.getProperty = getProperty;
+    function isEmpty(map) {
+        for (var id in map) {
+            if (hasProperty(map, id)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.isEmpty = isEmpty;
+    function clone(object) {
+        var result = {};
+        for (var id in object) {
+            result[id] = object[id];
+        }
+        return result;
+    }
+    ts.clone = clone;
+    function extend(first, second) {
+        var result = {};
+        for (var id in first) {
+            result[id] = first[id];
+        }
+        for (var id in second) {
+            if (!hasProperty(result, id)) {
+                result[id] = second[id];
+            }
+        }
+        return result;
+    }
+    ts.extend = extend;
+    function forEachValue(map, callback) {
+        var result;
+        for (var id in map) {
+            if (result = callback(map[id]))
+                break;
+        }
+        return result;
+    }
+    ts.forEachValue = forEachValue;
+    function forEachKey(map, callback) {
+        var result;
+        for (var id in map) {
+            if (result = callback(id))
+                break;
+        }
+        return result;
+    }
+    ts.forEachKey = forEachKey;
+    function lookUp(map, key) {
+        return hasProperty(map, key) ? map[key] : undefined;
+    }
+    ts.lookUp = lookUp;
+    function copyMap(source, target) {
+        for (var p in source) {
+            target[p] = source[p];
+        }
+    }
+    ts.copyMap = copyMap;
+    function arrayToMap(array, makeKey) {
+        var result = {};
+        forEach(array, function (value) {
+            result[makeKey(value)] = value;
+        });
+        return result;
+    }
+    ts.arrayToMap = arrayToMap;
+    function reduceProperties(map, callback, initial) {
+        var result = initial;
+        if (map) {
+            for (var key in map) {
+                if (hasProperty(map, key)) {
+                    result = callback(result, map[key], String(key));
+                }
+            }
+        }
+        return result;
+    }
+    ts.reduceProperties = reduceProperties;
+    function isArray(value) {
+        return Array.isArray ? Array.isArray(value) : value instanceof Array;
+    }
+    ts.isArray = isArray;
+    function memoize(callback) {
+        var value;
+        return function () {
+            if (callback) {
+                value = callback();
+                callback = undefined;
+            }
+            return value;
+        };
+    }
+    ts.memoize = memoize;
+    function formatStringFromArgs(text, args, baseIndex) {
+        baseIndex = baseIndex || 0;
+        return text.replace(/{(\d+)}/g, function (match, index) { return args[+index + baseIndex]; });
+    }
+    ts.localizedDiagnosticMessages = undefined;
+    function getLocaleSpecificMessage(message) {
+        return ts.localizedDiagnosticMessages && ts.localizedDiagnosticMessages[message.key]
+            ? ts.localizedDiagnosticMessages[message.key]
+            : message.message;
+    }
+    ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
+    function createFileDiagnostic(file, start, length, message) {
+        var end = start + length;
+        Debug.assert(start >= 0, "start must be non-negative, is " + start);
+        Debug.assert(length >= 0, "length must be non-negative, is " + length);
+        if (file) {
+            Debug.assert(start <= file.text.length, "start must be within the bounds of the file. " + start + " > " + file.text.length);
+            Debug.assert(end <= file.text.length, "end must be the bounds of the file. " + end + " > " + file.text.length);
+        }
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 4) {
+            text = formatStringFromArgs(text, arguments, 4);
+        }
+        return {
+            file: file,
+            start: start,
+            length: length,
+            messageText: text,
+            category: message.category,
+            code: message.code
+        };
+    }
+    ts.createFileDiagnostic = createFileDiagnostic;
+    function formatMessage(dummy, message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 2) {
+            text = formatStringFromArgs(text, arguments, 2);
+        }
+        return text;
+    }
+    ts.formatMessage = formatMessage;
+    function createCompilerDiagnostic(message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 1) {
+            text = formatStringFromArgs(text, arguments, 1);
+        }
+        return {
+            file: undefined,
+            start: undefined,
+            length: undefined,
+            messageText: text,
+            category: message.category,
+            code: message.code
+        };
+    }
+    ts.createCompilerDiagnostic = createCompilerDiagnostic;
+    function chainDiagnosticMessages(details, message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 2) {
+            text = formatStringFromArgs(text, arguments, 2);
+        }
+        return {
+            messageText: text,
+            category: message.category,
+            code: message.code,
+            next: details
+        };
+    }
+    ts.chainDiagnosticMessages = chainDiagnosticMessages;
+    function concatenateDiagnosticMessageChains(headChain, tailChain) {
+        var lastChain = headChain;
+        while (lastChain.next) {
+            lastChain = lastChain.next;
+        }
+        lastChain.next = tailChain;
+        return headChain;
+    }
+    ts.concatenateDiagnosticMessageChains = concatenateDiagnosticMessageChains;
+    function compareValues(a, b) {
+        if (a === b)
+            return 0;
+        if (a === undefined)
+            return -1;
+        if (b === undefined)
+            return 1;
+        return a < b ? -1 : 1;
+    }
+    ts.compareValues = compareValues;
+    function getDiagnosticFileName(diagnostic) {
+        return diagnostic.file ? diagnostic.file.fileName : undefined;
+    }
+    function compareDiagnostics(d1, d2) {
+        return compareValues(getDiagnosticFileName(d1), getDiagnosticFileName(d2)) ||
+            compareValues(d1.start, d2.start) ||
+            compareValues(d1.length, d2.length) ||
+            compareValues(d1.code, d2.code) ||
+            compareMessageText(d1.messageText, d2.messageText) ||
+            0;
+    }
+    ts.compareDiagnostics = compareDiagnostics;
+    function compareMessageText(text1, text2) {
+        while (text1 && text2) {
+            var string1 = typeof text1 === "string" ? text1 : text1.messageText;
+            var string2 = typeof text2 === "string" ? text2 : text2.messageText;
+            var res = compareValues(string1, string2);
+            if (res) {
+                return res;
+            }
+            text1 = typeof text1 === "string" ? undefined : text1.next;
+            text2 = typeof text2 === "string" ? undefined : text2.next;
+        }
+        if (!text1 && !text2) {
+            return 0;
+        }
+        return text1 ? 1 : -1;
+    }
+    function sortAndDeduplicateDiagnostics(diagnostics) {
+        return deduplicateSortedDiagnostics(diagnostics.sort(compareDiagnostics));
+    }
+    ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
+    function deduplicateSortedDiagnostics(diagnostics) {
+        if (diagnostics.length < 2) {
+            return diagnostics;
+        }
+        var newDiagnostics = [diagnostics[0]];
+        var previousDiagnostic = diagnostics[0];
+        for (var i = 1; i < diagnostics.length; i++) {
+            var currentDiagnostic = diagnostics[i];
+            var isDupe = compareDiagnostics(currentDiagnostic, previousDiagnostic) === 0;
+            if (!isDupe) {
+                newDiagnostics.push(currentDiagnostic);
+                previousDiagnostic = currentDiagnostic;
+            }
+        }
+        return newDiagnostics;
+    }
+    ts.deduplicateSortedDiagnostics = deduplicateSortedDiagnostics;
+    function normalizeSlashes(path) {
+        return path.replace(/\\/g, "/");
+    }
+    ts.normalizeSlashes = normalizeSlashes;
+    function getRootLength(path) {
+        if (path.charCodeAt(0) === 47) {
+            if (path.charCodeAt(1) !== 47)
+                return 1;
+            var p1 = path.indexOf("/", 2);
+            if (p1 < 0)
+                return 2;
+            var p2 = path.indexOf("/", p1 + 1);
+            if (p2 < 0)
+                return p1 + 1;
+            return p2 + 1;
+        }
+        if (path.charCodeAt(1) === 58) {
+            if (path.charCodeAt(2) === 47)
+                return 3;
+            return 2;
+        }
+        if (path.lastIndexOf("file:///", 0) === 0) {
+            return "file:///".length;
+        }
+        var idx = path.indexOf("://");
+        if (idx !== -1) {
+            return idx + "://".length;
+        }
+        return 0;
+    }
+    ts.getRootLength = getRootLength;
+    ts.directorySeparator = "/";
+    function getNormalizedParts(normalizedSlashedPath, rootLength) {
+        var parts = normalizedSlashedPath.substr(rootLength).split(ts.directorySeparator);
+        var normalized = [];
+        for (var _i = 0, parts_1 = parts; _i < parts_1.length; _i++) {
+            var part = parts_1[_i];
+            if (part !== ".") {
+                if (part === ".." && normalized.length > 0 && lastOrUndefined(normalized) !== "..") {
+                    normalized.pop();
+                }
+                else {
+                    if (part) {
+                        normalized.push(part);
+                    }
+                }
+            }
+        }
+        return normalized;
+    }
+    function normalizePath(path) {
+        path = normalizeSlashes(path);
+        var rootLength = getRootLength(path);
+        var normalized = getNormalizedParts(path, rootLength);
+        return path.substr(0, rootLength) + normalized.join(ts.directorySeparator);
+    }
+    ts.normalizePath = normalizePath;
+    function getDirectoryPath(path) {
+        return path.substr(0, Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator)));
+    }
+    ts.getDirectoryPath = getDirectoryPath;
+    function isUrl(path) {
+        return path && !isRootedDiskPath(path) && path.indexOf("://") !== -1;
+    }
+    ts.isUrl = isUrl;
+    function isRootedDiskPath(path) {
+        return getRootLength(path) !== 0;
+    }
+    ts.isRootedDiskPath = isRootedDiskPath;
+    function normalizedPathComponents(path, rootLength) {
+        var normalizedParts = getNormalizedParts(path, rootLength);
+        return [path.substr(0, rootLength)].concat(normalizedParts);
+    }
+    function getNormalizedPathComponents(path, currentDirectory) {
+        path = normalizeSlashes(path);
+        var rootLength = getRootLength(path);
+        if (rootLength === 0) {
+            path = combinePaths(normalizeSlashes(currentDirectory), path);
+            rootLength = getRootLength(path);
+        }
+        return normalizedPathComponents(path, rootLength);
+    }
+    ts.getNormalizedPathComponents = getNormalizedPathComponents;
+    function getNormalizedAbsolutePath(fileName, currentDirectory) {
+        return getNormalizedPathFromPathComponents(getNormalizedPathComponents(fileName, currentDirectory));
+    }
+    ts.getNormalizedAbsolutePath = getNormalizedAbsolutePath;
+    function getNormalizedPathFromPathComponents(pathComponents) {
+        if (pathComponents && pathComponents.length) {
+            return pathComponents[0] + pathComponents.slice(1).join(ts.directorySeparator);
+        }
+    }
+    ts.getNormalizedPathFromPathComponents = getNormalizedPathFromPathComponents;
+    function getNormalizedPathComponentsOfUrl(url) {
+        var urlLength = url.length;
+        var rootLength = url.indexOf("://") + "://".length;
+        while (rootLength < urlLength) {
+            if (url.charCodeAt(rootLength) === 47) {
+                rootLength++;
+            }
+            else {
+                break;
+            }
+        }
+        if (rootLength === urlLength) {
+            return [url];
+        }
+        var indexOfNextSlash = url.indexOf(ts.directorySeparator, rootLength);
+        if (indexOfNextSlash !== -1) {
+            rootLength = indexOfNextSlash + 1;
+            return normalizedPathComponents(url, rootLength);
+        }
+        else {
+            return [url + ts.directorySeparator];
+        }
+    }
+    function getNormalizedPathOrUrlComponents(pathOrUrl, currentDirectory) {
+        if (isUrl(pathOrUrl)) {
+            return getNormalizedPathComponentsOfUrl(pathOrUrl);
+        }
+        else {
+            return getNormalizedPathComponents(pathOrUrl, currentDirectory);
+        }
+    }
+    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
+        var pathComponents = getNormalizedPathOrUrlComponents(relativeOrAbsolutePath, currentDirectory);
+        var directoryComponents = getNormalizedPathOrUrlComponents(directoryPathOrUrl, currentDirectory);
+        if (directoryComponents.length > 1 && lastOrUndefined(directoryComponents) === "") {
+            directoryComponents.length--;
+        }
+        var joinStartIndex;
+        for (joinStartIndex = 0; joinStartIndex < pathComponents.length && joinStartIndex < directoryComponents.length; joinStartIndex++) {
+            if (getCanonicalFileName(directoryComponents[joinStartIndex]) !== getCanonicalFileName(pathComponents[joinStartIndex])) {
+                break;
+            }
+        }
+        if (joinStartIndex) {
+            var relativePath = "";
+            var relativePathComponents = pathComponents.slice(joinStartIndex, pathComponents.length);
+            for (; joinStartIndex < directoryComponents.length; joinStartIndex++) {
+                if (directoryComponents[joinStartIndex] !== "") {
+                    relativePath = relativePath + ".." + ts.directorySeparator;
+                }
+            }
+            return relativePath + relativePathComponents.join(ts.directorySeparator);
+        }
+        var absolutePath = getNormalizedPathFromPathComponents(pathComponents);
+        if (isAbsolutePathAnUrl && isRootedDiskPath(absolutePath)) {
+            absolutePath = "file:///" + absolutePath;
+        }
+        return absolutePath;
+    }
+    ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
+    function getBaseFileName(path) {
+        if (path === undefined) {
+            return undefined;
+        }
+        var i = path.lastIndexOf(ts.directorySeparator);
+        return i < 0 ? path : path.substring(i + 1);
+    }
+    ts.getBaseFileName = getBaseFileName;
+    function combinePaths(path1, path2) {
+        if (!(path1 && path1.length))
+            return path2;
+        if (!(path2 && path2.length))
+            return path1;
+        if (getRootLength(path2) !== 0)
+            return path2;
+        if (path1.charAt(path1.length - 1) === ts.directorySeparator)
+            return path1 + path2;
+        return path1 + ts.directorySeparator + path2;
+    }
+    ts.combinePaths = combinePaths;
+    function fileExtensionIs(path, extension) {
+        var pathLen = path.length;
+        var extLen = extension.length;
+        return pathLen > extLen && path.substr(pathLen - extLen, extLen) === extension;
+    }
+    ts.fileExtensionIs = fileExtensionIs;
+    function ensureScriptKind(fileName, scriptKind) {
+        return (scriptKind || getScriptKindFromFileName(fileName)) || 3;
+    }
+    ts.ensureScriptKind = ensureScriptKind;
+    function getScriptKindFromFileName(fileName) {
+        var ext = fileName.substr(fileName.lastIndexOf("."));
+        switch (ext.toLowerCase()) {
+            case ".js":
+                return 1;
+            case ".jsx":
+                return 2;
+            case ".ts":
+                return 3;
+            case ".tsx":
+                return 4;
+            default:
+                return 0;
+        }
+    }
+    ts.getScriptKindFromFileName = getScriptKindFromFileName;
+    ts.supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
+    ts.supportedJavascriptExtensions = [".js", ".jsx"];
+    var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
+    function getSupportedExtensions(options) {
+        return options && options.allowJs ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
+    }
+    ts.getSupportedExtensions = getSupportedExtensions;
+    function isSupportedSourceFileName(fileName, compilerOptions) {
+        if (!fileName) {
+            return false;
+        }
+        for (var _i = 0, _a = getSupportedExtensions(compilerOptions); _i < _a.length; _i++) {
+            var extension = _a[_i];
+            if (fileExtensionIs(fileName, extension)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.isSupportedSourceFileName = isSupportedSourceFileName;
+    var extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
+    function removeFileExtension(path) {
+        for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
+            var ext = extensionsToRemove_1[_i];
+            var extensionless = tryRemoveExtension(path, ext);
+            if (extensionless !== undefined) {
+                return extensionless;
+            }
+        }
+        return path;
+    }
+    ts.removeFileExtension = removeFileExtension;
+    function tryRemoveExtension(path, extension) {
+        return fileExtensionIs(path, extension) ? path.substring(0, path.length - extension.length) : undefined;
+    }
+    ts.tryRemoveExtension = tryRemoveExtension;
+    function isJsxOrTsxExtension(ext) {
+        return ext === ".jsx" || ext === ".tsx";
+    }
+    ts.isJsxOrTsxExtension = isJsxOrTsxExtension;
+    function Symbol(flags, name) {
+        this.flags = flags;
+        this.name = name;
+        this.declarations = undefined;
+    }
+    function Type(checker, flags) {
+        this.flags = flags;
+    }
+    function Signature(checker) {
+    }
+    function Node(kind, pos, end) {
+        this.kind = kind;
+        this.pos = pos;
+        this.end = end;
+        this.flags = 0;
+        this.parent = undefined;
+    }
+    ts.objectAllocator = {
+        getNodeConstructor: function () { return Node; },
+        getSourceFileConstructor: function () { return Node; },
+        getSymbolConstructor: function () { return Symbol; },
+        getTypeConstructor: function () { return Type; },
+        getSignatureConstructor: function () { return Signature; }
+    };
+    var Debug;
+    (function (Debug) {
+        var currentAssertionLevel = 0;
+        function shouldAssert(level) {
+            return currentAssertionLevel >= level;
+        }
+        Debug.shouldAssert = shouldAssert;
+        function assert(expression, message, verboseDebugInfo) {
+            if (!expression) {
+                var verboseDebugString = "";
+                if (verboseDebugInfo) {
+                    verboseDebugString = "\r\nVerbose Debug Information: " + verboseDebugInfo();
+                }
+                debugger;
+                throw new Error("Debug Failure. False expression: " + (message || "") + verboseDebugString);
+            }
+        }
+        Debug.assert = assert;
+        function fail(message) {
+            Debug.assert(false, message);
+        }
+        Debug.fail = fail;
+    })(Debug = ts.Debug || (ts.Debug = {}));
+    function copyListRemovingItem(item, list) {
+        var copiedList = [];
+        for (var _i = 0, list_1 = list; _i < list_1.length; _i++) {
+            var e = list_1[_i];
+            if (e !== item) {
+                copiedList.push(e);
+            }
+        }
+        return copiedList;
+    }
+    ts.copyListRemovingItem = copyListRemovingItem;
+    function createGetCanonicalFileName(useCaseSensitivefileNames) {
+        return useCaseSensitivefileNames
+            ? (function (fileName) { return fileName; })
+            : (function (fileName) { return fileName.toLowerCase(); });
+    }
+    ts.createGetCanonicalFileName = createGetCanonicalFileName;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.sys = (function () {
+        function getWScriptSystem() {
+            var fso = new ActiveXObject("Scripting.FileSystemObject");
+            var fileStream = new ActiveXObject("ADODB.Stream");
+            fileStream.Type = 2;
+            var binaryStream = new ActiveXObject("ADODB.Stream");
+            binaryStream.Type = 1;
+            var args = [];
+            for (var i = 0; i < WScript.Arguments.length; i++) {
+                args[i] = WScript.Arguments.Item(i);
+            }
+            function readFile(fileName, encoding) {
+                if (!fso.FileExists(fileName)) {
+                    return undefined;
+                }
+                fileStream.Open();
+                try {
+                    if (encoding) {
+                        fileStream.Charset = encoding;
+                        fileStream.LoadFromFile(fileName);
+                    }
+                    else {
+                        fileStream.Charset = "x-ansi";
+                        fileStream.LoadFromFile(fileName);
+                        var bom = fileStream.ReadText(2) || "";
+                        fileStream.Position = 0;
+                        fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
+                    }
+                    return fileStream.ReadText();
+                }
+                catch (e) {
+                    throw e;
+                }
+                finally {
+                    fileStream.Close();
+                }
+            }
+            function writeFile(fileName, data, writeByteOrderMark) {
+                fileStream.Open();
+                binaryStream.Open();
+                try {
+                    fileStream.Charset = "utf-8";
+                    fileStream.WriteText(data);
+                    if (writeByteOrderMark) {
+                        fileStream.Position = 0;
+                    }
+                    else {
+                        fileStream.Position = 3;
+                    }
+                    fileStream.CopyTo(binaryStream);
+                    binaryStream.SaveToFile(fileName, 2);
+                }
+                finally {
+                    binaryStream.Close();
+                    fileStream.Close();
+                }
+            }
+            function getCanonicalPath(path) {
+                return path.toLowerCase();
+            }
+            function getNames(collection) {
+                var result = [];
+                for (var e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
+                    result.push(e.item().Name);
+                }
+                return result.sort();
+            }
+            function getDirectories(path) {
+                var folder = fso.GetFolder(path);
+                return getNames(folder.subfolders);
+            }
+            function readDirectory(path, extension, exclude) {
+                var result = [];
+                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
+                visitDirectory(path);
+                return result;
+                function visitDirectory(path) {
+                    var folder = fso.GetFolder(path || ".");
+                    var files = getNames(folder.files);
+                    for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
+                        var current = files_1[_i];
+                        var name_1 = ts.combinePaths(path, current);
+                        if ((!extension || ts.fileExtensionIs(name_1, extension)) && !ts.contains(exclude, getCanonicalPath(name_1))) {
+                            result.push(name_1);
+                        }
+                    }
+                    var subfolders = getNames(folder.subfolders);
+                    for (var _a = 0, subfolders_1 = subfolders; _a < subfolders_1.length; _a++) {
+                        var current = subfolders_1[_a];
+                        var name_2 = ts.combinePaths(path, current);
+                        if (!ts.contains(exclude, getCanonicalPath(name_2))) {
+                            visitDirectory(name_2);
+                        }
+                    }
+                }
+            }
+            return {
+                args: args,
+                newLine: "\r\n",
+                useCaseSensitiveFileNames: false,
+                write: function (s) {
+                    WScript.StdOut.Write(s);
+                },
+                readFile: readFile,
+                writeFile: writeFile,
+                resolvePath: function (path) {
+                    return fso.GetAbsolutePathName(path);
+                },
+                fileExists: function (path) {
+                    return fso.FileExists(path);
+                },
+                directoryExists: function (path) {
+                    return fso.FolderExists(path);
+                },
+                createDirectory: function (directoryName) {
+                    if (!this.directoryExists(directoryName)) {
+                        fso.CreateFolder(directoryName);
+                    }
+                },
+                getExecutingFilePath: function () {
+                    return WScript.ScriptFullName;
+                },
+                getCurrentDirectory: function () {
+                    return new ActiveXObject("WScript.Shell").CurrentDirectory;
+                },
+                getDirectories: getDirectories,
+                readDirectory: readDirectory,
+                exit: function (exitCode) {
+                    try {
+                        WScript.Quit(exitCode);
+                    }
+                    catch (e) {
+                    }
+                }
+            };
+        }
+        function getNodeSystem() {
+            var _fs = require("fs");
+            var _path = require("path");
+            var _os = require("os");
+            var _crypto = require("crypto");
+            var useNonPollingWatchers = process.env["TSC_NONPOLLING_WATCHER"];
+            function createWatchedFileSet() {
+                var dirWatchers = {};
+                var fileWatcherCallbacks = {};
+                return { addFile: addFile, removeFile: removeFile };
+                function reduceDirWatcherRefCountForFile(fileName) {
+                    var dirName = ts.getDirectoryPath(fileName);
+                    if (ts.hasProperty(dirWatchers, dirName)) {
+                        var watcher = dirWatchers[dirName];
+                        watcher.referenceCount -= 1;
+                        if (watcher.referenceCount <= 0) {
+                            watcher.close();
+                            delete dirWatchers[dirName];
+                        }
+                    }
+                }
+                function addDirWatcher(dirPath) {
+                    if (ts.hasProperty(dirWatchers, dirPath)) {
+                        var watcher_1 = dirWatchers[dirPath];
+                        watcher_1.referenceCount += 1;
+                        return;
+                    }
+                    var watcher = _fs.watch(dirPath, { persistent: true }, function (eventName, relativeFileName) { return fileEventHandler(eventName, relativeFileName, dirPath); });
+                    watcher.referenceCount = 1;
+                    dirWatchers[dirPath] = watcher;
+                    return;
+                }
+                function addFileWatcherCallback(filePath, callback) {
+                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
+                        fileWatcherCallbacks[filePath].push(callback);
+                    }
+                    else {
+                        fileWatcherCallbacks[filePath] = [callback];
+                    }
+                }
+                function addFile(fileName, callback) {
+                    addFileWatcherCallback(fileName, callback);
+                    addDirWatcher(ts.getDirectoryPath(fileName));
+                    return { fileName: fileName, callback: callback };
+                }
+                function removeFile(watchedFile) {
+                    removeFileWatcherCallback(watchedFile.fileName, watchedFile.callback);
+                    reduceDirWatcherRefCountForFile(watchedFile.fileName);
+                }
+                function removeFileWatcherCallback(filePath, callback) {
+                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
+                        var newCallbacks = ts.copyListRemovingItem(callback, fileWatcherCallbacks[filePath]);
+                        if (newCallbacks.length === 0) {
+                            delete fileWatcherCallbacks[filePath];
+                        }
+                        else {
+                            fileWatcherCallbacks[filePath] = newCallbacks;
+                        }
+                    }
+                }
+                function fileEventHandler(eventName, relativeFileName, baseDirPath) {
+                    var fileName = typeof relativeFileName !== "string"
+                        ? undefined
+                        : ts.getNormalizedAbsolutePath(relativeFileName, baseDirPath);
+                    if ((eventName === "change" || eventName === "rename") && ts.hasProperty(fileWatcherCallbacks, fileName)) {
+                        for (var _i = 0, _a = fileWatcherCallbacks[fileName]; _i < _a.length; _i++) {
+                            var fileCallback = _a[_i];
+                            fileCallback(fileName);
+                        }
+                    }
+                }
+            }
+            var watchedFileSet = createWatchedFileSet();
+            function isNode4OrLater() {
+                return parseInt(process.version.charAt(1)) >= 4;
+            }
+            var platform = _os.platform();
+            var useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
+            function readFile(fileName, encoding) {
+                if (!fileExists(fileName)) {
+                    return undefined;
+                }
+                var buffer = _fs.readFileSync(fileName);
+                var len = buffer.length;
+                if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
+                    len &= ~1;
+                    for (var i = 0; i < len; i += 2) {
+                        var temp = buffer[i];
+                        buffer[i] = buffer[i + 1];
+                        buffer[i + 1] = temp;
+                    }
+                    return buffer.toString("utf16le", 2);
+                }
+                if (len >= 2 && buffer[0] === 0xFF && buffer[1] === 0xFE) {
+                    return buffer.toString("utf16le", 2);
+                }
+                if (len >= 3 && buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
+                    return buffer.toString("utf8", 3);
+                }
+                return buffer.toString("utf8");
+            }
+            function writeFile(fileName, data, writeByteOrderMark) {
+                if (writeByteOrderMark) {
+                    data = "\uFEFF" + data;
+                }
+                var fd;
+                try {
+                    fd = _fs.openSync(fileName, "w");
+                    _fs.writeSync(fd, data, undefined, "utf8");
+                }
+                finally {
+                    if (fd !== undefined) {
+                        _fs.closeSync(fd);
+                    }
+                }
+            }
+            function getCanonicalPath(path) {
+                return useCaseSensitiveFileNames ? path : path.toLowerCase();
+            }
+            function fileSystemEntryExists(path, entryKind) {
+                try {
+                    var stat = _fs.statSync(path);
+                    switch (entryKind) {
+                        case 0: return stat.isFile();
+                        case 1: return stat.isDirectory();
+                    }
+                }
+                catch (e) {
+                    return false;
+                }
+            }
+            function fileExists(path) {
+                return fileSystemEntryExists(path, 0);
+            }
+            function directoryExists(path) {
+                return fileSystemEntryExists(path, 1);
+            }
+            function getDirectories(path) {
+                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1); });
+            }
+            function readDirectory(path, extension, exclude) {
+                var result = [];
+                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
+                visitDirectory(path);
+                return result;
+                function visitDirectory(path) {
+                    var files = _fs.readdirSync(path || ".").sort();
+                    var directories = [];
+                    for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
+                        var current = files_2[_i];
+                        if (current === "." || current === "..") {
+                            continue;
+                        }
+                        var name_3 = ts.combinePaths(path, current);
+                        if (!ts.contains(exclude, getCanonicalPath(name_3))) {
+                            var stat = _fs.statSync(name_3);
+                            if (stat.isFile()) {
+                                if (!extension || ts.fileExtensionIs(name_3, extension)) {
+                                    result.push(name_3);
+                                }
+                            }
+                            else if (stat.isDirectory()) {
+                                directories.push(name_3);
+                            }
+                        }
+                    }
+                    for (var _a = 0, directories_1 = directories; _a < directories_1.length; _a++) {
+                        var current = directories_1[_a];
+                        visitDirectory(current);
+                    }
+                }
+            }
+            return {
+                args: process.argv.slice(2),
+                newLine: _os.EOL,
+                useCaseSensitiveFileNames: useCaseSensitiveFileNames,
+                write: function (s) {
+                    process.stdout.write(s);
+                },
+                readFile: readFile,
+                writeFile: writeFile,
+                watchFile: function (fileName, callback) {
+                    if (useNonPollingWatchers) {
+                        var watchedFile_1 = watchedFileSet.addFile(fileName, callback);
+                        return {
+                            close: function () { return watchedFileSet.removeFile(watchedFile_1); }
+                        };
+                    }
+                    else {
+                        _fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
+                        return {
+                            close: function () { return _fs.unwatchFile(fileName, fileChanged); }
+                        };
+                    }
+                    function fileChanged(curr, prev) {
+                        if (+curr.mtime <= +prev.mtime) {
+                            return;
+                        }
+                        callback(fileName);
+                    }
+                },
+                watchDirectory: function (directoryName, callback, recursive) {
+                    var options;
+                    if (isNode4OrLater() && (process.platform === "win32" || process.platform === "darwin")) {
+                        options = { persistent: true, recursive: !!recursive };
+                    }
+                    else {
+                        options = { persistent: true };
+                    }
+                    return _fs.watch(directoryName, options, function (eventName, relativeFileName) {
+                        if (eventName === "rename") {
+                            callback(!relativeFileName ? relativeFileName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
+                        }
+                        ;
+                    });
+                },
+                resolvePath: function (path) {
+                    return _path.resolve(path);
+                },
+                fileExists: fileExists,
+                directoryExists: directoryExists,
+                createDirectory: function (directoryName) {
+                    if (!this.directoryExists(directoryName)) {
+                        _fs.mkdirSync(directoryName);
+                    }
+                },
+                getExecutingFilePath: function () {
+                    return __filename;
+                },
+                getCurrentDirectory: function () {
+                    return process.cwd();
+                },
+                getDirectories: getDirectories,
+                readDirectory: readDirectory,
+                getModifiedTime: function (path) {
+                    try {
+                        return _fs.statSync(path).mtime;
+                    }
+                    catch (e) {
+                        return undefined;
+                    }
+                },
+                createHash: function (data) {
+                    var hash = _crypto.createHash("md5");
+                    hash.update(data);
+                    return hash.digest("hex");
+                },
+                getMemoryUsage: function () {
+                    if (global.gc) {
+                        global.gc();
+                    }
+                    return process.memoryUsage().heapUsed;
+                },
+                exit: function (exitCode) {
+                    process.exit(exitCode);
+                },
+                realpath: function (path) {
+                    return _fs.realpathSync(path);
+                }
+            };
+        }
+        function getChakraSystem() {
+            var realpath = ChakraHost.realpath && (function (path) { return ChakraHost.realpath(path); });
+            return {
+                newLine: ChakraHost.newLine || "\r\n",
+                args: ChakraHost.args,
+                useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
+                write: ChakraHost.echo,
+                readFile: function (path, encoding) {
+                    return ChakraHost.readFile(path);
+                },
+                writeFile: function (path, data, writeByteOrderMark) {
+                    if (writeByteOrderMark) {
+                        data = "\uFEFF" + data;
+                    }
+                    ChakraHost.writeFile(path, data);
+                },
+                resolvePath: ChakraHost.resolvePath,
+                fileExists: ChakraHost.fileExists,
+                directoryExists: ChakraHost.directoryExists,
+                createDirectory: ChakraHost.createDirectory,
+                getExecutingFilePath: function () { return ChakraHost.executingFile; },
+                getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
+                getDirectories: ChakraHost.getDirectories,
+                readDirectory: ChakraHost.readDirectory,
+                exit: ChakraHost.quit,
+                realpath: realpath
+            };
+        }
+        if (typeof ChakraHost !== "undefined") {
+            return getChakraSystem();
+        }
+        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
+            return getWScriptSystem();
+        }
+        else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
+            return getNodeSystem();
+        }
+        else {
+            return undefined;
+        }
+    })();
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.Diagnostics = {
+        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
+        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
+        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
+        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
+        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
+        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
+        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
+        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
+        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
+        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
+        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
+        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
+        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
+        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
+        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
+        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
+        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
+        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
+        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
+        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
+        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
+        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
+        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
+        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
+        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
+        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
+        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
+        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
+        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
+        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
+        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
+        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
+        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
+        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
+        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
+        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
+        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
+        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
+        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
+        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
+        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
+        Type_0_is_not_a_valid_async_function_return_type: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_1055", message: "Type '{0}' is not a valid async function return type." },
+        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
+        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
+        Operand_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "Operand_for_await_does_not_have_a_valid_callable_then_member_1058", message: "Operand for 'await' does not have a valid callable 'then' member." },
+        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: { code: 1059, category: ts.DiagnosticCategory.Error, key: "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059", message: "Return expression in async function does not have a valid callable 'then' member." },
+        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: { code: 1060, category: ts.DiagnosticCategory.Error, key: "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060", message: "Expression body for async arrow function does not have a valid callable 'then' member." },
+        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
+        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
+        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
+        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
+        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
+        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
+        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
+        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
+        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
+        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
+        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher." },
+        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
+        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
+        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
+        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
+        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
+        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
+        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
+        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
+        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
+        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
+        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
+        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
+        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
+        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
+        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
+        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
+        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
+        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
+        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
+        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
+        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
+        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'" },
+        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
+        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
+        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
+        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
+        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
+        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
+        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
+        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
+        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
+        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
+        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
+        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
+        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
+        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
+        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
+        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
+        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
+        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
+        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
+        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
+        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
+        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
+        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
+        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
+        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
+        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
+        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
+        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
+        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
+        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
+        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
+        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
+        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
+        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
+        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
+        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
+        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
+        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
+        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
+        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
+        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
+        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
+        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
+        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
+        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
+        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
+        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
+        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
+        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
+        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
+        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
+        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
+        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
+        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
+        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
+        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
+        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
+        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
+        A_parameter_property_may_not_be_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_a_binding_pattern_1187", message: "A parameter property may not be a binding pattern." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
+        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
+        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
+        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
+        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
+        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
+        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
+        Catch_clause_variable_name_must_be_an_identifier: { code: 1195, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_name_must_be_an_identifier_1195", message: "Catch clause variable name must be an identifier." },
+        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
+        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
+        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
+        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
+        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asteri_1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_defaul_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
+        Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
+        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
+        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
+        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
+        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
+        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
+        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name" },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode" },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
+        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
+        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
+        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
+        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
+        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
+        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
+        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
+        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
+        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
+        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
+        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
+        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
+        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
+        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
+        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
+        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
+        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
+        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
+        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
+        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
+        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
+        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
+        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
+        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
+        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
+        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
+        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
+        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
+        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
+        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
+        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
+        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
+        _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: { code: 1253, category: ts.DiagnosticCategory.Error, key: "_0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag_1253", message: "'{0}' tag cannot be used independently as a top level JSDoc tag." },
+        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
+        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
+        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
+        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
+        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
+        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
+        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
+        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
+        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
+        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
+        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
+        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
+        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
+        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
+        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
+        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
+        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
+        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
+        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
+        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
+        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
+        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
+        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
+        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
+        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
+        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
+        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
+        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
+        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
+        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
+        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
+        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
+        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
+        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
+        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
+        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
+        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
+        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
+        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
+        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
+        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
+        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
+        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
+        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
+        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
+        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
+        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
+        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
+        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
+        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
+        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
+        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
+        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
+        Supplied_parameters_do_not_match_any_signature_of_call_target: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Supplied_parameters_do_not_match_any_signature_of_call_target_2346", message: "Supplied parameters do not match any signature of call target." },
+        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
+        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
+        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_2349", message: "Cannot invoke an expression whose type lacks a call signature." },
+        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
+        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
+        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
+        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
+        No_best_common_type_exists_among_return_expressions: { code: 2354, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_return_expressions_2354", message: "No best common type exists among return expressions." },
+        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
+        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
+        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357", message: "The operand of an increment or decrement operator must be a variable, property or indexer." },
+        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
+        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
+        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
+        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter" },
+        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_of_assignment_expression_2364", message: "Invalid left-hand side of assignment expression." },
+        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
+        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
+        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'" },
+        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
+        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
+        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
+        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
+        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
+        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
+        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
+        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
+        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
+        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
+        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
+        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
+        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
+        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
+        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
+        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
+        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
+        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
+        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
+        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
+        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
+        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
+        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
+        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
+        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
+        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
+        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
+        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
+        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
+        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
+        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
+        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
+        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
+        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
+        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
+        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
+        Invalid_left_hand_side_in_for_in_statement: { code: 2406, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_in_statement_2406", message: "Invalid left-hand side in 'for...in' statement." },
+        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
+        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
+        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class" },
+        All_symbols_within_a_with_block_will_be_resolved_to_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "All_symbols_within_a_with_block_will_be_resolved_to_any_2410", message: "All symbols within a 'with' block will be resolved to 'any'." },
+        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
+        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
+        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
+        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'" },
+        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
+        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
+        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
+        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
+        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
+        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
+        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'" },
+        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
+        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
+        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'" },
+        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
+        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged" },
+        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged" },
+        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
+        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
+        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name" },
+        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'" },
+        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
+        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'" },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
+        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
+        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
+        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
+        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
+        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
+        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
+        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
+        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: { code: 2449, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449", message: "The operand of an increment or decrement operator cannot be a constant or a read-only property." },
+        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450", message: "Left-hand side of assignment expression cannot be a constant or a read-only property." },
+        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
+        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
+        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
+        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
+        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
+        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
+        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'" },
+        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
+        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
+        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
+        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
+        A_rest_element_must_be_last_in_an_array_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462", message: "A rest element must be last in an array destructuring pattern" },
+        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
+        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
+        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
+        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
+        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
+        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
+        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
+        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
+        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
+        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
+        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
+        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
+        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
+        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
+        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
+        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
+        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
+        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
+        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
+        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
+        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'" },
+        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2485, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485", message: "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property." },
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2486, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486", message: "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property." },
+        Invalid_left_hand_side_in_for_of_statement: { code: 2487, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_of_statement_2487", message: "Invalid left-hand side in 'for...of' statement." },
+        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
+        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
+        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
+        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause" },
+        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
+        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
+        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
+        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
+        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
+        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
+        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
+        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
+        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
+        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
+        No_best_common_type_exists_among_yield_expressions: { code: 2504, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_yield_expressions_2504", message: "No best common type exists among yield expressions." },
+        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
+        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
+        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
+        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
+        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
+        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
+        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
+        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
+        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
+        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
+        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
+        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
+        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
+        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
+        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
+        The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_function_expression: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_2522", message: "The 'arguments' object cannot be referenced in an async arrow function. Consider using a standard async function expression." },
+        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
+        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
+        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
+        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
+        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
+        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
+        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
+        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
+        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
+        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
+        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
+        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
+        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
+        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
+        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'" },
+        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
+        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
+        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
+        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property" },
+        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property" },
+        Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: ts.DiagnosticCategory.Error, key: "Cannot_emit_namespaced_JSX_elements_in_React_2650", message: "Cannot emit namespaced JSX elements in React" },
+        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
+        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
+        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
+        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
+        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
+        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element" },
+        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'" },
+        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
+        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
+        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
+        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
+        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
+        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
+        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
+        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
+        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
+        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
+        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
+        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
+        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
+        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
+        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
+        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
+        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
+        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
+        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
+        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: { code: 2679, category: ts.DiagnosticCategory.Error, key: "A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void_2679", message: "A function that is called with the 'new' keyword cannot have a 'this' type that is 'void'." },
+        A_this_parameter_must_be_the_first_parameter: { code: 2680, category: ts.DiagnosticCategory.Error, key: "A_this_parameter_must_be_the_first_parameter_2680", message: "A 'this' parameter must be the first parameter." },
+        A_constructor_cannot_have_a_this_parameter: { code: 2681, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_have_a_this_parameter_2681", message: "A constructor cannot have a 'this' parameter." },
+        get_and_set_accessor_must_have_the_same_this_type: { code: 2682, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_this_type_2682", message: "'get' and 'set' accessor must have the same 'this' type." },
+        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
+        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
+        The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
+        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
+        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
+        Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
+        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4006, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4006", message: "Type parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4008, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4008", message: "Type parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4010, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4010", message: "Type parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4012, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4012", message: "Type parameter '{0}' of public method from exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4014, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", message: "Type parameter '{0}' of method from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4016, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", message: "Type parameter '{0}' of exported function has or is using private name '{1}'." },
+        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4019, category: ts.DiagnosticCategory.Error, key: "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", message: "Implements clause of exported class '{0}' has or is using private name '{1}'." },
+        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
+        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "Extends clause of exported interface '{0}' has or is using private name '{1}'." },
+        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4023, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", message: "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named." },
+        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: { code: 4024, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", message: "Exported variable '{0}' has or is using name '{1}' from private module '{2}'." },
+        Exported_variable_0_has_or_is_using_private_name_1: { code: 4025, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_private_name_1_4025", message: "Exported variable '{0}' has or is using private name '{1}'." },
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4026, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026", message: "Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4027, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4027", message: "Public static property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
+        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4028, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_private_name_1_4028", message: "Public static property '{0}' of exported class has or is using private name '{1}'." },
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4029, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029", message: "Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4030, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4030", message: "Public property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
+        Public_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4031, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_private_name_1_4031", message: "Public property '{0}' of exported class has or is using private name '{1}'." },
+        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4032, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4032", message: "Property '{0}' of exported interface has or is using name '{1}' from private module '{2}'." },
+        Property_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4033, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_private_name_1_4033", message: "Property '{0}' of exported interface has or is using private name '{1}'." },
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4034, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_4034", message: "Parameter '{0}' of public static property setter from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4035, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1_4035", message: "Parameter '{0}' of public static property setter from exported class has or is using private name '{1}'." },
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4036, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_4036", message: "Parameter '{0}' of public property setter from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4037, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1_4037", message: "Parameter '{0}' of public property setter from exported class has or is using private name '{1}'." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4038, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_externa_4038", message: "Return type of public static property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4039, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_4039", message: "Return type of public static property getter from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4040, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0_4040", message: "Return type of public static property getter from exported class has or is using private name '{0}'." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4041, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_modul_4041", message: "Return type of public property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4042, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_4042", message: "Return type of public property getter from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4043, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0_4043", message: "Return type of public property getter from exported class has or is using private name '{0}'." },
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4044, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_mod_4044", message: "Return type of constructor signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4045, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0_4045", message: "Return type of constructor signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4046, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4046", message: "Return type of call signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4047, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0_4047", message: "Return type of call signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4048, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4048", message: "Return type of index signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4049, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0_4049", message: "Return type of index signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4050, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module__4050", message: "Return type of public static method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4051, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4051", message: "Return type of public static method from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: { code: 4052, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0_4052", message: "Return type of public static method from exported class has or is using private name '{0}'." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4053, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_c_4053", message: "Return type of public method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4054, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4054", message: "Return type of public method from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: { code: 4055, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0_4055", message: "Return type of public method from exported class has or is using private name '{0}'." },
+        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4056, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4056", message: "Return type of method from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: { code: 4057, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0_4057", message: "Return type of method from exported interface has or is using private name '{0}'." },
+        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4058, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named_4058", message: "Return type of exported function has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: { code: 4059, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1_4059", message: "Return type of exported function has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_exported_function_has_or_is_using_private_name_0: { code: 4060, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_private_name_0_4060", message: "Return type of exported function has or is using private name '{0}'." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4061, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_can_4061", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4062, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2_4062", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: { code: 4063, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1_4063", message: "Parameter '{0}' of constructor from exported class has or is using private name '{1}'." },
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4064, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_mod_4064", message: "Parameter '{0}' of constructor signature from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4065, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4065", message: "Parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4066, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4066", message: "Parameter '{0}' of call signature from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4067, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4067", message: "Parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4068, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module__4068", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4069, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4069", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4070, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4070", message: "Parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4071, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_c_4071", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4072, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4072", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4073, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4073", message: "Parameter '{0}' of public method from exported class has or is using private name '{1}'." },
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4074, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4074", message: "Parameter '{0}' of method from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4075, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4075", message: "Parameter '{0}' of method from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4076, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4076", message: "Parameter '{0}' of exported function has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: { code: 4077, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2_4077", message: "Parameter '{0}' of exported function has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4078, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", message: "Parameter '{0}' of exported function has or is using private name '{1}'." },
+        Exported_type_alias_0_has_or_is_using_private_name_1: { code: 4081, category: ts.DiagnosticCategory.Error, key: "Exported_type_alias_0_has_or_is_using_private_name_1_4081", message: "Exported type alias '{0}' has or is using private name '{1}'." },
+        Default_export_of_the_module_has_or_is_using_private_name_0: { code: 4082, category: ts.DiagnosticCategory.Error, key: "Default_export_of_the_module_has_or_is_using_private_name_0_4082", message: "Default export of the module has or is using private name '{0}'." },
+        Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict: { code: 4090, category: ts.DiagnosticCategory.Message, key: "Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_t_4090", message: "Conflicting library definitions for '{0}' found at '{1}' and '{2}'. Copy the correct file to the 'typings' folder to resolve this conflict." },
+        The_current_host_does_not_support_the_0_option: { code: 5001, category: ts.DiagnosticCategory.Error, key: "The_current_host_does_not_support_the_0_option_5001", message: "The current host does not support the '{0}' option." },
+        Cannot_find_the_common_subdirectory_path_for_the_input_files: { code: 5009, category: ts.DiagnosticCategory.Error, key: "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", message: "Cannot find the common subdirectory path for the input files." },
+        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}" },
+        Unsupported_file_encoding: { code: 5013, category: ts.DiagnosticCategory.Error, key: "Unsupported_file_encoding_5013", message: "Unsupported file encoding." },
+        Failed_to_parse_file_0_Colon_1: { code: 5014, category: ts.DiagnosticCategory.Error, key: "Failed_to_parse_file_0_Colon_1_5014", message: "Failed to parse file '{0}': {1}." },
+        Unknown_compiler_option_0: { code: 5023, category: ts.DiagnosticCategory.Error, key: "Unknown_compiler_option_0_5023", message: "Unknown compiler option '{0}'." },
+        Compiler_option_0_requires_a_value_of_type_1: { code: 5024, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_requires_a_value_of_type_1_5024", message: "Compiler option '{0}' requires a value of type {1}." },
+        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}" },
+        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: { code: 5042, category: ts.DiagnosticCategory.Error, key: "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", message: "Option 'project' cannot be mixed with source files on a command line." },
+        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: { code: 5047, category: ts.DiagnosticCategory.Error, key: "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", message: "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher." },
+        Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: { code: 5051, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided_5051", message: "Option '{0} can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided." },
+        Option_0_cannot_be_specified_without_specifying_option_1: { code: 5052, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_without_specifying_option_1_5052", message: "Option '{0}' cannot be specified without specifying option '{1}'." },
+        Option_0_cannot_be_specified_with_option_1: { code: 5053, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_with_option_1_5053", message: "Option '{0}' cannot be specified with option '{1}'." },
+        A_tsconfig_json_file_is_already_defined_at_Colon_0: { code: 5054, category: ts.DiagnosticCategory.Error, key: "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", message: "A 'tsconfig.json' file is already defined at: '{0}'." },
+        Cannot_write_file_0_because_it_would_overwrite_input_file: { code: 5055, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", message: "Cannot write file '{0}' because it would overwrite input file." },
+        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: { code: 5056, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", message: "Cannot write file '{0}' because it would be overwritten by multiple input files." },
+        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'" },
+        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'" },
+        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: { code: 5059, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", message: "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier." },
+        Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
+        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
+        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
+        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
+        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
+        Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
+        Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
+        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: { code: 6003, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", message: "Specify the location where debugger should locate map files instead of generated locations." },
+        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: { code: 6004, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations_6004", message: "Specify the location where debugger should locate TypeScript files instead of source locations." },
+        Watch_input_files: { code: 6005, category: ts.DiagnosticCategory.Message, key: "Watch_input_files_6005", message: "Watch input files." },
+        Redirect_output_structure_to_the_directory: { code: 6006, category: ts.DiagnosticCategory.Message, key: "Redirect_output_structure_to_the_directory_6006", message: "Redirect output structure to the directory." },
+        Do_not_erase_const_enum_declarations_in_generated_code: { code: 6007, category: ts.DiagnosticCategory.Message, key: "Do_not_erase_const_enum_declarations_in_generated_code_6007", message: "Do not erase const enum declarations in generated code." },
+        Do_not_emit_outputs_if_any_errors_were_reported: { code: 6008, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_if_any_errors_were_reported_6008", message: "Do not emit outputs if any errors were reported." },
+        Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
+        Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
+        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
+        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
+        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
+        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
+        Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
+        Print_the_compiler_s_version: { code: 6019, category: ts.DiagnosticCategory.Message, key: "Print_the_compiler_s_version_6019", message: "Print the compiler's version." },
+        Compile_the_project_in_the_given_directory: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_in_the_given_directory_6020", message: "Compile the project in the given directory." },
+        Syntax_Colon_0: { code: 6023, category: ts.DiagnosticCategory.Message, key: "Syntax_Colon_0_6023", message: "Syntax: {0}" },
+        options: { code: 6024, category: ts.DiagnosticCategory.Message, key: "options_6024", message: "options" },
+        file: { code: 6025, category: ts.DiagnosticCategory.Message, key: "file_6025", message: "file" },
+        Examples_Colon_0: { code: 6026, category: ts.DiagnosticCategory.Message, key: "Examples_Colon_0_6026", message: "Examples: {0}" },
+        Options_Colon: { code: 6027, category: ts.DiagnosticCategory.Message, key: "Options_Colon_6027", message: "Options:" },
+        Version_0: { code: 6029, category: ts.DiagnosticCategory.Message, key: "Version_0_6029", message: "Version {0}" },
+        Insert_command_line_options_and_files_from_a_file: { code: 6030, category: ts.DiagnosticCategory.Message, key: "Insert_command_line_options_and_files_from_a_file_6030", message: "Insert command line options and files from a file." },
+        File_change_detected_Starting_incremental_compilation: { code: 6032, category: ts.DiagnosticCategory.Message, key: "File_change_detected_Starting_incremental_compilation_6032", message: "File change detected. Starting incremental compilation..." },
+        KIND: { code: 6034, category: ts.DiagnosticCategory.Message, key: "KIND_6034", message: "KIND" },
+        FILE: { code: 6035, category: ts.DiagnosticCategory.Message, key: "FILE_6035", message: "FILE" },
+        VERSION: { code: 6036, category: ts.DiagnosticCategory.Message, key: "VERSION_6036", message: "VERSION" },
+        LOCATION: { code: 6037, category: ts.DiagnosticCategory.Message, key: "LOCATION_6037", message: "LOCATION" },
+        DIRECTORY: { code: 6038, category: ts.DiagnosticCategory.Message, key: "DIRECTORY_6038", message: "DIRECTORY" },
+        Compilation_complete_Watching_for_file_changes: { code: 6042, category: ts.DiagnosticCategory.Message, key: "Compilation_complete_Watching_for_file_changes_6042", message: "Compilation complete. Watching for file changes." },
+        Generates_corresponding_map_file: { code: 6043, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_map_file_6043", message: "Generates corresponding '.map' file." },
+        Compiler_option_0_expects_an_argument: { code: 6044, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_expects_an_argument_6044", message: "Compiler option '{0}' expects an argument." },
+        Unterminated_quoted_string_in_response_file_0: { code: 6045, category: ts.DiagnosticCategory.Error, key: "Unterminated_quoted_string_in_response_file_0_6045", message: "Unterminated quoted string in response file '{0}'." },
+        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}" },
+        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: { code: 6048, category: ts.DiagnosticCategory.Error, key: "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", message: "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'." },
+        Unsupported_locale_0: { code: 6049, category: ts.DiagnosticCategory.Error, key: "Unsupported_locale_0_6049", message: "Unsupported locale '{0}'." },
+        Unable_to_open_file_0: { code: 6050, category: ts.DiagnosticCategory.Error, key: "Unable_to_open_file_0_6050", message: "Unable to open file '{0}'." },
+        Corrupted_locale_file_0: { code: 6051, category: ts.DiagnosticCategory.Error, key: "Corrupted_locale_file_0_6051", message: "Corrupted locale file {0}." },
+        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: { code: 6052, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_expressions_and_declarations_with_an_implied_any_type_6052", message: "Raise error on expressions and declarations with an implied 'any' type." },
+        File_0_not_found: { code: 6053, category: ts.DiagnosticCategory.Error, key: "File_0_not_found_6053", message: "File '{0}' not found." },
+        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: { code: 6054, category: ts.DiagnosticCategory.Error, key: "File_0_has_unsupported_extension_The_only_supported_extensions_are_1_6054", message: "File '{0}' has unsupported extension. The only supported extensions are {1}." },
+        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: { code: 6055, category: ts.DiagnosticCategory.Message, key: "Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures_6055", message: "Suppress noImplicitAny errors for indexing objects lacking index signatures." },
+        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: { code: 6056, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_declarations_for_code_that_has_an_internal_annotation_6056", message: "Do not emit declarations for code that has an '@internal' annotation." },
+        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: { code: 6058, category: ts.DiagnosticCategory.Message, key: "Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir_6058", message: "Specify the root directory of input files. Use to control the output directory structure with --outDir." },
+        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: { code: 6059, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files_6059", message: "File '{0}' is not under 'rootDir' '{1}'. 'rootDir' is expected to contain all source files." },
+        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: { code: 6060, category: ts.DiagnosticCategory.Message, key: "Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix_6060", message: "Specify the end of line sequence to be used when emitting files: 'CRLF' (dos) or 'LF' (unix)." },
+        NEWLINE: { code: 6061, category: ts.DiagnosticCategory.Message, key: "NEWLINE_6061", message: "NEWLINE" },
+        Option_0_can_only_be_specified_in_tsconfig_json_file: { code: 6064, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_specified_in_tsconfig_json_file_6064", message: "Option '{0}' can only be specified in 'tsconfig.json' file." },
+        Enables_experimental_support_for_ES7_decorators: { code: 6065, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_decorators_6065", message: "Enables experimental support for ES7 decorators." },
+        Enables_experimental_support_for_emitting_type_metadata_for_decorators: { code: 6066, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_emitting_type_metadata_for_decorators_6066", message: "Enables experimental support for emitting type metadata for decorators." },
+        Enables_experimental_support_for_ES7_async_functions: { code: 6068, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_async_functions_6068", message: "Enables experimental support for ES7 async functions." },
+        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: { code: 6069, category: ts.DiagnosticCategory.Message, key: "Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6_6069", message: "Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6)." },
+        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: { code: 6070, category: ts.DiagnosticCategory.Message, key: "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", message: "Initializes a TypeScript project and creates a tsconfig.json file." },
+        Successfully_created_a_tsconfig_json_file: { code: 6071, category: ts.DiagnosticCategory.Message, key: "Successfully_created_a_tsconfig_json_file_6071", message: "Successfully created a tsconfig.json file." },
+        Suppress_excess_property_checks_for_object_literals: { code: 6072, category: ts.DiagnosticCategory.Message, key: "Suppress_excess_property_checks_for_object_literals_6072", message: "Suppress excess property checks for object literals." },
+        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context. (experimental)" },
+        Do_not_report_errors_on_unused_labels: { code: 6074, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unused_labels_6074", message: "Do not report errors on unused labels." },
+        Report_error_when_not_all_code_paths_in_function_return_a_value: { code: 6075, category: ts.DiagnosticCategory.Message, key: "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", message: "Report error when not all code paths in function return a value." },
+        Report_errors_for_fallthrough_cases_in_switch_statement: { code: 6076, category: ts.DiagnosticCategory.Message, key: "Report_errors_for_fallthrough_cases_in_switch_statement_6076", message: "Report errors for fallthrough cases in switch statement." },
+        Do_not_report_errors_on_unreachable_code: { code: 6077, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unreachable_code_6077", message: "Do not report errors on unreachable code." },
+        Disallow_inconsistently_cased_references_to_the_same_file: { code: 6078, category: ts.DiagnosticCategory.Message, key: "Disallow_inconsistently_cased_references_to_the_same_file_6078", message: "Disallow inconsistently-cased references to the same file." },
+        Specify_library_files_to_be_included_in_the_compilation_Colon: { code: 6079, category: ts.DiagnosticCategory.Message, key: "Specify_library_files_to_be_included_in_the_compilation_Colon_6079", message: "Specify library files to be included in the compilation: " },
+        Specify_JSX_code_generation_Colon_preserve_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_or_react_6080", message: "Specify JSX code generation: 'preserve' or 'react'" },
+        Only_amd_and_system_modules_are_supported_alongside_0: { code: 6082, category: ts.DiagnosticCategory.Error, key: "Only_amd_and_system_modules_are_supported_alongside_0_6082", message: "Only 'amd' and 'system' modules are supported alongside --{0}." },
+        Base_directory_to_resolve_non_absolute_module_names: { code: 6083, category: ts.DiagnosticCategory.Message, key: "Base_directory_to_resolve_non_absolute_module_names_6083", message: "Base directory to resolve non-absolute module names." },
+        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084", message: "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit" },
+        Enable_tracing_of_the_name_resolution_process: { code: 6085, category: ts.DiagnosticCategory.Message, key: "Enable_tracing_of_the_name_resolution_process_6085", message: "Enable tracing of the name resolution process." },
+        Resolving_module_0_from_1: { code: 6086, category: ts.DiagnosticCategory.Message, key: "Resolving_module_0_from_1_6086", message: "======== Resolving module '{0}' from '{1}'. ========" },
+        Explicitly_specified_module_resolution_kind_Colon_0: { code: 6087, category: ts.DiagnosticCategory.Message, key: "Explicitly_specified_module_resolution_kind_Colon_0_6087", message: "Explicitly specified module resolution kind: '{0}'." },
+        Module_resolution_kind_is_not_specified_using_0: { code: 6088, category: ts.DiagnosticCategory.Message, key: "Module_resolution_kind_is_not_specified_using_0_6088", message: "Module resolution kind is not specified, using '{0}'." },
+        Module_name_0_was_successfully_resolved_to_1: { code: 6089, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_successfully_resolved_to_1_6089", message: "======== Module name '{0}' was successfully resolved to '{1}'. ========" },
+        Module_name_0_was_not_resolved: { code: 6090, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_not_resolved_6090", message: "======== Module name '{0}' was not resolved. ========" },
+        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: { code: 6091, category: ts.DiagnosticCategory.Message, key: "paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0_6091", message: "'paths' option is specified, looking for a pattern to match module name '{0}'." },
+        Module_name_0_matched_pattern_1: { code: 6092, category: ts.DiagnosticCategory.Message, key: "Module_name_0_matched_pattern_1_6092", message: "Module name '{0}', matched pattern '{1}'." },
+        Trying_substitution_0_candidate_module_location_Colon_1: { code: 6093, category: ts.DiagnosticCategory.Message, key: "Trying_substitution_0_candidate_module_location_Colon_1_6093", message: "Trying substitution '{0}', candidate module location: '{1}'." },
+        Resolving_module_name_0_relative_to_base_url_1_2: { code: 6094, category: ts.DiagnosticCategory.Message, key: "Resolving_module_name_0_relative_to_base_url_1_2_6094", message: "Resolving module name '{0}' relative to base url '{1}' - '{2}'." },
+        Loading_module_as_file_Slash_folder_candidate_module_location_0: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095", message: "Loading module as file / folder, candidate module location '{0}'." },
+        File_0_does_not_exist: { code: 6096, category: ts.DiagnosticCategory.Message, key: "File_0_does_not_exist_6096", message: "File '{0}' does not exist." },
+        File_0_exist_use_it_as_a_name_resolution_result: { code: 6097, category: ts.DiagnosticCategory.Message, key: "File_0_exist_use_it_as_a_name_resolution_result_6097", message: "File '{0}' exist - use it as a name resolution result." },
+        Loading_module_0_from_node_modules_folder: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_6098", message: "Loading module '{0}' from 'node_modules' folder." },
+        Found_package_json_at_0: { code: 6099, category: ts.DiagnosticCategory.Message, key: "Found_package_json_at_0_6099", message: "Found 'package.json' at '{0}'." },
+        package_json_does_not_have_types_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_types_field_6100", message: "'package.json' does not have 'types' field." },
+        package_json_has_0_field_1_that_references_2: { code: 6101, category: ts.DiagnosticCategory.Message, key: "package_json_has_0_field_1_that_references_2_6101", message: "'package.json' has '{0}' field '{1}' that references '{2}'." },
+        Allow_javascript_files_to_be_compiled: { code: 6102, category: ts.DiagnosticCategory.Message, key: "Allow_javascript_files_to_be_compiled_6102", message: "Allow javascript files to be compiled." },
+        Option_0_should_have_array_of_strings_as_a_value: { code: 6103, category: ts.DiagnosticCategory.Error, key: "Option_0_should_have_array_of_strings_as_a_value_6103", message: "Option '{0}' should have array of strings as a value." },
+        Checking_if_0_is_the_longest_matching_prefix_for_1_2: { code: 6104, category: ts.DiagnosticCategory.Message, key: "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", message: "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'." },
+        Expected_type_of_0_field_in_package_json_to_be_string_got_1: { code: 6105, category: ts.DiagnosticCategory.Message, key: "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", message: "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'." },
+        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'" },
+        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'" },
+        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'" },
+        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'" },
+        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'" },
+        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed" },
+        Do_not_emit_use_strict_directives_in_module_output: { code: 6112, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_use_strict_directives_in_module_output_6112", message: "Do not emit 'use strict' directives in module output." },
+        Enable_strict_null_checks: { code: 6113, category: ts.DiagnosticCategory.Message, key: "Enable_strict_null_checks_6113", message: "Enable strict null checks." },
+        Unknown_option_excludes_Did_you_mean_exclude: { code: 6114, category: ts.DiagnosticCategory.Error, key: "Unknown_option_excludes_Did_you_mean_exclude_6114", message: "Unknown option 'excludes'. Did you mean 'exclude'?" },
+        Raise_error_on_this_expressions_with_an_implied_any_type: { code: 6115, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_this_expressions_with_an_implied_any_type_6115", message: "Raise error on 'this' expressions with an implied 'any' type." },
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: { code: 6116, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_2_6116", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory '{2}'. ========" },
+        Resolving_using_primary_search_paths: { code: 6117, category: ts.DiagnosticCategory.Message, key: "Resolving_using_primary_search_paths_6117", message: "Resolving using primary search paths..." },
+        Resolving_from_node_modules_folder: { code: 6118, category: ts.DiagnosticCategory.Message, key: "Resolving_from_node_modules_folder_6118", message: "Resolving from node_modules folder..." },
+        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: { code: 6119, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", message: "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========" },
+        Type_reference_directive_0_was_not_resolved: { code: 6120, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_not_resolved_6120", message: "======== Type reference directive '{0}' was not resolved. ========" },
+        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'" },
+        Root_directory_cannot_be_determined_skipping_primary_search_paths: { code: 6122, category: ts.DiagnosticCategory.Message, key: "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", message: "Root directory cannot be determined, skipping primary search paths." },
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: { code: 6123, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========" },
+        Type_declaration_files_to_be_included_in_compilation: { code: 6124, category: ts.DiagnosticCategory.Message, key: "Type_declaration_files_to_be_included_in_compilation_6124", message: "Type declaration files to be included in compilation." },
+        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'" },
+        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: { code: 6126, category: ts.DiagnosticCategory.Message, key: "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", message: "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder." },
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: { code: 6127, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", message: "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========" },
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
+        The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
+        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
+        File_name_0_has_a_1_extension_stripping_it: { code: 6132, category: ts.DiagnosticCategory.Message, key: "File_name_0_has_a_1_extension_stripping_it_6132", message: "File name '{0}' has a '{1}' extension - stripping it" },
+        Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
+        Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
+        Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
+        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: { code: 7009, category: ts.DiagnosticCategory.Error, key: "new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type_7009", message: "'new' expression, whose target lacks a construct signature, implicitly has an 'any' type." },
+        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: { code: 7010, category: ts.DiagnosticCategory.Error, key: "_0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type_7010", message: "'{0}', which lacks return-type annotation, implicitly has an '{1}' return type." },
+        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: { code: 7011, category: ts.DiagnosticCategory.Error, key: "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", message: "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type." },
+        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7013, category: ts.DiagnosticCategory.Error, key: "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", message: "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type." },
+        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: { code: 7015, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", message: "Element implicitly has an 'any' type because index expression is not of type 'number'." },
+        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation: { code: 7016, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation_7016", message: "Property '{0}' implicitly has type 'any', because its 'set' accessor lacks a type annotation." },
+        Index_signature_of_object_type_implicitly_has_an_any_type: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Index_signature_of_object_type_implicitly_has_an_any_type_7017", message: "Index signature of object type implicitly has an 'any' type." },
+        Object_literal_s_property_0_implicitly_has_an_1_type: { code: 7018, category: ts.DiagnosticCategory.Error, key: "Object_literal_s_property_0_implicitly_has_an_1_type_7018", message: "Object literal's property '{0}' implicitly has an '{1}' type." },
+        Rest_parameter_0_implicitly_has_an_any_type: { code: 7019, category: ts.DiagnosticCategory.Error, key: "Rest_parameter_0_implicitly_has_an_any_type_7019", message: "Rest parameter '{0}' implicitly has an 'any[]' type." },
+        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7020, category: ts.DiagnosticCategory.Error, key: "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", message: "Call signature, which lacks return-type annotation, implicitly has an 'any' return type." },
+        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: { code: 7022, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or__7022", message: "'{0}' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer." },
+        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7023, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", message: "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
+        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7024, category: ts.DiagnosticCategory.Error, key: "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", message: "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
+        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: { code: 7025, category: ts.DiagnosticCategory.Error, key: "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", message: "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type." },
+        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists" },
+        Unreachable_code_detected: { code: 7027, category: ts.DiagnosticCategory.Error, key: "Unreachable_code_detected_7027", message: "Unreachable code detected." },
+        Unused_label: { code: 7028, category: ts.DiagnosticCategory.Error, key: "Unused_label_7028", message: "Unused label." },
+        Fallthrough_case_in_switch: { code: 7029, category: ts.DiagnosticCategory.Error, key: "Fallthrough_case_in_switch_7029", message: "Fallthrough case in switch." },
+        Not_all_code_paths_return_a_value: { code: 7030, category: ts.DiagnosticCategory.Error, key: "Not_all_code_paths_return_a_value_7030", message: "Not all code paths return a value." },
+        Binding_element_0_implicitly_has_an_1_type: { code: 7031, category: ts.DiagnosticCategory.Error, key: "Binding_element_0_implicitly_has_an_1_type_7031", message: "Binding element '{0}' implicitly has an '{1}' type." },
+        You_cannot_rename_this_element: { code: 8000, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_this_element_8000", message: "You cannot rename this element." },
+        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: { code: 8001, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", message: "You cannot rename elements that are defined in the standard TypeScript library." },
+        import_can_only_be_used_in_a_ts_file: { code: 8002, category: ts.DiagnosticCategory.Error, key: "import_can_only_be_used_in_a_ts_file_8002", message: "'import ... =' can only be used in a .ts file." },
+        export_can_only_be_used_in_a_ts_file: { code: 8003, category: ts.DiagnosticCategory.Error, key: "export_can_only_be_used_in_a_ts_file_8003", message: "'export=' can only be used in a .ts file." },
+        type_parameter_declarations_can_only_be_used_in_a_ts_file: { code: 8004, category: ts.DiagnosticCategory.Error, key: "type_parameter_declarations_can_only_be_used_in_a_ts_file_8004", message: "'type parameter declarations' can only be used in a .ts file." },
+        implements_clauses_can_only_be_used_in_a_ts_file: { code: 8005, category: ts.DiagnosticCategory.Error, key: "implements_clauses_can_only_be_used_in_a_ts_file_8005", message: "'implements clauses' can only be used in a .ts file." },
+        interface_declarations_can_only_be_used_in_a_ts_file: { code: 8006, category: ts.DiagnosticCategory.Error, key: "interface_declarations_can_only_be_used_in_a_ts_file_8006", message: "'interface declarations' can only be used in a .ts file." },
+        module_declarations_can_only_be_used_in_a_ts_file: { code: 8007, category: ts.DiagnosticCategory.Error, key: "module_declarations_can_only_be_used_in_a_ts_file_8007", message: "'module declarations' can only be used in a .ts file." },
+        type_aliases_can_only_be_used_in_a_ts_file: { code: 8008, category: ts.DiagnosticCategory.Error, key: "type_aliases_can_only_be_used_in_a_ts_file_8008", message: "'type aliases' can only be used in a .ts file." },
+        _0_can_only_be_used_in_a_ts_file: { code: 8009, category: ts.DiagnosticCategory.Error, key: "_0_can_only_be_used_in_a_ts_file_8009", message: "'{0}' can only be used in a .ts file." },
+        types_can_only_be_used_in_a_ts_file: { code: 8010, category: ts.DiagnosticCategory.Error, key: "types_can_only_be_used_in_a_ts_file_8010", message: "'types' can only be used in a .ts file." },
+        type_arguments_can_only_be_used_in_a_ts_file: { code: 8011, category: ts.DiagnosticCategory.Error, key: "type_arguments_can_only_be_used_in_a_ts_file_8011", message: "'type arguments' can only be used in a .ts file." },
+        parameter_modifiers_can_only_be_used_in_a_ts_file: { code: 8012, category: ts.DiagnosticCategory.Error, key: "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", message: "'parameter modifiers' can only be used in a .ts file." },
+        property_declarations_can_only_be_used_in_a_ts_file: { code: 8014, category: ts.DiagnosticCategory.Error, key: "property_declarations_can_only_be_used_in_a_ts_file_8014", message: "'property declarations' can only be used in a .ts file." },
+        enum_declarations_can_only_be_used_in_a_ts_file: { code: 8015, category: ts.DiagnosticCategory.Error, key: "enum_declarations_can_only_be_used_in_a_ts_file_8015", message: "'enum declarations' can only be used in a .ts file." },
+        type_assertion_expressions_can_only_be_used_in_a_ts_file: { code: 8016, category: ts.DiagnosticCategory.Error, key: "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", message: "'type assertion expressions' can only be used in a .ts file." },
+        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses." },
+        class_expressions_are_not_currently_supported: { code: 9003, category: ts.DiagnosticCategory.Error, key: "class_expressions_are_not_currently_supported_9003", message: "'class' expressions are not currently supported." },
+        JSX_attributes_must_only_be_assigned_a_non_empty_expression: { code: 17000, category: ts.DiagnosticCategory.Error, key: "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", message: "JSX attributes must only be assigned a non-empty 'expression'." },
+        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: { code: 17001, category: ts.DiagnosticCategory.Error, key: "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", message: "JSX elements cannot have multiple attributes with the same name." },
+        Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: ts.DiagnosticCategory.Error, key: "Expected_corresponding_JSX_closing_tag_for_0_17002", message: "Expected corresponding JSX closing tag for '{0}'." },
+        JSX_attribute_expected: { code: 17003, category: ts.DiagnosticCategory.Error, key: "JSX_attribute_expected_17003", message: "JSX attribute expected." },
+        Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: ts.DiagnosticCategory.Error, key: "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", message: "Cannot use JSX unless the '--jsx' flag is provided." },
+        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'" },
+        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17006, category: ts.DiagnosticCategory.Error, key: "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", message: "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
+        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17007, category: ts.DiagnosticCategory.Error, key: "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", message: "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
+        JSX_element_0_has_no_corresponding_closing_tag: { code: 17008, category: ts.DiagnosticCategory.Error, key: "JSX_element_0_has_no_corresponding_closing_tag_17008", message: "JSX element '{0}' has no corresponding closing tag." },
+        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: { code: 17009, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", message: "'super' must be called before accessing 'this' in the constructor of a derived class." },
+        Unknown_typing_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_typing_option_0_17010", message: "Unknown typing option '{0}'." }
+    };
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function tokenIsIdentifierOrKeyword(token) {
+        return token >= 69;
+    }
+    ts.tokenIsIdentifierOrKeyword = tokenIsIdentifierOrKeyword;
+    var textToToken = {
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+        "&=": 66,
+        "|=": 67,
+        "^=": 68,
+        "@": 55
+    };
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+    var unicodeES5IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389, 6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688, 6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141, 7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015, 43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259, 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520, 43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695, 43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739, 43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    var unicodeES5IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520, 1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788, 1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112, 2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423, 2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929, 2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424, 3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272, 6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    function lookupInUnicodeMap(code, map) {
+        if (code < map[0]) {
+            return false;
+        }
+        var lo = 0;
+        var hi = map.length;
+        var mid;
+        while (lo + 1 < hi) {
+            mid = lo + (hi - lo) / 2;
+            mid -= mid % 2;
+            if (map[mid] <= code && code <= map[mid + 1]) {
+                return true;
+            }
+            if (code < map[mid]) {
+                hi = mid;
+            }
+            else {
+                lo = mid + 2;
+            }
+        }
+        return false;
+    }
+    function isUnicodeIdentifierStart(code, languageVersion) {
+        return languageVersion >= 1 ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
+    }
+    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
+    function isUnicodeIdentifierPart(code, languageVersion) {
+        return languageVersion >= 1 ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
+    }
+    function makeReverseMap(source) {
+        var result = [];
+        for (var name_4 in source) {
+            if (source.hasOwnProperty(name_4)) {
+                result[source[name_4]] = name_4;
+            }
+        }
+        return result;
+    }
+    var tokenStrings = makeReverseMap(textToToken);
+    function tokenToString(t) {
+        return tokenStrings[t];
+    }
+    ts.tokenToString = tokenToString;
+    function stringToToken(s) {
+        return textToToken[s];
+    }
+    ts.stringToToken = stringToToken;
+    function computeLineStarts(text) {
+        var result = new Array();
+        var pos = 0;
+        var lineStart = 0;
+        while (pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 13:
+                    if (text.charCodeAt(pos) === 10) {
+                        pos++;
+                    }
+                case 10:
+                    result.push(lineStart);
+                    lineStart = pos;
+                    break;
+                default:
+                    if (ch > 127 && isLineBreak(ch)) {
+                        result.push(lineStart);
+                        lineStart = pos;
+                    }
+                    break;
+            }
+        }
+        result.push(lineStart);
+        return result;
+    }
+    ts.computeLineStarts = computeLineStarts;
+    function getPositionOfLineAndCharacter(sourceFile, line, character) {
+        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
+    }
+    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
+    function computePositionOfLineAndCharacter(lineStarts, line, character) {
+        ts.Debug.assert(line >= 0 && line < lineStarts.length);
+        return lineStarts[line] + character;
+    }
+    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
+    function getLineStarts(sourceFile) {
+        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
+    }
+    ts.getLineStarts = getLineStarts;
+    function computeLineAndCharacterOfPosition(lineStarts, position) {
+        var lineNumber = ts.binarySearch(lineStarts, position);
+        if (lineNumber < 0) {
+            lineNumber = ~lineNumber - 1;
+            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
+        }
+        return {
+            line: lineNumber,
+            character: position - lineStarts[lineNumber]
+        };
+    }
+    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
+    function getLineAndCharacterOfPosition(sourceFile, position) {
+        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
+    }
+    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
+    var hasOwnProperty = Object.prototype.hasOwnProperty;
+    function isWhiteSpace(ch) {
+        return ch === 32 ||
+            ch === 9 ||
+            ch === 11 ||
+            ch === 12 ||
+            ch === 160 ||
+            ch === 133 ||
+            ch === 5760 ||
+            ch >= 8192 && ch <= 8203 ||
+            ch === 8239 ||
+            ch === 8287 ||
+            ch === 12288 ||
+            ch === 65279;
+    }
+    ts.isWhiteSpace = isWhiteSpace;
+    function isLineBreak(ch) {
+        return ch === 10 ||
+            ch === 13 ||
+            ch === 8232 ||
+            ch === 8233;
+    }
+    ts.isLineBreak = isLineBreak;
+    function isDigit(ch) {
+        return ch >= 48 && ch <= 57;
+    }
+    function isOctalDigit(ch) {
+        return ch >= 48 && ch <= 55;
+    }
+    ts.isOctalDigit = isOctalDigit;
+    function couldStartTrivia(text, pos) {
+        var ch = text.charCodeAt(pos);
+        switch (ch) {
+            case 13:
+            case 10:
+            case 9:
+            case 11:
+            case 12:
+            case 32:
+            case 47:
+            case 60:
+            case 61:
+            case 62:
+                return true;
+            case 35:
+                return pos === 0;
+            default:
+                return ch > 127;
+        }
+    }
+    ts.couldStartTrivia = couldStartTrivia;
+    function skipTrivia(text, pos, stopAfterLineBreak, stopAtComments) {
+        if (stopAtComments === void 0) { stopAtComments = false; }
+        if (!(pos >= 0)) {
+            return pos;
+        }
+        while (true) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13:
+                    if (text.charCodeAt(pos + 1) === 10) {
+                        pos++;
+                    }
+                case 10:
+                    pos++;
+                    if (stopAfterLineBreak) {
+                        return pos;
+                    }
+                    continue;
+                case 9:
+                case 11:
+                case 12:
+                case 32:
+                    pos++;
+                    continue;
+                case 47:
+                    if (stopAtComments) {
+                        break;
+                    }
+                    if (text.charCodeAt(pos + 1) === 47) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (isLineBreak(text.charCodeAt(pos))) {
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    if (text.charCodeAt(pos + 1) === 42) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
+                                pos += 2;
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    break;
+                case 60:
+                case 61:
+                case 62:
+                    if (isConflictMarkerTrivia(text, pos)) {
+                        pos = scanConflictMarkerTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                case 35:
+                    if (pos === 0 && isShebangTrivia(text, pos)) {
+                        pos = scanShebangTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                default:
+                    if (ch > 127 && (isWhiteSpace(ch) || isLineBreak(ch))) {
+                        pos++;
+                        continue;
+                    }
+                    break;
+            }
+            return pos;
+        }
+    }
+    ts.skipTrivia = skipTrivia;
+    var mergeConflictMarkerLength = "<<<<<<<".length;
+    function isConflictMarkerTrivia(text, pos) {
+        ts.Debug.assert(pos >= 0);
+        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
+            var ch = text.charCodeAt(pos);
+            if ((pos + mergeConflictMarkerLength) < text.length) {
+                for (var i = 0, n = mergeConflictMarkerLength; i < n; i++) {
+                    if (text.charCodeAt(pos + i) !== ch) {
+                        return false;
+                    }
+                }
+                return ch === 61 ||
+                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32;
+            }
+        }
+        return false;
+    }
+    function scanConflictMarkerTrivia(text, pos, error) {
+        if (error) {
+            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
+        }
+        var ch = text.charCodeAt(pos);
+        var len = text.length;
+        if (ch === 60 || ch === 62) {
+            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
+                pos++;
+            }
+        }
+        else {
+            ts.Debug.assert(ch === 61);
+            while (pos < len) {
+                var ch_1 = text.charCodeAt(pos);
+                if (ch_1 === 62 && isConflictMarkerTrivia(text, pos)) {
+                    break;
+                }
+                pos++;
+            }
+        }
+        return pos;
+    }
+    var shebangTriviaRegex = /^#!.*/;
+    function isShebangTrivia(text, pos) {
+        ts.Debug.assert(pos === 0);
+        return shebangTriviaRegex.test(text);
+    }
+    function scanShebangTrivia(text, pos) {
+        var shebang = shebangTriviaRegex.exec(text)[0];
+        pos = pos + shebang.length;
+        return pos;
+    }
+    function getCommentRanges(text, pos, trailing) {
+        var result;
+        var collecting = trailing || pos === 0;
+        while (pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13:
+                    if (text.charCodeAt(pos + 1) === 10) {
+                        pos++;
+                    }
+                case 10:
+                    pos++;
+                    if (trailing) {
+                        return result;
+                    }
+                    collecting = true;
+                    if (result && result.length) {
+                        ts.lastOrUndefined(result).hasTrailingNewLine = true;
+                    }
+                    continue;
+                case 9:
+                case 11:
+                case 12:
+                case 32:
+                    pos++;
+                    continue;
+                case 47:
+                    var nextChar = text.charCodeAt(pos + 1);
+                    var hasTrailingNewLine = false;
+                    if (nextChar === 47 || nextChar === 42) {
+                        var kind = nextChar === 47 ? 2 : 3;
+                        var startPos = pos;
+                        pos += 2;
+                        if (nextChar === 47) {
+                            while (pos < text.length) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    hasTrailingNewLine = true;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        else {
+                            while (pos < text.length) {
+                                if (text.charCodeAt(pos) === 42 && text.charCodeAt(pos + 1) === 47) {
+                                    pos += 2;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        if (collecting) {
+                            if (!result) {
+                                result = [];
+                            }
+                            result.push({ pos: startPos, end: pos, hasTrailingNewLine: hasTrailingNewLine, kind: kind });
+                        }
+                        continue;
+                    }
+                    break;
+                default:
+                    if (ch > 127 && (isWhiteSpace(ch) || isLineBreak(ch))) {
+                        if (result && result.length && isLineBreak(ch)) {
+                            ts.lastOrUndefined(result).hasTrailingNewLine = true;
+                        }
+                        pos++;
+                        continue;
+                    }
+                    break;
+            }
+            return result;
+        }
+        return result;
+    }
+    function getLeadingCommentRanges(text, pos) {
+        return getCommentRanges(text, pos, false);
+    }
+    ts.getLeadingCommentRanges = getLeadingCommentRanges;
+    function getTrailingCommentRanges(text, pos) {
+        return getCommentRanges(text, pos, true);
+    }
+    ts.getTrailingCommentRanges = getTrailingCommentRanges;
+    function getShebang(text) {
+        return shebangTriviaRegex.test(text)
+            ? shebangTriviaRegex.exec(text)[0]
+            : undefined;
+    }
+    ts.getShebang = getShebang;
+    function isIdentifierStart(ch, languageVersion) {
+        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
+            ch === 36 || ch === 95 ||
+            ch > 127 && isUnicodeIdentifierStart(ch, languageVersion);
+    }
+    ts.isIdentifierStart = isIdentifierStart;
+    function isIdentifierPart(ch, languageVersion) {
+        return ch >= 65 && ch <= 90 || ch >= 97 && ch <= 122 ||
+            ch >= 48 && ch <= 57 || ch === 36 || ch === 95 ||
+            ch > 127 && isUnicodeIdentifierPart(ch, languageVersion);
+    }
+    ts.isIdentifierPart = isIdentifierPart;
+    function isIdentifier(name, languageVersion) {
+        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
+            return false;
+        }
+        for (var i = 1, n = name.length; i < n; i++) {
+            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.isIdentifier = isIdentifier;
+    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
+        if (languageVariant === void 0) { languageVariant = 0; }
+        var pos;
+        var end;
+        var startPos;
+        var tokenPos;
+        var token;
+        var tokenValue;
+        var precedingLineBreak;
+        var hasExtendedUnicodeEscape;
+        var tokenIsUnterminated;
+        setText(text, start, length);
+        return {
+            getStartPos: function () { return startPos; },
+            getTextPos: function () { return pos; },
+            getToken: function () { return token; },
+            getTokenPos: function () { return tokenPos; },
+            getTokenText: function () { return text.substring(tokenPos, pos); },
+            getTokenValue: function () { return tokenValue; },
+            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
+            hasPrecedingLineBreak: function () { return precedingLineBreak; },
+            isIdentifier: function () { return token === 69 || token > 105; },
+            isReservedWord: function () { return token >= 70 && token <= 105; },
+            isUnterminated: function () { return tokenIsUnterminated; },
+            reScanGreaterToken: reScanGreaterToken,
+            reScanSlashToken: reScanSlashToken,
+            reScanTemplateToken: reScanTemplateToken,
+            scanJsxIdentifier: scanJsxIdentifier,
+            reScanJsxToken: reScanJsxToken,
+            scanJsxToken: scanJsxToken,
+            scanJSDocToken: scanJSDocToken,
+            scan: scan,
+            setText: setText,
+            setScriptTarget: setScriptTarget,
+            setLanguageVariant: setLanguageVariant,
+            setOnError: setOnError,
+            setTextPos: setTextPos,
+            tryScan: tryScan,
+            lookAhead: lookAhead,
+            scanRange: scanRange
+        };
+        function error(message, length) {
+            if (onError) {
+                onError(message, length || 0);
+            }
+        }
+        function scanNumber() {
+            var start = pos;
+            while (isDigit(text.charCodeAt(pos)))
+                pos++;
+            if (text.charCodeAt(pos) === 46) {
+                pos++;
+                while (isDigit(text.charCodeAt(pos)))
+                    pos++;
+            }
+            var end = pos;
+            if (text.charCodeAt(pos) === 69 || text.charCodeAt(pos) === 101) {
+                pos++;
+                if (text.charCodeAt(pos) === 43 || text.charCodeAt(pos) === 45)
+                    pos++;
+                if (isDigit(text.charCodeAt(pos))) {
+                    pos++;
+                    while (isDigit(text.charCodeAt(pos)))
+                        pos++;
+                    end = pos;
+                }
+                else {
+                    error(ts.Diagnostics.Digit_expected);
+                }
+            }
+            return "" + +(text.substring(start, end));
+        }
+        function scanOctalDigits() {
+            var start = pos;
+            while (isOctalDigit(text.charCodeAt(pos))) {
+                pos++;
+            }
+            return +(text.substring(start, pos));
+        }
+        function scanExactNumberOfHexDigits(count) {
+            return scanHexDigits(count, false);
+        }
+        function scanMinimumNumberOfHexDigits(count) {
+            return scanHexDigits(count, true);
+        }
+        function scanHexDigits(minCount, scanAsManyAsPossible) {
+            var digits = 0;
+            var value = 0;
+            while (digits < minCount || scanAsManyAsPossible) {
+                var ch = text.charCodeAt(pos);
+                if (ch >= 48 && ch <= 57) {
+                    value = value * 16 + ch - 48;
+                }
+                else if (ch >= 65 && ch <= 70) {
+                    value = value * 16 + ch - 65 + 10;
+                }
+                else if (ch >= 97 && ch <= 102) {
+                    value = value * 16 + ch - 97 + 10;
+                }
+                else {
+                    break;
+                }
+                pos++;
+                digits++;
+            }
+            if (digits < minCount) {
+                value = -1;
+            }
+            return value;
+        }
+        function scanString() {
+            var quote = text.charCodeAt(pos);
+            pos++;
+            var result = "";
+            var start = pos;
+            while (true) {
+                if (pos >= end) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                var ch = text.charCodeAt(pos);
+                if (ch === quote) {
+                    result += text.substring(start, pos);
+                    pos++;
+                    break;
+                }
+                if (ch === 92) {
+                    result += text.substring(start, pos);
+                    result += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                if (isLineBreak(ch)) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                pos++;
+            }
+            return result;
+        }
+        function scanTemplateAndSetTokenValue() {
+            var startedWithBacktick = text.charCodeAt(pos) === 96;
+            pos++;
+            var start = pos;
+            var contents = "";
+            var resultingToken;
+            while (true) {
+                if (pos >= end) {
+                    contents += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_template_literal);
+                    resultingToken = startedWithBacktick ? 11 : 14;
+                    break;
+                }
+                var currChar = text.charCodeAt(pos);
+                if (currChar === 96) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    resultingToken = startedWithBacktick ? 11 : 14;
+                    break;
+                }
+                if (currChar === 36 && pos + 1 < end && text.charCodeAt(pos + 1) === 123) {
+                    contents += text.substring(start, pos);
+                    pos += 2;
+                    resultingToken = startedWithBacktick ? 12 : 13;
+                    break;
+                }
+                if (currChar === 92) {
+                    contents += text.substring(start, pos);
+                    contents += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                if (currChar === 13) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    if (pos < end && text.charCodeAt(pos) === 10) {
+                        pos++;
+                    }
+                    contents += "\n";
+                    start = pos;
+                    continue;
+                }
+                pos++;
+            }
+            ts.Debug.assert(resultingToken !== undefined);
+            tokenValue = contents;
+            return resultingToken;
+        }
+        function scanEscapeSequence() {
+            pos++;
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                return "";
+            }
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 48:
+                    return "\0";
+                case 98:
+                    return "\b";
+                case 116:
+                    return "\t";
+                case 110:
+                    return "\n";
+                case 118:
+                    return "\v";
+                case 102:
+                    return "\f";
+                case 114:
+                    return "\r";
+                case 39:
+                    return "\'";
+                case 34:
+                    return "\"";
+                case 117:
+                    if (pos < end && text.charCodeAt(pos) === 123) {
+                        hasExtendedUnicodeEscape = true;
+                        pos++;
+                        return scanExtendedUnicodeEscape();
+                    }
+                    return scanHexadecimalEscape(4);
+                case 120:
+                    return scanHexadecimalEscape(2);
+                case 13:
+                    if (pos < end && text.charCodeAt(pos) === 10) {
+                        pos++;
+                    }
+                case 10:
+                case 8232:
+                case 8233:
+                    return "";
+                default:
+                    return String.fromCharCode(ch);
+            }
+        }
+        function scanHexadecimalEscape(numDigits) {
+            var escapedValue = scanExactNumberOfHexDigits(numDigits);
+            if (escapedValue >= 0) {
+                return String.fromCharCode(escapedValue);
+            }
+            else {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                return "";
+            }
+        }
+        function scanExtendedUnicodeEscape() {
+            var escapedValue = scanMinimumNumberOfHexDigits(1);
+            var isInvalidExtendedEscape = false;
+            if (escapedValue < 0) {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                isInvalidExtendedEscape = true;
+            }
+            else if (escapedValue > 0x10FFFF) {
+                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
+                isInvalidExtendedEscape = true;
+            }
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                isInvalidExtendedEscape = true;
+            }
+            else if (text.charCodeAt(pos) === 125) {
+                pos++;
+            }
+            else {
+                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
+                isInvalidExtendedEscape = true;
+            }
+            if (isInvalidExtendedEscape) {
+                return "";
+            }
+            return utf16EncodeAsString(escapedValue);
+        }
+        function utf16EncodeAsString(codePoint) {
+            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
+            if (codePoint <= 65535) {
+                return String.fromCharCode(codePoint);
+            }
+            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
+            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
+            return String.fromCharCode(codeUnit1, codeUnit2);
+        }
+        function peekUnicodeEscape() {
+            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117) {
+                var start_1 = pos;
+                pos += 2;
+                var value = scanExactNumberOfHexDigits(4);
+                pos = start_1;
+                return value;
+            }
+            return -1;
+        }
+        function scanIdentifierParts() {
+            var result = "";
+            var start = pos;
+            while (pos < end) {
+                var ch = text.charCodeAt(pos);
+                if (isIdentifierPart(ch, languageVersion)) {
+                    pos++;
+                }
+                else if (ch === 92) {
+                    ch = peekUnicodeEscape();
+                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
+                        break;
+                    }
+                    result += text.substring(start, pos);
+                    result += String.fromCharCode(ch);
+                    pos += 6;
+                    start = pos;
+                }
+                else {
+                    break;
+                }
+            }
+            result += text.substring(start, pos);
+            return result;
+        }
+        function getIdentifierToken() {
+            var len = tokenValue.length;
+            if (len >= 2 && len <= 11) {
+                var ch = tokenValue.charCodeAt(0);
+                if (ch >= 97 && ch <= 122 && hasOwnProperty.call(textToToken, tokenValue)) {
+                    return token = textToToken[tokenValue];
+                }
+            }
+            return token = 69;
+        }
+        function scanBinaryOrOctalDigits(base) {
+            ts.Debug.assert(base !== 2 || base !== 8, "Expected either base 2 or base 8");
+            var value = 0;
+            var numberOfDigits = 0;
+            while (true) {
+                var ch = text.charCodeAt(pos);
+                var valueOfCh = ch - 48;
+                if (!isDigit(ch) || valueOfCh >= base) {
+                    break;
+                }
+                value = value * base + valueOfCh;
+                pos++;
+                numberOfDigits++;
+            }
+            if (numberOfDigits === 0) {
+                return -1;
+            }
+            return value;
+        }
+        function scan() {
+            startPos = pos;
+            hasExtendedUnicodeEscape = false;
+            precedingLineBreak = false;
+            tokenIsUnterminated = false;
+            while (true) {
+                tokenPos = pos;
+                if (pos >= end) {
+                    return token = 1;
+                }
+                var ch = text.charCodeAt(pos);
+                if (ch === 35 && pos === 0 && isShebangTrivia(text, pos)) {
+                    pos = scanShebangTrivia(text, pos);
+                    if (skipTrivia) {
+                        continue;
+                    }
+                    else {
+                        return token = 6;
+                    }
+                }
+                switch (ch) {
+                    case 10:
+                    case 13:
+                        precedingLineBreak = true;
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            if (ch === 13 && pos + 1 < end && text.charCodeAt(pos + 1) === 10) {
+                                pos += 2;
+                            }
+                            else {
+                                pos++;
+                            }
+                            return token = 4;
+                        }
+                    case 9:
+                    case 11:
+                    case 12:
+                    case 32:
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            while (pos < end && isWhiteSpace(text.charCodeAt(pos))) {
+                                pos++;
+                            }
+                            return token = 5;
+                        }
+                    case 33:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 33;
+                            }
+                            return pos += 2, token = 31;
+                        }
+                        pos++;
+                        return token = 49;
+                    case 34:
+                    case 39:
+                        tokenValue = scanString();
+                        return token = 9;
+                    case 96:
+                        return token = scanTemplateAndSetTokenValue();
+                    case 37:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 62;
+                        }
+                        pos++;
+                        return token = 40;
+                    case 38:
+                        if (text.charCodeAt(pos + 1) === 38) {
+                            return pos += 2, token = 51;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 66;
+                        }
+                        pos++;
+                        return token = 46;
+                    case 40:
+                        pos++;
+                        return token = 17;
+                    case 41:
+                        pos++;
+                        return token = 18;
+                    case 42:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 59;
+                        }
+                        if (text.charCodeAt(pos + 1) === 42) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 60;
+                            }
+                            return pos += 2, token = 38;
+                        }
+                        pos++;
+                        return token = 37;
+                    case 43:
+                        if (text.charCodeAt(pos + 1) === 43) {
+                            return pos += 2, token = 41;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 57;
+                        }
+                        pos++;
+                        return token = 35;
+                    case 44:
+                        pos++;
+                        return token = 24;
+                    case 45:
+                        if (text.charCodeAt(pos + 1) === 45) {
+                            return pos += 2, token = 42;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 58;
+                        }
+                        pos++;
+                        return token = 36;
+                    case 46:
+                        if (isDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = scanNumber();
+                            return token = 8;
+                        }
+                        if (text.charCodeAt(pos + 1) === 46 && text.charCodeAt(pos + 2) === 46) {
+                            return pos += 3, token = 22;
+                        }
+                        pos++;
+                        return token = 21;
+                    case 47:
+                        if (text.charCodeAt(pos + 1) === 47) {
+                            pos += 2;
+                            while (pos < end) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    break;
+                                }
+                                pos++;
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 2;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 42) {
+                            pos += 2;
+                            var commentClosed = false;
+                            while (pos < end) {
+                                var ch_2 = text.charCodeAt(pos);
+                                if (ch_2 === 42 && text.charCodeAt(pos + 1) === 47) {
+                                    pos += 2;
+                                    commentClosed = true;
+                                    break;
+                                }
+                                if (isLineBreak(ch_2)) {
+                                    precedingLineBreak = true;
+                                }
+                                pos++;
+                            }
+                            if (!commentClosed) {
+                                error(ts.Diagnostics.Asterisk_Slash_expected);
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                tokenIsUnterminated = !commentClosed;
+                                return token = 3;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 61;
+                        }
+                        pos++;
+                        return token = 39;
+                    case 48:
+                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 || text.charCodeAt(pos + 1) === 120)) {
+                            pos += 2;
+                            var value = scanMinimumNumberOfHexDigits(1);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 || text.charCodeAt(pos + 1) === 98)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(2);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Binary_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 || text.charCodeAt(pos + 1) === 111)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(8);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Octal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8;
+                        }
+                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = "" + scanOctalDigits();
+                            return token = 8;
+                        }
+                    case 49:
+                    case 50:
+                    case 51:
+                    case 52:
+                    case 53:
+                    case 54:
+                    case 55:
+                    case 56:
+                    case 57:
+                        tokenValue = scanNumber();
+                        return token = 8;
+                    case 58:
+                        pos++;
+                        return token = 54;
+                    case 59:
+                        pos++;
+                        return token = 23;
+                    case 60:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 60) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 63;
+                            }
+                            return pos += 2, token = 43;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 28;
+                        }
+                        if (languageVariant === 1 &&
+                            text.charCodeAt(pos + 1) === 47 &&
+                            text.charCodeAt(pos + 2) !== 42) {
+                            return pos += 2, token = 26;
+                        }
+                        pos++;
+                        return token = 25;
+                    case 61:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            if (text.charCodeAt(pos + 2) === 61) {
+                                return pos += 3, token = 32;
+                            }
+                            return pos += 2, token = 30;
+                        }
+                        if (text.charCodeAt(pos + 1) === 62) {
+                            return pos += 2, token = 34;
+                        }
+                        pos++;
+                        return token = 56;
+                    case 62:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7;
+                            }
+                        }
+                        pos++;
+                        return token = 27;
+                    case 63:
+                        pos++;
+                        return token = 53;
+                    case 91:
+                        pos++;
+                        return token = 19;
+                    case 93:
+                        pos++;
+                        return token = 20;
+                    case 94:
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 68;
+                        }
+                        pos++;
+                        return token = 48;
+                    case 123:
+                        pos++;
+                        return token = 15;
+                    case 124:
+                        if (text.charCodeAt(pos + 1) === 124) {
+                            return pos += 2, token = 52;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61) {
+                            return pos += 2, token = 67;
+                        }
+                        pos++;
+                        return token = 47;
+                    case 125:
+                        pos++;
+                        return token = 16;
+                    case 126:
+                        pos++;
+                        return token = 50;
+                    case 64:
+                        pos++;
+                        return token = 55;
+                    case 92:
+                        var cookedChar = peekUnicodeEscape();
+                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
+                            pos += 6;
+                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
+                            return token = getIdentifierToken();
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0;
+                    default:
+                        if (isIdentifierStart(ch, languageVersion)) {
+                            pos++;
+                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
+                                pos++;
+                            tokenValue = text.substring(tokenPos, pos);
+                            if (ch === 92) {
+                                tokenValue += scanIdentifierParts();
+                            }
+                            return token = getIdentifierToken();
+                        }
+                        else if (isWhiteSpace(ch)) {
+                            pos++;
+                            continue;
+                        }
+                        else if (isLineBreak(ch)) {
+                            precedingLineBreak = true;
+                            pos++;
+                            continue;
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0;
+                }
+            }
+        }
+        function reScanGreaterToken() {
+            if (token === 27) {
+                if (text.charCodeAt(pos) === 62) {
+                    if (text.charCodeAt(pos + 1) === 62) {
+                        if (text.charCodeAt(pos + 2) === 61) {
+                            return pos += 3, token = 65;
+                        }
+                        return pos += 2, token = 45;
+                    }
+                    if (text.charCodeAt(pos + 1) === 61) {
+                        return pos += 2, token = 64;
+                    }
+                    pos++;
+                    return token = 44;
+                }
+                if (text.charCodeAt(pos) === 61) {
+                    pos++;
+                    return token = 29;
+                }
+            }
+            return token;
+        }
+        function reScanSlashToken() {
+            if (token === 39 || token === 61) {
+                var p = tokenPos + 1;
+                var inEscape = false;
+                var inCharacterClass = false;
+                while (true) {
+                    if (p >= end) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    var ch = text.charCodeAt(p);
+                    if (isLineBreak(ch)) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    if (inEscape) {
+                        inEscape = false;
+                    }
+                    else if (ch === 47 && !inCharacterClass) {
+                        p++;
+                        break;
+                    }
+                    else if (ch === 91) {
+                        inCharacterClass = true;
+                    }
+                    else if (ch === 92) {
+                        inEscape = true;
+                    }
+                    else if (ch === 93) {
+                        inCharacterClass = false;
+                    }
+                    p++;
+                }
+                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
+                    p++;
+                }
+                pos = p;
+                tokenValue = text.substring(tokenPos, pos);
+                token = 10;
+            }
+            return token;
+        }
+        function reScanTemplateToken() {
+            ts.Debug.assert(token === 16, "'reScanTemplateToken' should only be called on a '}'");
+            pos = tokenPos;
+            return token = scanTemplateAndSetTokenValue();
+        }
+        function reScanJsxToken() {
+            pos = tokenPos = startPos;
+            return token = scanJsxToken();
+        }
+        function scanJsxToken() {
+            startPos = tokenPos = pos;
+            if (pos >= end) {
+                return token = 1;
+            }
+            var char = text.charCodeAt(pos);
+            if (char === 60) {
+                if (text.charCodeAt(pos + 1) === 47) {
+                    pos += 2;
+                    return token = 26;
+                }
+                pos++;
+                return token = 25;
+            }
+            if (char === 123) {
+                pos++;
+                return token = 15;
+            }
+            while (pos < end) {
+                pos++;
+                char = text.charCodeAt(pos);
+                if ((char === 123) || (char === 60)) {
+                    break;
+                }
+            }
+            return token = 244;
+        }
+        function scanJsxIdentifier() {
+            if (tokenIsIdentifierOrKeyword(token)) {
+                var firstCharPosition = pos;
+                while (pos < end) {
+                    var ch = text.charCodeAt(pos);
+                    if (ch === 45 || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
+                        pos++;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
+            }
+            return token;
+        }
+        function scanJSDocToken() {
+            if (pos >= end) {
+                return token = 1;
+            }
+            startPos = pos;
+            var ch = text.charCodeAt(pos);
+            while (pos < end) {
+                ch = text.charCodeAt(pos);
+                if (isWhiteSpace(ch)) {
+                    pos++;
+                }
+                else {
+                    break;
+                }
+            }
+            tokenPos = pos;
+            switch (ch) {
+                case 64:
+                    return pos += 1, token = 55;
+                case 10:
+                case 13:
+                    return pos += 1, token = 4;
+                case 42:
+                    return pos += 1, token = 37;
+                case 123:
+                    return pos += 1, token = 15;
+                case 125:
+                    return pos += 1, token = 16;
+                case 91:
+                    return pos += 1, token = 19;
+                case 93:
+                    return pos += 1, token = 20;
+                case 61:
+                    return pos += 1, token = 56;
+                case 44:
+                    return pos += 1, token = 24;
+            }
+            if (isIdentifierStart(ch, 2)) {
+                pos++;
+                while (isIdentifierPart(text.charCodeAt(pos), 2) && pos < end) {
+                    pos++;
+                }
+                return token = 69;
+            }
+            else {
+                return pos += 1, token = 0;
+            }
+        }
+        function speculationHelper(callback, isLookahead) {
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var saveTokenValue = tokenValue;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var result = callback();
+            if (!result || isLookahead) {
+                pos = savePos;
+                startPos = saveStartPos;
+                tokenPos = saveTokenPos;
+                token = saveToken;
+                tokenValue = saveTokenValue;
+                precedingLineBreak = savePrecedingLineBreak;
+            }
+            return result;
+        }
+        function scanRange(start, length, callback) {
+            var saveEnd = end;
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var saveTokenValue = tokenValue;
+            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
+            var saveTokenIsUnterminated = tokenIsUnterminated;
+            setText(text, start, length);
+            var result = callback();
+            end = saveEnd;
+            pos = savePos;
+            startPos = saveStartPos;
+            tokenPos = saveTokenPos;
+            token = saveToken;
+            precedingLineBreak = savePrecedingLineBreak;
+            tokenValue = saveTokenValue;
+            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
+            tokenIsUnterminated = saveTokenIsUnterminated;
+            return result;
+        }
+        function lookAhead(callback) {
+            return speculationHelper(callback, true);
+        }
+        function tryScan(callback) {
+            return speculationHelper(callback, false);
+        }
+        function setText(newText, start, length) {
+            text = newText || "";
+            end = length === undefined ? text.length : start + length;
+            setTextPos(start || 0);
+        }
+        function setOnError(errorCallback) {
+            onError = errorCallback;
+        }
+        function setScriptTarget(scriptTarget) {
+            languageVersion = scriptTarget;
+        }
+        function setLanguageVariant(variant) {
+            languageVariant = variant;
+        }
+        function setTextPos(textPos) {
+            ts.Debug.assert(textPos >= 0);
+            pos = textPos;
+            startPos = textPos;
+            tokenPos = textPos;
+            token = 0;
+            precedingLineBreak = false;
+            tokenValue = undefined;
+            hasExtendedUnicodeEscape = false;
+            tokenIsUnterminated = false;
+        }
+    }
+    ts.createScanner = createScanner;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.optionDeclarations = [
+        {
+            name: "charset",
+            type: "string"
+        },
+        {
+            name: "declaration",
+            shortName: "d",
+            type: "boolean",
+            description: ts.Diagnostics.Generates_corresponding_d_ts_file
+        },
+        {
+            name: "declarationDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "diagnostics",
+            type: "boolean"
+        },
+        {
+            name: "emitBOM",
+            type: "boolean"
+        },
+        {
+            name: "help",
+            shortName: "h",
+            type: "boolean",
+            description: ts.Diagnostics.Print_this_message
+        },
+        {
+            name: "help",
+            shortName: "?",
+            type: "boolean"
+        },
+        {
+            name: "init",
+            type: "boolean",
+            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file
+        },
+        {
+            name: "inlineSourceMap",
+            type: "boolean"
+        },
+        {
+            name: "inlineSources",
+            type: "boolean"
+        },
+        {
+            name: "jsx",
+            type: {
+                "preserve": 1,
+                "react": 2
+            },
+            paramType: ts.Diagnostics.KIND,
+            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_or_react
+        },
+        {
+            name: "reactNamespace",
+            type: "string",
+            description: ts.Diagnostics.Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit
+        },
+        {
+            name: "listFiles",
+            type: "boolean"
+        },
+        {
+            name: "locale",
+            type: "string"
+        },
+        {
+            name: "mapRoot",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
+            paramType: ts.Diagnostics.LOCATION
+        },
+        {
+            name: "module",
+            shortName: "m",
+            type: {
+                "none": ts.ModuleKind.None,
+                "commonjs": ts.ModuleKind.CommonJS,
+                "amd": ts.ModuleKind.AMD,
+                "system": ts.ModuleKind.System,
+                "umd": ts.ModuleKind.UMD,
+                "es6": ts.ModuleKind.ES6,
+                "es2015": ts.ModuleKind.ES2015
+            },
+            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
+            paramType: ts.Diagnostics.KIND
+        },
+        {
+            name: "newLine",
+            type: {
+                "crlf": 0,
+                "lf": 1
+            },
+            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
+            paramType: ts.Diagnostics.NEWLINE
+        },
+        {
+            name: "noEmit",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_outputs
+        },
+        {
+            name: "noEmitHelpers",
+            type: "boolean"
+        },
+        {
+            name: "noEmitOnError",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported
+        },
+        {
+            name: "noImplicitAny",
+            type: "boolean",
+            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type
+        },
+        {
+            name: "noImplicitThis",
+            type: "boolean",
+            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type
+        },
+        {
+            name: "noLib",
+            type: "boolean"
+        },
+        {
+            name: "noResolve",
+            type: "boolean"
+        },
+        {
+            name: "skipDefaultLibCheck",
+            type: "boolean"
+        },
+        {
+            name: "skipLibCheck",
+            type: "boolean",
+            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
+        },
+        {
+            name: "out",
+            type: "string",
+            isFilePath: false,
+            paramType: ts.Diagnostics.FILE
+        },
+        {
+            name: "outFile",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
+            paramType: ts.Diagnostics.FILE
+        },
+        {
+            name: "outDir",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "preserveConstEnums",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
+        },
+        {
+            name: "pretty",
+            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental,
+            type: "boolean"
+        },
+        {
+            name: "project",
+            shortName: "p",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Compile_the_project_in_the_given_directory,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "removeComments",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_comments_to_output
+        },
+        {
+            name: "rootDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.LOCATION,
+            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir
+        },
+        {
+            name: "isolatedModules",
+            type: "boolean"
+        },
+        {
+            name: "sourceMap",
+            type: "boolean",
+            description: ts.Diagnostics.Generates_corresponding_map_file
+        },
+        {
+            name: "sourceRoot",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
+            paramType: ts.Diagnostics.LOCATION
+        },
+        {
+            name: "suppressExcessPropertyErrors",
+            type: "boolean",
+            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
+            experimental: true
+        },
+        {
+            name: "suppressImplicitAnyIndexErrors",
+            type: "boolean",
+            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures
+        },
+        {
+            name: "stripInternal",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
+            experimental: true
+        },
+        {
+            name: "target",
+            shortName: "t",
+            type: {
+                "es3": 0,
+                "es5": 1,
+                "es6": 2,
+                "es2015": 2
+            },
+            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
+            paramType: ts.Diagnostics.VERSION
+        },
+        {
+            name: "version",
+            shortName: "v",
+            type: "boolean",
+            description: ts.Diagnostics.Print_the_compiler_s_version
+        },
+        {
+            name: "watch",
+            shortName: "w",
+            type: "boolean",
+            description: ts.Diagnostics.Watch_input_files
+        },
+        {
+            name: "experimentalDecorators",
+            type: "boolean",
+            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
+        },
+        {
+            name: "emitDecoratorMetadata",
+            type: "boolean",
+            experimental: true,
+            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
+        },
+        {
+            name: "moduleResolution",
+            type: {
+                "node": ts.ModuleResolutionKind.NodeJs,
+                "classic": ts.ModuleResolutionKind.Classic
+            },
+            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6
+        },
+        {
+            name: "allowUnusedLabels",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
+        },
+        {
+            name: "noImplicitReturns",
+            type: "boolean",
+            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
+        },
+        {
+            name: "noFallthroughCasesInSwitch",
+            type: "boolean",
+            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
+        },
+        {
+            name: "allowUnreachableCode",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
+        },
+        {
+            name: "forceConsistentCasingInFileNames",
+            type: "boolean",
+            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
+        },
+        {
+            name: "baseUrl",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
+        },
+        {
+            name: "paths",
+            type: "object",
+            isTSConfigOnly: true
+        },
+        {
+            name: "rootDirs",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "rootDirs",
+                type: "string",
+                isFilePath: true
+            }
+        },
+        {
+            name: "typesSearchPaths",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "typesSearchPaths",
+                type: "string",
+                isFilePath: true
+            }
+        },
+        {
+            name: "typesRoot",
+            type: "string"
+        },
+        {
+            name: "types",
+            type: "list",
+            element: {
+                name: "types",
+                type: "string"
+            },
+            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
+        },
+        {
+            name: "traceResolution",
+            type: "boolean",
+            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
+        },
+        {
+            name: "allowJs",
+            type: "boolean",
+            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
+        },
+        {
+            name: "allowSyntheticDefaultImports",
+            type: "boolean",
+            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
+        },
+        {
+            name: "noImplicitUseStrict",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
+        },
+        {
+            name: "listEmittedFiles",
+            type: "boolean"
+        },
+        {
+            name: "lib",
+            type: "list",
+            element: {
+                name: "lib",
+                type: {
+                    "es5": "lib.es5.d.ts",
+                    "es6": "lib.es2015.d.ts",
+                    "es2015": "lib.es2015.d.ts",
+                    "es7": "lib.es2016.d.ts",
+                    "es2016": "lib.es2016.d.ts",
+                    "es2017": "lib.es2017.d.ts",
+                    "dom": "lib.dom.d.ts",
+                    "webworker": "lib.webworker.d.ts",
+                    "scripthost": "lib.scripthost.d.ts",
+                    "es2015.core": "lib.es2015.core.d.ts",
+                    "es2015.collection": "lib.es2015.collection.d.ts",
+                    "es2015.generator": "lib.es2015.generator.d.ts",
+                    "es2015.iterable": "lib.es2015.iterable.d.ts",
+                    "es2015.promise": "lib.es2015.promise.d.ts",
+                    "es2015.proxy": "lib.es2015.proxy.d.ts",
+                    "es2015.reflect": "lib.es2015.reflect.d.ts",
+                    "es2015.symbol": "lib.es2015.symbol.d.ts",
+                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
+                    "es2016.array.include": "lib.es2016.array.include.d.ts",
+                    "es2017.object": "lib.es2017.object.d.ts",
+                    "es2017.sharedmemory": "lib.es2017.sharedmemory.d.ts"
+                }
+            },
+            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
+        },
+        {
+            name: "strictNullChecks",
+            type: "boolean",
+            description: ts.Diagnostics.Enable_strict_null_checks
+        }
+    ];
+    ts.typingOptionDeclarations = [
+        {
+            name: "enableAutoDiscovery",
+            type: "boolean"
+        },
+        {
+            name: "include",
+            type: "list",
+            element: {
+                name: "include",
+                type: "string"
+            }
+        },
+        {
+            name: "exclude",
+            type: "list",
+            element: {
+                name: "exclude",
+                type: "string"
+            }
+        }
+    ];
+    var optionNameMapCache;
+    function getOptionNameMap() {
+        if (optionNameMapCache) {
+            return optionNameMapCache;
+        }
+        var optionNameMap = {};
+        var shortOptionNames = {};
+        ts.forEach(ts.optionDeclarations, function (option) {
+            optionNameMap[option.name.toLowerCase()] = option;
+            if (option.shortName) {
+                shortOptionNames[option.shortName] = option.name;
+            }
+        });
+        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
+        return optionNameMapCache;
+    }
+    ts.getOptionNameMap = getOptionNameMap;
+    function createCompilerDiagnosticForInvalidCustomType(opt) {
+        var namesOfType = [];
+        ts.forEachKey(opt.type, function (key) {
+            namesOfType.push(" '" + key + "'");
+        });
+        return ts.createCompilerDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
+    }
+    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
+    function parseCustomTypeOption(opt, value, errors) {
+        var key = trimString((value || "")).toLowerCase();
+        var map = opt.type;
+        if (ts.hasProperty(map, key)) {
+            return map[key];
+        }
+        else {
+            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
+        }
+    }
+    ts.parseCustomTypeOption = parseCustomTypeOption;
+    function parseListTypeOption(opt, value, errors) {
+        var values = trimString((value || "")).split(",");
+        switch (opt.element.type) {
+            case "number":
+                return ts.map(values, parseInt);
+            case "string":
+                return ts.map(values, function (v) { return v || ""; });
+            default:
+                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
+        }
+    }
+    ts.parseListTypeOption = parseListTypeOption;
+    function parseCommandLine(commandLine, readFile) {
+        var options = {};
+        var fileNames = [];
+        var errors = [];
+        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
+        parseStrings(commandLine);
+        return {
+            options: options,
+            fileNames: fileNames,
+            errors: errors
+        };
+        function parseStrings(args) {
+            var i = 0;
+            while (i < args.length) {
+                var s = args[i];
+                i++;
+                if (s.charCodeAt(0) === 64) {
+                    parseResponseFile(s.slice(1));
+                }
+                else if (s.charCodeAt(0) === 45) {
+                    s = s.slice(s.charCodeAt(1) === 45 ? 2 : 1).toLowerCase();
+                    if (ts.hasProperty(shortOptionNames, s)) {
+                        s = shortOptionNames[s];
+                    }
+                    if (ts.hasProperty(optionNameMap, s)) {
+                        var opt = optionNameMap[s];
+                        if (opt.isTSConfigOnly) {
+                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
+                        }
+                        else {
+                            if (!args[i] && opt.type !== "boolean") {
+                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
+                            }
+                            switch (opt.type) {
+                                case "number":
+                                    options[opt.name] = parseInt(args[i]);
+                                    i++;
+                                    break;
+                                case "boolean":
+                                    options[opt.name] = true;
+                                    break;
+                                case "string":
+                                    options[opt.name] = args[i] || "";
+                                    i++;
+                                    break;
+                                case "list":
+                                    options[opt.name] = parseListTypeOption(opt, args[i], errors);
+                                    i++;
+                                    break;
+                                default:
+                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
+                                    i++;
+                                    break;
+                            }
+                        }
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
+                    }
+                }
+                else {
+                    fileNames.push(s);
+                }
+            }
+        }
+        function parseResponseFile(fileName) {
+            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
+            if (!text) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
+                return;
+            }
+            var args = [];
+            var pos = 0;
+            while (true) {
+                while (pos < text.length && text.charCodeAt(pos) <= 32)
+                    pos++;
+                if (pos >= text.length)
+                    break;
+                var start = pos;
+                if (text.charCodeAt(start) === 34) {
+                    pos++;
+                    while (pos < text.length && text.charCodeAt(pos) !== 34)
+                        pos++;
+                    if (pos < text.length) {
+                        args.push(text.substring(start + 1, pos));
+                        pos++;
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
+                    }
+                }
+                else {
+                    while (text.charCodeAt(pos) > 32)
+                        pos++;
+                    args.push(text.substring(start, pos));
+                }
+            }
+            parseStrings(args);
+        }
+    }
+    ts.parseCommandLine = parseCommandLine;
+    function readConfigFile(fileName, readFile) {
+        var text = "";
+        try {
+            text = readFile(fileName);
+        }
+        catch (e) {
+            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
+        }
+        return parseConfigFileTextToJson(fileName, text);
+    }
+    ts.readConfigFile = readConfigFile;
+    function parseConfigFileTextToJson(fileName, jsonText) {
+        try {
+            var jsonTextWithoutComments = removeComments(jsonText);
+            return { config: /\S/.test(jsonTextWithoutComments) ? JSON.parse(jsonTextWithoutComments) : {} };
+        }
+        catch (e) {
+            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) };
+        }
+    }
+    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
+    function removeComments(jsonText) {
+        var output = "";
+        var scanner = ts.createScanner(1, false, 0, jsonText);
+        var token;
+        while ((token = scanner.scan()) !== 1) {
+            switch (token) {
+                case 2:
+                case 3:
+                    output += scanner.getTokenText().replace(/\S/g, " ");
+                    break;
+                default:
+                    output += scanner.getTokenText();
+                    break;
+            }
+        }
+        return output;
+    }
+    var IgnoreFileNamePattern = /(\.min\.js$)|([\\/]\.[\w.])/;
+    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName) {
+        if (existingOptions === void 0) { existingOptions = {}; }
+        var errors = [];
+        var compilerOptions = convertCompilerOptionsFromJsonWorker(json["compilerOptions"], basePath, errors, configFileName);
+        var options = ts.extend(existingOptions, compilerOptions);
+        var typingOptions = convertTypingOptionsFromJsonWorker(json["typingOptions"], basePath, errors, configFileName);
+        options.configFilePath = configFileName;
+        var fileNames = getFileNames(errors);
+        return {
+            options: options,
+            fileNames: fileNames,
+            typingOptions: typingOptions,
+            raw: json,
+            errors: errors
+        };
+        function getFileNames(errors) {
+            var fileNames = [];
+            if (ts.hasProperty(json, "files")) {
+                if (ts.isArray(json["files"])) {
+                    fileNames = ts.map(json["files"], function (s) { return ts.combinePaths(basePath, s); });
+                }
+                else {
+                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
+                }
+            }
+            else {
+                var filesSeen = {};
+                var exclude = [];
+                if (ts.isArray(json["exclude"])) {
+                    exclude = json["exclude"];
+                }
+                else {
+                    exclude = ["node_modules", "bower_components", "jspm_packages"];
+                }
+                var outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
+                if (outDir) {
+                    exclude.push(outDir);
+                }
+                exclude = ts.map(exclude, function (e) { return ts.getNormalizedAbsolutePath(e, basePath); });
+                var supportedExtensions = ts.getSupportedExtensions(options);
+                ts.Debug.assert(ts.indexOf(supportedExtensions, ".ts") < ts.indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
+                for (var _i = 0, supportedExtensions_1 = supportedExtensions; _i < supportedExtensions_1.length; _i++) {
+                    var extension = supportedExtensions_1[_i];
+                    var filesInDirWithExtension = host.readDirectory(basePath, extension, exclude);
+                    for (var _a = 0, filesInDirWithExtension_1 = filesInDirWithExtension; _a < filesInDirWithExtension_1.length; _a++) {
+                        var fileName = filesInDirWithExtension_1[_a];
+                        if (extension === ".ts" && ts.fileExtensionIs(fileName, ".d.ts")) {
+                            continue;
+                        }
+                        if (IgnoreFileNamePattern.test(fileName)) {
+                            continue;
+                        }
+                        if (extension === ".d.ts" || (options.allowJs && ts.contains(ts.supportedJavascriptExtensions, extension))) {
+                            var baseName = fileName.substr(0, fileName.length - extension.length);
+                            if (ts.hasProperty(filesSeen, baseName + ".ts") || ts.hasProperty(filesSeen, baseName + ".tsx")) {
+                                continue;
+                            }
+                        }
+                        filesSeen[fileName] = true;
+                        fileNames.push(fileName);
+                    }
+                }
+            }
+            if (ts.hasProperty(json, "excludes") && !ts.hasProperty(json, "exclude")) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
+            }
+            return fileNames;
+        }
+    }
+    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
+    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
+    function convertTypingOptionsFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertTypingOptionsFromJson = convertTypingOptionsFromJson;
+    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = ts.getBaseFileName(configFileName) === "jsconfig.json" ? { allowJs: true } : {};
+        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
+        return options;
+    }
+    function convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
+            ? { enableAutoDiscovery: true, include: [], exclude: [] }
+            : { enableAutoDiscovery: false, include: [], exclude: [] };
+        convertOptionsFromJson(ts.typingOptionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_typing_option_0, errors);
+        return options;
+    }
+    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
+        if (!jsonOptions) {
+            return;
+        }
+        var optionNameMap = ts.arrayToMap(optionDeclarations, function (opt) { return opt.name; });
+        for (var id in jsonOptions) {
+            if (ts.hasProperty(optionNameMap, id)) {
+                var opt = optionNameMap[id];
+                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
+            }
+            else {
+                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
+            }
+        }
+    }
+    function convertJsonOption(opt, value, basePath, errors) {
+        var optType = opt.type;
+        var expectedType = typeof optType === "string" ? optType : "string";
+        if (optType === "list" && ts.isArray(value)) {
+            return convertJsonOptionOfListType(opt, value, basePath, errors);
+        }
+        else if (typeof value === expectedType) {
+            if (typeof optType !== "string") {
+                return convertJsonOptionOfCustomType(opt, value, errors);
+            }
+            else {
+                if (opt.isFilePath) {
+                    value = ts.normalizePath(ts.combinePaths(basePath, value));
+                    if (value === "") {
+                        value = ".";
+                    }
+                }
+            }
+            return value;
+        }
+        else {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, expectedType));
+        }
+    }
+    function convertJsonOptionOfCustomType(opt, value, errors) {
+        var key = value.toLowerCase();
+        if (ts.hasProperty(opt.type, key)) {
+            return opt.type[key];
+        }
+        else {
+            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
+        }
+    }
+    function convertJsonOptionOfListType(option, values, basePath, errors) {
+        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
+    }
+    function trimString(s) {
+        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
+    }
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getDeclarationOfKind(symbol, kind) {
+        var declarations = symbol.declarations;
+        if (declarations) {
+            for (var _i = 0, declarations_1 = declarations; _i < declarations_1.length; _i++) {
+                var declaration = declarations_1[_i];
+                if (declaration.kind === kind) {
+                    return declaration;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getDeclarationOfKind = getDeclarationOfKind;
+    var stringWriters = [];
+    function getSingleLineStringWriter() {
+        if (stringWriters.length === 0) {
+            var str_1 = "";
+            var writeText = function (text) { return str_1 += text; };
+            return {
+                string: function () { return str_1; },
+                writeKeyword: writeText,
+                writeOperator: writeText,
+                writePunctuation: writeText,
+                writeSpace: writeText,
+                writeStringLiteral: writeText,
+                writeParameter: writeText,
+                writeSymbol: writeText,
+                writeLine: function () { return str_1 += " "; },
+                increaseIndent: function () { },
+                decreaseIndent: function () { },
+                clear: function () { return str_1 = ""; },
+                trackSymbol: function () { },
+                reportInaccessibleThisError: function () { }
+            };
+        }
+        return stringWriters.pop();
+    }
+    ts.getSingleLineStringWriter = getSingleLineStringWriter;
+    function releaseStringWriter(writer) {
+        writer.clear();
+        stringWriters.push(writer);
+    }
+    ts.releaseStringWriter = releaseStringWriter;
+    function getFullWidth(node) {
+        return node.end - node.pos;
+    }
+    ts.getFullWidth = getFullWidth;
+    function mapIsEqualTo(map1, map2) {
+        if (!map1 || !map2) {
+            return map1 === map2;
+        }
+        return containsAll(map1, map2) && containsAll(map2, map1);
+    }
+    ts.mapIsEqualTo = mapIsEqualTo;
+    function containsAll(map, other) {
+        for (var key in map) {
+            if (!ts.hasProperty(map, key)) {
+                continue;
+            }
+            if (!ts.hasProperty(other, key) || map[key] !== other[key]) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function arrayIsEqualTo(array1, array2, equaler) {
+        if (!array1 || !array2) {
+            return array1 === array2;
+        }
+        if (array1.length !== array2.length) {
+            return false;
+        }
+        for (var i = 0; i < array1.length; i++) {
+            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
+            if (!equals) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.arrayIsEqualTo = arrayIsEqualTo;
+    function hasResolvedModule(sourceFile, moduleNameText) {
+        return sourceFile.resolvedModules && ts.hasProperty(sourceFile.resolvedModules, moduleNameText);
+    }
+    ts.hasResolvedModule = hasResolvedModule;
+    function getResolvedModule(sourceFile, moduleNameText) {
+        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
+    }
+    ts.getResolvedModule = getResolvedModule;
+    function setResolvedModule(sourceFile, moduleNameText, resolvedModule) {
+        if (!sourceFile.resolvedModules) {
+            sourceFile.resolvedModules = {};
+        }
+        sourceFile.resolvedModules[moduleNameText] = resolvedModule;
+    }
+    ts.setResolvedModule = setResolvedModule;
+    function setResolvedTypeReferenceDirective(sourceFile, typeReferenceDirectiveName, resolvedTypeReferenceDirective) {
+        if (!sourceFile.resolvedTypeReferenceDirectiveNames) {
+            sourceFile.resolvedTypeReferenceDirectiveNames = {};
+        }
+        sourceFile.resolvedTypeReferenceDirectiveNames[typeReferenceDirectiveName] = resolvedTypeReferenceDirective;
+    }
+    ts.setResolvedTypeReferenceDirective = setResolvedTypeReferenceDirective;
+    function moduleResolutionIsEqualTo(oldResolution, newResolution) {
+        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport;
+    }
+    ts.moduleResolutionIsEqualTo = moduleResolutionIsEqualTo;
+    function typeDirectiveIsEqualTo(oldResolution, newResolution) {
+        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.primary === newResolution.primary;
+    }
+    ts.typeDirectiveIsEqualTo = typeDirectiveIsEqualTo;
+    function hasChangesInResolutions(names, newResolutions, oldResolutions, comparer) {
+        if (names.length !== newResolutions.length) {
+            return false;
+        }
+        for (var i = 0; i < names.length; i++) {
+            var newResolution = newResolutions[i];
+            var oldResolution = oldResolutions && ts.hasProperty(oldResolutions, names[i]) ? oldResolutions[names[i]] : undefined;
+            var changed = oldResolution
+                ? !newResolution || !comparer(oldResolution, newResolution)
+                : newResolution;
+            if (changed) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.hasChangesInResolutions = hasChangesInResolutions;
+    function containsParseError(node) {
+        aggregateChildData(node);
+        return (node.flags & 268435456) !== 0;
+    }
+    ts.containsParseError = containsParseError;
+    function aggregateChildData(node) {
+        if (!(node.flags & 536870912)) {
+            var thisNodeOrAnySubNodesHasError = ((node.flags & 67108864) !== 0) ||
+                ts.forEachChild(node, containsParseError);
+            if (thisNodeOrAnySubNodesHasError) {
+                node.flags |= 268435456;
+            }
+            node.flags |= 536870912;
+        }
+    }
+    function getSourceFileOfNode(node) {
+        while (node && node.kind !== 256) {
+            node = node.parent;
+        }
+        return node;
+    }
+    ts.getSourceFileOfNode = getSourceFileOfNode;
+    function isStatementWithLocals(node) {
+        switch (node.kind) {
+            case 199:
+            case 227:
+            case 206:
+            case 207:
+            case 208:
+                return true;
+        }
+        return false;
+    }
+    ts.isStatementWithLocals = isStatementWithLocals;
+    function getStartPositionOfLine(line, sourceFile) {
+        ts.Debug.assert(line >= 0);
+        return ts.getLineStarts(sourceFile)[line];
+    }
+    ts.getStartPositionOfLine = getStartPositionOfLine;
+    function nodePosToString(node) {
+        var file = getSourceFileOfNode(node);
+        var loc = ts.getLineAndCharacterOfPosition(file, node.pos);
+        return file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + ")";
+    }
+    ts.nodePosToString = nodePosToString;
+    function getStartPosOfNode(node) {
+        return node.pos;
+    }
+    ts.getStartPosOfNode = getStartPosOfNode;
+    function getEndLinePosition(line, sourceFile) {
+        ts.Debug.assert(line >= 0);
+        var lineStarts = ts.getLineStarts(sourceFile);
+        var lineIndex = line;
+        var sourceText = sourceFile.text;
+        if (lineIndex + 1 === lineStarts.length) {
+            return sourceText.length - 1;
+        }
+        else {
+            var start = lineStarts[lineIndex];
+            var pos = lineStarts[lineIndex + 1] - 1;
+            ts.Debug.assert(ts.isLineBreak(sourceText.charCodeAt(pos)));
+            while (start <= pos && ts.isLineBreak(sourceText.charCodeAt(pos))) {
+                pos--;
+            }
+            return pos;
+        }
+    }
+    ts.getEndLinePosition = getEndLinePosition;
+    function nodeIsMissing(node) {
+        if (!node) {
+            return true;
+        }
+        return node.pos === node.end && node.pos >= 0 && node.kind !== 1;
+    }
+    ts.nodeIsMissing = nodeIsMissing;
+    function nodeIsPresent(node) {
+        return !nodeIsMissing(node);
+    }
+    ts.nodeIsPresent = nodeIsPresent;
+    function getTokenPosOfNode(node, sourceFile, includeJsDocComment) {
+        if (nodeIsMissing(node)) {
+            return node.pos;
+        }
+        if (isJSDocNode(node)) {
+            return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos, false, true);
+        }
+        if (includeJsDocComment && node.jsDocComments && node.jsDocComments.length > 0) {
+            return getTokenPosOfNode(node.jsDocComments[0]);
+        }
+        if (node.kind === 282 && node._children.length > 0) {
+            return getTokenPosOfNode(node._children[0], sourceFile, includeJsDocComment);
+        }
+        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
+    }
+    ts.getTokenPosOfNode = getTokenPosOfNode;
+    function isJSDocNode(node) {
+        return node.kind >= 257 && node.kind <= 281;
+    }
+    ts.isJSDocNode = isJSDocNode;
+    function getNonDecoratorTokenPosOfNode(node, sourceFile) {
+        if (nodeIsMissing(node) || !node.decorators) {
+            return getTokenPosOfNode(node, sourceFile);
+        }
+        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.decorators.end);
+    }
+    ts.getNonDecoratorTokenPosOfNode = getNonDecoratorTokenPosOfNode;
+    function getSourceTextOfNodeFromSourceFile(sourceFile, node, includeTrivia) {
+        if (includeTrivia === void 0) { includeTrivia = false; }
+        if (nodeIsMissing(node)) {
+            return "";
+        }
+        var text = sourceFile.text;
+        return text.substring(includeTrivia ? node.pos : ts.skipTrivia(text, node.pos), node.end);
+    }
+    ts.getSourceTextOfNodeFromSourceFile = getSourceTextOfNodeFromSourceFile;
+    function getTextOfNodeFromSourceText(sourceText, node) {
+        if (nodeIsMissing(node)) {
+            return "";
+        }
+        return sourceText.substring(ts.skipTrivia(sourceText, node.pos), node.end);
+    }
+    ts.getTextOfNodeFromSourceText = getTextOfNodeFromSourceText;
+    function getTextOfNode(node, includeTrivia) {
+        if (includeTrivia === void 0) { includeTrivia = false; }
+        return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
+    }
+    ts.getTextOfNode = getTextOfNode;
+    function escapeIdentifier(identifier) {
+        return identifier.length >= 2 && identifier.charCodeAt(0) === 95 && identifier.charCodeAt(1) === 95 ? "_" + identifier : identifier;
+    }
+    ts.escapeIdentifier = escapeIdentifier;
+    function unescapeIdentifier(identifier) {
+        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 && identifier.charCodeAt(1) === 95 && identifier.charCodeAt(2) === 95 ? identifier.substr(1) : identifier;
+    }
+    ts.unescapeIdentifier = unescapeIdentifier;
+    function makeIdentifierFromModuleName(moduleName) {
+        return ts.getBaseFileName(moduleName).replace(/^(\d)/, "_$1").replace(/\W/g, "_");
+    }
+    ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
+    function isBlockOrCatchScoped(declaration) {
+        return (getCombinedNodeFlags(declaration) & 3072) !== 0 ||
+            isCatchClauseVariableDeclaration(declaration);
+    }
+    ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
+    function isAmbientModule(node) {
+        return node && node.kind === 225 &&
+            (node.name.kind === 9 || isGlobalScopeAugmentation(node));
+    }
+    ts.isAmbientModule = isAmbientModule;
+    function isBlockScopedContainerTopLevel(node) {
+        return node.kind === 256 ||
+            node.kind === 225 ||
+            isFunctionLike(node) ||
+            isFunctionBlock(node);
+    }
+    ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
+    function isGlobalScopeAugmentation(module) {
+        return !!(module.flags & 131072);
+    }
+    ts.isGlobalScopeAugmentation = isGlobalScopeAugmentation;
+    function isExternalModuleAugmentation(node) {
+        if (!node || !isAmbientModule(node)) {
+            return false;
+        }
+        switch (node.parent.kind) {
+            case 256:
+                return ts.isExternalModule(node.parent);
+            case 226:
+                return isAmbientModule(node.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
+        }
+        return false;
+    }
+    ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
+    function getEnclosingBlockScopeContainer(node) {
+        var current = node.parent;
+        while (current) {
+            if (isFunctionLike(current)) {
+                return current;
+            }
+            switch (current.kind) {
+                case 256:
+                case 227:
+                case 252:
+                case 225:
+                case 206:
+                case 207:
+                case 208:
+                    return current;
+                case 199:
+                    if (!isFunctionLike(current.parent)) {
+                        return current;
+                    }
+            }
+            current = current.parent;
+        }
+    }
+    ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
+    function isCatchClauseVariableDeclaration(declaration) {
+        return declaration &&
+            declaration.kind === 218 &&
+            declaration.parent &&
+            declaration.parent.kind === 252;
+    }
+    ts.isCatchClauseVariableDeclaration = isCatchClauseVariableDeclaration;
+    function declarationNameToString(name) {
+        return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
+    }
+    ts.declarationNameToString = declarationNameToString;
+    function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
+        var sourceFile = getSourceFileOfNode(node);
+        var span = getErrorSpanForNode(sourceFile, node);
+        return ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2);
+    }
+    ts.createDiagnosticForNode = createDiagnosticForNode;
+    function createDiagnosticForNodeFromMessageChain(node, messageChain) {
+        var sourceFile = getSourceFileOfNode(node);
+        var span = getErrorSpanForNode(sourceFile, node);
+        return {
+            file: sourceFile,
+            start: span.start,
+            length: span.length,
+            code: messageChain.code,
+            category: messageChain.category,
+            messageText: messageChain.next ? messageChain : messageChain.messageText
+        };
+    }
+    ts.createDiagnosticForNodeFromMessageChain = createDiagnosticForNodeFromMessageChain;
+    function getSpanOfTokenAtPosition(sourceFile, pos) {
+        var scanner = ts.createScanner(sourceFile.languageVersion, true, sourceFile.languageVariant, sourceFile.text, undefined, pos);
+        scanner.scan();
+        var start = scanner.getTokenPos();
+        return ts.createTextSpanFromBounds(start, scanner.getTextPos());
+    }
+    ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
+    function getErrorSpanForArrowFunction(sourceFile, node) {
+        var pos = ts.skipTrivia(sourceFile.text, node.pos);
+        if (node.body && node.body.kind === 199) {
+            var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
+            var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
+            if (startLine < endLine) {
+                return ts.createTextSpan(pos, getEndLinePosition(startLine, sourceFile) - pos + 1);
+            }
+        }
+        return ts.createTextSpanFromBounds(pos, node.end);
+    }
+    function getErrorSpanForNode(sourceFile, node) {
+        var errorNode = node;
+        switch (node.kind) {
+            case 256:
+                var pos_1 = ts.skipTrivia(sourceFile.text, 0, false);
+                if (pos_1 === sourceFile.text.length) {
+                    return ts.createTextSpan(0, 0);
+                }
+                return getSpanOfTokenAtPosition(sourceFile, pos_1);
+            case 218:
+            case 169:
+            case 221:
+            case 192:
+            case 222:
+            case 225:
+            case 224:
+            case 255:
+            case 220:
+            case 179:
+            case 147:
+            case 149:
+            case 150:
+            case 223:
+                errorNode = node.name;
+                break;
+            case 180:
+                return getErrorSpanForArrowFunction(sourceFile, node);
+        }
+        if (errorNode === undefined) {
+            return getSpanOfTokenAtPosition(sourceFile, node.pos);
+        }
+        var pos = nodeIsMissing(errorNode)
+            ? errorNode.pos
+            : ts.skipTrivia(sourceFile.text, errorNode.pos);
+        return ts.createTextSpanFromBounds(pos, errorNode.end);
+    }
+    ts.getErrorSpanForNode = getErrorSpanForNode;
+    function isExternalOrCommonJsModule(file) {
+        return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
+    }
+    ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
+    function isDeclarationFile(file) {
+        return file.isDeclarationFile;
+    }
+    ts.isDeclarationFile = isDeclarationFile;
+    function isConstEnumDeclaration(node) {
+        return node.kind === 224 && isConst(node);
+    }
+    ts.isConstEnumDeclaration = isConstEnumDeclaration;
+    function walkUpBindingElementsAndPatterns(node) {
+        while (node && (node.kind === 169 || isBindingPattern(node))) {
+            node = node.parent;
+        }
+        return node;
+    }
+    function getCombinedNodeFlags(node) {
+        node = walkUpBindingElementsAndPatterns(node);
+        var flags = node.flags;
+        if (node.kind === 218) {
+            node = node.parent;
+        }
+        if (node && node.kind === 219) {
+            flags |= node.flags;
+            node = node.parent;
+        }
+        if (node && node.kind === 200) {
+            flags |= node.flags;
+        }
+        return flags;
+    }
+    ts.getCombinedNodeFlags = getCombinedNodeFlags;
+    function isConst(node) {
+        return !!(getCombinedNodeFlags(node) & 2048);
+    }
+    ts.isConst = isConst;
+    function isLet(node) {
+        return !!(getCombinedNodeFlags(node) & 1024);
+    }
+    ts.isLet = isLet;
+    function isSuperCallExpression(n) {
+        return n.kind === 174 && n.expression.kind === 95;
+    }
+    ts.isSuperCallExpression = isSuperCallExpression;
+    function isPrologueDirective(node) {
+        return node.kind === 202 && node.expression.kind === 9;
+    }
+    ts.isPrologueDirective = isPrologueDirective;
+    function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
+        return ts.getLeadingCommentRanges(sourceFileOfNode.text, node.pos);
+    }
+    ts.getLeadingCommentRangesOfNode = getLeadingCommentRangesOfNode;
+    function getLeadingCommentRangesOfNodeFromText(node, text) {
+        return ts.getLeadingCommentRanges(text, node.pos);
+    }
+    ts.getLeadingCommentRangesOfNodeFromText = getLeadingCommentRangesOfNodeFromText;
+    function getJsDocComments(node, sourceFileOfNode) {
+        return getJsDocCommentsFromText(node, sourceFileOfNode.text);
+    }
+    ts.getJsDocComments = getJsDocComments;
+    function getJsDocCommentsFromText(node, text) {
+        var commentRanges = (node.kind === 142 ||
+            node.kind === 141 ||
+            node.kind === 179 ||
+            node.kind === 180) ?
+            ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
+            getLeadingCommentRangesOfNodeFromText(node, text);
+        return ts.filter(commentRanges, isJsDocComment);
+        function isJsDocComment(comment) {
+            return text.charCodeAt(comment.pos + 1) === 42 &&
+                text.charCodeAt(comment.pos + 2) === 42 &&
+                text.charCodeAt(comment.pos + 3) !== 47;
+        }
+    }
+    ts.getJsDocCommentsFromText = getJsDocCommentsFromText;
+    ts.fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
+    ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx = /^(\/\/\/\s*<reference\s+types\s*=\s*)('|")(.+?)\2.*?\/>/;
+    ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
+    function isTypeNode(node) {
+        if (154 <= node.kind && node.kind <= 166) {
+            return true;
+        }
+        switch (node.kind) {
+            case 117:
+            case 130:
+            case 132:
+            case 120:
+            case 133:
+            case 135:
+            case 127:
+                return true;
+            case 103:
+                return node.parent.kind !== 183;
+            case 194:
+                return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
+            case 69:
+                if (node.parent.kind === 139 && node.parent.right === node) {
+                    node = node.parent;
+                }
+                else if (node.parent.kind === 172 && node.parent.name === node) {
+                    node = node.parent;
+                }
+                ts.Debug.assert(node.kind === 69 || node.kind === 139 || node.kind === 172, "'node' was expected to be a qualified name, identifier or property access in 'isTypeNode'.");
+            case 139:
+            case 172:
+            case 97:
+                var parent_1 = node.parent;
+                if (parent_1.kind === 158) {
+                    return false;
+                }
+                if (154 <= parent_1.kind && parent_1.kind <= 166) {
+                    return true;
+                }
+                switch (parent_1.kind) {
+                    case 194:
+                        return !isExpressionWithTypeArgumentsInClassExtendsClause(parent_1);
+                    case 141:
+                        return node === parent_1.constraint;
+                    case 145:
+                    case 144:
+                    case 142:
+                    case 218:
+                        return node === parent_1.type;
+                    case 220:
+                    case 179:
+                    case 180:
+                    case 148:
+                    case 147:
+                    case 146:
+                    case 149:
+                    case 150:
+                        return node === parent_1.type;
+                    case 151:
+                    case 152:
+                    case 153:
+                        return node === parent_1.type;
+                    case 177:
+                        return node === parent_1.type;
+                    case 174:
+                    case 175:
+                        return parent_1.typeArguments && ts.indexOf(parent_1.typeArguments, node) >= 0;
+                    case 176:
+                        return false;
+                }
+        }
+        return false;
+    }
+    ts.isTypeNode = isTypeNode;
+    function forEachReturnStatement(body, visitor) {
+        return traverse(body);
+        function traverse(node) {
+            switch (node.kind) {
+                case 211:
+                    return visitor(node);
+                case 227:
+                case 199:
+                case 203:
+                case 204:
+                case 205:
+                case 206:
+                case 207:
+                case 208:
+                case 212:
+                case 213:
+                case 249:
+                case 250:
+                case 214:
+                case 216:
+                case 252:
+                    return ts.forEachChild(node, traverse);
+            }
+        }
+    }
+    ts.forEachReturnStatement = forEachReturnStatement;
+    function forEachYieldExpression(body, visitor) {
+        return traverse(body);
+        function traverse(node) {
+            switch (node.kind) {
+                case 190:
+                    visitor(node);
+                    var operand = node.expression;
+                    if (operand) {
+                        traverse(operand);
+                    }
+                case 224:
+                case 222:
+                case 225:
+                case 223:
+                case 221:
+                case 192:
+                    return;
+                default:
+                    if (isFunctionLike(node)) {
+                        var name_5 = node.name;
+                        if (name_5 && name_5.kind === 140) {
+                            traverse(name_5.expression);
+                            return;
+                        }
+                    }
+                    else if (!isTypeNode(node)) {
+                        ts.forEachChild(node, traverse);
+                    }
+            }
+        }
+    }
+    ts.forEachYieldExpression = forEachYieldExpression;
+    function isVariableLike(node) {
+        if (node) {
+            switch (node.kind) {
+                case 169:
+                case 255:
+                case 142:
+                case 253:
+                case 145:
+                case 144:
+                case 254:
+                case 218:
+                    return true;
+            }
+        }
+        return false;
+    }
+    ts.isVariableLike = isVariableLike;
+    function isAccessor(node) {
+        return node && (node.kind === 149 || node.kind === 150);
+    }
+    ts.isAccessor = isAccessor;
+    function isClassLike(node) {
+        return node && (node.kind === 221 || node.kind === 192);
+    }
+    ts.isClassLike = isClassLike;
+    function isFunctionLike(node) {
+        return node && isFunctionLikeKind(node.kind);
+    }
+    ts.isFunctionLike = isFunctionLike;
+    function isFunctionLikeKind(kind) {
+        switch (kind) {
+            case 148:
+            case 179:
+            case 220:
+            case 180:
+            case 147:
+            case 146:
+            case 149:
+            case 150:
+            case 151:
+            case 152:
+            case 153:
+            case 156:
+            case 157:
+                return true;
+        }
+    }
+    ts.isFunctionLikeKind = isFunctionLikeKind;
+    function introducesArgumentsExoticObject(node) {
+        switch (node.kind) {
+            case 147:
+            case 146:
+            case 148:
+            case 149:
+            case 150:
+            case 220:
+            case 179:
+                return true;
+        }
+        return false;
+    }
+    ts.introducesArgumentsExoticObject = introducesArgumentsExoticObject;
+    function isIterationStatement(node, lookInLabeledStatements) {
+        switch (node.kind) {
+            case 206:
+            case 207:
+            case 208:
+            case 204:
+            case 205:
+                return true;
+            case 214:
+                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
+        }
+        return false;
+    }
+    ts.isIterationStatement = isIterationStatement;
+    function isFunctionBlock(node) {
+        return node && node.kind === 199 && isFunctionLike(node.parent);
+    }
+    ts.isFunctionBlock = isFunctionBlock;
+    function isObjectLiteralMethod(node) {
+        return node && node.kind === 147 && node.parent.kind === 171;
+    }
+    ts.isObjectLiteralMethod = isObjectLiteralMethod;
+    function isIdentifierTypePredicate(predicate) {
+        return predicate && predicate.kind === 1;
+    }
+    ts.isIdentifierTypePredicate = isIdentifierTypePredicate;
+    function isThisTypePredicate(predicate) {
+        return predicate && predicate.kind === 0;
+    }
+    ts.isThisTypePredicate = isThisTypePredicate;
+    function getContainingFunction(node) {
+        while (true) {
+            node = node.parent;
+            if (!node || isFunctionLike(node)) {
+                return node;
+            }
+        }
+    }
+    ts.getContainingFunction = getContainingFunction;
+    function getContainingClass(node) {
+        while (true) {
+            node = node.parent;
+            if (!node || isClassLike(node)) {
+                return node;
+            }
+        }
+    }
+    ts.getContainingClass = getContainingClass;
+    function getThisContainer(node, includeArrowFunctions) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return undefined;
+            }
+            switch (node.kind) {
+                case 140:
+                    if (isClassLike(node.parent.parent)) {
+                        return node;
+                    }
+                    node = node.parent;
+                    break;
+                case 143:
+                    if (node.parent.kind === 142 && isClassElement(node.parent.parent)) {
+                        node = node.parent.parent;
+                    }
+                    else if (isClassElement(node.parent)) {
+                        node = node.parent;
+                    }
+                    break;
+                case 180:
+                    if (!includeArrowFunctions) {
+                        continue;
+                    }
+                case 220:
+                case 179:
+                case 225:
+                case 145:
+                case 144:
+                case 147:
+                case 146:
+                case 148:
+                case 149:
+                case 150:
+                case 151:
+                case 152:
+                case 153:
+                case 224:
+                case 256:
+                    return node;
+            }
+        }
+    }
+    ts.getThisContainer = getThisContainer;
+    function getSuperContainer(node, stopOnFunctions) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return node;
+            }
+            switch (node.kind) {
+                case 140:
+                    node = node.parent;
+                    break;
+                case 220:
+                case 179:
+                case 180:
+                    if (!stopOnFunctions) {
+                        continue;
+                    }
+                case 145:
+                case 144:
+                case 147:
+                case 146:
+                case 148:
+                case 149:
+                case 150:
+                    return node;
+                case 143:
+                    if (node.parent.kind === 142 && isClassElement(node.parent.parent)) {
+                        node = node.parent.parent;
+                    }
+                    else if (isClassElement(node.parent)) {
+                        node = node.parent;
+                    }
+                    break;
+            }
+        }
+    }
+    ts.getSuperContainer = getSuperContainer;
+    function getImmediatelyInvokedFunctionExpression(func) {
+        if (func.kind === 179 || func.kind === 180) {
+            var prev = func;
+            var parent_2 = func.parent;
+            while (parent_2.kind === 178) {
+                prev = parent_2;
+                parent_2 = parent_2.parent;
+            }
+            if (parent_2.kind === 174 && parent_2.expression === prev) {
+                return parent_2;
+            }
+        }
+    }
+    ts.getImmediatelyInvokedFunctionExpression = getImmediatelyInvokedFunctionExpression;
+    function isSuperPropertyOrElementAccess(node) {
+        return (node.kind === 172
+            || node.kind === 173)
+            && node.expression.kind === 95;
+    }
+    ts.isSuperPropertyOrElementAccess = isSuperPropertyOrElementAccess;
+    function getEntityNameFromTypeNode(node) {
+        if (node) {
+            switch (node.kind) {
+                case 155:
+                    return node.typeName;
+                case 194:
+                    return node.expression;
+                case 69:
+                case 139:
+                    return node;
+            }
+        }
+        return undefined;
+    }
+    ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
+    function getInvokedExpression(node) {
+        if (node.kind === 176) {
+            return node.tag;
+        }
+        return node.expression;
+    }
+    ts.getInvokedExpression = getInvokedExpression;
+    function nodeCanBeDecorated(node) {
+        switch (node.kind) {
+            case 221:
+                return true;
+            case 145:
+                return node.parent.kind === 221;
+            case 149:
+            case 150:
+            case 147:
+                return node.body !== undefined
+                    && node.parent.kind === 221;
+            case 142:
+                return node.parent.body !== undefined
+                    && (node.parent.kind === 148
+                        || node.parent.kind === 147
+                        || node.parent.kind === 150)
+                    && node.parent.parent.kind === 221;
+        }
+        return false;
+    }
+    ts.nodeCanBeDecorated = nodeCanBeDecorated;
+    function nodeIsDecorated(node) {
+        return node.decorators !== undefined
+            && nodeCanBeDecorated(node);
+    }
+    ts.nodeIsDecorated = nodeIsDecorated;
+    function isPropertyAccessExpression(node) {
+        return node.kind === 172;
+    }
+    ts.isPropertyAccessExpression = isPropertyAccessExpression;
+    function isElementAccessExpression(node) {
+        return node.kind === 173;
+    }
+    ts.isElementAccessExpression = isElementAccessExpression;
+    function isJSXTagName(node) {
+        var parent = node.parent;
+        if (parent.kind === 243 ||
+            parent.kind === 242 ||
+            parent.kind === 245) {
+            return parent.tagName === node;
+        }
+        return false;
+    }
+    ts.isJSXTagName = isJSXTagName;
+    function isExpression(node) {
+        switch (node.kind) {
+            case 97:
+            case 95:
+            case 93:
+            case 99:
+            case 84:
+            case 10:
+            case 170:
+            case 171:
+            case 172:
+            case 173:
+            case 174:
+            case 175:
+            case 176:
+            case 195:
+            case 177:
+            case 196:
+            case 178:
+            case 179:
+            case 192:
+            case 180:
+            case 183:
+            case 181:
+            case 182:
+            case 185:
+            case 186:
+            case 187:
+            case 188:
+            case 191:
+            case 189:
+            case 11:
+            case 193:
+            case 241:
+            case 242:
+            case 190:
+            case 184:
+                return true;
+            case 139:
+                while (node.parent.kind === 139) {
+                    node = node.parent;
+                }
+                return node.parent.kind === 158 || isJSXTagName(node);
+            case 69:
+                if (node.parent.kind === 158 || isJSXTagName(node)) {
+                    return true;
+                }
+            case 8:
+            case 9:
+            case 97:
+                var parent_3 = node.parent;
+                switch (parent_3.kind) {
+                    case 218:
+                    case 142:
+                    case 145:
+                    case 144:
+                    case 255:
+                    case 253:
+                    case 169:
+                        return parent_3.initializer === node;
+                    case 202:
+                    case 203:
+                    case 204:
+                    case 205:
+                    case 211:
+                    case 212:
+                    case 213:
+                    case 249:
+                    case 215:
+                    case 213:
+                        return parent_3.expression === node;
+                    case 206:
+                        var forStatement = parent_3;
+                        return (forStatement.initializer === node && forStatement.initializer.kind !== 219) ||
+                            forStatement.condition === node ||
+                            forStatement.incrementor === node;
+                    case 207:
+                    case 208:
+                        var forInStatement = parent_3;
+                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 219) ||
+                            forInStatement.expression === node;
+                    case 177:
+                    case 195:
+                        return node === parent_3.expression;
+                    case 197:
+                        return node === parent_3.expression;
+                    case 140:
+                        return node === parent_3.expression;
+                    case 143:
+                    case 248:
+                    case 247:
+                        return true;
+                    case 194:
+                        return parent_3.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent_3);
+                    default:
+                        if (isExpression(parent_3)) {
+                            return true;
+                        }
+                }
+        }
+        return false;
+    }
+    ts.isExpression = isExpression;
+    function isExternalModuleNameRelative(moduleName) {
+        return moduleName.substr(0, 2) === "./" || moduleName.substr(0, 3) === "../" || moduleName.substr(0, 2) === ".\\" || moduleName.substr(0, 3) === "..\\";
+    }
+    ts.isExternalModuleNameRelative = isExternalModuleNameRelative;
+    function isInstantiatedModule(node, preserveConstEnums) {
+        var moduleState = ts.getModuleInstanceState(node);
+        return moduleState === 1 ||
+            (preserveConstEnums && moduleState === 2);
+    }
+    ts.isInstantiatedModule = isInstantiatedModule;
+    function isExternalModuleImportEqualsDeclaration(node) {
+        return node.kind === 229 && node.moduleReference.kind === 240;
+    }
+    ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
+    function getExternalModuleImportEqualsDeclarationExpression(node) {
+        ts.Debug.assert(isExternalModuleImportEqualsDeclaration(node));
+        return node.moduleReference.expression;
+    }
+    ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
+    function isInternalModuleImportEqualsDeclaration(node) {
+        return node.kind === 229 && node.moduleReference.kind !== 240;
+    }
+    ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
+    function isSourceFileJavaScript(file) {
+        return isInJavaScriptFile(file);
+    }
+    ts.isSourceFileJavaScript = isSourceFileJavaScript;
+    function isInJavaScriptFile(node) {
+        return node && !!(node.flags & 134217728);
+    }
+    ts.isInJavaScriptFile = isInJavaScriptFile;
+    function isRequireCall(expression, checkArgumentIsStringLiteral) {
+        var isRequire = expression.kind === 174 &&
+            expression.expression.kind === 69 &&
+            expression.expression.text === "require" &&
+            expression.arguments.length === 1;
+        return isRequire && (!checkArgumentIsStringLiteral || expression.arguments[0].kind === 9);
+    }
+    ts.isRequireCall = isRequireCall;
+    function isSingleOrDoubleQuote(charCode) {
+        return charCode === 39 || charCode === 34;
+    }
+    ts.isSingleOrDoubleQuote = isSingleOrDoubleQuote;
+    function getSpecialPropertyAssignmentKind(expression) {
+        if (!isInJavaScriptFile(expression)) {
+            return 0;
+        }
+        if (expression.kind !== 187) {
+            return 0;
+        }
+        var expr = expression;
+        if (expr.operatorToken.kind !== 56 || expr.left.kind !== 172) {
+            return 0;
+        }
+        var lhs = expr.left;
+        if (lhs.expression.kind === 69) {
+            var lhsId = lhs.expression;
+            if (lhsId.text === "exports") {
+                return 1;
+            }
+            else if (lhsId.text === "module" && lhs.name.text === "exports") {
+                return 2;
+            }
+        }
+        else if (lhs.expression.kind === 97) {
+            return 4;
+        }
+        else if (lhs.expression.kind === 172) {
+            var innerPropertyAccess = lhs.expression;
+            if (innerPropertyAccess.expression.kind === 69) {
+                var innerPropertyAccessIdentifier = innerPropertyAccess.expression;
+                if (innerPropertyAccessIdentifier.text === "module" && innerPropertyAccess.name.text === "exports") {
+                    return 1;
+                }
+                if (innerPropertyAccess.name.text === "prototype") {
+                    return 3;
+                }
+            }
+        }
+        return 0;
+    }
+    ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
+    function getExternalModuleName(node) {
+        if (node.kind === 230) {
+            return node.moduleSpecifier;
+        }
+        if (node.kind === 229) {
+            var reference = node.moduleReference;
+            if (reference.kind === 240) {
+                return reference.expression;
+            }
+        }
+        if (node.kind === 236) {
+            return node.moduleSpecifier;
+        }
+        if (node.kind === 225 && node.name.kind === 9) {
+            return node.name;
+        }
+    }
+    ts.getExternalModuleName = getExternalModuleName;
+    function hasQuestionToken(node) {
+        if (node) {
+            switch (node.kind) {
+                case 142:
+                case 147:
+                case 146:
+                case 254:
+                case 253:
+                case 145:
+                case 144:
+                    return node.questionToken !== undefined;
+            }
+        }
+        return false;
+    }
+    ts.hasQuestionToken = hasQuestionToken;
+    function isJSDocConstructSignature(node) {
+        return node.kind === 269 &&
+            node.parameters.length > 0 &&
+            node.parameters[0].type.kind === 271;
+    }
+    ts.isJSDocConstructSignature = isJSDocConstructSignature;
+    function getJSDocTag(node, kind, checkParentVariableStatement) {
+        if (!node) {
+            return undefined;
+        }
+        var jsDocComments = getJSDocComments(node, checkParentVariableStatement);
+        if (!jsDocComments) {
+            return undefined;
+        }
+        for (var _i = 0, jsDocComments_1 = jsDocComments; _i < jsDocComments_1.length; _i++) {
+            var jsDocComment = jsDocComments_1[_i];
+            for (var _a = 0, _b = jsDocComment.tags; _a < _b.length; _a++) {
+                var tag = _b[_a];
+                if (tag.kind === kind) {
+                    return tag;
+                }
+            }
+        }
+    }
+    function getJSDocComments(node, checkParentVariableStatement) {
+        if (node.jsDocComments) {
+            return node.jsDocComments;
+        }
+        if (checkParentVariableStatement) {
+            var isInitializerOfVariableDeclarationInStatement = node.parent.kind === 218 &&
+                node.parent.initializer === node &&
+                node.parent.parent.parent.kind === 200;
+            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent : undefined;
+            if (variableStatementNode) {
+                return variableStatementNode.jsDocComments;
+            }
+            var parent_4 = node.parent;
+            var isSourceOfAssignmentExpressionStatement = parent_4 && parent_4.parent &&
+                parent_4.kind === 187 &&
+                parent_4.operatorToken.kind === 56 &&
+                parent_4.parent.kind === 202;
+            if (isSourceOfAssignmentExpressionStatement) {
+                return parent_4.parent.jsDocComments;
+            }
+            var isPropertyAssignmentExpression = parent_4 && parent_4.kind === 253;
+            if (isPropertyAssignmentExpression) {
+                return parent_4.jsDocComments;
+            }
+        }
+        return undefined;
+    }
+    function getJSDocTypeTag(node) {
+        return getJSDocTag(node, 277, false);
+    }
+    ts.getJSDocTypeTag = getJSDocTypeTag;
+    function getJSDocReturnTag(node) {
+        return getJSDocTag(node, 276, true);
+    }
+    ts.getJSDocReturnTag = getJSDocReturnTag;
+    function getJSDocTemplateTag(node) {
+        return getJSDocTag(node, 278, false);
+    }
+    ts.getJSDocTemplateTag = getJSDocTemplateTag;
+    function getCorrespondingJSDocParameterTag(parameter) {
+        if (parameter.name && parameter.name.kind === 69) {
+            var parameterName = parameter.name.text;
+            var jsDocComments = getJSDocComments(parameter.parent, true);
+            if (jsDocComments) {
+                for (var _i = 0, jsDocComments_2 = jsDocComments; _i < jsDocComments_2.length; _i++) {
+                    var jsDocComment = jsDocComments_2[_i];
+                    for (var _a = 0, _b = jsDocComment.tags; _a < _b.length; _a++) {
+                        var tag = _b[_a];
+                        if (tag.kind === 275) {
+                            var parameterTag = tag;
+                            var name_6 = parameterTag.preParameterName || parameterTag.postParameterName;
+                            if (name_6.text === parameterName) {
+                                return parameterTag;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getCorrespondingJSDocParameterTag = getCorrespondingJSDocParameterTag;
+    function hasRestParameter(s) {
+        return isRestParameter(ts.lastOrUndefined(s.parameters));
+    }
+    ts.hasRestParameter = hasRestParameter;
+    function hasDeclaredRestParameter(s) {
+        return isDeclaredRestParam(ts.lastOrUndefined(s.parameters));
+    }
+    ts.hasDeclaredRestParameter = hasDeclaredRestParameter;
+    function isRestParameter(node) {
+        if (node && (node.flags & 134217728)) {
+            if (node.type && node.type.kind === 270) {
+                return true;
+            }
+            var paramTag = getCorrespondingJSDocParameterTag(node);
+            if (paramTag && paramTag.typeExpression) {
+                return paramTag.typeExpression.type.kind === 270;
+            }
+        }
+        return isDeclaredRestParam(node);
+    }
+    ts.isRestParameter = isRestParameter;
+    function isDeclaredRestParam(node) {
+        return node && node.dotDotDotToken !== undefined;
+    }
+    ts.isDeclaredRestParam = isDeclaredRestParam;
+    function isLiteralKind(kind) {
+        return 8 <= kind && kind <= 11;
+    }
+    ts.isLiteralKind = isLiteralKind;
+    function isTextualLiteralKind(kind) {
+        return kind === 9 || kind === 11;
+    }
+    ts.isTextualLiteralKind = isTextualLiteralKind;
+    function isTemplateLiteralKind(kind) {
+        return 11 <= kind && kind <= 14;
+    }
+    ts.isTemplateLiteralKind = isTemplateLiteralKind;
+    function isBindingPattern(node) {
+        return !!node && (node.kind === 168 || node.kind === 167);
+    }
+    ts.isBindingPattern = isBindingPattern;
+    function isAssignmentTarget(node) {
+        while (node.parent.kind === 178) {
+            node = node.parent;
+        }
+        while (true) {
+            var parent_5 = node.parent;
+            if (parent_5.kind === 170 || parent_5.kind === 191) {
+                node = parent_5;
+                continue;
+            }
+            if (parent_5.kind === 253 || parent_5.kind === 254) {
+                node = parent_5.parent;
+                continue;
+            }
+            return parent_5.kind === 187 &&
+                parent_5.operatorToken.kind === 56 &&
+                parent_5.left === node ||
+                (parent_5.kind === 207 || parent_5.kind === 208) &&
+                    parent_5.initializer === node;
+        }
+    }
+    ts.isAssignmentTarget = isAssignmentTarget;
+    function isNodeDescendentOf(node, ancestor) {
+        while (node) {
+            if (node === ancestor)
+                return true;
+            node = node.parent;
+        }
+        return false;
+    }
+    ts.isNodeDescendentOf = isNodeDescendentOf;
+    function isInAmbientContext(node) {
+        while (node) {
+            if (node.flags & 2 || (node.kind === 256 && node.isDeclarationFile)) {
+                return true;
+            }
+            node = node.parent;
+        }
+        return false;
+    }
+    ts.isInAmbientContext = isInAmbientContext;
+    function isDeclaration(node) {
+        switch (node.kind) {
+            case 180:
+            case 169:
+            case 221:
+            case 192:
+            case 148:
+            case 224:
+            case 255:
+            case 238:
+            case 220:
+            case 179:
+            case 149:
+            case 231:
+            case 229:
+            case 234:
+            case 222:
+            case 147:
+            case 146:
+            case 225:
+            case 232:
+            case 142:
+            case 253:
+            case 145:
+            case 144:
+            case 150:
+            case 254:
+            case 223:
+            case 141:
+            case 218:
+            case 279:
+                return true;
+        }
+        return false;
+    }
+    ts.isDeclaration = isDeclaration;
+    function isStatement(n) {
+        switch (n.kind) {
+            case 210:
+            case 209:
+            case 217:
+            case 204:
+            case 202:
+            case 201:
+            case 207:
+            case 208:
+            case 206:
+            case 203:
+            case 214:
+            case 211:
+            case 213:
+            case 215:
+            case 216:
+            case 200:
+            case 205:
+            case 212:
+            case 235:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isStatement = isStatement;
+    function isClassElement(n) {
+        switch (n.kind) {
+            case 148:
+            case 145:
+            case 147:
+            case 149:
+            case 150:
+            case 146:
+            case 153:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isClassElement = isClassElement;
+    function isDeclarationName(name) {
+        if (name.kind !== 69 && name.kind !== 9 && name.kind !== 8) {
+            return false;
+        }
+        var parent = name.parent;
+        if (parent.kind === 234 || parent.kind === 238) {
+            if (parent.propertyName) {
+                return true;
+            }
+        }
+        if (isDeclaration(parent)) {
+            return parent.name === name;
+        }
+        return false;
+    }
+    ts.isDeclarationName = isDeclarationName;
+    function isLiteralComputedPropertyDeclarationName(node) {
+        return (node.kind === 9 || node.kind === 8) &&
+            node.parent.kind === 140 &&
+            isDeclaration(node.parent.parent);
+    }
+    ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
+    function isIdentifierName(node) {
+        var parent = node.parent;
+        switch (parent.kind) {
+            case 145:
+            case 144:
+            case 147:
+            case 146:
+            case 149:
+            case 150:
+            case 255:
+            case 253:
+            case 172:
+                return parent.name === node;
+            case 139:
+                if (parent.right === node) {
+                    while (parent.kind === 139) {
+                        parent = parent.parent;
+                    }
+                    return parent.kind === 158;
+                }
+                return false;
+            case 169:
+            case 234:
+                return parent.propertyName === node;
+            case 238:
+                return true;
+        }
+        return false;
+    }
+    ts.isIdentifierName = isIdentifierName;
+    function isAliasSymbolDeclaration(node) {
+        return node.kind === 229 ||
+            node.kind === 228 ||
+            node.kind === 231 && !!node.name ||
+            node.kind === 232 ||
+            node.kind === 234 ||
+            node.kind === 238 ||
+            node.kind === 235 && node.expression.kind === 69;
+    }
+    ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
+    function getClassExtendsHeritageClauseElement(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 83);
+        return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
+    }
+    ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
+    function getClassImplementsHeritageClauseElements(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 106);
+        return heritageClause ? heritageClause.types : undefined;
+    }
+    ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
+    function getInterfaceBaseTypeNodes(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 83);
+        return heritageClause ? heritageClause.types : undefined;
+    }
+    ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
+    function getHeritageClause(clauses, kind) {
+        if (clauses) {
+            for (var _i = 0, clauses_1 = clauses; _i < clauses_1.length; _i++) {
+                var clause = clauses_1[_i];
+                if (clause.token === kind) {
+                    return clause;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getHeritageClause = getHeritageClause;
+    function tryResolveScriptReference(host, sourceFile, reference) {
+        if (!host.getCompilerOptions().noResolve) {
+            var referenceFileName = ts.isRootedDiskPath(reference.fileName) ? reference.fileName : ts.combinePaths(ts.getDirectoryPath(sourceFile.fileName), reference.fileName);
+            return host.getSourceFile(referenceFileName);
+        }
+    }
+    ts.tryResolveScriptReference = tryResolveScriptReference;
+    function getAncestor(node, kind) {
+        while (node) {
+            if (node.kind === kind) {
+                return node;
+            }
+            node = node.parent;
+        }
+        return undefined;
+    }
+    ts.getAncestor = getAncestor;
+    function getFileReferenceFromReferencePath(comment, commentRange) {
+        var simpleReferenceRegEx = /^\/\/\/\s*<reference\s+/gim;
+        var isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
+        if (simpleReferenceRegEx.test(comment)) {
+            if (isNoDefaultLibRegEx.test(comment)) {
+                return {
+                    isNoDefaultLib: true
+                };
+            }
+            else {
+                var refMatchResult = ts.fullTripleSlashReferencePathRegEx.exec(comment);
+                var refLibResult = !refMatchResult && ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx.exec(comment);
+                if (refMatchResult || refLibResult) {
+                    var start = commentRange.pos;
+                    var end = commentRange.end;
+                    return {
+                        fileReference: {
+                            pos: start,
+                            end: end,
+                            fileName: (refMatchResult || refLibResult)[3]
+                        },
+                        isNoDefaultLib: false,
+                        isTypeReferenceDirective: !!refLibResult
+                    };
+                }
+                return {
+                    diagnosticMessage: ts.Diagnostics.Invalid_reference_directive_syntax,
+                    isNoDefaultLib: false
+                };
+            }
+        }
+        return undefined;
+    }
+    ts.getFileReferenceFromReferencePath = getFileReferenceFromReferencePath;
+    function isKeyword(token) {
+        return 70 <= token && token <= 138;
+    }
+    ts.isKeyword = isKeyword;
+    function isTrivia(token) {
+        return 2 <= token && token <= 7;
+    }
+    ts.isTrivia = isTrivia;
+    function isAsyncFunctionLike(node) {
+        return isFunctionLike(node) && (node.flags & 256) !== 0 && !isAccessor(node);
+    }
+    ts.isAsyncFunctionLike = isAsyncFunctionLike;
+    function isStringOrNumericLiteral(kind) {
+        return kind === 9 || kind === 8;
+    }
+    ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
+    function hasDynamicName(declaration) {
+        return declaration.name && isDynamicName(declaration.name);
+    }
+    ts.hasDynamicName = hasDynamicName;
+    function isDynamicName(name) {
+        return name.kind === 140 &&
+            !isStringOrNumericLiteral(name.expression.kind) &&
+            !isWellKnownSymbolSyntactically(name.expression);
+    }
+    ts.isDynamicName = isDynamicName;
+    function isWellKnownSymbolSyntactically(node) {
+        return isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
+    }
+    ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
+    function getPropertyNameForPropertyNameNode(name) {
+        if (name.kind === 69 || name.kind === 9 || name.kind === 8 || name.kind === 142) {
+            return name.text;
+        }
+        if (name.kind === 140) {
+            var nameExpression = name.expression;
+            if (isWellKnownSymbolSyntactically(nameExpression)) {
+                var rightHandSideName = nameExpression.name.text;
+                return getPropertyNameForKnownSymbolName(rightHandSideName);
+            }
+            else if (nameExpression.kind === 9 || nameExpression.kind === 8) {
+                return nameExpression.text;
+            }
+        }
+        return undefined;
+    }
+    ts.getPropertyNameForPropertyNameNode = getPropertyNameForPropertyNameNode;
+    function getPropertyNameForKnownSymbolName(symbolName) {
+        return "__@" + symbolName;
+    }
+    ts.getPropertyNameForKnownSymbolName = getPropertyNameForKnownSymbolName;
+    function isESSymbolIdentifier(node) {
+        return node.kind === 69 && node.text === "Symbol";
+    }
+    ts.isESSymbolIdentifier = isESSymbolIdentifier;
+    function isModifierKind(token) {
+        switch (token) {
+            case 115:
+            case 118:
+            case 74:
+            case 122:
+            case 77:
+            case 82:
+            case 112:
+            case 110:
+            case 111:
+            case 128:
+            case 113:
+                return true;
+        }
+        return false;
+    }
+    ts.isModifierKind = isModifierKind;
+    function isParameterDeclaration(node) {
+        var root = getRootDeclaration(node);
+        return root.kind === 142;
+    }
+    ts.isParameterDeclaration = isParameterDeclaration;
+    function getRootDeclaration(node) {
+        while (node.kind === 169) {
+            node = node.parent.parent;
+        }
+        return node;
+    }
+    ts.getRootDeclaration = getRootDeclaration;
+    function nodeStartsNewLexicalEnvironment(n) {
+        return isFunctionLike(n) || n.kind === 225 || n.kind === 256;
+    }
+    ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
+    function cloneNode(node, location, flags, parent) {
+        var clone = location !== undefined
+            ? ts.createNode(node.kind, location.pos, location.end)
+            : createSynthesizedNode(node.kind);
+        for (var key in node) {
+            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
+                continue;
+            }
+            clone[key] = node[key];
+        }
+        if (flags !== undefined) {
+            clone.flags = flags;
+        }
+        if (parent !== undefined) {
+            clone.parent = parent;
+        }
+        return clone;
+    }
+    ts.cloneNode = cloneNode;
+    function cloneEntityName(node, parent) {
+        var clone = cloneNode(node, node, node.flags, parent);
+        if (isQualifiedName(clone)) {
+            var left = clone.left, right = clone.right;
+            clone.left = cloneEntityName(left, clone);
+            clone.right = cloneNode(right, right, right.flags, parent);
+        }
+        return clone;
+    }
+    ts.cloneEntityName = cloneEntityName;
+    function isQualifiedName(node) {
+        return node.kind === 139;
+    }
+    ts.isQualifiedName = isQualifiedName;
+    function nodeIsSynthesized(node) {
+        return node.pos === -1;
+    }
+    ts.nodeIsSynthesized = nodeIsSynthesized;
+    function createSynthesizedNode(kind, startsOnNewLine) {
+        var node = ts.createNode(kind, -1, -1);
+        node.startsOnNewLine = startsOnNewLine;
+        return node;
+    }
+    ts.createSynthesizedNode = createSynthesizedNode;
+    function createSynthesizedNodeArray() {
+        var array = [];
+        array.pos = -1;
+        array.end = -1;
+        return array;
+    }
+    ts.createSynthesizedNodeArray = createSynthesizedNodeArray;
+    function createDiagnosticCollection() {
+        var nonFileDiagnostics = [];
+        var fileDiagnostics = {};
+        var diagnosticsModified = false;
+        var modificationCount = 0;
+        return {
+            add: add,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getDiagnostics: getDiagnostics,
+            getModificationCount: getModificationCount,
+            reattachFileDiagnostics: reattachFileDiagnostics
+        };
+        function getModificationCount() {
+            return modificationCount;
+        }
+        function reattachFileDiagnostics(newFile) {
+            if (!ts.hasProperty(fileDiagnostics, newFile.fileName)) {
+                return;
+            }
+            for (var _i = 0, _a = fileDiagnostics[newFile.fileName]; _i < _a.length; _i++) {
+                var diagnostic = _a[_i];
+                diagnostic.file = newFile;
+            }
+        }
+        function add(diagnostic) {
+            var diagnostics;
+            if (diagnostic.file) {
+                diagnostics = fileDiagnostics[diagnostic.file.fileName];
+                if (!diagnostics) {
+                    diagnostics = [];
+                    fileDiagnostics[diagnostic.file.fileName] = diagnostics;
+                }
+            }
+            else {
+                diagnostics = nonFileDiagnostics;
+            }
+            diagnostics.push(diagnostic);
+            diagnosticsModified = true;
+            modificationCount++;
+        }
+        function getGlobalDiagnostics() {
+            sortAndDeduplicate();
+            return nonFileDiagnostics;
+        }
+        function getDiagnostics(fileName) {
+            sortAndDeduplicate();
+            if (fileName) {
+                return fileDiagnostics[fileName] || [];
+            }
+            var allDiagnostics = [];
+            function pushDiagnostic(d) {
+                allDiagnostics.push(d);
+            }
+            ts.forEach(nonFileDiagnostics, pushDiagnostic);
+            for (var key in fileDiagnostics) {
+                if (ts.hasProperty(fileDiagnostics, key)) {
+                    ts.forEach(fileDiagnostics[key], pushDiagnostic);
+                }
+            }
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function sortAndDeduplicate() {
+            if (!diagnosticsModified) {
+                return;
+            }
+            diagnosticsModified = false;
+            nonFileDiagnostics = ts.sortAndDeduplicateDiagnostics(nonFileDiagnostics);
+            for (var key in fileDiagnostics) {
+                if (ts.hasProperty(fileDiagnostics, key)) {
+                    fileDiagnostics[key] = ts.sortAndDeduplicateDiagnostics(fileDiagnostics[key]);
+                }
+            }
+        }
+    }
+    ts.createDiagnosticCollection = createDiagnosticCollection;
+    var escapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
+    var escapedCharsMap = {
+        "\0": "\\0",
+        "\t": "\\t",
+        "\v": "\\v",
+        "\f": "\\f",
+        "\b": "\\b",
+        "\r": "\\r",
+        "\n": "\\n",
+        "\\": "\\\\",
+        "\"": "\\\"",
+        "\u2028": "\\u2028",
+        "\u2029": "\\u2029",
+        "\u0085": "\\u0085"
+    };
+    function escapeString(s) {
+        s = escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, getReplacement) : s;
+        return s;
+        function getReplacement(c) {
+            return escapedCharsMap[c] || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
+        }
+    }
+    ts.escapeString = escapeString;
+    function isIntrinsicJsxName(name) {
+        var ch = name.substr(0, 1);
+        return ch.toLowerCase() === ch;
+    }
+    ts.isIntrinsicJsxName = isIntrinsicJsxName;
+    function get16BitUnicodeEscapeSequence(charCode) {
+        var hexCharCode = charCode.toString(16).toUpperCase();
+        var paddedHexCode = ("0000" + hexCharCode).slice(-4);
+        return "\\u" + paddedHexCode;
+    }
+    var nonAsciiCharacters = /[^\u0000-\u007F]/g;
+    function escapeNonAsciiCharacters(s) {
+        return nonAsciiCharacters.test(s) ?
+            s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
+            s;
+    }
+    ts.escapeNonAsciiCharacters = escapeNonAsciiCharacters;
+    var indentStrings = ["", "    "];
+    function getIndentString(level) {
+        if (indentStrings[level] === undefined) {
+            indentStrings[level] = getIndentString(level - 1) + indentStrings[1];
+        }
+        return indentStrings[level];
+    }
+    ts.getIndentString = getIndentString;
+    function getIndentSize() {
+        return indentStrings[1].length;
+    }
+    ts.getIndentSize = getIndentSize;
+    function createTextWriter(newLine) {
+        var output;
+        var indent;
+        var lineStart;
+        var lineCount;
+        var linePos;
+        function write(s) {
+            if (s && s.length) {
+                if (lineStart) {
+                    output += getIndentString(indent);
+                    lineStart = false;
+                }
+                output += s;
+            }
+        }
+        function reset() {
+            output = "";
+            indent = 0;
+            lineStart = true;
+            lineCount = 0;
+            linePos = 0;
+        }
+        function rawWrite(s) {
+            if (s !== undefined) {
+                if (lineStart) {
+                    lineStart = false;
+                }
+                output += s;
+            }
+        }
+        function writeLiteral(s) {
+            if (s && s.length) {
+                write(s);
+                var lineStartsOfS = ts.computeLineStarts(s);
+                if (lineStartsOfS.length > 1) {
+                    lineCount = lineCount + lineStartsOfS.length - 1;
+                    linePos = output.length - s.length + ts.lastOrUndefined(lineStartsOfS);
+                }
+            }
+        }
+        function writeLine() {
+            if (!lineStart) {
+                output += newLine;
+                lineCount++;
+                linePos = output.length;
+                lineStart = true;
+            }
+        }
+        function writeTextOfNode(text, node) {
+            write(getTextOfNodeFromSourceText(text, node));
+        }
+        reset();
+        return {
+            write: write,
+            rawWrite: rawWrite,
+            writeTextOfNode: writeTextOfNode,
+            writeLiteral: writeLiteral,
+            writeLine: writeLine,
+            increaseIndent: function () { indent++; },
+            decreaseIndent: function () { indent--; },
+            getIndent: function () { return indent; },
+            getTextPos: function () { return output.length; },
+            getLine: function () { return lineCount + 1; },
+            getColumn: function () { return lineStart ? indent * getIndentSize() + 1 : output.length - linePos + 1; },
+            getText: function () { return output; },
+            reset: reset
+        };
+    }
+    ts.createTextWriter = createTextWriter;
+    function getExternalModuleNameFromPath(host, fileName) {
+        var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
+        var dir = ts.toPath(host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
+        var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
+        var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, false);
+        return ts.removeFileExtension(relativePath);
+    }
+    ts.getExternalModuleNameFromPath = getExternalModuleNameFromPath;
+    function getOwnEmitOutputFilePath(sourceFile, host, extension) {
+        var compilerOptions = host.getCompilerOptions();
+        var emitOutputFilePathWithoutExtension;
+        if (compilerOptions.outDir) {
+            emitOutputFilePathWithoutExtension = ts.removeFileExtension(getSourceFilePathInNewDir(sourceFile, host, compilerOptions.outDir));
+        }
+        else {
+            emitOutputFilePathWithoutExtension = ts.removeFileExtension(sourceFile.fileName);
+        }
+        return emitOutputFilePathWithoutExtension + extension;
+    }
+    ts.getOwnEmitOutputFilePath = getOwnEmitOutputFilePath;
+    function getDeclarationEmitOutputFilePath(sourceFile, host) {
+        var options = host.getCompilerOptions();
+        var outputDir = options.declarationDir || options.outDir;
+        if (options.declaration) {
+            var path = outputDir
+                ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
+                : sourceFile.fileName;
+            return ts.removeFileExtension(path) + ".d.ts";
+        }
+    }
+    ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
+    function getEmitScriptTarget(compilerOptions) {
+        return compilerOptions.target || 0;
+    }
+    ts.getEmitScriptTarget = getEmitScriptTarget;
+    function getEmitModuleKind(compilerOptions) {
+        return typeof compilerOptions.module === "number" ?
+            compilerOptions.module :
+            getEmitScriptTarget(compilerOptions) === 2 ? ts.ModuleKind.ES6 : ts.ModuleKind.CommonJS;
+    }
+    ts.getEmitModuleKind = getEmitModuleKind;
+    function forEachExpectedEmitFile(host, action, targetSourceFile) {
+        var options = host.getCompilerOptions();
+        if (options.outFile || options.out) {
+            onBundledEmit(host);
+        }
+        else {
+            var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
+            for (var _i = 0, sourceFiles_1 = sourceFiles; _i < sourceFiles_1.length; _i++) {
+                var sourceFile = sourceFiles_1[_i];
+                if (!isDeclarationFile(sourceFile)) {
+                    onSingleFileEmit(host, sourceFile);
+                }
+            }
+        }
+        function onSingleFileEmit(host, sourceFile) {
+            var extension = ".js";
+            if (options.jsx === 1) {
+                if (isSourceFileJavaScript(sourceFile)) {
+                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
+                        extension = ".jsx";
+                    }
+                }
+                else if (sourceFile.languageVariant === 1) {
+                    extension = ".jsx";
+                }
+            }
+            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
+            var emitFileNames = {
+                jsFilePath: jsFilePath,
+                sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
+                declarationFilePath: !isSourceFileJavaScript(sourceFile) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined
+            };
+            action(emitFileNames, [sourceFile], false);
+        }
+        function onBundledEmit(host) {
+            var bundledSources = ts.filter(host.getSourceFiles(), function (sourceFile) {
+                return !isDeclarationFile(sourceFile)
+                    && (!ts.isExternalModule(sourceFile) || !!getEmitModuleKind(options));
+            });
+            if (bundledSources.length) {
+                var jsFilePath = options.outFile || options.out;
+                var emitFileNames = {
+                    jsFilePath: jsFilePath,
+                    sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
+                    declarationFilePath: options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined
+                };
+                action(emitFileNames, bundledSources, true);
+            }
+        }
+        function getSourceMapFilePath(jsFilePath, options) {
+            return options.sourceMap ? jsFilePath + ".map" : undefined;
+        }
+    }
+    ts.forEachExpectedEmitFile = forEachExpectedEmitFile;
+    function getSourceFilePathInNewDir(sourceFile, host, newDirPath) {
+        var sourceFilePath = ts.getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
+        sourceFilePath = sourceFilePath.replace(host.getCommonSourceDirectory(), "");
+        return ts.combinePaths(newDirPath, sourceFilePath);
+    }
+    ts.getSourceFilePathInNewDir = getSourceFilePathInNewDir;
+    function writeFile(host, diagnostics, fileName, data, writeByteOrderMark, sourceFiles) {
+        host.writeFile(fileName, data, writeByteOrderMark, function (hostErrorMessage) {
+            diagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Could_not_write_file_0_Colon_1, fileName, hostErrorMessage));
+        }, sourceFiles);
+    }
+    ts.writeFile = writeFile;
+    function getLineOfLocalPosition(currentSourceFile, pos) {
+        return ts.getLineAndCharacterOfPosition(currentSourceFile, pos).line;
+    }
+    ts.getLineOfLocalPosition = getLineOfLocalPosition;
+    function getLineOfLocalPositionFromLineMap(lineMap, pos) {
+        return ts.computeLineAndCharacterOfPosition(lineMap, pos).line;
+    }
+    ts.getLineOfLocalPositionFromLineMap = getLineOfLocalPositionFromLineMap;
+    function getFirstConstructorWithBody(node) {
+        return ts.forEach(node.members, function (member) {
+            if (member.kind === 148 && nodeIsPresent(member.body)) {
+                return member;
+            }
+        });
+    }
+    ts.getFirstConstructorWithBody = getFirstConstructorWithBody;
+    function getSetAccessorTypeAnnotationNode(accessor) {
+        if (accessor && accessor.parameters.length > 0) {
+            var hasThis = accessor.parameters.length === 2 &&
+                accessor.parameters[0].name.kind === 69 &&
+                accessor.parameters[0].name.originalKeywordKind === 97;
+            return accessor.parameters[hasThis ? 1 : 0].type;
+        }
+    }
+    ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
+    function getAllAccessorDeclarations(declarations, accessor) {
+        var firstAccessor;
+        var secondAccessor;
+        var getAccessor;
+        var setAccessor;
+        if (hasDynamicName(accessor)) {
+            firstAccessor = accessor;
+            if (accessor.kind === 149) {
+                getAccessor = accessor;
+            }
+            else if (accessor.kind === 150) {
+                setAccessor = accessor;
+            }
+            else {
+                ts.Debug.fail("Accessor has wrong kind");
+            }
+        }
+        else {
+            ts.forEach(declarations, function (member) {
+                if ((member.kind === 149 || member.kind === 150)
+                    && (member.flags & 32) === (accessor.flags & 32)) {
+                    var memberName = getPropertyNameForPropertyNameNode(member.name);
+                    var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
+                    if (memberName === accessorName) {
+                        if (!firstAccessor) {
+                            firstAccessor = member;
+                        }
+                        else if (!secondAccessor) {
+                            secondAccessor = member;
+                        }
+                        if (member.kind === 149 && !getAccessor) {
+                            getAccessor = member;
+                        }
+                        if (member.kind === 150 && !setAccessor) {
+                            setAccessor = member;
+                        }
+                    }
+                }
+            });
+        }
+        return {
+            firstAccessor: firstAccessor,
+            secondAccessor: secondAccessor,
+            getAccessor: getAccessor,
+            setAccessor: setAccessor
+        };
+    }
+    ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
+    function emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments) {
+        if (leadingComments && leadingComments.length && node.pos !== leadingComments[0].pos &&
+            getLineOfLocalPositionFromLineMap(lineMap, node.pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
+            writer.writeLine();
+        }
+    }
+    ts.emitNewLineBeforeLeadingComments = emitNewLineBeforeLeadingComments;
+    function emitComments(text, lineMap, writer, comments, trailingSeparator, newLine, writeComment) {
+        var emitLeadingSpace = !trailingSeparator;
+        ts.forEach(comments, function (comment) {
+            if (emitLeadingSpace) {
+                writer.write(" ");
+                emitLeadingSpace = false;
+            }
+            writeComment(text, lineMap, writer, comment, newLine);
+            if (comment.hasTrailingNewLine) {
+                writer.writeLine();
+            }
+            else if (trailingSeparator) {
+                writer.write(" ");
+            }
+            else {
+                emitLeadingSpace = true;
+            }
+        });
+    }
+    ts.emitComments = emitComments;
+    function emitDetachedComments(text, lineMap, writer, writeComment, node, newLine, removeComments) {
+        var leadingComments;
+        var currentDetachedCommentInfo;
+        if (removeComments) {
+            if (node.pos === 0) {
+                leadingComments = ts.filter(ts.getLeadingCommentRanges(text, node.pos), isPinnedComment);
+            }
+        }
+        else {
+            leadingComments = ts.getLeadingCommentRanges(text, node.pos);
+        }
+        if (leadingComments) {
+            var detachedComments = [];
+            var lastComment = void 0;
+            for (var _i = 0, leadingComments_1 = leadingComments; _i < leadingComments_1.length; _i++) {
+                var comment = leadingComments_1[_i];
+                if (lastComment) {
+                    var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, lastComment.end);
+                    var commentLine = getLineOfLocalPositionFromLineMap(lineMap, comment.pos);
+                    if (commentLine >= lastCommentLine + 2) {
+                        break;
+                    }
+                }
+                detachedComments.push(comment);
+                lastComment = comment;
+            }
+            if (detachedComments.length) {
+                var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, ts.lastOrUndefined(detachedComments).end);
+                var nodeLine = getLineOfLocalPositionFromLineMap(lineMap, ts.skipTrivia(text, node.pos));
+                if (nodeLine >= lastCommentLine + 2) {
+                    emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments);
+                    emitComments(text, lineMap, writer, detachedComments, true, newLine, writeComment);
+                    currentDetachedCommentInfo = { nodePos: node.pos, detachedCommentEndPos: ts.lastOrUndefined(detachedComments).end };
+                }
+            }
+        }
+        return currentDetachedCommentInfo;
+        function isPinnedComment(comment) {
+            return text.charCodeAt(comment.pos + 1) === 42 &&
+                text.charCodeAt(comment.pos + 2) === 33;
+        }
+    }
+    ts.emitDetachedComments = emitDetachedComments;
+    function writeCommentRange(text, lineMap, writer, comment, newLine) {
+        if (text.charCodeAt(comment.pos + 1) === 42) {
+            var firstCommentLineAndCharacter = ts.computeLineAndCharacterOfPosition(lineMap, comment.pos);
+            var lineCount = lineMap.length;
+            var firstCommentLineIndent = void 0;
+            for (var pos = comment.pos, currentLine = firstCommentLineAndCharacter.line; pos < comment.end; currentLine++) {
+                var nextLineStart = (currentLine + 1) === lineCount
+                    ? text.length + 1
+                    : lineMap[currentLine + 1];
+                if (pos !== comment.pos) {
+                    if (firstCommentLineIndent === undefined) {
+                        firstCommentLineIndent = calculateIndent(text, lineMap[firstCommentLineAndCharacter.line], comment.pos);
+                    }
+                    var currentWriterIndentSpacing = writer.getIndent() * getIndentSize();
+                    var spacesToEmit = currentWriterIndentSpacing - firstCommentLineIndent + calculateIndent(text, pos, nextLineStart);
+                    if (spacesToEmit > 0) {
+                        var numberOfSingleSpacesToEmit = spacesToEmit % getIndentSize();
+                        var indentSizeSpaceString = getIndentString((spacesToEmit - numberOfSingleSpacesToEmit) / getIndentSize());
+                        writer.rawWrite(indentSizeSpaceString);
+                        while (numberOfSingleSpacesToEmit) {
+                            writer.rawWrite(" ");
+                            numberOfSingleSpacesToEmit--;
+                        }
+                    }
+                    else {
+                        writer.rawWrite("");
+                    }
+                }
+                writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart);
+                pos = nextLineStart;
+            }
+        }
+        else {
+            writer.write(text.substring(comment.pos, comment.end));
+        }
+    }
+    ts.writeCommentRange = writeCommentRange;
+    function writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart) {
+        var end = Math.min(comment.end, nextLineStart - 1);
+        var currentLineText = text.substring(pos, end).replace(/^\s+|\s+$/g, "");
+        if (currentLineText) {
+            writer.write(currentLineText);
+            if (end !== comment.end) {
+                writer.writeLine();
+            }
+        }
+        else {
+            writer.writeLiteral(newLine);
+        }
+    }
+    function calculateIndent(text, pos, end) {
+        var currentLineIndent = 0;
+        for (; pos < end && ts.isWhiteSpace(text.charCodeAt(pos)); pos++) {
+            if (text.charCodeAt(pos) === 9) {
+                currentLineIndent += getIndentSize() - (currentLineIndent % getIndentSize());
+            }
+            else {
+                currentLineIndent++;
+            }
+        }
+        return currentLineIndent;
+    }
+    function modifierToFlag(token) {
+        switch (token) {
+            case 113: return 32;
+            case 112: return 4;
+            case 111: return 16;
+            case 110: return 8;
+            case 115: return 128;
+            case 82: return 1;
+            case 122: return 2;
+            case 74: return 2048;
+            case 77: return 512;
+            case 118: return 256;
+            case 128: return 64;
+        }
+        return 0;
+    }
+    ts.modifierToFlag = modifierToFlag;
+    function isLeftHandSideExpression(expr) {
+        if (expr) {
+            switch (expr.kind) {
+                case 172:
+                case 173:
+                case 175:
+                case 174:
+                case 196:
+                case 241:
+                case 242:
+                case 176:
+                case 170:
+                case 178:
+                case 171:
+                case 192:
+                case 179:
+                case 69:
+                case 10:
+                case 8:
+                case 9:
+                case 11:
+                case 189:
+                case 84:
+                case 93:
+                case 97:
+                case 99:
+                case 95:
+                    return true;
+            }
+        }
+        return false;
+    }
+    ts.isLeftHandSideExpression = isLeftHandSideExpression;
+    function isAssignmentOperator(token) {
+        return token >= 56 && token <= 68;
+    }
+    ts.isAssignmentOperator = isAssignmentOperator;
+    function isExpressionWithTypeArgumentsInClassExtendsClause(node) {
+        return node.kind === 194 &&
+            node.parent.token === 83 &&
+            isClassLike(node.parent.parent);
+    }
+    ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
+    function isSupportedExpressionWithTypeArguments(node) {
+        return isSupportedExpressionWithTypeArgumentsRest(node.expression);
+    }
+    ts.isSupportedExpressionWithTypeArguments = isSupportedExpressionWithTypeArguments;
+    function isSupportedExpressionWithTypeArgumentsRest(node) {
+        if (node.kind === 69) {
+            return true;
+        }
+        else if (isPropertyAccessExpression(node)) {
+            return isSupportedExpressionWithTypeArgumentsRest(node.expression);
+        }
+        else {
+            return false;
+        }
+    }
+    function isRightSideOfQualifiedNameOrPropertyAccess(node) {
+        return (node.parent.kind === 139 && node.parent.right === node) ||
+            (node.parent.kind === 172 && node.parent.name === node);
+    }
+    ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
+    function isEmptyObjectLiteralOrArrayLiteral(expression) {
+        var kind = expression.kind;
+        if (kind === 171) {
+            return expression.properties.length === 0;
+        }
+        if (kind === 170) {
+            return expression.elements.length === 0;
+        }
+        return false;
+    }
+    ts.isEmptyObjectLiteralOrArrayLiteral = isEmptyObjectLiteralOrArrayLiteral;
+    function getLocalSymbolForExportDefault(symbol) {
+        return symbol && symbol.valueDeclaration && (symbol.valueDeclaration.flags & 512) ? symbol.valueDeclaration.localSymbol : undefined;
+    }
+    ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
+    function hasJavaScriptFileExtension(fileName) {
+        return ts.forEach(ts.supportedJavascriptExtensions, function (extension) { return ts.fileExtensionIs(fileName, extension); });
+    }
+    ts.hasJavaScriptFileExtension = hasJavaScriptFileExtension;
+    function getExpandedCharCodes(input) {
+        var output = [];
+        var length = input.length;
+        for (var i = 0; i < length; i++) {
+            var charCode = input.charCodeAt(i);
+            if (charCode < 0x80) {
+                output.push(charCode);
+            }
+            else if (charCode < 0x800) {
+                output.push((charCode >> 6) | 192);
+                output.push((charCode & 63) | 128);
+            }
+            else if (charCode < 0x10000) {
+                output.push((charCode >> 12) | 224);
+                output.push(((charCode >> 6) & 63) | 128);
+                output.push((charCode & 63) | 128);
+            }
+            else if (charCode < 0x20000) {
+                output.push((charCode >> 18) | 240);
+                output.push(((charCode >> 12) & 63) | 128);
+                output.push(((charCode >> 6) & 63) | 128);
+                output.push((charCode & 63) | 128);
+            }
+            else {
+                ts.Debug.assert(false, "Unexpected code point");
+            }
+        }
+        return output;
+    }
+    ts.stringify = typeof JSON !== "undefined" && JSON.stringify
+        ? JSON.stringify
+        : stringifyFallback;
+    function stringifyFallback(value) {
+        return value === undefined ? undefined : stringifyValue(value);
+    }
+    function stringifyValue(value) {
+        return typeof value === "string" ? "\"" + escapeString(value) + "\""
+            : typeof value === "number" ? isFinite(value) ? String(value) : "null"
+                : typeof value === "boolean" ? value ? "true" : "false"
+                    : typeof value === "object" && value ? ts.isArray(value) ? cycleCheck(stringifyArray, value) : cycleCheck(stringifyObject, value)
+                        : "null";
+    }
+    function cycleCheck(cb, value) {
+        ts.Debug.assert(!value.hasOwnProperty("__cycle"), "Converting circular structure to JSON");
+        value.__cycle = true;
+        var result = cb(value);
+        delete value.__cycle;
+        return result;
+    }
+    function stringifyArray(value) {
+        return "[" + ts.reduceLeft(value, stringifyElement, "") + "]";
+    }
+    function stringifyElement(memo, value) {
+        return (memo ? memo + "," : memo) + stringifyValue(value);
+    }
+    function stringifyObject(value) {
+        return "{" + ts.reduceProperties(value, stringifyProperty, "") + "}";
+    }
+    function stringifyProperty(memo, value, key) {
+        return value === undefined || typeof value === "function" || key === "__cycle" ? memo
+            : (memo ? memo + "," : memo) + ("\"" + escapeString(key) + "\":" + stringifyValue(value));
+    }
+    var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+    function convertToBase64(input) {
+        var result = "";
+        var charCodes = getExpandedCharCodes(input);
+        var i = 0;
+        var length = charCodes.length;
+        var byte1, byte2, byte3, byte4;
+        while (i < length) {
+            byte1 = charCodes[i] >> 2;
+            byte2 = (charCodes[i] & 3) << 4 | charCodes[i + 1] >> 4;
+            byte3 = (charCodes[i + 1] & 15) << 2 | charCodes[i + 2] >> 6;
+            byte4 = charCodes[i + 2] & 63;
+            if (i + 1 >= length) {
+                byte3 = byte4 = 64;
+            }
+            else if (i + 2 >= length) {
+                byte4 = 64;
+            }
+            result += base64Digits.charAt(byte1) + base64Digits.charAt(byte2) + base64Digits.charAt(byte3) + base64Digits.charAt(byte4);
+            i += 3;
+        }
+        return result;
+    }
+    ts.convertToBase64 = convertToBase64;
+    function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
+        return !ts.isRootedDiskPath(absoluteOrRelativePath)
+            ? absoluteOrRelativePath
+            : ts.getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, false);
+    }
+    ts.convertToRelativePath = convertToRelativePath;
+    var carriageReturnLineFeed = "\r\n";
+    var lineFeed = "\n";
+    function getNewLineCharacter(options) {
+        if (options.newLine === 0) {
+            return carriageReturnLineFeed;
+        }
+        else if (options.newLine === 1) {
+            return lineFeed;
+        }
+        else if (ts.sys) {
+            return ts.sys.newLine;
+        }
+        return carriageReturnLineFeed;
+    }
+    ts.getNewLineCharacter = getNewLineCharacter;
+    function isWatchSet(options) {
+        return options.watch && options.hasOwnProperty("watch");
+    }
+    ts.isWatchSet = isWatchSet;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getDefaultLibFileName(options) {
+        return options.target === 2 ? "lib.es6.d.ts" : "lib.d.ts";
+    }
+    ts.getDefaultLibFileName = getDefaultLibFileName;
+    function textSpanEnd(span) {
+        return span.start + span.length;
+    }
+    ts.textSpanEnd = textSpanEnd;
+    function textSpanIsEmpty(span) {
+        return span.length === 0;
+    }
+    ts.textSpanIsEmpty = textSpanIsEmpty;
+    function textSpanContainsPosition(span, position) {
+        return position >= span.start && position < textSpanEnd(span);
+    }
+    ts.textSpanContainsPosition = textSpanContainsPosition;
+    function textSpanContainsTextSpan(span, other) {
+        return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
+    }
+    ts.textSpanContainsTextSpan = textSpanContainsTextSpan;
+    function textSpanOverlapsWith(span, other) {
+        var overlapStart = Math.max(span.start, other.start);
+        var overlapEnd = Math.min(textSpanEnd(span), textSpanEnd(other));
+        return overlapStart < overlapEnd;
+    }
+    ts.textSpanOverlapsWith = textSpanOverlapsWith;
+    function textSpanOverlap(span1, span2) {
+        var overlapStart = Math.max(span1.start, span2.start);
+        var overlapEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
+        if (overlapStart < overlapEnd) {
+            return createTextSpanFromBounds(overlapStart, overlapEnd);
+        }
+        return undefined;
+    }
+    ts.textSpanOverlap = textSpanOverlap;
+    function textSpanIntersectsWithTextSpan(span, other) {
+        return other.start <= textSpanEnd(span) && textSpanEnd(other) >= span.start;
+    }
+    ts.textSpanIntersectsWithTextSpan = textSpanIntersectsWithTextSpan;
+    function textSpanIntersectsWith(span, start, length) {
+        var end = start + length;
+        return start <= textSpanEnd(span) && end >= span.start;
+    }
+    ts.textSpanIntersectsWith = textSpanIntersectsWith;
+    function decodedTextSpanIntersectsWith(start1, length1, start2, length2) {
+        var end1 = start1 + length1;
+        var end2 = start2 + length2;
+        return start2 <= end1 && end2 >= start1;
+    }
+    ts.decodedTextSpanIntersectsWith = decodedTextSpanIntersectsWith;
+    function textSpanIntersectsWithPosition(span, position) {
+        return position <= textSpanEnd(span) && position >= span.start;
+    }
+    ts.textSpanIntersectsWithPosition = textSpanIntersectsWithPosition;
+    function textSpanIntersection(span1, span2) {
+        var intersectStart = Math.max(span1.start, span2.start);
+        var intersectEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
+        if (intersectStart <= intersectEnd) {
+            return createTextSpanFromBounds(intersectStart, intersectEnd);
+        }
+        return undefined;
+    }
+    ts.textSpanIntersection = textSpanIntersection;
+    function createTextSpan(start, length) {
+        if (start < 0) {
+            throw new Error("start < 0");
+        }
+        if (length < 0) {
+            throw new Error("length < 0");
+        }
+        return { start: start, length: length };
+    }
+    ts.createTextSpan = createTextSpan;
+    function createTextSpanFromBounds(start, end) {
+        return createTextSpan(start, end - start);
+    }
+    ts.createTextSpanFromBounds = createTextSpanFromBounds;
+    function textChangeRangeNewSpan(range) {
+        return createTextSpan(range.span.start, range.newLength);
+    }
+    ts.textChangeRangeNewSpan = textChangeRangeNewSpan;
+    function textChangeRangeIsUnchanged(range) {
+        return textSpanIsEmpty(range.span) && range.newLength === 0;
+    }
+    ts.textChangeRangeIsUnchanged = textChangeRangeIsUnchanged;
+    function createTextChangeRange(span, newLength) {
+        if (newLength < 0) {
+            throw new Error("newLength < 0");
+        }
+        return { span: span, newLength: newLength };
+    }
+    ts.createTextChangeRange = createTextChangeRange;
+    ts.unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
+    function collapseTextChangeRangesAcrossMultipleVersions(changes) {
+        if (changes.length === 0) {
+            return ts.unchangedTextChangeRange;
+        }
+        if (changes.length === 1) {
+            return changes[0];
+        }
+        var change0 = changes[0];
+        var oldStartN = change0.span.start;
+        var oldEndN = textSpanEnd(change0.span);
+        var newEndN = oldStartN + change0.newLength;
+        for (var i = 1; i < changes.length; i++) {
+            var nextChange = changes[i];
+            var oldStart1 = oldStartN;
+            var oldEnd1 = oldEndN;
+            var newEnd1 = newEndN;
+            var oldStart2 = nextChange.span.start;
+            var oldEnd2 = textSpanEnd(nextChange.span);
+            var newEnd2 = oldStart2 + nextChange.newLength;
+            oldStartN = Math.min(oldStart1, oldStart2);
+            oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
+            newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
+        }
+        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), newEndN - oldStartN);
+    }
+    ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
+    function getTypeParameterOwner(d) {
+        if (d && d.kind === 141) {
+            for (var current = d; current; current = current.parent) {
+                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 222) {
+                    return current;
+                }
+            }
+        }
+    }
+    ts.getTypeParameterOwner = getTypeParameterOwner;
+    function isParameterPropertyDeclaration(node) {
+        return node.flags & 92 && node.parent.kind === 148 && ts.isClassLike(node.parent.parent);
+    }
+    ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
+    function startsWith(str, prefix) {
+        return str.lastIndexOf(prefix, 0) === 0;
+    }
+    ts.startsWith = startsWith;
+    function endsWith(str, suffix) {
+        var expectedPos = str.length - suffix.length;
+        return str.indexOf(suffix, expectedPos) === expectedPos;
+    }
+    ts.endsWith = endsWith;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.parseTime = 0;
+    var NodeConstructor;
+    var SourceFileConstructor;
+    function createNode(kind, pos, end) {
+        if (kind === 256) {
+            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
+        }
+        else {
+            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
+        }
+    }
+    ts.createNode = createNode;
+    function visitNode(cbNode, node) {
+        if (node) {
+            return cbNode(node);
+        }
+    }
+    function visitNodeArray(cbNodes, nodes) {
+        if (nodes) {
+            return cbNodes(nodes);
+        }
+    }
+    function visitEachNode(cbNode, nodes) {
+        if (nodes) {
+            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
+                var node = nodes_1[_i];
+                var result = cbNode(node);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+    }
+    function forEachChild(node, cbNode, cbNodeArray) {
+        if (!node) {
+            return;
+        }
+        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
+        var cbNodes = cbNodeArray || cbNode;
+        switch (node.kind) {
+            case 139:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.right);
+            case 141:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.constraint) ||
+                    visitNode(cbNode, node.expression);
+            case 254:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.equalsToken) ||
+                    visitNode(cbNode, node.objectAssignmentInitializer);
+            case 142:
+            case 145:
+            case 144:
+            case 253:
+            case 218:
+            case 169:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.dotDotDotToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.initializer);
+            case 156:
+            case 157:
+            case 151:
+            case 152:
+            case 153:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 147:
+            case 146:
+            case 148:
+            case 149:
+            case 150:
+            case 179:
+            case 220:
+            case 180:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.equalsGreaterThanToken) ||
+                    visitNode(cbNode, node.body);
+            case 155:
+                return visitNode(cbNode, node.typeName) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 154:
+                return visitNode(cbNode, node.parameterName) ||
+                    visitNode(cbNode, node.type);
+            case 158:
+                return visitNode(cbNode, node.exprName);
+            case 159:
+                return visitNodes(cbNodes, node.members);
+            case 160:
+                return visitNode(cbNode, node.elementType);
+            case 161:
+                return visitNodes(cbNodes, node.elementTypes);
+            case 162:
+            case 163:
+                return visitNodes(cbNodes, node.types);
+            case 164:
+                return visitNode(cbNode, node.type);
+            case 167:
+            case 168:
+                return visitNodes(cbNodes, node.elements);
+            case 170:
+                return visitNodes(cbNodes, node.elements);
+            case 171:
+                return visitNodes(cbNodes, node.properties);
+            case 172:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.dotToken) ||
+                    visitNode(cbNode, node.name);
+            case 173:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.argumentExpression);
+            case 174:
+            case 175:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments) ||
+                    visitNodes(cbNodes, node.arguments);
+            case 176:
+                return visitNode(cbNode, node.tag) ||
+                    visitNode(cbNode, node.template);
+            case 177:
+                return visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.expression);
+            case 178:
+                return visitNode(cbNode, node.expression);
+            case 181:
+                return visitNode(cbNode, node.expression);
+            case 182:
+                return visitNode(cbNode, node.expression);
+            case 183:
+                return visitNode(cbNode, node.expression);
+            case 185:
+                return visitNode(cbNode, node.operand);
+            case 190:
+                return visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.expression);
+            case 184:
+                return visitNode(cbNode, node.expression);
+            case 186:
+                return visitNode(cbNode, node.operand);
+            case 187:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.operatorToken) ||
+                    visitNode(cbNode, node.right);
+            case 195:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.type);
+            case 196:
+                return visitNode(cbNode, node.expression);
+            case 188:
+                return visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.whenTrue) ||
+                    visitNode(cbNode, node.colonToken) ||
+                    visitNode(cbNode, node.whenFalse);
+            case 191:
+                return visitNode(cbNode, node.expression);
+            case 199:
+            case 226:
+                return visitNodes(cbNodes, node.statements);
+            case 256:
+                return visitNodes(cbNodes, node.statements) ||
+                    visitNode(cbNode, node.endOfFileToken);
+            case 200:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.declarationList);
+            case 219:
+                return visitNodes(cbNodes, node.declarations);
+            case 202:
+                return visitNode(cbNode, node.expression);
+            case 203:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.thenStatement) ||
+                    visitNode(cbNode, node.elseStatement);
+            case 204:
+                return visitNode(cbNode, node.statement) ||
+                    visitNode(cbNode, node.expression);
+            case 205:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 206:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.incrementor) ||
+                    visitNode(cbNode, node.statement);
+            case 207:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 208:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 209:
+            case 210:
+                return visitNode(cbNode, node.label);
+            case 211:
+                return visitNode(cbNode, node.expression);
+            case 212:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 213:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.caseBlock);
+            case 227:
+                return visitNodes(cbNodes, node.clauses);
+            case 249:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.statements);
+            case 250:
+                return visitNodes(cbNodes, node.statements);
+            case 214:
+                return visitNode(cbNode, node.label) ||
+                    visitNode(cbNode, node.statement);
+            case 215:
+                return visitNode(cbNode, node.expression);
+            case 216:
+                return visitNode(cbNode, node.tryBlock) ||
+                    visitNode(cbNode, node.catchClause) ||
+                    visitNode(cbNode, node.finallyBlock);
+            case 252:
+                return visitNode(cbNode, node.variableDeclaration) ||
+                    visitNode(cbNode, node.block);
+            case 143:
+                return visitNode(cbNode, node.expression);
+            case 221:
+            case 192:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 222:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 223:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNode(cbNode, node.type);
+            case 224:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.members);
+            case 255:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 225:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.body);
+            case 229:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.moduleReference);
+            case 230:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.importClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 231:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.namedBindings);
+            case 228:
+                return visitNode(cbNode, node.name);
+            case 232:
+                return visitNode(cbNode, node.name);
+            case 233:
+            case 237:
+                return visitNodes(cbNodes, node.elements);
+            case 236:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.exportClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 234:
+            case 238:
+                return visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.name);
+            case 235:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.expression);
+            case 189:
+                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
+            case 197:
+                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
+            case 140:
+                return visitNode(cbNode, node.expression);
+            case 251:
+                return visitNodes(cbNodes, node.types);
+            case 194:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 240:
+                return visitNode(cbNode, node.expression);
+            case 239:
+                return visitNodes(cbNodes, node.decorators);
+            case 241:
+                return visitNode(cbNode, node.openingElement) ||
+                    visitNodes(cbNodes, node.children) ||
+                    visitNode(cbNode, node.closingElement);
+            case 242:
+            case 243:
+                return visitNode(cbNode, node.tagName) ||
+                    visitNodes(cbNodes, node.attributes);
+            case 246:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 247:
+                return visitNode(cbNode, node.expression);
+            case 248:
+                return visitNode(cbNode, node.expression);
+            case 245:
+                return visitNode(cbNode, node.tagName);
+            case 257:
+                return visitNode(cbNode, node.type);
+            case 261:
+                return visitNodes(cbNodes, node.types);
+            case 262:
+                return visitNodes(cbNodes, node.types);
+            case 260:
+                return visitNode(cbNode, node.elementType);
+            case 264:
+                return visitNode(cbNode, node.type);
+            case 263:
+                return visitNode(cbNode, node.type);
+            case 265:
+                return visitNodes(cbNodes, node.members);
+            case 267:
+                return visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 268:
+                return visitNode(cbNode, node.type);
+            case 269:
+                return visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 270:
+                return visitNode(cbNode, node.type);
+            case 271:
+                return visitNode(cbNode, node.type);
+            case 272:
+                return visitNode(cbNode, node.type);
+            case 266:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.type);
+            case 273:
+                return visitNodes(cbNodes, node.tags);
+            case 275:
+                return visitNode(cbNode, node.preParameterName) ||
+                    visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.postParameterName);
+            case 276:
+                return visitNode(cbNode, node.typeExpression);
+            case 277:
+                return visitNode(cbNode, node.typeExpression);
+            case 278:
+                return visitNodes(cbNodes, node.typeParameters);
+            case 279:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.jsDocTypeLiteral);
+            case 281:
+                return visitNodes(cbNodes, node.jsDocPropertyTags);
+            case 280:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.name);
+        }
+    }
+    ts.forEachChild = forEachChild;
+    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
+        if (setParentNodes === void 0) { setParentNodes = false; }
+        var start = new Date().getTime();
+        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, undefined, setParentNodes, scriptKind);
+        ts.parseTime += new Date().getTime() - start;
+        return result;
+    }
+    ts.createSourceFile = createSourceFile;
+    function isExternalModule(file) {
+        return file.externalModuleIndicator !== undefined;
+    }
+    ts.isExternalModule = isExternalModule;
+    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+        return IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
+    }
+    ts.updateSourceFile = updateSourceFile;
+    function parseIsolatedJSDocComment(content, start, length) {
+        var result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
+        if (result && result.jsDocComment) {
+            Parser.fixupParentReferences(result.jsDocComment);
+        }
+        return result;
+    }
+    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+    function parseJSDocTypeExpressionForTests(content, start, length) {
+        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
+    }
+    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+    var Parser;
+    (function (Parser) {
+        var scanner = ts.createScanner(2, true);
+        var disallowInAndDecoratorContext = 4194304 | 16777216;
+        var NodeConstructor;
+        var SourceFileConstructor;
+        var sourceFile;
+        var parseDiagnostics;
+        var syntaxCursor;
+        var token;
+        var sourceText;
+        var nodeCount;
+        var identifiers;
+        var identifierCount;
+        var parsingContext;
+        var contextFlags;
+        var parseErrorBeforeNextFinishedNode = false;
+        function parseSourceFile(fileName, _sourceText, languageVersion, _syntaxCursor, setParentNodes, scriptKind) {
+            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
+            initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind);
+            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
+            clearState();
+            return result;
+        }
+        Parser.parseSourceFile = parseSourceFile;
+        function getLanguageVariant(scriptKind) {
+            return scriptKind === 4 || scriptKind === 2 || scriptKind === 1 ? 1 : 0;
+        }
+        function initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind) {
+            NodeConstructor = ts.objectAllocator.getNodeConstructor();
+            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
+            sourceText = _sourceText;
+            syntaxCursor = _syntaxCursor;
+            parseDiagnostics = [];
+            parsingContext = 0;
+            identifiers = {};
+            identifierCount = 0;
+            nodeCount = 0;
+            contextFlags = scriptKind === 1 || scriptKind === 2 ? 134217728 : 0;
+            parseErrorBeforeNextFinishedNode = false;
+            scanner.setText(sourceText);
+            scanner.setOnError(scanError);
+            scanner.setScriptTarget(languageVersion);
+            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
+        }
+        function clearState() {
+            scanner.setText("");
+            scanner.setOnError(undefined);
+            parseDiagnostics = undefined;
+            sourceFile = undefined;
+            identifiers = undefined;
+            syntaxCursor = undefined;
+            sourceText = undefined;
+        }
+        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
+            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
+            sourceFile.flags = contextFlags;
+            token = nextToken();
+            processReferenceComments(sourceFile);
+            sourceFile.statements = parseList(0, parseStatement);
+            ts.Debug.assert(token === 1);
+            sourceFile.endOfFileToken = parseTokenNode();
+            setExternalModuleIndicator(sourceFile);
+            sourceFile.nodeCount = nodeCount;
+            sourceFile.identifierCount = identifierCount;
+            sourceFile.identifiers = identifiers;
+            sourceFile.parseDiagnostics = parseDiagnostics;
+            if (setParentNodes) {
+                fixupParentReferences(sourceFile);
+            }
+            return sourceFile;
+        }
+        function addJSDocComment(node) {
+            if (contextFlags & 134217728) {
+                var comments = ts.getLeadingCommentRangesOfNode(node, sourceFile);
+                if (comments) {
+                    for (var _i = 0, comments_1 = comments; _i < comments_1.length; _i++) {
+                        var comment = comments_1[_i];
+                        var jsDocComment = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
+                        if (!jsDocComment) {
+                            continue;
+                        }
+                        if (!node.jsDocComments) {
+                            node.jsDocComments = [];
+                        }
+                        node.jsDocComments.push(jsDocComment);
+                    }
+                }
+            }
+            return node;
+        }
+        function fixupParentReferences(rootNode) {
+            var parent = rootNode;
+            forEachChild(rootNode, visitNode);
+            return;
+            function visitNode(n) {
+                if (n.parent !== parent) {
+                    n.parent = parent;
+                    var saveParent = parent;
+                    parent = n;
+                    forEachChild(n, visitNode);
+                    if (n.jsDocComments) {
+                        for (var _i = 0, _a = n.jsDocComments; _i < _a.length; _i++) {
+                            var jsDocComment = _a[_i];
+                            jsDocComment.parent = n;
+                            parent = jsDocComment;
+                            forEachChild(jsDocComment, visitNode);
+                        }
+                    }
+                    parent = saveParent;
+                }
+            }
+        }
+        Parser.fixupParentReferences = fixupParentReferences;
+        function createSourceFile(fileName, languageVersion, scriptKind) {
+            var sourceFile = new SourceFileConstructor(256, 0, sourceText.length);
+            nodeCount++;
+            sourceFile.text = sourceText;
+            sourceFile.bindDiagnostics = [];
+            sourceFile.languageVersion = languageVersion;
+            sourceFile.fileName = ts.normalizePath(fileName);
+            sourceFile.languageVariant = getLanguageVariant(scriptKind);
+            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts");
+            sourceFile.scriptKind = scriptKind;
+            return sourceFile;
+        }
+        function setContextFlag(val, flag) {
+            if (val) {
+                contextFlags |= flag;
+            }
+            else {
+                contextFlags &= ~flag;
+            }
+        }
+        function setDisallowInContext(val) {
+            setContextFlag(val, 4194304);
+        }
+        function setYieldContext(val) {
+            setContextFlag(val, 8388608);
+        }
+        function setDecoratorContext(val) {
+            setContextFlag(val, 16777216);
+        }
+        function setAwaitContext(val) {
+            setContextFlag(val, 33554432);
+        }
+        function doOutsideOfContext(context, func) {
+            var contextFlagsToClear = context & contextFlags;
+            if (contextFlagsToClear) {
+                setContextFlag(false, contextFlagsToClear);
+                var result = func();
+                setContextFlag(true, contextFlagsToClear);
+                return result;
+            }
+            return func();
+        }
+        function doInsideOfContext(context, func) {
+            var contextFlagsToSet = context & ~contextFlags;
+            if (contextFlagsToSet) {
+                setContextFlag(true, contextFlagsToSet);
+                var result = func();
+                setContextFlag(false, contextFlagsToSet);
+                return result;
+            }
+            return func();
+        }
+        function allowInAnd(func) {
+            return doOutsideOfContext(4194304, func);
+        }
+        function disallowInAnd(func) {
+            return doInsideOfContext(4194304, func);
+        }
+        function doInYieldContext(func) {
+            return doInsideOfContext(8388608, func);
+        }
+        function doInDecoratorContext(func) {
+            return doInsideOfContext(16777216, func);
+        }
+        function doInAwaitContext(func) {
+            return doInsideOfContext(33554432, func);
+        }
+        function doOutsideOfAwaitContext(func) {
+            return doOutsideOfContext(33554432, func);
+        }
+        function doInYieldAndAwaitContext(func) {
+            return doInsideOfContext(8388608 | 33554432, func);
+        }
+        function inContext(flags) {
+            return (contextFlags & flags) !== 0;
+        }
+        function inYieldContext() {
+            return inContext(8388608);
+        }
+        function inDisallowInContext() {
+            return inContext(4194304);
+        }
+        function inDecoratorContext() {
+            return inContext(16777216);
+        }
+        function inAwaitContext() {
+            return inContext(33554432);
+        }
+        function parseErrorAtCurrentToken(message, arg0) {
+            var start = scanner.getTokenPos();
+            var length = scanner.getTextPos() - start;
+            parseErrorAtPosition(start, length, message, arg0);
+        }
+        function parseErrorAtPosition(start, length, message, arg0) {
+            var lastError = ts.lastOrUndefined(parseDiagnostics);
+            if (!lastError || start !== lastError.start) {
+                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
+            }
+            parseErrorBeforeNextFinishedNode = true;
+        }
+        function scanError(message, length) {
+            var pos = scanner.getTextPos();
+            parseErrorAtPosition(pos, length || 0, message);
+        }
+        function getNodePos() {
+            return scanner.getStartPos();
+        }
+        function getNodeEnd() {
+            return scanner.getStartPos();
+        }
+        function nextToken() {
+            return token = scanner.scan();
+        }
+        function reScanGreaterToken() {
+            return token = scanner.reScanGreaterToken();
+        }
+        function reScanSlashToken() {
+            return token = scanner.reScanSlashToken();
+        }
+        function reScanTemplateToken() {
+            return token = scanner.reScanTemplateToken();
+        }
+        function scanJsxIdentifier() {
+            return token = scanner.scanJsxIdentifier();
+        }
+        function scanJsxText() {
+            return token = scanner.scanJsxToken();
+        }
+        function speculationHelper(callback, isLookAhead) {
+            var saveToken = token;
+            var saveParseDiagnosticsLength = parseDiagnostics.length;
+            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+            var saveContextFlags = contextFlags;
+            var result = isLookAhead
+                ? scanner.lookAhead(callback)
+                : scanner.tryScan(callback);
+            ts.Debug.assert(saveContextFlags === contextFlags);
+            if (!result || isLookAhead) {
+                token = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+            }
+            return result;
+        }
+        function lookAhead(callback) {
+            return speculationHelper(callback, true);
+        }
+        function tryParse(callback) {
+            return speculationHelper(callback, false);
+        }
+        function isIdentifier() {
+            if (token === 69) {
+                return true;
+            }
+            if (token === 114 && inYieldContext()) {
+                return false;
+            }
+            if (token === 119 && inAwaitContext()) {
+                return false;
+            }
+            return token > 105;
+        }
+        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
+            if (shouldAdvance === void 0) { shouldAdvance = true; }
+            if (token === kind) {
+                if (shouldAdvance) {
+                    nextToken();
+                }
+                return true;
+            }
+            if (diagnosticMessage) {
+                parseErrorAtCurrentToken(diagnosticMessage);
+            }
+            else {
+                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
+            }
+            return false;
+        }
+        function parseOptional(t) {
+            if (token === t) {
+                nextToken();
+                return true;
+            }
+            return false;
+        }
+        function parseOptionalToken(t) {
+            if (token === t) {
+                return parseTokenNode();
+            }
+            return undefined;
+        }
+        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            return parseOptionalToken(t) ||
+                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
+        }
+        function parseTokenNode() {
+            var node = createNode(token);
+            nextToken();
+            return finishNode(node);
+        }
+        function canParseSemicolon() {
+            if (token === 23) {
+                return true;
+            }
+            return token === 16 || token === 1 || scanner.hasPrecedingLineBreak();
+        }
+        function parseSemicolon() {
+            if (canParseSemicolon()) {
+                if (token === 23) {
+                    nextToken();
+                }
+                return true;
+            }
+            else {
+                return parseExpected(23);
+            }
+        }
+        function createNode(kind, pos) {
+            nodeCount++;
+            if (!(pos >= 0)) {
+                pos = scanner.getStartPos();
+            }
+            return new NodeConstructor(kind, pos, pos);
+        }
+        function finishNode(node, end) {
+            node.end = end === undefined ? scanner.getStartPos() : end;
+            if (contextFlags) {
+                node.flags |= contextFlags;
+            }
+            if (parseErrorBeforeNextFinishedNode) {
+                parseErrorBeforeNextFinishedNode = false;
+                node.flags |= 67108864;
+            }
+            return node;
+        }
+        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            if (reportAtCurrentPosition) {
+                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
+            }
+            else {
+                parseErrorAtCurrentToken(diagnosticMessage, arg0);
+            }
+            var result = createNode(kind, scanner.getStartPos());
+            result.text = "";
+            return finishNode(result);
+        }
+        function internIdentifier(text) {
+            text = ts.escapeIdentifier(text);
+            return ts.hasProperty(identifiers, text) ? identifiers[text] : (identifiers[text] = text);
+        }
+        function createIdentifier(isIdentifier, diagnosticMessage) {
+            identifierCount++;
+            if (isIdentifier) {
+                var node = createNode(69);
+                if (token !== 69) {
+                    node.originalKeywordKind = token;
+                }
+                node.text = internIdentifier(scanner.getTokenValue());
+                nextToken();
+                return finishNode(node);
+            }
+            return createMissingNode(69, false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
+        }
+        function parseIdentifier(diagnosticMessage) {
+            return createIdentifier(isIdentifier(), diagnosticMessage);
+        }
+        function parseIdentifierName() {
+            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token));
+        }
+        function isLiteralPropertyName() {
+            return ts.tokenIsIdentifierOrKeyword(token) ||
+                token === 9 ||
+                token === 8;
+        }
+        function parsePropertyNameWorker(allowComputedPropertyNames) {
+            if (token === 9 || token === 8) {
+                return parseLiteralNode(true);
+            }
+            if (allowComputedPropertyNames && token === 19) {
+                return parseComputedPropertyName();
+            }
+            return parseIdentifierName();
+        }
+        function parsePropertyName() {
+            return parsePropertyNameWorker(true);
+        }
+        function parseSimplePropertyName() {
+            return parsePropertyNameWorker(false);
+        }
+        function isSimplePropertyName() {
+            return token === 9 || token === 8 || ts.tokenIsIdentifierOrKeyword(token);
+        }
+        function parseComputedPropertyName() {
+            var node = createNode(140);
+            parseExpected(19);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20);
+            return finishNode(node);
+        }
+        function parseContextualModifier(t) {
+            return token === t && tryParse(nextTokenCanFollowModifier);
+        }
+        function nextTokenIsOnSameLineAndCanFollowModifier() {
+            nextToken();
+            if (scanner.hasPrecedingLineBreak()) {
+                return false;
+            }
+            return canFollowModifier();
+        }
+        function nextTokenCanFollowModifier() {
+            if (token === 74) {
+                return nextToken() === 81;
+            }
+            if (token === 82) {
+                nextToken();
+                if (token === 77) {
+                    return lookAhead(nextTokenIsClassOrFunction);
+                }
+                return token !== 37 && token !== 116 && token !== 15 && canFollowModifier();
+            }
+            if (token === 77) {
+                return nextTokenIsClassOrFunction();
+            }
+            if (token === 113) {
+                nextToken();
+                return canFollowModifier();
+            }
+            return nextTokenIsOnSameLineAndCanFollowModifier();
+        }
+        function parseAnyContextualModifier() {
+            return ts.isModifierKind(token) && tryParse(nextTokenCanFollowModifier);
+        }
+        function canFollowModifier() {
+            return token === 19
+                || token === 15
+                || token === 37
+                || isLiteralPropertyName();
+        }
+        function nextTokenIsClassOrFunction() {
+            nextToken();
+            return token === 73 || token === 87;
+        }
+        function isListElement(parsingContext, inErrorRecovery) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return true;
+            }
+            switch (parsingContext) {
+                case 0:
+                case 1:
+                case 3:
+                    return !(token === 23 && inErrorRecovery) && isStartOfStatement();
+                case 2:
+                    return token === 71 || token === 77;
+                case 4:
+                    return lookAhead(isTypeMemberStart);
+                case 5:
+                    return lookAhead(isClassMemberStart) || (token === 23 && !inErrorRecovery);
+                case 6:
+                    return token === 19 || isLiteralPropertyName();
+                case 12:
+                    return token === 19 || token === 37 || isLiteralPropertyName();
+                case 9:
+                    return token === 19 || isLiteralPropertyName();
+                case 7:
+                    if (token === 15) {
+                        return lookAhead(isValidHeritageClauseObjectLiteral);
+                    }
+                    if (!inErrorRecovery) {
+                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    }
+                    else {
+                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    }
+                case 8:
+                    return isIdentifierOrPattern();
+                case 10:
+                    return token === 24 || token === 22 || isIdentifierOrPattern();
+                case 17:
+                    return isIdentifier();
+                case 11:
+                case 15:
+                    return token === 24 || token === 22 || isStartOfExpression();
+                case 16:
+                    return isStartOfParameter();
+                case 18:
+                case 19:
+                    return token === 24 || isStartOfType();
+                case 20:
+                    return isHeritageClause();
+                case 21:
+                    return ts.tokenIsIdentifierOrKeyword(token);
+                case 13:
+                    return ts.tokenIsIdentifierOrKeyword(token) || token === 15;
+                case 14:
+                    return true;
+                case 22:
+                case 23:
+                case 25:
+                    return JSDocParser.isJSDocType();
+                case 24:
+                    return isSimplePropertyName();
+            }
+            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
+        }
+        function isValidHeritageClauseObjectLiteral() {
+            ts.Debug.assert(token === 15);
+            if (nextToken() === 16) {
+                var next = nextToken();
+                return next === 24 || next === 15 || next === 83 || next === 106;
+            }
+            return true;
+        }
+        function nextTokenIsIdentifier() {
+            nextToken();
+            return isIdentifier();
+        }
+        function nextTokenIsIdentifierOrKeyword() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token);
+        }
+        function isHeritageClauseExtendsOrImplementsKeyword() {
+            if (token === 106 ||
+                token === 83) {
+                return lookAhead(nextTokenIsStartOfExpression);
+            }
+            return false;
+        }
+        function nextTokenIsStartOfExpression() {
+            nextToken();
+            return isStartOfExpression();
+        }
+        function isListTerminator(kind) {
+            if (token === 1) {
+                return true;
+            }
+            switch (kind) {
+                case 1:
+                case 2:
+                case 4:
+                case 5:
+                case 6:
+                case 12:
+                case 9:
+                case 21:
+                    return token === 16;
+                case 3:
+                    return token === 16 || token === 71 || token === 77;
+                case 7:
+                    return token === 15 || token === 83 || token === 106;
+                case 8:
+                    return isVariableDeclaratorListTerminator();
+                case 17:
+                    return token === 27 || token === 17 || token === 15 || token === 83 || token === 106;
+                case 11:
+                    return token === 18 || token === 23;
+                case 15:
+                case 19:
+                case 10:
+                    return token === 20;
+                case 16:
+                    return token === 18 || token === 20;
+                case 18:
+                    return token === 27 || token === 17;
+                case 20:
+                    return token === 15 || token === 16;
+                case 13:
+                    return token === 27 || token === 39;
+                case 14:
+                    return token === 25 && lookAhead(nextTokenIsSlash);
+                case 22:
+                    return token === 18 || token === 54 || token === 16;
+                case 23:
+                    return token === 27 || token === 16;
+                case 25:
+                    return token === 20 || token === 16;
+                case 24:
+                    return token === 16;
+            }
+        }
+        function isVariableDeclaratorListTerminator() {
+            if (canParseSemicolon()) {
+                return true;
+            }
+            if (isInOrOfKeyword(token)) {
+                return true;
+            }
+            if (token === 34) {
+                return true;
+            }
+            return false;
+        }
+        function isInSomeParsingContext() {
+            for (var kind = 0; kind < 26; kind++) {
+                if (parsingContext & (1 << kind)) {
+                    if (isListElement(kind, true) || isListTerminator(kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function parseList(kind, parseElement) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = [];
+            result.pos = getNodePos();
+            while (!isListTerminator(kind)) {
+                if (isListElement(kind, false)) {
+                    var element = parseListElement(kind, parseElement);
+                    result.push(element);
+                    continue;
+                }
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
+                }
+            }
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function parseListElement(parsingContext, parseElement) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return consumeNode(node);
+            }
+            return parseElement();
+        }
+        function currentNode(parsingContext) {
+            if (parseErrorBeforeNextFinishedNode) {
+                return undefined;
+            }
+            if (!syntaxCursor) {
+                return undefined;
+            }
+            var node = syntaxCursor.currentNode(scanner.getStartPos());
+            if (ts.nodeIsMissing(node)) {
+                return undefined;
+            }
+            if (node.intersectsChange) {
+                return undefined;
+            }
+            if (ts.containsParseError(node)) {
+                return undefined;
+            }
+            var nodeContextFlags = node.flags & 197132288;
+            if (nodeContextFlags !== contextFlags) {
+                return undefined;
+            }
+            if (!canReuseNode(node, parsingContext)) {
+                return undefined;
+            }
+            return node;
+        }
+        function consumeNode(node) {
+            scanner.setTextPos(node.end);
+            nextToken();
+            return node;
+        }
+        function canReuseNode(node, parsingContext) {
+            switch (parsingContext) {
+                case 5:
+                    return isReusableClassMember(node);
+                case 2:
+                    return isReusableSwitchClause(node);
+                case 0:
+                case 1:
+                case 3:
+                    return isReusableStatement(node);
+                case 6:
+                    return isReusableEnumMember(node);
+                case 4:
+                    return isReusableTypeMember(node);
+                case 8:
+                    return isReusableVariableDeclaration(node);
+                case 16:
+                    return isReusableParameter(node);
+                case 20:
+                case 17:
+                case 19:
+                case 18:
+                case 11:
+                case 12:
+                case 7:
+                case 13:
+                case 14:
+            }
+            return false;
+        }
+        function isReusableClassMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 148:
+                    case 153:
+                    case 149:
+                    case 150:
+                    case 145:
+                    case 198:
+                        return true;
+                    case 147:
+                        var methodDeclaration = node;
+                        var nameIsConstructor = methodDeclaration.name.kind === 69 &&
+                            methodDeclaration.name.originalKeywordKind === 121;
+                        return !nameIsConstructor;
+                }
+            }
+            return false;
+        }
+        function isReusableSwitchClause(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 249:
+                    case 250:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableStatement(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 220:
+                    case 200:
+                    case 199:
+                    case 203:
+                    case 202:
+                    case 215:
+                    case 211:
+                    case 213:
+                    case 210:
+                    case 209:
+                    case 207:
+                    case 208:
+                    case 206:
+                    case 205:
+                    case 212:
+                    case 201:
+                    case 216:
+                    case 214:
+                    case 204:
+                    case 217:
+                    case 230:
+                    case 229:
+                    case 236:
+                    case 235:
+                    case 225:
+                    case 221:
+                    case 222:
+                    case 224:
+                    case 223:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableEnumMember(node) {
+            return node.kind === 255;
+        }
+        function isReusableTypeMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 152:
+                    case 146:
+                    case 153:
+                    case 144:
+                    case 151:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableVariableDeclaration(node) {
+            if (node.kind !== 218) {
+                return false;
+            }
+            var variableDeclarator = node;
+            return variableDeclarator.initializer === undefined;
+        }
+        function isReusableParameter(node) {
+            if (node.kind !== 142) {
+                return false;
+            }
+            var parameter = node;
+            return parameter.initializer === undefined;
+        }
+        function abortParsingListOrMoveToNextToken(kind) {
+            parseErrorAtCurrentToken(parsingContextErrors(kind));
+            if (isInSomeParsingContext()) {
+                return true;
+            }
+            nextToken();
+            return false;
+        }
+        function parsingContextErrors(context) {
+            switch (context) {
+                case 0: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 1: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 2: return ts.Diagnostics.case_or_default_expected;
+                case 3: return ts.Diagnostics.Statement_expected;
+                case 4: return ts.Diagnostics.Property_or_signature_expected;
+                case 5: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
+                case 6: return ts.Diagnostics.Enum_member_expected;
+                case 7: return ts.Diagnostics.Expression_expected;
+                case 8: return ts.Diagnostics.Variable_declaration_expected;
+                case 9: return ts.Diagnostics.Property_destructuring_pattern_expected;
+                case 10: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
+                case 11: return ts.Diagnostics.Argument_expression_expected;
+                case 12: return ts.Diagnostics.Property_assignment_expected;
+                case 15: return ts.Diagnostics.Expression_or_comma_expected;
+                case 16: return ts.Diagnostics.Parameter_declaration_expected;
+                case 17: return ts.Diagnostics.Type_parameter_declaration_expected;
+                case 18: return ts.Diagnostics.Type_argument_expected;
+                case 19: return ts.Diagnostics.Type_expected;
+                case 20: return ts.Diagnostics.Unexpected_token_expected;
+                case 21: return ts.Diagnostics.Identifier_expected;
+                case 13: return ts.Diagnostics.Identifier_expected;
+                case 14: return ts.Diagnostics.Identifier_expected;
+                case 22: return ts.Diagnostics.Parameter_declaration_expected;
+                case 23: return ts.Diagnostics.Type_argument_expected;
+                case 25: return ts.Diagnostics.Type_expected;
+                case 24: return ts.Diagnostics.Property_assignment_expected;
+            }
+        }
+        ;
+        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = [];
+            result.pos = getNodePos();
+            var commaStart = -1;
+            while (true) {
+                if (isListElement(kind, false)) {
+                    result.push(parseListElement(kind, parseElement));
+                    commaStart = scanner.getTokenPos();
+                    if (parseOptional(24)) {
+                        continue;
+                    }
+                    commaStart = -1;
+                    if (isListTerminator(kind)) {
+                        break;
+                    }
+                    parseExpected(24);
+                    if (considerSemicolonAsDelimiter && token === 23 && !scanner.hasPrecedingLineBreak()) {
+                        nextToken();
+                    }
+                    continue;
+                }
+                if (isListTerminator(kind)) {
+                    break;
+                }
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
+                }
+            }
+            if (commaStart >= 0) {
+                result.hasTrailingComma = true;
+            }
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function createMissingList() {
+            var pos = getNodePos();
+            var result = [];
+            result.pos = pos;
+            result.end = pos;
+            return result;
+        }
+        function parseBracketedList(kind, parseElement, open, close) {
+            if (parseExpected(open)) {
+                var result = parseDelimitedList(kind, parseElement);
+                parseExpected(close);
+                return result;
+            }
+            return createMissingList();
+        }
+        function parseEntityName(allowReservedWords, diagnosticMessage) {
+            var entity = parseIdentifier(diagnosticMessage);
+            while (parseOptional(21)) {
+                var node = createNode(139, entity.pos);
+                node.left = entity;
+                node.right = parseRightSideOfDot(allowReservedWords);
+                entity = finishNode(node);
+            }
+            return entity;
+        }
+        function parseRightSideOfDot(allowIdentifierNames) {
+            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token)) {
+                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                if (matchesPattern) {
+                    return createMissingNode(69, true, ts.Diagnostics.Identifier_expected);
+                }
+            }
+            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
+        }
+        function parseTemplateExpression() {
+            var template = createNode(189);
+            template.head = parseTemplateLiteralFragment();
+            ts.Debug.assert(template.head.kind === 12, "Template head has wrong token kind");
+            var templateSpans = [];
+            templateSpans.pos = getNodePos();
+            do {
+                templateSpans.push(parseTemplateSpan());
+            } while (ts.lastOrUndefined(templateSpans).literal.kind === 13);
+            templateSpans.end = getNodeEnd();
+            template.templateSpans = templateSpans;
+            return finishNode(template);
+        }
+        function parseTemplateSpan() {
+            var span = createNode(197);
+            span.expression = allowInAnd(parseExpression);
+            var literal;
+            if (token === 16) {
+                reScanTemplateToken();
+                literal = parseTemplateLiteralFragment();
+            }
+            else {
+                literal = parseExpectedToken(14, false, ts.Diagnostics._0_expected, ts.tokenToString(16));
+            }
+            span.literal = literal;
+            return finishNode(span);
+        }
+        function parseStringLiteralTypeNode() {
+            return parseLiteralLikeNode(166, true);
+        }
+        function parseLiteralNode(internName) {
+            return parseLiteralLikeNode(token, internName);
+        }
+        function parseTemplateLiteralFragment() {
+            return parseLiteralLikeNode(token, false);
+        }
+        function parseLiteralLikeNode(kind, internName) {
+            var node = createNode(kind);
+            var text = scanner.getTokenValue();
+            node.text = internName ? internIdentifier(text) : text;
+            if (scanner.hasExtendedUnicodeEscape()) {
+                node.hasExtendedUnicodeEscape = true;
+            }
+            if (scanner.isUnterminated()) {
+                node.isUnterminated = true;
+            }
+            var tokenPos = scanner.getTokenPos();
+            nextToken();
+            finishNode(node);
+            if (node.kind === 8
+                && sourceText.charCodeAt(tokenPos) === 48
+                && ts.isOctalDigit(sourceText.charCodeAt(tokenPos + 1))) {
+                node.isOctalLiteral = true;
+            }
+            return node;
+        }
+        function parseTypeReference() {
+            var typeName = parseEntityName(false, ts.Diagnostics.Type_expected);
+            var node = createNode(155, typeName.pos);
+            node.typeName = typeName;
+            if (!scanner.hasPrecedingLineBreak() && token === 25) {
+                node.typeArguments = parseBracketedList(18, parseType, 25, 27);
+            }
+            return finishNode(node);
+        }
+        function parseThisTypePredicate(lhs) {
+            nextToken();
+            var node = createNode(154, lhs.pos);
+            node.parameterName = lhs;
+            node.type = parseType();
+            return finishNode(node);
+        }
+        function parseThisTypeNode() {
+            var node = createNode(165);
+            nextToken();
+            return finishNode(node);
+        }
+        function parseTypeQuery() {
+            var node = createNode(158);
+            parseExpected(101);
+            node.exprName = parseEntityName(true);
+            return finishNode(node);
+        }
+        function parseTypeParameter() {
+            var node = createNode(141);
+            node.name = parseIdentifier();
+            if (parseOptional(83)) {
+                if (isStartOfType() || !isStartOfExpression()) {
+                    node.constraint = parseType();
+                }
+                else {
+                    node.expression = parseUnaryExpressionOrHigher();
+                }
+            }
+            return finishNode(node);
+        }
+        function parseTypeParameters() {
+            if (token === 25) {
+                return parseBracketedList(17, parseTypeParameter, 25, 27);
+            }
+        }
+        function parseParameterType() {
+            if (parseOptional(54)) {
+                return parseType();
+            }
+            return undefined;
+        }
+        function isStartOfParameter() {
+            return token === 22 || isIdentifierOrPattern() || ts.isModifierKind(token) || token === 55 || token === 97;
+        }
+        function setModifiers(node, modifiers) {
+            if (modifiers) {
+                node.flags |= modifiers.flags;
+                node.modifiers = modifiers;
+            }
+        }
+        function parseParameter() {
+            var node = createNode(142);
+            if (token === 97) {
+                node.name = createIdentifier(true, undefined);
+                node.type = parseParameterType();
+                return finishNode(node);
+            }
+            node.decorators = parseDecorators();
+            setModifiers(node, parseModifiers());
+            node.dotDotDotToken = parseOptionalToken(22);
+            node.name = parseIdentifierOrPattern();
+            if (ts.getFullWidth(node.name) === 0 && node.flags === 0 && ts.isModifierKind(token)) {
+                nextToken();
+            }
+            node.questionToken = parseOptionalToken(53);
+            node.type = parseParameterType();
+            node.initializer = parseBindingElementInitializer(true);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseBindingElementInitializer(inParameter) {
+            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
+        }
+        function parseParameterInitializer() {
+            return parseInitializer(true);
+        }
+        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
+            var returnTokenRequired = returnToken === 34;
+            signature.typeParameters = parseTypeParameters();
+            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
+            if (returnTokenRequired) {
+                parseExpected(returnToken);
+                signature.type = parseTypeOrTypePredicate();
+            }
+            else if (parseOptional(returnToken)) {
+                signature.type = parseTypeOrTypePredicate();
+            }
+        }
+        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
+            if (parseExpected(17)) {
+                var savedYieldContext = inYieldContext();
+                var savedAwaitContext = inAwaitContext();
+                setYieldContext(yieldContext);
+                setAwaitContext(awaitContext);
+                var result = parseDelimitedList(16, parseParameter);
+                setYieldContext(savedYieldContext);
+                setAwaitContext(savedAwaitContext);
+                if (!parseExpected(18) && requireCompleteParameterList) {
+                    return undefined;
+                }
+                return result;
+            }
+            return requireCompleteParameterList ? undefined : createMissingList();
+        }
+        function parseTypeMemberSemicolon() {
+            if (parseOptional(24)) {
+                return;
+            }
+            parseSemicolon();
+        }
+        function parseSignatureMember(kind) {
+            var node = createNode(kind);
+            if (kind === 152) {
+                parseExpected(92);
+            }
+            fillSignature(54, false, false, false, node);
+            parseTypeMemberSemicolon();
+            return finishNode(node);
+        }
+        function isIndexSignature() {
+            if (token !== 19) {
+                return false;
+            }
+            return lookAhead(isUnambiguouslyIndexSignature);
+        }
+        function isUnambiguouslyIndexSignature() {
+            nextToken();
+            if (token === 22 || token === 20) {
+                return true;
+            }
+            if (ts.isModifierKind(token)) {
+                nextToken();
+                if (isIdentifier()) {
+                    return true;
+                }
+            }
+            else if (!isIdentifier()) {
+                return false;
+            }
+            else {
+                nextToken();
+            }
+            if (token === 54 || token === 24) {
+                return true;
+            }
+            if (token !== 53) {
+                return false;
+            }
+            nextToken();
+            return token === 54 || token === 24 || token === 20;
+        }
+        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(153, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.parameters = parseBracketedList(16, parseParameter, 19, 20);
+            node.type = parseTypeAnnotation();
+            parseTypeMemberSemicolon();
+            return finishNode(node);
+        }
+        function parsePropertyOrMethodSignature(fullStart, modifiers) {
+            var name = parsePropertyName();
+            var questionToken = parseOptionalToken(53);
+            if (token === 17 || token === 25) {
+                var method = createNode(146, fullStart);
+                setModifiers(method, modifiers);
+                method.name = name;
+                method.questionToken = questionToken;
+                fillSignature(54, false, false, false, method);
+                parseTypeMemberSemicolon();
+                return finishNode(method);
+            }
+            else {
+                var property = createNode(144, fullStart);
+                setModifiers(property, modifiers);
+                property.name = name;
+                property.questionToken = questionToken;
+                property.type = parseTypeAnnotation();
+                if (token === 56) {
+                    property.initializer = parseNonParameterInitializer();
+                }
+                parseTypeMemberSemicolon();
+                return finishNode(property);
+            }
+        }
+        function isTypeMemberStart() {
+            var idToken;
+            if (token === 17 || token === 25) {
+                return true;
+            }
+            while (ts.isModifierKind(token)) {
+                idToken = token;
+                nextToken();
+            }
+            if (token === 19) {
+                return true;
+            }
+            if (isLiteralPropertyName()) {
+                idToken = token;
+                nextToken();
+            }
+            if (idToken) {
+                return token === 17 ||
+                    token === 25 ||
+                    token === 53 ||
+                    token === 54 ||
+                    canParseSemicolon();
+            }
+            return false;
+        }
+        function parseTypeMember() {
+            if (token === 17 || token === 25) {
+                return parseSignatureMember(151);
+            }
+            if (token === 92 && lookAhead(isStartOfConstructSignature)) {
+                return parseSignatureMember(152);
+            }
+            var fullStart = getNodePos();
+            var modifiers = parseModifiers();
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, undefined, modifiers);
+            }
+            return parsePropertyOrMethodSignature(fullStart, modifiers);
+        }
+        function isStartOfConstructSignature() {
+            nextToken();
+            return token === 17 || token === 25;
+        }
+        function parseTypeLiteral() {
+            var node = createNode(159);
+            node.members = parseObjectTypeMembers();
+            return finishNode(node);
+        }
+        function parseObjectTypeMembers() {
+            var members;
+            if (parseExpected(15)) {
+                members = parseList(4, parseTypeMember);
+                parseExpected(16);
+            }
+            else {
+                members = createMissingList();
+            }
+            return members;
+        }
+        function parseTupleType() {
+            var node = createNode(161);
+            node.elementTypes = parseBracketedList(19, parseType, 19, 20);
+            return finishNode(node);
+        }
+        function parseParenthesizedType() {
+            var node = createNode(164);
+            parseExpected(17);
+            node.type = parseType();
+            parseExpected(18);
+            return finishNode(node);
+        }
+        function parseFunctionOrConstructorType(kind) {
+            var node = createNode(kind);
+            if (kind === 157) {
+                parseExpected(92);
+            }
+            fillSignature(34, false, false, false, node);
+            return finishNode(node);
+        }
+        function parseKeywordAndNoDot() {
+            var node = parseTokenNode();
+            return token === 21 ? undefined : node;
+        }
+        function parseNonArrayType() {
+            switch (token) {
+                case 117:
+                case 132:
+                case 130:
+                case 120:
+                case 133:
+                case 135:
+                case 127:
+                    var node = tryParse(parseKeywordAndNoDot);
+                    return node || parseTypeReference();
+                case 9:
+                    return parseStringLiteralTypeNode();
+                case 103:
+                case 93:
+                    return parseTokenNode();
+                case 97: {
+                    var thisKeyword = parseThisTypeNode();
+                    if (token === 124 && !scanner.hasPrecedingLineBreak()) {
+                        return parseThisTypePredicate(thisKeyword);
+                    }
+                    else {
+                        return thisKeyword;
+                    }
+                }
+                case 101:
+                    return parseTypeQuery();
+                case 15:
+                    return parseTypeLiteral();
+                case 19:
+                    return parseTupleType();
+                case 17:
+                    return parseParenthesizedType();
+                default:
+                    return parseTypeReference();
+            }
+        }
+        function isStartOfType() {
+            switch (token) {
+                case 117:
+                case 132:
+                case 130:
+                case 120:
+                case 133:
+                case 103:
+                case 135:
+                case 93:
+                case 97:
+                case 101:
+                case 127:
+                case 15:
+                case 19:
+                case 25:
+                case 92:
+                case 9:
+                    return true;
+                case 17:
+                    return lookAhead(isStartOfParenthesizedOrFunctionType);
+                default:
+                    return isIdentifier();
+            }
+        }
+        function isStartOfParenthesizedOrFunctionType() {
+            nextToken();
+            return token === 18 || isStartOfParameter() || isStartOfType();
+        }
+        function parseArrayTypeOrHigher() {
+            var type = parseNonArrayType();
+            while (!scanner.hasPrecedingLineBreak() && parseOptional(19)) {
+                parseExpected(20);
+                var node = createNode(160, type.pos);
+                node.elementType = type;
+                type = finishNode(node);
+            }
+            return type;
+        }
+        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
+            var type = parseConstituentType();
+            if (token === operator) {
+                var types = [type];
+                types.pos = type.pos;
+                while (parseOptional(operator)) {
+                    types.push(parseConstituentType());
+                }
+                types.end = getNodeEnd();
+                var node = createNode(kind, type.pos);
+                node.types = types;
+                type = finishNode(node);
+            }
+            return type;
+        }
+        function parseIntersectionTypeOrHigher() {
+            return parseUnionOrIntersectionType(163, parseArrayTypeOrHigher, 46);
+        }
+        function parseUnionTypeOrHigher() {
+            return parseUnionOrIntersectionType(162, parseIntersectionTypeOrHigher, 47);
+        }
+        function isStartOfFunctionType() {
+            if (token === 25) {
+                return true;
+            }
+            return token === 17 && lookAhead(isUnambiguouslyStartOfFunctionType);
+        }
+        function skipParameterStart() {
+            if (ts.isModifierKind(token)) {
+                parseModifiers();
+            }
+            if (isIdentifier() || token === 97) {
+                nextToken();
+                return true;
+            }
+            if (token === 19 || token === 15) {
+                var previousErrorCount = parseDiagnostics.length;
+                parseIdentifierOrPattern();
+                return previousErrorCount === parseDiagnostics.length;
+            }
+            return false;
+        }
+        function isUnambiguouslyStartOfFunctionType() {
+            nextToken();
+            if (token === 18 || token === 22) {
+                return true;
+            }
+            if (skipParameterStart()) {
+                if (token === 54 || token === 24 ||
+                    token === 53 || token === 56) {
+                    return true;
+                }
+                if (token === 18) {
+                    nextToken();
+                    if (token === 34) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function parseTypeOrTypePredicate() {
+            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
+            var type = parseType();
+            if (typePredicateVariable) {
+                var node = createNode(154, typePredicateVariable.pos);
+                node.parameterName = typePredicateVariable;
+                node.type = type;
+                return finishNode(node);
+            }
+            else {
+                return type;
+            }
+        }
+        function parseTypePredicatePrefix() {
+            var id = parseIdentifier();
+            if (token === 124 && !scanner.hasPrecedingLineBreak()) {
+                nextToken();
+                return id;
+            }
+        }
+        function parseType() {
+            return doOutsideOfContext(41943040, parseTypeWorker);
+        }
+        function parseTypeWorker() {
+            if (isStartOfFunctionType()) {
+                return parseFunctionOrConstructorType(156);
+            }
+            if (token === 92) {
+                return parseFunctionOrConstructorType(157);
+            }
+            return parseUnionTypeOrHigher();
+        }
+        function parseTypeAnnotation() {
+            return parseOptional(54) ? parseType() : undefined;
+        }
+        function isStartOfLeftHandSideExpression() {
+            switch (token) {
+                case 97:
+                case 95:
+                case 93:
+                case 99:
+                case 84:
+                case 8:
+                case 9:
+                case 11:
+                case 12:
+                case 17:
+                case 19:
+                case 15:
+                case 87:
+                case 73:
+                case 92:
+                case 39:
+                case 61:
+                case 69:
+                    return true;
+                default:
+                    return isIdentifier();
+            }
+        }
+        function isStartOfExpression() {
+            if (isStartOfLeftHandSideExpression()) {
+                return true;
+            }
+            switch (token) {
+                case 35:
+                case 36:
+                case 50:
+                case 49:
+                case 78:
+                case 101:
+                case 103:
+                case 41:
+                case 42:
+                case 25:
+                case 119:
+                case 114:
+                    return true;
+                default:
+                    if (isBinaryOperator()) {
+                        return true;
+                    }
+                    return isIdentifier();
+            }
+        }
+        function isStartOfExpressionStatement() {
+            return token !== 15 &&
+                token !== 87 &&
+                token !== 73 &&
+                token !== 55 &&
+                isStartOfExpression();
+        }
+        function parseExpression() {
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(false);
+            }
+            var expr = parseAssignmentExpressionOrHigher();
+            var operatorToken;
+            while ((operatorToken = parseOptionalToken(24))) {
+                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
+            }
+            if (saveDecoratorContext) {
+                setDecoratorContext(true);
+            }
+            return expr;
+        }
+        function parseInitializer(inParameter) {
+            if (token !== 56) {
+                if (scanner.hasPrecedingLineBreak() || (inParameter && token === 15) || !isStartOfExpression()) {
+                    return undefined;
+                }
+            }
+            parseExpected(56);
+            return parseAssignmentExpressionOrHigher();
+        }
+        function parseAssignmentExpressionOrHigher() {
+            if (isYieldExpression()) {
+                return parseYieldExpression();
+            }
+            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
+            if (arrowExpression) {
+                return arrowExpression;
+            }
+            var expr = parseBinaryExpressionOrHigher(0);
+            if (expr.kind === 69 && token === 34) {
+                return parseSimpleArrowFunctionExpression(expr);
+            }
+            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
+                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
+            }
+            return parseConditionalExpressionRest(expr);
+        }
+        function isYieldExpression() {
+            if (token === 114) {
+                if (inYieldContext()) {
+                    return true;
+                }
+                return lookAhead(nextTokenIsIdentifierOrKeywordOrNumberOnSameLine);
+            }
+            return false;
+        }
+        function nextTokenIsIdentifierOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && isIdentifier();
+        }
+        function parseYieldExpression() {
+            var node = createNode(190);
+            nextToken();
+            if (!scanner.hasPrecedingLineBreak() &&
+                (token === 37 || isStartOfExpression())) {
+                node.asteriskToken = parseOptionalToken(37);
+                node.expression = parseAssignmentExpressionOrHigher();
+                return finishNode(node);
+            }
+            else {
+                return finishNode(node);
+            }
+        }
+        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
+            ts.Debug.assert(token === 34, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
+            var node;
+            if (asyncModifier) {
+                node = createNode(180, asyncModifier.pos);
+                setModifiers(node, asyncModifier);
+            }
+            else {
+                node = createNode(180, identifier.pos);
+            }
+            var parameter = createNode(142, identifier.pos);
+            parameter.name = identifier;
+            finishNode(parameter);
+            node.parameters = [parameter];
+            node.parameters.pos = parameter.pos;
+            node.parameters.end = parameter.end;
+            node.equalsGreaterThanToken = parseExpectedToken(34, false, ts.Diagnostics._0_expected, "=>");
+            node.body = parseArrowFunctionExpressionBody(!!asyncModifier);
+            return finishNode(node);
+        }
+        function tryParseParenthesizedArrowFunctionExpression() {
+            var triState = isParenthesizedArrowFunctionExpression();
+            if (triState === 0) {
+                return undefined;
+            }
+            var arrowFunction = triState === 1
+                ? parseParenthesizedArrowFunctionExpressionHead(true)
+                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
+            if (!arrowFunction) {
+                return undefined;
+            }
+            var isAsync = !!(arrowFunction.flags & 256);
+            var lastToken = token;
+            arrowFunction.equalsGreaterThanToken = parseExpectedToken(34, false, ts.Diagnostics._0_expected, "=>");
+            arrowFunction.body = (lastToken === 34 || lastToken === 15)
+                ? parseArrowFunctionExpressionBody(isAsync)
+                : parseIdentifier();
+            return finishNode(arrowFunction);
+        }
+        function isParenthesizedArrowFunctionExpression() {
+            if (token === 17 || token === 25 || token === 118) {
+                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
+            }
+            if (token === 34) {
+                return 1;
+            }
+            return 0;
+        }
+        function isParenthesizedArrowFunctionExpressionWorker() {
+            if (token === 118) {
+                nextToken();
+                if (scanner.hasPrecedingLineBreak()) {
+                    return 0;
+                }
+                if (token !== 17 && token !== 25) {
+                    return 0;
+                }
+            }
+            var first = token;
+            var second = nextToken();
+            if (first === 17) {
+                if (second === 18) {
+                    var third = nextToken();
+                    switch (third) {
+                        case 34:
+                        case 54:
+                        case 15:
+                            return 1;
+                        default:
+                            return 0;
+                    }
+                }
+                if (second === 19 || second === 15) {
+                    return 2;
+                }
+                if (second === 22) {
+                    return 1;
+                }
+                if (!isIdentifier()) {
+                    return 0;
+                }
+                if (nextToken() === 54) {
+                    return 1;
+                }
+                return 2;
+            }
+            else {
+                ts.Debug.assert(first === 25);
+                if (!isIdentifier()) {
+                    return 0;
+                }
+                if (sourceFile.languageVariant === 1) {
+                    var isArrowFunctionInJsx = lookAhead(function () {
+                        var third = nextToken();
+                        if (third === 83) {
+                            var fourth = nextToken();
+                            switch (fourth) {
+                                case 56:
+                                case 27:
+                                    return false;
+                                default:
+                                    return true;
+                            }
+                        }
+                        else if (third === 24) {
+                            return true;
+                        }
+                        return false;
+                    });
+                    if (isArrowFunctionInJsx) {
+                        return 1;
+                    }
+                    return 0;
+                }
+                return 2;
+            }
+        }
+        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
+            return parseParenthesizedArrowFunctionExpressionHead(false);
+        }
+        function tryParseAsyncSimpleArrowFunctionExpression() {
+            if (token === 118) {
+                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
+                if (isUnParenthesizedAsyncArrowFunction === 1) {
+                    var asyncModifier = parseModifiersForArrowFunction();
+                    var expr = parseBinaryExpressionOrHigher(0);
+                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
+                }
+            }
+            return undefined;
+        }
+        function isUnParenthesizedAsyncArrowFunctionWorker() {
+            if (token === 118) {
+                nextToken();
+                if (scanner.hasPrecedingLineBreak() || token === 34) {
+                    return 0;
+                }
+                var expr = parseBinaryExpressionOrHigher(0);
+                if (!scanner.hasPrecedingLineBreak() && expr.kind === 69 && token === 34) {
+                    return 1;
+                }
+            }
+            return 0;
+        }
+        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
+            var node = createNode(180);
+            setModifiers(node, parseModifiersForArrowFunction());
+            var isAsync = !!(node.flags & 256);
+            fillSignature(54, false, isAsync, !allowAmbiguity, node);
+            if (!node.parameters) {
+                return undefined;
+            }
+            if (!allowAmbiguity && token !== 34 && token !== 15) {
+                return undefined;
+            }
+            return node;
+        }
+        function parseArrowFunctionExpressionBody(isAsync) {
+            if (token === 15) {
+                return parseFunctionBlock(false, isAsync, false);
+            }
+            if (token !== 23 &&
+                token !== 87 &&
+                token !== 73 &&
+                isStartOfStatement() &&
+                !isStartOfExpressionStatement()) {
+                return parseFunctionBlock(false, isAsync, true);
+            }
+            return isAsync
+                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
+                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
+        }
+        function parseConditionalExpressionRest(leftOperand) {
+            var questionToken = parseOptionalToken(53);
+            if (!questionToken) {
+                return leftOperand;
+            }
+            var node = createNode(188, leftOperand.pos);
+            node.condition = leftOperand;
+            node.questionToken = questionToken;
+            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
+            node.colonToken = parseExpectedToken(54, false, ts.Diagnostics._0_expected, ts.tokenToString(54));
+            node.whenFalse = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
+        }
+        function parseBinaryExpressionOrHigher(precedence) {
+            var leftOperand = parseUnaryExpressionOrHigher();
+            return parseBinaryExpressionRest(precedence, leftOperand);
+        }
+        function isInOrOfKeyword(t) {
+            return t === 90 || t === 138;
+        }
+        function parseBinaryExpressionRest(precedence, leftOperand) {
+            while (true) {
+                reScanGreaterToken();
+                var newPrecedence = getBinaryOperatorPrecedence();
+                var consumeCurrentOperator = token === 38 ?
+                    newPrecedence >= precedence :
+                    newPrecedence > precedence;
+                if (!consumeCurrentOperator) {
+                    break;
+                }
+                if (token === 90 && inDisallowInContext()) {
+                    break;
+                }
+                if (token === 116) {
+                    if (scanner.hasPrecedingLineBreak()) {
+                        break;
+                    }
+                    else {
+                        nextToken();
+                        leftOperand = makeAsExpression(leftOperand, parseType());
+                    }
+                }
+                else {
+                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
+                }
+            }
+            return leftOperand;
+        }
+        function isBinaryOperator() {
+            if (inDisallowInContext() && token === 90) {
+                return false;
+            }
+            return getBinaryOperatorPrecedence() > 0;
+        }
+        function getBinaryOperatorPrecedence() {
+            switch (token) {
+                case 52:
+                    return 1;
+                case 51:
+                    return 2;
+                case 47:
+                    return 3;
+                case 48:
+                    return 4;
+                case 46:
+                    return 5;
+                case 30:
+                case 31:
+                case 32:
+                case 33:
+                    return 6;
+                case 25:
+                case 27:
+                case 28:
+                case 29:
+                case 91:
+                case 90:
+                case 116:
+                    return 7;
+                case 43:
+                case 44:
+                case 45:
+                    return 8;
+                case 35:
+                case 36:
+                    return 9;
+                case 37:
+                case 39:
+                case 40:
+                    return 10;
+                case 38:
+                    return 11;
+            }
+            return -1;
+        }
+        function makeBinaryExpression(left, operatorToken, right) {
+            var node = createNode(187, left.pos);
+            node.left = left;
+            node.operatorToken = operatorToken;
+            node.right = right;
+            return finishNode(node);
+        }
+        function makeAsExpression(left, right) {
+            var node = createNode(195, left.pos);
+            node.expression = left;
+            node.type = right;
+            return finishNode(node);
+        }
+        function parsePrefixUnaryExpression() {
+            var node = createNode(185);
+            node.operator = token;
+            nextToken();
+            node.operand = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseDeleteExpression() {
+            var node = createNode(181);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseTypeOfExpression() {
+            var node = createNode(182);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseVoidExpression() {
+            var node = createNode(183);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function isAwaitExpression() {
+            if (token === 119) {
+                if (inAwaitContext()) {
+                    return true;
+                }
+                return lookAhead(nextTokenIsIdentifierOnSameLine);
+            }
+            return false;
+        }
+        function parseAwaitExpression() {
+            var node = createNode(184);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseUnaryExpressionOrHigher() {
+            if (isAwaitExpression()) {
+                return parseAwaitExpression();
+            }
+            if (isIncrementExpression()) {
+                var incrementExpression = parseIncrementExpression();
+                return token === 38 ?
+                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), incrementExpression) :
+                    incrementExpression;
+            }
+            var unaryOperator = token;
+            var simpleUnaryExpression = parseSimpleUnaryExpression();
+            if (token === 38) {
+                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
+                if (simpleUnaryExpression.kind === 177) {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
+                }
+                else {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
+                }
+            }
+            return simpleUnaryExpression;
+        }
+        function parseSimpleUnaryExpression() {
+            switch (token) {
+                case 35:
+                case 36:
+                case 50:
+                case 49:
+                    return parsePrefixUnaryExpression();
+                case 78:
+                    return parseDeleteExpression();
+                case 101:
+                    return parseTypeOfExpression();
+                case 103:
+                    return parseVoidExpression();
+                case 25:
+                    return parseTypeAssertion();
+                default:
+                    return parseIncrementExpression();
+            }
+        }
+        function isIncrementExpression() {
+            switch (token) {
+                case 35:
+                case 36:
+                case 50:
+                case 49:
+                case 78:
+                case 101:
+                case 103:
+                    return false;
+                case 25:
+                    if (sourceFile.languageVariant !== 1) {
+                        return false;
+                    }
+                default:
+                    return true;
+            }
+        }
+        function parseIncrementExpression() {
+            if (token === 41 || token === 42) {
+                var node = createNode(185);
+                node.operator = token;
+                nextToken();
+                node.operand = parseLeftHandSideExpressionOrHigher();
+                return finishNode(node);
+            }
+            else if (sourceFile.languageVariant === 1 && token === 25 && lookAhead(nextTokenIsIdentifierOrKeyword)) {
+                return parseJsxElementOrSelfClosingElement(true);
+            }
+            var expression = parseLeftHandSideExpressionOrHigher();
+            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
+            if ((token === 41 || token === 42) && !scanner.hasPrecedingLineBreak()) {
+                var node = createNode(186, expression.pos);
+                node.operand = expression;
+                node.operator = token;
+                nextToken();
+                return finishNode(node);
+            }
+            return expression;
+        }
+        function parseLeftHandSideExpressionOrHigher() {
+            var expression = token === 95
+                ? parseSuperExpression()
+                : parseMemberExpressionOrHigher();
+            return parseCallExpressionRest(expression);
+        }
+        function parseMemberExpressionOrHigher() {
+            var expression = parsePrimaryExpression();
+            return parseMemberExpressionRest(expression);
+        }
+        function parseSuperExpression() {
+            var expression = parseTokenNode();
+            if (token === 17 || token === 21 || token === 19) {
+                return expression;
+            }
+            var node = createNode(172, expression.pos);
+            node.expression = expression;
+            node.dotToken = parseExpectedToken(21, false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
+            node.name = parseRightSideOfDot(true);
+            return finishNode(node);
+        }
+        function tagNamesAreEquivalent(lhs, rhs) {
+            if (lhs.kind !== rhs.kind) {
+                return false;
+            }
+            if (lhs.kind === 69) {
+                return lhs.text === rhs.text;
+            }
+            return lhs.right.text === rhs.right.text &&
+                tagNamesAreEquivalent(lhs.left, rhs.left);
+        }
+        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
+            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
+            var result;
+            if (opening.kind === 243) {
+                var node = createNode(241, opening.pos);
+                node.openingElement = opening;
+                node.children = parseJsxChildren(node.openingElement.tagName);
+                node.closingElement = parseJsxClosingElement(inExpressionContext);
+                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
+                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
+                }
+                result = finishNode(node);
+            }
+            else {
+                ts.Debug.assert(opening.kind === 242);
+                result = opening;
+            }
+            if (inExpressionContext && token === 25) {
+                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(true); });
+                if (invalidElement) {
+                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
+                    var badNode = createNode(187, result.pos);
+                    badNode.end = invalidElement.end;
+                    badNode.left = result;
+                    badNode.right = invalidElement;
+                    badNode.operatorToken = createMissingNode(24, false, undefined);
+                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
+                    return badNode;
+                }
+            }
+            return result;
+        }
+        function parseJsxText() {
+            var node = createNode(244, scanner.getStartPos());
+            token = scanner.scanJsxToken();
+            return finishNode(node);
+        }
+        function parseJsxChild() {
+            switch (token) {
+                case 244:
+                    return parseJsxText();
+                case 15:
+                    return parseJsxExpression(false);
+                case 25:
+                    return parseJsxElementOrSelfClosingElement(false);
+            }
+            ts.Debug.fail("Unknown JSX child kind " + token);
+        }
+        function parseJsxChildren(openingTagName) {
+            var result = [];
+            result.pos = scanner.getStartPos();
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << 14;
+            while (true) {
+                token = scanner.reScanJsxToken();
+                if (token === 26) {
+                    break;
+                }
+                else if (token === 1) {
+                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
+                    break;
+                }
+                result.push(parseJsxChild());
+            }
+            result.end = scanner.getTokenPos();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
+            var fullStart = scanner.getStartPos();
+            parseExpected(25);
+            var tagName = parseJsxElementName();
+            var attributes = parseList(13, parseJsxAttribute);
+            var node;
+            if (token === 27) {
+                node = createNode(243, fullStart);
+                scanJsxText();
+            }
+            else {
+                parseExpected(39);
+                if (inExpressionContext) {
+                    parseExpected(27);
+                }
+                else {
+                    parseExpected(27, undefined, false);
+                    scanJsxText();
+                }
+                node = createNode(242, fullStart);
+            }
+            node.tagName = tagName;
+            node.attributes = attributes;
+            return finishNode(node);
+        }
+        function parseJsxElementName() {
+            scanJsxIdentifier();
+            var elementName = parseIdentifierName();
+            while (parseOptional(21)) {
+                scanJsxIdentifier();
+                var node = createNode(139, elementName.pos);
+                node.left = elementName;
+                node.right = parseIdentifierName();
+                elementName = finishNode(node);
+            }
+            return elementName;
+        }
+        function parseJsxExpression(inExpressionContext) {
+            var node = createNode(248);
+            parseExpected(15);
+            if (token !== 16) {
+                node.expression = parseAssignmentExpressionOrHigher();
+            }
+            if (inExpressionContext) {
+                parseExpected(16);
+            }
+            else {
+                parseExpected(16, undefined, false);
+                scanJsxText();
+            }
+            return finishNode(node);
+        }
+        function parseJsxAttribute() {
+            if (token === 15) {
+                return parseJsxSpreadAttribute();
+            }
+            scanJsxIdentifier();
+            var node = createNode(246);
+            node.name = parseIdentifierName();
+            if (parseOptional(56)) {
+                switch (token) {
+                    case 9:
+                        node.initializer = parseLiteralNode();
+                        break;
+                    default:
+                        node.initializer = parseJsxExpression(true);
+                        break;
+                }
+            }
+            return finishNode(node);
+        }
+        function parseJsxSpreadAttribute() {
+            var node = createNode(247);
+            parseExpected(15);
+            parseExpected(22);
+            node.expression = parseExpression();
+            parseExpected(16);
+            return finishNode(node);
+        }
+        function parseJsxClosingElement(inExpressionContext) {
+            var node = createNode(245);
+            parseExpected(26);
+            node.tagName = parseJsxElementName();
+            if (inExpressionContext) {
+                parseExpected(27);
+            }
+            else {
+                parseExpected(27, undefined, false);
+                scanJsxText();
+            }
+            return finishNode(node);
+        }
+        function parseTypeAssertion() {
+            var node = createNode(177);
+            parseExpected(25);
+            node.type = parseType();
+            parseExpected(27);
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseMemberExpressionRest(expression) {
+            while (true) {
+                var dotToken = parseOptionalToken(21);
+                if (dotToken) {
+                    var propertyAccess = createNode(172, expression.pos);
+                    propertyAccess.expression = expression;
+                    propertyAccess.dotToken = dotToken;
+                    propertyAccess.name = parseRightSideOfDot(true);
+                    expression = finishNode(propertyAccess);
+                    continue;
+                }
+                if (token === 49 && !scanner.hasPrecedingLineBreak()) {
+                    nextToken();
+                    var nonNullExpression = createNode(196, expression.pos);
+                    nonNullExpression.expression = expression;
+                    expression = finishNode(nonNullExpression);
+                    continue;
+                }
+                if (!inDecoratorContext() && parseOptional(19)) {
+                    var indexedAccess = createNode(173, expression.pos);
+                    indexedAccess.expression = expression;
+                    if (token !== 20) {
+                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
+                        if (indexedAccess.argumentExpression.kind === 9 || indexedAccess.argumentExpression.kind === 8) {
+                            var literal = indexedAccess.argumentExpression;
+                            literal.text = internIdentifier(literal.text);
+                        }
+                    }
+                    parseExpected(20);
+                    expression = finishNode(indexedAccess);
+                    continue;
+                }
+                if (token === 11 || token === 12) {
+                    var tagExpression = createNode(176, expression.pos);
+                    tagExpression.tag = expression;
+                    tagExpression.template = token === 11
+                        ? parseLiteralNode()
+                        : parseTemplateExpression();
+                    expression = finishNode(tagExpression);
+                    continue;
+                }
+                return expression;
+            }
+        }
+        function parseCallExpressionRest(expression) {
+            while (true) {
+                expression = parseMemberExpressionRest(expression);
+                if (token === 25) {
+                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
+                    if (!typeArguments) {
+                        return expression;
+                    }
+                    var callExpr = createNode(174, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.typeArguments = typeArguments;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                else if (token === 17) {
+                    var callExpr = createNode(174, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                return expression;
+            }
+        }
+        function parseArgumentList() {
+            parseExpected(17);
+            var result = parseDelimitedList(11, parseArgumentExpression);
+            parseExpected(18);
+            return result;
+        }
+        function parseTypeArgumentsInExpression() {
+            if (!parseOptional(25)) {
+                return undefined;
+            }
+            var typeArguments = parseDelimitedList(18, parseType);
+            if (!parseExpected(27)) {
+                return undefined;
+            }
+            return typeArguments && canFollowTypeArgumentsInExpression()
+                ? typeArguments
+                : undefined;
+        }
+        function canFollowTypeArgumentsInExpression() {
+            switch (token) {
+                case 17:
+                case 21:
+                case 18:
+                case 20:
+                case 54:
+                case 23:
+                case 53:
+                case 30:
+                case 32:
+                case 31:
+                case 33:
+                case 51:
+                case 52:
+                case 48:
+                case 46:
+                case 47:
+                case 16:
+                case 1:
+                    return true;
+                case 24:
+                case 15:
+                default:
+                    return false;
+            }
+        }
+        function parsePrimaryExpression() {
+            switch (token) {
+                case 8:
+                case 9:
+                case 11:
+                    return parseLiteralNode();
+                case 97:
+                case 95:
+                case 93:
+                case 99:
+                case 84:
+                    return parseTokenNode();
+                case 17:
+                    return parseParenthesizedExpression();
+                case 19:
+                    return parseArrayLiteralExpression();
+                case 15:
+                    return parseObjectLiteralExpression();
+                case 118:
+                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
+                        break;
+                    }
+                    return parseFunctionExpression();
+                case 73:
+                    return parseClassExpression();
+                case 87:
+                    return parseFunctionExpression();
+                case 92:
+                    return parseNewExpression();
+                case 39:
+                case 61:
+                    if (reScanSlashToken() === 10) {
+                        return parseLiteralNode();
+                    }
+                    break;
+                case 12:
+                    return parseTemplateExpression();
+            }
+            return parseIdentifier(ts.Diagnostics.Expression_expected);
+        }
+        function parseParenthesizedExpression() {
+            var node = createNode(178);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            return finishNode(node);
+        }
+        function parseSpreadElement() {
+            var node = createNode(191);
+            parseExpected(22);
+            node.expression = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
+        }
+        function parseArgumentOrArrayLiteralElement() {
+            return token === 22 ? parseSpreadElement() :
+                token === 24 ? createNode(193) :
+                    parseAssignmentExpressionOrHigher();
+        }
+        function parseArgumentExpression() {
+            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
+        }
+        function parseArrayLiteralExpression() {
+            var node = createNode(170);
+            parseExpected(19);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.elements = parseDelimitedList(15, parseArgumentOrArrayLiteralElement);
+            parseExpected(20);
+            return finishNode(node);
+        }
+        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
+            if (parseContextualModifier(123)) {
+                return addJSDocComment(parseAccessorDeclaration(149, fullStart, decorators, modifiers));
+            }
+            else if (parseContextualModifier(131)) {
+                return parseAccessorDeclaration(150, fullStart, decorators, modifiers);
+            }
+            return undefined;
+        }
+        function parseObjectLiteralElement() {
+            var fullStart = scanner.getStartPos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
+            }
+            var asteriskToken = parseOptionalToken(37);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            var questionToken = parseOptionalToken(53);
+            if (asteriskToken || token === 17 || token === 25) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
+            }
+            var isShorthandPropertyAssignment = tokenIsIdentifier && (token === 24 || token === 16 || token === 56);
+            if (isShorthandPropertyAssignment) {
+                var shorthandDeclaration = createNode(254, fullStart);
+                shorthandDeclaration.name = propertyName;
+                shorthandDeclaration.questionToken = questionToken;
+                var equalsToken = parseOptionalToken(56);
+                if (equalsToken) {
+                    shorthandDeclaration.equalsToken = equalsToken;
+                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                }
+                return addJSDocComment(finishNode(shorthandDeclaration));
+            }
+            else {
+                var propertyAssignment = createNode(253, fullStart);
+                propertyAssignment.modifiers = modifiers;
+                propertyAssignment.name = propertyName;
+                propertyAssignment.questionToken = questionToken;
+                parseExpected(54);
+                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                return addJSDocComment(finishNode(propertyAssignment));
+            }
+        }
+        function parseObjectLiteralExpression() {
+            var node = createNode(171);
+            parseExpected(15);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.properties = parseDelimitedList(12, parseObjectLiteralElement, true);
+            parseExpected(16);
+            return finishNode(node);
+        }
+        function parseFunctionExpression() {
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(false);
+            }
+            var node = createNode(179);
+            setModifiers(node, parseModifiers());
+            parseExpected(87);
+            node.asteriskToken = parseOptionalToken(37);
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = !!(node.flags & 256);
+            node.name =
+                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
+                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
+                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
+                            parseOptionalIdentifier();
+            fillSignature(54, isGenerator, isAsync, false, node);
+            node.body = parseFunctionBlock(isGenerator, isAsync, false);
+            if (saveDecoratorContext) {
+                setDecoratorContext(true);
+            }
+            return addJSDocComment(finishNode(node));
+        }
+        function parseOptionalIdentifier() {
+            return isIdentifier() ? parseIdentifier() : undefined;
+        }
+        function parseNewExpression() {
+            var node = createNode(175);
+            parseExpected(92);
+            node.expression = parseMemberExpressionOrHigher();
+            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
+            if (node.typeArguments || token === 17) {
+                node.arguments = parseArgumentList();
+            }
+            return finishNode(node);
+        }
+        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
+            var node = createNode(199);
+            if (parseExpected(15, diagnosticMessage) || ignoreMissingOpenBrace) {
+                node.statements = parseList(1, parseStatement);
+                parseExpected(16);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
+            var savedYieldContext = inYieldContext();
+            setYieldContext(allowYield);
+            var savedAwaitContext = inAwaitContext();
+            setAwaitContext(allowAwait);
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(false);
+            }
+            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
+            if (saveDecoratorContext) {
+                setDecoratorContext(true);
+            }
+            setYieldContext(savedYieldContext);
+            setAwaitContext(savedAwaitContext);
+            return block;
+        }
+        function parseEmptyStatement() {
+            var node = createNode(201);
+            parseExpected(23);
+            return finishNode(node);
+        }
+        function parseIfStatement() {
+            var node = createNode(203);
+            parseExpected(88);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            node.thenStatement = parseStatement();
+            node.elseStatement = parseOptional(80) ? parseStatement() : undefined;
+            return finishNode(node);
+        }
+        function parseDoStatement() {
+            var node = createNode(204);
+            parseExpected(79);
+            node.statement = parseStatement();
+            parseExpected(104);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            parseOptional(23);
+            return finishNode(node);
+        }
+        function parseWhileStatement() {
+            var node = createNode(205);
+            parseExpected(104);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            node.statement = parseStatement();
+            return finishNode(node);
+        }
+        function parseForOrForInOrForOfStatement() {
+            var pos = getNodePos();
+            parseExpected(86);
+            parseExpected(17);
+            var initializer = undefined;
+            if (token !== 23) {
+                if (token === 102 || token === 108 || token === 74) {
+                    initializer = parseVariableDeclarationList(true);
+                }
+                else {
+                    initializer = disallowInAnd(parseExpression);
+                }
+            }
+            var forOrForInOrForOfStatement;
+            if (parseOptional(90)) {
+                var forInStatement = createNode(207, pos);
+                forInStatement.initializer = initializer;
+                forInStatement.expression = allowInAnd(parseExpression);
+                parseExpected(18);
+                forOrForInOrForOfStatement = forInStatement;
+            }
+            else if (parseOptional(138)) {
+                var forOfStatement = createNode(208, pos);
+                forOfStatement.initializer = initializer;
+                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
+                parseExpected(18);
+                forOrForInOrForOfStatement = forOfStatement;
+            }
+            else {
+                var forStatement = createNode(206, pos);
+                forStatement.initializer = initializer;
+                parseExpected(23);
+                if (token !== 23 && token !== 18) {
+                    forStatement.condition = allowInAnd(parseExpression);
+                }
+                parseExpected(23);
+                if (token !== 18) {
+                    forStatement.incrementor = allowInAnd(parseExpression);
+                }
+                parseExpected(18);
+                forOrForInOrForOfStatement = forStatement;
+            }
+            forOrForInOrForOfStatement.statement = parseStatement();
+            return finishNode(forOrForInOrForOfStatement);
+        }
+        function parseBreakOrContinueStatement(kind) {
+            var node = createNode(kind);
+            parseExpected(kind === 210 ? 70 : 75);
+            if (!canParseSemicolon()) {
+                node.label = parseIdentifier();
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseReturnStatement() {
+            var node = createNode(211);
+            parseExpected(94);
+            if (!canParseSemicolon()) {
+                node.expression = allowInAnd(parseExpression);
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseWithStatement() {
+            var node = createNode(212);
+            parseExpected(105);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            node.statement = parseStatement();
+            return finishNode(node);
+        }
+        function parseCaseClause() {
+            var node = createNode(249);
+            parseExpected(71);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(54);
+            node.statements = parseList(3, parseStatement);
+            return finishNode(node);
+        }
+        function parseDefaultClause() {
+            var node = createNode(250);
+            parseExpected(77);
+            parseExpected(54);
+            node.statements = parseList(3, parseStatement);
+            return finishNode(node);
+        }
+        function parseCaseOrDefaultClause() {
+            return token === 71 ? parseCaseClause() : parseDefaultClause();
+        }
+        function parseSwitchStatement() {
+            var node = createNode(213);
+            parseExpected(96);
+            parseExpected(17);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18);
+            var caseBlock = createNode(227, scanner.getStartPos());
+            parseExpected(15);
+            caseBlock.clauses = parseList(2, parseCaseOrDefaultClause);
+            parseExpected(16);
+            node.caseBlock = finishNode(caseBlock);
+            return finishNode(node);
+        }
+        function parseThrowStatement() {
+            var node = createNode(215);
+            parseExpected(98);
+            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseTryStatement() {
+            var node = createNode(216);
+            parseExpected(100);
+            node.tryBlock = parseBlock(false);
+            node.catchClause = token === 72 ? parseCatchClause() : undefined;
+            if (!node.catchClause || token === 85) {
+                parseExpected(85);
+                node.finallyBlock = parseBlock(false);
+            }
+            return finishNode(node);
+        }
+        function parseCatchClause() {
+            var result = createNode(252);
+            parseExpected(72);
+            if (parseExpected(17)) {
+                result.variableDeclaration = parseVariableDeclaration();
+            }
+            parseExpected(18);
+            result.block = parseBlock(false);
+            return finishNode(result);
+        }
+        function parseDebuggerStatement() {
+            var node = createNode(217);
+            parseExpected(76);
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseExpressionOrLabeledStatement() {
+            var fullStart = scanner.getStartPos();
+            var expression = allowInAnd(parseExpression);
+            if (expression.kind === 69 && parseOptional(54)) {
+                var labeledStatement = createNode(214, fullStart);
+                labeledStatement.label = expression;
+                labeledStatement.statement = parseStatement();
+                return addJSDocComment(finishNode(labeledStatement));
+            }
+            else {
+                var expressionStatement = createNode(202, fullStart);
+                expressionStatement.expression = expression;
+                parseSemicolon();
+                return addJSDocComment(finishNode(expressionStatement));
+            }
+        }
+        function nextTokenIsIdentifierOrKeywordOnSameLine() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token) && !scanner.hasPrecedingLineBreak();
+        }
+        function nextTokenIsFunctionKeywordOnSameLine() {
+            nextToken();
+            return token === 87 && !scanner.hasPrecedingLineBreak();
+        }
+        function nextTokenIsIdentifierOrKeywordOrNumberOnSameLine() {
+            nextToken();
+            return (ts.tokenIsIdentifierOrKeyword(token) || token === 8) && !scanner.hasPrecedingLineBreak();
+        }
+        function isDeclaration() {
+            while (true) {
+                switch (token) {
+                    case 102:
+                    case 108:
+                    case 74:
+                    case 87:
+                    case 73:
+                    case 81:
+                        return true;
+                    case 107:
+                    case 134:
+                        return nextTokenIsIdentifierOnSameLine();
+                    case 125:
+                    case 126:
+                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
+                    case 115:
+                    case 118:
+                    case 122:
+                    case 110:
+                    case 111:
+                    case 112:
+                    case 128:
+                        nextToken();
+                        if (scanner.hasPrecedingLineBreak()) {
+                            return false;
+                        }
+                        continue;
+                    case 137:
+                        nextToken();
+                        return token === 15 || token === 69 || token === 82;
+                    case 89:
+                        nextToken();
+                        return token === 9 || token === 37 ||
+                            token === 15 || ts.tokenIsIdentifierOrKeyword(token);
+                    case 82:
+                        nextToken();
+                        if (token === 56 || token === 37 ||
+                            token === 15 || token === 77 ||
+                            token === 116) {
+                            return true;
+                        }
+                        continue;
+                    case 113:
+                        nextToken();
+                        continue;
+                    default:
+                        return false;
+                }
+            }
+        }
+        function isStartOfDeclaration() {
+            return lookAhead(isDeclaration);
+        }
+        function isStartOfStatement() {
+            switch (token) {
+                case 55:
+                case 23:
+                case 15:
+                case 102:
+                case 108:
+                case 87:
+                case 73:
+                case 81:
+                case 88:
+                case 79:
+                case 104:
+                case 86:
+                case 75:
+                case 70:
+                case 94:
+                case 105:
+                case 96:
+                case 98:
+                case 100:
+                case 76:
+                case 72:
+                case 85:
+                    return true;
+                case 74:
+                case 82:
+                case 89:
+                    return isStartOfDeclaration();
+                case 118:
+                case 122:
+                case 107:
+                case 125:
+                case 126:
+                case 134:
+                case 137:
+                    return true;
+                case 112:
+                case 110:
+                case 111:
+                case 113:
+                case 128:
+                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                default:
+                    return isStartOfExpression();
+            }
+        }
+        function nextTokenIsIdentifierOrStartOfDestructuring() {
+            nextToken();
+            return isIdentifier() || token === 15 || token === 19;
+        }
+        function isLetDeclaration() {
+            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
+        }
+        function parseStatement() {
+            switch (token) {
+                case 23:
+                    return parseEmptyStatement();
+                case 15:
+                    return parseBlock(false);
+                case 102:
+                    return parseVariableStatement(scanner.getStartPos(), undefined, undefined);
+                case 108:
+                    if (isLetDeclaration()) {
+                        return parseVariableStatement(scanner.getStartPos(), undefined, undefined);
+                    }
+                    break;
+                case 87:
+                    return parseFunctionDeclaration(scanner.getStartPos(), undefined, undefined);
+                case 73:
+                    return parseClassDeclaration(scanner.getStartPos(), undefined, undefined);
+                case 88:
+                    return parseIfStatement();
+                case 79:
+                    return parseDoStatement();
+                case 104:
+                    return parseWhileStatement();
+                case 86:
+                    return parseForOrForInOrForOfStatement();
+                case 75:
+                    return parseBreakOrContinueStatement(209);
+                case 70:
+                    return parseBreakOrContinueStatement(210);
+                case 94:
+                    return parseReturnStatement();
+                case 105:
+                    return parseWithStatement();
+                case 96:
+                    return parseSwitchStatement();
+                case 98:
+                    return parseThrowStatement();
+                case 100:
+                case 72:
+                case 85:
+                    return parseTryStatement();
+                case 76:
+                    return parseDebuggerStatement();
+                case 55:
+                    return parseDeclaration();
+                case 118:
+                case 107:
+                case 134:
+                case 125:
+                case 126:
+                case 122:
+                case 74:
+                case 81:
+                case 82:
+                case 89:
+                case 110:
+                case 111:
+                case 112:
+                case 115:
+                case 113:
+                case 128:
+                case 137:
+                    if (isStartOfDeclaration()) {
+                        return parseDeclaration();
+                    }
+                    break;
+            }
+            return parseExpressionOrLabeledStatement();
+        }
+        function parseDeclaration() {
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            switch (token) {
+                case 102:
+                case 108:
+                case 74:
+                    return parseVariableStatement(fullStart, decorators, modifiers);
+                case 87:
+                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
+                case 73:
+                    return parseClassDeclaration(fullStart, decorators, modifiers);
+                case 107:
+                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
+                case 134:
+                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
+                case 81:
+                    return parseEnumDeclaration(fullStart, decorators, modifiers);
+                case 137:
+                case 125:
+                case 126:
+                    return parseModuleDeclaration(fullStart, decorators, modifiers);
+                case 89:
+                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
+                case 82:
+                    nextToken();
+                    switch (token) {
+                        case 77:
+                        case 56:
+                            return parseExportAssignment(fullStart, decorators, modifiers);
+                        case 116:
+                            return parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers);
+                        default:
+                            return parseExportDeclaration(fullStart, decorators, modifiers);
+                    }
+                default:
+                    if (decorators || modifiers) {
+                        var node = createMissingNode(239, true, ts.Diagnostics.Declaration_expected);
+                        node.pos = fullStart;
+                        node.decorators = decorators;
+                        setModifiers(node, modifiers);
+                        return finishNode(node);
+                    }
+            }
+        }
+        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token === 9);
+        }
+        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
+            if (token !== 15 && canParseSemicolon()) {
+                parseSemicolon();
+                return;
+            }
+            return parseFunctionBlock(isGenerator, isAsync, false, diagnosticMessage);
+        }
+        function parseArrayBindingElement() {
+            if (token === 24) {
+                return createNode(193);
+            }
+            var node = createNode(169);
+            node.dotDotDotToken = parseOptionalToken(22);
+            node.name = parseIdentifierOrPattern();
+            node.initializer = parseBindingElementInitializer(false);
+            return finishNode(node);
+        }
+        function parseObjectBindingElement() {
+            var node = createNode(169);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            if (tokenIsIdentifier && token !== 54) {
+                node.name = propertyName;
+            }
+            else {
+                parseExpected(54);
+                node.propertyName = propertyName;
+                node.name = parseIdentifierOrPattern();
+            }
+            node.initializer = parseBindingElementInitializer(false);
+            return finishNode(node);
+        }
+        function parseObjectBindingPattern() {
+            var node = createNode(167);
+            parseExpected(15);
+            node.elements = parseDelimitedList(9, parseObjectBindingElement);
+            parseExpected(16);
+            return finishNode(node);
+        }
+        function parseArrayBindingPattern() {
+            var node = createNode(168);
+            parseExpected(19);
+            node.elements = parseDelimitedList(10, parseArrayBindingElement);
+            parseExpected(20);
+            return finishNode(node);
+        }
+        function isIdentifierOrPattern() {
+            return token === 15 || token === 19 || isIdentifier();
+        }
+        function parseIdentifierOrPattern() {
+            if (token === 19) {
+                return parseArrayBindingPattern();
+            }
+            if (token === 15) {
+                return parseObjectBindingPattern();
+            }
+            return parseIdentifier();
+        }
+        function parseVariableDeclaration() {
+            var node = createNode(218);
+            node.name = parseIdentifierOrPattern();
+            node.type = parseTypeAnnotation();
+            if (!isInOrOfKeyword(token)) {
+                node.initializer = parseInitializer(false);
+            }
+            return finishNode(node);
+        }
+        function parseVariableDeclarationList(inForStatementInitializer) {
+            var node = createNode(219);
+            switch (token) {
+                case 102:
+                    break;
+                case 108:
+                    node.flags |= 1024;
+                    break;
+                case 74:
+                    node.flags |= 2048;
+                    break;
+                default:
+                    ts.Debug.fail();
+            }
+            nextToken();
+            if (token === 138 && lookAhead(canFollowContextualOfKeyword)) {
+                node.declarations = createMissingList();
+            }
+            else {
+                var savedDisallowIn = inDisallowInContext();
+                setDisallowInContext(inForStatementInitializer);
+                node.declarations = parseDelimitedList(8, parseVariableDeclaration);
+                setDisallowInContext(savedDisallowIn);
+            }
+            return finishNode(node);
+        }
+        function canFollowContextualOfKeyword() {
+            return nextTokenIsIdentifier() && nextToken() === 18;
+        }
+        function parseVariableStatement(fullStart, decorators, modifiers) {
+            var node = createNode(200, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.declarationList = parseVariableDeclarationList(false);
+            parseSemicolon();
+            return addJSDocComment(finishNode(node));
+        }
+        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(220, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(87);
+            node.asteriskToken = parseOptionalToken(37);
+            node.name = node.flags & 512 ? parseOptionalIdentifier() : parseIdentifier();
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = !!(node.flags & 256);
+            fillSignature(54, isGenerator, isAsync, false, node);
+            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseConstructorDeclaration(pos, decorators, modifiers) {
+            var node = createNode(148, pos);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(121);
+            fillSignature(54, false, false, false, node);
+            node.body = parseFunctionBlockOrSemicolon(false, false, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
+            var method = createNode(147, fullStart);
+            method.decorators = decorators;
+            setModifiers(method, modifiers);
+            method.asteriskToken = asteriskToken;
+            method.name = name;
+            method.questionToken = questionToken;
+            var isGenerator = !!asteriskToken;
+            var isAsync = !!(method.flags & 256);
+            fillSignature(54, isGenerator, isAsync, false, method);
+            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
+            return addJSDocComment(finishNode(method));
+        }
+        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
+            var property = createNode(145, fullStart);
+            property.decorators = decorators;
+            setModifiers(property, modifiers);
+            property.name = name;
+            property.questionToken = questionToken;
+            property.type = parseTypeAnnotation();
+            property.initializer = modifiers && modifiers.flags & 32
+                ? allowInAnd(parseNonParameterInitializer)
+                : doOutsideOfContext(8388608 | 4194304, parseNonParameterInitializer);
+            parseSemicolon();
+            return finishNode(property);
+        }
+        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
+            var asteriskToken = parseOptionalToken(37);
+            var name = parsePropertyName();
+            var questionToken = parseOptionalToken(53);
+            if (asteriskToken || token === 17 || token === 25) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
+            }
+            else {
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
+            }
+        }
+        function parseNonParameterInitializer() {
+            return parseInitializer(false);
+        }
+        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.name = parsePropertyName();
+            fillSignature(54, false, false, false, node);
+            node.body = parseFunctionBlockOrSemicolon(false, false);
+            return finishNode(node);
+        }
+        function isClassMemberModifier(idToken) {
+            switch (idToken) {
+                case 112:
+                case 110:
+                case 111:
+                case 113:
+                case 128:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isClassMemberStart() {
+            var idToken;
+            if (token === 55) {
+                return true;
+            }
+            while (ts.isModifierKind(token)) {
+                idToken = token;
+                if (isClassMemberModifier(idToken)) {
+                    return true;
+                }
+                nextToken();
+            }
+            if (token === 37) {
+                return true;
+            }
+            if (isLiteralPropertyName()) {
+                idToken = token;
+                nextToken();
+            }
+            if (token === 19) {
+                return true;
+            }
+            if (idToken !== undefined) {
+                if (!ts.isKeyword(idToken) || idToken === 131 || idToken === 123) {
+                    return true;
+                }
+                switch (token) {
+                    case 17:
+                    case 25:
+                    case 54:
+                    case 56:
+                    case 53:
+                        return true;
+                    default:
+                        return canParseSemicolon();
+                }
+            }
+            return false;
+        }
+        function parseDecorators() {
+            var decorators;
+            while (true) {
+                var decoratorStart = getNodePos();
+                if (!parseOptional(55)) {
+                    break;
+                }
+                if (!decorators) {
+                    decorators = [];
+                    decorators.pos = decoratorStart;
+                }
+                var decorator = createNode(143, decoratorStart);
+                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
+                decorators.push(finishNode(decorator));
+            }
+            if (decorators) {
+                decorators.end = getNodeEnd();
+            }
+            return decorators;
+        }
+        function parseModifiers(permitInvalidConstAsModifier) {
+            var flags = 0;
+            var modifiers;
+            while (true) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token;
+                if (token === 74 && permitInvalidConstAsModifier) {
+                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
+                        break;
+                    }
+                }
+                else {
+                    if (!parseAnyContextualModifier()) {
+                        break;
+                    }
+                }
+                if (!modifiers) {
+                    modifiers = [];
+                    modifiers.pos = modifierStart;
+                }
+                flags |= ts.modifierToFlag(modifierKind);
+                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
+            }
+            if (modifiers) {
+                modifiers.flags = flags;
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
+        }
+        function parseModifiersForArrowFunction() {
+            var flags = 0;
+            var modifiers;
+            if (token === 118) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token;
+                nextToken();
+                modifiers = [];
+                modifiers.pos = modifierStart;
+                flags |= ts.modifierToFlag(modifierKind);
+                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
+                modifiers.flags = flags;
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
+        }
+        function parseClassElement() {
+            if (token === 23) {
+                var result = createNode(198);
+                nextToken();
+                return finishNode(result);
+            }
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers(true);
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
+            }
+            if (token === 121) {
+                return parseConstructorDeclaration(fullStart, decorators, modifiers);
+            }
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
+            }
+            if (ts.tokenIsIdentifierOrKeyword(token) ||
+                token === 9 ||
+                token === 8 ||
+                token === 37 ||
+                token === 19) {
+                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
+            }
+            if (decorators || modifiers) {
+                var name_7 = createMissingNode(69, true, ts.Diagnostics.Declaration_expected);
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_7, undefined);
+            }
+            ts.Debug.fail("Should not have attempted to parse class member declaration.");
+        }
+        function parseClassExpression() {
+            return parseClassDeclarationOrExpression(scanner.getStartPos(), undefined, undefined, 192);
+        }
+        function parseClassDeclaration(fullStart, decorators, modifiers) {
+            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 221);
+        }
+        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(73);
+            node.name = parseNameOfClassDeclarationOrExpression();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses(true);
+            if (parseExpected(15)) {
+                node.members = parseClassMembers();
+                parseExpected(16);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseNameOfClassDeclarationOrExpression() {
+            return isIdentifier() && !isImplementsClause()
+                ? parseIdentifier()
+                : undefined;
+        }
+        function isImplementsClause() {
+            return token === 106 && lookAhead(nextTokenIsIdentifierOrKeyword);
+        }
+        function parseHeritageClauses(isClassHeritageClause) {
+            if (isHeritageClause()) {
+                return parseList(20, parseHeritageClause);
+            }
+            return undefined;
+        }
+        function parseHeritageClause() {
+            if (token === 83 || token === 106) {
+                var node = createNode(251);
+                node.token = token;
+                nextToken();
+                node.types = parseDelimitedList(7, parseExpressionWithTypeArguments);
+                return finishNode(node);
+            }
+            return undefined;
+        }
+        function parseExpressionWithTypeArguments() {
+            var node = createNode(194);
+            node.expression = parseLeftHandSideExpressionOrHigher();
+            if (token === 25) {
+                node.typeArguments = parseBracketedList(18, parseType, 25, 27);
+            }
+            return finishNode(node);
+        }
+        function isHeritageClause() {
+            return token === 83 || token === 106;
+        }
+        function parseClassMembers() {
+            return parseList(5, parseClassElement);
+        }
+        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(222, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(107);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses(false);
+            node.members = parseObjectTypeMembers();
+            return finishNode(node);
+        }
+        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(223, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(134);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            parseExpected(56);
+            node.type = parseType();
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseEnumMember() {
+            var node = createNode(255, scanner.getStartPos());
+            node.name = parsePropertyName();
+            node.initializer = allowInAnd(parseNonParameterInitializer);
+            return finishNode(node);
+        }
+        function parseEnumDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(224, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(81);
+            node.name = parseIdentifier();
+            if (parseExpected(15)) {
+                node.members = parseDelimitedList(6, parseEnumMember);
+                parseExpected(16);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseModuleBlock() {
+            var node = createNode(226, scanner.getStartPos());
+            if (parseExpected(15)) {
+                node.statements = parseList(1, parseStatement);
+                parseExpected(16);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
+            var node = createNode(225, fullStart);
+            var namespaceFlag = flags & 4096;
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.flags |= flags;
+            node.name = parseIdentifier();
+            node.body = parseOptional(21)
+                ? parseModuleOrNamespaceDeclaration(getNodePos(), undefined, undefined, 1 | namespaceFlag)
+                : parseModuleBlock();
+            return finishNode(node);
+        }
+        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(225, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (token === 137) {
+                node.name = parseIdentifier();
+                node.flags |= 131072;
+            }
+            else {
+                node.name = parseLiteralNode(true);
+            }
+            node.body = parseModuleBlock();
+            return finishNode(node);
+        }
+        function parseModuleDeclaration(fullStart, decorators, modifiers) {
+            var flags = modifiers ? modifiers.flags : 0;
+            if (token === 137) {
+                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+            }
+            else if (parseOptional(126)) {
+                flags |= 4096;
+            }
+            else {
+                parseExpected(125);
+                if (token === 9) {
+                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+                }
+            }
+            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
+        }
+        function isExternalModuleReference() {
+            return token === 129 &&
+                lookAhead(nextTokenIsOpenParen);
+        }
+        function nextTokenIsOpenParen() {
+            return nextToken() === 17;
+        }
+        function nextTokenIsSlash() {
+            return nextToken() === 39;
+        }
+        function parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers) {
+            var exportDeclaration = createNode(228, fullStart);
+            exportDeclaration.decorators = decorators;
+            exportDeclaration.modifiers = modifiers;
+            parseExpected(116);
+            parseExpected(126);
+            exportDeclaration.name = parseIdentifier();
+            parseExpected(23);
+            return finishNode(exportDeclaration);
+        }
+        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
+            parseExpected(89);
+            var afterImportPos = scanner.getStartPos();
+            var identifier;
+            if (isIdentifier()) {
+                identifier = parseIdentifier();
+                if (token !== 24 && token !== 136) {
+                    var importEqualsDeclaration = createNode(229, fullStart);
+                    importEqualsDeclaration.decorators = decorators;
+                    setModifiers(importEqualsDeclaration, modifiers);
+                    importEqualsDeclaration.name = identifier;
+                    parseExpected(56);
+                    importEqualsDeclaration.moduleReference = parseModuleReference();
+                    parseSemicolon();
+                    return finishNode(importEqualsDeclaration);
+                }
+            }
+            var importDeclaration = createNode(230, fullStart);
+            importDeclaration.decorators = decorators;
+            setModifiers(importDeclaration, modifiers);
+            if (identifier ||
+                token === 37 ||
+                token === 15) {
+                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
+                parseExpected(136);
+            }
+            importDeclaration.moduleSpecifier = parseModuleSpecifier();
+            parseSemicolon();
+            return finishNode(importDeclaration);
+        }
+        function parseImportClause(identifier, fullStart) {
+            var importClause = createNode(231, fullStart);
+            if (identifier) {
+                importClause.name = identifier;
+            }
+            if (!importClause.name ||
+                parseOptional(24)) {
+                importClause.namedBindings = token === 37 ? parseNamespaceImport() : parseNamedImportsOrExports(233);
+            }
+            return finishNode(importClause);
+        }
+        function parseModuleReference() {
+            return isExternalModuleReference()
+                ? parseExternalModuleReference()
+                : parseEntityName(false);
+        }
+        function parseExternalModuleReference() {
+            var node = createNode(240);
+            parseExpected(129);
+            parseExpected(17);
+            node.expression = parseModuleSpecifier();
+            parseExpected(18);
+            return finishNode(node);
+        }
+        function parseModuleSpecifier() {
+            if (token === 9) {
+                var result = parseLiteralNode();
+                internIdentifier(result.text);
+                return result;
+            }
+            else {
+                return parseExpression();
+            }
+        }
+        function parseNamespaceImport() {
+            var namespaceImport = createNode(232);
+            parseExpected(37);
+            parseExpected(116);
+            namespaceImport.name = parseIdentifier();
+            return finishNode(namespaceImport);
+        }
+        function parseNamedImportsOrExports(kind) {
+            var node = createNode(kind);
+            node.elements = parseBracketedList(21, kind === 233 ? parseImportSpecifier : parseExportSpecifier, 15, 16);
+            return finishNode(node);
+        }
+        function parseExportSpecifier() {
+            return parseImportOrExportSpecifier(238);
+        }
+        function parseImportSpecifier() {
+            return parseImportOrExportSpecifier(234);
+        }
+        function parseImportOrExportSpecifier(kind) {
+            var node = createNode(kind);
+            var checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
+            var checkIdentifierStart = scanner.getTokenPos();
+            var checkIdentifierEnd = scanner.getTextPos();
+            var identifierName = parseIdentifierName();
+            if (token === 116) {
+                node.propertyName = identifierName;
+                parseExpected(116);
+                checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
+                checkIdentifierStart = scanner.getTokenPos();
+                checkIdentifierEnd = scanner.getTextPos();
+                node.name = parseIdentifierName();
+            }
+            else {
+                node.name = identifierName;
+            }
+            if (kind === 234 && checkIdentifierIsKeyword) {
+                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
+            }
+            return finishNode(node);
+        }
+        function parseExportDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(236, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (parseOptional(37)) {
+                parseExpected(136);
+                node.moduleSpecifier = parseModuleSpecifier();
+            }
+            else {
+                node.exportClause = parseNamedImportsOrExports(237);
+                if (token === 136 || (token === 9 && !scanner.hasPrecedingLineBreak())) {
+                    parseExpected(136);
+                    node.moduleSpecifier = parseModuleSpecifier();
+                }
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseExportAssignment(fullStart, decorators, modifiers) {
+            var node = createNode(235, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (parseOptional(56)) {
+                node.isExportEquals = true;
+            }
+            else {
+                parseExpected(77);
+            }
+            node.expression = parseAssignmentExpressionOrHigher();
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function processReferenceComments(sourceFile) {
+            var triviaScanner = ts.createScanner(sourceFile.languageVersion, false, 0, sourceText);
+            var referencedFiles = [];
+            var typeReferenceDirectives = [];
+            var amdDependencies = [];
+            var amdModuleName;
+            while (true) {
+                var kind = triviaScanner.scan();
+                if (kind !== 2) {
+                    if (ts.isTrivia(kind)) {
+                        continue;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                var range = { pos: triviaScanner.getTokenPos(), end: triviaScanner.getTextPos(), kind: triviaScanner.getToken() };
+                var comment = sourceText.substring(range.pos, range.end);
+                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
+                if (referencePathMatchResult) {
+                    var fileReference = referencePathMatchResult.fileReference;
+                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
+                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
+                    if (fileReference) {
+                        if (referencePathMatchResult.isTypeReferenceDirective) {
+                            typeReferenceDirectives.push(fileReference);
+                        }
+                        else {
+                            referencedFiles.push(fileReference);
+                        }
+                    }
+                    if (diagnosticMessage) {
+                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
+                    }
+                }
+                else {
+                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
+                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
+                    if (amdModuleNameMatchResult) {
+                        if (amdModuleName) {
+                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
+                        }
+                        amdModuleName = amdModuleNameMatchResult[2];
+                    }
+                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
+                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
+                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
+                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
+                    if (amdDependencyMatchResult) {
+                        var pathMatchResult = pathRegex.exec(comment);
+                        var nameMatchResult = nameRegex.exec(comment);
+                        if (pathMatchResult) {
+                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
+                            amdDependencies.push(amdDependency);
+                        }
+                    }
+                }
+            }
+            sourceFile.referencedFiles = referencedFiles;
+            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
+            sourceFile.amdDependencies = amdDependencies;
+            sourceFile.moduleName = amdModuleName;
+        }
+        function setExternalModuleIndicator(sourceFile) {
+            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
+                return node.flags & 1
+                    || node.kind === 229 && node.moduleReference.kind === 240
+                    || node.kind === 230
+                    || node.kind === 235
+                    || node.kind === 236
+                    ? node
+                    : undefined;
+            });
+        }
+        var JSDocParser;
+        (function (JSDocParser) {
+            function isJSDocType() {
+                switch (token) {
+                    case 37:
+                    case 53:
+                    case 17:
+                    case 19:
+                    case 49:
+                    case 15:
+                    case 87:
+                    case 22:
+                    case 92:
+                    case 97:
+                        return true;
+                }
+                return ts.tokenIsIdentifierOrKeyword(token);
+            }
+            JSDocParser.isJSDocType = isJSDocType;
+            function parseJSDocTypeExpressionForTests(content, start, length) {
+                initializeState("file.js", content, 2, undefined, 1);
+                scanner.setText(content, start, length);
+                token = scanner.scan();
+                var jsDocTypeExpression = parseJSDocTypeExpression();
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+            function parseJSDocTypeExpression() {
+                var result = createNode(257, scanner.getTokenPos());
+                parseExpected(15);
+                result.type = parseJSDocTopLevelType();
+                parseExpected(16);
+                fixupParentReferences(result);
+                return finishNode(result);
+            }
+            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
+            function parseJSDocTopLevelType() {
+                var type = parseJSDocType();
+                if (token === 47) {
+                    var unionType = createNode(261, type.pos);
+                    unionType.types = parseJSDocTypeList(type);
+                    type = finishNode(unionType);
+                }
+                if (token === 56) {
+                    var optionalType = createNode(268, type.pos);
+                    nextToken();
+                    optionalType.type = type;
+                    type = finishNode(optionalType);
+                }
+                return type;
+            }
+            function parseJSDocType() {
+                var type = parseBasicTypeExpression();
+                while (true) {
+                    if (token === 19) {
+                        var arrayType = createNode(260, type.pos);
+                        arrayType.elementType = type;
+                        nextToken();
+                        parseExpected(20);
+                        type = finishNode(arrayType);
+                    }
+                    else if (token === 53) {
+                        var nullableType = createNode(263, type.pos);
+                        nullableType.type = type;
+                        nextToken();
+                        type = finishNode(nullableType);
+                    }
+                    else if (token === 49) {
+                        var nonNullableType = createNode(264, type.pos);
+                        nonNullableType.type = type;
+                        nextToken();
+                        type = finishNode(nonNullableType);
+                    }
+                    else {
+                        break;
+                    }
+                }
+                return type;
+            }
+            function parseBasicTypeExpression() {
+                switch (token) {
+                    case 37:
+                        return parseJSDocAllType();
+                    case 53:
+                        return parseJSDocUnknownOrNullableType();
+                    case 17:
+                        return parseJSDocUnionType();
+                    case 19:
+                        return parseJSDocTupleType();
+                    case 49:
+                        return parseJSDocNonNullableType();
+                    case 15:
+                        return parseJSDocRecordType();
+                    case 87:
+                        return parseJSDocFunctionType();
+                    case 22:
+                        return parseJSDocVariadicType();
+                    case 92:
+                        return parseJSDocConstructorType();
+                    case 97:
+                        return parseJSDocThisType();
+                    case 117:
+                    case 132:
+                    case 130:
+                    case 120:
+                    case 133:
+                    case 103:
+                        return parseTokenNode();
+                }
+                return parseJSDocTypeReference();
+            }
+            function parseJSDocThisType() {
+                var result = createNode(272);
+                nextToken();
+                parseExpected(54);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocConstructorType() {
+                var result = createNode(271);
+                nextToken();
+                parseExpected(54);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocVariadicType() {
+                var result = createNode(270);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocFunctionType() {
+                var result = createNode(269);
+                nextToken();
+                parseExpected(17);
+                result.parameters = parseDelimitedList(22, parseJSDocParameter);
+                checkForTrailingComma(result.parameters);
+                parseExpected(18);
+                if (token === 54) {
+                    nextToken();
+                    result.type = parseJSDocType();
+                }
+                return finishNode(result);
+            }
+            function parseJSDocParameter() {
+                var parameter = createNode(142);
+                parameter.type = parseJSDocType();
+                if (parseOptional(56)) {
+                    parameter.questionToken = createNode(56);
+                }
+                return finishNode(parameter);
+            }
+            function parseJSDocTypeReference() {
+                var result = createNode(267);
+                result.name = parseSimplePropertyName();
+                if (token === 25) {
+                    result.typeArguments = parseTypeArguments();
+                }
+                else {
+                    while (parseOptional(21)) {
+                        if (token === 25) {
+                            result.typeArguments = parseTypeArguments();
+                            break;
+                        }
+                        else {
+                            result.name = parseQualifiedName(result.name);
+                        }
+                    }
+                }
+                return finishNode(result);
+            }
+            function parseTypeArguments() {
+                nextToken();
+                var typeArguments = parseDelimitedList(23, parseJSDocType);
+                checkForTrailingComma(typeArguments);
+                checkForEmptyTypeArgumentList(typeArguments);
+                parseExpected(27);
+                return typeArguments;
+            }
+            function checkForEmptyTypeArgumentList(typeArguments) {
+                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
+                    var start = typeArguments.pos - "<".length;
+                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
+                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+                }
+            }
+            function parseQualifiedName(left) {
+                var result = createNode(139, left.pos);
+                result.left = left;
+                result.right = parseIdentifierName();
+                return finishNode(result);
+            }
+            function parseJSDocRecordType() {
+                var result = createNode(265);
+                nextToken();
+                result.members = parseDelimitedList(24, parseJSDocRecordMember);
+                checkForTrailingComma(result.members);
+                parseExpected(16);
+                return finishNode(result);
+            }
+            function parseJSDocRecordMember() {
+                var result = createNode(266);
+                result.name = parseSimplePropertyName();
+                if (token === 54) {
+                    nextToken();
+                    result.type = parseJSDocType();
+                }
+                return finishNode(result);
+            }
+            function parseJSDocNonNullableType() {
+                var result = createNode(264);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocTupleType() {
+                var result = createNode(262);
+                nextToken();
+                result.types = parseDelimitedList(25, parseJSDocType);
+                checkForTrailingComma(result.types);
+                parseExpected(20);
+                return finishNode(result);
+            }
+            function checkForTrailingComma(list) {
+                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
+                    var start = list.end - ",".length;
+                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
+                }
+            }
+            function parseJSDocUnionType() {
+                var result = createNode(261);
+                nextToken();
+                result.types = parseJSDocTypeList(parseJSDocType());
+                parseExpected(18);
+                return finishNode(result);
+            }
+            function parseJSDocTypeList(firstType) {
+                ts.Debug.assert(!!firstType);
+                var types = [];
+                types.pos = firstType.pos;
+                types.push(firstType);
+                while (parseOptional(47)) {
+                    types.push(parseJSDocType());
+                }
+                types.end = scanner.getStartPos();
+                return types;
+            }
+            function parseJSDocAllType() {
+                var result = createNode(258);
+                nextToken();
+                return finishNode(result);
+            }
+            function parseJSDocUnknownOrNullableType() {
+                var pos = scanner.getStartPos();
+                nextToken();
+                if (token === 24 ||
+                    token === 16 ||
+                    token === 18 ||
+                    token === 27 ||
+                    token === 56 ||
+                    token === 47) {
+                    var result = createNode(259, pos);
+                    return finishNode(result);
+                }
+                else {
+                    var result = createNode(263, pos);
+                    result.type = parseJSDocType();
+                    return finishNode(result);
+                }
+            }
+            function parseIsolatedJSDocComment(content, start, length) {
+                initializeState("file.js", content, 2, undefined, 1);
+                sourceFile = { languageVariant: 0, text: content };
+                var jsDocComment = parseJSDocCommentWorker(start, length);
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDocComment ? { jsDocComment: jsDocComment, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+            function parseJSDocComment(parent, start, length) {
+                var saveToken = token;
+                var saveParseDiagnosticsLength = parseDiagnostics.length;
+                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+                var comment = parseJSDocCommentWorker(start, length);
+                if (comment) {
+                    comment.parent = parent;
+                }
+                token = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+                return comment;
+            }
+            JSDocParser.parseJSDocComment = parseJSDocComment;
+            function parseJSDocCommentWorker(start, length) {
+                var content = sourceText;
+                start = start || 0;
+                var end = length === undefined ? content.length : start + length;
+                length = end - start;
+                ts.Debug.assert(start >= 0);
+                ts.Debug.assert(start <= end);
+                ts.Debug.assert(end <= content.length);
+                var tags;
+                var result;
+                if (content.charCodeAt(start) === 47 &&
+                    content.charCodeAt(start + 1) === 42 &&
+                    content.charCodeAt(start + 2) === 42 &&
+                    content.charCodeAt(start + 3) !== 42) {
+                    scanner.scanRange(start + 3, length - 5, function () {
+                        var canParseTag = true;
+                        var seenAsterisk = true;
+                        nextJSDocToken();
+                        while (token !== 1) {
+                            switch (token) {
+                                case 55:
+                                    if (canParseTag) {
+                                        parseTag();
+                                    }
+                                    seenAsterisk = false;
+                                    break;
+                                case 4:
+                                    canParseTag = true;
+                                    seenAsterisk = false;
+                                    break;
+                                case 37:
+                                    if (seenAsterisk) {
+                                        canParseTag = false;
+                                    }
+                                    seenAsterisk = true;
+                                    break;
+                                case 69:
+                                    canParseTag = false;
+                                    break;
+                                case 1:
+                                    break;
+                            }
+                            nextJSDocToken();
+                        }
+                        result = createJSDocComment();
+                    });
+                }
+                return result;
+                function createJSDocComment() {
+                    if (!tags) {
+                        return undefined;
+                    }
+                    var result = createNode(273, start);
+                    result.tags = tags;
+                    return finishNode(result, end);
+                }
+                function skipWhitespace() {
+                    while (token === 5 || token === 4) {
+                        nextJSDocToken();
+                    }
+                }
+                function parseTag() {
+                    ts.Debug.assert(token === 55);
+                    var atToken = createNode(55, scanner.getTokenPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    if (!tagName) {
+                        return;
+                    }
+                    var tag = handleTag(atToken, tagName) || handleUnknownTag(atToken, tagName);
+                    addTag(tag);
+                }
+                function handleTag(atToken, tagName) {
+                    if (tagName) {
+                        switch (tagName.text) {
+                            case "param":
+                                return handleParamTag(atToken, tagName);
+                            case "return":
+                            case "returns":
+                                return handleReturnTag(atToken, tagName);
+                            case "template":
+                                return handleTemplateTag(atToken, tagName);
+                            case "type":
+                                return handleTypeTag(atToken, tagName);
+                            case "typedef":
+                                return handleTypedefTag(atToken, tagName);
+                        }
+                    }
+                    return undefined;
+                }
+                function handleUnknownTag(atToken, tagName) {
+                    var result = createNode(274, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    return finishNode(result);
+                }
+                function addTag(tag) {
+                    if (tag) {
+                        if (!tags) {
+                            tags = [];
+                            tags.pos = tag.pos;
+                        }
+                        tags.push(tag);
+                        tags.end = tag.end;
+                    }
+                }
+                function tryParseTypeExpression() {
+                    if (token !== 15) {
+                        return undefined;
+                    }
+                    var typeExpression = parseJSDocTypeExpression();
+                    return typeExpression;
+                }
+                function handleParamTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var name;
+                    var isBracketed;
+                    if (parseOptionalToken(19)) {
+                        name = parseJSDocIdentifierName();
+                        isBracketed = true;
+                        if (parseOptionalToken(56)) {
+                            parseExpression();
+                        }
+                        parseExpected(20);
+                    }
+                    else if (ts.tokenIsIdentifierOrKeyword(token)) {
+                        name = parseJSDocIdentifierName();
+                    }
+                    if (!name) {
+                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var preName, postName;
+                    if (typeExpression) {
+                        postName = name;
+                    }
+                    else {
+                        preName = name;
+                    }
+                    if (!typeExpression) {
+                        typeExpression = tryParseTypeExpression();
+                    }
+                    var result = createNode(275, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.preParameterName = preName;
+                    result.typeExpression = typeExpression;
+                    result.postParameterName = postName;
+                    result.isBracketed = isBracketed;
+                    return finishNode(result);
+                }
+                function handleReturnTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 276; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(276, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function handleTypeTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 277; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(277, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function handlePropertyTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var name = parseJSDocIdentifierName();
+                    if (!name) {
+                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var result = createNode(280, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.name = name;
+                    result.typeExpression = typeExpression;
+                    return finishNode(result);
+                }
+                function handleTypedefTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var typedefTag = createNode(279, atToken.pos);
+                    typedefTag.atToken = atToken;
+                    typedefTag.tagName = tagName;
+                    typedefTag.name = parseJSDocIdentifierName();
+                    typedefTag.typeExpression = typeExpression;
+                    if (typeExpression) {
+                        if (typeExpression.type.kind === 267) {
+                            var jsDocTypeReference = typeExpression.type;
+                            if (jsDocTypeReference.name.kind === 69) {
+                                var name_8 = jsDocTypeReference.name;
+                                if (name_8.text === "Object") {
+                                    typedefTag.jsDocTypeLiteral = scanChildTags();
+                                }
+                            }
+                        }
+                        if (!typedefTag.jsDocTypeLiteral) {
+                            typedefTag.jsDocTypeLiteral = typeExpression.type;
+                        }
+                    }
+                    else {
+                        typedefTag.jsDocTypeLiteral = scanChildTags();
+                    }
+                    return finishNode(typedefTag);
+                    function scanChildTags() {
+                        var jsDocTypeLiteral = createNode(281, scanner.getStartPos());
+                        var resumePos = scanner.getStartPos();
+                        var canParseTag = true;
+                        var seenAsterisk = false;
+                        var parentTagTerminated = false;
+                        while (token !== 1 && !parentTagTerminated) {
+                            nextJSDocToken();
+                            switch (token) {
+                                case 55:
+                                    if (canParseTag) {
+                                        parentTagTerminated = !tryParseChildTag(jsDocTypeLiteral);
+                                    }
+                                    seenAsterisk = false;
+                                    break;
+                                case 4:
+                                    resumePos = scanner.getStartPos() - 1;
+                                    canParseTag = true;
+                                    seenAsterisk = false;
+                                    break;
+                                case 37:
+                                    if (seenAsterisk) {
+                                        canParseTag = false;
+                                    }
+                                    seenAsterisk = true;
+                                    break;
+                                case 69:
+                                    canParseTag = false;
+                                case 1:
+                                    break;
+                            }
+                        }
+                        scanner.setTextPos(resumePos);
+                        return finishNode(jsDocTypeLiteral);
+                    }
+                }
+                function tryParseChildTag(parentTag) {
+                    ts.Debug.assert(token === 55);
+                    var atToken = createNode(55, scanner.getStartPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    if (!tagName) {
+                        return false;
+                    }
+                    switch (tagName.text) {
+                        case "type":
+                            if (parentTag.jsDocTypeTag) {
+                                return false;
+                            }
+                            parentTag.jsDocTypeTag = handleTypeTag(atToken, tagName);
+                            return true;
+                        case "prop":
+                        case "property":
+                            if (!parentTag.jsDocPropertyTags) {
+                                parentTag.jsDocPropertyTags = [];
+                            }
+                            var propertyTag = handlePropertyTag(atToken, tagName);
+                            parentTag.jsDocPropertyTags.push(propertyTag);
+                            return true;
+                    }
+                    return false;
+                }
+                function handleTemplateTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 278; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var typeParameters = [];
+                    typeParameters.pos = scanner.getStartPos();
+                    while (true) {
+                        var name_9 = parseJSDocIdentifierName();
+                        if (!name_9) {
+                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                            return undefined;
+                        }
+                        var typeParameter = createNode(141, name_9.pos);
+                        typeParameter.name = name_9;
+                        finishNode(typeParameter);
+                        typeParameters.push(typeParameter);
+                        if (token === 24) {
+                            nextJSDocToken();
+                        }
+                        else {
+                            break;
+                        }
+                    }
+                    var result = createNode(278, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeParameters = typeParameters;
+                    finishNode(result);
+                    typeParameters.end = result.end;
+                    return result;
+                }
+                function nextJSDocToken() {
+                    return token = scanner.scanJSDocToken();
+                }
+                function parseJSDocIdentifierName() {
+                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token));
+                }
+                function createJSDocIdentifier(isIdentifier) {
+                    if (!isIdentifier) {
+                        parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var pos = scanner.getTokenPos();
+                    var end = scanner.getTextPos();
+                    var result = createNode(69, pos);
+                    result.text = content.substring(pos, end);
+                    finishNode(result, end);
+                    nextJSDocToken();
+                    return result;
+                }
+            }
+            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
+        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
+    })(Parser || (Parser = {}));
+    var IncrementalParser;
+    (function (IncrementalParser) {
+        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2);
+            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
+            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
+                return sourceFile;
+            }
+            if (sourceFile.statements.length === 0) {
+                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, undefined, true, sourceFile.scriptKind);
+            }
+            var incrementalSourceFile = sourceFile;
+            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
+            incrementalSourceFile.hasBeenIncrementallyParsed = true;
+            var oldText = sourceFile.text;
+            var syntaxCursor = createSyntaxCursor(sourceFile);
+            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
+            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
+            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
+            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
+            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
+            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
+            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
+            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, true, sourceFile.scriptKind);
+            return result;
+        }
+        IncrementalParser.updateSourceFile = updateSourceFile;
+        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
+            if (isArray) {
+                visitArray(element);
+            }
+            else {
+                visitNode(element);
+            }
+            return;
+            function visitNode(node) {
+                var text = "";
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    text = oldText.substring(node.pos, node.end);
+                }
+                if (node._children) {
+                    node._children = undefined;
+                }
+                node.pos += delta;
+                node.end += delta;
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
+                }
+                forEachChild(node, visitNode, visitArray);
+                if (node.jsDocComments) {
+                    for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        forEachChild(jsDocComment, visitNode, visitArray);
+                    }
+                }
+                checkNodePositions(node, aggressiveChecks);
+            }
+            function visitArray(array) {
+                array._children = undefined;
+                array.pos += delta;
+                array.end += delta;
+                for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
+                    var node = array_7[_i];
+                    visitNode(node);
+                }
+            }
+        }
+        function shouldCheckNode(node) {
+            switch (node.kind) {
+                case 9:
+                case 8:
+                case 69:
+                    return true;
+            }
+            return false;
+        }
+        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
+            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
+            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
+            ts.Debug.assert(element.pos <= element.end);
+            element.pos = Math.min(element.pos, changeRangeNewEnd);
+            if (element.end >= changeRangeOldEnd) {
+                element.end += delta;
+            }
+            else {
+                element.end = Math.min(element.end, changeRangeNewEnd);
+            }
+            ts.Debug.assert(element.pos <= element.end);
+            if (element.parent) {
+                ts.Debug.assert(element.pos >= element.parent.pos);
+                ts.Debug.assert(element.end <= element.parent.end);
+            }
+        }
+        function checkNodePositions(node, aggressiveChecks) {
+            if (aggressiveChecks) {
+                var pos_2 = node.pos;
+                forEachChild(node, function (child) {
+                    ts.Debug.assert(child.pos >= pos_2);
+                    pos_2 = child.end;
+                });
+                ts.Debug.assert(pos_2 <= node.end);
+            }
+        }
+        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
+            visitNode(sourceFile);
+            return;
+            function visitNode(child) {
+                ts.Debug.assert(child.pos <= child.end);
+                if (child.pos > changeRangeOldEnd) {
+                    moveElementEntirelyPastChangeRange(child, false, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                var fullEnd = child.end;
+                if (fullEnd >= changeStart) {
+                    child.intersectsChange = true;
+                    child._children = undefined;
+                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    forEachChild(child, visitNode, visitArray);
+                    checkNodePositions(child, aggressiveChecks);
+                    return;
+                }
+                ts.Debug.assert(fullEnd < changeStart);
+            }
+            function visitArray(array) {
+                ts.Debug.assert(array.pos <= array.end);
+                if (array.pos > changeRangeOldEnd) {
+                    moveElementEntirelyPastChangeRange(array, true, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                var fullEnd = array.end;
+                if (fullEnd >= changeStart) {
+                    array.intersectsChange = true;
+                    array._children = undefined;
+                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
+                        var node = array_8[_i];
+                        visitNode(node);
+                    }
+                    return;
+                }
+                ts.Debug.assert(fullEnd < changeStart);
+            }
+        }
+        function extendToAffectedRange(sourceFile, changeRange) {
+            var maxLookahead = 1;
+            var start = changeRange.span.start;
+            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
+                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
+                ts.Debug.assert(nearestNode.pos <= start);
+                var position = nearestNode.pos;
+                start = Math.max(0, position - 1);
+            }
+            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
+            var finalLength = changeRange.newLength + (changeRange.span.start - start);
+            return ts.createTextChangeRange(finalSpan, finalLength);
+        }
+        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
+            var bestResult = sourceFile;
+            var lastNodeEntirelyBeforePosition;
+            forEachChild(sourceFile, visit);
+            if (lastNodeEntirelyBeforePosition) {
+                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
+                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
+                    bestResult = lastChildOfLastEntireNodeBeforePosition;
+                }
+            }
+            return bestResult;
+            function getLastChild(node) {
+                while (true) {
+                    var lastChild = getLastChildWorker(node);
+                    if (lastChild) {
+                        node = lastChild;
+                    }
+                    else {
+                        return node;
+                    }
+                }
+            }
+            function getLastChildWorker(node) {
+                var last = undefined;
+                forEachChild(node, function (child) {
+                    if (ts.nodeIsPresent(child)) {
+                        last = child;
+                    }
+                });
+                return last;
+            }
+            function visit(child) {
+                if (ts.nodeIsMissing(child)) {
+                    return;
+                }
+                if (child.pos <= position) {
+                    if (child.pos >= bestResult.pos) {
+                        bestResult = child;
+                    }
+                    if (position < child.end) {
+                        forEachChild(child, visit);
+                        return true;
+                    }
+                    else {
+                        ts.Debug.assert(child.end <= position);
+                        lastNodeEntirelyBeforePosition = child;
+                    }
+                }
+                else {
+                    ts.Debug.assert(child.pos > position);
+                    return true;
+                }
+            }
+        }
+        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            var oldText = sourceFile.text;
+            if (textChangeRange) {
+                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
+                if (aggressiveChecks || ts.Debug.shouldAssert(3)) {
+                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
+                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
+                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
+                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
+                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
+                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
+                }
+            }
+        }
+        function createSyntaxCursor(sourceFile) {
+            var currentArray = sourceFile.statements;
+            var currentArrayIndex = 0;
+            ts.Debug.assert(currentArrayIndex < currentArray.length);
+            var current = currentArray[currentArrayIndex];
+            var lastQueriedPosition = -1;
+            return {
+                currentNode: function (position) {
+                    if (position !== lastQueriedPosition) {
+                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
+                            currentArrayIndex++;
+                            current = currentArray[currentArrayIndex];
+                        }
+                        if (!current || current.pos !== position) {
+                            findHighestListElementThatStartsAtPosition(position);
+                        }
+                    }
+                    lastQueriedPosition = position;
+                    ts.Debug.assert(!current || current.pos === position);
+                    return current;
+                }
+            };
+            function findHighestListElementThatStartsAtPosition(position) {
+                currentArray = undefined;
+                currentArrayIndex = -1;
+                current = undefined;
+                forEachChild(sourceFile, visitNode, visitArray);
+                return;
+                function visitNode(node) {
+                    if (position >= node.pos && position < node.end) {
+                        forEachChild(node, visitNode, visitArray);
+                        return true;
+                    }
+                    return false;
+                }
+                function visitArray(array) {
+                    if (position >= array.pos && position < array.end) {
+                        for (var i = 0, n = array.length; i < n; i++) {
+                            var child = array[i];
+                            if (child) {
+                                if (child.pos === position) {
+                                    currentArray = array;
+                                    currentArrayIndex = i;
+                                    current = child;
+                                    return true;
+                                }
+                                else {
+                                    if (child.pos < position && position < child.end) {
+                                        forEachChild(child, visitNode, visitArray);
+                                        return true;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                    return false;
+                }
+            }
+        }
+    })(IncrementalParser || (IncrementalParser = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.bindTime = 0;
+    function getModuleInstanceState(node) {
+        if (node.kind === 222 || node.kind === 223) {
+            return 0;
+        }
+        else if (ts.isConstEnumDeclaration(node)) {
+            return 2;
+        }
+        else if ((node.kind === 230 || node.kind === 229) && !(node.flags & 1)) {
+            return 0;
+        }
+        else if (node.kind === 226) {
+            var state_1 = 0;
+            ts.forEachChild(node, function (n) {
+                switch (getModuleInstanceState(n)) {
+                    case 0:
+                        return false;
+                    case 2:
+                        state_1 = 2;
+                        return false;
+                    case 1:
+                        state_1 = 1;
+                        return true;
+                }
+            });
+            return state_1;
+        }
+        else if (node.kind === 225) {
+            return getModuleInstanceState(node.body);
+        }
+        else {
+            return 1;
+        }
+    }
+    ts.getModuleInstanceState = getModuleInstanceState;
+    var binder = createBinder();
+    function bindSourceFile(file, options) {
+        var start = new Date().getTime();
+        binder(file, options);
+        ts.bindTime += new Date().getTime() - start;
+    }
+    ts.bindSourceFile = bindSourceFile;
+    function createBinder() {
+        var file;
+        var options;
+        var languageVersion;
+        var parent;
+        var container;
+        var blockScopeContainer;
+        var lastContainer;
+        var seenThisKeyword;
+        var currentFlow;
+        var currentBreakTarget;
+        var currentContinueTarget;
+        var currentReturnTarget;
+        var currentTrueTarget;
+        var currentFalseTarget;
+        var preSwitchCaseFlow;
+        var activeLabels;
+        var hasExplicitReturn;
+        var emitFlags;
+        var inStrictMode;
+        var symbolCount = 0;
+        var Symbol;
+        var classifiableNames;
+        var unreachableFlow = { flags: 1 };
+        var reportedUnreachableFlow = { flags: 1 };
+        function bindSourceFile(f, opts) {
+            file = f;
+            options = opts;
+            languageVersion = ts.getEmitScriptTarget(options);
+            inStrictMode = !!file.externalModuleIndicator;
+            classifiableNames = {};
+            symbolCount = 0;
+            Symbol = ts.objectAllocator.getSymbolConstructor();
+            if (!file.locals) {
+                bind(file);
+                file.symbolCount = symbolCount;
+                file.classifiableNames = classifiableNames;
+            }
+            file = undefined;
+            options = undefined;
+            languageVersion = undefined;
+            parent = undefined;
+            container = undefined;
+            blockScopeContainer = undefined;
+            lastContainer = undefined;
+            seenThisKeyword = false;
+            currentFlow = undefined;
+            currentBreakTarget = undefined;
+            currentContinueTarget = undefined;
+            currentReturnTarget = undefined;
+            currentTrueTarget = undefined;
+            currentFalseTarget = undefined;
+            activeLabels = undefined;
+            hasExplicitReturn = false;
+            emitFlags = 0;
+        }
+        return bindSourceFile;
+        function createSymbol(flags, name) {
+            symbolCount++;
+            return new Symbol(flags, name);
+        }
+        function addDeclarationToSymbol(symbol, node, symbolFlags) {
+            symbol.flags |= symbolFlags;
+            node.symbol = symbol;
+            if (!symbol.declarations) {
+                symbol.declarations = [];
+            }
+            symbol.declarations.push(node);
+            if (symbolFlags & 1952 && !symbol.exports) {
+                symbol.exports = {};
+            }
+            if (symbolFlags & 6240 && !symbol.members) {
+                symbol.members = {};
+            }
+            if (symbolFlags & 107455) {
+                var valueDeclaration = symbol.valueDeclaration;
+                if (!valueDeclaration ||
+                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 225)) {
+                    symbol.valueDeclaration = node;
+                }
+            }
+        }
+        function getDeclarationName(node) {
+            if (node.name) {
+                if (ts.isAmbientModule(node)) {
+                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
+                }
+                if (node.name.kind === 140) {
+                    var nameExpression = node.name.expression;
+                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
+                        return nameExpression.text;
+                    }
+                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
+                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
+                }
+                return node.name.text;
+            }
+            switch (node.kind) {
+                case 148:
+                    return "__constructor";
+                case 156:
+                case 151:
+                    return "__call";
+                case 157:
+                case 152:
+                    return "__new";
+                case 153:
+                    return "__index";
+                case 236:
+                    return "__export";
+                case 235:
+                    return node.isExportEquals ? "export=" : "default";
+                case 187:
+                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
+                        case 2:
+                            return "export=";
+                        case 1:
+                        case 4:
+                            return node.left.name.text;
+                        case 3:
+                            return node.left.expression.name.text;
+                    }
+                    ts.Debug.fail("Unknown binary declaration kind");
+                    break;
+                case 220:
+                case 221:
+                    return node.flags & 512 ? "default" : undefined;
+                case 269:
+                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
+                case 142:
+                    ts.Debug.assert(node.parent.kind === 269);
+                    var functionType = node.parent;
+                    var index = ts.indexOf(functionType.parameters, node);
+                    return "p" + index;
+                case 279:
+                    var parentNode = node.parent && node.parent.parent;
+                    var nameFromParentNode = void 0;
+                    if (parentNode && parentNode.kind === 200) {
+                        if (parentNode.declarationList.declarations.length > 0) {
+                            var nameIdentifier = parentNode.declarationList.declarations[0].name;
+                            if (nameIdentifier.kind === 69) {
+                                nameFromParentNode = nameIdentifier.text;
+                            }
+                        }
+                    }
+                    return nameFromParentNode;
+            }
+        }
+        function getDisplayName(node) {
+            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
+        }
+        function declareSymbol(symbolTable, parent, node, includes, excludes) {
+            ts.Debug.assert(!ts.hasDynamicName(node));
+            var isDefaultExport = node.flags & 512;
+            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
+            var symbol;
+            if (name !== undefined) {
+                symbol = ts.hasProperty(symbolTable, name)
+                    ? symbolTable[name]
+                    : (symbolTable[name] = createSymbol(0, name));
+                if (name && (includes & 788448)) {
+                    classifiableNames[name] = name;
+                }
+                if (symbol.flags & excludes) {
+                    if (node.name) {
+                        node.name.parent = node;
+                    }
+                    var message_1 = symbol.flags & 2
+                        ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
+                        : ts.Diagnostics.Duplicate_identifier_0;
+                    ts.forEach(symbol.declarations, function (declaration) {
+                        if (declaration.flags & 512) {
+                            message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
+                        }
+                    });
+                    ts.forEach(symbol.declarations, function (declaration) {
+                        file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
+                    });
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
+                    symbol = createSymbol(0, name);
+                }
+            }
+            else {
+                symbol = createSymbol(0, "__missing");
+            }
+            addDeclarationToSymbol(symbol, node, includes);
+            symbol.parent = parent;
+            return symbol;
+        }
+        function declareModuleMember(node, symbolFlags, symbolExcludes) {
+            var hasExportModifier = ts.getCombinedNodeFlags(node) & 1;
+            if (symbolFlags & 8388608) {
+                if (node.kind === 238 || (node.kind === 229 && hasExportModifier)) {
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                }
+                else {
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                }
+            }
+            else {
+                if (!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 8192)) {
+                    var exportKind = (symbolFlags & 107455 ? 1048576 : 0) |
+                        (symbolFlags & 793056 ? 2097152 : 0) |
+                        (symbolFlags & 1536 ? 4194304 : 0);
+                    var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
+                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                    node.localSymbol = local;
+                    return local;
+                }
+                else {
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                }
+            }
+        }
+        function bindContainer(node, containerFlags) {
+            var saveContainer = container;
+            var savedBlockScopeContainer = blockScopeContainer;
+            if (containerFlags & 1) {
+                container = blockScopeContainer = node;
+                if (containerFlags & 32) {
+                    container.locals = {};
+                }
+                addToContainerChain(container);
+            }
+            else if (containerFlags & 2) {
+                blockScopeContainer = node;
+                blockScopeContainer.locals = undefined;
+            }
+            if (containerFlags & 4) {
+                var saveCurrentFlow = currentFlow;
+                var saveBreakTarget = currentBreakTarget;
+                var saveContinueTarget = currentContinueTarget;
+                var saveReturnTarget = currentReturnTarget;
+                var saveActiveLabels = activeLabels;
+                var saveHasExplicitReturn = hasExplicitReturn;
+                var isIIFE = containerFlags & 16 && !!ts.getImmediatelyInvokedFunctionExpression(node);
+                if (isIIFE) {
+                    currentReturnTarget = createBranchLabel();
+                }
+                else {
+                    currentFlow = { flags: 2 };
+                    if (containerFlags & 16) {
+                        currentFlow.container = node;
+                    }
+                    currentReturnTarget = undefined;
+                }
+                currentBreakTarget = undefined;
+                currentContinueTarget = undefined;
+                activeLabels = undefined;
+                hasExplicitReturn = false;
+                bindChildren(node);
+                node.flags &= ~4030464;
+                if (!(currentFlow.flags & 1) && containerFlags & 8 && ts.nodeIsPresent(node.body)) {
+                    node.flags |= 32768;
+                    if (hasExplicitReturn)
+                        node.flags |= 65536;
+                }
+                if (node.kind === 256) {
+                    node.flags |= emitFlags;
+                }
+                if (isIIFE) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                    currentFlow = finishFlowLabel(currentReturnTarget);
+                }
+                else {
+                    currentFlow = saveCurrentFlow;
+                }
+                currentBreakTarget = saveBreakTarget;
+                currentContinueTarget = saveContinueTarget;
+                currentReturnTarget = saveReturnTarget;
+                activeLabels = saveActiveLabels;
+                hasExplicitReturn = saveHasExplicitReturn;
+            }
+            else if (containerFlags & 64) {
+                seenThisKeyword = false;
+                bindChildren(node);
+                node.flags = seenThisKeyword ? node.flags | 16384 : node.flags & ~16384;
+            }
+            else {
+                bindChildren(node);
+            }
+            container = saveContainer;
+            blockScopeContainer = savedBlockScopeContainer;
+        }
+        function bindChildren(node) {
+            if (ts.isInJavaScriptFile(node) && node.jsDocComments) {
+                for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                    var jsDocComment = _a[_i];
+                    bind(jsDocComment);
+                }
+            }
+            if (checkUnreachable(node)) {
+                ts.forEachChild(node, bind);
+                return;
+            }
+            switch (node.kind) {
+                case 205:
+                    bindWhileStatement(node);
+                    break;
+                case 204:
+                    bindDoStatement(node);
+                    break;
+                case 206:
+                    bindForStatement(node);
+                    break;
+                case 207:
+                case 208:
+                    bindForInOrForOfStatement(node);
+                    break;
+                case 203:
+                    bindIfStatement(node);
+                    break;
+                case 211:
+                case 215:
+                    bindReturnOrThrow(node);
+                    break;
+                case 210:
+                case 209:
+                    bindBreakOrContinueStatement(node);
+                    break;
+                case 216:
+                    bindTryStatement(node);
+                    break;
+                case 213:
+                    bindSwitchStatement(node);
+                    break;
+                case 227:
+                    bindCaseBlock(node);
+                    break;
+                case 214:
+                    bindLabeledStatement(node);
+                    break;
+                case 185:
+                    bindPrefixUnaryExpressionFlow(node);
+                    break;
+                case 187:
+                    bindBinaryExpressionFlow(node);
+                    break;
+                case 181:
+                    bindDeleteExpressionFlow(node);
+                    break;
+                case 188:
+                    bindConditionalExpressionFlow(node);
+                    break;
+                case 218:
+                    bindVariableDeclarationFlow(node);
+                    break;
+                case 174:
+                    bindCallExpressionFlow(node);
+                    break;
+                default:
+                    ts.forEachChild(node, bind);
+                    break;
+            }
+        }
+        function isNarrowableReference(expr) {
+            return expr.kind === 69 ||
+                expr.kind === 97 ||
+                expr.kind === 172 && isNarrowableReference(expr.expression);
+        }
+        function isNarrowingExpression(expr) {
+            switch (expr.kind) {
+                case 69:
+                case 97:
+                case 172:
+                    return isNarrowableReference(expr);
+                case 174:
+                    return true;
+                case 178:
+                    return isNarrowingExpression(expr.expression);
+                case 187:
+                    return isNarrowingBinaryExpression(expr);
+                case 185:
+                    return expr.operator === 49 && isNarrowingExpression(expr.operand);
+            }
+            return false;
+        }
+        function isNarrowingBinaryExpression(expr) {
+            switch (expr.operatorToken.kind) {
+                case 56:
+                    return isNarrowableReference(expr.left);
+                case 30:
+                case 31:
+                case 32:
+                case 33:
+                    if (isNarrowingExpression(expr.left) && (expr.right.kind === 93 || expr.right.kind === 69)) {
+                        return true;
+                    }
+                    if (expr.left.kind === 182 && isNarrowingExpression(expr.left.expression) && expr.right.kind === 9) {
+                        return true;
+                    }
+                    return false;
+                case 91:
+                    return isNarrowingExpression(expr.left);
+                case 24:
+                    return isNarrowingExpression(expr.right);
+            }
+            return false;
+        }
+        function createBranchLabel() {
+            return {
+                flags: 4,
+                antecedents: undefined
+            };
+        }
+        function createLoopLabel() {
+            return {
+                flags: 8,
+                antecedents: undefined
+            };
+        }
+        function setFlowNodeReferenced(flow) {
+            flow.flags |= flow.flags & 128 ? 256 : 128;
+        }
+        function addAntecedent(label, antecedent) {
+            if (!(antecedent.flags & 1) && !ts.contains(label.antecedents, antecedent)) {
+                (label.antecedents || (label.antecedents = [])).push(antecedent);
+                setFlowNodeReferenced(antecedent);
+            }
+        }
+        function createFlowCondition(flags, antecedent, expression) {
+            if (antecedent.flags & 1) {
+                return antecedent;
+            }
+            if (!expression) {
+                return flags & 32 ? antecedent : unreachableFlow;
+            }
+            if (expression.kind === 99 && flags & 64 ||
+                expression.kind === 84 && flags & 32) {
+                return unreachableFlow;
+            }
+            if (!isNarrowingExpression(expression)) {
+                return antecedent;
+            }
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: flags,
+                antecedent: antecedent,
+                expression: expression
+            };
+        }
+        function createFlowAssignment(antecedent, node) {
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: 16,
+                antecedent: antecedent,
+                node: node
+            };
+        }
+        function finishFlowLabel(flow) {
+            var antecedents = flow.antecedents;
+            if (!antecedents) {
+                return unreachableFlow;
+            }
+            if (antecedents.length === 1) {
+                return antecedents[0];
+            }
+            return flow;
+        }
+        function isStatementCondition(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 203:
+                case 205:
+                case 204:
+                    return parent.expression === node;
+                case 206:
+                case 188:
+                    return parent.condition === node;
+            }
+            return false;
+        }
+        function isLogicalExpression(node) {
+            while (true) {
+                if (node.kind === 178) {
+                    node = node.expression;
+                }
+                else if (node.kind === 185 && node.operator === 49) {
+                    node = node.operand;
+                }
+                else {
+                    return node.kind === 187 && (node.operatorToken.kind === 51 ||
+                        node.operatorToken.kind === 52);
+                }
+            }
+        }
+        function isTopLevelLogicalExpression(node) {
+            while (node.parent.kind === 178 ||
+                node.parent.kind === 185 &&
+                    node.parent.operator === 49) {
+                node = node.parent;
+            }
+            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
+        }
+        function bindCondition(node, trueTarget, falseTarget) {
+            var saveTrueTarget = currentTrueTarget;
+            var saveFalseTarget = currentFalseTarget;
+            currentTrueTarget = trueTarget;
+            currentFalseTarget = falseTarget;
+            bind(node);
+            currentTrueTarget = saveTrueTarget;
+            currentFalseTarget = saveFalseTarget;
+            if (!node || !isLogicalExpression(node)) {
+                addAntecedent(trueTarget, createFlowCondition(32, currentFlow, node));
+                addAntecedent(falseTarget, createFlowCondition(64, currentFlow, node));
+            }
+        }
+        function bindIterativeStatement(node, breakTarget, continueTarget) {
+            var saveBreakTarget = currentBreakTarget;
+            var saveContinueTarget = currentContinueTarget;
+            currentBreakTarget = breakTarget;
+            currentContinueTarget = continueTarget;
+            bind(node);
+            currentBreakTarget = saveBreakTarget;
+            currentContinueTarget = saveContinueTarget;
+        }
+        function bindWhileStatement(node) {
+            var preWhileLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postWhileLabel = createBranchLabel();
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = preWhileLabel;
+            bindCondition(node.expression, preBodyLabel, postWhileLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = finishFlowLabel(postWhileLabel);
+        }
+        function bindDoStatement(node) {
+            var preDoLabel = createLoopLabel();
+            var preConditionLabel = createBranchLabel();
+            var postDoLabel = createBranchLabel();
+            addAntecedent(preDoLabel, currentFlow);
+            currentFlow = preDoLabel;
+            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
+            addAntecedent(preConditionLabel, currentFlow);
+            currentFlow = finishFlowLabel(preConditionLabel);
+            bindCondition(node.expression, preDoLabel, postDoLabel);
+            currentFlow = finishFlowLabel(postDoLabel);
+        }
+        function bindForStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postLoopLabel = createBranchLabel();
+            bind(node.initializer);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            bindCondition(node.condition, preBodyLabel, postLoopLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            bind(node.incrementor);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
+        }
+        function bindForInOrForOfStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var postLoopLabel = createBranchLabel();
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            bind(node.expression);
+            addAntecedent(postLoopLabel, currentFlow);
+            bind(node.initializer);
+            if (node.initializer.kind !== 219) {
+                bindAssignmentTargetFlow(node.initializer);
+            }
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
+        }
+        function bindIfStatement(node) {
+            var thenLabel = createBranchLabel();
+            var elseLabel = createBranchLabel();
+            var postIfLabel = createBranchLabel();
+            bindCondition(node.expression, thenLabel, elseLabel);
+            currentFlow = finishFlowLabel(thenLabel);
+            bind(node.thenStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(elseLabel);
+            bind(node.elseStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(postIfLabel);
+        }
+        function bindReturnOrThrow(node) {
+            bind(node.expression);
+            if (node.kind === 211) {
+                hasExplicitReturn = true;
+                if (currentReturnTarget) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                }
+            }
+            currentFlow = unreachableFlow;
+        }
+        function findActiveLabel(name) {
+            if (activeLabels) {
+                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
+                    var label = activeLabels_1[_i];
+                    if (label.name === name) {
+                        return label;
+                    }
+                }
+            }
+            return undefined;
+        }
+        function bindbreakOrContinueFlow(node, breakTarget, continueTarget) {
+            var flowLabel = node.kind === 210 ? breakTarget : continueTarget;
+            if (flowLabel) {
+                addAntecedent(flowLabel, currentFlow);
+                currentFlow = unreachableFlow;
+            }
+        }
+        function bindBreakOrContinueStatement(node) {
+            bind(node.label);
+            if (node.label) {
+                var activeLabel = findActiveLabel(node.label.text);
+                if (activeLabel) {
+                    activeLabel.referenced = true;
+                    bindbreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
+                }
+            }
+            else {
+                bindbreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
+            }
+        }
+        function bindTryStatement(node) {
+            var postFinallyLabel = createBranchLabel();
+            var preTryFlow = currentFlow;
+            bind(node.tryBlock);
+            addAntecedent(postFinallyLabel, currentFlow);
+            if (node.catchClause) {
+                currentFlow = preTryFlow;
+                bind(node.catchClause);
+                addAntecedent(postFinallyLabel, currentFlow);
+            }
+            if (node.finallyBlock) {
+                currentFlow = preTryFlow;
+                bind(node.finallyBlock);
+            }
+            currentFlow = finishFlowLabel(postFinallyLabel);
+        }
+        function bindSwitchStatement(node) {
+            var postSwitchLabel = createBranchLabel();
+            bind(node.expression);
+            var saveBreakTarget = currentBreakTarget;
+            var savePreSwitchCaseFlow = preSwitchCaseFlow;
+            currentBreakTarget = postSwitchLabel;
+            preSwitchCaseFlow = currentFlow;
+            bind(node.caseBlock);
+            addAntecedent(postSwitchLabel, currentFlow);
+            var hasNonEmptyDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 250 && c.statements.length; });
+            if (!hasNonEmptyDefault) {
+                addAntecedent(postSwitchLabel, preSwitchCaseFlow);
+            }
+            currentBreakTarget = saveBreakTarget;
+            preSwitchCaseFlow = savePreSwitchCaseFlow;
+            currentFlow = finishFlowLabel(postSwitchLabel);
+        }
+        function bindCaseBlock(node) {
+            var clauses = node.clauses;
+            for (var i = 0; i < clauses.length; i++) {
+                var clause = clauses[i];
+                if (clause.statements.length) {
+                    if (currentFlow.flags & 1) {
+                        currentFlow = preSwitchCaseFlow;
+                    }
+                    else {
+                        var preCaseLabel = createBranchLabel();
+                        addAntecedent(preCaseLabel, preSwitchCaseFlow);
+                        addAntecedent(preCaseLabel, currentFlow);
+                        currentFlow = finishFlowLabel(preCaseLabel);
+                    }
+                    bind(clause);
+                    if (!(currentFlow.flags & 1) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
+                        errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
+                    }
+                }
+                else {
+                    bind(clause);
+                }
+            }
+        }
+        function pushActiveLabel(name, breakTarget, continueTarget) {
+            var activeLabel = {
+                name: name,
+                breakTarget: breakTarget,
+                continueTarget: continueTarget,
+                referenced: false
+            };
+            (activeLabels || (activeLabels = [])).push(activeLabel);
+            return activeLabel;
+        }
+        function popActiveLabel() {
+            activeLabels.pop();
+        }
+        function bindLabeledStatement(node) {
+            var preStatementLabel = createLoopLabel();
+            var postStatementLabel = createBranchLabel();
+            bind(node.label);
+            addAntecedent(preStatementLabel, currentFlow);
+            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
+            bind(node.statement);
+            popActiveLabel();
+            if (!activeLabel.referenced && !options.allowUnusedLabels) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
+            }
+            addAntecedent(postStatementLabel, currentFlow);
+            currentFlow = finishFlowLabel(postStatementLabel);
+        }
+        function bindDestructuringTargetFlow(node) {
+            if (node.kind === 187 && node.operatorToken.kind === 56) {
+                bindAssignmentTargetFlow(node.left);
+            }
+            else {
+                bindAssignmentTargetFlow(node);
+            }
+        }
+        function bindAssignmentTargetFlow(node) {
+            if (isNarrowableReference(node)) {
+                currentFlow = createFlowAssignment(currentFlow, node);
+            }
+            else if (node.kind === 170) {
+                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
+                    var e = _a[_i];
+                    if (e.kind === 191) {
+                        bindAssignmentTargetFlow(e.expression);
+                    }
+                    else {
+                        bindDestructuringTargetFlow(e);
+                    }
+                }
+            }
+            else if (node.kind === 171) {
+                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
+                    var p = _c[_b];
+                    if (p.kind === 253) {
+                        bindDestructuringTargetFlow(p.initializer);
+                    }
+                    else if (p.kind === 254) {
+                        bindAssignmentTargetFlow(p.name);
+                    }
+                }
+            }
+        }
+        function bindLogicalExpression(node, trueTarget, falseTarget) {
+            var preRightLabel = createBranchLabel();
+            if (node.operatorToken.kind === 51) {
+                bindCondition(node.left, preRightLabel, falseTarget);
+            }
+            else {
+                bindCondition(node.left, trueTarget, preRightLabel);
+            }
+            currentFlow = finishFlowLabel(preRightLabel);
+            bind(node.operatorToken);
+            bindCondition(node.right, trueTarget, falseTarget);
+        }
+        function bindPrefixUnaryExpressionFlow(node) {
+            if (node.operator === 49) {
+                var saveTrueTarget = currentTrueTarget;
+                currentTrueTarget = currentFalseTarget;
+                currentFalseTarget = saveTrueTarget;
+                ts.forEachChild(node, bind);
+                currentFalseTarget = currentTrueTarget;
+                currentTrueTarget = saveTrueTarget;
+            }
+            else {
+                ts.forEachChild(node, bind);
+            }
+        }
+        function bindBinaryExpressionFlow(node) {
+            var operator = node.operatorToken.kind;
+            if (operator === 51 || operator === 52) {
+                if (isTopLevelLogicalExpression(node)) {
+                    var postExpressionLabel = createBranchLabel();
+                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
+                    currentFlow = finishFlowLabel(postExpressionLabel);
+                }
+                else {
+                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
+                }
+            }
+            else {
+                ts.forEachChild(node, bind);
+                if (operator === 56 && !ts.isAssignmentTarget(node)) {
+                    bindAssignmentTargetFlow(node.left);
+                }
+            }
+        }
+        function bindDeleteExpressionFlow(node) {
+            ts.forEachChild(node, bind);
+            if (node.expression.kind === 172) {
+                bindAssignmentTargetFlow(node.expression);
+            }
+        }
+        function bindConditionalExpressionFlow(node) {
+            var trueLabel = createBranchLabel();
+            var falseLabel = createBranchLabel();
+            var postExpressionLabel = createBranchLabel();
+            bindCondition(node.condition, trueLabel, falseLabel);
+            currentFlow = finishFlowLabel(trueLabel);
+            bind(node.whenTrue);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(falseLabel);
+            bind(node.whenFalse);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(postExpressionLabel);
+        }
+        function bindInitializedVariableFlow(node) {
+            var name = node.name;
+            if (ts.isBindingPattern(name)) {
+                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
+                    var child = _a[_i];
+                    bindInitializedVariableFlow(child);
+                }
+            }
+            else {
+                currentFlow = createFlowAssignment(currentFlow, node);
+            }
+        }
+        function bindVariableDeclarationFlow(node) {
+            ts.forEachChild(node, bind);
+            if (node.initializer || node.parent.parent.kind === 207 || node.parent.parent.kind === 208) {
+                bindInitializedVariableFlow(node);
+            }
+        }
+        function bindCallExpressionFlow(node) {
+            var expr = node.expression;
+            while (expr.kind === 178) {
+                expr = expr.expression;
+            }
+            if (expr.kind === 179 || expr.kind === 180) {
+                ts.forEach(node.typeArguments, bind);
+                ts.forEach(node.arguments, bind);
+                bind(node.expression);
+            }
+            else {
+                ts.forEachChild(node, bind);
+            }
+        }
+        function getContainerFlags(node) {
+            switch (node.kind) {
+                case 192:
+                case 221:
+                case 224:
+                case 171:
+                case 159:
+                case 281:
+                case 265:
+                    return 1;
+                case 222:
+                    return 1 | 64;
+                case 269:
+                case 225:
+                case 223:
+                    return 1 | 32;
+                case 256:
+                    return 1 | 4 | 32;
+                case 148:
+                case 220:
+                case 147:
+                case 146:
+                case 149:
+                case 150:
+                case 151:
+                case 152:
+                case 153:
+                case 156:
+                case 157:
+                    return 1 | 4 | 32 | 8;
+                case 179:
+                case 180:
+                    return 1 | 4 | 32 | 8 | 16;
+                case 226:
+                    return 4;
+                case 145:
+                    return node.initializer ? 4 : 0;
+                case 252:
+                case 206:
+                case 207:
+                case 208:
+                case 227:
+                    return 2;
+                case 199:
+                    return ts.isFunctionLike(node.parent) ? 0 : 2;
+            }
+            return 0;
+        }
+        function addToContainerChain(next) {
+            if (lastContainer) {
+                lastContainer.nextContainer = next;
+            }
+            lastContainer = next;
+        }
+        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
+            return declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
+        }
+        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
+            switch (container.kind) {
+                case 225:
+                    return declareModuleMember(node, symbolFlags, symbolExcludes);
+                case 256:
+                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
+                case 192:
+                case 221:
+                    return declareClassMember(node, symbolFlags, symbolExcludes);
+                case 224:
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                case 159:
+                case 171:
+                case 222:
+                case 265:
+                case 281:
+                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+                case 156:
+                case 157:
+                case 151:
+                case 152:
+                case 153:
+                case 147:
+                case 146:
+                case 148:
+                case 149:
+                case 150:
+                case 220:
+                case 179:
+                case 180:
+                case 269:
+                case 223:
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+            }
+        }
+        function declareClassMember(node, symbolFlags, symbolExcludes) {
+            return node.flags & 32
+                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
+                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+        }
+        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
+            return ts.isExternalModule(file)
+                ? declareModuleMember(node, symbolFlags, symbolExcludes)
+                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
+        }
+        function hasExportDeclarations(node) {
+            var body = node.kind === 256 ? node : node.body;
+            if (body.kind === 256 || body.kind === 226) {
+                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
+                    var stat = _a[_i];
+                    if (stat.kind === 236 || stat.kind === 235) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function setExportContextFlag(node) {
+            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
+                node.flags |= 8192;
+            }
+            else {
+                node.flags &= ~8192;
+            }
+        }
+        function bindModuleDeclaration(node) {
+            setExportContextFlag(node);
+            if (ts.isAmbientModule(node)) {
+                if (node.flags & 1) {
+                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    declareSymbolAndAddToSymbolTable(node, 1024, 0);
+                }
+                else {
+                    var pattern = void 0;
+                    if (node.name.kind === 9) {
+                        var text = node.name.text;
+                        if (ts.hasZeroOrOneAsteriskCharacter(text)) {
+                            pattern = ts.tryParsePattern(text);
+                        }
+                        else {
+                            errorOnFirstToken(node.name, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, text);
+                        }
+                    }
+                    var symbol = declareSymbolAndAddToSymbolTable(node, 512, 106639);
+                    if (pattern) {
+                        (file.patternAmbientModules || (file.patternAmbientModules = [])).push({ pattern: pattern, symbol: symbol });
+                    }
+                }
+            }
+            else {
+                var state = getModuleInstanceState(node);
+                if (state === 0) {
+                    declareSymbolAndAddToSymbolTable(node, 1024, 0);
+                }
+                else {
+                    declareSymbolAndAddToSymbolTable(node, 512, 106639);
+                    if (node.symbol.flags & (16 | 32 | 256)) {
+                        node.symbol.constEnumOnlyModule = false;
+                    }
+                    else {
+                        var currentModuleIsConstEnumOnly = state === 2;
+                        if (node.symbol.constEnumOnlyModule === undefined) {
+                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
+                        }
+                        else {
+                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
+                        }
+                    }
+                }
+            }
+        }
+        function bindFunctionOrConstructorType(node) {
+            var symbol = createSymbol(131072, getDeclarationName(node));
+            addDeclarationToSymbol(symbol, node, 131072);
+            var typeLiteralSymbol = createSymbol(2048, "__type");
+            addDeclarationToSymbol(typeLiteralSymbol, node, 2048);
+            typeLiteralSymbol.members = (_a = {}, _a[symbol.name] = symbol, _a);
+            var _a;
+        }
+        function bindObjectLiteralExpression(node) {
+            if (inStrictMode) {
+                var seen = {};
+                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (prop.name.kind !== 69) {
+                        continue;
+                    }
+                    var identifier = prop.name;
+                    var currentKind = prop.kind === 253 || prop.kind === 254 || prop.kind === 147
+                        ? 1
+                        : 2;
+                    var existingKind = seen[identifier.text];
+                    if (!existingKind) {
+                        seen[identifier.text] = currentKind;
+                        continue;
+                    }
+                    if (currentKind === 1 && existingKind === 1) {
+                        var span = ts.getErrorSpanForNode(file, identifier);
+                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
+                    }
+                }
+            }
+            return bindAnonymousDeclaration(node, 4096, "__object");
+        }
+        function bindAnonymousDeclaration(node, symbolFlags, name) {
+            var symbol = createSymbol(symbolFlags, name);
+            addDeclarationToSymbol(symbol, node, symbolFlags);
+        }
+        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
+            switch (blockScopeContainer.kind) {
+                case 225:
+                    declareModuleMember(node, symbolFlags, symbolExcludes);
+                    break;
+                case 256:
+                    if (ts.isExternalModule(container)) {
+                        declareModuleMember(node, symbolFlags, symbolExcludes);
+                        break;
+                    }
+                default:
+                    if (!blockScopeContainer.locals) {
+                        blockScopeContainer.locals = {};
+                        addToContainerChain(blockScopeContainer);
+                    }
+                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
+            }
+        }
+        function bindBlockScopedVariableDeclaration(node) {
+            bindBlockScopedDeclaration(node, 2, 107455);
+        }
+        function checkStrictModeIdentifier(node) {
+            if (inStrictMode &&
+                node.originalKeywordKind >= 106 &&
+                node.originalKeywordKind <= 114 &&
+                !ts.isIdentifierName(node) &&
+                !ts.isInAmbientContext(node)) {
+                if (!file.parseDiagnostics.length) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
+                }
+            }
+        }
+        function getStrictModeIdentifierMessage(node) {
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
+        }
+        function checkStrictModeBinaryExpression(node) {
+            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
+                checkStrictModeEvalOrArguments(node, node.left);
+            }
+        }
+        function checkStrictModeCatchClause(node) {
+            if (inStrictMode && node.variableDeclaration) {
+                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
+            }
+        }
+        function checkStrictModeDeleteExpression(node) {
+            if (inStrictMode && node.expression.kind === 69) {
+                var span = ts.getErrorSpanForNode(file, node.expression);
+                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
+            }
+        }
+        function isEvalOrArgumentsIdentifier(node) {
+            return node.kind === 69 &&
+                (node.text === "eval" || node.text === "arguments");
+        }
+        function checkStrictModeEvalOrArguments(contextNode, name) {
+            if (name && name.kind === 69) {
+                var identifier = name;
+                if (isEvalOrArgumentsIdentifier(identifier)) {
+                    var span = ts.getErrorSpanForNode(file, name);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
+                }
+            }
+        }
+        function getStrictModeEvalOrArgumentsMessage(node) {
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
+        }
+        function checkStrictModeFunctionName(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+        }
+        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
+        }
+        function checkStrictModeFunctionDeclaration(node) {
+            if (languageVersion < 2) {
+                if (blockScopeContainer.kind !== 256 &&
+                    blockScopeContainer.kind !== 225 &&
+                    !ts.isFunctionLike(blockScopeContainer)) {
+                    var errorSpan = ts.getErrorSpanForNode(file, node);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
+                }
+            }
+        }
+        function checkStrictModeNumericLiteral(node) {
+            if (inStrictMode && node.isOctalLiteral) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
+            }
+        }
+        function checkStrictModePostfixUnaryExpression(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.operand);
+            }
+        }
+        function checkStrictModePrefixUnaryExpression(node) {
+            if (inStrictMode) {
+                if (node.operator === 41 || node.operator === 42) {
+                    checkStrictModeEvalOrArguments(node, node.operand);
+                }
+            }
+        }
+        function checkStrictModeWithStatement(node) {
+            if (inStrictMode) {
+                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
+            }
+        }
+        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
+            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
+        }
+        function getDestructuringParameterName(node) {
+            return "__" + ts.indexOf(node.parent.parameters, node);
+        }
+        function bind(node) {
+            if (!node) {
+                return;
+            }
+            node.parent = parent;
+            var saveInStrictMode = inStrictMode;
+            bindWorker(node);
+            if (node.kind > 138) {
+                var saveParent = parent;
+                parent = node;
+                var containerFlags = getContainerFlags(node);
+                if (containerFlags === 0) {
+                    bindChildren(node);
+                }
+                else {
+                    bindContainer(node, containerFlags);
+                }
+                parent = saveParent;
+            }
+            inStrictMode = saveInStrictMode;
+        }
+        function updateStrictModeStatementList(statements) {
+            if (!inStrictMode) {
+                for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
+                    var statement = statements_1[_i];
+                    if (!ts.isPrologueDirective(statement)) {
+                        return;
+                    }
+                    if (isUseStrictPrologueDirective(statement)) {
+                        inStrictMode = true;
+                        return;
+                    }
+                }
+            }
+        }
+        function isUseStrictPrologueDirective(node) {
+            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
+            return nodeText === '"use strict"' || nodeText === "'use strict'";
+        }
+        function bindWorker(node) {
+            switch (node.kind) {
+                case 69:
+                case 97:
+                    if (currentFlow && (ts.isExpression(node) || parent.kind === 254)) {
+                        node.flowNode = currentFlow;
+                    }
+                    return checkStrictModeIdentifier(node);
+                case 172:
+                    if (currentFlow && isNarrowableReference(node)) {
+                        node.flowNode = currentFlow;
+                    }
+                    break;
+                case 187:
+                    if (ts.isInJavaScriptFile(node)) {
+                        var specialKind = ts.getSpecialPropertyAssignmentKind(node);
+                        switch (specialKind) {
+                            case 1:
+                                bindExportsPropertyAssignment(node);
+                                break;
+                            case 2:
+                                bindModuleExportsAssignment(node);
+                                break;
+                            case 3:
+                                bindPrototypePropertyAssignment(node);
+                                break;
+                            case 4:
+                                bindThisPropertyAssignment(node);
+                                break;
+                            case 0:
+                                break;
+                            default:
+                                ts.Debug.fail("Unknown special property assignment kind");
+                        }
+                    }
+                    return checkStrictModeBinaryExpression(node);
+                case 252:
+                    return checkStrictModeCatchClause(node);
+                case 181:
+                    return checkStrictModeDeleteExpression(node);
+                case 8:
+                    return checkStrictModeNumericLiteral(node);
+                case 186:
+                    return checkStrictModePostfixUnaryExpression(node);
+                case 185:
+                    return checkStrictModePrefixUnaryExpression(node);
+                case 212:
+                    return checkStrictModeWithStatement(node);
+                case 165:
+                    seenThisKeyword = true;
+                    return;
+                case 154:
+                    return checkTypePredicate(node);
+                case 141:
+                    return declareSymbolAndAddToSymbolTable(node, 262144, 530912);
+                case 142:
+                    return bindParameter(node);
+                case 218:
+                case 169:
+                    return bindVariableDeclarationOrBindingElement(node);
+                case 145:
+                case 144:
+                case 266:
+                    return bindPropertyOrMethodOrAccessor(node, 4 | (node.questionToken ? 536870912 : 0), 0);
+                case 280:
+                    return bindJSDocProperty(node);
+                case 253:
+                case 254:
+                    return bindPropertyOrMethodOrAccessor(node, 4, 0);
+                case 255:
+                    return bindPropertyOrMethodOrAccessor(node, 8, 107455);
+                case 247:
+                    emitFlags |= 1073741824;
+                    return;
+                case 151:
+                case 152:
+                case 153:
+                    return declareSymbolAndAddToSymbolTable(node, 131072, 0);
+                case 147:
+                case 146:
+                    return bindPropertyOrMethodOrAccessor(node, 8192 | (node.questionToken ? 536870912 : 0), ts.isObjectLiteralMethod(node) ? 0 : 99263);
+                case 220:
+                    return bindFunctionDeclaration(node);
+                case 148:
+                    return declareSymbolAndAddToSymbolTable(node, 16384, 0);
+                case 149:
+                    return bindPropertyOrMethodOrAccessor(node, 32768, 41919);
+                case 150:
+                    return bindPropertyOrMethodOrAccessor(node, 65536, 74687);
+                case 156:
+                case 157:
+                case 269:
+                    return bindFunctionOrConstructorType(node);
+                case 159:
+                case 281:
+                case 265:
+                    return bindAnonymousDeclaration(node, 2048, "__type");
+                case 171:
+                    return bindObjectLiteralExpression(node);
+                case 179:
+                case 180:
+                    return bindFunctionExpression(node);
+                case 174:
+                    if (ts.isInJavaScriptFile(node)) {
+                        bindCallExpression(node);
+                    }
+                    break;
+                case 192:
+                case 221:
+                    inStrictMode = true;
+                    return bindClassLikeDeclaration(node);
+                case 222:
+                    return bindBlockScopedDeclaration(node, 64, 792960);
+                case 279:
+                case 223:
+                    return bindBlockScopedDeclaration(node, 524288, 793056);
+                case 224:
+                    return bindEnumDeclaration(node);
+                case 225:
+                    return bindModuleDeclaration(node);
+                case 229:
+                case 232:
+                case 234:
+                case 238:
+                    return declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
+                case 228:
+                    return bindNamespaceExportDeclaration(node);
+                case 231:
+                    return bindImportClause(node);
+                case 236:
+                    return bindExportDeclaration(node);
+                case 235:
+                    return bindExportAssignment(node);
+                case 256:
+                    updateStrictModeStatementList(node.statements);
+                    return bindSourceFileIfExternalModule();
+                case 199:
+                    if (!ts.isFunctionLike(node.parent)) {
+                        return;
+                    }
+                case 226:
+                    return updateStrictModeStatementList(node.statements);
+            }
+        }
+        function checkTypePredicate(node) {
+            var parameterName = node.parameterName, type = node.type;
+            if (parameterName && parameterName.kind === 69) {
+                checkStrictModeIdentifier(parameterName);
+            }
+            if (parameterName && parameterName.kind === 165) {
+                seenThisKeyword = true;
+            }
+            bind(type);
+        }
+        function bindSourceFileIfExternalModule() {
+            setExportContextFlag(file);
+            if (ts.isExternalModule(file)) {
+                bindSourceFileAsExternalModule();
+            }
+        }
+        function bindSourceFileAsExternalModule() {
+            bindAnonymousDeclaration(file, 512, "\"" + ts.removeFileExtension(file.fileName) + "\"");
+        }
+        function bindExportAssignment(node) {
+            var boundExpression = node.kind === 235 ? node.expression : node.right;
+            if (!container.symbol || !container.symbol.exports) {
+                bindAnonymousDeclaration(node, 8388608, getDeclarationName(node));
+            }
+            else if (boundExpression.kind === 69 && node.kind === 235) {
+                declareSymbol(container.symbol.exports, container.symbol, node, 8388608, 0 | 8388608);
+            }
+            else {
+                declareSymbol(container.symbol.exports, container.symbol, node, 4, 0 | 8388608);
+            }
+        }
+        function bindNamespaceExportDeclaration(node) {
+            if (node.modifiers && node.modifiers.length) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
+            }
+            if (node.parent.kind !== 256) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
+                return;
+            }
+            else {
+                var parent_6 = node.parent;
+                if (!ts.isExternalModule(parent_6)) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
+                    return;
+                }
+                if (!parent_6.isDeclarationFile) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
+                    return;
+                }
+            }
+            file.symbol.globalExports = file.symbol.globalExports || {};
+            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608, 8388608);
+        }
+        function bindExportDeclaration(node) {
+            if (!container.symbol || !container.symbol.exports) {
+                bindAnonymousDeclaration(node, 1073741824, getDeclarationName(node));
+            }
+            else if (!node.exportClause) {
+                declareSymbol(container.symbol.exports, container.symbol, node, 1073741824, 0);
+            }
+        }
+        function bindImportClause(node) {
+            if (node.name) {
+                declareSymbolAndAddToSymbolTable(node, 8388608, 8388608);
+            }
+        }
+        function setCommonJsModuleIndicator(node) {
+            if (!file.commonJsModuleIndicator) {
+                file.commonJsModuleIndicator = node;
+                bindSourceFileAsExternalModule();
+            }
+        }
+        function bindExportsPropertyAssignment(node) {
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 | 7340032, 0);
+        }
+        function bindModuleExportsAssignment(node) {
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node, 4 | 7340032 | 512, 0);
+        }
+        function bindThisPropertyAssignment(node) {
+            var assignee;
+            if (container.kind === 220 || container.kind === 220) {
+                assignee = container;
+            }
+            else if (container.kind === 148) {
+                assignee = container.parent;
+            }
+            else {
+                return;
+            }
+            assignee.symbol.members = assignee.symbol.members || {};
+            declareSymbol(assignee.symbol.members, assignee.symbol, node, 4, 0 & ~4);
+        }
+        function bindPrototypePropertyAssignment(node) {
+            var leftSideOfAssignment = node.left;
+            var classPrototype = leftSideOfAssignment.expression;
+            var constructorFunction = classPrototype.expression;
+            leftSideOfAssignment.parent = node;
+            constructorFunction.parent = classPrototype;
+            classPrototype.parent = leftSideOfAssignment;
+            var funcSymbol = container.locals[constructorFunction.text];
+            if (!funcSymbol || !(funcSymbol.flags & 16)) {
+                return;
+            }
+            if (!funcSymbol.members) {
+                funcSymbol.members = {};
+            }
+            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4, 0);
+        }
+        function bindCallExpression(node) {
+            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, false)) {
+                setCommonJsModuleIndicator(node);
+            }
+        }
+        function bindClassLikeDeclaration(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.getClassExtendsHeritageClauseElement(node) !== undefined) {
+                    emitFlags |= 262144;
+                }
+                if (ts.nodeIsDecorated(node)) {
+                    emitFlags |= 524288;
+                }
+            }
+            if (node.kind === 221) {
+                bindBlockScopedDeclaration(node, 32, 899519);
+            }
+            else {
+                var bindingName = node.name ? node.name.text : "__class";
+                bindAnonymousDeclaration(node, 32, bindingName);
+                if (node.name) {
+                    classifiableNames[node.name.text] = node.name.text;
+                }
+            }
+            var symbol = node.symbol;
+            var prototypeSymbol = createSymbol(4 | 134217728, "prototype");
+            if (ts.hasProperty(symbol.exports, prototypeSymbol.name)) {
+                if (node.name) {
+                    node.name.parent = node;
+                }
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
+            }
+            symbol.exports[prototypeSymbol.name] = prototypeSymbol;
+            prototypeSymbol.parent = symbol;
+        }
+        function bindEnumDeclaration(node) {
+            return ts.isConst(node)
+                ? bindBlockScopedDeclaration(node, 128, 899967)
+                : bindBlockScopedDeclaration(node, 256, 899327);
+        }
+        function bindVariableDeclarationOrBindingElement(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (!ts.isBindingPattern(node.name)) {
+                if (ts.isBlockOrCatchScoped(node)) {
+                    bindBlockScopedVariableDeclaration(node);
+                }
+                else if (ts.isParameterDeclaration(node)) {
+                    declareSymbolAndAddToSymbolTable(node, 1, 107455);
+                }
+                else {
+                    declareSymbolAndAddToSymbolTable(node, 1, 107454);
+                }
+            }
+        }
+        function bindParameter(node) {
+            if (!ts.isDeclarationFile(file) &&
+                !ts.isInAmbientContext(node) &&
+                ts.nodeIsDecorated(node)) {
+                emitFlags |= (524288 | 1048576);
+            }
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (ts.isBindingPattern(node.name)) {
+                bindAnonymousDeclaration(node, 1, getDestructuringParameterName(node));
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 1, 107455);
+            }
+            if (ts.isParameterPropertyDeclaration(node)) {
+                var classDeclaration = node.parent.parent;
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 | (node.questionToken ? 536870912 : 0), 0);
+            }
+        }
+        function bindFunctionDeclaration(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152;
+                }
+            }
+            checkStrictModeFunctionName(node);
+            if (inStrictMode) {
+                checkStrictModeFunctionDeclaration(node);
+                bindBlockScopedDeclaration(node, 16, 106927);
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 16, 106927);
+            }
+        }
+        function bindFunctionExpression(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152;
+                }
+            }
+            if (currentFlow) {
+                node.flowNode = currentFlow;
+            }
+            checkStrictModeFunctionName(node);
+            var bindingName = node.name ? node.name.text : "__function";
+            return bindAnonymousDeclaration(node, 16, bindingName);
+        }
+        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152;
+                }
+                if (ts.nodeIsDecorated(node)) {
+                    emitFlags |= 524288;
+                }
+            }
+            return ts.hasDynamicName(node)
+                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
+                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
+        }
+        function bindJSDocProperty(node) {
+            return declareSymbolAndAddToSymbolTable(node, 4, 0);
+        }
+        function shouldReportErrorOnModuleDeclaration(node) {
+            var instanceState = getModuleInstanceState(node);
+            return instanceState === 1 || (instanceState === 2 && options.preserveConstEnums);
+        }
+        function checkUnreachable(node) {
+            if (!(currentFlow.flags & 1)) {
+                return false;
+            }
+            if (currentFlow === unreachableFlow) {
+                var reportError = (ts.isStatement(node) && node.kind !== 201) ||
+                    node.kind === 221 ||
+                    (node.kind === 225 && shouldReportErrorOnModuleDeclaration(node)) ||
+                    (node.kind === 224 && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
+                if (reportError) {
+                    currentFlow = reportedUnreachableFlow;
+                    var reportUnreachableCode = !options.allowUnreachableCode &&
+                        !ts.isInAmbientContext(node) &&
+                        (node.kind !== 200 ||
+                            ts.getCombinedNodeFlags(node.declarationList) & 3072 ||
+                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
+                    if (reportUnreachableCode) {
+                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
+                    }
+                }
+            }
+            return true;
+        }
+    }
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var nextSymbolId = 1;
+    var nextNodeId = 1;
+    var nextMergeId = 1;
+    var nextFlowId = 1;
+    function getNodeId(node) {
+        if (!node.id) {
+            node.id = nextNodeId;
+            nextNodeId++;
+        }
+        return node.id;
+    }
+    ts.getNodeId = getNodeId;
+    ts.checkTime = 0;
+    function getSymbolId(symbol) {
+        if (!symbol.id) {
+            symbol.id = nextSymbolId;
+            nextSymbolId++;
+        }
+        return symbol.id;
+    }
+    ts.getSymbolId = getSymbolId;
+    function createTypeChecker(host, produceDiagnostics) {
+        var cancellationToken;
+        var Symbol = ts.objectAllocator.getSymbolConstructor();
+        var Type = ts.objectAllocator.getTypeConstructor();
+        var Signature = ts.objectAllocator.getSignatureConstructor();
+        var typeCount = 0;
+        var symbolCount = 0;
+        var emptyArray = [];
+        var emptySymbols = {};
+        var compilerOptions = host.getCompilerOptions();
+        var languageVersion = compilerOptions.target || 0;
+        var modulekind = ts.getEmitModuleKind(compilerOptions);
+        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
+        var strictNullChecks = compilerOptions.strictNullChecks;
+        var emitResolver = createResolver();
+        var undefinedSymbol = createSymbol(4 | 67108864, "undefined");
+        undefinedSymbol.declarations = [];
+        var argumentsSymbol = createSymbol(4 | 67108864, "arguments");
+        var checker = {
+            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
+            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
+            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
+            getTypeCount: function () { return typeCount; },
+            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
+            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
+            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
+            getDiagnostics: getDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getTypeOfSymbolAtLocation: getTypeOfSymbolAtLocation,
+            getSymbolsOfParameterPropertyDeclaration: getSymbolsOfParameterPropertyDeclaration,
+            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
+            getPropertiesOfType: getPropertiesOfType,
+            getPropertyOfType: getPropertyOfType,
+            getSignaturesOfType: getSignaturesOfType,
+            getIndexTypeOfType: getIndexTypeOfType,
+            getBaseTypes: getBaseTypes,
+            getReturnTypeOfSignature: getReturnTypeOfSignature,
+            getNonNullableType: getNonNullableType,
+            getSymbolsInScope: getSymbolsInScope,
+            getSymbolAtLocation: getSymbolAtLocation,
+            getShorthandAssignmentValueSymbol: getShorthandAssignmentValueSymbol,
+            getExportSpecifierLocalTargetSymbol: getExportSpecifierLocalTargetSymbol,
+            getTypeAtLocation: getTypeOfNode,
+            getPropertySymbolOfDestructuringAssignment: getPropertySymbolOfDestructuringAssignment,
+            typeToString: typeToString,
+            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
+            symbolToString: symbolToString,
+            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
+            getRootSymbols: getRootSymbols,
+            getContextualType: getContextualType,
+            getFullyQualifiedName: getFullyQualifiedName,
+            getResolvedSignature: getResolvedSignature,
+            getConstantValue: getConstantValue,
+            isValidPropertyAccess: isValidPropertyAccess,
+            getSignatureFromDeclaration: getSignatureFromDeclaration,
+            isImplementationOfOverload: isImplementationOfOverload,
+            getAliasedSymbol: resolveAlias,
+            getEmitResolver: getEmitResolver,
+            getExportsOfModule: getExportsOfModuleAsArray,
+            getJsxElementAttributesType: getJsxElementAttributesType,
+            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
+            isOptionalParameter: isOptionalParameter
+        };
+        var unknownSymbol = createSymbol(4 | 67108864, "unknown");
+        var resolvingSymbol = createSymbol(67108864, "__resolving__");
+        var anyType = createIntrinsicType(1, "any");
+        var stringType = createIntrinsicType(2, "string");
+        var numberType = createIntrinsicType(4, "number");
+        var booleanType = createIntrinsicType(8, "boolean");
+        var esSymbolType = createIntrinsicType(16777216, "symbol");
+        var voidType = createIntrinsicType(16, "void");
+        var undefinedType = createIntrinsicType(32, "undefined");
+        var undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(32 | 2097152, "undefined");
+        var nullType = createIntrinsicType(64, "null");
+        var nullWideningType = strictNullChecks ? nullType : createIntrinsicType(64 | 2097152, "null");
+        var unknownType = createIntrinsicType(1, "unknown");
+        var neverType = createIntrinsicType(134217728, "never");
+        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        emptyGenericType.instantiations = {};
+        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        anyFunctionType.flags |= 8388608;
+        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, undefined, 0, false, false);
+        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, undefined, 0, false, false);
+        var enumNumberIndexInfo = createIndexInfo(stringType, true);
+        var globals = {};
+        var patternAmbientModules;
+        var getGlobalESSymbolConstructorSymbol;
+        var getGlobalPromiseConstructorSymbol;
+        var globalObjectType;
+        var globalFunctionType;
+        var globalArrayType;
+        var globalReadonlyArrayType;
+        var globalStringType;
+        var globalNumberType;
+        var globalBooleanType;
+        var globalRegExpType;
+        var anyArrayType;
+        var anyReadonlyArrayType;
+        var getGlobalTemplateStringsArrayType;
+        var getGlobalESSymbolType;
+        var getGlobalIterableType;
+        var getGlobalIteratorType;
+        var getGlobalIterableIteratorType;
+        var getGlobalClassDecoratorType;
+        var getGlobalParameterDecoratorType;
+        var getGlobalPropertyDecoratorType;
+        var getGlobalMethodDecoratorType;
+        var getGlobalTypedPropertyDescriptorType;
+        var getGlobalPromiseType;
+        var tryGetGlobalPromiseType;
+        var getGlobalPromiseLikeType;
+        var getInstantiatedGlobalPromiseLikeType;
+        var getGlobalPromiseConstructorLikeType;
+        var getGlobalThenableType;
+        var jsxElementClassType;
+        var deferredNodes;
+        var flowLoopStart = 0;
+        var flowLoopCount = 0;
+        var visitedFlowCount = 0;
+        var tupleTypes = {};
+        var unionTypes = {};
+        var intersectionTypes = {};
+        var stringLiteralTypes = {};
+        var resolutionTargets = [];
+        var resolutionResults = [];
+        var resolutionPropertyNames = [];
+        var mergedSymbols = [];
+        var symbolLinks = [];
+        var nodeLinks = [];
+        var flowLoopCaches = [];
+        var flowLoopNodes = [];
+        var flowLoopKeys = [];
+        var flowLoopTypes = [];
+        var visitedFlowNodes = [];
+        var visitedFlowTypes = [];
+        var potentialThisCollisions = [];
+        var awaitedTypeStack = [];
+        var diagnostics = ts.createDiagnosticCollection();
+        var typeofEQFacts = {
+            "string": 1,
+            "number": 2,
+            "boolean": 4,
+            "symbol": 8,
+            "undefined": 16384,
+            "object": 16,
+            "function": 32
+        };
+        var typeofNEFacts = {
+            "string": 128,
+            "number": 256,
+            "boolean": 512,
+            "symbol": 1024,
+            "undefined": 131072,
+            "object": 2048,
+            "function": 4096
+        };
+        var typeofTypesByName = {
+            "string": stringType,
+            "number": numberType,
+            "boolean": booleanType,
+            "symbol": esSymbolType,
+            "undefined": undefinedType
+        };
+        var jsxElementType;
+        var jsxTypes = {};
+        var JsxNames = {
+            JSX: "JSX",
+            IntrinsicElements: "IntrinsicElements",
+            ElementClass: "ElementClass",
+            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
+            Element: "Element",
+            IntrinsicAttributes: "IntrinsicAttributes",
+            IntrinsicClassAttributes: "IntrinsicClassAttributes"
+        };
+        var subtypeRelation = {};
+        var assignableRelation = {};
+        var comparableRelation = {};
+        var identityRelation = {};
+        var _displayBuilder;
+        var builtinGlobals = (_a = {},
+            _a[undefinedSymbol.name] = undefinedSymbol,
+            _a
+        );
+        initializeTypeChecker();
+        return checker;
+        function getEmitResolver(sourceFile, cancellationToken) {
+            getDiagnostics(sourceFile, cancellationToken);
+            return emitResolver;
+        }
+        function error(location, message, arg0, arg1, arg2) {
+            var diagnostic = location
+                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
+                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
+            diagnostics.add(diagnostic);
+        }
+        function createSymbol(flags, name) {
+            symbolCount++;
+            return new Symbol(flags, name);
+        }
+        function getExcludedSymbolFlags(flags) {
+            var result = 0;
+            if (flags & 2)
+                result |= 107455;
+            if (flags & 1)
+                result |= 107454;
+            if (flags & 4)
+                result |= 0;
+            if (flags & 8)
+                result |= 107455;
+            if (flags & 16)
+                result |= 106927;
+            if (flags & 32)
+                result |= 899519;
+            if (flags & 64)
+                result |= 792960;
+            if (flags & 256)
+                result |= 899327;
+            if (flags & 128)
+                result |= 899967;
+            if (flags & 512)
+                result |= 106639;
+            if (flags & 8192)
+                result |= 99263;
+            if (flags & 32768)
+                result |= 41919;
+            if (flags & 65536)
+                result |= 74687;
+            if (flags & 262144)
+                result |= 530912;
+            if (flags & 524288)
+                result |= 793056;
+            if (flags & 8388608)
+                result |= 8388608;
+            return result;
+        }
+        function recordMergedSymbol(target, source) {
+            if (!source.mergeId) {
+                source.mergeId = nextMergeId;
+                nextMergeId++;
+            }
+            mergedSymbols[source.mergeId] = target;
+        }
+        function cloneSymbol(symbol) {
+            var result = createSymbol(symbol.flags | 33554432, symbol.name);
+            result.declarations = symbol.declarations.slice(0);
+            result.parent = symbol.parent;
+            if (symbol.valueDeclaration)
+                result.valueDeclaration = symbol.valueDeclaration;
+            if (symbol.constEnumOnlyModule)
+                result.constEnumOnlyModule = true;
+            if (symbol.members)
+                result.members = cloneSymbolTable(symbol.members);
+            if (symbol.exports)
+                result.exports = cloneSymbolTable(symbol.exports);
+            recordMergedSymbol(result, symbol);
+            return result;
+        }
+        function mergeSymbol(target, source) {
+            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
+                if (source.flags & 512 && target.flags & 512 && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
+                    target.constEnumOnlyModule = false;
+                }
+                target.flags |= source.flags;
+                if (source.valueDeclaration &&
+                    (!target.valueDeclaration ||
+                        (target.valueDeclaration.kind === 225 && source.valueDeclaration.kind !== 225))) {
+                    target.valueDeclaration = source.valueDeclaration;
+                }
+                ts.forEach(source.declarations, function (node) {
+                    target.declarations.push(node);
+                });
+                if (source.members) {
+                    if (!target.members)
+                        target.members = {};
+                    mergeSymbolTable(target.members, source.members);
+                }
+                if (source.exports) {
+                    if (!target.exports)
+                        target.exports = {};
+                    mergeSymbolTable(target.exports, source.exports);
+                }
+                recordMergedSymbol(target, source);
+            }
+            else {
+                var message_2 = target.flags & 2 || source.flags & 2
+                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
+                ts.forEach(source.declarations, function (node) {
+                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                });
+                ts.forEach(target.declarations, function (node) {
+                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                });
+            }
+        }
+        function cloneSymbolTable(symbolTable) {
+            var result = {};
+            for (var id in symbolTable) {
+                if (ts.hasProperty(symbolTable, id)) {
+                    result[id] = symbolTable[id];
+                }
+            }
+            return result;
+        }
+        function mergeSymbolTable(target, source) {
+            for (var id in source) {
+                if (ts.hasProperty(source, id)) {
+                    if (!ts.hasProperty(target, id)) {
+                        target[id] = source[id];
+                    }
+                    else {
+                        var symbol = target[id];
+                        if (!(symbol.flags & 33554432)) {
+                            target[id] = symbol = cloneSymbol(symbol);
+                        }
+                        mergeSymbol(symbol, source[id]);
+                    }
+                }
+            }
+        }
+        function mergeModuleAugmentation(moduleName) {
+            var moduleAugmentation = moduleName.parent;
+            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
+                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
+                return;
+            }
+            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
+                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
+            }
+            else {
+                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
+                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
+                    : undefined;
+                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError);
+                if (!mainModule) {
+                    return;
+                }
+                mainModule = resolveExternalModuleSymbol(mainModule);
+                if (mainModule.flags & 1536) {
+                    mainModule = mainModule.flags & 33554432 ? mainModule : cloneSymbol(mainModule);
+                    mergeSymbol(mainModule, moduleAugmentation.symbol);
+                }
+                else {
+                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
+                }
+            }
+        }
+        function addToSymbolTable(target, source, message) {
+            for (var id in source) {
+                if (ts.hasProperty(source, id)) {
+                    if (ts.hasProperty(target, id)) {
+                        ts.forEach(target[id].declarations, addDeclarationDiagnostic(id, message));
+                    }
+                    else {
+                        target[id] = source[id];
+                    }
+                }
+            }
+            function addDeclarationDiagnostic(id, message) {
+                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
+            }
+        }
+        function getSymbolLinks(symbol) {
+            if (symbol.flags & 67108864)
+                return symbol;
+            var id = getSymbolId(symbol);
+            return symbolLinks[id] || (symbolLinks[id] = {});
+        }
+        function getNodeLinks(node) {
+            var nodeId = getNodeId(node);
+            return nodeLinks[nodeId] || (nodeLinks[nodeId] = {});
+        }
+        function isGlobalSourceFile(node) {
+            return node.kind === 256 && !ts.isExternalOrCommonJsModule(node);
+        }
+        function getSymbol(symbols, name, meaning) {
+            if (meaning && ts.hasProperty(symbols, name)) {
+                var symbol = symbols[name];
+                ts.Debug.assert((symbol.flags & 16777216) === 0, "Should never get an instantiated symbol here.");
+                if (symbol.flags & meaning) {
+                    return symbol;
+                }
+                if (symbol.flags & 8388608) {
+                    var target = resolveAlias(symbol);
+                    if (target === unknownSymbol || target.flags & meaning) {
+                        return symbol;
+                    }
+                }
+            }
+        }
+        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
+            var constructorDeclaration = parameter.parent;
+            var classDeclaration = parameter.parent.parent;
+            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455);
+            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455);
+            if (parameterSymbol && propertySymbol) {
+                return [parameterSymbol, propertySymbol];
+            }
+            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
+        }
+        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
+            var declarationFile = ts.getSourceFileOfNode(declaration);
+            var useFile = ts.getSourceFileOfNode(usage);
+            if (declarationFile !== useFile) {
+                if (modulekind || (!compilerOptions.outFile && !compilerOptions.out)) {
+                    return true;
+                }
+                var sourceFiles = host.getSourceFiles();
+                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
+            }
+            if (declaration.pos <= usage.pos) {
+                return declaration.kind !== 218 ||
+                    !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
+            }
+            return isUsedInFunctionOrNonStaticProperty(declaration, usage);
+            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
+                var container = ts.getEnclosingBlockScopeContainer(declaration);
+                switch (declaration.parent.parent.kind) {
+                    case 200:
+                    case 206:
+                    case 208:
+                        if (isSameScopeDescendentOf(usage, declaration, container)) {
+                            return true;
+                        }
+                        break;
+                }
+                switch (declaration.parent.parent.kind) {
+                    case 207:
+                    case 208:
+                        if (isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container)) {
+                            return true;
+                        }
+                }
+                return false;
+            }
+            function isUsedInFunctionOrNonStaticProperty(declaration, usage) {
+                var container = ts.getEnclosingBlockScopeContainer(declaration);
+                var current = usage;
+                while (current) {
+                    if (current === container) {
+                        return false;
+                    }
+                    if (ts.isFunctionLike(current)) {
+                        return true;
+                    }
+                    var initializerOfNonStaticProperty = current.parent &&
+                        current.parent.kind === 145 &&
+                        (current.parent.flags & 32) === 0 &&
+                        current.parent.initializer === current;
+                    if (initializerOfNonStaticProperty) {
+                        return true;
+                    }
+                    current = current.parent;
+                }
+                return false;
+            }
+        }
+        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg) {
+            var result;
+            var lastLocation;
+            var propertyWithInvalidInitializer;
+            var errorLocation = location;
+            var grandparent;
+            var isInExternalModule = false;
+            loop: while (location) {
+                if (location.locals && !isGlobalSourceFile(location)) {
+                    if (result = getSymbol(location.locals, name, meaning)) {
+                        var useResult = true;
+                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
+                            if (meaning & result.flags & 793056 && lastLocation.kind !== 273) {
+                                useResult = result.flags & 262144
+                                    ? lastLocation === location.type ||
+                                        lastLocation.kind === 142 ||
+                                        lastLocation.kind === 141
+                                    : false;
+                            }
+                            if (meaning & 107455 && result.flags & 1) {
+                                useResult =
+                                    lastLocation.kind === 142 ||
+                                        (lastLocation === location.type &&
+                                            result.valueDeclaration.kind === 142);
+                            }
+                        }
+                        if (useResult) {
+                            break loop;
+                        }
+                        else {
+                            result = undefined;
+                        }
+                    }
+                }
+                switch (location.kind) {
+                    case 256:
+                        if (!ts.isExternalOrCommonJsModule(location))
+                            break;
+                        isInExternalModule = true;
+                    case 225:
+                        var moduleExports = getSymbolOfNode(location).exports;
+                        if (location.kind === 256 || ts.isAmbientModule(location)) {
+                            if (result = moduleExports["default"]) {
+                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
+                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
+                                    break loop;
+                                }
+                                result = undefined;
+                            }
+                            if (ts.hasProperty(moduleExports, name) &&
+                                moduleExports[name].flags === 8388608 &&
+                                ts.getDeclarationOfKind(moduleExports[name], 238)) {
+                                break;
+                            }
+                        }
+                        if (result = getSymbol(moduleExports, name, meaning & 8914931)) {
+                            break loop;
+                        }
+                        break;
+                    case 224:
+                        if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & 8)) {
+                            break loop;
+                        }
+                        break;
+                    case 145:
+                    case 144:
+                        if (ts.isClassLike(location.parent) && !(location.flags & 32)) {
+                            var ctor = findConstructorDeclaration(location.parent);
+                            if (ctor && ctor.locals) {
+                                if (getSymbol(ctor.locals, name, meaning & 107455)) {
+                                    propertyWithInvalidInitializer = location;
+                                }
+                            }
+                        }
+                        break;
+                    case 221:
+                    case 192:
+                    case 222:
+                        if (result = getSymbol(getSymbolOfNode(location).members, name, meaning & 793056)) {
+                            if (lastLocation && lastLocation.flags & 32) {
+                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
+                                return undefined;
+                            }
+                            break loop;
+                        }
+                        if (location.kind === 192 && meaning & 32) {
+                            var className = location.name;
+                            if (className && name === className.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    case 140:
+                        grandparent = location.parent.parent;
+                        if (ts.isClassLike(grandparent) || grandparent.kind === 222) {
+                            if (result = getSymbol(getSymbolOfNode(grandparent).members, name, meaning & 793056)) {
+                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
+                                return undefined;
+                            }
+                        }
+                        break;
+                    case 147:
+                    case 146:
+                    case 148:
+                    case 149:
+                    case 150:
+                    case 220:
+                    case 180:
+                        if (meaning & 3 && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        break;
+                    case 179:
+                        if (meaning & 3 && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        if (meaning & 16) {
+                            var functionName = location.name;
+                            if (functionName && name === functionName.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    case 143:
+                        if (location.parent && location.parent.kind === 142) {
+                            location = location.parent;
+                        }
+                        if (location.parent && ts.isClassElement(location.parent)) {
+                            location = location.parent;
+                        }
+                        break;
+                }
+                lastLocation = location;
+                location = location.parent;
+            }
+            if (!result) {
+                result = getSymbol(globals, name, meaning);
+            }
+            if (!result) {
+                if (nameNotFoundMessage) {
+                    if (!checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg)) {
+                        error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                    }
+                }
+                return undefined;
+            }
+            if (nameNotFoundMessage) {
+                if (propertyWithInvalidInitializer) {
+                    var propertyName = propertyWithInvalidInitializer.name;
+                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                    return undefined;
+                }
+                if (meaning & 2) {
+                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
+                    if (exportOrLocalSymbol.flags & 2) {
+                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
+                    }
+                }
+                if (result && isInExternalModule) {
+                    var decls = result.declarations;
+                    if (decls && decls.length === 1 && decls[0].kind === 228) {
+                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
+                    }
+                }
+            }
+            return result;
+        }
+        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
+            if (!errorLocation || (errorLocation.kind === 69 && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
+                return false;
+            }
+            var container = ts.getThisContainer(errorLocation, true);
+            var location = container;
+            while (location) {
+                if (ts.isClassLike(location.parent)) {
+                    var classSymbol = getSymbolOfNode(location.parent);
+                    if (!classSymbol) {
+                        break;
+                    }
+                    var constructorType = getTypeOfSymbol(classSymbol);
+                    if (getPropertyOfType(constructorType, name)) {
+                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
+                        return true;
+                    }
+                    if (location === container && !(location.flags & 32)) {
+                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
+                        if (getPropertyOfType(instanceType, name)) {
+                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                            return true;
+                        }
+                    }
+                }
+                location = location.parent;
+            }
+            return false;
+        }
+        function checkResolvedBlockScopedVariable(result, errorLocation) {
+            ts.Debug.assert((result.flags & 2) !== 0);
+            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) ? d : undefined; });
+            ts.Debug.assert(declaration !== undefined, "Block-scoped variable declaration is undefined");
+            if (!isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 218), errorLocation)) {
+                error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+            }
+        }
+        function isSameScopeDescendentOf(initial, parent, stopAt) {
+            if (!parent) {
+                return false;
+            }
+            for (var current = initial; current && current !== stopAt && !ts.isFunctionLike(current); current = current.parent) {
+                if (current === parent) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function getAnyImportSyntax(node) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                if (node.kind === 229) {
+                    return node;
+                }
+                while (node && node.kind !== 230) {
+                    node = node.parent;
+                }
+                return node;
+            }
+        }
+        function getDeclarationOfAliasSymbol(symbol) {
+            return ts.forEach(symbol.declarations, function (d) { return ts.isAliasSymbolDeclaration(d) ? d : undefined; });
+        }
+        function getTargetOfImportEqualsDeclaration(node) {
+            if (node.moduleReference.kind === 240) {
+                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
+            }
+            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, node);
+        }
+        function getTargetOfImportClause(node) {
+            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
+            if (moduleSymbol) {
+                var exportDefaultSymbol = moduleSymbol.exports["export="] ?
+                    getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
+                    resolveSymbol(moduleSymbol.exports["default"]);
+                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
+                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
+                }
+                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
+                    return resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
+                }
+                return exportDefaultSymbol;
+            }
+        }
+        function getTargetOfNamespaceImport(node) {
+            var moduleSpecifier = node.parent.parent.moduleSpecifier;
+            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier);
+        }
+        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
+            if (valueSymbol.flags & (793056 | 1536)) {
+                return valueSymbol;
+            }
+            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
+            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
+            result.parent = valueSymbol.parent || typeSymbol.parent;
+            if (valueSymbol.valueDeclaration)
+                result.valueDeclaration = valueSymbol.valueDeclaration;
+            if (typeSymbol.members)
+                result.members = typeSymbol.members;
+            if (valueSymbol.exports)
+                result.exports = valueSymbol.exports;
+            return result;
+        }
+        function getExportOfModule(symbol, name) {
+            if (symbol.flags & 1536) {
+                var exports = getExportsOfSymbol(symbol);
+                if (ts.hasProperty(exports, name)) {
+                    return resolveSymbol(exports[name]);
+                }
+            }
+        }
+        function getPropertyOfVariable(symbol, name) {
+            if (symbol.flags & 3) {
+                var typeAnnotation = symbol.valueDeclaration.type;
+                if (typeAnnotation) {
+                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
+                }
+            }
+        }
+        function getExternalModuleMember(node, specifier) {
+            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier);
+            if (targetSymbol) {
+                var name_10 = specifier.propertyName || specifier.name;
+                if (name_10.text) {
+                    var symbolFromVariable = void 0;
+                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
+                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_10.text);
+                    }
+                    else {
+                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_10.text);
+                    }
+                    symbolFromVariable = resolveSymbol(symbolFromVariable);
+                    var symbolFromModule = getExportOfModule(targetSymbol, name_10.text);
+                    var symbol = symbolFromModule && symbolFromVariable ?
+                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
+                        symbolFromModule || symbolFromVariable;
+                    if (!symbol) {
+                        error(name_10, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_10));
+                    }
+                    return symbol;
+                }
+            }
+        }
+        function getTargetOfImportSpecifier(node) {
+            return getExternalModuleMember(node.parent.parent.parent, node);
+        }
+        function getTargetOfGlobalModuleExportDeclaration(node) {
+            return resolveExternalModuleSymbol(node.parent.symbol);
+        }
+        function getTargetOfExportSpecifier(node) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node) :
+                resolveEntityName(node.propertyName || node.name, 107455 | 793056 | 1536);
+        }
+        function getTargetOfExportAssignment(node) {
+            return resolveEntityName(node.expression, 107455 | 793056 | 1536);
+        }
+        function getTargetOfAliasDeclaration(node) {
+            switch (node.kind) {
+                case 229:
+                    return getTargetOfImportEqualsDeclaration(node);
+                case 231:
+                    return getTargetOfImportClause(node);
+                case 232:
+                    return getTargetOfNamespaceImport(node);
+                case 234:
+                    return getTargetOfImportSpecifier(node);
+                case 238:
+                    return getTargetOfExportSpecifier(node);
+                case 235:
+                    return getTargetOfExportAssignment(node);
+                case 228:
+                    return getTargetOfGlobalModuleExportDeclaration(node);
+            }
+        }
+        function resolveSymbol(symbol) {
+            return symbol && symbol.flags & 8388608 && !(symbol.flags & (107455 | 793056 | 1536)) ? resolveAlias(symbol) : symbol;
+        }
+        function resolveAlias(symbol) {
+            ts.Debug.assert((symbol.flags & 8388608) !== 0, "Should only get Alias here.");
+            var links = getSymbolLinks(symbol);
+            if (!links.target) {
+                links.target = resolvingSymbol;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                var target = getTargetOfAliasDeclaration(node);
+                if (links.target === resolvingSymbol) {
+                    links.target = target || unknownSymbol;
+                }
+                else {
+                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
+                }
+            }
+            else if (links.target === resolvingSymbol) {
+                links.target = unknownSymbol;
+            }
+            return links.target;
+        }
+        function markExportAsReferenced(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target) {
+                var markAlias = target === unknownSymbol ||
+                    ((target.flags & 107455) && !isConstEnumOrConstEnumOnlyModule(target));
+                if (markAlias) {
+                    markAliasSymbolAsReferenced(symbol);
+                }
+            }
+        }
+        function markAliasSymbolAsReferenced(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.referenced) {
+                links.referenced = true;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                if (node.kind === 235) {
+                    checkExpressionCached(node.expression);
+                }
+                else if (node.kind === 238) {
+                    checkExpressionCached(node.propertyName || node.name);
+                }
+                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    checkExpressionCached(node.moduleReference);
+                }
+            }
+        }
+        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importDeclaration, dontResolveAlias) {
+            if (entityName.kind === 69 && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            if (entityName.kind === 69 || entityName.parent.kind === 139) {
+                return resolveEntityName(entityName, 1536, false, dontResolveAlias);
+            }
+            else {
+                ts.Debug.assert(entityName.parent.kind === 229);
+                return resolveEntityName(entityName, 107455 | 793056 | 1536, false, dontResolveAlias);
+            }
+        }
+        function getFullyQualifiedName(symbol) {
+            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
+        }
+        function resolveEntityName(name, meaning, ignoreErrors, dontResolveAlias) {
+            if (ts.nodeIsMissing(name)) {
+                return undefined;
+            }
+            var symbol;
+            if (name.kind === 69) {
+                var message = meaning === 1536 ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
+                symbol = resolveName(name, name.text, meaning, ignoreErrors ? undefined : message, name);
+                if (!symbol) {
+                    return undefined;
+                }
+            }
+            else if (name.kind === 139 || name.kind === 172) {
+                var left = name.kind === 139 ? name.left : name.expression;
+                var right = name.kind === 139 ? name.right : name.name;
+                var namespace = resolveEntityName(left, 1536, ignoreErrors);
+                if (!namespace || namespace === unknownSymbol || ts.nodeIsMissing(right)) {
+                    return undefined;
+                }
+                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
+                if (!symbol) {
+                    if (!ignoreErrors) {
+                        error(right, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
+                    }
+                    return undefined;
+                }
+            }
+            else {
+                ts.Debug.fail("Unknown entity name kind.");
+            }
+            ts.Debug.assert((symbol.flags & 16777216) === 0, "Should never get an instantiated symbol here.");
+            return (symbol.flags & meaning) || dontResolveAlias ? symbol : resolveAlias(symbol);
+        }
+        function resolveExternalModuleName(location, moduleReferenceExpression) {
+            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
+        }
+        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError) {
+            if (moduleReferenceExpression.kind !== 9) {
+                return;
+            }
+            var moduleReferenceLiteral = moduleReferenceExpression;
+            var moduleName = ts.escapeIdentifier(moduleReferenceLiteral.text);
+            if (moduleName === undefined) {
+                return;
+            }
+            var isRelative = ts.isExternalModuleNameRelative(moduleName);
+            if (!isRelative) {
+                var symbol = getSymbol(globals, '"' + moduleName + '"', 512);
+                if (symbol) {
+                    return getMergedSymbol(symbol);
+                }
+            }
+            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReferenceLiteral.text);
+            var sourceFile = resolvedModule && host.getSourceFile(resolvedModule.resolvedFileName);
+            if (sourceFile) {
+                if (sourceFile.symbol) {
+                    return getMergedSymbol(sourceFile.symbol);
+                }
+                if (moduleNotFoundError) {
+                    error(moduleReferenceLiteral, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
+                }
+                return undefined;
+            }
+            if (patternAmbientModules) {
+                var pattern = ts.findBestPatternMatch(patternAmbientModules, function (_) { return _.pattern; }, moduleName);
+                if (pattern) {
+                    return getMergedSymbol(pattern.symbol);
+                }
+            }
+            if (moduleNotFoundError) {
+                error(moduleReferenceLiteral, moduleNotFoundError, moduleName);
+            }
+            return undefined;
+        }
+        function resolveExternalModuleSymbol(moduleSymbol) {
+            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports["export="])) || moduleSymbol;
+        }
+        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression) {
+            var symbol = resolveExternalModuleSymbol(moduleSymbol);
+            if (symbol && !(symbol.flags & (1536 | 3))) {
+                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
+                symbol = undefined;
+            }
+            return symbol;
+        }
+        function hasExportAssignmentSymbol(moduleSymbol) {
+            return moduleSymbol.exports["export="] !== undefined;
+        }
+        function getExportsOfModuleAsArray(moduleSymbol) {
+            return symbolsToArray(getExportsOfModule(moduleSymbol));
+        }
+        function getExportsOfSymbol(symbol) {
+            return symbol.flags & 1536 ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
+        }
+        function getExportsOfModule(moduleSymbol) {
+            var links = getSymbolLinks(moduleSymbol);
+            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
+        }
+        function extendExportSymbols(target, source, lookupTable, exportNode) {
+            for (var id in source) {
+                if (id !== "default" && !ts.hasProperty(target, id)) {
+                    target[id] = source[id];
+                    if (lookupTable && exportNode) {
+                        lookupTable[id] = {
+                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
+                        };
+                    }
+                }
+                else if (lookupTable && exportNode && id !== "default" && ts.hasProperty(target, id) && resolveSymbol(target[id]) !== resolveSymbol(source[id])) {
+                    if (!lookupTable[id].exportsWithDuplicate) {
+                        lookupTable[id].exportsWithDuplicate = [exportNode];
+                    }
+                    else {
+                        lookupTable[id].exportsWithDuplicate.push(exportNode);
+                    }
+                }
+            }
+        }
+        function getExportsForModule(moduleSymbol) {
+            var visitedSymbols = [];
+            return visit(moduleSymbol) || moduleSymbol.exports;
+            function visit(symbol) {
+                if (!(symbol && symbol.flags & 1952 && !ts.contains(visitedSymbols, symbol))) {
+                    return;
+                }
+                visitedSymbols.push(symbol);
+                var symbols = cloneSymbolTable(symbol.exports);
+                var exportStars = symbol.exports["__export"];
+                if (exportStars) {
+                    var nestedSymbols = {};
+                    var lookupTable = {};
+                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
+                        var node = _a[_i];
+                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
+                        var exportedSymbols = visit(resolvedModule);
+                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable, node);
+                    }
+                    for (var id in lookupTable) {
+                        var exportsWithDuplicate = lookupTable[id].exportsWithDuplicate;
+                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || ts.hasProperty(symbols, id)) {
+                            continue;
+                        }
+                        for (var _b = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _b < exportsWithDuplicate_1.length; _b++) {
+                            var node = exportsWithDuplicate_1[_b];
+                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable[id].specifierText, id));
+                        }
+                    }
+                    extendExportSymbols(symbols, nestedSymbols);
+                }
+                return symbols;
+            }
+        }
+        function getMergedSymbol(symbol) {
+            var merged;
+            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
+        }
+        function getSymbolOfNode(node) {
+            return getMergedSymbol(node.symbol);
+        }
+        function getParentOfSymbol(symbol) {
+            return getMergedSymbol(symbol.parent);
+        }
+        function getExportSymbolOfValueSymbolIfExported(symbol) {
+            return symbol && (symbol.flags & 1048576) !== 0
+                ? getMergedSymbol(symbol.exportSymbol)
+                : symbol;
+        }
+        function symbolIsValue(symbol) {
+            if (symbol.flags & 16777216) {
+                return symbolIsValue(getSymbolLinks(symbol).target);
+            }
+            if (symbol.flags & 107455) {
+                return true;
+            }
+            if (symbol.flags & 8388608) {
+                return (resolveAlias(symbol).flags & 107455) !== 0;
+            }
+            return false;
+        }
+        function findConstructorDeclaration(node) {
+            var members = node.members;
+            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
+                var member = members_1[_i];
+                if (member.kind === 148 && ts.nodeIsPresent(member.body)) {
+                    return member;
+                }
+            }
+        }
+        function createType(flags) {
+            var result = new Type(checker, flags);
+            result.id = typeCount;
+            typeCount++;
+            return result;
+        }
+        function createIntrinsicType(kind, intrinsicName) {
+            var type = createType(kind);
+            type.intrinsicName = intrinsicName;
+            return type;
+        }
+        function createObjectType(kind, symbol) {
+            var type = createType(kind);
+            type.symbol = symbol;
+            return type;
+        }
+        function isReservedMemberName(name) {
+            return name.charCodeAt(0) === 95 &&
+                name.charCodeAt(1) === 95 &&
+                name.charCodeAt(2) !== 95 &&
+                name.charCodeAt(2) !== 64;
+        }
+        function getNamedMembers(members) {
+            var result;
+            for (var id in members) {
+                if (ts.hasProperty(members, id)) {
+                    if (!isReservedMemberName(id)) {
+                        if (!result)
+                            result = [];
+                        var symbol = members[id];
+                        if (symbolIsValue(symbol)) {
+                            result.push(symbol);
+                        }
+                    }
+                }
+            }
+            return result || emptyArray;
+        }
+        function setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            type.members = members;
+            type.properties = getNamedMembers(members);
+            type.callSignatures = callSignatures;
+            type.constructSignatures = constructSignatures;
+            if (stringIndexInfo)
+                type.stringIndexInfo = stringIndexInfo;
+            if (numberIndexInfo)
+                type.numberIndexInfo = numberIndexInfo;
+            return type;
+        }
+        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            return setObjectTypeMembers(createObjectType(65536, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
+            var result;
+            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
+                if (location_1.locals && !isGlobalSourceFile(location_1)) {
+                    if (result = callback(location_1.locals)) {
+                        return result;
+                    }
+                }
+                switch (location_1.kind) {
+                    case 256:
+                        if (!ts.isExternalOrCommonJsModule(location_1)) {
+                            break;
+                        }
+                    case 225:
+                        if (result = callback(getSymbolOfNode(location_1).exports)) {
+                            return result;
+                        }
+                        break;
+                }
+            }
+            return callback(globals);
+        }
+        function getQualifiedLeftMeaning(rightMeaning) {
+            return rightMeaning === 107455 ? 107455 : 1536;
+        }
+        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
+            function getAccessibleSymbolChainFromSymbolTable(symbols) {
+                function canQualifySymbol(symbolFromSymbolTable, meaning) {
+                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
+                        return true;
+                    }
+                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
+                    return !!accessibleParent;
+                }
+                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
+                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
+                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
+                            canQualifySymbol(symbolFromSymbolTable, meaning);
+                    }
+                }
+                if (isAccessible(ts.lookUp(symbols, symbol.name))) {
+                    return [symbol];
+                }
+                return ts.forEachValue(symbols, function (symbolFromSymbolTable) {
+                    if (symbolFromSymbolTable.flags & 8388608
+                        && symbolFromSymbolTable.name !== "export="
+                        && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238)) {
+                        if (!useOnlyExternalAliasing ||
+                            ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
+                            var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
+                            if (isAccessible(symbolFromSymbolTable, resolveAlias(symbolFromSymbolTable))) {
+                                return [symbolFromSymbolTable];
+                            }
+                            var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTable(resolvedImportedSymbol.exports) : undefined;
+                            if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
+                                return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
+                            }
+                        }
+                    }
+                });
+            }
+            if (symbol) {
+                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
+                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
+                }
+            }
+        }
+        function needsQualification(symbol, enclosingDeclaration, meaning) {
+            var qualify = false;
+            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
+                if (!ts.hasProperty(symbolTable, symbol.name)) {
+                    return false;
+                }
+                var symbolFromSymbolTable = symbolTable[symbol.name];
+                if (symbolFromSymbolTable === symbol) {
+                    return true;
+                }
+                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
+                if (symbolFromSymbolTable.flags & meaning) {
+                    qualify = true;
+                    return true;
+                }
+                return false;
+            });
+            return qualify;
+        }
+        function isPropertyOrMethodDeclarationSymbol(symbol) {
+            if (symbol.declarations && symbol.declarations.length) {
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    switch (declaration.kind) {
+                        case 145:
+                        case 147:
+                        case 149:
+                        case 150:
+                            continue;
+                        default:
+                            return false;
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function isSymbolAccessible(symbol, enclosingDeclaration, meaning) {
+            if (symbol && enclosingDeclaration && !(symbol.flags & 262144)) {
+                var initialSymbol = symbol;
+                var meaningToLook = meaning;
+                while (symbol) {
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, false);
+                    if (accessibleSymbolChain) {
+                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0]);
+                        if (!hasAccessibleDeclarations) {
+                            return {
+                                accessibility: 1,
+                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1536) : undefined
+                            };
+                        }
+                        return hasAccessibleDeclarations;
+                    }
+                    meaningToLook = getQualifiedLeftMeaning(meaning);
+                    symbol = getParentOfSymbol(symbol);
+                }
+                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
+                if (symbolExternalModule) {
+                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
+                    if (symbolExternalModule !== enclosingExternalModule) {
+                        return {
+                            accessibility: 2,
+                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                            errorModuleName: symbolToString(symbolExternalModule)
+                        };
+                    }
+                }
+                return {
+                    accessibility: 1,
+                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning)
+                };
+            }
+            return { accessibility: 0 };
+            function getExternalModuleContainer(declaration) {
+                for (; declaration; declaration = declaration.parent) {
+                    if (hasExternalModuleSymbol(declaration)) {
+                        return getSymbolOfNode(declaration);
+                    }
+                }
+            }
+        }
+        function hasExternalModuleSymbol(declaration) {
+            return ts.isAmbientModule(declaration) || (declaration.kind === 256 && ts.isExternalOrCommonJsModule(declaration));
+        }
+        function hasVisibleDeclarations(symbol) {
+            var aliasesToMakeVisible;
+            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
+                return undefined;
+            }
+            return { accessibility: 0, aliasesToMakeVisible: aliasesToMakeVisible };
+            function getIsDeclarationVisible(declaration) {
+                if (!isDeclarationVisible(declaration)) {
+                    var anyImportSyntax = getAnyImportSyntax(declaration);
+                    if (anyImportSyntax &&
+                        !(anyImportSyntax.flags & 1) &&
+                        isDeclarationVisible(anyImportSyntax.parent)) {
+                        getNodeLinks(declaration).isVisible = true;
+                        if (aliasesToMakeVisible) {
+                            if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
+                                aliasesToMakeVisible.push(anyImportSyntax);
+                            }
+                        }
+                        else {
+                            aliasesToMakeVisible = [anyImportSyntax];
+                        }
+                        return true;
+                    }
+                    return false;
+                }
+                return true;
+            }
+        }
+        function isEntityNameVisible(entityName, enclosingDeclaration) {
+            var meaning;
+            if (entityName.parent.kind === 158 || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                meaning = 107455 | 1048576;
+            }
+            else if (entityName.kind === 139 || entityName.kind === 172 ||
+                entityName.parent.kind === 229) {
+                meaning = 1536;
+            }
+            else {
+                meaning = 793056;
+            }
+            var firstIdentifier = getFirstIdentifier(entityName);
+            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, undefined, undefined);
+            return (symbol && hasVisibleDeclarations(symbol)) || {
+                accessibility: 1,
+                errorSymbolName: ts.getTextOfNode(firstIdentifier),
+                errorNode: firstIdentifier
+            };
+        }
+        function writeKeyword(writer, kind) {
+            writer.writeKeyword(ts.tokenToString(kind));
+        }
+        function writePunctuation(writer, kind) {
+            writer.writePunctuation(ts.tokenToString(kind));
+        }
+        function writeSpace(writer) {
+            writer.writeSpace(" ");
+        }
+        function symbolToString(symbol, enclosingDeclaration, meaning) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function signatureToString(signature, enclosingDeclaration, flags, kind) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function typeToString(type, enclosingDeclaration, flags) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            var maxLength = compilerOptions.noErrorTruncation || flags & 4 ? undefined : 100;
+            if (maxLength && result.length >= maxLength) {
+                result = result.substr(0, maxLength - "...".length) + "...";
+            }
+            return result;
+        }
+        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function visibilityToString(flags) {
+            if (flags === 8) {
+                return "private";
+            }
+            if (flags === 16) {
+                return "protected";
+            }
+            return "public";
+        }
+        function getTypeAliasForTypeLiteral(type) {
+            if (type.symbol && type.symbol.flags & 2048) {
+                var node = type.symbol.declarations[0].parent;
+                while (node.kind === 164) {
+                    node = node.parent;
+                }
+                if (node.kind === 223) {
+                    return getSymbolOfNode(node);
+                }
+            }
+            return undefined;
+        }
+        function isTopLevelInExternalModuleAugmentation(node) {
+            return node && node.parent &&
+                node.parent.kind === 226 &&
+                ts.isExternalModuleAugmentation(node.parent.parent);
+        }
+        function getSymbolDisplayBuilder() {
+            function getNameOfSymbol(symbol) {
+                if (symbol.declarations && symbol.declarations.length) {
+                    var declaration = symbol.declarations[0];
+                    if (declaration.name) {
+                        return ts.declarationNameToString(declaration.name);
+                    }
+                    switch (declaration.kind) {
+                        case 192:
+                            return "(Anonymous class)";
+                        case 179:
+                        case 180:
+                            return "(Anonymous function)";
+                    }
+                }
+                return symbol.name;
+            }
+            function appendSymbolNameOnly(symbol, writer) {
+                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
+            }
+            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
+                var symbolName = getNameOfSymbol(symbol);
+                var firstChar = symbolName.charCodeAt(0);
+                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
+                if (needsElementAccess) {
+                    writePunctuation(writer, 19);
+                    if (ts.isSingleOrDoubleQuote(firstChar)) {
+                        writer.writeStringLiteral(symbolName);
+                    }
+                    else {
+                        writer.writeSymbol(symbolName, symbol);
+                    }
+                    writePunctuation(writer, 20);
+                }
+                else {
+                    writePunctuation(writer, 21);
+                    writer.writeSymbol(symbolName, symbol);
+                }
+            }
+            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
+                var parentSymbol;
+                function appendParentTypeArgumentsAndSymbolName(symbol) {
+                    if (parentSymbol) {
+                        if (flags & 1) {
+                            if (symbol.flags & 16777216) {
+                                buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration);
+                            }
+                            else {
+                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
+                            }
+                        }
+                        appendPropertyOrElementAccessForSymbol(symbol, writer);
+                    }
+                    else {
+                        appendSymbolNameOnly(symbol, writer);
+                    }
+                    parentSymbol = symbol;
+                }
+                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
+                function walkSymbol(symbol, meaning) {
+                    if (symbol) {
+                        var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2));
+                        if (!accessibleSymbolChain ||
+                            needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
+                            walkSymbol(getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol), getQualifiedLeftMeaning(meaning));
+                        }
+                        if (accessibleSymbolChain) {
+                            for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
+                                var accessibleSymbol = accessibleSymbolChain_1[_i];
+                                appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
+                            }
+                        }
+                        else {
+                            if (!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) {
+                                return;
+                            }
+                            if (symbol.flags & 2048 || symbol.flags & 4096) {
+                                return;
+                            }
+                            appendParentTypeArgumentsAndSymbolName(symbol);
+                        }
+                    }
+                }
+                var isTypeParameter = symbol.flags & 262144;
+                var typeFormatFlag = 128 & typeFlags;
+                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
+                    walkSymbol(symbol, meaning);
+                    return;
+                }
+                return appendParentTypeArgumentsAndSymbolName(symbol);
+            }
+            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
+                var globalFlagsToPass = globalFlags & 16;
+                var inObjectTypeLiteral = false;
+                return writeType(type, globalFlags);
+                function writeType(type, flags) {
+                    if (type.flags & 150995071) {
+                        writer.writeKeyword(!(globalFlags & 16) && isTypeAny(type)
+                            ? "any"
+                            : type.intrinsicName);
+                    }
+                    else if (type.flags & 33554432) {
+                        if (inObjectTypeLiteral) {
+                            writer.reportInaccessibleThisError();
+                        }
+                        writer.writeKeyword("this");
+                    }
+                    else if (type.flags & 4096) {
+                        writeTypeReference(type, flags);
+                    }
+                    else if (type.flags & (1024 | 2048 | 128 | 512)) {
+                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793056, 0, flags);
+                    }
+                    else if (type.flags & 8192) {
+                        writeTupleType(type);
+                    }
+                    else if (type.flags & 49152) {
+                        writeUnionOrIntersectionType(type, flags);
+                    }
+                    else if (type.flags & 65536) {
+                        writeAnonymousType(type, flags);
+                    }
+                    else if (type.flags & 256) {
+                        writer.writeStringLiteral("\"" + ts.escapeString(type.text) + "\"");
+                    }
+                    else {
+                        writePunctuation(writer, 15);
+                        writeSpace(writer);
+                        writePunctuation(writer, 22);
+                        writeSpace(writer);
+                        writePunctuation(writer, 16);
+                    }
+                }
+                function writeTypeList(types, delimiter) {
+                    for (var i = 0; i < types.length; i++) {
+                        if (i > 0) {
+                            if (delimiter !== 24) {
+                                writeSpace(writer);
+                            }
+                            writePunctuation(writer, delimiter);
+                            writeSpace(writer);
+                        }
+                        writeType(types[i], delimiter === 24 ? 0 : 64);
+                    }
+                }
+                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
+                    if (symbol.flags & 32 || !isReservedMemberName(symbol.name)) {
+                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793056, 0, flags);
+                    }
+                    if (pos < end) {
+                        writePunctuation(writer, 25);
+                        writeType(typeArguments[pos], 256);
+                        pos++;
+                        while (pos < end) {
+                            writePunctuation(writer, 24);
+                            writeSpace(writer);
+                            writeType(typeArguments[pos], 0);
+                            pos++;
+                        }
+                        writePunctuation(writer, 27);
+                    }
+                }
+                function writeTypeReference(type, flags) {
+                    var typeArguments = type.typeArguments || emptyArray;
+                    if (type.target === globalArrayType && !(flags & 1)) {
+                        writeType(typeArguments[0], 64);
+                        writePunctuation(writer, 19);
+                        writePunctuation(writer, 20);
+                    }
+                    else {
+                        var outerTypeParameters = type.target.outerTypeParameters;
+                        var i = 0;
+                        if (outerTypeParameters) {
+                            var length_1 = outerTypeParameters.length;
+                            while (i < length_1) {
+                                var start = i;
+                                var parent_7 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
+                                do {
+                                    i++;
+                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_7);
+                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
+                                    writeSymbolTypeReference(parent_7, typeArguments, start, i, flags);
+                                    writePunctuation(writer, 21);
+                                }
+                            }
+                        }
+                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
+                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
+                    }
+                }
+                function writeTupleType(type) {
+                    writePunctuation(writer, 19);
+                    writeTypeList(type.elementTypes, 24);
+                    writePunctuation(writer, 20);
+                }
+                function writeUnionOrIntersectionType(type, flags) {
+                    if (flags & 64) {
+                        writePunctuation(writer, 17);
+                    }
+                    writeTypeList(type.types, type.flags & 16384 ? 47 : 46);
+                    if (flags & 64) {
+                        writePunctuation(writer, 18);
+                    }
+                }
+                function writeAnonymousType(type, flags) {
+                    var symbol = type.symbol;
+                    if (symbol) {
+                        if (symbol.flags & (32 | 384 | 512)) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (shouldWriteTypeOfFunctionSymbol()) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (ts.contains(symbolStack, symbol)) {
+                            var typeAlias = getTypeAliasForTypeLiteral(type);
+                            if (typeAlias) {
+                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793056, 0, flags);
+                            }
+                            else {
+                                writeKeyword(writer, 117);
+                            }
+                        }
+                        else {
+                            if (!symbolStack) {
+                                symbolStack = [];
+                            }
+                            symbolStack.push(symbol);
+                            writeLiteralType(type, flags);
+                            symbolStack.pop();
+                        }
+                    }
+                    else {
+                        writeLiteralType(type, flags);
+                    }
+                    function shouldWriteTypeOfFunctionSymbol() {
+                        var isStaticMethodSymbol = !!(symbol.flags & 8192 &&
+                            ts.forEach(symbol.declarations, function (declaration) { return declaration.flags & 32; }));
+                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16) &&
+                            (symbol.parent ||
+                                ts.forEach(symbol.declarations, function (declaration) {
+                                    return declaration.parent.kind === 256 || declaration.parent.kind === 226;
+                                }));
+                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
+                            return !!(flags & 2) ||
+                                (ts.contains(symbolStack, symbol));
+                        }
+                    }
+                }
+                function writeTypeOfSymbol(type, typeFormatFlags) {
+                    writeKeyword(writer, 101);
+                    writeSpace(writer);
+                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455, 0, typeFormatFlags);
+                }
+                function writeIndexSignature(info, keyword) {
+                    if (info) {
+                        if (info.isReadonly) {
+                            writeKeyword(writer, 128);
+                            writeSpace(writer);
+                        }
+                        writePunctuation(writer, 19);
+                        writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
+                        writePunctuation(writer, 54);
+                        writeSpace(writer);
+                        writeKeyword(writer, keyword);
+                        writePunctuation(writer, 20);
+                        writePunctuation(writer, 54);
+                        writeSpace(writer);
+                        writeType(info.type, 0);
+                        writePunctuation(writer, 23);
+                        writer.writeLine();
+                    }
+                }
+                function writePropertyWithModifiers(prop) {
+                    if (isReadonlySymbol(prop)) {
+                        writeKeyword(writer, 128);
+                        writeSpace(writer);
+                    }
+                    buildSymbolDisplay(prop, writer);
+                    if (prop.flags & 536870912) {
+                        writePunctuation(writer, 53);
+                    }
+                }
+                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
+                    if (flags & 64) {
+                        return true;
+                    }
+                    else if (flags & 256) {
+                        var typeParameters = callSignature.target && (flags & 32) ?
+                            callSignature.target.typeParameters : callSignature.typeParameters;
+                        return typeParameters && typeParameters.length !== 0;
+                    }
+                    return false;
+                }
+                function writeLiteralType(type, flags) {
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
+                            writePunctuation(writer, 15);
+                            writePunctuation(writer, 16);
+                            return;
+                        }
+                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
+                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 17);
+                            }
+                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8, undefined, symbolStack);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 18);
+                            }
+                            return;
+                        }
+                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
+                            if (flags & 64) {
+                                writePunctuation(writer, 17);
+                            }
+                            writeKeyword(writer, 92);
+                            writeSpace(writer);
+                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8, undefined, symbolStack);
+                            if (flags & 64) {
+                                writePunctuation(writer, 18);
+                            }
+                            return;
+                        }
+                    }
+                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
+                    inObjectTypeLiteral = true;
+                    writePunctuation(writer, 15);
+                    writer.writeLine();
+                    writer.increaseIndent();
+                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
+                        var signature = _a[_i];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, undefined, symbolStack);
+                        writePunctuation(writer, 23);
+                        writer.writeLine();
+                    }
+                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
+                        var signature = _c[_b];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1, symbolStack);
+                        writePunctuation(writer, 23);
+                        writer.writeLine();
+                    }
+                    writeIndexSignature(resolved.stringIndexInfo, 132);
+                    writeIndexSignature(resolved.numberIndexInfo, 130);
+                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
+                        var p = _e[_d];
+                        var t = getTypeOfSymbol(p);
+                        if (p.flags & (16 | 8192) && !getPropertiesOfObjectType(t).length) {
+                            var signatures = getSignaturesOfType(t, 0);
+                            for (var _f = 0, signatures_1 = signatures; _f < signatures_1.length; _f++) {
+                                var signature = signatures_1[_f];
+                                writePropertyWithModifiers(p);
+                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, undefined, symbolStack);
+                                writePunctuation(writer, 23);
+                                writer.writeLine();
+                            }
+                        }
+                        else {
+                            writePropertyWithModifiers(p);
+                            writePunctuation(writer, 54);
+                            writeSpace(writer);
+                            writeType(t, 0);
+                            writePunctuation(writer, 23);
+                            writer.writeLine();
+                        }
+                    }
+                    writer.decreaseIndent();
+                    writePunctuation(writer, 16);
+                    inObjectTypeLiteral = saveInObjectTypeLiteral;
+                }
+            }
+            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
+                var targetSymbol = getTargetSymbol(symbol);
+                if (targetSymbol.flags & 32 || targetSymbol.flags & 64 || targetSymbol.flags & 524288) {
+                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
+                }
+            }
+            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
+                appendSymbolNameOnly(tp.symbol, writer);
+                var constraint = getConstraintOfTypeParameter(tp);
+                if (constraint) {
+                    writeSpace(writer);
+                    writeKeyword(writer, 83);
+                    writeSpace(writer);
+                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
+                }
+            }
+            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
+                var parameterNode = p.valueDeclaration;
+                if (ts.isRestParameter(parameterNode)) {
+                    writePunctuation(writer, 22);
+                }
+                if (ts.isBindingPattern(parameterNode.name)) {
+                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    appendSymbolNameOnly(p, writer);
+                }
+                if (isOptionalParameter(parameterNode)) {
+                    writePunctuation(writer, 53);
+                }
+                writePunctuation(writer, 54);
+                writeSpace(writer);
+                buildTypeDisplay(getTypeOfSymbol(p), writer, enclosingDeclaration, flags, symbolStack);
+            }
+            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
+                if (bindingPattern.kind === 167) {
+                    writePunctuation(writer, 15);
+                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 16);
+                }
+                else if (bindingPattern.kind === 168) {
+                    writePunctuation(writer, 19);
+                    var elements = bindingPattern.elements;
+                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    if (elements && elements.hasTrailingComma) {
+                        writePunctuation(writer, 24);
+                    }
+                    writePunctuation(writer, 20);
+                }
+            }
+            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
+                if (bindingElement.kind === 193) {
+                    return;
+                }
+                ts.Debug.assert(bindingElement.kind === 169);
+                if (bindingElement.propertyName) {
+                    writer.writeSymbol(ts.getTextOfNode(bindingElement.propertyName), bindingElement.symbol);
+                    writePunctuation(writer, 54);
+                    writeSpace(writer);
+                }
+                if (ts.isBindingPattern(bindingElement.name)) {
+                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    if (bindingElement.dotDotDotToken) {
+                        writePunctuation(writer, 22);
+                    }
+                    appendSymbolNameOnly(bindingElement.symbol, writer);
+                }
+            }
+            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 25);
+                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 27);
+                }
+            }
+            function buildDisplayForCommaSeparatedList(list, writer, action) {
+                for (var i = 0; i < list.length; i++) {
+                    if (i > 0) {
+                        writePunctuation(writer, 24);
+                        writeSpace(writer);
+                    }
+                    action(list[i]);
+                }
+            }
+            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration, flags, symbolStack) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 25);
+                    var flags_1 = 256;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (i > 0) {
+                            writePunctuation(writer, 24);
+                            writeSpace(writer);
+                            flags_1 = 0;
+                        }
+                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags_1);
+                    }
+                    writePunctuation(writer, 27);
+                }
+            }
+            function buildDisplayForParametersAndDelimiters(thisType, parameters, writer, enclosingDeclaration, flags, symbolStack) {
+                writePunctuation(writer, 17);
+                if (thisType) {
+                    writeKeyword(writer, 97);
+                    writePunctuation(writer, 54);
+                    writeSpace(writer);
+                    buildTypeDisplay(thisType, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                for (var i = 0; i < parameters.length; i++) {
+                    if (i > 0 || thisType) {
+                        writePunctuation(writer, 24);
+                        writeSpace(writer);
+                    }
+                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
+                }
+                writePunctuation(writer, 18);
+            }
+            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    writer.writeParameter(predicate.parameterName);
+                }
+                else {
+                    writeKeyword(writer, 97);
+                }
+                writeSpace(writer);
+                writeKeyword(writer, 124);
+                writeSpace(writer);
+                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
+            }
+            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
+                if (flags & 8) {
+                    writeSpace(writer);
+                    writePunctuation(writer, 34);
+                }
+                else {
+                    writePunctuation(writer, 54);
+                }
+                writeSpace(writer);
+                if (signature.typePredicate) {
+                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    var returnType = getReturnTypeOfSignature(signature);
+                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
+                }
+            }
+            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
+                if (kind === 1) {
+                    writeKeyword(writer, 92);
+                    writeSpace(writer);
+                }
+                if (signature.target && (flags & 32)) {
+                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
+                }
+                else {
+                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                buildDisplayForParametersAndDelimiters(signature.thisType, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
+                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
+            }
+            return _displayBuilder || (_displayBuilder = {
+                buildSymbolDisplay: buildSymbolDisplay,
+                buildTypeDisplay: buildTypeDisplay,
+                buildTypeParameterDisplay: buildTypeParameterDisplay,
+                buildTypePredicateDisplay: buildTypePredicateDisplay,
+                buildParameterDisplay: buildParameterDisplay,
+                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
+                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
+                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
+                buildSignatureDisplay: buildSignatureDisplay,
+                buildReturnTypeDisplay: buildReturnTypeDisplay
+            });
+        }
+        function isDeclarationVisible(node) {
+            if (node) {
+                var links = getNodeLinks(node);
+                if (links.isVisible === undefined) {
+                    links.isVisible = !!determineIfDeclarationIsVisible();
+                }
+                return links.isVisible;
+            }
+            return false;
+            function determineIfDeclarationIsVisible() {
+                switch (node.kind) {
+                    case 169:
+                        return isDeclarationVisible(node.parent.parent);
+                    case 218:
+                        if (ts.isBindingPattern(node.name) &&
+                            !node.name.elements.length) {
+                            return false;
+                        }
+                    case 225:
+                    case 221:
+                    case 222:
+                    case 223:
+                    case 220:
+                    case 224:
+                    case 229:
+                        if (ts.isExternalModuleAugmentation(node)) {
+                            return true;
+                        }
+                        var parent_8 = getDeclarationContainer(node);
+                        if (!(ts.getCombinedNodeFlags(node) & 1) &&
+                            !(node.kind !== 229 && parent_8.kind !== 256 && ts.isInAmbientContext(parent_8))) {
+                            return isGlobalSourceFile(parent_8);
+                        }
+                        return isDeclarationVisible(parent_8);
+                    case 145:
+                    case 144:
+                    case 149:
+                    case 150:
+                    case 147:
+                    case 146:
+                        if (node.flags & (8 | 16)) {
+                            return false;
+                        }
+                    case 148:
+                    case 152:
+                    case 151:
+                    case 153:
+                    case 142:
+                    case 226:
+                    case 156:
+                    case 157:
+                    case 159:
+                    case 155:
+                    case 160:
+                    case 161:
+                    case 162:
+                    case 163:
+                    case 164:
+                        return isDeclarationVisible(node.parent);
+                    case 231:
+                    case 232:
+                    case 234:
+                        return false;
+                    case 141:
+                    case 256:
+                        return true;
+                    case 235:
+                        return false;
+                    default:
+                        return false;
+                }
+            }
+        }
+        function collectLinkedAliases(node) {
+            var exportSymbol;
+            if (node.parent && node.parent.kind === 235) {
+                exportSymbol = resolveName(node.parent, node.text, 107455 | 793056 | 1536 | 8388608, ts.Diagnostics.Cannot_find_name_0, node);
+            }
+            else if (node.parent.kind === 238) {
+                var exportSpecifier = node.parent;
+                exportSymbol = exportSpecifier.parent.parent.moduleSpecifier ?
+                    getExternalModuleMember(exportSpecifier.parent.parent, exportSpecifier) :
+                    resolveEntityName(exportSpecifier.propertyName || exportSpecifier.name, 107455 | 793056 | 1536 | 8388608);
+            }
+            var result = [];
+            if (exportSymbol) {
+                buildVisibleNodeList(exportSymbol.declarations);
+            }
+            return result;
+            function buildVisibleNodeList(declarations) {
+                ts.forEach(declarations, function (declaration) {
+                    getNodeLinks(declaration).isVisible = true;
+                    var resultNode = getAnyImportSyntax(declaration) || declaration;
+                    if (!ts.contains(result, resultNode)) {
+                        result.push(resultNode);
+                    }
+                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
+                        var internalModuleReference = declaration.moduleReference;
+                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
+                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 | 793056 | 1536, undefined, undefined);
+                        if (importSymbol) {
+                            buildVisibleNodeList(importSymbol.declarations);
+                        }
+                    }
+                });
+            }
+        }
+        function pushTypeResolution(target, propertyName) {
+            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
+            if (resolutionCycleStartIndex >= 0) {
+                var length_2 = resolutionTargets.length;
+                for (var i = resolutionCycleStartIndex; i < length_2; i++) {
+                    resolutionResults[i] = false;
+                }
+                return false;
+            }
+            resolutionTargets.push(target);
+            resolutionResults.push(true);
+            resolutionPropertyNames.push(propertyName);
+            return true;
+        }
+        function findResolutionCycleStartIndex(target, propertyName) {
+            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
+                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
+                    return -1;
+                }
+                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+        function hasType(target, propertyName) {
+            if (propertyName === 0) {
+                return getSymbolLinks(target).type;
+            }
+            if (propertyName === 2) {
+                return getSymbolLinks(target).declaredType;
+            }
+            if (propertyName === 1) {
+                ts.Debug.assert(!!(target.flags & 1024));
+                return target.resolvedBaseConstructorType;
+            }
+            if (propertyName === 3) {
+                return target.resolvedReturnType;
+            }
+            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
+        }
+        function popTypeResolution() {
+            resolutionTargets.pop();
+            resolutionPropertyNames.pop();
+            return resolutionResults.pop();
+        }
+        function getDeclarationContainer(node) {
+            node = ts.getRootDeclaration(node);
+            while (node) {
+                switch (node.kind) {
+                    case 218:
+                    case 219:
+                    case 234:
+                    case 233:
+                    case 232:
+                    case 231:
+                        node = node.parent;
+                        break;
+                    default:
+                        return node.parent;
+                }
+            }
+        }
+        function getTypeOfPrototypeProperty(prototype) {
+            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
+            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
+        }
+        function getTypeOfPropertyOfType(type, name) {
+            var prop = getPropertyOfType(type, name);
+            return prop ? getTypeOfSymbol(prop) : undefined;
+        }
+        function isTypeAny(type) {
+            return type && (type.flags & 1) !== 0;
+        }
+        function getTypeForBindingElementParent(node) {
+            var symbol = getSymbolOfNode(node);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, false);
+        }
+        function getTextOfPropertyName(name) {
+            switch (name.kind) {
+                case 69:
+                    return name.text;
+                case 9:
+                case 8:
+                    return name.text;
+                case 140:
+                    if (ts.isStringOrNumericLiteral(name.expression.kind)) {
+                        return name.expression.text;
+                    }
+            }
+            return undefined;
+        }
+        function isComputedNonLiteralName(name) {
+            return name.kind === 140 && !ts.isStringOrNumericLiteral(name.expression.kind);
+        }
+        function getTypeForBindingElement(declaration) {
+            var pattern = declaration.parent;
+            var parentType = getTypeForBindingElementParent(pattern.parent);
+            if (parentType === unknownType) {
+                return unknownType;
+            }
+            if (!parentType || isTypeAny(parentType)) {
+                if (declaration.initializer) {
+                    return checkExpressionCached(declaration.initializer);
+                }
+                return parentType;
+            }
+            var type;
+            if (pattern.kind === 167) {
+                var name_11 = declaration.propertyName || declaration.name;
+                if (isComputedNonLiteralName(name_11)) {
+                    return anyType;
+                }
+                if (declaration.initializer) {
+                    getContextualType(declaration.initializer);
+                }
+                var text = getTextOfPropertyName(name_11);
+                type = getTypeOfPropertyOfType(parentType, text) ||
+                    isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1) ||
+                    getIndexTypeOfType(parentType, 0);
+                if (!type) {
+                    error(name_11, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_11));
+                    return unknownType;
+                }
+            }
+            else {
+                var elementType = checkIteratedTypeOrElementType(parentType, pattern, false);
+                if (!declaration.dotDotDotToken) {
+                    var propName = "" + ts.indexOf(pattern.elements, declaration);
+                    type = isTupleLikeType(parentType)
+                        ? getTypeOfPropertyOfType(parentType, propName)
+                        : elementType;
+                    if (!type) {
+                        if (isTupleType(parentType)) {
+                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), parentType.elementTypes.length, pattern.elements.length);
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
+                        }
+                        return unknownType;
+                    }
+                }
+                else {
+                    type = createArrayType(elementType);
+                }
+            }
+            if (strictNullChecks && declaration.initializer && !(getCombinedTypeFlags(checkExpressionCached(declaration.initializer)) & 32)) {
+                type = getTypeWithFacts(type, 131072);
+            }
+            return type;
+        }
+        function getTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
+            var jsDocType = getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration);
+            if (jsDocType) {
+                return getTypeFromTypeNode(jsDocType);
+            }
+        }
+        function getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
+            var typeTag = ts.getJSDocTypeTag(declaration);
+            if (typeTag && typeTag.typeExpression) {
+                return typeTag.typeExpression.type;
+            }
+            if (declaration.kind === 218 &&
+                declaration.parent.kind === 219 &&
+                declaration.parent.parent.kind === 200) {
+                var annotation = ts.getJSDocTypeTag(declaration.parent.parent);
+                if (annotation && annotation.typeExpression) {
+                    return annotation.typeExpression.type;
+                }
+            }
+            else if (declaration.kind === 142) {
+                var paramTag = ts.getCorrespondingJSDocParameterTag(declaration);
+                if (paramTag && paramTag.typeExpression) {
+                    return paramTag.typeExpression.type;
+                }
+            }
+            return undefined;
+        }
+        function addOptionality(type, optional) {
+            return strictNullChecks && optional ? addTypeKind(type, 32) : type;
+        }
+        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
+            if (declaration.flags & 134217728) {
+                var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            if (declaration.parent.parent.kind === 207) {
+                return stringType;
+            }
+            if (declaration.parent.parent.kind === 208) {
+                return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType;
+            }
+            if (ts.isBindingPattern(declaration.parent)) {
+                return getTypeForBindingElement(declaration);
+            }
+            if (declaration.type) {
+                return addOptionality(getTypeFromTypeNode(declaration.type), declaration.questionToken && includeOptionality);
+            }
+            if (declaration.kind === 142) {
+                var func = declaration.parent;
+                if (func.kind === 150 && !ts.hasDynamicName(func)) {
+                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149);
+                    if (getter) {
+                        var signature = getSignatureFromDeclaration(getter);
+                        var thisParameter = getAccessorThisParameter(func);
+                        if (thisParameter && declaration === thisParameter) {
+                            return signature.thisType;
+                        }
+                        return getReturnTypeOfSignature(signature);
+                    }
+                }
+                var type = declaration.symbol.name === "this"
+                    ? getContextuallyTypedThisType(func)
+                    : getContextuallyTypedParameterType(declaration);
+                if (type) {
+                    return addOptionality(type, declaration.questionToken && includeOptionality);
+                }
+            }
+            if (declaration.initializer) {
+                return addOptionality(checkExpressionCached(declaration.initializer), declaration.questionToken && includeOptionality);
+            }
+            if (declaration.kind === 254) {
+                return checkIdentifier(declaration.name);
+            }
+            if (ts.isBindingPattern(declaration.name)) {
+                return getTypeFromBindingPattern(declaration.name, false);
+            }
+            return undefined;
+        }
+        function getTypeFromBindingElement(element, includePatternInType) {
+            if (element.initializer) {
+                var type = checkExpressionCached(element.initializer);
+                reportErrorsFromWidening(element, type);
+                return getWidenedType(type);
+            }
+            if (ts.isBindingPattern(element.name)) {
+                return getTypeFromBindingPattern(element.name, includePatternInType);
+            }
+            if (compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
+                reportImplicitAnyError(element, anyType);
+            }
+            return anyType;
+        }
+        function getTypeFromObjectBindingPattern(pattern, includePatternInType) {
+            var members = {};
+            var hasComputedProperties = false;
+            ts.forEach(pattern.elements, function (e) {
+                var name = e.propertyName || e.name;
+                if (isComputedNonLiteralName(name)) {
+                    hasComputedProperties = true;
+                    return;
+                }
+                var text = getTextOfPropertyName(name);
+                var flags = 4 | 67108864 | (e.initializer ? 536870912 : 0);
+                var symbol = createSymbol(flags, text);
+                symbol.type = getTypeFromBindingElement(e, includePatternInType);
+                symbol.bindingElement = e;
+                members[symbol.name] = symbol;
+            });
+            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined);
+            if (includePatternInType) {
+                result.pattern = pattern;
+            }
+            if (hasComputedProperties) {
+                result.flags |= 67108864;
+            }
+            return result;
+        }
+        function getTypeFromArrayBindingPattern(pattern, includePatternInType) {
+            var elements = pattern.elements;
+            if (elements.length === 0 || elements[elements.length - 1].dotDotDotToken) {
+                return languageVersion >= 2 ? createIterableType(anyType) : anyArrayType;
+            }
+            var elementTypes = ts.map(elements, function (e) { return e.kind === 193 ? anyType : getTypeFromBindingElement(e, includePatternInType); });
+            if (includePatternInType) {
+                var result = createNewTupleType(elementTypes);
+                result.pattern = pattern;
+                return result;
+            }
+            return createTupleType(elementTypes);
+        }
+        function getTypeFromBindingPattern(pattern, includePatternInType) {
+            return pattern.kind === 167
+                ? getTypeFromObjectBindingPattern(pattern, includePatternInType)
+                : getTypeFromArrayBindingPattern(pattern, includePatternInType);
+        }
+        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
+            var type = getTypeForVariableLikeDeclaration(declaration, true);
+            if (type) {
+                if (reportErrors) {
+                    reportErrorsFromWidening(declaration, type);
+                }
+                if (declaration.kind === 253) {
+                    return type;
+                }
+                return getWidenedType(type);
+            }
+            type = declaration.dotDotDotToken ? anyArrayType : anyType;
+            if (reportErrors && compilerOptions.noImplicitAny) {
+                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
+                    reportImplicitAnyError(declaration, type);
+                }
+            }
+            return type;
+        }
+        function declarationBelongsToPrivateAmbientMember(declaration) {
+            var root = ts.getRootDeclaration(declaration);
+            var memberDeclaration = root.kind === 142 ? root.parent : root;
+            return isPrivateWithinAmbient(memberDeclaration);
+        }
+        function getTypeOfVariableOrParameterOrProperty(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                if (symbol.flags & 134217728) {
+                    return links.type = getTypeOfPrototypeProperty(symbol);
+                }
+                var declaration = symbol.valueDeclaration;
+                if (declaration.parent.kind === 252) {
+                    return links.type = anyType;
+                }
+                if (declaration.kind === 235) {
+                    return links.type = checkExpression(declaration.expression);
+                }
+                if (declaration.kind === 187) {
+                    return links.type = getUnionType(ts.map(symbol.declarations, function (decl) { return checkExpressionCached(decl.right); }));
+                }
+                if (declaration.kind === 172) {
+                    if (declaration.parent.kind === 187) {
+                        return links.type = checkExpressionCached(declaration.parent.right);
+                    }
+                }
+                if (!pushTypeResolution(symbol, 0)) {
+                    return unknownType;
+                }
+                var type = getWidenedTypeForVariableLikeDeclaration(declaration, true);
+                if (!popTypeResolution()) {
+                    if (symbol.valueDeclaration.type) {
+                        type = unknownType;
+                        error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
+                    }
+                    else {
+                        type = anyType;
+                        if (compilerOptions.noImplicitAny) {
+                            error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
+                        }
+                    }
+                }
+                links.type = type;
+            }
+            return links.type;
+        }
+        function getAnnotatedAccessorType(accessor) {
+            if (accessor) {
+                if (accessor.kind === 149) {
+                    return accessor.type && getTypeFromTypeNode(accessor.type);
+                }
+                else {
+                    var setterTypeAnnotation = ts.getSetAccessorTypeAnnotationNode(accessor);
+                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
+                }
+            }
+            return undefined;
+        }
+        function getAnnotatedAccessorThisType(accessor) {
+            if (accessor) {
+                var parameter = getAccessorThisParameter(accessor);
+                if (parameter && parameter.type) {
+                    return getTypeFromTypeNode(accessor.parameters[0].type);
+                }
+            }
+            return undefined;
+        }
+        function getTypeOfAccessors(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var getter = ts.getDeclarationOfKind(symbol, 149);
+                var setter = ts.getDeclarationOfKind(symbol, 150);
+                if (getter && getter.flags & 134217728) {
+                    var jsDocType = getTypeForVariableLikeDeclarationFromJSDocComment(getter);
+                    if (jsDocType) {
+                        return links.type = jsDocType;
+                    }
+                }
+                if (!pushTypeResolution(symbol, 0)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                var getterReturnType = getAnnotatedAccessorType(getter);
+                if (getterReturnType) {
+                    type = getterReturnType;
+                }
+                else {
+                    var setterParameterType = getAnnotatedAccessorType(setter);
+                    if (setterParameterType) {
+                        type = setterParameterType;
+                    }
+                    else {
+                        if (getter && getter.body) {
+                            type = getReturnTypeFromBody(getter);
+                        }
+                        else {
+                            if (compilerOptions.noImplicitAny) {
+                                error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation, symbolToString(symbol));
+                            }
+                            type = anyType;
+                        }
+                    }
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (compilerOptions.noImplicitAny) {
+                        var getter_1 = ts.getDeclarationOfKind(symbol, 149);
+                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
+                    }
+                }
+                links.type = type;
+            }
+            return links.type;
+        }
+        function getTypeOfFuncClassEnumModule(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var type = createObjectType(65536, symbol);
+                links.type = strictNullChecks && symbol.flags & 536870912 ?
+                    addTypeKind(type, 32) : type;
+            }
+            return links.type;
+        }
+        function getTypeOfEnumMember(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                links.type = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
+            }
+            return links.type;
+        }
+        function getTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var targetSymbol = resolveAlias(symbol);
+                links.type = targetSymbol.flags & 107455
+                    ? getTypeOfSymbol(targetSymbol)
+                    : unknownType;
+            }
+            return links.type;
+        }
+        function getTypeOfInstantiatedSymbol(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                links.type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
+            }
+            return links.type;
+        }
+        function getTypeOfSymbol(symbol) {
+            if (symbol.flags & 16777216) {
+                return getTypeOfInstantiatedSymbol(symbol);
+            }
+            if (symbol.flags & (3 | 4)) {
+                return getTypeOfVariableOrParameterOrProperty(symbol);
+            }
+            if (symbol.flags & (16 | 8192 | 32 | 384 | 512)) {
+                return getTypeOfFuncClassEnumModule(symbol);
+            }
+            if (symbol.flags & 8) {
+                return getTypeOfEnumMember(symbol);
+            }
+            if (symbol.flags & 98304) {
+                return getTypeOfAccessors(symbol);
+            }
+            if (symbol.flags & 8388608) {
+                return getTypeOfAlias(symbol);
+            }
+            return unknownType;
+        }
+        function getTargetType(type) {
+            return type.flags & 4096 ? type.target : type;
+        }
+        function hasBaseType(type, checkBase) {
+            return check(type);
+            function check(type) {
+                var target = getTargetType(type);
+                return target === checkBase || ts.forEach(getBaseTypes(target), check);
+            }
+        }
+        function appendTypeParameters(typeParameters, declarations) {
+            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
+                var declaration = declarations_2[_i];
+                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
+                if (!typeParameters) {
+                    typeParameters = [tp];
+                }
+                else if (!ts.contains(typeParameters, tp)) {
+                    typeParameters.push(tp);
+                }
+            }
+            return typeParameters;
+        }
+        function appendOuterTypeParameters(typeParameters, node) {
+            while (true) {
+                node = node.parent;
+                if (!node) {
+                    return typeParameters;
+                }
+                if (node.kind === 221 || node.kind === 192 ||
+                    node.kind === 220 || node.kind === 179 ||
+                    node.kind === 147 || node.kind === 180) {
+                    var declarations = node.typeParameters;
+                    if (declarations) {
+                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
+                    }
+                }
+            }
+        }
+        function getOuterTypeParametersOfClassOrInterface(symbol) {
+            var declaration = symbol.flags & 32 ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222);
+            return appendOuterTypeParameters(undefined, declaration);
+        }
+        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
+            var result;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var node = _a[_i];
+                if (node.kind === 222 || node.kind === 221 ||
+                    node.kind === 192 || node.kind === 223) {
+                    var declaration = node;
+                    if (declaration.typeParameters) {
+                        result = appendTypeParameters(result, declaration.typeParameters);
+                    }
+                }
+            }
+            return result;
+        }
+        function getTypeParametersOfClassOrInterface(symbol) {
+            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
+        }
+        function isConstructorType(type) {
+            return type.flags & 80896 && getSignaturesOfType(type, 1).length > 0;
+        }
+        function getBaseTypeNodeOfClass(type) {
+            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
+        }
+        function getConstructorsForTypeArguments(type, typeArgumentNodes) {
+            var typeArgCount = typeArgumentNodes ? typeArgumentNodes.length : 0;
+            return ts.filter(getSignaturesOfType(type, 1), function (sig) { return (sig.typeParameters ? sig.typeParameters.length : 0) === typeArgCount; });
+        }
+        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes) {
+            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes);
+            if (typeArgumentNodes) {
+                var typeArguments_1 = ts.map(typeArgumentNodes, getTypeFromTypeNode);
+                signatures = ts.map(signatures, function (sig) { return getSignatureInstantiation(sig, typeArguments_1); });
+            }
+            return signatures;
+        }
+        function getBaseConstructorTypeOfClass(type) {
+            if (!type.resolvedBaseConstructorType) {
+                var baseTypeNode = getBaseTypeNodeOfClass(type);
+                if (!baseTypeNode) {
+                    return type.resolvedBaseConstructorType = undefinedType;
+                }
+                if (!pushTypeResolution(type, 1)) {
+                    return unknownType;
+                }
+                var baseConstructorType = checkExpression(baseTypeNode.expression);
+                if (baseConstructorType.flags & 80896) {
+                    resolveStructuredTypeMembers(baseConstructorType);
+                }
+                if (!popTypeResolution()) {
+                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                if (baseConstructorType !== unknownType && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
+                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                type.resolvedBaseConstructorType = baseConstructorType;
+            }
+            return type.resolvedBaseConstructorType;
+        }
+        function getBaseTypes(type) {
+            var isClass = type.symbol.flags & 32;
+            var isInterface = type.symbol.flags & 64;
+            if (!type.resolvedBaseTypes) {
+                if (!isClass && !isInterface) {
+                    ts.Debug.fail("type must be class or interface");
+                }
+                if (isClass) {
+                    resolveBaseTypesOfClass(type);
+                }
+                if (isInterface) {
+                    resolveBaseTypesOfInterface(type);
+                }
+            }
+            return type.resolvedBaseTypes;
+        }
+        function resolveBaseTypesOfClass(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            var baseConstructorType = getBaseConstructorTypeOfClass(type);
+            if (!(baseConstructorType.flags & 80896)) {
+                return;
+            }
+            var baseTypeNode = getBaseTypeNodeOfClass(type);
+            var baseType;
+            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
+            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 &&
+                areAllOuterTypeParametersApplied(originalBaseType)) {
+                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol);
+            }
+            else {
+                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments);
+                if (!constructors.length) {
+                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
+                    return;
+                }
+                baseType = getReturnTypeOfSignature(constructors[0]);
+            }
+            if (baseType === unknownType) {
+                return;
+            }
+            if (!(getTargetType(baseType).flags & (1024 | 2048))) {
+                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
+                return;
+            }
+            if (type === baseType || hasBaseType(baseType, type)) {
+                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 1));
+                return;
+            }
+            if (type.resolvedBaseTypes === emptyArray) {
+                type.resolvedBaseTypes = [baseType];
+            }
+            else {
+                type.resolvedBaseTypes.push(baseType);
+            }
+        }
+        function areAllOuterTypeParametersApplied(type) {
+            var outerTypeParameters = type.outerTypeParameters;
+            if (outerTypeParameters) {
+                var last = outerTypeParameters.length - 1;
+                var typeArguments = type.typeArguments;
+                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
+            }
+            return true;
+        }
+        function resolveBaseTypesOfInterface(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 222 && ts.getInterfaceBaseTypeNodes(declaration)) {
+                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
+                        var node = _c[_b];
+                        var baseType = getTypeFromTypeNode(node);
+                        if (baseType !== unknownType) {
+                            if (getTargetType(baseType).flags & (1024 | 2048)) {
+                                if (type !== baseType && !hasBaseType(baseType, type)) {
+                                    if (type.resolvedBaseTypes === emptyArray) {
+                                        type.resolvedBaseTypes = [baseType];
+                                    }
+                                    else {
+                                        type.resolvedBaseTypes.push(baseType);
+                                    }
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, undefined, 1));
+                                }
+                            }
+                            else {
+                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        function isIndependentInterface(symbol) {
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 222) {
+                    if (declaration.flags & 16384) {
+                        return false;
+                    }
+                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
+                    if (baseTypeNodes) {
+                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
+                            var node = baseTypeNodes_1[_b];
+                            if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                                var baseSymbol = resolveEntityName(node.expression, 793056, true);
+                                if (!baseSymbol || !(baseSymbol.flags & 64) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
+                                    return false;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            return true;
+        }
+        function getDeclaredTypeOfClassOrInterface(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var kind = symbol.flags & 32 ? 1024 : 2048;
+                var type = links.declaredType = createObjectType(kind, symbol);
+                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
+                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                if (outerTypeParameters || localTypeParameters || kind === 1024 || !isIndependentInterface(symbol)) {
+                    type.flags |= 4096;
+                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
+                    type.outerTypeParameters = outerTypeParameters;
+                    type.localTypeParameters = localTypeParameters;
+                    type.instantiations = {};
+                    type.instantiations[getTypeListId(type.typeParameters)] = type;
+                    type.target = type;
+                    type.typeArguments = type.typeParameters;
+                    type.thisType = createType(512 | 33554432);
+                    type.thisType.symbol = symbol;
+                    type.thisType.constraint = type;
+                }
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfTypeAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                if (!pushTypeResolution(symbol, 2)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                var declaration = ts.getDeclarationOfKind(symbol, 279);
+                if (declaration) {
+                    if (declaration.jsDocTypeLiteral) {
+                        type = getTypeFromTypeNode(declaration.jsDocTypeLiteral);
+                    }
+                    else {
+                        type = getTypeFromTypeNode(declaration.typeExpression.type);
+                    }
+                }
+                else {
+                    declaration = ts.getDeclarationOfKind(symbol, 223);
+                    type = getTypeFromTypeNode(declaration.type);
+                }
+                if (popTypeResolution()) {
+                    links.typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                    if (links.typeParameters) {
+                        links.instantiations = {};
+                        links.instantiations[getTypeListId(links.typeParameters)] = type;
+                    }
+                }
+                else {
+                    type = unknownType;
+                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
+                }
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfEnum(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var type = createType(128);
+                type.symbol = symbol;
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfTypeParameter(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var type = createType(512);
+                type.symbol = symbol;
+                if (!ts.getDeclarationOfKind(symbol, 141).constraint) {
+                    type.constraint = noConstraintType;
+                }
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfSymbol(symbol) {
+            ts.Debug.assert((symbol.flags & 16777216) === 0);
+            if (symbol.flags & (32 | 64)) {
+                return getDeclaredTypeOfClassOrInterface(symbol);
+            }
+            if (symbol.flags & 524288) {
+                return getDeclaredTypeOfTypeAlias(symbol);
+            }
+            if (symbol.flags & 384) {
+                return getDeclaredTypeOfEnum(symbol);
+            }
+            if (symbol.flags & 262144) {
+                return getDeclaredTypeOfTypeParameter(symbol);
+            }
+            if (symbol.flags & 8388608) {
+                return getDeclaredTypeOfAlias(symbol);
+            }
+            return unknownType;
+        }
+        function isIndependentTypeReference(node) {
+            if (node.typeArguments) {
+                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
+                    var typeNode = _a[_i];
+                    if (!isIndependentType(typeNode)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function isIndependentType(node) {
+            switch (node.kind) {
+                case 117:
+                case 132:
+                case 130:
+                case 120:
+                case 133:
+                case 103:
+                case 135:
+                case 93:
+                case 127:
+                case 166:
+                    return true;
+                case 160:
+                    return isIndependentType(node.elementType);
+                case 155:
+                    return isIndependentTypeReference(node);
+            }
+            return false;
+        }
+        function isIndependentVariableLikeDeclaration(node) {
+            return node.type && isIndependentType(node.type) || !node.type && !node.initializer;
+        }
+        function isIndependentFunctionLikeDeclaration(node) {
+            if (node.kind !== 148 && (!node.type || !isIndependentType(node.type))) {
+                return false;
+            }
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                if (!isIndependentVariableLikeDeclaration(parameter)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        function isIndependentMember(symbol) {
+            if (symbol.declarations && symbol.declarations.length === 1) {
+                var declaration = symbol.declarations[0];
+                if (declaration) {
+                    switch (declaration.kind) {
+                        case 145:
+                        case 144:
+                            return isIndependentVariableLikeDeclaration(declaration);
+                        case 147:
+                        case 146:
+                        case 148:
+                            return isIndependentFunctionLikeDeclaration(declaration);
+                    }
+                }
+            }
+            return false;
+        }
+        function createSymbolTable(symbols) {
+            var result = {};
+            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
+                var symbol = symbols_1[_i];
+                result[symbol.name] = symbol;
+            }
+            return result;
+        }
+        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
+            var result = {};
+            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
+                var symbol = symbols_2[_i];
+                result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper);
+            }
+            return result;
+        }
+        function addInheritedMembers(symbols, baseSymbols) {
+            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
+                var s = baseSymbols_1[_i];
+                if (!ts.hasProperty(symbols, s.name)) {
+                    symbols[s.name] = s;
+                }
+            }
+        }
+        function resolveDeclaredMembers(type) {
+            if (!type.declaredProperties) {
+                var symbol = type.symbol;
+                type.declaredProperties = getNamedMembers(symbol.members);
+                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members["__call"]);
+                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members["__new"]);
+                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
+                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
+            }
+            return type;
+        }
+        function getTypeWithThisArgument(type, thisArgument) {
+            if (type.flags & 4096) {
+                return createTypeReference(type.target, ts.concatenate(type.typeArguments, [thisArgument || type.target.thisType]));
+            }
+            return type;
+        }
+        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
+            var mapper = identityMapper;
+            var members = source.symbol.members;
+            var callSignatures = source.declaredCallSignatures;
+            var constructSignatures = source.declaredConstructSignatures;
+            var stringIndexInfo = source.declaredStringIndexInfo;
+            var numberIndexInfo = source.declaredNumberIndexInfo;
+            if (!ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
+                mapper = createTypeMapper(typeParameters, typeArguments);
+                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, typeParameters.length === 1);
+                callSignatures = instantiateList(source.declaredCallSignatures, mapper, instantiateSignature);
+                constructSignatures = instantiateList(source.declaredConstructSignatures, mapper, instantiateSignature);
+                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
+                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
+            }
+            var baseTypes = getBaseTypes(source);
+            if (baseTypes.length) {
+                if (members === source.symbol.members) {
+                    members = createSymbolTable(source.declaredProperties);
+                }
+                var thisArgument = ts.lastOrUndefined(typeArguments);
+                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
+                    var baseType = baseTypes_1[_i];
+                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
+                    addInheritedMembers(members, getPropertiesOfObjectType(instantiatedBaseType));
+                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0));
+                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1));
+                    stringIndexInfo = stringIndexInfo || getIndexInfoOfType(instantiatedBaseType, 0);
+                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1);
+                }
+            }
+            setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function resolveClassOrInterfaceMembers(type) {
+            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
+        }
+        function resolveTypeReferenceMembers(type) {
+            var source = resolveDeclaredMembers(type.target);
+            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
+            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
+                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
+            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
+        }
+        function createSignature(declaration, typeParameters, thisType, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasStringLiterals) {
+            var sig = new Signature(checker);
+            sig.declaration = declaration;
+            sig.typeParameters = typeParameters;
+            sig.parameters = parameters;
+            sig.thisType = thisType;
+            sig.resolvedReturnType = resolvedReturnType;
+            sig.typePredicate = typePredicate;
+            sig.minArgumentCount = minArgumentCount;
+            sig.hasRestParameter = hasRestParameter;
+            sig.hasStringLiterals = hasStringLiterals;
+            return sig;
+        }
+        function cloneSignature(sig) {
+            return createSignature(sig.declaration, sig.typeParameters, sig.thisType, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasStringLiterals);
+        }
+        function getDefaultConstructSignatures(classType) {
+            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+            var baseSignatures = getSignaturesOfType(baseConstructorType, 1);
+            if (baseSignatures.length === 0) {
+                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, undefined, 0, false, false)];
+            }
+            var baseTypeNode = getBaseTypeNodeOfClass(classType);
+            var typeArguments = ts.map(baseTypeNode.typeArguments, getTypeFromTypeNode);
+            var typeArgCount = typeArguments ? typeArguments.length : 0;
+            var result = [];
+            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
+                var baseSig = baseSignatures_1[_i];
+                var typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
+                if (typeParamCount === typeArgCount) {
+                    var sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
+                    sig.typeParameters = classType.localTypeParameters;
+                    sig.resolvedReturnType = classType;
+                    result.push(sig);
+                }
+            }
+            return result;
+        }
+        function createTupleTypeMemberSymbols(memberTypes) {
+            var members = {};
+            for (var i = 0; i < memberTypes.length; i++) {
+                var symbol = createSymbol(4 | 67108864, "" + i);
+                symbol.type = memberTypes[i];
+                members[i] = symbol;
+            }
+            return members;
+        }
+        function resolveTupleTypeMembers(type) {
+            var arrayElementType = getUnionType(type.elementTypes, true);
+            var arrayType = resolveStructuredTypeMembers(createTypeFromGenericGlobalType(globalArrayType, [arrayElementType, type]));
+            var members = createTupleTypeMemberSymbols(type.elementTypes);
+            addInheritedMembers(members, arrayType.properties);
+            setObjectTypeMembers(type, members, arrayType.callSignatures, arrayType.constructSignatures, arrayType.stringIndexInfo, arrayType.numberIndexInfo);
+        }
+        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
+            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
+                var s = signatureList_1[_i];
+                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
+                    return s;
+                }
+            }
+        }
+        function findMatchingSignatures(signatureLists, signature, listIndex) {
+            if (signature.typeParameters) {
+                if (listIndex > 0) {
+                    return undefined;
+                }
+                for (var i = 1; i < signatureLists.length; i++) {
+                    if (!findMatchingSignature(signatureLists[i], signature, false, false, false)) {
+                        return undefined;
+                    }
+                }
+                return [signature];
+            }
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, true, true, true);
+                if (!match) {
+                    return undefined;
+                }
+                if (!ts.contains(result, match)) {
+                    (result || (result = [])).push(match);
+                }
+            }
+            return result;
+        }
+        function getUnionSignatures(types, kind) {
+            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
+                    var signature = _a[_i];
+                    if (!result || !findMatchingSignature(result, signature, false, true, true)) {
+                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
+                        if (unionSignatures) {
+                            var s = signature;
+                            if (unionSignatures.length > 1) {
+                                s = cloneSignature(signature);
+                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisType; })) {
+                                    s.thisType = getUnionType(ts.map(unionSignatures, function (sig) { return sig.thisType || anyType; }));
+                                }
+                                s.resolvedReturnType = undefined;
+                                s.unionSignatures = unionSignatures;
+                            }
+                            (result || (result = [])).push(s);
+                        }
+                    }
+                }
+            }
+            return result || emptyArray;
+        }
+        function getUnionIndexInfo(types, kind) {
+            var indexTypes = [];
+            var isAnyReadonly = false;
+            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
+                var type = types_1[_i];
+                var indexInfo = getIndexInfoOfType(type, kind);
+                if (!indexInfo) {
+                    return undefined;
+                }
+                indexTypes.push(indexInfo.type);
+                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
+            }
+            return createIndexInfo(getUnionType(indexTypes), isAnyReadonly);
+        }
+        function resolveUnionTypeMembers(type) {
+            var callSignatures = getUnionSignatures(type.types, 0);
+            var constructSignatures = getUnionSignatures(type.types, 1);
+            var stringIndexInfo = getUnionIndexInfo(type.types, 0);
+            var numberIndexInfo = getUnionIndexInfo(type.types, 1);
+            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function intersectTypes(type1, type2) {
+            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
+        }
+        function intersectIndexInfos(info1, info2) {
+            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
+        }
+        function resolveIntersectionTypeMembers(type) {
+            var callSignatures = emptyArray;
+            var constructSignatures = emptyArray;
+            var stringIndexInfo = undefined;
+            var numberIndexInfo = undefined;
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0));
+                constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(t, 1));
+                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0));
+                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1));
+            }
+            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function resolveAnonymousTypeMembers(type) {
+            var symbol = type.symbol;
+            if (type.target) {
+                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, false);
+                var callSignatures = instantiateList(getSignaturesOfType(type.target, 0), type.mapper, instantiateSignature);
+                var constructSignatures = instantiateList(getSignaturesOfType(type.target, 1), type.mapper, instantiateSignature);
+                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0), type.mapper);
+                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1), type.mapper);
+                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else if (symbol.flags & 2048) {
+                var members = symbol.members;
+                var callSignatures = getSignaturesOfSymbol(members["__call"]);
+                var constructSignatures = getSignaturesOfSymbol(members["__new"]);
+                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0);
+                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1);
+                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else {
+                var members = emptySymbols;
+                var constructSignatures = emptyArray;
+                if (symbol.flags & 1952) {
+                    members = getExportsOfSymbol(symbol);
+                }
+                if (symbol.flags & 32) {
+                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
+                    constructSignatures = getSignaturesOfSymbol(symbol.members["__constructor"]);
+                    if (!constructSignatures.length) {
+                        constructSignatures = getDefaultConstructSignatures(classType);
+                    }
+                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+                    if (baseConstructorType.flags & 80896) {
+                        members = createSymbolTable(getNamedMembers(members));
+                        addInheritedMembers(members, getPropertiesOfObjectType(baseConstructorType));
+                    }
+                }
+                var numberIndexInfo = symbol.flags & 384 ? enumNumberIndexInfo : undefined;
+                setObjectTypeMembers(type, members, emptyArray, constructSignatures, undefined, numberIndexInfo);
+                if (symbol.flags & (16 | 8192)) {
+                    type.callSignatures = getSignaturesOfSymbol(symbol);
+                }
+            }
+        }
+        function resolveStructuredTypeMembers(type) {
+            if (!type.members) {
+                if (type.flags & 4096) {
+                    resolveTypeReferenceMembers(type);
+                }
+                else if (type.flags & (1024 | 2048)) {
+                    resolveClassOrInterfaceMembers(type);
+                }
+                else if (type.flags & 65536) {
+                    resolveAnonymousTypeMembers(type);
+                }
+                else if (type.flags & 8192) {
+                    resolveTupleTypeMembers(type);
+                }
+                else if (type.flags & 16384) {
+                    resolveUnionTypeMembers(type);
+                }
+                else if (type.flags & 32768) {
+                    resolveIntersectionTypeMembers(type);
+                }
+            }
+            return type;
+        }
+        function getPropertiesOfObjectType(type) {
+            if (type.flags & 80896) {
+                return resolveStructuredTypeMembers(type).properties;
+            }
+            return emptyArray;
+        }
+        function getPropertyOfObjectType(type, name) {
+            if (type.flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (ts.hasProperty(resolved.members, name)) {
+                    var symbol = resolved.members[name];
+                    if (symbolIsValue(symbol)) {
+                        return symbol;
+                    }
+                }
+            }
+        }
+        function getPropertiesOfUnionOrIntersectionType(type) {
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var current = _a[_i];
+                for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
+                    var prop = _c[_b];
+                    getPropertyOfUnionOrIntersectionType(type, prop.name);
+                }
+                if (type.flags & 16384) {
+                    break;
+                }
+            }
+            return type.resolvedProperties ? symbolsToArray(type.resolvedProperties) : emptyArray;
+        }
+        function getPropertiesOfType(type) {
+            type = getApparentType(type);
+            return type.flags & 49152 ? getPropertiesOfUnionOrIntersectionType(type) : getPropertiesOfObjectType(type);
+        }
+        function getApparentTypeOfTypeParameter(type) {
+            if (!type.resolvedApparentType) {
+                var constraintType = getConstraintOfTypeParameter(type);
+                while (constraintType && constraintType.flags & 512) {
+                    constraintType = getConstraintOfTypeParameter(constraintType);
+                }
+                type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type);
+            }
+            return type.resolvedApparentType;
+        }
+        function getApparentType(type) {
+            if (type.flags & 512) {
+                type = getApparentTypeOfTypeParameter(type);
+            }
+            if (type.flags & 258) {
+                type = globalStringType;
+            }
+            else if (type.flags & 132) {
+                type = globalNumberType;
+            }
+            else if (type.flags & 8) {
+                type = globalBooleanType;
+            }
+            else if (type.flags & 16777216) {
+                type = getGlobalESSymbolType();
+            }
+            return type;
+        }
+        function createUnionOrIntersectionProperty(containingType, name) {
+            var types = containingType.types;
+            var props;
+            var commonFlags = (containingType.flags & 32768) ? 536870912 : 0;
+            for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
+                var current = types_2[_i];
+                var type = getApparentType(current);
+                if (type !== unknownType) {
+                    var prop = getPropertyOfType(type, name);
+                    if (prop && !(getDeclarationFlagsFromSymbol(prop) & (8 | 16))) {
+                        commonFlags &= prop.flags;
+                        if (!props) {
+                            props = [prop];
+                        }
+                        else if (!ts.contains(props, prop)) {
+                            props.push(prop);
+                        }
+                    }
+                    else if (containingType.flags & 16384) {
+                        return undefined;
+                    }
+                }
+            }
+            if (!props) {
+                return undefined;
+            }
+            if (props.length === 1) {
+                return props[0];
+            }
+            var propTypes = [];
+            var declarations = [];
+            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
+                var prop = props_1[_a];
+                if (prop.declarations) {
+                    ts.addRange(declarations, prop.declarations);
+                }
+                propTypes.push(getTypeOfSymbol(prop));
+            }
+            var result = createSymbol(4 |
+                67108864 |
+                268435456 |
+                commonFlags, name);
+            result.containingType = containingType;
+            result.declarations = declarations;
+            result.type = containingType.flags & 16384 ? getUnionType(propTypes) : getIntersectionType(propTypes);
+            return result;
+        }
+        function getPropertyOfUnionOrIntersectionType(type, name) {
+            var properties = type.resolvedProperties || (type.resolvedProperties = {});
+            if (ts.hasProperty(properties, name)) {
+                return properties[name];
+            }
+            var property = createUnionOrIntersectionProperty(type, name);
+            if (property) {
+                properties[name] = property;
+            }
+            return property;
+        }
+        function getPropertyOfType(type, name) {
+            type = getApparentType(type);
+            if (type.flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (ts.hasProperty(resolved.members, name)) {
+                    var symbol = resolved.members[name];
+                    if (symbolIsValue(symbol)) {
+                        return symbol;
+                    }
+                }
+                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
+                    var symbol = getPropertyOfObjectType(globalFunctionType, name);
+                    if (symbol) {
+                        return symbol;
+                    }
+                }
+                return getPropertyOfObjectType(globalObjectType, name);
+            }
+            if (type.flags & 49152) {
+                return getPropertyOfUnionOrIntersectionType(type, name);
+            }
+            return undefined;
+        }
+        function getSignaturesOfStructuredType(type, kind) {
+            if (type.flags & 130048) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 ? resolved.callSignatures : resolved.constructSignatures;
+            }
+            return emptyArray;
+        }
+        function getSignaturesOfType(type, kind) {
+            return getSignaturesOfStructuredType(getApparentType(type), kind);
+        }
+        function getIndexInfoOfStructuredType(type, kind) {
+            if (type.flags & 130048) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 ? resolved.stringIndexInfo : resolved.numberIndexInfo;
+            }
+        }
+        function getIndexTypeOfStructuredType(type, kind) {
+            var info = getIndexInfoOfStructuredType(type, kind);
+            return info && info.type;
+        }
+        function getIndexInfoOfType(type, kind) {
+            return getIndexInfoOfStructuredType(getApparentType(type), kind);
+        }
+        function getIndexTypeOfType(type, kind) {
+            return getIndexTypeOfStructuredType(getApparentType(type), kind);
+        }
+        function getImplicitIndexTypeOfType(type, kind) {
+            if (isObjectLiteralType(type)) {
+                var propTypes = [];
+                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 || isNumericLiteralName(prop.name)) {
+                        propTypes.push(getTypeOfSymbol(prop));
+                    }
+                }
+                if (propTypes.length) {
+                    return getUnionType(propTypes);
+                }
+            }
+            return undefined;
+        }
+        function getTypeParametersFromJSDocTemplate(declaration) {
+            if (declaration.flags & 134217728) {
+                var templateTag = ts.getJSDocTemplateTag(declaration);
+                if (templateTag) {
+                    return getTypeParametersFromDeclaration(templateTag.typeParameters);
+                }
+            }
+            return undefined;
+        }
+        function getTypeParametersFromDeclaration(typeParameterDeclarations) {
+            var result = [];
+            ts.forEach(typeParameterDeclarations, function (node) {
+                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
+                if (!ts.contains(result, tp)) {
+                    result.push(tp);
+                }
+            });
+            return result;
+        }
+        function symbolsToArray(symbols) {
+            var result = [];
+            for (var id in symbols) {
+                if (!isReservedMemberName(id)) {
+                    result.push(symbols[id]);
+                }
+            }
+            return result;
+        }
+        function isOptionalParameter(node) {
+            if (node.flags & 134217728) {
+                if (node.type && node.type.kind === 268) {
+                    return true;
+                }
+                var paramTag = ts.getCorrespondingJSDocParameterTag(node);
+                if (paramTag) {
+                    if (paramTag.isBracketed) {
+                        return true;
+                    }
+                    if (paramTag.typeExpression) {
+                        return paramTag.typeExpression.type.kind === 268;
+                    }
+                }
+            }
+            if (ts.hasQuestionToken(node)) {
+                return true;
+            }
+            if (node.initializer) {
+                var signatureDeclaration = node.parent;
+                var signature = getSignatureFromDeclaration(signatureDeclaration);
+                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
+                ts.Debug.assert(parameterIndex >= 0);
+                return parameterIndex >= signature.minArgumentCount;
+            }
+            return false;
+        }
+        function createTypePredicateFromTypePredicateNode(node) {
+            if (node.parameterName.kind === 69) {
+                var parameterName = node.parameterName;
+                return {
+                    kind: 1,
+                    parameterName: parameterName ? parameterName.text : undefined,
+                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
+                    type: getTypeFromTypeNode(node.type)
+                };
+            }
+            else {
+                return {
+                    kind: 0,
+                    type: getTypeFromTypeNode(node.type)
+                };
+            }
+        }
+        function getSignatureFromDeclaration(declaration) {
+            var links = getNodeLinks(declaration);
+            if (!links.resolvedSignature) {
+                var parameters = [];
+                var hasStringLiterals = false;
+                var minArgumentCount = -1;
+                var thisType = undefined;
+                var hasThisParameter = void 0;
+                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
+                for (var i = isJSConstructSignature ? 1 : 0, n = declaration.parameters.length; i < n; i++) {
+                    var param = declaration.parameters[i];
+                    var paramSymbol = param.symbol;
+                    if (paramSymbol && !!(paramSymbol.flags & 4) && !ts.isBindingPattern(param.name)) {
+                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455, undefined, undefined);
+                        paramSymbol = resolvedSymbol;
+                    }
+                    if (i === 0 && paramSymbol.name === "this") {
+                        hasThisParameter = true;
+                        thisType = param.type ? getTypeFromTypeNode(param.type) : unknownType;
+                    }
+                    else {
+                        parameters.push(paramSymbol);
+                    }
+                    if (param.type && param.type.kind === 166) {
+                        hasStringLiterals = true;
+                    }
+                    if (param.initializer || param.questionToken || param.dotDotDotToken) {
+                        if (minArgumentCount < 0) {
+                            minArgumentCount = i - (hasThisParameter ? 1 : 0);
+                        }
+                    }
+                    else {
+                        minArgumentCount = -1;
+                    }
+                }
+                if ((declaration.kind === 149 || declaration.kind === 150) &&
+                    !ts.hasDynamicName(declaration) &&
+                    (!hasThisParameter || thisType === unknownType)) {
+                    var otherKind = declaration.kind === 149 ? 150 : 149;
+                    var setter = ts.getDeclarationOfKind(declaration.symbol, otherKind);
+                    thisType = getAnnotatedAccessorThisType(setter);
+                }
+                if (minArgumentCount < 0) {
+                    minArgumentCount = declaration.parameters.length - (hasThisParameter ? 1 : 0);
+                }
+                if (isJSConstructSignature) {
+                    minArgumentCount--;
+                }
+                var classType = declaration.kind === 148 ?
+                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
+                    : undefined;
+                var typeParameters = classType ? classType.localTypeParameters :
+                    declaration.typeParameters ? getTypeParametersFromDeclaration(declaration.typeParameters) :
+                        getTypeParametersFromJSDocTemplate(declaration);
+                var returnType = getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType);
+                var typePredicate = declaration.type && declaration.type.kind === 154 ?
+                    createTypePredicateFromTypePredicateNode(declaration.type) :
+                    undefined;
+                links.resolvedSignature = createSignature(declaration, typeParameters, thisType, parameters, returnType, typePredicate, minArgumentCount, ts.hasRestParameter(declaration), hasStringLiterals);
+            }
+            return links.resolvedSignature;
+        }
+        function getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType) {
+            if (isJSConstructSignature) {
+                return getTypeFromTypeNode(declaration.parameters[0].type);
+            }
+            else if (classType) {
+                return classType;
+            }
+            else if (declaration.type) {
+                return getTypeFromTypeNode(declaration.type);
+            }
+            if (declaration.flags & 134217728) {
+                var type = getReturnTypeFromJSDocComment(declaration);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            if (declaration.kind === 149 && !ts.hasDynamicName(declaration)) {
+                var setter = ts.getDeclarationOfKind(declaration.symbol, 150);
+                return getAnnotatedAccessorType(setter);
+            }
+            if (ts.nodeIsMissing(declaration.body)) {
+                return anyType;
+            }
+        }
+        function getSignaturesOfSymbol(symbol) {
+            if (!symbol)
+                return emptyArray;
+            var result = [];
+            for (var i = 0, len = symbol.declarations.length; i < len; i++) {
+                var node = symbol.declarations[i];
+                switch (node.kind) {
+                    case 156:
+                    case 157:
+                    case 220:
+                    case 147:
+                    case 146:
+                    case 148:
+                    case 151:
+                    case 152:
+                    case 153:
+                    case 149:
+                    case 150:
+                    case 179:
+                    case 180:
+                    case 269:
+                        if (i > 0 && node.body) {
+                            var previous = symbol.declarations[i - 1];
+                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
+                                break;
+                            }
+                        }
+                        result.push(getSignatureFromDeclaration(node));
+                }
+            }
+            return result;
+        }
+        function resolveExternalModuleTypeByLiteral(name) {
+            var moduleSym = resolveExternalModuleName(name, name);
+            if (moduleSym) {
+                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
+                if (resolvedModuleSymbol) {
+                    return getTypeOfSymbol(resolvedModuleSymbol);
+                }
+            }
+            return anyType;
+        }
+        function getReturnTypeOfSignature(signature) {
+            if (!signature.resolvedReturnType) {
+                if (!pushTypeResolution(signature, 3)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                if (signature.target) {
+                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
+                }
+                else if (signature.unionSignatures) {
+                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature));
+                }
+                else {
+                    type = getReturnTypeFromBody(signature.declaration);
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (compilerOptions.noImplicitAny) {
+                        var declaration = signature.declaration;
+                        if (declaration.name) {
+                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
+                        }
+                    }
+                }
+                signature.resolvedReturnType = type;
+            }
+            return signature.resolvedReturnType;
+        }
+        function getRestTypeOfSignature(signature) {
+            if (signature.hasRestParameter) {
+                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
+                if (type.flags & 4096 && type.target === globalArrayType) {
+                    return type.typeArguments[0];
+                }
+            }
+            return anyType;
+        }
+        function getSignatureInstantiation(signature, typeArguments) {
+            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), true);
+        }
+        function getErasedSignature(signature) {
+            if (!signature.typeParameters)
+                return signature;
+            if (!signature.erasedSignatureCache) {
+                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), true);
+            }
+            return signature.erasedSignatureCache;
+        }
+        function getOrCreateTypeFromSignature(signature) {
+            if (!signature.isolatedSignatureType) {
+                var isConstructor = signature.declaration.kind === 148 || signature.declaration.kind === 152;
+                var type = createObjectType(65536 | 262144);
+                type.members = emptySymbols;
+                type.properties = emptyArray;
+                type.callSignatures = !isConstructor ? [signature] : emptyArray;
+                type.constructSignatures = isConstructor ? [signature] : emptyArray;
+                signature.isolatedSignatureType = type;
+            }
+            return signature.isolatedSignatureType;
+        }
+        function getIndexSymbol(symbol) {
+            return symbol.members["__index"];
+        }
+        function getIndexDeclarationOfSymbol(symbol, kind) {
+            var syntaxKind = kind === 1 ? 130 : 132;
+            var indexSymbol = getIndexSymbol(symbol);
+            if (indexSymbol) {
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var node = decl;
+                    if (node.parameters.length === 1) {
+                        var parameter = node.parameters[0];
+                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
+                            return node;
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function createIndexInfo(type, isReadonly, declaration) {
+            return { type: type, isReadonly: isReadonly, declaration: declaration };
+        }
+        function getIndexInfoOfSymbol(symbol, kind) {
+            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
+            if (declaration) {
+                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (declaration.flags & 64) !== 0, declaration);
+            }
+            return undefined;
+        }
+        function getConstraintDeclaration(type) {
+            return ts.getDeclarationOfKind(type.symbol, 141).constraint;
+        }
+        function hasConstraintReferenceTo(type, target) {
+            var checked;
+            while (type && !(type.flags & 33554432) && type.flags & 512 && !ts.contains(checked, type)) {
+                if (type === target) {
+                    return true;
+                }
+                (checked || (checked = [])).push(type);
+                var constraintDeclaration = getConstraintDeclaration(type);
+                type = constraintDeclaration && getTypeFromTypeNode(constraintDeclaration);
+            }
+            return false;
+        }
+        function getConstraintOfTypeParameter(typeParameter) {
+            if (!typeParameter.constraint) {
+                if (typeParameter.target) {
+                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
+                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
+                }
+                else {
+                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
+                    var constraint = getTypeFromTypeNode(constraintDeclaration);
+                    if (hasConstraintReferenceTo(constraint, typeParameter)) {
+                        error(constraintDeclaration, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
+                        constraint = unknownType;
+                    }
+                    typeParameter.constraint = constraint;
+                }
+            }
+            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
+        }
+        function getParentSymbolOfTypeParameter(typeParameter) {
+            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 141).parent);
+        }
+        function getTypeListId(types) {
+            if (types) {
+                switch (types.length) {
+                    case 1:
+                        return "" + types[0].id;
+                    case 2:
+                        return types[0].id + "," + types[1].id;
+                    default:
+                        var result = "";
+                        for (var i = 0; i < types.length; i++) {
+                            if (i > 0) {
+                                result += ",";
+                            }
+                            result += types[i].id;
+                        }
+                        return result;
+                }
+            }
+            return "";
+        }
+        function getPropagatingFlagsOfTypes(types, excludeKinds) {
+            var result = 0;
+            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
+                var type = types_3[_i];
+                if (!(type.flags & excludeKinds)) {
+                    result |= type.flags;
+                }
+            }
+            return result & 14680064;
+        }
+        function createTypeReference(target, typeArguments) {
+            var id = getTypeListId(typeArguments);
+            var type = target.instantiations[id];
+            if (!type) {
+                var propagatedFlags = typeArguments ? getPropagatingFlagsOfTypes(typeArguments, 0) : 0;
+                var flags = 4096 | propagatedFlags;
+                type = target.instantiations[id] = createObjectType(flags, target.symbol);
+                type.target = target;
+                type.typeArguments = typeArguments;
+            }
+            return type;
+        }
+        function getTypeFromClassOrInterfaceReference(node, symbol) {
+            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
+            var typeParameters = type.localTypeParameters;
+            if (typeParameters) {
+                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
+                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, typeToString(type, undefined, 1), typeParameters.length);
+                    return unknownType;
+                }
+                return createTypeReference(type, ts.concatenate(type.outerTypeParameters, ts.map(node.typeArguments, getTypeFromTypeNode)));
+            }
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
+                return unknownType;
+            }
+            return type;
+        }
+        function getTypeFromTypeAliasReference(node, symbol) {
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var links = getSymbolLinks(symbol);
+            var typeParameters = links.typeParameters;
+            if (typeParameters) {
+                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
+                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, symbolToString(symbol), typeParameters.length);
+                    return unknownType;
+                }
+                var typeArguments = ts.map(node.typeArguments, getTypeFromTypeNode);
+                var id = getTypeListId(typeArguments);
+                return links.instantiations[id] || (links.instantiations[id] = instantiateType(type, createTypeMapper(typeParameters, typeArguments)));
+            }
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return type;
+        }
+        function getTypeFromNonGenericTypeReference(node, symbol) {
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return getDeclaredTypeOfSymbol(symbol);
+        }
+        function getTypeReferenceName(node) {
+            switch (node.kind) {
+                case 155:
+                    return node.typeName;
+                case 267:
+                    return node.name;
+                case 194:
+                    if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                        return node.expression;
+                    }
+            }
+            return undefined;
+        }
+        function resolveTypeReferenceName(node, typeReferenceName) {
+            if (!typeReferenceName) {
+                return unknownSymbol;
+            }
+            return resolveEntityName(typeReferenceName, 793056) || unknownSymbol;
+        }
+        function getTypeReferenceType(node, symbol) {
+            if (symbol === unknownSymbol) {
+                return unknownType;
+            }
+            if (symbol.flags & (32 | 64)) {
+                return getTypeFromClassOrInterfaceReference(node, symbol);
+            }
+            if (symbol.flags & 524288) {
+                return getTypeFromTypeAliasReference(node, symbol);
+            }
+            if (symbol.flags & 107455 && node.kind === 267) {
+                return getTypeOfSymbol(symbol);
+            }
+            return getTypeFromNonGenericTypeReference(node, symbol);
+        }
+        function getTypeFromTypeReference(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var symbol = void 0;
+                var type = void 0;
+                if (node.kind === 267) {
+                    var typeReferenceName = getTypeReferenceName(node);
+                    symbol = resolveTypeReferenceName(node, typeReferenceName);
+                    type = getTypeReferenceType(node, symbol);
+                    links.resolvedSymbol = symbol;
+                    links.resolvedType = type;
+                }
+                else {
+                    var typeNameOrExpression = node.kind === 155 ? node.typeName :
+                        ts.isSupportedExpressionWithTypeArguments(node) ? node.expression :
+                            undefined;
+                    symbol = typeNameOrExpression && resolveEntityName(typeNameOrExpression, 793056) || unknownSymbol;
+                    type = symbol === unknownSymbol ? unknownType :
+                        symbol.flags & (32 | 64) ? getTypeFromClassOrInterfaceReference(node, symbol) :
+                            symbol.flags & 524288 ? getTypeFromTypeAliasReference(node, symbol) :
+                                getTypeFromNonGenericTypeReference(node, symbol);
+                }
+                links.resolvedSymbol = symbol;
+                links.resolvedType = type;
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeQueryNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getWidenedType(checkExpression(node.exprName));
+            }
+            return links.resolvedType;
+        }
+        function getTypeOfGlobalSymbol(symbol, arity) {
+            function getTypeDeclaration(symbol) {
+                var declarations = symbol.declarations;
+                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
+                    var declaration = declarations_3[_i];
+                    switch (declaration.kind) {
+                        case 221:
+                        case 222:
+                        case 224:
+                            return declaration;
+                    }
+                }
+            }
+            if (!symbol) {
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            var type = getDeclaredTypeOfSymbol(symbol);
+            if (!(type.flags & 80896)) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            if ((type.typeParameters ? type.typeParameters.length : 0) !== arity) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            return type;
+        }
+        function getGlobalValueSymbol(name) {
+            return getGlobalSymbol(name, 107455, ts.Diagnostics.Cannot_find_global_value_0);
+        }
+        function getGlobalTypeSymbol(name) {
+            return getGlobalSymbol(name, 793056, ts.Diagnostics.Cannot_find_global_type_0);
+        }
+        function getGlobalSymbol(name, meaning, diagnostic) {
+            return resolveName(undefined, name, meaning, diagnostic, name);
+        }
+        function getGlobalType(name, arity) {
+            if (arity === void 0) { arity = 0; }
+            return getTypeOfGlobalSymbol(getGlobalTypeSymbol(name), arity);
+        }
+        function getExportedTypeFromNamespace(namespace, name) {
+            var namespaceSymbol = getGlobalSymbol(namespace, 1536, undefined);
+            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793056);
+            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
+        }
+        function createTypedPropertyDescriptorType(propertyType) {
+            var globalTypedPropertyDescriptorType = getGlobalTypedPropertyDescriptorType();
+            return globalTypedPropertyDescriptorType !== emptyGenericType
+                ? createTypeReference(globalTypedPropertyDescriptorType, [propertyType])
+                : emptyObjectType;
+        }
+        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
+            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
+        }
+        function createIterableType(elementType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableType(), [elementType]);
+        }
+        function createIterableIteratorType(elementType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(), [elementType]);
+        }
+        function createArrayType(elementType) {
+            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
+        }
+        function getTypeFromArrayTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
+            }
+            return links.resolvedType;
+        }
+        function createTupleType(elementTypes) {
+            var id = getTypeListId(elementTypes);
+            return tupleTypes[id] || (tupleTypes[id] = createNewTupleType(elementTypes));
+        }
+        function createNewTupleType(elementTypes) {
+            var propagatedFlags = getPropagatingFlagsOfTypes(elementTypes, 0);
+            var type = createObjectType(8192 | propagatedFlags);
+            type.elementTypes = elementTypes;
+            return type;
+        }
+        function getTypeFromTupleTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNode));
+            }
+            return links.resolvedType;
+        }
+        function addTypeToSet(typeSet, type, typeSetKind) {
+            if (type.flags & typeSetKind) {
+                addTypesToSet(typeSet, type.types, typeSetKind);
+            }
+            else if (type.flags & (1 | 32 | 64)) {
+                if (type.flags & 1)
+                    typeSet.containsAny = true;
+                if (type.flags & 32)
+                    typeSet.containsUndefined = true;
+                if (type.flags & 64)
+                    typeSet.containsNull = true;
+                if (!(type.flags & 2097152))
+                    typeSet.containsNonWideningType = true;
+            }
+            else if (type !== neverType && !ts.contains(typeSet, type)) {
+                typeSet.push(type);
+            }
+        }
+        function addTypesToSet(typeSet, types, typeSetKind) {
+            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
+                var type = types_4[_i];
+                addTypeToSet(typeSet, type, typeSetKind);
+            }
+        }
+        function isSubtypeOfAny(candidate, types) {
+            for (var i = 0, len = types.length; i < len; i++) {
+                if (candidate !== types[i] && isTypeSubtypeOf(candidate, types[i])) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function removeSubtypes(types) {
+            var i = types.length;
+            while (i > 0) {
+                i--;
+                if (isSubtypeOfAny(types[i], types)) {
+                    types.splice(i, 1);
+                }
+            }
+        }
+        function getUnionType(types, noSubtypeReduction) {
+            if (types.length === 0) {
+                return neverType;
+            }
+            if (types.length === 1) {
+                return types[0];
+            }
+            var typeSet = [];
+            addTypesToSet(typeSet, types, 16384);
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (strictNullChecks) {
+                if (typeSet.containsNull)
+                    typeSet.push(nullType);
+                if (typeSet.containsUndefined)
+                    typeSet.push(undefinedType);
+            }
+            if (!noSubtypeReduction) {
+                removeSubtypes(typeSet);
+            }
+            if (typeSet.length === 0) {
+                return typeSet.containsNull ? typeSet.containsNonWideningType ? nullType : nullWideningType :
+                    typeSet.containsUndefined ? typeSet.containsNonWideningType ? undefinedType : undefinedWideningType :
+                        neverType;
+            }
+            else if (typeSet.length === 1) {
+                return typeSet[0];
+            }
+            var id = getTypeListId(typeSet);
+            var type = unionTypes[id];
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, 96);
+                type = unionTypes[id] = createObjectType(16384 | propagatedFlags);
+                type.types = typeSet;
+            }
+            return type;
+        }
+        function getTypeFromUnionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), true);
+            }
+            return links.resolvedType;
+        }
+        function getIntersectionType(types) {
+            if (types.length === 0) {
+                return emptyObjectType;
+            }
+            var typeSet = [];
+            addTypesToSet(typeSet, types, 32768);
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (strictNullChecks) {
+                if (typeSet.containsNull)
+                    typeSet.push(nullType);
+                if (typeSet.containsUndefined)
+                    typeSet.push(undefinedType);
+            }
+            if (typeSet.length === 1) {
+                return typeSet[0];
+            }
+            var id = getTypeListId(typeSet);
+            var type = intersectionTypes[id];
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, 96);
+                type = intersectionTypes[id] = createObjectType(32768 | propagatedFlags);
+                type.types = typeSet;
+            }
+            return type;
+        }
+        function getTypeFromIntersectionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNode));
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createObjectType(65536, node.symbol);
+            }
+            return links.resolvedType;
+        }
+        function getStringLiteralTypeForText(text) {
+            if (ts.hasProperty(stringLiteralTypes, text)) {
+                return stringLiteralTypes[text];
+            }
+            var type = stringLiteralTypes[text] = createType(256);
+            type.text = text;
+            return type;
+        }
+        function getTypeFromStringLiteralTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getStringLiteralTypeForText(ts.unescapeIdentifier(node.text));
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocVariadicType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var type = getTypeFromTypeNode(node.type);
+                links.resolvedType = type ? createArrayType(type) : unknownType;
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocTupleType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var types = ts.map(node.types, getTypeFromTypeNode);
+                links.resolvedType = createTupleType(types);
+            }
+            return links.resolvedType;
+        }
+        function getThisType(node) {
+            var container = ts.getThisContainer(node, false);
+            var parent = container && container.parent;
+            if (parent && (ts.isClassLike(parent) || parent.kind === 222)) {
+                if (!(container.flags & 32) &&
+                    (container.kind !== 148 || ts.isNodeDescendentOf(node, container.body))) {
+                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
+                }
+            }
+            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
+            return unknownType;
+        }
+        function getTypeFromThisTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getThisType(node);
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeNode(node) {
+            switch (node.kind) {
+                case 117:
+                case 258:
+                case 259:
+                    return anyType;
+                case 132:
+                    return stringType;
+                case 130:
+                    return numberType;
+                case 120:
+                    return booleanType;
+                case 133:
+                    return esSymbolType;
+                case 103:
+                    return voidType;
+                case 135:
+                    return undefinedType;
+                case 93:
+                    return nullType;
+                case 127:
+                    return neverType;
+                case 165:
+                case 97:
+                    return getTypeFromThisTypeNode(node);
+                case 166:
+                    return getTypeFromStringLiteralTypeNode(node);
+                case 155:
+                case 267:
+                    return getTypeFromTypeReference(node);
+                case 154:
+                    return booleanType;
+                case 194:
+                    return getTypeFromTypeReference(node);
+                case 158:
+                    return getTypeFromTypeQueryNode(node);
+                case 160:
+                case 260:
+                    return getTypeFromArrayTypeNode(node);
+                case 161:
+                    return getTypeFromTupleTypeNode(node);
+                case 162:
+                case 261:
+                    return getTypeFromUnionTypeNode(node);
+                case 163:
+                    return getTypeFromIntersectionTypeNode(node);
+                case 164:
+                case 263:
+                case 264:
+                case 271:
+                case 272:
+                case 268:
+                    return getTypeFromTypeNode(node.type);
+                case 156:
+                case 157:
+                case 159:
+                case 281:
+                case 269:
+                case 265:
+                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                case 69:
+                case 139:
+                    var symbol = getSymbolAtLocation(node);
+                    return symbol && getDeclaredTypeOfSymbol(symbol);
+                case 262:
+                    return getTypeFromJSDocTupleType(node);
+                case 270:
+                    return getTypeFromJSDocVariadicType(node);
+                default:
+                    return unknownType;
+            }
+        }
+        function instantiateList(items, mapper, instantiator) {
+            if (items && items.length) {
+                var result = [];
+                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
+                    var v = items_1[_i];
+                    result.push(instantiator(v, mapper));
+                }
+                return result;
+            }
+            return items;
+        }
+        function createUnaryTypeMapper(source, target) {
+            return function (t) { return t === source ? target : t; };
+        }
+        function createBinaryTypeMapper(source1, target1, source2, target2) {
+            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
+        }
+        function createArrayTypeMapper(sources, targets) {
+            return function (t) {
+                for (var i = 0; i < sources.length; i++) {
+                    if (t === sources[i]) {
+                        return targets ? targets[i] : anyType;
+                    }
+                }
+                return t;
+            };
+        }
+        function createTypeMapper(sources, targets) {
+            var count = sources.length;
+            var mapper = count == 1 ? createUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
+                count == 2 ? createBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
+                    createArrayTypeMapper(sources, targets);
+            mapper.mappedTypes = sources;
+            return mapper;
+        }
+        function createTypeEraser(sources) {
+            return createTypeMapper(sources, undefined);
+        }
+        function getInferenceMapper(context) {
+            if (!context.mapper) {
+                var mapper = function (t) {
+                    var typeParameters = context.typeParameters;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (t === typeParameters[i]) {
+                            context.inferences[i].isFixed = true;
+                            return getInferredType(context, i);
+                        }
+                    }
+                    return t;
+                };
+                mapper.mappedTypes = context.typeParameters;
+                mapper.context = context;
+                context.mapper = mapper;
+            }
+            return context.mapper;
+        }
+        function identityMapper(type) {
+            return type;
+        }
+        function combineTypeMappers(mapper1, mapper2) {
+            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
+            mapper.mappedTypes = mapper1.mappedTypes;
+            return mapper;
+        }
+        function cloneTypeParameter(typeParameter) {
+            var result = createType(512);
+            result.symbol = typeParameter.symbol;
+            result.target = typeParameter;
+            return result;
+        }
+        function cloneTypePredicate(predicate, mapper) {
+            if (ts.isIdentifierTypePredicate(predicate)) {
+                return {
+                    kind: 1,
+                    parameterName: predicate.parameterName,
+                    parameterIndex: predicate.parameterIndex,
+                    type: instantiateType(predicate.type, mapper)
+                };
+            }
+            else {
+                return {
+                    kind: 0,
+                    type: instantiateType(predicate.type, mapper)
+                };
+            }
+        }
+        function instantiateSignature(signature, mapper, eraseTypeParameters) {
+            var freshTypeParameters;
+            var freshTypePredicate;
+            if (signature.typeParameters && !eraseTypeParameters) {
+                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
+                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
+                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
+                    var tp = freshTypeParameters_1[_i];
+                    tp.mapper = mapper;
+                }
+            }
+            if (signature.typePredicate) {
+                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
+            }
+            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisType && instantiateType(signature.thisType, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), instantiateType(signature.resolvedReturnType, mapper), freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasStringLiterals);
+            result.target = signature;
+            result.mapper = mapper;
+            return result;
+        }
+        function instantiateSymbol(symbol, mapper) {
+            if (symbol.flags & 16777216) {
+                var links = getSymbolLinks(symbol);
+                symbol = links.target;
+                mapper = combineTypeMappers(links.mapper, mapper);
+            }
+            var result = createSymbol(16777216 | 67108864 | symbol.flags, symbol.name);
+            result.declarations = symbol.declarations;
+            result.parent = symbol.parent;
+            result.target = symbol;
+            result.mapper = mapper;
+            if (symbol.valueDeclaration) {
+                result.valueDeclaration = symbol.valueDeclaration;
+            }
+            return result;
+        }
+        function instantiateAnonymousType(type, mapper) {
+            if (mapper.instantiations) {
+                var cachedType = mapper.instantiations[type.id];
+                if (cachedType) {
+                    return cachedType;
+                }
+            }
+            else {
+                mapper.instantiations = [];
+            }
+            var result = createObjectType(65536 | 131072, type.symbol);
+            result.target = type;
+            result.mapper = mapper;
+            mapper.instantiations[type.id] = result;
+            return result;
+        }
+        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
+            var mappedTypes = mapper.mappedTypes;
+            var node = symbol.declarations[0].parent;
+            while (node) {
+                switch (node.kind) {
+                    case 156:
+                    case 157:
+                    case 220:
+                    case 147:
+                    case 146:
+                    case 148:
+                    case 151:
+                    case 152:
+                    case 153:
+                    case 149:
+                    case 150:
+                    case 179:
+                    case 180:
+                    case 221:
+                    case 192:
+                    case 222:
+                    case 223:
+                        var declaration = node;
+                        if (declaration.typeParameters) {
+                            for (var _i = 0, _a = declaration.typeParameters; _i < _a.length; _i++) {
+                                var d = _a[_i];
+                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
+                                    return true;
+                                }
+                            }
+                        }
+                        if (ts.isClassLike(node) || node.kind === 222) {
+                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
+                            if (thisType && ts.contains(mappedTypes, thisType)) {
+                                return true;
+                            }
+                        }
+                        break;
+                    case 225:
+                    case 256:
+                        return false;
+                }
+                node = node.parent;
+            }
+            return false;
+        }
+        function instantiateType(type, mapper) {
+            if (type && mapper !== identityMapper) {
+                if (type.flags & 512) {
+                    return mapper(type);
+                }
+                if (type.flags & 65536) {
+                    return type.symbol &&
+                        type.symbol.flags & (16 | 8192 | 32 | 2048 | 4096) &&
+                        (type.flags & 131072 || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
+                        instantiateAnonymousType(type, mapper) : type;
+                }
+                if (type.flags & 4096) {
+                    return createTypeReference(type.target, instantiateList(type.typeArguments, mapper, instantiateType));
+                }
+                if (type.flags & 8192) {
+                    return createTupleType(instantiateList(type.elementTypes, mapper, instantiateType));
+                }
+                if (type.flags & 16384) {
+                    return getUnionType(instantiateList(type.types, mapper, instantiateType), true);
+                }
+                if (type.flags & 32768) {
+                    return getIntersectionType(instantiateList(type.types, mapper, instantiateType));
+                }
+            }
+            return type;
+        }
+        function instantiateIndexInfo(info, mapper) {
+            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
+        }
+        function isContextSensitive(node) {
+            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
+            switch (node.kind) {
+                case 179:
+                case 180:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 171:
+                    return ts.forEach(node.properties, isContextSensitive);
+                case 170:
+                    return ts.forEach(node.elements, isContextSensitive);
+                case 188:
+                    return isContextSensitive(node.whenTrue) ||
+                        isContextSensitive(node.whenFalse);
+                case 187:
+                    return node.operatorToken.kind === 52 &&
+                        (isContextSensitive(node.left) || isContextSensitive(node.right));
+                case 253:
+                    return isContextSensitive(node.initializer);
+                case 147:
+                case 146:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 178:
+                    return isContextSensitive(node.expression);
+            }
+            return false;
+        }
+        function isContextSensitiveFunctionLikeDeclaration(node) {
+            var areAllParametersUntyped = !ts.forEach(node.parameters, function (p) { return p.type; });
+            var isNullaryArrow = node.kind === 180 && !node.parameters.length;
+            return !node.typeParameters && areAllParametersUntyped && !isNullaryArrow;
+        }
+        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
+            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
+        }
+        function getTypeWithoutSignatures(type) {
+            if (type.flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.constructSignatures.length) {
+                    var result = createObjectType(65536, type.symbol);
+                    result.members = resolved.members;
+                    result.properties = resolved.properties;
+                    result.callSignatures = emptyArray;
+                    result.constructSignatures = emptyArray;
+                    type = result;
+                }
+            }
+            return type;
+        }
+        function isTypeIdenticalTo(source, target) {
+            return checkTypeRelatedTo(source, target, identityRelation, undefined);
+        }
+        function compareTypesIdentical(source, target) {
+            return checkTypeRelatedTo(source, target, identityRelation, undefined) ? -1 : 0;
+        }
+        function compareTypesAssignable(source, target) {
+            return checkTypeRelatedTo(source, target, assignableRelation, undefined) ? -1 : 0;
+        }
+        function isTypeSubtypeOf(source, target) {
+            return checkTypeSubtypeOf(source, target, undefined);
+        }
+        function isTypeAssignableTo(source, target) {
+            return checkTypeAssignableTo(source, target, undefined);
+        }
+        function isTypeComparableTo(source, target) {
+            return checkTypeComparableTo(source, target, undefined);
+        }
+        function checkTypeSubtypeOf(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
+            return compareSignaturesRelated(source, target, ignoreReturnTypes, false, undefined, compareTypesAssignable) !== 0;
+        }
+        function compareSignaturesRelated(source, target, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
+            if (source === target) {
+                return -1;
+            }
+            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
+                return 0;
+            }
+            source = getErasedSignature(source);
+            target = getErasedSignature(target);
+            var result = -1;
+            if (source.thisType && target.thisType && source.thisType !== voidType) {
+                var related = compareTypes(source.thisType, target.thisType, false)
+                    || compareTypes(target.thisType, source.thisType, reportErrors);
+                if (!related) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
+                    }
+                    return 0;
+                }
+                result &= related;
+            }
+            var sourceMax = getNumNonRestParameters(source);
+            var targetMax = getNumNonRestParameters(target);
+            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
+            var sourceParams = source.parameters;
+            var targetParams = target.parameters;
+            for (var i = 0; i < checkCount; i++) {
+                var s = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
+                var t = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
+                var related = compareTypes(s, t, false) || compareTypes(t, s, reportErrors);
+                if (!related) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
+                    }
+                    return 0;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                var targetReturnType = getReturnTypeOfSignature(target);
+                if (targetReturnType === voidType) {
+                    return result;
+                }
+                var sourceReturnType = getReturnTypeOfSignature(source);
+                if (target.typePredicate) {
+                    if (source.typePredicate) {
+                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
+                    }
+                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
+                        if (reportErrors) {
+                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
+                        }
+                        return 0;
+                    }
+                }
+                else {
+                    result &= compareTypes(sourceReturnType, targetReturnType, reportErrors);
+                }
+            }
+            return result;
+        }
+        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
+            if (source.kind !== target.kind) {
+                if (reportErrors) {
+                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
+                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                }
+                return 0;
+            }
+            if (source.kind === 1) {
+                var sourceIdentifierPredicate = source;
+                var targetIdentifierPredicate = target;
+                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
+                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                    }
+                    return 0;
+                }
+            }
+            var related = compareTypes(source.type, target.type, reportErrors);
+            if (related === 0 && reportErrors) {
+                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+            }
+            return related;
+        }
+        function isImplementationCompatibleWithOverload(implementation, overload) {
+            var erasedSource = getErasedSignature(implementation);
+            var erasedTarget = getErasedSignature(overload);
+            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
+            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
+            if (targetReturnType === voidType
+                || checkTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation, undefined)
+                || checkTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation, undefined)) {
+                return isSignatureAssignableTo(erasedSource, erasedTarget, true);
+            }
+            return false;
+        }
+        function getNumNonRestParameters(signature) {
+            var numParams = signature.parameters.length;
+            return signature.hasRestParameter ?
+                numParams - 1 :
+                numParams;
+        }
+        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
+            if (source.hasRestParameter === target.hasRestParameter) {
+                if (source.hasRestParameter) {
+                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
+                }
+                else {
+                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
+                }
+            }
+            else {
+                return source.hasRestParameter ?
+                    targetNonRestParamCount :
+                    sourceNonRestParamCount;
+            }
+        }
+        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
+            var errorInfo;
+            var sourceStack;
+            var targetStack;
+            var maybeStack;
+            var expandingFlags;
+            var depth = 0;
+            var overflow = false;
+            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
+            var result = isRelatedTo(source, target, !!errorNode, headMessage);
+            if (overflow) {
+                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
+            }
+            else if (errorInfo) {
+                if (containingMessageChain) {
+                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
+                }
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
+            }
+            return result !== 0;
+            function reportError(message, arg0, arg1, arg2) {
+                ts.Debug.assert(!!errorNode);
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+            }
+            function reportRelationError(message, source, target) {
+                var sourceType = typeToString(source);
+                var targetType = typeToString(target);
+                if (sourceType === targetType) {
+                    sourceType = typeToString(source, undefined, 128);
+                    targetType = typeToString(target, undefined, 128);
+                }
+                if (!message) {
+                    message = relation === comparableRelation ?
+                        ts.Diagnostics.Type_0_is_not_comparable_to_type_1 :
+                        ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
+                }
+                reportError(message, sourceType, targetType);
+            }
+            function isRelatedTo(source, target, reportErrors, headMessage) {
+                var result;
+                if (source === target)
+                    return -1;
+                if (relation === identityRelation) {
+                    return isIdenticalTo(source, target);
+                }
+                if (!(target.flags & 134217728)) {
+                    if (target.flags & 1 || source.flags & 134217728)
+                        return -1;
+                    if (source.flags & 32) {
+                        if (!strictNullChecks || target.flags & (32 | 16))
+                            return -1;
+                    }
+                    if (source.flags & 64) {
+                        if (!strictNullChecks || target.flags & 64)
+                            return -1;
+                    }
+                    if (source.flags & 128 && target === numberType)
+                        return -1;
+                    if (source.flags & 128 && target.flags & 128) {
+                        if (result = enumRelatedTo(source, target, reportErrors)) {
+                            return result;
+                        }
+                    }
+                    if (source.flags & 256 && target === stringType)
+                        return -1;
+                    if (relation === assignableRelation || relation === comparableRelation) {
+                        if (source.flags & 1)
+                            return -1;
+                        if (source === numberType && target.flags & 128)
+                            return -1;
+                    }
+                    if (source.flags & 8 && target.flags & 8) {
+                        return -1;
+                    }
+                }
+                if (source.flags & 1048576) {
+                    if (hasExcessProperties(source, target, reportErrors)) {
+                        if (reportErrors) {
+                            reportRelationError(headMessage, source, target);
+                        }
+                        return 0;
+                    }
+                    if (target.flags & 49152) {
+                        source = getRegularTypeOfObjectLiteral(source);
+                    }
+                }
+                var saveErrorInfo = errorInfo;
+                if (source.flags & 16384) {
+                    if (relation === comparableRelation) {
+                        result = someTypeRelatedToType(source, target, reportErrors);
+                    }
+                    else {
+                        result = eachTypeRelatedToType(source, target, reportErrors);
+                    }
+                    if (result) {
+                        return result;
+                    }
+                }
+                else if (target.flags & 32768) {
+                    result = typeRelatedToEachType(source, target, reportErrors);
+                    if (result) {
+                        return result;
+                    }
+                }
+                else {
+                    if (source.flags & 32768) {
+                        if (result = someTypeRelatedToType(source, target, false)) {
+                            return result;
+                        }
+                    }
+                    if (target.flags & 16384) {
+                        if (result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 16777726))) {
+                            return result;
+                        }
+                    }
+                }
+                if (source.flags & 512) {
+                    var constraint = getConstraintOfTypeParameter(source);
+                    if (!constraint || constraint.flags & 1) {
+                        constraint = emptyObjectType;
+                    }
+                    constraint = getTypeWithThisArgument(constraint, source);
+                    var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
+                    if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
+                        errorInfo = saveErrorInfo;
+                        return result;
+                    }
+                }
+                else {
+                    if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
+                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
+                            return result;
+                        }
+                    }
+                    var apparentSource = getApparentType(source);
+                    if (apparentSource.flags & (80896 | 32768) && target.flags & 80896) {
+                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !(source.flags & 16777726);
+                        if (result = objectTypeRelatedTo(apparentSource, source, target, reportStructuralErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
+                    }
+                }
+                if (reportErrors) {
+                    reportRelationError(headMessage, source, target);
+                }
+                return 0;
+            }
+            function isIdenticalTo(source, target) {
+                var result;
+                if (source.flags & 80896 && target.flags & 80896) {
+                    if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
+                        if (result = typeArgumentsRelatedTo(source, target, false)) {
+                            return result;
+                        }
+                    }
+                    return objectTypeRelatedTo(source, source, target, false);
+                }
+                if (source.flags & 16384 && target.flags & 16384 ||
+                    source.flags & 32768 && target.flags & 32768) {
+                    if (result = eachTypeRelatedToSomeType(source, target, false)) {
+                        if (result &= eachTypeRelatedToSomeType(target, source, false)) {
+                            return result;
+                        }
+                    }
+                }
+                return 0;
+            }
+            function isKnownProperty(type, name) {
+                if (type.flags & 80896) {
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if ((relation === assignableRelation || relation === comparableRelation) && (type === globalObjectType || isEmptyObjectType(resolved)) ||
+                        resolved.stringIndexInfo ||
+                        (resolved.numberIndexInfo && isNumericLiteralName(name)) ||
+                        getPropertyOfType(type, name)) {
+                        return true;
+                    }
+                }
+                else if (type.flags & 49152) {
+                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                        var t = _a[_i];
+                        if (isKnownProperty(t, name)) {
+                            return true;
+                        }
+                    }
+                }
+                return false;
+            }
+            function isEmptyObjectType(t) {
+                return t.properties.length === 0 &&
+                    t.callSignatures.length === 0 &&
+                    t.constructSignatures.length === 0 &&
+                    !t.stringIndexInfo &&
+                    !t.numberIndexInfo;
+            }
+            function hasExcessProperties(source, target, reportErrors) {
+                if (!(target.flags & 67108864) && maybeTypeOfKind(target, 80896)) {
+                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                        var prop = _a[_i];
+                        if (!isKnownProperty(target, prop.name)) {
+                            if (reportErrors) {
+                                ts.Debug.assert(!!errorNode);
+                                errorNode = prop.valueDeclaration;
+                                reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
+                            }
+                            return true;
+                        }
+                    }
+                }
+                return false;
+            }
+            function eachTypeRelatedToSomeType(source, target, reportErrors) {
+                var result = -1;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
+                    var sourceType = sourceTypes_1[_i];
+                    var related = typeRelatedToSomeType(sourceType, target, false);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeRelatedToSomeType(source, target, reportErrors) {
+                var targetTypes = target.types;
+                var len = targetTypes.length;
+                while (len >= 2 && targetTypes[len - 1].flags & 96) {
+                    var related = isRelatedTo(source, targetTypes[len - 1], false);
+                    if (related) {
+                        return related;
+                    }
+                    len--;
+                }
+                for (var i = 0; i < len; i++) {
+                    var related = isRelatedTo(source, targetTypes[i], reportErrors && i === len - 1);
+                    if (related) {
+                        return related;
+                    }
+                }
+                return 0;
+            }
+            function typeRelatedToEachType(source, target, reportErrors) {
+                var result = -1;
+                var targetTypes = target.types;
+                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
+                    var targetType = targetTypes_1[_i];
+                    var related = isRelatedTo(source, targetType, reportErrors);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function someTypeRelatedToType(source, target, reportErrors) {
+                var sourceTypes = source.types;
+                var len = sourceTypes.length;
+                while (len >= 2 && sourceTypes[len - 1].flags & 96) {
+                    var related = isRelatedTo(sourceTypes[len - 1], target, false);
+                    if (related) {
+                        return related;
+                    }
+                    len--;
+                }
+                for (var i = 0; i < len; i++) {
+                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
+                    if (related) {
+                        return related;
+                    }
+                }
+                return 0;
+            }
+            function eachTypeRelatedToType(source, target, reportErrors) {
+                var result = -1;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
+                    var sourceType = sourceTypes_2[_i];
+                    var related = isRelatedTo(sourceType, target, reportErrors);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeArgumentsRelatedTo(source, target, reportErrors) {
+                var sources = source.typeArguments || emptyArray;
+                var targets = target.typeArguments || emptyArray;
+                if (sources.length !== targets.length && relation === identityRelation) {
+                    return 0;
+                }
+                var length = sources.length <= targets.length ? sources.length : targets.length;
+                var result = -1;
+                for (var i = 0; i < length; i++) {
+                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function objectTypeRelatedTo(source, originalSource, target, reportErrors) {
+                if (overflow) {
+                    return 0;
+                }
+                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
+                var related = relation[id];
+                if (related !== undefined) {
+                    if (reportErrors && related === 2) {
+                        relation[id] = 3;
+                    }
+                    else {
+                        return related === 1 ? -1 : 0;
+                    }
+                }
+                if (depth > 0) {
+                    for (var i = 0; i < depth; i++) {
+                        if (maybeStack[i][id]) {
+                            return 1;
+                        }
+                    }
+                    if (depth === 100) {
+                        overflow = true;
+                        return 0;
+                    }
+                }
+                else {
+                    sourceStack = [];
+                    targetStack = [];
+                    maybeStack = [];
+                    expandingFlags = 0;
+                }
+                sourceStack[depth] = source;
+                targetStack[depth] = target;
+                maybeStack[depth] = {};
+                maybeStack[depth][id] = 1;
+                depth++;
+                var saveExpandingFlags = expandingFlags;
+                if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth))
+                    expandingFlags |= 1;
+                if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth))
+                    expandingFlags |= 2;
+                var result;
+                if (expandingFlags === 3) {
+                    result = 1;
+                }
+                else {
+                    result = propertiesRelatedTo(source, target, reportErrors);
+                    if (result) {
+                        result &= signaturesRelatedTo(source, target, 0, reportErrors);
+                        if (result) {
+                            result &= signaturesRelatedTo(source, target, 1, reportErrors);
+                            if (result) {
+                                result &= indexTypesRelatedTo(source, originalSource, target, 0, reportErrors);
+                                if (result) {
+                                    result &= indexTypesRelatedTo(source, originalSource, target, 1, reportErrors);
+                                }
+                            }
+                        }
+                    }
+                }
+                expandingFlags = saveExpandingFlags;
+                depth--;
+                if (result) {
+                    var maybeCache = maybeStack[depth];
+                    var destinationCache = (result === -1 || depth === 0) ? relation : maybeStack[depth - 1];
+                    ts.copyMap(maybeCache, destinationCache);
+                }
+                else {
+                    relation[id] = reportErrors ? 3 : 2;
+                }
+                return result;
+            }
+            function propertiesRelatedTo(source, target, reportErrors) {
+                if (relation === identityRelation) {
+                    return propertiesIdenticalTo(source, target);
+                }
+                var result = -1;
+                var properties = getPropertiesOfObjectType(target);
+                var requireOptionalProperties = relation === subtypeRelation && !(source.flags & 524288);
+                for (var _i = 0, properties_1 = properties; _i < properties_1.length; _i++) {
+                    var targetProp = properties_1[_i];
+                    var sourceProp = getPropertyOfType(source, targetProp.name);
+                    if (sourceProp !== targetProp) {
+                        if (!sourceProp) {
+                            if (!(targetProp.flags & 536870912) || requireOptionalProperties) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
+                                }
+                                return 0;
+                            }
+                        }
+                        else if (!(targetProp.flags & 134217728)) {
+                            var sourcePropFlags = getDeclarationFlagsFromSymbol(sourceProp);
+                            var targetPropFlags = getDeclarationFlagsFromSymbol(targetProp);
+                            if (sourcePropFlags & 8 || targetPropFlags & 8) {
+                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
+                                    if (reportErrors) {
+                                        if (sourcePropFlags & 8 && targetPropFlags & 8) {
+                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
+                                        }
+                                        else {
+                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 ? source : target), typeToString(sourcePropFlags & 8 ? target : source));
+                                        }
+                                    }
+                                    return 0;
+                                }
+                            }
+                            else if (targetPropFlags & 16) {
+                                var sourceDeclaredInClass = sourceProp.parent && sourceProp.parent.flags & 32;
+                                var sourceClass = sourceDeclaredInClass ? getDeclaredTypeOfSymbol(getParentOfSymbol(sourceProp)) : undefined;
+                                var targetClass = getDeclaredTypeOfSymbol(getParentOfSymbol(targetProp));
+                                if (!sourceClass || !hasBaseType(sourceClass, targetClass)) {
+                                    if (reportErrors) {
+                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(sourceClass || source), typeToString(targetClass));
+                                    }
+                                    return 0;
+                                }
+                            }
+                            else if (sourcePropFlags & 16) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0;
+                            }
+                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
+                            if (!related) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
+                                }
+                                return 0;
+                            }
+                            result &= related;
+                            if (sourceProp.flags & 536870912 && !(targetProp.flags & 536870912)) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0;
+                            }
+                        }
+                    }
+                }
+                return result;
+            }
+            function propertiesIdenticalTo(source, target) {
+                if (!(source.flags & 80896 && target.flags & 80896)) {
+                    return 0;
+                }
+                var sourceProperties = getPropertiesOfObjectType(source);
+                var targetProperties = getPropertiesOfObjectType(target);
+                if (sourceProperties.length !== targetProperties.length) {
+                    return 0;
+                }
+                var result = -1;
+                for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
+                    var sourceProp = sourceProperties_1[_i];
+                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
+                    if (!targetProp) {
+                        return 0;
+                    }
+                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function signaturesRelatedTo(source, target, kind, reportErrors) {
+                if (relation === identityRelation) {
+                    return signaturesIdenticalTo(source, target, kind);
+                }
+                if (target === anyFunctionType || source === anyFunctionType) {
+                    return -1;
+                }
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (kind === 1 && sourceSignatures.length && targetSignatures.length) {
+                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
+                        if (reportErrors) {
+                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
+                        }
+                        return 0;
+                    }
+                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
+                        return 0;
+                    }
+                }
+                var result = -1;
+                var saveErrorInfo = errorInfo;
+                outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
+                    var t = targetSignatures_1[_i];
+                    var shouldElaborateErrors = reportErrors;
+                    for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
+                        var s = sourceSignatures_1[_a];
+                        var related = signatureRelatedTo(s, t, shouldElaborateErrors);
+                        if (related) {
+                            result &= related;
+                            errorInfo = saveErrorInfo;
+                            continue outer;
+                        }
+                        shouldElaborateErrors = false;
+                    }
+                    if (shouldElaborateErrors) {
+                        reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, undefined, undefined, kind));
+                    }
+                    return 0;
+                }
+                return result;
+            }
+            function signatureRelatedTo(source, target, reportErrors) {
+                return compareSignaturesRelated(source, target, false, reportErrors, reportError, isRelatedTo);
+            }
+            function signaturesIdenticalTo(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (sourceSignatures.length !== targetSignatures.length) {
+                    return 0;
+                }
+                var result = -1;
+                for (var i = 0, len = sourceSignatures.length; i < len; i++) {
+                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], false, false, false, isRelatedTo);
+                    if (!related) {
+                        return 0;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
+                var result = -1;
+                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 || isNumericLiteralName(prop.name)) {
+                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
+                        if (!related) {
+                            if (reportErrors) {
+                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
+                            }
+                            return 0;
+                        }
+                        result &= related;
+                    }
+                }
+                return result;
+            }
+            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
+                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
+                if (!related && reportErrors) {
+                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
+                }
+                return related;
+            }
+            function indexTypesRelatedTo(source, originalSource, target, kind, reportErrors) {
+                if (relation === identityRelation) {
+                    return indexTypesIdenticalTo(source, target, kind);
+                }
+                var targetInfo = getIndexInfoOfType(target, kind);
+                if (!targetInfo || ((targetInfo.type.flags & 1) && !(originalSource.flags & 16777726))) {
+                    return -1;
+                }
+                var sourceInfo = getIndexInfoOfType(source, kind) ||
+                    kind === 1 && getIndexInfoOfType(source, 0);
+                if (sourceInfo) {
+                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
+                }
+                if (isObjectLiteralType(source)) {
+                    var related = -1;
+                    if (kind === 0) {
+                        var sourceNumberInfo = getIndexInfoOfType(source, 1);
+                        if (sourceNumberInfo) {
+                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
+                        }
+                    }
+                    if (related) {
+                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
+                    }
+                    return related;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
+                }
+                return 0;
+            }
+            function indexTypesIdenticalTo(source, target, indexKind) {
+                var targetInfo = getIndexInfoOfType(target, indexKind);
+                var sourceInfo = getIndexInfoOfType(source, indexKind);
+                if (!sourceInfo && !targetInfo) {
+                    return -1;
+                }
+                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
+                    return isRelatedTo(sourceInfo.type, targetInfo.type);
+                }
+                return 0;
+            }
+            function enumRelatedTo(source, target, reportErrors) {
+                if (source.symbol.name !== target.symbol.name ||
+                    source.symbol.flags & 128 ||
+                    target.symbol.flags & 128) {
+                    return 0;
+                }
+                var targetEnumType = getTypeOfSymbol(target.symbol);
+                for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
+                    var property = _a[_i];
+                    if (property.flags & 8) {
+                        var targetProperty = getPropertyOfType(targetEnumType, property.name);
+                        if (!targetProperty || !(targetProperty.flags & 8)) {
+                            if (reportErrors) {
+                                reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, undefined, 128));
+                            }
+                            return 0;
+                        }
+                    }
+                }
+                return -1;
+            }
+            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
+                if (!sourceSignature.declaration || !targetSignature.declaration) {
+                    return true;
+                }
+                var sourceAccessibility = sourceSignature.declaration.flags & (8 | 16);
+                var targetAccessibility = targetSignature.declaration.flags & (8 | 16);
+                if (targetAccessibility === 8) {
+                    return true;
+                }
+                if (targetAccessibility === 16 && sourceAccessibility !== 8) {
+                    return true;
+                }
+                if (targetAccessibility !== 16 && !sourceAccessibility) {
+                    return true;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
+                }
+                return false;
+            }
+        }
+        function isAbstractConstructorType(type) {
+            if (type.flags & 65536) {
+                var symbol = type.symbol;
+                if (symbol && symbol.flags & 32) {
+                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
+                    if (declaration && declaration.flags & 128) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isDeeplyNestedGeneric(type, stack, depth) {
+            if (type.flags & (4096 | 131072) && depth >= 5) {
+                var symbol = type.symbol;
+                var count = 0;
+                for (var i = 0; i < depth; i++) {
+                    var t = stack[i];
+                    if (t.flags & (4096 | 131072) && t.symbol === symbol) {
+                        count++;
+                        if (count >= 5)
+                            return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isPropertyIdenticalTo(sourceProp, targetProp) {
+            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0;
+        }
+        function compareProperties(sourceProp, targetProp, compareTypes) {
+            if (sourceProp === targetProp) {
+                return -1;
+            }
+            var sourcePropAccessibility = getDeclarationFlagsFromSymbol(sourceProp) & (8 | 16);
+            var targetPropAccessibility = getDeclarationFlagsFromSymbol(targetProp) & (8 | 16);
+            if (sourcePropAccessibility !== targetPropAccessibility) {
+                return 0;
+            }
+            if (sourcePropAccessibility) {
+                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
+                    return 0;
+                }
+            }
+            else {
+                if ((sourceProp.flags & 536870912) !== (targetProp.flags & 536870912)) {
+                    return 0;
+                }
+            }
+            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
+                return 0;
+            }
+            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+        }
+        function isMatchingSignature(source, target, partialMatch) {
+            if (source.parameters.length === target.parameters.length &&
+                source.minArgumentCount === target.minArgumentCount &&
+                source.hasRestParameter === target.hasRestParameter) {
+                return true;
+            }
+            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (source.hasRestParameter && !target.hasRestParameter ||
+                source.hasRestParameter === target.hasRestParameter && source.parameters.length >= target.parameters.length)) {
+                return true;
+            }
+            return false;
+        }
+        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
+            if (source === target) {
+                return -1;
+            }
+            if (!(isMatchingSignature(source, target, partialMatch))) {
+                return 0;
+            }
+            if ((source.typeParameters ? source.typeParameters.length : 0) !== (target.typeParameters ? target.typeParameters.length : 0)) {
+                return 0;
+            }
+            source = getErasedSignature(source);
+            target = getErasedSignature(target);
+            var result = -1;
+            if (!ignoreThisTypes && source.thisType && target.thisType) {
+                var related = compareTypes(source.thisType, target.thisType);
+                if (!related) {
+                    return 0;
+                }
+                result &= related;
+            }
+            var targetLen = target.parameters.length;
+            for (var i = 0; i < targetLen; i++) {
+                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
+                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
+                var related = compareTypes(s, t);
+                if (!related) {
+                    return 0;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+            }
+            return result;
+        }
+        function isRestParameterIndex(signature, parameterIndex) {
+            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
+        }
+        function isSupertypeOfEach(candidate, types) {
+            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
+                var t = types_5[_i];
+                if (candidate !== t && !isTypeSubtypeOf(t, candidate))
+                    return false;
+            }
+            return true;
+        }
+        function getCombinedFlagsOfTypes(types) {
+            var flags = 0;
+            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
+                var t = types_6[_i];
+                flags |= t.flags;
+            }
+            return flags;
+        }
+        function getCommonSupertype(types) {
+            if (!strictNullChecks) {
+                return ts.forEach(types, function (t) { return isSupertypeOfEach(t, types) ? t : undefined; });
+            }
+            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 96); });
+            if (!primaryTypes.length) {
+                return getUnionType(types);
+            }
+            var supertype = ts.forEach(primaryTypes, function (t) { return isSupertypeOfEach(t, primaryTypes) ? t : undefined; });
+            return supertype && addTypeKind(supertype, getCombinedFlagsOfTypes(types) & 96);
+        }
+        function reportNoCommonSupertypeError(types, errorLocation, errorMessageChainHead) {
+            var bestSupertype;
+            var bestSupertypeDownfallType;
+            var bestSupertypeScore = 0;
+            for (var i = 0; i < types.length; i++) {
+                var score = 0;
+                var downfallType = undefined;
+                for (var j = 0; j < types.length; j++) {
+                    if (isTypeSubtypeOf(types[j], types[i])) {
+                        score++;
+                    }
+                    else if (!downfallType) {
+                        downfallType = types[j];
+                    }
+                }
+                ts.Debug.assert(!!downfallType, "If there is no common supertype, each type should have a downfallType");
+                if (score > bestSupertypeScore) {
+                    bestSupertype = types[i];
+                    bestSupertypeDownfallType = downfallType;
+                    bestSupertypeScore = score;
+                }
+                if (bestSupertypeScore === types.length - 1) {
+                    break;
+                }
+            }
+            checkTypeSubtypeOf(bestSupertypeDownfallType, bestSupertype, errorLocation, ts.Diagnostics.Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0, errorMessageChainHead);
+        }
+        function isArrayType(type) {
+            return type.flags & 4096 && type.target === globalArrayType;
+        }
+        function isArrayLikeType(type) {
+            return type.flags & 4096 && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
+                !(type.flags & 96) && isTypeAssignableTo(type, anyReadonlyArrayType);
+        }
+        function isTupleLikeType(type) {
+            return !!getPropertyOfType(type, "0");
+        }
+        function isStringLiteralType(type) {
+            return type.flags & 256;
+        }
+        function isTupleType(type) {
+            return !!(type.flags & 8192);
+        }
+        function getCombinedTypeFlags(type) {
+            return type.flags & 16384 ? getCombinedFlagsOfTypes(type.types) : type.flags;
+        }
+        function addTypeKind(type, kind) {
+            if ((getCombinedTypeFlags(type) & kind) === kind) {
+                return type;
+            }
+            var types = [type];
+            if (kind & 2)
+                types.push(stringType);
+            if (kind & 4)
+                types.push(numberType);
+            if (kind & 8)
+                types.push(booleanType);
+            if (kind & 16)
+                types.push(voidType);
+            if (kind & 32)
+                types.push(undefinedType);
+            if (kind & 64)
+                types.push(nullType);
+            return getUnionType(types);
+        }
+        function getNonNullableType(type) {
+            return strictNullChecks ? getTypeWithFacts(type, 524288) : type;
+        }
+        function isObjectLiteralType(type) {
+            return type.symbol && (type.symbol.flags & (4096 | 2048)) !== 0 &&
+                getSignaturesOfType(type, 0).length === 0 &&
+                getSignaturesOfType(type, 1).length === 0;
+        }
+        function createTransientSymbol(source, type) {
+            var symbol = createSymbol(source.flags | 67108864, source.name);
+            symbol.declarations = source.declarations;
+            symbol.parent = source.parent;
+            symbol.type = type;
+            symbol.target = source;
+            if (source.valueDeclaration) {
+                symbol.valueDeclaration = source.valueDeclaration;
+            }
+            return symbol;
+        }
+        function transformTypeOfMembers(type, f) {
+            var members = {};
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var property = _a[_i];
+                var original = getTypeOfSymbol(property);
+                var updated = f(original);
+                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
+            }
+            ;
+            return members;
+        }
+        function getRegularTypeOfObjectLiteral(type) {
+            if (!(type.flags & 1048576)) {
+                return type;
+            }
+            var regularType = type.regularType;
+            if (regularType) {
+                return regularType;
+            }
+            var resolved = type;
+            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
+            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
+            regularNew.flags = resolved.flags & ~1048576;
+            type.regularType = regularNew;
+            return regularNew;
+        }
+        function getWidenedTypeOfObjectLiteral(type) {
+            var members = transformTypeOfMembers(type, function (prop) {
+                var widened = getWidenedType(prop);
+                return prop === widened ? prop : widened;
+            });
+            var stringIndexInfo = getIndexInfoOfType(type, 0);
+            var numberIndexInfo = getIndexInfoOfType(type, 1);
+            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
+        }
+        function getWidenedConstituentType(type) {
+            return type.flags & 96 ? type : getWidenedType(type);
+        }
+        function getWidenedType(type) {
+            if (type.flags & 6291456) {
+                if (type.flags & 96) {
+                    return anyType;
+                }
+                if (type.flags & 524288) {
+                    return getWidenedTypeOfObjectLiteral(type);
+                }
+                if (type.flags & 16384) {
+                    return getUnionType(ts.map(type.types, getWidenedConstituentType), true);
+                }
+                if (isArrayType(type)) {
+                    return createArrayType(getWidenedType(type.typeArguments[0]));
+                }
+                if (isTupleType(type)) {
+                    return createTupleType(ts.map(type.elementTypes, getWidenedType));
+                }
+            }
+            return type;
+        }
+        function reportWideningErrorsInType(type) {
+            var errorReported = false;
+            if (type.flags & 16384) {
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
+                }
+            }
+            if (isArrayType(type)) {
+                return reportWideningErrorsInType(type.typeArguments[0]);
+            }
+            if (isTupleType(type)) {
+                for (var _b = 0, _c = type.elementTypes; _b < _c.length; _b++) {
+                    var t = _c[_b];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
+                }
+            }
+            if (type.flags & 524288) {
+                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
+                    var p = _e[_d];
+                    var t = getTypeOfSymbol(p);
+                    if (t.flags & 2097152) {
+                        if (!reportWideningErrorsInType(t)) {
+                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
+                        }
+                        errorReported = true;
+                    }
+                }
+            }
+            return errorReported;
+        }
+        function reportImplicitAnyError(declaration, type) {
+            var typeAsString = typeToString(getWidenedType(type));
+            var diagnostic;
+            switch (declaration.kind) {
+                case 145:
+                case 144:
+                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
+                    break;
+                case 142:
+                    diagnostic = declaration.dotDotDotToken ?
+                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
+                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
+                    break;
+                case 169:
+                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
+                    break;
+                case 220:
+                case 147:
+                case 146:
+                case 149:
+                case 150:
+                case 179:
+                case 180:
+                    if (!declaration.name) {
+                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
+                        return;
+                    }
+                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
+                    break;
+                default:
+                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
+            }
+            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
+        }
+        function reportErrorsFromWidening(declaration, type) {
+            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & 2097152) {
+                if (!reportWideningErrorsInType(type)) {
+                    reportImplicitAnyError(declaration, type);
+                }
+            }
+        }
+        function forEachMatchingParameterType(source, target, callback) {
+            var sourceMax = source.parameters.length;
+            var targetMax = target.parameters.length;
+            var count;
+            if (source.hasRestParameter && target.hasRestParameter) {
+                count = Math.max(sourceMax, targetMax);
+            }
+            else if (source.hasRestParameter) {
+                count = targetMax;
+            }
+            else if (target.hasRestParameter) {
+                count = sourceMax;
+            }
+            else {
+                count = Math.min(sourceMax, targetMax);
+            }
+            for (var i = 0; i < count; i++) {
+                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
+            }
+        }
+        function createInferenceContext(typeParameters, inferUnionTypes) {
+            var inferences = ts.map(typeParameters, createTypeInferencesObject);
+            return {
+                typeParameters: typeParameters,
+                inferUnionTypes: inferUnionTypes,
+                inferences: inferences,
+                inferredTypes: new Array(typeParameters.length)
+            };
+        }
+        function createTypeInferencesObject() {
+            return {
+                primary: undefined,
+                secondary: undefined,
+                isFixed: false
+            };
+        }
+        function inferTypes(context, source, target) {
+            var sourceStack;
+            var targetStack;
+            var depth = 0;
+            var inferiority = 0;
+            var visited = {};
+            inferFromTypes(source, target);
+            function isInProcess(source, target) {
+                for (var i = 0; i < depth; i++) {
+                    if (source === sourceStack[i] && target === targetStack[i]) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function inferFromTypes(source, target) {
+                if (source.flags & 16384 && target.flags & 16384 ||
+                    source.flags & 32768 && target.flags & 32768) {
+                    var matchingTypes = void 0;
+                    for (var _i = 0, _a = target.types; _i < _a.length; _i++) {
+                        var t = _a[_i];
+                        if (typeIdenticalToSomeType(t, source.types)) {
+                            (matchingTypes || (matchingTypes = [])).push(t);
+                            inferFromTypes(t, t);
+                        }
+                    }
+                    if (matchingTypes) {
+                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
+                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
+                    }
+                }
+                if (target.flags & 512) {
+                    if (source.flags & 8388608) {
+                        return;
+                    }
+                    var typeParameters = context.typeParameters;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (target === typeParameters[i]) {
+                            var inferences = context.inferences[i];
+                            if (!inferences.isFixed) {
+                                var candidates = inferiority ?
+                                    inferences.secondary || (inferences.secondary = []) :
+                                    inferences.primary || (inferences.primary = []);
+                                if (!ts.contains(candidates, source)) {
+                                    candidates.push(source);
+                                }
+                            }
+                            return;
+                        }
+                    }
+                }
+                else if (source.flags & 4096 && target.flags & 4096 && source.target === target.target) {
+                    var sourceTypes = source.typeArguments || emptyArray;
+                    var targetTypes = target.typeArguments || emptyArray;
+                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
+                    for (var i = 0; i < count; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
+                }
+                else if (source.flags & 8192 && target.flags & 8192 && source.elementTypes.length === target.elementTypes.length) {
+                    var sourceTypes = source.elementTypes;
+                    var targetTypes = target.elementTypes;
+                    for (var i = 0; i < sourceTypes.length; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
+                }
+                else if (target.flags & 49152) {
+                    var targetTypes = target.types;
+                    var typeParameterCount = 0;
+                    var typeParameter = void 0;
+                    for (var _b = 0, targetTypes_2 = targetTypes; _b < targetTypes_2.length; _b++) {
+                        var t = targetTypes_2[_b];
+                        if (t.flags & 512 && ts.contains(context.typeParameters, t)) {
+                            typeParameter = t;
+                            typeParameterCount++;
+                        }
+                        else {
+                            inferFromTypes(source, t);
+                        }
+                    }
+                    if (typeParameterCount === 1) {
+                        inferiority++;
+                        inferFromTypes(source, typeParameter);
+                        inferiority--;
+                    }
+                }
+                else if (source.flags & 49152) {
+                    var sourceTypes = source.types;
+                    for (var _c = 0, sourceTypes_3 = sourceTypes; _c < sourceTypes_3.length; _c++) {
+                        var sourceType = sourceTypes_3[_c];
+                        inferFromTypes(sourceType, target);
+                    }
+                }
+                else {
+                    source = getApparentType(source);
+                    if (source.flags & 80896 && (target.flags & 4096 && target.typeArguments ||
+                        target.flags & 8192 ||
+                        target.flags & 65536 && target.symbol && target.symbol.flags & (8192 | 2048 | 32))) {
+                        if (isInProcess(source, target)) {
+                            return;
+                        }
+                        if (isDeeplyNestedGeneric(source, sourceStack, depth) && isDeeplyNestedGeneric(target, targetStack, depth)) {
+                            return;
+                        }
+                        var key = source.id + "," + target.id;
+                        if (ts.hasProperty(visited, key)) {
+                            return;
+                        }
+                        visited[key] = true;
+                        if (depth === 0) {
+                            sourceStack = [];
+                            targetStack = [];
+                        }
+                        sourceStack[depth] = source;
+                        targetStack[depth] = target;
+                        depth++;
+                        inferFromProperties(source, target);
+                        inferFromSignatures(source, target, 0);
+                        inferFromSignatures(source, target, 1);
+                        inferFromIndexTypes(source, target);
+                        depth--;
+                    }
+                }
+            }
+            function inferFromProperties(source, target) {
+                var properties = getPropertiesOfObjectType(target);
+                for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
+                    var targetProp = properties_2[_i];
+                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
+                    if (sourceProp) {
+                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+                    }
+                }
+            }
+            function inferFromSignatures(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                var sourceLen = sourceSignatures.length;
+                var targetLen = targetSignatures.length;
+                var len = sourceLen < targetLen ? sourceLen : targetLen;
+                for (var i = 0; i < len; i++) {
+                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
+                }
+            }
+            function inferFromSignature(source, target) {
+                forEachMatchingParameterType(source, target, inferFromTypes);
+                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
+                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
+                }
+                else {
+                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+                }
+            }
+            function inferFromIndexTypes(source, target) {
+                var targetStringIndexType = getIndexTypeOfType(target, 0);
+                if (targetStringIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 0) ||
+                        getImplicitIndexTypeOfType(source, 0);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetStringIndexType);
+                    }
+                }
+                var targetNumberIndexType = getIndexTypeOfType(target, 1);
+                if (targetNumberIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 1) ||
+                        getIndexTypeOfType(source, 0) ||
+                        getImplicitIndexTypeOfType(source, 1);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetNumberIndexType);
+                    }
+                }
+            }
+        }
+        function typeIdenticalToSomeType(type, types) {
+            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
+                var t = types_7[_i];
+                if (isTypeIdenticalTo(t, type)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
+            var reducedTypes = [];
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (!typeIdenticalToSomeType(t, typesToRemove)) {
+                    reducedTypes.push(t);
+                }
+            }
+            return type.flags & 16384 ? getUnionType(reducedTypes, true) : getIntersectionType(reducedTypes);
+        }
+        function getInferenceCandidates(context, index) {
+            var inferences = context.inferences[index];
+            return inferences.primary || inferences.secondary || emptyArray;
+        }
+        function getInferredType(context, index) {
+            var inferredType = context.inferredTypes[index];
+            var inferenceSucceeded;
+            if (!inferredType) {
+                var inferences = getInferenceCandidates(context, index);
+                if (inferences.length) {
+                    var unionOrSuperType = context.inferUnionTypes ? getUnionType(inferences) : getCommonSupertype(inferences);
+                    inferredType = unionOrSuperType ? getWidenedType(unionOrSuperType) : unknownType;
+                    inferenceSucceeded = !!unionOrSuperType;
+                }
+                else {
+                    inferredType = emptyObjectType;
+                    inferenceSucceeded = true;
+                }
+                context.inferredTypes[index] = inferredType;
+                if (inferenceSucceeded) {
+                    var constraint = getConstraintOfTypeParameter(context.typeParameters[index]);
+                    if (constraint) {
+                        var instantiatedConstraint = instantiateType(constraint, getInferenceMapper(context));
+                        if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
+                            context.inferredTypes[index] = inferredType = instantiatedConstraint;
+                        }
+                    }
+                }
+                else if (context.failedTypeParameterIndex === undefined || context.failedTypeParameterIndex > index) {
+                    context.failedTypeParameterIndex = index;
+                }
+            }
+            return inferredType;
+        }
+        function getInferredTypes(context) {
+            for (var i = 0; i < context.inferredTypes.length; i++) {
+                getInferredType(context, i);
+            }
+            return context.inferredTypes;
+        }
+        function getResolvedSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 | 1048576, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol;
+            }
+            return links.resolvedSymbol;
+        }
+        function isInTypeQuery(node) {
+            while (node) {
+                switch (node.kind) {
+                    case 158:
+                        return true;
+                    case 69:
+                    case 139:
+                        node = node.parent;
+                        continue;
+                    default:
+                        return false;
+                }
+            }
+            ts.Debug.fail("should not get here");
+        }
+        function getFlowCacheKey(node) {
+            if (node.kind === 69) {
+                var symbol = getResolvedSymbol(node);
+                return symbol !== unknownSymbol ? "" + getSymbolId(symbol) : undefined;
+            }
+            if (node.kind === 97) {
+                return "0";
+            }
+            if (node.kind === 172) {
+                var key = getFlowCacheKey(node.expression);
+                return key && key + "." + node.name.text;
+            }
+            return undefined;
+        }
+        function isNullOrUndefinedLiteral(node) {
+            return node.kind === 93 ||
+                node.kind === 69 && getResolvedSymbol(node) === undefinedSymbol;
+        }
+        function getLeftmostIdentifierOrThis(node) {
+            switch (node.kind) {
+                case 69:
+                case 97:
+                    return node;
+                case 172:
+                    return getLeftmostIdentifierOrThis(node.expression);
+            }
+            return undefined;
+        }
+        function isMatchingReference(source, target) {
+            if (source.kind === target.kind) {
+                switch (source.kind) {
+                    case 69:
+                        return getResolvedSymbol(source) === getResolvedSymbol(target);
+                    case 97:
+                        return true;
+                    case 172:
+                        return source.name.text === target.name.text &&
+                            isMatchingReference(source.expression, target.expression);
+                }
+            }
+            return false;
+        }
+        function containsMatchingReference(source, target) {
+            while (source.kind === 172) {
+                source = source.expression;
+                if (isMatchingReference(source, target)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function isOrContainsMatchingReference(source, target) {
+            return isMatchingReference(source, target) || containsMatchingReference(source, target);
+        }
+        function hasMatchingArgument(callExpression, reference) {
+            if (callExpression.arguments) {
+                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
+                    var argument = _a[_i];
+                    if (isOrContainsMatchingReference(reference, argument)) {
+                        return true;
+                    }
+                }
+            }
+            if (callExpression.expression.kind === 172 &&
+                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
+                return true;
+            }
+            return false;
+        }
+        function getFlowNodeId(flow) {
+            if (!flow.id) {
+                flow.id = nextFlowId;
+                nextFlowId++;
+            }
+            return flow.id;
+        }
+        function typeMaybeAssignableTo(source, target) {
+            if (!(source.flags & 16384)) {
+                return isTypeAssignableTo(source, target);
+            }
+            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (isTypeAssignableTo(t, target)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function getAssignmentReducedType(declaredType, assignedType) {
+            if (declaredType !== assignedType && declaredType.flags & 16384) {
+                var reducedTypes = ts.filter(declaredType.types, function (t) { return typeMaybeAssignableTo(assignedType, t); });
+                if (reducedTypes.length) {
+                    return reducedTypes.length === 1 ? reducedTypes[0] : getUnionType(reducedTypes);
+                }
+            }
+            return declaredType;
+        }
+        function getTypeFacts(type) {
+            var flags = type.flags;
+            if (flags & 258) {
+                return strictNullChecks ? 4079361 : 4194049;
+            }
+            if (flags & 132) {
+                return strictNullChecks ? 4079234 : 4193922;
+            }
+            if (flags & 8) {
+                return strictNullChecks ? 4078980 : 4193668;
+            }
+            if (flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return resolved.callSignatures.length || resolved.constructSignatures.length || isTypeSubtypeOf(type, globalFunctionType) ?
+                    strictNullChecks ? 1970144 : 4181984 :
+                    strictNullChecks ? 1972176 : 4184016;
+            }
+            if (flags & (16 | 32)) {
+                return 2457472;
+            }
+            if (flags & 64) {
+                return 2340752;
+            }
+            if (flags & 16777216) {
+                return strictNullChecks ? 1981320 : 4193160;
+            }
+            if (flags & 512) {
+                var constraint = getConstraintOfTypeParameter(type);
+                return constraint ? getTypeFacts(constraint) : 4194303;
+            }
+            if (flags & 32768) {
+                return ts.reduceLeft(type.types, function (flags, type) { return flags |= getTypeFacts(type); }, 0);
+            }
+            return 4194303;
+        }
+        function getTypeWithFacts(type, include) {
+            if (!(type.flags & 16384)) {
+                return getTypeFacts(type) & include ? type : neverType;
+            }
+            var firstType;
+            var types;
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (getTypeFacts(t) & include) {
+                    if (!firstType) {
+                        firstType = t;
+                    }
+                    else {
+                        if (!types) {
+                            types = [firstType];
+                        }
+                        types.push(t);
+                    }
+                }
+            }
+            return firstType ? types ? getUnionType(types, true) : firstType : neverType;
+        }
+        function getTypeWithDefault(type, defaultExpression) {
+            if (defaultExpression) {
+                var defaultType = checkExpression(defaultExpression);
+                return getUnionType([getTypeWithFacts(type, 131072), defaultType]);
+            }
+            return type;
+        }
+        function getTypeOfDestructuredProperty(type, name) {
+            var text = getTextOfPropertyName(name);
+            return getTypeOfPropertyOfType(type, text) ||
+                isNumericLiteralName(text) && getIndexTypeOfType(type, 1) ||
+                getIndexTypeOfType(type, 0) ||
+                unknownType;
+        }
+        function getTypeOfDestructuredArrayElement(type, index) {
+            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
+                checkIteratedTypeOrElementType(type, undefined, false) ||
+                unknownType;
+        }
+        function getTypeOfDestructuredSpreadElement(type) {
+            return createArrayType(checkIteratedTypeOrElementType(type, undefined, false) || unknownType);
+        }
+        function getAssignedTypeOfBinaryExpression(node) {
+            return node.parent.kind === 170 || node.parent.kind === 253 ?
+                getTypeWithDefault(getAssignedType(node), node.right) :
+                checkExpression(node.right);
+        }
+        function getAssignedTypeOfArrayLiteralElement(node, element) {
+            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
+        }
+        function getAssignedTypeOfSpreadElement(node) {
+            return getTypeOfDestructuredSpreadElement(getAssignedType(node.parent));
+        }
+        function getAssignedTypeOfPropertyAssignment(node) {
+            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
+        }
+        function getAssignedTypeOfShorthandPropertyAssignment(node) {
+            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
+        }
+        function getAssignedType(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 207:
+                    return stringType;
+                case 208:
+                    return checkRightHandSideOfForOf(parent.expression) || unknownType;
+                case 187:
+                    return getAssignedTypeOfBinaryExpression(parent);
+                case 181:
+                    return undefinedType;
+                case 170:
+                    return getAssignedTypeOfArrayLiteralElement(parent, node);
+                case 191:
+                    return getAssignedTypeOfSpreadElement(parent);
+                case 253:
+                    return getAssignedTypeOfPropertyAssignment(parent);
+                case 254:
+                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
+            }
+            return unknownType;
+        }
+        function getInitialTypeOfBindingElement(node) {
+            var pattern = node.parent;
+            var parentType = getInitialType(pattern.parent);
+            var type = pattern.kind === 167 ?
+                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
+                !node.dotDotDotToken ?
+                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
+                    getTypeOfDestructuredSpreadElement(parentType);
+            return getTypeWithDefault(type, node.initializer);
+        }
+        function getTypeOfInitializer(node) {
+            var links = getNodeLinks(node);
+            return links.resolvedType || checkExpression(node);
+        }
+        function getInitialTypeOfVariableDeclaration(node) {
+            if (node.initializer) {
+                return getTypeOfInitializer(node.initializer);
+            }
+            if (node.parent.parent.kind === 207) {
+                return stringType;
+            }
+            if (node.parent.parent.kind === 208) {
+                return checkRightHandSideOfForOf(node.parent.parent.expression) || unknownType;
+            }
+            return unknownType;
+        }
+        function getInitialType(node) {
+            return node.kind === 218 ?
+                getInitialTypeOfVariableDeclaration(node) :
+                getInitialTypeOfBindingElement(node);
+        }
+        function getReferenceFromExpression(node) {
+            switch (node.kind) {
+                case 178:
+                    return getReferenceFromExpression(node.expression);
+                case 187:
+                    switch (node.operatorToken.kind) {
+                        case 56:
+                            return getReferenceFromExpression(node.left);
+                        case 24:
+                            return getReferenceFromExpression(node.right);
+                    }
+            }
+            return node;
+        }
+        function getFlowTypeOfReference(reference, declaredType, assumeInitialized, includeOuterFunctions) {
+            var key;
+            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & 16908175)) {
+                return declaredType;
+            }
+            var initialType = assumeInitialized ? declaredType : addTypeKind(declaredType, 32);
+            var visitedFlowStart = visitedFlowCount;
+            var result = getTypeAtFlowNode(reference.flowNode);
+            visitedFlowCount = visitedFlowStart;
+            if (reference.parent.kind === 196 && getTypeWithFacts(result, 524288) === neverType) {
+                return declaredType;
+            }
+            return result;
+            function getTypeAtFlowNode(flow) {
+                while (true) {
+                    if (flow.flags & 256) {
+                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
+                            if (visitedFlowNodes[i] === flow) {
+                                return visitedFlowTypes[i];
+                            }
+                        }
+                    }
+                    var type = void 0;
+                    if (flow.flags & 16) {
+                        type = getTypeAtFlowAssignment(flow);
+                        if (!type) {
+                            flow = flow.antecedent;
+                            continue;
+                        }
+                    }
+                    else if (flow.flags & 96) {
+                        type = getTypeAtFlowCondition(flow);
+                    }
+                    else if (flow.flags & 12) {
+                        if (flow.antecedents.length === 1) {
+                            flow = flow.antecedents[0];
+                            continue;
+                        }
+                        type = flow.flags & 4 ?
+                            getTypeAtFlowBranchLabel(flow) :
+                            getTypeAtFlowLoopLabel(flow);
+                    }
+                    else if (flow.flags & 2) {
+                        var container = flow.container;
+                        if (container && includeOuterFunctions) {
+                            flow = container.flowNode;
+                            continue;
+                        }
+                        type = initialType;
+                    }
+                    else {
+                        type = declaredType;
+                    }
+                    if (flow.flags & 256) {
+                        visitedFlowNodes[visitedFlowCount] = flow;
+                        visitedFlowTypes[visitedFlowCount] = type;
+                        visitedFlowCount++;
+                    }
+                    return type;
+                }
+            }
+            function getTypeAtFlowAssignment(flow) {
+                var node = flow.node;
+                if ((node.kind === 218 || node.kind === 169) &&
+                    reference.kind === 69 &&
+                    getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(reference)) === getSymbolOfNode(node)) {
+                    return declaredType.flags & 16384 ?
+                        getAssignmentReducedType(declaredType, getInitialType(node)) :
+                        declaredType;
+                }
+                if (isMatchingReference(reference, node)) {
+                    return declaredType.flags & 16384 ?
+                        getAssignmentReducedType(declaredType, getAssignedType(node)) :
+                        declaredType;
+                }
+                if (containsMatchingReference(reference, node)) {
+                    return declaredType;
+                }
+                return undefined;
+            }
+            function getTypeAtFlowCondition(flow) {
+                var type = getTypeAtFlowNode(flow.antecedent);
+                if (type !== neverType) {
+                    var assumeTrue = (flow.flags & 32) !== 0;
+                    type = narrowType(type, flow.expression, assumeTrue);
+                    if (type === neverType) {
+                        type = narrowType(declaredType, flow.expression, assumeTrue);
+                    }
+                }
+                return type;
+            }
+            function getTypeAtFlowBranchLabel(flow) {
+                var antecedentTypes = [];
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    var type = getTypeAtFlowNode(antecedent);
+                    if (type === declaredType && declaredType === initialType) {
+                        return type;
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                }
+                return getUnionType(antecedentTypes);
+            }
+            function getTypeAtFlowLoopLabel(flow) {
+                var id = getFlowNodeId(flow);
+                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = {});
+                if (!key) {
+                    key = getFlowCacheKey(reference);
+                }
+                if (cache[key]) {
+                    return cache[key];
+                }
+                for (var i = flowLoopStart; i < flowLoopCount; i++) {
+                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key) {
+                        return getUnionType(flowLoopTypes[i]);
+                    }
+                }
+                var antecedentTypes = [];
+                flowLoopNodes[flowLoopCount] = flow;
+                flowLoopKeys[flowLoopCount] = key;
+                flowLoopTypes[flowLoopCount] = antecedentTypes;
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    flowLoopCount++;
+                    var type = getTypeAtFlowNode(antecedent);
+                    flowLoopCount--;
+                    if (cache[key]) {
+                        return cache[key];
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                    if (type === declaredType) {
+                        break;
+                    }
+                }
+                return cache[key] = getUnionType(antecedentTypes);
+            }
+            function narrowTypeByTruthiness(type, expr, assumeTrue) {
+                return isMatchingReference(reference, expr) ? getTypeWithFacts(type, assumeTrue ? 1048576 : 2097152) : type;
+            }
+            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
+                switch (expr.operatorToken.kind) {
+                    case 56:
+                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
+                    case 30:
+                    case 31:
+                    case 32:
+                    case 33:
+                        if (isNullOrUndefinedLiteral(expr.right)) {
+                            return narrowTypeByNullCheck(type, expr, assumeTrue);
+                        }
+                        if (expr.left.kind === 182 && expr.right.kind === 9) {
+                            return narrowTypeByTypeof(type, expr, assumeTrue);
+                        }
+                        break;
+                    case 91:
+                        return narrowTypeByInstanceof(type, expr, assumeTrue);
+                    case 24:
+                        return narrowType(type, expr.right, assumeTrue);
+                }
+                return type;
+            }
+            function narrowTypeByNullCheck(type, expr, assumeTrue) {
+                var operator = expr.operatorToken.kind;
+                if (operator === 31 || operator === 33) {
+                    assumeTrue = !assumeTrue;
+                }
+                if (!strictNullChecks || !isMatchingReference(reference, getReferenceFromExpression(expr.left))) {
+                    return type;
+                }
+                var doubleEquals = operator === 30 || operator === 31;
+                var facts = doubleEquals ?
+                    assumeTrue ? 65536 : 524288 :
+                    expr.right.kind === 93 ?
+                        assumeTrue ? 32768 : 262144 :
+                        assumeTrue ? 16384 : 131072;
+                return getTypeWithFacts(type, facts);
+            }
+            function narrowTypeByTypeof(type, expr, assumeTrue) {
+                var left = getReferenceFromExpression(expr.left.expression);
+                var right = expr.right;
+                if (!isMatchingReference(reference, left)) {
+                    if (containsMatchingReference(reference, left)) {
+                        return declaredType;
+                    }
+                    return type;
+                }
+                if (expr.operatorToken.kind === 31 ||
+                    expr.operatorToken.kind === 33) {
+                    assumeTrue = !assumeTrue;
+                }
+                if (assumeTrue && !(type.flags & 16384)) {
+                    var targetType = ts.getProperty(typeofTypesByName, right.text);
+                    if (targetType && isTypeSubtypeOf(targetType, type)) {
+                        return targetType;
+                    }
+                }
+                var facts = assumeTrue ?
+                    ts.getProperty(typeofEQFacts, right.text) || 64 :
+                    ts.getProperty(typeofNEFacts, right.text) || 8192;
+                return getTypeWithFacts(type, facts);
+            }
+            function narrowTypeByInstanceof(type, expr, assumeTrue) {
+                var left = getReferenceFromExpression(expr.left);
+                if (!isMatchingReference(reference, left)) {
+                    if (containsMatchingReference(reference, left)) {
+                        return declaredType;
+                    }
+                    return type;
+                }
+                if (isTypeAny(type)) {
+                    return type;
+                }
+                var rightType = checkExpression(expr.right);
+                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
+                    return type;
+                }
+                var targetType;
+                var prototypeProperty = getPropertyOfType(rightType, "prototype");
+                if (prototypeProperty) {
+                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
+                    if (!isTypeAny(prototypePropertyType)) {
+                        targetType = prototypePropertyType;
+                    }
+                }
+                if (!targetType) {
+                    var constructSignatures = void 0;
+                    if (rightType.flags & 2048) {
+                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
+                    }
+                    else if (rightType.flags & 65536) {
+                        constructSignatures = getSignaturesOfType(rightType, 1);
+                    }
+                    if (constructSignatures && constructSignatures.length) {
+                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
+                    }
+                }
+                if (targetType) {
+                    return getNarrowedType(type, targetType, assumeTrue);
+                }
+                return type;
+            }
+            function getNarrowedType(type, candidate, assumeTrue) {
+                if (!assumeTrue) {
+                    return type.flags & 16384 ?
+                        getUnionType(ts.filter(type.types, function (t) { return !isTypeSubtypeOf(t, candidate); })) :
+                        type;
+                }
+                if (type.flags & 16384) {
+                    var assignableConstituents = ts.filter(type.types, function (t) { return isTypeAssignableTo(t, candidate); });
+                    if (assignableConstituents.length) {
+                        return getUnionType(assignableConstituents);
+                    }
+                }
+                var targetType = type.flags & 512 ? getApparentType(type) : type;
+                return isTypeAssignableTo(candidate, targetType) ? candidate :
+                    isTypeAssignableTo(type, candidate) ? type :
+                        getIntersectionType([type, candidate]);
+            }
+            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
+                if (type.flags & 1 || !hasMatchingArgument(callExpression, reference)) {
+                    return type;
+                }
+                var signature = getResolvedSignature(callExpression);
+                var predicate = signature.typePredicate;
+                if (!predicate) {
+                    return type;
+                }
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    var predicateArgument = callExpression.arguments[predicate.parameterIndex];
+                    if (predicateArgument) {
+                        if (isMatchingReference(reference, predicateArgument)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue);
+                        }
+                        if (containsMatchingReference(reference, predicateArgument)) {
+                            return declaredType;
+                        }
+                    }
+                }
+                else {
+                    var invokedExpression = skipParenthesizedNodes(callExpression.expression);
+                    if (invokedExpression.kind === 173 || invokedExpression.kind === 172) {
+                        var accessExpression = invokedExpression;
+                        var possibleReference = skipParenthesizedNodes(accessExpression.expression);
+                        if (isMatchingReference(reference, possibleReference)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue);
+                        }
+                        if (containsMatchingReference(reference, possibleReference)) {
+                            return declaredType;
+                        }
+                    }
+                }
+                return type;
+            }
+            function narrowType(type, expr, assumeTrue) {
+                switch (expr.kind) {
+                    case 69:
+                    case 97:
+                    case 172:
+                        return narrowTypeByTruthiness(type, expr, assumeTrue);
+                    case 174:
+                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
+                    case 178:
+                        return narrowType(type, expr.expression, assumeTrue);
+                    case 187:
+                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
+                    case 185:
+                        if (expr.operator === 49) {
+                            return narrowType(type, expr.operand, !assumeTrue);
+                        }
+                        break;
+                }
+                return type;
+            }
+        }
+        function getTypeOfSymbolAtLocation(symbol, location) {
+            if (location.kind === 69) {
+                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
+                    location = location.parent;
+                }
+                if (ts.isExpression(location) && !ts.isAssignmentTarget(location)) {
+                    var type = checkExpression(location);
+                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
+                        return type;
+                    }
+                }
+            }
+            return getTypeOfSymbol(symbol);
+        }
+        function skipParenthesizedNodes(expression) {
+            while (expression.kind === 178) {
+                expression = expression.expression;
+            }
+            return expression;
+        }
+        function getControlFlowContainer(node) {
+            while (true) {
+                node = node.parent;
+                if (ts.isFunctionLike(node) || node.kind === 226 || node.kind === 256 || node.kind === 145) {
+                    return node;
+                }
+            }
+        }
+        function isDeclarationIncludedInFlow(reference, declaration, includeOuterFunctions) {
+            var declarationContainer = getControlFlowContainer(declaration);
+            var container = getControlFlowContainer(reference);
+            while (container !== declarationContainer &&
+                (container.kind === 179 || container.kind === 180) &&
+                (includeOuterFunctions || ts.getImmediatelyInvokedFunctionExpression(container))) {
+                container = getControlFlowContainer(container);
+            }
+            return container === declarationContainer;
+        }
+        function checkIdentifier(node) {
+            var symbol = getResolvedSymbol(node);
+            if (symbol === argumentsSymbol) {
+                var container = ts.getContainingFunction(node);
+                if (container.kind === 180) {
+                    if (languageVersion < 2) {
+                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
+                    }
+                }
+                if (node.flags & 33554432) {
+                    getNodeLinks(container).flags |= 8192;
+                }
+            }
+            if (symbol.flags & 8388608 && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
+                markAliasSymbolAsReferenced(symbol);
+            }
+            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
+            if (languageVersion === 2
+                && localOrExportSymbol.flags & 32
+                && localOrExportSymbol.valueDeclaration.kind === 221
+                && ts.nodeIsDecorated(localOrExportSymbol.valueDeclaration)) {
+                var container = ts.getContainingClass(node);
+                while (container !== undefined) {
+                    if (container === localOrExportSymbol.valueDeclaration && container.name !== node) {
+                        getNodeLinks(container).flags |= 524288;
+                        getNodeLinks(node).flags |= 1048576;
+                        break;
+                    }
+                    container = ts.getContainingClass(container);
+                }
+            }
+            checkCollisionWithCapturedSuperVariable(node, node);
+            checkCollisionWithCapturedThisVariable(node, node);
+            checkNestedBlockScopedBinding(node, symbol);
+            var type = getTypeOfSymbol(localOrExportSymbol);
+            if (!(localOrExportSymbol.flags & 3) || ts.isAssignmentTarget(node)) {
+                return type;
+            }
+            var declaration = localOrExportSymbol.valueDeclaration;
+            var includeOuterFunctions = isReadonlySymbol(localOrExportSymbol);
+            var assumeInitialized = !strictNullChecks || (type.flags & 1) !== 0 || !declaration ||
+                ts.getRootDeclaration(declaration).kind === 142 || ts.isInAmbientContext(declaration) ||
+                !isDeclarationIncludedInFlow(node, declaration, includeOuterFunctions);
+            var flowType = getFlowTypeOfReference(node, type, assumeInitialized, includeOuterFunctions);
+            if (!assumeInitialized && !(getCombinedTypeFlags(type) & 32) && getCombinedTypeFlags(flowType) & 32) {
+                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
+                return type;
+            }
+            return flowType;
+        }
+        function isInsideFunction(node, threshold) {
+            var current = node;
+            while (current && current !== threshold) {
+                if (ts.isFunctionLike(current)) {
+                    return true;
+                }
+                current = current.parent;
+            }
+            return false;
+        }
+        function checkNestedBlockScopedBinding(node, symbol) {
+            if (languageVersion >= 2 ||
+                (symbol.flags & (2 | 32)) === 0 ||
+                symbol.valueDeclaration.parent.kind === 252) {
+                return;
+            }
+            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+            var usedInFunction = isInsideFunction(node.parent, container);
+            var current = container;
+            var containedInIterationStatement = false;
+            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
+                if (ts.isIterationStatement(current, false)) {
+                    containedInIterationStatement = true;
+                    break;
+                }
+                current = current.parent;
+            }
+            if (containedInIterationStatement) {
+                if (usedInFunction) {
+                    getNodeLinks(current).flags |= 65536;
+                }
+                if (container.kind === 206 &&
+                    ts.getAncestor(symbol.valueDeclaration, 219).parent === container &&
+                    isAssignedInBodyOfForStatement(node, container)) {
+                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152;
+                }
+                getNodeLinks(symbol.valueDeclaration).flags |= 262144;
+            }
+            if (usedInFunction) {
+                getNodeLinks(symbol.valueDeclaration).flags |= 131072;
+            }
+        }
+        function isAssignedInBodyOfForStatement(node, container) {
+            var current = node;
+            while (current.parent.kind === 178) {
+                current = current.parent;
+            }
+            var isAssigned = false;
+            if (ts.isAssignmentTarget(current)) {
+                isAssigned = true;
+            }
+            else if ((current.parent.kind === 185 || current.parent.kind === 186)) {
+                var expr = current.parent;
+                isAssigned = expr.operator === 41 || expr.operator === 42;
+            }
+            if (!isAssigned) {
+                return false;
+            }
+            while (current !== container) {
+                if (current === container.statement) {
+                    return true;
+                }
+                else {
+                    current = current.parent;
+                }
+            }
+            return false;
+        }
+        function captureLexicalThis(node, container) {
+            getNodeLinks(node).flags |= 2;
+            if (container.kind === 145 || container.kind === 148) {
+                var classNode = container.parent;
+                getNodeLinks(classNode).flags |= 4;
+            }
+            else {
+                getNodeLinks(container).flags |= 4;
+            }
+        }
+        function findFirstSuperCall(n) {
+            if (ts.isSuperCallExpression(n)) {
+                return n;
+            }
+            else if (ts.isFunctionLike(n)) {
+                return undefined;
+            }
+            return ts.forEachChild(n, findFirstSuperCall);
+        }
+        function getSuperCallInConstructor(constructor) {
+            var links = getNodeLinks(constructor);
+            if (links.hasSuperCall === undefined) {
+                links.superCall = findFirstSuperCall(constructor.body);
+                links.hasSuperCall = links.superCall ? true : false;
+            }
+            return links.superCall;
+        }
+        function classDeclarationExtendsNull(classDecl) {
+            var classSymbol = getSymbolOfNode(classDecl);
+            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
+            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
+            return baseConstructorType === nullWideningType;
+        }
+        function checkThisExpression(node) {
+            var container = ts.getThisContainer(node, true);
+            var needToCaptureLexicalThis = false;
+            if (container.kind === 148) {
+                var containingClassDecl = container.parent;
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
+                if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
+                    var superCall = getSuperCallInConstructor(container);
+                    if (!superCall || superCall.end > node.pos) {
+                        error(node, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
+                    }
+                }
+            }
+            if (container.kind === 180) {
+                container = ts.getThisContainer(container, false);
+                needToCaptureLexicalThis = (languageVersion < 2);
+            }
+            switch (container.kind) {
+                case 225:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
+                    break;
+                case 224:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                    break;
+                case 148:
+                    if (isInConstructorArgumentInitializer(node, container)) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
+                    }
+                    break;
+                case 145:
+                case 144:
+                    if (container.flags & 32) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
+                    }
+                    break;
+                case 140:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
+                    break;
+            }
+            if (needToCaptureLexicalThis) {
+                captureLexicalThis(node, container);
+            }
+            if (ts.isFunctionLike(container) &&
+                (!isInParameterInitializerBeforeContainingFunction(node) || getFunctionLikeThisParameter(container))) {
+                if (container.kind === 179 &&
+                    ts.isInJavaScriptFile(container.parent) &&
+                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3) {
+                    var className = container.parent
+                        .left
+                        .expression
+                        .expression;
+                    var classSymbol = checkExpression(className).symbol;
+                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16)) {
+                        return getInferredClassType(classSymbol);
+                    }
+                }
+                var type = getContextuallyTypedThisType(container);
+                if (type) {
+                    return type;
+                }
+                var signature = getSignatureFromDeclaration(container);
+                if (signature.thisType) {
+                    return signature.thisType;
+                }
+            }
+            if (ts.isClassLike(container.parent)) {
+                var symbol = getSymbolOfNode(container.parent);
+                var type = container.flags & 32 ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
+                return getFlowTypeOfReference(node, type, true, true);
+            }
+            if (ts.isInJavaScriptFile(node)) {
+                var type = getTypeForThisExpressionFromJSDoc(container);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            if (compilerOptions.noImplicitThis) {
+                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
+            }
+            return anyType;
+        }
+        function getTypeForThisExpressionFromJSDoc(node) {
+            var typeTag = ts.getJSDocTypeTag(node);
+            if (typeTag && typeTag.typeExpression && typeTag.typeExpression.type && typeTag.typeExpression.type.kind === 269) {
+                var jsDocFunctionType = typeTag.typeExpression.type;
+                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 272) {
+                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
+                }
+            }
+        }
+        function isInConstructorArgumentInitializer(node, constructorDecl) {
+            for (var n = node; n && n !== constructorDecl; n = n.parent) {
+                if (n.kind === 142) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkSuperExpression(node) {
+            var isCallExpression = node.parent.kind === 174 && node.parent.expression === node;
+            var container = ts.getSuperContainer(node, true);
+            var needToCaptureLexicalThis = false;
+            if (!isCallExpression) {
+                while (container && container.kind === 180) {
+                    container = ts.getSuperContainer(container, true);
+                    needToCaptureLexicalThis = languageVersion < 2;
+                }
+            }
+            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
+            var nodeCheckFlag = 0;
+            if (!canUseSuperExpression) {
+                var current = node;
+                while (current && current !== container && current.kind !== 140) {
+                    current = current.parent;
+                }
+                if (current && current.kind === 140) {
+                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
+                }
+                else if (isCallExpression) {
+                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
+                }
+                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 171)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
+                }
+                else {
+                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
+                }
+                return unknownType;
+            }
+            if ((container.flags & 32) || isCallExpression) {
+                nodeCheckFlag = 512;
+            }
+            else {
+                nodeCheckFlag = 256;
+            }
+            getNodeLinks(node).flags |= nodeCheckFlag;
+            if (container.kind === 147 && container.flags & 256) {
+                if (ts.isSuperPropertyOrElementAccess(node.parent) && ts.isAssignmentTarget(node.parent)) {
+                    getNodeLinks(container).flags |= 4096;
+                }
+                else {
+                    getNodeLinks(container).flags |= 2048;
+                }
+            }
+            if (needToCaptureLexicalThis) {
+                captureLexicalThis(node.parent, container);
+            }
+            if (container.parent.kind === 171) {
+                if (languageVersion < 2) {
+                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
+                    return unknownType;
+                }
+                else {
+                    return anyType;
+                }
+            }
+            var classLikeDeclaration = container.parent;
+            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
+            var baseClassType = classType && getBaseTypes(classType)[0];
+            if (!baseClassType) {
+                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
+                }
+                return unknownType;
+            }
+            if (container.kind === 148 && isInConstructorArgumentInitializer(node, container)) {
+                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
+                return unknownType;
+            }
+            return nodeCheckFlag === 512
+                ? getBaseConstructorTypeOfClass(classType)
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
+            function isLegalUsageOfSuperExpression(container) {
+                if (!container) {
+                    return false;
+                }
+                if (isCallExpression) {
+                    return container.kind === 148;
+                }
+                else {
+                    if (ts.isClassLike(container.parent) || container.parent.kind === 171) {
+                        if (container.flags & 32) {
+                            return container.kind === 147 ||
+                                container.kind === 146 ||
+                                container.kind === 149 ||
+                                container.kind === 150;
+                        }
+                        else {
+                            return container.kind === 147 ||
+                                container.kind === 146 ||
+                                container.kind === 149 ||
+                                container.kind === 150 ||
+                                container.kind === 145 ||
+                                container.kind === 144 ||
+                                container.kind === 148;
+                        }
+                    }
+                }
+                return false;
+            }
+        }
+        function getContextuallyTypedThisType(func) {
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func) && func.kind !== 180) {
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    return contextualSignature.thisType;
+                }
+            }
+            return undefined;
+        }
+        function getContextuallyTypedParameterType(parameter) {
+            var func = parameter.parent;
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
+                var iife = ts.getImmediatelyInvokedFunctionExpression(func);
+                if (iife) {
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
+                        if (parameter.dotDotDotToken) {
+                            var restTypes = [];
+                            for (var i = indexOfParameter; i < iife.arguments.length; i++) {
+                                restTypes.push(getTypeOfExpression(iife.arguments[i]));
+                            }
+                            return createArrayType(getUnionType(restTypes));
+                        }
+                        var links = getNodeLinks(iife);
+                        var cached = links.resolvedSignature;
+                        links.resolvedSignature = anySignature;
+                        var type = checkExpression(iife.arguments[indexOfParameter]);
+                        links.resolvedSignature = cached;
+                        return type;
+                    }
+                }
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    var funcHasRestParameters = ts.hasRestParameter(func);
+                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (indexOfParameter < len) {
+                        return getTypeAtPosition(contextualSignature, indexOfParameter);
+                    }
+                    if (funcHasRestParameters &&
+                        indexOfParameter === (func.parameters.length - 1) &&
+                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
+                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
+                    }
+                }
+            }
+            return undefined;
+        }
+        function getContextualTypeForInitializerExpression(node) {
+            var declaration = node.parent;
+            if (node === declaration.initializer) {
+                if (declaration.type) {
+                    return getTypeFromTypeNode(declaration.type);
+                }
+                if (declaration.kind === 142) {
+                    var type = getContextuallyTypedParameterType(declaration);
+                    if (type) {
+                        return type;
+                    }
+                }
+                if (ts.isBindingPattern(declaration.name)) {
+                    return getTypeFromBindingPattern(declaration.name, true);
+                }
+                if (ts.isBindingPattern(declaration.parent)) {
+                    var parentDeclaration = declaration.parent.parent;
+                    var name_12 = declaration.propertyName || declaration.name;
+                    if (ts.isVariableLike(parentDeclaration) &&
+                        parentDeclaration.type &&
+                        !ts.isBindingPattern(name_12)) {
+                        var text = getTextOfPropertyName(name_12);
+                        if (text) {
+                            return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text);
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function getContextualTypeForReturnExpression(node) {
+            var func = ts.getContainingFunction(node);
+            if (ts.isAsyncFunctionLike(func)) {
+                var contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return getPromisedType(contextualReturnType);
+                }
+                return undefined;
+            }
+            if (func && !func.asteriskToken) {
+                return getContextualReturnType(func);
+            }
+            return undefined;
+        }
+        function getContextualTypeForYieldOperand(node) {
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return node.asteriskToken
+                        ? contextualReturnType
+                        : getElementTypeOfIterableIterator(contextualReturnType);
+                }
+            }
+            return undefined;
+        }
+        function isInParameterInitializerBeforeContainingFunction(node) {
+            while (node.parent && !ts.isFunctionLike(node.parent)) {
+                if (node.parent.kind === 142 && node.parent.initializer === node) {
+                    return true;
+                }
+                node = node.parent;
+            }
+            return false;
+        }
+        function getContextualReturnType(functionDecl) {
+            if (functionDecl.type ||
+                functionDecl.kind === 148 ||
+                functionDecl.kind === 149 && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(functionDecl.symbol, 150))) {
+                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
+            }
+            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
+            if (signature) {
+                return getReturnTypeOfSignature(signature);
+            }
+            return undefined;
+        }
+        function getContextualTypeForArgument(callTarget, arg) {
+            var args = getEffectiveCallArguments(callTarget);
+            var argIndex = ts.indexOf(args, arg);
+            if (argIndex >= 0) {
+                var signature = getResolvedOrAnySignature(callTarget);
+                return getTypeAtPosition(signature, argIndex);
+            }
+            return undefined;
+        }
+        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
+            if (template.parent.kind === 176) {
+                return getContextualTypeForArgument(template.parent, substitutionExpression);
+            }
+            return undefined;
+        }
+        function getContextualTypeForBinaryOperand(node) {
+            var binaryExpression = node.parent;
+            var operator = binaryExpression.operatorToken.kind;
+            if (operator >= 56 && operator <= 68) {
+                if (node === binaryExpression.right) {
+                    return checkExpression(binaryExpression.left);
+                }
+            }
+            else if (operator === 52) {
+                var type = getContextualType(binaryExpression);
+                if (!type && node === binaryExpression.right) {
+                    type = checkExpression(binaryExpression.left);
+                }
+                return type;
+            }
+            else if (operator === 51 || operator === 24) {
+                if (node === binaryExpression.right) {
+                    return getContextualType(binaryExpression);
+                }
+            }
+            return undefined;
+        }
+        function applyToContextualType(type, mapper) {
+            if (!(type.flags & 16384)) {
+                return mapper(type);
+            }
+            var types = type.types;
+            var mappedType;
+            var mappedTypes;
+            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
+                var current = types_8[_i];
+                var t = mapper(current);
+                if (t) {
+                    if (!mappedType) {
+                        mappedType = t;
+                    }
+                    else if (!mappedTypes) {
+                        mappedTypes = [mappedType, t];
+                    }
+                    else {
+                        mappedTypes.push(t);
+                    }
+                }
+            }
+            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
+        }
+        function getTypeOfPropertyOfContextualType(type, name) {
+            return applyToContextualType(type, function (t) {
+                var prop = t.flags & 130048 ? getPropertyOfType(t, name) : undefined;
+                return prop ? getTypeOfSymbol(prop) : undefined;
+            });
+        }
+        function getIndexTypeOfContextualType(type, kind) {
+            return applyToContextualType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
+        }
+        function contextualTypeIsStringLiteralType(type) {
+            return !!(type.flags & 16384 ? ts.forEach(type.types, isStringLiteralType) : isStringLiteralType(type));
+        }
+        function contextualTypeIsTupleLikeType(type) {
+            return !!(type.flags & 16384 ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
+        }
+        function getContextualTypeForObjectLiteralMethod(node) {
+            ts.Debug.assert(ts.isObjectLiteralMethod(node));
+            if (isInsideWithStatementBody(node)) {
+                return undefined;
+            }
+            return getContextualTypeForObjectLiteralElement(node);
+        }
+        function getContextualTypeForObjectLiteralElement(element) {
+            var objectLiteral = element.parent;
+            var type = getApparentTypeOfContextualType(objectLiteral);
+            if (type) {
+                if (!ts.hasDynamicName(element)) {
+                    var symbolName = getSymbolOfNode(element).name;
+                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
+                    if (propertyType) {
+                        return propertyType;
+                    }
+                }
+                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1) ||
+                    getIndexTypeOfContextualType(type, 0);
+            }
+            return undefined;
+        }
+        function getContextualTypeForElementExpression(node) {
+            var arrayLiteral = node.parent;
+            var type = getApparentTypeOfContextualType(arrayLiteral);
+            if (type) {
+                var index = ts.indexOf(arrayLiteral.elements, node);
+                return getTypeOfPropertyOfContextualType(type, "" + index)
+                    || getIndexTypeOfContextualType(type, 1)
+                    || (languageVersion >= 2 ? getElementTypeOfIterable(type, undefined) : undefined);
+            }
+            return undefined;
+        }
+        function getContextualTypeForConditionalOperand(node) {
+            var conditional = node.parent;
+            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
+        }
+        function getContextualTypeForJsxAttribute(attribute) {
+            var kind = attribute.kind;
+            var jsxElement = attribute.parent;
+            var attrsType = getJsxElementAttributesType(jsxElement);
+            if (attribute.kind === 246) {
+                if (!attrsType || isTypeAny(attrsType)) {
+                    return undefined;
+                }
+                return getTypeOfPropertyOfType(attrsType, attribute.name.text);
+            }
+            else if (attribute.kind === 247) {
+                return attrsType;
+            }
+            ts.Debug.fail("Expected JsxAttribute or JsxSpreadAttribute, got ts.SyntaxKind[" + kind + "]");
+        }
+        function getApparentTypeOfContextualType(node) {
+            var type = getContextualType(node);
+            return type && getApparentType(type);
+        }
+        function getContextualType(node) {
+            if (isInsideWithStatementBody(node)) {
+                return undefined;
+            }
+            if (node.contextualType) {
+                return node.contextualType;
+            }
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 218:
+                case 142:
+                case 145:
+                case 144:
+                case 169:
+                    return getContextualTypeForInitializerExpression(node);
+                case 180:
+                case 211:
+                    return getContextualTypeForReturnExpression(node);
+                case 190:
+                    return getContextualTypeForYieldOperand(parent);
+                case 174:
+                case 175:
+                    return getContextualTypeForArgument(parent, node);
+                case 177:
+                case 195:
+                    return getTypeFromTypeNode(parent.type);
+                case 187:
+                    return getContextualTypeForBinaryOperand(node);
+                case 253:
+                    return getContextualTypeForObjectLiteralElement(parent);
+                case 170:
+                    return getContextualTypeForElementExpression(node);
+                case 188:
+                    return getContextualTypeForConditionalOperand(node);
+                case 197:
+                    ts.Debug.assert(parent.parent.kind === 189);
+                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
+                case 178:
+                    return getContextualType(parent);
+                case 248:
+                    return getContextualType(parent);
+                case 246:
+                case 247:
+                    return getContextualTypeForJsxAttribute(parent);
+            }
+            return undefined;
+        }
+        function getNonGenericSignature(type) {
+            var signatures = getSignaturesOfStructuredType(type, 0);
+            if (signatures.length === 1) {
+                var signature = signatures[0];
+                if (!signature.typeParameters) {
+                    return signature;
+                }
+            }
+        }
+        function isFunctionExpressionOrArrowFunction(node) {
+            return node.kind === 179 || node.kind === 180;
+        }
+        function getContextualSignatureForFunctionLikeDeclaration(node) {
+            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
+                ? getContextualSignature(node)
+                : undefined;
+        }
+        function getContextualTypeForFunctionLikeDeclaration(node) {
+            return ts.isObjectLiteralMethod(node) ?
+                getContextualTypeForObjectLiteralMethod(node) :
+                getApparentTypeOfContextualType(node);
+        }
+        function getContextualSignature(node) {
+            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
+            var type = getContextualTypeForFunctionLikeDeclaration(node);
+            if (!type) {
+                return undefined;
+            }
+            if (!(type.flags & 16384)) {
+                return getNonGenericSignature(type);
+            }
+            var signatureList;
+            var types = type.types;
+            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
+                var current = types_9[_i];
+                var signature = getNonGenericSignature(current);
+                if (signature) {
+                    if (!signatureList) {
+                        signatureList = [signature];
+                    }
+                    else if (!compareSignaturesIdentical(signatureList[0], signature, false, true, true, compareTypesIdentical)) {
+                        return undefined;
+                    }
+                    else {
+                        signatureList.push(signature);
+                    }
+                }
+            }
+            var result;
+            if (signatureList) {
+                result = cloneSignature(signatureList[0]);
+                result.resolvedReturnType = undefined;
+                result.unionSignatures = signatureList;
+            }
+            return result;
+        }
+        function isInferentialContext(mapper) {
+            return mapper && mapper.context;
+        }
+        function checkSpreadElementExpression(node, contextualMapper) {
+            var arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
+            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, false);
+        }
+        function hasDefaultValue(node) {
+            return (node.kind === 169 && !!node.initializer) ||
+                (node.kind === 187 && node.operatorToken.kind === 56);
+        }
+        function checkArrayLiteral(node, contextualMapper) {
+            var elements = node.elements;
+            var hasSpreadElement = false;
+            var elementTypes = [];
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
+                var e = elements_1[_i];
+                if (inDestructuringPattern && e.kind === 191) {
+                    var restArrayType = checkExpression(e.expression, contextualMapper);
+                    var restElementType = getIndexTypeOfType(restArrayType, 1) ||
+                        (languageVersion >= 2 ? getElementTypeOfIterable(restArrayType, undefined) : undefined);
+                    if (restElementType) {
+                        elementTypes.push(restElementType);
+                    }
+                }
+                else {
+                    var type = checkExpression(e, contextualMapper);
+                    elementTypes.push(type);
+                }
+                hasSpreadElement = hasSpreadElement || e.kind === 191;
+            }
+            if (!hasSpreadElement) {
+                if (inDestructuringPattern && elementTypes.length) {
+                    var type = createNewTupleType(elementTypes);
+                    type.pattern = node;
+                    return type;
+                }
+                var contextualType = getApparentTypeOfContextualType(node);
+                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
+                    var pattern = contextualType.pattern;
+                    if (pattern && (pattern.kind === 168 || pattern.kind === 170)) {
+                        var patternElements = pattern.elements;
+                        for (var i = elementTypes.length; i < patternElements.length; i++) {
+                            var patternElement = patternElements[i];
+                            if (hasDefaultValue(patternElement)) {
+                                elementTypes.push(contextualType.elementTypes[i]);
+                            }
+                            else {
+                                if (patternElement.kind !== 193) {
+                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                                }
+                                elementTypes.push(unknownType);
+                            }
+                        }
+                    }
+                    if (elementTypes.length) {
+                        return createTupleType(elementTypes);
+                    }
+                }
+            }
+            return createArrayType(elementTypes.length ? getUnionType(elementTypes) : strictNullChecks ? neverType : undefinedWideningType);
+        }
+        function isNumericName(name) {
+            return name.kind === 140 ? isNumericComputedName(name) : isNumericLiteralName(name.text);
+        }
+        function isNumericComputedName(name) {
+            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 132);
+        }
+        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
+            return isTypeAny(type) || isTypeOfKind(type, kind);
+        }
+        function isNumericLiteralName(name) {
+            return (+name).toString() === name;
+        }
+        function checkComputedPropertyName(node) {
+            var links = getNodeLinks(node.expression);
+            if (!links.resolvedType) {
+                links.resolvedType = checkExpression(node.expression);
+                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 132 | 258 | 16777216)) {
+                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
+                }
+                else {
+                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, true);
+                }
+            }
+            return links.resolvedType;
+        }
+        function getObjectLiteralIndexInfo(node, properties, kind) {
+            var propTypes = [];
+            for (var i = 0; i < properties.length; i++) {
+                if (kind === 0 || isNumericName(node.properties[i].name)) {
+                    propTypes.push(getTypeOfSymbol(properties[i]));
+                }
+            }
+            var unionType = propTypes.length ? getUnionType(propTypes) : undefinedType;
+            return createIndexInfo(unionType, false);
+        }
+        function checkObjectLiteral(node, contextualMapper) {
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
+            var propertiesTable = {};
+            var propertiesArray = [];
+            var contextualType = getApparentTypeOfContextualType(node);
+            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
+                (contextualType.pattern.kind === 167 || contextualType.pattern.kind === 171);
+            var typeFlags = 0;
+            var patternWithComputedProperties = false;
+            var hasComputedStringProperty = false;
+            var hasComputedNumberProperty = false;
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var memberDecl = _a[_i];
+                var member = memberDecl.symbol;
+                if (memberDecl.kind === 253 ||
+                    memberDecl.kind === 254 ||
+                    ts.isObjectLiteralMethod(memberDecl)) {
+                    var type = void 0;
+                    if (memberDecl.kind === 253) {
+                        type = checkPropertyAssignment(memberDecl, contextualMapper);
+                    }
+                    else if (memberDecl.kind === 147) {
+                        type = checkObjectLiteralMethod(memberDecl, contextualMapper);
+                    }
+                    else {
+                        ts.Debug.assert(memberDecl.kind === 254);
+                        type = checkExpression(memberDecl.name, contextualMapper);
+                    }
+                    typeFlags |= type.flags;
+                    var prop = createSymbol(4 | 67108864 | member.flags, member.name);
+                    if (inDestructuringPattern) {
+                        var isOptional = (memberDecl.kind === 253 && hasDefaultValue(memberDecl.initializer)) ||
+                            (memberDecl.kind === 254 && memberDecl.objectAssignmentInitializer);
+                        if (isOptional) {
+                            prop.flags |= 536870912;
+                        }
+                        if (ts.hasDynamicName(memberDecl)) {
+                            patternWithComputedProperties = true;
+                        }
+                    }
+                    else if (contextualTypeHasPattern && !(contextualType.flags & 67108864)) {
+                        var impliedProp = getPropertyOfType(contextualType, member.name);
+                        if (impliedProp) {
+                            prop.flags |= impliedProp.flags & 536870912;
+                        }
+                        else if (!compilerOptions.suppressExcessPropertyErrors) {
+                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
+                        }
+                    }
+                    prop.declarations = member.declarations;
+                    prop.parent = member.parent;
+                    if (member.valueDeclaration) {
+                        prop.valueDeclaration = member.valueDeclaration;
+                    }
+                    prop.type = type;
+                    prop.target = member;
+                    member = prop;
+                }
+                else {
+                    ts.Debug.assert(memberDecl.kind === 149 || memberDecl.kind === 150);
+                    checkAccessorDeclaration(memberDecl);
+                }
+                if (ts.hasDynamicName(memberDecl)) {
+                    if (isNumericName(memberDecl.name)) {
+                        hasComputedNumberProperty = true;
+                    }
+                    else {
+                        hasComputedStringProperty = true;
+                    }
+                }
+                else {
+                    propertiesTable[member.name] = member;
+                }
+                propertiesArray.push(member);
+            }
+            if (contextualTypeHasPattern) {
+                for (var _b = 0, _c = getPropertiesOfType(contextualType); _b < _c.length; _b++) {
+                    var prop = _c[_b];
+                    if (!ts.hasProperty(propertiesTable, prop.name)) {
+                        if (!(prop.flags & 536870912)) {
+                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                        }
+                        propertiesTable[prop.name] = prop;
+                        propertiesArray.push(prop);
+                    }
+                }
+            }
+            var stringIndexInfo = hasComputedStringProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 0) : undefined;
+            var numberIndexInfo = hasComputedNumberProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 1) : undefined;
+            var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
+            var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576;
+            result.flags |= 524288 | 4194304 | freshObjectLiteralFlag | (typeFlags & 14680064) | (patternWithComputedProperties ? 67108864 : 0);
+            if (inDestructuringPattern) {
+                result.pattern = node;
+            }
+            return result;
+        }
+        function checkJsxSelfClosingElement(node) {
+            checkJsxOpeningLikeElement(node);
+            return jsxElementType || anyType;
+        }
+        function checkJsxElement(node) {
+            checkJsxOpeningLikeElement(node.openingElement);
+            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
+                getIntrinsicTagSymbol(node.closingElement);
+            }
+            else {
+                checkExpression(node.closingElement.tagName);
+            }
+            for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
+                var child = _a[_i];
+                switch (child.kind) {
+                    case 248:
+                        checkJsxExpression(child);
+                        break;
+                    case 241:
+                        checkJsxElement(child);
+                        break;
+                    case 242:
+                        checkJsxSelfClosingElement(child);
+                        break;
+                }
+            }
+            return jsxElementType || anyType;
+        }
+        function isUnhyphenatedJsxName(name) {
+            return name.indexOf("-") < 0;
+        }
+        function isJsxIntrinsicIdentifier(tagName) {
+            if (tagName.kind === 139) {
+                return false;
+            }
+            else {
+                return ts.isIntrinsicJsxName(tagName.text);
+            }
+        }
+        function checkJsxAttribute(node, elementAttributesType, nameTable) {
+            var correspondingPropType = undefined;
+            if (elementAttributesType === emptyObjectType && isUnhyphenatedJsxName(node.name.text)) {
+                error(node.parent, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
+            }
+            else if (elementAttributesType && !isTypeAny(elementAttributesType)) {
+                var correspondingPropSymbol = getPropertyOfType(elementAttributesType, node.name.text);
+                correspondingPropType = correspondingPropSymbol && getTypeOfSymbol(correspondingPropSymbol);
+                if (isUnhyphenatedJsxName(node.name.text)) {
+                    var indexerType = getIndexTypeOfType(elementAttributesType, 0);
+                    if (indexerType) {
+                        correspondingPropType = indexerType;
+                    }
+                    else {
+                        if (!correspondingPropType) {
+                            error(node.name, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.name.text, typeToString(elementAttributesType));
+                            return unknownType;
+                        }
+                    }
+                }
+            }
+            var exprType;
+            if (node.initializer) {
+                exprType = checkExpression(node.initializer);
+            }
+            else {
+                exprType = booleanType;
+            }
+            if (correspondingPropType) {
+                checkTypeAssignableTo(exprType, correspondingPropType, node);
+            }
+            nameTable[node.name.text] = true;
+            return exprType;
+        }
+        function checkJsxSpreadAttribute(node, elementAttributesType, nameTable) {
+            var type = checkExpression(node.expression);
+            var props = getPropertiesOfType(type);
+            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
+                var prop = props_2[_i];
+                if (!nameTable[prop.name]) {
+                    var targetPropSym = getPropertyOfType(elementAttributesType, prop.name);
+                    if (targetPropSym) {
+                        var msg = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property, prop.name);
+                        checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(targetPropSym), node, undefined, msg);
+                    }
+                    nameTable[prop.name] = true;
+                }
+            }
+            return type;
+        }
+        function getJsxType(name) {
+            if (jsxTypes[name] === undefined) {
+                return jsxTypes[name] = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType;
+            }
+            return jsxTypes[name];
+        }
+        function getIntrinsicTagSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
+                if (intrinsicElementsType !== unknownType) {
+                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
+                    if (intrinsicProp) {
+                        links.jsxFlags |= 1;
+                        return links.resolvedSymbol = intrinsicProp;
+                    }
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0);
+                    if (indexSignatureType) {
+                        links.jsxFlags |= 2;
+                        return links.resolvedSymbol = intrinsicElementsType.symbol;
+                    }
+                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
+                    return links.resolvedSymbol = unknownSymbol;
+                }
+                else {
+                    if (compilerOptions.noImplicitAny) {
+                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
+                    }
+                    return links.resolvedSymbol = unknownSymbol;
+                }
+            }
+            return links.resolvedSymbol;
+        }
+        function getJsxElementInstanceType(node, valueType) {
+            ts.Debug.assert(!(valueType.flags & 16384));
+            if (isTypeAny(valueType)) {
+                return anyType;
+            }
+            var signatures = getSignaturesOfType(valueType, 1);
+            if (signatures.length === 0) {
+                signatures = getSignaturesOfType(valueType, 0);
+                if (signatures.length === 0) {
+                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
+                    return unknownType;
+                }
+            }
+            return getUnionType(signatures.map(getReturnTypeOfSignature));
+        }
+        function getJsxElementPropertiesName() {
+            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1536, undefined);
+            var attribsPropTypeSym = jsxNamespace && getSymbol(jsxNamespace.exports, JsxNames.ElementAttributesPropertyNameContainer, 793056);
+            var attribPropType = attribsPropTypeSym && getDeclaredTypeOfSymbol(attribsPropTypeSym);
+            var attribProperties = attribPropType && getPropertiesOfType(attribPropType);
+            if (attribProperties) {
+                if (attribProperties.length === 0) {
+                    return "";
+                }
+                else if (attribProperties.length === 1) {
+                    return attribProperties[0].name;
+                }
+                else {
+                    error(attribsPropTypeSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, JsxNames.ElementAttributesPropertyNameContainer);
+                    return undefined;
+                }
+            }
+            else {
+                return undefined;
+            }
+        }
+        function getResolvedJsxType(node, elemType, elemClassType) {
+            if (!elemType) {
+                elemType = checkExpression(node.tagName);
+            }
+            if (elemType.flags & 16384) {
+                var types = elemType.types;
+                return getUnionType(types.map(function (type) {
+                    return getResolvedJsxType(node, type, elemClassType);
+                }));
+            }
+            var elemInstanceType = getJsxElementInstanceType(node, elemType);
+            if (!elemClassType || !isTypeAssignableTo(elemInstanceType, elemClassType)) {
+                if (jsxElementType) {
+                    var callSignatures = elemType && getSignaturesOfType(elemType, 0);
+                    var callSignature = callSignatures && callSignatures.length > 0 && callSignatures[0];
+                    var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
+                    var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                    if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType)) {
+                        var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
+                        if (intrinsicAttributes !== unknownType) {
+                            paramType = intersectTypes(intrinsicAttributes, paramType);
+                        }
+                        return paramType;
+                    }
+                }
+            }
+            if (elemClassType) {
+                checkTypeRelatedTo(elemInstanceType, elemClassType, assignableRelation, node, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
+            }
+            if (isTypeAny(elemInstanceType)) {
+                return elemInstanceType;
+            }
+            var propsName = getJsxElementPropertiesName();
+            if (propsName === undefined) {
+                return anyType;
+            }
+            else if (propsName === "") {
+                return elemInstanceType;
+            }
+            else {
+                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
+                if (!attributesType) {
+                    return emptyObjectType;
+                }
+                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
+                    return attributesType;
+                }
+                else if (attributesType.flags & 16384) {
+                    error(node.tagName, ts.Diagnostics.JSX_element_attributes_type_0_may_not_be_a_union_type, typeToString(attributesType));
+                    return anyType;
+                }
+                else {
+                    var apparentAttributesType = attributesType;
+                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
+                    if (intrinsicClassAttribs !== unknownType) {
+                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
+                        if (typeParams) {
+                            if (typeParams.length === 1) {
+                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
+                            }
+                        }
+                        else {
+                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
+                        }
+                    }
+                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
+                    if (intrinsicAttribs !== unknownType) {
+                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
+                    }
+                    return apparentAttributesType;
+                }
+            }
+        }
+        function getJsxElementAttributesType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedJsxType) {
+                if (isJsxIntrinsicIdentifier(node.tagName)) {
+                    var symbol = getIntrinsicTagSymbol(node);
+                    if (links.jsxFlags & 1) {
+                        return links.resolvedJsxType = getTypeOfSymbol(symbol);
+                    }
+                    else if (links.jsxFlags & 2) {
+                        return links.resolvedJsxType = getIndexInfoOfSymbol(symbol, 0).type;
+                    }
+                    else {
+                        return links.resolvedJsxType = unknownType;
+                    }
+                }
+                else {
+                    var elemClassType = getJsxGlobalElementClassType();
+                    return links.resolvedJsxType = getResolvedJsxType(node, undefined, elemClassType);
+                }
+            }
+            return links.resolvedJsxType;
+        }
+        function getJsxAttributePropertySymbol(attrib) {
+            var attributesType = getJsxElementAttributesType(attrib.parent);
+            var prop = getPropertyOfType(attributesType, attrib.name.text);
+            return prop || unknownSymbol;
+        }
+        function getJsxGlobalElementClassType() {
+            if (!jsxElementClassType) {
+                jsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
+            }
+            return jsxElementClassType;
+        }
+        function getJsxIntrinsicTagNames() {
+            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
+            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
+        }
+        function checkJsxPreconditions(errorNode) {
+            if ((compilerOptions.jsx || 0) === 0) {
+                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
+            }
+            if (jsxElementType === undefined) {
+                if (compilerOptions.noImplicitAny) {
+                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
+                }
+            }
+        }
+        function checkJsxOpeningLikeElement(node) {
+            checkGrammarJsxElement(node);
+            checkJsxPreconditions(node);
+            var reactRefErr = compilerOptions.jsx === 2 ? ts.Diagnostics.Cannot_find_name_0 : undefined;
+            var reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
+            var reactSym = resolveName(node.tagName, reactNamespace, 107455, reactRefErr, reactNamespace);
+            if (reactSym) {
+                getSymbolLinks(reactSym).referenced = true;
+            }
+            var targetAttributesType = getJsxElementAttributesType(node);
+            var nameTable = {};
+            var sawSpreadedAny = false;
+            for (var i = node.attributes.length - 1; i >= 0; i--) {
+                if (node.attributes[i].kind === 246) {
+                    checkJsxAttribute((node.attributes[i]), targetAttributesType, nameTable);
+                }
+                else {
+                    ts.Debug.assert(node.attributes[i].kind === 247);
+                    var spreadType = checkJsxSpreadAttribute((node.attributes[i]), targetAttributesType, nameTable);
+                    if (isTypeAny(spreadType)) {
+                        sawSpreadedAny = true;
+                    }
+                }
+            }
+            if (targetAttributesType && !sawSpreadedAny) {
+                var targetProperties = getPropertiesOfType(targetAttributesType);
+                for (var i = 0; i < targetProperties.length; i++) {
+                    if (!(targetProperties[i].flags & 536870912) &&
+                        nameTable[targetProperties[i].name] === undefined) {
+                        error(node, ts.Diagnostics.Property_0_is_missing_in_type_1, targetProperties[i].name, typeToString(targetAttributesType));
+                    }
+                }
+            }
+        }
+        function checkJsxExpression(node) {
+            if (node.expression) {
+                return checkExpression(node.expression);
+            }
+            else {
+                return unknownType;
+            }
+        }
+        function getDeclarationKindFromSymbol(s) {
+            return s.valueDeclaration ? s.valueDeclaration.kind : 145;
+        }
+        function getDeclarationFlagsFromSymbol(s) {
+            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : s.flags & 134217728 ? 4 | 32 : 0;
+        }
+        function checkClassPropertyAccess(node, left, type, prop) {
+            var flags = getDeclarationFlagsFromSymbol(prop);
+            var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop));
+            var errorNode = node.kind === 172 || node.kind === 218 ?
+                node.name :
+                node.right;
+            if (left.kind === 95) {
+                if (languageVersion < 2 && getDeclarationKindFromSymbol(prop) !== 147) {
+                    error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
+                    return false;
+                }
+                if (flags & 128) {
+                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass));
+                    return false;
+                }
+            }
+            if (!(flags & (8 | 16))) {
+                return true;
+            }
+            if (flags & 8) {
+                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
+                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass));
+                    return false;
+                }
+                return true;
+            }
+            if (left.kind === 95) {
+                return true;
+            }
+            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
+                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
+                return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined;
+            });
+            if (!enclosingClass) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass));
+                return false;
+            }
+            if (flags & 32) {
+                return true;
+            }
+            if (type.flags & 33554432) {
+                type = getConstraintOfTypeParameter(type);
+            }
+            if (!(getTargetType(type).flags & (1024 | 2048) && hasBaseType(type, enclosingClass))) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
+                return false;
+            }
+            return true;
+        }
+        function checkNonNullExpression(node) {
+            var type = checkExpression(node);
+            if (strictNullChecks) {
+                var kind = getCombinedTypeFlags(type) & 96;
+                if (kind) {
+                    error(node, kind & 32 ? kind & 64 ?
+                        ts.Diagnostics.Object_is_possibly_null_or_undefined :
+                        ts.Diagnostics.Object_is_possibly_undefined :
+                        ts.Diagnostics.Object_is_possibly_null);
+                }
+                return getNonNullableType(type);
+            }
+            return type;
+        }
+        function checkPropertyAccessExpression(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
+        }
+        function checkQualifiedName(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
+        }
+        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
+            var type = checkNonNullExpression(left);
+            if (isTypeAny(type)) {
+                return type;
+            }
+            var apparentType = getApparentType(getWidenedType(type));
+            if (apparentType === unknownType || (type.flags & 512 && isTypeAny(apparentType))) {
+                return apparentType;
+            }
+            var prop = getPropertyOfType(apparentType, right.text);
+            if (!prop) {
+                if (right.text) {
+                    error(right, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(right), typeToString(type.flags & 33554432 ? apparentType : type));
+                }
+                return unknownType;
+            }
+            getNodeLinks(node).resolvedSymbol = prop;
+            if (prop.parent && prop.parent.flags & 32) {
+                checkClassPropertyAccess(node, left, apparentType, prop);
+            }
+            var propType = getTypeOfSymbol(prop);
+            if (node.kind !== 172 || ts.isAssignmentTarget(node) ||
+                !(prop.flags & (3 | 4 | 98304)) &&
+                    !(prop.flags & 8192 && propType.flags & 16384)) {
+                return propType;
+            }
+            return getFlowTypeOfReference(node, propType, true, false);
+        }
+        function isValidPropertyAccess(node, propertyName) {
+            var left = node.kind === 172
+                ? node.expression
+                : node.left;
+            var type = checkExpression(left);
+            if (type !== unknownType && !isTypeAny(type)) {
+                var prop = getPropertyOfType(getWidenedType(type), propertyName);
+                if (prop && prop.parent && prop.parent.flags & 32) {
+                    return checkClassPropertyAccess(node, left, type, prop);
+                }
+            }
+            return true;
+        }
+        function getForInVariableSymbol(node) {
+            var initializer = node.initializer;
+            if (initializer.kind === 219) {
+                var variable = initializer.declarations[0];
+                if (variable && !ts.isBindingPattern(variable.name)) {
+                    return getSymbolOfNode(variable);
+                }
+            }
+            else if (initializer.kind === 69) {
+                return getResolvedSymbol(initializer);
+            }
+            return undefined;
+        }
+        function hasNumericPropertyNames(type) {
+            return getIndexTypeOfType(type, 1) && !getIndexTypeOfType(type, 0);
+        }
+        function isForInVariableForNumericPropertyNames(expr) {
+            var e = skipParenthesizedNodes(expr);
+            if (e.kind === 69) {
+                var symbol = getResolvedSymbol(e);
+                if (symbol.flags & 3) {
+                    var child = expr;
+                    var node = expr.parent;
+                    while (node) {
+                        if (node.kind === 207 &&
+                            child === node.statement &&
+                            getForInVariableSymbol(node) === symbol &&
+                            hasNumericPropertyNames(checkExpression(node.expression))) {
+                            return true;
+                        }
+                        child = node;
+                        node = node.parent;
+                    }
+                }
+            }
+            return false;
+        }
+        function checkIndexedAccess(node) {
+            if (!node.argumentExpression) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                if (node.parent.kind === 175 && node.parent.expression === node) {
+                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
+                }
+                else {
+                    var start = node.end - "]".length;
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
+                }
+            }
+            var objectType = getApparentType(checkNonNullExpression(node.expression));
+            var indexType = node.argumentExpression ? checkExpression(node.argumentExpression) : unknownType;
+            if (objectType === unknownType) {
+                return unknownType;
+            }
+            var isConstEnum = isConstEnumObjectType(objectType);
+            if (isConstEnum &&
+                (!node.argumentExpression || node.argumentExpression.kind !== 9)) {
+                error(node.argumentExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
+                return unknownType;
+            }
+            if (node.argumentExpression) {
+                var name_13 = getPropertyNameForIndexedAccess(node.argumentExpression, indexType);
+                if (name_13 !== undefined) {
+                    var prop = getPropertyOfType(objectType, name_13);
+                    if (prop) {
+                        getNodeLinks(node).resolvedSymbol = prop;
+                        return getTypeOfSymbol(prop);
+                    }
+                    else if (isConstEnum) {
+                        error(node.argumentExpression, ts.Diagnostics.Property_0_does_not_exist_on_const_enum_1, name_13, symbolToString(objectType.symbol));
+                        return unknownType;
+                    }
+                }
+            }
+            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 258 | 132 | 16777216)) {
+                if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 132) || isForInVariableForNumericPropertyNames(node.argumentExpression)) {
+                    var numberIndexInfo = getIndexInfoOfType(objectType, 1);
+                    if (numberIndexInfo) {
+                        getNodeLinks(node).resolvedIndexInfo = numberIndexInfo;
+                        return numberIndexInfo.type;
+                    }
+                }
+                var stringIndexInfo = getIndexInfoOfType(objectType, 0);
+                if (stringIndexInfo) {
+                    getNodeLinks(node).resolvedIndexInfo = stringIndexInfo;
+                    return stringIndexInfo.type;
+                }
+                if (compilerOptions.noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors && !isTypeAny(objectType)) {
+                    error(node, getIndexTypeOfType(objectType, 1) ?
+                        ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number :
+                        ts.Diagnostics.Index_signature_of_object_type_implicitly_has_an_any_type);
+                }
+                return anyType;
+            }
+            error(node, ts.Diagnostics.An_index_expression_argument_must_be_of_type_string_number_symbol_or_any);
+            return unknownType;
+        }
+        function getPropertyNameForIndexedAccess(indexArgumentExpression, indexArgumentType) {
+            if (indexArgumentExpression.kind === 9 || indexArgumentExpression.kind === 8) {
+                return indexArgumentExpression.text;
+            }
+            if (indexArgumentExpression.kind === 173 || indexArgumentExpression.kind === 172) {
+                var value = getConstantValue(indexArgumentExpression);
+                if (value !== undefined) {
+                    return value.toString();
+                }
+            }
+            if (checkThatExpressionIsProperSymbolReference(indexArgumentExpression, indexArgumentType, false)) {
+                var rightHandSideName = indexArgumentExpression.name.text;
+                return ts.getPropertyNameForKnownSymbolName(rightHandSideName);
+            }
+            return undefined;
+        }
+        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
+            if (expressionType === unknownType) {
+                return false;
+            }
+            if (!ts.isWellKnownSymbolSyntactically(expression)) {
+                return false;
+            }
+            if ((expressionType.flags & 16777216) === 0) {
+                if (reportError) {
+                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
+                }
+                return false;
+            }
+            var leftHandSide = expression.expression;
+            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
+            if (!leftHandSideSymbol) {
+                return false;
+            }
+            var globalESSymbol = getGlobalESSymbolConstructorSymbol();
+            if (!globalESSymbol) {
+                return false;
+            }
+            if (leftHandSideSymbol !== globalESSymbol) {
+                if (reportError) {
+                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
+                }
+                return false;
+            }
+            return true;
+        }
+        function resolveUntypedCall(node) {
+            if (node.kind === 176) {
+                checkExpression(node.template);
+            }
+            else if (node.kind !== 143) {
+                ts.forEach(node.arguments, function (argument) {
+                    checkExpression(argument);
+                });
+            }
+            return anySignature;
+        }
+        function resolveErrorCall(node) {
+            resolveUntypedCall(node);
+            return unknownSignature;
+        }
+        function reorderCandidates(signatures, result) {
+            var lastParent;
+            var lastSymbol;
+            var cutoffIndex = 0;
+            var index;
+            var specializedIndex = -1;
+            var spliceIndex;
+            ts.Debug.assert(!result.length);
+            for (var _i = 0, signatures_2 = signatures; _i < signatures_2.length; _i++) {
+                var signature = signatures_2[_i];
+                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
+                var parent_9 = signature.declaration && signature.declaration.parent;
+                if (!lastSymbol || symbol === lastSymbol) {
+                    if (lastParent && parent_9 === lastParent) {
+                        index++;
+                    }
+                    else {
+                        lastParent = parent_9;
+                        index = cutoffIndex;
+                    }
+                }
+                else {
+                    index = cutoffIndex = result.length;
+                    lastParent = parent_9;
+                }
+                lastSymbol = symbol;
+                if (signature.hasStringLiterals) {
+                    specializedIndex++;
+                    spliceIndex = specializedIndex;
+                    cutoffIndex++;
+                }
+                else {
+                    spliceIndex = index;
+                }
+                result.splice(spliceIndex, 0, signature);
+            }
+        }
+        function getSpreadArgumentIndex(args) {
+            for (var i = 0; i < args.length; i++) {
+                var arg = args[i];
+                if (arg && arg.kind === 191) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+        function hasCorrectArity(node, args, signature, signatureHelpTrailingComma) {
+            if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+            var argCount;
+            var typeArguments;
+            var callIsIncomplete;
+            var isDecorator;
+            var spreadArgIndex = -1;
+            if (node.kind === 176) {
+                var tagExpression = node;
+                argCount = args.length;
+                typeArguments = undefined;
+                if (tagExpression.template.kind === 189) {
+                    var templateExpression = tagExpression.template;
+                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
+                    ts.Debug.assert(lastSpan !== undefined);
+                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
+                }
+                else {
+                    var templateLiteral = tagExpression.template;
+                    ts.Debug.assert(templateLiteral.kind === 11);
+                    callIsIncomplete = !!templateLiteral.isUnterminated;
+                }
+            }
+            else if (node.kind === 143) {
+                isDecorator = true;
+                typeArguments = undefined;
+                argCount = getEffectiveArgumentCount(node, undefined, signature);
+            }
+            else {
+                var callExpression = node;
+                if (!callExpression.arguments) {
+                    ts.Debug.assert(callExpression.kind === 175);
+                    return signature.minArgumentCount === 0;
+                }
+                argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
+                callIsIncomplete = callExpression.arguments.end === callExpression.end;
+                typeArguments = callExpression.typeArguments;
+                spreadArgIndex = getSpreadArgumentIndex(args);
+            }
+            var hasRightNumberOfTypeArgs = !typeArguments ||
+                (signature.typeParameters && typeArguments.length === signature.typeParameters.length);
+            if (!hasRightNumberOfTypeArgs) {
+                return false;
+            }
+            if (spreadArgIndex >= 0) {
+                return isRestParameterIndex(signature, spreadArgIndex);
+            }
+            if (!signature.hasRestParameter && argCount > signature.parameters.length) {
+                return false;
+            }
+            var hasEnoughArguments = argCount >= signature.minArgumentCount;
+            return callIsIncomplete || hasEnoughArguments;
+        }
+        function getSingleCallSignature(type) {
+            if (type.flags & 80896) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
+                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                    return resolved.callSignatures[0];
+                }
+            }
+            return undefined;
+        }
+        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
+            var context = createInferenceContext(signature.typeParameters, true);
+            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
+                inferTypes(context, instantiateType(source, contextualMapper), target);
+            });
+            return getSignatureInstantiation(signature, getInferredTypes(context));
+        }
+        function inferTypeArguments(node, signature, args, excludeArgument, context) {
+            var typeParameters = signature.typeParameters;
+            var inferenceMapper = getInferenceMapper(context);
+            for (var i = 0; i < typeParameters.length; i++) {
+                if (!context.inferences[i].isFixed) {
+                    context.inferredTypes[i] = undefined;
+                }
+            }
+            if (context.failedTypeParameterIndex !== undefined && !context.inferences[context.failedTypeParameterIndex].isFixed) {
+                context.failedTypeParameterIndex = undefined;
+            }
+            if (signature.thisType) {
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                inferTypes(context, thisArgumentType, signature.thisType);
+            }
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                if (arg === undefined || arg.kind !== 193) {
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i, arg);
+                    if (argType === undefined) {
+                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : inferenceMapper;
+                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
+                    }
+                    inferTypes(context, argType, paramType);
+                }
+            }
+            if (excludeArgument) {
+                for (var i = 0; i < argCount; i++) {
+                    if (excludeArgument[i] === false) {
+                        var arg = args[i];
+                        var paramType = getTypeAtPosition(signature, i);
+                        inferTypes(context, checkExpressionWithContextualType(arg, paramType, inferenceMapper), paramType);
+                    }
+                }
+            }
+            getInferredTypes(context);
+        }
+        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
+            var typeParameters = signature.typeParameters;
+            var typeArgumentsAreAssignable = true;
+            var mapper;
+            for (var i = 0; i < typeParameters.length; i++) {
+                if (typeArgumentsAreAssignable) {
+                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                    if (constraint) {
+                        var errorInfo = void 0;
+                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
+                        if (reportErrors && headMessage) {
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
+                            typeArgumentHeadMessage = headMessage;
+                        }
+                        if (!mapper) {
+                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
+                        }
+                        var typeArgument = typeArgumentTypes[i];
+                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
+                    }
+                }
+            }
+            return typeArgumentsAreAssignable;
+        }
+        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
+            if (signature.thisType && signature.thisType !== voidType && node.kind !== 175) {
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
+                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
+                if (!checkTypeRelatedTo(thisArgumentType, signature.thisType, relation, errorNode, headMessage_1)) {
+                    return false;
+                }
+            }
+            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                if (arg === undefined || arg.kind !== 193) {
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i, arg);
+                    if (argType === undefined) {
+                        argType = arg.kind === 9 && !reportErrors
+                            ? getStringLiteralTypeForText(arg.text)
+                            : checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
+                    }
+                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
+                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function getThisArgumentOfCall(node) {
+            if (node.kind === 174) {
+                var callee = node.expression;
+                if (callee.kind === 172) {
+                    return callee.expression;
+                }
+                else if (callee.kind === 173) {
+                    return callee.expression;
+                }
+            }
+        }
+        function getEffectiveCallArguments(node) {
+            var args;
+            if (node.kind === 176) {
+                var template = node.template;
+                args = [undefined];
+                if (template.kind === 189) {
+                    ts.forEach(template.templateSpans, function (span) {
+                        args.push(span.expression);
+                    });
+                }
+            }
+            else if (node.kind === 143) {
+                return undefined;
+            }
+            else {
+                args = node.arguments || emptyArray;
+            }
+            return args;
+        }
+        function getEffectiveArgumentCount(node, args, signature) {
+            if (node.kind === 143) {
+                switch (node.parent.kind) {
+                    case 221:
+                    case 192:
+                        return 1;
+                    case 145:
+                        return 2;
+                    case 147:
+                    case 149:
+                    case 150:
+                        if (languageVersion === 0) {
+                            return 2;
+                        }
+                        return signature.parameters.length >= 3 ? 3 : 2;
+                    case 142:
+                        return 3;
+                }
+            }
+            else {
+                return args.length;
+            }
+        }
+        function getEffectiveDecoratorFirstArgumentType(node) {
+            if (node.kind === 221) {
+                var classSymbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(classSymbol);
+            }
+            if (node.kind === 142) {
+                node = node.parent;
+                if (node.kind === 148) {
+                    var classSymbol = getSymbolOfNode(node);
+                    return getTypeOfSymbol(classSymbol);
+                }
+            }
+            if (node.kind === 145 ||
+                node.kind === 147 ||
+                node.kind === 149 ||
+                node.kind === 150) {
+                return getParentTypeOfClassElement(node);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        function getEffectiveDecoratorSecondArgumentType(node) {
+            if (node.kind === 221) {
+                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 142) {
+                node = node.parent;
+                if (node.kind === 148) {
+                    return anyType;
+                }
+            }
+            if (node.kind === 145 ||
+                node.kind === 147 ||
+                node.kind === 149 ||
+                node.kind === 150) {
+                var element = node;
+                switch (element.name.kind) {
+                    case 69:
+                    case 8:
+                    case 9:
+                        return getStringLiteralTypeForText(element.name.text);
+                    case 140:
+                        var nameType = checkComputedPropertyName(element.name);
+                        if (isTypeOfKind(nameType, 16777216)) {
+                            return nameType;
+                        }
+                        else {
+                            return stringType;
+                        }
+                    default:
+                        ts.Debug.fail("Unsupported property name.");
+                        return unknownType;
+                }
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        function getEffectiveDecoratorThirdArgumentType(node) {
+            if (node.kind === 221) {
+                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 142) {
+                return numberType;
+            }
+            if (node.kind === 145) {
+                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 147 ||
+                node.kind === 149 ||
+                node.kind === 150) {
+                var propertyType = getTypeOfNode(node);
+                return createTypedPropertyDescriptorType(propertyType);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        function getEffectiveDecoratorArgumentType(node, argIndex) {
+            if (argIndex === 0) {
+                return getEffectiveDecoratorFirstArgumentType(node.parent);
+            }
+            else if (argIndex === 1) {
+                return getEffectiveDecoratorSecondArgumentType(node.parent);
+            }
+            else if (argIndex === 2) {
+                return getEffectiveDecoratorThirdArgumentType(node.parent);
+            }
+            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
+            return unknownType;
+        }
+        function getEffectiveArgumentType(node, argIndex, arg) {
+            if (node.kind === 143) {
+                return getEffectiveDecoratorArgumentType(node, argIndex);
+            }
+            else if (argIndex === 0 && node.kind === 176) {
+                return getGlobalTemplateStringsArrayType();
+            }
+            return undefined;
+        }
+        function getEffectiveArgument(node, args, argIndex) {
+            if (node.kind === 143 ||
+                (argIndex === 0 && node.kind === 176)) {
+                return undefined;
+            }
+            return args[argIndex];
+        }
+        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
+            if (node.kind === 143) {
+                return node.expression;
+            }
+            else if (argIndex === 0 && node.kind === 176) {
+                return node.template;
+            }
+            else {
+                return arg;
+            }
+        }
+        function resolveCall(node, signatures, candidatesOutArray, headMessage) {
+            var isTaggedTemplate = node.kind === 176;
+            var isDecorator = node.kind === 143;
+            var typeArguments;
+            if (!isTaggedTemplate && !isDecorator) {
+                typeArguments = node.typeArguments;
+                if (node.expression.kind !== 95) {
+                    ts.forEach(typeArguments, checkSourceElement);
+                }
+            }
+            var candidates = candidatesOutArray || [];
+            reorderCandidates(signatures, candidates);
+            if (!candidates.length) {
+                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+                return resolveErrorCall(node);
+            }
+            var args = getEffectiveCallArguments(node);
+            var excludeArgument;
+            if (!isDecorator) {
+                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
+                    if (isContextSensitive(args[i])) {
+                        if (!excludeArgument) {
+                            excludeArgument = new Array(args.length);
+                        }
+                        excludeArgument[i] = true;
+                    }
+                }
+            }
+            var candidateForArgumentError;
+            var candidateForTypeArgumentError;
+            var resultOfFailedInference;
+            var result;
+            var signatureHelpTrailingComma = candidatesOutArray && node.kind === 174 && node.arguments.hasTrailingComma;
+            if (candidates.length > 1) {
+                result = chooseOverload(candidates, subtypeRelation, signatureHelpTrailingComma);
+            }
+            if (!result) {
+                candidateForArgumentError = undefined;
+                candidateForTypeArgumentError = undefined;
+                resultOfFailedInference = undefined;
+                result = chooseOverload(candidates, assignableRelation, signatureHelpTrailingComma);
+            }
+            if (result) {
+                return result;
+            }
+            if (candidateForArgumentError) {
+                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, undefined, true);
+            }
+            else if (candidateForTypeArgumentError) {
+                if (!isTaggedTemplate && !isDecorator && typeArguments) {
+                    var typeArguments_2 = node.typeArguments;
+                    checkTypeArguments(candidateForTypeArgumentError, typeArguments_2, ts.map(typeArguments_2, getTypeFromTypeNode), true, headMessage);
+                }
+                else {
+                    ts.Debug.assert(resultOfFailedInference.failedTypeParameterIndex >= 0);
+                    var failedTypeParameter = candidateForTypeArgumentError.typeParameters[resultOfFailedInference.failedTypeParameterIndex];
+                    var inferenceCandidates = getInferenceCandidates(resultOfFailedInference, resultOfFailedInference.failedTypeParameterIndex);
+                    var diagnosticChainHead = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly, typeToString(failedTypeParameter));
+                    if (headMessage) {
+                        diagnosticChainHead = ts.chainDiagnosticMessages(diagnosticChainHead, headMessage);
+                    }
+                    reportNoCommonSupertypeError(inferenceCandidates, node.expression || node.tag, diagnosticChainHead);
+                }
+            }
+            else {
+                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+            }
+            if (!produceDiagnostics) {
+                for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
+                    var candidate = candidates_1[_i];
+                    if (hasCorrectArity(node, args, candidate)) {
+                        if (candidate.typeParameters && typeArguments) {
+                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNode));
+                        }
+                        return candidate;
+                    }
+                }
+            }
+            return resolveErrorCall(node);
+            function reportError(message, arg0, arg1, arg2) {
+                var errorInfo;
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+                if (headMessage) {
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
+                }
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+            }
+            function chooseOverload(candidates, relation, signatureHelpTrailingComma) {
+                if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
+                    var originalCandidate = candidates_2[_i];
+                    if (!hasCorrectArity(node, args, originalCandidate, signatureHelpTrailingComma)) {
+                        continue;
+                    }
+                    var candidate = void 0;
+                    var typeArgumentsAreValid = void 0;
+                    var inferenceContext = originalCandidate.typeParameters
+                        ? createInferenceContext(originalCandidate.typeParameters, false)
+                        : undefined;
+                    while (true) {
+                        candidate = originalCandidate;
+                        if (candidate.typeParameters) {
+                            var typeArgumentTypes = void 0;
+                            if (typeArguments) {
+                                typeArgumentTypes = ts.map(typeArguments, getTypeFromTypeNode);
+                                typeArgumentsAreValid = checkTypeArguments(candidate, typeArguments, typeArgumentTypes, false);
+                            }
+                            else {
+                                inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
+                                typeArgumentsAreValid = inferenceContext.failedTypeParameterIndex === undefined;
+                                typeArgumentTypes = inferenceContext.inferredTypes;
+                            }
+                            if (!typeArgumentsAreValid) {
+                                break;
+                            }
+                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
+                        }
+                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, false)) {
+                            break;
+                        }
+                        var index = excludeArgument ? ts.indexOf(excludeArgument, true) : -1;
+                        if (index < 0) {
+                            return candidate;
+                        }
+                        excludeArgument[index] = false;
+                    }
+                    if (originalCandidate.typeParameters) {
+                        var instantiatedCandidate = candidate;
+                        if (typeArgumentsAreValid) {
+                            candidateForArgumentError = instantiatedCandidate;
+                        }
+                        else {
+                            candidateForTypeArgumentError = originalCandidate;
+                            if (!typeArguments) {
+                                resultOfFailedInference = inferenceContext;
+                            }
+                        }
+                    }
+                    else {
+                        ts.Debug.assert(originalCandidate === candidate);
+                        candidateForArgumentError = originalCandidate;
+                    }
+                }
+                return undefined;
+            }
+        }
+        function resolveCallExpression(node, candidatesOutArray) {
+            if (node.expression.kind === 95) {
+                var superType = checkSuperExpression(node.expression);
+                if (superType !== unknownType) {
+                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
+                    if (baseTypeNode) {
+                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments);
+                        return resolveCall(node, baseConstructors, candidatesOutArray);
+                    }
+                }
+                return resolveUntypedCall(node);
+            }
+            var funcType = checkNonNullExpression(node.expression);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0);
+            var constructSignatures = getSignaturesOfType(apparentType, 1);
+            if (isTypeAny(funcType) ||
+                (isTypeAny(apparentType) && funcType.flags & 512) ||
+                (!callSignatures.length && !constructSignatures.length && !(funcType.flags & 16384) && isTypeAssignableTo(funcType, globalFunctionType))) {
+                if (funcType !== unknownType && node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+                }
+                return resolveUntypedCall(node);
+            }
+            if (!callSignatures.length) {
+                if (constructSignatures.length) {
+                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
+                }
+                else {
+                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                }
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray);
+        }
+        function resolveNewExpression(node, candidatesOutArray) {
+            if (node.arguments && languageVersion < 1) {
+                var spreadIndex = getSpreadArgumentIndex(node.arguments);
+                if (spreadIndex >= 0) {
+                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
+                }
+            }
+            var expressionType = checkNonNullExpression(node.expression);
+            expressionType = getApparentType(expressionType);
+            if (expressionType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
+            if (valueDecl && valueDecl.flags & 128) {
+                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
+                return resolveErrorCall(node);
+            }
+            if (isTypeAny(expressionType)) {
+                if (node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+                }
+                return resolveUntypedCall(node);
+            }
+            var constructSignatures = getSignaturesOfType(expressionType, 1);
+            if (constructSignatures.length) {
+                if (!isConstructorAccessible(node, constructSignatures[0])) {
+                    return resolveErrorCall(node);
+                }
+                return resolveCall(node, constructSignatures, candidatesOutArray);
+            }
+            var callSignatures = getSignaturesOfType(expressionType, 0);
+            if (callSignatures.length) {
+                var signature = resolveCall(node, callSignatures, candidatesOutArray);
+                if (getReturnTypeOfSignature(signature) !== voidType) {
+                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
+                }
+                if (signature.thisType === voidType) {
+                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
+                }
+                return signature;
+            }
+            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
+            return resolveErrorCall(node);
+        }
+        function isConstructorAccessible(node, signature) {
+            if (!signature || !signature.declaration) {
+                return true;
+            }
+            var declaration = signature.declaration;
+            var flags = declaration.flags;
+            if (!(flags & (8 | 16))) {
+                return true;
+            }
+            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
+            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
+            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                if (flags & 8) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                if (flags & 16) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                return false;
+            }
+            return true;
+        }
+        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
+            var tagType = checkExpression(node.tag);
+            var apparentType = getApparentType(tagType);
+            if (apparentType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0);
+            if (isTypeAny(tagType) || (!callSignatures.length && !(tagType.flags & 16384) && isTypeAssignableTo(tagType, globalFunctionType))) {
+                return resolveUntypedCall(node);
+            }
+            if (!callSignatures.length) {
+                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray);
+        }
+        function getDiagnosticHeadMessageForDecoratorResolution(node) {
+            switch (node.parent.kind) {
+                case 221:
+                case 192:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
+                case 142:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
+                case 145:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
+                case 147:
+                case 149:
+                case 150:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
+            }
+        }
+        function resolveDecorator(node, candidatesOutArray) {
+            var funcType = checkExpression(node.expression);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0);
+            if (funcType === anyType || (!callSignatures.length && !(funcType.flags & 16384) && isTypeAssignableTo(funcType, globalFunctionType))) {
+                return resolveUntypedCall(node);
+            }
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            if (!callSignatures.length) {
+                var errorInfo = void 0;
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
+        }
+        function resolveSignature(node, candidatesOutArray) {
+            switch (node.kind) {
+                case 174:
+                    return resolveCallExpression(node, candidatesOutArray);
+                case 175:
+                    return resolveNewExpression(node, candidatesOutArray);
+                case 176:
+                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
+                case 143:
+                    return resolveDecorator(node, candidatesOutArray);
+            }
+            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
+        }
+        function getResolvedSignature(node, candidatesOutArray) {
+            var links = getNodeLinks(node);
+            var cached = links.resolvedSignature;
+            if (cached && cached !== anySignature && !candidatesOutArray) {
+                return cached;
+            }
+            links.resolvedSignature = anySignature;
+            var result = resolveSignature(node, candidatesOutArray);
+            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
+            return result;
+        }
+        function getResolvedOrAnySignature(node) {
+            return getNodeLinks(node).resolvedSignature === anySignature ? anySignature : getResolvedSignature(node);
+        }
+        function getInferredClassType(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.inferredClassType) {
+                links.inferredClassType = createAnonymousType(undefined, symbol.members, emptyArray, emptyArray, undefined, undefined);
+            }
+            return links.inferredClassType;
+        }
+        function checkCallExpression(node) {
+            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
+            var signature = getResolvedSignature(node);
+            if (node.expression.kind === 95) {
+                return voidType;
+            }
+            if (node.kind === 175) {
+                var declaration = signature.declaration;
+                if (declaration &&
+                    declaration.kind !== 148 &&
+                    declaration.kind !== 152 &&
+                    declaration.kind !== 157 &&
+                    !ts.isJSDocConstructSignature(declaration)) {
+                    var funcSymbol = checkExpression(node.expression).symbol;
+                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16)) {
+                        return getInferredClassType(funcSymbol);
+                    }
+                    else if (compilerOptions.noImplicitAny) {
+                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
+                    }
+                    return anyType;
+                }
+            }
+            if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, true)) {
+                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
+            }
+            return getReturnTypeOfSignature(signature);
+        }
+        function checkTaggedTemplateExpression(node) {
+            return getReturnTypeOfSignature(getResolvedSignature(node));
+        }
+        function checkAssertion(node) {
+            var exprType = getRegularTypeOfObjectLiteral(checkExpression(node.expression));
+            var targetType = getTypeFromTypeNode(node.type);
+            if (produceDiagnostics && targetType !== unknownType) {
+                var widenedType = getWidenedType(exprType);
+                if (!isTypeComparableTo(targetType, widenedType)) {
+                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
+                }
+            }
+            return targetType;
+        }
+        function checkNonNullAssertion(node) {
+            return getNonNullableType(checkExpression(node.expression));
+        }
+        function getTypeOfParameter(symbol) {
+            var type = getTypeOfSymbol(symbol);
+            if (strictNullChecks) {
+                var declaration = symbol.valueDeclaration;
+                if (declaration && declaration.initializer) {
+                    return addTypeKind(type, 32);
+                }
+            }
+            return type;
+        }
+        function getTypeAtPosition(signature, pos) {
+            return signature.hasRestParameter ?
+                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
+                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
+        }
+        function assignContextualParameterTypes(signature, context, mapper) {
+            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            for (var i = 0; i < len; i++) {
+                var parameter = signature.parameters[i];
+                var contextualParameterType = getTypeAtPosition(context, i);
+                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            }
+            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
+                var parameter = ts.lastOrUndefined(signature.parameters);
+                var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
+                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            }
+        }
+        function assignBindingElementTypes(node) {
+            if (ts.isBindingPattern(node.name)) {
+                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (element.kind !== 193) {
+                        if (element.name.kind === 69) {
+                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
+                        }
+                        assignBindingElementTypes(element);
+                    }
+                }
+            }
+        }
+        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType, mapper) {
+            var links = getSymbolLinks(parameter);
+            if (!links.type) {
+                links.type = instantiateType(contextualType, mapper);
+                if (links.type === emptyObjectType &&
+                    (parameter.valueDeclaration.name.kind === 167 ||
+                        parameter.valueDeclaration.name.kind === 168)) {
+                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
+                }
+                assignBindingElementTypes(parameter.valueDeclaration);
+            }
+            else if (isInferentialContext(mapper)) {
+                inferTypes(mapper.context, links.type, instantiateType(contextualType, mapper));
+            }
+        }
+        function getReturnTypeFromJSDocComment(func) {
+            var returnTag = ts.getJSDocReturnTag(func);
+            if (returnTag && returnTag.typeExpression) {
+                return getTypeFromTypeNode(returnTag.typeExpression.type);
+            }
+            return undefined;
+        }
+        function createPromiseType(promisedType) {
+            var globalPromiseType = getGlobalPromiseType();
+            if (globalPromiseType !== emptyGenericType) {
+                promisedType = getAwaitedType(promisedType);
+                return createTypeReference(globalPromiseType, [promisedType]);
+            }
+            return emptyObjectType;
+        }
+        function getReturnTypeFromBody(func, contextualMapper) {
+            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
+            if (!func.body) {
+                return unknownType;
+            }
+            var isAsync = ts.isAsyncFunctionLike(func);
+            var type;
+            if (func.body.kind !== 199) {
+                type = checkExpressionCached(func.body, contextualMapper);
+                if (isAsync) {
+                    type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                }
+            }
+            else {
+                var types = void 0;
+                var funcIsGenerator = !!func.asteriskToken;
+                if (funcIsGenerator) {
+                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
+                    if (types.length === 0) {
+                        var iterableIteratorAny = createIterableIteratorType(anyType);
+                        if (compilerOptions.noImplicitAny) {
+                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
+                        }
+                        return iterableIteratorAny;
+                    }
+                }
+                else {
+                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
+                    if (!types) {
+                        return neverType;
+                    }
+                    if (types.length === 0) {
+                        if (isAsync) {
+                            var promiseType = createPromiseType(voidType);
+                            if (promiseType === emptyObjectType) {
+                                error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+                                return unknownType;
+                            }
+                            return promiseType;
+                        }
+                        return voidType;
+                    }
+                }
+                type = contextualSignature ? getUnionType(types) : getCommonSupertype(types);
+                if (!type) {
+                    if (funcIsGenerator) {
+                        error(func, ts.Diagnostics.No_best_common_type_exists_among_yield_expressions);
+                        return createIterableIteratorType(unknownType);
+                    }
+                    else {
+                        error(func, ts.Diagnostics.No_best_common_type_exists_among_return_expressions);
+                        return getUnionType(types);
+                    }
+                }
+                if (funcIsGenerator) {
+                    type = createIterableIteratorType(type);
+                }
+            }
+            if (!contextualSignature) {
+                reportErrorsFromWidening(func, type);
+            }
+            var widenedType = getWidenedType(type);
+            if (isAsync) {
+                var promiseType = createPromiseType(widenedType);
+                if (promiseType === emptyObjectType) {
+                    error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+                    return unknownType;
+                }
+                return promiseType;
+            }
+            else {
+                return widenedType;
+            }
+        }
+        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
+            var aggregatedTypes = [];
+            ts.forEachYieldExpression(func.body, function (yieldExpression) {
+                var expr = yieldExpression.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, contextualMapper);
+                    if (yieldExpression.asteriskToken) {
+                        type = checkElementTypeOfIterable(type, yieldExpression.expression);
+                    }
+                    if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
+                    }
+                }
+            });
+            return aggregatedTypes;
+        }
+        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
+            var isAsync = ts.isAsyncFunctionLike(func);
+            var aggregatedTypes = [];
+            var hasReturnWithNoExpression = !!(func.flags & 32768);
+            var hasReturnOfTypeNever = false;
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
+                var expr = returnStatement.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, contextualMapper);
+                    if (isAsync) {
+                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                    }
+                    if (type === neverType) {
+                        hasReturnOfTypeNever = true;
+                    }
+                    else if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
+                    }
+                }
+                else {
+                    hasReturnWithNoExpression = true;
+                }
+            });
+            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
+                func.kind === 179 || func.kind === 180)) {
+                return undefined;
+            }
+            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
+                if (!ts.contains(aggregatedTypes, undefinedType)) {
+                    aggregatedTypes.push(undefinedType);
+                }
+            }
+            return aggregatedTypes;
+        }
+        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            if (returnType && maybeTypeOfKind(returnType, 1 | 16)) {
+                return;
+            }
+            if (ts.nodeIsMissing(func.body) || func.body.kind !== 199 || !(func.flags & 32768)) {
+                return;
+            }
+            var hasExplicitReturn = func.flags & 65536;
+            if (returnType === neverType) {
+                error(func.type, ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
+            }
+            else if (returnType && !hasExplicitReturn) {
+                error(func.type, ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
+            }
+            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
+                error(func.type, ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
+            }
+            else if (compilerOptions.noImplicitReturns) {
+                if (!returnType) {
+                    if (!hasExplicitReturn) {
+                        return;
+                    }
+                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
+                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
+                        return;
+                    }
+                }
+                error(func.type || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
+            }
+        }
+        function checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper) {
+            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
+            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
+            if (!hasGrammarError && node.kind === 179) {
+                checkGrammarForGenerator(node);
+            }
+            if (contextualMapper === identityMapper && isContextSensitive(node)) {
+                checkNodeDeferred(node);
+                return anyFunctionType;
+            }
+            var links = getNodeLinks(node);
+            var type = getTypeOfSymbol(node.symbol);
+            var contextSensitive = isContextSensitive(node);
+            var mightFixTypeParameters = contextSensitive && isInferentialContext(contextualMapper);
+            if (mightFixTypeParameters || !(links.flags & 1024)) {
+                var contextualSignature = getContextualSignature(node);
+                var contextChecked = !!(links.flags & 1024);
+                if (mightFixTypeParameters || !contextChecked) {
+                    links.flags |= 1024;
+                    if (contextualSignature) {
+                        var signature = getSignaturesOfType(type, 0)[0];
+                        if (contextSensitive) {
+                            assignContextualParameterTypes(signature, contextualSignature, contextualMapper || identityMapper);
+                        }
+                        if (mightFixTypeParameters || !node.type && !signature.resolvedReturnType) {
+                            var returnType = getReturnTypeFromBody(node, contextualMapper);
+                            if (!signature.resolvedReturnType) {
+                                signature.resolvedReturnType = returnType;
+                            }
+                        }
+                    }
+                    if (!contextChecked) {
+                        checkSignatureDeclaration(node);
+                        checkNodeDeferred(node);
+                    }
+                }
+            }
+            if (produceDiagnostics && node.kind !== 147 && node.kind !== 146) {
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+            }
+            return type;
+        }
+        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
+            ts.Debug.assert(node.kind !== 147 || ts.isObjectLiteralMethod(node));
+            var isAsync = ts.isAsyncFunctionLike(node);
+            var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
+            if (!node.asteriskToken) {
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (node.body) {
+                if (!node.type) {
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+                }
+                if (node.body.kind === 199) {
+                    checkSourceElement(node.body);
+                }
+                else {
+                    var exprType = checkExpression(node.body);
+                    if (returnOrPromisedType) {
+                        if (isAsync) {
+                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member);
+                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
+                        }
+                    }
+                }
+            }
+        }
+        function checkArithmeticOperandType(operand, type, diagnostic) {
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 132)) {
+                error(operand, diagnostic);
+                return false;
+            }
+            return true;
+        }
+        function isReadonlySymbol(symbol) {
+            return symbol.flags & 4 && (getDeclarationFlagsFromSymbol(symbol) & 64) !== 0 ||
+                symbol.flags & 3 && (getDeclarationFlagsFromSymbol(symbol) & 2048) !== 0 ||
+                symbol.flags & 98304 && !(symbol.flags & 65536) ||
+                (symbol.flags & 8) !== 0;
+        }
+        function isReferenceToReadonlyEntity(expr, symbol) {
+            if (isReadonlySymbol(symbol)) {
+                if (symbol.flags & 4 &&
+                    (expr.kind === 172 || expr.kind === 173) &&
+                    expr.expression.kind === 97) {
+                    var func = ts.getContainingFunction(expr);
+                    if (!(func && func.kind === 148))
+                        return true;
+                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
+                }
+                return true;
+            }
+            return false;
+        }
+        function isReferenceThroughNamespaceImport(expr) {
+            if (expr.kind === 172 || expr.kind === 173) {
+                var node = skipParenthesizedNodes(expr.expression);
+                if (node.kind === 69) {
+                    var symbol = getNodeLinks(node).resolvedSymbol;
+                    if (symbol.flags & 8388608) {
+                        var declaration = getDeclarationOfAliasSymbol(symbol);
+                        return declaration && declaration.kind === 232;
+                    }
+                }
+            }
+            return false;
+        }
+        function checkReferenceExpression(expr, invalidReferenceMessage, constantVariableMessage) {
+            var node = skipParenthesizedNodes(expr);
+            if (node.kind !== 69 && node.kind !== 172 && node.kind !== 173) {
+                error(expr, invalidReferenceMessage);
+                return false;
+            }
+            var links = getNodeLinks(node);
+            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
+            if (symbol) {
+                if (symbol !== unknownSymbol && symbol !== argumentsSymbol) {
+                    if (node.kind === 69 && !(symbol.flags & 3)) {
+                        error(expr, invalidReferenceMessage);
+                        return false;
+                    }
+                    if (isReferenceToReadonlyEntity(node, symbol) || isReferenceThroughNamespaceImport(node)) {
+                        error(expr, constantVariableMessage);
+                        return false;
+                    }
+                }
+            }
+            else if (node.kind === 173) {
+                if (links.resolvedIndexInfo && links.resolvedIndexInfo.isReadonly) {
+                    error(expr, constantVariableMessage);
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkDeleteExpression(node) {
+            checkExpression(node.expression);
+            return booleanType;
+        }
+        function checkTypeOfExpression(node) {
+            checkExpression(node.expression);
+            return stringType;
+        }
+        function checkVoidExpression(node) {
+            checkExpression(node.expression);
+            return undefinedWideningType;
+        }
+        function checkAwaitExpression(node) {
+            if (produceDiagnostics) {
+                if (!(node.flags & 33554432)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
+                }
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
+                }
+            }
+            var operandType = checkExpression(node.expression);
+            return checkAwaitedType(operandType, node);
+        }
+        function checkPrefixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            switch (node.operator) {
+                case 35:
+                case 36:
+                case 50:
+                    if (maybeTypeOfKind(operandType, 16777216)) {
+                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
+                    }
+                    return numberType;
+                case 49:
+                    return booleanType;
+                case 41:
+                case 42:
+                    var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+                    if (ok) {
+                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+                    }
+                    return numberType;
+            }
+            return unknownType;
+        }
+        function checkPostfixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+            if (ok) {
+                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+            }
+            return numberType;
+        }
+        function maybeTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
+            }
+            if (type.flags & 49152) {
+                var types = type.types;
+                for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
+                    var t = types_10[_i];
+                    if (maybeTypeOfKind(t, kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
+            }
+            if (type.flags & 16384) {
+                var types = type.types;
+                for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
+                    var t = types_11[_i];
+                    if (!isTypeOfKind(t, kind)) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            if (type.flags & 32768) {
+                var types = type.types;
+                for (var _a = 0, types_12 = types; _a < types_12.length; _a++) {
+                    var t = types_12[_a];
+                    if (isTypeOfKind(t, kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isConstEnumObjectType(type) {
+            return type.flags & (80896 | 65536) && type.symbol && isConstEnumSymbol(type.symbol);
+        }
+        function isConstEnumSymbol(symbol) {
+            return (symbol.flags & 128) !== 0;
+        }
+        function checkInstanceOfExpression(left, right, leftType, rightType) {
+            if (isTypeOfKind(leftType, 16777726)) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            if (!(isTypeAny(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
+            }
+            return booleanType;
+        }
+        function checkInExpression(left, right, leftType, rightType) {
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 | 132 | 16777216)) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
+            }
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 | 512)) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            return booleanType;
+        }
+        function checkObjectLiteralAssignment(node, sourceType, contextualMapper) {
+            var properties = node.properties;
+            for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
+                var p = properties_3[_i];
+                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, contextualMapper);
+            }
+            return sourceType;
+        }
+        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, contextualMapper) {
+            if (property.kind === 253 || property.kind === 254) {
+                var name_14 = property.name;
+                if (name_14.kind === 140) {
+                    checkComputedPropertyName(name_14);
+                }
+                if (isComputedNonLiteralName(name_14)) {
+                    return undefined;
+                }
+                var text = getTextOfPropertyName(name_14);
+                var type = isTypeAny(objectLiteralType)
+                    ? objectLiteralType
+                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
+                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1) ||
+                        getIndexTypeOfType(objectLiteralType, 0);
+                if (type) {
+                    if (property.kind === 254) {
+                        return checkDestructuringAssignment(property, type);
+                    }
+                    else {
+                        return checkDestructuringAssignment(property.initializer, type);
+                    }
+                }
+                else {
+                    error(name_14, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_14));
+                }
+            }
+            else {
+                error(property, ts.Diagnostics.Property_assignment_expected);
+            }
+        }
+        function checkArrayLiteralAssignment(node, sourceType, contextualMapper) {
+            var elementType = checkIteratedTypeOrElementType(sourceType, node, false) || unknownType;
+            var elements = node.elements;
+            for (var i = 0; i < elements.length; i++) {
+                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, contextualMapper);
+            }
+            return sourceType;
+        }
+        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, contextualMapper) {
+            var elements = node.elements;
+            var element = elements[elementIndex];
+            if (element.kind !== 193) {
+                if (element.kind !== 191) {
+                    var propName = "" + elementIndex;
+                    var type = isTypeAny(sourceType)
+                        ? sourceType
+                        : isTupleLikeType(sourceType)
+                            ? getTypeOfPropertyOfType(sourceType, propName)
+                            : elementType;
+                    if (type) {
+                        return checkDestructuringAssignment(element, type, contextualMapper);
+                    }
+                    else {
+                        if (isTupleType(sourceType)) {
+                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), sourceType.elementTypes.length, elements.length);
+                        }
+                        else {
+                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
+                        }
+                    }
+                }
+                else {
+                    if (elementIndex < elements.length - 1) {
+                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                    }
+                    else {
+                        var restExpression = element.expression;
+                        if (restExpression.kind === 187 && restExpression.operatorToken.kind === 56) {
+                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                        }
+                        else {
+                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), contextualMapper);
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function checkDestructuringAssignment(exprOrAssignment, sourceType, contextualMapper) {
+            var target;
+            if (exprOrAssignment.kind === 254) {
+                var prop = exprOrAssignment;
+                if (prop.objectAssignmentInitializer) {
+                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, contextualMapper);
+                }
+                target = exprOrAssignment.name;
+            }
+            else {
+                target = exprOrAssignment;
+            }
+            if (target.kind === 187 && target.operatorToken.kind === 56) {
+                checkBinaryExpression(target, contextualMapper);
+                target = target.left;
+            }
+            if (target.kind === 171) {
+                return checkObjectLiteralAssignment(target, sourceType, contextualMapper);
+            }
+            if (target.kind === 170) {
+                return checkArrayLiteralAssignment(target, sourceType, contextualMapper);
+            }
+            return checkReferenceAssignment(target, sourceType, contextualMapper);
+        }
+        function checkReferenceAssignment(target, sourceType, contextualMapper) {
+            var targetType = checkExpression(target, contextualMapper);
+            if (checkReferenceExpression(target, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property)) {
+                checkTypeAssignableTo(sourceType, targetType, target, undefined);
+            }
+            return sourceType;
+        }
+        function isTypeEqualityComparableTo(source, target) {
+            return (target.flags & 96) !== 0 || isTypeComparableTo(source, target);
+        }
+        function checkBinaryExpression(node, contextualMapper) {
+            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, contextualMapper, node);
+        }
+        function checkBinaryLikeExpression(left, operatorToken, right, contextualMapper, errorNode) {
+            var operator = operatorToken.kind;
+            if (operator === 56 && (left.kind === 171 || left.kind === 170)) {
+                return checkDestructuringAssignment(left, checkExpression(right, contextualMapper), contextualMapper);
+            }
+            var leftType = checkExpression(left, contextualMapper);
+            var rightType = checkExpression(right, contextualMapper);
+            switch (operator) {
+                case 37:
+                case 38:
+                case 59:
+                case 60:
+                case 39:
+                case 61:
+                case 40:
+                case 62:
+                case 36:
+                case 58:
+                case 43:
+                case 63:
+                case 44:
+                case 64:
+                case 45:
+                case 65:
+                case 47:
+                case 67:
+                case 48:
+                case 68:
+                case 46:
+                case 66:
+                    if (leftType.flags & 96)
+                        leftType = rightType;
+                    if (rightType.flags & 96)
+                        rightType = leftType;
+                    leftType = getNonNullableType(leftType);
+                    rightType = getNonNullableType(rightType);
+                    var suggestedOperator = void 0;
+                    if ((leftType.flags & 8) &&
+                        (rightType.flags & 8) &&
+                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
+                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
+                    }
+                    else {
+                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        if (leftOk && rightOk) {
+                            checkAssignmentOperator(numberType);
+                        }
+                    }
+                    return numberType;
+                case 35:
+                case 57:
+                    if (leftType.flags & 96)
+                        leftType = rightType;
+                    if (rightType.flags & 96)
+                        rightType = leftType;
+                    leftType = getNonNullableType(leftType);
+                    rightType = getNonNullableType(rightType);
+                    var resultType = void 0;
+                    if (isTypeOfKind(leftType, 132) && isTypeOfKind(rightType, 132)) {
+                        resultType = numberType;
+                    }
+                    else {
+                        if (isTypeOfKind(leftType, 258) || isTypeOfKind(rightType, 258)) {
+                            resultType = stringType;
+                        }
+                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
+                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
+                        }
+                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
+                            return resultType;
+                        }
+                    }
+                    if (!resultType) {
+                        reportOperatorError();
+                        return anyType;
+                    }
+                    if (operator === 57) {
+                        checkAssignmentOperator(resultType);
+                    }
+                    return resultType;
+                case 25:
+                case 27:
+                case 28:
+                case 29:
+                    if (checkForDisallowedESSymbolOperand(operator)) {
+                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
+                            reportOperatorError();
+                        }
+                    }
+                    return booleanType;
+                case 30:
+                case 31:
+                case 32:
+                case 33:
+                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
+                        reportOperatorError();
+                    }
+                    return booleanType;
+                case 91:
+                    return checkInstanceOfExpression(left, right, leftType, rightType);
+                case 90:
+                    return checkInExpression(left, right, leftType, rightType);
+                case 51:
+                    return strictNullChecks ? addTypeKind(rightType, getCombinedTypeFlags(leftType) & 126) : rightType;
+                case 52:
+                    return getUnionType([getNonNullableType(leftType), rightType]);
+                case 56:
+                    checkAssignmentOperator(rightType);
+                    return getRegularTypeOfObjectLiteral(rightType);
+                case 24:
+                    return rightType;
+            }
+            function checkForDisallowedESSymbolOperand(operator) {
+                var offendingSymbolOperand = maybeTypeOfKind(leftType, 16777216) ? left :
+                    maybeTypeOfKind(rightType, 16777216) ? right :
+                        undefined;
+                if (offendingSymbolOperand) {
+                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
+                    return false;
+                }
+                return true;
+            }
+            function getSuggestedBooleanOperator(operator) {
+                switch (operator) {
+                    case 47:
+                    case 67:
+                        return 52;
+                    case 48:
+                    case 68:
+                        return 33;
+                    case 46:
+                    case 66:
+                        return 51;
+                    default:
+                        return undefined;
+                }
+            }
+            function checkAssignmentOperator(valueType) {
+                if (produceDiagnostics && operator >= 56 && operator <= 68) {
+                    var ok = checkReferenceExpression(left, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property);
+                    if (ok) {
+                        checkTypeAssignableTo(valueType, leftType, left, undefined);
+                    }
+                }
+            }
+            function reportOperatorError() {
+                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
+            }
+        }
+        function isYieldExpressionInClass(node) {
+            var current = node;
+            var parent = node.parent;
+            while (parent) {
+                if (ts.isFunctionLike(parent) && current === parent.body) {
+                    return false;
+                }
+                else if (ts.isClassLike(current)) {
+                    return true;
+                }
+                current = parent;
+                parent = parent.parent;
+            }
+            return false;
+        }
+        function checkYieldExpression(node) {
+            if (produceDiagnostics) {
+                if (!(node.flags & 8388608) || isYieldExpressionInClass(node)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
+                }
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
+                }
+            }
+            if (node.expression) {
+                var func = ts.getContainingFunction(node);
+                if (func && func.asteriskToken) {
+                    var expressionType = checkExpressionCached(node.expression, undefined);
+                    var expressionElementType = void 0;
+                    var nodeIsYieldStar = !!node.asteriskToken;
+                    if (nodeIsYieldStar) {
+                        expressionElementType = checkElementTypeOfIterable(expressionType, node.expression);
+                    }
+                    if (func.type) {
+                        var signatureElementType = getElementTypeOfIterableIterator(getTypeFromTypeNode(func.type)) || anyType;
+                        if (nodeIsYieldStar) {
+                            checkTypeAssignableTo(expressionElementType, signatureElementType, node.expression, undefined);
+                        }
+                        else {
+                            checkTypeAssignableTo(expressionType, signatureElementType, node.expression, undefined);
+                        }
+                    }
+                }
+            }
+            return anyType;
+        }
+        function checkConditionalExpression(node, contextualMapper) {
+            checkExpression(node.condition);
+            var type1 = checkExpression(node.whenTrue, contextualMapper);
+            var type2 = checkExpression(node.whenFalse, contextualMapper);
+            return getUnionType([type1, type2]);
+        }
+        function checkStringLiteralExpression(node) {
+            var contextualType = getContextualType(node);
+            if (contextualType && contextualTypeIsStringLiteralType(contextualType)) {
+                return getStringLiteralTypeForText(node.text);
+            }
+            return stringType;
+        }
+        function checkTemplateExpression(node) {
+            ts.forEach(node.templateSpans, function (templateSpan) {
+                checkExpression(templateSpan.expression);
+            });
+            return stringType;
+        }
+        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
+            var saveContextualType = node.contextualType;
+            node.contextualType = contextualType;
+            var result = checkExpression(node, contextualMapper);
+            node.contextualType = saveContextualType;
+            return result;
+        }
+        function checkExpressionCached(node, contextualMapper) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var saveFlowLoopStart = flowLoopStart;
+                flowLoopStart = flowLoopCount;
+                links.resolvedType = checkExpression(node, contextualMapper);
+                flowLoopStart = saveFlowLoopStart;
+            }
+            return links.resolvedType;
+        }
+        function checkPropertyAssignment(node, contextualMapper) {
+            if (node.name.kind === 140) {
+                checkComputedPropertyName(node.name);
+            }
+            return checkExpression(node.initializer, contextualMapper);
+        }
+        function checkObjectLiteralMethod(node, contextualMapper) {
+            checkGrammarMethod(node);
+            if (node.name.kind === 140) {
+                checkComputedPropertyName(node.name);
+            }
+            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
+            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
+        }
+        function instantiateTypeWithSingleGenericCallSignature(node, type, contextualMapper) {
+            if (isInferentialContext(contextualMapper)) {
+                var signature = getSingleCallSignature(type);
+                if (signature && signature.typeParameters) {
+                    var contextualType = getApparentTypeOfContextualType(node);
+                    if (contextualType) {
+                        var contextualSignature = getSingleCallSignature(contextualType);
+                        if (contextualSignature && !contextualSignature.typeParameters) {
+                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper));
+                        }
+                    }
+                }
+            }
+            return type;
+        }
+        function checkExpression(node, contextualMapper) {
+            var type;
+            if (node.kind === 139) {
+                type = checkQualifiedName(node);
+            }
+            else {
+                var uninstantiatedType = checkExpressionWorker(node, contextualMapper);
+                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
+            }
+            if (isConstEnumObjectType(type)) {
+                var ok = (node.parent.kind === 172 && node.parent.expression === node) ||
+                    (node.parent.kind === 173 && node.parent.expression === node) ||
+                    ((node.kind === 69 || node.kind === 139) && isInRightSideOfImportOrExportAssignment(node));
+                if (!ok) {
+                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
+                }
+            }
+            return type;
+        }
+        function checkNumericLiteral(node) {
+            checkGrammarNumericLiteral(node);
+            return numberType;
+        }
+        function checkExpressionWorker(node, contextualMapper) {
+            switch (node.kind) {
+                case 69:
+                    return checkIdentifier(node);
+                case 97:
+                    return checkThisExpression(node);
+                case 95:
+                    return checkSuperExpression(node);
+                case 93:
+                    return nullWideningType;
+                case 99:
+                case 84:
+                    return booleanType;
+                case 8:
+                    return checkNumericLiteral(node);
+                case 189:
+                    return checkTemplateExpression(node);
+                case 9:
+                    return checkStringLiteralExpression(node);
+                case 11:
+                    return stringType;
+                case 10:
+                    return globalRegExpType;
+                case 170:
+                    return checkArrayLiteral(node, contextualMapper);
+                case 171:
+                    return checkObjectLiteral(node, contextualMapper);
+                case 172:
+                    return checkPropertyAccessExpression(node);
+                case 173:
+                    return checkIndexedAccess(node);
+                case 174:
+                case 175:
+                    return checkCallExpression(node);
+                case 176:
+                    return checkTaggedTemplateExpression(node);
+                case 178:
+                    return checkExpression(node.expression, contextualMapper);
+                case 192:
+                    return checkClassExpression(node);
+                case 179:
+                case 180:
+                    return checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
+                case 182:
+                    return checkTypeOfExpression(node);
+                case 177:
+                case 195:
+                    return checkAssertion(node);
+                case 196:
+                    return checkNonNullAssertion(node);
+                case 181:
+                    return checkDeleteExpression(node);
+                case 183:
+                    return checkVoidExpression(node);
+                case 184:
+                    return checkAwaitExpression(node);
+                case 185:
+                    return checkPrefixUnaryExpression(node);
+                case 186:
+                    return checkPostfixUnaryExpression(node);
+                case 187:
+                    return checkBinaryExpression(node, contextualMapper);
+                case 188:
+                    return checkConditionalExpression(node, contextualMapper);
+                case 191:
+                    return checkSpreadElementExpression(node, contextualMapper);
+                case 193:
+                    return undefinedWideningType;
+                case 190:
+                    return checkYieldExpression(node);
+                case 248:
+                    return checkJsxExpression(node);
+                case 241:
+                    return checkJsxElement(node);
+                case 242:
+                    return checkJsxSelfClosingElement(node);
+                case 243:
+                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
+            }
+            return unknownType;
+        }
+        function checkTypeParameter(node) {
+            if (node.expression) {
+                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
+            }
+            checkSourceElement(node.constraint);
+            getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node)));
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
+            }
+        }
+        function checkParameter(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkVariableLikeDeclaration(node);
+            var func = ts.getContainingFunction(node);
+            if (node.flags & 92) {
+                func = ts.getContainingFunction(node);
+                if (!(func.kind === 148 && ts.nodeIsPresent(func.body))) {
+                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
+                }
+            }
+            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
+                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
+            }
+            if (node.name.text === "this") {
+                if (ts.indexOf(func.parameters, node) !== 0) {
+                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
+                }
+                if (func.kind === 148 || func.kind === 152 || func.kind === 157) {
+                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
+                }
+            }
+            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
+                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
+            }
+        }
+        function isSyntacticallyValidGenerator(node) {
+            if (!node.asteriskToken || !node.body) {
+                return false;
+            }
+            return node.kind === 147 ||
+                node.kind === 220 ||
+                node.kind === 179;
+        }
+        function getTypePredicateParameterIndex(parameterList, parameter) {
+            if (parameterList) {
+                for (var i = 0; i < parameterList.length; i++) {
+                    var param = parameterList[i];
+                    if (param.name.kind === 69 &&
+                        param.name.text === parameter.text) {
+                        return i;
+                    }
+                }
+            }
+            return -1;
+        }
+        function checkTypePredicate(node) {
+            var parent = getTypePredicateParent(node);
+            if (!parent) {
+                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
+                return;
+            }
+            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
+            if (!typePredicate) {
+                return;
+            }
+            var parameterName = node.parameterName;
+            if (ts.isThisTypePredicate(typePredicate)) {
+                getTypeFromThisTypeNode(parameterName);
+            }
+            else {
+                if (typePredicate.parameterIndex >= 0) {
+                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
+                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
+                    }
+                    else {
+                        var leadingError = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
+                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, undefined, leadingError);
+                    }
+                }
+                else if (parameterName) {
+                    var hasReportedError = false;
+                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
+                        var name_15 = _a[_i].name;
+                        if (ts.isBindingPattern(name_15) &&
+                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_15, parameterName, typePredicate.parameterName)) {
+                            hasReportedError = true;
+                            break;
+                        }
+                    }
+                    if (!hasReportedError) {
+                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
+                    }
+                }
+            }
+        }
+        function getTypePredicateParent(node) {
+            switch (node.parent.kind) {
+                case 180:
+                case 151:
+                case 220:
+                case 179:
+                case 156:
+                case 147:
+                case 146:
+                    var parent_10 = node.parent;
+                    if (node === parent_10.type) {
+                        return parent_10;
+                    }
+            }
+        }
+        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
+            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
+                var name_16 = _a[_i].name;
+                if (name_16.kind === 69 &&
+                    name_16.text === predicateVariableName) {
+                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
+                    return true;
+                }
+                else if (name_16.kind === 168 ||
+                    name_16.kind === 167) {
+                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_16, predicateVariableNode, predicateVariableName)) {
+                        return true;
+                    }
+                }
+            }
+        }
+        function checkSignatureDeclaration(node) {
+            if (node.kind === 153) {
+                checkGrammarIndexSignature(node);
+            }
+            else if (node.kind === 156 || node.kind === 220 || node.kind === 157 ||
+                node.kind === 151 || node.kind === 148 ||
+                node.kind === 152) {
+                checkGrammarFunctionLikeDeclaration(node);
+            }
+            checkTypeParameters(node.typeParameters);
+            ts.forEach(node.parameters, checkParameter);
+            if (node.type) {
+                checkSourceElement(node.type);
+            }
+            if (produceDiagnostics) {
+                checkCollisionWithArgumentsInGeneratedCode(node);
+                if (compilerOptions.noImplicitAny && !node.type) {
+                    switch (node.kind) {
+                        case 152:
+                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                        case 151:
+                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                    }
+                }
+                if (node.type) {
+                    if (languageVersion >= 2 && isSyntacticallyValidGenerator(node)) {
+                        var returnType = getTypeFromTypeNode(node.type);
+                        if (returnType === voidType) {
+                            error(node.type, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
+                        }
+                        else {
+                            var generatorElementType = getElementTypeOfIterableIterator(returnType) || anyType;
+                            var iterableIteratorInstantiation = createIterableIteratorType(generatorElementType);
+                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, node.type);
+                        }
+                    }
+                    else if (ts.isAsyncFunctionLike(node)) {
+                        checkAsyncFunctionReturnType(node);
+                    }
+                }
+            }
+        }
+        function checkClassForDuplicateDeclarations(node) {
+            var getter = 1, setter = 2, property = getter | setter;
+            var instanceNames = {};
+            var staticNames = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 148) {
+                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                        var param = _c[_b];
+                        if (ts.isParameterPropertyDeclaration(param)) {
+                            addName(instanceNames, param.name, param.name.text, property);
+                        }
+                    }
+                }
+                else {
+                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113; });
+                    var names = static ? staticNames : instanceNames;
+                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
+                    if (memberName) {
+                        switch (member.kind) {
+                            case 149:
+                                addName(names, member.name, memberName, getter);
+                                break;
+                            case 150:
+                                addName(names, member.name, memberName, setter);
+                                break;
+                            case 145:
+                                addName(names, member.name, memberName, property);
+                                break;
+                        }
+                    }
+                }
+            }
+            function addName(names, location, name, meaning) {
+                if (ts.hasProperty(names, name)) {
+                    var prev = names[name];
+                    if (prev & meaning) {
+                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                    }
+                    else {
+                        names[name] = prev | meaning;
+                    }
+                }
+                else {
+                    names[name] = meaning;
+                }
+            }
+        }
+        function checkObjectTypeForDuplicateDeclarations(node) {
+            var names = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind == 144) {
+                    var memberName = void 0;
+                    switch (member.name.kind) {
+                        case 9:
+                        case 8:
+                        case 69:
+                            memberName = member.name.text;
+                            break;
+                        default:
+                            continue;
+                    }
+                    if (ts.hasProperty(names, memberName)) {
+                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                    }
+                    else {
+                        names[memberName] = true;
+                    }
+                }
+            }
+        }
+        function checkTypeForDuplicateIndexSignatures(node) {
+            if (node.kind === 222) {
+                var nodeSymbol = getSymbolOfNode(node);
+                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
+                    return;
+                }
+            }
+            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
+            if (indexSymbol) {
+                var seenNumericIndexer = false;
+                var seenStringIndexer = false;
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var declaration = decl;
+                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
+                        switch (declaration.parameters[0].type.kind) {
+                            case 132:
+                                if (!seenStringIndexer) {
+                                    seenStringIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
+                                }
+                                break;
+                            case 130:
+                                if (!seenNumericIndexer) {
+                                    seenNumericIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
+                                }
+                                break;
+                        }
+                    }
+                }
+            }
+        }
+        function checkPropertyDeclaration(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
+            checkVariableLikeDeclaration(node);
+        }
+        function checkMethodDeclaration(node) {
+            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
+            checkFunctionOrMethodDeclaration(node);
+            if (node.flags & 128 && node.body) {
+                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
+            }
+        }
+        function checkConstructorDeclaration(node) {
+            checkSignatureDeclaration(node);
+            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
+            checkSourceElement(node.body);
+            var symbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
+            if (node === firstDeclaration) {
+                checkFunctionOrConstructorSymbol(symbol);
+            }
+            if (ts.nodeIsMissing(node.body)) {
+                return;
+            }
+            if (!produceDiagnostics) {
+                return;
+            }
+            function containsSuperCallAsComputedPropertyName(n) {
+                return n.name && containsSuperCall(n.name);
+            }
+            function containsSuperCall(n) {
+                if (ts.isSuperCallExpression(n)) {
+                    return true;
+                }
+                else if (ts.isFunctionLike(n)) {
+                    return false;
+                }
+                else if (ts.isClassLike(n)) {
+                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
+                }
+                return ts.forEachChild(n, containsSuperCall);
+            }
+            function markThisReferencesAsErrors(n) {
+                if (n.kind === 97) {
+                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                }
+                else if (n.kind !== 179 && n.kind !== 220) {
+                    ts.forEachChild(n, markThisReferencesAsErrors);
+                }
+            }
+            function isInstancePropertyWithInitializer(n) {
+                return n.kind === 145 &&
+                    !(n.flags & 32) &&
+                    !!n.initializer;
+            }
+            var containingClassDecl = node.parent;
+            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
+                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
+                var superCall = getSuperCallInConstructor(node);
+                if (superCall) {
+                    if (classExtendsNull) {
+                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
+                    }
+                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
+                        ts.forEach(node.parameters, function (p) { return p.flags & 92; });
+                    if (superCallShouldBeFirst) {
+                        var statements = node.body.statements;
+                        var superCallStatement = void 0;
+                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
+                            var statement = statements_2[_i];
+                            if (statement.kind === 202 && ts.isSuperCallExpression(statement.expression)) {
+                                superCallStatement = statement;
+                                break;
+                            }
+                            if (!ts.isPrologueDirective(statement)) {
+                                break;
+                            }
+                        }
+                        if (!superCallStatement) {
+                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
+                        }
+                    }
+                }
+                else if (!classExtendsNull) {
+                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
+                }
+            }
+        }
+        function checkAccessorDeclaration(node) {
+            if (produceDiagnostics) {
+                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
+                checkDecorators(node);
+                checkSignatureDeclaration(node);
+                if (node.kind === 149) {
+                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 32768)) {
+                        if (node.flags & 65536) {
+                            if (compilerOptions.noImplicitReturns) {
+                                error(node.name, ts.Diagnostics.Not_all_code_paths_return_a_value);
+                            }
+                        }
+                        else {
+                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
+                        }
+                    }
+                }
+                if (node.name.kind === 140) {
+                    checkComputedPropertyName(node.name);
+                }
+                if (!ts.hasDynamicName(node)) {
+                    var otherKind = node.kind === 149 ? 150 : 149;
+                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
+                    if (otherAccessor) {
+                        if (((node.flags & 28) !== (otherAccessor.flags & 28))) {
+                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
+                        }
+                        if (((node.flags & 128) !== (otherAccessor.flags & 128))) {
+                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
+                        }
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorThisType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
+                    }
+                }
+                getTypeOfAccessors(getSymbolOfNode(node));
+            }
+            if (node.parent.kind !== 171) {
+                checkSourceElement(node.body);
+            }
+            else {
+                checkNodeDeferred(node);
+            }
+        }
+        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
+            var firstType = getAnnotatedType(first);
+            var secondType = getAnnotatedType(second);
+            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
+                error(first, message);
+            }
+        }
+        function checkAccessorDeferred(node) {
+            checkSourceElement(node.body);
+        }
+        function checkMissingDeclaration(node) {
+            checkDecorators(node);
+        }
+        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
+            var typeArguments;
+            var mapper;
+            var result = true;
+            for (var i = 0; i < typeParameters.length; i++) {
+                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                if (constraint) {
+                    if (!typeArguments) {
+                        typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
+                        mapper = createTypeMapper(typeParameters, typeArguments);
+                    }
+                    var typeArgument = typeArguments[i];
+                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
+                }
+            }
+            return result;
+        }
+        function checkTypeReferenceNode(node) {
+            checkGrammarTypeArguments(node, node.typeArguments);
+            var type = getTypeFromTypeReference(node);
+            if (type !== unknownType && node.typeArguments) {
+                ts.forEach(node.typeArguments, checkSourceElement);
+                if (produceDiagnostics) {
+                    var symbol = getNodeLinks(node).resolvedSymbol;
+                    var typeParameters = symbol.flags & 524288 ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
+                    checkTypeArgumentConstraints(typeParameters, node.typeArguments);
+                }
+            }
+        }
+        function checkTypeQuery(node) {
+            getTypeFromTypeQueryNode(node);
+        }
+        function checkTypeLiteral(node) {
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
+            }
+        }
+        function checkArrayType(node) {
+            checkSourceElement(node.elementType);
+        }
+        function checkTupleType(node) {
+            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
+            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
+                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
+            }
+            ts.forEach(node.elementTypes, checkSourceElement);
+        }
+        function checkUnionOrIntersectionType(node) {
+            ts.forEach(node.types, checkSourceElement);
+        }
+        function isPrivateWithinAmbient(node) {
+            return (node.flags & 8) && ts.isInAmbientContext(node);
+        }
+        function getEffectiveDeclarationFlags(n, flagsToCheck) {
+            var flags = ts.getCombinedNodeFlags(n);
+            if (n.parent.kind !== 222 &&
+                n.parent.kind !== 221 &&
+                n.parent.kind !== 192 &&
+                ts.isInAmbientContext(n)) {
+                if (!(flags & 2)) {
+                    flags |= 1;
+                }
+                flags |= 2;
+            }
+            return flags & flagsToCheck;
+        }
+        function checkFunctionOrConstructorSymbol(symbol) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            function getCanonicalOverload(overloads, implementation) {
+                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
+                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
+            }
+            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
+                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
+                if (someButNotAllOverloadFlags !== 0) {
+                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
+                    ts.forEach(overloads, function (o) {
+                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
+                        if (deviation & 1) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                        }
+                        else if (deviation & 2) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                        }
+                        else if (deviation & (8 | 16)) {
+                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                        }
+                        else if (deviation & 128) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                        }
+                    });
+                }
+            }
+            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
+                if (someHaveQuestionToken !== allHaveQuestionToken) {
+                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
+                    ts.forEach(overloads, function (o) {
+                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
+                        if (deviation) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                        }
+                    });
+                }
+            }
+            var flagsToCheck = 1 | 2 | 8 | 16 | 128;
+            var someNodeFlags = 0;
+            var allNodeFlags = flagsToCheck;
+            var someHaveQuestionToken = false;
+            var allHaveQuestionToken = true;
+            var hasOverloads = false;
+            var bodyDeclaration;
+            var lastSeenNonAmbientDeclaration;
+            var previousDeclaration;
+            var declarations = symbol.declarations;
+            var isConstructor = (symbol.flags & 16384) !== 0;
+            function reportImplementationExpectedError(node) {
+                if (node.name && ts.nodeIsMissing(node.name)) {
+                    return;
+                }
+                var seen = false;
+                var subsequentNode = ts.forEachChild(node.parent, function (c) {
+                    if (seen) {
+                        return c;
+                    }
+                    else {
+                        seen = c === node;
+                    }
+                });
+                if (subsequentNode && subsequentNode.pos === node.end) {
+                    if (subsequentNode.kind === node.kind) {
+                        var errorNode_1 = subsequentNode.name || subsequentNode;
+                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
+                            var reportError = (node.kind === 147 || node.kind === 146) &&
+                                (node.flags & 32) !== (subsequentNode.flags & 32);
+                            if (reportError) {
+                                var diagnostic = node.flags & 32 ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
+                                error(errorNode_1, diagnostic);
+                            }
+                            return;
+                        }
+                        else if (ts.nodeIsPresent(subsequentNode.body)) {
+                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
+                            return;
+                        }
+                    }
+                }
+                var errorNode = node.name || node;
+                if (isConstructor) {
+                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
+                }
+                else {
+                    if (node.flags & 128) {
+                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
+                    }
+                    else {
+                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
+                    }
+                }
+            }
+            var isExportSymbolInsideModule = symbol.parent && symbol.parent.flags & 1536;
+            var duplicateFunctionDeclaration = false;
+            var multipleConstructorImplementation = false;
+            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
+                var current = declarations_4[_i];
+                var node = current;
+                var inAmbientContext = ts.isInAmbientContext(node);
+                var inAmbientContextOrInterface = node.parent.kind === 222 || node.parent.kind === 159 || inAmbientContext;
+                if (inAmbientContextOrInterface) {
+                    previousDeclaration = undefined;
+                }
+                if (node.kind === 220 || node.kind === 147 || node.kind === 146 || node.kind === 148) {
+                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
+                    someNodeFlags |= currentNodeFlags;
+                    allNodeFlags &= currentNodeFlags;
+                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
+                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
+                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
+                        if (isConstructor) {
+                            multipleConstructorImplementation = true;
+                        }
+                        else {
+                            duplicateFunctionDeclaration = true;
+                        }
+                    }
+                    else if (!isExportSymbolInsideModule && previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
+                        reportImplementationExpectedError(previousDeclaration);
+                    }
+                    if (ts.nodeIsPresent(node.body)) {
+                        if (!bodyDeclaration) {
+                            bodyDeclaration = node;
+                        }
+                    }
+                    else {
+                        hasOverloads = true;
+                    }
+                    previousDeclaration = node;
+                    if (!inAmbientContextOrInterface) {
+                        lastSeenNonAmbientDeclaration = node;
+                    }
+                }
+            }
+            if (multipleConstructorImplementation) {
+                ts.forEach(declarations, function (declaration) {
+                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
+                });
+            }
+            if (duplicateFunctionDeclaration) {
+                ts.forEach(declarations, function (declaration) {
+                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
+                });
+            }
+            if (!isExportSymbolInsideModule && lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
+                !(lastSeenNonAmbientDeclaration.flags & 128) && !lastSeenNonAmbientDeclaration.questionToken) {
+                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
+            }
+            if (hasOverloads) {
+                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
+                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
+                if (bodyDeclaration) {
+                    var signatures = getSignaturesOfSymbol(symbol);
+                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
+                    for (var _a = 0, signatures_3 = signatures; _a < signatures_3.length; _a++) {
+                        var signature = signatures_3[_a];
+                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
+                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+        function checkExportsOnMergedDeclarations(node) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            var symbol = node.localSymbol;
+            if (!symbol) {
+                symbol = getSymbolOfNode(node);
+                if (!(symbol.flags & 7340032)) {
+                    return;
+                }
+            }
+            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
+                return;
+            }
+            var exportedDeclarationSpaces = 0;
+            var nonExportedDeclarationSpaces = 0;
+            var defaultExportedDeclarationSpaces = 0;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var d = _a[_i];
+                var declarationSpaces = getDeclarationSpaces(d);
+                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 | 512);
+                if (effectiveDeclarationFlags & 1) {
+                    if (effectiveDeclarationFlags & 512) {
+                        defaultExportedDeclarationSpaces |= declarationSpaces;
+                    }
+                    else {
+                        exportedDeclarationSpaces |= declarationSpaces;
+                    }
+                }
+                else {
+                    nonExportedDeclarationSpaces |= declarationSpaces;
+                }
+            }
+            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
+            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
+                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
+                    var d = _c[_b];
+                    var declarationSpaces = getDeclarationSpaces(d);
+                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
+                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
+                    }
+                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
+                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
+                    }
+                }
+            }
+            function getDeclarationSpaces(d) {
+                switch (d.kind) {
+                    case 222:
+                        return 2097152;
+                    case 225:
+                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0
+                            ? 4194304 | 1048576
+                            : 4194304;
+                    case 221:
+                    case 224:
+                        return 2097152 | 1048576;
+                    case 229:
+                        var result_1 = 0;
+                        var target = resolveAlias(getSymbolOfNode(d));
+                        ts.forEach(target.declarations, function (d) { result_1 |= getDeclarationSpaces(d); });
+                        return result_1;
+                    default:
+                        return 1048576;
+                }
+            }
+        }
+        function checkNonThenableType(type, location, message) {
+            type = getWidenedType(type);
+            if (!isTypeAny(type) && isTypeAssignableTo(type, getGlobalThenableType())) {
+                if (location) {
+                    if (!message) {
+                        message = ts.Diagnostics.Operand_for_await_does_not_have_a_valid_callable_then_member;
+                    }
+                    error(location, message);
+                }
+                return unknownType;
+            }
+            return type;
+        }
+        function getPromisedType(promise) {
+            if (promise.flags & 1) {
+                return undefined;
+            }
+            if ((promise.flags & 4096) && promise.target === tryGetGlobalPromiseType()) {
+                return promise.typeArguments[0];
+            }
+            var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType();
+            if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) {
+                return undefined;
+            }
+            var thenFunction = getTypeOfPropertyOfType(promise, "then");
+            if (thenFunction && (thenFunction.flags & 1)) {
+                return undefined;
+            }
+            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0) : emptyArray;
+            if (thenSignatures.length === 0) {
+                return undefined;
+            }
+            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072);
+            if (onfulfilledParameterType.flags & 1) {
+                return undefined;
+            }
+            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0);
+            if (onfulfilledParameterSignatures.length === 0) {
+                return undefined;
+            }
+            var valueParameterType = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature));
+            return valueParameterType;
+        }
+        function getTypeOfFirstParameterOfSignature(signature) {
+            return getTypeAtPosition(signature, 0);
+        }
+        function getAwaitedType(type) {
+            return checkAwaitedType(type, undefined, undefined);
+        }
+        function checkAwaitedType(type, location, message) {
+            return checkAwaitedTypeWorker(type);
+            function checkAwaitedTypeWorker(type) {
+                if (type.flags & 16384) {
+                    var types = [];
+                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                        var constituentType = _a[_i];
+                        types.push(checkAwaitedTypeWorker(constituentType));
+                    }
+                    return getUnionType(types);
+                }
+                else {
+                    var promisedType = getPromisedType(type);
+                    if (promisedType === undefined) {
+                        return checkNonThenableType(type, location, message);
+                    }
+                    else {
+                        if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
+                            if (location) {
+                                error(location, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method, symbolToString(type.symbol));
+                            }
+                            return unknownType;
+                        }
+                        awaitedTypeStack.push(type.id);
+                        var awaitedType = checkAwaitedTypeWorker(promisedType);
+                        awaitedTypeStack.pop();
+                        return awaitedType;
+                    }
+                }
+            }
+        }
+        function checkCorrectPromiseType(returnType, location) {
+            if (returnType === unknownType) {
+                return unknownType;
+            }
+            var globalPromiseType = getGlobalPromiseType();
+            if (globalPromiseType === emptyGenericType
+                || globalPromiseType === getTargetType(returnType)) {
+                return checkAwaitedType(returnType, location, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+            }
+            error(location, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
+            return unknownType;
+        }
+        function checkAsyncFunctionReturnType(node) {
+            if (languageVersion >= 2) {
+                var returnType = getTypeFromTypeNode(node.type);
+                return checkCorrectPromiseType(returnType, node.type);
+            }
+            var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType();
+            if (globalPromiseConstructorLikeType === emptyObjectType) {
+                return unknownType;
+            }
+            var promiseType = getTypeFromTypeNode(node.type);
+            if (promiseType === unknownType && compilerOptions.isolatedModules) {
+                return unknownType;
+            }
+            var promiseConstructor = getNodeLinks(node.type).resolvedSymbol;
+            if (!promiseConstructor || !symbolIsValue(promiseConstructor)) {
+                var typeName = promiseConstructor
+                    ? symbolToString(promiseConstructor)
+                    : typeToString(promiseType);
+                error(node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName);
+                return unknownType;
+            }
+            checkReturnTypeAnnotationAsExpression(node);
+            var promiseConstructorType = getTypeOfSymbol(promiseConstructor);
+            if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) {
+                return unknownType;
+            }
+            var promiseName = ts.getEntityNameFromTypeNode(node.type);
+            var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName);
+            var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455);
+            if (rootSymbol) {
+                error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor));
+                return unknownType;
+            }
+            return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+        }
+        function checkDecorator(node) {
+            var signature = getResolvedSignature(node);
+            var returnType = getReturnTypeOfSignature(signature);
+            if (returnType.flags & 1) {
+                return;
+            }
+            var expectedReturnType;
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            var errorInfo;
+            switch (node.parent.kind) {
+                case 221:
+                    var classSymbol = getSymbolOfNode(node.parent);
+                    var classConstructorType = getTypeOfSymbol(classSymbol);
+                    expectedReturnType = getUnionType([classConstructorType, voidType]);
+                    break;
+                case 142:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 145:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 147:
+                case 149:
+                case 150:
+                    var methodType = getTypeOfNode(node.parent);
+                    var descriptorType = createTypedPropertyDescriptorType(methodType);
+                    expectedReturnType = getUnionType([descriptorType, voidType]);
+                    break;
+            }
+            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
+        }
+        function checkTypeNodeAsExpression(node) {
+            if (node && node.kind === 155) {
+                var root = getFirstIdentifier(node.typeName);
+                var meaning = root.parent.kind === 155 ? 793056 : 1536;
+                var rootSymbol = resolveName(root, root.text, meaning | 8388608, undefined, undefined);
+                if (rootSymbol && rootSymbol.flags & 8388608) {
+                    var aliasTarget = resolveAlias(rootSymbol);
+                    if (aliasTarget.flags & 107455 && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
+                        markAliasSymbolAsReferenced(rootSymbol);
+                    }
+                }
+            }
+        }
+        function checkTypeAnnotationAsExpression(node) {
+            checkTypeNodeAsExpression(node.type);
+        }
+        function checkReturnTypeAnnotationAsExpression(node) {
+            checkTypeNodeAsExpression(node.type);
+        }
+        function checkParameterTypeAnnotationsAsExpressions(node) {
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                checkTypeAnnotationAsExpression(parameter);
+            }
+        }
+        function checkDecorators(node) {
+            if (!node.decorators) {
+                return;
+            }
+            if (!ts.nodeCanBeDecorated(node)) {
+                return;
+            }
+            if (!compilerOptions.experimentalDecorators) {
+                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
+            }
+            if (compilerOptions.emitDecoratorMetadata) {
+                switch (node.kind) {
+                    case 221:
+                        var constructor = ts.getFirstConstructorWithBody(node);
+                        if (constructor) {
+                            checkParameterTypeAnnotationsAsExpressions(constructor);
+                        }
+                        break;
+                    case 147:
+                    case 149:
+                    case 150:
+                        checkParameterTypeAnnotationsAsExpressions(node);
+                        checkReturnTypeAnnotationAsExpression(node);
+                        break;
+                    case 145:
+                    case 142:
+                        checkTypeAnnotationAsExpression(node);
+                        break;
+                }
+            }
+            ts.forEach(node.decorators, checkDecorator);
+        }
+        function checkFunctionDeclaration(node) {
+            if (produceDiagnostics) {
+                checkFunctionOrMethodDeclaration(node) || checkGrammarForGenerator(node);
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+        }
+        function checkFunctionOrMethodDeclaration(node) {
+            checkDecorators(node);
+            checkSignatureDeclaration(node);
+            var isAsync = ts.isAsyncFunctionLike(node);
+            if (node.name && node.name.kind === 140) {
+                checkComputedPropertyName(node.name);
+            }
+            if (!ts.hasDynamicName(node)) {
+                var symbol = getSymbolOfNode(node);
+                var localSymbol = node.localSymbol || symbol;
+                var firstDeclaration = ts.forEach(localSymbol.declarations, function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
+                    declaration : undefined; });
+                if (node === firstDeclaration) {
+                    checkFunctionOrConstructorSymbol(localSymbol);
+                }
+                if (symbol.parent) {
+                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
+                        checkFunctionOrConstructorSymbol(symbol);
+                    }
+                }
+            }
+            checkSourceElement(node.body);
+            if (!node.asteriskToken) {
+                var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (produceDiagnostics && !node.type) {
+                if (compilerOptions.noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
+                    reportImplicitAnyError(node, anyType);
+                }
+                if (node.asteriskToken && ts.nodeIsPresent(node.body)) {
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+                }
+            }
+        }
+        function checkBlock(node) {
+            if (node.kind === 199) {
+                checkGrammarStatementInAmbientContext(node);
+            }
+            ts.forEach(node.statements, checkSourceElement);
+        }
+        function checkCollisionWithArgumentsInGeneratedCode(node) {
+            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
+                return;
+            }
+            ts.forEach(node.parameters, function (p) {
+                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
+                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
+                }
+            });
+        }
+        function needCollisionCheckForIdentifier(node, identifier, name) {
+            if (!(identifier && identifier.text === name)) {
+                return false;
+            }
+            if (node.kind === 145 ||
+                node.kind === 144 ||
+                node.kind === 147 ||
+                node.kind === 146 ||
+                node.kind === 149 ||
+                node.kind === 150) {
+                return false;
+            }
+            if (ts.isInAmbientContext(node)) {
+                return false;
+            }
+            var root = ts.getRootDeclaration(node);
+            if (root.kind === 142 && ts.nodeIsMissing(root.parent.body)) {
+                return false;
+            }
+            return true;
+        }
+        function checkCollisionWithCapturedThisVariable(node, name) {
+            if (needCollisionCheckForIdentifier(node, name, "_this")) {
+                potentialThisCollisions.push(node);
+            }
+        }
+        function checkIfThisIsCapturedInEnclosingScope(node) {
+            var current = node;
+            while (current) {
+                if (getNodeCheckFlags(current) & 4) {
+                    var isDeclaration_1 = node.kind !== 69;
+                    if (isDeclaration_1) {
+                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                    }
+                    else {
+                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
+                    }
+                    return;
+                }
+                current = current.parent;
+            }
+        }
+        function checkCollisionWithCapturedSuperVariable(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
+                return;
+            }
+            var enclosingClass = ts.getContainingClass(node);
+            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
+                return;
+            }
+            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
+                var isDeclaration_2 = node.kind !== 69;
+                if (isDeclaration_2) {
+                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
+                }
+                else {
+                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
+                }
+            }
+        }
+        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
+                return;
+            }
+            if (node.kind === 225 && ts.getModuleInstanceState(node) !== 1) {
+                return;
+            }
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 256 && ts.isExternalOrCommonJsModule(parent)) {
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            }
+        }
+        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "Promise")) {
+                return;
+            }
+            if (node.kind === 225 && ts.getModuleInstanceState(node) !== 1) {
+                return;
+            }
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 256 && ts.isExternalOrCommonJsModule(parent) && parent.flags & 2097152) {
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            }
+        }
+        function checkVarDeclaredNamesNotShadowed(node) {
+            if ((ts.getCombinedNodeFlags(node) & 3072) !== 0 || ts.isParameterDeclaration(node)) {
+                return;
+            }
+            if (node.kind === 218 && !node.initializer) {
+                return;
+            }
+            var symbol = getSymbolOfNode(node);
+            if (symbol.flags & 1) {
+                var localDeclarationSymbol = resolveName(node, node.name.text, 3, undefined, undefined);
+                if (localDeclarationSymbol &&
+                    localDeclarationSymbol !== symbol &&
+                    localDeclarationSymbol.flags & 2) {
+                    if (getDeclarationFlagsFromSymbol(localDeclarationSymbol) & 3072) {
+                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 219);
+                        var container = varDeclList.parent.kind === 200 && varDeclList.parent.parent
+                            ? varDeclList.parent.parent
+                            : undefined;
+                        var namesShareScope = container &&
+                            (container.kind === 199 && ts.isFunctionLike(container.parent) ||
+                                container.kind === 226 ||
+                                container.kind === 225 ||
+                                container.kind === 256);
+                        if (!namesShareScope) {
+                            var name_17 = symbolToString(localDeclarationSymbol);
+                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_17, name_17);
+                        }
+                    }
+                }
+            }
+        }
+        function checkParameterInitializer(node) {
+            if (ts.getRootDeclaration(node).kind !== 142) {
+                return;
+            }
+            var func = ts.getContainingFunction(node);
+            visit(node.initializer);
+            function visit(n) {
+                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
+                    return;
+                }
+                if (n.kind === 172) {
+                    return visit(n.expression);
+                }
+                else if (n.kind === 69) {
+                    var symbol = resolveName(n, n.text, 107455 | 8388608, undefined, undefined);
+                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
+                        return;
+                    }
+                    if (symbol.valueDeclaration === node) {
+                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
+                        return;
+                    }
+                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (enclosingContainer === func) {
+                        if (symbol.valueDeclaration.kind === 142) {
+                            if (symbol.valueDeclaration.pos < node.pos) {
+                                return;
+                            }
+                            var current = n;
+                            while (current !== node.initializer) {
+                                if (ts.isFunctionLike(current.parent)) {
+                                    return;
+                                }
+                                if (current.parent.kind === 145 &&
+                                    !(current.parent.flags & 32) &&
+                                    ts.isClassLike(current.parent.parent)) {
+                                    return;
+                                }
+                                current = current.parent;
+                            }
+                        }
+                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
+                    }
+                }
+                else {
+                    return ts.forEachChild(n, visit);
+                }
+            }
+        }
+        function checkVariableLikeDeclaration(node) {
+            checkDecorators(node);
+            checkSourceElement(node.type);
+            if (node.name.kind === 140) {
+                checkComputedPropertyName(node.name);
+                if (node.initializer) {
+                    checkExpressionCached(node.initializer);
+                }
+            }
+            if (node.kind === 169) {
+                if (node.propertyName && node.propertyName.kind === 140) {
+                    checkComputedPropertyName(node.propertyName);
+                }
+                var parent_11 = node.parent.parent;
+                var parentType = getTypeForBindingElementParent(parent_11);
+                var name_18 = node.propertyName || node.name;
+                var property = getPropertyOfType(parentType, getTextOfPropertyName(name_18));
+                if (parent_11.initializer && property && getParentOfSymbol(property)) {
+                    checkClassPropertyAccess(parent_11, parent_11.initializer, parentType, property);
+                }
+            }
+            if (ts.isBindingPattern(node.name)) {
+                ts.forEach(node.name.elements, checkSourceElement);
+            }
+            if (node.initializer && ts.getRootDeclaration(node).kind === 142 && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
+                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
+                return;
+            }
+            if (ts.isBindingPattern(node.name)) {
+                if (node.initializer && node.parent.parent.kind !== 207) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, undefined);
+                    checkParameterInitializer(node);
+                }
+                return;
+            }
+            var symbol = getSymbolOfNode(node);
+            var type = getTypeOfVariableOrParameterOrProperty(symbol);
+            if (node === symbol.valueDeclaration) {
+                if (node.initializer && node.parent.parent.kind !== 207) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, undefined);
+                    checkParameterInitializer(node);
+                }
+            }
+            else {
+                var declarationType = getWidenedTypeForVariableLikeDeclaration(node);
+                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
+                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
+                }
+                if (node.initializer) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, undefined);
+                }
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                }
+            }
+            if (node.kind !== 145 && node.kind !== 144) {
+                checkExportsOnMergedDeclarations(node);
+                if (node.kind === 218 || node.kind === 169) {
+                    checkVarDeclaredNamesNotShadowed(node);
+                }
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+        }
+        function areDeclarationFlagsIdentical(left, right) {
+            if ((left.kind === 142 && right.kind === 218) ||
+                (left.kind === 218 && right.kind === 142)) {
+                return true;
+            }
+            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
+                return false;
+            }
+            var interestingFlags = 8 |
+                16 |
+                256 |
+                128 |
+                64 |
+                32;
+            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
+        }
+        function checkVariableDeclaration(node) {
+            checkGrammarVariableDeclaration(node);
+            return checkVariableLikeDeclaration(node);
+        }
+        function checkBindingElement(node) {
+            checkGrammarBindingElement(node);
+            return checkVariableLikeDeclaration(node);
+        }
+        function checkVariableStatement(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
+            ts.forEach(node.declarationList.declarations, checkSourceElement);
+        }
+        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
+            if (node.modifiers && node.parent.kind === 171) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    if (node.modifiers.length > 1) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                }
+                else {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                }
+            }
+        }
+        function checkExpressionStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+        }
+        function checkIfStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.thenStatement);
+            if (node.thenStatement.kind === 201) {
+                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
+            }
+            checkSourceElement(node.elseStatement);
+        }
+        function checkDoStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkSourceElement(node.statement);
+            checkExpression(node.expression);
+        }
+        function checkWhileStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.statement);
+        }
+        function checkForStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.initializer && node.initializer.kind === 219) {
+                    checkGrammarVariableDeclarationList(node.initializer);
+                }
+            }
+            if (node.initializer) {
+                if (node.initializer.kind === 219) {
+                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
+                }
+                else {
+                    checkExpression(node.initializer);
+                }
+            }
+            if (node.condition)
+                checkExpression(node.condition);
+            if (node.incrementor)
+                checkExpression(node.incrementor);
+            checkSourceElement(node.statement);
+        }
+        function checkForOfStatement(node) {
+            checkGrammarForInOrForOfStatement(node);
+            if (node.initializer.kind === 219) {
+                checkForInOrForOfVariableDeclaration(node);
+            }
+            else {
+                var varExpr = node.initializer;
+                var iteratedType = checkRightHandSideOfForOf(node.expression);
+                if (varExpr.kind === 170 || varExpr.kind === 171) {
+                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
+                }
+                else {
+                    var leftType = checkExpression(varExpr);
+                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_of_statement, ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property);
+                    if (iteratedType) {
+                        checkTypeAssignableTo(iteratedType, leftType, varExpr, undefined);
+                    }
+                }
+            }
+            checkSourceElement(node.statement);
+        }
+        function checkForInStatement(node) {
+            checkGrammarForInOrForOfStatement(node);
+            if (node.initializer.kind === 219) {
+                var variable = node.initializer.declarations[0];
+                if (variable && ts.isBindingPattern(variable.name)) {
+                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                }
+                checkForInOrForOfVariableDeclaration(node);
+            }
+            else {
+                var varExpr = node.initializer;
+                var leftType = checkExpression(varExpr);
+                if (varExpr.kind === 170 || varExpr.kind === 171) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                }
+                else if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258)) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
+                }
+                else {
+                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_in_statement, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property);
+                }
+            }
+            var rightType = checkNonNullExpression(node.expression);
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 | 512)) {
+                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            checkSourceElement(node.statement);
+        }
+        function checkForInOrForOfVariableDeclaration(iterationStatement) {
+            var variableDeclarationList = iterationStatement.initializer;
+            if (variableDeclarationList.declarations.length >= 1) {
+                var decl = variableDeclarationList.declarations[0];
+                checkVariableDeclaration(decl);
+            }
+        }
+        function checkRightHandSideOfForOf(rhsExpression) {
+            var expressionType = checkNonNullExpression(rhsExpression);
+            return checkIteratedTypeOrElementType(expressionType, rhsExpression, true);
+        }
+        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput) {
+            if (isTypeAny(inputType)) {
+                return inputType;
+            }
+            if (languageVersion >= 2) {
+                return checkElementTypeOfIterable(inputType, errorNode);
+            }
+            if (allowStringInput) {
+                return checkElementTypeOfArrayOrString(inputType, errorNode);
+            }
+            if (isArrayLikeType(inputType)) {
+                var indexType = getIndexTypeOfType(inputType, 1);
+                if (indexType) {
+                    return indexType;
+                }
+            }
+            if (errorNode) {
+                error(errorNode, ts.Diagnostics.Type_0_is_not_an_array_type, typeToString(inputType));
+            }
+            return unknownType;
+        }
+        function checkElementTypeOfIterable(iterable, errorNode) {
+            var elementType = getElementTypeOfIterable(iterable, errorNode);
+            if (errorNode && elementType) {
+                checkTypeAssignableTo(iterable, createIterableType(elementType), errorNode);
+            }
+            return elementType || anyType;
+        }
+        function getElementTypeOfIterable(type, errorNode) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            var typeAsIterable = type;
+            if (!typeAsIterable.iterableElementType) {
+                if ((type.flags & 4096) && type.target === getGlobalIterableType()) {
+                    typeAsIterable.iterableElementType = type.typeArguments[0];
+                }
+                else {
+                    var iteratorFunction = getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator"));
+                    if (isTypeAny(iteratorFunction)) {
+                        return undefined;
+                    }
+                    var iteratorFunctionSignatures = iteratorFunction ? getSignaturesOfType(iteratorFunction, 0) : emptyArray;
+                    if (iteratorFunctionSignatures.length === 0) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
+                        }
+                        return undefined;
+                    }
+                    typeAsIterable.iterableElementType = getElementTypeOfIterator(getUnionType(ts.map(iteratorFunctionSignatures, getReturnTypeOfSignature)), errorNode);
+                }
+            }
+            return typeAsIterable.iterableElementType;
+        }
+        function getElementTypeOfIterator(type, errorNode) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            var typeAsIterator = type;
+            if (!typeAsIterator.iteratorElementType) {
+                if ((type.flags & 4096) && type.target === getGlobalIteratorType()) {
+                    typeAsIterator.iteratorElementType = type.typeArguments[0];
+                }
+                else {
+                    var iteratorNextFunction = getTypeOfPropertyOfType(type, "next");
+                    if (isTypeAny(iteratorNextFunction)) {
+                        return undefined;
+                    }
+                    var iteratorNextFunctionSignatures = iteratorNextFunction ? getSignaturesOfType(iteratorNextFunction, 0) : emptyArray;
+                    if (iteratorNextFunctionSignatures.length === 0) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.An_iterator_must_have_a_next_method);
+                        }
+                        return undefined;
+                    }
+                    var iteratorNextResult = getUnionType(ts.map(iteratorNextFunctionSignatures, getReturnTypeOfSignature));
+                    if (isTypeAny(iteratorNextResult)) {
+                        return undefined;
+                    }
+                    var iteratorNextValue = getTypeOfPropertyOfType(iteratorNextResult, "value");
+                    if (!iteratorNextValue) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
+                        }
+                        return undefined;
+                    }
+                    typeAsIterator.iteratorElementType = iteratorNextValue;
+                }
+            }
+            return typeAsIterator.iteratorElementType;
+        }
+        function getElementTypeOfIterableIterator(type) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            if ((type.flags & 4096) && type.target === getGlobalIterableIteratorType()) {
+                return type.typeArguments[0];
+            }
+            return getElementTypeOfIterable(type, undefined) ||
+                getElementTypeOfIterator(type, undefined);
+        }
+        function checkElementTypeOfArrayOrString(arrayOrStringType, errorNode) {
+            ts.Debug.assert(languageVersion < 2);
+            var arrayType = arrayOrStringType;
+            if (arrayOrStringType.flags & 16384) {
+                arrayType = getUnionType(ts.filter(arrayOrStringType.types, function (t) { return !(t.flags & 258); }));
+            }
+            else if (arrayOrStringType.flags & 258) {
+                arrayType = neverType;
+            }
+            var hasStringConstituent = arrayOrStringType !== arrayType;
+            var reportedError = false;
+            if (hasStringConstituent) {
+                if (languageVersion < 1) {
+                    error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
+                    reportedError = true;
+                }
+                if (arrayType === neverType) {
+                    return stringType;
+                }
+            }
+            if (!isArrayLikeType(arrayType)) {
+                if (!reportedError) {
+                    var diagnostic = hasStringConstituent
+                        ? ts.Diagnostics.Type_0_is_not_an_array_type
+                        : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
+                    error(errorNode, diagnostic, typeToString(arrayType));
+                }
+                return hasStringConstituent ? stringType : unknownType;
+            }
+            var arrayElementType = getIndexTypeOfType(arrayType, 1) || unknownType;
+            if (hasStringConstituent) {
+                if (arrayElementType.flags & 258) {
+                    return stringType;
+                }
+                return getUnionType([arrayElementType, stringType]);
+            }
+            return arrayElementType;
+        }
+        function checkBreakOrContinueStatement(node) {
+            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
+        }
+        function isGetAccessorWithAnnotatedSetAccessor(node) {
+            return !!(node.kind === 149 && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 150)));
+        }
+        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
+            var unwrappedReturnType = ts.isAsyncFunctionLike(func) ? getPromisedType(returnType) : returnType;
+            return maybeTypeOfKind(unwrappedReturnType, 16 | 1);
+        }
+        function checkReturnStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                var functionBlock = ts.getContainingFunction(node);
+                if (!functionBlock) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
+                }
+            }
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var signature = getSignatureFromDeclaration(func);
+                var returnType = getReturnTypeOfSignature(signature);
+                if (strictNullChecks || node.expression || returnType === neverType) {
+                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
+                    if (func.asteriskToken) {
+                        return;
+                    }
+                    if (func.kind === 150) {
+                        if (node.expression) {
+                            error(node.expression, ts.Diagnostics.Setters_cannot_return_a_value);
+                        }
+                    }
+                    else if (func.kind === 148) {
+                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node.expression)) {
+                            error(node.expression, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
+                        }
+                    }
+                    else if (func.type || isGetAccessorWithAnnotatedSetAccessor(func)) {
+                        if (ts.isAsyncFunctionLike(func)) {
+                            var promisedType = getPromisedType(returnType);
+                            var awaitedType = checkAwaitedType(exprType, node.expression || node, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                            if (promisedType) {
+                                checkTypeAssignableTo(awaitedType, promisedType, node.expression || node);
+                            }
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnType, node.expression || node);
+                        }
+                    }
+                }
+                else if (func.kind !== 148 && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
+                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
+                }
+            }
+        }
+        function checkWithStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.flags & 33554432) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
+                }
+            }
+            checkExpression(node.expression);
+            error(node.expression, ts.Diagnostics.All_symbols_within_a_with_block_will_be_resolved_to_any);
+        }
+        function checkSwitchStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            var firstDefaultClause;
+            var hasDuplicateDefaultClause = false;
+            var expressionType = checkExpression(node.expression);
+            ts.forEach(node.caseBlock.clauses, function (clause) {
+                if (clause.kind === 250 && !hasDuplicateDefaultClause) {
+                    if (firstDefaultClause === undefined) {
+                        firstDefaultClause = clause;
+                    }
+                    else {
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
+                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
+                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
+                        hasDuplicateDefaultClause = true;
+                    }
+                }
+                if (produceDiagnostics && clause.kind === 249) {
+                    var caseClause = clause;
+                    var caseType = checkExpression(caseClause.expression);
+                    if (!isTypeEqualityComparableTo(expressionType, caseType)) {
+                        checkTypeComparableTo(caseType, expressionType, caseClause.expression, undefined);
+                    }
+                }
+                ts.forEach(clause.statements, checkSourceElement);
+            });
+        }
+        function checkLabeledStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                var current = node.parent;
+                while (current) {
+                    if (ts.isFunctionLike(current)) {
+                        break;
+                    }
+                    if (current.kind === 214 && current.label.text === node.label.text) {
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
+                        break;
+                    }
+                    current = current.parent;
+                }
+            }
+            checkSourceElement(node.statement);
+        }
+        function checkThrowStatement(node) {
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.expression === undefined) {
+                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
+                }
+            }
+            if (node.expression) {
+                checkExpression(node.expression);
+            }
+        }
+        function checkTryStatement(node) {
+            checkGrammarStatementInAmbientContext(node);
+            checkBlock(node.tryBlock);
+            var catchClause = node.catchClause;
+            if (catchClause) {
+                if (catchClause.variableDeclaration) {
+                    if (catchClause.variableDeclaration.name.kind !== 69) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.name, ts.Diagnostics.Catch_clause_variable_name_must_be_an_identifier);
+                    }
+                    else if (catchClause.variableDeclaration.type) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
+                    }
+                    else if (catchClause.variableDeclaration.initializer) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
+                    }
+                    else {
+                        var identifierName = catchClause.variableDeclaration.name.text;
+                        var locals = catchClause.block.locals;
+                        if (locals && ts.hasProperty(locals, identifierName)) {
+                            var localSymbol = locals[identifierName];
+                            if (localSymbol && (localSymbol.flags & 2) !== 0) {
+                                grammarErrorOnNode(localSymbol.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, identifierName);
+                            }
+                        }
+                    }
+                }
+                checkBlock(catchClause.block);
+            }
+            if (node.finallyBlock) {
+                checkBlock(node.finallyBlock);
+            }
+        }
+        function checkIndexConstraints(type) {
+            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1);
+            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0);
+            var stringIndexType = getIndexTypeOfType(type, 0);
+            var numberIndexType = getIndexTypeOfType(type, 1);
+            if (stringIndexType || numberIndexType) {
+                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
+                    var propType = getTypeOfSymbol(prop);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1);
+                });
+                if (type.flags & 1024 && ts.isClassLike(type.symbol.valueDeclaration)) {
+                    var classDeclaration = type.symbol.valueDeclaration;
+                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        if (!(member.flags & 32) && ts.hasDynamicName(member)) {
+                            var propType = getTypeOfSymbol(member.symbol);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1);
+                        }
+                    }
+                }
+            }
+            var errorNode;
+            if (stringIndexType && numberIndexType) {
+                errorNode = declaredNumberIndexer || declaredStringIndexer;
+                if (!errorNode && (type.flags & 2048)) {
+                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0) && getIndexTypeOfType(base, 1); });
+                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
+                }
+            }
+            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
+                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
+            }
+            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
+                if (!indexType) {
+                    return;
+                }
+                if (indexKind === 1 && !isNumericName(prop.valueDeclaration.name)) {
+                    return;
+                }
+                var errorNode;
+                if (prop.valueDeclaration.name.kind === 140 || prop.parent === containingType.symbol) {
+                    errorNode = prop.valueDeclaration;
+                }
+                else if (indexDeclaration) {
+                    errorNode = indexDeclaration;
+                }
+                else if (containingType.flags & 2048) {
+                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
+                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
+                }
+                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
+                    var errorMessage = indexKind === 0
+                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
+                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
+                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
+                }
+            }
+        }
+        function checkTypeNameIsReserved(name, message) {
+            switch (name.text) {
+                case "any":
+                case "number":
+                case "boolean":
+                case "string":
+                case "symbol":
+                case "void":
+                    error(name, message, name.text);
+            }
+        }
+        function checkTypeParameters(typeParameterDeclarations) {
+            if (typeParameterDeclarations) {
+                for (var i = 0, n = typeParameterDeclarations.length; i < n; i++) {
+                    var node = typeParameterDeclarations[i];
+                    checkTypeParameter(node);
+                    if (produceDiagnostics) {
+                        for (var j = 0; j < i; j++) {
+                            if (typeParameterDeclarations[j].symbol === node.symbol) {
+                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        function checkTypeParameterListsIdentical(node, symbol) {
+            if (symbol.declarations.length === 1) {
+                return;
+            }
+            var firstDecl;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 221 || declaration.kind === 222) {
+                    if (!firstDecl) {
+                        firstDecl = declaration;
+                    }
+                    else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) {
+                        error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text);
+                    }
+                }
+            }
+        }
+        function checkClassExpression(node) {
+            checkClassLikeDeclaration(node);
+            checkNodeDeferred(node);
+            return getTypeOfSymbol(getSymbolOfNode(node));
+        }
+        function checkClassExpressionDeferred(node) {
+            ts.forEach(node.members, checkSourceElement);
+        }
+        function checkClassDeclaration(node) {
+            if (!node.name && !(node.flags & 512)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
+            }
+            checkClassLikeDeclaration(node);
+            ts.forEach(node.members, checkSourceElement);
+        }
+        function checkClassLikeDeclaration(node) {
+            checkGrammarClassDeclarationHeritageClauses(node);
+            checkDecorators(node);
+            if (node.name) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+            checkTypeParameters(node.typeParameters);
+            checkExportsOnMergedDeclarations(node);
+            var symbol = getSymbolOfNode(node);
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var typeWithThis = getTypeWithThisArgument(type);
+            var staticType = getTypeOfSymbol(symbol);
+            checkTypeParameterListsIdentical(node, symbol);
+            checkClassForDuplicateDeclarations(node);
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            if (baseTypeNode) {
+                var baseTypes = getBaseTypes(type);
+                if (baseTypes.length && produceDiagnostics) {
+                    var baseType_1 = baseTypes[0];
+                    var staticBaseType = getBaseConstructorTypeOfClass(type);
+                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
+                    checkSourceElement(baseTypeNode.expression);
+                    if (baseTypeNode.typeArguments) {
+                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
+                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments); _i < _a.length; _i++) {
+                            var constructor = _a[_i];
+                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
+                                break;
+                            }
+                        }
+                    }
+                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
+                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
+                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32)) {
+                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
+                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
+                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
+                        }
+                    }
+                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
+                }
+            }
+            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
+            if (implementedTypeNodes) {
+                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
+                    var typeRefNode = implementedTypeNodes_1[_b];
+                    if (!ts.isSupportedExpressionWithTypeArguments(typeRefNode)) {
+                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                    }
+                    checkTypeReferenceNode(typeRefNode);
+                    if (produceDiagnostics) {
+                        var t = getTypeFromTypeNode(typeRefNode);
+                        if (t !== unknownType) {
+                            var declaredType = (t.flags & 4096) ? t.target : t;
+                            if (declaredType.flags & (1024 | 2048)) {
+                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
+                            }
+                            else {
+                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
+                            }
+                        }
+                    }
+                }
+            }
+            if (produceDiagnostics) {
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+            }
+        }
+        function checkBaseTypeAccessibility(type, node) {
+            var signatures = getSignaturesOfType(type, 1);
+            if (signatures.length) {
+                var declaration = signatures[0].declaration;
+                if (declaration && declaration.flags & 8) {
+                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
+                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
+                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, node.expression.text);
+                    }
+                }
+            }
+        }
+        function getTargetSymbol(s) {
+            return s.flags & 16777216 ? getSymbolLinks(s).target : s;
+        }
+        function getClassLikeDeclarationOfSymbol(symbol) {
+            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
+        }
+        function checkKindsOfPropertyMemberOverrides(type, baseType) {
+            var baseProperties = getPropertiesOfObjectType(baseType);
+            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
+                var baseProperty = baseProperties_1[_i];
+                var base = getTargetSymbol(baseProperty);
+                if (base.flags & 134217728) {
+                    continue;
+                }
+                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
+                var baseDeclarationFlags = getDeclarationFlagsFromSymbol(base);
+                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
+                if (derived) {
+                    if (derived === base) {
+                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
+                        if (baseDeclarationFlags & 128 && (!derivedClassDecl || !(derivedClassDecl.flags & 128))) {
+                            if (derivedClassDecl.kind === 192) {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
+                            }
+                            else {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
+                            }
+                        }
+                    }
+                    else {
+                        var derivedDeclarationFlags = getDeclarationFlagsFromSymbol(derived);
+                        if ((baseDeclarationFlags & 8) || (derivedDeclarationFlags & 8)) {
+                            continue;
+                        }
+                        if ((baseDeclarationFlags & 32) !== (derivedDeclarationFlags & 32)) {
+                            continue;
+                        }
+                        if ((base.flags & derived.flags & 8192) || ((base.flags & 98308) && (derived.flags & 98308))) {
+                            continue;
+                        }
+                        var errorMessage = void 0;
+                        if (base.flags & 8192) {
+                            if (derived.flags & 98304) {
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
+                            }
+                            else {
+                                ts.Debug.assert((derived.flags & 4) !== 0);
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
+                            }
+                        }
+                        else if (base.flags & 4) {
+                            ts.Debug.assert((derived.flags & 8192) !== 0);
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
+                        }
+                        else {
+                            ts.Debug.assert((base.flags & 98304) !== 0);
+                            ts.Debug.assert((derived.flags & 8192) !== 0);
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
+                        }
+                        error(derived.valueDeclaration.name, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                    }
+                }
+            }
+        }
+        function isAccessor(kind) {
+            return kind === 149 || kind === 150;
+        }
+        function areTypeParametersIdentical(list1, list2) {
+            if (!list1 && !list2) {
+                return true;
+            }
+            if (!list1 || !list2 || list1.length !== list2.length) {
+                return false;
+            }
+            for (var i = 0, len = list1.length; i < len; i++) {
+                var tp1 = list1[i];
+                var tp2 = list2[i];
+                if (tp1.name.text !== tp2.name.text) {
+                    return false;
+                }
+                if (!tp1.constraint && !tp2.constraint) {
+                    continue;
+                }
+                if (!tp1.constraint || !tp2.constraint) {
+                    return false;
+                }
+                if (!isTypeIdenticalTo(getTypeFromTypeNode(tp1.constraint), getTypeFromTypeNode(tp2.constraint))) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkInheritedPropertiesAreIdentical(type, typeNode) {
+            var baseTypes = getBaseTypes(type);
+            if (baseTypes.length < 2) {
+                return true;
+            }
+            var seen = {};
+            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen[p.name] = { prop: p, containingType: type }; });
+            var ok = true;
+            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
+                var base = baseTypes_2[_i];
+                var properties = getPropertiesOfObjectType(getTypeWithThisArgument(base, type.thisType));
+                for (var _a = 0, properties_4 = properties; _a < properties_4.length; _a++) {
+                    var prop = properties_4[_a];
+                    if (!ts.hasProperty(seen, prop.name)) {
+                        seen[prop.name] = { prop: prop, containingType: base };
+                    }
+                    else {
+                        var existing = seen[prop.name];
+                        var isInheritedProperty = existing.containingType !== type;
+                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
+                            ok = false;
+                            var typeName1 = typeToString(existing.containingType);
+                            var typeName2 = typeToString(base);
+                            var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
+                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
+                        }
+                    }
+                }
+            }
+            return ok;
+        }
+        function checkInterfaceDeclaration(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
+            checkTypeParameters(node.typeParameters);
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                checkTypeParameterListsIdentical(node, symbol);
+                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 222);
+                if (node === firstInterfaceDecl) {
+                    var type = getDeclaredTypeOfSymbol(symbol);
+                    var typeWithThis = getTypeWithThisArgument(type);
+                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
+                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
+                            var baseType = _a[_i];
+                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
+                        }
+                        checkIndexConstraints(type);
+                    }
+                }
+                checkObjectTypeForDuplicateDeclarations(node);
+            }
+            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
+                if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
+                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                }
+                checkTypeReferenceNode(heritageElement);
+            });
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                checkTypeForDuplicateIndexSignatures(node);
+            }
+        }
+        function checkTypeAliasDeclaration(node) {
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
+            checkSourceElement(node.type);
+        }
+        function computeEnumMemberValues(node) {
+            var nodeLinks = getNodeLinks(node);
+            if (!(nodeLinks.flags & 16384)) {
+                var enumSymbol = getSymbolOfNode(node);
+                var enumType = getDeclaredTypeOfSymbol(enumSymbol);
+                var autoValue = 0;
+                var ambient = ts.isInAmbientContext(node);
+                var enumIsConst = ts.isConst(node);
+                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                    var member = _a[_i];
+                    if (isComputedNonLiteralName(member.name)) {
+                        error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
+                    }
+                    else {
+                        var text = getTextOfPropertyName(member.name);
+                        if (isNumericLiteralName(text)) {
+                            error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
+                        }
+                    }
+                    var previousEnumMemberIsNonConstant = autoValue === undefined;
+                    var initializer = member.initializer;
+                    if (initializer) {
+                        autoValue = computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient);
+                    }
+                    else if (ambient && !enumIsConst) {
+                        autoValue = undefined;
+                    }
+                    else if (previousEnumMemberIsNonConstant) {
+                        error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
+                    }
+                    if (autoValue !== undefined) {
+                        getNodeLinks(member).enumMemberValue = autoValue;
+                        autoValue++;
+                    }
+                }
+                nodeLinks.flags |= 16384;
+            }
+            function computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient) {
+                var reportError = true;
+                var value = evalConstant(initializer);
+                if (reportError) {
+                    if (value === undefined) {
+                        if (enumIsConst) {
+                            error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
+                        }
+                        else if (ambient) {
+                            error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
+                        }
+                        else {
+                            checkTypeAssignableTo(checkExpression(initializer), enumType, initializer, undefined);
+                        }
+                    }
+                    else if (enumIsConst) {
+                        if (isNaN(value)) {
+                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN);
+                        }
+                        else if (!isFinite(value)) {
+                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
+                        }
+                    }
+                }
+                return value;
+                function evalConstant(e) {
+                    switch (e.kind) {
+                        case 185:
+                            var value_1 = evalConstant(e.operand);
+                            if (value_1 === undefined) {
+                                return undefined;
+                            }
+                            switch (e.operator) {
+                                case 35: return value_1;
+                                case 36: return -value_1;
+                                case 50: return ~value_1;
+                            }
+                            return undefined;
+                        case 187:
+                            var left = evalConstant(e.left);
+                            if (left === undefined) {
+                                return undefined;
+                            }
+                            var right = evalConstant(e.right);
+                            if (right === undefined) {
+                                return undefined;
+                            }
+                            switch (e.operatorToken.kind) {
+                                case 47: return left | right;
+                                case 46: return left & right;
+                                case 44: return left >> right;
+                                case 45: return left >>> right;
+                                case 43: return left << right;
+                                case 48: return left ^ right;
+                                case 37: return left * right;
+                                case 39: return left / right;
+                                case 35: return left + right;
+                                case 36: return left - right;
+                                case 40: return left % right;
+                            }
+                            return undefined;
+                        case 8:
+                            return +e.text;
+                        case 178:
+                            return evalConstant(e.expression);
+                        case 69:
+                        case 173:
+                        case 172:
+                            var member = initializer.parent;
+                            var currentType = getTypeOfSymbol(getSymbolOfNode(member.parent));
+                            var enumType_1;
+                            var propertyName = void 0;
+                            if (e.kind === 69) {
+                                enumType_1 = currentType;
+                                propertyName = e.text;
+                            }
+                            else {
+                                var expression = void 0;
+                                if (e.kind === 173) {
+                                    if (e.argumentExpression === undefined ||
+                                        e.argumentExpression.kind !== 9) {
+                                        return undefined;
+                                    }
+                                    expression = e.expression;
+                                    propertyName = e.argumentExpression.text;
+                                }
+                                else {
+                                    expression = e.expression;
+                                    propertyName = e.name.text;
+                                }
+                                var current = expression;
+                                while (current) {
+                                    if (current.kind === 69) {
+                                        break;
+                                    }
+                                    else if (current.kind === 172) {
+                                        current = current.expression;
+                                    }
+                                    else {
+                                        return undefined;
+                                    }
+                                }
+                                enumType_1 = checkExpression(expression);
+                                if (!(enumType_1.symbol && (enumType_1.symbol.flags & 384))) {
+                                    return undefined;
+                                }
+                            }
+                            if (propertyName === undefined) {
+                                return undefined;
+                            }
+                            var property = getPropertyOfObjectType(enumType_1, propertyName);
+                            if (!property || !(property.flags & 8)) {
+                                return undefined;
+                            }
+                            var propertyDecl = property.valueDeclaration;
+                            if (member === propertyDecl) {
+                                return undefined;
+                            }
+                            if (!isBlockScopedNameDeclaredBeforeUse(propertyDecl, member)) {
+                                reportError = false;
+                                error(e, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
+                                return undefined;
+                            }
+                            return getNodeLinks(propertyDecl).enumMemberValue;
+                    }
+                }
+            }
+        }
+        function checkEnumDeclaration(node) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkExportsOnMergedDeclarations(node);
+            computeEnumMemberValues(node);
+            var enumIsConst = ts.isConst(node);
+            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
+                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
+            }
+            var enumSymbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
+            if (node === firstDeclaration) {
+                if (enumSymbol.declarations.length > 1) {
+                    ts.forEach(enumSymbol.declarations, function (decl) {
+                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
+                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                        }
+                    });
+                }
+                var seenEnumMissingInitialInitializer_1 = false;
+                ts.forEach(enumSymbol.declarations, function (declaration) {
+                    if (declaration.kind !== 224) {
+                        return false;
+                    }
+                    var enumDeclaration = declaration;
+                    if (!enumDeclaration.members.length) {
+                        return false;
+                    }
+                    var firstEnumMember = enumDeclaration.members[0];
+                    if (!firstEnumMember.initializer) {
+                        if (seenEnumMissingInitialInitializer_1) {
+                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
+                        }
+                        else {
+                            seenEnumMissingInitialInitializer_1 = true;
+                        }
+                    }
+                });
+            }
+        }
+        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
+            var declarations = symbol.declarations;
+            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
+                var declaration = declarations_5[_i];
+                if ((declaration.kind === 221 ||
+                    (declaration.kind === 220 && ts.nodeIsPresent(declaration.body))) &&
+                    !ts.isInAmbientContext(declaration)) {
+                    return declaration;
+                }
+            }
+            return undefined;
+        }
+        function inSameLexicalScope(node1, node2) {
+            var container1 = ts.getEnclosingBlockScopeContainer(node1);
+            var container2 = ts.getEnclosingBlockScopeContainer(node2);
+            if (isGlobalSourceFile(container1)) {
+                return isGlobalSourceFile(container2);
+            }
+            else if (isGlobalSourceFile(container2)) {
+                return false;
+            }
+            else {
+                return container1 === container2;
+            }
+        }
+        function checkModuleDeclaration(node) {
+            if (produceDiagnostics) {
+                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
+                var inAmbientContext = ts.isInAmbientContext(node);
+                if (isGlobalAugmentation && !inAmbientContext) {
+                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
+                }
+                var isAmbientExternalModule = ts.isAmbientModule(node);
+                var contextErrorMessage = isAmbientExternalModule
+                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
+                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
+                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
+                    return;
+                }
+                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
+                    if (!inAmbientContext && node.name.kind === 9) {
+                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
+                    }
+                }
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                if (symbol.flags & 512
+                    && symbol.declarations.length > 1
+                    && !inAmbientContext
+                    && ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
+                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
+                    if (firstNonAmbientClassOrFunc) {
+                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
+                        }
+                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
+                        }
+                    }
+                    var mergedClass = ts.getDeclarationOfKind(symbol, 221);
+                    if (mergedClass &&
+                        inSameLexicalScope(node, mergedClass)) {
+                        getNodeLinks(node).flags |= 32768;
+                    }
+                }
+                if (isAmbientExternalModule) {
+                    if (ts.isExternalModuleAugmentation(node)) {
+                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432);
+                        if (checkBody) {
+                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
+                                var statement = _a[_i];
+                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
+                            }
+                        }
+                    }
+                    else if (isGlobalSourceFile(node.parent)) {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
+                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
+                        }
+                    }
+                    else {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else {
+                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
+                        }
+                    }
+                }
+            }
+            checkSourceElement(node.body);
+        }
+        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
+            switch (node.kind) {
+                case 200:
+                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                        var decl = _a[_i];
+                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
+                    }
+                    break;
+                case 235:
+                case 236:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
+                    break;
+                case 229:
+                case 230:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
+                    break;
+                case 169:
+                case 218:
+                    var name_19 = node.name;
+                    if (ts.isBindingPattern(name_19)) {
+                        for (var _b = 0, _c = name_19.elements; _b < _c.length; _b++) {
+                            var el = _c[_b];
+                            checkModuleAugmentationElement(el, isGlobalAugmentation);
+                        }
+                        break;
+                    }
+                case 221:
+                case 224:
+                case 220:
+                case 222:
+                case 225:
+                case 223:
+                    if (isGlobalAugmentation) {
+                        return;
+                    }
+                    var symbol = getSymbolOfNode(node);
+                    if (symbol) {
+                        var reportError = !(symbol.flags & 33554432);
+                        if (!reportError) {
+                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
+                        }
+                    }
+                    break;
+            }
+        }
+        function getFirstIdentifier(node) {
+            while (true) {
+                if (node.kind === 139) {
+                    node = node.left;
+                }
+                else if (node.kind === 172) {
+                    node = node.expression;
+                }
+                else {
+                    break;
+                }
+            }
+            ts.Debug.assert(node.kind === 69);
+            return node;
+        }
+        function checkExternalImportOrExportDeclaration(node) {
+            var moduleName = ts.getExternalModuleName(node);
+            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9) {
+                error(moduleName, ts.Diagnostics.String_literal_expected);
+                return false;
+            }
+            var inAmbientExternalModule = node.parent.kind === 226 && ts.isAmbientModule(node.parent.parent);
+            if (node.parent.kind !== 256 && !inAmbientExternalModule) {
+                error(moduleName, node.kind === 236 ?
+                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
+                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
+                return false;
+            }
+            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
+                if (!isTopLevelInExternalModuleAugmentation(node)) {
+                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkAliasSymbol(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target !== unknownSymbol) {
+                var excludedMeanings = (symbol.flags & (107455 | 1048576) ? 107455 : 0) |
+                    (symbol.flags & 793056 ? 793056 : 0) |
+                    (symbol.flags & 1536 ? 1536 : 0);
+                if (target.flags & excludedMeanings) {
+                    var message = node.kind === 238 ?
+                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
+                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
+                    error(node, message, symbolToString(symbol));
+                }
+            }
+        }
+        function checkImportBinding(node) {
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkAliasSymbol(node);
+        }
+        function checkImportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
+            }
+            if (checkExternalImportOrExportDeclaration(node)) {
+                var importClause = node.importClause;
+                if (importClause) {
+                    if (importClause.name) {
+                        checkImportBinding(importClause);
+                    }
+                    if (importClause.namedBindings) {
+                        if (importClause.namedBindings.kind === 232) {
+                            checkImportBinding(importClause.namedBindings);
+                        }
+                        else {
+                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
+                        }
+                    }
+                }
+            }
+        }
+        function checkImportEqualsDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                return;
+            }
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
+                checkImportBinding(node);
+                if (node.flags & 1) {
+                    markExportAsReferenced(node);
+                }
+                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    var target = resolveAlias(getSymbolOfNode(node));
+                    if (target !== unknownSymbol) {
+                        if (target.flags & 107455) {
+                            var moduleName = getFirstIdentifier(node.moduleReference);
+                            if (!(resolveEntityName(moduleName, 107455 | 1536).flags & 1536)) {
+                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
+                            }
+                        }
+                        if (target.flags & 793056) {
+                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
+                        }
+                    }
+                }
+                else {
+                    if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
+                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
+                    }
+                }
+            }
+        }
+        function checkExportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
+            }
+            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
+                if (node.exportClause) {
+                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
+                    var inAmbientExternalModule = node.parent.kind === 226 && ts.isAmbientModule(node.parent.parent);
+                    if (node.parent.kind !== 256 && !inAmbientExternalModule) {
+                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
+                    }
+                }
+                else {
+                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
+                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
+                    }
+                }
+            }
+        }
+        function checkGrammarModuleElementContext(node, errorMessage) {
+            if (node.parent.kind !== 256 && node.parent.kind !== 226 && node.parent.kind !== 225) {
+                return grammarErrorOnFirstToken(node, errorMessage);
+            }
+        }
+        function checkExportSpecifier(node) {
+            checkAliasSymbol(node);
+            if (!node.parent.parent.moduleSpecifier) {
+                var exportedName = node.propertyName || node.name;
+                var symbol = resolveName(exportedName, exportedName.text, 107455 | 793056 | 1536 | 8388608, undefined, undefined);
+                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
+                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
+                }
+                else {
+                    markExportAsReferenced(node);
+                }
+            }
+        }
+        function checkExportAssignment(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
+                return;
+            }
+            var container = node.parent.kind === 256 ? node.parent : node.parent.parent;
+            if (container.kind === 225 && !ts.isAmbientModule(container)) {
+                error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
+            }
+            if (node.expression.kind === 69) {
+                markExportAsReferenced(node);
+            }
+            else {
+                checkExpressionCached(node.expression);
+            }
+            checkExternalModuleExports(container);
+            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
+                if (modulekind === ts.ModuleKind.ES6) {
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
+                }
+                else if (modulekind === ts.ModuleKind.System) {
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
+                }
+            }
+        }
+        function hasExportedMembers(moduleSymbol) {
+            for (var id in moduleSymbol.exports) {
+                if (id !== "export=") {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkExternalModuleExports(node) {
+            var moduleSymbol = getSymbolOfNode(node);
+            var links = getSymbolLinks(moduleSymbol);
+            if (!links.exportsChecked) {
+                var exportEqualsSymbol = moduleSymbol.exports["export="];
+                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
+                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
+                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
+                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
+                    }
+                }
+                var exports = getExportsOfModule(moduleSymbol);
+                for (var id in exports) {
+                    if (id === "__export") {
+                        continue;
+                    }
+                    var _a = exports[id], declarations = _a.declarations, flags = _a.flags;
+                    if (flags & (1536 | 64 | 384)) {
+                        continue;
+                    }
+                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
+                    if (flags & 524288 && exportedDeclarationsCount <= 2) {
+                        continue;
+                    }
+                    if (exportedDeclarationsCount > 1) {
+                        for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
+                            var declaration = declarations_6[_i];
+                            if (isNotOverload(declaration)) {
+                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
+                            }
+                        }
+                    }
+                }
+                links.exportsChecked = true;
+            }
+            function isNotOverload(declaration) {
+                return declaration.kind !== 220 || !!declaration.body;
+            }
+        }
+        function checkSourceElement(node) {
+            if (!node) {
+                return;
+            }
+            var kind = node.kind;
+            if (cancellationToken) {
+                switch (kind) {
+                    case 225:
+                    case 221:
+                    case 222:
+                    case 220:
+                        cancellationToken.throwIfCancellationRequested();
+                }
+            }
+            switch (kind) {
+                case 141:
+                    return checkTypeParameter(node);
+                case 142:
+                    return checkParameter(node);
+                case 145:
+                case 144:
+                    return checkPropertyDeclaration(node);
+                case 156:
+                case 157:
+                case 151:
+                case 152:
+                    return checkSignatureDeclaration(node);
+                case 153:
+                    return checkSignatureDeclaration(node);
+                case 147:
+                case 146:
+                    return checkMethodDeclaration(node);
+                case 148:
+                    return checkConstructorDeclaration(node);
+                case 149:
+                case 150:
+                    return checkAccessorDeclaration(node);
+                case 155:
+                    return checkTypeReferenceNode(node);
+                case 154:
+                    return checkTypePredicate(node);
+                case 158:
+                    return checkTypeQuery(node);
+                case 159:
+                    return checkTypeLiteral(node);
+                case 160:
+                    return checkArrayType(node);
+                case 161:
+                    return checkTupleType(node);
+                case 162:
+                case 163:
+                    return checkUnionOrIntersectionType(node);
+                case 164:
+                    return checkSourceElement(node.type);
+                case 220:
+                    return checkFunctionDeclaration(node);
+                case 199:
+                case 226:
+                    return checkBlock(node);
+                case 200:
+                    return checkVariableStatement(node);
+                case 202:
+                    return checkExpressionStatement(node);
+                case 203:
+                    return checkIfStatement(node);
+                case 204:
+                    return checkDoStatement(node);
+                case 205:
+                    return checkWhileStatement(node);
+                case 206:
+                    return checkForStatement(node);
+                case 207:
+                    return checkForInStatement(node);
+                case 208:
+                    return checkForOfStatement(node);
+                case 209:
+                case 210:
+                    return checkBreakOrContinueStatement(node);
+                case 211:
+                    return checkReturnStatement(node);
+                case 212:
+                    return checkWithStatement(node);
+                case 213:
+                    return checkSwitchStatement(node);
+                case 214:
+                    return checkLabeledStatement(node);
+                case 215:
+                    return checkThrowStatement(node);
+                case 216:
+                    return checkTryStatement(node);
+                case 218:
+                    return checkVariableDeclaration(node);
+                case 169:
+                    return checkBindingElement(node);
+                case 221:
+                    return checkClassDeclaration(node);
+                case 222:
+                    return checkInterfaceDeclaration(node);
+                case 223:
+                    return checkTypeAliasDeclaration(node);
+                case 224:
+                    return checkEnumDeclaration(node);
+                case 225:
+                    return checkModuleDeclaration(node);
+                case 230:
+                    return checkImportDeclaration(node);
+                case 229:
+                    return checkImportEqualsDeclaration(node);
+                case 236:
+                    return checkExportDeclaration(node);
+                case 235:
+                    return checkExportAssignment(node);
+                case 201:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 217:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 239:
+                    return checkMissingDeclaration(node);
+            }
+        }
+        function checkNodeDeferred(node) {
+            if (deferredNodes) {
+                deferredNodes.push(node);
+            }
+        }
+        function checkDeferredNodes() {
+            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
+                var node = deferredNodes_1[_i];
+                switch (node.kind) {
+                    case 179:
+                    case 180:
+                    case 147:
+                    case 146:
+                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
+                        break;
+                    case 149:
+                    case 150:
+                        checkAccessorDeferred(node);
+                        break;
+                    case 192:
+                        checkClassExpressionDeferred(node);
+                        break;
+                }
+            }
+        }
+        function checkSourceFile(node) {
+            var start = new Date().getTime();
+            checkSourceFileWorker(node);
+            ts.checkTime += new Date().getTime() - start;
+        }
+        function checkSourceFileWorker(node) {
+            var links = getNodeLinks(node);
+            if (!(links.flags & 1)) {
+                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
+                    return;
+                }
+                checkGrammarSourceFile(node);
+                potentialThisCollisions.length = 0;
+                deferredNodes = [];
+                ts.forEach(node.statements, checkSourceElement);
+                checkDeferredNodes();
+                deferredNodes = undefined;
+                if (ts.isExternalOrCommonJsModule(node)) {
+                    checkExternalModuleExports(node);
+                }
+                if (potentialThisCollisions.length) {
+                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
+                    potentialThisCollisions.length = 0;
+                }
+                links.flags |= 1;
+            }
+        }
+        function getDiagnostics(sourceFile, ct) {
+            try {
+                cancellationToken = ct;
+                return getDiagnosticsWorker(sourceFile);
+            }
+            finally {
+                cancellationToken = undefined;
+            }
+        }
+        function getDiagnosticsWorker(sourceFile) {
+            throwIfNonDiagnosticsProducing();
+            if (sourceFile) {
+                checkSourceFile(sourceFile);
+                return diagnostics.getDiagnostics(sourceFile.fileName);
+            }
+            ts.forEach(host.getSourceFiles(), checkSourceFile);
+            return diagnostics.getDiagnostics();
+        }
+        function getGlobalDiagnostics() {
+            throwIfNonDiagnosticsProducing();
+            return diagnostics.getGlobalDiagnostics();
+        }
+        function throwIfNonDiagnosticsProducing() {
+            if (!produceDiagnostics) {
+                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
+            }
+        }
+        function isInsideWithStatementBody(node) {
+            if (node) {
+                while (node.parent) {
+                    if (node.parent.kind === 212 && node.parent.statement === node) {
+                        return true;
+                    }
+                    node = node.parent;
+                }
+            }
+            return false;
+        }
+        function getSymbolsInScope(location, meaning) {
+            var symbols = {};
+            var memberFlags = 0;
+            if (isInsideWithStatementBody(location)) {
+                return [];
+            }
+            populateSymbols();
+            return symbolsToArray(symbols);
+            function populateSymbols() {
+                while (location) {
+                    if (location.locals && !isGlobalSourceFile(location)) {
+                        copySymbols(location.locals, meaning);
+                    }
+                    switch (location.kind) {
+                        case 256:
+                            if (!ts.isExternalOrCommonJsModule(location)) {
+                                break;
+                            }
+                        case 225:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931);
+                            break;
+                        case 224:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8);
+                            break;
+                        case 192:
+                            var className = location.name;
+                            if (className) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                        case 221:
+                        case 222:
+                            if (!(memberFlags & 32)) {
+                                copySymbols(getSymbolOfNode(location).members, meaning & 793056);
+                            }
+                            break;
+                        case 179:
+                            var funcName = location.name;
+                            if (funcName) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                            break;
+                    }
+                    if (ts.introducesArgumentsExoticObject(location)) {
+                        copySymbol(argumentsSymbol, meaning);
+                    }
+                    memberFlags = location.flags;
+                    location = location.parent;
+                }
+                copySymbols(globals, meaning);
+            }
+            function copySymbol(symbol, meaning) {
+                if (symbol.flags & meaning) {
+                    var id = symbol.name;
+                    if (!ts.hasProperty(symbols, id)) {
+                        symbols[id] = symbol;
+                    }
+                }
+            }
+            function copySymbols(source, meaning) {
+                if (meaning) {
+                    for (var id in source) {
+                        var symbol = source[id];
+                        copySymbol(symbol, meaning);
+                    }
+                }
+            }
+        }
+        function isTypeDeclarationName(name) {
+            return name.kind === 69 &&
+                isTypeDeclaration(name.parent) &&
+                name.parent.name === name;
+        }
+        function isTypeDeclaration(node) {
+            switch (node.kind) {
+                case 141:
+                case 221:
+                case 222:
+                case 223:
+                case 224:
+                    return true;
+            }
+        }
+        function isTypeReferenceIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 139) {
+                node = node.parent;
+            }
+            return node.parent && (node.parent.kind === 155 || node.parent.kind === 267);
+        }
+        function isHeritageClauseElementIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 172) {
+                node = node.parent;
+            }
+            return node.parent && node.parent.kind === 194;
+        }
+        function forEachEnclosingClass(node, callback) {
+            var result;
+            while (true) {
+                node = ts.getContainingClass(node);
+                if (!node)
+                    break;
+                if (result = callback(node))
+                    break;
+            }
+            return result;
+        }
+        function isNodeWithinClass(node, classDeclaration) {
+            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
+        }
+        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
+            while (nodeOnRightSide.parent.kind === 139) {
+                nodeOnRightSide = nodeOnRightSide.parent;
+            }
+            if (nodeOnRightSide.parent.kind === 229) {
+                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            if (nodeOnRightSide.parent.kind === 235) {
+                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            return undefined;
+        }
+        function isInRightSideOfImportOrExportAssignment(node) {
+            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
+        }
+        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
+            if (ts.isDeclarationName(entityName)) {
+                return getSymbolOfNode(entityName.parent);
+            }
+            if (ts.isInJavaScriptFile(entityName) && entityName.parent.kind === 172) {
+                var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
+                switch (specialPropertyAssignmentKind) {
+                    case 1:
+                    case 3:
+                        return getSymbolOfNode(entityName.parent);
+                    case 4:
+                    case 2:
+                        return getSymbolOfNode(entityName.parent.parent);
+                    default:
+                }
+            }
+            if (entityName.parent.kind === 235) {
+                return resolveEntityName(entityName, 107455 | 793056 | 1536 | 8388608);
+            }
+            if (entityName.kind !== 172) {
+                if (isInRightSideOfImportOrExportAssignment(entityName)) {
+                    var importEqualsDeclaration = ts.getAncestor(entityName, 229);
+                    ts.Debug.assert(importEqualsDeclaration !== undefined);
+                    return getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importEqualsDeclaration, true);
+                }
+            }
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            if (isHeritageClauseElementIdentifier(entityName)) {
+                var meaning = 0;
+                if (entityName.parent.kind === 194) {
+                    meaning = 793056;
+                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                        meaning |= 107455;
+                    }
+                }
+                else {
+                    meaning = 1536;
+                }
+                meaning |= 8388608;
+                return resolveEntityName(entityName, meaning);
+            }
+            else if (ts.isExpression(entityName)) {
+                if (ts.nodeIsMissing(entityName)) {
+                    return undefined;
+                }
+                if (entityName.kind === 69) {
+                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
+                        return getIntrinsicTagSymbol(entityName.parent);
+                    }
+                    return resolveEntityName(entityName, 107455, false, true);
+                }
+                else if (entityName.kind === 172) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkPropertyAccessExpression(entityName);
+                    }
+                    return getNodeLinks(entityName).resolvedSymbol;
+                }
+                else if (entityName.kind === 139) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkQualifiedName(entityName);
+                    }
+                    return getNodeLinks(entityName).resolvedSymbol;
+                }
+            }
+            else if (isTypeReferenceIdentifier(entityName)) {
+                var meaning = (entityName.parent.kind === 155 || entityName.parent.kind === 267) ? 793056 : 1536;
+                return resolveEntityName(entityName, meaning, false, true);
+            }
+            else if (entityName.parent.kind === 246) {
+                return getJsxAttributePropertySymbol(entityName.parent);
+            }
+            if (entityName.parent.kind === 154) {
+                return resolveEntityName(entityName, 1);
+            }
+            return undefined;
+        }
+        function getSymbolAtLocation(node) {
+            if (node.kind === 256) {
+                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
+            }
+            if (isInsideWithStatementBody(node)) {
+                return undefined;
+            }
+            if (ts.isDeclarationName(node)) {
+                return getSymbolOfNode(node.parent);
+            }
+            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
+                return getSymbolOfNode(node.parent.parent);
+            }
+            if (node.kind === 69) {
+                if (isInRightSideOfImportOrExportAssignment(node)) {
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                }
+                else if (node.parent.kind === 169 &&
+                    node.parent.parent.kind === 167 &&
+                    node === node.parent.propertyName) {
+                    var typeOfPattern = getTypeOfNode(node.parent.parent);
+                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
+                    if (propertyDeclaration) {
+                        return propertyDeclaration;
+                    }
+                }
+            }
+            switch (node.kind) {
+                case 69:
+                case 172:
+                case 139:
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                case 97:
+                case 95:
+                    var type = ts.isExpression(node) ? checkExpression(node) : getTypeFromTypeNode(node);
+                    return type.symbol;
+                case 165:
+                    return getTypeFromTypeNode(node).symbol;
+                case 121:
+                    var constructorDeclaration = node.parent;
+                    if (constructorDeclaration && constructorDeclaration.kind === 148) {
+                        return constructorDeclaration.parent.symbol;
+                    }
+                    return undefined;
+                case 9:
+                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
+                        ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
+                        ((node.parent.kind === 230 || node.parent.kind === 236) &&
+                            node.parent.moduleSpecifier === node)) {
+                        return resolveExternalModuleName(node, node);
+                    }
+                case 8:
+                    if (node.parent.kind === 173 && node.parent.argumentExpression === node) {
+                        var objectType = checkExpression(node.parent.expression);
+                        if (objectType === unknownType)
+                            return undefined;
+                        var apparentType = getApparentType(objectType);
+                        if (apparentType === unknownType)
+                            return undefined;
+                        return getPropertyOfType(apparentType, node.text);
+                    }
+                    break;
+            }
+            return undefined;
+        }
+        function getShorthandAssignmentValueSymbol(location) {
+            if (location && location.kind === 254) {
+                return resolveEntityName(location.name, 107455 | 8388608);
+            }
+            return undefined;
+        }
+        function getExportSpecifierLocalTargetSymbol(node) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node) :
+                resolveEntityName(node.propertyName || node.name, 107455 | 793056 | 1536 | 8388608);
+        }
+        function getTypeOfNode(node) {
+            if (isInsideWithStatementBody(node)) {
+                return unknownType;
+            }
+            if (ts.isTypeNode(node)) {
+                return getTypeFromTypeNode(node);
+            }
+            if (ts.isExpression(node)) {
+                return getTypeOfExpression(node);
+            }
+            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
+                return getBaseTypes(getDeclaredTypeOfSymbol(getSymbolOfNode(node.parent.parent)))[0];
+            }
+            if (isTypeDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                return getDeclaredTypeOfSymbol(symbol);
+            }
+            if (isTypeDeclarationName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getDeclaredTypeOfSymbol(symbol);
+            }
+            if (ts.isDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(symbol);
+            }
+            if (ts.isDeclarationName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getTypeOfSymbol(symbol);
+            }
+            if (ts.isBindingPattern(node)) {
+                return getTypeForVariableLikeDeclaration(node.parent, true);
+            }
+            if (isInRightSideOfImportOrExportAssignment(node)) {
+                var symbol = getSymbolAtLocation(node);
+                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
+                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
+            }
+            return unknownType;
+        }
+        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
+            ts.Debug.assert(expr.kind === 171 || expr.kind === 170);
+            if (expr.parent.kind === 208) {
+                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
+            }
+            if (expr.parent.kind === 187) {
+                var iteratedType = checkExpression(expr.parent.right);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
+            }
+            if (expr.parent.kind === 253) {
+                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
+                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
+            }
+            ts.Debug.assert(expr.parent.kind === 170);
+            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
+            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, false) || unknownType;
+            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
+        }
+        function getPropertySymbolOfDestructuringAssignment(location) {
+            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
+            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
+        }
+        function getTypeOfExpression(expr) {
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
+                expr = expr.parent;
+            }
+            return checkExpression(expr);
+        }
+        function getParentTypeOfClassElement(node) {
+            var classSymbol = getSymbolOfNode(node.parent);
+            return node.flags & 32
+                ? getTypeOfSymbol(classSymbol)
+                : getDeclaredTypeOfSymbol(classSymbol);
+        }
+        function getAugmentedPropertiesOfType(type) {
+            type = getApparentType(type);
+            var propsByName = createSymbolTable(getPropertiesOfType(type));
+            if (getSignaturesOfType(type, 0).length || getSignaturesOfType(type, 1).length) {
+                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
+                    if (!ts.hasProperty(propsByName, p.name)) {
+                        propsByName[p.name] = p;
+                    }
+                });
+            }
+            return getNamedMembers(propsByName);
+        }
+        function getRootSymbols(symbol) {
+            if (symbol.flags & 268435456) {
+                var symbols_3 = [];
+                var name_20 = symbol.name;
+                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
+                    var symbol = getPropertyOfType(t, name_20);
+                    if (symbol) {
+                        symbols_3.push(symbol);
+                    }
+                });
+                return symbols_3;
+            }
+            else if (symbol.flags & 67108864) {
+                var target = void 0;
+                var next = symbol;
+                while (next = getSymbolLinks(next).target) {
+                    target = next;
+                }
+                if (target) {
+                    return [target];
+                }
+            }
+            return [symbol];
+        }
+        function isArgumentsLocalBinding(node) {
+            return getReferencedValueSymbol(node) === argumentsSymbol;
+        }
+        function moduleExportsSomeValue(moduleReferenceExpression) {
+            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
+            if (!moduleSymbol) {
+                return true;
+            }
+            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
+            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
+            var symbolLinks = getSymbolLinks(moduleSymbol);
+            if (symbolLinks.exportsSomeValue === undefined) {
+                symbolLinks.exportsSomeValue = hasExportAssignment
+                    ? !!(moduleSymbol.flags & 107455)
+                    : ts.forEachValue(getExportsOfModule(moduleSymbol), isValue);
+            }
+            return symbolLinks.exportsSomeValue;
+            function isValue(s) {
+                s = resolveSymbol(s);
+                return s && !!(s.flags & 107455);
+            }
+        }
+        function getReferencedExportContainer(node) {
+            var symbol = getReferencedValueSymbol(node);
+            if (symbol) {
+                if (symbol.flags & 1048576) {
+                    var exportSymbol = getMergedSymbol(symbol.exportSymbol);
+                    if (exportSymbol.flags & 944) {
+                        return undefined;
+                    }
+                    symbol = exportSymbol;
+                }
+                var parentSymbol = getParentOfSymbol(symbol);
+                if (parentSymbol) {
+                    if (parentSymbol.flags & 512 && parentSymbol.valueDeclaration.kind === 256) {
+                        return parentSymbol.valueDeclaration;
+                    }
+                    for (var n = node.parent; n; n = n.parent) {
+                        if ((n.kind === 225 || n.kind === 224) && getSymbolOfNode(n) === parentSymbol) {
+                            return n;
+                        }
+                    }
+                }
+            }
+        }
+        function getReferencedImportDeclaration(node) {
+            var symbol = getReferencedValueSymbol(node);
+            return symbol && symbol.flags & 8388608 ? getDeclarationOfAliasSymbol(symbol) : undefined;
+        }
+        function isSymbolOfDeclarationWithCollidingName(symbol) {
+            if (symbol.flags & 418) {
+                var links = getSymbolLinks(symbol);
+                if (links.isDeclarationWithCollidingName === undefined) {
+                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (ts.isStatementWithLocals(container)) {
+                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
+                        if (!!resolveName(container.parent, symbol.name, 107455, undefined, undefined)) {
+                            links.isDeclarationWithCollidingName = true;
+                        }
+                        else if (nodeLinks_1.flags & 131072) {
+                            var isDeclaredInLoop = nodeLinks_1.flags & 262144;
+                            var inLoopInitializer = ts.isIterationStatement(container, false);
+                            var inLoopBodyBlock = container.kind === 199 && ts.isIterationStatement(container.parent, false);
+                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
+                        }
+                        else {
+                            links.isDeclarationWithCollidingName = false;
+                        }
+                    }
+                }
+                return links.isDeclarationWithCollidingName;
+            }
+            return false;
+        }
+        function getReferencedDeclarationWithCollidingName(node) {
+            var symbol = getReferencedValueSymbol(node);
+            return symbol && isSymbolOfDeclarationWithCollidingName(symbol) ? symbol.valueDeclaration : undefined;
+        }
+        function isDeclarationWithCollidingName(node) {
+            return isSymbolOfDeclarationWithCollidingName(getSymbolOfNode(node));
+        }
+        function isValueAliasDeclaration(node) {
+            switch (node.kind) {
+                case 229:
+                case 231:
+                case 232:
+                case 234:
+                case 238:
+                    return isAliasResolvedToValue(getSymbolOfNode(node));
+                case 236:
+                    var exportClause = node.exportClause;
+                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
+                case 235:
+                    return node.expression && node.expression.kind === 69 ? isAliasResolvedToValue(getSymbolOfNode(node)) : true;
+            }
+            return false;
+        }
+        function isTopLevelValueImportEqualsWithEntityName(node) {
+            if (node.parent.kind !== 256 || !ts.isInternalModuleImportEqualsDeclaration(node)) {
+                return false;
+            }
+            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
+            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
+        }
+        function isAliasResolvedToValue(symbol) {
+            var target = resolveAlias(symbol);
+            if (target === unknownSymbol) {
+                return true;
+            }
+            return target.flags & 107455 &&
+                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
+        }
+        function isConstEnumOrConstEnumOnlyModule(s) {
+            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
+        }
+        function isReferencedAliasDeclaration(node, checkChildren) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                if (getSymbolLinks(symbol).referenced) {
+                    return true;
+                }
+            }
+            if (checkChildren) {
+                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
+            }
+            return false;
+        }
+        function isImplementationOfOverload(node) {
+            if (ts.nodeIsPresent(node.body)) {
+                var symbol = getSymbolOfNode(node);
+                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
+                return signaturesOfSymbol.length > 1 ||
+                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
+            }
+            return false;
+        }
+        function getNodeCheckFlags(node) {
+            return getNodeLinks(node).flags;
+        }
+        function getEnumMemberValue(node) {
+            computeEnumMemberValues(node.parent);
+            return getNodeLinks(node).enumMemberValue;
+        }
+        function getConstantValue(node) {
+            if (node.kind === 255) {
+                return getEnumMemberValue(node);
+            }
+            var symbol = getNodeLinks(node).resolvedSymbol;
+            if (symbol && (symbol.flags & 8)) {
+                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
+                    return getEnumMemberValue(symbol.valueDeclaration);
+                }
+            }
+            return undefined;
+        }
+        function isFunctionType(type) {
+            return type.flags & 80896 && getSignaturesOfType(type, 0).length > 0;
+        }
+        function getTypeReferenceSerializationKind(typeName) {
+            var valueSymbol = resolveEntityName(typeName, 107455, true);
+            var constructorType = valueSymbol ? getTypeOfSymbol(valueSymbol) : undefined;
+            if (constructorType && isConstructorType(constructorType)) {
+                return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
+            }
+            var typeSymbol = resolveEntityName(typeName, 793056, true);
+            if (!typeSymbol) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+            var type = getDeclaredTypeOfSymbol(typeSymbol);
+            if (type === unknownType) {
+                return ts.TypeReferenceSerializationKind.Unknown;
+            }
+            else if (type.flags & 1) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+            else if (isTypeOfKind(type, 16)) {
+                return ts.TypeReferenceSerializationKind.VoidType;
+            }
+            else if (isTypeOfKind(type, 8)) {
+                return ts.TypeReferenceSerializationKind.BooleanType;
+            }
+            else if (isTypeOfKind(type, 132)) {
+                return ts.TypeReferenceSerializationKind.NumberLikeType;
+            }
+            else if (isTypeOfKind(type, 258)) {
+                return ts.TypeReferenceSerializationKind.StringLikeType;
+            }
+            else if (isTypeOfKind(type, 8192)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            }
+            else if (isTypeOfKind(type, 16777216)) {
+                return ts.TypeReferenceSerializationKind.ESSymbolType;
+            }
+            else if (isFunctionType(type)) {
+                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
+            }
+            else if (isArrayType(type)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            }
+            else {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+        }
+        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
+            var symbol = getSymbolOfNode(declaration);
+            var type = symbol && !(symbol.flags & (2048 | 131072))
+                ? getTypeOfSymbol(symbol)
+                : unknownType;
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        }
+        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
+            var signature = getSignatureFromDeclaration(signatureDeclaration);
+            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
+        }
+        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
+            var type = getWidenedType(getTypeOfExpression(expr));
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        }
+        function writeBaseConstructorTypeOfClass(node, enclosingDeclaration, flags, writer) {
+            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(node));
+            resolveBaseTypesOfClass(classType);
+            var baseType = classType.resolvedBaseTypes.length ? classType.resolvedBaseTypes[0] : unknownType;
+            getSymbolDisplayBuilder().buildTypeDisplay(baseType, writer, enclosingDeclaration, flags);
+        }
+        function hasGlobalName(name) {
+            return ts.hasProperty(globals, name);
+        }
+        function getReferencedValueSymbol(reference) {
+            return getNodeLinks(reference).resolvedSymbol ||
+                resolveName(reference, reference.text, 107455 | 1048576 | 8388608, undefined, undefined);
+        }
+        function getReferencedValueDeclaration(reference) {
+            ts.Debug.assert(!ts.nodeIsSynthesized(reference));
+            var symbol = getReferencedValueSymbol(reference);
+            return symbol && getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
+        }
+        function createResolver() {
+            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
+            var fileToDirective;
+            if (resolvedTypeReferenceDirectives) {
+                fileToDirective = ts.createFileMap();
+                for (var key in resolvedTypeReferenceDirectives) {
+                    if (!ts.hasProperty(resolvedTypeReferenceDirectives, key)) {
+                        continue;
+                    }
+                    var resolvedDirective = resolvedTypeReferenceDirectives[key];
+                    if (!resolvedDirective) {
+                        continue;
+                    }
+                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
+                    fileToDirective.set(file.path, key);
+                }
+            }
+            return {
+                getReferencedExportContainer: getReferencedExportContainer,
+                getReferencedImportDeclaration: getReferencedImportDeclaration,
+                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
+                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
+                isValueAliasDeclaration: isValueAliasDeclaration,
+                hasGlobalName: hasGlobalName,
+                isReferencedAliasDeclaration: isReferencedAliasDeclaration,
+                getNodeCheckFlags: getNodeCheckFlags,
+                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
+                isDeclarationVisible: isDeclarationVisible,
+                isImplementationOfOverload: isImplementationOfOverload,
+                writeTypeOfDeclaration: writeTypeOfDeclaration,
+                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
+                writeTypeOfExpression: writeTypeOfExpression,
+                writeBaseConstructorTypeOfClass: writeBaseConstructorTypeOfClass,
+                isSymbolAccessible: isSymbolAccessible,
+                isEntityNameVisible: isEntityNameVisible,
+                getConstantValue: getConstantValue,
+                collectLinkedAliases: collectLinkedAliases,
+                getReferencedValueDeclaration: getReferencedValueDeclaration,
+                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
+                isOptionalParameter: isOptionalParameter,
+                moduleExportsSomeValue: moduleExportsSomeValue,
+                isArgumentsLocalBinding: isArgumentsLocalBinding,
+                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
+                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
+                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol
+            };
+            function getTypeReferenceDirectivesForEntityName(node) {
+                if (!fileToDirective) {
+                    return undefined;
+                }
+                var meaning = (node.kind === 172) || (node.kind === 69 && isInTypeQuery(node))
+                    ? 107455 | 1048576
+                    : 793056 | 1536;
+                var symbol = resolveEntityName(node, meaning, true);
+                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
+            }
+            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
+                if (!fileToDirective) {
+                    return undefined;
+                }
+                if (!isSymbolFromTypeDeclarationFile(symbol)) {
+                    return undefined;
+                }
+                var typeReferenceDirectives;
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    if (decl.symbol && decl.symbol.flags & meaning) {
+                        var file = ts.getSourceFileOfNode(decl);
+                        var typeReferenceDirective = fileToDirective.get(file.path);
+                        if (typeReferenceDirective) {
+                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
+                        }
+                    }
+                }
+                return typeReferenceDirectives;
+            }
+            function isSymbolFromTypeDeclarationFile(symbol) {
+                if (!symbol.declarations) {
+                    return false;
+                }
+                var current = symbol;
+                while (true) {
+                    var parent_12 = getParentOfSymbol(current);
+                    if (parent_12) {
+                        current = parent_12;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                if (current.valueDeclaration && current.valueDeclaration.kind === 256 && current.flags & 512) {
+                    return false;
+                }
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var file = ts.getSourceFileOfNode(decl);
+                    if (fileToDirective.contains(file.path)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+        }
+        function getExternalModuleFileFromDeclaration(declaration) {
+            var specifier = ts.getExternalModuleName(declaration);
+            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, undefined);
+            if (!moduleSymbol) {
+                return undefined;
+            }
+            return ts.getDeclarationOfKind(moduleSymbol, 256);
+        }
+        function initializeTypeChecker() {
+            ts.forEach(host.getSourceFiles(), function (file) {
+                ts.bindSourceFile(file, compilerOptions);
+            });
+            var augmentations;
+            ts.forEach(host.getSourceFiles(), function (file) {
+                if (!ts.isExternalOrCommonJsModule(file)) {
+                    mergeSymbolTable(globals, file.locals);
+                }
+                if (file.patternAmbientModules && file.patternAmbientModules.length) {
+                    patternAmbientModules = ts.concatenate(patternAmbientModules, file.patternAmbientModules);
+                }
+                if (file.moduleAugmentations.length) {
+                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
+                }
+                if (file.symbol && file.symbol.globalExports) {
+                    mergeSymbolTable(globals, file.symbol.globalExports);
+                }
+            });
+            if (augmentations) {
+                for (var _i = 0, augmentations_1 = augmentations; _i < augmentations_1.length; _i++) {
+                    var list = augmentations_1[_i];
+                    for (var _a = 0, list_2 = list; _a < list_2.length; _a++) {
+                        var augmentation = list_2[_a];
+                        mergeModuleAugmentation(augmentation);
+                    }
+                }
+            }
+            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
+            getSymbolLinks(undefinedSymbol).type = undefinedWideningType;
+            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
+            getSymbolLinks(unknownSymbol).type = unknownType;
+            globalArrayType = getGlobalType("Array", 1);
+            globalObjectType = getGlobalType("Object");
+            globalFunctionType = getGlobalType("Function");
+            globalStringType = getGlobalType("String");
+            globalNumberType = getGlobalType("Number");
+            globalBooleanType = getGlobalType("Boolean");
+            globalRegExpType = getGlobalType("RegExp");
+            jsxElementType = getExportedTypeFromNamespace("JSX", JsxNames.Element);
+            getGlobalClassDecoratorType = ts.memoize(function () { return getGlobalType("ClassDecorator"); });
+            getGlobalPropertyDecoratorType = ts.memoize(function () { return getGlobalType("PropertyDecorator"); });
+            getGlobalMethodDecoratorType = ts.memoize(function () { return getGlobalType("MethodDecorator"); });
+            getGlobalParameterDecoratorType = ts.memoize(function () { return getGlobalType("ParameterDecorator"); });
+            getGlobalTypedPropertyDescriptorType = ts.memoize(function () { return getGlobalType("TypedPropertyDescriptor", 1); });
+            getGlobalESSymbolConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Symbol"); });
+            getGlobalPromiseType = ts.memoize(function () { return getGlobalType("Promise", 1); });
+            tryGetGlobalPromiseType = ts.memoize(function () { return getGlobalSymbol("Promise", 793056, undefined) && getGlobalPromiseType(); });
+            getGlobalPromiseLikeType = ts.memoize(function () { return getGlobalType("PromiseLike", 1); });
+            getInstantiatedGlobalPromiseLikeType = ts.memoize(createInstantiatedPromiseLikeType);
+            getGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Promise"); });
+            getGlobalPromiseConstructorLikeType = ts.memoize(function () { return getGlobalType("PromiseConstructorLike"); });
+            getGlobalThenableType = ts.memoize(createThenableType);
+            getGlobalTemplateStringsArrayType = ts.memoize(function () { return getGlobalType("TemplateStringsArray"); });
+            if (languageVersion >= 2) {
+                getGlobalESSymbolType = ts.memoize(function () { return getGlobalType("Symbol"); });
+                getGlobalIterableType = ts.memoize(function () { return getGlobalType("Iterable", 1); });
+                getGlobalIteratorType = ts.memoize(function () { return getGlobalType("Iterator", 1); });
+                getGlobalIterableIteratorType = ts.memoize(function () { return getGlobalType("IterableIterator", 1); });
+            }
+            else {
+                getGlobalESSymbolType = ts.memoize(function () { return emptyObjectType; });
+                getGlobalIterableType = ts.memoize(function () { return emptyGenericType; });
+                getGlobalIteratorType = ts.memoize(function () { return emptyGenericType; });
+                getGlobalIterableIteratorType = ts.memoize(function () { return emptyGenericType; });
+            }
+            anyArrayType = createArrayType(anyType);
+            var symbol = getGlobalSymbol("ReadonlyArray", 793056, undefined);
+            globalReadonlyArrayType = symbol && getTypeOfGlobalSymbol(symbol, 1);
+            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
+        }
+        function createInstantiatedPromiseLikeType() {
+            var promiseLikeType = getGlobalPromiseLikeType();
+            if (promiseLikeType !== emptyGenericType) {
+                return createTypeReference(promiseLikeType, [anyType]);
+            }
+            return emptyObjectType;
+        }
+        function createThenableType() {
+            var thenPropertySymbol = createSymbol(67108864 | 4, "then");
+            getSymbolLinks(thenPropertySymbol).type = globalFunctionType;
+            var thenableType = createObjectType(65536);
+            thenableType.properties = [thenPropertySymbol];
+            thenableType.members = createSymbolTable(thenableType.properties);
+            thenableType.callSignatures = [];
+            thenableType.constructSignatures = [];
+            return thenableType;
+        }
+        function checkGrammarDecorators(node) {
+            if (!node.decorators) {
+                return false;
+            }
+            if (!ts.nodeCanBeDecorated(node)) {
+                if (node.kind === 147 && !ts.nodeIsPresent(node.body)) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
+                }
+                else {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
+                }
+            }
+            else if (node.kind === 149 || node.kind === 150) {
+                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
+                }
+            }
+            return false;
+        }
+        function checkGrammarModifiers(node) {
+            switch (node.kind) {
+                case 149:
+                case 150:
+                case 148:
+                case 145:
+                case 144:
+                case 147:
+                case 146:
+                case 153:
+                case 225:
+                case 230:
+                case 229:
+                case 236:
+                case 235:
+                case 179:
+                case 180:
+                case 142:
+                    break;
+                case 220:
+                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 118) &&
+                        node.parent.kind !== 226 && node.parent.kind !== 256) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                case 221:
+                case 222:
+                case 200:
+                case 223:
+                    if (node.modifiers && node.parent.kind !== 226 && node.parent.kind !== 256) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                case 224:
+                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 74) &&
+                        node.parent.kind !== 226 && node.parent.kind !== 256) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                default:
+                    return false;
+            }
+            if (!node.modifiers) {
+                return;
+            }
+            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
+            var flags = 0;
+            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
+                var modifier = _a[_i];
+                if (modifier.kind !== 128) {
+                    if (node.kind === 144 || node.kind === 146) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
+                    }
+                    if (node.kind === 153) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
+                    }
+                }
+                switch (modifier.kind) {
+                    case 74:
+                        if (node.kind !== 224 && node.parent.kind === 221) {
+                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(74));
+                        }
+                        break;
+                    case 112:
+                    case 111:
+                    case 110:
+                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
+                        if (modifier.kind === 111) {
+                            lastProtected = modifier;
+                        }
+                        else if (modifier.kind === 110) {
+                            lastPrivate = modifier;
+                        }
+                        if (flags & 28) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
+                        }
+                        else if (flags & 32) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
+                        }
+                        else if (flags & 64) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
+                        }
+                        else if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
+                        }
+                        else if (node.parent.kind === 226 || node.parent.kind === 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
+                        }
+                        else if (flags & 128) {
+                            if (modifier.kind === 110) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
+                            }
+                            else {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
+                            }
+                        }
+                        flags |= ts.modifierToFlag(modifier.kind);
+                        break;
+                    case 113:
+                        if (flags & 32) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
+                        }
+                        else if (flags & 64) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
+                        }
+                        else if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
+                        }
+                        else if (node.parent.kind === 226 || node.parent.kind === 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
+                        }
+                        else if (node.kind === 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
+                        }
+                        else if (flags & 128) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                        }
+                        flags |= 32;
+                        lastStatic = modifier;
+                        break;
+                    case 128:
+                        if (flags & 64) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
+                        }
+                        else if (node.kind !== 145 && node.kind !== 144 && node.kind !== 153 && node.kind !== 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
+                        }
+                        flags |= 64;
+                        lastReadonly = modifier;
+                        break;
+                    case 82:
+                        if (flags & 1) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
+                        }
+                        else if (flags & 2) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
+                        }
+                        else if (flags & 128) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
+                        }
+                        else if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
+                        }
+                        else if (node.parent.kind === 221) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
+                        }
+                        else if (node.kind === 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
+                        }
+                        flags |= 1;
+                        break;
+                    case 122:
+                        if (flags & 2) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
+                        }
+                        else if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.parent.kind === 221) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
+                        }
+                        else if (node.kind === 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
+                        }
+                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 226) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
+                        }
+                        flags |= 2;
+                        lastDeclare = modifier;
+                        break;
+                    case 115:
+                        if (flags & 128) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
+                        }
+                        if (node.kind !== 221) {
+                            if (node.kind !== 147 &&
+                                node.kind !== 145 &&
+                                node.kind !== 149 &&
+                                node.kind !== 150) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
+                            }
+                            if (!(node.parent.kind === 221 && node.parent.flags & 128)) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
+                            }
+                            if (flags & 32) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                            }
+                            if (flags & 8) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
+                            }
+                        }
+                        flags |= 128;
+                        break;
+                    case 118:
+                        if (flags & 256) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
+                        }
+                        else if (flags & 2 || ts.isInAmbientContext(node.parent)) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.kind === 142) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
+                        }
+                        flags |= 256;
+                        lastAsync = modifier;
+                        break;
+                }
+            }
+            if (node.kind === 148) {
+                if (flags & 32) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
+                }
+                if (flags & 128) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
+                }
+                else if (flags & 256) {
+                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
+                }
+                else if (flags & 64) {
+                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
+                }
+                return;
+            }
+            else if ((node.kind === 230 || node.kind === 229) && flags & 2) {
+                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
+            }
+            else if (node.kind === 142 && (flags & 92) && ts.isBindingPattern(node.name)) {
+                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_a_binding_pattern);
+            }
+            if (flags & 256) {
+                return checkGrammarAsyncModifier(node, lastAsync);
+            }
+        }
+        function checkGrammarAsyncModifier(node, asyncModifier) {
+            if (languageVersion < 2) {
+                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
+            }
+            switch (node.kind) {
+                case 147:
+                case 220:
+                case 179:
+                case 180:
+                    if (!node.asteriskToken) {
+                        return false;
+                    }
+                    break;
+            }
+            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
+        }
+        function checkGrammarForDisallowedTrailingComma(list) {
+            if (list && list.hasTrailingComma) {
+                var start = list.end - ",".length;
+                var end = list.end;
+                var sourceFile = ts.getSourceFileOfNode(list[0]);
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
+            }
+        }
+        function checkGrammarTypeParameterList(node, typeParameters, file) {
+            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
+                return true;
+            }
+            if (typeParameters && typeParameters.length === 0) {
+                var start = typeParameters.pos - "<".length;
+                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
+                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
+            }
+        }
+        function checkGrammarParameterList(parameters) {
+            var seenOptionalParameter = false;
+            var parameterCount = parameters.length;
+            for (var i = 0; i < parameterCount; i++) {
+                var parameter = parameters[i];
+                if (parameter.dotDotDotToken) {
+                    if (i !== (parameterCount - 1)) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
+                    }
+                    if (ts.isBindingPattern(parameter.name)) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                    }
+                    if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
+                    }
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
+                    }
+                }
+                else if (parameter.questionToken) {
+                    seenOptionalParameter = true;
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
+                    }
+                }
+                else if (seenOptionalParameter && !parameter.initializer) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
+                }
+            }
+        }
+        function checkGrammarFunctionLikeDeclaration(node) {
+            var file = ts.getSourceFileOfNode(node);
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node, node.typeParameters, file) ||
+                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
+        }
+        function checkGrammarArrowFunction(node, file) {
+            if (node.kind === 180) {
+                var arrowFunction = node;
+                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
+                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
+                if (startLine !== endLine) {
+                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
+                }
+            }
+            return false;
+        }
+        function checkGrammarIndexSignatureParameters(node) {
+            var parameter = node.parameters[0];
+            if (node.parameters.length !== 1) {
+                if (parameter) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                }
+                else {
+                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                }
+            }
+            if (parameter.dotDotDotToken) {
+                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
+            }
+            if (parameter.flags & 1023) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
+            }
+            if (parameter.questionToken) {
+                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
+            }
+            if (parameter.initializer) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
+            }
+            if (!parameter.type) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
+            }
+            if (parameter.type.kind !== 132 && parameter.type.kind !== 130) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
+            }
+            if (!node.type) {
+                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
+            }
+        }
+        function checkGrammarIndexSignature(node) {
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
+        }
+        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
+            if (typeArguments && typeArguments.length === 0) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                var start = typeArguments.pos - "<".length;
+                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+            }
+        }
+        function checkGrammarTypeArguments(node, typeArguments) {
+            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
+                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
+        }
+        function checkGrammarForOmittedArgument(node, args) {
+            if (args) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                for (var _i = 0, args_1 = args; _i < args_1.length; _i++) {
+                    var arg = args_1[_i];
+                    if (arg.kind === 193) {
+                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
+                    }
+                }
+            }
+        }
+        function checkGrammarArguments(node, args) {
+            return checkGrammarForOmittedArgument(node, args);
+        }
+        function checkGrammarHeritageClause(node) {
+            var types = node.types;
+            if (checkGrammarForDisallowedTrailingComma(types)) {
+                return true;
+            }
+            if (types && types.length === 0) {
+                var listType = ts.tokenToString(node.token);
+                var sourceFile = ts.getSourceFileOfNode(node);
+                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
+            }
+        }
+        function checkGrammarClassDeclarationHeritageClauses(node) {
+            var seenExtendsClause = false;
+            var seenImplementsClause = false;
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 83) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
+                        }
+                        if (heritageClause.types.length > 1) {
+                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
+                        }
+                        seenExtendsClause = true;
+                    }
+                    else {
+                        ts.Debug.assert(heritageClause.token === 106);
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
+                        }
+                        seenImplementsClause = true;
+                    }
+                    checkGrammarHeritageClause(heritageClause);
+                }
+            }
+        }
+        function checkGrammarInterfaceDeclaration(node) {
+            var seenExtendsClause = false;
+            if (node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 83) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        seenExtendsClause = true;
+                    }
+                    else {
+                        ts.Debug.assert(heritageClause.token === 106);
+                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
+                    }
+                    checkGrammarHeritageClause(heritageClause);
+                }
+            }
+            return false;
+        }
+        function checkGrammarComputedPropertyName(node) {
+            if (node.kind !== 140) {
+                return false;
+            }
+            var computedPropertyName = node;
+            if (computedPropertyName.expression.kind === 187 && computedPropertyName.expression.operatorToken.kind === 24) {
+                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
+            }
+        }
+        function checkGrammarForGenerator(node) {
+            if (node.asteriskToken) {
+                ts.Debug.assert(node.kind === 220 ||
+                    node.kind === 179 ||
+                    node.kind === 147);
+                if (ts.isInAmbientContext(node)) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
+                }
+                if (!node.body) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
+                }
+                if (languageVersion < 2) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
+                }
+            }
+        }
+        function checkGrammarForInvalidQuestionMark(node, questionToken, message) {
+            if (questionToken) {
+                return grammarErrorOnNode(questionToken, message);
+            }
+        }
+        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
+            var seen = {};
+            var Property = 1;
+            var GetAccessor = 2;
+            var SetAccessor = 4;
+            var GetOrSetAccessor = GetAccessor | SetAccessor;
+            var _loop_1 = function(prop) {
+                var name_21 = prop.name;
+                if (prop.kind === 193 ||
+                    name_21.kind === 140) {
+                    checkGrammarComputedPropertyName(name_21);
+                }
+                if (prop.kind === 254 && !inDestructuring && prop.objectAssignmentInitializer) {
+                    return { value: grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment) };
+                }
+                ts.forEach(prop.modifiers, function (mod) {
+                    if (mod.kind !== 118 || prop.kind !== 147) {
+                        grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
+                    }
+                });
+                var currentKind = void 0;
+                if (prop.kind === 253 || prop.kind === 254) {
+                    checkGrammarForInvalidQuestionMark(prop, prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
+                    if (name_21.kind === 8) {
+                        checkGrammarNumericLiteral(name_21);
+                    }
+                    currentKind = Property;
+                }
+                else if (prop.kind === 147) {
+                    currentKind = Property;
+                }
+                else if (prop.kind === 149) {
+                    currentKind = GetAccessor;
+                }
+                else if (prop.kind === 150) {
+                    currentKind = SetAccessor;
+                }
+                else {
+                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
+                }
+                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_21);
+                if (effectiveName === undefined) {
+                    return "continue";
+                }
+                if (!ts.hasProperty(seen, effectiveName)) {
+                    seen[effectiveName] = currentKind;
+                }
+                else {
+                    var existingKind = seen[effectiveName];
+                    if (currentKind === Property && existingKind === Property) {
+                        grammarErrorOnNode(name_21, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_21));
+                    }
+                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
+                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
+                            seen[effectiveName] = currentKind | existingKind;
+                        }
+                        else {
+                            return { value: grammarErrorOnNode(name_21, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
+                        }
+                    }
+                    else {
+                        return { value: grammarErrorOnNode(name_21, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name) };
+                    }
+                }
+            };
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var prop = _a[_i];
+                var state_2 = _loop_1(prop);
+                if (typeof state_2 === "object") return state_2.value;
+            }
+        }
+        function checkGrammarJsxElement(node) {
+            var seen = {};
+            for (var _i = 0, _a = node.attributes; _i < _a.length; _i++) {
+                var attr = _a[_i];
+                if (attr.kind === 247) {
+                    continue;
+                }
+                var jsxAttr = attr;
+                var name_22 = jsxAttr.name;
+                if (!ts.hasProperty(seen, name_22.text)) {
+                    seen[name_22.text] = true;
+                }
+                else {
+                    return grammarErrorOnNode(name_22, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
+                }
+                var initializer = jsxAttr.initializer;
+                if (initializer && initializer.kind === 248 && !initializer.expression) {
+                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
+                }
+            }
+        }
+        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
+            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
+                return true;
+            }
+            if (forInOrOfStatement.initializer.kind === 219) {
+                var variableList = forInOrOfStatement.initializer;
+                if (!checkGrammarVariableDeclarationList(variableList)) {
+                    var declarations = variableList.declarations;
+                    if (!declarations.length) {
+                        return false;
+                    }
+                    if (declarations.length > 1) {
+                        var diagnostic = forInOrOfStatement.kind === 207
+                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
+                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
+                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
+                    }
+                    var firstDeclaration = declarations[0];
+                    if (firstDeclaration.initializer) {
+                        var diagnostic = forInOrOfStatement.kind === 207
+                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
+                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
+                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
+                    }
+                    if (firstDeclaration.type) {
+                        var diagnostic = forInOrOfStatement.kind === 207
+                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
+                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
+                        return grammarErrorOnNode(firstDeclaration, diagnostic);
+                    }
+                }
+            }
+            return false;
+        }
+        function checkGrammarAccessor(accessor) {
+            var kind = accessor.kind;
+            if (languageVersion < 1) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
+            }
+            else if (ts.isInAmbientContext(accessor)) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
+            }
+            else if (accessor.body === undefined && !(accessor.flags & 128)) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+            }
+            else if (accessor.typeParameters) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
+            }
+            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
+                return grammarErrorOnNode(accessor.name, kind === 149 ?
+                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
+                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
+            }
+            else if (kind === 150) {
+                if (accessor.type) {
+                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
+                }
+                else {
+                    var parameter = accessor.parameters[0];
+                    if (parameter.dotDotDotToken) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
+                    }
+                    else if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
+                    }
+                    else if (parameter.initializer) {
+                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
+                    }
+                }
+            }
+        }
+        function doesAccessorHaveCorrectParameterCount(accessor) {
+            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 149 ? 0 : 1);
+        }
+        function getAccessorThisParameter(accessor) {
+            if (accessor.parameters.length === (accessor.kind === 149 ? 1 : 2) &&
+                accessor.parameters[0].name.kind === 69 &&
+                accessor.parameters[0].name.originalKeywordKind === 97) {
+                return accessor.parameters[0];
+            }
+        }
+        function getFunctionLikeThisParameter(func) {
+            if (func.parameters.length &&
+                func.parameters[0].name.kind === 69 &&
+                func.parameters[0].name.originalKeywordKind === 97) {
+                return func.parameters[0];
+            }
+        }
+        function checkGrammarForNonSymbolComputedProperty(node, message) {
+            if (ts.isDynamicName(node)) {
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarMethod(node) {
+            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
+                checkGrammarFunctionLikeDeclaration(node) ||
+                checkGrammarForGenerator(node)) {
+                return true;
+            }
+            if (node.parent.kind === 171) {
+                if (checkGrammarForInvalidQuestionMark(node, node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
+                    return true;
+                }
+                else if (node.body === undefined) {
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+                }
+            }
+            if (ts.isClassLike(node.parent)) {
+                if (ts.isInAmbientContext(node)) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
+                }
+                else if (!node.body) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
+                }
+            }
+            else if (node.parent.kind === 222) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
+            }
+            else if (node.parent.kind === 159) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
+            }
+        }
+        function checkGrammarBreakOrContinueStatement(node) {
+            var current = node;
+            while (current) {
+                if (ts.isFunctionLike(current)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
+                }
+                switch (current.kind) {
+                    case 214:
+                        if (node.label && current.label.text === node.label.text) {
+                            var isMisplacedContinueLabel = node.kind === 209
+                                && !ts.isIterationStatement(current.statement, true);
+                            if (isMisplacedContinueLabel) {
+                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
+                            }
+                            return false;
+                        }
+                        break;
+                    case 213:
+                        if (node.kind === 210 && !node.label) {
+                            return false;
+                        }
+                        break;
+                    default:
+                        if (ts.isIterationStatement(current, false) && !node.label) {
+                            return false;
+                        }
+                        break;
+                }
+                current = current.parent;
+            }
+            if (node.label) {
+                var message = node.kind === 210
+                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+            else {
+                var message = node.kind === 210
+                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarBindingElement(node) {
+            if (node.dotDotDotToken) {
+                var elements = node.parent.elements;
+                if (node !== ts.lastOrUndefined(elements)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                }
+                if (node.name.kind === 168 || node.name.kind === 167) {
+                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                }
+                if (node.initializer) {
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                }
+            }
+        }
+        function checkGrammarVariableDeclaration(node) {
+            if (node.parent.parent.kind !== 207 && node.parent.parent.kind !== 208) {
+                if (ts.isInAmbientContext(node)) {
+                    if (node.initializer) {
+                        var equalsTokenLength = "=".length;
+                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+                    }
+                }
+                else if (!node.initializer) {
+                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
+                    }
+                    if (ts.isConst(node)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
+                    }
+                }
+            }
+            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
+            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
+        }
+        function checkGrammarNameInLetOrConstDeclarations(name) {
+            if (name.kind === 69) {
+                if (name.originalKeywordKind === 108) {
+                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
+                }
+            }
+            else {
+                var elements = name.elements;
+                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
+                    var element = elements_2[_i];
+                    if (element.kind !== 193) {
+                        checkGrammarNameInLetOrConstDeclarations(element.name);
+                    }
+                }
+            }
+        }
+        function checkGrammarVariableDeclarationList(declarationList) {
+            var declarations = declarationList.declarations;
+            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
+                return true;
+            }
+            if (!declarationList.declarations.length) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
+            }
+        }
+        function allowLetAndConstDeclarations(parent) {
+            switch (parent.kind) {
+                case 203:
+                case 204:
+                case 205:
+                case 212:
+                case 206:
+                case 207:
+                case 208:
+                    return false;
+                case 214:
+                    return allowLetAndConstDeclarations(parent.parent);
+            }
+            return true;
+        }
+        function checkGrammarForDisallowedLetOrConstStatement(node) {
+            if (!allowLetAndConstDeclarations(node.parent)) {
+                if (ts.isLet(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
+                }
+                else if (ts.isConst(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
+                }
+            }
+        }
+        function hasParseDiagnostics(sourceFile) {
+            return sourceFile.parseDiagnostics.length > 0;
+        }
+        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function checkGrammarConstructorTypeParameters(node) {
+            if (node.typeParameters) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarConstructorTypeAnnotation(node) {
+            if (node.type) {
+                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarProperty(node) {
+            if (ts.isClassLike(node.parent)) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+            }
+            else if (node.parent.kind === 222) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
+                }
+            }
+            else if (node.parent.kind === 159) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
+                }
+            }
+            if (ts.isInAmbientContext(node) && node.initializer) {
+                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+            }
+        }
+        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
+            if (node.kind === 222 ||
+                node.kind === 223 ||
+                node.kind === 230 ||
+                node.kind === 229 ||
+                node.kind === 236 ||
+                node.kind === 235 ||
+                (node.flags & 2) ||
+                (node.flags & (1 | 512))) {
+                return false;
+            }
+            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
+        }
+        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (ts.isDeclaration(decl) || decl.kind === 200) {
+                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
+                        return true;
+                    }
+                }
+            }
+        }
+        function checkGrammarSourceFile(node) {
+            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
+        }
+        function checkGrammarStatementInAmbientContext(node) {
+            if (ts.isInAmbientContext(node)) {
+                if (isAccessor(node.parent.kind)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
+                }
+                var links = getNodeLinks(node);
+                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
+                }
+                if (node.parent.kind === 199 || node.parent.kind === 226 || node.parent.kind === 256) {
+                    var links_1 = getNodeLinks(node.parent);
+                    if (!links_1.hasReportedStatementInAmbientContext) {
+                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
+                    }
+                }
+                else {
+                }
+            }
+        }
+        function checkGrammarNumericLiteral(node) {
+            if (node.isOctalLiteral && languageVersion >= 1) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
+            }
+        }
+        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span), 0, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        var _a;
+    }
+    ts.createTypeChecker = createTypeChecker;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var nullSourceMapWriter;
+    var defaultLastEncodedSourceMapSpan = {
+        emittedLine: 1,
+        emittedColumn: 1,
+        sourceLine: 1,
+        sourceColumn: 1,
+        sourceIndex: 0
+    };
+    function getNullSourceMapWriter() {
+        if (nullSourceMapWriter === undefined) {
+            nullSourceMapWriter = {
+                getSourceMapData: function () { return undefined; },
+                setSourceFile: function (sourceFile) { },
+                emitStart: function (range) { },
+                emitEnd: function (range, stopOverridingSpan) { },
+                emitPos: function (pos) { },
+                changeEmitSourcePos: function () { },
+                getText: function () { return undefined; },
+                getSourceMappingURL: function () { return undefined; },
+                initialize: function (filePath, sourceMapFilePath, sourceFiles, isBundledEmit) { },
+                reset: function () { }
+            };
+        }
+        return nullSourceMapWriter;
+    }
+    ts.getNullSourceMapWriter = getNullSourceMapWriter;
+    function createSourceMapWriter(host, writer) {
+        var compilerOptions = host.getCompilerOptions();
+        var currentSourceFile;
+        var sourceMapDir;
+        var stopOverridingSpan = false;
+        var modifyLastSourcePos = false;
+        var sourceMapSourceIndex;
+        var lastRecordedSourceMapSpan;
+        var lastEncodedSourceMapSpan;
+        var lastEncodedNameIndex;
+        var sourceMapData;
+        return {
+            getSourceMapData: function () { return sourceMapData; },
+            setSourceFile: setSourceFile,
+            emitPos: emitPos,
+            emitStart: emitStart,
+            emitEnd: emitEnd,
+            changeEmitSourcePos: changeEmitSourcePos,
+            getText: getText,
+            getSourceMappingURL: getSourceMappingURL,
+            initialize: initialize,
+            reset: reset
+        };
+        function initialize(filePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
+            if (sourceMapData) {
+                reset();
+            }
+            currentSourceFile = undefined;
+            sourceMapSourceIndex = -1;
+            lastRecordedSourceMapSpan = undefined;
+            lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
+            lastEncodedNameIndex = 0;
+            sourceMapData = {
+                sourceMapFilePath: sourceMapFilePath,
+                jsSourceMappingURL: !compilerOptions.inlineSourceMap ? ts.getBaseFileName(ts.normalizeSlashes(sourceMapFilePath)) : undefined,
+                sourceMapFile: ts.getBaseFileName(ts.normalizeSlashes(filePath)),
+                sourceMapSourceRoot: compilerOptions.sourceRoot || "",
+                sourceMapSources: [],
+                inputSourceFileNames: [],
+                sourceMapNames: [],
+                sourceMapMappings: "",
+                sourceMapSourcesContent: compilerOptions.inlineSources ? [] : undefined,
+                sourceMapDecodedMappings: []
+            };
+            sourceMapData.sourceMapSourceRoot = ts.normalizeSlashes(sourceMapData.sourceMapSourceRoot);
+            if (sourceMapData.sourceMapSourceRoot.length && sourceMapData.sourceMapSourceRoot.charCodeAt(sourceMapData.sourceMapSourceRoot.length - 1) !== 47) {
+                sourceMapData.sourceMapSourceRoot += ts.directorySeparator;
+            }
+            if (compilerOptions.mapRoot) {
+                sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
+                if (!isBundledEmit) {
+                    ts.Debug.assert(sourceFiles.length === 1);
+                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFiles[0], host, sourceMapDir));
+                }
+                if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
+                    sourceMapDir = ts.combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
+                    sourceMapData.jsSourceMappingURL = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizePath(filePath)), ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), host.getCurrentDirectory(), host.getCanonicalFileName, true);
+                }
+                else {
+                    sourceMapData.jsSourceMappingURL = ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL);
+                }
+            }
+            else {
+                sourceMapDir = ts.getDirectoryPath(ts.normalizePath(filePath));
+            }
+        }
+        function reset() {
+            currentSourceFile = undefined;
+            sourceMapDir = undefined;
+            sourceMapSourceIndex = undefined;
+            lastRecordedSourceMapSpan = undefined;
+            lastEncodedSourceMapSpan = undefined;
+            lastEncodedNameIndex = undefined;
+            sourceMapData = undefined;
+        }
+        function updateLastEncodedAndRecordedSpans() {
+            if (modifyLastSourcePos) {
+                modifyLastSourcePos = false;
+                lastRecordedSourceMapSpan.emittedLine = lastEncodedSourceMapSpan.emittedLine;
+                lastRecordedSourceMapSpan.emittedColumn = lastEncodedSourceMapSpan.emittedColumn;
+                sourceMapData.sourceMapDecodedMappings.pop();
+                lastEncodedSourceMapSpan = sourceMapData.sourceMapDecodedMappings.length ?
+                    sourceMapData.sourceMapDecodedMappings[sourceMapData.sourceMapDecodedMappings.length - 1] :
+                    defaultLastEncodedSourceMapSpan;
+                var sourceMapMappings = sourceMapData.sourceMapMappings;
+                var lenthToSet = sourceMapMappings.length - 1;
+                for (; lenthToSet >= 0; lenthToSet--) {
+                    var currentChar = sourceMapMappings.charAt(lenthToSet);
+                    if (currentChar === ",") {
+                        break;
+                    }
+                    if (currentChar === ";" && lenthToSet !== 0 && sourceMapMappings.charAt(lenthToSet - 1) !== ";") {
+                        break;
+                    }
+                }
+                sourceMapData.sourceMapMappings = sourceMapMappings.substr(0, Math.max(0, lenthToSet));
+            }
+        }
+        function encodeLastRecordedSourceMapSpan() {
+            if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) {
+                return;
+            }
+            var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn;
+            if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) {
+                if (sourceMapData.sourceMapMappings) {
+                    sourceMapData.sourceMapMappings += ",";
+                }
+            }
+            else {
+                for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) {
+                    sourceMapData.sourceMapMappings += ";";
+                }
+                prevEncodedEmittedColumn = 1;
+            }
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn);
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex);
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine);
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn);
+            if (lastRecordedSourceMapSpan.nameIndex >= 0) {
+                ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this");
+                sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex);
+                lastEncodedNameIndex = lastRecordedSourceMapSpan.nameIndex;
+            }
+            lastEncodedSourceMapSpan = lastRecordedSourceMapSpan;
+            sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan);
+        }
+        function emitPos(pos) {
+            if (pos === -1) {
+                return;
+            }
+            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSourceFile, pos);
+            sourceLinePos.line++;
+            sourceLinePos.character++;
+            var emittedLine = writer.getLine();
+            var emittedColumn = writer.getColumn();
+            if (!lastRecordedSourceMapSpan ||
+                lastRecordedSourceMapSpan.emittedLine !== emittedLine ||
+                lastRecordedSourceMapSpan.emittedColumn !== emittedColumn ||
+                (lastRecordedSourceMapSpan.sourceIndex === sourceMapSourceIndex &&
+                    (lastRecordedSourceMapSpan.sourceLine > sourceLinePos.line ||
+                        (lastRecordedSourceMapSpan.sourceLine === sourceLinePos.line && lastRecordedSourceMapSpan.sourceColumn > sourceLinePos.character)))) {
+                encodeLastRecordedSourceMapSpan();
+                lastRecordedSourceMapSpan = {
+                    emittedLine: emittedLine,
+                    emittedColumn: emittedColumn,
+                    sourceLine: sourceLinePos.line,
+                    sourceColumn: sourceLinePos.character,
+                    sourceIndex: sourceMapSourceIndex
+                };
+                stopOverridingSpan = false;
+            }
+            else if (!stopOverridingSpan) {
+                lastRecordedSourceMapSpan.sourceLine = sourceLinePos.line;
+                lastRecordedSourceMapSpan.sourceColumn = sourceLinePos.character;
+                lastRecordedSourceMapSpan.sourceIndex = sourceMapSourceIndex;
+            }
+            updateLastEncodedAndRecordedSpans();
+        }
+        function getStartPos(range) {
+            var rangeHasDecorators = !!range.decorators;
+            return range.pos !== -1 ? ts.skipTrivia(currentSourceFile.text, rangeHasDecorators ? range.decorators.end : range.pos) : -1;
+        }
+        function emitStart(range) {
+            emitPos(getStartPos(range));
+        }
+        function emitEnd(range, stopOverridingEnd) {
+            emitPos(range.end);
+            stopOverridingSpan = stopOverridingEnd;
+        }
+        function changeEmitSourcePos() {
+            ts.Debug.assert(!modifyLastSourcePos);
+            modifyLastSourcePos = true;
+        }
+        function setSourceFile(sourceFile) {
+            currentSourceFile = sourceFile;
+            var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
+            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSourceFile.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, true);
+            sourceMapSourceIndex = ts.indexOf(sourceMapData.sourceMapSources, source);
+            if (sourceMapSourceIndex === -1) {
+                sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
+                sourceMapData.sourceMapSources.push(source);
+                sourceMapData.inputSourceFileNames.push(sourceFile.fileName);
+                if (compilerOptions.inlineSources) {
+                    sourceMapData.sourceMapSourcesContent.push(sourceFile.text);
+                }
+            }
+        }
+        function getText() {
+            encodeLastRecordedSourceMapSpan();
+            return ts.stringify({
+                version: 3,
+                file: sourceMapData.sourceMapFile,
+                sourceRoot: sourceMapData.sourceMapSourceRoot,
+                sources: sourceMapData.sourceMapSources,
+                names: sourceMapData.sourceMapNames,
+                mappings: sourceMapData.sourceMapMappings,
+                sourcesContent: sourceMapData.sourceMapSourcesContent
+            });
+        }
+        function getSourceMappingURL() {
+            if (compilerOptions.inlineSourceMap) {
+                var base64SourceMapText = ts.convertToBase64(getText());
+                return sourceMapData.jsSourceMappingURL = "data:application/json;base64," + base64SourceMapText;
+            }
+            else {
+                return sourceMapData.jsSourceMappingURL;
+            }
+        }
+    }
+    ts.createSourceMapWriter = createSourceMapWriter;
+    var base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    function base64FormatEncode(inValue) {
+        if (inValue < 64) {
+            return base64Chars.charAt(inValue);
+        }
+        throw TypeError(inValue + ": not a 64 based value");
+    }
+    function base64VLQFormatEncode(inValue) {
+        if (inValue < 0) {
+            inValue = ((-inValue) << 1) + 1;
+        }
+        else {
+            inValue = inValue << 1;
+        }
+        var encodedStr = "";
+        do {
+            var currentDigit = inValue & 31;
+            inValue = inValue >> 5;
+            if (inValue > 0) {
+                currentDigit = currentDigit | 32;
+            }
+            encodedStr = encodedStr + base64FormatEncode(currentDigit);
+        } while (inValue > 0);
+        return encodedStr;
+    }
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
+        var declarationDiagnostics = ts.createDiagnosticCollection();
+        ts.forEachExpectedEmitFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
+        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
+        function getDeclarationDiagnosticsFromFile(_a, sources, isBundledEmit) {
+            var declarationFilePath = _a.declarationFilePath;
+            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sources, isBundledEmit);
+        }
+    }
+    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
+    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit) {
+        var newLine = host.getNewLine();
+        var compilerOptions = host.getCompilerOptions();
+        var write;
+        var writeLine;
+        var increaseIndent;
+        var decreaseIndent;
+        var writeTextOfNode;
+        var writer;
+        createAndSetNewTextWriterWithSymbolWriter();
+        var enclosingDeclaration;
+        var resultHasExternalModuleIndicator;
+        var currentText;
+        var currentLineMap;
+        var currentIdentifiers;
+        var isCurrentFileExternalModule;
+        var reportedDeclarationError = false;
+        var errorNameNode;
+        var emitJsDocComments = compilerOptions.removeComments ? function (declaration) { } : writeJsDocComments;
+        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
+        var noDeclare;
+        var moduleElementDeclarationEmitInfo = [];
+        var asynchronousSubModuleDeclarationEmitInfo;
+        var referencesOutput = "";
+        var usedTypeDirectiveReferences;
+        var emittedReferencedFiles = [];
+        var addedGlobalFileReference = false;
+        var allSourcesModuleElementDeclarationEmitInfo = [];
+        ts.forEach(sourceFiles, function (sourceFile) {
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                return;
+            }
+            if (!compilerOptions.noResolve) {
+                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
+                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
+                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
+                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference)) {
+                            addedGlobalFileReference = true;
+                        }
+                        emittedReferencedFiles.push(referencedFile);
+                    }
+                });
+            }
+            resultHasExternalModuleIndicator = false;
+            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
+                noDeclare = false;
+                emitSourceFile(sourceFile);
+            }
+            else if (ts.isExternalModule(sourceFile)) {
+                noDeclare = true;
+                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
+                writeLine();
+                increaseIndent();
+                emitSourceFile(sourceFile);
+                decreaseIndent();
+                write("}");
+                writeLine();
+            }
+            if (moduleElementDeclarationEmitInfo.length) {
+                var oldWriter = writer;
+                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
+                        ts.Debug.assert(aliasEmitInfo.node.kind === 230);
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            increaseIndent();
+                        }
+                        writeImportDeclaration(aliasEmitInfo.node);
+                        aliasEmitInfo.asynchronousOutput = writer.getText();
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            decreaseIndent();
+                        }
+                    }
+                });
+                setWriter(oldWriter);
+                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
+                moduleElementDeclarationEmitInfo = [];
+            }
+            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
+                write("export {};");
+                writeLine();
+            }
+        });
+        if (usedTypeDirectiveReferences) {
+            for (var directive in usedTypeDirectiveReferences) {
+                if (ts.hasProperty(usedTypeDirectiveReferences, directive)) {
+                    referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
+                }
+            }
+        }
+        return {
+            reportedDeclarationError: reportedDeclarationError,
+            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
+            synchronousDeclarationOutput: writer.getText(),
+            referencesOutput: referencesOutput
+        };
+        function hasInternalAnnotation(range) {
+            var comment = currentText.substring(range.pos, range.end);
+            return comment.indexOf("@internal") >= 0;
+        }
+        function stripInternal(node) {
+            if (node) {
+                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
+                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
+                    return;
+                }
+                emitNode(node);
+            }
+        }
+        function createAndSetNewTextWriterWithSymbolWriter() {
+            var writer = ts.createTextWriter(newLine);
+            writer.trackSymbol = trackSymbol;
+            writer.reportInaccessibleThisError = reportInaccessibleThisError;
+            writer.writeKeyword = writer.write;
+            writer.writeOperator = writer.write;
+            writer.writePunctuation = writer.write;
+            writer.writeSpace = writer.write;
+            writer.writeStringLiteral = writer.writeLiteral;
+            writer.writeParameter = writer.write;
+            writer.writeSymbol = writer.write;
+            setWriter(writer);
+        }
+        function setWriter(newWriter) {
+            writer = newWriter;
+            write = newWriter.write;
+            writeTextOfNode = newWriter.writeTextOfNode;
+            writeLine = newWriter.writeLine;
+            increaseIndent = newWriter.increaseIndent;
+            decreaseIndent = newWriter.decreaseIndent;
+        }
+        function writeAsynchronousModuleElements(nodes) {
+            var oldWriter = writer;
+            ts.forEach(nodes, function (declaration) {
+                var nodeToCheck;
+                if (declaration.kind === 218) {
+                    nodeToCheck = declaration.parent.parent;
+                }
+                else if (declaration.kind === 233 || declaration.kind === 234 || declaration.kind === 231) {
+                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
+                }
+                else {
+                    nodeToCheck = declaration;
+                }
+                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
+                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
+                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
+                }
+                if (moduleElementEmitInfo) {
+                    if (moduleElementEmitInfo.node.kind === 230) {
+                        moduleElementEmitInfo.isVisible = true;
+                    }
+                    else {
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
+                            increaseIndent();
+                        }
+                        if (nodeToCheck.kind === 225) {
+                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
+                            asynchronousSubModuleDeclarationEmitInfo = [];
+                        }
+                        writeModuleElement(nodeToCheck);
+                        if (nodeToCheck.kind === 225) {
+                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
+                            asynchronousSubModuleDeclarationEmitInfo = undefined;
+                        }
+                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
+                    }
+                }
+            });
+            setWriter(oldWriter);
+        }
+        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
+            if (!typeReferenceDirectives) {
+                return;
+            }
+            if (!usedTypeDirectiveReferences) {
+                usedTypeDirectiveReferences = {};
+            }
+            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
+                var directive = typeReferenceDirectives_1[_i];
+                if (!ts.hasProperty(usedTypeDirectiveReferences, directive)) {
+                    usedTypeDirectiveReferences[directive] = directive;
+                }
+            }
+        }
+        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
+            if (symbolAccessibilityResult.accessibility === 0) {
+                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
+                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
+                }
+            }
+            else {
+                reportedDeclarationError = true;
+                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
+                if (errorInfo) {
+                    if (errorInfo.typeName) {
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
+                    }
+                    else {
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
+                    }
+                }
+            }
+        }
+        function trackSymbol(symbol, enclosingDeclaration, meaning) {
+            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning));
+            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
+        }
+        function reportInaccessibleThisError() {
+            if (errorNameNode) {
+                reportedDeclarationError = true;
+                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
+            }
+        }
+        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            if (type) {
+                emitType(type);
+            }
+            else {
+                errorNameNode = declaration.name;
+                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, 2, writer);
+                errorNameNode = undefined;
+            }
+        }
+        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            if (signature.type) {
+                emitType(signature.type);
+            }
+            else {
+                errorNameNode = signature.name;
+                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 2, writer);
+                errorNameNode = undefined;
+            }
+        }
+        function emitLines(nodes) {
+            for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
+                var node = nodes_2[_i];
+                emit(node);
+            }
+        }
+        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
+            var currentWriterPos = writer.getTextPos();
+            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
+                var node = nodes_3[_i];
+                if (!canEmitFn || canEmitFn(node)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        write(separator);
+                    }
+                    currentWriterPos = writer.getTextPos();
+                    eachNodeEmitFn(node);
+                }
+            }
+        }
+        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
+            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
+        }
+        function writeJsDocComments(declaration) {
+            if (declaration) {
+                var jsDocComments = ts.getJsDocCommentsFromText(declaration, currentText);
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
+                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, true, newLine, ts.writeCommentRange);
+            }
+        }
+        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            emitType(type);
+        }
+        function emitType(type) {
+            switch (type.kind) {
+                case 117:
+                case 132:
+                case 130:
+                case 120:
+                case 133:
+                case 103:
+                case 135:
+                case 93:
+                case 127:
+                case 165:
+                case 166:
+                    return writeTextOfNode(currentText, type);
+                case 194:
+                    return emitExpressionWithTypeArguments(type);
+                case 155:
+                    return emitTypeReference(type);
+                case 158:
+                    return emitTypeQuery(type);
+                case 160:
+                    return emitArrayType(type);
+                case 161:
+                    return emitTupleType(type);
+                case 162:
+                    return emitUnionType(type);
+                case 163:
+                    return emitIntersectionType(type);
+                case 164:
+                    return emitParenType(type);
+                case 156:
+                case 157:
+                    return emitSignatureDeclarationWithJsDocComments(type);
+                case 159:
+                    return emitTypeLiteral(type);
+                case 69:
+                    return emitEntityName(type);
+                case 139:
+                    return emitEntityName(type);
+                case 154:
+                    return emitTypePredicate(type);
+            }
+            function writeEntityName(entityName) {
+                if (entityName.kind === 69) {
+                    writeTextOfNode(currentText, entityName);
+                }
+                else {
+                    var left = entityName.kind === 139 ? entityName.left : entityName.expression;
+                    var right = entityName.kind === 139 ? entityName.right : entityName.name;
+                    writeEntityName(left);
+                    write(".");
+                    writeTextOfNode(currentText, right);
+                }
+            }
+            function emitEntityName(entityName) {
+                var visibilityResult = resolver.isEntityNameVisible(entityName, entityName.parent.kind === 229 ? entityName.parent : enclosingDeclaration);
+                handleSymbolAccessibilityError(visibilityResult);
+                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
+                writeEntityName(entityName);
+            }
+            function emitExpressionWithTypeArguments(node) {
+                if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                    ts.Debug.assert(node.expression.kind === 69 || node.expression.kind === 172);
+                    emitEntityName(node.expression);
+                    if (node.typeArguments) {
+                        write("<");
+                        emitCommaList(node.typeArguments, emitType);
+                        write(">");
+                    }
+                }
+            }
+            function emitTypeReference(type) {
+                emitEntityName(type.typeName);
+                if (type.typeArguments) {
+                    write("<");
+                    emitCommaList(type.typeArguments, emitType);
+                    write(">");
+                }
+            }
+            function emitTypePredicate(type) {
+                writeTextOfNode(currentText, type.parameterName);
+                write(" is ");
+                emitType(type.type);
+            }
+            function emitTypeQuery(type) {
+                write("typeof ");
+                emitEntityName(type.exprName);
+            }
+            function emitArrayType(type) {
+                emitType(type.elementType);
+                write("[]");
+            }
+            function emitTupleType(type) {
+                write("[");
+                emitCommaList(type.elementTypes, emitType);
+                write("]");
+            }
+            function emitUnionType(type) {
+                emitSeparatedList(type.types, " | ", emitType);
+            }
+            function emitIntersectionType(type) {
+                emitSeparatedList(type.types, " & ", emitType);
+            }
+            function emitParenType(type) {
+                write("(");
+                emitType(type.type);
+                write(")");
+            }
+            function emitTypeLiteral(type) {
+                write("{");
+                if (type.members.length) {
+                    writeLine();
+                    increaseIndent();
+                    emitLines(type.members);
+                    decreaseIndent();
+                }
+                write("}");
+            }
+        }
+        function emitSourceFile(node) {
+            currentText = node.text;
+            currentLineMap = ts.getLineStarts(node);
+            currentIdentifiers = node.identifiers;
+            isCurrentFileExternalModule = ts.isExternalModule(node);
+            enclosingDeclaration = node;
+            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, true);
+            emitLines(node.statements);
+        }
+        function getExportDefaultTempVariableName() {
+            var baseName = "_default";
+            if (!ts.hasProperty(currentIdentifiers, baseName)) {
+                return baseName;
+            }
+            var count = 0;
+            while (true) {
+                count++;
+                var name_23 = baseName + "_" + count;
+                if (!ts.hasProperty(currentIdentifiers, name_23)) {
+                    return name_23;
+                }
+            }
+        }
+        function emitExportAssignment(node) {
+            if (node.expression.kind === 69) {
+                write(node.isExportEquals ? "export = " : "export default ");
+                writeTextOfNode(currentText, node.expression);
+            }
+            else {
+                var tempVarName = getExportDefaultTempVariableName();
+                if (!noDeclare) {
+                    write("declare ");
+                }
+                write("var ");
+                write(tempVarName);
+                write(": ");
+                writer.getSymbolAccessibilityDiagnostic = getDefaultExportAccessibilityDiagnostic;
+                resolver.writeTypeOfExpression(node.expression, enclosingDeclaration, 2, writer);
+                write(";");
+                writeLine();
+                write(node.isExportEquals ? "export = " : "export default ");
+                write(tempVarName);
+            }
+            write(";");
+            writeLine();
+            if (node.expression.kind === 69) {
+                var nodes = resolver.collectLinkedAliases(node.expression);
+                writeAsynchronousModuleElements(nodes);
+            }
+            function getDefaultExportAccessibilityDiagnostic(diagnostic) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
+                    errorNode: node
+                };
+            }
+        }
+        function isModuleElementVisible(node) {
+            return resolver.isDeclarationVisible(node);
+        }
+        function emitModuleElement(node, isModuleElementVisible) {
+            if (isModuleElementVisible) {
+                writeModuleElement(node);
+            }
+            else if (node.kind === 229 ||
+                (node.parent.kind === 256 && isCurrentFileExternalModule)) {
+                var isVisible = void 0;
+                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 256) {
+                    asynchronousSubModuleDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
+                else {
+                    if (node.kind === 230) {
+                        var importDeclaration = node;
+                        if (importDeclaration.importClause) {
+                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
+                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
+                        }
+                    }
+                    moduleElementDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
+            }
+        }
+        function writeModuleElement(node) {
+            switch (node.kind) {
+                case 220:
+                    return writeFunctionDeclaration(node);
+                case 200:
+                    return writeVariableStatement(node);
+                case 222:
+                    return writeInterfaceDeclaration(node);
+                case 221:
+                    return writeClassDeclaration(node);
+                case 223:
+                    return writeTypeAliasDeclaration(node);
+                case 224:
+                    return writeEnumDeclaration(node);
+                case 225:
+                    return writeModuleDeclaration(node);
+                case 229:
+                    return writeImportEqualsDeclaration(node);
+                case 230:
+                    return writeImportDeclaration(node);
+                default:
+                    ts.Debug.fail("Unknown symbol kind");
+            }
+        }
+        function emitModuleElementDeclarationFlags(node) {
+            if (node.parent.kind === 256) {
+                if (node.flags & 1) {
+                    write("export ");
+                }
+                if (node.flags & 512) {
+                    write("default ");
+                }
+                else if (node.kind !== 222 && !noDeclare) {
+                    write("declare ");
+                }
+            }
+        }
+        function emitClassMemberDeclarationFlags(flags) {
+            if (flags & 8) {
+                write("private ");
+            }
+            else if (flags & 16) {
+                write("protected ");
+            }
+            if (flags & 32) {
+                write("static ");
+            }
+            if (flags & 64) {
+                write("readonly ");
+            }
+            if (flags & 128) {
+                write("abstract ");
+            }
+        }
+        function writeImportEqualsDeclaration(node) {
+            emitJsDocComments(node);
+            if (node.flags & 1) {
+                write("export ");
+            }
+            write("import ");
+            writeTextOfNode(currentText, node.name);
+            write(" = ");
+            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
+                write(";");
+            }
+            else {
+                write("require(");
+                emitExternalModuleSpecifier(node);
+                write(");");
+            }
+            writer.writeLine();
+            function getImportEntityNameVisibilityError(symbolAccessibilityResult) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
+                    errorNode: node,
+                    typeName: node.name
+                };
+            }
+        }
+        function isVisibleNamedBinding(namedBindings) {
+            if (namedBindings) {
+                if (namedBindings.kind === 232) {
+                    return resolver.isDeclarationVisible(namedBindings);
+                }
+                else {
+                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
+                }
+            }
+        }
+        function writeImportDeclaration(node) {
+            emitJsDocComments(node);
+            if (node.flags & 1) {
+                write("export ");
+            }
+            write("import ");
+            if (node.importClause) {
+                var currentWriterPos = writer.getTextPos();
+                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
+                    writeTextOfNode(currentText, node.importClause.name);
+                }
+                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        write(", ");
+                    }
+                    if (node.importClause.namedBindings.kind === 232) {
+                        write("* as ");
+                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
+                    }
+                    else {
+                        write("{ ");
+                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
+                        write(" }");
+                    }
+                }
+                write(" from ");
+            }
+            emitExternalModuleSpecifier(node);
+            write(";");
+            writer.writeLine();
+        }
+        function emitExternalModuleSpecifier(parent) {
+            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 225;
+            var moduleSpecifier;
+            if (parent.kind === 229) {
+                var node = parent;
+                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
+            }
+            else if (parent.kind === 225) {
+                moduleSpecifier = parent.name;
+            }
+            else {
+                var node = parent;
+                moduleSpecifier = node.moduleSpecifier;
+            }
+            if (moduleSpecifier.kind === 9 && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
+                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
+                if (moduleName) {
+                    write('"');
+                    write(moduleName);
+                    write('"');
+                    return;
+                }
+            }
+            writeTextOfNode(currentText, moduleSpecifier);
+        }
+        function emitImportOrExportSpecifier(node) {
+            if (node.propertyName) {
+                writeTextOfNode(currentText, node.propertyName);
+                write(" as ");
+            }
+            writeTextOfNode(currentText, node.name);
+        }
+        function emitExportSpecifier(node) {
+            emitImportOrExportSpecifier(node);
+            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
+            writeAsynchronousModuleElements(nodes);
+        }
+        function emitExportDeclaration(node) {
+            emitJsDocComments(node);
+            write("export ");
+            if (node.exportClause) {
+                write("{ ");
+                emitCommaList(node.exportClause.elements, emitExportSpecifier);
+                write(" }");
+            }
+            else {
+                write("*");
+            }
+            if (node.moduleSpecifier) {
+                write(" from ");
+                emitExternalModuleSpecifier(node);
+            }
+            write(";");
+            writer.writeLine();
+        }
+        function writeModuleDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isGlobalScopeAugmentation(node)) {
+                write("global ");
+            }
+            else {
+                if (node.flags & 4096) {
+                    write("namespace ");
+                }
+                else {
+                    write("module ");
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    emitExternalModuleSpecifier(node);
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
+                }
+            }
+            while (node.body.kind !== 226) {
+                node = node.body;
+                write(".");
+                writeTextOfNode(currentText, node.name);
+            }
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.body.statements);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function writeTypeAliasDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("type ");
+            writeTextOfNode(currentText, node.name);
+            emitTypeParameters(node.typeParameters);
+            write(" = ");
+            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
+            write(";");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+            function getTypeAliasDeclarationVisibilityError(symbolAccessibilityResult) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
+                    errorNode: node.type,
+                    typeName: node.name
+                };
+            }
+        }
+        function writeEnumDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isConst(node)) {
+                write("const ");
+            }
+            write("enum ");
+            writeTextOfNode(currentText, node.name);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+        }
+        function emitEnumMemberDeclaration(node) {
+            emitJsDocComments(node);
+            writeTextOfNode(currentText, node.name);
+            var enumMemberValue = resolver.getConstantValue(node);
+            if (enumMemberValue !== undefined) {
+                write(" = ");
+                write(enumMemberValue.toString());
+            }
+            write(",");
+            writeLine();
+        }
+        function isPrivateMethodTypeParameter(node) {
+            return node.parent.kind === 147 && (node.parent.flags & 8);
+        }
+        function emitTypeParameters(typeParameters) {
+            function emitTypeParameter(node) {
+                increaseIndent();
+                emitJsDocComments(node);
+                decreaseIndent();
+                writeTextOfNode(currentText, node.name);
+                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
+                    write(" extends ");
+                    if (node.parent.kind === 156 ||
+                        node.parent.kind === 157 ||
+                        (node.parent.parent && node.parent.parent.kind === 159)) {
+                        ts.Debug.assert(node.parent.kind === 147 ||
+                            node.parent.kind === 146 ||
+                            node.parent.kind === 156 ||
+                            node.parent.kind === 157 ||
+                            node.parent.kind === 151 ||
+                            node.parent.kind === 152);
+                        emitType(node.constraint);
+                    }
+                    else {
+                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
+                    }
+                }
+                function getTypeParameterConstraintVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage;
+                    switch (node.parent.kind) {
+                        case 221:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
+                            break;
+                        case 222:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 152:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 151:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 147:
+                        case 146:
+                            if (node.parent.flags & 32) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else if (node.parent.parent.kind === 221) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                            }
+                            break;
+                        case 220:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                            break;
+                        default:
+                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: node.name
+                    };
+                }
+            }
+            if (typeParameters) {
+                write("<");
+                emitCommaList(typeParameters, emitTypeParameter);
+                write(">");
+            }
+        }
+        function emitHeritageClause(typeReferences, isImplementsList) {
+            if (typeReferences) {
+                write(isImplementsList ? " implements " : " extends ");
+                emitCommaList(typeReferences, emitTypeOfTypeReference);
+            }
+            function emitTypeOfTypeReference(node) {
+                if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
+                }
+                else if (!isImplementsList && node.expression.kind === 93) {
+                    write("null");
+                }
+                else {
+                    writer.getSymbolAccessibilityDiagnostic = getHeritageClauseVisibilityError;
+                    resolver.writeBaseConstructorTypeOfClass(enclosingDeclaration, enclosingDeclaration, 2, writer);
+                }
+                function getHeritageClauseVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage;
+                    if (node.parent.parent.kind === 221) {
+                        diagnosticMessage = isImplementsList ?
+                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
+                            ts.Diagnostics.Extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        diagnosticMessage = ts.Diagnostics.Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: node.parent.parent.name
+                    };
+                }
+            }
+        }
+        function writeClassDeclaration(node) {
+            function emitParameterProperties(constructorDeclaration) {
+                if (constructorDeclaration) {
+                    ts.forEach(constructorDeclaration.parameters, function (param) {
+                        if (param.flags & 92) {
+                            emitPropertyDeclaration(param);
+                        }
+                    });
+                }
+            }
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (node.flags & 128) {
+                write("abstract ");
+            }
+            write("class ");
+            writeTextOfNode(currentText, node.name);
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitTypeParameters(node.typeParameters);
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            if (baseTypeNode) {
+                emitHeritageClause([baseTypeNode], false);
+            }
+            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), true);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitParameterProperties(ts.getFirstConstructorWithBody(node));
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function writeInterfaceDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("interface ");
+            writeTextOfNode(currentText, node.name);
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitTypeParameters(node.typeParameters);
+            emitHeritageClause(ts.getInterfaceBaseTypeNodes(node), false);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function emitPropertyDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            emitJsDocComments(node);
+            emitClassMemberDeclarationFlags(node.flags);
+            emitVariableDeclaration(node);
+            write(";");
+            writeLine();
+        }
+        function emitVariableDeclaration(node) {
+            if (node.kind !== 218 || resolver.isDeclarationVisible(node)) {
+                if (ts.isBindingPattern(node.name)) {
+                    emitBindingPattern(node.name);
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
+                    if ((node.kind === 145 || node.kind === 144 || node.kind === 142) && ts.hasQuestionToken(node)) {
+                        write("?");
+                    }
+                    if ((node.kind === 145 || node.kind === 144) && node.parent.kind === 159) {
+                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
+                    }
+                    else if (!(node.flags & 8)) {
+                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
+                    }
+                }
+            }
+            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                if (node.kind === 218) {
+                    return symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 ?
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
+                }
+                else if (node.kind === 145 || node.kind === 144) {
+                    if (node.flags & 32) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else if (node.parent.kind === 221) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
+                    }
+                }
+            }
+            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
+            }
+            function emitBindingPattern(bindingPattern) {
+                var elements = [];
+                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (element.kind !== 193) {
+                        elements.push(element);
+                    }
+                }
+                emitCommaList(elements, emitBindingElement);
+            }
+            function emitBindingElement(bindingElement) {
+                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                    return diagnosticMessage !== undefined ? {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: bindingElement,
+                        typeName: bindingElement.name
+                    } : undefined;
+                }
+                if (bindingElement.name) {
+                    if (ts.isBindingPattern(bindingElement.name)) {
+                        emitBindingPattern(bindingElement.name);
+                    }
+                    else {
+                        writeTextOfNode(currentText, bindingElement.name);
+                        writeTypeOfDeclaration(bindingElement, undefined, getBindingElementTypeVisibilityError);
+                    }
+                }
+            }
+        }
+        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
+            if (node.type) {
+                write(": ");
+                emitType(node.type);
+            }
+        }
+        function isVariableStatementVisible(node) {
+            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
+        }
+        function writeVariableStatement(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isLet(node.declarationList)) {
+                write("let ");
+            }
+            else if (ts.isConst(node.declarationList)) {
+                write("const ");
+            }
+            else {
+                write("var ");
+            }
+            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
+            write(";");
+            writeLine();
+        }
+        function emitAccessorDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+            var accessorWithTypeAnnotation;
+            if (node === accessors.firstAccessor) {
+                emitJsDocComments(accessors.getAccessor);
+                emitJsDocComments(accessors.setAccessor);
+                emitClassMemberDeclarationFlags(node.flags | (accessors.setAccessor ? 0 : 64));
+                writeTextOfNode(currentText, node.name);
+                if (!(node.flags & 8)) {
+                    accessorWithTypeAnnotation = node;
+                    var type = getTypeAnnotationFromAccessor(node);
+                    if (!type) {
+                        var anotherAccessor = node.kind === 149 ? accessors.setAccessor : accessors.getAccessor;
+                        type = getTypeAnnotationFromAccessor(anotherAccessor);
+                        if (type) {
+                            accessorWithTypeAnnotation = anotherAccessor;
+                        }
+                    }
+                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
+                }
+                write(";");
+                writeLine();
+            }
+            function getTypeAnnotationFromAccessor(accessor) {
+                if (accessor) {
+                    return accessor.kind === 149
+                        ? accessor.type
+                        : accessor.parameters.length > 0
+                            ? accessor.parameters[0].type
+                            : undefined;
+                }
+            }
+            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                if (accessorWithTypeAnnotation.kind === 150) {
+                    if (accessorWithTypeAnnotation.parent.flags & 32) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.parameters[0],
+                        typeName: accessorWithTypeAnnotation.name
+                    };
+                }
+                else {
+                    if (accessorWithTypeAnnotation.flags & 32) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.name,
+                        typeName: undefined
+                    };
+                }
+            }
+        }
+        function writeFunctionDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            if (!resolver.isImplementationOfOverload(node)) {
+                emitJsDocComments(node);
+                if (node.kind === 220) {
+                    emitModuleElementDeclarationFlags(node);
+                }
+                else if (node.kind === 147 || node.kind === 148) {
+                    emitClassMemberDeclarationFlags(node.flags);
+                }
+                if (node.kind === 220) {
+                    write("function ");
+                    writeTextOfNode(currentText, node.name);
+                }
+                else if (node.kind === 148) {
+                    write("constructor");
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
+                    if (ts.hasQuestionToken(node)) {
+                        write("?");
+                    }
+                }
+                emitSignatureDeclaration(node);
+            }
+        }
+        function emitSignatureDeclarationWithJsDocComments(node) {
+            emitJsDocComments(node);
+            emitSignatureDeclaration(node);
+        }
+        function emitSignatureDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            var closeParenthesizedFunctionType = false;
+            if (node.kind === 153) {
+                emitClassMemberDeclarationFlags(node.flags);
+                write("[");
+            }
+            else {
+                if (node.kind === 152 || node.kind === 157) {
+                    write("new ");
+                }
+                else if (node.kind === 156) {
+                    var currentOutput = writer.getText();
+                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
+                        closeParenthesizedFunctionType = true;
+                        write("(");
+                    }
+                }
+                emitTypeParameters(node.typeParameters);
+                write("(");
+            }
+            emitCommaList(node.parameters, emitParameterDeclaration);
+            if (node.kind === 153) {
+                write("]");
+            }
+            else {
+                write(")");
+            }
+            var isFunctionTypeOrConstructorType = node.kind === 156 || node.kind === 157;
+            if (isFunctionTypeOrConstructorType || node.parent.kind === 159) {
+                if (node.type) {
+                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
+                    emitType(node.type);
+                }
+            }
+            else if (node.kind !== 148 && !(node.flags & 8)) {
+                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
+            }
+            enclosingDeclaration = prevEnclosingDeclaration;
+            if (!isFunctionTypeOrConstructorType) {
+                write(";");
+                writeLine();
+            }
+            else if (closeParenthesizedFunctionType) {
+                write(")");
+            }
+            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                switch (node.kind) {
+                    case 152:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 151:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 153:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 147:
+                    case 146:
+                        if (node.flags & 32) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 ?
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else if (node.parent.kind === 221) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 ?
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
+                        }
+                        break;
+                    case 220:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
+                        break;
+                    default:
+                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
+                }
+                return {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node.name || node
+                };
+            }
+        }
+        function emitParameterDeclaration(node) {
+            increaseIndent();
+            emitJsDocComments(node);
+            if (node.dotDotDotToken) {
+                write("...");
+            }
+            if (ts.isBindingPattern(node.name)) {
+                emitBindingPattern(node.name);
+            }
+            else {
+                writeTextOfNode(currentText, node.name);
+            }
+            if (resolver.isOptionalParameter(node)) {
+                write("?");
+            }
+            decreaseIndent();
+            if (node.parent.kind === 156 ||
+                node.parent.kind === 157 ||
+                node.parent.parent.kind === 159) {
+                emitTypeOfVariableDeclarationFromTypeLiteral(node);
+            }
+            else if (!(node.parent.flags & 8)) {
+                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
+            }
+            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
+            }
+            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                switch (node.parent.kind) {
+                    case 148:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
+                    case 152:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 151:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 147:
+                    case 146:
+                        if (node.parent.flags & 32) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 ?
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else if (node.parent.parent.kind === 221) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 ?
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                        }
+                    case 220:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 ?
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                    default:
+                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
+                }
+            }
+            function emitBindingPattern(bindingPattern) {
+                if (bindingPattern.kind === 167) {
+                    write("{");
+                    emitCommaList(bindingPattern.elements, emitBindingElement);
+                    write("}");
+                }
+                else if (bindingPattern.kind === 168) {
+                    write("[");
+                    var elements = bindingPattern.elements;
+                    emitCommaList(elements, emitBindingElement);
+                    if (elements && elements.hasTrailingComma) {
+                        write(", ");
+                    }
+                    write("]");
+                }
+            }
+            function emitBindingElement(bindingElement) {
+                if (bindingElement.kind === 193) {
+                    write(" ");
+                }
+                else if (bindingElement.kind === 169) {
+                    if (bindingElement.propertyName) {
+                        writeTextOfNode(currentText, bindingElement.propertyName);
+                        write(": ");
+                    }
+                    if (bindingElement.name) {
+                        if (ts.isBindingPattern(bindingElement.name)) {
+                            emitBindingPattern(bindingElement.name);
+                        }
+                        else {
+                            ts.Debug.assert(bindingElement.name.kind === 69);
+                            if (bindingElement.dotDotDotToken) {
+                                write("...");
+                            }
+                            writeTextOfNode(currentText, bindingElement.name);
+                        }
+                    }
+                }
+            }
+        }
+        function emitNode(node) {
+            switch (node.kind) {
+                case 220:
+                case 225:
+                case 229:
+                case 222:
+                case 221:
+                case 223:
+                case 224:
+                    return emitModuleElement(node, isModuleElementVisible(node));
+                case 200:
+                    return emitModuleElement(node, isVariableStatementVisible(node));
+                case 230:
+                    return emitModuleElement(node, !node.importClause);
+                case 236:
+                    return emitExportDeclaration(node);
+                case 148:
+                case 147:
+                case 146:
+                    return writeFunctionDeclaration(node);
+                case 152:
+                case 151:
+                case 153:
+                    return emitSignatureDeclarationWithJsDocComments(node);
+                case 149:
+                case 150:
+                    return emitAccessorDeclaration(node);
+                case 145:
+                case 144:
+                    return emitPropertyDeclaration(node);
+                case 255:
+                    return emitEnumMemberDeclaration(node);
+                case 235:
+                    return emitExportAssignment(node);
+                case 256:
+                    return emitSourceFile(node);
+            }
+        }
+        function writeReferencePath(referencedFile, addBundledFileReference) {
+            var declFileName;
+            var addedBundledEmitReference = false;
+            if (ts.isDeclarationFile(referencedFile)) {
+                declFileName = referencedFile.fileName;
+            }
+            else {
+                ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile);
+            }
+            if (declFileName) {
+                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, false);
+                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
+            }
+            return addedBundledEmitReference;
+            function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) {
+                if (isBundledEmit && !addBundledFileReference) {
+                    return;
+                }
+                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
+                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
+                addedBundledEmitReference = isBundledEmit;
+            }
+        }
+    }
+    function writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) {
+        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit);
+        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
+        if (!emitSkipped) {
+            var declarationOutput = emitDeclarationResult.referencesOutput
+                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
+            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
+        }
+        return emitSkipped;
+        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
+            var appliedSyncOutputPos = 0;
+            var declarationOutput = "";
+            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                if (aliasEmitInfo.asynchronousOutput) {
+                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
+                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
+                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
+                }
+            });
+            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
+            return declarationOutput;
+        }
+    }
+    ts.writeDeclarationFile = writeDeclarationFile;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getResolvedExternalModuleName(host, file) {
+        return file.moduleName || ts.getExternalModuleNameFromPath(host, file.fileName);
+    }
+    ts.getResolvedExternalModuleName = getResolvedExternalModuleName;
+    function getExternalModuleNameFromDeclaration(host, resolver, declaration) {
+        var file = resolver.getExternalModuleFileFromDeclaration(declaration);
+        if (!file || ts.isDeclarationFile(file)) {
+            return undefined;
+        }
+        return getResolvedExternalModuleName(host, file);
+    }
+    ts.getExternalModuleNameFromDeclaration = getExternalModuleNameFromDeclaration;
+    var entities = {
+        "quot": 0x0022,
+        "amp": 0x0026,
+        "apos": 0x0027,
+        "lt": 0x003C,
+        "gt": 0x003E,
+        "nbsp": 0x00A0,
+        "iexcl": 0x00A1,
+        "cent": 0x00A2,
+        "pound": 0x00A3,
+        "curren": 0x00A4,
+        "yen": 0x00A5,
+        "brvbar": 0x00A6,
+        "sect": 0x00A7,
+        "uml": 0x00A8,
+        "copy": 0x00A9,
+        "ordf": 0x00AA,
+        "laquo": 0x00AB,
+        "not": 0x00AC,
+        "shy": 0x00AD,
+        "reg": 0x00AE,
+        "macr": 0x00AF,
+        "deg": 0x00B0,
+        "plusmn": 0x00B1,
+        "sup2": 0x00B2,
+        "sup3": 0x00B3,
+        "acute": 0x00B4,
+        "micro": 0x00B5,
+        "para": 0x00B6,
+        "middot": 0x00B7,
+        "cedil": 0x00B8,
+        "sup1": 0x00B9,
+        "ordm": 0x00BA,
+        "raquo": 0x00BB,
+        "frac14": 0x00BC,
+        "frac12": 0x00BD,
+        "frac34": 0x00BE,
+        "iquest": 0x00BF,
+        "Agrave": 0x00C0,
+        "Aacute": 0x00C1,
+        "Acirc": 0x00C2,
+        "Atilde": 0x00C3,
+        "Auml": 0x00C4,
+        "Aring": 0x00C5,
+        "AElig": 0x00C6,
+        "Ccedil": 0x00C7,
+        "Egrave": 0x00C8,
+        "Eacute": 0x00C9,
+        "Ecirc": 0x00CA,
+        "Euml": 0x00CB,
+        "Igrave": 0x00CC,
+        "Iacute": 0x00CD,
+        "Icirc": 0x00CE,
+        "Iuml": 0x00CF,
+        "ETH": 0x00D0,
+        "Ntilde": 0x00D1,
+        "Ograve": 0x00D2,
+        "Oacute": 0x00D3,
+        "Ocirc": 0x00D4,
+        "Otilde": 0x00D5,
+        "Ouml": 0x00D6,
+        "times": 0x00D7,
+        "Oslash": 0x00D8,
+        "Ugrave": 0x00D9,
+        "Uacute": 0x00DA,
+        "Ucirc": 0x00DB,
+        "Uuml": 0x00DC,
+        "Yacute": 0x00DD,
+        "THORN": 0x00DE,
+        "szlig": 0x00DF,
+        "agrave": 0x00E0,
+        "aacute": 0x00E1,
+        "acirc": 0x00E2,
+        "atilde": 0x00E3,
+        "auml": 0x00E4,
+        "aring": 0x00E5,
+        "aelig": 0x00E6,
+        "ccedil": 0x00E7,
+        "egrave": 0x00E8,
+        "eacute": 0x00E9,
+        "ecirc": 0x00EA,
+        "euml": 0x00EB,
+        "igrave": 0x00EC,
+        "iacute": 0x00ED,
+        "icirc": 0x00EE,
+        "iuml": 0x00EF,
+        "eth": 0x00F0,
+        "ntilde": 0x00F1,
+        "ograve": 0x00F2,
+        "oacute": 0x00F3,
+        "ocirc": 0x00F4,
+        "otilde": 0x00F5,
+        "ouml": 0x00F6,
+        "divide": 0x00F7,
+        "oslash": 0x00F8,
+        "ugrave": 0x00F9,
+        "uacute": 0x00FA,
+        "ucirc": 0x00FB,
+        "uuml": 0x00FC,
+        "yacute": 0x00FD,
+        "thorn": 0x00FE,
+        "yuml": 0x00FF,
+        "OElig": 0x0152,
+        "oelig": 0x0153,
+        "Scaron": 0x0160,
+        "scaron": 0x0161,
+        "Yuml": 0x0178,
+        "fnof": 0x0192,
+        "circ": 0x02C6,
+        "tilde": 0x02DC,
+        "Alpha": 0x0391,
+        "Beta": 0x0392,
+        "Gamma": 0x0393,
+        "Delta": 0x0394,
+        "Epsilon": 0x0395,
+        "Zeta": 0x0396,
+        "Eta": 0x0397,
+        "Theta": 0x0398,
+        "Iota": 0x0399,
+        "Kappa": 0x039A,
+        "Lambda": 0x039B,
+        "Mu": 0x039C,
+        "Nu": 0x039D,
+        "Xi": 0x039E,
+        "Omicron": 0x039F,
+        "Pi": 0x03A0,
+        "Rho": 0x03A1,
+        "Sigma": 0x03A3,
+        "Tau": 0x03A4,
+        "Upsilon": 0x03A5,
+        "Phi": 0x03A6,
+        "Chi": 0x03A7,
+        "Psi": 0x03A8,
+        "Omega": 0x03A9,
+        "alpha": 0x03B1,
+        "beta": 0x03B2,
+        "gamma": 0x03B3,
+        "delta": 0x03B4,
+        "epsilon": 0x03B5,
+        "zeta": 0x03B6,
+        "eta": 0x03B7,
+        "theta": 0x03B8,
+        "iota": 0x03B9,
+        "kappa": 0x03BA,
+        "lambda": 0x03BB,
+        "mu": 0x03BC,
+        "nu": 0x03BD,
+        "xi": 0x03BE,
+        "omicron": 0x03BF,
+        "pi": 0x03C0,
+        "rho": 0x03C1,
+        "sigmaf": 0x03C2,
+        "sigma": 0x03C3,
+        "tau": 0x03C4,
+        "upsilon": 0x03C5,
+        "phi": 0x03C6,
+        "chi": 0x03C7,
+        "psi": 0x03C8,
+        "omega": 0x03C9,
+        "thetasym": 0x03D1,
+        "upsih": 0x03D2,
+        "piv": 0x03D6,
+        "ensp": 0x2002,
+        "emsp": 0x2003,
+        "thinsp": 0x2009,
+        "zwnj": 0x200C,
+        "zwj": 0x200D,
+        "lrm": 0x200E,
+        "rlm": 0x200F,
+        "ndash": 0x2013,
+        "mdash": 0x2014,
+        "lsquo": 0x2018,
+        "rsquo": 0x2019,
+        "sbquo": 0x201A,
+        "ldquo": 0x201C,
+        "rdquo": 0x201D,
+        "bdquo": 0x201E,
+        "dagger": 0x2020,
+        "Dagger": 0x2021,
+        "bull": 0x2022,
+        "hellip": 0x2026,
+        "permil": 0x2030,
+        "prime": 0x2032,
+        "Prime": 0x2033,
+        "lsaquo": 0x2039,
+        "rsaquo": 0x203A,
+        "oline": 0x203E,
+        "frasl": 0x2044,
+        "euro": 0x20AC,
+        "image": 0x2111,
+        "weierp": 0x2118,
+        "real": 0x211C,
+        "trade": 0x2122,
+        "alefsym": 0x2135,
+        "larr": 0x2190,
+        "uarr": 0x2191,
+        "rarr": 0x2192,
+        "darr": 0x2193,
+        "harr": 0x2194,
+        "crarr": 0x21B5,
+        "lArr": 0x21D0,
+        "uArr": 0x21D1,
+        "rArr": 0x21D2,
+        "dArr": 0x21D3,
+        "hArr": 0x21D4,
+        "forall": 0x2200,
+        "part": 0x2202,
+        "exist": 0x2203,
+        "empty": 0x2205,
+        "nabla": 0x2207,
+        "isin": 0x2208,
+        "notin": 0x2209,
+        "ni": 0x220B,
+        "prod": 0x220F,
+        "sum": 0x2211,
+        "minus": 0x2212,
+        "lowast": 0x2217,
+        "radic": 0x221A,
+        "prop": 0x221D,
+        "infin": 0x221E,
+        "ang": 0x2220,
+        "and": 0x2227,
+        "or": 0x2228,
+        "cap": 0x2229,
+        "cup": 0x222A,
+        "int": 0x222B,
+        "there4": 0x2234,
+        "sim": 0x223C,
+        "cong": 0x2245,
+        "asymp": 0x2248,
+        "ne": 0x2260,
+        "equiv": 0x2261,
+        "le": 0x2264,
+        "ge": 0x2265,
+        "sub": 0x2282,
+        "sup": 0x2283,
+        "nsub": 0x2284,
+        "sube": 0x2286,
+        "supe": 0x2287,
+        "oplus": 0x2295,
+        "otimes": 0x2297,
+        "perp": 0x22A5,
+        "sdot": 0x22C5,
+        "lceil": 0x2308,
+        "rceil": 0x2309,
+        "lfloor": 0x230A,
+        "rfloor": 0x230B,
+        "lang": 0x2329,
+        "rang": 0x232A,
+        "loz": 0x25CA,
+        "spades": 0x2660,
+        "clubs": 0x2663,
+        "hearts": 0x2665,
+        "diams": 0x2666
+    };
+    function emitFiles(resolver, host, targetSourceFile) {
+        var extendsHelper = "\nvar __extends = (this && this.__extends) || function (d, b) {\n    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n    function __() { this.constructor = d; }\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n};";
+        var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n    for (var s, i = 1, n = arguments.length; i < n; i++) {\n        s = arguments[i];\n        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n            t[p] = s[p];\n    }\n    return t;\n};";
+        var decorateHelper = "\nvar __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\n};";
+        var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};";
+        var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n    return function (target, key) { decorator(target, key, paramIndex); }\n};";
+        var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n    return new (P || (P = Promise))(function (resolve, reject) {\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n        step((generator = generator.apply(thisArg, _arguments)).next());\n    });\n};";
+        var compilerOptions = host.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var modulekind = ts.getEmitModuleKind(compilerOptions);
+        var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
+        var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined;
+        var emitterDiagnostics = ts.createDiagnosticCollection();
+        var emitSkipped = false;
+        var newLine = host.getNewLine();
+        var emitJavaScript = createFileEmitter();
+        ts.forEachExpectedEmitFile(host, emitFile, targetSourceFile);
+        return {
+            emitSkipped: emitSkipped,
+            diagnostics: emitterDiagnostics.getDiagnostics(),
+            emittedFiles: emittedFilesList,
+            sourceMaps: sourceMapDataList
+        };
+        function isUniqueLocalName(name, container) {
+            for (var node = container; ts.isNodeDescendentOf(node, container); node = node.nextContainer) {
+                if (node.locals && ts.hasProperty(node.locals, name)) {
+                    if (node.locals[name].flags & (107455 | 1048576 | 8388608)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function setLabeledJump(state, isBreak, labelText, labelMarker) {
+            if (isBreak) {
+                if (!state.labeledNonLocalBreaks) {
+                    state.labeledNonLocalBreaks = {};
+                }
+                state.labeledNonLocalBreaks[labelText] = labelMarker;
+            }
+            else {
+                if (!state.labeledNonLocalContinues) {
+                    state.labeledNonLocalContinues = {};
+                }
+                state.labeledNonLocalContinues[labelText] = labelMarker;
+            }
+        }
+        function hoistVariableDeclarationFromLoop(state, declaration) {
+            if (!state.hoistedLocalVariables) {
+                state.hoistedLocalVariables = [];
+            }
+            visit(declaration.name);
+            function visit(node) {
+                if (node.kind === 69) {
+                    state.hoistedLocalVariables.push(node);
+                }
+                else {
+                    for (var _a = 0, _b = node.elements; _a < _b.length; _a++) {
+                        var element = _b[_a];
+                        visit(element.name);
+                    }
+                }
+            }
+        }
+        function createFileEmitter() {
+            var writer = ts.createTextWriter(newLine);
+            var write = writer.write, writeTextOfNode = writer.writeTextOfNode, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent;
+            var sourceMap = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? ts.createSourceMapWriter(host, writer) : ts.getNullSourceMapWriter();
+            var setSourceFile = sourceMap.setSourceFile, emitStart = sourceMap.emitStart, emitEnd = sourceMap.emitEnd, emitPos = sourceMap.emitPos;
+            var currentSourceFile;
+            var currentText;
+            var currentLineMap;
+            var currentFileIdentifiers;
+            var renamedDependencies;
+            var isEs6Module;
+            var isCurrentFileExternalModule;
+            var exportFunctionForFile;
+            var contextObjectForFile;
+            var generatedNameSet;
+            var nodeToGeneratedName;
+            var computedPropertyNamesToGeneratedNames;
+            var decoratedClassAliases;
+            var convertedLoopState;
+            var extendsEmitted;
+            var assignEmitted;
+            var decorateEmitted;
+            var paramEmitted;
+            var awaiterEmitted;
+            var tempFlags = 0;
+            var tempVariables;
+            var tempParameters;
+            var externalImports;
+            var exportSpecifiers;
+            var exportEquals;
+            var hasExportStarsToExportValues;
+            var detachedCommentsInfo;
+            var sourceMapData;
+            var isOwnFileEmit;
+            var emitLeadingCommentsOfPosition = compilerOptions.removeComments ? function (pos) { } : emitLeadingCommentsOfPositionWorker;
+            var setSourceMapWriterEmit = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? changeSourceMapEmit : function (writer) { };
+            var moduleEmitDelegates = (_a = {},
+                _a[ts.ModuleKind.ES6] = emitES6Module,
+                _a[ts.ModuleKind.AMD] = emitAMDModule,
+                _a[ts.ModuleKind.System] = emitSystemModule,
+                _a[ts.ModuleKind.UMD] = emitUMDModule,
+                _a[ts.ModuleKind.CommonJS] = emitCommonJSModule,
+                _a
+            );
+            var bundleEmitDelegates = (_b = {},
+                _b[ts.ModuleKind.ES6] = function () { },
+                _b[ts.ModuleKind.AMD] = emitAMDModule,
+                _b[ts.ModuleKind.System] = emitSystemModule,
+                _b[ts.ModuleKind.UMD] = function () { },
+                _b[ts.ModuleKind.CommonJS] = function () { },
+                _b
+            );
+            return doEmit;
+            function doEmit(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
+                sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
+                generatedNameSet = {};
+                nodeToGeneratedName = [];
+                decoratedClassAliases = [];
+                isOwnFileEmit = !isBundledEmit;
+                if (isBundledEmit && modulekind) {
+                    ts.forEach(sourceFiles, emitEmitHelpers);
+                }
+                ts.forEach(sourceFiles, emitSourceFile);
+                writeLine();
+                var sourceMappingURL = sourceMap.getSourceMappingURL();
+                if (sourceMappingURL) {
+                    write("//# sourceMappingURL=" + sourceMappingURL);
+                }
+                writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, compilerOptions.emitBOM, sourceFiles);
+                sourceMap.reset();
+                writer.reset();
+                currentSourceFile = undefined;
+                currentText = undefined;
+                currentLineMap = undefined;
+                exportFunctionForFile = undefined;
+                contextObjectForFile = undefined;
+                generatedNameSet = undefined;
+                nodeToGeneratedName = undefined;
+                decoratedClassAliases = undefined;
+                computedPropertyNamesToGeneratedNames = undefined;
+                convertedLoopState = undefined;
+                extendsEmitted = false;
+                decorateEmitted = false;
+                paramEmitted = false;
+                awaiterEmitted = false;
+                assignEmitted = false;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                externalImports = undefined;
+                exportSpecifiers = undefined;
+                exportEquals = undefined;
+                hasExportStarsToExportValues = undefined;
+                detachedCommentsInfo = undefined;
+                sourceMapData = undefined;
+                isEs6Module = false;
+                renamedDependencies = undefined;
+                isCurrentFileExternalModule = false;
+            }
+            function emitSourceFile(sourceFile) {
+                currentSourceFile = sourceFile;
+                currentText = sourceFile.text;
+                currentLineMap = ts.getLineStarts(sourceFile);
+                exportFunctionForFile = undefined;
+                contextObjectForFile = undefined;
+                isEs6Module = sourceFile.symbol && sourceFile.symbol.exports && !!sourceFile.symbol.exports["___esModule"];
+                renamedDependencies = sourceFile.renamedDependencies;
+                currentFileIdentifiers = sourceFile.identifiers;
+                isCurrentFileExternalModule = ts.isExternalModule(sourceFile);
+                setSourceFile(sourceFile);
+                emitNodeWithCommentsAndWithoutSourcemap(sourceFile);
+            }
+            function isUniqueName(name) {
+                return !resolver.hasGlobalName(name) &&
+                    !ts.hasProperty(currentFileIdentifiers, name) &&
+                    !ts.hasProperty(generatedNameSet, name);
+            }
+            function makeTempVariableName(flags) {
+                if (flags && !(tempFlags & flags)) {
+                    var name_24 = flags === 268435456 ? "_i" : "_n";
+                    if (isUniqueName(name_24)) {
+                        tempFlags |= flags;
+                        return name_24;
+                    }
+                }
+                while (true) {
+                    var count = tempFlags & 268435455;
+                    tempFlags++;
+                    if (count !== 8 && count !== 13) {
+                        var name_25 = count < 26 ? "_" + String.fromCharCode(97 + count) : "_" + (count - 26);
+                        if (isUniqueName(name_25)) {
+                            return name_25;
+                        }
+                    }
+                }
+            }
+            function makeUniqueName(baseName) {
+                if (baseName.charCodeAt(baseName.length - 1) !== 95) {
+                    baseName += "_";
+                }
+                var i = 1;
+                while (true) {
+                    var generatedName = baseName + i;
+                    if (isUniqueName(generatedName)) {
+                        return generatedNameSet[generatedName] = generatedName;
+                    }
+                    i++;
+                }
+            }
+            function generateNameForModuleOrEnum(node) {
+                var name = node.name.text;
+                return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
+            }
+            function generateNameForImportOrExportDeclaration(node) {
+                var expr = ts.getExternalModuleName(node);
+                var baseName = expr.kind === 9 ?
+                    ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module";
+                return makeUniqueName(baseName);
+            }
+            function generateNameForExportDefault() {
+                return makeUniqueName("default");
+            }
+            function generateNameForClassExpression() {
+                return makeUniqueName("class");
+            }
+            function generateNameForNode(node) {
+                switch (node.kind) {
+                    case 69:
+                        return makeUniqueName(node.text);
+                    case 225:
+                    case 224:
+                        return generateNameForModuleOrEnum(node);
+                    case 230:
+                    case 236:
+                        return generateNameForImportOrExportDeclaration(node);
+                    case 220:
+                    case 221:
+                    case 235:
+                        return generateNameForExportDefault();
+                    case 192:
+                        return generateNameForClassExpression();
+                }
+            }
+            function getGeneratedNameForNode(node) {
+                var id = ts.getNodeId(node);
+                return nodeToGeneratedName[id] || (nodeToGeneratedName[id] = ts.unescapeIdentifier(generateNameForNode(node)));
+            }
+            function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) {
+                if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
+                    ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), false, sourceFiles);
+                }
+                if (sourceMapDataList) {
+                    sourceMapDataList.push(sourceMap.getSourceMapData());
+                }
+                ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles);
+            }
+            function createTempVariable(flags) {
+                var result = ts.createSynthesizedNode(69);
+                result.text = makeTempVariableName(flags);
+                return result;
+            }
+            function recordTempDeclaration(name) {
+                if (!tempVariables) {
+                    tempVariables = [];
+                }
+                tempVariables.push(name);
+            }
+            function createAndRecordTempVariable(flags) {
+                var temp = createTempVariable(flags);
+                recordTempDeclaration(temp);
+                return temp;
+            }
+            function emitTempDeclarations(newLine) {
+                if (tempVariables) {
+                    if (newLine) {
+                        writeLine();
+                    }
+                    else {
+                        write(" ");
+                    }
+                    write("var ");
+                    emitCommaList(tempVariables);
+                    write(";");
+                }
+            }
+            function emitToken(tokenKind, startPos, emitFn) {
+                var tokenStartPos = ts.skipTrivia(currentText, startPos);
+                emitPos(tokenStartPos);
+                var tokenString = ts.tokenToString(tokenKind);
+                if (emitFn) {
+                    emitFn();
+                }
+                else {
+                    write(tokenString);
+                }
+                var tokenEndPos = tokenStartPos + tokenString.length;
+                emitPos(tokenEndPos);
+                return tokenEndPos;
+            }
+            function emitOptional(prefix, node) {
+                if (node) {
+                    write(prefix);
+                    emit(node);
+                }
+            }
+            function emitParenthesizedIf(node, parenthesized) {
+                if (parenthesized) {
+                    write("(");
+                }
+                emit(node);
+                if (parenthesized) {
+                    write(")");
+                }
+            }
+            function emitLinePreservingList(parent, nodes, allowTrailingComma, spacesBetweenBraces) {
+                ts.Debug.assert(nodes.length > 0);
+                increaseIndent();
+                if (nodeStartPositionsAreOnSameLine(parent, nodes[0])) {
+                    if (spacesBetweenBraces) {
+                        write(" ");
+                    }
+                }
+                else {
+                    writeLine();
+                }
+                for (var i = 0, n = nodes.length; i < n; i++) {
+                    if (i) {
+                        if (nodeEndIsOnSameLineAsNodeStart(nodes[i - 1], nodes[i])) {
+                            write(", ");
+                        }
+                        else {
+                            write(",");
+                            writeLine();
+                        }
+                    }
+                    emit(nodes[i]);
+                }
+                if (nodes.hasTrailingComma && allowTrailingComma) {
+                    write(",");
+                }
+                decreaseIndent();
+                if (nodeEndPositionsAreOnSameLine(parent, ts.lastOrUndefined(nodes))) {
+                    if (spacesBetweenBraces) {
+                        write(" ");
+                    }
+                }
+                else {
+                    writeLine();
+                }
+            }
+            function emitList(nodes, start, count, multiLine, trailingComma, leadingComma, noTrailingNewLine, emitNode) {
+                if (!emitNode) {
+                    emitNode = emit;
+                }
+                for (var i = 0; i < count; i++) {
+                    if (multiLine) {
+                        if (i || leadingComma) {
+                            write(",");
+                        }
+                        writeLine();
+                    }
+                    else {
+                        if (i || leadingComma) {
+                            write(", ");
+                        }
+                    }
+                    var node = nodes[start + i];
+                    emitTrailingCommentsOfPosition(node.pos);
+                    emitNode(node);
+                    leadingComma = true;
+                }
+                if (trailingComma) {
+                    write(",");
+                }
+                if (multiLine && !noTrailingNewLine) {
+                    writeLine();
+                }
+                return count;
+            }
+            function emitCommaList(nodes) {
+                if (nodes) {
+                    emitList(nodes, 0, nodes.length, false, false);
+                }
+            }
+            function emitLines(nodes) {
+                emitLinesStartingAt(nodes, 0);
+            }
+            function emitLinesStartingAt(nodes, startIndex) {
+                for (var i = startIndex; i < nodes.length; i++) {
+                    writeLine();
+                    emit(nodes[i]);
+                }
+            }
+            function isBinaryOrOctalIntegerLiteral(node, text) {
+                if (node.kind === 8 && text.length > 1) {
+                    switch (text.charCodeAt(1)) {
+                        case 98:
+                        case 66:
+                        case 111:
+                        case 79:
+                            return true;
+                    }
+                }
+                return false;
+            }
+            function emitLiteral(node) {
+                var text = getLiteralText(node);
+                if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap) && (node.kind === 9 || ts.isTemplateLiteralKind(node.kind))) {
+                    writer.writeLiteral(text);
+                }
+                else if (languageVersion < 2 && isBinaryOrOctalIntegerLiteral(node, text)) {
+                    write(node.text);
+                }
+                else {
+                    write(text);
+                }
+            }
+            function getLiteralText(node) {
+                if (languageVersion < 2 && (ts.isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) {
+                    return getQuotedEscapedLiteralText('"', node.text, '"');
+                }
+                if (node.parent) {
+                    return ts.getTextOfNodeFromSourceText(currentText, node);
+                }
+                switch (node.kind) {
+                    case 9:
+                        return getQuotedEscapedLiteralText('"', node.text, '"');
+                    case 11:
+                        return getQuotedEscapedLiteralText("`", node.text, "`");
+                    case 12:
+                        return getQuotedEscapedLiteralText("`", node.text, "${");
+                    case 13:
+                        return getQuotedEscapedLiteralText("}", node.text, "${");
+                    case 14:
+                        return getQuotedEscapedLiteralText("}", node.text, "`");
+                    case 8:
+                        return node.text;
+                }
+                ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
+            }
+            function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) {
+                return leftQuote + ts.escapeNonAsciiCharacters(ts.escapeString(text)) + rightQuote;
+            }
+            function emitDownlevelRawTemplateLiteral(node) {
+                var text = ts.getTextOfNodeFromSourceText(currentText, node);
+                var isLast = node.kind === 11 || node.kind === 14;
+                text = text.substring(1, text.length - (isLast ? 1 : 2));
+                text = text.replace(/\r\n?/g, "\n");
+                text = ts.escapeString(text);
+                write("\"" + text + "\"");
+            }
+            function emitDownlevelTaggedTemplateArray(node, literalEmitter) {
+                write("[");
+                if (node.template.kind === 11) {
+                    literalEmitter(node.template);
+                }
+                else {
+                    literalEmitter(node.template.head);
+                    ts.forEach(node.template.templateSpans, function (child) {
+                        write(", ");
+                        literalEmitter(child.literal);
+                    });
+                }
+                write("]");
+            }
+            function emitDownlevelTaggedTemplate(node) {
+                var tempVariable = createAndRecordTempVariable(0);
+                write("(");
+                emit(tempVariable);
+                write(" = ");
+                emitDownlevelTaggedTemplateArray(node, emit);
+                write(", ");
+                emit(tempVariable);
+                write(".raw = ");
+                emitDownlevelTaggedTemplateArray(node, emitDownlevelRawTemplateLiteral);
+                write(", ");
+                emitParenthesizedIf(node.tag, needsParenthesisForPropertyAccessOrInvocation(node.tag));
+                write("(");
+                emit(tempVariable);
+                if (node.template.kind === 189) {
+                    ts.forEach(node.template.templateSpans, function (templateSpan) {
+                        write(", ");
+                        var needsParens = templateSpan.expression.kind === 187
+                            && templateSpan.expression.operatorToken.kind === 24;
+                        emitParenthesizedIf(templateSpan.expression, needsParens);
+                    });
+                }
+                write("))");
+            }
+            function emitTemplateExpression(node) {
+                if (languageVersion >= 2) {
+                    ts.forEachChild(node, emit);
+                    return;
+                }
+                var emitOuterParens = ts.isExpression(node.parent)
+                    && templateNeedsParens(node, node.parent);
+                if (emitOuterParens) {
+                    write("(");
+                }
+                var headEmitted = false;
+                if (shouldEmitTemplateHead()) {
+                    emitLiteral(node.head);
+                    headEmitted = true;
+                }
+                for (var i = 0, n = node.templateSpans.length; i < n; i++) {
+                    var templateSpan = node.templateSpans[i];
+                    var needsParens = templateSpan.expression.kind !== 178
+                        && comparePrecedenceToBinaryPlus(templateSpan.expression) !== 1;
+                    if (i > 0 || headEmitted) {
+                        write(" + ");
+                    }
+                    emitParenthesizedIf(templateSpan.expression, needsParens);
+                    if (templateSpan.literal.text.length !== 0) {
+                        write(" + ");
+                        emitLiteral(templateSpan.literal);
+                    }
+                }
+                if (emitOuterParens) {
+                    write(")");
+                }
+                function shouldEmitTemplateHead() {
+                    ts.Debug.assert(node.templateSpans.length !== 0);
+                    return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0;
+                }
+                function templateNeedsParens(template, parent) {
+                    switch (parent.kind) {
+                        case 174:
+                        case 175:
+                            return parent.expression === template;
+                        case 176:
+                        case 178:
+                            return false;
+                        default:
+                            return comparePrecedenceToBinaryPlus(parent) !== -1;
+                    }
+                }
+                function comparePrecedenceToBinaryPlus(expression) {
+                    switch (expression.kind) {
+                        case 187:
+                            switch (expression.operatorToken.kind) {
+                                case 37:
+                                case 39:
+                                case 40:
+                                    return 1;
+                                case 35:
+                                case 36:
+                                    return 0;
+                                default:
+                                    return -1;
+                            }
+                        case 190:
+                        case 188:
+                            return -1;
+                        default:
+                            return 1;
+                    }
+                }
+            }
+            function emitTemplateSpan(span) {
+                emit(span.expression);
+                emit(span.literal);
+            }
+            function jsxEmitReact(node) {
+                function emitTagName(name) {
+                    if (name.kind === 69 && ts.isIntrinsicJsxName(name.text)) {
+                        write('"');
+                        emit(name);
+                        write('"');
+                    }
+                    else {
+                        emit(name);
+                    }
+                }
+                function emitAttributeName(name) {
+                    if (/^[A-Za-z_]\w*$/.test(name.text)) {
+                        emit(name);
+                    }
+                    else {
+                        write('"');
+                        emit(name);
+                        write('"');
+                    }
+                }
+                function emitJsxAttribute(node) {
+                    emitAttributeName(node.name);
+                    write(": ");
+                    if (node.initializer) {
+                        emit(node.initializer);
+                    }
+                    else {
+                        write("true");
+                    }
+                }
+                function emitJsxElement(openingNode, children) {
+                    var syntheticReactRef = ts.createSynthesizedNode(69);
+                    syntheticReactRef.text = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
+                    syntheticReactRef.parent = openingNode;
+                    emitLeadingComments(openingNode);
+                    emitExpressionIdentifier(syntheticReactRef);
+                    write(".createElement(");
+                    emitTagName(openingNode.tagName);
+                    write(", ");
+                    if (openingNode.attributes.length === 0) {
+                        write("null");
+                    }
+                    else {
+                        var attrs = openingNode.attributes;
+                        if (ts.forEach(attrs, function (attr) { return attr.kind === 247; })) {
+                            write("__assign(");
+                            var haveOpenedObjectLiteral = false;
+                            for (var i = 0; i < attrs.length; i++) {
+                                if (attrs[i].kind === 247) {
+                                    if (i === 0) {
+                                        write("{}, ");
+                                    }
+                                    if (haveOpenedObjectLiteral) {
+                                        write("}");
+                                        haveOpenedObjectLiteral = false;
+                                    }
+                                    if (i > 0) {
+                                        write(", ");
+                                    }
+                                    emit(attrs[i].expression);
+                                }
+                                else {
+                                    ts.Debug.assert(attrs[i].kind === 246);
+                                    if (haveOpenedObjectLiteral) {
+                                        write(", ");
+                                    }
+                                    else {
+                                        haveOpenedObjectLiteral = true;
+                                        if (i > 0) {
+                                            write(", ");
+                                        }
+                                        write("{");
+                                    }
+                                    emitJsxAttribute(attrs[i]);
+                                }
+                            }
+                            if (haveOpenedObjectLiteral)
+                                write("}");
+                            write(")");
+                        }
+                        else {
+                            write("{");
+                            for (var i = 0, n = attrs.length; i < n; i++) {
+                                if (i > 0) {
+                                    write(", ");
+                                }
+                                emitJsxAttribute(attrs[i]);
+                            }
+                            write("}");
+                        }
+                    }
+                    if (children) {
+                        var firstChild = void 0;
+                        var multipleEmittableChildren = false;
+                        for (var i = 0, n = children.length; i < n; i++) {
+                            var jsxChild = children[i];
+                            if (isJsxChildEmittable(jsxChild)) {
+                                if (!firstChild) {
+                                    write(", ");
+                                    firstChild = jsxChild;
+                                }
+                                else {
+                                    if (!multipleEmittableChildren) {
+                                        multipleEmittableChildren = true;
+                                        increaseIndent();
+                                        writeLine();
+                                        emit(firstChild);
+                                    }
+                                    write(", ");
+                                    writeLine();
+                                    emit(jsxChild);
+                                }
+                            }
+                        }
+                        if (multipleEmittableChildren) {
+                            decreaseIndent();
+                        }
+                        else if (firstChild) {
+                            if (firstChild.kind !== 241 && firstChild.kind !== 242) {
+                                emit(firstChild);
+                            }
+                            else {
+                                increaseIndent();
+                                writeLine();
+                                emit(firstChild);
+                                writeLine();
+                                decreaseIndent();
+                            }
+                        }
+                    }
+                    write(")");
+                    emitTrailingComments(openingNode);
+                }
+                if (node.kind === 241) {
+                    emitJsxElement(node.openingElement, node.children);
+                }
+                else {
+                    ts.Debug.assert(node.kind === 242);
+                    emitJsxElement(node);
+                }
+            }
+            function jsxEmitPreserve(node) {
+                function emitJsxAttribute(node) {
+                    emit(node.name);
+                    if (node.initializer) {
+                        write("=");
+                        emit(node.initializer);
+                    }
+                }
+                function emitJsxSpreadAttribute(node) {
+                    write("{...");
+                    emit(node.expression);
+                    write("}");
+                }
+                function emitAttributes(attribs) {
+                    for (var i = 0, n = attribs.length; i < n; i++) {
+                        if (i > 0) {
+                            write(" ");
+                        }
+                        if (attribs[i].kind === 247) {
+                            emitJsxSpreadAttribute(attribs[i]);
+                        }
+                        else {
+                            ts.Debug.assert(attribs[i].kind === 246);
+                            emitJsxAttribute(attribs[i]);
+                        }
+                    }
+                }
+                function emitJsxOpeningOrSelfClosingElement(node) {
+                    write("<");
+                    emit(node.tagName);
+                    if (node.attributes.length > 0 || (node.kind === 242)) {
+                        write(" ");
+                    }
+                    emitAttributes(node.attributes);
+                    if (node.kind === 242) {
+                        write("/>");
+                    }
+                    else {
+                        write(">");
+                    }
+                }
+                function emitJsxClosingElement(node) {
+                    write("</");
+                    emit(node.tagName);
+                    write(">");
+                }
+                function emitJsxElement(node) {
+                    emitJsxOpeningOrSelfClosingElement(node.openingElement);
+                    for (var i = 0, n = node.children.length; i < n; i++) {
+                        emit(node.children[i]);
+                    }
+                    emitJsxClosingElement(node.closingElement);
+                }
+                if (node.kind === 241) {
+                    emitJsxElement(node);
+                }
+                else {
+                    ts.Debug.assert(node.kind === 242);
+                    emitJsxOpeningOrSelfClosingElement(node);
+                }
+            }
+            function emitExpressionForPropertyName(node) {
+                ts.Debug.assert(node.kind !== 169);
+                if (node.kind === 9) {
+                    emitLiteral(node);
+                }
+                else if (node.kind === 140) {
+                    if (ts.nodeIsDecorated(node.parent)) {
+                        if (!computedPropertyNamesToGeneratedNames) {
+                            computedPropertyNamesToGeneratedNames = [];
+                        }
+                        var generatedName = computedPropertyNamesToGeneratedNames[ts.getNodeId(node)];
+                        if (generatedName) {
+                            write(generatedName);
+                            return;
+                        }
+                        generatedName = createAndRecordTempVariable(0).text;
+                        computedPropertyNamesToGeneratedNames[ts.getNodeId(node)] = generatedName;
+                        write(generatedName);
+                        write(" = ");
+                    }
+                    emit(node.expression);
+                }
+                else {
+                    write('"');
+                    if (node.kind === 8) {
+                        write(node.text);
+                    }
+                    else {
+                        writeTextOfNode(currentText, node);
+                    }
+                    write('"');
+                }
+            }
+            function isExpressionIdentifier(node) {
+                var parent = node.parent;
+                switch (parent.kind) {
+                    case 170:
+                    case 195:
+                    case 184:
+                    case 187:
+                    case 174:
+                    case 249:
+                    case 140:
+                    case 188:
+                    case 143:
+                    case 181:
+                    case 204:
+                    case 173:
+                    case 235:
+                    case 202:
+                    case 194:
+                    case 206:
+                    case 207:
+                    case 208:
+                    case 203:
+                    case 245:
+                    case 242:
+                    case 243:
+                    case 247:
+                    case 248:
+                    case 175:
+                    case 196:
+                    case 178:
+                    case 186:
+                    case 185:
+                    case 211:
+                    case 254:
+                    case 191:
+                    case 213:
+                    case 176:
+                    case 197:
+                    case 215:
+                    case 177:
+                    case 182:
+                    case 183:
+                    case 205:
+                    case 212:
+                    case 190:
+                        return true;
+                    case 169:
+                    case 255:
+                    case 142:
+                    case 253:
+                    case 145:
+                    case 218:
+                        return parent.initializer === node;
+                    case 172:
+                        return parent.expression === node;
+                    case 180:
+                    case 179:
+                        return parent.body === node;
+                    case 229:
+                        return parent.moduleReference === node;
+                    case 139:
+                        return parent.left === node;
+                }
+                return false;
+            }
+            function emitExpressionIdentifier(node) {
+                var container = resolver.getReferencedExportContainer(node);
+                if (container) {
+                    if (container.kind === 256) {
+                        if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
+                            write("exports.");
+                        }
+                    }
+                    else {
+                        write(getGeneratedNameForNode(container));
+                        write(".");
+                    }
+                }
+                else {
+                    if (modulekind !== ts.ModuleKind.ES6) {
+                        var declaration = resolver.getReferencedImportDeclaration(node);
+                        if (declaration) {
+                            if (declaration.kind === 231) {
+                                write(getGeneratedNameForNode(declaration.parent));
+                                write(languageVersion === 0 ? '["default"]' : ".default");
+                                return;
+                            }
+                            else if (declaration.kind === 234) {
+                                write(getGeneratedNameForNode(declaration.parent.parent.parent));
+                                var name_26 = declaration.propertyName || declaration.name;
+                                var identifier = ts.getTextOfNodeFromSourceText(currentText, name_26);
+                                if (languageVersion === 0 && identifier === "default") {
+                                    write('["default"]');
+                                }
+                                else {
+                                    write(".");
+                                    write(identifier);
+                                }
+                                return;
+                            }
+                        }
+                    }
+                    if (languageVersion < 2) {
+                        var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
+                        if (declaration) {
+                            write(getGeneratedNameForNode(declaration.name));
+                            return;
+                        }
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & 1048576) {
+                        var declaration = resolver.getReferencedValueDeclaration(node);
+                        if (declaration) {
+                            var classAlias = decoratedClassAliases[ts.getNodeId(declaration)];
+                            if (classAlias !== undefined) {
+                                write(classAlias);
+                                return;
+                            }
+                        }
+                    }
+                }
+                if (ts.nodeIsSynthesized(node)) {
+                    write(node.text);
+                }
+                else {
+                    writeTextOfNode(currentText, node);
+                }
+            }
+            function isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node) {
+                if (languageVersion < 2) {
+                    var parent_13 = node.parent;
+                    switch (parent_13.kind) {
+                        case 169:
+                        case 221:
+                        case 224:
+                        case 218:
+                            return parent_13.name === node && resolver.isDeclarationWithCollidingName(parent_13);
+                    }
+                }
+                return false;
+            }
+            function emitIdentifier(node) {
+                if (convertedLoopState) {
+                    if (node.text == "arguments" && resolver.isArgumentsLocalBinding(node)) {
+                        var name_27 = convertedLoopState.argumentsName || (convertedLoopState.argumentsName = makeUniqueName("arguments"));
+                        write(name_27);
+                        return;
+                    }
+                }
+                if (!node.parent) {
+                    write(node.text);
+                }
+                else if (isExpressionIdentifier(node)) {
+                    emitExpressionIdentifier(node);
+                }
+                else if (isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node)) {
+                    write(getGeneratedNameForNode(node));
+                }
+                else if (ts.nodeIsSynthesized(node)) {
+                    write(node.text);
+                }
+                else {
+                    writeTextOfNode(currentText, node);
+                }
+            }
+            function emitThis(node) {
+                if (resolver.getNodeCheckFlags(node) & 2) {
+                    write("_this");
+                }
+                else if (convertedLoopState) {
+                    write(convertedLoopState.thisName || (convertedLoopState.thisName = makeUniqueName("this")));
+                }
+                else {
+                    write("this");
+                }
+            }
+            function emitSuper(node) {
+                if (languageVersion >= 2) {
+                    write("super");
+                }
+                else {
+                    var flags = resolver.getNodeCheckFlags(node);
+                    if (flags & 256) {
+                        write("_super.prototype");
+                    }
+                    else {
+                        write("_super");
+                    }
+                }
+            }
+            function emitObjectBindingPattern(node) {
+                write("{ ");
+                var elements = node.elements;
+                emitList(elements, 0, elements.length, false, elements.hasTrailingComma);
+                write(" }");
+            }
+            function emitArrayBindingPattern(node) {
+                write("[");
+                var elements = node.elements;
+                emitList(elements, 0, elements.length, false, elements.hasTrailingComma);
+                write("]");
+            }
+            function emitBindingElement(node) {
+                if (node.propertyName) {
+                    emit(node.propertyName);
+                    write(": ");
+                }
+                if (node.dotDotDotToken) {
+                    write("...");
+                }
+                if (ts.isBindingPattern(node.name)) {
+                    emit(node.name);
+                }
+                else {
+                    emitModuleMemberName(node);
+                }
+                emitOptional(" = ", node.initializer);
+            }
+            function emitSpreadElementExpression(node) {
+                write("...");
+                emit(node.expression);
+            }
+            function emitYieldExpression(node) {
+                write(ts.tokenToString(114));
+                if (node.asteriskToken) {
+                    write("*");
+                }
+                if (node.expression) {
+                    write(" ");
+                    emit(node.expression);
+                }
+            }
+            function emitAwaitExpression(node) {
+                var needsParenthesis = needsParenthesisForAwaitExpressionAsYield(node);
+                if (needsParenthesis) {
+                    write("(");
+                }
+                write(ts.tokenToString(114));
+                write(" ");
+                emit(node.expression);
+                if (needsParenthesis) {
+                    write(")");
+                }
+            }
+            function needsParenthesisForAwaitExpressionAsYield(node) {
+                if (node.parent.kind === 187 && !ts.isAssignmentOperator(node.parent.operatorToken.kind)) {
+                    return true;
+                }
+                else if (node.parent.kind === 188 && node.parent.condition === node) {
+                    return true;
+                }
+                return false;
+            }
+            function needsParenthesisForPropertyAccessOrInvocation(node) {
+                switch (node.kind) {
+                    case 69:
+                    case 170:
+                    case 172:
+                    case 173:
+                    case 174:
+                    case 178:
+                        return false;
+                }
+                return true;
+            }
+            function emitListWithSpread(elements, needsUniqueCopy, multiLine, trailingComma, useConcat) {
+                var pos = 0;
+                var group = 0;
+                var length = elements.length;
+                while (pos < length) {
+                    if (group === 1 && useConcat) {
+                        write(".concat(");
+                    }
+                    else if (group > 0) {
+                        write(", ");
+                    }
+                    var e = elements[pos];
+                    if (e.kind === 191) {
+                        e = e.expression;
+                        emitParenthesizedIf(e, group === 0 && needsParenthesisForPropertyAccessOrInvocation(e));
+                        pos++;
+                        if (pos === length && group === 0 && needsUniqueCopy && e.kind !== 170) {
+                            write(".slice()");
+                        }
+                    }
+                    else {
+                        var i = pos;
+                        while (i < length && elements[i].kind !== 191) {
+                            i++;
+                        }
+                        write("[");
+                        if (multiLine) {
+                            increaseIndent();
+                        }
+                        emitList(elements, pos, i - pos, multiLine, trailingComma && i === length);
+                        if (multiLine) {
+                            decreaseIndent();
+                        }
+                        write("]");
+                        pos = i;
+                    }
+                    group++;
+                }
+                if (group > 1) {
+                    if (useConcat) {
+                        write(")");
+                    }
+                }
+            }
+            function isSpreadElementExpression(node) {
+                return node.kind === 191;
+            }
+            function emitArrayLiteral(node) {
+                var elements = node.elements;
+                if (elements.length === 0) {
+                    write("[]");
+                }
+                else if (languageVersion >= 2 || !ts.forEach(elements, isSpreadElementExpression)) {
+                    write("[");
+                    emitLinePreservingList(node, node.elements, elements.hasTrailingComma, false);
+                    write("]");
+                }
+                else {
+                    emitListWithSpread(elements, true, node.multiLine, elements.hasTrailingComma, true);
+                }
+            }
+            function emitObjectLiteralBody(node, numElements) {
+                if (numElements === 0) {
+                    write("{}");
+                    return;
+                }
+                write("{");
+                if (numElements > 0) {
+                    var properties = node.properties;
+                    if (numElements === properties.length) {
+                        emitLinePreservingList(node, properties, languageVersion >= 1, true);
+                    }
+                    else {
+                        var multiLine = node.multiLine;
+                        if (!multiLine) {
+                            write(" ");
+                        }
+                        else {
+                            increaseIndent();
+                        }
+                        emitList(properties, 0, numElements, multiLine, false);
+                        if (!multiLine) {
+                            write(" ");
+                        }
+                        else {
+                            decreaseIndent();
+                        }
+                    }
+                }
+                write("}");
+            }
+            function emitDownlevelObjectLiteralWithComputedProperties(node, firstComputedPropertyIndex) {
+                var multiLine = node.multiLine;
+                var properties = node.properties;
+                write("(");
+                if (multiLine) {
+                    increaseIndent();
+                }
+                var tempVar = createAndRecordTempVariable(0);
+                emit(tempVar);
+                write(" = ");
+                emitObjectLiteralBody(node, firstComputedPropertyIndex);
+                for (var i = firstComputedPropertyIndex, n = properties.length; i < n; i++) {
+                    writeComma();
+                    var property = properties[i];
+                    emitStart(property);
+                    if (property.kind === 149 || property.kind === 150) {
+                        var accessors = ts.getAllAccessorDeclarations(node.properties, property);
+                        if (property !== accessors.firstAccessor) {
+                            continue;
+                        }
+                        write("Object.defineProperty(");
+                        emit(tempVar);
+                        write(", ");
+                        emitStart(property.name);
+                        emitExpressionForPropertyName(property.name);
+                        emitEnd(property.name);
+                        write(", {");
+                        increaseIndent();
+                        if (accessors.getAccessor) {
+                            writeLine();
+                            emitLeadingComments(accessors.getAccessor);
+                            write("get: ");
+                            emitStart(accessors.getAccessor);
+                            write("function ");
+                            emitSignatureAndBody(accessors.getAccessor);
+                            emitEnd(accessors.getAccessor);
+                            emitTrailingComments(accessors.getAccessor);
+                            write(",");
+                        }
+                        if (accessors.setAccessor) {
+                            writeLine();
+                            emitLeadingComments(accessors.setAccessor);
+                            write("set: ");
+                            emitStart(accessors.setAccessor);
+                            write("function ");
+                            emitSignatureAndBody(accessors.setAccessor);
+                            emitEnd(accessors.setAccessor);
+                            emitTrailingComments(accessors.setAccessor);
+                            write(",");
+                        }
+                        writeLine();
+                        write("enumerable: true,");
+                        writeLine();
+                        write("configurable: true");
+                        decreaseIndent();
+                        writeLine();
+                        write("})");
+                        emitEnd(property);
+                    }
+                    else {
+                        emitLeadingComments(property);
+                        emitStart(property.name);
+                        emit(tempVar);
+                        emitMemberAccessForPropertyName(property.name);
+                        emitEnd(property.name);
+                        write(" = ");
+                        if (property.kind === 253) {
+                            emit(property.initializer);
+                        }
+                        else if (property.kind === 254) {
+                            emitExpressionIdentifier(property.name);
+                        }
+                        else if (property.kind === 147) {
+                            emitFunctionDeclaration(property);
+                        }
+                        else {
+                            ts.Debug.fail("ObjectLiteralElement type not accounted for: " + property.kind);
+                        }
+                    }
+                    emitEnd(property);
+                }
+                writeComma();
+                emit(tempVar);
+                if (multiLine) {
+                    decreaseIndent();
+                    writeLine();
+                }
+                write(")");
+                function writeComma() {
+                    if (multiLine) {
+                        write(",");
+                        writeLine();
+                    }
+                    else {
+                        write(", ");
+                    }
+                }
+            }
+            function emitObjectLiteral(node) {
+                var properties = node.properties;
+                if (languageVersion < 2) {
+                    var numProperties = properties.length;
+                    var numInitialNonComputedProperties = numProperties;
+                    for (var i = 0, n = properties.length; i < n; i++) {
+                        if (properties[i].name.kind === 140) {
+                            numInitialNonComputedProperties = i;
+                            break;
+                        }
+                    }
+                    var hasComputedProperty = numInitialNonComputedProperties !== properties.length;
+                    if (hasComputedProperty) {
+                        emitDownlevelObjectLiteralWithComputedProperties(node, numInitialNonComputedProperties);
+                        return;
+                    }
+                }
+                emitObjectLiteralBody(node, properties.length);
+            }
+            function createBinaryExpression(left, operator, right, startsOnNewLine) {
+                var result = ts.createSynthesizedNode(187, startsOnNewLine);
+                result.operatorToken = ts.createSynthesizedNode(operator);
+                result.left = left;
+                result.right = right;
+                return result;
+            }
+            function createPropertyAccessExpression(expression, name) {
+                var result = ts.createSynthesizedNode(172);
+                result.expression = parenthesizeForAccess(expression);
+                result.dotToken = ts.createSynthesizedNode(21);
+                result.name = name;
+                return result;
+            }
+            function createElementAccessExpression(expression, argumentExpression) {
+                var result = ts.createSynthesizedNode(173);
+                result.expression = parenthesizeForAccess(expression);
+                result.argumentExpression = argumentExpression;
+                return result;
+            }
+            function parenthesizeForAccess(expr) {
+                while (expr.kind === 177 ||
+                    expr.kind === 195 ||
+                    expr.kind === 196) {
+                    expr = expr.expression;
+                }
+                if (ts.isLeftHandSideExpression(expr) &&
+                    expr.kind !== 175 &&
+                    expr.kind !== 8) {
+                    return expr;
+                }
+                var node = ts.createSynthesizedNode(178);
+                node.expression = expr;
+                return node;
+            }
+            function emitComputedPropertyName(node) {
+                write("[");
+                emitExpressionForPropertyName(node);
+                write("]");
+            }
+            function emitMethod(node) {
+                if (languageVersion >= 2 && node.asteriskToken) {
+                    write("*");
+                }
+                emit(node.name);
+                if (languageVersion < 2) {
+                    write(": function ");
+                }
+                emitSignatureAndBody(node);
+            }
+            function emitPropertyAssignment(node) {
+                emit(node.name);
+                write(": ");
+                emitTrailingCommentsOfPosition(node.initializer.pos);
+                emit(node.initializer);
+            }
+            function isNamespaceExportReference(node) {
+                var container = resolver.getReferencedExportContainer(node);
+                return container && container.kind !== 256;
+            }
+            function isImportedReference(node) {
+                var declaration = resolver.getReferencedImportDeclaration(node);
+                return declaration && (declaration.kind === 231 || declaration.kind === 234);
+            }
+            function emitShorthandPropertyAssignment(node) {
+                writeTextOfNode(currentText, node.name);
+                if (languageVersion < 2 || (modulekind !== ts.ModuleKind.ES6 && isImportedReference(node.name)) || isNamespaceExportReference(node.name)) {
+                    write(": ");
+                    emit(node.name);
+                }
+                if (languageVersion >= 2 && node.objectAssignmentInitializer) {
+                    write(" = ");
+                    emit(node.objectAssignmentInitializer);
+                }
+            }
+            function tryEmitConstantValue(node) {
+                var constantValue = tryGetConstEnumValue(node);
+                if (constantValue !== undefined) {
+                    write(constantValue.toString());
+                    if (!compilerOptions.removeComments) {
+                        var propertyName = node.kind === 172 ? ts.declarationNameToString(node.name) : ts.getTextOfNode(node.argumentExpression);
+                        write(" /* " + propertyName + " */");
+                    }
+                    return true;
+                }
+                return false;
+            }
+            function tryGetConstEnumValue(node) {
+                if (compilerOptions.isolatedModules) {
+                    return undefined;
+                }
+                return node.kind === 172 || node.kind === 173
+                    ? resolver.getConstantValue(node)
+                    : undefined;
+            }
+            function indentIfOnDifferentLines(parent, node1, node2, valueToWriteWhenNotIndenting) {
+                var realNodesAreOnDifferentLines = !ts.nodeIsSynthesized(parent) && !nodeEndIsOnSameLineAsNodeStart(node1, node2);
+                var synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2);
+                if (realNodesAreOnDifferentLines || synthesizedNodeIsOnDifferentLine) {
+                    increaseIndent();
+                    writeLine();
+                    return true;
+                }
+                else {
+                    if (valueToWriteWhenNotIndenting) {
+                        write(valueToWriteWhenNotIndenting);
+                    }
+                    return false;
+                }
+            }
+            function emitPropertyAccess(node) {
+                if (tryEmitConstantValue(node)) {
+                    return;
+                }
+                if (languageVersion === 2 &&
+                    node.expression.kind === 95 &&
+                    isInAsyncMethodWithSuperInES6(node)) {
+                    var name_28 = ts.createSynthesizedNode(9);
+                    name_28.text = node.name.text;
+                    emitSuperAccessInAsyncMethod(node.expression, name_28);
+                    return;
+                }
+                emit(node.expression);
+                var indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, node.dotToken);
+                var shouldEmitSpace = false;
+                if (!indentedBeforeDot) {
+                    if (node.expression.kind === 8) {
+                        var text = ts.getTextOfNodeFromSourceText(currentText, node.expression);
+                        shouldEmitSpace = text.indexOf(ts.tokenToString(21)) < 0;
+                    }
+                    else {
+                        var constantValue = tryGetConstEnumValue(node.expression);
+                        shouldEmitSpace = isFinite(constantValue) && Math.floor(constantValue) === constantValue;
+                    }
+                }
+                if (shouldEmitSpace) {
+                    write(" .");
+                }
+                else {
+                    write(".");
+                }
+                var indentedAfterDot = indentIfOnDifferentLines(node, node.dotToken, node.name);
+                emit(node.name);
+                decreaseIndentIf(indentedBeforeDot, indentedAfterDot);
+            }
+            function emitQualifiedName(node) {
+                emit(node.left);
+                write(".");
+                emit(node.right);
+            }
+            function emitQualifiedNameAsExpression(node, useFallback) {
+                if (node.left.kind === 69) {
+                    emitEntityNameAsExpression(node.left, useFallback);
+                }
+                else if (useFallback) {
+                    var temp = createAndRecordTempVariable(0);
+                    write("(");
+                    emitNodeWithoutSourceMap(temp);
+                    write(" = ");
+                    emitEntityNameAsExpression(node.left, true);
+                    write(") && ");
+                    emitNodeWithoutSourceMap(temp);
+                }
+                else {
+                    emitEntityNameAsExpression(node.left, false);
+                }
+                write(".");
+                emit(node.right);
+            }
+            function emitEntityNameAsExpression(node, useFallback) {
+                switch (node.kind) {
+                    case 69:
+                        if (useFallback) {
+                            write("typeof ");
+                            emitExpressionIdentifier(node);
+                            write(" !== 'undefined' && ");
+                        }
+                        emitExpressionIdentifier(node);
+                        break;
+                    case 139:
+                        emitQualifiedNameAsExpression(node, useFallback);
+                        break;
+                    default:
+                        emitNodeWithoutSourceMap(node);
+                        break;
+                }
+            }
+            function emitIndexedAccess(node) {
+                if (tryEmitConstantValue(node)) {
+                    return;
+                }
+                if (languageVersion === 2 &&
+                    node.expression.kind === 95 &&
+                    isInAsyncMethodWithSuperInES6(node)) {
+                    emitSuperAccessInAsyncMethod(node.expression, node.argumentExpression);
+                    return;
+                }
+                emit(node.expression);
+                write("[");
+                emit(node.argumentExpression);
+                write("]");
+            }
+            function hasSpreadElement(elements) {
+                return ts.forEach(elements, function (e) { return e.kind === 191; });
+            }
+            function skipParentheses(node) {
+                while (node.kind === 178 ||
+                    node.kind === 177 ||
+                    node.kind === 195 ||
+                    node.kind === 196) {
+                    node = node.expression;
+                }
+                return node;
+            }
+            function emitCallTarget(node) {
+                if (node.kind === 69 || node.kind === 97 || node.kind === 95) {
+                    emit(node);
+                    return node;
+                }
+                var temp = createAndRecordTempVariable(0);
+                write("(");
+                emit(temp);
+                write(" = ");
+                emit(node);
+                write(")");
+                return temp;
+            }
+            function emitCallWithSpread(node) {
+                var target;
+                var expr = skipParentheses(node.expression);
+                if (expr.kind === 172) {
+                    target = emitCallTarget(expr.expression);
+                    write(".");
+                    emit(expr.name);
+                }
+                else if (expr.kind === 173) {
+                    target = emitCallTarget(expr.expression);
+                    write("[");
+                    emit(expr.argumentExpression);
+                    write("]");
+                }
+                else if (expr.kind === 95) {
+                    target = expr;
+                    write("_super");
+                }
+                else {
+                    emit(node.expression);
+                }
+                write(".apply(");
+                if (target) {
+                    if (target.kind === 95) {
+                        emitThis(target);
+                    }
+                    else {
+                        emit(target);
+                    }
+                }
+                else {
+                    write("void 0");
+                }
+                write(", ");
+                emitListWithSpread(node.arguments, false, false, false, true);
+                write(")");
+            }
+            function isInAsyncMethodWithSuperInES6(node) {
+                if (languageVersion === 2) {
+                    var container = ts.getSuperContainer(node, false);
+                    if (container && resolver.getNodeCheckFlags(container) & (2048 | 4096)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function emitSuperAccessInAsyncMethod(superNode, argumentExpression) {
+                var container = ts.getSuperContainer(superNode, false);
+                var isSuperBinding = resolver.getNodeCheckFlags(container) & 4096;
+                write("_super(");
+                emit(argumentExpression);
+                write(isSuperBinding ? ").value" : ")");
+            }
+            function emitCallExpression(node) {
+                if (languageVersion < 2 && hasSpreadElement(node.arguments)) {
+                    emitCallWithSpread(node);
+                    return;
+                }
+                var expression = node.expression;
+                var superCall = false;
+                var isAsyncMethodWithSuper = false;
+                if (expression.kind === 95) {
+                    emitSuper(expression);
+                    superCall = true;
+                }
+                else {
+                    superCall = ts.isSuperPropertyOrElementAccess(expression);
+                    isAsyncMethodWithSuper = superCall && isInAsyncMethodWithSuperInES6(node);
+                    emit(expression);
+                }
+                if (superCall && (languageVersion < 2 || isAsyncMethodWithSuper)) {
+                    write(".call(");
+                    emitThis(expression);
+                    if (node.arguments.length) {
+                        write(", ");
+                        emitCommaList(node.arguments);
+                    }
+                    write(")");
+                }
+                else {
+                    write("(");
+                    emitCommaList(node.arguments);
+                    write(")");
+                }
+            }
+            function emitNewExpression(node) {
+                write("new ");
+                if (languageVersion === 1 &&
+                    node.arguments &&
+                    hasSpreadElement(node.arguments)) {
+                    write("(");
+                    var target = emitCallTarget(node.expression);
+                    write(".bind.apply(");
+                    emit(target);
+                    write(", [void 0].concat(");
+                    emitListWithSpread(node.arguments, false, false, false, false);
+                    write(")))");
+                    write("()");
+                }
+                else {
+                    emit(node.expression);
+                    if (node.arguments) {
+                        write("(");
+                        emitCommaList(node.arguments);
+                        write(")");
+                    }
+                }
+            }
+            function emitTaggedTemplateExpression(node) {
+                if (languageVersion >= 2) {
+                    emit(node.tag);
+                    write(" ");
+                    emit(node.template);
+                }
+                else {
+                    emitDownlevelTaggedTemplate(node);
+                }
+            }
+            function emitParenExpression(node) {
+                if (!ts.nodeIsSynthesized(node) && node.parent.kind !== 180) {
+                    if (node.expression.kind === 177 ||
+                        node.expression.kind === 195 ||
+                        node.expression.kind === 196) {
+                        var operand = node.expression.expression;
+                        while (operand.kind === 177 ||
+                            operand.kind === 195 ||
+                            operand.kind === 196) {
+                            operand = operand.expression;
+                        }
+                        if (operand.kind !== 185 &&
+                            operand.kind !== 183 &&
+                            operand.kind !== 182 &&
+                            operand.kind !== 181 &&
+                            operand.kind !== 186 &&
+                            operand.kind !== 175 &&
+                            !(operand.kind === 174 && node.parent.kind === 175) &&
+                            !(operand.kind === 179 && node.parent.kind === 174) &&
+                            !(operand.kind === 8 && node.parent.kind === 172)) {
+                            emit(operand);
+                            return;
+                        }
+                    }
+                }
+                write("(");
+                emit(node.expression);
+                write(")");
+            }
+            function emitDeleteExpression(node) {
+                write(ts.tokenToString(78));
+                write(" ");
+                emit(node.expression);
+            }
+            function emitVoidExpression(node) {
+                write(ts.tokenToString(103));
+                write(" ");
+                emit(node.expression);
+            }
+            function emitTypeOfExpression(node) {
+                write(ts.tokenToString(101));
+                write(" ");
+                emit(node.expression);
+            }
+            function isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node) {
+                if (!isCurrentFileSystemExternalModule() || node.kind !== 69 || ts.nodeIsSynthesized(node)) {
+                    return false;
+                }
+                var isVariableDeclarationOrBindingElement = node.parent && (node.parent.kind === 218 || node.parent.kind === 169);
+                var targetDeclaration = isVariableDeclarationOrBindingElement
+                    ? node.parent
+                    : resolver.getReferencedValueDeclaration(node);
+                return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, true);
+            }
+            function isNameOfExportedDeclarationInNonES6Module(node) {
+                if (modulekind === ts.ModuleKind.System || node.kind !== 69 || ts.nodeIsSynthesized(node)) {
+                    return false;
+                }
+                return !exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, node.text);
+            }
+            function emitPrefixUnaryExpression(node) {
+                var isPlusPlusOrMinusMinus = (node.operator === 41
+                    || node.operator === 42);
+                var externalExportChanged = isPlusPlusOrMinusMinus &&
+                    isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
+                if (externalExportChanged) {
+                    write(exportFunctionForFile + "(\"");
+                    emitNodeWithoutSourceMap(node.operand);
+                    write("\", ");
+                }
+                var internalExportChanged = isPlusPlusOrMinusMinus &&
+                    isNameOfExportedDeclarationInNonES6Module(node.operand);
+                if (internalExportChanged) {
+                    emitAliasEqual(node.operand);
+                }
+                write(ts.tokenToString(node.operator));
+                if (node.operand.kind === 185) {
+                    var operand = node.operand;
+                    if (node.operator === 35 && (operand.operator === 35 || operand.operator === 41)) {
+                        write(" ");
+                    }
+                    else if (node.operator === 36 && (operand.operator === 36 || operand.operator === 42)) {
+                        write(" ");
+                    }
+                }
+                emit(node.operand);
+                if (externalExportChanged) {
+                    write(")");
+                }
+            }
+            function emitPostfixUnaryExpression(node) {
+                var externalExportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
+                var internalExportChanged = isNameOfExportedDeclarationInNonES6Module(node.operand);
+                if (externalExportChanged) {
+                    write("(" + exportFunctionForFile + "(\"");
+                    emitNodeWithoutSourceMap(node.operand);
+                    write("\", ");
+                    write(ts.tokenToString(node.operator));
+                    emit(node.operand);
+                    if (node.operator === 41) {
+                        write(") - 1)");
+                    }
+                    else {
+                        write(") + 1)");
+                    }
+                }
+                else if (internalExportChanged) {
+                    emitAliasEqual(node.operand);
+                    emit(node.operand);
+                    if (node.operator === 41) {
+                        write(" += 1");
+                    }
+                    else {
+                        write(" -= 1");
+                    }
+                }
+                else {
+                    emit(node.operand);
+                    write(ts.tokenToString(node.operator));
+                }
+            }
+            function shouldHoistDeclarationInSystemJsModule(node) {
+                return isSourceFileLevelDeclarationInSystemJsModule(node, false);
+            }
+            function isSourceFileLevelDeclarationInSystemJsModule(node, isExported) {
+                if (!node || !isCurrentFileSystemExternalModule()) {
+                    return false;
+                }
+                var current = ts.getRootDeclaration(node).parent;
+                while (current) {
+                    if (current.kind === 256) {
+                        return !isExported || ((ts.getCombinedNodeFlags(node) & 1) !== 0);
+                    }
+                    else if (ts.isDeclaration(current)) {
+                        return false;
+                    }
+                    else {
+                        current = current.parent;
+                    }
+                }
+            }
+            function emitExponentiationOperator(node) {
+                var leftHandSideExpression = node.left;
+                if (node.operatorToken.kind === 60) {
+                    var synthesizedLHS = void 0;
+                    var shouldEmitParentheses = false;
+                    if (ts.isElementAccessExpression(leftHandSideExpression)) {
+                        shouldEmitParentheses = true;
+                        write("(");
+                        synthesizedLHS = ts.createSynthesizedNode(173, false);
+                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, false, false);
+                        synthesizedLHS.expression = identifier;
+                        if (leftHandSideExpression.argumentExpression.kind !== 8 &&
+                            leftHandSideExpression.argumentExpression.kind !== 9) {
+                            var tempArgumentExpression = createAndRecordTempVariable(268435456);
+                            synthesizedLHS.argumentExpression = tempArgumentExpression;
+                            emitAssignment(tempArgumentExpression, leftHandSideExpression.argumentExpression, true, leftHandSideExpression.expression);
+                        }
+                        else {
+                            synthesizedLHS.argumentExpression = leftHandSideExpression.argumentExpression;
+                        }
+                        write(", ");
+                    }
+                    else if (ts.isPropertyAccessExpression(leftHandSideExpression)) {
+                        shouldEmitParentheses = true;
+                        write("(");
+                        synthesizedLHS = ts.createSynthesizedNode(172, false);
+                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, false, false);
+                        synthesizedLHS.expression = identifier;
+                        synthesizedLHS.dotToken = leftHandSideExpression.dotToken;
+                        synthesizedLHS.name = leftHandSideExpression.name;
+                        write(", ");
+                    }
+                    emit(synthesizedLHS || leftHandSideExpression);
+                    write(" = ");
+                    write("Math.pow(");
+                    emit(synthesizedLHS || leftHandSideExpression);
+                    write(", ");
+                    emit(node.right);
+                    write(")");
+                    if (shouldEmitParentheses) {
+                        write(")");
+                    }
+                }
+                else {
+                    write("Math.pow(");
+                    emit(leftHandSideExpression);
+                    write(", ");
+                    emit(node.right);
+                    write(")");
+                }
+            }
+            function emitAliasEqual(name) {
+                for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
+                    var specifier = _b[_a];
+                    emitStart(specifier.name);
+                    emitContainingModuleName(specifier);
+                    if (languageVersion === 0 && name.text === "default") {
+                        write('["default"]');
+                    }
+                    else {
+                        write(".");
+                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                    }
+                    emitEnd(specifier.name);
+                    write(" = ");
+                }
+                return true;
+            }
+            function emitBinaryExpression(node) {
+                if (languageVersion < 2 && node.operatorToken.kind === 56 &&
+                    (node.left.kind === 171 || node.left.kind === 170)) {
+                    emitDestructuring(node, node.parent.kind === 202);
+                }
+                else {
+                    var isAssignment = ts.isAssignmentOperator(node.operatorToken.kind);
+                    var externalExportChanged = isAssignment &&
+                        isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left);
+                    if (externalExportChanged) {
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithoutSourceMap(node.left);
+                        write("\", ");
+                    }
+                    var internalExportChanged = isAssignment &&
+                        isNameOfExportedDeclarationInNonES6Module(node.left);
+                    if (internalExportChanged) {
+                        emitAliasEqual(node.left);
+                    }
+                    if (node.operatorToken.kind === 38 || node.operatorToken.kind === 60) {
+                        emitExponentiationOperator(node);
+                    }
+                    else {
+                        emit(node.left);
+                        var indentedBeforeOperator = indentIfOnDifferentLines(node, node.left, node.operatorToken, node.operatorToken.kind !== 24 ? " " : undefined);
+                        write(ts.tokenToString(node.operatorToken.kind));
+                        var indentedAfterOperator = indentIfOnDifferentLines(node, node.operatorToken, node.right, " ");
+                        emit(node.right);
+                        decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator);
+                    }
+                    if (externalExportChanged) {
+                        write(")");
+                    }
+                }
+            }
+            function synthesizedNodeStartsOnNewLine(node) {
+                return ts.nodeIsSynthesized(node) && node.startsOnNewLine;
+            }
+            function emitConditionalExpression(node) {
+                emit(node.condition);
+                var indentedBeforeQuestion = indentIfOnDifferentLines(node, node.condition, node.questionToken, " ");
+                write("?");
+                var indentedAfterQuestion = indentIfOnDifferentLines(node, node.questionToken, node.whenTrue, " ");
+                emit(node.whenTrue);
+                decreaseIndentIf(indentedBeforeQuestion, indentedAfterQuestion);
+                var indentedBeforeColon = indentIfOnDifferentLines(node, node.whenTrue, node.colonToken, " ");
+                write(":");
+                var indentedAfterColon = indentIfOnDifferentLines(node, node.colonToken, node.whenFalse, " ");
+                emit(node.whenFalse);
+                decreaseIndentIf(indentedBeforeColon, indentedAfterColon);
+            }
+            function decreaseIndentIf(value1, value2) {
+                if (value1) {
+                    decreaseIndent();
+                }
+                if (value2) {
+                    decreaseIndent();
+                }
+            }
+            function isSingleLineEmptyBlock(node) {
+                if (node && node.kind === 199) {
+                    var block = node;
+                    return block.statements.length === 0 && nodeEndIsOnSameLineAsNodeStart(block, block);
+                }
+            }
+            function emitBlock(node) {
+                if (isSingleLineEmptyBlock(node)) {
+                    emitToken(15, node.pos);
+                    write(" ");
+                    emitToken(16, node.statements.end);
+                    return;
+                }
+                emitToken(15, node.pos);
+                increaseIndent();
+                if (node.kind === 226) {
+                    ts.Debug.assert(node.parent.kind === 225);
+                    emitCaptureThisForNodeIfNecessary(node.parent);
+                }
+                emitLines(node.statements);
+                if (node.kind === 226) {
+                    emitTempDeclarations(true);
+                }
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.statements.end);
+            }
+            function emitEmbeddedStatement(node) {
+                if (node.kind === 199) {
+                    write(" ");
+                    emit(node);
+                }
+                else {
+                    increaseIndent();
+                    writeLine();
+                    emit(node);
+                    decreaseIndent();
+                }
+            }
+            function emitExpressionStatement(node) {
+                emitParenthesizedIf(node.expression, node.expression.kind === 180);
+                write(";");
+            }
+            function emitIfStatement(node) {
+                var endPos = emitToken(88, node.pos);
+                write(" ");
+                endPos = emitToken(17, endPos);
+                emit(node.expression);
+                emitToken(18, node.expression.end);
+                emitEmbeddedStatement(node.thenStatement);
+                if (node.elseStatement) {
+                    writeLine();
+                    emitToken(80, node.thenStatement.end);
+                    if (node.elseStatement.kind === 203) {
+                        write(" ");
+                        emit(node.elseStatement);
+                    }
+                    else {
+                        emitEmbeddedStatement(node.elseStatement);
+                    }
+                }
+            }
+            function emitDoStatement(node) {
+                emitLoop(node, emitDoStatementWorker);
+            }
+            function emitDoStatementWorker(node, loop) {
+                write("do");
+                if (loop) {
+                    emitConvertedLoopCall(loop, true);
+                }
+                else {
+                    emitNormalLoopBody(node, true);
+                }
+                if (node.statement.kind === 199) {
+                    write(" ");
+                }
+                else {
+                    writeLine();
+                }
+                write("while (");
+                emit(node.expression);
+                write(");");
+            }
+            function emitWhileStatement(node) {
+                emitLoop(node, emitWhileStatementWorker);
+            }
+            function emitWhileStatementWorker(node, loop) {
+                write("while (");
+                emit(node.expression);
+                write(")");
+                if (loop) {
+                    emitConvertedLoopCall(loop, true);
+                }
+                else {
+                    emitNormalLoopBody(node, true);
+                }
+            }
+            function tryEmitStartOfVariableDeclarationList(decl) {
+                if (shouldHoistVariable(decl, true)) {
+                    return false;
+                }
+                if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072) === 0) {
+                    for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) {
+                        var varDecl = _b[_a];
+                        hoistVariableDeclarationFromLoop(convertedLoopState, varDecl);
+                    }
+                    return false;
+                }
+                emitStart(decl);
+                if (decl && languageVersion >= 2) {
+                    if (ts.isLet(decl)) {
+                        write("let ");
+                    }
+                    else if (ts.isConst(decl)) {
+                        write("const ");
+                    }
+                    else {
+                        write("var ");
+                    }
+                }
+                else {
+                    write("var ");
+                }
+                return true;
+            }
+            function emitVariableDeclarationListSkippingUninitializedEntries(list) {
+                var started = false;
+                for (var _a = 0, _b = list.declarations; _a < _b.length; _a++) {
+                    var decl = _b[_a];
+                    if (!decl.initializer) {
+                        continue;
+                    }
+                    if (!started) {
+                        started = true;
+                    }
+                    else {
+                        write(", ");
+                    }
+                    emit(decl);
+                }
+                return started;
+            }
+            function shouldConvertLoopBody(node) {
+                return languageVersion < 2 &&
+                    (resolver.getNodeCheckFlags(node) & 65536) !== 0;
+            }
+            function emitLoop(node, loopEmitter) {
+                var shouldConvert = shouldConvertLoopBody(node);
+                if (!shouldConvert) {
+                    loopEmitter(node, undefined);
+                }
+                else {
+                    var loop = convertLoopBody(node);
+                    if (node.parent.kind === 214) {
+                        emitLabelAndColon(node.parent);
+                    }
+                    loopEmitter(node, loop);
+                }
+            }
+            function convertLoopBody(node) {
+                var functionName = makeUniqueName("_loop");
+                var loopInitializer;
+                switch (node.kind) {
+                    case 206:
+                    case 207:
+                    case 208:
+                        var initializer = node.initializer;
+                        if (initializer && initializer.kind === 219) {
+                            loopInitializer = node.initializer;
+                        }
+                        break;
+                }
+                var loopParameters;
+                var loopOutParameters;
+                if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3072)) {
+                    loopParameters = [];
+                    for (var _a = 0, _b = loopInitializer.declarations; _a < _b.length; _a++) {
+                        var varDeclaration = _b[_a];
+                        processVariableDeclaration(varDeclaration.name);
+                    }
+                }
+                var bodyIsBlock = node.statement.kind === 199;
+                var paramList = loopParameters ? loopParameters.join(", ") : "";
+                writeLine();
+                write("var " + functionName + " = function(" + paramList + ")");
+                var convertedOuterLoopState = convertedLoopState;
+                convertedLoopState = { loopOutParameters: loopOutParameters };
+                if (convertedOuterLoopState) {
+                    if (convertedOuterLoopState.argumentsName) {
+                        convertedLoopState.argumentsName = convertedOuterLoopState.argumentsName;
+                    }
+                    if (convertedOuterLoopState.thisName) {
+                        convertedLoopState.thisName = convertedOuterLoopState.thisName;
+                    }
+                    if (convertedOuterLoopState.hoistedLocalVariables) {
+                        convertedLoopState.hoistedLocalVariables = convertedOuterLoopState.hoistedLocalVariables;
+                    }
+                }
+                write(" {");
+                writeLine();
+                increaseIndent();
+                if (bodyIsBlock) {
+                    emitLines(node.statement.statements);
+                }
+                else {
+                    emit(node.statement);
+                }
+                writeLine();
+                copyLoopOutParameters(convertedLoopState, 1, true);
+                decreaseIndent();
+                writeLine();
+                write("};");
+                writeLine();
+                if (loopOutParameters) {
+                    write("var ");
+                    for (var i = 0; i < loopOutParameters.length; i++) {
+                        if (i !== 0) {
+                            write(", ");
+                        }
+                        write(loopOutParameters[i].outParamName);
+                    }
+                    write(";");
+                    writeLine();
+                }
+                if (convertedLoopState.argumentsName) {
+                    if (convertedOuterLoopState) {
+                        convertedOuterLoopState.argumentsName = convertedLoopState.argumentsName;
+                    }
+                    else {
+                        write("var " + convertedLoopState.argumentsName + " = arguments;");
+                        writeLine();
+                    }
+                }
+                if (convertedLoopState.thisName) {
+                    if (convertedOuterLoopState) {
+                        convertedOuterLoopState.thisName = convertedLoopState.thisName;
+                    }
+                    else {
+                        write("var " + convertedLoopState.thisName + " = this;");
+                        writeLine();
+                    }
+                }
+                if (convertedLoopState.hoistedLocalVariables) {
+                    if (convertedOuterLoopState) {
+                        convertedOuterLoopState.hoistedLocalVariables = convertedLoopState.hoistedLocalVariables;
+                    }
+                    else {
+                        write("var ");
+                        var seen = void 0;
+                        for (var _c = 0, _d = convertedLoopState.hoistedLocalVariables; _c < _d.length; _c++) {
+                            var id = _d[_c];
+                            if (!seen) {
+                                seen = {};
+                            }
+                            else {
+                                write(", ");
+                            }
+                            if (!ts.hasProperty(seen, id.text)) {
+                                emit(id);
+                                seen[id.text] = id.text;
+                            }
+                        }
+                        write(";");
+                        writeLine();
+                    }
+                }
+                var currentLoopState = convertedLoopState;
+                convertedLoopState = convertedOuterLoopState;
+                return { functionName: functionName, paramList: paramList, state: currentLoopState };
+                function processVariableDeclaration(name) {
+                    if (name.kind === 69) {
+                        var nameText = isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(name)
+                            ? getGeneratedNameForNode(name)
+                            : name.text;
+                        loopParameters.push(nameText);
+                        if (resolver.getNodeCheckFlags(name.parent) & 2097152) {
+                            var reassignedVariable = { originalName: name, outParamName: makeUniqueName("out_" + nameText) };
+                            (loopOutParameters || (loopOutParameters = [])).push(reassignedVariable);
+                        }
+                    }
+                    else {
+                        for (var _a = 0, _b = name.elements; _a < _b.length; _a++) {
+                            var element = _b[_a];
+                            processVariableDeclaration(element.name);
+                        }
+                    }
+                }
+            }
+            function emitNormalLoopBody(node, emitAsEmbeddedStatement) {
+                var saveAllowedNonLabeledJumps;
+                if (convertedLoopState) {
+                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                    convertedLoopState.allowedNonLabeledJumps = 2 | 4;
+                }
+                if (emitAsEmbeddedStatement) {
+                    emitEmbeddedStatement(node.statement);
+                }
+                else if (node.statement.kind === 199) {
+                    emitLines(node.statement.statements);
+                }
+                else {
+                    writeLine();
+                    emit(node.statement);
+                }
+                if (convertedLoopState) {
+                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
+                }
+            }
+            function copyLoopOutParameters(state, copyDirection, emitAsStatements) {
+                if (state.loopOutParameters) {
+                    for (var _a = 0, _b = state.loopOutParameters; _a < _b.length; _a++) {
+                        var outParam = _b[_a];
+                        if (copyDirection === 0) {
+                            emitIdentifier(outParam.originalName);
+                            write(" = " + outParam.outParamName);
+                        }
+                        else {
+                            write(outParam.outParamName + " = ");
+                            emitIdentifier(outParam.originalName);
+                        }
+                        if (emitAsStatements) {
+                            write(";");
+                            writeLine();
+                        }
+                        else {
+                            write(", ");
+                        }
+                    }
+                }
+            }
+            function emitConvertedLoopCall(loop, emitAsBlock) {
+                if (emitAsBlock) {
+                    write(" {");
+                    writeLine();
+                    increaseIndent();
+                }
+                var isSimpleLoop = !(loop.state.nonLocalJumps & ~4) &&
+                    !loop.state.labeledNonLocalBreaks &&
+                    !loop.state.labeledNonLocalContinues;
+                var loopResult = makeUniqueName("state");
+                if (!isSimpleLoop) {
+                    write("var " + loopResult + " = ");
+                }
+                write(loop.functionName + "(" + loop.paramList + ");");
+                writeLine();
+                copyLoopOutParameters(loop.state, 0, true);
+                if (!isSimpleLoop) {
+                    writeLine();
+                    if (loop.state.nonLocalJumps & 8) {
+                        write("if (typeof " + loopResult + " === \"object\") ");
+                        if (convertedLoopState) {
+                            write("return " + loopResult + ";");
+                            convertedLoopState.nonLocalJumps |= 8;
+                        }
+                        else {
+                            write("return " + loopResult + ".value;");
+                        }
+                        writeLine();
+                    }
+                    if (loop.state.nonLocalJumps & 2) {
+                        write("if (" + loopResult + " === \"break\") break;");
+                        writeLine();
+                    }
+                    emitDispatchTableForLabeledJumps(loopResult, loop.state, convertedLoopState);
+                }
+                if (emitAsBlock) {
+                    writeLine();
+                    decreaseIndent();
+                    write("}");
+                }
+                function emitDispatchTableForLabeledJumps(loopResultVariable, currentLoop, outerLoop) {
+                    if (!currentLoop.labeledNonLocalBreaks && !currentLoop.labeledNonLocalContinues) {
+                        return;
+                    }
+                    write("switch(" + loopResultVariable + ") {");
+                    increaseIndent();
+                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalBreaks, true, loopResultVariable, outerLoop);
+                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalContinues, false, loopResultVariable, outerLoop);
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+                function emitDispatchEntriesForLabeledJumps(table, isBreak, loopResultVariable, outerLoop) {
+                    if (!table) {
+                        return;
+                    }
+                    for (var labelText in table) {
+                        var labelMarker = table[labelText];
+                        writeLine();
+                        write("case \"" + labelMarker + "\": ");
+                        if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) {
+                            if (isBreak) {
+                                write("break ");
+                            }
+                            else {
+                                write("continue ");
+                            }
+                            write(labelText + ";");
+                        }
+                        else {
+                            setLabeledJump(outerLoop, isBreak, labelText, labelMarker);
+                            write("return " + loopResultVariable + ";");
+                        }
+                    }
+                }
+            }
+            function emitForStatement(node) {
+                emitLoop(node, emitForStatementWorker);
+            }
+            function emitForStatementWorker(node, loop) {
+                var endPos = emitToken(86, node.pos);
+                write(" ");
+                endPos = emitToken(17, endPos);
+                if (node.initializer && node.initializer.kind === 219) {
+                    var variableDeclarationList = node.initializer;
+                    var startIsEmitted = tryEmitStartOfVariableDeclarationList(variableDeclarationList);
+                    if (startIsEmitted) {
+                        emitCommaList(variableDeclarationList.declarations);
+                    }
+                    else {
+                        emitVariableDeclarationListSkippingUninitializedEntries(variableDeclarationList);
+                    }
+                }
+                else if (node.initializer) {
+                    emit(node.initializer);
+                }
+                write(";");
+                emitOptional(" ", node.condition);
+                write(";");
+                emitOptional(" ", node.incrementor);
+                write(")");
+                if (loop) {
+                    emitConvertedLoopCall(loop, true);
+                }
+                else {
+                    emitNormalLoopBody(node, true);
+                }
+            }
+            function emitForInOrForOfStatement(node) {
+                if (languageVersion < 2 && node.kind === 208) {
+                    emitLoop(node, emitDownLevelForOfStatementWorker);
+                }
+                else {
+                    emitLoop(node, emitForInOrForOfStatementWorker);
+                }
+            }
+            function emitForInOrForOfStatementWorker(node, loop) {
+                var endPos = emitToken(86, node.pos);
+                write(" ");
+                endPos = emitToken(17, endPos);
+                if (node.initializer.kind === 219) {
+                    var variableDeclarationList = node.initializer;
+                    if (variableDeclarationList.declarations.length >= 1) {
+                        tryEmitStartOfVariableDeclarationList(variableDeclarationList);
+                        emit(variableDeclarationList.declarations[0]);
+                    }
+                }
+                else {
+                    emit(node.initializer);
+                }
+                if (node.kind === 207) {
+                    write(" in ");
+                }
+                else {
+                    write(" of ");
+                }
+                emit(node.expression);
+                emitToken(18, node.expression.end);
+                if (loop) {
+                    emitConvertedLoopCall(loop, true);
+                }
+                else {
+                    emitNormalLoopBody(node, true);
+                }
+            }
+            function emitDownLevelForOfStatementWorker(node, loop) {
+                var endPos = emitToken(86, node.pos);
+                write(" ");
+                endPos = emitToken(17, endPos);
+                var counter = createTempVariable(268435456);
+                var rhsReference = ts.createSynthesizedNode(69);
+                rhsReference.text = node.expression.kind === 69 ?
+                    makeUniqueName(node.expression.text) :
+                    makeTempVariableName(0);
+                emitStart(node.expression);
+                write("var ");
+                emitNodeWithoutSourceMap(counter);
+                write(" = 0");
+                emitEnd(node.expression);
+                write(", ");
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(rhsReference);
+                write(" = ");
+                emitNodeWithoutSourceMap(node.expression);
+                emitEnd(node.expression);
+                write("; ");
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(counter);
+                write(" < ");
+                emitNodeWithCommentsAndWithoutSourcemap(rhsReference);
+                write(".length");
+                emitEnd(node.expression);
+                write("; ");
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(counter);
+                write("++");
+                emitEnd(node.expression);
+                emitToken(18, node.expression.end);
+                write(" {");
+                writeLine();
+                increaseIndent();
+                var rhsIterationValue = createElementAccessExpression(rhsReference, counter);
+                emitStart(node.initializer);
+                if (node.initializer.kind === 219) {
+                    write("var ");
+                    var variableDeclarationList = node.initializer;
+                    if (variableDeclarationList.declarations.length > 0) {
+                        var declaration = variableDeclarationList.declarations[0];
+                        if (ts.isBindingPattern(declaration.name)) {
+                            emitDestructuring(declaration, false, rhsIterationValue);
+                        }
+                        else {
+                            emitNodeWithCommentsAndWithoutSourcemap(declaration);
+                            write(" = ");
+                            emitNodeWithoutSourceMap(rhsIterationValue);
+                        }
+                    }
+                    else {
+                        emitNodeWithoutSourceMap(createTempVariable(0));
+                        write(" = ");
+                        emitNodeWithoutSourceMap(rhsIterationValue);
+                    }
+                }
+                else {
+                    var assignmentExpression = createBinaryExpression(node.initializer, 56, rhsIterationValue, false);
+                    if (node.initializer.kind === 170 || node.initializer.kind === 171) {
+                        emitDestructuring(assignmentExpression, true, undefined);
+                    }
+                    else {
+                        emitNodeWithCommentsAndWithoutSourcemap(assignmentExpression);
+                    }
+                }
+                emitEnd(node.initializer);
+                write(";");
+                if (loop) {
+                    writeLine();
+                    emitConvertedLoopCall(loop, false);
+                }
+                else {
+                    emitNormalLoopBody(node, false);
+                }
+                writeLine();
+                decreaseIndent();
+                write("}");
+            }
+            function emitBreakOrContinueStatement(node) {
+                if (convertedLoopState) {
+                    var jump = node.kind === 210 ? 2 : 4;
+                    var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) ||
+                        (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
+                    if (!canUseBreakOrContinue) {
+                        write("return ");
+                        copyLoopOutParameters(convertedLoopState, 1, false);
+                        if (!node.label) {
+                            if (node.kind === 210) {
+                                convertedLoopState.nonLocalJumps |= 2;
+                                write("\"break\";");
+                            }
+                            else {
+                                convertedLoopState.nonLocalJumps |= 4;
+                                write("\"continue\";");
+                            }
+                        }
+                        else {
+                            var labelMarker = void 0;
+                            if (node.kind === 210) {
+                                labelMarker = "break-" + node.label.text;
+                                setLabeledJump(convertedLoopState, true, node.label.text, labelMarker);
+                            }
+                            else {
+                                labelMarker = "continue-" + node.label.text;
+                                setLabeledJump(convertedLoopState, false, node.label.text, labelMarker);
+                            }
+                            write("\"" + labelMarker + "\";");
+                        }
+                        return;
+                    }
+                }
+                emitToken(node.kind === 210 ? 70 : 75, node.pos);
+                emitOptional(" ", node.label);
+                write(";");
+            }
+            function emitReturnStatement(node) {
+                if (convertedLoopState) {
+                    convertedLoopState.nonLocalJumps |= 8;
+                    write("return { value: ");
+                    if (node.expression) {
+                        emit(node.expression);
+                    }
+                    else {
+                        write("void 0");
+                    }
+                    write(" };");
+                    return;
+                }
+                emitToken(94, node.pos);
+                emitOptional(" ", node.expression);
+                write(";");
+            }
+            function emitWithStatement(node) {
+                write("with (");
+                emit(node.expression);
+                write(")");
+                emitEmbeddedStatement(node.statement);
+            }
+            function emitSwitchStatement(node) {
+                var endPos = emitToken(96, node.pos);
+                write(" ");
+                emitToken(17, endPos);
+                emit(node.expression);
+                endPos = emitToken(18, node.expression.end);
+                write(" ");
+                var saveAllowedNonLabeledJumps;
+                if (convertedLoopState) {
+                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                    convertedLoopState.allowedNonLabeledJumps |= 2;
+                }
+                emitCaseBlock(node.caseBlock, endPos);
+                if (convertedLoopState) {
+                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
+                }
+            }
+            function emitCaseBlock(node, startPos) {
+                emitToken(15, startPos);
+                increaseIndent();
+                emitLines(node.clauses);
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.clauses.end);
+            }
+            function nodeStartPositionsAreOnSameLine(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node1.pos)) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
+            }
+            function nodeEndPositionsAreOnSameLine(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, node2.end);
+            }
+            function nodeEndIsOnSameLineAsNodeStart(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
+            }
+            function emitCaseOrDefaultClause(node) {
+                if (node.kind === 249) {
+                    write("case ");
+                    emit(node.expression);
+                    write(":");
+                }
+                else {
+                    write("default:");
+                }
+                if (node.statements.length === 1 && nodeStartPositionsAreOnSameLine(node, node.statements[0])) {
+                    write(" ");
+                    emit(node.statements[0]);
+                }
+                else {
+                    increaseIndent();
+                    emitLines(node.statements);
+                    decreaseIndent();
+                }
+            }
+            function emitThrowStatement(node) {
+                write("throw ");
+                emit(node.expression);
+                write(";");
+            }
+            function emitTryStatement(node) {
+                write("try ");
+                emit(node.tryBlock);
+                emit(node.catchClause);
+                if (node.finallyBlock) {
+                    writeLine();
+                    write("finally ");
+                    emit(node.finallyBlock);
+                }
+            }
+            function emitCatchClause(node) {
+                writeLine();
+                var endPos = emitToken(72, node.pos);
+                write(" ");
+                emitToken(17, endPos);
+                emit(node.variableDeclaration);
+                emitToken(18, node.variableDeclaration ? node.variableDeclaration.end : endPos);
+                write(" ");
+                emitBlock(node.block);
+            }
+            function emitDebuggerStatement(node) {
+                emitToken(76, node.pos);
+                write(";");
+            }
+            function emitLabelAndColon(node) {
+                emit(node.label);
+                write(": ");
+            }
+            function emitLabeledStatement(node) {
+                if (!ts.isIterationStatement(node.statement, false) || !shouldConvertLoopBody(node.statement)) {
+                    emitLabelAndColon(node);
+                }
+                if (convertedLoopState) {
+                    if (!convertedLoopState.labels) {
+                        convertedLoopState.labels = {};
+                    }
+                    convertedLoopState.labels[node.label.text] = node.label.text;
+                }
+                emit(node.statement);
+                if (convertedLoopState) {
+                    convertedLoopState.labels[node.label.text] = undefined;
+                }
+            }
+            function getContainingModule(node) {
+                do {
+                    node = node.parent;
+                } while (node && node.kind !== 225);
+                return node;
+            }
+            function emitContainingModuleName(node) {
+                var container = getContainingModule(node);
+                write(container ? getGeneratedNameForNode(container) : "exports");
+            }
+            function emitModuleMemberName(node) {
+                emitStart(node.name);
+                if (ts.getCombinedNodeFlags(node) & 1) {
+                    var container = getContainingModule(node);
+                    if (container) {
+                        write(getGeneratedNameForNode(container));
+                        write(".");
+                    }
+                    else if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
+                        write("exports.");
+                    }
+                }
+                emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                emitEnd(node.name);
+            }
+            function createVoidZero() {
+                var zero = ts.createSynthesizedNode(8);
+                zero.text = "0";
+                var result = ts.createSynthesizedNode(183);
+                result.expression = zero;
+                return result;
+            }
+            function emitEs6ExportDefaultCompat(node) {
+                if (node.parent.kind === 256) {
+                    ts.Debug.assert(!!(node.flags & 512) || node.kind === 235);
+                    if (modulekind === ts.ModuleKind.CommonJS || modulekind === ts.ModuleKind.AMD || modulekind === ts.ModuleKind.UMD) {
+                        if (!isEs6Module) {
+                            if (languageVersion !== 0) {
+                                write('Object.defineProperty(exports, "__esModule", { value: true });');
+                                writeLine();
+                            }
+                            else {
+                                write("exports.__esModule = true;");
+                                writeLine();
+                            }
+                        }
+                    }
+                }
+            }
+            function emitExportMemberAssignment(node) {
+                if (node.flags & 1) {
+                    writeLine();
+                    emitStart(node);
+                    if (modulekind === ts.ModuleKind.System && node.parent === currentSourceFile) {
+                        write(exportFunctionForFile + "(\"");
+                        if (node.flags & 512) {
+                            write("default");
+                        }
+                        else {
+                            emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                        }
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(")");
+                    }
+                    else {
+                        if (node.flags & 512) {
+                            emitEs6ExportDefaultCompat(node);
+                            if (languageVersion === 0) {
+                                write('exports["default"]');
+                            }
+                            else {
+                                write("exports.default");
+                            }
+                        }
+                        else {
+                            emitModuleMemberName(node);
+                        }
+                        write(" = ");
+                        emitDeclarationName(node);
+                    }
+                    emitEnd(node);
+                    write(";");
+                }
+            }
+            function emitExportMemberAssignments(name) {
+                if (modulekind === ts.ModuleKind.System) {
+                    return;
+                }
+                if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
+                    for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
+                        var specifier = _b[_a];
+                        writeLine();
+                        emitStart(specifier.name);
+                        emitContainingModuleName(specifier);
+                        write(".");
+                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                        emitEnd(specifier.name);
+                        write(" = ");
+                        emitExpressionIdentifier(name);
+                        write(";");
+                    }
+                }
+            }
+            function emitExportSpecifierInSystemModule(specifier) {
+                ts.Debug.assert(modulekind === ts.ModuleKind.System);
+                if (!resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name) && !resolver.isValueAliasDeclaration(specifier)) {
+                    return;
+                }
+                writeLine();
+                emitStart(specifier.name);
+                write(exportFunctionForFile + "(\"");
+                emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                write("\", ");
+                emitExpressionIdentifier(specifier.propertyName || specifier.name);
+                write(")");
+                emitEnd(specifier.name);
+                write(";");
+            }
+            function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) {
+                if (shouldEmitCommaBeforeAssignment) {
+                    write(", ");
+                }
+                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name);
+                if (exportChanged) {
+                    write(exportFunctionForFile + "(\"");
+                    emitNodeWithCommentsAndWithoutSourcemap(name);
+                    write("\", ");
+                }
+                var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 || name.parent.kind === 169);
+                emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap);
+                withTemporaryNoSourceMap(function () {
+                    if (isVariableDeclarationOrBindingElement) {
+                        emitModuleMemberName(name.parent);
+                    }
+                    else {
+                        emit(name);
+                    }
+                    write(" = ");
+                    emit(value);
+                });
+                emitEnd(nodeForSourceMap, true);
+                if (exportChanged) {
+                    write(")");
+                }
+            }
+            function emitTempVariableAssignment(expression, canDefineTempVariablesInPlace, shouldEmitCommaBeforeAssignment, sourceMapNode) {
+                var identifier = createTempVariable(0);
+                if (!canDefineTempVariablesInPlace) {
+                    recordTempDeclaration(identifier);
+                }
+                emitAssignment(identifier, expression, shouldEmitCommaBeforeAssignment, sourceMapNode || expression.parent);
+                return identifier;
+            }
+            function isFirstVariableDeclaration(root) {
+                return root.kind === 218 &&
+                    root.parent.kind === 219 &&
+                    root.parent.declarations[0] === root;
+            }
+            function emitDestructuring(root, isAssignmentExpressionStatement, value) {
+                var emitCount = 0;
+                var canDefineTempVariablesInPlace = false;
+                if (root.kind === 218) {
+                    var isExported = ts.getCombinedNodeFlags(root) & 1;
+                    var isSourceLevelForSystemModuleKind = shouldHoistDeclarationInSystemJsModule(root);
+                    canDefineTempVariablesInPlace = !isExported && !isSourceLevelForSystemModuleKind;
+                }
+                else if (root.kind === 142) {
+                    canDefineTempVariablesInPlace = true;
+                }
+                if (root.kind === 187) {
+                    emitAssignmentExpression(root);
+                }
+                else {
+                    ts.Debug.assert(!isAssignmentExpressionStatement);
+                    if (isFirstVariableDeclaration(root)) {
+                        sourceMap.changeEmitSourcePos();
+                    }
+                    emitBindingElement(root, value);
+                }
+                function ensureIdentifier(expr, reuseIdentifierExpressions, sourceMapNode) {
+                    if (expr.kind === 69 && reuseIdentifierExpressions) {
+                        return expr;
+                    }
+                    var identifier = emitTempVariableAssignment(expr, canDefineTempVariablesInPlace, emitCount > 0, sourceMapNode);
+                    emitCount++;
+                    return identifier;
+                }
+                function createDefaultValueCheck(value, defaultValue, sourceMapNode) {
+                    value = ensureIdentifier(value, true, sourceMapNode);
+                    var equals = ts.createSynthesizedNode(187);
+                    equals.left = value;
+                    equals.operatorToken = ts.createSynthesizedNode(32);
+                    equals.right = createVoidZero();
+                    return createConditionalExpression(equals, defaultValue, value);
+                }
+                function createConditionalExpression(condition, whenTrue, whenFalse) {
+                    var cond = ts.createSynthesizedNode(188);
+                    cond.condition = condition;
+                    cond.questionToken = ts.createSynthesizedNode(53);
+                    cond.whenTrue = whenTrue;
+                    cond.colonToken = ts.createSynthesizedNode(54);
+                    cond.whenFalse = whenFalse;
+                    return cond;
+                }
+                function createNumericLiteral(value) {
+                    var node = ts.createSynthesizedNode(8);
+                    node.text = "" + value;
+                    return node;
+                }
+                function createPropertyAccessForDestructuringProperty(object, propName) {
+                    var index;
+                    var nameIsComputed = propName.kind === 140;
+                    if (nameIsComputed) {
+                        index = ensureIdentifier(propName.expression, false, propName);
+                    }
+                    else {
+                        index = ts.createSynthesizedNode(propName.kind);
+                        index.text = ts.unescapeIdentifier(propName.text);
+                    }
+                    return !nameIsComputed && index.kind === 69
+                        ? createPropertyAccessExpression(object, index)
+                        : createElementAccessExpression(object, index);
+                }
+                function createSliceCall(value, sliceIndex) {
+                    var call = ts.createSynthesizedNode(174);
+                    var sliceIdentifier = ts.createSynthesizedNode(69);
+                    sliceIdentifier.text = "slice";
+                    call.expression = createPropertyAccessExpression(value, sliceIdentifier);
+                    call.arguments = ts.createSynthesizedNodeArray();
+                    call.arguments[0] = createNumericLiteral(sliceIndex);
+                    return call;
+                }
+                function emitObjectLiteralAssignment(target, value, sourceMapNode) {
+                    var properties = target.properties;
+                    if (properties.length !== 1) {
+                        value = ensureIdentifier(value, true, sourceMapNode);
+                    }
+                    for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) {
+                        var p = properties_5[_a];
+                        if (p.kind === 253 || p.kind === 254) {
+                            var propName = p.name;
+                            var target_1 = p.kind === 254 ? p : p.initializer || propName;
+                            emitDestructuringAssignment(target_1, createPropertyAccessForDestructuringProperty(value, propName), p);
+                        }
+                    }
+                }
+                function emitArrayLiteralAssignment(target, value, sourceMapNode) {
+                    var elements = target.elements;
+                    if (elements.length !== 1) {
+                        value = ensureIdentifier(value, true, sourceMapNode);
+                    }
+                    for (var i = 0; i < elements.length; i++) {
+                        var e = elements[i];
+                        if (e.kind !== 193) {
+                            if (e.kind !== 191) {
+                                emitDestructuringAssignment(e, createElementAccessExpression(value, createNumericLiteral(i)), e);
+                            }
+                            else if (i === elements.length - 1) {
+                                emitDestructuringAssignment(e.expression, createSliceCall(value, i), e);
+                            }
+                        }
+                    }
+                }
+                function emitDestructuringAssignment(target, value, sourceMapNode) {
+                    if (target.kind === 254) {
+                        if (target.objectAssignmentInitializer) {
+                            value = createDefaultValueCheck(value, target.objectAssignmentInitializer, sourceMapNode);
+                        }
+                        target = target.name;
+                    }
+                    else if (target.kind === 187 && target.operatorToken.kind === 56) {
+                        value = createDefaultValueCheck(value, target.right, sourceMapNode);
+                        target = target.left;
+                    }
+                    if (target.kind === 171) {
+                        emitObjectLiteralAssignment(target, value, sourceMapNode);
+                    }
+                    else if (target.kind === 170) {
+                        emitArrayLiteralAssignment(target, value, sourceMapNode);
+                    }
+                    else {
+                        emitAssignment(target, value, emitCount > 0, sourceMapNode);
+                        emitCount++;
+                    }
+                }
+                function emitAssignmentExpression(root) {
+                    var target = root.left;
+                    var value = root.right;
+                    if (ts.isEmptyObjectLiteralOrArrayLiteral(target)) {
+                        emit(value);
+                    }
+                    else if (isAssignmentExpressionStatement) {
+                        emitDestructuringAssignment(target, value, ts.nodeIsSynthesized(root) ? target : root);
+                    }
+                    else {
+                        if (root.parent.kind !== 178) {
+                            write("(");
+                        }
+                        value = ensureIdentifier(value, true, root);
+                        emitDestructuringAssignment(target, value, root);
+                        write(", ");
+                        emit(value);
+                        if (root.parent.kind !== 178) {
+                            write(")");
+                        }
+                    }
+                }
+                function emitBindingElement(target, value) {
+                    if (target.initializer) {
+                        value = value ? createDefaultValueCheck(value, target.initializer, target) : target.initializer;
+                    }
+                    else if (!value) {
+                        value = createVoidZero();
+                    }
+                    if (ts.isBindingPattern(target.name)) {
+                        var pattern = target.name;
+                        var elements = pattern.elements;
+                        var numElements = elements.length;
+                        if (numElements !== 1) {
+                            value = ensureIdentifier(value, numElements !== 0, target);
+                        }
+                        for (var i = 0; i < numElements; i++) {
+                            var element = elements[i];
+                            if (pattern.kind === 167) {
+                                var propName = element.propertyName || element.name;
+                                emitBindingElement(element, createPropertyAccessForDestructuringProperty(value, propName));
+                            }
+                            else if (element.kind !== 193) {
+                                if (!element.dotDotDotToken) {
+                                    emitBindingElement(element, createElementAccessExpression(value, createNumericLiteral(i)));
+                                }
+                                else if (i === numElements - 1) {
+                                    emitBindingElement(element, createSliceCall(value, i));
+                                }
+                            }
+                        }
+                    }
+                    else {
+                        emitAssignment(target.name, value, emitCount > 0, target);
+                        emitCount++;
+                    }
+                }
+            }
+            function emitVariableDeclaration(node) {
+                if (ts.isBindingPattern(node.name)) {
+                    var isExported = ts.getCombinedNodeFlags(node) & 1;
+                    if (languageVersion >= 2 && (!isExported || modulekind === ts.ModuleKind.ES6)) {
+                        var isTopLevelDeclarationInSystemModule = modulekind === ts.ModuleKind.System &&
+                            shouldHoistVariable(node, true);
+                        if (isTopLevelDeclarationInSystemModule) {
+                            write("(");
+                        }
+                        emit(node.name);
+                        emitOptional(" = ", node.initializer);
+                        if (isTopLevelDeclarationInSystemModule) {
+                            write(")");
+                        }
+                    }
+                    else {
+                        emitDestructuring(node, false);
+                    }
+                }
+                else {
+                    var initializer = node.initializer;
+                    if (!initializer &&
+                        languageVersion < 2 &&
+                        node.name.kind === 69) {
+                        var container = ts.getEnclosingBlockScopeContainer(node);
+                        var flags = resolver.getNodeCheckFlags(node);
+                        var isCapturedInFunction = flags & 131072;
+                        var isDeclaredInLoop = flags & 262144;
+                        var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(container) ||
+                            (isCapturedInFunction && isDeclaredInLoop && container.kind === 199 && ts.isIterationStatement(container.parent, false));
+                        var emittedAsNestedLetDeclaration = ts.getCombinedNodeFlags(node) & 1024 &&
+                            !emittedAsTopLevel;
+                        var emitExplicitInitializer = emittedAsNestedLetDeclaration &&
+                            container.kind !== 207 &&
+                            container.kind !== 208 &&
+                            (!resolver.isDeclarationWithCollidingName(node) ||
+                                (isDeclaredInLoop && !isCapturedInFunction && !ts.isIterationStatement(container, false)));
+                        if (emitExplicitInitializer) {
+                            initializer = createVoidZero();
+                        }
+                    }
+                    var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.name);
+                    if (exportChanged) {
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                        write("\", ");
+                    }
+                    emitModuleMemberName(node);
+                    emitOptional(" = ", initializer);
+                    if (exportChanged) {
+                        write(")");
+                    }
+                }
+            }
+            function emitExportVariableAssignments(node) {
+                if (node.kind === 193) {
+                    return;
+                }
+                var name = node.name;
+                if (name.kind === 69) {
+                    emitExportMemberAssignments(name);
+                }
+                else if (ts.isBindingPattern(name)) {
+                    ts.forEach(name.elements, emitExportVariableAssignments);
+                }
+            }
+            function isES6ExportedDeclaration(node) {
+                return !!(node.flags & 1) &&
+                    modulekind === ts.ModuleKind.ES6 &&
+                    node.parent.kind === 256;
+            }
+            function emitVariableStatement(node) {
+                var startIsEmitted = false;
+                if (node.flags & 1) {
+                    if (isES6ExportedDeclaration(node)) {
+                        write("export ");
+                        startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
+                    }
+                }
+                else {
+                    startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
+                }
+                if (startIsEmitted) {
+                    emitCommaList(node.declarationList.declarations);
+                    write(";");
+                }
+                else {
+                    var atLeastOneItem = emitVariableDeclarationListSkippingUninitializedEntries(node.declarationList);
+                    if (atLeastOneItem) {
+                        write(";");
+                    }
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
+                    ts.forEach(node.declarationList.declarations, emitExportVariableAssignments);
+                }
+            }
+            function shouldEmitLeadingAndTrailingCommentsForVariableStatement(node) {
+                if (!(node.flags & 1)) {
+                    return true;
+                }
+                if (isES6ExportedDeclaration(node)) {
+                    return true;
+                }
+                for (var _a = 0, _b = node.declarationList.declarations; _a < _b.length; _a++) {
+                    var declaration = _b[_a];
+                    if (declaration.initializer) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function emitParameter(node) {
+                if (languageVersion < 2) {
+                    if (ts.isBindingPattern(node.name)) {
+                        var name_29 = createTempVariable(0);
+                        if (!tempParameters) {
+                            tempParameters = [];
+                        }
+                        tempParameters.push(name_29);
+                        emit(name_29);
+                    }
+                    else {
+                        emit(node.name);
+                    }
+                }
+                else {
+                    if (node.dotDotDotToken) {
+                        write("...");
+                    }
+                    emit(node.name);
+                    emitOptional(" = ", node.initializer);
+                }
+            }
+            function emitDefaultValueAssignments(node) {
+                if (languageVersion < 2) {
+                    var tempIndex_1 = 0;
+                    ts.forEach(node.parameters, function (parameter) {
+                        if (parameter.dotDotDotToken) {
+                            return;
+                        }
+                        var paramName = parameter.name, initializer = parameter.initializer;
+                        if (ts.isBindingPattern(paramName)) {
+                            var hasBindingElements = paramName.elements.length > 0;
+                            if (hasBindingElements || initializer) {
+                                writeLine();
+                                write("var ");
+                                if (hasBindingElements) {
+                                    emitDestructuring(parameter, false, tempParameters[tempIndex_1]);
+                                }
+                                else {
+                                    emit(tempParameters[tempIndex_1]);
+                                    write(" = ");
+                                    emit(initializer);
+                                }
+                                write(";");
+                                tempIndex_1++;
+                            }
+                        }
+                        else if (initializer) {
+                            writeLine();
+                            emitStart(parameter);
+                            write("if (");
+                            emitNodeWithoutSourceMap(paramName);
+                            write(" === void 0)");
+                            emitEnd(parameter);
+                            write(" { ");
+                            emitStart(parameter);
+                            emitNodeWithCommentsAndWithoutSourcemap(paramName);
+                            write(" = ");
+                            emitNodeWithCommentsAndWithoutSourcemap(initializer);
+                            emitEnd(parameter);
+                            write("; }");
+                        }
+                    });
+                }
+            }
+            function emitRestParameter(node) {
+                if (languageVersion < 2 && ts.hasDeclaredRestParameter(node)) {
+                    var restIndex = node.parameters.length - 1;
+                    var restParam = node.parameters[restIndex];
+                    if (ts.isBindingPattern(restParam.name)) {
+                        return;
+                    }
+                    var tempName = createTempVariable(268435456).text;
+                    writeLine();
+                    emitLeadingComments(restParam);
+                    emitStart(restParam);
+                    write("var ");
+                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
+                    write(" = [];");
+                    emitEnd(restParam);
+                    emitTrailingComments(restParam);
+                    writeLine();
+                    write("for (");
+                    emitStart(restParam);
+                    write("var " + tempName + " = " + restIndex + ";");
+                    emitEnd(restParam);
+                    write(" ");
+                    emitStart(restParam);
+                    write(tempName + " < arguments.length;");
+                    emitEnd(restParam);
+                    write(" ");
+                    emitStart(restParam);
+                    write(tempName + "++");
+                    emitEnd(restParam);
+                    write(") {");
+                    increaseIndent();
+                    writeLine();
+                    emitStart(restParam);
+                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
+                    write("[" + tempName + " - " + restIndex + "] = arguments[" + tempName + "];");
+                    emitEnd(restParam);
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function emitAccessor(node) {
+                write(node.kind === 149 ? "get " : "set ");
+                emit(node.name);
+                emitSignatureAndBody(node);
+            }
+            function shouldEmitAsArrowFunction(node) {
+                return node.kind === 180 && languageVersion >= 2;
+            }
+            function emitDeclarationName(node) {
+                if (node.name) {
+                    emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                }
+                else {
+                    write(getGeneratedNameForNode(node));
+                }
+            }
+            function shouldEmitFunctionName(node) {
+                if (node.kind === 179) {
+                    return !!node.name;
+                }
+                if (node.kind === 220) {
+                    return !!node.name || modulekind !== ts.ModuleKind.ES6;
+                }
+            }
+            function emitFunctionDeclaration(node) {
+                if (ts.nodeIsMissing(node.body)) {
+                    return emitCommentsOnNotEmittedNode(node);
+                }
+                var kind = node.kind, parent = node.parent;
+                if (kind !== 147 &&
+                    kind !== 146 &&
+                    parent &&
+                    parent.kind !== 253 &&
+                    parent.kind !== 174 &&
+                    parent.kind !== 170) {
+                    emitLeadingComments(node);
+                }
+                emitStart(node);
+                if (!shouldEmitAsArrowFunction(node)) {
+                    if (isES6ExportedDeclaration(node)) {
+                        write("export ");
+                        if (node.flags & 512) {
+                            write("default ");
+                        }
+                    }
+                    write("function");
+                    if (languageVersion >= 2 && node.asteriskToken) {
+                        write("*");
+                    }
+                    write(" ");
+                }
+                if (shouldEmitFunctionName(node)) {
+                    emitDeclarationName(node);
+                }
+                emitSignatureAndBody(node);
+                if (modulekind !== ts.ModuleKind.ES6 && kind === 220 && parent === currentSourceFile && node.name) {
+                    emitExportMemberAssignments(node.name);
+                }
+                emitEnd(node);
+                if (kind !== 147 &&
+                    kind !== 146 &&
+                    kind !== 180) {
+                    emitTrailingComments(node);
+                }
+            }
+            function emitCaptureThisForNodeIfNecessary(node) {
+                if (resolver.getNodeCheckFlags(node) & 4) {
+                    writeLine();
+                    emitStart(node);
+                    write("var _this = this;");
+                    emitEnd(node);
+                }
+            }
+            function emitSignatureParameters(node) {
+                increaseIndent();
+                write("(");
+                if (node) {
+                    var parameters = node.parameters;
+                    var skipCount = node.parameters.length && node.parameters[0].name.text === "this" ? 1 : 0;
+                    var omitCount = languageVersion < 2 && ts.hasDeclaredRestParameter(node) ? 1 : 0;
+                    emitList(parameters, skipCount, parameters.length - omitCount - skipCount, false, false);
+                }
+                write(")");
+                decreaseIndent();
+            }
+            function emitSignatureParametersForArrow(node) {
+                if (node.parameters.length === 1 && node.pos === node.parameters[0].pos) {
+                    emit(node.parameters[0]);
+                    return;
+                }
+                emitSignatureParameters(node);
+            }
+            function emitAsyncFunctionBodyForES6(node) {
+                var promiseConstructor = ts.getEntityNameFromTypeNode(node.type);
+                var isArrowFunction = node.kind === 180;
+                var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192) !== 0;
+                if (!isArrowFunction) {
+                    write(" {");
+                    increaseIndent();
+                    writeLine();
+                    if (resolver.getNodeCheckFlags(node) & 4096) {
+                        writeLines("\nconst _super = (function (geti, seti) {\n    const cache = Object.create(null);\n    return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);");
+                        writeLine();
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & 2048) {
+                        write("const _super = name => super[name];");
+                        writeLine();
+                    }
+                    write("return");
+                }
+                write(" __awaiter(this");
+                if (hasLexicalArguments) {
+                    write(", arguments, ");
+                }
+                else {
+                    write(", void 0, ");
+                }
+                if (languageVersion >= 2 || !promiseConstructor) {
+                    write("void 0");
+                }
+                else {
+                    emitEntityNameAsExpression(promiseConstructor, false);
+                }
+                write(", function* ()");
+                emitFunctionBody(node);
+                write(")");
+                if (!isArrowFunction) {
+                    write(";");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function emitFunctionBody(node) {
+                if (!node.body) {
+                    write(" { }");
+                }
+                else {
+                    if (node.body.kind === 199) {
+                        emitBlockFunctionBody(node, node.body);
+                    }
+                    else {
+                        emitExpressionFunctionBody(node, node.body);
+                    }
+                }
+            }
+            function emitSignatureAndBody(node) {
+                var saveConvertedLoopState = convertedLoopState;
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                if (shouldEmitAsArrowFunction(node)) {
+                    emitSignatureParametersForArrow(node);
+                    write(" =>");
+                }
+                else {
+                    emitSignatureParameters(node);
+                }
+                var isAsync = ts.isAsyncFunctionLike(node);
+                if (isAsync) {
+                    emitAsyncFunctionBodyForES6(node);
+                }
+                else {
+                    emitFunctionBody(node);
+                }
+                if (!isES6ExportedDeclaration(node)) {
+                    emitExportMemberAssignment(node);
+                }
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+            }
+            function emitFunctionBodyPreamble(node) {
+                emitCaptureThisForNodeIfNecessary(node);
+                emitDefaultValueAssignments(node);
+                emitRestParameter(node);
+            }
+            function emitExpressionFunctionBody(node, body) {
+                if (languageVersion < 2 || node.flags & 256) {
+                    emitDownLevelExpressionFunctionBody(node, body);
+                    return;
+                }
+                write(" ");
+                var current = body;
+                while (current.kind === 177) {
+                    current = current.expression;
+                }
+                emitParenthesizedIf(body, current.kind === 171);
+            }
+            function emitDownLevelExpressionFunctionBody(node, body) {
+                write(" {");
+                increaseIndent();
+                var outPos = writer.getTextPos();
+                emitDetachedCommentsAndUpdateCommentsInfo(node.body);
+                emitFunctionBodyPreamble(node);
+                var preambleEmitted = writer.getTextPos() !== outPos;
+                decreaseIndent();
+                if (!preambleEmitted && nodeStartPositionsAreOnSameLine(node, body)) {
+                    write(" ");
+                    emitStart(body);
+                    write("return ");
+                    emit(body);
+                    emitEnd(body);
+                    write(";");
+                    emitTempDeclarations(false);
+                    write(" ");
+                }
+                else {
+                    increaseIndent();
+                    writeLine();
+                    emitLeadingComments(node.body);
+                    emitStart(body);
+                    write("return ");
+                    emit(body);
+                    emitEnd(body);
+                    write(";");
+                    emitTrailingComments(node.body);
+                    emitTempDeclarations(true);
+                    decreaseIndent();
+                    writeLine();
+                }
+                emitStart(node.body);
+                write("}");
+                emitEnd(node.body);
+            }
+            function emitBlockFunctionBody(node, body) {
+                write(" {");
+                var initialTextPos = writer.getTextPos();
+                increaseIndent();
+                emitDetachedCommentsAndUpdateCommentsInfo(body.statements);
+                var startIndex = emitDirectivePrologues(body.statements, true);
+                emitFunctionBodyPreamble(node);
+                decreaseIndent();
+                var preambleEmitted = writer.getTextPos() !== initialTextPos;
+                if (!preambleEmitted && nodeEndIsOnSameLineAsNodeStart(body, body)) {
+                    for (var _a = 0, _b = body.statements; _a < _b.length; _a++) {
+                        var statement = _b[_a];
+                        write(" ");
+                        emit(statement);
+                    }
+                    emitTempDeclarations(false);
+                    write(" ");
+                    emitLeadingCommentsOfPosition(body.statements.end);
+                }
+                else {
+                    increaseIndent();
+                    emitLinesStartingAt(body.statements, startIndex);
+                    emitTempDeclarations(true);
+                    writeLine();
+                    emitLeadingCommentsOfPosition(body.statements.end);
+                    decreaseIndent();
+                }
+                emitToken(16, body.statements.end);
+            }
+            function getSuperCallAtGivenIndex(ctor, index) {
+                if (!ctor.body) {
+                    return undefined;
+                }
+                var statements = ctor.body.statements;
+                if (!statements || index >= statements.length) {
+                    return undefined;
+                }
+                var statement = statements[index];
+                if (statement.kind === 202) {
+                    return ts.isSuperCallExpression(statement.expression) ? statement : undefined;
+                }
+            }
+            function emitParameterPropertyAssignments(node) {
+                ts.forEach(node.parameters, function (param) {
+                    if (param.flags & 92) {
+                        writeLine();
+                        emitStart(param);
+                        emitStart(param.name);
+                        write("this.");
+                        emitNodeWithoutSourceMap(param.name);
+                        emitEnd(param.name);
+                        write(" = ");
+                        emit(param.name);
+                        write(";");
+                        emitEnd(param);
+                    }
+                });
+            }
+            function emitMemberAccessForPropertyName(memberName) {
+                if (memberName.kind === 9 || memberName.kind === 8) {
+                    write("[");
+                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
+                    write("]");
+                }
+                else if (memberName.kind === 140) {
+                    emitComputedPropertyName(memberName);
+                }
+                else {
+                    write(".");
+                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
+                }
+            }
+            function getInitializedProperties(node, isStatic) {
+                var properties = [];
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    if (member.kind === 145 && isStatic === ((member.flags & 32) !== 0) && member.initializer) {
+                        properties.push(member);
+                    }
+                }
+                return properties;
+            }
+            function emitPropertyDeclarations(node, properties) {
+                for (var _a = 0, properties_6 = properties; _a < properties_6.length; _a++) {
+                    var property = properties_6[_a];
+                    emitPropertyDeclaration(node, property);
+                }
+            }
+            function emitPropertyDeclaration(node, property, receiver, isExpression) {
+                writeLine();
+                emitLeadingComments(property);
+                emitStart(property);
+                emitStart(property.name);
+                if (receiver) {
+                    emit(receiver);
+                }
+                else {
+                    if (property.flags & 32) {
+                        emitDeclarationName(node);
+                    }
+                    else {
+                        write("this");
+                    }
+                }
+                emitMemberAccessForPropertyName(property.name);
+                emitEnd(property.name);
+                write(" = ");
+                emit(property.initializer);
+                if (!isExpression) {
+                    write(";");
+                }
+                emitEnd(property);
+                emitTrailingComments(property);
+            }
+            function emitMemberFunctionsForES5AndLower(node) {
+                ts.forEach(node.members, function (member) {
+                    if (member.kind === 198) {
+                        writeLine();
+                        write(";");
+                    }
+                    else if (member.kind === 147 || node.kind === 146) {
+                        if (!member.body) {
+                            return emitCommentsOnNotEmittedNode(member);
+                        }
+                        writeLine();
+                        emitLeadingComments(member);
+                        emitStart(member);
+                        emitStart(member.name);
+                        emitClassMemberPrefix(node, member);
+                        emitMemberAccessForPropertyName(member.name);
+                        emitEnd(member.name);
+                        write(" = ");
+                        emitFunctionDeclaration(member);
+                        emitEnd(member);
+                        write(";");
+                        emitTrailingComments(member);
+                    }
+                    else if (member.kind === 149 || member.kind === 150) {
+                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
+                        if (member === accessors.firstAccessor) {
+                            writeLine();
+                            emitStart(member);
+                            write("Object.defineProperty(");
+                            emitStart(member.name);
+                            emitClassMemberPrefix(node, member);
+                            write(", ");
+                            emitExpressionForPropertyName(member.name);
+                            emitEnd(member.name);
+                            write(", {");
+                            increaseIndent();
+                            if (accessors.getAccessor) {
+                                writeLine();
+                                emitLeadingComments(accessors.getAccessor);
+                                write("get: ");
+                                emitStart(accessors.getAccessor);
+                                write("function ");
+                                emitSignatureAndBody(accessors.getAccessor);
+                                emitEnd(accessors.getAccessor);
+                                emitTrailingComments(accessors.getAccessor);
+                                write(",");
+                            }
+                            if (accessors.setAccessor) {
+                                writeLine();
+                                emitLeadingComments(accessors.setAccessor);
+                                write("set: ");
+                                emitStart(accessors.setAccessor);
+                                write("function ");
+                                emitSignatureAndBody(accessors.setAccessor);
+                                emitEnd(accessors.setAccessor);
+                                emitTrailingComments(accessors.setAccessor);
+                                write(",");
+                            }
+                            writeLine();
+                            write("enumerable: true,");
+                            writeLine();
+                            write("configurable: true");
+                            decreaseIndent();
+                            writeLine();
+                            write("});");
+                            emitEnd(member);
+                        }
+                    }
+                });
+            }
+            function emitMemberFunctionsForES6AndHigher(node) {
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    if ((member.kind === 147 || node.kind === 146) && !member.body) {
+                        emitCommentsOnNotEmittedNode(member);
+                    }
+                    else if (member.kind === 147 ||
+                        member.kind === 149 ||
+                        member.kind === 150) {
+                        writeLine();
+                        emitLeadingComments(member);
+                        emitStart(member);
+                        if (member.flags & 32) {
+                            write("static ");
+                        }
+                        if (member.kind === 149) {
+                            write("get ");
+                        }
+                        else if (member.kind === 150) {
+                            write("set ");
+                        }
+                        if (member.asteriskToken) {
+                            write("*");
+                        }
+                        emit(member.name);
+                        emitSignatureAndBody(member);
+                        emitEnd(member);
+                        emitTrailingComments(member);
+                    }
+                    else if (member.kind === 198) {
+                        writeLine();
+                        write(";");
+                    }
+                }
+            }
+            function emitConstructor(node, baseTypeElement) {
+                var saveConvertedLoopState = convertedLoopState;
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                emitConstructorWorker(node, baseTypeElement);
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+            }
+            function emitConstructorWorker(node, baseTypeElement) {
+                var hasInstancePropertyWithInitializer = false;
+                ts.forEach(node.members, function (member) {
+                    if (member.kind === 148 && !member.body) {
+                        emitCommentsOnNotEmittedNode(member);
+                    }
+                    if (member.kind === 145 && member.initializer && (member.flags & 32) === 0) {
+                        hasInstancePropertyWithInitializer = true;
+                    }
+                });
+                var ctor = ts.getFirstConstructorWithBody(node);
+                if (languageVersion >= 2 && !ctor && !hasInstancePropertyWithInitializer) {
+                    return;
+                }
+                if (ctor) {
+                    emitLeadingComments(ctor);
+                }
+                emitStart(ctor || node);
+                if (languageVersion < 2) {
+                    write("function ");
+                    emitDeclarationName(node);
+                    emitSignatureParameters(ctor);
+                }
+                else {
+                    write("constructor");
+                    if (ctor) {
+                        emitSignatureParameters(ctor);
+                    }
+                    else {
+                        if (baseTypeElement) {
+                            write("(...args)");
+                        }
+                        else {
+                            write("()");
+                        }
+                    }
+                }
+                var startIndex = 0;
+                write(" {");
+                increaseIndent();
+                if (ctor) {
+                    startIndex = emitDirectivePrologues(ctor.body.statements, true);
+                    emitDetachedCommentsAndUpdateCommentsInfo(ctor.body.statements);
+                }
+                emitCaptureThisForNodeIfNecessary(node);
+                var superCall;
+                if (ctor) {
+                    emitDefaultValueAssignments(ctor);
+                    emitRestParameter(ctor);
+                    if (baseTypeElement) {
+                        superCall = getSuperCallAtGivenIndex(ctor, startIndex);
+                        if (superCall) {
+                            writeLine();
+                            emit(superCall);
+                        }
+                    }
+                    emitParameterPropertyAssignments(ctor);
+                }
+                else {
+                    if (baseTypeElement) {
+                        writeLine();
+                        emitStart(baseTypeElement);
+                        if (languageVersion < 2) {
+                            write("_super.apply(this, arguments);");
+                        }
+                        else {
+                            write("super(...args);");
+                        }
+                        emitEnd(baseTypeElement);
+                    }
+                }
+                emitPropertyDeclarations(node, getInitializedProperties(node, false));
+                if (ctor) {
+                    var statements = ctor.body.statements;
+                    if (superCall) {
+                        statements = statements.slice(1);
+                    }
+                    emitLinesStartingAt(statements, startIndex);
+                }
+                emitTempDeclarations(true);
+                writeLine();
+                if (ctor) {
+                    emitLeadingCommentsOfPosition(ctor.body.statements.end);
+                }
+                decreaseIndent();
+                emitToken(16, ctor ? ctor.body.statements.end : node.members.end);
+                emitEnd(ctor || node);
+                if (ctor) {
+                    emitTrailingComments(ctor);
+                }
+            }
+            function emitClassExpression(node) {
+                return emitClassLikeDeclaration(node);
+            }
+            function emitClassDeclaration(node) {
+                return emitClassLikeDeclaration(node);
+            }
+            function emitClassLikeDeclaration(node) {
+                if (languageVersion < 2) {
+                    emitClassLikeDeclarationBelowES6(node);
+                }
+                else {
+                    emitClassLikeDeclarationForES6AndHigher(node);
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile && node.name) {
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            function emitClassLikeDeclarationForES6AndHigher(node) {
+                var decoratedClassAlias;
+                var isHoistedDeclarationInSystemModule = shouldHoistDeclarationInSystemJsModule(node);
+                var isDecorated = ts.nodeIsDecorated(node);
+                var rewriteAsClassExpression = isDecorated || isHoistedDeclarationInSystemModule;
+                if (node.kind === 221) {
+                    if (rewriteAsClassExpression) {
+                        if (isDecorated && resolver.getNodeCheckFlags(node) & 524288) {
+                            decoratedClassAlias = ts.unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default"));
+                            decoratedClassAliases[ts.getNodeId(node)] = decoratedClassAlias;
+                        }
+                        if (isES6ExportedDeclaration(node) && !(node.flags & 512) && decoratedClassAlias === undefined) {
+                            write("export ");
+                        }
+                        if (!isHoistedDeclarationInSystemModule) {
+                            write("let ");
+                        }
+                        if (decoratedClassAlias !== undefined) {
+                            write("" + decoratedClassAlias);
+                        }
+                        else {
+                            emitDeclarationName(node);
+                        }
+                        write(" = ");
+                    }
+                    else if (isES6ExportedDeclaration(node)) {
+                        write("export ");
+                        if (node.flags & 512) {
+                            write("default ");
+                        }
+                    }
+                }
+                var staticProperties = getInitializedProperties(node, true);
+                var isClassExpressionWithStaticProperties = staticProperties.length > 0 && node.kind === 192;
+                var tempVariable;
+                if (isClassExpressionWithStaticProperties) {
+                    tempVariable = createAndRecordTempVariable(0);
+                    write("(");
+                    increaseIndent();
+                    emit(tempVariable);
+                    write(" = ");
+                }
+                write("class");
+                if (node.name || (node.flags & 512 && (staticProperties.length > 0 || modulekind !== ts.ModuleKind.ES6) && !rewriteAsClassExpression)) {
+                    write(" ");
+                    emitDeclarationName(node);
+                }
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+                if (baseTypeNode) {
+                    write(" extends ");
+                    emit(baseTypeNode.expression);
+                }
+                write(" {");
+                increaseIndent();
+                writeLine();
+                emitConstructor(node, baseTypeNode);
+                emitMemberFunctionsForES6AndHigher(node);
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.members.end);
+                if (rewriteAsClassExpression) {
+                    if (decoratedClassAlias !== undefined) {
+                        write(";");
+                        writeLine();
+                        if (isES6ExportedDeclaration(node) && !(node.flags & 512)) {
+                            write("export ");
+                        }
+                        write("let ");
+                        emitDeclarationName(node);
+                        write(" = " + decoratedClassAlias);
+                    }
+                    decoratedClassAliases[ts.getNodeId(node)] = undefined;
+                    write(";");
+                }
+                if (isClassExpressionWithStaticProperties) {
+                    for (var _a = 0, staticProperties_1 = staticProperties; _a < staticProperties_1.length; _a++) {
+                        var property = staticProperties_1[_a];
+                        write(",");
+                        writeLine();
+                        emitPropertyDeclaration(node, property, tempVariable, true);
+                    }
+                    write(",");
+                    writeLine();
+                    emit(tempVariable);
+                    decreaseIndent();
+                    write(")");
+                }
+                else {
+                    writeLine();
+                    emitPropertyDeclarations(node, staticProperties);
+                    emitDecoratorsOfClass(node, decoratedClassAlias);
+                }
+                if (!(node.flags & 1)) {
+                    return;
+                }
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    emitExportMemberAssignment(node);
+                }
+                else {
+                    if (node.flags & 512) {
+                        if (isDecorated) {
+                            writeLine();
+                            write("export default ");
+                            emitDeclarationName(node);
+                            write(";");
+                        }
+                    }
+                    else if (node.parent.kind !== 256) {
+                        writeLine();
+                        emitStart(node);
+                        emitModuleMemberName(node);
+                        write(" = ");
+                        emitDeclarationName(node);
+                        emitEnd(node);
+                        write(";");
+                    }
+                }
+            }
+            function emitClassLikeDeclarationBelowES6(node) {
+                if (node.kind === 221) {
+                    if (!shouldHoistDeclarationInSystemJsModule(node)) {
+                        write("var ");
+                    }
+                    emitDeclarationName(node);
+                    write(" = ");
+                }
+                write("(function (");
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+                if (baseTypeNode) {
+                    write("_super");
+                }
+                write(") {");
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                var saveComputedPropertyNamesToGeneratedNames = computedPropertyNamesToGeneratedNames;
+                var saveConvertedLoopState = convertedLoopState;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                computedPropertyNamesToGeneratedNames = undefined;
+                increaseIndent();
+                if (baseTypeNode) {
+                    writeLine();
+                    emitStart(baseTypeNode);
+                    write("__extends(");
+                    emitDeclarationName(node);
+                    write(", _super);");
+                    emitEnd(baseTypeNode);
+                }
+                writeLine();
+                emitConstructor(node, baseTypeNode);
+                emitMemberFunctionsForES5AndLower(node);
+                emitPropertyDeclarations(node, getInitializedProperties(node, true));
+                writeLine();
+                emitDecoratorsOfClass(node, undefined);
+                writeLine();
+                emitToken(16, node.members.end, function () {
+                    write("return ");
+                    emitDeclarationName(node);
+                });
+                write(";");
+                emitTempDeclarations(true);
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+                computedPropertyNamesToGeneratedNames = saveComputedPropertyNamesToGeneratedNames;
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.members.end);
+                emitStart(node);
+                write("(");
+                if (baseTypeNode) {
+                    emit(baseTypeNode.expression);
+                }
+                write("))");
+                if (node.kind === 221) {
+                    write(";");
+                }
+                emitEnd(node);
+                if (node.kind === 221) {
+                    emitExportMemberAssignment(node);
+                }
+            }
+            function emitClassMemberPrefix(node, member) {
+                emitDeclarationName(node);
+                if (!(member.flags & 32)) {
+                    write(".prototype");
+                }
+            }
+            function emitDecoratorsOfClass(node, decoratedClassAlias) {
+                emitDecoratorsOfMembers(node, 0);
+                emitDecoratorsOfMembers(node, 32);
+                emitDecoratorsOfConstructor(node, decoratedClassAlias);
+            }
+            function emitDecoratorsOfConstructor(node, decoratedClassAlias) {
+                var decorators = node.decorators;
+                var constructor = ts.getFirstConstructorWithBody(node);
+                var firstParameterDecorator = constructor && ts.forEach(constructor.parameters, function (parameter) { return parameter.decorators; });
+                if (!decorators && !firstParameterDecorator) {
+                    return;
+                }
+                writeLine();
+                emitStart(node.decorators || firstParameterDecorator);
+                emitDeclarationName(node);
+                if (decoratedClassAlias !== undefined) {
+                    write(" = " + decoratedClassAlias);
+                }
+                write(" = __decorate([");
+                increaseIndent();
+                writeLine();
+                var decoratorCount = decorators ? decorators.length : 0;
+                var argumentsWritten = emitList(decorators, 0, decoratorCount, true, false, false, true, function (decorator) { return emit(decorator.expression); });
+                if (firstParameterDecorator) {
+                    argumentsWritten += emitDecoratorsOfParameters(constructor, argumentsWritten > 0);
+                }
+                emitSerializedTypeMetadata(node, argumentsWritten >= 0);
+                decreaseIndent();
+                writeLine();
+                write("], ");
+                emitDeclarationName(node);
+                write(")");
+                emitEnd(node.decorators || firstParameterDecorator);
+                write(";");
+                writeLine();
+            }
+            function emitDecoratorsOfMembers(node, staticFlag) {
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    if ((member.flags & 32) !== staticFlag) {
+                        continue;
+                    }
+                    if (!ts.nodeCanBeDecorated(member)) {
+                        continue;
+                    }
+                    var decorators = void 0;
+                    var functionLikeMember = void 0;
+                    if (ts.isAccessor(member)) {
+                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
+                        if (member !== accessors.firstAccessor) {
+                            continue;
+                        }
+                        decorators = accessors.firstAccessor.decorators;
+                        if (!decorators && accessors.secondAccessor) {
+                            decorators = accessors.secondAccessor.decorators;
+                        }
+                        functionLikeMember = accessors.setAccessor;
+                    }
+                    else {
+                        decorators = member.decorators;
+                        if (member.kind === 147) {
+                            functionLikeMember = member;
+                        }
+                    }
+                    var firstParameterDecorator = functionLikeMember && ts.forEach(functionLikeMember.parameters, function (parameter) { return parameter.decorators; });
+                    if (!decorators && !firstParameterDecorator) {
+                        continue;
+                    }
+                    writeLine();
+                    emitStart(decorators || firstParameterDecorator);
+                    write("__decorate([");
+                    increaseIndent();
+                    writeLine();
+                    var decoratorCount = decorators ? decorators.length : 0;
+                    var argumentsWritten = emitList(decorators, 0, decoratorCount, true, false, false, true, function (decorator) { return emit(decorator.expression); });
+                    if (firstParameterDecorator) {
+                        argumentsWritten += emitDecoratorsOfParameters(functionLikeMember, argumentsWritten > 0);
+                    }
+                    emitSerializedTypeMetadata(member, argumentsWritten > 0);
+                    decreaseIndent();
+                    writeLine();
+                    write("], ");
+                    emitClassMemberPrefix(node, member);
+                    write(", ");
+                    emitExpressionForPropertyName(member.name);
+                    if (languageVersion > 0) {
+                        if (member.kind !== 145) {
+                            write(", null");
+                        }
+                        else {
+                            write(", void 0");
+                        }
+                    }
+                    write(")");
+                    emitEnd(decorators || firstParameterDecorator);
+                    write(";");
+                    writeLine();
+                }
+            }
+            function emitDecoratorsOfParameters(node, leadingComma) {
+                var argumentsWritten = 0;
+                if (node) {
+                    var parameterIndex_1 = 0;
+                    for (var _a = 0, _b = node.parameters; _a < _b.length; _a++) {
+                        var parameter = _b[_a];
+                        if (ts.nodeIsDecorated(parameter)) {
+                            var decorators = parameter.decorators;
+                            argumentsWritten += emitList(decorators, 0, decorators.length, true, false, leadingComma, true, function (decorator) {
+                                write("__param(" + parameterIndex_1 + ", ");
+                                emit(decorator.expression);
+                                write(")");
+                            });
+                            leadingComma = true;
+                        }
+                        parameterIndex_1++;
+                    }
+                }
+                return argumentsWritten;
+            }
+            function shouldEmitTypeMetadata(node) {
+                switch (node.kind) {
+                    case 147:
+                    case 149:
+                    case 150:
+                    case 145:
+                        return true;
+                }
+                return false;
+            }
+            function shouldEmitReturnTypeMetadata(node) {
+                switch (node.kind) {
+                    case 147:
+                        return true;
+                }
+                return false;
+            }
+            function shouldEmitParamTypesMetadata(node) {
+                switch (node.kind) {
+                    case 221:
+                    case 147:
+                    case 150:
+                        return true;
+                }
+                return false;
+            }
+            function emitSerializedTypeOfNode(node) {
+                switch (node.kind) {
+                    case 221:
+                        write("Function");
+                        return;
+                    case 145:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 142:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 149:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 150:
+                        emitSerializedTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
+                        return;
+                }
+                if (ts.isFunctionLike(node)) {
+                    write("Function");
+                    return;
+                }
+                write("void 0");
+            }
+            function emitSerializedTypeNode(node) {
+                if (node) {
+                    switch (node.kind) {
+                        case 103:
+                            write("void 0");
+                            return;
+                        case 164:
+                            emitSerializedTypeNode(node.type);
+                            return;
+                        case 156:
+                        case 157:
+                            write("Function");
+                            return;
+                        case 160:
+                        case 161:
+                            write("Array");
+                            return;
+                        case 154:
+                        case 120:
+                            write("Boolean");
+                            return;
+                        case 132:
+                        case 166:
+                            write("String");
+                            return;
+                        case 130:
+                            write("Number");
+                            return;
+                        case 133:
+                            write("Symbol");
+                            return;
+                        case 155:
+                            emitSerializedTypeReferenceNode(node);
+                            return;
+                        case 158:
+                        case 159:
+                        case 162:
+                        case 163:
+                        case 117:
+                        case 165:
+                            break;
+                        default:
+                            ts.Debug.fail("Cannot serialize unexpected type node.");
+                            break;
+                    }
+                }
+                write("Object");
+            }
+            function emitSerializedTypeReferenceNode(node) {
+                var location = node.parent;
+                while (ts.isDeclaration(location) || ts.isTypeNode(location)) {
+                    location = location.parent;
+                }
+                var typeName = ts.cloneEntityName(node.typeName, location);
+                var result = resolver.getTypeReferenceSerializationKind(typeName);
+                switch (result) {
+                    case ts.TypeReferenceSerializationKind.Unknown:
+                        var temp = createAndRecordTempVariable(0);
+                        write("(typeof (");
+                        emitNodeWithoutSourceMap(temp);
+                        write(" = ");
+                        emitEntityNameAsExpression(typeName, true);
+                        write(") === 'function' && ");
+                        emitNodeWithoutSourceMap(temp);
+                        write(") || Object");
+                        break;
+                    case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
+                        emitEntityNameAsExpression(typeName, false);
+                        break;
+                    case ts.TypeReferenceSerializationKind.VoidType:
+                        write("void 0");
+                        break;
+                    case ts.TypeReferenceSerializationKind.BooleanType:
+                        write("Boolean");
+                        break;
+                    case ts.TypeReferenceSerializationKind.NumberLikeType:
+                        write("Number");
+                        break;
+                    case ts.TypeReferenceSerializationKind.StringLikeType:
+                        write("String");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ArrayLikeType:
+                        write("Array");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ESSymbolType:
+                        if (languageVersion < 2) {
+                            write("typeof Symbol === 'function' ? Symbol : Object");
+                        }
+                        else {
+                            write("Symbol");
+                        }
+                        break;
+                    case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
+                        write("Function");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ObjectType:
+                        write("Object");
+                        break;
+                }
+            }
+            function emitSerializedParameterTypesOfNode(node) {
+                if (node) {
+                    var valueDeclaration = void 0;
+                    if (node.kind === 221) {
+                        valueDeclaration = ts.getFirstConstructorWithBody(node);
+                    }
+                    else if (ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)) {
+                        valueDeclaration = node;
+                    }
+                    if (valueDeclaration) {
+                        var parameters = valueDeclaration.parameters;
+                        var parameterCount = parameters.length;
+                        if (parameterCount > 0) {
+                            for (var i = 0; i < parameterCount; i++) {
+                                if (i > 0) {
+                                    write(", ");
+                                }
+                                if (parameters[i].dotDotDotToken) {
+                                    var parameterType = parameters[i].type;
+                                    if (parameterType.kind === 160) {
+                                        parameterType = parameterType.elementType;
+                                    }
+                                    else if (parameterType.kind === 155 && parameterType.typeArguments && parameterType.typeArguments.length === 1) {
+                                        parameterType = parameterType.typeArguments[0];
+                                    }
+                                    else {
+                                        parameterType = undefined;
+                                    }
+                                    emitSerializedTypeNode(parameterType);
+                                }
+                                else {
+                                    emitSerializedTypeOfNode(parameters[i]);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            function emitSerializedReturnTypeOfNode(node) {
+                if (node && ts.isFunctionLike(node) && node.type) {
+                    emitSerializedTypeNode(node.type);
+                    return;
+                }
+                write("void 0");
+            }
+            function emitSerializedTypeMetadata(node, writeComma) {
+                var argumentsWritten = 0;
+                if (compilerOptions.emitDecoratorMetadata) {
+                    if (shouldEmitTypeMetadata(node)) {
+                        if (writeComma) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:type', ");
+                        emitSerializedTypeOfNode(node);
+                        write(")");
+                        argumentsWritten++;
+                    }
+                    if (shouldEmitParamTypesMetadata(node)) {
+                        if (writeComma || argumentsWritten) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:paramtypes', [");
+                        emitSerializedParameterTypesOfNode(node);
+                        write("])");
+                        argumentsWritten++;
+                    }
+                    if (shouldEmitReturnTypeMetadata(node)) {
+                        if (writeComma || argumentsWritten) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:returntype', ");
+                        emitSerializedReturnTypeOfNode(node);
+                        write(")");
+                        argumentsWritten++;
+                    }
+                }
+                return argumentsWritten;
+            }
+            function emitInterfaceDeclaration(node) {
+                emitCommentsOnNotEmittedNode(node);
+            }
+            function shouldEmitEnumDeclaration(node) {
+                var isConstEnum = ts.isConst(node);
+                return !isConstEnum || compilerOptions.preserveConstEnums || compilerOptions.isolatedModules;
+            }
+            function emitEnumDeclaration(node) {
+                if (!shouldEmitEnumDeclaration(node)) {
+                    return;
+                }
+                if (!shouldHoistDeclarationInSystemJsModule(node)) {
+                    var isES6ExportedEnum = isES6ExportedDeclaration(node);
+                    if (!(node.flags & 1) || (isES6ExportedEnum && isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 224))) {
+                        emitStart(node);
+                        if (isES6ExportedEnum) {
+                            write("export ");
+                        }
+                        write("var ");
+                        emit(node.name);
+                        emitEnd(node);
+                        write(";");
+                    }
+                }
+                writeLine();
+                emitStart(node);
+                write("(function (");
+                emitStart(node.name);
+                write(getGeneratedNameForNode(node));
+                emitEnd(node.name);
+                write(") {");
+                increaseIndent();
+                emitLines(node.members);
+                decreaseIndent();
+                writeLine();
+                emitToken(16, node.members.end);
+                write(")(");
+                emitModuleMemberName(node);
+                write(" || (");
+                emitModuleMemberName(node);
+                write(" = {}));");
+                emitEnd(node);
+                if (!isES6ExportedDeclaration(node) && node.flags & 1 && !shouldHoistDeclarationInSystemJsModule(node)) {
+                    writeLine();
+                    emitStart(node);
+                    write("var ");
+                    emit(node.name);
+                    write(" = ");
+                    emitModuleMemberName(node);
+                    emitEnd(node);
+                    write(";");
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
+                    if (modulekind === ts.ModuleKind.System && (node.flags & 1)) {
+                        writeLine();
+                        write(exportFunctionForFile + "(\"");
+                        emitDeclarationName(node);
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(");");
+                    }
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            function emitEnumMember(node) {
+                var enumParent = node.parent;
+                emitStart(node);
+                write(getGeneratedNameForNode(enumParent));
+                write("[");
+                write(getGeneratedNameForNode(enumParent));
+                write("[");
+                emitExpressionForPropertyName(node.name);
+                write("] = ");
+                writeEnumMemberDeclarationValue(node);
+                write("] = ");
+                emitExpressionForPropertyName(node.name);
+                emitEnd(node);
+                write(";");
+            }
+            function writeEnumMemberDeclarationValue(member) {
+                var value = resolver.getConstantValue(member);
+                if (value !== undefined) {
+                    write(value.toString());
+                    return;
+                }
+                else if (member.initializer) {
+                    emit(member.initializer);
+                }
+                else {
+                    write("undefined");
+                }
+            }
+            function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
+                if (moduleDeclaration.body.kind === 225) {
+                    var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
+                    return recursiveInnerModule || moduleDeclaration.body;
+                }
+            }
+            function shouldEmitModuleDeclaration(node) {
+                return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules);
+            }
+            function isModuleMergedWithES6Class(node) {
+                return languageVersion === 2 && !!(resolver.getNodeCheckFlags(node) & 32768);
+            }
+            function isFirstDeclarationOfKind(node, declarations, kind) {
+                return !ts.forEach(declarations, function (declaration) { return declaration.kind === kind && declaration.pos < node.pos; });
+            }
+            function emitModuleDeclaration(node) {
+                var shouldEmit = shouldEmitModuleDeclaration(node);
+                if (!shouldEmit) {
+                    return emitCommentsOnNotEmittedNode(node);
+                }
+                var hoistedInDeclarationScope = shouldHoistDeclarationInSystemJsModule(node);
+                var emitVarForModule = !hoistedInDeclarationScope && !isModuleMergedWithES6Class(node);
+                if (emitVarForModule) {
+                    var isES6ExportedNamespace = isES6ExportedDeclaration(node);
+                    if (!isES6ExportedNamespace || isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 225)) {
+                        emitStart(node);
+                        if (isES6ExportedNamespace) {
+                            write("export ");
+                        }
+                        write("var ");
+                        emit(node.name);
+                        write(";");
+                        emitEnd(node);
+                        writeLine();
+                    }
+                }
+                emitStart(node);
+                write("(function (");
+                emitStart(node.name);
+                write(getGeneratedNameForNode(node));
+                emitEnd(node.name);
+                write(") ");
+                if (node.body.kind === 226) {
+                    var saveConvertedLoopState = convertedLoopState;
+                    var saveTempFlags = tempFlags;
+                    var saveTempVariables = tempVariables;
+                    convertedLoopState = undefined;
+                    tempFlags = 0;
+                    tempVariables = undefined;
+                    emit(node.body);
+                    ts.Debug.assert(convertedLoopState === undefined);
+                    convertedLoopState = saveConvertedLoopState;
+                    tempFlags = saveTempFlags;
+                    tempVariables = saveTempVariables;
+                }
+                else {
+                    write("{");
+                    increaseIndent();
+                    emitCaptureThisForNodeIfNecessary(node);
+                    writeLine();
+                    emit(node.body);
+                    decreaseIndent();
+                    writeLine();
+                    var moduleBlock = getInnerMostModuleDeclarationFromDottedModule(node).body;
+                    emitToken(16, moduleBlock.statements.end);
+                }
+                write(")(");
+                if ((node.flags & 1) && !isES6ExportedDeclaration(node)) {
+                    emit(node.name);
+                    write(" = ");
+                }
+                emitModuleMemberName(node);
+                write(" || (");
+                emitModuleMemberName(node);
+                write(" = {}));");
+                emitEnd(node);
+                if (!isES6ExportedDeclaration(node) && node.name.kind === 69 && node.parent === currentSourceFile) {
+                    if (modulekind === ts.ModuleKind.System && (node.flags & 1)) {
+                        writeLine();
+                        write(exportFunctionForFile + "(\"");
+                        emitDeclarationName(node);
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(");");
+                    }
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            function tryRenameExternalModule(moduleName) {
+                if (renamedDependencies && ts.hasProperty(renamedDependencies, moduleName.text)) {
+                    return "\"" + renamedDependencies[moduleName.text] + "\"";
+                }
+                return undefined;
+            }
+            function emitRequire(moduleName) {
+                if (moduleName.kind === 9) {
+                    write("require(");
+                    var text = tryRenameExternalModule(moduleName);
+                    if (text) {
+                        write(text);
+                    }
+                    else {
+                        emitStart(moduleName);
+                        emitLiteral(moduleName);
+                        emitEnd(moduleName);
+                    }
+                    emitToken(18, moduleName.end);
+                }
+                else {
+                    write("require()");
+                }
+            }
+            function getNamespaceDeclarationNode(node) {
+                if (node.kind === 229) {
+                    return node;
+                }
+                var importClause = node.importClause;
+                if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232) {
+                    return importClause.namedBindings;
+                }
+            }
+            function isDefaultImport(node) {
+                return node.kind === 230 && node.importClause && !!node.importClause.name;
+            }
+            function emitExportImportAssignments(node) {
+                if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
+                    emitExportMemberAssignments(node.name);
+                }
+                ts.forEachChild(node, emitExportImportAssignments);
+            }
+            function emitImportDeclaration(node) {
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    return emitExternalImportDeclaration(node);
+                }
+                if (node.importClause) {
+                    var shouldEmitDefaultBindings = resolver.isReferencedAliasDeclaration(node.importClause);
+                    var shouldEmitNamedBindings = node.importClause.namedBindings && resolver.isReferencedAliasDeclaration(node.importClause.namedBindings, true);
+                    if (shouldEmitDefaultBindings || shouldEmitNamedBindings) {
+                        write("import ");
+                        emitStart(node.importClause);
+                        if (shouldEmitDefaultBindings) {
+                            emit(node.importClause.name);
+                            if (shouldEmitNamedBindings) {
+                                write(", ");
+                            }
+                        }
+                        if (shouldEmitNamedBindings) {
+                            emitLeadingComments(node.importClause.namedBindings);
+                            emitStart(node.importClause.namedBindings);
+                            if (node.importClause.namedBindings.kind === 232) {
+                                write("* as ");
+                                emit(node.importClause.namedBindings.name);
+                            }
+                            else {
+                                write("{ ");
+                                emitExportOrImportSpecifierList(node.importClause.namedBindings.elements, resolver.isReferencedAliasDeclaration);
+                                write(" }");
+                            }
+                            emitEnd(node.importClause.namedBindings);
+                            emitTrailingComments(node.importClause.namedBindings);
+                        }
+                        emitEnd(node.importClause);
+                        write(" from ");
+                        emit(node.moduleSpecifier);
+                        write(";");
+                    }
+                }
+                else {
+                    write("import ");
+                    emit(node.moduleSpecifier);
+                    write(";");
+                }
+            }
+            function emitExternalImportDeclaration(node) {
+                if (ts.contains(externalImports, node)) {
+                    var isExportedImport = node.kind === 229 && (node.flags & 1) !== 0;
+                    var namespaceDeclaration = getNamespaceDeclarationNode(node);
+                    var varOrConst = (languageVersion <= 1) ? "var " : "const ";
+                    if (modulekind !== ts.ModuleKind.AMD) {
+                        emitLeadingComments(node);
+                        emitStart(node);
+                        if (namespaceDeclaration && !isDefaultImport(node)) {
+                            if (!isExportedImport) {
+                                write(varOrConst);
+                            }
+                            ;
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                        }
+                        else {
+                            var isNakedImport = 230 && !node.importClause;
+                            if (!isNakedImport) {
+                                write(varOrConst);
+                                write(getGeneratedNameForNode(node));
+                                write(" = ");
+                            }
+                        }
+                        emitRequire(ts.getExternalModuleName(node));
+                        if (namespaceDeclaration && isDefaultImport(node)) {
+                            write(", ");
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            write(getGeneratedNameForNode(node));
+                        }
+                        write(";");
+                        emitEnd(node);
+                        emitExportImportAssignments(node);
+                        emitTrailingComments(node);
+                    }
+                    else {
+                        if (isExportedImport) {
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            emit(namespaceDeclaration.name);
+                            write(";");
+                        }
+                        else if (namespaceDeclaration && isDefaultImport(node)) {
+                            write(varOrConst);
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            write(getGeneratedNameForNode(node));
+                            write(";");
+                        }
+                        emitExportImportAssignments(node);
+                    }
+                }
+            }
+            function emitImportEqualsDeclaration(node) {
+                if (ts.isExternalModuleImportEqualsDeclaration(node)) {
+                    emitExternalImportDeclaration(node);
+                    return;
+                }
+                if (resolver.isReferencedAliasDeclaration(node) ||
+                    (!isCurrentFileExternalModule && resolver.isTopLevelValueImportEqualsWithEntityName(node))) {
+                    emitLeadingComments(node);
+                    emitStart(node);
+                    var variableDeclarationIsHoisted = shouldHoistVariable(node, true);
+                    var isExported = isSourceFileLevelDeclarationInSystemJsModule(node, true);
+                    if (!variableDeclarationIsHoisted) {
+                        ts.Debug.assert(!isExported);
+                        if (isES6ExportedDeclaration(node)) {
+                            write("export ");
+                            write("var ");
+                        }
+                        else if (!(node.flags & 1)) {
+                            write("var ");
+                        }
+                    }
+                    if (isExported) {
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithoutSourceMap(node.name);
+                        write("\", ");
+                    }
+                    emitModuleMemberName(node);
+                    write(" = ");
+                    emit(node.moduleReference);
+                    if (isExported) {
+                        write(")");
+                    }
+                    write(";");
+                    emitEnd(node);
+                    emitExportImportAssignments(node);
+                    emitTrailingComments(node);
+                }
+            }
+            function emitExportDeclaration(node) {
+                ts.Debug.assert(modulekind !== ts.ModuleKind.System);
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    if (node.moduleSpecifier && (!node.exportClause || resolver.isValueAliasDeclaration(node))) {
+                        emitStart(node);
+                        var generatedName = getGeneratedNameForNode(node);
+                        if (node.exportClause) {
+                            if (modulekind !== ts.ModuleKind.AMD) {
+                                write("var ");
+                                write(generatedName);
+                                write(" = ");
+                                emitRequire(ts.getExternalModuleName(node));
+                                write(";");
+                            }
+                            for (var _a = 0, _b = node.exportClause.elements; _a < _b.length; _a++) {
+                                var specifier = _b[_a];
+                                if (resolver.isValueAliasDeclaration(specifier)) {
+                                    writeLine();
+                                    emitStart(specifier);
+                                    emitContainingModuleName(specifier);
+                                    write(".");
+                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                                    write(" = ");
+                                    write(generatedName);
+                                    write(".");
+                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.propertyName || specifier.name);
+                                    write(";");
+                                    emitEnd(specifier);
+                                }
+                            }
+                        }
+                        else {
+                            if (hasExportStarsToExportValues && resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
+                                writeLine();
+                                write("__export(");
+                                if (modulekind !== ts.ModuleKind.AMD) {
+                                    emitRequire(ts.getExternalModuleName(node));
+                                }
+                                else {
+                                    write(generatedName);
+                                }
+                                write(");");
+                            }
+                        }
+                        emitEnd(node);
+                    }
+                }
+                else {
+                    if (!node.exportClause || resolver.isValueAliasDeclaration(node)) {
+                        write("export ");
+                        if (node.exportClause) {
+                            write("{ ");
+                            emitExportOrImportSpecifierList(node.exportClause.elements, resolver.isValueAliasDeclaration);
+                            write(" }");
+                        }
+                        else {
+                            write("*");
+                        }
+                        if (node.moduleSpecifier) {
+                            write(" from ");
+                            emit(node.moduleSpecifier);
+                        }
+                        write(";");
+                    }
+                }
+            }
+            function emitExportOrImportSpecifierList(specifiers, shouldEmit) {
+                ts.Debug.assert(modulekind === ts.ModuleKind.ES6);
+                var needsComma = false;
+                for (var _a = 0, specifiers_1 = specifiers; _a < specifiers_1.length; _a++) {
+                    var specifier = specifiers_1[_a];
+                    if (shouldEmit(specifier)) {
+                        if (needsComma) {
+                            write(", ");
+                        }
+                        if (specifier.propertyName) {
+                            emit(specifier.propertyName);
+                            write(" as ");
+                        }
+                        emit(specifier.name);
+                        needsComma = true;
+                    }
+                }
+            }
+            function emitExportAssignment(node) {
+                if (!node.isExportEquals && resolver.isValueAliasDeclaration(node)) {
+                    if (modulekind === ts.ModuleKind.ES6) {
+                        writeLine();
+                        emitStart(node);
+                        write("export default ");
+                        var expression = node.expression;
+                        emit(expression);
+                        if (expression.kind !== 220 &&
+                            expression.kind !== 221) {
+                            write(";");
+                        }
+                        emitEnd(node);
+                    }
+                    else {
+                        writeLine();
+                        emitStart(node);
+                        if (modulekind === ts.ModuleKind.System) {
+                            write(exportFunctionForFile + "(\"default\",");
+                            emit(node.expression);
+                            write(")");
+                        }
+                        else {
+                            emitEs6ExportDefaultCompat(node);
+                            emitContainingModuleName(node);
+                            if (languageVersion === 0) {
+                                write('["default"] = ');
+                            }
+                            else {
+                                write(".default = ");
+                            }
+                            emit(node.expression);
+                        }
+                        write(";");
+                        emitEnd(node);
+                    }
+                }
+            }
+            function collectExternalModuleInfo(sourceFile) {
+                externalImports = [];
+                exportSpecifiers = {};
+                exportEquals = undefined;
+                hasExportStarsToExportValues = false;
+                for (var _a = 0, _b = sourceFile.statements; _a < _b.length; _a++) {
+                    var node = _b[_a];
+                    switch (node.kind) {
+                        case 230:
+                            if (!node.importClause ||
+                                resolver.isReferencedAliasDeclaration(node.importClause, true)) {
+                                externalImports.push(node);
+                            }
+                            break;
+                        case 229:
+                            if (node.moduleReference.kind === 240 && resolver.isReferencedAliasDeclaration(node)) {
+                                externalImports.push(node);
+                            }
+                            break;
+                        case 236:
+                            if (node.moduleSpecifier) {
+                                if (!node.exportClause) {
+                                    if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
+                                        externalImports.push(node);
+                                        hasExportStarsToExportValues = true;
+                                    }
+                                }
+                                else if (resolver.isValueAliasDeclaration(node)) {
+                                    externalImports.push(node);
+                                }
+                            }
+                            else {
+                                for (var _c = 0, _d = node.exportClause.elements; _c < _d.length; _c++) {
+                                    var specifier = _d[_c];
+                                    var name_30 = (specifier.propertyName || specifier.name).text;
+                                    (exportSpecifiers[name_30] || (exportSpecifiers[name_30] = [])).push(specifier);
+                                }
+                            }
+                            break;
+                        case 235:
+                            if (node.isExportEquals && !exportEquals) {
+                                exportEquals = node;
+                            }
+                            break;
+                    }
+                }
+            }
+            function emitExportStarHelper() {
+                if (hasExportStarsToExportValues) {
+                    writeLine();
+                    write("function __export(m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function getLocalNameForExternalImport(node) {
+                var namespaceDeclaration = getNamespaceDeclarationNode(node);
+                if (namespaceDeclaration && !isDefaultImport(node)) {
+                    return ts.getTextOfNodeFromSourceText(currentText, namespaceDeclaration.name);
+                }
+                if (node.kind === 230 && node.importClause) {
+                    return getGeneratedNameForNode(node);
+                }
+                if (node.kind === 236 && node.moduleSpecifier) {
+                    return getGeneratedNameForNode(node);
+                }
+            }
+            function getExternalModuleNameText(importNode, emitRelativePathAsModuleName) {
+                if (emitRelativePathAsModuleName) {
+                    var name_31 = getExternalModuleNameFromDeclaration(host, resolver, importNode);
+                    if (name_31) {
+                        return "\"" + name_31 + "\"";
+                    }
+                }
+                var moduleName = ts.getExternalModuleName(importNode);
+                if (moduleName.kind === 9) {
+                    return tryRenameExternalModule(moduleName) || getLiteralText(moduleName);
+                }
+                return undefined;
+            }
+            function emitVariableDeclarationsForImports() {
+                if (externalImports.length === 0) {
+                    return;
+                }
+                writeLine();
+                var started = false;
+                for (var _a = 0, externalImports_1 = externalImports; _a < externalImports_1.length; _a++) {
+                    var importNode = externalImports_1[_a];
+                    var skipNode = importNode.kind === 236 ||
+                        (importNode.kind === 230 && !importNode.importClause);
+                    if (skipNode) {
+                        continue;
+                    }
+                    if (!started) {
+                        write("var ");
+                        started = true;
+                    }
+                    else {
+                        write(", ");
+                    }
+                    write(getLocalNameForExternalImport(importNode));
+                }
+                if (started) {
+                    write(";");
+                }
+            }
+            function emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations) {
+                if (!hasExportStarsToExportValues) {
+                    return undefined;
+                }
+                if (!exportedDeclarations && ts.isEmpty(exportSpecifiers)) {
+                    var hasExportDeclarationWithExportClause = false;
+                    for (var _a = 0, externalImports_2 = externalImports; _a < externalImports_2.length; _a++) {
+                        var externalImport = externalImports_2[_a];
+                        if (externalImport.kind === 236 && externalImport.exportClause) {
+                            hasExportDeclarationWithExportClause = true;
+                            break;
+                        }
+                    }
+                    if (!hasExportDeclarationWithExportClause) {
+                        return emitExportStarFunction(undefined);
+                    }
+                }
+                var exportedNamesStorageRef = makeUniqueName("exportedNames");
+                writeLine();
+                write("var " + exportedNamesStorageRef + " = {");
+                increaseIndent();
+                var started = false;
+                if (exportedDeclarations) {
+                    for (var i = 0; i < exportedDeclarations.length; i++) {
+                        writeExportedName(exportedDeclarations[i]);
+                    }
+                }
+                if (exportSpecifiers) {
+                    for (var n in exportSpecifiers) {
+                        for (var _b = 0, _c = exportSpecifiers[n]; _b < _c.length; _b++) {
+                            var specifier = _c[_b];
+                            writeExportedName(specifier.name);
+                        }
+                    }
+                }
+                for (var _d = 0, externalImports_3 = externalImports; _d < externalImports_3.length; _d++) {
+                    var externalImport = externalImports_3[_d];
+                    if (externalImport.kind !== 236) {
+                        continue;
+                    }
+                    var exportDecl = externalImport;
+                    if (!exportDecl.exportClause) {
+                        continue;
+                    }
+                    for (var _e = 0, _f = exportDecl.exportClause.elements; _e < _f.length; _e++) {
+                        var element = _f[_e];
+                        writeExportedName(element.name || element.propertyName);
+                    }
+                }
+                decreaseIndent();
+                writeLine();
+                write("};");
+                return emitExportStarFunction(exportedNamesStorageRef);
+                function emitExportStarFunction(localNames) {
+                    var exportStarFunction = makeUniqueName("exportStar");
+                    writeLine();
+                    write("function " + exportStarFunction + "(m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("var exports = {};");
+                    writeLine();
+                    write("for(var n in m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("if (n !== \"default\"");
+                    if (localNames) {
+                        write("&& !" + localNames + ".hasOwnProperty(n)");
+                    }
+                    write(") exports[n] = m[n];");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                    writeLine();
+                    write(exportFunctionForFile + "(exports);");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                    return exportStarFunction;
+                }
+                function writeExportedName(node) {
+                    if (node.kind !== 69 && node.flags & 512) {
+                        return;
+                    }
+                    if (started) {
+                        write(",");
+                    }
+                    else {
+                        started = true;
+                    }
+                    writeLine();
+                    write("'");
+                    if (node.kind === 69) {
+                        emitNodeWithCommentsAndWithoutSourcemap(node);
+                    }
+                    else {
+                        emitDeclarationName(node);
+                    }
+                    write("': true");
+                }
+            }
+            function processTopLevelVariableAndFunctionDeclarations(node) {
+                var hoistedVars;
+                var hoistedFunctionDeclarations;
+                var exportedDeclarations;
+                visit(node);
+                if (hoistedVars) {
+                    writeLine();
+                    write("var ");
+                    var seen = {};
+                    for (var i = 0; i < hoistedVars.length; i++) {
+                        var local = hoistedVars[i];
+                        var name_32 = local.kind === 69
+                            ? local
+                            : local.name;
+                        if (name_32) {
+                            var text = ts.unescapeIdentifier(name_32.text);
+                            if (ts.hasProperty(seen, text)) {
+                                continue;
+                            }
+                            else {
+                                seen[text] = text;
+                            }
+                        }
+                        if (i !== 0) {
+                            write(", ");
+                        }
+                        if (local.kind === 221 || local.kind === 225 || local.kind === 224) {
+                            emitDeclarationName(local);
+                        }
+                        else {
+                            emit(local);
+                        }
+                        var flags = ts.getCombinedNodeFlags(local.kind === 69 ? local.parent : local);
+                        if (flags & 1) {
+                            if (!exportedDeclarations) {
+                                exportedDeclarations = [];
+                            }
+                            exportedDeclarations.push(local);
+                        }
+                    }
+                    write(";");
+                }
+                if (hoistedFunctionDeclarations) {
+                    for (var _a = 0, hoistedFunctionDeclarations_1 = hoistedFunctionDeclarations; _a < hoistedFunctionDeclarations_1.length; _a++) {
+                        var f = hoistedFunctionDeclarations_1[_a];
+                        writeLine();
+                        emit(f);
+                        if (f.flags & 1) {
+                            if (!exportedDeclarations) {
+                                exportedDeclarations = [];
+                            }
+                            exportedDeclarations.push(f);
+                        }
+                    }
+                }
+                return exportedDeclarations;
+                function visit(node) {
+                    if (node.flags & 2) {
+                        return;
+                    }
+                    if (node.kind === 220) {
+                        if (!hoistedFunctionDeclarations) {
+                            hoistedFunctionDeclarations = [];
+                        }
+                        hoistedFunctionDeclarations.push(node);
+                        return;
+                    }
+                    if (node.kind === 221) {
+                        if (!hoistedVars) {
+                            hoistedVars = [];
+                        }
+                        hoistedVars.push(node);
+                        return;
+                    }
+                    if (node.kind === 224) {
+                        if (shouldEmitEnumDeclaration(node)) {
+                            if (!hoistedVars) {
+                                hoistedVars = [];
+                            }
+                            hoistedVars.push(node);
+                        }
+                        return;
+                    }
+                    if (node.kind === 225) {
+                        if (shouldEmitModuleDeclaration(node)) {
+                            if (!hoistedVars) {
+                                hoistedVars = [];
+                            }
+                            hoistedVars.push(node);
+                        }
+                        return;
+                    }
+                    if (node.kind === 218 || node.kind === 169) {
+                        if (shouldHoistVariable(node, false)) {
+                            var name_33 = node.name;
+                            if (name_33.kind === 69) {
+                                if (!hoistedVars) {
+                                    hoistedVars = [];
+                                }
+                                hoistedVars.push(name_33);
+                            }
+                            else {
+                                ts.forEachChild(name_33, visit);
+                            }
+                        }
+                        return;
+                    }
+                    if (ts.isInternalModuleImportEqualsDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
+                        if (!hoistedVars) {
+                            hoistedVars = [];
+                        }
+                        hoistedVars.push(node.name);
+                        return;
+                    }
+                    if (ts.isBindingPattern(node)) {
+                        ts.forEach(node.elements, visit);
+                        return;
+                    }
+                    if (!ts.isDeclaration(node)) {
+                        ts.forEachChild(node, visit);
+                    }
+                }
+            }
+            function shouldHoistVariable(node, checkIfSourceFileLevelDecl) {
+                if (checkIfSourceFileLevelDecl && !shouldHoistDeclarationInSystemJsModule(node)) {
+                    return false;
+                }
+                return (ts.getCombinedNodeFlags(node) & 3072) === 0 ||
+                    ts.getEnclosingBlockScopeContainer(node).kind === 256;
+            }
+            function isCurrentFileSystemExternalModule() {
+                return modulekind === ts.ModuleKind.System && isCurrentFileExternalModule;
+            }
+            function emitSystemModuleBody(node, dependencyGroups, startIndex) {
+                emitVariableDeclarationsForImports();
+                writeLine();
+                var exportedDeclarations = processTopLevelVariableAndFunctionDeclarations(node);
+                var exportStarFunction = emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations);
+                writeLine();
+                write("return {");
+                increaseIndent();
+                writeLine();
+                emitSetters(exportStarFunction, dependencyGroups);
+                writeLine();
+                emitExecute(node, startIndex);
+                decreaseIndent();
+                writeLine();
+                write("}");
+                emitTempDeclarations(true);
+            }
+            function emitSetters(exportStarFunction, dependencyGroups) {
+                write("setters:[");
+                for (var i = 0; i < dependencyGroups.length; i++) {
+                    if (i !== 0) {
+                        write(",");
+                    }
+                    writeLine();
+                    increaseIndent();
+                    var group = dependencyGroups[i];
+                    var parameterName = makeUniqueName(ts.forEach(group, getLocalNameForExternalImport) || "");
+                    write("function (" + parameterName + ") {");
+                    increaseIndent();
+                    for (var _a = 0, group_1 = group; _a < group_1.length; _a++) {
+                        var entry = group_1[_a];
+                        var importVariableName = getLocalNameForExternalImport(entry) || "";
+                        switch (entry.kind) {
+                            case 230:
+                                if (!entry.importClause) {
+                                    break;
+                                }
+                            case 229:
+                                ts.Debug.assert(importVariableName !== "");
+                                writeLine();
+                                write(importVariableName + " = " + parameterName + ";");
+                                writeLine();
+                                break;
+                            case 236:
+                                ts.Debug.assert(importVariableName !== "");
+                                if (entry.exportClause) {
+                                    writeLine();
+                                    write(exportFunctionForFile + "({");
+                                    writeLine();
+                                    increaseIndent();
+                                    for (var i_1 = 0, len = entry.exportClause.elements.length; i_1 < len; i_1++) {
+                                        if (i_1 !== 0) {
+                                            write(",");
+                                            writeLine();
+                                        }
+                                        var e = entry.exportClause.elements[i_1];
+                                        write("\"");
+                                        emitNodeWithCommentsAndWithoutSourcemap(e.name);
+                                        write("\": " + parameterName + "[\"");
+                                        emitNodeWithCommentsAndWithoutSourcemap(e.propertyName || e.name);
+                                        write("\"]");
+                                    }
+                                    decreaseIndent();
+                                    writeLine();
+                                    write("});");
+                                }
+                                else {
+                                    writeLine();
+                                    write(exportStarFunction + "(" + parameterName + ");");
+                                }
+                                writeLine();
+                                break;
+                        }
+                    }
+                    decreaseIndent();
+                    write("}");
+                    decreaseIndent();
+                }
+                write("],");
+            }
+            function emitExecute(node, startIndex) {
+                write("execute: function() {");
+                increaseIndent();
+                writeLine();
+                for (var i = startIndex; i < node.statements.length; i++) {
+                    var statement = node.statements[i];
+                    switch (statement.kind) {
+                        case 220:
+                        case 230:
+                            continue;
+                        case 236:
+                            if (!statement.moduleSpecifier) {
+                                for (var _a = 0, _b = statement.exportClause.elements; _a < _b.length; _a++) {
+                                    var element = _b[_a];
+                                    emitExportSpecifierInSystemModule(element);
+                                }
+                            }
+                            continue;
+                        case 229:
+                            if (!ts.isInternalModuleImportEqualsDeclaration(statement)) {
+                                continue;
+                            }
+                        default:
+                            writeLine();
+                            emit(statement);
+                    }
+                }
+                decreaseIndent();
+                writeLine();
+                write("}");
+            }
+            function writeModuleName(node, emitRelativePathAsModuleName) {
+                var moduleName = node.moduleName;
+                if (moduleName || (emitRelativePathAsModuleName && (moduleName = getResolvedExternalModuleName(host, node)))) {
+                    write("\"" + moduleName + "\", ");
+                }
+            }
+            function emitSystemModule(node, emitRelativePathAsModuleName) {
+                collectExternalModuleInfo(node);
+                ts.Debug.assert(!exportFunctionForFile);
+                exportFunctionForFile = makeUniqueName("exports");
+                contextObjectForFile = makeUniqueName("context");
+                writeLine();
+                write("System.register(");
+                writeModuleName(node, emitRelativePathAsModuleName);
+                write("[");
+                var groupIndices = {};
+                var dependencyGroups = [];
+                for (var i = 0; i < externalImports.length; i++) {
+                    var text = getExternalModuleNameText(externalImports[i], emitRelativePathAsModuleName);
+                    if (text === undefined) {
+                        continue;
+                    }
+                    var key = text.substr(1, text.length - 2);
+                    if (ts.hasProperty(groupIndices, key)) {
+                        var groupIndex = groupIndices[key];
+                        dependencyGroups[groupIndex].push(externalImports[i]);
+                        continue;
+                    }
+                    else {
+                        groupIndices[key] = dependencyGroups.length;
+                        dependencyGroups.push([externalImports[i]]);
+                    }
+                    if (i !== 0) {
+                        write(", ");
+                    }
+                    write(text);
+                }
+                write("], function(" + exportFunctionForFile + ", " + contextObjectForFile + ") {");
+                writeLine();
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
+                writeLine();
+                write("var __moduleName = " + contextObjectForFile + " && " + contextObjectForFile + ".id;");
+                writeLine();
+                emitEmitHelpers(node);
+                emitCaptureThisForNodeIfNecessary(node);
+                emitSystemModuleBody(node, dependencyGroups, startIndex);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
+                var aliasedModuleNames = [];
+                var unaliasedModuleNames = [];
+                var importAliasNames = [];
+                for (var _a = 0, _b = node.amdDependencies; _a < _b.length; _a++) {
+                    var amdDependency = _b[_a];
+                    if (amdDependency.name) {
+                        aliasedModuleNames.push('"' + amdDependency.path + '"');
+                        importAliasNames.push(amdDependency.name);
+                    }
+                    else {
+                        unaliasedModuleNames.push('"' + amdDependency.path + '"');
+                    }
+                }
+                for (var _c = 0, externalImports_4 = externalImports; _c < externalImports_4.length; _c++) {
+                    var importNode = externalImports_4[_c];
+                    var externalModuleName = getExternalModuleNameText(importNode, emitRelativePathAsModuleName);
+                    var importAliasName = getLocalNameForExternalImport(importNode);
+                    if (includeNonAmdDependencies && importAliasName) {
+                        aliasedModuleNames.push(externalModuleName);
+                        importAliasNames.push(importAliasName);
+                    }
+                    else {
+                        unaliasedModuleNames.push(externalModuleName);
+                    }
+                }
+                return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
+            }
+            function emitAMDDependencies(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
+                var dependencyNames = getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName);
+                emitAMDDependencyList(dependencyNames);
+                write(", ");
+                emitAMDFactoryHeader(dependencyNames);
+            }
+            function emitAMDDependencyList(_a) {
+                var aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames;
+                write('["require", "exports"');
+                if (aliasedModuleNames.length) {
+                    write(", ");
+                    write(aliasedModuleNames.join(", "));
+                }
+                if (unaliasedModuleNames.length) {
+                    write(", ");
+                    write(unaliasedModuleNames.join(", "));
+                }
+                write("]");
+            }
+            function emitAMDFactoryHeader(_a) {
+                var importAliasNames = _a.importAliasNames;
+                write("function (require, exports");
+                if (importAliasNames.length) {
+                    write(", ");
+                    write(importAliasNames.join(", "));
+                }
+                write(") {");
+            }
+            function emitAMDModule(node, emitRelativePathAsModuleName) {
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                writeLine();
+                write("define(");
+                writeModuleName(node, emitRelativePathAsModuleName);
+                emitAMDDependencies(node, true, emitRelativePathAsModuleName);
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(true);
+                emitTempDeclarations(true);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function emitCommonJSModule(node) {
+                var startIndex = emitDirectivePrologues(node.statements, false, !compilerOptions.noImplicitUseStrict);
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(false);
+                emitTempDeclarations(true);
+            }
+            function emitUMDModule(node) {
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                var dependencyNames = getAMDDependencyNames(node, false);
+                writeLines("(function (factory) {\n    if (typeof module === 'object' && typeof module.exports === 'object') {\n        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n    }\n    else if (typeof define === 'function' && define.amd) {\n        define(");
+                emitAMDDependencyList(dependencyNames);
+                write(", factory);");
+                writeLines("    }\n})(");
+                emitAMDFactoryHeader(dependencyNames);
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, true, !compilerOptions.noImplicitUseStrict);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(true);
+                emitTempDeclarations(true);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function emitES6Module(node) {
+                externalImports = undefined;
+                exportSpecifiers = undefined;
+                exportEquals = undefined;
+                hasExportStarsToExportValues = false;
+                var startIndex = emitDirectivePrologues(node.statements, false);
+                emitEmitHelpers(node);
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitTempDeclarations(true);
+            }
+            function emitExportEquals(emitAsReturn) {
+                if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) {
+                    writeLine();
+                    emitStart(exportEquals);
+                    write(emitAsReturn ? "return " : "module.exports = ");
+                    emit(exportEquals.expression);
+                    write(";");
+                    emitEnd(exportEquals);
+                }
+            }
+            function emitJsxElement(node) {
+                switch (compilerOptions.jsx) {
+                    case 2:
+                        jsxEmitReact(node);
+                        break;
+                    case 1:
+                    default:
+                        jsxEmitPreserve(node);
+                        break;
+                }
+            }
+            function trimReactWhitespaceAndApplyEntities(node) {
+                var result = undefined;
+                var text = ts.getTextOfNode(node, true);
+                var firstNonWhitespace = 0;
+                var lastNonWhitespace = -1;
+                for (var i = 0; i < text.length; i++) {
+                    var c = text.charCodeAt(i);
+                    if (ts.isLineBreak(c)) {
+                        if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) {
+                            var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1);
+                            result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
+                        }
+                        firstNonWhitespace = -1;
+                    }
+                    else if (!ts.isWhiteSpace(c)) {
+                        lastNonWhitespace = i;
+                        if (firstNonWhitespace === -1) {
+                            firstNonWhitespace = i;
+                        }
+                    }
+                }
+                if (firstNonWhitespace !== -1) {
+                    var part = text.substr(firstNonWhitespace);
+                    result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
+                }
+                if (result) {
+                    result = result.replace(/&(\w+);/g, function (s, m) {
+                        if (entities[m] !== undefined) {
+                            var ch = String.fromCharCode(entities[m]);
+                            return ch === '"' ? "\\\"" : ch;
+                        }
+                        else {
+                            return s;
+                        }
+                    });
+                }
+                return result;
+            }
+            function isJsxChildEmittable(child) {
+                if (child.kind === 248) {
+                    return !!child.expression;
+                }
+                else if (child.kind === 244) {
+                    return !!getTextToEmit(child);
+                }
+                return true;
+            }
+            ;
+            function getTextToEmit(node) {
+                switch (compilerOptions.jsx) {
+                    case 2:
+                        var text = trimReactWhitespaceAndApplyEntities(node);
+                        if (text === undefined || text.length === 0) {
+                            return undefined;
+                        }
+                        else {
+                            return text;
+                        }
+                    case 1:
+                    default:
+                        return ts.getTextOfNode(node, true);
+                }
+            }
+            function emitJsxText(node) {
+                switch (compilerOptions.jsx) {
+                    case 2:
+                        write('"');
+                        write(trimReactWhitespaceAndApplyEntities(node));
+                        write('"');
+                        break;
+                    case 1:
+                    default:
+                        writer.writeLiteral(ts.getTextOfNode(node, true));
+                        break;
+                }
+            }
+            function emitJsxExpression(node) {
+                if (node.expression) {
+                    switch (compilerOptions.jsx) {
+                        case 1:
+                        default:
+                            write("{");
+                            emit(node.expression);
+                            write("}");
+                            break;
+                        case 2:
+                            emit(node.expression);
+                            break;
+                    }
+                }
+            }
+            function isUseStrictPrologue(node) {
+                return node.expression.text === "use strict";
+            }
+            function ensureUseStrictPrologue(startWithNewLine, writeUseStrict) {
+                if (writeUseStrict) {
+                    if (startWithNewLine) {
+                        writeLine();
+                    }
+                    write("\"use strict\";");
+                }
+            }
+            function emitDirectivePrologues(statements, startWithNewLine, ensureUseStrict) {
+                var foundUseStrict = false;
+                for (var i = 0; i < statements.length; i++) {
+                    if (ts.isPrologueDirective(statements[i])) {
+                        if (isUseStrictPrologue(statements[i])) {
+                            foundUseStrict = true;
+                        }
+                        if (startWithNewLine || i > 0) {
+                            writeLine();
+                        }
+                        emit(statements[i]);
+                    }
+                    else {
+                        ensureUseStrictPrologue(startWithNewLine || i > 0, !foundUseStrict && ensureUseStrict);
+                        return i;
+                    }
+                }
+                ensureUseStrictPrologue(startWithNewLine, !foundUseStrict && ensureUseStrict);
+                return statements.length;
+            }
+            function writeLines(text) {
+                var lines = text.split(/\r\n|\r|\n/g);
+                for (var i = 0; i < lines.length; i++) {
+                    var line = lines[i];
+                    if (line.length) {
+                        writeLine();
+                        write(line);
+                    }
+                }
+            }
+            function emitEmitHelpers(node) {
+                if (!compilerOptions.noEmitHelpers) {
+                    if (languageVersion < 2 && !extendsEmitted && node.flags & 262144) {
+                        writeLines(extendsHelper);
+                        extendsEmitted = true;
+                    }
+                    if (compilerOptions.jsx !== 1 && !assignEmitted && (node.flags & 1073741824)) {
+                        writeLines(assignHelper);
+                        assignEmitted = true;
+                    }
+                    if (!decorateEmitted && node.flags & 524288) {
+                        writeLines(decorateHelper);
+                        if (compilerOptions.emitDecoratorMetadata) {
+                            writeLines(metadataHelper);
+                        }
+                        decorateEmitted = true;
+                    }
+                    if (!paramEmitted && node.flags & 1048576) {
+                        writeLines(paramHelper);
+                        paramEmitted = true;
+                    }
+                    if (!awaiterEmitted && node.flags & 2097152) {
+                        writeLines(awaiterHelper);
+                        awaiterEmitted = true;
+                    }
+                }
+            }
+            function emitSourceFileNode(node) {
+                writeLine();
+                emitShebang();
+                emitDetachedCommentsAndUpdateCommentsInfo(node);
+                if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
+                    if (isOwnFileEmit || (!ts.isExternalModule(node) && compilerOptions.isolatedModules)) {
+                        var emitModule = moduleEmitDelegates[modulekind] || moduleEmitDelegates[ts.ModuleKind.CommonJS];
+                        emitModule(node);
+                    }
+                    else {
+                        bundleEmitDelegates[modulekind](node, true);
+                    }
+                }
+                else {
+                    var startIndex = emitDirectivePrologues(node.statements, false);
+                    externalImports = undefined;
+                    exportSpecifiers = undefined;
+                    exportEquals = undefined;
+                    hasExportStarsToExportValues = false;
+                    emitEmitHelpers(node);
+                    emitCaptureThisForNodeIfNecessary(node);
+                    emitLinesStartingAt(node.statements, startIndex);
+                    emitTempDeclarations(true);
+                }
+                emitLeadingComments(node.endOfFileToken);
+            }
+            function emit(node) {
+                emitNodeConsideringCommentsOption(node, emitNodeWithSourceMap);
+            }
+            function emitNodeWithCommentsAndWithoutSourcemap(node) {
+                emitNodeConsideringCommentsOption(node, emitNodeWithoutSourceMap);
+            }
+            function emitNodeConsideringCommentsOption(node, emitNodeConsideringSourcemap) {
+                if (node) {
+                    if (node.flags & 2) {
+                        return emitCommentsOnNotEmittedNode(node);
+                    }
+                    if (isSpecializedCommentHandling(node)) {
+                        return emitNodeWithoutSourceMap(node);
+                    }
+                    var emitComments_1 = shouldEmitLeadingAndTrailingComments(node);
+                    if (emitComments_1) {
+                        emitLeadingComments(node);
+                    }
+                    emitNodeConsideringSourcemap(node);
+                    if (emitComments_1) {
+                        emitTrailingComments(node);
+                    }
+                }
+            }
+            function emitNodeWithSourceMap(node) {
+                if (node) {
+                    emitStart(node);
+                    emitNodeWithoutSourceMap(node);
+                    emitEnd(node);
+                }
+            }
+            function emitNodeWithoutSourceMap(node) {
+                if (node) {
+                    emitJavaScriptWorker(node);
+                }
+            }
+            function changeSourceMapEmit(writer) {
+                sourceMap = writer;
+                emitStart = writer.emitStart;
+                emitEnd = writer.emitEnd;
+                emitPos = writer.emitPos;
+                setSourceFile = writer.setSourceFile;
+            }
+            function withTemporaryNoSourceMap(callback) {
+                var prevSourceMap = sourceMap;
+                setSourceMapWriterEmit(ts.getNullSourceMapWriter());
+                callback();
+                setSourceMapWriterEmit(prevSourceMap);
+            }
+            function isSpecializedCommentHandling(node) {
+                switch (node.kind) {
+                    case 222:
+                    case 220:
+                    case 230:
+                    case 229:
+                    case 223:
+                    case 235:
+                        return true;
+                }
+            }
+            function shouldEmitLeadingAndTrailingComments(node) {
+                switch (node.kind) {
+                    case 200:
+                        return shouldEmitLeadingAndTrailingCommentsForVariableStatement(node);
+                    case 225:
+                        return shouldEmitModuleDeclaration(node);
+                    case 224:
+                        return shouldEmitEnumDeclaration(node);
+                }
+                ts.Debug.assert(!isSpecializedCommentHandling(node));
+                if (node.kind !== 199 &&
+                    node.parent &&
+                    node.parent.kind === 180 &&
+                    node.parent.body === node &&
+                    languageVersion <= 1) {
+                    return false;
+                }
+                return true;
+            }
+            function emitJavaScriptWorker(node) {
+                switch (node.kind) {
+                    case 69:
+                        return emitIdentifier(node);
+                    case 142:
+                        return emitParameter(node);
+                    case 147:
+                    case 146:
+                        return emitMethod(node);
+                    case 149:
+                    case 150:
+                        return emitAccessor(node);
+                    case 97:
+                        return emitThis(node);
+                    case 95:
+                        return emitSuper(node);
+                    case 93:
+                        return write("null");
+                    case 99:
+                        return write("true");
+                    case 84:
+                        return write("false");
+                    case 8:
+                    case 9:
+                    case 10:
+                    case 11:
+                    case 12:
+                    case 13:
+                    case 14:
+                        return emitLiteral(node);
+                    case 189:
+                        return emitTemplateExpression(node);
+                    case 197:
+                        return emitTemplateSpan(node);
+                    case 241:
+                    case 242:
+                        return emitJsxElement(node);
+                    case 244:
+                        return emitJsxText(node);
+                    case 248:
+                        return emitJsxExpression(node);
+                    case 139:
+                        return emitQualifiedName(node);
+                    case 167:
+                        return emitObjectBindingPattern(node);
+                    case 168:
+                        return emitArrayBindingPattern(node);
+                    case 169:
+                        return emitBindingElement(node);
+                    case 170:
+                        return emitArrayLiteral(node);
+                    case 171:
+                        return emitObjectLiteral(node);
+                    case 253:
+                        return emitPropertyAssignment(node);
+                    case 254:
+                        return emitShorthandPropertyAssignment(node);
+                    case 140:
+                        return emitComputedPropertyName(node);
+                    case 172:
+                        return emitPropertyAccess(node);
+                    case 173:
+                        return emitIndexedAccess(node);
+                    case 174:
+                        return emitCallExpression(node);
+                    case 175:
+                        return emitNewExpression(node);
+                    case 176:
+                        return emitTaggedTemplateExpression(node);
+                    case 177:
+                    case 195:
+                    case 196:
+                        return emit(node.expression);
+                    case 178:
+                        return emitParenExpression(node);
+                    case 220:
+                    case 179:
+                    case 180:
+                        return emitFunctionDeclaration(node);
+                    case 181:
+                        return emitDeleteExpression(node);
+                    case 182:
+                        return emitTypeOfExpression(node);
+                    case 183:
+                        return emitVoidExpression(node);
+                    case 184:
+                        return emitAwaitExpression(node);
+                    case 185:
+                        return emitPrefixUnaryExpression(node);
+                    case 186:
+                        return emitPostfixUnaryExpression(node);
+                    case 187:
+                        return emitBinaryExpression(node);
+                    case 188:
+                        return emitConditionalExpression(node);
+                    case 191:
+                        return emitSpreadElementExpression(node);
+                    case 190:
+                        return emitYieldExpression(node);
+                    case 193:
+                        return;
+                    case 199:
+                    case 226:
+                        return emitBlock(node);
+                    case 200:
+                        return emitVariableStatement(node);
+                    case 201:
+                        return write(";");
+                    case 202:
+                        return emitExpressionStatement(node);
+                    case 203:
+                        return emitIfStatement(node);
+                    case 204:
+                        return emitDoStatement(node);
+                    case 205:
+                        return emitWhileStatement(node);
+                    case 206:
+                        return emitForStatement(node);
+                    case 208:
+                    case 207:
+                        return emitForInOrForOfStatement(node);
+                    case 209:
+                    case 210:
+                        return emitBreakOrContinueStatement(node);
+                    case 211:
+                        return emitReturnStatement(node);
+                    case 212:
+                        return emitWithStatement(node);
+                    case 213:
+                        return emitSwitchStatement(node);
+                    case 249:
+                    case 250:
+                        return emitCaseOrDefaultClause(node);
+                    case 214:
+                        return emitLabeledStatement(node);
+                    case 215:
+                        return emitThrowStatement(node);
+                    case 216:
+                        return emitTryStatement(node);
+                    case 252:
+                        return emitCatchClause(node);
+                    case 217:
+                        return emitDebuggerStatement(node);
+                    case 218:
+                        return emitVariableDeclaration(node);
+                    case 192:
+                        return emitClassExpression(node);
+                    case 221:
+                        return emitClassDeclaration(node);
+                    case 222:
+                        return emitInterfaceDeclaration(node);
+                    case 224:
+                        return emitEnumDeclaration(node);
+                    case 255:
+                        return emitEnumMember(node);
+                    case 225:
+                        return emitModuleDeclaration(node);
+                    case 230:
+                        return emitImportDeclaration(node);
+                    case 229:
+                        return emitImportEqualsDeclaration(node);
+                    case 236:
+                        return emitExportDeclaration(node);
+                    case 235:
+                        return emitExportAssignment(node);
+                    case 256:
+                        return emitSourceFileNode(node);
+                }
+            }
+            function hasDetachedComments(pos) {
+                return detachedCommentsInfo !== undefined && ts.lastOrUndefined(detachedCommentsInfo).nodePos === pos;
+            }
+            function getLeadingCommentsWithoutDetachedComments() {
+                var leadingComments = ts.getLeadingCommentRanges(currentText, ts.lastOrUndefined(detachedCommentsInfo).detachedCommentEndPos);
+                if (detachedCommentsInfo.length - 1) {
+                    detachedCommentsInfo.pop();
+                }
+                else {
+                    detachedCommentsInfo = undefined;
+                }
+                return leadingComments;
+            }
+            function isTripleSlashComment(comment) {
+                if (currentText.charCodeAt(comment.pos + 1) === 47 &&
+                    comment.pos + 2 < comment.end &&
+                    currentText.charCodeAt(comment.pos + 2) === 47) {
+                    var textSubStr = currentText.substring(comment.pos, comment.end);
+                    return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) ||
+                        textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ?
+                        true : false;
+                }
+                return false;
+            }
+            function getLeadingCommentsToEmit(node) {
+                if (node.parent) {
+                    if (node.parent.kind === 256 || node.pos !== node.parent.pos) {
+                        if (hasDetachedComments(node.pos)) {
+                            return getLeadingCommentsWithoutDetachedComments();
+                        }
+                        else {
+                            return ts.getLeadingCommentRangesOfNodeFromText(node, currentText);
+                        }
+                    }
+                }
+            }
+            function getTrailingCommentsToEmit(node) {
+                if (node.parent) {
+                    if (node.parent.kind === 256 || node.end !== node.parent.end) {
+                        return ts.getTrailingCommentRanges(currentText, node.end);
+                    }
+                }
+            }
+            function emitCommentsOnNotEmittedNode(node) {
+                emitLeadingCommentsWorker(node, false);
+            }
+            function emitLeadingComments(node) {
+                return emitLeadingCommentsWorker(node, true);
+            }
+            function emitLeadingCommentsWorker(node, isEmittedNode) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var leadingComments;
+                if (isEmittedNode) {
+                    leadingComments = getLeadingCommentsToEmit(node);
+                }
+                else {
+                    if (node.pos === 0) {
+                        leadingComments = ts.filter(getLeadingCommentsToEmit(node), isTripleSlashComment);
+                    }
+                }
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, node, leadingComments);
+                ts.emitComments(currentText, currentLineMap, writer, leadingComments, true, newLine, writeComment);
+            }
+            function emitTrailingComments(node) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var trailingComments = getTrailingCommentsToEmit(node);
+                ts.emitComments(currentText, currentLineMap, writer, trailingComments, false, newLine, writeComment);
+            }
+            function emitTrailingCommentsOfPosition(pos) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var trailingComments = ts.getTrailingCommentRanges(currentText, pos);
+                ts.emitComments(currentText, currentLineMap, writer, trailingComments, true, newLine, writeComment);
+            }
+            function emitLeadingCommentsOfPositionWorker(pos) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var leadingComments;
+                if (hasDetachedComments(pos)) {
+                    leadingComments = getLeadingCommentsWithoutDetachedComments();
+                }
+                else {
+                    leadingComments = ts.getLeadingCommentRanges(currentText, pos);
+                }
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, { pos: pos, end: pos }, leadingComments);
+                ts.emitComments(currentText, currentLineMap, writer, leadingComments, true, newLine, writeComment);
+            }
+            function emitDetachedCommentsAndUpdateCommentsInfo(node) {
+                var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, node, newLine, compilerOptions.removeComments);
+                if (currentDetachedCommentInfo) {
+                    if (detachedCommentsInfo) {
+                        detachedCommentsInfo.push(currentDetachedCommentInfo);
+                    }
+                    else {
+                        detachedCommentsInfo = [currentDetachedCommentInfo];
+                    }
+                }
+            }
+            function writeComment(text, lineMap, writer, comment, newLine) {
+                emitPos(comment.pos);
+                ts.writeCommentRange(text, lineMap, writer, comment, newLine);
+                emitPos(comment.end);
+            }
+            function emitShebang() {
+                var shebang = ts.getShebang(currentText);
+                if (shebang) {
+                    write(shebang);
+                    writeLine();
+                }
+            }
+            var _a, _b;
+        }
+        function emitFile(_a, sourceFiles, isBundledEmit) {
+            var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath;
+            if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
+                emitJavaScript(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
+            }
+            else {
+                emitSkipped = true;
+            }
+            if (declarationFilePath) {
+                emitSkipped = ts.writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) || emitSkipped;
+            }
+            if (!emitSkipped && emittedFilesList) {
+                emittedFilesList.push(jsFilePath);
+                if (sourceMapFilePath) {
+                    emittedFilesList.push(sourceMapFilePath);
+                }
+                if (declarationFilePath) {
+                    emittedFilesList.push(declarationFilePath);
+                }
+            }
+        }
+    }
+    ts.emitFiles = emitFiles;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.programTime = 0;
+    ts.emitTime = 0;
+    ts.ioReadTime = 0;
+    ts.ioWriteTime = 0;
+    var emptyArray = [];
+    var defaultLibrarySearchPaths = [
+        "types/",
+        "node_modules/",
+        "node_modules/@types/",
+    ];
+    ts.version = "1.9.0";
+    function findConfigFile(searchPath, fileExists) {
+        while (true) {
+            var fileName = ts.combinePaths(searchPath, "tsconfig.json");
+            if (fileExists(fileName)) {
+                return fileName;
+            }
+            var parentPath = ts.getDirectoryPath(searchPath);
+            if (parentPath === searchPath) {
+                break;
+            }
+            searchPath = parentPath;
+        }
+        return undefined;
+    }
+    ts.findConfigFile = findConfigFile;
+    function resolveTripleslashReference(moduleName, containingFile) {
+        var basePath = ts.getDirectoryPath(containingFile);
+        var referencedFileName = ts.isRootedDiskPath(moduleName) ? moduleName : ts.combinePaths(basePath, moduleName);
+        return ts.normalizePath(referencedFileName);
+    }
+    ts.resolveTripleslashReference = resolveTripleslashReference;
+    function computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName) {
+        var commonPathComponents;
+        var failed = ts.forEach(fileNames, function (sourceFile) {
+            var sourcePathComponents = ts.getNormalizedPathComponents(sourceFile, currentDirectory);
+            sourcePathComponents.pop();
+            if (!commonPathComponents) {
+                commonPathComponents = sourcePathComponents;
+                return;
+            }
+            for (var i = 0, n = Math.min(commonPathComponents.length, sourcePathComponents.length); i < n; i++) {
+                if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
+                    if (i === 0) {
+                        return true;
+                    }
+                    commonPathComponents.length = i;
+                    break;
+                }
+            }
+            if (sourcePathComponents.length < commonPathComponents.length) {
+                commonPathComponents.length = sourcePathComponents.length;
+            }
+        });
+        if (failed) {
+            return "";
+        }
+        if (!commonPathComponents) {
+            return currentDirectory;
+        }
+        return ts.getNormalizedPathFromPathComponents(commonPathComponents);
+    }
+    ts.computeCommonSourceDirectoryOfFilenames = computeCommonSourceDirectoryOfFilenames;
+    function trace(host, message) {
+        host.trace(ts.formatMessage.apply(undefined, arguments));
+    }
+    function isTraceEnabled(compilerOptions, host) {
+        return compilerOptions.traceResolution && host.trace !== undefined;
+    }
+    function hasZeroOrOneAsteriskCharacter(str) {
+        var seenAsterisk = false;
+        for (var i = 0; i < str.length; i++) {
+            if (str.charCodeAt(i) === 42) {
+                if (!seenAsterisk) {
+                    seenAsterisk = true;
+                }
+                else {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+    ts.hasZeroOrOneAsteriskCharacter = hasZeroOrOneAsteriskCharacter;
+    function createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations) {
+        return { resolvedModule: resolvedFileName ? { resolvedFileName: resolvedFileName, isExternalLibraryImport: isExternalLibraryImport } : undefined, failedLookupLocations: failedLookupLocations };
+    }
+    function moduleHasNonRelativeName(moduleName) {
+        if (ts.isRootedDiskPath(moduleName)) {
+            return false;
+        }
+        var i = moduleName.lastIndexOf("./", 1);
+        var startsWithDotSlashOrDotDotSlash = i === 0 || (i === 1 && moduleName.charCodeAt(0) === 46);
+        return !startsWithDotSlashOrDotDotSlash;
+    }
+    function tryReadTypesSection(packageJsonPath, baseDirectory, state) {
+        var jsonContent;
+        try {
+            var jsonText = state.host.readFile(packageJsonPath);
+            jsonContent = jsonText ? JSON.parse(jsonText) : {};
+        }
+        catch (e) {
+            jsonContent = {};
+        }
+        var typesFile;
+        var fieldName;
+        if (jsonContent.typings) {
+            if (typeof jsonContent.typings === "string") {
+                fieldName = "typings";
+                typesFile = jsonContent.typings;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "typings", typeof jsonContent.typings);
+                }
+            }
+        }
+        if (!typesFile && jsonContent.types) {
+            if (typeof jsonContent.types === "string") {
+                fieldName = "types";
+                typesFile = jsonContent.types;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "types", typeof jsonContent.types);
+                }
+            }
+        }
+        if (typesFile) {
+            var typesFilePath = ts.normalizePath(ts.combinePaths(baseDirectory, typesFile));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, typesFile, typesFilePath);
+            }
+            return typesFilePath;
+        }
+        return undefined;
+    }
+    var typeReferenceExtensions = [".d.ts"];
+    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
+        var traceEnabled = isTraceEnabled(options, host);
+        var moduleResolutionState = {
+            compilerOptions: options,
+            host: host,
+            skipTsx: true,
+            traceEnabled: traceEnabled
+        };
+        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
+        if (traceEnabled) {
+            if (containingFile === undefined) {
+                if (rootDir === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, rootDir);
+                }
+            }
+            else {
+                if (rootDir === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, rootDir);
+                }
+            }
+        }
+        var failedLookupLocations = [];
+        if (rootDir !== undefined) {
+            var effectivePrimarySearchPaths = options.typesSearchPaths || defaultLibrarySearchPaths;
+            for (var _i = 0, effectivePrimarySearchPaths_1 = effectivePrimarySearchPaths; _i < effectivePrimarySearchPaths_1.length; _i++) {
+                var searchPath = effectivePrimarySearchPaths_1[_i];
+                var primaryPath = ts.combinePaths(rootDir, searchPath);
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, primaryPath);
+                }
+                var candidate = ts.combinePaths(primaryPath, typeReferenceDirectiveName);
+                var candidateDirectory = ts.getDirectoryPath(candidate);
+                var resolvedFile_1 = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations, !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
+                if (resolvedFile_1) {
+                    if (traceEnabled) {
+                        trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile_1, true);
+                    }
+                    return {
+                        resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile_1 },
+                        failedLookupLocations: failedLookupLocations
+                    };
+                }
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
+            }
+        }
+        var resolvedFile;
+        var initialLocationForSecondaryLookup;
+        if (containingFile) {
+            initialLocationForSecondaryLookup = ts.getDirectoryPath(containingFile);
+        }
+        else {
+            initialLocationForSecondaryLookup = rootDir;
+        }
+        if (initialLocationForSecondaryLookup !== undefined) {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
+            }
+            resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState);
+            if (traceEnabled) {
+                if (resolvedFile) {
+                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
+                }
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
+            }
+        }
+        return {
+            resolvedTypeReferenceDirective: resolvedFile
+                ? { primary: false, resolvedFileName: resolvedFile }
+                : undefined,
+            failedLookupLocations: failedLookupLocations
+        };
+    }
+    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
+    function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        if (traceEnabled) {
+            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
+        }
+        var moduleResolution = compilerOptions.moduleResolution;
+        if (moduleResolution === undefined) {
+            moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
+            }
+        }
+        var result;
+        switch (moduleResolution) {
+            case ts.ModuleResolutionKind.NodeJs:
+                result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
+                break;
+            case ts.ModuleResolutionKind.Classic:
+                result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
+                break;
+        }
+        if (traceEnabled) {
+            if (result.resolvedModule) {
+                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
+            }
+            else {
+                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
+            }
+        }
+        return result;
+    }
+    ts.resolveModuleName = resolveModuleName;
+    function tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
+        if (moduleHasNonRelativeName(moduleName)) {
+            return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
+        }
+        else {
+            return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
+        }
+    }
+    function tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
+        if (!state.compilerOptions.rootDirs) {
+            return undefined;
+        }
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
+        }
+        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+        var matchedRootDir;
+        var matchedNormalizedPrefix;
+        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
+            var rootDir = _a[_i];
+            var normalizedRoot = ts.normalizePath(rootDir);
+            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
+                normalizedRoot += ts.directorySeparator;
+            }
+            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
+                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
+            }
+            if (isLongestMatchingPrefix) {
+                matchedNormalizedPrefix = normalizedRoot;
+                matchedRootDir = rootDir;
+            }
+        }
+        if (matchedNormalizedPrefix) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
+            }
+            var suffix = candidate.substr(matchedNormalizedPrefix.length);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
+            }
+            var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
+            if (resolvedFileName) {
+                return resolvedFileName;
+            }
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
+            }
+            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
+                var rootDir = _c[_b];
+                if (rootDir === matchedRootDir) {
+                    continue;
+                }
+                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
+                }
+                var baseDirectory = ts.getDirectoryPath(candidate_1);
+                var resolvedFileName_1 = loader(candidate_1, supportedExtensions, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
+                if (resolvedFileName_1) {
+                    return resolvedFileName_1;
+                }
+            }
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
+            }
+        }
+        return undefined;
+    }
+    function tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state) {
+        if (!state.compilerOptions.baseUrl) {
+            return undefined;
+        }
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
+        }
+        var matchedPattern = undefined;
+        if (state.compilerOptions.paths) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
+            }
+            matchedPattern = matchPatternOrExact(ts.getKeys(state.compilerOptions.paths), moduleName);
+        }
+        if (matchedPattern) {
+            var matchedStar = typeof matchedPattern === "string" ? undefined : matchedText(matchedPattern, moduleName);
+            var matchedPatternText = typeof matchedPattern === "string" ? matchedPattern : patternText(matchedPattern);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPatternText);
+            }
+            for (var _i = 0, _a = state.compilerOptions.paths[matchedPatternText]; _i < _a.length; _i++) {
+                var subst = _a[_i];
+                var path = matchedStar ? subst.replace("*", matchedStar) : subst;
+                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
+                }
+                var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+                if (resolvedFileName) {
+                    return resolvedFileName;
+                }
+            }
+            return undefined;
+        }
+        else {
+            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
+            }
+            return loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+        }
+    }
+    function matchPatternOrExact(patternStrings, candidate) {
+        var patterns = [];
+        for (var _i = 0, patternStrings_1 = patternStrings; _i < patternStrings_1.length; _i++) {
+            var patternString = patternStrings_1[_i];
+            var pattern = tryParsePattern(patternString);
+            if (pattern) {
+                patterns.push(pattern);
+            }
+            else if (patternString === candidate) {
+                return patternString;
+            }
+        }
+        return findBestPatternMatch(patterns, function (_) { return _; }, candidate);
+    }
+    function patternText(_a) {
+        var prefix = _a.prefix, suffix = _a.suffix;
+        return prefix + "*" + suffix;
+    }
+    function matchedText(pattern, candidate) {
+        ts.Debug.assert(isPatternMatch(pattern, candidate));
+        return candidate.substr(pattern.prefix.length, candidate.length - pattern.suffix.length);
+    }
+    function findBestPatternMatch(values, getPattern, candidate) {
+        var matchedValue = undefined;
+        var longestMatchPrefixLength = -1;
+        for (var _i = 0, values_1 = values; _i < values_1.length; _i++) {
+            var v = values_1[_i];
+            var pattern = getPattern(v);
+            if (isPatternMatch(pattern, candidate) && pattern.prefix.length > longestMatchPrefixLength) {
+                longestMatchPrefixLength = pattern.prefix.length;
+                matchedValue = v;
+            }
+        }
+        return matchedValue;
+    }
+    ts.findBestPatternMatch = findBestPatternMatch;
+    function isPatternMatch(_a, candidate) {
+        var prefix = _a.prefix, suffix = _a.suffix;
+        return candidate.length >= prefix.length + suffix.length &&
+            ts.startsWith(candidate, prefix) &&
+            ts.endsWith(candidate, suffix);
+    }
+    function tryParsePattern(pattern) {
+        ts.Debug.assert(hasZeroOrOneAsteriskCharacter(pattern));
+        var indexOfStar = pattern.indexOf("*");
+        return indexOfStar === -1 ? undefined : {
+            prefix: pattern.substr(0, indexOfStar),
+            suffix: pattern.substr(indexOfStar + 1)
+        };
+    }
+    ts.tryParsePattern = tryParsePattern;
+    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host) {
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var failedLookupLocations = [];
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: false };
+        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName, failedLookupLocations, supportedExtensions, state);
+        var isExternalLibraryImport = false;
+        if (!resolvedFileName) {
+            if (moduleHasNonRelativeName(moduleName)) {
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
+                }
+                resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state);
+                isExternalLibraryImport = resolvedFileName !== undefined;
+            }
+            else {
+                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, false, state);
+            }
+        }
+        if (resolvedFileName && host.realpath) {
+            var originalFileName = resolvedFileName;
+            resolvedFileName = ts.normalizePath(host.realpath(resolvedFileName));
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
+            }
+        }
+        return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
+    }
+    ts.nodeModuleNameResolver = nodeModuleNameResolver;
+    function nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state) {
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
+        }
+        var resolvedFileName = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
+        return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
+    }
+    function directoryProbablyExists(directoryName, host) {
+        return !host.directoryExists || host.directoryExists(directoryName);
+    }
+    ts.directoryProbablyExists = directoryProbablyExists;
+    function loadModuleFromFile(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
+        var resolvedByAddingOrKeepingExtension = loadModuleFromFileWorker(candidate, extensions, failedLookupLocation, onlyRecordFailures, state);
+        if (resolvedByAddingOrKeepingExtension) {
+            return resolvedByAddingOrKeepingExtension;
+        }
+        if (ts.hasJavaScriptFileExtension(candidate)) {
+            var extensionless = ts.removeFileExtension(candidate);
+            if (state.traceEnabled) {
+                var extension = candidate.substring(extensionless.length);
+                trace(state.host, ts.Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
+            }
+            return loadModuleFromFileWorker(extensionless, extensions, failedLookupLocation, onlyRecordFailures, state);
+        }
+    }
+    function loadModuleFromFileWorker(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
+        if (!onlyRecordFailures) {
+            var directory = ts.getDirectoryPath(candidate);
+            if (directory) {
+                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
+            }
+        }
+        return ts.forEach(extensions, tryLoad);
+        function tryLoad(ext) {
+            if (state.skipTsx && ts.isJsxOrTsxExtension(ext)) {
+                return undefined;
+            }
+            var fileName = ts.fileExtensionIs(candidate, ext) ? candidate : candidate + ext;
+            if (!onlyRecordFailures && state.host.fileExists(fileName)) {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
+                }
+                return fileName;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
+                }
+                failedLookupLocation.push(fileName);
+                return undefined;
+            }
+        }
+    }
+    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocation, onlyRecordFailures, state) {
+        var packageJsonPath = ts.combinePaths(candidate, "package.json");
+        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
+        if (directoryExists && state.host.fileExists(packageJsonPath)) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
+            }
+            var typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
+            if (typesFile) {
+                var result = loadModuleFromFile(typesFile, extensions, failedLookupLocation, !directoryProbablyExists(ts.getDirectoryPath(typesFile), state.host), state);
+                if (result) {
+                    return result;
+                }
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.package_json_does_not_have_types_field);
+                }
+            }
+        }
+        else {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
+            }
+            failedLookupLocation.push(packageJsonPath);
+        }
+        return loadModuleFromFile(ts.combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
+    }
+    function loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) {
+        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
+        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
+        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
+        var result = loadModuleFromFile(candidate, ts.supportedTypeScriptExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
+        if (result) {
+            return result;
+        }
+        result = loadNodeModuleFromDirectory(ts.supportedTypeScriptExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
+        if (result) {
+            return result;
+        }
+    }
+    function loadModuleFromNodeModules(moduleName, directory, failedLookupLocations, state) {
+        directory = ts.normalizeSlashes(directory);
+        while (true) {
+            var baseName = ts.getBaseFileName(directory);
+            if (baseName !== "node_modules") {
+                var result = loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) ||
+                    loadModuleFromNodeModulesFolder(ts.combinePaths("@types", moduleName), directory, failedLookupLocations, state);
+                if (result) {
+                    return result;
+                }
+            }
+            var parentPath = ts.getDirectoryPath(directory);
+            if (parentPath === directory) {
+                break;
+            }
+            directory = parentPath;
+        }
+        return undefined;
+    }
+    function classicNameResolver(moduleName, containingFile, compilerOptions, host) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: !compilerOptions.jsx };
+        var failedLookupLocations = [];
+        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
+        if (resolvedFileName) {
+            return createResolvedModule(resolvedFileName, false, failedLookupLocations);
+        }
+        var referencedSourceFile;
+        if (moduleHasNonRelativeName(moduleName)) {
+            while (true) {
+                var searchName = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, false, state);
+                if (referencedSourceFile) {
+                    break;
+                }
+                var parentPath = ts.getDirectoryPath(containingDirectory);
+                if (parentPath === containingDirectory) {
+                    break;
+                }
+                containingDirectory = parentPath;
+            }
+        }
+        else {
+            var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+            referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, false, state);
+        }
+        return referencedSourceFile
+            ? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations: failedLookupLocations }
+            : { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
+    }
+    ts.classicNameResolver = classicNameResolver;
+    ts.defaultInitCompilerOptions = {
+        module: ts.ModuleKind.CommonJS,
+        target: 1,
+        noImplicitAny: false,
+        sourceMap: false
+    };
+    function createCompilerHost(options, setParentNodes) {
+        var existingDirectories = {};
+        function getCanonicalFileName(fileName) {
+            return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
+        }
+        var unsupportedFileEncodingErrorCode = -2147024809;
+        function getSourceFile(fileName, languageVersion, onError) {
+            var text;
+            try {
+                var start = new Date().getTime();
+                text = ts.sys.readFile(fileName, options.charset);
+                ts.ioReadTime += new Date().getTime() - start;
+            }
+            catch (e) {
+                if (onError) {
+                    onError(e.number === unsupportedFileEncodingErrorCode
+                        ? ts.createCompilerDiagnostic(ts.Diagnostics.Unsupported_file_encoding).messageText
+                        : e.message);
+                }
+                text = "";
+            }
+            return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
+        }
+        function directoryExists(directoryPath) {
+            if (ts.hasProperty(existingDirectories, directoryPath)) {
+                return true;
+            }
+            if (ts.sys.directoryExists(directoryPath)) {
+                existingDirectories[directoryPath] = true;
+                return true;
+            }
+            return false;
+        }
+        function ensureDirectoriesExist(directoryPath) {
+            if (directoryPath.length > ts.getRootLength(directoryPath) && !directoryExists(directoryPath)) {
+                var parentDirectory = ts.getDirectoryPath(directoryPath);
+                ensureDirectoriesExist(parentDirectory);
+                ts.sys.createDirectory(directoryPath);
+            }
+        }
+        var outputFingerprints;
+        function writeFileIfUpdated(fileName, data, writeByteOrderMark) {
+            if (!outputFingerprints) {
+                outputFingerprints = {};
+            }
+            var hash = ts.sys.createHash(data);
+            var mtimeBefore = ts.sys.getModifiedTime(fileName);
+            if (mtimeBefore && ts.hasProperty(outputFingerprints, fileName)) {
+                var fingerprint = outputFingerprints[fileName];
+                if (fingerprint.byteOrderMark === writeByteOrderMark &&
+                    fingerprint.hash === hash &&
+                    fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
+                    return;
+                }
+            }
+            ts.sys.writeFile(fileName, data, writeByteOrderMark);
+            var mtimeAfter = ts.sys.getModifiedTime(fileName);
+            outputFingerprints[fileName] = {
+                hash: hash,
+                byteOrderMark: writeByteOrderMark,
+                mtime: mtimeAfter
+            };
+        }
+        function writeFile(fileName, data, writeByteOrderMark, onError) {
+            try {
+                var start = new Date().getTime();
+                ensureDirectoriesExist(ts.getDirectoryPath(ts.normalizePath(fileName)));
+                if (ts.isWatchSet(options) && ts.sys.createHash && ts.sys.getModifiedTime) {
+                    writeFileIfUpdated(fileName, data, writeByteOrderMark);
+                }
+                else {
+                    ts.sys.writeFile(fileName, data, writeByteOrderMark);
+                }
+                ts.ioWriteTime += new Date().getTime() - start;
+            }
+            catch (e) {
+                if (onError) {
+                    onError(e.message);
+                }
+            }
+        }
+        function getDefaultTypeDirectiveNames(rootPath) {
+            var localTypes = ts.combinePaths(rootPath, "types");
+            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
+            var result = [];
+            if (ts.sys.directoryExists(localTypes)) {
+                result = result.concat(ts.sys.getDirectories(localTypes));
+            }
+            if (ts.sys.directoryExists(npmTypes)) {
+                result = result.concat(ts.sys.getDirectories(npmTypes));
+            }
+            return result;
+        }
+        function getDefaultLibLocation() {
+            return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
+        }
+        var newLine = ts.getNewLineCharacter(options);
+        var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
+        return {
+            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
+            getSourceFile: getSourceFile,
+            getDefaultLibLocation: getDefaultLibLocation,
+            getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
+            writeFile: writeFile,
+            getCurrentDirectory: ts.memoize(function () { return ts.sys.getCurrentDirectory(); }),
+            useCaseSensitiveFileNames: function () { return ts.sys.useCaseSensitiveFileNames; },
+            getCanonicalFileName: getCanonicalFileName,
+            getNewLine: function () { return newLine; },
+            fileExists: function (fileName) { return ts.sys.fileExists(fileName); },
+            readFile: function (fileName) { return ts.sys.readFile(fileName); },
+            trace: function (s) { return ts.sys.write(s + newLine); },
+            directoryExists: function (directoryName) { return ts.sys.directoryExists(directoryName); },
+            realpath: realpath
+        };
+    }
+    ts.createCompilerHost = createCompilerHost;
+    function getPreEmitDiagnostics(program, sourceFile, cancellationToken) {
+        var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
+        if (program.getCompilerOptions().declaration) {
+            diagnostics = diagnostics.concat(program.getDeclarationDiagnostics(sourceFile, cancellationToken));
+        }
+        return ts.sortAndDeduplicateDiagnostics(diagnostics);
+    }
+    ts.getPreEmitDiagnostics = getPreEmitDiagnostics;
+    function flattenDiagnosticMessageText(messageText, newLine) {
+        if (typeof messageText === "string") {
+            return messageText;
+        }
+        else {
+            var diagnosticChain = messageText;
+            var result = "";
+            var indent = 0;
+            while (diagnosticChain) {
+                if (indent) {
+                    result += newLine;
+                    for (var i = 0; i < indent; i++) {
+                        result += "  ";
+                    }
+                }
+                result += diagnosticChain.messageText;
+                indent++;
+                diagnosticChain = diagnosticChain.next;
+            }
+            return result;
+        }
+    }
+    ts.flattenDiagnosticMessageText = flattenDiagnosticMessageText;
+    function loadWithLocalCache(names, containingFile, loader) {
+        if (names.length === 0) {
+            return [];
+        }
+        var resolutions = [];
+        var cache = {};
+        for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
+            var name_34 = names_1[_i];
+            var result = void 0;
+            if (ts.hasProperty(cache, name_34)) {
+                result = cache[name_34];
+            }
+            else {
+                result = loader(name_34, containingFile);
+                cache[name_34] = result;
+            }
+            resolutions.push(result);
+        }
+        return resolutions;
+    }
+    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
+        if (options.types) {
+            return options.types;
+        }
+        if (host && host.getDefaultTypeDirectiveNames) {
+            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
+            if (commonRoot) {
+                return host.getDefaultTypeDirectiveNames(commonRoot);
+            }
+        }
+        return undefined;
+    }
+    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
+    function createProgram(rootNames, options, host, oldProgram) {
+        var program;
+        var files = [];
+        var commonSourceDirectory;
+        var diagnosticsProducingTypeChecker;
+        var noDiagnosticsTypeChecker;
+        var classifiableNames;
+        var resolvedTypeReferenceDirectives = {};
+        var fileProcessingDiagnostics = ts.createDiagnosticCollection();
+        var start = new Date().getTime();
+        host = host || createCompilerHost(options);
+        var skipDefaultLib = options.noLib;
+        var programDiagnostics = ts.createDiagnosticCollection();
+        var currentDirectory = host.getCurrentDirectory();
+        var supportedExtensions = ts.getSupportedExtensions(options);
+        var hasEmitBlockingDiagnostics = ts.createFileMap(getCanonicalFileName);
+        var resolveModuleNamesWorker;
+        if (host.resolveModuleNames) {
+            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
+        }
+        else {
+            var loader_1 = function (moduleName, containingFile) { return resolveModuleName(moduleName, containingFile, options, host).resolvedModule; };
+            resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(moduleNames, containingFile, loader_1); };
+        }
+        var resolveTypeReferenceDirectiveNamesWorker;
+        if (host.resolveTypeReferenceDirectives) {
+            resolveTypeReferenceDirectiveNamesWorker = function (typeDirectiveNames, containingFile) { return host.resolveTypeReferenceDirectives(typeDirectiveNames, containingFile); };
+        }
+        else {
+            var loader_2 = function (typesRef, containingFile) { return resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective; };
+            resolveTypeReferenceDirectiveNamesWorker = function (typeReferenceDirectiveNames, containingFile) { return loadWithLocalCache(typeReferenceDirectiveNames, containingFile, loader_2); };
+        }
+        var filesByName = ts.createFileMap();
+        var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
+        if (!tryReuseStructureFromOldProgram()) {
+            ts.forEach(rootNames, function (name) { return processRootFile(name, false); });
+            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
+            if (typeReferences) {
+                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, undefined);
+                for (var i = 0; i < typeReferences.length; i++) {
+                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
+                }
+            }
+            if (!skipDefaultLib) {
+                if (!options.lib) {
+                    processRootFile(host.getDefaultLibFileName(options), true);
+                }
+                else {
+                    var libDirectory_1 = host.getDefaultLibLocation ? host.getDefaultLibLocation() : ts.getDirectoryPath(host.getDefaultLibFileName(options));
+                    ts.forEach(options.lib, function (libFileName) {
+                        processRootFile(ts.combinePaths(libDirectory_1, libFileName), true);
+                    });
+                }
+            }
+        }
+        oldProgram = undefined;
+        program = {
+            getRootFileNames: function () { return rootNames; },
+            getSourceFile: getSourceFile,
+            getSourceFileByPath: getSourceFileByPath,
+            getSourceFiles: function () { return files; },
+            getCompilerOptions: function () { return options; },
+            getSyntacticDiagnostics: getSyntacticDiagnostics,
+            getOptionsDiagnostics: getOptionsDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getSemanticDiagnostics: getSemanticDiagnostics,
+            getDeclarationDiagnostics: getDeclarationDiagnostics,
+            getTypeChecker: getTypeChecker,
+            getClassifiableNames: getClassifiableNames,
+            getDiagnosticsProducingTypeChecker: getDiagnosticsProducingTypeChecker,
+            getCommonSourceDirectory: getCommonSourceDirectory,
+            emit: emit,
+            getCurrentDirectory: function () { return currentDirectory; },
+            getNodeCount: function () { return getDiagnosticsProducingTypeChecker().getNodeCount(); },
+            getIdentifierCount: function () { return getDiagnosticsProducingTypeChecker().getIdentifierCount(); },
+            getSymbolCount: function () { return getDiagnosticsProducingTypeChecker().getSymbolCount(); },
+            getTypeCount: function () { return getDiagnosticsProducingTypeChecker().getTypeCount(); },
+            getFileProcessingDiagnostics: function () { return fileProcessingDiagnostics; },
+            getResolvedTypeReferenceDirectives: function () { return resolvedTypeReferenceDirectives; }
+        };
+        verifyCompilerOptions();
+        ts.programTime += new Date().getTime() - start;
+        return program;
+        function getCommonSourceDirectory() {
+            if (typeof commonSourceDirectory === "undefined") {
+                if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
+                    commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
+                }
+                else {
+                    commonSourceDirectory = computeCommonSourceDirectory(files);
+                }
+                if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
+                    commonSourceDirectory += ts.directorySeparator;
+                }
+            }
+            return commonSourceDirectory;
+        }
+        function getClassifiableNames() {
+            if (!classifiableNames) {
+                getTypeChecker();
+                classifiableNames = {};
+                for (var _i = 0, files_3 = files; _i < files_3.length; _i++) {
+                    var sourceFile = files_3[_i];
+                    ts.copyMap(sourceFile.classifiableNames, classifiableNames);
+                }
+            }
+            return classifiableNames;
+        }
+        function tryReuseStructureFromOldProgram() {
+            if (!oldProgram) {
+                return false;
+            }
+            var oldOptions = oldProgram.getCompilerOptions();
+            if ((oldOptions.module !== options.module) ||
+                (oldOptions.moduleResolution !== options.moduleResolution) ||
+                (oldOptions.noResolve !== options.noResolve) ||
+                (oldOptions.target !== options.target) ||
+                (oldOptions.noLib !== options.noLib) ||
+                (oldOptions.jsx !== options.jsx) ||
+                (oldOptions.allowJs !== options.allowJs) ||
+                (oldOptions.rootDir !== options.rootDir) ||
+                (oldOptions.typesSearchPaths !== options.typesSearchPaths) ||
+                (oldOptions.configFilePath !== options.configFilePath) ||
+                (oldOptions.baseUrl !== options.baseUrl) ||
+                (oldOptions.typesRoot !== options.typesRoot) ||
+                !ts.arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
+                !ts.mapIsEqualTo(oldOptions.paths, options.paths)) {
+                return false;
+            }
+            ts.Debug.assert(!oldProgram.structureIsReused);
+            var oldRootNames = oldProgram.getRootFileNames();
+            if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
+                return false;
+            }
+            if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
+                return false;
+            }
+            var newSourceFiles = [];
+            var filePaths = [];
+            var modifiedSourceFiles = [];
+            for (var _i = 0, _a = oldProgram.getSourceFiles(); _i < _a.length; _i++) {
+                var oldSourceFile = _a[_i];
+                var newSourceFile = host.getSourceFileByPath
+                    ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target)
+                    : host.getSourceFile(oldSourceFile.fileName, options.target);
+                if (!newSourceFile) {
+                    return false;
+                }
+                newSourceFile.path = oldSourceFile.path;
+                filePaths.push(newSourceFile.path);
+                if (oldSourceFile !== newSourceFile) {
+                    if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
+                        return false;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
+                        return false;
+                    }
+                    collectExternalModuleReferences(newSourceFile);
+                    if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
+                        return false;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
+                        return false;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
+                        return false;
+                    }
+                    var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
+                    if (resolveModuleNamesWorker) {
+                        var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
+                        var resolutions = resolveModuleNamesWorker(moduleNames, newSourceFilePath);
+                        var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
+                        if (resolutionsChanged) {
+                            return false;
+                        }
+                    }
+                    if (resolveTypeReferenceDirectiveNamesWorker) {
+                        var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
+                        var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
+                        var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
+                        if (resolutionsChanged) {
+                            return false;
+                        }
+                    }
+                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
+                    newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
+                    modifiedSourceFiles.push(newSourceFile);
+                }
+                else {
+                    newSourceFile = oldSourceFile;
+                }
+                newSourceFiles.push(newSourceFile);
+            }
+            for (var i = 0, len = newSourceFiles.length; i < len; i++) {
+                filesByName.set(filePaths[i], newSourceFiles[i]);
+            }
+            files = newSourceFiles;
+            fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
+            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
+                var modifiedFile = modifiedSourceFiles_1[_b];
+                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile);
+            }
+            resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
+            oldProgram.structureIsReused = true;
+            return true;
+        }
+        function getEmitHost(writeFileCallback) {
+            return {
+                getCanonicalFileName: getCanonicalFileName,
+                getCommonSourceDirectory: program.getCommonSourceDirectory,
+                getCompilerOptions: program.getCompilerOptions,
+                getCurrentDirectory: function () { return currentDirectory; },
+                getNewLine: function () { return host.getNewLine(); },
+                getSourceFile: program.getSourceFile,
+                getSourceFileByPath: program.getSourceFileByPath,
+                getSourceFiles: program.getSourceFiles,
+                writeFile: writeFileCallback || (function (fileName, data, writeByteOrderMark, onError, sourceFiles) { return host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles); }),
+                isEmitBlocked: isEmitBlocked
+            };
+        }
+        function getDiagnosticsProducingTypeChecker() {
+            return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, true));
+        }
+        function getTypeChecker() {
+            return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, false));
+        }
+        function emit(sourceFile, writeFileCallback, cancellationToken) {
+            var _this = this;
+            return runWithCancellationToken(function () { return emitWorker(_this, sourceFile, writeFileCallback, cancellationToken); });
+        }
+        function isEmitBlocked(emitFileName) {
+            return hasEmitBlockingDiagnostics.contains(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName));
+        }
+        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken) {
+            var declarationDiagnostics = [];
+            if (options.noEmit) {
+                return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
+            }
+            if (options.noEmitOnError) {
+                var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
+                if (diagnostics.length === 0 && program.getCompilerOptions().declaration) {
+                    declarationDiagnostics = program.getDeclarationDiagnostics(undefined, cancellationToken);
+                }
+                if (diagnostics.length > 0 || declarationDiagnostics.length > 0) {
+                    return {
+                        diagnostics: ts.concatenate(diagnostics, declarationDiagnostics),
+                        sourceMaps: undefined,
+                        emittedFiles: undefined,
+                        emitSkipped: true
+                    };
+                }
+            }
+            var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile);
+            var start = new Date().getTime();
+            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile);
+            ts.emitTime += new Date().getTime() - start;
+            return emitResult;
+        }
+        function getSourceFile(fileName) {
+            return getSourceFileByPath(ts.toPath(fileName, currentDirectory, getCanonicalFileName));
+        }
+        function getSourceFileByPath(path) {
+            return filesByName.get(path);
+        }
+        function getDiagnosticsHelper(sourceFile, getDiagnostics, cancellationToken) {
+            if (sourceFile) {
+                return getDiagnostics(sourceFile, cancellationToken);
+            }
+            var allDiagnostics = [];
+            ts.forEach(program.getSourceFiles(), function (sourceFile) {
+                if (cancellationToken) {
+                    cancellationToken.throwIfCancellationRequested();
+                }
+                ts.addRange(allDiagnostics, getDiagnostics(sourceFile, cancellationToken));
+            });
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function getSyntacticDiagnostics(sourceFile, cancellationToken) {
+            return getDiagnosticsHelper(sourceFile, getSyntacticDiagnosticsForFile, cancellationToken);
+        }
+        function getSemanticDiagnostics(sourceFile, cancellationToken) {
+            return getDiagnosticsHelper(sourceFile, getSemanticDiagnosticsForFile, cancellationToken);
+        }
+        function getDeclarationDiagnostics(sourceFile, cancellationToken) {
+            var options = program.getCompilerOptions();
+            if (!sourceFile || options.out || options.outFile) {
+                return getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+            }
+            else {
+                return getDiagnosticsHelper(sourceFile, getDeclarationDiagnosticsForFile, cancellationToken);
+            }
+        }
+        function getSyntacticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return sourceFile.parseDiagnostics;
+        }
+        function runWithCancellationToken(func) {
+            try {
+                return func();
+            }
+            catch (e) {
+                if (e instanceof ts.OperationCanceledException) {
+                    noDiagnosticsTypeChecker = undefined;
+                    diagnosticsProducingTypeChecker = undefined;
+                }
+                throw e;
+            }
+        }
+        function getSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var typeChecker = getDiagnosticsProducingTypeChecker();
+                ts.Debug.assert(!!sourceFile.bindDiagnostics);
+                var bindDiagnostics = sourceFile.bindDiagnostics;
+                var checkDiagnostics = ts.isSourceFileJavaScript(sourceFile) ?
+                    getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) :
+                    typeChecker.getDiagnostics(sourceFile, cancellationToken);
+                var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
+                var programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
+                return bindDiagnostics.concat(checkDiagnostics).concat(fileProcessingDiagnosticsInFile).concat(programDiagnosticsInFile);
+            });
+        }
+        function getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var diagnostics = [];
+                walk(sourceFile);
+                return diagnostics;
+                function walk(node) {
+                    if (!node) {
+                        return false;
+                    }
+                    switch (node.kind) {
+                        case 229:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 235:
+                            if (node.isExportEquals) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 221:
+                            var classDeclaration = node;
+                            if (checkModifiers(classDeclaration.modifiers) ||
+                                checkTypeParameters(classDeclaration.typeParameters)) {
+                                return true;
+                            }
+                            break;
+                        case 251:
+                            var heritageClause = node;
+                            if (heritageClause.token === 106) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 222:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 225:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 223:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 147:
+                        case 146:
+                        case 148:
+                        case 149:
+                        case 150:
+                        case 179:
+                        case 220:
+                        case 180:
+                        case 220:
+                            var functionDeclaration = node;
+                            if (checkModifiers(functionDeclaration.modifiers) ||
+                                checkTypeParameters(functionDeclaration.typeParameters) ||
+                                checkTypeAnnotation(functionDeclaration.type)) {
+                                return true;
+                            }
+                            break;
+                        case 200:
+                            var variableStatement = node;
+                            if (checkModifiers(variableStatement.modifiers)) {
+                                return true;
+                            }
+                            break;
+                        case 218:
+                            var variableDeclaration = node;
+                            if (checkTypeAnnotation(variableDeclaration.type)) {
+                                return true;
+                            }
+                            break;
+                        case 174:
+                        case 175:
+                            var expression = node;
+                            if (expression.typeArguments && expression.typeArguments.length > 0) {
+                                var start_2 = expression.typeArguments.pos;
+                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_2, expression.typeArguments.end - start_2, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 142:
+                            var parameter = node;
+                            if (parameter.modifiers) {
+                                var start_3 = parameter.modifiers.pos;
+                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_3, parameter.modifiers.end - start_3, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            if (parameter.questionToken) {
+                                diagnostics.push(ts.createDiagnosticForNode(parameter.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
+                                return true;
+                            }
+                            if (parameter.type) {
+                                diagnostics.push(ts.createDiagnosticForNode(parameter.type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 145:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.property_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 224:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 177:
+                            var typeAssertionExpression = node;
+                            diagnostics.push(ts.createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 143:
+                            if (!options.experimentalDecorators) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
+                            }
+                            return true;
+                    }
+                    return ts.forEachChild(node, walk);
+                }
+                function checkTypeParameters(typeParameters) {
+                    if (typeParameters) {
+                        var start_4 = typeParameters.pos;
+                        diagnostics.push(ts.createFileDiagnostic(sourceFile, start_4, typeParameters.end - start_4, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
+                        return true;
+                    }
+                    return false;
+                }
+                function checkTypeAnnotation(type) {
+                    if (type) {
+                        diagnostics.push(ts.createDiagnosticForNode(type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
+                        return true;
+                    }
+                    return false;
+                }
+                function checkModifiers(modifiers) {
+                    if (modifiers) {
+                        for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
+                            var modifier = modifiers_1[_i];
+                            switch (modifier.kind) {
+                                case 112:
+                                case 110:
+                                case 111:
+                                case 128:
+                                case 122:
+                                    diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
+                                    return true;
+                                case 113:
+                                case 82:
+                                case 74:
+                                case 77:
+                                case 115:
+                            }
+                        }
+                    }
+                    return false;
+                }
+            });
+        }
+        function getDeclarationDiagnosticsWorker(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
+                var writeFile = function () { };
+                return ts.getDeclarationDiagnostics(getEmitHost(writeFile), resolver, sourceFile);
+            });
+        }
+        function getDeclarationDiagnosticsForFile(sourceFile, cancellationToken) {
+            return ts.isDeclarationFile(sourceFile) ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+        }
+        function getOptionsDiagnostics() {
+            var allDiagnostics = [];
+            ts.addRange(allDiagnostics, fileProcessingDiagnostics.getGlobalDiagnostics());
+            ts.addRange(allDiagnostics, programDiagnostics.getGlobalDiagnostics());
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function getGlobalDiagnostics() {
+            var allDiagnostics = [];
+            ts.addRange(allDiagnostics, getDiagnosticsProducingTypeChecker().getGlobalDiagnostics());
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function hasExtension(fileName) {
+            return ts.getBaseFileName(fileName).indexOf(".") >= 0;
+        }
+        function processRootFile(fileName, isDefaultLib) {
+            processSourceFile(ts.normalizePath(fileName), isDefaultLib, true);
+        }
+        function fileReferenceIsEqualTo(a, b) {
+            return a.fileName === b.fileName;
+        }
+        function moduleNameIsEqualTo(a, b) {
+            return a.text === b.text;
+        }
+        function getTextOfLiteral(literal) {
+            return literal.text;
+        }
+        function collectExternalModuleReferences(file) {
+            if (file.imports) {
+                return;
+            }
+            var isJavaScriptFile = ts.isSourceFileJavaScript(file);
+            var isExternalModuleFile = ts.isExternalModule(file);
+            var imports;
+            var moduleAugmentations;
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var node = _a[_i];
+                collectModuleReferences(node, false);
+                if (isJavaScriptFile) {
+                    collectRequireCalls(node);
+                }
+            }
+            file.imports = imports || emptyArray;
+            file.moduleAugmentations = moduleAugmentations || emptyArray;
+            return;
+            function collectModuleReferences(node, inAmbientModule) {
+                switch (node.kind) {
+                    case 230:
+                    case 229:
+                    case 236:
+                        var moduleNameExpr = ts.getExternalModuleName(node);
+                        if (!moduleNameExpr || moduleNameExpr.kind !== 9) {
+                            break;
+                        }
+                        if (!moduleNameExpr.text) {
+                            break;
+                        }
+                        if (!inAmbientModule || !ts.isExternalModuleNameRelative(moduleNameExpr.text)) {
+                            (imports || (imports = [])).push(moduleNameExpr);
+                        }
+                        break;
+                    case 225:
+                        if (ts.isAmbientModule(node) && (inAmbientModule || node.flags & 2 || ts.isDeclarationFile(file))) {
+                            var moduleName = node.name;
+                            if (isExternalModuleFile || (inAmbientModule && !ts.isExternalModuleNameRelative(moduleName.text))) {
+                                (moduleAugmentations || (moduleAugmentations = [])).push(moduleName);
+                            }
+                            else if (!inAmbientModule) {
+                                for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
+                                    var statement = _a[_i];
+                                    collectModuleReferences(statement, true);
+                                }
+                            }
+                        }
+                }
+            }
+            function collectRequireCalls(node) {
+                if (ts.isRequireCall(node, true)) {
+                    (imports || (imports = [])).push(node.arguments[0]);
+                }
+                else {
+                    ts.forEachChild(node, collectRequireCalls);
+                }
+            }
+        }
+        function processSourceFile(fileName, isDefaultLib, isReference, refFile, refPos, refEnd) {
+            var diagnosticArgument;
+            var diagnostic;
+            if (hasExtension(fileName)) {
+                if (!options.allowNonTsExtensions && !ts.forEach(supportedExtensions, function (extension) { return ts.fileExtensionIs(host.getCanonicalFileName(fileName), extension); })) {
+                    diagnostic = ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1;
+                    diagnosticArgument = [fileName, "'" + supportedExtensions.join("', '") + "'"];
+                }
+                else if (!findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd)) {
+                    diagnostic = ts.Diagnostics.File_0_not_found;
+                    diagnosticArgument = [fileName];
+                }
+                else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
+                    diagnostic = ts.Diagnostics.A_file_cannot_have_a_reference_to_itself;
+                    diagnosticArgument = [fileName];
+                }
+            }
+            else {
+                var nonTsFile = options.allowNonTsExtensions && findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd);
+                if (!nonTsFile) {
+                    if (options.allowNonTsExtensions) {
+                        diagnostic = ts.Diagnostics.File_0_not_found;
+                        diagnosticArgument = [fileName];
+                    }
+                    else if (!ts.forEach(supportedExtensions, function (extension) { return findSourceFile(fileName + extension, ts.toPath(fileName + extension, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd); })) {
+                        diagnostic = ts.Diagnostics.File_0_not_found;
+                        fileName += ".ts";
+                        diagnosticArgument = [fileName];
+                    }
+                }
+            }
+            if (diagnostic) {
+                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
+                    fileProcessingDiagnostics.add(ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(diagnosticArgument)));
+                }
+                else {
+                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(diagnosticArgument)));
+                }
+            }
+        }
+        function reportFileNamesDifferOnlyInCasingError(fileName, existingFileName, refFile, refPos, refEnd) {
+            if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
+            }
+            else {
+                fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
+            }
+        }
+        function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) {
+            if (filesByName.contains(path)) {
+                var file_1 = filesByName.get(path);
+                if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
+                    reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
+                }
+                return file_1;
+            }
+            var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
+                if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                    fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
+                }
+                else {
+                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
+                }
+            });
+            filesByName.set(path, file);
+            if (file) {
+                file.path = path;
+                if (host.useCaseSensitiveFileNames()) {
+                    var existingFile = filesByNameIgnoreCase.get(path);
+                    if (existingFile) {
+                        reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd);
+                    }
+                    else {
+                        filesByNameIgnoreCase.set(path, file);
+                    }
+                }
+                skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
+                var basePath = ts.getDirectoryPath(fileName);
+                if (!options.noResolve) {
+                    processReferencedFiles(file, basePath, isDefaultLib);
+                    processTypeReferenceDirectives(file);
+                }
+                processImportedModules(file, basePath);
+                if (isDefaultLib) {
+                    files.unshift(file);
+                }
+                else {
+                    files.push(file);
+                }
+            }
+            return file;
+        }
+        function processReferencedFiles(file, basePath, isDefaultLib) {
+            ts.forEach(file.referencedFiles, function (ref) {
+                var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
+                processSourceFile(referencedFileName, isDefaultLib, true, file, ref.pos, ref.end);
+            });
+        }
+        function processTypeReferenceDirectives(file) {
+            var typeDirectives = ts.map(file.typeReferenceDirectives, function (l) { return l.fileName; });
+            var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeDirectives, file.fileName);
+            for (var i = 0; i < typeDirectives.length; i++) {
+                var ref = file.typeReferenceDirectives[i];
+                var resolvedTypeReferenceDirective = resolutions[i];
+                ts.setResolvedTypeReferenceDirective(file, ref.fileName, resolvedTypeReferenceDirective);
+                processTypeReferenceDirective(ref.fileName, resolvedTypeReferenceDirective, file, ref.pos, ref.end);
+            }
+        }
+        function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
+            var previousResolution = resolvedTypeReferenceDirectives[typeReferenceDirective];
+            if (previousResolution && previousResolution.primary) {
+                return;
+            }
+            var saveResolution = true;
+            if (resolvedTypeReferenceDirective) {
+                if (resolvedTypeReferenceDirective.primary) {
+                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, true, refFile, refPos, refEnd);
+                }
+                else {
+                    if (previousResolution) {
+                        var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
+                        if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
+                            fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
+                        }
+                        saveResolution = false;
+                    }
+                    else {
+                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, false, true, refFile, refPos, refEnd);
+                    }
+                }
+            }
+            else {
+                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_name_0, typeReferenceDirective));
+            }
+            if (saveResolution) {
+                resolvedTypeReferenceDirectives[typeReferenceDirective] = resolvedTypeReferenceDirective;
+            }
+        }
+        function createDiagnostic(refFile, refPos, refEnd, message) {
+            var args = [];
+            for (var _i = 4; _i < arguments.length; _i++) {
+                args[_i - 4] = arguments[_i];
+            }
+            if (refFile === undefined || refPos === undefined || refEnd === undefined) {
+                return ts.createCompilerDiagnostic.apply(void 0, [message].concat(args));
+            }
+            else {
+                return ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, message].concat(args));
+            }
+        }
+        function getCanonicalFileName(fileName) {
+            return host.getCanonicalFileName(fileName);
+        }
+        function processImportedModules(file, basePath) {
+            collectExternalModuleReferences(file);
+            if (file.imports.length || file.moduleAugmentations.length) {
+                file.resolvedModules = {};
+                var moduleNames = ts.map(ts.concatenate(file.imports, file.moduleAugmentations), getTextOfLiteral);
+                var resolutions = resolveModuleNamesWorker(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory));
+                for (var i = 0; i < moduleNames.length; i++) {
+                    var resolution = resolutions[i];
+                    ts.setResolvedModule(file, moduleNames[i], resolution);
+                    var shouldAddFile = resolution &&
+                        !options.noResolve &&
+                        i < file.imports.length;
+                    if (shouldAddFile) {
+                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), false, false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
+                    }
+                }
+            }
+            else {
+                file.resolvedModules = undefined;
+            }
+            return;
+        }
+        function computeCommonSourceDirectory(sourceFiles) {
+            var fileNames = [];
+            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
+                var file = sourceFiles_2[_i];
+                if (!file.isDeclarationFile) {
+                    fileNames.push(file.fileName);
+                }
+            }
+            return computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName);
+        }
+        function checkSourceFilesBelongToPath(sourceFiles, rootDirectory) {
+            var allFilesBelongToPath = true;
+            if (sourceFiles) {
+                var absoluteRootDirectoryPath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(rootDirectory, currentDirectory));
+                for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
+                    var sourceFile = sourceFiles_3[_i];
+                    if (!ts.isDeclarationFile(sourceFile)) {
+                        var absoluteSourceFilePath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
+                        if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
+                            programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
+                            allFilesBelongToPath = false;
+                        }
+                    }
+                }
+            }
+            return allFilesBelongToPath;
+        }
+        function verifyCompilerOptions() {
+            if (options.isolatedModules) {
+                if (options.declaration) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules"));
+                }
+                if (options.noEmitOnError) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules"));
+                }
+                if (options.out) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules"));
+                }
+                if (options.outFile) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules"));
+                }
+            }
+            if (options.inlineSourceMap) {
+                if (options.sourceMap) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap"));
+                }
+                if (options.mapRoot) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap"));
+                }
+            }
+            if (options.paths && options.baseUrl === undefined) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option));
+            }
+            if (options.paths) {
+                for (var key in options.paths) {
+                    if (!ts.hasProperty(options.paths, key)) {
+                        continue;
+                    }
+                    if (!hasZeroOrOneAsteriskCharacter(key)) {
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key));
+                    }
+                    if (ts.isArray(options.paths[key])) {
+                        for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
+                            var subst = _a[_i];
+                            var typeOfSubst = typeof subst;
+                            if (typeOfSubst === "string") {
+                                if (!hasZeroOrOneAsteriskCharacter(subst)) {
+                                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key));
+                                }
+                            }
+                            else {
+                                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst));
+                            }
+                        }
+                    }
+                    else {
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
+                    }
+                }
+            }
+            if (!options.sourceMap && !options.inlineSourceMap) {
+                if (options.inlineSources) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "inlineSources"));
+                }
+                if (options.sourceRoot) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "sourceRoot"));
+                }
+            }
+            if (options.out && options.outFile) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
+            }
+            if (options.mapRoot && !options.sourceMap) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
+            }
+            if (options.declarationDir) {
+                if (!options.declaration) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration"));
+                }
+                if (options.out || options.outFile) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile"));
+                }
+            }
+            if (options.lib && options.noLib) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib"));
+            }
+            var languageVersion = options.target || 0;
+            var outFile = options.outFile || options.out;
+            var firstExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) ? f : undefined; });
+            if (options.isolatedModules) {
+                if (options.module === ts.ModuleKind.None && languageVersion < 2) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
+                }
+                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
+                if (firstNonExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
+                }
+            }
+            else if (firstExternalModuleSourceFile && languageVersion < 2 && options.module === ts.ModuleKind.None) {
+                var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
+            }
+            if (options.module === ts.ModuleKind.ES6 && languageVersion < 2) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
+            }
+            if (outFile) {
+                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+                }
+                else if (options.module === undefined && firstExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
+                }
+            }
+            if (options.outDir ||
+                options.sourceRoot ||
+                options.mapRoot) {
+                var dir = getCommonSourceDirectory();
+                if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files));
+                }
+            }
+            if (!options.noEmit && options.allowJs && options.declaration) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration"));
+            }
+            if (options.emitDecoratorMetadata &&
+                !options.experimentalDecorators) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators"));
+            }
+            if (options.reactNamespace && !ts.isIdentifier(options.reactNamespace, languageVersion)) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace));
+            }
+            if (!options.noEmit && !options.suppressOutputPathCheck) {
+                var emitHost = getEmitHost();
+                var emitFilesSeen_1 = ts.createFileMap(!host.useCaseSensitiveFileNames() ? function (key) { return key.toLocaleLowerCase(); } : undefined);
+                ts.forEachExpectedEmitFile(emitHost, function (emitFileNames, sourceFiles, isBundledEmit) {
+                    verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen_1);
+                    verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
+                });
+            }
+            function verifyEmitFilePath(emitFileName, emitFilesSeen) {
+                if (emitFileName) {
+                    var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName);
+                    if (filesByName.contains(emitFilePath)) {
+                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file);
+                    }
+                    if (emitFilesSeen.contains(emitFilePath)) {
+                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files);
+                    }
+                    else {
+                        emitFilesSeen.set(emitFilePath, true);
+                    }
+                }
+            }
+        }
+        function createEmitBlockingDiagnostics(emitFileName, emitFilePath, message) {
+            hasEmitBlockingDiagnostics.set(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName), true);
+            programDiagnostics.add(ts.createCompilerDiagnostic(message, emitFileName));
+        }
+    }
+    ts.createProgram = createProgram;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var BreakpointResolver;
+    (function (BreakpointResolver) {
+        function spanInSourceFileAtLocation(sourceFile, position) {
+            if (sourceFile.isDeclarationFile) {
+                return undefined;
+            }
+            var tokenAtLocation = ts.getTokenAtPosition(sourceFile, position);
+            var lineOfPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
+            if (sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getStart(sourceFile)).line > lineOfPosition) {
+                tokenAtLocation = ts.findPrecedingToken(tokenAtLocation.pos, sourceFile);
+                if (!tokenAtLocation || sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getEnd()).line !== lineOfPosition) {
+                    return undefined;
+                }
+            }
+            if (ts.isInAmbientContext(tokenAtLocation)) {
+                return undefined;
+            }
+            return spanInNode(tokenAtLocation);
+            function textSpan(startNode, endNode) {
+                var start = startNode.decorators ?
+                    ts.skipTrivia(sourceFile.text, startNode.decorators.end) :
+                    startNode.getStart(sourceFile);
+                return ts.createTextSpanFromBounds(start, (endNode || startNode).getEnd());
+            }
+            function textSpanEndingAtNextToken(startNode, previousTokenToFindNextEndToken) {
+                return textSpan(startNode, ts.findNextToken(previousTokenToFindNextEndToken, previousTokenToFindNextEndToken.parent));
+            }
+            function spanInNodeIfStartsOnSameLine(node, otherwiseOnNode) {
+                if (node && lineOfPosition === sourceFile.getLineAndCharacterOfPosition(node.getStart(sourceFile)).line) {
+                    return spanInNode(node);
+                }
+                return spanInNode(otherwiseOnNode);
+            }
+            function spanInNodeArray(nodeArray) {
+                return ts.createTextSpanFromBounds(ts.skipTrivia(sourceFile.text, nodeArray.pos), nodeArray.end);
+            }
+            function spanInPreviousNode(node) {
+                return spanInNode(ts.findPrecedingToken(node.pos, sourceFile));
+            }
+            function spanInNextNode(node) {
+                return spanInNode(ts.findNextToken(node, node.parent));
+            }
+            function spanInNode(node) {
+                if (node) {
+                    switch (node.kind) {
+                        case 200:
+                            return spanInVariableDeclaration(node.declarationList.declarations[0]);
+                        case 218:
+                        case 145:
+                        case 144:
+                            return spanInVariableDeclaration(node);
+                        case 142:
+                            return spanInParameterDeclaration(node);
+                        case 220:
+                        case 147:
+                        case 146:
+                        case 149:
+                        case 150:
+                        case 148:
+                        case 179:
+                        case 180:
+                            return spanInFunctionDeclaration(node);
+                        case 199:
+                            if (ts.isFunctionBlock(node)) {
+                                return spanInFunctionBlock(node);
+                            }
+                        case 226:
+                            return spanInBlock(node);
+                        case 252:
+                            return spanInBlock(node.block);
+                        case 202:
+                            return textSpan(node.expression);
+                        case 211:
+                            return textSpan(node.getChildAt(0), node.expression);
+                        case 205:
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 204:
+                            return spanInNode(node.statement);
+                        case 217:
+                            return textSpan(node.getChildAt(0));
+                        case 203:
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 214:
+                            return spanInNode(node.statement);
+                        case 210:
+                        case 209:
+                            return textSpan(node.getChildAt(0), node.label);
+                        case 206:
+                            return spanInForStatement(node);
+                        case 207:
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 208:
+                            return spanInInitializerOfForLike(node);
+                        case 213:
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 249:
+                        case 250:
+                            return spanInNode(node.statements[0]);
+                        case 216:
+                            return spanInBlock(node.tryBlock);
+                        case 215:
+                            return textSpan(node, node.expression);
+                        case 235:
+                            return textSpan(node, node.expression);
+                        case 229:
+                            return textSpan(node, node.moduleReference);
+                        case 230:
+                            return textSpan(node, node.moduleSpecifier);
+                        case 236:
+                            return textSpan(node, node.moduleSpecifier);
+                        case 225:
+                            if (ts.getModuleInstanceState(node) !== 1) {
+                                return undefined;
+                            }
+                        case 221:
+                        case 224:
+                        case 255:
+                        case 169:
+                            return textSpan(node);
+                        case 212:
+                            return spanInNode(node.statement);
+                        case 143:
+                            return spanInNodeArray(node.parent.decorators);
+                        case 167:
+                        case 168:
+                            return spanInBindingPattern(node);
+                        case 222:
+                        case 223:
+                            return undefined;
+                        case 23:
+                        case 1:
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile));
+                        case 24:
+                            return spanInPreviousNode(node);
+                        case 15:
+                            return spanInOpenBraceToken(node);
+                        case 16:
+                            return spanInCloseBraceToken(node);
+                        case 20:
+                            return spanInCloseBracketToken(node);
+                        case 17:
+                            return spanInOpenParenToken(node);
+                        case 18:
+                            return spanInCloseParenToken(node);
+                        case 54:
+                            return spanInColonToken(node);
+                        case 27:
+                        case 25:
+                            return spanInGreaterThanOrLessThanToken(node);
+                        case 104:
+                            return spanInWhileKeyword(node);
+                        case 80:
+                        case 72:
+                        case 85:
+                            return spanInNextNode(node);
+                        case 138:
+                            return spanInOfKeyword(node);
+                        default:
+                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node)) {
+                                return spanInArrayLiteralOrObjectLiteralDestructuringPattern(node);
+                            }
+                            if ((node.kind === 69 ||
+                                node.kind == 191 ||
+                                node.kind === 253 ||
+                                node.kind === 254) &&
+                                ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
+                                return textSpan(node);
+                            }
+                            if (node.kind === 187) {
+                                var binaryExpression = node;
+                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left)) {
+                                    return spanInArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left);
+                                }
+                                if (binaryExpression.operatorToken.kind === 56 &&
+                                    ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.parent)) {
+                                    return textSpan(node);
+                                }
+                                if (binaryExpression.operatorToken.kind === 24) {
+                                    return spanInNode(binaryExpression.left);
+                                }
+                            }
+                            if (ts.isExpression(node)) {
+                                switch (node.parent.kind) {
+                                    case 204:
+                                        return spanInPreviousNode(node);
+                                    case 143:
+                                        return spanInNode(node.parent);
+                                    case 206:
+                                    case 208:
+                                        return textSpan(node);
+                                    case 187:
+                                        if (node.parent.operatorToken.kind === 24) {
+                                            return textSpan(node);
+                                        }
+                                        break;
+                                    case 180:
+                                        if (node.parent.body === node) {
+                                            return textSpan(node);
+                                        }
+                                        break;
+                                }
+                            }
+                            if (node.parent.kind === 253 &&
+                                node.parent.name === node &&
+                                !ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.parent)) {
+                                return spanInNode(node.parent.initializer);
+                            }
+                            if (node.parent.kind === 177 && node.parent.type === node) {
+                                return spanInNextNode(node.parent.type);
+                            }
+                            if (ts.isFunctionLike(node.parent) && node.parent.type === node) {
+                                return spanInPreviousNode(node);
+                            }
+                            if ((node.parent.kind === 218 ||
+                                node.parent.kind === 142)) {
+                                var paramOrVarDecl = node.parent;
+                                if (paramOrVarDecl.initializer === node ||
+                                    paramOrVarDecl.type === node ||
+                                    ts.isAssignmentOperator(node.kind)) {
+                                    return spanInPreviousNode(node);
+                                }
+                            }
+                            if (node.parent.kind === 187) {
+                                var binaryExpression = node.parent;
+                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left) &&
+                                    (binaryExpression.right === node ||
+                                        binaryExpression.operatorToken === node)) {
+                                    return spanInPreviousNode(node);
+                                }
+                            }
+                            return spanInNode(node.parent);
+                    }
+                }
+                function textSpanFromVariableDeclaration(variableDeclaration) {
+                    var declarations = variableDeclaration.parent.declarations;
+                    if (declarations && declarations[0] === variableDeclaration) {
+                        return textSpan(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent), variableDeclaration);
+                    }
+                    else {
+                        return textSpan(variableDeclaration);
+                    }
+                }
+                function spanInVariableDeclaration(variableDeclaration) {
+                    if (variableDeclaration.parent.parent.kind === 207) {
+                        return spanInNode(variableDeclaration.parent.parent);
+                    }
+                    if (ts.isBindingPattern(variableDeclaration.name)) {
+                        return spanInBindingPattern(variableDeclaration.name);
+                    }
+                    if (variableDeclaration.initializer ||
+                        (variableDeclaration.flags & 1) ||
+                        variableDeclaration.parent.parent.kind === 208) {
+                        return textSpanFromVariableDeclaration(variableDeclaration);
+                    }
+                    var declarations = variableDeclaration.parent.declarations;
+                    if (declarations && declarations[0] !== variableDeclaration) {
+                        return spanInNode(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent));
+                    }
+                }
+                function canHaveSpanInParameterDeclaration(parameter) {
+                    return !!parameter.initializer || parameter.dotDotDotToken !== undefined ||
+                        !!(parameter.flags & 4) || !!(parameter.flags & 8);
+                }
+                function spanInParameterDeclaration(parameter) {
+                    if (ts.isBindingPattern(parameter.name)) {
+                        return spanInBindingPattern(parameter.name);
+                    }
+                    else if (canHaveSpanInParameterDeclaration(parameter)) {
+                        return textSpan(parameter);
+                    }
+                    else {
+                        var functionDeclaration = parameter.parent;
+                        var indexOfParameter = ts.indexOf(functionDeclaration.parameters, parameter);
+                        if (indexOfParameter) {
+                            return spanInParameterDeclaration(functionDeclaration.parameters[indexOfParameter - 1]);
+                        }
+                        else {
+                            return spanInNode(functionDeclaration.body);
+                        }
+                    }
+                }
+                function canFunctionHaveSpanInWholeDeclaration(functionDeclaration) {
+                    return !!(functionDeclaration.flags & 1) ||
+                        (functionDeclaration.parent.kind === 221 && functionDeclaration.kind !== 148);
+                }
+                function spanInFunctionDeclaration(functionDeclaration) {
+                    if (!functionDeclaration.body) {
+                        return undefined;
+                    }
+                    if (canFunctionHaveSpanInWholeDeclaration(functionDeclaration)) {
+                        return textSpan(functionDeclaration);
+                    }
+                    return spanInNode(functionDeclaration.body);
+                }
+                function spanInFunctionBlock(block) {
+                    var nodeForSpanInBlock = block.statements.length ? block.statements[0] : block.getLastToken();
+                    if (canFunctionHaveSpanInWholeDeclaration(block.parent)) {
+                        return spanInNodeIfStartsOnSameLine(block.parent, nodeForSpanInBlock);
+                    }
+                    return spanInNode(nodeForSpanInBlock);
+                }
+                function spanInBlock(block) {
+                    switch (block.parent.kind) {
+                        case 225:
+                            if (ts.getModuleInstanceState(block.parent) !== 1) {
+                                return undefined;
+                            }
+                        case 205:
+                        case 203:
+                        case 207:
+                            return spanInNodeIfStartsOnSameLine(block.parent, block.statements[0]);
+                        case 206:
+                        case 208:
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(block.pos, sourceFile, block.parent), block.statements[0]);
+                    }
+                    return spanInNode(block.statements[0]);
+                }
+                function spanInInitializerOfForLike(forLikeStatement) {
+                    if (forLikeStatement.initializer.kind === 219) {
+                        var variableDeclarationList = forLikeStatement.initializer;
+                        if (variableDeclarationList.declarations.length > 0) {
+                            return spanInNode(variableDeclarationList.declarations[0]);
+                        }
+                    }
+                    else {
+                        return spanInNode(forLikeStatement.initializer);
+                    }
+                }
+                function spanInForStatement(forStatement) {
+                    if (forStatement.initializer) {
+                        return spanInInitializerOfForLike(forStatement);
+                    }
+                    if (forStatement.condition) {
+                        return textSpan(forStatement.condition);
+                    }
+                    if (forStatement.incrementor) {
+                        return textSpan(forStatement.incrementor);
+                    }
+                }
+                function spanInBindingPattern(bindingPattern) {
+                    var firstBindingElement = ts.forEach(bindingPattern.elements, function (element) { return element.kind !== 193 ? element : undefined; });
+                    if (firstBindingElement) {
+                        return spanInNode(firstBindingElement);
+                    }
+                    if (bindingPattern.parent.kind === 169) {
+                        return textSpan(bindingPattern.parent);
+                    }
+                    return textSpanFromVariableDeclaration(bindingPattern.parent);
+                }
+                function spanInArrayLiteralOrObjectLiteralDestructuringPattern(node) {
+                    ts.Debug.assert(node.kind !== 168 && node.kind !== 167);
+                    var elements = node.kind === 170 ?
+                        node.elements :
+                        node.properties;
+                    var firstBindingElement = ts.forEach(elements, function (element) { return element.kind !== 193 ? element : undefined; });
+                    if (firstBindingElement) {
+                        return spanInNode(firstBindingElement);
+                    }
+                    return textSpan(node.parent.kind === 187 ? node.parent : node);
+                }
+                function spanInOpenBraceToken(node) {
+                    switch (node.parent.kind) {
+                        case 224:
+                            var enumDeclaration = node.parent;
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), enumDeclaration.members.length ? enumDeclaration.members[0] : enumDeclaration.getLastToken(sourceFile));
+                        case 221:
+                            var classDeclaration = node.parent;
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), classDeclaration.members.length ? classDeclaration.members[0] : classDeclaration.getLastToken(sourceFile));
+                        case 227:
+                            return spanInNodeIfStartsOnSameLine(node.parent.parent, node.parent.clauses[0]);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInCloseBraceToken(node) {
+                    switch (node.parent.kind) {
+                        case 226:
+                            if (ts.getModuleInstanceState(node.parent.parent) !== 1) {
+                                return undefined;
+                            }
+                        case 224:
+                        case 221:
+                            return textSpan(node);
+                        case 199:
+                            if (ts.isFunctionBlock(node.parent)) {
+                                return textSpan(node);
+                            }
+                        case 252:
+                            return spanInNode(ts.lastOrUndefined(node.parent.statements));
+                        case 227:
+                            var caseBlock = node.parent;
+                            var lastClause = ts.lastOrUndefined(caseBlock.clauses);
+                            if (lastClause) {
+                                return spanInNode(ts.lastOrUndefined(lastClause.statements));
+                            }
+                            return undefined;
+                        case 167:
+                            var bindingPattern = node.parent;
+                            return spanInNode(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
+                        default:
+                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
+                                var objectLiteral = node.parent;
+                                return textSpan(ts.lastOrUndefined(objectLiteral.properties) || objectLiteral);
+                            }
+                            return spanInNode(node.parent);
+                    }
+                }
+                function spanInCloseBracketToken(node) {
+                    switch (node.parent.kind) {
+                        case 168:
+                            var bindingPattern = node.parent;
+                            return textSpan(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
+                        default:
+                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
+                                var arrayLiteral = node.parent;
+                                return textSpan(ts.lastOrUndefined(arrayLiteral.elements) || arrayLiteral);
+                            }
+                            return spanInNode(node.parent);
+                    }
+                }
+                function spanInOpenParenToken(node) {
+                    if (node.parent.kind === 204 ||
+                        node.parent.kind === 174 ||
+                        node.parent.kind === 175) {
+                        return spanInPreviousNode(node);
+                    }
+                    if (node.parent.kind === 178) {
+                        return spanInNextNode(node);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInCloseParenToken(node) {
+                    switch (node.parent.kind) {
+                        case 179:
+                        case 220:
+                        case 180:
+                        case 147:
+                        case 146:
+                        case 149:
+                        case 150:
+                        case 148:
+                        case 205:
+                        case 204:
+                        case 206:
+                        case 208:
+                        case 174:
+                        case 175:
+                        case 178:
+                            return spanInPreviousNode(node);
+                        default:
+                            return spanInNode(node.parent);
+                    }
+                }
+                function spanInColonToken(node) {
+                    if (ts.isFunctionLike(node.parent) ||
+                        node.parent.kind === 253 ||
+                        node.parent.kind === 142) {
+                        return spanInPreviousNode(node);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInGreaterThanOrLessThanToken(node) {
+                    if (node.parent.kind === 177) {
+                        return spanInNextNode(node);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInWhileKeyword(node) {
+                    if (node.parent.kind === 204) {
+                        return textSpanEndingAtNextToken(node, node.parent.expression);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInOfKeyword(node) {
+                    if (node.parent.kind === 208) {
+                        return spanInNextNode(node);
+                    }
+                    return spanInNode(node.parent);
+                }
+            }
+        }
+        BreakpointResolver.spanInSourceFileAtLocation = spanInSourceFileAtLocation;
+    })(BreakpointResolver = ts.BreakpointResolver || (ts.BreakpointResolver = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var OutliningElementsCollector;
+    (function (OutliningElementsCollector) {
+        function collectElements(sourceFile) {
+            var elements = [];
+            var collapseText = "...";
+            function addOutliningSpan(hintSpanNode, startElement, endElement, autoCollapse) {
+                if (hintSpanNode && startElement && endElement) {
+                    var span = {
+                        textSpan: ts.createTextSpanFromBounds(startElement.pos, endElement.end),
+                        hintSpan: ts.createTextSpanFromBounds(hintSpanNode.getStart(), hintSpanNode.end),
+                        bannerText: collapseText,
+                        autoCollapse: autoCollapse
+                    };
+                    elements.push(span);
+                }
+            }
+            function addOutliningSpanComments(commentSpan, autoCollapse) {
+                if (commentSpan) {
+                    var span = {
+                        textSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
+                        hintSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
+                        bannerText: collapseText,
+                        autoCollapse: autoCollapse
+                    };
+                    elements.push(span);
+                }
+            }
+            function addOutliningForLeadingCommentsForNode(n) {
+                var comments = ts.getLeadingCommentRangesOfNode(n, sourceFile);
+                if (comments) {
+                    var firstSingleLineCommentStart = -1;
+                    var lastSingleLineCommentEnd = -1;
+                    var isFirstSingleLineComment = true;
+                    var singleLineCommentCount = 0;
+                    for (var _i = 0, comments_2 = comments; _i < comments_2.length; _i++) {
+                        var currentComment = comments_2[_i];
+                        if (currentComment.kind === 2) {
+                            if (isFirstSingleLineComment) {
+                                firstSingleLineCommentStart = currentComment.pos;
+                            }
+                            isFirstSingleLineComment = false;
+                            lastSingleLineCommentEnd = currentComment.end;
+                            singleLineCommentCount++;
+                        }
+                        else if (currentComment.kind === 3) {
+                            combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
+                            addOutliningSpanComments(currentComment, false);
+                            singleLineCommentCount = 0;
+                            lastSingleLineCommentEnd = -1;
+                            isFirstSingleLineComment = true;
+                        }
+                    }
+                    combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
+                }
+            }
+            function combineAndAddMultipleSingleLineComments(count, start, end) {
+                if (count > 1) {
+                    var multipleSingleLineComments = {
+                        pos: start,
+                        end: end,
+                        kind: 2
+                    };
+                    addOutliningSpanComments(multipleSingleLineComments, false);
+                }
+            }
+            function autoCollapse(node) {
+                return ts.isFunctionBlock(node) && node.parent.kind !== 180;
+            }
+            var depth = 0;
+            var maxDepth = 20;
+            function walk(n) {
+                if (depth > maxDepth) {
+                    return;
+                }
+                if (ts.isDeclaration(n)) {
+                    addOutliningForLeadingCommentsForNode(n);
+                }
+                switch (n.kind) {
+                    case 199:
+                        if (!ts.isFunctionBlock(n)) {
+                            var parent_14 = n.parent;
+                            var openBrace = ts.findChildOfKind(n, 15, sourceFile);
+                            var closeBrace = ts.findChildOfKind(n, 16, sourceFile);
+                            if (parent_14.kind === 204 ||
+                                parent_14.kind === 207 ||
+                                parent_14.kind === 208 ||
+                                parent_14.kind === 206 ||
+                                parent_14.kind === 203 ||
+                                parent_14.kind === 205 ||
+                                parent_14.kind === 212 ||
+                                parent_14.kind === 252) {
+                                addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
+                                break;
+                            }
+                            if (parent_14.kind === 216) {
+                                var tryStatement = parent_14;
+                                if (tryStatement.tryBlock === n) {
+                                    addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
+                                    break;
+                                }
+                                else if (tryStatement.finallyBlock === n) {
+                                    var finallyKeyword = ts.findChildOfKind(tryStatement, 85, sourceFile);
+                                    if (finallyKeyword) {
+                                        addOutliningSpan(finallyKeyword, openBrace, closeBrace, autoCollapse(n));
+                                        break;
+                                    }
+                                }
+                            }
+                            var span = ts.createTextSpanFromBounds(n.getStart(), n.end);
+                            elements.push({
+                                textSpan: span,
+                                hintSpan: span,
+                                bannerText: collapseText,
+                                autoCollapse: autoCollapse(n)
+                            });
+                            break;
+                        }
+                    case 226: {
+                        var openBrace = ts.findChildOfKind(n, 15, sourceFile);
+                        var closeBrace = ts.findChildOfKind(n, 16, sourceFile);
+                        addOutliningSpan(n.parent, openBrace, closeBrace, autoCollapse(n));
+                        break;
+                    }
+                    case 221:
+                    case 222:
+                    case 224:
+                    case 171:
+                    case 227: {
+                        var openBrace = ts.findChildOfKind(n, 15, sourceFile);
+                        var closeBrace = ts.findChildOfKind(n, 16, sourceFile);
+                        addOutliningSpan(n, openBrace, closeBrace, autoCollapse(n));
+                        break;
+                    }
+                    case 170:
+                        var openBracket = ts.findChildOfKind(n, 19, sourceFile);
+                        var closeBracket = ts.findChildOfKind(n, 20, sourceFile);
+                        addOutliningSpan(n, openBracket, closeBracket, autoCollapse(n));
+                        break;
+                }
+                depth++;
+                ts.forEachChild(n, walk);
+                depth--;
+            }
+            walk(sourceFile);
+            return elements;
+        }
+        OutliningElementsCollector.collectElements = collectElements;
+    })(OutliningElementsCollector = ts.OutliningElementsCollector || (ts.OutliningElementsCollector = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var NavigateTo;
+    (function (NavigateTo) {
+        function getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount) {
+            var patternMatcher = ts.createPatternMatcher(searchValue);
+            var rawItems = [];
+            var baseSensitivity = { sensitivity: "base" };
+            ts.forEach(program.getSourceFiles(), function (sourceFile) {
+                cancellationToken.throwIfCancellationRequested();
+                var nameToDeclarations = sourceFile.getNamedDeclarations();
+                for (var name_35 in nameToDeclarations) {
+                    var declarations = ts.getProperty(nameToDeclarations, name_35);
+                    if (declarations) {
+                        var matches = patternMatcher.getMatchesForLastSegmentOfPattern(name_35);
+                        if (!matches) {
+                            continue;
+                        }
+                        for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
+                            var declaration = declarations_7[_i];
+                            if (patternMatcher.patternContainsDots) {
+                                var containers = getContainers(declaration);
+                                if (!containers) {
+                                    return undefined;
+                                }
+                                matches = patternMatcher.getMatches(containers, name_35);
+                                if (!matches) {
+                                    continue;
+                                }
+                            }
+                            var fileName = sourceFile.fileName;
+                            var matchKind = bestMatchKind(matches);
+                            rawItems.push({ name: name_35, fileName: fileName, matchKind: matchKind, isCaseSensitive: allMatchesAreCaseSensitive(matches), declaration: declaration });
+                        }
+                    }
+                }
+            });
+            rawItems = ts.filter(rawItems, function (item) {
+                var decl = item.declaration;
+                if (decl.kind === 231 || decl.kind === 234 || decl.kind === 229) {
+                    var importer = checker.getSymbolAtLocation(decl.name);
+                    var imported = checker.getAliasedSymbol(importer);
+                    return importer.name !== imported.name;
+                }
+                else {
+                    return true;
+                }
+            });
+            rawItems.sort(compareNavigateToItems);
+            if (maxResultCount !== undefined) {
+                rawItems = rawItems.slice(0, maxResultCount);
+            }
+            var items = ts.map(rawItems, createNavigateToItem);
+            return items;
+            function allMatchesAreCaseSensitive(matches) {
+                ts.Debug.assert(matches.length > 0);
+                for (var _i = 0, matches_1 = matches; _i < matches_1.length; _i++) {
+                    var match = matches_1[_i];
+                    if (!match.isCaseSensitive) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            function getTextOfIdentifierOrLiteral(node) {
+                if (node) {
+                    if (node.kind === 69 ||
+                        node.kind === 9 ||
+                        node.kind === 8) {
+                        return node.text;
+                    }
+                }
+                return undefined;
+            }
+            function tryAddSingleDeclarationName(declaration, containers) {
+                if (declaration && declaration.name) {
+                    var text = getTextOfIdentifierOrLiteral(declaration.name);
+                    if (text !== undefined) {
+                        containers.unshift(text);
+                    }
+                    else if (declaration.name.kind === 140) {
+                        return tryAddComputedPropertyName(declaration.name.expression, containers, true);
+                    }
+                    else {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            function tryAddComputedPropertyName(expression, containers, includeLastPortion) {
+                var text = getTextOfIdentifierOrLiteral(expression);
+                if (text !== undefined) {
+                    if (includeLastPortion) {
+                        containers.unshift(text);
+                    }
+                    return true;
+                }
+                if (expression.kind === 172) {
+                    var propertyAccess = expression;
+                    if (includeLastPortion) {
+                        containers.unshift(propertyAccess.name.text);
+                    }
+                    return tryAddComputedPropertyName(propertyAccess.expression, containers, true);
+                }
+                return false;
+            }
+            function getContainers(declaration) {
+                var containers = [];
+                if (declaration.name.kind === 140) {
+                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, false)) {
+                        return undefined;
+                    }
+                }
+                declaration = ts.getContainerNode(declaration);
+                while (declaration) {
+                    if (!tryAddSingleDeclarationName(declaration, containers)) {
+                        return undefined;
+                    }
+                    declaration = ts.getContainerNode(declaration);
+                }
+                return containers;
+            }
+            function bestMatchKind(matches) {
+                ts.Debug.assert(matches.length > 0);
+                var bestMatchKind = ts.PatternMatchKind.camelCase;
+                for (var _i = 0, matches_2 = matches; _i < matches_2.length; _i++) {
+                    var match = matches_2[_i];
+                    var kind = match.kind;
+                    if (kind < bestMatchKind) {
+                        bestMatchKind = kind;
+                    }
+                }
+                return bestMatchKind;
+            }
+            function compareNavigateToItems(i1, i2) {
+                return i1.matchKind - i2.matchKind ||
+                    i1.name.localeCompare(i2.name, undefined, baseSensitivity) ||
+                    i1.name.localeCompare(i2.name);
+            }
+            function createNavigateToItem(rawItem) {
+                var declaration = rawItem.declaration;
+                var container = ts.getContainerNode(declaration);
+                return {
+                    name: rawItem.name,
+                    kind: ts.getNodeKind(declaration),
+                    kindModifiers: ts.getNodeModifiers(declaration),
+                    matchKind: ts.PatternMatchKind[rawItem.matchKind],
+                    isCaseSensitive: rawItem.isCaseSensitive,
+                    fileName: rawItem.fileName,
+                    textSpan: ts.createTextSpanFromBounds(declaration.getStart(), declaration.getEnd()),
+                    containerName: container && container.name ? container.name.text : "",
+                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
+                };
+            }
+        }
+        NavigateTo.getNavigateToItems = getNavigateToItems;
+    })(NavigateTo = ts.NavigateTo || (ts.NavigateTo = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var NavigationBar;
+    (function (NavigationBar) {
+        function getNavigationBarItems(sourceFile, compilerOptions) {
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                return getJsNavigationBarItems(sourceFile, compilerOptions);
+            }
+            return getItemsWorker(getTopLevelNodes(sourceFile), createTopLevelItem);
+            function getIndent(node) {
+                var indent = 1;
+                var current = node.parent;
+                while (current) {
+                    switch (current.kind) {
+                        case 225:
+                            do {
+                                current = current.parent;
+                            } while (current.kind === 225);
+                        case 221:
+                        case 224:
+                        case 222:
+                        case 220:
+                            indent++;
+                    }
+                    current = current.parent;
+                }
+                return indent;
+            }
+            function getChildNodes(nodes) {
+                var childNodes = [];
+                function visit(node) {
+                    switch (node.kind) {
+                        case 200:
+                            ts.forEach(node.declarationList.declarations, visit);
+                            break;
+                        case 167:
+                        case 168:
+                            ts.forEach(node.elements, visit);
+                            break;
+                        case 236:
+                            if (node.exportClause) {
+                                ts.forEach(node.exportClause.elements, visit);
+                            }
+                            break;
+                        case 230:
+                            var importClause = node.importClause;
+                            if (importClause) {
+                                if (importClause.name) {
+                                    childNodes.push(importClause);
+                                }
+                                if (importClause.namedBindings) {
+                                    if (importClause.namedBindings.kind === 232) {
+                                        childNodes.push(importClause.namedBindings);
+                                    }
+                                    else {
+                                        ts.forEach(importClause.namedBindings.elements, visit);
+                                    }
+                                }
+                            }
+                            break;
+                        case 169:
+                        case 218:
+                            if (ts.isBindingPattern(node.name)) {
+                                visit(node.name);
+                                break;
+                            }
+                        case 221:
+                        case 224:
+                        case 222:
+                        case 225:
+                        case 220:
+                        case 229:
+                        case 234:
+                        case 238:
+                        case 223:
+                            childNodes.push(node);
+                            break;
+                    }
+                }
+                ts.forEach(nodes, visit);
+                return sortNodes(childNodes);
+            }
+            function getTopLevelNodes(node) {
+                var topLevelNodes = [];
+                topLevelNodes.push(node);
+                addTopLevelNodes(node.statements, topLevelNodes);
+                return topLevelNodes;
+            }
+            function sortNodes(nodes) {
+                return nodes.slice(0).sort(function (n1, n2) {
+                    if (n1.name && n2.name) {
+                        return localeCompareFix(ts.getPropertyNameForPropertyNameNode(n1.name), ts.getPropertyNameForPropertyNameNode(n2.name));
+                    }
+                    else if (n1.name) {
+                        return 1;
+                    }
+                    else if (n2.name) {
+                        return -1;
+                    }
+                    else {
+                        return n1.kind - n2.kind;
+                    }
+                });
+                function localeCompareFix(a, b) {
+                    var cmp = a.toLowerCase().localeCompare(b.toLowerCase());
+                    if (cmp !== 0)
+                        return cmp;
+                    return a < b ? 1 : a > b ? -1 : 0;
+                }
+            }
+            function addTopLevelNodes(nodes, topLevelNodes) {
+                nodes = sortNodes(nodes);
+                for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
+                    var node = nodes_4[_i];
+                    switch (node.kind) {
+                        case 221:
+                            topLevelNodes.push(node);
+                            for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                                var member = _b[_a];
+                                if (member.kind === 147 || member.kind === 148) {
+                                    if (member.body) {
+                                        if (hasNamedFunctionDeclarations(member.body.statements)) {
+                                            topLevelNodes.push(member);
+                                        }
+                                        addTopLevelNodes(member.body.statements, topLevelNodes);
+                                    }
+                                }
+                            }
+                            break;
+                        case 224:
+                        case 222:
+                        case 223:
+                            topLevelNodes.push(node);
+                            break;
+                        case 225:
+                            var moduleDeclaration = node;
+                            topLevelNodes.push(node);
+                            addTopLevelNodes(getInnermostModule(moduleDeclaration).body.statements, topLevelNodes);
+                            break;
+                        case 220:
+                            var functionDeclaration = node;
+                            if (isTopLevelFunctionDeclaration(functionDeclaration)) {
+                                topLevelNodes.push(node);
+                                addTopLevelNodes(functionDeclaration.body.statements, topLevelNodes);
+                            }
+                            break;
+                    }
+                }
+            }
+            function hasNamedFunctionDeclarations(nodes) {
+                for (var _i = 0, nodes_5 = nodes; _i < nodes_5.length; _i++) {
+                    var s = nodes_5[_i];
+                    if (s.kind === 220 && !isEmpty(s.name.text)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function isTopLevelFunctionDeclaration(functionDeclaration) {
+                if (functionDeclaration.kind === 220) {
+                    if (functionDeclaration.body && functionDeclaration.body.kind === 199) {
+                        if (hasNamedFunctionDeclarations(functionDeclaration.body.statements)) {
+                            return true;
+                        }
+                        if (!ts.isFunctionBlock(functionDeclaration.parent)) {
+                            return true;
+                        }
+                        else {
+                            var grandParentKind = functionDeclaration.parent.parent.kind;
+                            if (grandParentKind === 147 ||
+                                grandParentKind === 148) {
+                                return true;
+                            }
+                        }
+                    }
+                }
+                return false;
+            }
+            function getItemsWorker(nodes, createItem) {
+                var items = [];
+                var keyToItem = {};
+                for (var _i = 0, nodes_6 = nodes; _i < nodes_6.length; _i++) {
+                    var child = nodes_6[_i];
+                    var item = createItem(child);
+                    if (item !== undefined) {
+                        if (item.text.length > 0) {
+                            var key = item.text + "-" + item.kind + "-" + item.indent;
+                            var itemWithSameName = keyToItem[key];
+                            if (itemWithSameName) {
+                                merge(itemWithSameName, item);
+                            }
+                            else {
+                                keyToItem[key] = item;
+                                items.push(item);
+                            }
+                        }
+                    }
+                }
+                return items;
+            }
+            function merge(target, source) {
+                ts.addRange(target.spans, source.spans);
+                if (source.childItems) {
+                    if (!target.childItems) {
+                        target.childItems = [];
+                    }
+                    outer: for (var _i = 0, _a = source.childItems; _i < _a.length; _i++) {
+                        var sourceChild = _a[_i];
+                        for (var _b = 0, _c = target.childItems; _b < _c.length; _b++) {
+                            var targetChild = _c[_b];
+                            if (targetChild.text === sourceChild.text && targetChild.kind === sourceChild.kind) {
+                                merge(targetChild, sourceChild);
+                                continue outer;
+                            }
+                        }
+                        target.childItems.push(sourceChild);
+                    }
+                }
+            }
+            function createChildItem(node) {
+                switch (node.kind) {
+                    case 142:
+                        if (ts.isBindingPattern(node.name)) {
+                            break;
+                        }
+                        if ((node.flags & 1023) === 0) {
+                            return undefined;
+                        }
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 147:
+                    case 146:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberFunctionElement);
+                    case 149:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberGetAccessorElement);
+                    case 150:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberSetAccessorElement);
+                    case 153:
+                        return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
+                    case 224:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.enumElement);
+                    case 255:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 225:
+                        return createItem(node, getModuleName(node), ts.ScriptElementKind.moduleElement);
+                    case 222:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.interfaceElement);
+                    case 223:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.typeElement);
+                    case 151:
+                        return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
+                    case 152:
+                        return createItem(node, "new()", ts.ScriptElementKind.constructSignatureElement);
+                    case 145:
+                    case 144:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 221:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.classElement);
+                    case 220:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.functionElement);
+                    case 218:
+                    case 169:
+                        var variableDeclarationNode = void 0;
+                        var name_36;
+                        if (node.kind === 169) {
+                            name_36 = node.name;
+                            variableDeclarationNode = node;
+                            while (variableDeclarationNode && variableDeclarationNode.kind !== 218) {
+                                variableDeclarationNode = variableDeclarationNode.parent;
+                            }
+                            ts.Debug.assert(variableDeclarationNode !== undefined);
+                        }
+                        else {
+                            ts.Debug.assert(!ts.isBindingPattern(node.name));
+                            variableDeclarationNode = node;
+                            name_36 = node.name;
+                        }
+                        if (ts.isConst(variableDeclarationNode)) {
+                            return createItem(node, getTextOfNode(name_36), ts.ScriptElementKind.constElement);
+                        }
+                        else if (ts.isLet(variableDeclarationNode)) {
+                            return createItem(node, getTextOfNode(name_36), ts.ScriptElementKind.letElement);
+                        }
+                        else {
+                            return createItem(node, getTextOfNode(name_36), ts.ScriptElementKind.variableElement);
+                        }
+                    case 148:
+                        return createItem(node, "constructor", ts.ScriptElementKind.constructorImplementationElement);
+                    case 238:
+                    case 234:
+                    case 229:
+                    case 231:
+                    case 232:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.alias);
+                }
+                return undefined;
+                function createItem(node, name, scriptElementKind) {
+                    return getNavigationBarItem(name, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)]);
+                }
+            }
+            function isEmpty(text) {
+                return !text || text.trim() === "";
+            }
+            function getNavigationBarItem(text, kind, kindModifiers, spans, childItems, indent) {
+                if (childItems === void 0) { childItems = []; }
+                if (indent === void 0) { indent = 0; }
+                if (isEmpty(text)) {
+                    return undefined;
+                }
+                return {
+                    text: text,
+                    kind: kind,
+                    kindModifiers: kindModifiers,
+                    spans: spans,
+                    childItems: childItems,
+                    indent: indent,
+                    bolded: false,
+                    grayed: false
+                };
+            }
+            function createTopLevelItem(node) {
+                switch (node.kind) {
+                    case 256:
+                        return createSourceFileItem(node);
+                    case 221:
+                        return createClassItem(node);
+                    case 147:
+                    case 148:
+                        return createMemberFunctionLikeItem(node);
+                    case 224:
+                        return createEnumItem(node);
+                    case 222:
+                        return createInterfaceItem(node);
+                    case 225:
+                        return createModuleItem(node);
+                    case 220:
+                        return createFunctionItem(node);
+                    case 223:
+                        return createTypeAliasItem(node);
+                }
+                return undefined;
+                function createModuleItem(node) {
+                    var moduleName = getModuleName(node);
+                    var childItems = getItemsWorker(getChildNodes(getInnermostModule(node).body.statements), createChildItem);
+                    return getNavigationBarItem(moduleName, ts.ScriptElementKind.moduleElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+                function createFunctionItem(node) {
+                    if (node.body && node.body.kind === 199) {
+                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
+                        return getNavigationBarItem(!node.name ? "default" : node.name.text, ts.ScriptElementKind.functionElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                    }
+                    return undefined;
+                }
+                function createTypeAliasItem(node) {
+                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.typeElement, ts.getNodeModifiers(node), [getNodeSpan(node)], [], getIndent(node));
+                }
+                function createMemberFunctionLikeItem(node) {
+                    if (node.body && node.body.kind === 199) {
+                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
+                        var scriptElementKind = void 0;
+                        var memberFunctionName = void 0;
+                        if (node.kind === 147) {
+                            memberFunctionName = ts.getPropertyNameForPropertyNameNode(node.name);
+                            scriptElementKind = ts.ScriptElementKind.memberFunctionElement;
+                        }
+                        else {
+                            memberFunctionName = "constructor";
+                            scriptElementKind = ts.ScriptElementKind.constructorImplementationElement;
+                        }
+                        return getNavigationBarItem(memberFunctionName, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                    }
+                    return undefined;
+                }
+                function createSourceFileItem(node) {
+                    var childItems = getItemsWorker(getChildNodes(node.statements), createChildItem);
+                    var rootName = ts.isExternalModule(node)
+                        ? "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(node.fileName)))) + "\""
+                        : "<global>";
+                    return getNavigationBarItem(rootName, ts.ScriptElementKind.moduleElement, ts.ScriptElementKindModifier.none, [getNodeSpan(node)], childItems);
+                }
+                function createClassItem(node) {
+                    var childItems;
+                    if (node.members) {
+                        var constructor = ts.forEach(node.members, function (member) {
+                            return member.kind === 148 && member;
+                        });
+                        var nodes = removeDynamicallyNamedProperties(node);
+                        if (constructor) {
+                            ts.addRange(nodes, ts.filter(constructor.parameters, function (p) { return !ts.isBindingPattern(p.name); }));
+                        }
+                        childItems = getItemsWorker(sortNodes(nodes), createChildItem);
+                    }
+                    var nodeName = !node.name ? "default" : node.name.text;
+                    return getNavigationBarItem(nodeName, ts.ScriptElementKind.classElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+                function createEnumItem(node) {
+                    var childItems = getItemsWorker(sortNodes(removeComputedProperties(node)), createChildItem);
+                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.enumElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+                function createInterfaceItem(node) {
+                    var childItems = getItemsWorker(sortNodes(removeDynamicallyNamedProperties(node)), createChildItem);
+                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.interfaceElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+            }
+            function getModuleName(moduleDeclaration) {
+                if (ts.isAmbientModule(moduleDeclaration)) {
+                    return getTextOfNode(moduleDeclaration.name);
+                }
+                var result = [];
+                result.push(moduleDeclaration.name.text);
+                while (moduleDeclaration.body && moduleDeclaration.body.kind === 225) {
+                    moduleDeclaration = moduleDeclaration.body;
+                    result.push(moduleDeclaration.name.text);
+                }
+                return result.join(".");
+            }
+            function removeComputedProperties(node) {
+                return ts.filter(node.members, function (member) { return member.name === undefined || member.name.kind !== 140; });
+            }
+            function removeDynamicallyNamedProperties(node) {
+                return ts.filter(node.members, function (member) { return !ts.hasDynamicName(member); });
+            }
+            function getInnermostModule(node) {
+                while (node.body.kind === 225) {
+                    node = node.body;
+                }
+                return node;
+            }
+            function getNodeSpan(node) {
+                return node.kind === 256
+                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
+                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
+            }
+            function getTextOfNode(node) {
+                return ts.getTextOfNodeFromSourceText(sourceFile.text, node);
+            }
+        }
+        NavigationBar.getNavigationBarItems = getNavigationBarItems;
+        function getJsNavigationBarItems(sourceFile, compilerOptions) {
+            var anonFnText = "<function>";
+            var anonClassText = "<class>";
+            var indent = 0;
+            var rootName = ts.isExternalModule(sourceFile) ?
+                "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(sourceFile.fileName)))) + "\""
+                : "<global>";
+            var sourceFileItem = getNavBarItem(rootName, ts.ScriptElementKind.moduleElement, [getNodeSpan(sourceFile)]);
+            var topItem = sourceFileItem;
+            ts.forEachChild(sourceFile, visitNode);
+            function visitNode(node) {
+                var newItem = createNavBarItem(node);
+                if (newItem) {
+                    topItem.childItems.push(newItem);
+                }
+                if (node.jsDocComments && node.jsDocComments.length > 0) {
+                    for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        visitNode(jsDocComment);
+                    }
+                }
+                if (newItem && (ts.isFunctionLike(node) || ts.isClassLike(node))) {
+                    var lastTop = topItem;
+                    indent++;
+                    topItem = newItem;
+                    ts.forEachChild(node, visitNode);
+                    topItem = lastTop;
+                    indent--;
+                    if (newItem && newItem.text === anonFnText && newItem.childItems.length === 0) {
+                        topItem.childItems.pop();
+                    }
+                }
+                else {
+                    ts.forEachChild(node, visitNode);
+                }
+            }
+            function createNavBarItem(node) {
+                switch (node.kind) {
+                    case 218:
+                        if (node.parent.parent
+                            .parent.kind !== 256) {
+                            return undefined;
+                        }
+                        var varDecl = node;
+                        if (varDecl.initializer && (varDecl.initializer.kind === 179 ||
+                            varDecl.initializer.kind === 180 ||
+                            varDecl.initializer.kind === 192)) {
+                            return undefined;
+                        }
+                    case 220:
+                    case 221:
+                    case 148:
+                    case 149:
+                    case 150:
+                        var name_37 = node.flags && (node.flags & 512) && !node.name ? "default" :
+                            node.kind === 148 ? "constructor" :
+                                ts.declarationNameToString(node.name);
+                        return getNavBarItem(name_37, getScriptKindForElementKind(node.kind), [getNodeSpan(node)]);
+                    case 179:
+                    case 180:
+                    case 192:
+                        return getDefineModuleItem(node) || getFunctionOrClassExpressionItem(node);
+                    case 147:
+                        var methodDecl = node;
+                        return getNavBarItem(ts.declarationNameToString(methodDecl.name), ts.ScriptElementKind.memberFunctionElement, [getNodeSpan(node)]);
+                    case 235:
+                        return getNavBarItem("default", ts.ScriptElementKind.variableElement, [getNodeSpan(node)]);
+                    case 231:
+                        if (!node.name) {
+                            return undefined;
+                        }
+                    case 234:
+                    case 232:
+                    case 238:
+                        if (node.kind === 238) {
+                            if (!node.parent.parent.moduleSpecifier && !node.propertyName) {
+                                return undefined;
+                            }
+                        }
+                        var decl = node;
+                        if (!decl.name) {
+                            return undefined;
+                        }
+                        var declName = ts.declarationNameToString(decl.name);
+                        return getNavBarItem(declName, ts.ScriptElementKind.constElement, [getNodeSpan(node)]);
+                    case 279:
+                        if (node.name) {
+                            return getNavBarItem(node.name.text, ts.ScriptElementKind.typeElement, [getNodeSpan(node)]);
+                        }
+                        else {
+                            var parentNode = node.parent && node.parent.parent;
+                            if (parentNode && parentNode.kind === 200) {
+                                if (parentNode.declarationList.declarations.length > 0) {
+                                    var nameIdentifier = parentNode.declarationList.declarations[0].name;
+                                    if (nameIdentifier.kind === 69) {
+                                        return getNavBarItem(nameIdentifier.text, ts.ScriptElementKind.typeElement, [getNodeSpan(node)]);
+                                    }
+                                }
+                            }
+                        }
+                    default:
+                        return undefined;
+                }
+            }
+            function getNavBarItem(text, kind, spans, kindModifiers) {
+                if (kindModifiers === void 0) { kindModifiers = ts.ScriptElementKindModifier.none; }
+                return {
+                    text: text, kind: kind, kindModifiers: kindModifiers, spans: spans, childItems: [], indent: indent, bolded: false, grayed: false
+                };
+            }
+            function getDefineModuleItem(node) {
+                if (node.kind !== 179 && node.kind !== 180) {
+                    return undefined;
+                }
+                if (node.parent.kind !== 174) {
+                    return undefined;
+                }
+                var callExpr = node.parent;
+                if (callExpr.expression.kind !== 69 || callExpr.expression.getText() !== "define") {
+                    return undefined;
+                }
+                var defaultName = node.getSourceFile().fileName;
+                if (callExpr.arguments[0].kind === 9) {
+                    defaultName = (callExpr.arguments[0]).text;
+                }
+                return getNavBarItem(defaultName, ts.ScriptElementKind.moduleElement, [getNodeSpan(node.parent)]);
+            }
+            function getFunctionOrClassExpressionItem(node) {
+                if (node.kind !== 179 &&
+                    node.kind !== 180 &&
+                    node.kind !== 192) {
+                    return undefined;
+                }
+                var fnExpr = node;
+                var fnName;
+                if (fnExpr.name && ts.getFullWidth(fnExpr.name) > 0) {
+                    fnName = ts.declarationNameToString(fnExpr.name);
+                }
+                else {
+                    if (fnExpr.parent.kind === 218) {
+                        fnName = ts.declarationNameToString(fnExpr.parent.name);
+                    }
+                    else if (fnExpr.parent.kind === 187 &&
+                        fnExpr.parent.operatorToken.kind === 56) {
+                        fnName = fnExpr.parent.left.getText();
+                    }
+                    else if (fnExpr.parent.kind === 253 &&
+                        fnExpr.parent.name) {
+                        fnName = fnExpr.parent.name.getText();
+                    }
+                    else {
+                        fnName = node.kind === 192 ? anonClassText : anonFnText;
+                    }
+                }
+                var scriptKind = node.kind === 192 ? ts.ScriptElementKind.classElement : ts.ScriptElementKind.functionElement;
+                return getNavBarItem(fnName, scriptKind, [getNodeSpan(node)]);
+            }
+            function getNodeSpan(node) {
+                return node.kind === 256
+                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
+                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
+            }
+            function getScriptKindForElementKind(kind) {
+                switch (kind) {
+                    case 218:
+                        return ts.ScriptElementKind.variableElement;
+                    case 220:
+                        return ts.ScriptElementKind.functionElement;
+                    case 221:
+                        return ts.ScriptElementKind.classElement;
+                    case 148:
+                        return ts.ScriptElementKind.constructorImplementationElement;
+                    case 149:
+                        return ts.ScriptElementKind.memberGetAccessorElement;
+                    case 150:
+                        return ts.ScriptElementKind.memberSetAccessorElement;
+                    default:
+                        return "unknown";
+                }
+            }
+            return sourceFileItem.childItems;
+        }
+        NavigationBar.getJsNavigationBarItems = getJsNavigationBarItems;
+    })(NavigationBar = ts.NavigationBar || (ts.NavigationBar = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    (function (PatternMatchKind) {
+        PatternMatchKind[PatternMatchKind["exact"] = 0] = "exact";
+        PatternMatchKind[PatternMatchKind["prefix"] = 1] = "prefix";
+        PatternMatchKind[PatternMatchKind["substring"] = 2] = "substring";
+        PatternMatchKind[PatternMatchKind["camelCase"] = 3] = "camelCase";
+    })(ts.PatternMatchKind || (ts.PatternMatchKind = {}));
+    var PatternMatchKind = ts.PatternMatchKind;
+    function createPatternMatch(kind, punctuationStripped, isCaseSensitive, camelCaseWeight) {
+        return {
+            kind: kind,
+            punctuationStripped: punctuationStripped,
+            isCaseSensitive: isCaseSensitive,
+            camelCaseWeight: camelCaseWeight
+        };
+    }
+    function createPatternMatcher(pattern) {
+        var stringToWordSpans = {};
+        pattern = pattern.trim();
+        var dotSeparatedSegments = pattern.split(".").map(function (p) { return createSegment(p.trim()); });
+        var invalidPattern = dotSeparatedSegments.length === 0 || ts.forEach(dotSeparatedSegments, segmentIsInvalid);
+        return {
+            getMatches: getMatches,
+            getMatchesForLastSegmentOfPattern: getMatchesForLastSegmentOfPattern,
+            patternContainsDots: dotSeparatedSegments.length > 1
+        };
+        function skipMatch(candidate) {
+            return invalidPattern || !candidate;
+        }
+        function getMatchesForLastSegmentOfPattern(candidate) {
+            if (skipMatch(candidate)) {
+                return undefined;
+            }
+            return matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
+        }
+        function getMatches(candidateContainers, candidate) {
+            if (skipMatch(candidate)) {
+                return undefined;
+            }
+            var candidateMatch = matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
+            if (!candidateMatch) {
+                return undefined;
+            }
+            candidateContainers = candidateContainers || [];
+            if (dotSeparatedSegments.length - 1 > candidateContainers.length) {
+                return undefined;
+            }
+            var totalMatch = candidateMatch;
+            for (var i = dotSeparatedSegments.length - 2, j = candidateContainers.length - 1; i >= 0; i -= 1, j -= 1) {
+                var segment = dotSeparatedSegments[i];
+                var containerName = candidateContainers[j];
+                var containerMatch = matchSegment(containerName, segment);
+                if (!containerMatch) {
+                    return undefined;
+                }
+                ts.addRange(totalMatch, containerMatch);
+            }
+            return totalMatch;
+        }
+        function getWordSpans(word) {
+            if (!ts.hasProperty(stringToWordSpans, word)) {
+                stringToWordSpans[word] = breakIntoWordSpans(word);
+            }
+            return stringToWordSpans[word];
+        }
+        function matchTextChunk(candidate, chunk, punctuationStripped) {
+            var index = indexOfIgnoringCase(candidate, chunk.textLowerCase);
+            if (index === 0) {
+                if (chunk.text.length === candidate.length) {
+                    return createPatternMatch(PatternMatchKind.exact, punctuationStripped, candidate === chunk.text);
+                }
+                else {
+                    return createPatternMatch(PatternMatchKind.prefix, punctuationStripped, startsWith(candidate, chunk.text));
+                }
+            }
+            var isLowercase = chunk.isLowerCase;
+            if (isLowercase) {
+                if (index > 0) {
+                    var wordSpans = getWordSpans(candidate);
+                    for (var _i = 0, wordSpans_1 = wordSpans; _i < wordSpans_1.length; _i++) {
+                        var span = wordSpans_1[_i];
+                        if (partStartsWith(candidate, span, chunk.text, true)) {
+                            return createPatternMatch(PatternMatchKind.substring, punctuationStripped, partStartsWith(candidate, span, chunk.text, false));
+                        }
+                    }
+                }
+            }
+            else {
+                if (candidate.indexOf(chunk.text) > 0) {
+                    return createPatternMatch(PatternMatchKind.substring, punctuationStripped, true);
+                }
+            }
+            if (!isLowercase) {
+                if (chunk.characterSpans.length > 0) {
+                    var candidateParts = getWordSpans(candidate);
+                    var camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, false);
+                    if (camelCaseWeight !== undefined) {
+                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, true, camelCaseWeight);
+                    }
+                    camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, true);
+                    if (camelCaseWeight !== undefined) {
+                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, false, camelCaseWeight);
+                    }
+                }
+            }
+            if (isLowercase) {
+                if (chunk.text.length < candidate.length) {
+                    if (index > 0 && isUpperCaseLetter(candidate.charCodeAt(index))) {
+                        return createPatternMatch(PatternMatchKind.substring, punctuationStripped, false);
+                    }
+                }
+            }
+            return undefined;
+        }
+        function containsSpaceOrAsterisk(text) {
+            for (var i = 0; i < text.length; i++) {
+                var ch = text.charCodeAt(i);
+                if (ch === 32 || ch === 42) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function matchSegment(candidate, segment) {
+            if (!containsSpaceOrAsterisk(segment.totalTextChunk.text)) {
+                var match = matchTextChunk(candidate, segment.totalTextChunk, false);
+                if (match) {
+                    return [match];
+                }
+            }
+            var subWordTextChunks = segment.subWordTextChunks;
+            var matches = undefined;
+            for (var _i = 0, subWordTextChunks_1 = subWordTextChunks; _i < subWordTextChunks_1.length; _i++) {
+                var subWordTextChunk = subWordTextChunks_1[_i];
+                var result = matchTextChunk(candidate, subWordTextChunk, true);
+                if (!result) {
+                    return undefined;
+                }
+                matches = matches || [];
+                matches.push(result);
+            }
+            return matches;
+        }
+        function partStartsWith(candidate, candidateSpan, pattern, ignoreCase, patternSpan) {
+            var patternPartStart = patternSpan ? patternSpan.start : 0;
+            var patternPartLength = patternSpan ? patternSpan.length : pattern.length;
+            if (patternPartLength > candidateSpan.length) {
+                return false;
+            }
+            if (ignoreCase) {
+                for (var i = 0; i < patternPartLength; i++) {
+                    var ch1 = pattern.charCodeAt(patternPartStart + i);
+                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
+                    if (toLowerCase(ch1) !== toLowerCase(ch2)) {
+                        return false;
+                    }
+                }
+            }
+            else {
+                for (var i = 0; i < patternPartLength; i++) {
+                    var ch1 = pattern.charCodeAt(patternPartStart + i);
+                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
+                    if (ch1 !== ch2) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function tryCamelCaseMatch(candidate, candidateParts, chunk, ignoreCase) {
+            var chunkCharacterSpans = chunk.characterSpans;
+            var currentCandidate = 0;
+            var currentChunkSpan = 0;
+            var firstMatch = undefined;
+            var contiguous = undefined;
+            while (true) {
+                if (currentChunkSpan === chunkCharacterSpans.length) {
+                    var weight = 0;
+                    if (contiguous) {
+                        weight += 1;
+                    }
+                    if (firstMatch === 0) {
+                        weight += 2;
+                    }
+                    return weight;
+                }
+                else if (currentCandidate === candidateParts.length) {
+                    return undefined;
+                }
+                var candidatePart = candidateParts[currentCandidate];
+                var gotOneMatchThisCandidate = false;
+                for (; currentChunkSpan < chunkCharacterSpans.length; currentChunkSpan++) {
+                    var chunkCharacterSpan = chunkCharacterSpans[currentChunkSpan];
+                    if (gotOneMatchThisCandidate) {
+                        if (!isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan - 1].start)) ||
+                            !isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan].start))) {
+                            break;
+                        }
+                    }
+                    if (!partStartsWith(candidate, candidatePart, chunk.text, ignoreCase, chunkCharacterSpan)) {
+                        break;
+                    }
+                    gotOneMatchThisCandidate = true;
+                    firstMatch = firstMatch === undefined ? currentCandidate : firstMatch;
+                    contiguous = contiguous === undefined ? true : contiguous;
+                    candidatePart = ts.createTextSpan(candidatePart.start + chunkCharacterSpan.length, candidatePart.length - chunkCharacterSpan.length);
+                }
+                if (!gotOneMatchThisCandidate && contiguous !== undefined) {
+                    contiguous = false;
+                }
+                currentCandidate++;
+            }
+        }
+    }
+    ts.createPatternMatcher = createPatternMatcher;
+    function createSegment(text) {
+        return {
+            totalTextChunk: createTextChunk(text),
+            subWordTextChunks: breakPatternIntoTextChunks(text)
+        };
+    }
+    function segmentIsInvalid(segment) {
+        return segment.subWordTextChunks.length === 0;
+    }
+    function isUpperCaseLetter(ch) {
+        if (ch >= 65 && ch <= 90) {
+            return true;
+        }
+        if (ch < 127 || !ts.isUnicodeIdentifierStart(ch, 2)) {
+            return false;
+        }
+        var str = String.fromCharCode(ch);
+        return str === str.toUpperCase();
+    }
+    function isLowerCaseLetter(ch) {
+        if (ch >= 97 && ch <= 122) {
+            return true;
+        }
+        if (ch < 127 || !ts.isUnicodeIdentifierStart(ch, 2)) {
+            return false;
+        }
+        var str = String.fromCharCode(ch);
+        return str === str.toLowerCase();
+    }
+    function startsWith(string, search) {
+        for (var i = 0, n = search.length; i < n; i++) {
+            if (string.charCodeAt(i) !== search.charCodeAt(i)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function indexOfIgnoringCase(string, value) {
+        for (var i = 0, n = string.length - value.length; i <= n; i++) {
+            if (startsWithIgnoringCase(string, value, i)) {
+                return i;
+            }
+        }
+        return -1;
+    }
+    function startsWithIgnoringCase(string, value, start) {
+        for (var i = 0, n = value.length; i < n; i++) {
+            var ch1 = toLowerCase(string.charCodeAt(i + start));
+            var ch2 = value.charCodeAt(i);
+            if (ch1 !== ch2) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function toLowerCase(ch) {
+        if (ch >= 65 && ch <= 90) {
+            return 97 + (ch - 65);
+        }
+        if (ch < 127) {
+            return ch;
+        }
+        return String.fromCharCode(ch).toLowerCase().charCodeAt(0);
+    }
+    function isDigit(ch) {
+        return ch >= 48 && ch <= 57;
+    }
+    function isWordChar(ch) {
+        return isUpperCaseLetter(ch) || isLowerCaseLetter(ch) || isDigit(ch) || ch === 95 || ch === 36;
+    }
+    function breakPatternIntoTextChunks(pattern) {
+        var result = [];
+        var wordStart = 0;
+        var wordLength = 0;
+        for (var i = 0; i < pattern.length; i++) {
+            var ch = pattern.charCodeAt(i);
+            if (isWordChar(ch)) {
+                if (wordLength === 0) {
+                    wordStart = i;
+                }
+                wordLength++;
+            }
+            else {
+                if (wordLength > 0) {
+                    result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
+                    wordLength = 0;
+                }
+            }
+        }
+        if (wordLength > 0) {
+            result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
+        }
+        return result;
+    }
+    function createTextChunk(text) {
+        var textLowerCase = text.toLowerCase();
+        return {
+            text: text,
+            textLowerCase: textLowerCase,
+            isLowerCase: text === textLowerCase,
+            characterSpans: breakIntoCharacterSpans(text)
+        };
+    }
+    function breakIntoCharacterSpans(identifier) {
+        return breakIntoSpans(identifier, false);
+    }
+    ts.breakIntoCharacterSpans = breakIntoCharacterSpans;
+    function breakIntoWordSpans(identifier) {
+        return breakIntoSpans(identifier, true);
+    }
+    ts.breakIntoWordSpans = breakIntoWordSpans;
+    function breakIntoSpans(identifier, word) {
+        var result = [];
+        var wordStart = 0;
+        for (var i = 1, n = identifier.length; i < n; i++) {
+            var lastIsDigit = isDigit(identifier.charCodeAt(i - 1));
+            var currentIsDigit = isDigit(identifier.charCodeAt(i));
+            var hasTransitionFromLowerToUpper = transitionFromLowerToUpper(identifier, word, i);
+            var hasTransitionFromUpperToLower = transitionFromUpperToLower(identifier, word, i, wordStart);
+            if (charIsPunctuation(identifier.charCodeAt(i - 1)) ||
+                charIsPunctuation(identifier.charCodeAt(i)) ||
+                lastIsDigit !== currentIsDigit ||
+                hasTransitionFromLowerToUpper ||
+                hasTransitionFromUpperToLower) {
+                if (!isAllPunctuation(identifier, wordStart, i)) {
+                    result.push(ts.createTextSpan(wordStart, i - wordStart));
+                }
+                wordStart = i;
+            }
+        }
+        if (!isAllPunctuation(identifier, wordStart, identifier.length)) {
+            result.push(ts.createTextSpan(wordStart, identifier.length - wordStart));
+        }
+        return result;
+    }
+    function charIsPunctuation(ch) {
+        switch (ch) {
+            case 33:
+            case 34:
+            case 35:
+            case 37:
+            case 38:
+            case 39:
+            case 40:
+            case 41:
+            case 42:
+            case 44:
+            case 45:
+            case 46:
+            case 47:
+            case 58:
+            case 59:
+            case 63:
+            case 64:
+            case 91:
+            case 92:
+            case 93:
+            case 95:
+            case 123:
+            case 125:
+                return true;
+        }
+        return false;
+    }
+    function isAllPunctuation(identifier, start, end) {
+        for (var i = start; i < end; i++) {
+            var ch = identifier.charCodeAt(i);
+            if (!charIsPunctuation(ch) || ch === 95 || ch === 36) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function transitionFromUpperToLower(identifier, word, index, wordStart) {
+        if (word) {
+            if (index !== wordStart &&
+                index + 1 < identifier.length) {
+                var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
+                var nextIsLower = isLowerCaseLetter(identifier.charCodeAt(index + 1));
+                if (currentIsUpper && nextIsLower) {
+                    for (var i = wordStart; i < index; i++) {
+                        if (!isUpperCaseLetter(identifier.charCodeAt(i))) {
+                            return false;
+                        }
+                    }
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+    function transitionFromLowerToUpper(identifier, word, index) {
+        var lastIsUpper = isUpperCaseLetter(identifier.charCodeAt(index - 1));
+        var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
+        var transition = word
+            ? (currentIsUpper && !lastIsUpper)
+            : currentIsUpper;
+        return transition;
+    }
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var SignatureHelp;
+    (function (SignatureHelp) {
+        var emptyArray = [];
+        function getSignatureHelpItems(program, sourceFile, position, cancellationToken) {
+            var typeChecker = program.getTypeChecker();
+            var startingToken = ts.findTokenOnLeftOfPosition(sourceFile, position);
+            if (!startingToken) {
+                return undefined;
+            }
+            var argumentInfo = getContainingArgumentInfo(startingToken, position, sourceFile);
+            cancellationToken.throwIfCancellationRequested();
+            if (!argumentInfo) {
+                return undefined;
+            }
+            var call = argumentInfo.invocation;
+            var candidates = [];
+            var resolvedSignature = typeChecker.getResolvedSignature(call, candidates);
+            cancellationToken.throwIfCancellationRequested();
+            if (!candidates.length) {
+                if (ts.isSourceFileJavaScript(sourceFile)) {
+                    return createJavaScriptSignatureHelpItems(argumentInfo, program);
+                }
+                return undefined;
+            }
+            return createSignatureHelpItems(candidates, resolvedSignature, argumentInfo, typeChecker);
+        }
+        SignatureHelp.getSignatureHelpItems = getSignatureHelpItems;
+        function createJavaScriptSignatureHelpItems(argumentInfo, program) {
+            if (argumentInfo.invocation.kind !== 174) {
+                return undefined;
+            }
+            var callExpression = argumentInfo.invocation;
+            var expression = callExpression.expression;
+            var name = expression.kind === 69
+                ? expression
+                : expression.kind === 172
+                    ? expression.name
+                    : undefined;
+            if (!name || !name.text) {
+                return undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            for (var _i = 0, _a = program.getSourceFiles(); _i < _a.length; _i++) {
+                var sourceFile = _a[_i];
+                var nameToDeclarations = sourceFile.getNamedDeclarations();
+                var declarations = ts.getProperty(nameToDeclarations, name.text);
+                if (declarations) {
+                    for (var _b = 0, declarations_8 = declarations; _b < declarations_8.length; _b++) {
+                        var declaration = declarations_8[_b];
+                        var symbol = declaration.symbol;
+                        if (symbol) {
+                            var type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
+                            if (type) {
+                                var callSignatures = type.getCallSignatures();
+                                if (callSignatures && callSignatures.length) {
+                                    return createSignatureHelpItems(callSignatures, callSignatures[0], argumentInfo, typeChecker);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        function getImmediatelyContainingArgumentInfo(node, position, sourceFile) {
+            if (node.parent.kind === 174 || node.parent.kind === 175) {
+                var callExpression = node.parent;
+                if (node.kind === 25 ||
+                    node.kind === 17) {
+                    var list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
+                    var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
+                    ts.Debug.assert(list !== undefined);
+                    return {
+                        kind: isTypeArgList ? 0 : 1,
+                        invocation: callExpression,
+                        argumentsSpan: getApplicableSpanForArguments(list, sourceFile),
+                        argumentIndex: 0,
+                        argumentCount: getArgumentCount(list)
+                    };
+                }
+                var listItemInfo = ts.findListItemInfo(node);
+                if (listItemInfo) {
+                    var list = listItemInfo.list;
+                    var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
+                    var argumentIndex = getArgumentIndex(list, node);
+                    var argumentCount = getArgumentCount(list);
+                    ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
+                    return {
+                        kind: isTypeArgList ? 0 : 1,
+                        invocation: callExpression,
+                        argumentsSpan: getApplicableSpanForArguments(list, sourceFile),
+                        argumentIndex: argumentIndex,
+                        argumentCount: argumentCount
+                    };
+                }
+                return undefined;
+            }
+            else if (node.kind === 11 && node.parent.kind === 176) {
+                if (ts.isInsideTemplateLiteral(node, position)) {
+                    return getArgumentListInfoForTemplate(node.parent, 0, sourceFile);
+                }
+            }
+            else if (node.kind === 12 && node.parent.parent.kind === 176) {
+                var templateExpression = node.parent;
+                var tagExpression = templateExpression.parent;
+                ts.Debug.assert(templateExpression.kind === 189);
+                var argumentIndex = ts.isInsideTemplateLiteral(node, position) ? 0 : 1;
+                return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
+            }
+            else if (node.parent.kind === 197 && node.parent.parent.parent.kind === 176) {
+                var templateSpan = node.parent;
+                var templateExpression = templateSpan.parent;
+                var tagExpression = templateExpression.parent;
+                ts.Debug.assert(templateExpression.kind === 189);
+                if (node.kind === 14 && !ts.isInsideTemplateLiteral(node, position)) {
+                    return undefined;
+                }
+                var spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
+                var argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node, position);
+                return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
+            }
+            return undefined;
+        }
+        function getArgumentIndex(argumentsList, node) {
+            var argumentIndex = 0;
+            var listChildren = argumentsList.getChildren();
+            for (var _i = 0, listChildren_1 = listChildren; _i < listChildren_1.length; _i++) {
+                var child = listChildren_1[_i];
+                if (child === node) {
+                    break;
+                }
+                if (child.kind !== 24) {
+                    argumentIndex++;
+                }
+            }
+            return argumentIndex;
+        }
+        function getArgumentCount(argumentsList) {
+            var listChildren = argumentsList.getChildren();
+            var argumentCount = ts.countWhere(listChildren, function (arg) { return arg.kind !== 24; });
+            if (listChildren.length > 0 && ts.lastOrUndefined(listChildren).kind === 24) {
+                argumentCount++;
+            }
+            return argumentCount;
+        }
+        function getArgumentIndexForTemplatePiece(spanIndex, node, position) {
+            ts.Debug.assert(position >= node.getStart(), "Assumed 'position' could not occur before node.");
+            if (ts.isTemplateLiteralKind(node.kind)) {
+                if (ts.isInsideTemplateLiteral(node, position)) {
+                    return 0;
+                }
+                return spanIndex + 2;
+            }
+            return spanIndex + 1;
+        }
+        function getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile) {
+            var argumentCount = tagExpression.template.kind === 11
+                ? 1
+                : tagExpression.template.templateSpans.length + 1;
+            ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
+            return {
+                kind: 2,
+                invocation: tagExpression,
+                argumentsSpan: getApplicableSpanForTaggedTemplate(tagExpression, sourceFile),
+                argumentIndex: argumentIndex,
+                argumentCount: argumentCount
+            };
+        }
+        function getApplicableSpanForArguments(argumentsList, sourceFile) {
+            var applicableSpanStart = argumentsList.getFullStart();
+            var applicableSpanEnd = ts.skipTrivia(sourceFile.text, argumentsList.getEnd(), false);
+            return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
+        }
+        function getApplicableSpanForTaggedTemplate(taggedTemplate, sourceFile) {
+            var template = taggedTemplate.template;
+            var applicableSpanStart = template.getStart();
+            var applicableSpanEnd = template.getEnd();
+            if (template.kind === 189) {
+                var lastSpan = ts.lastOrUndefined(template.templateSpans);
+                if (lastSpan.literal.getFullWidth() === 0) {
+                    applicableSpanEnd = ts.skipTrivia(sourceFile.text, applicableSpanEnd, false);
+                }
+            }
+            return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
+        }
+        function getContainingArgumentInfo(node, position, sourceFile) {
+            for (var n = node; n.kind !== 256; n = n.parent) {
+                if (ts.isFunctionBlock(n)) {
+                    return undefined;
+                }
+                if (n.pos < n.parent.pos || n.end > n.parent.end) {
+                    ts.Debug.fail("Node of kind " + n.kind + " is not a subspan of its parent of kind " + n.parent.kind);
+                }
+                var argumentInfo = getImmediatelyContainingArgumentInfo(n, position, sourceFile);
+                if (argumentInfo) {
+                    return argumentInfo;
+                }
+            }
+            return undefined;
+        }
+        SignatureHelp.getContainingArgumentInfo = getContainingArgumentInfo;
+        function getChildListThatStartsWithOpenerToken(parent, openerToken, sourceFile) {
+            var children = parent.getChildren(sourceFile);
+            var indexOfOpenerToken = children.indexOf(openerToken);
+            ts.Debug.assert(indexOfOpenerToken >= 0 && children.length > indexOfOpenerToken + 1);
+            return children[indexOfOpenerToken + 1];
+        }
+        function selectBestInvalidOverloadIndex(candidates, argumentCount) {
+            var maxParamsSignatureIndex = -1;
+            var maxParams = -1;
+            for (var i = 0; i < candidates.length; i++) {
+                var candidate = candidates[i];
+                if (candidate.hasRestParameter || candidate.parameters.length >= argumentCount) {
+                    return i;
+                }
+                if (candidate.parameters.length > maxParams) {
+                    maxParams = candidate.parameters.length;
+                    maxParamsSignatureIndex = i;
+                }
+            }
+            return maxParamsSignatureIndex;
+        }
+        function createSignatureHelpItems(candidates, bestSignature, argumentListInfo, typeChecker) {
+            var applicableSpan = argumentListInfo.argumentsSpan;
+            var isTypeParameterList = argumentListInfo.kind === 0;
+            var invocation = argumentListInfo.invocation;
+            var callTarget = ts.getInvokedExpression(invocation);
+            var callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
+            var callTargetDisplayParts = callTargetSymbol && ts.symbolToDisplayParts(typeChecker, callTargetSymbol, undefined, undefined);
+            var items = ts.map(candidates, function (candidateSignature) {
+                var signatureHelpParameters;
+                var prefixDisplayParts = [];
+                var suffixDisplayParts = [];
+                if (callTargetDisplayParts) {
+                    ts.addRange(prefixDisplayParts, callTargetDisplayParts);
+                }
+                if (isTypeParameterList) {
+                    prefixDisplayParts.push(ts.punctuationPart(25));
+                    var typeParameters = candidateSignature.typeParameters;
+                    signatureHelpParameters = typeParameters && typeParameters.length > 0 ? ts.map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
+                    suffixDisplayParts.push(ts.punctuationPart(27));
+                    var parameterParts = ts.mapToDisplayParts(function (writer) {
+                        return typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisType, candidateSignature.parameters, writer, invocation);
+                    });
+                    ts.addRange(suffixDisplayParts, parameterParts);
+                }
+                else {
+                    var typeParameterParts = ts.mapToDisplayParts(function (writer) {
+                        return typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation);
+                    });
+                    ts.addRange(prefixDisplayParts, typeParameterParts);
+                    prefixDisplayParts.push(ts.punctuationPart(17));
+                    var parameters = candidateSignature.parameters;
+                    signatureHelpParameters = parameters.length > 0 ? ts.map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
+                    suffixDisplayParts.push(ts.punctuationPart(18));
+                }
+                var returnTypeParts = ts.mapToDisplayParts(function (writer) {
+                    return typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation);
+                });
+                ts.addRange(suffixDisplayParts, returnTypeParts);
+                return {
+                    isVariadic: candidateSignature.hasRestParameter,
+                    prefixDisplayParts: prefixDisplayParts,
+                    suffixDisplayParts: suffixDisplayParts,
+                    separatorDisplayParts: [ts.punctuationPart(24), ts.spacePart()],
+                    parameters: signatureHelpParameters,
+                    documentation: candidateSignature.getDocumentationComment()
+                };
+            });
+            var argumentIndex = argumentListInfo.argumentIndex;
+            var argumentCount = argumentListInfo.argumentCount;
+            var selectedItemIndex = candidates.indexOf(bestSignature);
+            if (selectedItemIndex < 0) {
+                selectedItemIndex = selectBestInvalidOverloadIndex(candidates, argumentCount);
+            }
+            ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
+            return {
+                items: items,
+                applicableSpan: applicableSpan,
+                selectedItemIndex: selectedItemIndex,
+                argumentIndex: argumentIndex,
+                argumentCount: argumentCount
+            };
+            function createSignatureHelpParameterForParameter(parameter) {
+                var displayParts = ts.mapToDisplayParts(function (writer) {
+                    return typeChecker.getSymbolDisplayBuilder().buildParameterDisplay(parameter, writer, invocation);
+                });
+                return {
+                    name: parameter.name,
+                    documentation: parameter.getDocumentationComment(),
+                    displayParts: displayParts,
+                    isOptional: typeChecker.isOptionalParameter(parameter.valueDeclaration)
+                };
+            }
+            function createSignatureHelpParameterForTypeParameter(typeParameter) {
+                var displayParts = ts.mapToDisplayParts(function (writer) {
+                    return typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(typeParameter, writer, invocation);
+                });
+                return {
+                    name: typeParameter.symbol.name,
+                    documentation: emptyArray,
+                    displayParts: displayParts,
+                    isOptional: false
+                };
+            }
+        }
+    })(SignatureHelp = ts.SignatureHelp || (ts.SignatureHelp = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getLineStartPositionForPosition(position, sourceFile) {
+        var lineStarts = sourceFile.getLineStarts();
+        var line = sourceFile.getLineAndCharacterOfPosition(position).line;
+        return lineStarts[line];
+    }
+    ts.getLineStartPositionForPosition = getLineStartPositionForPosition;
+    function rangeContainsRange(r1, r2) {
+        return startEndContainsRange(r1.pos, r1.end, r2);
+    }
+    ts.rangeContainsRange = rangeContainsRange;
+    function startEndContainsRange(start, end, range) {
+        return start <= range.pos && end >= range.end;
+    }
+    ts.startEndContainsRange = startEndContainsRange;
+    function rangeContainsStartEnd(range, start, end) {
+        return range.pos <= start && range.end >= end;
+    }
+    ts.rangeContainsStartEnd = rangeContainsStartEnd;
+    function rangeOverlapsWithStartEnd(r1, start, end) {
+        return startEndOverlapsWithStartEnd(r1.pos, r1.end, start, end);
+    }
+    ts.rangeOverlapsWithStartEnd = rangeOverlapsWithStartEnd;
+    function startEndOverlapsWithStartEnd(start1, end1, start2, end2) {
+        var start = Math.max(start1, start2);
+        var end = Math.min(end1, end2);
+        return start < end;
+    }
+    ts.startEndOverlapsWithStartEnd = startEndOverlapsWithStartEnd;
+    function positionBelongsToNode(candidate, position, sourceFile) {
+        return candidate.end > position || !isCompletedNode(candidate, sourceFile);
+    }
+    ts.positionBelongsToNode = positionBelongsToNode;
+    function isCompletedNode(n, sourceFile) {
+        if (ts.nodeIsMissing(n)) {
+            return false;
+        }
+        switch (n.kind) {
+            case 221:
+            case 222:
+            case 224:
+            case 171:
+            case 167:
+            case 159:
+            case 199:
+            case 226:
+            case 227:
+                return nodeEndsWith(n, 16, sourceFile);
+            case 252:
+                return isCompletedNode(n.block, sourceFile);
+            case 175:
+                if (!n.arguments) {
+                    return true;
+                }
+            case 174:
+            case 178:
+            case 164:
+                return nodeEndsWith(n, 18, sourceFile);
+            case 156:
+            case 157:
+                return isCompletedNode(n.type, sourceFile);
+            case 148:
+            case 149:
+            case 150:
+            case 220:
+            case 179:
+            case 147:
+            case 146:
+            case 152:
+            case 151:
+            case 180:
+                if (n.body) {
+                    return isCompletedNode(n.body, sourceFile);
+                }
+                if (n.type) {
+                    return isCompletedNode(n.type, sourceFile);
+                }
+                return hasChildOfKind(n, 18, sourceFile);
+            case 225:
+                return n.body && isCompletedNode(n.body, sourceFile);
+            case 203:
+                if (n.elseStatement) {
+                    return isCompletedNode(n.elseStatement, sourceFile);
+                }
+                return isCompletedNode(n.thenStatement, sourceFile);
+            case 202:
+                return isCompletedNode(n.expression, sourceFile) ||
+                    hasChildOfKind(n, 23);
+            case 170:
+            case 168:
+            case 173:
+            case 140:
+            case 161:
+                return nodeEndsWith(n, 20, sourceFile);
+            case 153:
+                if (n.type) {
+                    return isCompletedNode(n.type, sourceFile);
+                }
+                return hasChildOfKind(n, 20, sourceFile);
+            case 249:
+            case 250:
+                return false;
+            case 206:
+            case 207:
+            case 208:
+            case 205:
+                return isCompletedNode(n.statement, sourceFile);
+            case 204:
+                var hasWhileKeyword = findChildOfKind(n, 104, sourceFile);
+                if (hasWhileKeyword) {
+                    return nodeEndsWith(n, 18, sourceFile);
+                }
+                return isCompletedNode(n.statement, sourceFile);
+            case 158:
+                return isCompletedNode(n.exprName, sourceFile);
+            case 182:
+            case 181:
+            case 183:
+            case 190:
+            case 191:
+                var unaryWordExpression = n;
+                return isCompletedNode(unaryWordExpression.expression, sourceFile);
+            case 176:
+                return isCompletedNode(n.template, sourceFile);
+            case 189:
+                var lastSpan = ts.lastOrUndefined(n.templateSpans);
+                return isCompletedNode(lastSpan, sourceFile);
+            case 197:
+                return ts.nodeIsPresent(n.literal);
+            case 185:
+                return isCompletedNode(n.operand, sourceFile);
+            case 187:
+                return isCompletedNode(n.right, sourceFile);
+            case 188:
+                return isCompletedNode(n.whenFalse, sourceFile);
+            default:
+                return true;
+        }
+    }
+    ts.isCompletedNode = isCompletedNode;
+    function nodeEndsWith(n, expectedLastToken, sourceFile) {
+        var children = n.getChildren(sourceFile);
+        if (children.length) {
+            var last = ts.lastOrUndefined(children);
+            if (last.kind === expectedLastToken) {
+                return true;
+            }
+            else if (last.kind === 23 && children.length !== 1) {
+                return children[children.length - 2].kind === expectedLastToken;
+            }
+        }
+        return false;
+    }
+    function findListItemInfo(node) {
+        var list = findContainingList(node);
+        if (!list) {
+            return undefined;
+        }
+        var children = list.getChildren();
+        var listItemIndex = ts.indexOf(children, node);
+        return {
+            listItemIndex: listItemIndex,
+            list: list
+        };
+    }
+    ts.findListItemInfo = findListItemInfo;
+    function hasChildOfKind(n, kind, sourceFile) {
+        return !!findChildOfKind(n, kind, sourceFile);
+    }
+    ts.hasChildOfKind = hasChildOfKind;
+    function findChildOfKind(n, kind, sourceFile) {
+        return ts.forEach(n.getChildren(sourceFile), function (c) { return c.kind === kind && c; });
+    }
+    ts.findChildOfKind = findChildOfKind;
+    function findContainingList(node) {
+        var syntaxList = ts.forEach(node.parent.getChildren(), function (c) {
+            if (c.kind === 282 && c.pos <= node.pos && c.end >= node.end) {
+                return c;
+            }
+        });
+        ts.Debug.assert(!syntaxList || ts.contains(syntaxList.getChildren(), node));
+        return syntaxList;
+    }
+    ts.findContainingList = findContainingList;
+    function getTouchingWord(sourceFile, position, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTouchingToken(sourceFile, position, function (n) { return isWord(n.kind); }, includeJsDocComment);
+    }
+    ts.getTouchingWord = getTouchingWord;
+    function getTouchingPropertyName(sourceFile, position, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTouchingToken(sourceFile, position, function (n) { return isPropertyName(n.kind); }, includeJsDocComment);
+    }
+    ts.getTouchingPropertyName = getTouchingPropertyName;
+    function getTouchingToken(sourceFile, position, includeItemAtEndPosition, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTokenAtPositionWorker(sourceFile, position, false, includeItemAtEndPosition, includeJsDocComment);
+    }
+    ts.getTouchingToken = getTouchingToken;
+    function getTokenAtPosition(sourceFile, position, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTokenAtPositionWorker(sourceFile, position, true, undefined, includeJsDocComment);
+    }
+    ts.getTokenAtPosition = getTokenAtPosition;
+    function getTokenAtPositionWorker(sourceFile, position, allowPositionInLeadingTrivia, includeItemAtEndPosition, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        var current = sourceFile;
+        outer: while (true) {
+            if (isToken(current)) {
+                return current;
+            }
+            if (includeJsDocComment) {
+                var jsDocChildren = ts.filter(current.getChildren(), ts.isJSDocNode);
+                for (var _i = 0, jsDocChildren_1 = jsDocChildren; _i < jsDocChildren_1.length; _i++) {
+                    var jsDocChild = jsDocChildren_1[_i];
+                    var start = allowPositionInLeadingTrivia ? jsDocChild.getFullStart() : jsDocChild.getStart(sourceFile, includeJsDocComment);
+                    if (start <= position) {
+                        var end = jsDocChild.getEnd();
+                        if (position < end || (position === end && jsDocChild.kind === 1)) {
+                            current = jsDocChild;
+                            continue outer;
+                        }
+                        else if (includeItemAtEndPosition && end === position) {
+                            var previousToken = findPrecedingToken(position, sourceFile, jsDocChild);
+                            if (previousToken && includeItemAtEndPosition(previousToken)) {
+                                return previousToken;
+                            }
+                        }
+                    }
+                }
+            }
+            for (var i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
+                var child = current.getChildAt(i);
+                if (ts.isJSDocNode(child)) {
+                    continue;
+                }
+                var start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile, includeJsDocComment);
+                if (start <= position) {
+                    var end = child.getEnd();
+                    if (position < end || (position === end && child.kind === 1)) {
+                        current = child;
+                        continue outer;
+                    }
+                    else if (includeItemAtEndPosition && end === position) {
+                        var previousToken = findPrecedingToken(position, sourceFile, child);
+                        if (previousToken && includeItemAtEndPosition(previousToken)) {
+                            return previousToken;
+                        }
+                    }
+                }
+            }
+            return current;
+        }
+    }
+    function findTokenOnLeftOfPosition(file, position) {
+        var tokenAtPosition = getTokenAtPosition(file, position);
+        if (isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
+            return tokenAtPosition;
+        }
+        return findPrecedingToken(position, file);
+    }
+    ts.findTokenOnLeftOfPosition = findTokenOnLeftOfPosition;
+    function findNextToken(previousToken, parent) {
+        return find(parent);
+        function find(n) {
+            if (isToken(n) && n.pos === previousToken.end) {
+                return n;
+            }
+            var children = n.getChildren();
+            for (var _i = 0, children_1 = children; _i < children_1.length; _i++) {
+                var child = children_1[_i];
+                var shouldDiveInChildNode = (child.pos <= previousToken.pos && child.end > previousToken.end) ||
+                    (child.pos === previousToken.end);
+                if (shouldDiveInChildNode && nodeHasTokens(child)) {
+                    return find(child);
+                }
+            }
+            return undefined;
+        }
+    }
+    ts.findNextToken = findNextToken;
+    function findPrecedingToken(position, sourceFile, startNode) {
+        return find(startNode || sourceFile);
+        function findRightmostToken(n) {
+            if (isToken(n) || n.kind === 244) {
+                return n;
+            }
+            var children = n.getChildren();
+            var candidate = findRightmostChildNodeWithTokens(children, children.length);
+            return candidate && findRightmostToken(candidate);
+        }
+        function find(n) {
+            if (isToken(n) || n.kind === 244) {
+                return n;
+            }
+            var children = n.getChildren();
+            for (var i = 0, len = children.length; i < len; i++) {
+                var child = children[i];
+                if (position < child.end && (nodeHasTokens(child) || child.kind === 244)) {
+                    var start = child.getStart(sourceFile);
+                    var lookInPreviousChild = (start >= position) ||
+                        (child.kind === 244 && start === child.end);
+                    if (lookInPreviousChild) {
+                        var candidate = findRightmostChildNodeWithTokens(children, i);
+                        return candidate && findRightmostToken(candidate);
+                    }
+                    else {
+                        return find(child);
+                    }
+                }
+            }
+            ts.Debug.assert(startNode !== undefined || n.kind === 256);
+            if (children.length) {
+                var candidate = findRightmostChildNodeWithTokens(children, children.length);
+                return candidate && findRightmostToken(candidate);
+            }
+        }
+        function findRightmostChildNodeWithTokens(children, exclusiveStartPosition) {
+            for (var i = exclusiveStartPosition - 1; i >= 0; i--) {
+                if (nodeHasTokens(children[i])) {
+                    return children[i];
+                }
+            }
+        }
+    }
+    ts.findPrecedingToken = findPrecedingToken;
+    function isInString(sourceFile, position) {
+        var previousToken = findPrecedingToken(position, sourceFile);
+        if (previousToken &&
+            (previousToken.kind === 9 || previousToken.kind === 166)) {
+            var start = previousToken.getStart();
+            var end = previousToken.getEnd();
+            if (start < position && position < end) {
+                return true;
+            }
+            if (position === end) {
+                return !!previousToken.isUnterminated;
+            }
+        }
+        return false;
+    }
+    ts.isInString = isInString;
+    function isInComment(sourceFile, position) {
+        return isInCommentHelper(sourceFile, position, undefined);
+    }
+    ts.isInComment = isInComment;
+    function isInsideJsxElementOrAttribute(sourceFile, position) {
+        var token = getTokenAtPosition(sourceFile, position);
+        if (!token) {
+            return false;
+        }
+        if (token.kind === 244) {
+            return true;
+        }
+        if (token.kind === 25 && token.parent.kind === 244) {
+            return true;
+        }
+        if (token.kind === 25 && token.parent.kind === 248) {
+            return true;
+        }
+        if (token && token.kind === 16 && token.parent.kind === 248) {
+            return true;
+        }
+        if (token.kind === 25 && token.parent.kind === 245) {
+            return true;
+        }
+        return false;
+    }
+    ts.isInsideJsxElementOrAttribute = isInsideJsxElementOrAttribute;
+    function isInTemplateString(sourceFile, position) {
+        var token = getTokenAtPosition(sourceFile, position);
+        return ts.isTemplateLiteralKind(token.kind) && position > token.getStart(sourceFile);
+    }
+    ts.isInTemplateString = isInTemplateString;
+    function isInCommentHelper(sourceFile, position, predicate) {
+        var token = getTokenAtPosition(sourceFile, position);
+        if (token && position <= token.getStart(sourceFile)) {
+            var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
+            return predicate ?
+                ts.forEach(commentRanges, function (c) { return c.pos < position &&
+                    (c.kind == 2 ? position <= c.end : position < c.end) &&
+                    predicate(c); }) :
+                ts.forEach(commentRanges, function (c) { return c.pos < position &&
+                    (c.kind == 2 ? position <= c.end : position < c.end); });
+        }
+        return false;
+    }
+    ts.isInCommentHelper = isInCommentHelper;
+    function hasDocComment(sourceFile, position) {
+        var token = getTokenAtPosition(sourceFile, position);
+        var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
+        return ts.forEach(commentRanges, jsDocPrefix);
+        function jsDocPrefix(c) {
+            var text = sourceFile.text;
+            return text.length >= c.pos + 3 && text[c.pos] === "/" && text[c.pos + 1] === "*" && text[c.pos + 2] === "*";
+        }
+    }
+    ts.hasDocComment = hasDocComment;
+    function getJsDocTagAtPosition(sourceFile, position) {
+        var node = ts.getTokenAtPosition(sourceFile, position);
+        if (isToken(node)) {
+            switch (node.kind) {
+                case 102:
+                case 108:
+                case 74:
+                    node = node.parent === undefined ? undefined : node.parent.parent;
+                    break;
+                default:
+                    node = node.parent;
+                    break;
+            }
+        }
+        if (node) {
+            if (node.jsDocComments) {
+                for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                    var jsDocComment = _a[_i];
+                    for (var _b = 0, _c = jsDocComment.tags; _b < _c.length; _b++) {
+                        var tag = _c[_b];
+                        if (tag.pos <= position && position <= tag.end) {
+                            return tag;
+                        }
+                    }
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getJsDocTagAtPosition = getJsDocTagAtPosition;
+    function nodeHasTokens(n) {
+        return n.getWidth() !== 0;
+    }
+    function getNodeModifiers(node) {
+        var flags = ts.getCombinedNodeFlags(node);
+        var result = [];
+        if (flags & 8)
+            result.push(ts.ScriptElementKindModifier.privateMemberModifier);
+        if (flags & 16)
+            result.push(ts.ScriptElementKindModifier.protectedMemberModifier);
+        if (flags & 4)
+            result.push(ts.ScriptElementKindModifier.publicMemberModifier);
+        if (flags & 32)
+            result.push(ts.ScriptElementKindModifier.staticModifier);
+        if (flags & 128)
+            result.push(ts.ScriptElementKindModifier.abstractModifier);
+        if (flags & 1)
+            result.push(ts.ScriptElementKindModifier.exportedModifier);
+        if (ts.isInAmbientContext(node))
+            result.push(ts.ScriptElementKindModifier.ambientModifier);
+        return result.length > 0 ? result.join(",") : ts.ScriptElementKindModifier.none;
+    }
+    ts.getNodeModifiers = getNodeModifiers;
+    function getTypeArgumentOrTypeParameterList(node) {
+        if (node.kind === 155 || node.kind === 174) {
+            return node.typeArguments;
+        }
+        if (ts.isFunctionLike(node) || node.kind === 221 || node.kind === 222) {
+            return node.typeParameters;
+        }
+        return undefined;
+    }
+    ts.getTypeArgumentOrTypeParameterList = getTypeArgumentOrTypeParameterList;
+    function isToken(n) {
+        return n.kind >= 0 && n.kind <= 138;
+    }
+    ts.isToken = isToken;
+    function isWord(kind) {
+        return kind === 69 || ts.isKeyword(kind);
+    }
+    ts.isWord = isWord;
+    function isPropertyName(kind) {
+        return kind === 9 || kind === 8 || isWord(kind);
+    }
+    function isComment(kind) {
+        return kind === 2 || kind === 3;
+    }
+    ts.isComment = isComment;
+    function isStringOrRegularExpressionOrTemplateLiteral(kind) {
+        if (kind === 9
+            || kind === 166
+            || kind === 10
+            || ts.isTemplateLiteralKind(kind)) {
+            return true;
+        }
+        return false;
+    }
+    ts.isStringOrRegularExpressionOrTemplateLiteral = isStringOrRegularExpressionOrTemplateLiteral;
+    function isPunctuation(kind) {
+        return 15 <= kind && kind <= 68;
+    }
+    ts.isPunctuation = isPunctuation;
+    function isInsideTemplateLiteral(node, position) {
+        return ts.isTemplateLiteralKind(node.kind)
+            && (node.getStart() < position && position < node.getEnd()) || (!!node.isUnterminated && position === node.getEnd());
+    }
+    ts.isInsideTemplateLiteral = isInsideTemplateLiteral;
+    function isAccessibilityModifier(kind) {
+        switch (kind) {
+            case 112:
+            case 110:
+            case 111:
+                return true;
+        }
+        return false;
+    }
+    ts.isAccessibilityModifier = isAccessibilityModifier;
+    function compareDataObjects(dst, src) {
+        for (var e in dst) {
+            if (typeof dst[e] === "object") {
+                if (!compareDataObjects(dst[e], src[e])) {
+                    return false;
+                }
+            }
+            else if (typeof dst[e] !== "function") {
+                if (dst[e] !== src[e]) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+    ts.compareDataObjects = compareDataObjects;
+    function isArrayLiteralOrObjectLiteralDestructuringPattern(node) {
+        if (node.kind === 170 ||
+            node.kind === 171) {
+            if (node.parent.kind === 187 &&
+                node.parent.left === node &&
+                node.parent.operatorToken.kind === 56) {
+                return true;
+            }
+            if (node.parent.kind === 208 &&
+                node.parent.initializer === node) {
+                return true;
+            }
+            if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.kind === 253 ? node.parent.parent : node.parent)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.isArrayLiteralOrObjectLiteralDestructuringPattern = isArrayLiteralOrObjectLiteralDestructuringPattern;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function isFirstDeclarationOfSymbolParameter(symbol) {
+        return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === 142;
+    }
+    ts.isFirstDeclarationOfSymbolParameter = isFirstDeclarationOfSymbolParameter;
+    var displayPartWriter = getDisplayPartWriter();
+    function getDisplayPartWriter() {
+        var displayParts;
+        var lineStart;
+        var indent;
+        resetWriter();
+        return {
+            displayParts: function () { return displayParts; },
+            writeKeyword: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.keyword); },
+            writeOperator: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.operator); },
+            writePunctuation: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.punctuation); },
+            writeSpace: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.space); },
+            writeStringLiteral: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.stringLiteral); },
+            writeParameter: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.parameterName); },
+            writeSymbol: writeSymbol,
+            writeLine: writeLine,
+            increaseIndent: function () { indent++; },
+            decreaseIndent: function () { indent--; },
+            clear: resetWriter,
+            trackSymbol: function () { },
+            reportInaccessibleThisError: function () { }
+        };
+        function writeIndent() {
+            if (lineStart) {
+                var indentString = ts.getIndentString(indent);
+                if (indentString) {
+                    displayParts.push(displayPart(indentString, ts.SymbolDisplayPartKind.space));
+                }
+                lineStart = false;
+            }
+        }
+        function writeKind(text, kind) {
+            writeIndent();
+            displayParts.push(displayPart(text, kind));
+        }
+        function writeSymbol(text, symbol) {
+            writeIndent();
+            displayParts.push(symbolPart(text, symbol));
+        }
+        function writeLine() {
+            displayParts.push(lineBreakPart());
+            lineStart = true;
+        }
+        function resetWriter() {
+            displayParts = [];
+            lineStart = true;
+            indent = 0;
+        }
+    }
+    function symbolPart(text, symbol) {
+        return displayPart(text, displayPartKind(symbol), symbol);
+        function displayPartKind(symbol) {
+            var flags = symbol.flags;
+            if (flags & 3) {
+                return isFirstDeclarationOfSymbolParameter(symbol) ? ts.SymbolDisplayPartKind.parameterName : ts.SymbolDisplayPartKind.localName;
+            }
+            else if (flags & 4) {
+                return ts.SymbolDisplayPartKind.propertyName;
+            }
+            else if (flags & 32768) {
+                return ts.SymbolDisplayPartKind.propertyName;
+            }
+            else if (flags & 65536) {
+                return ts.SymbolDisplayPartKind.propertyName;
+            }
+            else if (flags & 8) {
+                return ts.SymbolDisplayPartKind.enumMemberName;
+            }
+            else if (flags & 16) {
+                return ts.SymbolDisplayPartKind.functionName;
+            }
+            else if (flags & 32) {
+                return ts.SymbolDisplayPartKind.className;
+            }
+            else if (flags & 64) {
+                return ts.SymbolDisplayPartKind.interfaceName;
+            }
+            else if (flags & 384) {
+                return ts.SymbolDisplayPartKind.enumName;
+            }
+            else if (flags & 1536) {
+                return ts.SymbolDisplayPartKind.moduleName;
+            }
+            else if (flags & 8192) {
+                return ts.SymbolDisplayPartKind.methodName;
+            }
+            else if (flags & 262144) {
+                return ts.SymbolDisplayPartKind.typeParameterName;
+            }
+            else if (flags & 524288) {
+                return ts.SymbolDisplayPartKind.aliasName;
+            }
+            else if (flags & 8388608) {
+                return ts.SymbolDisplayPartKind.aliasName;
+            }
+            return ts.SymbolDisplayPartKind.text;
+        }
+    }
+    ts.symbolPart = symbolPart;
+    function displayPart(text, kind, symbol) {
+        return {
+            text: text,
+            kind: ts.SymbolDisplayPartKind[kind]
+        };
+    }
+    ts.displayPart = displayPart;
+    function spacePart() {
+        return displayPart(" ", ts.SymbolDisplayPartKind.space);
+    }
+    ts.spacePart = spacePart;
+    function keywordPart(kind) {
+        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.keyword);
+    }
+    ts.keywordPart = keywordPart;
+    function punctuationPart(kind) {
+        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.punctuation);
+    }
+    ts.punctuationPart = punctuationPart;
+    function operatorPart(kind) {
+        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.operator);
+    }
+    ts.operatorPart = operatorPart;
+    function textOrKeywordPart(text) {
+        var kind = ts.stringToToken(text);
+        return kind === undefined
+            ? textPart(text)
+            : keywordPart(kind);
+    }
+    ts.textOrKeywordPart = textOrKeywordPart;
+    function textPart(text) {
+        return displayPart(text, ts.SymbolDisplayPartKind.text);
+    }
+    ts.textPart = textPart;
+    var carriageReturnLineFeed = "\r\n";
+    function getNewLineOrDefaultFromHost(host) {
+        return host.getNewLine ? host.getNewLine() : carriageReturnLineFeed;
+    }
+    ts.getNewLineOrDefaultFromHost = getNewLineOrDefaultFromHost;
+    function lineBreakPart() {
+        return displayPart("\n", ts.SymbolDisplayPartKind.lineBreak);
+    }
+    ts.lineBreakPart = lineBreakPart;
+    function mapToDisplayParts(writeDisplayParts) {
+        writeDisplayParts(displayPartWriter);
+        var result = displayPartWriter.displayParts();
+        displayPartWriter.clear();
+        return result;
+    }
+    ts.mapToDisplayParts = mapToDisplayParts;
+    function typeToDisplayParts(typechecker, type, enclosingDeclaration, flags) {
+        return mapToDisplayParts(function (writer) {
+            typechecker.getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        });
+    }
+    ts.typeToDisplayParts = typeToDisplayParts;
+    function symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration, meaning, flags) {
+        return mapToDisplayParts(function (writer) {
+            typeChecker.getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags);
+        });
+    }
+    ts.symbolToDisplayParts = symbolToDisplayParts;
+    function signatureToDisplayParts(typechecker, signature, enclosingDeclaration, flags) {
+        return mapToDisplayParts(function (writer) {
+            typechecker.getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags);
+        });
+    }
+    ts.signatureToDisplayParts = signatureToDisplayParts;
+    function getDeclaredName(typeChecker, symbol, location) {
+        if (isImportOrExportSpecifierName(location)) {
+            return location.getText();
+        }
+        else if (ts.isStringOrNumericLiteral(location.kind) &&
+            location.parent.kind === 140) {
+            return location.text;
+        }
+        var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
+        var name = typeChecker.symbolToString(localExportDefaultSymbol || symbol);
+        return name;
+    }
+    ts.getDeclaredName = getDeclaredName;
+    function isImportOrExportSpecifierName(location) {
+        return location.parent &&
+            (location.parent.kind === 234 || location.parent.kind === 238) &&
+            location.parent.propertyName === location;
+    }
+    ts.isImportOrExportSpecifierName = isImportOrExportSpecifierName;
+    function stripQuotes(name) {
+        var length = name.length;
+        if (length >= 2 &&
+            name.charCodeAt(0) === name.charCodeAt(length - 1) &&
+            (name.charCodeAt(0) === 34 || name.charCodeAt(0) === 39)) {
+            return name.substring(1, length - 1);
+        }
+        ;
+        return name;
+    }
+    ts.stripQuotes = stripQuotes;
+    function scriptKindIs(fileName, host) {
+        var scriptKinds = [];
+        for (var _i = 2; _i < arguments.length; _i++) {
+            scriptKinds[_i - 2] = arguments[_i];
+        }
+        var scriptKind = getScriptKind(fileName, host);
+        return ts.forEach(scriptKinds, function (k) { return k === scriptKind; });
+    }
+    ts.scriptKindIs = scriptKindIs;
+    function getScriptKind(fileName, host) {
+        var scriptKind;
+        if (host && host.getScriptKind) {
+            scriptKind = host.getScriptKind(fileName);
+        }
+        if (!scriptKind || scriptKind === 0) {
+            scriptKind = ts.getScriptKindFromFileName(fileName);
+        }
+        return ts.ensureScriptKind(fileName, scriptKind);
+    }
+    ts.getScriptKind = getScriptKind;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var JsTyping;
+    (function (JsTyping) {
+        ;
+        ;
+        var safeList;
+        function discoverTypings(host, fileNames, projectRootPath, safeListPath, packageNameToTypingLocation, typingOptions, compilerOptions) {
+            var inferredTypings = {};
+            if (!typingOptions || !typingOptions.enableAutoDiscovery) {
+                return { cachedTypingPaths: [], newTypingNames: [], filesToWatch: [] };
+            }
+            fileNames = ts.filter(ts.map(fileNames, ts.normalizePath), function (f) { return ts.scriptKindIs(f, undefined, 1, 2); });
+            if (!safeList) {
+                var result = ts.readConfigFile(safeListPath, function (path) { return host.readFile(path); });
+                if (result.config) {
+                    safeList = result.config;
+                }
+                else {
+                    safeList = {};
+                }
+                ;
+            }
+            var filesToWatch = [];
+            var searchDirs = [];
+            var exclude = [];
+            mergeTypings(typingOptions.include);
+            exclude = typingOptions.exclude || [];
+            var possibleSearchDirs = ts.map(fileNames, ts.getDirectoryPath);
+            if (projectRootPath !== undefined) {
+                possibleSearchDirs.push(projectRootPath);
+            }
+            searchDirs = ts.deduplicate(possibleSearchDirs);
+            for (var _i = 0, searchDirs_1 = searchDirs; _i < searchDirs_1.length; _i++) {
+                var searchDir = searchDirs_1[_i];
+                var packageJsonPath = ts.combinePaths(searchDir, "package.json");
+                getTypingNamesFromJson(packageJsonPath, filesToWatch);
+                var bowerJsonPath = ts.combinePaths(searchDir, "bower.json");
+                getTypingNamesFromJson(bowerJsonPath, filesToWatch);
+                var nodeModulesPath = ts.combinePaths(searchDir, "node_modules");
+                getTypingNamesFromNodeModuleFolder(nodeModulesPath);
+            }
+            getTypingNamesFromSourceFileNames(fileNames);
+            for (var name_38 in packageNameToTypingLocation) {
+                if (ts.hasProperty(inferredTypings, name_38) && !inferredTypings[name_38]) {
+                    inferredTypings[name_38] = packageNameToTypingLocation[name_38];
+                }
+            }
+            for (var _a = 0, exclude_1 = exclude; _a < exclude_1.length; _a++) {
+                var excludeTypingName = exclude_1[_a];
+                delete inferredTypings[excludeTypingName];
+            }
+            var newTypingNames = [];
+            var cachedTypingPaths = [];
+            for (var typing in inferredTypings) {
+                if (inferredTypings[typing] !== undefined) {
+                    cachedTypingPaths.push(inferredTypings[typing]);
+                }
+                else {
+                    newTypingNames.push(typing);
+                }
+            }
+            return { cachedTypingPaths: cachedTypingPaths, newTypingNames: newTypingNames, filesToWatch: filesToWatch };
+            function mergeTypings(typingNames) {
+                if (!typingNames) {
+                    return;
+                }
+                for (var _i = 0, typingNames_1 = typingNames; _i < typingNames_1.length; _i++) {
+                    var typing = typingNames_1[_i];
+                    if (!ts.hasProperty(inferredTypings, typing)) {
+                        inferredTypings[typing] = undefined;
+                    }
+                }
+            }
+            function getTypingNamesFromJson(jsonPath, filesToWatch) {
+                var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); });
+                if (result.config) {
+                    var jsonConfig = result.config;
+                    filesToWatch.push(jsonPath);
+                    if (jsonConfig.dependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.dependencies));
+                    }
+                    if (jsonConfig.devDependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.devDependencies));
+                    }
+                    if (jsonConfig.optionalDependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.optionalDependencies));
+                    }
+                    if (jsonConfig.peerDependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.peerDependencies));
+                    }
+                }
+            }
+            function getTypingNamesFromSourceFileNames(fileNames) {
+                var jsFileNames = ts.filter(fileNames, ts.hasJavaScriptFileExtension);
+                var inferredTypingNames = ts.map(jsFileNames, function (f) { return ts.removeFileExtension(ts.getBaseFileName(f.toLowerCase())); });
+                var cleanedTypingNames = ts.map(inferredTypingNames, function (f) { return f.replace(/((?:\.|-)min(?=\.|$))|((?:-|\.)\d+)/g, ""); });
+                if (safeList === undefined) {
+                    mergeTypings(cleanedTypingNames);
+                }
+                else {
+                    mergeTypings(ts.filter(cleanedTypingNames, function (f) { return ts.hasProperty(safeList, f); }));
+                }
+                var hasJsxFile = ts.forEach(fileNames, function (f) { return ts.scriptKindIs(f, undefined, 2); });
+                if (hasJsxFile) {
+                    mergeTypings(["react"]);
+                }
+            }
+            function getTypingNamesFromNodeModuleFolder(nodeModulesPath) {
+                if (!host.directoryExists(nodeModulesPath)) {
+                    return;
+                }
+                var typingNames = [];
+                var fileNames = host.readDirectory(nodeModulesPath, "*.json", undefined, 2);
+                for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
+                    var fileName = fileNames_1[_i];
+                    var normalizedFileName = ts.normalizePath(fileName);
+                    if (ts.getBaseFileName(normalizedFileName) !== "package.json") {
+                        continue;
+                    }
+                    var result = ts.readConfigFile(normalizedFileName, function (path) { return host.readFile(path); });
+                    if (!result.config) {
+                        continue;
+                    }
+                    var packageJson = result.config;
+                    if (packageJson._requiredBy &&
+                        ts.filter(packageJson._requiredBy, function (r) { return r[0] === "#" || r === "/"; }).length === 0) {
+                        continue;
+                    }
+                    if (!packageJson.name) {
+                        continue;
+                    }
+                    if (packageJson.typings) {
+                        var absolutePath = ts.getNormalizedAbsolutePath(packageJson.typings, ts.getDirectoryPath(normalizedFileName));
+                        inferredTypings[packageJson.name] = absolutePath;
+                    }
+                    else {
+                        typingNames.push(packageJson.name);
+                    }
+                }
+                mergeTypings(typingNames);
+            }
+        }
+        JsTyping.discoverTypings = discoverTypings;
+    })(JsTyping = ts.JsTyping || (ts.JsTyping = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var standardScanner = ts.createScanner(2, false, 0);
+        var jsxScanner = ts.createScanner(2, false, 1);
+        var scanner;
+        function getFormattingScanner(sourceFile, startPos, endPos) {
+            ts.Debug.assert(scanner === undefined);
+            scanner = sourceFile.languageVariant === 1 ? jsxScanner : standardScanner;
+            scanner.setText(sourceFile.text);
+            scanner.setTextPos(startPos);
+            var wasNewLine = true;
+            var leadingTrivia;
+            var trailingTrivia;
+            var savedPos;
+            var lastScanAction;
+            var lastTokenInfo;
+            return {
+                advance: advance,
+                readTokenInfo: readTokenInfo,
+                isOnToken: isOnToken,
+                getCurrentLeadingTrivia: function () { return leadingTrivia; },
+                lastTrailingTriviaWasNewLine: function () { return wasNewLine; },
+                close: function () {
+                    ts.Debug.assert(scanner !== undefined);
+                    lastTokenInfo = undefined;
+                    scanner.setText(undefined);
+                    scanner = undefined;
+                }
+            };
+            function advance() {
+                ts.Debug.assert(scanner !== undefined);
+                lastTokenInfo = undefined;
+                var isStarted = scanner.getStartPos() !== startPos;
+                if (isStarted) {
+                    if (trailingTrivia) {
+                        ts.Debug.assert(trailingTrivia.length !== 0);
+                        wasNewLine = ts.lastOrUndefined(trailingTrivia).kind === 4;
+                    }
+                    else {
+                        wasNewLine = false;
+                    }
+                }
+                leadingTrivia = undefined;
+                trailingTrivia = undefined;
+                if (!isStarted) {
+                    scanner.scan();
+                }
+                var pos = scanner.getStartPos();
+                while (pos < endPos) {
+                    var t = scanner.getToken();
+                    if (!ts.isTrivia(t)) {
+                        break;
+                    }
+                    scanner.scan();
+                    var item = {
+                        pos: pos,
+                        end: scanner.getStartPos(),
+                        kind: t
+                    };
+                    pos = scanner.getStartPos();
+                    if (!leadingTrivia) {
+                        leadingTrivia = [];
+                    }
+                    leadingTrivia.push(item);
+                }
+                savedPos = scanner.getStartPos();
+            }
+            function shouldRescanGreaterThanToken(node) {
+                if (node) {
+                    switch (node.kind) {
+                        case 29:
+                        case 64:
+                        case 65:
+                        case 45:
+                        case 44:
+                            return true;
+                    }
+                }
+                return false;
+            }
+            function shouldRescanJsxIdentifier(node) {
+                if (node.parent) {
+                    switch (node.parent.kind) {
+                        case 246:
+                        case 243:
+                        case 245:
+                        case 242:
+                            return node.kind === 69;
+                    }
+                }
+                return false;
+            }
+            function shouldRescanSlashToken(container) {
+                return container.kind === 10;
+            }
+            function shouldRescanTemplateToken(container) {
+                return container.kind === 13 ||
+                    container.kind === 14;
+            }
+            function startsWithSlashToken(t) {
+                return t === 39 || t === 61;
+            }
+            function readTokenInfo(n) {
+                ts.Debug.assert(scanner !== undefined);
+                if (!isOnToken()) {
+                    return {
+                        leadingTrivia: leadingTrivia,
+                        trailingTrivia: undefined,
+                        token: undefined
+                    };
+                }
+                var expectedScanAction = shouldRescanGreaterThanToken(n)
+                    ? 1
+                    : shouldRescanSlashToken(n)
+                        ? 2
+                        : shouldRescanTemplateToken(n)
+                            ? 3
+                            : shouldRescanJsxIdentifier(n)
+                                ? 4
+                                : 0;
+                if (lastTokenInfo && expectedScanAction === lastScanAction) {
+                    return fixTokenKind(lastTokenInfo, n);
+                }
+                if (scanner.getStartPos() !== savedPos) {
+                    ts.Debug.assert(lastTokenInfo !== undefined);
+                    scanner.setTextPos(savedPos);
+                    scanner.scan();
+                }
+                var currentToken = scanner.getToken();
+                if (expectedScanAction === 1 && currentToken === 27) {
+                    currentToken = scanner.reScanGreaterToken();
+                    ts.Debug.assert(n.kind === currentToken);
+                    lastScanAction = 1;
+                }
+                else if (expectedScanAction === 2 && startsWithSlashToken(currentToken)) {
+                    currentToken = scanner.reScanSlashToken();
+                    ts.Debug.assert(n.kind === currentToken);
+                    lastScanAction = 2;
+                }
+                else if (expectedScanAction === 3 && currentToken === 16) {
+                    currentToken = scanner.reScanTemplateToken();
+                    lastScanAction = 3;
+                }
+                else if (expectedScanAction === 4 && currentToken === 69) {
+                    currentToken = scanner.scanJsxIdentifier();
+                    lastScanAction = 4;
+                }
+                else {
+                    lastScanAction = 0;
+                }
+                var token = {
+                    pos: scanner.getStartPos(),
+                    end: scanner.getTextPos(),
+                    kind: currentToken
+                };
+                if (trailingTrivia) {
+                    trailingTrivia = undefined;
+                }
+                while (scanner.getStartPos() < endPos) {
+                    currentToken = scanner.scan();
+                    if (!ts.isTrivia(currentToken)) {
+                        break;
+                    }
+                    var trivia = {
+                        pos: scanner.getStartPos(),
+                        end: scanner.getTextPos(),
+                        kind: currentToken
+                    };
+                    if (!trailingTrivia) {
+                        trailingTrivia = [];
+                    }
+                    trailingTrivia.push(trivia);
+                    if (currentToken === 4) {
+                        scanner.scan();
+                        break;
+                    }
+                }
+                lastTokenInfo = {
+                    leadingTrivia: leadingTrivia,
+                    trailingTrivia: trailingTrivia,
+                    token: token
+                };
+                return fixTokenKind(lastTokenInfo, n);
+            }
+            function isOnToken() {
+                ts.Debug.assert(scanner !== undefined);
+                var current = (lastTokenInfo && lastTokenInfo.token.kind) || scanner.getToken();
+                var startPos = (lastTokenInfo && lastTokenInfo.token.pos) || scanner.getStartPos();
+                return startPos < endPos && current !== 1 && !ts.isTrivia(current);
+            }
+            function fixTokenKind(tokenInfo, container) {
+                if (ts.isToken(container) && tokenInfo.token.kind !== container.kind) {
+                    tokenInfo.token.kind = container.kind;
+                }
+                return tokenInfo;
+            }
+        }
+        formatting.getFormattingScanner = getFormattingScanner;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var FormattingContext = (function () {
+            function FormattingContext(sourceFile, formattingRequestKind) {
+                this.sourceFile = sourceFile;
+                this.formattingRequestKind = formattingRequestKind;
+            }
+            FormattingContext.prototype.updateContext = function (currentRange, currentTokenParent, nextRange, nextTokenParent, commonParent) {
+                ts.Debug.assert(currentRange !== undefined, "currentTokenSpan is null");
+                ts.Debug.assert(currentTokenParent !== undefined, "currentTokenParent is null");
+                ts.Debug.assert(nextRange !== undefined, "nextTokenSpan is null");
+                ts.Debug.assert(nextTokenParent !== undefined, "nextTokenParent is null");
+                ts.Debug.assert(commonParent !== undefined, "commonParent is null");
+                this.currentTokenSpan = currentRange;
+                this.currentTokenParent = currentTokenParent;
+                this.nextTokenSpan = nextRange;
+                this.nextTokenParent = nextTokenParent;
+                this.contextNode = commonParent;
+                this.contextNodeAllOnSameLine = undefined;
+                this.nextNodeAllOnSameLine = undefined;
+                this.tokensAreOnSameLine = undefined;
+                this.contextNodeBlockIsOnOneLine = undefined;
+                this.nextNodeBlockIsOnOneLine = undefined;
+            };
+            FormattingContext.prototype.ContextNodeAllOnSameLine = function () {
+                if (this.contextNodeAllOnSameLine === undefined) {
+                    this.contextNodeAllOnSameLine = this.NodeIsOnOneLine(this.contextNode);
+                }
+                return this.contextNodeAllOnSameLine;
+            };
+            FormattingContext.prototype.NextNodeAllOnSameLine = function () {
+                if (this.nextNodeAllOnSameLine === undefined) {
+                    this.nextNodeAllOnSameLine = this.NodeIsOnOneLine(this.nextTokenParent);
+                }
+                return this.nextNodeAllOnSameLine;
+            };
+            FormattingContext.prototype.TokensAreOnSameLine = function () {
+                if (this.tokensAreOnSameLine === undefined) {
+                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(this.currentTokenSpan.pos).line;
+                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(this.nextTokenSpan.pos).line;
+                    this.tokensAreOnSameLine = (startLine === endLine);
+                }
+                return this.tokensAreOnSameLine;
+            };
+            FormattingContext.prototype.ContextNodeBlockIsOnOneLine = function () {
+                if (this.contextNodeBlockIsOnOneLine === undefined) {
+                    this.contextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.contextNode);
+                }
+                return this.contextNodeBlockIsOnOneLine;
+            };
+            FormattingContext.prototype.NextNodeBlockIsOnOneLine = function () {
+                if (this.nextNodeBlockIsOnOneLine === undefined) {
+                    this.nextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.nextTokenParent);
+                }
+                return this.nextNodeBlockIsOnOneLine;
+            };
+            FormattingContext.prototype.NodeIsOnOneLine = function (node) {
+                var startLine = this.sourceFile.getLineAndCharacterOfPosition(node.getStart(this.sourceFile)).line;
+                var endLine = this.sourceFile.getLineAndCharacterOfPosition(node.getEnd()).line;
+                return startLine === endLine;
+            };
+            FormattingContext.prototype.BlockIsOnOneLine = function (node) {
+                var openBrace = ts.findChildOfKind(node, 15, this.sourceFile);
+                var closeBrace = ts.findChildOfKind(node, 16, this.sourceFile);
+                if (openBrace && closeBrace) {
+                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(openBrace.getEnd()).line;
+                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(closeBrace.getStart(this.sourceFile)).line;
+                    return startLine === endLine;
+                }
+                return false;
+            };
+            return FormattingContext;
+        }());
+        formatting.FormattingContext = FormattingContext;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Rule = (function () {
+            function Rule(Descriptor, Operation, Flag) {
+                if (Flag === void 0) { Flag = 0; }
+                this.Descriptor = Descriptor;
+                this.Operation = Operation;
+                this.Flag = Flag;
+            }
+            Rule.prototype.toString = function () {
+                return "[desc=" + this.Descriptor + "," +
+                    "operation=" + this.Operation + "," +
+                    "flag=" + this.Flag + "]";
+            };
+            return Rule;
+        }());
+        formatting.Rule = Rule;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleDescriptor = (function () {
+            function RuleDescriptor(LeftTokenRange, RightTokenRange) {
+                this.LeftTokenRange = LeftTokenRange;
+                this.RightTokenRange = RightTokenRange;
+            }
+            RuleDescriptor.prototype.toString = function () {
+                return "[leftRange=" + this.LeftTokenRange + "," +
+                    "rightRange=" + this.RightTokenRange + "]";
+            };
+            RuleDescriptor.create1 = function (left, right) {
+                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), formatting.Shared.TokenRange.FromToken(right));
+            };
+            RuleDescriptor.create2 = function (left, right) {
+                return RuleDescriptor.create4(left, formatting.Shared.TokenRange.FromToken(right));
+            };
+            RuleDescriptor.create3 = function (left, right) {
+                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), right);
+            };
+            RuleDescriptor.create4 = function (left, right) {
+                return new RuleDescriptor(left, right);
+            };
+            return RuleDescriptor;
+        }());
+        formatting.RuleDescriptor = RuleDescriptor;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleOperation = (function () {
+            function RuleOperation(Context, Action) {
+                this.Context = Context;
+                this.Action = Action;
+            }
+            RuleOperation.prototype.toString = function () {
+                return "[context=" + this.Context + "," +
+                    "action=" + this.Action + "]";
+            };
+            RuleOperation.create1 = function (action) {
+                return RuleOperation.create2(formatting.RuleOperationContext.Any, action);
+            };
+            RuleOperation.create2 = function (context, action) {
+                return new RuleOperation(context, action);
+            };
+            return RuleOperation;
+        }());
+        formatting.RuleOperation = RuleOperation;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleOperationContext = (function () {
+            function RuleOperationContext() {
+                var funcs = [];
+                for (var _i = 0; _i < arguments.length; _i++) {
+                    funcs[_i - 0] = arguments[_i];
+                }
+                this.customContextChecks = funcs;
+            }
+            RuleOperationContext.prototype.IsAny = function () {
+                return this === RuleOperationContext.Any;
+            };
+            RuleOperationContext.prototype.InContext = function (context) {
+                if (this.IsAny()) {
+                    return true;
+                }
+                for (var _i = 0, _a = this.customContextChecks; _i < _a.length; _i++) {
+                    var check = _a[_i];
+                    if (!check(context)) {
+                        return false;
+                    }
+                }
+                return true;
+            };
+            RuleOperationContext.Any = new RuleOperationContext();
+            return RuleOperationContext;
+        }());
+        formatting.RuleOperationContext = RuleOperationContext;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Rules = (function () {
+            function Rules() {
+                this.IgnoreBeforeComment = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.Comments), formatting.RuleOperation.create1(1));
+                this.IgnoreAfterLineComment = new formatting.Rule(formatting.RuleDescriptor.create3(2, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create1(1));
+                this.NoSpaceBeforeSemicolon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 23), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeColon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 54), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
+                this.NoSpaceBeforeQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 53), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
+                this.SpaceAfterColon = new formatting.Rule(formatting.RuleDescriptor.create3(54, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 2));
+                this.SpaceAfterQuestionMarkInConditionalOperator = new formatting.Rule(formatting.RuleDescriptor.create3(53, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConditionalOperatorContext), 2));
+                this.NoSpaceAfterQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create3(53, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterSemicolon = new formatting.Rule(formatting.RuleDescriptor.create3(23, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), 2));
+                this.SpaceBetweenCloseBraceAndElse = new formatting.Rule(formatting.RuleDescriptor.create1(16, 80), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceBetweenCloseBraceAndWhile = new formatting.Rule(formatting.RuleDescriptor.create1(16, 104), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16, formatting.Shared.TokenRange.FromTokens([18, 20, 24, 23])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeDot = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 21), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterDot = new formatting.Rule(formatting.RuleDescriptor.create3(21, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create3(20, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), 8));
+                this.FunctionOpenBraceLeftTokenRange = formatting.Shared.TokenRange.AnyIncludingMultilineComments;
+                this.SpaceBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2), 1);
+                this.TypeScriptOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([69, 3, 73]);
+                this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2), 1);
+                this.ControlOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([18, 3, 79, 100, 85, 80]);
+                this.SpaceBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2), 1);
+                this.SpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(15, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2));
+                this.SpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2));
+                this.NoSpaceBetweenEmptyBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), 8));
+                this.NewLineAfterOpenBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create3(15, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4));
+                this.NewLineBeforeCloseBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyIncludingMultilineComments, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4));
+                this.NoSpaceAfterUnaryPrefixOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.UnaryPrefixOperators, formatting.Shared.TokenRange.UnaryPrefixExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
+                this.NoSpaceAfterUnaryPreincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(41, formatting.Shared.TokenRange.UnaryPreincrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterUnaryPredecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(42, formatting.Shared.TokenRange.UnaryPredecrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeUnaryPostincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostincrementExpressions, 41), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeUnaryPostdecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostdecrementExpressions, 42), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterPostincrementWhenFollowedByAdd = new formatting.Rule(formatting.RuleDescriptor.create1(41, 35), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterAddWhenFollowedByUnaryPlus = new formatting.Rule(formatting.RuleDescriptor.create1(35, 35), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterAddWhenFollowedByPreincrement = new formatting.Rule(formatting.RuleDescriptor.create1(35, 41), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterPostdecrementWhenFollowedBySubtract = new formatting.Rule(formatting.RuleDescriptor.create1(42, 36), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterSubtractWhenFollowedByUnaryMinus = new formatting.Rule(formatting.RuleDescriptor.create1(36, 36), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterSubtractWhenFollowedByPredecrement = new formatting.Rule(formatting.RuleDescriptor.create1(36, 42), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.NoSpaceBeforeComma = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 24), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterCertainKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([102, 98, 92, 78, 94, 101, 119]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceAfterLetConstInVariableDeclaration = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([108, 74]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), 2));
+                this.NoSpaceBeforeOpenParenInFuncCall = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), 8));
+                this.SpaceAfterFunctionInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create3(87, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2));
+                this.NoSpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 8));
+                this.SpaceAfterVoidOperator = new formatting.Rule(formatting.RuleDescriptor.create3(103, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), 2));
+                this.NoSpaceBetweenReturnAndSemicolon = new formatting.Rule(formatting.RuleDescriptor.create1(94, 23), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceBetweenStatements = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([18, 79, 80, 71]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotForContext), 2));
+                this.SpaceAfterTryFinally = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([100, 85]), 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceAfterGetSetInMember = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([123, 131]), 69), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2));
+                this.SpaceBeforeBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryKeywordOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryKeywordOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.NoSpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(121, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterModuleImport = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([125, 129]), 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([115, 73, 122, 77, 81, 82, 83, 123, 106, 89, 107, 125, 126, 110, 112, 111, 131, 113, 134]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceBeforeCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([83, 106])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceAfterModuleName = new formatting.Rule(formatting.RuleDescriptor.create1(9, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsModuleDeclContext), 2));
+                this.SpaceBeforeArrow = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 34), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceAfterArrow = new formatting.Rule(formatting.RuleDescriptor.create3(34, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceAfterEllipsis = new formatting.Rule(formatting.RuleDescriptor.create1(22, 69), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterOptionalParameters = new formatting.Rule(formatting.RuleDescriptor.create3(53, formatting.Shared.TokenRange.FromTokens([18, 24])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8));
+                this.NoSpaceBeforeOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.TypeNames, 25), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
+                this.NoSpaceBetweenCloseParenAndAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create1(18, 25), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
+                this.NoSpaceAfterOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(25, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
+                this.NoSpaceBeforeCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 27), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
+                this.NoSpaceAfterCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(27, formatting.Shared.TokenRange.FromTokens([17, 19, 27, 24])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8));
+                this.NoSpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(27, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 8));
+                this.NoSpaceBetweenEmptyInterfaceBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15, 16), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectTypeContext), 8));
+                this.SpaceBeforeAt = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 55), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceAfterAt = new formatting.Rule(formatting.RuleDescriptor.create3(55, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterDecorator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([115, 69, 82, 77, 73, 113, 112, 110, 111, 123, 131, 19, 37])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsEndOfDecoratorContextOnSameLine), 2));
+                this.NoSpaceBetweenFunctionKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(87, 37), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 8));
+                this.SpaceAfterStarInGeneratorDeclaration = new formatting.Rule(formatting.RuleDescriptor.create3(37, formatting.Shared.TokenRange.FromTokens([69, 17])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 2));
+                this.NoSpaceBetweenYieldKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(114, 37), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 8));
+                this.SpaceBetweenYieldOrYieldStarAndOperand = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([114, 37]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 2));
+                this.SpaceBetweenAsyncAndOpenParen = new formatting.Rule(formatting.RuleDescriptor.create1(118, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsArrowFunctionContext, Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceBetweenAsyncAndFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(118, 87), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceBetweenTagAndTemplateString = new formatting.Rule(formatting.RuleDescriptor.create3(69, formatting.Shared.TokenRange.FromTokens([11, 12])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.HighPriorityCommonRules = [
+                    this.IgnoreBeforeComment, this.IgnoreAfterLineComment,
+                    this.NoSpaceBeforeColon, this.SpaceAfterColon, this.NoSpaceBeforeQuestionMark, this.SpaceAfterQuestionMarkInConditionalOperator,
+                    this.NoSpaceAfterQuestionMark,
+                    this.NoSpaceBeforeDot, this.NoSpaceAfterDot,
+                    this.NoSpaceAfterUnaryPrefixOperator,
+                    this.NoSpaceAfterUnaryPreincrementOperator, this.NoSpaceAfterUnaryPredecrementOperator,
+                    this.NoSpaceBeforeUnaryPostincrementOperator, this.NoSpaceBeforeUnaryPostdecrementOperator,
+                    this.SpaceAfterPostincrementWhenFollowedByAdd,
+                    this.SpaceAfterAddWhenFollowedByUnaryPlus, this.SpaceAfterAddWhenFollowedByPreincrement,
+                    this.SpaceAfterPostdecrementWhenFollowedBySubtract,
+                    this.SpaceAfterSubtractWhenFollowedByUnaryMinus, this.SpaceAfterSubtractWhenFollowedByPredecrement,
+                    this.NoSpaceAfterCloseBrace,
+                    this.SpaceAfterOpenBrace, this.SpaceBeforeCloseBrace, this.NewLineBeforeCloseBraceInBlockContext,
+                    this.SpaceAfterCloseBrace, this.SpaceBetweenCloseBraceAndElse, this.SpaceBetweenCloseBraceAndWhile, this.NoSpaceBetweenEmptyBraceBrackets,
+                    this.NoSpaceBetweenFunctionKeywordAndStar, this.SpaceAfterStarInGeneratorDeclaration,
+                    this.SpaceAfterFunctionInFuncDecl, this.NewLineAfterOpenBraceInBlockContext, this.SpaceAfterGetSetInMember,
+                    this.NoSpaceBetweenYieldKeywordAndStar, this.SpaceBetweenYieldOrYieldStarAndOperand,
+                    this.NoSpaceBetweenReturnAndSemicolon,
+                    this.SpaceAfterCertainKeywords,
+                    this.SpaceAfterLetConstInVariableDeclaration,
+                    this.NoSpaceBeforeOpenParenInFuncCall,
+                    this.SpaceBeforeBinaryKeywordOperator, this.SpaceAfterBinaryKeywordOperator,
+                    this.SpaceAfterVoidOperator,
+                    this.SpaceBetweenAsyncAndOpenParen, this.SpaceBetweenAsyncAndFunctionKeyword,
+                    this.NoSpaceBetweenTagAndTemplateString,
+                    this.NoSpaceAfterConstructor, this.NoSpaceAfterModuleImport,
+                    this.SpaceAfterCertainTypeScriptKeywords, this.SpaceBeforeCertainTypeScriptKeywords,
+                    this.SpaceAfterModuleName,
+                    this.SpaceBeforeArrow, this.SpaceAfterArrow,
+                    this.NoSpaceAfterEllipsis,
+                    this.NoSpaceAfterOptionalParameters,
+                    this.NoSpaceBetweenEmptyInterfaceBraceBrackets,
+                    this.NoSpaceBeforeOpenAngularBracket,
+                    this.NoSpaceBetweenCloseParenAndAngularBracket,
+                    this.NoSpaceAfterOpenAngularBracket,
+                    this.NoSpaceBeforeCloseAngularBracket,
+                    this.NoSpaceAfterCloseAngularBracket,
+                    this.NoSpaceAfterTypeAssertion,
+                    this.SpaceBeforeAt,
+                    this.NoSpaceAfterAt,
+                    this.SpaceAfterDecorator,
+                ];
+                this.LowPriorityCommonRules = [
+                    this.NoSpaceBeforeSemicolon,
+                    this.SpaceBeforeOpenBraceInControl, this.SpaceBeforeOpenBraceInFunction, this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock,
+                    this.NoSpaceBeforeComma,
+                    this.NoSpaceBeforeOpenBracket,
+                    this.NoSpaceAfterCloseBracket,
+                    this.SpaceAfterSemicolon,
+                    this.NoSpaceBeforeOpenParenInFuncDecl,
+                    this.SpaceBetweenStatements, this.SpaceAfterTryFinally
+                ];
+                this.SpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNextTokenNotCloseBracket), 2));
+                this.NoSpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.SpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2));
+                this.NoSpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8));
+                this.NoSpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8));
+                this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 2));
+                this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 8));
+                this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4), 1);
+                this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4), 1);
+                this.NewLineBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), 4), 1);
+                this.SpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 2));
+                this.NoSpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 8));
+                this.SpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceBetweenParens = new formatting.Rule(formatting.RuleDescriptor.create1(17, 18), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceBetweenBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(19, 20), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.NoSpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12, 13]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12, 13]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.NoSpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13, 14])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8));
+                this.SpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13, 14])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2));
+                this.SpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2));
+                this.NoSpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87, 17), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 8));
+            }
+            Rules.prototype.getRuleName = function (rule) {
+                var o = this;
+                for (var name_39 in o) {
+                    if (o[name_39] === rule) {
+                        return name_39;
+                    }
+                }
+                throw new Error("Unknown rule");
+            };
+            Rules.IsForContext = function (context) {
+                return context.contextNode.kind === 206;
+            };
+            Rules.IsNotForContext = function (context) {
+                return !Rules.IsForContext(context);
+            };
+            Rules.IsBinaryOpContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 187:
+                    case 188:
+                    case 195:
+                    case 154:
+                    case 162:
+                    case 163:
+                        return true;
+                    case 169:
+                    case 223:
+                    case 229:
+                    case 218:
+                    case 142:
+                    case 255:
+                    case 145:
+                    case 144:
+                        return context.currentTokenSpan.kind === 56 || context.nextTokenSpan.kind === 56;
+                    case 207:
+                        return context.currentTokenSpan.kind === 90 || context.nextTokenSpan.kind === 90;
+                    case 208:
+                        return context.currentTokenSpan.kind === 138 || context.nextTokenSpan.kind === 138;
+                }
+                return false;
+            };
+            Rules.IsNotBinaryOpContext = function (context) {
+                return !Rules.IsBinaryOpContext(context);
+            };
+            Rules.IsConditionalOperatorContext = function (context) {
+                return context.contextNode.kind === 188;
+            };
+            Rules.IsSameLineTokenOrBeforeMultilineBlockContext = function (context) {
+                return context.TokensAreOnSameLine() || Rules.IsBeforeMultilineBlockContext(context);
+            };
+            Rules.IsBeforeMultilineBlockContext = function (context) {
+                return Rules.IsBeforeBlockContext(context) && !(context.NextNodeAllOnSameLine() || context.NextNodeBlockIsOnOneLine());
+            };
+            Rules.IsMultilineBlockContext = function (context) {
+                return Rules.IsBlockContext(context) && !(context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
+            };
+            Rules.IsSingleLineBlockContext = function (context) {
+                return Rules.IsBlockContext(context) && (context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
+            };
+            Rules.IsBlockContext = function (context) {
+                return Rules.NodeIsBlockContext(context.contextNode);
+            };
+            Rules.IsBeforeBlockContext = function (context) {
+                return Rules.NodeIsBlockContext(context.nextTokenParent);
+            };
+            Rules.NodeIsBlockContext = function (node) {
+                if (Rules.NodeIsTypeScriptDeclWithBlockContext(node)) {
+                    return true;
+                }
+                switch (node.kind) {
+                    case 199:
+                    case 227:
+                    case 171:
+                    case 226:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsFunctionDeclContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 220:
+                    case 147:
+                    case 146:
+                    case 149:
+                    case 150:
+                    case 151:
+                    case 179:
+                    case 148:
+                    case 180:
+                    case 222:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsFunctionDeclarationOrFunctionExpressionContext = function (context) {
+                return context.contextNode.kind === 220 || context.contextNode.kind === 179;
+            };
+            Rules.IsTypeScriptDeclWithBlockContext = function (context) {
+                return Rules.NodeIsTypeScriptDeclWithBlockContext(context.contextNode);
+            };
+            Rules.NodeIsTypeScriptDeclWithBlockContext = function (node) {
+                switch (node.kind) {
+                    case 221:
+                    case 192:
+                    case 222:
+                    case 224:
+                    case 159:
+                    case 225:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsAfterCodeBlockContext = function (context) {
+                switch (context.currentTokenParent.kind) {
+                    case 221:
+                    case 225:
+                    case 224:
+                    case 199:
+                    case 252:
+                    case 226:
+                    case 213:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsControlDeclContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 203:
+                    case 213:
+                    case 206:
+                    case 207:
+                    case 208:
+                    case 205:
+                    case 216:
+                    case 204:
+                    case 212:
+                    case 252:
+                        return true;
+                    default:
+                        return false;
+                }
+            };
+            Rules.IsObjectContext = function (context) {
+                return context.contextNode.kind === 171;
+            };
+            Rules.IsFunctionCallContext = function (context) {
+                return context.contextNode.kind === 174;
+            };
+            Rules.IsNewContext = function (context) {
+                return context.contextNode.kind === 175;
+            };
+            Rules.IsFunctionCallOrNewContext = function (context) {
+                return Rules.IsFunctionCallContext(context) || Rules.IsNewContext(context);
+            };
+            Rules.IsPreviousTokenNotComma = function (context) {
+                return context.currentTokenSpan.kind !== 24;
+            };
+            Rules.IsNextTokenNotCloseBracket = function (context) {
+                return context.nextTokenSpan.kind !== 20;
+            };
+            Rules.IsArrowFunctionContext = function (context) {
+                return context.contextNode.kind === 180;
+            };
+            Rules.IsNonJsxSameLineTokenContext = function (context) {
+                return context.TokensAreOnSameLine() && context.contextNode.kind !== 244;
+            };
+            Rules.IsNotBeforeBlockInFunctionDeclarationContext = function (context) {
+                return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context);
+            };
+            Rules.IsEndOfDecoratorContextOnSameLine = function (context) {
+                return context.TokensAreOnSameLine() &&
+                    context.contextNode.decorators &&
+                    Rules.NodeIsInDecoratorContext(context.currentTokenParent) &&
+                    !Rules.NodeIsInDecoratorContext(context.nextTokenParent);
+            };
+            Rules.NodeIsInDecoratorContext = function (node) {
+                while (ts.isExpression(node)) {
+                    node = node.parent;
+                }
+                return node.kind === 143;
+            };
+            Rules.IsStartOfVariableDeclarationList = function (context) {
+                return context.currentTokenParent.kind === 219 &&
+                    context.currentTokenParent.getStart(context.sourceFile) === context.currentTokenSpan.pos;
+            };
+            Rules.IsNotFormatOnEnter = function (context) {
+                return context.formattingRequestKind !== 2;
+            };
+            Rules.IsModuleDeclContext = function (context) {
+                return context.contextNode.kind === 225;
+            };
+            Rules.IsObjectTypeContext = function (context) {
+                return context.contextNode.kind === 159;
+            };
+            Rules.IsTypeArgumentOrParameterOrAssertion = function (token, parent) {
+                if (token.kind !== 25 && token.kind !== 27) {
+                    return false;
+                }
+                switch (parent.kind) {
+                    case 155:
+                    case 177:
+                    case 221:
+                    case 192:
+                    case 222:
+                    case 220:
+                    case 179:
+                    case 180:
+                    case 147:
+                    case 146:
+                    case 151:
+                    case 152:
+                    case 174:
+                    case 175:
+                    case 194:
+                        return true;
+                    default:
+                        return false;
+                }
+            };
+            Rules.IsTypeArgumentOrParameterOrAssertionContext = function (context) {
+                return Rules.IsTypeArgumentOrParameterOrAssertion(context.currentTokenSpan, context.currentTokenParent) ||
+                    Rules.IsTypeArgumentOrParameterOrAssertion(context.nextTokenSpan, context.nextTokenParent);
+            };
+            Rules.IsTypeAssertionContext = function (context) {
+                return context.contextNode.kind === 177;
+            };
+            Rules.IsVoidOpContext = function (context) {
+                return context.currentTokenSpan.kind === 103 && context.currentTokenParent.kind === 183;
+            };
+            Rules.IsYieldOrYieldStarWithOperand = function (context) {
+                return context.contextNode.kind === 190 && context.contextNode.expression !== undefined;
+            };
+            return Rules;
+        }());
+        formatting.Rules = Rules;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RulesMap = (function () {
+            function RulesMap() {
+                this.map = [];
+                this.mapRowLength = 0;
+            }
+            RulesMap.create = function (rules) {
+                var result = new RulesMap();
+                result.Initialize(rules);
+                return result;
+            };
+            RulesMap.prototype.Initialize = function (rules) {
+                this.mapRowLength = 138 + 1;
+                this.map = new Array(this.mapRowLength * this.mapRowLength);
+                var rulesBucketConstructionStateList = new Array(this.map.length);
+                this.FillRules(rules, rulesBucketConstructionStateList);
+                return this.map;
+            };
+            RulesMap.prototype.FillRules = function (rules, rulesBucketConstructionStateList) {
+                var _this = this;
+                rules.forEach(function (rule) {
+                    _this.FillRule(rule, rulesBucketConstructionStateList);
+                });
+            };
+            RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
+                var rulesBucketIndex = (row * this.mapRowLength) + column;
+                return rulesBucketIndex;
+            };
+            RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
+                var _this = this;
+                var specificRule = rule.Descriptor.LeftTokenRange !== formatting.Shared.TokenRange.Any &&
+                    rule.Descriptor.RightTokenRange !== formatting.Shared.TokenRange.Any;
+                rule.Descriptor.LeftTokenRange.GetTokens().forEach(function (left) {
+                    rule.Descriptor.RightTokenRange.GetTokens().forEach(function (right) {
+                        var rulesBucketIndex = _this.GetRuleBucketIndex(left, right);
+                        var rulesBucket = _this.map[rulesBucketIndex];
+                        if (rulesBucket === undefined) {
+                            rulesBucket = _this.map[rulesBucketIndex] = new RulesBucket();
+                        }
+                        rulesBucket.AddRule(rule, specificRule, rulesBucketConstructionStateList, rulesBucketIndex);
+                    });
+                });
+            };
+            RulesMap.prototype.GetRule = function (context) {
+                var bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
+                var bucket = this.map[bucketIndex];
+                if (bucket) {
+                    for (var _i = 0, _a = bucket.Rules(); _i < _a.length; _i++) {
+                        var rule = _a[_i];
+                        if (rule.Operation.Context.InContext(context)) {
+                            return rule;
+                        }
+                    }
+                }
+                return undefined;
+            };
+            return RulesMap;
+        }());
+        formatting.RulesMap = RulesMap;
+        var MaskBitSize = 5;
+        var Mask = 0x1f;
+        (function (RulesPosition) {
+            RulesPosition[RulesPosition["IgnoreRulesSpecific"] = 0] = "IgnoreRulesSpecific";
+            RulesPosition[RulesPosition["IgnoreRulesAny"] = MaskBitSize * 1] = "IgnoreRulesAny";
+            RulesPosition[RulesPosition["ContextRulesSpecific"] = MaskBitSize * 2] = "ContextRulesSpecific";
+            RulesPosition[RulesPosition["ContextRulesAny"] = MaskBitSize * 3] = "ContextRulesAny";
+            RulesPosition[RulesPosition["NoContextRulesSpecific"] = MaskBitSize * 4] = "NoContextRulesSpecific";
+            RulesPosition[RulesPosition["NoContextRulesAny"] = MaskBitSize * 5] = "NoContextRulesAny";
+        })(formatting.RulesPosition || (formatting.RulesPosition = {}));
+        var RulesPosition = formatting.RulesPosition;
+        var RulesBucketConstructionState = (function () {
+            function RulesBucketConstructionState() {
+                this.rulesInsertionIndexBitmap = 0;
+            }
+            RulesBucketConstructionState.prototype.GetInsertionIndex = function (maskPosition) {
+                var index = 0;
+                var pos = 0;
+                var indexBitmap = this.rulesInsertionIndexBitmap;
+                while (pos <= maskPosition) {
+                    index += (indexBitmap & Mask);
+                    indexBitmap >>= MaskBitSize;
+                    pos += MaskBitSize;
+                }
+                return index;
+            };
+            RulesBucketConstructionState.prototype.IncreaseInsertionIndex = function (maskPosition) {
+                var value = (this.rulesInsertionIndexBitmap >> maskPosition) & Mask;
+                value++;
+                ts.Debug.assert((value & Mask) === value, "Adding more rules into the sub-bucket than allowed. Maximum allowed is 32 rules.");
+                var temp = this.rulesInsertionIndexBitmap & ~(Mask << maskPosition);
+                temp |= value << maskPosition;
+                this.rulesInsertionIndexBitmap = temp;
+            };
+            return RulesBucketConstructionState;
+        }());
+        formatting.RulesBucketConstructionState = RulesBucketConstructionState;
+        var RulesBucket = (function () {
+            function RulesBucket() {
+                this.rules = [];
+            }
+            RulesBucket.prototype.Rules = function () {
+                return this.rules;
+            };
+            RulesBucket.prototype.AddRule = function (rule, specificTokens, constructionState, rulesBucketIndex) {
+                var position;
+                if (rule.Operation.Action === 1) {
+                    position = specificTokens ?
+                        RulesPosition.IgnoreRulesSpecific :
+                        RulesPosition.IgnoreRulesAny;
+                }
+                else if (!rule.Operation.Context.IsAny()) {
+                    position = specificTokens ?
+                        RulesPosition.ContextRulesSpecific :
+                        RulesPosition.ContextRulesAny;
+                }
+                else {
+                    position = specificTokens ?
+                        RulesPosition.NoContextRulesSpecific :
+                        RulesPosition.NoContextRulesAny;
+                }
+                var state = constructionState[rulesBucketIndex];
+                if (state === undefined) {
+                    state = constructionState[rulesBucketIndex] = new RulesBucketConstructionState();
+                }
+                var index = state.GetInsertionIndex(position);
+                this.rules.splice(index, 0, rule);
+                state.IncreaseInsertionIndex(position);
+            };
+            return RulesBucket;
+        }());
+        formatting.RulesBucket = RulesBucket;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Shared;
+        (function (Shared) {
+            var TokenRangeAccess = (function () {
+                function TokenRangeAccess(from, to, except) {
+                    this.tokens = [];
+                    for (var token = from; token <= to; token++) {
+                        if (ts.indexOf(except, token) < 0) {
+                            this.tokens.push(token);
+                        }
+                    }
+                }
+                TokenRangeAccess.prototype.GetTokens = function () {
+                    return this.tokens;
+                };
+                TokenRangeAccess.prototype.Contains = function (token) {
+                    return this.tokens.indexOf(token) >= 0;
+                };
+                return TokenRangeAccess;
+            }());
+            Shared.TokenRangeAccess = TokenRangeAccess;
+            var TokenValuesAccess = (function () {
+                function TokenValuesAccess(tks) {
+                    this.tokens = tks && tks.length ? tks : [];
+                }
+                TokenValuesAccess.prototype.GetTokens = function () {
+                    return this.tokens;
+                };
+                TokenValuesAccess.prototype.Contains = function (token) {
+                    return this.tokens.indexOf(token) >= 0;
+                };
+                return TokenValuesAccess;
+            }());
+            Shared.TokenValuesAccess = TokenValuesAccess;
+            var TokenSingleValueAccess = (function () {
+                function TokenSingleValueAccess(token) {
+                    this.token = token;
+                }
+                TokenSingleValueAccess.prototype.GetTokens = function () {
+                    return [this.token];
+                };
+                TokenSingleValueAccess.prototype.Contains = function (tokenValue) {
+                    return tokenValue === this.token;
+                };
+                return TokenSingleValueAccess;
+            }());
+            Shared.TokenSingleValueAccess = TokenSingleValueAccess;
+            var TokenAllAccess = (function () {
+                function TokenAllAccess() {
+                }
+                TokenAllAccess.prototype.GetTokens = function () {
+                    var result = [];
+                    for (var token = 0; token <= 138; token++) {
+                        result.push(token);
+                    }
+                    return result;
+                };
+                TokenAllAccess.prototype.Contains = function (tokenValue) {
+                    return true;
+                };
+                TokenAllAccess.prototype.toString = function () {
+                    return "[allTokens]";
+                };
+                return TokenAllAccess;
+            }());
+            Shared.TokenAllAccess = TokenAllAccess;
+            var TokenRange = (function () {
+                function TokenRange(tokenAccess) {
+                    this.tokenAccess = tokenAccess;
+                }
+                TokenRange.FromToken = function (token) {
+                    return new TokenRange(new TokenSingleValueAccess(token));
+                };
+                TokenRange.FromTokens = function (tokens) {
+                    return new TokenRange(new TokenValuesAccess(tokens));
+                };
+                TokenRange.FromRange = function (f, to, except) {
+                    if (except === void 0) { except = []; }
+                    return new TokenRange(new TokenRangeAccess(f, to, except));
+                };
+                TokenRange.AllTokens = function () {
+                    return new TokenRange(new TokenAllAccess());
+                };
+                TokenRange.prototype.GetTokens = function () {
+                    return this.tokenAccess.GetTokens();
+                };
+                TokenRange.prototype.Contains = function (token) {
+                    return this.tokenAccess.Contains(token);
+                };
+                TokenRange.prototype.toString = function () {
+                    return this.tokenAccess.toString();
+                };
+                TokenRange.Any = TokenRange.AllTokens();
+                TokenRange.AnyIncludingMultilineComments = TokenRange.FromTokens(TokenRange.Any.GetTokens().concat([3]));
+                TokenRange.Keywords = TokenRange.FromRange(70, 138);
+                TokenRange.BinaryOperators = TokenRange.FromRange(25, 68);
+                TokenRange.BinaryKeywordOperators = TokenRange.FromTokens([90, 91, 138, 116, 124]);
+                TokenRange.UnaryPrefixOperators = TokenRange.FromTokens([41, 42, 50, 49]);
+                TokenRange.UnaryPrefixExpressions = TokenRange.FromTokens([8, 69, 17, 19, 15, 97, 92]);
+                TokenRange.UnaryPreincrementExpressions = TokenRange.FromTokens([69, 17, 97, 92]);
+                TokenRange.UnaryPostincrementExpressions = TokenRange.FromTokens([69, 18, 20, 92]);
+                TokenRange.UnaryPredecrementExpressions = TokenRange.FromTokens([69, 17, 97, 92]);
+                TokenRange.UnaryPostdecrementExpressions = TokenRange.FromTokens([69, 18, 20, 92]);
+                TokenRange.Comments = TokenRange.FromTokens([2, 3]);
+                TokenRange.TypeNames = TokenRange.FromTokens([69, 130, 132, 120, 133, 103, 117]);
+                return TokenRange;
+            }());
+            Shared.TokenRange = TokenRange;
+        })(Shared = formatting.Shared || (formatting.Shared = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RulesProvider = (function () {
+            function RulesProvider() {
+                this.globalRules = new formatting.Rules();
+            }
+            RulesProvider.prototype.getRuleName = function (rule) {
+                return this.globalRules.getRuleName(rule);
+            };
+            RulesProvider.prototype.getRuleByName = function (name) {
+                return this.globalRules[name];
+            };
+            RulesProvider.prototype.getRulesMap = function () {
+                return this.rulesMap;
+            };
+            RulesProvider.prototype.ensureUpToDate = function (options) {
+                if (!this.options || !ts.compareDataObjects(this.options, options)) {
+                    var activeRules = this.createActiveRules(options);
+                    var rulesMap = formatting.RulesMap.create(activeRules);
+                    this.activeRules = activeRules;
+                    this.rulesMap = rulesMap;
+                    this.options = ts.clone(options);
+                }
+            };
+            RulesProvider.prototype.createActiveRules = function (options) {
+                var rules = this.globalRules.HighPriorityCommonRules.slice(0);
+                if (options.InsertSpaceAfterCommaDelimiter) {
+                    rules.push(this.globalRules.SpaceAfterComma);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterComma);
+                }
+                if (options.InsertSpaceAfterFunctionKeywordForAnonymousFunctions) {
+                    rules.push(this.globalRules.SpaceAfterAnonymousFunctionKeyword);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterAnonymousFunctionKeyword);
+                }
+                if (options.InsertSpaceAfterKeywordsInControlFlowStatements) {
+                    rules.push(this.globalRules.SpaceAfterKeywordInControl);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterKeywordInControl);
+                }
+                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis) {
+                    rules.push(this.globalRules.SpaceAfterOpenParen);
+                    rules.push(this.globalRules.SpaceBeforeCloseParen);
+                    rules.push(this.globalRules.NoSpaceBetweenParens);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterOpenParen);
+                    rules.push(this.globalRules.NoSpaceBeforeCloseParen);
+                    rules.push(this.globalRules.NoSpaceBetweenParens);
+                }
+                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets) {
+                    rules.push(this.globalRules.SpaceAfterOpenBracket);
+                    rules.push(this.globalRules.SpaceBeforeCloseBracket);
+                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterOpenBracket);
+                    rules.push(this.globalRules.NoSpaceBeforeCloseBracket);
+                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
+                }
+                if (options.InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces) {
+                    rules.push(this.globalRules.SpaceAfterTemplateHeadAndMiddle);
+                    rules.push(this.globalRules.SpaceBeforeTemplateMiddleAndTail);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterTemplateHeadAndMiddle);
+                    rules.push(this.globalRules.NoSpaceBeforeTemplateMiddleAndTail);
+                }
+                if (options.InsertSpaceAfterSemicolonInForStatements) {
+                    rules.push(this.globalRules.SpaceAfterSemicolonInFor);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterSemicolonInFor);
+                }
+                if (options.InsertSpaceBeforeAndAfterBinaryOperators) {
+                    rules.push(this.globalRules.SpaceBeforeBinaryOperator);
+                    rules.push(this.globalRules.SpaceAfterBinaryOperator);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceBeforeBinaryOperator);
+                    rules.push(this.globalRules.NoSpaceAfterBinaryOperator);
+                }
+                if (options.PlaceOpenBraceOnNewLineForControlBlocks) {
+                    rules.push(this.globalRules.NewLineBeforeOpenBraceInControl);
+                }
+                if (options.PlaceOpenBraceOnNewLineForFunctions) {
+                    rules.push(this.globalRules.NewLineBeforeOpenBraceInFunction);
+                    rules.push(this.globalRules.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock);
+                }
+                rules = rules.concat(this.globalRules.LowPriorityCommonRules);
+                return rules;
+            };
+            return RulesProvider;
+        }());
+        formatting.RulesProvider = RulesProvider;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        function formatOnEnter(position, sourceFile, rulesProvider, options) {
+            var line = sourceFile.getLineAndCharacterOfPosition(position).line;
+            if (line === 0) {
+                return [];
+            }
+            var endOfFormatSpan = ts.getEndLinePosition(line, sourceFile);
+            while (ts.isWhiteSpace(sourceFile.text.charCodeAt(endOfFormatSpan)) && !ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+                endOfFormatSpan--;
+            }
+            if (ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+                endOfFormatSpan--;
+            }
+            var span = {
+                pos: ts.getStartPositionOfLine(line - 1, sourceFile),
+                end: endOfFormatSpan + 1
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 2);
+        }
+        formatting.formatOnEnter = formatOnEnter;
+        function formatOnSemicolon(position, sourceFile, rulesProvider, options) {
+            return formatOutermostParent(position, 23, sourceFile, options, rulesProvider, 3);
+        }
+        formatting.formatOnSemicolon = formatOnSemicolon;
+        function formatOnClosingCurly(position, sourceFile, rulesProvider, options) {
+            return formatOutermostParent(position, 16, sourceFile, options, rulesProvider, 4);
+        }
+        formatting.formatOnClosingCurly = formatOnClosingCurly;
+        function formatDocument(sourceFile, rulesProvider, options) {
+            var span = {
+                pos: 0,
+                end: sourceFile.text.length
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 0);
+        }
+        formatting.formatDocument = formatDocument;
+        function formatSelection(start, end, sourceFile, rulesProvider, options) {
+            var span = {
+                pos: ts.getLineStartPositionForPosition(start, sourceFile),
+                end: end
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 1);
+        }
+        formatting.formatSelection = formatSelection;
+        function formatOutermostParent(position, expectedLastToken, sourceFile, options, rulesProvider, requestKind) {
+            var parent = findOutermostParent(position, expectedLastToken, sourceFile);
+            if (!parent) {
+                return [];
+            }
+            var span = {
+                pos: ts.getLineStartPositionForPosition(parent.getStart(sourceFile), sourceFile),
+                end: parent.end
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, requestKind);
+        }
+        function findOutermostParent(position, expectedTokenKind, sourceFile) {
+            var precedingToken = ts.findPrecedingToken(position, sourceFile);
+            if (!precedingToken ||
+                precedingToken.kind !== expectedTokenKind ||
+                position !== precedingToken.getEnd()) {
+                return undefined;
+            }
+            var current = precedingToken;
+            while (current &&
+                current.parent &&
+                current.parent.end === precedingToken.end &&
+                !isListElement(current.parent, current)) {
+                current = current.parent;
+            }
+            return current;
+        }
+        function isListElement(parent, node) {
+            switch (parent.kind) {
+                case 221:
+                case 222:
+                    return ts.rangeContainsRange(parent.members, node);
+                case 225:
+                    var body = parent.body;
+                    return body && body.kind === 199 && ts.rangeContainsRange(body.statements, node);
+                case 256:
+                case 199:
+                case 226:
+                    return ts.rangeContainsRange(parent.statements, node);
+                case 252:
+                    return ts.rangeContainsRange(parent.block.statements, node);
+            }
+            return false;
+        }
+        function findEnclosingNode(range, sourceFile) {
+            return find(sourceFile);
+            function find(n) {
+                var candidate = ts.forEachChild(n, function (c) { return ts.startEndContainsRange(c.getStart(sourceFile), c.end, range) && c; });
+                if (candidate) {
+                    var result = find(candidate);
+                    if (result) {
+                        return result;
+                    }
+                }
+                return n;
+            }
+        }
+        function prepareRangeContainsErrorFunction(errors, originalRange) {
+            if (!errors.length) {
+                return rangeHasNoErrors;
+            }
+            var sorted = errors
+                .filter(function (d) { return ts.rangeOverlapsWithStartEnd(originalRange, d.start, d.start + d.length); })
+                .sort(function (e1, e2) { return e1.start - e2.start; });
+            if (!sorted.length) {
+                return rangeHasNoErrors;
+            }
+            var index = 0;
+            return function (r) {
+                while (true) {
+                    if (index >= sorted.length) {
+                        return false;
+                    }
+                    var error = sorted[index];
+                    if (r.end <= error.start) {
+                        return false;
+                    }
+                    if (ts.startEndOverlapsWithStartEnd(r.pos, r.end, error.start, error.start + error.length)) {
+                        return true;
+                    }
+                    index++;
+                }
+            };
+            function rangeHasNoErrors(r) {
+                return false;
+            }
+        }
+        function getScanStartPosition(enclosingNode, originalRange, sourceFile) {
+            var start = enclosingNode.getStart(sourceFile);
+            if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
+                return start;
+            }
+            var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile);
+            if (!precedingToken) {
+                return enclosingNode.pos;
+            }
+            if (precedingToken.end >= originalRange.pos) {
+                return enclosingNode.pos;
+            }
+            return precedingToken.end;
+        }
+        function getOwnOrInheritedDelta(n, options, sourceFile) {
+            var previousLine = -1;
+            var child;
+            while (n) {
+                var line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
+                if (previousLine !== -1 && line !== previousLine) {
+                    break;
+                }
+                if (formatting.SmartIndenter.shouldIndentChildNode(n, child)) {
+                    return options.IndentSize;
+                }
+                previousLine = line;
+                child = n;
+                n = n.parent;
+            }
+            return 0;
+        }
+        function formatSpan(originalRange, sourceFile, options, rulesProvider, requestKind) {
+            var rangeContainsError = prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange);
+            var formattingContext = new formatting.FormattingContext(sourceFile, requestKind);
+            var enclosingNode = findEnclosingNode(originalRange, sourceFile);
+            var formattingScanner = formatting.getFormattingScanner(sourceFile, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end);
+            var initialIndentation = formatting.SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options);
+            var previousRangeHasError;
+            var previousRange;
+            var previousParent;
+            var previousRangeStartLine;
+            var lastIndentedLine;
+            var indentationOnLastIndentedLine;
+            var edits = [];
+            formattingScanner.advance();
+            if (formattingScanner.isOnToken()) {
+                var startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
+                var undecoratedStartLine = startLine;
+                if (enclosingNode.decorators) {
+                    undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
+                }
+                var delta = getOwnOrInheritedDelta(enclosingNode, options, sourceFile);
+                processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
+            }
+            if (!formattingScanner.isOnToken()) {
+                var leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
+                if (leadingTrivia) {
+                    processTrivia(leadingTrivia, enclosingNode, enclosingNode, undefined);
+                    trimTrailingWhitespacesForRemainingRange();
+                }
+            }
+            formattingScanner.close();
+            return edits;
+            function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) {
+                if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) ||
+                    ts.rangeContainsStartEnd(range, startPos, endPos)) {
+                    if (inheritedIndentation !== -1) {
+                        return inheritedIndentation;
+                    }
+                }
+                else {
+                    var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
+                    var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile);
+                    var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
+                    if (startLine !== parentStartLine || startPos === column) {
+                        return column;
+                    }
+                }
+                return -1;
+            }
+            function computeIndentation(node, startLine, inheritedIndentation, parent, parentDynamicIndentation, effectiveParentStartLine) {
+                var indentation = inheritedIndentation;
+                var delta = formatting.SmartIndenter.shouldIndentChildNode(node) ? options.IndentSize : 0;
+                if (effectiveParentStartLine === startLine) {
+                    indentation = startLine === lastIndentedLine
+                        ? indentationOnLastIndentedLine
+                        : parentDynamicIndentation.getIndentation();
+                    delta = Math.min(options.IndentSize, parentDynamicIndentation.getDelta(node) + delta);
+                }
+                else if (indentation === -1) {
+                    if (formatting.SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement(parent, node, startLine, sourceFile)) {
+                        indentation = parentDynamicIndentation.getIndentation();
+                    }
+                    else {
+                        indentation = parentDynamicIndentation.getIndentation() + parentDynamicIndentation.getDelta(node);
+                    }
+                }
+                return {
+                    indentation: indentation,
+                    delta: delta
+                };
+            }
+            function getFirstNonDecoratorTokenOfNode(node) {
+                if (node.modifiers && node.modifiers.length) {
+                    return node.modifiers[0].kind;
+                }
+                switch (node.kind) {
+                    case 221: return 73;
+                    case 222: return 107;
+                    case 220: return 87;
+                    case 224: return 224;
+                    case 149: return 123;
+                    case 150: return 131;
+                    case 147:
+                        if (node.asteriskToken) {
+                            return 37;
+                        }
+                    case 145:
+                    case 142:
+                        return node.name.kind;
+                }
+            }
+            function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
+                return {
+                    getIndentationForComment: function (kind, tokenIndentation, container) {
+                        switch (kind) {
+                            case 16:
+                            case 20:
+                            case 18:
+                                return indentation + getEffectiveDelta(delta, container);
+                        }
+                        return tokenIndentation !== -1 ? tokenIndentation : indentation;
+                    },
+                    getIndentationForToken: function (line, kind, container) {
+                        if (nodeStartLine !== line && node.decorators) {
+                            if (kind === getFirstNonDecoratorTokenOfNode(node)) {
+                                return indentation;
+                            }
+                        }
+                        switch (kind) {
+                            case 15:
+                            case 16:
+                            case 19:
+                            case 20:
+                            case 17:
+                            case 18:
+                            case 80:
+                            case 104:
+                            case 55:
+                                return indentation;
+                            default:
+                                return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
+                        }
+                    },
+                    getIndentation: function () { return indentation; },
+                    getDelta: function (child) { return getEffectiveDelta(delta, child); },
+                    recomputeIndentation: function (lineAdded) {
+                        if (node.parent && formatting.SmartIndenter.shouldIndentChildNode(node.parent, node)) {
+                            if (lineAdded) {
+                                indentation += options.IndentSize;
+                            }
+                            else {
+                                indentation -= options.IndentSize;
+                            }
+                            if (formatting.SmartIndenter.shouldIndentChildNode(node)) {
+                                delta = options.IndentSize;
+                            }
+                            else {
+                                delta = 0;
+                            }
+                        }
+                    }
+                };
+                function getEffectiveDelta(delta, child) {
+                    return formatting.SmartIndenter.nodeWillIndentChild(node, child, true) ? delta : 0;
+                }
+            }
+            function processNode(node, contextNode, nodeStartLine, undecoratedNodeStartLine, indentation, delta) {
+                if (!ts.rangeOverlapsWithStartEnd(originalRange, node.getStart(sourceFile), node.getEnd())) {
+                    return;
+                }
+                var nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
+                var childContextNode = contextNode;
+                ts.forEachChild(node, function (child) {
+                    processChildNode(child, -1, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, false);
+                }, function (nodes) {
+                    processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
+                });
+                while (formattingScanner.isOnToken()) {
+                    var tokenInfo = formattingScanner.readTokenInfo(node);
+                    if (tokenInfo.token.end > node.end) {
+                        break;
+                    }
+                    consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation);
+                }
+                function processChildNode(child, inheritedIndentation, parent, parentDynamicIndentation, parentStartLine, undecoratedParentStartLine, isListItem, isFirstListItem) {
+                    var childStartPos = child.getStart(sourceFile);
+                    var childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
+                    var undecoratedChildStartLine = childStartLine;
+                    if (child.decorators) {
+                        undecoratedChildStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(child, sourceFile)).line;
+                    }
+                    var childIndentationAmount = -1;
+                    if (isListItem) {
+                        childIndentationAmount = tryComputeIndentationForListItem(childStartPos, child.end, parentStartLine, originalRange, inheritedIndentation);
+                        if (childIndentationAmount !== -1) {
+                            inheritedIndentation = childIndentationAmount;
+                        }
+                    }
+                    if (!ts.rangeOverlapsWithStartEnd(originalRange, child.pos, child.end)) {
+                        return inheritedIndentation;
+                    }
+                    if (child.getFullWidth() === 0) {
+                        return inheritedIndentation;
+                    }
+                    while (formattingScanner.isOnToken()) {
+                        var tokenInfo = formattingScanner.readTokenInfo(node);
+                        if (tokenInfo.token.end > childStartPos) {
+                            break;
+                        }
+                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation);
+                    }
+                    if (!formattingScanner.isOnToken()) {
+                        return inheritedIndentation;
+                    }
+                    if (ts.isToken(child)) {
+                        var tokenInfo = formattingScanner.readTokenInfo(child);
+                        ts.Debug.assert(tokenInfo.token.end === child.end);
+                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
+                        return inheritedIndentation;
+                    }
+                    var effectiveParentStartLine = child.kind === 143 ? childStartLine : undecoratedParentStartLine;
+                    var childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
+                    processNode(child, childContextNode, childStartLine, undecoratedChildStartLine, childIndentation.indentation, childIndentation.delta);
+                    childContextNode = node;
+                    if (isFirstListItem && parent.kind === 170 && inheritedIndentation === -1) {
+                        inheritedIndentation = childIndentation.indentation;
+                    }
+                    return inheritedIndentation;
+                }
+                function processChildNodes(nodes, parent, parentStartLine, parentDynamicIndentation) {
+                    var listStartToken = getOpenTokenForList(parent, nodes);
+                    var listEndToken = getCloseTokenForOpenToken(listStartToken);
+                    var listDynamicIndentation = parentDynamicIndentation;
+                    var startLine = parentStartLine;
+                    if (listStartToken !== 0) {
+                        while (formattingScanner.isOnToken()) {
+                            var tokenInfo = formattingScanner.readTokenInfo(parent);
+                            if (tokenInfo.token.end > nodes.pos) {
+                                break;
+                            }
+                            else if (tokenInfo.token.kind === listStartToken) {
+                                startLine = sourceFile.getLineAndCharacterOfPosition(tokenInfo.token.pos).line;
+                                var indentation_1 = computeIndentation(tokenInfo.token, startLine, -1, parent, parentDynamicIndentation, parentStartLine);
+                                listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation_1.indentation, indentation_1.delta);
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
+                            }
+                            else {
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation);
+                            }
+                        }
+                    }
+                    var inheritedIndentation = -1;
+                    for (var i = 0; i < nodes.length; i++) {
+                        var child = nodes[i];
+                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, true, i === 0);
+                    }
+                    if (listEndToken !== 0) {
+                        if (formattingScanner.isOnToken()) {
+                            var tokenInfo = formattingScanner.readTokenInfo(parent);
+                            if (tokenInfo.token.kind === listEndToken && ts.rangeContainsRange(parent, tokenInfo.token)) {
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
+                            }
+                        }
+                    }
+                }
+                function consumeTokenAndAdvanceScanner(currentTokenInfo, parent, dynamicIndentation, container) {
+                    ts.Debug.assert(ts.rangeContainsRange(parent, currentTokenInfo.token));
+                    var lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
+                    var indentToken = false;
+                    if (currentTokenInfo.leadingTrivia) {
+                        processTrivia(currentTokenInfo.leadingTrivia, parent, childContextNode, dynamicIndentation);
+                    }
+                    var lineAdded;
+                    var isTokenInRange = ts.rangeContainsRange(originalRange, currentTokenInfo.token);
+                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
+                    if (isTokenInRange) {
+                        var rangeHasError = rangeContainsError(currentTokenInfo.token);
+                        var savePreviousRange = previousRange;
+                        lineAdded = processRange(currentTokenInfo.token, tokenStart, parent, childContextNode, dynamicIndentation);
+                        if (rangeHasError) {
+                            indentToken = false;
+                        }
+                        else {
+                            if (lineAdded !== undefined) {
+                                indentToken = lineAdded;
+                            }
+                            else {
+                                var prevEndLine = savePreviousRange && sourceFile.getLineAndCharacterOfPosition(savePreviousRange.end).line;
+                                indentToken = lastTriviaWasNewLine && tokenStart.line !== prevEndLine;
+                            }
+                        }
+                    }
+                    if (currentTokenInfo.trailingTrivia) {
+                        processTrivia(currentTokenInfo.trailingTrivia, parent, childContextNode, dynamicIndentation);
+                    }
+                    if (indentToken) {
+                        var tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
+                            dynamicIndentation.getIndentationForToken(tokenStart.line, currentTokenInfo.token.kind, container) :
+                            -1;
+                        var indentNextTokenOrTrivia = true;
+                        if (currentTokenInfo.leadingTrivia) {
+                            var commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
+                            for (var _i = 0, _a = currentTokenInfo.leadingTrivia; _i < _a.length; _i++) {
+                                var triviaItem = _a[_i];
+                                var triviaInRange = ts.rangeContainsRange(originalRange, triviaItem);
+                                switch (triviaItem.kind) {
+                                    case 3:
+                                        if (triviaInRange) {
+                                            indentMultilineComment(triviaItem, commentIndentation, !indentNextTokenOrTrivia);
+                                        }
+                                        indentNextTokenOrTrivia = false;
+                                        break;
+                                    case 2:
+                                        if (indentNextTokenOrTrivia && triviaInRange) {
+                                            insertIndentation(triviaItem.pos, commentIndentation, false);
+                                        }
+                                        indentNextTokenOrTrivia = false;
+                                        break;
+                                    case 4:
+                                        indentNextTokenOrTrivia = true;
+                                        break;
+                                }
+                            }
+                        }
+                        if (tokenIndentation !== -1 && indentNextTokenOrTrivia) {
+                            insertIndentation(currentTokenInfo.token.pos, tokenIndentation, lineAdded);
+                            lastIndentedLine = tokenStart.line;
+                            indentationOnLastIndentedLine = tokenIndentation;
+                        }
+                    }
+                    formattingScanner.advance();
+                    childContextNode = parent;
+                }
+            }
+            function processTrivia(trivia, parent, contextNode, dynamicIndentation) {
+                for (var _i = 0, trivia_1 = trivia; _i < trivia_1.length; _i++) {
+                    var triviaItem = trivia_1[_i];
+                    if (ts.isComment(triviaItem.kind) && ts.rangeContainsRange(originalRange, triviaItem)) {
+                        var triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
+                        processRange(triviaItem, triviaItemStart, parent, contextNode, dynamicIndentation);
+                    }
+                }
+            }
+            function processRange(range, rangeStart, parent, contextNode, dynamicIndentation) {
+                var rangeHasError = rangeContainsError(range);
+                var lineAdded;
+                if (!rangeHasError && !previousRangeHasError) {
+                    if (!previousRange) {
+                        var originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
+                        trimTrailingWhitespacesForLines(originalStart.line, rangeStart.line);
+                    }
+                    else {
+                        lineAdded =
+                            processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation);
+                    }
+                }
+                previousRange = range;
+                previousParent = parent;
+                previousRangeStartLine = rangeStart.line;
+                previousRangeHasError = rangeHasError;
+                return lineAdded;
+            }
+            function processPair(currentItem, currentStartLine, currentParent, previousItem, previousStartLine, previousParent, contextNode, dynamicIndentation) {
+                formattingContext.updateContext(previousItem, previousParent, currentItem, currentParent, contextNode);
+                var rule = rulesProvider.getRulesMap().GetRule(formattingContext);
+                var trimTrailingWhitespaces;
+                var lineAdded;
+                if (rule) {
+                    applyRuleEdits(rule, previousItem, previousStartLine, currentItem, currentStartLine);
+                    if (rule.Operation.Action & (2 | 8) && currentStartLine !== previousStartLine) {
+                        lineAdded = false;
+                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
+                            dynamicIndentation.recomputeIndentation(false);
+                        }
+                    }
+                    else if (rule.Operation.Action & 4 && currentStartLine === previousStartLine) {
+                        lineAdded = true;
+                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
+                            dynamicIndentation.recomputeIndentation(true);
+                        }
+                    }
+                    trimTrailingWhitespaces = !(rule.Operation.Action & 8) && rule.Flag !== 1;
+                }
+                else {
+                    trimTrailingWhitespaces = true;
+                }
+                if (currentStartLine !== previousStartLine && trimTrailingWhitespaces) {
+                    trimTrailingWhitespacesForLines(previousStartLine, currentStartLine, previousItem);
+                }
+                return lineAdded;
+            }
+            function insertIndentation(pos, indentation, lineAdded) {
+                var indentationString = getIndentationString(indentation, options);
+                if (lineAdded) {
+                    recordReplace(pos, 0, indentationString);
+                }
+                else {
+                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
+                    var startLinePosition = ts.getStartPositionOfLine(tokenStart.line, sourceFile);
+                    if (indentation !== tokenStart.character || indentationIsDifferent(indentationString, startLinePosition)) {
+                        recordReplace(startLinePosition, tokenStart.character, indentationString);
+                    }
+                }
+            }
+            function indentationIsDifferent(indentationString, startLinePosition) {
+                return indentationString !== sourceFile.text.substr(startLinePosition, indentationString.length);
+            }
+            function indentMultilineComment(commentRange, indentation, firstLineIsIndented) {
+                var startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
+                var endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
+                var parts;
+                if (startLine === endLine) {
+                    if (!firstLineIsIndented) {
+                        insertIndentation(commentRange.pos, indentation, false);
+                    }
+                    return;
+                }
+                else {
+                    parts = [];
+                    var startPos = commentRange.pos;
+                    for (var line = startLine; line < endLine; line++) {
+                        var endOfLine = ts.getEndLinePosition(line, sourceFile);
+                        parts.push({ pos: startPos, end: endOfLine });
+                        startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
+                    }
+                    parts.push({ pos: startPos, end: commentRange.end });
+                }
+                var startLinePos = ts.getStartPositionOfLine(startLine, sourceFile);
+                var nonWhitespaceColumnInFirstPart = formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(startLinePos, parts[0].pos, sourceFile, options);
+                if (indentation === nonWhitespaceColumnInFirstPart.column) {
+                    return;
+                }
+                var startIndex = 0;
+                if (firstLineIsIndented) {
+                    startIndex = 1;
+                    startLine++;
+                }
+                var delta = indentation - nonWhitespaceColumnInFirstPart.column;
+                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
+                    var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
+                    var nonWhitespaceCharacterAndColumn = i === 0
+                        ? nonWhitespaceColumnInFirstPart
+                        : formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(parts[i].pos, parts[i].end, sourceFile, options);
+                    var newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
+                    if (newIndentation > 0) {
+                        var indentationString = getIndentationString(newIndentation, options);
+                        recordReplace(startLinePos_1, nonWhitespaceCharacterAndColumn.character, indentationString);
+                    }
+                    else {
+                        recordDelete(startLinePos_1, nonWhitespaceCharacterAndColumn.character);
+                    }
+                }
+            }
+            function trimTrailingWhitespacesForLines(line1, line2, range) {
+                for (var line = line1; line < line2; line++) {
+                    var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
+                    var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
+                    if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
+                        continue;
+                    }
+                    var whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
+                    if (whitespaceStart !== -1) {
+                        ts.Debug.assert(whitespaceStart === lineStartPosition || !ts.isWhiteSpace(sourceFile.text.charCodeAt(whitespaceStart - 1)));
+                        recordDelete(whitespaceStart, lineEndPosition + 1 - whitespaceStart);
+                    }
+                }
+            }
+            function getTrailingWhitespaceStartPosition(start, end) {
+                var pos = end;
+                while (pos >= start && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
+                    pos--;
+                }
+                if (pos !== end) {
+                    return pos + 1;
+                }
+                return -1;
+            }
+            function trimTrailingWhitespacesForRemainingRange() {
+                var startPosition = previousRange ? previousRange.end : originalRange.pos;
+                var startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
+                var endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
+                trimTrailingWhitespacesForLines(startLine, endLine + 1, previousRange);
+            }
+            function newTextChange(start, len, newText) {
+                return { span: ts.createTextSpan(start, len), newText: newText };
+            }
+            function recordDelete(start, len) {
+                if (len) {
+                    edits.push(newTextChange(start, len, ""));
+                }
+            }
+            function recordReplace(start, len, newText) {
+                if (len || newText) {
+                    edits.push(newTextChange(start, len, newText));
+                }
+            }
+            function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
+                switch (rule.Operation.Action) {
+                    case 1:
+                        return;
+                    case 8:
+                        if (previousRange.end !== currentRange.pos) {
+                            recordDelete(previousRange.end, currentRange.pos - previousRange.end);
+                        }
+                        break;
+                    case 4:
+                        if (rule.Flag !== 1 && previousStartLine !== currentStartLine) {
+                            return;
+                        }
+                        var lineDelta = currentStartLine - previousStartLine;
+                        if (lineDelta !== 1) {
+                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, options.NewLineCharacter);
+                        }
+                        break;
+                    case 2:
+                        if (rule.Flag !== 1 && previousStartLine !== currentStartLine) {
+                            return;
+                        }
+                        var posDelta = currentRange.pos - previousRange.end;
+                        if (posDelta !== 1 || sourceFile.text.charCodeAt(previousRange.end) !== 32) {
+                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, " ");
+                        }
+                        break;
+                }
+            }
+        }
+        function getOpenTokenForList(node, list) {
+            switch (node.kind) {
+                case 148:
+                case 220:
+                case 179:
+                case 147:
+                case 146:
+                case 180:
+                    if (node.typeParameters === list) {
+                        return 25;
+                    }
+                    else if (node.parameters === list) {
+                        return 17;
+                    }
+                    break;
+                case 174:
+                case 175:
+                    if (node.typeArguments === list) {
+                        return 25;
+                    }
+                    else if (node.arguments === list) {
+                        return 17;
+                    }
+                    break;
+                case 155:
+                    if (node.typeArguments === list) {
+                        return 25;
+                    }
+            }
+            return 0;
+        }
+        function getCloseTokenForOpenToken(kind) {
+            switch (kind) {
+                case 17:
+                    return 18;
+                case 25:
+                    return 27;
+            }
+            return 0;
+        }
+        var internedSizes;
+        var internedTabsIndentation;
+        var internedSpacesIndentation;
+        function getIndentationString(indentation, options) {
+            var resetInternedStrings = !internedSizes || (internedSizes.tabSize !== options.TabSize || internedSizes.indentSize !== options.IndentSize);
+            if (resetInternedStrings) {
+                internedSizes = { tabSize: options.TabSize, indentSize: options.IndentSize };
+                internedTabsIndentation = internedSpacesIndentation = undefined;
+            }
+            if (!options.ConvertTabsToSpaces) {
+                var tabs = Math.floor(indentation / options.TabSize);
+                var spaces = indentation - tabs * options.TabSize;
+                var tabString = void 0;
+                if (!internedTabsIndentation) {
+                    internedTabsIndentation = [];
+                }
+                if (internedTabsIndentation[tabs] === undefined) {
+                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
+                }
+                else {
+                    tabString = internedTabsIndentation[tabs];
+                }
+                return spaces ? tabString + repeat(" ", spaces) : tabString;
+            }
+            else {
+                var spacesString = void 0;
+                var quotient = Math.floor(indentation / options.IndentSize);
+                var remainder = indentation % options.IndentSize;
+                if (!internedSpacesIndentation) {
+                    internedSpacesIndentation = [];
+                }
+                if (internedSpacesIndentation[quotient] === undefined) {
+                    spacesString = repeat(" ", options.IndentSize * quotient);
+                    internedSpacesIndentation[quotient] = spacesString;
+                }
+                else {
+                    spacesString = internedSpacesIndentation[quotient];
+                }
+                return remainder ? spacesString + repeat(" ", remainder) : spacesString;
+            }
+            function repeat(value, count) {
+                var s = "";
+                for (var i = 0; i < count; i++) {
+                    s += value;
+                }
+                return s;
+            }
+        }
+        formatting.getIndentationString = getIndentationString;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var SmartIndenter;
+        (function (SmartIndenter) {
+            function getIndentation(position, sourceFile, options) {
+                if (position > sourceFile.text.length) {
+                    return 0;
+                }
+                if (options.IndentStyle === ts.IndentStyle.None) {
+                    return 0;
+                }
+                var precedingToken = ts.findPrecedingToken(position, sourceFile);
+                if (!precedingToken) {
+                    return 0;
+                }
+                var precedingTokenIsLiteral = ts.isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
+                if (precedingTokenIsLiteral && precedingToken.getStart(sourceFile) <= position && precedingToken.end > position) {
+                    return 0;
+                }
+                var lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
+                if (options.IndentStyle === ts.IndentStyle.Block) {
+                    var current_1 = position;
+                    while (current_1 > 0) {
+                        var char = sourceFile.text.charCodeAt(current_1);
+                        if (!ts.isWhiteSpace(char) && !ts.isLineBreak(char)) {
+                            break;
+                        }
+                        current_1--;
+                    }
+                    var lineStart = ts.getLineStartPositionForPosition(current_1, sourceFile);
+                    return SmartIndenter.findFirstNonWhitespaceColumn(lineStart, current_1, sourceFile, options);
+                }
+                if (precedingToken.kind === 24 && precedingToken.parent.kind !== 187) {
+                    var actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
+                    if (actualIndentation !== -1) {
+                        return actualIndentation;
+                    }
+                }
+                var previous;
+                var current = precedingToken;
+                var currentStart;
+                var indentationDelta;
+                while (current) {
+                    if (ts.positionBelongsToNode(current, position, sourceFile) && shouldIndentChildNode(current, previous)) {
+                        currentStart = getStartLineAndCharacterForNode(current, sourceFile);
+                        if (nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile)) {
+                            indentationDelta = 0;
+                        }
+                        else {
+                            indentationDelta = lineAtPosition !== currentStart.line ? options.IndentSize : 0;
+                        }
+                        break;
+                    }
+                    var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
+                    if (actualIndentation !== -1) {
+                        return actualIndentation;
+                    }
+                    actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
+                    if (actualIndentation !== -1) {
+                        return actualIndentation + options.IndentSize;
+                    }
+                    previous = current;
+                    current = current.parent;
+                }
+                if (!current) {
+                    return 0;
+                }
+                return getIndentationForNodeWorker(current, currentStart, undefined, indentationDelta, sourceFile, options);
+            }
+            SmartIndenter.getIndentation = getIndentation;
+            function getIndentationForNode(n, ignoreActualIndentationRange, sourceFile, options) {
+                var start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+                return getIndentationForNodeWorker(n, start, ignoreActualIndentationRange, 0, sourceFile, options);
+            }
+            SmartIndenter.getIndentationForNode = getIndentationForNode;
+            function getIndentationForNodeWorker(current, currentStart, ignoreActualIndentationRange, indentationDelta, sourceFile, options) {
+                var parent = current.parent;
+                var parentStart;
+                while (parent) {
+                    var useActualIndentation = true;
+                    if (ignoreActualIndentationRange) {
+                        var start = current.getStart(sourceFile);
+                        useActualIndentation = start < ignoreActualIndentationRange.pos || start > ignoreActualIndentationRange.end;
+                    }
+                    if (useActualIndentation) {
+                        var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
+                        if (actualIndentation !== -1) {
+                            return actualIndentation + indentationDelta;
+                        }
+                    }
+                    parentStart = getParentStart(parent, current, sourceFile);
+                    var parentAndChildShareLine = parentStart.line === currentStart.line ||
+                        childStartsOnTheSameLineWithElseInIfStatement(parent, current, currentStart.line, sourceFile);
+                    if (useActualIndentation) {
+                        var actualIndentation = getActualIndentationForNode(current, parent, currentStart, parentAndChildShareLine, sourceFile, options);
+                        if (actualIndentation !== -1) {
+                            return actualIndentation + indentationDelta;
+                        }
+                        actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
+                        if (actualIndentation !== -1) {
+                            return actualIndentation + indentationDelta;
+                        }
+                    }
+                    if (shouldIndentChildNode(parent, current) && !parentAndChildShareLine) {
+                        indentationDelta += options.IndentSize;
+                    }
+                    current = parent;
+                    currentStart = parentStart;
+                    parent = current.parent;
+                }
+                return indentationDelta;
+            }
+            function getParentStart(parent, child, sourceFile) {
+                var containingList = getContainingList(child, sourceFile);
+                if (containingList) {
+                    return sourceFile.getLineAndCharacterOfPosition(containingList.pos);
+                }
+                return sourceFile.getLineAndCharacterOfPosition(parent.getStart(sourceFile));
+            }
+            function getActualIndentationForListItemBeforeComma(commaToken, sourceFile, options) {
+                var commaItemInfo = ts.findListItemInfo(commaToken);
+                if (commaItemInfo && commaItemInfo.listItemIndex > 0) {
+                    return deriveActualIndentationFromList(commaItemInfo.list.getChildren(), commaItemInfo.listItemIndex - 1, sourceFile, options);
+                }
+                else {
+                    return -1;
+                }
+            }
+            function getActualIndentationForNode(current, parent, currentLineAndChar, parentAndChildShareLine, sourceFile, options) {
+                var useActualIndentation = (ts.isDeclaration(current) || ts.isStatement(current)) &&
+                    (parent.kind === 256 || !parentAndChildShareLine);
+                if (!useActualIndentation) {
+                    return -1;
+                }
+                return findColumnForFirstNonWhitespaceCharacterInLine(currentLineAndChar, sourceFile, options);
+            }
+            function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile) {
+                var nextToken = ts.findNextToken(precedingToken, current);
+                if (!nextToken) {
+                    return false;
+                }
+                if (nextToken.kind === 15) {
+                    return true;
+                }
+                else if (nextToken.kind === 16) {
+                    var nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
+                    return lineAtPosition === nextTokenStartLine;
+                }
+                return false;
+            }
+            function getStartLineAndCharacterForNode(n, sourceFile) {
+                return sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+            }
+            function childStartsOnTheSameLineWithElseInIfStatement(parent, child, childStartLine, sourceFile) {
+                if (parent.kind === 203 && parent.elseStatement === child) {
+                    var elseKeyword = ts.findChildOfKind(parent, 80, sourceFile);
+                    ts.Debug.assert(elseKeyword !== undefined);
+                    var elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
+                    return elseKeywordStartLine === childStartLine;
+                }
+                return false;
+            }
+            SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement = childStartsOnTheSameLineWithElseInIfStatement;
+            function getContainingList(node, sourceFile) {
+                if (node.parent) {
+                    switch (node.parent.kind) {
+                        case 155:
+                            if (node.parent.typeArguments &&
+                                ts.rangeContainsStartEnd(node.parent.typeArguments, node.getStart(sourceFile), node.getEnd())) {
+                                return node.parent.typeArguments;
+                            }
+                            break;
+                        case 171:
+                            return node.parent.properties;
+                        case 170:
+                            return node.parent.elements;
+                        case 220:
+                        case 179:
+                        case 180:
+                        case 147:
+                        case 146:
+                        case 151:
+                        case 152: {
+                            var start = node.getStart(sourceFile);
+                            if (node.parent.typeParameters &&
+                                ts.rangeContainsStartEnd(node.parent.typeParameters, start, node.getEnd())) {
+                                return node.parent.typeParameters;
+                            }
+                            if (ts.rangeContainsStartEnd(node.parent.parameters, start, node.getEnd())) {
+                                return node.parent.parameters;
+                            }
+                            break;
+                        }
+                        case 175:
+                        case 174: {
+                            var start = node.getStart(sourceFile);
+                            if (node.parent.typeArguments &&
+                                ts.rangeContainsStartEnd(node.parent.typeArguments, start, node.getEnd())) {
+                                return node.parent.typeArguments;
+                            }
+                            if (node.parent.arguments &&
+                                ts.rangeContainsStartEnd(node.parent.arguments, start, node.getEnd())) {
+                                return node.parent.arguments;
+                            }
+                            break;
+                        }
+                    }
+                }
+                return undefined;
+            }
+            function getActualIndentationForListItem(node, sourceFile, options) {
+                var containingList = getContainingList(node, sourceFile);
+                return containingList ? getActualIndentationFromList(containingList) : -1;
+                function getActualIndentationFromList(list) {
+                    var index = ts.indexOf(list, node);
+                    return index !== -1 ? deriveActualIndentationFromList(list, index, sourceFile, options) : -1;
+                }
+            }
+            function getLineIndentationWhenExpressionIsInMultiLine(node, sourceFile, options) {
+                if (node.kind === 18) {
+                    return -1;
+                }
+                if (node.parent && (node.parent.kind === 174 ||
+                    node.parent.kind === 175) &&
+                    node.parent.expression !== node) {
+                    var fullCallOrNewExpression = node.parent.expression;
+                    var startingExpression = getStartingExpression(fullCallOrNewExpression);
+                    if (fullCallOrNewExpression === startingExpression) {
+                        return -1;
+                    }
+                    var fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
+                    var startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
+                    if (fullCallOrNewExpressionEnd.line === startingExpressionEnd.line) {
+                        return -1;
+                    }
+                    return findColumnForFirstNonWhitespaceCharacterInLine(fullCallOrNewExpressionEnd, sourceFile, options);
+                }
+                return -1;
+                function getStartingExpression(node) {
+                    while (true) {
+                        switch (node.kind) {
+                            case 174:
+                            case 175:
+                            case 172:
+                            case 173:
+                                node = node.expression;
+                                break;
+                            default:
+                                return node;
+                        }
+                    }
+                }
+            }
+            function deriveActualIndentationFromList(list, index, sourceFile, options) {
+                ts.Debug.assert(index >= 0 && index < list.length);
+                var node = list[index];
+                var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
+                for (var i = index - 1; i >= 0; i--) {
+                    if (list[i].kind === 24) {
+                        continue;
+                    }
+                    var prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
+                    if (prevEndLine !== lineAndCharacter.line) {
+                        return findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options);
+                    }
+                    lineAndCharacter = getStartLineAndCharacterForNode(list[i], sourceFile);
+                }
+                return -1;
+            }
+            function findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options) {
+                var lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
+                return findFirstNonWhitespaceColumn(lineStart, lineStart + lineAndCharacter.character, sourceFile, options);
+            }
+            function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
+                var character = 0;
+                var column = 0;
+                for (var pos = startPos; pos < endPos; pos++) {
+                    var ch = sourceFile.text.charCodeAt(pos);
+                    if (!ts.isWhiteSpace(ch)) {
+                        break;
+                    }
+                    if (ch === 9) {
+                        column += options.TabSize + (column % options.TabSize);
+                    }
+                    else {
+                        column++;
+                    }
+                    character++;
+                }
+                return { column: column, character: character };
+            }
+            SmartIndenter.findFirstNonWhitespaceCharacterAndColumn = findFirstNonWhitespaceCharacterAndColumn;
+            function findFirstNonWhitespaceColumn(startPos, endPos, sourceFile, options) {
+                return findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options).column;
+            }
+            SmartIndenter.findFirstNonWhitespaceColumn = findFirstNonWhitespaceColumn;
+            function nodeContentIsAlwaysIndented(kind) {
+                switch (kind) {
+                    case 202:
+                    case 221:
+                    case 192:
+                    case 222:
+                    case 224:
+                    case 223:
+                    case 170:
+                    case 199:
+                    case 226:
+                    case 171:
+                    case 159:
+                    case 161:
+                    case 227:
+                    case 250:
+                    case 249:
+                    case 178:
+                    case 172:
+                    case 174:
+                    case 175:
+                    case 200:
+                    case 218:
+                    case 235:
+                    case 211:
+                    case 188:
+                    case 168:
+                    case 167:
+                    case 243:
+                    case 242:
+                    case 248:
+                    case 146:
+                    case 151:
+                    case 152:
+                    case 142:
+                    case 156:
+                    case 157:
+                    case 164:
+                    case 176:
+                    case 184:
+                    case 233:
+                        return true;
+                }
+                return false;
+            }
+            function nodeWillIndentChild(parent, child, indentByDefault) {
+                var childKind = child ? child.kind : 0;
+                switch (parent.kind) {
+                    case 204:
+                    case 205:
+                    case 207:
+                    case 208:
+                    case 206:
+                    case 203:
+                    case 220:
+                    case 179:
+                    case 147:
+                    case 180:
+                    case 148:
+                    case 149:
+                    case 150:
+                        return childKind !== 199;
+                    case 241:
+                        return childKind !== 245;
+                }
+                return indentByDefault;
+            }
+            SmartIndenter.nodeWillIndentChild = nodeWillIndentChild;
+            function shouldIndentChildNode(parent, child) {
+                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, false);
+            }
+            SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
+        })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    ts.servicesVersion = "0.5";
+    var ScriptSnapshot;
+    (function (ScriptSnapshot) {
+        var StringScriptSnapshot = (function () {
+            function StringScriptSnapshot(text) {
+                this.text = text;
+            }
+            StringScriptSnapshot.prototype.getText = function (start, end) {
+                return this.text.substring(start, end);
+            };
+            StringScriptSnapshot.prototype.getLength = function () {
+                return this.text.length;
+            };
+            StringScriptSnapshot.prototype.getChangeRange = function (oldSnapshot) {
+                return undefined;
+            };
+            return StringScriptSnapshot;
+        }());
+        function fromString(text) {
+            return new StringScriptSnapshot(text);
+        }
+        ScriptSnapshot.fromString = fromString;
+    })(ScriptSnapshot = ts.ScriptSnapshot || (ts.ScriptSnapshot = {}));
+    var scanner = ts.createScanner(2, true);
+    var emptyArray = [];
+    var jsDocTagNames = [
+        "augments",
+        "author",
+        "argument",
+        "borrows",
+        "class",
+        "constant",
+        "constructor",
+        "constructs",
+        "default",
+        "deprecated",
+        "description",
+        "event",
+        "example",
+        "extends",
+        "field",
+        "fileOverview",
+        "function",
+        "ignore",
+        "inner",
+        "lends",
+        "link",
+        "memberOf",
+        "name",
+        "namespace",
+        "param",
+        "private",
+        "property",
+        "public",
+        "requires",
+        "returns",
+        "see",
+        "since",
+        "static",
+        "throws",
+        "type",
+        "typedef",
+        "property",
+        "prop",
+        "version"
+    ];
+    var jsDocCompletionEntries;
+    function createNode(kind, pos, end, flags, parent) {
+        var node = new NodeObject(kind, pos, end);
+        node.flags = flags;
+        node.parent = parent;
+        return node;
+    }
+    var NodeObject = (function () {
+        function NodeObject(kind, pos, end) {
+            this.kind = kind;
+            this.pos = pos;
+            this.end = end;
+            this.flags = 0;
+            this.parent = undefined;
+        }
+        NodeObject.prototype.getSourceFile = function () {
+            return ts.getSourceFileOfNode(this);
+        };
+        NodeObject.prototype.getStart = function (sourceFile, includeJsDocComment) {
+            return ts.getTokenPosOfNode(this, sourceFile, includeJsDocComment);
+        };
+        NodeObject.prototype.getFullStart = function () {
+            return this.pos;
+        };
+        NodeObject.prototype.getEnd = function () {
+            return this.end;
+        };
+        NodeObject.prototype.getWidth = function (sourceFile) {
+            return this.getEnd() - this.getStart(sourceFile);
+        };
+        NodeObject.prototype.getFullWidth = function () {
+            return this.end - this.pos;
+        };
+        NodeObject.prototype.getLeadingTriviaWidth = function (sourceFile) {
+            return this.getStart(sourceFile) - this.pos;
+        };
+        NodeObject.prototype.getFullText = function (sourceFile) {
+            return (sourceFile || this.getSourceFile()).text.substring(this.pos, this.end);
+        };
+        NodeObject.prototype.getText = function (sourceFile) {
+            return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
+        };
+        NodeObject.prototype.addSyntheticNodes = function (nodes, pos, end, useJSDocScanner) {
+            scanner.setTextPos(pos);
+            while (pos < end) {
+                var token = useJSDocScanner ? scanner.scanJSDocToken() : scanner.scan();
+                var textPos = scanner.getTextPos();
+                if (textPos <= end) {
+                    nodes.push(createNode(token, pos, textPos, 0, this));
+                }
+                pos = textPos;
+            }
+            return pos;
+        };
+        NodeObject.prototype.createSyntaxList = function (nodes) {
+            var list = createNode(282, nodes.pos, nodes.end, 0, this);
+            list._children = [];
+            var pos = nodes.pos;
+            for (var _i = 0, nodes_7 = nodes; _i < nodes_7.length; _i++) {
+                var node = nodes_7[_i];
+                if (pos < node.pos) {
+                    pos = this.addSyntheticNodes(list._children, pos, node.pos);
+                }
+                list._children.push(node);
+                pos = node.end;
+            }
+            if (pos < nodes.end) {
+                this.addSyntheticNodes(list._children, pos, nodes.end);
+            }
+            return list;
+        };
+        NodeObject.prototype.createChildren = function (sourceFile) {
+            var _this = this;
+            var children;
+            if (this.kind >= 139) {
+                scanner.setText((sourceFile || this.getSourceFile()).text);
+                children = [];
+                var pos_3 = this.pos;
+                var useJSDocScanner_1 = this.kind >= 273 && this.kind <= 281;
+                var processNode = function (node) {
+                    if (pos_3 < node.pos) {
+                        pos_3 = _this.addSyntheticNodes(children, pos_3, node.pos, useJSDocScanner_1);
+                    }
+                    children.push(node);
+                    pos_3 = node.end;
+                };
+                var processNodes = function (nodes) {
+                    if (pos_3 < nodes.pos) {
+                        pos_3 = _this.addSyntheticNodes(children, pos_3, nodes.pos, useJSDocScanner_1);
+                    }
+                    children.push(_this.createSyntaxList(nodes));
+                    pos_3 = nodes.end;
+                };
+                if (this.jsDocComments) {
+                    for (var _i = 0, _a = this.jsDocComments; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        processNode(jsDocComment);
+                    }
+                }
+                ts.forEachChild(this, processNode, processNodes);
+                if (pos_3 < this.end) {
+                    this.addSyntheticNodes(children, pos_3, this.end);
+                }
+                scanner.setText(undefined);
+            }
+            this._children = children || emptyArray;
+        };
+        NodeObject.prototype.getChildCount = function (sourceFile) {
+            if (!this._children)
+                this.createChildren(sourceFile);
+            return this._children.length;
+        };
+        NodeObject.prototype.getChildAt = function (index, sourceFile) {
+            if (!this._children)
+                this.createChildren(sourceFile);
+            return this._children[index];
+        };
+        NodeObject.prototype.getChildren = function (sourceFile) {
+            if (!this._children)
+                this.createChildren(sourceFile);
+            return this._children;
+        };
+        NodeObject.prototype.getFirstToken = function (sourceFile) {
+            var children = this.getChildren(sourceFile);
+            if (!children.length) {
+                return undefined;
+            }
+            var child = children[0];
+            return child.kind < 139 ? child : child.getFirstToken(sourceFile);
+        };
+        NodeObject.prototype.getLastToken = function (sourceFile) {
+            var children = this.getChildren(sourceFile);
+            var child = ts.lastOrUndefined(children);
+            if (!child) {
+                return undefined;
+            }
+            return child.kind < 139 ? child : child.getLastToken(sourceFile);
+        };
+        return NodeObject;
+    }());
+    var SymbolObject = (function () {
+        function SymbolObject(flags, name) {
+            this.flags = flags;
+            this.name = name;
+        }
+        SymbolObject.prototype.getFlags = function () {
+            return this.flags;
+        };
+        SymbolObject.prototype.getName = function () {
+            return this.name;
+        };
+        SymbolObject.prototype.getDeclarations = function () {
+            return this.declarations;
+        };
+        SymbolObject.prototype.getDocumentationComment = function () {
+            if (this.documentationComment === undefined) {
+                this.documentationComment = getJsDocCommentsFromDeclarations(this.declarations, this.name, !(this.flags & 4));
+            }
+            return this.documentationComment;
+        };
+        return SymbolObject;
+    }());
+    function getJsDocCommentsFromDeclarations(declarations, name, canUseParsedParamTagComments) {
+        var documentationComment = [];
+        var docComments = getJsDocCommentsSeparatedByNewLines();
+        ts.forEach(docComments, function (docComment) {
+            if (documentationComment.length) {
+                documentationComment.push(ts.lineBreakPart());
+            }
+            documentationComment.push(docComment);
+        });
+        return documentationComment;
+        function getJsDocCommentsSeparatedByNewLines() {
+            var paramTag = "@param";
+            var jsDocCommentParts = [];
+            ts.forEach(declarations, function (declaration, indexOfDeclaration) {
+                if (ts.indexOf(declarations, declaration) === indexOfDeclaration) {
+                    var sourceFileOfDeclaration = ts.getSourceFileOfNode(declaration);
+                    if (canUseParsedParamTagComments && declaration.kind === 142) {
+                        if ((declaration.parent.kind === 179 || declaration.parent.kind === 180) &&
+                            declaration.parent.parent.kind === 218) {
+                            addCommentParts(declaration.parent.parent.parent, sourceFileOfDeclaration, getCleanedParamJsDocComment);
+                        }
+                        addCommentParts(declaration.parent, sourceFileOfDeclaration, getCleanedParamJsDocComment);
+                    }
+                    if (declaration.kind === 225 && declaration.body.kind === 225) {
+                        return;
+                    }
+                    if ((declaration.kind === 179 || declaration.kind === 180) &&
+                        declaration.parent.kind === 218) {
+                        addCommentParts(declaration.parent.parent, sourceFileOfDeclaration, getCleanedJsDocComment);
+                    }
+                    while (declaration.kind === 225 && declaration.parent.kind === 225) {
+                        declaration = declaration.parent;
+                    }
+                    addCommentParts(declaration.kind === 218 ? declaration.parent.parent : declaration, sourceFileOfDeclaration, getCleanedJsDocComment);
+                    if (declaration.kind === 218) {
+                        var init = declaration.initializer;
+                        if (init && (init.kind === 179 || init.kind === 180)) {
+                            addCommentParts(init, sourceFileOfDeclaration, getCleanedJsDocComment);
+                        }
+                    }
+                }
+            });
+            return jsDocCommentParts;
+            function addCommentParts(commented, sourceFileOfDeclaration, getCommentPart) {
+                var ranges = getJsDocCommentTextRange(commented, sourceFileOfDeclaration);
+                ts.forEach(ranges, function (jsDocCommentTextRange) {
+                    var cleanedComment = getCommentPart(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration);
+                    if (cleanedComment) {
+                        ts.addRange(jsDocCommentParts, cleanedComment);
+                    }
+                });
+            }
+            function getJsDocCommentTextRange(node, sourceFile) {
+                return ts.map(ts.getJsDocComments(node, sourceFile), function (jsDocComment) {
+                    return {
+                        pos: jsDocComment.pos + "/*".length,
+                        end: jsDocComment.end - "*/".length
+                    };
+                });
+            }
+            function consumeWhiteSpacesOnTheLine(pos, end, sourceFile, maxSpacesToRemove) {
+                if (maxSpacesToRemove !== undefined) {
+                    end = Math.min(end, pos + maxSpacesToRemove);
+                }
+                for (; pos < end; pos++) {
+                    var ch = sourceFile.text.charCodeAt(pos);
+                    if (!ts.isWhiteSpace(ch) || ts.isLineBreak(ch)) {
+                        return pos;
+                    }
+                }
+                return end;
+            }
+            function consumeLineBreaks(pos, end, sourceFile) {
+                while (pos < end && ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
+                    pos++;
+                }
+                return pos;
+            }
+            function isName(pos, end, sourceFile, name) {
+                return pos + name.length < end &&
+                    sourceFile.text.substr(pos, name.length) === name &&
+                    (ts.isWhiteSpace(sourceFile.text.charCodeAt(pos + name.length)) ||
+                        ts.isLineBreak(sourceFile.text.charCodeAt(pos + name.length)));
+            }
+            function isParamTag(pos, end, sourceFile) {
+                return isName(pos, end, sourceFile, paramTag);
+            }
+            function pushDocCommentLineText(docComments, text, blankLineCount) {
+                while (blankLineCount) {
+                    blankLineCount--;
+                    docComments.push(ts.textPart(""));
+                }
+                docComments.push(ts.textPart(text));
+            }
+            function getCleanedJsDocComment(pos, end, sourceFile) {
+                var spacesToRemoveAfterAsterisk;
+                var docComments = [];
+                var blankLineCount = 0;
+                var isInParamTag = false;
+                while (pos < end) {
+                    var docCommentTextOfLine = "";
+                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile);
+                    if (pos < end && sourceFile.text.charCodeAt(pos) === 42) {
+                        var lineStartPos = pos + 1;
+                        pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, spacesToRemoveAfterAsterisk);
+                        if (spacesToRemoveAfterAsterisk === undefined && pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
+                            spacesToRemoveAfterAsterisk = pos - lineStartPos;
+                        }
+                    }
+                    else if (spacesToRemoveAfterAsterisk === undefined) {
+                        spacesToRemoveAfterAsterisk = 0;
+                    }
+                    while (pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
+                        var ch = sourceFile.text.charAt(pos);
+                        if (ch === "@") {
+                            if (isParamTag(pos, end, sourceFile)) {
+                                isInParamTag = true;
+                                pos += paramTag.length;
+                                continue;
+                            }
+                            else {
+                                isInParamTag = false;
+                            }
+                        }
+                        if (!isInParamTag) {
+                            docCommentTextOfLine += ch;
+                        }
+                        pos++;
+                    }
+                    pos = consumeLineBreaks(pos, end, sourceFile);
+                    if (docCommentTextOfLine) {
+                        pushDocCommentLineText(docComments, docCommentTextOfLine, blankLineCount);
+                        blankLineCount = 0;
+                    }
+                    else if (!isInParamTag && docComments.length) {
+                        blankLineCount++;
+                    }
+                }
+                return docComments;
+            }
+            function getCleanedParamJsDocComment(pos, end, sourceFile) {
+                var paramHelpStringMargin;
+                var paramDocComments = [];
+                while (pos < end) {
+                    if (isParamTag(pos, end, sourceFile)) {
+                        var blankLineCount = 0;
+                        var recordedParamTag = false;
+                        pos = consumeWhiteSpaces(pos + paramTag.length);
+                        if (pos >= end) {
+                            break;
+                        }
+                        if (sourceFile.text.charCodeAt(pos) === 123) {
+                            pos++;
+                            for (var curlies = 1; pos < end; pos++) {
+                                var charCode = sourceFile.text.charCodeAt(pos);
+                                if (charCode === 123) {
+                                    curlies++;
+                                    continue;
+                                }
+                                if (charCode === 125) {
+                                    curlies--;
+                                    if (curlies === 0) {
+                                        pos++;
+                                        break;
+                                    }
+                                    else {
+                                        continue;
+                                    }
+                                }
+                                if (charCode === 64) {
+                                    break;
+                                }
+                            }
+                            pos = consumeWhiteSpaces(pos);
+                            if (pos >= end) {
+                                break;
+                            }
+                        }
+                        if (isName(pos, end, sourceFile, name)) {
+                            pos = consumeWhiteSpaces(pos + name.length);
+                            if (pos >= end) {
+                                break;
+                            }
+                            var paramHelpString = "";
+                            var firstLineParamHelpStringPos = pos;
+                            while (pos < end) {
+                                var ch = sourceFile.text.charCodeAt(pos);
+                                if (ts.isLineBreak(ch)) {
+                                    if (paramHelpString) {
+                                        pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
+                                        paramHelpString = "";
+                                        blankLineCount = 0;
+                                        recordedParamTag = true;
+                                    }
+                                    else if (recordedParamTag) {
+                                        blankLineCount++;
+                                    }
+                                    setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos);
+                                    continue;
+                                }
+                                if (ch === 64) {
+                                    break;
+                                }
+                                paramHelpString += sourceFile.text.charAt(pos);
+                                pos++;
+                            }
+                            if (paramHelpString) {
+                                pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
+                            }
+                            paramHelpStringMargin = undefined;
+                        }
+                        if (sourceFile.text.charCodeAt(pos) === 64) {
+                            continue;
+                        }
+                    }
+                    pos++;
+                }
+                return paramDocComments;
+                function consumeWhiteSpaces(pos) {
+                    while (pos < end && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
+                        pos++;
+                    }
+                    return pos;
+                }
+                function setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos) {
+                    pos = consumeLineBreaks(pos, end, sourceFile);
+                    if (pos >= end) {
+                        return;
+                    }
+                    if (paramHelpStringMargin === undefined) {
+                        paramHelpStringMargin = sourceFile.getLineAndCharacterOfPosition(firstLineParamHelpStringPos).character;
+                    }
+                    var startOfLinePos = pos;
+                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile, paramHelpStringMargin);
+                    if (pos >= end) {
+                        return;
+                    }
+                    var consumedSpaces = pos - startOfLinePos;
+                    if (consumedSpaces < paramHelpStringMargin) {
+                        var ch = sourceFile.text.charCodeAt(pos);
+                        if (ch === 42) {
+                            pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, paramHelpStringMargin - consumedSpaces - 1);
+                        }
+                    }
+                }
+            }
+        }
+    }
+    var TypeObject = (function () {
+        function TypeObject(checker, flags) {
+            this.checker = checker;
+            this.flags = flags;
+        }
+        TypeObject.prototype.getFlags = function () {
+            return this.flags;
+        };
+        TypeObject.prototype.getSymbol = function () {
+            return this.symbol;
+        };
+        TypeObject.prototype.getProperties = function () {
+            return this.checker.getPropertiesOfType(this);
+        };
+        TypeObject.prototype.getProperty = function (propertyName) {
+            return this.checker.getPropertyOfType(this, propertyName);
+        };
+        TypeObject.prototype.getApparentProperties = function () {
+            return this.checker.getAugmentedPropertiesOfType(this);
+        };
+        TypeObject.prototype.getCallSignatures = function () {
+            return this.checker.getSignaturesOfType(this, 0);
+        };
+        TypeObject.prototype.getConstructSignatures = function () {
+            return this.checker.getSignaturesOfType(this, 1);
+        };
+        TypeObject.prototype.getStringIndexType = function () {
+            return this.checker.getIndexTypeOfType(this, 0);
+        };
+        TypeObject.prototype.getNumberIndexType = function () {
+            return this.checker.getIndexTypeOfType(this, 1);
+        };
+        TypeObject.prototype.getBaseTypes = function () {
+            return this.flags & (1024 | 2048)
+                ? this.checker.getBaseTypes(this)
+                : undefined;
+        };
+        TypeObject.prototype.getNonNullableType = function () {
+            return this.checker.getNonNullableType(this);
+        };
+        return TypeObject;
+    }());
+    var SignatureObject = (function () {
+        function SignatureObject(checker) {
+            this.checker = checker;
+        }
+        SignatureObject.prototype.getDeclaration = function () {
+            return this.declaration;
+        };
+        SignatureObject.prototype.getTypeParameters = function () {
+            return this.typeParameters;
+        };
+        SignatureObject.prototype.getParameters = function () {
+            return this.parameters;
+        };
+        SignatureObject.prototype.getReturnType = function () {
+            return this.checker.getReturnTypeOfSignature(this);
+        };
+        SignatureObject.prototype.getDocumentationComment = function () {
+            if (this.documentationComment === undefined) {
+                this.documentationComment = this.declaration ? getJsDocCommentsFromDeclarations([this.declaration], undefined, false) : [];
+            }
+            return this.documentationComment;
+        };
+        return SignatureObject;
+    }());
+    var SourceFileObject = (function (_super) {
+        __extends(SourceFileObject, _super);
+        function SourceFileObject(kind, pos, end) {
+            _super.call(this, kind, pos, end);
+        }
+        SourceFileObject.prototype.update = function (newText, textChangeRange) {
+            return ts.updateSourceFile(this, newText, textChangeRange);
+        };
+        SourceFileObject.prototype.getLineAndCharacterOfPosition = function (position) {
+            return ts.getLineAndCharacterOfPosition(this, position);
+        };
+        SourceFileObject.prototype.getLineStarts = function () {
+            return ts.getLineStarts(this);
+        };
+        SourceFileObject.prototype.getPositionOfLineAndCharacter = function (line, character) {
+            return ts.getPositionOfLineAndCharacter(this, line, character);
+        };
+        SourceFileObject.prototype.getNamedDeclarations = function () {
+            if (!this.namedDeclarations) {
+                this.namedDeclarations = this.computeNamedDeclarations();
+            }
+            return this.namedDeclarations;
+        };
+        SourceFileObject.prototype.computeNamedDeclarations = function () {
+            var result = {};
+            ts.forEachChild(this, visit);
+            return result;
+            function addDeclaration(declaration) {
+                var name = getDeclarationName(declaration);
+                if (name) {
+                    var declarations = getDeclarations(name);
+                    declarations.push(declaration);
+                }
+            }
+            function getDeclarations(name) {
+                return ts.getProperty(result, name) || (result[name] = []);
+            }
+            function getDeclarationName(declaration) {
+                if (declaration.name) {
+                    var result_2 = getTextOfIdentifierOrLiteral(declaration.name);
+                    if (result_2 !== undefined) {
+                        return result_2;
+                    }
+                    if (declaration.name.kind === 140) {
+                        var expr = declaration.name.expression;
+                        if (expr.kind === 172) {
+                            return expr.name.text;
+                        }
+                        return getTextOfIdentifierOrLiteral(expr);
+                    }
+                }
+                return undefined;
+            }
+            function getTextOfIdentifierOrLiteral(node) {
+                if (node) {
+                    if (node.kind === 69 ||
+                        node.kind === 9 ||
+                        node.kind === 8) {
+                        return node.text;
+                    }
+                }
+                return undefined;
+            }
+            function visit(node) {
+                switch (node.kind) {
+                    case 220:
+                    case 179:
+                    case 147:
+                    case 146:
+                        var functionDeclaration = node;
+                        var declarationName = getDeclarationName(functionDeclaration);
+                        if (declarationName) {
+                            var declarations = getDeclarations(declarationName);
+                            var lastDeclaration = ts.lastOrUndefined(declarations);
+                            if (lastDeclaration && functionDeclaration.parent === lastDeclaration.parent && functionDeclaration.symbol === lastDeclaration.symbol) {
+                                if (functionDeclaration.body && !lastDeclaration.body) {
+                                    declarations[declarations.length - 1] = functionDeclaration;
+                                }
+                            }
+                            else {
+                                declarations.push(functionDeclaration);
+                            }
+                            ts.forEachChild(node, visit);
+                        }
+                        break;
+                    case 221:
+                    case 192:
+                    case 222:
+                    case 223:
+                    case 224:
+                    case 225:
+                    case 229:
+                    case 238:
+                    case 234:
+                    case 229:
+                    case 231:
+                    case 232:
+                    case 149:
+                    case 150:
+                    case 159:
+                        addDeclaration(node);
+                        ts.forEachChild(node, visit);
+                        break;
+                    case 142:
+                        if (!(node.flags & 92)) {
+                            break;
+                        }
+                    case 218:
+                    case 169: {
+                        var decl = node;
+                        if (ts.isBindingPattern(decl.name)) {
+                            ts.forEachChild(decl.name, visit);
+                            break;
+                        }
+                        if (decl.initializer)
+                            visit(decl.initializer);
+                    }
+                    case 255:
+                    case 145:
+                    case 144:
+                        addDeclaration(node);
+                        break;
+                    case 236:
+                        if (node.exportClause) {
+                            ts.forEach(node.exportClause.elements, visit);
+                        }
+                        break;
+                    case 230:
+                        var importClause = node.importClause;
+                        if (importClause) {
+                            if (importClause.name) {
+                                addDeclaration(importClause);
+                            }
+                            if (importClause.namedBindings) {
+                                if (importClause.namedBindings.kind === 232) {
+                                    addDeclaration(importClause.namedBindings);
+                                }
+                                else {
+                                    ts.forEach(importClause.namedBindings.elements, visit);
+                                }
+                            }
+                        }
+                        break;
+                    default:
+                        ts.forEachChild(node, visit);
+                }
+            }
+        };
+        return SourceFileObject;
+    }(NodeObject));
+    var TextChange = (function () {
+        function TextChange() {
+        }
+        return TextChange;
+    }());
+    ts.TextChange = TextChange;
+    var HighlightSpanKind;
+    (function (HighlightSpanKind) {
+        HighlightSpanKind.none = "none";
+        HighlightSpanKind.definition = "definition";
+        HighlightSpanKind.reference = "reference";
+        HighlightSpanKind.writtenReference = "writtenReference";
+    })(HighlightSpanKind = ts.HighlightSpanKind || (ts.HighlightSpanKind = {}));
+    (function (IndentStyle) {
+        IndentStyle[IndentStyle["None"] = 0] = "None";
+        IndentStyle[IndentStyle["Block"] = 1] = "Block";
+        IndentStyle[IndentStyle["Smart"] = 2] = "Smart";
+    })(ts.IndentStyle || (ts.IndentStyle = {}));
+    var IndentStyle = ts.IndentStyle;
+    (function (SymbolDisplayPartKind) {
+        SymbolDisplayPartKind[SymbolDisplayPartKind["aliasName"] = 0] = "aliasName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["className"] = 1] = "className";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["enumName"] = 2] = "enumName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["fieldName"] = 3] = "fieldName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["interfaceName"] = 4] = "interfaceName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["keyword"] = 5] = "keyword";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["lineBreak"] = 6] = "lineBreak";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["numericLiteral"] = 7] = "numericLiteral";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["stringLiteral"] = 8] = "stringLiteral";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["localName"] = 9] = "localName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["methodName"] = 10] = "methodName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["moduleName"] = 11] = "moduleName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["operator"] = 12] = "operator";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["parameterName"] = 13] = "parameterName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["propertyName"] = 14] = "propertyName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["punctuation"] = 15] = "punctuation";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["space"] = 16] = "space";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["text"] = 17] = "text";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["typeParameterName"] = 18] = "typeParameterName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["enumMemberName"] = 19] = "enumMemberName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["functionName"] = 20] = "functionName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["regularExpressionLiteral"] = 21] = "regularExpressionLiteral";
+    })(ts.SymbolDisplayPartKind || (ts.SymbolDisplayPartKind = {}));
+    var SymbolDisplayPartKind = ts.SymbolDisplayPartKind;
+    (function (TokenClass) {
+        TokenClass[TokenClass["Punctuation"] = 0] = "Punctuation";
+        TokenClass[TokenClass["Keyword"] = 1] = "Keyword";
+        TokenClass[TokenClass["Operator"] = 2] = "Operator";
+        TokenClass[TokenClass["Comment"] = 3] = "Comment";
+        TokenClass[TokenClass["Whitespace"] = 4] = "Whitespace";
+        TokenClass[TokenClass["Identifier"] = 5] = "Identifier";
+        TokenClass[TokenClass["NumberLiteral"] = 6] = "NumberLiteral";
+        TokenClass[TokenClass["StringLiteral"] = 7] = "StringLiteral";
+        TokenClass[TokenClass["RegExpLiteral"] = 8] = "RegExpLiteral";
+    })(ts.TokenClass || (ts.TokenClass = {}));
+    var TokenClass = ts.TokenClass;
+    var ScriptElementKind;
+    (function (ScriptElementKind) {
+        ScriptElementKind.unknown = "";
+        ScriptElementKind.warning = "warning";
+        ScriptElementKind.keyword = "keyword";
+        ScriptElementKind.scriptElement = "script";
+        ScriptElementKind.moduleElement = "module";
+        ScriptElementKind.classElement = "class";
+        ScriptElementKind.localClassElement = "local class";
+        ScriptElementKind.interfaceElement = "interface";
+        ScriptElementKind.typeElement = "type";
+        ScriptElementKind.enumElement = "enum";
+        ScriptElementKind.variableElement = "var";
+        ScriptElementKind.localVariableElement = "local var";
+        ScriptElementKind.functionElement = "function";
+        ScriptElementKind.localFunctionElement = "local function";
+        ScriptElementKind.memberFunctionElement = "method";
+        ScriptElementKind.memberGetAccessorElement = "getter";
+        ScriptElementKind.memberSetAccessorElement = "setter";
+        ScriptElementKind.memberVariableElement = "property";
+        ScriptElementKind.constructorImplementationElement = "constructor";
+        ScriptElementKind.callSignatureElement = "call";
+        ScriptElementKind.indexSignatureElement = "index";
+        ScriptElementKind.constructSignatureElement = "construct";
+        ScriptElementKind.parameterElement = "parameter";
+        ScriptElementKind.typeParameterElement = "type parameter";
+        ScriptElementKind.primitiveType = "primitive type";
+        ScriptElementKind.label = "label";
+        ScriptElementKind.alias = "alias";
+        ScriptElementKind.constElement = "const";
+        ScriptElementKind.letElement = "let";
+    })(ScriptElementKind = ts.ScriptElementKind || (ts.ScriptElementKind = {}));
+    var ScriptElementKindModifier;
+    (function (ScriptElementKindModifier) {
+        ScriptElementKindModifier.none = "";
+        ScriptElementKindModifier.publicMemberModifier = "public";
+        ScriptElementKindModifier.privateMemberModifier = "private";
+        ScriptElementKindModifier.protectedMemberModifier = "protected";
+        ScriptElementKindModifier.exportedModifier = "export";
+        ScriptElementKindModifier.ambientModifier = "declare";
+        ScriptElementKindModifier.staticModifier = "static";
+        ScriptElementKindModifier.abstractModifier = "abstract";
+    })(ScriptElementKindModifier = ts.ScriptElementKindModifier || (ts.ScriptElementKindModifier = {}));
+    var ClassificationTypeNames = (function () {
+        function ClassificationTypeNames() {
+        }
+        ClassificationTypeNames.comment = "comment";
+        ClassificationTypeNames.identifier = "identifier";
+        ClassificationTypeNames.keyword = "keyword";
+        ClassificationTypeNames.numericLiteral = "number";
+        ClassificationTypeNames.operator = "operator";
+        ClassificationTypeNames.stringLiteral = "string";
+        ClassificationTypeNames.whiteSpace = "whitespace";
+        ClassificationTypeNames.text = "text";
+        ClassificationTypeNames.punctuation = "punctuation";
+        ClassificationTypeNames.className = "class name";
+        ClassificationTypeNames.enumName = "enum name";
+        ClassificationTypeNames.interfaceName = "interface name";
+        ClassificationTypeNames.moduleName = "module name";
+        ClassificationTypeNames.typeParameterName = "type parameter name";
+        ClassificationTypeNames.typeAliasName = "type alias name";
+        ClassificationTypeNames.parameterName = "parameter name";
+        ClassificationTypeNames.docCommentTagName = "doc comment tag name";
+        ClassificationTypeNames.jsxOpenTagName = "jsx open tag name";
+        ClassificationTypeNames.jsxCloseTagName = "jsx close tag name";
+        ClassificationTypeNames.jsxSelfClosingTagName = "jsx self closing tag name";
+        ClassificationTypeNames.jsxAttribute = "jsx attribute";
+        ClassificationTypeNames.jsxText = "jsx text";
+        ClassificationTypeNames.jsxAttributeStringLiteralValue = "jsx attribute string literal value";
+        return ClassificationTypeNames;
+    }());
+    ts.ClassificationTypeNames = ClassificationTypeNames;
+    function displayPartsToString(displayParts) {
+        if (displayParts) {
+            return ts.map(displayParts, function (displayPart) { return displayPart.text; }).join("");
+        }
+        return "";
+    }
+    ts.displayPartsToString = displayPartsToString;
+    function isLocalVariableOrFunction(symbol) {
+        if (symbol.parent) {
+            return false;
+        }
+        return ts.forEach(symbol.declarations, function (declaration) {
+            if (declaration.kind === 179) {
+                return true;
+            }
+            if (declaration.kind !== 218 && declaration.kind !== 220) {
+                return false;
+            }
+            for (var parent_15 = declaration.parent; !ts.isFunctionBlock(parent_15); parent_15 = parent_15.parent) {
+                if (parent_15.kind === 256 || parent_15.kind === 226) {
+                    return false;
+                }
+            }
+            return true;
+        });
+    }
+    function getDefaultCompilerOptions() {
+        return {
+            target: 1,
+            jsx: 1
+        };
+    }
+    ts.getDefaultCompilerOptions = getDefaultCompilerOptions;
+    var HostCache = (function () {
+        function HostCache(host, getCanonicalFileName) {
+            this.host = host;
+            this.getCanonicalFileName = getCanonicalFileName;
+            this.currentDirectory = host.getCurrentDirectory();
+            this.fileNameToEntry = ts.createFileMap();
+            var rootFileNames = host.getScriptFileNames();
+            for (var _i = 0, rootFileNames_1 = rootFileNames; _i < rootFileNames_1.length; _i++) {
+                var fileName = rootFileNames_1[_i];
+                this.createEntry(fileName, ts.toPath(fileName, this.currentDirectory, getCanonicalFileName));
+            }
+            this._compilationSettings = host.getCompilationSettings() || getDefaultCompilerOptions();
+        }
+        HostCache.prototype.compilationSettings = function () {
+            return this._compilationSettings;
+        };
+        HostCache.prototype.createEntry = function (fileName, path) {
+            var entry;
+            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
+            if (scriptSnapshot) {
+                entry = {
+                    hostFileName: fileName,
+                    version: this.host.getScriptVersion(fileName),
+                    scriptSnapshot: scriptSnapshot,
+                    scriptKind: ts.getScriptKind(fileName, this.host)
+                };
+            }
+            this.fileNameToEntry.set(path, entry);
+            return entry;
+        };
+        HostCache.prototype.getEntry = function (path) {
+            return this.fileNameToEntry.get(path);
+        };
+        HostCache.prototype.contains = function (path) {
+            return this.fileNameToEntry.contains(path);
+        };
+        HostCache.prototype.getOrCreateEntry = function (fileName) {
+            var path = ts.toPath(fileName, this.currentDirectory, this.getCanonicalFileName);
+            return this.getOrCreateEntryByPath(fileName, path);
+        };
+        HostCache.prototype.getOrCreateEntryByPath = function (fileName, path) {
+            return this.contains(path)
+                ? this.getEntry(path)
+                : this.createEntry(fileName, path);
+        };
+        HostCache.prototype.getRootFileNames = function () {
+            var fileNames = [];
+            this.fileNameToEntry.forEachValue(function (path, value) {
+                if (value) {
+                    fileNames.push(value.hostFileName);
+                }
+            });
+            return fileNames;
+        };
+        HostCache.prototype.getVersion = function (path) {
+            var file = this.getEntry(path);
+            return file && file.version;
+        };
+        HostCache.prototype.getScriptSnapshot = function (path) {
+            var file = this.getEntry(path);
+            return file && file.scriptSnapshot;
+        };
+        return HostCache;
+    }());
+    var SyntaxTreeCache = (function () {
+        function SyntaxTreeCache(host) {
+            this.host = host;
+        }
+        SyntaxTreeCache.prototype.getCurrentSourceFile = function (fileName) {
+            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
+            if (!scriptSnapshot) {
+                throw new Error("Could not find file: '" + fileName + "'.");
+            }
+            var scriptKind = ts.getScriptKind(fileName, this.host);
+            var version = this.host.getScriptVersion(fileName);
+            var sourceFile;
+            if (this.currentFileName !== fileName) {
+                sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, 2, version, true, scriptKind);
+            }
+            else if (this.currentFileVersion !== version) {
+                var editRange = scriptSnapshot.getChangeRange(this.currentFileScriptSnapshot);
+                sourceFile = updateLanguageServiceSourceFile(this.currentSourceFile, scriptSnapshot, version, editRange);
+            }
+            if (sourceFile) {
+                this.currentFileVersion = version;
+                this.currentFileName = fileName;
+                this.currentFileScriptSnapshot = scriptSnapshot;
+                this.currentSourceFile = sourceFile;
+            }
+            return this.currentSourceFile;
+        };
+        return SyntaxTreeCache;
+    }());
+    function setSourceFileFields(sourceFile, scriptSnapshot, version) {
+        sourceFile.version = version;
+        sourceFile.scriptSnapshot = scriptSnapshot;
+    }
+    var commandLineOptions_stringToEnum;
+    function fixupCompilerOptions(options, diagnostics) {
+        commandLineOptions_stringToEnum = commandLineOptions_stringToEnum || ts.filter(ts.optionDeclarations, function (o) {
+            return typeof o.type === "object" && !ts.forEachValue(o.type, function (v) { return typeof v !== "number"; });
+        });
+        options = ts.clone(options);
+        var _loop_2 = function(opt) {
+            if (!ts.hasProperty(options, opt.name)) {
+                return "continue";
+            }
+            var value = options[opt.name];
+            if (typeof value === "string") {
+                options[opt.name] = ts.parseCustomTypeOption(opt, value, diagnostics);
+            }
+            else {
+                if (!ts.forEachValue(opt.type, function (v) { return v === value; })) {
+                    diagnostics.push(ts.createCompilerDiagnosticForInvalidCustomType(opt));
+                }
+            }
+        };
+        for (var _i = 0, commandLineOptions_stringToEnum_1 = commandLineOptions_stringToEnum; _i < commandLineOptions_stringToEnum_1.length; _i++) {
+            var opt = commandLineOptions_stringToEnum_1[_i];
+            _loop_2(opt);
+        }
+        return options;
+    }
+    function transpileModule(input, transpileOptions) {
+        var diagnostics = [];
+        var options = transpileOptions.compilerOptions ? fixupCompilerOptions(transpileOptions.compilerOptions, diagnostics) : getDefaultCompilerOptions();
+        options.isolatedModules = true;
+        options.suppressOutputPathCheck = true;
+        options.allowNonTsExtensions = true;
+        options.noLib = true;
+        options.noResolve = true;
+        var inputFileName = transpileOptions.fileName || (options.jsx ? "module.tsx" : "module.ts");
+        var sourceFile = ts.createSourceFile(inputFileName, input, options.target);
+        if (transpileOptions.moduleName) {
+            sourceFile.moduleName = transpileOptions.moduleName;
+        }
+        sourceFile.renamedDependencies = transpileOptions.renamedDependencies;
+        var newLine = ts.getNewLineCharacter(options);
+        var outputText;
+        var sourceMapText;
+        var compilerHost = {
+            getSourceFile: function (fileName, target) { return fileName === ts.normalizePath(inputFileName) ? sourceFile : undefined; },
+            writeFile: function (name, text, writeByteOrderMark) {
+                if (ts.fileExtensionIs(name, ".map")) {
+                    ts.Debug.assert(sourceMapText === undefined, "Unexpected multiple source map outputs for the file '" + name + "'");
+                    sourceMapText = text;
+                }
+                else {
+                    ts.Debug.assert(outputText === undefined, "Unexpected multiple outputs for the file: '" + name + "'");
+                    outputText = text;
+                }
+            },
+            getDefaultLibFileName: function () { return "lib.d.ts"; },
+            useCaseSensitiveFileNames: function () { return false; },
+            getCanonicalFileName: function (fileName) { return fileName; },
+            getCurrentDirectory: function () { return ""; },
+            getNewLine: function () { return newLine; },
+            fileExists: function (fileName) { return fileName === inputFileName; },
+            readFile: function (fileName) { return ""; },
+            directoryExists: function (directoryExists) { return true; }
+        };
+        var program = ts.createProgram([inputFileName], options, compilerHost);
+        if (transpileOptions.reportDiagnostics) {
+            ts.addRange(diagnostics, program.getSyntacticDiagnostics(sourceFile));
+            ts.addRange(diagnostics, program.getOptionsDiagnostics());
+        }
+        program.emit();
+        ts.Debug.assert(outputText !== undefined, "Output generation failed");
+        return { outputText: outputText, diagnostics: diagnostics, sourceMapText: sourceMapText };
+    }
+    ts.transpileModule = transpileModule;
+    function transpile(input, compilerOptions, fileName, diagnostics, moduleName) {
+        var output = transpileModule(input, { compilerOptions: compilerOptions, fileName: fileName, reportDiagnostics: !!diagnostics, moduleName: moduleName });
+        ts.addRange(diagnostics, output.diagnostics);
+        return output.outputText;
+    }
+    ts.transpile = transpile;
+    function createLanguageServiceSourceFile(fileName, scriptSnapshot, scriptTarget, version, setNodeParents, scriptKind) {
+        var text = scriptSnapshot.getText(0, scriptSnapshot.getLength());
+        var sourceFile = ts.createSourceFile(fileName, text, scriptTarget, setNodeParents, scriptKind);
+        setSourceFileFields(sourceFile, scriptSnapshot, version);
+        return sourceFile;
+    }
+    ts.createLanguageServiceSourceFile = createLanguageServiceSourceFile;
+    ts.disableIncrementalParsing = false;
+    function updateLanguageServiceSourceFile(sourceFile, scriptSnapshot, version, textChangeRange, aggressiveChecks) {
+        if (textChangeRange) {
+            if (version !== sourceFile.version) {
+                if (!ts.disableIncrementalParsing) {
+                    var newText = void 0;
+                    var prefix = textChangeRange.span.start !== 0
+                        ? sourceFile.text.substr(0, textChangeRange.span.start)
+                        : "";
+                    var suffix = ts.textSpanEnd(textChangeRange.span) !== sourceFile.text.length
+                        ? sourceFile.text.substr(ts.textSpanEnd(textChangeRange.span))
+                        : "";
+                    if (textChangeRange.newLength === 0) {
+                        newText = prefix && suffix ? prefix + suffix : prefix || suffix;
+                    }
+                    else {
+                        var changedText = scriptSnapshot.getText(textChangeRange.span.start, textChangeRange.span.start + textChangeRange.newLength);
+                        newText = prefix && suffix
+                            ? prefix + changedText + suffix
+                            : prefix
+                                ? (prefix + changedText)
+                                : (changedText + suffix);
+                    }
+                    var newSourceFile = ts.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
+                    setSourceFileFields(newSourceFile, scriptSnapshot, version);
+                    newSourceFile.nameTable = undefined;
+                    if (sourceFile !== newSourceFile && sourceFile.scriptSnapshot) {
+                        if (sourceFile.scriptSnapshot.dispose) {
+                            sourceFile.scriptSnapshot.dispose();
+                        }
+                        sourceFile.scriptSnapshot = undefined;
+                    }
+                    return newSourceFile;
+                }
+            }
+        }
+        return createLanguageServiceSourceFile(sourceFile.fileName, scriptSnapshot, sourceFile.languageVersion, version, true, sourceFile.scriptKind);
+    }
+    ts.updateLanguageServiceSourceFile = updateLanguageServiceSourceFile;
+    function createDocumentRegistry(useCaseSensitiveFileNames, currentDirectory) {
+        if (currentDirectory === void 0) { currentDirectory = ""; }
+        var buckets = {};
+        var getCanonicalFileName = ts.createGetCanonicalFileName(!!useCaseSensitiveFileNames);
+        function getKeyForCompilationSettings(settings) {
+            return ("_" + settings.target + "|" + settings.module + "|" + settings.noResolve + "|" + settings.jsx + "|" + settings.allowJs + "|" + settings.baseUrl + "|" + settings.typesRoot + "|" + settings.typesSearchPaths + "|" + JSON.stringify(settings.rootDirs) + "|" + JSON.stringify(settings.paths));
+        }
+        function getBucketForCompilationSettings(key, createIfMissing) {
+            var bucket = ts.lookUp(buckets, key);
+            if (!bucket && createIfMissing) {
+                buckets[key] = bucket = ts.createFileMap();
+            }
+            return bucket;
+        }
+        function reportStats() {
+            var bucketInfoArray = Object.keys(buckets).filter(function (name) { return name && name.charAt(0) === "_"; }).map(function (name) {
+                var entries = ts.lookUp(buckets, name);
+                var sourceFiles = [];
+                entries.forEachValue(function (key, entry) {
+                    sourceFiles.push({
+                        name: key,
+                        refCount: entry.languageServiceRefCount,
+                        references: entry.owners.slice(0)
+                    });
+                });
+                sourceFiles.sort(function (x, y) { return y.refCount - x.refCount; });
+                return {
+                    bucket: name,
+                    sourceFiles: sourceFiles
+                };
+            });
+            return JSON.stringify(bucketInfoArray, undefined, 2);
+        }
+        function acquireDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        }
+        function acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
+            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, true, scriptKind);
+        }
+        function updateDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        }
+        function updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
+            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, false, scriptKind);
+        }
+        function acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, acquiring, scriptKind) {
+            var bucket = getBucketForCompilationSettings(key, true);
+            var entry = bucket.get(path);
+            if (!entry) {
+                ts.Debug.assert(acquiring, "How could we be trying to update a document that the registry doesn't have?");
+                var sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, compilationSettings.target, version, false, scriptKind);
+                entry = {
+                    sourceFile: sourceFile,
+                    languageServiceRefCount: 0,
+                    owners: []
+                };
+                bucket.set(path, entry);
+            }
+            else {
+                if (entry.sourceFile.version !== version) {
+                    entry.sourceFile = updateLanguageServiceSourceFile(entry.sourceFile, scriptSnapshot, version, scriptSnapshot.getChangeRange(entry.sourceFile.scriptSnapshot));
+                }
+            }
+            if (acquiring) {
+                entry.languageServiceRefCount++;
+            }
+            return entry.sourceFile;
+        }
+        function releaseDocument(fileName, compilationSettings) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return releaseDocumentWithKey(path, key);
+        }
+        function releaseDocumentWithKey(path, key) {
+            var bucket = getBucketForCompilationSettings(key, false);
+            ts.Debug.assert(bucket !== undefined);
+            var entry = bucket.get(path);
+            entry.languageServiceRefCount--;
+            ts.Debug.assert(entry.languageServiceRefCount >= 0);
+            if (entry.languageServiceRefCount === 0) {
+                bucket.remove(path);
+            }
+        }
+        return {
+            acquireDocument: acquireDocument,
+            acquireDocumentWithKey: acquireDocumentWithKey,
+            updateDocument: updateDocument,
+            updateDocumentWithKey: updateDocumentWithKey,
+            releaseDocument: releaseDocument,
+            releaseDocumentWithKey: releaseDocumentWithKey,
+            reportStats: reportStats,
+            getKeyForCompilationSettings: getKeyForCompilationSettings
+        };
+    }
+    ts.createDocumentRegistry = createDocumentRegistry;
+    function preProcessFile(sourceText, readImportFiles, detectJavaScriptImports) {
+        if (readImportFiles === void 0) { readImportFiles = true; }
+        if (detectJavaScriptImports === void 0) { detectJavaScriptImports = false; }
+        var referencedFiles = [];
+        var typeReferenceDirectives = [];
+        var importedFiles = [];
+        var ambientExternalModules;
+        var isNoDefaultLib = false;
+        var braceNesting = 0;
+        var externalModule = false;
+        function nextToken() {
+            var token = scanner.scan();
+            if (token === 15) {
+                braceNesting++;
+            }
+            else if (token === 16) {
+                braceNesting--;
+            }
+            return token;
+        }
+        function processTripleSlashDirectives() {
+            var commentRanges = ts.getLeadingCommentRanges(sourceText, 0);
+            ts.forEach(commentRanges, function (commentRange) {
+                var comment = sourceText.substring(commentRange.pos, commentRange.end);
+                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, commentRange);
+                if (referencePathMatchResult) {
+                    isNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
+                    var fileReference = referencePathMatchResult.fileReference;
+                    if (fileReference) {
+                        var collection = referencePathMatchResult.isTypeReferenceDirective
+                            ? typeReferenceDirectives
+                            : referencedFiles;
+                        collection.push(fileReference);
+                    }
+                }
+            });
+        }
+        function getFileReference() {
+            var file = scanner.getTokenValue();
+            var pos = scanner.getTokenPos();
+            return {
+                fileName: file,
+                pos: pos,
+                end: pos + file.length
+            };
+        }
+        function recordAmbientExternalModule() {
+            if (!ambientExternalModules) {
+                ambientExternalModules = [];
+            }
+            ambientExternalModules.push({ ref: getFileReference(), depth: braceNesting });
+        }
+        function recordModuleName() {
+            importedFiles.push(getFileReference());
+            markAsExternalModuleIfTopLevel();
+        }
+        function markAsExternalModuleIfTopLevel() {
+            if (braceNesting === 0) {
+                externalModule = true;
+            }
+        }
+        function tryConsumeDeclare() {
+            var token = scanner.getToken();
+            if (token === 122) {
+                token = nextToken();
+                if (token === 125) {
+                    token = nextToken();
+                    if (token === 9) {
+                        recordAmbientExternalModule();
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeImport() {
+            var token = scanner.getToken();
+            if (token === 89) {
+                token = nextToken();
+                if (token === 9) {
+                    recordModuleName();
+                    return true;
+                }
+                else {
+                    if (token === 69 || ts.isKeyword(token)) {
+                        token = nextToken();
+                        if (token === 136) {
+                            token = nextToken();
+                            if (token === 9) {
+                                recordModuleName();
+                                return true;
+                            }
+                        }
+                        else if (token === 56) {
+                            if (tryConsumeRequireCall(true)) {
+                                return true;
+                            }
+                        }
+                        else if (token === 24) {
+                            token = nextToken();
+                        }
+                        else {
+                            return true;
+                        }
+                    }
+                    if (token === 15) {
+                        token = nextToken();
+                        while (token !== 16 && token !== 1) {
+                            token = nextToken();
+                        }
+                        if (token === 16) {
+                            token = nextToken();
+                            if (token === 136) {
+                                token = nextToken();
+                                if (token === 9) {
+                                    recordModuleName();
+                                }
+                            }
+                        }
+                    }
+                    else if (token === 37) {
+                        token = nextToken();
+                        if (token === 116) {
+                            token = nextToken();
+                            if (token === 69 || ts.isKeyword(token)) {
+                                token = nextToken();
+                                if (token === 136) {
+                                    token = nextToken();
+                                    if (token === 9) {
+                                        recordModuleName();
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeExport() {
+            var token = scanner.getToken();
+            if (token === 82) {
+                markAsExternalModuleIfTopLevel();
+                token = nextToken();
+                if (token === 15) {
+                    token = nextToken();
+                    while (token !== 16 && token !== 1) {
+                        token = nextToken();
+                    }
+                    if (token === 16) {
+                        token = nextToken();
+                        if (token === 136) {
+                            token = nextToken();
+                            if (token === 9) {
+                                recordModuleName();
+                            }
+                        }
+                    }
+                }
+                else if (token === 37) {
+                    token = nextToken();
+                    if (token === 136) {
+                        token = nextToken();
+                        if (token === 9) {
+                            recordModuleName();
+                        }
+                    }
+                }
+                else if (token === 89) {
+                    token = nextToken();
+                    if (token === 69 || ts.isKeyword(token)) {
+                        token = nextToken();
+                        if (token === 56) {
+                            if (tryConsumeRequireCall(true)) {
+                                return true;
+                            }
+                        }
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeRequireCall(skipCurrentToken) {
+            var token = skipCurrentToken ? nextToken() : scanner.getToken();
+            if (token === 129) {
+                token = nextToken();
+                if (token === 17) {
+                    token = nextToken();
+                    if (token === 9) {
+                        recordModuleName();
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeDefine() {
+            var token = scanner.getToken();
+            if (token === 69 && scanner.getTokenValue() === "define") {
+                token = nextToken();
+                if (token !== 17) {
+                    return true;
+                }
+                token = nextToken();
+                if (token === 9) {
+                    token = nextToken();
+                    if (token === 24) {
+                        token = nextToken();
+                    }
+                    else {
+                        return true;
+                    }
+                }
+                if (token !== 19) {
+                    return true;
+                }
+                token = nextToken();
+                var i = 0;
+                while (token !== 20 && token !== 1) {
+                    if (token === 9) {
+                        recordModuleName();
+                        i++;
+                    }
+                    token = nextToken();
+                }
+                return true;
+            }
+            return false;
+        }
+        function processImports() {
+            scanner.setText(sourceText);
+            nextToken();
+            while (true) {
+                if (scanner.getToken() === 1) {
+                    break;
+                }
+                if (tryConsumeDeclare() ||
+                    tryConsumeImport() ||
+                    tryConsumeExport() ||
+                    (detectJavaScriptImports && (tryConsumeRequireCall(false) || tryConsumeDefine()))) {
+                    continue;
+                }
+                else {
+                    nextToken();
+                }
+            }
+            scanner.setText(undefined);
+        }
+        if (readImportFiles) {
+            processImports();
+        }
+        processTripleSlashDirectives();
+        if (externalModule) {
+            if (ambientExternalModules) {
+                for (var _i = 0, ambientExternalModules_1 = ambientExternalModules; _i < ambientExternalModules_1.length; _i++) {
+                    var decl = ambientExternalModules_1[_i];
+                    importedFiles.push(decl.ref);
+                }
+            }
+            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: undefined };
+        }
+        else {
+            var ambientModuleNames = void 0;
+            if (ambientExternalModules) {
+                for (var _a = 0, ambientExternalModules_2 = ambientExternalModules; _a < ambientExternalModules_2.length; _a++) {
+                    var decl = ambientExternalModules_2[_a];
+                    if (decl.depth === 0) {
+                        if (!ambientModuleNames) {
+                            ambientModuleNames = [];
+                        }
+                        ambientModuleNames.push(decl.ref.fileName);
+                    }
+                    else {
+                        importedFiles.push(decl.ref);
+                    }
+                }
+            }
+            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: ambientModuleNames };
+        }
+    }
+    ts.preProcessFile = preProcessFile;
+    function getTargetLabel(referenceNode, labelName) {
+        while (referenceNode) {
+            if (referenceNode.kind === 214 && referenceNode.label.text === labelName) {
+                return referenceNode.label;
+            }
+            referenceNode = referenceNode.parent;
+        }
+        return undefined;
+    }
+    function isJumpStatementTarget(node) {
+        return node.kind === 69 &&
+            (node.parent.kind === 210 || node.parent.kind === 209) &&
+            node.parent.label === node;
+    }
+    function isLabelOfLabeledStatement(node) {
+        return node.kind === 69 &&
+            node.parent.kind === 214 &&
+            node.parent.label === node;
+    }
+    function isLabeledBy(node, labelName) {
+        for (var owner = node.parent; owner.kind === 214; owner = owner.parent) {
+            if (owner.label.text === labelName) {
+                return true;
+            }
+        }
+        return false;
+    }
+    function isLabelName(node) {
+        return isLabelOfLabeledStatement(node) || isJumpStatementTarget(node);
+    }
+    function isRightSideOfQualifiedName(node) {
+        return node.parent.kind === 139 && node.parent.right === node;
+    }
+    function isRightSideOfPropertyAccess(node) {
+        return node && node.parent && node.parent.kind === 172 && node.parent.name === node;
+    }
+    function isCallExpressionTarget(node) {
+        if (isRightSideOfPropertyAccess(node)) {
+            node = node.parent;
+        }
+        return node && node.parent && node.parent.kind === 174 && node.parent.expression === node;
+    }
+    function isNewExpressionTarget(node) {
+        if (isRightSideOfPropertyAccess(node)) {
+            node = node.parent;
+        }
+        return node && node.parent && node.parent.kind === 175 && node.parent.expression === node;
+    }
+    function isNameOfModuleDeclaration(node) {
+        return node.parent.kind === 225 && node.parent.name === node;
+    }
+    function isNameOfFunctionDeclaration(node) {
+        return node.kind === 69 &&
+            ts.isFunctionLike(node.parent) && node.parent.name === node;
+    }
+    function isObjectLiteralPropertyDeclaration(node) {
+        switch (node.kind) {
+            case 253:
+            case 254:
+            case 147:
+            case 149:
+            case 150:
+                return true;
+        }
+        return false;
+    }
+    function getContainingObjectLiteralElement(node) {
+        switch (node.kind) {
+            case 9:
+            case 8:
+                if (node.parent.kind === 140) {
+                    return isObjectLiteralPropertyDeclaration(node.parent.parent) ? node.parent.parent : undefined;
+                }
+            case 69:
+                return isObjectLiteralPropertyDeclaration(node.parent) && node.parent.name === node ? node.parent : undefined;
+        }
+        return undefined;
+    }
+    function isLiteralNameOfPropertyDeclarationOrIndexAccess(node) {
+        if (node.kind === 9 || node.kind === 8) {
+            switch (node.parent.kind) {
+                case 145:
+                case 144:
+                case 253:
+                case 255:
+                case 147:
+                case 146:
+                case 149:
+                case 150:
+                case 225:
+                    return node.parent.name === node;
+                case 173:
+                    return node.parent.argumentExpression === node;
+                case 140:
+                    return true;
+            }
+        }
+        return false;
+    }
+    function isNameOfExternalModuleImportOrDeclaration(node) {
+        if (node.kind === 9) {
+            return isNameOfModuleDeclaration(node) ||
+                (ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) && ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node);
+        }
+        return false;
+    }
+    function isInsideComment(sourceFile, token, position) {
+        return position <= token.getStart(sourceFile) &&
+            (isInsideCommentRange(ts.getTrailingCommentRanges(sourceFile.text, token.getFullStart())) ||
+                isInsideCommentRange(ts.getLeadingCommentRanges(sourceFile.text, token.getFullStart())));
+        function isInsideCommentRange(comments) {
+            return ts.forEach(comments, function (comment) {
+                if (comment.pos < position && position < comment.end) {
+                    return true;
+                }
+                else if (position === comment.end) {
+                    var text = sourceFile.text;
+                    var width = comment.end - comment.pos;
+                    if (width <= 2 || text.charCodeAt(comment.pos + 1) === 47) {
+                        return true;
+                    }
+                    else {
+                        return !(text.charCodeAt(comment.end - 1) === 47 &&
+                            text.charCodeAt(comment.end - 2) === 42);
+                    }
+                }
+                return false;
+            });
+        }
+    }
+    var keywordCompletions = [];
+    for (var i = 70; i <= 138; i++) {
+        keywordCompletions.push({
+            name: ts.tokenToString(i),
+            kind: ScriptElementKind.keyword,
+            kindModifiers: ScriptElementKindModifier.none,
+            sortText: "0"
+        });
+    }
+    function getContainerNode(node) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return undefined;
+            }
+            switch (node.kind) {
+                case 256:
+                case 147:
+                case 146:
+                case 220:
+                case 179:
+                case 149:
+                case 150:
+                case 221:
+                case 222:
+                case 224:
+                case 225:
+                    return node;
+            }
+        }
+    }
+    ts.getContainerNode = getContainerNode;
+    function getNodeKind(node) {
+        switch (node.kind) {
+            case 225: return ScriptElementKind.moduleElement;
+            case 221:
+            case 192:
+                return ScriptElementKind.classElement;
+            case 222: return ScriptElementKind.interfaceElement;
+            case 223: return ScriptElementKind.typeElement;
+            case 224: return ScriptElementKind.enumElement;
+            case 218:
+                return ts.isConst(node)
+                    ? ScriptElementKind.constElement
+                    : ts.isLet(node)
+                        ? ScriptElementKind.letElement
+                        : ScriptElementKind.variableElement;
+            case 220:
+            case 179:
+                return ScriptElementKind.functionElement;
+            case 149: return ScriptElementKind.memberGetAccessorElement;
+            case 150: return ScriptElementKind.memberSetAccessorElement;
+            case 147:
+            case 146:
+                return ScriptElementKind.memberFunctionElement;
+            case 145:
+            case 144:
+                return ScriptElementKind.memberVariableElement;
+            case 153: return ScriptElementKind.indexSignatureElement;
+            case 152: return ScriptElementKind.constructSignatureElement;
+            case 151: return ScriptElementKind.callSignatureElement;
+            case 148: return ScriptElementKind.constructorImplementationElement;
+            case 141: return ScriptElementKind.typeParameterElement;
+            case 255: return ScriptElementKind.variableElement;
+            case 142: return (node.flags & 92) ? ScriptElementKind.memberVariableElement : ScriptElementKind.parameterElement;
+            case 229:
+            case 234:
+            case 231:
+            case 238:
+            case 232:
+                return ScriptElementKind.alias;
+        }
+        return ScriptElementKind.unknown;
+    }
+    ts.getNodeKind = getNodeKind;
+    var CancellationTokenObject = (function () {
+        function CancellationTokenObject(cancellationToken) {
+            this.cancellationToken = cancellationToken;
+        }
+        CancellationTokenObject.prototype.isCancellationRequested = function () {
+            return this.cancellationToken && this.cancellationToken.isCancellationRequested();
+        };
+        CancellationTokenObject.prototype.throwIfCancellationRequested = function () {
+            if (this.isCancellationRequested()) {
+                throw new ts.OperationCanceledException();
+            }
+        };
+        return CancellationTokenObject;
+    }());
+    function createLanguageService(host, documentRegistry) {
+        if (documentRegistry === void 0) { documentRegistry = createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory()); }
+        var syntaxTreeCache = new SyntaxTreeCache(host);
+        var ruleProvider;
+        var program;
+        var lastProjectVersion;
+        var useCaseSensitivefileNames = false;
+        var cancellationToken = new CancellationTokenObject(host.getCancellationToken && host.getCancellationToken());
+        var currentDirectory = host.getCurrentDirectory();
+        if (!ts.localizedDiagnosticMessages && host.getLocalizedDiagnosticMessages) {
+            ts.localizedDiagnosticMessages = host.getLocalizedDiagnosticMessages();
+        }
+        function log(message) {
+            if (host.log) {
+                host.log(message);
+            }
+        }
+        var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitivefileNames);
+        function getValidSourceFile(fileName) {
+            var sourceFile = program.getSourceFile(fileName);
+            if (!sourceFile) {
+                throw new Error("Could not find file: '" + fileName + "'.");
+            }
+            return sourceFile;
+        }
+        function getRuleProvider(options) {
+            if (!ruleProvider) {
+                ruleProvider = new ts.formatting.RulesProvider();
+            }
+            ruleProvider.ensureUpToDate(options);
+            return ruleProvider;
+        }
+        function synchronizeHostData() {
+            if (host.getProjectVersion) {
+                var hostProjectVersion = host.getProjectVersion();
+                if (hostProjectVersion) {
+                    if (lastProjectVersion === hostProjectVersion) {
+                        return;
+                    }
+                    lastProjectVersion = hostProjectVersion;
+                }
+            }
+            var hostCache = new HostCache(host, getCanonicalFileName);
+            if (programUpToDate()) {
+                return;
+            }
+            var oldSettings = program && program.getCompilerOptions();
+            var newSettings = hostCache.compilationSettings();
+            var changesInCompilationSettingsAffectSyntax = oldSettings &&
+                (oldSettings.target !== newSettings.target ||
+                    oldSettings.module !== newSettings.module ||
+                    oldSettings.moduleResolution !== newSettings.moduleResolution ||
+                    oldSettings.noResolve !== newSettings.noResolve ||
+                    oldSettings.jsx !== newSettings.jsx ||
+                    oldSettings.allowJs !== newSettings.allowJs);
+            var compilerHost = {
+                getSourceFile: getOrCreateSourceFile,
+                getSourceFileByPath: getOrCreateSourceFileByPath,
+                getCancellationToken: function () { return cancellationToken; },
+                getCanonicalFileName: getCanonicalFileName,
+                useCaseSensitiveFileNames: function () { return useCaseSensitivefileNames; },
+                getNewLine: function () { return ts.getNewLineOrDefaultFromHost(host); },
+                getDefaultLibFileName: function (options) { return host.getDefaultLibFileName(options); },
+                writeFile: function (fileName, data, writeByteOrderMark) { },
+                getCurrentDirectory: function () { return currentDirectory; },
+                fileExists: function (fileName) {
+                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
+                    return hostCache.getOrCreateEntry(fileName) !== undefined;
+                },
+                readFile: function (fileName) {
+                    var entry = hostCache.getOrCreateEntry(fileName);
+                    return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
+                },
+                directoryExists: function (directoryName) {
+                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
+                    return ts.directoryProbablyExists(directoryName, host);
+                }
+            };
+            if (host.trace) {
+                compilerHost.trace = function (message) { return host.trace(message); };
+            }
+            if (host.resolveModuleNames) {
+                compilerHost.resolveModuleNames = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
+            }
+            if (host.resolveTypeReferenceDirectives) {
+                compilerHost.resolveTypeReferenceDirectives = function (typeReferenceDirectiveNames, containingFile) {
+                    return host.resolveTypeReferenceDirectives(typeReferenceDirectiveNames, containingFile);
+                };
+            }
+            var documentRegistryBucketKey = documentRegistry.getKeyForCompilationSettings(newSettings);
+            var newProgram = ts.createProgram(hostCache.getRootFileNames(), newSettings, compilerHost, program);
+            if (program) {
+                var oldSourceFiles = program.getSourceFiles();
+                var oldSettingsKey = documentRegistry.getKeyForCompilationSettings(oldSettings);
+                for (var _i = 0, oldSourceFiles_1 = oldSourceFiles; _i < oldSourceFiles_1.length; _i++) {
+                    var oldSourceFile = oldSourceFiles_1[_i];
+                    if (!newProgram.getSourceFile(oldSourceFile.fileName) || changesInCompilationSettingsAffectSyntax) {
+                        documentRegistry.releaseDocumentWithKey(oldSourceFile.path, oldSettingsKey);
+                    }
+                }
+            }
+            hostCache = undefined;
+            program = newProgram;
+            program.getTypeChecker();
+            return;
+            function getOrCreateSourceFile(fileName) {
+                return getOrCreateSourceFileByPath(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName));
+            }
+            function getOrCreateSourceFileByPath(fileName, path) {
+                ts.Debug.assert(hostCache !== undefined);
+                var hostFileInformation = hostCache.getOrCreateEntryByPath(fileName, path);
+                if (!hostFileInformation) {
+                    return undefined;
+                }
+                if (!changesInCompilationSettingsAffectSyntax) {
+                    var oldSourceFile = program && program.getSourceFileByPath(path);
+                    if (oldSourceFile) {
+                        ts.Debug.assert(hostFileInformation.scriptKind === oldSourceFile.scriptKind, "Registered script kind (" + oldSourceFile.scriptKind + ") should match new script kind (" + hostFileInformation.scriptKind + ") for file: " + path);
+                        return documentRegistry.updateDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
+                    }
+                }
+                return documentRegistry.acquireDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
+            }
+            function sourceFileUpToDate(sourceFile) {
+                if (!sourceFile) {
+                    return false;
+                }
+                var path = sourceFile.path || ts.toPath(sourceFile.fileName, currentDirectory, getCanonicalFileName);
+                return sourceFile.version === hostCache.getVersion(path);
+            }
+            function programUpToDate() {
+                if (!program) {
+                    return false;
+                }
+                var rootFileNames = hostCache.getRootFileNames();
+                if (program.getSourceFiles().length !== rootFileNames.length) {
+                    return false;
+                }
+                for (var _i = 0, rootFileNames_2 = rootFileNames; _i < rootFileNames_2.length; _i++) {
+                    var fileName = rootFileNames_2[_i];
+                    if (!sourceFileUpToDate(program.getSourceFile(fileName))) {
+                        return false;
+                    }
+                }
+                return ts.compareDataObjects(program.getCompilerOptions(), hostCache.compilationSettings());
+            }
+        }
+        function getProgram() {
+            synchronizeHostData();
+            return program;
+        }
+        function cleanupSemanticCache() {
+        }
+        function dispose() {
+            if (program) {
+                ts.forEach(program.getSourceFiles(), function (f) {
+                    return documentRegistry.releaseDocument(f.fileName, program.getCompilerOptions());
+                });
+            }
+        }
+        function getSyntacticDiagnostics(fileName) {
+            synchronizeHostData();
+            return program.getSyntacticDiagnostics(getValidSourceFile(fileName), cancellationToken);
+        }
+        function getSemanticDiagnostics(fileName) {
+            synchronizeHostData();
+            var targetSourceFile = getValidSourceFile(fileName);
+            var semanticDiagnostics = program.getSemanticDiagnostics(targetSourceFile, cancellationToken);
+            if (!program.getCompilerOptions().declaration) {
+                return semanticDiagnostics;
+            }
+            var declarationDiagnostics = program.getDeclarationDiagnostics(targetSourceFile, cancellationToken);
+            return ts.concatenate(semanticDiagnostics, declarationDiagnostics);
+        }
+        function getCompilerOptionsDiagnostics() {
+            synchronizeHostData();
+            return program.getOptionsDiagnostics(cancellationToken).concat(program.getGlobalDiagnostics(cancellationToken));
+        }
+        function getCompletionEntryDisplayNameForSymbol(symbol, target, performCharacterChecks, location) {
+            var displayName = ts.getDeclaredName(program.getTypeChecker(), symbol, location);
+            if (displayName) {
+                var firstCharCode = displayName.charCodeAt(0);
+                if ((symbol.flags & 1536) && (firstCharCode === 39 || firstCharCode === 34)) {
+                    return undefined;
+                }
+            }
+            return getCompletionEntryDisplayName(displayName, target, performCharacterChecks);
+        }
+        function getCompletionEntryDisplayName(name, target, performCharacterChecks) {
+            if (!name) {
+                return undefined;
+            }
+            name = ts.stripQuotes(name);
+            if (!name) {
+                return undefined;
+            }
+            if (performCharacterChecks) {
+                if (!ts.isIdentifier(name, target)) {
+                    return undefined;
+                }
+            }
+            return name;
+        }
+        function getCompletionData(fileName, position) {
+            var typeChecker = program.getTypeChecker();
+            var sourceFile = getValidSourceFile(fileName);
+            var isJavaScriptFile = ts.isSourceFileJavaScript(sourceFile);
+            var isJsDocTagName = false;
+            var start = new Date().getTime();
+            var currentToken = ts.getTokenAtPosition(sourceFile, position);
+            log("getCompletionData: Get current token: " + (new Date().getTime() - start));
+            start = new Date().getTime();
+            var insideComment = isInsideComment(sourceFile, currentToken, position);
+            log("getCompletionData: Is inside comment: " + (new Date().getTime() - start));
+            if (insideComment) {
+                if (ts.hasDocComment(sourceFile, position) && sourceFile.text.charCodeAt(position - 1) === 64) {
+                    isJsDocTagName = true;
+                }
+                var insideJsDocTagExpression = false;
+                var tag = ts.getJsDocTagAtPosition(sourceFile, position);
+                if (tag) {
+                    if (tag.tagName.pos <= position && position <= tag.tagName.end) {
+                        isJsDocTagName = true;
+                    }
+                    switch (tag.kind) {
+                        case 277:
+                        case 275:
+                        case 276:
+                            var tagWithExpression = tag;
+                            if (tagWithExpression.typeExpression) {
+                                insideJsDocTagExpression = tagWithExpression.typeExpression.pos < position && position < tagWithExpression.typeExpression.end;
+                            }
+                            break;
+                    }
+                }
+                if (isJsDocTagName) {
+                    return { symbols: undefined, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, isJsDocTagName: isJsDocTagName };
+                }
+                if (!insideJsDocTagExpression) {
+                    log("Returning an empty list because completion was inside a regular comment or plain text part of a JsDoc comment.");
+                    return undefined;
+                }
+            }
+            start = new Date().getTime();
+            var previousToken = ts.findPrecedingToken(position, sourceFile);
+            log("getCompletionData: Get previous token 1: " + (new Date().getTime() - start));
+            var contextToken = previousToken;
+            if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
+                var start_5 = new Date().getTime();
+                contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
+                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_5));
+            }
+            var node = currentToken;
+            var isRightOfDot = false;
+            var isRightOfOpenTag = false;
+            var isStartingCloseTag = false;
+            var location = ts.getTouchingPropertyName(sourceFile, position);
+            if (contextToken) {
+                if (isCompletionListBlocker(contextToken)) {
+                    log("Returning an empty list because completion was requested in an invalid position.");
+                    return undefined;
+                }
+                var parent_16 = contextToken.parent, kind = contextToken.kind;
+                if (kind === 21) {
+                    if (parent_16.kind === 172) {
+                        node = contextToken.parent.expression;
+                        isRightOfDot = true;
+                    }
+                    else if (parent_16.kind === 139) {
+                        node = contextToken.parent.left;
+                        isRightOfDot = true;
+                    }
+                    else {
+                        return undefined;
+                    }
+                }
+                else if (sourceFile.languageVariant === 1) {
+                    if (kind === 25) {
+                        isRightOfOpenTag = true;
+                        location = contextToken;
+                    }
+                    else if (kind === 39 && contextToken.parent.kind === 245) {
+                        isStartingCloseTag = true;
+                        location = contextToken;
+                    }
+                }
+            }
+            var semanticStart = new Date().getTime();
+            var isMemberCompletion;
+            var isNewIdentifierLocation;
+            var symbols = [];
+            if (isRightOfDot) {
+                getTypeScriptMemberSymbols();
+            }
+            else if (isRightOfOpenTag) {
+                var tagSymbols = typeChecker.getJsxIntrinsicTagNames();
+                if (tryGetGlobalSymbols()) {
+                    symbols = tagSymbols.concat(symbols.filter(function (s) { return !!(s.flags & (107455 | 8388608)); }));
+                }
+                else {
+                    symbols = tagSymbols;
+                }
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+            }
+            else if (isStartingCloseTag) {
+                var tagName = contextToken.parent.parent.openingElement.tagName;
+                var tagSymbol = typeChecker.getSymbolAtLocation(tagName);
+                if (!typeChecker.isUnknownSymbol(tagSymbol)) {
+                    symbols = [tagSymbol];
+                }
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+            }
+            else {
+                if (!tryGetGlobalSymbols()) {
+                    return undefined;
+                }
+            }
+            log("getCompletionData: Semantic work: " + (new Date().getTime() - semanticStart));
+            return { symbols: symbols, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, location: location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), isJsDocTagName: isJsDocTagName };
+            function getTypeScriptMemberSymbols() {
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+                if (node.kind === 69 || node.kind === 139 || node.kind === 172) {
+                    var symbol = typeChecker.getSymbolAtLocation(node);
+                    if (symbol && symbol.flags & 8388608) {
+                        symbol = typeChecker.getAliasedSymbol(symbol);
+                    }
+                    if (symbol && symbol.flags & 1952) {
+                        var exportedSymbols = typeChecker.getExportsOfModule(symbol);
+                        ts.forEach(exportedSymbols, function (symbol) {
+                            if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
+                                symbols.push(symbol);
+                            }
+                        });
+                    }
+                }
+                var type = typeChecker.getTypeAtLocation(node);
+                addTypeProperties(type);
+            }
+            function addTypeProperties(type) {
+                if (type) {
+                    for (var _i = 0, _a = type.getApparentProperties(); _i < _a.length; _i++) {
+                        var symbol = _a[_i];
+                        if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
+                            symbols.push(symbol);
+                        }
+                    }
+                    if (isJavaScriptFile && type.flags & 16384) {
+                        var unionType = type;
+                        for (var _b = 0, _c = unionType.types; _b < _c.length; _b++) {
+                            var elementType = _c[_b];
+                            addTypeProperties(elementType);
+                        }
+                    }
+                }
+            }
+            function tryGetGlobalSymbols() {
+                var objectLikeContainer;
+                var namedImportsOrExports;
+                var jsxContainer;
+                if (objectLikeContainer = tryGetObjectLikeCompletionContainer(contextToken)) {
+                    return tryGetObjectLikeCompletionSymbols(objectLikeContainer);
+                }
+                if (namedImportsOrExports = tryGetNamedImportsOrExportsForCompletion(contextToken)) {
+                    return tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports);
+                }
+                if (jsxContainer = tryGetContainingJsxElement(contextToken)) {
+                    var attrsType = void 0;
+                    if ((jsxContainer.kind === 242) || (jsxContainer.kind === 243)) {
+                        attrsType = typeChecker.getJsxElementAttributesType(jsxContainer);
+                        if (attrsType) {
+                            symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), jsxContainer.attributes);
+                            isMemberCompletion = true;
+                            isNewIdentifierLocation = false;
+                            return true;
+                        }
+                    }
+                }
+                isMemberCompletion = false;
+                isNewIdentifierLocation = isNewIdentifierDefinitionLocation(contextToken);
+                if (previousToken !== contextToken) {
+                    ts.Debug.assert(!!previousToken, "Expected 'contextToken' to be defined when different from 'previousToken'.");
+                }
+                var adjustedPosition = previousToken !== contextToken ?
+                    previousToken.getStart() :
+                    position;
+                var scopeNode = getScopeNode(contextToken, adjustedPosition, sourceFile) || sourceFile;
+                var symbolMeanings = 793056 | 107455 | 1536 | 8388608;
+                symbols = typeChecker.getSymbolsInScope(scopeNode, symbolMeanings);
+                return true;
+            }
+            function getScopeNode(initialToken, position, sourceFile) {
+                var scope = initialToken;
+                while (scope && !ts.positionBelongsToNode(scope, position, sourceFile)) {
+                    scope = scope.parent;
+                }
+                return scope;
+            }
+            function isCompletionListBlocker(contextToken) {
+                var start = new Date().getTime();
+                var result = isInStringOrRegularExpressionOrTemplateLiteral(contextToken) ||
+                    isSolelyIdentifierDefinitionLocation(contextToken) ||
+                    isDotOfNumericLiteral(contextToken) ||
+                    isInJsxText(contextToken);
+                log("getCompletionsAtPosition: isCompletionListBlocker: " + (new Date().getTime() - start));
+                return result;
+            }
+            function isInJsxText(contextToken) {
+                if (contextToken.kind === 244) {
+                    return true;
+                }
+                if (contextToken.kind === 27 && contextToken.parent) {
+                    if (contextToken.parent.kind === 243) {
+                        return true;
+                    }
+                    if (contextToken.parent.kind === 245 || contextToken.parent.kind === 242) {
+                        return contextToken.parent.parent && contextToken.parent.parent.kind === 241;
+                    }
+                }
+                return false;
+            }
+            function isNewIdentifierDefinitionLocation(previousToken) {
+                if (previousToken) {
+                    var containingNodeKind = previousToken.parent.kind;
+                    switch (previousToken.kind) {
+                        case 24:
+                            return containingNodeKind === 174
+                                || containingNodeKind === 148
+                                || containingNodeKind === 175
+                                || containingNodeKind === 170
+                                || containingNodeKind === 187
+                                || containingNodeKind === 156;
+                        case 17:
+                            return containingNodeKind === 174
+                                || containingNodeKind === 148
+                                || containingNodeKind === 175
+                                || containingNodeKind === 178
+                                || containingNodeKind === 164;
+                        case 19:
+                            return containingNodeKind === 170
+                                || containingNodeKind === 153
+                                || containingNodeKind === 140;
+                        case 125:
+                        case 126:
+                            return true;
+                        case 21:
+                            return containingNodeKind === 225;
+                        case 15:
+                            return containingNodeKind === 221;
+                        case 56:
+                            return containingNodeKind === 218
+                                || containingNodeKind === 187;
+                        case 12:
+                            return containingNodeKind === 189;
+                        case 13:
+                            return containingNodeKind === 197;
+                        case 112:
+                        case 110:
+                        case 111:
+                            return containingNodeKind === 145;
+                    }
+                    switch (previousToken.getText()) {
+                        case "public":
+                        case "protected":
+                        case "private":
+                            return true;
+                    }
+                }
+                return false;
+            }
+            function isInStringOrRegularExpressionOrTemplateLiteral(contextToken) {
+                if (contextToken.kind === 9
+                    || contextToken.kind === 166
+                    || contextToken.kind === 10
+                    || ts.isTemplateLiteralKind(contextToken.kind)) {
+                    var start_6 = contextToken.getStart();
+                    var end = contextToken.getEnd();
+                    if (start_6 < position && position < end) {
+                        return true;
+                    }
+                    if (position === end) {
+                        return !!contextToken.isUnterminated
+                            || contextToken.kind === 10;
+                    }
+                }
+                return false;
+            }
+            function tryGetObjectLikeCompletionSymbols(objectLikeContainer) {
+                isMemberCompletion = true;
+                var typeForObject;
+                var existingMembers;
+                if (objectLikeContainer.kind === 171) {
+                    isNewIdentifierLocation = true;
+                    typeForObject = typeChecker.getContextualType(objectLikeContainer);
+                    existingMembers = objectLikeContainer.properties;
+                }
+                else if (objectLikeContainer.kind === 167) {
+                    isNewIdentifierLocation = false;
+                    var rootDeclaration = ts.getRootDeclaration(objectLikeContainer.parent);
+                    if (ts.isVariableLike(rootDeclaration)) {
+                        var canGetType = !!(rootDeclaration.initializer || rootDeclaration.type);
+                        if (!canGetType && rootDeclaration.kind === 142) {
+                            if (ts.isExpression(rootDeclaration.parent)) {
+                                canGetType = !!typeChecker.getContextualType(rootDeclaration.parent);
+                            }
+                            else if (rootDeclaration.parent.kind === 147 || rootDeclaration.parent.kind === 150) {
+                                canGetType = ts.isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(rootDeclaration.parent.parent);
+                            }
+                        }
+                        if (canGetType) {
+                            typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
+                            existingMembers = objectLikeContainer.elements;
+                        }
+                    }
+                    else {
+                        ts.Debug.fail("Root declaration is not variable-like.");
+                    }
+                }
+                else {
+                    ts.Debug.fail("Expected object literal or binding pattern, got " + objectLikeContainer.kind);
+                }
+                if (!typeForObject) {
+                    return false;
+                }
+                var typeMembers = typeChecker.getPropertiesOfType(typeForObject);
+                if (typeMembers && typeMembers.length > 0) {
+                    symbols = filterObjectMembersList(typeMembers, existingMembers);
+                }
+                return true;
+            }
+            function tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports) {
+                var declarationKind = namedImportsOrExports.kind === 233 ?
+                    230 :
+                    236;
+                var importOrExportDeclaration = ts.getAncestor(namedImportsOrExports, declarationKind);
+                var moduleSpecifier = importOrExportDeclaration.moduleSpecifier;
+                if (!moduleSpecifier) {
+                    return false;
+                }
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+                var exports;
+                var moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(importOrExportDeclaration.moduleSpecifier);
+                if (moduleSpecifierSymbol) {
+                    exports = typeChecker.getExportsOfModule(moduleSpecifierSymbol);
+                }
+                symbols = exports ? filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements) : emptyArray;
+                return true;
+            }
+            function tryGetObjectLikeCompletionContainer(contextToken) {
+                if (contextToken) {
+                    switch (contextToken.kind) {
+                        case 15:
+                        case 24:
+                            var parent_17 = contextToken.parent;
+                            if (parent_17 && (parent_17.kind === 171 || parent_17.kind === 167)) {
+                                return parent_17;
+                            }
+                            break;
+                    }
+                }
+                return undefined;
+            }
+            function tryGetNamedImportsOrExportsForCompletion(contextToken) {
+                if (contextToken) {
+                    switch (contextToken.kind) {
+                        case 15:
+                        case 24:
+                            switch (contextToken.parent.kind) {
+                                case 233:
+                                case 237:
+                                    return contextToken.parent;
+                            }
+                    }
+                }
+                return undefined;
+            }
+            function tryGetContainingJsxElement(contextToken) {
+                if (contextToken) {
+                    var parent_18 = contextToken.parent;
+                    switch (contextToken.kind) {
+                        case 26:
+                        case 39:
+                        case 69:
+                        case 246:
+                        case 247:
+                            if (parent_18 && (parent_18.kind === 242 || parent_18.kind === 243)) {
+                                return parent_18;
+                            }
+                            else if (parent_18.kind === 246) {
+                                return parent_18.parent;
+                            }
+                            break;
+                        case 9:
+                            if (parent_18 && ((parent_18.kind === 246) || (parent_18.kind === 247))) {
+                                return parent_18.parent;
+                            }
+                            break;
+                        case 16:
+                            if (parent_18 &&
+                                parent_18.kind === 248 &&
+                                parent_18.parent &&
+                                (parent_18.parent.kind === 246)) {
+                                return parent_18.parent.parent;
+                            }
+                            if (parent_18 && parent_18.kind === 247) {
+                                return parent_18.parent;
+                            }
+                            break;
+                    }
+                }
+                return undefined;
+            }
+            function isFunction(kind) {
+                switch (kind) {
+                    case 179:
+                    case 180:
+                    case 220:
+                    case 147:
+                    case 146:
+                    case 149:
+                    case 150:
+                    case 151:
+                    case 152:
+                    case 153:
+                        return true;
+                }
+                return false;
+            }
+            function isSolelyIdentifierDefinitionLocation(contextToken) {
+                var containingNodeKind = contextToken.parent.kind;
+                switch (contextToken.kind) {
+                    case 24:
+                        return containingNodeKind === 218 ||
+                            containingNodeKind === 219 ||
+                            containingNodeKind === 200 ||
+                            containingNodeKind === 224 ||
+                            isFunction(containingNodeKind) ||
+                            containingNodeKind === 221 ||
+                            containingNodeKind === 192 ||
+                            containingNodeKind === 222 ||
+                            containingNodeKind === 168 ||
+                            containingNodeKind === 223;
+                    case 21:
+                        return containingNodeKind === 168;
+                    case 54:
+                        return containingNodeKind === 169;
+                    case 19:
+                        return containingNodeKind === 168;
+                    case 17:
+                        return containingNodeKind === 252 ||
+                            isFunction(containingNodeKind);
+                    case 15:
+                        return containingNodeKind === 224 ||
+                            containingNodeKind === 222 ||
+                            containingNodeKind === 159;
+                    case 23:
+                        return containingNodeKind === 144 &&
+                            contextToken.parent && contextToken.parent.parent &&
+                            (contextToken.parent.parent.kind === 222 ||
+                                contextToken.parent.parent.kind === 159);
+                    case 25:
+                        return containingNodeKind === 221 ||
+                            containingNodeKind === 192 ||
+                            containingNodeKind === 222 ||
+                            containingNodeKind === 223 ||
+                            isFunction(containingNodeKind);
+                    case 113:
+                        return containingNodeKind === 145;
+                    case 22:
+                        return containingNodeKind === 142 ||
+                            (contextToken.parent && contextToken.parent.parent &&
+                                contextToken.parent.parent.kind === 168);
+                    case 112:
+                    case 110:
+                    case 111:
+                        return containingNodeKind === 142;
+                    case 116:
+                        return containingNodeKind === 234 ||
+                            containingNodeKind === 238 ||
+                            containingNodeKind === 232;
+                    case 73:
+                    case 81:
+                    case 107:
+                    case 87:
+                    case 102:
+                    case 123:
+                    case 131:
+                    case 89:
+                    case 108:
+                    case 74:
+                    case 114:
+                    case 134:
+                        return true;
+                }
+                switch (contextToken.getText()) {
+                    case "abstract":
+                    case "async":
+                    case "class":
+                    case "const":
+                    case "declare":
+                    case "enum":
+                    case "function":
+                    case "interface":
+                    case "let":
+                    case "private":
+                    case "protected":
+                    case "public":
+                    case "static":
+                    case "var":
+                    case "yield":
+                        return true;
+                }
+                return false;
+            }
+            function isDotOfNumericLiteral(contextToken) {
+                if (contextToken.kind === 8) {
+                    var text = contextToken.getFullText();
+                    return text.charAt(text.length - 1) === ".";
+                }
+                return false;
+            }
+            function filterNamedImportOrExportCompletionItems(exportsOfModule, namedImportsOrExports) {
+                var existingImportsOrExports = {};
+                for (var _i = 0, namedImportsOrExports_1 = namedImportsOrExports; _i < namedImportsOrExports_1.length; _i++) {
+                    var element = namedImportsOrExports_1[_i];
+                    if (element.getStart() <= position && position <= element.getEnd()) {
+                        continue;
+                    }
+                    var name_40 = element.propertyName || element.name;
+                    existingImportsOrExports[name_40.text] = true;
+                }
+                if (ts.isEmpty(existingImportsOrExports)) {
+                    return ts.filter(exportsOfModule, function (e) { return e.name !== "default"; });
+                }
+                return ts.filter(exportsOfModule, function (e) { return e.name !== "default" && !ts.lookUp(existingImportsOrExports, e.name); });
+            }
+            function filterObjectMembersList(contextualMemberSymbols, existingMembers) {
+                if (!existingMembers || existingMembers.length === 0) {
+                    return contextualMemberSymbols;
+                }
+                var existingMemberNames = {};
+                for (var _i = 0, existingMembers_1 = existingMembers; _i < existingMembers_1.length; _i++) {
+                    var m = existingMembers_1[_i];
+                    if (m.kind !== 253 &&
+                        m.kind !== 254 &&
+                        m.kind !== 169 &&
+                        m.kind !== 147) {
+                        continue;
+                    }
+                    if (m.getStart() <= position && position <= m.getEnd()) {
+                        continue;
+                    }
+                    var existingName = void 0;
+                    if (m.kind === 169 && m.propertyName) {
+                        if (m.propertyName.kind === 69) {
+                            existingName = m.propertyName.text;
+                        }
+                    }
+                    else {
+                        existingName = m.name.text;
+                    }
+                    existingMemberNames[existingName] = true;
+                }
+                return ts.filter(contextualMemberSymbols, function (m) { return !ts.lookUp(existingMemberNames, m.name); });
+            }
+            function filterJsxAttributes(symbols, attributes) {
+                var seenNames = {};
+                for (var _i = 0, attributes_1 = attributes; _i < attributes_1.length; _i++) {
+                    var attr = attributes_1[_i];
+                    if (attr.getStart() <= position && position <= attr.getEnd()) {
+                        continue;
+                    }
+                    if (attr.kind === 246) {
+                        seenNames[attr.name.text] = true;
+                    }
+                }
+                return ts.filter(symbols, function (a) { return !ts.lookUp(seenNames, a.name); });
+            }
+        }
+        function getCompletionsAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            if (ts.isInString(sourceFile, position)) {
+                return getStringLiteralCompletionEntries(sourceFile, position);
+            }
+            var completionData = getCompletionData(fileName, position);
+            if (!completionData) {
+                return undefined;
+            }
+            var symbols = completionData.symbols, isMemberCompletion = completionData.isMemberCompletion, isNewIdentifierLocation = completionData.isNewIdentifierLocation, location = completionData.location, isJsDocTagName = completionData.isJsDocTagName;
+            if (isJsDocTagName) {
+                return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: getAllJsDocCompletionEntries() };
+            }
+            var entries = [];
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                var uniqueNames = getCompletionEntriesFromSymbols(symbols, entries, location, false);
+                ts.addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames));
+            }
+            else {
+                if (!symbols || symbols.length === 0) {
+                    if (sourceFile.languageVariant === 1 &&
+                        location.parent && location.parent.kind === 245) {
+                        var tagName = location.parent.parent.openingElement.tagName;
+                        entries.push({
+                            name: tagName.text,
+                            kind: undefined,
+                            kindModifiers: undefined,
+                            sortText: "0"
+                        });
+                    }
+                    else {
+                        return undefined;
+                    }
+                }
+                getCompletionEntriesFromSymbols(symbols, entries, location, true);
+            }
+            if (!isMemberCompletion && !isJsDocTagName) {
+                ts.addRange(entries, keywordCompletions);
+            }
+            return { isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries: entries };
+            function getJavaScriptCompletionEntries(sourceFile, position, uniqueNames) {
+                var entries = [];
+                var target = program.getCompilerOptions().target;
+                var nameTable = getNameTable(sourceFile);
+                for (var name_41 in nameTable) {
+                    if (nameTable[name_41] === position) {
+                        continue;
+                    }
+                    if (!uniqueNames[name_41]) {
+                        uniqueNames[name_41] = name_41;
+                        var displayName = getCompletionEntryDisplayName(name_41, target, true);
+                        if (displayName) {
+                            var entry = {
+                                name: displayName,
+                                kind: ScriptElementKind.warning,
+                                kindModifiers: "",
+                                sortText: "1"
+                            };
+                            entries.push(entry);
+                        }
+                    }
+                }
+                return entries;
+            }
+            function getAllJsDocCompletionEntries() {
+                return jsDocCompletionEntries || (jsDocCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
+                    return {
+                        name: tagName,
+                        kind: ScriptElementKind.keyword,
+                        kindModifiers: "",
+                        sortText: "0"
+                    };
+                }));
+            }
+            function createCompletionEntry(symbol, location, performCharacterChecks) {
+                var displayName = getCompletionEntryDisplayNameForSymbol(symbol, program.getCompilerOptions().target, performCharacterChecks, location);
+                if (!displayName) {
+                    return undefined;
+                }
+                return {
+                    name: displayName,
+                    kind: getSymbolKind(symbol, location),
+                    kindModifiers: getSymbolModifiers(symbol),
+                    sortText: "0"
+                };
+            }
+            function getCompletionEntriesFromSymbols(symbols, entries, location, performCharacterChecks) {
+                var start = new Date().getTime();
+                var uniqueNames = {};
+                if (symbols) {
+                    for (var _i = 0, symbols_4 = symbols; _i < symbols_4.length; _i++) {
+                        var symbol = symbols_4[_i];
+                        var entry = createCompletionEntry(symbol, location, performCharacterChecks);
+                        if (entry) {
+                            var id = ts.escapeIdentifier(entry.name);
+                            if (!ts.lookUp(uniqueNames, id)) {
+                                entries.push(entry);
+                                uniqueNames[id] = id;
+                            }
+                        }
+                    }
+                }
+                log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (new Date().getTime() - start));
+                return uniqueNames;
+            }
+            function getStringLiteralCompletionEntries(sourceFile, position) {
+                var node = ts.findPrecedingToken(position, sourceFile);
+                if (!node || node.kind !== 9) {
+                    return undefined;
+                }
+                var argumentInfo = ts.SignatureHelp.getContainingArgumentInfo(node, position, sourceFile);
+                if (argumentInfo) {
+                    return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo);
+                }
+                else if (ts.isElementAccessExpression(node.parent) && node.parent.argumentExpression === node) {
+                    return getStringLiteralCompletionEntriesFromElementAccess(node.parent);
+                }
+                else {
+                    return getStringLiteralCompletionEntriesFromContextualType(node);
+                }
+            }
+            function getStringLiteralCompletionEntriesFromCallExpression(argumentInfo) {
+                var typeChecker = program.getTypeChecker();
+                var candidates = [];
+                var entries = [];
+                typeChecker.getResolvedSignature(argumentInfo.invocation, candidates);
+                for (var _i = 0, candidates_3 = candidates; _i < candidates_3.length; _i++) {
+                    var candidate = candidates_3[_i];
+                    if (candidate.parameters.length > argumentInfo.argumentIndex) {
+                        var parameter = candidate.parameters[argumentInfo.argumentIndex];
+                        addStringLiteralCompletionsFromType(typeChecker.getTypeAtLocation(parameter.valueDeclaration), entries);
+                    }
+                }
+                if (entries.length) {
+                    return { isMemberCompletion: false, isNewIdentifierLocation: true, entries: entries };
+                }
+                return undefined;
+            }
+            function getStringLiteralCompletionEntriesFromElementAccess(node) {
+                var typeChecker = program.getTypeChecker();
+                var type = typeChecker.getTypeAtLocation(node.expression);
+                var entries = [];
+                if (type) {
+                    getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, node, false);
+                    if (entries.length) {
+                        return { isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
+                    }
+                }
+                return undefined;
+            }
+            function getStringLiteralCompletionEntriesFromContextualType(node) {
+                var typeChecker = program.getTypeChecker();
+                var type = typeChecker.getContextualType(node);
+                if (type) {
+                    var entries_1 = [];
+                    addStringLiteralCompletionsFromType(type, entries_1);
+                    if (entries_1.length) {
+                        return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: entries_1 };
+                    }
+                }
+                return undefined;
+            }
+            function addStringLiteralCompletionsFromType(type, result) {
+                if (!type) {
+                    return;
+                }
+                if (type.flags & 16384) {
+                    ts.forEach(type.types, function (t) { return addStringLiteralCompletionsFromType(t, result); });
+                }
+                else {
+                    if (type.flags & 256) {
+                        result.push({
+                            name: type.text,
+                            kindModifiers: ScriptElementKindModifier.none,
+                            kind: ScriptElementKind.variableElement,
+                            sortText: "0"
+                        });
+                    }
+                }
+            }
+        }
+        function getCompletionEntryDetails(fileName, position, entryName) {
+            synchronizeHostData();
+            var completionData = getCompletionData(fileName, position);
+            if (completionData) {
+                var symbols = completionData.symbols, location_2 = completionData.location;
+                var target_2 = program.getCompilerOptions().target;
+                var symbol = ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(s, target_2, false, location_2) === entryName ? s : undefined; });
+                if (symbol) {
+                    var _a = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, getValidSourceFile(fileName), location_2, location_2, 7), displayParts = _a.displayParts, documentation = _a.documentation, symbolKind = _a.symbolKind;
+                    return {
+                        name: entryName,
+                        kindModifiers: getSymbolModifiers(symbol),
+                        kind: symbolKind,
+                        displayParts: displayParts,
+                        documentation: documentation
+                    };
+                }
+            }
+            var keywordCompletion = ts.forEach(keywordCompletions, function (c) { return c.name === entryName; });
+            if (keywordCompletion) {
+                return {
+                    name: entryName,
+                    kind: ScriptElementKind.keyword,
+                    kindModifiers: ScriptElementKindModifier.none,
+                    displayParts: [ts.displayPart(entryName, SymbolDisplayPartKind.keyword)],
+                    documentation: undefined
+                };
+            }
+            return undefined;
+        }
+        function getSymbolKind(symbol, location) {
+            var flags = symbol.getFlags();
+            if (flags & 32)
+                return ts.getDeclarationOfKind(symbol, 192) ?
+                    ScriptElementKind.localClassElement : ScriptElementKind.classElement;
+            if (flags & 384)
+                return ScriptElementKind.enumElement;
+            if (flags & 524288)
+                return ScriptElementKind.typeElement;
+            if (flags & 64)
+                return ScriptElementKind.interfaceElement;
+            if (flags & 262144)
+                return ScriptElementKind.typeParameterElement;
+            var result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location);
+            if (result === ScriptElementKind.unknown) {
+                if (flags & 262144)
+                    return ScriptElementKind.typeParameterElement;
+                if (flags & 8)
+                    return ScriptElementKind.variableElement;
+                if (flags & 8388608)
+                    return ScriptElementKind.alias;
+                if (flags & 1536)
+                    return ScriptElementKind.moduleElement;
+            }
+            return result;
+        }
+        function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location) {
+            var typeChecker = program.getTypeChecker();
+            if (typeChecker.isUndefinedSymbol(symbol)) {
+                return ScriptElementKind.variableElement;
+            }
+            if (typeChecker.isArgumentsSymbol(symbol)) {
+                return ScriptElementKind.localVariableElement;
+            }
+            if (location.kind === 97 && ts.isExpression(location)) {
+                return ScriptElementKind.parameterElement;
+            }
+            if (flags & 3) {
+                if (ts.isFirstDeclarationOfSymbolParameter(symbol)) {
+                    return ScriptElementKind.parameterElement;
+                }
+                else if (symbol.valueDeclaration && ts.isConst(symbol.valueDeclaration)) {
+                    return ScriptElementKind.constElement;
+                }
+                else if (ts.forEach(symbol.declarations, ts.isLet)) {
+                    return ScriptElementKind.letElement;
+                }
+                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localVariableElement : ScriptElementKind.variableElement;
+            }
+            if (flags & 16)
+                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localFunctionElement : ScriptElementKind.functionElement;
+            if (flags & 32768)
+                return ScriptElementKind.memberGetAccessorElement;
+            if (flags & 65536)
+                return ScriptElementKind.memberSetAccessorElement;
+            if (flags & 8192)
+                return ScriptElementKind.memberFunctionElement;
+            if (flags & 16384)
+                return ScriptElementKind.constructorImplementationElement;
+            if (flags & 4) {
+                if (flags & 268435456) {
+                    var unionPropertyKind = ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
+                        var rootSymbolFlags = rootSymbol.getFlags();
+                        if (rootSymbolFlags & (98308 | 3)) {
+                            return ScriptElementKind.memberVariableElement;
+                        }
+                        ts.Debug.assert(!!(rootSymbolFlags & 8192));
+                    });
+                    if (!unionPropertyKind) {
+                        var typeOfUnionProperty = typeChecker.getTypeOfSymbolAtLocation(symbol, location);
+                        if (typeOfUnionProperty.getCallSignatures().length) {
+                            return ScriptElementKind.memberFunctionElement;
+                        }
+                        return ScriptElementKind.memberVariableElement;
+                    }
+                    return unionPropertyKind;
+                }
+                return ScriptElementKind.memberVariableElement;
+            }
+            return ScriptElementKind.unknown;
+        }
+        function getSymbolModifiers(symbol) {
+            return symbol && symbol.declarations && symbol.declarations.length > 0
+                ? ts.getNodeModifiers(symbol.declarations[0])
+                : ScriptElementKindModifier.none;
+        }
+        function getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, enclosingDeclaration, location, semanticMeaning) {
+            if (semanticMeaning === void 0) { semanticMeaning = getMeaningFromLocation(location); }
+            var typeChecker = program.getTypeChecker();
+            var displayParts = [];
+            var documentation;
+            var symbolFlags = symbol.flags;
+            var symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, symbolFlags, location);
+            var hasAddedSymbolInfo;
+            var isThisExpression = location.kind === 97 && ts.isExpression(location);
+            var type;
+            if (symbolKind !== ScriptElementKind.unknown || symbolFlags & 32 || symbolFlags & 8388608) {
+                if (symbolKind === ScriptElementKind.memberGetAccessorElement || symbolKind === ScriptElementKind.memberSetAccessorElement) {
+                    symbolKind = ScriptElementKind.memberVariableElement;
+                }
+                var signature = void 0;
+                type = isThisExpression ? typeChecker.getTypeAtLocation(location) : typeChecker.getTypeOfSymbolAtLocation(symbol, location);
+                if (type) {
+                    if (location.parent && location.parent.kind === 172) {
+                        var right = location.parent.name;
+                        if (right === location || (right && right.getFullWidth() === 0)) {
+                            location = location.parent;
+                        }
+                    }
+                    var callExpression = void 0;
+                    if (location.kind === 174 || location.kind === 175) {
+                        callExpression = location;
+                    }
+                    else if (isCallExpressionTarget(location) || isNewExpressionTarget(location)) {
+                        callExpression = location.parent;
+                    }
+                    if (callExpression) {
+                        var candidateSignatures = [];
+                        signature = typeChecker.getResolvedSignature(callExpression, candidateSignatures);
+                        if (!signature && candidateSignatures.length) {
+                            signature = candidateSignatures[0];
+                        }
+                        var useConstructSignatures = callExpression.kind === 175 || callExpression.expression.kind === 95;
+                        var allSignatures = useConstructSignatures ? type.getConstructSignatures() : type.getCallSignatures();
+                        if (!ts.contains(allSignatures, signature.target) && !ts.contains(allSignatures, signature)) {
+                            signature = allSignatures.length ? allSignatures[0] : undefined;
+                        }
+                        if (signature) {
+                            if (useConstructSignatures && (symbolFlags & 32)) {
+                                symbolKind = ScriptElementKind.constructorImplementationElement;
+                                addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
+                            }
+                            else if (symbolFlags & 8388608) {
+                                symbolKind = ScriptElementKind.alias;
+                                pushTypePart(symbolKind);
+                                displayParts.push(ts.spacePart());
+                                if (useConstructSignatures) {
+                                    displayParts.push(ts.keywordPart(92));
+                                    displayParts.push(ts.spacePart());
+                                }
+                                addFullSymbolName(symbol);
+                            }
+                            else {
+                                addPrefixForAnyFunctionOrVar(symbol, symbolKind);
+                            }
+                            switch (symbolKind) {
+                                case ScriptElementKind.memberVariableElement:
+                                case ScriptElementKind.variableElement:
+                                case ScriptElementKind.constElement:
+                                case ScriptElementKind.letElement:
+                                case ScriptElementKind.parameterElement:
+                                case ScriptElementKind.localVariableElement:
+                                    displayParts.push(ts.punctuationPart(54));
+                                    displayParts.push(ts.spacePart());
+                                    if (useConstructSignatures) {
+                                        displayParts.push(ts.keywordPart(92));
+                                        displayParts.push(ts.spacePart());
+                                    }
+                                    if (!(type.flags & 65536) && type.symbol) {
+                                        ts.addRange(displayParts, ts.symbolToDisplayParts(typeChecker, type.symbol, enclosingDeclaration, undefined, 1));
+                                    }
+                                    addSignatureDisplayParts(signature, allSignatures, 8);
+                                    break;
+                                default:
+                                    addSignatureDisplayParts(signature, allSignatures);
+                            }
+                            hasAddedSymbolInfo = true;
+                        }
+                    }
+                    else if ((isNameOfFunctionDeclaration(location) && !(symbol.flags & 98304)) ||
+                        (location.kind === 121 && location.parent.kind === 148)) {
+                        var functionDeclaration = location.parent;
+                        var allSignatures = functionDeclaration.kind === 148 ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
+                        if (!typeChecker.isImplementationOfOverload(functionDeclaration)) {
+                            signature = typeChecker.getSignatureFromDeclaration(functionDeclaration);
+                        }
+                        else {
+                            signature = allSignatures[0];
+                        }
+                        if (functionDeclaration.kind === 148) {
+                            symbolKind = ScriptElementKind.constructorImplementationElement;
+                            addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
+                        }
+                        else {
+                            addPrefixForAnyFunctionOrVar(functionDeclaration.kind === 151 &&
+                                !(type.symbol.flags & 2048 || type.symbol.flags & 4096) ? type.symbol : symbol, symbolKind);
+                        }
+                        addSignatureDisplayParts(signature, allSignatures);
+                        hasAddedSymbolInfo = true;
+                    }
+                }
+            }
+            if (symbolFlags & 32 && !hasAddedSymbolInfo && !isThisExpression) {
+                if (ts.getDeclarationOfKind(symbol, 192)) {
+                    pushTypePart(ScriptElementKind.localClassElement);
+                }
+                else {
+                    displayParts.push(ts.keywordPart(73));
+                }
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                writeTypeParametersOfSymbol(symbol, sourceFile);
+            }
+            if ((symbolFlags & 64) && (semanticMeaning & 2)) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.keywordPart(107));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                writeTypeParametersOfSymbol(symbol, sourceFile);
+            }
+            if (symbolFlags & 524288) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.keywordPart(134));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                writeTypeParametersOfSymbol(symbol, sourceFile);
+                displayParts.push(ts.spacePart());
+                displayParts.push(ts.operatorPart(56));
+                displayParts.push(ts.spacePart());
+                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, typeChecker.getDeclaredTypeOfSymbol(symbol), enclosingDeclaration));
+            }
+            if (symbolFlags & 384) {
+                addNewLineIfDisplayPartsExist();
+                if (ts.forEach(symbol.declarations, ts.isConstEnumDeclaration)) {
+                    displayParts.push(ts.keywordPart(74));
+                    displayParts.push(ts.spacePart());
+                }
+                displayParts.push(ts.keywordPart(81));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+            }
+            if (symbolFlags & 1536) {
+                addNewLineIfDisplayPartsExist();
+                var declaration = ts.getDeclarationOfKind(symbol, 225);
+                var isNamespace = declaration && declaration.name && declaration.name.kind === 69;
+                displayParts.push(ts.keywordPart(isNamespace ? 126 : 125));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+            }
+            if ((symbolFlags & 262144) && (semanticMeaning & 2)) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.punctuationPart(17));
+                displayParts.push(ts.textPart("type parameter"));
+                displayParts.push(ts.punctuationPart(18));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                displayParts.push(ts.spacePart());
+                displayParts.push(ts.keywordPart(90));
+                displayParts.push(ts.spacePart());
+                if (symbol.parent) {
+                    addFullSymbolName(symbol.parent, enclosingDeclaration);
+                    writeTypeParametersOfSymbol(symbol.parent, enclosingDeclaration);
+                }
+                else {
+                    var declaration = ts.getDeclarationOfKind(symbol, 141);
+                    ts.Debug.assert(declaration !== undefined);
+                    declaration = declaration.parent;
+                    if (declaration) {
+                        if (ts.isFunctionLikeKind(declaration.kind)) {
+                            var signature = typeChecker.getSignatureFromDeclaration(declaration);
+                            if (declaration.kind === 152) {
+                                displayParts.push(ts.keywordPart(92));
+                                displayParts.push(ts.spacePart());
+                            }
+                            else if (declaration.kind !== 151 && declaration.name) {
+                                addFullSymbolName(declaration.symbol);
+                            }
+                            ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, sourceFile, 32));
+                        }
+                        else {
+                            displayParts.push(ts.keywordPart(134));
+                            displayParts.push(ts.spacePart());
+                            addFullSymbolName(declaration.symbol);
+                            writeTypeParametersOfSymbol(declaration.symbol, sourceFile);
+                        }
+                    }
+                }
+            }
+            if (symbolFlags & 8) {
+                addPrefixForAnyFunctionOrVar(symbol, "enum member");
+                var declaration = symbol.declarations[0];
+                if (declaration.kind === 255) {
+                    var constantValue = typeChecker.getConstantValue(declaration);
+                    if (constantValue !== undefined) {
+                        displayParts.push(ts.spacePart());
+                        displayParts.push(ts.operatorPart(56));
+                        displayParts.push(ts.spacePart());
+                        displayParts.push(ts.displayPart(constantValue.toString(), SymbolDisplayPartKind.numericLiteral));
+                    }
+                }
+            }
+            if (symbolFlags & 8388608) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.keywordPart(89));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                ts.forEach(symbol.declarations, function (declaration) {
+                    if (declaration.kind === 229) {
+                        var importEqualsDeclaration = declaration;
+                        if (ts.isExternalModuleImportEqualsDeclaration(importEqualsDeclaration)) {
+                            displayParts.push(ts.spacePart());
+                            displayParts.push(ts.operatorPart(56));
+                            displayParts.push(ts.spacePart());
+                            displayParts.push(ts.keywordPart(129));
+                            displayParts.push(ts.punctuationPart(17));
+                            displayParts.push(ts.displayPart(ts.getTextOfNode(ts.getExternalModuleImportEqualsDeclarationExpression(importEqualsDeclaration)), SymbolDisplayPartKind.stringLiteral));
+                            displayParts.push(ts.punctuationPart(18));
+                        }
+                        else {
+                            var internalAliasSymbol = typeChecker.getSymbolAtLocation(importEqualsDeclaration.moduleReference);
+                            if (internalAliasSymbol) {
+                                displayParts.push(ts.spacePart());
+                                displayParts.push(ts.operatorPart(56));
+                                displayParts.push(ts.spacePart());
+                                addFullSymbolName(internalAliasSymbol, enclosingDeclaration);
+                            }
+                        }
+                        return true;
+                    }
+                });
+            }
+            if (!hasAddedSymbolInfo) {
+                if (symbolKind !== ScriptElementKind.unknown) {
+                    if (type) {
+                        if (isThisExpression) {
+                            addNewLineIfDisplayPartsExist();
+                            displayParts.push(ts.keywordPart(97));
+                        }
+                        else {
+                            addPrefixForAnyFunctionOrVar(symbol, symbolKind);
+                        }
+                        if (symbolKind === ScriptElementKind.memberVariableElement ||
+                            symbolFlags & 3 ||
+                            symbolKind === ScriptElementKind.localVariableElement ||
+                            isThisExpression) {
+                            displayParts.push(ts.punctuationPart(54));
+                            displayParts.push(ts.spacePart());
+                            if (type.symbol && type.symbol.flags & 262144) {
+                                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
+                                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(type, writer, enclosingDeclaration);
+                                });
+                                ts.addRange(displayParts, typeParameterParts);
+                            }
+                            else {
+                                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, type, enclosingDeclaration));
+                            }
+                        }
+                        else if (symbolFlags & 16 ||
+                            symbolFlags & 8192 ||
+                            symbolFlags & 16384 ||
+                            symbolFlags & 131072 ||
+                            symbolFlags & 98304 ||
+                            symbolKind === ScriptElementKind.memberFunctionElement) {
+                            var allSignatures = type.getNonNullableType().getCallSignatures();
+                            addSignatureDisplayParts(allSignatures[0], allSignatures);
+                        }
+                    }
+                }
+                else {
+                    symbolKind = getSymbolKind(symbol, location);
+                }
+            }
+            if (!documentation) {
+                documentation = symbol.getDocumentationComment();
+            }
+            return { displayParts: displayParts, documentation: documentation, symbolKind: symbolKind };
+            function addNewLineIfDisplayPartsExist() {
+                if (displayParts.length) {
+                    displayParts.push(ts.lineBreakPart());
+                }
+            }
+            function addFullSymbolName(symbol, enclosingDeclaration) {
+                var fullSymbolDisplayParts = ts.symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration || sourceFile, undefined, 1 | 2);
+                ts.addRange(displayParts, fullSymbolDisplayParts);
+            }
+            function addPrefixForAnyFunctionOrVar(symbol, symbolKind) {
+                addNewLineIfDisplayPartsExist();
+                if (symbolKind) {
+                    pushTypePart(symbolKind);
+                    displayParts.push(ts.spacePart());
+                    addFullSymbolName(symbol);
+                }
+            }
+            function pushTypePart(symbolKind) {
+                switch (symbolKind) {
+                    case ScriptElementKind.variableElement:
+                    case ScriptElementKind.functionElement:
+                    case ScriptElementKind.letElement:
+                    case ScriptElementKind.constElement:
+                    case ScriptElementKind.constructorImplementationElement:
+                        displayParts.push(ts.textOrKeywordPart(symbolKind));
+                        return;
+                    default:
+                        displayParts.push(ts.punctuationPart(17));
+                        displayParts.push(ts.textOrKeywordPart(symbolKind));
+                        displayParts.push(ts.punctuationPart(18));
+                        return;
+                }
+            }
+            function addSignatureDisplayParts(signature, allSignatures, flags) {
+                ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, enclosingDeclaration, flags | 32));
+                if (allSignatures.length > 1) {
+                    displayParts.push(ts.spacePart());
+                    displayParts.push(ts.punctuationPart(17));
+                    displayParts.push(ts.operatorPart(35));
+                    displayParts.push(ts.displayPart((allSignatures.length - 1).toString(), SymbolDisplayPartKind.numericLiteral));
+                    displayParts.push(ts.spacePart());
+                    displayParts.push(ts.textPart(allSignatures.length === 2 ? "overload" : "overloads"));
+                    displayParts.push(ts.punctuationPart(18));
+                }
+                documentation = signature.getDocumentationComment();
+            }
+            function writeTypeParametersOfSymbol(symbol, enclosingDeclaration) {
+                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
+                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration);
+                });
+                ts.addRange(displayParts, typeParameterParts);
+            }
+        }
+        function getQuickInfoAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, position);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            if (isLabelName(node)) {
+                return undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol || typeChecker.isUnknownSymbol(symbol)) {
+                switch (node.kind) {
+                    case 69:
+                    case 172:
+                    case 139:
+                    case 97:
+                    case 165:
+                    case 95:
+                        var type = typeChecker.getTypeAtLocation(node);
+                        if (type) {
+                            return {
+                                kind: ScriptElementKind.unknown,
+                                kindModifiers: ScriptElementKindModifier.none,
+                                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
+                                displayParts: ts.typeToDisplayParts(typeChecker, type, getContainerNode(node)),
+                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined
+                            };
+                        }
+                }
+                return undefined;
+            }
+            var displayPartsDocumentationsAndKind = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, getContainerNode(node), node);
+            return {
+                kind: displayPartsDocumentationsAndKind.symbolKind,
+                kindModifiers: getSymbolModifiers(symbol),
+                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
+                displayParts: displayPartsDocumentationsAndKind.displayParts,
+                documentation: displayPartsDocumentationsAndKind.documentation
+            };
+        }
+        function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
+            return {
+                fileName: node.getSourceFile().fileName,
+                textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
+                kind: symbolKind,
+                name: symbolName,
+                containerKind: undefined,
+                containerName: containerName
+            };
+        }
+        function getDefinitionFromSymbol(symbol, node) {
+            var typeChecker = program.getTypeChecker();
+            var result = [];
+            var declarations = symbol.getDeclarations();
+            var symbolName = typeChecker.symbolToString(symbol);
+            var symbolKind = getSymbolKind(symbol, node);
+            var containerSymbol = symbol.parent;
+            var containerName = containerSymbol ? typeChecker.symbolToString(containerSymbol, node) : "";
+            if (!tryAddConstructSignature(symbol, node, symbolKind, symbolName, containerName, result) &&
+                !tryAddCallSignature(symbol, node, symbolKind, symbolName, containerName, result)) {
+                ts.forEach(declarations, function (declaration) {
+                    result.push(createDefinitionInfo(declaration, symbolKind, symbolName, containerName));
+                });
+            }
+            return result;
+            function tryAddConstructSignature(symbol, location, symbolKind, symbolName, containerName, result) {
+                if (isNewExpressionTarget(location) || location.kind === 121) {
+                    if (symbol.flags & 32) {
+                        for (var _i = 0, _a = symbol.getDeclarations(); _i < _a.length; _i++) {
+                            var declaration = _a[_i];
+                            if (ts.isClassLike(declaration)) {
+                                return tryAddSignature(declaration.members, true, symbolKind, symbolName, containerName, result);
+                            }
+                        }
+                        ts.Debug.fail("Expected declaration to have at least one class-like declaration");
+                    }
+                }
+                return false;
+            }
+            function tryAddCallSignature(symbol, location, symbolKind, symbolName, containerName, result) {
+                if (isCallExpressionTarget(location) || isNewExpressionTarget(location) || isNameOfFunctionDeclaration(location)) {
+                    return tryAddSignature(symbol.declarations, false, symbolKind, symbolName, containerName, result);
+                }
+                return false;
+            }
+            function tryAddSignature(signatureDeclarations, selectConstructors, symbolKind, symbolName, containerName, result) {
+                var declarations = [];
+                var definition;
+                ts.forEach(signatureDeclarations, function (d) {
+                    if ((selectConstructors && d.kind === 148) ||
+                        (!selectConstructors && (d.kind === 220 || d.kind === 147 || d.kind === 146))) {
+                        declarations.push(d);
+                        if (d.body)
+                            definition = d;
+                    }
+                });
+                if (definition) {
+                    result.push(createDefinitionInfo(definition, symbolKind, symbolName, containerName));
+                    return true;
+                }
+                else if (declarations.length) {
+                    result.push(createDefinitionInfo(ts.lastOrUndefined(declarations), symbolKind, symbolName, containerName));
+                    return true;
+                }
+                return false;
+            }
+        }
+        function findReferenceInPosition(refs, pos) {
+            for (var _i = 0, refs_1 = refs; _i < refs_1.length; _i++) {
+                var ref = refs_1[_i];
+                if (ref.pos <= pos && pos < ref.end) {
+                    return ref;
+                }
+            }
+            return undefined;
+        }
+        function getDefinitionInfoForFileReference(name, targetFileName) {
+            return {
+                fileName: targetFileName,
+                textSpan: ts.createTextSpanFromBounds(0, 0),
+                kind: ScriptElementKind.scriptElement,
+                name: name,
+                containerName: undefined,
+                containerKind: undefined
+            };
+        }
+        function getDefinitionAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var comment = findReferenceInPosition(sourceFile.referencedFiles, position);
+            if (comment) {
+                var referenceFile = ts.tryResolveScriptReference(program, sourceFile, comment);
+                if (referenceFile) {
+                    return [getDefinitionInfoForFileReference(comment.fileName, referenceFile.fileName)];
+                }
+                return undefined;
+            }
+            var typeReferenceDirective = findReferenceInPosition(sourceFile.typeReferenceDirectives, position);
+            if (typeReferenceDirective) {
+                var referenceFile = ts.lookUp(program.getResolvedTypeReferenceDirectives(), typeReferenceDirective.fileName);
+                if (referenceFile && referenceFile.resolvedFileName) {
+                    return [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
+                }
+                return undefined;
+            }
+            var node = ts.getTouchingPropertyName(sourceFile, position);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            if (isJumpStatementTarget(node)) {
+                var labelName = node.text;
+                var label = getTargetLabel(node.parent, node.text);
+                return label ? [createDefinitionInfo(label, ScriptElementKind.label, labelName, undefined)] : undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol) {
+                return undefined;
+            }
+            if (symbol.flags & 8388608) {
+                var declaration = symbol.declarations[0];
+                if (node.kind === 69 &&
+                    (node.parent === declaration ||
+                        (declaration.kind === 234 && declaration.parent && declaration.parent.kind === 233))) {
+                    symbol = typeChecker.getAliasedSymbol(symbol);
+                }
+            }
+            if (node.parent.kind === 254) {
+                var shorthandSymbol = typeChecker.getShorthandAssignmentValueSymbol(symbol.valueDeclaration);
+                if (!shorthandSymbol) {
+                    return [];
+                }
+                var shorthandDeclarations = shorthandSymbol.getDeclarations();
+                var shorthandSymbolKind_1 = getSymbolKind(shorthandSymbol, node);
+                var shorthandSymbolName_1 = typeChecker.symbolToString(shorthandSymbol);
+                var shorthandContainerName_1 = typeChecker.symbolToString(symbol.parent, node);
+                return ts.map(shorthandDeclarations, function (declaration) { return createDefinitionInfo(declaration, shorthandSymbolKind_1, shorthandSymbolName_1, shorthandContainerName_1); });
+            }
+            return getDefinitionFromSymbol(symbol, node);
+        }
+        function getTypeDefinitionAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, position);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol) {
+                return undefined;
+            }
+            var type = typeChecker.getTypeOfSymbolAtLocation(symbol, node);
+            if (!type) {
+                return undefined;
+            }
+            if (type.flags & 16384) {
+                var result_3 = [];
+                ts.forEach(type.types, function (t) {
+                    if (t.symbol) {
+                        ts.addRange(result_3, getDefinitionFromSymbol(t.symbol, node));
+                    }
+                });
+                return result_3;
+            }
+            if (!type.symbol) {
+                return undefined;
+            }
+            return getDefinitionFromSymbol(type.symbol, node);
+        }
+        function getOccurrencesAtPosition(fileName, position) {
+            var results = getOccurrencesAtPositionCore(fileName, position);
+            if (results) {
+                var sourceFile_1 = getCanonicalFileName(ts.normalizeSlashes(fileName));
+                results = ts.filter(results, function (r) { return getCanonicalFileName(ts.normalizeSlashes(r.fileName)) === sourceFile_1; });
+            }
+            return results;
+        }
+        function getDocumentHighlights(fileName, position, filesToSearch) {
+            synchronizeHostData();
+            var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingWord(sourceFile, position);
+            if (!node) {
+                return undefined;
+            }
+            return getSemanticDocumentHighlights(node) || getSyntacticDocumentHighlights(node);
+            function getHighlightSpanForNode(node) {
+                var start = node.getStart();
+                var end = node.getEnd();
+                return {
+                    fileName: sourceFile.fileName,
+                    textSpan: ts.createTextSpanFromBounds(start, end),
+                    kind: HighlightSpanKind.none
+                };
+            }
+            function getSemanticDocumentHighlights(node) {
+                if (node.kind === 69 ||
+                    node.kind === 97 ||
+                    node.kind === 165 ||
+                    node.kind === 95 ||
+                    node.kind === 9 ||
+                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                    var referencedSymbols = getReferencedSymbolsForNode(node, sourceFilesToSearch, false, false);
+                    return convertReferencedSymbols(referencedSymbols);
+                }
+                return undefined;
+                function convertReferencedSymbols(referencedSymbols) {
+                    if (!referencedSymbols) {
+                        return undefined;
+                    }
+                    var fileNameToDocumentHighlights = {};
+                    var result = [];
+                    for (var _i = 0, referencedSymbols_1 = referencedSymbols; _i < referencedSymbols_1.length; _i++) {
+                        var referencedSymbol = referencedSymbols_1[_i];
+                        for (var _a = 0, _b = referencedSymbol.references; _a < _b.length; _a++) {
+                            var referenceEntry = _b[_a];
+                            var fileName_1 = referenceEntry.fileName;
+                            var documentHighlights = ts.getProperty(fileNameToDocumentHighlights, fileName_1);
+                            if (!documentHighlights) {
+                                documentHighlights = { fileName: fileName_1, highlightSpans: [] };
+                                fileNameToDocumentHighlights[fileName_1] = documentHighlights;
+                                result.push(documentHighlights);
+                            }
+                            documentHighlights.highlightSpans.push({
+                                textSpan: referenceEntry.textSpan,
+                                kind: referenceEntry.isWriteAccess ? HighlightSpanKind.writtenReference : HighlightSpanKind.reference
+                            });
+                        }
+                    }
+                    return result;
+                }
+            }
+            function getSyntacticDocumentHighlights(node) {
+                var fileName = sourceFile.fileName;
+                var highlightSpans = getHighlightSpans(node);
+                if (!highlightSpans || highlightSpans.length === 0) {
+                    return undefined;
+                }
+                return [{ fileName: fileName, highlightSpans: highlightSpans }];
+                function hasKind(node, kind) {
+                    return node !== undefined && node.kind === kind;
+                }
+                function parent(node) {
+                    return node && node.parent;
+                }
+                function getHighlightSpans(node) {
+                    if (node) {
+                        switch (node.kind) {
+                            case 88:
+                            case 80:
+                                if (hasKind(node.parent, 203)) {
+                                    return getIfElseOccurrences(node.parent);
+                                }
+                                break;
+                            case 94:
+                                if (hasKind(node.parent, 211)) {
+                                    return getReturnOccurrences(node.parent);
+                                }
+                                break;
+                            case 98:
+                                if (hasKind(node.parent, 215)) {
+                                    return getThrowOccurrences(node.parent);
+                                }
+                                break;
+                            case 72:
+                                if (hasKind(parent(parent(node)), 216)) {
+                                    return getTryCatchFinallyOccurrences(node.parent.parent);
+                                }
+                                break;
+                            case 100:
+                            case 85:
+                                if (hasKind(parent(node), 216)) {
+                                    return getTryCatchFinallyOccurrences(node.parent);
+                                }
+                                break;
+                            case 96:
+                                if (hasKind(node.parent, 213)) {
+                                    return getSwitchCaseDefaultOccurrences(node.parent);
+                                }
+                                break;
+                            case 71:
+                            case 77:
+                                if (hasKind(parent(parent(parent(node))), 213)) {
+                                    return getSwitchCaseDefaultOccurrences(node.parent.parent.parent);
+                                }
+                                break;
+                            case 70:
+                            case 75:
+                                if (hasKind(node.parent, 210) || hasKind(node.parent, 209)) {
+                                    return getBreakOrContinueStatementOccurrences(node.parent);
+                                }
+                                break;
+                            case 86:
+                                if (hasKind(node.parent, 206) ||
+                                    hasKind(node.parent, 207) ||
+                                    hasKind(node.parent, 208)) {
+                                    return getLoopBreakContinueOccurrences(node.parent);
+                                }
+                                break;
+                            case 104:
+                            case 79:
+                                if (hasKind(node.parent, 205) || hasKind(node.parent, 204)) {
+                                    return getLoopBreakContinueOccurrences(node.parent);
+                                }
+                                break;
+                            case 121:
+                                if (hasKind(node.parent, 148)) {
+                                    return getConstructorOccurrences(node.parent);
+                                }
+                                break;
+                            case 123:
+                            case 131:
+                                if (hasKind(node.parent, 149) || hasKind(node.parent, 150)) {
+                                    return getGetAndSetOccurrences(node.parent);
+                                }
+                                break;
+                            default:
+                                if (ts.isModifierKind(node.kind) && node.parent &&
+                                    (ts.isDeclaration(node.parent) || node.parent.kind === 200)) {
+                                    return getModifierOccurrences(node.kind, node.parent);
+                                }
+                        }
+                    }
+                    return undefined;
+                }
+                function aggregateOwnedThrowStatements(node) {
+                    var statementAccumulator = [];
+                    aggregate(node);
+                    return statementAccumulator;
+                    function aggregate(node) {
+                        if (node.kind === 215) {
+                            statementAccumulator.push(node);
+                        }
+                        else if (node.kind === 216) {
+                            var tryStatement = node;
+                            if (tryStatement.catchClause) {
+                                aggregate(tryStatement.catchClause);
+                            }
+                            else {
+                                aggregate(tryStatement.tryBlock);
+                            }
+                            if (tryStatement.finallyBlock) {
+                                aggregate(tryStatement.finallyBlock);
+                            }
+                        }
+                        else if (!ts.isFunctionLike(node)) {
+                            ts.forEachChild(node, aggregate);
+                        }
+                    }
+                }
+                function getThrowStatementOwner(throwStatement) {
+                    var child = throwStatement;
+                    while (child.parent) {
+                        var parent_19 = child.parent;
+                        if (ts.isFunctionBlock(parent_19) || parent_19.kind === 256) {
+                            return parent_19;
+                        }
+                        if (parent_19.kind === 216) {
+                            var tryStatement = parent_19;
+                            if (tryStatement.tryBlock === child && tryStatement.catchClause) {
+                                return child;
+                            }
+                        }
+                        child = parent_19;
+                    }
+                    return undefined;
+                }
+                function aggregateAllBreakAndContinueStatements(node) {
+                    var statementAccumulator = [];
+                    aggregate(node);
+                    return statementAccumulator;
+                    function aggregate(node) {
+                        if (node.kind === 210 || node.kind === 209) {
+                            statementAccumulator.push(node);
+                        }
+                        else if (!ts.isFunctionLike(node)) {
+                            ts.forEachChild(node, aggregate);
+                        }
+                    }
+                }
+                function ownsBreakOrContinueStatement(owner, statement) {
+                    var actualOwner = getBreakOrContinueOwner(statement);
+                    return actualOwner && actualOwner === owner;
+                }
+                function getBreakOrContinueOwner(statement) {
+                    for (var node_1 = statement.parent; node_1; node_1 = node_1.parent) {
+                        switch (node_1.kind) {
+                            case 213:
+                                if (statement.kind === 209) {
+                                    continue;
+                                }
+                            case 206:
+                            case 207:
+                            case 208:
+                            case 205:
+                            case 204:
+                                if (!statement.label || isLabeledBy(node_1, statement.label.text)) {
+                                    return node_1;
+                                }
+                                break;
+                            default:
+                                if (ts.isFunctionLike(node_1)) {
+                                    return undefined;
+                                }
+                                break;
+                        }
+                    }
+                    return undefined;
+                }
+                function getModifierOccurrences(modifier, declaration) {
+                    var container = declaration.parent;
+                    if (ts.isAccessibilityModifier(modifier)) {
+                        if (!(container.kind === 221 ||
+                            container.kind === 192 ||
+                            (declaration.kind === 142 && hasKind(container, 148)))) {
+                            return undefined;
+                        }
+                    }
+                    else if (modifier === 113) {
+                        if (!(container.kind === 221 || container.kind === 192)) {
+                            return undefined;
+                        }
+                    }
+                    else if (modifier === 82 || modifier === 122) {
+                        if (!(container.kind === 226 || container.kind === 256)) {
+                            return undefined;
+                        }
+                    }
+                    else if (modifier === 115) {
+                        if (!(container.kind === 221 || declaration.kind === 221)) {
+                            return undefined;
+                        }
+                    }
+                    else {
+                        return undefined;
+                    }
+                    var keywords = [];
+                    var modifierFlag = getFlagFromModifier(modifier);
+                    var nodes;
+                    switch (container.kind) {
+                        case 226:
+                        case 256:
+                            if (modifierFlag & 128) {
+                                nodes = declaration.members.concat(declaration);
+                            }
+                            else {
+                                nodes = container.statements;
+                            }
+                            break;
+                        case 148:
+                            nodes = container.parameters.concat(container.parent.members);
+                            break;
+                        case 221:
+                        case 192:
+                            nodes = container.members;
+                            if (modifierFlag & 28) {
+                                var constructor = ts.forEach(container.members, function (member) {
+                                    return member.kind === 148 && member;
+                                });
+                                if (constructor) {
+                                    nodes = nodes.concat(constructor.parameters);
+                                }
+                            }
+                            else if (modifierFlag & 128) {
+                                nodes = nodes.concat(container);
+                            }
+                            break;
+                        default:
+                            ts.Debug.fail("Invalid container kind.");
+                    }
+                    ts.forEach(nodes, function (node) {
+                        if (node.modifiers && node.flags & modifierFlag) {
+                            ts.forEach(node.modifiers, function (child) { return pushKeywordIf(keywords, child, modifier); });
+                        }
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                    function getFlagFromModifier(modifier) {
+                        switch (modifier) {
+                            case 112:
+                                return 4;
+                            case 110:
+                                return 8;
+                            case 111:
+                                return 16;
+                            case 113:
+                                return 32;
+                            case 82:
+                                return 1;
+                            case 122:
+                                return 2;
+                            case 115:
+                                return 128;
+                            default:
+                                ts.Debug.fail();
+                        }
+                    }
+                }
+                function pushKeywordIf(keywordList, token) {
+                    var expected = [];
+                    for (var _i = 2; _i < arguments.length; _i++) {
+                        expected[_i - 2] = arguments[_i];
+                    }
+                    if (token && ts.contains(expected, token.kind)) {
+                        keywordList.push(token);
+                        return true;
+                    }
+                    return false;
+                }
+                function getGetAndSetOccurrences(accessorDeclaration) {
+                    var keywords = [];
+                    tryPushAccessorKeyword(accessorDeclaration.symbol, 149);
+                    tryPushAccessorKeyword(accessorDeclaration.symbol, 150);
+                    return ts.map(keywords, getHighlightSpanForNode);
+                    function tryPushAccessorKeyword(accessorSymbol, accessorKind) {
+                        var accessor = ts.getDeclarationOfKind(accessorSymbol, accessorKind);
+                        if (accessor) {
+                            ts.forEach(accessor.getChildren(), function (child) { return pushKeywordIf(keywords, child, 123, 131); });
+                        }
+                    }
+                }
+                function getConstructorOccurrences(constructorDeclaration) {
+                    var declarations = constructorDeclaration.symbol.getDeclarations();
+                    var keywords = [];
+                    ts.forEach(declarations, function (declaration) {
+                        ts.forEach(declaration.getChildren(), function (token) {
+                            return pushKeywordIf(keywords, token, 121);
+                        });
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getLoopBreakContinueOccurrences(loopNode) {
+                    var keywords = [];
+                    if (pushKeywordIf(keywords, loopNode.getFirstToken(), 86, 104, 79)) {
+                        if (loopNode.kind === 204) {
+                            var loopTokens = loopNode.getChildren();
+                            for (var i = loopTokens.length - 1; i >= 0; i--) {
+                                if (pushKeywordIf(keywords, loopTokens[i], 104)) {
+                                    break;
+                                }
+                            }
+                        }
+                    }
+                    var breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
+                    ts.forEach(breaksAndContinues, function (statement) {
+                        if (ownsBreakOrContinueStatement(loopNode, statement)) {
+                            pushKeywordIf(keywords, statement.getFirstToken(), 70, 75);
+                        }
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getBreakOrContinueStatementOccurrences(breakOrContinueStatement) {
+                    var owner = getBreakOrContinueOwner(breakOrContinueStatement);
+                    if (owner) {
+                        switch (owner.kind) {
+                            case 206:
+                            case 207:
+                            case 208:
+                            case 204:
+                            case 205:
+                                return getLoopBreakContinueOccurrences(owner);
+                            case 213:
+                                return getSwitchCaseDefaultOccurrences(owner);
+                        }
+                    }
+                    return undefined;
+                }
+                function getSwitchCaseDefaultOccurrences(switchStatement) {
+                    var keywords = [];
+                    pushKeywordIf(keywords, switchStatement.getFirstToken(), 96);
+                    ts.forEach(switchStatement.caseBlock.clauses, function (clause) {
+                        pushKeywordIf(keywords, clause.getFirstToken(), 71, 77);
+                        var breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
+                        ts.forEach(breaksAndContinues, function (statement) {
+                            if (ownsBreakOrContinueStatement(switchStatement, statement)) {
+                                pushKeywordIf(keywords, statement.getFirstToken(), 70);
+                            }
+                        });
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getTryCatchFinallyOccurrences(tryStatement) {
+                    var keywords = [];
+                    pushKeywordIf(keywords, tryStatement.getFirstToken(), 100);
+                    if (tryStatement.catchClause) {
+                        pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), 72);
+                    }
+                    if (tryStatement.finallyBlock) {
+                        var finallyKeyword = ts.findChildOfKind(tryStatement, 85, sourceFile);
+                        pushKeywordIf(keywords, finallyKeyword, 85);
+                    }
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getThrowOccurrences(throwStatement) {
+                    var owner = getThrowStatementOwner(throwStatement);
+                    if (!owner) {
+                        return undefined;
+                    }
+                    var keywords = [];
+                    ts.forEach(aggregateOwnedThrowStatements(owner), function (throwStatement) {
+                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98);
+                    });
+                    if (ts.isFunctionBlock(owner)) {
+                        ts.forEachReturnStatement(owner, function (returnStatement) {
+                            pushKeywordIf(keywords, returnStatement.getFirstToken(), 94);
+                        });
+                    }
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getReturnOccurrences(returnStatement) {
+                    var func = ts.getContainingFunction(returnStatement);
+                    if (!(func && hasKind(func.body, 199))) {
+                        return undefined;
+                    }
+                    var keywords = [];
+                    ts.forEachReturnStatement(func.body, function (returnStatement) {
+                        pushKeywordIf(keywords, returnStatement.getFirstToken(), 94);
+                    });
+                    ts.forEach(aggregateOwnedThrowStatements(func.body), function (throwStatement) {
+                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98);
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getIfElseOccurrences(ifStatement) {
+                    var keywords = [];
+                    while (hasKind(ifStatement.parent, 203) && ifStatement.parent.elseStatement === ifStatement) {
+                        ifStatement = ifStatement.parent;
+                    }
+                    while (ifStatement) {
+                        var children = ifStatement.getChildren();
+                        pushKeywordIf(keywords, children[0], 88);
+                        for (var i = children.length - 1; i >= 0; i--) {
+                            if (pushKeywordIf(keywords, children[i], 80)) {
+                                break;
+                            }
+                        }
+                        if (!hasKind(ifStatement.elseStatement, 203)) {
+                            break;
+                        }
+                        ifStatement = ifStatement.elseStatement;
+                    }
+                    var result = [];
+                    for (var i = 0; i < keywords.length; i++) {
+                        if (keywords[i].kind === 80 && i < keywords.length - 1) {
+                            var elseKeyword = keywords[i];
+                            var ifKeyword = keywords[i + 1];
+                            var shouldCombindElseAndIf = true;
+                            for (var j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
+                                if (!ts.isWhiteSpace(sourceFile.text.charCodeAt(j))) {
+                                    shouldCombindElseAndIf = false;
+                                    break;
+                                }
+                            }
+                            if (shouldCombindElseAndIf) {
+                                result.push({
+                                    fileName: fileName,
+                                    textSpan: ts.createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
+                                    kind: HighlightSpanKind.reference
+                                });
+                                i++;
+                                continue;
+                            }
+                        }
+                        result.push(getHighlightSpanForNode(keywords[i]));
+                    }
+                    return result;
+                }
+            }
+        }
+        function getOccurrencesAtPositionCore(fileName, position) {
+            synchronizeHostData();
+            return convertDocumentHighlights(getDocumentHighlights(fileName, position, [fileName]));
+            function convertDocumentHighlights(documentHighlights) {
+                if (!documentHighlights) {
+                    return undefined;
+                }
+                var result = [];
+                for (var _i = 0, documentHighlights_1 = documentHighlights; _i < documentHighlights_1.length; _i++) {
+                    var entry = documentHighlights_1[_i];
+                    for (var _a = 0, _b = entry.highlightSpans; _a < _b.length; _a++) {
+                        var highlightSpan = _b[_a];
+                        result.push({
+                            fileName: entry.fileName,
+                            textSpan: highlightSpan.textSpan,
+                            isWriteAccess: highlightSpan.kind === HighlightSpanKind.writtenReference
+                        });
+                    }
+                }
+                return result;
+            }
+        }
+        function convertReferences(referenceSymbols) {
+            if (!referenceSymbols) {
+                return undefined;
+            }
+            var referenceEntries = [];
+            for (var _i = 0, referenceSymbols_1 = referenceSymbols; _i < referenceSymbols_1.length; _i++) {
+                var referenceSymbol = referenceSymbols_1[_i];
+                ts.addRange(referenceEntries, referenceSymbol.references);
+            }
+            return referenceEntries;
+        }
+        function findRenameLocations(fileName, position, findInStrings, findInComments) {
+            var referencedSymbols = findReferencedSymbols(fileName, position, findInStrings, findInComments);
+            return convertReferences(referencedSymbols);
+        }
+        function getReferencesAtPosition(fileName, position) {
+            var referencedSymbols = findReferencedSymbols(fileName, position, false, false);
+            return convertReferences(referencedSymbols);
+        }
+        function findReferences(fileName, position) {
+            var referencedSymbols = findReferencedSymbols(fileName, position, false, false);
+            return ts.filter(referencedSymbols, function (rs) { return !!rs.definition; });
+        }
+        function findReferencedSymbols(fileName, position, findInStrings, findInComments) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, position, true);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            if (node.kind !== 69 &&
+                node.kind !== 9 &&
+                !isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                return undefined;
+            }
+            ts.Debug.assert(node.kind === 69 || node.kind === 8 || node.kind === 9);
+            return getReferencedSymbolsForNode(node, program.getSourceFiles(), findInStrings, findInComments);
+        }
+        function getReferencedSymbolsForNode(node, sourceFiles, findInStrings, findInComments) {
+            var typeChecker = program.getTypeChecker();
+            if (isLabelName(node)) {
+                if (isJumpStatementTarget(node)) {
+                    var labelDefinition = getTargetLabel(node.parent, node.text);
+                    return labelDefinition ? getLabelReferencesInNode(labelDefinition.parent, labelDefinition) : undefined;
+                }
+                else {
+                    return getLabelReferencesInNode(node.parent, node);
+                }
+            }
+            if (node.kind === 97 || node.kind === 165) {
+                return getReferencesForThisKeyword(node, sourceFiles);
+            }
+            if (node.kind === 95) {
+                return getReferencesForSuperKeyword(node);
+            }
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol && node.kind === 9) {
+                return getReferencesForStringLiteral(node, sourceFiles);
+            }
+            if (!symbol) {
+                return undefined;
+            }
+            var declarations = symbol.declarations;
+            if (!declarations || !declarations.length) {
+                return undefined;
+            }
+            var result;
+            var searchMeaning = getIntersectingMeaningFromDeclarations(getMeaningFromLocation(node), declarations);
+            var declaredName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
+            var scope = getSymbolScope(symbol);
+            var symbolToIndex = [];
+            if (scope) {
+                result = [];
+                getReferencesInNode(scope, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
+            }
+            else {
+                var internedName = getInternedName(symbol, node, declarations);
+                for (var _i = 0, sourceFiles_4 = sourceFiles; _i < sourceFiles_4.length; _i++) {
+                    var sourceFile = sourceFiles_4[_i];
+                    cancellationToken.throwIfCancellationRequested();
+                    var nameTable = getNameTable(sourceFile);
+                    if (ts.lookUp(nameTable, internedName) !== undefined) {
+                        result = result || [];
+                        getReferencesInNode(sourceFile, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
+                    }
+                }
+            }
+            return result;
+            function getDefinition(symbol) {
+                var info = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, node.getSourceFile(), getContainerNode(node), node);
+                var name = ts.map(info.displayParts, function (p) { return p.text; }).join("");
+                var declarations = symbol.declarations;
+                if (!declarations || declarations.length === 0) {
+                    return undefined;
+                }
+                return {
+                    containerKind: "",
+                    containerName: "",
+                    name: name,
+                    kind: info.symbolKind,
+                    fileName: declarations[0].getSourceFile().fileName,
+                    textSpan: ts.createTextSpan(declarations[0].getStart(), 0)
+                };
+            }
+            function getAliasSymbolForPropertyNameSymbol(symbol, location) {
+                if (symbol.flags & 8388608) {
+                    var defaultImport = ts.getDeclarationOfKind(symbol, 231);
+                    if (defaultImport) {
+                        return typeChecker.getAliasedSymbol(symbol);
+                    }
+                    var importOrExportSpecifier = ts.forEach(symbol.declarations, function (declaration) { return (declaration.kind === 234 ||
+                        declaration.kind === 238) ? declaration : undefined; });
+                    if (importOrExportSpecifier &&
+                        (!importOrExportSpecifier.propertyName ||
+                            importOrExportSpecifier.propertyName === location)) {
+                        return importOrExportSpecifier.kind === 234 ?
+                            typeChecker.getAliasedSymbol(symbol) :
+                            typeChecker.getExportSpecifierLocalTargetSymbol(importOrExportSpecifier);
+                    }
+                }
+                return undefined;
+            }
+            function getPropertySymbolOfDestructuringAssignment(location) {
+                return ts.isArrayLiteralOrObjectLiteralDestructuringPattern(location.parent.parent) &&
+                    typeChecker.getPropertySymbolOfDestructuringAssignment(location);
+            }
+            function isObjectBindingPatternElementWithoutPropertyName(symbol) {
+                var bindingElement = ts.getDeclarationOfKind(symbol, 169);
+                return bindingElement &&
+                    bindingElement.parent.kind === 167 &&
+                    !bindingElement.propertyName;
+            }
+            function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol) {
+                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
+                    var bindingElement = ts.getDeclarationOfKind(symbol, 169);
+                    var typeOfPattern = typeChecker.getTypeAtLocation(bindingElement.parent);
+                    return typeOfPattern && typeChecker.getPropertyOfType(typeOfPattern, bindingElement.name.text);
+                }
+                return undefined;
+            }
+            function getInternedName(symbol, location, declarations) {
+                if (ts.isImportOrExportSpecifierName(location)) {
+                    return location.getText();
+                }
+                var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
+                symbol = localExportDefaultSymbol || symbol;
+                return ts.stripQuotes(symbol.name);
+            }
+            function getSymbolScope(symbol) {
+                var valueDeclaration = symbol.valueDeclaration;
+                if (valueDeclaration && (valueDeclaration.kind === 179 || valueDeclaration.kind === 192)) {
+                    return valueDeclaration;
+                }
+                if (symbol.flags & (4 | 8192)) {
+                    var privateDeclaration = ts.forEach(symbol.getDeclarations(), function (d) { return (d.flags & 8) ? d : undefined; });
+                    if (privateDeclaration) {
+                        return ts.getAncestor(privateDeclaration, 221);
+                    }
+                }
+                if (symbol.flags & 8388608) {
+                    return undefined;
+                }
+                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
+                    return undefined;
+                }
+                if (symbol.parent || (symbol.flags & 268435456)) {
+                    return undefined;
+                }
+                var scope;
+                var declarations = symbol.getDeclarations();
+                if (declarations) {
+                    for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
+                        var declaration = declarations_9[_i];
+                        var container = getContainerNode(declaration);
+                        if (!container) {
+                            return undefined;
+                        }
+                        if (scope && scope !== container) {
+                            return undefined;
+                        }
+                        if (container.kind === 256 && !ts.isExternalModule(container)) {
+                            return undefined;
+                        }
+                        scope = container;
+                    }
+                }
+                return scope;
+            }
+            function getPossibleSymbolReferencePositions(sourceFile, symbolName, start, end) {
+                var positions = [];
+                if (!symbolName || !symbolName.length) {
+                    return positions;
+                }
+                var text = sourceFile.text;
+                var sourceLength = text.length;
+                var symbolNameLength = symbolName.length;
+                var position = text.indexOf(symbolName, start);
+                while (position >= 0) {
+                    cancellationToken.throwIfCancellationRequested();
+                    if (position > end)
+                        break;
+                    var endPosition = position + symbolNameLength;
+                    if ((position === 0 || !ts.isIdentifierPart(text.charCodeAt(position - 1), 2)) &&
+                        (endPosition === sourceLength || !ts.isIdentifierPart(text.charCodeAt(endPosition), 2))) {
+                        positions.push(position);
+                    }
+                    position = text.indexOf(symbolName, position + symbolNameLength + 1);
+                }
+                return positions;
+            }
+            function getLabelReferencesInNode(container, targetLabel) {
+                var references = [];
+                var sourceFile = container.getSourceFile();
+                var labelName = targetLabel.text;
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container.getStart(), container.getEnd());
+                ts.forEach(possiblePositions, function (position) {
+                    cancellationToken.throwIfCancellationRequested();
+                    var node = ts.getTouchingWord(sourceFile, position);
+                    if (!node || node.getWidth() !== labelName.length) {
+                        return;
+                    }
+                    if (node === targetLabel ||
+                        (isJumpStatementTarget(node) && getTargetLabel(node, labelName) === targetLabel)) {
+                        references.push(getReferenceEntryFromNode(node));
+                    }
+                });
+                var definition = {
+                    containerKind: "",
+                    containerName: "",
+                    fileName: targetLabel.getSourceFile().fileName,
+                    kind: ScriptElementKind.label,
+                    name: labelName,
+                    textSpan: ts.createTextSpanFromBounds(targetLabel.getStart(), targetLabel.getEnd())
+                };
+                return [{ definition: definition, references: references }];
+            }
+            function isValidReferencePosition(node, searchSymbolName) {
+                if (node) {
+                    switch (node.kind) {
+                        case 69:
+                            return node.getWidth() === searchSymbolName.length;
+                        case 9:
+                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
+                                isNameOfExternalModuleImportOrDeclaration(node)) {
+                                return node.getWidth() === searchSymbolName.length + 2;
+                            }
+                            break;
+                        case 8:
+                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                                return node.getWidth() === searchSymbolName.length;
+                            }
+                            break;
+                    }
+                }
+                return false;
+            }
+            function getReferencesInNode(container, searchSymbol, searchText, searchLocation, searchMeaning, findInStrings, findInComments, result, symbolToIndex) {
+                var sourceFile = container.getSourceFile();
+                var tripleSlashDirectivePrefixRegex = /^\/\/\/\s*</;
+                var start = findInComments ? container.getFullStart() : container.getStart();
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, start, container.getEnd());
+                if (possiblePositions.length) {
+                    var searchSymbols_1 = populateSearchSymbolSet(searchSymbol, searchLocation);
+                    ts.forEach(possiblePositions, function (position) {
+                        cancellationToken.throwIfCancellationRequested();
+                        var referenceLocation = ts.getTouchingPropertyName(sourceFile, position);
+                        if (!isValidReferencePosition(referenceLocation, searchText)) {
+                            if ((findInStrings && ts.isInString(sourceFile, position)) ||
+                                (findInComments && isInNonReferenceComment(sourceFile, position))) {
+                                result.push({
+                                    definition: undefined,
+                                    references: [{
+                                            fileName: sourceFile.fileName,
+                                            textSpan: ts.createTextSpan(position, searchText.length),
+                                            isWriteAccess: false
+                                        }]
+                                });
+                            }
+                            return;
+                        }
+                        if (!(getMeaningFromLocation(referenceLocation) & searchMeaning)) {
+                            return;
+                        }
+                        var referenceSymbol = typeChecker.getSymbolAtLocation(referenceLocation);
+                        if (referenceSymbol) {
+                            var referenceSymbolDeclaration = referenceSymbol.valueDeclaration;
+                            var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(referenceSymbolDeclaration);
+                            var relatedSymbol = getRelatedSymbol(searchSymbols_1, referenceSymbol, referenceLocation);
+                            if (relatedSymbol) {
+                                var referencedSymbol = getReferencedSymbol(relatedSymbol);
+                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceLocation));
+                            }
+                            else if (!(referenceSymbol.flags & 67108864) && searchSymbols_1.indexOf(shorthandValueSymbol) >= 0) {
+                                var referencedSymbol = getReferencedSymbol(shorthandValueSymbol);
+                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceSymbolDeclaration.name));
+                            }
+                        }
+                    });
+                }
+                return;
+                function getReferencedSymbol(symbol) {
+                    var symbolId = ts.getSymbolId(symbol);
+                    var index = symbolToIndex[symbolId];
+                    if (index === undefined) {
+                        index = result.length;
+                        symbolToIndex[symbolId] = index;
+                        result.push({
+                            definition: getDefinition(symbol),
+                            references: []
+                        });
+                    }
+                    return result[index];
+                }
+                function isInNonReferenceComment(sourceFile, position) {
+                    return ts.isInCommentHelper(sourceFile, position, isNonReferenceComment);
+                    function isNonReferenceComment(c) {
+                        var commentText = sourceFile.text.substring(c.pos, c.end);
+                        return !tripleSlashDirectivePrefixRegex.test(commentText);
+                    }
+                }
+            }
+            function getReferencesForSuperKeyword(superKeyword) {
+                var searchSpaceNode = ts.getSuperContainer(superKeyword, false);
+                if (!searchSpaceNode) {
+                    return undefined;
+                }
+                var staticFlag = 32;
+                switch (searchSpaceNode.kind) {
+                    case 145:
+                    case 144:
+                    case 147:
+                    case 146:
+                    case 148:
+                    case 149:
+                    case 150:
+                        staticFlag &= searchSpaceNode.flags;
+                        searchSpaceNode = searchSpaceNode.parent;
+                        break;
+                    default:
+                        return undefined;
+                }
+                var references = [];
+                var sourceFile = searchSpaceNode.getSourceFile();
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
+                ts.forEach(possiblePositions, function (position) {
+                    cancellationToken.throwIfCancellationRequested();
+                    var node = ts.getTouchingWord(sourceFile, position);
+                    if (!node || node.kind !== 95) {
+                        return;
+                    }
+                    var container = ts.getSuperContainer(node, false);
+                    if (container && (32 & container.flags) === staticFlag && container.parent.symbol === searchSpaceNode.symbol) {
+                        references.push(getReferenceEntryFromNode(node));
+                    }
+                });
+                var definition = getDefinition(searchSpaceNode.symbol);
+                return [{ definition: definition, references: references }];
+            }
+            function getReferencesForThisKeyword(thisOrSuperKeyword, sourceFiles) {
+                var searchSpaceNode = ts.getThisContainer(thisOrSuperKeyword, false);
+                var staticFlag = 32;
+                switch (searchSpaceNode.kind) {
+                    case 147:
+                    case 146:
+                        if (ts.isObjectLiteralMethod(searchSpaceNode)) {
+                            break;
+                        }
+                    case 145:
+                    case 144:
+                    case 148:
+                    case 149:
+                    case 150:
+                        staticFlag &= searchSpaceNode.flags;
+                        searchSpaceNode = searchSpaceNode.parent;
+                        break;
+                    case 256:
+                        if (ts.isExternalModule(searchSpaceNode)) {
+                            return undefined;
+                        }
+                    case 220:
+                    case 179:
+                        break;
+                    default:
+                        return undefined;
+                }
+                var references = [];
+                var possiblePositions;
+                if (searchSpaceNode.kind === 256) {
+                    ts.forEach(sourceFiles, function (sourceFile) {
+                        possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", sourceFile.getStart(), sourceFile.getEnd());
+                        getThisReferencesInFile(sourceFile, sourceFile, possiblePositions, references);
+                    });
+                }
+                else {
+                    var sourceFile = searchSpaceNode.getSourceFile();
+                    possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
+                    getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, references);
+                }
+                return [{
+                        definition: {
+                            containerKind: "",
+                            containerName: "",
+                            fileName: node.getSourceFile().fileName,
+                            kind: ScriptElementKind.variableElement,
+                            name: "this",
+                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
+                        },
+                        references: references
+                    }];
+                function getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, result) {
+                    ts.forEach(possiblePositions, function (position) {
+                        cancellationToken.throwIfCancellationRequested();
+                        var node = ts.getTouchingWord(sourceFile, position);
+                        if (!node || (node.kind !== 97 && node.kind !== 165)) {
+                            return;
+                        }
+                        var container = ts.getThisContainer(node, false);
+                        switch (searchSpaceNode.kind) {
+                            case 179:
+                            case 220:
+                                if (searchSpaceNode.symbol === container.symbol) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                            case 147:
+                            case 146:
+                                if (ts.isObjectLiteralMethod(searchSpaceNode) && searchSpaceNode.symbol === container.symbol) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                            case 192:
+                            case 221:
+                                if (container.parent && searchSpaceNode.symbol === container.parent.symbol && (container.flags & 32) === staticFlag) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                            case 256:
+                                if (container.kind === 256 && !ts.isExternalModule(container)) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                        }
+                    });
+                }
+            }
+            function getReferencesForStringLiteral(node, sourceFiles) {
+                var typeChecker = program.getTypeChecker();
+                var type = getStringLiteralTypeForNode(node, typeChecker);
+                if (!type) {
+                    return undefined;
+                }
+                var references = [];
+                for (var _i = 0, sourceFiles_5 = sourceFiles; _i < sourceFiles_5.length; _i++) {
+                    var sourceFile = sourceFiles_5[_i];
+                    var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, type.text, sourceFile.getStart(), sourceFile.getEnd());
+                    getReferencesForStringLiteralInFile(sourceFile, type, possiblePositions, references);
+                }
+                return [{
+                        definition: {
+                            containerKind: "",
+                            containerName: "",
+                            fileName: node.getSourceFile().fileName,
+                            kind: ScriptElementKind.variableElement,
+                            name: type.text,
+                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
+                        },
+                        references: references
+                    }];
+                function getReferencesForStringLiteralInFile(sourceFile, searchType, possiblePositions, references) {
+                    for (var _i = 0, possiblePositions_1 = possiblePositions; _i < possiblePositions_1.length; _i++) {
+                        var position = possiblePositions_1[_i];
+                        cancellationToken.throwIfCancellationRequested();
+                        var node_2 = ts.getTouchingWord(sourceFile, position);
+                        if (!node_2 || node_2.kind !== 9) {
+                            return;
+                        }
+                        var type_1 = getStringLiteralTypeForNode(node_2, typeChecker);
+                        if (type_1 === searchType) {
+                            references.push(getReferenceEntryFromNode(node_2));
+                        }
+                    }
+                }
+            }
+            function populateSearchSymbolSet(symbol, location) {
+                var result = [symbol];
+                var containingObjectLiteralElement = getContainingObjectLiteralElement(location);
+                if (containingObjectLiteralElement && containingObjectLiteralElement.kind !== 254) {
+                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(location);
+                    if (propertySymbol) {
+                        result.push(propertySymbol);
+                    }
+                }
+                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(symbol, location);
+                if (aliasSymbol) {
+                    result = result.concat(populateSearchSymbolSet(aliasSymbol, location));
+                }
+                if (containingObjectLiteralElement) {
+                    ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
+                        ts.addRange(result, typeChecker.getRootSymbols(contextualSymbol));
+                    });
+                    var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(location.parent);
+                    if (shorthandValueSymbol) {
+                        result.push(shorthandValueSymbol);
+                    }
+                }
+                if (symbol.valueDeclaration && symbol.valueDeclaration.kind === 142 &&
+                    ts.isParameterPropertyDeclaration(symbol.valueDeclaration)) {
+                    result = result.concat(typeChecker.getSymbolsOfParameterPropertyDeclaration(symbol.valueDeclaration, symbol.name));
+                }
+                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol);
+                if (bindingElementPropertySymbol) {
+                    result.push(bindingElementPropertySymbol);
+                }
+                ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
+                    if (rootSymbol !== symbol) {
+                        result.push(rootSymbol);
+                    }
+                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 | 64)) {
+                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, {});
+                    }
+                });
+                return result;
+            }
+            function getPropertySymbolsFromBaseTypes(symbol, propertyName, result, previousIterationSymbolsCache) {
+                if (!symbol) {
+                    return;
+                }
+                if (ts.hasProperty(previousIterationSymbolsCache, symbol.name)) {
+                    return;
+                }
+                if (symbol.flags & (32 | 64)) {
+                    ts.forEach(symbol.getDeclarations(), function (declaration) {
+                        if (ts.isClassLike(declaration)) {
+                            getPropertySymbolFromTypeReference(ts.getClassExtendsHeritageClauseElement(declaration));
+                            ts.forEach(ts.getClassImplementsHeritageClauseElements(declaration), getPropertySymbolFromTypeReference);
+                        }
+                        else if (declaration.kind === 222) {
+                            ts.forEach(ts.getInterfaceBaseTypeNodes(declaration), getPropertySymbolFromTypeReference);
+                        }
+                    });
+                }
+                return;
+                function getPropertySymbolFromTypeReference(typeReference) {
+                    if (typeReference) {
+                        var type = typeChecker.getTypeAtLocation(typeReference);
+                        if (type) {
+                            var propertySymbol = typeChecker.getPropertyOfType(type, propertyName);
+                            if (propertySymbol) {
+                                result.push.apply(result, typeChecker.getRootSymbols(propertySymbol));
+                            }
+                            previousIterationSymbolsCache[symbol.name] = symbol;
+                            getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache);
+                        }
+                    }
+                }
+            }
+            function getRelatedSymbol(searchSymbols, referenceSymbol, referenceLocation) {
+                if (searchSymbols.indexOf(referenceSymbol) >= 0) {
+                    return referenceSymbol;
+                }
+                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(referenceSymbol, referenceLocation);
+                if (aliasSymbol) {
+                    return getRelatedSymbol(searchSymbols, aliasSymbol, referenceLocation);
+                }
+                var containingObjectLiteralElement = getContainingObjectLiteralElement(referenceLocation);
+                if (containingObjectLiteralElement) {
+                    var contextualSymbol = ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
+                        return ts.forEach(typeChecker.getRootSymbols(contextualSymbol), function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
+                    });
+                    if (contextualSymbol) {
+                        return contextualSymbol;
+                    }
+                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation);
+                    if (propertySymbol && searchSymbols.indexOf(propertySymbol) >= 0) {
+                        return propertySymbol;
+                    }
+                }
+                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol);
+                if (bindingElementPropertySymbol && searchSymbols.indexOf(bindingElementPropertySymbol) >= 0) {
+                    return bindingElementPropertySymbol;
+                }
+                return ts.forEach(typeChecker.getRootSymbols(referenceSymbol), function (rootSymbol) {
+                    if (searchSymbols.indexOf(rootSymbol) >= 0) {
+                        return rootSymbol;
+                    }
+                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 | 64)) {
+                        var result_4 = [];
+                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result_4, {});
+                        return ts.forEach(result_4, function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
+                    }
+                    return undefined;
+                });
+            }
+            function getNameFromObjectLiteralElement(node) {
+                if (node.name.kind === 140) {
+                    var nameExpression = node.name.expression;
+                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
+                        return nameExpression.text;
+                    }
+                    return undefined;
+                }
+                return node.name.text;
+            }
+            function getPropertySymbolsFromContextualType(node) {
+                var objectLiteral = node.parent;
+                var contextualType = typeChecker.getContextualType(objectLiteral);
+                var name = getNameFromObjectLiteralElement(node);
+                if (name && contextualType) {
+                    var result_5 = [];
+                    var symbol_1 = contextualType.getProperty(name);
+                    if (symbol_1) {
+                        result_5.push(symbol_1);
+                    }
+                    if (contextualType.flags & 16384) {
+                        ts.forEach(contextualType.types, function (t) {
+                            var symbol = t.getProperty(name);
+                            if (symbol) {
+                                result_5.push(symbol);
+                            }
+                        });
+                    }
+                    return result_5;
+                }
+                return undefined;
+            }
+            function getIntersectingMeaningFromDeclarations(meaning, declarations) {
+                if (declarations) {
+                    var lastIterationMeaning = void 0;
+                    do {
+                        lastIterationMeaning = meaning;
+                        for (var _i = 0, declarations_10 = declarations; _i < declarations_10.length; _i++) {
+                            var declaration = declarations_10[_i];
+                            var declarationMeaning = getMeaningFromDeclaration(declaration);
+                            if (declarationMeaning & meaning) {
+                                meaning |= declarationMeaning;
+                            }
+                        }
+                    } while (meaning !== lastIterationMeaning);
+                }
+                return meaning;
+            }
+        }
+        function getReferenceEntryFromNode(node) {
+            var start = node.getStart();
+            var end = node.getEnd();
+            if (node.kind === 9) {
+                start += 1;
+                end -= 1;
+            }
+            return {
+                fileName: node.getSourceFile().fileName,
+                textSpan: ts.createTextSpanFromBounds(start, end),
+                isWriteAccess: isWriteAccess(node)
+            };
+        }
+        function isWriteAccess(node) {
+            if (node.kind === 69 && ts.isDeclarationName(node)) {
+                return true;
+            }
+            var parent = node.parent;
+            if (parent) {
+                if (parent.kind === 186 || parent.kind === 185) {
+                    return true;
+                }
+                else if (parent.kind === 187 && parent.left === node) {
+                    var operator = parent.operatorToken.kind;
+                    return 56 <= operator && operator <= 68;
+                }
+            }
+            return false;
+        }
+        function getNavigateToItems(searchValue, maxResultCount) {
+            synchronizeHostData();
+            var checker = getProgram().getTypeChecker();
+            return ts.NavigateTo.getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount);
+        }
+        function getEmitOutput(fileName) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var outputFiles = [];
+            function writeFile(fileName, data, writeByteOrderMark) {
+                outputFiles.push({
+                    name: fileName,
+                    writeByteOrderMark: writeByteOrderMark,
+                    text: data
+                });
+            }
+            var emitOutput = program.emit(sourceFile, writeFile, cancellationToken);
+            return {
+                outputFiles: outputFiles,
+                emitSkipped: emitOutput.emitSkipped
+            };
+        }
+        function getMeaningFromDeclaration(node) {
+            switch (node.kind) {
+                case 142:
+                case 218:
+                case 169:
+                case 145:
+                case 144:
+                case 253:
+                case 254:
+                case 255:
+                case 147:
+                case 146:
+                case 148:
+                case 149:
+                case 150:
+                case 220:
+                case 179:
+                case 180:
+                case 252:
+                    return 1;
+                case 141:
+                case 222:
+                case 223:
+                case 159:
+                    return 2;
+                case 221:
+                case 224:
+                    return 1 | 2;
+                case 225:
+                    if (ts.isAmbientModule(node)) {
+                        return 4 | 1;
+                    }
+                    else if (ts.getModuleInstanceState(node) === 1) {
+                        return 4 | 1;
+                    }
+                    else {
+                        return 4;
+                    }
+                case 233:
+                case 234:
+                case 229:
+                case 230:
+                case 235:
+                case 236:
+                    return 1 | 2 | 4;
+                case 256:
+                    return 4 | 1;
+            }
+            return 1 | 2 | 4;
+        }
+        function isTypeReference(node) {
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(node)) {
+                node = node.parent;
+            }
+            return node.parent.kind === 155 ||
+                (node.parent.kind === 194 && !ts.isExpressionWithTypeArgumentsInClassExtendsClause(node.parent)) ||
+                (node.kind === 97 && !ts.isExpression(node)) ||
+                node.kind === 165;
+        }
+        function isNamespaceReference(node) {
+            return isQualifiedNameNamespaceReference(node) || isPropertyAccessNamespaceReference(node);
+        }
+        function isPropertyAccessNamespaceReference(node) {
+            var root = node;
+            var isLastClause = true;
+            if (root.parent.kind === 172) {
+                while (root.parent && root.parent.kind === 172) {
+                    root = root.parent;
+                }
+                isLastClause = root.name === node;
+            }
+            if (!isLastClause && root.parent.kind === 194 && root.parent.parent.kind === 251) {
+                var decl = root.parent.parent.parent;
+                return (decl.kind === 221 && root.parent.parent.token === 106) ||
+                    (decl.kind === 222 && root.parent.parent.token === 83);
+            }
+            return false;
+        }
+        function isQualifiedNameNamespaceReference(node) {
+            var root = node;
+            var isLastClause = true;
+            if (root.parent.kind === 139) {
+                while (root.parent && root.parent.kind === 139) {
+                    root = root.parent;
+                }
+                isLastClause = root.right === node;
+            }
+            return root.parent.kind === 155 && !isLastClause;
+        }
+        function isInRightSideOfImport(node) {
+            while (node.parent.kind === 139) {
+                node = node.parent;
+            }
+            return ts.isInternalModuleImportEqualsDeclaration(node.parent) && node.parent.moduleReference === node;
+        }
+        function getMeaningFromRightHandSideOfImportEquals(node) {
+            ts.Debug.assert(node.kind === 69);
+            if (node.parent.kind === 139 &&
+                node.parent.right === node &&
+                node.parent.parent.kind === 229) {
+                return 1 | 2 | 4;
+            }
+            return 4;
+        }
+        function getMeaningFromLocation(node) {
+            if (node.parent.kind === 235) {
+                return 1 | 2 | 4;
+            }
+            else if (isInRightSideOfImport(node)) {
+                return getMeaningFromRightHandSideOfImportEquals(node);
+            }
+            else if (ts.isDeclarationName(node)) {
+                return getMeaningFromDeclaration(node.parent);
+            }
+            else if (isTypeReference(node)) {
+                return 2;
+            }
+            else if (isNamespaceReference(node)) {
+                return 4;
+            }
+            else {
+                return 1;
+            }
+        }
+        function getSignatureHelpItems(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            return ts.SignatureHelp.getSignatureHelpItems(program, sourceFile, position, cancellationToken);
+        }
+        function getNonBoundSourceFile(fileName) {
+            return syntaxTreeCache.getCurrentSourceFile(fileName);
+        }
+        function getNameOrDottedNameSpan(fileName, startPos, endPos) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, startPos);
+            if (node === sourceFile) {
+                return;
+            }
+            switch (node.kind) {
+                case 172:
+                case 139:
+                case 9:
+                case 166:
+                case 84:
+                case 99:
+                case 93:
+                case 95:
+                case 97:
+                case 165:
+                case 69:
+                    break;
+                default:
+                    return;
+            }
+            var nodeForStartPos = node;
+            while (true) {
+                if (isRightSideOfPropertyAccess(nodeForStartPos) || isRightSideOfQualifiedName(nodeForStartPos)) {
+                    nodeForStartPos = nodeForStartPos.parent;
+                }
+                else if (isNameOfModuleDeclaration(nodeForStartPos)) {
+                    if (nodeForStartPos.parent.parent.kind === 225 &&
+                        nodeForStartPos.parent.parent.body === nodeForStartPos.parent) {
+                        nodeForStartPos = nodeForStartPos.parent.parent.name;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                else {
+                    break;
+                }
+            }
+            return ts.createTextSpanFromBounds(nodeForStartPos.getStart(), node.getEnd());
+        }
+        function getBreakpointStatementAtPosition(fileName, position) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.BreakpointResolver.spanInSourceFileAtLocation(sourceFile, position);
+        }
+        function getNavigationBarItems(fileName) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.NavigationBar.getNavigationBarItems(sourceFile, host.getCompilationSettings());
+        }
+        function getSemanticClassifications(fileName, span) {
+            return convertClassifications(getEncodedSemanticClassifications(fileName, span));
+        }
+        function checkForClassificationCancellation(kind) {
+            switch (kind) {
+                case 225:
+                case 221:
+                case 222:
+                case 220:
+                    cancellationToken.throwIfCancellationRequested();
+            }
+        }
+        function getEncodedSemanticClassifications(fileName, span) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var typeChecker = program.getTypeChecker();
+            var result = [];
+            var classifiableNames = program.getClassifiableNames();
+            processNode(sourceFile);
+            return { spans: result, endOfLineState: 0 };
+            function pushClassification(start, length, type) {
+                result.push(start);
+                result.push(length);
+                result.push(type);
+            }
+            function classifySymbol(symbol, meaningAtPosition) {
+                var flags = symbol.getFlags();
+                if ((flags & 788448) === 0) {
+                    return;
+                }
+                if (flags & 32) {
+                    return 11;
+                }
+                else if (flags & 384) {
+                    return 12;
+                }
+                else if (flags & 524288) {
+                    return 16;
+                }
+                else if (meaningAtPosition & 2) {
+                    if (flags & 64) {
+                        return 13;
+                    }
+                    else if (flags & 262144) {
+                        return 15;
+                    }
+                }
+                else if (flags & 1536) {
+                    if (meaningAtPosition & 4 ||
+                        (meaningAtPosition & 1 && hasValueSideModule(symbol))) {
+                        return 14;
+                    }
+                }
+                return undefined;
+                function hasValueSideModule(symbol) {
+                    return ts.forEach(symbol.declarations, function (declaration) {
+                        return declaration.kind === 225 &&
+                            ts.getModuleInstanceState(declaration) === 1;
+                    });
+                }
+            }
+            function processNode(node) {
+                if (node && ts.textSpanIntersectsWith(span, node.getFullStart(), node.getFullWidth())) {
+                    var kind = node.kind;
+                    checkForClassificationCancellation(kind);
+                    if (kind === 69 && !ts.nodeIsMissing(node)) {
+                        var identifier = node;
+                        if (classifiableNames[identifier.text]) {
+                            var symbol = typeChecker.getSymbolAtLocation(node);
+                            if (symbol) {
+                                var type = classifySymbol(symbol, getMeaningFromLocation(node));
+                                if (type) {
+                                    pushClassification(node.getStart(), node.getWidth(), type);
+                                }
+                            }
+                        }
+                    }
+                    ts.forEachChild(node, processNode);
+                }
+            }
+        }
+        function getClassificationTypeName(type) {
+            switch (type) {
+                case 1: return ClassificationTypeNames.comment;
+                case 2: return ClassificationTypeNames.identifier;
+                case 3: return ClassificationTypeNames.keyword;
+                case 4: return ClassificationTypeNames.numericLiteral;
+                case 5: return ClassificationTypeNames.operator;
+                case 6: return ClassificationTypeNames.stringLiteral;
+                case 8: return ClassificationTypeNames.whiteSpace;
+                case 9: return ClassificationTypeNames.text;
+                case 10: return ClassificationTypeNames.punctuation;
+                case 11: return ClassificationTypeNames.className;
+                case 12: return ClassificationTypeNames.enumName;
+                case 13: return ClassificationTypeNames.interfaceName;
+                case 14: return ClassificationTypeNames.moduleName;
+                case 15: return ClassificationTypeNames.typeParameterName;
+                case 16: return ClassificationTypeNames.typeAliasName;
+                case 17: return ClassificationTypeNames.parameterName;
+                case 18: return ClassificationTypeNames.docCommentTagName;
+                case 19: return ClassificationTypeNames.jsxOpenTagName;
+                case 20: return ClassificationTypeNames.jsxCloseTagName;
+                case 21: return ClassificationTypeNames.jsxSelfClosingTagName;
+                case 22: return ClassificationTypeNames.jsxAttribute;
+                case 23: return ClassificationTypeNames.jsxText;
+                case 24: return ClassificationTypeNames.jsxAttributeStringLiteralValue;
+            }
+        }
+        function convertClassifications(classifications) {
+            ts.Debug.assert(classifications.spans.length % 3 === 0);
+            var dense = classifications.spans;
+            var result = [];
+            for (var i = 0, n = dense.length; i < n; i += 3) {
+                result.push({
+                    textSpan: ts.createTextSpan(dense[i], dense[i + 1]),
+                    classificationType: getClassificationTypeName(dense[i + 2])
+                });
+            }
+            return result;
+        }
+        function getSyntacticClassifications(fileName, span) {
+            return convertClassifications(getEncodedSyntacticClassifications(fileName, span));
+        }
+        function getEncodedSyntacticClassifications(fileName, span) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            var spanStart = span.start;
+            var spanLength = span.length;
+            var triviaScanner = ts.createScanner(2, false, sourceFile.languageVariant, sourceFile.text);
+            var mergeConflictScanner = ts.createScanner(2, false, sourceFile.languageVariant, sourceFile.text);
+            var result = [];
+            processElement(sourceFile);
+            return { spans: result, endOfLineState: 0 };
+            function pushClassification(start, length, type) {
+                result.push(start);
+                result.push(length);
+                result.push(type);
+            }
+            function classifyLeadingTriviaAndGetTokenStart(token) {
+                triviaScanner.setTextPos(token.pos);
+                while (true) {
+                    var start = triviaScanner.getTextPos();
+                    if (!ts.couldStartTrivia(sourceFile.text, start)) {
+                        return start;
+                    }
+                    var kind = triviaScanner.scan();
+                    var end = triviaScanner.getTextPos();
+                    var width = end - start;
+                    if (!ts.isTrivia(kind)) {
+                        return start;
+                    }
+                    if (kind === 4 || kind === 5) {
+                        continue;
+                    }
+                    if (ts.isComment(kind)) {
+                        classifyComment(token, kind, start, width);
+                        triviaScanner.setTextPos(end);
+                        continue;
+                    }
+                    if (kind === 7) {
+                        var text = sourceFile.text;
+                        var ch = text.charCodeAt(start);
+                        if (ch === 60 || ch === 62) {
+                            pushClassification(start, width, 1);
+                            continue;
+                        }
+                        ts.Debug.assert(ch === 61);
+                        classifyDisabledMergeCode(text, start, end);
+                    }
+                }
+            }
+            function classifyComment(token, kind, start, width) {
+                if (kind === 3) {
+                    var docCommentAndDiagnostics = ts.parseIsolatedJSDocComment(sourceFile.text, start, width);
+                    if (docCommentAndDiagnostics && docCommentAndDiagnostics.jsDocComment) {
+                        docCommentAndDiagnostics.jsDocComment.parent = token;
+                        classifyJSDocComment(docCommentAndDiagnostics.jsDocComment);
+                        return;
+                    }
+                }
+                pushCommentRange(start, width);
+            }
+            function pushCommentRange(start, width) {
+                pushClassification(start, width, 1);
+            }
+            function classifyJSDocComment(docComment) {
+                var pos = docComment.pos;
+                for (var _i = 0, _a = docComment.tags; _i < _a.length; _i++) {
+                    var tag = _a[_i];
+                    if (tag.pos !== pos) {
+                        pushCommentRange(pos, tag.pos - pos);
+                    }
+                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, 10);
+                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, 18);
+                    pos = tag.tagName.end;
+                    switch (tag.kind) {
+                        case 275:
+                            processJSDocParameterTag(tag);
+                            break;
+                        case 278:
+                            processJSDocTemplateTag(tag);
+                            break;
+                        case 277:
+                            processElement(tag.typeExpression);
+                            break;
+                        case 276:
+                            processElement(tag.typeExpression);
+                            break;
+                    }
+                    pos = tag.end;
+                }
+                if (pos !== docComment.end) {
+                    pushCommentRange(pos, docComment.end - pos);
+                }
+                return;
+                function processJSDocParameterTag(tag) {
+                    if (tag.preParameterName) {
+                        pushCommentRange(pos, tag.preParameterName.pos - pos);
+                        pushClassification(tag.preParameterName.pos, tag.preParameterName.end - tag.preParameterName.pos, 17);
+                        pos = tag.preParameterName.end;
+                    }
+                    if (tag.typeExpression) {
+                        pushCommentRange(pos, tag.typeExpression.pos - pos);
+                        processElement(tag.typeExpression);
+                        pos = tag.typeExpression.end;
+                    }
+                    if (tag.postParameterName) {
+                        pushCommentRange(pos, tag.postParameterName.pos - pos);
+                        pushClassification(tag.postParameterName.pos, tag.postParameterName.end - tag.postParameterName.pos, 17);
+                        pos = tag.postParameterName.end;
+                    }
+                }
+            }
+            function processJSDocTemplateTag(tag) {
+                for (var _i = 0, _a = tag.getChildren(); _i < _a.length; _i++) {
+                    var child = _a[_i];
+                    processElement(child);
+                }
+            }
+            function classifyDisabledMergeCode(text, start, end) {
+                var i;
+                for (i = start; i < end; i++) {
+                    if (ts.isLineBreak(text.charCodeAt(i))) {
+                        break;
+                    }
+                }
+                pushClassification(start, i - start, 1);
+                mergeConflictScanner.setTextPos(i);
+                while (mergeConflictScanner.getTextPos() < end) {
+                    classifyDisabledCodeToken();
+                }
+            }
+            function classifyDisabledCodeToken() {
+                var start = mergeConflictScanner.getTextPos();
+                var tokenKind = mergeConflictScanner.scan();
+                var end = mergeConflictScanner.getTextPos();
+                var type = classifyTokenType(tokenKind);
+                if (type) {
+                    pushClassification(start, end - start, type);
+                }
+            }
+            function tryClassifyNode(node) {
+                if (ts.nodeIsMissing(node)) {
+                    return true;
+                }
+                var classifiedElementName = tryClassifyJsxElementName(node);
+                if (!ts.isToken(node) && node.kind !== 244 && classifiedElementName === undefined) {
+                    return false;
+                }
+                var tokenStart = node.kind === 244 ? node.pos : classifyLeadingTriviaAndGetTokenStart(node);
+                var tokenWidth = node.end - tokenStart;
+                ts.Debug.assert(tokenWidth >= 0);
+                if (tokenWidth > 0) {
+                    var type = classifiedElementName || classifyTokenType(node.kind, node);
+                    if (type) {
+                        pushClassification(tokenStart, tokenWidth, type);
+                    }
+                }
+                return true;
+            }
+            function tryClassifyJsxElementName(token) {
+                switch (token.parent && token.parent.kind) {
+                    case 243:
+                        if (token.parent.tagName === token) {
+                            return 19;
+                        }
+                        break;
+                    case 245:
+                        if (token.parent.tagName === token) {
+                            return 20;
+                        }
+                        break;
+                    case 242:
+                        if (token.parent.tagName === token) {
+                            return 21;
+                        }
+                        break;
+                    case 246:
+                        if (token.parent.name === token) {
+                            return 22;
+                        }
+                        break;
+                }
+                return undefined;
+            }
+            function classifyTokenType(tokenKind, token) {
+                if (ts.isKeyword(tokenKind)) {
+                    return 3;
+                }
+                if (tokenKind === 25 || tokenKind === 27) {
+                    if (token && ts.getTypeArgumentOrTypeParameterList(token.parent)) {
+                        return 10;
+                    }
+                }
+                if (ts.isPunctuation(tokenKind)) {
+                    if (token) {
+                        if (tokenKind === 56) {
+                            if (token.parent.kind === 218 ||
+                                token.parent.kind === 145 ||
+                                token.parent.kind === 142 ||
+                                token.parent.kind === 246) {
+                                return 5;
+                            }
+                        }
+                        if (token.parent.kind === 187 ||
+                            token.parent.kind === 185 ||
+                            token.parent.kind === 186 ||
+                            token.parent.kind === 188) {
+                            return 5;
+                        }
+                    }
+                    return 10;
+                }
+                else if (tokenKind === 8) {
+                    return 4;
+                }
+                else if (tokenKind === 9 || tokenKind === 166) {
+                    return token.parent.kind === 246 ? 24 : 6;
+                }
+                else if (tokenKind === 10) {
+                    return 6;
+                }
+                else if (ts.isTemplateLiteralKind(tokenKind)) {
+                    return 6;
+                }
+                else if (tokenKind === 244) {
+                    return 23;
+                }
+                else if (tokenKind === 69) {
+                    if (token) {
+                        switch (token.parent.kind) {
+                            case 221:
+                                if (token.parent.name === token) {
+                                    return 11;
+                                }
+                                return;
+                            case 141:
+                                if (token.parent.name === token) {
+                                    return 15;
+                                }
+                                return;
+                            case 222:
+                                if (token.parent.name === token) {
+                                    return 13;
+                                }
+                                return;
+                            case 224:
+                                if (token.parent.name === token) {
+                                    return 12;
+                                }
+                                return;
+                            case 225:
+                                if (token.parent.name === token) {
+                                    return 14;
+                                }
+                                return;
+                            case 142:
+                                if (token.parent.name === token) {
+                                    return 17;
+                                }
+                                return;
+                        }
+                    }
+                    return 2;
+                }
+            }
+            function processElement(element) {
+                if (!element) {
+                    return;
+                }
+                if (ts.decodedTextSpanIntersectsWith(spanStart, spanLength, element.pos, element.getFullWidth())) {
+                    checkForClassificationCancellation(element.kind);
+                    var children = element.getChildren(sourceFile);
+                    for (var i = 0, n = children.length; i < n; i++) {
+                        var child = children[i];
+                        if (!tryClassifyNode(child)) {
+                            processElement(child);
+                        }
+                    }
+                }
+            }
+        }
+        function getOutliningSpans(fileName) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.OutliningElementsCollector.collectElements(sourceFile);
+        }
+        function getBraceMatchingAtPosition(fileName, position) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            var result = [];
+            var token = ts.getTouchingToken(sourceFile, position);
+            if (token.getStart(sourceFile) === position) {
+                var matchKind = getMatchingTokenKind(token);
+                if (matchKind) {
+                    var parentElement = token.parent;
+                    var childNodes = parentElement.getChildren(sourceFile);
+                    for (var _i = 0, childNodes_1 = childNodes; _i < childNodes_1.length; _i++) {
+                        var current = childNodes_1[_i];
+                        if (current.kind === matchKind) {
+                            var range1 = ts.createTextSpan(token.getStart(sourceFile), token.getWidth(sourceFile));
+                            var range2 = ts.createTextSpan(current.getStart(sourceFile), current.getWidth(sourceFile));
+                            if (range1.start < range2.start) {
+                                result.push(range1, range2);
+                            }
+                            else {
+                                result.push(range2, range1);
+                            }
+                            break;
+                        }
+                    }
+                }
+            }
+            return result;
+            function getMatchingTokenKind(token) {
+                switch (token.kind) {
+                    case 15: return 16;
+                    case 17: return 18;
+                    case 19: return 20;
+                    case 25: return 27;
+                    case 16: return 15;
+                    case 18: return 17;
+                    case 20: return 19;
+                    case 27: return 25;
+                }
+                return undefined;
+            }
+        }
+        function getIndentationAtPosition(fileName, position, editorOptions) {
+            var start = new Date().getTime();
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            log("getIndentationAtPosition: getCurrentSourceFile: " + (new Date().getTime() - start));
+            start = new Date().getTime();
+            var result = ts.formatting.SmartIndenter.getIndentation(position, sourceFile, editorOptions);
+            log("getIndentationAtPosition: computeIndentation  : " + (new Date().getTime() - start));
+            return result;
+        }
+        function getFormattingEditsForRange(fileName, start, end, options) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.formatting.formatSelection(start, end, sourceFile, getRuleProvider(options), options);
+        }
+        function getFormattingEditsForDocument(fileName, options) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.formatting.formatDocument(sourceFile, getRuleProvider(options), options);
+        }
+        function getFormattingEditsAfterKeystroke(fileName, position, key, options) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            if (key === "}") {
+                return ts.formatting.formatOnClosingCurly(position, sourceFile, getRuleProvider(options), options);
+            }
+            else if (key === ";") {
+                return ts.formatting.formatOnSemicolon(position, sourceFile, getRuleProvider(options), options);
+            }
+            else if (key === "\n") {
+                return ts.formatting.formatOnEnter(position, sourceFile, getRuleProvider(options), options);
+            }
+            return [];
+        }
+        function getDocCommentTemplateAtPosition(fileName, position) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position) || ts.hasDocComment(sourceFile, position)) {
+                return undefined;
+            }
+            var tokenAtPos = ts.getTokenAtPosition(sourceFile, position);
+            var tokenStart = tokenAtPos.getStart();
+            if (!tokenAtPos || tokenStart < position) {
+                return undefined;
+            }
+            var commentOwner;
+            findOwner: for (commentOwner = tokenAtPos; commentOwner; commentOwner = commentOwner.parent) {
+                switch (commentOwner.kind) {
+                    case 220:
+                    case 147:
+                    case 148:
+                    case 221:
+                    case 200:
+                        break findOwner;
+                    case 256:
+                        return undefined;
+                    case 225:
+                        if (commentOwner.parent.kind === 225) {
+                            return undefined;
+                        }
+                        break findOwner;
+                }
+            }
+            if (!commentOwner || commentOwner.getStart() < position) {
+                return undefined;
+            }
+            var parameters = getParametersForJsDocOwningNode(commentOwner);
+            var posLineAndChar = sourceFile.getLineAndCharacterOfPosition(position);
+            var lineStart = sourceFile.getLineStarts()[posLineAndChar.line];
+            var indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character);
+            var newLine = ts.getNewLineOrDefaultFromHost(host);
+            var docParams = "";
+            for (var i = 0, numParams = parameters.length; i < numParams; i++) {
+                var currentName = parameters[i].name;
+                var paramName = currentName.kind === 69 ?
+                    currentName.text :
+                    "param" + i;
+                docParams += indentationStr + " * @param " + paramName + newLine;
+            }
+            var preamble = "/**" + newLine +
+                indentationStr + " * ";
+            var result = preamble + newLine +
+                docParams +
+                indentationStr + " */" +
+                (tokenStart === position ? newLine + indentationStr : "");
+            return { newText: result, caretOffset: preamble.length };
+        }
+        function isValidBraceCompletionAtPostion(fileName, position, openingBrace) {
+            if (openingBrace === 60) {
+                return false;
+            }
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position)) {
+                return false;
+            }
+            if (ts.isInsideJsxElementOrAttribute(sourceFile, position)) {
+                return openingBrace === 123;
+            }
+            if (ts.isInTemplateString(sourceFile, position)) {
+                return false;
+            }
+            return true;
+        }
+        function getParametersForJsDocOwningNode(commentOwner) {
+            if (ts.isFunctionLike(commentOwner)) {
+                return commentOwner.parameters;
+            }
+            if (commentOwner.kind === 200) {
+                var varStatement = commentOwner;
+                var varDeclarations = varStatement.declarationList.declarations;
+                if (varDeclarations.length === 1 && varDeclarations[0].initializer) {
+                    return getParametersFromRightHandSideOfAssignment(varDeclarations[0].initializer);
+                }
+            }
+            return emptyArray;
+        }
+        function getParametersFromRightHandSideOfAssignment(rightHandSide) {
+            while (rightHandSide.kind === 178) {
+                rightHandSide = rightHandSide.expression;
+            }
+            switch (rightHandSide.kind) {
+                case 179:
+                case 180:
+                    return rightHandSide.parameters;
+                case 192:
+                    for (var _i = 0, _a = rightHandSide.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        if (member.kind === 148) {
+                            return member.parameters;
+                        }
+                    }
+                    break;
+            }
+            return emptyArray;
+        }
+        function getTodoComments(fileName, descriptors) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            cancellationToken.throwIfCancellationRequested();
+            var fileContents = sourceFile.text;
+            var result = [];
+            if (descriptors.length > 0) {
+                var regExp = getTodoCommentsRegExp();
+                var matchArray = void 0;
+                while (matchArray = regExp.exec(fileContents)) {
+                    cancellationToken.throwIfCancellationRequested();
+                    var firstDescriptorCaptureIndex = 3;
+                    ts.Debug.assert(matchArray.length === descriptors.length + firstDescriptorCaptureIndex);
+                    var preamble = matchArray[1];
+                    var matchPosition = matchArray.index + preamble.length;
+                    var token = ts.getTokenAtPosition(sourceFile, matchPosition);
+                    if (!isInsideComment(sourceFile, token, matchPosition)) {
+                        continue;
+                    }
+                    var descriptor = undefined;
+                    for (var i = 0, n = descriptors.length; i < n; i++) {
+                        if (matchArray[i + firstDescriptorCaptureIndex]) {
+                            descriptor = descriptors[i];
+                        }
+                    }
+                    ts.Debug.assert(descriptor !== undefined);
+                    if (isLetterOrDigit(fileContents.charCodeAt(matchPosition + descriptor.text.length))) {
+                        continue;
+                    }
+                    var message = matchArray[2];
+                    result.push({
+                        descriptor: descriptor,
+                        message: message,
+                        position: matchPosition
+                    });
+                }
+            }
+            return result;
+            function escapeRegExp(str) {
+                return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
+            }
+            function getTodoCommentsRegExp() {
+                var singleLineCommentStart = /(?:\/\/+\s*)/.source;
+                var multiLineCommentStart = /(?:\/\*+\s*)/.source;
+                var anyNumberOfSpacesAndAsterisksAtStartOfLine = /(?:^(?:\s|\*)*)/.source;
+                var preamble = "(" + anyNumberOfSpacesAndAsterisksAtStartOfLine + "|" + singleLineCommentStart + "|" + multiLineCommentStart + ")";
+                var literals = "(?:" + ts.map(descriptors, function (d) { return "(" + escapeRegExp(d.text) + ")"; }).join("|") + ")";
+                var endOfLineOrEndOfComment = /(?:$|\*\/)/.source;
+                var messageRemainder = /(?:.*?)/.source;
+                var messagePortion = "(" + literals + messageRemainder + ")";
+                var regExpString = preamble + messagePortion + endOfLineOrEndOfComment;
+                return new RegExp(regExpString, "gim");
+            }
+            function isLetterOrDigit(char) {
+                return (char >= 97 && char <= 122) ||
+                    (char >= 65 && char <= 90) ||
+                    (char >= 48 && char <= 57);
+            }
+        }
+        function getStringLiteralTypeForNode(node, typeChecker) {
+            var searchNode = node.parent.kind === 166 ? node.parent : node;
+            var type = typeChecker.getTypeAtLocation(searchNode);
+            if (type && type.flags & 256) {
+                return type;
+            }
+            return undefined;
+        }
+        function getRenameInfo(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var typeChecker = program.getTypeChecker();
+            var defaultLibFileName = host.getDefaultLibFileName(host.getCompilationSettings());
+            var canonicalDefaultLibName = getCanonicalFileName(ts.normalizePath(defaultLibFileName));
+            var node = ts.getTouchingWord(sourceFile, position, true);
+            if (node) {
+                if (node.kind === 69 ||
+                    node.kind === 9 ||
+                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                    var symbol = typeChecker.getSymbolAtLocation(node);
+                    if (symbol) {
+                        var declarations = symbol.getDeclarations();
+                        if (declarations && declarations.length > 0) {
+                            if (ts.forEach(declarations, isDefinedInLibraryFile)) {
+                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
+                            }
+                            var displayName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
+                            var kind = getSymbolKind(symbol, node);
+                            if (kind) {
+                                return {
+                                    canRename: true,
+                                    kind: kind,
+                                    displayName: displayName,
+                                    localizedErrorMessage: undefined,
+                                    fullDisplayName: typeChecker.getFullyQualifiedName(symbol),
+                                    kindModifiers: getSymbolModifiers(symbol),
+                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
+                                };
+                            }
+                        }
+                    }
+                    else if (node.kind === 9) {
+                        var type = getStringLiteralTypeForNode(node, typeChecker);
+                        if (type) {
+                            if (isDefinedInLibraryFile(node)) {
+                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
+                            }
+                            else {
+                                var displayName = ts.stripQuotes(type.text);
+                                return {
+                                    canRename: true,
+                                    kind: ScriptElementKind.variableElement,
+                                    displayName: displayName,
+                                    localizedErrorMessage: undefined,
+                                    fullDisplayName: displayName,
+                                    kindModifiers: ScriptElementKindModifier.none,
+                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
+                                };
+                            }
+                        }
+                    }
+                }
+            }
+            return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_this_element));
+            function getRenameInfoError(localizedErrorMessage) {
+                return {
+                    canRename: false,
+                    localizedErrorMessage: localizedErrorMessage,
+                    displayName: undefined,
+                    fullDisplayName: undefined,
+                    kind: undefined,
+                    kindModifiers: undefined,
+                    triggerSpan: undefined
+                };
+            }
+            function isDefinedInLibraryFile(declaration) {
+                if (defaultLibFileName) {
+                    var sourceFile_2 = declaration.getSourceFile();
+                    var canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile_2.fileName));
+                    if (canonicalName === canonicalDefaultLibName) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function createTriggerSpanForNode(node, sourceFile) {
+                var start = node.getStart(sourceFile);
+                var width = node.getWidth(sourceFile);
+                if (node.kind === 9) {
+                    start += 1;
+                    width -= 2;
+                }
+                return ts.createTextSpan(start, width);
+            }
+        }
+        return {
+            dispose: dispose,
+            cleanupSemanticCache: cleanupSemanticCache,
+            getSyntacticDiagnostics: getSyntacticDiagnostics,
+            getSemanticDiagnostics: getSemanticDiagnostics,
+            getCompilerOptionsDiagnostics: getCompilerOptionsDiagnostics,
+            getSyntacticClassifications: getSyntacticClassifications,
+            getSemanticClassifications: getSemanticClassifications,
+            getEncodedSyntacticClassifications: getEncodedSyntacticClassifications,
+            getEncodedSemanticClassifications: getEncodedSemanticClassifications,
+            getCompletionsAtPosition: getCompletionsAtPosition,
+            getCompletionEntryDetails: getCompletionEntryDetails,
+            getSignatureHelpItems: getSignatureHelpItems,
+            getQuickInfoAtPosition: getQuickInfoAtPosition,
+            getDefinitionAtPosition: getDefinitionAtPosition,
+            getTypeDefinitionAtPosition: getTypeDefinitionAtPosition,
+            getReferencesAtPosition: getReferencesAtPosition,
+            findReferences: findReferences,
+            getOccurrencesAtPosition: getOccurrencesAtPosition,
+            getDocumentHighlights: getDocumentHighlights,
+            getNameOrDottedNameSpan: getNameOrDottedNameSpan,
+            getBreakpointStatementAtPosition: getBreakpointStatementAtPosition,
+            getNavigateToItems: getNavigateToItems,
+            getRenameInfo: getRenameInfo,
+            findRenameLocations: findRenameLocations,
+            getNavigationBarItems: getNavigationBarItems,
+            getOutliningSpans: getOutliningSpans,
+            getTodoComments: getTodoComments,
+            getBraceMatchingAtPosition: getBraceMatchingAtPosition,
+            getIndentationAtPosition: getIndentationAtPosition,
+            getFormattingEditsForRange: getFormattingEditsForRange,
+            getFormattingEditsForDocument: getFormattingEditsForDocument,
+            getFormattingEditsAfterKeystroke: getFormattingEditsAfterKeystroke,
+            getDocCommentTemplateAtPosition: getDocCommentTemplateAtPosition,
+            isValidBraceCompletionAtPostion: isValidBraceCompletionAtPostion,
+            getEmitOutput: getEmitOutput,
+            getNonBoundSourceFile: getNonBoundSourceFile,
+            getProgram: getProgram
+        };
+    }
+    ts.createLanguageService = createLanguageService;
+    function getNameTable(sourceFile) {
+        if (!sourceFile.nameTable) {
+            initializeNameTable(sourceFile);
+        }
+        return sourceFile.nameTable;
+    }
+    ts.getNameTable = getNameTable;
+    function initializeNameTable(sourceFile) {
+        var nameTable = {};
+        walk(sourceFile);
+        sourceFile.nameTable = nameTable;
+        function walk(node) {
+            switch (node.kind) {
+                case 69:
+                    nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
+                    break;
+                case 9:
+                case 8:
+                    if (ts.isDeclarationName(node) ||
+                        node.parent.kind === 240 ||
+                        isArgumentOfElementAccessExpression(node) ||
+                        ts.isLiteralComputedPropertyDeclarationName(node)) {
+                        nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
+                    }
+                    break;
+                default:
+                    ts.forEachChild(node, walk);
+                    if (node.jsDocComments) {
+                        for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                            var jsDocComment = _a[_i];
+                            ts.forEachChild(jsDocComment, walk);
+                        }
+                    }
+            }
+        }
+    }
+    function isArgumentOfElementAccessExpression(node) {
+        return node &&
+            node.parent &&
+            node.parent.kind === 173 &&
+            node.parent.argumentExpression === node;
+    }
+    function createClassifier() {
+        var scanner = ts.createScanner(2, false);
+        var noRegexTable = [];
+        noRegexTable[69] = true;
+        noRegexTable[9] = true;
+        noRegexTable[8] = true;
+        noRegexTable[10] = true;
+        noRegexTable[97] = true;
+        noRegexTable[41] = true;
+        noRegexTable[42] = true;
+        noRegexTable[18] = true;
+        noRegexTable[20] = true;
+        noRegexTable[16] = true;
+        noRegexTable[99] = true;
+        noRegexTable[84] = true;
+        var templateStack = [];
+        function canFollow(keyword1, keyword2) {
+            if (ts.isAccessibilityModifier(keyword1)) {
+                if (keyword2 === 123 ||
+                    keyword2 === 131 ||
+                    keyword2 === 121 ||
+                    keyword2 === 113) {
+                    return true;
+                }
+                return false;
+            }
+            return true;
+        }
+        function convertClassifications(classifications, text) {
+            var entries = [];
+            var dense = classifications.spans;
+            var lastEnd = 0;
+            for (var i = 0, n = dense.length; i < n; i += 3) {
+                var start = dense[i];
+                var length_3 = dense[i + 1];
+                var type = dense[i + 2];
+                if (lastEnd >= 0) {
+                    var whitespaceLength_1 = start - lastEnd;
+                    if (whitespaceLength_1 > 0) {
+                        entries.push({ length: whitespaceLength_1, classification: TokenClass.Whitespace });
+                    }
+                }
+                entries.push({ length: length_3, classification: convertClassification(type) });
+                lastEnd = start + length_3;
+            }
+            var whitespaceLength = text.length - lastEnd;
+            if (whitespaceLength > 0) {
+                entries.push({ length: whitespaceLength, classification: TokenClass.Whitespace });
+            }
+            return { entries: entries, finalLexState: classifications.endOfLineState };
+        }
+        function convertClassification(type) {
+            switch (type) {
+                case 1: return TokenClass.Comment;
+                case 3: return TokenClass.Keyword;
+                case 4: return TokenClass.NumberLiteral;
+                case 5: return TokenClass.Operator;
+                case 6: return TokenClass.StringLiteral;
+                case 8: return TokenClass.Whitespace;
+                case 10: return TokenClass.Punctuation;
+                case 2:
+                case 11:
+                case 12:
+                case 13:
+                case 14:
+                case 15:
+                case 16:
+                case 9:
+                case 17:
+                default:
+                    return TokenClass.Identifier;
+            }
+        }
+        function getClassificationsForLine(text, lexState, syntacticClassifierAbsent) {
+            return convertClassifications(getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent), text);
+        }
+        function getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent) {
+            var offset = 0;
+            var token = 0;
+            var lastNonTriviaToken = 0;
+            while (templateStack.length > 0) {
+                templateStack.pop();
+            }
+            switch (lexState) {
+                case 3:
+                    text = "\"\\\n" + text;
+                    offset = 3;
+                    break;
+                case 2:
+                    text = "'\\\n" + text;
+                    offset = 3;
+                    break;
+                case 1:
+                    text = "/*\n" + text;
+                    offset = 3;
+                    break;
+                case 4:
+                    text = "`\n" + text;
+                    offset = 2;
+                    break;
+                case 5:
+                    text = "}\n" + text;
+                    offset = 2;
+                case 6:
+                    templateStack.push(12);
+                    break;
+            }
+            scanner.setText(text);
+            var result = {
+                endOfLineState: 0,
+                spans: []
+            };
+            var angleBracketStack = 0;
+            do {
+                token = scanner.scan();
+                if (!ts.isTrivia(token)) {
+                    if ((token === 39 || token === 61) && !noRegexTable[lastNonTriviaToken]) {
+                        if (scanner.reScanSlashToken() === 10) {
+                            token = 10;
+                        }
+                    }
+                    else if (lastNonTriviaToken === 21 && isKeyword(token)) {
+                        token = 69;
+                    }
+                    else if (isKeyword(lastNonTriviaToken) && isKeyword(token) && !canFollow(lastNonTriviaToken, token)) {
+                        token = 69;
+                    }
+                    else if (lastNonTriviaToken === 69 &&
+                        token === 25) {
+                        angleBracketStack++;
+                    }
+                    else if (token === 27 && angleBracketStack > 0) {
+                        angleBracketStack--;
+                    }
+                    else if (token === 117 ||
+                        token === 132 ||
+                        token === 130 ||
+                        token === 120 ||
+                        token === 133) {
+                        if (angleBracketStack > 0 && !syntacticClassifierAbsent) {
+                            token = 69;
+                        }
+                    }
+                    else if (token === 12) {
+                        templateStack.push(token);
+                    }
+                    else if (token === 15) {
+                        if (templateStack.length > 0) {
+                            templateStack.push(token);
+                        }
+                    }
+                    else if (token === 16) {
+                        if (templateStack.length > 0) {
+                            var lastTemplateStackToken = ts.lastOrUndefined(templateStack);
+                            if (lastTemplateStackToken === 12) {
+                                token = scanner.reScanTemplateToken();
+                                if (token === 14) {
+                                    templateStack.pop();
+                                }
+                                else {
+                                    ts.Debug.assert(token === 13, "Should have been a template middle. Was " + token);
+                                }
+                            }
+                            else {
+                                ts.Debug.assert(lastTemplateStackToken === 15, "Should have been an open brace. Was: " + token);
+                                templateStack.pop();
+                            }
+                        }
+                    }
+                    lastNonTriviaToken = token;
+                }
+                processToken();
+            } while (token !== 1);
+            return result;
+            function processToken() {
+                var start = scanner.getTokenPos();
+                var end = scanner.getTextPos();
+                addResult(start, end, classFromKind(token));
+                if (end >= text.length) {
+                    if (token === 9 || token === 166) {
+                        var tokenText = scanner.getTokenText();
+                        if (scanner.isUnterminated()) {
+                            var lastCharIndex = tokenText.length - 1;
+                            var numBackslashes = 0;
+                            while (tokenText.charCodeAt(lastCharIndex - numBackslashes) === 92) {
+                                numBackslashes++;
+                            }
+                            if (numBackslashes & 1) {
+                                var quoteChar = tokenText.charCodeAt(0);
+                                result.endOfLineState = quoteChar === 34
+                                    ? 3
+                                    : 2;
+                            }
+                        }
+                    }
+                    else if (token === 3) {
+                        if (scanner.isUnterminated()) {
+                            result.endOfLineState = 1;
+                        }
+                    }
+                    else if (ts.isTemplateLiteralKind(token)) {
+                        if (scanner.isUnterminated()) {
+                            if (token === 14) {
+                                result.endOfLineState = 5;
+                            }
+                            else if (token === 11) {
+                                result.endOfLineState = 4;
+                            }
+                            else {
+                                ts.Debug.fail("Only 'NoSubstitutionTemplateLiteral's and 'TemplateTail's can be unterminated; got SyntaxKind #" + token);
+                            }
+                        }
+                    }
+                    else if (templateStack.length > 0 && ts.lastOrUndefined(templateStack) === 12) {
+                        result.endOfLineState = 6;
+                    }
+                }
+            }
+            function addResult(start, end, classification) {
+                if (classification === 8) {
+                    return;
+                }
+                if (start === 0 && offset > 0) {
+                    start += offset;
+                }
+                start -= offset;
+                end -= offset;
+                var length = end - start;
+                if (length > 0) {
+                    result.spans.push(start);
+                    result.spans.push(length);
+                    result.spans.push(classification);
+                }
+            }
+        }
+        function isBinaryExpressionOperatorToken(token) {
+            switch (token) {
+                case 37:
+                case 39:
+                case 40:
+                case 35:
+                case 36:
+                case 43:
+                case 44:
+                case 45:
+                case 25:
+                case 27:
+                case 28:
+                case 29:
+                case 91:
+                case 90:
+                case 116:
+                case 30:
+                case 31:
+                case 32:
+                case 33:
+                case 46:
+                case 48:
+                case 47:
+                case 51:
+                case 52:
+                case 67:
+                case 66:
+                case 68:
+                case 63:
+                case 64:
+                case 65:
+                case 57:
+                case 58:
+                case 59:
+                case 61:
+                case 62:
+                case 56:
+                case 24:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isPrefixUnaryExpressionOperatorToken(token) {
+            switch (token) {
+                case 35:
+                case 36:
+                case 50:
+                case 49:
+                case 41:
+                case 42:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isKeyword(token) {
+            return token >= 70 && token <= 138;
+        }
+        function classFromKind(token) {
+            if (isKeyword(token)) {
+                return 3;
+            }
+            else if (isBinaryExpressionOperatorToken(token) || isPrefixUnaryExpressionOperatorToken(token)) {
+                return 5;
+            }
+            else if (token >= 15 && token <= 68) {
+                return 10;
+            }
+            switch (token) {
+                case 8:
+                    return 4;
+                case 9:
+                case 166:
+                    return 6;
+                case 10:
+                    return 7;
+                case 7:
+                case 3:
+                case 2:
+                    return 1;
+                case 5:
+                case 4:
+                    return 8;
+                case 69:
+                default:
+                    if (ts.isTemplateLiteralKind(token)) {
+                        return 6;
+                    }
+                    return 2;
+            }
+        }
+        return {
+            getClassificationsForLine: getClassificationsForLine,
+            getEncodedLexicalClassifications: getEncodedLexicalClassifications
+        };
+    }
+    ts.createClassifier = createClassifier;
+    function getDefaultLibFilePath(options) {
+        if (typeof __dirname !== "undefined") {
+            return __dirname + ts.directorySeparator + ts.getDefaultLibFileName(options);
+        }
+        throw new Error("getDefaultLibFilePath is only supported when consumed as a node module. ");
+    }
+    ts.getDefaultLibFilePath = getDefaultLibFilePath;
+    function initializeServices() {
+        ts.objectAllocator = {
+            getNodeConstructor: function () { return NodeObject; },
+            getSourceFileConstructor: function () { return SourceFileObject; },
+            getSymbolConstructor: function () { return SymbolObject; },
+            getTypeConstructor: function () { return TypeObject; },
+            getSignatureConstructor: function () { return SignatureObject; }
+        };
+    }
+    initializeServices();
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var server;
+    (function (server) {
+        var spaceCache = [];
+        function generateSpaces(n) {
+            if (!spaceCache[n]) {
+                var strBuilder = "";
+                for (var i = 0; i < n; i++) {
+                    strBuilder += " ";
+                }
+                spaceCache[n] = strBuilder;
+            }
+            return spaceCache[n];
+        }
+        server.generateSpaces = generateSpaces;
+        function generateIndentString(n, editorOptions) {
+            if (editorOptions.ConvertTabsToSpaces) {
+                return generateSpaces(n);
+            }
+            else {
+                var result = "";
+                for (var i = 0; i < Math.floor(n / editorOptions.TabSize); i++) {
+                    result += "\t";
+                }
+                for (var i = 0; i < n % editorOptions.TabSize; i++) {
+                    result += " ";
+                }
+                return result;
+            }
+        }
+        server.generateIndentString = generateIndentString;
+        function compareNumber(a, b) {
+            if (a < b) {
+                return -1;
+            }
+            else if (a === b) {
+                return 0;
+            }
+            else
+                return 1;
+        }
+        function compareFileStart(a, b) {
+            if (a.file < b.file) {
+                return -1;
+            }
+            else if (a.file == b.file) {
+                var n = compareNumber(a.start.line, b.start.line);
+                if (n === 0) {
+                    return compareNumber(a.start.offset, b.start.offset);
+                }
+                else
+                    return n;
+            }
+            else {
+                return 1;
+            }
+        }
+        function formatDiag(fileName, project, diag) {
+            return {
+                start: project.compilerService.host.positionToLineOffset(fileName, diag.start),
+                end: project.compilerService.host.positionToLineOffset(fileName, diag.start + diag.length),
+                text: ts.flattenDiagnosticMessageText(diag.messageText, "\n")
+            };
+        }
+        function formatConfigFileDiag(diag) {
+            return {
+                start: undefined,
+                end: undefined,
+                text: ts.flattenDiagnosticMessageText(diag.messageText, "\n")
+            };
+        }
+        function allEditsBeforePos(edits, pos) {
+            for (var i = 0, len = edits.length; i < len; i++) {
+                if (ts.textSpanEnd(edits[i].span) >= pos) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        var CommandNames;
+        (function (CommandNames) {
+            CommandNames.Brace = "brace";
+            CommandNames.Change = "change";
+            CommandNames.Close = "close";
+            CommandNames.Completions = "completions";
+            CommandNames.CompletionDetails = "completionEntryDetails";
+            CommandNames.Configure = "configure";
+            CommandNames.Definition = "definition";
+            CommandNames.Exit = "exit";
+            CommandNames.Format = "format";
+            CommandNames.Formatonkey = "formatonkey";
+            CommandNames.Geterr = "geterr";
+            CommandNames.GeterrForProject = "geterrForProject";
+            CommandNames.NavBar = "navbar";
+            CommandNames.Navto = "navto";
+            CommandNames.Occurrences = "occurrences";
+            CommandNames.DocumentHighlights = "documentHighlights";
+            CommandNames.Open = "open";
+            CommandNames.Quickinfo = "quickinfo";
+            CommandNames.References = "references";
+            CommandNames.Reload = "reload";
+            CommandNames.Rename = "rename";
+            CommandNames.Saveto = "saveto";
+            CommandNames.SignatureHelp = "signatureHelp";
+            CommandNames.TypeDefinition = "typeDefinition";
+            CommandNames.ProjectInfo = "projectInfo";
+            CommandNames.ReloadProjects = "reloadProjects";
+            CommandNames.Unknown = "unknown";
+        })(CommandNames = server.CommandNames || (server.CommandNames = {}));
+        var Errors;
+        (function (Errors) {
+            Errors.NoProject = new Error("No Project.");
+        })(Errors || (Errors = {}));
+        var Session = (function () {
+            function Session(host, byteLength, hrtime, logger) {
+                var _this = this;
+                this.host = host;
+                this.byteLength = byteLength;
+                this.hrtime = hrtime;
+                this.logger = logger;
+                this.changeSeq = 0;
+                this.handlers = (_a = {},
+                    _a[CommandNames.Exit] = function () {
+                        _this.exit();
+                        return { responseRequired: false };
+                    },
+                    _a[CommandNames.Definition] = function (request) {
+                        var defArgs = request.arguments;
+                        return { response: _this.getDefinition(defArgs.line, defArgs.offset, defArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.TypeDefinition] = function (request) {
+                        var defArgs = request.arguments;
+                        return { response: _this.getTypeDefinition(defArgs.line, defArgs.offset, defArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.References] = function (request) {
+                        var defArgs = request.arguments;
+                        return { response: _this.getReferences(defArgs.line, defArgs.offset, defArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.Rename] = function (request) {
+                        var renameArgs = request.arguments;
+                        return { response: _this.getRenameLocations(renameArgs.line, renameArgs.offset, renameArgs.file, renameArgs.findInComments, renameArgs.findInStrings), responseRequired: true };
+                    },
+                    _a[CommandNames.Open] = function (request) {
+                        var openArgs = request.arguments;
+                        var scriptKind;
+                        switch (openArgs.scriptKindName) {
+                            case "TS":
+                                scriptKind = 3;
+                                break;
+                            case "JS":
+                                scriptKind = 1;
+                                break;
+                            case "TSX":
+                                scriptKind = 4;
+                                break;
+                            case "JSX":
+                                scriptKind = 2;
+                                break;
+                        }
+                        _this.openClientFile(openArgs.file, openArgs.fileContent, scriptKind);
+                        return { responseRequired: false };
+                    },
+                    _a[CommandNames.Quickinfo] = function (request) {
+                        var quickinfoArgs = request.arguments;
+                        return { response: _this.getQuickInfo(quickinfoArgs.line, quickinfoArgs.offset, quickinfoArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.Format] = function (request) {
+                        var formatArgs = request.arguments;
+                        return { response: _this.getFormattingEditsForRange(formatArgs.line, formatArgs.offset, formatArgs.endLine, formatArgs.endOffset, formatArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.Formatonkey] = function (request) {
+                        var formatOnKeyArgs = request.arguments;
+                        return { response: _this.getFormattingEditsAfterKeystroke(formatOnKeyArgs.line, formatOnKeyArgs.offset, formatOnKeyArgs.key, formatOnKeyArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.Completions] = function (request) {
+                        var completionsArgs = request.arguments;
+                        return { response: _this.getCompletions(completionsArgs.line, completionsArgs.offset, completionsArgs.prefix, completionsArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.CompletionDetails] = function (request) {
+                        var completionDetailsArgs = request.arguments;
+                        return {
+                            response: _this.getCompletionEntryDetails(completionDetailsArgs.line, completionDetailsArgs.offset, completionDetailsArgs.entryNames, completionDetailsArgs.file), responseRequired: true
+                        };
+                    },
+                    _a[CommandNames.SignatureHelp] = function (request) {
+                        var signatureHelpArgs = request.arguments;
+                        return { response: _this.getSignatureHelpItems(signatureHelpArgs.line, signatureHelpArgs.offset, signatureHelpArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.Geterr] = function (request) {
+                        var geterrArgs = request.arguments;
+                        return { response: _this.getDiagnostics(geterrArgs.delay, geterrArgs.files), responseRequired: false };
+                    },
+                    _a[CommandNames.GeterrForProject] = function (request) {
+                        var _a = request.arguments, file = _a.file, delay = _a.delay;
+                        return { response: _this.getDiagnosticsForProject(delay, file), responseRequired: false };
+                    },
+                    _a[CommandNames.Change] = function (request) {
+                        var changeArgs = request.arguments;
+                        _this.change(changeArgs.line, changeArgs.offset, changeArgs.endLine, changeArgs.endOffset, changeArgs.insertString, changeArgs.file);
+                        return { responseRequired: false };
+                    },
+                    _a[CommandNames.Configure] = function (request) {
+                        var configureArgs = request.arguments;
+                        _this.projectService.setHostConfiguration(configureArgs);
+                        _this.output(undefined, CommandNames.Configure, request.seq);
+                        return { responseRequired: false };
+                    },
+                    _a[CommandNames.Reload] = function (request) {
+                        var reloadArgs = request.arguments;
+                        _this.reload(reloadArgs.file, reloadArgs.tmpfile, request.seq);
+                        return { response: { reloadFinished: true }, responseRequired: true };
+                    },
+                    _a[CommandNames.Saveto] = function (request) {
+                        var savetoArgs = request.arguments;
+                        _this.saveToTmp(savetoArgs.file, savetoArgs.tmpfile);
+                        return { responseRequired: false };
+                    },
+                    _a[CommandNames.Close] = function (request) {
+                        var closeArgs = request.arguments;
+                        _this.closeClientFile(closeArgs.file);
+                        return { responseRequired: false };
+                    },
+                    _a[CommandNames.Navto] = function (request) {
+                        var navtoArgs = request.arguments;
+                        return { response: _this.getNavigateToItems(navtoArgs.searchValue, navtoArgs.file, navtoArgs.maxResultCount), responseRequired: true };
+                    },
+                    _a[CommandNames.Brace] = function (request) {
+                        var braceArguments = request.arguments;
+                        return { response: _this.getBraceMatching(braceArguments.line, braceArguments.offset, braceArguments.file), responseRequired: true };
+                    },
+                    _a[CommandNames.NavBar] = function (request) {
+                        var navBarArgs = request.arguments;
+                        return { response: _this.getNavigationBarItems(navBarArgs.file), responseRequired: true };
+                    },
+                    _a[CommandNames.Occurrences] = function (request) {
+                        var _a = request.arguments, line = _a.line, offset = _a.offset, fileName = _a.file;
+                        return { response: _this.getOccurrences(line, offset, fileName), responseRequired: true };
+                    },
+                    _a[CommandNames.DocumentHighlights] = function (request) {
+                        var _a = request.arguments, line = _a.line, offset = _a.offset, fileName = _a.file, filesToSearch = _a.filesToSearch;
+                        return { response: _this.getDocumentHighlights(line, offset, fileName, filesToSearch), responseRequired: true };
+                    },
+                    _a[CommandNames.ProjectInfo] = function (request) {
+                        var _a = request.arguments, file = _a.file, needFileNameList = _a.needFileNameList;
+                        return { response: _this.getProjectInfo(file, needFileNameList), responseRequired: true };
+                    },
+                    _a[CommandNames.ReloadProjects] = function (request) {
+                        _this.reloadProjects();
+                        return { responseRequired: false };
+                    },
+                    _a
+                );
+                this.projectService =
+                    new server.ProjectService(host, logger, function (eventName, project, fileName) {
+                        _this.handleEvent(eventName, project, fileName);
+                    });
+                var _a;
+            }
+            Session.prototype.handleEvent = function (eventName, project, fileName) {
+                var _this = this;
+                if (eventName == "context") {
+                    this.projectService.log("got context event, updating diagnostics for" + fileName, "Info");
+                    this.updateErrorCheck([{ fileName: fileName, project: project }], this.changeSeq, function (n) { return n === _this.changeSeq; }, 100);
+                }
+            };
+            Session.prototype.logError = function (err, cmd) {
+                var typedErr = err;
+                var msg = "Exception on executing command " + cmd;
+                if (typedErr.message) {
+                    msg += ":\n" + typedErr.message;
+                    if (typedErr.stack) {
+                        msg += "\n" + typedErr.stack;
+                    }
+                }
+                this.projectService.log(msg);
+            };
+            Session.prototype.sendLineToClient = function (line) {
+                this.host.write(line + this.host.newLine);
+            };
+            Session.prototype.send = function (msg) {
+                var json = JSON.stringify(msg);
+                if (this.logger.isVerbose()) {
+                    this.logger.info(msg.type + ": " + json);
+                }
+                this.sendLineToClient("Content-Length: " + (1 + this.byteLength(json, "utf8")) +
+                    "\r\n\r\n" + json);
+            };
+            Session.prototype.configFileDiagnosticEvent = function (triggerFile, configFile, diagnostics) {
+                var bakedDiags = ts.map(diagnostics, formatConfigFileDiag);
+                var ev = {
+                    seq: 0,
+                    type: "event",
+                    event: "configFileDiag",
+                    body: {
+                        triggerFile: triggerFile,
+                        configFile: configFile,
+                        diagnostics: bakedDiags
+                    }
+                };
+                this.send(ev);
+            };
+            Session.prototype.event = function (info, eventName) {
+                var ev = {
+                    seq: 0,
+                    type: "event",
+                    event: eventName,
+                    body: info
+                };
+                this.send(ev);
+            };
+            Session.prototype.response = function (info, cmdName, reqSeq, errorMsg) {
+                if (reqSeq === void 0) { reqSeq = 0; }
+                var res = {
+                    seq: 0,
+                    type: "response",
+                    command: cmdName,
+                    request_seq: reqSeq,
+                    success: !errorMsg
+                };
+                if (!errorMsg) {
+                    res.body = info;
+                }
+                else {
+                    res.message = errorMsg;
+                }
+                this.send(res);
+            };
+            Session.prototype.output = function (body, commandName, requestSequence, errorMessage) {
+                if (requestSequence === void 0) { requestSequence = 0; }
+                this.response(body, commandName, requestSequence, errorMessage);
+            };
+            Session.prototype.semanticCheck = function (file, project) {
+                try {
+                    var diags = project.compilerService.languageService.getSemanticDiagnostics(file);
+                    if (diags) {
+                        var bakedDiags = diags.map(function (diag) { return formatDiag(file, project, diag); });
+                        this.event({ file: file, diagnostics: bakedDiags }, "semanticDiag");
+                    }
+                }
+                catch (err) {
+                    this.logError(err, "semantic check");
+                }
+            };
+            Session.prototype.syntacticCheck = function (file, project) {
+                try {
+                    var diags = project.compilerService.languageService.getSyntacticDiagnostics(file);
+                    if (diags) {
+                        var bakedDiags = diags.map(function (diag) { return formatDiag(file, project, diag); });
+                        this.event({ file: file, diagnostics: bakedDiags }, "syntaxDiag");
+                    }
+                }
+                catch (err) {
+                    this.logError(err, "syntactic check");
+                }
+            };
+            Session.prototype.reloadProjects = function () {
+                this.projectService.reloadProjects();
+            };
+            Session.prototype.updateProjectStructure = function (seq, matchSeq, ms) {
+                var _this = this;
+                if (ms === void 0) { ms = 1500; }
+                setTimeout(function () {
+                    if (matchSeq(seq)) {
+                        _this.projectService.updateProjectStructure();
+                    }
+                }, ms);
+            };
+            Session.prototype.updateErrorCheck = function (checkList, seq, matchSeq, ms, followMs, requireOpen) {
+                var _this = this;
+                if (ms === void 0) { ms = 1500; }
+                if (followMs === void 0) { followMs = 200; }
+                if (requireOpen === void 0) { requireOpen = true; }
+                if (followMs > ms) {
+                    followMs = ms;
+                }
+                if (this.errorTimer) {
+                    clearTimeout(this.errorTimer);
+                }
+                if (this.immediateId) {
+                    clearImmediate(this.immediateId);
+                    this.immediateId = undefined;
+                }
+                var index = 0;
+                var checkOne = function () {
+                    if (matchSeq(seq)) {
+                        var checkSpec_1 = checkList[index];
+                        index++;
+                        if (checkSpec_1.project.getSourceFileFromName(checkSpec_1.fileName, requireOpen)) {
+                            _this.syntacticCheck(checkSpec_1.fileName, checkSpec_1.project);
+                            _this.immediateId = setImmediate(function () {
+                                _this.semanticCheck(checkSpec_1.fileName, checkSpec_1.project);
+                                _this.immediateId = undefined;
+                                if (checkList.length > index) {
+                                    _this.errorTimer = setTimeout(checkOne, followMs);
+                                }
+                                else {
+                                    _this.errorTimer = undefined;
+                                }
+                            });
+                        }
+                    }
+                };
+                if ((checkList.length > index) && (matchSeq(seq))) {
+                    this.errorTimer = setTimeout(checkOne, ms);
+                }
+            };
+            Session.prototype.getDefinition = function (line, offset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var definitions = compilerService.languageService.getDefinitionAtPosition(file, position);
+                if (!definitions) {
+                    return undefined;
+                }
+                return definitions.map(function (def) { return ({
+                    file: def.fileName,
+                    start: compilerService.host.positionToLineOffset(def.fileName, def.textSpan.start),
+                    end: compilerService.host.positionToLineOffset(def.fileName, ts.textSpanEnd(def.textSpan))
+                }); });
+            };
+            Session.prototype.getTypeDefinition = function (line, offset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var definitions = compilerService.languageService.getTypeDefinitionAtPosition(file, position);
+                if (!definitions) {
+                    return undefined;
+                }
+                return definitions.map(function (def) { return ({
+                    file: def.fileName,
+                    start: compilerService.host.positionToLineOffset(def.fileName, def.textSpan.start),
+                    end: compilerService.host.positionToLineOffset(def.fileName, ts.textSpanEnd(def.textSpan))
+                }); });
+            };
+            Session.prototype.getOccurrences = function (line, offset, fileName) {
+                fileName = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(fileName);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(fileName, line, offset);
+                var occurrences = compilerService.languageService.getOccurrencesAtPosition(fileName, position);
+                if (!occurrences) {
+                    return undefined;
+                }
+                return occurrences.map(function (occurrence) {
+                    var fileName = occurrence.fileName, isWriteAccess = occurrence.isWriteAccess, textSpan = occurrence.textSpan;
+                    var start = compilerService.host.positionToLineOffset(fileName, textSpan.start);
+                    var end = compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(textSpan));
+                    return {
+                        start: start,
+                        end: end,
+                        file: fileName,
+                        isWriteAccess: isWriteAccess
+                    };
+                });
+            };
+            Session.prototype.getDocumentHighlights = function (line, offset, fileName, filesToSearch) {
+                fileName = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(fileName);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(fileName, line, offset);
+                var documentHighlights = compilerService.languageService.getDocumentHighlights(fileName, position, filesToSearch);
+                if (!documentHighlights) {
+                    return undefined;
+                }
+                return documentHighlights.map(convertToDocumentHighlightsItem);
+                function convertToDocumentHighlightsItem(documentHighlights) {
+                    var fileName = documentHighlights.fileName, highlightSpans = documentHighlights.highlightSpans;
+                    return {
+                        file: fileName,
+                        highlightSpans: highlightSpans.map(convertHighlightSpan)
+                    };
+                    function convertHighlightSpan(highlightSpan) {
+                        var textSpan = highlightSpan.textSpan, kind = highlightSpan.kind;
+                        var start = compilerService.host.positionToLineOffset(fileName, textSpan.start);
+                        var end = compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(textSpan));
+                        return { start: start, end: end, kind: kind };
+                    }
+                }
+            };
+            Session.prototype.getProjectInfo = function (fileName, needFileNameList) {
+                fileName = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(fileName);
+                var projectInfo = {
+                    configFileName: project.projectFilename
+                };
+                if (needFileNameList) {
+                    projectInfo.fileNames = project.getFileNames();
+                }
+                return projectInfo;
+            };
+            Session.prototype.getRenameLocations = function (line, offset, fileName, findInComments, findInStrings) {
+                var file = ts.normalizePath(fileName);
+                var info = this.projectService.getScriptInfo(file);
+                var projects = this.projectService.findReferencingProjects(info);
+                if (!projects.length) {
+                    throw Errors.NoProject;
+                }
+                var defaultProject = projects[0];
+                var defaultProjectCompilerService = defaultProject.compilerService;
+                var position = defaultProjectCompilerService.host.lineOffsetToPosition(file, line, offset);
+                var renameInfo = defaultProjectCompilerService.languageService.getRenameInfo(file, position);
+                if (!renameInfo) {
+                    return undefined;
+                }
+                if (!renameInfo.canRename) {
+                    return {
+                        info: renameInfo,
+                        locs: []
+                    };
+                }
+                var fileSpans = server.combineProjectOutput(projects, function (project) {
+                    var compilerService = project.compilerService;
+                    var renameLocations = compilerService.languageService.findRenameLocations(file, position, findInStrings, findInComments);
+                    if (!renameLocations) {
+                        return [];
+                    }
+                    return renameLocations.map(function (location) { return ({
+                        file: location.fileName,
+                        start: compilerService.host.positionToLineOffset(location.fileName, location.textSpan.start),
+                        end: compilerService.host.positionToLineOffset(location.fileName, ts.textSpanEnd(location.textSpan))
+                    }); });
+                }, compareRenameLocation, function (a, b) { return a.file === b.file && a.start.line === b.start.line && a.start.offset === b.start.offset; });
+                var locs = fileSpans.reduce(function (accum, cur) {
+                    var curFileAccum;
+                    if (accum.length > 0) {
+                        curFileAccum = accum[accum.length - 1];
+                        if (curFileAccum.file !== cur.file) {
+                            curFileAccum = undefined;
+                        }
+                    }
+                    if (!curFileAccum) {
+                        curFileAccum = { file: cur.file, locs: [] };
+                        accum.push(curFileAccum);
+                    }
+                    curFileAccum.locs.push({ start: cur.start, end: cur.end });
+                    return accum;
+                }, []);
+                return { info: renameInfo, locs: locs };
+                function compareRenameLocation(a, b) {
+                    if (a.file < b.file) {
+                        return -1;
+                    }
+                    else if (a.file > b.file) {
+                        return 1;
+                    }
+                    else {
+                        if (a.start.line < b.start.line) {
+                            return 1;
+                        }
+                        else if (a.start.line > b.start.line) {
+                            return -1;
+                        }
+                        else {
+                            return b.start.offset - a.start.offset;
+                        }
+                    }
+                }
+            };
+            Session.prototype.getReferences = function (line, offset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var info = this.projectService.getScriptInfo(file);
+                var projects = this.projectService.findReferencingProjects(info);
+                if (!projects.length) {
+                    throw Errors.NoProject;
+                }
+                var defaultProject = projects[0];
+                var position = defaultProject.compilerService.host.lineOffsetToPosition(file, line, offset);
+                var nameInfo = defaultProject.compilerService.languageService.getQuickInfoAtPosition(file, position);
+                if (!nameInfo) {
+                    return undefined;
+                }
+                var displayString = ts.displayPartsToString(nameInfo.displayParts);
+                var nameSpan = nameInfo.textSpan;
+                var nameColStart = defaultProject.compilerService.host.positionToLineOffset(file, nameSpan.start).offset;
+                var nameText = defaultProject.compilerService.host.getScriptSnapshot(file).getText(nameSpan.start, ts.textSpanEnd(nameSpan));
+                var refs = server.combineProjectOutput(projects, function (project) {
+                    var compilerService = project.compilerService;
+                    var references = compilerService.languageService.getReferencesAtPosition(file, position);
+                    if (!references) {
+                        return [];
+                    }
+                    return references.map(function (ref) {
+                        var start = compilerService.host.positionToLineOffset(ref.fileName, ref.textSpan.start);
+                        var refLineSpan = compilerService.host.lineToTextSpan(ref.fileName, start.line - 1);
+                        var snap = compilerService.host.getScriptSnapshot(ref.fileName);
+                        var lineText = snap.getText(refLineSpan.start, ts.textSpanEnd(refLineSpan)).replace(/\r|\n/g, "");
+                        return {
+                            file: ref.fileName,
+                            start: start,
+                            lineText: lineText,
+                            end: compilerService.host.positionToLineOffset(ref.fileName, ts.textSpanEnd(ref.textSpan)),
+                            isWriteAccess: ref.isWriteAccess
+                        };
+                    });
+                }, compareFileStart, areReferencesResponseItemsForTheSameLocation);
+                return {
+                    refs: refs,
+                    symbolName: nameText,
+                    symbolStartOffset: nameColStart,
+                    symbolDisplayString: displayString
+                };
+                function areReferencesResponseItemsForTheSameLocation(a, b) {
+                    if (a && b) {
+                        return a.file === b.file &&
+                            a.start === b.start &&
+                            a.end === b.end;
+                    }
+                    return false;
+                }
+            };
+            Session.prototype.openClientFile = function (fileName, fileContent, scriptKind) {
+                var file = ts.normalizePath(fileName);
+                var _a = this.projectService.openClientFile(file, fileContent, scriptKind), configFileName = _a.configFileName, configFileErrors = _a.configFileErrors;
+                if (configFileErrors) {
+                    this.configFileDiagnosticEvent(fileName, configFileName, configFileErrors);
+                }
+            };
+            Session.prototype.getQuickInfo = function (line, offset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var quickInfo = compilerService.languageService.getQuickInfoAtPosition(file, position);
+                if (!quickInfo) {
+                    return undefined;
+                }
+                var displayString = ts.displayPartsToString(quickInfo.displayParts);
+                var docString = ts.displayPartsToString(quickInfo.documentation);
+                return {
+                    kind: quickInfo.kind,
+                    kindModifiers: quickInfo.kindModifiers,
+                    start: compilerService.host.positionToLineOffset(file, quickInfo.textSpan.start),
+                    end: compilerService.host.positionToLineOffset(file, ts.textSpanEnd(quickInfo.textSpan)),
+                    displayString: displayString,
+                    documentation: docString
+                };
+            };
+            Session.prototype.getFormattingEditsForRange = function (line, offset, endLine, endOffset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var startPosition = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var endPosition = compilerService.host.lineOffsetToPosition(file, endLine, endOffset);
+                var edits = compilerService.languageService.getFormattingEditsForRange(file, startPosition, endPosition, this.projectService.getFormatCodeOptions(file));
+                if (!edits) {
+                    return undefined;
+                }
+                return edits.map(function (edit) {
+                    return {
+                        start: compilerService.host.positionToLineOffset(file, edit.span.start),
+                        end: compilerService.host.positionToLineOffset(file, ts.textSpanEnd(edit.span)),
+                        newText: edit.newText ? edit.newText : ""
+                    };
+                });
+            };
+            Session.prototype.getFormattingEditsAfterKeystroke = function (line, offset, key, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var formatOptions = this.projectService.getFormatCodeOptions(file);
+                var edits = compilerService.languageService.getFormattingEditsAfterKeystroke(file, position, key, formatOptions);
+                if ((key == "\n") && ((!edits) || (edits.length === 0) || allEditsBeforePos(edits, position))) {
+                    var scriptInfo = compilerService.host.getScriptInfo(file);
+                    if (scriptInfo) {
+                        var lineInfo = scriptInfo.getLineInfo(line);
+                        if (lineInfo && (lineInfo.leaf) && (lineInfo.leaf.text)) {
+                            var lineText = lineInfo.leaf.text;
+                            if (lineText.search("\\S") < 0) {
+                                var editorOptions = {
+                                    IndentSize: formatOptions.IndentSize,
+                                    TabSize: formatOptions.TabSize,
+                                    NewLineCharacter: formatOptions.NewLineCharacter,
+                                    ConvertTabsToSpaces: formatOptions.ConvertTabsToSpaces,
+                                    IndentStyle: ts.IndentStyle.Smart
+                                };
+                                var preferredIndent = compilerService.languageService.getIndentationAtPosition(file, position, editorOptions);
+                                var hasIndent = 0;
+                                var i = void 0, len = void 0;
+                                for (i = 0, len = lineText.length; i < len; i++) {
+                                    if (lineText.charAt(i) == " ") {
+                                        hasIndent++;
+                                    }
+                                    else if (lineText.charAt(i) == "\t") {
+                                        hasIndent += editorOptions.TabSize;
+                                    }
+                                    else {
+                                        break;
+                                    }
+                                }
+                                if (preferredIndent !== hasIndent) {
+                                    var firstNoWhiteSpacePosition = lineInfo.offset + i;
+                                    edits.push({
+                                        span: ts.createTextSpanFromBounds(lineInfo.offset, firstNoWhiteSpacePosition),
+                                        newText: generateIndentString(preferredIndent, editorOptions)
+                                    });
+                                }
+                            }
+                        }
+                    }
+                }
+                if (!edits) {
+                    return undefined;
+                }
+                return edits.map(function (edit) {
+                    return {
+                        start: compilerService.host.positionToLineOffset(file, edit.span.start),
+                        end: compilerService.host.positionToLineOffset(file, ts.textSpanEnd(edit.span)),
+                        newText: edit.newText ? edit.newText : ""
+                    };
+                });
+            };
+            Session.prototype.getCompletions = function (line, offset, prefix, fileName) {
+                if (!prefix) {
+                    prefix = "";
+                }
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var completions = compilerService.languageService.getCompletionsAtPosition(file, position);
+                if (!completions) {
+                    return undefined;
+                }
+                return completions.entries.reduce(function (result, entry) {
+                    if (completions.isMemberCompletion || (entry.name.toLowerCase().indexOf(prefix.toLowerCase()) === 0)) {
+                        result.push(entry);
+                    }
+                    return result;
+                }, []).sort(function (a, b) { return a.name.localeCompare(b.name); });
+            };
+            Session.prototype.getCompletionEntryDetails = function (line, offset, entryNames, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                return entryNames.reduce(function (accum, entryName) {
+                    var details = compilerService.languageService.getCompletionEntryDetails(file, position, entryName);
+                    if (details) {
+                        accum.push(details);
+                    }
+                    return accum;
+                }, []);
+            };
+            Session.prototype.getSignatureHelpItems = function (line, offset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var helpItems = compilerService.languageService.getSignatureHelpItems(file, position);
+                if (!helpItems) {
+                    return undefined;
+                }
+                var span = helpItems.applicableSpan;
+                var result = {
+                    items: helpItems.items,
+                    applicableSpan: {
+                        start: compilerService.host.positionToLineOffset(file, span.start),
+                        end: compilerService.host.positionToLineOffset(file, span.start + span.length)
+                    },
+                    selectedItemIndex: helpItems.selectedItemIndex,
+                    argumentIndex: helpItems.argumentIndex,
+                    argumentCount: helpItems.argumentCount
+                };
+                return result;
+            };
+            Session.prototype.getDiagnostics = function (delay, fileNames) {
+                var _this = this;
+                var checkList = fileNames.reduce(function (accum, fileName) {
+                    fileName = ts.normalizePath(fileName);
+                    var project = _this.projectService.getProjectForFile(fileName);
+                    if (project) {
+                        accum.push({ fileName: fileName, project: project });
+                    }
+                    return accum;
+                }, []);
+                if (checkList.length > 0) {
+                    this.updateErrorCheck(checkList, this.changeSeq, function (n) { return n === _this.changeSeq; }, delay);
+                }
+            };
+            Session.prototype.change = function (line, offset, endLine, endOffset, insertString, fileName) {
+                var _this = this;
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (project) {
+                    var compilerService = project.compilerService;
+                    var start = compilerService.host.lineOffsetToPosition(file, line, offset);
+                    var end = compilerService.host.lineOffsetToPosition(file, endLine, endOffset);
+                    if (start >= 0) {
+                        compilerService.host.editScript(file, start, end, insertString);
+                        this.changeSeq++;
+                    }
+                    this.updateProjectStructure(this.changeSeq, function (n) { return n === _this.changeSeq; });
+                }
+            };
+            Session.prototype.reload = function (fileName, tempFileName, reqSeq) {
+                var _this = this;
+                if (reqSeq === void 0) { reqSeq = 0; }
+                var file = ts.normalizePath(fileName);
+                var tmpfile = ts.normalizePath(tempFileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (project) {
+                    this.changeSeq++;
+                    project.compilerService.host.reloadScript(file, tmpfile, function () {
+                        _this.output(undefined, CommandNames.Reload, reqSeq);
+                    });
+                }
+            };
+            Session.prototype.saveToTmp = function (fileName, tempFileName) {
+                var file = ts.normalizePath(fileName);
+                var tmpfile = ts.normalizePath(tempFileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (project) {
+                    project.compilerService.host.saveTo(file, tmpfile);
+                }
+            };
+            Session.prototype.closeClientFile = function (fileName) {
+                if (!fileName) {
+                    return;
+                }
+                var file = ts.normalizePath(fileName);
+                this.projectService.closeClientFile(file);
+            };
+            Session.prototype.decorateNavigationBarItem = function (project, fileName, items) {
+                var _this = this;
+                if (!items) {
+                    return undefined;
+                }
+                var compilerService = project.compilerService;
+                return items.map(function (item) { return ({
+                    text: item.text,
+                    kind: item.kind,
+                    kindModifiers: item.kindModifiers,
+                    spans: item.spans.map(function (span) { return ({
+                        start: compilerService.host.positionToLineOffset(fileName, span.start),
+                        end: compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(span))
+                    }); }),
+                    childItems: _this.decorateNavigationBarItem(project, fileName, item.childItems),
+                    indent: item.indent
+                }); });
+            };
+            Session.prototype.getNavigationBarItems = function (fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var items = compilerService.languageService.getNavigationBarItems(file);
+                if (!items) {
+                    return undefined;
+                }
+                return this.decorateNavigationBarItem(project, fileName, items);
+            };
+            Session.prototype.getNavigateToItems = function (searchValue, fileName, maxResultCount) {
+                var file = ts.normalizePath(fileName);
+                var info = this.projectService.getScriptInfo(file);
+                var projects = this.projectService.findReferencingProjects(info);
+                var defaultProject = projects[0];
+                if (!defaultProject) {
+                    throw Errors.NoProject;
+                }
+                var allNavToItems = server.combineProjectOutput(projects, function (project) {
+                    var compilerService = project.compilerService;
+                    var navItems = compilerService.languageService.getNavigateToItems(searchValue, maxResultCount);
+                    if (!navItems) {
+                        return [];
+                    }
+                    return navItems.map(function (navItem) {
+                        var start = compilerService.host.positionToLineOffset(navItem.fileName, navItem.textSpan.start);
+                        var end = compilerService.host.positionToLineOffset(navItem.fileName, ts.textSpanEnd(navItem.textSpan));
+                        var bakedItem = {
+                            name: navItem.name,
+                            kind: navItem.kind,
+                            file: navItem.fileName,
+                            start: start,
+                            end: end
+                        };
+                        if (navItem.kindModifiers && (navItem.kindModifiers !== "")) {
+                            bakedItem.kindModifiers = navItem.kindModifiers;
+                        }
+                        if (navItem.matchKind !== "none") {
+                            bakedItem.matchKind = navItem.matchKind;
+                        }
+                        if (navItem.containerName && (navItem.containerName.length > 0)) {
+                            bakedItem.containerName = navItem.containerName;
+                        }
+                        if (navItem.containerKind && (navItem.containerKind.length > 0)) {
+                            bakedItem.containerKind = navItem.containerKind;
+                        }
+                        return bakedItem;
+                    });
+                }, undefined, areNavToItemsForTheSameLocation);
+                return allNavToItems;
+                function areNavToItemsForTheSameLocation(a, b) {
+                    if (a && b) {
+                        return a.file === b.file &&
+                            a.start === b.start &&
+                            a.end === b.end;
+                    }
+                    return false;
+                }
+            };
+            Session.prototype.getBraceMatching = function (line, offset, fileName) {
+                var file = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(file);
+                if (!project) {
+                    throw Errors.NoProject;
+                }
+                var compilerService = project.compilerService;
+                var position = compilerService.host.lineOffsetToPosition(file, line, offset);
+                var spans = compilerService.languageService.getBraceMatchingAtPosition(file, position);
+                if (!spans) {
+                    return undefined;
+                }
+                return spans.map(function (span) { return ({
+                    start: compilerService.host.positionToLineOffset(file, span.start),
+                    end: compilerService.host.positionToLineOffset(file, span.start + span.length)
+                }); });
+            };
+            Session.prototype.getDiagnosticsForProject = function (delay, fileName) {
+                var _this = this;
+                var fileNames = this.getProjectInfo(fileName, true).fileNames;
+                var fileNamesInProject = fileNames.filter(function (value, index, array) { return value.indexOf("lib.d.ts") < 0; });
+                var highPriorityFiles = [];
+                var mediumPriorityFiles = [];
+                var lowPriorityFiles = [];
+                var veryLowPriorityFiles = [];
+                var normalizedFileName = ts.normalizePath(fileName);
+                var project = this.projectService.getProjectForFile(normalizedFileName);
+                for (var _i = 0, fileNamesInProject_1 = fileNamesInProject; _i < fileNamesInProject_1.length; _i++) {
+                    var fileNameInProject = fileNamesInProject_1[_i];
+                    if (this.getCanonicalFileName(fileNameInProject) == this.getCanonicalFileName(fileName))
+                        highPriorityFiles.push(fileNameInProject);
+                    else {
+                        var info = this.projectService.getScriptInfo(fileNameInProject);
+                        if (!info.isOpen) {
+                            if (fileNameInProject.indexOf(".d.ts") > 0)
+                                veryLowPriorityFiles.push(fileNameInProject);
+                            else
+                                lowPriorityFiles.push(fileNameInProject);
+                        }
+                        else
+                            mediumPriorityFiles.push(fileNameInProject);
+                    }
+                }
+                fileNamesInProject = highPriorityFiles.concat(mediumPriorityFiles).concat(lowPriorityFiles).concat(veryLowPriorityFiles);
+                if (fileNamesInProject.length > 0) {
+                    var checkList = fileNamesInProject.map(function (fileName) {
+                        var normalizedFileName = ts.normalizePath(fileName);
+                        return { fileName: normalizedFileName, project: project };
+                    });
+                    this.updateErrorCheck(checkList, this.changeSeq, function (n) { return n == _this.changeSeq; }, delay, 200, false);
+                }
+            };
+            Session.prototype.getCanonicalFileName = function (fileName) {
+                var name = this.host.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
+                return ts.normalizePath(name);
+            };
+            Session.prototype.exit = function () {
+            };
+            Session.prototype.addProtocolHandler = function (command, handler) {
+                if (this.handlers[command]) {
+                    throw new Error("Protocol handler already exists for command \"" + command + "\"");
+                }
+                this.handlers[command] = handler;
+            };
+            Session.prototype.executeCommand = function (request) {
+                var handler = this.handlers[request.command];
+                if (handler) {
+                    return handler(request);
+                }
+                else {
+                    this.projectService.log("Unrecognized JSON command: " + JSON.stringify(request));
+                    this.output(undefined, CommandNames.Unknown, request.seq, "Unrecognized JSON command: " + request.command);
+                    return { responseRequired: false };
+                }
+            };
+            Session.prototype.onMessage = function (message) {
+                var start;
+                if (this.logger.isVerbose()) {
+                    this.logger.info("request: " + message);
+                    start = this.hrtime();
+                }
+                var request;
+                try {
+                    request = JSON.parse(message);
+                    var _a = this.executeCommand(request), response = _a.response, responseRequired = _a.responseRequired;
+                    if (this.logger.isVerbose()) {
+                        var elapsed = this.hrtime(start);
+                        var seconds = elapsed[0];
+                        var nanoseconds = elapsed[1];
+                        var elapsedMs = ((1e9 * seconds) + nanoseconds) / 1000000.0;
+                        var leader = "Elapsed time (in milliseconds)";
+                        if (!responseRequired) {
+                            leader = "Async elapsed time (in milliseconds)";
+                        }
+                        this.logger.msg(leader + ": " + elapsedMs.toFixed(4).toString(), "Perf");
+                    }
+                    if (response) {
+                        this.output(response, request.command, request.seq);
+                    }
+                    else if (responseRequired) {
+                        this.output(undefined, request.command, request.seq, "No content available.");
+                    }
+                }
+                catch (err) {
+                    if (err instanceof ts.OperationCanceledException) {
+                    }
+                    this.logError(err, message);
+                    this.output(undefined, request ? request.command : CommandNames.Unknown, request ? request.seq : 0, "Error processing request. " + err.message + "\n" + err.stack);
+                }
+            };
+            return Session;
+        }());
+        server.Session = Session;
+    })(server = ts.server || (ts.server = {}));
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    var server;
+    (function (server) {
+        var lineCollectionCapacity = 4;
+        function mergeFormatOptions(formatCodeOptions, formatOptions) {
+            var hasOwnProperty = Object.prototype.hasOwnProperty;
+            Object.keys(formatOptions).forEach(function (key) {
+                var codeKey = key.charAt(0).toUpperCase() + key.substring(1);
+                if (hasOwnProperty.call(formatCodeOptions, codeKey)) {
+                    formatCodeOptions[codeKey] = formatOptions[key];
+                }
+            });
+        }
+        var ScriptInfo = (function () {
+            function ScriptInfo(host, fileName, content, isOpen) {
+                if (isOpen === void 0) { isOpen = false; }
+                this.host = host;
+                this.fileName = fileName;
+                this.content = content;
+                this.isOpen = isOpen;
+                this.children = [];
+                this.formatCodeOptions = ts.clone(CompilerService.getDefaultFormatCodeOptions(this.host));
+                this.path = ts.toPath(fileName, host.getCurrentDirectory(), ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames));
+                this.svc = ScriptVersionCache.fromString(host, content);
+            }
+            ScriptInfo.prototype.setFormatOptions = function (formatOptions) {
+                if (formatOptions) {
+                    mergeFormatOptions(this.formatCodeOptions, formatOptions);
+                }
+            };
+            ScriptInfo.prototype.close = function () {
+                this.isOpen = false;
+            };
+            ScriptInfo.prototype.addChild = function (childInfo) {
+                this.children.push(childInfo);
+            };
+            ScriptInfo.prototype.snap = function () {
+                return this.svc.getSnapshot();
+            };
+            ScriptInfo.prototype.getText = function () {
+                var snap = this.snap();
+                return snap.getText(0, snap.getLength());
+            };
+            ScriptInfo.prototype.getLineInfo = function (line) {
+                var snap = this.snap();
+                return snap.index.lineNumberToInfo(line);
+            };
+            ScriptInfo.prototype.editContent = function (start, end, newText) {
+                this.svc.edit(start, end - start, newText);
+            };
+            ScriptInfo.prototype.getTextChangeRangeBetweenVersions = function (startVersion, endVersion) {
+                return this.svc.getTextChangesBetweenVersions(startVersion, endVersion);
+            };
+            ScriptInfo.prototype.getChangeRange = function (oldSnapshot) {
+                return this.snap().getChangeRange(oldSnapshot);
+            };
+            return ScriptInfo;
+        }());
+        server.ScriptInfo = ScriptInfo;
+        var LSHost = (function () {
+            function LSHost(host, project) {
+                var _this = this;
+                this.host = host;
+                this.project = project;
+                this.roots = [];
+                this.getCanonicalFileName = ts.createGetCanonicalFileName(host.useCaseSensitiveFileNames);
+                this.resolvedModuleNames = ts.createFileMap();
+                this.resolvedTypeReferenceDirectives = ts.createFileMap();
+                this.filenameToScript = ts.createFileMap();
+                this.moduleResolutionHost = {
+                    fileExists: function (fileName) { return _this.fileExists(fileName); },
+                    readFile: function (fileName) { return _this.host.readFile(fileName); },
+                    directoryExists: function (directoryName) { return _this.host.directoryExists(directoryName); }
+                };
+            }
+            LSHost.prototype.resolveNamesWithLocalCache = function (names, containingFile, cache, loader, getResult) {
+                var path = ts.toPath(containingFile, this.host.getCurrentDirectory(), this.getCanonicalFileName);
+                var currentResolutionsInFile = cache.get(path);
+                var newResolutions = {};
+                var resolvedModules = [];
+                var compilerOptions = this.getCompilationSettings();
+                for (var _i = 0, names_2 = names; _i < names_2.length; _i++) {
+                    var name_42 = names_2[_i];
+                    var resolution = ts.lookUp(newResolutions, name_42);
+                    if (!resolution) {
+                        var existingResolution = currentResolutionsInFile && ts.lookUp(currentResolutionsInFile, name_42);
+                        if (moduleResolutionIsValid(existingResolution)) {
+                            resolution = existingResolution;
+                        }
+                        else {
+                            resolution = loader(name_42, containingFile, compilerOptions, this.moduleResolutionHost);
+                            resolution.lastCheckTime = Date.now();
+                            newResolutions[name_42] = resolution;
+                        }
+                    }
+                    ts.Debug.assert(resolution !== undefined);
+                    resolvedModules.push(getResult(resolution));
+                }
+                cache.set(path, newResolutions);
+                return resolvedModules;
+                function moduleResolutionIsValid(resolution) {
+                    if (!resolution) {
+                        return false;
+                    }
+                    if (getResult(resolution)) {
+                        return true;
+                    }
+                    return resolution.failedLookupLocations.length === 0;
+                }
+            };
+            LSHost.prototype.resolveTypeReferenceDirectives = function (typeDirectiveNames, containingFile) {
+                return this.resolveNamesWithLocalCache(typeDirectiveNames, containingFile, this.resolvedTypeReferenceDirectives, ts.resolveTypeReferenceDirective, function (m) { return m.resolvedTypeReferenceDirective; });
+            };
+            LSHost.prototype.resolveModuleNames = function (moduleNames, containingFile) {
+                return this.resolveNamesWithLocalCache(moduleNames, containingFile, this.resolvedModuleNames, ts.resolveModuleName, function (m) { return m.resolvedModule; });
+            };
+            LSHost.prototype.getDefaultLibFileName = function () {
+                var nodeModuleBinDir = ts.getDirectoryPath(ts.normalizePath(this.host.getExecutingFilePath()));
+                return ts.combinePaths(nodeModuleBinDir, ts.getDefaultLibFileName(this.compilationSettings));
+            };
+            LSHost.prototype.getScriptSnapshot = function (filename) {
+                var scriptInfo = this.getScriptInfo(filename);
+                if (scriptInfo) {
+                    return scriptInfo.snap();
+                }
+            };
+            LSHost.prototype.setCompilationSettings = function (opt) {
+                this.compilationSettings = opt;
+                this.resolvedModuleNames.clear();
+                this.resolvedTypeReferenceDirectives.clear();
+            };
+            LSHost.prototype.lineAffectsRefs = function (filename, line) {
+                var info = this.getScriptInfo(filename);
+                var lineInfo = info.getLineInfo(line);
+                if (lineInfo && lineInfo.text) {
+                    var regex = /reference|import|\/\*|\*\//;
+                    return regex.test(lineInfo.text);
+                }
+            };
+            LSHost.prototype.getCompilationSettings = function () {
+                return this.compilationSettings;
+            };
+            LSHost.prototype.getScriptFileNames = function () {
+                return this.roots.map(function (root) { return root.fileName; });
+            };
+            LSHost.prototype.getScriptKind = function (fileName) {
+                var info = this.getScriptInfo(fileName);
+                if (!info) {
+                    return undefined;
+                }
+                if (!info.scriptKind) {
+                    info.scriptKind = ts.getScriptKindFromFileName(fileName);
+                }
+                return info.scriptKind;
+            };
+            LSHost.prototype.getScriptVersion = function (filename) {
+                return this.getScriptInfo(filename).svc.latestVersion().toString();
+            };
+            LSHost.prototype.getCurrentDirectory = function () {
+                return "";
+            };
+            LSHost.prototype.getScriptIsOpen = function (filename) {
+                return this.getScriptInfo(filename).isOpen;
+            };
+            LSHost.prototype.removeReferencedFile = function (info) {
+                if (!info.isOpen) {
+                    this.filenameToScript.remove(info.path);
+                    this.resolvedModuleNames.remove(info.path);
+                    this.resolvedTypeReferenceDirectives.remove(info.path);
+                }
+            };
+            LSHost.prototype.getScriptInfo = function (filename) {
+                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
+                var scriptInfo = this.filenameToScript.get(path);
+                if (!scriptInfo) {
+                    scriptInfo = this.project.openReferencedFile(filename);
+                    if (scriptInfo) {
+                        this.filenameToScript.set(path, scriptInfo);
+                    }
+                }
+                return scriptInfo;
+            };
+            LSHost.prototype.addRoot = function (info) {
+                if (!this.filenameToScript.contains(info.path)) {
+                    this.filenameToScript.set(info.path, info);
+                    this.roots.push(info);
+                }
+            };
+            LSHost.prototype.removeRoot = function (info) {
+                if (this.filenameToScript.contains(info.path)) {
+                    this.filenameToScript.remove(info.path);
+                    this.roots = copyListRemovingItem(info, this.roots);
+                    this.resolvedModuleNames.remove(info.path);
+                    this.resolvedTypeReferenceDirectives.remove(info.path);
+                }
+            };
+            LSHost.prototype.saveTo = function (filename, tmpfilename) {
+                var script = this.getScriptInfo(filename);
+                if (script) {
+                    var snap = script.snap();
+                    this.host.writeFile(tmpfilename, snap.getText(0, snap.getLength()));
+                }
+            };
+            LSHost.prototype.reloadScript = function (filename, tmpfilename, cb) {
+                var script = this.getScriptInfo(filename);
+                if (script) {
+                    script.svc.reloadFromFile(tmpfilename, cb);
+                }
+            };
+            LSHost.prototype.editScript = function (filename, start, end, newText) {
+                var script = this.getScriptInfo(filename);
+                if (script) {
+                    script.editContent(start, end, newText);
+                    return;
+                }
+                throw new Error("No script with name '" + filename + "'");
+            };
+            LSHost.prototype.resolvePath = function (path) {
+                var result = this.host.resolvePath(path);
+                return result;
+            };
+            LSHost.prototype.fileExists = function (path) {
+                var result = this.host.fileExists(path);
+                return result;
+            };
+            LSHost.prototype.directoryExists = function (path) {
+                return this.host.directoryExists(path);
+            };
+            LSHost.prototype.lineToTextSpan = function (filename, line) {
+                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
+                var script = this.filenameToScript.get(path);
+                var index = script.snap().index;
+                var lineInfo = index.lineNumberToInfo(line + 1);
+                var len;
+                if (lineInfo.leaf) {
+                    len = lineInfo.leaf.text.length;
+                }
+                else {
+                    var nextLineInfo = index.lineNumberToInfo(line + 2);
+                    len = nextLineInfo.offset - lineInfo.offset;
+                }
+                return ts.createTextSpan(lineInfo.offset, len);
+            };
+            LSHost.prototype.lineOffsetToPosition = function (filename, line, offset) {
+                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
+                var script = this.filenameToScript.get(path);
+                var index = script.snap().index;
+                var lineInfo = index.lineNumberToInfo(line);
+                return (lineInfo.offset + offset - 1);
+            };
+            LSHost.prototype.positionToLineOffset = function (filename, position) {
+                var path = ts.toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
+                var script = this.filenameToScript.get(path);
+                var index = script.snap().index;
+                var lineOffset = index.charOffsetToLineNumberAndPos(position);
+                return { line: lineOffset.line, offset: lineOffset.offset + 1 };
+            };
+            return LSHost;
+        }());
+        server.LSHost = LSHost;
+        var Project = (function () {
+            function Project(projectService, projectOptions) {
+                this.projectService = projectService;
+                this.projectOptions = projectOptions;
+                this.directoriesWatchedForTsconfig = [];
+                this.filenameToSourceFile = {};
+                this.updateGraphSeq = 0;
+                this.openRefCount = 0;
+                if (projectOptions && projectOptions.files) {
+                    projectOptions.compilerOptions.allowNonTsExtensions = true;
+                }
+                this.compilerService = new CompilerService(this, projectOptions && projectOptions.compilerOptions);
+            }
+            Project.prototype.addOpenRef = function () {
+                this.openRefCount++;
+            };
+            Project.prototype.deleteOpenRef = function () {
+                this.openRefCount--;
+                return this.openRefCount;
+            };
+            Project.prototype.openReferencedFile = function (filename) {
+                return this.projectService.openFile(filename, false);
+            };
+            Project.prototype.getRootFiles = function () {
+                return this.compilerService.host.roots.map(function (info) { return info.fileName; });
+            };
+            Project.prototype.getFileNames = function () {
+                var sourceFiles = this.program.getSourceFiles();
+                return sourceFiles.map(function (sourceFile) { return sourceFile.fileName; });
+            };
+            Project.prototype.getSourceFile = function (info) {
+                return this.filenameToSourceFile[info.fileName];
+            };
+            Project.prototype.getSourceFileFromName = function (filename, requireOpen) {
+                var info = this.projectService.getScriptInfo(filename);
+                if (info) {
+                    if ((!requireOpen) || info.isOpen) {
+                        return this.getSourceFile(info);
+                    }
+                }
+            };
+            Project.prototype.isRoot = function (info) {
+                return this.compilerService.host.roots.some(function (root) { return root === info; });
+            };
+            Project.prototype.removeReferencedFile = function (info) {
+                this.compilerService.host.removeReferencedFile(info);
+                this.updateGraph();
+            };
+            Project.prototype.updateFileMap = function () {
+                this.filenameToSourceFile = {};
+                var sourceFiles = this.program.getSourceFiles();
+                for (var i = 0, len = sourceFiles.length; i < len; i++) {
+                    var normFilename = ts.normalizePath(sourceFiles[i].fileName);
+                    this.filenameToSourceFile[normFilename] = sourceFiles[i];
+                }
+            };
+            Project.prototype.finishGraph = function () {
+                this.updateGraph();
+                this.compilerService.languageService.getNavigateToItems(".*");
+            };
+            Project.prototype.updateGraph = function () {
+                this.program = this.compilerService.languageService.getProgram();
+                this.updateFileMap();
+            };
+            Project.prototype.isConfiguredProject = function () {
+                return this.projectFilename;
+            };
+            Project.prototype.addRoot = function (info) {
+                this.compilerService.host.addRoot(info);
+            };
+            Project.prototype.removeRoot = function (info) {
+                this.compilerService.host.removeRoot(info);
+            };
+            Project.prototype.filesToString = function () {
+                var strBuilder = "";
+                ts.forEachValue(this.filenameToSourceFile, function (sourceFile) { strBuilder += sourceFile.fileName + "\n"; });
+                return strBuilder;
+            };
+            Project.prototype.setProjectOptions = function (projectOptions) {
+                this.projectOptions = projectOptions;
+                if (projectOptions.compilerOptions) {
+                    projectOptions.compilerOptions.allowNonTsExtensions = true;
+                    this.compilerService.setCompilerOptions(projectOptions.compilerOptions);
+                }
+            };
+            return Project;
+        }());
+        server.Project = Project;
+        function copyListRemovingItem(item, list) {
+            var copiedList = [];
+            for (var i = 0, len = list.length; i < len; i++) {
+                if (list[i] != item) {
+                    copiedList.push(list[i]);
+                }
+            }
+            return copiedList;
+        }
+        function combineProjectOutput(projects, action, comparer, areEqual) {
+            var result = projects.reduce(function (previous, current) { return ts.concatenate(previous, action(current)); }, []).sort(comparer);
+            return projects.length > 1 ? ts.deduplicate(result, areEqual) : result;
+        }
+        server.combineProjectOutput = combineProjectOutput;
+        var ProjectService = (function () {
+            function ProjectService(host, psLogger, eventHandler) {
+                this.host = host;
+                this.psLogger = psLogger;
+                this.eventHandler = eventHandler;
+                this.filenameToScriptInfo = {};
+                this.openFileRoots = [];
+                this.inferredProjects = [];
+                this.configuredProjects = [];
+                this.openFilesReferenced = [];
+                this.openFileRootsConfigured = [];
+                this.directoryWatchersForTsconfig = {};
+                this.directoryWatchersRefCount = {};
+                this.timerForDetectingProjectFileListChanges = {};
+                this.addDefaultHostConfiguration();
+            }
+            ProjectService.prototype.addDefaultHostConfiguration = function () {
+                this.hostConfiguration = {
+                    formatCodeOptions: ts.clone(CompilerService.getDefaultFormatCodeOptions(this.host)),
+                    hostInfo: "Unknown host"
+                };
+            };
+            ProjectService.prototype.getFormatCodeOptions = function (file) {
+                if (file) {
+                    var info = this.filenameToScriptInfo[file];
+                    if (info) {
+                        return info.formatCodeOptions;
+                    }
+                }
+                return this.hostConfiguration.formatCodeOptions;
+            };
+            ProjectService.prototype.watchedFileChanged = function (fileName) {
+                var info = this.filenameToScriptInfo[fileName];
+                if (!info) {
+                    this.psLogger.info("Error: got watch notification for unknown file: " + fileName);
+                }
+                if (!this.host.fileExists(fileName)) {
+                    this.fileDeletedInFilesystem(info);
+                }
+                else {
+                    if (info && (!info.isOpen)) {
+                        info.svc.reloadFromFile(info.fileName);
+                    }
+                }
+            };
+            ProjectService.prototype.directoryWatchedForSourceFilesChanged = function (project, fileName) {
+                if (fileName && !ts.isSupportedSourceFileName(fileName, project.projectOptions ? project.projectOptions.compilerOptions : undefined)) {
+                    return;
+                }
+                this.log("Detected source file changes: " + fileName);
+                this.startTimerForDetectingProjectFileListChanges(project);
+            };
+            ProjectService.prototype.startTimerForDetectingProjectFileListChanges = function (project) {
+                var _this = this;
+                if (this.timerForDetectingProjectFileListChanges[project.projectFilename]) {
+                    this.host.clearTimeout(this.timerForDetectingProjectFileListChanges[project.projectFilename]);
+                }
+                this.timerForDetectingProjectFileListChanges[project.projectFilename] = this.host.setTimeout(function () { return _this.handleProjectFileListChanges(project); }, 250);
+            };
+            ProjectService.prototype.handleProjectFileListChanges = function (project) {
+                var _this = this;
+                var projectOptions = this.configFileToProjectOptions(project.projectFilename).projectOptions;
+                var newRootFiles = projectOptions.files.map((function (f) { return _this.getCanonicalFileName(f); }));
+                var currentRootFiles = project.getRootFiles().map((function (f) { return _this.getCanonicalFileName(f); }));
+                if (!ts.arrayIsEqualTo(currentRootFiles && currentRootFiles.sort(), newRootFiles && newRootFiles.sort())) {
+                    this.updateConfiguredProject(project);
+                    this.updateProjectStructure();
+                }
+            };
+            ProjectService.prototype.directoryWatchedForTsconfigChanged = function (fileName) {
+                var _this = this;
+                if (ts.getBaseFileName(fileName) != "tsconfig.json") {
+                    this.log(fileName + " is not tsconfig.json");
+                    return;
+                }
+                this.log("Detected newly added tsconfig file: " + fileName);
+                var projectOptions = this.configFileToProjectOptions(fileName).projectOptions;
+                var rootFilesInTsconfig = projectOptions.files.map(function (f) { return _this.getCanonicalFileName(f); });
+                var openFileRoots = this.openFileRoots.map(function (s) { return _this.getCanonicalFileName(s.fileName); });
+                for (var _i = 0, openFileRoots_1 = openFileRoots; _i < openFileRoots_1.length; _i++) {
+                    var openFileRoot = openFileRoots_1[_i];
+                    if (rootFilesInTsconfig.indexOf(openFileRoot) >= 0) {
+                        this.reloadProjects();
+                        return;
+                    }
+                }
+            };
+            ProjectService.prototype.getCanonicalFileName = function (fileName) {
+                var name = this.host.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
+                return ts.normalizePath(name);
+            };
+            ProjectService.prototype.watchedProjectConfigFileChanged = function (project) {
+                this.log("Config file changed: " + project.projectFilename);
+                this.updateConfiguredProject(project);
+                this.updateProjectStructure();
+            };
+            ProjectService.prototype.log = function (msg, type) {
+                if (type === void 0) { type = "Err"; }
+                this.psLogger.msg(msg, type);
+            };
+            ProjectService.prototype.setHostConfiguration = function (args) {
+                if (args.file) {
+                    var info = this.filenameToScriptInfo[args.file];
+                    if (info) {
+                        info.setFormatOptions(args.formatOptions);
+                        this.log("Host configuration update for file " + args.file, "Info");
+                    }
+                }
+                else {
+                    if (args.hostInfo !== undefined) {
+                        this.hostConfiguration.hostInfo = args.hostInfo;
+                        this.log("Host information " + args.hostInfo, "Info");
+                    }
+                    if (args.formatOptions) {
+                        mergeFormatOptions(this.hostConfiguration.formatCodeOptions, args.formatOptions);
+                        this.log("Format host information updated", "Info");
+                    }
+                }
+            };
+            ProjectService.prototype.closeLog = function () {
+                this.psLogger.close();
+            };
+            ProjectService.prototype.createInferredProject = function (root) {
+                var _this = this;
+                var project = new Project(this);
+                project.addRoot(root);
+                var currentPath = ts.getDirectoryPath(root.fileName);
+                var parentPath = ts.getDirectoryPath(currentPath);
+                while (currentPath != parentPath) {
+                    if (!project.projectService.directoryWatchersForTsconfig[currentPath]) {
+                        this.log("Add watcher for: " + currentPath);
+                        project.projectService.directoryWatchersForTsconfig[currentPath] =
+                            this.host.watchDirectory(currentPath, function (fileName) { return _this.directoryWatchedForTsconfigChanged(fileName); });
+                        project.projectService.directoryWatchersRefCount[currentPath] = 1;
+                    }
+                    else {
+                        project.projectService.directoryWatchersRefCount[currentPath] += 1;
+                    }
+                    project.directoriesWatchedForTsconfig.push(currentPath);
+                    currentPath = parentPath;
+                    parentPath = ts.getDirectoryPath(parentPath);
+                }
+                project.finishGraph();
+                this.inferredProjects.push(project);
+                return project;
+            };
+            ProjectService.prototype.fileDeletedInFilesystem = function (info) {
+                this.psLogger.info(info.fileName + " deleted");
+                if (info.fileWatcher) {
+                    info.fileWatcher.close();
+                    info.fileWatcher = undefined;
+                }
+                if (!info.isOpen) {
+                    this.filenameToScriptInfo[info.fileName] = undefined;
+                    var referencingProjects = this.findReferencingProjects(info);
+                    if (info.defaultProject) {
+                        info.defaultProject.removeRoot(info);
+                    }
+                    for (var i = 0, len = referencingProjects.length; i < len; i++) {
+                        referencingProjects[i].removeReferencedFile(info);
+                    }
+                    for (var j = 0, flen = this.openFileRoots.length; j < flen; j++) {
+                        var openFile = this.openFileRoots[j];
+                        if (this.eventHandler) {
+                            this.eventHandler("context", openFile.defaultProject, openFile.fileName);
+                        }
+                    }
+                    for (var j = 0, flen = this.openFilesReferenced.length; j < flen; j++) {
+                        var openFile = this.openFilesReferenced[j];
+                        if (this.eventHandler) {
+                            this.eventHandler("context", openFile.defaultProject, openFile.fileName);
+                        }
+                    }
+                }
+                this.printProjects();
+            };
+            ProjectService.prototype.updateConfiguredProjectList = function () {
+                var configuredProjects = [];
+                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
+                    if (this.configuredProjects[i].openRefCount > 0) {
+                        configuredProjects.push(this.configuredProjects[i]);
+                    }
+                }
+                this.configuredProjects = configuredProjects;
+            };
+            ProjectService.prototype.removeProject = function (project) {
+                this.log("remove project: " + project.getRootFiles().toString());
+                if (project.isConfiguredProject()) {
+                    project.projectFileWatcher.close();
+                    project.directoryWatcher.close();
+                    this.configuredProjects = copyListRemovingItem(project, this.configuredProjects);
+                }
+                else {
+                    for (var _i = 0, _a = project.directoriesWatchedForTsconfig; _i < _a.length; _i++) {
+                        var directory = _a[_i];
+                        project.projectService.directoryWatchersRefCount[directory]--;
+                        if (!project.projectService.directoryWatchersRefCount[directory]) {
+                            this.log("Close directory watcher for: " + directory);
+                            project.projectService.directoryWatchersForTsconfig[directory].close();
+                            delete project.projectService.directoryWatchersForTsconfig[directory];
+                        }
+                    }
+                    this.inferredProjects = copyListRemovingItem(project, this.inferredProjects);
+                }
+                var fileNames = project.getFileNames();
+                for (var _b = 0, fileNames_2 = fileNames; _b < fileNames_2.length; _b++) {
+                    var fileName = fileNames_2[_b];
+                    var info = this.getScriptInfo(fileName);
+                    if (info.defaultProject == project) {
+                        info.defaultProject = undefined;
+                    }
+                }
+            };
+            ProjectService.prototype.setConfiguredProjectRoot = function (info) {
+                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
+                    var configuredProject = this.configuredProjects[i];
+                    if (configuredProject.isRoot(info)) {
+                        info.defaultProject = configuredProject;
+                        configuredProject.addOpenRef();
+                        return true;
+                    }
+                }
+                return false;
+            };
+            ProjectService.prototype.addOpenFile = function (info) {
+                if (this.setConfiguredProjectRoot(info)) {
+                    this.openFileRootsConfigured.push(info);
+                }
+                else {
+                    this.findReferencingProjects(info);
+                    if (info.defaultProject) {
+                        this.openFilesReferenced.push(info);
+                    }
+                    else {
+                        info.defaultProject = this.createInferredProject(info);
+                        var openFileRoots = [];
+                        for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
+                            var r = this.openFileRoots[i];
+                            if (info.defaultProject.getSourceFile(r)) {
+                                this.removeProject(r.defaultProject);
+                                this.openFilesReferenced.push(r);
+                                r.defaultProject = info.defaultProject;
+                            }
+                            else {
+                                openFileRoots.push(r);
+                            }
+                        }
+                        this.openFileRoots = openFileRoots;
+                        this.openFileRoots.push(info);
+                    }
+                }
+                this.updateConfiguredProjectList();
+            };
+            ProjectService.prototype.closeOpenFile = function (info) {
+                info.svc.reloadFromFile(info.fileName);
+                var openFileRoots = [];
+                var removedProject;
+                for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
+                    if (info === this.openFileRoots[i]) {
+                        removedProject = info.defaultProject;
+                    }
+                    else {
+                        openFileRoots.push(this.openFileRoots[i]);
+                    }
+                }
+                this.openFileRoots = openFileRoots;
+                if (!removedProject) {
+                    var openFileRootsConfigured = [];
+                    for (var i = 0, len = this.openFileRootsConfigured.length; i < len; i++) {
+                        if (info === this.openFileRootsConfigured[i]) {
+                            if (info.defaultProject.deleteOpenRef() === 0) {
+                                removedProject = info.defaultProject;
+                            }
+                        }
+                        else {
+                            openFileRootsConfigured.push(this.openFileRootsConfigured[i]);
+                        }
+                    }
+                    this.openFileRootsConfigured = openFileRootsConfigured;
+                }
+                if (removedProject) {
+                    this.removeProject(removedProject);
+                    var openFilesReferenced = [];
+                    var orphanFiles = [];
+                    for (var i = 0, len = this.openFilesReferenced.length; i < len; i++) {
+                        var f = this.openFilesReferenced[i];
+                        if (f.defaultProject === removedProject || !f.defaultProject) {
+                            f.defaultProject = undefined;
+                            orphanFiles.push(f);
+                        }
+                        else {
+                            openFilesReferenced.push(f);
+                        }
+                    }
+                    this.openFilesReferenced = openFilesReferenced;
+                    for (var i = 0, len = orphanFiles.length; i < len; i++) {
+                        this.addOpenFile(orphanFiles[i]);
+                    }
+                }
+                else {
+                    this.openFilesReferenced = copyListRemovingItem(info, this.openFilesReferenced);
+                }
+                info.close();
+            };
+            ProjectService.prototype.findReferencingProjects = function (info, excludedProject) {
+                var referencingProjects = [];
+                info.defaultProject = undefined;
+                for (var i = 0, len = this.inferredProjects.length; i < len; i++) {
+                    var inferredProject = this.inferredProjects[i];
+                    inferredProject.updateGraph();
+                    if (inferredProject !== excludedProject) {
+                        if (inferredProject.getSourceFile(info)) {
+                            info.defaultProject = inferredProject;
+                            referencingProjects.push(inferredProject);
+                        }
+                    }
+                }
+                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
+                    var configuredProject = this.configuredProjects[i];
+                    configuredProject.updateGraph();
+                    if (configuredProject.getSourceFile(info)) {
+                        info.defaultProject = configuredProject;
+                        referencingProjects.push(configuredProject);
+                    }
+                }
+                return referencingProjects;
+            };
+            ProjectService.prototype.reloadProjects = function () {
+                this.log("reload projects.");
+                for (var _i = 0, _a = this.openFileRoots; _i < _a.length; _i++) {
+                    var info = _a[_i];
+                    this.openOrUpdateConfiguredProjectForFile(info.fileName);
+                }
+                this.updateProjectStructure();
+            };
+            ProjectService.prototype.updateProjectStructure = function () {
+                this.log("updating project structure from ...", "Info");
+                this.printProjects();
+                var unattachedOpenFiles = [];
+                var openFileRootsConfigured = [];
+                for (var _i = 0, _a = this.openFileRootsConfigured; _i < _a.length; _i++) {
+                    var info = _a[_i];
+                    var project = info.defaultProject;
+                    if (!project || !(project.getSourceFile(info))) {
+                        info.defaultProject = undefined;
+                        unattachedOpenFiles.push(info);
+                    }
+                    else {
+                        openFileRootsConfigured.push(info);
+                    }
+                }
+                this.openFileRootsConfigured = openFileRootsConfigured;
+                var openFilesReferenced = [];
+                for (var i = 0, len = this.openFilesReferenced.length; i < len; i++) {
+                    var referencedFile = this.openFilesReferenced[i];
+                    referencedFile.defaultProject.updateGraph();
+                    var sourceFile = referencedFile.defaultProject.getSourceFile(referencedFile);
+                    if (sourceFile) {
+                        openFilesReferenced.push(referencedFile);
+                    }
+                    else {
+                        unattachedOpenFiles.push(referencedFile);
+                    }
+                }
+                this.openFilesReferenced = openFilesReferenced;
+                var openFileRoots = [];
+                for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
+                    var rootFile = this.openFileRoots[i];
+                    var rootedProject = rootFile.defaultProject;
+                    var referencingProjects = this.findReferencingProjects(rootFile, rootedProject);
+                    if (rootFile.defaultProject && rootFile.defaultProject.isConfiguredProject()) {
+                        if (!rootedProject.isConfiguredProject()) {
+                            this.removeProject(rootedProject);
+                        }
+                        this.openFileRootsConfigured.push(rootFile);
+                    }
+                    else {
+                        if (referencingProjects.length === 0) {
+                            rootFile.defaultProject = rootedProject;
+                            openFileRoots.push(rootFile);
+                        }
+                        else {
+                            this.removeProject(rootedProject);
+                            this.openFilesReferenced.push(rootFile);
+                        }
+                    }
+                }
+                this.openFileRoots = openFileRoots;
+                for (var i = 0, len = unattachedOpenFiles.length; i < len; i++) {
+                    this.addOpenFile(unattachedOpenFiles[i]);
+                }
+                this.printProjects();
+            };
+            ProjectService.prototype.getScriptInfo = function (filename) {
+                filename = ts.normalizePath(filename);
+                return ts.lookUp(this.filenameToScriptInfo, filename);
+            };
+            ProjectService.prototype.openFile = function (fileName, openedByClient, fileContent, scriptKind) {
+                var _this = this;
+                fileName = ts.normalizePath(fileName);
+                var info = ts.lookUp(this.filenameToScriptInfo, fileName);
+                if (!info) {
+                    var content = void 0;
+                    if (this.host.fileExists(fileName)) {
+                        content = fileContent || this.host.readFile(fileName);
+                    }
+                    if (!content) {
+                        if (openedByClient) {
+                            content = "";
+                        }
+                    }
+                    if (content !== undefined) {
+                        info = new ScriptInfo(this.host, fileName, content, openedByClient);
+                        info.scriptKind = scriptKind;
+                        info.setFormatOptions(this.getFormatCodeOptions());
+                        this.filenameToScriptInfo[fileName] = info;
+                        if (!info.isOpen) {
+                            info.fileWatcher = this.host.watchFile(fileName, function (_) { _this.watchedFileChanged(fileName); });
+                        }
+                    }
+                }
+                if (info) {
+                    if (fileContent) {
+                        info.svc.reload(fileContent);
+                    }
+                    if (openedByClient) {
+                        info.isOpen = true;
+                    }
+                }
+                return info;
+            };
+            ProjectService.prototype.findConfigFile = function (searchPath) {
+                while (true) {
+                    var tsconfigFileName = ts.combinePaths(searchPath, "tsconfig.json");
+                    if (this.host.fileExists(tsconfigFileName)) {
+                        return tsconfigFileName;
+                    }
+                    var jsconfigFileName = ts.combinePaths(searchPath, "jsconfig.json");
+                    if (this.host.fileExists(jsconfigFileName)) {
+                        return jsconfigFileName;
+                    }
+                    var parentPath = ts.getDirectoryPath(searchPath);
+                    if (parentPath === searchPath) {
+                        break;
+                    }
+                    searchPath = parentPath;
+                }
+                return undefined;
+            };
+            ProjectService.prototype.openClientFile = function (fileName, fileContent, scriptKind) {
+                var _a = this.openOrUpdateConfiguredProjectForFile(fileName), configFileName = _a.configFileName, configFileErrors = _a.configFileErrors;
+                var info = this.openFile(fileName, true, fileContent, scriptKind);
+                this.addOpenFile(info);
+                this.printProjects();
+                return { configFileName: configFileName, configFileErrors: configFileErrors };
+            };
+            ProjectService.prototype.openOrUpdateConfiguredProjectForFile = function (fileName) {
+                var searchPath = ts.normalizePath(ts.getDirectoryPath(fileName));
+                this.log("Search path: " + searchPath, "Info");
+                var configFileName = this.findConfigFile(searchPath);
+                if (configFileName) {
+                    this.log("Config file name: " + configFileName, "Info");
+                    var project = this.findConfiguredProjectByConfigFile(configFileName);
+                    if (!project) {
+                        var configResult = this.openConfigFile(configFileName, fileName);
+                        if (!configResult.success) {
+                            return { configFileName: configFileName, configFileErrors: configResult.errors };
+                        }
+                        else {
+                            this.log("Opened configuration file " + configFileName, "Info");
+                            this.configuredProjects.push(configResult.project);
+                            if (configResult.errors && configResult.errors.length > 0) {
+                                return { configFileName: configFileName, configFileErrors: configResult.errors };
+                            }
+                        }
+                    }
+                    else {
+                        this.updateConfiguredProject(project);
+                    }
+                }
+                else {
+                    this.log("No config files found.");
+                }
+                return configFileName ? { configFileName: configFileName } : {};
+            };
+            ProjectService.prototype.closeClientFile = function (filename) {
+                var info = ts.lookUp(this.filenameToScriptInfo, filename);
+                if (info) {
+                    this.closeOpenFile(info);
+                    info.isOpen = false;
+                }
+                this.printProjects();
+            };
+            ProjectService.prototype.getProjectForFile = function (filename) {
+                var scriptInfo = ts.lookUp(this.filenameToScriptInfo, filename);
+                if (scriptInfo) {
+                    return scriptInfo.defaultProject;
+                }
+            };
+            ProjectService.prototype.printProjectsForFile = function (filename) {
+                var scriptInfo = ts.lookUp(this.filenameToScriptInfo, filename);
+                if (scriptInfo) {
+                    this.psLogger.startGroup();
+                    this.psLogger.info("Projects for " + filename);
+                    var projects = this.findReferencingProjects(scriptInfo);
+                    for (var i = 0, len = projects.length; i < len; i++) {
+                        this.psLogger.info("Project " + i.toString());
+                    }
+                    this.psLogger.endGroup();
+                }
+                else {
+                    this.psLogger.info(filename + " not in any project");
+                }
+            };
+            ProjectService.prototype.printProjects = function () {
+                if (!this.psLogger.isVerbose()) {
+                    return;
+                }
+                this.psLogger.startGroup();
+                for (var i = 0, len = this.inferredProjects.length; i < len; i++) {
+                    var project = this.inferredProjects[i];
+                    project.updateGraph();
+                    this.psLogger.info("Project " + i.toString());
+                    this.psLogger.info(project.filesToString());
+                    this.psLogger.info("-----------------------------------------------");
+                }
+                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
+                    var project = this.configuredProjects[i];
+                    project.updateGraph();
+                    this.psLogger.info("Project (configured) " + (i + this.inferredProjects.length).toString());
+                    this.psLogger.info(project.filesToString());
+                    this.psLogger.info("-----------------------------------------------");
+                }
+                this.psLogger.info("Open file roots of inferred projects: ");
+                for (var i = 0, len = this.openFileRoots.length; i < len; i++) {
+                    this.psLogger.info(this.openFileRoots[i].fileName);
+                }
+                this.psLogger.info("Open files referenced by inferred or configured projects: ");
+                for (var i = 0, len = this.openFilesReferenced.length; i < len; i++) {
+                    var fileInfo = this.openFilesReferenced[i].fileName;
+                    if (this.openFilesReferenced[i].defaultProject.isConfiguredProject()) {
+                        fileInfo += " (configured)";
+                    }
+                    this.psLogger.info(fileInfo);
+                }
+                this.psLogger.info("Open file roots of configured projects: ");
+                for (var i = 0, len = this.openFileRootsConfigured.length; i < len; i++) {
+                    this.psLogger.info(this.openFileRootsConfigured[i].fileName);
+                }
+                this.psLogger.endGroup();
+            };
+            ProjectService.prototype.configProjectIsActive = function (fileName) {
+                return this.findConfiguredProjectByConfigFile(fileName) === undefined;
+            };
+            ProjectService.prototype.findConfiguredProjectByConfigFile = function (configFileName) {
+                for (var i = 0, len = this.configuredProjects.length; i < len; i++) {
+                    if (this.configuredProjects[i].projectFilename == configFileName) {
+                        return this.configuredProjects[i];
+                    }
+                }
+                return undefined;
+            };
+            ProjectService.prototype.configFileToProjectOptions = function (configFilename) {
+                configFilename = ts.normalizePath(configFilename);
+                var dirPath = ts.getDirectoryPath(configFilename);
+                var contents = this.host.readFile(configFilename);
+                var rawConfig = ts.parseConfigFileTextToJson(configFilename, contents);
+                if (rawConfig.error) {
+                    return { succeeded: false, errors: [rawConfig.error] };
+                }
+                else {
+                    var parsedCommandLine = ts.parseJsonConfigFileContent(rawConfig.config, this.host, dirPath, {}, configFilename);
+                    ts.Debug.assert(!!parsedCommandLine.fileNames);
+                    if (parsedCommandLine.errors && (parsedCommandLine.errors.length > 0)) {
+                        return { succeeded: false, errors: parsedCommandLine.errors };
+                    }
+                    else if (parsedCommandLine.fileNames.length === 0) {
+                        var error = ts.createCompilerDiagnostic(ts.Diagnostics.The_config_file_0_found_doesn_t_contain_any_source_files, configFilename);
+                        return { succeeded: false, errors: [error] };
+                    }
+                    else {
+                        var projectOptions = {
+                            files: parsedCommandLine.fileNames,
+                            compilerOptions: parsedCommandLine.options
+                        };
+                        return { succeeded: true, projectOptions: projectOptions };
+                    }
+                }
+            };
+            ProjectService.prototype.openConfigFile = function (configFilename, clientFileName) {
+                var _this = this;
+                var _a = this.configFileToProjectOptions(configFilename), succeeded = _a.succeeded, projectOptions = _a.projectOptions, errors = _a.errors;
+                if (!succeeded) {
+                    return { success: false, errors: errors };
+                }
+                else {
+                    var project_1 = this.createProject(configFilename, projectOptions);
+                    var errors_1;
+                    for (var _i = 0, _b = projectOptions.files; _i < _b.length; _i++) {
+                        var rootFilename = _b[_i];
+                        if (this.host.fileExists(rootFilename)) {
+                            var info = this.openFile(rootFilename, clientFileName == rootFilename);
+                            project_1.addRoot(info);
+                        }
+                        else {
+                            (errors_1 || (errors_1 = [])).push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, rootFilename));
+                        }
+                    }
+                    project_1.finishGraph();
+                    project_1.projectFileWatcher = this.host.watchFile(configFilename, function (_) { return _this.watchedProjectConfigFileChanged(project_1); });
+                    this.log("Add recursive watcher for: " + ts.getDirectoryPath(configFilename));
+                    project_1.directoryWatcher = this.host.watchDirectory(ts.getDirectoryPath(configFilename), function (path) { return _this.directoryWatchedForSourceFilesChanged(project_1, path); }, true);
+                    return { success: true, project: project_1, errors: errors_1 };
+                }
+            };
+            ProjectService.prototype.updateConfiguredProject = function (project) {
+                var _this = this;
+                if (!this.host.fileExists(project.projectFilename)) {
+                    this.log("Config file deleted");
+                    this.removeProject(project);
+                }
+                else {
+                    var _a = this.configFileToProjectOptions(project.projectFilename), succeeded = _a.succeeded, projectOptions = _a.projectOptions, errors = _a.errors;
+                    if (!succeeded) {
+                        return errors;
+                    }
+                    else {
+                        var oldFileNames_1 = project.compilerService.host.roots.map(function (info) { return info.fileName; });
+                        var newFileNames_1 = ts.filter(projectOptions.files, function (f) { return _this.host.fileExists(f); });
+                        var fileNamesToRemove = oldFileNames_1.filter(function (f) { return newFileNames_1.indexOf(f) < 0; });
+                        var fileNamesToAdd = newFileNames_1.filter(function (f) { return oldFileNames_1.indexOf(f) < 0; });
+                        for (var _i = 0, fileNamesToRemove_1 = fileNamesToRemove; _i < fileNamesToRemove_1.length; _i++) {
+                            var fileName = fileNamesToRemove_1[_i];
+                            var info = this.getScriptInfo(fileName);
+                            if (info) {
+                                project.removeRoot(info);
+                            }
+                        }
+                        for (var _b = 0, fileNamesToAdd_1 = fileNamesToAdd; _b < fileNamesToAdd_1.length; _b++) {
+                            var fileName = fileNamesToAdd_1[_b];
+                            var info = this.getScriptInfo(fileName);
+                            if (!info) {
+                                info = this.openFile(fileName, false);
+                            }
+                            else {
+                                if (info.isOpen) {
+                                    if (this.openFileRoots.indexOf(info) >= 0) {
+                                        this.openFileRoots = copyListRemovingItem(info, this.openFileRoots);
+                                        if (info.defaultProject && !info.defaultProject.isConfiguredProject()) {
+                                            this.removeProject(info.defaultProject);
+                                        }
+                                    }
+                                    if (this.openFilesReferenced.indexOf(info) >= 0) {
+                                        this.openFilesReferenced = copyListRemovingItem(info, this.openFilesReferenced);
+                                    }
+                                    this.openFileRootsConfigured.push(info);
+                                    info.defaultProject = project;
+                                }
+                            }
+                            project.addRoot(info);
+                        }
+                        project.setProjectOptions(projectOptions);
+                        project.finishGraph();
+                    }
+                }
+            };
+            ProjectService.prototype.createProject = function (projectFilename, projectOptions) {
+                var project = new Project(this, projectOptions);
+                project.projectFilename = projectFilename;
+                return project;
+            };
+            return ProjectService;
+        }());
+        server.ProjectService = ProjectService;
+        var CompilerService = (function () {
+            function CompilerService(project, opt) {
+                this.project = project;
+                this.documentRegistry = ts.createDocumentRegistry();
+                this.host = new LSHost(project.projectService.host, project);
+                if (opt) {
+                    this.setCompilerOptions(opt);
+                }
+                else {
+                    var defaultOpts = ts.getDefaultCompilerOptions();
+                    defaultOpts.allowNonTsExtensions = true;
+                    defaultOpts.allowJs = true;
+                    this.setCompilerOptions(defaultOpts);
+                }
+                this.languageService = ts.createLanguageService(this.host, this.documentRegistry);
+                this.classifier = ts.createClassifier();
+            }
+            CompilerService.prototype.setCompilerOptions = function (opt) {
+                this.settings = opt;
+                this.host.setCompilationSettings(opt);
+            };
+            CompilerService.prototype.isExternalModule = function (filename) {
+                var sourceFile = this.languageService.getNonBoundSourceFile(filename);
+                return ts.isExternalModule(sourceFile);
+            };
+            CompilerService.getDefaultFormatCodeOptions = function (host) {
+                return ts.clone({
+                    IndentSize: 4,
+                    TabSize: 4,
+                    NewLineCharacter: host.newLine || "\n",
+                    ConvertTabsToSpaces: true,
+                    IndentStyle: ts.IndentStyle.Smart,
+                    InsertSpaceAfterCommaDelimiter: true,
+                    InsertSpaceAfterSemicolonInForStatements: true,
+                    InsertSpaceBeforeAndAfterBinaryOperators: true,
+                    InsertSpaceAfterKeywordsInControlFlowStatements: true,
+                    InsertSpaceAfterFunctionKeywordForAnonymousFunctions: false,
+                    InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: false,
+                    InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: false,
+                    InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: false,
+                    PlaceOpenBraceOnNewLineForFunctions: false,
+                    PlaceOpenBraceOnNewLineForControlBlocks: false
+                });
+            };
+            return CompilerService;
+        }());
+        server.CompilerService = CompilerService;
+        (function (CharRangeSection) {
+            CharRangeSection[CharRangeSection["PreStart"] = 0] = "PreStart";
+            CharRangeSection[CharRangeSection["Start"] = 1] = "Start";
+            CharRangeSection[CharRangeSection["Entire"] = 2] = "Entire";
+            CharRangeSection[CharRangeSection["Mid"] = 3] = "Mid";
+            CharRangeSection[CharRangeSection["End"] = 4] = "End";
+            CharRangeSection[CharRangeSection["PostEnd"] = 5] = "PostEnd";
+        })(server.CharRangeSection || (server.CharRangeSection = {}));
+        var CharRangeSection = server.CharRangeSection;
+        var BaseLineIndexWalker = (function () {
+            function BaseLineIndexWalker() {
+                this.goSubtree = true;
+                this.done = false;
+            }
+            BaseLineIndexWalker.prototype.leaf = function (rangeStart, rangeLength, ll) {
+            };
+            return BaseLineIndexWalker;
+        }());
+        var EditWalker = (function (_super) {
+            __extends(EditWalker, _super);
+            function EditWalker() {
+                _super.call(this);
+                this.lineIndex = new LineIndex();
+                this.endBranch = [];
+                this.state = CharRangeSection.Entire;
+                this.initialText = "";
+                this.trailingText = "";
+                this.suppressTrailingText = false;
+                this.lineIndex.root = new LineNode();
+                this.startPath = [this.lineIndex.root];
+                this.stack = [this.lineIndex.root];
+            }
+            EditWalker.prototype.insertLines = function (insertedText) {
+                if (this.suppressTrailingText) {
+                    this.trailingText = "";
+                }
+                if (insertedText) {
+                    insertedText = this.initialText + insertedText + this.trailingText;
+                }
+                else {
+                    insertedText = this.initialText + this.trailingText;
+                }
+                var lm = LineIndex.linesFromText(insertedText);
+                var lines = lm.lines;
+                if (lines.length > 1) {
+                    if (lines[lines.length - 1] == "") {
+                        lines.length--;
+                    }
+                }
+                var branchParent;
+                var lastZeroCount;
+                for (var k = this.endBranch.length - 1; k >= 0; k--) {
+                    this.endBranch[k].updateCounts();
+                    if (this.endBranch[k].charCount() === 0) {
+                        lastZeroCount = this.endBranch[k];
+                        if (k > 0) {
+                            branchParent = this.endBranch[k - 1];
+                        }
+                        else {
+                            branchParent = this.branchNode;
+                        }
+                    }
+                }
+                if (lastZeroCount) {
+                    branchParent.remove(lastZeroCount);
+                }
+                var insertionNode = this.startPath[this.startPath.length - 2];
+                var leafNode = this.startPath[this.startPath.length - 1];
+                var len = lines.length;
+                if (len > 0) {
+                    leafNode.text = lines[0];
+                    if (len > 1) {
+                        var insertedNodes = new Array(len - 1);
+                        var startNode = leafNode;
+                        for (var i = 1, len_1 = lines.length; i < len_1; i++) {
+                            insertedNodes[i - 1] = new LineLeaf(lines[i]);
+                        }
+                        var pathIndex = this.startPath.length - 2;
+                        while (pathIndex >= 0) {
+                            insertionNode = this.startPath[pathIndex];
+                            insertedNodes = insertionNode.insertAt(startNode, insertedNodes);
+                            pathIndex--;
+                            startNode = insertionNode;
+                        }
+                        var insertedNodesLen = insertedNodes.length;
+                        while (insertedNodesLen > 0) {
+                            var newRoot = new LineNode();
+                            newRoot.add(this.lineIndex.root);
+                            insertedNodes = newRoot.insertAt(this.lineIndex.root, insertedNodes);
+                            insertedNodesLen = insertedNodes.length;
+                            this.lineIndex.root = newRoot;
+                        }
+                        this.lineIndex.root.updateCounts();
+                    }
+                    else {
+                        for (var j = this.startPath.length - 2; j >= 0; j--) {
+                            this.startPath[j].updateCounts();
+                        }
+                    }
+                }
+                else {
+                    insertionNode.remove(leafNode);
+                    for (var j = this.startPath.length - 2; j >= 0; j--) {
+                        this.startPath[j].updateCounts();
+                    }
+                }
+                return this.lineIndex;
+            };
+            EditWalker.prototype.post = function (relativeStart, relativeLength, lineCollection, parent, nodeType) {
+                if (lineCollection === this.lineCollectionAtBranch) {
+                    this.state = CharRangeSection.End;
+                }
+                this.stack.length--;
+                return undefined;
+            };
+            EditWalker.prototype.pre = function (relativeStart, relativeLength, lineCollection, parent, nodeType) {
+                var currentNode = this.stack[this.stack.length - 1];
+                if ((this.state === CharRangeSection.Entire) && (nodeType === CharRangeSection.Start)) {
+                    this.state = CharRangeSection.Start;
+                    this.branchNode = currentNode;
+                    this.lineCollectionAtBranch = lineCollection;
+                }
+                var child;
+                function fresh(node) {
+                    if (node.isLeaf()) {
+                        return new LineLeaf("");
+                    }
+                    else
+                        return new LineNode();
+                }
+                switch (nodeType) {
+                    case CharRangeSection.PreStart:
+                        this.goSubtree = false;
+                        if (this.state !== CharRangeSection.End) {
+                            currentNode.add(lineCollection);
+                        }
+                        break;
+                    case CharRangeSection.Start:
+                        if (this.state === CharRangeSection.End) {
+                            this.goSubtree = false;
+                        }
+                        else {
+                            child = fresh(lineCollection);
+                            currentNode.add(child);
+                            this.startPath[this.startPath.length] = child;
+                        }
+                        break;
+                    case CharRangeSection.Entire:
+                        if (this.state !== CharRangeSection.End) {
+                            child = fresh(lineCollection);
+                            currentNode.add(child);
+                            this.startPath[this.startPath.length] = child;
+                        }
+                        else {
+                            if (!lineCollection.isLeaf()) {
+                                child = fresh(lineCollection);
+                                currentNode.add(child);
+                                this.endBranch[this.endBranch.length] = child;
+                            }
+                        }
+                        break;
+                    case CharRangeSection.Mid:
+                        this.goSubtree = false;
+                        break;
+                    case CharRangeSection.End:
+                        if (this.state !== CharRangeSection.End) {
+                            this.goSubtree = false;
+                        }
+                        else {
+                            if (!lineCollection.isLeaf()) {
+                                child = fresh(lineCollection);
+                                currentNode.add(child);
+                                this.endBranch[this.endBranch.length] = child;
+                            }
+                        }
+                        break;
+                    case CharRangeSection.PostEnd:
+                        this.goSubtree = false;
+                        if (this.state !== CharRangeSection.Start) {
+                            currentNode.add(lineCollection);
+                        }
+                        break;
+                }
+                if (this.goSubtree) {
+                    this.stack[this.stack.length] = child;
+                }
+                return lineCollection;
+            };
+            EditWalker.prototype.leaf = function (relativeStart, relativeLength, ll) {
+                if (this.state === CharRangeSection.Start) {
+                    this.initialText = ll.text.substring(0, relativeStart);
+                }
+                else if (this.state === CharRangeSection.Entire) {
+                    this.initialText = ll.text.substring(0, relativeStart);
+                    this.trailingText = ll.text.substring(relativeStart + relativeLength);
+                }
+                else {
+                    this.trailingText = ll.text.substring(relativeStart + relativeLength);
+                }
+            };
+            return EditWalker;
+        }(BaseLineIndexWalker));
+        var TextChange = (function () {
+            function TextChange(pos, deleteLen, insertedText) {
+                this.pos = pos;
+                this.deleteLen = deleteLen;
+                this.insertedText = insertedText;
+            }
+            TextChange.prototype.getTextChangeRange = function () {
+                return ts.createTextChangeRange(ts.createTextSpan(this.pos, this.deleteLen), this.insertedText ? this.insertedText.length : 0);
+            };
+            return TextChange;
+        }());
+        server.TextChange = TextChange;
+        var ScriptVersionCache = (function () {
+            function ScriptVersionCache() {
+                this.changes = [];
+                this.versions = [];
+                this.minVersion = 0;
+                this.currentVersion = 0;
+            }
+            ScriptVersionCache.prototype.edit = function (pos, deleteLen, insertedText) {
+                this.changes[this.changes.length] = new TextChange(pos, deleteLen, insertedText);
+                if ((this.changes.length > ScriptVersionCache.changeNumberThreshold) ||
+                    (deleteLen > ScriptVersionCache.changeLengthThreshold) ||
+                    (insertedText && (insertedText.length > ScriptVersionCache.changeLengthThreshold))) {
+                    this.getSnapshot();
+                }
+            };
+            ScriptVersionCache.prototype.latest = function () {
+                return this.versions[this.currentVersion];
+            };
+            ScriptVersionCache.prototype.latestVersion = function () {
+                if (this.changes.length > 0) {
+                    this.getSnapshot();
+                }
+                return this.currentVersion;
+            };
+            ScriptVersionCache.prototype.reloadFromFile = function (filename, cb) {
+                var content = this.host.readFile(filename);
+                if (!content) {
+                    content = "";
+                }
+                this.reload(content);
+                if (cb)
+                    cb();
+            };
+            ScriptVersionCache.prototype.reload = function (script) {
+                this.currentVersion++;
+                this.changes = [];
+                var snap = new LineIndexSnapshot(this.currentVersion, this);
+                this.versions[this.currentVersion] = snap;
+                snap.index = new LineIndex();
+                var lm = LineIndex.linesFromText(script);
+                snap.index.load(lm.lines);
+                for (var i = this.minVersion; i < this.currentVersion; i++) {
+                    this.versions[i] = undefined;
+                }
+                this.minVersion = this.currentVersion;
+            };
+            ScriptVersionCache.prototype.getSnapshot = function () {
+                var snap = this.versions[this.currentVersion];
+                if (this.changes.length > 0) {
+                    var snapIndex = this.latest().index;
+                    for (var i = 0, len = this.changes.length; i < len; i++) {
+                        var change = this.changes[i];
+                        snapIndex = snapIndex.edit(change.pos, change.deleteLen, change.insertedText);
+                    }
+                    snap = new LineIndexSnapshot(this.currentVersion + 1, this);
+                    snap.index = snapIndex;
+                    snap.changesSincePreviousVersion = this.changes;
+                    this.currentVersion = snap.version;
+                    this.versions[snap.version] = snap;
+                    this.changes = [];
+                    if ((this.currentVersion - this.minVersion) >= ScriptVersionCache.maxVersions) {
+                        var oldMin = this.minVersion;
+                        this.minVersion = (this.currentVersion - ScriptVersionCache.maxVersions) + 1;
+                        for (var j = oldMin; j < this.minVersion; j++) {
+                            this.versions[j] = undefined;
+                        }
+                    }
+                }
+                return snap;
+            };
+            ScriptVersionCache.prototype.getTextChangesBetweenVersions = function (oldVersion, newVersion) {
+                if (oldVersion < newVersion) {
+                    if (oldVersion >= this.minVersion) {
+                        var textChangeRanges = [];
+                        for (var i = oldVersion + 1; i <= newVersion; i++) {
+                            var snap = this.versions[i];
+                            for (var j = 0, len = snap.changesSincePreviousVersion.length; j < len; j++) {
+                                var textChange = snap.changesSincePreviousVersion[j];
+                                textChangeRanges[textChangeRanges.length] = textChange.getTextChangeRange();
+                            }
+                        }
+                        return ts.collapseTextChangeRangesAcrossMultipleVersions(textChangeRanges);
+                    }
+                    else {
+                        return undefined;
+                    }
+                }
+                else {
+                    return ts.unchangedTextChangeRange;
+                }
+            };
+            ScriptVersionCache.fromString = function (host, script) {
+                var svc = new ScriptVersionCache();
+                var snap = new LineIndexSnapshot(0, svc);
+                svc.versions[svc.currentVersion] = snap;
+                svc.host = host;
+                snap.index = new LineIndex();
+                var lm = LineIndex.linesFromText(script);
+                snap.index.load(lm.lines);
+                return svc;
+            };
+            ScriptVersionCache.changeNumberThreshold = 8;
+            ScriptVersionCache.changeLengthThreshold = 256;
+            ScriptVersionCache.maxVersions = 8;
+            return ScriptVersionCache;
+        }());
+        server.ScriptVersionCache = ScriptVersionCache;
+        var LineIndexSnapshot = (function () {
+            function LineIndexSnapshot(version, cache) {
+                this.version = version;
+                this.cache = cache;
+                this.changesSincePreviousVersion = [];
+            }
+            LineIndexSnapshot.prototype.getText = function (rangeStart, rangeEnd) {
+                return this.index.getText(rangeStart, rangeEnd - rangeStart);
+            };
+            LineIndexSnapshot.prototype.getLength = function () {
+                return this.index.root.charCount();
+            };
+            LineIndexSnapshot.prototype.getLineStartPositions = function () {
+                var starts = [-1];
+                var count = 1;
+                var pos = 0;
+                this.index.every(function (ll, s, len) {
+                    starts[count] = pos;
+                    count++;
+                    pos += ll.text.length;
+                    return true;
+                }, 0);
+                return starts;
+            };
+            LineIndexSnapshot.prototype.getLineMapper = function () {
+                var _this = this;
+                return function (line) {
+                    return _this.index.lineNumberToInfo(line).offset;
+                };
+            };
+            LineIndexSnapshot.prototype.getTextChangeRangeSinceVersion = function (scriptVersion) {
+                if (this.version <= scriptVersion) {
+                    return ts.unchangedTextChangeRange;
+                }
+                else {
+                    return this.cache.getTextChangesBetweenVersions(scriptVersion, this.version);
+                }
+            };
+            LineIndexSnapshot.prototype.getChangeRange = function (oldSnapshot) {
+                var oldSnap = oldSnapshot;
+                return this.getTextChangeRangeSinceVersion(oldSnap.version);
+            };
+            return LineIndexSnapshot;
+        }());
+        server.LineIndexSnapshot = LineIndexSnapshot;
+        var LineIndex = (function () {
+            function LineIndex() {
+                this.checkEdits = false;
+            }
+            LineIndex.prototype.charOffsetToLineNumberAndPos = function (charOffset) {
+                return this.root.charOffsetToLineNumberAndPos(1, charOffset);
+            };
+            LineIndex.prototype.lineNumberToInfo = function (lineNumber) {
+                var lineCount = this.root.lineCount();
+                if (lineNumber <= lineCount) {
+                    var lineInfo = this.root.lineNumberToInfo(lineNumber, 0);
+                    lineInfo.line = lineNumber;
+                    return lineInfo;
+                }
+                else {
+                    return {
+                        line: lineNumber,
+                        offset: this.root.charCount()
+                    };
+                }
+            };
+            LineIndex.prototype.load = function (lines) {
+                if (lines.length > 0) {
+                    var leaves = [];
+                    for (var i = 0, len = lines.length; i < len; i++) {
+                        leaves[i] = new LineLeaf(lines[i]);
+                    }
+                    this.root = LineIndex.buildTreeFromBottom(leaves);
+                }
+                else {
+                    this.root = new LineNode();
+                }
+            };
+            LineIndex.prototype.walk = function (rangeStart, rangeLength, walkFns) {
+                this.root.walk(rangeStart, rangeLength, walkFns);
+            };
+            LineIndex.prototype.getText = function (rangeStart, rangeLength) {
+                var accum = "";
+                if ((rangeLength > 0) && (rangeStart < this.root.charCount())) {
+                    this.walk(rangeStart, rangeLength, {
+                        goSubtree: true,
+                        done: false,
+                        leaf: function (relativeStart, relativeLength, ll) {
+                            accum = accum.concat(ll.text.substring(relativeStart, relativeStart + relativeLength));
+                        }
+                    });
+                }
+                return accum;
+            };
+            LineIndex.prototype.getLength = function () {
+                return this.root.charCount();
+            };
+            LineIndex.prototype.every = function (f, rangeStart, rangeEnd) {
+                if (!rangeEnd) {
+                    rangeEnd = this.root.charCount();
+                }
+                var walkFns = {
+                    goSubtree: true,
+                    done: false,
+                    leaf: function (relativeStart, relativeLength, ll) {
+                        if (!f(ll, relativeStart, relativeLength)) {
+                            this.done = true;
+                        }
+                    }
+                };
+                this.walk(rangeStart, rangeEnd - rangeStart, walkFns);
+                return !walkFns.done;
+            };
+            LineIndex.prototype.edit = function (pos, deleteLength, newText) {
+                function editFlat(source, s, dl, nt) {
+                    if (nt === void 0) { nt = ""; }
+                    return source.substring(0, s) + nt + source.substring(s + dl, source.length);
+                }
+                if (this.root.charCount() === 0) {
+                    if (newText) {
+                        this.load(LineIndex.linesFromText(newText).lines);
+                        return this;
+                    }
+                }
+                else {
+                    var checkText = void 0;
+                    if (this.checkEdits) {
+                        checkText = editFlat(this.getText(0, this.root.charCount()), pos, deleteLength, newText);
+                    }
+                    var walker = new EditWalker();
+                    if (pos >= this.root.charCount()) {
+                        pos = this.root.charCount() - 1;
+                        var endString = this.getText(pos, 1);
+                        if (newText) {
+                            newText = endString + newText;
+                        }
+                        else {
+                            newText = endString;
+                        }
+                        deleteLength = 0;
+                        walker.suppressTrailingText = true;
+                    }
+                    else if (deleteLength > 0) {
+                        var e = pos + deleteLength;
+                        var lineInfo = this.charOffsetToLineNumberAndPos(e);
+                        if ((lineInfo && (lineInfo.offset === 0))) {
+                            deleteLength += lineInfo.text.length;
+                            if (newText) {
+                                newText = newText + lineInfo.text;
+                            }
+                            else {
+                                newText = lineInfo.text;
+                            }
+                        }
+                    }
+                    if (pos < this.root.charCount()) {
+                        this.root.walk(pos, deleteLength, walker);
+                        walker.insertLines(newText);
+                    }
+                    if (this.checkEdits) {
+                        var updatedText = this.getText(0, this.root.charCount());
+                        ts.Debug.assert(checkText == updatedText, "buffer edit mismatch");
+                    }
+                    return walker.lineIndex;
+                }
+            };
+            LineIndex.buildTreeFromBottom = function (nodes) {
+                var nodeCount = Math.ceil(nodes.length / lineCollectionCapacity);
+                var interiorNodes = [];
+                var nodeIndex = 0;
+                for (var i = 0; i < nodeCount; i++) {
+                    interiorNodes[i] = new LineNode();
+                    var charCount = 0;
+                    var lineCount = 0;
+                    for (var j = 0; j < lineCollectionCapacity; j++) {
+                        if (nodeIndex < nodes.length) {
+                            interiorNodes[i].add(nodes[nodeIndex]);
+                            charCount += nodes[nodeIndex].charCount();
+                            lineCount += nodes[nodeIndex].lineCount();
+                        }
+                        else {
+                            break;
+                        }
+                        nodeIndex++;
+                    }
+                    interiorNodes[i].totalChars = charCount;
+                    interiorNodes[i].totalLines = lineCount;
+                }
+                if (interiorNodes.length === 1) {
+                    return interiorNodes[0];
+                }
+                else {
+                    return this.buildTreeFromBottom(interiorNodes);
+                }
+            };
+            LineIndex.linesFromText = function (text) {
+                var lineStarts = ts.computeLineStarts(text);
+                if (lineStarts.length === 0) {
+                    return { lines: [], lineMap: lineStarts };
+                }
+                var lines = new Array(lineStarts.length);
+                var lc = lineStarts.length - 1;
+                for (var lmi = 0; lmi < lc; lmi++) {
+                    lines[lmi] = text.substring(lineStarts[lmi], lineStarts[lmi + 1]);
+                }
+                var endText = text.substring(lineStarts[lc]);
+                if (endText.length > 0) {
+                    lines[lc] = endText;
+                }
+                else {
+                    lines.length--;
+                }
+                return { lines: lines, lineMap: lineStarts };
+            };
+            return LineIndex;
+        }());
+        server.LineIndex = LineIndex;
+        var LineNode = (function () {
+            function LineNode() {
+                this.totalChars = 0;
+                this.totalLines = 0;
+                this.children = [];
+            }
+            LineNode.prototype.isLeaf = function () {
+                return false;
+            };
+            LineNode.prototype.updateCounts = function () {
+                this.totalChars = 0;
+                this.totalLines = 0;
+                for (var i = 0, len = this.children.length; i < len; i++) {
+                    var child = this.children[i];
+                    this.totalChars += child.charCount();
+                    this.totalLines += child.lineCount();
+                }
+            };
+            LineNode.prototype.execWalk = function (rangeStart, rangeLength, walkFns, childIndex, nodeType) {
+                if (walkFns.pre) {
+                    walkFns.pre(rangeStart, rangeLength, this.children[childIndex], this, nodeType);
+                }
+                if (walkFns.goSubtree) {
+                    this.children[childIndex].walk(rangeStart, rangeLength, walkFns);
+                    if (walkFns.post) {
+                        walkFns.post(rangeStart, rangeLength, this.children[childIndex], this, nodeType);
+                    }
+                }
+                else {
+                    walkFns.goSubtree = true;
+                }
+                return walkFns.done;
+            };
+            LineNode.prototype.skipChild = function (relativeStart, relativeLength, childIndex, walkFns, nodeType) {
+                if (walkFns.pre && (!walkFns.done)) {
+                    walkFns.pre(relativeStart, relativeLength, this.children[childIndex], this, nodeType);
+                    walkFns.goSubtree = true;
+                }
+            };
+            LineNode.prototype.walk = function (rangeStart, rangeLength, walkFns) {
+                var childIndex = 0;
+                var child = this.children[0];
+                var childCharCount = child.charCount();
+                var adjustedStart = rangeStart;
+                while (adjustedStart >= childCharCount) {
+                    this.skipChild(adjustedStart, rangeLength, childIndex, walkFns, CharRangeSection.PreStart);
+                    adjustedStart -= childCharCount;
+                    childIndex++;
+                    child = this.children[childIndex];
+                    childCharCount = child.charCount();
+                }
+                if ((adjustedStart + rangeLength) <= childCharCount) {
+                    if (this.execWalk(adjustedStart, rangeLength, walkFns, childIndex, CharRangeSection.Entire)) {
+                        return;
+                    }
+                }
+                else {
+                    if (this.execWalk(adjustedStart, childCharCount - adjustedStart, walkFns, childIndex, CharRangeSection.Start)) {
+                        return;
+                    }
+                    var adjustedLength = rangeLength - (childCharCount - adjustedStart);
+                    childIndex++;
+                    child = this.children[childIndex];
+                    childCharCount = child.charCount();
+                    while (adjustedLength > childCharCount) {
+                        if (this.execWalk(0, childCharCount, walkFns, childIndex, CharRangeSection.Mid)) {
+                            return;
+                        }
+                        adjustedLength -= childCharCount;
+                        childIndex++;
+                        child = this.children[childIndex];
+                        childCharCount = child.charCount();
+                    }
+                    if (adjustedLength > 0) {
+                        if (this.execWalk(0, adjustedLength, walkFns, childIndex, CharRangeSection.End)) {
+                            return;
+                        }
+                    }
+                }
+                if (walkFns.pre) {
+                    var clen = this.children.length;
+                    if (childIndex < (clen - 1)) {
+                        for (var ej = childIndex + 1; ej < clen; ej++) {
+                            this.skipChild(0, 0, ej, walkFns, CharRangeSection.PostEnd);
+                        }
+                    }
+                }
+            };
+            LineNode.prototype.charOffsetToLineNumberAndPos = function (lineNumber, charOffset) {
+                var childInfo = this.childFromCharOffset(lineNumber, charOffset);
+                if (!childInfo.child) {
+                    return {
+                        line: lineNumber,
+                        offset: charOffset
+                    };
+                }
+                else if (childInfo.childIndex < this.children.length) {
+                    if (childInfo.child.isLeaf()) {
+                        return {
+                            line: childInfo.lineNumber,
+                            offset: childInfo.charOffset,
+                            text: (childInfo.child).text,
+                            leaf: (childInfo.child)
+                        };
+                    }
+                    else {
+                        var lineNode = (childInfo.child);
+                        return lineNode.charOffsetToLineNumberAndPos(childInfo.lineNumber, childInfo.charOffset);
+                    }
+                }
+                else {
+                    var lineInfo = this.lineNumberToInfo(this.lineCount(), 0);
+                    return { line: this.lineCount(), offset: lineInfo.leaf.charCount() };
+                }
+            };
+            LineNode.prototype.lineNumberToInfo = function (lineNumber, charOffset) {
+                var childInfo = this.childFromLineNumber(lineNumber, charOffset);
+                if (!childInfo.child) {
+                    return {
+                        line: lineNumber,
+                        offset: charOffset
+                    };
+                }
+                else if (childInfo.child.isLeaf()) {
+                    return {
+                        line: lineNumber,
+                        offset: childInfo.charOffset,
+                        text: (childInfo.child).text,
+                        leaf: (childInfo.child)
+                    };
+                }
+                else {
+                    var lineNode = (childInfo.child);
+                    return lineNode.lineNumberToInfo(childInfo.relativeLineNumber, childInfo.charOffset);
+                }
+            };
+            LineNode.prototype.childFromLineNumber = function (lineNumber, charOffset) {
+                var child;
+                var relativeLineNumber = lineNumber;
+                var i;
+                var len;
+                for (i = 0, len = this.children.length; i < len; i++) {
+                    child = this.children[i];
+                    var childLineCount = child.lineCount();
+                    if (childLineCount >= relativeLineNumber) {
+                        break;
+                    }
+                    else {
+                        relativeLineNumber -= childLineCount;
+                        charOffset += child.charCount();
+                    }
+                }
+                return {
+                    child: child,
+                    childIndex: i,
+                    relativeLineNumber: relativeLineNumber,
+                    charOffset: charOffset
+                };
+            };
+            LineNode.prototype.childFromCharOffset = function (lineNumber, charOffset) {
+                var child;
+                var i;
+                var len;
+                for (i = 0, len = this.children.length; i < len; i++) {
+                    child = this.children[i];
+                    if (child.charCount() > charOffset) {
+                        break;
+                    }
+                    else {
+                        charOffset -= child.charCount();
+                        lineNumber += child.lineCount();
+                    }
+                }
+                return {
+                    child: child,
+                    childIndex: i,
+                    charOffset: charOffset,
+                    lineNumber: lineNumber
+                };
+            };
+            LineNode.prototype.splitAfter = function (childIndex) {
+                var splitNode;
+                var clen = this.children.length;
+                childIndex++;
+                var endLength = childIndex;
+                if (childIndex < clen) {
+                    splitNode = new LineNode();
+                    while (childIndex < clen) {
+                        splitNode.add(this.children[childIndex]);
+                        childIndex++;
+                    }
+                    splitNode.updateCounts();
+                }
+                this.children.length = endLength;
+                return splitNode;
+            };
+            LineNode.prototype.remove = function (child) {
+                var childIndex = this.findChildIndex(child);
+                var clen = this.children.length;
+                if (childIndex < (clen - 1)) {
+                    for (var i = childIndex; i < (clen - 1); i++) {
+                        this.children[i] = this.children[i + 1];
+                    }
+                }
+                this.children.length--;
+            };
+            LineNode.prototype.findChildIndex = function (child) {
+                var childIndex = 0;
+                var clen = this.children.length;
+                while ((this.children[childIndex] !== child) && (childIndex < clen))
+                    childIndex++;
+                return childIndex;
+            };
+            LineNode.prototype.insertAt = function (child, nodes) {
+                var childIndex = this.findChildIndex(child);
+                var clen = this.children.length;
+                var nodeCount = nodes.length;
+                if ((clen < lineCollectionCapacity) && (childIndex === (clen - 1)) && (nodeCount === 1)) {
+                    this.add(nodes[0]);
+                    this.updateCounts();
+                    return [];
+                }
+                else {
+                    var shiftNode = this.splitAfter(childIndex);
+                    var nodeIndex = 0;
+                    childIndex++;
+                    while ((childIndex < lineCollectionCapacity) && (nodeIndex < nodeCount)) {
+                        this.children[childIndex] = nodes[nodeIndex];
+                        childIndex++;
+                        nodeIndex++;
+                    }
+                    var splitNodes = [];
+                    var splitNodeCount = 0;
+                    if (nodeIndex < nodeCount) {
+                        splitNodeCount = Math.ceil((nodeCount - nodeIndex) / lineCollectionCapacity);
+                        splitNodes = new Array(splitNodeCount);
+                        var splitNodeIndex = 0;
+                        for (var i = 0; i < splitNodeCount; i++) {
+                            splitNodes[i] = new LineNode();
+                        }
+                        var splitNode = splitNodes[0];
+                        while (nodeIndex < nodeCount) {
+                            splitNode.add(nodes[nodeIndex]);
+                            nodeIndex++;
+                            if (splitNode.children.length === lineCollectionCapacity) {
+                                splitNodeIndex++;
+                                splitNode = splitNodes[splitNodeIndex];
+                            }
+                        }
+                        for (var i = splitNodes.length - 1; i >= 0; i--) {
+                            if (splitNodes[i].children.length === 0) {
+                                splitNodes.length--;
+                            }
+                        }
+                    }
+                    if (shiftNode) {
+                        splitNodes[splitNodes.length] = shiftNode;
+                    }
+                    this.updateCounts();
+                    for (var i = 0; i < splitNodeCount; i++) {
+                        splitNodes[i].updateCounts();
+                    }
+                    return splitNodes;
+                }
+            };
+            LineNode.prototype.add = function (collection) {
+                this.children[this.children.length] = collection;
+                return (this.children.length < lineCollectionCapacity);
+            };
+            LineNode.prototype.charCount = function () {
+                return this.totalChars;
+            };
+            LineNode.prototype.lineCount = function () {
+                return this.totalLines;
+            };
+            return LineNode;
+        }());
+        server.LineNode = LineNode;
+        var LineLeaf = (function () {
+            function LineLeaf(text) {
+                this.text = text;
+            }
+            LineLeaf.prototype.setUdata = function (data) {
+                this.udata = data;
+            };
+            LineLeaf.prototype.getUdata = function () {
+                return this.udata;
+            };
+            LineLeaf.prototype.isLeaf = function () {
+                return true;
+            };
+            LineLeaf.prototype.walk = function (rangeStart, rangeLength, walkFns) {
+                walkFns.leaf(rangeStart, rangeLength, this);
+            };
+            LineLeaf.prototype.charCount = function () {
+                return this.text.length;
+            };
+            LineLeaf.prototype.lineCount = function () {
+                return 1;
+            };
+            return LineLeaf;
+        }());
+        server.LineLeaf = LineLeaf;
+    })(server = ts.server || (ts.server = {}));
+})(ts || (ts = {}));
+var debugObjectHost = this;
+var ts;
+(function (ts) {
+    function logInternalError(logger, err) {
+        if (logger) {
+            logger.log("*INTERNAL ERROR* - Exception in typescript services: " + err.message);
+        }
+    }
+    var ScriptSnapshotShimAdapter = (function () {
+        function ScriptSnapshotShimAdapter(scriptSnapshotShim) {
+            this.scriptSnapshotShim = scriptSnapshotShim;
+        }
+        ScriptSnapshotShimAdapter.prototype.getText = function (start, end) {
+            return this.scriptSnapshotShim.getText(start, end);
+        };
+        ScriptSnapshotShimAdapter.prototype.getLength = function () {
+            return this.scriptSnapshotShim.getLength();
+        };
+        ScriptSnapshotShimAdapter.prototype.getChangeRange = function (oldSnapshot) {
+            var oldSnapshotShim = oldSnapshot;
+            var encoded = this.scriptSnapshotShim.getChangeRange(oldSnapshotShim.scriptSnapshotShim);
+            if (encoded == null) {
+                return null;
+            }
+            var decoded = JSON.parse(encoded);
+            return ts.createTextChangeRange(ts.createTextSpan(decoded.span.start, decoded.span.length), decoded.newLength);
+        };
+        ScriptSnapshotShimAdapter.prototype.dispose = function () {
+            if ("dispose" in this.scriptSnapshotShim) {
+                this.scriptSnapshotShim.dispose();
+            }
+        };
+        return ScriptSnapshotShimAdapter;
+    }());
+    var LanguageServiceShimHostAdapter = (function () {
+        function LanguageServiceShimHostAdapter(shimHost) {
+            var _this = this;
+            this.shimHost = shimHost;
+            this.loggingEnabled = false;
+            this.tracingEnabled = false;
+            if ("getModuleResolutionsForFile" in this.shimHost) {
+                this.resolveModuleNames = function (moduleNames, containingFile) {
+                    var resolutionsInFile = JSON.parse(_this.shimHost.getModuleResolutionsForFile(containingFile));
+                    return ts.map(moduleNames, function (name) {
+                        var result = ts.lookUp(resolutionsInFile, name);
+                        return result ? { resolvedFileName: result } : undefined;
+                    });
+                };
+            }
+            if ("directoryExists" in this.shimHost) {
+                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
+            }
+            if ("getTypeReferenceDirectiveResolutionsForFile" in this.shimHost) {
+                this.resolveTypeReferenceDirectives = function (typeDirectiveNames, containingFile) {
+                    var typeDirectivesForFile = JSON.parse(_this.shimHost.getTypeReferenceDirectiveResolutionsForFile(containingFile));
+                    return ts.map(typeDirectiveNames, function (name) { return ts.lookUp(typeDirectivesForFile, name); });
+                };
+            }
+        }
+        LanguageServiceShimHostAdapter.prototype.log = function (s) {
+            if (this.loggingEnabled) {
+                this.shimHost.log(s);
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.trace = function (s) {
+            if (this.tracingEnabled) {
+                this.shimHost.trace(s);
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.error = function (s) {
+            this.shimHost.error(s);
+        };
+        LanguageServiceShimHostAdapter.prototype.getProjectVersion = function () {
+            if (!this.shimHost.getProjectVersion) {
+                return undefined;
+            }
+            return this.shimHost.getProjectVersion();
+        };
+        LanguageServiceShimHostAdapter.prototype.useCaseSensitiveFileNames = function () {
+            return this.shimHost.useCaseSensitiveFileNames ? this.shimHost.useCaseSensitiveFileNames() : false;
+        };
+        LanguageServiceShimHostAdapter.prototype.getCompilationSettings = function () {
+            var settingsJson = this.shimHost.getCompilationSettings();
+            if (settingsJson == null || settingsJson == "") {
+                throw Error("LanguageServiceShimHostAdapter.getCompilationSettings: empty compilationSettings");
+            }
+            return JSON.parse(settingsJson);
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptFileNames = function () {
+            var encoded = this.shimHost.getScriptFileNames();
+            return this.files = JSON.parse(encoded);
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptSnapshot = function (fileName) {
+            var scriptSnapshot = this.shimHost.getScriptSnapshot(fileName);
+            return scriptSnapshot && new ScriptSnapshotShimAdapter(scriptSnapshot);
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptKind = function (fileName) {
+            if ("getScriptKind" in this.shimHost) {
+                return this.shimHost.getScriptKind(fileName);
+            }
+            else {
+                return 0;
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptVersion = function (fileName) {
+            return this.shimHost.getScriptVersion(fileName);
+        };
+        LanguageServiceShimHostAdapter.prototype.getLocalizedDiagnosticMessages = function () {
+            var diagnosticMessagesJson = this.shimHost.getLocalizedDiagnosticMessages();
+            if (diagnosticMessagesJson == null || diagnosticMessagesJson == "") {
+                return null;
+            }
+            try {
+                return JSON.parse(diagnosticMessagesJson);
+            }
+            catch (e) {
+                this.log(e.description || "diagnosticMessages.generated.json has invalid JSON format");
+                return null;
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.getCancellationToken = function () {
+            var hostCancellationToken = this.shimHost.getCancellationToken();
+            return new ThrottledCancellationToken(hostCancellationToken);
+        };
+        LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
+            return this.shimHost.getCurrentDirectory();
+        };
+        LanguageServiceShimHostAdapter.prototype.getDirectories = function (path) {
+            return this.shimHost.getDirectories(path);
+        };
+        LanguageServiceShimHostAdapter.prototype.getDefaultLibFileName = function (options) {
+            return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
+        };
+        return LanguageServiceShimHostAdapter;
+    }());
+    ts.LanguageServiceShimHostAdapter = LanguageServiceShimHostAdapter;
+    var ThrottledCancellationToken = (function () {
+        function ThrottledCancellationToken(hostCancellationToken) {
+            this.hostCancellationToken = hostCancellationToken;
+            this.lastCancellationCheckTime = 0;
+        }
+        ThrottledCancellationToken.prototype.isCancellationRequested = function () {
+            var time = Date.now();
+            var duration = Math.abs(time - this.lastCancellationCheckTime);
+            if (duration > 10) {
+                this.lastCancellationCheckTime = time;
+                return this.hostCancellationToken.isCancellationRequested();
+            }
+            return false;
+        };
+        return ThrottledCancellationToken;
+    }());
+    var CoreServicesShimHostAdapter = (function () {
+        function CoreServicesShimHostAdapter(shimHost) {
+            var _this = this;
+            this.shimHost = shimHost;
+            if ("directoryExists" in this.shimHost) {
+                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
+            }
+            if ("realpath" in this.shimHost) {
+                this.realpath = function (path) { return _this.shimHost.realpath(path); };
+            }
+        }
+        CoreServicesShimHostAdapter.prototype.readDirectory = function (rootDir, extension, exclude, depth) {
+            var encoded;
+            try {
+                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude), depth);
+            }
+            catch (e) {
+                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude));
+            }
+            return JSON.parse(encoded);
+        };
+        CoreServicesShimHostAdapter.prototype.fileExists = function (fileName) {
+            return this.shimHost.fileExists(fileName);
+        };
+        CoreServicesShimHostAdapter.prototype.readFile = function (fileName) {
+            return this.shimHost.readFile(fileName);
+        };
+        return CoreServicesShimHostAdapter;
+    }());
+    ts.CoreServicesShimHostAdapter = CoreServicesShimHostAdapter;
+    function simpleForwardCall(logger, actionDescription, action, logPerformance) {
+        var start;
+        if (logPerformance) {
+            logger.log(actionDescription);
+            start = Date.now();
+        }
+        var result = action();
+        if (logPerformance) {
+            var end = Date.now();
+            logger.log(actionDescription + " completed in " + (end - start) + " msec");
+            if (typeof result === "string") {
+                var str = result;
+                if (str.length > 128) {
+                    str = str.substring(0, 128) + "...";
+                }
+                logger.log("  result.length=" + str.length + ", result='" + JSON.stringify(str) + "'");
+            }
+        }
+        return result;
+    }
+    function forwardJSONCall(logger, actionDescription, action, logPerformance) {
+        try {
+            var result = simpleForwardCall(logger, actionDescription, action, logPerformance);
+            return JSON.stringify({ result: result });
+        }
+        catch (err) {
+            if (err instanceof ts.OperationCanceledException) {
+                return JSON.stringify({ canceled: true });
+            }
+            logInternalError(logger, err);
+            err.description = actionDescription;
+            return JSON.stringify({ error: err });
+        }
+    }
+    var ShimBase = (function () {
+        function ShimBase(factory) {
+            this.factory = factory;
+            factory.registerShim(this);
+        }
+        ShimBase.prototype.dispose = function (dummy) {
+            this.factory.unregisterShim(this);
+        };
+        return ShimBase;
+    }());
+    function realizeDiagnostics(diagnostics, newLine) {
+        return diagnostics.map(function (d) { return realizeDiagnostic(d, newLine); });
+    }
+    ts.realizeDiagnostics = realizeDiagnostics;
+    function realizeDiagnostic(diagnostic, newLine) {
+        return {
+            message: ts.flattenDiagnosticMessageText(diagnostic.messageText, newLine),
+            start: diagnostic.start,
+            length: diagnostic.length,
+            category: ts.DiagnosticCategory[diagnostic.category].toLowerCase(),
+            code: diagnostic.code
+        };
+    }
+    var LanguageServiceShimObject = (function (_super) {
+        __extends(LanguageServiceShimObject, _super);
+        function LanguageServiceShimObject(factory, host, languageService) {
+            _super.call(this, factory);
+            this.host = host;
+            this.languageService = languageService;
+            this.logPerformance = false;
+            this.logger = this.host;
+        }
+        LanguageServiceShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
+            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
+        };
+        LanguageServiceShimObject.prototype.dispose = function (dummy) {
+            this.logger.log("dispose()");
+            this.languageService.dispose();
+            this.languageService = null;
+            if (debugObjectHost && debugObjectHost.CollectGarbage) {
+                debugObjectHost.CollectGarbage();
+                this.logger.log("CollectGarbage()");
+            }
+            this.logger = null;
+            _super.prototype.dispose.call(this, dummy);
+        };
+        LanguageServiceShimObject.prototype.refresh = function (throwOnError) {
+            this.forwardJSONCall("refresh(" + throwOnError + ")", function () { return null; });
+        };
+        LanguageServiceShimObject.prototype.cleanupSemanticCache = function () {
+            var _this = this;
+            this.forwardJSONCall("cleanupSemanticCache()", function () {
+                _this.languageService.cleanupSemanticCache();
+                return null;
+            });
+        };
+        LanguageServiceShimObject.prototype.realizeDiagnostics = function (diagnostics) {
+            var newLine = ts.getNewLineOrDefaultFromHost(this.host);
+            return ts.realizeDiagnostics(diagnostics, newLine);
+        };
+        LanguageServiceShimObject.prototype.getSyntacticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSyntacticClassifications(fileName, ts.createTextSpan(start, length)); });
+        };
+        LanguageServiceShimObject.prototype.getSemanticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSemanticClassifications(fileName, ts.createTextSpan(start, length)); });
+        };
+        LanguageServiceShimObject.prototype.getEncodedSyntacticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getEncodedSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return convertClassifications(_this.languageService.getEncodedSyntacticClassifications(fileName, ts.createTextSpan(start, length))); });
+        };
+        LanguageServiceShimObject.prototype.getEncodedSemanticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getEncodedSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return convertClassifications(_this.languageService.getEncodedSemanticClassifications(fileName, ts.createTextSpan(start, length))); });
+        };
+        LanguageServiceShimObject.prototype.getSyntacticDiagnostics = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getSyntacticDiagnostics('" + fileName + "')", function () {
+                var diagnostics = _this.languageService.getSyntacticDiagnostics(fileName);
+                return _this.realizeDiagnostics(diagnostics);
+            });
+        };
+        LanguageServiceShimObject.prototype.getSemanticDiagnostics = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getSemanticDiagnostics('" + fileName + "')", function () {
+                var diagnostics = _this.languageService.getSemanticDiagnostics(fileName);
+                return _this.realizeDiagnostics(diagnostics);
+            });
+        };
+        LanguageServiceShimObject.prototype.getCompilerOptionsDiagnostics = function () {
+            var _this = this;
+            return this.forwardJSONCall("getCompilerOptionsDiagnostics()", function () {
+                var diagnostics = _this.languageService.getCompilerOptionsDiagnostics();
+                return _this.realizeDiagnostics(diagnostics);
+            });
+        };
+        LanguageServiceShimObject.prototype.getQuickInfoAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getQuickInfoAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getQuickInfoAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getNameOrDottedNameSpan = function (fileName, startPos, endPos) {
+            var _this = this;
+            return this.forwardJSONCall("getNameOrDottedNameSpan('" + fileName + "', " + startPos + ", " + endPos + ")", function () { return _this.languageService.getNameOrDottedNameSpan(fileName, startPos, endPos); });
+        };
+        LanguageServiceShimObject.prototype.getBreakpointStatementAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getBreakpointStatementAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBreakpointStatementAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getSignatureHelpItems = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getSignatureHelpItems('" + fileName + "', " + position + ")", function () { return _this.languageService.getSignatureHelpItems(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getDefinitionAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDefinitionAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getTypeDefinitionAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getTypeDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getTypeDefinitionAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getRenameInfo = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getRenameInfo('" + fileName + "', " + position + ")", function () { return _this.languageService.getRenameInfo(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.findRenameLocations = function (fileName, position, findInStrings, findInComments) {
+            var _this = this;
+            return this.forwardJSONCall("findRenameLocations('" + fileName + "', " + position + ", " + findInStrings + ", " + findInComments + ")", function () { return _this.languageService.findRenameLocations(fileName, position, findInStrings, findInComments); });
+        };
+        LanguageServiceShimObject.prototype.getBraceMatchingAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getBraceMatchingAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBraceMatchingAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.isValidBraceCompletionAtPostion = function (fileName, position, openingBrace) {
+            var _this = this;
+            return this.forwardJSONCall("isValidBraceCompletionAtPostion('" + fileName + "', " + position + ", " + openingBrace + ")", function () { return _this.languageService.isValidBraceCompletionAtPostion(fileName, position, openingBrace); });
+        };
+        LanguageServiceShimObject.prototype.getIndentationAtPosition = function (fileName, position, options) {
+            var _this = this;
+            return this.forwardJSONCall("getIndentationAtPosition('" + fileName + "', " + position + ")", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getIndentationAtPosition(fileName, position, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getReferencesAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getReferencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getReferencesAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.findReferences = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("findReferences('" + fileName + "', " + position + ")", function () { return _this.languageService.findReferences(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getOccurrencesAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getOccurrencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getOccurrencesAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getDocumentHighlights = function (fileName, position, filesToSearch) {
+            var _this = this;
+            return this.forwardJSONCall("getDocumentHighlights('" + fileName + "', " + position + ")", function () {
+                var results = _this.languageService.getDocumentHighlights(fileName, position, JSON.parse(filesToSearch));
+                var normalizedName = ts.normalizeSlashes(fileName).toLowerCase();
+                return ts.filter(results, function (r) { return ts.normalizeSlashes(r.fileName).toLowerCase() === normalizedName; });
+            });
+        };
+        LanguageServiceShimObject.prototype.getCompletionsAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getCompletionsAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getCompletionsAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getCompletionEntryDetails = function (fileName, position, entryName) {
+            var _this = this;
+            return this.forwardJSONCall("getCompletionEntryDetails('" + fileName + "', " + position + ", '" + entryName + "')", function () { return _this.languageService.getCompletionEntryDetails(fileName, position, entryName); });
+        };
+        LanguageServiceShimObject.prototype.getFormattingEditsForRange = function (fileName, start, end, options) {
+            var _this = this;
+            return this.forwardJSONCall("getFormattingEditsForRange('" + fileName + "', " + start + ", " + end + ")", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getFormattingEditsForRange(fileName, start, end, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getFormattingEditsForDocument = function (fileName, options) {
+            var _this = this;
+            return this.forwardJSONCall("getFormattingEditsForDocument('" + fileName + "')", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getFormattingEditsForDocument(fileName, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getFormattingEditsAfterKeystroke = function (fileName, position, key, options) {
+            var _this = this;
+            return this.forwardJSONCall("getFormattingEditsAfterKeystroke('" + fileName + "', " + position + ", '" + key + "')", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getFormattingEditsAfterKeystroke(fileName, position, key, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getDocCommentTemplateAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getDocCommentTemplateAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDocCommentTemplateAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getNavigateToItems = function (searchValue, maxResultCount) {
+            var _this = this;
+            return this.forwardJSONCall("getNavigateToItems('" + searchValue + "', " + maxResultCount + ")", function () { return _this.languageService.getNavigateToItems(searchValue, maxResultCount); });
+        };
+        LanguageServiceShimObject.prototype.getNavigationBarItems = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getNavigationBarItems('" + fileName + "')", function () { return _this.languageService.getNavigationBarItems(fileName); });
+        };
+        LanguageServiceShimObject.prototype.getOutliningSpans = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getOutliningSpans('" + fileName + "')", function () { return _this.languageService.getOutliningSpans(fileName); });
+        };
+        LanguageServiceShimObject.prototype.getTodoComments = function (fileName, descriptors) {
+            var _this = this;
+            return this.forwardJSONCall("getTodoComments('" + fileName + "')", function () { return _this.languageService.getTodoComments(fileName, JSON.parse(descriptors)); });
+        };
+        LanguageServiceShimObject.prototype.getEmitOutput = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getEmitOutput('" + fileName + "')", function () { return _this.languageService.getEmitOutput(fileName); });
+        };
+        return LanguageServiceShimObject;
+    }(ShimBase));
+    function convertClassifications(classifications) {
+        return { spans: classifications.spans.join(","), endOfLineState: classifications.endOfLineState };
+    }
+    var ClassifierShimObject = (function (_super) {
+        __extends(ClassifierShimObject, _super);
+        function ClassifierShimObject(factory, logger) {
+            _super.call(this, factory);
+            this.logger = logger;
+            this.logPerformance = false;
+            this.classifier = ts.createClassifier();
+        }
+        ClassifierShimObject.prototype.getEncodedLexicalClassifications = function (text, lexState, syntacticClassifierAbsent) {
+            var _this = this;
+            return forwardJSONCall(this.logger, "getEncodedLexicalClassifications", function () { return convertClassifications(_this.classifier.getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent)); }, this.logPerformance);
+        };
+        ClassifierShimObject.prototype.getClassificationsForLine = function (text, lexState, classifyKeywordsInGenerics) {
+            var classification = this.classifier.getClassificationsForLine(text, lexState, classifyKeywordsInGenerics);
+            var result = "";
+            for (var _i = 0, _a = classification.entries; _i < _a.length; _i++) {
+                var item = _a[_i];
+                result += item.length + "\n";
+                result += item.classification + "\n";
+            }
+            result += classification.finalLexState;
+            return result;
+        };
+        return ClassifierShimObject;
+    }(ShimBase));
+    var CoreServicesShimObject = (function (_super) {
+        __extends(CoreServicesShimObject, _super);
+        function CoreServicesShimObject(factory, logger, host) {
+            _super.call(this, factory);
+            this.logger = logger;
+            this.host = host;
+            this.logPerformance = false;
+        }
+        CoreServicesShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
+            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
+        };
+        CoreServicesShimObject.prototype.resolveModuleName = function (fileName, moduleName, compilerOptionsJson) {
+            var _this = this;
+            return this.forwardJSONCall("resolveModuleName('" + fileName + "')", function () {
+                var compilerOptions = JSON.parse(compilerOptionsJson);
+                var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
+                return {
+                    resolvedFileName: result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined,
+                    failedLookupLocations: result.failedLookupLocations
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.resolveTypeReferenceDirective = function (fileName, typeReferenceDirective, compilerOptionsJson) {
+            var _this = this;
+            return this.forwardJSONCall("resolveTypeReferenceDirective(" + fileName + ")", function () {
+                var compilerOptions = JSON.parse(compilerOptionsJson);
+                var result = ts.resolveTypeReferenceDirective(typeReferenceDirective, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
+                return {
+                    resolvedFileName: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.resolvedFileName : undefined,
+                    primary: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.primary : true,
+                    failedLookupLocations: result.failedLookupLocations
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.getPreProcessedFileInfo = function (fileName, sourceTextSnapshot) {
+            var _this = this;
+            return this.forwardJSONCall("getPreProcessedFileInfo('" + fileName + "')", function () {
+                var result = ts.preProcessFile(sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength()), true, true);
+                return {
+                    referencedFiles: _this.convertFileReferences(result.referencedFiles),
+                    importedFiles: _this.convertFileReferences(result.importedFiles),
+                    ambientExternalModules: result.ambientExternalModules,
+                    isLibFile: result.isLibFile,
+                    typeReferenceDirectives: _this.convertFileReferences(result.typeReferenceDirectives)
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.convertFileReferences = function (refs) {
+            if (!refs) {
+                return undefined;
+            }
+            var result = [];
+            for (var _i = 0, refs_2 = refs; _i < refs_2.length; _i++) {
+                var ref = refs_2[_i];
+                result.push({
+                    path: ts.normalizeSlashes(ref.fileName),
+                    position: ref.pos,
+                    length: ref.end - ref.pos
+                });
+            }
+            return result;
+        };
+        CoreServicesShimObject.prototype.getTSConfigFileInfo = function (fileName, sourceTextSnapshot) {
+            var _this = this;
+            return this.forwardJSONCall("getTSConfigFileInfo('" + fileName + "')", function () {
+                var text = sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength());
+                var result = ts.parseConfigFileTextToJson(fileName, text);
+                if (result.error) {
+                    return {
+                        options: {},
+                        typingOptions: {},
+                        files: [],
+                        raw: {},
+                        errors: [realizeDiagnostic(result.error, "\r\n")]
+                    };
+                }
+                var normalizedFileName = ts.normalizeSlashes(fileName);
+                var configFile = ts.parseJsonConfigFileContent(result.config, _this.host, ts.getDirectoryPath(normalizedFileName), {}, normalizedFileName);
+                return {
+                    options: configFile.options,
+                    typingOptions: configFile.typingOptions,
+                    files: configFile.fileNames,
+                    raw: configFile.raw,
+                    errors: realizeDiagnostics(configFile.errors, "\r\n")
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.getDefaultCompilationSettings = function () {
+            return this.forwardJSONCall("getDefaultCompilationSettings()", function () { return ts.getDefaultCompilerOptions(); });
+        };
+        CoreServicesShimObject.prototype.discoverTypings = function (discoverTypingsJson) {
+            var _this = this;
+            var getCanonicalFileName = ts.createGetCanonicalFileName(false);
+            return this.forwardJSONCall("discoverTypings()", function () {
+                var info = JSON.parse(discoverTypingsJson);
+                return ts.JsTyping.discoverTypings(_this.host, info.fileNames, ts.toPath(info.projectRootPath, info.projectRootPath, getCanonicalFileName), ts.toPath(info.safeListPath, info.safeListPath, getCanonicalFileName), info.packageNameToTypingLocation, info.typingOptions, info.compilerOptions);
+            });
+        };
+        return CoreServicesShimObject;
+    }(ShimBase));
+    var TypeScriptServicesFactory = (function () {
+        function TypeScriptServicesFactory() {
+            this._shims = [];
+        }
+        TypeScriptServicesFactory.prototype.getServicesVersion = function () {
+            return ts.servicesVersion;
+        };
+        TypeScriptServicesFactory.prototype.createLanguageServiceShim = function (host) {
+            try {
+                if (this.documentRegistry === undefined) {
+                    this.documentRegistry = ts.createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory());
+                }
+                var hostAdapter = new LanguageServiceShimHostAdapter(host);
+                var languageService = ts.createLanguageService(hostAdapter, this.documentRegistry);
+                return new LanguageServiceShimObject(this, host, languageService);
+            }
+            catch (err) {
+                logInternalError(host, err);
+                throw err;
+            }
+        };
+        TypeScriptServicesFactory.prototype.createClassifierShim = function (logger) {
+            try {
+                return new ClassifierShimObject(this, logger);
+            }
+            catch (err) {
+                logInternalError(logger, err);
+                throw err;
+            }
+        };
+        TypeScriptServicesFactory.prototype.createCoreServicesShim = function (host) {
+            try {
+                var adapter = new CoreServicesShimHostAdapter(host);
+                return new CoreServicesShimObject(this, host, adapter);
+            }
+            catch (err) {
+                logInternalError(host, err);
+                throw err;
+            }
+        };
+        TypeScriptServicesFactory.prototype.close = function () {
+            this._shims = [];
+            this.documentRegistry = undefined;
+        };
+        TypeScriptServicesFactory.prototype.registerShim = function (shim) {
+            this._shims.push(shim);
+        };
+        TypeScriptServicesFactory.prototype.unregisterShim = function (shim) {
+            for (var i = 0, n = this._shims.length; i < n; i++) {
+                if (this._shims[i] === shim) {
+                    delete this._shims[i];
+                    return;
+                }
+            }
+            throw new Error("Invalid operation");
+        };
+        return TypeScriptServicesFactory;
+    }());
+    ts.TypeScriptServicesFactory = TypeScriptServicesFactory;
+    if (typeof module !== "undefined" && module.exports) {
+        module.exports = ts;
+    }
+})(ts || (ts = {}));
+var TypeScript;
+(function (TypeScript) {
+    var Services;
+    (function (Services) {
+        Services.TypeScriptServicesFactory = ts.TypeScriptServicesFactory;
+    })(Services = TypeScript.Services || (TypeScript.Services = {}));
+})(TypeScript || (TypeScript = {}));
+var toolsVersion = "1.9";
diff --git a/lib/typescript.d.ts b/lib/typescript.d.ts
index 1ac624055d7..533903795cf 100644
--- a/lib/typescript.d.ts
+++ b/lib/typescript.d.ts
@@ -13,2493 +13,2513 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
-declare namespace ts {
-    interface Map<T> {
-        [index: string]: T;
-    }
-    type Path = string & {
-        __pathBrand: any;
-    };
-    interface FileMap<T> {
-        get(fileName: Path): T;
-        set(fileName: Path, value: T): void;
-        contains(fileName: Path): boolean;
-        remove(fileName: Path): void;
-        forEachValue(f: (key: Path, v: T) => void): void;
-        clear(): void;
-    }
-    interface TextRange {
-        pos: number;
-        end: number;
-    }
-    enum SyntaxKind {
-        Unknown = 0,
-        EndOfFileToken = 1,
-        SingleLineCommentTrivia = 2,
-        MultiLineCommentTrivia = 3,
-        NewLineTrivia = 4,
-        WhitespaceTrivia = 5,
-        ShebangTrivia = 6,
-        ConflictMarkerTrivia = 7,
-        NumericLiteral = 8,
-        StringLiteral = 9,
-        RegularExpressionLiteral = 10,
-        NoSubstitutionTemplateLiteral = 11,
-        TemplateHead = 12,
-        TemplateMiddle = 13,
-        TemplateTail = 14,
-        OpenBraceToken = 15,
-        CloseBraceToken = 16,
-        OpenParenToken = 17,
-        CloseParenToken = 18,
-        OpenBracketToken = 19,
-        CloseBracketToken = 20,
-        DotToken = 21,
-        DotDotDotToken = 22,
-        SemicolonToken = 23,
-        CommaToken = 24,
-        LessThanToken = 25,
-        LessThanSlashToken = 26,
-        GreaterThanToken = 27,
-        LessThanEqualsToken = 28,
-        GreaterThanEqualsToken = 29,
-        EqualsEqualsToken = 30,
-        ExclamationEqualsToken = 31,
-        EqualsEqualsEqualsToken = 32,
-        ExclamationEqualsEqualsToken = 33,
-        EqualsGreaterThanToken = 34,
-        PlusToken = 35,
-        MinusToken = 36,
-        AsteriskToken = 37,
-        AsteriskAsteriskToken = 38,
-        SlashToken = 39,
-        PercentToken = 40,
-        PlusPlusToken = 41,
-        MinusMinusToken = 42,
-        LessThanLessThanToken = 43,
-        GreaterThanGreaterThanToken = 44,
-        GreaterThanGreaterThanGreaterThanToken = 45,
-        AmpersandToken = 46,
-        BarToken = 47,
-        CaretToken = 48,
-        ExclamationToken = 49,
-        TildeToken = 50,
-        AmpersandAmpersandToken = 51,
-        BarBarToken = 52,
-        QuestionToken = 53,
-        ColonToken = 54,
-        AtToken = 55,
-        EqualsToken = 56,
-        PlusEqualsToken = 57,
-        MinusEqualsToken = 58,
-        AsteriskEqualsToken = 59,
-        AsteriskAsteriskEqualsToken = 60,
-        SlashEqualsToken = 61,
-        PercentEqualsToken = 62,
-        LessThanLessThanEqualsToken = 63,
-        GreaterThanGreaterThanEqualsToken = 64,
-        GreaterThanGreaterThanGreaterThanEqualsToken = 65,
-        AmpersandEqualsToken = 66,
-        BarEqualsToken = 67,
-        CaretEqualsToken = 68,
-        Identifier = 69,
-        BreakKeyword = 70,
-        CaseKeyword = 71,
-        CatchKeyword = 72,
-        ClassKeyword = 73,
-        ConstKeyword = 74,
-        ContinueKeyword = 75,
-        DebuggerKeyword = 76,
-        DefaultKeyword = 77,
-        DeleteKeyword = 78,
-        DoKeyword = 79,
-        ElseKeyword = 80,
-        EnumKeyword = 81,
-        ExportKeyword = 82,
-        ExtendsKeyword = 83,
-        FalseKeyword = 84,
-        FinallyKeyword = 85,
-        ForKeyword = 86,
-        FunctionKeyword = 87,
-        IfKeyword = 88,
-        ImportKeyword = 89,
-        InKeyword = 90,
-        InstanceOfKeyword = 91,
-        NewKeyword = 92,
-        NullKeyword = 93,
-        ReturnKeyword = 94,
-        SuperKeyword = 95,
-        SwitchKeyword = 96,
-        ThisKeyword = 97,
-        ThrowKeyword = 98,
-        TrueKeyword = 99,
-        TryKeyword = 100,
-        TypeOfKeyword = 101,
-        VarKeyword = 102,
-        VoidKeyword = 103,
-        WhileKeyword = 104,
-        WithKeyword = 105,
-        ImplementsKeyword = 106,
-        InterfaceKeyword = 107,
-        LetKeyword = 108,
-        PackageKeyword = 109,
-        PrivateKeyword = 110,
-        ProtectedKeyword = 111,
-        PublicKeyword = 112,
-        StaticKeyword = 113,
-        YieldKeyword = 114,
-        AbstractKeyword = 115,
-        AsKeyword = 116,
-        AnyKeyword = 117,
-        AsyncKeyword = 118,
-        AwaitKeyword = 119,
-        BooleanKeyword = 120,
-        ConstructorKeyword = 121,
-        DeclareKeyword = 122,
-        GetKeyword = 123,
-        IsKeyword = 124,
-        ModuleKeyword = 125,
-        NamespaceKeyword = 126,
-        NeverKeyword = 127,
-        ReadonlyKeyword = 128,
-        RequireKeyword = 129,
-        NumberKeyword = 130,
-        SetKeyword = 131,
-        StringKeyword = 132,
-        SymbolKeyword = 133,
-        TypeKeyword = 134,
-        UndefinedKeyword = 135,
-        FromKeyword = 136,
-        GlobalKeyword = 137,
-        OfKeyword = 138,
-        QualifiedName = 139,
-        ComputedPropertyName = 140,
-        TypeParameter = 141,
-        Parameter = 142,
-        Decorator = 143,
-        PropertySignature = 144,
-        PropertyDeclaration = 145,
-        MethodSignature = 146,
-        MethodDeclaration = 147,
-        Constructor = 148,
-        GetAccessor = 149,
-        SetAccessor = 150,
-        CallSignature = 151,
-        ConstructSignature = 152,
-        IndexSignature = 153,
-        TypePredicate = 154,
-        TypeReference = 155,
-        FunctionType = 156,
-        ConstructorType = 157,
-        TypeQuery = 158,
-        TypeLiteral = 159,
-        ArrayType = 160,
-        TupleType = 161,
-        UnionType = 162,
-        IntersectionType = 163,
-        ParenthesizedType = 164,
-        ThisType = 165,
-        StringLiteralType = 166,
-        ObjectBindingPattern = 167,
-        ArrayBindingPattern = 168,
-        BindingElement = 169,
-        ArrayLiteralExpression = 170,
-        ObjectLiteralExpression = 171,
-        PropertyAccessExpression = 172,
-        ElementAccessExpression = 173,
-        CallExpression = 174,
-        NewExpression = 175,
-        TaggedTemplateExpression = 176,
-        TypeAssertionExpression = 177,
-        ParenthesizedExpression = 178,
-        FunctionExpression = 179,
-        ArrowFunction = 180,
-        DeleteExpression = 181,
-        TypeOfExpression = 182,
-        VoidExpression = 183,
-        AwaitExpression = 184,
-        PrefixUnaryExpression = 185,
-        PostfixUnaryExpression = 186,
-        BinaryExpression = 187,
-        ConditionalExpression = 188,
-        TemplateExpression = 189,
-        YieldExpression = 190,
-        SpreadElementExpression = 191,
-        ClassExpression = 192,
-        OmittedExpression = 193,
-        ExpressionWithTypeArguments = 194,
-        AsExpression = 195,
-        NonNullExpression = 196,
-        TemplateSpan = 197,
-        SemicolonClassElement = 198,
-        Block = 199,
-        VariableStatement = 200,
-        EmptyStatement = 201,
-        ExpressionStatement = 202,
-        IfStatement = 203,
-        DoStatement = 204,
-        WhileStatement = 205,
-        ForStatement = 206,
-        ForInStatement = 207,
-        ForOfStatement = 208,
-        ContinueStatement = 209,
-        BreakStatement = 210,
-        ReturnStatement = 211,
-        WithStatement = 212,
-        SwitchStatement = 213,
-        LabeledStatement = 214,
-        ThrowStatement = 215,
-        TryStatement = 216,
-        DebuggerStatement = 217,
-        VariableDeclaration = 218,
-        VariableDeclarationList = 219,
-        FunctionDeclaration = 220,
-        ClassDeclaration = 221,
-        InterfaceDeclaration = 222,
-        TypeAliasDeclaration = 223,
-        EnumDeclaration = 224,
-        ModuleDeclaration = 225,
-        ModuleBlock = 226,
-        CaseBlock = 227,
-        NamespaceExportDeclaration = 228,
-        ImportEqualsDeclaration = 229,
-        ImportDeclaration = 230,
-        ImportClause = 231,
-        NamespaceImport = 232,
-        NamedImports = 233,
-        ImportSpecifier = 234,
-        ExportAssignment = 235,
-        ExportDeclaration = 236,
-        NamedExports = 237,
-        ExportSpecifier = 238,
-        MissingDeclaration = 239,
-        ExternalModuleReference = 240,
-        JsxElement = 241,
-        JsxSelfClosingElement = 242,
-        JsxOpeningElement = 243,
-        JsxText = 244,
-        JsxClosingElement = 245,
-        JsxAttribute = 246,
-        JsxSpreadAttribute = 247,
-        JsxExpression = 248,
-        CaseClause = 249,
-        DefaultClause = 250,
-        HeritageClause = 251,
-        CatchClause = 252,
-        PropertyAssignment = 253,
-        ShorthandPropertyAssignment = 254,
-        EnumMember = 255,
-        SourceFile = 256,
-        JSDocTypeExpression = 257,
-        JSDocAllType = 258,
-        JSDocUnknownType = 259,
-        JSDocArrayType = 260,
-        JSDocUnionType = 261,
-        JSDocTupleType = 262,
-        JSDocNullableType = 263,
-        JSDocNonNullableType = 264,
-        JSDocRecordType = 265,
-        JSDocRecordMember = 266,
-        JSDocTypeReference = 267,
-        JSDocOptionalType = 268,
-        JSDocFunctionType = 269,
-        JSDocVariadicType = 270,
-        JSDocConstructorType = 271,
-        JSDocThisType = 272,
-        JSDocComment = 273,
-        JSDocTag = 274,
-        JSDocParameterTag = 275,
-        JSDocReturnTag = 276,
-        JSDocTypeTag = 277,
-        JSDocTemplateTag = 278,
-        SyntaxList = 279,
-        Count = 280,
-        FirstAssignment = 56,
-        LastAssignment = 68,
-        FirstReservedWord = 70,
-        LastReservedWord = 105,
-        FirstKeyword = 70,
-        LastKeyword = 138,
-        FirstFutureReservedWord = 106,
-        LastFutureReservedWord = 114,
-        FirstTypeNode = 154,
-        LastTypeNode = 166,
-        FirstPunctuation = 15,
-        LastPunctuation = 68,
-        FirstToken = 0,
-        LastToken = 138,
-        FirstTriviaToken = 2,
-        LastTriviaToken = 7,
-        FirstLiteralToken = 8,
-        LastLiteralToken = 11,
-        FirstTemplateToken = 11,
-        LastTemplateToken = 14,
-        FirstBinaryOperator = 25,
-        LastBinaryOperator = 68,
-        FirstNode = 139,
-    }
-    enum NodeFlags {
-        None = 0,
-        Export = 1,
-        Ambient = 2,
-        Public = 4,
-        Private = 8,
-        Protected = 16,
-        Static = 32,
-        Readonly = 64,
-        Abstract = 128,
-        Async = 256,
-        Default = 512,
-        Let = 1024,
-        Const = 2048,
-        Namespace = 4096,
-        ExportContext = 8192,
-        ContainsThis = 16384,
-        HasImplicitReturn = 32768,
-        HasExplicitReturn = 65536,
-        GlobalAugmentation = 131072,
-        HasClassExtends = 262144,
-        HasDecorators = 524288,
-        HasParamDecorators = 1048576,
-        HasAsyncFunctions = 2097152,
-        DisallowInContext = 4194304,
-        YieldContext = 8388608,
-        DecoratorContext = 16777216,
-        AwaitContext = 33554432,
-        ThisNodeHasError = 67108864,
-        JavaScriptFile = 134217728,
-        ThisNodeOrAnySubNodesHasError = 268435456,
-        HasAggregatedChildData = 536870912,
-        HasJsxSpreadAttribute = 1073741824,
-        Modifier = 1023,
-        AccessibilityModifier = 28,
-        ParameterPropertyModifier = 92,
-        BlockScoped = 3072,
-        ReachabilityCheckFlags = 98304,
-        EmitHelperFlags = 3932160,
-        ContextFlags = 197132288,
-        TypeExcludesFlags = 41943040,
-    }
-    enum JsxFlags {
-        None = 0,
-        /** An element from a named property of the JSX.IntrinsicElements interface */
-        IntrinsicNamedElement = 1,
-        /** An element inferred from the string index signature of the JSX.IntrinsicElements interface */
-        IntrinsicIndexedElement = 2,
-        IntrinsicElement = 3,
-    }
-    interface Node extends TextRange {
-        kind: SyntaxKind;
-        flags: NodeFlags;
-        decorators?: NodeArray<Decorator>;
-        modifiers?: ModifiersArray;
-        parent?: Node;
-    }
-    interface NodeArray<T> extends Array<T>, TextRange {
-        hasTrailingComma?: boolean;
-    }
-    interface ModifiersArray extends NodeArray<Modifier> {
-        flags: number;
-    }
-    interface Modifier extends Node {
-    }
-    interface Identifier extends PrimaryExpression {
-        text: string;
-        originalKeywordKind?: SyntaxKind;
-    }
-    interface QualifiedName extends Node {
-        left: EntityName;
-        right: Identifier;
-    }
-    type EntityName = Identifier | QualifiedName;
-    type PropertyName = Identifier | LiteralExpression | ComputedPropertyName;
-    type DeclarationName = Identifier | LiteralExpression | ComputedPropertyName | BindingPattern;
-    interface Declaration extends Node {
-        _declarationBrand: any;
-        name?: DeclarationName;
-    }
-    interface DeclarationStatement extends Declaration, Statement {
-        name?: Identifier;
-    }
-    interface ComputedPropertyName extends Node {
-        expression: Expression;
-    }
-    interface Decorator extends Node {
-        expression: LeftHandSideExpression;
-    }
-    interface TypeParameterDeclaration extends Declaration {
-        name: Identifier;
-        constraint?: TypeNode;
-        expression?: Expression;
-    }
-    interface SignatureDeclaration extends Declaration {
-        name?: PropertyName;
-        typeParameters?: NodeArray<TypeParameterDeclaration>;
-        parameters: NodeArray<ParameterDeclaration>;
-        type?: TypeNode;
-    }
-    interface CallSignatureDeclaration extends SignatureDeclaration, TypeElement {
-    }
-    interface ConstructSignatureDeclaration extends SignatureDeclaration, TypeElement {
-    }
-    interface VariableDeclaration extends Declaration {
-        parent?: VariableDeclarationList;
-        name: Identifier | BindingPattern;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface VariableDeclarationList extends Node {
-        declarations: NodeArray<VariableDeclaration>;
-    }
-    interface ParameterDeclaration extends Declaration {
-        dotDotDotToken?: Node;
-        name: Identifier | BindingPattern;
-        questionToken?: Node;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface BindingElement extends Declaration {
-        propertyName?: PropertyName;
-        dotDotDotToken?: Node;
-        name: Identifier | BindingPattern;
-        initializer?: Expression;
-    }
-    interface PropertySignature extends TypeElement {
-        name: PropertyName;
-        questionToken?: Node;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface PropertyDeclaration extends ClassElement {
-        questionToken?: Node;
-        name: PropertyName;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface ObjectLiteralElement extends Declaration {
-        _objectLiteralBrandBrand: any;
-        name?: PropertyName;
-    }
-    interface PropertyAssignment extends ObjectLiteralElement {
-        _propertyAssignmentBrand: any;
-        name: PropertyName;
-        questionToken?: Node;
-        initializer: Expression;
-    }
-    interface ShorthandPropertyAssignment extends ObjectLiteralElement {
-        name: Identifier;
-        questionToken?: Node;
-        equalsToken?: Node;
-        objectAssignmentInitializer?: Expression;
-    }
-    interface VariableLikeDeclaration extends Declaration {
-        propertyName?: PropertyName;
-        dotDotDotToken?: Node;
-        name: DeclarationName;
-        questionToken?: Node;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface PropertyLikeDeclaration extends Declaration {
-        name: PropertyName;
-    }
-    interface BindingPattern extends Node {
-        elements: NodeArray<BindingElement>;
-    }
-    interface ObjectBindingPattern extends BindingPattern {
-    }
-    interface ArrayBindingPattern extends BindingPattern {
-    }
-    /**
-     * Several node kinds share function-like features such as a signature,
-     * a name, and a body. These nodes should extend FunctionLikeDeclaration.
-     * Examples:
-     * - FunctionDeclaration
-     * - MethodDeclaration
-     * - AccessorDeclaration
-     */
-    interface FunctionLikeDeclaration extends SignatureDeclaration {
-        _functionLikeDeclarationBrand: any;
-        asteriskToken?: Node;
-        questionToken?: Node;
-        body?: Block | Expression;
-    }
-    interface FunctionDeclaration extends FunctionLikeDeclaration, DeclarationStatement {
-        name?: Identifier;
-        body?: FunctionBody;
-    }
-    interface MethodSignature extends SignatureDeclaration, TypeElement {
-        name: PropertyName;
-    }
-    interface MethodDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
-        name: PropertyName;
-        body?: FunctionBody;
-    }
-    interface ConstructorDeclaration extends FunctionLikeDeclaration, ClassElement {
-        body?: FunctionBody;
-    }
-    interface SemicolonClassElement extends ClassElement {
-        _semicolonClassElementBrand: any;
-    }
-    interface AccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
-        _accessorDeclarationBrand: any;
-        name: PropertyName;
-        body: FunctionBody;
-    }
-    interface GetAccessorDeclaration extends AccessorDeclaration {
-    }
-    interface SetAccessorDeclaration extends AccessorDeclaration {
-    }
-    interface IndexSignatureDeclaration extends SignatureDeclaration, ClassElement, TypeElement {
-        _indexSignatureDeclarationBrand: any;
-    }
-    interface TypeNode extends Node {
-        _typeNodeBrand: any;
-    }
-    interface ThisTypeNode extends TypeNode {
-        _thisTypeNodeBrand: any;
-    }
-    interface FunctionOrConstructorTypeNode extends TypeNode, SignatureDeclaration {
-        _functionOrConstructorTypeNodeBrand: any;
-    }
-    interface FunctionTypeNode extends FunctionOrConstructorTypeNode {
-    }
-    interface ConstructorTypeNode extends FunctionOrConstructorTypeNode {
-    }
-    interface TypeReferenceNode extends TypeNode {
-        typeName: EntityName;
-        typeArguments?: NodeArray<TypeNode>;
-    }
-    interface TypePredicateNode extends TypeNode {
-        parameterName: Identifier | ThisTypeNode;
-        type: TypeNode;
-    }
-    interface TypeQueryNode extends TypeNode {
-        exprName: EntityName;
-    }
-    interface TypeLiteralNode extends TypeNode, Declaration {
-        members: NodeArray<TypeElement>;
-    }
-    interface ArrayTypeNode extends TypeNode {
-        elementType: TypeNode;
-    }
-    interface TupleTypeNode extends TypeNode {
-        elementTypes: NodeArray<TypeNode>;
-    }
-    interface UnionOrIntersectionTypeNode extends TypeNode {
-        types: NodeArray<TypeNode>;
-    }
-    interface UnionTypeNode extends UnionOrIntersectionTypeNode {
-    }
-    interface IntersectionTypeNode extends UnionOrIntersectionTypeNode {
-    }
-    interface ParenthesizedTypeNode extends TypeNode {
-        type: TypeNode;
-    }
-    interface StringLiteralTypeNode extends LiteralLikeNode, TypeNode {
-        _stringLiteralTypeBrand: any;
-    }
-    interface StringLiteral extends LiteralExpression {
-        _stringLiteralBrand: any;
-    }
-    interface Expression extends Node {
-        _expressionBrand: any;
-        contextualType?: Type;
-    }
-    interface OmittedExpression extends Expression {
-    }
-    interface UnaryExpression extends Expression {
-        _unaryExpressionBrand: any;
-    }
-    interface IncrementExpression extends UnaryExpression {
-        _incrementExpressionBrand: any;
-    }
-    interface PrefixUnaryExpression extends IncrementExpression {
-        operator: SyntaxKind;
-        operand: UnaryExpression;
-    }
-    interface PostfixUnaryExpression extends IncrementExpression {
-        operand: LeftHandSideExpression;
-        operator: SyntaxKind;
-    }
-    interface PostfixExpression extends UnaryExpression {
-        _postfixExpressionBrand: any;
-    }
-    interface LeftHandSideExpression extends IncrementExpression {
-        _leftHandSideExpressionBrand: any;
-    }
-    interface MemberExpression extends LeftHandSideExpression {
-        _memberExpressionBrand: any;
-    }
-    interface PrimaryExpression extends MemberExpression {
-        _primaryExpressionBrand: any;
-    }
-    interface DeleteExpression extends UnaryExpression {
-        expression: UnaryExpression;
-    }
-    interface TypeOfExpression extends UnaryExpression {
-        expression: UnaryExpression;
-    }
-    interface VoidExpression extends UnaryExpression {
-        expression: UnaryExpression;
-    }
-    interface AwaitExpression extends UnaryExpression {
-        expression: UnaryExpression;
-    }
-    interface YieldExpression extends Expression {
-        asteriskToken?: Node;
-        expression?: Expression;
-    }
-    interface BinaryExpression extends Expression, Declaration {
-        left: Expression;
-        operatorToken: Node;
-        right: Expression;
-    }
-    interface ConditionalExpression extends Expression {
-        condition: Expression;
-        questionToken: Node;
-        whenTrue: Expression;
-        colonToken: Node;
-        whenFalse: Expression;
-    }
-    type FunctionBody = Block;
-    type ConciseBody = FunctionBody | Expression;
-    interface FunctionExpression extends PrimaryExpression, FunctionLikeDeclaration {
-        name?: Identifier;
-        body: FunctionBody;
-    }
-    interface ArrowFunction extends Expression, FunctionLikeDeclaration {
-        equalsGreaterThanToken: Node;
-        body: ConciseBody;
-    }
-    interface LiteralLikeNode extends Node {
-        text: string;
-        isUnterminated?: boolean;
-        hasExtendedUnicodeEscape?: boolean;
-    }
-    interface LiteralExpression extends LiteralLikeNode, PrimaryExpression {
-        _literalExpressionBrand: any;
-    }
-    interface TemplateLiteralFragment extends LiteralLikeNode {
-        _templateLiteralFragmentBrand: any;
-    }
-    interface TemplateExpression extends PrimaryExpression {
-        head: TemplateLiteralFragment;
-        templateSpans: NodeArray<TemplateSpan>;
-    }
-    interface TemplateSpan extends Node {
-        expression: Expression;
-        literal: TemplateLiteralFragment;
-    }
-    interface ParenthesizedExpression extends PrimaryExpression {
-        expression: Expression;
-    }
-    interface ArrayLiteralExpression extends PrimaryExpression {
-        elements: NodeArray<Expression>;
-    }
-    interface SpreadElementExpression extends Expression {
-        expression: Expression;
-    }
-    interface ObjectLiteralExpression extends PrimaryExpression, Declaration {
-        properties: NodeArray<ObjectLiteralElement>;
-    }
-    interface PropertyAccessExpression extends MemberExpression, Declaration {
-        expression: LeftHandSideExpression;
-        dotToken: Node;
-        name: Identifier;
-    }
-    type IdentifierOrPropertyAccess = Identifier | PropertyAccessExpression;
-    interface ElementAccessExpression extends MemberExpression {
-        expression: LeftHandSideExpression;
-        argumentExpression?: Expression;
-    }
-    interface CallExpression extends LeftHandSideExpression, Declaration {
-        expression: LeftHandSideExpression;
-        typeArguments?: NodeArray<TypeNode>;
-        arguments: NodeArray<Expression>;
-    }
-    interface ExpressionWithTypeArguments extends TypeNode {
-        expression: LeftHandSideExpression;
-        typeArguments?: NodeArray<TypeNode>;
-    }
-    interface NewExpression extends CallExpression, PrimaryExpression {
-    }
-    interface TaggedTemplateExpression extends MemberExpression {
-        tag: LeftHandSideExpression;
-        template: LiteralExpression | TemplateExpression;
-    }
-    type CallLikeExpression = CallExpression | NewExpression | TaggedTemplateExpression | Decorator;
-    interface AsExpression extends Expression {
-        expression: Expression;
-        type: TypeNode;
-    }
-    interface TypeAssertion extends UnaryExpression {
-        type: TypeNode;
-        expression: UnaryExpression;
-    }
-    type AssertionExpression = TypeAssertion | AsExpression;
-    interface NonNullExpression extends LeftHandSideExpression {
-        expression: Expression;
-    }
-    interface JsxElement extends PrimaryExpression {
-        openingElement: JsxOpeningElement;
-        children: NodeArray<JsxChild>;
-        closingElement: JsxClosingElement;
-    }
-    interface JsxOpeningElement extends Expression {
-        _openingElementBrand?: any;
-        tagName: EntityName;
-        attributes: NodeArray<JsxAttribute | JsxSpreadAttribute>;
-    }
-    interface JsxSelfClosingElement extends PrimaryExpression, JsxOpeningElement {
-        _selfClosingElementBrand?: any;
-    }
-    type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
-    interface JsxAttribute extends Node {
-        name: Identifier;
-        initializer?: Expression;
-    }
-    interface JsxSpreadAttribute extends Node {
-        expression: Expression;
-    }
-    interface JsxClosingElement extends Node {
-        tagName: EntityName;
-    }
-    interface JsxExpression extends Expression {
-        expression?: Expression;
-    }
-    interface JsxText extends Node {
-        _jsxTextExpressionBrand: any;
-    }
-    type JsxChild = JsxText | JsxExpression | JsxElement | JsxSelfClosingElement;
-    interface Statement extends Node {
-        _statementBrand: any;
-    }
-    interface EmptyStatement extends Statement {
-    }
-    interface DebuggerStatement extends Statement {
-    }
-    interface MissingDeclaration extends DeclarationStatement, ClassElement, ObjectLiteralElement, TypeElement {
-        name?: Identifier;
-    }
-    type BlockLike = SourceFile | Block | ModuleBlock | CaseClause;
-    interface Block extends Statement {
-        statements: NodeArray<Statement>;
-    }
-    interface VariableStatement extends Statement {
-        declarationList: VariableDeclarationList;
-    }
-    interface ExpressionStatement extends Statement {
-        expression: Expression;
-    }
-    interface IfStatement extends Statement {
-        expression: Expression;
-        thenStatement: Statement;
-        elseStatement?: Statement;
-    }
-    interface IterationStatement extends Statement {
-        statement: Statement;
-    }
-    interface DoStatement extends IterationStatement {
-        expression: Expression;
-    }
-    interface WhileStatement extends IterationStatement {
-        expression: Expression;
-    }
-    interface ForStatement extends IterationStatement {
-        initializer?: VariableDeclarationList | Expression;
-        condition?: Expression;
-        incrementor?: Expression;
-    }
-    interface ForInStatement extends IterationStatement {
-        initializer: VariableDeclarationList | Expression;
-        expression: Expression;
-    }
-    interface ForOfStatement extends IterationStatement {
-        initializer: VariableDeclarationList | Expression;
-        expression: Expression;
-    }
-    interface BreakStatement extends Statement {
-        label?: Identifier;
-    }
-    interface ContinueStatement extends Statement {
-        label?: Identifier;
-    }
-    type BreakOrContinueStatement = BreakStatement | ContinueStatement;
-    interface ReturnStatement extends Statement {
-        expression?: Expression;
-    }
-    interface WithStatement extends Statement {
-        expression: Expression;
-        statement: Statement;
-    }
-    interface SwitchStatement extends Statement {
-        expression: Expression;
-        caseBlock: CaseBlock;
-    }
-    interface CaseBlock extends Node {
-        clauses: NodeArray<CaseOrDefaultClause>;
-    }
-    interface CaseClause extends Node {
-        expression: Expression;
-        statements: NodeArray<Statement>;
-    }
-    interface DefaultClause extends Node {
-        statements: NodeArray<Statement>;
-    }
-    type CaseOrDefaultClause = CaseClause | DefaultClause;
-    interface LabeledStatement extends Statement {
-        label: Identifier;
-        statement: Statement;
-    }
-    interface ThrowStatement extends Statement {
-        expression: Expression;
-    }
-    interface TryStatement extends Statement {
-        tryBlock: Block;
-        catchClause?: CatchClause;
-        finallyBlock?: Block;
-    }
-    interface CatchClause extends Node {
-        variableDeclaration: VariableDeclaration;
-        block: Block;
-    }
-    type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration;
-    interface ClassLikeDeclaration extends Declaration {
-        name?: Identifier;
-        typeParameters?: NodeArray<TypeParameterDeclaration>;
-        heritageClauses?: NodeArray<HeritageClause>;
-        members: NodeArray<ClassElement>;
-    }
-    interface ClassDeclaration extends ClassLikeDeclaration, DeclarationStatement {
-        name?: Identifier;
-    }
-    interface ClassExpression extends ClassLikeDeclaration, PrimaryExpression {
-    }
-    interface ClassElement extends Declaration {
-        _classElementBrand: any;
-        name?: PropertyName;
-    }
-    interface TypeElement extends Declaration {
-        _typeElementBrand: any;
-        name?: PropertyName;
-        questionToken?: Node;
-    }
-    interface InterfaceDeclaration extends DeclarationStatement {
-        name: Identifier;
-        typeParameters?: NodeArray<TypeParameterDeclaration>;
-        heritageClauses?: NodeArray<HeritageClause>;
-        members: NodeArray<TypeElement>;
-    }
-    interface HeritageClause extends Node {
-        token: SyntaxKind;
-        types?: NodeArray<ExpressionWithTypeArguments>;
-    }
-    interface TypeAliasDeclaration extends DeclarationStatement {
-        name: Identifier;
-        typeParameters?: NodeArray<TypeParameterDeclaration>;
-        type: TypeNode;
-    }
-    interface EnumMember extends Declaration {
-        name: DeclarationName;
-        initializer?: Expression;
-    }
-    interface EnumDeclaration extends DeclarationStatement {
-        name: Identifier;
-        members: NodeArray<EnumMember>;
-    }
-    type ModuleBody = ModuleBlock | ModuleDeclaration;
-    interface ModuleDeclaration extends DeclarationStatement {
-        name: Identifier | LiteralExpression;
-        body: ModuleBlock | ModuleDeclaration;
-    }
-    interface ModuleBlock extends Node, Statement {
-        statements: NodeArray<Statement>;
-    }
-    interface ImportEqualsDeclaration extends DeclarationStatement {
-        name: Identifier;
-        moduleReference: EntityName | ExternalModuleReference;
-    }
-    interface ExternalModuleReference extends Node {
-        expression?: Expression;
-    }
-    interface ImportDeclaration extends Statement {
-        importClause?: ImportClause;
-        moduleSpecifier: Expression;
-    }
-    interface ImportClause extends Declaration {
-        name?: Identifier;
-        namedBindings?: NamespaceImport | NamedImports;
-    }
-    interface NamespaceImport extends Declaration {
-        name: Identifier;
-    }
-    interface NamespaceExportDeclaration extends DeclarationStatement {
-        name: Identifier;
-        moduleReference: LiteralLikeNode;
-    }
-    interface ExportDeclaration extends DeclarationStatement {
-        exportClause?: NamedExports;
-        moduleSpecifier?: Expression;
-    }
-    interface NamedImports extends Node {
-        elements: NodeArray<ImportSpecifier>;
-    }
-    interface NamedExports extends Node {
-        elements: NodeArray<ExportSpecifier>;
-    }
-    type NamedImportsOrExports = NamedImports | NamedExports;
-    interface ImportSpecifier extends Declaration {
-        propertyName?: Identifier;
-        name: Identifier;
-    }
-    interface ExportSpecifier extends Declaration {
-        propertyName?: Identifier;
-        name: Identifier;
-    }
-    type ImportOrExportSpecifier = ImportSpecifier | ExportSpecifier;
-    interface ExportAssignment extends DeclarationStatement {
-        isExportEquals?: boolean;
-        expression: Expression;
-    }
-    interface FileReference extends TextRange {
-        fileName: string;
-    }
-    interface CommentRange extends TextRange {
-        hasTrailingNewLine?: boolean;
-        kind: SyntaxKind;
-    }
-    interface JSDocTypeExpression extends Node {
-        type: JSDocType;
-    }
-    interface JSDocType extends TypeNode {
-        _jsDocTypeBrand: any;
-    }
-    interface JSDocAllType extends JSDocType {
-        _JSDocAllTypeBrand: any;
-    }
-    interface JSDocUnknownType extends JSDocType {
-        _JSDocUnknownTypeBrand: any;
-    }
-    interface JSDocArrayType extends JSDocType {
-        elementType: JSDocType;
-    }
-    interface JSDocUnionType extends JSDocType {
-        types: NodeArray<JSDocType>;
-    }
-    interface JSDocTupleType extends JSDocType {
-        types: NodeArray<JSDocType>;
-    }
-    interface JSDocNonNullableType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocNullableType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocRecordType extends JSDocType, TypeLiteralNode {
-        members: NodeArray<JSDocRecordMember>;
-    }
-    interface JSDocTypeReference extends JSDocType {
-        name: EntityName;
-        typeArguments: NodeArray<JSDocType>;
-    }
-    interface JSDocOptionalType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocFunctionType extends JSDocType, SignatureDeclaration {
-        parameters: NodeArray<ParameterDeclaration>;
-        type: JSDocType;
-    }
-    interface JSDocVariadicType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocConstructorType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocThisType extends JSDocType {
-        type: JSDocType;
-    }
-    type JSDocTypeReferencingNode = JSDocThisType | JSDocConstructorType | JSDocVariadicType | JSDocOptionalType | JSDocNullableType | JSDocNonNullableType;
-    interface JSDocRecordMember extends PropertySignature {
-        name: Identifier | LiteralExpression;
-        type?: JSDocType;
-    }
-    interface JSDocComment extends Node {
-        tags: NodeArray<JSDocTag>;
-    }
-    interface JSDocTag extends Node {
-        atToken: Node;
-        tagName: Identifier;
-    }
-    interface JSDocTemplateTag extends JSDocTag {
-        typeParameters: NodeArray<TypeParameterDeclaration>;
-    }
-    interface JSDocReturnTag extends JSDocTag {
-        typeExpression: JSDocTypeExpression;
-    }
-    interface JSDocTypeTag extends JSDocTag {
-        typeExpression: JSDocTypeExpression;
-    }
-    interface JSDocParameterTag extends JSDocTag {
-        preParameterName?: Identifier;
-        typeExpression?: JSDocTypeExpression;
-        postParameterName?: Identifier;
-        isBracketed: boolean;
-    }
-    enum FlowFlags {
-        Unreachable = 1,
-        Start = 2,
-        BranchLabel = 4,
-        LoopLabel = 8,
-        Assignment = 16,
-        TrueCondition = 32,
-        FalseCondition = 64,
-        Referenced = 128,
-        Shared = 256,
-        Label = 12,
-        Condition = 96,
-    }
-    interface FlowNode {
-        flags: FlowFlags;
-        id?: number;
-    }
-    interface FlowLabel extends FlowNode {
-        antecedents: FlowNode[];
-    }
-    interface FlowAssignment extends FlowNode {
-        node: Expression | VariableDeclaration | BindingElement;
-        antecedent: FlowNode;
-    }
-    interface FlowCondition extends FlowNode {
-        expression: Expression;
-        antecedent: FlowNode;
-    }
-    interface AmdDependency {
-        path: string;
-        name: string;
-    }
-    interface SourceFile extends Declaration {
-        statements: NodeArray<Statement>;
-        endOfFileToken: Node;
-        fileName: string;
-        path: Path;
-        text: string;
-        amdDependencies: AmdDependency[];
-        moduleName: string;
-        referencedFiles: FileReference[];
-        typeReferenceDirectives: FileReference[];
-        languageVariant: LanguageVariant;
-        isDeclarationFile: boolean;
-        /**
-         * lib.d.ts should have a reference comment like
-         *
-         *  /// <reference no-default-lib="true"/>
-         *
-         * If any other file has this comment, it signals not to include lib.d.ts
-         * because this containing file is intended to act as a default library.
-         */
-        hasNoDefaultLib: boolean;
-        languageVersion: ScriptTarget;
-    }
-    interface ScriptReferenceHost {
-        getCompilerOptions(): CompilerOptions;
-        getSourceFile(fileName: string): SourceFile;
-        getSourceFileByPath(path: Path): SourceFile;
-        getCurrentDirectory(): string;
-    }
-    interface ParseConfigHost {
-        readDirectory(rootDir: string, extension: string, exclude: string[]): string[];
-    }
-    interface WriteFileCallback {
-        (fileName: string, data: string, writeByteOrderMark: boolean, onError?: (message: string) => void, sourceFiles?: SourceFile[]): void;
-    }
-    class OperationCanceledException {
-    }
-    interface CancellationToken {
-        isCancellationRequested(): boolean;
-        /** @throws OperationCanceledException if isCancellationRequested is true */
-        throwIfCancellationRequested(): void;
-    }
-    interface Program extends ScriptReferenceHost {
-        /**
-         * Get a list of root file names that were passed to a 'createProgram'
-         */
-        getRootFileNames(): string[];
-        /**
-         * Get a list of files in the program
-         */
-        getSourceFiles(): SourceFile[];
-        /**
-         * Emits the JavaScript and declaration files.  If targetSourceFile is not specified, then
-         * the JavaScript and declaration files will be produced for all the files in this program.
-         * If targetSourceFile is specified, then only the JavaScript and declaration for that
-         * specific file will be generated.
-         *
-         * If writeFile is not specified then the writeFile callback from the compiler host will be
-         * used for writing the JavaScript and declaration files.  Otherwise, the writeFile parameter
-         * will be invoked when writing the JavaScript and declaration files.
-         */
-        emit(targetSourceFile?: SourceFile, writeFile?: WriteFileCallback, cancellationToken?: CancellationToken): EmitResult;
-        getOptionsDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
-        getGlobalDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
-        getSyntacticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-        getSemanticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-        getDeclarationDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-        /**
-         * Gets a type checker that can be used to semantically analyze source fils in the program.
-         */
-        getTypeChecker(): TypeChecker;
-    }
-    interface SourceMapSpan {
-        /** Line number in the .js file. */
-        emittedLine: number;
-        /** Column number in the .js file. */
-        emittedColumn: number;
-        /** Line number in the .ts file. */
-        sourceLine: number;
-        /** Column number in the .ts file. */
-        sourceColumn: number;
-        /** Optional name (index into names array) associated with this span. */
-        nameIndex?: number;
-        /** .ts file (index into sources array) associated with this span */
-        sourceIndex: number;
-    }
-    interface SourceMapData {
-        sourceMapFilePath: string;
-        jsSourceMappingURL: string;
-        sourceMapFile: string;
-        sourceMapSourceRoot: string;
-        sourceMapSources: string[];
-        sourceMapSourcesContent?: string[];
-        inputSourceFileNames: string[];
-        sourceMapNames?: string[];
-        sourceMapMappings: string;
-        sourceMapDecodedMappings: SourceMapSpan[];
-    }
-    /** Return code used by getEmitOutput function to indicate status of the function */
-    enum ExitStatus {
-        Success = 0,
-        DiagnosticsPresent_OutputsSkipped = 1,
-        DiagnosticsPresent_OutputsGenerated = 2,
-    }
-    interface EmitResult {
-        emitSkipped: boolean;
-        /** Contains declaration emit diagnostics */
-        diagnostics: Diagnostic[];
-        emittedFiles: string[];
-    }
-    interface TypeChecker {
-        getTypeOfSymbolAtLocation(symbol: Symbol, node: Node): Type;
-        getDeclaredTypeOfSymbol(symbol: Symbol): Type;
-        getPropertiesOfType(type: Type): Symbol[];
-        getPropertyOfType(type: Type, propertyName: string): Symbol;
-        getSignaturesOfType(type: Type, kind: SignatureKind): Signature[];
-        getIndexTypeOfType(type: Type, kind: IndexKind): Type;
-        getBaseTypes(type: InterfaceType): ObjectType[];
-        getReturnTypeOfSignature(signature: Signature): Type;
-        getNonNullableType(type: Type): Type;
-        getSymbolsInScope(location: Node, meaning: SymbolFlags): Symbol[];
-        getSymbolAtLocation(node: Node): Symbol;
-        getSymbolsOfParameterPropertyDeclaration(parameter: ParameterDeclaration, parameterName: string): Symbol[];
-        getShorthandAssignmentValueSymbol(location: Node): Symbol;
-        getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol;
-        getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol;
-        getTypeAtLocation(node: Node): Type;
-        typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
-        symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): string;
-        getSymbolDisplayBuilder(): SymbolDisplayBuilder;
-        getFullyQualifiedName(symbol: Symbol): string;
-        getAugmentedPropertiesOfType(type: Type): Symbol[];
-        getRootSymbols(symbol: Symbol): Symbol[];
-        getContextualType(node: Expression): Type;
-        getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature;
-        getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature;
-        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
-        isUndefinedSymbol(symbol: Symbol): boolean;
-        isArgumentsSymbol(symbol: Symbol): boolean;
-        isUnknownSymbol(symbol: Symbol): boolean;
-        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
-        isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName, propertyName: string): boolean;
-        getAliasedSymbol(symbol: Symbol): Symbol;
-        getExportsOfModule(moduleSymbol: Symbol): Symbol[];
-        getJsxElementAttributesType(elementNode: JsxOpeningLikeElement): Type;
-        getJsxIntrinsicTagNames(): Symbol[];
-        isOptionalParameter(node: ParameterDeclaration): boolean;
-    }
-    interface SymbolDisplayBuilder {
-        buildTypeDisplay(type: Type, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildSymbolDisplay(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): void;
-        buildSignatureDisplay(signatures: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
-        buildParameterDisplay(parameter: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildTypeParameterDisplay(tp: TypeParameter, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildTypePredicateDisplay(predicate: TypePredicate, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildTypeParameterDisplayFromSymbol(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildDisplayForParametersAndDelimiters(thisType: Type, parameters: Symbol[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildDisplayForTypeParametersAndDelimiters(typeParameters: TypeParameter[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildReturnTypeDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-    }
-    interface SymbolWriter {
-        writeKeyword(text: string): void;
-        writeOperator(text: string): void;
-        writePunctuation(text: string): void;
-        writeSpace(text: string): void;
-        writeStringLiteral(text: string): void;
-        writeParameter(text: string): void;
-        writeSymbol(text: string, symbol: Symbol): void;
-        writeLine(): void;
-        increaseIndent(): void;
-        decreaseIndent(): void;
-        clear(): void;
-        trackSymbol(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): void;
-        reportInaccessibleThisError(): void;
-    }
-    enum TypeFormatFlags {
-        None = 0,
-        WriteArrayAsGenericType = 1,
-        UseTypeOfFunction = 2,
-        NoTruncation = 4,
-        WriteArrowStyleSignature = 8,
-        WriteOwnNameForAnyLike = 16,
-        WriteTypeArgumentsOfSignature = 32,
-        InElementType = 64,
-        UseFullyQualifiedType = 128,
-        InFirstTypeArgument = 256,
-    }
-    enum SymbolFormatFlags {
-        None = 0,
-        WriteTypeParametersOrArguments = 1,
-        UseOnlyExternalAliasing = 2,
-    }
-    enum TypePredicateKind {
-        This = 0,
-        Identifier = 1,
-    }
-    interface TypePredicateBase {
-        kind: TypePredicateKind;
-        type: Type;
-    }
-    interface ThisTypePredicate extends TypePredicateBase {
-        _thisTypePredicateBrand: any;
-    }
-    interface IdentifierTypePredicate extends TypePredicateBase {
-        parameterName: string;
-        parameterIndex: number;
-    }
-    type TypePredicate = IdentifierTypePredicate | ThisTypePredicate;
-    enum SymbolFlags {
-        None = 0,
-        FunctionScopedVariable = 1,
-        BlockScopedVariable = 2,
-        Property = 4,
-        EnumMember = 8,
-        Function = 16,
-        Class = 32,
-        Interface = 64,
-        ConstEnum = 128,
-        RegularEnum = 256,
-        ValueModule = 512,
-        NamespaceModule = 1024,
-        TypeLiteral = 2048,
-        ObjectLiteral = 4096,
-        Method = 8192,
-        Constructor = 16384,
-        GetAccessor = 32768,
-        SetAccessor = 65536,
-        Signature = 131072,
-        TypeParameter = 262144,
-        TypeAlias = 524288,
-        ExportValue = 1048576,
-        ExportType = 2097152,
-        ExportNamespace = 4194304,
-        Alias = 8388608,
-        Instantiated = 16777216,
-        Merged = 33554432,
-        Transient = 67108864,
-        Prototype = 134217728,
-        SyntheticProperty = 268435456,
-        Optional = 536870912,
-        ExportStar = 1073741824,
-        Enum = 384,
-        Variable = 3,
-        Value = 107455,
-        Type = 793056,
-        Namespace = 1536,
-        Module = 1536,
-        Accessor = 98304,
-        FunctionScopedVariableExcludes = 107454,
-        BlockScopedVariableExcludes = 107455,
-        ParameterExcludes = 107455,
-        PropertyExcludes = 0,
-        EnumMemberExcludes = 107455,
-        FunctionExcludes = 106927,
-        ClassExcludes = 899519,
-        InterfaceExcludes = 792960,
-        RegularEnumExcludes = 899327,
-        ConstEnumExcludes = 899967,
-        ValueModuleExcludes = 106639,
-        NamespaceModuleExcludes = 0,
-        MethodExcludes = 99263,
-        GetAccessorExcludes = 41919,
-        SetAccessorExcludes = 74687,
-        TypeParameterExcludes = 530912,
-        TypeAliasExcludes = 793056,
-        AliasExcludes = 8388608,
-        ModuleMember = 8914931,
-        ExportHasLocal = 944,
-        HasExports = 1952,
-        HasMembers = 6240,
-        BlockScoped = 418,
-        PropertyOrAccessor = 98308,
-        Export = 7340032,
-    }
-    interface Symbol {
-        flags: SymbolFlags;
-        name: string;
-        declarations?: Declaration[];
-        valueDeclaration?: Declaration;
-        members?: SymbolTable;
-        exports?: SymbolTable;
-        globalExports?: SymbolTable;
-    }
-    interface SymbolTable {
-        [index: string]: Symbol;
-    }
-    enum TypeFlags {
-        Any = 1,
-        String = 2,
-        Number = 4,
-        Boolean = 8,
-        Void = 16,
-        Undefined = 32,
-        Null = 64,
-        Enum = 128,
-        StringLiteral = 256,
-        TypeParameter = 512,
-        Class = 1024,
-        Interface = 2048,
-        Reference = 4096,
-        Tuple = 8192,
-        Union = 16384,
-        Intersection = 32768,
-        Anonymous = 65536,
-        Instantiated = 131072,
-        ObjectLiteral = 524288,
-        ESSymbol = 16777216,
-        ThisType = 33554432,
-        ObjectLiteralPatternWithComputedProperties = 67108864,
-        Never = 134217728,
-        StringLike = 258,
-        NumberLike = 132,
-        ObjectType = 80896,
-        UnionOrIntersection = 49152,
-        StructuredType = 130048,
-        Narrowable = 97793,
-    }
-    type DestructuringPattern = BindingPattern | ObjectLiteralExpression | ArrayLiteralExpression;
-    interface Type {
-        flags: TypeFlags;
-        symbol?: Symbol;
-        pattern?: DestructuringPattern;
-    }
-    interface StringLiteralType extends Type {
-        text: string;
-    }
-    interface ObjectType extends Type {
-    }
-    interface InterfaceType extends ObjectType {
-        typeParameters: TypeParameter[];
-        outerTypeParameters: TypeParameter[];
-        localTypeParameters: TypeParameter[];
-        thisType: TypeParameter;
-    }
-    interface InterfaceTypeWithDeclaredMembers extends InterfaceType {
-        declaredProperties: Symbol[];
-        declaredCallSignatures: Signature[];
-        declaredConstructSignatures: Signature[];
-        declaredStringIndexInfo: IndexInfo;
-        declaredNumberIndexInfo: IndexInfo;
-    }
-    interface TypeReference extends ObjectType {
-        target: GenericType;
-        typeArguments: Type[];
-    }
-    interface GenericType extends InterfaceType, TypeReference {
-    }
-    interface TupleType extends ObjectType {
-        elementTypes: Type[];
-    }
-    interface UnionOrIntersectionType extends Type {
-        types: Type[];
-    }
-    interface UnionType extends UnionOrIntersectionType {
-    }
-    interface IntersectionType extends UnionOrIntersectionType {
-    }
-    interface TypeParameter extends Type {
-        constraint: Type;
-    }
-    enum SignatureKind {
-        Call = 0,
-        Construct = 1,
-    }
-    interface Signature {
-        declaration: SignatureDeclaration;
-        typeParameters: TypeParameter[];
-        parameters: Symbol[];
-        thisType?: Type;
-    }
-    enum IndexKind {
-        String = 0,
-        Number = 1,
-    }
-    interface IndexInfo {
-        type: Type;
-        isReadonly: boolean;
-        declaration?: SignatureDeclaration;
-    }
-    interface DiagnosticMessage {
-        key: string;
-        category: DiagnosticCategory;
-        code: number;
-        message: string;
-    }
-    /**
-     * A linked list of formatted diagnostic messages to be used as part of a multiline message.
-     * It is built from the bottom up, leaving the head to be the "main" diagnostic.
-     * While it seems that DiagnosticMessageChain is structurally similar to DiagnosticMessage,
-     * the difference is that messages are all preformatted in DMC.
-     */
-    interface DiagnosticMessageChain {
-        messageText: string;
-        category: DiagnosticCategory;
-        code: number;
-        next?: DiagnosticMessageChain;
-    }
-    interface Diagnostic {
-        file: SourceFile;
-        start: number;
-        length: number;
-        messageText: string | DiagnosticMessageChain;
-        category: DiagnosticCategory;
-        code: number;
-    }
-    enum DiagnosticCategory {
-        Warning = 0,
-        Error = 1,
-        Message = 2,
-    }
-    enum ModuleResolutionKind {
-        Classic = 1,
-        NodeJs = 2,
-    }
-    type RootPaths = string[];
-    type PathSubstitutions = Map<string[]>;
-    type TsConfigOnlyOptions = RootPaths | PathSubstitutions;
-    type CompilerOptionsValue = string | number | boolean | (string | number)[] | TsConfigOnlyOptions;
-    interface CompilerOptions {
-        allowNonTsExtensions?: boolean;
-        charset?: string;
-        declaration?: boolean;
-        declarationDir?: string;
-        diagnostics?: boolean;
-        emitBOM?: boolean;
-        help?: boolean;
-        init?: boolean;
-        inlineSourceMap?: boolean;
-        inlineSources?: boolean;
-        jsx?: JsxEmit;
-        reactNamespace?: string;
-        listFiles?: boolean;
-        typesSearchPaths?: string[];
-        locale?: string;
-        mapRoot?: string;
-        module?: ModuleKind;
-        newLine?: NewLineKind;
-        noEmit?: boolean;
-        noEmitHelpers?: boolean;
-        noEmitOnError?: boolean;
-        noErrorTruncation?: boolean;
-        noImplicitAny?: boolean;
-        noImplicitThis?: boolean;
-        noLib?: boolean;
-        noResolve?: boolean;
-        out?: string;
-        outFile?: string;
-        outDir?: string;
-        preserveConstEnums?: boolean;
-        project?: string;
-        removeComments?: boolean;
-        rootDir?: string;
-        sourceMap?: boolean;
-        sourceRoot?: string;
-        suppressExcessPropertyErrors?: boolean;
-        suppressImplicitAnyIndexErrors?: boolean;
-        target?: ScriptTarget;
-        version?: boolean;
-        watch?: boolean;
-        isolatedModules?: boolean;
-        experimentalDecorators?: boolean;
-        emitDecoratorMetadata?: boolean;
-        moduleResolution?: ModuleResolutionKind;
-        allowUnusedLabels?: boolean;
-        allowUnreachableCode?: boolean;
-        noImplicitReturns?: boolean;
-        noFallthroughCasesInSwitch?: boolean;
-        forceConsistentCasingInFileNames?: boolean;
-        baseUrl?: string;
-        paths?: PathSubstitutions;
-        rootDirs?: RootPaths;
-        traceResolution?: boolean;
-        allowSyntheticDefaultImports?: boolean;
-        allowJs?: boolean;
-        noImplicitUseStrict?: boolean;
-        strictNullChecks?: boolean;
-        skipLibCheck?: boolean;
-        listEmittedFiles?: boolean;
-        lib?: string[];
-        types?: string[];
-        list?: string[];
-        [option: string]: CompilerOptionsValue | undefined;
-    }
-    interface TypingOptions {
-        enableAutoDiscovery?: boolean;
-        include?: string[];
-        exclude?: string[];
-        [option: string]: string[] | boolean | undefined;
-    }
-    interface DiscoverTypingsInfo {
-        fileNames: string[];
-        projectRootPath: string;
-        safeListPath: string;
-        packageNameToTypingLocation: Map<string>;
-        typingOptions: TypingOptions;
-        compilerOptions: CompilerOptions;
-    }
-    enum ModuleKind {
-        None = 0,
-        CommonJS = 1,
-        AMD = 2,
-        UMD = 3,
-        System = 4,
-        ES6 = 5,
-        ES2015 = 5,
-    }
-    enum JsxEmit {
-        None = 0,
-        Preserve = 1,
-        React = 2,
-    }
-    enum NewLineKind {
-        CarriageReturnLineFeed = 0,
-        LineFeed = 1,
-    }
-    interface LineAndCharacter {
-        line: number;
-        character: number;
-    }
-    enum ScriptKind {
-        Unknown = 0,
-        JS = 1,
-        JSX = 2,
-        TS = 3,
-        TSX = 4,
-    }
-    enum ScriptTarget {
-        ES3 = 0,
-        ES5 = 1,
-        ES6 = 2,
-        ES2015 = 2,
-        Latest = 2,
-    }
-    enum LanguageVariant {
-        Standard = 0,
-        JSX = 1,
-    }
-    interface ParsedCommandLine {
-        options: CompilerOptions;
-        typingOptions?: TypingOptions;
-        fileNames: string[];
-        raw?: any;
-        errors: Diagnostic[];
-    }
-    interface ModuleResolutionHost {
-        fileExists(fileName: string): boolean;
-        readFile(fileName: string): string;
-        trace?(s: string): void;
-        directoryExists?(directoryName: string): boolean;
-        realpath?(path: string): string;
-        getCurrentDirectory?(): string;
-    }
-    interface ResolvedModule {
-        resolvedFileName: string;
-        isExternalLibraryImport?: boolean;
-    }
-    interface ResolvedModuleWithFailedLookupLocations {
-        resolvedModule: ResolvedModule;
-        failedLookupLocations: string[];
-    }
-    interface ResolvedTypeReferenceDirective {
-        primary: boolean;
-        resolvedFileName?: string;
-    }
-    interface ResolvedTypeReferenceDirectiveWithFailedLookupLocations {
-        resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective;
-        failedLookupLocations: string[];
-    }
-    interface CompilerHost extends ModuleResolutionHost {
-        getSourceFile(fileName: string, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile;
-        getSourceFileByPath?(fileName: string, path: Path, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile;
-        getCancellationToken?(): CancellationToken;
-        getDefaultLibFileName(options: CompilerOptions): string;
-        getDefaultLibLocation?(): string;
-        getDefaultTypeDirectiveNames?(rootPath: string): string[];
-        writeFile: WriteFileCallback;
-        getCurrentDirectory(): string;
-        getCanonicalFileName(fileName: string): string;
-        useCaseSensitiveFileNames(): boolean;
-        getNewLine(): string;
-        resolveModuleNames?(moduleNames: string[], containingFile: string): ResolvedModule[];
-        /**
-         * This method is a companion for 'resolveModuleNames' and is used to resolve 'types' references to actual type declaration files
-         */
-        resolveTypeReferenceDirectives?(typeReferenceDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
-    }
-    interface TextSpan {
-        start: number;
-        length: number;
-    }
-    interface TextChangeRange {
-        span: TextSpan;
-        newLength: number;
-    }
-}
-declare namespace ts {
-    type FileWatcherCallback = (fileName: string, removed?: boolean) => void;
-    type DirectoryWatcherCallback = (directoryName: string) => void;
-    interface WatchedFile {
-        fileName: string;
-        callback: FileWatcherCallback;
-        mtime?: Date;
-    }
-    interface System {
-        args: string[];
-        newLine: string;
-        useCaseSensitiveFileNames: boolean;
-        write(s: string): void;
-        readFile(path: string, encoding?: string): string;
-        writeFile(path: string, data: string, writeByteOrderMark?: boolean): void;
-        watchFile?(path: string, callback: FileWatcherCallback): FileWatcher;
-        watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
-        resolvePath(path: string): string;
-        fileExists(path: string): boolean;
-        directoryExists(path: string): boolean;
-        createDirectory(path: string): void;
-        getExecutingFilePath(): string;
-        getCurrentDirectory(): string;
-        getDirectories(path: string): string[];
-        readDirectory(path: string, extension?: string, exclude?: string[]): string[];
-        getModifiedTime?(path: string): Date;
-        createHash?(data: string): string;
-        getMemoryUsage?(): number;
-        exit(exitCode?: number): void;
-        realpath?(path: string): string;
-    }
-    interface FileWatcher {
-        close(): void;
-    }
-    interface DirectoryWatcher extends FileWatcher {
-        directoryName: string;
-        referenceCount: number;
-    }
-    var sys: System;
-}
-declare namespace ts {
-    interface ErrorCallback {
-        (message: DiagnosticMessage, length: number): void;
-    }
-    interface Scanner {
-        getStartPos(): number;
-        getToken(): SyntaxKind;
-        getTextPos(): number;
-        getTokenPos(): number;
-        getTokenText(): string;
-        getTokenValue(): string;
-        hasExtendedUnicodeEscape(): boolean;
-        hasPrecedingLineBreak(): boolean;
-        isIdentifier(): boolean;
-        isReservedWord(): boolean;
-        isUnterminated(): boolean;
-        reScanGreaterToken(): SyntaxKind;
-        reScanSlashToken(): SyntaxKind;
-        reScanTemplateToken(): SyntaxKind;
-        scanJsxIdentifier(): SyntaxKind;
-        reScanJsxToken(): SyntaxKind;
-        scanJsxToken(): SyntaxKind;
-        scanJSDocToken(): SyntaxKind;
-        scan(): SyntaxKind;
-        setText(text: string, start?: number, length?: number): void;
-        setOnError(onError: ErrorCallback): void;
-        setScriptTarget(scriptTarget: ScriptTarget): void;
-        setLanguageVariant(variant: LanguageVariant): void;
-        setTextPos(textPos: number): void;
-        lookAhead<T>(callback: () => T): T;
-        scanRange<T>(start: number, length: number, callback: () => T): T;
-        tryScan<T>(callback: () => T): T;
-    }
-    function tokenToString(t: SyntaxKind): string;
-    function getPositionOfLineAndCharacter(sourceFile: SourceFile, line: number, character: number): number;
-    function getLineAndCharacterOfPosition(sourceFile: SourceFile, position: number): LineAndCharacter;
-    function isWhiteSpace(ch: number): boolean;
-    function isLineBreak(ch: number): boolean;
-    function couldStartTrivia(text: string, pos: number): boolean;
-    function getLeadingCommentRanges(text: string, pos: number): CommentRange[];
-    function getTrailingCommentRanges(text: string, pos: number): CommentRange[];
-    /** Optionally, get the shebang */
-    function getShebang(text: string): string;
-    function isIdentifierStart(ch: number, languageVersion: ScriptTarget): boolean;
-    function isIdentifierPart(ch: number, languageVersion: ScriptTarget): boolean;
-    function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, text?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
-}
-declare namespace ts {
-    function getDefaultLibFileName(options: CompilerOptions): string;
-    function textSpanEnd(span: TextSpan): number;
-    function textSpanIsEmpty(span: TextSpan): boolean;
-    function textSpanContainsPosition(span: TextSpan, position: number): boolean;
-    function textSpanContainsTextSpan(span: TextSpan, other: TextSpan): boolean;
-    function textSpanOverlapsWith(span: TextSpan, other: TextSpan): boolean;
-    function textSpanOverlap(span1: TextSpan, span2: TextSpan): TextSpan;
-    function textSpanIntersectsWithTextSpan(span: TextSpan, other: TextSpan): boolean;
-    function textSpanIntersectsWith(span: TextSpan, start: number, length: number): boolean;
-    function decodedTextSpanIntersectsWith(start1: number, length1: number, start2: number, length2: number): boolean;
-    function textSpanIntersectsWithPosition(span: TextSpan, position: number): boolean;
-    function textSpanIntersection(span1: TextSpan, span2: TextSpan): TextSpan;
-    function createTextSpan(start: number, length: number): TextSpan;
-    function createTextSpanFromBounds(start: number, end: number): TextSpan;
-    function textChangeRangeNewSpan(range: TextChangeRange): TextSpan;
-    function textChangeRangeIsUnchanged(range: TextChangeRange): boolean;
-    function createTextChangeRange(span: TextSpan, newLength: number): TextChangeRange;
-    let unchangedTextChangeRange: TextChangeRange;
-    /**
-     * Called to merge all the changes that occurred across several versions of a script snapshot
-     * into a single change.  i.e. if a user keeps making successive edits to a script we will
-     * have a text change from V1 to V2, V2 to V3, ..., Vn.
-     *
-     * This function will then merge those changes into a single change range valid between V1 and
-     * Vn.
-     */
-    function collapseTextChangeRangesAcrossMultipleVersions(changes: TextChangeRange[]): TextChangeRange;
-    function getTypeParameterOwner(d: Declaration): Declaration;
-    function isParameterPropertyDeclaration(node: ParameterDeclaration): boolean;
-    function startsWith(str: string, prefix: string): boolean;
-    function endsWith(str: string, suffix: string): boolean;
-}
-declare namespace ts {
-    function createNode(kind: SyntaxKind, pos?: number, end?: number): Node;
-    function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodeArray?: (nodes: Node[]) => T): T;
-    function createSourceFile(fileName: string, sourceText: string, languageVersion: ScriptTarget, setParentNodes?: boolean, scriptKind?: ScriptKind): SourceFile;
-    function isExternalModule(file: SourceFile): boolean;
-    function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
-}
-declare namespace ts {
-    const version: string;
-    function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean): string;
-    function resolveTripleslashReference(moduleName: string, containingFile: string): string;
-    /**
-     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
-     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
-     * is assumed to be the same as root directory of the project.
-     */
-    function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string, options: CompilerOptions, host: ModuleResolutionHost): ResolvedTypeReferenceDirectiveWithFailedLookupLocations;
-    function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-    function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-    function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
-    function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-    function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
-    function getDefaultTypeDirectiveNames(options: CompilerOptions, rootFiles: string[], host: CompilerHost): string[];
-    function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program;
-}
-declare namespace ts {
-    /**
-      * Read tsconfig.json file
-      * @param fileName The path to the config file
-      */
-    function readConfigFile(fileName: string, readFile: (path: string) => string): {
-        config?: any;
-        error?: Diagnostic;
-    };
-    /**
-      * Parse the text of the tsconfig.json file
-      * @param fileName The path to the config file
-      * @param jsonText The text of the config file
-      */
-    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
-        config?: any;
-        error?: Diagnostic;
-    };
-    /**
-      * Parse the contents of a config file (tsconfig.json).
-      * @param json The contents of the config file to parse
-      * @param host Instance of ParseConfigHost used to enumerate files in folder.
-      * @param basePath A root directory to resolve relative path entries in the config
-      *    file to. e.g. outDir
-      */
-    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string): ParsedCommandLine;
-    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: CompilerOptions;
-        errors: Diagnostic[];
-    };
-    function convertTypingOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: CompilerOptions;
-        errors: Diagnostic[];
-    };
-}
-declare namespace ts {
-    /** The version of the language service API */
-    const servicesVersion: string;
-    interface Node {
-        getSourceFile(): SourceFile;
-        getChildCount(sourceFile?: SourceFile): number;
-        getChildAt(index: number, sourceFile?: SourceFile): Node;
-        getChildren(sourceFile?: SourceFile): Node[];
-        getStart(sourceFile?: SourceFile): number;
-        getFullStart(): number;
-        getEnd(): number;
-        getWidth(sourceFile?: SourceFile): number;
-        getFullWidth(): number;
-        getLeadingTriviaWidth(sourceFile?: SourceFile): number;
-        getFullText(sourceFile?: SourceFile): string;
-        getText(sourceFile?: SourceFile): string;
-        getFirstToken(sourceFile?: SourceFile): Node;
-        getLastToken(sourceFile?: SourceFile): Node;
-    }
-    interface Symbol {
-        getFlags(): SymbolFlags;
-        getName(): string;
-        getDeclarations(): Declaration[];
-        getDocumentationComment(): SymbolDisplayPart[];
-    }
-    interface Type {
-        getFlags(): TypeFlags;
-        getSymbol(): Symbol;
-        getProperties(): Symbol[];
-        getProperty(propertyName: string): Symbol;
-        getApparentProperties(): Symbol[];
-        getCallSignatures(): Signature[];
-        getConstructSignatures(): Signature[];
-        getStringIndexType(): Type;
-        getNumberIndexType(): Type;
-        getBaseTypes(): ObjectType[];
-        getNonNullableType(): Type;
-    }
-    interface Signature {
-        getDeclaration(): SignatureDeclaration;
-        getTypeParameters(): Type[];
-        getParameters(): Symbol[];
-        getReturnType(): Type;
-        getDocumentationComment(): SymbolDisplayPart[];
-    }
-    interface SourceFile {
-        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
-        getLineStarts(): number[];
-        getPositionOfLineAndCharacter(line: number, character: number): number;
-        update(newText: string, textChangeRange: TextChangeRange): SourceFile;
-    }
-    /**
-     * Represents an immutable snapshot of a script at a specified time.Once acquired, the
-     * snapshot is observably immutable. i.e. the same calls with the same parameters will return
-     * the same values.
-     */
-    interface IScriptSnapshot {
-        /** Gets a portion of the script snapshot specified by [start, end). */
-        getText(start: number, end: number): string;
-        /** Gets the length of this script snapshot. */
-        getLength(): number;
-        /**
-         * Gets the TextChangeRange that describe how the text changed between this text and
-         * an older version.  This information is used by the incremental parser to determine
-         * what sections of the script need to be re-parsed.  'undefined' can be returned if the
-         * change range cannot be determined.  However, in that case, incremental parsing will
-         * not happen and the entire document will be re - parsed.
-         */
-        getChangeRange(oldSnapshot: IScriptSnapshot): TextChangeRange;
-        /** Releases all resources held by this script snapshot */
-        dispose?(): void;
-    }
-    namespace ScriptSnapshot {
-        function fromString(text: string): IScriptSnapshot;
-    }
-    interface PreProcessedFileInfo {
-        referencedFiles: FileReference[];
-        typeReferenceDirectives: FileReference[];
-        importedFiles: FileReference[];
-        ambientExternalModules: string[];
-        isLibFile: boolean;
-    }
-    interface HostCancellationToken {
-        isCancellationRequested(): boolean;
-    }
-    interface LanguageServiceHost {
-        getCompilationSettings(): CompilerOptions;
-        getNewLine?(): string;
-        getProjectVersion?(): string;
-        getScriptFileNames(): string[];
-        getScriptKind?(fileName: string): ScriptKind;
-        getScriptVersion(fileName: string): string;
-        getScriptSnapshot(fileName: string): IScriptSnapshot | undefined;
-        getLocalizedDiagnosticMessages?(): any;
-        getCancellationToken?(): HostCancellationToken;
-        getCurrentDirectory(): string;
-        getDefaultLibFileName(options: CompilerOptions): string;
-        log?(s: string): void;
-        trace?(s: string): void;
-        error?(s: string): void;
-        useCaseSensitiveFileNames?(): boolean;
-        resolveModuleNames?(moduleNames: string[], containingFile: string): ResolvedModule[];
-        resolveTypeReferenceDirectives?(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
-        directoryExists?(directoryName: string): boolean;
-    }
-    interface LanguageService {
-        cleanupSemanticCache(): void;
-        getSyntacticDiagnostics(fileName: string): Diagnostic[];
-        getSemanticDiagnostics(fileName: string): Diagnostic[];
-        getCompilerOptionsDiagnostics(): Diagnostic[];
-        /**
-         * @deprecated Use getEncodedSyntacticClassifications instead.
-         */
-        getSyntacticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[];
-        /**
-         * @deprecated Use getEncodedSemanticClassifications instead.
-         */
-        getSemanticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[];
-        getEncodedSyntacticClassifications(fileName: string, span: TextSpan): Classifications;
-        getEncodedSemanticClassifications(fileName: string, span: TextSpan): Classifications;
-        getCompletionsAtPosition(fileName: string, position: number): CompletionInfo;
-        getCompletionEntryDetails(fileName: string, position: number, entryName: string): CompletionEntryDetails;
-        getQuickInfoAtPosition(fileName: string, position: number): QuickInfo;
-        getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): TextSpan;
-        getBreakpointStatementAtPosition(fileName: string, position: number): TextSpan;
-        getSignatureHelpItems(fileName: string, position: number): SignatureHelpItems;
-        getRenameInfo(fileName: string, position: number): RenameInfo;
-        findRenameLocations(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): RenameLocation[];
-        getDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[];
-        getTypeDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[];
-        getReferencesAtPosition(fileName: string, position: number): ReferenceEntry[];
-        findReferences(fileName: string, position: number): ReferencedSymbol[];
-        getDocumentHighlights(fileName: string, position: number, filesToSearch: string[]): DocumentHighlights[];
-        /** @deprecated */
-        getOccurrencesAtPosition(fileName: string, position: number): ReferenceEntry[];
-        getNavigateToItems(searchValue: string, maxResultCount?: number): NavigateToItem[];
-        getNavigationBarItems(fileName: string): NavigationBarItem[];
-        getOutliningSpans(fileName: string): OutliningSpan[];
-        getTodoComments(fileName: string, descriptors: TodoCommentDescriptor[]): TodoComment[];
-        getBraceMatchingAtPosition(fileName: string, position: number): TextSpan[];
-        getIndentationAtPosition(fileName: string, position: number, options: EditorOptions): number;
-        getFormattingEditsForRange(fileName: string, start: number, end: number, options: FormatCodeOptions): TextChange[];
-        getFormattingEditsForDocument(fileName: string, options: FormatCodeOptions): TextChange[];
-        getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: FormatCodeOptions): TextChange[];
-        getDocCommentTemplateAtPosition(fileName: string, position: number): TextInsertion;
-        isValidBraceCompletionAtPostion(fileName: string, position: number, openingBrace: number): boolean;
-        getEmitOutput(fileName: string): EmitOutput;
-        getProgram(): Program;
-        dispose(): void;
-    }
-    interface Classifications {
-        spans: number[];
-        endOfLineState: EndOfLineState;
-    }
-    interface ClassifiedSpan {
-        textSpan: TextSpan;
-        classificationType: string;
-    }
-    interface NavigationBarItem {
-        text: string;
-        kind: string;
-        kindModifiers: string;
-        spans: TextSpan[];
-        childItems: NavigationBarItem[];
-        indent: number;
-        bolded: boolean;
-        grayed: boolean;
-    }
-    interface TodoCommentDescriptor {
-        text: string;
-        priority: number;
-    }
-    interface TodoComment {
-        descriptor: TodoCommentDescriptor;
-        message: string;
-        position: number;
-    }
-    class TextChange {
-        span: TextSpan;
-        newText: string;
-    }
-    interface TextInsertion {
-        newText: string;
-        /** The position in newText the caret should point to after the insertion. */
-        caretOffset: number;
-    }
-    interface RenameLocation {
-        textSpan: TextSpan;
-        fileName: string;
-    }
-    interface ReferenceEntry {
-        textSpan: TextSpan;
-        fileName: string;
-        isWriteAccess: boolean;
-    }
-    interface DocumentHighlights {
-        fileName: string;
-        highlightSpans: HighlightSpan[];
-    }
-    namespace HighlightSpanKind {
-        const none: string;
-        const definition: string;
-        const reference: string;
-        const writtenReference: string;
-    }
-    interface HighlightSpan {
-        fileName?: string;
-        textSpan: TextSpan;
-        kind: string;
-    }
-    interface NavigateToItem {
-        name: string;
-        kind: string;
-        kindModifiers: string;
-        matchKind: string;
-        isCaseSensitive: boolean;
-        fileName: string;
-        textSpan: TextSpan;
-        containerName: string;
-        containerKind: string;
-    }
-    interface EditorOptions {
-        IndentSize: number;
-        TabSize: number;
-        NewLineCharacter: string;
-        ConvertTabsToSpaces: boolean;
-        IndentStyle: IndentStyle;
-    }
-    enum IndentStyle {
-        None = 0,
-        Block = 1,
-        Smart = 2,
-    }
-    interface FormatCodeOptions extends EditorOptions {
-        InsertSpaceAfterCommaDelimiter: boolean;
-        InsertSpaceAfterSemicolonInForStatements: boolean;
-        InsertSpaceBeforeAndAfterBinaryOperators: boolean;
-        InsertSpaceAfterKeywordsInControlFlowStatements: boolean;
-        InsertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
-        InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
-        InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: boolean;
-        InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
-        PlaceOpenBraceOnNewLineForFunctions: boolean;
-        PlaceOpenBraceOnNewLineForControlBlocks: boolean;
-        [s: string]: boolean | number | string;
-    }
-    interface DefinitionInfo {
-        fileName: string;
-        textSpan: TextSpan;
-        kind: string;
-        name: string;
-        containerKind: string;
-        containerName: string;
-    }
-    interface ReferencedSymbol {
-        definition: DefinitionInfo;
-        references: ReferenceEntry[];
-    }
-    enum SymbolDisplayPartKind {
-        aliasName = 0,
-        className = 1,
-        enumName = 2,
-        fieldName = 3,
-        interfaceName = 4,
-        keyword = 5,
-        lineBreak = 6,
-        numericLiteral = 7,
-        stringLiteral = 8,
-        localName = 9,
-        methodName = 10,
-        moduleName = 11,
-        operator = 12,
-        parameterName = 13,
-        propertyName = 14,
-        punctuation = 15,
-        space = 16,
-        text = 17,
-        typeParameterName = 18,
-        enumMemberName = 19,
-        functionName = 20,
-        regularExpressionLiteral = 21,
-    }
-    interface SymbolDisplayPart {
-        text: string;
-        kind: string;
-    }
-    interface QuickInfo {
-        kind: string;
-        kindModifiers: string;
-        textSpan: TextSpan;
-        displayParts: SymbolDisplayPart[];
-        documentation: SymbolDisplayPart[];
-    }
-    interface RenameInfo {
-        canRename: boolean;
-        localizedErrorMessage: string;
-        displayName: string;
-        fullDisplayName: string;
-        kind: string;
-        kindModifiers: string;
-        triggerSpan: TextSpan;
-    }
-    interface SignatureHelpParameter {
-        name: string;
-        documentation: SymbolDisplayPart[];
-        displayParts: SymbolDisplayPart[];
-        isOptional: boolean;
-    }
-    /**
-     * Represents a single signature to show in signature help.
-     * The id is used for subsequent calls into the language service to ask questions about the
-     * signature help item in the context of any documents that have been updated.  i.e. after
-     * an edit has happened, while signature help is still active, the host can ask important
-     * questions like 'what parameter is the user currently contained within?'.
-     */
-    interface SignatureHelpItem {
-        isVariadic: boolean;
-        prefixDisplayParts: SymbolDisplayPart[];
-        suffixDisplayParts: SymbolDisplayPart[];
-        separatorDisplayParts: SymbolDisplayPart[];
-        parameters: SignatureHelpParameter[];
-        documentation: SymbolDisplayPart[];
-    }
-    /**
-     * Represents a set of signature help items, and the preferred item that should be selected.
-     */
-    interface SignatureHelpItems {
-        items: SignatureHelpItem[];
-        applicableSpan: TextSpan;
-        selectedItemIndex: number;
-        argumentIndex: number;
-        argumentCount: number;
-    }
-    interface CompletionInfo {
-        isMemberCompletion: boolean;
-        isNewIdentifierLocation: boolean;
-        entries: CompletionEntry[];
-    }
-    interface CompletionEntry {
-        name: string;
-        kind: string;
-        kindModifiers: string;
-        sortText: string;
-    }
-    interface CompletionEntryDetails {
-        name: string;
-        kind: string;
-        kindModifiers: string;
-        displayParts: SymbolDisplayPart[];
-        documentation: SymbolDisplayPart[];
-    }
-    interface OutliningSpan {
-        /** The span of the document to actually collapse. */
-        textSpan: TextSpan;
-        /** The span of the document to display when the user hovers over the collapsed span. */
-        hintSpan: TextSpan;
-        /** The text to display in the editor for the collapsed region. */
-        bannerText: string;
-        /**
-          * Whether or not this region should be automatically collapsed when
-          * the 'Collapse to Definitions' command is invoked.
-          */
-        autoCollapse: boolean;
-    }
-    interface EmitOutput {
-        outputFiles: OutputFile[];
-        emitSkipped: boolean;
-    }
-    enum OutputFileType {
-        JavaScript = 0,
-        SourceMap = 1,
-        Declaration = 2,
-    }
-    interface OutputFile {
-        name: string;
-        writeByteOrderMark: boolean;
-        text: string;
-    }
-    enum EndOfLineState {
-        None = 0,
-        InMultiLineCommentTrivia = 1,
-        InSingleQuoteStringLiteral = 2,
-        InDoubleQuoteStringLiteral = 3,
-        InTemplateHeadOrNoSubstitutionTemplate = 4,
-        InTemplateMiddleOrTail = 5,
-        InTemplateSubstitutionPosition = 6,
-    }
-    enum TokenClass {
-        Punctuation = 0,
-        Keyword = 1,
-        Operator = 2,
-        Comment = 3,
-        Whitespace = 4,
-        Identifier = 5,
-        NumberLiteral = 6,
-        StringLiteral = 7,
-        RegExpLiteral = 8,
-    }
-    interface ClassificationResult {
-        finalLexState: EndOfLineState;
-        entries: ClassificationInfo[];
-    }
-    interface ClassificationInfo {
-        length: number;
-        classification: TokenClass;
-    }
-    interface Classifier {
-        /**
-         * Gives lexical classifications of tokens on a line without any syntactic context.
-         * For instance, a token consisting of the text 'string' can be either an identifier
-         * named 'string' or the keyword 'string', however, because this classifier is not aware,
-         * it relies on certain heuristics to give acceptable results. For classifications where
-         * speed trumps accuracy, this function is preferable; however, for true accuracy, the
-         * syntactic classifier is ideal. In fact, in certain editing scenarios, combining the
-         * lexical, syntactic, and semantic classifiers may issue the best user experience.
-         *
-         * @param text                      The text of a line to classify.
-         * @param lexState                  The state of the lexical classifier at the end of the previous line.
-         * @param syntacticClassifierAbsent Whether the client is *not* using a syntactic classifier.
-         *                                  If there is no syntactic classifier (syntacticClassifierAbsent=true),
-         *                                  certain heuristics may be used in its place; however, if there is a
-         *                                  syntactic classifier (syntacticClassifierAbsent=false), certain
-         *                                  classifications which may be incorrectly categorized will be given
-         *                                  back as Identifiers in order to allow the syntactic classifier to
-         *                                  subsume the classification.
-         * @deprecated Use getLexicalClassifications instead.
-         */
-        getClassificationsForLine(text: string, lexState: EndOfLineState, syntacticClassifierAbsent: boolean): ClassificationResult;
-        getEncodedLexicalClassifications(text: string, endOfLineState: EndOfLineState, syntacticClassifierAbsent: boolean): Classifications;
-    }
-    /**
-      * The document registry represents a store of SourceFile objects that can be shared between
-      * multiple LanguageService instances. A LanguageService instance holds on the SourceFile (AST)
-      * of files in the context.
-      * SourceFile objects account for most of the memory usage by the language service. Sharing
-      * the same DocumentRegistry instance between different instances of LanguageService allow
-      * for more efficient memory utilization since all projects will share at least the library
-      * file (lib.d.ts).
-      *
-      * A more advanced use of the document registry is to serialize sourceFile objects to disk
-      * and re-hydrate them when needed.
-      *
-      * To create a default DocumentRegistry, use createDocumentRegistry to create one, and pass it
-      * to all subsequent createLanguageService calls.
-      */
-    interface DocumentRegistry {
-        /**
-          * Request a stored SourceFile with a given fileName and compilationSettings.
-          * The first call to acquire will call createLanguageServiceSourceFile to generate
-          * the SourceFile if was not found in the registry.
-          *
-          * @param fileName The name of the file requested
-          * @param compilationSettings Some compilation settings like target affects the
-          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
-          * multiple copies of the same file for different compilation settings.
-          * @parm scriptSnapshot Text of the file. Only used if the file was not found
-          * in the registry and a new one was created.
-          * @parm version Current version of the file. Only used if the file was not found
-          * in the registry and a new one was created.
-          */
-        acquireDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
-        acquireDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
-        /**
-          * Request an updated version of an already existing SourceFile with a given fileName
-          * and compilationSettings. The update will in-turn call updateLanguageServiceSourceFile
-          * to get an updated SourceFile.
-          *
-          * @param fileName The name of the file requested
-          * @param compilationSettings Some compilation settings like target affects the
-          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
-          * multiple copies of the same file for different compilation settings.
-          * @param scriptSnapshot Text of the file.
-          * @param version Current version of the file.
-          */
-        updateDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
-        updateDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
-        getKeyForCompilationSettings(settings: CompilerOptions): DocumentRegistryBucketKey;
-        /**
-          * Informs the DocumentRegistry that a file is not needed any longer.
-          *
-          * Note: It is not allowed to call release on a SourceFile that was not acquired from
-          * this registry originally.
-          *
-          * @param fileName The name of the file to be released
-          * @param compilationSettings The compilation settings used to acquire the file
-          */
-        releaseDocument(fileName: string, compilationSettings: CompilerOptions): void;
-        releaseDocumentWithKey(path: Path, key: DocumentRegistryBucketKey): void;
-        reportStats(): string;
-    }
-    type DocumentRegistryBucketKey = string & {
-        __bucketKey: any;
-    };
-    namespace ScriptElementKind {
-        const unknown: string;
-        const warning: string;
-        /** predefined type (void) or keyword (class) */
-        const keyword: string;
-        /** top level script node */
-        const scriptElement: string;
-        /** module foo {} */
-        const moduleElement: string;
-        /** class X {} */
-        const classElement: string;
-        /** var x = class X {} */
-        const localClassElement: string;
-        /** interface Y {} */
-        const interfaceElement: string;
-        /** type T = ... */
-        const typeElement: string;
-        /** enum E */
-        const enumElement: string;
-        /**
-         * Inside module and script only
-         * const v = ..
-         */
-        const variableElement: string;
-        /** Inside function */
-        const localVariableElement: string;
-        /**
-         * Inside module and script only
-         * function f() { }
-         */
-        const functionElement: string;
-        /** Inside function */
-        const localFunctionElement: string;
-        /** class X { [public|private]* foo() {} } */
-        const memberFunctionElement: string;
-        /** class X { [public|private]* [get|set] foo:number; } */
-        const memberGetAccessorElement: string;
-        const memberSetAccessorElement: string;
-        /**
-         * class X { [public|private]* foo:number; }
-         * interface Y { foo:number; }
-         */
-        const memberVariableElement: string;
-        /** class X { constructor() { } } */
-        const constructorImplementationElement: string;
-        /** interface Y { ():number; } */
-        const callSignatureElement: string;
-        /** interface Y { []:number; } */
-        const indexSignatureElement: string;
-        /** interface Y { new():Y; } */
-        const constructSignatureElement: string;
-        /** function foo(*Y*: string) */
-        const parameterElement: string;
-        const typeParameterElement: string;
-        const primitiveType: string;
-        const label: string;
-        const alias: string;
-        const constElement: string;
-        const letElement: string;
-    }
-    namespace ScriptElementKindModifier {
-        const none: string;
-        const publicMemberModifier: string;
-        const privateMemberModifier: string;
-        const protectedMemberModifier: string;
-        const exportedModifier: string;
-        const ambientModifier: string;
-        const staticModifier: string;
-        const abstractModifier: string;
-    }
-    class ClassificationTypeNames {
-        static comment: string;
-        static identifier: string;
-        static keyword: string;
-        static numericLiteral: string;
-        static operator: string;
-        static stringLiteral: string;
-        static whiteSpace: string;
-        static text: string;
-        static punctuation: string;
-        static className: string;
-        static enumName: string;
-        static interfaceName: string;
-        static moduleName: string;
-        static typeParameterName: string;
-        static typeAliasName: string;
-        static parameterName: string;
-        static docCommentTagName: string;
-        static jsxOpenTagName: string;
-        static jsxCloseTagName: string;
-        static jsxSelfClosingTagName: string;
-        static jsxAttribute: string;
-        static jsxText: string;
-        static jsxAttributeStringLiteralValue: string;
-    }
-    enum ClassificationType {
-        comment = 1,
-        identifier = 2,
-        keyword = 3,
-        numericLiteral = 4,
-        operator = 5,
-        stringLiteral = 6,
-        regularExpressionLiteral = 7,
-        whiteSpace = 8,
-        text = 9,
-        punctuation = 10,
-        className = 11,
-        enumName = 12,
-        interfaceName = 13,
-        moduleName = 14,
-        typeParameterName = 15,
-        typeAliasName = 16,
-        parameterName = 17,
-        docCommentTagName = 18,
-        jsxOpenTagName = 19,
-        jsxCloseTagName = 20,
-        jsxSelfClosingTagName = 21,
-        jsxAttribute = 22,
-        jsxText = 23,
-        jsxAttributeStringLiteralValue = 24,
-    }
-    interface DisplayPartsSymbolWriter extends SymbolWriter {
-        displayParts(): SymbolDisplayPart[];
-    }
-    function displayPartsToString(displayParts: SymbolDisplayPart[]): string;
-    function getDefaultCompilerOptions(): CompilerOptions;
-    interface TranspileOptions {
-        compilerOptions?: CompilerOptions;
-        fileName?: string;
-        reportDiagnostics?: boolean;
-        moduleName?: string;
-        renamedDependencies?: Map<string>;
-    }
-    interface TranspileOutput {
-        outputText: string;
-        diagnostics?: Diagnostic[];
-        sourceMapText?: string;
-    }
-    function transpileModule(input: string, transpileOptions: TranspileOptions): TranspileOutput;
-    function transpile(input: string, compilerOptions?: CompilerOptions, fileName?: string, diagnostics?: Diagnostic[], moduleName?: string): string;
-    function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTarget: ScriptTarget, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile;
-    let disableIncrementalParsing: boolean;
-    function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
-    function createDocumentRegistry(useCaseSensitiveFileNames?: boolean, currentDirectory?: string): DocumentRegistry;
-    function preProcessFile(sourceText: string, readImportFiles?: boolean, detectJavaScriptImports?: boolean): PreProcessedFileInfo;
-    function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry): LanguageService;
-    function createClassifier(): Classifier;
-    /**
-      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
-      * node package.
-      * The functionality is not supported if the ts module is consumed outside of a node module.
-      */
-    function getDefaultLibFilePath(options: CompilerOptions): string;
-}
+declare namespace ts {
+    interface Map<T> {
+        [index: string]: T;
+    }
+    type Path = string & {
+        __pathBrand: any;
+    };
+    interface FileMap<T> {
+        get(fileName: Path): T;
+        set(fileName: Path, value: T): void;
+        contains(fileName: Path): boolean;
+        remove(fileName: Path): void;
+        forEachValue(f: (key: Path, v: T) => void): void;
+        clear(): void;
+    }
+    interface TextRange {
+        pos: number;
+        end: number;
+    }
+    enum SyntaxKind {
+        Unknown = 0,
+        EndOfFileToken = 1,
+        SingleLineCommentTrivia = 2,
+        MultiLineCommentTrivia = 3,
+        NewLineTrivia = 4,
+        WhitespaceTrivia = 5,
+        ShebangTrivia = 6,
+        ConflictMarkerTrivia = 7,
+        NumericLiteral = 8,
+        StringLiteral = 9,
+        RegularExpressionLiteral = 10,
+        NoSubstitutionTemplateLiteral = 11,
+        TemplateHead = 12,
+        TemplateMiddle = 13,
+        TemplateTail = 14,
+        OpenBraceToken = 15,
+        CloseBraceToken = 16,
+        OpenParenToken = 17,
+        CloseParenToken = 18,
+        OpenBracketToken = 19,
+        CloseBracketToken = 20,
+        DotToken = 21,
+        DotDotDotToken = 22,
+        SemicolonToken = 23,
+        CommaToken = 24,
+        LessThanToken = 25,
+        LessThanSlashToken = 26,
+        GreaterThanToken = 27,
+        LessThanEqualsToken = 28,
+        GreaterThanEqualsToken = 29,
+        EqualsEqualsToken = 30,
+        ExclamationEqualsToken = 31,
+        EqualsEqualsEqualsToken = 32,
+        ExclamationEqualsEqualsToken = 33,
+        EqualsGreaterThanToken = 34,
+        PlusToken = 35,
+        MinusToken = 36,
+        AsteriskToken = 37,
+        AsteriskAsteriskToken = 38,
+        SlashToken = 39,
+        PercentToken = 40,
+        PlusPlusToken = 41,
+        MinusMinusToken = 42,
+        LessThanLessThanToken = 43,
+        GreaterThanGreaterThanToken = 44,
+        GreaterThanGreaterThanGreaterThanToken = 45,
+        AmpersandToken = 46,
+        BarToken = 47,
+        CaretToken = 48,
+        ExclamationToken = 49,
+        TildeToken = 50,
+        AmpersandAmpersandToken = 51,
+        BarBarToken = 52,
+        QuestionToken = 53,
+        ColonToken = 54,
+        AtToken = 55,
+        EqualsToken = 56,
+        PlusEqualsToken = 57,
+        MinusEqualsToken = 58,
+        AsteriskEqualsToken = 59,
+        AsteriskAsteriskEqualsToken = 60,
+        SlashEqualsToken = 61,
+        PercentEqualsToken = 62,
+        LessThanLessThanEqualsToken = 63,
+        GreaterThanGreaterThanEqualsToken = 64,
+        GreaterThanGreaterThanGreaterThanEqualsToken = 65,
+        AmpersandEqualsToken = 66,
+        BarEqualsToken = 67,
+        CaretEqualsToken = 68,
+        Identifier = 69,
+        BreakKeyword = 70,
+        CaseKeyword = 71,
+        CatchKeyword = 72,
+        ClassKeyword = 73,
+        ConstKeyword = 74,
+        ContinueKeyword = 75,
+        DebuggerKeyword = 76,
+        DefaultKeyword = 77,
+        DeleteKeyword = 78,
+        DoKeyword = 79,
+        ElseKeyword = 80,
+        EnumKeyword = 81,
+        ExportKeyword = 82,
+        ExtendsKeyword = 83,
+        FalseKeyword = 84,
+        FinallyKeyword = 85,
+        ForKeyword = 86,
+        FunctionKeyword = 87,
+        IfKeyword = 88,
+        ImportKeyword = 89,
+        InKeyword = 90,
+        InstanceOfKeyword = 91,
+        NewKeyword = 92,
+        NullKeyword = 93,
+        ReturnKeyword = 94,
+        SuperKeyword = 95,
+        SwitchKeyword = 96,
+        ThisKeyword = 97,
+        ThrowKeyword = 98,
+        TrueKeyword = 99,
+        TryKeyword = 100,
+        TypeOfKeyword = 101,
+        VarKeyword = 102,
+        VoidKeyword = 103,
+        WhileKeyword = 104,
+        WithKeyword = 105,
+        ImplementsKeyword = 106,
+        InterfaceKeyword = 107,
+        LetKeyword = 108,
+        PackageKeyword = 109,
+        PrivateKeyword = 110,
+        ProtectedKeyword = 111,
+        PublicKeyword = 112,
+        StaticKeyword = 113,
+        YieldKeyword = 114,
+        AbstractKeyword = 115,
+        AsKeyword = 116,
+        AnyKeyword = 117,
+        AsyncKeyword = 118,
+        AwaitKeyword = 119,
+        BooleanKeyword = 120,
+        ConstructorKeyword = 121,
+        DeclareKeyword = 122,
+        GetKeyword = 123,
+        IsKeyword = 124,
+        ModuleKeyword = 125,
+        NamespaceKeyword = 126,
+        NeverKeyword = 127,
+        ReadonlyKeyword = 128,
+        RequireKeyword = 129,
+        NumberKeyword = 130,
+        SetKeyword = 131,
+        StringKeyword = 132,
+        SymbolKeyword = 133,
+        TypeKeyword = 134,
+        UndefinedKeyword = 135,
+        FromKeyword = 136,
+        GlobalKeyword = 137,
+        OfKeyword = 138,
+        QualifiedName = 139,
+        ComputedPropertyName = 140,
+        TypeParameter = 141,
+        Parameter = 142,
+        Decorator = 143,
+        PropertySignature = 144,
+        PropertyDeclaration = 145,
+        MethodSignature = 146,
+        MethodDeclaration = 147,
+        Constructor = 148,
+        GetAccessor = 149,
+        SetAccessor = 150,
+        CallSignature = 151,
+        ConstructSignature = 152,
+        IndexSignature = 153,
+        TypePredicate = 154,
+        TypeReference = 155,
+        FunctionType = 156,
+        ConstructorType = 157,
+        TypeQuery = 158,
+        TypeLiteral = 159,
+        ArrayType = 160,
+        TupleType = 161,
+        UnionType = 162,
+        IntersectionType = 163,
+        ParenthesizedType = 164,
+        ThisType = 165,
+        StringLiteralType = 166,
+        ObjectBindingPattern = 167,
+        ArrayBindingPattern = 168,
+        BindingElement = 169,
+        ArrayLiteralExpression = 170,
+        ObjectLiteralExpression = 171,
+        PropertyAccessExpression = 172,
+        ElementAccessExpression = 173,
+        CallExpression = 174,
+        NewExpression = 175,
+        TaggedTemplateExpression = 176,
+        TypeAssertionExpression = 177,
+        ParenthesizedExpression = 178,
+        FunctionExpression = 179,
+        ArrowFunction = 180,
+        DeleteExpression = 181,
+        TypeOfExpression = 182,
+        VoidExpression = 183,
+        AwaitExpression = 184,
+        PrefixUnaryExpression = 185,
+        PostfixUnaryExpression = 186,
+        BinaryExpression = 187,
+        ConditionalExpression = 188,
+        TemplateExpression = 189,
+        YieldExpression = 190,
+        SpreadElementExpression = 191,
+        ClassExpression = 192,
+        OmittedExpression = 193,
+        ExpressionWithTypeArguments = 194,
+        AsExpression = 195,
+        NonNullExpression = 196,
+        TemplateSpan = 197,
+        SemicolonClassElement = 198,
+        Block = 199,
+        VariableStatement = 200,
+        EmptyStatement = 201,
+        ExpressionStatement = 202,
+        IfStatement = 203,
+        DoStatement = 204,
+        WhileStatement = 205,
+        ForStatement = 206,
+        ForInStatement = 207,
+        ForOfStatement = 208,
+        ContinueStatement = 209,
+        BreakStatement = 210,
+        ReturnStatement = 211,
+        WithStatement = 212,
+        SwitchStatement = 213,
+        LabeledStatement = 214,
+        ThrowStatement = 215,
+        TryStatement = 216,
+        DebuggerStatement = 217,
+        VariableDeclaration = 218,
+        VariableDeclarationList = 219,
+        FunctionDeclaration = 220,
+        ClassDeclaration = 221,
+        InterfaceDeclaration = 222,
+        TypeAliasDeclaration = 223,
+        EnumDeclaration = 224,
+        ModuleDeclaration = 225,
+        ModuleBlock = 226,
+        CaseBlock = 227,
+        NamespaceExportDeclaration = 228,
+        ImportEqualsDeclaration = 229,
+        ImportDeclaration = 230,
+        ImportClause = 231,
+        NamespaceImport = 232,
+        NamedImports = 233,
+        ImportSpecifier = 234,
+        ExportAssignment = 235,
+        ExportDeclaration = 236,
+        NamedExports = 237,
+        ExportSpecifier = 238,
+        MissingDeclaration = 239,
+        ExternalModuleReference = 240,
+        JsxElement = 241,
+        JsxSelfClosingElement = 242,
+        JsxOpeningElement = 243,
+        JsxText = 244,
+        JsxClosingElement = 245,
+        JsxAttribute = 246,
+        JsxSpreadAttribute = 247,
+        JsxExpression = 248,
+        CaseClause = 249,
+        DefaultClause = 250,
+        HeritageClause = 251,
+        CatchClause = 252,
+        PropertyAssignment = 253,
+        ShorthandPropertyAssignment = 254,
+        EnumMember = 255,
+        SourceFile = 256,
+        JSDocTypeExpression = 257,
+        JSDocAllType = 258,
+        JSDocUnknownType = 259,
+        JSDocArrayType = 260,
+        JSDocUnionType = 261,
+        JSDocTupleType = 262,
+        JSDocNullableType = 263,
+        JSDocNonNullableType = 264,
+        JSDocRecordType = 265,
+        JSDocRecordMember = 266,
+        JSDocTypeReference = 267,
+        JSDocOptionalType = 268,
+        JSDocFunctionType = 269,
+        JSDocVariadicType = 270,
+        JSDocConstructorType = 271,
+        JSDocThisType = 272,
+        JSDocComment = 273,
+        JSDocTag = 274,
+        JSDocParameterTag = 275,
+        JSDocReturnTag = 276,
+        JSDocTypeTag = 277,
+        JSDocTemplateTag = 278,
+        JSDocTypedefTag = 279,
+        JSDocPropertyTag = 280,
+        JSDocTypeLiteral = 281,
+        SyntaxList = 282,
+        Count = 283,
+        FirstAssignment = 56,
+        LastAssignment = 68,
+        FirstReservedWord = 70,
+        LastReservedWord = 105,
+        FirstKeyword = 70,
+        LastKeyword = 138,
+        FirstFutureReservedWord = 106,
+        LastFutureReservedWord = 114,
+        FirstTypeNode = 154,
+        LastTypeNode = 166,
+        FirstPunctuation = 15,
+        LastPunctuation = 68,
+        FirstToken = 0,
+        LastToken = 138,
+        FirstTriviaToken = 2,
+        LastTriviaToken = 7,
+        FirstLiteralToken = 8,
+        LastLiteralToken = 11,
+        FirstTemplateToken = 11,
+        LastTemplateToken = 14,
+        FirstBinaryOperator = 25,
+        LastBinaryOperator = 68,
+        FirstNode = 139,
+        FirstJSDocNode = 257,
+        LastJSDocNode = 281,
+        FirstJSDocTagNode = 273,
+        LastJSDocTagNode = 281,
+    }
+    enum NodeFlags {
+        None = 0,
+        Export = 1,
+        Ambient = 2,
+        Public = 4,
+        Private = 8,
+        Protected = 16,
+        Static = 32,
+        Readonly = 64,
+        Abstract = 128,
+        Async = 256,
+        Default = 512,
+        Let = 1024,
+        Const = 2048,
+        Namespace = 4096,
+        ExportContext = 8192,
+        ContainsThis = 16384,
+        HasImplicitReturn = 32768,
+        HasExplicitReturn = 65536,
+        GlobalAugmentation = 131072,
+        HasClassExtends = 262144,
+        HasDecorators = 524288,
+        HasParamDecorators = 1048576,
+        HasAsyncFunctions = 2097152,
+        DisallowInContext = 4194304,
+        YieldContext = 8388608,
+        DecoratorContext = 16777216,
+        AwaitContext = 33554432,
+        ThisNodeHasError = 67108864,
+        JavaScriptFile = 134217728,
+        ThisNodeOrAnySubNodesHasError = 268435456,
+        HasAggregatedChildData = 536870912,
+        HasJsxSpreadAttribute = 1073741824,
+        Modifier = 1023,
+        AccessibilityModifier = 28,
+        ParameterPropertyModifier = 92,
+        BlockScoped = 3072,
+        ReachabilityCheckFlags = 98304,
+        EmitHelperFlags = 3932160,
+        ReachabilityAndEmitFlags = 4030464,
+        ContextFlags = 197132288,
+        TypeExcludesFlags = 41943040,
+    }
+    enum JsxFlags {
+        None = 0,
+        /** An element from a named property of the JSX.IntrinsicElements interface */
+        IntrinsicNamedElement = 1,
+        /** An element inferred from the string index signature of the JSX.IntrinsicElements interface */
+        IntrinsicIndexedElement = 2,
+        IntrinsicElement = 3,
+    }
+    interface Node extends TextRange {
+        kind: SyntaxKind;
+        flags: NodeFlags;
+        decorators?: NodeArray<Decorator>;
+        modifiers?: ModifiersArray;
+        parent?: Node;
+    }
+    interface NodeArray<T> extends Array<T>, TextRange {
+        hasTrailingComma?: boolean;
+    }
+    interface ModifiersArray extends NodeArray<Modifier> {
+        flags: number;
+    }
+    interface Modifier extends Node {
+    }
+    interface Identifier extends PrimaryExpression {
+        text: string;
+        originalKeywordKind?: SyntaxKind;
+    }
+    interface QualifiedName extends Node {
+        left: EntityName;
+        right: Identifier;
+    }
+    type EntityName = Identifier | QualifiedName;
+    type PropertyName = Identifier | LiteralExpression | ComputedPropertyName;
+    type DeclarationName = Identifier | LiteralExpression | ComputedPropertyName | BindingPattern;
+    interface Declaration extends Node {
+        _declarationBrand: any;
+        name?: DeclarationName;
+    }
+    interface DeclarationStatement extends Declaration, Statement {
+        name?: Identifier;
+    }
+    interface ComputedPropertyName extends Node {
+        expression: Expression;
+    }
+    interface Decorator extends Node {
+        expression: LeftHandSideExpression;
+    }
+    interface TypeParameterDeclaration extends Declaration {
+        name: Identifier;
+        constraint?: TypeNode;
+        expression?: Expression;
+    }
+    interface SignatureDeclaration extends Declaration {
+        name?: PropertyName;
+        typeParameters?: NodeArray<TypeParameterDeclaration>;
+        parameters: NodeArray<ParameterDeclaration>;
+        type?: TypeNode;
+    }
+    interface CallSignatureDeclaration extends SignatureDeclaration, TypeElement {
+    }
+    interface ConstructSignatureDeclaration extends SignatureDeclaration, TypeElement {
+    }
+    interface VariableDeclaration extends Declaration {
+        parent?: VariableDeclarationList;
+        name: Identifier | BindingPattern;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface VariableDeclarationList extends Node {
+        declarations: NodeArray<VariableDeclaration>;
+    }
+    interface ParameterDeclaration extends Declaration {
+        dotDotDotToken?: Node;
+        name: Identifier | BindingPattern;
+        questionToken?: Node;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface BindingElement extends Declaration {
+        propertyName?: PropertyName;
+        dotDotDotToken?: Node;
+        name: Identifier | BindingPattern;
+        initializer?: Expression;
+    }
+    interface PropertySignature extends TypeElement {
+        name: PropertyName;
+        questionToken?: Node;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface PropertyDeclaration extends ClassElement {
+        questionToken?: Node;
+        name: PropertyName;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface ObjectLiteralElement extends Declaration {
+        _objectLiteralBrandBrand: any;
+        name?: PropertyName;
+    }
+    interface PropertyAssignment extends ObjectLiteralElement {
+        _propertyAssignmentBrand: any;
+        name: PropertyName;
+        questionToken?: Node;
+        initializer: Expression;
+    }
+    interface ShorthandPropertyAssignment extends ObjectLiteralElement {
+        name: Identifier;
+        questionToken?: Node;
+        equalsToken?: Node;
+        objectAssignmentInitializer?: Expression;
+    }
+    interface VariableLikeDeclaration extends Declaration {
+        propertyName?: PropertyName;
+        dotDotDotToken?: Node;
+        name: DeclarationName;
+        questionToken?: Node;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface PropertyLikeDeclaration extends Declaration {
+        name: PropertyName;
+    }
+    interface BindingPattern extends Node {
+        elements: NodeArray<BindingElement>;
+    }
+    interface ObjectBindingPattern extends BindingPattern {
+    }
+    interface ArrayBindingPattern extends BindingPattern {
+    }
+    /**
+     * Several node kinds share function-like features such as a signature,
+     * a name, and a body. These nodes should extend FunctionLikeDeclaration.
+     * Examples:
+     * - FunctionDeclaration
+     * - MethodDeclaration
+     * - AccessorDeclaration
+     */
+    interface FunctionLikeDeclaration extends SignatureDeclaration {
+        _functionLikeDeclarationBrand: any;
+        asteriskToken?: Node;
+        questionToken?: Node;
+        body?: Block | Expression;
+    }
+    interface FunctionDeclaration extends FunctionLikeDeclaration, DeclarationStatement {
+        name?: Identifier;
+        body?: FunctionBody;
+    }
+    interface MethodSignature extends SignatureDeclaration, TypeElement {
+        name: PropertyName;
+    }
+    interface MethodDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        name: PropertyName;
+        body?: FunctionBody;
+    }
+    interface ConstructorDeclaration extends FunctionLikeDeclaration, ClassElement {
+        body?: FunctionBody;
+    }
+    interface SemicolonClassElement extends ClassElement {
+        _semicolonClassElementBrand: any;
+    }
+    interface AccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        _accessorDeclarationBrand: any;
+        name: PropertyName;
+        body: FunctionBody;
+    }
+    interface GetAccessorDeclaration extends AccessorDeclaration {
+    }
+    interface SetAccessorDeclaration extends AccessorDeclaration {
+    }
+    interface IndexSignatureDeclaration extends SignatureDeclaration, ClassElement, TypeElement {
+        _indexSignatureDeclarationBrand: any;
+    }
+    interface TypeNode extends Node {
+        _typeNodeBrand: any;
+    }
+    interface ThisTypeNode extends TypeNode {
+        _thisTypeNodeBrand: any;
+    }
+    interface FunctionOrConstructorTypeNode extends TypeNode, SignatureDeclaration {
+        _functionOrConstructorTypeNodeBrand: any;
+    }
+    interface FunctionTypeNode extends FunctionOrConstructorTypeNode {
+    }
+    interface ConstructorTypeNode extends FunctionOrConstructorTypeNode {
+    }
+    interface TypeReferenceNode extends TypeNode {
+        typeName: EntityName;
+        typeArguments?: NodeArray<TypeNode>;
+    }
+    interface TypePredicateNode extends TypeNode {
+        parameterName: Identifier | ThisTypeNode;
+        type: TypeNode;
+    }
+    interface TypeQueryNode extends TypeNode {
+        exprName: EntityName;
+    }
+    interface TypeLiteralNode extends TypeNode, Declaration {
+        members: NodeArray<TypeElement>;
+    }
+    interface ArrayTypeNode extends TypeNode {
+        elementType: TypeNode;
+    }
+    interface TupleTypeNode extends TypeNode {
+        elementTypes: NodeArray<TypeNode>;
+    }
+    interface UnionOrIntersectionTypeNode extends TypeNode {
+        types: NodeArray<TypeNode>;
+    }
+    interface UnionTypeNode extends UnionOrIntersectionTypeNode {
+    }
+    interface IntersectionTypeNode extends UnionOrIntersectionTypeNode {
+    }
+    interface ParenthesizedTypeNode extends TypeNode {
+        type: TypeNode;
+    }
+    interface StringLiteralTypeNode extends LiteralLikeNode, TypeNode {
+        _stringLiteralTypeBrand: any;
+    }
+    interface StringLiteral extends LiteralExpression {
+        _stringLiteralBrand: any;
+    }
+    interface Expression extends Node {
+        _expressionBrand: any;
+        contextualType?: Type;
+    }
+    interface OmittedExpression extends Expression {
+    }
+    interface UnaryExpression extends Expression {
+        _unaryExpressionBrand: any;
+    }
+    interface IncrementExpression extends UnaryExpression {
+        _incrementExpressionBrand: any;
+    }
+    interface PrefixUnaryExpression extends IncrementExpression {
+        operator: SyntaxKind;
+        operand: UnaryExpression;
+    }
+    interface PostfixUnaryExpression extends IncrementExpression {
+        operand: LeftHandSideExpression;
+        operator: SyntaxKind;
+    }
+    interface PostfixExpression extends UnaryExpression {
+        _postfixExpressionBrand: any;
+    }
+    interface LeftHandSideExpression extends IncrementExpression {
+        _leftHandSideExpressionBrand: any;
+    }
+    interface MemberExpression extends LeftHandSideExpression {
+        _memberExpressionBrand: any;
+    }
+    interface PrimaryExpression extends MemberExpression {
+        _primaryExpressionBrand: any;
+    }
+    interface DeleteExpression extends UnaryExpression {
+        expression: UnaryExpression;
+    }
+    interface TypeOfExpression extends UnaryExpression {
+        expression: UnaryExpression;
+    }
+    interface VoidExpression extends UnaryExpression {
+        expression: UnaryExpression;
+    }
+    interface AwaitExpression extends UnaryExpression {
+        expression: UnaryExpression;
+    }
+    interface YieldExpression extends Expression {
+        asteriskToken?: Node;
+        expression?: Expression;
+    }
+    interface BinaryExpression extends Expression, Declaration {
+        left: Expression;
+        operatorToken: Node;
+        right: Expression;
+    }
+    interface ConditionalExpression extends Expression {
+        condition: Expression;
+        questionToken: Node;
+        whenTrue: Expression;
+        colonToken: Node;
+        whenFalse: Expression;
+    }
+    type FunctionBody = Block;
+    type ConciseBody = FunctionBody | Expression;
+    interface FunctionExpression extends PrimaryExpression, FunctionLikeDeclaration {
+        name?: Identifier;
+        body: FunctionBody;
+    }
+    interface ArrowFunction extends Expression, FunctionLikeDeclaration {
+        equalsGreaterThanToken: Node;
+        body: ConciseBody;
+    }
+    interface LiteralLikeNode extends Node {
+        text: string;
+        isUnterminated?: boolean;
+        hasExtendedUnicodeEscape?: boolean;
+    }
+    interface LiteralExpression extends LiteralLikeNode, PrimaryExpression {
+        _literalExpressionBrand: any;
+    }
+    interface TemplateLiteralFragment extends LiteralLikeNode {
+        _templateLiteralFragmentBrand: any;
+    }
+    interface TemplateExpression extends PrimaryExpression {
+        head: TemplateLiteralFragment;
+        templateSpans: NodeArray<TemplateSpan>;
+    }
+    interface TemplateSpan extends Node {
+        expression: Expression;
+        literal: TemplateLiteralFragment;
+    }
+    interface ParenthesizedExpression extends PrimaryExpression {
+        expression: Expression;
+    }
+    interface ArrayLiteralExpression extends PrimaryExpression {
+        elements: NodeArray<Expression>;
+    }
+    interface SpreadElementExpression extends Expression {
+        expression: Expression;
+    }
+    interface ObjectLiteralExpression extends PrimaryExpression, Declaration {
+        properties: NodeArray<ObjectLiteralElement>;
+    }
+    interface PropertyAccessExpression extends MemberExpression, Declaration {
+        expression: LeftHandSideExpression;
+        dotToken: Node;
+        name: Identifier;
+    }
+    type IdentifierOrPropertyAccess = Identifier | PropertyAccessExpression;
+    interface ElementAccessExpression extends MemberExpression {
+        expression: LeftHandSideExpression;
+        argumentExpression?: Expression;
+    }
+    interface CallExpression extends LeftHandSideExpression, Declaration {
+        expression: LeftHandSideExpression;
+        typeArguments?: NodeArray<TypeNode>;
+        arguments: NodeArray<Expression>;
+    }
+    interface ExpressionWithTypeArguments extends TypeNode {
+        expression: LeftHandSideExpression;
+        typeArguments?: NodeArray<TypeNode>;
+    }
+    interface NewExpression extends CallExpression, PrimaryExpression {
+    }
+    interface TaggedTemplateExpression extends MemberExpression {
+        tag: LeftHandSideExpression;
+        template: LiteralExpression | TemplateExpression;
+    }
+    type CallLikeExpression = CallExpression | NewExpression | TaggedTemplateExpression | Decorator;
+    interface AsExpression extends Expression {
+        expression: Expression;
+        type: TypeNode;
+    }
+    interface TypeAssertion extends UnaryExpression {
+        type: TypeNode;
+        expression: UnaryExpression;
+    }
+    type AssertionExpression = TypeAssertion | AsExpression;
+    interface NonNullExpression extends LeftHandSideExpression {
+        expression: Expression;
+    }
+    interface JsxElement extends PrimaryExpression {
+        openingElement: JsxOpeningElement;
+        children: NodeArray<JsxChild>;
+        closingElement: JsxClosingElement;
+    }
+    interface JsxOpeningElement extends Expression {
+        _openingElementBrand?: any;
+        tagName: EntityName;
+        attributes: NodeArray<JsxAttribute | JsxSpreadAttribute>;
+    }
+    interface JsxSelfClosingElement extends PrimaryExpression, JsxOpeningElement {
+        _selfClosingElementBrand?: any;
+    }
+    type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
+    interface JsxAttribute extends Node {
+        name: Identifier;
+        initializer?: Expression;
+    }
+    interface JsxSpreadAttribute extends Node {
+        expression: Expression;
+    }
+    interface JsxClosingElement extends Node {
+        tagName: EntityName;
+    }
+    interface JsxExpression extends Expression {
+        expression?: Expression;
+    }
+    interface JsxText extends Node {
+        _jsxTextExpressionBrand: any;
+    }
+    type JsxChild = JsxText | JsxExpression | JsxElement | JsxSelfClosingElement;
+    interface Statement extends Node {
+        _statementBrand: any;
+    }
+    interface EmptyStatement extends Statement {
+    }
+    interface DebuggerStatement extends Statement {
+    }
+    interface MissingDeclaration extends DeclarationStatement, ClassElement, ObjectLiteralElement, TypeElement {
+        name?: Identifier;
+    }
+    type BlockLike = SourceFile | Block | ModuleBlock | CaseClause;
+    interface Block extends Statement {
+        statements: NodeArray<Statement>;
+    }
+    interface VariableStatement extends Statement {
+        declarationList: VariableDeclarationList;
+    }
+    interface ExpressionStatement extends Statement {
+        expression: Expression;
+    }
+    interface IfStatement extends Statement {
+        expression: Expression;
+        thenStatement: Statement;
+        elseStatement?: Statement;
+    }
+    interface IterationStatement extends Statement {
+        statement: Statement;
+    }
+    interface DoStatement extends IterationStatement {
+        expression: Expression;
+    }
+    interface WhileStatement extends IterationStatement {
+        expression: Expression;
+    }
+    interface ForStatement extends IterationStatement {
+        initializer?: VariableDeclarationList | Expression;
+        condition?: Expression;
+        incrementor?: Expression;
+    }
+    interface ForInStatement extends IterationStatement {
+        initializer: VariableDeclarationList | Expression;
+        expression: Expression;
+    }
+    interface ForOfStatement extends IterationStatement {
+        initializer: VariableDeclarationList | Expression;
+        expression: Expression;
+    }
+    interface BreakStatement extends Statement {
+        label?: Identifier;
+    }
+    interface ContinueStatement extends Statement {
+        label?: Identifier;
+    }
+    type BreakOrContinueStatement = BreakStatement | ContinueStatement;
+    interface ReturnStatement extends Statement {
+        expression?: Expression;
+    }
+    interface WithStatement extends Statement {
+        expression: Expression;
+        statement: Statement;
+    }
+    interface SwitchStatement extends Statement {
+        expression: Expression;
+        caseBlock: CaseBlock;
+    }
+    interface CaseBlock extends Node {
+        clauses: NodeArray<CaseOrDefaultClause>;
+    }
+    interface CaseClause extends Node {
+        expression: Expression;
+        statements: NodeArray<Statement>;
+    }
+    interface DefaultClause extends Node {
+        statements: NodeArray<Statement>;
+    }
+    type CaseOrDefaultClause = CaseClause | DefaultClause;
+    interface LabeledStatement extends Statement {
+        label: Identifier;
+        statement: Statement;
+    }
+    interface ThrowStatement extends Statement {
+        expression: Expression;
+    }
+    interface TryStatement extends Statement {
+        tryBlock: Block;
+        catchClause?: CatchClause;
+        finallyBlock?: Block;
+    }
+    interface CatchClause extends Node {
+        variableDeclaration: VariableDeclaration;
+        block: Block;
+    }
+    type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration;
+    interface ClassLikeDeclaration extends Declaration {
+        name?: Identifier;
+        typeParameters?: NodeArray<TypeParameterDeclaration>;
+        heritageClauses?: NodeArray<HeritageClause>;
+        members: NodeArray<ClassElement>;
+    }
+    interface ClassDeclaration extends ClassLikeDeclaration, DeclarationStatement {
+        name?: Identifier;
+    }
+    interface ClassExpression extends ClassLikeDeclaration, PrimaryExpression {
+    }
+    interface ClassElement extends Declaration {
+        _classElementBrand: any;
+        name?: PropertyName;
+    }
+    interface TypeElement extends Declaration {
+        _typeElementBrand: any;
+        name?: PropertyName;
+        questionToken?: Node;
+    }
+    interface InterfaceDeclaration extends DeclarationStatement {
+        name: Identifier;
+        typeParameters?: NodeArray<TypeParameterDeclaration>;
+        heritageClauses?: NodeArray<HeritageClause>;
+        members: NodeArray<TypeElement>;
+    }
+    interface HeritageClause extends Node {
+        token: SyntaxKind;
+        types?: NodeArray<ExpressionWithTypeArguments>;
+    }
+    interface TypeAliasDeclaration extends DeclarationStatement {
+        name: Identifier;
+        typeParameters?: NodeArray<TypeParameterDeclaration>;
+        type: TypeNode;
+    }
+    interface EnumMember extends Declaration {
+        name: DeclarationName;
+        initializer?: Expression;
+    }
+    interface EnumDeclaration extends DeclarationStatement {
+        name: Identifier;
+        members: NodeArray<EnumMember>;
+    }
+    type ModuleBody = ModuleBlock | ModuleDeclaration;
+    interface ModuleDeclaration extends DeclarationStatement {
+        name: Identifier | LiteralExpression;
+        body: ModuleBlock | ModuleDeclaration;
+    }
+    interface ModuleBlock extends Node, Statement {
+        statements: NodeArray<Statement>;
+    }
+    interface ImportEqualsDeclaration extends DeclarationStatement {
+        name: Identifier;
+        moduleReference: EntityName | ExternalModuleReference;
+    }
+    interface ExternalModuleReference extends Node {
+        expression?: Expression;
+    }
+    interface ImportDeclaration extends Statement {
+        importClause?: ImportClause;
+        moduleSpecifier: Expression;
+    }
+    interface ImportClause extends Declaration {
+        name?: Identifier;
+        namedBindings?: NamespaceImport | NamedImports;
+    }
+    interface NamespaceImport extends Declaration {
+        name: Identifier;
+    }
+    interface NamespaceExportDeclaration extends DeclarationStatement {
+        name: Identifier;
+        moduleReference: LiteralLikeNode;
+    }
+    interface ExportDeclaration extends DeclarationStatement {
+        exportClause?: NamedExports;
+        moduleSpecifier?: Expression;
+    }
+    interface NamedImports extends Node {
+        elements: NodeArray<ImportSpecifier>;
+    }
+    interface NamedExports extends Node {
+        elements: NodeArray<ExportSpecifier>;
+    }
+    type NamedImportsOrExports = NamedImports | NamedExports;
+    interface ImportSpecifier extends Declaration {
+        propertyName?: Identifier;
+        name: Identifier;
+    }
+    interface ExportSpecifier extends Declaration {
+        propertyName?: Identifier;
+        name: Identifier;
+    }
+    type ImportOrExportSpecifier = ImportSpecifier | ExportSpecifier;
+    interface ExportAssignment extends DeclarationStatement {
+        isExportEquals?: boolean;
+        expression: Expression;
+    }
+    interface FileReference extends TextRange {
+        fileName: string;
+    }
+    interface CommentRange extends TextRange {
+        hasTrailingNewLine?: boolean;
+        kind: SyntaxKind;
+    }
+    interface JSDocTypeExpression extends Node {
+        type: JSDocType;
+    }
+    interface JSDocType extends TypeNode {
+        _jsDocTypeBrand: any;
+    }
+    interface JSDocAllType extends JSDocType {
+        _JSDocAllTypeBrand: any;
+    }
+    interface JSDocUnknownType extends JSDocType {
+        _JSDocUnknownTypeBrand: any;
+    }
+    interface JSDocArrayType extends JSDocType {
+        elementType: JSDocType;
+    }
+    interface JSDocUnionType extends JSDocType {
+        types: NodeArray<JSDocType>;
+    }
+    interface JSDocTupleType extends JSDocType {
+        types: NodeArray<JSDocType>;
+    }
+    interface JSDocNonNullableType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocNullableType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocRecordType extends JSDocType, TypeLiteralNode {
+        members: NodeArray<JSDocRecordMember>;
+    }
+    interface JSDocTypeReference extends JSDocType {
+        name: EntityName;
+        typeArguments: NodeArray<JSDocType>;
+    }
+    interface JSDocOptionalType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocFunctionType extends JSDocType, SignatureDeclaration {
+        parameters: NodeArray<ParameterDeclaration>;
+        type: JSDocType;
+    }
+    interface JSDocVariadicType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocConstructorType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocThisType extends JSDocType {
+        type: JSDocType;
+    }
+    type JSDocTypeReferencingNode = JSDocThisType | JSDocConstructorType | JSDocVariadicType | JSDocOptionalType | JSDocNullableType | JSDocNonNullableType;
+    interface JSDocRecordMember extends PropertySignature {
+        name: Identifier | LiteralExpression;
+        type?: JSDocType;
+    }
+    interface JSDocComment extends Node {
+        tags: NodeArray<JSDocTag>;
+    }
+    interface JSDocTag extends Node {
+        atToken: Node;
+        tagName: Identifier;
+    }
+    interface JSDocTemplateTag extends JSDocTag {
+        typeParameters: NodeArray<TypeParameterDeclaration>;
+    }
+    interface JSDocReturnTag extends JSDocTag {
+        typeExpression: JSDocTypeExpression;
+    }
+    interface JSDocTypeTag extends JSDocTag {
+        typeExpression: JSDocTypeExpression;
+    }
+    interface JSDocTypedefTag extends JSDocTag, Declaration {
+        name?: Identifier;
+        typeExpression?: JSDocTypeExpression;
+        jsDocTypeLiteral?: JSDocTypeLiteral;
+    }
+    interface JSDocPropertyTag extends JSDocTag, TypeElement {
+        name: Identifier;
+        typeExpression: JSDocTypeExpression;
+    }
+    interface JSDocTypeLiteral extends JSDocType {
+        jsDocPropertyTags?: NodeArray<JSDocPropertyTag>;
+        jsDocTypeTag?: JSDocTypeTag;
+    }
+    interface JSDocParameterTag extends JSDocTag {
+        preParameterName?: Identifier;
+        typeExpression?: JSDocTypeExpression;
+        postParameterName?: Identifier;
+        isBracketed: boolean;
+    }
+    enum FlowFlags {
+        Unreachable = 1,
+        Start = 2,
+        BranchLabel = 4,
+        LoopLabel = 8,
+        Assignment = 16,
+        TrueCondition = 32,
+        FalseCondition = 64,
+        Referenced = 128,
+        Shared = 256,
+        Label = 12,
+        Condition = 96,
+    }
+    interface FlowNode {
+        flags: FlowFlags;
+        id?: number;
+    }
+    interface FlowStart extends FlowNode {
+        container?: FunctionExpression | ArrowFunction;
+    }
+    interface FlowLabel extends FlowNode {
+        antecedents: FlowNode[];
+    }
+    interface FlowAssignment extends FlowNode {
+        node: Expression | VariableDeclaration | BindingElement;
+        antecedent: FlowNode;
+    }
+    interface FlowCondition extends FlowNode {
+        expression: Expression;
+        antecedent: FlowNode;
+    }
+    interface AmdDependency {
+        path: string;
+        name: string;
+    }
+    interface SourceFile extends Declaration {
+        statements: NodeArray<Statement>;
+        endOfFileToken: Node;
+        fileName: string;
+        path: Path;
+        text: string;
+        amdDependencies: AmdDependency[];
+        moduleName: string;
+        referencedFiles: FileReference[];
+        typeReferenceDirectives: FileReference[];
+        languageVariant: LanguageVariant;
+        isDeclarationFile: boolean;
+        /**
+         * lib.d.ts should have a reference comment like
+         *
+         *  /// <reference no-default-lib="true"/>
+         *
+         * If any other file has this comment, it signals not to include lib.d.ts
+         * because this containing file is intended to act as a default library.
+         */
+        hasNoDefaultLib: boolean;
+        languageVersion: ScriptTarget;
+    }
+    interface ScriptReferenceHost {
+        getCompilerOptions(): CompilerOptions;
+        getSourceFile(fileName: string): SourceFile;
+        getSourceFileByPath(path: Path): SourceFile;
+        getCurrentDirectory(): string;
+    }
+    interface ParseConfigHost {
+        readDirectory(rootDir: string, extension: string, exclude: string[]): string[];
+    }
+    interface WriteFileCallback {
+        (fileName: string, data: string, writeByteOrderMark: boolean, onError?: (message: string) => void, sourceFiles?: SourceFile[]): void;
+    }
+    class OperationCanceledException {
+    }
+    interface CancellationToken {
+        isCancellationRequested(): boolean;
+        /** @throws OperationCanceledException if isCancellationRequested is true */
+        throwIfCancellationRequested(): void;
+    }
+    interface Program extends ScriptReferenceHost {
+        /**
+         * Get a list of root file names that were passed to a 'createProgram'
+         */
+        getRootFileNames(): string[];
+        /**
+         * Get a list of files in the program
+         */
+        getSourceFiles(): SourceFile[];
+        /**
+         * Emits the JavaScript and declaration files.  If targetSourceFile is not specified, then
+         * the JavaScript and declaration files will be produced for all the files in this program.
+         * If targetSourceFile is specified, then only the JavaScript and declaration for that
+         * specific file will be generated.
+         *
+         * If writeFile is not specified then the writeFile callback from the compiler host will be
+         * used for writing the JavaScript and declaration files.  Otherwise, the writeFile parameter
+         * will be invoked when writing the JavaScript and declaration files.
+         */
+        emit(targetSourceFile?: SourceFile, writeFile?: WriteFileCallback, cancellationToken?: CancellationToken): EmitResult;
+        getOptionsDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
+        getGlobalDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
+        getSyntacticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+        getSemanticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+        getDeclarationDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+        /**
+         * Gets a type checker that can be used to semantically analyze source fils in the program.
+         */
+        getTypeChecker(): TypeChecker;
+    }
+    interface SourceMapSpan {
+        /** Line number in the .js file. */
+        emittedLine: number;
+        /** Column number in the .js file. */
+        emittedColumn: number;
+        /** Line number in the .ts file. */
+        sourceLine: number;
+        /** Column number in the .ts file. */
+        sourceColumn: number;
+        /** Optional name (index into names array) associated with this span. */
+        nameIndex?: number;
+        /** .ts file (index into sources array) associated with this span */
+        sourceIndex: number;
+    }
+    interface SourceMapData {
+        sourceMapFilePath: string;
+        jsSourceMappingURL: string;
+        sourceMapFile: string;
+        sourceMapSourceRoot: string;
+        sourceMapSources: string[];
+        sourceMapSourcesContent?: string[];
+        inputSourceFileNames: string[];
+        sourceMapNames?: string[];
+        sourceMapMappings: string;
+        sourceMapDecodedMappings: SourceMapSpan[];
+    }
+    /** Return code used by getEmitOutput function to indicate status of the function */
+    enum ExitStatus {
+        Success = 0,
+        DiagnosticsPresent_OutputsSkipped = 1,
+        DiagnosticsPresent_OutputsGenerated = 2,
+    }
+    interface EmitResult {
+        emitSkipped: boolean;
+        /** Contains declaration emit diagnostics */
+        diagnostics: Diagnostic[];
+        emittedFiles: string[];
+    }
+    interface TypeChecker {
+        getTypeOfSymbolAtLocation(symbol: Symbol, node: Node): Type;
+        getDeclaredTypeOfSymbol(symbol: Symbol): Type;
+        getPropertiesOfType(type: Type): Symbol[];
+        getPropertyOfType(type: Type, propertyName: string): Symbol;
+        getSignaturesOfType(type: Type, kind: SignatureKind): Signature[];
+        getIndexTypeOfType(type: Type, kind: IndexKind): Type;
+        getBaseTypes(type: InterfaceType): ObjectType[];
+        getReturnTypeOfSignature(signature: Signature): Type;
+        getNonNullableType(type: Type): Type;
+        getSymbolsInScope(location: Node, meaning: SymbolFlags): Symbol[];
+        getSymbolAtLocation(node: Node): Symbol;
+        getSymbolsOfParameterPropertyDeclaration(parameter: ParameterDeclaration, parameterName: string): Symbol[];
+        getShorthandAssignmentValueSymbol(location: Node): Symbol;
+        getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol;
+        getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol;
+        getTypeAtLocation(node: Node): Type;
+        typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
+        symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): string;
+        getSymbolDisplayBuilder(): SymbolDisplayBuilder;
+        getFullyQualifiedName(symbol: Symbol): string;
+        getAugmentedPropertiesOfType(type: Type): Symbol[];
+        getRootSymbols(symbol: Symbol): Symbol[];
+        getContextualType(node: Expression): Type;
+        getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature;
+        getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature;
+        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
+        isUndefinedSymbol(symbol: Symbol): boolean;
+        isArgumentsSymbol(symbol: Symbol): boolean;
+        isUnknownSymbol(symbol: Symbol): boolean;
+        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
+        isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName, propertyName: string): boolean;
+        getAliasedSymbol(symbol: Symbol): Symbol;
+        getExportsOfModule(moduleSymbol: Symbol): Symbol[];
+        getJsxElementAttributesType(elementNode: JsxOpeningLikeElement): Type;
+        getJsxIntrinsicTagNames(): Symbol[];
+        isOptionalParameter(node: ParameterDeclaration): boolean;
+    }
+    interface SymbolDisplayBuilder {
+        buildTypeDisplay(type: Type, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildSymbolDisplay(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): void;
+        buildSignatureDisplay(signatures: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
+        buildParameterDisplay(parameter: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildTypeParameterDisplay(tp: TypeParameter, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildTypePredicateDisplay(predicate: TypePredicate, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildTypeParameterDisplayFromSymbol(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildDisplayForParametersAndDelimiters(thisType: Type, parameters: Symbol[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildDisplayForTypeParametersAndDelimiters(typeParameters: TypeParameter[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildReturnTypeDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+    }
+    interface SymbolWriter {
+        writeKeyword(text: string): void;
+        writeOperator(text: string): void;
+        writePunctuation(text: string): void;
+        writeSpace(text: string): void;
+        writeStringLiteral(text: string): void;
+        writeParameter(text: string): void;
+        writeSymbol(text: string, symbol: Symbol): void;
+        writeLine(): void;
+        increaseIndent(): void;
+        decreaseIndent(): void;
+        clear(): void;
+        trackSymbol(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): void;
+        reportInaccessibleThisError(): void;
+    }
+    enum TypeFormatFlags {
+        None = 0,
+        WriteArrayAsGenericType = 1,
+        UseTypeOfFunction = 2,
+        NoTruncation = 4,
+        WriteArrowStyleSignature = 8,
+        WriteOwnNameForAnyLike = 16,
+        WriteTypeArgumentsOfSignature = 32,
+        InElementType = 64,
+        UseFullyQualifiedType = 128,
+        InFirstTypeArgument = 256,
+    }
+    enum SymbolFormatFlags {
+        None = 0,
+        WriteTypeParametersOrArguments = 1,
+        UseOnlyExternalAliasing = 2,
+    }
+    enum TypePredicateKind {
+        This = 0,
+        Identifier = 1,
+    }
+    interface TypePredicateBase {
+        kind: TypePredicateKind;
+        type: Type;
+    }
+    interface ThisTypePredicate extends TypePredicateBase {
+        _thisTypePredicateBrand: any;
+    }
+    interface IdentifierTypePredicate extends TypePredicateBase {
+        parameterName: string;
+        parameterIndex: number;
+    }
+    type TypePredicate = IdentifierTypePredicate | ThisTypePredicate;
+    enum SymbolFlags {
+        None = 0,
+        FunctionScopedVariable = 1,
+        BlockScopedVariable = 2,
+        Property = 4,
+        EnumMember = 8,
+        Function = 16,
+        Class = 32,
+        Interface = 64,
+        ConstEnum = 128,
+        RegularEnum = 256,
+        ValueModule = 512,
+        NamespaceModule = 1024,
+        TypeLiteral = 2048,
+        ObjectLiteral = 4096,
+        Method = 8192,
+        Constructor = 16384,
+        GetAccessor = 32768,
+        SetAccessor = 65536,
+        Signature = 131072,
+        TypeParameter = 262144,
+        TypeAlias = 524288,
+        ExportValue = 1048576,
+        ExportType = 2097152,
+        ExportNamespace = 4194304,
+        Alias = 8388608,
+        Instantiated = 16777216,
+        Merged = 33554432,
+        Transient = 67108864,
+        Prototype = 134217728,
+        SyntheticProperty = 268435456,
+        Optional = 536870912,
+        ExportStar = 1073741824,
+        Enum = 384,
+        Variable = 3,
+        Value = 107455,
+        Type = 793056,
+        Namespace = 1536,
+        Module = 1536,
+        Accessor = 98304,
+        FunctionScopedVariableExcludes = 107454,
+        BlockScopedVariableExcludes = 107455,
+        ParameterExcludes = 107455,
+        PropertyExcludes = 0,
+        EnumMemberExcludes = 107455,
+        FunctionExcludes = 106927,
+        ClassExcludes = 899519,
+        InterfaceExcludes = 792960,
+        RegularEnumExcludes = 899327,
+        ConstEnumExcludes = 899967,
+        ValueModuleExcludes = 106639,
+        NamespaceModuleExcludes = 0,
+        MethodExcludes = 99263,
+        GetAccessorExcludes = 41919,
+        SetAccessorExcludes = 74687,
+        TypeParameterExcludes = 530912,
+        TypeAliasExcludes = 793056,
+        AliasExcludes = 8388608,
+        ModuleMember = 8914931,
+        ExportHasLocal = 944,
+        HasExports = 1952,
+        HasMembers = 6240,
+        BlockScoped = 418,
+        PropertyOrAccessor = 98308,
+        Export = 7340032,
+    }
+    interface Symbol {
+        flags: SymbolFlags;
+        name: string;
+        declarations?: Declaration[];
+        valueDeclaration?: Declaration;
+        members?: SymbolTable;
+        exports?: SymbolTable;
+        globalExports?: SymbolTable;
+    }
+    interface SymbolTable {
+        [index: string]: Symbol;
+    }
+    enum TypeFlags {
+        Any = 1,
+        String = 2,
+        Number = 4,
+        Boolean = 8,
+        Void = 16,
+        Undefined = 32,
+        Null = 64,
+        Enum = 128,
+        StringLiteral = 256,
+        TypeParameter = 512,
+        Class = 1024,
+        Interface = 2048,
+        Reference = 4096,
+        Tuple = 8192,
+        Union = 16384,
+        Intersection = 32768,
+        Anonymous = 65536,
+        Instantiated = 131072,
+        ObjectLiteral = 524288,
+        ESSymbol = 16777216,
+        ThisType = 33554432,
+        ObjectLiteralPatternWithComputedProperties = 67108864,
+        Never = 134217728,
+        Falsy = 126,
+        StringLike = 258,
+        NumberLike = 132,
+        ObjectType = 80896,
+        UnionOrIntersection = 49152,
+        StructuredType = 130048,
+        Narrowable = 16908175,
+    }
+    type DestructuringPattern = BindingPattern | ObjectLiteralExpression | ArrayLiteralExpression;
+    interface Type {
+        flags: TypeFlags;
+        symbol?: Symbol;
+        pattern?: DestructuringPattern;
+    }
+    interface StringLiteralType extends Type {
+        text: string;
+    }
+    interface ObjectType extends Type {
+    }
+    interface InterfaceType extends ObjectType {
+        typeParameters: TypeParameter[];
+        outerTypeParameters: TypeParameter[];
+        localTypeParameters: TypeParameter[];
+        thisType: TypeParameter;
+    }
+    interface InterfaceTypeWithDeclaredMembers extends InterfaceType {
+        declaredProperties: Symbol[];
+        declaredCallSignatures: Signature[];
+        declaredConstructSignatures: Signature[];
+        declaredStringIndexInfo: IndexInfo;
+        declaredNumberIndexInfo: IndexInfo;
+    }
+    interface TypeReference extends ObjectType {
+        target: GenericType;
+        typeArguments: Type[];
+    }
+    interface GenericType extends InterfaceType, TypeReference {
+    }
+    interface TupleType extends ObjectType {
+        elementTypes: Type[];
+    }
+    interface UnionOrIntersectionType extends Type {
+        types: Type[];
+    }
+    interface UnionType extends UnionOrIntersectionType {
+    }
+    interface IntersectionType extends UnionOrIntersectionType {
+    }
+    interface TypeParameter extends Type {
+        constraint: Type;
+    }
+    enum SignatureKind {
+        Call = 0,
+        Construct = 1,
+    }
+    interface Signature {
+        declaration: SignatureDeclaration;
+        typeParameters: TypeParameter[];
+        parameters: Symbol[];
+        thisType?: Type;
+    }
+    enum IndexKind {
+        String = 0,
+        Number = 1,
+    }
+    interface IndexInfo {
+        type: Type;
+        isReadonly: boolean;
+        declaration?: SignatureDeclaration;
+    }
+    interface DiagnosticMessage {
+        key: string;
+        category: DiagnosticCategory;
+        code: number;
+        message: string;
+    }
+    /**
+     * A linked list of formatted diagnostic messages to be used as part of a multiline message.
+     * It is built from the bottom up, leaving the head to be the "main" diagnostic.
+     * While it seems that DiagnosticMessageChain is structurally similar to DiagnosticMessage,
+     * the difference is that messages are all preformatted in DMC.
+     */
+    interface DiagnosticMessageChain {
+        messageText: string;
+        category: DiagnosticCategory;
+        code: number;
+        next?: DiagnosticMessageChain;
+    }
+    interface Diagnostic {
+        file: SourceFile;
+        start: number;
+        length: number;
+        messageText: string | DiagnosticMessageChain;
+        category: DiagnosticCategory;
+        code: number;
+    }
+    enum DiagnosticCategory {
+        Warning = 0,
+        Error = 1,
+        Message = 2,
+    }
+    enum ModuleResolutionKind {
+        Classic = 1,
+        NodeJs = 2,
+    }
+    type RootPaths = string[];
+    type PathSubstitutions = Map<string[]>;
+    type TsConfigOnlyOptions = RootPaths | PathSubstitutions;
+    type CompilerOptionsValue = string | number | boolean | (string | number)[] | TsConfigOnlyOptions;
+    interface CompilerOptions {
+        allowJs?: boolean;
+        allowSyntheticDefaultImports?: boolean;
+        allowUnreachableCode?: boolean;
+        allowUnusedLabels?: boolean;
+        baseUrl?: string;
+        charset?: string;
+        declaration?: boolean;
+        declarationDir?: string;
+        emitBOM?: boolean;
+        emitDecoratorMetadata?: boolean;
+        experimentalDecorators?: boolean;
+        forceConsistentCasingInFileNames?: boolean;
+        inlineSourceMap?: boolean;
+        inlineSources?: boolean;
+        isolatedModules?: boolean;
+        jsx?: JsxEmit;
+        lib?: string[];
+        locale?: string;
+        mapRoot?: string;
+        module?: ModuleKind;
+        moduleResolution?: ModuleResolutionKind;
+        newLine?: NewLineKind;
+        noEmit?: boolean;
+        noEmitHelpers?: boolean;
+        noEmitOnError?: boolean;
+        noErrorTruncation?: boolean;
+        noFallthroughCasesInSwitch?: boolean;
+        noImplicitAny?: boolean;
+        noImplicitReturns?: boolean;
+        noImplicitThis?: boolean;
+        noImplicitUseStrict?: boolean;
+        noLib?: boolean;
+        noResolve?: boolean;
+        out?: string;
+        outDir?: string;
+        outFile?: string;
+        paths?: PathSubstitutions;
+        preserveConstEnums?: boolean;
+        project?: string;
+        reactNamespace?: string;
+        removeComments?: boolean;
+        rootDir?: string;
+        rootDirs?: RootPaths;
+        skipLibCheck?: boolean;
+        skipDefaultLibCheck?: boolean;
+        sourceMap?: boolean;
+        sourceRoot?: string;
+        strictNullChecks?: boolean;
+        suppressExcessPropertyErrors?: boolean;
+        suppressImplicitAnyIndexErrors?: boolean;
+        target?: ScriptTarget;
+        traceResolution?: boolean;
+        types?: string[];
+        typesSearchPaths?: string[];
+        [option: string]: CompilerOptionsValue | undefined;
+    }
+    interface TypingOptions {
+        enableAutoDiscovery?: boolean;
+        include?: string[];
+        exclude?: string[];
+        [option: string]: string[] | boolean | undefined;
+    }
+    interface DiscoverTypingsInfo {
+        fileNames: string[];
+        projectRootPath: string;
+        safeListPath: string;
+        packageNameToTypingLocation: Map<string>;
+        typingOptions: TypingOptions;
+        compilerOptions: CompilerOptions;
+    }
+    enum ModuleKind {
+        None = 0,
+        CommonJS = 1,
+        AMD = 2,
+        UMD = 3,
+        System = 4,
+        ES6 = 5,
+        ES2015 = 5,
+    }
+    enum JsxEmit {
+        None = 0,
+        Preserve = 1,
+        React = 2,
+    }
+    enum NewLineKind {
+        CarriageReturnLineFeed = 0,
+        LineFeed = 1,
+    }
+    interface LineAndCharacter {
+        line: number;
+        character: number;
+    }
+    enum ScriptKind {
+        Unknown = 0,
+        JS = 1,
+        JSX = 2,
+        TS = 3,
+        TSX = 4,
+    }
+    enum ScriptTarget {
+        ES3 = 0,
+        ES5 = 1,
+        ES6 = 2,
+        ES2015 = 2,
+        Latest = 2,
+    }
+    enum LanguageVariant {
+        Standard = 0,
+        JSX = 1,
+    }
+    interface ParsedCommandLine {
+        options: CompilerOptions;
+        typingOptions?: TypingOptions;
+        fileNames: string[];
+        raw?: any;
+        errors: Diagnostic[];
+    }
+    interface ModuleResolutionHost {
+        fileExists(fileName: string): boolean;
+        readFile(fileName: string): string;
+        trace?(s: string): void;
+        directoryExists?(directoryName: string): boolean;
+        realpath?(path: string): string;
+        getCurrentDirectory?(): string;
+    }
+    interface ResolvedModule {
+        resolvedFileName: string;
+        isExternalLibraryImport?: boolean;
+    }
+    interface ResolvedModuleWithFailedLookupLocations {
+        resolvedModule: ResolvedModule;
+        failedLookupLocations: string[];
+    }
+    interface ResolvedTypeReferenceDirective {
+        primary: boolean;
+        resolvedFileName?: string;
+    }
+    interface ResolvedTypeReferenceDirectiveWithFailedLookupLocations {
+        resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective;
+        failedLookupLocations: string[];
+    }
+    interface CompilerHost extends ModuleResolutionHost {
+        getSourceFile(fileName: string, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile;
+        getSourceFileByPath?(fileName: string, path: Path, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile;
+        getCancellationToken?(): CancellationToken;
+        getDefaultLibFileName(options: CompilerOptions): string;
+        getDefaultLibLocation?(): string;
+        getDefaultTypeDirectiveNames?(rootPath: string): string[];
+        writeFile: WriteFileCallback;
+        getCurrentDirectory(): string;
+        getCanonicalFileName(fileName: string): string;
+        useCaseSensitiveFileNames(): boolean;
+        getNewLine(): string;
+        resolveModuleNames?(moduleNames: string[], containingFile: string): ResolvedModule[];
+        /**
+         * This method is a companion for 'resolveModuleNames' and is used to resolve 'types' references to actual type declaration files
+         */
+        resolveTypeReferenceDirectives?(typeReferenceDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
+    }
+    interface TextSpan {
+        start: number;
+        length: number;
+    }
+    interface TextChangeRange {
+        span: TextSpan;
+        newLength: number;
+    }
+    interface SyntaxList extends Node {
+        _children: Node[];
+    }
+}
+declare namespace ts {
+    type FileWatcherCallback = (fileName: string, removed?: boolean) => void;
+    type DirectoryWatcherCallback = (fileName: string) => void;
+    interface WatchedFile {
+        fileName: string;
+        callback: FileWatcherCallback;
+        mtime?: Date;
+    }
+    interface System {
+        args: string[];
+        newLine: string;
+        useCaseSensitiveFileNames: boolean;
+        write(s: string): void;
+        readFile(path: string, encoding?: string): string;
+        writeFile(path: string, data: string, writeByteOrderMark?: boolean): void;
+        watchFile?(path: string, callback: FileWatcherCallback): FileWatcher;
+        watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
+        resolvePath(path: string): string;
+        fileExists(path: string): boolean;
+        directoryExists(path: string): boolean;
+        createDirectory(path: string): void;
+        getExecutingFilePath(): string;
+        getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
+        readDirectory(path: string, extension?: string, exclude?: string[]): string[];
+        getModifiedTime?(path: string): Date;
+        createHash?(data: string): string;
+        getMemoryUsage?(): number;
+        exit(exitCode?: number): void;
+        realpath?(path: string): string;
+    }
+    interface FileWatcher {
+        close(): void;
+    }
+    interface DirectoryWatcher extends FileWatcher {
+        directoryName: string;
+        referenceCount: number;
+    }
+    var sys: System;
+}
+declare namespace ts {
+    interface ErrorCallback {
+        (message: DiagnosticMessage, length: number): void;
+    }
+    interface Scanner {
+        getStartPos(): number;
+        getToken(): SyntaxKind;
+        getTextPos(): number;
+        getTokenPos(): number;
+        getTokenText(): string;
+        getTokenValue(): string;
+        hasExtendedUnicodeEscape(): boolean;
+        hasPrecedingLineBreak(): boolean;
+        isIdentifier(): boolean;
+        isReservedWord(): boolean;
+        isUnterminated(): boolean;
+        reScanGreaterToken(): SyntaxKind;
+        reScanSlashToken(): SyntaxKind;
+        reScanTemplateToken(): SyntaxKind;
+        scanJsxIdentifier(): SyntaxKind;
+        reScanJsxToken(): SyntaxKind;
+        scanJsxToken(): SyntaxKind;
+        scanJSDocToken(): SyntaxKind;
+        scan(): SyntaxKind;
+        setText(text: string, start?: number, length?: number): void;
+        setOnError(onError: ErrorCallback): void;
+        setScriptTarget(scriptTarget: ScriptTarget): void;
+        setLanguageVariant(variant: LanguageVariant): void;
+        setTextPos(textPos: number): void;
+        lookAhead<T>(callback: () => T): T;
+        scanRange<T>(start: number, length: number, callback: () => T): T;
+        tryScan<T>(callback: () => T): T;
+    }
+    function tokenToString(t: SyntaxKind): string;
+    function getPositionOfLineAndCharacter(sourceFile: SourceFile, line: number, character: number): number;
+    function getLineAndCharacterOfPosition(sourceFile: SourceFile, position: number): LineAndCharacter;
+    function isWhiteSpace(ch: number): boolean;
+    function isLineBreak(ch: number): boolean;
+    function couldStartTrivia(text: string, pos: number): boolean;
+    function getLeadingCommentRanges(text: string, pos: number): CommentRange[];
+    function getTrailingCommentRanges(text: string, pos: number): CommentRange[];
+    /** Optionally, get the shebang */
+    function getShebang(text: string): string;
+    function isIdentifierStart(ch: number, languageVersion: ScriptTarget): boolean;
+    function isIdentifierPart(ch: number, languageVersion: ScriptTarget): boolean;
+    function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, text?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
+}
+declare namespace ts {
+    function getDefaultLibFileName(options: CompilerOptions): string;
+    function textSpanEnd(span: TextSpan): number;
+    function textSpanIsEmpty(span: TextSpan): boolean;
+    function textSpanContainsPosition(span: TextSpan, position: number): boolean;
+    function textSpanContainsTextSpan(span: TextSpan, other: TextSpan): boolean;
+    function textSpanOverlapsWith(span: TextSpan, other: TextSpan): boolean;
+    function textSpanOverlap(span1: TextSpan, span2: TextSpan): TextSpan;
+    function textSpanIntersectsWithTextSpan(span: TextSpan, other: TextSpan): boolean;
+    function textSpanIntersectsWith(span: TextSpan, start: number, length: number): boolean;
+    function decodedTextSpanIntersectsWith(start1: number, length1: number, start2: number, length2: number): boolean;
+    function textSpanIntersectsWithPosition(span: TextSpan, position: number): boolean;
+    function textSpanIntersection(span1: TextSpan, span2: TextSpan): TextSpan;
+    function createTextSpan(start: number, length: number): TextSpan;
+    function createTextSpanFromBounds(start: number, end: number): TextSpan;
+    function textChangeRangeNewSpan(range: TextChangeRange): TextSpan;
+    function textChangeRangeIsUnchanged(range: TextChangeRange): boolean;
+    function createTextChangeRange(span: TextSpan, newLength: number): TextChangeRange;
+    let unchangedTextChangeRange: TextChangeRange;
+    /**
+     * Called to merge all the changes that occurred across several versions of a script snapshot
+     * into a single change.  i.e. if a user keeps making successive edits to a script we will
+     * have a text change from V1 to V2, V2 to V3, ..., Vn.
+     *
+     * This function will then merge those changes into a single change range valid between V1 and
+     * Vn.
+     */
+    function collapseTextChangeRangesAcrossMultipleVersions(changes: TextChangeRange[]): TextChangeRange;
+    function getTypeParameterOwner(d: Declaration): Declaration;
+    function isParameterPropertyDeclaration(node: ParameterDeclaration): boolean;
+    function startsWith(str: string, prefix: string): boolean;
+    function endsWith(str: string, suffix: string): boolean;
+}
+declare namespace ts {
+    function createNode(kind: SyntaxKind, pos?: number, end?: number): Node;
+    function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodeArray?: (nodes: Node[]) => T): T;
+    function createSourceFile(fileName: string, sourceText: string, languageVersion: ScriptTarget, setParentNodes?: boolean, scriptKind?: ScriptKind): SourceFile;
+    function isExternalModule(file: SourceFile): boolean;
+    function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
+}
+declare namespace ts {
+    const version: string;
+    function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean): string;
+    function resolveTripleslashReference(moduleName: string, containingFile: string): string;
+    /**
+     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
+     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
+     * is assumed to be the same as root directory of the project.
+     */
+    function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string, options: CompilerOptions, host: ModuleResolutionHost): ResolvedTypeReferenceDirectiveWithFailedLookupLocations;
+    function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
+    function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
+    function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
+    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
+    function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+    function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
+    function getDefaultTypeDirectiveNames(options: CompilerOptions, rootFiles: string[], host: CompilerHost): string[];
+    function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program;
+}
+declare namespace ts {
+    /**
+      * Read tsconfig.json file
+      * @param fileName The path to the config file
+      */
+    function readConfigFile(fileName: string, readFile: (path: string) => string): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+      * Parse the text of the tsconfig.json file
+      * @param fileName The path to the config file
+      * @param jsonText The text of the config file
+      */
+    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+      * Parse the contents of a config file (tsconfig.json).
+      * @param json The contents of the config file to parse
+      * @param host Instance of ParseConfigHost used to enumerate files in folder.
+      * @param basePath A root directory to resolve relative path entries in the config
+      *    file to. e.g. outDir
+      */
+    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string): ParsedCommandLine;
+    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: CompilerOptions;
+        errors: Diagnostic[];
+    };
+    function convertTypingOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: CompilerOptions;
+        errors: Diagnostic[];
+    };
+}
+declare namespace ts {
+    /** The version of the language service API */
+    const servicesVersion: string;
+    interface Node {
+        getSourceFile(): SourceFile;
+        getChildCount(sourceFile?: SourceFile): number;
+        getChildAt(index: number, sourceFile?: SourceFile): Node;
+        getChildren(sourceFile?: SourceFile): Node[];
+        getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
+        getFullStart(): number;
+        getEnd(): number;
+        getWidth(sourceFile?: SourceFile): number;
+        getFullWidth(): number;
+        getLeadingTriviaWidth(sourceFile?: SourceFile): number;
+        getFullText(sourceFile?: SourceFile): string;
+        getText(sourceFile?: SourceFile): string;
+        getFirstToken(sourceFile?: SourceFile): Node;
+        getLastToken(sourceFile?: SourceFile): Node;
+    }
+    interface Symbol {
+        getFlags(): SymbolFlags;
+        getName(): string;
+        getDeclarations(): Declaration[];
+        getDocumentationComment(): SymbolDisplayPart[];
+    }
+    interface Type {
+        getFlags(): TypeFlags;
+        getSymbol(): Symbol;
+        getProperties(): Symbol[];
+        getProperty(propertyName: string): Symbol;
+        getApparentProperties(): Symbol[];
+        getCallSignatures(): Signature[];
+        getConstructSignatures(): Signature[];
+        getStringIndexType(): Type;
+        getNumberIndexType(): Type;
+        getBaseTypes(): ObjectType[];
+        getNonNullableType(): Type;
+    }
+    interface Signature {
+        getDeclaration(): SignatureDeclaration;
+        getTypeParameters(): Type[];
+        getParameters(): Symbol[];
+        getReturnType(): Type;
+        getDocumentationComment(): SymbolDisplayPart[];
+    }
+    interface SourceFile {
+        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+        getLineStarts(): number[];
+        getPositionOfLineAndCharacter(line: number, character: number): number;
+        update(newText: string, textChangeRange: TextChangeRange): SourceFile;
+    }
+    /**
+     * Represents an immutable snapshot of a script at a specified time.Once acquired, the
+     * snapshot is observably immutable. i.e. the same calls with the same parameters will return
+     * the same values.
+     */
+    interface IScriptSnapshot {
+        /** Gets a portion of the script snapshot specified by [start, end). */
+        getText(start: number, end: number): string;
+        /** Gets the length of this script snapshot. */
+        getLength(): number;
+        /**
+         * Gets the TextChangeRange that describe how the text changed between this text and
+         * an older version.  This information is used by the incremental parser to determine
+         * what sections of the script need to be re-parsed.  'undefined' can be returned if the
+         * change range cannot be determined.  However, in that case, incremental parsing will
+         * not happen and the entire document will be re - parsed.
+         */
+        getChangeRange(oldSnapshot: IScriptSnapshot): TextChangeRange;
+        /** Releases all resources held by this script snapshot */
+        dispose?(): void;
+    }
+    namespace ScriptSnapshot {
+        function fromString(text: string): IScriptSnapshot;
+    }
+    interface PreProcessedFileInfo {
+        referencedFiles: FileReference[];
+        typeReferenceDirectives: FileReference[];
+        importedFiles: FileReference[];
+        ambientExternalModules: string[];
+        isLibFile: boolean;
+    }
+    interface HostCancellationToken {
+        isCancellationRequested(): boolean;
+    }
+    interface LanguageServiceHost {
+        getCompilationSettings(): CompilerOptions;
+        getNewLine?(): string;
+        getProjectVersion?(): string;
+        getScriptFileNames(): string[];
+        getScriptKind?(fileName: string): ScriptKind;
+        getScriptVersion(fileName: string): string;
+        getScriptSnapshot(fileName: string): IScriptSnapshot | undefined;
+        getLocalizedDiagnosticMessages?(): any;
+        getCancellationToken?(): HostCancellationToken;
+        getCurrentDirectory(): string;
+        getDefaultLibFileName(options: CompilerOptions): string;
+        log?(s: string): void;
+        trace?(s: string): void;
+        error?(s: string): void;
+        useCaseSensitiveFileNames?(): boolean;
+        resolveModuleNames?(moduleNames: string[], containingFile: string): ResolvedModule[];
+        resolveTypeReferenceDirectives?(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
+        directoryExists?(directoryName: string): boolean;
+    }
+    interface LanguageService {
+        cleanupSemanticCache(): void;
+        getSyntacticDiagnostics(fileName: string): Diagnostic[];
+        getSemanticDiagnostics(fileName: string): Diagnostic[];
+        getCompilerOptionsDiagnostics(): Diagnostic[];
+        /**
+         * @deprecated Use getEncodedSyntacticClassifications instead.
+         */
+        getSyntacticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[];
+        /**
+         * @deprecated Use getEncodedSemanticClassifications instead.
+         */
+        getSemanticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[];
+        getEncodedSyntacticClassifications(fileName: string, span: TextSpan): Classifications;
+        getEncodedSemanticClassifications(fileName: string, span: TextSpan): Classifications;
+        getCompletionsAtPosition(fileName: string, position: number): CompletionInfo;
+        getCompletionEntryDetails(fileName: string, position: number, entryName: string): CompletionEntryDetails;
+        getQuickInfoAtPosition(fileName: string, position: number): QuickInfo;
+        getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): TextSpan;
+        getBreakpointStatementAtPosition(fileName: string, position: number): TextSpan;
+        getSignatureHelpItems(fileName: string, position: number): SignatureHelpItems;
+        getRenameInfo(fileName: string, position: number): RenameInfo;
+        findRenameLocations(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): RenameLocation[];
+        getDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[];
+        getTypeDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[];
+        getReferencesAtPosition(fileName: string, position: number): ReferenceEntry[];
+        findReferences(fileName: string, position: number): ReferencedSymbol[];
+        getDocumentHighlights(fileName: string, position: number, filesToSearch: string[]): DocumentHighlights[];
+        /** @deprecated */
+        getOccurrencesAtPosition(fileName: string, position: number): ReferenceEntry[];
+        getNavigateToItems(searchValue: string, maxResultCount?: number): NavigateToItem[];
+        getNavigationBarItems(fileName: string): NavigationBarItem[];
+        getOutliningSpans(fileName: string): OutliningSpan[];
+        getTodoComments(fileName: string, descriptors: TodoCommentDescriptor[]): TodoComment[];
+        getBraceMatchingAtPosition(fileName: string, position: number): TextSpan[];
+        getIndentationAtPosition(fileName: string, position: number, options: EditorOptions): number;
+        getFormattingEditsForRange(fileName: string, start: number, end: number, options: FormatCodeOptions): TextChange[];
+        getFormattingEditsForDocument(fileName: string, options: FormatCodeOptions): TextChange[];
+        getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: FormatCodeOptions): TextChange[];
+        getDocCommentTemplateAtPosition(fileName: string, position: number): TextInsertion;
+        isValidBraceCompletionAtPostion(fileName: string, position: number, openingBrace: number): boolean;
+        getEmitOutput(fileName: string): EmitOutput;
+        getProgram(): Program;
+        dispose(): void;
+    }
+    interface Classifications {
+        spans: number[];
+        endOfLineState: EndOfLineState;
+    }
+    interface ClassifiedSpan {
+        textSpan: TextSpan;
+        classificationType: string;
+    }
+    interface NavigationBarItem {
+        text: string;
+        kind: string;
+        kindModifiers: string;
+        spans: TextSpan[];
+        childItems: NavigationBarItem[];
+        indent: number;
+        bolded: boolean;
+        grayed: boolean;
+    }
+    interface TodoCommentDescriptor {
+        text: string;
+        priority: number;
+    }
+    interface TodoComment {
+        descriptor: TodoCommentDescriptor;
+        message: string;
+        position: number;
+    }
+    class TextChange {
+        span: TextSpan;
+        newText: string;
+    }
+    interface TextInsertion {
+        newText: string;
+        /** The position in newText the caret should point to after the insertion. */
+        caretOffset: number;
+    }
+    interface RenameLocation {
+        textSpan: TextSpan;
+        fileName: string;
+    }
+    interface ReferenceEntry {
+        textSpan: TextSpan;
+        fileName: string;
+        isWriteAccess: boolean;
+    }
+    interface DocumentHighlights {
+        fileName: string;
+        highlightSpans: HighlightSpan[];
+    }
+    namespace HighlightSpanKind {
+        const none: string;
+        const definition: string;
+        const reference: string;
+        const writtenReference: string;
+    }
+    interface HighlightSpan {
+        fileName?: string;
+        textSpan: TextSpan;
+        kind: string;
+    }
+    interface NavigateToItem {
+        name: string;
+        kind: string;
+        kindModifiers: string;
+        matchKind: string;
+        isCaseSensitive: boolean;
+        fileName: string;
+        textSpan: TextSpan;
+        containerName: string;
+        containerKind: string;
+    }
+    interface EditorOptions {
+        IndentSize: number;
+        TabSize: number;
+        NewLineCharacter: string;
+        ConvertTabsToSpaces: boolean;
+        IndentStyle: IndentStyle;
+    }
+    enum IndentStyle {
+        None = 0,
+        Block = 1,
+        Smart = 2,
+    }
+    interface FormatCodeOptions extends EditorOptions {
+        InsertSpaceAfterCommaDelimiter: boolean;
+        InsertSpaceAfterSemicolonInForStatements: boolean;
+        InsertSpaceBeforeAndAfterBinaryOperators: boolean;
+        InsertSpaceAfterKeywordsInControlFlowStatements: boolean;
+        InsertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
+        InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
+        InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: boolean;
+        InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
+        PlaceOpenBraceOnNewLineForFunctions: boolean;
+        PlaceOpenBraceOnNewLineForControlBlocks: boolean;
+        [s: string]: boolean | number | string;
+    }
+    interface DefinitionInfo {
+        fileName: string;
+        textSpan: TextSpan;
+        kind: string;
+        name: string;
+        containerKind: string;
+        containerName: string;
+    }
+    interface ReferencedSymbol {
+        definition: DefinitionInfo;
+        references: ReferenceEntry[];
+    }
+    enum SymbolDisplayPartKind {
+        aliasName = 0,
+        className = 1,
+        enumName = 2,
+        fieldName = 3,
+        interfaceName = 4,
+        keyword = 5,
+        lineBreak = 6,
+        numericLiteral = 7,
+        stringLiteral = 8,
+        localName = 9,
+        methodName = 10,
+        moduleName = 11,
+        operator = 12,
+        parameterName = 13,
+        propertyName = 14,
+        punctuation = 15,
+        space = 16,
+        text = 17,
+        typeParameterName = 18,
+        enumMemberName = 19,
+        functionName = 20,
+        regularExpressionLiteral = 21,
+    }
+    interface SymbolDisplayPart {
+        text: string;
+        kind: string;
+    }
+    interface QuickInfo {
+        kind: string;
+        kindModifiers: string;
+        textSpan: TextSpan;
+        displayParts: SymbolDisplayPart[];
+        documentation: SymbolDisplayPart[];
+    }
+    interface RenameInfo {
+        canRename: boolean;
+        localizedErrorMessage: string;
+        displayName: string;
+        fullDisplayName: string;
+        kind: string;
+        kindModifiers: string;
+        triggerSpan: TextSpan;
+    }
+    interface SignatureHelpParameter {
+        name: string;
+        documentation: SymbolDisplayPart[];
+        displayParts: SymbolDisplayPart[];
+        isOptional: boolean;
+    }
+    /**
+     * Represents a single signature to show in signature help.
+     * The id is used for subsequent calls into the language service to ask questions about the
+     * signature help item in the context of any documents that have been updated.  i.e. after
+     * an edit has happened, while signature help is still active, the host can ask important
+     * questions like 'what parameter is the user currently contained within?'.
+     */
+    interface SignatureHelpItem {
+        isVariadic: boolean;
+        prefixDisplayParts: SymbolDisplayPart[];
+        suffixDisplayParts: SymbolDisplayPart[];
+        separatorDisplayParts: SymbolDisplayPart[];
+        parameters: SignatureHelpParameter[];
+        documentation: SymbolDisplayPart[];
+    }
+    /**
+     * Represents a set of signature help items, and the preferred item that should be selected.
+     */
+    interface SignatureHelpItems {
+        items: SignatureHelpItem[];
+        applicableSpan: TextSpan;
+        selectedItemIndex: number;
+        argumentIndex: number;
+        argumentCount: number;
+    }
+    interface CompletionInfo {
+        isMemberCompletion: boolean;
+        isNewIdentifierLocation: boolean;
+        entries: CompletionEntry[];
+    }
+    interface CompletionEntry {
+        name: string;
+        kind: string;
+        kindModifiers: string;
+        sortText: string;
+    }
+    interface CompletionEntryDetails {
+        name: string;
+        kind: string;
+        kindModifiers: string;
+        displayParts: SymbolDisplayPart[];
+        documentation: SymbolDisplayPart[];
+    }
+    interface OutliningSpan {
+        /** The span of the document to actually collapse. */
+        textSpan: TextSpan;
+        /** The span of the document to display when the user hovers over the collapsed span. */
+        hintSpan: TextSpan;
+        /** The text to display in the editor for the collapsed region. */
+        bannerText: string;
+        /**
+          * Whether or not this region should be automatically collapsed when
+          * the 'Collapse to Definitions' command is invoked.
+          */
+        autoCollapse: boolean;
+    }
+    interface EmitOutput {
+        outputFiles: OutputFile[];
+        emitSkipped: boolean;
+    }
+    enum OutputFileType {
+        JavaScript = 0,
+        SourceMap = 1,
+        Declaration = 2,
+    }
+    interface OutputFile {
+        name: string;
+        writeByteOrderMark: boolean;
+        text: string;
+    }
+    enum EndOfLineState {
+        None = 0,
+        InMultiLineCommentTrivia = 1,
+        InSingleQuoteStringLiteral = 2,
+        InDoubleQuoteStringLiteral = 3,
+        InTemplateHeadOrNoSubstitutionTemplate = 4,
+        InTemplateMiddleOrTail = 5,
+        InTemplateSubstitutionPosition = 6,
+    }
+    enum TokenClass {
+        Punctuation = 0,
+        Keyword = 1,
+        Operator = 2,
+        Comment = 3,
+        Whitespace = 4,
+        Identifier = 5,
+        NumberLiteral = 6,
+        StringLiteral = 7,
+        RegExpLiteral = 8,
+    }
+    interface ClassificationResult {
+        finalLexState: EndOfLineState;
+        entries: ClassificationInfo[];
+    }
+    interface ClassificationInfo {
+        length: number;
+        classification: TokenClass;
+    }
+    interface Classifier {
+        /**
+         * Gives lexical classifications of tokens on a line without any syntactic context.
+         * For instance, a token consisting of the text 'string' can be either an identifier
+         * named 'string' or the keyword 'string', however, because this classifier is not aware,
+         * it relies on certain heuristics to give acceptable results. For classifications where
+         * speed trumps accuracy, this function is preferable; however, for true accuracy, the
+         * syntactic classifier is ideal. In fact, in certain editing scenarios, combining the
+         * lexical, syntactic, and semantic classifiers may issue the best user experience.
+         *
+         * @param text                      The text of a line to classify.
+         * @param lexState                  The state of the lexical classifier at the end of the previous line.
+         * @param syntacticClassifierAbsent Whether the client is *not* using a syntactic classifier.
+         *                                  If there is no syntactic classifier (syntacticClassifierAbsent=true),
+         *                                  certain heuristics may be used in its place; however, if there is a
+         *                                  syntactic classifier (syntacticClassifierAbsent=false), certain
+         *                                  classifications which may be incorrectly categorized will be given
+         *                                  back as Identifiers in order to allow the syntactic classifier to
+         *                                  subsume the classification.
+         * @deprecated Use getLexicalClassifications instead.
+         */
+        getClassificationsForLine(text: string, lexState: EndOfLineState, syntacticClassifierAbsent: boolean): ClassificationResult;
+        getEncodedLexicalClassifications(text: string, endOfLineState: EndOfLineState, syntacticClassifierAbsent: boolean): Classifications;
+    }
+    /**
+      * The document registry represents a store of SourceFile objects that can be shared between
+      * multiple LanguageService instances. A LanguageService instance holds on the SourceFile (AST)
+      * of files in the context.
+      * SourceFile objects account for most of the memory usage by the language service. Sharing
+      * the same DocumentRegistry instance between different instances of LanguageService allow
+      * for more efficient memory utilization since all projects will share at least the library
+      * file (lib.d.ts).
+      *
+      * A more advanced use of the document registry is to serialize sourceFile objects to disk
+      * and re-hydrate them when needed.
+      *
+      * To create a default DocumentRegistry, use createDocumentRegistry to create one, and pass it
+      * to all subsequent createLanguageService calls.
+      */
+    interface DocumentRegistry {
+        /**
+          * Request a stored SourceFile with a given fileName and compilationSettings.
+          * The first call to acquire will call createLanguageServiceSourceFile to generate
+          * the SourceFile if was not found in the registry.
+          *
+          * @param fileName The name of the file requested
+          * @param compilationSettings Some compilation settings like target affects the
+          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
+          * multiple copies of the same file for different compilation settings.
+          * @parm scriptSnapshot Text of the file. Only used if the file was not found
+          * in the registry and a new one was created.
+          * @parm version Current version of the file. Only used if the file was not found
+          * in the registry and a new one was created.
+          */
+        acquireDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
+        acquireDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
+        /**
+          * Request an updated version of an already existing SourceFile with a given fileName
+          * and compilationSettings. The update will in-turn call updateLanguageServiceSourceFile
+          * to get an updated SourceFile.
+          *
+          * @param fileName The name of the file requested
+          * @param compilationSettings Some compilation settings like target affects the
+          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
+          * multiple copies of the same file for different compilation settings.
+          * @param scriptSnapshot Text of the file.
+          * @param version Current version of the file.
+          */
+        updateDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
+        updateDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
+        getKeyForCompilationSettings(settings: CompilerOptions): DocumentRegistryBucketKey;
+        /**
+          * Informs the DocumentRegistry that a file is not needed any longer.
+          *
+          * Note: It is not allowed to call release on a SourceFile that was not acquired from
+          * this registry originally.
+          *
+          * @param fileName The name of the file to be released
+          * @param compilationSettings The compilation settings used to acquire the file
+          */
+        releaseDocument(fileName: string, compilationSettings: CompilerOptions): void;
+        releaseDocumentWithKey(path: Path, key: DocumentRegistryBucketKey): void;
+        reportStats(): string;
+    }
+    type DocumentRegistryBucketKey = string & {
+        __bucketKey: any;
+    };
+    namespace ScriptElementKind {
+        const unknown: string;
+        const warning: string;
+        /** predefined type (void) or keyword (class) */
+        const keyword: string;
+        /** top level script node */
+        const scriptElement: string;
+        /** module foo {} */
+        const moduleElement: string;
+        /** class X {} */
+        const classElement: string;
+        /** var x = class X {} */
+        const localClassElement: string;
+        /** interface Y {} */
+        const interfaceElement: string;
+        /** type T = ... */
+        const typeElement: string;
+        /** enum E */
+        const enumElement: string;
+        /**
+         * Inside module and script only
+         * const v = ..
+         */
+        const variableElement: string;
+        /** Inside function */
+        const localVariableElement: string;
+        /**
+         * Inside module and script only
+         * function f() { }
+         */
+        const functionElement: string;
+        /** Inside function */
+        const localFunctionElement: string;
+        /** class X { [public|private]* foo() {} } */
+        const memberFunctionElement: string;
+        /** class X { [public|private]* [get|set] foo:number; } */
+        const memberGetAccessorElement: string;
+        const memberSetAccessorElement: string;
+        /**
+         * class X { [public|private]* foo:number; }
+         * interface Y { foo:number; }
+         */
+        const memberVariableElement: string;
+        /** class X { constructor() { } } */
+        const constructorImplementationElement: string;
+        /** interface Y { ():number; } */
+        const callSignatureElement: string;
+        /** interface Y { []:number; } */
+        const indexSignatureElement: string;
+        /** interface Y { new():Y; } */
+        const constructSignatureElement: string;
+        /** function foo(*Y*: string) */
+        const parameterElement: string;
+        const typeParameterElement: string;
+        const primitiveType: string;
+        const label: string;
+        const alias: string;
+        const constElement: string;
+        const letElement: string;
+    }
+    namespace ScriptElementKindModifier {
+        const none: string;
+        const publicMemberModifier: string;
+        const privateMemberModifier: string;
+        const protectedMemberModifier: string;
+        const exportedModifier: string;
+        const ambientModifier: string;
+        const staticModifier: string;
+        const abstractModifier: string;
+    }
+    class ClassificationTypeNames {
+        static comment: string;
+        static identifier: string;
+        static keyword: string;
+        static numericLiteral: string;
+        static operator: string;
+        static stringLiteral: string;
+        static whiteSpace: string;
+        static text: string;
+        static punctuation: string;
+        static className: string;
+        static enumName: string;
+        static interfaceName: string;
+        static moduleName: string;
+        static typeParameterName: string;
+        static typeAliasName: string;
+        static parameterName: string;
+        static docCommentTagName: string;
+        static jsxOpenTagName: string;
+        static jsxCloseTagName: string;
+        static jsxSelfClosingTagName: string;
+        static jsxAttribute: string;
+        static jsxText: string;
+        static jsxAttributeStringLiteralValue: string;
+    }
+    enum ClassificationType {
+        comment = 1,
+        identifier = 2,
+        keyword = 3,
+        numericLiteral = 4,
+        operator = 5,
+        stringLiteral = 6,
+        regularExpressionLiteral = 7,
+        whiteSpace = 8,
+        text = 9,
+        punctuation = 10,
+        className = 11,
+        enumName = 12,
+        interfaceName = 13,
+        moduleName = 14,
+        typeParameterName = 15,
+        typeAliasName = 16,
+        parameterName = 17,
+        docCommentTagName = 18,
+        jsxOpenTagName = 19,
+        jsxCloseTagName = 20,
+        jsxSelfClosingTagName = 21,
+        jsxAttribute = 22,
+        jsxText = 23,
+        jsxAttributeStringLiteralValue = 24,
+    }
+    interface DisplayPartsSymbolWriter extends SymbolWriter {
+        displayParts(): SymbolDisplayPart[];
+    }
+    function displayPartsToString(displayParts: SymbolDisplayPart[]): string;
+    function getDefaultCompilerOptions(): CompilerOptions;
+    interface TranspileOptions {
+        compilerOptions?: CompilerOptions;
+        fileName?: string;
+        reportDiagnostics?: boolean;
+        moduleName?: string;
+        renamedDependencies?: Map<string>;
+    }
+    interface TranspileOutput {
+        outputText: string;
+        diagnostics?: Diagnostic[];
+        sourceMapText?: string;
+    }
+    function transpileModule(input: string, transpileOptions: TranspileOptions): TranspileOutput;
+    function transpile(input: string, compilerOptions?: CompilerOptions, fileName?: string, diagnostics?: Diagnostic[], moduleName?: string): string;
+    function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTarget: ScriptTarget, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile;
+    let disableIncrementalParsing: boolean;
+    function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
+    function createDocumentRegistry(useCaseSensitiveFileNames?: boolean, currentDirectory?: string): DocumentRegistry;
+    function preProcessFile(sourceText: string, readImportFiles?: boolean, detectJavaScriptImports?: boolean): PreProcessedFileInfo;
+    function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry): LanguageService;
+    function createClassifier(): Classifier;
+    /**
+      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
+      * node package.
+      * The functionality is not supported if the ts module is consumed outside of a node module.
+      */
+    function getDefaultLibFilePath(options: CompilerOptions): string;
+}
 
 export = ts;
\ No newline at end of file
diff --git a/lib/typescript.js b/lib/typescript.js
index df838f8f743..9e41f640305 100644
--- a/lib/typescript.js
+++ b/lib/typescript.js
@@ -13,58314 +13,58978 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
-var __extends = (this && this.__extends) || function (d, b) {
-    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
-    function __() { this.constructor = d; }
-    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
-};
-var ts;
-(function (ts) {
-    // token > SyntaxKind.Identifer => token is a keyword
-    // Also, If you add a new SyntaxKind be sure to keep the `Markers` section at the bottom in sync
-    (function (SyntaxKind) {
-        SyntaxKind[SyntaxKind["Unknown"] = 0] = "Unknown";
-        SyntaxKind[SyntaxKind["EndOfFileToken"] = 1] = "EndOfFileToken";
-        SyntaxKind[SyntaxKind["SingleLineCommentTrivia"] = 2] = "SingleLineCommentTrivia";
-        SyntaxKind[SyntaxKind["MultiLineCommentTrivia"] = 3] = "MultiLineCommentTrivia";
-        SyntaxKind[SyntaxKind["NewLineTrivia"] = 4] = "NewLineTrivia";
-        SyntaxKind[SyntaxKind["WhitespaceTrivia"] = 5] = "WhitespaceTrivia";
-        // We detect and preserve #! on the first line
-        SyntaxKind[SyntaxKind["ShebangTrivia"] = 6] = "ShebangTrivia";
-        // We detect and provide better error recovery when we encounter a git merge marker.  This
-        // allows us to edit files with git-conflict markers in them in a much more pleasant manner.
-        SyntaxKind[SyntaxKind["ConflictMarkerTrivia"] = 7] = "ConflictMarkerTrivia";
-        // Literals
-        SyntaxKind[SyntaxKind["NumericLiteral"] = 8] = "NumericLiteral";
-        SyntaxKind[SyntaxKind["StringLiteral"] = 9] = "StringLiteral";
-        SyntaxKind[SyntaxKind["RegularExpressionLiteral"] = 10] = "RegularExpressionLiteral";
-        SyntaxKind[SyntaxKind["NoSubstitutionTemplateLiteral"] = 11] = "NoSubstitutionTemplateLiteral";
-        // Pseudo-literals
-        SyntaxKind[SyntaxKind["TemplateHead"] = 12] = "TemplateHead";
-        SyntaxKind[SyntaxKind["TemplateMiddle"] = 13] = "TemplateMiddle";
-        SyntaxKind[SyntaxKind["TemplateTail"] = 14] = "TemplateTail";
-        // Punctuation
-        SyntaxKind[SyntaxKind["OpenBraceToken"] = 15] = "OpenBraceToken";
-        SyntaxKind[SyntaxKind["CloseBraceToken"] = 16] = "CloseBraceToken";
-        SyntaxKind[SyntaxKind["OpenParenToken"] = 17] = "OpenParenToken";
-        SyntaxKind[SyntaxKind["CloseParenToken"] = 18] = "CloseParenToken";
-        SyntaxKind[SyntaxKind["OpenBracketToken"] = 19] = "OpenBracketToken";
-        SyntaxKind[SyntaxKind["CloseBracketToken"] = 20] = "CloseBracketToken";
-        SyntaxKind[SyntaxKind["DotToken"] = 21] = "DotToken";
-        SyntaxKind[SyntaxKind["DotDotDotToken"] = 22] = "DotDotDotToken";
-        SyntaxKind[SyntaxKind["SemicolonToken"] = 23] = "SemicolonToken";
-        SyntaxKind[SyntaxKind["CommaToken"] = 24] = "CommaToken";
-        SyntaxKind[SyntaxKind["LessThanToken"] = 25] = "LessThanToken";
-        SyntaxKind[SyntaxKind["LessThanSlashToken"] = 26] = "LessThanSlashToken";
-        SyntaxKind[SyntaxKind["GreaterThanToken"] = 27] = "GreaterThanToken";
-        SyntaxKind[SyntaxKind["LessThanEqualsToken"] = 28] = "LessThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanEqualsToken"] = 29] = "GreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsEqualsToken"] = 30] = "EqualsEqualsToken";
-        SyntaxKind[SyntaxKind["ExclamationEqualsToken"] = 31] = "ExclamationEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsEqualsEqualsToken"] = 32] = "EqualsEqualsEqualsToken";
-        SyntaxKind[SyntaxKind["ExclamationEqualsEqualsToken"] = 33] = "ExclamationEqualsEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsGreaterThanToken"] = 34] = "EqualsGreaterThanToken";
-        SyntaxKind[SyntaxKind["PlusToken"] = 35] = "PlusToken";
-        SyntaxKind[SyntaxKind["MinusToken"] = 36] = "MinusToken";
-        SyntaxKind[SyntaxKind["AsteriskToken"] = 37] = "AsteriskToken";
-        SyntaxKind[SyntaxKind["AsteriskAsteriskToken"] = 38] = "AsteriskAsteriskToken";
-        SyntaxKind[SyntaxKind["SlashToken"] = 39] = "SlashToken";
-        SyntaxKind[SyntaxKind["PercentToken"] = 40] = "PercentToken";
-        SyntaxKind[SyntaxKind["PlusPlusToken"] = 41] = "PlusPlusToken";
-        SyntaxKind[SyntaxKind["MinusMinusToken"] = 42] = "MinusMinusToken";
-        SyntaxKind[SyntaxKind["LessThanLessThanToken"] = 43] = "LessThanLessThanToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanToken"] = 44] = "GreaterThanGreaterThanToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanToken"] = 45] = "GreaterThanGreaterThanGreaterThanToken";
-        SyntaxKind[SyntaxKind["AmpersandToken"] = 46] = "AmpersandToken";
-        SyntaxKind[SyntaxKind["BarToken"] = 47] = "BarToken";
-        SyntaxKind[SyntaxKind["CaretToken"] = 48] = "CaretToken";
-        SyntaxKind[SyntaxKind["ExclamationToken"] = 49] = "ExclamationToken";
-        SyntaxKind[SyntaxKind["TildeToken"] = 50] = "TildeToken";
-        SyntaxKind[SyntaxKind["AmpersandAmpersandToken"] = 51] = "AmpersandAmpersandToken";
-        SyntaxKind[SyntaxKind["BarBarToken"] = 52] = "BarBarToken";
-        SyntaxKind[SyntaxKind["QuestionToken"] = 53] = "QuestionToken";
-        SyntaxKind[SyntaxKind["ColonToken"] = 54] = "ColonToken";
-        SyntaxKind[SyntaxKind["AtToken"] = 55] = "AtToken";
-        // Assignments
-        SyntaxKind[SyntaxKind["EqualsToken"] = 56] = "EqualsToken";
-        SyntaxKind[SyntaxKind["PlusEqualsToken"] = 57] = "PlusEqualsToken";
-        SyntaxKind[SyntaxKind["MinusEqualsToken"] = 58] = "MinusEqualsToken";
-        SyntaxKind[SyntaxKind["AsteriskEqualsToken"] = 59] = "AsteriskEqualsToken";
-        SyntaxKind[SyntaxKind["AsteriskAsteriskEqualsToken"] = 60] = "AsteriskAsteriskEqualsToken";
-        SyntaxKind[SyntaxKind["SlashEqualsToken"] = 61] = "SlashEqualsToken";
-        SyntaxKind[SyntaxKind["PercentEqualsToken"] = 62] = "PercentEqualsToken";
-        SyntaxKind[SyntaxKind["LessThanLessThanEqualsToken"] = 63] = "LessThanLessThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanEqualsToken"] = 64] = "GreaterThanGreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanEqualsToken"] = 65] = "GreaterThanGreaterThanGreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["AmpersandEqualsToken"] = 66] = "AmpersandEqualsToken";
-        SyntaxKind[SyntaxKind["BarEqualsToken"] = 67] = "BarEqualsToken";
-        SyntaxKind[SyntaxKind["CaretEqualsToken"] = 68] = "CaretEqualsToken";
-        // Identifiers
-        SyntaxKind[SyntaxKind["Identifier"] = 69] = "Identifier";
-        // Reserved words
-        SyntaxKind[SyntaxKind["BreakKeyword"] = 70] = "BreakKeyword";
-        SyntaxKind[SyntaxKind["CaseKeyword"] = 71] = "CaseKeyword";
-        SyntaxKind[SyntaxKind["CatchKeyword"] = 72] = "CatchKeyword";
-        SyntaxKind[SyntaxKind["ClassKeyword"] = 73] = "ClassKeyword";
-        SyntaxKind[SyntaxKind["ConstKeyword"] = 74] = "ConstKeyword";
-        SyntaxKind[SyntaxKind["ContinueKeyword"] = 75] = "ContinueKeyword";
-        SyntaxKind[SyntaxKind["DebuggerKeyword"] = 76] = "DebuggerKeyword";
-        SyntaxKind[SyntaxKind["DefaultKeyword"] = 77] = "DefaultKeyword";
-        SyntaxKind[SyntaxKind["DeleteKeyword"] = 78] = "DeleteKeyword";
-        SyntaxKind[SyntaxKind["DoKeyword"] = 79] = "DoKeyword";
-        SyntaxKind[SyntaxKind["ElseKeyword"] = 80] = "ElseKeyword";
-        SyntaxKind[SyntaxKind["EnumKeyword"] = 81] = "EnumKeyword";
-        SyntaxKind[SyntaxKind["ExportKeyword"] = 82] = "ExportKeyword";
-        SyntaxKind[SyntaxKind["ExtendsKeyword"] = 83] = "ExtendsKeyword";
-        SyntaxKind[SyntaxKind["FalseKeyword"] = 84] = "FalseKeyword";
-        SyntaxKind[SyntaxKind["FinallyKeyword"] = 85] = "FinallyKeyword";
-        SyntaxKind[SyntaxKind["ForKeyword"] = 86] = "ForKeyword";
-        SyntaxKind[SyntaxKind["FunctionKeyword"] = 87] = "FunctionKeyword";
-        SyntaxKind[SyntaxKind["IfKeyword"] = 88] = "IfKeyword";
-        SyntaxKind[SyntaxKind["ImportKeyword"] = 89] = "ImportKeyword";
-        SyntaxKind[SyntaxKind["InKeyword"] = 90] = "InKeyword";
-        SyntaxKind[SyntaxKind["InstanceOfKeyword"] = 91] = "InstanceOfKeyword";
-        SyntaxKind[SyntaxKind["NewKeyword"] = 92] = "NewKeyword";
-        SyntaxKind[SyntaxKind["NullKeyword"] = 93] = "NullKeyword";
-        SyntaxKind[SyntaxKind["ReturnKeyword"] = 94] = "ReturnKeyword";
-        SyntaxKind[SyntaxKind["SuperKeyword"] = 95] = "SuperKeyword";
-        SyntaxKind[SyntaxKind["SwitchKeyword"] = 96] = "SwitchKeyword";
-        SyntaxKind[SyntaxKind["ThisKeyword"] = 97] = "ThisKeyword";
-        SyntaxKind[SyntaxKind["ThrowKeyword"] = 98] = "ThrowKeyword";
-        SyntaxKind[SyntaxKind["TrueKeyword"] = 99] = "TrueKeyword";
-        SyntaxKind[SyntaxKind["TryKeyword"] = 100] = "TryKeyword";
-        SyntaxKind[SyntaxKind["TypeOfKeyword"] = 101] = "TypeOfKeyword";
-        SyntaxKind[SyntaxKind["VarKeyword"] = 102] = "VarKeyword";
-        SyntaxKind[SyntaxKind["VoidKeyword"] = 103] = "VoidKeyword";
-        SyntaxKind[SyntaxKind["WhileKeyword"] = 104] = "WhileKeyword";
-        SyntaxKind[SyntaxKind["WithKeyword"] = 105] = "WithKeyword";
-        // Strict mode reserved words
-        SyntaxKind[SyntaxKind["ImplementsKeyword"] = 106] = "ImplementsKeyword";
-        SyntaxKind[SyntaxKind["InterfaceKeyword"] = 107] = "InterfaceKeyword";
-        SyntaxKind[SyntaxKind["LetKeyword"] = 108] = "LetKeyword";
-        SyntaxKind[SyntaxKind["PackageKeyword"] = 109] = "PackageKeyword";
-        SyntaxKind[SyntaxKind["PrivateKeyword"] = 110] = "PrivateKeyword";
-        SyntaxKind[SyntaxKind["ProtectedKeyword"] = 111] = "ProtectedKeyword";
-        SyntaxKind[SyntaxKind["PublicKeyword"] = 112] = "PublicKeyword";
-        SyntaxKind[SyntaxKind["StaticKeyword"] = 113] = "StaticKeyword";
-        SyntaxKind[SyntaxKind["YieldKeyword"] = 114] = "YieldKeyword";
-        // Contextual keywords
-        SyntaxKind[SyntaxKind["AbstractKeyword"] = 115] = "AbstractKeyword";
-        SyntaxKind[SyntaxKind["AsKeyword"] = 116] = "AsKeyword";
-        SyntaxKind[SyntaxKind["AnyKeyword"] = 117] = "AnyKeyword";
-        SyntaxKind[SyntaxKind["AsyncKeyword"] = 118] = "AsyncKeyword";
-        SyntaxKind[SyntaxKind["AwaitKeyword"] = 119] = "AwaitKeyword";
-        SyntaxKind[SyntaxKind["BooleanKeyword"] = 120] = "BooleanKeyword";
-        SyntaxKind[SyntaxKind["ConstructorKeyword"] = 121] = "ConstructorKeyword";
-        SyntaxKind[SyntaxKind["DeclareKeyword"] = 122] = "DeclareKeyword";
-        SyntaxKind[SyntaxKind["GetKeyword"] = 123] = "GetKeyword";
-        SyntaxKind[SyntaxKind["IsKeyword"] = 124] = "IsKeyword";
-        SyntaxKind[SyntaxKind["ModuleKeyword"] = 125] = "ModuleKeyword";
-        SyntaxKind[SyntaxKind["NamespaceKeyword"] = 126] = "NamespaceKeyword";
-        SyntaxKind[SyntaxKind["NeverKeyword"] = 127] = "NeverKeyword";
-        SyntaxKind[SyntaxKind["ReadonlyKeyword"] = 128] = "ReadonlyKeyword";
-        SyntaxKind[SyntaxKind["RequireKeyword"] = 129] = "RequireKeyword";
-        SyntaxKind[SyntaxKind["NumberKeyword"] = 130] = "NumberKeyword";
-        SyntaxKind[SyntaxKind["SetKeyword"] = 131] = "SetKeyword";
-        SyntaxKind[SyntaxKind["StringKeyword"] = 132] = "StringKeyword";
-        SyntaxKind[SyntaxKind["SymbolKeyword"] = 133] = "SymbolKeyword";
-        SyntaxKind[SyntaxKind["TypeKeyword"] = 134] = "TypeKeyword";
-        SyntaxKind[SyntaxKind["UndefinedKeyword"] = 135] = "UndefinedKeyword";
-        SyntaxKind[SyntaxKind["FromKeyword"] = 136] = "FromKeyword";
-        SyntaxKind[SyntaxKind["GlobalKeyword"] = 137] = "GlobalKeyword";
-        SyntaxKind[SyntaxKind["OfKeyword"] = 138] = "OfKeyword";
-        // Parse tree nodes
-        // Names
-        SyntaxKind[SyntaxKind["QualifiedName"] = 139] = "QualifiedName";
-        SyntaxKind[SyntaxKind["ComputedPropertyName"] = 140] = "ComputedPropertyName";
-        // Signature elements
-        SyntaxKind[SyntaxKind["TypeParameter"] = 141] = "TypeParameter";
-        SyntaxKind[SyntaxKind["Parameter"] = 142] = "Parameter";
-        SyntaxKind[SyntaxKind["Decorator"] = 143] = "Decorator";
-        // TypeMember
-        SyntaxKind[SyntaxKind["PropertySignature"] = 144] = "PropertySignature";
-        SyntaxKind[SyntaxKind["PropertyDeclaration"] = 145] = "PropertyDeclaration";
-        SyntaxKind[SyntaxKind["MethodSignature"] = 146] = "MethodSignature";
-        SyntaxKind[SyntaxKind["MethodDeclaration"] = 147] = "MethodDeclaration";
-        SyntaxKind[SyntaxKind["Constructor"] = 148] = "Constructor";
-        SyntaxKind[SyntaxKind["GetAccessor"] = 149] = "GetAccessor";
-        SyntaxKind[SyntaxKind["SetAccessor"] = 150] = "SetAccessor";
-        SyntaxKind[SyntaxKind["CallSignature"] = 151] = "CallSignature";
-        SyntaxKind[SyntaxKind["ConstructSignature"] = 152] = "ConstructSignature";
-        SyntaxKind[SyntaxKind["IndexSignature"] = 153] = "IndexSignature";
-        // Type
-        SyntaxKind[SyntaxKind["TypePredicate"] = 154] = "TypePredicate";
-        SyntaxKind[SyntaxKind["TypeReference"] = 155] = "TypeReference";
-        SyntaxKind[SyntaxKind["FunctionType"] = 156] = "FunctionType";
-        SyntaxKind[SyntaxKind["ConstructorType"] = 157] = "ConstructorType";
-        SyntaxKind[SyntaxKind["TypeQuery"] = 158] = "TypeQuery";
-        SyntaxKind[SyntaxKind["TypeLiteral"] = 159] = "TypeLiteral";
-        SyntaxKind[SyntaxKind["ArrayType"] = 160] = "ArrayType";
-        SyntaxKind[SyntaxKind["TupleType"] = 161] = "TupleType";
-        SyntaxKind[SyntaxKind["UnionType"] = 162] = "UnionType";
-        SyntaxKind[SyntaxKind["IntersectionType"] = 163] = "IntersectionType";
-        SyntaxKind[SyntaxKind["ParenthesizedType"] = 164] = "ParenthesizedType";
-        SyntaxKind[SyntaxKind["ThisType"] = 165] = "ThisType";
-        SyntaxKind[SyntaxKind["StringLiteralType"] = 166] = "StringLiteralType";
-        // Binding patterns
-        SyntaxKind[SyntaxKind["ObjectBindingPattern"] = 167] = "ObjectBindingPattern";
-        SyntaxKind[SyntaxKind["ArrayBindingPattern"] = 168] = "ArrayBindingPattern";
-        SyntaxKind[SyntaxKind["BindingElement"] = 169] = "BindingElement";
-        // Expression
-        SyntaxKind[SyntaxKind["ArrayLiteralExpression"] = 170] = "ArrayLiteralExpression";
-        SyntaxKind[SyntaxKind["ObjectLiteralExpression"] = 171] = "ObjectLiteralExpression";
-        SyntaxKind[SyntaxKind["PropertyAccessExpression"] = 172] = "PropertyAccessExpression";
-        SyntaxKind[SyntaxKind["ElementAccessExpression"] = 173] = "ElementAccessExpression";
-        SyntaxKind[SyntaxKind["CallExpression"] = 174] = "CallExpression";
-        SyntaxKind[SyntaxKind["NewExpression"] = 175] = "NewExpression";
-        SyntaxKind[SyntaxKind["TaggedTemplateExpression"] = 176] = "TaggedTemplateExpression";
-        SyntaxKind[SyntaxKind["TypeAssertionExpression"] = 177] = "TypeAssertionExpression";
-        SyntaxKind[SyntaxKind["ParenthesizedExpression"] = 178] = "ParenthesizedExpression";
-        SyntaxKind[SyntaxKind["FunctionExpression"] = 179] = "FunctionExpression";
-        SyntaxKind[SyntaxKind["ArrowFunction"] = 180] = "ArrowFunction";
-        SyntaxKind[SyntaxKind["DeleteExpression"] = 181] = "DeleteExpression";
-        SyntaxKind[SyntaxKind["TypeOfExpression"] = 182] = "TypeOfExpression";
-        SyntaxKind[SyntaxKind["VoidExpression"] = 183] = "VoidExpression";
-        SyntaxKind[SyntaxKind["AwaitExpression"] = 184] = "AwaitExpression";
-        SyntaxKind[SyntaxKind["PrefixUnaryExpression"] = 185] = "PrefixUnaryExpression";
-        SyntaxKind[SyntaxKind["PostfixUnaryExpression"] = 186] = "PostfixUnaryExpression";
-        SyntaxKind[SyntaxKind["BinaryExpression"] = 187] = "BinaryExpression";
-        SyntaxKind[SyntaxKind["ConditionalExpression"] = 188] = "ConditionalExpression";
-        SyntaxKind[SyntaxKind["TemplateExpression"] = 189] = "TemplateExpression";
-        SyntaxKind[SyntaxKind["YieldExpression"] = 190] = "YieldExpression";
-        SyntaxKind[SyntaxKind["SpreadElementExpression"] = 191] = "SpreadElementExpression";
-        SyntaxKind[SyntaxKind["ClassExpression"] = 192] = "ClassExpression";
-        SyntaxKind[SyntaxKind["OmittedExpression"] = 193] = "OmittedExpression";
-        SyntaxKind[SyntaxKind["ExpressionWithTypeArguments"] = 194] = "ExpressionWithTypeArguments";
-        SyntaxKind[SyntaxKind["AsExpression"] = 195] = "AsExpression";
-        SyntaxKind[SyntaxKind["NonNullExpression"] = 196] = "NonNullExpression";
-        // Misc
-        SyntaxKind[SyntaxKind["TemplateSpan"] = 197] = "TemplateSpan";
-        SyntaxKind[SyntaxKind["SemicolonClassElement"] = 198] = "SemicolonClassElement";
-        // Element
-        SyntaxKind[SyntaxKind["Block"] = 199] = "Block";
-        SyntaxKind[SyntaxKind["VariableStatement"] = 200] = "VariableStatement";
-        SyntaxKind[SyntaxKind["EmptyStatement"] = 201] = "EmptyStatement";
-        SyntaxKind[SyntaxKind["ExpressionStatement"] = 202] = "ExpressionStatement";
-        SyntaxKind[SyntaxKind["IfStatement"] = 203] = "IfStatement";
-        SyntaxKind[SyntaxKind["DoStatement"] = 204] = "DoStatement";
-        SyntaxKind[SyntaxKind["WhileStatement"] = 205] = "WhileStatement";
-        SyntaxKind[SyntaxKind["ForStatement"] = 206] = "ForStatement";
-        SyntaxKind[SyntaxKind["ForInStatement"] = 207] = "ForInStatement";
-        SyntaxKind[SyntaxKind["ForOfStatement"] = 208] = "ForOfStatement";
-        SyntaxKind[SyntaxKind["ContinueStatement"] = 209] = "ContinueStatement";
-        SyntaxKind[SyntaxKind["BreakStatement"] = 210] = "BreakStatement";
-        SyntaxKind[SyntaxKind["ReturnStatement"] = 211] = "ReturnStatement";
-        SyntaxKind[SyntaxKind["WithStatement"] = 212] = "WithStatement";
-        SyntaxKind[SyntaxKind["SwitchStatement"] = 213] = "SwitchStatement";
-        SyntaxKind[SyntaxKind["LabeledStatement"] = 214] = "LabeledStatement";
-        SyntaxKind[SyntaxKind["ThrowStatement"] = 215] = "ThrowStatement";
-        SyntaxKind[SyntaxKind["TryStatement"] = 216] = "TryStatement";
-        SyntaxKind[SyntaxKind["DebuggerStatement"] = 217] = "DebuggerStatement";
-        SyntaxKind[SyntaxKind["VariableDeclaration"] = 218] = "VariableDeclaration";
-        SyntaxKind[SyntaxKind["VariableDeclarationList"] = 219] = "VariableDeclarationList";
-        SyntaxKind[SyntaxKind["FunctionDeclaration"] = 220] = "FunctionDeclaration";
-        SyntaxKind[SyntaxKind["ClassDeclaration"] = 221] = "ClassDeclaration";
-        SyntaxKind[SyntaxKind["InterfaceDeclaration"] = 222] = "InterfaceDeclaration";
-        SyntaxKind[SyntaxKind["TypeAliasDeclaration"] = 223] = "TypeAliasDeclaration";
-        SyntaxKind[SyntaxKind["EnumDeclaration"] = 224] = "EnumDeclaration";
-        SyntaxKind[SyntaxKind["ModuleDeclaration"] = 225] = "ModuleDeclaration";
-        SyntaxKind[SyntaxKind["ModuleBlock"] = 226] = "ModuleBlock";
-        SyntaxKind[SyntaxKind["CaseBlock"] = 227] = "CaseBlock";
-        SyntaxKind[SyntaxKind["NamespaceExportDeclaration"] = 228] = "NamespaceExportDeclaration";
-        SyntaxKind[SyntaxKind["ImportEqualsDeclaration"] = 229] = "ImportEqualsDeclaration";
-        SyntaxKind[SyntaxKind["ImportDeclaration"] = 230] = "ImportDeclaration";
-        SyntaxKind[SyntaxKind["ImportClause"] = 231] = "ImportClause";
-        SyntaxKind[SyntaxKind["NamespaceImport"] = 232] = "NamespaceImport";
-        SyntaxKind[SyntaxKind["NamedImports"] = 233] = "NamedImports";
-        SyntaxKind[SyntaxKind["ImportSpecifier"] = 234] = "ImportSpecifier";
-        SyntaxKind[SyntaxKind["ExportAssignment"] = 235] = "ExportAssignment";
-        SyntaxKind[SyntaxKind["ExportDeclaration"] = 236] = "ExportDeclaration";
-        SyntaxKind[SyntaxKind["NamedExports"] = 237] = "NamedExports";
-        SyntaxKind[SyntaxKind["ExportSpecifier"] = 238] = "ExportSpecifier";
-        SyntaxKind[SyntaxKind["MissingDeclaration"] = 239] = "MissingDeclaration";
-        // Module references
-        SyntaxKind[SyntaxKind["ExternalModuleReference"] = 240] = "ExternalModuleReference";
-        // JSX
-        SyntaxKind[SyntaxKind["JsxElement"] = 241] = "JsxElement";
-        SyntaxKind[SyntaxKind["JsxSelfClosingElement"] = 242] = "JsxSelfClosingElement";
-        SyntaxKind[SyntaxKind["JsxOpeningElement"] = 243] = "JsxOpeningElement";
-        SyntaxKind[SyntaxKind["JsxText"] = 244] = "JsxText";
-        SyntaxKind[SyntaxKind["JsxClosingElement"] = 245] = "JsxClosingElement";
-        SyntaxKind[SyntaxKind["JsxAttribute"] = 246] = "JsxAttribute";
-        SyntaxKind[SyntaxKind["JsxSpreadAttribute"] = 247] = "JsxSpreadAttribute";
-        SyntaxKind[SyntaxKind["JsxExpression"] = 248] = "JsxExpression";
-        // Clauses
-        SyntaxKind[SyntaxKind["CaseClause"] = 249] = "CaseClause";
-        SyntaxKind[SyntaxKind["DefaultClause"] = 250] = "DefaultClause";
-        SyntaxKind[SyntaxKind["HeritageClause"] = 251] = "HeritageClause";
-        SyntaxKind[SyntaxKind["CatchClause"] = 252] = "CatchClause";
-        // Property assignments
-        SyntaxKind[SyntaxKind["PropertyAssignment"] = 253] = "PropertyAssignment";
-        SyntaxKind[SyntaxKind["ShorthandPropertyAssignment"] = 254] = "ShorthandPropertyAssignment";
-        // Enum
-        SyntaxKind[SyntaxKind["EnumMember"] = 255] = "EnumMember";
-        // Top-level nodes
-        SyntaxKind[SyntaxKind["SourceFile"] = 256] = "SourceFile";
-        // JSDoc nodes
-        SyntaxKind[SyntaxKind["JSDocTypeExpression"] = 257] = "JSDocTypeExpression";
-        // The * type
-        SyntaxKind[SyntaxKind["JSDocAllType"] = 258] = "JSDocAllType";
-        // The ? type
-        SyntaxKind[SyntaxKind["JSDocUnknownType"] = 259] = "JSDocUnknownType";
-        SyntaxKind[SyntaxKind["JSDocArrayType"] = 260] = "JSDocArrayType";
-        SyntaxKind[SyntaxKind["JSDocUnionType"] = 261] = "JSDocUnionType";
-        SyntaxKind[SyntaxKind["JSDocTupleType"] = 262] = "JSDocTupleType";
-        SyntaxKind[SyntaxKind["JSDocNullableType"] = 263] = "JSDocNullableType";
-        SyntaxKind[SyntaxKind["JSDocNonNullableType"] = 264] = "JSDocNonNullableType";
-        SyntaxKind[SyntaxKind["JSDocRecordType"] = 265] = "JSDocRecordType";
-        SyntaxKind[SyntaxKind["JSDocRecordMember"] = 266] = "JSDocRecordMember";
-        SyntaxKind[SyntaxKind["JSDocTypeReference"] = 267] = "JSDocTypeReference";
-        SyntaxKind[SyntaxKind["JSDocOptionalType"] = 268] = "JSDocOptionalType";
-        SyntaxKind[SyntaxKind["JSDocFunctionType"] = 269] = "JSDocFunctionType";
-        SyntaxKind[SyntaxKind["JSDocVariadicType"] = 270] = "JSDocVariadicType";
-        SyntaxKind[SyntaxKind["JSDocConstructorType"] = 271] = "JSDocConstructorType";
-        SyntaxKind[SyntaxKind["JSDocThisType"] = 272] = "JSDocThisType";
-        SyntaxKind[SyntaxKind["JSDocComment"] = 273] = "JSDocComment";
-        SyntaxKind[SyntaxKind["JSDocTag"] = 274] = "JSDocTag";
-        SyntaxKind[SyntaxKind["JSDocParameterTag"] = 275] = "JSDocParameterTag";
-        SyntaxKind[SyntaxKind["JSDocReturnTag"] = 276] = "JSDocReturnTag";
-        SyntaxKind[SyntaxKind["JSDocTypeTag"] = 277] = "JSDocTypeTag";
-        SyntaxKind[SyntaxKind["JSDocTemplateTag"] = 278] = "JSDocTemplateTag";
-        // Synthesized list
-        SyntaxKind[SyntaxKind["SyntaxList"] = 279] = "SyntaxList";
-        // Enum value count
-        SyntaxKind[SyntaxKind["Count"] = 280] = "Count";
-        // Markers
-        SyntaxKind[SyntaxKind["FirstAssignment"] = 56] = "FirstAssignment";
-        SyntaxKind[SyntaxKind["LastAssignment"] = 68] = "LastAssignment";
-        SyntaxKind[SyntaxKind["FirstReservedWord"] = 70] = "FirstReservedWord";
-        SyntaxKind[SyntaxKind["LastReservedWord"] = 105] = "LastReservedWord";
-        SyntaxKind[SyntaxKind["FirstKeyword"] = 70] = "FirstKeyword";
-        SyntaxKind[SyntaxKind["LastKeyword"] = 138] = "LastKeyword";
-        SyntaxKind[SyntaxKind["FirstFutureReservedWord"] = 106] = "FirstFutureReservedWord";
-        SyntaxKind[SyntaxKind["LastFutureReservedWord"] = 114] = "LastFutureReservedWord";
-        SyntaxKind[SyntaxKind["FirstTypeNode"] = 154] = "FirstTypeNode";
-        SyntaxKind[SyntaxKind["LastTypeNode"] = 166] = "LastTypeNode";
-        SyntaxKind[SyntaxKind["FirstPunctuation"] = 15] = "FirstPunctuation";
-        SyntaxKind[SyntaxKind["LastPunctuation"] = 68] = "LastPunctuation";
-        SyntaxKind[SyntaxKind["FirstToken"] = 0] = "FirstToken";
-        SyntaxKind[SyntaxKind["LastToken"] = 138] = "LastToken";
-        SyntaxKind[SyntaxKind["FirstTriviaToken"] = 2] = "FirstTriviaToken";
-        SyntaxKind[SyntaxKind["LastTriviaToken"] = 7] = "LastTriviaToken";
-        SyntaxKind[SyntaxKind["FirstLiteralToken"] = 8] = "FirstLiteralToken";
-        SyntaxKind[SyntaxKind["LastLiteralToken"] = 11] = "LastLiteralToken";
-        SyntaxKind[SyntaxKind["FirstTemplateToken"] = 11] = "FirstTemplateToken";
-        SyntaxKind[SyntaxKind["LastTemplateToken"] = 14] = "LastTemplateToken";
-        SyntaxKind[SyntaxKind["FirstBinaryOperator"] = 25] = "FirstBinaryOperator";
-        SyntaxKind[SyntaxKind["LastBinaryOperator"] = 68] = "LastBinaryOperator";
-        SyntaxKind[SyntaxKind["FirstNode"] = 139] = "FirstNode";
-    })(ts.SyntaxKind || (ts.SyntaxKind = {}));
-    var SyntaxKind = ts.SyntaxKind;
-    (function (NodeFlags) {
-        NodeFlags[NodeFlags["None"] = 0] = "None";
-        NodeFlags[NodeFlags["Export"] = 1] = "Export";
-        NodeFlags[NodeFlags["Ambient"] = 2] = "Ambient";
-        NodeFlags[NodeFlags["Public"] = 4] = "Public";
-        NodeFlags[NodeFlags["Private"] = 8] = "Private";
-        NodeFlags[NodeFlags["Protected"] = 16] = "Protected";
-        NodeFlags[NodeFlags["Static"] = 32] = "Static";
-        NodeFlags[NodeFlags["Readonly"] = 64] = "Readonly";
-        NodeFlags[NodeFlags["Abstract"] = 128] = "Abstract";
-        NodeFlags[NodeFlags["Async"] = 256] = "Async";
-        NodeFlags[NodeFlags["Default"] = 512] = "Default";
-        NodeFlags[NodeFlags["Let"] = 1024] = "Let";
-        NodeFlags[NodeFlags["Const"] = 2048] = "Const";
-        NodeFlags[NodeFlags["Namespace"] = 4096] = "Namespace";
-        NodeFlags[NodeFlags["ExportContext"] = 8192] = "ExportContext";
-        NodeFlags[NodeFlags["ContainsThis"] = 16384] = "ContainsThis";
-        NodeFlags[NodeFlags["HasImplicitReturn"] = 32768] = "HasImplicitReturn";
-        NodeFlags[NodeFlags["HasExplicitReturn"] = 65536] = "HasExplicitReturn";
-        NodeFlags[NodeFlags["GlobalAugmentation"] = 131072] = "GlobalAugmentation";
-        NodeFlags[NodeFlags["HasClassExtends"] = 262144] = "HasClassExtends";
-        NodeFlags[NodeFlags["HasDecorators"] = 524288] = "HasDecorators";
-        NodeFlags[NodeFlags["HasParamDecorators"] = 1048576] = "HasParamDecorators";
-        NodeFlags[NodeFlags["HasAsyncFunctions"] = 2097152] = "HasAsyncFunctions";
-        NodeFlags[NodeFlags["DisallowInContext"] = 4194304] = "DisallowInContext";
-        NodeFlags[NodeFlags["YieldContext"] = 8388608] = "YieldContext";
-        NodeFlags[NodeFlags["DecoratorContext"] = 16777216] = "DecoratorContext";
-        NodeFlags[NodeFlags["AwaitContext"] = 33554432] = "AwaitContext";
-        NodeFlags[NodeFlags["ThisNodeHasError"] = 67108864] = "ThisNodeHasError";
-        NodeFlags[NodeFlags["JavaScriptFile"] = 134217728] = "JavaScriptFile";
-        NodeFlags[NodeFlags["ThisNodeOrAnySubNodesHasError"] = 268435456] = "ThisNodeOrAnySubNodesHasError";
-        NodeFlags[NodeFlags["HasAggregatedChildData"] = 536870912] = "HasAggregatedChildData";
-        NodeFlags[NodeFlags["HasJsxSpreadAttribute"] = 1073741824] = "HasJsxSpreadAttribute";
-        NodeFlags[NodeFlags["Modifier"] = 1023] = "Modifier";
-        NodeFlags[NodeFlags["AccessibilityModifier"] = 28] = "AccessibilityModifier";
-        // Accessibility modifiers and 'readonly' can be attached to a parameter in a constructor to make it a property.
-        NodeFlags[NodeFlags["ParameterPropertyModifier"] = 92] = "ParameterPropertyModifier";
-        NodeFlags[NodeFlags["BlockScoped"] = 3072] = "BlockScoped";
-        NodeFlags[NodeFlags["ReachabilityCheckFlags"] = 98304] = "ReachabilityCheckFlags";
-        NodeFlags[NodeFlags["EmitHelperFlags"] = 3932160] = "EmitHelperFlags";
-        // Parsing context flags
-        NodeFlags[NodeFlags["ContextFlags"] = 197132288] = "ContextFlags";
-        // Exclude these flags when parsing a Type
-        NodeFlags[NodeFlags["TypeExcludesFlags"] = 41943040] = "TypeExcludesFlags";
-    })(ts.NodeFlags || (ts.NodeFlags = {}));
-    var NodeFlags = ts.NodeFlags;
-    (function (JsxFlags) {
-        JsxFlags[JsxFlags["None"] = 0] = "None";
-        /** An element from a named property of the JSX.IntrinsicElements interface */
-        JsxFlags[JsxFlags["IntrinsicNamedElement"] = 1] = "IntrinsicNamedElement";
-        /** An element inferred from the string index signature of the JSX.IntrinsicElements interface */
-        JsxFlags[JsxFlags["IntrinsicIndexedElement"] = 2] = "IntrinsicIndexedElement";
-        JsxFlags[JsxFlags["IntrinsicElement"] = 3] = "IntrinsicElement";
-    })(ts.JsxFlags || (ts.JsxFlags = {}));
-    var JsxFlags = ts.JsxFlags;
-    /* @internal */
-    (function (RelationComparisonResult) {
-        RelationComparisonResult[RelationComparisonResult["Succeeded"] = 1] = "Succeeded";
-        RelationComparisonResult[RelationComparisonResult["Failed"] = 2] = "Failed";
-        RelationComparisonResult[RelationComparisonResult["FailedAndReported"] = 3] = "FailedAndReported";
-    })(ts.RelationComparisonResult || (ts.RelationComparisonResult = {}));
-    var RelationComparisonResult = ts.RelationComparisonResult;
-    (function (FlowFlags) {
-        FlowFlags[FlowFlags["Unreachable"] = 1] = "Unreachable";
-        FlowFlags[FlowFlags["Start"] = 2] = "Start";
-        FlowFlags[FlowFlags["BranchLabel"] = 4] = "BranchLabel";
-        FlowFlags[FlowFlags["LoopLabel"] = 8] = "LoopLabel";
-        FlowFlags[FlowFlags["Assignment"] = 16] = "Assignment";
-        FlowFlags[FlowFlags["TrueCondition"] = 32] = "TrueCondition";
-        FlowFlags[FlowFlags["FalseCondition"] = 64] = "FalseCondition";
-        FlowFlags[FlowFlags["Referenced"] = 128] = "Referenced";
-        FlowFlags[FlowFlags["Shared"] = 256] = "Shared";
-        FlowFlags[FlowFlags["Label"] = 12] = "Label";
-        FlowFlags[FlowFlags["Condition"] = 96] = "Condition";
-    })(ts.FlowFlags || (ts.FlowFlags = {}));
-    var FlowFlags = ts.FlowFlags;
-    var OperationCanceledException = (function () {
-        function OperationCanceledException() {
-        }
-        return OperationCanceledException;
-    }());
-    ts.OperationCanceledException = OperationCanceledException;
-    /** Return code used by getEmitOutput function to indicate status of the function */
-    (function (ExitStatus) {
-        // Compiler ran successfully.  Either this was a simple do-nothing compilation (for example,
-        // when -version or -help was provided, or this was a normal compilation, no diagnostics
-        // were produced, and all outputs were generated successfully.
-        ExitStatus[ExitStatus["Success"] = 0] = "Success";
-        // Diagnostics were produced and because of them no code was generated.
-        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
-        // Diagnostics were produced and outputs were generated in spite of them.
-        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
-    })(ts.ExitStatus || (ts.ExitStatus = {}));
-    var ExitStatus = ts.ExitStatus;
-    (function (TypeFormatFlags) {
-        TypeFormatFlags[TypeFormatFlags["None"] = 0] = "None";
-        TypeFormatFlags[TypeFormatFlags["WriteArrayAsGenericType"] = 1] = "WriteArrayAsGenericType";
-        TypeFormatFlags[TypeFormatFlags["UseTypeOfFunction"] = 2] = "UseTypeOfFunction";
-        TypeFormatFlags[TypeFormatFlags["NoTruncation"] = 4] = "NoTruncation";
-        TypeFormatFlags[TypeFormatFlags["WriteArrowStyleSignature"] = 8] = "WriteArrowStyleSignature";
-        TypeFormatFlags[TypeFormatFlags["WriteOwnNameForAnyLike"] = 16] = "WriteOwnNameForAnyLike";
-        TypeFormatFlags[TypeFormatFlags["WriteTypeArgumentsOfSignature"] = 32] = "WriteTypeArgumentsOfSignature";
-        TypeFormatFlags[TypeFormatFlags["InElementType"] = 64] = "InElementType";
-        TypeFormatFlags[TypeFormatFlags["UseFullyQualifiedType"] = 128] = "UseFullyQualifiedType";
-        TypeFormatFlags[TypeFormatFlags["InFirstTypeArgument"] = 256] = "InFirstTypeArgument";
-    })(ts.TypeFormatFlags || (ts.TypeFormatFlags = {}));
-    var TypeFormatFlags = ts.TypeFormatFlags;
-    (function (SymbolFormatFlags) {
-        SymbolFormatFlags[SymbolFormatFlags["None"] = 0] = "None";
-        // Write symbols's type argument if it is instantiated symbol
-        // eg. class C<T> { p: T }   <-- Show p as C<T>.p here
-        //     var a: C<number>;
-        //     var p = a.p;  <--- Here p is property of C<number> so show it as C<number>.p instead of just C.p
-        SymbolFormatFlags[SymbolFormatFlags["WriteTypeParametersOrArguments"] = 1] = "WriteTypeParametersOrArguments";
-        // Use only external alias information to get the symbol name in the given context
-        // eg.  module m { export class c { } } import x = m.c;
-        // When this flag is specified m.c will be used to refer to the class instead of alias symbol x
-        SymbolFormatFlags[SymbolFormatFlags["UseOnlyExternalAliasing"] = 2] = "UseOnlyExternalAliasing";
-    })(ts.SymbolFormatFlags || (ts.SymbolFormatFlags = {}));
-    var SymbolFormatFlags = ts.SymbolFormatFlags;
-    /* @internal */
-    (function (SymbolAccessibility) {
-        SymbolAccessibility[SymbolAccessibility["Accessible"] = 0] = "Accessible";
-        SymbolAccessibility[SymbolAccessibility["NotAccessible"] = 1] = "NotAccessible";
-        SymbolAccessibility[SymbolAccessibility["CannotBeNamed"] = 2] = "CannotBeNamed";
-    })(ts.SymbolAccessibility || (ts.SymbolAccessibility = {}));
-    var SymbolAccessibility = ts.SymbolAccessibility;
-    (function (TypePredicateKind) {
-        TypePredicateKind[TypePredicateKind["This"] = 0] = "This";
-        TypePredicateKind[TypePredicateKind["Identifier"] = 1] = "Identifier";
-    })(ts.TypePredicateKind || (ts.TypePredicateKind = {}));
-    var TypePredicateKind = ts.TypePredicateKind;
-    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator
-      * metadata */
-    /* @internal */
-    (function (TypeReferenceSerializationKind) {
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
-        // should be emitted using a safe fallback.
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithConstructSignatureAndValue"] = 1] = "TypeWithConstructSignatureAndValue";
-        // function that can be reached at runtime (e.g. a `class`
-        // declaration or a `var` declaration for the static side
-        // of a type, such as the global `Promise` type in lib.d.ts).
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["VoidType"] = 2] = "VoidType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["NumberLikeType"] = 3] = "NumberLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["StringLikeType"] = 4] = "StringLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["BooleanType"] = 5] = "BooleanType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ArrayLikeType"] = 6] = "ArrayLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ESSymbolType"] = 7] = "ESSymbolType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 8] = "TypeWithCallSignature";
-        // with call signatures.
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 9] = "ObjectType";
-    })(ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
-    var TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind;
-    (function (SymbolFlags) {
-        SymbolFlags[SymbolFlags["None"] = 0] = "None";
-        SymbolFlags[SymbolFlags["FunctionScopedVariable"] = 1] = "FunctionScopedVariable";
-        SymbolFlags[SymbolFlags["BlockScopedVariable"] = 2] = "BlockScopedVariable";
-        SymbolFlags[SymbolFlags["Property"] = 4] = "Property";
-        SymbolFlags[SymbolFlags["EnumMember"] = 8] = "EnumMember";
-        SymbolFlags[SymbolFlags["Function"] = 16] = "Function";
-        SymbolFlags[SymbolFlags["Class"] = 32] = "Class";
-        SymbolFlags[SymbolFlags["Interface"] = 64] = "Interface";
-        SymbolFlags[SymbolFlags["ConstEnum"] = 128] = "ConstEnum";
-        SymbolFlags[SymbolFlags["RegularEnum"] = 256] = "RegularEnum";
-        SymbolFlags[SymbolFlags["ValueModule"] = 512] = "ValueModule";
-        SymbolFlags[SymbolFlags["NamespaceModule"] = 1024] = "NamespaceModule";
-        SymbolFlags[SymbolFlags["TypeLiteral"] = 2048] = "TypeLiteral";
-        SymbolFlags[SymbolFlags["ObjectLiteral"] = 4096] = "ObjectLiteral";
-        SymbolFlags[SymbolFlags["Method"] = 8192] = "Method";
-        SymbolFlags[SymbolFlags["Constructor"] = 16384] = "Constructor";
-        SymbolFlags[SymbolFlags["GetAccessor"] = 32768] = "GetAccessor";
-        SymbolFlags[SymbolFlags["SetAccessor"] = 65536] = "SetAccessor";
-        SymbolFlags[SymbolFlags["Signature"] = 131072] = "Signature";
-        SymbolFlags[SymbolFlags["TypeParameter"] = 262144] = "TypeParameter";
-        SymbolFlags[SymbolFlags["TypeAlias"] = 524288] = "TypeAlias";
-        SymbolFlags[SymbolFlags["ExportValue"] = 1048576] = "ExportValue";
-        SymbolFlags[SymbolFlags["ExportType"] = 2097152] = "ExportType";
-        SymbolFlags[SymbolFlags["ExportNamespace"] = 4194304] = "ExportNamespace";
-        SymbolFlags[SymbolFlags["Alias"] = 8388608] = "Alias";
-        SymbolFlags[SymbolFlags["Instantiated"] = 16777216] = "Instantiated";
-        SymbolFlags[SymbolFlags["Merged"] = 33554432] = "Merged";
-        SymbolFlags[SymbolFlags["Transient"] = 67108864] = "Transient";
-        SymbolFlags[SymbolFlags["Prototype"] = 134217728] = "Prototype";
-        SymbolFlags[SymbolFlags["SyntheticProperty"] = 268435456] = "SyntheticProperty";
-        SymbolFlags[SymbolFlags["Optional"] = 536870912] = "Optional";
-        SymbolFlags[SymbolFlags["ExportStar"] = 1073741824] = "ExportStar";
-        SymbolFlags[SymbolFlags["Enum"] = 384] = "Enum";
-        SymbolFlags[SymbolFlags["Variable"] = 3] = "Variable";
-        SymbolFlags[SymbolFlags["Value"] = 107455] = "Value";
-        SymbolFlags[SymbolFlags["Type"] = 793056] = "Type";
-        SymbolFlags[SymbolFlags["Namespace"] = 1536] = "Namespace";
-        SymbolFlags[SymbolFlags["Module"] = 1536] = "Module";
-        SymbolFlags[SymbolFlags["Accessor"] = 98304] = "Accessor";
-        // Variables can be redeclared, but can not redeclare a block-scoped declaration with the
-        // same name, or any other value that is not a variable, e.g. ValueModule or Class
-        SymbolFlags[SymbolFlags["FunctionScopedVariableExcludes"] = 107454] = "FunctionScopedVariableExcludes";
-        // Block-scoped declarations are not allowed to be re-declared
-        // they can not merge with anything in the value space
-        SymbolFlags[SymbolFlags["BlockScopedVariableExcludes"] = 107455] = "BlockScopedVariableExcludes";
-        SymbolFlags[SymbolFlags["ParameterExcludes"] = 107455] = "ParameterExcludes";
-        SymbolFlags[SymbolFlags["PropertyExcludes"] = 0] = "PropertyExcludes";
-        SymbolFlags[SymbolFlags["EnumMemberExcludes"] = 107455] = "EnumMemberExcludes";
-        SymbolFlags[SymbolFlags["FunctionExcludes"] = 106927] = "FunctionExcludes";
-        SymbolFlags[SymbolFlags["ClassExcludes"] = 899519] = "ClassExcludes";
-        SymbolFlags[SymbolFlags["InterfaceExcludes"] = 792960] = "InterfaceExcludes";
-        SymbolFlags[SymbolFlags["RegularEnumExcludes"] = 899327] = "RegularEnumExcludes";
-        SymbolFlags[SymbolFlags["ConstEnumExcludes"] = 899967] = "ConstEnumExcludes";
-        SymbolFlags[SymbolFlags["ValueModuleExcludes"] = 106639] = "ValueModuleExcludes";
-        SymbolFlags[SymbolFlags["NamespaceModuleExcludes"] = 0] = "NamespaceModuleExcludes";
-        SymbolFlags[SymbolFlags["MethodExcludes"] = 99263] = "MethodExcludes";
-        SymbolFlags[SymbolFlags["GetAccessorExcludes"] = 41919] = "GetAccessorExcludes";
-        SymbolFlags[SymbolFlags["SetAccessorExcludes"] = 74687] = "SetAccessorExcludes";
-        SymbolFlags[SymbolFlags["TypeParameterExcludes"] = 530912] = "TypeParameterExcludes";
-        SymbolFlags[SymbolFlags["TypeAliasExcludes"] = 793056] = "TypeAliasExcludes";
-        SymbolFlags[SymbolFlags["AliasExcludes"] = 8388608] = "AliasExcludes";
-        SymbolFlags[SymbolFlags["ModuleMember"] = 8914931] = "ModuleMember";
-        SymbolFlags[SymbolFlags["ExportHasLocal"] = 944] = "ExportHasLocal";
-        SymbolFlags[SymbolFlags["HasExports"] = 1952] = "HasExports";
-        SymbolFlags[SymbolFlags["HasMembers"] = 6240] = "HasMembers";
-        SymbolFlags[SymbolFlags["BlockScoped"] = 418] = "BlockScoped";
-        SymbolFlags[SymbolFlags["PropertyOrAccessor"] = 98308] = "PropertyOrAccessor";
-        SymbolFlags[SymbolFlags["Export"] = 7340032] = "Export";
-        /* @internal */
-        // The set of things we consider semantically classifiable.  Used to speed up the LS during
-        // classification.
-        SymbolFlags[SymbolFlags["Classifiable"] = 788448] = "Classifiable";
-    })(ts.SymbolFlags || (ts.SymbolFlags = {}));
-    var SymbolFlags = ts.SymbolFlags;
-    /* @internal */
-    (function (NodeCheckFlags) {
-        NodeCheckFlags[NodeCheckFlags["TypeChecked"] = 1] = "TypeChecked";
-        NodeCheckFlags[NodeCheckFlags["LexicalThis"] = 2] = "LexicalThis";
-        NodeCheckFlags[NodeCheckFlags["CaptureThis"] = 4] = "CaptureThis";
-        NodeCheckFlags[NodeCheckFlags["SuperInstance"] = 256] = "SuperInstance";
-        NodeCheckFlags[NodeCheckFlags["SuperStatic"] = 512] = "SuperStatic";
-        NodeCheckFlags[NodeCheckFlags["ContextChecked"] = 1024] = "ContextChecked";
-        NodeCheckFlags[NodeCheckFlags["AsyncMethodWithSuper"] = 2048] = "AsyncMethodWithSuper";
-        NodeCheckFlags[NodeCheckFlags["AsyncMethodWithSuperBinding"] = 4096] = "AsyncMethodWithSuperBinding";
-        NodeCheckFlags[NodeCheckFlags["CaptureArguments"] = 8192] = "CaptureArguments";
-        NodeCheckFlags[NodeCheckFlags["EnumValuesComputed"] = 16384] = "EnumValuesComputed";
-        NodeCheckFlags[NodeCheckFlags["LexicalModuleMergesWithClass"] = 32768] = "LexicalModuleMergesWithClass";
-        NodeCheckFlags[NodeCheckFlags["LoopWithCapturedBlockScopedBinding"] = 65536] = "LoopWithCapturedBlockScopedBinding";
-        NodeCheckFlags[NodeCheckFlags["CapturedBlockScopedBinding"] = 131072] = "CapturedBlockScopedBinding";
-        NodeCheckFlags[NodeCheckFlags["BlockScopedBindingInLoop"] = 262144] = "BlockScopedBindingInLoop";
-        NodeCheckFlags[NodeCheckFlags["ClassWithBodyScopedClassBinding"] = 524288] = "ClassWithBodyScopedClassBinding";
-        NodeCheckFlags[NodeCheckFlags["BodyScopedClassBinding"] = 1048576] = "BodyScopedClassBinding";
-        NodeCheckFlags[NodeCheckFlags["NeedsLoopOutParameter"] = 2097152] = "NeedsLoopOutParameter";
-    })(ts.NodeCheckFlags || (ts.NodeCheckFlags = {}));
-    var NodeCheckFlags = ts.NodeCheckFlags;
-    (function (TypeFlags) {
-        TypeFlags[TypeFlags["Any"] = 1] = "Any";
-        TypeFlags[TypeFlags["String"] = 2] = "String";
-        TypeFlags[TypeFlags["Number"] = 4] = "Number";
-        TypeFlags[TypeFlags["Boolean"] = 8] = "Boolean";
-        TypeFlags[TypeFlags["Void"] = 16] = "Void";
-        TypeFlags[TypeFlags["Undefined"] = 32] = "Undefined";
-        TypeFlags[TypeFlags["Null"] = 64] = "Null";
-        TypeFlags[TypeFlags["Enum"] = 128] = "Enum";
-        TypeFlags[TypeFlags["StringLiteral"] = 256] = "StringLiteral";
-        TypeFlags[TypeFlags["TypeParameter"] = 512] = "TypeParameter";
-        TypeFlags[TypeFlags["Class"] = 1024] = "Class";
-        TypeFlags[TypeFlags["Interface"] = 2048] = "Interface";
-        TypeFlags[TypeFlags["Reference"] = 4096] = "Reference";
-        TypeFlags[TypeFlags["Tuple"] = 8192] = "Tuple";
-        TypeFlags[TypeFlags["Union"] = 16384] = "Union";
-        TypeFlags[TypeFlags["Intersection"] = 32768] = "Intersection";
-        TypeFlags[TypeFlags["Anonymous"] = 65536] = "Anonymous";
-        TypeFlags[TypeFlags["Instantiated"] = 131072] = "Instantiated";
-        /* @internal */
-        TypeFlags[TypeFlags["FromSignature"] = 262144] = "FromSignature";
-        TypeFlags[TypeFlags["ObjectLiteral"] = 524288] = "ObjectLiteral";
-        /* @internal */
-        TypeFlags[TypeFlags["FreshObjectLiteral"] = 1048576] = "FreshObjectLiteral";
-        /* @internal */
-        TypeFlags[TypeFlags["ContainsUndefinedOrNull"] = 2097152] = "ContainsUndefinedOrNull";
-        /* @internal */
-        TypeFlags[TypeFlags["ContainsObjectLiteral"] = 4194304] = "ContainsObjectLiteral";
-        /* @internal */
-        TypeFlags[TypeFlags["ContainsAnyFunctionType"] = 8388608] = "ContainsAnyFunctionType";
-        TypeFlags[TypeFlags["ESSymbol"] = 16777216] = "ESSymbol";
-        TypeFlags[TypeFlags["ThisType"] = 33554432] = "ThisType";
-        TypeFlags[TypeFlags["ObjectLiteralPatternWithComputedProperties"] = 67108864] = "ObjectLiteralPatternWithComputedProperties";
-        TypeFlags[TypeFlags["Never"] = 134217728] = "Never";
-        /* @internal */
-        TypeFlags[TypeFlags["Nullable"] = 96] = "Nullable";
-        /* @internal */
-        TypeFlags[TypeFlags["Intrinsic"] = 150995071] = "Intrinsic";
-        /* @internal */
-        TypeFlags[TypeFlags["Primitive"] = 16777726] = "Primitive";
-        TypeFlags[TypeFlags["StringLike"] = 258] = "StringLike";
-        TypeFlags[TypeFlags["NumberLike"] = 132] = "NumberLike";
-        TypeFlags[TypeFlags["ObjectType"] = 80896] = "ObjectType";
-        TypeFlags[TypeFlags["UnionOrIntersection"] = 49152] = "UnionOrIntersection";
-        TypeFlags[TypeFlags["StructuredType"] = 130048] = "StructuredType";
-        TypeFlags[TypeFlags["Narrowable"] = 97793] = "Narrowable";
-        /* @internal */
-        TypeFlags[TypeFlags["RequiresWidening"] = 6291456] = "RequiresWidening";
-        /* @internal */
-        TypeFlags[TypeFlags["PropagatingFlags"] = 14680064] = "PropagatingFlags";
-    })(ts.TypeFlags || (ts.TypeFlags = {}));
-    var TypeFlags = ts.TypeFlags;
-    (function (SignatureKind) {
-        SignatureKind[SignatureKind["Call"] = 0] = "Call";
-        SignatureKind[SignatureKind["Construct"] = 1] = "Construct";
-    })(ts.SignatureKind || (ts.SignatureKind = {}));
-    var SignatureKind = ts.SignatureKind;
-    (function (IndexKind) {
-        IndexKind[IndexKind["String"] = 0] = "String";
-        IndexKind[IndexKind["Number"] = 1] = "Number";
-    })(ts.IndexKind || (ts.IndexKind = {}));
-    var IndexKind = ts.IndexKind;
-    /* @internal */
-    (function (SpecialPropertyAssignmentKind) {
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["None"] = 0] = "None";
-        /// exports.name = expr
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ExportsProperty"] = 1] = "ExportsProperty";
-        /// module.exports = expr
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ModuleExports"] = 2] = "ModuleExports";
-        /// className.prototype.name = expr
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["PrototypeProperty"] = 3] = "PrototypeProperty";
-        /// this.name = expr
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ThisProperty"] = 4] = "ThisProperty";
-    })(ts.SpecialPropertyAssignmentKind || (ts.SpecialPropertyAssignmentKind = {}));
-    var SpecialPropertyAssignmentKind = ts.SpecialPropertyAssignmentKind;
-    (function (DiagnosticCategory) {
-        DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
-        DiagnosticCategory[DiagnosticCategory["Error"] = 1] = "Error";
-        DiagnosticCategory[DiagnosticCategory["Message"] = 2] = "Message";
-    })(ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
-    var DiagnosticCategory = ts.DiagnosticCategory;
-    (function (ModuleResolutionKind) {
-        ModuleResolutionKind[ModuleResolutionKind["Classic"] = 1] = "Classic";
-        ModuleResolutionKind[ModuleResolutionKind["NodeJs"] = 2] = "NodeJs";
-    })(ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
-    var ModuleResolutionKind = ts.ModuleResolutionKind;
-    (function (ModuleKind) {
-        ModuleKind[ModuleKind["None"] = 0] = "None";
-        ModuleKind[ModuleKind["CommonJS"] = 1] = "CommonJS";
-        ModuleKind[ModuleKind["AMD"] = 2] = "AMD";
-        ModuleKind[ModuleKind["UMD"] = 3] = "UMD";
-        ModuleKind[ModuleKind["System"] = 4] = "System";
-        ModuleKind[ModuleKind["ES6"] = 5] = "ES6";
-        ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
-    })(ts.ModuleKind || (ts.ModuleKind = {}));
-    var ModuleKind = ts.ModuleKind;
-    (function (JsxEmit) {
-        JsxEmit[JsxEmit["None"] = 0] = "None";
-        JsxEmit[JsxEmit["Preserve"] = 1] = "Preserve";
-        JsxEmit[JsxEmit["React"] = 2] = "React";
-    })(ts.JsxEmit || (ts.JsxEmit = {}));
-    var JsxEmit = ts.JsxEmit;
-    (function (NewLineKind) {
-        NewLineKind[NewLineKind["CarriageReturnLineFeed"] = 0] = "CarriageReturnLineFeed";
-        NewLineKind[NewLineKind["LineFeed"] = 1] = "LineFeed";
-    })(ts.NewLineKind || (ts.NewLineKind = {}));
-    var NewLineKind = ts.NewLineKind;
-    (function (ScriptKind) {
-        ScriptKind[ScriptKind["Unknown"] = 0] = "Unknown";
-        ScriptKind[ScriptKind["JS"] = 1] = "JS";
-        ScriptKind[ScriptKind["JSX"] = 2] = "JSX";
-        ScriptKind[ScriptKind["TS"] = 3] = "TS";
-        ScriptKind[ScriptKind["TSX"] = 4] = "TSX";
-    })(ts.ScriptKind || (ts.ScriptKind = {}));
-    var ScriptKind = ts.ScriptKind;
-    (function (ScriptTarget) {
-        ScriptTarget[ScriptTarget["ES3"] = 0] = "ES3";
-        ScriptTarget[ScriptTarget["ES5"] = 1] = "ES5";
-        ScriptTarget[ScriptTarget["ES6"] = 2] = "ES6";
-        ScriptTarget[ScriptTarget["ES2015"] = 2] = "ES2015";
-        ScriptTarget[ScriptTarget["Latest"] = 2] = "Latest";
-    })(ts.ScriptTarget || (ts.ScriptTarget = {}));
-    var ScriptTarget = ts.ScriptTarget;
-    (function (LanguageVariant) {
-        LanguageVariant[LanguageVariant["Standard"] = 0] = "Standard";
-        LanguageVariant[LanguageVariant["JSX"] = 1] = "JSX";
-    })(ts.LanguageVariant || (ts.LanguageVariant = {}));
-    var LanguageVariant = ts.LanguageVariant;
-    /* @internal */
-    (function (DiagnosticStyle) {
-        DiagnosticStyle[DiagnosticStyle["Simple"] = 0] = "Simple";
-        DiagnosticStyle[DiagnosticStyle["Pretty"] = 1] = "Pretty";
-    })(ts.DiagnosticStyle || (ts.DiagnosticStyle = {}));
-    var DiagnosticStyle = ts.DiagnosticStyle;
-    /* @internal */
-    (function (CharacterCodes) {
-        CharacterCodes[CharacterCodes["nullCharacter"] = 0] = "nullCharacter";
-        CharacterCodes[CharacterCodes["maxAsciiCharacter"] = 127] = "maxAsciiCharacter";
-        CharacterCodes[CharacterCodes["lineFeed"] = 10] = "lineFeed";
-        CharacterCodes[CharacterCodes["carriageReturn"] = 13] = "carriageReturn";
-        CharacterCodes[CharacterCodes["lineSeparator"] = 8232] = "lineSeparator";
-        CharacterCodes[CharacterCodes["paragraphSeparator"] = 8233] = "paragraphSeparator";
-        CharacterCodes[CharacterCodes["nextLine"] = 133] = "nextLine";
-        // Unicode 3.0 space characters
-        CharacterCodes[CharacterCodes["space"] = 32] = "space";
-        CharacterCodes[CharacterCodes["nonBreakingSpace"] = 160] = "nonBreakingSpace";
-        CharacterCodes[CharacterCodes["enQuad"] = 8192] = "enQuad";
-        CharacterCodes[CharacterCodes["emQuad"] = 8193] = "emQuad";
-        CharacterCodes[CharacterCodes["enSpace"] = 8194] = "enSpace";
-        CharacterCodes[CharacterCodes["emSpace"] = 8195] = "emSpace";
-        CharacterCodes[CharacterCodes["threePerEmSpace"] = 8196] = "threePerEmSpace";
-        CharacterCodes[CharacterCodes["fourPerEmSpace"] = 8197] = "fourPerEmSpace";
-        CharacterCodes[CharacterCodes["sixPerEmSpace"] = 8198] = "sixPerEmSpace";
-        CharacterCodes[CharacterCodes["figureSpace"] = 8199] = "figureSpace";
-        CharacterCodes[CharacterCodes["punctuationSpace"] = 8200] = "punctuationSpace";
-        CharacterCodes[CharacterCodes["thinSpace"] = 8201] = "thinSpace";
-        CharacterCodes[CharacterCodes["hairSpace"] = 8202] = "hairSpace";
-        CharacterCodes[CharacterCodes["zeroWidthSpace"] = 8203] = "zeroWidthSpace";
-        CharacterCodes[CharacterCodes["narrowNoBreakSpace"] = 8239] = "narrowNoBreakSpace";
-        CharacterCodes[CharacterCodes["ideographicSpace"] = 12288] = "ideographicSpace";
-        CharacterCodes[CharacterCodes["mathematicalSpace"] = 8287] = "mathematicalSpace";
-        CharacterCodes[CharacterCodes["ogham"] = 5760] = "ogham";
-        CharacterCodes[CharacterCodes["_"] = 95] = "_";
-        CharacterCodes[CharacterCodes["$"] = 36] = "$";
-        CharacterCodes[CharacterCodes["_0"] = 48] = "_0";
-        CharacterCodes[CharacterCodes["_1"] = 49] = "_1";
-        CharacterCodes[CharacterCodes["_2"] = 50] = "_2";
-        CharacterCodes[CharacterCodes["_3"] = 51] = "_3";
-        CharacterCodes[CharacterCodes["_4"] = 52] = "_4";
-        CharacterCodes[CharacterCodes["_5"] = 53] = "_5";
-        CharacterCodes[CharacterCodes["_6"] = 54] = "_6";
-        CharacterCodes[CharacterCodes["_7"] = 55] = "_7";
-        CharacterCodes[CharacterCodes["_8"] = 56] = "_8";
-        CharacterCodes[CharacterCodes["_9"] = 57] = "_9";
-        CharacterCodes[CharacterCodes["a"] = 97] = "a";
-        CharacterCodes[CharacterCodes["b"] = 98] = "b";
-        CharacterCodes[CharacterCodes["c"] = 99] = "c";
-        CharacterCodes[CharacterCodes["d"] = 100] = "d";
-        CharacterCodes[CharacterCodes["e"] = 101] = "e";
-        CharacterCodes[CharacterCodes["f"] = 102] = "f";
-        CharacterCodes[CharacterCodes["g"] = 103] = "g";
-        CharacterCodes[CharacterCodes["h"] = 104] = "h";
-        CharacterCodes[CharacterCodes["i"] = 105] = "i";
-        CharacterCodes[CharacterCodes["j"] = 106] = "j";
-        CharacterCodes[CharacterCodes["k"] = 107] = "k";
-        CharacterCodes[CharacterCodes["l"] = 108] = "l";
-        CharacterCodes[CharacterCodes["m"] = 109] = "m";
-        CharacterCodes[CharacterCodes["n"] = 110] = "n";
-        CharacterCodes[CharacterCodes["o"] = 111] = "o";
-        CharacterCodes[CharacterCodes["p"] = 112] = "p";
-        CharacterCodes[CharacterCodes["q"] = 113] = "q";
-        CharacterCodes[CharacterCodes["r"] = 114] = "r";
-        CharacterCodes[CharacterCodes["s"] = 115] = "s";
-        CharacterCodes[CharacterCodes["t"] = 116] = "t";
-        CharacterCodes[CharacterCodes["u"] = 117] = "u";
-        CharacterCodes[CharacterCodes["v"] = 118] = "v";
-        CharacterCodes[CharacterCodes["w"] = 119] = "w";
-        CharacterCodes[CharacterCodes["x"] = 120] = "x";
-        CharacterCodes[CharacterCodes["y"] = 121] = "y";
-        CharacterCodes[CharacterCodes["z"] = 122] = "z";
-        CharacterCodes[CharacterCodes["A"] = 65] = "A";
-        CharacterCodes[CharacterCodes["B"] = 66] = "B";
-        CharacterCodes[CharacterCodes["C"] = 67] = "C";
-        CharacterCodes[CharacterCodes["D"] = 68] = "D";
-        CharacterCodes[CharacterCodes["E"] = 69] = "E";
-        CharacterCodes[CharacterCodes["F"] = 70] = "F";
-        CharacterCodes[CharacterCodes["G"] = 71] = "G";
-        CharacterCodes[CharacterCodes["H"] = 72] = "H";
-        CharacterCodes[CharacterCodes["I"] = 73] = "I";
-        CharacterCodes[CharacterCodes["J"] = 74] = "J";
-        CharacterCodes[CharacterCodes["K"] = 75] = "K";
-        CharacterCodes[CharacterCodes["L"] = 76] = "L";
-        CharacterCodes[CharacterCodes["M"] = 77] = "M";
-        CharacterCodes[CharacterCodes["N"] = 78] = "N";
-        CharacterCodes[CharacterCodes["O"] = 79] = "O";
-        CharacterCodes[CharacterCodes["P"] = 80] = "P";
-        CharacterCodes[CharacterCodes["Q"] = 81] = "Q";
-        CharacterCodes[CharacterCodes["R"] = 82] = "R";
-        CharacterCodes[CharacterCodes["S"] = 83] = "S";
-        CharacterCodes[CharacterCodes["T"] = 84] = "T";
-        CharacterCodes[CharacterCodes["U"] = 85] = "U";
-        CharacterCodes[CharacterCodes["V"] = 86] = "V";
-        CharacterCodes[CharacterCodes["W"] = 87] = "W";
-        CharacterCodes[CharacterCodes["X"] = 88] = "X";
-        CharacterCodes[CharacterCodes["Y"] = 89] = "Y";
-        CharacterCodes[CharacterCodes["Z"] = 90] = "Z";
-        CharacterCodes[CharacterCodes["ampersand"] = 38] = "ampersand";
-        CharacterCodes[CharacterCodes["asterisk"] = 42] = "asterisk";
-        CharacterCodes[CharacterCodes["at"] = 64] = "at";
-        CharacterCodes[CharacterCodes["backslash"] = 92] = "backslash";
-        CharacterCodes[CharacterCodes["backtick"] = 96] = "backtick";
-        CharacterCodes[CharacterCodes["bar"] = 124] = "bar";
-        CharacterCodes[CharacterCodes["caret"] = 94] = "caret";
-        CharacterCodes[CharacterCodes["closeBrace"] = 125] = "closeBrace";
-        CharacterCodes[CharacterCodes["closeBracket"] = 93] = "closeBracket";
-        CharacterCodes[CharacterCodes["closeParen"] = 41] = "closeParen";
-        CharacterCodes[CharacterCodes["colon"] = 58] = "colon";
-        CharacterCodes[CharacterCodes["comma"] = 44] = "comma";
-        CharacterCodes[CharacterCodes["dot"] = 46] = "dot";
-        CharacterCodes[CharacterCodes["doubleQuote"] = 34] = "doubleQuote";
-        CharacterCodes[CharacterCodes["equals"] = 61] = "equals";
-        CharacterCodes[CharacterCodes["exclamation"] = 33] = "exclamation";
-        CharacterCodes[CharacterCodes["greaterThan"] = 62] = "greaterThan";
-        CharacterCodes[CharacterCodes["hash"] = 35] = "hash";
-        CharacterCodes[CharacterCodes["lessThan"] = 60] = "lessThan";
-        CharacterCodes[CharacterCodes["minus"] = 45] = "minus";
-        CharacterCodes[CharacterCodes["openBrace"] = 123] = "openBrace";
-        CharacterCodes[CharacterCodes["openBracket"] = 91] = "openBracket";
-        CharacterCodes[CharacterCodes["openParen"] = 40] = "openParen";
-        CharacterCodes[CharacterCodes["percent"] = 37] = "percent";
-        CharacterCodes[CharacterCodes["plus"] = 43] = "plus";
-        CharacterCodes[CharacterCodes["question"] = 63] = "question";
-        CharacterCodes[CharacterCodes["semicolon"] = 59] = "semicolon";
-        CharacterCodes[CharacterCodes["singleQuote"] = 39] = "singleQuote";
-        CharacterCodes[CharacterCodes["slash"] = 47] = "slash";
-        CharacterCodes[CharacterCodes["tilde"] = 126] = "tilde";
-        CharacterCodes[CharacterCodes["backspace"] = 8] = "backspace";
-        CharacterCodes[CharacterCodes["formFeed"] = 12] = "formFeed";
-        CharacterCodes[CharacterCodes["byteOrderMark"] = 65279] = "byteOrderMark";
-        CharacterCodes[CharacterCodes["tab"] = 9] = "tab";
-        CharacterCodes[CharacterCodes["verticalTab"] = 11] = "verticalTab";
-    })(ts.CharacterCodes || (ts.CharacterCodes = {}));
-    var CharacterCodes = ts.CharacterCodes;
-})(ts || (ts = {}));
-/// <reference path="types.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    /**
-     * Ternary values are defined such that
-     * x & y is False if either x or y is False.
-     * x & y is Maybe if either x or y is Maybe, but neither x or y is False.
-     * x & y is True if both x and y are True.
-     * x | y is False if both x and y are False.
-     * x | y is Maybe if either x or y is Maybe, but neither x or y is True.
-     * x | y is True if either x or y is True.
-     */
-    (function (Ternary) {
-        Ternary[Ternary["False"] = 0] = "False";
-        Ternary[Ternary["Maybe"] = 1] = "Maybe";
-        Ternary[Ternary["True"] = -1] = "True";
-    })(ts.Ternary || (ts.Ternary = {}));
-    var Ternary = ts.Ternary;
-    function createFileMap(keyMapper) {
-        var files = {};
-        return {
-            get: get,
-            set: set,
-            contains: contains,
-            remove: remove,
-            forEachValue: forEachValueInMap,
-            clear: clear
-        };
-        function forEachValueInMap(f) {
-            for (var key in files) {
-                f(key, files[key]);
-            }
-        }
-        // path should already be well-formed so it does not need to be normalized
-        function get(path) {
-            return files[toKey(path)];
-        }
-        function set(path, value) {
-            files[toKey(path)] = value;
-        }
-        function contains(path) {
-            return hasProperty(files, toKey(path));
-        }
-        function remove(path) {
-            var key = toKey(path);
-            delete files[key];
-        }
-        function clear() {
-            files = {};
-        }
-        function toKey(path) {
-            return keyMapper ? keyMapper(path) : path;
-        }
-    }
-    ts.createFileMap = createFileMap;
-    function toPath(fileName, basePath, getCanonicalFileName) {
-        var nonCanonicalizedPath = isRootedDiskPath(fileName)
-            ? normalizePath(fileName)
-            : getNormalizedAbsolutePath(fileName, basePath);
-        return getCanonicalFileName(nonCanonicalizedPath);
-    }
-    ts.toPath = toPath;
-    (function (Comparison) {
-        Comparison[Comparison["LessThan"] = -1] = "LessThan";
-        Comparison[Comparison["EqualTo"] = 0] = "EqualTo";
-        Comparison[Comparison["GreaterThan"] = 1] = "GreaterThan";
-    })(ts.Comparison || (ts.Comparison = {}));
-    var Comparison = ts.Comparison;
-    /**
-     * Iterates through 'array' by index and performs the callback on each element of array until the callback
-     * returns a truthy value, then returns that value.
-     * If no such value is found, the callback is applied to each element of array and undefined is returned.
-     */
-    function forEach(array, callback) {
-        if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
-                var result = callback(array[i], i);
-                if (result) {
-                    return result;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.forEach = forEach;
-    function contains(array, value, areEqual) {
-        if (array) {
-            for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
-                var v = array_1[_i];
-                if (areEqual ? areEqual(v, value) : v === value) {
-                    return true;
-                }
-            }
-        }
-        return false;
-    }
-    ts.contains = contains;
-    function indexOf(array, value) {
-        if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
-                if (array[i] === value) {
-                    return i;
-                }
-            }
-        }
-        return -1;
-    }
-    ts.indexOf = indexOf;
-    function countWhere(array, predicate) {
-        var count = 0;
-        if (array) {
-            for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
-                var v = array_2[_i];
-                if (predicate(v)) {
-                    count++;
-                }
-            }
-        }
-        return count;
-    }
-    ts.countWhere = countWhere;
-    function filter(array, f) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_3 = array; _i < array_3.length; _i++) {
-                var item = array_3[_i];
-                if (f(item)) {
-                    result.push(item);
-                }
-            }
-        }
-        return result;
-    }
-    ts.filter = filter;
-    function map(array, f) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_4 = array; _i < array_4.length; _i++) {
-                var v = array_4[_i];
-                result.push(f(v));
-            }
-        }
-        return result;
-    }
-    ts.map = map;
-    function concatenate(array1, array2) {
-        if (!array2 || !array2.length)
-            return array1;
-        if (!array1 || !array1.length)
-            return array2;
-        return array1.concat(array2);
-    }
-    ts.concatenate = concatenate;
-    function deduplicate(array, areEqual) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
-                var item = array_5[_i];
-                if (!contains(result, item, areEqual)) {
-                    result.push(item);
-                }
-            }
-        }
-        return result;
-    }
-    ts.deduplicate = deduplicate;
-    function sum(array, prop) {
-        var result = 0;
-        for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
-            var v = array_6[_i];
-            result += v[prop];
-        }
-        return result;
-    }
-    ts.sum = sum;
-    function addRange(to, from) {
-        if (to && from) {
-            for (var _i = 0, from_1 = from; _i < from_1.length; _i++) {
-                var v = from_1[_i];
-                to.push(v);
-            }
-        }
-    }
-    ts.addRange = addRange;
-    function rangeEquals(array1, array2, pos, end) {
-        while (pos < end) {
-            if (array1[pos] !== array2[pos]) {
-                return false;
-            }
-            pos++;
-        }
-        return true;
-    }
-    ts.rangeEquals = rangeEquals;
-    /**
-     * Returns the last element of an array if non-empty, undefined otherwise.
-     */
-    function lastOrUndefined(array) {
-        if (array.length === 0) {
-            return undefined;
-        }
-        return array[array.length - 1];
-    }
-    ts.lastOrUndefined = lastOrUndefined;
-    /**
-     * Performs a binary search, finding the index at which 'value' occurs in 'array'.
-     * If no such index is found, returns the 2's-complement of first index at which
-     * number[index] exceeds number.
-     * @param array A sorted array whose first element must be no larger than number
-     * @param number The value to be searched for in the array.
-     */
-    function binarySearch(array, value) {
-        var low = 0;
-        var high = array.length - 1;
-        while (low <= high) {
-            var middle = low + ((high - low) >> 1);
-            var midValue = array[middle];
-            if (midValue === value) {
-                return middle;
-            }
-            else if (midValue > value) {
-                high = middle - 1;
-            }
-            else {
-                low = middle + 1;
-            }
-        }
-        return ~low;
-    }
-    ts.binarySearch = binarySearch;
-    function reduceLeft(array, f, initial) {
-        if (array) {
-            var count = array.length;
-            if (count > 0) {
-                var pos = 0;
-                var result = void 0;
-                if (arguments.length <= 2) {
-                    result = array[pos];
-                    pos++;
-                }
-                else {
-                    result = initial;
-                }
-                while (pos < count) {
-                    result = f(result, array[pos]);
-                    pos++;
-                }
-                return result;
-            }
-        }
-        return initial;
-    }
-    ts.reduceLeft = reduceLeft;
-    function reduceRight(array, f, initial) {
-        if (array) {
-            var pos = array.length - 1;
-            if (pos >= 0) {
-                var result = void 0;
-                if (arguments.length <= 2) {
-                    result = array[pos];
-                    pos--;
-                }
-                else {
-                    result = initial;
-                }
-                while (pos >= 0) {
-                    result = f(result, array[pos]);
-                    pos--;
-                }
-                return result;
-            }
-        }
-        return initial;
-    }
-    ts.reduceRight = reduceRight;
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-    function hasProperty(map, key) {
-        return hasOwnProperty.call(map, key);
-    }
-    ts.hasProperty = hasProperty;
-    function getKeys(map) {
-        var keys = [];
-        for (var key in map) {
-            keys.push(key);
-        }
-        return keys;
-    }
-    ts.getKeys = getKeys;
-    function getProperty(map, key) {
-        return hasOwnProperty.call(map, key) ? map[key] : undefined;
-    }
-    ts.getProperty = getProperty;
-    function isEmpty(map) {
-        for (var id in map) {
-            if (hasProperty(map, id)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.isEmpty = isEmpty;
-    function clone(object) {
-        var result = {};
-        for (var id in object) {
-            result[id] = object[id];
-        }
-        return result;
-    }
-    ts.clone = clone;
-    function extend(first, second) {
-        var result = {};
-        for (var id in first) {
-            result[id] = first[id];
-        }
-        for (var id in second) {
-            if (!hasProperty(result, id)) {
-                result[id] = second[id];
-            }
-        }
-        return result;
-    }
-    ts.extend = extend;
-    function forEachValue(map, callback) {
-        var result;
-        for (var id in map) {
-            if (result = callback(map[id]))
-                break;
-        }
-        return result;
-    }
-    ts.forEachValue = forEachValue;
-    function forEachKey(map, callback) {
-        var result;
-        for (var id in map) {
-            if (result = callback(id))
-                break;
-        }
-        return result;
-    }
-    ts.forEachKey = forEachKey;
-    function lookUp(map, key) {
-        return hasProperty(map, key) ? map[key] : undefined;
-    }
-    ts.lookUp = lookUp;
-    function copyMap(source, target) {
-        for (var p in source) {
-            target[p] = source[p];
-        }
-    }
-    ts.copyMap = copyMap;
-    /**
-     * Creates a map from the elements of an array.
-     *
-     * @param array the array of input elements.
-     * @param makeKey a function that produces a key for a given element.
-     *
-     * This function makes no effort to avoid collisions; if any two elements produce
-     * the same key with the given 'makeKey' function, then the element with the higher
-     * index in the array will be the one associated with the produced key.
-     */
-    function arrayToMap(array, makeKey) {
-        var result = {};
-        forEach(array, function (value) {
-            result[makeKey(value)] = value;
-        });
-        return result;
-    }
-    ts.arrayToMap = arrayToMap;
-    /**
-     * Reduce the properties of a map.
-     *
-     * @param map The map to reduce
-     * @param callback An aggregation function that is called for each entry in the map
-     * @param initial The initial value for the reduction.
-     */
-    function reduceProperties(map, callback, initial) {
-        var result = initial;
-        if (map) {
-            for (var key in map) {
-                if (hasProperty(map, key)) {
-                    result = callback(result, map[key], String(key));
-                }
-            }
-        }
-        return result;
-    }
-    ts.reduceProperties = reduceProperties;
-    /**
-     * Tests whether a value is an array.
-     */
-    function isArray(value) {
-        return Array.isArray ? Array.isArray(value) : value instanceof Array;
-    }
-    ts.isArray = isArray;
-    function memoize(callback) {
-        var value;
-        return function () {
-            if (callback) {
-                value = callback();
-                callback = undefined;
-            }
-            return value;
-        };
-    }
-    ts.memoize = memoize;
-    function formatStringFromArgs(text, args, baseIndex) {
-        baseIndex = baseIndex || 0;
-        return text.replace(/{(\d+)}/g, function (match, index) { return args[+index + baseIndex]; });
-    }
-    ts.localizedDiagnosticMessages = undefined;
-    function getLocaleSpecificMessage(message) {
-        return ts.localizedDiagnosticMessages && ts.localizedDiagnosticMessages[message.key]
-            ? ts.localizedDiagnosticMessages[message.key]
-            : message.message;
-    }
-    ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
-    function createFileDiagnostic(file, start, length, message) {
-        var end = start + length;
-        Debug.assert(start >= 0, "start must be non-negative, is " + start);
-        Debug.assert(length >= 0, "length must be non-negative, is " + length);
-        if (file) {
-            Debug.assert(start <= file.text.length, "start must be within the bounds of the file. " + start + " > " + file.text.length);
-            Debug.assert(end <= file.text.length, "end must be the bounds of the file. " + end + " > " + file.text.length);
-        }
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 4) {
-            text = formatStringFromArgs(text, arguments, 4);
-        }
-        return {
-            file: file,
-            start: start,
-            length: length,
-            messageText: text,
-            category: message.category,
-            code: message.code
-        };
-    }
-    ts.createFileDiagnostic = createFileDiagnostic;
-    /* internal */
-    function formatMessage(dummy, message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 2) {
-            text = formatStringFromArgs(text, arguments, 2);
-        }
-        return text;
-    }
-    ts.formatMessage = formatMessage;
-    function createCompilerDiagnostic(message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 1) {
-            text = formatStringFromArgs(text, arguments, 1);
-        }
-        return {
-            file: undefined,
-            start: undefined,
-            length: undefined,
-            messageText: text,
-            category: message.category,
-            code: message.code
-        };
-    }
-    ts.createCompilerDiagnostic = createCompilerDiagnostic;
-    function chainDiagnosticMessages(details, message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 2) {
-            text = formatStringFromArgs(text, arguments, 2);
-        }
-        return {
-            messageText: text,
-            category: message.category,
-            code: message.code,
-            next: details
-        };
-    }
-    ts.chainDiagnosticMessages = chainDiagnosticMessages;
-    function concatenateDiagnosticMessageChains(headChain, tailChain) {
-        var lastChain = headChain;
-        while (lastChain.next) {
-            lastChain = lastChain.next;
-        }
-        lastChain.next = tailChain;
-        return headChain;
-    }
-    ts.concatenateDiagnosticMessageChains = concatenateDiagnosticMessageChains;
-    function compareValues(a, b) {
-        if (a === b)
-            return 0 /* EqualTo */;
-        if (a === undefined)
-            return -1 /* LessThan */;
-        if (b === undefined)
-            return 1 /* GreaterThan */;
-        return a < b ? -1 /* LessThan */ : 1 /* GreaterThan */;
-    }
-    ts.compareValues = compareValues;
-    function getDiagnosticFileName(diagnostic) {
-        return diagnostic.file ? diagnostic.file.fileName : undefined;
-    }
-    function compareDiagnostics(d1, d2) {
-        return compareValues(getDiagnosticFileName(d1), getDiagnosticFileName(d2)) ||
-            compareValues(d1.start, d2.start) ||
-            compareValues(d1.length, d2.length) ||
-            compareValues(d1.code, d2.code) ||
-            compareMessageText(d1.messageText, d2.messageText) ||
-            0 /* EqualTo */;
-    }
-    ts.compareDiagnostics = compareDiagnostics;
-    function compareMessageText(text1, text2) {
-        while (text1 && text2) {
-            // We still have both chains.
-            var string1 = typeof text1 === "string" ? text1 : text1.messageText;
-            var string2 = typeof text2 === "string" ? text2 : text2.messageText;
-            var res = compareValues(string1, string2);
-            if (res) {
-                return res;
-            }
-            text1 = typeof text1 === "string" ? undefined : text1.next;
-            text2 = typeof text2 === "string" ? undefined : text2.next;
-        }
-        if (!text1 && !text2) {
-            // if the chains are done, then these messages are the same.
-            return 0 /* EqualTo */;
-        }
-        // We still have one chain remaining.  The shorter chain should come first.
-        return text1 ? 1 /* GreaterThan */ : -1 /* LessThan */;
-    }
-    function sortAndDeduplicateDiagnostics(diagnostics) {
-        return deduplicateSortedDiagnostics(diagnostics.sort(compareDiagnostics));
-    }
-    ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
-    function deduplicateSortedDiagnostics(diagnostics) {
-        if (diagnostics.length < 2) {
-            return diagnostics;
-        }
-        var newDiagnostics = [diagnostics[0]];
-        var previousDiagnostic = diagnostics[0];
-        for (var i = 1; i < diagnostics.length; i++) {
-            var currentDiagnostic = diagnostics[i];
-            var isDupe = compareDiagnostics(currentDiagnostic, previousDiagnostic) === 0 /* EqualTo */;
-            if (!isDupe) {
-                newDiagnostics.push(currentDiagnostic);
-                previousDiagnostic = currentDiagnostic;
-            }
-        }
-        return newDiagnostics;
-    }
-    ts.deduplicateSortedDiagnostics = deduplicateSortedDiagnostics;
-    function normalizeSlashes(path) {
-        return path.replace(/\\/g, "/");
-    }
-    ts.normalizeSlashes = normalizeSlashes;
-    // Returns length of path root (i.e. length of "/", "x:/", "//server/share/, file:///user/files")
-    function getRootLength(path) {
-        if (path.charCodeAt(0) === 47 /* slash */) {
-            if (path.charCodeAt(1) !== 47 /* slash */)
-                return 1;
-            var p1 = path.indexOf("/", 2);
-            if (p1 < 0)
-                return 2;
-            var p2 = path.indexOf("/", p1 + 1);
-            if (p2 < 0)
-                return p1 + 1;
-            return p2 + 1;
-        }
-        if (path.charCodeAt(1) === 58 /* colon */) {
-            if (path.charCodeAt(2) === 47 /* slash */)
-                return 3;
-            return 2;
-        }
-        // Per RFC 1738 'file' URI schema has the shape file://<host>/<path>
-        // if <host> is omitted then it is assumed that host value is 'localhost',
-        // however slash after the omitted <host> is not removed.
-        // file:///folder1/file1 - this is a correct URI
-        // file://folder2/file2 - this is an incorrect URI
-        if (path.lastIndexOf("file:///", 0) === 0) {
-            return "file:///".length;
-        }
-        var idx = path.indexOf("://");
-        if (idx !== -1) {
-            return idx + "://".length;
-        }
-        return 0;
-    }
-    ts.getRootLength = getRootLength;
-    ts.directorySeparator = "/";
-    function getNormalizedParts(normalizedSlashedPath, rootLength) {
-        var parts = normalizedSlashedPath.substr(rootLength).split(ts.directorySeparator);
-        var normalized = [];
-        for (var _i = 0, parts_1 = parts; _i < parts_1.length; _i++) {
-            var part = parts_1[_i];
-            if (part !== ".") {
-                if (part === ".." && normalized.length > 0 && lastOrUndefined(normalized) !== "..") {
-                    normalized.pop();
-                }
-                else {
-                    // A part may be an empty string (which is 'falsy') if the path had consecutive slashes,
-                    // e.g. "path//file.ts".  Drop these before re-joining the parts.
-                    if (part) {
-                        normalized.push(part);
-                    }
-                }
-            }
-        }
-        return normalized;
-    }
-    function normalizePath(path) {
-        path = normalizeSlashes(path);
-        var rootLength = getRootLength(path);
-        var normalized = getNormalizedParts(path, rootLength);
-        return path.substr(0, rootLength) + normalized.join(ts.directorySeparator);
-    }
-    ts.normalizePath = normalizePath;
-    function getDirectoryPath(path) {
-        return path.substr(0, Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator)));
-    }
-    ts.getDirectoryPath = getDirectoryPath;
-    function isUrl(path) {
-        return path && !isRootedDiskPath(path) && path.indexOf("://") !== -1;
-    }
-    ts.isUrl = isUrl;
-    function isRootedDiskPath(path) {
-        return getRootLength(path) !== 0;
-    }
-    ts.isRootedDiskPath = isRootedDiskPath;
-    function normalizedPathComponents(path, rootLength) {
-        var normalizedParts = getNormalizedParts(path, rootLength);
-        return [path.substr(0, rootLength)].concat(normalizedParts);
-    }
-    function getNormalizedPathComponents(path, currentDirectory) {
-        path = normalizeSlashes(path);
-        var rootLength = getRootLength(path);
-        if (rootLength === 0) {
-            // If the path is not rooted it is relative to current directory
-            path = combinePaths(normalizeSlashes(currentDirectory), path);
-            rootLength = getRootLength(path);
-        }
-        return normalizedPathComponents(path, rootLength);
-    }
-    ts.getNormalizedPathComponents = getNormalizedPathComponents;
-    function getNormalizedAbsolutePath(fileName, currentDirectory) {
-        return getNormalizedPathFromPathComponents(getNormalizedPathComponents(fileName, currentDirectory));
-    }
-    ts.getNormalizedAbsolutePath = getNormalizedAbsolutePath;
-    function getNormalizedPathFromPathComponents(pathComponents) {
-        if (pathComponents && pathComponents.length) {
-            return pathComponents[0] + pathComponents.slice(1).join(ts.directorySeparator);
-        }
-    }
-    ts.getNormalizedPathFromPathComponents = getNormalizedPathFromPathComponents;
-    function getNormalizedPathComponentsOfUrl(url) {
-        // Get root length of http://www.website.com/folder1/folder2/
-        // In this example the root is:  http://www.website.com/
-        // normalized path components should be ["http://www.website.com/", "folder1", "folder2"]
-        var urlLength = url.length;
-        // Initial root length is http:// part
-        var rootLength = url.indexOf("://") + "://".length;
-        while (rootLength < urlLength) {
-            // Consume all immediate slashes in the protocol
-            // eg.initial rootlength is just file:// but it needs to consume another "/" in file:///
-            if (url.charCodeAt(rootLength) === 47 /* slash */) {
-                rootLength++;
-            }
-            else {
-                // non slash character means we continue proceeding to next component of root search
-                break;
-            }
-        }
-        // there are no parts after http:// just return current string as the pathComponent
-        if (rootLength === urlLength) {
-            return [url];
-        }
-        // Find the index of "/" after website.com so the root can be http://www.website.com/ (from existing http://)
-        var indexOfNextSlash = url.indexOf(ts.directorySeparator, rootLength);
-        if (indexOfNextSlash !== -1) {
-            // Found the "/" after the website.com so the root is length of http://www.website.com/
-            // and get components after the root normally like any other folder components
-            rootLength = indexOfNextSlash + 1;
-            return normalizedPathComponents(url, rootLength);
-        }
-        else {
-            // Can't find the host assume the rest of the string as component
-            // but make sure we append "/"  to it as root is not joined using "/"
-            // eg. if url passed in was http://website.com we want to use root as [http://website.com/]
-            // so that other path manipulations will be correct and it can be merged with relative paths correctly
-            return [url + ts.directorySeparator];
-        }
-    }
-    function getNormalizedPathOrUrlComponents(pathOrUrl, currentDirectory) {
-        if (isUrl(pathOrUrl)) {
-            return getNormalizedPathComponentsOfUrl(pathOrUrl);
-        }
-        else {
-            return getNormalizedPathComponents(pathOrUrl, currentDirectory);
-        }
-    }
-    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
-        var pathComponents = getNormalizedPathOrUrlComponents(relativeOrAbsolutePath, currentDirectory);
-        var directoryComponents = getNormalizedPathOrUrlComponents(directoryPathOrUrl, currentDirectory);
-        if (directoryComponents.length > 1 && lastOrUndefined(directoryComponents) === "") {
-            // If the directory path given was of type test/cases/ then we really need components of directory to be only till its name
-            // that is  ["test", "cases", ""] needs to be actually ["test", "cases"]
-            directoryComponents.length--;
-        }
-        // Find the component that differs
-        var joinStartIndex;
-        for (joinStartIndex = 0; joinStartIndex < pathComponents.length && joinStartIndex < directoryComponents.length; joinStartIndex++) {
-            if (getCanonicalFileName(directoryComponents[joinStartIndex]) !== getCanonicalFileName(pathComponents[joinStartIndex])) {
-                break;
-            }
-        }
-        // Get the relative path
-        if (joinStartIndex) {
-            var relativePath = "";
-            var relativePathComponents = pathComponents.slice(joinStartIndex, pathComponents.length);
-            for (; joinStartIndex < directoryComponents.length; joinStartIndex++) {
-                if (directoryComponents[joinStartIndex] !== "") {
-                    relativePath = relativePath + ".." + ts.directorySeparator;
-                }
-            }
-            return relativePath + relativePathComponents.join(ts.directorySeparator);
-        }
-        // Cant find the relative path, get the absolute path
-        var absolutePath = getNormalizedPathFromPathComponents(pathComponents);
-        if (isAbsolutePathAnUrl && isRootedDiskPath(absolutePath)) {
-            absolutePath = "file:///" + absolutePath;
-        }
-        return absolutePath;
-    }
-    ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
-    function getBaseFileName(path) {
-        if (path === undefined) {
-            return undefined;
-        }
-        var i = path.lastIndexOf(ts.directorySeparator);
-        return i < 0 ? path : path.substring(i + 1);
-    }
-    ts.getBaseFileName = getBaseFileName;
-    function combinePaths(path1, path2) {
-        if (!(path1 && path1.length))
-            return path2;
-        if (!(path2 && path2.length))
-            return path1;
-        if (getRootLength(path2) !== 0)
-            return path2;
-        if (path1.charAt(path1.length - 1) === ts.directorySeparator)
-            return path1 + path2;
-        return path1 + ts.directorySeparator + path2;
-    }
-    ts.combinePaths = combinePaths;
-    function fileExtensionIs(path, extension) {
-        var pathLen = path.length;
-        var extLen = extension.length;
-        return pathLen > extLen && path.substr(pathLen - extLen, extLen) === extension;
-    }
-    ts.fileExtensionIs = fileExtensionIs;
-    function ensureScriptKind(fileName, scriptKind) {
-        // Using scriptKind as a condition handles both:
-        // - 'scriptKind' is unspecified and thus it is `undefined`
-        // - 'scriptKind' is set and it is `Unknown` (0)
-        // If the 'scriptKind' is 'undefined' or 'Unknown' then we attempt
-        // to get the ScriptKind from the file name. If it cannot be resolved
-        // from the file name then the default 'TS' script kind is returned.
-        return (scriptKind || getScriptKindFromFileName(fileName)) || 3 /* TS */;
-    }
-    ts.ensureScriptKind = ensureScriptKind;
-    function getScriptKindFromFileName(fileName) {
-        var ext = fileName.substr(fileName.lastIndexOf("."));
-        switch (ext.toLowerCase()) {
-            case ".js":
-                return 1 /* JS */;
-            case ".jsx":
-                return 2 /* JSX */;
-            case ".ts":
-                return 3 /* TS */;
-            case ".tsx":
-                return 4 /* TSX */;
-            default:
-                return 0 /* Unknown */;
-        }
-    }
-    ts.getScriptKindFromFileName = getScriptKindFromFileName;
-    /**
-     *  List of supported extensions in order of file resolution precedence.
-     */
-    ts.supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
-    ts.supportedJavascriptExtensions = [".js", ".jsx"];
-    var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
-    function getSupportedExtensions(options) {
-        return options && options.allowJs ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
-    }
-    ts.getSupportedExtensions = getSupportedExtensions;
-    function isSupportedSourceFileName(fileName, compilerOptions) {
-        if (!fileName) {
-            return false;
-        }
-        for (var _i = 0, _a = getSupportedExtensions(compilerOptions); _i < _a.length; _i++) {
-            var extension = _a[_i];
-            if (fileExtensionIs(fileName, extension)) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.isSupportedSourceFileName = isSupportedSourceFileName;
-    var extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
-    function removeFileExtension(path) {
-        for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
-            var ext = extensionsToRemove_1[_i];
-            if (fileExtensionIs(path, ext)) {
-                return path.substr(0, path.length - ext.length);
-            }
-        }
-        return path;
-    }
-    ts.removeFileExtension = removeFileExtension;
-    function Symbol(flags, name) {
-        this.flags = flags;
-        this.name = name;
-        this.declarations = undefined;
-    }
-    function Type(checker, flags) {
-        this.flags = flags;
-    }
-    function Signature(checker) {
-    }
-    function Node(kind, pos, end) {
-        this.kind = kind;
-        this.pos = pos;
-        this.end = end;
-        this.flags = 0 /* None */;
-        this.parent = undefined;
-    }
-    ts.objectAllocator = {
-        getNodeConstructor: function () { return Node; },
-        getSourceFileConstructor: function () { return Node; },
-        getSymbolConstructor: function () { return Symbol; },
-        getTypeConstructor: function () { return Type; },
-        getSignatureConstructor: function () { return Signature; }
-    };
-    (function (AssertionLevel) {
-        AssertionLevel[AssertionLevel["None"] = 0] = "None";
-        AssertionLevel[AssertionLevel["Normal"] = 1] = "Normal";
-        AssertionLevel[AssertionLevel["Aggressive"] = 2] = "Aggressive";
-        AssertionLevel[AssertionLevel["VeryAggressive"] = 3] = "VeryAggressive";
-    })(ts.AssertionLevel || (ts.AssertionLevel = {}));
-    var AssertionLevel = ts.AssertionLevel;
-    var Debug;
-    (function (Debug) {
-        var currentAssertionLevel = 0 /* None */;
-        function shouldAssert(level) {
-            return currentAssertionLevel >= level;
-        }
-        Debug.shouldAssert = shouldAssert;
-        function assert(expression, message, verboseDebugInfo) {
-            if (!expression) {
-                var verboseDebugString = "";
-                if (verboseDebugInfo) {
-                    verboseDebugString = "\r\nVerbose Debug Information: " + verboseDebugInfo();
-                }
-                debugger;
-                throw new Error("Debug Failure. False expression: " + (message || "") + verboseDebugString);
-            }
-        }
-        Debug.assert = assert;
-        function fail(message) {
-            Debug.assert(/*expression*/ false, message);
-        }
-        Debug.fail = fail;
-    })(Debug = ts.Debug || (ts.Debug = {}));
-    function copyListRemovingItem(item, list) {
-        var copiedList = [];
-        for (var _i = 0, list_1 = list; _i < list_1.length; _i++) {
-            var e = list_1[_i];
-            if (e !== item) {
-                copiedList.push(e);
-            }
-        }
-        return copiedList;
-    }
-    ts.copyListRemovingItem = copyListRemovingItem;
-    function createGetCanonicalFileName(useCaseSensitivefileNames) {
-        return useCaseSensitivefileNames
-            ? (function (fileName) { return fileName; })
-            : (function (fileName) { return fileName.toLowerCase(); });
-    }
-    ts.createGetCanonicalFileName = createGetCanonicalFileName;
-})(ts || (ts = {}));
-/// <reference path="core.ts"/>
-var ts;
-(function (ts) {
-    ts.sys = (function () {
-        function getWScriptSystem() {
-            var fso = new ActiveXObject("Scripting.FileSystemObject");
-            var fileStream = new ActiveXObject("ADODB.Stream");
-            fileStream.Type = 2 /*text*/;
-            var binaryStream = new ActiveXObject("ADODB.Stream");
-            binaryStream.Type = 1 /*binary*/;
-            var args = [];
-            for (var i = 0; i < WScript.Arguments.length; i++) {
-                args[i] = WScript.Arguments.Item(i);
-            }
-            function readFile(fileName, encoding) {
-                if (!fso.FileExists(fileName)) {
-                    return undefined;
-                }
-                fileStream.Open();
-                try {
-                    if (encoding) {
-                        fileStream.Charset = encoding;
-                        fileStream.LoadFromFile(fileName);
-                    }
-                    else {
-                        // Load file and read the first two bytes into a string with no interpretation
-                        fileStream.Charset = "x-ansi";
-                        fileStream.LoadFromFile(fileName);
-                        var bom = fileStream.ReadText(2) || "";
-                        // Position must be at 0 before encoding can be changed
-                        fileStream.Position = 0;
-                        // [0xFF,0xFE] and [0xFE,0xFF] mean utf-16 (little or big endian), otherwise default to utf-8
-                        fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
-                    }
-                    // ReadText method always strips byte order mark from resulting string
-                    return fileStream.ReadText();
-                }
-                catch (e) {
-                    throw e;
-                }
-                finally {
-                    fileStream.Close();
-                }
-            }
-            function writeFile(fileName, data, writeByteOrderMark) {
-                fileStream.Open();
-                binaryStream.Open();
-                try {
-                    // Write characters in UTF-8 encoding
-                    fileStream.Charset = "utf-8";
-                    fileStream.WriteText(data);
-                    // If we don't want the BOM, then skip it by setting the starting location to 3 (size of BOM).
-                    // If not, start from position 0, as the BOM will be added automatically when charset==utf8.
-                    if (writeByteOrderMark) {
-                        fileStream.Position = 0;
-                    }
-                    else {
-                        fileStream.Position = 3;
-                    }
-                    fileStream.CopyTo(binaryStream);
-                    binaryStream.SaveToFile(fileName, 2 /*overwrite*/);
-                }
-                finally {
-                    binaryStream.Close();
-                    fileStream.Close();
-                }
-            }
-            function getCanonicalPath(path) {
-                return path.toLowerCase();
-            }
-            function getNames(collection) {
-                var result = [];
-                for (var e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
-                    result.push(e.item().Name);
-                }
-                return result.sort();
-            }
-            function getDirectories(path) {
-                var folder = fso.GetFolder(path);
-                return getNames(folder.subfolders);
-            }
-            function readDirectory(path, extension, exclude) {
-                var result = [];
-                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
-                visitDirectory(path);
-                return result;
-                function visitDirectory(path) {
-                    var folder = fso.GetFolder(path || ".");
-                    var files = getNames(folder.files);
-                    for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
-                        var current = files_1[_i];
-                        var name_1 = ts.combinePaths(path, current);
-                        if ((!extension || ts.fileExtensionIs(name_1, extension)) && !ts.contains(exclude, getCanonicalPath(name_1))) {
-                            result.push(name_1);
-                        }
-                    }
-                    var subfolders = getNames(folder.subfolders);
-                    for (var _a = 0, subfolders_1 = subfolders; _a < subfolders_1.length; _a++) {
-                        var current = subfolders_1[_a];
-                        var name_2 = ts.combinePaths(path, current);
-                        if (!ts.contains(exclude, getCanonicalPath(name_2))) {
-                            visitDirectory(name_2);
-                        }
-                    }
-                }
-            }
-            return {
-                args: args,
-                newLine: "\r\n",
-                useCaseSensitiveFileNames: false,
-                write: function (s) {
-                    WScript.StdOut.Write(s);
-                },
-                readFile: readFile,
-                writeFile: writeFile,
-                resolvePath: function (path) {
-                    return fso.GetAbsolutePathName(path);
-                },
-                fileExists: function (path) {
-                    return fso.FileExists(path);
-                },
-                directoryExists: function (path) {
-                    return fso.FolderExists(path);
-                },
-                createDirectory: function (directoryName) {
-                    if (!this.directoryExists(directoryName)) {
-                        fso.CreateFolder(directoryName);
-                    }
-                },
-                getExecutingFilePath: function () {
-                    return WScript.ScriptFullName;
-                },
-                getCurrentDirectory: function () {
-                    return new ActiveXObject("WScript.Shell").CurrentDirectory;
-                },
-                getDirectories: getDirectories,
-                readDirectory: readDirectory,
-                exit: function (exitCode) {
-                    try {
-                        WScript.Quit(exitCode);
-                    }
-                    catch (e) {
-                    }
-                }
-            };
-        }
-        function getNodeSystem() {
-            var _fs = require("fs");
-            var _path = require("path");
-            var _os = require("os");
-            var _crypto = require("crypto");
-            var useNonPollingWatchers = process.env["TSC_NONPOLLING_WATCHER"];
-            function createWatchedFileSet() {
-                var dirWatchers = {};
-                // One file can have multiple watchers
-                var fileWatcherCallbacks = {};
-                return { addFile: addFile, removeFile: removeFile };
-                function reduceDirWatcherRefCountForFile(fileName) {
-                    var dirName = ts.getDirectoryPath(fileName);
-                    if (ts.hasProperty(dirWatchers, dirName)) {
-                        var watcher = dirWatchers[dirName];
-                        watcher.referenceCount -= 1;
-                        if (watcher.referenceCount <= 0) {
-                            watcher.close();
-                            delete dirWatchers[dirName];
-                        }
-                    }
-                }
-                function addDirWatcher(dirPath) {
-                    if (ts.hasProperty(dirWatchers, dirPath)) {
-                        var watcher_1 = dirWatchers[dirPath];
-                        watcher_1.referenceCount += 1;
-                        return;
-                    }
-                    var watcher = _fs.watch(dirPath, { persistent: true }, function (eventName, relativeFileName) { return fileEventHandler(eventName, relativeFileName, dirPath); });
-                    watcher.referenceCount = 1;
-                    dirWatchers[dirPath] = watcher;
-                    return;
-                }
-                function addFileWatcherCallback(filePath, callback) {
-                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
-                        fileWatcherCallbacks[filePath].push(callback);
-                    }
-                    else {
-                        fileWatcherCallbacks[filePath] = [callback];
-                    }
-                }
-                function addFile(fileName, callback) {
-                    addFileWatcherCallback(fileName, callback);
-                    addDirWatcher(ts.getDirectoryPath(fileName));
-                    return { fileName: fileName, callback: callback };
-                }
-                function removeFile(watchedFile) {
-                    removeFileWatcherCallback(watchedFile.fileName, watchedFile.callback);
-                    reduceDirWatcherRefCountForFile(watchedFile.fileName);
-                }
-                function removeFileWatcherCallback(filePath, callback) {
-                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
-                        var newCallbacks = ts.copyListRemovingItem(callback, fileWatcherCallbacks[filePath]);
-                        if (newCallbacks.length === 0) {
-                            delete fileWatcherCallbacks[filePath];
-                        }
-                        else {
-                            fileWatcherCallbacks[filePath] = newCallbacks;
-                        }
-                    }
-                }
-                function fileEventHandler(eventName, relativeFileName, baseDirPath) {
-                    // When files are deleted from disk, the triggered "rename" event would have a relativefileName of "undefined"
-                    var fileName = typeof relativeFileName !== "string"
-                        ? undefined
-                        : ts.getNormalizedAbsolutePath(relativeFileName, baseDirPath);
-                    // Some applications save a working file via rename operations
-                    if ((eventName === "change" || eventName === "rename") && ts.hasProperty(fileWatcherCallbacks, fileName)) {
-                        for (var _i = 0, _a = fileWatcherCallbacks[fileName]; _i < _a.length; _i++) {
-                            var fileCallback = _a[_i];
-                            fileCallback(fileName);
-                        }
-                    }
-                }
-            }
-            var watchedFileSet = createWatchedFileSet();
-            function isNode4OrLater() {
-                return parseInt(process.version.charAt(1)) >= 4;
-            }
-            var platform = _os.platform();
-            // win32\win64 are case insensitive platforms, MacOS (darwin) by default is also case insensitive
-            var useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
-            function readFile(fileName, encoding) {
-                if (!fileExists(fileName)) {
-                    return undefined;
-                }
-                var buffer = _fs.readFileSync(fileName);
-                var len = buffer.length;
-                if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
-                    // Big endian UTF-16 byte order mark detected. Since big endian is not supported by node.js,
-                    // flip all byte pairs and treat as little endian.
-                    len &= ~1;
-                    for (var i = 0; i < len; i += 2) {
-                        var temp = buffer[i];
-                        buffer[i] = buffer[i + 1];
-                        buffer[i + 1] = temp;
-                    }
-                    return buffer.toString("utf16le", 2);
-                }
-                if (len >= 2 && buffer[0] === 0xFF && buffer[1] === 0xFE) {
-                    // Little endian UTF-16 byte order mark detected
-                    return buffer.toString("utf16le", 2);
-                }
-                if (len >= 3 && buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
-                    // UTF-8 byte order mark detected
-                    return buffer.toString("utf8", 3);
-                }
-                // Default is UTF-8 with no byte order mark
-                return buffer.toString("utf8");
-            }
-            function writeFile(fileName, data, writeByteOrderMark) {
-                // If a BOM is required, emit one
-                if (writeByteOrderMark) {
-                    data = "\uFEFF" + data;
-                }
-                var fd;
-                try {
-                    fd = _fs.openSync(fileName, "w");
-                    _fs.writeSync(fd, data, undefined, "utf8");
-                }
-                finally {
-                    if (fd !== undefined) {
-                        _fs.closeSync(fd);
-                    }
-                }
-            }
-            function getCanonicalPath(path) {
-                return useCaseSensitiveFileNames ? path : path.toLowerCase();
-            }
-            var FileSystemEntryKind;
-            (function (FileSystemEntryKind) {
-                FileSystemEntryKind[FileSystemEntryKind["File"] = 0] = "File";
-                FileSystemEntryKind[FileSystemEntryKind["Directory"] = 1] = "Directory";
-            })(FileSystemEntryKind || (FileSystemEntryKind = {}));
-            function fileSystemEntryExists(path, entryKind) {
-                try {
-                    var stat = _fs.statSync(path);
-                    switch (entryKind) {
-                        case 0 /* File */: return stat.isFile();
-                        case 1 /* Directory */: return stat.isDirectory();
-                    }
-                }
-                catch (e) {
-                    return false;
-                }
-            }
-            function fileExists(path) {
-                return fileSystemEntryExists(path, 0 /* File */);
-            }
-            function directoryExists(path) {
-                return fileSystemEntryExists(path, 1 /* Directory */);
-            }
-            function getDirectories(path) {
-                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1 /* Directory */); });
-            }
-            function readDirectory(path, extension, exclude) {
-                var result = [];
-                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
-                visitDirectory(path);
-                return result;
-                function visitDirectory(path) {
-                    var files = _fs.readdirSync(path || ".").sort();
-                    var directories = [];
-                    for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
-                        var current = files_2[_i];
-                        // This is necessary because on some file system node fails to exclude
-                        // "." and "..". See https://github.com/nodejs/node/issues/4002
-                        if (current === "." || current === "..") {
-                            continue;
-                        }
-                        var name_3 = ts.combinePaths(path, current);
-                        if (!ts.contains(exclude, getCanonicalPath(name_3))) {
-                            var stat = _fs.statSync(name_3);
-                            if (stat.isFile()) {
-                                if (!extension || ts.fileExtensionIs(name_3, extension)) {
-                                    result.push(name_3);
-                                }
-                            }
-                            else if (stat.isDirectory()) {
-                                directories.push(name_3);
-                            }
-                        }
-                    }
-                    for (var _a = 0, directories_1 = directories; _a < directories_1.length; _a++) {
-                        var current = directories_1[_a];
-                        visitDirectory(current);
-                    }
-                }
-            }
-            return {
-                args: process.argv.slice(2),
-                newLine: _os.EOL,
-                useCaseSensitiveFileNames: useCaseSensitiveFileNames,
-                write: function (s) {
-                    process.stdout.write(s);
-                },
-                readFile: readFile,
-                writeFile: writeFile,
-                watchFile: function (fileName, callback) {
-                    if (useNonPollingWatchers) {
-                        var watchedFile_1 = watchedFileSet.addFile(fileName, callback);
-                        return {
-                            close: function () { return watchedFileSet.removeFile(watchedFile_1); }
-                        };
-                    }
-                    else {
-                        _fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
-                        return {
-                            close: function () { return _fs.unwatchFile(fileName, fileChanged); }
-                        };
-                    }
-                    function fileChanged(curr, prev) {
-                        if (+curr.mtime <= +prev.mtime) {
-                            return;
-                        }
-                        callback(fileName);
-                    }
-                },
-                watchDirectory: function (directoryName, callback, recursive) {
-                    // Node 4.0 `fs.watch` function supports the "recursive" option on both OSX and Windows
-                    // (ref: https://github.com/nodejs/node/pull/2649 and https://github.com/Microsoft/TypeScript/issues/4643)
-                    var options;
-                    if (isNode4OrLater() && (process.platform === "win32" || process.platform === "darwin")) {
-                        options = { persistent: true, recursive: !!recursive };
-                    }
-                    else {
-                        options = { persistent: true };
-                    }
-                    return _fs.watch(directoryName, options, function (eventName, relativeFileName) {
-                        // In watchDirectory we only care about adding and removing files (when event name is
-                        // "rename"); changes made within files are handled by corresponding fileWatchers (when
-                        // event name is "change")
-                        if (eventName === "rename") {
-                            // When deleting a file, the passed baseFileName is null
-                            callback(!relativeFileName ? relativeFileName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
-                        }
-                        ;
-                    });
-                },
-                resolvePath: function (path) {
-                    return _path.resolve(path);
-                },
-                fileExists: fileExists,
-                directoryExists: directoryExists,
-                createDirectory: function (directoryName) {
-                    if (!this.directoryExists(directoryName)) {
-                        _fs.mkdirSync(directoryName);
-                    }
-                },
-                getExecutingFilePath: function () {
-                    return __filename;
-                },
-                getCurrentDirectory: function () {
-                    return process.cwd();
-                },
-                getDirectories: getDirectories,
-                readDirectory: readDirectory,
-                getModifiedTime: function (path) {
-                    try {
-                        return _fs.statSync(path).mtime;
-                    }
-                    catch (e) {
-                        return undefined;
-                    }
-                },
-                createHash: function (data) {
-                    var hash = _crypto.createHash("md5");
-                    hash.update(data);
-                    return hash.digest("hex");
-                },
-                getMemoryUsage: function () {
-                    if (global.gc) {
-                        global.gc();
-                    }
-                    return process.memoryUsage().heapUsed;
-                },
-                exit: function (exitCode) {
-                    process.exit(exitCode);
-                },
-                realpath: function (path) {
-                    return _fs.realpathSync(path);
-                }
-            };
-        }
-        function getChakraSystem() {
-            var realpath = ChakraHost.realpath && (function (path) { return ChakraHost.realpath(path); });
-            return {
-                newLine: ChakraHost.newLine || "\r\n",
-                args: ChakraHost.args,
-                useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
-                write: ChakraHost.echo,
-                readFile: function (path, encoding) {
-                    // encoding is automatically handled by the implementation in ChakraHost
-                    return ChakraHost.readFile(path);
-                },
-                writeFile: function (path, data, writeByteOrderMark) {
-                    // If a BOM is required, emit one
-                    if (writeByteOrderMark) {
-                        data = "\uFEFF" + data;
-                    }
-                    ChakraHost.writeFile(path, data);
-                },
-                resolvePath: ChakraHost.resolvePath,
-                fileExists: ChakraHost.fileExists,
-                directoryExists: ChakraHost.directoryExists,
-                createDirectory: ChakraHost.createDirectory,
-                getExecutingFilePath: function () { return ChakraHost.executingFile; },
-                getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
-                getDirectories: ChakraHost.getDirectories,
-                readDirectory: ChakraHost.readDirectory,
-                exit: ChakraHost.quit,
-                realpath: realpath
-            };
-        }
-        if (typeof ChakraHost !== "undefined") {
-            return getChakraSystem();
-        }
-        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
-            return getWScriptSystem();
-        }
-        else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
-            // process and process.nextTick checks if current environment is node-like
-            // process.browser check excludes webpack and browserify
-            return getNodeSystem();
-        }
-        else {
-            return undefined; // Unsupported host
-        }
-    })();
-})(ts || (ts = {}));
-// <auto-generated />
-/// <reference path="types.ts" />
-/* @internal */
-var ts;
-(function (ts) {
-    ts.Diagnostics = {
-        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
-        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
-        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
-        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
-        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
-        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
-        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
-        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
-        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
-        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
-        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
-        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
-        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
-        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
-        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
-        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
-        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
-        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
-        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
-        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
-        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
-        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
-        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
-        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
-        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
-        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
-        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
-        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
-        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
-        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
-        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
-        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
-        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
-        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
-        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
-        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
-        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
-        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
-        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
-        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
-        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
-        Type_0_is_not_a_valid_async_function_return_type: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_1055", message: "Type '{0}' is not a valid async function return type." },
-        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
-        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
-        Operand_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "Operand_for_await_does_not_have_a_valid_callable_then_member_1058", message: "Operand for 'await' does not have a valid callable 'then' member." },
-        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: { code: 1059, category: ts.DiagnosticCategory.Error, key: "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059", message: "Return expression in async function does not have a valid callable 'then' member." },
-        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: { code: 1060, category: ts.DiagnosticCategory.Error, key: "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060", message: "Expression body for async arrow function does not have a valid callable 'then' member." },
-        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
-        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
-        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
-        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
-        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
-        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
-        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
-        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
-        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
-        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
-        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher." },
-        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
-        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
-        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
-        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
-        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
-        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
-        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
-        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
-        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
-        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
-        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
-        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
-        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
-        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
-        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
-        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
-        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
-        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
-        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
-        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
-        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
-        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'" },
-        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
-        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
-        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
-        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
-        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
-        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
-        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
-        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
-        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
-        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
-        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
-        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
-        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
-        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
-        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
-        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
-        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
-        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
-        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
-        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
-        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
-        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
-        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
-        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
-        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
-        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
-        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
-        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
-        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
-        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
-        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
-        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
-        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
-        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
-        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
-        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
-        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
-        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
-        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
-        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
-        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
-        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
-        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
-        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
-        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
-        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
-        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
-        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
-        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
-        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
-        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
-        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
-        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
-        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
-        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
-        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
-        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
-        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
-        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
-        A_parameter_property_may_not_be_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_a_binding_pattern_1187", message: "A parameter property may not be a binding pattern." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
-        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
-        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
-        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
-        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
-        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
-        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
-        Catch_clause_variable_name_must_be_an_identifier: { code: 1195, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_name_must_be_an_identifier_1195", message: "Catch clause variable name must be an identifier." },
-        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
-        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
-        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
-        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
-        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
-        Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
-        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
-        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
-        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
-        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
-        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
-        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
-        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
-        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
-        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
-        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
-        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
-        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
-        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
-        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
-        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
-        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
-        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
-        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
-        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
-        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
-        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
-        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
-        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
-        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
-        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
-        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
-        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
-        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
-        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
-        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
-        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
-        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
-        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
-        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
-        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
-        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
-        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
-        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
-        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
-        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
-        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
-        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
-        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
-        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
-        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
-        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
-        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
-        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
-        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
-        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
-        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
-        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
-        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
-        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
-        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
-        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
-        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
-        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
-        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
-        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
-        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
-        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
-        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
-        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
-        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
-        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
-        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
-        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
-        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
-        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
-        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
-        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
-        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
-        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
-        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
-        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
-        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
-        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
-        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
-        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
-        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
-        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
-        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
-        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
-        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
-        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
-        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
-        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
-        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
-        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
-        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
-        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
-        Supplied_parameters_do_not_match_any_signature_of_call_target: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Supplied_parameters_do_not_match_any_signature_of_call_target_2346", message: "Supplied parameters do not match any signature of call target." },
-        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
-        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
-        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_2349", message: "Cannot invoke an expression whose type lacks a call signature." },
-        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
-        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
-        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
-        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
-        No_best_common_type_exists_among_return_expressions: { code: 2354, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_return_expressions_2354", message: "No best common type exists among return expressions." },
-        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
-        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
-        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357", message: "The operand of an increment or decrement operator must be a variable, property or indexer." },
-        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
-        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
-        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
-        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter" },
-        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_of_assignment_expression_2364", message: "Invalid left-hand side of assignment expression." },
-        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
-        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
-        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'" },
-        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
-        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
-        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
-        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
-        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
-        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
-        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
-        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
-        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
-        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
-        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
-        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
-        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
-        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
-        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
-        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
-        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
-        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
-        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
-        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
-        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
-        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
-        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
-        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
-        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
-        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
-        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
-        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
-        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
-        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
-        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
-        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
-        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
-        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
-        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
-        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
-        Invalid_left_hand_side_in_for_in_statement: { code: 2406, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_in_statement_2406", message: "Invalid left-hand side in 'for...in' statement." },
-        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
-        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
-        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class" },
-        All_symbols_within_a_with_block_will_be_resolved_to_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "All_symbols_within_a_with_block_will_be_resolved_to_any_2410", message: "All symbols within a 'with' block will be resolved to 'any'." },
-        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
-        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
-        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
-        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'" },
-        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
-        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
-        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
-        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
-        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
-        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
-        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'" },
-        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
-        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
-        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'" },
-        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
-        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged" },
-        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged" },
-        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
-        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
-        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name" },
-        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'" },
-        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
-        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'" },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
-        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
-        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
-        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
-        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
-        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
-        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
-        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
-        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: { code: 2449, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449", message: "The operand of an increment or decrement operator cannot be a constant or a read-only property." },
-        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450", message: "Left-hand side of assignment expression cannot be a constant or a read-only property." },
-        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
-        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
-        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
-        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
-        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
-        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
-        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'" },
-        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
-        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
-        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
-        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
-        A_rest_element_must_be_last_in_an_array_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462", message: "A rest element must be last in an array destructuring pattern" },
-        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
-        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
-        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
-        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
-        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
-        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
-        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
-        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
-        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
-        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
-        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
-        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
-        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
-        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
-        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
-        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
-        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
-        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
-        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
-        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
-        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'" },
-        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2485, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485", message: "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2486, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486", message: "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property." },
-        Invalid_left_hand_side_in_for_of_statement: { code: 2487, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_of_statement_2487", message: "Invalid left-hand side in 'for...of' statement." },
-        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
-        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
-        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
-        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause" },
-        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
-        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
-        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
-        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
-        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
-        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
-        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
-        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
-        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
-        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
-        No_best_common_type_exists_among_yield_expressions: { code: 2504, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_yield_expressions_2504", message: "No best common type exists among yield expressions." },
-        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
-        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
-        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
-        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
-        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
-        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
-        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
-        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
-        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
-        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
-        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
-        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
-        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
-        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
-        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
-        The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_function_expression: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_2522", message: "The 'arguments' object cannot be referenced in an async arrow function. Consider using a standard async function expression." },
-        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
-        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
-        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
-        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
-        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
-        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
-        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
-        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
-        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
-        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
-        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
-        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
-        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
-        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
-        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'" },
-        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
-        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
-        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
-        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property" },
-        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property" },
-        Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: ts.DiagnosticCategory.Error, key: "Cannot_emit_namespaced_JSX_elements_in_React_2650", message: "Cannot emit namespaced JSX elements in React" },
-        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
-        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
-        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
-        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
-        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
-        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element" },
-        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'" },
-        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
-        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
-        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
-        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
-        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
-        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
-        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
-        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
-        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
-        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
-        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
-        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
-        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
-        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
-        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
-        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
-        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
-        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
-        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
-        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: { code: 2679, category: ts.DiagnosticCategory.Error, key: "A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void_2679", message: "A function that is called with the 'new' keyword cannot have a 'this' type that is 'void'." },
-        A_this_parameter_must_be_the_first_parameter: { code: 2680, category: ts.DiagnosticCategory.Error, key: "A_this_parameter_must_be_the_first_parameter_2680", message: "A 'this' parameter must be the first parameter." },
-        A_constructor_cannot_have_a_this_parameter: { code: 2681, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_have_a_this_parameter_2681", message: "A constructor cannot have a 'this' parameter." },
-        get_and_set_accessor_must_have_the_same_this_type: { code: 2682, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_this_type_2682", message: "'get' and 'set' accessor must have the same 'this' type." },
-        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
-        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
-        The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
-        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
-        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
-        Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
-        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4006, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4006", message: "Type parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4008, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4008", message: "Type parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4010, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4010", message: "Type parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4012, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4012", message: "Type parameter '{0}' of public method from exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4014, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", message: "Type parameter '{0}' of method from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4016, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", message: "Type parameter '{0}' of exported function has or is using private name '{1}'." },
-        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4019, category: ts.DiagnosticCategory.Error, key: "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", message: "Implements clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "Extends clause of exported interface '{0}' has or is using private name '{1}'." },
-        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4023, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", message: "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named." },
-        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: { code: 4024, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", message: "Exported variable '{0}' has or is using name '{1}' from private module '{2}'." },
-        Exported_variable_0_has_or_is_using_private_name_1: { code: 4025, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_private_name_1_4025", message: "Exported variable '{0}' has or is using private name '{1}'." },
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4026, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026", message: "Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4027, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4027", message: "Public static property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
-        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4028, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_private_name_1_4028", message: "Public static property '{0}' of exported class has or is using private name '{1}'." },
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4029, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029", message: "Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4030, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4030", message: "Public property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
-        Public_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4031, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_private_name_1_4031", message: "Public property '{0}' of exported class has or is using private name '{1}'." },
-        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4032, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4032", message: "Property '{0}' of exported interface has or is using name '{1}' from private module '{2}'." },
-        Property_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4033, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_private_name_1_4033", message: "Property '{0}' of exported interface has or is using private name '{1}'." },
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4034, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_4034", message: "Parameter '{0}' of public static property setter from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4035, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1_4035", message: "Parameter '{0}' of public static property setter from exported class has or is using private name '{1}'." },
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4036, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_4036", message: "Parameter '{0}' of public property setter from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4037, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1_4037", message: "Parameter '{0}' of public property setter from exported class has or is using private name '{1}'." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4038, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_externa_4038", message: "Return type of public static property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4039, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_4039", message: "Return type of public static property getter from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4040, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0_4040", message: "Return type of public static property getter from exported class has or is using private name '{0}'." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4041, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_modul_4041", message: "Return type of public property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4042, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_4042", message: "Return type of public property getter from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4043, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0_4043", message: "Return type of public property getter from exported class has or is using private name '{0}'." },
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4044, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_mod_4044", message: "Return type of constructor signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4045, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0_4045", message: "Return type of constructor signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4046, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4046", message: "Return type of call signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4047, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0_4047", message: "Return type of call signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4048, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4048", message: "Return type of index signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4049, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0_4049", message: "Return type of index signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4050, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module__4050", message: "Return type of public static method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4051, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4051", message: "Return type of public static method from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: { code: 4052, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0_4052", message: "Return type of public static method from exported class has or is using private name '{0}'." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4053, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_c_4053", message: "Return type of public method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4054, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4054", message: "Return type of public method from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: { code: 4055, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0_4055", message: "Return type of public method from exported class has or is using private name '{0}'." },
-        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4056, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4056", message: "Return type of method from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: { code: 4057, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0_4057", message: "Return type of method from exported interface has or is using private name '{0}'." },
-        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4058, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named_4058", message: "Return type of exported function has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: { code: 4059, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1_4059", message: "Return type of exported function has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_exported_function_has_or_is_using_private_name_0: { code: 4060, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_private_name_0_4060", message: "Return type of exported function has or is using private name '{0}'." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4061, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_can_4061", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4062, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2_4062", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: { code: 4063, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1_4063", message: "Parameter '{0}' of constructor from exported class has or is using private name '{1}'." },
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4064, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_mod_4064", message: "Parameter '{0}' of constructor signature from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4065, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4065", message: "Parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4066, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4066", message: "Parameter '{0}' of call signature from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4067, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4067", message: "Parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4068, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module__4068", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4069, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4069", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4070, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4070", message: "Parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4071, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_c_4071", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4072, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4072", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4073, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4073", message: "Parameter '{0}' of public method from exported class has or is using private name '{1}'." },
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4074, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4074", message: "Parameter '{0}' of method from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4075, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4075", message: "Parameter '{0}' of method from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4076, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4076", message: "Parameter '{0}' of exported function has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: { code: 4077, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2_4077", message: "Parameter '{0}' of exported function has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4078, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", message: "Parameter '{0}' of exported function has or is using private name '{1}'." },
-        Exported_type_alias_0_has_or_is_using_private_name_1: { code: 4081, category: ts.DiagnosticCategory.Error, key: "Exported_type_alias_0_has_or_is_using_private_name_1_4081", message: "Exported type alias '{0}' has or is using private name '{1}'." },
-        Default_export_of_the_module_has_or_is_using_private_name_0: { code: 4082, category: ts.DiagnosticCategory.Error, key: "Default_export_of_the_module_has_or_is_using_private_name_0_4082", message: "Default export of the module has or is using private name '{0}'." },
-        Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict: { code: 4090, category: ts.DiagnosticCategory.Message, key: "Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_t_4090", message: "Conflicting library definitions for '{0}' found at '{1}' and '{2}'. Copy the correct file to the 'typings' folder to resolve this conflict." },
-        The_current_host_does_not_support_the_0_option: { code: 5001, category: ts.DiagnosticCategory.Error, key: "The_current_host_does_not_support_the_0_option_5001", message: "The current host does not support the '{0}' option." },
-        Cannot_find_the_common_subdirectory_path_for_the_input_files: { code: 5009, category: ts.DiagnosticCategory.Error, key: "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", message: "Cannot find the common subdirectory path for the input files." },
-        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}" },
-        Unsupported_file_encoding: { code: 5013, category: ts.DiagnosticCategory.Error, key: "Unsupported_file_encoding_5013", message: "Unsupported file encoding." },
-        Failed_to_parse_file_0_Colon_1: { code: 5014, category: ts.DiagnosticCategory.Error, key: "Failed_to_parse_file_0_Colon_1_5014", message: "Failed to parse file '{0}': {1}." },
-        Unknown_compiler_option_0: { code: 5023, category: ts.DiagnosticCategory.Error, key: "Unknown_compiler_option_0_5023", message: "Unknown compiler option '{0}'." },
-        Compiler_option_0_requires_a_value_of_type_1: { code: 5024, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_requires_a_value_of_type_1_5024", message: "Compiler option '{0}' requires a value of type {1}." },
-        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}" },
-        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: { code: 5042, category: ts.DiagnosticCategory.Error, key: "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", message: "Option 'project' cannot be mixed with source files on a command line." },
-        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: { code: 5047, category: ts.DiagnosticCategory.Error, key: "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", message: "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher." },
-        Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: { code: 5051, category: ts.DiagnosticCategory.Error, key: "Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_prov_5051", message: "Option 'inlineSources' can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided." },
-        Option_0_cannot_be_specified_without_specifying_option_1: { code: 5052, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_without_specifying_option_1_5052", message: "Option '{0}' cannot be specified without specifying option '{1}'." },
-        Option_0_cannot_be_specified_with_option_1: { code: 5053, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_with_option_1_5053", message: "Option '{0}' cannot be specified with option '{1}'." },
-        A_tsconfig_json_file_is_already_defined_at_Colon_0: { code: 5054, category: ts.DiagnosticCategory.Error, key: "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", message: "A 'tsconfig.json' file is already defined at: '{0}'." },
-        Cannot_write_file_0_because_it_would_overwrite_input_file: { code: 5055, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", message: "Cannot write file '{0}' because it would overwrite input file." },
-        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: { code: 5056, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", message: "Cannot write file '{0}' because it would be overwritten by multiple input files." },
-        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'" },
-        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'" },
-        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: { code: 5059, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", message: "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier." },
-        Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
-        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
-        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
-        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
-        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
-        Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
-        Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
-        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: { code: 6003, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", message: "Specify the location where debugger should locate map files instead of generated locations." },
-        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: { code: 6004, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations_6004", message: "Specify the location where debugger should locate TypeScript files instead of source locations." },
-        Watch_input_files: { code: 6005, category: ts.DiagnosticCategory.Message, key: "Watch_input_files_6005", message: "Watch input files." },
-        Redirect_output_structure_to_the_directory: { code: 6006, category: ts.DiagnosticCategory.Message, key: "Redirect_output_structure_to_the_directory_6006", message: "Redirect output structure to the directory." },
-        Do_not_erase_const_enum_declarations_in_generated_code: { code: 6007, category: ts.DiagnosticCategory.Message, key: "Do_not_erase_const_enum_declarations_in_generated_code_6007", message: "Do not erase const enum declarations in generated code." },
-        Do_not_emit_outputs_if_any_errors_were_reported: { code: 6008, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_if_any_errors_were_reported_6008", message: "Do not emit outputs if any errors were reported." },
-        Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
-        Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
-        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
-        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
-        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
-        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
-        Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
-        Print_the_compiler_s_version: { code: 6019, category: ts.DiagnosticCategory.Message, key: "Print_the_compiler_s_version_6019", message: "Print the compiler's version." },
-        Compile_the_project_in_the_given_directory: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_in_the_given_directory_6020", message: "Compile the project in the given directory." },
-        Syntax_Colon_0: { code: 6023, category: ts.DiagnosticCategory.Message, key: "Syntax_Colon_0_6023", message: "Syntax: {0}" },
-        options: { code: 6024, category: ts.DiagnosticCategory.Message, key: "options_6024", message: "options" },
-        file: { code: 6025, category: ts.DiagnosticCategory.Message, key: "file_6025", message: "file" },
-        Examples_Colon_0: { code: 6026, category: ts.DiagnosticCategory.Message, key: "Examples_Colon_0_6026", message: "Examples: {0}" },
-        Options_Colon: { code: 6027, category: ts.DiagnosticCategory.Message, key: "Options_Colon_6027", message: "Options:" },
-        Version_0: { code: 6029, category: ts.DiagnosticCategory.Message, key: "Version_0_6029", message: "Version {0}" },
-        Insert_command_line_options_and_files_from_a_file: { code: 6030, category: ts.DiagnosticCategory.Message, key: "Insert_command_line_options_and_files_from_a_file_6030", message: "Insert command line options and files from a file." },
-        File_change_detected_Starting_incremental_compilation: { code: 6032, category: ts.DiagnosticCategory.Message, key: "File_change_detected_Starting_incremental_compilation_6032", message: "File change detected. Starting incremental compilation..." },
-        KIND: { code: 6034, category: ts.DiagnosticCategory.Message, key: "KIND_6034", message: "KIND" },
-        FILE: { code: 6035, category: ts.DiagnosticCategory.Message, key: "FILE_6035", message: "FILE" },
-        VERSION: { code: 6036, category: ts.DiagnosticCategory.Message, key: "VERSION_6036", message: "VERSION" },
-        LOCATION: { code: 6037, category: ts.DiagnosticCategory.Message, key: "LOCATION_6037", message: "LOCATION" },
-        DIRECTORY: { code: 6038, category: ts.DiagnosticCategory.Message, key: "DIRECTORY_6038", message: "DIRECTORY" },
-        Compilation_complete_Watching_for_file_changes: { code: 6042, category: ts.DiagnosticCategory.Message, key: "Compilation_complete_Watching_for_file_changes_6042", message: "Compilation complete. Watching for file changes." },
-        Generates_corresponding_map_file: { code: 6043, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_map_file_6043", message: "Generates corresponding '.map' file." },
-        Compiler_option_0_expects_an_argument: { code: 6044, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_expects_an_argument_6044", message: "Compiler option '{0}' expects an argument." },
-        Unterminated_quoted_string_in_response_file_0: { code: 6045, category: ts.DiagnosticCategory.Error, key: "Unterminated_quoted_string_in_response_file_0_6045", message: "Unterminated quoted string in response file '{0}'." },
-        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}" },
-        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: { code: 6048, category: ts.DiagnosticCategory.Error, key: "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", message: "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'." },
-        Unsupported_locale_0: { code: 6049, category: ts.DiagnosticCategory.Error, key: "Unsupported_locale_0_6049", message: "Unsupported locale '{0}'." },
-        Unable_to_open_file_0: { code: 6050, category: ts.DiagnosticCategory.Error, key: "Unable_to_open_file_0_6050", message: "Unable to open file '{0}'." },
-        Corrupted_locale_file_0: { code: 6051, category: ts.DiagnosticCategory.Error, key: "Corrupted_locale_file_0_6051", message: "Corrupted locale file {0}." },
-        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: { code: 6052, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_expressions_and_declarations_with_an_implied_any_type_6052", message: "Raise error on expressions and declarations with an implied 'any' type." },
-        File_0_not_found: { code: 6053, category: ts.DiagnosticCategory.Error, key: "File_0_not_found_6053", message: "File '{0}' not found." },
-        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: { code: 6054, category: ts.DiagnosticCategory.Error, key: "File_0_has_unsupported_extension_The_only_supported_extensions_are_1_6054", message: "File '{0}' has unsupported extension. The only supported extensions are {1}." },
-        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: { code: 6055, category: ts.DiagnosticCategory.Message, key: "Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures_6055", message: "Suppress noImplicitAny errors for indexing objects lacking index signatures." },
-        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: { code: 6056, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_declarations_for_code_that_has_an_internal_annotation_6056", message: "Do not emit declarations for code that has an '@internal' annotation." },
-        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: { code: 6058, category: ts.DiagnosticCategory.Message, key: "Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir_6058", message: "Specify the root directory of input files. Use to control the output directory structure with --outDir." },
-        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: { code: 6059, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files_6059", message: "File '{0}' is not under 'rootDir' '{1}'. 'rootDir' is expected to contain all source files." },
-        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: { code: 6060, category: ts.DiagnosticCategory.Message, key: "Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix_6060", message: "Specify the end of line sequence to be used when emitting files: 'CRLF' (dos) or 'LF' (unix)." },
-        NEWLINE: { code: 6061, category: ts.DiagnosticCategory.Message, key: "NEWLINE_6061", message: "NEWLINE" },
-        Option_0_can_only_be_specified_in_tsconfig_json_file: { code: 6064, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_specified_in_tsconfig_json_file_6064", message: "Option '{0}' can only be specified in 'tsconfig.json' file." },
-        Enables_experimental_support_for_ES7_decorators: { code: 6065, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_decorators_6065", message: "Enables experimental support for ES7 decorators." },
-        Enables_experimental_support_for_emitting_type_metadata_for_decorators: { code: 6066, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_emitting_type_metadata_for_decorators_6066", message: "Enables experimental support for emitting type metadata for decorators." },
-        Enables_experimental_support_for_ES7_async_functions: { code: 6068, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_async_functions_6068", message: "Enables experimental support for ES7 async functions." },
-        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: { code: 6069, category: ts.DiagnosticCategory.Message, key: "Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6_6069", message: "Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6)." },
-        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: { code: 6070, category: ts.DiagnosticCategory.Message, key: "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", message: "Initializes a TypeScript project and creates a tsconfig.json file." },
-        Successfully_created_a_tsconfig_json_file: { code: 6071, category: ts.DiagnosticCategory.Message, key: "Successfully_created_a_tsconfig_json_file_6071", message: "Successfully created a tsconfig.json file." },
-        Suppress_excess_property_checks_for_object_literals: { code: 6072, category: ts.DiagnosticCategory.Message, key: "Suppress_excess_property_checks_for_object_literals_6072", message: "Suppress excess property checks for object literals." },
-        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context. (experimental)" },
-        Do_not_report_errors_on_unused_labels: { code: 6074, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unused_labels_6074", message: "Do not report errors on unused labels." },
-        Report_error_when_not_all_code_paths_in_function_return_a_value: { code: 6075, category: ts.DiagnosticCategory.Message, key: "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", message: "Report error when not all code paths in function return a value." },
-        Report_errors_for_fallthrough_cases_in_switch_statement: { code: 6076, category: ts.DiagnosticCategory.Message, key: "Report_errors_for_fallthrough_cases_in_switch_statement_6076", message: "Report errors for fallthrough cases in switch statement." },
-        Do_not_report_errors_on_unreachable_code: { code: 6077, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unreachable_code_6077", message: "Do not report errors on unreachable code." },
-        Disallow_inconsistently_cased_references_to_the_same_file: { code: 6078, category: ts.DiagnosticCategory.Message, key: "Disallow_inconsistently_cased_references_to_the_same_file_6078", message: "Disallow inconsistently-cased references to the same file." },
-        Specify_library_files_to_be_included_in_the_compilation_Colon: { code: 6079, category: ts.DiagnosticCategory.Message, key: "Specify_library_files_to_be_included_in_the_compilation_Colon_6079", message: "Specify library files to be included in the compilation: " },
-        Specify_JSX_code_generation_Colon_preserve_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_or_react_6080", message: "Specify JSX code generation: 'preserve' or 'react'" },
-        Only_amd_and_system_modules_are_supported_alongside_0: { code: 6082, category: ts.DiagnosticCategory.Error, key: "Only_amd_and_system_modules_are_supported_alongside_0_6082", message: "Only 'amd' and 'system' modules are supported alongside --{0}." },
-        Base_directory_to_resolve_non_absolute_module_names: { code: 6083, category: ts.DiagnosticCategory.Message, key: "Base_directory_to_resolve_non_absolute_module_names_6083", message: "Base directory to resolve non-absolute module names." },
-        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084", message: "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit" },
-        Enable_tracing_of_the_name_resolution_process: { code: 6085, category: ts.DiagnosticCategory.Message, key: "Enable_tracing_of_the_name_resolution_process_6085", message: "Enable tracing of the name resolution process." },
-        Resolving_module_0_from_1: { code: 6086, category: ts.DiagnosticCategory.Message, key: "Resolving_module_0_from_1_6086", message: "======== Resolving module '{0}' from '{1}'. ========" },
-        Explicitly_specified_module_resolution_kind_Colon_0: { code: 6087, category: ts.DiagnosticCategory.Message, key: "Explicitly_specified_module_resolution_kind_Colon_0_6087", message: "Explicitly specified module resolution kind: '{0}'." },
-        Module_resolution_kind_is_not_specified_using_0: { code: 6088, category: ts.DiagnosticCategory.Message, key: "Module_resolution_kind_is_not_specified_using_0_6088", message: "Module resolution kind is not specified, using '{0}'." },
-        Module_name_0_was_successfully_resolved_to_1: { code: 6089, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_successfully_resolved_to_1_6089", message: "======== Module name '{0}' was successfully resolved to '{1}'. ========" },
-        Module_name_0_was_not_resolved: { code: 6090, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_not_resolved_6090", message: "======== Module name '{0}' was not resolved. ========" },
-        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: { code: 6091, category: ts.DiagnosticCategory.Message, key: "paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0_6091", message: "'paths' option is specified, looking for a pattern to match module name '{0}'." },
-        Module_name_0_matched_pattern_1: { code: 6092, category: ts.DiagnosticCategory.Message, key: "Module_name_0_matched_pattern_1_6092", message: "Module name '{0}', matched pattern '{1}'." },
-        Trying_substitution_0_candidate_module_location_Colon_1: { code: 6093, category: ts.DiagnosticCategory.Message, key: "Trying_substitution_0_candidate_module_location_Colon_1_6093", message: "Trying substitution '{0}', candidate module location: '{1}'." },
-        Resolving_module_name_0_relative_to_base_url_1_2: { code: 6094, category: ts.DiagnosticCategory.Message, key: "Resolving_module_name_0_relative_to_base_url_1_2_6094", message: "Resolving module name '{0}' relative to base url '{1}' - '{2}'." },
-        Loading_module_as_file_Slash_folder_candidate_module_location_0: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095", message: "Loading module as file / folder, candidate module location '{0}'." },
-        File_0_does_not_exist: { code: 6096, category: ts.DiagnosticCategory.Message, key: "File_0_does_not_exist_6096", message: "File '{0}' does not exist." },
-        File_0_exist_use_it_as_a_name_resolution_result: { code: 6097, category: ts.DiagnosticCategory.Message, key: "File_0_exist_use_it_as_a_name_resolution_result_6097", message: "File '{0}' exist - use it as a name resolution result." },
-        Loading_module_0_from_node_modules_folder: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_6098", message: "Loading module '{0}' from 'node_modules' folder." },
-        Found_package_json_at_0: { code: 6099, category: ts.DiagnosticCategory.Message, key: "Found_package_json_at_0_6099", message: "Found 'package.json' at '{0}'." },
-        package_json_does_not_have_types_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_types_field_6100", message: "'package.json' does not have 'types' field." },
-        package_json_has_0_field_1_that_references_2: { code: 6101, category: ts.DiagnosticCategory.Message, key: "package_json_has_0_field_1_that_references_2_6101", message: "'package.json' has '{0}' field '{1}' that references '{2}'." },
-        Allow_javascript_files_to_be_compiled: { code: 6102, category: ts.DiagnosticCategory.Message, key: "Allow_javascript_files_to_be_compiled_6102", message: "Allow javascript files to be compiled." },
-        Option_0_should_have_array_of_strings_as_a_value: { code: 6103, category: ts.DiagnosticCategory.Error, key: "Option_0_should_have_array_of_strings_as_a_value_6103", message: "Option '{0}' should have array of strings as a value." },
-        Checking_if_0_is_the_longest_matching_prefix_for_1_2: { code: 6104, category: ts.DiagnosticCategory.Message, key: "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", message: "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'." },
-        Expected_type_of_0_field_in_package_json_to_be_string_got_1: { code: 6105, category: ts.DiagnosticCategory.Message, key: "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", message: "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'." },
-        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'" },
-        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'" },
-        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'" },
-        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'" },
-        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'" },
-        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed" },
-        Do_not_emit_use_strict_directives_in_module_output: { code: 6112, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_use_strict_directives_in_module_output_6112", message: "Do not emit 'use strict' directives in module output." },
-        Enable_strict_null_checks: { code: 6113, category: ts.DiagnosticCategory.Message, key: "Enable_strict_null_checks_6113", message: "Enable strict null checks." },
-        Unknown_option_excludes_Did_you_mean_exclude: { code: 6114, category: ts.DiagnosticCategory.Error, key: "Unknown_option_excludes_Did_you_mean_exclude_6114", message: "Unknown option 'excludes'. Did you mean 'exclude'?" },
-        Raise_error_on_this_expressions_with_an_implied_any_type: { code: 6115, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_this_expressions_with_an_implied_any_type_6115", message: "Raise error on 'this' expressions with an implied 'any' type." },
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: { code: 6116, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_2_6116", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory '{2}'. ========" },
-        Resolving_using_primary_search_paths: { code: 6117, category: ts.DiagnosticCategory.Message, key: "Resolving_using_primary_search_paths_6117", message: "Resolving using primary search paths..." },
-        Resolving_from_node_modules_folder: { code: 6118, category: ts.DiagnosticCategory.Message, key: "Resolving_from_node_modules_folder_6118", message: "Resolving from node_modules folder..." },
-        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: { code: 6119, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", message: "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========" },
-        Type_reference_directive_0_was_not_resolved: { code: 6120, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_not_resolved_6120", message: "======== Type reference directive '{0}' was not resolved. ========" },
-        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'" },
-        Root_directory_cannot_be_determined_skipping_primary_search_paths: { code: 6122, category: ts.DiagnosticCategory.Message, key: "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", message: "Root directory cannot be determined, skipping primary search paths." },
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: { code: 6123, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========" },
-        Type_declaration_files_to_be_included_in_compilation: { code: 6124, category: ts.DiagnosticCategory.Message, key: "Type_declaration_files_to_be_included_in_compilation_6124", message: "Type declaration files to be included in compilation." },
-        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'" },
-        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: { code: 6126, category: ts.DiagnosticCategory.Message, key: "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", message: "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder." },
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: { code: 6127, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", message: "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========" },
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
-        The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
-        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
-        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
-        Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
-        Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
-        Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
-        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: { code: 7009, category: ts.DiagnosticCategory.Error, key: "new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type_7009", message: "'new' expression, whose target lacks a construct signature, implicitly has an 'any' type." },
-        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: { code: 7010, category: ts.DiagnosticCategory.Error, key: "_0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type_7010", message: "'{0}', which lacks return-type annotation, implicitly has an '{1}' return type." },
-        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: { code: 7011, category: ts.DiagnosticCategory.Error, key: "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", message: "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type." },
-        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7013, category: ts.DiagnosticCategory.Error, key: "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", message: "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type." },
-        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: { code: 7015, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", message: "Element implicitly has an 'any' type because index expression is not of type 'number'." },
-        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation: { code: 7016, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation_7016", message: "Property '{0}' implicitly has type 'any', because its 'set' accessor lacks a type annotation." },
-        Index_signature_of_object_type_implicitly_has_an_any_type: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Index_signature_of_object_type_implicitly_has_an_any_type_7017", message: "Index signature of object type implicitly has an 'any' type." },
-        Object_literal_s_property_0_implicitly_has_an_1_type: { code: 7018, category: ts.DiagnosticCategory.Error, key: "Object_literal_s_property_0_implicitly_has_an_1_type_7018", message: "Object literal's property '{0}' implicitly has an '{1}' type." },
-        Rest_parameter_0_implicitly_has_an_any_type: { code: 7019, category: ts.DiagnosticCategory.Error, key: "Rest_parameter_0_implicitly_has_an_any_type_7019", message: "Rest parameter '{0}' implicitly has an 'any[]' type." },
-        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7020, category: ts.DiagnosticCategory.Error, key: "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", message: "Call signature, which lacks return-type annotation, implicitly has an 'any' return type." },
-        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: { code: 7022, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or__7022", message: "'{0}' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer." },
-        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7023, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", message: "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
-        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7024, category: ts.DiagnosticCategory.Error, key: "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", message: "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
-        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: { code: 7025, category: ts.DiagnosticCategory.Error, key: "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", message: "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type." },
-        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists" },
-        Unreachable_code_detected: { code: 7027, category: ts.DiagnosticCategory.Error, key: "Unreachable_code_detected_7027", message: "Unreachable code detected." },
-        Unused_label: { code: 7028, category: ts.DiagnosticCategory.Error, key: "Unused_label_7028", message: "Unused label." },
-        Fallthrough_case_in_switch: { code: 7029, category: ts.DiagnosticCategory.Error, key: "Fallthrough_case_in_switch_7029", message: "Fallthrough case in switch." },
-        Not_all_code_paths_return_a_value: { code: 7030, category: ts.DiagnosticCategory.Error, key: "Not_all_code_paths_return_a_value_7030", message: "Not all code paths return a value." },
-        Binding_element_0_implicitly_has_an_1_type: { code: 7031, category: ts.DiagnosticCategory.Error, key: "Binding_element_0_implicitly_has_an_1_type_7031", message: "Binding element '{0}' implicitly has an '{1}' type." },
-        You_cannot_rename_this_element: { code: 8000, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_this_element_8000", message: "You cannot rename this element." },
-        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: { code: 8001, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", message: "You cannot rename elements that are defined in the standard TypeScript library." },
-        import_can_only_be_used_in_a_ts_file: { code: 8002, category: ts.DiagnosticCategory.Error, key: "import_can_only_be_used_in_a_ts_file_8002", message: "'import ... =' can only be used in a .ts file." },
-        export_can_only_be_used_in_a_ts_file: { code: 8003, category: ts.DiagnosticCategory.Error, key: "export_can_only_be_used_in_a_ts_file_8003", message: "'export=' can only be used in a .ts file." },
-        type_parameter_declarations_can_only_be_used_in_a_ts_file: { code: 8004, category: ts.DiagnosticCategory.Error, key: "type_parameter_declarations_can_only_be_used_in_a_ts_file_8004", message: "'type parameter declarations' can only be used in a .ts file." },
-        implements_clauses_can_only_be_used_in_a_ts_file: { code: 8005, category: ts.DiagnosticCategory.Error, key: "implements_clauses_can_only_be_used_in_a_ts_file_8005", message: "'implements clauses' can only be used in a .ts file." },
-        interface_declarations_can_only_be_used_in_a_ts_file: { code: 8006, category: ts.DiagnosticCategory.Error, key: "interface_declarations_can_only_be_used_in_a_ts_file_8006", message: "'interface declarations' can only be used in a .ts file." },
-        module_declarations_can_only_be_used_in_a_ts_file: { code: 8007, category: ts.DiagnosticCategory.Error, key: "module_declarations_can_only_be_used_in_a_ts_file_8007", message: "'module declarations' can only be used in a .ts file." },
-        type_aliases_can_only_be_used_in_a_ts_file: { code: 8008, category: ts.DiagnosticCategory.Error, key: "type_aliases_can_only_be_used_in_a_ts_file_8008", message: "'type aliases' can only be used in a .ts file." },
-        _0_can_only_be_used_in_a_ts_file: { code: 8009, category: ts.DiagnosticCategory.Error, key: "_0_can_only_be_used_in_a_ts_file_8009", message: "'{0}' can only be used in a .ts file." },
-        types_can_only_be_used_in_a_ts_file: { code: 8010, category: ts.DiagnosticCategory.Error, key: "types_can_only_be_used_in_a_ts_file_8010", message: "'types' can only be used in a .ts file." },
-        type_arguments_can_only_be_used_in_a_ts_file: { code: 8011, category: ts.DiagnosticCategory.Error, key: "type_arguments_can_only_be_used_in_a_ts_file_8011", message: "'type arguments' can only be used in a .ts file." },
-        parameter_modifiers_can_only_be_used_in_a_ts_file: { code: 8012, category: ts.DiagnosticCategory.Error, key: "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", message: "'parameter modifiers' can only be used in a .ts file." },
-        property_declarations_can_only_be_used_in_a_ts_file: { code: 8014, category: ts.DiagnosticCategory.Error, key: "property_declarations_can_only_be_used_in_a_ts_file_8014", message: "'property declarations' can only be used in a .ts file." },
-        enum_declarations_can_only_be_used_in_a_ts_file: { code: 8015, category: ts.DiagnosticCategory.Error, key: "enum_declarations_can_only_be_used_in_a_ts_file_8015", message: "'enum declarations' can only be used in a .ts file." },
-        type_assertion_expressions_can_only_be_used_in_a_ts_file: { code: 8016, category: ts.DiagnosticCategory.Error, key: "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", message: "'type assertion expressions' can only be used in a .ts file." },
-        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses." },
-        class_expressions_are_not_currently_supported: { code: 9003, category: ts.DiagnosticCategory.Error, key: "class_expressions_are_not_currently_supported_9003", message: "'class' expressions are not currently supported." },
-        JSX_attributes_must_only_be_assigned_a_non_empty_expression: { code: 17000, category: ts.DiagnosticCategory.Error, key: "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", message: "JSX attributes must only be assigned a non-empty 'expression'." },
-        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: { code: 17001, category: ts.DiagnosticCategory.Error, key: "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", message: "JSX elements cannot have multiple attributes with the same name." },
-        Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: ts.DiagnosticCategory.Error, key: "Expected_corresponding_JSX_closing_tag_for_0_17002", message: "Expected corresponding JSX closing tag for '{0}'." },
-        JSX_attribute_expected: { code: 17003, category: ts.DiagnosticCategory.Error, key: "JSX_attribute_expected_17003", message: "JSX attribute expected." },
-        Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: ts.DiagnosticCategory.Error, key: "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", message: "Cannot use JSX unless the '--jsx' flag is provided." },
-        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'" },
-        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17006, category: ts.DiagnosticCategory.Error, key: "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", message: "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
-        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17007, category: ts.DiagnosticCategory.Error, key: "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", message: "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
-        JSX_element_0_has_no_corresponding_closing_tag: { code: 17008, category: ts.DiagnosticCategory.Error, key: "JSX_element_0_has_no_corresponding_closing_tag_17008", message: "JSX element '{0}' has no corresponding closing tag." },
-        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: { code: 17009, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", message: "'super' must be called before accessing 'this' in the constructor of a derived class." },
-        Unknown_typing_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_typing_option_0_17010", message: "Unknown typing option '{0}'." }
-    };
-})(ts || (ts = {}));
-/// <reference path="core.ts"/>
-/// <reference path="diagnosticInformationMap.generated.ts"/>
-var ts;
-(function (ts) {
-    /* @internal */
-    function tokenIsIdentifierOrKeyword(token) {
-        return token >= 69 /* Identifier */;
-    }
-    ts.tokenIsIdentifierOrKeyword = tokenIsIdentifierOrKeyword;
-    var textToToken = {
-        "abstract": 115 /* AbstractKeyword */,
-        "any": 117 /* AnyKeyword */,
-        "as": 116 /* AsKeyword */,
-        "boolean": 120 /* BooleanKeyword */,
-        "break": 70 /* BreakKeyword */,
-        "case": 71 /* CaseKeyword */,
-        "catch": 72 /* CatchKeyword */,
-        "class": 73 /* ClassKeyword */,
-        "continue": 75 /* ContinueKeyword */,
-        "const": 74 /* ConstKeyword */,
-        "constructor": 121 /* ConstructorKeyword */,
-        "debugger": 76 /* DebuggerKeyword */,
-        "declare": 122 /* DeclareKeyword */,
-        "default": 77 /* DefaultKeyword */,
-        "delete": 78 /* DeleteKeyword */,
-        "do": 79 /* DoKeyword */,
-        "else": 80 /* ElseKeyword */,
-        "enum": 81 /* EnumKeyword */,
-        "export": 82 /* ExportKeyword */,
-        "extends": 83 /* ExtendsKeyword */,
-        "false": 84 /* FalseKeyword */,
-        "finally": 85 /* FinallyKeyword */,
-        "for": 86 /* ForKeyword */,
-        "from": 136 /* FromKeyword */,
-        "function": 87 /* FunctionKeyword */,
-        "get": 123 /* GetKeyword */,
-        "if": 88 /* IfKeyword */,
-        "implements": 106 /* ImplementsKeyword */,
-        "import": 89 /* ImportKeyword */,
-        "in": 90 /* InKeyword */,
-        "instanceof": 91 /* InstanceOfKeyword */,
-        "interface": 107 /* InterfaceKeyword */,
-        "is": 124 /* IsKeyword */,
-        "let": 108 /* LetKeyword */,
-        "module": 125 /* ModuleKeyword */,
-        "namespace": 126 /* NamespaceKeyword */,
-        "never": 127 /* NeverKeyword */,
-        "new": 92 /* NewKeyword */,
-        "null": 93 /* NullKeyword */,
-        "number": 130 /* NumberKeyword */,
-        "package": 109 /* PackageKeyword */,
-        "private": 110 /* PrivateKeyword */,
-        "protected": 111 /* ProtectedKeyword */,
-        "public": 112 /* PublicKeyword */,
-        "readonly": 128 /* ReadonlyKeyword */,
-        "require": 129 /* RequireKeyword */,
-        "global": 137 /* GlobalKeyword */,
-        "return": 94 /* ReturnKeyword */,
-        "set": 131 /* SetKeyword */,
-        "static": 113 /* StaticKeyword */,
-        "string": 132 /* StringKeyword */,
-        "super": 95 /* SuperKeyword */,
-        "switch": 96 /* SwitchKeyword */,
-        "symbol": 133 /* SymbolKeyword */,
-        "this": 97 /* ThisKeyword */,
-        "throw": 98 /* ThrowKeyword */,
-        "true": 99 /* TrueKeyword */,
-        "try": 100 /* TryKeyword */,
-        "type": 134 /* TypeKeyword */,
-        "typeof": 101 /* TypeOfKeyword */,
-        "undefined": 135 /* UndefinedKeyword */,
-        "var": 102 /* VarKeyword */,
-        "void": 103 /* VoidKeyword */,
-        "while": 104 /* WhileKeyword */,
-        "with": 105 /* WithKeyword */,
-        "yield": 114 /* YieldKeyword */,
-        "async": 118 /* AsyncKeyword */,
-        "await": 119 /* AwaitKeyword */,
-        "of": 138 /* OfKeyword */,
-        "{": 15 /* OpenBraceToken */,
-        "}": 16 /* CloseBraceToken */,
-        "(": 17 /* OpenParenToken */,
-        ")": 18 /* CloseParenToken */,
-        "[": 19 /* OpenBracketToken */,
-        "]": 20 /* CloseBracketToken */,
-        ".": 21 /* DotToken */,
-        "...": 22 /* DotDotDotToken */,
-        ";": 23 /* SemicolonToken */,
-        ",": 24 /* CommaToken */,
-        "<": 25 /* LessThanToken */,
-        ">": 27 /* GreaterThanToken */,
-        "<=": 28 /* LessThanEqualsToken */,
-        ">=": 29 /* GreaterThanEqualsToken */,
-        "==": 30 /* EqualsEqualsToken */,
-        "!=": 31 /* ExclamationEqualsToken */,
-        "===": 32 /* EqualsEqualsEqualsToken */,
-        "!==": 33 /* ExclamationEqualsEqualsToken */,
-        "=>": 34 /* EqualsGreaterThanToken */,
-        "+": 35 /* PlusToken */,
-        "-": 36 /* MinusToken */,
-        "**": 38 /* AsteriskAsteriskToken */,
-        "*": 37 /* AsteriskToken */,
-        "/": 39 /* SlashToken */,
-        "%": 40 /* PercentToken */,
-        "++": 41 /* PlusPlusToken */,
-        "--": 42 /* MinusMinusToken */,
-        "<<": 43 /* LessThanLessThanToken */,
-        "</": 26 /* LessThanSlashToken */,
-        ">>": 44 /* GreaterThanGreaterThanToken */,
-        ">>>": 45 /* GreaterThanGreaterThanGreaterThanToken */,
-        "&": 46 /* AmpersandToken */,
-        "|": 47 /* BarToken */,
-        "^": 48 /* CaretToken */,
-        "!": 49 /* ExclamationToken */,
-        "~": 50 /* TildeToken */,
-        "&&": 51 /* AmpersandAmpersandToken */,
-        "||": 52 /* BarBarToken */,
-        "?": 53 /* QuestionToken */,
-        ":": 54 /* ColonToken */,
-        "=": 56 /* EqualsToken */,
-        "+=": 57 /* PlusEqualsToken */,
-        "-=": 58 /* MinusEqualsToken */,
-        "*=": 59 /* AsteriskEqualsToken */,
-        "**=": 60 /* AsteriskAsteriskEqualsToken */,
-        "/=": 61 /* SlashEqualsToken */,
-        "%=": 62 /* PercentEqualsToken */,
-        "<<=": 63 /* LessThanLessThanEqualsToken */,
-        ">>=": 64 /* GreaterThanGreaterThanEqualsToken */,
-        ">>>=": 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */,
-        "&=": 66 /* AmpersandEqualsToken */,
-        "|=": 67 /* BarEqualsToken */,
-        "^=": 68 /* CaretEqualsToken */,
-        "@": 55 /* AtToken */
-    };
-    /*
-        As per ECMAScript Language Specification 3th Edition, Section 7.6: Identifiers
-        IdentifierStart ::
-            Can contain Unicode 3.0.0  categories:
-            Uppercase letter (Lu),
-            Lowercase letter (Ll),
-            Titlecase letter (Lt),
-            Modifier letter (Lm),
-            Other letter (Lo), or
-            Letter number (Nl).
-        IdentifierPart :: =
-            Can contain IdentifierStart + Unicode 3.0.0  categories:
-            Non-spacing mark (Mn),
-            Combining spacing mark (Mc),
-            Decimal number (Nd), or
-            Connector punctuation (Pc).
-
-        Codepoint ranges for ES3 Identifiers are extracted from the Unicode 3.0.0 specification at:
-        http://www.unicode.org/Public/3.0-Update/UnicodeData-3.0.0.txt
-    */
-    var unicodeES3IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1610, 1649, 1747, 1749, 1749, 1765, 1766, 1786, 1788, 1808, 1808, 1810, 1836, 1920, 1957, 2309, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2784, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3294, 3294, 3296, 3297, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3424, 3425, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3805, 3840, 3840, 3904, 3911, 3913, 3946, 3976, 3979, 4096, 4129, 4131, 4135, 4137, 4138, 4176, 4181, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6067, 6176, 6263, 6272, 6312, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8319, 8319, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12346, 12353, 12436, 12445, 12446, 12449, 12538, 12540, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65138, 65140, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    var unicodeES3IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 768, 846, 864, 866, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1155, 1158, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1441, 1443, 1465, 1467, 1469, 1471, 1471, 1473, 1474, 1476, 1476, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1621, 1632, 1641, 1648, 1747, 1749, 1756, 1759, 1768, 1770, 1773, 1776, 1788, 1808, 1836, 1840, 1866, 1920, 1968, 2305, 2307, 2309, 2361, 2364, 2381, 2384, 2388, 2392, 2403, 2406, 2415, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2492, 2494, 2500, 2503, 2504, 2507, 2509, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2562, 2562, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2649, 2652, 2654, 2654, 2662, 2676, 2689, 2691, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2784, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2876, 2883, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2913, 2918, 2927, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3031, 3031, 3047, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3134, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3168, 3169, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3262, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3297, 3302, 3311, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3390, 3395, 3398, 3400, 3402, 3405, 3415, 3415, 3424, 3425, 3430, 3439, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3805, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3946, 3953, 3972, 3974, 3979, 3984, 3991, 3993, 4028, 4038, 4038, 4096, 4129, 4131, 4135, 4137, 4138, 4140, 4146, 4150, 4153, 4160, 4169, 4176, 4185, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 4969, 4977, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6099, 6112, 6121, 6160, 6169, 6176, 6263, 6272, 6313, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8255, 8256, 8319, 8319, 8400, 8412, 8417, 8417, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12346, 12353, 12436, 12441, 12442, 12445, 12446, 12449, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65056, 65059, 65075, 65076, 65101, 65103, 65136, 65138, 65140, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65381, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    /*
-        As per ECMAScript Language Specification 5th Edition, Section 7.6: ISyntaxToken Names and Identifiers
-        IdentifierStart ::
-            Can contain Unicode 6.2  categories:
-            Uppercase letter (Lu),
-            Lowercase letter (Ll),
-            Titlecase letter (Lt),
-            Modifier letter (Lm),
-            Other letter (Lo), or
-            Letter number (Nl).
-        IdentifierPart ::
-            Can contain IdentifierStart + Unicode 6.2  categories:
-            Non-spacing mark (Mn),
-            Combining spacing mark (Mc),
-            Decimal number (Nd),
-            Connector punctuation (Pc),
-            <ZWNJ>, or
-            <ZWJ>.
-
-        Codepoint ranges for ES5 Identifiers are extracted from the Unicode 6.2 specification at:
-        http://www.unicode.org/Public/6.2.0/ucd/UnicodeData.txt
-    */
-    var unicodeES5IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389, 6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688, 6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141, 7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015, 43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259, 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520, 43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695, 43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739, 43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    var unicodeES5IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520, 1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788, 1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112, 2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423, 2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929, 2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424, 3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272, 6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    function lookupInUnicodeMap(code, map) {
-        // Bail out quickly if it couldn't possibly be in the map.
-        if (code < map[0]) {
-            return false;
-        }
-        // Perform binary search in one of the Unicode range maps
-        var lo = 0;
-        var hi = map.length;
-        var mid;
-        while (lo + 1 < hi) {
-            mid = lo + (hi - lo) / 2;
-            // mid has to be even to catch a range's beginning
-            mid -= mid % 2;
-            if (map[mid] <= code && code <= map[mid + 1]) {
-                return true;
-            }
-            if (code < map[mid]) {
-                hi = mid;
-            }
-            else {
-                lo = mid + 2;
-            }
-        }
-        return false;
-    }
-    /* @internal */ function isUnicodeIdentifierStart(code, languageVersion) {
-        return languageVersion >= 1 /* ES5 */ ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
-    }
-    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
-    function isUnicodeIdentifierPart(code, languageVersion) {
-        return languageVersion >= 1 /* ES5 */ ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
-    }
-    function makeReverseMap(source) {
-        var result = [];
-        for (var name_4 in source) {
-            if (source.hasOwnProperty(name_4)) {
-                result[source[name_4]] = name_4;
-            }
-        }
-        return result;
-    }
-    var tokenStrings = makeReverseMap(textToToken);
-    function tokenToString(t) {
-        return tokenStrings[t];
-    }
-    ts.tokenToString = tokenToString;
-    /* @internal */
-    function stringToToken(s) {
-        return textToToken[s];
-    }
-    ts.stringToToken = stringToToken;
-    /* @internal */
-    function computeLineStarts(text) {
-        var result = new Array();
-        var pos = 0;
-        var lineStart = 0;
-        while (pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                case 10 /* lineFeed */:
-                    result.push(lineStart);
-                    lineStart = pos;
-                    break;
-                default:
-                    if (ch > 127 /* maxAsciiCharacter */ && isLineBreak(ch)) {
-                        result.push(lineStart);
-                        lineStart = pos;
-                    }
-                    break;
-            }
-        }
-        result.push(lineStart);
-        return result;
-    }
-    ts.computeLineStarts = computeLineStarts;
-    function getPositionOfLineAndCharacter(sourceFile, line, character) {
-        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
-    }
-    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
-    /* @internal */
-    function computePositionOfLineAndCharacter(lineStarts, line, character) {
-        ts.Debug.assert(line >= 0 && line < lineStarts.length);
-        return lineStarts[line] + character;
-    }
-    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
-    /* @internal */
-    function getLineStarts(sourceFile) {
-        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
-    }
-    ts.getLineStarts = getLineStarts;
-    /* @internal */
-    /**
-     * We assume the first line starts at position 0 and 'position' is non-negative.
-     */
-    function computeLineAndCharacterOfPosition(lineStarts, position) {
-        var lineNumber = ts.binarySearch(lineStarts, position);
-        if (lineNumber < 0) {
-            // If the actual position was not found,
-            // the binary search returns the 2's-complement of the next line start
-            // e.g. if the line starts at [5, 10, 23, 80] and the position requested was 20
-            // then the search will return -2.
-            //
-            // We want the index of the previous line start, so we subtract 1.
-            // Review 2's-complement if this is confusing.
-            lineNumber = ~lineNumber - 1;
-            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
-        }
-        return {
-            line: lineNumber,
-            character: position - lineStarts[lineNumber]
-        };
-    }
-    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
-    function getLineAndCharacterOfPosition(sourceFile, position) {
-        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
-    }
-    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-    function isWhiteSpace(ch) {
-        // Note: nextLine is in the Zs space, and should be considered to be a whitespace.
-        // It is explicitly not a line-break as it isn't in the exact set specified by EcmaScript.
-        return ch === 32 /* space */ ||
-            ch === 9 /* tab */ ||
-            ch === 11 /* verticalTab */ ||
-            ch === 12 /* formFeed */ ||
-            ch === 160 /* nonBreakingSpace */ ||
-            ch === 133 /* nextLine */ ||
-            ch === 5760 /* ogham */ ||
-            ch >= 8192 /* enQuad */ && ch <= 8203 /* zeroWidthSpace */ ||
-            ch === 8239 /* narrowNoBreakSpace */ ||
-            ch === 8287 /* mathematicalSpace */ ||
-            ch === 12288 /* ideographicSpace */ ||
-            ch === 65279 /* byteOrderMark */;
-    }
-    ts.isWhiteSpace = isWhiteSpace;
-    function isLineBreak(ch) {
-        // ES5 7.3:
-        // The ECMAScript line terminator characters are listed in Table 3.
-        //     Table 3: Line Terminator Characters
-        //     Code Unit Value     Name                    Formal Name
-        //     \u000A              Line Feed               <LF>
-        //     \u000D              Carriage Return         <CR>
-        //     \u2028              Line separator          <LS>
-        //     \u2029              Paragraph separator     <PS>
-        // Only the characters in Table 3 are treated as line terminators. Other new line or line
-        // breaking characters are treated as white space but not as line terminators.
-        return ch === 10 /* lineFeed */ ||
-            ch === 13 /* carriageReturn */ ||
-            ch === 8232 /* lineSeparator */ ||
-            ch === 8233 /* paragraphSeparator */;
-    }
-    ts.isLineBreak = isLineBreak;
-    function isDigit(ch) {
-        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
-    }
-    /* @internal */
-    function isOctalDigit(ch) {
-        return ch >= 48 /* _0 */ && ch <= 55 /* _7 */;
-    }
-    ts.isOctalDigit = isOctalDigit;
-    function couldStartTrivia(text, pos) {
-        // Keep in sync with skipTrivia
-        var ch = text.charCodeAt(pos);
-        switch (ch) {
-            case 13 /* carriageReturn */:
-            case 10 /* lineFeed */:
-            case 9 /* tab */:
-            case 11 /* verticalTab */:
-            case 12 /* formFeed */:
-            case 32 /* space */:
-            case 47 /* slash */:
-            // starts of normal trivia
-            case 60 /* lessThan */:
-            case 61 /* equals */:
-            case 62 /* greaterThan */:
-                // Starts of conflict marker trivia
-                return true;
-            case 35 /* hash */:
-                // Only if its the beginning can we have #! trivia
-                return pos === 0;
-            default:
-                return ch > 127 /* maxAsciiCharacter */;
-        }
-    }
-    ts.couldStartTrivia = couldStartTrivia;
-    /* @internal */
-    function skipTrivia(text, pos, stopAfterLineBreak) {
-        // Using ! with a greater than test is a fast way of testing the following conditions:
-        //  pos === undefined || pos === null || isNaN(pos) || pos < 0;
-        if (!(pos >= 0)) {
-            return pos;
-        }
-        // Keep in sync with couldStartTrivia
-        while (true) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                case 10 /* lineFeed */:
-                    pos++;
-                    if (stopAfterLineBreak) {
-                        return pos;
-                    }
-                    continue;
-                case 9 /* tab */:
-                case 11 /* verticalTab */:
-                case 12 /* formFeed */:
-                case 32 /* space */:
-                    pos++;
-                    continue;
-                case 47 /* slash */:
-                    if (text.charCodeAt(pos + 1) === 47 /* slash */) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (isLineBreak(text.charCodeAt(pos))) {
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
-                                pos += 2;
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    break;
-                case 60 /* lessThan */:
-                case 61 /* equals */:
-                case 62 /* greaterThan */:
-                    if (isConflictMarkerTrivia(text, pos)) {
-                        pos = scanConflictMarkerTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                case 35 /* hash */:
-                    if (pos === 0 && isShebangTrivia(text, pos)) {
-                        pos = scanShebangTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                default:
-                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpace(ch) || isLineBreak(ch))) {
-                        pos++;
-                        continue;
-                    }
-                    break;
-            }
-            return pos;
-        }
-    }
-    ts.skipTrivia = skipTrivia;
-    // All conflict markers consist of the same character repeated seven times.  If it is
-    // a <<<<<<< or >>>>>>> marker then it is also followed by a space.
-    var mergeConflictMarkerLength = "<<<<<<<".length;
-    function isConflictMarkerTrivia(text, pos) {
-        ts.Debug.assert(pos >= 0);
-        // Conflict markers must be at the start of a line.
-        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
-            var ch = text.charCodeAt(pos);
-            if ((pos + mergeConflictMarkerLength) < text.length) {
-                for (var i = 0, n = mergeConflictMarkerLength; i < n; i++) {
-                    if (text.charCodeAt(pos + i) !== ch) {
-                        return false;
-                    }
-                }
-                return ch === 61 /* equals */ ||
-                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32 /* space */;
-            }
-        }
-        return false;
-    }
-    function scanConflictMarkerTrivia(text, pos, error) {
-        if (error) {
-            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
-        }
-        var ch = text.charCodeAt(pos);
-        var len = text.length;
-        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
-            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
-                pos++;
-            }
-        }
-        else {
-            ts.Debug.assert(ch === 61 /* equals */);
-            // Consume everything from the start of the mid-conflict marker to the start of the next
-            // end-conflict marker.
-            while (pos < len) {
-                var ch_1 = text.charCodeAt(pos);
-                if (ch_1 === 62 /* greaterThan */ && isConflictMarkerTrivia(text, pos)) {
-                    break;
-                }
-                pos++;
-            }
-        }
-        return pos;
-    }
-    var shebangTriviaRegex = /^#!.*/;
-    function isShebangTrivia(text, pos) {
-        // Shebangs check must only be done at the start of the file
-        ts.Debug.assert(pos === 0);
-        return shebangTriviaRegex.test(text);
-    }
-    function scanShebangTrivia(text, pos) {
-        var shebang = shebangTriviaRegex.exec(text)[0];
-        pos = pos + shebang.length;
-        return pos;
-    }
-    /**
-     * Extract comments from text prefixing the token closest following `pos`.
-     * The return value is an array containing a TextRange for each comment.
-     * Single-line comment ranges include the beginning '//' characters but not the ending line break.
-     * Multi - line comment ranges include the beginning '/* and ending '<asterisk>/' characters.
-     * The return value is undefined if no comments were found.
-     * @param trailing
-     * If false, whitespace is skipped until the first line break and comments between that location
-     * and the next token are returned.
-     * If true, comments occurring between the given position and the next line break are returned.
-     */
-    function getCommentRanges(text, pos, trailing) {
-        var result;
-        var collecting = trailing || pos === 0;
-        while (pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                case 10 /* lineFeed */:
-                    pos++;
-                    if (trailing) {
-                        return result;
-                    }
-                    collecting = true;
-                    if (result && result.length) {
-                        ts.lastOrUndefined(result).hasTrailingNewLine = true;
-                    }
-                    continue;
-                case 9 /* tab */:
-                case 11 /* verticalTab */:
-                case 12 /* formFeed */:
-                case 32 /* space */:
-                    pos++;
-                    continue;
-                case 47 /* slash */:
-                    var nextChar = text.charCodeAt(pos + 1);
-                    var hasTrailingNewLine = false;
-                    if (nextChar === 47 /* slash */ || nextChar === 42 /* asterisk */) {
-                        var kind = nextChar === 47 /* slash */ ? 2 /* SingleLineCommentTrivia */ : 3 /* MultiLineCommentTrivia */;
-                        var startPos = pos;
-                        pos += 2;
-                        if (nextChar === 47 /* slash */) {
-                            while (pos < text.length) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    hasTrailingNewLine = true;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        else {
-                            while (pos < text.length) {
-                                if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
-                                    pos += 2;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        if (collecting) {
-                            if (!result) {
-                                result = [];
-                            }
-                            result.push({ pos: startPos, end: pos, hasTrailingNewLine: hasTrailingNewLine, kind: kind });
-                        }
-                        continue;
-                    }
-                    break;
-                default:
-                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpace(ch) || isLineBreak(ch))) {
-                        if (result && result.length && isLineBreak(ch)) {
-                            ts.lastOrUndefined(result).hasTrailingNewLine = true;
-                        }
-                        pos++;
-                        continue;
-                    }
-                    break;
-            }
-            return result;
-        }
-        return result;
-    }
-    function getLeadingCommentRanges(text, pos) {
-        return getCommentRanges(text, pos, /*trailing*/ false);
-    }
-    ts.getLeadingCommentRanges = getLeadingCommentRanges;
-    function getTrailingCommentRanges(text, pos) {
-        return getCommentRanges(text, pos, /*trailing*/ true);
-    }
-    ts.getTrailingCommentRanges = getTrailingCommentRanges;
-    /** Optionally, get the shebang */
-    function getShebang(text) {
-        return shebangTriviaRegex.test(text)
-            ? shebangTriviaRegex.exec(text)[0]
-            : undefined;
-    }
-    ts.getShebang = getShebang;
-    function isIdentifierStart(ch, languageVersion) {
-        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
-            ch === 36 /* $ */ || ch === 95 /* _ */ ||
-            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierStart(ch, languageVersion);
-    }
-    ts.isIdentifierStart = isIdentifierStart;
-    function isIdentifierPart(ch, languageVersion) {
-        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
-            ch >= 48 /* _0 */ && ch <= 57 /* _9 */ || ch === 36 /* $ */ || ch === 95 /* _ */ ||
-            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierPart(ch, languageVersion);
-    }
-    ts.isIdentifierPart = isIdentifierPart;
-    /* @internal */
-    function isIdentifier(name, languageVersion) {
-        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
-            return false;
-        }
-        for (var i = 1, n = name.length; i < n; i++) {
-            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.isIdentifier = isIdentifier;
-    // Creates a scanner over a (possibly unspecified) range of a piece of text.
-    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
-        if (languageVariant === void 0) { languageVariant = 0 /* Standard */; }
-        // Current position (end position of text of current token)
-        var pos;
-        // end of text
-        var end;
-        // Start position of whitespace before current token
-        var startPos;
-        // Start position of text of current token
-        var tokenPos;
-        var token;
-        var tokenValue;
-        var precedingLineBreak;
-        var hasExtendedUnicodeEscape;
-        var tokenIsUnterminated;
-        setText(text, start, length);
-        return {
-            getStartPos: function () { return startPos; },
-            getTextPos: function () { return pos; },
-            getToken: function () { return token; },
-            getTokenPos: function () { return tokenPos; },
-            getTokenText: function () { return text.substring(tokenPos, pos); },
-            getTokenValue: function () { return tokenValue; },
-            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
-            hasPrecedingLineBreak: function () { return precedingLineBreak; },
-            isIdentifier: function () { return token === 69 /* Identifier */ || token > 105 /* LastReservedWord */; },
-            isReservedWord: function () { return token >= 70 /* FirstReservedWord */ && token <= 105 /* LastReservedWord */; },
-            isUnterminated: function () { return tokenIsUnterminated; },
-            reScanGreaterToken: reScanGreaterToken,
-            reScanSlashToken: reScanSlashToken,
-            reScanTemplateToken: reScanTemplateToken,
-            scanJsxIdentifier: scanJsxIdentifier,
-            reScanJsxToken: reScanJsxToken,
-            scanJsxToken: scanJsxToken,
-            scanJSDocToken: scanJSDocToken,
-            scan: scan,
-            setText: setText,
-            setScriptTarget: setScriptTarget,
-            setLanguageVariant: setLanguageVariant,
-            setOnError: setOnError,
-            setTextPos: setTextPos,
-            tryScan: tryScan,
-            lookAhead: lookAhead,
-            scanRange: scanRange
-        };
-        function error(message, length) {
-            if (onError) {
-                onError(message, length || 0);
-            }
-        }
-        function scanNumber() {
-            var start = pos;
-            while (isDigit(text.charCodeAt(pos)))
-                pos++;
-            if (text.charCodeAt(pos) === 46 /* dot */) {
-                pos++;
-                while (isDigit(text.charCodeAt(pos)))
-                    pos++;
-            }
-            var end = pos;
-            if (text.charCodeAt(pos) === 69 /* E */ || text.charCodeAt(pos) === 101 /* e */) {
-                pos++;
-                if (text.charCodeAt(pos) === 43 /* plus */ || text.charCodeAt(pos) === 45 /* minus */)
-                    pos++;
-                if (isDigit(text.charCodeAt(pos))) {
-                    pos++;
-                    while (isDigit(text.charCodeAt(pos)))
-                        pos++;
-                    end = pos;
-                }
-                else {
-                    error(ts.Diagnostics.Digit_expected);
-                }
-            }
-            return "" + +(text.substring(start, end));
-        }
-        function scanOctalDigits() {
-            var start = pos;
-            while (isOctalDigit(text.charCodeAt(pos))) {
-                pos++;
-            }
-            return +(text.substring(start, pos));
-        }
-        /**
-         * Scans the given number of hexadecimal digits in the text,
-         * returning -1 if the given number is unavailable.
-         */
-        function scanExactNumberOfHexDigits(count) {
-            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ false);
-        }
-        /**
-         * Scans as many hexadecimal digits as are available in the text,
-         * returning -1 if the given number of digits was unavailable.
-         */
-        function scanMinimumNumberOfHexDigits(count) {
-            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ true);
-        }
-        function scanHexDigits(minCount, scanAsManyAsPossible) {
-            var digits = 0;
-            var value = 0;
-            while (digits < minCount || scanAsManyAsPossible) {
-                var ch = text.charCodeAt(pos);
-                if (ch >= 48 /* _0 */ && ch <= 57 /* _9 */) {
-                    value = value * 16 + ch - 48 /* _0 */;
-                }
-                else if (ch >= 65 /* A */ && ch <= 70 /* F */) {
-                    value = value * 16 + ch - 65 /* A */ + 10;
-                }
-                else if (ch >= 97 /* a */ && ch <= 102 /* f */) {
-                    value = value * 16 + ch - 97 /* a */ + 10;
-                }
-                else {
-                    break;
-                }
-                pos++;
-                digits++;
-            }
-            if (digits < minCount) {
-                value = -1;
-            }
-            return value;
-        }
-        function scanString() {
-            var quote = text.charCodeAt(pos);
-            pos++;
-            var result = "";
-            var start = pos;
-            while (true) {
-                if (pos >= end) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
-                }
-                var ch = text.charCodeAt(pos);
-                if (ch === quote) {
-                    result += text.substring(start, pos);
-                    pos++;
-                    break;
-                }
-                if (ch === 92 /* backslash */) {
-                    result += text.substring(start, pos);
-                    result += scanEscapeSequence();
-                    start = pos;
-                    continue;
-                }
-                if (isLineBreak(ch)) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
-                }
-                pos++;
-            }
-            return result;
-        }
-        /**
-         * Sets the current 'tokenValue' and returns a NoSubstitutionTemplateLiteral or
-         * a literal component of a TemplateExpression.
-         */
-        function scanTemplateAndSetTokenValue() {
-            var startedWithBacktick = text.charCodeAt(pos) === 96 /* backtick */;
-            pos++;
-            var start = pos;
-            var contents = "";
-            var resultingToken;
-            while (true) {
-                if (pos >= end) {
-                    contents += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_template_literal);
-                    resultingToken = startedWithBacktick ? 11 /* NoSubstitutionTemplateLiteral */ : 14 /* TemplateTail */;
-                    break;
-                }
-                var currChar = text.charCodeAt(pos);
-                // '`'
-                if (currChar === 96 /* backtick */) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    resultingToken = startedWithBacktick ? 11 /* NoSubstitutionTemplateLiteral */ : 14 /* TemplateTail */;
-                    break;
-                }
-                // '${'
-                if (currChar === 36 /* $ */ && pos + 1 < end && text.charCodeAt(pos + 1) === 123 /* openBrace */) {
-                    contents += text.substring(start, pos);
-                    pos += 2;
-                    resultingToken = startedWithBacktick ? 12 /* TemplateHead */ : 13 /* TemplateMiddle */;
-                    break;
-                }
-                // Escape character
-                if (currChar === 92 /* backslash */) {
-                    contents += text.substring(start, pos);
-                    contents += scanEscapeSequence();
-                    start = pos;
-                    continue;
-                }
-                // Speculated ECMAScript 6 Spec 11.8.6.1:
-                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for Template Values
-                if (currChar === 13 /* carriageReturn */) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                    contents += "\n";
-                    start = pos;
-                    continue;
-                }
-                pos++;
-            }
-            ts.Debug.assert(resultingToken !== undefined);
-            tokenValue = contents;
-            return resultingToken;
-        }
-        function scanEscapeSequence() {
-            pos++;
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                return "";
-            }
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 48 /* _0 */:
-                    return "\0";
-                case 98 /* b */:
-                    return "\b";
-                case 116 /* t */:
-                    return "\t";
-                case 110 /* n */:
-                    return "\n";
-                case 118 /* v */:
-                    return "\v";
-                case 102 /* f */:
-                    return "\f";
-                case 114 /* r */:
-                    return "\r";
-                case 39 /* singleQuote */:
-                    return "\'";
-                case 34 /* doubleQuote */:
-                    return "\"";
-                case 117 /* u */:
-                    // '\u{DDDDDDDD}'
-                    if (pos < end && text.charCodeAt(pos) === 123 /* openBrace */) {
-                        hasExtendedUnicodeEscape = true;
-                        pos++;
-                        return scanExtendedUnicodeEscape();
-                    }
-                    // '\uDDDD'
-                    return scanHexadecimalEscape(/*numDigits*/ 4);
-                case 120 /* x */:
-                    // '\xDD'
-                    return scanHexadecimalEscape(/*numDigits*/ 2);
-                // when encountering a LineContinuation (i.e. a backslash and a line terminator sequence),
-                // the line terminator is interpreted to be "the empty code unit sequence".
-                case 13 /* carriageReturn */:
-                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                // fall through
-                case 10 /* lineFeed */:
-                case 8232 /* lineSeparator */:
-                case 8233 /* paragraphSeparator */:
-                    return "";
-                default:
-                    return String.fromCharCode(ch);
-            }
-        }
-        function scanHexadecimalEscape(numDigits) {
-            var escapedValue = scanExactNumberOfHexDigits(numDigits);
-            if (escapedValue >= 0) {
-                return String.fromCharCode(escapedValue);
-            }
-            else {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                return "";
-            }
-        }
-        function scanExtendedUnicodeEscape() {
-            var escapedValue = scanMinimumNumberOfHexDigits(1);
-            var isInvalidExtendedEscape = false;
-            // Validate the value of the digit
-            if (escapedValue < 0) {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                isInvalidExtendedEscape = true;
-            }
-            else if (escapedValue > 0x10FFFF) {
-                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
-                isInvalidExtendedEscape = true;
-            }
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                isInvalidExtendedEscape = true;
-            }
-            else if (text.charCodeAt(pos) === 125 /* closeBrace */) {
-                // Only swallow the following character up if it's a '}'.
-                pos++;
-            }
-            else {
-                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
-                isInvalidExtendedEscape = true;
-            }
-            if (isInvalidExtendedEscape) {
-                return "";
-            }
-            return utf16EncodeAsString(escapedValue);
-        }
-        // Derived from the 10.1.1 UTF16Encoding of the ES6 Spec.
-        function utf16EncodeAsString(codePoint) {
-            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
-            if (codePoint <= 65535) {
-                return String.fromCharCode(codePoint);
-            }
-            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
-            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
-            return String.fromCharCode(codeUnit1, codeUnit2);
-        }
-        // Current character is known to be a backslash. Check for Unicode escape of the form '\uXXXX'
-        // and return code point value if valid Unicode escape is found. Otherwise return -1.
-        function peekUnicodeEscape() {
-            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117 /* u */) {
-                var start_1 = pos;
-                pos += 2;
-                var value = scanExactNumberOfHexDigits(4);
-                pos = start_1;
-                return value;
-            }
-            return -1;
-        }
-        function scanIdentifierParts() {
-            var result = "";
-            var start = pos;
-            while (pos < end) {
-                var ch = text.charCodeAt(pos);
-                if (isIdentifierPart(ch, languageVersion)) {
-                    pos++;
-                }
-                else if (ch === 92 /* backslash */) {
-                    ch = peekUnicodeEscape();
-                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
-                        break;
-                    }
-                    result += text.substring(start, pos);
-                    result += String.fromCharCode(ch);
-                    // Valid Unicode escape is always six characters
-                    pos += 6;
-                    start = pos;
-                }
-                else {
-                    break;
-                }
-            }
-            result += text.substring(start, pos);
-            return result;
-        }
-        function getIdentifierToken() {
-            // Reserved words are between 2 and 11 characters long and start with a lowercase letter
-            var len = tokenValue.length;
-            if (len >= 2 && len <= 11) {
-                var ch = tokenValue.charCodeAt(0);
-                if (ch >= 97 /* a */ && ch <= 122 /* z */ && hasOwnProperty.call(textToToken, tokenValue)) {
-                    return token = textToToken[tokenValue];
-                }
-            }
-            return token = 69 /* Identifier */;
-        }
-        function scanBinaryOrOctalDigits(base) {
-            ts.Debug.assert(base !== 2 || base !== 8, "Expected either base 2 or base 8");
-            var value = 0;
-            // For counting number of digits; Valid binaryIntegerLiteral must have at least one binary digit following B or b.
-            // Similarly valid octalIntegerLiteral must have at least one octal digit following o or O.
-            var numberOfDigits = 0;
-            while (true) {
-                var ch = text.charCodeAt(pos);
-                var valueOfCh = ch - 48 /* _0 */;
-                if (!isDigit(ch) || valueOfCh >= base) {
-                    break;
-                }
-                value = value * base + valueOfCh;
-                pos++;
-                numberOfDigits++;
-            }
-            // Invalid binaryIntegerLiteral or octalIntegerLiteral
-            if (numberOfDigits === 0) {
-                return -1;
-            }
-            return value;
-        }
-        function scan() {
-            startPos = pos;
-            hasExtendedUnicodeEscape = false;
-            precedingLineBreak = false;
-            tokenIsUnterminated = false;
-            while (true) {
-                tokenPos = pos;
-                if (pos >= end) {
-                    return token = 1 /* EndOfFileToken */;
-                }
-                var ch = text.charCodeAt(pos);
-                // Special handling for shebang
-                if (ch === 35 /* hash */ && pos === 0 && isShebangTrivia(text, pos)) {
-                    pos = scanShebangTrivia(text, pos);
-                    if (skipTrivia) {
-                        continue;
-                    }
-                    else {
-                        return token = 6 /* ShebangTrivia */;
-                    }
-                }
-                switch (ch) {
-                    case 10 /* lineFeed */:
-                    case 13 /* carriageReturn */:
-                        precedingLineBreak = true;
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            if (ch === 13 /* carriageReturn */ && pos + 1 < end && text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
-                                // consume both CR and LF
-                                pos += 2;
-                            }
-                            else {
-                                pos++;
-                            }
-                            return token = 4 /* NewLineTrivia */;
-                        }
-                    case 9 /* tab */:
-                    case 11 /* verticalTab */:
-                    case 12 /* formFeed */:
-                    case 32 /* space */:
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            while (pos < end && isWhiteSpace(text.charCodeAt(pos))) {
-                                pos++;
-                            }
-                            return token = 5 /* WhitespaceTrivia */;
-                        }
-                    case 33 /* exclamation */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 33 /* ExclamationEqualsEqualsToken */;
-                            }
-                            return pos += 2, token = 31 /* ExclamationEqualsToken */;
-                        }
-                        pos++;
-                        return token = 49 /* ExclamationToken */;
-                    case 34 /* doubleQuote */:
-                    case 39 /* singleQuote */:
-                        tokenValue = scanString();
-                        return token = 9 /* StringLiteral */;
-                    case 96 /* backtick */:
-                        return token = scanTemplateAndSetTokenValue();
-                    case 37 /* percent */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 62 /* PercentEqualsToken */;
-                        }
-                        pos++;
-                        return token = 40 /* PercentToken */;
-                    case 38 /* ampersand */:
-                        if (text.charCodeAt(pos + 1) === 38 /* ampersand */) {
-                            return pos += 2, token = 51 /* AmpersandAmpersandToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 66 /* AmpersandEqualsToken */;
-                        }
-                        pos++;
-                        return token = 46 /* AmpersandToken */;
-                    case 40 /* openParen */:
-                        pos++;
-                        return token = 17 /* OpenParenToken */;
-                    case 41 /* closeParen */:
-                        pos++;
-                        return token = 18 /* CloseParenToken */;
-                    case 42 /* asterisk */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 59 /* AsteriskEqualsToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 60 /* AsteriskAsteriskEqualsToken */;
-                            }
-                            return pos += 2, token = 38 /* AsteriskAsteriskToken */;
-                        }
-                        pos++;
-                        return token = 37 /* AsteriskToken */;
-                    case 43 /* plus */:
-                        if (text.charCodeAt(pos + 1) === 43 /* plus */) {
-                            return pos += 2, token = 41 /* PlusPlusToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 57 /* PlusEqualsToken */;
-                        }
-                        pos++;
-                        return token = 35 /* PlusToken */;
-                    case 44 /* comma */:
-                        pos++;
-                        return token = 24 /* CommaToken */;
-                    case 45 /* minus */:
-                        if (text.charCodeAt(pos + 1) === 45 /* minus */) {
-                            return pos += 2, token = 42 /* MinusMinusToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 58 /* MinusEqualsToken */;
-                        }
-                        pos++;
-                        return token = 36 /* MinusToken */;
-                    case 46 /* dot */:
-                        if (isDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = scanNumber();
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 46 /* dot */ && text.charCodeAt(pos + 2) === 46 /* dot */) {
-                            return pos += 3, token = 22 /* DotDotDotToken */;
-                        }
-                        pos++;
-                        return token = 21 /* DotToken */;
-                    case 47 /* slash */:
-                        // Single-line comment
-                        if (text.charCodeAt(pos + 1) === 47 /* slash */) {
-                            pos += 2;
-                            while (pos < end) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    break;
-                                }
-                                pos++;
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 2 /* SingleLineCommentTrivia */;
-                            }
-                        }
-                        // Multi-line comment
-                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
-                            pos += 2;
-                            var commentClosed = false;
-                            while (pos < end) {
-                                var ch_2 = text.charCodeAt(pos);
-                                if (ch_2 === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
-                                    pos += 2;
-                                    commentClosed = true;
-                                    break;
-                                }
-                                if (isLineBreak(ch_2)) {
-                                    precedingLineBreak = true;
-                                }
-                                pos++;
-                            }
-                            if (!commentClosed) {
-                                error(ts.Diagnostics.Asterisk_Slash_expected);
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                tokenIsUnterminated = !commentClosed;
-                                return token = 3 /* MultiLineCommentTrivia */;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 61 /* SlashEqualsToken */;
-                        }
-                        pos++;
-                        return token = 39 /* SlashToken */;
-                    case 48 /* _0 */:
-                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 /* X */ || text.charCodeAt(pos + 1) === 120 /* x */)) {
-                            pos += 2;
-                            var value = scanMinimumNumberOfHexDigits(1);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 /* B */ || text.charCodeAt(pos + 1) === 98 /* b */)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(/* base */ 2);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Binary_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 /* O */ || text.charCodeAt(pos + 1) === 111 /* o */)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(/* base */ 8);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Octal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        // Try to parse as an octal
-                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = "" + scanOctalDigits();
-                            return token = 8 /* NumericLiteral */;
-                        }
-                    // This fall-through is a deviation from the EcmaScript grammar. The grammar says that a leading zero
-                    // can only be followed by an octal digit, a dot, or the end of the number literal. However, we are being
-                    // permissive and allowing decimal digits of the form 08* and 09* (which many browsers also do).
-                    case 49 /* _1 */:
-                    case 50 /* _2 */:
-                    case 51 /* _3 */:
-                    case 52 /* _4 */:
-                    case 53 /* _5 */:
-                    case 54 /* _6 */:
-                    case 55 /* _7 */:
-                    case 56 /* _8 */:
-                    case 57 /* _9 */:
-                        tokenValue = scanNumber();
-                        return token = 8 /* NumericLiteral */;
-                    case 58 /* colon */:
-                        pos++;
-                        return token = 54 /* ColonToken */;
-                    case 59 /* semicolon */:
-                        pos++;
-                        return token = 23 /* SemicolonToken */;
-                    case 60 /* lessThan */:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7 /* ConflictMarkerTrivia */;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 60 /* lessThan */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 63 /* LessThanLessThanEqualsToken */;
-                            }
-                            return pos += 2, token = 43 /* LessThanLessThanToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 28 /* LessThanEqualsToken */;
-                        }
-                        if (languageVariant === 1 /* JSX */ &&
-                            text.charCodeAt(pos + 1) === 47 /* slash */ &&
-                            text.charCodeAt(pos + 2) !== 42 /* asterisk */) {
-                            return pos += 2, token = 26 /* LessThanSlashToken */;
-                        }
-                        pos++;
-                        return token = 25 /* LessThanToken */;
-                    case 61 /* equals */:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7 /* ConflictMarkerTrivia */;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 32 /* EqualsEqualsEqualsToken */;
-                            }
-                            return pos += 2, token = 30 /* EqualsEqualsToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
-                            return pos += 2, token = 34 /* EqualsGreaterThanToken */;
-                        }
-                        pos++;
-                        return token = 56 /* EqualsToken */;
-                    case 62 /* greaterThan */:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7 /* ConflictMarkerTrivia */;
-                            }
-                        }
-                        pos++;
-                        return token = 27 /* GreaterThanToken */;
-                    case 63 /* question */:
-                        pos++;
-                        return token = 53 /* QuestionToken */;
-                    case 91 /* openBracket */:
-                        pos++;
-                        return token = 19 /* OpenBracketToken */;
-                    case 93 /* closeBracket */:
-                        pos++;
-                        return token = 20 /* CloseBracketToken */;
-                    case 94 /* caret */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 68 /* CaretEqualsToken */;
-                        }
-                        pos++;
-                        return token = 48 /* CaretToken */;
-                    case 123 /* openBrace */:
-                        pos++;
-                        return token = 15 /* OpenBraceToken */;
-                    case 124 /* bar */:
-                        if (text.charCodeAt(pos + 1) === 124 /* bar */) {
-                            return pos += 2, token = 52 /* BarBarToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 67 /* BarEqualsToken */;
-                        }
-                        pos++;
-                        return token = 47 /* BarToken */;
-                    case 125 /* closeBrace */:
-                        pos++;
-                        return token = 16 /* CloseBraceToken */;
-                    case 126 /* tilde */:
-                        pos++;
-                        return token = 50 /* TildeToken */;
-                    case 64 /* at */:
-                        pos++;
-                        return token = 55 /* AtToken */;
-                    case 92 /* backslash */:
-                        var cookedChar = peekUnicodeEscape();
-                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
-                            pos += 6;
-                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
-                            return token = getIdentifierToken();
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0 /* Unknown */;
-                    default:
-                        if (isIdentifierStart(ch, languageVersion)) {
-                            pos++;
-                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
-                                pos++;
-                            tokenValue = text.substring(tokenPos, pos);
-                            if (ch === 92 /* backslash */) {
-                                tokenValue += scanIdentifierParts();
-                            }
-                            return token = getIdentifierToken();
-                        }
-                        else if (isWhiteSpace(ch)) {
-                            pos++;
-                            continue;
-                        }
-                        else if (isLineBreak(ch)) {
-                            precedingLineBreak = true;
-                            pos++;
-                            continue;
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0 /* Unknown */;
-                }
-            }
-        }
-        function reScanGreaterToken() {
-            if (token === 27 /* GreaterThanToken */) {
-                if (text.charCodeAt(pos) === 62 /* greaterThan */) {
-                    if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
-                        if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                            return pos += 3, token = 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */;
-                        }
-                        return pos += 2, token = 45 /* GreaterThanGreaterThanGreaterThanToken */;
-                    }
-                    if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                        return pos += 2, token = 64 /* GreaterThanGreaterThanEqualsToken */;
-                    }
-                    pos++;
-                    return token = 44 /* GreaterThanGreaterThanToken */;
-                }
-                if (text.charCodeAt(pos) === 61 /* equals */) {
-                    pos++;
-                    return token = 29 /* GreaterThanEqualsToken */;
-                }
-            }
-            return token;
-        }
-        function reScanSlashToken() {
-            if (token === 39 /* SlashToken */ || token === 61 /* SlashEqualsToken */) {
-                var p = tokenPos + 1;
-                var inEscape = false;
-                var inCharacterClass = false;
-                while (true) {
-                    // If we reach the end of a file, or hit a newline, then this is an unterminated
-                    // regex.  Report error and return what we have so far.
-                    if (p >= end) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    var ch = text.charCodeAt(p);
-                    if (isLineBreak(ch)) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    if (inEscape) {
-                        // Parsing an escape character;
-                        // reset the flag and just advance to the next char.
-                        inEscape = false;
-                    }
-                    else if (ch === 47 /* slash */ && !inCharacterClass) {
-                        // A slash within a character class is permissible,
-                        // but in general it signals the end of the regexp literal.
-                        p++;
-                        break;
-                    }
-                    else if (ch === 91 /* openBracket */) {
-                        inCharacterClass = true;
-                    }
-                    else if (ch === 92 /* backslash */) {
-                        inEscape = true;
-                    }
-                    else if (ch === 93 /* closeBracket */) {
-                        inCharacterClass = false;
-                    }
-                    p++;
-                }
-                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
-                    p++;
-                }
-                pos = p;
-                tokenValue = text.substring(tokenPos, pos);
-                token = 10 /* RegularExpressionLiteral */;
-            }
-            return token;
-        }
-        /**
-         * Unconditionally back up and scan a template expression portion.
-         */
-        function reScanTemplateToken() {
-            ts.Debug.assert(token === 16 /* CloseBraceToken */, "'reScanTemplateToken' should only be called on a '}'");
-            pos = tokenPos;
-            return token = scanTemplateAndSetTokenValue();
-        }
-        function reScanJsxToken() {
-            pos = tokenPos = startPos;
-            return token = scanJsxToken();
-        }
-        function scanJsxToken() {
-            startPos = tokenPos = pos;
-            if (pos >= end) {
-                return token = 1 /* EndOfFileToken */;
-            }
-            var char = text.charCodeAt(pos);
-            if (char === 60 /* lessThan */) {
-                if (text.charCodeAt(pos + 1) === 47 /* slash */) {
-                    pos += 2;
-                    return token = 26 /* LessThanSlashToken */;
-                }
-                pos++;
-                return token = 25 /* LessThanToken */;
-            }
-            if (char === 123 /* openBrace */) {
-                pos++;
-                return token = 15 /* OpenBraceToken */;
-            }
-            while (pos < end) {
-                pos++;
-                char = text.charCodeAt(pos);
-                if ((char === 123 /* openBrace */) || (char === 60 /* lessThan */)) {
-                    break;
-                }
-            }
-            return token = 244 /* JsxText */;
-        }
-        // Scans a JSX identifier; these differ from normal identifiers in that
-        // they allow dashes
-        function scanJsxIdentifier() {
-            if (tokenIsIdentifierOrKeyword(token)) {
-                var firstCharPosition = pos;
-                while (pos < end) {
-                    var ch = text.charCodeAt(pos);
-                    if (ch === 45 /* minus */ || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
-                        pos++;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
-            }
-            return token;
-        }
-        function scanJSDocToken() {
-            if (pos >= end) {
-                return token = 1 /* EndOfFileToken */;
-            }
-            startPos = pos;
-            // Eat leading whitespace
-            var ch = text.charCodeAt(pos);
-            while (pos < end) {
-                ch = text.charCodeAt(pos);
-                if (isWhiteSpace(ch)) {
-                    pos++;
-                }
-                else {
-                    break;
-                }
-            }
-            tokenPos = pos;
-            switch (ch) {
-                case 64 /* at */:
-                    return pos += 1, token = 55 /* AtToken */;
-                case 10 /* lineFeed */:
-                case 13 /* carriageReturn */:
-                    return pos += 1, token = 4 /* NewLineTrivia */;
-                case 42 /* asterisk */:
-                    return pos += 1, token = 37 /* AsteriskToken */;
-                case 123 /* openBrace */:
-                    return pos += 1, token = 15 /* OpenBraceToken */;
-                case 125 /* closeBrace */:
-                    return pos += 1, token = 16 /* CloseBraceToken */;
-                case 91 /* openBracket */:
-                    return pos += 1, token = 19 /* OpenBracketToken */;
-                case 93 /* closeBracket */:
-                    return pos += 1, token = 20 /* CloseBracketToken */;
-                case 61 /* equals */:
-                    return pos += 1, token = 56 /* EqualsToken */;
-                case 44 /* comma */:
-                    return pos += 1, token = 24 /* CommaToken */;
-            }
-            if (isIdentifierStart(ch, 2 /* Latest */)) {
-                pos++;
-                while (isIdentifierPart(text.charCodeAt(pos), 2 /* Latest */) && pos < end) {
-                    pos++;
-                }
-                return token = 69 /* Identifier */;
-            }
-            else {
-                return pos += 1, token = 0 /* Unknown */;
-            }
-        }
-        function speculationHelper(callback, isLookahead) {
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var saveTokenValue = tokenValue;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var result = callback();
-            // If our callback returned something 'falsy' or we're just looking ahead,
-            // then unconditionally restore us to where we were.
-            if (!result || isLookahead) {
-                pos = savePos;
-                startPos = saveStartPos;
-                tokenPos = saveTokenPos;
-                token = saveToken;
-                tokenValue = saveTokenValue;
-                precedingLineBreak = savePrecedingLineBreak;
-            }
-            return result;
-        }
-        function scanRange(start, length, callback) {
-            var saveEnd = end;
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var saveTokenValue = tokenValue;
-            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
-            var saveTokenIsUnterminated = tokenIsUnterminated;
-            setText(text, start, length);
-            var result = callback();
-            end = saveEnd;
-            pos = savePos;
-            startPos = saveStartPos;
-            tokenPos = saveTokenPos;
-            token = saveToken;
-            precedingLineBreak = savePrecedingLineBreak;
-            tokenValue = saveTokenValue;
-            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
-            tokenIsUnterminated = saveTokenIsUnterminated;
-            return result;
-        }
-        function lookAhead(callback) {
-            return speculationHelper(callback, /*isLookahead*/ true);
-        }
-        function tryScan(callback) {
-            return speculationHelper(callback, /*isLookahead*/ false);
-        }
-        function setText(newText, start, length) {
-            text = newText || "";
-            end = length === undefined ? text.length : start + length;
-            setTextPos(start || 0);
-        }
-        function setOnError(errorCallback) {
-            onError = errorCallback;
-        }
-        function setScriptTarget(scriptTarget) {
-            languageVersion = scriptTarget;
-        }
-        function setLanguageVariant(variant) {
-            languageVariant = variant;
-        }
-        function setTextPos(textPos) {
-            ts.Debug.assert(textPos >= 0);
-            pos = textPos;
-            startPos = textPos;
-            tokenPos = textPos;
-            token = 0 /* Unknown */;
-            precedingLineBreak = false;
-            tokenValue = undefined;
-            hasExtendedUnicodeEscape = false;
-            tokenIsUnterminated = false;
-        }
-    }
-    ts.createScanner = createScanner;
-})(ts || (ts = {}));
-/// <reference path="sys.ts" />
-/* @internal */
-var ts;
-(function (ts) {
-    function getDeclarationOfKind(symbol, kind) {
-        var declarations = symbol.declarations;
-        if (declarations) {
-            for (var _i = 0, declarations_1 = declarations; _i < declarations_1.length; _i++) {
-                var declaration = declarations_1[_i];
-                if (declaration.kind === kind) {
-                    return declaration;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getDeclarationOfKind = getDeclarationOfKind;
-    // Pool writers to avoid needing to allocate them for every symbol we write.
-    var stringWriters = [];
-    function getSingleLineStringWriter() {
-        if (stringWriters.length === 0) {
-            var str_1 = "";
-            var writeText = function (text) { return str_1 += text; };
-            return {
-                string: function () { return str_1; },
-                writeKeyword: writeText,
-                writeOperator: writeText,
-                writePunctuation: writeText,
-                writeSpace: writeText,
-                writeStringLiteral: writeText,
-                writeParameter: writeText,
-                writeSymbol: writeText,
-                // Completely ignore indentation for string writers.  And map newlines to
-                // a single space.
-                writeLine: function () { return str_1 += " "; },
-                increaseIndent: function () { },
-                decreaseIndent: function () { },
-                clear: function () { return str_1 = ""; },
-                trackSymbol: function () { },
-                reportInaccessibleThisError: function () { }
-            };
-        }
-        return stringWriters.pop();
-    }
-    ts.getSingleLineStringWriter = getSingleLineStringWriter;
-    function releaseStringWriter(writer) {
-        writer.clear();
-        stringWriters.push(writer);
-    }
-    ts.releaseStringWriter = releaseStringWriter;
-    function getFullWidth(node) {
-        return node.end - node.pos;
-    }
-    ts.getFullWidth = getFullWidth;
-    function mapIsEqualTo(map1, map2) {
-        if (!map1 || !map2) {
-            return map1 === map2;
-        }
-        return containsAll(map1, map2) && containsAll(map2, map1);
-    }
-    ts.mapIsEqualTo = mapIsEqualTo;
-    function containsAll(map, other) {
-        for (var key in map) {
-            if (!ts.hasProperty(map, key)) {
-                continue;
-            }
-            if (!ts.hasProperty(other, key) || map[key] !== other[key]) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function arrayIsEqualTo(array1, array2, equaler) {
-        if (!array1 || !array2) {
-            return array1 === array2;
-        }
-        if (array1.length !== array2.length) {
-            return false;
-        }
-        for (var i = 0; i < array1.length; i++) {
-            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
-            if (!equals) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.arrayIsEqualTo = arrayIsEqualTo;
-    function hasResolvedModule(sourceFile, moduleNameText) {
-        return sourceFile.resolvedModules && ts.hasProperty(sourceFile.resolvedModules, moduleNameText);
-    }
-    ts.hasResolvedModule = hasResolvedModule;
-    function getResolvedModule(sourceFile, moduleNameText) {
-        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
-    }
-    ts.getResolvedModule = getResolvedModule;
-    function setResolvedModule(sourceFile, moduleNameText, resolvedModule) {
-        if (!sourceFile.resolvedModules) {
-            sourceFile.resolvedModules = {};
-        }
-        sourceFile.resolvedModules[moduleNameText] = resolvedModule;
-    }
-    ts.setResolvedModule = setResolvedModule;
-    function setResolvedTypeReferenceDirective(sourceFile, typeReferenceDirectiveName, resolvedTypeReferenceDirective) {
-        if (!sourceFile.resolvedTypeReferenceDirectiveNames) {
-            sourceFile.resolvedTypeReferenceDirectiveNames = {};
-        }
-        sourceFile.resolvedTypeReferenceDirectiveNames[typeReferenceDirectiveName] = resolvedTypeReferenceDirective;
-    }
-    ts.setResolvedTypeReferenceDirective = setResolvedTypeReferenceDirective;
-    /* @internal */
-    function moduleResolutionIsEqualTo(oldResolution, newResolution) {
-        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport;
-    }
-    ts.moduleResolutionIsEqualTo = moduleResolutionIsEqualTo;
-    /* @internal */
-    function typeDirectiveIsEqualTo(oldResolution, newResolution) {
-        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.primary === newResolution.primary;
-    }
-    ts.typeDirectiveIsEqualTo = typeDirectiveIsEqualTo;
-    /* @internal */
-    function hasChangesInResolutions(names, newResolutions, oldResolutions, comparer) {
-        if (names.length !== newResolutions.length) {
-            return false;
-        }
-        for (var i = 0; i < names.length; i++) {
-            var newResolution = newResolutions[i];
-            var oldResolution = oldResolutions && ts.hasProperty(oldResolutions, names[i]) ? oldResolutions[names[i]] : undefined;
-            var changed = oldResolution
-                ? !newResolution || !comparer(oldResolution, newResolution)
-                : newResolution;
-            if (changed) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.hasChangesInResolutions = hasChangesInResolutions;
-    // Returns true if this node contains a parse error anywhere underneath it.
-    function containsParseError(node) {
-        aggregateChildData(node);
-        return (node.flags & 268435456 /* ThisNodeOrAnySubNodesHasError */) !== 0;
-    }
-    ts.containsParseError = containsParseError;
-    function aggregateChildData(node) {
-        if (!(node.flags & 536870912 /* HasAggregatedChildData */)) {
-            // A node is considered to contain a parse error if:
-            //  a) the parser explicitly marked that it had an error
-            //  b) any of it's children reported that it had an error.
-            var thisNodeOrAnySubNodesHasError = ((node.flags & 67108864 /* ThisNodeHasError */) !== 0) ||
-                ts.forEachChild(node, containsParseError);
-            // If so, mark ourselves accordingly.
-            if (thisNodeOrAnySubNodesHasError) {
-                node.flags |= 268435456 /* ThisNodeOrAnySubNodesHasError */;
-            }
-            // Also mark that we've propagated the child information to this node.  This way we can
-            // always consult the bit directly on this node without needing to check its children
-            // again.
-            node.flags |= 536870912 /* HasAggregatedChildData */;
-        }
-    }
-    function getSourceFileOfNode(node) {
-        while (node && node.kind !== 256 /* SourceFile */) {
-            node = node.parent;
-        }
-        return node;
-    }
-    ts.getSourceFileOfNode = getSourceFileOfNode;
-    function isStatementWithLocals(node) {
-        switch (node.kind) {
-            case 199 /* Block */:
-            case 227 /* CaseBlock */:
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-                return true;
-        }
-        return false;
-    }
-    ts.isStatementWithLocals = isStatementWithLocals;
-    function getStartPositionOfLine(line, sourceFile) {
-        ts.Debug.assert(line >= 0);
-        return ts.getLineStarts(sourceFile)[line];
-    }
-    ts.getStartPositionOfLine = getStartPositionOfLine;
-    // This is a useful function for debugging purposes.
-    function nodePosToString(node) {
-        var file = getSourceFileOfNode(node);
-        var loc = ts.getLineAndCharacterOfPosition(file, node.pos);
-        return file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + ")";
-    }
-    ts.nodePosToString = nodePosToString;
-    function getStartPosOfNode(node) {
-        return node.pos;
-    }
-    ts.getStartPosOfNode = getStartPosOfNode;
-    function getEndLinePosition(line, sourceFile) {
-        ts.Debug.assert(line >= 0);
-        var lineStarts = ts.getLineStarts(sourceFile);
-        var lineIndex = line;
-        var sourceText = sourceFile.text;
-        if (lineIndex + 1 === lineStarts.length) {
-            // last line - return EOF
-            return sourceText.length - 1;
-        }
-        else {
-            // current line start
-            var start = lineStarts[lineIndex];
-            // take the start position of the next line - 1 = it should be some line break
-            var pos = lineStarts[lineIndex + 1] - 1;
-            ts.Debug.assert(ts.isLineBreak(sourceText.charCodeAt(pos)));
-            // walk backwards skipping line breaks, stop the the beginning of current line.
-            // i.e:
-            // <some text>
-            // $ <- end of line for this position should match the start position
-            while (start <= pos && ts.isLineBreak(sourceText.charCodeAt(pos))) {
-                pos--;
-            }
-            return pos;
-        }
-    }
-    ts.getEndLinePosition = getEndLinePosition;
-    // Returns true if this node is missing from the actual source code. A 'missing' node is different
-    // from 'undefined/defined'. When a node is undefined (which can happen for optional nodes
-    // in the tree), it is definitely missing. However, a node may be defined, but still be
-    // missing.  This happens whenever the parser knows it needs to parse something, but can't
-    // get anything in the source code that it expects at that location. For example:
-    //
-    //          let a: ;
-    //
-    // Here, the Type in the Type-Annotation is not-optional (as there is a colon in the source
-    // code). So the parser will attempt to parse out a type, and will create an actual node.
-    // However, this node will be 'missing' in the sense that no actual source-code/tokens are
-    // contained within it.
-    function nodeIsMissing(node) {
-        if (!node) {
-            return true;
-        }
-        return node.pos === node.end && node.pos >= 0 && node.kind !== 1 /* EndOfFileToken */;
-    }
-    ts.nodeIsMissing = nodeIsMissing;
-    function nodeIsPresent(node) {
-        return !nodeIsMissing(node);
-    }
-    ts.nodeIsPresent = nodeIsPresent;
-    function getTokenPosOfNode(node, sourceFile) {
-        // With nodes that have no width (i.e. 'Missing' nodes), we actually *don't*
-        // want to skip trivia because this will launch us forward to the next token.
-        if (nodeIsMissing(node)) {
-            return node.pos;
-        }
-        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
-    }
-    ts.getTokenPosOfNode = getTokenPosOfNode;
-    function getNonDecoratorTokenPosOfNode(node, sourceFile) {
-        if (nodeIsMissing(node) || !node.decorators) {
-            return getTokenPosOfNode(node, sourceFile);
-        }
-        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.decorators.end);
-    }
-    ts.getNonDecoratorTokenPosOfNode = getNonDecoratorTokenPosOfNode;
-    function getSourceTextOfNodeFromSourceFile(sourceFile, node, includeTrivia) {
-        if (includeTrivia === void 0) { includeTrivia = false; }
-        if (nodeIsMissing(node)) {
-            return "";
-        }
-        var text = sourceFile.text;
-        return text.substring(includeTrivia ? node.pos : ts.skipTrivia(text, node.pos), node.end);
-    }
-    ts.getSourceTextOfNodeFromSourceFile = getSourceTextOfNodeFromSourceFile;
-    function getTextOfNodeFromSourceText(sourceText, node) {
-        if (nodeIsMissing(node)) {
-            return "";
-        }
-        return sourceText.substring(ts.skipTrivia(sourceText, node.pos), node.end);
-    }
-    ts.getTextOfNodeFromSourceText = getTextOfNodeFromSourceText;
-    function getTextOfNode(node, includeTrivia) {
-        if (includeTrivia === void 0) { includeTrivia = false; }
-        return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
-    }
-    ts.getTextOfNode = getTextOfNode;
-    // Add an extra underscore to identifiers that start with two underscores to avoid issues with magic names like '__proto__'
-    function escapeIdentifier(identifier) {
-        return identifier.length >= 2 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ ? "_" + identifier : identifier;
-    }
-    ts.escapeIdentifier = escapeIdentifier;
-    // Remove extra underscore from escaped identifier
-    function unescapeIdentifier(identifier) {
-        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ && identifier.charCodeAt(2) === 95 /* _ */ ? identifier.substr(1) : identifier;
-    }
-    ts.unescapeIdentifier = unescapeIdentifier;
-    // Make an identifier from an external module name by extracting the string after the last "/" and replacing
-    // all non-alphanumeric characters with underscores
-    function makeIdentifierFromModuleName(moduleName) {
-        return ts.getBaseFileName(moduleName).replace(/^(\d)/, "_$1").replace(/\W/g, "_");
-    }
-    ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
-    function isBlockOrCatchScoped(declaration) {
-        return (getCombinedNodeFlags(declaration) & 3072 /* BlockScoped */) !== 0 ||
-            isCatchClauseVariableDeclaration(declaration);
-    }
-    ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
-    function isAmbientModule(node) {
-        return node && node.kind === 225 /* ModuleDeclaration */ &&
-            (node.name.kind === 9 /* StringLiteral */ || isGlobalScopeAugmentation(node));
-    }
-    ts.isAmbientModule = isAmbientModule;
-    function isBlockScopedContainerTopLevel(node) {
-        return node.kind === 256 /* SourceFile */ ||
-            node.kind === 225 /* ModuleDeclaration */ ||
-            isFunctionLike(node) ||
-            isFunctionBlock(node);
-    }
-    ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
-    function isGlobalScopeAugmentation(module) {
-        return !!(module.flags & 131072 /* GlobalAugmentation */);
-    }
-    ts.isGlobalScopeAugmentation = isGlobalScopeAugmentation;
-    function isExternalModuleAugmentation(node) {
-        // external module augmentation is a ambient module declaration that is either:
-        // - defined in the top level scope and source file is an external module
-        // - defined inside ambient module declaration located in the top level scope and source file not an external module
-        if (!node || !isAmbientModule(node)) {
-            return false;
-        }
-        switch (node.parent.kind) {
-            case 256 /* SourceFile */:
-                return ts.isExternalModule(node.parent);
-            case 226 /* ModuleBlock */:
-                return isAmbientModule(node.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
-        }
-        return false;
-    }
-    ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
-    // Gets the nearest enclosing block scope container that has the provided node
-    // as a descendant, that is not the provided node.
-    function getEnclosingBlockScopeContainer(node) {
-        var current = node.parent;
-        while (current) {
-            if (isFunctionLike(current)) {
-                return current;
-            }
-            switch (current.kind) {
-                case 256 /* SourceFile */:
-                case 227 /* CaseBlock */:
-                case 252 /* CatchClause */:
-                case 225 /* ModuleDeclaration */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                    return current;
-                case 199 /* Block */:
-                    // function block is not considered block-scope container
-                    // see comment in binder.ts: bind(...), case for SyntaxKind.Block
-                    if (!isFunctionLike(current.parent)) {
-                        return current;
-                    }
-            }
-            current = current.parent;
-        }
-    }
-    ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
-    function isCatchClauseVariableDeclaration(declaration) {
-        return declaration &&
-            declaration.kind === 218 /* VariableDeclaration */ &&
-            declaration.parent &&
-            declaration.parent.kind === 252 /* CatchClause */;
-    }
-    ts.isCatchClauseVariableDeclaration = isCatchClauseVariableDeclaration;
-    // Return display name of an identifier
-    // Computed property names will just be emitted as "[<expr>]", where <expr> is the source
-    // text of the expression in the computed property.
-    function declarationNameToString(name) {
-        return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
-    }
-    ts.declarationNameToString = declarationNameToString;
-    function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
-        var sourceFile = getSourceFileOfNode(node);
-        var span = getErrorSpanForNode(sourceFile, node);
-        return ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2);
-    }
-    ts.createDiagnosticForNode = createDiagnosticForNode;
-    function createDiagnosticForNodeFromMessageChain(node, messageChain) {
-        var sourceFile = getSourceFileOfNode(node);
-        var span = getErrorSpanForNode(sourceFile, node);
-        return {
-            file: sourceFile,
-            start: span.start,
-            length: span.length,
-            code: messageChain.code,
-            category: messageChain.category,
-            messageText: messageChain.next ? messageChain : messageChain.messageText
-        };
-    }
-    ts.createDiagnosticForNodeFromMessageChain = createDiagnosticForNodeFromMessageChain;
-    function getSpanOfTokenAtPosition(sourceFile, pos) {
-        var scanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ true, sourceFile.languageVariant, sourceFile.text, /*onError:*/ undefined, pos);
-        scanner.scan();
-        var start = scanner.getTokenPos();
-        return ts.createTextSpanFromBounds(start, scanner.getTextPos());
-    }
-    ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
-    function getErrorSpanForArrowFunction(sourceFile, node) {
-        var pos = ts.skipTrivia(sourceFile.text, node.pos);
-        if (node.body && node.body.kind === 199 /* Block */) {
-            var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
-            var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
-            if (startLine < endLine) {
-                // The arrow function spans multiple lines,
-                // make the error span be the first line, inclusive.
-                return ts.createTextSpan(pos, getEndLinePosition(startLine, sourceFile) - pos + 1);
-            }
-        }
-        return ts.createTextSpanFromBounds(pos, node.end);
-    }
-    function getErrorSpanForNode(sourceFile, node) {
-        var errorNode = node;
-        switch (node.kind) {
-            case 256 /* SourceFile */:
-                var pos_1 = ts.skipTrivia(sourceFile.text, 0, /*stopAfterLineBreak*/ false);
-                if (pos_1 === sourceFile.text.length) {
-                    // file is empty - return span for the beginning of the file
-                    return ts.createTextSpan(0, 0);
-                }
-                return getSpanOfTokenAtPosition(sourceFile, pos_1);
-            // This list is a work in progress. Add missing node kinds to improve their error
-            // spans.
-            case 218 /* VariableDeclaration */:
-            case 169 /* BindingElement */:
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-            case 222 /* InterfaceDeclaration */:
-            case 225 /* ModuleDeclaration */:
-            case 224 /* EnumDeclaration */:
-            case 255 /* EnumMember */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 147 /* MethodDeclaration */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 223 /* TypeAliasDeclaration */:
-                errorNode = node.name;
-                break;
-            case 180 /* ArrowFunction */:
-                return getErrorSpanForArrowFunction(sourceFile, node);
-        }
-        if (errorNode === undefined) {
-            // If we don't have a better node, then just set the error on the first token of
-            // construct.
-            return getSpanOfTokenAtPosition(sourceFile, node.pos);
-        }
-        var pos = nodeIsMissing(errorNode)
-            ? errorNode.pos
-            : ts.skipTrivia(sourceFile.text, errorNode.pos);
-        return ts.createTextSpanFromBounds(pos, errorNode.end);
-    }
-    ts.getErrorSpanForNode = getErrorSpanForNode;
-    function isExternalOrCommonJsModule(file) {
-        return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
-    }
-    ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
-    function isDeclarationFile(file) {
-        return file.isDeclarationFile;
-    }
-    ts.isDeclarationFile = isDeclarationFile;
-    function isConstEnumDeclaration(node) {
-        return node.kind === 224 /* EnumDeclaration */ && isConst(node);
-    }
-    ts.isConstEnumDeclaration = isConstEnumDeclaration;
-    function walkUpBindingElementsAndPatterns(node) {
-        while (node && (node.kind === 169 /* BindingElement */ || isBindingPattern(node))) {
-            node = node.parent;
-        }
-        return node;
-    }
-    // Returns the node flags for this node and all relevant parent nodes.  This is done so that
-    // nodes like variable declarations and binding elements can returned a view of their flags
-    // that includes the modifiers from their container.  i.e. flags like export/declare aren't
-    // stored on the variable declaration directly, but on the containing variable statement
-    // (if it has one).  Similarly, flags for let/const are store on the variable declaration
-    // list.  By calling this function, all those flags are combined so that the client can treat
-    // the node as if it actually had those flags.
-    function getCombinedNodeFlags(node) {
-        node = walkUpBindingElementsAndPatterns(node);
-        var flags = node.flags;
-        if (node.kind === 218 /* VariableDeclaration */) {
-            node = node.parent;
-        }
-        if (node && node.kind === 219 /* VariableDeclarationList */) {
-            flags |= node.flags;
-            node = node.parent;
-        }
-        if (node && node.kind === 200 /* VariableStatement */) {
-            flags |= node.flags;
-        }
-        return flags;
-    }
-    ts.getCombinedNodeFlags = getCombinedNodeFlags;
-    function isConst(node) {
-        return !!(getCombinedNodeFlags(node) & 2048 /* Const */);
-    }
-    ts.isConst = isConst;
-    function isLet(node) {
-        return !!(getCombinedNodeFlags(node) & 1024 /* Let */);
-    }
-    ts.isLet = isLet;
-    function isSuperCallExpression(n) {
-        return n.kind === 174 /* CallExpression */ && n.expression.kind === 95 /* SuperKeyword */;
-    }
-    ts.isSuperCallExpression = isSuperCallExpression;
-    function isPrologueDirective(node) {
-        return node.kind === 202 /* ExpressionStatement */ && node.expression.kind === 9 /* StringLiteral */;
-    }
-    ts.isPrologueDirective = isPrologueDirective;
-    function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
-        return ts.getLeadingCommentRanges(sourceFileOfNode.text, node.pos);
-    }
-    ts.getLeadingCommentRangesOfNode = getLeadingCommentRangesOfNode;
-    function getLeadingCommentRangesOfNodeFromText(node, text) {
-        return ts.getLeadingCommentRanges(text, node.pos);
-    }
-    ts.getLeadingCommentRangesOfNodeFromText = getLeadingCommentRangesOfNodeFromText;
-    function getJsDocComments(node, sourceFileOfNode) {
-        return getJsDocCommentsFromText(node, sourceFileOfNode.text);
-    }
-    ts.getJsDocComments = getJsDocComments;
-    function getJsDocCommentsFromText(node, text) {
-        var commentRanges = (node.kind === 142 /* Parameter */ || node.kind === 141 /* TypeParameter */) ?
-            ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
-            getLeadingCommentRangesOfNodeFromText(node, text);
-        return ts.filter(commentRanges, isJsDocComment);
-        function isJsDocComment(comment) {
-            // True if the comment starts with '/**' but not if it is '/**/'
-            return text.charCodeAt(comment.pos + 1) === 42 /* asterisk */ &&
-                text.charCodeAt(comment.pos + 2) === 42 /* asterisk */ &&
-                text.charCodeAt(comment.pos + 3) !== 47 /* slash */;
-        }
-    }
-    ts.getJsDocCommentsFromText = getJsDocCommentsFromText;
-    ts.fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
-    ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx = /^(\/\/\/\s*<reference\s+types\s*=\s*)('|")(.+?)\2.*?\/>/;
-    ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
-    function isTypeNode(node) {
-        if (154 /* FirstTypeNode */ <= node.kind && node.kind <= 166 /* LastTypeNode */) {
-            return true;
-        }
-        switch (node.kind) {
-            case 117 /* AnyKeyword */:
-            case 130 /* NumberKeyword */:
-            case 132 /* StringKeyword */:
-            case 120 /* BooleanKeyword */:
-            case 133 /* SymbolKeyword */:
-            case 135 /* UndefinedKeyword */:
-            case 127 /* NeverKeyword */:
-                return true;
-            case 103 /* VoidKeyword */:
-                return node.parent.kind !== 183 /* VoidExpression */;
-            case 194 /* ExpressionWithTypeArguments */:
-                return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
-            // Identifiers and qualified names may be type nodes, depending on their context. Climb
-            // above them to find the lowest container
-            case 69 /* Identifier */:
-                // If the identifier is the RHS of a qualified name, then it's a type iff its parent is.
-                if (node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node) {
-                    node = node.parent;
-                }
-                else if (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node) {
-                    node = node.parent;
-                }
-                // At this point, node is either a qualified name or an identifier
-                ts.Debug.assert(node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */ || node.kind === 172 /* PropertyAccessExpression */, "'node' was expected to be a qualified name, identifier or property access in 'isTypeNode'.");
-            case 139 /* QualifiedName */:
-            case 172 /* PropertyAccessExpression */:
-            case 97 /* ThisKeyword */:
-                var parent_1 = node.parent;
-                if (parent_1.kind === 158 /* TypeQuery */) {
-                    return false;
-                }
-                // Do not recursively call isTypeNode on the parent. In the example:
-                //
-                //     let a: A.B.C;
-                //
-                // Calling isTypeNode would consider the qualified name A.B a type node. Only C or
-                // A.B.C is a type node.
-                if (154 /* FirstTypeNode */ <= parent_1.kind && parent_1.kind <= 166 /* LastTypeNode */) {
-                    return true;
-                }
-                switch (parent_1.kind) {
-                    case 194 /* ExpressionWithTypeArguments */:
-                        return !isExpressionWithTypeArgumentsInClassExtendsClause(parent_1);
-                    case 141 /* TypeParameter */:
-                        return node === parent_1.constraint;
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 142 /* Parameter */:
-                    case 218 /* VariableDeclaration */:
-                        return node === parent_1.type;
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 148 /* Constructor */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        return node === parent_1.type;
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                        return node === parent_1.type;
-                    case 177 /* TypeAssertionExpression */:
-                        return node === parent_1.type;
-                    case 174 /* CallExpression */:
-                    case 175 /* NewExpression */:
-                        return parent_1.typeArguments && ts.indexOf(parent_1.typeArguments, node) >= 0;
-                    case 176 /* TaggedTemplateExpression */:
-                        // TODO (drosen): TaggedTemplateExpressions may eventually support type arguments.
-                        return false;
-                }
-        }
-        return false;
-    }
-    ts.isTypeNode = isTypeNode;
-    // Warning: This has the same semantics as the forEach family of functions,
-    //          in that traversal terminates in the event that 'visitor' supplies a truthy value.
-    function forEachReturnStatement(body, visitor) {
-        return traverse(body);
-        function traverse(node) {
-            switch (node.kind) {
-                case 211 /* ReturnStatement */:
-                    return visitor(node);
-                case 227 /* CaseBlock */:
-                case 199 /* Block */:
-                case 203 /* IfStatement */:
-                case 204 /* DoStatement */:
-                case 205 /* WhileStatement */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                case 212 /* WithStatement */:
-                case 213 /* SwitchStatement */:
-                case 249 /* CaseClause */:
-                case 250 /* DefaultClause */:
-                case 214 /* LabeledStatement */:
-                case 216 /* TryStatement */:
-                case 252 /* CatchClause */:
-                    return ts.forEachChild(node, traverse);
-            }
-        }
-    }
-    ts.forEachReturnStatement = forEachReturnStatement;
-    function forEachYieldExpression(body, visitor) {
-        return traverse(body);
-        function traverse(node) {
-            switch (node.kind) {
-                case 190 /* YieldExpression */:
-                    visitor(node);
-                    var operand = node.expression;
-                    if (operand) {
-                        traverse(operand);
-                    }
-                case 224 /* EnumDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
-                    // These are not allowed inside a generator now, but eventually they may be allowed
-                    // as local types. Regardless, any yield statements contained within them should be
-                    // skipped in this traversal.
-                    return;
-                default:
-                    if (isFunctionLike(node)) {
-                        var name_5 = node.name;
-                        if (name_5 && name_5.kind === 140 /* ComputedPropertyName */) {
-                            // Note that we will not include methods/accessors of a class because they would require
-                            // first descending into the class. This is by design.
-                            traverse(name_5.expression);
-                            return;
-                        }
-                    }
-                    else if (!isTypeNode(node)) {
-                        // This is the general case, which should include mostly expressions and statements.
-                        // Also includes NodeArrays.
-                        ts.forEachChild(node, traverse);
-                    }
-            }
-        }
-    }
-    ts.forEachYieldExpression = forEachYieldExpression;
-    function isVariableLike(node) {
-        if (node) {
-            switch (node.kind) {
-                case 169 /* BindingElement */:
-                case 255 /* EnumMember */:
-                case 142 /* Parameter */:
-                case 253 /* PropertyAssignment */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 254 /* ShorthandPropertyAssignment */:
-                case 218 /* VariableDeclaration */:
-                    return true;
-            }
-        }
-        return false;
-    }
-    ts.isVariableLike = isVariableLike;
-    function isAccessor(node) {
-        return node && (node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */);
-    }
-    ts.isAccessor = isAccessor;
-    function isClassLike(node) {
-        return node && (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */);
-    }
-    ts.isClassLike = isClassLike;
-    function isFunctionLike(node) {
-        return node && isFunctionLikeKind(node.kind);
-    }
-    ts.isFunctionLike = isFunctionLike;
-    function isFunctionLikeKind(kind) {
-        switch (kind) {
-            case 148 /* Constructor */:
-            case 179 /* FunctionExpression */:
-            case 220 /* FunctionDeclaration */:
-            case 180 /* ArrowFunction */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 151 /* CallSignature */:
-            case 152 /* ConstructSignature */:
-            case 153 /* IndexSignature */:
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
-                return true;
-        }
-    }
-    ts.isFunctionLikeKind = isFunctionLikeKind;
-    function introducesArgumentsExoticObject(node) {
-        switch (node.kind) {
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-                return true;
-        }
-        return false;
-    }
-    ts.introducesArgumentsExoticObject = introducesArgumentsExoticObject;
-    function isIterationStatement(node, lookInLabeledStatements) {
-        switch (node.kind) {
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-            case 204 /* DoStatement */:
-            case 205 /* WhileStatement */:
-                return true;
-            case 214 /* LabeledStatement */:
-                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
-        }
-        return false;
-    }
-    ts.isIterationStatement = isIterationStatement;
-    function isFunctionBlock(node) {
-        return node && node.kind === 199 /* Block */ && isFunctionLike(node.parent);
-    }
-    ts.isFunctionBlock = isFunctionBlock;
-    function isObjectLiteralMethod(node) {
-        return node && node.kind === 147 /* MethodDeclaration */ && node.parent.kind === 171 /* ObjectLiteralExpression */;
-    }
-    ts.isObjectLiteralMethod = isObjectLiteralMethod;
-    function isIdentifierTypePredicate(predicate) {
-        return predicate && predicate.kind === 1 /* Identifier */;
-    }
-    ts.isIdentifierTypePredicate = isIdentifierTypePredicate;
-    function isThisTypePredicate(predicate) {
-        return predicate && predicate.kind === 0 /* This */;
-    }
-    ts.isThisTypePredicate = isThisTypePredicate;
-    function getContainingFunction(node) {
-        while (true) {
-            node = node.parent;
-            if (!node || isFunctionLike(node)) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingFunction = getContainingFunction;
-    function getContainingFunctionOrModule(node) {
-        while (true) {
-            node = node.parent;
-            if (isFunctionLike(node) || node.kind === 225 /* ModuleDeclaration */ || node.kind === 256 /* SourceFile */) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingFunctionOrModule = getContainingFunctionOrModule;
-    function getContainingClass(node) {
-        while (true) {
-            node = node.parent;
-            if (!node || isClassLike(node)) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingClass = getContainingClass;
-    function getThisContainer(node, includeArrowFunctions) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return undefined;
-            }
-            switch (node.kind) {
-                case 140 /* ComputedPropertyName */:
-                    // If the grandparent node is an object literal (as opposed to a class),
-                    // then the computed property is not a 'this' container.
-                    // A computed property name in a class needs to be a this container
-                    // so that we can error on it.
-                    if (isClassLike(node.parent.parent)) {
-                        return node;
-                    }
-                    // If this is a computed property, then the parent should not
-                    // make it a this container. The parent might be a property
-                    // in an object literal, like a method or accessor. But in order for
-                    // such a parent to be a this container, the reference must be in
-                    // the *body* of the container.
-                    node = node.parent;
-                    break;
-                case 143 /* Decorator */:
-                    // Decorators are always applied outside of the body of a class or method.
-                    if (node.parent.kind === 142 /* Parameter */ && isClassElement(node.parent.parent)) {
-                        // If the decorator's parent is a Parameter, we resolve the this container from
-                        // the grandparent class declaration.
-                        node = node.parent.parent;
-                    }
-                    else if (isClassElement(node.parent)) {
-                        // If the decorator's parent is a class element, we resolve the 'this' container
-                        // from the parent class declaration.
-                        node = node.parent;
-                    }
-                    break;
-                case 180 /* ArrowFunction */:
-                    if (!includeArrowFunctions) {
-                        continue;
-                    }
-                // Fall through
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 225 /* ModuleDeclaration */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                case 224 /* EnumDeclaration */:
-                case 256 /* SourceFile */:
-                    return node;
-            }
-        }
-    }
-    ts.getThisContainer = getThisContainer;
-    /**
-      * Given an super call\property node returns a closest node where either
-      * - super call\property is legal in the node and not legal in the parent node the node.
-      *   i.e. super call is legal in constructor but not legal in the class body.
-      * - node is arrow function (so caller might need to call getSuperContainer in case it needs to climb higher)
-      * - super call\property is definitely illegal in the node (but might be legal in some subnode)
-      *   i.e. super property access is illegal in function declaration but can be legal in the statement list
-      */
-    function getSuperContainer(node, stopOnFunctions) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return node;
-            }
-            switch (node.kind) {
-                case 140 /* ComputedPropertyName */:
-                    node = node.parent;
-                    break;
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    if (!stopOnFunctions) {
-                        continue;
-                    }
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return node;
-                case 143 /* Decorator */:
-                    // Decorators are always applied outside of the body of a class or method.
-                    if (node.parent.kind === 142 /* Parameter */ && isClassElement(node.parent.parent)) {
-                        // If the decorator's parent is a Parameter, we resolve the this container from
-                        // the grandparent class declaration.
-                        node = node.parent.parent;
-                    }
-                    else if (isClassElement(node.parent)) {
-                        // If the decorator's parent is a class element, we resolve the 'this' container
-                        // from the parent class declaration.
-                        node = node.parent;
-                    }
-                    break;
-            }
-        }
-    }
-    ts.getSuperContainer = getSuperContainer;
-    /**
-     * Determines whether a node is a property or element access expression for super.
-     */
-    function isSuperPropertyOrElementAccess(node) {
-        return (node.kind === 172 /* PropertyAccessExpression */
-            || node.kind === 173 /* ElementAccessExpression */)
-            && node.expression.kind === 95 /* SuperKeyword */;
-    }
-    ts.isSuperPropertyOrElementAccess = isSuperPropertyOrElementAccess;
-    function getEntityNameFromTypeNode(node) {
-        if (node) {
-            switch (node.kind) {
-                case 155 /* TypeReference */:
-                    return node.typeName;
-                case 194 /* ExpressionWithTypeArguments */:
-                    return node.expression;
-                case 69 /* Identifier */:
-                case 139 /* QualifiedName */:
-                    return node;
-            }
-        }
-        return undefined;
-    }
-    ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
-    function getInvokedExpression(node) {
-        if (node.kind === 176 /* TaggedTemplateExpression */) {
-            return node.tag;
-        }
-        // Will either be a CallExpression, NewExpression, or Decorator.
-        return node.expression;
-    }
-    ts.getInvokedExpression = getInvokedExpression;
-    function nodeCanBeDecorated(node) {
-        switch (node.kind) {
-            case 221 /* ClassDeclaration */:
-                // classes are valid targets
-                return true;
-            case 145 /* PropertyDeclaration */:
-                // property declarations are valid if their parent is a class declaration.
-                return node.parent.kind === 221 /* ClassDeclaration */;
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 147 /* MethodDeclaration */:
-                // if this method has a body and its parent is a class declaration, this is a valid target.
-                return node.body !== undefined
-                    && node.parent.kind === 221 /* ClassDeclaration */;
-            case 142 /* Parameter */:
-                // if the parameter's parent has a body and its grandparent is a class declaration, this is a valid target;
-                return node.parent.body !== undefined
-                    && (node.parent.kind === 148 /* Constructor */
-                        || node.parent.kind === 147 /* MethodDeclaration */
-                        || node.parent.kind === 150 /* SetAccessor */)
-                    && node.parent.parent.kind === 221 /* ClassDeclaration */;
-        }
-        return false;
-    }
-    ts.nodeCanBeDecorated = nodeCanBeDecorated;
-    function nodeIsDecorated(node) {
-        return node.decorators !== undefined
-            && nodeCanBeDecorated(node);
-    }
-    ts.nodeIsDecorated = nodeIsDecorated;
-    function isPropertyAccessExpression(node) {
-        return node.kind === 172 /* PropertyAccessExpression */;
-    }
-    ts.isPropertyAccessExpression = isPropertyAccessExpression;
-    function isElementAccessExpression(node) {
-        return node.kind === 173 /* ElementAccessExpression */;
-    }
-    ts.isElementAccessExpression = isElementAccessExpression;
-    function isJSXTagName(node) {
-        var parent = node.parent;
-        if (parent.kind === 243 /* JsxOpeningElement */ ||
-            parent.kind === 242 /* JsxSelfClosingElement */ ||
-            parent.kind === 245 /* JsxClosingElement */) {
-            return parent.tagName === node;
-        }
-        return false;
-    }
-    ts.isJSXTagName = isJSXTagName;
-    function isExpression(node) {
-        switch (node.kind) {
-            case 97 /* ThisKeyword */:
-            case 95 /* SuperKeyword */:
-            case 93 /* NullKeyword */:
-            case 99 /* TrueKeyword */:
-            case 84 /* FalseKeyword */:
-            case 10 /* RegularExpressionLiteral */:
-            case 170 /* ArrayLiteralExpression */:
-            case 171 /* ObjectLiteralExpression */:
-            case 172 /* PropertyAccessExpression */:
-            case 173 /* ElementAccessExpression */:
-            case 174 /* CallExpression */:
-            case 175 /* NewExpression */:
-            case 176 /* TaggedTemplateExpression */:
-            case 195 /* AsExpression */:
-            case 177 /* TypeAssertionExpression */:
-            case 196 /* NonNullExpression */:
-            case 178 /* ParenthesizedExpression */:
-            case 179 /* FunctionExpression */:
-            case 192 /* ClassExpression */:
-            case 180 /* ArrowFunction */:
-            case 183 /* VoidExpression */:
-            case 181 /* DeleteExpression */:
-            case 182 /* TypeOfExpression */:
-            case 185 /* PrefixUnaryExpression */:
-            case 186 /* PostfixUnaryExpression */:
-            case 187 /* BinaryExpression */:
-            case 188 /* ConditionalExpression */:
-            case 191 /* SpreadElementExpression */:
-            case 189 /* TemplateExpression */:
-            case 11 /* NoSubstitutionTemplateLiteral */:
-            case 193 /* OmittedExpression */:
-            case 241 /* JsxElement */:
-            case 242 /* JsxSelfClosingElement */:
-            case 190 /* YieldExpression */:
-            case 184 /* AwaitExpression */:
-                return true;
-            case 139 /* QualifiedName */:
-                while (node.parent.kind === 139 /* QualifiedName */) {
-                    node = node.parent;
-                }
-                return node.parent.kind === 158 /* TypeQuery */ || isJSXTagName(node);
-            case 69 /* Identifier */:
-                if (node.parent.kind === 158 /* TypeQuery */ || isJSXTagName(node)) {
-                    return true;
-                }
-            // fall through
-            case 8 /* NumericLiteral */:
-            case 9 /* StringLiteral */:
-            case 97 /* ThisKeyword */:
-                var parent_2 = node.parent;
-                switch (parent_2.kind) {
-                    case 218 /* VariableDeclaration */:
-                    case 142 /* Parameter */:
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 255 /* EnumMember */:
-                    case 253 /* PropertyAssignment */:
-                    case 169 /* BindingElement */:
-                        return parent_2.initializer === node;
-                    case 202 /* ExpressionStatement */:
-                    case 203 /* IfStatement */:
-                    case 204 /* DoStatement */:
-                    case 205 /* WhileStatement */:
-                    case 211 /* ReturnStatement */:
-                    case 212 /* WithStatement */:
-                    case 213 /* SwitchStatement */:
-                    case 249 /* CaseClause */:
-                    case 215 /* ThrowStatement */:
-                    case 213 /* SwitchStatement */:
-                        return parent_2.expression === node;
-                    case 206 /* ForStatement */:
-                        var forStatement = parent_2;
-                        return (forStatement.initializer === node && forStatement.initializer.kind !== 219 /* VariableDeclarationList */) ||
-                            forStatement.condition === node ||
-                            forStatement.incrementor === node;
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                        var forInStatement = parent_2;
-                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 219 /* VariableDeclarationList */) ||
-                            forInStatement.expression === node;
-                    case 177 /* TypeAssertionExpression */:
-                    case 195 /* AsExpression */:
-                        return node === parent_2.expression;
-                    case 197 /* TemplateSpan */:
-                        return node === parent_2.expression;
-                    case 140 /* ComputedPropertyName */:
-                        return node === parent_2.expression;
-                    case 143 /* Decorator */:
-                    case 248 /* JsxExpression */:
-                    case 247 /* JsxSpreadAttribute */:
-                        return true;
-                    case 194 /* ExpressionWithTypeArguments */:
-                        return parent_2.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent_2);
-                    default:
-                        if (isExpression(parent_2)) {
-                            return true;
-                        }
-                }
-        }
-        return false;
-    }
-    ts.isExpression = isExpression;
-    function isExternalModuleNameRelative(moduleName) {
-        // TypeScript 1.0 spec (April 2014): 11.2.1
-        // An external module name is "relative" if the first term is "." or "..".
-        return moduleName.substr(0, 2) === "./" || moduleName.substr(0, 3) === "../" || moduleName.substr(0, 2) === ".\\" || moduleName.substr(0, 3) === "..\\";
-    }
-    ts.isExternalModuleNameRelative = isExternalModuleNameRelative;
-    function isInstantiatedModule(node, preserveConstEnums) {
-        var moduleState = ts.getModuleInstanceState(node);
-        return moduleState === 1 /* Instantiated */ ||
-            (preserveConstEnums && moduleState === 2 /* ConstEnumOnly */);
-    }
-    ts.isInstantiatedModule = isInstantiatedModule;
-    function isExternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 240 /* ExternalModuleReference */;
-    }
-    ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
-    function getExternalModuleImportEqualsDeclarationExpression(node) {
-        ts.Debug.assert(isExternalModuleImportEqualsDeclaration(node));
-        return node.moduleReference.expression;
-    }
-    ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
-    function isInternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind !== 240 /* ExternalModuleReference */;
-    }
-    ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
-    function isSourceFileJavaScript(file) {
-        return isInJavaScriptFile(file);
-    }
-    ts.isSourceFileJavaScript = isSourceFileJavaScript;
-    function isInJavaScriptFile(node) {
-        return node && !!(node.flags & 134217728 /* JavaScriptFile */);
-    }
-    ts.isInJavaScriptFile = isInJavaScriptFile;
-    /**
-     * Returns true if the node is a CallExpression to the identifier 'require' with
-     * exactly one argument.
-     * This function does not test if the node is in a JavaScript file or not.
-    */
-    function isRequireCall(expression, checkArgumentIsStringLiteral) {
-        // of the form 'require("name")'
-        var isRequire = expression.kind === 174 /* CallExpression */ &&
-            expression.expression.kind === 69 /* Identifier */ &&
-            expression.expression.text === "require" &&
-            expression.arguments.length === 1;
-        return isRequire && (!checkArgumentIsStringLiteral || expression.arguments[0].kind === 9 /* StringLiteral */);
-    }
-    ts.isRequireCall = isRequireCall;
-    function isSingleOrDoubleQuote(charCode) {
-        return charCode === 39 /* singleQuote */ || charCode === 34 /* doubleQuote */;
-    }
-    ts.isSingleOrDoubleQuote = isSingleOrDoubleQuote;
-    /// Given a BinaryExpression, returns SpecialPropertyAssignmentKind for the various kinds of property
-    /// assignments we treat as special in the binder
-    function getSpecialPropertyAssignmentKind(expression) {
-        if (!isInJavaScriptFile(expression)) {
-            return 0 /* None */;
-        }
-        if (expression.kind !== 187 /* BinaryExpression */) {
-            return 0 /* None */;
-        }
-        var expr = expression;
-        if (expr.operatorToken.kind !== 56 /* EqualsToken */ || expr.left.kind !== 172 /* PropertyAccessExpression */) {
-            return 0 /* None */;
-        }
-        var lhs = expr.left;
-        if (lhs.expression.kind === 69 /* Identifier */) {
-            var lhsId = lhs.expression;
-            if (lhsId.text === "exports") {
-                // exports.name = expr
-                return 1 /* ExportsProperty */;
-            }
-            else if (lhsId.text === "module" && lhs.name.text === "exports") {
-                // module.exports = expr
-                return 2 /* ModuleExports */;
-            }
-        }
-        else if (lhs.expression.kind === 97 /* ThisKeyword */) {
-            return 4 /* ThisProperty */;
-        }
-        else if (lhs.expression.kind === 172 /* PropertyAccessExpression */) {
-            // chained dot, e.g. x.y.z = expr; this var is the 'x.y' part
-            var innerPropertyAccess = lhs.expression;
-            if (innerPropertyAccess.expression.kind === 69 /* Identifier */) {
-                // module.exports.name = expr
-                var innerPropertyAccessIdentifier = innerPropertyAccess.expression;
-                if (innerPropertyAccessIdentifier.text === "module" && innerPropertyAccess.name.text === "exports") {
-                    return 1 /* ExportsProperty */;
-                }
-                if (innerPropertyAccess.name.text === "prototype") {
-                    return 3 /* PrototypeProperty */;
-                }
-            }
-        }
-        return 0 /* None */;
-    }
-    ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
-    function getExternalModuleName(node) {
-        if (node.kind === 230 /* ImportDeclaration */) {
-            return node.moduleSpecifier;
-        }
-        if (node.kind === 229 /* ImportEqualsDeclaration */) {
-            var reference = node.moduleReference;
-            if (reference.kind === 240 /* ExternalModuleReference */) {
-                return reference.expression;
-            }
-        }
-        if (node.kind === 236 /* ExportDeclaration */) {
-            return node.moduleSpecifier;
-        }
-        if (node.kind === 225 /* ModuleDeclaration */ && node.name.kind === 9 /* StringLiteral */) {
-            return node.name;
-        }
-    }
-    ts.getExternalModuleName = getExternalModuleName;
-    function hasQuestionToken(node) {
-        if (node) {
-            switch (node.kind) {
-                case 142 /* Parameter */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 254 /* ShorthandPropertyAssignment */:
-                case 253 /* PropertyAssignment */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    return node.questionToken !== undefined;
-            }
-        }
-        return false;
-    }
-    ts.hasQuestionToken = hasQuestionToken;
-    function isJSDocConstructSignature(node) {
-        return node.kind === 269 /* JSDocFunctionType */ &&
-            node.parameters.length > 0 &&
-            node.parameters[0].type.kind === 271 /* JSDocConstructorType */;
-    }
-    ts.isJSDocConstructSignature = isJSDocConstructSignature;
-    function getJSDocTag(node, kind, checkParentVariableStatement) {
-        if (!node) {
-            return undefined;
-        }
-        var jsDocComment = getJSDocComment(node, checkParentVariableStatement);
-        if (!jsDocComment) {
-            return undefined;
-        }
-        for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-            var tag = _a[_i];
-            if (tag.kind === kind) {
-                return tag;
-            }
-        }
-    }
-    function getJSDocComment(node, checkParentVariableStatement) {
-        if (node.jsDocComment) {
-            return node.jsDocComment;
-        }
-        // Try to recognize this pattern when node is initializer of variable declaration and JSDoc comments are on containing variable statement.
-        // /**
-        //   * @param {number} name
-        //   * @returns {number}
-        //   */
-        // var x = function(name) { return name.length; }
-        if (checkParentVariableStatement) {
-            var isInitializerOfVariableDeclarationInStatement = node.parent.kind === 218 /* VariableDeclaration */ &&
-                node.parent.initializer === node &&
-                node.parent.parent.parent.kind === 200 /* VariableStatement */;
-            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent : undefined;
-            if (variableStatementNode) {
-                return variableStatementNode.jsDocComment;
-            }
-            // Also recognize when the node is the RHS of an assignment expression
-            var parent_3 = node.parent;
-            var isSourceOfAssignmentExpressionStatement = parent_3 && parent_3.parent &&
-                parent_3.kind === 187 /* BinaryExpression */ &&
-                parent_3.operatorToken.kind === 56 /* EqualsToken */ &&
-                parent_3.parent.kind === 202 /* ExpressionStatement */;
-            if (isSourceOfAssignmentExpressionStatement) {
-                return parent_3.parent.jsDocComment;
-            }
-            var isPropertyAssignmentExpression = parent_3 && parent_3.kind === 253 /* PropertyAssignment */;
-            if (isPropertyAssignmentExpression) {
-                return parent_3.jsDocComment;
-            }
-        }
-        return undefined;
-    }
-    function getJSDocTypeTag(node) {
-        return getJSDocTag(node, 277 /* JSDocTypeTag */, /*checkParentVariableStatement*/ false);
-    }
-    ts.getJSDocTypeTag = getJSDocTypeTag;
-    function getJSDocReturnTag(node) {
-        return getJSDocTag(node, 276 /* JSDocReturnTag */, /*checkParentVariableStatement*/ true);
-    }
-    ts.getJSDocReturnTag = getJSDocReturnTag;
-    function getJSDocTemplateTag(node) {
-        return getJSDocTag(node, 278 /* JSDocTemplateTag */, /*checkParentVariableStatement*/ false);
-    }
-    ts.getJSDocTemplateTag = getJSDocTemplateTag;
-    function getCorrespondingJSDocParameterTag(parameter) {
-        if (parameter.name && parameter.name.kind === 69 /* Identifier */) {
-            // If it's a parameter, see if the parent has a jsdoc comment with an @param
-            // annotation.
-            var parameterName = parameter.name.text;
-            var jsDocComment = getJSDocComment(parameter.parent, /*checkParentVariableStatement*/ true);
-            if (jsDocComment) {
-                for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-                    var tag = _a[_i];
-                    if (tag.kind === 275 /* JSDocParameterTag */) {
-                        var parameterTag = tag;
-                        var name_6 = parameterTag.preParameterName || parameterTag.postParameterName;
-                        if (name_6.text === parameterName) {
-                            return parameterTag;
-                        }
-                    }
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getCorrespondingJSDocParameterTag = getCorrespondingJSDocParameterTag;
-    function hasRestParameter(s) {
-        return isRestParameter(ts.lastOrUndefined(s.parameters));
-    }
-    ts.hasRestParameter = hasRestParameter;
-    function hasDeclaredRestParameter(s) {
-        return isDeclaredRestParam(ts.lastOrUndefined(s.parameters));
-    }
-    ts.hasDeclaredRestParameter = hasDeclaredRestParameter;
-    function isRestParameter(node) {
-        if (node && (node.flags & 134217728 /* JavaScriptFile */)) {
-            if (node.type && node.type.kind === 270 /* JSDocVariadicType */) {
-                return true;
-            }
-            var paramTag = getCorrespondingJSDocParameterTag(node);
-            if (paramTag && paramTag.typeExpression) {
-                return paramTag.typeExpression.type.kind === 270 /* JSDocVariadicType */;
-            }
-        }
-        return isDeclaredRestParam(node);
-    }
-    ts.isRestParameter = isRestParameter;
-    function isDeclaredRestParam(node) {
-        return node && node.dotDotDotToken !== undefined;
-    }
-    ts.isDeclaredRestParam = isDeclaredRestParam;
-    function isLiteralKind(kind) {
-        return 8 /* FirstLiteralToken */ <= kind && kind <= 11 /* LastLiteralToken */;
-    }
-    ts.isLiteralKind = isLiteralKind;
-    function isTextualLiteralKind(kind) {
-        return kind === 9 /* StringLiteral */ || kind === 11 /* NoSubstitutionTemplateLiteral */;
-    }
-    ts.isTextualLiteralKind = isTextualLiteralKind;
-    function isTemplateLiteralKind(kind) {
-        return 11 /* FirstTemplateToken */ <= kind && kind <= 14 /* LastTemplateToken */;
-    }
-    ts.isTemplateLiteralKind = isTemplateLiteralKind;
-    function isBindingPattern(node) {
-        return !!node && (node.kind === 168 /* ArrayBindingPattern */ || node.kind === 167 /* ObjectBindingPattern */);
-    }
-    ts.isBindingPattern = isBindingPattern;
-    // A node is an assignment target if it is on the left hand side of an '=' token, if it is parented by a property
-    // assignment in an object literal that is an assignment target, or if it is parented by an array literal that is
-    // an assignment target. Examples include 'a = xxx', '{ p: a } = xxx', '[{ p: a}] = xxx'.
-    function isAssignmentTarget(node) {
-        while (node.parent.kind === 178 /* ParenthesizedExpression */) {
-            node = node.parent;
-        }
-        while (true) {
-            var parent_4 = node.parent;
-            if (parent_4.kind === 170 /* ArrayLiteralExpression */ || parent_4.kind === 191 /* SpreadElementExpression */) {
-                node = parent_4;
-                continue;
-            }
-            if (parent_4.kind === 253 /* PropertyAssignment */ || parent_4.kind === 254 /* ShorthandPropertyAssignment */) {
-                node = parent_4.parent;
-                continue;
-            }
-            return parent_4.kind === 187 /* BinaryExpression */ &&
-                parent_4.operatorToken.kind === 56 /* EqualsToken */ &&
-                parent_4.left === node ||
-                (parent_4.kind === 207 /* ForInStatement */ || parent_4.kind === 208 /* ForOfStatement */) &&
-                    parent_4.initializer === node;
-        }
-    }
-    ts.isAssignmentTarget = isAssignmentTarget;
-    function isNodeDescendentOf(node, ancestor) {
-        while (node) {
-            if (node === ancestor)
-                return true;
-            node = node.parent;
-        }
-        return false;
-    }
-    ts.isNodeDescendentOf = isNodeDescendentOf;
-    function isInAmbientContext(node) {
-        while (node) {
-            if (node.flags & 2 /* Ambient */ || (node.kind === 256 /* SourceFile */ && node.isDeclarationFile)) {
-                return true;
-            }
-            node = node.parent;
-        }
-        return false;
-    }
-    ts.isInAmbientContext = isInAmbientContext;
-    function isDeclaration(node) {
-        switch (node.kind) {
-            case 180 /* ArrowFunction */:
-            case 169 /* BindingElement */:
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-            case 148 /* Constructor */:
-            case 224 /* EnumDeclaration */:
-            case 255 /* EnumMember */:
-            case 238 /* ExportSpecifier */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 149 /* GetAccessor */:
-            case 231 /* ImportClause */:
-            case 229 /* ImportEqualsDeclaration */:
-            case 234 /* ImportSpecifier */:
-            case 222 /* InterfaceDeclaration */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 225 /* ModuleDeclaration */:
-            case 232 /* NamespaceImport */:
-            case 142 /* Parameter */:
-            case 253 /* PropertyAssignment */:
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-            case 150 /* SetAccessor */:
-            case 254 /* ShorthandPropertyAssignment */:
-            case 223 /* TypeAliasDeclaration */:
-            case 141 /* TypeParameter */:
-            case 218 /* VariableDeclaration */:
-                return true;
-        }
-        return false;
-    }
-    ts.isDeclaration = isDeclaration;
-    function isStatement(n) {
-        switch (n.kind) {
-            case 210 /* BreakStatement */:
-            case 209 /* ContinueStatement */:
-            case 217 /* DebuggerStatement */:
-            case 204 /* DoStatement */:
-            case 202 /* ExpressionStatement */:
-            case 201 /* EmptyStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-            case 206 /* ForStatement */:
-            case 203 /* IfStatement */:
-            case 214 /* LabeledStatement */:
-            case 211 /* ReturnStatement */:
-            case 213 /* SwitchStatement */:
-            case 215 /* ThrowStatement */:
-            case 216 /* TryStatement */:
-            case 200 /* VariableStatement */:
-            case 205 /* WhileStatement */:
-            case 212 /* WithStatement */:
-            case 235 /* ExportAssignment */:
-                return true;
-            default:
-                return false;
-        }
-    }
-    ts.isStatement = isStatement;
-    function isClassElement(n) {
-        switch (n.kind) {
-            case 148 /* Constructor */:
-            case 145 /* PropertyDeclaration */:
-            case 147 /* MethodDeclaration */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 146 /* MethodSignature */:
-            case 153 /* IndexSignature */:
-                return true;
-            default:
-                return false;
-        }
-    }
-    ts.isClassElement = isClassElement;
-    // True if the given identifier, string literal, or number literal is the name of a declaration node
-    function isDeclarationName(name) {
-        if (name.kind !== 69 /* Identifier */ && name.kind !== 9 /* StringLiteral */ && name.kind !== 8 /* NumericLiteral */) {
-            return false;
-        }
-        var parent = name.parent;
-        if (parent.kind === 234 /* ImportSpecifier */ || parent.kind === 238 /* ExportSpecifier */) {
-            if (parent.propertyName) {
-                return true;
-            }
-        }
-        if (isDeclaration(parent)) {
-            return parent.name === name;
-        }
-        return false;
-    }
-    ts.isDeclarationName = isDeclarationName;
-    function isLiteralComputedPropertyDeclarationName(node) {
-        return (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) &&
-            node.parent.kind === 140 /* ComputedPropertyName */ &&
-            isDeclaration(node.parent.parent);
-    }
-    ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
-    // Return true if the given identifier is classified as an IdentifierName
-    function isIdentifierName(node) {
-        var parent = node.parent;
-        switch (parent.kind) {
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 255 /* EnumMember */:
-            case 253 /* PropertyAssignment */:
-            case 172 /* PropertyAccessExpression */:
-                // Name in member declaration or property name in property access
-                return parent.name === node;
-            case 139 /* QualifiedName */:
-                // Name on right hand side of dot in a type query
-                if (parent.right === node) {
-                    while (parent.kind === 139 /* QualifiedName */) {
-                        parent = parent.parent;
-                    }
-                    return parent.kind === 158 /* TypeQuery */;
-                }
-                return false;
-            case 169 /* BindingElement */:
-            case 234 /* ImportSpecifier */:
-                // Property name in binding element or import specifier
-                return parent.propertyName === node;
-            case 238 /* ExportSpecifier */:
-                // Any name in an export specifier
-                return true;
-        }
-        return false;
-    }
-    ts.isIdentifierName = isIdentifierName;
-    // An alias symbol is created by one of the following declarations:
-    // import <symbol> = ...
-    // import <symbol> from ...
-    // import * as <symbol> from ...
-    // import { x as <symbol> } from ...
-    // export { x as <symbol> } from ...
-    // export = ...
-    // export default ...
-    function isAliasSymbolDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */ ||
-            node.kind === 228 /* NamespaceExportDeclaration */ ||
-            node.kind === 231 /* ImportClause */ && !!node.name ||
-            node.kind === 232 /* NamespaceImport */ ||
-            node.kind === 234 /* ImportSpecifier */ ||
-            node.kind === 238 /* ExportSpecifier */ ||
-            node.kind === 235 /* ExportAssignment */ && node.expression.kind === 69 /* Identifier */;
-    }
-    ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
-    function getClassExtendsHeritageClauseElement(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83 /* ExtendsKeyword */);
-        return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
-    }
-    ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
-    function getClassImplementsHeritageClauseElements(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 106 /* ImplementsKeyword */);
-        return heritageClause ? heritageClause.types : undefined;
-    }
-    ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
-    function getInterfaceBaseTypeNodes(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83 /* ExtendsKeyword */);
-        return heritageClause ? heritageClause.types : undefined;
-    }
-    ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
-    function getHeritageClause(clauses, kind) {
-        if (clauses) {
-            for (var _i = 0, clauses_1 = clauses; _i < clauses_1.length; _i++) {
-                var clause = clauses_1[_i];
-                if (clause.token === kind) {
-                    return clause;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getHeritageClause = getHeritageClause;
-    function tryResolveScriptReference(host, sourceFile, reference) {
-        if (!host.getCompilerOptions().noResolve) {
-            var referenceFileName = ts.isRootedDiskPath(reference.fileName) ? reference.fileName : ts.combinePaths(ts.getDirectoryPath(sourceFile.fileName), reference.fileName);
-            return host.getSourceFile(referenceFileName);
-        }
-    }
-    ts.tryResolveScriptReference = tryResolveScriptReference;
-    function getAncestor(node, kind) {
-        while (node) {
-            if (node.kind === kind) {
-                return node;
-            }
-            node = node.parent;
-        }
-        return undefined;
-    }
-    ts.getAncestor = getAncestor;
-    function getFileReferenceFromReferencePath(comment, commentRange) {
-        var simpleReferenceRegEx = /^\/\/\/\s*<reference\s+/gim;
-        var isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
-        if (simpleReferenceRegEx.test(comment)) {
-            if (isNoDefaultLibRegEx.test(comment)) {
-                return {
-                    isNoDefaultLib: true
-                };
-            }
-            else {
-                var refMatchResult = ts.fullTripleSlashReferencePathRegEx.exec(comment);
-                var refLibResult = !refMatchResult && ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx.exec(comment);
-                if (refMatchResult || refLibResult) {
-                    var start = commentRange.pos;
-                    var end = commentRange.end;
-                    return {
-                        fileReference: {
-                            pos: start,
-                            end: end,
-                            fileName: (refMatchResult || refLibResult)[3]
-                        },
-                        isNoDefaultLib: false,
-                        isTypeReferenceDirective: !!refLibResult
-                    };
-                }
-                return {
-                    diagnosticMessage: ts.Diagnostics.Invalid_reference_directive_syntax,
-                    isNoDefaultLib: false
-                };
-            }
-        }
-        return undefined;
-    }
-    ts.getFileReferenceFromReferencePath = getFileReferenceFromReferencePath;
-    function isKeyword(token) {
-        return 70 /* FirstKeyword */ <= token && token <= 138 /* LastKeyword */;
-    }
-    ts.isKeyword = isKeyword;
-    function isTrivia(token) {
-        return 2 /* FirstTriviaToken */ <= token && token <= 7 /* LastTriviaToken */;
-    }
-    ts.isTrivia = isTrivia;
-    function isAsyncFunctionLike(node) {
-        return isFunctionLike(node) && (node.flags & 256 /* Async */) !== 0 && !isAccessor(node);
-    }
-    ts.isAsyncFunctionLike = isAsyncFunctionLike;
-    function isStringOrNumericLiteral(kind) {
-        return kind === 9 /* StringLiteral */ || kind === 8 /* NumericLiteral */;
-    }
-    ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
-    /**
-     * A declaration has a dynamic name if both of the following are true:
-     *   1. The declaration has a computed property name
-     *   2. The computed name is *not* expressed as Symbol.<name>, where name
-     *      is a property of the Symbol constructor that denotes a built in
-     *      Symbol.
-     */
-    function hasDynamicName(declaration) {
-        return declaration.name && isDynamicName(declaration.name);
-    }
-    ts.hasDynamicName = hasDynamicName;
-    function isDynamicName(name) {
-        return name.kind === 140 /* ComputedPropertyName */ &&
-            !isStringOrNumericLiteral(name.expression.kind) &&
-            !isWellKnownSymbolSyntactically(name.expression);
-    }
-    ts.isDynamicName = isDynamicName;
-    /**
-     * Checks if the expression is of the form:
-     *    Symbol.name
-     * where Symbol is literally the word "Symbol", and name is any identifierName
-     */
-    function isWellKnownSymbolSyntactically(node) {
-        return isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
-    }
-    ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
-    function getPropertyNameForPropertyNameNode(name) {
-        if (name.kind === 69 /* Identifier */ || name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */ || name.kind === 142 /* Parameter */) {
-            return name.text;
-        }
-        if (name.kind === 140 /* ComputedPropertyName */) {
-            var nameExpression = name.expression;
-            if (isWellKnownSymbolSyntactically(nameExpression)) {
-                var rightHandSideName = nameExpression.name.text;
-                return getPropertyNameForKnownSymbolName(rightHandSideName);
-            }
-            else if (nameExpression.kind === 9 /* StringLiteral */ || nameExpression.kind === 8 /* NumericLiteral */) {
-                return nameExpression.text;
-            }
-        }
-        return undefined;
-    }
-    ts.getPropertyNameForPropertyNameNode = getPropertyNameForPropertyNameNode;
-    function getPropertyNameForKnownSymbolName(symbolName) {
-        return "__@" + symbolName;
-    }
-    ts.getPropertyNameForKnownSymbolName = getPropertyNameForKnownSymbolName;
-    /**
-     * Includes the word "Symbol" with unicode escapes
-     */
-    function isESSymbolIdentifier(node) {
-        return node.kind === 69 /* Identifier */ && node.text === "Symbol";
-    }
-    ts.isESSymbolIdentifier = isESSymbolIdentifier;
-    function isModifierKind(token) {
-        switch (token) {
-            case 115 /* AbstractKeyword */:
-            case 118 /* AsyncKeyword */:
-            case 74 /* ConstKeyword */:
-            case 122 /* DeclareKeyword */:
-            case 77 /* DefaultKeyword */:
-            case 82 /* ExportKeyword */:
-            case 112 /* PublicKeyword */:
-            case 110 /* PrivateKeyword */:
-            case 111 /* ProtectedKeyword */:
-            case 128 /* ReadonlyKeyword */:
-            case 113 /* StaticKeyword */:
-                return true;
-        }
-        return false;
-    }
-    ts.isModifierKind = isModifierKind;
-    function isParameterDeclaration(node) {
-        var root = getRootDeclaration(node);
-        return root.kind === 142 /* Parameter */;
-    }
-    ts.isParameterDeclaration = isParameterDeclaration;
-    function getRootDeclaration(node) {
-        while (node.kind === 169 /* BindingElement */) {
-            node = node.parent.parent;
-        }
-        return node;
-    }
-    ts.getRootDeclaration = getRootDeclaration;
-    function nodeStartsNewLexicalEnvironment(n) {
-        return isFunctionLike(n) || n.kind === 225 /* ModuleDeclaration */ || n.kind === 256 /* SourceFile */;
-    }
-    ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
-    /**
-     * Creates a shallow, memberwise clone of a node. The "kind", "pos", "end", "flags", and "parent"
-     * properties are excluded by default, and can be provided via the "location", "flags", and
-     * "parent" parameters.
-     * @param node The node to clone.
-     * @param location An optional TextRange to use to supply the new position.
-     * @param flags The NodeFlags to use for the cloned node.
-     * @param parent The parent for the new node.
-     */
-    function cloneNode(node, location, flags, parent) {
-        // We don't use "clone" from core.ts here, as we need to preserve the prototype chain of
-        // the original node. We also need to exclude specific properties and only include own-
-        // properties (to skip members already defined on the shared prototype).
-        var clone = location !== undefined
-            ? ts.createNode(node.kind, location.pos, location.end)
-            : createSynthesizedNode(node.kind);
-        for (var key in node) {
-            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
-                continue;
-            }
-            clone[key] = node[key];
-        }
-        if (flags !== undefined) {
-            clone.flags = flags;
-        }
-        if (parent !== undefined) {
-            clone.parent = parent;
-        }
-        return clone;
-    }
-    ts.cloneNode = cloneNode;
-    /**
-     * Creates a deep clone of an EntityName, with new parent pointers.
-     * @param node The EntityName to clone.
-     * @param parent The parent for the cloned node.
-     */
-    function cloneEntityName(node, parent) {
-        var clone = cloneNode(node, node, node.flags, parent);
-        if (isQualifiedName(clone)) {
-            var left = clone.left, right = clone.right;
-            clone.left = cloneEntityName(left, clone);
-            clone.right = cloneNode(right, right, right.flags, parent);
-        }
-        return clone;
-    }
-    ts.cloneEntityName = cloneEntityName;
-    function isQualifiedName(node) {
-        return node.kind === 139 /* QualifiedName */;
-    }
-    ts.isQualifiedName = isQualifiedName;
-    function nodeIsSynthesized(node) {
-        return node.pos === -1;
-    }
-    ts.nodeIsSynthesized = nodeIsSynthesized;
-    function createSynthesizedNode(kind, startsOnNewLine) {
-        var node = ts.createNode(kind, /* pos */ -1, /* end */ -1);
-        node.startsOnNewLine = startsOnNewLine;
-        return node;
-    }
-    ts.createSynthesizedNode = createSynthesizedNode;
-    function createSynthesizedNodeArray() {
-        var array = [];
-        array.pos = -1;
-        array.end = -1;
-        return array;
-    }
-    ts.createSynthesizedNodeArray = createSynthesizedNodeArray;
-    function createDiagnosticCollection() {
-        var nonFileDiagnostics = [];
-        var fileDiagnostics = {};
-        var diagnosticsModified = false;
-        var modificationCount = 0;
-        return {
-            add: add,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getDiagnostics: getDiagnostics,
-            getModificationCount: getModificationCount,
-            reattachFileDiagnostics: reattachFileDiagnostics
-        };
-        function getModificationCount() {
-            return modificationCount;
-        }
-        function reattachFileDiagnostics(newFile) {
-            if (!ts.hasProperty(fileDiagnostics, newFile.fileName)) {
-                return;
-            }
-            for (var _i = 0, _a = fileDiagnostics[newFile.fileName]; _i < _a.length; _i++) {
-                var diagnostic = _a[_i];
-                diagnostic.file = newFile;
-            }
-        }
-        function add(diagnostic) {
-            var diagnostics;
-            if (diagnostic.file) {
-                diagnostics = fileDiagnostics[diagnostic.file.fileName];
-                if (!diagnostics) {
-                    diagnostics = [];
-                    fileDiagnostics[diagnostic.file.fileName] = diagnostics;
-                }
-            }
-            else {
-                diagnostics = nonFileDiagnostics;
-            }
-            diagnostics.push(diagnostic);
-            diagnosticsModified = true;
-            modificationCount++;
-        }
-        function getGlobalDiagnostics() {
-            sortAndDeduplicate();
-            return nonFileDiagnostics;
-        }
-        function getDiagnostics(fileName) {
-            sortAndDeduplicate();
-            if (fileName) {
-                return fileDiagnostics[fileName] || [];
-            }
-            var allDiagnostics = [];
-            function pushDiagnostic(d) {
-                allDiagnostics.push(d);
-            }
-            ts.forEach(nonFileDiagnostics, pushDiagnostic);
-            for (var key in fileDiagnostics) {
-                if (ts.hasProperty(fileDiagnostics, key)) {
-                    ts.forEach(fileDiagnostics[key], pushDiagnostic);
-                }
-            }
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function sortAndDeduplicate() {
-            if (!diagnosticsModified) {
-                return;
-            }
-            diagnosticsModified = false;
-            nonFileDiagnostics = ts.sortAndDeduplicateDiagnostics(nonFileDiagnostics);
-            for (var key in fileDiagnostics) {
-                if (ts.hasProperty(fileDiagnostics, key)) {
-                    fileDiagnostics[key] = ts.sortAndDeduplicateDiagnostics(fileDiagnostics[key]);
-                }
-            }
-        }
-    }
-    ts.createDiagnosticCollection = createDiagnosticCollection;
-    // This consists of the first 19 unprintable ASCII characters, canonical escapes, lineSeparator,
-    // paragraphSeparator, and nextLine. The latter three are just desirable to suppress new lines in
-    // the language service. These characters should be escaped when printing, and if any characters are added,
-    // the map below must be updated. Note that this regexp *does not* include the 'delete' character.
-    // There is no reason for this other than that JSON.stringify does not handle it either.
-    var escapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
-    var escapedCharsMap = {
-        "\0": "\\0",
-        "\t": "\\t",
-        "\v": "\\v",
-        "\f": "\\f",
-        "\b": "\\b",
-        "\r": "\\r",
-        "\n": "\\n",
-        "\\": "\\\\",
-        "\"": "\\\"",
-        "\u2028": "\\u2028",
-        "\u2029": "\\u2029",
-        "\u0085": "\\u0085" // nextLine
-    };
-    /**
-     * Based heavily on the abstract 'Quote'/'QuoteJSONString' operation from ECMA-262 (24.3.2.2),
-     * but augmented for a few select characters (e.g. lineSeparator, paragraphSeparator, nextLine)
-     * Note that this doesn't actually wrap the input in double quotes.
-     */
-    function escapeString(s) {
-        s = escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, getReplacement) : s;
-        return s;
-        function getReplacement(c) {
-            return escapedCharsMap[c] || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
-        }
-    }
-    ts.escapeString = escapeString;
-    function isIntrinsicJsxName(name) {
-        var ch = name.substr(0, 1);
-        return ch.toLowerCase() === ch;
-    }
-    ts.isIntrinsicJsxName = isIntrinsicJsxName;
-    function get16BitUnicodeEscapeSequence(charCode) {
-        var hexCharCode = charCode.toString(16).toUpperCase();
-        var paddedHexCode = ("0000" + hexCharCode).slice(-4);
-        return "\\u" + paddedHexCode;
-    }
-    var nonAsciiCharacters = /[^\u0000-\u007F]/g;
-    function escapeNonAsciiCharacters(s) {
-        // Replace non-ASCII characters with '\uNNNN' escapes if any exist.
-        // Otherwise just return the original string.
-        return nonAsciiCharacters.test(s) ?
-            s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
-            s;
-    }
-    ts.escapeNonAsciiCharacters = escapeNonAsciiCharacters;
-    var indentStrings = ["", "    "];
-    function getIndentString(level) {
-        if (indentStrings[level] === undefined) {
-            indentStrings[level] = getIndentString(level - 1) + indentStrings[1];
-        }
-        return indentStrings[level];
-    }
-    ts.getIndentString = getIndentString;
-    function getIndentSize() {
-        return indentStrings[1].length;
-    }
-    ts.getIndentSize = getIndentSize;
-    function createTextWriter(newLine) {
-        var output;
-        var indent;
-        var lineStart;
-        var lineCount;
-        var linePos;
-        function write(s) {
-            if (s && s.length) {
-                if (lineStart) {
-                    output += getIndentString(indent);
-                    lineStart = false;
-                }
-                output += s;
-            }
-        }
-        function reset() {
-            output = "";
-            indent = 0;
-            lineStart = true;
-            lineCount = 0;
-            linePos = 0;
-        }
-        function rawWrite(s) {
-            if (s !== undefined) {
-                if (lineStart) {
-                    lineStart = false;
-                }
-                output += s;
-            }
-        }
-        function writeLiteral(s) {
-            if (s && s.length) {
-                write(s);
-                var lineStartsOfS = ts.computeLineStarts(s);
-                if (lineStartsOfS.length > 1) {
-                    lineCount = lineCount + lineStartsOfS.length - 1;
-                    linePos = output.length - s.length + ts.lastOrUndefined(lineStartsOfS);
-                }
-            }
-        }
-        function writeLine() {
-            if (!lineStart) {
-                output += newLine;
-                lineCount++;
-                linePos = output.length;
-                lineStart = true;
-            }
-        }
-        function writeTextOfNode(text, node) {
-            write(getTextOfNodeFromSourceText(text, node));
-        }
-        reset();
-        return {
-            write: write,
-            rawWrite: rawWrite,
-            writeTextOfNode: writeTextOfNode,
-            writeLiteral: writeLiteral,
-            writeLine: writeLine,
-            increaseIndent: function () { indent++; },
-            decreaseIndent: function () { indent--; },
-            getIndent: function () { return indent; },
-            getTextPos: function () { return output.length; },
-            getLine: function () { return lineCount + 1; },
-            getColumn: function () { return lineStart ? indent * getIndentSize() + 1 : output.length - linePos + 1; },
-            getText: function () { return output; },
-            reset: reset
-        };
-    }
-    ts.createTextWriter = createTextWriter;
-    /**
-     * Resolves a local path to a path which is absolute to the base of the emit
-     */
-    function getExternalModuleNameFromPath(host, fileName) {
-        var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
-        var dir = ts.toPath(host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
-        var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
-        var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
-        return ts.removeFileExtension(relativePath);
-    }
-    ts.getExternalModuleNameFromPath = getExternalModuleNameFromPath;
-    function getOwnEmitOutputFilePath(sourceFile, host, extension) {
-        var compilerOptions = host.getCompilerOptions();
-        var emitOutputFilePathWithoutExtension;
-        if (compilerOptions.outDir) {
-            emitOutputFilePathWithoutExtension = ts.removeFileExtension(getSourceFilePathInNewDir(sourceFile, host, compilerOptions.outDir));
-        }
-        else {
-            emitOutputFilePathWithoutExtension = ts.removeFileExtension(sourceFile.fileName);
-        }
-        return emitOutputFilePathWithoutExtension + extension;
-    }
-    ts.getOwnEmitOutputFilePath = getOwnEmitOutputFilePath;
-    function getDeclarationEmitOutputFilePath(sourceFile, host) {
-        var options = host.getCompilerOptions();
-        var outputDir = options.declarationDir || options.outDir; // Prefer declaration folder if specified
-        if (options.declaration) {
-            var path = outputDir
-                ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
-                : sourceFile.fileName;
-            return ts.removeFileExtension(path) + ".d.ts";
-        }
-    }
-    ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
-    function getEmitScriptTarget(compilerOptions) {
-        return compilerOptions.target || 0 /* ES3 */;
-    }
-    ts.getEmitScriptTarget = getEmitScriptTarget;
-    function getEmitModuleKind(compilerOptions) {
-        return typeof compilerOptions.module === "number" ?
-            compilerOptions.module :
-            getEmitScriptTarget(compilerOptions) === 2 /* ES6 */ ? ts.ModuleKind.ES6 : ts.ModuleKind.CommonJS;
-    }
-    ts.getEmitModuleKind = getEmitModuleKind;
-    function forEachExpectedEmitFile(host, action, targetSourceFile) {
-        var options = host.getCompilerOptions();
-        // Emit on each source file
-        if (options.outFile || options.out) {
-            onBundledEmit(host);
-        }
-        else {
-            var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
-            for (var _i = 0, sourceFiles_1 = sourceFiles; _i < sourceFiles_1.length; _i++) {
-                var sourceFile = sourceFiles_1[_i];
-                if (!isDeclarationFile(sourceFile)) {
-                    onSingleFileEmit(host, sourceFile);
-                }
-            }
-        }
-        function onSingleFileEmit(host, sourceFile) {
-            // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
-            // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
-            // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
-            var extension = ".js";
-            if (options.jsx === 1 /* Preserve */) {
-                if (isSourceFileJavaScript(sourceFile)) {
-                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
-                        extension = ".jsx";
-                    }
-                }
-                else if (sourceFile.languageVariant === 1 /* JSX */) {
-                    // TypeScript source file preserving JSX syntax
-                    extension = ".jsx";
-                }
-            }
-            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
-            var emitFileNames = {
-                jsFilePath: jsFilePath,
-                sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                declarationFilePath: !isSourceFileJavaScript(sourceFile) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined
-            };
-            action(emitFileNames, [sourceFile], /*isBundledEmit*/ false);
-        }
-        function onBundledEmit(host) {
-            // Can emit only sources that are not declaration file and are either non module code or module with --module or --target es6 specified
-            var bundledSources = ts.filter(host.getSourceFiles(), function (sourceFile) {
-                return !isDeclarationFile(sourceFile) // Not a declaration file
-                    && (!ts.isExternalModule(sourceFile) || !!getEmitModuleKind(options));
-            }); // and not a module, unless module emit enabled
-            if (bundledSources.length) {
-                var jsFilePath = options.outFile || options.out;
-                var emitFileNames = {
-                    jsFilePath: jsFilePath,
-                    sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                    declarationFilePath: options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined
-                };
-                action(emitFileNames, bundledSources, /*isBundledEmit*/ true);
-            }
-        }
-        function getSourceMapFilePath(jsFilePath, options) {
-            return options.sourceMap ? jsFilePath + ".map" : undefined;
-        }
-    }
-    ts.forEachExpectedEmitFile = forEachExpectedEmitFile;
-    function getSourceFilePathInNewDir(sourceFile, host, newDirPath) {
-        var sourceFilePath = ts.getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
-        sourceFilePath = sourceFilePath.replace(host.getCommonSourceDirectory(), "");
-        return ts.combinePaths(newDirPath, sourceFilePath);
-    }
-    ts.getSourceFilePathInNewDir = getSourceFilePathInNewDir;
-    function writeFile(host, diagnostics, fileName, data, writeByteOrderMark, sourceFiles) {
-        host.writeFile(fileName, data, writeByteOrderMark, function (hostErrorMessage) {
-            diagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Could_not_write_file_0_Colon_1, fileName, hostErrorMessage));
-        }, sourceFiles);
-    }
-    ts.writeFile = writeFile;
-    function getLineOfLocalPosition(currentSourceFile, pos) {
-        return ts.getLineAndCharacterOfPosition(currentSourceFile, pos).line;
-    }
-    ts.getLineOfLocalPosition = getLineOfLocalPosition;
-    function getLineOfLocalPositionFromLineMap(lineMap, pos) {
-        return ts.computeLineAndCharacterOfPosition(lineMap, pos).line;
-    }
-    ts.getLineOfLocalPositionFromLineMap = getLineOfLocalPositionFromLineMap;
-    function getFirstConstructorWithBody(node) {
-        return ts.forEach(node.members, function (member) {
-            if (member.kind === 148 /* Constructor */ && nodeIsPresent(member.body)) {
-                return member;
-            }
-        });
-    }
-    ts.getFirstConstructorWithBody = getFirstConstructorWithBody;
-    function getSetAccessorTypeAnnotationNode(accessor) {
-        if (accessor && accessor.parameters.length > 0) {
-            var hasThis = accessor.parameters.length === 2 &&
-                accessor.parameters[0].name.kind === 69 /* Identifier */ &&
-                accessor.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */;
-            return accessor.parameters[hasThis ? 1 : 0].type;
-        }
-    }
-    ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
-    function getAllAccessorDeclarations(declarations, accessor) {
-        var firstAccessor;
-        var secondAccessor;
-        var getAccessor;
-        var setAccessor;
-        if (hasDynamicName(accessor)) {
-            firstAccessor = accessor;
-            if (accessor.kind === 149 /* GetAccessor */) {
-                getAccessor = accessor;
-            }
-            else if (accessor.kind === 150 /* SetAccessor */) {
-                setAccessor = accessor;
-            }
-            else {
-                ts.Debug.fail("Accessor has wrong kind");
-            }
-        }
-        else {
-            ts.forEach(declarations, function (member) {
-                if ((member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */)
-                    && (member.flags & 32 /* Static */) === (accessor.flags & 32 /* Static */)) {
-                    var memberName = getPropertyNameForPropertyNameNode(member.name);
-                    var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
-                    if (memberName === accessorName) {
-                        if (!firstAccessor) {
-                            firstAccessor = member;
-                        }
-                        else if (!secondAccessor) {
-                            secondAccessor = member;
-                        }
-                        if (member.kind === 149 /* GetAccessor */ && !getAccessor) {
-                            getAccessor = member;
-                        }
-                        if (member.kind === 150 /* SetAccessor */ && !setAccessor) {
-                            setAccessor = member;
-                        }
-                    }
-                }
-            });
-        }
-        return {
-            firstAccessor: firstAccessor,
-            secondAccessor: secondAccessor,
-            getAccessor: getAccessor,
-            setAccessor: setAccessor
-        };
-    }
-    ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
-    function emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments) {
-        // If the leading comments start on different line than the start of node, write new line
-        if (leadingComments && leadingComments.length && node.pos !== leadingComments[0].pos &&
-            getLineOfLocalPositionFromLineMap(lineMap, node.pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
-            writer.writeLine();
-        }
-    }
-    ts.emitNewLineBeforeLeadingComments = emitNewLineBeforeLeadingComments;
-    function emitComments(text, lineMap, writer, comments, trailingSeparator, newLine, writeComment) {
-        var emitLeadingSpace = !trailingSeparator;
-        ts.forEach(comments, function (comment) {
-            if (emitLeadingSpace) {
-                writer.write(" ");
-                emitLeadingSpace = false;
-            }
-            writeComment(text, lineMap, writer, comment, newLine);
-            if (comment.hasTrailingNewLine) {
-                writer.writeLine();
-            }
-            else if (trailingSeparator) {
-                writer.write(" ");
-            }
-            else {
-                // Emit leading space to separate comment during next comment emit
-                emitLeadingSpace = true;
-            }
-        });
-    }
-    ts.emitComments = emitComments;
-    /**
-     * Detached comment is a comment at the top of file or function body that is separated from
-     * the next statement by space.
-     */
-    function emitDetachedComments(text, lineMap, writer, writeComment, node, newLine, removeComments) {
-        var leadingComments;
-        var currentDetachedCommentInfo;
-        if (removeComments) {
-            // removeComments is true, only reserve pinned comment at the top of file
-            // For example:
-            //      /*! Pinned Comment */
-            //
-            //      var x = 10;
-            if (node.pos === 0) {
-                leadingComments = ts.filter(ts.getLeadingCommentRanges(text, node.pos), isPinnedComment);
-            }
-        }
-        else {
-            // removeComments is false, just get detached as normal and bypass the process to filter comment
-            leadingComments = ts.getLeadingCommentRanges(text, node.pos);
-        }
-        if (leadingComments) {
-            var detachedComments = [];
-            var lastComment = void 0;
-            for (var _i = 0, leadingComments_1 = leadingComments; _i < leadingComments_1.length; _i++) {
-                var comment = leadingComments_1[_i];
-                if (lastComment) {
-                    var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, lastComment.end);
-                    var commentLine = getLineOfLocalPositionFromLineMap(lineMap, comment.pos);
-                    if (commentLine >= lastCommentLine + 2) {
-                        // There was a blank line between the last comment and this comment.  This
-                        // comment is not part of the copyright comments.  Return what we have so
-                        // far.
-                        break;
-                    }
-                }
-                detachedComments.push(comment);
-                lastComment = comment;
-            }
-            if (detachedComments.length) {
-                // All comments look like they could have been part of the copyright header.  Make
-                // sure there is at least one blank line between it and the node.  If not, it's not
-                // a copyright header.
-                var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, ts.lastOrUndefined(detachedComments).end);
-                var nodeLine = getLineOfLocalPositionFromLineMap(lineMap, ts.skipTrivia(text, node.pos));
-                if (nodeLine >= lastCommentLine + 2) {
-                    // Valid detachedComments
-                    emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments);
-                    emitComments(text, lineMap, writer, detachedComments, /*trailingSeparator*/ true, newLine, writeComment);
-                    currentDetachedCommentInfo = { nodePos: node.pos, detachedCommentEndPos: ts.lastOrUndefined(detachedComments).end };
-                }
-            }
-        }
-        return currentDetachedCommentInfo;
-        function isPinnedComment(comment) {
-            return text.charCodeAt(comment.pos + 1) === 42 /* asterisk */ &&
-                text.charCodeAt(comment.pos + 2) === 33 /* exclamation */;
-        }
-    }
-    ts.emitDetachedComments = emitDetachedComments;
-    function writeCommentRange(text, lineMap, writer, comment, newLine) {
-        if (text.charCodeAt(comment.pos + 1) === 42 /* asterisk */) {
-            var firstCommentLineAndCharacter = ts.computeLineAndCharacterOfPosition(lineMap, comment.pos);
-            var lineCount = lineMap.length;
-            var firstCommentLineIndent = void 0;
-            for (var pos = comment.pos, currentLine = firstCommentLineAndCharacter.line; pos < comment.end; currentLine++) {
-                var nextLineStart = (currentLine + 1) === lineCount
-                    ? text.length + 1
-                    : lineMap[currentLine + 1];
-                if (pos !== comment.pos) {
-                    // If we are not emitting first line, we need to write the spaces to adjust the alignment
-                    if (firstCommentLineIndent === undefined) {
-                        firstCommentLineIndent = calculateIndent(text, lineMap[firstCommentLineAndCharacter.line], comment.pos);
-                    }
-                    // These are number of spaces writer is going to write at current indent
-                    var currentWriterIndentSpacing = writer.getIndent() * getIndentSize();
-                    // Number of spaces we want to be writing
-                    // eg: Assume writer indent
-                    // module m {
-                    //         /* starts at character 9 this is line 1
-                    //    * starts at character pos 4 line                        --1  = 8 - 8 + 3
-                    //   More left indented comment */                            --2  = 8 - 8 + 2
-                    //     class c { }
-                    // }
-                    // module m {
-                    //     /* this is line 1 -- Assume current writer indent 8
-                    //      * line                                                --3 = 8 - 4 + 5
-                    //            More right indented comment */                  --4 = 8 - 4 + 11
-                    //     class c { }
-                    // }
-                    var spacesToEmit = currentWriterIndentSpacing - firstCommentLineIndent + calculateIndent(text, pos, nextLineStart);
-                    if (spacesToEmit > 0) {
-                        var numberOfSingleSpacesToEmit = spacesToEmit % getIndentSize();
-                        var indentSizeSpaceString = getIndentString((spacesToEmit - numberOfSingleSpacesToEmit) / getIndentSize());
-                        // Write indent size string ( in eg 1: = "", 2: "" , 3: string with 8 spaces 4: string with 12 spaces
-                        writer.rawWrite(indentSizeSpaceString);
-                        // Emit the single spaces (in eg: 1: 3 spaces, 2: 2 spaces, 3: 1 space, 4: 3 spaces)
-                        while (numberOfSingleSpacesToEmit) {
-                            writer.rawWrite(" ");
-                            numberOfSingleSpacesToEmit--;
-                        }
-                    }
-                    else {
-                        // No spaces to emit write empty string
-                        writer.rawWrite("");
-                    }
-                }
-                // Write the comment line text
-                writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart);
-                pos = nextLineStart;
-            }
-        }
-        else {
-            // Single line comment of style //....
-            writer.write(text.substring(comment.pos, comment.end));
-        }
-    }
-    ts.writeCommentRange = writeCommentRange;
-    function writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart) {
-        var end = Math.min(comment.end, nextLineStart - 1);
-        var currentLineText = text.substring(pos, end).replace(/^\s+|\s+$/g, "");
-        if (currentLineText) {
-            // trimmed forward and ending spaces text
-            writer.write(currentLineText);
-            if (end !== comment.end) {
-                writer.writeLine();
-            }
-        }
-        else {
-            // Empty string - make sure we write empty line
-            writer.writeLiteral(newLine);
-        }
-    }
-    function calculateIndent(text, pos, end) {
-        var currentLineIndent = 0;
-        for (; pos < end && ts.isWhiteSpace(text.charCodeAt(pos)); pos++) {
-            if (text.charCodeAt(pos) === 9 /* tab */) {
-                // Tabs = TabSize = indent size and go to next tabStop
-                currentLineIndent += getIndentSize() - (currentLineIndent % getIndentSize());
-            }
-            else {
-                // Single space
-                currentLineIndent++;
-            }
-        }
-        return currentLineIndent;
-    }
-    function modifierToFlag(token) {
-        switch (token) {
-            case 113 /* StaticKeyword */: return 32 /* Static */;
-            case 112 /* PublicKeyword */: return 4 /* Public */;
-            case 111 /* ProtectedKeyword */: return 16 /* Protected */;
-            case 110 /* PrivateKeyword */: return 8 /* Private */;
-            case 115 /* AbstractKeyword */: return 128 /* Abstract */;
-            case 82 /* ExportKeyword */: return 1 /* Export */;
-            case 122 /* DeclareKeyword */: return 2 /* Ambient */;
-            case 74 /* ConstKeyword */: return 2048 /* Const */;
-            case 77 /* DefaultKeyword */: return 512 /* Default */;
-            case 118 /* AsyncKeyword */: return 256 /* Async */;
-            case 128 /* ReadonlyKeyword */: return 64 /* Readonly */;
-        }
-        return 0;
-    }
-    ts.modifierToFlag = modifierToFlag;
-    function isLeftHandSideExpression(expr) {
-        if (expr) {
-            switch (expr.kind) {
-                case 172 /* PropertyAccessExpression */:
-                case 173 /* ElementAccessExpression */:
-                case 175 /* NewExpression */:
-                case 174 /* CallExpression */:
-                case 196 /* NonNullExpression */:
-                case 241 /* JsxElement */:
-                case 242 /* JsxSelfClosingElement */:
-                case 176 /* TaggedTemplateExpression */:
-                case 170 /* ArrayLiteralExpression */:
-                case 178 /* ParenthesizedExpression */:
-                case 171 /* ObjectLiteralExpression */:
-                case 192 /* ClassExpression */:
-                case 179 /* FunctionExpression */:
-                case 69 /* Identifier */:
-                case 10 /* RegularExpressionLiteral */:
-                case 8 /* NumericLiteral */:
-                case 9 /* StringLiteral */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                case 189 /* TemplateExpression */:
-                case 84 /* FalseKeyword */:
-                case 93 /* NullKeyword */:
-                case 97 /* ThisKeyword */:
-                case 99 /* TrueKeyword */:
-                case 95 /* SuperKeyword */:
-                    return true;
-            }
-        }
-        return false;
-    }
-    ts.isLeftHandSideExpression = isLeftHandSideExpression;
-    function isAssignmentOperator(token) {
-        return token >= 56 /* FirstAssignment */ && token <= 68 /* LastAssignment */;
-    }
-    ts.isAssignmentOperator = isAssignmentOperator;
-    function isExpressionWithTypeArgumentsInClassExtendsClause(node) {
-        return node.kind === 194 /* ExpressionWithTypeArguments */ &&
-            node.parent.token === 83 /* ExtendsKeyword */ &&
-            isClassLike(node.parent.parent);
-    }
-    ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
-    // Returns false if this heritage clause element's expression contains something unsupported
-    // (i.e. not a name or dotted name).
-    function isSupportedExpressionWithTypeArguments(node) {
-        return isSupportedExpressionWithTypeArgumentsRest(node.expression);
-    }
-    ts.isSupportedExpressionWithTypeArguments = isSupportedExpressionWithTypeArguments;
-    function isSupportedExpressionWithTypeArgumentsRest(node) {
-        if (node.kind === 69 /* Identifier */) {
-            return true;
-        }
-        else if (isPropertyAccessExpression(node)) {
-            return isSupportedExpressionWithTypeArgumentsRest(node.expression);
-        }
-        else {
-            return false;
-        }
-    }
-    function isRightSideOfQualifiedNameOrPropertyAccess(node) {
-        return (node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node) ||
-            (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node);
-    }
-    ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
-    function isEmptyObjectLiteralOrArrayLiteral(expression) {
-        var kind = expression.kind;
-        if (kind === 171 /* ObjectLiteralExpression */) {
-            return expression.properties.length === 0;
-        }
-        if (kind === 170 /* ArrayLiteralExpression */) {
-            return expression.elements.length === 0;
-        }
-        return false;
-    }
-    ts.isEmptyObjectLiteralOrArrayLiteral = isEmptyObjectLiteralOrArrayLiteral;
-    function getLocalSymbolForExportDefault(symbol) {
-        return symbol && symbol.valueDeclaration && (symbol.valueDeclaration.flags & 512 /* Default */) ? symbol.valueDeclaration.localSymbol : undefined;
-    }
-    ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
-    function hasJavaScriptFileExtension(fileName) {
-        return ts.forEach(ts.supportedJavascriptExtensions, function (extension) { return ts.fileExtensionIs(fileName, extension); });
-    }
-    ts.hasJavaScriptFileExtension = hasJavaScriptFileExtension;
-    /**
-     * Replace each instance of non-ascii characters by one, two, three, or four escape sequences
-     * representing the UTF-8 encoding of the character, and return the expanded char code list.
-     */
-    function getExpandedCharCodes(input) {
-        var output = [];
-        var length = input.length;
-        for (var i = 0; i < length; i++) {
-            var charCode = input.charCodeAt(i);
-            // handel utf8
-            if (charCode < 0x80) {
-                output.push(charCode);
-            }
-            else if (charCode < 0x800) {
-                output.push((charCode >> 6) | 192);
-                output.push((charCode & 63) | 128);
-            }
-            else if (charCode < 0x10000) {
-                output.push((charCode >> 12) | 224);
-                output.push(((charCode >> 6) & 63) | 128);
-                output.push((charCode & 63) | 128);
-            }
-            else if (charCode < 0x20000) {
-                output.push((charCode >> 18) | 240);
-                output.push(((charCode >> 12) & 63) | 128);
-                output.push(((charCode >> 6) & 63) | 128);
-                output.push((charCode & 63) | 128);
-            }
-            else {
-                ts.Debug.assert(false, "Unexpected code point");
-            }
-        }
-        return output;
-    }
-    /**
-     * Serialize an object graph into a JSON string. This is intended only for use on an acyclic graph
-     * as the fallback implementation does not check for circular references by default.
-     */
-    ts.stringify = typeof JSON !== "undefined" && JSON.stringify
-        ? JSON.stringify
-        : stringifyFallback;
-    /**
-     * Serialize an object graph into a JSON string.
-     */
-    function stringifyFallback(value) {
-        // JSON.stringify returns `undefined` here, instead of the string "undefined".
-        return value === undefined ? undefined : stringifyValue(value);
-    }
-    function stringifyValue(value) {
-        return typeof value === "string" ? "\"" + escapeString(value) + "\""
-            : typeof value === "number" ? isFinite(value) ? String(value) : "null"
-                : typeof value === "boolean" ? value ? "true" : "false"
-                    : typeof value === "object" && value ? ts.isArray(value) ? cycleCheck(stringifyArray, value) : cycleCheck(stringifyObject, value)
-                        : "null";
-    }
-    function cycleCheck(cb, value) {
-        ts.Debug.assert(!value.hasOwnProperty("__cycle"), "Converting circular structure to JSON");
-        value.__cycle = true;
-        var result = cb(value);
-        delete value.__cycle;
-        return result;
-    }
-    function stringifyArray(value) {
-        return "[" + ts.reduceLeft(value, stringifyElement, "") + "]";
-    }
-    function stringifyElement(memo, value) {
-        return (memo ? memo + "," : memo) + stringifyValue(value);
-    }
-    function stringifyObject(value) {
-        return "{" + ts.reduceProperties(value, stringifyProperty, "") + "}";
-    }
-    function stringifyProperty(memo, value, key) {
-        return value === undefined || typeof value === "function" || key === "__cycle" ? memo
-            : (memo ? memo + "," : memo) + ("\"" + escapeString(key) + "\":" + stringifyValue(value));
-    }
-    var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
-    /**
-     * Converts a string to a base-64 encoded ASCII string.
-     */
-    function convertToBase64(input) {
-        var result = "";
-        var charCodes = getExpandedCharCodes(input);
-        var i = 0;
-        var length = charCodes.length;
-        var byte1, byte2, byte3, byte4;
-        while (i < length) {
-            // Convert every 6-bits in the input 3 character points
-            // into a base64 digit
-            byte1 = charCodes[i] >> 2;
-            byte2 = (charCodes[i] & 3) << 4 | charCodes[i + 1] >> 4;
-            byte3 = (charCodes[i + 1] & 15) << 2 | charCodes[i + 2] >> 6;
-            byte4 = charCodes[i + 2] & 63;
-            // We are out of characters in the input, set the extra
-            // digits to 64 (padding character).
-            if (i + 1 >= length) {
-                byte3 = byte4 = 64;
-            }
-            else if (i + 2 >= length) {
-                byte4 = 64;
-            }
-            // Write to the output
-            result += base64Digits.charAt(byte1) + base64Digits.charAt(byte2) + base64Digits.charAt(byte3) + base64Digits.charAt(byte4);
-            i += 3;
-        }
-        return result;
-    }
-    ts.convertToBase64 = convertToBase64;
-    function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
-        return !ts.isRootedDiskPath(absoluteOrRelativePath)
-            ? absoluteOrRelativePath
-            : ts.getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, /* isAbsolutePathAnUrl */ false);
-    }
-    ts.convertToRelativePath = convertToRelativePath;
-    var carriageReturnLineFeed = "\r\n";
-    var lineFeed = "\n";
-    function getNewLineCharacter(options) {
-        if (options.newLine === 0 /* CarriageReturnLineFeed */) {
-            return carriageReturnLineFeed;
-        }
-        else if (options.newLine === 1 /* LineFeed */) {
-            return lineFeed;
-        }
-        else if (ts.sys) {
-            return ts.sys.newLine;
-        }
-        return carriageReturnLineFeed;
-    }
-    ts.getNewLineCharacter = getNewLineCharacter;
-    function isWatchSet(options) {
-        // Firefox has Object.prototype.watch
-        return options.watch && options.hasOwnProperty("watch");
-    }
-    ts.isWatchSet = isWatchSet;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getDefaultLibFileName(options) {
-        return options.target === 2 /* ES6 */ ? "lib.es6.d.ts" : "lib.d.ts";
-    }
-    ts.getDefaultLibFileName = getDefaultLibFileName;
-    function textSpanEnd(span) {
-        return span.start + span.length;
-    }
-    ts.textSpanEnd = textSpanEnd;
-    function textSpanIsEmpty(span) {
-        return span.length === 0;
-    }
-    ts.textSpanIsEmpty = textSpanIsEmpty;
-    function textSpanContainsPosition(span, position) {
-        return position >= span.start && position < textSpanEnd(span);
-    }
-    ts.textSpanContainsPosition = textSpanContainsPosition;
-    // Returns true if 'span' contains 'other'.
-    function textSpanContainsTextSpan(span, other) {
-        return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
-    }
-    ts.textSpanContainsTextSpan = textSpanContainsTextSpan;
-    function textSpanOverlapsWith(span, other) {
-        var overlapStart = Math.max(span.start, other.start);
-        var overlapEnd = Math.min(textSpanEnd(span), textSpanEnd(other));
-        return overlapStart < overlapEnd;
-    }
-    ts.textSpanOverlapsWith = textSpanOverlapsWith;
-    function textSpanOverlap(span1, span2) {
-        var overlapStart = Math.max(span1.start, span2.start);
-        var overlapEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
-        if (overlapStart < overlapEnd) {
-            return createTextSpanFromBounds(overlapStart, overlapEnd);
-        }
-        return undefined;
-    }
-    ts.textSpanOverlap = textSpanOverlap;
-    function textSpanIntersectsWithTextSpan(span, other) {
-        return other.start <= textSpanEnd(span) && textSpanEnd(other) >= span.start;
-    }
-    ts.textSpanIntersectsWithTextSpan = textSpanIntersectsWithTextSpan;
-    function textSpanIntersectsWith(span, start, length) {
-        var end = start + length;
-        return start <= textSpanEnd(span) && end >= span.start;
-    }
-    ts.textSpanIntersectsWith = textSpanIntersectsWith;
-    function decodedTextSpanIntersectsWith(start1, length1, start2, length2) {
-        var end1 = start1 + length1;
-        var end2 = start2 + length2;
-        return start2 <= end1 && end2 >= start1;
-    }
-    ts.decodedTextSpanIntersectsWith = decodedTextSpanIntersectsWith;
-    function textSpanIntersectsWithPosition(span, position) {
-        return position <= textSpanEnd(span) && position >= span.start;
-    }
-    ts.textSpanIntersectsWithPosition = textSpanIntersectsWithPosition;
-    function textSpanIntersection(span1, span2) {
-        var intersectStart = Math.max(span1.start, span2.start);
-        var intersectEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
-        if (intersectStart <= intersectEnd) {
-            return createTextSpanFromBounds(intersectStart, intersectEnd);
-        }
-        return undefined;
-    }
-    ts.textSpanIntersection = textSpanIntersection;
-    function createTextSpan(start, length) {
-        if (start < 0) {
-            throw new Error("start < 0");
-        }
-        if (length < 0) {
-            throw new Error("length < 0");
-        }
-        return { start: start, length: length };
-    }
-    ts.createTextSpan = createTextSpan;
-    function createTextSpanFromBounds(start, end) {
-        return createTextSpan(start, end - start);
-    }
-    ts.createTextSpanFromBounds = createTextSpanFromBounds;
-    function textChangeRangeNewSpan(range) {
-        return createTextSpan(range.span.start, range.newLength);
-    }
-    ts.textChangeRangeNewSpan = textChangeRangeNewSpan;
-    function textChangeRangeIsUnchanged(range) {
-        return textSpanIsEmpty(range.span) && range.newLength === 0;
-    }
-    ts.textChangeRangeIsUnchanged = textChangeRangeIsUnchanged;
-    function createTextChangeRange(span, newLength) {
-        if (newLength < 0) {
-            throw new Error("newLength < 0");
-        }
-        return { span: span, newLength: newLength };
-    }
-    ts.createTextChangeRange = createTextChangeRange;
-    ts.unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
-    /**
-     * Called to merge all the changes that occurred across several versions of a script snapshot
-     * into a single change.  i.e. if a user keeps making successive edits to a script we will
-     * have a text change from V1 to V2, V2 to V3, ..., Vn.
-     *
-     * This function will then merge those changes into a single change range valid between V1 and
-     * Vn.
-     */
-    function collapseTextChangeRangesAcrossMultipleVersions(changes) {
-        if (changes.length === 0) {
-            return ts.unchangedTextChangeRange;
-        }
-        if (changes.length === 1) {
-            return changes[0];
-        }
-        // We change from talking about { { oldStart, oldLength }, newLength } to { oldStart, oldEnd, newEnd }
-        // as it makes things much easier to reason about.
-        var change0 = changes[0];
-        var oldStartN = change0.span.start;
-        var oldEndN = textSpanEnd(change0.span);
-        var newEndN = oldStartN + change0.newLength;
-        for (var i = 1; i < changes.length; i++) {
-            var nextChange = changes[i];
-            // Consider the following case:
-            // i.e. two edits.  The first represents the text change range { { 10, 50 }, 30 }.  i.e. The span starting
-            // at 10, with length 50 is reduced to length 30.  The second represents the text change range { { 30, 30 }, 40 }.
-            // i.e. the span starting at 30 with length 30 is increased to length 40.
-            //
-            //      0         10        20        30        40        50        60        70        80        90        100
-            //      -------------------------------------------------------------------------------------------------------
-            //                |                                                 /
-            //                |                                            /----
-            //  T1            |                                       /----
-            //                |                                  /----
-            //                |                             /----
-            //      -------------------------------------------------------------------------------------------------------
-            //                                     |                            \
-            //                                     |                               \
-            //   T2                                |                                 \
-            //                                     |                                   \
-            //                                     |                                      \
-            //      -------------------------------------------------------------------------------------------------------
-            //
-            // Merging these turns out to not be too difficult.  First, determining the new start of the change is trivial
-            // it's just the min of the old and new starts.  i.e.:
-            //
-            //      0         10        20        30        40        50        60        70        80        90        100
-            //      ------------------------------------------------------------*------------------------------------------
-            //                |                                                 /
-            //                |                                            /----
-            //  T1            |                                       /----
-            //                |                                  /----
-            //                |                             /----
-            //      ----------------------------------------$-------------------$------------------------------------------
-            //                .                    |                            \
-            //                .                    |                               \
-            //   T2           .                    |                                 \
-            //                .                    |                                   \
-            //                .                    |                                      \
-            //      ----------------------------------------------------------------------*--------------------------------
-            //
-            // (Note the dots represent the newly inferred start.
-            // Determining the new and old end is also pretty simple.  Basically it boils down to paying attention to the
-            // absolute positions at the asterisks, and the relative change between the dollar signs. Basically, we see
-            // which if the two $'s precedes the other, and we move that one forward until they line up.  in this case that
-            // means:
-            //
-            //      0         10        20        30        40        50        60        70        80        90        100
-            //      --------------------------------------------------------------------------------*----------------------
-            //                |                                                                     /
-            //                |                                                                /----
-            //  T1            |                                                           /----
-            //                |                                                      /----
-            //                |                                                 /----
-            //      ------------------------------------------------------------$------------------------------------------
-            //                .                    |                            \
-            //                .                    |                               \
-            //   T2           .                    |                                 \
-            //                .                    |                                   \
-            //                .                    |                                      \
-            //      ----------------------------------------------------------------------*--------------------------------
-            //
-            // In other words (in this case), we're recognizing that the second edit happened after where the first edit
-            // ended with a delta of 20 characters (60 - 40).  Thus, if we go back in time to where the first edit started
-            // that's the same as if we started at char 80 instead of 60.
-            //
-            // As it so happens, the same logic applies if the second edit precedes the first edit.  In that case rather
-            // than pushing the first edit forward to match the second, we'll push the second edit forward to match the
-            // first.
-            //
-            // In this case that means we have { oldStart: 10, oldEnd: 80, newEnd: 70 } or, in TextChangeRange
-            // semantics: { { start: 10, length: 70 }, newLength: 60 }
-            //
-            // The math then works out as follows.
-            // If we have { oldStart1, oldEnd1, newEnd1 } and { oldStart2, oldEnd2, newEnd2 } then we can compute the
-            // final result like so:
-            //
-            // {
-            //      oldStart3: Min(oldStart1, oldStart2),
-            //      oldEnd3  : Max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1)),
-            //      newEnd3  : Max(newEnd2, newEnd2 + (newEnd1 - oldEnd2))
-            // }
-            var oldStart1 = oldStartN;
-            var oldEnd1 = oldEndN;
-            var newEnd1 = newEndN;
-            var oldStart2 = nextChange.span.start;
-            var oldEnd2 = textSpanEnd(nextChange.span);
-            var newEnd2 = oldStart2 + nextChange.newLength;
-            oldStartN = Math.min(oldStart1, oldStart2);
-            oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
-            newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
-        }
-        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), /*newLength:*/ newEndN - oldStartN);
-    }
-    ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
-    function getTypeParameterOwner(d) {
-        if (d && d.kind === 141 /* TypeParameter */) {
-            for (var current = d; current; current = current.parent) {
-                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 222 /* InterfaceDeclaration */) {
-                    return current;
-                }
-            }
-        }
-    }
-    ts.getTypeParameterOwner = getTypeParameterOwner;
-    function isParameterPropertyDeclaration(node) {
-        return node.flags & 92 /* ParameterPropertyModifier */ && node.parent.kind === 148 /* Constructor */ && ts.isClassLike(node.parent.parent);
-    }
-    ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
-    function startsWith(str, prefix) {
-        return str.lastIndexOf(prefix, 0) === 0;
-    }
-    ts.startsWith = startsWith;
-    function endsWith(str, suffix) {
-        var expectedPos = str.length - suffix.length;
-        return str.indexOf(suffix, expectedPos) === expectedPos;
-    }
-    ts.endsWith = endsWith;
-})(ts || (ts = {}));
-/// <reference path="utilities.ts"/>
-/// <reference path="scanner.ts"/>
-var ts;
-(function (ts) {
-    /* @internal */ ts.parseTime = 0;
-    var NodeConstructor;
-    var SourceFileConstructor;
-    function createNode(kind, pos, end) {
-        if (kind === 256 /* SourceFile */) {
-            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
-        }
-        else {
-            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
-        }
-    }
-    ts.createNode = createNode;
-    function visitNode(cbNode, node) {
-        if (node) {
-            return cbNode(node);
-        }
-    }
-    function visitNodeArray(cbNodes, nodes) {
-        if (nodes) {
-            return cbNodes(nodes);
-        }
-    }
-    function visitEachNode(cbNode, nodes) {
-        if (nodes) {
-            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
-                var node = nodes_1[_i];
-                var result = cbNode(node);
-                if (result) {
-                    return result;
-                }
-            }
-        }
-    }
-    // Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
-    // stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
-    // embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
-    // a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
-    function forEachChild(node, cbNode, cbNodeArray) {
-        if (!node) {
-            return;
-        }
-        // The visitXXX functions could be written as local functions that close over the cbNode and cbNodeArray
-        // callback parameters, but that causes a closure allocation for each invocation with noticeable effects
-        // on performance.
-        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
-        var cbNodes = cbNodeArray || cbNode;
-        switch (node.kind) {
-            case 139 /* QualifiedName */:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.right);
-            case 141 /* TypeParameter */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.constraint) ||
-                    visitNode(cbNode, node.expression);
-            case 254 /* ShorthandPropertyAssignment */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.equalsToken) ||
-                    visitNode(cbNode, node.objectAssignmentInitializer);
-            case 142 /* Parameter */:
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-            case 253 /* PropertyAssignment */:
-            case 218 /* VariableDeclaration */:
-            case 169 /* BindingElement */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.dotDotDotToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.initializer);
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
-            case 151 /* CallSignature */:
-            case 152 /* ConstructSignature */:
-            case 153 /* IndexSignature */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 179 /* FunctionExpression */:
-            case 220 /* FunctionDeclaration */:
-            case 180 /* ArrowFunction */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.equalsGreaterThanToken) ||
-                    visitNode(cbNode, node.body);
-            case 155 /* TypeReference */:
-                return visitNode(cbNode, node.typeName) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 154 /* TypePredicate */:
-                return visitNode(cbNode, node.parameterName) ||
-                    visitNode(cbNode, node.type);
-            case 158 /* TypeQuery */:
-                return visitNode(cbNode, node.exprName);
-            case 159 /* TypeLiteral */:
-                return visitNodes(cbNodes, node.members);
-            case 160 /* ArrayType */:
-                return visitNode(cbNode, node.elementType);
-            case 161 /* TupleType */:
-                return visitNodes(cbNodes, node.elementTypes);
-            case 162 /* UnionType */:
-            case 163 /* IntersectionType */:
-                return visitNodes(cbNodes, node.types);
-            case 164 /* ParenthesizedType */:
-                return visitNode(cbNode, node.type);
-            case 167 /* ObjectBindingPattern */:
-            case 168 /* ArrayBindingPattern */:
-                return visitNodes(cbNodes, node.elements);
-            case 170 /* ArrayLiteralExpression */:
-                return visitNodes(cbNodes, node.elements);
-            case 171 /* ObjectLiteralExpression */:
-                return visitNodes(cbNodes, node.properties);
-            case 172 /* PropertyAccessExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.dotToken) ||
-                    visitNode(cbNode, node.name);
-            case 173 /* ElementAccessExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.argumentExpression);
-            case 174 /* CallExpression */:
-            case 175 /* NewExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments) ||
-                    visitNodes(cbNodes, node.arguments);
-            case 176 /* TaggedTemplateExpression */:
-                return visitNode(cbNode, node.tag) ||
-                    visitNode(cbNode, node.template);
-            case 177 /* TypeAssertionExpression */:
-                return visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.expression);
-            case 178 /* ParenthesizedExpression */:
-                return visitNode(cbNode, node.expression);
-            case 181 /* DeleteExpression */:
-                return visitNode(cbNode, node.expression);
-            case 182 /* TypeOfExpression */:
-                return visitNode(cbNode, node.expression);
-            case 183 /* VoidExpression */:
-                return visitNode(cbNode, node.expression);
-            case 185 /* PrefixUnaryExpression */:
-                return visitNode(cbNode, node.operand);
-            case 190 /* YieldExpression */:
-                return visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.expression);
-            case 184 /* AwaitExpression */:
-                return visitNode(cbNode, node.expression);
-            case 186 /* PostfixUnaryExpression */:
-                return visitNode(cbNode, node.operand);
-            case 187 /* BinaryExpression */:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.operatorToken) ||
-                    visitNode(cbNode, node.right);
-            case 195 /* AsExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.type);
-            case 196 /* NonNullExpression */:
-                return visitNode(cbNode, node.expression);
-            case 188 /* ConditionalExpression */:
-                return visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.whenTrue) ||
-                    visitNode(cbNode, node.colonToken) ||
-                    visitNode(cbNode, node.whenFalse);
-            case 191 /* SpreadElementExpression */:
-                return visitNode(cbNode, node.expression);
-            case 199 /* Block */:
-            case 226 /* ModuleBlock */:
-                return visitNodes(cbNodes, node.statements);
-            case 256 /* SourceFile */:
-                return visitNodes(cbNodes, node.statements) ||
-                    visitNode(cbNode, node.endOfFileToken);
-            case 200 /* VariableStatement */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.declarationList);
-            case 219 /* VariableDeclarationList */:
-                return visitNodes(cbNodes, node.declarations);
-            case 202 /* ExpressionStatement */:
-                return visitNode(cbNode, node.expression);
-            case 203 /* IfStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.thenStatement) ||
-                    visitNode(cbNode, node.elseStatement);
-            case 204 /* DoStatement */:
-                return visitNode(cbNode, node.statement) ||
-                    visitNode(cbNode, node.expression);
-            case 205 /* WhileStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 206 /* ForStatement */:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.incrementor) ||
-                    visitNode(cbNode, node.statement);
-            case 207 /* ForInStatement */:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 208 /* ForOfStatement */:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 209 /* ContinueStatement */:
-            case 210 /* BreakStatement */:
-                return visitNode(cbNode, node.label);
-            case 211 /* ReturnStatement */:
-                return visitNode(cbNode, node.expression);
-            case 212 /* WithStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 213 /* SwitchStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.caseBlock);
-            case 227 /* CaseBlock */:
-                return visitNodes(cbNodes, node.clauses);
-            case 249 /* CaseClause */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.statements);
-            case 250 /* DefaultClause */:
-                return visitNodes(cbNodes, node.statements);
-            case 214 /* LabeledStatement */:
-                return visitNode(cbNode, node.label) ||
-                    visitNode(cbNode, node.statement);
-            case 215 /* ThrowStatement */:
-                return visitNode(cbNode, node.expression);
-            case 216 /* TryStatement */:
-                return visitNode(cbNode, node.tryBlock) ||
-                    visitNode(cbNode, node.catchClause) ||
-                    visitNode(cbNode, node.finallyBlock);
-            case 252 /* CatchClause */:
-                return visitNode(cbNode, node.variableDeclaration) ||
-                    visitNode(cbNode, node.block);
-            case 143 /* Decorator */:
-                return visitNode(cbNode, node.expression);
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 222 /* InterfaceDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 223 /* TypeAliasDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNode(cbNode, node.type);
-            case 224 /* EnumDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.members);
-            case 255 /* EnumMember */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 225 /* ModuleDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.body);
-            case 229 /* ImportEqualsDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.moduleReference);
-            case 230 /* ImportDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.importClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 231 /* ImportClause */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.namedBindings);
-            case 228 /* NamespaceExportDeclaration */:
-                return visitNode(cbNode, node.name);
-            case 232 /* NamespaceImport */:
-                return visitNode(cbNode, node.name);
-            case 233 /* NamedImports */:
-            case 237 /* NamedExports */:
-                return visitNodes(cbNodes, node.elements);
-            case 236 /* ExportDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.exportClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 234 /* ImportSpecifier */:
-            case 238 /* ExportSpecifier */:
-                return visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.name);
-            case 235 /* ExportAssignment */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.expression);
-            case 189 /* TemplateExpression */:
-                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
-            case 197 /* TemplateSpan */:
-                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
-            case 140 /* ComputedPropertyName */:
-                return visitNode(cbNode, node.expression);
-            case 251 /* HeritageClause */:
-                return visitNodes(cbNodes, node.types);
-            case 194 /* ExpressionWithTypeArguments */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 240 /* ExternalModuleReference */:
-                return visitNode(cbNode, node.expression);
-            case 239 /* MissingDeclaration */:
-                return visitNodes(cbNodes, node.decorators);
-            case 241 /* JsxElement */:
-                return visitNode(cbNode, node.openingElement) ||
-                    visitNodes(cbNodes, node.children) ||
-                    visitNode(cbNode, node.closingElement);
-            case 242 /* JsxSelfClosingElement */:
-            case 243 /* JsxOpeningElement */:
-                return visitNode(cbNode, node.tagName) ||
-                    visitNodes(cbNodes, node.attributes);
-            case 246 /* JsxAttribute */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 247 /* JsxSpreadAttribute */:
-                return visitNode(cbNode, node.expression);
-            case 248 /* JsxExpression */:
-                return visitNode(cbNode, node.expression);
-            case 245 /* JsxClosingElement */:
-                return visitNode(cbNode, node.tagName);
-            case 257 /* JSDocTypeExpression */:
-                return visitNode(cbNode, node.type);
-            case 261 /* JSDocUnionType */:
-                return visitNodes(cbNodes, node.types);
-            case 262 /* JSDocTupleType */:
-                return visitNodes(cbNodes, node.types);
-            case 260 /* JSDocArrayType */:
-                return visitNode(cbNode, node.elementType);
-            case 264 /* JSDocNonNullableType */:
-                return visitNode(cbNode, node.type);
-            case 263 /* JSDocNullableType */:
-                return visitNode(cbNode, node.type);
-            case 265 /* JSDocRecordType */:
-                return visitNodes(cbNodes, node.members);
-            case 267 /* JSDocTypeReference */:
-                return visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 268 /* JSDocOptionalType */:
-                return visitNode(cbNode, node.type);
-            case 269 /* JSDocFunctionType */:
-                return visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 270 /* JSDocVariadicType */:
-                return visitNode(cbNode, node.type);
-            case 271 /* JSDocConstructorType */:
-                return visitNode(cbNode, node.type);
-            case 272 /* JSDocThisType */:
-                return visitNode(cbNode, node.type);
-            case 266 /* JSDocRecordMember */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.type);
-            case 273 /* JSDocComment */:
-                return visitNodes(cbNodes, node.tags);
-            case 275 /* JSDocParameterTag */:
-                return visitNode(cbNode, node.preParameterName) ||
-                    visitNode(cbNode, node.typeExpression) ||
-                    visitNode(cbNode, node.postParameterName);
-            case 276 /* JSDocReturnTag */:
-                return visitNode(cbNode, node.typeExpression);
-            case 277 /* JSDocTypeTag */:
-                return visitNode(cbNode, node.typeExpression);
-            case 278 /* JSDocTemplateTag */:
-                return visitNodes(cbNodes, node.typeParameters);
-        }
-    }
-    ts.forEachChild = forEachChild;
-    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
-        if (setParentNodes === void 0) { setParentNodes = false; }
-        var start = new Date().getTime();
-        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, /*syntaxCursor*/ undefined, setParentNodes, scriptKind);
-        ts.parseTime += new Date().getTime() - start;
-        return result;
-    }
-    ts.createSourceFile = createSourceFile;
-    function isExternalModule(file) {
-        return file.externalModuleIndicator !== undefined;
-    }
-    ts.isExternalModule = isExternalModule;
-    // Produces a new SourceFile for the 'newText' provided. The 'textChangeRange' parameter
-    // indicates what changed between the 'text' that this SourceFile has and the 'newText'.
-    // The SourceFile will be created with the compiler attempting to reuse as many nodes from
-    // this file as possible.
-    //
-    // Note: this function mutates nodes from this SourceFile. That means any existing nodes
-    // from this SourceFile that are being held onto may change as a result (including
-    // becoming detached from any SourceFile).  It is recommended that this SourceFile not
-    // be used once 'update' is called on it.
-    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-        return IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
-    }
-    ts.updateSourceFile = updateSourceFile;
-    /* @internal */
-    function parseIsolatedJSDocComment(content, start, length) {
-        return Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
-    }
-    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-    /* @internal */
-    // Exposed only for testing.
-    function parseJSDocTypeExpressionForTests(content, start, length) {
-        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
-    }
-    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-    // Implement the parser as a singleton module.  We do this for perf reasons because creating
-    // parser instances can actually be expensive enough to impact us on projects with many source
-    // files.
-    var Parser;
-    (function (Parser) {
-        // Share a single scanner across all calls to parse a source file.  This helps speed things
-        // up by avoiding the cost of creating/compiling scanners over and over again.
-        var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ true);
-        var disallowInAndDecoratorContext = 4194304 /* DisallowInContext */ | 16777216 /* DecoratorContext */;
-        // capture constructors in 'initializeState' to avoid null checks
-        var NodeConstructor;
-        var SourceFileConstructor;
-        var sourceFile;
-        var parseDiagnostics;
-        var syntaxCursor;
-        var token;
-        var sourceText;
-        var nodeCount;
-        var identifiers;
-        var identifierCount;
-        var parsingContext;
-        // Flags that dictate what parsing context we're in.  For example:
-        // Whether or not we are in strict parsing mode.  All that changes in strict parsing mode is
-        // that some tokens that would be considered identifiers may be considered keywords.
-        //
-        // When adding more parser context flags, consider which is the more common case that the
-        // flag will be in.  This should be the 'false' state for that flag.  The reason for this is
-        // that we don't store data in our nodes unless the value is in the *non-default* state.  So,
-        // for example, more often than code 'allows-in' (or doesn't 'disallow-in').  We opt for
-        // 'disallow-in' set to 'false'.  Otherwise, if we had 'allowsIn' set to 'true', then almost
-        // all nodes would need extra state on them to store this info.
-        //
-        // Note:  'allowIn' and 'allowYield' track 1:1 with the [in] and [yield] concepts in the ES6
-        // grammar specification.
-        //
-        // An important thing about these context concepts.  By default they are effectively inherited
-        // while parsing through every grammar production.  i.e. if you don't change them, then when
-        // you parse a sub-production, it will have the same context values as the parent production.
-        // This is great most of the time.  After all, consider all the 'expression' grammar productions
-        // and how nearly all of them pass along the 'in' and 'yield' context values:
-        //
-        // EqualityExpression[In, Yield] :
-        //      RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] == RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] != RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] === RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] !== RelationalExpression[?In, ?Yield]
-        //
-        // Where you have to be careful is then understanding what the points are in the grammar
-        // where the values are *not* passed along.  For example:
-        //
-        // SingleNameBinding[Yield,GeneratorParameter]
-        //      [+GeneratorParameter]BindingIdentifier[Yield] Initializer[In]opt
-        //      [~GeneratorParameter]BindingIdentifier[?Yield]Initializer[In, ?Yield]opt
-        //
-        // Here this is saying that if the GeneratorParameter context flag is set, that we should
-        // explicitly set the 'yield' context flag to false before calling into the BindingIdentifier
-        // and we should explicitly unset the 'yield' context flag before calling into the Initializer.
-        // production.  Conversely, if the GeneratorParameter context flag is not set, then we
-        // should leave the 'yield' context flag alone.
-        //
-        // Getting this all correct is tricky and requires careful reading of the grammar to
-        // understand when these values should be changed versus when they should be inherited.
-        //
-        // Note: it should not be necessary to save/restore these flags during speculative/lookahead
-        // parsing.  These context flags are naturally stored and restored through normal recursive
-        // descent parsing and unwinding.
-        var contextFlags;
-        // Whether or not we've had a parse error since creating the last AST node.  If we have
-        // encountered an error, it will be stored on the next AST node we create.  Parse errors
-        // can be broken down into three categories:
-        //
-        // 1) An error that occurred during scanning.  For example, an unterminated literal, or a
-        //    character that was completely not understood.
-        //
-        // 2) A token was expected, but was not present.  This type of error is commonly produced
-        //    by the 'parseExpected' function.
-        //
-        // 3) A token was present that no parsing function was able to consume.  This type of error
-        //    only occurs in the 'abortParsingListOrMoveToNextToken' function when the parser
-        //    decides to skip the token.
-        //
-        // In all of these cases, we want to mark the next node as having had an error before it.
-        // With this mark, we can know in incremental settings if this node can be reused, or if
-        // we have to reparse it.  If we don't keep this information around, we may just reuse the
-        // node.  in that event we would then not produce the same errors as we did before, causing
-        // significant confusion problems.
-        //
-        // Note: it is necessary that this value be saved/restored during speculative/lookahead
-        // parsing.  During lookahead parsing, we will often create a node.  That node will have
-        // this value attached, and then this value will be set back to 'false'.  If we decide to
-        // rewind, we must get back to the same value we had prior to the lookahead.
-        //
-        // Note: any errors at the end of the file that do not precede a regular node, should get
-        // attached to the EOF token.
-        var parseErrorBeforeNextFinishedNode = false;
-        function parseSourceFile(fileName, _sourceText, languageVersion, _syntaxCursor, setParentNodes, scriptKind) {
-            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
-            initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind);
-            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
-            clearState();
-            return result;
-        }
-        Parser.parseSourceFile = parseSourceFile;
-        function getLanguageVariant(scriptKind) {
-            // .tsx and .jsx files are treated as jsx language variant.
-            return scriptKind === 4 /* TSX */ || scriptKind === 2 /* JSX */ || scriptKind === 1 /* JS */ ? 1 /* JSX */ : 0 /* Standard */;
-        }
-        function initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind) {
-            NodeConstructor = ts.objectAllocator.getNodeConstructor();
-            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
-            sourceText = _sourceText;
-            syntaxCursor = _syntaxCursor;
-            parseDiagnostics = [];
-            parsingContext = 0;
-            identifiers = {};
-            identifierCount = 0;
-            nodeCount = 0;
-            contextFlags = scriptKind === 1 /* JS */ || scriptKind === 2 /* JSX */ ? 134217728 /* JavaScriptFile */ : 0 /* None */;
-            parseErrorBeforeNextFinishedNode = false;
-            // Initialize and prime the scanner before parsing the source elements.
-            scanner.setText(sourceText);
-            scanner.setOnError(scanError);
-            scanner.setScriptTarget(languageVersion);
-            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
-        }
-        function clearState() {
-            // Clear out the text the scanner is pointing at, so it doesn't keep anything alive unnecessarily.
-            scanner.setText("");
-            scanner.setOnError(undefined);
-            // Clear any data.  We don't want to accidentally hold onto it for too long.
-            parseDiagnostics = undefined;
-            sourceFile = undefined;
-            identifiers = undefined;
-            syntaxCursor = undefined;
-            sourceText = undefined;
-        }
-        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
-            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
-            sourceFile.flags = contextFlags;
-            // Prime the scanner.
-            token = nextToken();
-            processReferenceComments(sourceFile);
-            sourceFile.statements = parseList(0 /* SourceElements */, parseStatement);
-            ts.Debug.assert(token === 1 /* EndOfFileToken */);
-            sourceFile.endOfFileToken = parseTokenNode();
-            setExternalModuleIndicator(sourceFile);
-            sourceFile.nodeCount = nodeCount;
-            sourceFile.identifierCount = identifierCount;
-            sourceFile.identifiers = identifiers;
-            sourceFile.parseDiagnostics = parseDiagnostics;
-            if (setParentNodes) {
-                fixupParentReferences(sourceFile);
-            }
-            return sourceFile;
-        }
-        function addJSDocComment(node) {
-            if (contextFlags & 134217728 /* JavaScriptFile */) {
-                var comments = ts.getLeadingCommentRangesOfNode(node, sourceFile);
-                if (comments) {
-                    for (var _i = 0, comments_1 = comments; _i < comments_1.length; _i++) {
-                        var comment = comments_1[_i];
-                        var jsDocComment = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
-                        if (jsDocComment) {
-                            node.jsDocComment = jsDocComment;
-                        }
-                    }
-                }
-            }
-            return node;
-        }
-        function fixupParentReferences(sourceFile) {
-            // normally parent references are set during binding. However, for clients that only need
-            // a syntax tree, and no semantic features, then the binding process is an unnecessary
-            // overhead.  This functions allows us to set all the parents, without all the expense of
-            // binding.
-            var parent = sourceFile;
-            forEachChild(sourceFile, visitNode);
-            return;
-            function visitNode(n) {
-                // walk down setting parents that differ from the parent we think it should be.  This
-                // allows us to quickly bail out of setting parents for subtrees during incremental
-                // parsing
-                if (n.parent !== parent) {
-                    n.parent = parent;
-                    var saveParent = parent;
-                    parent = n;
-                    forEachChild(n, visitNode);
-                    parent = saveParent;
-                }
-            }
-        }
-        Parser.fixupParentReferences = fixupParentReferences;
-        function createSourceFile(fileName, languageVersion, scriptKind) {
-            // code from createNode is inlined here so createNode won't have to deal with special case of creating source files
-            // this is quite rare comparing to other nodes and createNode should be as fast as possible
-            var sourceFile = new SourceFileConstructor(256 /* SourceFile */, /*pos*/ 0, /* end */ sourceText.length);
-            nodeCount++;
-            sourceFile.text = sourceText;
-            sourceFile.bindDiagnostics = [];
-            sourceFile.languageVersion = languageVersion;
-            sourceFile.fileName = ts.normalizePath(fileName);
-            sourceFile.languageVariant = getLanguageVariant(scriptKind);
-            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts");
-            sourceFile.scriptKind = scriptKind;
-            return sourceFile;
-        }
-        function setContextFlag(val, flag) {
-            if (val) {
-                contextFlags |= flag;
-            }
-            else {
-                contextFlags &= ~flag;
-            }
-        }
-        function setDisallowInContext(val) {
-            setContextFlag(val, 4194304 /* DisallowInContext */);
-        }
-        function setYieldContext(val) {
-            setContextFlag(val, 8388608 /* YieldContext */);
-        }
-        function setDecoratorContext(val) {
-            setContextFlag(val, 16777216 /* DecoratorContext */);
-        }
-        function setAwaitContext(val) {
-            setContextFlag(val, 33554432 /* AwaitContext */);
-        }
-        function doOutsideOfContext(context, func) {
-            // contextFlagsToClear will contain only the context flags that are
-            // currently set that we need to temporarily clear
-            // We don't just blindly reset to the previous flags to ensure
-            // that we do not mutate cached flags for the incremental
-            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
-            // HasAggregatedChildData).
-            var contextFlagsToClear = context & contextFlags;
-            if (contextFlagsToClear) {
-                // clear the requested context flags
-                setContextFlag(/*val*/ false, contextFlagsToClear);
-                var result = func();
-                // restore the context flags we just cleared
-                setContextFlag(/*val*/ true, contextFlagsToClear);
-                return result;
-            }
-            // no need to do anything special as we are not in any of the requested contexts
-            return func();
-        }
-        function doInsideOfContext(context, func) {
-            // contextFlagsToSet will contain only the context flags that
-            // are not currently set that we need to temporarily enable.
-            // We don't just blindly reset to the previous flags to ensure
-            // that we do not mutate cached flags for the incremental
-            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
-            // HasAggregatedChildData).
-            var contextFlagsToSet = context & ~contextFlags;
-            if (contextFlagsToSet) {
-                // set the requested context flags
-                setContextFlag(/*val*/ true, contextFlagsToSet);
-                var result = func();
-                // reset the context flags we just set
-                setContextFlag(/*val*/ false, contextFlagsToSet);
-                return result;
-            }
-            // no need to do anything special as we are already in all of the requested contexts
-            return func();
-        }
-        function allowInAnd(func) {
-            return doOutsideOfContext(4194304 /* DisallowInContext */, func);
-        }
-        function disallowInAnd(func) {
-            return doInsideOfContext(4194304 /* DisallowInContext */, func);
-        }
-        function doInYieldContext(func) {
-            return doInsideOfContext(8388608 /* YieldContext */, func);
-        }
-        function doInDecoratorContext(func) {
-            return doInsideOfContext(16777216 /* DecoratorContext */, func);
-        }
-        function doInAwaitContext(func) {
-            return doInsideOfContext(33554432 /* AwaitContext */, func);
-        }
-        function doOutsideOfAwaitContext(func) {
-            return doOutsideOfContext(33554432 /* AwaitContext */, func);
-        }
-        function doInYieldAndAwaitContext(func) {
-            return doInsideOfContext(8388608 /* YieldContext */ | 33554432 /* AwaitContext */, func);
-        }
-        function inContext(flags) {
-            return (contextFlags & flags) !== 0;
-        }
-        function inYieldContext() {
-            return inContext(8388608 /* YieldContext */);
-        }
-        function inDisallowInContext() {
-            return inContext(4194304 /* DisallowInContext */);
-        }
-        function inDecoratorContext() {
-            return inContext(16777216 /* DecoratorContext */);
-        }
-        function inAwaitContext() {
-            return inContext(33554432 /* AwaitContext */);
-        }
-        function parseErrorAtCurrentToken(message, arg0) {
-            var start = scanner.getTokenPos();
-            var length = scanner.getTextPos() - start;
-            parseErrorAtPosition(start, length, message, arg0);
-        }
-        function parseErrorAtPosition(start, length, message, arg0) {
-            // Don't report another error if it would just be at the same position as the last error.
-            var lastError = ts.lastOrUndefined(parseDiagnostics);
-            if (!lastError || start !== lastError.start) {
-                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
-            }
-            // Mark that we've encountered an error.  We'll set an appropriate bit on the next
-            // node we finish so that it can't be reused incrementally.
-            parseErrorBeforeNextFinishedNode = true;
-        }
-        function scanError(message, length) {
-            var pos = scanner.getTextPos();
-            parseErrorAtPosition(pos, length || 0, message);
-        }
-        function getNodePos() {
-            return scanner.getStartPos();
-        }
-        function getNodeEnd() {
-            return scanner.getStartPos();
-        }
-        function nextToken() {
-            return token = scanner.scan();
-        }
-        function reScanGreaterToken() {
-            return token = scanner.reScanGreaterToken();
-        }
-        function reScanSlashToken() {
-            return token = scanner.reScanSlashToken();
-        }
-        function reScanTemplateToken() {
-            return token = scanner.reScanTemplateToken();
-        }
-        function scanJsxIdentifier() {
-            return token = scanner.scanJsxIdentifier();
-        }
-        function scanJsxText() {
-            return token = scanner.scanJsxToken();
-        }
-        function speculationHelper(callback, isLookAhead) {
-            // Keep track of the state we'll need to rollback to if lookahead fails (or if the
-            // caller asked us to always reset our state).
-            var saveToken = token;
-            var saveParseDiagnosticsLength = parseDiagnostics.length;
-            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-            // Note: it is not actually necessary to save/restore the context flags here.  That's
-            // because the saving/restoring of these flags happens naturally through the recursive
-            // descent nature of our parser.  However, we still store this here just so we can
-            // assert that that invariant holds.
-            var saveContextFlags = contextFlags;
-            // If we're only looking ahead, then tell the scanner to only lookahead as well.
-            // Otherwise, if we're actually speculatively parsing, then tell the scanner to do the
-            // same.
-            var result = isLookAhead
-                ? scanner.lookAhead(callback)
-                : scanner.tryScan(callback);
-            ts.Debug.assert(saveContextFlags === contextFlags);
-            // If our callback returned something 'falsy' or we're just looking ahead,
-            // then unconditionally restore us to where we were.
-            if (!result || isLookAhead) {
-                token = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-            }
-            return result;
-        }
-        /** Invokes the provided callback then unconditionally restores the parser to the state it
-         * was in immediately prior to invoking the callback.  The result of invoking the callback
-         * is returned from this function.
-         */
-        function lookAhead(callback) {
-            return speculationHelper(callback, /*isLookAhead*/ true);
-        }
-        /** Invokes the provided callback.  If the callback returns something falsy, then it restores
-         * the parser to the state it was in immediately prior to invoking the callback.  If the
-         * callback returns something truthy, then the parser state is not rolled back.  The result
-         * of invoking the callback is returned from this function.
-         */
-        function tryParse(callback) {
-            return speculationHelper(callback, /*isLookAhead*/ false);
-        }
-        // Ignore strict mode flag because we will report an error in type checker instead.
-        function isIdentifier() {
-            if (token === 69 /* Identifier */) {
-                return true;
-            }
-            // If we have a 'yield' keyword, and we're in the [yield] context, then 'yield' is
-            // considered a keyword and is not an identifier.
-            if (token === 114 /* YieldKeyword */ && inYieldContext()) {
-                return false;
-            }
-            // If we have a 'await' keyword, and we're in the [Await] context, then 'await' is
-            // considered a keyword and is not an identifier.
-            if (token === 119 /* AwaitKeyword */ && inAwaitContext()) {
-                return false;
-            }
-            return token > 105 /* LastReservedWord */;
-        }
-        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
-            if (shouldAdvance === void 0) { shouldAdvance = true; }
-            if (token === kind) {
-                if (shouldAdvance) {
-                    nextToken();
-                }
-                return true;
-            }
-            // Report specific message if provided with one.  Otherwise, report generic fallback message.
-            if (diagnosticMessage) {
-                parseErrorAtCurrentToken(diagnosticMessage);
-            }
-            else {
-                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
-            }
-            return false;
-        }
-        function parseOptional(t) {
-            if (token === t) {
-                nextToken();
-                return true;
-            }
-            return false;
-        }
-        function parseOptionalToken(t) {
-            if (token === t) {
-                return parseTokenNode();
-            }
-            return undefined;
-        }
-        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            return parseOptionalToken(t) ||
-                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
-        }
-        function parseTokenNode() {
-            var node = createNode(token);
-            nextToken();
-            return finishNode(node);
-        }
-        function canParseSemicolon() {
-            // If there's a real semicolon, then we can always parse it out.
-            if (token === 23 /* SemicolonToken */) {
-                return true;
-            }
-            // We can parse out an optional semicolon in ASI cases in the following cases.
-            return token === 16 /* CloseBraceToken */ || token === 1 /* EndOfFileToken */ || scanner.hasPrecedingLineBreak();
-        }
-        function parseSemicolon() {
-            if (canParseSemicolon()) {
-                if (token === 23 /* SemicolonToken */) {
-                    // consume the semicolon if it was explicitly provided.
-                    nextToken();
-                }
-                return true;
-            }
-            else {
-                return parseExpected(23 /* SemicolonToken */);
-            }
-        }
-        // note: this function creates only node
-        function createNode(kind, pos) {
-            nodeCount++;
-            if (!(pos >= 0)) {
-                pos = scanner.getStartPos();
-            }
-            return new NodeConstructor(kind, pos, pos);
-        }
-        function finishNode(node, end) {
-            node.end = end === undefined ? scanner.getStartPos() : end;
-            if (contextFlags) {
-                node.flags |= contextFlags;
-            }
-            // Keep track on the node if we encountered an error while parsing it.  If we did, then
-            // we cannot reuse the node incrementally.  Once we've marked this node, clear out the
-            // flag so that we don't mark any subsequent nodes.
-            if (parseErrorBeforeNextFinishedNode) {
-                parseErrorBeforeNextFinishedNode = false;
-                node.flags |= 67108864 /* ThisNodeHasError */;
-            }
-            return node;
-        }
-        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            if (reportAtCurrentPosition) {
-                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
-            }
-            else {
-                parseErrorAtCurrentToken(diagnosticMessage, arg0);
-            }
-            var result = createNode(kind, scanner.getStartPos());
-            result.text = "";
-            return finishNode(result);
-        }
-        function internIdentifier(text) {
-            text = ts.escapeIdentifier(text);
-            return ts.hasProperty(identifiers, text) ? identifiers[text] : (identifiers[text] = text);
-        }
-        // An identifier that starts with two underscores has an extra underscore character prepended to it to avoid issues
-        // with magic property names like '__proto__'. The 'identifiers' object is used to share a single string instance for
-        // each identifier in order to reduce memory consumption.
-        function createIdentifier(isIdentifier, diagnosticMessage) {
-            identifierCount++;
-            if (isIdentifier) {
-                var node = createNode(69 /* Identifier */);
-                // Store original token kind if it is not just an Identifier so we can report appropriate error later in type checker
-                if (token !== 69 /* Identifier */) {
-                    node.originalKeywordKind = token;
-                }
-                node.text = internIdentifier(scanner.getTokenValue());
-                nextToken();
-                return finishNode(node);
-            }
-            return createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
-        }
-        function parseIdentifier(diagnosticMessage) {
-            return createIdentifier(isIdentifier(), diagnosticMessage);
-        }
-        function parseIdentifierName() {
-            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token));
-        }
-        function isLiteralPropertyName() {
-            return ts.tokenIsIdentifierOrKeyword(token) ||
-                token === 9 /* StringLiteral */ ||
-                token === 8 /* NumericLiteral */;
-        }
-        function parsePropertyNameWorker(allowComputedPropertyNames) {
-            if (token === 9 /* StringLiteral */ || token === 8 /* NumericLiteral */) {
-                return parseLiteralNode(/*internName*/ true);
-            }
-            if (allowComputedPropertyNames && token === 19 /* OpenBracketToken */) {
-                return parseComputedPropertyName();
-            }
-            return parseIdentifierName();
-        }
-        function parsePropertyName() {
-            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ true);
-        }
-        function parseSimplePropertyName() {
-            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ false);
-        }
-        function isSimplePropertyName() {
-            return token === 9 /* StringLiteral */ || token === 8 /* NumericLiteral */ || ts.tokenIsIdentifierOrKeyword(token);
-        }
-        function parseComputedPropertyName() {
-            // PropertyName [Yield]:
-            //      LiteralPropertyName
-            //      ComputedPropertyName[?Yield]
-            var node = createNode(140 /* ComputedPropertyName */);
-            parseExpected(19 /* OpenBracketToken */);
-            // We parse any expression (including a comma expression). But the grammar
-            // says that only an assignment expression is allowed, so the grammar checker
-            // will error if it sees a comma expression.
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(20 /* CloseBracketToken */);
-            return finishNode(node);
-        }
-        function parseContextualModifier(t) {
-            return token === t && tryParse(nextTokenCanFollowModifier);
-        }
-        function nextTokenIsOnSameLineAndCanFollowModifier() {
-            nextToken();
-            if (scanner.hasPrecedingLineBreak()) {
-                return false;
-            }
-            return canFollowModifier();
-        }
-        function nextTokenCanFollowModifier() {
-            if (token === 74 /* ConstKeyword */) {
-                // 'const' is only a modifier if followed by 'enum'.
-                return nextToken() === 81 /* EnumKeyword */;
-            }
-            if (token === 82 /* ExportKeyword */) {
-                nextToken();
-                if (token === 77 /* DefaultKeyword */) {
-                    return lookAhead(nextTokenIsClassOrFunction);
-                }
-                return token !== 37 /* AsteriskToken */ && token !== 116 /* AsKeyword */ && token !== 15 /* OpenBraceToken */ && canFollowModifier();
-            }
-            if (token === 77 /* DefaultKeyword */) {
-                return nextTokenIsClassOrFunction();
-            }
-            if (token === 113 /* StaticKeyword */) {
-                nextToken();
-                return canFollowModifier();
-            }
-            return nextTokenIsOnSameLineAndCanFollowModifier();
-        }
-        function parseAnyContextualModifier() {
-            return ts.isModifierKind(token) && tryParse(nextTokenCanFollowModifier);
-        }
-        function canFollowModifier() {
-            return token === 19 /* OpenBracketToken */
-                || token === 15 /* OpenBraceToken */
-                || token === 37 /* AsteriskToken */
-                || isLiteralPropertyName();
-        }
-        function nextTokenIsClassOrFunction() {
-            nextToken();
-            return token === 73 /* ClassKeyword */ || token === 87 /* FunctionKeyword */;
-        }
-        // True if positioned at the start of a list element
-        function isListElement(parsingContext, inErrorRecovery) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return true;
-            }
-            switch (parsingContext) {
-                case 0 /* SourceElements */:
-                case 1 /* BlockStatements */:
-                case 3 /* SwitchClauseStatements */:
-                    // If we're in error recovery, then we don't want to treat ';' as an empty statement.
-                    // The problem is that ';' can show up in far too many contexts, and if we see one
-                    // and assume it's a statement, then we may bail out inappropriately from whatever
-                    // we're parsing.  For example, if we have a semicolon in the middle of a class, then
-                    // we really don't want to assume the class is over and we're on a statement in the
-                    // outer module.  We just want to consume and move on.
-                    return !(token === 23 /* SemicolonToken */ && inErrorRecovery) && isStartOfStatement();
-                case 2 /* SwitchClauses */:
-                    return token === 71 /* CaseKeyword */ || token === 77 /* DefaultKeyword */;
-                case 4 /* TypeMembers */:
-                    return lookAhead(isTypeMemberStart);
-                case 5 /* ClassMembers */:
-                    // We allow semicolons as class elements (as specified by ES6) as long as we're
-                    // not in error recovery.  If we're in error recovery, we don't want an errant
-                    // semicolon to be treated as a class member (since they're almost always used
-                    // for statements.
-                    return lookAhead(isClassMemberStart) || (token === 23 /* SemicolonToken */ && !inErrorRecovery);
-                case 6 /* EnumMembers */:
-                    // Include open bracket computed properties. This technically also lets in indexers,
-                    // which would be a candidate for improved error reporting.
-                    return token === 19 /* OpenBracketToken */ || isLiteralPropertyName();
-                case 12 /* ObjectLiteralMembers */:
-                    return token === 19 /* OpenBracketToken */ || token === 37 /* AsteriskToken */ || isLiteralPropertyName();
-                case 9 /* ObjectBindingElements */:
-                    return token === 19 /* OpenBracketToken */ || isLiteralPropertyName();
-                case 7 /* HeritageClauseElement */:
-                    // If we see { } then only consume it as an expression if it is followed by , or {
-                    // That way we won't consume the body of a class in its heritage clause.
-                    if (token === 15 /* OpenBraceToken */) {
-                        return lookAhead(isValidHeritageClauseObjectLiteral);
-                    }
-                    if (!inErrorRecovery) {
-                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
-                    }
-                    else {
-                        // If we're in error recovery we tighten up what we're willing to match.
-                        // That way we don't treat something like "this" as a valid heritage clause
-                        // element during recovery.
-                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
-                    }
-                case 8 /* VariableDeclarations */:
-                    return isIdentifierOrPattern();
-                case 10 /* ArrayBindingElements */:
-                    return token === 24 /* CommaToken */ || token === 22 /* DotDotDotToken */ || isIdentifierOrPattern();
-                case 17 /* TypeParameters */:
-                    return isIdentifier();
-                case 11 /* ArgumentExpressions */:
-                case 15 /* ArrayLiteralMembers */:
-                    return token === 24 /* CommaToken */ || token === 22 /* DotDotDotToken */ || isStartOfExpression();
-                case 16 /* Parameters */:
-                    return isStartOfParameter();
-                case 18 /* TypeArguments */:
-                case 19 /* TupleElementTypes */:
-                    return token === 24 /* CommaToken */ || isStartOfType();
-                case 20 /* HeritageClauses */:
-                    return isHeritageClause();
-                case 21 /* ImportOrExportSpecifiers */:
-                    return ts.tokenIsIdentifierOrKeyword(token);
-                case 13 /* JsxAttributes */:
-                    return ts.tokenIsIdentifierOrKeyword(token) || token === 15 /* OpenBraceToken */;
-                case 14 /* JsxChildren */:
-                    return true;
-                case 22 /* JSDocFunctionParameters */:
-                case 23 /* JSDocTypeArguments */:
-                case 25 /* JSDocTupleTypes */:
-                    return JSDocParser.isJSDocType();
-                case 24 /* JSDocRecordMembers */:
-                    return isSimplePropertyName();
-            }
-            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
-        }
-        function isValidHeritageClauseObjectLiteral() {
-            ts.Debug.assert(token === 15 /* OpenBraceToken */);
-            if (nextToken() === 16 /* CloseBraceToken */) {
-                // if we see  "extends {}" then only treat the {} as what we're extending (and not
-                // the class body) if we have:
-                //
-                //      extends {} {
-                //      extends {},
-                //      extends {} extends
-                //      extends {} implements
-                var next = nextToken();
-                return next === 24 /* CommaToken */ || next === 15 /* OpenBraceToken */ || next === 83 /* ExtendsKeyword */ || next === 106 /* ImplementsKeyword */;
-            }
-            return true;
-        }
-        function nextTokenIsIdentifier() {
-            nextToken();
-            return isIdentifier();
-        }
-        function nextTokenIsIdentifierOrKeyword() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token);
-        }
-        function isHeritageClauseExtendsOrImplementsKeyword() {
-            if (token === 106 /* ImplementsKeyword */ ||
-                token === 83 /* ExtendsKeyword */) {
-                return lookAhead(nextTokenIsStartOfExpression);
-            }
-            return false;
-        }
-        function nextTokenIsStartOfExpression() {
-            nextToken();
-            return isStartOfExpression();
-        }
-        // True if positioned at a list terminator
-        function isListTerminator(kind) {
-            if (token === 1 /* EndOfFileToken */) {
-                // Being at the end of the file ends all lists.
-                return true;
-            }
-            switch (kind) {
-                case 1 /* BlockStatements */:
-                case 2 /* SwitchClauses */:
-                case 4 /* TypeMembers */:
-                case 5 /* ClassMembers */:
-                case 6 /* EnumMembers */:
-                case 12 /* ObjectLiteralMembers */:
-                case 9 /* ObjectBindingElements */:
-                case 21 /* ImportOrExportSpecifiers */:
-                    return token === 16 /* CloseBraceToken */;
-                case 3 /* SwitchClauseStatements */:
-                    return token === 16 /* CloseBraceToken */ || token === 71 /* CaseKeyword */ || token === 77 /* DefaultKeyword */;
-                case 7 /* HeritageClauseElement */:
-                    return token === 15 /* OpenBraceToken */ || token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */;
-                case 8 /* VariableDeclarations */:
-                    return isVariableDeclaratorListTerminator();
-                case 17 /* TypeParameters */:
-                    // Tokens other than '>' are here for better error recovery
-                    return token === 27 /* GreaterThanToken */ || token === 17 /* OpenParenToken */ || token === 15 /* OpenBraceToken */ || token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */;
-                case 11 /* ArgumentExpressions */:
-                    // Tokens other than ')' are here for better error recovery
-                    return token === 18 /* CloseParenToken */ || token === 23 /* SemicolonToken */;
-                case 15 /* ArrayLiteralMembers */:
-                case 19 /* TupleElementTypes */:
-                case 10 /* ArrayBindingElements */:
-                    return token === 20 /* CloseBracketToken */;
-                case 16 /* Parameters */:
-                    // Tokens other than ')' and ']' (the latter for index signatures) are here for better error recovery
-                    return token === 18 /* CloseParenToken */ || token === 20 /* CloseBracketToken */ /*|| token === SyntaxKind.OpenBraceToken*/;
-                case 18 /* TypeArguments */:
-                    // Tokens other than '>' are here for better error recovery
-                    return token === 27 /* GreaterThanToken */ || token === 17 /* OpenParenToken */;
-                case 20 /* HeritageClauses */:
-                    return token === 15 /* OpenBraceToken */ || token === 16 /* CloseBraceToken */;
-                case 13 /* JsxAttributes */:
-                    return token === 27 /* GreaterThanToken */ || token === 39 /* SlashToken */;
-                case 14 /* JsxChildren */:
-                    return token === 25 /* LessThanToken */ && lookAhead(nextTokenIsSlash);
-                case 22 /* JSDocFunctionParameters */:
-                    return token === 18 /* CloseParenToken */ || token === 54 /* ColonToken */ || token === 16 /* CloseBraceToken */;
-                case 23 /* JSDocTypeArguments */:
-                    return token === 27 /* GreaterThanToken */ || token === 16 /* CloseBraceToken */;
-                case 25 /* JSDocTupleTypes */:
-                    return token === 20 /* CloseBracketToken */ || token === 16 /* CloseBraceToken */;
-                case 24 /* JSDocRecordMembers */:
-                    return token === 16 /* CloseBraceToken */;
-            }
-        }
-        function isVariableDeclaratorListTerminator() {
-            // If we can consume a semicolon (either explicitly, or with ASI), then consider us done
-            // with parsing the list of  variable declarators.
-            if (canParseSemicolon()) {
-                return true;
-            }
-            // in the case where we're parsing the variable declarator of a 'for-in' statement, we
-            // are done if we see an 'in' keyword in front of us. Same with for-of
-            if (isInOrOfKeyword(token)) {
-                return true;
-            }
-            // ERROR RECOVERY TWEAK:
-            // For better error recovery, if we see an '=>' then we just stop immediately.  We've got an
-            // arrow function here and it's going to be very unlikely that we'll resynchronize and get
-            // another variable declaration.
-            if (token === 34 /* EqualsGreaterThanToken */) {
-                return true;
-            }
-            // Keep trying to parse out variable declarators.
-            return false;
-        }
-        // True if positioned at element or terminator of the current list or any enclosing list
-        function isInSomeParsingContext() {
-            for (var kind = 0; kind < 26 /* Count */; kind++) {
-                if (parsingContext & (1 << kind)) {
-                    if (isListElement(kind, /*inErrorRecovery*/ true) || isListTerminator(kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        // Parses a list of elements
-        function parseList(kind, parseElement) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = [];
-            result.pos = getNodePos();
-            while (!isListTerminator(kind)) {
-                if (isListElement(kind, /*inErrorRecovery*/ false)) {
-                    var element = parseListElement(kind, parseElement);
-                    result.push(element);
-                    continue;
-                }
-                if (abortParsingListOrMoveToNextToken(kind)) {
-                    break;
-                }
-            }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function parseListElement(parsingContext, parseElement) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return consumeNode(node);
-            }
-            return parseElement();
-        }
-        function currentNode(parsingContext) {
-            // If there is an outstanding parse error that we've encountered, but not attached to
-            // some node, then we cannot get a node from the old source tree.  This is because we
-            // want to mark the next node we encounter as being unusable.
-            //
-            // Note: This may be too conservative.  Perhaps we could reuse the node and set the bit
-            // on it (or its leftmost child) as having the error.  For now though, being conservative
-            // is nice and likely won't ever affect perf.
-            if (parseErrorBeforeNextFinishedNode) {
-                return undefined;
-            }
-            if (!syntaxCursor) {
-                // if we don't have a cursor, we could never return a node from the old tree.
-                return undefined;
-            }
-            var node = syntaxCursor.currentNode(scanner.getStartPos());
-            // Can't reuse a missing node.
-            if (ts.nodeIsMissing(node)) {
-                return undefined;
-            }
-            // Can't reuse a node that intersected the change range.
-            if (node.intersectsChange) {
-                return undefined;
-            }
-            // Can't reuse a node that contains a parse error.  This is necessary so that we
-            // produce the same set of errors again.
-            if (ts.containsParseError(node)) {
-                return undefined;
-            }
-            // We can only reuse a node if it was parsed under the same strict mode that we're
-            // currently in.  i.e. if we originally parsed a node in non-strict mode, but then
-            // the user added 'using strict' at the top of the file, then we can't use that node
-            // again as the presence of strict mode may cause us to parse the tokens in the file
-            // differently.
-            //
-            // Note: we *can* reuse tokens when the strict mode changes.  That's because tokens
-            // are unaffected by strict mode.  It's just the parser will decide what to do with it
-            // differently depending on what mode it is in.
-            //
-            // This also applies to all our other context flags as well.
-            var nodeContextFlags = node.flags & 197132288 /* ContextFlags */;
-            if (nodeContextFlags !== contextFlags) {
-                return undefined;
-            }
-            // Ok, we have a node that looks like it could be reused.  Now verify that it is valid
-            // in the current list parsing context that we're currently at.
-            if (!canReuseNode(node, parsingContext)) {
-                return undefined;
-            }
-            return node;
-        }
-        function consumeNode(node) {
-            // Move the scanner so it is after the node we just consumed.
-            scanner.setTextPos(node.end);
-            nextToken();
-            return node;
-        }
-        function canReuseNode(node, parsingContext) {
-            switch (parsingContext) {
-                case 5 /* ClassMembers */:
-                    return isReusableClassMember(node);
-                case 2 /* SwitchClauses */:
-                    return isReusableSwitchClause(node);
-                case 0 /* SourceElements */:
-                case 1 /* BlockStatements */:
-                case 3 /* SwitchClauseStatements */:
-                    return isReusableStatement(node);
-                case 6 /* EnumMembers */:
-                    return isReusableEnumMember(node);
-                case 4 /* TypeMembers */:
-                    return isReusableTypeMember(node);
-                case 8 /* VariableDeclarations */:
-                    return isReusableVariableDeclaration(node);
-                case 16 /* Parameters */:
-                    return isReusableParameter(node);
-                // Any other lists we do not care about reusing nodes in.  But feel free to add if
-                // you can do so safely.  Danger areas involve nodes that may involve speculative
-                // parsing.  If speculative parsing is involved with the node, then the range the
-                // parser reached while looking ahead might be in the edited range (see the example
-                // in canReuseVariableDeclaratorNode for a good case of this).
-                case 20 /* HeritageClauses */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // heritage clauses.
-                case 17 /* TypeParameters */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // type parameters.  Note that that's because type *parameters* only occur in
-                // unambiguous *type* contexts.  While type *arguments* occur in very ambiguous
-                // *expression* contexts.
-                case 19 /* TupleElementTypes */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // tuple types.
-                // Technically, type argument list types are probably safe to reuse.  While
-                // speculative parsing is involved with them (since type argument lists are only
-                // produced from speculative parsing a < as a type argument list), we only have
-                // the types because speculative parsing succeeded.  Thus, the lookahead never
-                // went past the end of the list and rewound.
-                case 18 /* TypeArguments */:
-                // Note: these are almost certainly not safe to ever reuse.  Expressions commonly
-                // need a large amount of lookahead, and we should not reuse them as they may
-                // have actually intersected the edit.
-                case 11 /* ArgumentExpressions */:
-                // This is not safe to reuse for the same reason as the 'AssignmentExpression'
-                // cases.  i.e. a property assignment may end with an expression, and thus might
-                // have lookahead far beyond it's old node.
-                case 12 /* ObjectLiteralMembers */:
-                // This is probably not safe to reuse.  There can be speculative parsing with
-                // type names in a heritage clause.  There can be generic names in the type
-                // name list, and there can be left hand side expressions (which can have type
-                // arguments.)
-                case 7 /* HeritageClauseElement */:
-                // Perhaps safe to reuse, but it's unlikely we'd see more than a dozen attributes
-                // on any given element. Same for children.
-                case 13 /* JsxAttributes */:
-                case 14 /* JsxChildren */:
-            }
-            return false;
-        }
-        function isReusableClassMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 148 /* Constructor */:
-                    case 153 /* IndexSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 145 /* PropertyDeclaration */:
-                    case 198 /* SemicolonClassElement */:
-                        return true;
-                    case 147 /* MethodDeclaration */:
-                        // Method declarations are not necessarily reusable.  An object-literal
-                        // may have a method calls "constructor(...)" and we must reparse that
-                        // into an actual .ConstructorDeclaration.
-                        var methodDeclaration = node;
-                        var nameIsConstructor = methodDeclaration.name.kind === 69 /* Identifier */ &&
-                            methodDeclaration.name.originalKeywordKind === 121 /* ConstructorKeyword */;
-                        return !nameIsConstructor;
-                }
-            }
-            return false;
-        }
-        function isReusableSwitchClause(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 249 /* CaseClause */:
-                    case 250 /* DefaultClause */:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableStatement(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 200 /* VariableStatement */:
-                    case 199 /* Block */:
-                    case 203 /* IfStatement */:
-                    case 202 /* ExpressionStatement */:
-                    case 215 /* ThrowStatement */:
-                    case 211 /* ReturnStatement */:
-                    case 213 /* SwitchStatement */:
-                    case 210 /* BreakStatement */:
-                    case 209 /* ContinueStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 206 /* ForStatement */:
-                    case 205 /* WhileStatement */:
-                    case 212 /* WithStatement */:
-                    case 201 /* EmptyStatement */:
-                    case 216 /* TryStatement */:
-                    case 214 /* LabeledStatement */:
-                    case 204 /* DoStatement */:
-                    case 217 /* DebuggerStatement */:
-                    case 230 /* ImportDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 236 /* ExportDeclaration */:
-                    case 235 /* ExportAssignment */:
-                    case 225 /* ModuleDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableEnumMember(node) {
-            return node.kind === 255 /* EnumMember */;
-        }
-        function isReusableTypeMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 152 /* ConstructSignature */:
-                    case 146 /* MethodSignature */:
-                    case 153 /* IndexSignature */:
-                    case 144 /* PropertySignature */:
-                    case 151 /* CallSignature */:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableVariableDeclaration(node) {
-            if (node.kind !== 218 /* VariableDeclaration */) {
-                return false;
-            }
-            // Very subtle incremental parsing bug.  Consider the following code:
-            //
-            //      let v = new List < A, B
-            //
-            // This is actually legal code.  It's a list of variable declarators "v = new List<A"
-            // on one side and "B" on the other. If you then change that to:
-            //
-            //      let v = new List < A, B >()
-            //
-            // then we have a problem.  "v = new List<A" doesn't intersect the change range, so we
-            // start reparsing at "B" and we completely fail to handle this properly.
-            //
-            // In order to prevent this, we do not allow a variable declarator to be reused if it
-            // has an initializer.
-            var variableDeclarator = node;
-            return variableDeclarator.initializer === undefined;
-        }
-        function isReusableParameter(node) {
-            if (node.kind !== 142 /* Parameter */) {
-                return false;
-            }
-            // See the comment in isReusableVariableDeclaration for why we do this.
-            var parameter = node;
-            return parameter.initializer === undefined;
-        }
-        // Returns true if we should abort parsing.
-        function abortParsingListOrMoveToNextToken(kind) {
-            parseErrorAtCurrentToken(parsingContextErrors(kind));
-            if (isInSomeParsingContext()) {
-                return true;
-            }
-            nextToken();
-            return false;
-        }
-        function parsingContextErrors(context) {
-            switch (context) {
-                case 0 /* SourceElements */: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 1 /* BlockStatements */: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 2 /* SwitchClauses */: return ts.Diagnostics.case_or_default_expected;
-                case 3 /* SwitchClauseStatements */: return ts.Diagnostics.Statement_expected;
-                case 4 /* TypeMembers */: return ts.Diagnostics.Property_or_signature_expected;
-                case 5 /* ClassMembers */: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
-                case 6 /* EnumMembers */: return ts.Diagnostics.Enum_member_expected;
-                case 7 /* HeritageClauseElement */: return ts.Diagnostics.Expression_expected;
-                case 8 /* VariableDeclarations */: return ts.Diagnostics.Variable_declaration_expected;
-                case 9 /* ObjectBindingElements */: return ts.Diagnostics.Property_destructuring_pattern_expected;
-                case 10 /* ArrayBindingElements */: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
-                case 11 /* ArgumentExpressions */: return ts.Diagnostics.Argument_expression_expected;
-                case 12 /* ObjectLiteralMembers */: return ts.Diagnostics.Property_assignment_expected;
-                case 15 /* ArrayLiteralMembers */: return ts.Diagnostics.Expression_or_comma_expected;
-                case 16 /* Parameters */: return ts.Diagnostics.Parameter_declaration_expected;
-                case 17 /* TypeParameters */: return ts.Diagnostics.Type_parameter_declaration_expected;
-                case 18 /* TypeArguments */: return ts.Diagnostics.Type_argument_expected;
-                case 19 /* TupleElementTypes */: return ts.Diagnostics.Type_expected;
-                case 20 /* HeritageClauses */: return ts.Diagnostics.Unexpected_token_expected;
-                case 21 /* ImportOrExportSpecifiers */: return ts.Diagnostics.Identifier_expected;
-                case 13 /* JsxAttributes */: return ts.Diagnostics.Identifier_expected;
-                case 14 /* JsxChildren */: return ts.Diagnostics.Identifier_expected;
-                case 22 /* JSDocFunctionParameters */: return ts.Diagnostics.Parameter_declaration_expected;
-                case 23 /* JSDocTypeArguments */: return ts.Diagnostics.Type_argument_expected;
-                case 25 /* JSDocTupleTypes */: return ts.Diagnostics.Type_expected;
-                case 24 /* JSDocRecordMembers */: return ts.Diagnostics.Property_assignment_expected;
-            }
-        }
-        ;
-        // Parses a comma-delimited list of elements
-        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = [];
-            result.pos = getNodePos();
-            var commaStart = -1; // Meaning the previous token was not a comma
-            while (true) {
-                if (isListElement(kind, /*inErrorRecovery*/ false)) {
-                    result.push(parseListElement(kind, parseElement));
-                    commaStart = scanner.getTokenPos();
-                    if (parseOptional(24 /* CommaToken */)) {
-                        continue;
-                    }
-                    commaStart = -1; // Back to the state where the last token was not a comma
-                    if (isListTerminator(kind)) {
-                        break;
-                    }
-                    // We didn't get a comma, and the list wasn't terminated, explicitly parse
-                    // out a comma so we give a good error message.
-                    parseExpected(24 /* CommaToken */);
-                    // If the token was a semicolon, and the caller allows that, then skip it and
-                    // continue.  This ensures we get back on track and don't result in tons of
-                    // parse errors.  For example, this can happen when people do things like use
-                    // a semicolon to delimit object literal members.   Note: we'll have already
-                    // reported an error when we called parseExpected above.
-                    if (considerSemicolonAsDelimiter && token === 23 /* SemicolonToken */ && !scanner.hasPrecedingLineBreak()) {
-                        nextToken();
-                    }
-                    continue;
-                }
-                if (isListTerminator(kind)) {
-                    break;
-                }
-                if (abortParsingListOrMoveToNextToken(kind)) {
-                    break;
-                }
-            }
-            // Recording the trailing comma is deliberately done after the previous
-            // loop, and not just if we see a list terminator. This is because the list
-            // may have ended incorrectly, but it is still important to know if there
-            // was a trailing comma.
-            // Check if the last token was a comma.
-            if (commaStart >= 0) {
-                // Always preserve a trailing comma by marking it on the NodeArray
-                result.hasTrailingComma = true;
-            }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function createMissingList() {
-            var pos = getNodePos();
-            var result = [];
-            result.pos = pos;
-            result.end = pos;
-            return result;
-        }
-        function parseBracketedList(kind, parseElement, open, close) {
-            if (parseExpected(open)) {
-                var result = parseDelimitedList(kind, parseElement);
-                parseExpected(close);
-                return result;
-            }
-            return createMissingList();
-        }
-        // The allowReservedWords parameter controls whether reserved words are permitted after the first dot
-        function parseEntityName(allowReservedWords, diagnosticMessage) {
-            var entity = parseIdentifier(diagnosticMessage);
-            while (parseOptional(21 /* DotToken */)) {
-                var node = createNode(139 /* QualifiedName */, entity.pos); // !!!
-                node.left = entity;
-                node.right = parseRightSideOfDot(allowReservedWords);
-                entity = finishNode(node);
-            }
-            return entity;
-        }
-        function parseRightSideOfDot(allowIdentifierNames) {
-            // Technically a keyword is valid here as all identifiers and keywords are identifier names.
-            // However, often we'll encounter this in error situations when the identifier or keyword
-            // is actually starting another valid construct.
-            //
-            // So, we check for the following specific case:
-            //
-            //      name.
-            //      identifierOrKeyword identifierNameOrKeyword
-            //
-            // Note: the newlines are important here.  For example, if that above code
-            // were rewritten into:
-            //
-            //      name.identifierOrKeyword
-            //      identifierNameOrKeyword
-            //
-            // Then we would consider it valid.  That's because ASI would take effect and
-            // the code would be implicitly: "name.identifierOrKeyword; identifierNameOrKeyword".
-            // In the first case though, ASI will not take effect because there is not a
-            // line terminator after the identifier or keyword.
-            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token)) {
-                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                if (matchesPattern) {
-                    // Report that we need an identifier.  However, report it right after the dot,
-                    // and not on the next token.  This is because the next token might actually
-                    // be an identifier and the error would be quite confusing.
-                    return createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Identifier_expected);
-                }
-            }
-            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
-        }
-        function parseTemplateExpression() {
-            var template = createNode(189 /* TemplateExpression */);
-            template.head = parseTemplateLiteralFragment();
-            ts.Debug.assert(template.head.kind === 12 /* TemplateHead */, "Template head has wrong token kind");
-            var templateSpans = [];
-            templateSpans.pos = getNodePos();
-            do {
-                templateSpans.push(parseTemplateSpan());
-            } while (ts.lastOrUndefined(templateSpans).literal.kind === 13 /* TemplateMiddle */);
-            templateSpans.end = getNodeEnd();
-            template.templateSpans = templateSpans;
-            return finishNode(template);
-        }
-        function parseTemplateSpan() {
-            var span = createNode(197 /* TemplateSpan */);
-            span.expression = allowInAnd(parseExpression);
-            var literal;
-            if (token === 16 /* CloseBraceToken */) {
-                reScanTemplateToken();
-                literal = parseTemplateLiteralFragment();
-            }
-            else {
-                literal = parseExpectedToken(14 /* TemplateTail */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(16 /* CloseBraceToken */));
-            }
-            span.literal = literal;
-            return finishNode(span);
-        }
-        function parseStringLiteralTypeNode() {
-            return parseLiteralLikeNode(166 /* StringLiteralType */, /*internName*/ true);
-        }
-        function parseLiteralNode(internName) {
-            return parseLiteralLikeNode(token, internName);
-        }
-        function parseTemplateLiteralFragment() {
-            return parseLiteralLikeNode(token, /*internName*/ false);
-        }
-        function parseLiteralLikeNode(kind, internName) {
-            var node = createNode(kind);
-            var text = scanner.getTokenValue();
-            node.text = internName ? internIdentifier(text) : text;
-            if (scanner.hasExtendedUnicodeEscape()) {
-                node.hasExtendedUnicodeEscape = true;
-            }
-            if (scanner.isUnterminated()) {
-                node.isUnterminated = true;
-            }
-            var tokenPos = scanner.getTokenPos();
-            nextToken();
-            finishNode(node);
-            // Octal literals are not allowed in strict mode or ES5
-            // Note that theoretically the following condition would hold true literals like 009,
-            // which is not octal.But because of how the scanner separates the tokens, we would
-            // never get a token like this. Instead, we would get 00 and 9 as two separate tokens.
-            // We also do not need to check for negatives because any prefix operator would be part of a
-            // parent unary expression.
-            if (node.kind === 8 /* NumericLiteral */
-                && sourceText.charCodeAt(tokenPos) === 48 /* _0 */
-                && ts.isOctalDigit(sourceText.charCodeAt(tokenPos + 1))) {
-                node.isOctalLiteral = true;
-            }
-            return node;
-        }
-        // TYPES
-        function parseTypeReference() {
-            var typeName = parseEntityName(/*allowReservedWords*/ false, ts.Diagnostics.Type_expected);
-            var node = createNode(155 /* TypeReference */, typeName.pos);
-            node.typeName = typeName;
-            if (!scanner.hasPrecedingLineBreak() && token === 25 /* LessThanToken */) {
-                node.typeArguments = parseBracketedList(18 /* TypeArguments */, parseType, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
-            }
-            return finishNode(node);
-        }
-        function parseThisTypePredicate(lhs) {
-            nextToken();
-            var node = createNode(154 /* TypePredicate */, lhs.pos);
-            node.parameterName = lhs;
-            node.type = parseType();
-            return finishNode(node);
-        }
-        function parseThisTypeNode() {
-            var node = createNode(165 /* ThisType */);
-            nextToken();
-            return finishNode(node);
-        }
-        function parseTypeQuery() {
-            var node = createNode(158 /* TypeQuery */);
-            parseExpected(101 /* TypeOfKeyword */);
-            node.exprName = parseEntityName(/*allowReservedWords*/ true);
-            return finishNode(node);
-        }
-        function parseTypeParameter() {
-            var node = createNode(141 /* TypeParameter */);
-            node.name = parseIdentifier();
-            if (parseOptional(83 /* ExtendsKeyword */)) {
-                // It's not uncommon for people to write improper constraints to a generic.  If the
-                // user writes a constraint that is an expression and not an actual type, then parse
-                // it out as an expression (so we can recover well), but report that a type is needed
-                // instead.
-                if (isStartOfType() || !isStartOfExpression()) {
-                    node.constraint = parseType();
-                }
-                else {
-                    // It was not a type, and it looked like an expression.  Parse out an expression
-                    // here so we recover well.  Note: it is important that we call parseUnaryExpression
-                    // and not parseExpression here.  If the user has:
-                    //
-                    //      <T extends "">
-                    //
-                    // We do *not* want to consume the  >  as we're consuming the expression for "".
-                    node.expression = parseUnaryExpressionOrHigher();
-                }
-            }
-            return finishNode(node);
-        }
-        function parseTypeParameters() {
-            if (token === 25 /* LessThanToken */) {
-                return parseBracketedList(17 /* TypeParameters */, parseTypeParameter, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
-            }
-        }
-        function parseParameterType() {
-            if (parseOptional(54 /* ColonToken */)) {
-                return parseType();
-            }
-            return undefined;
-        }
-        function isStartOfParameter() {
-            return token === 22 /* DotDotDotToken */ || isIdentifierOrPattern() || ts.isModifierKind(token) || token === 55 /* AtToken */ || token === 97 /* ThisKeyword */;
-        }
-        function setModifiers(node, modifiers) {
-            if (modifiers) {
-                node.flags |= modifiers.flags;
-                node.modifiers = modifiers;
-            }
-        }
-        function parseParameter() {
-            var node = createNode(142 /* Parameter */);
-            if (token === 97 /* ThisKeyword */) {
-                node.name = createIdentifier(/*isIdentifier*/ true, undefined);
-                node.type = parseParameterType();
-                return finishNode(node);
-            }
-            node.decorators = parseDecorators();
-            setModifiers(node, parseModifiers());
-            node.dotDotDotToken = parseOptionalToken(22 /* DotDotDotToken */);
-            // FormalParameter [Yield,Await]:
-            //      BindingElement[?Yield,?Await]
-            node.name = parseIdentifierOrPattern();
-            if (ts.getFullWidth(node.name) === 0 && node.flags === 0 && ts.isModifierKind(token)) {
-                // in cases like
-                // 'use strict'
-                // function foo(static)
-                // isParameter('static') === true, because of isModifier('static')
-                // however 'static' is not a legal identifier in a strict mode.
-                // so result of this function will be ParameterDeclaration (flags = 0, name = missing, type = undefined, initializer = undefined)
-                // and current token will not change => parsing of the enclosing parameter list will last till the end of time (or OOM)
-                // to avoid this we'll advance cursor to the next token.
-                nextToken();
-            }
-            node.questionToken = parseOptionalToken(53 /* QuestionToken */);
-            node.type = parseParameterType();
-            node.initializer = parseBindingElementInitializer(/*inParameter*/ true);
-            // Do not check for initializers in an ambient context for parameters. This is not
-            // a grammar error because the grammar allows arbitrary call signatures in
-            // an ambient context.
-            // It is actually not necessary for this to be an error at all. The reason is that
-            // function/constructor implementations are syntactically disallowed in ambient
-            // contexts. In addition, parameter initializers are semantically disallowed in
-            // overload signatures. So parameter initializers are transitively disallowed in
-            // ambient contexts.
-            return addJSDocComment(finishNode(node));
-        }
-        function parseBindingElementInitializer(inParameter) {
-            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
-        }
-        function parseParameterInitializer() {
-            return parseInitializer(/*inParameter*/ true);
-        }
-        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
-            var returnTokenRequired = returnToken === 34 /* EqualsGreaterThanToken */;
-            signature.typeParameters = parseTypeParameters();
-            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
-            if (returnTokenRequired) {
-                parseExpected(returnToken);
-                signature.type = parseTypeOrTypePredicate();
-            }
-            else if (parseOptional(returnToken)) {
-                signature.type = parseTypeOrTypePredicate();
-            }
-        }
-        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
-            // FormalParameters [Yield,Await]: (modified)
-            //      [empty]
-            //      FormalParameterList[?Yield,Await]
-            //
-            // FormalParameter[Yield,Await]: (modified)
-            //      BindingElement[?Yield,Await]
-            //
-            // BindingElement [Yield,Await]: (modified)
-            //      SingleNameBinding[?Yield,?Await]
-            //      BindingPattern[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
-            //
-            // SingleNameBinding [Yield,Await]:
-            //      BindingIdentifier[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
-            if (parseExpected(17 /* OpenParenToken */)) {
-                var savedYieldContext = inYieldContext();
-                var savedAwaitContext = inAwaitContext();
-                setYieldContext(yieldContext);
-                setAwaitContext(awaitContext);
-                var result = parseDelimitedList(16 /* Parameters */, parseParameter);
-                setYieldContext(savedYieldContext);
-                setAwaitContext(savedAwaitContext);
-                if (!parseExpected(18 /* CloseParenToken */) && requireCompleteParameterList) {
-                    // Caller insisted that we had to end with a )   We didn't.  So just return
-                    // undefined here.
-                    return undefined;
-                }
-                return result;
-            }
-            // We didn't even have an open paren.  If the caller requires a complete parameter list,
-            // we definitely can't provide that.  However, if they're ok with an incomplete one,
-            // then just return an empty set of parameters.
-            return requireCompleteParameterList ? undefined : createMissingList();
-        }
-        function parseTypeMemberSemicolon() {
-            // We allow type members to be separated by commas or (possibly ASI) semicolons.
-            // First check if it was a comma.  If so, we're done with the member.
-            if (parseOptional(24 /* CommaToken */)) {
-                return;
-            }
-            // Didn't have a comma.  We must have a (possible ASI) semicolon.
-            parseSemicolon();
-        }
-        function parseSignatureMember(kind) {
-            var node = createNode(kind);
-            if (kind === 152 /* ConstructSignature */) {
-                parseExpected(92 /* NewKeyword */);
-            }
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            parseTypeMemberSemicolon();
-            return finishNode(node);
-        }
-        function isIndexSignature() {
-            if (token !== 19 /* OpenBracketToken */) {
-                return false;
-            }
-            return lookAhead(isUnambiguouslyIndexSignature);
-        }
-        function isUnambiguouslyIndexSignature() {
-            // The only allowed sequence is:
-            //
-            //   [id:
-            //
-            // However, for error recovery, we also check the following cases:
-            //
-            //   [...
-            //   [id,
-            //   [id?,
-            //   [id?:
-            //   [id?]
-            //   [public id
-            //   [private id
-            //   [protected id
-            //   []
-            //
-            nextToken();
-            if (token === 22 /* DotDotDotToken */ || token === 20 /* CloseBracketToken */) {
-                return true;
-            }
-            if (ts.isModifierKind(token)) {
-                nextToken();
-                if (isIdentifier()) {
-                    return true;
-                }
-            }
-            else if (!isIdentifier()) {
-                return false;
-            }
-            else {
-                // Skip the identifier
-                nextToken();
-            }
-            // A colon signifies a well formed indexer
-            // A comma should be a badly formed indexer because comma expressions are not allowed
-            // in computed properties.
-            if (token === 54 /* ColonToken */ || token === 24 /* CommaToken */) {
-                return true;
-            }
-            // Question mark could be an indexer with an optional property,
-            // or it could be a conditional expression in a computed property.
-            if (token !== 53 /* QuestionToken */) {
-                return false;
-            }
-            // If any of the following tokens are after the question mark, it cannot
-            // be a conditional expression, so treat it as an indexer.
-            nextToken();
-            return token === 54 /* ColonToken */ || token === 24 /* CommaToken */ || token === 20 /* CloseBracketToken */;
-        }
-        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(153 /* IndexSignature */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.parameters = parseBracketedList(16 /* Parameters */, parseParameter, 19 /* OpenBracketToken */, 20 /* CloseBracketToken */);
-            node.type = parseTypeAnnotation();
-            parseTypeMemberSemicolon();
-            return finishNode(node);
-        }
-        function parsePropertyOrMethodSignature(fullStart, modifiers) {
-            var name = parsePropertyName();
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
-                var method = createNode(146 /* MethodSignature */, fullStart);
-                setModifiers(method, modifiers);
-                method.name = name;
-                method.questionToken = questionToken;
-                // Method signatures don't exist in expression contexts.  So they have neither
-                // [Yield] nor [Await]
-                fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, method);
-                parseTypeMemberSemicolon();
-                return finishNode(method);
-            }
-            else {
-                var property = createNode(144 /* PropertySignature */, fullStart);
-                setModifiers(property, modifiers);
-                property.name = name;
-                property.questionToken = questionToken;
-                property.type = parseTypeAnnotation();
-                if (token === 56 /* EqualsToken */) {
-                    // Although type literal properties cannot not have initializers, we attempt
-                    // to parse an initializer so we can report in the checker that an interface
-                    // property or type literal property cannot have an initializer.
-                    property.initializer = parseNonParameterInitializer();
-                }
-                parseTypeMemberSemicolon();
-                return finishNode(property);
-            }
-        }
-        function isTypeMemberStart() {
-            var idToken;
-            // Return true if we have the start of a signature member
-            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
-                return true;
-            }
-            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier
-            while (ts.isModifierKind(token)) {
-                idToken = token;
-                nextToken();
-            }
-            // Index signatures and computed property names are type members
-            if (token === 19 /* OpenBracketToken */) {
-                return true;
-            }
-            // Try to get the first property-like token following all modifiers
-            if (isLiteralPropertyName()) {
-                idToken = token;
-                nextToken();
-            }
-            // If we were able to get any potential identifier, check that it is
-            // the start of a member declaration
-            if (idToken) {
-                return token === 17 /* OpenParenToken */ ||
-                    token === 25 /* LessThanToken */ ||
-                    token === 53 /* QuestionToken */ ||
-                    token === 54 /* ColonToken */ ||
-                    canParseSemicolon();
-            }
-            return false;
-        }
-        function parseTypeMember() {
-            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
-                return parseSignatureMember(151 /* CallSignature */);
-            }
-            if (token === 92 /* NewKeyword */ && lookAhead(isStartOfConstructSignature)) {
-                return parseSignatureMember(152 /* ConstructSignature */);
-            }
-            var fullStart = getNodePos();
-            var modifiers = parseModifiers();
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, /*decorators*/ undefined, modifiers);
-            }
-            return parsePropertyOrMethodSignature(fullStart, modifiers);
-        }
-        function isStartOfConstructSignature() {
-            nextToken();
-            return token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */;
-        }
-        function parseTypeLiteral() {
-            var node = createNode(159 /* TypeLiteral */);
-            node.members = parseObjectTypeMembers();
-            return finishNode(node);
-        }
-        function parseObjectTypeMembers() {
-            var members;
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                members = parseList(4 /* TypeMembers */, parseTypeMember);
-                parseExpected(16 /* CloseBraceToken */);
-            }
-            else {
-                members = createMissingList();
-            }
-            return members;
-        }
-        function parseTupleType() {
-            var node = createNode(161 /* TupleType */);
-            node.elementTypes = parseBracketedList(19 /* TupleElementTypes */, parseType, 19 /* OpenBracketToken */, 20 /* CloseBracketToken */);
-            return finishNode(node);
-        }
-        function parseParenthesizedType() {
-            var node = createNode(164 /* ParenthesizedType */);
-            parseExpected(17 /* OpenParenToken */);
-            node.type = parseType();
-            parseExpected(18 /* CloseParenToken */);
-            return finishNode(node);
-        }
-        function parseFunctionOrConstructorType(kind) {
-            var node = createNode(kind);
-            if (kind === 157 /* ConstructorType */) {
-                parseExpected(92 /* NewKeyword */);
-            }
-            fillSignature(34 /* EqualsGreaterThanToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            return finishNode(node);
-        }
-        function parseKeywordAndNoDot() {
-            var node = parseTokenNode();
-            return token === 21 /* DotToken */ ? undefined : node;
-        }
-        function parseNonArrayType() {
-            switch (token) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 127 /* NeverKeyword */:
-                    // If these are followed by a dot, then parse these out as a dotted type reference instead.
-                    var node = tryParse(parseKeywordAndNoDot);
-                    return node || parseTypeReference();
-                case 9 /* StringLiteral */:
-                    return parseStringLiteralTypeNode();
-                case 103 /* VoidKeyword */:
-                case 93 /* NullKeyword */:
-                    return parseTokenNode();
-                case 97 /* ThisKeyword */: {
-                    var thisKeyword = parseThisTypeNode();
-                    if (token === 124 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
-                        return parseThisTypePredicate(thisKeyword);
-                    }
-                    else {
-                        return thisKeyword;
-                    }
-                }
-                case 101 /* TypeOfKeyword */:
-                    return parseTypeQuery();
-                case 15 /* OpenBraceToken */:
-                    return parseTypeLiteral();
-                case 19 /* OpenBracketToken */:
-                    return parseTupleType();
-                case 17 /* OpenParenToken */:
-                    return parseParenthesizedType();
-                default:
-                    return parseTypeReference();
-            }
-        }
-        function isStartOfType() {
-            switch (token) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 103 /* VoidKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 93 /* NullKeyword */:
-                case 97 /* ThisKeyword */:
-                case 101 /* TypeOfKeyword */:
-                case 127 /* NeverKeyword */:
-                case 15 /* OpenBraceToken */:
-                case 19 /* OpenBracketToken */:
-                case 25 /* LessThanToken */:
-                case 92 /* NewKeyword */:
-                case 9 /* StringLiteral */:
-                    return true;
-                case 17 /* OpenParenToken */:
-                    // Only consider '(' the start of a type if followed by ')', '...', an identifier, a modifier,
-                    // or something that starts a type. We don't want to consider things like '(1)' a type.
-                    return lookAhead(isStartOfParenthesizedOrFunctionType);
-                default:
-                    return isIdentifier();
-            }
-        }
-        function isStartOfParenthesizedOrFunctionType() {
-            nextToken();
-            return token === 18 /* CloseParenToken */ || isStartOfParameter() || isStartOfType();
-        }
-        function parseArrayTypeOrHigher() {
-            var type = parseNonArrayType();
-            while (!scanner.hasPrecedingLineBreak() && parseOptional(19 /* OpenBracketToken */)) {
-                parseExpected(20 /* CloseBracketToken */);
-                var node = createNode(160 /* ArrayType */, type.pos);
-                node.elementType = type;
-                type = finishNode(node);
-            }
-            return type;
-        }
-        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
-            var type = parseConstituentType();
-            if (token === operator) {
-                var types = [type];
-                types.pos = type.pos;
-                while (parseOptional(operator)) {
-                    types.push(parseConstituentType());
-                }
-                types.end = getNodeEnd();
-                var node = createNode(kind, type.pos);
-                node.types = types;
-                type = finishNode(node);
-            }
-            return type;
-        }
-        function parseIntersectionTypeOrHigher() {
-            return parseUnionOrIntersectionType(163 /* IntersectionType */, parseArrayTypeOrHigher, 46 /* AmpersandToken */);
-        }
-        function parseUnionTypeOrHigher() {
-            return parseUnionOrIntersectionType(162 /* UnionType */, parseIntersectionTypeOrHigher, 47 /* BarToken */);
-        }
-        function isStartOfFunctionType() {
-            if (token === 25 /* LessThanToken */) {
-                return true;
-            }
-            return token === 17 /* OpenParenToken */ && lookAhead(isUnambiguouslyStartOfFunctionType);
-        }
-        function skipParameterStart() {
-            if (ts.isModifierKind(token)) {
-                // Skip modifiers
-                parseModifiers();
-            }
-            if (isIdentifier() || token === 97 /* ThisKeyword */) {
-                nextToken();
-                return true;
-            }
-            if (token === 19 /* OpenBracketToken */ || token === 15 /* OpenBraceToken */) {
-                // Return true if we can parse an array or object binding pattern with no errors
-                var previousErrorCount = parseDiagnostics.length;
-                parseIdentifierOrPattern();
-                return previousErrorCount === parseDiagnostics.length;
-            }
-            return false;
-        }
-        function isUnambiguouslyStartOfFunctionType() {
-            nextToken();
-            if (token === 18 /* CloseParenToken */ || token === 22 /* DotDotDotToken */) {
-                // ( )
-                // ( ...
-                return true;
-            }
-            if (skipParameterStart()) {
-                // We successfully skipped modifiers (if any) and an identifier or binding pattern,
-                // now see if we have something that indicates a parameter declaration
-                if (token === 54 /* ColonToken */ || token === 24 /* CommaToken */ ||
-                    token === 53 /* QuestionToken */ || token === 56 /* EqualsToken */) {
-                    // ( xxx :
-                    // ( xxx ,
-                    // ( xxx ?
-                    // ( xxx =
-                    return true;
-                }
-                if (token === 18 /* CloseParenToken */) {
-                    nextToken();
-                    if (token === 34 /* EqualsGreaterThanToken */) {
-                        // ( xxx ) =>
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function parseTypeOrTypePredicate() {
-            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
-            var type = parseType();
-            if (typePredicateVariable) {
-                var node = createNode(154 /* TypePredicate */, typePredicateVariable.pos);
-                node.parameterName = typePredicateVariable;
-                node.type = type;
-                return finishNode(node);
-            }
-            else {
-                return type;
-            }
-        }
-        function parseTypePredicatePrefix() {
-            var id = parseIdentifier();
-            if (token === 124 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
-                nextToken();
-                return id;
-            }
-        }
-        function parseType() {
-            // The rules about 'yield' only apply to actual code/expression contexts.  They don't
-            // apply to 'type' contexts.  So we disable these parameters here before moving on.
-            return doOutsideOfContext(41943040 /* TypeExcludesFlags */, parseTypeWorker);
-        }
-        function parseTypeWorker() {
-            if (isStartOfFunctionType()) {
-                return parseFunctionOrConstructorType(156 /* FunctionType */);
-            }
-            if (token === 92 /* NewKeyword */) {
-                return parseFunctionOrConstructorType(157 /* ConstructorType */);
-            }
-            return parseUnionTypeOrHigher();
-        }
-        function parseTypeAnnotation() {
-            return parseOptional(54 /* ColonToken */) ? parseType() : undefined;
-        }
-        // EXPRESSIONS
-        function isStartOfLeftHandSideExpression() {
-            switch (token) {
-                case 97 /* ThisKeyword */:
-                case 95 /* SuperKeyword */:
-                case 93 /* NullKeyword */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                case 8 /* NumericLiteral */:
-                case 9 /* StringLiteral */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                case 12 /* TemplateHead */:
-                case 17 /* OpenParenToken */:
-                case 19 /* OpenBracketToken */:
-                case 15 /* OpenBraceToken */:
-                case 87 /* FunctionKeyword */:
-                case 73 /* ClassKeyword */:
-                case 92 /* NewKeyword */:
-                case 39 /* SlashToken */:
-                case 61 /* SlashEqualsToken */:
-                case 69 /* Identifier */:
-                    return true;
-                default:
-                    return isIdentifier();
-            }
-        }
-        function isStartOfExpression() {
-            if (isStartOfLeftHandSideExpression()) {
-                return true;
-            }
-            switch (token) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                case 78 /* DeleteKeyword */:
-                case 101 /* TypeOfKeyword */:
-                case 103 /* VoidKeyword */:
-                case 41 /* PlusPlusToken */:
-                case 42 /* MinusMinusToken */:
-                case 25 /* LessThanToken */:
-                case 119 /* AwaitKeyword */:
-                case 114 /* YieldKeyword */:
-                    // Yield/await always starts an expression.  Either it is an identifier (in which case
-                    // it is definitely an expression).  Or it's a keyword (either because we're in
-                    // a generator or async function, or in strict mode (or both)) and it started a yield or await expression.
-                    return true;
-                default:
-                    // Error tolerance.  If we see the start of some binary operator, we consider
-                    // that the start of an expression.  That way we'll parse out a missing identifier,
-                    // give a good message about an identifier being missing, and then consume the
-                    // rest of the binary expression.
-                    if (isBinaryOperator()) {
-                        return true;
-                    }
-                    return isIdentifier();
-            }
-        }
-        function isStartOfExpressionStatement() {
-            // As per the grammar, none of '{' or 'function' or 'class' can start an expression statement.
-            return token !== 15 /* OpenBraceToken */ &&
-                token !== 87 /* FunctionKeyword */ &&
-                token !== 73 /* ClassKeyword */ &&
-                token !== 55 /* AtToken */ &&
-                isStartOfExpression();
-        }
-        function parseExpression() {
-            // Expression[in]:
-            //      AssignmentExpression[in]
-            //      Expression[in] , AssignmentExpression[in]
-            // clear the decorator context when parsing Expression, as it should be unambiguous when parsing a decorator
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
-            }
-            var expr = parseAssignmentExpressionOrHigher();
-            var operatorToken;
-            while ((operatorToken = parseOptionalToken(24 /* CommaToken */))) {
-                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
-            }
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
-            }
-            return expr;
-        }
-        function parseInitializer(inParameter) {
-            if (token !== 56 /* EqualsToken */) {
-                // It's not uncommon during typing for the user to miss writing the '=' token.  Check if
-                // there is no newline after the last token and if we're on an expression.  If so, parse
-                // this as an equals-value clause with a missing equals.
-                // NOTE: There are two places where we allow equals-value clauses.  The first is in a
-                // variable declarator.  The second is with a parameter.  For variable declarators
-                // it's more likely that a { would be a allowed (as an object literal).  While this
-                // is also allowed for parameters, the risk is that we consume the { as an object
-                // literal when it really will be for the block following the parameter.
-                if (scanner.hasPrecedingLineBreak() || (inParameter && token === 15 /* OpenBraceToken */) || !isStartOfExpression()) {
-                    // preceding line break, open brace in a parameter (likely a function body) or current token is not an expression -
-                    // do not try to parse initializer
-                    return undefined;
-                }
-            }
-            // Initializer[In, Yield] :
-            //     = AssignmentExpression[?In, ?Yield]
-            parseExpected(56 /* EqualsToken */);
-            return parseAssignmentExpressionOrHigher();
-        }
-        function parseAssignmentExpressionOrHigher() {
-            //  AssignmentExpression[in,yield]:
-            //      1) ConditionalExpression[?in,?yield]
-            //      2) LeftHandSideExpression = AssignmentExpression[?in,?yield]
-            //      3) LeftHandSideExpression AssignmentOperator AssignmentExpression[?in,?yield]
-            //      4) ArrowFunctionExpression[?in,?yield]
-            //      5) AsyncArrowFunctionExpression[in,yield,await]
-            //      6) [+Yield] YieldExpression[?In]
-            //
-            // Note: for ease of implementation we treat productions '2' and '3' as the same thing.
-            // (i.e. they're both BinaryExpressions with an assignment operator in it).
-            // First, do the simple check if we have a YieldExpression (production '5').
-            if (isYieldExpression()) {
-                return parseYieldExpression();
-            }
-            // Then, check if we have an arrow function (production '4' and '5') that starts with a parenthesized
-            // parameter list or is an async arrow function.
-            // AsyncArrowFunctionExpression:
-            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
-            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
-            // Production (1) of AsyncArrowFunctionExpression is parsed in "tryParseAsyncSimpleArrowFunctionExpression".
-            // And production (2) is parsed in "tryParseParenthesizedArrowFunctionExpression". 
-            //
-            // If we do successfully parse arrow-function, we must *not* recurse for productions 1, 2 or 3. An ArrowFunction is
-            // not a  LeftHandSideExpression, nor does it start a ConditionalExpression.  So we are done
-            // with AssignmentExpression if we see one.
-            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
-            if (arrowExpression) {
-                return arrowExpression;
-            }
-            // Now try to see if we're in production '1', '2' or '3'.  A conditional expression can
-            // start with a LogicalOrExpression, while the assignment productions can only start with
-            // LeftHandSideExpressions.
-            //
-            // So, first, we try to just parse out a BinaryExpression.  If we get something that is a
-            // LeftHandSide or higher, then we can try to parse out the assignment expression part.
-            // Otherwise, we try to parse out the conditional expression bit.  We want to allow any
-            // binary expression here, so we pass in the 'lowest' precedence here so that it matches
-            // and consumes anything.
-            var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-            // To avoid a look-ahead, we did not handle the case of an arrow function with a single un-parenthesized
-            // parameter ('x => ...') above. We handle it here by checking if the parsed expression was a single
-            // identifier and the current token is an arrow.
-            if (expr.kind === 69 /* Identifier */ && token === 34 /* EqualsGreaterThanToken */) {
-                return parseSimpleArrowFunctionExpression(expr);
-            }
-            // Now see if we might be in cases '2' or '3'.
-            // If the expression was a LHS expression, and we have an assignment operator, then
-            // we're in '2' or '3'. Consume the assignment and return.
-            //
-            // Note: we call reScanGreaterToken so that we get an appropriately merged token
-            // for cases like > > =  becoming >>=
-            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
-                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
-            }
-            // It wasn't an assignment or a lambda.  This is a conditional expression:
-            return parseConditionalExpressionRest(expr);
-        }
-        function isYieldExpression() {
-            if (token === 114 /* YieldKeyword */) {
-                // If we have a 'yield' keyword, and this is a context where yield expressions are
-                // allowed, then definitely parse out a yield expression.
-                if (inYieldContext()) {
-                    return true;
-                }
-                // We're in a context where 'yield expr' is not allowed.  However, if we can
-                // definitely tell that the user was trying to parse a 'yield expr' and not
-                // just a normal expr that start with a 'yield' identifier, then parse out
-                // a 'yield expr'.  We can then report an error later that they are only
-                // allowed in generator expressions.
-                //
-                // for example, if we see 'yield(foo)', then we'll have to treat that as an
-                // invocation expression of something called 'yield'.  However, if we have
-                // 'yield foo' then that is not legal as a normal expression, so we can
-                // definitely recognize this as a yield expression.
-                //
-                // for now we just check if the next token is an identifier.  More heuristics
-                // can be added here later as necessary.  We just need to make sure that we
-                // don't accidentally consume something legal.
-                return lookAhead(nextTokenIsIdentifierOrKeywordOrNumberOnSameLine);
-            }
-            return false;
-        }
-        function nextTokenIsIdentifierOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && isIdentifier();
-        }
-        function parseYieldExpression() {
-            var node = createNode(190 /* YieldExpression */);
-            // YieldExpression[In] :
-            //      yield
-            //      yield [no LineTerminator here] [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
-            //      yield [no LineTerminator here] * [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
-            nextToken();
-            if (!scanner.hasPrecedingLineBreak() &&
-                (token === 37 /* AsteriskToken */ || isStartOfExpression())) {
-                node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-                node.expression = parseAssignmentExpressionOrHigher();
-                return finishNode(node);
-            }
-            else {
-                // if the next token is not on the same line as yield.  or we don't have an '*' or
-                // the start of an expression, then this is just a simple "yield" expression.
-                return finishNode(node);
-            }
-        }
-        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
-            ts.Debug.assert(token === 34 /* EqualsGreaterThanToken */, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
-            var node;
-            if (asyncModifier) {
-                node = createNode(180 /* ArrowFunction */, asyncModifier.pos);
-                setModifiers(node, asyncModifier);
-            }
-            else {
-                node = createNode(180 /* ArrowFunction */, identifier.pos);
-            }
-            var parameter = createNode(142 /* Parameter */, identifier.pos);
-            parameter.name = identifier;
-            finishNode(parameter);
-            node.parameters = [parameter];
-            node.parameters.pos = parameter.pos;
-            node.parameters.end = parameter.end;
-            node.equalsGreaterThanToken = parseExpectedToken(34 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
-            node.body = parseArrowFunctionExpressionBody(/*isAsync*/ !!asyncModifier);
-            return finishNode(node);
-        }
-        function tryParseParenthesizedArrowFunctionExpression() {
-            var triState = isParenthesizedArrowFunctionExpression();
-            if (triState === 0 /* False */) {
-                // It's definitely not a parenthesized arrow function expression.
-                return undefined;
-            }
-            // If we definitely have an arrow function, then we can just parse one, not requiring a
-            // following => or { token. Otherwise, we *might* have an arrow function.  Try to parse
-            // it out, but don't allow any ambiguity, and return 'undefined' if this could be an
-            // expression instead.
-            var arrowFunction = triState === 1 /* True */
-                ? parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ true)
-                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
-            if (!arrowFunction) {
-                // Didn't appear to actually be a parenthesized arrow function.  Just bail out.
-                return undefined;
-            }
-            var isAsync = !!(arrowFunction.flags & 256 /* Async */);
-            // If we have an arrow, then try to parse the body. Even if not, try to parse if we
-            // have an opening brace, just in case we're in an error state.
-            var lastToken = token;
-            arrowFunction.equalsGreaterThanToken = parseExpectedToken(34 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
-            arrowFunction.body = (lastToken === 34 /* EqualsGreaterThanToken */ || lastToken === 15 /* OpenBraceToken */)
-                ? parseArrowFunctionExpressionBody(isAsync)
-                : parseIdentifier();
-            return finishNode(arrowFunction);
-        }
-        //  True        -> We definitely expect a parenthesized arrow function here.
-        //  False       -> There *cannot* be a parenthesized arrow function here.
-        //  Unknown     -> There *might* be a parenthesized arrow function here.
-        //                 Speculatively look ahead to be sure, and rollback if not.
-        function isParenthesizedArrowFunctionExpression() {
-            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */ || token === 118 /* AsyncKeyword */) {
-                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
-            }
-            if (token === 34 /* EqualsGreaterThanToken */) {
-                // ERROR RECOVERY TWEAK:
-                // If we see a standalone => try to parse it as an arrow function expression as that's
-                // likely what the user intended to write.
-                return 1 /* True */;
-            }
-            // Definitely not a parenthesized arrow function.
-            return 0 /* False */;
-        }
-        function isParenthesizedArrowFunctionExpressionWorker() {
-            if (token === 118 /* AsyncKeyword */) {
-                nextToken();
-                if (scanner.hasPrecedingLineBreak()) {
-                    return 0 /* False */;
-                }
-                if (token !== 17 /* OpenParenToken */ && token !== 25 /* LessThanToken */) {
-                    return 0 /* False */;
-                }
-            }
-            var first = token;
-            var second = nextToken();
-            if (first === 17 /* OpenParenToken */) {
-                if (second === 18 /* CloseParenToken */) {
-                    // Simple cases: "() =>", "(): ", and  "() {".
-                    // This is an arrow function with no parameters.
-                    // The last one is not actually an arrow function,
-                    // but this is probably what the user intended.
-                    var third = nextToken();
-                    switch (third) {
-                        case 34 /* EqualsGreaterThanToken */:
-                        case 54 /* ColonToken */:
-                        case 15 /* OpenBraceToken */:
-                            return 1 /* True */;
-                        default:
-                            return 0 /* False */;
-                    }
-                }
-                // If encounter "([" or "({", this could be the start of a binding pattern.
-                // Examples:
-                //      ([ x ]) => { }
-                //      ({ x }) => { }
-                //      ([ x ])
-                //      ({ x })
-                if (second === 19 /* OpenBracketToken */ || second === 15 /* OpenBraceToken */) {
-                    return 2 /* Unknown */;
-                }
-                // Simple case: "(..."
-                // This is an arrow function with a rest parameter.
-                if (second === 22 /* DotDotDotToken */) {
-                    return 1 /* True */;
-                }
-                // If we had "(" followed by something that's not an identifier,
-                // then this definitely doesn't look like a lambda.
-                // Note: we could be a little more lenient and allow
-                // "(public" or "(private". These would not ever actually be allowed,
-                // but we could provide a good error message instead of bailing out.
-                if (!isIdentifier()) {
-                    return 0 /* False */;
-                }
-                // If we have something like "(a:", then we must have a
-                // type-annotated parameter in an arrow function expression.
-                if (nextToken() === 54 /* ColonToken */) {
-                    return 1 /* True */;
-                }
-                // This *could* be a parenthesized arrow function.
-                // Return Unknown to let the caller know.
-                return 2 /* Unknown */;
-            }
-            else {
-                ts.Debug.assert(first === 25 /* LessThanToken */);
-                // If we have "<" not followed by an identifier,
-                // then this definitely is not an arrow function.
-                if (!isIdentifier()) {
-                    return 0 /* False */;
-                }
-                // JSX overrides
-                if (sourceFile.languageVariant === 1 /* JSX */) {
-                    var isArrowFunctionInJsx = lookAhead(function () {
-                        var third = nextToken();
-                        if (third === 83 /* ExtendsKeyword */) {
-                            var fourth = nextToken();
-                            switch (fourth) {
-                                case 56 /* EqualsToken */:
-                                case 27 /* GreaterThanToken */:
-                                    return false;
-                                default:
-                                    return true;
-                            }
-                        }
-                        else if (third === 24 /* CommaToken */) {
-                            return true;
-                        }
-                        return false;
-                    });
-                    if (isArrowFunctionInJsx) {
-                        return 1 /* True */;
-                    }
-                    return 0 /* False */;
-                }
-                // This *could* be a parenthesized arrow function.
-                return 2 /* Unknown */;
-            }
-        }
-        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
-            return parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ false);
-        }
-        function tryParseAsyncSimpleArrowFunctionExpression() {
-            // We do a check here so that we won't be doing unnecessarily call to "lookAhead"
-            if (token === 118 /* AsyncKeyword */) {
-                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
-                if (isUnParenthesizedAsyncArrowFunction === 1 /* True */) {
-                    var asyncModifier = parseModifiersForArrowFunction();
-                    var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
-                }
-            }
-            return undefined;
-        }
-        function isUnParenthesizedAsyncArrowFunctionWorker() {
-            // AsyncArrowFunctionExpression:
-            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
-            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
-            if (token === 118 /* AsyncKeyword */) {
-                nextToken();
-                // If the "async" is followed by "=>" token then it is not a begining of an async arrow-function
-                // but instead a simple arrow-function which will be parsed inside "parseAssignmentExpressionOrHigher"
-                if (scanner.hasPrecedingLineBreak() || token === 34 /* EqualsGreaterThanToken */) {
-                    return 0 /* False */;
-                }
-                // Check for un-parenthesized AsyncArrowFunction
-                var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-                if (!scanner.hasPrecedingLineBreak() && expr.kind === 69 /* Identifier */ && token === 34 /* EqualsGreaterThanToken */) {
-                    return 1 /* True */;
-                }
-            }
-            return 0 /* False */;
-        }
-        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
-            var node = createNode(180 /* ArrowFunction */);
-            setModifiers(node, parseModifiersForArrowFunction());
-            var isAsync = !!(node.flags & 256 /* Async */);
-            // Arrow functions are never generators.
-            //
-            // If we're speculatively parsing a signature for a parenthesized arrow function, then
-            // we have to have a complete parameter list.  Otherwise we might see something like
-            // a => (b => c)
-            // And think that "(b =>" was actually a parenthesized arrow function with a missing
-            // close paren.
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ !allowAmbiguity, node);
-            // If we couldn't get parameters, we definitely could not parse out an arrow function.
-            if (!node.parameters) {
-                return undefined;
-            }
-            // Parsing a signature isn't enough.
-            // Parenthesized arrow signatures often look like other valid expressions.
-            // For instance:
-            //  - "(x = 10)" is an assignment expression parsed as a signature with a default parameter value.
-            //  - "(x,y)" is a comma expression parsed as a signature with two parameters.
-            //  - "a ? (b): c" will have "(b):" parsed as a signature with a return type annotation.
-            //
-            // So we need just a bit of lookahead to ensure that it can only be a signature.
-            if (!allowAmbiguity && token !== 34 /* EqualsGreaterThanToken */ && token !== 15 /* OpenBraceToken */) {
-                // Returning undefined here will cause our caller to rewind to where we started from.
-                return undefined;
-            }
-            return node;
-        }
-        function parseArrowFunctionExpressionBody(isAsync) {
-            if (token === 15 /* OpenBraceToken */) {
-                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
-            }
-            if (token !== 23 /* SemicolonToken */ &&
-                token !== 87 /* FunctionKeyword */ &&
-                token !== 73 /* ClassKeyword */ &&
-                isStartOfStatement() &&
-                !isStartOfExpressionStatement()) {
-                // Check if we got a plain statement (i.e. no expression-statements, no function/class expressions/declarations)
-                //
-                // Here we try to recover from a potential error situation in the case where the
-                // user meant to supply a block. For example, if the user wrote:
-                //
-                //  a =>
-                //      let v = 0;
-                //  }
-                //
-                // they may be missing an open brace.  Check to see if that's the case so we can
-                // try to recover better.  If we don't do this, then the next close curly we see may end
-                // up preemptively closing the containing construct.
-                //
-                // Note: even when 'ignoreMissingOpenBrace' is passed as true, parseBody will still error.
-                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ true);
-            }
-            return isAsync
-                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
-                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
-        }
-        function parseConditionalExpressionRest(leftOperand) {
-            // Note: we are passed in an expression which was produced from parseBinaryExpressionOrHigher.
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (!questionToken) {
-                return leftOperand;
-            }
-            // Note: we explicitly 'allowIn' in the whenTrue part of the condition expression, and
-            // we do not that for the 'whenFalse' part.
-            var node = createNode(188 /* ConditionalExpression */, leftOperand.pos);
-            node.condition = leftOperand;
-            node.questionToken = questionToken;
-            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
-            node.colonToken = parseExpectedToken(54 /* ColonToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(54 /* ColonToken */));
-            node.whenFalse = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
-        }
-        function parseBinaryExpressionOrHigher(precedence) {
-            var leftOperand = parseUnaryExpressionOrHigher();
-            return parseBinaryExpressionRest(precedence, leftOperand);
-        }
-        function isInOrOfKeyword(t) {
-            return t === 90 /* InKeyword */ || t === 138 /* OfKeyword */;
-        }
-        function parseBinaryExpressionRest(precedence, leftOperand) {
-            while (true) {
-                // We either have a binary operator here, or we're finished.  We call
-                // reScanGreaterToken so that we merge token sequences like > and = into >=
-                reScanGreaterToken();
-                var newPrecedence = getBinaryOperatorPrecedence();
-                // Check the precedence to see if we should "take" this operator
-                // - For left associative operator (all operator but **), consume the operator,
-                //   recursively call the function below, and parse binaryExpression as a rightOperand
-                //   of the caller if the new precedence of the operator is greater then or equal to the current precedence.
-                //   For example:
-                //      a - b - c;
-                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
-                //      a * b - c
-                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
-                //      a - b * c;
-                //            ^token; leftOperand = b. Return b * c to the caller as a rightOperand
-                // - For right associative operator (**), consume the operator, recursively call the function
-                //   and parse binaryExpression as a rightOperand of the caller if the new precedence of
-                //   the operator is strictly grater than the current precedence
-                //   For example:
-                //      a ** b ** c;
-                //             ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
-                //      a - b ** c;
-                //            ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
-                //      a ** b - c
-                //             ^token; leftOperand = b. Return b to the caller as a rightOperand
-                var consumeCurrentOperator = token === 38 /* AsteriskAsteriskToken */ ?
-                    newPrecedence >= precedence :
-                    newPrecedence > precedence;
-                if (!consumeCurrentOperator) {
-                    break;
-                }
-                if (token === 90 /* InKeyword */ && inDisallowInContext()) {
-                    break;
-                }
-                if (token === 116 /* AsKeyword */) {
-                    // Make sure we *do* perform ASI for constructs like this:
-                    //    var x = foo
-                    //    as (Bar)
-                    // This should be parsed as an initialized variable, followed
-                    // by a function call to 'as' with the argument 'Bar'
-                    if (scanner.hasPrecedingLineBreak()) {
-                        break;
-                    }
-                    else {
-                        nextToken();
-                        leftOperand = makeAsExpression(leftOperand, parseType());
-                    }
-                }
-                else {
-                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
-                }
-            }
-            return leftOperand;
-        }
-        function isBinaryOperator() {
-            if (inDisallowInContext() && token === 90 /* InKeyword */) {
-                return false;
-            }
-            return getBinaryOperatorPrecedence() > 0;
-        }
-        function getBinaryOperatorPrecedence() {
-            switch (token) {
-                case 52 /* BarBarToken */:
-                    return 1;
-                case 51 /* AmpersandAmpersandToken */:
-                    return 2;
-                case 47 /* BarToken */:
-                    return 3;
-                case 48 /* CaretToken */:
-                    return 4;
-                case 46 /* AmpersandToken */:
-                    return 5;
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                    return 6;
-                case 25 /* LessThanToken */:
-                case 27 /* GreaterThanToken */:
-                case 28 /* LessThanEqualsToken */:
-                case 29 /* GreaterThanEqualsToken */:
-                case 91 /* InstanceOfKeyword */:
-                case 90 /* InKeyword */:
-                case 116 /* AsKeyword */:
-                    return 7;
-                case 43 /* LessThanLessThanToken */:
-                case 44 /* GreaterThanGreaterThanToken */:
-                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                    return 8;
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                    return 9;
-                case 37 /* AsteriskToken */:
-                case 39 /* SlashToken */:
-                case 40 /* PercentToken */:
-                    return 10;
-                case 38 /* AsteriskAsteriskToken */:
-                    return 11;
-            }
-            // -1 is lower than all other precedences.  Returning it will cause binary expression
-            // parsing to stop.
-            return -1;
-        }
-        function makeBinaryExpression(left, operatorToken, right) {
-            var node = createNode(187 /* BinaryExpression */, left.pos);
-            node.left = left;
-            node.operatorToken = operatorToken;
-            node.right = right;
-            return finishNode(node);
-        }
-        function makeAsExpression(left, right) {
-            var node = createNode(195 /* AsExpression */, left.pos);
-            node.expression = left;
-            node.type = right;
-            return finishNode(node);
-        }
-        function parsePrefixUnaryExpression() {
-            var node = createNode(185 /* PrefixUnaryExpression */);
-            node.operator = token;
-            nextToken();
-            node.operand = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseDeleteExpression() {
-            var node = createNode(181 /* DeleteExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseTypeOfExpression() {
-            var node = createNode(182 /* TypeOfExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseVoidExpression() {
-            var node = createNode(183 /* VoidExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function isAwaitExpression() {
-            if (token === 119 /* AwaitKeyword */) {
-                if (inAwaitContext()) {
-                    return true;
-                }
-                // here we are using similar heuristics as 'isYieldExpression'
-                return lookAhead(nextTokenIsIdentifierOnSameLine);
-            }
-            return false;
-        }
-        function parseAwaitExpression() {
-            var node = createNode(184 /* AwaitExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        /**
-         * Parse ES7 unary expression and await expression
-         *
-         * ES7 UnaryExpression:
-         *      1) SimpleUnaryExpression[?yield]
-         *      2) IncrementExpression[?yield] ** UnaryExpression[?yield]
-         */
-        function parseUnaryExpressionOrHigher() {
-            if (isAwaitExpression()) {
-                return parseAwaitExpression();
-            }
-            if (isIncrementExpression()) {
-                var incrementExpression = parseIncrementExpression();
-                return token === 38 /* AsteriskAsteriskToken */ ?
-                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), incrementExpression) :
-                    incrementExpression;
-            }
-            var unaryOperator = token;
-            var simpleUnaryExpression = parseSimpleUnaryExpression();
-            if (token === 38 /* AsteriskAsteriskToken */) {
-                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
-                if (simpleUnaryExpression.kind === 177 /* TypeAssertionExpression */) {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
-                }
-                else {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
-                }
-            }
-            return simpleUnaryExpression;
-        }
-        /**
-         * Parse ES7 simple-unary expression or higher:
-         *
-         * ES7 SimpleUnaryExpression:
-         *      1) IncrementExpression[?yield]
-         *      2) delete UnaryExpression[?yield]
-         *      3) void UnaryExpression[?yield]
-         *      4) typeof UnaryExpression[?yield]
-         *      5) + UnaryExpression[?yield]
-         *      6) - UnaryExpression[?yield]
-         *      7) ~ UnaryExpression[?yield]
-         *      8) ! UnaryExpression[?yield]
-         */
-        function parseSimpleUnaryExpression() {
-            switch (token) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                    return parsePrefixUnaryExpression();
-                case 78 /* DeleteKeyword */:
-                    return parseDeleteExpression();
-                case 101 /* TypeOfKeyword */:
-                    return parseTypeOfExpression();
-                case 103 /* VoidKeyword */:
-                    return parseVoidExpression();
-                case 25 /* LessThanToken */:
-                    // This is modified UnaryExpression grammar in TypeScript
-                    //  UnaryExpression (modified):
-                    //      < type > UnaryExpression
-                    return parseTypeAssertion();
-                default:
-                    return parseIncrementExpression();
-            }
-        }
-        /**
-         * Check if the current token can possibly be an ES7 increment expression.
-         *
-         * ES7 IncrementExpression:
-         *      LeftHandSideExpression[?Yield]
-         *      LeftHandSideExpression[?Yield][no LineTerminator here]++
-         *      LeftHandSideExpression[?Yield][no LineTerminator here]--
-         *      ++LeftHandSideExpression[?Yield]
-         *      --LeftHandSideExpression[?Yield]
-         */
-        function isIncrementExpression() {
-            // This function is called inside parseUnaryExpression to decide
-            // whether to call parseSimpleUnaryExpression or call parseIncrementExpression directly
-            switch (token) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                case 78 /* DeleteKeyword */:
-                case 101 /* TypeOfKeyword */:
-                case 103 /* VoidKeyword */:
-                    return false;
-                case 25 /* LessThanToken */:
-                    // If we are not in JSX context, we are parsing TypeAssertion which is an UnaryExpression
-                    if (sourceFile.languageVariant !== 1 /* JSX */) {
-                        return false;
-                    }
-                // We are in JSX context and the token is part of JSXElement.
-                // Fall through
-                default:
-                    return true;
-            }
-        }
-        /**
-         * Parse ES7 IncrementExpression. IncrementExpression is used instead of ES6's PostFixExpression.
-         *
-         * ES7 IncrementExpression[yield]:
-         *      1) LeftHandSideExpression[?yield]
-         *      2) LeftHandSideExpression[?yield] [[no LineTerminator here]]++
-         *      3) LeftHandSideExpression[?yield] [[no LineTerminator here]]--
-         *      4) ++LeftHandSideExpression[?yield]
-         *      5) --LeftHandSideExpression[?yield]
-         * In TypeScript (2), (3) are parsed as PostfixUnaryExpression. (4), (5) are parsed as PrefixUnaryExpression
-         */
-        function parseIncrementExpression() {
-            if (token === 41 /* PlusPlusToken */ || token === 42 /* MinusMinusToken */) {
-                var node = createNode(185 /* PrefixUnaryExpression */);
-                node.operator = token;
-                nextToken();
-                node.operand = parseLeftHandSideExpressionOrHigher();
-                return finishNode(node);
-            }
-            else if (sourceFile.languageVariant === 1 /* JSX */ && token === 25 /* LessThanToken */ && lookAhead(nextTokenIsIdentifierOrKeyword)) {
-                // JSXElement is part of primaryExpression
-                return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true);
-            }
-            var expression = parseLeftHandSideExpressionOrHigher();
-            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
-            if ((token === 41 /* PlusPlusToken */ || token === 42 /* MinusMinusToken */) && !scanner.hasPrecedingLineBreak()) {
-                var node = createNode(186 /* PostfixUnaryExpression */, expression.pos);
-                node.operand = expression;
-                node.operator = token;
-                nextToken();
-                return finishNode(node);
-            }
-            return expression;
-        }
-        function parseLeftHandSideExpressionOrHigher() {
-            // Original Ecma:
-            // LeftHandSideExpression: See 11.2
-            //      NewExpression
-            //      CallExpression
-            //
-            // Our simplification:
-            //
-            // LeftHandSideExpression: See 11.2
-            //      MemberExpression
-            //      CallExpression
-            //
-            // See comment in parseMemberExpressionOrHigher on how we replaced NewExpression with
-            // MemberExpression to make our lives easier.
-            //
-            // to best understand the below code, it's important to see how CallExpression expands
-            // out into its own productions:
-            //
-            // CallExpression:
-            //      MemberExpression Arguments
-            //      CallExpression Arguments
-            //      CallExpression[Expression]
-            //      CallExpression.IdentifierName
-            //      super   (   ArgumentListopt   )
-            //      super.IdentifierName
-            //
-            // Because of the recursion in these calls, we need to bottom out first.  There are two
-            // bottom out states we can run into.  Either we see 'super' which must start either of
-            // the last two CallExpression productions.  Or we have a MemberExpression which either
-            // completes the LeftHandSideExpression, or starts the beginning of the first four
-            // CallExpression productions.
-            var expression = token === 95 /* SuperKeyword */
-                ? parseSuperExpression()
-                : parseMemberExpressionOrHigher();
-            // Now, we *may* be complete.  However, we might have consumed the start of a
-            // CallExpression.  As such, we need to consume the rest of it here to be complete.
-            return parseCallExpressionRest(expression);
-        }
-        function parseMemberExpressionOrHigher() {
-            // Note: to make our lives simpler, we decompose the the NewExpression productions and
-            // place ObjectCreationExpression and FunctionExpression into PrimaryExpression.
-            // like so:
-            //
-            //   PrimaryExpression : See 11.1
-            //      this
-            //      Identifier
-            //      Literal
-            //      ArrayLiteral
-            //      ObjectLiteral
-            //      (Expression)
-            //      FunctionExpression
-            //      new MemberExpression Arguments?
-            //
-            //   MemberExpression : See 11.2
-            //      PrimaryExpression
-            //      MemberExpression[Expression]
-            //      MemberExpression.IdentifierName
-            //
-            //   CallExpression : See 11.2
-            //      MemberExpression
-            //      CallExpression Arguments
-            //      CallExpression[Expression]
-            //      CallExpression.IdentifierName
-            //
-            // Technically this is ambiguous.  i.e. CallExpression defines:
-            //
-            //   CallExpression:
-            //      CallExpression Arguments
-            //
-            // If you see: "new Foo()"
-            //
-            // Then that could be treated as a single ObjectCreationExpression, or it could be
-            // treated as the invocation of "new Foo".  We disambiguate that in code (to match
-            // the original grammar) by making sure that if we see an ObjectCreationExpression
-            // we always consume arguments if they are there. So we treat "new Foo()" as an
-            // object creation only, and not at all as an invocation)  Another way to think
-            // about this is that for every "new" that we see, we will consume an argument list if
-            // it is there as part of the *associated* object creation node.  Any additional
-            // argument lists we see, will become invocation expressions.
-            //
-            // Because there are no other places in the grammar now that refer to FunctionExpression
-            // or ObjectCreationExpression, it is safe to push down into the PrimaryExpression
-            // production.
-            //
-            // Because CallExpression and MemberExpression are left recursive, we need to bottom out
-            // of the recursion immediately.  So we parse out a primary expression to start with.
-            var expression = parsePrimaryExpression();
-            return parseMemberExpressionRest(expression);
-        }
-        function parseSuperExpression() {
-            var expression = parseTokenNode();
-            if (token === 17 /* OpenParenToken */ || token === 21 /* DotToken */ || token === 19 /* OpenBracketToken */) {
-                return expression;
-            }
-            // If we have seen "super" it must be followed by '(' or '.'.
-            // If it wasn't then just try to parse out a '.' and report an error.
-            var node = createNode(172 /* PropertyAccessExpression */, expression.pos);
-            node.expression = expression;
-            node.dotToken = parseExpectedToken(21 /* DotToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
-            node.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
-            return finishNode(node);
-        }
-        function tagNamesAreEquivalent(lhs, rhs) {
-            if (lhs.kind !== rhs.kind) {
-                return false;
-            }
-            if (lhs.kind === 69 /* Identifier */) {
-                return lhs.text === rhs.text;
-            }
-            return lhs.right.text === rhs.right.text &&
-                tagNamesAreEquivalent(lhs.left, rhs.left);
-        }
-        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
-            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
-            var result;
-            if (opening.kind === 243 /* JsxOpeningElement */) {
-                var node = createNode(241 /* JsxElement */, opening.pos);
-                node.openingElement = opening;
-                node.children = parseJsxChildren(node.openingElement.tagName);
-                node.closingElement = parseJsxClosingElement(inExpressionContext);
-                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
-                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
-                }
-                result = finishNode(node);
-            }
-            else {
-                ts.Debug.assert(opening.kind === 242 /* JsxSelfClosingElement */);
-                // Nothing else to do for self-closing elements
-                result = opening;
-            }
-            // If the user writes the invalid code '<div></div><div></div>' in an expression context (i.e. not wrapped in
-            // an enclosing tag), we'll naively try to parse   ^ this as a 'less than' operator and the remainder of the tag
-            // as garbage, which will cause the formatter to badly mangle the JSX. Perform a speculative parse of a JSX
-            // element if we see a < token so that we can wrap it in a synthetic binary expression so the formatter
-            // does less damage and we can report a better error.
-            // Since JSX elements are invalid < operands anyway, this lookahead parse will only occur in error scenarios
-            // of one sort or another.
-            if (inExpressionContext && token === 25 /* LessThanToken */) {
-                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true); });
-                if (invalidElement) {
-                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
-                    var badNode = createNode(187 /* BinaryExpression */, result.pos);
-                    badNode.end = invalidElement.end;
-                    badNode.left = result;
-                    badNode.right = invalidElement;
-                    badNode.operatorToken = createMissingNode(24 /* CommaToken */, /*reportAtCurrentPosition*/ false, /*diagnosticMessage*/ undefined);
-                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
-                    return badNode;
-                }
-            }
-            return result;
-        }
-        function parseJsxText() {
-            var node = createNode(244 /* JsxText */, scanner.getStartPos());
-            token = scanner.scanJsxToken();
-            return finishNode(node);
-        }
-        function parseJsxChild() {
-            switch (token) {
-                case 244 /* JsxText */:
-                    return parseJsxText();
-                case 15 /* OpenBraceToken */:
-                    return parseJsxExpression(/*inExpressionContext*/ false);
-                case 25 /* LessThanToken */:
-                    return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ false);
-            }
-            ts.Debug.fail("Unknown JSX child kind " + token);
-        }
-        function parseJsxChildren(openingTagName) {
-            var result = [];
-            result.pos = scanner.getStartPos();
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << 14 /* JsxChildren */;
-            while (true) {
-                token = scanner.reScanJsxToken();
-                if (token === 26 /* LessThanSlashToken */) {
-                    // Closing tag
-                    break;
-                }
-                else if (token === 1 /* EndOfFileToken */) {
-                    // If we hit EOF, issue the error at the tag that lacks the closing element
-                    // rather than at the end of the file (which is useless)
-                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
-                    break;
-                }
-                result.push(parseJsxChild());
-            }
-            result.end = scanner.getTokenPos();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
-            var fullStart = scanner.getStartPos();
-            parseExpected(25 /* LessThanToken */);
-            var tagName = parseJsxElementName();
-            var attributes = parseList(13 /* JsxAttributes */, parseJsxAttribute);
-            var node;
-            if (token === 27 /* GreaterThanToken */) {
-                // Closing tag, so scan the immediately-following text with the JSX scanning instead
-                // of regular scanning to avoid treating illegal characters (e.g. '#') as immediate
-                // scanning errors
-                node = createNode(243 /* JsxOpeningElement */, fullStart);
-                scanJsxText();
-            }
-            else {
-                parseExpected(39 /* SlashToken */);
-                if (inExpressionContext) {
-                    parseExpected(27 /* GreaterThanToken */);
-                }
-                else {
-                    parseExpected(27 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
-                    scanJsxText();
-                }
-                node = createNode(242 /* JsxSelfClosingElement */, fullStart);
-            }
-            node.tagName = tagName;
-            node.attributes = attributes;
-            return finishNode(node);
-        }
-        function parseJsxElementName() {
-            scanJsxIdentifier();
-            var elementName = parseIdentifierName();
-            while (parseOptional(21 /* DotToken */)) {
-                scanJsxIdentifier();
-                var node = createNode(139 /* QualifiedName */, elementName.pos); // !!!
-                node.left = elementName;
-                node.right = parseIdentifierName();
-                elementName = finishNode(node);
-            }
-            return elementName;
-        }
-        function parseJsxExpression(inExpressionContext) {
-            var node = createNode(248 /* JsxExpression */);
-            parseExpected(15 /* OpenBraceToken */);
-            if (token !== 16 /* CloseBraceToken */) {
-                node.expression = parseAssignmentExpressionOrHigher();
-            }
-            if (inExpressionContext) {
-                parseExpected(16 /* CloseBraceToken */);
-            }
-            else {
-                parseExpected(16 /* CloseBraceToken */, /*message*/ undefined, /*shouldAdvance*/ false);
-                scanJsxText();
-            }
-            return finishNode(node);
-        }
-        function parseJsxAttribute() {
-            if (token === 15 /* OpenBraceToken */) {
-                return parseJsxSpreadAttribute();
-            }
-            scanJsxIdentifier();
-            var node = createNode(246 /* JsxAttribute */);
-            node.name = parseIdentifierName();
-            if (parseOptional(56 /* EqualsToken */)) {
-                switch (token) {
-                    case 9 /* StringLiteral */:
-                        node.initializer = parseLiteralNode();
-                        break;
-                    default:
-                        node.initializer = parseJsxExpression(/*inExpressionContext*/ true);
-                        break;
-                }
-            }
-            return finishNode(node);
-        }
-        function parseJsxSpreadAttribute() {
-            var node = createNode(247 /* JsxSpreadAttribute */);
-            parseExpected(15 /* OpenBraceToken */);
-            parseExpected(22 /* DotDotDotToken */);
-            node.expression = parseExpression();
-            parseExpected(16 /* CloseBraceToken */);
-            return finishNode(node);
-        }
-        function parseJsxClosingElement(inExpressionContext) {
-            var node = createNode(245 /* JsxClosingElement */);
-            parseExpected(26 /* LessThanSlashToken */);
-            node.tagName = parseJsxElementName();
-            if (inExpressionContext) {
-                parseExpected(27 /* GreaterThanToken */);
-            }
-            else {
-                parseExpected(27 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
-                scanJsxText();
-            }
-            return finishNode(node);
-        }
-        function parseTypeAssertion() {
-            var node = createNode(177 /* TypeAssertionExpression */);
-            parseExpected(25 /* LessThanToken */);
-            node.type = parseType();
-            parseExpected(27 /* GreaterThanToken */);
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseMemberExpressionRest(expression) {
-            while (true) {
-                var dotToken = parseOptionalToken(21 /* DotToken */);
-                if (dotToken) {
-                    var propertyAccess = createNode(172 /* PropertyAccessExpression */, expression.pos);
-                    propertyAccess.expression = expression;
-                    propertyAccess.dotToken = dotToken;
-                    propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
-                    expression = finishNode(propertyAccess);
-                    continue;
-                }
-                if (token === 49 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
-                    nextToken();
-                    var nonNullExpression = createNode(196 /* NonNullExpression */, expression.pos);
-                    nonNullExpression.expression = expression;
-                    expression = finishNode(nonNullExpression);
-                    continue;
-                }
-                // when in the [Decorator] context, we do not parse ElementAccess as it could be part of a ComputedPropertyName
-                if (!inDecoratorContext() && parseOptional(19 /* OpenBracketToken */)) {
-                    var indexedAccess = createNode(173 /* ElementAccessExpression */, expression.pos);
-                    indexedAccess.expression = expression;
-                    // It's not uncommon for a user to write: "new Type[]".
-                    // Check for that common pattern and report a better error message.
-                    if (token !== 20 /* CloseBracketToken */) {
-                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
-                        if (indexedAccess.argumentExpression.kind === 9 /* StringLiteral */ || indexedAccess.argumentExpression.kind === 8 /* NumericLiteral */) {
-                            var literal = indexedAccess.argumentExpression;
-                            literal.text = internIdentifier(literal.text);
-                        }
-                    }
-                    parseExpected(20 /* CloseBracketToken */);
-                    expression = finishNode(indexedAccess);
-                    continue;
-                }
-                if (token === 11 /* NoSubstitutionTemplateLiteral */ || token === 12 /* TemplateHead */) {
-                    var tagExpression = createNode(176 /* TaggedTemplateExpression */, expression.pos);
-                    tagExpression.tag = expression;
-                    tagExpression.template = token === 11 /* NoSubstitutionTemplateLiteral */
-                        ? parseLiteralNode()
-                        : parseTemplateExpression();
-                    expression = finishNode(tagExpression);
-                    continue;
-                }
-                return expression;
-            }
-        }
-        function parseCallExpressionRest(expression) {
-            while (true) {
-                expression = parseMemberExpressionRest(expression);
-                if (token === 25 /* LessThanToken */) {
-                    // See if this is the start of a generic invocation.  If so, consume it and
-                    // keep checking for postfix expressions.  Otherwise, it's just a '<' that's
-                    // part of an arithmetic expression.  Break out so we consume it higher in the
-                    // stack.
-                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
-                    if (!typeArguments) {
-                        return expression;
-                    }
-                    var callExpr = createNode(174 /* CallExpression */, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.typeArguments = typeArguments;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
-                }
-                else if (token === 17 /* OpenParenToken */) {
-                    var callExpr = createNode(174 /* CallExpression */, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
-                }
-                return expression;
-            }
-        }
-        function parseArgumentList() {
-            parseExpected(17 /* OpenParenToken */);
-            var result = parseDelimitedList(11 /* ArgumentExpressions */, parseArgumentExpression);
-            parseExpected(18 /* CloseParenToken */);
-            return result;
-        }
-        function parseTypeArgumentsInExpression() {
-            if (!parseOptional(25 /* LessThanToken */)) {
-                return undefined;
-            }
-            var typeArguments = parseDelimitedList(18 /* TypeArguments */, parseType);
-            if (!parseExpected(27 /* GreaterThanToken */)) {
-                // If it doesn't have the closing >  then it's definitely not an type argument list.
-                return undefined;
-            }
-            // If we have a '<', then only parse this as a argument list if the type arguments
-            // are complete and we have an open paren.  if we don't, rewind and return nothing.
-            return typeArguments && canFollowTypeArgumentsInExpression()
-                ? typeArguments
-                : undefined;
-        }
-        function canFollowTypeArgumentsInExpression() {
-            switch (token) {
-                case 17 /* OpenParenToken */: // foo<x>(
-                // this case are the only case where this token can legally follow a type argument
-                // list.  So we definitely want to treat this as a type arg list.
-                case 21 /* DotToken */: // foo<x>.
-                case 18 /* CloseParenToken */: // foo<x>)
-                case 20 /* CloseBracketToken */: // foo<x>]
-                case 54 /* ColonToken */: // foo<x>:
-                case 23 /* SemicolonToken */: // foo<x>;
-                case 53 /* QuestionToken */: // foo<x>?
-                case 30 /* EqualsEqualsToken */: // foo<x> ==
-                case 32 /* EqualsEqualsEqualsToken */: // foo<x> ===
-                case 31 /* ExclamationEqualsToken */: // foo<x> !=
-                case 33 /* ExclamationEqualsEqualsToken */: // foo<x> !==
-                case 51 /* AmpersandAmpersandToken */: // foo<x> &&
-                case 52 /* BarBarToken */: // foo<x> ||
-                case 48 /* CaretToken */: // foo<x> ^
-                case 46 /* AmpersandToken */: // foo<x> &
-                case 47 /* BarToken */: // foo<x> |
-                case 16 /* CloseBraceToken */: // foo<x> }
-                case 1 /* EndOfFileToken */:
-                    // these cases can't legally follow a type arg list.  However, they're not legal
-                    // expressions either.  The user is probably in the middle of a generic type. So
-                    // treat it as such.
-                    return true;
-                case 24 /* CommaToken */: // foo<x>,
-                case 15 /* OpenBraceToken */: // foo<x> {
-                // We don't want to treat these as type arguments.  Otherwise we'll parse this
-                // as an invocation expression.  Instead, we want to parse out the expression
-                // in isolation from the type arguments.
-                default:
-                    // Anything else treat as an expression.
-                    return false;
-            }
-        }
-        function parsePrimaryExpression() {
-            switch (token) {
-                case 8 /* NumericLiteral */:
-                case 9 /* StringLiteral */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                    return parseLiteralNode();
-                case 97 /* ThisKeyword */:
-                case 95 /* SuperKeyword */:
-                case 93 /* NullKeyword */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                    return parseTokenNode();
-                case 17 /* OpenParenToken */:
-                    return parseParenthesizedExpression();
-                case 19 /* OpenBracketToken */:
-                    return parseArrayLiteralExpression();
-                case 15 /* OpenBraceToken */:
-                    return parseObjectLiteralExpression();
-                case 118 /* AsyncKeyword */:
-                    // Async arrow functions are parsed earlier in parseAssignmentExpressionOrHigher.
-                    // If we encounter `async [no LineTerminator here] function` then this is an async
-                    // function; otherwise, its an identifier.
-                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
-                        break;
-                    }
-                    return parseFunctionExpression();
-                case 73 /* ClassKeyword */:
-                    return parseClassExpression();
-                case 87 /* FunctionKeyword */:
-                    return parseFunctionExpression();
-                case 92 /* NewKeyword */:
-                    return parseNewExpression();
-                case 39 /* SlashToken */:
-                case 61 /* SlashEqualsToken */:
-                    if (reScanSlashToken() === 10 /* RegularExpressionLiteral */) {
-                        return parseLiteralNode();
-                    }
-                    break;
-                case 12 /* TemplateHead */:
-                    return parseTemplateExpression();
-            }
-            return parseIdentifier(ts.Diagnostics.Expression_expected);
-        }
-        function parseParenthesizedExpression() {
-            var node = createNode(178 /* ParenthesizedExpression */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            return finishNode(node);
-        }
-        function parseSpreadElement() {
-            var node = createNode(191 /* SpreadElementExpression */);
-            parseExpected(22 /* DotDotDotToken */);
-            node.expression = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
-        }
-        function parseArgumentOrArrayLiteralElement() {
-            return token === 22 /* DotDotDotToken */ ? parseSpreadElement() :
-                token === 24 /* CommaToken */ ? createNode(193 /* OmittedExpression */) :
-                    parseAssignmentExpressionOrHigher();
-        }
-        function parseArgumentExpression() {
-            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
-        }
-        function parseArrayLiteralExpression() {
-            var node = createNode(170 /* ArrayLiteralExpression */);
-            parseExpected(19 /* OpenBracketToken */);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.elements = parseDelimitedList(15 /* ArrayLiteralMembers */, parseArgumentOrArrayLiteralElement);
-            parseExpected(20 /* CloseBracketToken */);
-            return finishNode(node);
-        }
-        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
-            if (parseContextualModifier(123 /* GetKeyword */)) {
-                return addJSDocComment(parseAccessorDeclaration(149 /* GetAccessor */, fullStart, decorators, modifiers));
-            }
-            else if (parseContextualModifier(131 /* SetKeyword */)) {
-                return parseAccessorDeclaration(150 /* SetAccessor */, fullStart, decorators, modifiers);
-            }
-            return undefined;
-        }
-        function parseObjectLiteralElement() {
-            var fullStart = scanner.getStartPos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
-            }
-            var asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            // Disallowing of optional property assignments happens in the grammar checker.
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (asteriskToken || token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
-            }
-            // check if it is short-hand property assignment or normal property assignment
-            // NOTE: if token is EqualsToken it is interpreted as CoverInitializedName production
-            // CoverInitializedName[Yield] :
-            //     IdentifierReference[?Yield] Initializer[In, ?Yield]
-            // this is necessary because ObjectLiteral productions are also used to cover grammar for ObjectAssignmentPattern
-            var isShorthandPropertyAssignment = tokenIsIdentifier && (token === 24 /* CommaToken */ || token === 16 /* CloseBraceToken */ || token === 56 /* EqualsToken */);
-            if (isShorthandPropertyAssignment) {
-                var shorthandDeclaration = createNode(254 /* ShorthandPropertyAssignment */, fullStart);
-                shorthandDeclaration.name = propertyName;
-                shorthandDeclaration.questionToken = questionToken;
-                var equalsToken = parseOptionalToken(56 /* EqualsToken */);
-                if (equalsToken) {
-                    shorthandDeclaration.equalsToken = equalsToken;
-                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                }
-                return addJSDocComment(finishNode(shorthandDeclaration));
-            }
-            else {
-                var propertyAssignment = createNode(253 /* PropertyAssignment */, fullStart);
-                propertyAssignment.modifiers = modifiers;
-                propertyAssignment.name = propertyName;
-                propertyAssignment.questionToken = questionToken;
-                parseExpected(54 /* ColonToken */);
-                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                return addJSDocComment(finishNode(propertyAssignment));
-            }
-        }
-        function parseObjectLiteralExpression() {
-            var node = createNode(171 /* ObjectLiteralExpression */);
-            parseExpected(15 /* OpenBraceToken */);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.properties = parseDelimitedList(12 /* ObjectLiteralMembers */, parseObjectLiteralElement, /*considerSemicolonAsDelimiter*/ true);
-            parseExpected(16 /* CloseBraceToken */);
-            return finishNode(node);
-        }
-        function parseFunctionExpression() {
-            // GeneratorExpression:
-            //      function* BindingIdentifier [Yield][opt](FormalParameters[Yield]){ GeneratorBody }
-            //
-            // FunctionExpression:
-            //      function BindingIdentifier[opt](FormalParameters){ FunctionBody }
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
-            }
-            var node = createNode(179 /* FunctionExpression */);
-            setModifiers(node, parseModifiers());
-            parseExpected(87 /* FunctionKeyword */);
-            node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = !!(node.flags & 256 /* Async */);
-            node.name =
-                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
-                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
-                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
-                            parseOptionalIdentifier();
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlock(/*allowYield*/ isGenerator, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
-            }
-            return addJSDocComment(finishNode(node));
-        }
-        function parseOptionalIdentifier() {
-            return isIdentifier() ? parseIdentifier() : undefined;
-        }
-        function parseNewExpression() {
-            var node = createNode(175 /* NewExpression */);
-            parseExpected(92 /* NewKeyword */);
-            node.expression = parseMemberExpressionOrHigher();
-            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
-            if (node.typeArguments || token === 17 /* OpenParenToken */) {
-                node.arguments = parseArgumentList();
-            }
-            return finishNode(node);
-        }
-        // STATEMENTS
-        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
-            var node = createNode(199 /* Block */);
-            if (parseExpected(15 /* OpenBraceToken */, diagnosticMessage) || ignoreMissingOpenBrace) {
-                node.statements = parseList(1 /* BlockStatements */, parseStatement);
-                parseExpected(16 /* CloseBraceToken */);
-            }
-            else {
-                node.statements = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
-            var savedYieldContext = inYieldContext();
-            setYieldContext(allowYield);
-            var savedAwaitContext = inAwaitContext();
-            setAwaitContext(allowAwait);
-            // We may be in a [Decorator] context when parsing a function expression or
-            // arrow function. The body of the function is not in [Decorator] context.
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
-            }
-            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
-            }
-            setYieldContext(savedYieldContext);
-            setAwaitContext(savedAwaitContext);
-            return block;
-        }
-        function parseEmptyStatement() {
-            var node = createNode(201 /* EmptyStatement */);
-            parseExpected(23 /* SemicolonToken */);
-            return finishNode(node);
-        }
-        function parseIfStatement() {
-            var node = createNode(203 /* IfStatement */);
-            parseExpected(88 /* IfKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            node.thenStatement = parseStatement();
-            node.elseStatement = parseOptional(80 /* ElseKeyword */) ? parseStatement() : undefined;
-            return finishNode(node);
-        }
-        function parseDoStatement() {
-            var node = createNode(204 /* DoStatement */);
-            parseExpected(79 /* DoKeyword */);
-            node.statement = parseStatement();
-            parseExpected(104 /* WhileKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            // From: https://mail.mozilla.org/pipermail/es-discuss/2011-August/016188.html
-            // 157 min --- All allen at wirfs-brock.com CONF --- "do{;}while(false)false" prohibited in
-            // spec but allowed in consensus reality. Approved -- this is the de-facto standard whereby
-            //  do;while(0)x will have a semicolon inserted before x.
-            parseOptional(23 /* SemicolonToken */);
-            return finishNode(node);
-        }
-        function parseWhileStatement() {
-            var node = createNode(205 /* WhileStatement */);
-            parseExpected(104 /* WhileKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            node.statement = parseStatement();
-            return finishNode(node);
-        }
-        function parseForOrForInOrForOfStatement() {
-            var pos = getNodePos();
-            parseExpected(86 /* ForKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            var initializer = undefined;
-            if (token !== 23 /* SemicolonToken */) {
-                if (token === 102 /* VarKeyword */ || token === 108 /* LetKeyword */ || token === 74 /* ConstKeyword */) {
-                    initializer = parseVariableDeclarationList(/*inForStatementInitializer*/ true);
-                }
-                else {
-                    initializer = disallowInAnd(parseExpression);
-                }
-            }
-            var forOrForInOrForOfStatement;
-            if (parseOptional(90 /* InKeyword */)) {
-                var forInStatement = createNode(207 /* ForInStatement */, pos);
-                forInStatement.initializer = initializer;
-                forInStatement.expression = allowInAnd(parseExpression);
-                parseExpected(18 /* CloseParenToken */);
-                forOrForInOrForOfStatement = forInStatement;
-            }
-            else if (parseOptional(138 /* OfKeyword */)) {
-                var forOfStatement = createNode(208 /* ForOfStatement */, pos);
-                forOfStatement.initializer = initializer;
-                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
-                parseExpected(18 /* CloseParenToken */);
-                forOrForInOrForOfStatement = forOfStatement;
-            }
-            else {
-                var forStatement = createNode(206 /* ForStatement */, pos);
-                forStatement.initializer = initializer;
-                parseExpected(23 /* SemicolonToken */);
-                if (token !== 23 /* SemicolonToken */ && token !== 18 /* CloseParenToken */) {
-                    forStatement.condition = allowInAnd(parseExpression);
-                }
-                parseExpected(23 /* SemicolonToken */);
-                if (token !== 18 /* CloseParenToken */) {
-                    forStatement.incrementor = allowInAnd(parseExpression);
-                }
-                parseExpected(18 /* CloseParenToken */);
-                forOrForInOrForOfStatement = forStatement;
-            }
-            forOrForInOrForOfStatement.statement = parseStatement();
-            return finishNode(forOrForInOrForOfStatement);
-        }
-        function parseBreakOrContinueStatement(kind) {
-            var node = createNode(kind);
-            parseExpected(kind === 210 /* BreakStatement */ ? 70 /* BreakKeyword */ : 75 /* ContinueKeyword */);
-            if (!canParseSemicolon()) {
-                node.label = parseIdentifier();
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseReturnStatement() {
-            var node = createNode(211 /* ReturnStatement */);
-            parseExpected(94 /* ReturnKeyword */);
-            if (!canParseSemicolon()) {
-                node.expression = allowInAnd(parseExpression);
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseWithStatement() {
-            var node = createNode(212 /* WithStatement */);
-            parseExpected(105 /* WithKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            node.statement = parseStatement();
-            return finishNode(node);
-        }
-        function parseCaseClause() {
-            var node = createNode(249 /* CaseClause */);
-            parseExpected(71 /* CaseKeyword */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(54 /* ColonToken */);
-            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
-            return finishNode(node);
-        }
-        function parseDefaultClause() {
-            var node = createNode(250 /* DefaultClause */);
-            parseExpected(77 /* DefaultKeyword */);
-            parseExpected(54 /* ColonToken */);
-            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
-            return finishNode(node);
-        }
-        function parseCaseOrDefaultClause() {
-            return token === 71 /* CaseKeyword */ ? parseCaseClause() : parseDefaultClause();
-        }
-        function parseSwitchStatement() {
-            var node = createNode(213 /* SwitchStatement */);
-            parseExpected(96 /* SwitchKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            var caseBlock = createNode(227 /* CaseBlock */, scanner.getStartPos());
-            parseExpected(15 /* OpenBraceToken */);
-            caseBlock.clauses = parseList(2 /* SwitchClauses */, parseCaseOrDefaultClause);
-            parseExpected(16 /* CloseBraceToken */);
-            node.caseBlock = finishNode(caseBlock);
-            return finishNode(node);
-        }
-        function parseThrowStatement() {
-            // ThrowStatement[Yield] :
-            //      throw [no LineTerminator here]Expression[In, ?Yield];
-            // Because of automatic semicolon insertion, we need to report error if this
-            // throw could be terminated with a semicolon.  Note: we can't call 'parseExpression'
-            // directly as that might consume an expression on the following line.
-            // We just return 'undefined' in that case.  The actual error will be reported in the
-            // grammar walker.
-            var node = createNode(215 /* ThrowStatement */);
-            parseExpected(98 /* ThrowKeyword */);
-            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
-            parseSemicolon();
-            return finishNode(node);
-        }
-        // TODO: Review for error recovery
-        function parseTryStatement() {
-            var node = createNode(216 /* TryStatement */);
-            parseExpected(100 /* TryKeyword */);
-            node.tryBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
-            node.catchClause = token === 72 /* CatchKeyword */ ? parseCatchClause() : undefined;
-            // If we don't have a catch clause, then we must have a finally clause.  Try to parse
-            // one out no matter what.
-            if (!node.catchClause || token === 85 /* FinallyKeyword */) {
-                parseExpected(85 /* FinallyKeyword */);
-                node.finallyBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
-            }
-            return finishNode(node);
-        }
-        function parseCatchClause() {
-            var result = createNode(252 /* CatchClause */);
-            parseExpected(72 /* CatchKeyword */);
-            if (parseExpected(17 /* OpenParenToken */)) {
-                result.variableDeclaration = parseVariableDeclaration();
-            }
-            parseExpected(18 /* CloseParenToken */);
-            result.block = parseBlock(/*ignoreMissingOpenBrace*/ false);
-            return finishNode(result);
-        }
-        function parseDebuggerStatement() {
-            var node = createNode(217 /* DebuggerStatement */);
-            parseExpected(76 /* DebuggerKeyword */);
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseExpressionOrLabeledStatement() {
-            // Avoiding having to do the lookahead for a labeled statement by just trying to parse
-            // out an expression, seeing if it is identifier and then seeing if it is followed by
-            // a colon.
-            var fullStart = scanner.getStartPos();
-            var expression = allowInAnd(parseExpression);
-            if (expression.kind === 69 /* Identifier */ && parseOptional(54 /* ColonToken */)) {
-                var labeledStatement = createNode(214 /* LabeledStatement */, fullStart);
-                labeledStatement.label = expression;
-                labeledStatement.statement = parseStatement();
-                return addJSDocComment(finishNode(labeledStatement));
-            }
-            else {
-                var expressionStatement = createNode(202 /* ExpressionStatement */, fullStart);
-                expressionStatement.expression = expression;
-                parseSemicolon();
-                return addJSDocComment(finishNode(expressionStatement));
-            }
-        }
-        function nextTokenIsIdentifierOrKeywordOnSameLine() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token) && !scanner.hasPrecedingLineBreak();
-        }
-        function nextTokenIsFunctionKeywordOnSameLine() {
-            nextToken();
-            return token === 87 /* FunctionKeyword */ && !scanner.hasPrecedingLineBreak();
-        }
-        function nextTokenIsIdentifierOrKeywordOrNumberOnSameLine() {
-            nextToken();
-            return (ts.tokenIsIdentifierOrKeyword(token) || token === 8 /* NumericLiteral */) && !scanner.hasPrecedingLineBreak();
-        }
-        function isDeclaration() {
-            while (true) {
-                switch (token) {
-                    case 102 /* VarKeyword */:
-                    case 108 /* LetKeyword */:
-                    case 74 /* ConstKeyword */:
-                    case 87 /* FunctionKeyword */:
-                    case 73 /* ClassKeyword */:
-                    case 81 /* EnumKeyword */:
-                        return true;
-                    // 'declare', 'module', 'namespace', 'interface'* and 'type' are all legal JavaScript identifiers;
-                    // however, an identifier cannot be followed by another identifier on the same line. This is what we
-                    // count on to parse out the respective declarations. For instance, we exploit this to say that
-                    //
-                    //    namespace n
-                    //
-                    // can be none other than the beginning of a namespace declaration, but need to respect that JavaScript sees
-                    //
-                    //    namespace
-                    //    n
-                    //
-                    // as the identifier 'namespace' on one line followed by the identifier 'n' on another.
-                    // We need to look one token ahead to see if it permissible to try parsing a declaration.
-                    //
-                    // *Note*: 'interface' is actually a strict mode reserved word. So while
-                    //
-                    //   "use strict"
-                    //   interface
-                    //   I {}
-                    //
-                    // could be legal, it would add complexity for very little gain.
-                    case 107 /* InterfaceKeyword */:
-                    case 134 /* TypeKeyword */:
-                        return nextTokenIsIdentifierOnSameLine();
-                    case 125 /* ModuleKeyword */:
-                    case 126 /* NamespaceKeyword */:
-                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
-                    case 115 /* AbstractKeyword */:
-                    case 118 /* AsyncKeyword */:
-                    case 122 /* DeclareKeyword */:
-                    case 110 /* PrivateKeyword */:
-                    case 111 /* ProtectedKeyword */:
-                    case 112 /* PublicKeyword */:
-                    case 128 /* ReadonlyKeyword */:
-                        nextToken();
-                        // ASI takes effect for this modifier.
-                        if (scanner.hasPrecedingLineBreak()) {
-                            return false;
-                        }
-                        continue;
-                    case 137 /* GlobalKeyword */:
-                        nextToken();
-                        return token === 15 /* OpenBraceToken */ || token === 69 /* Identifier */ || token === 82 /* ExportKeyword */;
-                    case 89 /* ImportKeyword */:
-                        nextToken();
-                        return token === 9 /* StringLiteral */ || token === 37 /* AsteriskToken */ ||
-                            token === 15 /* OpenBraceToken */ || ts.tokenIsIdentifierOrKeyword(token);
-                    case 82 /* ExportKeyword */:
-                        nextToken();
-                        if (token === 56 /* EqualsToken */ || token === 37 /* AsteriskToken */ ||
-                            token === 15 /* OpenBraceToken */ || token === 77 /* DefaultKeyword */ ||
-                            token === 116 /* AsKeyword */) {
-                            return true;
-                        }
-                        continue;
-                    case 113 /* StaticKeyword */:
-                        nextToken();
-                        continue;
-                    default:
-                        return false;
-                }
-            }
-        }
-        function isStartOfDeclaration() {
-            return lookAhead(isDeclaration);
-        }
-        function isStartOfStatement() {
-            switch (token) {
-                case 55 /* AtToken */:
-                case 23 /* SemicolonToken */:
-                case 15 /* OpenBraceToken */:
-                case 102 /* VarKeyword */:
-                case 108 /* LetKeyword */:
-                case 87 /* FunctionKeyword */:
-                case 73 /* ClassKeyword */:
-                case 81 /* EnumKeyword */:
-                case 88 /* IfKeyword */:
-                case 79 /* DoKeyword */:
-                case 104 /* WhileKeyword */:
-                case 86 /* ForKeyword */:
-                case 75 /* ContinueKeyword */:
-                case 70 /* BreakKeyword */:
-                case 94 /* ReturnKeyword */:
-                case 105 /* WithKeyword */:
-                case 96 /* SwitchKeyword */:
-                case 98 /* ThrowKeyword */:
-                case 100 /* TryKeyword */:
-                case 76 /* DebuggerKeyword */:
-                // 'catch' and 'finally' do not actually indicate that the code is part of a statement,
-                // however, we say they are here so that we may gracefully parse them and error later.
-                case 72 /* CatchKeyword */:
-                case 85 /* FinallyKeyword */:
-                    return true;
-                case 74 /* ConstKeyword */:
-                case 82 /* ExportKeyword */:
-                case 89 /* ImportKeyword */:
-                    return isStartOfDeclaration();
-                case 118 /* AsyncKeyword */:
-                case 122 /* DeclareKeyword */:
-                case 107 /* InterfaceKeyword */:
-                case 125 /* ModuleKeyword */:
-                case 126 /* NamespaceKeyword */:
-                case 134 /* TypeKeyword */:
-                case 137 /* GlobalKeyword */:
-                    // When these don't start a declaration, they're an identifier in an expression statement
-                    return true;
-                case 112 /* PublicKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 113 /* StaticKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                    // When these don't start a declaration, they may be the start of a class member if an identifier
-                    // immediately follows. Otherwise they're an identifier in an expression statement.
-                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                default:
-                    return isStartOfExpression();
-            }
-        }
-        function nextTokenIsIdentifierOrStartOfDestructuring() {
-            nextToken();
-            return isIdentifier() || token === 15 /* OpenBraceToken */ || token === 19 /* OpenBracketToken */;
-        }
-        function isLetDeclaration() {
-            // In ES6 'let' always starts a lexical declaration if followed by an identifier or {
-            // or [.
-            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
-        }
-        function parseStatement() {
-            switch (token) {
-                case 23 /* SemicolonToken */:
-                    return parseEmptyStatement();
-                case 15 /* OpenBraceToken */:
-                    return parseBlock(/*ignoreMissingOpenBrace*/ false);
-                case 102 /* VarKeyword */:
-                    return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                case 108 /* LetKeyword */:
-                    if (isLetDeclaration()) {
-                        return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                    }
-                    break;
-                case 87 /* FunctionKeyword */:
-                    return parseFunctionDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                case 73 /* ClassKeyword */:
-                    return parseClassDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                case 88 /* IfKeyword */:
-                    return parseIfStatement();
-                case 79 /* DoKeyword */:
-                    return parseDoStatement();
-                case 104 /* WhileKeyword */:
-                    return parseWhileStatement();
-                case 86 /* ForKeyword */:
-                    return parseForOrForInOrForOfStatement();
-                case 75 /* ContinueKeyword */:
-                    return parseBreakOrContinueStatement(209 /* ContinueStatement */);
-                case 70 /* BreakKeyword */:
-                    return parseBreakOrContinueStatement(210 /* BreakStatement */);
-                case 94 /* ReturnKeyword */:
-                    return parseReturnStatement();
-                case 105 /* WithKeyword */:
-                    return parseWithStatement();
-                case 96 /* SwitchKeyword */:
-                    return parseSwitchStatement();
-                case 98 /* ThrowKeyword */:
-                    return parseThrowStatement();
-                case 100 /* TryKeyword */:
-                // Include 'catch' and 'finally' for error recovery.
-                case 72 /* CatchKeyword */:
-                case 85 /* FinallyKeyword */:
-                    return parseTryStatement();
-                case 76 /* DebuggerKeyword */:
-                    return parseDebuggerStatement();
-                case 55 /* AtToken */:
-                    return parseDeclaration();
-                case 118 /* AsyncKeyword */:
-                case 107 /* InterfaceKeyword */:
-                case 134 /* TypeKeyword */:
-                case 125 /* ModuleKeyword */:
-                case 126 /* NamespaceKeyword */:
-                case 122 /* DeclareKeyword */:
-                case 74 /* ConstKeyword */:
-                case 81 /* EnumKeyword */:
-                case 82 /* ExportKeyword */:
-                case 89 /* ImportKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 112 /* PublicKeyword */:
-                case 115 /* AbstractKeyword */:
-                case 113 /* StaticKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                case 137 /* GlobalKeyword */:
-                    if (isStartOfDeclaration()) {
-                        return parseDeclaration();
-                    }
-                    break;
-            }
-            return parseExpressionOrLabeledStatement();
-        }
-        function parseDeclaration() {
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            switch (token) {
-                case 102 /* VarKeyword */:
-                case 108 /* LetKeyword */:
-                case 74 /* ConstKeyword */:
-                    return parseVariableStatement(fullStart, decorators, modifiers);
-                case 87 /* FunctionKeyword */:
-                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
-                case 73 /* ClassKeyword */:
-                    return parseClassDeclaration(fullStart, decorators, modifiers);
-                case 107 /* InterfaceKeyword */:
-                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
-                case 134 /* TypeKeyword */:
-                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
-                case 81 /* EnumKeyword */:
-                    return parseEnumDeclaration(fullStart, decorators, modifiers);
-                case 137 /* GlobalKeyword */:
-                case 125 /* ModuleKeyword */:
-                case 126 /* NamespaceKeyword */:
-                    return parseModuleDeclaration(fullStart, decorators, modifiers);
-                case 89 /* ImportKeyword */:
-                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
-                case 82 /* ExportKeyword */:
-                    nextToken();
-                    switch (token) {
-                        case 77 /* DefaultKeyword */:
-                        case 56 /* EqualsToken */:
-                            return parseExportAssignment(fullStart, decorators, modifiers);
-                        case 116 /* AsKeyword */:
-                            return parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers);
-                        default:
-                            return parseExportDeclaration(fullStart, decorators, modifiers);
-                    }
-                default:
-                    if (decorators || modifiers) {
-                        // We reached this point because we encountered decorators and/or modifiers and assumed a declaration
-                        // would follow. For recovery and error reporting purposes, return an incomplete declaration.
-                        var node = createMissingNode(239 /* MissingDeclaration */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
-                        node.pos = fullStart;
-                        node.decorators = decorators;
-                        setModifiers(node, modifiers);
-                        return finishNode(node);
-                    }
-            }
-        }
-        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token === 9 /* StringLiteral */);
-        }
-        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
-            if (token !== 15 /* OpenBraceToken */ && canParseSemicolon()) {
-                parseSemicolon();
-                return;
-            }
-            return parseFunctionBlock(isGenerator, isAsync, /*ignoreMissingOpenBrace*/ false, diagnosticMessage);
-        }
-        // DECLARATIONS
-        function parseArrayBindingElement() {
-            if (token === 24 /* CommaToken */) {
-                return createNode(193 /* OmittedExpression */);
-            }
-            var node = createNode(169 /* BindingElement */);
-            node.dotDotDotToken = parseOptionalToken(22 /* DotDotDotToken */);
-            node.name = parseIdentifierOrPattern();
-            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
-            return finishNode(node);
-        }
-        function parseObjectBindingElement() {
-            var node = createNode(169 /* BindingElement */);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            if (tokenIsIdentifier && token !== 54 /* ColonToken */) {
-                node.name = propertyName;
-            }
-            else {
-                parseExpected(54 /* ColonToken */);
-                node.propertyName = propertyName;
-                node.name = parseIdentifierOrPattern();
-            }
-            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
-            return finishNode(node);
-        }
-        function parseObjectBindingPattern() {
-            var node = createNode(167 /* ObjectBindingPattern */);
-            parseExpected(15 /* OpenBraceToken */);
-            node.elements = parseDelimitedList(9 /* ObjectBindingElements */, parseObjectBindingElement);
-            parseExpected(16 /* CloseBraceToken */);
-            return finishNode(node);
-        }
-        function parseArrayBindingPattern() {
-            var node = createNode(168 /* ArrayBindingPattern */);
-            parseExpected(19 /* OpenBracketToken */);
-            node.elements = parseDelimitedList(10 /* ArrayBindingElements */, parseArrayBindingElement);
-            parseExpected(20 /* CloseBracketToken */);
-            return finishNode(node);
-        }
-        function isIdentifierOrPattern() {
-            return token === 15 /* OpenBraceToken */ || token === 19 /* OpenBracketToken */ || isIdentifier();
-        }
-        function parseIdentifierOrPattern() {
-            if (token === 19 /* OpenBracketToken */) {
-                return parseArrayBindingPattern();
-            }
-            if (token === 15 /* OpenBraceToken */) {
-                return parseObjectBindingPattern();
-            }
-            return parseIdentifier();
-        }
-        function parseVariableDeclaration() {
-            var node = createNode(218 /* VariableDeclaration */);
-            node.name = parseIdentifierOrPattern();
-            node.type = parseTypeAnnotation();
-            if (!isInOrOfKeyword(token)) {
-                node.initializer = parseInitializer(/*inParameter*/ false);
-            }
-            return finishNode(node);
-        }
-        function parseVariableDeclarationList(inForStatementInitializer) {
-            var node = createNode(219 /* VariableDeclarationList */);
-            switch (token) {
-                case 102 /* VarKeyword */:
-                    break;
-                case 108 /* LetKeyword */:
-                    node.flags |= 1024 /* Let */;
-                    break;
-                case 74 /* ConstKeyword */:
-                    node.flags |= 2048 /* Const */;
-                    break;
-                default:
-                    ts.Debug.fail();
-            }
-            nextToken();
-            // The user may have written the following:
-            //
-            //    for (let of X) { }
-            //
-            // In this case, we want to parse an empty declaration list, and then parse 'of'
-            // as a keyword. The reason this is not automatic is that 'of' is a valid identifier.
-            // So we need to look ahead to determine if 'of' should be treated as a keyword in
-            // this context.
-            // The checker will then give an error that there is an empty declaration list.
-            if (token === 138 /* OfKeyword */ && lookAhead(canFollowContextualOfKeyword)) {
-                node.declarations = createMissingList();
-            }
-            else {
-                var savedDisallowIn = inDisallowInContext();
-                setDisallowInContext(inForStatementInitializer);
-                node.declarations = parseDelimitedList(8 /* VariableDeclarations */, parseVariableDeclaration);
-                setDisallowInContext(savedDisallowIn);
-            }
-            return finishNode(node);
-        }
-        function canFollowContextualOfKeyword() {
-            return nextTokenIsIdentifier() && nextToken() === 18 /* CloseParenToken */;
-        }
-        function parseVariableStatement(fullStart, decorators, modifiers) {
-            var node = createNode(200 /* VariableStatement */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.declarationList = parseVariableDeclarationList(/*inForStatementInitializer*/ false);
-            parseSemicolon();
-            return addJSDocComment(finishNode(node));
-        }
-        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(220 /* FunctionDeclaration */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(87 /* FunctionKeyword */);
-            node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            node.name = node.flags & 512 /* Default */ ? parseOptionalIdentifier() : parseIdentifier();
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = !!(node.flags & 256 /* Async */);
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
-        }
-        function parseConstructorDeclaration(pos, decorators, modifiers) {
-            var node = createNode(148 /* Constructor */, pos);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(121 /* ConstructorKeyword */);
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
-        }
-        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
-            var method = createNode(147 /* MethodDeclaration */, fullStart);
-            method.decorators = decorators;
-            setModifiers(method, modifiers);
-            method.asteriskToken = asteriskToken;
-            method.name = name;
-            method.questionToken = questionToken;
-            var isGenerator = !!asteriskToken;
-            var isAsync = !!(method.flags & 256 /* Async */);
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, method);
-            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
-            return addJSDocComment(finishNode(method));
-        }
-        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
-            var property = createNode(145 /* PropertyDeclaration */, fullStart);
-            property.decorators = decorators;
-            setModifiers(property, modifiers);
-            property.name = name;
-            property.questionToken = questionToken;
-            property.type = parseTypeAnnotation();
-            // For instance properties specifically, since they are evaluated inside the constructor,
-            // we do *not * want to parse yield expressions, so we specifically turn the yield context
-            // off. The grammar would look something like this:
-            //
-            //    MemberVariableDeclaration[Yield]:
-            //        AccessibilityModifier_opt   PropertyName   TypeAnnotation_opt   Initializer_opt[In];
-            //        AccessibilityModifier_opt  static_opt  PropertyName   TypeAnnotation_opt   Initializer_opt[In, ?Yield];
-            //
-            // The checker may still error in the static case to explicitly disallow the yield expression.
-            property.initializer = modifiers && modifiers.flags & 32 /* Static */
-                ? allowInAnd(parseNonParameterInitializer)
-                : doOutsideOfContext(8388608 /* YieldContext */ | 4194304 /* DisallowInContext */, parseNonParameterInitializer);
-            parseSemicolon();
-            return finishNode(property);
-        }
-        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
-            var asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            var name = parsePropertyName();
-            // Note: this is not legal as per the grammar.  But we allow it in the parser and
-            // report an error in the grammar checker.
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (asteriskToken || token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
-            }
-            else {
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
-            }
-        }
-        function parseNonParameterInitializer() {
-            return parseInitializer(/*inParameter*/ false);
-        }
-        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.name = parsePropertyName();
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false);
-            return finishNode(node);
-        }
-        function isClassMemberModifier(idToken) {
-            switch (idToken) {
-                case 112 /* PublicKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 113 /* StaticKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-        function isClassMemberStart() {
-            var idToken;
-            if (token === 55 /* AtToken */) {
-                return true;
-            }
-            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier.
-            while (ts.isModifierKind(token)) {
-                idToken = token;
-                // If the idToken is a class modifier (protected, private, public, and static), it is
-                // certain that we are starting to parse class member. This allows better error recovery
-                // Example:
-                //      public foo() ...     // true
-                //      public @dec blah ... // true; we will then report an error later
-                //      export public ...    // true; we will then report an error later
-                if (isClassMemberModifier(idToken)) {
-                    return true;
-                }
-                nextToken();
-            }
-            if (token === 37 /* AsteriskToken */) {
-                return true;
-            }
-            // Try to get the first property-like token following all modifiers.
-            // This can either be an identifier or the 'get' or 'set' keywords.
-            if (isLiteralPropertyName()) {
-                idToken = token;
-                nextToken();
-            }
-            // Index signatures and computed properties are class members; we can parse.
-            if (token === 19 /* OpenBracketToken */) {
-                return true;
-            }
-            // If we were able to get any potential identifier...
-            if (idToken !== undefined) {
-                // If we have a non-keyword identifier, or if we have an accessor, then it's safe to parse.
-                if (!ts.isKeyword(idToken) || idToken === 131 /* SetKeyword */ || idToken === 123 /* GetKeyword */) {
-                    return true;
-                }
-                // If it *is* a keyword, but not an accessor, check a little farther along
-                // to see if it should actually be parsed as a class member.
-                switch (token) {
-                    case 17 /* OpenParenToken */: // Method declaration
-                    case 25 /* LessThanToken */: // Generic Method declaration
-                    case 54 /* ColonToken */: // Type Annotation for declaration
-                    case 56 /* EqualsToken */: // Initializer for declaration
-                    case 53 /* QuestionToken */:
-                        return true;
-                    default:
-                        // Covers
-                        //  - Semicolons     (declaration termination)
-                        //  - Closing braces (end-of-class, must be declaration)
-                        //  - End-of-files   (not valid, but permitted so that it gets caught later on)
-                        //  - Line-breaks    (enabling *automatic semicolon insertion*)
-                        return canParseSemicolon();
-                }
-            }
-            return false;
-        }
-        function parseDecorators() {
-            var decorators;
-            while (true) {
-                var decoratorStart = getNodePos();
-                if (!parseOptional(55 /* AtToken */)) {
-                    break;
-                }
-                if (!decorators) {
-                    decorators = [];
-                    decorators.pos = decoratorStart;
-                }
-                var decorator = createNode(143 /* Decorator */, decoratorStart);
-                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
-                decorators.push(finishNode(decorator));
-            }
-            if (decorators) {
-                decorators.end = getNodeEnd();
-            }
-            return decorators;
-        }
-        /*
-         * There are situations in which a modifier like 'const' will appear unexpectedly, such as on a class member.
-         * In those situations, if we are entirely sure that 'const' is not valid on its own (such as when ASI takes effect
-         * and turns it into a standalone declaration), then it is better to parse it and report an error later.
-         *
-         * In such situations, 'permitInvalidConstAsModifier' should be set to true.
-         */
-        function parseModifiers(permitInvalidConstAsModifier) {
-            var flags = 0;
-            var modifiers;
-            while (true) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token;
-                if (token === 74 /* ConstKeyword */ && permitInvalidConstAsModifier) {
-                    // We need to ensure that any subsequent modifiers appear on the same line
-                    // so that when 'const' is a standalone declaration, we don't issue an error.
-                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
-                        break;
-                    }
-                }
-                else {
-                    if (!parseAnyContextualModifier()) {
-                        break;
-                    }
-                }
-                if (!modifiers) {
-                    modifiers = [];
-                    modifiers.pos = modifierStart;
-                }
-                flags |= ts.modifierToFlag(modifierKind);
-                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
-            }
-            if (modifiers) {
-                modifiers.flags = flags;
-                modifiers.end = scanner.getStartPos();
-            }
-            return modifiers;
-        }
-        function parseModifiersForArrowFunction() {
-            var flags = 0;
-            var modifiers;
-            if (token === 118 /* AsyncKeyword */) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token;
-                nextToken();
-                modifiers = [];
-                modifiers.pos = modifierStart;
-                flags |= ts.modifierToFlag(modifierKind);
-                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
-                modifiers.flags = flags;
-                modifiers.end = scanner.getStartPos();
-            }
-            return modifiers;
-        }
-        function parseClassElement() {
-            if (token === 23 /* SemicolonToken */) {
-                var result = createNode(198 /* SemicolonClassElement */);
-                nextToken();
-                return finishNode(result);
-            }
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers(/*permitInvalidConstAsModifier*/ true);
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
-            }
-            if (token === 121 /* ConstructorKeyword */) {
-                return parseConstructorDeclaration(fullStart, decorators, modifiers);
-            }
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
-            }
-            // It is very important that we check this *after* checking indexers because
-            // the [ token can start an index signature or a computed property name
-            if (ts.tokenIsIdentifierOrKeyword(token) ||
-                token === 9 /* StringLiteral */ ||
-                token === 8 /* NumericLiteral */ ||
-                token === 37 /* AsteriskToken */ ||
-                token === 19 /* OpenBracketToken */) {
-                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
-            }
-            if (decorators || modifiers) {
-                // treat this as a property declaration with a missing name.
-                var name_7 = createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_7, /*questionToken*/ undefined);
-            }
-            // 'isClassMemberStart' should have hinted not to attempt parsing.
-            ts.Debug.fail("Should not have attempted to parse class member declaration.");
-        }
-        function parseClassExpression() {
-            return parseClassDeclarationOrExpression(
-            /*fullStart*/ scanner.getStartPos(), 
-            /*decorators*/ undefined, 
-            /*modifiers*/ undefined, 192 /* ClassExpression */);
-        }
-        function parseClassDeclaration(fullStart, decorators, modifiers) {
-            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 221 /* ClassDeclaration */);
-        }
-        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(73 /* ClassKeyword */);
-            node.name = parseNameOfClassDeclarationOrExpression();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ true);
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                // ClassTail[Yield,Await] : (Modified) See 14.5
-                //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
-                node.members = parseClassMembers();
-                parseExpected(16 /* CloseBraceToken */);
-            }
-            else {
-                node.members = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseNameOfClassDeclarationOrExpression() {
-            // implements is a future reserved word so
-            // 'class implements' might mean either
-            // - class expression with omitted name, 'implements' starts heritage clause
-            // - class with name 'implements'
-            // 'isImplementsClause' helps to disambiguate between these two cases
-            return isIdentifier() && !isImplementsClause()
-                ? parseIdentifier()
-                : undefined;
-        }
-        function isImplementsClause() {
-            return token === 106 /* ImplementsKeyword */ && lookAhead(nextTokenIsIdentifierOrKeyword);
-        }
-        function parseHeritageClauses(isClassHeritageClause) {
-            // ClassTail[Yield,Await] : (Modified) See 14.5
-            //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
-            if (isHeritageClause()) {
-                return parseList(20 /* HeritageClauses */, parseHeritageClause);
-            }
-            return undefined;
-        }
-        function parseHeritageClause() {
-            if (token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */) {
-                var node = createNode(251 /* HeritageClause */);
-                node.token = token;
-                nextToken();
-                node.types = parseDelimitedList(7 /* HeritageClauseElement */, parseExpressionWithTypeArguments);
-                return finishNode(node);
-            }
-            return undefined;
-        }
-        function parseExpressionWithTypeArguments() {
-            var node = createNode(194 /* ExpressionWithTypeArguments */);
-            node.expression = parseLeftHandSideExpressionOrHigher();
-            if (token === 25 /* LessThanToken */) {
-                node.typeArguments = parseBracketedList(18 /* TypeArguments */, parseType, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
-            }
-            return finishNode(node);
-        }
-        function isHeritageClause() {
-            return token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */;
-        }
-        function parseClassMembers() {
-            return parseList(5 /* ClassMembers */, parseClassElement);
-        }
-        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(222 /* InterfaceDeclaration */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(107 /* InterfaceKeyword */);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ false);
-            node.members = parseObjectTypeMembers();
-            return finishNode(node);
-        }
-        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(223 /* TypeAliasDeclaration */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(134 /* TypeKeyword */);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            parseExpected(56 /* EqualsToken */);
-            node.type = parseType();
-            parseSemicolon();
-            return finishNode(node);
-        }
-        // In an ambient declaration, the grammar only allows integer literals as initializers.
-        // In a non-ambient declaration, the grammar allows uninitialized members only in a
-        // ConstantEnumMemberSection, which starts at the beginning of an enum declaration
-        // or any time an integer literal initializer is encountered.
-        function parseEnumMember() {
-            var node = createNode(255 /* EnumMember */, scanner.getStartPos());
-            node.name = parsePropertyName();
-            node.initializer = allowInAnd(parseNonParameterInitializer);
-            return finishNode(node);
-        }
-        function parseEnumDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(224 /* EnumDeclaration */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(81 /* EnumKeyword */);
-            node.name = parseIdentifier();
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                node.members = parseDelimitedList(6 /* EnumMembers */, parseEnumMember);
-                parseExpected(16 /* CloseBraceToken */);
-            }
-            else {
-                node.members = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseModuleBlock() {
-            var node = createNode(226 /* ModuleBlock */, scanner.getStartPos());
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                node.statements = parseList(1 /* BlockStatements */, parseStatement);
-                parseExpected(16 /* CloseBraceToken */);
-            }
-            else {
-                node.statements = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
-            var node = createNode(225 /* ModuleDeclaration */, fullStart);
-            // If we are parsing a dotted namespace name, we want to
-            // propagate the 'Namespace' flag across the names if set.
-            var namespaceFlag = flags & 4096 /* Namespace */;
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.flags |= flags;
-            node.name = parseIdentifier();
-            node.body = parseOptional(21 /* DotToken */)
-                ? parseModuleOrNamespaceDeclaration(getNodePos(), /*decorators*/ undefined, /*modifiers*/ undefined, 1 /* Export */ | namespaceFlag)
-                : parseModuleBlock();
-            return finishNode(node);
-        }
-        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(225 /* ModuleDeclaration */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (token === 137 /* GlobalKeyword */) {
-                // parse 'global' as name of global scope augmentation
-                node.name = parseIdentifier();
-                node.flags |= 131072 /* GlobalAugmentation */;
-            }
-            else {
-                node.name = parseLiteralNode(/*internName*/ true);
-            }
-            node.body = parseModuleBlock();
-            return finishNode(node);
-        }
-        function parseModuleDeclaration(fullStart, decorators, modifiers) {
-            var flags = modifiers ? modifiers.flags : 0;
-            if (token === 137 /* GlobalKeyword */) {
-                // global augmentation
-                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
-            }
-            else if (parseOptional(126 /* NamespaceKeyword */)) {
-                flags |= 4096 /* Namespace */;
-            }
-            else {
-                parseExpected(125 /* ModuleKeyword */);
-                if (token === 9 /* StringLiteral */) {
-                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
-                }
-            }
-            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
-        }
-        function isExternalModuleReference() {
-            return token === 129 /* RequireKeyword */ &&
-                lookAhead(nextTokenIsOpenParen);
-        }
-        function nextTokenIsOpenParen() {
-            return nextToken() === 17 /* OpenParenToken */;
-        }
-        function nextTokenIsSlash() {
-            return nextToken() === 39 /* SlashToken */;
-        }
-        function parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers) {
-            var exportDeclaration = createNode(228 /* NamespaceExportDeclaration */, fullStart);
-            exportDeclaration.decorators = decorators;
-            exportDeclaration.modifiers = modifiers;
-            parseExpected(116 /* AsKeyword */);
-            parseExpected(126 /* NamespaceKeyword */);
-            exportDeclaration.name = parseIdentifier();
-            parseExpected(23 /* SemicolonToken */);
-            return finishNode(exportDeclaration);
-        }
-        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
-            parseExpected(89 /* ImportKeyword */);
-            var afterImportPos = scanner.getStartPos();
-            var identifier;
-            if (isIdentifier()) {
-                identifier = parseIdentifier();
-                if (token !== 24 /* CommaToken */ && token !== 136 /* FromKeyword */) {
-                    // ImportEquals declaration of type:
-                    // import x = require("mod"); or
-                    // import x = M.x;
-                    var importEqualsDeclaration = createNode(229 /* ImportEqualsDeclaration */, fullStart);
-                    importEqualsDeclaration.decorators = decorators;
-                    setModifiers(importEqualsDeclaration, modifiers);
-                    importEqualsDeclaration.name = identifier;
-                    parseExpected(56 /* EqualsToken */);
-                    importEqualsDeclaration.moduleReference = parseModuleReference();
-                    parseSemicolon();
-                    return finishNode(importEqualsDeclaration);
-                }
-            }
-            // Import statement
-            var importDeclaration = createNode(230 /* ImportDeclaration */, fullStart);
-            importDeclaration.decorators = decorators;
-            setModifiers(importDeclaration, modifiers);
-            // ImportDeclaration:
-            //  import ImportClause from ModuleSpecifier ;
-            //  import ModuleSpecifier;
-            if (identifier ||
-                token === 37 /* AsteriskToken */ ||
-                token === 15 /* OpenBraceToken */) {
-                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
-                parseExpected(136 /* FromKeyword */);
-            }
-            importDeclaration.moduleSpecifier = parseModuleSpecifier();
-            parseSemicolon();
-            return finishNode(importDeclaration);
-        }
-        function parseImportClause(identifier, fullStart) {
-            // ImportClause:
-            //  ImportedDefaultBinding
-            //  NameSpaceImport
-            //  NamedImports
-            //  ImportedDefaultBinding, NameSpaceImport
-            //  ImportedDefaultBinding, NamedImports
-            var importClause = createNode(231 /* ImportClause */, fullStart);
-            if (identifier) {
-                // ImportedDefaultBinding:
-                //  ImportedBinding
-                importClause.name = identifier;
-            }
-            // If there was no default import or if there is comma token after default import
-            // parse namespace or named imports
-            if (!importClause.name ||
-                parseOptional(24 /* CommaToken */)) {
-                importClause.namedBindings = token === 37 /* AsteriskToken */ ? parseNamespaceImport() : parseNamedImportsOrExports(233 /* NamedImports */);
-            }
-            return finishNode(importClause);
-        }
-        function parseModuleReference() {
-            return isExternalModuleReference()
-                ? parseExternalModuleReference()
-                : parseEntityName(/*allowReservedWords*/ false);
-        }
-        function parseExternalModuleReference() {
-            var node = createNode(240 /* ExternalModuleReference */);
-            parseExpected(129 /* RequireKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = parseModuleSpecifier();
-            parseExpected(18 /* CloseParenToken */);
-            return finishNode(node);
-        }
-        function parseModuleSpecifier() {
-            if (token === 9 /* StringLiteral */) {
-                var result = parseLiteralNode();
-                internIdentifier(result.text);
-                return result;
-            }
-            else {
-                // We allow arbitrary expressions here, even though the grammar only allows string
-                // literals.  We check to ensure that it is only a string literal later in the grammar
-                // check pass.
-                return parseExpression();
-            }
-        }
-        function parseNamespaceImport() {
-            // NameSpaceImport:
-            //  * as ImportedBinding
-            var namespaceImport = createNode(232 /* NamespaceImport */);
-            parseExpected(37 /* AsteriskToken */);
-            parseExpected(116 /* AsKeyword */);
-            namespaceImport.name = parseIdentifier();
-            return finishNode(namespaceImport);
-        }
-        function parseNamedImportsOrExports(kind) {
-            var node = createNode(kind);
-            // NamedImports:
-            //  { }
-            //  { ImportsList }
-            //  { ImportsList, }
-            // ImportsList:
-            //  ImportSpecifier
-            //  ImportsList, ImportSpecifier
-            node.elements = parseBracketedList(21 /* ImportOrExportSpecifiers */, kind === 233 /* NamedImports */ ? parseImportSpecifier : parseExportSpecifier, 15 /* OpenBraceToken */, 16 /* CloseBraceToken */);
-            return finishNode(node);
-        }
-        function parseExportSpecifier() {
-            return parseImportOrExportSpecifier(238 /* ExportSpecifier */);
-        }
-        function parseImportSpecifier() {
-            return parseImportOrExportSpecifier(234 /* ImportSpecifier */);
-        }
-        function parseImportOrExportSpecifier(kind) {
-            var node = createNode(kind);
-            // ImportSpecifier:
-            //   BindingIdentifier
-            //   IdentifierName as BindingIdentifier
-            // ExportSpecifier:
-            //   IdentifierName
-            //   IdentifierName as IdentifierName
-            var checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
-            var checkIdentifierStart = scanner.getTokenPos();
-            var checkIdentifierEnd = scanner.getTextPos();
-            var identifierName = parseIdentifierName();
-            if (token === 116 /* AsKeyword */) {
-                node.propertyName = identifierName;
-                parseExpected(116 /* AsKeyword */);
-                checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
-                checkIdentifierStart = scanner.getTokenPos();
-                checkIdentifierEnd = scanner.getTextPos();
-                node.name = parseIdentifierName();
-            }
-            else {
-                node.name = identifierName;
-            }
-            if (kind === 234 /* ImportSpecifier */ && checkIdentifierIsKeyword) {
-                // Report error identifier expected
-                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
-            }
-            return finishNode(node);
-        }
-        function parseExportDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(236 /* ExportDeclaration */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (parseOptional(37 /* AsteriskToken */)) {
-                parseExpected(136 /* FromKeyword */);
-                node.moduleSpecifier = parseModuleSpecifier();
-            }
-            else {
-                node.exportClause = parseNamedImportsOrExports(237 /* NamedExports */);
-                // It is not uncommon to accidentally omit the 'from' keyword. Additionally, in editing scenarios,
-                // the 'from' keyword can be parsed as a named export when the export clause is unterminated (i.e. `export { from "moduleName";`)
-                // If we don't have a 'from' keyword, see if we have a string literal such that ASI won't take effect.
-                if (token === 136 /* FromKeyword */ || (token === 9 /* StringLiteral */ && !scanner.hasPrecedingLineBreak())) {
-                    parseExpected(136 /* FromKeyword */);
-                    node.moduleSpecifier = parseModuleSpecifier();
-                }
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseExportAssignment(fullStart, decorators, modifiers) {
-            var node = createNode(235 /* ExportAssignment */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (parseOptional(56 /* EqualsToken */)) {
-                node.isExportEquals = true;
-            }
-            else {
-                parseExpected(77 /* DefaultKeyword */);
-            }
-            node.expression = parseAssignmentExpressionOrHigher();
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function processReferenceComments(sourceFile) {
-            var triviaScanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ false, 0 /* Standard */, sourceText);
-            var referencedFiles = [];
-            var typeReferenceDirectives = [];
-            var amdDependencies = [];
-            var amdModuleName;
-            // Keep scanning all the leading trivia in the file until we get to something that
-            // isn't trivia.  Any single line comment will be analyzed to see if it is a
-            // reference comment.
-            while (true) {
-                var kind = triviaScanner.scan();
-                if (kind !== 2 /* SingleLineCommentTrivia */) {
-                    if (ts.isTrivia(kind)) {
-                        continue;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                var range = { pos: triviaScanner.getTokenPos(), end: triviaScanner.getTextPos(), kind: triviaScanner.getToken() };
-                var comment = sourceText.substring(range.pos, range.end);
-                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
-                if (referencePathMatchResult) {
-                    var fileReference = referencePathMatchResult.fileReference;
-                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
-                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
-                    if (fileReference) {
-                        if (referencePathMatchResult.isTypeReferenceDirective) {
-                            typeReferenceDirectives.push(fileReference);
-                        }
-                        else {
-                            referencedFiles.push(fileReference);
-                        }
-                    }
-                    if (diagnosticMessage) {
-                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
-                    }
-                }
-                else {
-                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
-                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
-                    if (amdModuleNameMatchResult) {
-                        if (amdModuleName) {
-                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
-                        }
-                        amdModuleName = amdModuleNameMatchResult[2];
-                    }
-                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
-                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
-                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
-                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
-                    if (amdDependencyMatchResult) {
-                        var pathMatchResult = pathRegex.exec(comment);
-                        var nameMatchResult = nameRegex.exec(comment);
-                        if (pathMatchResult) {
-                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
-                            amdDependencies.push(amdDependency);
-                        }
-                    }
-                }
-            }
-            sourceFile.referencedFiles = referencedFiles;
-            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
-            sourceFile.amdDependencies = amdDependencies;
-            sourceFile.moduleName = amdModuleName;
-        }
-        function setExternalModuleIndicator(sourceFile) {
-            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
-                return node.flags & 1 /* Export */
-                    || node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 240 /* ExternalModuleReference */
-                    || node.kind === 230 /* ImportDeclaration */
-                    || node.kind === 235 /* ExportAssignment */
-                    || node.kind === 236 /* ExportDeclaration */
-                    ? node
-                    : undefined;
-            });
-        }
-        var ParsingContext;
-        (function (ParsingContext) {
-            ParsingContext[ParsingContext["SourceElements"] = 0] = "SourceElements";
-            ParsingContext[ParsingContext["BlockStatements"] = 1] = "BlockStatements";
-            ParsingContext[ParsingContext["SwitchClauses"] = 2] = "SwitchClauses";
-            ParsingContext[ParsingContext["SwitchClauseStatements"] = 3] = "SwitchClauseStatements";
-            ParsingContext[ParsingContext["TypeMembers"] = 4] = "TypeMembers";
-            ParsingContext[ParsingContext["ClassMembers"] = 5] = "ClassMembers";
-            ParsingContext[ParsingContext["EnumMembers"] = 6] = "EnumMembers";
-            ParsingContext[ParsingContext["HeritageClauseElement"] = 7] = "HeritageClauseElement";
-            ParsingContext[ParsingContext["VariableDeclarations"] = 8] = "VariableDeclarations";
-            ParsingContext[ParsingContext["ObjectBindingElements"] = 9] = "ObjectBindingElements";
-            ParsingContext[ParsingContext["ArrayBindingElements"] = 10] = "ArrayBindingElements";
-            ParsingContext[ParsingContext["ArgumentExpressions"] = 11] = "ArgumentExpressions";
-            ParsingContext[ParsingContext["ObjectLiteralMembers"] = 12] = "ObjectLiteralMembers";
-            ParsingContext[ParsingContext["JsxAttributes"] = 13] = "JsxAttributes";
-            ParsingContext[ParsingContext["JsxChildren"] = 14] = "JsxChildren";
-            ParsingContext[ParsingContext["ArrayLiteralMembers"] = 15] = "ArrayLiteralMembers";
-            ParsingContext[ParsingContext["Parameters"] = 16] = "Parameters";
-            ParsingContext[ParsingContext["TypeParameters"] = 17] = "TypeParameters";
-            ParsingContext[ParsingContext["TypeArguments"] = 18] = "TypeArguments";
-            ParsingContext[ParsingContext["TupleElementTypes"] = 19] = "TupleElementTypes";
-            ParsingContext[ParsingContext["HeritageClauses"] = 20] = "HeritageClauses";
-            ParsingContext[ParsingContext["ImportOrExportSpecifiers"] = 21] = "ImportOrExportSpecifiers";
-            ParsingContext[ParsingContext["JSDocFunctionParameters"] = 22] = "JSDocFunctionParameters";
-            ParsingContext[ParsingContext["JSDocTypeArguments"] = 23] = "JSDocTypeArguments";
-            ParsingContext[ParsingContext["JSDocRecordMembers"] = 24] = "JSDocRecordMembers";
-            ParsingContext[ParsingContext["JSDocTupleTypes"] = 25] = "JSDocTupleTypes";
-            ParsingContext[ParsingContext["Count"] = 26] = "Count"; // Number of parsing contexts
-        })(ParsingContext || (ParsingContext = {}));
-        var Tristate;
-        (function (Tristate) {
-            Tristate[Tristate["False"] = 0] = "False";
-            Tristate[Tristate["True"] = 1] = "True";
-            Tristate[Tristate["Unknown"] = 2] = "Unknown";
-        })(Tristate || (Tristate = {}));
-        var JSDocParser;
-        (function (JSDocParser) {
-            function isJSDocType() {
-                switch (token) {
-                    case 37 /* AsteriskToken */:
-                    case 53 /* QuestionToken */:
-                    case 17 /* OpenParenToken */:
-                    case 19 /* OpenBracketToken */:
-                    case 49 /* ExclamationToken */:
-                    case 15 /* OpenBraceToken */:
-                    case 87 /* FunctionKeyword */:
-                    case 22 /* DotDotDotToken */:
-                    case 92 /* NewKeyword */:
-                    case 97 /* ThisKeyword */:
-                        return true;
-                }
-                return ts.tokenIsIdentifierOrKeyword(token);
-            }
-            JSDocParser.isJSDocType = isJSDocType;
-            function parseJSDocTypeExpressionForTests(content, start, length) {
-                initializeState("file.js", content, 2 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
-                scanner.setText(content, start, length);
-                token = scanner.scan();
-                var jsDocTypeExpression = parseJSDocTypeExpression();
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
-            }
-            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-            // Parses out a JSDoc type expression.
-            /* @internal */
-            function parseJSDocTypeExpression() {
-                var result = createNode(257 /* JSDocTypeExpression */, scanner.getTokenPos());
-                parseExpected(15 /* OpenBraceToken */);
-                result.type = parseJSDocTopLevelType();
-                parseExpected(16 /* CloseBraceToken */);
-                fixupParentReferences(result);
-                return finishNode(result);
-            }
-            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
-            function parseJSDocTopLevelType() {
-                var type = parseJSDocType();
-                if (token === 47 /* BarToken */) {
-                    var unionType = createNode(261 /* JSDocUnionType */, type.pos);
-                    unionType.types = parseJSDocTypeList(type);
-                    type = finishNode(unionType);
-                }
-                if (token === 56 /* EqualsToken */) {
-                    var optionalType = createNode(268 /* JSDocOptionalType */, type.pos);
-                    nextToken();
-                    optionalType.type = type;
-                    type = finishNode(optionalType);
-                }
-                return type;
-            }
-            function parseJSDocType() {
-                var type = parseBasicTypeExpression();
-                while (true) {
-                    if (token === 19 /* OpenBracketToken */) {
-                        var arrayType = createNode(260 /* JSDocArrayType */, type.pos);
-                        arrayType.elementType = type;
-                        nextToken();
-                        parseExpected(20 /* CloseBracketToken */);
-                        type = finishNode(arrayType);
-                    }
-                    else if (token === 53 /* QuestionToken */) {
-                        var nullableType = createNode(263 /* JSDocNullableType */, type.pos);
-                        nullableType.type = type;
-                        nextToken();
-                        type = finishNode(nullableType);
-                    }
-                    else if (token === 49 /* ExclamationToken */) {
-                        var nonNullableType = createNode(264 /* JSDocNonNullableType */, type.pos);
-                        nonNullableType.type = type;
-                        nextToken();
-                        type = finishNode(nonNullableType);
-                    }
-                    else {
-                        break;
-                    }
-                }
-                return type;
-            }
-            function parseBasicTypeExpression() {
-                switch (token) {
-                    case 37 /* AsteriskToken */:
-                        return parseJSDocAllType();
-                    case 53 /* QuestionToken */:
-                        return parseJSDocUnknownOrNullableType();
-                    case 17 /* OpenParenToken */:
-                        return parseJSDocUnionType();
-                    case 19 /* OpenBracketToken */:
-                        return parseJSDocTupleType();
-                    case 49 /* ExclamationToken */:
-                        return parseJSDocNonNullableType();
-                    case 15 /* OpenBraceToken */:
-                        return parseJSDocRecordType();
-                    case 87 /* FunctionKeyword */:
-                        return parseJSDocFunctionType();
-                    case 22 /* DotDotDotToken */:
-                        return parseJSDocVariadicType();
-                    case 92 /* NewKeyword */:
-                        return parseJSDocConstructorType();
-                    case 97 /* ThisKeyword */:
-                        return parseJSDocThisType();
-                    case 117 /* AnyKeyword */:
-                    case 132 /* StringKeyword */:
-                    case 130 /* NumberKeyword */:
-                    case 120 /* BooleanKeyword */:
-                    case 133 /* SymbolKeyword */:
-                    case 103 /* VoidKeyword */:
-                        return parseTokenNode();
-                }
-                // TODO (drosen): Parse string literal types in JSDoc as well.
-                return parseJSDocTypeReference();
-            }
-            function parseJSDocThisType() {
-                var result = createNode(272 /* JSDocThisType */);
-                nextToken();
-                parseExpected(54 /* ColonToken */);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocConstructorType() {
-                var result = createNode(271 /* JSDocConstructorType */);
-                nextToken();
-                parseExpected(54 /* ColonToken */);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocVariadicType() {
-                var result = createNode(270 /* JSDocVariadicType */);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocFunctionType() {
-                var result = createNode(269 /* JSDocFunctionType */);
-                nextToken();
-                parseExpected(17 /* OpenParenToken */);
-                result.parameters = parseDelimitedList(22 /* JSDocFunctionParameters */, parseJSDocParameter);
-                checkForTrailingComma(result.parameters);
-                parseExpected(18 /* CloseParenToken */);
-                if (token === 54 /* ColonToken */) {
-                    nextToken();
-                    result.type = parseJSDocType();
-                }
-                return finishNode(result);
-            }
-            function parseJSDocParameter() {
-                var parameter = createNode(142 /* Parameter */);
-                parameter.type = parseJSDocType();
-                if (parseOptional(56 /* EqualsToken */)) {
-                    parameter.questionToken = createNode(56 /* EqualsToken */);
-                }
-                return finishNode(parameter);
-            }
-            function parseJSDocTypeReference() {
-                var result = createNode(267 /* JSDocTypeReference */);
-                result.name = parseSimplePropertyName();
-                if (token === 25 /* LessThanToken */) {
-                    result.typeArguments = parseTypeArguments();
-                }
-                else {
-                    while (parseOptional(21 /* DotToken */)) {
-                        if (token === 25 /* LessThanToken */) {
-                            result.typeArguments = parseTypeArguments();
-                            break;
-                        }
-                        else {
-                            result.name = parseQualifiedName(result.name);
-                        }
-                    }
-                }
-                return finishNode(result);
-            }
-            function parseTypeArguments() {
-                // Move past the <
-                nextToken();
-                var typeArguments = parseDelimitedList(23 /* JSDocTypeArguments */, parseJSDocType);
-                checkForTrailingComma(typeArguments);
-                checkForEmptyTypeArgumentList(typeArguments);
-                parseExpected(27 /* GreaterThanToken */);
-                return typeArguments;
-            }
-            function checkForEmptyTypeArgumentList(typeArguments) {
-                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
-                    var start = typeArguments.pos - "<".length;
-                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
-                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
-                }
-            }
-            function parseQualifiedName(left) {
-                var result = createNode(139 /* QualifiedName */, left.pos);
-                result.left = left;
-                result.right = parseIdentifierName();
-                return finishNode(result);
-            }
-            function parseJSDocRecordType() {
-                var result = createNode(265 /* JSDocRecordType */);
-                nextToken();
-                result.members = parseDelimitedList(24 /* JSDocRecordMembers */, parseJSDocRecordMember);
-                checkForTrailingComma(result.members);
-                parseExpected(16 /* CloseBraceToken */);
-                return finishNode(result);
-            }
-            function parseJSDocRecordMember() {
-                var result = createNode(266 /* JSDocRecordMember */);
-                result.name = parseSimplePropertyName();
-                if (token === 54 /* ColonToken */) {
-                    nextToken();
-                    result.type = parseJSDocType();
-                }
-                return finishNode(result);
-            }
-            function parseJSDocNonNullableType() {
-                var result = createNode(264 /* JSDocNonNullableType */);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocTupleType() {
-                var result = createNode(262 /* JSDocTupleType */);
-                nextToken();
-                result.types = parseDelimitedList(25 /* JSDocTupleTypes */, parseJSDocType);
-                checkForTrailingComma(result.types);
-                parseExpected(20 /* CloseBracketToken */);
-                return finishNode(result);
-            }
-            function checkForTrailingComma(list) {
-                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
-                    var start = list.end - ",".length;
-                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
-                }
-            }
-            function parseJSDocUnionType() {
-                var result = createNode(261 /* JSDocUnionType */);
-                nextToken();
-                result.types = parseJSDocTypeList(parseJSDocType());
-                parseExpected(18 /* CloseParenToken */);
-                return finishNode(result);
-            }
-            function parseJSDocTypeList(firstType) {
-                ts.Debug.assert(!!firstType);
-                var types = [];
-                types.pos = firstType.pos;
-                types.push(firstType);
-                while (parseOptional(47 /* BarToken */)) {
-                    types.push(parseJSDocType());
-                }
-                types.end = scanner.getStartPos();
-                return types;
-            }
-            function parseJSDocAllType() {
-                var result = createNode(258 /* JSDocAllType */);
-                nextToken();
-                return finishNode(result);
-            }
-            function parseJSDocUnknownOrNullableType() {
-                var pos = scanner.getStartPos();
-                // skip the ?
-                nextToken();
-                // Need to lookahead to decide if this is a nullable or unknown type.
-                // Here are cases where we'll pick the unknown type:
-                //
-                //      Foo(?,
-                //      { a: ? }
-                //      Foo(?)
-                //      Foo<?>
-                //      Foo(?=
-                //      (?|
-                if (token === 24 /* CommaToken */ ||
-                    token === 16 /* CloseBraceToken */ ||
-                    token === 18 /* CloseParenToken */ ||
-                    token === 27 /* GreaterThanToken */ ||
-                    token === 56 /* EqualsToken */ ||
-                    token === 47 /* BarToken */) {
-                    var result = createNode(259 /* JSDocUnknownType */, pos);
-                    return finishNode(result);
-                }
-                else {
-                    var result = createNode(263 /* JSDocNullableType */, pos);
-                    result.type = parseJSDocType();
-                    return finishNode(result);
-                }
-            }
-            function parseIsolatedJSDocComment(content, start, length) {
-                initializeState("file.js", content, 2 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
-                sourceFile = { languageVariant: 0 /* Standard */, text: content };
-                var jsDocComment = parseJSDocCommentWorker(start, length);
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDocComment ? { jsDocComment: jsDocComment, diagnostics: diagnostics } : undefined;
-            }
-            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-            function parseJSDocComment(parent, start, length) {
-                var saveToken = token;
-                var saveParseDiagnosticsLength = parseDiagnostics.length;
-                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-                var comment = parseJSDocCommentWorker(start, length);
-                if (comment) {
-                    comment.parent = parent;
-                }
-                token = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-                return comment;
-            }
-            JSDocParser.parseJSDocComment = parseJSDocComment;
-            function parseJSDocCommentWorker(start, length) {
-                var content = sourceText;
-                start = start || 0;
-                var end = length === undefined ? content.length : start + length;
-                length = end - start;
-                ts.Debug.assert(start >= 0);
-                ts.Debug.assert(start <= end);
-                ts.Debug.assert(end <= content.length);
-                var tags;
-                var result;
-                // Check for /** (JSDoc opening part)
-                if (content.charCodeAt(start) === 47 /* slash */ &&
-                    content.charCodeAt(start + 1) === 42 /* asterisk */ &&
-                    content.charCodeAt(start + 2) === 42 /* asterisk */ &&
-                    content.charCodeAt(start + 3) !== 42 /* asterisk */) {
-                    // + 3 for leading /**, - 5 in total for /** */
-                    scanner.scanRange(start + 3, length - 5, function () {
-                        // Initially we can parse out a tag.  We also have seen a starting asterisk.
-                        // This is so that /** * @type */ doesn't parse.
-                        var canParseTag = true;
-                        var seenAsterisk = true;
-                        nextJSDocToken();
-                        while (token !== 1 /* EndOfFileToken */) {
-                            switch (token) {
-                                case 55 /* AtToken */:
-                                    if (canParseTag) {
-                                        parseTag();
-                                    }
-                                    // This will take us to the end of the line, so it's OK to parse a tag on the next pass through the loop
-                                    seenAsterisk = false;
-                                    break;
-                                case 4 /* NewLineTrivia */:
-                                    // After a line break, we can parse a tag, and we haven't seen an asterisk on the next line yet
-                                    canParseTag = true;
-                                    seenAsterisk = false;
-                                    break;
-                                case 37 /* AsteriskToken */:
-                                    if (seenAsterisk) {
-                                        // If we've already seen an asterisk, then we can no longer parse a tag on this line
-                                        canParseTag = false;
-                                    }
-                                    // Ignore the first asterisk on a line
-                                    seenAsterisk = true;
-                                    break;
-                                case 69 /* Identifier */:
-                                    // Anything else is doc comment text.  We can't do anything with it.  Because it
-                                    // wasn't a tag, we can no longer parse a tag on this line until we hit the next
-                                    // line break.
-                                    canParseTag = false;
-                                    break;
-                                case 1 /* EndOfFileToken */:
-                                    break;
-                            }
-                            nextJSDocToken();
-                        }
-                        result = createJSDocComment();
-                    });
-                }
-                return result;
-                function createJSDocComment() {
-                    if (!tags) {
-                        return undefined;
-                    }
-                    var result = createNode(273 /* JSDocComment */, start);
-                    result.tags = tags;
-                    return finishNode(result, end);
-                }
-                function skipWhitespace() {
-                    while (token === 5 /* WhitespaceTrivia */ || token === 4 /* NewLineTrivia */) {
-                        nextJSDocToken();
-                    }
-                }
-                function parseTag() {
-                    ts.Debug.assert(token === 55 /* AtToken */);
-                    var atToken = createNode(55 /* AtToken */, scanner.getTokenPos());
-                    atToken.end = scanner.getTextPos();
-                    nextJSDocToken();
-                    var tagName = parseJSDocIdentifierName();
-                    if (!tagName) {
-                        return;
-                    }
-                    var tag = handleTag(atToken, tagName) || handleUnknownTag(atToken, tagName);
-                    addTag(tag);
-                }
-                function handleTag(atToken, tagName) {
-                    if (tagName) {
-                        switch (tagName.text) {
-                            case "param":
-                                return handleParamTag(atToken, tagName);
-                            case "return":
-                            case "returns":
-                                return handleReturnTag(atToken, tagName);
-                            case "template":
-                                return handleTemplateTag(atToken, tagName);
-                            case "type":
-                                return handleTypeTag(atToken, tagName);
-                        }
-                    }
-                    return undefined;
-                }
-                function handleUnknownTag(atToken, tagName) {
-                    var result = createNode(274 /* JSDocTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    return finishNode(result);
-                }
-                function addTag(tag) {
-                    if (tag) {
-                        if (!tags) {
-                            tags = [];
-                            tags.pos = tag.pos;
-                        }
-                        tags.push(tag);
-                        tags.end = tag.end;
-                    }
-                }
-                function tryParseTypeExpression() {
-                    if (token !== 15 /* OpenBraceToken */) {
-                        return undefined;
-                    }
-                    var typeExpression = parseJSDocTypeExpression();
-                    return typeExpression;
-                }
-                function handleParamTag(atToken, tagName) {
-                    var typeExpression = tryParseTypeExpression();
-                    skipWhitespace();
-                    var name;
-                    var isBracketed;
-                    // Looking for something like '[foo]' or 'foo'
-                    if (parseOptionalToken(19 /* OpenBracketToken */)) {
-                        name = parseJSDocIdentifierName();
-                        isBracketed = true;
-                        // May have an optional default, e.g. '[foo = 42]'
-                        if (parseOptionalToken(56 /* EqualsToken */)) {
-                            parseExpression();
-                        }
-                        parseExpected(20 /* CloseBracketToken */);
-                    }
-                    else if (ts.tokenIsIdentifierOrKeyword(token)) {
-                        name = parseJSDocIdentifierName();
-                    }
-                    if (!name) {
-                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var preName, postName;
-                    if (typeExpression) {
-                        postName = name;
-                    }
-                    else {
-                        preName = name;
-                    }
-                    if (!typeExpression) {
-                        typeExpression = tryParseTypeExpression();
-                    }
-                    var result = createNode(275 /* JSDocParameterTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.preParameterName = preName;
-                    result.typeExpression = typeExpression;
-                    result.postParameterName = postName;
-                    result.isBracketed = isBracketed;
-                    return finishNode(result);
-                }
-                function handleReturnTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 276 /* JSDocReturnTag */; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(276 /* JSDocReturnTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
-                }
-                function handleTypeTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 277 /* JSDocTypeTag */; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(277 /* JSDocTypeTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
-                }
-                function handleTemplateTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 278 /* JSDocTemplateTag */; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    // Type parameter list looks like '@template T,U,V'
-                    var typeParameters = [];
-                    typeParameters.pos = scanner.getStartPos();
-                    while (true) {
-                        var name_8 = parseJSDocIdentifierName();
-                        if (!name_8) {
-                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                            return undefined;
-                        }
-                        var typeParameter = createNode(141 /* TypeParameter */, name_8.pos);
-                        typeParameter.name = name_8;
-                        finishNode(typeParameter);
-                        typeParameters.push(typeParameter);
-                        if (token === 24 /* CommaToken */) {
-                            nextJSDocToken();
-                        }
-                        else {
-                            break;
-                        }
-                    }
-                    var result = createNode(278 /* JSDocTemplateTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeParameters = typeParameters;
-                    finishNode(result);
-                    typeParameters.end = result.end;
-                    return result;
-                }
-                function nextJSDocToken() {
-                    return token = scanner.scanJSDocToken();
-                }
-                function parseJSDocIdentifierName() {
-                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token));
-                }
-                function createJSDocIdentifier(isIdentifier) {
-                    if (!isIdentifier) {
-                        parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var pos = scanner.getTokenPos();
-                    var end = scanner.getTextPos();
-                    var result = createNode(69 /* Identifier */, pos);
-                    result.text = content.substring(pos, end);
-                    finishNode(result, end);
-                    nextJSDocToken();
-                    return result;
-                }
-            }
-            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
-        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
-    })(Parser || (Parser = {}));
-    var IncrementalParser;
-    (function (IncrementalParser) {
-        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2 /* Aggressive */);
-            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
-            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
-                // if the text didn't change, then we can just return our current source file as-is.
-                return sourceFile;
-            }
-            if (sourceFile.statements.length === 0) {
-                // If we don't have any statements in the current source file, then there's no real
-                // way to incrementally parse.  So just do a full parse instead.
-                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, /*syntaxCursor*/ undefined, /*setParentNodes*/ true, sourceFile.scriptKind);
-            }
-            // Make sure we're not trying to incrementally update a source file more than once.  Once
-            // we do an update the original source file is considered unusable from that point onwards.
-            //
-            // This is because we do incremental parsing in-place.  i.e. we take nodes from the old
-            // tree and give them new positions and parents.  From that point on, trusting the old
-            // tree at all is not possible as far too much of it may violate invariants.
-            var incrementalSourceFile = sourceFile;
-            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
-            incrementalSourceFile.hasBeenIncrementallyParsed = true;
-            var oldText = sourceFile.text;
-            var syntaxCursor = createSyntaxCursor(sourceFile);
-            // Make the actual change larger so that we know to reparse anything whose lookahead
-            // might have intersected the change.
-            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
-            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
-            // Ensure that extending the affected range only moved the start of the change range
-            // earlier in the file.
-            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
-            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
-            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
-            // The is the amount the nodes after the edit range need to be adjusted.  It can be
-            // positive (if the edit added characters), negative (if the edit deleted characters)
-            // or zero (if this was a pure overwrite with nothing added/removed).
-            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
-            // If we added or removed characters during the edit, then we need to go and adjust all
-            // the nodes after the edit.  Those nodes may move forward (if we inserted chars) or they
-            // may move backward (if we deleted chars).
-            //
-            // Doing this helps us out in two ways.  First, it means that any nodes/tokens we want
-            // to reuse are already at the appropriate position in the new text.  That way when we
-            // reuse them, we don't have to figure out if they need to be adjusted.  Second, it makes
-            // it very easy to determine if we can reuse a node.  If the node's position is at where
-            // we are in the text, then we can reuse it.  Otherwise we can't.  If the node's position
-            // is ahead of us, then we'll need to rescan tokens.  If the node's position is behind
-            // us, then we'll need to skip it or crumble it as appropriate
-            //
-            // We will also adjust the positions of nodes that intersect the change range as well.
-            // By doing this, we ensure that all the positions in the old tree are consistent, not
-            // just the positions of nodes entirely before/after the change range.  By being
-            // consistent, we can then easily map from positions to nodes in the old tree easily.
-            //
-            // Also, mark any syntax elements that intersect the changed span.  We know, up front,
-            // that we cannot reuse these elements.
-            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
-            // Now that we've set up our internal incremental state just proceed and parse the
-            // source file in the normal fashion.  When possible the parser will retrieve and
-            // reuse nodes from the old tree.
-            //
-            // Note: passing in 'true' for setNodeParents is very important.  When incrementally
-            // parsing, we will be reusing nodes from the old tree, and placing it into new
-            // parents.  If we don't set the parents now, we'll end up with an observably
-            // inconsistent tree.  Setting the parents on the new tree should be very fast.  We
-            // will immediately bail out of walking any subtrees when we can see that their parents
-            // are already correct.
-            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, /*setParentNodes*/ true, sourceFile.scriptKind);
-            return result;
-        }
-        IncrementalParser.updateSourceFile = updateSourceFile;
-        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
-            if (isArray) {
-                visitArray(element);
-            }
-            else {
-                visitNode(element);
-            }
-            return;
-            function visitNode(node) {
-                var text = "";
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    text = oldText.substring(node.pos, node.end);
-                }
-                // Ditch any existing LS children we may have created.  This way we can avoid
-                // moving them forward.
-                if (node._children) {
-                    node._children = undefined;
-                }
-                if (node.jsDocComment) {
-                    node.jsDocComment = undefined;
-                }
-                node.pos += delta;
-                node.end += delta;
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
-                }
-                forEachChild(node, visitNode, visitArray);
-                checkNodePositions(node, aggressiveChecks);
-            }
-            function visitArray(array) {
-                array._children = undefined;
-                array.pos += delta;
-                array.end += delta;
-                for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
-                    var node = array_7[_i];
-                    visitNode(node);
-                }
-            }
-        }
-        function shouldCheckNode(node) {
-            switch (node.kind) {
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 69 /* Identifier */:
-                    return true;
-            }
-            return false;
-        }
-        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
-            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
-            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
-            ts.Debug.assert(element.pos <= element.end);
-            // We have an element that intersects the change range in some way.  It may have its
-            // start, or its end (or both) in the changed range.  We want to adjust any part
-            // that intersects such that the final tree is in a consistent state.  i.e. all
-            // children have spans within the span of their parent, and all siblings are ordered
-            // properly.
-            // We may need to update both the 'pos' and the 'end' of the element.
-            // If the 'pos' is before the start of the change, then we don't need to touch it.
-            // If it isn't, then the 'pos' must be inside the change.  How we update it will
-            // depend if delta is  positive or negative.  If delta is positive then we have
-            // something like:
-            //
-            //  -------------------AAA-----------------
-            //  -------------------BBBCCCCCCC-----------------
-            //
-            // In this case, we consider any node that started in the change range to still be
-            // starting at the same position.
-            //
-            // however, if the delta is negative, then we instead have something like this:
-            //
-            //  -------------------XXXYYYYYYY-----------------
-            //  -------------------ZZZ-----------------
-            //
-            // In this case, any element that started in the 'X' range will keep its position.
-            // However any element that started after that will have their pos adjusted to be
-            // at the end of the new range.  i.e. any node that started in the 'Y' range will
-            // be adjusted to have their start at the end of the 'Z' range.
-            //
-            // The element will keep its position if possible.  Or Move backward to the new-end
-            // if it's in the 'Y' range.
-            element.pos = Math.min(element.pos, changeRangeNewEnd);
-            // If the 'end' is after the change range, then we always adjust it by the delta
-            // amount.  However, if the end is in the change range, then how we adjust it
-            // will depend on if delta is  positive or negative.  If delta is positive then we
-            // have something like:
-            //
-            //  -------------------AAA-----------------
-            //  -------------------BBBCCCCCCC-----------------
-            //
-            // In this case, we consider any node that ended inside the change range to keep its
-            // end position.
-            //
-            // however, if the delta is negative, then we instead have something like this:
-            //
-            //  -------------------XXXYYYYYYY-----------------
-            //  -------------------ZZZ-----------------
-            //
-            // In this case, any element that ended in the 'X' range will keep its position.
-            // However any element that ended after that will have their pos adjusted to be
-            // at the end of the new range.  i.e. any node that ended in the 'Y' range will
-            // be adjusted to have their end at the end of the 'Z' range.
-            if (element.end >= changeRangeOldEnd) {
-                // Element ends after the change range.  Always adjust the end pos.
-                element.end += delta;
-            }
-            else {
-                // Element ends in the change range.  The element will keep its position if
-                // possible. Or Move backward to the new-end if it's in the 'Y' range.
-                element.end = Math.min(element.end, changeRangeNewEnd);
-            }
-            ts.Debug.assert(element.pos <= element.end);
-            if (element.parent) {
-                ts.Debug.assert(element.pos >= element.parent.pos);
-                ts.Debug.assert(element.end <= element.parent.end);
-            }
-        }
-        function checkNodePositions(node, aggressiveChecks) {
-            if (aggressiveChecks) {
-                var pos_2 = node.pos;
-                forEachChild(node, function (child) {
-                    ts.Debug.assert(child.pos >= pos_2);
-                    pos_2 = child.end;
-                });
-                ts.Debug.assert(pos_2 <= node.end);
-            }
-        }
-        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
-            visitNode(sourceFile);
-            return;
-            function visitNode(child) {
-                ts.Debug.assert(child.pos <= child.end);
-                if (child.pos > changeRangeOldEnd) {
-                    // Node is entirely past the change range.  We need to move both its pos and
-                    // end, forward or backward appropriately.
-                    moveElementEntirelyPastChangeRange(child, /*isArray*/ false, delta, oldText, newText, aggressiveChecks);
-                    return;
-                }
-                // Check if the element intersects the change range.  If it does, then it is not
-                // reusable.  Also, we'll need to recurse to see what constituent portions we may
-                // be able to use.
-                var fullEnd = child.end;
-                if (fullEnd >= changeStart) {
-                    child.intersectsChange = true;
-                    child._children = undefined;
-                    // Adjust the pos or end (or both) of the intersecting element accordingly.
-                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    forEachChild(child, visitNode, visitArray);
-                    checkNodePositions(child, aggressiveChecks);
-                    return;
-                }
-                // Otherwise, the node is entirely before the change range.  No need to do anything with it.
-                ts.Debug.assert(fullEnd < changeStart);
-            }
-            function visitArray(array) {
-                ts.Debug.assert(array.pos <= array.end);
-                if (array.pos > changeRangeOldEnd) {
-                    // Array is entirely after the change range.  We need to move it, and move any of
-                    // its children.
-                    moveElementEntirelyPastChangeRange(array, /*isArray*/ true, delta, oldText, newText, aggressiveChecks);
-                    return;
-                }
-                // Check if the element intersects the change range.  If it does, then it is not
-                // reusable.  Also, we'll need to recurse to see what constituent portions we may
-                // be able to use.
-                var fullEnd = array.end;
-                if (fullEnd >= changeStart) {
-                    array.intersectsChange = true;
-                    array._children = undefined;
-                    // Adjust the pos or end (or both) of the intersecting array accordingly.
-                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
-                        var node = array_8[_i];
-                        visitNode(node);
-                    }
-                    return;
-                }
-                // Otherwise, the array is entirely before the change range.  No need to do anything with it.
-                ts.Debug.assert(fullEnd < changeStart);
-            }
-        }
-        function extendToAffectedRange(sourceFile, changeRange) {
-            // Consider the following code:
-            //      void foo() { /; }
-            //
-            // If the text changes with an insertion of / just before the semicolon then we end up with:
-            //      void foo() { //; }
-            //
-            // If we were to just use the changeRange a is, then we would not rescan the { token
-            // (as it does not intersect the actual original change range).  Because an edit may
-            // change the token touching it, we actually need to look back *at least* one token so
-            // that the prior token sees that change.
-            var maxLookahead = 1;
-            var start = changeRange.span.start;
-            // the first iteration aligns us with the change start. subsequent iteration move us to
-            // the left by maxLookahead tokens.  We only need to do this as long as we're not at the
-            // start of the tree.
-            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
-                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
-                ts.Debug.assert(nearestNode.pos <= start);
-                var position = nearestNode.pos;
-                start = Math.max(0, position - 1);
-            }
-            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
-            var finalLength = changeRange.newLength + (changeRange.span.start - start);
-            return ts.createTextChangeRange(finalSpan, finalLength);
-        }
-        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
-            var bestResult = sourceFile;
-            var lastNodeEntirelyBeforePosition;
-            forEachChild(sourceFile, visit);
-            if (lastNodeEntirelyBeforePosition) {
-                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
-                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
-                    bestResult = lastChildOfLastEntireNodeBeforePosition;
-                }
-            }
-            return bestResult;
-            function getLastChild(node) {
-                while (true) {
-                    var lastChild = getLastChildWorker(node);
-                    if (lastChild) {
-                        node = lastChild;
-                    }
-                    else {
-                        return node;
-                    }
-                }
-            }
-            function getLastChildWorker(node) {
-                var last = undefined;
-                forEachChild(node, function (child) {
-                    if (ts.nodeIsPresent(child)) {
-                        last = child;
-                    }
-                });
-                return last;
-            }
-            function visit(child) {
-                if (ts.nodeIsMissing(child)) {
-                    // Missing nodes are effectively invisible to us.  We never even consider them
-                    // When trying to find the nearest node before us.
-                    return;
-                }
-                // If the child intersects this position, then this node is currently the nearest
-                // node that starts before the position.
-                if (child.pos <= position) {
-                    if (child.pos >= bestResult.pos) {
-                        // This node starts before the position, and is closer to the position than
-                        // the previous best node we found.  It is now the new best node.
-                        bestResult = child;
-                    }
-                    // Now, the node may overlap the position, or it may end entirely before the
-                    // position.  If it overlaps with the position, then either it, or one of its
-                    // children must be the nearest node before the position.  So we can just
-                    // recurse into this child to see if we can find something better.
-                    if (position < child.end) {
-                        // The nearest node is either this child, or one of the children inside
-                        // of it.  We've already marked this child as the best so far.  Recurse
-                        // in case one of the children is better.
-                        forEachChild(child, visit);
-                        // Once we look at the children of this node, then there's no need to
-                        // continue any further.
-                        return true;
-                    }
-                    else {
-                        ts.Debug.assert(child.end <= position);
-                        // The child ends entirely before this position.  Say you have the following
-                        // (where $ is the position)
-                        //
-                        //      <complex expr 1> ? <complex expr 2> $ : <...> <...>
-                        //
-                        // We would want to find the nearest preceding node in "complex expr 2".
-                        // To support that, we keep track of this node, and once we're done searching
-                        // for a best node, we recurse down this node to see if we can find a good
-                        // result in it.
-                        //
-                        // This approach allows us to quickly skip over nodes that are entirely
-                        // before the position, while still allowing us to find any nodes in the
-                        // last one that might be what we want.
-                        lastNodeEntirelyBeforePosition = child;
-                    }
-                }
-                else {
-                    ts.Debug.assert(child.pos > position);
-                    // We're now at a node that is entirely past the position we're searching for.
-                    // This node (and all following nodes) could never contribute to the result,
-                    // so just skip them by returning 'true' here.
-                    return true;
-                }
-            }
-        }
-        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            var oldText = sourceFile.text;
-            if (textChangeRange) {
-                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
-                if (aggressiveChecks || ts.Debug.shouldAssert(3 /* VeryAggressive */)) {
-                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
-                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
-                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
-                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
-                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
-                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
-                }
-            }
-        }
-        function createSyntaxCursor(sourceFile) {
-            var currentArray = sourceFile.statements;
-            var currentArrayIndex = 0;
-            ts.Debug.assert(currentArrayIndex < currentArray.length);
-            var current = currentArray[currentArrayIndex];
-            var lastQueriedPosition = -1 /* Value */;
-            return {
-                currentNode: function (position) {
-                    // Only compute the current node if the position is different than the last time
-                    // we were asked.  The parser commonly asks for the node at the same position
-                    // twice.  Once to know if can read an appropriate list element at a certain point,
-                    // and then to actually read and consume the node.
-                    if (position !== lastQueriedPosition) {
-                        // Much of the time the parser will need the very next node in the array that
-                        // we just returned a node from.So just simply check for that case and move
-                        // forward in the array instead of searching for the node again.
-                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
-                            currentArrayIndex++;
-                            current = currentArray[currentArrayIndex];
-                        }
-                        // If we don't have a node, or the node we have isn't in the right position,
-                        // then try to find a viable node at the position requested.
-                        if (!current || current.pos !== position) {
-                            findHighestListElementThatStartsAtPosition(position);
-                        }
-                    }
-                    // Cache this query so that we don't do any extra work if the parser calls back
-                    // into us.  Note: this is very common as the parser will make pairs of calls like
-                    // 'isListElement -> parseListElement'.  If we were unable to find a node when
-                    // called with 'isListElement', we don't want to redo the work when parseListElement
-                    // is called immediately after.
-                    lastQueriedPosition = position;
-                    // Either we don'd have a node, or we have a node at the position being asked for.
-                    ts.Debug.assert(!current || current.pos === position);
-                    return current;
-                }
-            };
-            // Finds the highest element in the tree we can find that starts at the provided position.
-            // The element must be a direct child of some node list in the tree.  This way after we
-            // return it, we can easily return its next sibling in the list.
-            function findHighestListElementThatStartsAtPosition(position) {
-                // Clear out any cached state about the last node we found.
-                currentArray = undefined;
-                currentArrayIndex = -1 /* Value */;
-                current = undefined;
-                // Recurse into the source file to find the highest node at this position.
-                forEachChild(sourceFile, visitNode, visitArray);
-                return;
-                function visitNode(node) {
-                    if (position >= node.pos && position < node.end) {
-                        // Position was within this node.  Keep searching deeper to find the node.
-                        forEachChild(node, visitNode, visitArray);
-                        // don't proceed any further in the search.
-                        return true;
-                    }
-                    // position wasn't in this node, have to keep searching.
-                    return false;
-                }
-                function visitArray(array) {
-                    if (position >= array.pos && position < array.end) {
-                        // position was in this array.  Search through this array to see if we find a
-                        // viable element.
-                        for (var i = 0, n = array.length; i < n; i++) {
-                            var child = array[i];
-                            if (child) {
-                                if (child.pos === position) {
-                                    // Found the right node.  We're done.
-                                    currentArray = array;
-                                    currentArrayIndex = i;
-                                    current = child;
-                                    return true;
-                                }
-                                else {
-                                    if (child.pos < position && position < child.end) {
-                                        // Position in somewhere within this child.  Search in it and
-                                        // stop searching in this array.
-                                        forEachChild(child, visitNode, visitArray);
-                                        return true;
-                                    }
-                                }
-                            }
-                        }
-                    }
-                    // position wasn't in this array, have to keep searching.
-                    return false;
-                }
-            }
-        }
-        var InvalidPosition;
-        (function (InvalidPosition) {
-            InvalidPosition[InvalidPosition["Value"] = -1] = "Value";
-        })(InvalidPosition || (InvalidPosition = {}));
-    })(IncrementalParser || (IncrementalParser = {}));
-})(ts || (ts = {}));
-/// <reference path="utilities.ts"/>
-/// <reference path="parser.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    ts.bindTime = 0;
-    (function (ModuleInstanceState) {
-        ModuleInstanceState[ModuleInstanceState["NonInstantiated"] = 0] = "NonInstantiated";
-        ModuleInstanceState[ModuleInstanceState["Instantiated"] = 1] = "Instantiated";
-        ModuleInstanceState[ModuleInstanceState["ConstEnumOnly"] = 2] = "ConstEnumOnly";
-    })(ts.ModuleInstanceState || (ts.ModuleInstanceState = {}));
-    var ModuleInstanceState = ts.ModuleInstanceState;
-    function getModuleInstanceState(node) {
-        // A module is uninstantiated if it contains only
-        // 1. interface declarations, type alias declarations
-        if (node.kind === 222 /* InterfaceDeclaration */ || node.kind === 223 /* TypeAliasDeclaration */) {
-            return 0 /* NonInstantiated */;
-        }
-        else if (ts.isConstEnumDeclaration(node)) {
-            return 2 /* ConstEnumOnly */;
-        }
-        else if ((node.kind === 230 /* ImportDeclaration */ || node.kind === 229 /* ImportEqualsDeclaration */) && !(node.flags & 1 /* Export */)) {
-            return 0 /* NonInstantiated */;
-        }
-        else if (node.kind === 226 /* ModuleBlock */) {
-            var state_1 = 0 /* NonInstantiated */;
-            ts.forEachChild(node, function (n) {
-                switch (getModuleInstanceState(n)) {
-                    case 0 /* NonInstantiated */:
-                        // child is non-instantiated - continue searching
-                        return false;
-                    case 2 /* ConstEnumOnly */:
-                        // child is const enum only - record state and continue searching
-                        state_1 = 2 /* ConstEnumOnly */;
-                        return false;
-                    case 1 /* Instantiated */:
-                        // child is instantiated - record state and stop
-                        state_1 = 1 /* Instantiated */;
-                        return true;
-                }
-            });
-            return state_1;
-        }
-        else if (node.kind === 225 /* ModuleDeclaration */) {
-            return getModuleInstanceState(node.body);
-        }
-        else {
-            return 1 /* Instantiated */;
-        }
-    }
-    ts.getModuleInstanceState = getModuleInstanceState;
-    var ContainerFlags;
-    (function (ContainerFlags) {
-        // The current node is not a container, and no container manipulation should happen before
-        // recursing into it.
-        ContainerFlags[ContainerFlags["None"] = 0] = "None";
-        // The current node is a container.  It should be set as the current container (and block-
-        // container) before recursing into it.  The current node does not have locals.  Examples:
-        //
-        //      Classes, ObjectLiterals, TypeLiterals, Interfaces...
-        ContainerFlags[ContainerFlags["IsContainer"] = 1] = "IsContainer";
-        // The current node is a block-scoped-container.  It should be set as the current block-
-        // container before recursing into it.  Examples:
-        //
-        //      Blocks (when not parented by functions), Catch clauses, For/For-in/For-of statements...
-        ContainerFlags[ContainerFlags["IsBlockScopedContainer"] = 2] = "IsBlockScopedContainer";
-        ContainerFlags[ContainerFlags["HasLocals"] = 4] = "HasLocals";
-        // If the current node is a container that also container that also contains locals.  Examples:
-        //
-        //      Functions, Methods, Modules, Source-files.
-        ContainerFlags[ContainerFlags["IsContainerWithLocals"] = 5] = "IsContainerWithLocals";
-    })(ContainerFlags || (ContainerFlags = {}));
-    var binder = createBinder();
-    function bindSourceFile(file, options) {
-        var start = new Date().getTime();
-        binder(file, options);
-        ts.bindTime += new Date().getTime() - start;
-    }
-    ts.bindSourceFile = bindSourceFile;
-    function createBinder() {
-        var file;
-        var options;
-        var languageVersion;
-        var parent;
-        var container;
-        var blockScopeContainer;
-        var lastContainer;
-        var seenThisKeyword;
-        // state used by reachability checks
-        var hasExplicitReturn;
-        var currentFlow;
-        var currentBreakTarget;
-        var currentContinueTarget;
-        var currentTrueTarget;
-        var currentFalseTarget;
-        var preSwitchCaseFlow;
-        var activeLabels;
-        // state used for emit helpers
-        var hasClassExtends;
-        var hasAsyncFunctions;
-        var hasDecorators;
-        var hasParameterDecorators;
-        var hasJsxSpreadAttribute;
-        // If this file is an external module, then it is automatically in strict-mode according to
-        // ES6.  If it is not an external module, then we'll determine if it is in strict mode or
-        // not depending on if we see "use strict" in certain places (or if we hit a class/namespace).
-        var inStrictMode;
-        var symbolCount = 0;
-        var Symbol;
-        var classifiableNames;
-        var unreachableFlow = { flags: 1 /* Unreachable */ };
-        var reportedUnreachableFlow = { flags: 1 /* Unreachable */ };
-        function bindSourceFile(f, opts) {
-            file = f;
-            options = opts;
-            languageVersion = ts.getEmitScriptTarget(options);
-            inStrictMode = !!file.externalModuleIndicator;
-            classifiableNames = {};
-            symbolCount = 0;
-            Symbol = ts.objectAllocator.getSymbolConstructor();
-            if (!file.locals) {
-                bind(file);
-                file.symbolCount = symbolCount;
-                file.classifiableNames = classifiableNames;
-            }
-            file = undefined;
-            options = undefined;
-            languageVersion = undefined;
-            parent = undefined;
-            container = undefined;
-            blockScopeContainer = undefined;
-            lastContainer = undefined;
-            seenThisKeyword = false;
-            hasExplicitReturn = false;
-            currentFlow = undefined;
-            currentBreakTarget = undefined;
-            currentContinueTarget = undefined;
-            currentTrueTarget = undefined;
-            currentFalseTarget = undefined;
-            activeLabels = undefined;
-            hasClassExtends = false;
-            hasAsyncFunctions = false;
-            hasDecorators = false;
-            hasParameterDecorators = false;
-            hasJsxSpreadAttribute = false;
-        }
-        return bindSourceFile;
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
-        }
-        function addDeclarationToSymbol(symbol, node, symbolFlags) {
-            symbol.flags |= symbolFlags;
-            node.symbol = symbol;
-            if (!symbol.declarations) {
-                symbol.declarations = [];
-            }
-            symbol.declarations.push(node);
-            if (symbolFlags & 1952 /* HasExports */ && !symbol.exports) {
-                symbol.exports = {};
-            }
-            if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
-                symbol.members = {};
-            }
-            if (symbolFlags & 107455 /* Value */) {
-                var valueDeclaration = symbol.valueDeclaration;
-                if (!valueDeclaration ||
-                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 225 /* ModuleDeclaration */)) {
-                    // other kinds of value declarations take precedence over modules
-                    symbol.valueDeclaration = node;
-                }
-            }
-        }
-        // Should not be called on a declaration with a computed property name,
-        // unless it is a well known Symbol.
-        function getDeclarationName(node) {
-            if (node.name) {
-                if (ts.isAmbientModule(node)) {
-                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
-                }
-                if (node.name.kind === 140 /* ComputedPropertyName */) {
-                    var nameExpression = node.name.expression;
-                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
-                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
-                        return nameExpression.text;
-                    }
-                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
-                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
-                }
-                return node.name.text;
-            }
-            switch (node.kind) {
-                case 148 /* Constructor */:
-                    return "__constructor";
-                case 156 /* FunctionType */:
-                case 151 /* CallSignature */:
-                    return "__call";
-                case 157 /* ConstructorType */:
-                case 152 /* ConstructSignature */:
-                    return "__new";
-                case 153 /* IndexSignature */:
-                    return "__index";
-                case 236 /* ExportDeclaration */:
-                    return "__export";
-                case 235 /* ExportAssignment */:
-                    return node.isExportEquals ? "export=" : "default";
-                case 187 /* BinaryExpression */:
-                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
-                        case 2 /* ModuleExports */:
-                            // module.exports = ...
-                            return "export=";
-                        case 1 /* ExportsProperty */:
-                        case 4 /* ThisProperty */:
-                            // exports.x = ... or this.y = ...
-                            return node.left.name.text;
-                        case 3 /* PrototypeProperty */:
-                            // className.prototype.methodName = ...
-                            return node.left.expression.name.text;
-                    }
-                    ts.Debug.fail("Unknown binary declaration kind");
-                    break;
-                case 220 /* FunctionDeclaration */:
-                case 221 /* ClassDeclaration */:
-                    return node.flags & 512 /* Default */ ? "default" : undefined;
-                case 269 /* JSDocFunctionType */:
-                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
-                case 142 /* Parameter */:
-                    // Parameters with names are handled at the top of this function.  Parameters
-                    // without names can only come from JSDocFunctionTypes.
-                    ts.Debug.assert(node.parent.kind === 269 /* JSDocFunctionType */);
-                    var functionType = node.parent;
-                    var index = ts.indexOf(functionType.parameters, node);
-                    return "p" + index;
-            }
-        }
-        function getDisplayName(node) {
-            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
-        }
-        /**
-         * Declares a Symbol for the node and adds it to symbols. Reports errors for conflicting identifier names.
-         * @param symbolTable - The symbol table which node will be added to.
-         * @param parent - node's parent declaration.
-         * @param node - The declaration to be added to the symbol table
-         * @param includes - The SymbolFlags that node has in addition to its declaration type (eg: export, ambient, etc.)
-         * @param excludes - The flags which node cannot be declared alongside in a symbol table. Used to report forbidden declarations.
-         */
-        function declareSymbol(symbolTable, parent, node, includes, excludes) {
-            ts.Debug.assert(!ts.hasDynamicName(node));
-            var isDefaultExport = node.flags & 512 /* Default */;
-            // The exported symbol for an export default function/class node is always named "default"
-            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
-            var symbol;
-            if (name !== undefined) {
-                // Check and see if the symbol table already has a symbol with this name.  If not,
-                // create a new symbol with this name and add it to the table.  Note that we don't
-                // give the new symbol any flags *yet*.  This ensures that it will not conflict
-                // with the 'excludes' flags we pass in.
-                //
-                // If we do get an existing symbol, see if it conflicts with the new symbol we're
-                // creating.  For example, a 'var' symbol and a 'class' symbol will conflict within
-                // the same symbol table.  If we have a conflict, report the issue on each
-                // declaration we have for this symbol, and then create a new symbol for this
-                // declaration.
-                //
-                // If we created a new symbol, either because we didn't have a symbol with this name
-                // in the symbol table, or we conflicted with an existing symbol, then just add this
-                // node as the sole declaration of the new symbol.
-                //
-                // Otherwise, we'll be merging into a compatible existing symbol (for example when
-                // you have multiple 'vars' with the same name in the same container).  In this case
-                // just add this node into the declarations list of the symbol.
-                symbol = ts.hasProperty(symbolTable, name)
-                    ? symbolTable[name]
-                    : (symbolTable[name] = createSymbol(0 /* None */, name));
-                if (name && (includes & 788448 /* Classifiable */)) {
-                    classifiableNames[name] = name;
-                }
-                if (symbol.flags & excludes) {
-                    if (node.name) {
-                        node.name.parent = node;
-                    }
-                    // Report errors every position with duplicate declaration
-                    // Report errors on previous encountered declarations
-                    var message_1 = symbol.flags & 2 /* BlockScopedVariable */
-                        ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
-                        : ts.Diagnostics.Duplicate_identifier_0;
-                    ts.forEach(symbol.declarations, function (declaration) {
-                        if (declaration.flags & 512 /* Default */) {
-                            message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
-                        }
-                    });
-                    ts.forEach(symbol.declarations, function (declaration) {
-                        file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
-                    });
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
-                    symbol = createSymbol(0 /* None */, name);
-                }
-            }
-            else {
-                symbol = createSymbol(0 /* None */, "__missing");
-            }
-            addDeclarationToSymbol(symbol, node, includes);
-            symbol.parent = parent;
-            return symbol;
-        }
-        function declareModuleMember(node, symbolFlags, symbolExcludes) {
-            var hasExportModifier = ts.getCombinedNodeFlags(node) & 1 /* Export */;
-            if (symbolFlags & 8388608 /* Alias */) {
-                if (node.kind === 238 /* ExportSpecifier */ || (node.kind === 229 /* ImportEqualsDeclaration */ && hasExportModifier)) {
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-                }
-            }
-            else {
-                // Exported module members are given 2 symbols: A local symbol that is classified with an ExportValue,
-                // ExportType, or ExportContainer flag, and an associated export symbol with all the correct flags set
-                // on it. There are 2 main reasons:
-                //
-                //   1. We treat locals and exports of the same name as mutually exclusive within a container.
-                //      That means the binder will issue a Duplicate Identifier error if you mix locals and exports
-                //      with the same name in the same container.
-                //      TODO: Make this a more specific error and decouple it from the exclusion logic.
-                //   2. When we checkIdentifier in the checker, we set its resolved symbol to the local symbol,
-                //      but return the export symbol (by calling getExportSymbolOfValueSymbolIfExported). That way
-                //      when the emitter comes back to it, it knows not to qualify the name if it was found in a containing scope.
-                // NOTE: Nested ambient modules always should go to to 'locals' table to prevent their automatic merge
-                //       during global merging in the checker. Why? The only case when ambient module is permitted inside another module is module augmentation
-                //       and this case is specially handled. Module augmentations should only be merged with original module definition
-                //       and should never be merged directly with other augmentation, and the latter case would be possible if automatic merge is allowed.
-                if (!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 8192 /* ExportContext */)) {
-                    var exportKind = (symbolFlags & 107455 /* Value */ ? 1048576 /* ExportValue */ : 0) |
-                        (symbolFlags & 793056 /* Type */ ? 2097152 /* ExportType */ : 0) |
-                        (symbolFlags & 1536 /* Namespace */ ? 4194304 /* ExportNamespace */ : 0);
-                    var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
-                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                    node.localSymbol = local;
-                    return local;
-                }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-                }
-            }
-        }
-        // All container nodes are kept on a linked list in declaration order. This list is used by
-        // the getLocalNameOfContainer function in the type checker to validate that the local name
-        // used for a container is unique.
-        function bindChildren(node) {
-            // Before we recurse into a node's children, we first save the existing parent, container
-            // and block-container.  Then after we pop out of processing the children, we restore
-            // these saved values.
-            var saveParent = parent;
-            var saveContainer = container;
-            var savedBlockScopeContainer = blockScopeContainer;
-            // This node will now be set as the parent of all of its children as we recurse into them.
-            parent = node;
-            // Depending on what kind of node this is, we may have to adjust the current container
-            // and block-container.   If the current node is a container, then it is automatically
-            // considered the current block-container as well.  Also, for containers that we know
-            // may contain locals, we proactively initialize the .locals field. We do this because
-            // it's highly likely that the .locals will be needed to place some child in (for example,
-            // a parameter, or variable declaration).
-            //
-            // However, we do not proactively create the .locals for block-containers because it's
-            // totally normal and common for block-containers to never actually have a block-scoped
-            // variable in them.  We don't want to end up allocating an object for every 'block' we
-            // run into when most of them won't be necessary.
-            //
-            // Finally, if this is a block-container, then we clear out any existing .locals object
-            // it may contain within it.  This happens in incremental scenarios.  Because we can be
-            // reusing a node from a previous compilation, that node may have had 'locals' created
-            // for it.  We must clear this so we don't accidentally move any stale data forward from
-            // a previous compilation.
-            var containerFlags = getContainerFlags(node);
-            if (containerFlags & 1 /* IsContainer */) {
-                container = blockScopeContainer = node;
-                if (containerFlags & 4 /* HasLocals */) {
-                    container.locals = {};
-                }
-                addToContainerChain(container);
-            }
-            else if (containerFlags & 2 /* IsBlockScopedContainer */) {
-                blockScopeContainer = node;
-                blockScopeContainer.locals = undefined;
-            }
-            var savedHasExplicitReturn;
-            var savedCurrentFlow;
-            var savedBreakTarget;
-            var savedContinueTarget;
-            var savedActiveLabels;
-            var kind = node.kind;
-            var flags = node.flags;
-            // reset all reachability check related flags on node (for incremental scenarios)
-            flags &= ~98304 /* ReachabilityCheckFlags */;
-            // reset all emit helper flags on node (for incremental scenarios)
-            flags &= ~3932160 /* EmitHelperFlags */;
-            if (kind === 222 /* InterfaceDeclaration */) {
-                seenThisKeyword = false;
-            }
-            var saveState = kind === 256 /* SourceFile */ || kind === 226 /* ModuleBlock */ || ts.isFunctionLikeKind(kind);
-            if (saveState) {
-                savedHasExplicitReturn = hasExplicitReturn;
-                savedCurrentFlow = currentFlow;
-                savedBreakTarget = currentBreakTarget;
-                savedContinueTarget = currentContinueTarget;
-                savedActiveLabels = activeLabels;
-                hasExplicitReturn = false;
-                currentFlow = { flags: 2 /* Start */ };
-                currentBreakTarget = undefined;
-                currentContinueTarget = undefined;
-                activeLabels = undefined;
-            }
-            if (ts.isInJavaScriptFile(node) && node.jsDocComment) {
-                bind(node.jsDocComment);
-            }
-            bindReachableStatement(node);
-            if (!(currentFlow.flags & 1 /* Unreachable */) && ts.isFunctionLikeKind(kind) && ts.nodeIsPresent(node.body)) {
-                flags |= 32768 /* HasImplicitReturn */;
-                if (hasExplicitReturn) {
-                    flags |= 65536 /* HasExplicitReturn */;
-                }
-            }
-            if (kind === 222 /* InterfaceDeclaration */) {
-                flags = seenThisKeyword ? flags | 16384 /* ContainsThis */ : flags & ~16384 /* ContainsThis */;
-            }
-            if (kind === 256 /* SourceFile */) {
-                if (hasClassExtends) {
-                    flags |= 262144 /* HasClassExtends */;
-                }
-                if (hasDecorators) {
-                    flags |= 524288 /* HasDecorators */;
-                }
-                if (hasParameterDecorators) {
-                    flags |= 1048576 /* HasParamDecorators */;
-                }
-                if (hasAsyncFunctions) {
-                    flags |= 2097152 /* HasAsyncFunctions */;
-                }
-                if (hasJsxSpreadAttribute) {
-                    flags |= 1073741824 /* HasJsxSpreadAttribute */;
-                }
-            }
-            node.flags = flags;
-            if (saveState) {
-                hasExplicitReturn = savedHasExplicitReturn;
-                currentFlow = savedCurrentFlow;
-                currentBreakTarget = savedBreakTarget;
-                currentContinueTarget = savedContinueTarget;
-                activeLabels = savedActiveLabels;
-            }
-            container = saveContainer;
-            parent = saveParent;
-            blockScopeContainer = savedBlockScopeContainer;
-        }
-        /**
-         * Returns true if node and its subnodes were successfully traversed.
-         * Returning false means that node was not examined and caller needs to dive into the node himself.
-         */
-        function bindReachableStatement(node) {
-            if (checkUnreachable(node)) {
-                ts.forEachChild(node, bind);
-                return;
-            }
-            switch (node.kind) {
-                case 205 /* WhileStatement */:
-                    bindWhileStatement(node);
-                    break;
-                case 204 /* DoStatement */:
-                    bindDoStatement(node);
-                    break;
-                case 206 /* ForStatement */:
-                    bindForStatement(node);
-                    break;
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                    bindForInOrForOfStatement(node);
-                    break;
-                case 203 /* IfStatement */:
-                    bindIfStatement(node);
-                    break;
-                case 211 /* ReturnStatement */:
-                case 215 /* ThrowStatement */:
-                    bindReturnOrThrow(node);
-                    break;
-                case 210 /* BreakStatement */:
-                case 209 /* ContinueStatement */:
-                    bindBreakOrContinueStatement(node);
-                    break;
-                case 216 /* TryStatement */:
-                    bindTryStatement(node);
-                    break;
-                case 213 /* SwitchStatement */:
-                    bindSwitchStatement(node);
-                    break;
-                case 227 /* CaseBlock */:
-                    bindCaseBlock(node);
-                    break;
-                case 214 /* LabeledStatement */:
-                    bindLabeledStatement(node);
-                    break;
-                case 185 /* PrefixUnaryExpression */:
-                    bindPrefixUnaryExpressionFlow(node);
-                    break;
-                case 187 /* BinaryExpression */:
-                    bindBinaryExpressionFlow(node);
-                    break;
-                case 181 /* DeleteExpression */:
-                    bindDeleteExpressionFlow(node);
-                    break;
-                case 188 /* ConditionalExpression */:
-                    bindConditionalExpressionFlow(node);
-                    break;
-                case 218 /* VariableDeclaration */:
-                    bindVariableDeclarationFlow(node);
-                    break;
-                default:
-                    ts.forEachChild(node, bind);
-                    break;
-            }
-        }
-        function isNarrowableReference(expr) {
-            return expr.kind === 69 /* Identifier */ ||
-                expr.kind === 97 /* ThisKeyword */ ||
-                expr.kind === 172 /* PropertyAccessExpression */ && isNarrowableReference(expr.expression);
-        }
-        function isNarrowingExpression(expr) {
-            switch (expr.kind) {
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                case 172 /* PropertyAccessExpression */:
-                    return isNarrowableReference(expr);
-                case 174 /* CallExpression */:
-                    return true;
-                case 178 /* ParenthesizedExpression */:
-                    return isNarrowingExpression(expr.expression);
-                case 187 /* BinaryExpression */:
-                    return isNarrowingBinaryExpression(expr);
-                case 185 /* PrefixUnaryExpression */:
-                    return expr.operator === 49 /* ExclamationToken */ && isNarrowingExpression(expr.operand);
-            }
-            return false;
-        }
-        function isNarrowingBinaryExpression(expr) {
-            switch (expr.operatorToken.kind) {
-                case 56 /* EqualsToken */:
-                    return isNarrowableReference(expr.left);
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                    if (isNarrowingExpression(expr.left) && (expr.right.kind === 93 /* NullKeyword */ || expr.right.kind === 69 /* Identifier */)) {
-                        return true;
-                    }
-                    if (expr.left.kind === 182 /* TypeOfExpression */ && isNarrowingExpression(expr.left.expression) && expr.right.kind === 9 /* StringLiteral */) {
-                        return true;
-                    }
-                    return false;
-                case 91 /* InstanceOfKeyword */:
-                    return isNarrowingExpression(expr.left);
-                case 24 /* CommaToken */:
-                    return isNarrowingExpression(expr.right);
-            }
-            return false;
-        }
-        function createBranchLabel() {
-            return {
-                flags: 4 /* BranchLabel */,
-                antecedents: undefined
-            };
-        }
-        function createLoopLabel() {
-            return {
-                flags: 8 /* LoopLabel */,
-                antecedents: undefined
-            };
-        }
-        function setFlowNodeReferenced(flow) {
-            // On first reference we set the Referenced flag, thereafter we set the Shared flag
-            flow.flags |= flow.flags & 128 /* Referenced */ ? 256 /* Shared */ : 128 /* Referenced */;
-        }
-        function addAntecedent(label, antecedent) {
-            if (!(antecedent.flags & 1 /* Unreachable */) && !ts.contains(label.antecedents, antecedent)) {
-                (label.antecedents || (label.antecedents = [])).push(antecedent);
-                setFlowNodeReferenced(antecedent);
-            }
-        }
-        function createFlowCondition(flags, antecedent, expression) {
-            if (antecedent.flags & 1 /* Unreachable */) {
-                return antecedent;
-            }
-            if (!expression) {
-                return flags & 32 /* TrueCondition */ ? antecedent : unreachableFlow;
-            }
-            if (expression.kind === 99 /* TrueKeyword */ && flags & 64 /* FalseCondition */ ||
-                expression.kind === 84 /* FalseKeyword */ && flags & 32 /* TrueCondition */) {
-                return unreachableFlow;
-            }
-            if (!isNarrowingExpression(expression)) {
-                return antecedent;
-            }
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: flags,
-                antecedent: antecedent,
-                expression: expression
-            };
-        }
-        function createFlowAssignment(antecedent, node) {
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: 16 /* Assignment */,
-                antecedent: antecedent,
-                node: node
-            };
-        }
-        function finishFlowLabel(flow) {
-            var antecedents = flow.antecedents;
-            if (!antecedents) {
-                return unreachableFlow;
-            }
-            if (antecedents.length === 1) {
-                return antecedents[0];
-            }
-            return flow;
-        }
-        function isStatementCondition(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 203 /* IfStatement */:
-                case 205 /* WhileStatement */:
-                case 204 /* DoStatement */:
-                    return parent.expression === node;
-                case 206 /* ForStatement */:
-                case 188 /* ConditionalExpression */:
-                    return parent.condition === node;
-            }
-            return false;
-        }
-        function isLogicalExpression(node) {
-            while (true) {
-                if (node.kind === 178 /* ParenthesizedExpression */) {
-                    node = node.expression;
-                }
-                else if (node.kind === 185 /* PrefixUnaryExpression */ && node.operator === 49 /* ExclamationToken */) {
-                    node = node.operand;
-                }
-                else {
-                    return node.kind === 187 /* BinaryExpression */ && (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */ ||
-                        node.operatorToken.kind === 52 /* BarBarToken */);
-                }
-            }
-        }
-        function isTopLevelLogicalExpression(node) {
-            while (node.parent.kind === 178 /* ParenthesizedExpression */ ||
-                node.parent.kind === 185 /* PrefixUnaryExpression */ &&
-                    node.parent.operator === 49 /* ExclamationToken */) {
-                node = node.parent;
-            }
-            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
-        }
-        function bindCondition(node, trueTarget, falseTarget) {
-            var saveTrueTarget = currentTrueTarget;
-            var saveFalseTarget = currentFalseTarget;
-            currentTrueTarget = trueTarget;
-            currentFalseTarget = falseTarget;
-            bind(node);
-            currentTrueTarget = saveTrueTarget;
-            currentFalseTarget = saveFalseTarget;
-            if (!node || !isLogicalExpression(node)) {
-                addAntecedent(trueTarget, createFlowCondition(32 /* TrueCondition */, currentFlow, node));
-                addAntecedent(falseTarget, createFlowCondition(64 /* FalseCondition */, currentFlow, node));
-            }
-        }
-        function bindIterativeStatement(node, breakTarget, continueTarget) {
-            var saveBreakTarget = currentBreakTarget;
-            var saveContinueTarget = currentContinueTarget;
-            currentBreakTarget = breakTarget;
-            currentContinueTarget = continueTarget;
-            bind(node);
-            currentBreakTarget = saveBreakTarget;
-            currentContinueTarget = saveContinueTarget;
-        }
-        function bindWhileStatement(node) {
-            var preWhileLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postWhileLabel = createBranchLabel();
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = preWhileLabel;
-            bindCondition(node.expression, preBodyLabel, postWhileLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = finishFlowLabel(postWhileLabel);
-        }
-        function bindDoStatement(node) {
-            var preDoLabel = createLoopLabel();
-            var preConditionLabel = createBranchLabel();
-            var postDoLabel = createBranchLabel();
-            addAntecedent(preDoLabel, currentFlow);
-            currentFlow = preDoLabel;
-            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
-            addAntecedent(preConditionLabel, currentFlow);
-            currentFlow = finishFlowLabel(preConditionLabel);
-            bindCondition(node.expression, preDoLabel, postDoLabel);
-            currentFlow = finishFlowLabel(postDoLabel);
-        }
-        function bindForStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postLoopLabel = createBranchLabel();
-            bind(node.initializer);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bindCondition(node.condition, preBodyLabel, postLoopLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            bind(node.incrementor);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindForInOrForOfStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var postLoopLabel = createBranchLabel();
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bind(node.expression);
-            addAntecedent(postLoopLabel, currentFlow);
-            bind(node.initializer);
-            if (node.initializer.kind !== 219 /* VariableDeclarationList */) {
-                bindAssignmentTargetFlow(node.initializer);
-            }
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindIfStatement(node) {
-            var thenLabel = createBranchLabel();
-            var elseLabel = createBranchLabel();
-            var postIfLabel = createBranchLabel();
-            bindCondition(node.expression, thenLabel, elseLabel);
-            currentFlow = finishFlowLabel(thenLabel);
-            bind(node.thenStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(elseLabel);
-            bind(node.elseStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(postIfLabel);
-        }
-        function bindReturnOrThrow(node) {
-            bind(node.expression);
-            if (node.kind === 211 /* ReturnStatement */) {
-                hasExplicitReturn = true;
-            }
-            currentFlow = unreachableFlow;
-        }
-        function findActiveLabel(name) {
-            if (activeLabels) {
-                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
-                    var label = activeLabels_1[_i];
-                    if (label.name === name) {
-                        return label;
-                    }
-                }
-            }
-            return undefined;
-        }
-        function bindbreakOrContinueFlow(node, breakTarget, continueTarget) {
-            var flowLabel = node.kind === 210 /* BreakStatement */ ? breakTarget : continueTarget;
-            if (flowLabel) {
-                addAntecedent(flowLabel, currentFlow);
-                currentFlow = unreachableFlow;
-            }
-        }
-        function bindBreakOrContinueStatement(node) {
-            bind(node.label);
-            if (node.label) {
-                var activeLabel = findActiveLabel(node.label.text);
-                if (activeLabel) {
-                    activeLabel.referenced = true;
-                    bindbreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
-                }
-            }
-            else {
-                bindbreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
-            }
-        }
-        function bindTryStatement(node) {
-            var postFinallyLabel = createBranchLabel();
-            var preTryFlow = currentFlow;
-            // TODO: Every statement in try block is potentially an exit point!
-            bind(node.tryBlock);
-            addAntecedent(postFinallyLabel, currentFlow);
-            if (node.catchClause) {
-                currentFlow = preTryFlow;
-                bind(node.catchClause);
-                addAntecedent(postFinallyLabel, currentFlow);
-            }
-            if (node.finallyBlock) {
-                currentFlow = preTryFlow;
-                bind(node.finallyBlock);
-            }
-            currentFlow = finishFlowLabel(postFinallyLabel);
-        }
-        function bindSwitchStatement(node) {
-            var postSwitchLabel = createBranchLabel();
-            bind(node.expression);
-            var saveBreakTarget = currentBreakTarget;
-            var savePreSwitchCaseFlow = preSwitchCaseFlow;
-            currentBreakTarget = postSwitchLabel;
-            preSwitchCaseFlow = currentFlow;
-            bind(node.caseBlock);
-            addAntecedent(postSwitchLabel, currentFlow);
-            var hasDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 250 /* DefaultClause */; });
-            if (!hasDefault) {
-                addAntecedent(postSwitchLabel, preSwitchCaseFlow);
-            }
-            currentBreakTarget = saveBreakTarget;
-            preSwitchCaseFlow = savePreSwitchCaseFlow;
-            currentFlow = finishFlowLabel(postSwitchLabel);
-        }
-        function bindCaseBlock(node) {
-            var clauses = node.clauses;
-            for (var i = 0; i < clauses.length; i++) {
-                var clause = clauses[i];
-                if (clause.statements.length) {
-                    if (currentFlow.flags & 1 /* Unreachable */) {
-                        currentFlow = preSwitchCaseFlow;
-                    }
-                    else {
-                        var preCaseLabel = createBranchLabel();
-                        addAntecedent(preCaseLabel, preSwitchCaseFlow);
-                        addAntecedent(preCaseLabel, currentFlow);
-                        currentFlow = finishFlowLabel(preCaseLabel);
-                    }
-                    bind(clause);
-                    if (!(currentFlow.flags & 1 /* Unreachable */) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
-                        errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
-                    }
-                }
-                else {
-                    bind(clause);
-                }
-            }
-        }
-        function pushActiveLabel(name, breakTarget, continueTarget) {
-            var activeLabel = {
-                name: name,
-                breakTarget: breakTarget,
-                continueTarget: continueTarget,
-                referenced: false
-            };
-            (activeLabels || (activeLabels = [])).push(activeLabel);
-            return activeLabel;
-        }
-        function popActiveLabel() {
-            activeLabels.pop();
-        }
-        function bindLabeledStatement(node) {
-            var preStatementLabel = createLoopLabel();
-            var postStatementLabel = createBranchLabel();
-            bind(node.label);
-            addAntecedent(preStatementLabel, currentFlow);
-            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
-            bind(node.statement);
-            popActiveLabel();
-            if (!activeLabel.referenced && !options.allowUnusedLabels) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
-            }
-            addAntecedent(postStatementLabel, currentFlow);
-            currentFlow = finishFlowLabel(postStatementLabel);
-        }
-        function bindDestructuringTargetFlow(node) {
-            if (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 56 /* EqualsToken */) {
-                bindAssignmentTargetFlow(node.left);
-            }
-            else {
-                bindAssignmentTargetFlow(node);
-            }
-        }
-        function bindAssignmentTargetFlow(node) {
-            if (isNarrowableReference(node)) {
-                currentFlow = createFlowAssignment(currentFlow, node);
-            }
-            else if (node.kind === 170 /* ArrayLiteralExpression */) {
-                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
-                    var e = _a[_i];
-                    if (e.kind === 191 /* SpreadElementExpression */) {
-                        bindAssignmentTargetFlow(e.expression);
-                    }
-                    else {
-                        bindDestructuringTargetFlow(e);
-                    }
-                }
-            }
-            else if (node.kind === 171 /* ObjectLiteralExpression */) {
-                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
-                    var p = _c[_b];
-                    if (p.kind === 253 /* PropertyAssignment */) {
-                        bindDestructuringTargetFlow(p.initializer);
-                    }
-                    else if (p.kind === 254 /* ShorthandPropertyAssignment */) {
-                        bindAssignmentTargetFlow(p.name);
-                    }
-                }
-            }
-        }
-        function bindLogicalExpression(node, trueTarget, falseTarget) {
-            var preRightLabel = createBranchLabel();
-            if (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */) {
-                bindCondition(node.left, preRightLabel, falseTarget);
-            }
-            else {
-                bindCondition(node.left, trueTarget, preRightLabel);
-            }
-            currentFlow = finishFlowLabel(preRightLabel);
-            bind(node.operatorToken);
-            bindCondition(node.right, trueTarget, falseTarget);
-        }
-        function bindPrefixUnaryExpressionFlow(node) {
-            if (node.operator === 49 /* ExclamationToken */) {
-                var saveTrueTarget = currentTrueTarget;
-                currentTrueTarget = currentFalseTarget;
-                currentFalseTarget = saveTrueTarget;
-                ts.forEachChild(node, bind);
-                currentFalseTarget = currentTrueTarget;
-                currentTrueTarget = saveTrueTarget;
-            }
-            else {
-                ts.forEachChild(node, bind);
-            }
-        }
-        function bindBinaryExpressionFlow(node) {
-            var operator = node.operatorToken.kind;
-            if (operator === 51 /* AmpersandAmpersandToken */ || operator === 52 /* BarBarToken */) {
-                if (isTopLevelLogicalExpression(node)) {
-                    var postExpressionLabel = createBranchLabel();
-                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
-                    currentFlow = finishFlowLabel(postExpressionLabel);
-                }
-                else {
-                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
-                }
-            }
-            else {
-                ts.forEachChild(node, bind);
-                if (operator === 56 /* EqualsToken */ && !ts.isAssignmentTarget(node)) {
-                    bindAssignmentTargetFlow(node.left);
-                }
-            }
-        }
-        function bindDeleteExpressionFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.expression.kind === 172 /* PropertyAccessExpression */) {
-                bindAssignmentTargetFlow(node.expression);
-            }
-        }
-        function bindConditionalExpressionFlow(node) {
-            var trueLabel = createBranchLabel();
-            var falseLabel = createBranchLabel();
-            var postExpressionLabel = createBranchLabel();
-            bindCondition(node.condition, trueLabel, falseLabel);
-            currentFlow = finishFlowLabel(trueLabel);
-            bind(node.whenTrue);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(falseLabel);
-            bind(node.whenFalse);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(postExpressionLabel);
-        }
-        function bindInitializedVariableFlow(node) {
-            var name = node.name;
-            if (ts.isBindingPattern(name)) {
-                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
-                    var child = _a[_i];
-                    bindInitializedVariableFlow(child);
-                }
-            }
-            else {
-                currentFlow = createFlowAssignment(currentFlow, node);
-            }
-        }
-        function bindVariableDeclarationFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.initializer || node.parent.parent.kind === 207 /* ForInStatement */ || node.parent.parent.kind === 208 /* ForOfStatement */) {
-                bindInitializedVariableFlow(node);
-            }
-        }
-        function getContainerFlags(node) {
-            switch (node.kind) {
-                case 192 /* ClassExpression */:
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 171 /* ObjectLiteralExpression */:
-                case 159 /* TypeLiteral */:
-                case 265 /* JSDocRecordType */:
-                    return 1 /* IsContainer */;
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 220 /* FunctionDeclaration */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 156 /* FunctionType */:
-                case 269 /* JSDocFunctionType */:
-                case 157 /* ConstructorType */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                case 225 /* ModuleDeclaration */:
-                case 256 /* SourceFile */:
-                case 223 /* TypeAliasDeclaration */:
-                    return 5 /* IsContainerWithLocals */;
-                case 252 /* CatchClause */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                case 227 /* CaseBlock */:
-                    return 2 /* IsBlockScopedContainer */;
-                case 199 /* Block */:
-                    // do not treat blocks directly inside a function as a block-scoped-container.
-                    // Locals that reside in this block should go to the function locals. Otherwise 'x'
-                    // would not appear to be a redeclaration of a block scoped local in the following
-                    // example:
-                    //
-                    //      function foo() {
-                    //          var x;
-                    //          let x;
-                    //      }
-                    //
-                    // If we placed 'var x' into the function locals and 'let x' into the locals of
-                    // the block, then there would be no collision.
-                    //
-                    // By not creating a new block-scoped-container here, we ensure that both 'var x'
-                    // and 'let x' go into the Function-container's locals, and we do get a collision
-                    // conflict.
-                    return ts.isFunctionLike(node.parent) ? 0 /* None */ : 2 /* IsBlockScopedContainer */;
-            }
-            return 0 /* None */;
-        }
-        function addToContainerChain(next) {
-            if (lastContainer) {
-                lastContainer.nextContainer = next;
-            }
-            lastContainer = next;
-        }
-        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
-            // Just call this directly so that the return type of this function stays "void".
-            declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
-        }
-        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
-            switch (container.kind) {
-                // Modules, source files, and classes need specialized handling for how their
-                // members are declared (for example, a member of a class will go into a specific
-                // symbol table depending on if it is static or not). We defer to specialized
-                // handlers to take care of declaring these child members.
-                case 225 /* ModuleDeclaration */:
-                    return declareModuleMember(node, symbolFlags, symbolExcludes);
-                case 256 /* SourceFile */:
-                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
-                case 192 /* ClassExpression */:
-                case 221 /* ClassDeclaration */:
-                    return declareClassMember(node, symbolFlags, symbolExcludes);
-                case 224 /* EnumDeclaration */:
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                case 159 /* TypeLiteral */:
-                case 171 /* ObjectLiteralExpression */:
-                case 222 /* InterfaceDeclaration */:
-                case 265 /* JSDocRecordType */:
-                    // Interface/Object-types always have their children added to the 'members' of
-                    // their container. They are only accessible through an instance of their
-                    // container, and are never in scope otherwise (even inside the body of the
-                    // object / type / interface declaring them). An exception is type parameters,
-                    // which are in scope without qualification (similar to 'locals').
-                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                case 269 /* JSDocFunctionType */:
-                case 223 /* TypeAliasDeclaration */:
-                    // All the children of these container types are never visible through another
-                    // symbol (i.e. through another symbol's 'exports' or 'members').  Instead,
-                    // they're only accessed 'lexically' (i.e. from code that exists underneath
-                    // their container in the tree.  To accomplish this, we simply add their declared
-                    // symbol to the 'locals' of the container.  These symbols can then be found as
-                    // the type checker walks up the containers, checking them for matching names.
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-            }
-        }
-        function declareClassMember(node, symbolFlags, symbolExcludes) {
-            return node.flags & 32 /* Static */
-                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
-                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
-        }
-        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
-            return ts.isExternalModule(file)
-                ? declareModuleMember(node, symbolFlags, symbolExcludes)
-                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
-        }
-        function hasExportDeclarations(node) {
-            var body = node.kind === 256 /* SourceFile */ ? node : node.body;
-            if (body.kind === 256 /* SourceFile */ || body.kind === 226 /* ModuleBlock */) {
-                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
-                    var stat = _a[_i];
-                    if (stat.kind === 236 /* ExportDeclaration */ || stat.kind === 235 /* ExportAssignment */) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function setExportContextFlag(node) {
-            // A declaration source file or ambient module declaration that contains no export declarations (but possibly regular
-            // declarations with export modifiers) is an export context in which declarations are implicitly exported.
-            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
-                node.flags |= 8192 /* ExportContext */;
-            }
-            else {
-                node.flags &= ~8192 /* ExportContext */;
-            }
-        }
-        function bindModuleDeclaration(node) {
-            setExportContextFlag(node);
-            if (ts.isAmbientModule(node)) {
-                if (node.flags & 1 /* Export */) {
-                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
-                }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    declareSymbolAndAddToSymbolTable(node, 1024 /* NamespaceModule */, 0 /* NamespaceModuleExcludes */);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
-                }
-            }
-            else {
-                var state = getModuleInstanceState(node);
-                if (state === 0 /* NonInstantiated */) {
-                    declareSymbolAndAddToSymbolTable(node, 1024 /* NamespaceModule */, 0 /* NamespaceModuleExcludes */);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
-                    if (node.symbol.flags & (16 /* Function */ | 32 /* Class */ | 256 /* RegularEnum */)) {
-                        // if module was already merged with some function, class or non-const enum
-                        // treat is a non-const-enum-only
-                        node.symbol.constEnumOnlyModule = false;
-                    }
-                    else {
-                        var currentModuleIsConstEnumOnly = state === 2 /* ConstEnumOnly */;
-                        if (node.symbol.constEnumOnlyModule === undefined) {
-                            // non-merged case - use the current state
-                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
-                        }
-                        else {
-                            // merged case: module is const enum only if all its pieces are non-instantiated or const enum
-                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
-                        }
-                    }
-                }
-            }
-        }
-        function bindFunctionOrConstructorType(node) {
-            // For a given function symbol "<...>(...) => T" we want to generate a symbol identical
-            // to the one we would get for: { <...>(...): T }
-            //
-            // We do that by making an anonymous type literal symbol, and then setting the function
-            // symbol as its sole member. To the rest of the system, this symbol will be  indistinguishable
-            // from an actual type literal symbol you would have gotten had you used the long form.
-            var symbol = createSymbol(131072 /* Signature */, getDeclarationName(node));
-            addDeclarationToSymbol(symbol, node, 131072 /* Signature */);
-            var typeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type");
-            addDeclarationToSymbol(typeLiteralSymbol, node, 2048 /* TypeLiteral */);
-            typeLiteralSymbol.members = (_a = {}, _a[symbol.name] = symbol, _a);
-            var _a;
-        }
-        function bindObjectLiteralExpression(node) {
-            var ElementKind;
-            (function (ElementKind) {
-                ElementKind[ElementKind["Property"] = 1] = "Property";
-                ElementKind[ElementKind["Accessor"] = 2] = "Accessor";
-            })(ElementKind || (ElementKind = {}));
-            if (inStrictMode) {
-                var seen = {};
-                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (prop.name.kind !== 69 /* Identifier */) {
-                        continue;
-                    }
-                    var identifier = prop.name;
-                    // ECMA-262 11.1.5 Object Initializer
-                    // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
-                    // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
-                    // IsDataDescriptor(propId.descriptor) is true.
-                    //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
-                    //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
-                    //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
-                    // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
-                    var currentKind = prop.kind === 253 /* PropertyAssignment */ || prop.kind === 254 /* ShorthandPropertyAssignment */ || prop.kind === 147 /* MethodDeclaration */
-                        ? 1 /* Property */
-                        : 2 /* Accessor */;
-                    var existingKind = seen[identifier.text];
-                    if (!existingKind) {
-                        seen[identifier.text] = currentKind;
-                        continue;
-                    }
-                    if (currentKind === 1 /* Property */ && existingKind === 1 /* Property */) {
-                        var span = ts.getErrorSpanForNode(file, identifier);
-                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
-                    }
-                }
-            }
-            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__object");
-        }
-        function bindAnonymousDeclaration(node, symbolFlags, name) {
-            var symbol = createSymbol(symbolFlags, name);
-            addDeclarationToSymbol(symbol, node, symbolFlags);
-        }
-        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
-            switch (blockScopeContainer.kind) {
-                case 225 /* ModuleDeclaration */:
-                    declareModuleMember(node, symbolFlags, symbolExcludes);
-                    break;
-                case 256 /* SourceFile */:
-                    if (ts.isExternalModule(container)) {
-                        declareModuleMember(node, symbolFlags, symbolExcludes);
-                        break;
-                    }
-                // fall through.
-                default:
-                    if (!blockScopeContainer.locals) {
-                        blockScopeContainer.locals = {};
-                        addToContainerChain(blockScopeContainer);
-                    }
-                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
-            }
-        }
-        function bindBlockScopedVariableDeclaration(node) {
-            bindBlockScopedDeclaration(node, 2 /* BlockScopedVariable */, 107455 /* BlockScopedVariableExcludes */);
-        }
-        // The binder visits every node in the syntax tree so it is a convenient place to perform a single localized
-        // check for reserved words used as identifiers in strict mode code.
-        function checkStrictModeIdentifier(node) {
-            if (inStrictMode &&
-                node.originalKeywordKind >= 106 /* FirstFutureReservedWord */ &&
-                node.originalKeywordKind <= 114 /* LastFutureReservedWord */ &&
-                !ts.isIdentifierName(node) &&
-                !ts.isInAmbientContext(node)) {
-                // Report error only if there are no parse errors in file
-                if (!file.parseDiagnostics.length) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
-                }
-            }
-        }
-        function getStrictModeIdentifierMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
-        }
-        function checkStrictModeBinaryExpression(node) {
-            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
-                // ECMA 262 (Annex C) The identifier eval or arguments may not appear as the LeftHandSideExpression of an
-                // Assignment operator(11.13) or of a PostfixExpression(11.3)
-                checkStrictModeEvalOrArguments(node, node.left);
-            }
-        }
-        function checkStrictModeCatchClause(node) {
-            // It is a SyntaxError if a TryStatement with a Catch occurs within strict code and the Identifier of the
-            // Catch production is eval or arguments
-            if (inStrictMode && node.variableDeclaration) {
-                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
-            }
-        }
-        function checkStrictModeDeleteExpression(node) {
-            // Grammar checking
-            if (inStrictMode && node.expression.kind === 69 /* Identifier */) {
-                // When a delete operator occurs within strict mode code, a SyntaxError is thrown if its
-                // UnaryExpression is a direct reference to a variable, function argument, or function name
-                var span = ts.getErrorSpanForNode(file, node.expression);
-                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
-            }
-        }
-        function isEvalOrArgumentsIdentifier(node) {
-            return node.kind === 69 /* Identifier */ &&
-                (node.text === "eval" || node.text === "arguments");
-        }
-        function checkStrictModeEvalOrArguments(contextNode, name) {
-            if (name && name.kind === 69 /* Identifier */) {
-                var identifier = name;
-                if (isEvalOrArgumentsIdentifier(identifier)) {
-                    // We check first if the name is inside class declaration or class expression; if so give explicit message
-                    // otherwise report generic error message.
-                    var span = ts.getErrorSpanForNode(file, name);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
-                }
-            }
-        }
-        function getStrictModeEvalOrArgumentsMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
-        }
-        function checkStrictModeFunctionName(node) {
-            if (inStrictMode) {
-                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a strict mode FunctionDeclaration or FunctionExpression (13.1))
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-        }
-        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
-        }
-        function checkStrictModeFunctionDeclaration(node) {
-            if (languageVersion < 2 /* ES6 */) {
-                // Report error if function is not top level function declaration
-                if (blockScopeContainer.kind !== 256 /* SourceFile */ &&
-                    blockScopeContainer.kind !== 225 /* ModuleDeclaration */ &&
-                    !ts.isFunctionLike(blockScopeContainer)) {
-                    // We check first if the name is inside class declaration or class expression; if so give explicit message
-                    // otherwise report generic error message.
-                    var errorSpan = ts.getErrorSpanForNode(file, node);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
-                }
-            }
-        }
-        function checkStrictModeNumericLiteral(node) {
-            if (inStrictMode && node.isOctalLiteral) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
-            }
-        }
-        function checkStrictModePostfixUnaryExpression(node) {
-            // Grammar checking
-            // The identifier eval or arguments may not appear as the LeftHandSideExpression of an
-            // Assignment operator(11.13) or of a PostfixExpression(11.3) or as the UnaryExpression
-            // operated upon by a Prefix Increment(11.4.4) or a Prefix Decrement(11.4.5) operator.
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.operand);
-            }
-        }
-        function checkStrictModePrefixUnaryExpression(node) {
-            // Grammar checking
-            if (inStrictMode) {
-                if (node.operator === 41 /* PlusPlusToken */ || node.operator === 42 /* MinusMinusToken */) {
-                    checkStrictModeEvalOrArguments(node, node.operand);
-                }
-            }
-        }
-        function checkStrictModeWithStatement(node) {
-            // Grammar checking for withStatement
-            if (inStrictMode) {
-                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
-            }
-        }
-        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
-            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
-        }
-        function getDestructuringParameterName(node) {
-            return "__" + ts.indexOf(node.parent.parameters, node);
-        }
-        function bind(node) {
-            if (!node) {
-                return;
-            }
-            node.parent = parent;
-            var savedInStrictMode = inStrictMode;
-            if (!savedInStrictMode) {
-                updateStrictMode(node);
-            }
-            // First we bind declaration nodes to a symbol if possible.  We'll both create a symbol
-            // and then potentially add the symbol to an appropriate symbol table. Possible
-            // destination symbol tables are:
-            //
-            //  1) The 'exports' table of the current container's symbol.
-            //  2) The 'members' table of the current container's symbol.
-            //  3) The 'locals' table of the current container.
-            //
-            // However, not all symbols will end up in any of these tables.  'Anonymous' symbols
-            // (like TypeLiterals for example) will not be put in any table.
-            bindWorker(node);
-            // Then we recurse into the children of the node to bind them as well.  For certain
-            // symbols we do specialized work when we recurse.  For example, we'll keep track of
-            // the current 'container' node when it changes.  This helps us know which symbol table
-            // a local should go into for example.
-            bindChildren(node);
-            inStrictMode = savedInStrictMode;
-        }
-        function updateStrictMode(node) {
-            switch (node.kind) {
-                case 256 /* SourceFile */:
-                case 226 /* ModuleBlock */:
-                    updateStrictModeStatementList(node.statements);
-                    return;
-                case 199 /* Block */:
-                    if (ts.isFunctionLike(node.parent)) {
-                        updateStrictModeStatementList(node.statements);
-                    }
-                    return;
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
-                    // All classes are automatically in strict mode in ES6.
-                    inStrictMode = true;
-                    return;
-            }
-        }
-        function updateStrictModeStatementList(statements) {
-            for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
-                var statement = statements_1[_i];
-                if (!ts.isPrologueDirective(statement)) {
-                    return;
-                }
-                if (isUseStrictPrologueDirective(statement)) {
-                    inStrictMode = true;
-                    return;
-                }
-            }
-        }
-        /// Should be called only on prologue directives (isPrologueDirective(node) should be true)
-        function isUseStrictPrologueDirective(node) {
-            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
-            // Note: the node text must be exactly "use strict" or 'use strict'.  It is not ok for the
-            // string to contain unicode escapes (as per ES5).
-            return nodeText === '"use strict"' || nodeText === "'use strict'";
-        }
-        function bindWorker(node) {
-            switch (node.kind) {
-                /* Strict mode checks */
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                    if (currentFlow && (ts.isExpression(node) || parent.kind === 254 /* ShorthandPropertyAssignment */)) {
-                        node.flowNode = currentFlow;
-                    }
-                    return checkStrictModeIdentifier(node);
-                case 172 /* PropertyAccessExpression */:
-                    if (currentFlow && isNarrowableReference(node)) {
-                        node.flowNode = currentFlow;
-                    }
-                    break;
-                case 187 /* BinaryExpression */:
-                    if (ts.isInJavaScriptFile(node)) {
-                        var specialKind = ts.getSpecialPropertyAssignmentKind(node);
-                        switch (specialKind) {
-                            case 1 /* ExportsProperty */:
-                                bindExportsPropertyAssignment(node);
-                                break;
-                            case 2 /* ModuleExports */:
-                                bindModuleExportsAssignment(node);
-                                break;
-                            case 3 /* PrototypeProperty */:
-                                bindPrototypePropertyAssignment(node);
-                                break;
-                            case 4 /* ThisProperty */:
-                                bindThisPropertyAssignment(node);
-                                break;
-                            case 0 /* None */:
-                                // Nothing to do
-                                break;
-                            default:
-                                ts.Debug.fail("Unknown special property assignment kind");
-                        }
-                    }
-                    return checkStrictModeBinaryExpression(node);
-                case 252 /* CatchClause */:
-                    return checkStrictModeCatchClause(node);
-                case 181 /* DeleteExpression */:
-                    return checkStrictModeDeleteExpression(node);
-                case 8 /* NumericLiteral */:
-                    return checkStrictModeNumericLiteral(node);
-                case 186 /* PostfixUnaryExpression */:
-                    return checkStrictModePostfixUnaryExpression(node);
-                case 185 /* PrefixUnaryExpression */:
-                    return checkStrictModePrefixUnaryExpression(node);
-                case 212 /* WithStatement */:
-                    return checkStrictModeWithStatement(node);
-                case 165 /* ThisType */:
-                    seenThisKeyword = true;
-                    return;
-                case 154 /* TypePredicate */:
-                    return checkTypePredicate(node);
-                case 141 /* TypeParameter */:
-                    return declareSymbolAndAddToSymbolTable(node, 262144 /* TypeParameter */, 530912 /* TypeParameterExcludes */);
-                case 142 /* Parameter */:
-                    return bindParameter(node);
-                case 218 /* VariableDeclaration */:
-                case 169 /* BindingElement */:
-                    return bindVariableDeclarationOrBindingElement(node);
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 266 /* JSDocRecordMember */:
-                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
-                case 253 /* PropertyAssignment */:
-                case 254 /* ShorthandPropertyAssignment */:
-                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* PropertyExcludes */);
-                case 255 /* EnumMember */:
-                    return bindPropertyOrMethodOrAccessor(node, 8 /* EnumMember */, 107455 /* EnumMemberExcludes */);
-                case 247 /* JsxSpreadAttribute */:
-                    hasJsxSpreadAttribute = true;
-                    return;
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                    return declareSymbolAndAddToSymbolTable(node, 131072 /* Signature */, 0 /* None */);
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    // If this is an ObjectLiteralExpression method, then it sits in the same space
-                    // as other properties in the object literal.  So we use SymbolFlags.PropertyExcludes
-                    // so that it will conflict with any other object literal members with the same
-                    // name.
-                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 0 /* PropertyExcludes */ : 99263 /* MethodExcludes */);
-                case 220 /* FunctionDeclaration */:
-                    return bindFunctionDeclaration(node);
-                case 148 /* Constructor */:
-                    return declareSymbolAndAddToSymbolTable(node, 16384 /* Constructor */, /*symbolExcludes:*/ 0 /* None */);
-                case 149 /* GetAccessor */:
-                    return bindPropertyOrMethodOrAccessor(node, 32768 /* GetAccessor */, 41919 /* GetAccessorExcludes */);
-                case 150 /* SetAccessor */:
-                    return bindPropertyOrMethodOrAccessor(node, 65536 /* SetAccessor */, 74687 /* SetAccessorExcludes */);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 269 /* JSDocFunctionType */:
-                    return bindFunctionOrConstructorType(node);
-                case 159 /* TypeLiteral */:
-                case 265 /* JSDocRecordType */:
-                    return bindAnonymousDeclaration(node, 2048 /* TypeLiteral */, "__type");
-                case 171 /* ObjectLiteralExpression */:
-                    return bindObjectLiteralExpression(node);
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return bindFunctionExpression(node);
-                case 174 /* CallExpression */:
-                    if (ts.isInJavaScriptFile(node)) {
-                        bindCallExpression(node);
-                    }
-                    break;
-                // Members of classes, interfaces, and modules
-                case 192 /* ClassExpression */:
-                case 221 /* ClassDeclaration */:
-                    return bindClassLikeDeclaration(node);
-                case 222 /* InterfaceDeclaration */:
-                    return bindBlockScopedDeclaration(node, 64 /* Interface */, 792960 /* InterfaceExcludes */);
-                case 223 /* TypeAliasDeclaration */:
-                    return bindBlockScopedDeclaration(node, 524288 /* TypeAlias */, 793056 /* TypeAliasExcludes */);
-                case 224 /* EnumDeclaration */:
-                    return bindEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
-                    return bindModuleDeclaration(node);
-                // Imports and exports
-                case 229 /* ImportEqualsDeclaration */:
-                case 232 /* NamespaceImport */:
-                case 234 /* ImportSpecifier */:
-                case 238 /* ExportSpecifier */:
-                    return declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
-                case 228 /* NamespaceExportDeclaration */:
-                    return bindNamespaceExportDeclaration(node);
-                case 231 /* ImportClause */:
-                    return bindImportClause(node);
-                case 236 /* ExportDeclaration */:
-                    return bindExportDeclaration(node);
-                case 235 /* ExportAssignment */:
-                    return bindExportAssignment(node);
-                case 256 /* SourceFile */:
-                    return bindSourceFileIfExternalModule();
-            }
-        }
-        function checkTypePredicate(node) {
-            var parameterName = node.parameterName, type = node.type;
-            if (parameterName && parameterName.kind === 69 /* Identifier */) {
-                checkStrictModeIdentifier(parameterName);
-            }
-            if (parameterName && parameterName.kind === 165 /* ThisType */) {
-                seenThisKeyword = true;
-            }
-            bind(type);
-        }
-        function bindSourceFileIfExternalModule() {
-            setExportContextFlag(file);
-            if (ts.isExternalModule(file)) {
-                bindSourceFileAsExternalModule();
-            }
-        }
-        function bindSourceFileAsExternalModule() {
-            bindAnonymousDeclaration(file, 512 /* ValueModule */, "\"" + ts.removeFileExtension(file.fileName) + "\"");
-        }
-        function bindExportAssignment(node) {
-            var boundExpression = node.kind === 235 /* ExportAssignment */ ? node.expression : node.right;
-            if (!container.symbol || !container.symbol.exports) {
-                // Export assignment in some sort of block construct
-                bindAnonymousDeclaration(node, 8388608 /* Alias */, getDeclarationName(node));
-            }
-            else if (boundExpression.kind === 69 /* Identifier */ && node.kind === 235 /* ExportAssignment */) {
-                // An export default clause with an identifier exports all meanings of that identifier
-                declareSymbol(container.symbol.exports, container.symbol, node, 8388608 /* Alias */, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
-            }
-            else {
-                // An export default clause with an expression exports a value
-                declareSymbol(container.symbol.exports, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
-            }
-        }
-        function bindNamespaceExportDeclaration(node) {
-            if (node.modifiers && node.modifiers.length) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
-            }
-            if (node.parent.kind !== 256 /* SourceFile */) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
-                return;
-            }
-            else {
-                var parent_5 = node.parent;
-                if (!ts.isExternalModule(parent_5)) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
-                    return;
-                }
-                if (!parent_5.isDeclarationFile) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
-                    return;
-                }
-            }
-            file.symbol.globalExports = file.symbol.globalExports || {};
-            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
-        }
-        function bindExportDeclaration(node) {
-            if (!container.symbol || !container.symbol.exports) {
-                // Export * in some sort of block construct
-                bindAnonymousDeclaration(node, 1073741824 /* ExportStar */, getDeclarationName(node));
-            }
-            else if (!node.exportClause) {
-                // All export * declarations are collected in an __export symbol
-                declareSymbol(container.symbol.exports, container.symbol, node, 1073741824 /* ExportStar */, 0 /* None */);
-            }
-        }
-        function bindImportClause(node) {
-            if (node.name) {
-                declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
-            }
-        }
-        function setCommonJsModuleIndicator(node) {
-            if (!file.commonJsModuleIndicator) {
-                file.commonJsModuleIndicator = node;
-                bindSourceFileAsExternalModule();
-            }
-        }
-        function bindExportsPropertyAssignment(node) {
-            // When we create a property via 'exports.foo = bar', the 'exports.foo' property access
-            // expression is the declaration
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 /* Property */ | 7340032 /* Export */, 0 /* None */);
-        }
-        function bindModuleExportsAssignment(node) {
-            // 'module.exports = expr' assignment
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node, 4 /* Property */ | 7340032 /* Export */ | 512 /* ValueModule */, 0 /* None */);
-        }
-        function bindThisPropertyAssignment(node) {
-            // Declare a 'member' in case it turns out the container was an ES5 class
-            if (container.kind === 179 /* FunctionExpression */ || container.kind === 220 /* FunctionDeclaration */) {
-                container.symbol.members = container.symbol.members || {};
-                // It's acceptable for multiple 'this' assignments of the same identifier to occur
-                declareSymbol(container.symbol.members, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ & ~4 /* Property */);
-            }
-        }
-        function bindPrototypePropertyAssignment(node) {
-            // We saw a node of the form 'x.prototype.y = z'. Declare a 'member' y on x if x was a function.
-            // Look up the function in the local scope, since prototype assignments should
-            // follow the function declaration
-            var leftSideOfAssignment = node.left;
-            var classPrototype = leftSideOfAssignment.expression;
-            var constructorFunction = classPrototype.expression;
-            // Fix up parent pointers since we're going to use these nodes before we bind into them
-            leftSideOfAssignment.parent = node;
-            constructorFunction.parent = classPrototype;
-            classPrototype.parent = leftSideOfAssignment;
-            var funcSymbol = container.locals[constructorFunction.text];
-            if (!funcSymbol || !(funcSymbol.flags & 16 /* Function */)) {
-                return;
-            }
-            // Set up the members collection if it doesn't exist already
-            if (!funcSymbol.members) {
-                funcSymbol.members = {};
-            }
-            // Declare the method/property
-            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4 /* Property */, 0 /* PropertyExcludes */);
-        }
-        function bindCallExpression(node) {
-            // We're only inspecting call expressions to detect CommonJS modules, so we can skip
-            // this check if we've already seen the module indicator
-            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ false)) {
-                setCommonJsModuleIndicator(node);
-            }
-        }
-        function bindClassLikeDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.getClassExtendsHeritageClauseElement(node) !== undefined) {
-                    hasClassExtends = true;
-                }
-                if (ts.nodeIsDecorated(node)) {
-                    hasDecorators = true;
-                }
-            }
-            if (node.kind === 221 /* ClassDeclaration */) {
-                bindBlockScopedDeclaration(node, 32 /* Class */, 899519 /* ClassExcludes */);
-            }
-            else {
-                var bindingName = node.name ? node.name.text : "__class";
-                bindAnonymousDeclaration(node, 32 /* Class */, bindingName);
-                // Add name of class expression into the map for semantic classifier
-                if (node.name) {
-                    classifiableNames[node.name.text] = node.name.text;
-                }
-            }
-            var symbol = node.symbol;
-            // TypeScript 1.0 spec (April 2014): 8.4
-            // Every class automatically contains a static property member named 'prototype', the
-            // type of which is an instantiation of the class type with type Any supplied as a type
-            // argument for each type parameter. It is an error to explicitly declare a static
-            // property member with the name 'prototype'.
-            //
-            // Note: we check for this here because this class may be merging into a module.  The
-            // module might have an exported variable called 'prototype'.  We can't allow that as
-            // that would clash with the built-in 'prototype' for the class.
-            var prototypeSymbol = createSymbol(4 /* Property */ | 134217728 /* Prototype */, "prototype");
-            if (ts.hasProperty(symbol.exports, prototypeSymbol.name)) {
-                if (node.name) {
-                    node.name.parent = node;
-                }
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
-            }
-            symbol.exports[prototypeSymbol.name] = prototypeSymbol;
-            prototypeSymbol.parent = symbol;
-        }
-        function bindEnumDeclaration(node) {
-            return ts.isConst(node)
-                ? bindBlockScopedDeclaration(node, 128 /* ConstEnum */, 899967 /* ConstEnumExcludes */)
-                : bindBlockScopedDeclaration(node, 256 /* RegularEnum */, 899327 /* RegularEnumExcludes */);
-        }
-        function bindVariableDeclarationOrBindingElement(node) {
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-            if (!ts.isBindingPattern(node.name)) {
-                if (ts.isBlockOrCatchScoped(node)) {
-                    bindBlockScopedVariableDeclaration(node);
-                }
-                else if (ts.isParameterDeclaration(node)) {
-                    // It is safe to walk up parent chain to find whether the node is a destructing parameter declaration
-                    // because its parent chain has already been set up, since parents are set before descending into children.
-                    //
-                    // If node is a binding element in parameter declaration, we need to use ParameterExcludes.
-                    // Using ParameterExcludes flag allows the compiler to report an error on duplicate identifiers in Parameter Declaration
-                    // For example:
-                    //      function foo([a,a]) {} // Duplicate Identifier error
-                    //      function bar(a,a) {}   // Duplicate Identifier error, parameter declaration in this case is handled in bindParameter
-                    //                             // which correctly set excluded symbols
-                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107454 /* FunctionScopedVariableExcludes */);
-                }
-            }
-        }
-        function bindParameter(node) {
-            if (!ts.isDeclarationFile(file) &&
-                !ts.isInAmbientContext(node) &&
-                ts.nodeIsDecorated(node)) {
-                hasDecorators = true;
-                hasParameterDecorators = true;
-            }
-            if (inStrictMode) {
-                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a
-                // strict mode FunctionLikeDeclaration or FunctionExpression(13.1)
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-            if (ts.isBindingPattern(node.name)) {
-                bindAnonymousDeclaration(node, 1 /* FunctionScopedVariable */, getDestructuringParameterName(node));
-            }
-            else {
-                declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
-            }
-            // If this is a property-parameter, then also declare the property symbol into the
-            // containing class.
-            if (ts.isParameterPropertyDeclaration(node)) {
-                var classDeclaration = node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */);
-            }
-        }
-        function bindFunctionDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-            }
-            checkStrictModeFunctionName(node);
-            if (inStrictMode) {
-                checkStrictModeFunctionDeclaration(node);
-                return bindBlockScopedDeclaration(node, 16 /* Function */, 106927 /* FunctionExcludes */);
-            }
-            else {
-                return declareSymbolAndAddToSymbolTable(node, 16 /* Function */, 106927 /* FunctionExcludes */);
-            }
-        }
-        function bindFunctionExpression(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-            }
-            checkStrictModeFunctionName(node);
-            var bindingName = node.name ? node.name.text : "__function";
-            return bindAnonymousDeclaration(node, 16 /* Function */, bindingName);
-        }
-        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-                if (ts.nodeIsDecorated(node)) {
-                    hasDecorators = true;
-                }
-            }
-            return ts.hasDynamicName(node)
-                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
-                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
-        }
-        // reachability checks
-        function shouldReportErrorOnModuleDeclaration(node) {
-            var instanceState = getModuleInstanceState(node);
-            return instanceState === 1 /* Instantiated */ || (instanceState === 2 /* ConstEnumOnly */ && options.preserveConstEnums);
-        }
-        function checkUnreachable(node) {
-            if (!(currentFlow.flags & 1 /* Unreachable */)) {
-                return false;
-            }
-            if (currentFlow === unreachableFlow) {
-                var reportError = 
-                // report error on all statements except empty ones
-                (ts.isStatement(node) && node.kind !== 201 /* EmptyStatement */) ||
-                    // report error on class declarations
-                    node.kind === 221 /* ClassDeclaration */ ||
-                    // report error on instantiated modules or const-enums only modules if preserveConstEnums is set
-                    (node.kind === 225 /* ModuleDeclaration */ && shouldReportErrorOnModuleDeclaration(node)) ||
-                    // report error on regular enums and const enums if preserveConstEnums is set
-                    (node.kind === 224 /* EnumDeclaration */ && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
-                if (reportError) {
-                    currentFlow = reportedUnreachableFlow;
-                    // unreachable code is reported if
-                    // - user has explicitly asked about it AND
-                    // - statement is in not ambient context (statements in ambient context is already an error
-                    //   so we should not report extras) AND
-                    //   - node is not variable statement OR
-                    //   - node is block scoped variable statement OR
-                    //   - node is not block scoped variable statement and at least one variable declaration has initializer
-                    //   Rationale: we don't want to report errors on non-initialized var's since they are hoisted
-                    //   On the other side we do want to report errors on non-initialized 'lets' because of TDZ
-                    var reportUnreachableCode = !options.allowUnreachableCode &&
-                        !ts.isInAmbientContext(node) &&
-                        (node.kind !== 200 /* VariableStatement */ ||
-                            ts.getCombinedNodeFlags(node.declarationList) & 3072 /* BlockScoped */ ||
-                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
-                    if (reportUnreachableCode) {
-                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
-                    }
-                }
-            }
-            return true;
-        }
-    }
-})(ts || (ts = {}));
-/// <reference path="binder.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var nextSymbolId = 1;
-    var nextNodeId = 1;
-    var nextMergeId = 1;
-    var nextFlowId = 1;
-    function getNodeId(node) {
-        if (!node.id) {
-            node.id = nextNodeId;
-            nextNodeId++;
-        }
-        return node.id;
-    }
-    ts.getNodeId = getNodeId;
-    ts.checkTime = 0;
-    function getSymbolId(symbol) {
-        if (!symbol.id) {
-            symbol.id = nextSymbolId;
-            nextSymbolId++;
-        }
-        return symbol.id;
-    }
-    ts.getSymbolId = getSymbolId;
-    function createTypeChecker(host, produceDiagnostics) {
-        // Cancellation that controls whether or not we can cancel in the middle of type checking.
-        // In general cancelling is *not* safe for the type checker.  We might be in the middle of
-        // computing something, and we will leave our internals in an inconsistent state.  Callers
-        // who set the cancellation token should catch if a cancellation exception occurs, and
-        // should throw away and create a new TypeChecker.
-        //
-        // Currently we only support setting the cancellation token when getting diagnostics.  This
-        // is because diagnostics can be quite expensive, and we want to allow hosts to bail out if
-        // they no longer need the information (for example, if the user started editing again).
-        var cancellationToken;
-        var Symbol = ts.objectAllocator.getSymbolConstructor();
-        var Type = ts.objectAllocator.getTypeConstructor();
-        var Signature = ts.objectAllocator.getSignatureConstructor();
-        var typeCount = 0;
-        var symbolCount = 0;
-        var emptyArray = [];
-        var emptySymbols = {};
-        var compilerOptions = host.getCompilerOptions();
-        var languageVersion = compilerOptions.target || 0 /* ES3 */;
-        var modulekind = ts.getEmitModuleKind(compilerOptions);
-        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
-        var strictNullChecks = compilerOptions.strictNullChecks;
-        var emitResolver = createResolver();
-        var undefinedSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "undefined");
-        undefinedSymbol.declarations = [];
-        var argumentsSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "arguments");
-        var checker = {
-            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
-            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
-            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
-            getTypeCount: function () { return typeCount; },
-            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
-            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
-            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
-            getDiagnostics: getDiagnostics,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getTypeOfSymbolAtLocation: getTypeOfSymbolAtLocation,
-            getSymbolsOfParameterPropertyDeclaration: getSymbolsOfParameterPropertyDeclaration,
-            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
-            getPropertiesOfType: getPropertiesOfType,
-            getPropertyOfType: getPropertyOfType,
-            getSignaturesOfType: getSignaturesOfType,
-            getIndexTypeOfType: getIndexTypeOfType,
-            getBaseTypes: getBaseTypes,
-            getReturnTypeOfSignature: getReturnTypeOfSignature,
-            getNonNullableType: getNonNullableType,
-            getSymbolsInScope: getSymbolsInScope,
-            getSymbolAtLocation: getSymbolAtLocation,
-            getShorthandAssignmentValueSymbol: getShorthandAssignmentValueSymbol,
-            getExportSpecifierLocalTargetSymbol: getExportSpecifierLocalTargetSymbol,
-            getTypeAtLocation: getTypeOfNode,
-            getPropertySymbolOfDestructuringAssignment: getPropertySymbolOfDestructuringAssignment,
-            typeToString: typeToString,
-            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
-            symbolToString: symbolToString,
-            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
-            getRootSymbols: getRootSymbols,
-            getContextualType: getContextualType,
-            getFullyQualifiedName: getFullyQualifiedName,
-            getResolvedSignature: getResolvedSignature,
-            getConstantValue: getConstantValue,
-            isValidPropertyAccess: isValidPropertyAccess,
-            getSignatureFromDeclaration: getSignatureFromDeclaration,
-            isImplementationOfOverload: isImplementationOfOverload,
-            getAliasedSymbol: resolveAlias,
-            getEmitResolver: getEmitResolver,
-            getExportsOfModule: getExportsOfModuleAsArray,
-            getJsxElementAttributesType: getJsxElementAttributesType,
-            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
-            isOptionalParameter: isOptionalParameter
-        };
-        var unknownSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "unknown");
-        var resolvingSymbol = createSymbol(67108864 /* Transient */, "__resolving__");
-        var nullableWideningFlags = strictNullChecks ? 0 : 2097152 /* ContainsUndefinedOrNull */;
-        var anyType = createIntrinsicType(1 /* Any */, "any");
-        var stringType = createIntrinsicType(2 /* String */, "string");
-        var numberType = createIntrinsicType(4 /* Number */, "number");
-        var booleanType = createIntrinsicType(8 /* Boolean */, "boolean");
-        var esSymbolType = createIntrinsicType(16777216 /* ESSymbol */, "symbol");
-        var voidType = createIntrinsicType(16 /* Void */, "void");
-        var undefinedType = createIntrinsicType(32 /* Undefined */ | nullableWideningFlags, "undefined");
-        var nullType = createIntrinsicType(64 /* Null */ | nullableWideningFlags, "null");
-        var emptyArrayElementType = createIntrinsicType(32 /* Undefined */ | 2097152 /* ContainsUndefinedOrNull */, "undefined");
-        var unknownType = createIntrinsicType(1 /* Any */, "unknown");
-        var neverType = createIntrinsicType(134217728 /* Never */, "never");
-        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        emptyGenericType.instantiations = {};
-        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        // The anyFunctionType contains the anyFunctionType by definition. The flag is further propagated
-        // in getPropagatingFlagsOfTypes, and it is checked in inferFromTypes.
-        anyFunctionType.flags |= 8388608 /* ContainsAnyFunctionType */;
-        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasStringLiterals*/ false);
-        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasStringLiterals*/ false);
-        var enumNumberIndexInfo = createIndexInfo(stringType, /*isReadonly*/ true);
-        var globals = {};
-        var getGlobalESSymbolConstructorSymbol;
-        var getGlobalPromiseConstructorSymbol;
-        var globalObjectType;
-        var globalFunctionType;
-        var globalArrayType;
-        var globalReadonlyArrayType;
-        var globalStringType;
-        var globalNumberType;
-        var globalBooleanType;
-        var globalRegExpType;
-        var anyArrayType;
-        var anyReadonlyArrayType;
-        // The library files are only loaded when the feature is used.
-        // This allows users to just specify library files they want to used through --lib
-        // and they will not get an error from not having unrelated library files
-        var getGlobalTemplateStringsArrayType;
-        var getGlobalESSymbolType;
-        var getGlobalIterableType;
-        var getGlobalIteratorType;
-        var getGlobalIterableIteratorType;
-        var getGlobalClassDecoratorType;
-        var getGlobalParameterDecoratorType;
-        var getGlobalPropertyDecoratorType;
-        var getGlobalMethodDecoratorType;
-        var getGlobalTypedPropertyDescriptorType;
-        var getGlobalPromiseType;
-        var tryGetGlobalPromiseType;
-        var getGlobalPromiseLikeType;
-        var getInstantiatedGlobalPromiseLikeType;
-        var getGlobalPromiseConstructorLikeType;
-        var getGlobalThenableType;
-        var jsxElementClassType;
-        var deferredNodes;
-        var flowLoopStart = 0;
-        var flowLoopCount = 0;
-        var visitedFlowCount = 0;
-        var tupleTypes = {};
-        var unionTypes = {};
-        var intersectionTypes = {};
-        var stringLiteralTypes = {};
-        var resolutionTargets = [];
-        var resolutionResults = [];
-        var resolutionPropertyNames = [];
-        var mergedSymbols = [];
-        var symbolLinks = [];
-        var nodeLinks = [];
-        var flowLoopCaches = [];
-        var flowLoopNodes = [];
-        var flowLoopKeys = [];
-        var flowLoopTypes = [];
-        var visitedFlowNodes = [];
-        var visitedFlowTypes = [];
-        var potentialThisCollisions = [];
-        var awaitedTypeStack = [];
-        var diagnostics = ts.createDiagnosticCollection();
-        var TypeFacts;
-        (function (TypeFacts) {
-            TypeFacts[TypeFacts["None"] = 0] = "None";
-            TypeFacts[TypeFacts["TypeofEQString"] = 1] = "TypeofEQString";
-            TypeFacts[TypeFacts["TypeofEQNumber"] = 2] = "TypeofEQNumber";
-            TypeFacts[TypeFacts["TypeofEQBoolean"] = 4] = "TypeofEQBoolean";
-            TypeFacts[TypeFacts["TypeofEQSymbol"] = 8] = "TypeofEQSymbol";
-            TypeFacts[TypeFacts["TypeofEQObject"] = 16] = "TypeofEQObject";
-            TypeFacts[TypeFacts["TypeofEQFunction"] = 32] = "TypeofEQFunction";
-            TypeFacts[TypeFacts["TypeofEQHostObject"] = 64] = "TypeofEQHostObject";
-            TypeFacts[TypeFacts["TypeofNEString"] = 128] = "TypeofNEString";
-            TypeFacts[TypeFacts["TypeofNENumber"] = 256] = "TypeofNENumber";
-            TypeFacts[TypeFacts["TypeofNEBoolean"] = 512] = "TypeofNEBoolean";
-            TypeFacts[TypeFacts["TypeofNESymbol"] = 1024] = "TypeofNESymbol";
-            TypeFacts[TypeFacts["TypeofNEObject"] = 2048] = "TypeofNEObject";
-            TypeFacts[TypeFacts["TypeofNEFunction"] = 4096] = "TypeofNEFunction";
-            TypeFacts[TypeFacts["TypeofNEHostObject"] = 8192] = "TypeofNEHostObject";
-            TypeFacts[TypeFacts["EQUndefined"] = 16384] = "EQUndefined";
-            TypeFacts[TypeFacts["EQNull"] = 32768] = "EQNull";
-            TypeFacts[TypeFacts["EQUndefinedOrNull"] = 65536] = "EQUndefinedOrNull";
-            TypeFacts[TypeFacts["NEUndefined"] = 131072] = "NEUndefined";
-            TypeFacts[TypeFacts["NENull"] = 262144] = "NENull";
-            TypeFacts[TypeFacts["NEUndefinedOrNull"] = 524288] = "NEUndefinedOrNull";
-            TypeFacts[TypeFacts["Truthy"] = 1048576] = "Truthy";
-            TypeFacts[TypeFacts["Falsy"] = 2097152] = "Falsy";
-            TypeFacts[TypeFacts["All"] = 4194303] = "All";
-            // The following members encode facts about particular kinds of types for use in the getTypeFacts function.
-            // The presence of a particular fact means that the given test is true for some (and possibly all) values
-            // of that kind of type.
-            TypeFacts[TypeFacts["StringStrictFacts"] = 4079361] = "StringStrictFacts";
-            TypeFacts[TypeFacts["StringFacts"] = 4194049] = "StringFacts";
-            TypeFacts[TypeFacts["NumberStrictFacts"] = 4079234] = "NumberStrictFacts";
-            TypeFacts[TypeFacts["NumberFacts"] = 4193922] = "NumberFacts";
-            TypeFacts[TypeFacts["BooleanStrictFacts"] = 4078980] = "BooleanStrictFacts";
-            TypeFacts[TypeFacts["BooleanFacts"] = 4193668] = "BooleanFacts";
-            TypeFacts[TypeFacts["SymbolStrictFacts"] = 1981320] = "SymbolStrictFacts";
-            TypeFacts[TypeFacts["SymbolFacts"] = 4193160] = "SymbolFacts";
-            TypeFacts[TypeFacts["ObjectStrictFacts"] = 1972176] = "ObjectStrictFacts";
-            TypeFacts[TypeFacts["ObjectFacts"] = 4184016] = "ObjectFacts";
-            TypeFacts[TypeFacts["FunctionStrictFacts"] = 1970144] = "FunctionStrictFacts";
-            TypeFacts[TypeFacts["FunctionFacts"] = 4181984] = "FunctionFacts";
-            TypeFacts[TypeFacts["UndefinedFacts"] = 2457472] = "UndefinedFacts";
-            TypeFacts[TypeFacts["NullFacts"] = 2340752] = "NullFacts";
-        })(TypeFacts || (TypeFacts = {}));
-        var typeofEQFacts = {
-            "string": 1 /* TypeofEQString */,
-            "number": 2 /* TypeofEQNumber */,
-            "boolean": 4 /* TypeofEQBoolean */,
-            "symbol": 8 /* TypeofEQSymbol */,
-            "undefined": 16384 /* EQUndefined */,
-            "object": 16 /* TypeofEQObject */,
-            "function": 32 /* TypeofEQFunction */
-        };
-        var typeofNEFacts = {
-            "string": 128 /* TypeofNEString */,
-            "number": 256 /* TypeofNENumber */,
-            "boolean": 512 /* TypeofNEBoolean */,
-            "symbol": 1024 /* TypeofNESymbol */,
-            "undefined": 131072 /* NEUndefined */,
-            "object": 2048 /* TypeofNEObject */,
-            "function": 4096 /* TypeofNEFunction */
-        };
-        var typeofTypesByName = {
-            "string": stringType,
-            "number": numberType,
-            "boolean": booleanType,
-            "symbol": esSymbolType,
-            "undefined": undefinedType
-        };
-        var jsxElementType;
-        /** Things we lazy load from the JSX namespace */
-        var jsxTypes = {};
-        var JsxNames = {
-            JSX: "JSX",
-            IntrinsicElements: "IntrinsicElements",
-            ElementClass: "ElementClass",
-            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
-            Element: "Element",
-            IntrinsicAttributes: "IntrinsicAttributes",
-            IntrinsicClassAttributes: "IntrinsicClassAttributes"
-        };
-        var subtypeRelation = {};
-        var assignableRelation = {};
-        var comparableRelation = {};
-        var identityRelation = {};
-        // This is for caching the result of getSymbolDisplayBuilder. Do not access directly.
-        var _displayBuilder;
-        var TypeSystemPropertyName;
-        (function (TypeSystemPropertyName) {
-            TypeSystemPropertyName[TypeSystemPropertyName["Type"] = 0] = "Type";
-            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedBaseConstructorType"] = 1] = "ResolvedBaseConstructorType";
-            TypeSystemPropertyName[TypeSystemPropertyName["DeclaredType"] = 2] = "DeclaredType";
-            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedReturnType"] = 3] = "ResolvedReturnType";
-        })(TypeSystemPropertyName || (TypeSystemPropertyName = {}));
-        var builtinGlobals = (_a = {},
-            _a[undefinedSymbol.name] = undefinedSymbol,
-            _a
-        );
-        initializeTypeChecker();
-        return checker;
-        function getEmitResolver(sourceFile, cancellationToken) {
-            // Ensure we have all the type information in place for this file so that all the
-            // emitter questions of this resolver will return the right information.
-            getDiagnostics(sourceFile, cancellationToken);
-            return emitResolver;
-        }
-        function error(location, message, arg0, arg1, arg2) {
-            var diagnostic = location
-                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
-                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
-            diagnostics.add(diagnostic);
-        }
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
-        }
-        function getExcludedSymbolFlags(flags) {
-            var result = 0;
-            if (flags & 2 /* BlockScopedVariable */)
-                result |= 107455 /* BlockScopedVariableExcludes */;
-            if (flags & 1 /* FunctionScopedVariable */)
-                result |= 107454 /* FunctionScopedVariableExcludes */;
-            if (flags & 4 /* Property */)
-                result |= 0 /* PropertyExcludes */;
-            if (flags & 8 /* EnumMember */)
-                result |= 107455 /* EnumMemberExcludes */;
-            if (flags & 16 /* Function */)
-                result |= 106927 /* FunctionExcludes */;
-            if (flags & 32 /* Class */)
-                result |= 899519 /* ClassExcludes */;
-            if (flags & 64 /* Interface */)
-                result |= 792960 /* InterfaceExcludes */;
-            if (flags & 256 /* RegularEnum */)
-                result |= 899327 /* RegularEnumExcludes */;
-            if (flags & 128 /* ConstEnum */)
-                result |= 899967 /* ConstEnumExcludes */;
-            if (flags & 512 /* ValueModule */)
-                result |= 106639 /* ValueModuleExcludes */;
-            if (flags & 8192 /* Method */)
-                result |= 99263 /* MethodExcludes */;
-            if (flags & 32768 /* GetAccessor */)
-                result |= 41919 /* GetAccessorExcludes */;
-            if (flags & 65536 /* SetAccessor */)
-                result |= 74687 /* SetAccessorExcludes */;
-            if (flags & 262144 /* TypeParameter */)
-                result |= 530912 /* TypeParameterExcludes */;
-            if (flags & 524288 /* TypeAlias */)
-                result |= 793056 /* TypeAliasExcludes */;
-            if (flags & 8388608 /* Alias */)
-                result |= 8388608 /* AliasExcludes */;
-            return result;
-        }
-        function recordMergedSymbol(target, source) {
-            if (!source.mergeId) {
-                source.mergeId = nextMergeId;
-                nextMergeId++;
-            }
-            mergedSymbols[source.mergeId] = target;
-        }
-        function cloneSymbol(symbol) {
-            var result = createSymbol(symbol.flags | 33554432 /* Merged */, symbol.name);
-            result.declarations = symbol.declarations.slice(0);
-            result.parent = symbol.parent;
-            if (symbol.valueDeclaration)
-                result.valueDeclaration = symbol.valueDeclaration;
-            if (symbol.constEnumOnlyModule)
-                result.constEnumOnlyModule = true;
-            if (symbol.members)
-                result.members = cloneSymbolTable(symbol.members);
-            if (symbol.exports)
-                result.exports = cloneSymbolTable(symbol.exports);
-            recordMergedSymbol(result, symbol);
-            return result;
-        }
-        function mergeSymbol(target, source) {
-            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
-                if (source.flags & 512 /* ValueModule */ && target.flags & 512 /* ValueModule */ && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
-                    // reset flag when merging instantiated module into value module that has only const enums
-                    target.constEnumOnlyModule = false;
-                }
-                target.flags |= source.flags;
-                if (source.valueDeclaration &&
-                    (!target.valueDeclaration ||
-                        (target.valueDeclaration.kind === 225 /* ModuleDeclaration */ && source.valueDeclaration.kind !== 225 /* ModuleDeclaration */))) {
-                    // other kinds of value declarations take precedence over modules
-                    target.valueDeclaration = source.valueDeclaration;
-                }
-                ts.forEach(source.declarations, function (node) {
-                    target.declarations.push(node);
-                });
-                if (source.members) {
-                    if (!target.members)
-                        target.members = {};
-                    mergeSymbolTable(target.members, source.members);
-                }
-                if (source.exports) {
-                    if (!target.exports)
-                        target.exports = {};
-                    mergeSymbolTable(target.exports, source.exports);
-                }
-                recordMergedSymbol(target, source);
-            }
-            else {
-                var message_2 = target.flags & 2 /* BlockScopedVariable */ || source.flags & 2 /* BlockScopedVariable */
-                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
-                ts.forEach(source.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
-                ts.forEach(target.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
-            }
-        }
-        function cloneSymbolTable(symbolTable) {
-            var result = {};
-            for (var id in symbolTable) {
-                if (ts.hasProperty(symbolTable, id)) {
-                    result[id] = symbolTable[id];
-                }
-            }
-            return result;
-        }
-        function mergeSymbolTable(target, source) {
-            for (var id in source) {
-                if (ts.hasProperty(source, id)) {
-                    if (!ts.hasProperty(target, id)) {
-                        target[id] = source[id];
-                    }
-                    else {
-                        var symbol = target[id];
-                        if (!(symbol.flags & 33554432 /* Merged */)) {
-                            target[id] = symbol = cloneSymbol(symbol);
-                        }
-                        mergeSymbol(symbol, source[id]);
-                    }
-                }
-            }
-        }
-        function mergeModuleAugmentation(moduleName) {
-            var moduleAugmentation = moduleName.parent;
-            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
-                // this is a combined symbol for multiple augmentations within the same file.
-                // its symbol already has accumulated information for all declarations
-                // so we need to add it just once - do the work only for first declaration
-                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
-                return;
-            }
-            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
-                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
-            }
-            else {
-                // find a module that about to be augmented
-                // do not validate names of augmentations that are defined in ambient context
-                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
-                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
-                    : undefined;
-                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError);
-                if (!mainModule) {
-                    return;
-                }
-                // obtain item referenced by 'export='
-                mainModule = resolveExternalModuleSymbol(mainModule);
-                if (mainModule.flags & 1536 /* Namespace */) {
-                    // if module symbol has already been merged - it is safe to use it.
-                    // otherwise clone it
-                    mainModule = mainModule.flags & 33554432 /* Merged */ ? mainModule : cloneSymbol(mainModule);
-                    mergeSymbol(mainModule, moduleAugmentation.symbol);
-                }
-                else {
-                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
-                }
-            }
-        }
-        function addToSymbolTable(target, source, message) {
-            for (var id in source) {
-                if (ts.hasProperty(source, id)) {
-                    if (ts.hasProperty(target, id)) {
-                        // Error on redeclarations
-                        ts.forEach(target[id].declarations, addDeclarationDiagnostic(id, message));
-                    }
-                    else {
-                        target[id] = source[id];
-                    }
-                }
-            }
-            function addDeclarationDiagnostic(id, message) {
-                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
-            }
-        }
-        function getSymbolLinks(symbol) {
-            if (symbol.flags & 67108864 /* Transient */)
-                return symbol;
-            var id = getSymbolId(symbol);
-            return symbolLinks[id] || (symbolLinks[id] = {});
-        }
-        function getNodeLinks(node) {
-            var nodeId = getNodeId(node);
-            return nodeLinks[nodeId] || (nodeLinks[nodeId] = {});
-        }
-        function isGlobalSourceFile(node) {
-            return node.kind === 256 /* SourceFile */ && !ts.isExternalOrCommonJsModule(node);
-        }
-        function getSymbol(symbols, name, meaning) {
-            if (meaning && ts.hasProperty(symbols, name)) {
-                var symbol = symbols[name];
-                ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
-                if (symbol.flags & meaning) {
-                    return symbol;
-                }
-                if (symbol.flags & 8388608 /* Alias */) {
-                    var target = resolveAlias(symbol);
-                    // Unknown symbol means an error occurred in alias resolution, treat it as positive answer to avoid cascading errors
-                    if (target === unknownSymbol || target.flags & meaning) {
-                        return symbol;
-                    }
-                }
-            }
-            // return undefined if we can't find a symbol.
-        }
-        /**
-         * Get symbols that represent parameter-property-declaration as parameter and as property declaration
-         * @param parameter a parameterDeclaration node
-         * @param parameterName a name of the parameter to get the symbols for.
-         * @return a tuple of two symbols
-         */
-        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
-            var constructorDeclaration = parameter.parent;
-            var classDeclaration = parameter.parent.parent;
-            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455 /* Value */);
-            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455 /* Value */);
-            if (parameterSymbol && propertySymbol) {
-                return [parameterSymbol, propertySymbol];
-            }
-            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
-        }
-        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
-            var declarationFile = ts.getSourceFileOfNode(declaration);
-            var useFile = ts.getSourceFileOfNode(usage);
-            if (declarationFile !== useFile) {
-                if (modulekind || (!compilerOptions.outFile && !compilerOptions.out)) {
-                    // nodes are in different files and order cannot be determines
-                    return true;
-                }
-                var sourceFiles = host.getSourceFiles();
-                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
-            }
-            if (declaration.pos <= usage.pos) {
-                // declaration is before usage
-                // still might be illegal if usage is in the initializer of the variable declaration
-                return declaration.kind !== 218 /* VariableDeclaration */ ||
-                    !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
-            }
-            // declaration is after usage
-            // can be legal if usage is deferred (i.e. inside function or in initializer of instance property)
-            return isUsedInFunctionOrNonStaticProperty(declaration, usage);
-            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                switch (declaration.parent.parent.kind) {
-                    case 200 /* VariableStatement */:
-                    case 206 /* ForStatement */:
-                    case 208 /* ForOfStatement */:
-                        // variable statement/for/for-of statement case,
-                        // use site should not be inside variable declaration (initializer of declaration or binding element)
-                        if (isSameScopeDescendentOf(usage, declaration, container)) {
-                            return true;
-                        }
-                        break;
-                }
-                switch (declaration.parent.parent.kind) {
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                        // ForIn/ForOf case - use site should not be used in expression part
-                        if (isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container)) {
-                            return true;
-                        }
-                }
-                return false;
-            }
-            function isUsedInFunctionOrNonStaticProperty(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                var current = usage;
-                while (current) {
-                    if (current === container) {
-                        return false;
-                    }
-                    if (ts.isFunctionLike(current)) {
-                        return true;
-                    }
-                    var initializerOfNonStaticProperty = current.parent &&
-                        current.parent.kind === 145 /* PropertyDeclaration */ &&
-                        (current.parent.flags & 32 /* Static */) === 0 &&
-                        current.parent.initializer === current;
-                    if (initializerOfNonStaticProperty) {
-                        return true;
-                    }
-                    current = current.parent;
-                }
-                return false;
-            }
-        }
-        // Resolve a given name for a given meaning at a given location. An error is reported if the name was not found and
-        // the nameNotFoundMessage argument is not undefined. Returns the resolved symbol, or undefined if no symbol with
-        // the given name can be found.
-        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg) {
-            var result;
-            var lastLocation;
-            var propertyWithInvalidInitializer;
-            var errorLocation = location;
-            var grandparent;
-            var isInExternalModule = false;
-            loop: while (location) {
-                // Locals of a source file are not in scope (because they get merged into the global symbol table)
-                if (location.locals && !isGlobalSourceFile(location)) {
-                    if (result = getSymbol(location.locals, name, meaning)) {
-                        var useResult = true;
-                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
-                            // symbol lookup restrictions for function-like declarations
-                            // - Type parameters of a function are in scope in the entire function declaration, including the parameter
-                            //   list and return type. However, local types are only in scope in the function body.
-                            // - parameters are only in the scope of function body
-                            // This restriction does not apply to JSDoc comment types because they are parented
-                            // at a higher level than type parameters would normally be
-                            if (meaning & result.flags & 793056 /* Type */ && lastLocation.kind !== 273 /* JSDocComment */) {
-                                useResult = result.flags & 262144 /* TypeParameter */
-                                    ? lastLocation === location.type ||
-                                        lastLocation.kind === 142 /* Parameter */ ||
-                                        lastLocation.kind === 141 /* TypeParameter */
-                                    : false;
-                            }
-                            if (meaning & 107455 /* Value */ && result.flags & 1 /* FunctionScopedVariable */) {
-                                // parameters are visible only inside function body, parameter list and return type
-                                // technically for parameter list case here we might mix parameters and variables declared in function,
-                                // however it is detected separately when checking initializers of parameters
-                                // to make sure that they reference no variables declared after them.
-                                useResult =
-                                    lastLocation.kind === 142 /* Parameter */ ||
-                                        (lastLocation === location.type &&
-                                            result.valueDeclaration.kind === 142 /* Parameter */);
-                            }
-                        }
-                        if (useResult) {
-                            break loop;
-                        }
-                        else {
-                            result = undefined;
-                        }
-                    }
-                }
-                switch (location.kind) {
-                    case 256 /* SourceFile */:
-                        if (!ts.isExternalOrCommonJsModule(location))
-                            break;
-                        isInExternalModule = true;
-                    case 225 /* ModuleDeclaration */:
-                        var moduleExports = getSymbolOfNode(location).exports;
-                        if (location.kind === 256 /* SourceFile */ || ts.isAmbientModule(location)) {
-                            // It's an external module. First see if the module has an export default and if the local
-                            // name of that export default matches.
-                            if (result = moduleExports["default"]) {
-                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
-                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
-                                    break loop;
-                                }
-                                result = undefined;
-                            }
-                            // Because of module/namespace merging, a module's exports are in scope,
-                            // yet we never want to treat an export specifier as putting a member in scope.
-                            // Therefore, if the name we find is purely an export specifier, it is not actually considered in scope.
-                            // Two things to note about this:
-                            //     1. We have to check this without calling getSymbol. The problem with calling getSymbol
-                            //        on an export specifier is that it might find the export specifier itself, and try to
-                            //        resolve it as an alias. This will cause the checker to consider the export specifier
-                            //        a circular alias reference when it might not be.
-                            //     2. We check === SymbolFlags.Alias in order to check that the symbol is *purely*
-                            //        an alias. If we used &, we'd be throwing out symbols that have non alias aspects,
-                            //        which is not the desired behavior.
-                            if (ts.hasProperty(moduleExports, name) &&
-                                moduleExports[name].flags === 8388608 /* Alias */ &&
-                                ts.getDeclarationOfKind(moduleExports[name], 238 /* ExportSpecifier */)) {
-                                break;
-                            }
-                        }
-                        if (result = getSymbol(moduleExports, name, meaning & 8914931 /* ModuleMember */)) {
-                            break loop;
-                        }
-                        break;
-                    case 224 /* EnumDeclaration */:
-                        if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & 8 /* EnumMember */)) {
-                            break loop;
-                        }
-                        break;
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                        // TypeScript 1.0 spec (April 2014): 8.4.1
-                        // Initializer expressions for instance member variables are evaluated in the scope
-                        // of the class constructor body but are not permitted to reference parameters or
-                        // local variables of the constructor. This effectively means that entities from outer scopes
-                        // by the same name as a constructor parameter or local variable are inaccessible
-                        // in initializer expressions for instance member variables.
-                        if (ts.isClassLike(location.parent) && !(location.flags & 32 /* Static */)) {
-                            var ctor = findConstructorDeclaration(location.parent);
-                            if (ctor && ctor.locals) {
-                                if (getSymbol(ctor.locals, name, meaning & 107455 /* Value */)) {
-                                    // Remember the property node, it will be used later to report appropriate error
-                                    propertyWithInvalidInitializer = location;
-                                }
-                            }
-                        }
-                        break;
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                        if (result = getSymbol(getSymbolOfNode(location).members, name, meaning & 793056 /* Type */)) {
-                            if (lastLocation && lastLocation.flags & 32 /* Static */) {
-                                // TypeScript 1.0 spec (April 2014): 3.4.1
-                                // The scope of a type parameter extends over the entire declaration with which the type
-                                // parameter list is associated, with the exception of static member declarations in classes.
-                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
-                                return undefined;
-                            }
-                            break loop;
-                        }
-                        if (location.kind === 192 /* ClassExpression */ && meaning & 32 /* Class */) {
-                            var className = location.name;
-                            if (className && name === className.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    // It is not legal to reference a class's own type parameters from a computed property name that
-                    // belongs to the class. For example:
-                    //
-                    //   function foo<T>() { return '' }
-                    //   class C<T> { // <-- Class's own type parameter T
-                    //       [foo<T>()]() { } // <-- Reference to T from class's own computed property
-                    //   }
-                    //
-                    case 140 /* ComputedPropertyName */:
-                        grandparent = location.parent.parent;
-                        if (ts.isClassLike(grandparent) || grandparent.kind === 222 /* InterfaceDeclaration */) {
-                            // A reference to this grandparent's type parameters would be an error
-                            if (result = getSymbol(getSymbolOfNode(grandparent).members, name, meaning & 793056 /* Type */)) {
-                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
-                                return undefined;
-                            }
-                        }
-                        break;
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 220 /* FunctionDeclaration */:
-                    case 180 /* ArrowFunction */:
-                        if (meaning & 3 /* Variable */ && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        break;
-                    case 179 /* FunctionExpression */:
-                        if (meaning & 3 /* Variable */ && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        if (meaning & 16 /* Function */) {
-                            var functionName = location.name;
-                            if (functionName && name === functionName.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    case 143 /* Decorator */:
-                        // Decorators are resolved at the class declaration. Resolving at the parameter
-                        // or member would result in looking up locals in the method.
-                        //
-                        //   function y() {}
-                        //   class C {
-                        //       method(@y x, y) {} // <-- decorator y should be resolved at the class declaration, not the parameter.
-                        //   }
-                        //
-                        if (location.parent && location.parent.kind === 142 /* Parameter */) {
-                            location = location.parent;
-                        }
-                        //
-                        //   function y() {}
-                        //   class C {
-                        //       @y method(x, y) {} // <-- decorator y should be resolved at the class declaration, not the method.
-                        //   }
-                        //
-                        if (location.parent && ts.isClassElement(location.parent)) {
-                            location = location.parent;
-                        }
-                        break;
-                }
-                lastLocation = location;
-                location = location.parent;
-            }
-            if (!result) {
-                result = getSymbol(globals, name, meaning);
-            }
-            if (!result) {
-                if (nameNotFoundMessage) {
-                    if (!checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg)) {
-                        error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    }
-                }
-                return undefined;
-            }
-            // Perform extra checks only if error reporting was requested
-            if (nameNotFoundMessage) {
-                if (propertyWithInvalidInitializer) {
-                    // We have a match, but the reference occurred within a property initializer and the identifier also binds
-                    // to a local variable in the constructor where the code will be emitted.
-                    var propertyName = propertyWithInvalidInitializer.name;
-                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    return undefined;
-                }
-                // Only check for block-scoped variable if we are looking for the
-                // name with variable meaning
-                //      For example,
-                //          declare module foo {
-                //              interface bar {}
-                //          }
-                //      const foo/*1*/: foo/*2*/.bar;
-                // The foo at /*1*/ and /*2*/ will share same symbol with two meaning
-                // block - scope variable and namespace module. However, only when we
-                // try to resolve name in /*1*/ which is used in variable position,
-                // we want to check for block- scoped
-                if (meaning & 2 /* BlockScopedVariable */) {
-                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
-                    if (exportOrLocalSymbol.flags & 2 /* BlockScopedVariable */) {
-                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
-                    }
-                }
-                // If we're in an external module, we can't reference symbols created from UMD export declarations
-                if (result && isInExternalModule) {
-                    var decls = result.declarations;
-                    if (decls && decls.length === 1 && decls[0].kind === 228 /* NamespaceExportDeclaration */) {
-                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
-                    }
-                }
-            }
-            return result;
-        }
-        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
-            if (!errorLocation || (errorLocation.kind === 69 /* Identifier */ && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
-                return false;
-            }
-            var container = ts.getThisContainer(errorLocation, /* includeArrowFunctions */ true);
-            var location = container;
-            while (location) {
-                if (ts.isClassLike(location.parent)) {
-                    var classSymbol = getSymbolOfNode(location.parent);
-                    if (!classSymbol) {
-                        break;
-                    }
-                    // Check to see if a static member exists.
-                    var constructorType = getTypeOfSymbol(classSymbol);
-                    if (getPropertyOfType(constructorType, name)) {
-                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
-                        return true;
-                    }
-                    // No static member is present.
-                    // Check if we're in an instance method and look for a relevant instance member.
-                    if (location === container && !(location.flags & 32 /* Static */)) {
-                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
-                        if (getPropertyOfType(instanceType, name)) {
-                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                            return true;
-                        }
-                    }
-                }
-                location = location.parent;
-            }
-            return false;
-        }
-        function checkResolvedBlockScopedVariable(result, errorLocation) {
-            ts.Debug.assert((result.flags & 2 /* BlockScopedVariable */) !== 0);
-            // Block-scoped variables cannot be used before their definition
-            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) ? d : undefined; });
-            ts.Debug.assert(declaration !== undefined, "Block-scoped variable declaration is undefined");
-            if (!isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 218 /* VariableDeclaration */), errorLocation)) {
-                error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
-            }
-        }
-        /* Starting from 'initial' node walk up the parent chain until 'stopAt' node is reached.
-         * If at any point current node is equal to 'parent' node - return true.
-         * Return false if 'stopAt' node is reached or isFunctionLike(current) === true.
-         */
-        function isSameScopeDescendentOf(initial, parent, stopAt) {
-            if (!parent) {
-                return false;
-            }
-            for (var current = initial; current && current !== stopAt && !ts.isFunctionLike(current); current = current.parent) {
-                if (current === parent) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function getAnyImportSyntax(node) {
-            if (ts.isAliasSymbolDeclaration(node)) {
-                if (node.kind === 229 /* ImportEqualsDeclaration */) {
-                    return node;
-                }
-                while (node && node.kind !== 230 /* ImportDeclaration */) {
-                    node = node.parent;
-                }
-                return node;
-            }
-        }
-        function getDeclarationOfAliasSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isAliasSymbolDeclaration(d) ? d : undefined; });
-        }
-        function getTargetOfImportEqualsDeclaration(node) {
-            if (node.moduleReference.kind === 240 /* ExternalModuleReference */) {
-                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
-            }
-            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, node);
-        }
-        function getTargetOfImportClause(node) {
-            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
-            if (moduleSymbol) {
-                var exportDefaultSymbol = moduleSymbol.exports["export="] ?
-                    getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
-                    resolveSymbol(moduleSymbol.exports["default"]);
-                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
-                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
-                }
-                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
-                    return resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
-                }
-                return exportDefaultSymbol;
-            }
-        }
-        function getTargetOfNamespaceImport(node) {
-            var moduleSpecifier = node.parent.parent.moduleSpecifier;
-            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier);
-        }
-        // This function creates a synthetic symbol that combines the value side of one symbol with the
-        // type/namespace side of another symbol. Consider this example:
-        //
-        //   declare module graphics {
-        //       interface Point {
-        //           x: number;
-        //           y: number;
-        //       }
-        //   }
-        //   declare var graphics: {
-        //       Point: new (x: number, y: number) => graphics.Point;
-        //   }
-        //   declare module "graphics" {
-        //       export = graphics;
-        //   }
-        //
-        // An 'import { Point } from "graphics"' needs to create a symbol that combines the value side 'Point'
-        // property with the type/namespace side interface 'Point'.
-        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
-            if (valueSymbol.flags & (793056 /* Type */ | 1536 /* Namespace */)) {
-                return valueSymbol;
-            }
-            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
-            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
-            result.parent = valueSymbol.parent || typeSymbol.parent;
-            if (valueSymbol.valueDeclaration)
-                result.valueDeclaration = valueSymbol.valueDeclaration;
-            if (typeSymbol.members)
-                result.members = typeSymbol.members;
-            if (valueSymbol.exports)
-                result.exports = valueSymbol.exports;
-            return result;
-        }
-        function getExportOfModule(symbol, name) {
-            if (symbol.flags & 1536 /* Module */) {
-                var exports = getExportsOfSymbol(symbol);
-                if (ts.hasProperty(exports, name)) {
-                    return resolveSymbol(exports[name]);
-                }
-            }
-        }
-        function getPropertyOfVariable(symbol, name) {
-            if (symbol.flags & 3 /* Variable */) {
-                var typeAnnotation = symbol.valueDeclaration.type;
-                if (typeAnnotation) {
-                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
-                }
-            }
-        }
-        function getExternalModuleMember(node, specifier) {
-            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier);
-            if (targetSymbol) {
-                var name_9 = specifier.propertyName || specifier.name;
-                if (name_9.text) {
-                    var symbolFromVariable = void 0;
-                    // First check if module was specified with "export=". If so, get the member from the resolved type
-                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
-                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_9.text);
-                    }
-                    else {
-                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_9.text);
-                    }
-                    // if symbolFromVariable is export - get its final target
-                    symbolFromVariable = resolveSymbol(symbolFromVariable);
-                    var symbolFromModule = getExportOfModule(targetSymbol, name_9.text);
-                    var symbol = symbolFromModule && symbolFromVariable ?
-                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
-                        symbolFromModule || symbolFromVariable;
-                    if (!symbol) {
-                        error(name_9, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_9));
-                    }
-                    return symbol;
-                }
-            }
-        }
-        function getTargetOfImportSpecifier(node) {
-            return getExternalModuleMember(node.parent.parent.parent, node);
-        }
-        function getTargetOfGlobalModuleExportDeclaration(node) {
-            return resolveExternalModuleSymbol(node.parent.symbol);
-        }
-        function getTargetOfExportSpecifier(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */);
-        }
-        function getTargetOfExportAssignment(node) {
-            return resolveEntityName(node.expression, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */);
-        }
-        function getTargetOfAliasDeclaration(node) {
-            switch (node.kind) {
-                case 229 /* ImportEqualsDeclaration */:
-                    return getTargetOfImportEqualsDeclaration(node);
-                case 231 /* ImportClause */:
-                    return getTargetOfImportClause(node);
-                case 232 /* NamespaceImport */:
-                    return getTargetOfNamespaceImport(node);
-                case 234 /* ImportSpecifier */:
-                    return getTargetOfImportSpecifier(node);
-                case 238 /* ExportSpecifier */:
-                    return getTargetOfExportSpecifier(node);
-                case 235 /* ExportAssignment */:
-                    return getTargetOfExportAssignment(node);
-                case 228 /* NamespaceExportDeclaration */:
-                    return getTargetOfGlobalModuleExportDeclaration(node);
-            }
-        }
-        function resolveSymbol(symbol) {
-            return symbol && symbol.flags & 8388608 /* Alias */ && !(symbol.flags & (107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */)) ? resolveAlias(symbol) : symbol;
-        }
-        function resolveAlias(symbol) {
-            ts.Debug.assert((symbol.flags & 8388608 /* Alias */) !== 0, "Should only get Alias here.");
-            var links = getSymbolLinks(symbol);
-            if (!links.target) {
-                links.target = resolvingSymbol;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                var target = getTargetOfAliasDeclaration(node);
-                if (links.target === resolvingSymbol) {
-                    links.target = target || unknownSymbol;
-                }
-                else {
-                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
-                }
-            }
-            else if (links.target === resolvingSymbol) {
-                links.target = unknownSymbol;
-            }
-            return links.target;
-        }
-        function markExportAsReferenced(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target) {
-                var markAlias = target === unknownSymbol ||
-                    ((target.flags & 107455 /* Value */) && !isConstEnumOrConstEnumOnlyModule(target));
-                if (markAlias) {
-                    markAliasSymbolAsReferenced(symbol);
-                }
-            }
-        }
-        // When an alias symbol is referenced, we need to mark the entity it references as referenced and in turn repeat that until
-        // we reach a non-alias or an exported entity (which is always considered referenced). We do this by checking the target of
-        // the alias as an expression (which recursively takes us back here if the target references another alias).
-        function markAliasSymbolAsReferenced(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.referenced) {
-                links.referenced = true;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                if (node.kind === 235 /* ExportAssignment */) {
-                    // export default <symbol>
-                    checkExpressionCached(node.expression);
-                }
-                else if (node.kind === 238 /* ExportSpecifier */) {
-                    // export { <symbol> } or export { <symbol> as foo }
-                    checkExpressionCached(node.propertyName || node.name);
-                }
-                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    // import foo = <symbol>
-                    checkExpressionCached(node.moduleReference);
-                }
-            }
-        }
-        // This function is only for imports with entity names
-        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importDeclaration) {
-            if (!importDeclaration) {
-                importDeclaration = ts.getAncestor(entityName, 229 /* ImportEqualsDeclaration */);
-                ts.Debug.assert(importDeclaration !== undefined);
-            }
-            // There are three things we might try to look for. In the following examples,
-            // the search term is enclosed in |...|:
-            //
-            //     import a = |b|; // Namespace
-            //     import a = |b.c|; // Value, type, namespace
-            //     import a = |b.c|.d; // Namespace
-            if (entityName.kind === 69 /* Identifier */ && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
-            }
-            // Check for case 1 and 3 in the above example
-            if (entityName.kind === 69 /* Identifier */ || entityName.parent.kind === 139 /* QualifiedName */) {
-                return resolveEntityName(entityName, 1536 /* Namespace */);
-            }
-            else {
-                // Case 2 in above example
-                // entityName.kind could be a QualifiedName or a Missing identifier
-                ts.Debug.assert(entityName.parent.kind === 229 /* ImportEqualsDeclaration */);
-                return resolveEntityName(entityName, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */);
-            }
-        }
-        function getFullyQualifiedName(symbol) {
-            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
-        }
-        // Resolves a qualified name and any involved aliases
-        function resolveEntityName(name, meaning, ignoreErrors) {
-            if (ts.nodeIsMissing(name)) {
-                return undefined;
-            }
-            var symbol;
-            if (name.kind === 69 /* Identifier */) {
-                var message = meaning === 1536 /* Namespace */ ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
-                symbol = resolveName(name, name.text, meaning, ignoreErrors ? undefined : message, name);
-                if (!symbol) {
-                    return undefined;
-                }
-            }
-            else if (name.kind === 139 /* QualifiedName */ || name.kind === 172 /* PropertyAccessExpression */) {
-                var left = name.kind === 139 /* QualifiedName */ ? name.left : name.expression;
-                var right = name.kind === 139 /* QualifiedName */ ? name.right : name.name;
-                var namespace = resolveEntityName(left, 1536 /* Namespace */, ignoreErrors);
-                if (!namespace || namespace === unknownSymbol || ts.nodeIsMissing(right)) {
-                    return undefined;
-                }
-                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
-                if (!symbol) {
-                    if (!ignoreErrors) {
-                        error(right, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
-                    }
-                    return undefined;
-                }
-            }
-            else {
-                ts.Debug.fail("Unknown entity name kind.");
-            }
-            ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
-            return symbol.flags & meaning ? symbol : resolveAlias(symbol);
-        }
-        function resolveExternalModuleName(location, moduleReferenceExpression) {
-            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
-        }
-        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError) {
-            if (moduleReferenceExpression.kind !== 9 /* StringLiteral */) {
-                return;
-            }
-            var moduleReferenceLiteral = moduleReferenceExpression;
-            // Module names are escaped in our symbol table.  However, string literal values aren't.
-            // Escape the name in the "require(...)" clause to ensure we find the right symbol.
-            var moduleName = ts.escapeIdentifier(moduleReferenceLiteral.text);
-            if (moduleName === undefined) {
-                return;
-            }
-            var isRelative = ts.isExternalModuleNameRelative(moduleName);
-            if (!isRelative) {
-                var symbol = getSymbol(globals, '"' + moduleName + '"', 512 /* ValueModule */);
-                if (symbol) {
-                    // merged symbol is module declaration symbol combined with all augmentations
-                    return getMergedSymbol(symbol);
-                }
-            }
-            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReferenceLiteral.text);
-            var sourceFile = resolvedModule && host.getSourceFile(resolvedModule.resolvedFileName);
-            if (sourceFile) {
-                if (sourceFile.symbol) {
-                    // merged symbol is module declaration symbol combined with all augmentations
-                    return getMergedSymbol(sourceFile.symbol);
-                }
-                if (moduleNotFoundError) {
-                    // report errors only if it was requested
-                    error(moduleReferenceLiteral, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
-                }
-                return undefined;
-            }
-            if (moduleNotFoundError) {
-                // report errors only if it was requested
-                error(moduleReferenceLiteral, moduleNotFoundError, moduleName);
-            }
-            return undefined;
-        }
-        // An external module with an 'export =' declaration resolves to the target of the 'export =' declaration,
-        // and an external module with no 'export =' declaration resolves to the module itself.
-        function resolveExternalModuleSymbol(moduleSymbol) {
-            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports["export="])) || moduleSymbol;
-        }
-        // An external module with an 'export =' declaration may be referenced as an ES6 module provided the 'export ='
-        // references a symbol that is at least declared as a module or a variable. The target of the 'export =' may
-        // combine other declarations with the module or variable (e.g. a class/module, function/module, interface/variable).
-        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression) {
-            var symbol = resolveExternalModuleSymbol(moduleSymbol);
-            if (symbol && !(symbol.flags & (1536 /* Module */ | 3 /* Variable */))) {
-                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
-                symbol = undefined;
-            }
-            return symbol;
-        }
-        function hasExportAssignmentSymbol(moduleSymbol) {
-            return moduleSymbol.exports["export="] !== undefined;
-        }
-        function getExportsOfModuleAsArray(moduleSymbol) {
-            return symbolsToArray(getExportsOfModule(moduleSymbol));
-        }
-        function getExportsOfSymbol(symbol) {
-            return symbol.flags & 1536 /* Module */ ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
-        }
-        function getExportsOfModule(moduleSymbol) {
-            var links = getSymbolLinks(moduleSymbol);
-            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
-        }
-        /**
-         * Extends one symbol table with another while collecting information on name collisions for error message generation into the `lookupTable` argument
-         * Not passing `lookupTable` and `exportNode` disables this collection, and just extends the tables
-         */
-        function extendExportSymbols(target, source, lookupTable, exportNode) {
-            for (var id in source) {
-                if (id !== "default" && !ts.hasProperty(target, id)) {
-                    target[id] = source[id];
-                    if (lookupTable && exportNode) {
-                        lookupTable[id] = {
-                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
-                        };
-                    }
-                }
-                else if (lookupTable && exportNode && id !== "default" && ts.hasProperty(target, id) && resolveSymbol(target[id]) !== resolveSymbol(source[id])) {
-                    if (!lookupTable[id].exportsWithDuplicate) {
-                        lookupTable[id].exportsWithDuplicate = [exportNode];
-                    }
-                    else {
-                        lookupTable[id].exportsWithDuplicate.push(exportNode);
-                    }
-                }
-            }
-        }
-        function getExportsForModule(moduleSymbol) {
-            var visitedSymbols = [];
-            return visit(moduleSymbol) || moduleSymbol.exports;
-            // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
-            // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
-            function visit(symbol) {
-                if (!(symbol && symbol.flags & 1952 /* HasExports */ && !ts.contains(visitedSymbols, symbol))) {
-                    return;
-                }
-                visitedSymbols.push(symbol);
-                var symbols = cloneSymbolTable(symbol.exports);
-                // All export * declarations are collected in an __export symbol by the binder
-                var exportStars = symbol.exports["__export"];
-                if (exportStars) {
-                    var nestedSymbols = {};
-                    var lookupTable = {};
-                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
-                        var node = _a[_i];
-                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
-                        var exportedSymbols = visit(resolvedModule);
-                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable, node);
-                    }
-                    for (var id in lookupTable) {
-                        var exportsWithDuplicate = lookupTable[id].exportsWithDuplicate;
-                        // It's not an error if the file with multiple `export *`s with duplicate names exports a member with that name itself
-                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || ts.hasProperty(symbols, id)) {
-                            continue;
-                        }
-                        for (var _b = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _b < exportsWithDuplicate_1.length; _b++) {
-                            var node = exportsWithDuplicate_1[_b];
-                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable[id].specifierText, id));
-                        }
-                    }
-                    extendExportSymbols(symbols, nestedSymbols);
-                }
-                return symbols;
-            }
-        }
-        function getMergedSymbol(symbol) {
-            var merged;
-            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
-        }
-        function getSymbolOfNode(node) {
-            return getMergedSymbol(node.symbol);
-        }
-        function getParentOfSymbol(symbol) {
-            return getMergedSymbol(symbol.parent);
-        }
-        function getExportSymbolOfValueSymbolIfExported(symbol) {
-            return symbol && (symbol.flags & 1048576 /* ExportValue */) !== 0
-                ? getMergedSymbol(symbol.exportSymbol)
-                : symbol;
-        }
-        function symbolIsValue(symbol) {
-            // If it is an instantiated symbol, then it is a value if the symbol it is an
-            // instantiation of is a value.
-            if (symbol.flags & 16777216 /* Instantiated */) {
-                return symbolIsValue(getSymbolLinks(symbol).target);
-            }
-            // If the symbol has the value flag, it is trivially a value.
-            if (symbol.flags & 107455 /* Value */) {
-                return true;
-            }
-            // If it is an alias, then it is a value if the symbol it resolves to is a value.
-            if (symbol.flags & 8388608 /* Alias */) {
-                return (resolveAlias(symbol).flags & 107455 /* Value */) !== 0;
-            }
-            return false;
-        }
-        function findConstructorDeclaration(node) {
-            var members = node.members;
-            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
-                var member = members_1[_i];
-                if (member.kind === 148 /* Constructor */ && ts.nodeIsPresent(member.body)) {
-                    return member;
-                }
-            }
-        }
-        function createType(flags) {
-            var result = new Type(checker, flags);
-            result.id = typeCount;
-            typeCount++;
-            return result;
-        }
-        function createIntrinsicType(kind, intrinsicName) {
-            var type = createType(kind);
-            type.intrinsicName = intrinsicName;
-            return type;
-        }
-        function createObjectType(kind, symbol) {
-            var type = createType(kind);
-            type.symbol = symbol;
-            return type;
-        }
-        // A reserved member name starts with two underscores, but the third character cannot be an underscore
-        // or the @ symbol. A third underscore indicates an escaped form of an identifer that started
-        // with at least two underscores. The @ character indicates that the name is denoted by a well known ES
-        // Symbol instance.
-        function isReservedMemberName(name) {
-            return name.charCodeAt(0) === 95 /* _ */ &&
-                name.charCodeAt(1) === 95 /* _ */ &&
-                name.charCodeAt(2) !== 95 /* _ */ &&
-                name.charCodeAt(2) !== 64 /* at */;
-        }
-        function getNamedMembers(members) {
-            var result;
-            for (var id in members) {
-                if (ts.hasProperty(members, id)) {
-                    if (!isReservedMemberName(id)) {
-                        if (!result)
-                            result = [];
-                        var symbol = members[id];
-                        if (symbolIsValue(symbol)) {
-                            result.push(symbol);
-                        }
-                    }
-                }
-            }
-            return result || emptyArray;
-        }
-        function setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            type.members = members;
-            type.properties = getNamedMembers(members);
-            type.callSignatures = callSignatures;
-            type.constructSignatures = constructSignatures;
-            if (stringIndexInfo)
-                type.stringIndexInfo = stringIndexInfo;
-            if (numberIndexInfo)
-                type.numberIndexInfo = numberIndexInfo;
-            return type;
-        }
-        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            return setObjectTypeMembers(createObjectType(65536 /* Anonymous */, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
-            var result;
-            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
-                // Locals of a source file are not in scope (because they get merged into the global symbol table)
-                if (location_1.locals && !isGlobalSourceFile(location_1)) {
-                    if (result = callback(location_1.locals)) {
-                        return result;
-                    }
-                }
-                switch (location_1.kind) {
-                    case 256 /* SourceFile */:
-                        if (!ts.isExternalOrCommonJsModule(location_1)) {
-                            break;
-                        }
-                    case 225 /* ModuleDeclaration */:
-                        if (result = callback(getSymbolOfNode(location_1).exports)) {
-                            return result;
-                        }
-                        break;
-                }
-            }
-            return callback(globals);
-        }
-        function getQualifiedLeftMeaning(rightMeaning) {
-            // If we are looking in value space, the parent meaning is value, other wise it is namespace
-            return rightMeaning === 107455 /* Value */ ? 107455 /* Value */ : 1536 /* Namespace */;
-        }
-        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
-            function getAccessibleSymbolChainFromSymbolTable(symbols) {
-                function canQualifySymbol(symbolFromSymbolTable, meaning) {
-                    // If the symbol is equivalent and doesn't need further qualification, this symbol is accessible
-                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
-                        return true;
-                    }
-                    // If symbol needs qualification, make sure that parent is accessible, if it is then this symbol is accessible too
-                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
-                    return !!accessibleParent;
-                }
-                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
-                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
-                        // if the symbolFromSymbolTable is not external module (it could be if it was determined as ambient external module and would be in globals table)
-                        // and if symbolFromSymbolTable or alias resolution matches the symbol,
-                        // check the symbol can be qualified, it is only then this symbol is accessible
-                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
-                            canQualifySymbol(symbolFromSymbolTable, meaning);
-                    }
-                }
-                // If symbol is directly available by its name in the symbol table
-                if (isAccessible(ts.lookUp(symbols, symbol.name))) {
-                    return [symbol];
-                }
-                // Check if symbol is any of the alias
-                return ts.forEachValue(symbols, function (symbolFromSymbolTable) {
-                    if (symbolFromSymbolTable.flags & 8388608 /* Alias */
-                        && symbolFromSymbolTable.name !== "export="
-                        && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238 /* ExportSpecifier */)) {
-                        if (!useOnlyExternalAliasing ||
-                            // Is this external alias, then use it to name
-                            ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
-                            var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
-                            if (isAccessible(symbolFromSymbolTable, resolveAlias(symbolFromSymbolTable))) {
-                                return [symbolFromSymbolTable];
-                            }
-                            // Look in the exported members, if we can find accessibleSymbolChain, symbol is accessible using this chain
-                            // but only if the symbolFromSymbolTable can be qualified
-                            var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTable(resolvedImportedSymbol.exports) : undefined;
-                            if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
-                                return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
-                            }
-                        }
-                    }
-                });
-            }
-            if (symbol) {
-                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
-                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
-                }
-            }
-        }
-        function needsQualification(symbol, enclosingDeclaration, meaning) {
-            var qualify = false;
-            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
-                // If symbol of this name is not available in the symbol table we are ok
-                if (!ts.hasProperty(symbolTable, symbol.name)) {
-                    // Continue to the next symbol table
-                    return false;
-                }
-                // If the symbol with this name is present it should refer to the symbol
-                var symbolFromSymbolTable = symbolTable[symbol.name];
-                if (symbolFromSymbolTable === symbol) {
-                    // No need to qualify
-                    return true;
-                }
-                // Qualify if the symbol from symbol table has same meaning as expected
-                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 /* Alias */ && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238 /* ExportSpecifier */)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
-                if (symbolFromSymbolTable.flags & meaning) {
-                    qualify = true;
-                    return true;
-                }
-                // Continue to the next symbol table
-                return false;
-            });
-            return qualify;
-        }
-        function isPropertyOrMethodDeclarationSymbol(symbol) {
-            if (symbol.declarations && symbol.declarations.length) {
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var declaration = _a[_i];
-                    switch (declaration.kind) {
-                        case 145 /* PropertyDeclaration */:
-                        case 147 /* MethodDeclaration */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                            continue;
-                        default:
-                            return false;
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function isSymbolAccessible(symbol, enclosingDeclaration, meaning) {
-            if (symbol && enclosingDeclaration && !(symbol.flags & 262144 /* TypeParameter */)) {
-                var initialSymbol = symbol;
-                var meaningToLook = meaning;
-                while (symbol) {
-                    // Symbol is accessible if it by itself is accessible
-                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, /*useOnlyExternalAliasing*/ false);
-                    if (accessibleSymbolChain) {
-                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0]);
-                        if (!hasAccessibleDeclarations) {
-                            return {
-                                accessibility: 1 /* NotAccessible */,
-                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1536 /* Namespace */) : undefined
-                            };
-                        }
-                        return hasAccessibleDeclarations;
-                    }
-                    // If we haven't got the accessible symbol, it doesn't mean the symbol is actually inaccessible.
-                    // It could be a qualified symbol and hence verify the path
-                    // e.g.:
-                    // module m {
-                    //     export class c {
-                    //     }
-                    // }
-                    // const x: typeof m.c
-                    // In the above example when we start with checking if typeof m.c symbol is accessible,
-                    // we are going to see if c can be accessed in scope directly.
-                    // But it can't, hence the accessible is going to be undefined, but that doesn't mean m.c is inaccessible
-                    // It is accessible if the parent m is accessible because then m.c can be accessed through qualification
-                    meaningToLook = getQualifiedLeftMeaning(meaning);
-                    symbol = getParentOfSymbol(symbol);
-                }
-                // This could be a symbol that is not exported in the external module
-                // or it could be a symbol from different external module that is not aliased and hence cannot be named
-                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
-                if (symbolExternalModule) {
-                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
-                    if (symbolExternalModule !== enclosingExternalModule) {
-                        // name from different external module that is not visible
-                        return {
-                            accessibility: 2 /* CannotBeNamed */,
-                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                            errorModuleName: symbolToString(symbolExternalModule)
-                        };
-                    }
-                }
-                // Just a local name that is not accessible
-                return {
-                    accessibility: 1 /* NotAccessible */,
-                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning)
-                };
-            }
-            return { accessibility: 0 /* Accessible */ };
-            function getExternalModuleContainer(declaration) {
-                for (; declaration; declaration = declaration.parent) {
-                    if (hasExternalModuleSymbol(declaration)) {
-                        return getSymbolOfNode(declaration);
-                    }
-                }
-            }
-        }
-        function hasExternalModuleSymbol(declaration) {
-            return ts.isAmbientModule(declaration) || (declaration.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(declaration));
-        }
-        function hasVisibleDeclarations(symbol) {
-            var aliasesToMakeVisible;
-            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
-                return undefined;
-            }
-            return { accessibility: 0 /* Accessible */, aliasesToMakeVisible: aliasesToMakeVisible };
-            function getIsDeclarationVisible(declaration) {
-                if (!isDeclarationVisible(declaration)) {
-                    // Mark the unexported alias as visible if its parent is visible
-                    // because these kind of aliases can be used to name types in declaration file
-                    var anyImportSyntax = getAnyImportSyntax(declaration);
-                    if (anyImportSyntax &&
-                        !(anyImportSyntax.flags & 1 /* Export */) &&
-                        isDeclarationVisible(anyImportSyntax.parent)) {
-                        getNodeLinks(declaration).isVisible = true;
-                        if (aliasesToMakeVisible) {
-                            if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
-                                aliasesToMakeVisible.push(anyImportSyntax);
-                            }
-                        }
-                        else {
-                            aliasesToMakeVisible = [anyImportSyntax];
-                        }
-                        return true;
-                    }
-                    // Declaration is not visible
-                    return false;
-                }
-                return true;
-            }
-        }
-        function isEntityNameVisible(entityName, enclosingDeclaration) {
-            // get symbol of the first identifier of the entityName
-            var meaning;
-            if (entityName.parent.kind === 158 /* TypeQuery */ || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                // Typeof value
-                meaning = 107455 /* Value */ | 1048576 /* ExportValue */;
-            }
-            else if (entityName.kind === 139 /* QualifiedName */ || entityName.kind === 172 /* PropertyAccessExpression */ ||
-                entityName.parent.kind === 229 /* ImportEqualsDeclaration */) {
-                // Left identifier from type reference or TypeAlias
-                // Entity name of the import declaration
-                meaning = 1536 /* Namespace */;
-            }
-            else {
-                // Type Reference or TypeAlias entity = Identifier
-                meaning = 793056 /* Type */;
-            }
-            var firstIdentifier = getFirstIdentifier(entityName);
-            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
-            // Verify if the symbol is accessible
-            return (symbol && hasVisibleDeclarations(symbol)) || {
-                accessibility: 1 /* NotAccessible */,
-                errorSymbolName: ts.getTextOfNode(firstIdentifier),
-                errorNode: firstIdentifier
-            };
-        }
-        function writeKeyword(writer, kind) {
-            writer.writeKeyword(ts.tokenToString(kind));
-        }
-        function writePunctuation(writer, kind) {
-            writer.writePunctuation(ts.tokenToString(kind));
-        }
-        function writeSpace(writer) {
-            writer.writeSpace(" ");
-        }
-        function symbolToString(symbol, enclosingDeclaration, meaning) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function signatureToString(signature, enclosingDeclaration, flags, kind) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function typeToString(type, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            var maxLength = compilerOptions.noErrorTruncation || flags & 4 /* NoTruncation */ ? undefined : 100;
-            if (maxLength && result.length >= maxLength) {
-                result = result.substr(0, maxLength - "...".length) + "...";
-            }
-            return result;
-        }
-        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function visibilityToString(flags) {
-            if (flags === 8 /* Private */) {
-                return "private";
-            }
-            if (flags === 16 /* Protected */) {
-                return "protected";
-            }
-            return "public";
-        }
-        function getTypeAliasForTypeLiteral(type) {
-            if (type.symbol && type.symbol.flags & 2048 /* TypeLiteral */) {
-                var node = type.symbol.declarations[0].parent;
-                while (node.kind === 164 /* ParenthesizedType */) {
-                    node = node.parent;
-                }
-                if (node.kind === 223 /* TypeAliasDeclaration */) {
-                    return getSymbolOfNode(node);
-                }
-            }
-            return undefined;
-        }
-        function isTopLevelInExternalModuleAugmentation(node) {
-            return node && node.parent &&
-                node.parent.kind === 226 /* ModuleBlock */ &&
-                ts.isExternalModuleAugmentation(node.parent.parent);
-        }
-        function getSymbolDisplayBuilder() {
-            function getNameOfSymbol(symbol) {
-                if (symbol.declarations && symbol.declarations.length) {
-                    var declaration = symbol.declarations[0];
-                    if (declaration.name) {
-                        return ts.declarationNameToString(declaration.name);
-                    }
-                    switch (declaration.kind) {
-                        case 192 /* ClassExpression */:
-                            return "(Anonymous class)";
-                        case 179 /* FunctionExpression */:
-                        case 180 /* ArrowFunction */:
-                            return "(Anonymous function)";
-                    }
-                }
-                return symbol.name;
-            }
-            /**
-             * Writes only the name of the symbol out to the writer. Uses the original source text
-             * for the name of the symbol if it is available to match how the user wrote the name.
-             */
-            function appendSymbolNameOnly(symbol, writer) {
-                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
-            }
-            /**
-             * Writes a property access or element access with the name of the symbol out to the writer.
-             * Uses the original source text for the name of the symbol if it is available to match how the user wrote the name,
-             * ensuring that any names written with literals use element accesses.
-             */
-            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
-                var symbolName = getNameOfSymbol(symbol);
-                var firstChar = symbolName.charCodeAt(0);
-                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
-                if (needsElementAccess) {
-                    writePunctuation(writer, 19 /* OpenBracketToken */);
-                    if (ts.isSingleOrDoubleQuote(firstChar)) {
-                        writer.writeStringLiteral(symbolName);
-                    }
-                    else {
-                        writer.writeSymbol(symbolName, symbol);
-                    }
-                    writePunctuation(writer, 20 /* CloseBracketToken */);
-                }
-                else {
-                    writePunctuation(writer, 21 /* DotToken */);
-                    writer.writeSymbol(symbolName, symbol);
-                }
-            }
-            /**
-             * Enclosing declaration is optional when we don't want to get qualified name in the enclosing declaration scope
-             * Meaning needs to be specified if the enclosing declaration is given
-             */
-            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
-                var parentSymbol;
-                function appendParentTypeArgumentsAndSymbolName(symbol) {
-                    if (parentSymbol) {
-                        // Write type arguments of instantiated class/interface here
-                        if (flags & 1 /* WriteTypeParametersOrArguments */) {
-                            if (symbol.flags & 16777216 /* Instantiated */) {
-                                buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration);
-                            }
-                            else {
-                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
-                            }
-                        }
-                        appendPropertyOrElementAccessForSymbol(symbol, writer);
-                    }
-                    else {
-                        appendSymbolNameOnly(symbol, writer);
-                    }
-                    parentSymbol = symbol;
-                }
-                // const the writer know we just wrote out a symbol.  The declaration emitter writer uses
-                // this to determine if an import it has previously seen (and not written out) needs
-                // to be written to the file once the walk of the tree is complete.
-                //
-                // NOTE(cyrusn): This approach feels somewhat unfortunate.  A simple pass over the tree
-                // up front (for example, during checking) could determine if we need to emit the imports
-                // and we could then access that data during declaration emit.
-                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
-                function walkSymbol(symbol, meaning) {
-                    if (symbol) {
-                        var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2 /* UseOnlyExternalAliasing */));
-                        if (!accessibleSymbolChain ||
-                            needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
-                            // Go up and add our parent.
-                            walkSymbol(getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol), getQualifiedLeftMeaning(meaning));
-                        }
-                        if (accessibleSymbolChain) {
-                            for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
-                                var accessibleSymbol = accessibleSymbolChain_1[_i];
-                                appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
-                            }
-                        }
-                        else {
-                            // If we didn't find accessible symbol chain for this symbol, break if this is external module
-                            if (!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) {
-                                return;
-                            }
-                            // if this is anonymous type break
-                            if (symbol.flags & 2048 /* TypeLiteral */ || symbol.flags & 4096 /* ObjectLiteral */) {
-                                return;
-                            }
-                            appendParentTypeArgumentsAndSymbolName(symbol);
-                        }
-                    }
-                }
-                // Get qualified name if the symbol is not a type parameter
-                // and there is an enclosing declaration or we specifically
-                // asked for it
-                var isTypeParameter = symbol.flags & 262144 /* TypeParameter */;
-                var typeFormatFlag = 128 /* UseFullyQualifiedType */ & typeFlags;
-                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
-                    walkSymbol(symbol, meaning);
-                    return;
-                }
-                return appendParentTypeArgumentsAndSymbolName(symbol);
-            }
-            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
-                var globalFlagsToPass = globalFlags & 16 /* WriteOwnNameForAnyLike */;
-                var inObjectTypeLiteral = false;
-                return writeType(type, globalFlags);
-                function writeType(type, flags) {
-                    // Write undefined/null type as any
-                    if (type.flags & 150995071 /* Intrinsic */) {
-                        // Special handling for unknown / resolving types, they should show up as any and not unknown or __resolving
-                        writer.writeKeyword(!(globalFlags & 16 /* WriteOwnNameForAnyLike */) && isTypeAny(type)
-                            ? "any"
-                            : type.intrinsicName);
-                    }
-                    else if (type.flags & 33554432 /* ThisType */) {
-                        if (inObjectTypeLiteral) {
-                            writer.reportInaccessibleThisError();
-                        }
-                        writer.writeKeyword("this");
-                    }
-                    else if (type.flags & 4096 /* Reference */) {
-                        writeTypeReference(type, flags);
-                    }
-                    else if (type.flags & (1024 /* Class */ | 2048 /* Interface */ | 128 /* Enum */ | 512 /* TypeParameter */)) {
-                        // The specified symbol flags need to be reinterpreted as type flags
-                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793056 /* Type */, 0 /* None */, flags);
-                    }
-                    else if (type.flags & 8192 /* Tuple */) {
-                        writeTupleType(type);
-                    }
-                    else if (type.flags & 49152 /* UnionOrIntersection */) {
-                        writeUnionOrIntersectionType(type, flags);
-                    }
-                    else if (type.flags & 65536 /* Anonymous */) {
-                        writeAnonymousType(type, flags);
-                    }
-                    else if (type.flags & 256 /* StringLiteral */) {
-                        writer.writeStringLiteral("\"" + ts.escapeString(type.text) + "\"");
-                    }
-                    else {
-                        // Should never get here
-                        // { ... }
-                        writePunctuation(writer, 15 /* OpenBraceToken */);
-                        writeSpace(writer);
-                        writePunctuation(writer, 22 /* DotDotDotToken */);
-                        writeSpace(writer);
-                        writePunctuation(writer, 16 /* CloseBraceToken */);
-                    }
-                }
-                function writeTypeList(types, delimiter) {
-                    for (var i = 0; i < types.length; i++) {
-                        if (i > 0) {
-                            if (delimiter !== 24 /* CommaToken */) {
-                                writeSpace(writer);
-                            }
-                            writePunctuation(writer, delimiter);
-                            writeSpace(writer);
-                        }
-                        writeType(types[i], delimiter === 24 /* CommaToken */ ? 0 /* None */ : 64 /* InElementType */);
-                    }
-                }
-                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
-                    // Unnamed function expressions and arrow functions have reserved names that we don't want to display
-                    if (symbol.flags & 32 /* Class */ || !isReservedMemberName(symbol.name)) {
-                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793056 /* Type */, 0 /* None */, flags);
-                    }
-                    if (pos < end) {
-                        writePunctuation(writer, 25 /* LessThanToken */);
-                        writeType(typeArguments[pos], 256 /* InFirstTypeArgument */);
-                        pos++;
-                        while (pos < end) {
-                            writePunctuation(writer, 24 /* CommaToken */);
-                            writeSpace(writer);
-                            writeType(typeArguments[pos], 0 /* None */);
-                            pos++;
-                        }
-                        writePunctuation(writer, 27 /* GreaterThanToken */);
-                    }
-                }
-                function writeTypeReference(type, flags) {
-                    var typeArguments = type.typeArguments || emptyArray;
-                    if (type.target === globalArrayType && !(flags & 1 /* WriteArrayAsGenericType */)) {
-                        writeType(typeArguments[0], 64 /* InElementType */);
-                        writePunctuation(writer, 19 /* OpenBracketToken */);
-                        writePunctuation(writer, 20 /* CloseBracketToken */);
-                    }
-                    else {
-                        // Write the type reference in the format f<A>.g<B>.C<X, Y> where A and B are type arguments
-                        // for outer type parameters, and f and g are the respective declaring containers of those
-                        // type parameters.
-                        var outerTypeParameters = type.target.outerTypeParameters;
-                        var i = 0;
-                        if (outerTypeParameters) {
-                            var length_1 = outerTypeParameters.length;
-                            while (i < length_1) {
-                                // Find group of type arguments for type parameters with the same declaring container.
-                                var start = i;
-                                var parent_6 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
-                                do {
-                                    i++;
-                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_6);
-                                // When type parameters are their own type arguments for the whole group (i.e. we have
-                                // the default outer type arguments), we don't show the group.
-                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
-                                    writeSymbolTypeReference(parent_6, typeArguments, start, i, flags);
-                                    writePunctuation(writer, 21 /* DotToken */);
-                                }
-                            }
-                        }
-                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
-                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
-                    }
-                }
-                function writeTupleType(type) {
-                    writePunctuation(writer, 19 /* OpenBracketToken */);
-                    writeTypeList(type.elementTypes, 24 /* CommaToken */);
-                    writePunctuation(writer, 20 /* CloseBracketToken */);
-                }
-                function writeUnionOrIntersectionType(type, flags) {
-                    if (flags & 64 /* InElementType */) {
-                        writePunctuation(writer, 17 /* OpenParenToken */);
-                    }
-                    writeTypeList(type.types, type.flags & 16384 /* Union */ ? 47 /* BarToken */ : 46 /* AmpersandToken */);
-                    if (flags & 64 /* InElementType */) {
-                        writePunctuation(writer, 18 /* CloseParenToken */);
-                    }
-                }
-                function writeAnonymousType(type, flags) {
-                    var symbol = type.symbol;
-                    if (symbol) {
-                        // Always use 'typeof T' for type of class, enum, and module objects
-                        if (symbol.flags & (32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
-                            writeTypeOfSymbol(type, flags);
-                        }
-                        else if (shouldWriteTypeOfFunctionSymbol()) {
-                            writeTypeOfSymbol(type, flags);
-                        }
-                        else if (ts.contains(symbolStack, symbol)) {
-                            // If type is an anonymous type literal in a type alias declaration, use type alias name
-                            var typeAlias = getTypeAliasForTypeLiteral(type);
-                            if (typeAlias) {
-                                // The specified symbol flags need to be reinterpreted as type flags
-                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793056 /* Type */, 0 /* None */, flags);
-                            }
-                            else {
-                                // Recursive usage, use any
-                                writeKeyword(writer, 117 /* AnyKeyword */);
-                            }
-                        }
-                        else {
-                            // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
-                            // of types allows us to catch circular references to instantiations of the same anonymous type
-                            if (!symbolStack) {
-                                symbolStack = [];
-                            }
-                            symbolStack.push(symbol);
-                            writeLiteralType(type, flags);
-                            symbolStack.pop();
-                        }
-                    }
-                    else {
-                        // Anonymous types with no symbol are never circular
-                        writeLiteralType(type, flags);
-                    }
-                    function shouldWriteTypeOfFunctionSymbol() {
-                        var isStaticMethodSymbol = !!(symbol.flags & 8192 /* Method */ &&
-                            ts.forEach(symbol.declarations, function (declaration) { return declaration.flags & 32 /* Static */; }));
-                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16 /* Function */) &&
-                            (symbol.parent ||
-                                ts.forEach(symbol.declarations, function (declaration) {
-                                    return declaration.parent.kind === 256 /* SourceFile */ || declaration.parent.kind === 226 /* ModuleBlock */;
-                                }));
-                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
-                            // typeof is allowed only for static/non local functions
-                            return !!(flags & 2 /* UseTypeOfFunction */) ||
-                                (ts.contains(symbolStack, symbol)); // it is type of the symbol uses itself recursively
-                        }
-                    }
-                }
-                function writeTypeOfSymbol(type, typeFormatFlags) {
-                    writeKeyword(writer, 101 /* TypeOfKeyword */);
-                    writeSpace(writer);
-                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455 /* Value */, 0 /* None */, typeFormatFlags);
-                }
-                function writeIndexSignature(info, keyword) {
-                    if (info) {
-                        if (info.isReadonly) {
-                            writeKeyword(writer, 128 /* ReadonlyKeyword */);
-                            writeSpace(writer);
-                        }
-                        writePunctuation(writer, 19 /* OpenBracketToken */);
-                        writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
-                        writePunctuation(writer, 54 /* ColonToken */);
-                        writeSpace(writer);
-                        writeKeyword(writer, keyword);
-                        writePunctuation(writer, 20 /* CloseBracketToken */);
-                        writePunctuation(writer, 54 /* ColonToken */);
-                        writeSpace(writer);
-                        writeType(info.type, 0 /* None */);
-                        writePunctuation(writer, 23 /* SemicolonToken */);
-                        writer.writeLine();
-                    }
-                }
-                function writePropertyWithModifiers(prop) {
-                    if (isReadonlySymbol(prop)) {
-                        writeKeyword(writer, 128 /* ReadonlyKeyword */);
-                        writeSpace(writer);
-                    }
-                    buildSymbolDisplay(prop, writer);
-                    if (prop.flags & 536870912 /* Optional */) {
-                        writePunctuation(writer, 53 /* QuestionToken */);
-                    }
-                }
-                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
-                    if (flags & 64 /* InElementType */) {
-                        return true;
-                    }
-                    else if (flags & 256 /* InFirstTypeArgument */) {
-                        // Add parenthesis around function type for the first type argument to avoid ambiguity
-                        var typeParameters = callSignature.target && (flags & 32 /* WriteTypeArgumentsOfSignature */) ?
-                            callSignature.target.typeParameters : callSignature.typeParameters;
-                        return typeParameters && typeParameters.length !== 0;
-                    }
-                    return false;
-                }
-                function writeLiteralType(type, flags) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
-                            writePunctuation(writer, 15 /* OpenBraceToken */);
-                            writePunctuation(writer, 16 /* CloseBraceToken */);
-                            return;
-                        }
-                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
-                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 17 /* OpenParenToken */);
-                            }
-                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 18 /* CloseParenToken */);
-                            }
-                            return;
-                        }
-                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
-                            if (flags & 64 /* InElementType */) {
-                                writePunctuation(writer, 17 /* OpenParenToken */);
-                            }
-                            writeKeyword(writer, 92 /* NewKeyword */);
-                            writeSpace(writer);
-                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
-                            if (flags & 64 /* InElementType */) {
-                                writePunctuation(writer, 18 /* CloseParenToken */);
-                            }
-                            return;
-                        }
-                    }
-                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
-                    inObjectTypeLiteral = true;
-                    writePunctuation(writer, 15 /* OpenBraceToken */);
-                    writer.writeLine();
-                    writer.increaseIndent();
-                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
-                        var signature = _a[_i];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
-                        writePunctuation(writer, 23 /* SemicolonToken */);
-                        writer.writeLine();
-                    }
-                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
-                        var signature = _c[_b];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1 /* Construct */, symbolStack);
-                        writePunctuation(writer, 23 /* SemicolonToken */);
-                        writer.writeLine();
-                    }
-                    writeIndexSignature(resolved.stringIndexInfo, 132 /* StringKeyword */);
-                    writeIndexSignature(resolved.numberIndexInfo, 130 /* NumberKeyword */);
-                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
-                        var p = _e[_d];
-                        var t = getTypeOfSymbol(p);
-                        if (p.flags & (16 /* Function */ | 8192 /* Method */) && !getPropertiesOfObjectType(t).length) {
-                            var signatures = getSignaturesOfType(t, 0 /* Call */);
-                            for (var _f = 0, signatures_1 = signatures; _f < signatures_1.length; _f++) {
-                                var signature = signatures_1[_f];
-                                writePropertyWithModifiers(p);
-                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
-                                writePunctuation(writer, 23 /* SemicolonToken */);
-                                writer.writeLine();
-                            }
-                        }
-                        else {
-                            writePropertyWithModifiers(p);
-                            writePunctuation(writer, 54 /* ColonToken */);
-                            writeSpace(writer);
-                            writeType(t, 0 /* None */);
-                            writePunctuation(writer, 23 /* SemicolonToken */);
-                            writer.writeLine();
-                        }
-                    }
-                    writer.decreaseIndent();
-                    writePunctuation(writer, 16 /* CloseBraceToken */);
-                    inObjectTypeLiteral = saveInObjectTypeLiteral;
-                }
-            }
-            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
-                var targetSymbol = getTargetSymbol(symbol);
-                if (targetSymbol.flags & 32 /* Class */ || targetSymbol.flags & 64 /* Interface */ || targetSymbol.flags & 524288 /* TypeAlias */) {
-                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
-                }
-            }
-            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
-                appendSymbolNameOnly(tp.symbol, writer);
-                var constraint = getConstraintOfTypeParameter(tp);
-                if (constraint) {
-                    writeSpace(writer);
-                    writeKeyword(writer, 83 /* ExtendsKeyword */);
-                    writeSpace(writer);
-                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
-                }
-            }
-            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
-                var parameterNode = p.valueDeclaration;
-                if (ts.isRestParameter(parameterNode)) {
-                    writePunctuation(writer, 22 /* DotDotDotToken */);
-                }
-                if (ts.isBindingPattern(parameterNode.name)) {
-                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    appendSymbolNameOnly(p, writer);
-                }
-                if (isOptionalParameter(parameterNode)) {
-                    writePunctuation(writer, 53 /* QuestionToken */);
-                }
-                writePunctuation(writer, 54 /* ColonToken */);
-                writeSpace(writer);
-                buildTypeDisplay(getTypeOfSymbol(p), writer, enclosingDeclaration, flags, symbolStack);
-            }
-            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
-                // We have to explicitly emit square bracket and bracket because these tokens are not stored inside the node.
-                if (bindingPattern.kind === 167 /* ObjectBindingPattern */) {
-                    writePunctuation(writer, 15 /* OpenBraceToken */);
-                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 16 /* CloseBraceToken */);
-                }
-                else if (bindingPattern.kind === 168 /* ArrayBindingPattern */) {
-                    writePunctuation(writer, 19 /* OpenBracketToken */);
-                    var elements = bindingPattern.elements;
-                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    if (elements && elements.hasTrailingComma) {
-                        writePunctuation(writer, 24 /* CommaToken */);
-                    }
-                    writePunctuation(writer, 20 /* CloseBracketToken */);
-                }
-            }
-            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
-                if (bindingElement.kind === 193 /* OmittedExpression */) {
-                    return;
-                }
-                ts.Debug.assert(bindingElement.kind === 169 /* BindingElement */);
-                if (bindingElement.propertyName) {
-                    writer.writeSymbol(ts.getTextOfNode(bindingElement.propertyName), bindingElement.symbol);
-                    writePunctuation(writer, 54 /* ColonToken */);
-                    writeSpace(writer);
-                }
-                if (ts.isBindingPattern(bindingElement.name)) {
-                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    if (bindingElement.dotDotDotToken) {
-                        writePunctuation(writer, 22 /* DotDotDotToken */);
-                    }
-                    appendSymbolNameOnly(bindingElement.symbol, writer);
-                }
-            }
-            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25 /* LessThanToken */);
-                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 27 /* GreaterThanToken */);
-                }
-            }
-            function buildDisplayForCommaSeparatedList(list, writer, action) {
-                for (var i = 0; i < list.length; i++) {
-                    if (i > 0) {
-                        writePunctuation(writer, 24 /* CommaToken */);
-                        writeSpace(writer);
-                    }
-                    action(list[i]);
-                }
-            }
-            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25 /* LessThanToken */);
-                    var flags_1 = 256 /* InFirstTypeArgument */;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (i > 0) {
-                            writePunctuation(writer, 24 /* CommaToken */);
-                            writeSpace(writer);
-                            flags_1 = 0 /* None */;
-                        }
-                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags_1);
-                    }
-                    writePunctuation(writer, 27 /* GreaterThanToken */);
-                }
-            }
-            function buildDisplayForParametersAndDelimiters(thisType, parameters, writer, enclosingDeclaration, flags, symbolStack) {
-                writePunctuation(writer, 17 /* OpenParenToken */);
-                if (thisType) {
-                    writeKeyword(writer, 97 /* ThisKeyword */);
-                    writePunctuation(writer, 54 /* ColonToken */);
-                    writeSpace(writer);
-                    buildTypeDisplay(thisType, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                for (var i = 0; i < parameters.length; i++) {
-                    if (i > 0 || thisType) {
-                        writePunctuation(writer, 24 /* CommaToken */);
-                        writeSpace(writer);
-                    }
-                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
-                }
-                writePunctuation(writer, 18 /* CloseParenToken */);
-            }
-            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    writer.writeParameter(predicate.parameterName);
-                }
-                else {
-                    writeKeyword(writer, 97 /* ThisKeyword */);
-                }
-                writeSpace(writer);
-                writeKeyword(writer, 124 /* IsKeyword */);
-                writeSpace(writer);
-                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
-            }
-            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
-                if (flags & 8 /* WriteArrowStyleSignature */) {
-                    writeSpace(writer);
-                    writePunctuation(writer, 34 /* EqualsGreaterThanToken */);
-                }
-                else {
-                    writePunctuation(writer, 54 /* ColonToken */);
-                }
-                writeSpace(writer);
-                if (signature.typePredicate) {
-                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    var returnType = getReturnTypeOfSignature(signature);
-                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
-                }
-            }
-            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
-                if (kind === 1 /* Construct */) {
-                    writeKeyword(writer, 92 /* NewKeyword */);
-                    writeSpace(writer);
-                }
-                if (signature.target && (flags & 32 /* WriteTypeArgumentsOfSignature */)) {
-                    // Instantiated signature, write type arguments instead
-                    // This is achieved by passing in the mapper separately
-                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
-                }
-                else {
-                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                buildDisplayForParametersAndDelimiters(signature.thisType, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
-                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
-            }
-            return _displayBuilder || (_displayBuilder = {
-                buildSymbolDisplay: buildSymbolDisplay,
-                buildTypeDisplay: buildTypeDisplay,
-                buildTypeParameterDisplay: buildTypeParameterDisplay,
-                buildTypePredicateDisplay: buildTypePredicateDisplay,
-                buildParameterDisplay: buildParameterDisplay,
-                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
-                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
-                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
-                buildSignatureDisplay: buildSignatureDisplay,
-                buildReturnTypeDisplay: buildReturnTypeDisplay
-            });
-        }
-        function isDeclarationVisible(node) {
-            if (node) {
-                var links = getNodeLinks(node);
-                if (links.isVisible === undefined) {
-                    links.isVisible = !!determineIfDeclarationIsVisible();
-                }
-                return links.isVisible;
-            }
-            return false;
-            function determineIfDeclarationIsVisible() {
-                switch (node.kind) {
-                    case 169 /* BindingElement */:
-                        return isDeclarationVisible(node.parent.parent);
-                    case 218 /* VariableDeclaration */:
-                        if (ts.isBindingPattern(node.name) &&
-                            !node.name.elements.length) {
-                            // If the binding pattern is empty, this variable declaration is not visible
-                            return false;
-                        }
-                    // Otherwise fall through
-                    case 225 /* ModuleDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                        // external module augmentation is always visible
-                        if (ts.isExternalModuleAugmentation(node)) {
-                            return true;
-                        }
-                        var parent_7 = getDeclarationContainer(node);
-                        // If the node is not exported or it is not ambient module element (except import declaration)
-                        if (!(ts.getCombinedNodeFlags(node) & 1 /* Export */) &&
-                            !(node.kind !== 229 /* ImportEqualsDeclaration */ && parent_7.kind !== 256 /* SourceFile */ && ts.isInAmbientContext(parent_7))) {
-                            return isGlobalSourceFile(parent_7);
-                        }
-                        // Exported members/ambient module elements (exception import declaration) are visible if parent is visible
-                        return isDeclarationVisible(parent_7);
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (node.flags & (8 /* Private */ | 16 /* Protected */)) {
-                            // Private/protected properties/methods are not visible
-                            return false;
-                        }
-                    // Public properties/methods are visible if its parents are visible, so const it fall into next case statement
-                    case 148 /* Constructor */:
-                    case 152 /* ConstructSignature */:
-                    case 151 /* CallSignature */:
-                    case 153 /* IndexSignature */:
-                    case 142 /* Parameter */:
-                    case 226 /* ModuleBlock */:
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 159 /* TypeLiteral */:
-                    case 155 /* TypeReference */:
-                    case 160 /* ArrayType */:
-                    case 161 /* TupleType */:
-                    case 162 /* UnionType */:
-                    case 163 /* IntersectionType */:
-                    case 164 /* ParenthesizedType */:
-                        return isDeclarationVisible(node.parent);
-                    // Default binding, import specifier and namespace import is visible
-                    // only on demand so by default it is not visible
-                    case 231 /* ImportClause */:
-                    case 232 /* NamespaceImport */:
-                    case 234 /* ImportSpecifier */:
-                        return false;
-                    // Type parameters are always visible
-                    case 141 /* TypeParameter */:
-                    // Source file is always visible
-                    case 256 /* SourceFile */:
-                        return true;
-                    // Export assignments do not create name bindings outside the module
-                    case 235 /* ExportAssignment */:
-                        return false;
-                    default:
-                        return false;
-                }
-            }
-        }
-        function collectLinkedAliases(node) {
-            var exportSymbol;
-            if (node.parent && node.parent.kind === 235 /* ExportAssignment */) {
-                exportSymbol = resolveName(node.parent, node.text, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */, ts.Diagnostics.Cannot_find_name_0, node);
-            }
-            else if (node.parent.kind === 238 /* ExportSpecifier */) {
-                var exportSpecifier = node.parent;
-                exportSymbol = exportSpecifier.parent.parent.moduleSpecifier ?
-                    getExternalModuleMember(exportSpecifier.parent.parent, exportSpecifier) :
-                    resolveEntityName(exportSpecifier.propertyName || exportSpecifier.name, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */);
-            }
-            var result = [];
-            if (exportSymbol) {
-                buildVisibleNodeList(exportSymbol.declarations);
-            }
-            return result;
-            function buildVisibleNodeList(declarations) {
-                ts.forEach(declarations, function (declaration) {
-                    getNodeLinks(declaration).isVisible = true;
-                    var resultNode = getAnyImportSyntax(declaration) || declaration;
-                    if (!ts.contains(result, resultNode)) {
-                        result.push(resultNode);
-                    }
-                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
-                        // Add the referenced top container visible
-                        var internalModuleReference = declaration.moduleReference;
-                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
-                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */, undefined, undefined);
-                        if (importSymbol) {
-                            buildVisibleNodeList(importSymbol.declarations);
-                        }
-                    }
-                });
-            }
-        }
-        /**
-         * Push an entry on the type resolution stack. If an entry with the given target and the given property name
-         * is already on the stack, and no entries in between already have a type, then a circularity has occurred.
-         * In this case, the result values of the existing entry and all entries pushed after it are changed to false,
-         * and the value false is returned. Otherwise, the new entry is just pushed onto the stack, and true is returned.
-         * In order to see if the same query has already been done before, the target object and the propertyName both
-         * must match the one passed in.
-         *
-         * @param target The symbol, type, or signature whose type is being queried
-         * @param propertyName The property name that should be used to query the target for its type
-         */
-        function pushTypeResolution(target, propertyName) {
-            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
-            if (resolutionCycleStartIndex >= 0) {
-                // A cycle was found
-                var length_2 = resolutionTargets.length;
-                for (var i = resolutionCycleStartIndex; i < length_2; i++) {
-                    resolutionResults[i] = false;
-                }
-                return false;
-            }
-            resolutionTargets.push(target);
-            resolutionResults.push(/*items*/ true);
-            resolutionPropertyNames.push(propertyName);
-            return true;
-        }
-        function findResolutionCycleStartIndex(target, propertyName) {
-            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
-                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
-                    return -1;
-                }
-                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
-                    return i;
-                }
-            }
-            return -1;
-        }
-        function hasType(target, propertyName) {
-            if (propertyName === 0 /* Type */) {
-                return getSymbolLinks(target).type;
-            }
-            if (propertyName === 2 /* DeclaredType */) {
-                return getSymbolLinks(target).declaredType;
-            }
-            if (propertyName === 1 /* ResolvedBaseConstructorType */) {
-                ts.Debug.assert(!!(target.flags & 1024 /* Class */));
-                return target.resolvedBaseConstructorType;
-            }
-            if (propertyName === 3 /* ResolvedReturnType */) {
-                return target.resolvedReturnType;
-            }
-            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
-        }
-        // Pop an entry from the type resolution stack and return its associated result value. The result value will
-        // be true if no circularities were detected, or false if a circularity was found.
-        function popTypeResolution() {
-            resolutionTargets.pop();
-            resolutionPropertyNames.pop();
-            return resolutionResults.pop();
-        }
-        function getDeclarationContainer(node) {
-            node = ts.getRootDeclaration(node);
-            while (node) {
-                switch (node.kind) {
-                    case 218 /* VariableDeclaration */:
-                    case 219 /* VariableDeclarationList */:
-                    case 234 /* ImportSpecifier */:
-                    case 233 /* NamedImports */:
-                    case 232 /* NamespaceImport */:
-                    case 231 /* ImportClause */:
-                        node = node.parent;
-                        break;
-                    default:
-                        return node.parent;
-                }
-            }
-        }
-        function getTypeOfPrototypeProperty(prototype) {
-            // TypeScript 1.0 spec (April 2014): 8.4
-            // Every class automatically contains a static property member named 'prototype',
-            // the type of which is an instantiation of the class type with type Any supplied as a type argument for each type parameter.
-            // It is an error to explicitly declare a static property member with the name 'prototype'.
-            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
-            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
-        }
-        // Return the type of the given property in the given type, or undefined if no such property exists
-        function getTypeOfPropertyOfType(type, name) {
-            var prop = getPropertyOfType(type, name);
-            return prop ? getTypeOfSymbol(prop) : undefined;
-        }
-        function isTypeAny(type) {
-            return type && (type.flags & 1 /* Any */) !== 0;
-        }
-        // Return the type of a binding element parent. We check SymbolLinks first to see if a type has been
-        // assigned by contextual typing.
-        function getTypeForBindingElementParent(node) {
-            var symbol = getSymbolOfNode(node);
-            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false);
-        }
-        function getTextOfPropertyName(name) {
-            switch (name.kind) {
-                case 69 /* Identifier */:
-                    return name.text;
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                    return name.text;
-                case 140 /* ComputedPropertyName */:
-                    if (ts.isStringOrNumericLiteral(name.expression.kind)) {
-                        return name.expression.text;
-                    }
-            }
-            return undefined;
-        }
-        function isComputedNonLiteralName(name) {
-            return name.kind === 140 /* ComputedPropertyName */ && !ts.isStringOrNumericLiteral(name.expression.kind);
-        }
-        /** Return the inferred type for a binding element */
-        function getTypeForBindingElement(declaration) {
-            var pattern = declaration.parent;
-            var parentType = getTypeForBindingElementParent(pattern.parent);
-            // If parent has the unknown (error) type, then so does this binding element
-            if (parentType === unknownType) {
-                return unknownType;
-            }
-            // If no type was specified or inferred for parent, or if the specified or inferred type is any,
-            // infer from the initializer of the binding element if one is present. Otherwise, go with the
-            // undefined or any type of the parent.
-            if (!parentType || isTypeAny(parentType)) {
-                if (declaration.initializer) {
-                    return checkExpressionCached(declaration.initializer);
-                }
-                return parentType;
-            }
-            var type;
-            if (pattern.kind === 167 /* ObjectBindingPattern */) {
-                // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form)
-                var name_10 = declaration.propertyName || declaration.name;
-                if (isComputedNonLiteralName(name_10)) {
-                    // computed properties with non-literal names are treated as 'any'
-                    return anyType;
-                }
-                if (declaration.initializer) {
-                    getContextualType(declaration.initializer);
-                }
-                // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature,
-                // or otherwise the type of the string index signature.
-                var text = getTextOfPropertyName(name_10);
-                type = getTypeOfPropertyOfType(parentType, text) ||
-                    isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1 /* Number */) ||
-                    getIndexTypeOfType(parentType, 0 /* String */);
-                if (!type) {
-                    error(name_10, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_10));
-                    return unknownType;
-                }
-            }
-            else {
-                // This elementType will be used if the specific property corresponding to this index is not
-                // present (aka the tuple element property). This call also checks that the parentType is in
-                // fact an iterable or array (depending on target language).
-                var elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false);
-                if (!declaration.dotDotDotToken) {
-                    // Use specific property type when parent is a tuple or numeric index type when parent is an array
-                    var propName = "" + ts.indexOf(pattern.elements, declaration);
-                    type = isTupleLikeType(parentType)
-                        ? getTypeOfPropertyOfType(parentType, propName)
-                        : elementType;
-                    if (!type) {
-                        if (isTupleType(parentType)) {
-                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), parentType.elementTypes.length, pattern.elements.length);
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
-                        }
-                        return unknownType;
-                    }
-                }
-                else {
-                    // Rest element has an array type with the same element type as the parent type
-                    type = createArrayType(elementType);
-                }
-            }
-            // In strict null checking mode, if a default value of a non-undefined type is specified, remove
-            // undefined from the final type.
-            if (strictNullChecks && declaration.initializer && !(getNullableKind(checkExpressionCached(declaration.initializer)) & 32 /* Undefined */)) {
-                type = getTypeWithFacts(type, 131072 /* NEUndefined */);
-            }
-            return type;
-        }
-        function getTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            var jsDocType = getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-            if (jsDocType) {
-                return getTypeFromTypeNode(jsDocType);
-            }
-        }
-        function getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            // First, see if this node has an @type annotation on it directly.
-            var typeTag = ts.getJSDocTypeTag(declaration);
-            if (typeTag && typeTag.typeExpression) {
-                return typeTag.typeExpression.type;
-            }
-            if (declaration.kind === 218 /* VariableDeclaration */ &&
-                declaration.parent.kind === 219 /* VariableDeclarationList */ &&
-                declaration.parent.parent.kind === 200 /* VariableStatement */) {
-                // @type annotation might have been on the variable statement, try that instead.
-                var annotation = ts.getJSDocTypeTag(declaration.parent.parent);
-                if (annotation && annotation.typeExpression) {
-                    return annotation.typeExpression.type;
-                }
-            }
-            else if (declaration.kind === 142 /* Parameter */) {
-                // If it's a parameter, see if the parent has a jsdoc comment with an @param
-                // annotation.
-                var paramTag = ts.getCorrespondingJSDocParameterTag(declaration);
-                if (paramTag && paramTag.typeExpression) {
-                    return paramTag.typeExpression.type;
-                }
-            }
-            return undefined;
-        }
-        function addOptionality(type, optional) {
-            return strictNullChecks && optional ? addNullableKind(type, 32 /* Undefined */) : type;
-        }
-        // Return the inferred type for a variable, parameter, or property declaration
-        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
-            if (declaration.flags & 134217728 /* JavaScriptFile */) {
-                // If this is a variable in a JavaScript file, then use the JSDoc type (if it has
-                // one as its type), otherwise fallback to the below standard TS codepaths to
-                // try to figure it out.
-                var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            // A variable declared in a for..in statement is always of type string
-            if (declaration.parent.parent.kind === 207 /* ForInStatement */) {
-                return stringType;
-            }
-            if (declaration.parent.parent.kind === 208 /* ForOfStatement */) {
-                // checkRightHandSideOfForOf will return undefined if the for-of expression type was
-                // missing properties/signatures required to get its iteratedType (like
-                // [Symbol.iterator] or next). This may be because we accessed properties from anyType,
-                // or it may have led to an error inside getElementTypeOfIterable.
-                return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType;
-            }
-            if (ts.isBindingPattern(declaration.parent)) {
-                return getTypeForBindingElement(declaration);
-            }
-            // Use type from type annotation if one is present
-            if (declaration.type) {
-                return addOptionality(getTypeFromTypeNode(declaration.type), /*optional*/ declaration.questionToken && includeOptionality);
-            }
-            if (declaration.kind === 142 /* Parameter */) {
-                var func = declaration.parent;
-                // For a parameter of a set accessor, use the type of the get accessor if one is present
-                if (func.kind === 150 /* SetAccessor */ && !ts.hasDynamicName(func)) {
-                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149 /* GetAccessor */);
-                    if (getter) {
-                        var signature = getSignatureFromDeclaration(getter);
-                        var thisParameter = getAccessorThisParameter(func);
-                        if (thisParameter && declaration === thisParameter) {
-                            return signature.thisType;
-                        }
-                        return getReturnTypeOfSignature(signature);
-                    }
-                }
-                // Use contextual parameter type if one is available
-                var type = declaration.symbol.name === "this"
-                    ? getContextuallyTypedThisType(func)
-                    : getContextuallyTypedParameterType(declaration);
-                if (type) {
-                    return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
-                }
-            }
-            // Use the type of the initializer expression if one is present
-            if (declaration.initializer) {
-                return addOptionality(checkExpressionCached(declaration.initializer), /*optional*/ declaration.questionToken && includeOptionality);
-            }
-            // If it is a short-hand property assignment, use the type of the identifier
-            if (declaration.kind === 254 /* ShorthandPropertyAssignment */) {
-                return checkIdentifier(declaration.name);
-            }
-            // If the declaration specifies a binding pattern, use the type implied by the binding pattern
-            if (ts.isBindingPattern(declaration.name)) {
-                return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ false);
-            }
-            // No type specified and nothing can be inferred
-            return undefined;
-        }
-        // Return the type implied by a binding pattern element. This is the type of the initializer of the element if
-        // one is present. Otherwise, if the element is itself a binding pattern, it is the type implied by the binding
-        // pattern. Otherwise, it is the type any.
-        function getTypeFromBindingElement(element, includePatternInType) {
-            if (element.initializer) {
-                var type = checkExpressionCached(element.initializer);
-                reportErrorsFromWidening(element, type);
-                return getWidenedType(type);
-            }
-            if (ts.isBindingPattern(element.name)) {
-                return getTypeFromBindingPattern(element.name, includePatternInType);
-            }
-            if (compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
-                reportImplicitAnyError(element, anyType);
-            }
-            return anyType;
-        }
-        // Return the type implied by an object binding pattern
-        function getTypeFromObjectBindingPattern(pattern, includePatternInType) {
-            var members = {};
-            var hasComputedProperties = false;
-            ts.forEach(pattern.elements, function (e) {
-                var name = e.propertyName || e.name;
-                if (isComputedNonLiteralName(name)) {
-                    // do not include computed properties in the implied type
-                    hasComputedProperties = true;
-                    return;
-                }
-                var text = getTextOfPropertyName(name);
-                var flags = 4 /* Property */ | 67108864 /* Transient */ | (e.initializer ? 536870912 /* Optional */ : 0);
-                var symbol = createSymbol(flags, text);
-                symbol.type = getTypeFromBindingElement(e, includePatternInType);
-                symbol.bindingElement = e;
-                members[symbol.name] = symbol;
-            });
-            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined);
-            if (includePatternInType) {
-                result.pattern = pattern;
-            }
-            if (hasComputedProperties) {
-                result.flags |= 67108864 /* ObjectLiteralPatternWithComputedProperties */;
-            }
-            return result;
-        }
-        // Return the type implied by an array binding pattern
-        function getTypeFromArrayBindingPattern(pattern, includePatternInType) {
-            var elements = pattern.elements;
-            if (elements.length === 0 || elements[elements.length - 1].dotDotDotToken) {
-                return languageVersion >= 2 /* ES6 */ ? createIterableType(anyType) : anyArrayType;
-            }
-            // If the pattern has at least one element, and no rest element, then it should imply a tuple type.
-            var elementTypes = ts.map(elements, function (e) { return e.kind === 193 /* OmittedExpression */ ? anyType : getTypeFromBindingElement(e, includePatternInType); });
-            if (includePatternInType) {
-                var result = createNewTupleType(elementTypes);
-                result.pattern = pattern;
-                return result;
-            }
-            return createTupleType(elementTypes);
-        }
-        // Return the type implied by a binding pattern. This is the type implied purely by the binding pattern itself
-        // and without regard to its context (i.e. without regard any type annotation or initializer associated with the
-        // declaration in which the binding pattern is contained). For example, the implied type of [x, y] is [any, any]
-        // and the implied type of { x, y: z = 1 } is { x: any; y: number; }. The type implied by a binding pattern is
-        // used as the contextual type of an initializer associated with the binding pattern. Also, for a destructuring
-        // parameter with no type annotation or initializer, the type implied by the binding pattern becomes the type of
-        // the parameter.
-        function getTypeFromBindingPattern(pattern, includePatternInType) {
-            return pattern.kind === 167 /* ObjectBindingPattern */
-                ? getTypeFromObjectBindingPattern(pattern, includePatternInType)
-                : getTypeFromArrayBindingPattern(pattern, includePatternInType);
-        }
-        // Return the type associated with a variable, parameter, or property declaration. In the simple case this is the type
-        // specified in a type annotation or inferred from an initializer. However, in the case of a destructuring declaration it
-        // is a bit more involved. For example:
-        //
-        //   var [x, s = ""] = [1, "one"];
-        //
-        // Here, the array literal [1, "one"] is contextually typed by the type [any, string], which is the implied type of the
-        // binding pattern [x, s = ""]. Because the contextual type is a tuple type, the resulting type of [1, "one"] is the
-        // tuple type [number, string]. Thus, the type inferred for 'x' is number and the type inferred for 's' is string.
-        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
-            var type = getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
-            if (type) {
-                if (reportErrors) {
-                    reportErrorsFromWidening(declaration, type);
-                }
-                // During a normal type check we'll never get to here with a property assignment (the check of the containing
-                // object literal uses a different path). We exclude widening only so that language services and type verification
-                // tools see the actual type.
-                if (declaration.kind === 253 /* PropertyAssignment */) {
-                    return type;
-                }
-                return getWidenedType(type);
-            }
-            // Rest parameters default to type any[], other parameters default to type any
-            type = declaration.dotDotDotToken ? anyArrayType : anyType;
-            // Report implicit any errors unless this is a private property within an ambient declaration
-            if (reportErrors && compilerOptions.noImplicitAny) {
-                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
-                    reportImplicitAnyError(declaration, type);
-                }
-            }
-            return type;
-        }
-        function declarationBelongsToPrivateAmbientMember(declaration) {
-            var root = ts.getRootDeclaration(declaration);
-            var memberDeclaration = root.kind === 142 /* Parameter */ ? root.parent : root;
-            return isPrivateWithinAmbient(memberDeclaration);
-        }
-        function getTypeOfVariableOrParameterOrProperty(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                // Handle prototype property
-                if (symbol.flags & 134217728 /* Prototype */) {
-                    return links.type = getTypeOfPrototypeProperty(symbol);
-                }
-                // Handle catch clause variables
-                var declaration = symbol.valueDeclaration;
-                if (declaration.parent.kind === 252 /* CatchClause */) {
-                    return links.type = anyType;
-                }
-                // Handle export default expressions
-                if (declaration.kind === 235 /* ExportAssignment */) {
-                    return links.type = checkExpression(declaration.expression);
-                }
-                // Handle module.exports = expr
-                if (declaration.kind === 187 /* BinaryExpression */) {
-                    return links.type = getUnionType(ts.map(symbol.declarations, function (decl) { return checkExpressionCached(decl.right); }));
-                }
-                if (declaration.kind === 172 /* PropertyAccessExpression */) {
-                    // Declarations only exist for property access expressions for certain
-                    // special assignment kinds
-                    if (declaration.parent.kind === 187 /* BinaryExpression */) {
-                        // Handle exports.p = expr or this.p = expr or className.prototype.method = expr
-                        return links.type = checkExpressionCached(declaration.parent.right);
-                    }
-                }
-                // Handle variable, parameter or property
-                if (!pushTypeResolution(symbol, 0 /* Type */)) {
-                    return unknownType;
-                }
-                var type = getWidenedTypeForVariableLikeDeclaration(declaration, /*reportErrors*/ true);
-                if (!popTypeResolution()) {
-                    if (symbol.valueDeclaration.type) {
-                        // Variable has type annotation that circularly references the variable itself
-                        type = unknownType;
-                        error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
-                    }
-                    else {
-                        // Variable has initializer that circularly references the variable itself
-                        type = anyType;
-                        if (compilerOptions.noImplicitAny) {
-                            error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
-                        }
-                    }
-                }
-                links.type = type;
-            }
-            return links.type;
-        }
-        function getAnnotatedAccessorType(accessor) {
-            if (accessor) {
-                if (accessor.kind === 149 /* GetAccessor */) {
-                    return accessor.type && getTypeFromTypeNode(accessor.type);
-                }
-                else {
-                    var setterTypeAnnotation = ts.getSetAccessorTypeAnnotationNode(accessor);
-                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
-                }
-            }
-            return undefined;
-        }
-        function getAnnotatedAccessorThisType(accessor) {
-            if (accessor) {
-                var parameter = getAccessorThisParameter(accessor);
-                if (parameter && parameter.type) {
-                    return getTypeFromTypeNode(accessor.parameters[0].type);
-                }
-            }
-            return undefined;
-        }
-        function getTypeOfAccessors(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var getter = ts.getDeclarationOfKind(symbol, 149 /* GetAccessor */);
-                var setter = ts.getDeclarationOfKind(symbol, 150 /* SetAccessor */);
-                if (getter && getter.flags & 134217728 /* JavaScriptFile */) {
-                    var jsDocType = getTypeForVariableLikeDeclarationFromJSDocComment(getter);
-                    if (jsDocType) {
-                        return links.type = jsDocType;
-                    }
-                }
-                if (!pushTypeResolution(symbol, 0 /* Type */)) {
-                    return unknownType;
-                }
-                var type = void 0;
-                // First try to see if the user specified a return type on the get-accessor.
-                var getterReturnType = getAnnotatedAccessorType(getter);
-                if (getterReturnType) {
-                    type = getterReturnType;
-                }
-                else {
-                    // If the user didn't specify a return type, try to use the set-accessor's parameter type.
-                    var setterParameterType = getAnnotatedAccessorType(setter);
-                    if (setterParameterType) {
-                        type = setterParameterType;
-                    }
-                    else {
-                        // If there are no specified types, try to infer it from the body of the get accessor if it exists.
-                        if (getter && getter.body) {
-                            type = getReturnTypeFromBody(getter);
-                        }
-                        else {
-                            if (compilerOptions.noImplicitAny) {
-                                error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation, symbolToString(symbol));
-                            }
-                            type = anyType;
-                        }
-                    }
-                }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var getter_1 = ts.getDeclarationOfKind(symbol, 149 /* GetAccessor */);
-                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
-                    }
-                }
-                links.type = type;
-            }
-            return links.type;
-        }
-        function getTypeOfFuncClassEnumModule(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var type = createObjectType(65536 /* Anonymous */, symbol);
-                links.type = strictNullChecks && symbol.flags & 536870912 /* Optional */ ?
-                    addNullableKind(type, 32 /* Undefined */) : type;
-            }
-            return links.type;
-        }
-        function getTypeOfEnumMember(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
-            }
-            return links.type;
-        }
-        function getTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var targetSymbol = resolveAlias(symbol);
-                // It only makes sense to get the type of a value symbol. If the result of resolving
-                // the alias is not a value, then it has no type. To get the type associated with a
-                // type symbol, call getDeclaredTypeOfSymbol.
-                // This check is important because without it, a call to getTypeOfSymbol could end
-                // up recursively calling getTypeOfAlias, causing a stack overflow.
-                links.type = targetSymbol.flags & 107455 /* Value */
-                    ? getTypeOfSymbol(targetSymbol)
-                    : unknownType;
-            }
-            return links.type;
-        }
-        function getTypeOfInstantiatedSymbol(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
-            }
-            return links.type;
-        }
-        function getTypeOfSymbol(symbol) {
-            if (symbol.flags & 16777216 /* Instantiated */) {
-                return getTypeOfInstantiatedSymbol(symbol);
-            }
-            if (symbol.flags & (3 /* Variable */ | 4 /* Property */)) {
-                return getTypeOfVariableOrParameterOrProperty(symbol);
-            }
-            if (symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
-                return getTypeOfFuncClassEnumModule(symbol);
-            }
-            if (symbol.flags & 8 /* EnumMember */) {
-                return getTypeOfEnumMember(symbol);
-            }
-            if (symbol.flags & 98304 /* Accessor */) {
-                return getTypeOfAccessors(symbol);
-            }
-            if (symbol.flags & 8388608 /* Alias */) {
-                return getTypeOfAlias(symbol);
-            }
-            return unknownType;
-        }
-        function getTargetType(type) {
-            return type.flags & 4096 /* Reference */ ? type.target : type;
-        }
-        function hasBaseType(type, checkBase) {
-            return check(type);
-            function check(type) {
-                var target = getTargetType(type);
-                return target === checkBase || ts.forEach(getBaseTypes(target), check);
-            }
-        }
-        // Appends the type parameters given by a list of declarations to a set of type parameters and returns the resulting set.
-        // The function allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set
-        // in-place and returns the same array.
-        function appendTypeParameters(typeParameters, declarations) {
-            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
-                var declaration = declarations_2[_i];
-                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
-                if (!typeParameters) {
-                    typeParameters = [tp];
-                }
-                else if (!ts.contains(typeParameters, tp)) {
-                    typeParameters.push(tp);
-                }
-            }
-            return typeParameters;
-        }
-        // Appends the outer type parameters of a node to a set of type parameters and returns the resulting set. The function
-        // allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set in-place and
-        // returns the same array.
-        function appendOuterTypeParameters(typeParameters, node) {
-            while (true) {
-                node = node.parent;
-                if (!node) {
-                    return typeParameters;
-                }
-                if (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */ ||
-                    node.kind === 220 /* FunctionDeclaration */ || node.kind === 179 /* FunctionExpression */ ||
-                    node.kind === 147 /* MethodDeclaration */ || node.kind === 180 /* ArrowFunction */) {
-                    var declarations = node.typeParameters;
-                    if (declarations) {
-                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
-                    }
-                }
-            }
-        }
-        // The outer type parameters are those defined by enclosing generic classes, methods, or functions.
-        function getOuterTypeParametersOfClassOrInterface(symbol) {
-            var declaration = symbol.flags & 32 /* Class */ ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */);
-            return appendOuterTypeParameters(undefined, declaration);
-        }
-        // The local type parameters are the combined set of type parameters from all declarations of the class,
-        // interface, or type alias.
-        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
-            var result;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var node = _a[_i];
-                if (node.kind === 222 /* InterfaceDeclaration */ || node.kind === 221 /* ClassDeclaration */ ||
-                    node.kind === 192 /* ClassExpression */ || node.kind === 223 /* TypeAliasDeclaration */) {
-                    var declaration = node;
-                    if (declaration.typeParameters) {
-                        result = appendTypeParameters(result, declaration.typeParameters);
-                    }
-                }
-            }
-            return result;
-        }
-        // The full set of type parameters for a generic class or interface type consists of its outer type parameters plus
-        // its locally declared type parameters.
-        function getTypeParametersOfClassOrInterface(symbol) {
-            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
-        }
-        function isConstructorType(type) {
-            return type.flags & 80896 /* ObjectType */ && getSignaturesOfType(type, 1 /* Construct */).length > 0;
-        }
-        function getBaseTypeNodeOfClass(type) {
-            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
-        }
-        function getConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var typeArgCount = typeArgumentNodes ? typeArgumentNodes.length : 0;
-            return ts.filter(getSignaturesOfType(type, 1 /* Construct */), function (sig) { return (sig.typeParameters ? sig.typeParameters.length : 0) === typeArgCount; });
-        }
-        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes);
-            if (typeArgumentNodes) {
-                var typeArguments_1 = ts.map(typeArgumentNodes, getTypeFromTypeNode);
-                signatures = ts.map(signatures, function (sig) { return getSignatureInstantiation(sig, typeArguments_1); });
-            }
-            return signatures;
-        }
-        // The base constructor of a class can resolve to
-        // undefinedType if the class has no extends clause,
-        // unknownType if an error occurred during resolution of the extends expression,
-        // nullType if the extends expression is the null value, or
-        // an object type with at least one construct signature.
-        function getBaseConstructorTypeOfClass(type) {
-            if (!type.resolvedBaseConstructorType) {
-                var baseTypeNode = getBaseTypeNodeOfClass(type);
-                if (!baseTypeNode) {
-                    return type.resolvedBaseConstructorType = undefinedType;
-                }
-                if (!pushTypeResolution(type, 1 /* ResolvedBaseConstructorType */)) {
-                    return unknownType;
-                }
-                var baseConstructorType = checkExpression(baseTypeNode.expression);
-                if (baseConstructorType.flags & 80896 /* ObjectType */) {
-                    // Resolving the members of a class requires us to resolve the base class of that class.
-                    // We force resolution here such that we catch circularities now.
-                    resolveStructuredTypeMembers(baseConstructorType);
-                }
-                if (!popTypeResolution()) {
-                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
-                    return type.resolvedBaseConstructorType = unknownType;
-                }
-                if (baseConstructorType !== unknownType && baseConstructorType !== nullType && !isConstructorType(baseConstructorType)) {
-                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
-                    return type.resolvedBaseConstructorType = unknownType;
-                }
-                type.resolvedBaseConstructorType = baseConstructorType;
-            }
-            return type.resolvedBaseConstructorType;
-        }
-        function getBaseTypes(type) {
-            var isClass = type.symbol.flags & 32 /* Class */;
-            var isInterface = type.symbol.flags & 64 /* Interface */;
-            if (!type.resolvedBaseTypes) {
-                if (!isClass && !isInterface) {
-                    ts.Debug.fail("type must be class or interface");
-                }
-                if (isClass) {
-                    resolveBaseTypesOfClass(type);
-                }
-                if (isInterface) {
-                    resolveBaseTypesOfInterface(type);
-                }
-            }
-            return type.resolvedBaseTypes;
-        }
-        function resolveBaseTypesOfClass(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            var baseConstructorType = getBaseConstructorTypeOfClass(type);
-            if (!(baseConstructorType.flags & 80896 /* ObjectType */)) {
-                return;
-            }
-            var baseTypeNode = getBaseTypeNodeOfClass(type);
-            var baseType;
-            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
-            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 /* Class */ &&
-                areAllOuterTypeParametersApplied(originalBaseType)) {
-                // When base constructor type is a class with no captured type arguments we know that the constructors all have the same type parameters as the
-                // class and all return the instance type of the class. There is no need for further checks and we can apply the
-                // type arguments in the same manner as a type reference to get the same error reporting experience.
-                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol);
-            }
-            else {
-                // The class derives from a "class-like" constructor function, check that we have at least one construct signature
-                // with a matching number of type parameters and use the return type of the first instantiated signature. Elsewhere
-                // we check that all instantiated signatures return the same type.
-                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments);
-                if (!constructors.length) {
-                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
-                    return;
-                }
-                baseType = getReturnTypeOfSignature(constructors[0]);
-            }
-            if (baseType === unknownType) {
-                return;
-            }
-            if (!(getTargetType(baseType).flags & (1024 /* Class */ | 2048 /* Interface */))) {
-                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
-                return;
-            }
-            if (type === baseType || hasBaseType(baseType, type)) {
-                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
-                return;
-            }
-            if (type.resolvedBaseTypes === emptyArray) {
-                type.resolvedBaseTypes = [baseType];
-            }
-            else {
-                type.resolvedBaseTypes.push(baseType);
-            }
-        }
-        function areAllOuterTypeParametersApplied(type) {
-            // An unapplied type parameter has its symbol still the same as the matching argument symbol.
-            // Since parameters are applied outer-to-inner, only the last outer parameter needs to be checked.
-            var outerTypeParameters = type.outerTypeParameters;
-            if (outerTypeParameters) {
-                var last = outerTypeParameters.length - 1;
-                var typeArguments = type.typeArguments;
-                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
-            }
-            return true;
-        }
-        function resolveBaseTypesOfInterface(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222 /* InterfaceDeclaration */ && ts.getInterfaceBaseTypeNodes(declaration)) {
-                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
-                        var node = _c[_b];
-                        var baseType = getTypeFromTypeNode(node);
-                        if (baseType !== unknownType) {
-                            if (getTargetType(baseType).flags & (1024 /* Class */ | 2048 /* Interface */)) {
-                                if (type !== baseType && !hasBaseType(baseType, type)) {
-                                    if (type.resolvedBaseTypes === emptyArray) {
-                                        type.resolvedBaseTypes = [baseType];
-                                    }
-                                    else {
-                                        type.resolvedBaseTypes.push(baseType);
-                                    }
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
-                                }
-                            }
-                            else {
-                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        // Returns true if the interface given by the symbol is free of "this" references. Specifically, the result is
-        // true if the interface itself contains no references to "this" in its body, if all base types are interfaces,
-        // and if none of the base interfaces have a "this" type.
-        function isIndependentInterface(symbol) {
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222 /* InterfaceDeclaration */) {
-                    if (declaration.flags & 16384 /* ContainsThis */) {
-                        return false;
-                    }
-                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
-                    if (baseTypeNodes) {
-                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
-                            var node = baseTypeNodes_1[_b];
-                            if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                                var baseSymbol = resolveEntityName(node.expression, 793056 /* Type */, /*ignoreErrors*/ true);
-                                if (!baseSymbol || !(baseSymbol.flags & 64 /* Interface */) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
-                                    return false;
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            return true;
-        }
-        function getDeclaredTypeOfClassOrInterface(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var kind = symbol.flags & 32 /* Class */ ? 1024 /* Class */ : 2048 /* Interface */;
-                var type = links.declaredType = createObjectType(kind, symbol);
-                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
-                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                // A class or interface is generic if it has type parameters or a "this" type. We always give classes a "this" type
-                // because it is not feasible to analyze all members to determine if the "this" type escapes the class (in particular,
-                // property types inferred from initializers and method return types inferred from return statements are very hard
-                // to exhaustively analyze). We give interfaces a "this" type if we can't definitely determine that they are free of
-                // "this" references.
-                if (outerTypeParameters || localTypeParameters || kind === 1024 /* Class */ || !isIndependentInterface(symbol)) {
-                    type.flags |= 4096 /* Reference */;
-                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
-                    type.outerTypeParameters = outerTypeParameters;
-                    type.localTypeParameters = localTypeParameters;
-                    type.instantiations = {};
-                    type.instantiations[getTypeListId(type.typeParameters)] = type;
-                    type.target = type;
-                    type.typeArguments = type.typeParameters;
-                    type.thisType = createType(512 /* TypeParameter */ | 33554432 /* ThisType */);
-                    type.thisType.symbol = symbol;
-                    type.thisType.constraint = type;
-                }
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfTypeAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                // Note that we use the links object as the target here because the symbol object is used as the unique
-                // identity for resolution of the 'type' property in SymbolLinks.
-                if (!pushTypeResolution(symbol, 2 /* DeclaredType */)) {
-                    return unknownType;
-                }
-                var declaration = ts.getDeclarationOfKind(symbol, 223 /* TypeAliasDeclaration */);
-                var type = getTypeFromTypeNode(declaration.type);
-                if (popTypeResolution()) {
-                    links.typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                    if (links.typeParameters) {
-                        // Initialize the instantiation cache for generic type aliases. The declared type corresponds to
-                        // an instantiation of the type alias with the type parameters supplied as type arguments.
-                        links.instantiations = {};
-                        links.instantiations[getTypeListId(links.typeParameters)] = type;
-                    }
-                }
-                else {
-                    type = unknownType;
-                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
-                }
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfEnum(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var type = createType(128 /* Enum */);
-                type.symbol = symbol;
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfTypeParameter(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var type = createType(512 /* TypeParameter */);
-                type.symbol = symbol;
-                if (!ts.getDeclarationOfKind(symbol, 141 /* TypeParameter */).constraint) {
-                    type.constraint = noConstraintType;
-                }
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfSymbol(symbol) {
-            ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0);
-            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
-                return getDeclaredTypeOfClassOrInterface(symbol);
-            }
-            if (symbol.flags & 524288 /* TypeAlias */) {
-                return getDeclaredTypeOfTypeAlias(symbol);
-            }
-            if (symbol.flags & 384 /* Enum */) {
-                return getDeclaredTypeOfEnum(symbol);
-            }
-            if (symbol.flags & 262144 /* TypeParameter */) {
-                return getDeclaredTypeOfTypeParameter(symbol);
-            }
-            if (symbol.flags & 8388608 /* Alias */) {
-                return getDeclaredTypeOfAlias(symbol);
-            }
-            return unknownType;
-        }
-        // A type reference is considered independent if each type argument is considered independent.
-        function isIndependentTypeReference(node) {
-            if (node.typeArguments) {
-                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
-                    var typeNode = _a[_i];
-                    if (!isIndependentType(typeNode)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        // A type is considered independent if it the any, string, number, boolean, symbol, or void keyword, a string
-        // literal type, an array with an element type that is considered independent, or a type reference that is
-        // considered independent.
-        function isIndependentType(node) {
-            switch (node.kind) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 103 /* VoidKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 93 /* NullKeyword */:
-                case 127 /* NeverKeyword */:
-                case 166 /* StringLiteralType */:
-                    return true;
-                case 160 /* ArrayType */:
-                    return isIndependentType(node.elementType);
-                case 155 /* TypeReference */:
-                    return isIndependentTypeReference(node);
-            }
-            return false;
-        }
-        // A variable-like declaration is considered independent (free of this references) if it has a type annotation
-        // that specifies an independent type, or if it has no type annotation and no initializer (and thus of type any).
-        function isIndependentVariableLikeDeclaration(node) {
-            return node.type && isIndependentType(node.type) || !node.type && !node.initializer;
-        }
-        // A function-like declaration is considered independent (free of this references) if it has a return type
-        // annotation that is considered independent and if each parameter is considered independent.
-        function isIndependentFunctionLikeDeclaration(node) {
-            if (node.kind !== 148 /* Constructor */ && (!node.type || !isIndependentType(node.type))) {
-                return false;
-            }
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                if (!isIndependentVariableLikeDeclaration(parameter)) {
-                    return false;
-                }
-            }
-            return true;
-        }
-        // Returns true if the class or interface member given by the symbol is free of "this" references. The
-        // function may return false for symbols that are actually free of "this" references because it is not
-        // feasible to perform a complete analysis in all cases. In particular, property members with types
-        // inferred from their initializers and function members with inferred return types are conservatively
-        // assumed not to be free of "this" references.
-        function isIndependentMember(symbol) {
-            if (symbol.declarations && symbol.declarations.length === 1) {
-                var declaration = symbol.declarations[0];
-                if (declaration) {
-                    switch (declaration.kind) {
-                        case 145 /* PropertyDeclaration */:
-                        case 144 /* PropertySignature */:
-                            return isIndependentVariableLikeDeclaration(declaration);
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 148 /* Constructor */:
-                            return isIndependentFunctionLikeDeclaration(declaration);
-                    }
-                }
-            }
-            return false;
-        }
-        function createSymbolTable(symbols) {
-            var result = {};
-            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
-                var symbol = symbols_1[_i];
-                result[symbol.name] = symbol;
-            }
-            return result;
-        }
-        // The mappingThisOnly flag indicates that the only type parameter being mapped is "this". When the flag is true,
-        // we check symbols to see if we can quickly conclude they are free of "this" references, thus needing no instantiation.
-        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
-            var result = {};
-            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
-                var symbol = symbols_2[_i];
-                result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper);
-            }
-            return result;
-        }
-        function addInheritedMembers(symbols, baseSymbols) {
-            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
-                var s = baseSymbols_1[_i];
-                if (!ts.hasProperty(symbols, s.name)) {
-                    symbols[s.name] = s;
-                }
-            }
-        }
-        function resolveDeclaredMembers(type) {
-            if (!type.declaredProperties) {
-                var symbol = type.symbol;
-                type.declaredProperties = getNamedMembers(symbol.members);
-                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members["__call"]);
-                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members["__new"]);
-                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
-                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
-            }
-            return type;
-        }
-        function getTypeWithThisArgument(type, thisArgument) {
-            if (type.flags & 4096 /* Reference */) {
-                return createTypeReference(type.target, ts.concatenate(type.typeArguments, [thisArgument || type.target.thisType]));
-            }
-            return type;
-        }
-        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
-            var mapper = identityMapper;
-            var members = source.symbol.members;
-            var callSignatures = source.declaredCallSignatures;
-            var constructSignatures = source.declaredConstructSignatures;
-            var stringIndexInfo = source.declaredStringIndexInfo;
-            var numberIndexInfo = source.declaredNumberIndexInfo;
-            if (!ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
-                mapper = createTypeMapper(typeParameters, typeArguments);
-                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, /*mappingThisOnly*/ typeParameters.length === 1);
-                callSignatures = instantiateList(source.declaredCallSignatures, mapper, instantiateSignature);
-                constructSignatures = instantiateList(source.declaredConstructSignatures, mapper, instantiateSignature);
-                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
-                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
-            }
-            var baseTypes = getBaseTypes(source);
-            if (baseTypes.length) {
-                if (members === source.symbol.members) {
-                    members = createSymbolTable(source.declaredProperties);
-                }
-                var thisArgument = ts.lastOrUndefined(typeArguments);
-                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
-                    var baseType = baseTypes_1[_i];
-                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
-                    addInheritedMembers(members, getPropertiesOfObjectType(instantiatedBaseType));
-                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0 /* Call */));
-                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1 /* Construct */));
-                    stringIndexInfo = stringIndexInfo || getIndexInfoOfType(instantiatedBaseType, 0 /* String */);
-                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1 /* Number */);
-                }
-            }
-            setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function resolveClassOrInterfaceMembers(type) {
-            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
-        }
-        function resolveTypeReferenceMembers(type) {
-            var source = resolveDeclaredMembers(type.target);
-            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
-            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
-                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
-            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
-        }
-        function createSignature(declaration, typeParameters, thisType, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasStringLiterals) {
-            var sig = new Signature(checker);
-            sig.declaration = declaration;
-            sig.typeParameters = typeParameters;
-            sig.parameters = parameters;
-            sig.thisType = thisType;
-            sig.resolvedReturnType = resolvedReturnType;
-            sig.typePredicate = typePredicate;
-            sig.minArgumentCount = minArgumentCount;
-            sig.hasRestParameter = hasRestParameter;
-            sig.hasStringLiterals = hasStringLiterals;
-            return sig;
-        }
-        function cloneSignature(sig) {
-            return createSignature(sig.declaration, sig.typeParameters, sig.thisType, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasStringLiterals);
-        }
-        function getDefaultConstructSignatures(classType) {
-            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-            var baseSignatures = getSignaturesOfType(baseConstructorType, 1 /* Construct */);
-            if (baseSignatures.length === 0) {
-                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasStringLiterals*/ false)];
-            }
-            var baseTypeNode = getBaseTypeNodeOfClass(classType);
-            var typeArguments = ts.map(baseTypeNode.typeArguments, getTypeFromTypeNode);
-            var typeArgCount = typeArguments ? typeArguments.length : 0;
-            var result = [];
-            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
-                var baseSig = baseSignatures_1[_i];
-                var typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
-                if (typeParamCount === typeArgCount) {
-                    var sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
-                    sig.typeParameters = classType.localTypeParameters;
-                    sig.resolvedReturnType = classType;
-                    result.push(sig);
-                }
-            }
-            return result;
-        }
-        function createTupleTypeMemberSymbols(memberTypes) {
-            var members = {};
-            for (var i = 0; i < memberTypes.length; i++) {
-                var symbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "" + i);
-                symbol.type = memberTypes[i];
-                members[i] = symbol;
-            }
-            return members;
-        }
-        function resolveTupleTypeMembers(type) {
-            var arrayElementType = getUnionType(type.elementTypes, /*noSubtypeReduction*/ true);
-            // Make the tuple type itself the 'this' type by including an extra type argument
-            var arrayType = resolveStructuredTypeMembers(createTypeFromGenericGlobalType(globalArrayType, [arrayElementType, type]));
-            var members = createTupleTypeMemberSymbols(type.elementTypes);
-            addInheritedMembers(members, arrayType.properties);
-            setObjectTypeMembers(type, members, arrayType.callSignatures, arrayType.constructSignatures, arrayType.stringIndexInfo, arrayType.numberIndexInfo);
-        }
-        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
-            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
-                var s = signatureList_1[_i];
-                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
-                    return s;
-                }
-            }
-        }
-        function findMatchingSignatures(signatureLists, signature, listIndex) {
-            if (signature.typeParameters) {
-                // We require an exact match for generic signatures, so we only return signatures from the first
-                // signature list and only if they have exact matches in the other signature lists.
-                if (listIndex > 0) {
-                    return undefined;
-                }
-                for (var i = 1; i < signatureLists.length; i++) {
-                    if (!findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false)) {
-                        return undefined;
-                    }
-                }
-                return [signature];
-            }
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                // Allow matching non-generic signatures to have excess parameters and different return types
-                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ true, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true);
-                if (!match) {
-                    return undefined;
-                }
-                if (!ts.contains(result, match)) {
-                    (result || (result = [])).push(match);
-                }
-            }
-            return result;
-        }
-        // The signatures of a union type are those signatures that are present in each of the constituent types.
-        // Generic signatures must match exactly, but non-generic signatures are allowed to have extra optional
-        // parameters and may differ in return types. When signatures differ in return types, the resulting return
-        // type is the union of the constituent return types.
-        function getUnionSignatures(types, kind) {
-            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
-                    var signature = _a[_i];
-                    // Only process signatures with parameter lists that aren't already in the result list
-                    if (!result || !findMatchingSignature(result, signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true)) {
-                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
-                        if (unionSignatures) {
-                            var s = signature;
-                            // Union the result types when more than one signature matches
-                            if (unionSignatures.length > 1) {
-                                s = cloneSignature(signature);
-                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisType; })) {
-                                    s.thisType = getUnionType(ts.map(unionSignatures, function (sig) { return sig.thisType || anyType; }));
-                                }
-                                // Clear resolved return type we possibly got from cloneSignature
-                                s.resolvedReturnType = undefined;
-                                s.unionSignatures = unionSignatures;
-                            }
-                            (result || (result = [])).push(s);
-                        }
-                    }
-                }
-            }
-            return result || emptyArray;
-        }
-        function getUnionIndexInfo(types, kind) {
-            var indexTypes = [];
-            var isAnyReadonly = false;
-            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
-                var type = types_1[_i];
-                var indexInfo = getIndexInfoOfType(type, kind);
-                if (!indexInfo) {
-                    return undefined;
-                }
-                indexTypes.push(indexInfo.type);
-                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
-            }
-            return createIndexInfo(getUnionType(indexTypes), isAnyReadonly);
-        }
-        function resolveUnionTypeMembers(type) {
-            // The members and properties collections are empty for union types. To get all properties of a union
-            // type use getPropertiesOfType (only the language service uses this).
-            var callSignatures = getUnionSignatures(type.types, 0 /* Call */);
-            var constructSignatures = getUnionSignatures(type.types, 1 /* Construct */);
-            var stringIndexInfo = getUnionIndexInfo(type.types, 0 /* String */);
-            var numberIndexInfo = getUnionIndexInfo(type.types, 1 /* Number */);
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function intersectTypes(type1, type2) {
-            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
-        }
-        function intersectIndexInfos(info1, info2) {
-            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
-        }
-        function resolveIntersectionTypeMembers(type) {
-            // The members and properties collections are empty for intersection types. To get all properties of an
-            // intersection type use getPropertiesOfType (only the language service uses this).
-            var callSignatures = emptyArray;
-            var constructSignatures = emptyArray;
-            var stringIndexInfo = undefined;
-            var numberIndexInfo = undefined;
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0 /* Call */));
-                constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(t, 1 /* Construct */));
-                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0 /* String */));
-                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1 /* Number */));
-            }
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function resolveAnonymousTypeMembers(type) {
-            var symbol = type.symbol;
-            if (type.target) {
-                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, /*mappingThisOnly*/ false);
-                var callSignatures = instantiateList(getSignaturesOfType(type.target, 0 /* Call */), type.mapper, instantiateSignature);
-                var constructSignatures = instantiateList(getSignaturesOfType(type.target, 1 /* Construct */), type.mapper, instantiateSignature);
-                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0 /* String */), type.mapper);
-                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1 /* Number */), type.mapper);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-            }
-            else if (symbol.flags & 2048 /* TypeLiteral */) {
-                var members = symbol.members;
-                var callSignatures = getSignaturesOfSymbol(members["__call"]);
-                var constructSignatures = getSignaturesOfSymbol(members["__new"]);
-                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
-                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-            }
-            else {
-                // Combinations of function, class, enum and module
-                var members = emptySymbols;
-                var constructSignatures = emptyArray;
-                if (symbol.flags & 1952 /* HasExports */) {
-                    members = getExportsOfSymbol(symbol);
-                }
-                if (symbol.flags & 32 /* Class */) {
-                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
-                    constructSignatures = getSignaturesOfSymbol(symbol.members["__constructor"]);
-                    if (!constructSignatures.length) {
-                        constructSignatures = getDefaultConstructSignatures(classType);
-                    }
-                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-                    if (baseConstructorType.flags & 80896 /* ObjectType */) {
-                        members = createSymbolTable(getNamedMembers(members));
-                        addInheritedMembers(members, getPropertiesOfObjectType(baseConstructorType));
-                    }
-                }
-                var numberIndexInfo = symbol.flags & 384 /* Enum */ ? enumNumberIndexInfo : undefined;
-                setObjectTypeMembers(type, members, emptyArray, constructSignatures, undefined, numberIndexInfo);
-                // We resolve the members before computing the signatures because a signature may use
-                // typeof with a qualified name expression that circularly references the type we are
-                // in the process of resolving (see issue #6072). The temporarily empty signature list
-                // will never be observed because a qualified name can't reference signatures.
-                if (symbol.flags & (16 /* Function */ | 8192 /* Method */)) {
-                    type.callSignatures = getSignaturesOfSymbol(symbol);
-                }
-            }
-        }
-        function resolveStructuredTypeMembers(type) {
-            if (!type.members) {
-                if (type.flags & 4096 /* Reference */) {
-                    resolveTypeReferenceMembers(type);
-                }
-                else if (type.flags & (1024 /* Class */ | 2048 /* Interface */)) {
-                    resolveClassOrInterfaceMembers(type);
-                }
-                else if (type.flags & 65536 /* Anonymous */) {
-                    resolveAnonymousTypeMembers(type);
-                }
-                else if (type.flags & 8192 /* Tuple */) {
-                    resolveTupleTypeMembers(type);
-                }
-                else if (type.flags & 16384 /* Union */) {
-                    resolveUnionTypeMembers(type);
-                }
-                else if (type.flags & 32768 /* Intersection */) {
-                    resolveIntersectionTypeMembers(type);
-                }
-            }
-            return type;
-        }
-        /** Return properties of an object type or an empty array for other types */
-        function getPropertiesOfObjectType(type) {
-            if (type.flags & 80896 /* ObjectType */) {
-                return resolveStructuredTypeMembers(type).properties;
-            }
-            return emptyArray;
-        }
-        /** If the given type is an object type and that type has a property by the given name,
-         * return the symbol for that property. Otherwise return undefined. */
-        function getPropertyOfObjectType(type, name) {
-            if (type.flags & 80896 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (ts.hasProperty(resolved.members, name)) {
-                    var symbol = resolved.members[name];
-                    if (symbolIsValue(symbol)) {
-                        return symbol;
-                    }
-                }
-            }
-        }
-        function getPropertiesOfUnionOrIntersectionType(type) {
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var current = _a[_i];
-                for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    getPropertyOfUnionOrIntersectionType(type, prop.name);
-                }
-                // The properties of a union type are those that are present in all constituent types, so
-                // we only need to check the properties of the first type
-                if (type.flags & 16384 /* Union */) {
-                    break;
-                }
-            }
-            return type.resolvedProperties ? symbolsToArray(type.resolvedProperties) : emptyArray;
-        }
-        function getPropertiesOfType(type) {
-            type = getApparentType(type);
-            return type.flags & 49152 /* UnionOrIntersection */ ? getPropertiesOfUnionOrIntersectionType(type) : getPropertiesOfObjectType(type);
-        }
-        /**
-         * The apparent type of a type parameter is the base constraint instantiated with the type parameter
-         * as the type argument for the 'this' type.
-         */
-        function getApparentTypeOfTypeParameter(type) {
-            if (!type.resolvedApparentType) {
-                var constraintType = getConstraintOfTypeParameter(type);
-                while (constraintType && constraintType.flags & 512 /* TypeParameter */) {
-                    constraintType = getConstraintOfTypeParameter(constraintType);
-                }
-                type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type);
-            }
-            return type.resolvedApparentType;
-        }
-        /**
-         * For a type parameter, return the base constraint of the type parameter. For the string, number,
-         * boolean, and symbol primitive types, return the corresponding object types. Otherwise return the
-         * type itself. Note that the apparent type of a union type is the union type itself.
-         */
-        function getApparentType(type) {
-            if (type.flags & 512 /* TypeParameter */) {
-                type = getApparentTypeOfTypeParameter(type);
-            }
-            if (type.flags & 258 /* StringLike */) {
-                type = globalStringType;
-            }
-            else if (type.flags & 132 /* NumberLike */) {
-                type = globalNumberType;
-            }
-            else if (type.flags & 8 /* Boolean */) {
-                type = globalBooleanType;
-            }
-            else if (type.flags & 16777216 /* ESSymbol */) {
-                type = getGlobalESSymbolType();
-            }
-            return type;
-        }
-        function createUnionOrIntersectionProperty(containingType, name) {
-            var types = containingType.types;
-            var props;
-            // Flags we want to propagate to the result if they exist in all source symbols
-            var commonFlags = (containingType.flags & 32768 /* Intersection */) ? 536870912 /* Optional */ : 0 /* None */;
-            for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
-                var current = types_2[_i];
-                var type = getApparentType(current);
-                if (type !== unknownType) {
-                    var prop = getPropertyOfType(type, name);
-                    if (prop && !(getDeclarationFlagsFromSymbol(prop) & (8 /* Private */ | 16 /* Protected */))) {
-                        commonFlags &= prop.flags;
-                        if (!props) {
-                            props = [prop];
-                        }
-                        else if (!ts.contains(props, prop)) {
-                            props.push(prop);
-                        }
-                    }
-                    else if (containingType.flags & 16384 /* Union */) {
-                        // A union type requires the property to be present in all constituent types
-                        return undefined;
-                    }
-                }
-            }
-            if (!props) {
-                return undefined;
-            }
-            if (props.length === 1) {
-                return props[0];
-            }
-            var propTypes = [];
-            var declarations = [];
-            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
-                var prop = props_1[_a];
-                if (prop.declarations) {
-                    ts.addRange(declarations, prop.declarations);
-                }
-                propTypes.push(getTypeOfSymbol(prop));
-            }
-            var result = createSymbol(4 /* Property */ |
-                67108864 /* Transient */ |
-                268435456 /* SyntheticProperty */ |
-                commonFlags, name);
-            result.containingType = containingType;
-            result.declarations = declarations;
-            result.type = containingType.flags & 16384 /* Union */ ? getUnionType(propTypes) : getIntersectionType(propTypes);
-            return result;
-        }
-        function getPropertyOfUnionOrIntersectionType(type, name) {
-            var properties = type.resolvedProperties || (type.resolvedProperties = {});
-            if (ts.hasProperty(properties, name)) {
-                return properties[name];
-            }
-            var property = createUnionOrIntersectionProperty(type, name);
-            if (property) {
-                properties[name] = property;
-            }
-            return property;
-        }
-        // Return the symbol for the property with the given name in the given type. Creates synthetic union properties when
-        // necessary, maps primitive types and type parameters are to their apparent types, and augments with properties from
-        // Object and Function as appropriate.
-        function getPropertyOfType(type, name) {
-            type = getApparentType(type);
-            if (type.flags & 80896 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (ts.hasProperty(resolved.members, name)) {
-                    var symbol = resolved.members[name];
-                    if (symbolIsValue(symbol)) {
-                        return symbol;
-                    }
-                }
-                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
-                    var symbol = getPropertyOfObjectType(globalFunctionType, name);
-                    if (symbol) {
-                        return symbol;
-                    }
-                }
-                return getPropertyOfObjectType(globalObjectType, name);
-            }
-            if (type.flags & 49152 /* UnionOrIntersection */) {
-                return getPropertyOfUnionOrIntersectionType(type, name);
-            }
-            return undefined;
-        }
-        function getSignaturesOfStructuredType(type, kind) {
-            if (type.flags & 130048 /* StructuredType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 /* Call */ ? resolved.callSignatures : resolved.constructSignatures;
-            }
-            return emptyArray;
-        }
-        /**
-         * Return the signatures of the given kind in the given type. Creates synthetic union signatures when necessary and
-         * maps primitive types and type parameters are to their apparent types.
-         */
-        function getSignaturesOfType(type, kind) {
-            return getSignaturesOfStructuredType(getApparentType(type), kind);
-        }
-        function getIndexInfoOfStructuredType(type, kind) {
-            if (type.flags & 130048 /* StructuredType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 /* String */ ? resolved.stringIndexInfo : resolved.numberIndexInfo;
-            }
-        }
-        function getIndexTypeOfStructuredType(type, kind) {
-            var info = getIndexInfoOfStructuredType(type, kind);
-            return info && info.type;
-        }
-        // Return the indexing info of the given kind in the given type. Creates synthetic union index types when necessary and
-        // maps primitive types and type parameters are to their apparent types.
-        function getIndexInfoOfType(type, kind) {
-            return getIndexInfoOfStructuredType(getApparentType(type), kind);
-        }
-        // Return the index type of the given kind in the given type. Creates synthetic union index types when necessary and
-        // maps primitive types and type parameters are to their apparent types.
-        function getIndexTypeOfType(type, kind) {
-            return getIndexTypeOfStructuredType(getApparentType(type), kind);
-        }
-        function getImplicitIndexTypeOfType(type, kind) {
-            if (isObjectLiteralType(type)) {
-                var propTypes = [];
-                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
-                        propTypes.push(getTypeOfSymbol(prop));
-                    }
-                }
-                if (propTypes.length) {
-                    return getUnionType(propTypes);
-                }
-            }
-            return undefined;
-        }
-        function getTypeParametersFromJSDocTemplate(declaration) {
-            if (declaration.flags & 134217728 /* JavaScriptFile */) {
-                var templateTag = ts.getJSDocTemplateTag(declaration);
-                if (templateTag) {
-                    return getTypeParametersFromDeclaration(templateTag.typeParameters);
-                }
-            }
-            return undefined;
-        }
-        // Return list of type parameters with duplicates removed (duplicate identifier errors are generated in the actual
-        // type checking functions).
-        function getTypeParametersFromDeclaration(typeParameterDeclarations) {
-            var result = [];
-            ts.forEach(typeParameterDeclarations, function (node) {
-                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
-                if (!ts.contains(result, tp)) {
-                    result.push(tp);
-                }
-            });
-            return result;
-        }
-        function symbolsToArray(symbols) {
-            var result = [];
-            for (var id in symbols) {
-                if (!isReservedMemberName(id)) {
-                    result.push(symbols[id]);
-                }
-            }
-            return result;
-        }
-        function isOptionalParameter(node) {
-            if (node.flags & 134217728 /* JavaScriptFile */) {
-                if (node.type && node.type.kind === 268 /* JSDocOptionalType */) {
-                    return true;
-                }
-                var paramTag = ts.getCorrespondingJSDocParameterTag(node);
-                if (paramTag) {
-                    if (paramTag.isBracketed) {
-                        return true;
-                    }
-                    if (paramTag.typeExpression) {
-                        return paramTag.typeExpression.type.kind === 268 /* JSDocOptionalType */;
-                    }
-                }
-            }
-            if (ts.hasQuestionToken(node)) {
-                return true;
-            }
-            if (node.initializer) {
-                var signatureDeclaration = node.parent;
-                var signature = getSignatureFromDeclaration(signatureDeclaration);
-                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
-                ts.Debug.assert(parameterIndex >= 0);
-                return parameterIndex >= signature.minArgumentCount;
-            }
-            return false;
-        }
-        function createTypePredicateFromTypePredicateNode(node) {
-            if (node.parameterName.kind === 69 /* Identifier */) {
-                var parameterName = node.parameterName;
-                return {
-                    kind: 1 /* Identifier */,
-                    parameterName: parameterName ? parameterName.text : undefined,
-                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
-                    type: getTypeFromTypeNode(node.type)
-                };
-            }
-            else {
-                return {
-                    kind: 0 /* This */,
-                    type: getTypeFromTypeNode(node.type)
-                };
-            }
-        }
-        function getSignatureFromDeclaration(declaration) {
-            var links = getNodeLinks(declaration);
-            if (!links.resolvedSignature) {
-                var parameters = [];
-                var hasStringLiterals = false;
-                var minArgumentCount = -1;
-                var thisType = undefined;
-                var hasThisParameter = void 0;
-                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
-                // If this is a JSDoc construct signature, then skip the first parameter in the
-                // parameter list.  The first parameter represents the return type of the construct
-                // signature.
-                for (var i = isJSConstructSignature ? 1 : 0, n = declaration.parameters.length; i < n; i++) {
-                    var param = declaration.parameters[i];
-                    var paramSymbol = param.symbol;
-                    // Include parameter symbol instead of property symbol in the signature
-                    if (paramSymbol && !!(paramSymbol.flags & 4 /* Property */) && !ts.isBindingPattern(param.name)) {
-                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455 /* Value */, undefined, undefined);
-                        paramSymbol = resolvedSymbol;
-                    }
-                    if (i === 0 && paramSymbol.name === "this") {
-                        hasThisParameter = true;
-                        thisType = param.type ? getTypeFromTypeNode(param.type) : unknownType;
-                    }
-                    else {
-                        parameters.push(paramSymbol);
-                    }
-                    if (param.type && param.type.kind === 166 /* StringLiteralType */) {
-                        hasStringLiterals = true;
-                    }
-                    if (param.initializer || param.questionToken || param.dotDotDotToken) {
-                        if (minArgumentCount < 0) {
-                            minArgumentCount = i - (hasThisParameter ? 1 : 0);
-                        }
-                    }
-                    else {
-                        // If we see any required parameters, it means the prior ones were not in fact optional.
-                        minArgumentCount = -1;
-                    }
-                }
-                // If only one accessor includes a this-type annotation, the other behaves as if it had the same type annotation
-                if ((declaration.kind === 149 /* GetAccessor */ || declaration.kind === 150 /* SetAccessor */) &&
-                    !ts.hasDynamicName(declaration) &&
-                    (!hasThisParameter || thisType === unknownType)) {
-                    var otherKind = declaration.kind === 149 /* GetAccessor */ ? 150 /* SetAccessor */ : 149 /* GetAccessor */;
-                    var setter = ts.getDeclarationOfKind(declaration.symbol, otherKind);
-                    thisType = getAnnotatedAccessorThisType(setter);
-                }
-                if (minArgumentCount < 0) {
-                    minArgumentCount = declaration.parameters.length - (hasThisParameter ? 1 : 0);
-                }
-                if (isJSConstructSignature) {
-                    minArgumentCount--;
-                }
-                var classType = declaration.kind === 148 /* Constructor */ ?
-                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
-                    : undefined;
-                var typeParameters = classType ? classType.localTypeParameters :
-                    declaration.typeParameters ? getTypeParametersFromDeclaration(declaration.typeParameters) :
-                        getTypeParametersFromJSDocTemplate(declaration);
-                var returnType = getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType);
-                var typePredicate = declaration.type && declaration.type.kind === 154 /* TypePredicate */ ?
-                    createTypePredicateFromTypePredicateNode(declaration.type) :
-                    undefined;
-                links.resolvedSignature = createSignature(declaration, typeParameters, thisType, parameters, returnType, typePredicate, minArgumentCount, ts.hasRestParameter(declaration), hasStringLiterals);
-            }
-            return links.resolvedSignature;
-        }
-        function getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType) {
-            if (isJSConstructSignature) {
-                return getTypeFromTypeNode(declaration.parameters[0].type);
-            }
-            else if (classType) {
-                return classType;
-            }
-            else if (declaration.type) {
-                return getTypeFromTypeNode(declaration.type);
-            }
-            if (declaration.flags & 134217728 /* JavaScriptFile */) {
-                var type = getReturnTypeFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            // TypeScript 1.0 spec (April 2014):
-            // If only one accessor includes a type annotation, the other behaves as if it had the same type annotation.
-            if (declaration.kind === 149 /* GetAccessor */ && !ts.hasDynamicName(declaration)) {
-                var setter = ts.getDeclarationOfKind(declaration.symbol, 150 /* SetAccessor */);
-                return getAnnotatedAccessorType(setter);
-            }
-            if (ts.nodeIsMissing(declaration.body)) {
-                return anyType;
-            }
-        }
-        function getSignaturesOfSymbol(symbol) {
-            if (!symbol)
-                return emptyArray;
-            var result = [];
-            for (var i = 0, len = symbol.declarations.length; i < len; i++) {
-                var node = symbol.declarations[i];
-                switch (node.kind) {
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 269 /* JSDocFunctionType */:
-                        // Don't include signature if node is the implementation of an overloaded function. A node is considered
-                        // an implementation node if it has a body and the previous node is of the same kind and immediately
-                        // precedes the implementation node (i.e. has the same parent and ends where the implementation starts).
-                        if (i > 0 && node.body) {
-                            var previous = symbol.declarations[i - 1];
-                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
-                                break;
-                            }
-                        }
-                        result.push(getSignatureFromDeclaration(node));
-                }
-            }
-            return result;
-        }
-        function resolveExternalModuleTypeByLiteral(name) {
-            var moduleSym = resolveExternalModuleName(name, name);
-            if (moduleSym) {
-                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
-                if (resolvedModuleSymbol) {
-                    return getTypeOfSymbol(resolvedModuleSymbol);
-                }
-            }
-            return anyType;
-        }
-        function getReturnTypeOfSignature(signature) {
-            if (!signature.resolvedReturnType) {
-                if (!pushTypeResolution(signature, 3 /* ResolvedReturnType */)) {
-                    return unknownType;
-                }
-                var type = void 0;
-                if (signature.target) {
-                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
-                }
-                else if (signature.unionSignatures) {
-                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature));
-                }
-                else {
-                    type = getReturnTypeFromBody(signature.declaration);
-                }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var declaration = signature.declaration;
-                        if (declaration.name) {
-                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
-                        }
-                    }
-                }
-                signature.resolvedReturnType = type;
-            }
-            return signature.resolvedReturnType;
-        }
-        function getRestTypeOfSignature(signature) {
-            if (signature.hasRestParameter) {
-                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
-                if (type.flags & 4096 /* Reference */ && type.target === globalArrayType) {
-                    return type.typeArguments[0];
-                }
-            }
-            return anyType;
-        }
-        function getSignatureInstantiation(signature, typeArguments) {
-            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), /*eraseTypeParameters*/ true);
-        }
-        function getErasedSignature(signature) {
-            if (!signature.typeParameters)
-                return signature;
-            if (!signature.erasedSignatureCache) {
-                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), /*eraseTypeParameters*/ true);
-            }
-            return signature.erasedSignatureCache;
-        }
-        function getOrCreateTypeFromSignature(signature) {
-            // There are two ways to declare a construct signature, one is by declaring a class constructor
-            // using the constructor keyword, and the other is declaring a bare construct signature in an
-            // object type literal or interface (using the new keyword). Each way of declaring a constructor
-            // will result in a different declaration kind.
-            if (!signature.isolatedSignatureType) {
-                var isConstructor = signature.declaration.kind === 148 /* Constructor */ || signature.declaration.kind === 152 /* ConstructSignature */;
-                var type = createObjectType(65536 /* Anonymous */ | 262144 /* FromSignature */);
-                type.members = emptySymbols;
-                type.properties = emptyArray;
-                type.callSignatures = !isConstructor ? [signature] : emptyArray;
-                type.constructSignatures = isConstructor ? [signature] : emptyArray;
-                signature.isolatedSignatureType = type;
-            }
-            return signature.isolatedSignatureType;
-        }
-        function getIndexSymbol(symbol) {
-            return symbol.members["__index"];
-        }
-        function getIndexDeclarationOfSymbol(symbol, kind) {
-            var syntaxKind = kind === 1 /* Number */ ? 130 /* NumberKeyword */ : 132 /* StringKeyword */;
-            var indexSymbol = getIndexSymbol(symbol);
-            if (indexSymbol) {
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var node = decl;
-                    if (node.parameters.length === 1) {
-                        var parameter = node.parameters[0];
-                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
-                            return node;
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function createIndexInfo(type, isReadonly, declaration) {
-            return { type: type, isReadonly: isReadonly, declaration: declaration };
-        }
-        function getIndexInfoOfSymbol(symbol, kind) {
-            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
-            if (declaration) {
-                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (declaration.flags & 64 /* Readonly */) !== 0, declaration);
-            }
-            return undefined;
-        }
-        function getConstraintDeclaration(type) {
-            return ts.getDeclarationOfKind(type.symbol, 141 /* TypeParameter */).constraint;
-        }
-        function hasConstraintReferenceTo(type, target) {
-            var checked;
-            while (type && !(type.flags & 33554432 /* ThisType */) && type.flags & 512 /* TypeParameter */ && !ts.contains(checked, type)) {
-                if (type === target) {
-                    return true;
-                }
-                (checked || (checked = [])).push(type);
-                var constraintDeclaration = getConstraintDeclaration(type);
-                type = constraintDeclaration && getTypeFromTypeNode(constraintDeclaration);
-            }
-            return false;
-        }
-        function getConstraintOfTypeParameter(typeParameter) {
-            if (!typeParameter.constraint) {
-                if (typeParameter.target) {
-                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
-                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
-                }
-                else {
-                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
-                    var constraint = getTypeFromTypeNode(constraintDeclaration);
-                    if (hasConstraintReferenceTo(constraint, typeParameter)) {
-                        error(constraintDeclaration, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
-                        constraint = unknownType;
-                    }
-                    typeParameter.constraint = constraint;
-                }
-            }
-            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
-        }
-        function getParentSymbolOfTypeParameter(typeParameter) {
-            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 141 /* TypeParameter */).parent);
-        }
-        function getTypeListId(types) {
-            if (types) {
-                switch (types.length) {
-                    case 1:
-                        return "" + types[0].id;
-                    case 2:
-                        return types[0].id + "," + types[1].id;
-                    default:
-                        var result = "";
-                        for (var i = 0; i < types.length; i++) {
-                            if (i > 0) {
-                                result += ",";
-                            }
-                            result += types[i].id;
-                        }
-                        return result;
-                }
-            }
-            return "";
-        }
-        // This function is used to propagate certain flags when creating new object type references and union types.
-        // It is only necessary to do so if a constituent type might be the undefined type, the null type, the type
-        // of an object literal or the anyFunctionType. This is because there are operations in the type checker
-        // that care about the presence of such types at arbitrary depth in a containing type.
-        function getPropagatingFlagsOfTypes(types, excludeKinds) {
-            var result = 0;
-            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
-                var type = types_3[_i];
-                if (!(type.flags & excludeKinds)) {
-                    result |= type.flags;
-                }
-            }
-            return result & 14680064 /* PropagatingFlags */;
-        }
-        function createTypeReference(target, typeArguments) {
-            var id = getTypeListId(typeArguments);
-            var type = target.instantiations[id];
-            if (!type) {
-                var propagatedFlags = typeArguments ? getPropagatingFlagsOfTypes(typeArguments, /*excludeKinds*/ 0) : 0;
-                var flags = 4096 /* Reference */ | propagatedFlags;
-                type = target.instantiations[id] = createObjectType(flags, target.symbol);
-                type.target = target;
-                type.typeArguments = typeArguments;
-            }
-            return type;
-        }
-        // Get type from reference to class or interface
-        function getTypeFromClassOrInterfaceReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
-            var typeParameters = type.localTypeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */), typeParameters.length);
-                    return unknownType;
-                }
-                // In a type reference, the outer type parameters of the referenced class or interface are automatically
-                // supplied as type arguments and the type reference only specifies arguments for the local type parameters
-                // of the class or interface.
-                return createTypeReference(type, ts.concatenate(type.outerTypeParameters, ts.map(node.typeArguments, getTypeFromTypeNode)));
-            }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
-                return unknownType;
-            }
-            return type;
-        }
-        // Get type from reference to type alias. When a type alias is generic, the declared type of the type alias may include
-        // references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
-        // declared type. Instantiations are cached using the type identities of the type arguments as the key.
-        function getTypeFromTypeAliasReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var links = getSymbolLinks(symbol);
-            var typeParameters = links.typeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, symbolToString(symbol), typeParameters.length);
-                    return unknownType;
-                }
-                var typeArguments = ts.map(node.typeArguments, getTypeFromTypeNode);
-                var id = getTypeListId(typeArguments);
-                return links.instantiations[id] || (links.instantiations[id] = instantiateType(type, createTypeMapper(typeParameters, typeArguments)));
-            }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
-            }
-            return type;
-        }
-        // Get type from reference to named type that cannot be generic (enum or type parameter)
-        function getTypeFromNonGenericTypeReference(node, symbol) {
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
-            }
-            return getDeclaredTypeOfSymbol(symbol);
-        }
-        function getTypeReferenceName(node) {
-            switch (node.kind) {
-                case 155 /* TypeReference */:
-                    return node.typeName;
-                case 267 /* JSDocTypeReference */:
-                    return node.name;
-                case 194 /* ExpressionWithTypeArguments */:
-                    // We only support expressions that are simple qualified names. For other
-                    // expressions this produces undefined.
-                    if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                        return node.expression;
-                    }
-            }
-            return undefined;
-        }
-        function resolveTypeReferenceName(node, typeReferenceName) {
-            if (!typeReferenceName) {
-                return unknownSymbol;
-            }
-            return resolveEntityName(typeReferenceName, 793056 /* Type */) || unknownSymbol;
-        }
-        function getTypeReferenceType(node, symbol) {
-            if (symbol === unknownSymbol) {
-                return unknownType;
-            }
-            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
-                return getTypeFromClassOrInterfaceReference(node, symbol);
-            }
-            if (symbol.flags & 524288 /* TypeAlias */) {
-                return getTypeFromTypeAliasReference(node, symbol);
-            }
-            if (symbol.flags & 107455 /* Value */ && node.kind === 267 /* JSDocTypeReference */) {
-                // A JSDocTypeReference may have resolved to a value (as opposed to a type). In
-                // that case, the type of this reference is just the type of the value we resolved
-                // to.
-                return getTypeOfSymbol(symbol);
-            }
-            return getTypeFromNonGenericTypeReference(node, symbol);
-        }
-        function getTypeFromTypeReference(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var symbol = void 0;
-                var type = void 0;
-                if (node.kind === 267 /* JSDocTypeReference */) {
-                    var typeReferenceName = getTypeReferenceName(node);
-                    symbol = resolveTypeReferenceName(node, typeReferenceName);
-                    type = getTypeReferenceType(node, symbol);
-                    links.resolvedSymbol = symbol;
-                    links.resolvedType = type;
-                }
-                else {
-                    // We only support expressions that are simple qualified names. For other expressions this produces undefined.
-                    var typeNameOrExpression = node.kind === 155 /* TypeReference */ ? node.typeName :
-                        ts.isSupportedExpressionWithTypeArguments(node) ? node.expression :
-                            undefined;
-                    symbol = typeNameOrExpression && resolveEntityName(typeNameOrExpression, 793056 /* Type */) || unknownSymbol;
-                    type = symbol === unknownSymbol ? unknownType :
-                        symbol.flags & (32 /* Class */ | 64 /* Interface */) ? getTypeFromClassOrInterfaceReference(node, symbol) :
-                            symbol.flags & 524288 /* TypeAlias */ ? getTypeFromTypeAliasReference(node, symbol) :
-                                getTypeFromNonGenericTypeReference(node, symbol);
-                }
-                // Cache both the resolved symbol and the resolved type. The resolved symbol is needed in when we check the
-                // type reference in checkTypeReferenceOrExpressionWithTypeArguments.
-                links.resolvedSymbol = symbol;
-                links.resolvedType = type;
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeQueryNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                // TypeScript 1.0 spec (April 2014): 3.6.3
-                // The expression is processed as an identifier expression (section 4.3)
-                // or property access expression(section 4.10),
-                // the widened type(section 3.9) of which becomes the result.
-                links.resolvedType = getWidenedType(checkExpression(node.exprName));
-            }
-            return links.resolvedType;
-        }
-        function getTypeOfGlobalSymbol(symbol, arity) {
-            function getTypeDeclaration(symbol) {
-                var declarations = symbol.declarations;
-                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
-                    var declaration = declarations_3[_i];
-                    switch (declaration.kind) {
-                        case 221 /* ClassDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                            return declaration;
-                    }
-                }
-            }
-            if (!symbol) {
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            var type = getDeclaredTypeOfSymbol(symbol);
-            if (!(type.flags & 80896 /* ObjectType */)) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            if ((type.typeParameters ? type.typeParameters.length : 0) !== arity) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            return type;
-        }
-        function getGlobalValueSymbol(name) {
-            return getGlobalSymbol(name, 107455 /* Value */, ts.Diagnostics.Cannot_find_global_value_0);
-        }
-        function getGlobalTypeSymbol(name) {
-            return getGlobalSymbol(name, 793056 /* Type */, ts.Diagnostics.Cannot_find_global_type_0);
-        }
-        function getGlobalSymbol(name, meaning, diagnostic) {
-            return resolveName(undefined, name, meaning, diagnostic, name);
-        }
-        function getGlobalType(name, arity) {
-            if (arity === void 0) { arity = 0; }
-            return getTypeOfGlobalSymbol(getGlobalTypeSymbol(name), arity);
-        }
-        /**
-         * Returns a type that is inside a namespace at the global scope, e.g.
-         * getExportedTypeFromNamespace('JSX', 'Element') returns the JSX.Element type
-         */
-        function getExportedTypeFromNamespace(namespace, name) {
-            var namespaceSymbol = getGlobalSymbol(namespace, 1536 /* Namespace */, /*diagnosticMessage*/ undefined);
-            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793056 /* Type */);
-            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
-        }
-        /**
-          * Creates a TypeReference for a generic `TypedPropertyDescriptor<T>`.
-          */
-        function createTypedPropertyDescriptorType(propertyType) {
-            var globalTypedPropertyDescriptorType = getGlobalTypedPropertyDescriptorType();
-            return globalTypedPropertyDescriptorType !== emptyGenericType
-                ? createTypeReference(globalTypedPropertyDescriptorType, [propertyType])
-                : emptyObjectType;
-        }
-        /**
-         * Instantiates a global type that is generic with some element type, and returns that instantiation.
-         */
-        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
-            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
-        }
-        function createIterableType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableType(), [elementType]);
-        }
-        function createIterableIteratorType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(), [elementType]);
-        }
-        function createArrayType(elementType) {
-            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
-        }
-        function getTypeFromArrayTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
-            }
-            return links.resolvedType;
-        }
-        function createTupleType(elementTypes) {
-            var id = getTypeListId(elementTypes);
-            return tupleTypes[id] || (tupleTypes[id] = createNewTupleType(elementTypes));
-        }
-        function createNewTupleType(elementTypes) {
-            var propagatedFlags = getPropagatingFlagsOfTypes(elementTypes, /*excludeKinds*/ 0);
-            var type = createObjectType(8192 /* Tuple */ | propagatedFlags);
-            type.elementTypes = elementTypes;
-            return type;
-        }
-        function getTypeFromTupleTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNode));
-            }
-            return links.resolvedType;
-        }
-        function addTypeToSet(typeSet, type, typeSetKind) {
-            if (type.flags & typeSetKind) {
-                addTypesToSet(typeSet, type.types, typeSetKind);
-            }
-            else if (type.flags & (1 /* Any */ | 32 /* Undefined */ | 64 /* Null */)) {
-                if (type.flags & 1 /* Any */)
-                    typeSet.containsAny = true;
-                if (type.flags & 32 /* Undefined */)
-                    typeSet.containsUndefined = true;
-                if (type.flags & 64 /* Null */)
-                    typeSet.containsNull = true;
-            }
-            else if (type !== neverType && !ts.contains(typeSet, type)) {
-                typeSet.push(type);
-            }
-        }
-        // Add the given types to the given type set. Order is preserved, duplicates are removed,
-        // and nested types of the given kind are flattened into the set.
-        function addTypesToSet(typeSet, types, typeSetKind) {
-            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
-                var type = types_4[_i];
-                addTypeToSet(typeSet, type, typeSetKind);
-            }
-        }
-        function isSubtypeOfAny(candidate, types) {
-            for (var i = 0, len = types.length; i < len; i++) {
-                if (candidate !== types[i] && isTypeSubtypeOf(candidate, types[i])) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function removeSubtypes(types) {
-            var i = types.length;
-            while (i > 0) {
-                i--;
-                if (isSubtypeOfAny(types[i], types)) {
-                    types.splice(i, 1);
-                }
-            }
-        }
-        // We reduce the constituent type set to only include types that aren't subtypes of other types, unless
-        // the noSubtypeReduction flag is specified, in which case we perform a simple deduplication based on
-        // object identity. Subtype reduction is possible only when union types are known not to circularly
-        // reference themselves (as is the case with union types created by expression constructs such as array
-        // literals and the || and ?: operators). Named types can circularly reference themselves and therefore
-        // cannot be deduplicated during their declaration. For example, "type Item = string | (() => Item" is
-        // a named type that circularly references itself.
-        function getUnionType(types, noSubtypeReduction) {
-            if (types.length === 0) {
-                return neverType;
-            }
-            if (types.length === 1) {
-                return types[0];
-            }
-            var typeSet = [];
-            addTypesToSet(typeSet, types, 16384 /* Union */);
-            if (typeSet.containsAny) {
-                return anyType;
-            }
-            if (strictNullChecks) {
-                if (typeSet.containsNull)
-                    typeSet.push(nullType);
-                if (typeSet.containsUndefined)
-                    typeSet.push(undefinedType);
-            }
-            if (!noSubtypeReduction) {
-                removeSubtypes(typeSet);
-            }
-            if (typeSet.length === 0) {
-                return typeSet.containsNull ? nullType :
-                    typeSet.containsUndefined ? undefinedType :
-                        neverType;
-            }
-            else if (typeSet.length === 1) {
-                return typeSet[0];
-            }
-            var id = getTypeListId(typeSet);
-            var type = unionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 96 /* Nullable */);
-                type = unionTypes[id] = createObjectType(16384 /* Union */ | propagatedFlags);
-                type.types = typeSet;
-            }
-            return type;
-        }
-        function getTypeFromUnionTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), /*noSubtypeReduction*/ true);
-            }
-            return links.resolvedType;
-        }
-        // We do not perform structural deduplication on intersection types. Intersection types are created only by the &
-        // type operator and we can't reduce those because we want to support recursive intersection types. For example,
-        // a type alias of the form "type List<T> = T & { next: List<T> }" cannot be reduced during its declaration.
-        // Also, unlike union types, the order of the constituent types is preserved in order that overload resolution
-        // for intersections of types with signatures can be deterministic.
-        function getIntersectionType(types) {
-            if (types.length === 0) {
-                return emptyObjectType;
-            }
-            var typeSet = [];
-            addTypesToSet(typeSet, types, 32768 /* Intersection */);
-            if (typeSet.containsAny) {
-                return anyType;
-            }
-            if (strictNullChecks) {
-                if (typeSet.containsNull)
-                    typeSet.push(nullType);
-                if (typeSet.containsUndefined)
-                    typeSet.push(undefinedType);
-            }
-            if (typeSet.length === 1) {
-                return typeSet[0];
-            }
-            var id = getTypeListId(typeSet);
-            var type = intersectionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 96 /* Nullable */);
-                type = intersectionTypes[id] = createObjectType(32768 /* Intersection */ | propagatedFlags);
-                type.types = typeSet;
-            }
-            return type;
-        }
-        function getTypeFromIntersectionTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNode));
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                // Deferred resolution of members is handled by resolveObjectTypeMembers
-                links.resolvedType = createObjectType(65536 /* Anonymous */, node.symbol);
-            }
-            return links.resolvedType;
-        }
-        function getStringLiteralTypeForText(text) {
-            if (ts.hasProperty(stringLiteralTypes, text)) {
-                return stringLiteralTypes[text];
-            }
-            var type = stringLiteralTypes[text] = createType(256 /* StringLiteral */);
-            type.text = text;
-            return type;
-        }
-        function getTypeFromStringLiteralTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getStringLiteralTypeForText(ts.unescapeIdentifier(node.text));
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromJSDocVariadicType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var type = getTypeFromTypeNode(node.type);
-                links.resolvedType = type ? createArrayType(type) : unknownType;
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromJSDocTupleType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var types = ts.map(node.types, getTypeFromTypeNode);
-                links.resolvedType = createTupleType(types);
-            }
-            return links.resolvedType;
-        }
-        function getThisType(node) {
-            var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
-            var parent = container && container.parent;
-            if (parent && (ts.isClassLike(parent) || parent.kind === 222 /* InterfaceDeclaration */)) {
-                if (!(container.flags & 32 /* Static */) &&
-                    (container.kind !== 148 /* Constructor */ || ts.isNodeDescendentOf(node, container.body))) {
-                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
-                }
-            }
-            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
-            return unknownType;
-        }
-        function getTypeFromThisTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getThisType(node);
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeNode(node) {
-            switch (node.kind) {
-                case 117 /* AnyKeyword */:
-                case 258 /* JSDocAllType */:
-                case 259 /* JSDocUnknownType */:
-                    return anyType;
-                case 132 /* StringKeyword */:
-                    return stringType;
-                case 130 /* NumberKeyword */:
-                    return numberType;
-                case 120 /* BooleanKeyword */:
-                    return booleanType;
-                case 133 /* SymbolKeyword */:
-                    return esSymbolType;
-                case 103 /* VoidKeyword */:
-                    return voidType;
-                case 135 /* UndefinedKeyword */:
-                    return undefinedType;
-                case 93 /* NullKeyword */:
-                    return nullType;
-                case 127 /* NeverKeyword */:
-                    return neverType;
-                case 165 /* ThisType */:
-                case 97 /* ThisKeyword */:
-                    return getTypeFromThisTypeNode(node);
-                case 166 /* StringLiteralType */:
-                    return getTypeFromStringLiteralTypeNode(node);
-                case 155 /* TypeReference */:
-                case 267 /* JSDocTypeReference */:
-                    return getTypeFromTypeReference(node);
-                case 154 /* TypePredicate */:
-                    return booleanType;
-                case 194 /* ExpressionWithTypeArguments */:
-                    return getTypeFromTypeReference(node);
-                case 158 /* TypeQuery */:
-                    return getTypeFromTypeQueryNode(node);
-                case 160 /* ArrayType */:
-                case 260 /* JSDocArrayType */:
-                    return getTypeFromArrayTypeNode(node);
-                case 161 /* TupleType */:
-                    return getTypeFromTupleTypeNode(node);
-                case 162 /* UnionType */:
-                case 261 /* JSDocUnionType */:
-                    return getTypeFromUnionTypeNode(node);
-                case 163 /* IntersectionType */:
-                    return getTypeFromIntersectionTypeNode(node);
-                case 164 /* ParenthesizedType */:
-                case 263 /* JSDocNullableType */:
-                case 264 /* JSDocNonNullableType */:
-                case 271 /* JSDocConstructorType */:
-                case 272 /* JSDocThisType */:
-                case 268 /* JSDocOptionalType */:
-                    return getTypeFromTypeNode(node.type);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 159 /* TypeLiteral */:
-                case 269 /* JSDocFunctionType */:
-                case 265 /* JSDocRecordType */:
-                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
-                // This function assumes that an identifier or qualified name is a type expression
-                // Callers should first ensure this by calling isTypeNode
-                case 69 /* Identifier */:
-                case 139 /* QualifiedName */:
-                    var symbol = getSymbolAtLocation(node);
-                    return symbol && getDeclaredTypeOfSymbol(symbol);
-                case 262 /* JSDocTupleType */:
-                    return getTypeFromJSDocTupleType(node);
-                case 270 /* JSDocVariadicType */:
-                    return getTypeFromJSDocVariadicType(node);
-                default:
-                    return unknownType;
-            }
-        }
-        function instantiateList(items, mapper, instantiator) {
-            if (items && items.length) {
-                var result = [];
-                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
-                    var v = items_1[_i];
-                    result.push(instantiator(v, mapper));
-                }
-                return result;
-            }
-            return items;
-        }
-        function createUnaryTypeMapper(source, target) {
-            return function (t) { return t === source ? target : t; };
-        }
-        function createBinaryTypeMapper(source1, target1, source2, target2) {
-            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
-        }
-        function createArrayTypeMapper(sources, targets) {
-            return function (t) {
-                for (var i = 0; i < sources.length; i++) {
-                    if (t === sources[i]) {
-                        return targets ? targets[i] : anyType;
-                    }
-                }
-                return t;
-            };
-        }
-        function createTypeMapper(sources, targets) {
-            var count = sources.length;
-            var mapper = count == 1 ? createUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
-                count == 2 ? createBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
-                    createArrayTypeMapper(sources, targets);
-            mapper.mappedTypes = sources;
-            return mapper;
-        }
-        function createTypeEraser(sources) {
-            return createTypeMapper(sources, undefined);
-        }
-        function getInferenceMapper(context) {
-            if (!context.mapper) {
-                var mapper = function (t) {
-                    var typeParameters = context.typeParameters;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (t === typeParameters[i]) {
-                            context.inferences[i].isFixed = true;
-                            return getInferredType(context, i);
-                        }
-                    }
-                    return t;
-                };
-                mapper.mappedTypes = context.typeParameters;
-                mapper.context = context;
-                context.mapper = mapper;
-            }
-            return context.mapper;
-        }
-        function identityMapper(type) {
-            return type;
-        }
-        function combineTypeMappers(mapper1, mapper2) {
-            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
-            mapper.mappedTypes = mapper1.mappedTypes;
-            return mapper;
-        }
-        function cloneTypeParameter(typeParameter) {
-            var result = createType(512 /* TypeParameter */);
-            result.symbol = typeParameter.symbol;
-            result.target = typeParameter;
-            return result;
-        }
-        function cloneTypePredicate(predicate, mapper) {
-            if (ts.isIdentifierTypePredicate(predicate)) {
-                return {
-                    kind: 1 /* Identifier */,
-                    parameterName: predicate.parameterName,
-                    parameterIndex: predicate.parameterIndex,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
-            else {
-                return {
-                    kind: 0 /* This */,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
-        }
-        function instantiateSignature(signature, mapper, eraseTypeParameters) {
-            var freshTypeParameters;
-            var freshTypePredicate;
-            if (signature.typeParameters && !eraseTypeParameters) {
-                // First create a fresh set of type parameters, then include a mapping from the old to the
-                // new type parameters in the mapper function. Finally store this mapper in the new type
-                // parameters such that we can use it when instantiating constraints.
-                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
-                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
-                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
-                    var tp = freshTypeParameters_1[_i];
-                    tp.mapper = mapper;
-                }
-            }
-            if (signature.typePredicate) {
-                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
-            }
-            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisType && instantiateType(signature.thisType, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), instantiateType(signature.resolvedReturnType, mapper), freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasStringLiterals);
-            result.target = signature;
-            result.mapper = mapper;
-            return result;
-        }
-        function instantiateSymbol(symbol, mapper) {
-            if (symbol.flags & 16777216 /* Instantiated */) {
-                var links = getSymbolLinks(symbol);
-                // If symbol being instantiated is itself a instantiation, fetch the original target and combine the
-                // type mappers. This ensures that original type identities are properly preserved and that aliases
-                // always reference a non-aliases.
-                symbol = links.target;
-                mapper = combineTypeMappers(links.mapper, mapper);
-            }
-            // Keep the flags from the symbol we're instantiating.  Mark that is instantiated, and
-            // also transient so that we can just store data on it directly.
-            var result = createSymbol(16777216 /* Instantiated */ | 67108864 /* Transient */ | symbol.flags, symbol.name);
-            result.declarations = symbol.declarations;
-            result.parent = symbol.parent;
-            result.target = symbol;
-            result.mapper = mapper;
-            if (symbol.valueDeclaration) {
-                result.valueDeclaration = symbol.valueDeclaration;
-            }
-            return result;
-        }
-        function instantiateAnonymousType(type, mapper) {
-            if (mapper.instantiations) {
-                var cachedType = mapper.instantiations[type.id];
-                if (cachedType) {
-                    return cachedType;
-                }
-            }
-            else {
-                mapper.instantiations = [];
-            }
-            // Mark the anonymous type as instantiated such that our infinite instantiation detection logic can recognize it
-            var result = createObjectType(65536 /* Anonymous */ | 131072 /* Instantiated */, type.symbol);
-            result.target = type;
-            result.mapper = mapper;
-            mapper.instantiations[type.id] = result;
-            return result;
-        }
-        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
-            var mappedTypes = mapper.mappedTypes;
-            // Starting with the parent of the symbol's declaration, check if the mapper maps any of
-            // the type parameters introduced by enclosing declarations. We just pick the first
-            // declaration since multiple declarations will all have the same parent anyway.
-            var node = symbol.declarations[0].parent;
-            while (node) {
-                switch (node.kind) {
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                        var declaration = node;
-                        if (declaration.typeParameters) {
-                            for (var _i = 0, _a = declaration.typeParameters; _i < _a.length; _i++) {
-                                var d = _a[_i];
-                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
-                                    return true;
-                                }
-                            }
-                        }
-                        if (ts.isClassLike(node) || node.kind === 222 /* InterfaceDeclaration */) {
-                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
-                            if (thisType && ts.contains(mappedTypes, thisType)) {
-                                return true;
-                            }
-                        }
-                        break;
-                    case 225 /* ModuleDeclaration */:
-                    case 256 /* SourceFile */:
-                        return false;
-                }
-                node = node.parent;
-            }
-            return false;
-        }
-        function instantiateType(type, mapper) {
-            if (type && mapper !== identityMapper) {
-                if (type.flags & 512 /* TypeParameter */) {
-                    return mapper(type);
-                }
-                if (type.flags & 65536 /* Anonymous */) {
-                    // If the anonymous type originates in a declaration of a function, method, class, or
-                    // interface, in an object type literal, or in an object literal expression, we may need
-                    // to instantiate the type because it might reference a type parameter. We skip instantiation
-                    // if none of the type parameters that are in scope in the type's declaration are mapped by
-                    // the given mapper, however we can only do that analysis if the type isn't itself an
-                    // instantiation.
-                    return type.symbol &&
-                        type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */) &&
-                        (type.flags & 131072 /* Instantiated */ || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
-                        instantiateAnonymousType(type, mapper) : type;
-                }
-                if (type.flags & 4096 /* Reference */) {
-                    return createTypeReference(type.target, instantiateList(type.typeArguments, mapper, instantiateType));
-                }
-                if (type.flags & 8192 /* Tuple */) {
-                    return createTupleType(instantiateList(type.elementTypes, mapper, instantiateType));
-                }
-                if (type.flags & 16384 /* Union */) {
-                    return getUnionType(instantiateList(type.types, mapper, instantiateType), /*noSubtypeReduction*/ true);
-                }
-                if (type.flags & 32768 /* Intersection */) {
-                    return getIntersectionType(instantiateList(type.types, mapper, instantiateType));
-                }
-            }
-            return type;
-        }
-        function instantiateIndexInfo(info, mapper) {
-            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
-        }
-        // Returns true if the given expression contains (at any level of nesting) a function or arrow expression
-        // that is subject to contextual typing.
-        function isContextSensitive(node) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            switch (node.kind) {
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 171 /* ObjectLiteralExpression */:
-                    return ts.forEach(node.properties, isContextSensitive);
-                case 170 /* ArrayLiteralExpression */:
-                    return ts.forEach(node.elements, isContextSensitive);
-                case 188 /* ConditionalExpression */:
-                    return isContextSensitive(node.whenTrue) ||
-                        isContextSensitive(node.whenFalse);
-                case 187 /* BinaryExpression */:
-                    return node.operatorToken.kind === 52 /* BarBarToken */ &&
-                        (isContextSensitive(node.left) || isContextSensitive(node.right));
-                case 253 /* PropertyAssignment */:
-                    return isContextSensitive(node.initializer);
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 178 /* ParenthesizedExpression */:
-                    return isContextSensitive(node.expression);
-            }
-            return false;
-        }
-        function isContextSensitiveFunctionLikeDeclaration(node) {
-            var areAllParametersUntyped = !ts.forEach(node.parameters, function (p) { return p.type; });
-            var isNullaryArrow = node.kind === 180 /* ArrowFunction */ && !node.parameters.length;
-            return !node.typeParameters && areAllParametersUntyped && !isNullaryArrow;
-        }
-        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
-            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
-        }
-        function getTypeWithoutSignatures(type) {
-            if (type.flags & 80896 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.constructSignatures.length) {
-                    var result = createObjectType(65536 /* Anonymous */, type.symbol);
-                    result.members = resolved.members;
-                    result.properties = resolved.properties;
-                    result.callSignatures = emptyArray;
-                    result.constructSignatures = emptyArray;
-                    type = result;
-                }
-            }
-            return type;
-        }
-        // TYPE CHECKING
-        function isTypeIdenticalTo(source, target) {
-            return checkTypeRelatedTo(source, target, identityRelation, /*errorNode*/ undefined);
-        }
-        function compareTypesIdentical(source, target) {
-            return checkTypeRelatedTo(source, target, identityRelation, /*errorNode*/ undefined) ? -1 /* True */ : 0 /* False */;
-        }
-        function compareTypesAssignable(source, target) {
-            return checkTypeRelatedTo(source, target, assignableRelation, /*errorNode*/ undefined) ? -1 /* True */ : 0 /* False */;
-        }
-        function isTypeSubtypeOf(source, target) {
-            return checkTypeSubtypeOf(source, target, /*errorNode*/ undefined);
-        }
-        function isTypeAssignableTo(source, target) {
-            return checkTypeAssignableTo(source, target, /*errorNode*/ undefined);
-        }
-        /**
-         * This is *not* a bi-directional relationship.
-         * If one needs to check both directions for comparability, use a second call to this function or 'checkTypeComparableTo'.
-         */
-        function isTypeComparableTo(source, target) {
-            return checkTypeComparableTo(source, target, /*errorNode*/ undefined);
-        }
-        function checkTypeSubtypeOf(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
-        }
-        /**
-         * This is *not* a bi-directional relationship.
-         * If one needs to check both directions for comparability, use a second call to this function or 'isTypeComparableTo'.
-         */
-        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
-            return compareSignaturesRelated(source, target, ignoreReturnTypes, /*reportErrors*/ false, /*errorReporter*/ undefined, compareTypesAssignable) !== 0 /* False */;
-        }
-        /**
-         * See signatureRelatedTo, compareSignaturesIdentical
-         */
-        function compareSignaturesRelated(source, target, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
-            // TODO (drosen): De-duplicate code between related functions.
-            if (source === target) {
-                return -1 /* True */;
-            }
-            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
-                return 0 /* False */;
-            }
-            // Spec 1.0 Section 3.8.3 & 3.8.4:
-            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1 /* True */;
-            if (source.thisType && target.thisType && source.thisType !== voidType) {
-                // void sources are assignable to anything.
-                var related = compareTypes(source.thisType, target.thisType, /*reportErrors*/ false)
-                    || compareTypes(target.thisType, source.thisType, reportErrors);
-                if (!related) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
-                    }
-                    return 0 /* False */;
-                }
-                result &= related;
-            }
-            var sourceMax = getNumNonRestParameters(source);
-            var targetMax = getNumNonRestParameters(target);
-            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
-            var sourceParams = source.parameters;
-            var targetParams = target.parameters;
-            for (var i = 0; i < checkCount; i++) {
-                var s = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
-                var t = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
-                var related = compareTypes(s, t, /*reportErrors*/ false) || compareTypes(t, s, reportErrors);
-                if (!related) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
-                    }
-                    return 0 /* False */;
-                }
-                result &= related;
-            }
-            if (!ignoreReturnTypes) {
-                var targetReturnType = getReturnTypeOfSignature(target);
-                if (targetReturnType === voidType) {
-                    return result;
-                }
-                var sourceReturnType = getReturnTypeOfSignature(source);
-                // The following block preserves behavior forbidding boolean returning functions from being assignable to type guard returning functions
-                if (target.typePredicate) {
-                    if (source.typePredicate) {
-                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
-                    }
-                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
-                        if (reportErrors) {
-                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
-                        }
-                        return 0 /* False */;
-                    }
-                }
-                else {
-                    result &= compareTypes(sourceReturnType, targetReturnType, reportErrors);
-                }
-            }
-            return result;
-        }
-        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
-            if (source.kind !== target.kind) {
-                if (reportErrors) {
-                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
-                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-                }
-                return 0 /* False */;
-            }
-            if (source.kind === 1 /* Identifier */) {
-                var sourceIdentifierPredicate = source;
-                var targetIdentifierPredicate = target;
-                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
-                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-                    }
-                    return 0 /* False */;
-                }
-            }
-            var related = compareTypes(source.type, target.type, reportErrors);
-            if (related === 0 /* False */ && reportErrors) {
-                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-            }
-            return related;
-        }
-        function isImplementationCompatibleWithOverload(implementation, overload) {
-            var erasedSource = getErasedSignature(implementation);
-            var erasedTarget = getErasedSignature(overload);
-            // First see if the return types are compatible in either direction.
-            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
-            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
-            if (targetReturnType === voidType
-                || checkTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation, /*errorNode*/ undefined)
-                || checkTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation, /*errorNode*/ undefined)) {
-                return isSignatureAssignableTo(erasedSource, erasedTarget, /*ignoreReturnTypes*/ true);
-            }
-            return false;
-        }
-        function getNumNonRestParameters(signature) {
-            var numParams = signature.parameters.length;
-            return signature.hasRestParameter ?
-                numParams - 1 :
-                numParams;
-        }
-        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
-            if (source.hasRestParameter === target.hasRestParameter) {
-                if (source.hasRestParameter) {
-                    // If both have rest parameters, get the max and add 1 to
-                    // compensate for the rest parameter.
-                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
-                }
-                else {
-                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
-                }
-            }
-            else {
-                // Return the count for whichever signature doesn't have rest parameters.
-                return source.hasRestParameter ?
-                    targetNonRestParamCount :
-                    sourceNonRestParamCount;
-            }
-        }
-        /**
-         * Checks if 'source' is related to 'target' (e.g.: is a assignable to).
-         * @param source The left-hand-side of the relation.
-         * @param target The right-hand-side of the relation.
-         * @param relation The relation considered. One of 'identityRelation', 'subtypeRelation', 'assignableRelation', or 'comparableRelation'.
-         * Used as both to determine which checks are performed and as a cache of previously computed results.
-         * @param errorNode The suggested node upon which all errors will be reported, if defined. This may or may not be the actual node used.
-         * @param headMessage If the error chain should be prepended by a head message, then headMessage will be used.
-         * @param containingMessageChain A chain of errors to prepend any new errors found.
-         */
-        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
-            var errorInfo;
-            var sourceStack;
-            var targetStack;
-            var maybeStack;
-            var expandingFlags;
-            var depth = 0;
-            var overflow = false;
-            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
-            var result = isRelatedTo(source, target, /*reportErrors*/ !!errorNode, headMessage);
-            if (overflow) {
-                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
-            }
-            else if (errorInfo) {
-                if (containingMessageChain) {
-                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
-                }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
-            }
-            return result !== 0 /* False */;
-            function reportError(message, arg0, arg1, arg2) {
-                ts.Debug.assert(!!errorNode);
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
-            }
-            function reportRelationError(message, source, target) {
-                var sourceType = typeToString(source);
-                var targetType = typeToString(target);
-                if (sourceType === targetType) {
-                    sourceType = typeToString(source, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */);
-                    targetType = typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */);
-                }
-                if (!message) {
-                    message = relation === comparableRelation ?
-                        ts.Diagnostics.Type_0_is_not_comparable_to_type_1 :
-                        ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
-                }
-                reportError(message, sourceType, targetType);
-            }
-            // Compare two types and return
-            // Ternary.True if they are related with no assumptions,
-            // Ternary.Maybe if they are related with assumptions of other relationships, or
-            // Ternary.False if they are not related.
-            function isRelatedTo(source, target, reportErrors, headMessage) {
-                var result;
-                // both types are the same - covers 'they are the same primitive type or both are Any' or the same type parameter cases
-                if (source === target)
-                    return -1 /* True */;
-                if (relation === identityRelation) {
-                    return isIdenticalTo(source, target);
-                }
-                if (!(target.flags & 134217728 /* Never */)) {
-                    if (target.flags & 1 /* Any */ || source.flags & 134217728 /* Never */)
-                        return -1 /* True */;
-                    if (source.flags & 32 /* Undefined */) {
-                        if (!strictNullChecks || target.flags & (32 /* Undefined */ | 16 /* Void */) || source === emptyArrayElementType)
-                            return -1 /* True */;
-                    }
-                    if (source.flags & 64 /* Null */) {
-                        if (!strictNullChecks || target.flags & 64 /* Null */)
-                            return -1 /* True */;
-                    }
-                    if (source.flags & 128 /* Enum */ && target === numberType)
-                        return -1 /* True */;
-                    if (source.flags & 128 /* Enum */ && target.flags & 128 /* Enum */) {
-                        if (result = enumRelatedTo(source, target, reportErrors)) {
-                            return result;
-                        }
-                    }
-                    if (source.flags & 256 /* StringLiteral */ && target === stringType)
-                        return -1 /* True */;
-                    if (relation === assignableRelation || relation === comparableRelation) {
-                        if (source.flags & 1 /* Any */)
-                            return -1 /* True */;
-                        if (source === numberType && target.flags & 128 /* Enum */)
-                            return -1 /* True */;
-                    }
-                    if (source.flags & 8 /* Boolean */ && target.flags & 8 /* Boolean */) {
-                        return -1 /* True */;
-                    }
-                }
-                if (source.flags & 1048576 /* FreshObjectLiteral */) {
-                    if (hasExcessProperties(source, target, reportErrors)) {
-                        if (reportErrors) {
-                            reportRelationError(headMessage, source, target);
-                        }
-                        return 0 /* False */;
-                    }
-                    // Above we check for excess properties with respect to the entire target type. When union
-                    // and intersection types are further deconstructed on the target side, we don't want to
-                    // make the check again (as it might fail for a partial target type). Therefore we obtain
-                    // the regular source type and proceed with that.
-                    if (target.flags & 49152 /* UnionOrIntersection */) {
-                        source = getRegularTypeOfObjectLiteral(source);
-                    }
-                }
-                var saveErrorInfo = errorInfo;
-                // Note that these checks are specifically ordered to produce correct results.
-                if (source.flags & 16384 /* Union */) {
-                    if (relation === comparableRelation) {
-                        result = someTypeRelatedToType(source, target, reportErrors);
-                    }
-                    else {
-                        result = eachTypeRelatedToType(source, target, reportErrors);
-                    }
-                    if (result) {
-                        return result;
-                    }
-                }
-                else if (target.flags & 32768 /* Intersection */) {
-                    result = typeRelatedToEachType(source, target, reportErrors);
-                    if (result) {
-                        return result;
-                    }
-                }
-                else {
-                    // It is necessary to try these "some" checks on both sides because there may be nested "each" checks
-                    // on either side that need to be prioritized. For example, A | B = (A | B) & (C | D) or
-                    // A & B = (A & B) | (C & D).
-                    if (source.flags & 32768 /* Intersection */) {
-                        // Check to see if any constituents of the intersection are immediately related to the target.
-                        //
-                        // Don't report errors though. Checking whether a constituent is related to the source is not actually
-                        // useful and leads to some confusing error messages. Instead it is better to let the below checks
-                        // take care of this, or to not elaborate at all. For instance,
-                        //
-                        //    - For an object type (such as 'C = A & B'), users are usually more interested in structural errors.
-                        //
-                        //    - For a union type (such as '(A | B) = (C & D)'), it's better to hold onto the whole intersection
-                        //          than to report that 'D' is not assignable to 'A' or 'B'.
-                        //
-                        //    - For a primitive type or type parameter (such as 'number = A & B') there is no point in
-                        //          breaking the intersection apart.
-                        if (result = someTypeRelatedToType(source, target, /*reportErrors*/ false)) {
-                            return result;
-                        }
-                    }
-                    if (target.flags & 16384 /* Union */) {
-                        if (result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 16777726 /* Primitive */))) {
-                            return result;
-                        }
-                    }
-                }
-                if (source.flags & 512 /* TypeParameter */) {
-                    var constraint = getConstraintOfTypeParameter(source);
-                    if (!constraint || constraint.flags & 1 /* Any */) {
-                        constraint = emptyObjectType;
-                    }
-                    // The constraint may need to be further instantiated with its 'this' type.
-                    constraint = getTypeWithThisArgument(constraint, source);
-                    // Report constraint errors only if the constraint is not the empty object type
-                    var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
-                    if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
-                        errorInfo = saveErrorInfo;
-                        return result;
-                    }
-                }
-                else {
-                    if (source.flags & 4096 /* Reference */ && target.flags & 4096 /* Reference */ && source.target === target.target) {
-                        // We have type references to same target type, see if relationship holds for all type arguments
-                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
-                            return result;
-                        }
-                    }
-                    // Even if relationship doesn't hold for unions, intersections, or generic type references,
-                    // it may hold in a structural comparison.
-                    var apparentSource = getApparentType(source);
-                    // In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
-                    // to X. Failing both of those we want to check if the aggregation of A and B's members structurally
-                    // relates to X. Thus, we include intersection types on the source side here.
-                    if (apparentSource.flags & (80896 /* ObjectType */ | 32768 /* Intersection */) && target.flags & 80896 /* ObjectType */) {
-                        // Report structural errors only if we haven't reported any errors yet
-                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !(source.flags & 16777726 /* Primitive */);
-                        if (result = objectTypeRelatedTo(apparentSource, source, target, reportStructuralErrors)) {
-                            errorInfo = saveErrorInfo;
-                            return result;
-                        }
-                    }
-                }
-                if (reportErrors) {
-                    reportRelationError(headMessage, source, target);
-                }
-                return 0 /* False */;
-            }
-            function isIdenticalTo(source, target) {
-                var result;
-                if (source.flags & 80896 /* ObjectType */ && target.flags & 80896 /* ObjectType */) {
-                    if (source.flags & 4096 /* Reference */ && target.flags & 4096 /* Reference */ && source.target === target.target) {
-                        // We have type references to same target type, see if all type arguments are identical
-                        if (result = typeArgumentsRelatedTo(source, target, /*reportErrors*/ false)) {
-                            return result;
-                        }
-                    }
-                    return objectTypeRelatedTo(source, source, target, /*reportErrors*/ false);
-                }
-                if (source.flags & 16384 /* Union */ && target.flags & 16384 /* Union */ ||
-                    source.flags & 32768 /* Intersection */ && target.flags & 32768 /* Intersection */) {
-                    if (result = eachTypeRelatedToSomeType(source, target, /*reportErrors*/ false)) {
-                        if (result &= eachTypeRelatedToSomeType(target, source, /*reportErrors*/ false)) {
-                            return result;
-                        }
-                    }
-                }
-                return 0 /* False */;
-            }
-            // Check if a property with the given name is known anywhere in the given type. In an object type, a property
-            // is considered known if the object type is empty and the check is for assignability, if the object type has
-            // index signatures, or if the property is actually declared in the object type. In a union or intersection
-            // type, a property is considered known if it is known in any constituent type.
-            function isKnownProperty(type, name) {
-                if (type.flags & 80896 /* ObjectType */) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if ((relation === assignableRelation || relation === comparableRelation) &&
-                        (type === globalObjectType || isEmptyObjectType(resolved)) ||
-                        resolved.stringIndexInfo || resolved.numberIndexInfo || getPropertyOfType(type, name)) {
-                        return true;
-                    }
-                }
-                else if (type.flags & 49152 /* UnionOrIntersection */) {
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (isKnownProperty(t, name)) {
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
-            function isEmptyObjectType(t) {
-                return t.properties.length === 0 &&
-                    t.callSignatures.length === 0 &&
-                    t.constructSignatures.length === 0 &&
-                    !t.stringIndexInfo &&
-                    !t.numberIndexInfo;
-            }
-            function hasExcessProperties(source, target, reportErrors) {
-                if (!(target.flags & 67108864 /* ObjectLiteralPatternWithComputedProperties */) && maybeTypeOfKind(target, 80896 /* ObjectType */)) {
-                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                        var prop = _a[_i];
-                        if (!isKnownProperty(target, prop.name)) {
-                            if (reportErrors) {
-                                // We know *exactly* where things went wrong when comparing the types.
-                                // Use this property as the error node as this will be more helpful in
-                                // reasoning about what went wrong.
-                                ts.Debug.assert(!!errorNode);
-                                errorNode = prop.valueDeclaration;
-                                reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
-                            }
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
-            function eachTypeRelatedToSomeType(source, target, reportErrors) {
-                var result = -1 /* True */;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
-                    var sourceType = sourceTypes_1[_i];
-                    var related = typeRelatedToSomeType(sourceType, target, /*reportErrors*/ false);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function typeRelatedToSomeType(source, target, reportErrors) {
-                var targetTypes = target.types;
-                var len = targetTypes.length;
-                // The null and undefined types are guaranteed to be at the end of the constituent type list. In order
-                // to produce the best possible errors we first check the nullable types, such that the last type we
-                // check and report errors from is a non-nullable type if one is present.
-                while (len >= 2 && targetTypes[len - 1].flags & 96 /* Nullable */) {
-                    var related = isRelatedTo(source, targetTypes[len - 1], /*reportErrors*/ false);
-                    if (related) {
-                        return related;
-                    }
-                    len--;
-                }
-                // Now check the non-nullable types and report errors on the last one.
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(source, targetTypes[i], reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
-                    }
-                }
-                return 0 /* False */;
-            }
-            function typeRelatedToEachType(source, target, reportErrors) {
-                var result = -1 /* True */;
-                var targetTypes = target.types;
-                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
-                    var targetType = targetTypes_1[_i];
-                    var related = isRelatedTo(source, targetType, reportErrors);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function someTypeRelatedToType(source, target, reportErrors) {
-                var sourceTypes = source.types;
-                var len = sourceTypes.length;
-                // The null and undefined types are guaranteed to be at the end of the constituent type list. In order
-                // to produce the best possible errors we first check the nullable types, such that the last type we
-                // check and report errors from is a non-nullable type if one is present.
-                while (len >= 2 && sourceTypes[len - 1].flags & 96 /* Nullable */) {
-                    var related = isRelatedTo(sourceTypes[len - 1], target, /*reportErrors*/ false);
-                    if (related) {
-                        return related;
-                    }
-                    len--;
-                }
-                // Now check the non-nullable types and report errors on the last one.
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
-                    }
-                }
-                return 0 /* False */;
-            }
-            function eachTypeRelatedToType(source, target, reportErrors) {
-                var result = -1 /* True */;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
-                    var sourceType = sourceTypes_2[_i];
-                    var related = isRelatedTo(sourceType, target, reportErrors);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function typeArgumentsRelatedTo(source, target, reportErrors) {
-                var sources = source.typeArguments || emptyArray;
-                var targets = target.typeArguments || emptyArray;
-                if (sources.length !== targets.length && relation === identityRelation) {
-                    return 0 /* False */;
-                }
-                var length = sources.length <= targets.length ? sources.length : targets.length;
-                var result = -1 /* True */;
-                for (var i = 0; i < length; i++) {
-                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            // Determine if two object types are related by structure. First, check if the result is already available in the global cache.
-            // Second, check if we have already started a comparison of the given two types in which case we assume the result to be true.
-            // Third, check if both types are part of deeply nested chains of generic type instantiations and if so assume the types are
-            // equal and infinitely expanding. Fourth, if we have reached a depth of 100 nested comparisons, assume we have runaway recursion
-            // and issue an error. Otherwise, actually compare the structure of the two types.
-            function objectTypeRelatedTo(source, originalSource, target, reportErrors) {
-                if (overflow) {
-                    return 0 /* False */;
-                }
-                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
-                var related = relation[id];
-                if (related !== undefined) {
-                    if (reportErrors && related === 2 /* Failed */) {
-                        // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported
-                        // failure and continue computing the relation such that errors get reported.
-                        relation[id] = 3 /* FailedAndReported */;
-                    }
-                    else {
-                        return related === 1 /* Succeeded */ ? -1 /* True */ : 0 /* False */;
-                    }
-                }
-                if (depth > 0) {
-                    for (var i = 0; i < depth; i++) {
-                        // If source and target are already being compared, consider them related with assumptions
-                        if (maybeStack[i][id]) {
-                            return 1 /* Maybe */;
-                        }
-                    }
-                    if (depth === 100) {
-                        overflow = true;
-                        return 0 /* False */;
-                    }
-                }
-                else {
-                    sourceStack = [];
-                    targetStack = [];
-                    maybeStack = [];
-                    expandingFlags = 0;
-                }
-                sourceStack[depth] = source;
-                targetStack[depth] = target;
-                maybeStack[depth] = {};
-                maybeStack[depth][id] = 1 /* Succeeded */;
-                depth++;
-                var saveExpandingFlags = expandingFlags;
-                if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth))
-                    expandingFlags |= 1;
-                if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth))
-                    expandingFlags |= 2;
-                var result;
-                if (expandingFlags === 3) {
-                    result = 1 /* Maybe */;
-                }
-                else {
-                    result = propertiesRelatedTo(source, target, reportErrors);
-                    if (result) {
-                        result &= signaturesRelatedTo(source, target, 0 /* Call */, reportErrors);
-                        if (result) {
-                            result &= signaturesRelatedTo(source, target, 1 /* Construct */, reportErrors);
-                            if (result) {
-                                result &= indexTypesRelatedTo(source, originalSource, target, 0 /* String */, reportErrors);
-                                if (result) {
-                                    result &= indexTypesRelatedTo(source, originalSource, target, 1 /* Number */, reportErrors);
-                                }
-                            }
-                        }
-                    }
-                }
-                expandingFlags = saveExpandingFlags;
-                depth--;
-                if (result) {
-                    var maybeCache = maybeStack[depth];
-                    // If result is definitely true, copy assumptions to global cache, else copy to next level up
-                    var destinationCache = (result === -1 /* True */ || depth === 0) ? relation : maybeStack[depth - 1];
-                    ts.copyMap(maybeCache, destinationCache);
-                }
-                else {
-                    // A false result goes straight into global cache (when something is false under assumptions it
-                    // will also be false without assumptions)
-                    relation[id] = reportErrors ? 3 /* FailedAndReported */ : 2 /* Failed */;
-                }
-                return result;
-            }
-            function propertiesRelatedTo(source, target, reportErrors) {
-                if (relation === identityRelation) {
-                    return propertiesIdenticalTo(source, target);
-                }
-                var result = -1 /* True */;
-                var properties = getPropertiesOfObjectType(target);
-                var requireOptionalProperties = relation === subtypeRelation && !(source.flags & 524288 /* ObjectLiteral */);
-                for (var _i = 0, properties_1 = properties; _i < properties_1.length; _i++) {
-                    var targetProp = properties_1[_i];
-                    var sourceProp = getPropertyOfType(source, targetProp.name);
-                    if (sourceProp !== targetProp) {
-                        if (!sourceProp) {
-                            if (!(targetProp.flags & 536870912 /* Optional */) || requireOptionalProperties) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
-                                }
-                                return 0 /* False */;
-                            }
-                        }
-                        else if (!(targetProp.flags & 134217728 /* Prototype */)) {
-                            var sourcePropFlags = getDeclarationFlagsFromSymbol(sourceProp);
-                            var targetPropFlags = getDeclarationFlagsFromSymbol(targetProp);
-                            if (sourcePropFlags & 8 /* Private */ || targetPropFlags & 8 /* Private */) {
-                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
-                                    if (reportErrors) {
-                                        if (sourcePropFlags & 8 /* Private */ && targetPropFlags & 8 /* Private */) {
-                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
-                                        }
-                                        else {
-                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 /* Private */ ? source : target), typeToString(sourcePropFlags & 8 /* Private */ ? target : source));
-                                        }
-                                    }
-                                    return 0 /* False */;
-                                }
-                            }
-                            else if (targetPropFlags & 16 /* Protected */) {
-                                var sourceDeclaredInClass = sourceProp.parent && sourceProp.parent.flags & 32 /* Class */;
-                                var sourceClass = sourceDeclaredInClass ? getDeclaredTypeOfSymbol(getParentOfSymbol(sourceProp)) : undefined;
-                                var targetClass = getDeclaredTypeOfSymbol(getParentOfSymbol(targetProp));
-                                if (!sourceClass || !hasBaseType(sourceClass, targetClass)) {
-                                    if (reportErrors) {
-                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(sourceClass || source), typeToString(targetClass));
-                                    }
-                                    return 0 /* False */;
-                                }
-                            }
-                            else if (sourcePropFlags & 16 /* Protected */) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0 /* False */;
-                            }
-                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
-                            if (!related) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
-                                }
-                                return 0 /* False */;
-                            }
-                            result &= related;
-                            if (sourceProp.flags & 536870912 /* Optional */ && !(targetProp.flags & 536870912 /* Optional */)) {
-                                // TypeScript 1.0 spec (April 2014): 3.8.3
-                                // S is a subtype of a type T, and T is a supertype of S if ...
-                                // S' and T are object types and, for each member M in T..
-                                // M is a property and S' contains a property N where
-                                // if M is a required property, N is also a required property
-                                // (M - property in T)
-                                // (N - property in S)
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0 /* False */;
-                            }
-                        }
-                    }
-                }
-                return result;
-            }
-            function propertiesIdenticalTo(source, target) {
-                if (!(source.flags & 80896 /* ObjectType */ && target.flags & 80896 /* ObjectType */)) {
-                    return 0 /* False */;
-                }
-                var sourceProperties = getPropertiesOfObjectType(source);
-                var targetProperties = getPropertiesOfObjectType(target);
-                if (sourceProperties.length !== targetProperties.length) {
-                    return 0 /* False */;
-                }
-                var result = -1 /* True */;
-                for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
-                    var sourceProp = sourceProperties_1[_i];
-                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
-                    if (!targetProp) {
-                        return 0 /* False */;
-                    }
-                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function signaturesRelatedTo(source, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return signaturesIdenticalTo(source, target, kind);
-                }
-                if (target === anyFunctionType || source === anyFunctionType) {
-                    return -1 /* True */;
-                }
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (kind === 1 /* Construct */ && sourceSignatures.length && targetSignatures.length) {
-                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
-                        // An abstract constructor type is not assignable to a non-abstract constructor type
-                        // as it would otherwise be possible to new an abstract class. Note that the assignability
-                        // check we perform for an extends clause excludes construct signatures from the target,
-                        // so this check never proceeds.
-                        if (reportErrors) {
-                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
-                        }
-                        return 0 /* False */;
-                    }
-                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
-                        return 0 /* False */;
-                    }
-                }
-                var result = -1 /* True */;
-                var saveErrorInfo = errorInfo;
-                outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
-                    var t = targetSignatures_1[_i];
-                    // Only elaborate errors from the first failure
-                    var shouldElaborateErrors = reportErrors;
-                    for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
-                        var s = sourceSignatures_1[_a];
-                        var related = signatureRelatedTo(s, t, shouldElaborateErrors);
-                        if (related) {
-                            result &= related;
-                            errorInfo = saveErrorInfo;
-                            continue outer;
-                        }
-                        shouldElaborateErrors = false;
-                    }
-                    if (shouldElaborateErrors) {
-                        reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, /*enclosingDeclaration*/ undefined, /*flags*/ undefined, kind));
-                    }
-                    return 0 /* False */;
-                }
-                return result;
-            }
-            /**
-             * See signatureAssignableTo, compareSignaturesIdentical
-             */
-            function signatureRelatedTo(source, target, reportErrors) {
-                return compareSignaturesRelated(source, target, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo);
-            }
-            function signaturesIdenticalTo(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (sourceSignatures.length !== targetSignatures.length) {
-                    return 0 /* False */;
-                }
-                var result = -1 /* True */;
-                for (var i = 0, len = sourceSignatures.length; i < len; i++) {
-                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false, isRelatedTo);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
-                var result = -1 /* True */;
-                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
-                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
-                        if (!related) {
-                            if (reportErrors) {
-                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
-                            }
-                            return 0 /* False */;
-                        }
-                        result &= related;
-                    }
-                }
-                return result;
-            }
-            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
-                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
-                if (!related && reportErrors) {
-                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
-                }
-                return related;
-            }
-            function indexTypesRelatedTo(source, originalSource, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return indexTypesIdenticalTo(source, target, kind);
-                }
-                var targetInfo = getIndexInfoOfType(target, kind);
-                if (!targetInfo || ((targetInfo.type.flags & 1 /* Any */) && !(originalSource.flags & 16777726 /* Primitive */))) {
-                    // Index signature of type any permits assignment from everything but primitives
-                    return -1 /* True */;
-                }
-                var sourceInfo = getIndexInfoOfType(source, kind) ||
-                    kind === 1 /* Number */ && getIndexInfoOfType(source, 0 /* String */);
-                if (sourceInfo) {
-                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
-                }
-                if (isObjectLiteralType(source)) {
-                    var related = -1 /* True */;
-                    if (kind === 0 /* String */) {
-                        var sourceNumberInfo = getIndexInfoOfType(source, 1 /* Number */);
-                        if (sourceNumberInfo) {
-                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
-                        }
-                    }
-                    if (related) {
-                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
-                    }
-                    return related;
-                }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
-                }
-                return 0 /* False */;
-            }
-            function indexTypesIdenticalTo(source, target, indexKind) {
-                var targetInfo = getIndexInfoOfType(target, indexKind);
-                var sourceInfo = getIndexInfoOfType(source, indexKind);
-                if (!sourceInfo && !targetInfo) {
-                    return -1 /* True */;
-                }
-                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
-                    return isRelatedTo(sourceInfo.type, targetInfo.type);
-                }
-                return 0 /* False */;
-            }
-            function enumRelatedTo(source, target, reportErrors) {
-                if (source.symbol.name !== target.symbol.name ||
-                    source.symbol.flags & 128 /* ConstEnum */ ||
-                    target.symbol.flags & 128 /* ConstEnum */) {
-                    return 0 /* False */;
-                }
-                var targetEnumType = getTypeOfSymbol(target.symbol);
-                for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
-                    var property = _a[_i];
-                    if (property.flags & 8 /* EnumMember */) {
-                        var targetProperty = getPropertyOfType(targetEnumType, property.name);
-                        if (!targetProperty || !(targetProperty.flags & 8 /* EnumMember */)) {
-                            if (reportErrors) {
-                                reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */));
-                            }
-                            return 0 /* False */;
-                        }
-                    }
-                }
-                return -1 /* True */;
-            }
-            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
-                if (!sourceSignature.declaration || !targetSignature.declaration) {
-                    return true;
-                }
-                var sourceAccessibility = sourceSignature.declaration.flags & (8 /* Private */ | 16 /* Protected */);
-                var targetAccessibility = targetSignature.declaration.flags & (8 /* Private */ | 16 /* Protected */);
-                // A public, protected and private signature is assignable to a private signature.
-                if (targetAccessibility === 8 /* Private */) {
-                    return true;
-                }
-                // A public and protected signature is assignable to a protected signature.
-                if (targetAccessibility === 16 /* Protected */ && sourceAccessibility !== 8 /* Private */) {
-                    return true;
-                }
-                // Only a public signature is assignable to public signature.
-                if (targetAccessibility !== 16 /* Protected */ && !sourceAccessibility) {
-                    return true;
-                }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
-                }
-                return false;
-            }
-        }
-        // Return true if the given type is the constructor type for an abstract class
-        function isAbstractConstructorType(type) {
-            if (type.flags & 65536 /* Anonymous */) {
-                var symbol = type.symbol;
-                if (symbol && symbol.flags & 32 /* Class */) {
-                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
-                    if (declaration && declaration.flags & 128 /* Abstract */) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        // Return true if the given type is part of a deeply nested chain of generic instantiations. We consider this to be the case
-        // when structural type comparisons have been started for 10 or more instantiations of the same generic type. It is possible,
-        // though highly unlikely, for this test to be true in a situation where a chain of instantiations is not infinitely expanding.
-        // Effectively, we will generate a false positive when two types are structurally equal to at least 10 levels, but unequal at
-        // some level beyond that.
-        function isDeeplyNestedGeneric(type, stack, depth) {
-            // We track type references (created by createTypeReference) and instantiated types (created by instantiateType)
-            if (type.flags & (4096 /* Reference */ | 131072 /* Instantiated */) && depth >= 5) {
-                var symbol = type.symbol;
-                var count = 0;
-                for (var i = 0; i < depth; i++) {
-                    var t = stack[i];
-                    if (t.flags & (4096 /* Reference */ | 131072 /* Instantiated */) && t.symbol === symbol) {
-                        count++;
-                        if (count >= 5)
-                            return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isPropertyIdenticalTo(sourceProp, targetProp) {
-            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0 /* False */;
-        }
-        function compareProperties(sourceProp, targetProp, compareTypes) {
-            // Two members are considered identical when
-            // - they are public properties with identical names, optionality, and types,
-            // - they are private or protected properties originating in the same declaration and having identical types
-            if (sourceProp === targetProp) {
-                return -1 /* True */;
-            }
-            var sourcePropAccessibility = getDeclarationFlagsFromSymbol(sourceProp) & (8 /* Private */ | 16 /* Protected */);
-            var targetPropAccessibility = getDeclarationFlagsFromSymbol(targetProp) & (8 /* Private */ | 16 /* Protected */);
-            if (sourcePropAccessibility !== targetPropAccessibility) {
-                return 0 /* False */;
-            }
-            if (sourcePropAccessibility) {
-                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
-                    return 0 /* False */;
-                }
-            }
-            else {
-                if ((sourceProp.flags & 536870912 /* Optional */) !== (targetProp.flags & 536870912 /* Optional */)) {
-                    return 0 /* False */;
-                }
-            }
-            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
-                return 0 /* False */;
-            }
-            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
-        }
-        function isMatchingSignature(source, target, partialMatch) {
-            // A source signature matches a target signature if the two signatures have the same number of required,
-            // optional, and rest parameters.
-            if (source.parameters.length === target.parameters.length &&
-                source.minArgumentCount === target.minArgumentCount &&
-                source.hasRestParameter === target.hasRestParameter) {
-                return true;
-            }
-            // A source signature partially matches a target signature if the target signature has no fewer required
-            // parameters and no more overall parameters than the source signature (where a signature with a rest
-            // parameter is always considered to have more overall parameters than one without).
-            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (source.hasRestParameter && !target.hasRestParameter ||
-                source.hasRestParameter === target.hasRestParameter && source.parameters.length >= target.parameters.length)) {
-                return true;
-            }
-            return false;
-        }
-        /**
-         * See signatureRelatedTo, compareSignaturesIdentical
-         */
-        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
-            // TODO (drosen): De-duplicate code between related functions.
-            if (source === target) {
-                return -1 /* True */;
-            }
-            if (!(isMatchingSignature(source, target, partialMatch))) {
-                return 0 /* False */;
-            }
-            // Check that the two signatures have the same number of type parameters. We might consider
-            // also checking that any type parameter constraints match, but that would require instantiating
-            // the constraints with a common set of type arguments to get relatable entities in places where
-            // type parameters occur in the constraints. The complexity of doing that doesn't seem worthwhile,
-            // particularly as we're comparing erased versions of the signatures below.
-            if ((source.typeParameters ? source.typeParameters.length : 0) !== (target.typeParameters ? target.typeParameters.length : 0)) {
-                return 0 /* False */;
-            }
-            // Spec 1.0 Section 3.8.3 & 3.8.4:
-            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1 /* True */;
-            if (!ignoreThisTypes && source.thisType && target.thisType) {
-                var related = compareTypes(source.thisType, target.thisType);
-                if (!related) {
-                    return 0 /* False */;
-                }
-                result &= related;
-            }
-            var targetLen = target.parameters.length;
-            for (var i = 0; i < targetLen; i++) {
-                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
-                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
-                var related = compareTypes(s, t);
-                if (!related) {
-                    return 0 /* False */;
-                }
-                result &= related;
-            }
-            if (!ignoreReturnTypes) {
-                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
-            }
-            return result;
-        }
-        function isRestParameterIndex(signature, parameterIndex) {
-            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
-        }
-        function isSupertypeOfEach(candidate, types) {
-            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
-                var t = types_5[_i];
-                if (candidate !== t && !isTypeSubtypeOf(t, candidate))
-                    return false;
-            }
-            return true;
-        }
-        function getCombinedFlagsOfTypes(types) {
-            var flags = 0;
-            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
-                var t = types_6[_i];
-                flags |= t.flags;
-            }
-            return flags;
-        }
-        function getCommonSupertype(types) {
-            if (!strictNullChecks) {
-                return ts.forEach(types, function (t) { return isSupertypeOfEach(t, types) ? t : undefined; });
-            }
-            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 96 /* Nullable */); });
-            if (!primaryTypes.length) {
-                return getUnionType(types);
-            }
-            var supertype = ts.forEach(primaryTypes, function (t) { return isSupertypeOfEach(t, primaryTypes) ? t : undefined; });
-            return supertype && addNullableKind(supertype, getCombinedFlagsOfTypes(types) & 96 /* Nullable */);
-        }
-        function reportNoCommonSupertypeError(types, errorLocation, errorMessageChainHead) {
-            // The downfallType/bestSupertypeDownfallType is the first type that caused a particular candidate
-            // to not be the common supertype. So if it weren't for this one downfallType (and possibly others),
-            // the type in question could have been the common supertype.
-            var bestSupertype;
-            var bestSupertypeDownfallType;
-            var bestSupertypeScore = 0;
-            for (var i = 0; i < types.length; i++) {
-                var score = 0;
-                var downfallType = undefined;
-                for (var j = 0; j < types.length; j++) {
-                    if (isTypeSubtypeOf(types[j], types[i])) {
-                        score++;
-                    }
-                    else if (!downfallType) {
-                        downfallType = types[j];
-                    }
-                }
-                ts.Debug.assert(!!downfallType, "If there is no common supertype, each type should have a downfallType");
-                if (score > bestSupertypeScore) {
-                    bestSupertype = types[i];
-                    bestSupertypeDownfallType = downfallType;
-                    bestSupertypeScore = score;
-                }
-                // types.length - 1 is the maximum score, given that getCommonSupertype returned false
-                if (bestSupertypeScore === types.length - 1) {
-                    break;
-                }
-            }
-            // In the following errors, the {1} slot is before the {0} slot because checkTypeSubtypeOf supplies the
-            // subtype as the first argument to the error
-            checkTypeSubtypeOf(bestSupertypeDownfallType, bestSupertype, errorLocation, ts.Diagnostics.Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0, errorMessageChainHead);
-        }
-        function isArrayType(type) {
-            return type.flags & 4096 /* Reference */ && type.target === globalArrayType;
-        }
-        function isArrayLikeType(type) {
-            // A type is array-like if it is a reference to the global Array or global ReadonlyArray type,
-            // or if it is not the undefined or null type and if it is assignable to ReadonlyArray<any>
-            return type.flags & 4096 /* Reference */ && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
-                !(type.flags & 96 /* Nullable */) && isTypeAssignableTo(type, anyReadonlyArrayType);
-        }
-        function isTupleLikeType(type) {
-            return !!getPropertyOfType(type, "0");
-        }
-        function isStringLiteralType(type) {
-            return type.flags & 256 /* StringLiteral */;
-        }
-        /**
-         * Check if a Type was written as a tuple type literal.
-         * Prefer using isTupleLikeType() unless the use of `elementTypes` is required.
-         */
-        function isTupleType(type) {
-            return !!(type.flags & 8192 /* Tuple */);
-        }
-        function getNullableKind(type) {
-            var flags = type.flags;
-            if (flags & 16384 /* Union */) {
-                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    flags |= t.flags;
-                }
-            }
-            return flags & 96 /* Nullable */;
-        }
-        function addNullableKind(type, kind) {
-            if ((getNullableKind(type) & kind) !== kind) {
-                var types = [type];
-                if (kind & 32 /* Undefined */) {
-                    types.push(undefinedType);
-                }
-                if (kind & 64 /* Null */) {
-                    types.push(nullType);
-                }
-                type = getUnionType(types);
-            }
-            return type;
-        }
-        function getNonNullableType(type) {
-            return strictNullChecks ? getTypeWithFacts(type, 524288 /* NEUndefinedOrNull */) : type;
-        }
-        /**
-         * Return true if type was inferred from an object literal or written as an object type literal
-         * with no call or construct signatures.
-         */
-        function isObjectLiteralType(type) {
-            return type.symbol && (type.symbol.flags & (4096 /* ObjectLiteral */ | 2048 /* TypeLiteral */)) !== 0 &&
-                getSignaturesOfType(type, 0 /* Call */).length === 0 &&
-                getSignaturesOfType(type, 1 /* Construct */).length === 0;
-        }
-        function createTransientSymbol(source, type) {
-            var symbol = createSymbol(source.flags | 67108864 /* Transient */, source.name);
-            symbol.declarations = source.declarations;
-            symbol.parent = source.parent;
-            symbol.type = type;
-            symbol.target = source;
-            if (source.valueDeclaration) {
-                symbol.valueDeclaration = source.valueDeclaration;
-            }
-            return symbol;
-        }
-        function transformTypeOfMembers(type, f) {
-            var members = {};
-            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
-                var property = _a[_i];
-                var original = getTypeOfSymbol(property);
-                var updated = f(original);
-                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
-            }
-            ;
-            return members;
-        }
-        /**
-         * If the the provided object literal is subject to the excess properties check,
-         * create a new that is exempt. Recursively mark object literal members as exempt.
-         * Leave signatures alone since they are not subject to the check.
-         */
-        function getRegularTypeOfObjectLiteral(type) {
-            if (!(type.flags & 1048576 /* FreshObjectLiteral */)) {
-                return type;
-            }
-            var regularType = type.regularType;
-            if (regularType) {
-                return regularType;
-            }
-            var resolved = type;
-            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
-            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
-            regularNew.flags = resolved.flags & ~1048576 /* FreshObjectLiteral */;
-            type.regularType = regularNew;
-            return regularNew;
-        }
-        function getWidenedTypeOfObjectLiteral(type) {
-            var members = transformTypeOfMembers(type, function (prop) {
-                var widened = getWidenedType(prop);
-                return prop === widened ? prop : widened;
-            });
-            var stringIndexInfo = getIndexInfoOfType(type, 0 /* String */);
-            var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
-            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
-        }
-        function getWidenedConstituentType(type) {
-            return type.flags & 96 /* Nullable */ ? type : getWidenedType(type);
-        }
-        function getWidenedType(type) {
-            if (type.flags & 6291456 /* RequiresWidening */) {
-                if (type.flags & 96 /* Nullable */) {
-                    return anyType;
-                }
-                if (type.flags & 524288 /* ObjectLiteral */) {
-                    return getWidenedTypeOfObjectLiteral(type);
-                }
-                if (type.flags & 16384 /* Union */) {
-                    return getUnionType(ts.map(type.types, getWidenedConstituentType), /*noSubtypeReduction*/ true);
-                }
-                if (isArrayType(type)) {
-                    return createArrayType(getWidenedType(type.typeArguments[0]));
-                }
-                if (isTupleType(type)) {
-                    return createTupleType(ts.map(type.elementTypes, getWidenedType));
-                }
-            }
-            return type;
-        }
-        /**
-         * Reports implicit any errors that occur as a result of widening 'null' and 'undefined'
-         * to 'any'. A call to reportWideningErrorsInType is normally accompanied by a call to
-         * getWidenedType. But in some cases getWidenedType is called without reporting errors
-         * (type argument inference is an example).
-         *
-         * The return value indicates whether an error was in fact reported. The particular circumstances
-         * are on a best effort basis. Currently, if the null or undefined that causes widening is inside
-         * an object literal property (arbitrarily deeply), this function reports an error. If no error is
-         * reported, reportImplicitAnyError is a suitable fallback to report a general error.
-         */
-        function reportWideningErrorsInType(type) {
-            var errorReported = false;
-            if (type.flags & 16384 /* Union */) {
-                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
-            }
-            if (isArrayType(type)) {
-                return reportWideningErrorsInType(type.typeArguments[0]);
-            }
-            if (isTupleType(type)) {
-                for (var _b = 0, _c = type.elementTypes; _b < _c.length; _b++) {
-                    var t = _c[_b];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
-            }
-            if (type.flags & 524288 /* ObjectLiteral */) {
-                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
-                    var p = _e[_d];
-                    var t = getTypeOfSymbol(p);
-                    if (t.flags & 2097152 /* ContainsUndefinedOrNull */) {
-                        if (!reportWideningErrorsInType(t)) {
-                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
-                        }
-                        errorReported = true;
-                    }
-                }
-            }
-            return errorReported;
-        }
-        function reportImplicitAnyError(declaration, type) {
-            var typeAsString = typeToString(getWidenedType(type));
-            var diagnostic;
-            switch (declaration.kind) {
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
-                    break;
-                case 142 /* Parameter */:
-                    diagnostic = declaration.dotDotDotToken ?
-                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
-                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
-                    break;
-                case 169 /* BindingElement */:
-                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
-                    break;
-                case 220 /* FunctionDeclaration */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    if (!declaration.name) {
-                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
-                        return;
-                    }
-                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
-                    break;
-                default:
-                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
-            }
-            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
-        }
-        function reportErrorsFromWidening(declaration, type) {
-            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & 2097152 /* ContainsUndefinedOrNull */) {
-                // Report implicit any error within type if possible, otherwise report error on declaration
-                if (!reportWideningErrorsInType(type)) {
-                    reportImplicitAnyError(declaration, type);
-                }
-            }
-        }
-        function forEachMatchingParameterType(source, target, callback) {
-            var sourceMax = source.parameters.length;
-            var targetMax = target.parameters.length;
-            var count;
-            if (source.hasRestParameter && target.hasRestParameter) {
-                count = Math.max(sourceMax, targetMax);
-            }
-            else if (source.hasRestParameter) {
-                count = targetMax;
-            }
-            else if (target.hasRestParameter) {
-                count = sourceMax;
-            }
-            else {
-                count = Math.min(sourceMax, targetMax);
-            }
-            for (var i = 0; i < count; i++) {
-                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
-            }
-        }
-        function createInferenceContext(typeParameters, inferUnionTypes) {
-            var inferences = ts.map(typeParameters, createTypeInferencesObject);
-            return {
-                typeParameters: typeParameters,
-                inferUnionTypes: inferUnionTypes,
-                inferences: inferences,
-                inferredTypes: new Array(typeParameters.length)
-            };
-        }
-        function createTypeInferencesObject() {
-            return {
-                primary: undefined,
-                secondary: undefined,
-                isFixed: false
-            };
-        }
-        function inferTypes(context, source, target) {
-            var sourceStack;
-            var targetStack;
-            var depth = 0;
-            var inferiority = 0;
-            var visited = {};
-            inferFromTypes(source, target);
-            function isInProcess(source, target) {
-                for (var i = 0; i < depth; i++) {
-                    if (source === sourceStack[i] && target === targetStack[i]) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function inferFromTypes(source, target) {
-                if (source.flags & 16384 /* Union */ && target.flags & 16384 /* Union */ ||
-                    source.flags & 32768 /* Intersection */ && target.flags & 32768 /* Intersection */) {
-                    // Source and target are both unions or both intersections. First, find each
-                    // target constituent type that has an identically matching source constituent
-                    // type, and for each such target constituent type infer from the type to itself.
-                    // When inferring from a type to itself we effectively find all type parameter
-                    // occurrences within that type and infer themselves as their type arguments.
-                    var matchingTypes = void 0;
-                    for (var _i = 0, _a = target.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (typeIdenticalToSomeType(t, source.types)) {
-                            (matchingTypes || (matchingTypes = [])).push(t);
-                            inferFromTypes(t, t);
-                        }
-                    }
-                    // Next, to improve the quality of inferences, reduce the source and target types by
-                    // removing the identically matched constituents. For example, when inferring from
-                    // 'string | string[]' to 'string | T' we reduce the types to 'string[]' and 'T'.
-                    if (matchingTypes) {
-                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
-                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
-                    }
-                }
-                if (target.flags & 512 /* TypeParameter */) {
-                    // If target is a type parameter, make an inference, unless the source type contains
-                    // the anyFunctionType (the wildcard type that's used to avoid contextually typing functions).
-                    // Because the anyFunctionType is internal, it should not be exposed to the user by adding
-                    // it as an inference candidate. Hopefully, a better candidate will come along that does
-                    // not contain anyFunctionType when we come back to this argument for its second round
-                    // of inference.
-                    if (source.flags & 8388608 /* ContainsAnyFunctionType */) {
-                        return;
-                    }
-                    var typeParameters = context.typeParameters;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (target === typeParameters[i]) {
-                            var inferences = context.inferences[i];
-                            if (!inferences.isFixed) {
-                                // Any inferences that are made to a type parameter in a union type are inferior
-                                // to inferences made to a flat (non-union) type. This is because if we infer to
-                                // T | string[], we really don't know if we should be inferring to T or not (because
-                                // the correct constituent on the target side could be string[]). Therefore, we put
-                                // such inferior inferences into a secondary bucket, and only use them if the primary
-                                // bucket is empty.
-                                var candidates = inferiority ?
-                                    inferences.secondary || (inferences.secondary = []) :
-                                    inferences.primary || (inferences.primary = []);
-                                if (!ts.contains(candidates, source)) {
-                                    candidates.push(source);
-                                }
-                            }
-                            return;
-                        }
-                    }
-                }
-                else if (source.flags & 4096 /* Reference */ && target.flags & 4096 /* Reference */ && source.target === target.target) {
-                    // If source and target are references to the same generic type, infer from type arguments
-                    var sourceTypes = source.typeArguments || emptyArray;
-                    var targetTypes = target.typeArguments || emptyArray;
-                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
-                    for (var i = 0; i < count; i++) {
-                        inferFromTypes(sourceTypes[i], targetTypes[i]);
-                    }
-                }
-                else if (source.flags & 8192 /* Tuple */ && target.flags & 8192 /* Tuple */ && source.elementTypes.length === target.elementTypes.length) {
-                    // If source and target are tuples of the same size, infer from element types
-                    var sourceTypes = source.elementTypes;
-                    var targetTypes = target.elementTypes;
-                    for (var i = 0; i < sourceTypes.length; i++) {
-                        inferFromTypes(sourceTypes[i], targetTypes[i]);
-                    }
-                }
-                else if (target.flags & 49152 /* UnionOrIntersection */) {
-                    var targetTypes = target.types;
-                    var typeParameterCount = 0;
-                    var typeParameter = void 0;
-                    // First infer to each type in union or intersection that isn't a type parameter
-                    for (var _b = 0, targetTypes_2 = targetTypes; _b < targetTypes_2.length; _b++) {
-                        var t = targetTypes_2[_b];
-                        if (t.flags & 512 /* TypeParameter */ && ts.contains(context.typeParameters, t)) {
-                            typeParameter = t;
-                            typeParameterCount++;
-                        }
-                        else {
-                            inferFromTypes(source, t);
-                        }
-                    }
-                    // Next, if target containings a single naked type parameter, make a secondary inference to that type
-                    // parameter. This gives meaningful results for union types in co-variant positions and intersection
-                    // types in contra-variant positions (such as callback parameters).
-                    if (typeParameterCount === 1) {
-                        inferiority++;
-                        inferFromTypes(source, typeParameter);
-                        inferiority--;
-                    }
-                }
-                else if (source.flags & 49152 /* UnionOrIntersection */) {
-                    // Source is a union or intersection type, infer from each constituent type
-                    var sourceTypes = source.types;
-                    for (var _c = 0, sourceTypes_3 = sourceTypes; _c < sourceTypes_3.length; _c++) {
-                        var sourceType = sourceTypes_3[_c];
-                        inferFromTypes(sourceType, target);
-                    }
-                }
-                else {
-                    source = getApparentType(source);
-                    if (source.flags & 80896 /* ObjectType */ && (target.flags & 4096 /* Reference */ && target.typeArguments ||
-                        target.flags & 8192 /* Tuple */ ||
-                        target.flags & 65536 /* Anonymous */ && target.symbol && target.symbol.flags & (8192 /* Method */ | 2048 /* TypeLiteral */ | 32 /* Class */))) {
-                        // If source is an object type, and target is a type reference with type arguments, a tuple type,
-                        // the type of a method, or a type literal, infer from members
-                        if (isInProcess(source, target)) {
-                            return;
-                        }
-                        if (isDeeplyNestedGeneric(source, sourceStack, depth) && isDeeplyNestedGeneric(target, targetStack, depth)) {
-                            return;
-                        }
-                        var key = source.id + "," + target.id;
-                        if (ts.hasProperty(visited, key)) {
-                            return;
-                        }
-                        visited[key] = true;
-                        if (depth === 0) {
-                            sourceStack = [];
-                            targetStack = [];
-                        }
-                        sourceStack[depth] = source;
-                        targetStack[depth] = target;
-                        depth++;
-                        inferFromProperties(source, target);
-                        inferFromSignatures(source, target, 0 /* Call */);
-                        inferFromSignatures(source, target, 1 /* Construct */);
-                        inferFromIndexTypes(source, target);
-                        depth--;
-                    }
-                }
-            }
-            function inferFromProperties(source, target) {
-                var properties = getPropertiesOfObjectType(target);
-                for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
-                    var targetProp = properties_2[_i];
-                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
-                    if (sourceProp) {
-                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
-                    }
-                }
-            }
-            function inferFromSignatures(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                var sourceLen = sourceSignatures.length;
-                var targetLen = targetSignatures.length;
-                var len = sourceLen < targetLen ? sourceLen : targetLen;
-                for (var i = 0; i < len; i++) {
-                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
-                }
-            }
-            function inferFromSignature(source, target) {
-                forEachMatchingParameterType(source, target, inferFromTypes);
-                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
-                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
-                }
-                else {
-                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
-                }
-            }
-            function inferFromIndexTypes(source, target) {
-                var targetStringIndexType = getIndexTypeOfType(target, 0 /* String */);
-                if (targetStringIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 0 /* String */) ||
-                        getImplicitIndexTypeOfType(source, 0 /* String */);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetStringIndexType);
-                    }
-                }
-                var targetNumberIndexType = getIndexTypeOfType(target, 1 /* Number */);
-                if (targetNumberIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 1 /* Number */) ||
-                        getIndexTypeOfType(source, 0 /* String */) ||
-                        getImplicitIndexTypeOfType(source, 1 /* Number */);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetNumberIndexType);
-                    }
-                }
-            }
-        }
-        function typeIdenticalToSomeType(type, types) {
-            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
-                var t = types_7[_i];
-                if (isTypeIdenticalTo(t, type)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        /**
-         * Return a new union or intersection type computed by removing a given set of types
-         * from a given union or intersection type.
-         */
-        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
-            var reducedTypes = [];
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (!typeIdenticalToSomeType(t, typesToRemove)) {
-                    reducedTypes.push(t);
-                }
-            }
-            return type.flags & 16384 /* Union */ ? getUnionType(reducedTypes, /*noSubtypeReduction*/ true) : getIntersectionType(reducedTypes);
-        }
-        function getInferenceCandidates(context, index) {
-            var inferences = context.inferences[index];
-            return inferences.primary || inferences.secondary || emptyArray;
-        }
-        function getInferredType(context, index) {
-            var inferredType = context.inferredTypes[index];
-            var inferenceSucceeded;
-            if (!inferredType) {
-                var inferences = getInferenceCandidates(context, index);
-                if (inferences.length) {
-                    // Infer widened union or supertype, or the unknown type for no common supertype
-                    var unionOrSuperType = context.inferUnionTypes ? getUnionType(inferences) : getCommonSupertype(inferences);
-                    inferredType = unionOrSuperType ? getWidenedType(unionOrSuperType) : unknownType;
-                    inferenceSucceeded = !!unionOrSuperType;
-                }
-                else {
-                    // Infer the empty object type when no inferences were made. It is important to remember that
-                    // in this case, inference still succeeds, meaning there is no error for not having inference
-                    // candidates. An inference error only occurs when there are *conflicting* candidates, i.e.
-                    // candidates with no common supertype.
-                    inferredType = emptyObjectType;
-                    inferenceSucceeded = true;
-                }
-                context.inferredTypes[index] = inferredType;
-                // Only do the constraint check if inference succeeded (to prevent cascading errors)
-                if (inferenceSucceeded) {
-                    var constraint = getConstraintOfTypeParameter(context.typeParameters[index]);
-                    if (constraint) {
-                        var instantiatedConstraint = instantiateType(constraint, getInferenceMapper(context));
-                        if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
-                            context.inferredTypes[index] = inferredType = instantiatedConstraint;
-                        }
-                    }
-                }
-                else if (context.failedTypeParameterIndex === undefined || context.failedTypeParameterIndex > index) {
-                    // If inference failed, it is necessary to record the index of the failed type parameter (the one we are on).
-                    // It might be that inference has already failed on a later type parameter on a previous call to inferTypeArguments.
-                    // So if this failure is on preceding type parameter, this type parameter is the new failure index.
-                    context.failedTypeParameterIndex = index;
-                }
-            }
-            return inferredType;
-        }
-        function getInferredTypes(context) {
-            for (var i = 0; i < context.inferredTypes.length; i++) {
-                getInferredType(context, i);
-            }
-            return context.inferredTypes;
-        }
-        // EXPRESSION TYPE CHECKING
-        function getResolvedSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 /* Value */ | 1048576 /* ExportValue */, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol;
-            }
-            return links.resolvedSymbol;
-        }
-        function isInTypeQuery(node) {
-            // TypeScript 1.0 spec (April 2014): 3.6.3
-            // A type query consists of the keyword typeof followed by an expression.
-            // The expression is restricted to a single identifier or a sequence of identifiers separated by periods
-            while (node) {
-                switch (node.kind) {
-                    case 158 /* TypeQuery */:
-                        return true;
-                    case 69 /* Identifier */:
-                    case 139 /* QualifiedName */:
-                        node = node.parent;
-                        continue;
-                    default:
-                        return false;
-                }
-            }
-            ts.Debug.fail("should not get here");
-        }
-        // Return the flow cache key for a "dotted name" (i.e. a sequence of identifiers
-        // separated by dots). The key consists of the id of the symbol referenced by the
-        // leftmost identifier followed by zero or more property names separated by dots.
-        // The result is undefined if the reference isn't a dotted name.
-        function getFlowCacheKey(node) {
-            if (node.kind === 69 /* Identifier */) {
-                var symbol = getResolvedSymbol(node);
-                return symbol !== unknownSymbol ? "" + getSymbolId(symbol) : undefined;
-            }
-            if (node.kind === 97 /* ThisKeyword */) {
-                return "0";
-            }
-            if (node.kind === 172 /* PropertyAccessExpression */) {
-                var key = getFlowCacheKey(node.expression);
-                return key && key + "." + node.name.text;
-            }
-            return undefined;
-        }
-        function isNullOrUndefinedLiteral(node) {
-            return node.kind === 93 /* NullKeyword */ ||
-                node.kind === 69 /* Identifier */ && getResolvedSymbol(node) === undefinedSymbol;
-        }
-        function getLeftmostIdentifierOrThis(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                    return node;
-                case 172 /* PropertyAccessExpression */:
-                    return getLeftmostIdentifierOrThis(node.expression);
-            }
-            return undefined;
-        }
-        function isMatchingReference(source, target) {
-            if (source.kind === target.kind) {
-                switch (source.kind) {
-                    case 69 /* Identifier */:
-                        return getResolvedSymbol(source) === getResolvedSymbol(target);
-                    case 97 /* ThisKeyword */:
-                        return true;
-                    case 172 /* PropertyAccessExpression */:
-                        return source.name.text === target.name.text &&
-                            isMatchingReference(source.expression, target.expression);
-                }
-            }
-            return false;
-        }
-        function containsMatchingReference(source, target) {
-            while (source.kind === 172 /* PropertyAccessExpression */) {
-                source = source.expression;
-                if (isMatchingReference(source, target)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function isOrContainsMatchingReference(source, target) {
-            return isMatchingReference(source, target) || containsMatchingReference(source, target);
-        }
-        function hasMatchingArgument(callExpression, reference) {
-            if (callExpression.arguments) {
-                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
-                    var argument = _a[_i];
-                    if (isOrContainsMatchingReference(reference, argument)) {
-                        return true;
-                    }
-                }
-            }
-            if (callExpression.expression.kind === 172 /* PropertyAccessExpression */ &&
-                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
-                return true;
-            }
-            return false;
-        }
-        function getFlowNodeId(flow) {
-            if (!flow.id) {
-                flow.id = nextFlowId;
-                nextFlowId++;
-            }
-            return flow.id;
-        }
-        function typeMaybeAssignableTo(source, target) {
-            if (!(source.flags & 16384 /* Union */)) {
-                return isTypeAssignableTo(source, target);
-            }
-            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (isTypeAssignableTo(t, target)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        // Remove those constituent types of declaredType to which no constituent type of assignedType is assignable.
-        // For example, when a variable of type number | string | boolean is assigned a value of type number | boolean,
-        // we remove type string.
-        function getAssignmentReducedType(declaredType, assignedType) {
-            if (declaredType !== assignedType && declaredType.flags & 16384 /* Union */) {
-                var reducedTypes = ts.filter(declaredType.types, function (t) { return typeMaybeAssignableTo(assignedType, t); });
-                if (reducedTypes.length) {
-                    return reducedTypes.length === 1 ? reducedTypes[0] : getUnionType(reducedTypes);
-                }
-            }
-            return declaredType;
-        }
-        function getTypeFacts(type) {
-            var flags = type.flags;
-            if (flags & 258 /* StringLike */) {
-                return strictNullChecks ? 4079361 /* StringStrictFacts */ : 4194049 /* StringFacts */;
-            }
-            if (flags & 132 /* NumberLike */) {
-                return strictNullChecks ? 4079234 /* NumberStrictFacts */ : 4193922 /* NumberFacts */;
-            }
-            if (flags & 8 /* Boolean */) {
-                return strictNullChecks ? 4078980 /* BooleanStrictFacts */ : 4193668 /* BooleanFacts */;
-            }
-            if (flags & 80896 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return resolved.callSignatures.length || resolved.constructSignatures.length || isTypeSubtypeOf(type, globalFunctionType) ?
-                    strictNullChecks ? 1970144 /* FunctionStrictFacts */ : 4181984 /* FunctionFacts */ :
-                    strictNullChecks ? 1972176 /* ObjectStrictFacts */ : 4184016 /* ObjectFacts */;
-            }
-            if (flags & (16 /* Void */ | 32 /* Undefined */)) {
-                return 2457472 /* UndefinedFacts */;
-            }
-            if (flags & 64 /* Null */) {
-                return 2340752 /* NullFacts */;
-            }
-            if (flags & 16777216 /* ESSymbol */) {
-                return strictNullChecks ? 1981320 /* SymbolStrictFacts */ : 4193160 /* SymbolFacts */;
-            }
-            if (flags & 512 /* TypeParameter */) {
-                var constraint = getConstraintOfTypeParameter(type);
-                return constraint ? getTypeFacts(constraint) : 4194303 /* All */;
-            }
-            if (flags & 32768 /* Intersection */) {
-                return ts.reduceLeft(type.types, function (flags, type) { return flags |= getTypeFacts(type); }, 0 /* None */);
-            }
-            return 4194303 /* All */;
-        }
-        function getTypeWithFacts(type, include) {
-            if (!(type.flags & 16384 /* Union */)) {
-                return getTypeFacts(type) & include ? type : neverType;
-            }
-            var firstType;
-            var types;
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (getTypeFacts(t) & include) {
-                    if (!firstType) {
-                        firstType = t;
-                    }
-                    else {
-                        if (!types) {
-                            types = [firstType];
-                        }
-                        types.push(t);
-                    }
-                }
-            }
-            return firstType ? types ? getUnionType(types, /*noSubtypeReduction*/ true) : firstType : neverType;
-        }
-        function getTypeWithDefault(type, defaultExpression) {
-            if (defaultExpression) {
-                var defaultType = checkExpression(defaultExpression);
-                return getUnionType([getTypeWithFacts(type, 131072 /* NEUndefined */), defaultType]);
-            }
-            return type;
-        }
-        function getTypeOfDestructuredProperty(type, name) {
-            var text = getTextOfPropertyName(name);
-            return getTypeOfPropertyOfType(type, text) ||
-                isNumericLiteralName(text) && getIndexTypeOfType(type, 1 /* Number */) ||
-                getIndexTypeOfType(type, 0 /* String */) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredArrayElement(type, index) {
-            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
-                checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredSpreadElement(type) {
-            return createArrayType(checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) || unknownType);
-        }
-        function getAssignedTypeOfBinaryExpression(node) {
-            return node.parent.kind === 170 /* ArrayLiteralExpression */ || node.parent.kind === 253 /* PropertyAssignment */ ?
-                getTypeWithDefault(getAssignedType(node), node.right) :
-                checkExpression(node.right);
-        }
-        function getAssignedTypeOfArrayLiteralElement(node, element) {
-            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
-        }
-        function getAssignedTypeOfSpreadElement(node) {
-            return getTypeOfDestructuredSpreadElement(getAssignedType(node.parent));
-        }
-        function getAssignedTypeOfPropertyAssignment(node) {
-            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
-        }
-        function getAssignedTypeOfShorthandPropertyAssignment(node) {
-            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
-        }
-        function getAssignedType(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 207 /* ForInStatement */:
-                    return stringType;
-                case 208 /* ForOfStatement */:
-                    return checkRightHandSideOfForOf(parent.expression) || unknownType;
-                case 187 /* BinaryExpression */:
-                    return getAssignedTypeOfBinaryExpression(parent);
-                case 181 /* DeleteExpression */:
-                    return undefinedType;
-                case 170 /* ArrayLiteralExpression */:
-                    return getAssignedTypeOfArrayLiteralElement(parent, node);
-                case 191 /* SpreadElementExpression */:
-                    return getAssignedTypeOfSpreadElement(parent);
-                case 253 /* PropertyAssignment */:
-                    return getAssignedTypeOfPropertyAssignment(parent);
-                case 254 /* ShorthandPropertyAssignment */:
-                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
-            }
-            return unknownType;
-        }
-        function getInitialTypeOfBindingElement(node) {
-            var pattern = node.parent;
-            var parentType = getInitialType(pattern.parent);
-            var type = pattern.kind === 167 /* ObjectBindingPattern */ ?
-                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
-                !node.dotDotDotToken ?
-                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
-                    getTypeOfDestructuredSpreadElement(parentType);
-            return getTypeWithDefault(type, node.initializer);
-        }
-        function getTypeOfInitializer(node) {
-            // Return the cached type if one is available. If the type of the variable was inferred
-            // from its initializer, we'll already have cached the type. Otherwise we compute it now
-            // without caching such that transient types are reflected.
-            var links = getNodeLinks(node);
-            return links.resolvedType || checkExpression(node);
-        }
-        function getInitialTypeOfVariableDeclaration(node) {
-            if (node.initializer) {
-                return getTypeOfInitializer(node.initializer);
-            }
-            if (node.parent.parent.kind === 207 /* ForInStatement */) {
-                return stringType;
-            }
-            if (node.parent.parent.kind === 208 /* ForOfStatement */) {
-                return checkRightHandSideOfForOf(node.parent.parent.expression) || unknownType;
-            }
-            return unknownType;
-        }
-        function getInitialType(node) {
-            return node.kind === 218 /* VariableDeclaration */ ?
-                getInitialTypeOfVariableDeclaration(node) :
-                getInitialTypeOfBindingElement(node);
-        }
-        function getFlowTypeOfReference(reference, declaredType, assumeInitialized) {
-            var key;
-            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & 97793 /* Narrowable */)) {
-                return declaredType;
-            }
-            var initialType = assumeInitialized ? declaredType : addNullableKind(declaredType, 32 /* Undefined */);
-            var visitedFlowStart = visitedFlowCount;
-            var result = getTypeAtFlowNode(reference.flowNode);
-            visitedFlowCount = visitedFlowStart;
-            if (reference.parent.kind === 196 /* NonNullExpression */ && getTypeWithFacts(result, 524288 /* NEUndefinedOrNull */) === neverType) {
-                return declaredType;
-            }
-            return result;
-            function getTypeAtFlowNode(flow) {
-                while (true) {
-                    if (flow.flags & 256 /* Shared */) {
-                        // We cache results of flow type resolution for shared nodes that were previously visited in
-                        // the same getFlowTypeOfReference invocation. A node is considered shared when it is the
-                        // antecedent of more than one node.
-                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
-                            if (visitedFlowNodes[i] === flow) {
-                                return visitedFlowTypes[i];
-                            }
-                        }
-                    }
-                    var type = void 0;
-                    if (flow.flags & 16 /* Assignment */) {
-                        type = getTypeAtFlowAssignment(flow);
-                        if (!type) {
-                            flow = flow.antecedent;
-                            continue;
-                        }
-                    }
-                    else if (flow.flags & 96 /* Condition */) {
-                        type = getTypeAtFlowCondition(flow);
-                    }
-                    else if (flow.flags & 12 /* Label */) {
-                        if (flow.antecedents.length === 1) {
-                            flow = flow.antecedents[0];
-                            continue;
-                        }
-                        type = flow.flags & 4 /* BranchLabel */ ?
-                            getTypeAtFlowBranchLabel(flow) :
-                            getTypeAtFlowLoopLabel(flow);
-                    }
-                    else if (flow.flags & 1 /* Unreachable */) {
-                        // Unreachable code errors are reported in the binding phase. Here we
-                        // simply return the declared type to reduce follow-on errors.
-                        type = declaredType;
-                    }
-                    else {
-                        // At the top of the flow we have the initial type.
-                        type = initialType;
-                    }
-                    if (flow.flags & 256 /* Shared */) {
-                        // Record visited node and the associated type in the cache.
-                        visitedFlowNodes[visitedFlowCount] = flow;
-                        visitedFlowTypes[visitedFlowCount] = type;
-                        visitedFlowCount++;
-                    }
-                    return type;
-                }
-            }
-            function getTypeAtFlowAssignment(flow) {
-                var node = flow.node;
-                // Assignments only narrow the computed type if the declared type is a union type. Thus, we
-                // only need to evaluate the assigned type if the declared type is a union type.
-                if ((node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) &&
-                    reference.kind === 69 /* Identifier */ &&
-                    getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(reference)) === getSymbolOfNode(node)) {
-                    return declaredType.flags & 16384 /* Union */ ?
-                        getAssignmentReducedType(declaredType, getInitialType(node)) :
-                        declaredType;
-                }
-                // If the node is not a variable declaration or binding element, it is an identifier
-                // or a dotted name that is the target of an assignment. If we have a match, reduce
-                // the declared type by the assigned type.
-                if (isMatchingReference(reference, node)) {
-                    return declaredType.flags & 16384 /* Union */ ?
-                        getAssignmentReducedType(declaredType, getAssignedType(node)) :
-                        declaredType;
-                }
-                // We didn't have a direct match. However, if the reference is a dotted name, this
-                // may be an assignment to a left hand part of the reference. For example, for a
-                // reference 'x.y.z', we may be at an assignment to 'x.y' or 'x'. In that case,
-                // return the declared type.
-                if (containsMatchingReference(reference, node)) {
-                    return declaredType;
-                }
-                // Assignment doesn't affect reference
-                return undefined;
-            }
-            function getTypeAtFlowCondition(flow) {
-                var type = getTypeAtFlowNode(flow.antecedent);
-                if (type !== neverType) {
-                    // If we have an antecedent type (meaning we're reachable in some way), we first
-                    // attempt to narrow the antecedent type. If that produces the nothing type, then
-                    // we take the type guard as an indication that control could reach here in a
-                    // manner not understood by the control flow analyzer (e.g. a function argument
-                    // has an invalid type, or a nested function has possibly made an assignment to a
-                    // captured variable). We proceed by reverting to the declared type and then
-                    // narrow that.
-                    var assumeTrue = (flow.flags & 32 /* TrueCondition */) !== 0;
-                    type = narrowType(type, flow.expression, assumeTrue);
-                    if (type === neverType) {
-                        type = narrowType(declaredType, flow.expression, assumeTrue);
-                    }
-                }
-                return type;
-            }
-            function getTypeAtFlowBranchLabel(flow) {
-                var antecedentTypes = [];
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    var type = getTypeAtFlowNode(antecedent);
-                    // If the type at a particular antecedent path is the declared type and the
-                    // reference is known to always be assigned (i.e. when declared and initial types
-                    // are the same), there is no reason to process more antecedents since the only
-                    // possible outcome is subtypes that will be removed in the final union type anyway.
-                    if (type === declaredType && declaredType === initialType) {
-                        return type;
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                }
-                return getUnionType(antecedentTypes);
-            }
-            function getTypeAtFlowLoopLabel(flow) {
-                // If we have previously computed the control flow type for the reference at
-                // this flow loop junction, return the cached type.
-                var id = getFlowNodeId(flow);
-                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = {});
-                if (!key) {
-                    key = getFlowCacheKey(reference);
-                }
-                if (cache[key]) {
-                    return cache[key];
-                }
-                // If this flow loop junction and reference are already being processed, return
-                // the union of the types computed for each branch so far. We should never see
-                // an empty array here because the first antecedent of a loop junction is always
-                // the non-looping control flow path that leads to the top.
-                for (var i = flowLoopStart; i < flowLoopCount; i++) {
-                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key) {
-                        return getUnionType(flowLoopTypes[i]);
-                    }
-                }
-                // Add the flow loop junction and reference to the in-process stack and analyze
-                // each antecedent code path.
-                var antecedentTypes = [];
-                flowLoopNodes[flowLoopCount] = flow;
-                flowLoopKeys[flowLoopCount] = key;
-                flowLoopTypes[flowLoopCount] = antecedentTypes;
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    flowLoopCount++;
-                    var type = getTypeAtFlowNode(antecedent);
-                    flowLoopCount--;
-                    // If we see a value appear in the cache it is a sign that control flow  analysis
-                    // was restarted and completed by checkExpressionCached. We can simply pick up
-                    // the resulting type and bail out.
-                    if (cache[key]) {
-                        return cache[key];
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                    // If the type at a particular antecedent path is the declared type there is no
-                    // reason to process more antecedents since the only possible outcome is subtypes
-                    // that will be removed in the final union type anyway.
-                    if (type === declaredType) {
-                        break;
-                    }
-                }
-                return cache[key] = getUnionType(antecedentTypes);
-            }
-            function narrowTypeByTruthiness(type, expr, assumeTrue) {
-                return isMatchingReference(reference, expr) ? getTypeWithFacts(type, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */) : type;
-            }
-            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
-                switch (expr.operatorToken.kind) {
-                    case 56 /* EqualsToken */:
-                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
-                    case 30 /* EqualsEqualsToken */:
-                    case 31 /* ExclamationEqualsToken */:
-                    case 32 /* EqualsEqualsEqualsToken */:
-                    case 33 /* ExclamationEqualsEqualsToken */:
-                        if (isNullOrUndefinedLiteral(expr.right)) {
-                            return narrowTypeByNullCheck(type, expr, assumeTrue);
-                        }
-                        if (expr.left.kind === 182 /* TypeOfExpression */ && expr.right.kind === 9 /* StringLiteral */) {
-                            return narrowTypeByTypeof(type, expr, assumeTrue);
-                        }
-                        break;
-                    case 91 /* InstanceOfKeyword */:
-                        return narrowTypeByInstanceof(type, expr, assumeTrue);
-                    case 24 /* CommaToken */:
-                        return narrowType(type, expr.right, assumeTrue);
-                }
-                return type;
-            }
-            function narrowTypeByNullCheck(type, expr, assumeTrue) {
-                // We have '==', '!=', '===', or '!==' operator with 'null' or 'undefined' on the right
-                var operator = expr.operatorToken.kind;
-                if (operator === 31 /* ExclamationEqualsToken */ || operator === 33 /* ExclamationEqualsEqualsToken */) {
-                    assumeTrue = !assumeTrue;
-                }
-                if (!strictNullChecks || !isMatchingReference(reference, expr.left)) {
-                    return type;
-                }
-                var doubleEquals = operator === 30 /* EqualsEqualsToken */ || operator === 31 /* ExclamationEqualsToken */;
-                var facts = doubleEquals ?
-                    assumeTrue ? 65536 /* EQUndefinedOrNull */ : 524288 /* NEUndefinedOrNull */ :
-                    expr.right.kind === 93 /* NullKeyword */ ?
-                        assumeTrue ? 32768 /* EQNull */ : 262144 /* NENull */ :
-                        assumeTrue ? 16384 /* EQUndefined */ : 131072 /* NEUndefined */;
-                return getTypeWithFacts(type, facts);
-            }
-            function narrowTypeByTypeof(type, expr, assumeTrue) {
-                // We have '==', '!=', '====', or !==' operator with 'typeof xxx' on the left
-                // and string literal on the right
-                var left = expr.left;
-                var right = expr.right;
-                if (!isMatchingReference(reference, left.expression)) {
-                    // For a reference of the form 'x.y', a 'typeof x === ...' type guard resets the
-                    // narrowed type of 'y' to its declared type.
-                    if (containsMatchingReference(reference, left.expression)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                if (expr.operatorToken.kind === 31 /* ExclamationEqualsToken */ ||
-                    expr.operatorToken.kind === 33 /* ExclamationEqualsEqualsToken */) {
-                    assumeTrue = !assumeTrue;
-                }
-                if (assumeTrue && !(type.flags & 16384 /* Union */)) {
-                    // We narrow a non-union type to an exact primitive type if the non-union type
-                    // is a supertype of that primtive type. For example, type 'any' can be narrowed
-                    // to one of the primitive types.
-                    var targetType = ts.getProperty(typeofTypesByName, right.text);
-                    if (targetType && isTypeSubtypeOf(targetType, type)) {
-                        return targetType;
-                    }
-                }
-                var facts = assumeTrue ?
-                    ts.getProperty(typeofEQFacts, right.text) || 64 /* TypeofEQHostObject */ :
-                    ts.getProperty(typeofNEFacts, right.text) || 8192 /* TypeofNEHostObject */;
-                return getTypeWithFacts(type, facts);
-            }
-            function narrowTypeByInstanceof(type, expr, assumeTrue) {
-                if (!isMatchingReference(reference, expr.left)) {
-                    // For a reference of the form 'x.y', an 'x instanceof T' type guard resets the
-                    // narrowed type of 'y' to its declared type.
-                    if (containsMatchingReference(reference, expr.left)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                // We never narrow type any in an instanceof guard
-                if (isTypeAny(type)) {
-                    return type;
-                }
-                // Check that right operand is a function type with a prototype property
-                var rightType = checkExpression(expr.right);
-                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
-                    return type;
-                }
-                var targetType;
-                var prototypeProperty = getPropertyOfType(rightType, "prototype");
-                if (prototypeProperty) {
-                    // Target type is type of the prototype property
-                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
-                    if (!isTypeAny(prototypePropertyType)) {
-                        targetType = prototypePropertyType;
-                    }
-                }
-                if (!targetType) {
-                    // Target type is type of construct signature
-                    var constructSignatures = void 0;
-                    if (rightType.flags & 2048 /* Interface */) {
-                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
-                    }
-                    else if (rightType.flags & 65536 /* Anonymous */) {
-                        constructSignatures = getSignaturesOfType(rightType, 1 /* Construct */);
-                    }
-                    if (constructSignatures && constructSignatures.length) {
-                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
-                    }
-                }
-                if (targetType) {
-                    return getNarrowedType(type, targetType, assumeTrue);
-                }
-                return type;
-            }
-            function getNarrowedType(type, candidate, assumeTrue) {
-                if (!assumeTrue) {
-                    return type.flags & 16384 /* Union */ ?
-                        getUnionType(ts.filter(type.types, function (t) { return !isTypeSubtypeOf(t, candidate); })) :
-                        type;
-                }
-                // If the current type is a union type, remove all constituents that aren't assignable to
-                // the candidate type. If one or more constituents remain, return a union of those.
-                if (type.flags & 16384 /* Union */) {
-                    var assignableConstituents = ts.filter(type.types, function (t) { return isTypeAssignableTo(t, candidate); });
-                    if (assignableConstituents.length) {
-                        return getUnionType(assignableConstituents);
-                    }
-                }
-                // If the candidate type is assignable to the target type, narrow to the candidate type.
-                // Otherwise, if the current type is assignable to the candidate, keep the current type.
-                // Otherwise, the types are completely unrelated, so narrow to the empty type.
-                var targetType = type.flags & 512 /* TypeParameter */ ? getApparentType(type) : type;
-                return isTypeAssignableTo(candidate, targetType) ? candidate :
-                    isTypeAssignableTo(type, candidate) ? type :
-                        neverType;
-            }
-            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
-                if (type.flags & 1 /* Any */ || !hasMatchingArgument(callExpression, reference)) {
-                    return type;
-                }
-                var signature = getResolvedSignature(callExpression);
-                var predicate = signature.typePredicate;
-                if (!predicate) {
-                    return type;
-                }
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    var predicateArgument = callExpression.arguments[predicate.parameterIndex];
-                    if (predicateArgument) {
-                        if (isMatchingReference(reference, predicateArgument)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, predicateArgument)) {
-                            return declaredType;
-                        }
-                    }
-                }
-                else {
-                    var invokedExpression = skipParenthesizedNodes(callExpression.expression);
-                    if (invokedExpression.kind === 173 /* ElementAccessExpression */ || invokedExpression.kind === 172 /* PropertyAccessExpression */) {
-                        var accessExpression = invokedExpression;
-                        var possibleReference = skipParenthesizedNodes(accessExpression.expression);
-                        if (isMatchingReference(reference, possibleReference)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, possibleReference)) {
-                            return declaredType;
-                        }
-                    }
-                }
-                return type;
-            }
-            // Narrow the given type based on the given expression having the assumed boolean value. The returned type
-            // will be a subtype or the same type as the argument.
-            function narrowType(type, expr, assumeTrue) {
-                switch (expr.kind) {
-                    case 69 /* Identifier */:
-                    case 97 /* ThisKeyword */:
-                    case 172 /* PropertyAccessExpression */:
-                        return narrowTypeByTruthiness(type, expr, assumeTrue);
-                    case 174 /* CallExpression */:
-                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
-                    case 178 /* ParenthesizedExpression */:
-                        return narrowType(type, expr.expression, assumeTrue);
-                    case 187 /* BinaryExpression */:
-                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
-                    case 185 /* PrefixUnaryExpression */:
-                        if (expr.operator === 49 /* ExclamationToken */) {
-                            return narrowType(type, expr.operand, !assumeTrue);
-                        }
-                        break;
-                }
-                return type;
-            }
-        }
-        function getTypeOfSymbolAtLocation(symbol, location) {
-            // If we have an identifier or a property access at the given location, if the location is
-            // an dotted name expression, and if the location is not an assignment target, obtain the type
-            // of the expression (which will reflect control flow analysis). If the expression indeed
-            // resolved to the given symbol, return the narrowed type.
-            if (location.kind === 69 /* Identifier */) {
-                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
-                    location = location.parent;
-                }
-                if (ts.isExpression(location) && !ts.isAssignmentTarget(location)) {
-                    var type = checkExpression(location);
-                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
-                        return type;
-                    }
-                }
-            }
-            // The location isn't a reference to the given symbol, meaning we're being asked
-            // a hypothetical question of what type the symbol would have if there was a reference
-            // to it at the given location. Since we have no control flow information for the
-            // hypotherical reference (control flow information is created and attached by the
-            // binder), we simply return the declared type of the symbol.
-            return getTypeOfSymbol(symbol);
-        }
-        function skipParenthesizedNodes(expression) {
-            while (expression.kind === 178 /* ParenthesizedExpression */) {
-                expression = expression.expression;
-            }
-            return expression;
-        }
-        function checkIdentifier(node) {
-            var symbol = getResolvedSymbol(node);
-            // As noted in ECMAScript 6 language spec, arrow functions never have an arguments objects.
-            // Although in down-level emit of arrow function, we emit it using function expression which means that
-            // arguments objects will be bound to the inner object; emitting arrow function natively in ES6, arguments objects
-            // will be bound to non-arrow function that contain this arrow function. This results in inconsistent behavior.
-            // To avoid that we will give an error to users if they use arguments objects in arrow function so that they
-            // can explicitly bound arguments objects
-            if (symbol === argumentsSymbol) {
-                var container = ts.getContainingFunction(node);
-                if (container.kind === 180 /* ArrowFunction */) {
-                    if (languageVersion < 2 /* ES6 */) {
-                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
-                    }
-                }
-                if (node.flags & 33554432 /* AwaitContext */) {
-                    getNodeLinks(container).flags |= 8192 /* CaptureArguments */;
-                }
-            }
-            if (symbol.flags & 8388608 /* Alias */ && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
-                markAliasSymbolAsReferenced(symbol);
-            }
-            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
-            // Due to the emit for class decorators, any reference to the class from inside of the class body
-            // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
-            // behavior of class names in ES6.
-            if (languageVersion === 2 /* ES6 */
-                && localOrExportSymbol.flags & 32 /* Class */
-                && localOrExportSymbol.valueDeclaration.kind === 221 /* ClassDeclaration */
-                && ts.nodeIsDecorated(localOrExportSymbol.valueDeclaration)) {
-                var container = ts.getContainingClass(node);
-                while (container !== undefined) {
-                    if (container === localOrExportSymbol.valueDeclaration && container.name !== node) {
-                        getNodeLinks(container).flags |= 524288 /* ClassWithBodyScopedClassBinding */;
-                        getNodeLinks(node).flags |= 1048576 /* BodyScopedClassBinding */;
-                        break;
-                    }
-                    container = ts.getContainingClass(container);
-                }
-            }
-            checkCollisionWithCapturedSuperVariable(node, node);
-            checkCollisionWithCapturedThisVariable(node, node);
-            checkNestedBlockScopedBinding(node, symbol);
-            var type = getTypeOfSymbol(localOrExportSymbol);
-            if (!(localOrExportSymbol.flags & 3 /* Variable */) || ts.isAssignmentTarget(node)) {
-                return type;
-            }
-            var declaration = localOrExportSymbol.valueDeclaration;
-            var assumeInitialized = !strictNullChecks || (type.flags & 1 /* Any */) !== 0 || !declaration ||
-                ts.getRootDeclaration(declaration).kind === 142 /* Parameter */ || ts.isInAmbientContext(declaration) ||
-                ts.getContainingFunctionOrModule(declaration) !== ts.getContainingFunctionOrModule(node);
-            var flowType = getFlowTypeOfReference(node, type, assumeInitialized);
-            if (!assumeInitialized && !(getNullableKind(type) & 32 /* Undefined */) && getNullableKind(flowType) & 32 /* Undefined */) {
-                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
-                // Return the declared type to reduce follow-on errors
-                return type;
-            }
-            return flowType;
-        }
-        function isInsideFunction(node, threshold) {
-            var current = node;
-            while (current && current !== threshold) {
-                if (ts.isFunctionLike(current)) {
-                    return true;
-                }
-                current = current.parent;
-            }
-            return false;
-        }
-        function checkNestedBlockScopedBinding(node, symbol) {
-            if (languageVersion >= 2 /* ES6 */ ||
-                (symbol.flags & (2 /* BlockScopedVariable */ | 32 /* Class */)) === 0 ||
-                symbol.valueDeclaration.parent.kind === 252 /* CatchClause */) {
-                return;
-            }
-            // 1. walk from the use site up to the declaration and check
-            // if there is anything function like between declaration and use-site (is binding/class is captured in function).
-            // 2. walk from the declaration up to the boundary of lexical environment and check
-            // if there is an iteration statement in between declaration and boundary (is binding/class declared inside iteration statement)
-            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-            var usedInFunction = isInsideFunction(node.parent, container);
-            var current = container;
-            var containedInIterationStatement = false;
-            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
-                if (ts.isIterationStatement(current, /*lookInLabeledStatements*/ false)) {
-                    containedInIterationStatement = true;
-                    break;
-                }
-                current = current.parent;
-            }
-            if (containedInIterationStatement) {
-                if (usedInFunction) {
-                    // mark iteration statement as containing block-scoped binding captured in some function
-                    getNodeLinks(current).flags |= 65536 /* LoopWithCapturedBlockScopedBinding */;
-                }
-                // mark variables that are declared in loop initializer and reassigned inside the body of ForStatement.
-                // if body of ForStatement will be converted to function then we'll need a extra machinery to propagate reassigned values back.
-                if (container.kind === 206 /* ForStatement */ &&
-                    ts.getAncestor(symbol.valueDeclaration, 219 /* VariableDeclarationList */).parent === container &&
-                    isAssignedInBodyOfForStatement(node, container)) {
-                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152 /* NeedsLoopOutParameter */;
-                }
-                // set 'declared inside loop' bit on the block-scoped binding
-                getNodeLinks(symbol.valueDeclaration).flags |= 262144 /* BlockScopedBindingInLoop */;
-            }
-            if (usedInFunction) {
-                getNodeLinks(symbol.valueDeclaration).flags |= 131072 /* CapturedBlockScopedBinding */;
-            }
-        }
-        function isAssignedInBodyOfForStatement(node, container) {
-            var current = node;
-            // skip parenthesized nodes
-            while (current.parent.kind === 178 /* ParenthesizedExpression */) {
-                current = current.parent;
-            }
-            // check if node is used as LHS in some assignment expression
-            var isAssigned = false;
-            if (ts.isAssignmentTarget(current)) {
-                isAssigned = true;
-            }
-            else if ((current.parent.kind === 185 /* PrefixUnaryExpression */ || current.parent.kind === 186 /* PostfixUnaryExpression */)) {
-                var expr = current.parent;
-                isAssigned = expr.operator === 41 /* PlusPlusToken */ || expr.operator === 42 /* MinusMinusToken */;
-            }
-            if (!isAssigned) {
-                return false;
-            }
-            // at this point we know that node is the target of assignment
-            // now check that modification happens inside the statement part of the ForStatement
-            while (current !== container) {
-                if (current === container.statement) {
-                    return true;
-                }
-                else {
-                    current = current.parent;
-                }
-            }
-            return false;
-        }
-        function captureLexicalThis(node, container) {
-            getNodeLinks(node).flags |= 2 /* LexicalThis */;
-            if (container.kind === 145 /* PropertyDeclaration */ || container.kind === 148 /* Constructor */) {
-                var classNode = container.parent;
-                getNodeLinks(classNode).flags |= 4 /* CaptureThis */;
-            }
-            else {
-                getNodeLinks(container).flags |= 4 /* CaptureThis */;
-            }
-        }
-        function findFirstSuperCall(n) {
-            if (ts.isSuperCallExpression(n)) {
-                return n;
-            }
-            else if (ts.isFunctionLike(n)) {
-                return undefined;
-            }
-            return ts.forEachChild(n, findFirstSuperCall);
-        }
-        /**
-         * Return a cached result if super-statement is already found.
-         * Otherwise, find a super statement in a given constructor function and cache the result in the node-links of the constructor
-         *
-         * @param constructor constructor-function to look for super statement
-         */
-        function getSuperCallInConstructor(constructor) {
-            var links = getNodeLinks(constructor);
-            // Only trying to find super-call if we haven't yet tried to find one.  Once we try, we will record the result
-            if (links.hasSuperCall === undefined) {
-                links.superCall = findFirstSuperCall(constructor.body);
-                links.hasSuperCall = links.superCall ? true : false;
-            }
-            return links.superCall;
-        }
-        /**
-         * Check if the given class-declaration extends null then return true.
-         * Otherwise, return false
-         * @param classDecl a class declaration to check if it extends null
-         */
-        function classDeclarationExtendsNull(classDecl) {
-            var classSymbol = getSymbolOfNode(classDecl);
-            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
-            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
-            return baseConstructorType === nullType;
-        }
-        function checkThisExpression(node) {
-            // Stop at the first arrow function so that we can
-            // tell whether 'this' needs to be captured.
-            var container = ts.getThisContainer(node, /* includeArrowFunctions */ true);
-            var needToCaptureLexicalThis = false;
-            if (container.kind === 148 /* Constructor */) {
-                var containingClassDecl = container.parent;
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
-                // If a containing class does not have extends clause or the class extends null
-                // skip checking whether super statement is called before "this" accessing.
-                if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
-                    var superCall = getSuperCallInConstructor(container);
-                    // We should give an error in the following cases:
-                    //      - No super-call
-                    //      - "this" is accessing before super-call.
-                    //          i.e super(this)
-                    //              this.x; super();
-                    // We want to make sure that super-call is done before accessing "this" so that
-                    // "this" is not accessed as a parameter of the super-call.
-                    if (!superCall || superCall.end > node.pos) {
-                        // In ES6, super inside constructor of class-declaration has to precede "this" accessing
-                        error(node, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
-                    }
-                }
-            }
-            // Now skip arrow functions to get the "real" owner of 'this'.
-            if (container.kind === 180 /* ArrowFunction */) {
-                container = ts.getThisContainer(container, /* includeArrowFunctions */ false);
-                // When targeting es6, arrow function lexically bind "this" so we do not need to do the work of binding "this" in emitted code
-                needToCaptureLexicalThis = (languageVersion < 2 /* ES6 */);
-            }
-            switch (container.kind) {
-                case 225 /* ModuleDeclaration */:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
-                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
-                    break;
-                case 224 /* EnumDeclaration */:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
-                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
-                    break;
-                case 148 /* Constructor */:
-                    if (isInConstructorArgumentInitializer(node, container)) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
-                    }
-                    break;
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    if (container.flags & 32 /* Static */) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
-                    }
-                    break;
-                case 140 /* ComputedPropertyName */:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
-                    break;
-            }
-            if (needToCaptureLexicalThis) {
-                captureLexicalThis(node, container);
-            }
-            if (ts.isFunctionLike(container)) {
-                // If this is a function in a JS file, it might be a class method. Check if it's the RHS
-                // of a x.prototype.y = function [name]() { .... }
-                if (container.kind === 179 /* FunctionExpression */ &&
-                    ts.isInJavaScriptFile(container.parent) &&
-                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3 /* PrototypeProperty */) {
-                    // Get the 'x' of 'x.prototype.y = f' (here, 'f' is 'container')
-                    var className = container.parent // x.prototype.y = f
-                        .left // x.prototype.y
-                        .expression // x.prototype
-                        .expression; // x
-                    var classSymbol = checkExpression(className).symbol;
-                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16 /* Function */)) {
-                        return getInferredClassType(classSymbol);
-                    }
-                }
-                var type = getContextuallyTypedThisType(container);
-                if (type) {
-                    return type;
-                }
-                var signature = getSignatureFromDeclaration(container);
-                if (signature.thisType) {
-                    return signature.thisType;
-                }
-            }
-            if (ts.isClassLike(container.parent)) {
-                var symbol = getSymbolOfNode(container.parent);
-                var type = container.flags & 32 /* Static */ ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
-                return getFlowTypeOfReference(node, type, /*assumeInitialized*/ true);
-            }
-            if (ts.isInJavaScriptFile(node)) {
-                var type = getTypeForThisExpressionFromJSDoc(container);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            if (compilerOptions.noImplicitThis) {
-                // With noImplicitThis, functions may not reference 'this' if it has type 'any'
-                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
-            }
-            return anyType;
-        }
-        function getTypeForThisExpressionFromJSDoc(node) {
-            var typeTag = ts.getJSDocTypeTag(node);
-            if (typeTag && typeTag.typeExpression && typeTag.typeExpression.type && typeTag.typeExpression.type.kind === 269 /* JSDocFunctionType */) {
-                var jsDocFunctionType = typeTag.typeExpression.type;
-                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 272 /* JSDocThisType */) {
-                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
-                }
-            }
-        }
-        function isInConstructorArgumentInitializer(node, constructorDecl) {
-            for (var n = node; n && n !== constructorDecl; n = n.parent) {
-                if (n.kind === 142 /* Parameter */) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function checkSuperExpression(node) {
-            var isCallExpression = node.parent.kind === 174 /* CallExpression */ && node.parent.expression === node;
-            var container = ts.getSuperContainer(node, /*stopOnFunctions*/ true);
-            var needToCaptureLexicalThis = false;
-            if (!isCallExpression) {
-                // adjust the container reference in case if super is used inside arrow functions with arbitrary deep nesting
-                while (container && container.kind === 180 /* ArrowFunction */) {
-                    container = ts.getSuperContainer(container, /*stopOnFunctions*/ true);
-                    needToCaptureLexicalThis = languageVersion < 2 /* ES6 */;
-                }
-            }
-            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
-            var nodeCheckFlag = 0;
-            if (!canUseSuperExpression) {
-                // issue more specific error if super is used in computed property name
-                // class A { foo() { return "1" }}
-                // class B {
-                //     [super.foo()]() {}
-                // }
-                var current = node;
-                while (current && current !== container && current.kind !== 140 /* ComputedPropertyName */) {
-                    current = current.parent;
-                }
-                if (current && current.kind === 140 /* ComputedPropertyName */) {
-                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
-                }
-                else if (isCallExpression) {
-                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
-                }
-                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 171 /* ObjectLiteralExpression */)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
-                }
-                else {
-                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
-                }
-                return unknownType;
-            }
-            if ((container.flags & 32 /* Static */) || isCallExpression) {
-                nodeCheckFlag = 512 /* SuperStatic */;
-            }
-            else {
-                nodeCheckFlag = 256 /* SuperInstance */;
-            }
-            getNodeLinks(node).flags |= nodeCheckFlag;
-            // Due to how we emit async functions, we need to specialize the emit for an async method that contains a `super` reference.
-            // This is due to the fact that we emit the body of an async function inside of a generator function. As generator
-            // functions cannot reference `super`, we emit a helper inside of the method body, but outside of the generator. This helper
-            // uses an arrow function, which is permitted to reference `super`.
-            //
-            // There are two primary ways we can access `super` from within an async method. The first is getting the value of a property
-            // or indexed access on super, either as part of a right-hand-side expression or call expression. The second is when setting the value
-            // of a property or indexed access, either as part of an assignment expression or destructuring assignment.
-            //
-            // The simplest case is reading a value, in which case we will emit something like the following:
-            //
-            //  // ts
-            //  ...
-            //  async asyncMethod() {
-            //    let x = await super.asyncMethod();
-            //    return x;
-            //  }
-            //  ...
-            //
-            //  // js
-            //  ...
-            //  asyncMethod() {
-            //      const _super = name => super[name];
-            //      return __awaiter(this, arguments, Promise, function *() {
-            //          let x = yield _super("asyncMethod").call(this);
-            //          return x;
-            //      });
-            //  }
-            //  ...
-            //
-            // The more complex case is when we wish to assign a value, especially as part of a destructuring assignment. As both cases
-            // are legal in ES6, but also likely less frequent, we emit the same more complex helper for both scenarios:
-            //
-            //  // ts
-            //  ...
-            //  async asyncMethod(ar: Promise<any[]>) {
-            //      [super.a, super.b] = await ar;
-            //  }
-            //  ...
-            //
-            //  // js
-            //  ...
-            //  asyncMethod(ar) {
-            //      const _super = (function (geti, seti) {
-            //          const cache = Object.create(null);
-            //          return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
-            //      })(name => super[name], (name, value) => super[name] = value);
-            //      return __awaiter(this, arguments, Promise, function *() {
-            //          [_super("a").value, _super("b").value] = yield ar;
-            //      });
-            //  }
-            //  ...
-            //
-            // This helper creates an object with a "value" property that wraps the `super` property or indexed access for both get and set.
-            // This is required for destructuring assignments, as a call expression cannot be used as the target of a destructuring assignment
-            // while a property access can.
-            if (container.kind === 147 /* MethodDeclaration */ && container.flags & 256 /* Async */) {
-                if (ts.isSuperPropertyOrElementAccess(node.parent) && ts.isAssignmentTarget(node.parent)) {
-                    getNodeLinks(container).flags |= 4096 /* AsyncMethodWithSuperBinding */;
-                }
-                else {
-                    getNodeLinks(container).flags |= 2048 /* AsyncMethodWithSuper */;
-                }
-            }
-            if (needToCaptureLexicalThis) {
-                // call expressions are allowed only in constructors so they should always capture correct 'this'
-                // super property access expressions can also appear in arrow functions -
-                // in this case they should also use correct lexical this
-                captureLexicalThis(node.parent, container);
-            }
-            if (container.parent.kind === 171 /* ObjectLiteralExpression */) {
-                if (languageVersion < 2 /* ES6 */) {
-                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
-                    return unknownType;
-                }
-                else {
-                    // for object literal assume that type of 'super' is 'any'
-                    return anyType;
-                }
-            }
-            // at this point the only legal case for parent is ClassLikeDeclaration
-            var classLikeDeclaration = container.parent;
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
-            var baseClassType = classType && getBaseTypes(classType)[0];
-            if (!baseClassType) {
-                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
-                }
-                return unknownType;
-            }
-            if (container.kind === 148 /* Constructor */ && isInConstructorArgumentInitializer(node, container)) {
-                // issue custom error message for super property access in constructor arguments (to be aligned with old compiler)
-                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
-                return unknownType;
-            }
-            return nodeCheckFlag === 512 /* SuperStatic */
-                ? getBaseConstructorTypeOfClass(classType)
-                : getTypeWithThisArgument(baseClassType, classType.thisType);
-            function isLegalUsageOfSuperExpression(container) {
-                if (!container) {
-                    return false;
-                }
-                if (isCallExpression) {
-                    // TS 1.0 SPEC (April 2014): 4.8.1
-                    // Super calls are only permitted in constructors of derived classes
-                    return container.kind === 148 /* Constructor */;
-                }
-                else {
-                    // TS 1.0 SPEC (April 2014)
-                    // 'super' property access is allowed
-                    // - In a constructor, instance member function, instance member accessor, or instance member variable initializer where this references a derived class instance
-                    // - In a static member function or static member accessor
-                    // topmost container must be something that is directly nested in the class declaration\object literal expression
-                    if (ts.isClassLike(container.parent) || container.parent.kind === 171 /* ObjectLiteralExpression */) {
-                        if (container.flags & 32 /* Static */) {
-                            return container.kind === 147 /* MethodDeclaration */ ||
-                                container.kind === 146 /* MethodSignature */ ||
-                                container.kind === 149 /* GetAccessor */ ||
-                                container.kind === 150 /* SetAccessor */;
-                        }
-                        else {
-                            return container.kind === 147 /* MethodDeclaration */ ||
-                                container.kind === 146 /* MethodSignature */ ||
-                                container.kind === 149 /* GetAccessor */ ||
-                                container.kind === 150 /* SetAccessor */ ||
-                                container.kind === 145 /* PropertyDeclaration */ ||
-                                container.kind === 144 /* PropertySignature */ ||
-                                container.kind === 148 /* Constructor */;
-                        }
-                    }
-                }
-                return false;
-            }
-        }
-        function getContextuallyTypedThisType(func) {
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func) && func.kind !== 180 /* ArrowFunction */) {
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    return contextualSignature.thisType;
-                }
-            }
-            return undefined;
-        }
-        // Return contextual type of parameter or undefined if no contextual type is available
-        function getContextuallyTypedParameterType(parameter) {
-            var func = parameter.parent;
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
-                var iife = getImmediatelyInvokedFunctionExpression(func);
-                if (iife) {
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
-                        if (parameter.dotDotDotToken) {
-                            var restTypes = [];
-                            for (var i = indexOfParameter; i < iife.arguments.length; i++) {
-                                restTypes.push(getTypeOfExpression(iife.arguments[i]));
-                            }
-                            return createArrayType(getUnionType(restTypes));
-                        }
-                        var links = getNodeLinks(iife);
-                        var cached = links.resolvedSignature;
-                        links.resolvedSignature = anySignature;
-                        var type = checkExpression(iife.arguments[indexOfParameter]);
-                        links.resolvedSignature = cached;
-                        return type;
-                    }
-                }
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    var funcHasRestParameters = ts.hasRestParameter(func);
-                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (indexOfParameter < len) {
-                        return getTypeAtPosition(contextualSignature, indexOfParameter);
-                    }
-                    // If last parameter is contextually rest parameter get its type
-                    if (funcHasRestParameters &&
-                        indexOfParameter === (func.parameters.length - 1) &&
-                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
-                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
-                    }
-                }
-            }
-            return undefined;
-        }
-        function getImmediatelyInvokedFunctionExpression(func) {
-            if (isFunctionExpressionOrArrowFunction(func)) {
-                var prev = func;
-                var parent_8 = func.parent;
-                while (parent_8.kind === 178 /* ParenthesizedExpression */) {
-                    prev = parent_8;
-                    parent_8 = parent_8.parent;
-                }
-                if (parent_8.kind === 174 /* CallExpression */ && parent_8.expression === prev) {
-                    return parent_8;
-                }
-            }
-        }
-        // In a variable, parameter or property declaration with a type annotation,
-        //   the contextual type of an initializer expression is the type of the variable, parameter or property.
-        // Otherwise, in a parameter declaration of a contextually typed function expression,
-        //   the contextual type of an initializer expression is the contextual type of the parameter.
-        // Otherwise, in a variable or parameter declaration with a binding pattern name,
-        //   the contextual type of an initializer expression is the type implied by the binding pattern.
-        // Otherwise, in a binding pattern inside a variable or parameter declaration,
-        //   the contextual type of an initializer expression is the type annotation of the containing declaration, if present.
-        function getContextualTypeForInitializerExpression(node) {
-            var declaration = node.parent;
-            if (node === declaration.initializer) {
-                if (declaration.type) {
-                    return getTypeFromTypeNode(declaration.type);
-                }
-                if (declaration.kind === 142 /* Parameter */) {
-                    var type = getContextuallyTypedParameterType(declaration);
-                    if (type) {
-                        return type;
-                    }
-                }
-                if (ts.isBindingPattern(declaration.name)) {
-                    return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ true);
-                }
-                if (ts.isBindingPattern(declaration.parent)) {
-                    var parentDeclaration = declaration.parent.parent;
-                    var name_11 = declaration.propertyName || declaration.name;
-                    if (ts.isVariableLike(parentDeclaration) &&
-                        parentDeclaration.type &&
-                        !ts.isBindingPattern(name_11)) {
-                        var text = getTextOfPropertyName(name_11);
-                        if (text) {
-                            return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text);
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function getContextualTypeForReturnExpression(node) {
-            var func = ts.getContainingFunction(node);
-            if (func && !func.asteriskToken) {
-                return getContextualReturnType(func);
-            }
-            return undefined;
-        }
-        function getContextualTypeForYieldOperand(node) {
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var contextualReturnType = getContextualReturnType(func);
-                if (contextualReturnType) {
-                    return node.asteriskToken
-                        ? contextualReturnType
-                        : getElementTypeOfIterableIterator(contextualReturnType);
-                }
-            }
-            return undefined;
-        }
-        function isInParameterInitializerBeforeContainingFunction(node) {
-            while (node.parent && !ts.isFunctionLike(node.parent)) {
-                if (node.parent.kind === 142 /* Parameter */ && node.parent.initializer === node) {
-                    return true;
-                }
-                node = node.parent;
-            }
-            return false;
-        }
-        function getContextualReturnType(functionDecl) {
-            // If the containing function has a return type annotation, is a constructor, or is a get accessor whose
-            // corresponding set accessor has a type annotation, return statements in the function are contextually typed
-            if (functionDecl.type ||
-                functionDecl.kind === 148 /* Constructor */ ||
-                functionDecl.kind === 149 /* GetAccessor */ && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(functionDecl.symbol, 150 /* SetAccessor */))) {
-                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
-            }
-            // Otherwise, if the containing function is contextually typed by a function type with exactly one call signature
-            // and that call signature is non-generic, return statements are contextually typed by the return type of the signature
-            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
-            if (signature) {
-                return getReturnTypeOfSignature(signature);
-            }
-            return undefined;
-        }
-        // In a typed function call, an argument or substitution expression is contextually typed by the type of the corresponding parameter.
-        function getContextualTypeForArgument(callTarget, arg) {
-            var args = getEffectiveCallArguments(callTarget);
-            var argIndex = ts.indexOf(args, arg);
-            if (argIndex >= 0) {
-                var signature = getResolvedOrAnySignature(callTarget);
-                return getTypeAtPosition(signature, argIndex);
-            }
-            return undefined;
-        }
-        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
-            if (template.parent.kind === 176 /* TaggedTemplateExpression */) {
-                return getContextualTypeForArgument(template.parent, substitutionExpression);
-            }
-            return undefined;
-        }
-        function getContextualTypeForBinaryOperand(node) {
-            var binaryExpression = node.parent;
-            var operator = binaryExpression.operatorToken.kind;
-            if (operator >= 56 /* FirstAssignment */ && operator <= 68 /* LastAssignment */) {
-                // In an assignment expression, the right operand is contextually typed by the type of the left operand.
-                if (node === binaryExpression.right) {
-                    return checkExpression(binaryExpression.left);
-                }
-            }
-            else if (operator === 52 /* BarBarToken */) {
-                // When an || expression has a contextual type, the operands are contextually typed by that type. When an ||
-                // expression has no contextual type, the right operand is contextually typed by the type of the left operand.
-                var type = getContextualType(binaryExpression);
-                if (!type && node === binaryExpression.right) {
-                    type = checkExpression(binaryExpression.left);
-                }
-                return type;
-            }
-            else if (operator === 51 /* AmpersandAmpersandToken */ || operator === 24 /* CommaToken */) {
-                if (node === binaryExpression.right) {
-                    return getContextualType(binaryExpression);
-                }
-            }
-            return undefined;
-        }
-        // Apply a mapping function to a contextual type and return the resulting type. If the contextual type
-        // is a union type, the mapping function is applied to each constituent type and a union of the resulting
-        // types is returned.
-        function applyToContextualType(type, mapper) {
-            if (!(type.flags & 16384 /* Union */)) {
-                return mapper(type);
-            }
-            var types = type.types;
-            var mappedType;
-            var mappedTypes;
-            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
-                var current = types_8[_i];
-                var t = mapper(current);
-                if (t) {
-                    if (!mappedType) {
-                        mappedType = t;
-                    }
-                    else if (!mappedTypes) {
-                        mappedTypes = [mappedType, t];
-                    }
-                    else {
-                        mappedTypes.push(t);
-                    }
-                }
-            }
-            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
-        }
-        function getTypeOfPropertyOfContextualType(type, name) {
-            return applyToContextualType(type, function (t) {
-                var prop = t.flags & 130048 /* StructuredType */ ? getPropertyOfType(t, name) : undefined;
-                return prop ? getTypeOfSymbol(prop) : undefined;
-            });
-        }
-        function getIndexTypeOfContextualType(type, kind) {
-            return applyToContextualType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
-        }
-        function contextualTypeIsStringLiteralType(type) {
-            return !!(type.flags & 16384 /* Union */ ? ts.forEach(type.types, isStringLiteralType) : isStringLiteralType(type));
-        }
-        // Return true if the given contextual type is a tuple-like type
-        function contextualTypeIsTupleLikeType(type) {
-            return !!(type.flags & 16384 /* Union */ ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
-        }
-        // In an object literal contextually typed by a type T, the contextual type of a property assignment is the type of
-        // the matching property in T, if one exists. Otherwise, it is the type of the numeric index signature in T, if one
-        // exists. Otherwise, it is the type of the string index signature in T, if one exists.
-        function getContextualTypeForObjectLiteralMethod(node) {
-            ts.Debug.assert(ts.isObjectLiteralMethod(node));
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return undefined;
-            }
-            return getContextualTypeForObjectLiteralElement(node);
-        }
-        function getContextualTypeForObjectLiteralElement(element) {
-            var objectLiteral = element.parent;
-            var type = getApparentTypeOfContextualType(objectLiteral);
-            if (type) {
-                if (!ts.hasDynamicName(element)) {
-                    // For a (non-symbol) computed property, there is no reason to look up the name
-                    // in the type. It will just be "__computed", which does not appear in any
-                    // SymbolTable.
-                    var symbolName = getSymbolOfNode(element).name;
-                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
-                    if (propertyType) {
-                        return propertyType;
-                    }
-                }
-                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1 /* Number */) ||
-                    getIndexTypeOfContextualType(type, 0 /* String */);
-            }
-            return undefined;
-        }
-        // In an array literal contextually typed by a type T, the contextual type of an element expression at index N is
-        // the type of the property with the numeric name N in T, if one exists. Otherwise, if T has a numeric index signature,
-        // it is the type of the numeric index signature in T. Otherwise, in ES6 and higher, the contextual type is the iterated
-        // type of T.
-        function getContextualTypeForElementExpression(node) {
-            var arrayLiteral = node.parent;
-            var type = getApparentTypeOfContextualType(arrayLiteral);
-            if (type) {
-                var index = ts.indexOf(arrayLiteral.elements, node);
-                return getTypeOfPropertyOfContextualType(type, "" + index)
-                    || getIndexTypeOfContextualType(type, 1 /* Number */)
-                    || (languageVersion >= 2 /* ES6 */ ? getElementTypeOfIterable(type, /*errorNode*/ undefined) : undefined);
-            }
-            return undefined;
-        }
-        // In a contextually typed conditional expression, the true/false expressions are contextually typed by the same type.
-        function getContextualTypeForConditionalOperand(node) {
-            var conditional = node.parent;
-            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
-        }
-        function getContextualTypeForJsxAttribute(attribute) {
-            var kind = attribute.kind;
-            var jsxElement = attribute.parent;
-            var attrsType = getJsxElementAttributesType(jsxElement);
-            if (attribute.kind === 246 /* JsxAttribute */) {
-                if (!attrsType || isTypeAny(attrsType)) {
-                    return undefined;
-                }
-                return getTypeOfPropertyOfType(attrsType, attribute.name.text);
-            }
-            else if (attribute.kind === 247 /* JsxSpreadAttribute */) {
-                return attrsType;
-            }
-            ts.Debug.fail("Expected JsxAttribute or JsxSpreadAttribute, got ts.SyntaxKind[" + kind + "]");
-        }
-        // Return the contextual type for a given expression node. During overload resolution, a contextual type may temporarily
-        // be "pushed" onto a node using the contextualType property.
-        function getApparentTypeOfContextualType(node) {
-            var type = getContextualType(node);
-            return type && getApparentType(type);
-        }
-        /**
-         * Woah! Do you really want to use this function?
-         *
-         * Unless you're trying to get the *non-apparent* type for a
-         * value-literal type or you're authoring relevant portions of this algorithm,
-         * you probably meant to use 'getApparentTypeOfContextualType'.
-         * Otherwise this may not be very useful.
-         *
-         * In cases where you *are* working on this function, you should understand
-         * when it is appropriate to use 'getContextualType' and 'getApparentTypeOfContextualType'.
-         *
-         *   - Use 'getContextualType' when you are simply going to propagate the result to the expression.
-         *   - Use 'getApparentTypeOfContextualType' when you're going to need the members of the type.
-         *
-         * @param node the expression whose contextual type will be returned.
-         * @returns the contextual type of an expression.
-         */
-        function getContextualType(node) {
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return undefined;
-            }
-            if (node.contextualType) {
-                return node.contextualType;
-            }
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 218 /* VariableDeclaration */:
-                case 142 /* Parameter */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 169 /* BindingElement */:
-                    return getContextualTypeForInitializerExpression(node);
-                case 180 /* ArrowFunction */:
-                case 211 /* ReturnStatement */:
-                    return getContextualTypeForReturnExpression(node);
-                case 190 /* YieldExpression */:
-                    return getContextualTypeForYieldOperand(parent);
-                case 174 /* CallExpression */:
-                case 175 /* NewExpression */:
-                    return getContextualTypeForArgument(parent, node);
-                case 177 /* TypeAssertionExpression */:
-                case 195 /* AsExpression */:
-                    return getTypeFromTypeNode(parent.type);
-                case 187 /* BinaryExpression */:
-                    return getContextualTypeForBinaryOperand(node);
-                case 253 /* PropertyAssignment */:
-                    return getContextualTypeForObjectLiteralElement(parent);
-                case 170 /* ArrayLiteralExpression */:
-                    return getContextualTypeForElementExpression(node);
-                case 188 /* ConditionalExpression */:
-                    return getContextualTypeForConditionalOperand(node);
-                case 197 /* TemplateSpan */:
-                    ts.Debug.assert(parent.parent.kind === 189 /* TemplateExpression */);
-                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
-                case 178 /* ParenthesizedExpression */:
-                    return getContextualType(parent);
-                case 248 /* JsxExpression */:
-                    return getContextualType(parent);
-                case 246 /* JsxAttribute */:
-                case 247 /* JsxSpreadAttribute */:
-                    return getContextualTypeForJsxAttribute(parent);
-            }
-            return undefined;
-        }
-        // If the given type is an object or union type, if that type has a single signature, and if
-        // that signature is non-generic, return the signature. Otherwise return undefined.
-        function getNonGenericSignature(type) {
-            var signatures = getSignaturesOfStructuredType(type, 0 /* Call */);
-            if (signatures.length === 1) {
-                var signature = signatures[0];
-                if (!signature.typeParameters) {
-                    return signature;
-                }
-            }
-        }
-        function isFunctionExpressionOrArrowFunction(node) {
-            return node.kind === 179 /* FunctionExpression */ || node.kind === 180 /* ArrowFunction */;
-        }
-        function getContextualSignatureForFunctionLikeDeclaration(node) {
-            // Only function expressions, arrow functions, and object literal methods are contextually typed.
-            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
-                ? getContextualSignature(node)
-                : undefined;
-        }
-        function getContextualTypeForFunctionLikeDeclaration(node) {
-            return ts.isObjectLiteralMethod(node) ?
-                getContextualTypeForObjectLiteralMethod(node) :
-                getApparentTypeOfContextualType(node);
-        }
-        // Return the contextual signature for a given expression node. A contextual type provides a
-        // contextual signature if it has a single call signature and if that call signature is non-generic.
-        // If the contextual type is a union type, get the signature from each type possible and if they are
-        // all identical ignoring their return type, the result is same signature but with return type as
-        // union type of return types from these signatures
-        function getContextualSignature(node) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            var type = getContextualTypeForFunctionLikeDeclaration(node);
-            if (!type) {
-                return undefined;
-            }
-            if (!(type.flags & 16384 /* Union */)) {
-                return getNonGenericSignature(type);
-            }
-            var signatureList;
-            var types = type.types;
-            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
-                var current = types_9[_i];
-                var signature = getNonGenericSignature(current);
-                if (signature) {
-                    if (!signatureList) {
-                        // This signature will contribute to contextual union signature
-                        signatureList = [signature];
-                    }
-                    else if (!compareSignaturesIdentical(signatureList[0], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true, compareTypesIdentical)) {
-                        // Signatures aren't identical, do not use
-                        return undefined;
-                    }
-                    else {
-                        // Use this signature for contextual union signature
-                        signatureList.push(signature);
-                    }
-                }
-            }
-            // Result is union of signatures collected (return type is union of return types of this signature set)
-            var result;
-            if (signatureList) {
-                result = cloneSignature(signatureList[0]);
-                // Clear resolved return type we possibly got from cloneSignature
-                result.resolvedReturnType = undefined;
-                result.unionSignatures = signatureList;
-            }
-            return result;
-        }
-        /**
-         * Detect if the mapper implies an inference context. Specifically, there are 4 possible values
-         * for a mapper. Let's go through each one of them:
-         *
-         *    1. undefined - this means we are not doing inferential typing, but we may do contextual typing,
-         *       which could cause us to assign a parameter a type
-         *    2. identityMapper - means we want to avoid assigning a parameter a type, whether or not we are in
-         *       inferential typing (context is undefined for the identityMapper)
-         *    3. a mapper created by createInferenceMapper - we are doing inferential typing, we want to assign
-         *       types to parameters and fix type parameters (context is defined)
-         *    4. an instantiation mapper created by createTypeMapper or createTypeEraser - this should never be
-         *       passed as the contextual mapper when checking an expression (context is undefined for these)
-         *
-         * isInferentialContext is detecting if we are in case 3
-         */
-        function isInferentialContext(mapper) {
-            return mapper && mapper.context;
-        }
-        function checkSpreadElementExpression(node, contextualMapper) {
-            // It is usually not safe to call checkExpressionCached if we can be contextually typing.
-            // You can tell that we are contextually typing because of the contextualMapper parameter.
-            // While it is true that a spread element can have a contextual type, it does not do anything
-            // with this type. It is neither affected by it, nor does it propagate it to its operand.
-            // So the fact that contextualMapper is passed is not important, because the operand of a spread
-            // element is not contextually typed.
-            var arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
-            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, /*allowStringInput*/ false);
-        }
-        function hasDefaultValue(node) {
-            return (node.kind === 169 /* BindingElement */ && !!node.initializer) ||
-                (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 56 /* EqualsToken */);
-        }
-        function checkArrayLiteral(node, contextualMapper) {
-            var elements = node.elements;
-            var hasSpreadElement = false;
-            var elementTypes = [];
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
-            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
-                var e = elements_1[_i];
-                if (inDestructuringPattern && e.kind === 191 /* SpreadElementExpression */) {
-                    // Given the following situation:
-                    //    var c: {};
-                    //    [...c] = ["", 0];
-                    //
-                    // c is represented in the tree as a spread element in an array literal.
-                    // But c really functions as a rest element, and its purpose is to provide
-                    // a contextual type for the right hand side of the assignment. Therefore,
-                    // instead of calling checkExpression on "...c", which will give an error
-                    // if c is not iterable/array-like, we need to act as if we are trying to
-                    // get the contextual element type from it. So we do something similar to
-                    // getContextualTypeForElementExpression, which will crucially not error
-                    // if there is no index type / iterated type.
-                    var restArrayType = checkExpression(e.expression, contextualMapper);
-                    var restElementType = getIndexTypeOfType(restArrayType, 1 /* Number */) ||
-                        (languageVersion >= 2 /* ES6 */ ? getElementTypeOfIterable(restArrayType, /*errorNode*/ undefined) : undefined);
-                    if (restElementType) {
-                        elementTypes.push(restElementType);
-                    }
-                }
-                else {
-                    var type = checkExpression(e, contextualMapper);
-                    elementTypes.push(type);
-                }
-                hasSpreadElement = hasSpreadElement || e.kind === 191 /* SpreadElementExpression */;
-            }
-            if (!hasSpreadElement) {
-                // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
-                // that we get the same behavior for "var [x, y] = []" and "[x, y] = []".
-                if (inDestructuringPattern && elementTypes.length) {
-                    var type = createNewTupleType(elementTypes);
-                    type.pattern = node;
-                    return type;
-                }
-                var contextualType = getApparentTypeOfContextualType(node);
-                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
-                    var pattern = contextualType.pattern;
-                    // If array literal is contextually typed by a binding pattern or an assignment pattern, pad the resulting
-                    // tuple type with the corresponding binding or assignment element types to make the lengths equal.
-                    if (pattern && (pattern.kind === 168 /* ArrayBindingPattern */ || pattern.kind === 170 /* ArrayLiteralExpression */)) {
-                        var patternElements = pattern.elements;
-                        for (var i = elementTypes.length; i < patternElements.length; i++) {
-                            var patternElement = patternElements[i];
-                            if (hasDefaultValue(patternElement)) {
-                                elementTypes.push(contextualType.elementTypes[i]);
-                            }
-                            else {
-                                if (patternElement.kind !== 193 /* OmittedExpression */) {
-                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
-                                }
-                                elementTypes.push(unknownType);
-                            }
-                        }
-                    }
-                    if (elementTypes.length) {
-                        return createTupleType(elementTypes);
-                    }
-                }
-            }
-            return createArrayType(elementTypes.length ? getUnionType(elementTypes) : emptyArrayElementType);
-        }
-        function isNumericName(name) {
-            return name.kind === 140 /* ComputedPropertyName */ ? isNumericComputedName(name) : isNumericLiteralName(name.text);
-        }
-        function isNumericComputedName(name) {
-            // It seems odd to consider an expression of type Any to result in a numeric name,
-            // but this behavior is consistent with checkIndexedAccess
-            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 132 /* NumberLike */);
-        }
-        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
-            return isTypeAny(type) || isTypeOfKind(type, kind);
-        }
-        function isNumericLiteralName(name) {
-            // The intent of numeric names is that
-            //     - they are names with text in a numeric form, and that
-            //     - setting properties/indexing with them is always equivalent to doing so with the numeric literal 'numLit',
-            //         acquired by applying the abstract 'ToNumber' operation on the name's text.
-            //
-            // The subtlety is in the latter portion, as we cannot reliably say that anything that looks like a numeric literal is a numeric name.
-            // In fact, it is the case that the text of the name must be equal to 'ToString(numLit)' for this to hold.
-            //
-            // Consider the property name '"0xF00D"'. When one indexes with '0xF00D', they are actually indexing with the value of 'ToString(0xF00D)'
-            // according to the ECMAScript specification, so it is actually as if the user indexed with the string '"61453"'.
-            // Thus, the text of all numeric literals equivalent to '61543' such as '0xF00D', '0xf00D', '0170015', etc. are not valid numeric names
-            // because their 'ToString' representation is not equal to their original text.
-            // This is motivated by ECMA-262 sections 9.3.1, 9.8.1, 11.1.5, and 11.2.1.
-            //
-            // Here, we test whether 'ToString(ToNumber(name))' is exactly equal to 'name'.
-            // The '+' prefix operator is equivalent here to applying the abstract ToNumber operation.
-            // Applying the 'toString()' method on a number gives us the abstract ToString operation on a number.
-            //
-            // Note that this accepts the values 'Infinity', '-Infinity', and 'NaN', and that this is intentional.
-            // This is desired behavior, because when indexing with them as numeric entities, you are indexing
-            // with the strings '"Infinity"', '"-Infinity"', and '"NaN"' respectively.
-            return (+name).toString() === name;
-        }
-        function checkComputedPropertyName(node) {
-            var links = getNodeLinks(node.expression);
-            if (!links.resolvedType) {
-                links.resolvedType = checkExpression(node.expression);
-                // This will allow types number, string, symbol or any. It will also allow enums, the unknown
-                // type, and any union of these types (like string | number).
-                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 132 /* NumberLike */ | 258 /* StringLike */ | 16777216 /* ESSymbol */)) {
-                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
-                }
-                else {
-                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, /*reportError*/ true);
-                }
-            }
-            return links.resolvedType;
-        }
-        function getObjectLiteralIndexInfo(node, properties, kind) {
-            var propTypes = [];
-            for (var i = 0; i < properties.length; i++) {
-                if (kind === 0 /* String */ || isNumericName(node.properties[i].name)) {
-                    propTypes.push(getTypeOfSymbol(properties[i]));
-                }
-            }
-            var unionType = propTypes.length ? getUnionType(propTypes) : undefinedType;
-            return createIndexInfo(unionType, /*isReadonly*/ false);
-        }
-        function checkObjectLiteral(node, contextualMapper) {
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
-            // Grammar checking
-            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
-            var propertiesTable = {};
-            var propertiesArray = [];
-            var contextualType = getApparentTypeOfContextualType(node);
-            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
-                (contextualType.pattern.kind === 167 /* ObjectBindingPattern */ || contextualType.pattern.kind === 171 /* ObjectLiteralExpression */);
-            var typeFlags = 0;
-            var patternWithComputedProperties = false;
-            var hasComputedStringProperty = false;
-            var hasComputedNumberProperty = false;
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var memberDecl = _a[_i];
-                var member = memberDecl.symbol;
-                if (memberDecl.kind === 253 /* PropertyAssignment */ ||
-                    memberDecl.kind === 254 /* ShorthandPropertyAssignment */ ||
-                    ts.isObjectLiteralMethod(memberDecl)) {
-                    var type = void 0;
-                    if (memberDecl.kind === 253 /* PropertyAssignment */) {
-                        type = checkPropertyAssignment(memberDecl, contextualMapper);
-                    }
-                    else if (memberDecl.kind === 147 /* MethodDeclaration */) {
-                        type = checkObjectLiteralMethod(memberDecl, contextualMapper);
-                    }
-                    else {
-                        ts.Debug.assert(memberDecl.kind === 254 /* ShorthandPropertyAssignment */);
-                        type = checkExpression(memberDecl.name, contextualMapper);
-                    }
-                    typeFlags |= type.flags;
-                    var prop = createSymbol(4 /* Property */ | 67108864 /* Transient */ | member.flags, member.name);
-                    if (inDestructuringPattern) {
-                        // If object literal is an assignment pattern and if the assignment pattern specifies a default value
-                        // for the property, make the property optional.
-                        var isOptional = (memberDecl.kind === 253 /* PropertyAssignment */ && hasDefaultValue(memberDecl.initializer)) ||
-                            (memberDecl.kind === 254 /* ShorthandPropertyAssignment */ && memberDecl.objectAssignmentInitializer);
-                        if (isOptional) {
-                            prop.flags |= 536870912 /* Optional */;
-                        }
-                        if (ts.hasDynamicName(memberDecl)) {
-                            patternWithComputedProperties = true;
-                        }
-                    }
-                    else if (contextualTypeHasPattern && !(contextualType.flags & 67108864 /* ObjectLiteralPatternWithComputedProperties */)) {
-                        // If object literal is contextually typed by the implied type of a binding pattern, and if the
-                        // binding pattern specifies a default value for the property, make the property optional.
-                        var impliedProp = getPropertyOfType(contextualType, member.name);
-                        if (impliedProp) {
-                            prop.flags |= impliedProp.flags & 536870912 /* Optional */;
-                        }
-                        else if (!compilerOptions.suppressExcessPropertyErrors) {
-                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
-                        }
-                    }
-                    prop.declarations = member.declarations;
-                    prop.parent = member.parent;
-                    if (member.valueDeclaration) {
-                        prop.valueDeclaration = member.valueDeclaration;
-                    }
-                    prop.type = type;
-                    prop.target = member;
-                    member = prop;
-                }
-                else {
-                    // TypeScript 1.0 spec (April 2014)
-                    // A get accessor declaration is processed in the same manner as
-                    // an ordinary function declaration(section 6.1) with no parameters.
-                    // A set accessor declaration is processed in the same manner
-                    // as an ordinary function declaration with a single parameter and a Void return type.
-                    ts.Debug.assert(memberDecl.kind === 149 /* GetAccessor */ || memberDecl.kind === 150 /* SetAccessor */);
-                    checkAccessorDeclaration(memberDecl);
-                }
-                if (ts.hasDynamicName(memberDecl)) {
-                    if (isNumericName(memberDecl.name)) {
-                        hasComputedNumberProperty = true;
-                    }
-                    else {
-                        hasComputedStringProperty = true;
-                    }
-                }
-                else {
-                    propertiesTable[member.name] = member;
-                }
-                propertiesArray.push(member);
-            }
-            // If object literal is contextually typed by the implied type of a binding pattern, augment the result
-            // type with those properties for which the binding pattern specifies a default value.
-            if (contextualTypeHasPattern) {
-                for (var _b = 0, _c = getPropertiesOfType(contextualType); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    if (!ts.hasProperty(propertiesTable, prop.name)) {
-                        if (!(prop.flags & 536870912 /* Optional */)) {
-                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
-                        }
-                        propertiesTable[prop.name] = prop;
-                        propertiesArray.push(prop);
-                    }
-                }
-            }
-            var stringIndexInfo = hasComputedStringProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 0 /* String */) : undefined;
-            var numberIndexInfo = hasComputedNumberProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 1 /* Number */) : undefined;
-            var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
-            var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576 /* FreshObjectLiteral */;
-            result.flags |= 524288 /* ObjectLiteral */ | 4194304 /* ContainsObjectLiteral */ | freshObjectLiteralFlag | (typeFlags & 14680064 /* PropagatingFlags */) | (patternWithComputedProperties ? 67108864 /* ObjectLiteralPatternWithComputedProperties */ : 0);
-            if (inDestructuringPattern) {
-                result.pattern = node;
-            }
-            return result;
-        }
-        function checkJsxSelfClosingElement(node) {
-            checkJsxOpeningLikeElement(node);
-            return jsxElementType || anyType;
-        }
-        function checkJsxElement(node) {
-            // Check attributes
-            checkJsxOpeningLikeElement(node.openingElement);
-            // Perform resolution on the closing tag so that rename/go to definition/etc work
-            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
-                getIntrinsicTagSymbol(node.closingElement);
-            }
-            else {
-                checkExpression(node.closingElement.tagName);
-            }
-            // Check children
-            for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
-                var child = _a[_i];
-                switch (child.kind) {
-                    case 248 /* JsxExpression */:
-                        checkJsxExpression(child);
-                        break;
-                    case 241 /* JsxElement */:
-                        checkJsxElement(child);
-                        break;
-                    case 242 /* JsxSelfClosingElement */:
-                        checkJsxSelfClosingElement(child);
-                        break;
-                }
-            }
-            return jsxElementType || anyType;
-        }
-        /**
-         * Returns true iff the JSX element name would be a valid JS identifier, ignoring restrictions about keywords not being identifiers
-         */
-        function isUnhyphenatedJsxName(name) {
-            // - is the only character supported in JSX attribute names that isn't valid in JavaScript identifiers
-            return name.indexOf("-") < 0;
-        }
-        /**
-         * Returns true iff React would emit this tag name as a string rather than an identifier or qualified name
-         */
-        function isJsxIntrinsicIdentifier(tagName) {
-            if (tagName.kind === 139 /* QualifiedName */) {
-                return false;
-            }
-            else {
-                return ts.isIntrinsicJsxName(tagName.text);
-            }
-        }
-        function checkJsxAttribute(node, elementAttributesType, nameTable) {
-            var correspondingPropType = undefined;
-            // Look up the corresponding property for this attribute
-            if (elementAttributesType === emptyObjectType && isUnhyphenatedJsxName(node.name.text)) {
-                // If there is no 'props' property, you may not have non-"data-" attributes
-                error(node.parent, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
-            }
-            else if (elementAttributesType && !isTypeAny(elementAttributesType)) {
-                var correspondingPropSymbol = getPropertyOfType(elementAttributesType, node.name.text);
-                correspondingPropType = correspondingPropSymbol && getTypeOfSymbol(correspondingPropSymbol);
-                if (isUnhyphenatedJsxName(node.name.text)) {
-                    // Maybe there's a string indexer?
-                    var indexerType = getIndexTypeOfType(elementAttributesType, 0 /* String */);
-                    if (indexerType) {
-                        correspondingPropType = indexerType;
-                    }
-                    else {
-                        // If there's no corresponding property with this name, error
-                        if (!correspondingPropType) {
-                            error(node.name, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.name.text, typeToString(elementAttributesType));
-                            return unknownType;
-                        }
-                    }
-                }
-            }
-            var exprType;
-            if (node.initializer) {
-                exprType = checkExpression(node.initializer);
-            }
-            else {
-                // <Elem attr /> is sugar for <Elem attr={true} />
-                exprType = booleanType;
-            }
-            if (correspondingPropType) {
-                checkTypeAssignableTo(exprType, correspondingPropType, node);
-            }
-            nameTable[node.name.text] = true;
-            return exprType;
-        }
-        function checkJsxSpreadAttribute(node, elementAttributesType, nameTable) {
-            var type = checkExpression(node.expression);
-            var props = getPropertiesOfType(type);
-            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
-                var prop = props_2[_i];
-                // Is there a corresponding property in the element attributes type? Skip checking of properties
-                // that have already been assigned to, as these are not actually pushed into the resulting type
-                if (!nameTable[prop.name]) {
-                    var targetPropSym = getPropertyOfType(elementAttributesType, prop.name);
-                    if (targetPropSym) {
-                        var msg = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property, prop.name);
-                        checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(targetPropSym), node, undefined, msg);
-                    }
-                    nameTable[prop.name] = true;
-                }
-            }
-            return type;
-        }
-        function getJsxType(name) {
-            if (jsxTypes[name] === undefined) {
-                return jsxTypes[name] = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType;
-            }
-            return jsxTypes[name];
-        }
-        /**
-          * Looks up an intrinsic tag name and returns a symbol that either points to an intrinsic
-          * property (in which case nodeLinks.jsxFlags will be IntrinsicNamedElement) or an intrinsic
-          * string index signature (in which case nodeLinks.jsxFlags will be IntrinsicIndexedElement).
-          * May also return unknownSymbol if both of these lookups fail.
-          */
-        function getIntrinsicTagSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
-                if (intrinsicElementsType !== unknownType) {
-                    // Property case
-                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
-                    if (intrinsicProp) {
-                        links.jsxFlags |= 1 /* IntrinsicNamedElement */;
-                        return links.resolvedSymbol = intrinsicProp;
-                    }
-                    // Intrinsic string indexer case
-                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
-                    if (indexSignatureType) {
-                        links.jsxFlags |= 2 /* IntrinsicIndexedElement */;
-                        return links.resolvedSymbol = intrinsicElementsType.symbol;
-                    }
-                    // Wasn't found
-                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
-                    return links.resolvedSymbol = unknownSymbol;
-                }
-                else {
-                    if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
-                    }
-                    return links.resolvedSymbol = unknownSymbol;
-                }
-            }
-            return links.resolvedSymbol;
-        }
-        /**
-         * Given a JSX element that is a class element, finds the Element Instance Type. If the
-         * element is not a class element, or the class element type cannot be determined, returns 'undefined'.
-         * For example, in the element <MyClass>, the element instance type is `MyClass` (not `typeof MyClass`).
-         */
-        function getJsxElementInstanceType(node, valueType) {
-            ts.Debug.assert(!(valueType.flags & 16384 /* Union */));
-            if (isTypeAny(valueType)) {
-                // Short-circuit if the class tag is using an element type 'any'
-                return anyType;
-            }
-            // Resolve the signatures, preferring constructor
-            var signatures = getSignaturesOfType(valueType, 1 /* Construct */);
-            if (signatures.length === 0) {
-                // No construct signatures, try call signatures
-                signatures = getSignaturesOfType(valueType, 0 /* Call */);
-                if (signatures.length === 0) {
-                    // We found no signatures at all, which is an error
-                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
-                    return unknownType;
-                }
-            }
-            return getUnionType(signatures.map(getReturnTypeOfSignature));
-        }
-        /// e.g. "props" for React.d.ts,
-        /// or 'undefined' if ElementAttributesProperty doesn't exist (which means all
-        ///     non-intrinsic elements' attributes type is 'any'),
-        /// or '' if it has 0 properties (which means every
-        ///     non-intrinsic elements' attributes type is the element instance type)
-        function getJsxElementPropertiesName() {
-            // JSX
-            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1536 /* Namespace */, /*diagnosticMessage*/ undefined);
-            // JSX.ElementAttributesProperty [symbol]
-            var attribsPropTypeSym = jsxNamespace && getSymbol(jsxNamespace.exports, JsxNames.ElementAttributesPropertyNameContainer, 793056 /* Type */);
-            // JSX.ElementAttributesProperty [type]
-            var attribPropType = attribsPropTypeSym && getDeclaredTypeOfSymbol(attribsPropTypeSym);
-            // The properties of JSX.ElementAttributesProperty
-            var attribProperties = attribPropType && getPropertiesOfType(attribPropType);
-            if (attribProperties) {
-                // Element Attributes has zero properties, so the element attributes type will be the class instance type
-                if (attribProperties.length === 0) {
-                    return "";
-                }
-                else if (attribProperties.length === 1) {
-                    return attribProperties[0].name;
-                }
-                else {
-                    error(attribsPropTypeSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, JsxNames.ElementAttributesPropertyNameContainer);
-                    return undefined;
-                }
-            }
-            else {
-                // No interface exists, so the element attributes type will be an implicit any
-                return undefined;
-            }
-        }
-        /**
-         * Given React element instance type and the class type, resolve the Jsx type
-         * Pass elemType to handle individual type in the union typed element type.
-         */
-        function getResolvedJsxType(node, elemType, elemClassType) {
-            if (!elemType) {
-                elemType = checkExpression(node.tagName);
-            }
-            if (elemType.flags & 16384 /* Union */) {
-                var types = elemType.types;
-                return getUnionType(types.map(function (type) {
-                    return getResolvedJsxType(node, type, elemClassType);
-                }));
-            }
-            // Get the element instance type (the result of newing or invoking this tag)
-            var elemInstanceType = getJsxElementInstanceType(node, elemType);
-            if (!elemClassType || !isTypeAssignableTo(elemInstanceType, elemClassType)) {
-                // Is this is a stateless function component? See if its single signature's return type is
-                // assignable to the JSX Element Type
-                if (jsxElementType) {
-                    var callSignatures = elemType && getSignaturesOfType(elemType, 0 /* Call */);
-                    var callSignature = callSignatures && callSignatures.length > 0 && callSignatures[0];
-                    var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
-                    var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
-                    if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType)) {
-                        // Intersect in JSX.IntrinsicAttributes if it exists
-                        var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
-                        if (intrinsicAttributes !== unknownType) {
-                            paramType = intersectTypes(intrinsicAttributes, paramType);
-                        }
-                        return paramType;
-                    }
-                }
-            }
-            // Issue an error if this return type isn't assignable to JSX.ElementClass
-            if (elemClassType) {
-                checkTypeRelatedTo(elemInstanceType, elemClassType, assignableRelation, node, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
-            }
-            if (isTypeAny(elemInstanceType)) {
-                return elemInstanceType;
-            }
-            var propsName = getJsxElementPropertiesName();
-            if (propsName === undefined) {
-                // There is no type ElementAttributesProperty, return 'any'
-                return anyType;
-            }
-            else if (propsName === "") {
-                // If there is no e.g. 'props' member in ElementAttributesProperty, use the element class type instead
-                return elemInstanceType;
-            }
-            else {
-                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
-                if (!attributesType) {
-                    // There is no property named 'props' on this instance type
-                    return emptyObjectType;
-                }
-                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
-                    // Props is of type 'any' or unknown
-                    return attributesType;
-                }
-                else if (attributesType.flags & 16384 /* Union */) {
-                    // Props cannot be a union type
-                    error(node.tagName, ts.Diagnostics.JSX_element_attributes_type_0_may_not_be_a_union_type, typeToString(attributesType));
-                    return anyType;
-                }
-                else {
-                    // Normal case -- add in IntrinsicClassElements<T> and IntrinsicElements
-                    var apparentAttributesType = attributesType;
-                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
-                    if (intrinsicClassAttribs !== unknownType) {
-                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
-                        if (typeParams) {
-                            if (typeParams.length === 1) {
-                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
-                            }
-                        }
-                        else {
-                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
-                        }
-                    }
-                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
-                    if (intrinsicAttribs !== unknownType) {
-                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
-                    }
-                    return apparentAttributesType;
-                }
-            }
-        }
-        /**
-         * Given an opening/self-closing element, get the 'element attributes type', i.e. the type that tells
-         * us which attributes are valid on a given element.
-         */
-        function getJsxElementAttributesType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedJsxType) {
-                if (isJsxIntrinsicIdentifier(node.tagName)) {
-                    var symbol = getIntrinsicTagSymbol(node);
-                    if (links.jsxFlags & 1 /* IntrinsicNamedElement */) {
-                        return links.resolvedJsxType = getTypeOfSymbol(symbol);
-                    }
-                    else if (links.jsxFlags & 2 /* IntrinsicIndexedElement */) {
-                        return links.resolvedJsxType = getIndexInfoOfSymbol(symbol, 0 /* String */).type;
-                    }
-                    else {
-                        return links.resolvedJsxType = unknownType;
-                    }
-                }
-                else {
-                    var elemClassType = getJsxGlobalElementClassType();
-                    return links.resolvedJsxType = getResolvedJsxType(node, undefined, elemClassType);
-                }
-            }
-            return links.resolvedJsxType;
-        }
-        /**
-         * Given a JSX attribute, returns the symbol for the corresponds property
-         * of the element attributes type. Will return unknownSymbol for attributes
-         * that have no matching element attributes type property.
-         */
-        function getJsxAttributePropertySymbol(attrib) {
-            var attributesType = getJsxElementAttributesType(attrib.parent);
-            var prop = getPropertyOfType(attributesType, attrib.name.text);
-            return prop || unknownSymbol;
-        }
-        function getJsxGlobalElementClassType() {
-            if (!jsxElementClassType) {
-                jsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
-            }
-            return jsxElementClassType;
-        }
-        /// Returns all the properties of the Jsx.IntrinsicElements interface
-        function getJsxIntrinsicTagNames() {
-            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
-            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
-        }
-        function checkJsxPreconditions(errorNode) {
-            // Preconditions for using JSX
-            if ((compilerOptions.jsx || 0 /* None */) === 0 /* None */) {
-                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
-            }
-            if (jsxElementType === undefined) {
-                if (compilerOptions.noImplicitAny) {
-                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
-                }
-            }
-        }
-        function checkJsxOpeningLikeElement(node) {
-            checkGrammarJsxElement(node);
-            checkJsxPreconditions(node);
-            // The reactNamespace symbol should be marked as 'used' so we don't incorrectly elide its import. And if there
-            // is no reactNamespace symbol in scope when targeting React emit, we should issue an error.
-            var reactRefErr = compilerOptions.jsx === 2 /* React */ ? ts.Diagnostics.Cannot_find_name_0 : undefined;
-            var reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
-            var reactSym = resolveName(node.tagName, reactNamespace, 107455 /* Value */, reactRefErr, reactNamespace);
-            if (reactSym) {
-                getSymbolLinks(reactSym).referenced = true;
-            }
-            var targetAttributesType = getJsxElementAttributesType(node);
-            var nameTable = {};
-            // Process this array in right-to-left order so we know which
-            // attributes (mostly from spreads) are being overwritten and
-            // thus should have their types ignored
-            var sawSpreadedAny = false;
-            for (var i = node.attributes.length - 1; i >= 0; i--) {
-                if (node.attributes[i].kind === 246 /* JsxAttribute */) {
-                    checkJsxAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                }
-                else {
-                    ts.Debug.assert(node.attributes[i].kind === 247 /* JsxSpreadAttribute */);
-                    var spreadType = checkJsxSpreadAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                    if (isTypeAny(spreadType)) {
-                        sawSpreadedAny = true;
-                    }
-                }
-            }
-            // Check that all required properties have been provided. If an 'any'
-            // was spreaded in, though, assume that it provided all required properties
-            if (targetAttributesType && !sawSpreadedAny) {
-                var targetProperties = getPropertiesOfType(targetAttributesType);
-                for (var i = 0; i < targetProperties.length; i++) {
-                    if (!(targetProperties[i].flags & 536870912 /* Optional */) &&
-                        nameTable[targetProperties[i].name] === undefined) {
-                        error(node, ts.Diagnostics.Property_0_is_missing_in_type_1, targetProperties[i].name, typeToString(targetAttributesType));
-                    }
-                }
-            }
-        }
-        function checkJsxExpression(node) {
-            if (node.expression) {
-                return checkExpression(node.expression);
-            }
-            else {
-                return unknownType;
-            }
-        }
-        // If a symbol is a synthesized symbol with no value declaration, we assume it is a property. Example of this are the synthesized
-        // '.prototype' property as well as synthesized tuple index properties.
-        function getDeclarationKindFromSymbol(s) {
-            return s.valueDeclaration ? s.valueDeclaration.kind : 145 /* PropertyDeclaration */;
-        }
-        function getDeclarationFlagsFromSymbol(s) {
-            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : s.flags & 134217728 /* Prototype */ ? 4 /* Public */ | 32 /* Static */ : 0;
-        }
-        /**
-         * Check whether the requested property access is valid.
-         * Returns true if node is a valid property access, and false otherwise.
-         * @param node The node to be checked.
-         * @param left The left hand side of the property access (e.g.: the super in `super.foo`).
-         * @param type The type of left.
-         * @param prop The symbol for the right hand side of the property access.
-         */
-        function checkClassPropertyAccess(node, left, type, prop) {
-            var flags = getDeclarationFlagsFromSymbol(prop);
-            var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop));
-            var errorNode = node.kind === 172 /* PropertyAccessExpression */ || node.kind === 218 /* VariableDeclaration */ ?
-                node.name :
-                node.right;
-            if (left.kind === 95 /* SuperKeyword */) {
-                // TS 1.0 spec (April 2014): 4.8.2
-                // - In a constructor, instance member function, instance member accessor, or
-                //   instance member variable initializer where this references a derived class instance,
-                //   a super property access is permitted and must specify a public instance member function of the base class.
-                // - In a static member function or static member accessor
-                //   where this references the constructor function object of a derived class,
-                //   a super property access is permitted and must specify a public static member function of the base class.
-                if (languageVersion < 2 /* ES6 */ && getDeclarationKindFromSymbol(prop) !== 147 /* MethodDeclaration */) {
-                    // `prop` refers to a *property* declared in the super class
-                    // rather than a *method*, so it does not satisfy the above criteria.
-                    error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
-                    return false;
-                }
-                if (flags & 128 /* Abstract */) {
-                    // A method cannot be accessed in a super property access if the method is abstract.
-                    // This error could mask a private property access error. But, a member
-                    // cannot simultaneously be private and abstract, so this will trigger an
-                    // additional error elsewhere.
-                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-            }
-            // Public properties are otherwise accessible.
-            if (!(flags & (8 /* Private */ | 16 /* Protected */))) {
-                return true;
-            }
-            // Property is known to be private or protected at this point
-            // Private property is accessible if the property is within the declaring class
-            if (flags & 8 /* Private */) {
-                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
-                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-                return true;
-            }
-            // Property is known to be protected at this point
-            // All protected properties of a supertype are accessible in a super access
-            if (left.kind === 95 /* SuperKeyword */) {
-                return true;
-            }
-            // Get the enclosing class that has the declaring class as its base type
-            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
-                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
-                return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined;
-            });
-            // A protected property is accessible if the property is within the declaring class or classes derived from it
-            if (!enclosingClass) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass));
-                return false;
-            }
-            // No further restrictions for static properties
-            if (flags & 32 /* Static */) {
-                return true;
-            }
-            // An instance property must be accessed through an instance of the enclosing class
-            if (type.flags & 33554432 /* ThisType */) {
-                // get the original type -- represented as the type constraint of the 'this' type
-                type = getConstraintOfTypeParameter(type);
-            }
-            // TODO: why is the first part of this check here?
-            if (!(getTargetType(type).flags & (1024 /* Class */ | 2048 /* Interface */) && hasBaseType(type, enclosingClass))) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
-                return false;
-            }
-            return true;
-        }
-        function checkNonNullExpression(node) {
-            var type = checkExpression(node);
-            if (strictNullChecks) {
-                var kind = getNullableKind(type);
-                if (kind) {
-                    error(node, kind & 32 /* Undefined */ ? kind & 64 /* Null */ ?
-                        ts.Diagnostics.Object_is_possibly_null_or_undefined :
-                        ts.Diagnostics.Object_is_possibly_undefined :
-                        ts.Diagnostics.Object_is_possibly_null);
-                }
-                return getNonNullableType(type);
-            }
-            return type;
-        }
-        function checkPropertyAccessExpression(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
-        }
-        function checkQualifiedName(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
-        }
-        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
-            var type = checkNonNullExpression(left);
-            if (isTypeAny(type)) {
-                return type;
-            }
-            var apparentType = getApparentType(getWidenedType(type));
-            if (apparentType === unknownType) {
-                // handle cases when type is Type parameter with invalid constraint
-                return unknownType;
-            }
-            var prop = getPropertyOfType(apparentType, right.text);
-            if (!prop) {
-                if (right.text) {
-                    error(right, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(right), typeToString(type.flags & 33554432 /* ThisType */ ? apparentType : type));
-                }
-                return unknownType;
-            }
-            getNodeLinks(node).resolvedSymbol = prop;
-            if (prop.parent && prop.parent.flags & 32 /* Class */) {
-                checkClassPropertyAccess(node, left, apparentType, prop);
-            }
-            var propType = getTypeOfSymbol(prop);
-            if (node.kind !== 172 /* PropertyAccessExpression */ || ts.isAssignmentTarget(node) ||
-                !(propType.flags & 16384 /* Union */) && !(prop.flags & (3 /* Variable */ | 4 /* Property */ | 98304 /* Accessor */))) {
-                return propType;
-            }
-            var leftmostNode = getLeftmostIdentifierOrThis(node);
-            if (!leftmostNode) {
-                return propType;
-            }
-            if (leftmostNode.kind === 69 /* Identifier */) {
-                var leftmostSymbol = getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(leftmostNode));
-                if (!leftmostSymbol) {
-                    return propType;
-                }
-                var declaration = leftmostSymbol.valueDeclaration;
-                if (!declaration || declaration.kind !== 218 /* VariableDeclaration */ && declaration.kind !== 142 /* Parameter */ && declaration.kind !== 169 /* BindingElement */) {
-                    return propType;
-                }
-            }
-            return getFlowTypeOfReference(node, propType, /*assumeInitialized*/ true);
-        }
-        function isValidPropertyAccess(node, propertyName) {
-            var left = node.kind === 172 /* PropertyAccessExpression */
-                ? node.expression
-                : node.left;
-            var type = checkExpression(left);
-            if (type !== unknownType && !isTypeAny(type)) {
-                var prop = getPropertyOfType(getWidenedType(type), propertyName);
-                if (prop && prop.parent && prop.parent.flags & 32 /* Class */) {
-                    return checkClassPropertyAccess(node, left, type, prop);
-                }
-            }
-            return true;
-        }
-        /**
-         * Return the symbol of the for-in variable declared or referenced by the given for-in statement.
-         */
-        function getForInVariableSymbol(node) {
-            var initializer = node.initializer;
-            if (initializer.kind === 219 /* VariableDeclarationList */) {
-                var variable = initializer.declarations[0];
-                if (variable && !ts.isBindingPattern(variable.name)) {
-                    return getSymbolOfNode(variable);
-                }
-            }
-            else if (initializer.kind === 69 /* Identifier */) {
-                return getResolvedSymbol(initializer);
-            }
-            return undefined;
-        }
-        /**
-         * Return true if the given type is considered to have numeric property names.
-         */
-        function hasNumericPropertyNames(type) {
-            return getIndexTypeOfType(type, 1 /* Number */) && !getIndexTypeOfType(type, 0 /* String */);
-        }
-        /**
-         * Return true if given node is an expression consisting of an identifier (possibly parenthesized)
-         * that references a for-in variable for an object with numeric property names.
-         */
-        function isForInVariableForNumericPropertyNames(expr) {
-            var e = skipParenthesizedNodes(expr);
-            if (e.kind === 69 /* Identifier */) {
-                var symbol = getResolvedSymbol(e);
-                if (symbol.flags & 3 /* Variable */) {
-                    var child = expr;
-                    var node = expr.parent;
-                    while (node) {
-                        if (node.kind === 207 /* ForInStatement */ &&
-                            child === node.statement &&
-                            getForInVariableSymbol(node) === symbol &&
-                            hasNumericPropertyNames(checkExpression(node.expression))) {
-                            return true;
-                        }
-                        child = node;
-                        node = node.parent;
-                    }
-                }
-            }
-            return false;
-        }
-        function checkIndexedAccess(node) {
-            // Grammar checking
-            if (!node.argumentExpression) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                if (node.parent.kind === 175 /* NewExpression */ && node.parent.expression === node) {
-                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
-                }
-                else {
-                    var start = node.end - "]".length;
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
-                }
-            }
-            // Obtain base constraint such that we can bail out if the constraint is an unknown type
-            var objectType = getApparentType(checkNonNullExpression(node.expression));
-            var indexType = node.argumentExpression ? checkExpression(node.argumentExpression) : unknownType;
-            if (objectType === unknownType) {
-                return unknownType;
-            }
-            var isConstEnum = isConstEnumObjectType(objectType);
-            if (isConstEnum &&
-                (!node.argumentExpression || node.argumentExpression.kind !== 9 /* StringLiteral */)) {
-                error(node.argumentExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
-                return unknownType;
-            }
-            // TypeScript 1.0 spec (April 2014): 4.10 Property Access
-            // - If IndexExpr is a string literal or a numeric literal and ObjExpr's apparent type has a property with the name
-            //    given by that literal(converted to its string representation in the case of a numeric literal), the property access is of the type of that property.
-            // - Otherwise, if ObjExpr's apparent type has a numeric index signature and IndexExpr is of type Any, the Number primitive type, or an enum type,
-            //    the property access is of the type of that index signature.
-            // - Otherwise, if ObjExpr's apparent type has a string index signature and IndexExpr is of type Any, the String or Number primitive type, or an enum type,
-            //    the property access is of the type of that index signature.
-            // - Otherwise, if IndexExpr is of type Any, the String or Number primitive type, or an enum type, the property access is of type Any.
-            // See if we can index as a property.
-            if (node.argumentExpression) {
-                var name_12 = getPropertyNameForIndexedAccess(node.argumentExpression, indexType);
-                if (name_12 !== undefined) {
-                    var prop = getPropertyOfType(objectType, name_12);
-                    if (prop) {
-                        getNodeLinks(node).resolvedSymbol = prop;
-                        return getTypeOfSymbol(prop);
-                    }
-                    else if (isConstEnum) {
-                        error(node.argumentExpression, ts.Diagnostics.Property_0_does_not_exist_on_const_enum_1, name_12, symbolToString(objectType.symbol));
-                        return unknownType;
-                    }
-                }
-            }
-            // Check for compatible indexer types.
-            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 258 /* StringLike */ | 132 /* NumberLike */ | 16777216 /* ESSymbol */)) {
-                // Try to use a number indexer.
-                if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 132 /* NumberLike */) || isForInVariableForNumericPropertyNames(node.argumentExpression)) {
-                    var numberIndexInfo = getIndexInfoOfType(objectType, 1 /* Number */);
-                    if (numberIndexInfo) {
-                        getNodeLinks(node).resolvedIndexInfo = numberIndexInfo;
-                        return numberIndexInfo.type;
-                    }
-                }
-                // Try to use string indexing.
-                var stringIndexInfo = getIndexInfoOfType(objectType, 0 /* String */);
-                if (stringIndexInfo) {
-                    getNodeLinks(node).resolvedIndexInfo = stringIndexInfo;
-                    return stringIndexInfo.type;
-                }
-                // Fall back to any.
-                if (compilerOptions.noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors && !isTypeAny(objectType)) {
-                    error(node, getIndexTypeOfType(objectType, 1 /* Number */) ?
-                        ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number :
-                        ts.Diagnostics.Index_signature_of_object_type_implicitly_has_an_any_type);
-                }
-                return anyType;
-            }
-            // REVIEW: Users should know the type that was actually used.
-            error(node, ts.Diagnostics.An_index_expression_argument_must_be_of_type_string_number_symbol_or_any);
-            return unknownType;
-        }
-        /**
-         * If indexArgumentExpression is a string literal or number literal, returns its text.
-         * If indexArgumentExpression is a constant value, returns its string value.
-         * If indexArgumentExpression is a well known symbol, returns the property name corresponding
-         *    to this symbol, as long as it is a proper symbol reference.
-         * Otherwise, returns undefined.
-         */
-        function getPropertyNameForIndexedAccess(indexArgumentExpression, indexArgumentType) {
-            if (indexArgumentExpression.kind === 9 /* StringLiteral */ || indexArgumentExpression.kind === 8 /* NumericLiteral */) {
-                return indexArgumentExpression.text;
-            }
-            if (indexArgumentExpression.kind === 173 /* ElementAccessExpression */ || indexArgumentExpression.kind === 172 /* PropertyAccessExpression */) {
-                var value = getConstantValue(indexArgumentExpression);
-                if (value !== undefined) {
-                    return value.toString();
-                }
-            }
-            if (checkThatExpressionIsProperSymbolReference(indexArgumentExpression, indexArgumentType, /*reportError*/ false)) {
-                var rightHandSideName = indexArgumentExpression.name.text;
-                return ts.getPropertyNameForKnownSymbolName(rightHandSideName);
-            }
-            return undefined;
-        }
-        /**
-         * A proper symbol reference requires the following:
-         *   1. The property access denotes a property that exists
-         *   2. The expression is of the form Symbol.<identifier>
-         *   3. The property access is of the primitive type symbol.
-         *   4. Symbol in this context resolves to the global Symbol object
-         */
-        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
-            if (expressionType === unknownType) {
-                // There is already an error, so no need to report one.
-                return false;
-            }
-            if (!ts.isWellKnownSymbolSyntactically(expression)) {
-                return false;
-            }
-            // Make sure the property type is the primitive symbol type
-            if ((expressionType.flags & 16777216 /* ESSymbol */) === 0) {
-                if (reportError) {
-                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
-                }
-                return false;
-            }
-            // The name is Symbol.<someName>, so make sure Symbol actually resolves to the
-            // global Symbol object
-            var leftHandSide = expression.expression;
-            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
-            if (!leftHandSideSymbol) {
-                return false;
-            }
-            var globalESSymbol = getGlobalESSymbolConstructorSymbol();
-            if (!globalESSymbol) {
-                // Already errored when we tried to look up the symbol
-                return false;
-            }
-            if (leftHandSideSymbol !== globalESSymbol) {
-                if (reportError) {
-                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
-                }
-                return false;
-            }
-            return true;
-        }
-        function resolveUntypedCall(node) {
-            if (node.kind === 176 /* TaggedTemplateExpression */) {
-                checkExpression(node.template);
-            }
-            else if (node.kind !== 143 /* Decorator */) {
-                ts.forEach(node.arguments, function (argument) {
-                    checkExpression(argument);
-                });
-            }
-            return anySignature;
-        }
-        function resolveErrorCall(node) {
-            resolveUntypedCall(node);
-            return unknownSignature;
-        }
-        // Re-order candidate signatures into the result array. Assumes the result array to be empty.
-        // The candidate list orders groups in reverse, but within a group signatures are kept in declaration order
-        // A nit here is that we reorder only signatures that belong to the same symbol,
-        // so order how inherited signatures are processed is still preserved.
-        // interface A { (x: string): void }
-        // interface B extends A { (x: 'foo'): string }
-        // const b: B;
-        // b('foo') // <- here overloads should be processed as [(x:'foo'): string, (x: string): void]
-        function reorderCandidates(signatures, result) {
-            var lastParent;
-            var lastSymbol;
-            var cutoffIndex = 0;
-            var index;
-            var specializedIndex = -1;
-            var spliceIndex;
-            ts.Debug.assert(!result.length);
-            for (var _i = 0, signatures_2 = signatures; _i < signatures_2.length; _i++) {
-                var signature = signatures_2[_i];
-                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
-                var parent_9 = signature.declaration && signature.declaration.parent;
-                if (!lastSymbol || symbol === lastSymbol) {
-                    if (lastParent && parent_9 === lastParent) {
-                        index++;
-                    }
-                    else {
-                        lastParent = parent_9;
-                        index = cutoffIndex;
-                    }
-                }
-                else {
-                    // current declaration belongs to a different symbol
-                    // set cutoffIndex so re-orderings in the future won't change result set from 0 to cutoffIndex
-                    index = cutoffIndex = result.length;
-                    lastParent = parent_9;
-                }
-                lastSymbol = symbol;
-                // specialized signatures always need to be placed before non-specialized signatures regardless
-                // of the cutoff position; see GH#1133
-                if (signature.hasStringLiterals) {
-                    specializedIndex++;
-                    spliceIndex = specializedIndex;
-                    // The cutoff index always needs to be greater than or equal to the specialized signature index
-                    // in order to prevent non-specialized signatures from being added before a specialized
-                    // signature.
-                    cutoffIndex++;
-                }
-                else {
-                    spliceIndex = index;
-                }
-                result.splice(spliceIndex, 0, signature);
-            }
-        }
-        function getSpreadArgumentIndex(args) {
-            for (var i = 0; i < args.length; i++) {
-                var arg = args[i];
-                if (arg && arg.kind === 191 /* SpreadElementExpression */) {
-                    return i;
-                }
-            }
-            return -1;
-        }
-        function hasCorrectArity(node, args, signature) {
-            var adjustedArgCount; // Apparent number of arguments we will have in this call
-            var typeArguments; // Type arguments (undefined if none)
-            var callIsIncomplete; // In incomplete call we want to be lenient when we have too few arguments
-            var isDecorator;
-            var spreadArgIndex = -1;
-            if (node.kind === 176 /* TaggedTemplateExpression */) {
-                var tagExpression = node;
-                // Even if the call is incomplete, we'll have a missing expression as our last argument,
-                // so we can say the count is just the arg list length
-                adjustedArgCount = args.length;
-                typeArguments = undefined;
-                if (tagExpression.template.kind === 189 /* TemplateExpression */) {
-                    // If a tagged template expression lacks a tail literal, the call is incomplete.
-                    // Specifically, a template only can end in a TemplateTail or a Missing literal.
-                    var templateExpression = tagExpression.template;
-                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
-                    ts.Debug.assert(lastSpan !== undefined); // we should always have at least one span.
-                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
-                }
-                else {
-                    // If the template didn't end in a backtick, or its beginning occurred right prior to EOF,
-                    // then this might actually turn out to be a TemplateHead in the future;
-                    // so we consider the call to be incomplete.
-                    var templateLiteral = tagExpression.template;
-                    ts.Debug.assert(templateLiteral.kind === 11 /* NoSubstitutionTemplateLiteral */);
-                    callIsIncomplete = !!templateLiteral.isUnterminated;
-                }
-            }
-            else if (node.kind === 143 /* Decorator */) {
-                isDecorator = true;
-                typeArguments = undefined;
-                adjustedArgCount = getEffectiveArgumentCount(node, /*args*/ undefined, signature);
-            }
-            else {
-                var callExpression = node;
-                if (!callExpression.arguments) {
-                    // This only happens when we have something of the form: 'new C'
-                    ts.Debug.assert(callExpression.kind === 175 /* NewExpression */);
-                    return signature.minArgumentCount === 0;
-                }
-                // For IDE scenarios we may have an incomplete call, so a trailing comma is tantamount to adding another argument.
-                adjustedArgCount = callExpression.arguments.hasTrailingComma ? args.length + 1 : args.length;
-                // If we are missing the close paren, the call is incomplete.
-                callIsIncomplete = callExpression.arguments.end === callExpression.end;
-                typeArguments = callExpression.typeArguments;
-                spreadArgIndex = getSpreadArgumentIndex(args);
-            }
-            // If the user supplied type arguments, but the number of type arguments does not match
-            // the declared number of type parameters, the call has an incorrect arity.
-            var hasRightNumberOfTypeArgs = !typeArguments ||
-                (signature.typeParameters && typeArguments.length === signature.typeParameters.length);
-            if (!hasRightNumberOfTypeArgs) {
-                return false;
-            }
-            // If spread arguments are present, check that they correspond to a rest parameter. If so, no
-            // further checking is necessary.
-            if (spreadArgIndex >= 0) {
-                return isRestParameterIndex(signature, spreadArgIndex);
-            }
-            // Too many arguments implies incorrect arity.
-            if (!signature.hasRestParameter && adjustedArgCount > signature.parameters.length) {
-                return false;
-            }
-            // If the call is incomplete, we should skip the lower bound check.
-            var hasEnoughArguments = adjustedArgCount >= signature.minArgumentCount;
-            return callIsIncomplete || hasEnoughArguments;
-        }
-        // If type has a single call signature and no other members, return that signature. Otherwise, return undefined.
-        function getSingleCallSignature(type) {
-            if (type.flags & 80896 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
-                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                    return resolved.callSignatures[0];
-                }
-            }
-            return undefined;
-        }
-        // Instantiate a generic signature in the context of a non-generic signature (section 3.8.5 in TypeScript spec)
-        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
-            var context = createInferenceContext(signature.typeParameters, /*inferUnionTypes*/ true);
-            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
-                // Type parameters from outer context referenced by source type are fixed by instantiation of the source type
-                inferTypes(context, instantiateType(source, contextualMapper), target);
-            });
-            return getSignatureInstantiation(signature, getInferredTypes(context));
-        }
-        function inferTypeArguments(node, signature, args, excludeArgument, context) {
-            var typeParameters = signature.typeParameters;
-            var inferenceMapper = getInferenceMapper(context);
-            // Clear out all the inference results from the last time inferTypeArguments was called on this context
-            for (var i = 0; i < typeParameters.length; i++) {
-                // As an optimization, we don't have to clear (and later recompute) inferred types
-                // for type parameters that have already been fixed on the previous call to inferTypeArguments.
-                // It would be just as correct to reset all of them. But then we'd be repeating the same work
-                // for the type parameters that were fixed, namely the work done by getInferredType.
-                if (!context.inferences[i].isFixed) {
-                    context.inferredTypes[i] = undefined;
-                }
-            }
-            // On this call to inferTypeArguments, we may get more inferences for certain type parameters that were not
-            // fixed last time. This means that a type parameter that failed inference last time may succeed this time,
-            // or vice versa. Therefore, the failedTypeParameterIndex is useless if it points to an unfixed type parameter,
-            // because it may change. So here we reset it. However, getInferredType will not revisit any type parameters
-            // that were previously fixed. So if a fixed type parameter failed previously, it will fail again because
-            // it will contain the exact same set of inferences. So if we reset the index from a fixed type parameter,
-            // we will lose information that we won't recover this time around.
-            if (context.failedTypeParameterIndex !== undefined && !context.inferences[context.failedTypeParameterIndex].isFixed) {
-                context.failedTypeParameterIndex = undefined;
-            }
-            if (signature.thisType) {
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                inferTypes(context, thisArgumentType, signature.thisType);
-            }
-            // We perform two passes over the arguments. In the first pass we infer from all arguments, but use
-            // wildcards for all context sensitive function expressions.
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
-                if (arg === undefined || arg.kind !== 193 /* OmittedExpression */) {
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    // If the effective argument type is 'undefined', there is no synthetic type
-                    // for the argument. In that case, we should check the argument.
-                    if (argType === undefined) {
-                        // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
-                        // context sensitive function expressions as wildcards
-                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : inferenceMapper;
-                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
-                    }
-                    inferTypes(context, argType, paramType);
-                }
-            }
-            // In the second pass we visit only context sensitive arguments, and only those that aren't excluded, this
-            // time treating function expressions normally (which may cause previously inferred type arguments to be fixed
-            // as we construct types for contextually typed parameters)
-            // Decorators will not have `excludeArgument`, as their arguments cannot be contextually typed.
-            // Tagged template expressions will always have `undefined` for `excludeArgument[0]`.
-            if (excludeArgument) {
-                for (var i = 0; i < argCount; i++) {
-                    // No need to check for omitted args and template expressions, their exclusion value is always undefined
-                    if (excludeArgument[i] === false) {
-                        var arg = args[i];
-                        var paramType = getTypeAtPosition(signature, i);
-                        inferTypes(context, checkExpressionWithContextualType(arg, paramType, inferenceMapper), paramType);
-                    }
-                }
-            }
-            getInferredTypes(context);
-        }
-        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
-            var typeParameters = signature.typeParameters;
-            var typeArgumentsAreAssignable = true;
-            var mapper;
-            for (var i = 0; i < typeParameters.length; i++) {
-                if (typeArgumentsAreAssignable /* so far */) {
-                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                    if (constraint) {
-                        var errorInfo = void 0;
-                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
-                        if (reportErrors && headMessage) {
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
-                            typeArgumentHeadMessage = headMessage;
-                        }
-                        if (!mapper) {
-                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
-                        }
-                        var typeArgument = typeArgumentTypes[i];
-                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
-                    }
-                }
-            }
-            return typeArgumentsAreAssignable;
-        }
-        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
-            if (signature.thisType && signature.thisType !== voidType && node.kind !== 175 /* NewExpression */) {
-                // If the called expression is not of the form `x.f` or `x["f"]`, then sourceType = voidType
-                // If the signature's 'this' type is voidType, then the check is skipped -- anything is compatible.
-                // If the expression is a new expression, then the check is skipped.
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
-                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
-                if (!checkTypeRelatedTo(thisArgumentType, signature.thisType, relation, errorNode, headMessage_1)) {
-                    return false;
-                }
-            }
-            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
-                if (arg === undefined || arg.kind !== 193 /* OmittedExpression */) {
-                    // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    // If the effective argument type is 'undefined', there is no synthetic type
-                    // for the argument. In that case, we should check the argument.
-                    if (argType === undefined) {
-                        argType = arg.kind === 9 /* StringLiteral */ && !reportErrors
-                            ? getStringLiteralTypeForText(arg.text)
-                            : checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
-                    }
-                    // Use argument expression as error location when reporting errors
-                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
-                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        /**
-         * Returns the this argument in calls like x.f(...) and x[f](...). Undefined otherwise.
-         */
-        function getThisArgumentOfCall(node) {
-            if (node.kind === 174 /* CallExpression */) {
-                var callee = node.expression;
-                if (callee.kind === 172 /* PropertyAccessExpression */) {
-                    return callee.expression;
-                }
-                else if (callee.kind === 173 /* ElementAccessExpression */) {
-                    return callee.expression;
-                }
-            }
-        }
-        /**
-         * Returns the effective arguments for an expression that works like a function invocation.
-         *
-         * If 'node' is a CallExpression or a NewExpression, then its argument list is returned.
-         * If 'node' is a TaggedTemplateExpression, a new argument list is constructed from the substitution
-         *    expressions, where the first element of the list is `undefined`.
-         * If 'node' is a Decorator, the argument list will be `undefined`, and its arguments and types
-         *    will be supplied from calls to `getEffectiveArgumentCount` and `getEffectiveArgumentType`.
-         */
-        function getEffectiveCallArguments(node) {
-            var args;
-            if (node.kind === 176 /* TaggedTemplateExpression */) {
-                var template = node.template;
-                args = [undefined];
-                if (template.kind === 189 /* TemplateExpression */) {
-                    ts.forEach(template.templateSpans, function (span) {
-                        args.push(span.expression);
-                    });
-                }
-            }
-            else if (node.kind === 143 /* Decorator */) {
-                // For a decorator, we return undefined as we will determine
-                // the number and types of arguments for a decorator using
-                // `getEffectiveArgumentCount` and `getEffectiveArgumentType` below.
-                return undefined;
-            }
-            else {
-                args = node.arguments || emptyArray;
-            }
-            return args;
-        }
-        /**
-          * Returns the effective argument count for a node that works like a function invocation.
-          * If 'node' is a Decorator, the number of arguments is derived from the decoration
-          *    target and the signature:
-          *    If 'node.target' is a class declaration or class expression, the effective argument
-          *       count is 1.
-          *    If 'node.target' is a parameter declaration, the effective argument count is 3.
-          *    If 'node.target' is a property declaration, the effective argument count is 2.
-          *    If 'node.target' is a method or accessor declaration, the effective argument count
-          *       is 3, although it can be 2 if the signature only accepts two arguments, allowing
-          *       us to match a property decorator.
-          * Otherwise, the argument count is the length of the 'args' array.
-          */
-        function getEffectiveArgumentCount(node, args, signature) {
-            if (node.kind === 143 /* Decorator */) {
-                switch (node.parent.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                        // A class decorator will have one argument (see `ClassDecorator` in core.d.ts)
-                        return 1;
-                    case 145 /* PropertyDeclaration */:
-                        // A property declaration decorator will have two arguments (see
-                        // `PropertyDecorator` in core.d.ts)
-                        return 2;
-                    case 147 /* MethodDeclaration */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        // A method or accessor declaration decorator will have two or three arguments (see
-                        // `PropertyDecorator` and `MethodDecorator` in core.d.ts)
-                        // If we are emitting decorators for ES3, we will only pass two arguments.
-                        if (languageVersion === 0 /* ES3 */) {
-                            return 2;
-                        }
-                        // If the method decorator signature only accepts a target and a key, we will only
-                        // type check those arguments.
-                        return signature.parameters.length >= 3 ? 3 : 2;
-                    case 142 /* Parameter */:
-                        // A parameter declaration decorator will have three arguments (see
-                        // `ParameterDecorator` in core.d.ts)
-                        return 3;
-                }
-            }
-            else {
-                return args.length;
-            }
-        }
-        /**
-          * Returns the effective type of the first argument to a decorator.
-          * If 'node' is a class declaration or class expression, the effective argument type
-          *    is the type of the static side of the class.
-          * If 'node' is a parameter declaration, the effective argument type is either the type
-          *    of the static or instance side of the class for the parameter's parent method,
-          *    depending on whether the method is declared static.
-          *    For a constructor, the type is always the type of the static side of the class.
-          * If 'node' is a property, method, or accessor declaration, the effective argument
-          *    type is the type of the static or instance side of the parent class for class
-          *    element, depending on whether the element is declared static.
-          */
-        function getEffectiveDecoratorFirstArgumentType(node) {
-            // The first argument to a decorator is its `target`.
-            if (node.kind === 221 /* ClassDeclaration */) {
-                // For a class decorator, the `target` is the type of the class (e.g. the
-                // "static" or "constructor" side of the class)
-                var classSymbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(classSymbol);
-            }
-            if (node.kind === 142 /* Parameter */) {
-                // For a parameter decorator, the `target` is the parent type of the
-                // parameter's containing method.
-                node = node.parent;
-                if (node.kind === 148 /* Constructor */) {
-                    var classSymbol = getSymbolOfNode(node);
-                    return getTypeOfSymbol(classSymbol);
-                }
-            }
-            if (node.kind === 145 /* PropertyDeclaration */ ||
-                node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // For a property or method decorator, the `target` is the
-                // "static"-side type of the parent of the member if the member is
-                // declared "static"; otherwise, it is the "instance"-side type of the
-                // parent of the member.
-                return getParentTypeOfClassElement(node);
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        /**
-          * Returns the effective type for the second argument to a decorator.
-          * If 'node' is a parameter, its effective argument type is one of the following:
-          *    If 'node.parent' is a constructor, the effective argument type is 'any', as we
-          *       will emit `undefined`.
-          *    If 'node.parent' is a member with an identifier, numeric, or string literal name,
-          *       the effective argument type will be a string literal type for the member name.
-          *    If 'node.parent' is a computed property name, the effective argument type will
-          *       either be a symbol type or the string type.
-          * If 'node' is a member with an identifier, numeric, or string literal name, the
-          *    effective argument type will be a string literal type for the member name.
-          * If 'node' is a computed property name, the effective argument type will either
-          *    be a symbol type or the string type.
-          * A class decorator does not have a second argument type.
-          */
-        function getEffectiveDecoratorSecondArgumentType(node) {
-            // The second argument to a decorator is its `propertyKey`
-            if (node.kind === 221 /* ClassDeclaration */) {
-                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 142 /* Parameter */) {
-                node = node.parent;
-                if (node.kind === 148 /* Constructor */) {
-                    // For a constructor parameter decorator, the `propertyKey` will be `undefined`.
-                    return anyType;
-                }
-            }
-            if (node.kind === 145 /* PropertyDeclaration */ ||
-                node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // The `propertyKey` for a property or method decorator will be a
-                // string literal type if the member name is an identifier, number, or string;
-                // otherwise, if the member name is a computed property name it will
-                // be either string or symbol.
-                var element = node;
-                switch (element.name.kind) {
-                    case 69 /* Identifier */:
-                    case 8 /* NumericLiteral */:
-                    case 9 /* StringLiteral */:
-                        return getStringLiteralTypeForText(element.name.text);
-                    case 140 /* ComputedPropertyName */:
-                        var nameType = checkComputedPropertyName(element.name);
-                        if (isTypeOfKind(nameType, 16777216 /* ESSymbol */)) {
-                            return nameType;
-                        }
-                        else {
-                            return stringType;
-                        }
-                    default:
-                        ts.Debug.fail("Unsupported property name.");
-                        return unknownType;
-                }
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        /**
-          * Returns the effective argument type for the third argument to a decorator.
-          * If 'node' is a parameter, the effective argument type is the number type.
-          * If 'node' is a method or accessor, the effective argument type is a
-          *    `TypedPropertyDescriptor<T>` instantiated with the type of the member.
-          * Class and property decorators do not have a third effective argument.
-          */
-        function getEffectiveDecoratorThirdArgumentType(node) {
-            // The third argument to a decorator is either its `descriptor` for a method decorator
-            // or its `parameterIndex` for a parameter decorator
-            if (node.kind === 221 /* ClassDeclaration */) {
-                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 142 /* Parameter */) {
-                // The `parameterIndex` for a parameter decorator is always a number
-                return numberType;
-            }
-            if (node.kind === 145 /* PropertyDeclaration */) {
-                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // The `descriptor` for a method decorator will be a `TypedPropertyDescriptor<T>`
-                // for the type of the member.
-                var propertyType = getTypeOfNode(node);
-                return createTypedPropertyDescriptorType(propertyType);
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        /**
-          * Returns the effective argument type for the provided argument to a decorator.
-          */
-        function getEffectiveDecoratorArgumentType(node, argIndex) {
-            if (argIndex === 0) {
-                return getEffectiveDecoratorFirstArgumentType(node.parent);
-            }
-            else if (argIndex === 1) {
-                return getEffectiveDecoratorSecondArgumentType(node.parent);
-            }
-            else if (argIndex === 2) {
-                return getEffectiveDecoratorThirdArgumentType(node.parent);
-            }
-            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
-            return unknownType;
-        }
-        /**
-          * Gets the effective argument type for an argument in a call expression.
-          */
-        function getEffectiveArgumentType(node, argIndex, arg) {
-            // Decorators provide special arguments, a tagged template expression provides
-            // a special first argument, and string literals get string literal types
-            // unless we're reporting errors
-            if (node.kind === 143 /* Decorator */) {
-                return getEffectiveDecoratorArgumentType(node, argIndex);
-            }
-            else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) {
-                return getGlobalTemplateStringsArrayType();
-            }
-            // This is not a synthetic argument, so we return 'undefined'
-            // to signal that the caller needs to check the argument.
-            return undefined;
-        }
-        /**
-          * Gets the effective argument expression for an argument in a call expression.
-          */
-        function getEffectiveArgument(node, args, argIndex) {
-            // For a decorator or the first argument of a tagged template expression we return undefined.
-            if (node.kind === 143 /* Decorator */ ||
-                (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */)) {
-                return undefined;
-            }
-            return args[argIndex];
-        }
-        /**
-          * Gets the error node to use when reporting errors for an effective argument.
-          */
-        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
-            if (node.kind === 143 /* Decorator */) {
-                // For a decorator, we use the expression of the decorator for error reporting.
-                return node.expression;
-            }
-            else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) {
-                // For a the first argument of a tagged template expression, we use the template of the tag for error reporting.
-                return node.template;
-            }
-            else {
-                return arg;
-            }
-        }
-        function resolveCall(node, signatures, candidatesOutArray, headMessage) {
-            var isTaggedTemplate = node.kind === 176 /* TaggedTemplateExpression */;
-            var isDecorator = node.kind === 143 /* Decorator */;
-            var typeArguments;
-            if (!isTaggedTemplate && !isDecorator) {
-                typeArguments = node.typeArguments;
-                // We already perform checking on the type arguments on the class declaration itself.
-                if (node.expression.kind !== 95 /* SuperKeyword */) {
-                    ts.forEach(typeArguments, checkSourceElement);
-                }
-            }
-            var candidates = candidatesOutArray || [];
-            // reorderCandidates fills up the candidates array directly
-            reorderCandidates(signatures, candidates);
-            if (!candidates.length) {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
-                return resolveErrorCall(node);
-            }
-            var args = getEffectiveCallArguments(node);
-            // The following applies to any value of 'excludeArgument[i]':
-            //    - true:      the argument at 'i' is susceptible to a one-time permanent contextual typing.
-            //    - undefined: the argument at 'i' is *not* susceptible to permanent contextual typing.
-            //    - false:     the argument at 'i' *was* and *has been* permanently contextually typed.
-            //
-            // The idea is that we will perform type argument inference & assignability checking once
-            // without using the susceptible parameters that are functions, and once more for each of those
-            // parameters, contextually typing each as we go along.
-            //
-            // For a tagged template, then the first argument be 'undefined' if necessary
-            // because it represents a TemplateStringsArray.
-            //
-            // For a decorator, no arguments are susceptible to contextual typing due to the fact
-            // decorators are applied to a declaration by the emitter, and not to an expression.
-            var excludeArgument;
-            if (!isDecorator) {
-                // We do not need to call `getEffectiveArgumentCount` here as it only
-                // applies when calculating the number of arguments for a decorator.
-                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
-                    if (isContextSensitive(args[i])) {
-                        if (!excludeArgument) {
-                            excludeArgument = new Array(args.length);
-                        }
-                        excludeArgument[i] = true;
-                    }
-                }
-            }
-            // The following variables are captured and modified by calls to chooseOverload.
-            // If overload resolution or type argument inference fails, we want to report the
-            // best error possible. The best error is one which says that an argument was not
-            // assignable to a parameter. This implies that everything else about the overload
-            // was fine. So if there is any overload that is only incorrect because of an
-            // argument, we will report an error on that one.
-            //
-            //     function foo(s: string) {}
-            //     function foo(n: number) {} // Report argument error on this overload
-            //     function foo() {}
-            //     foo(true);
-            //
-            // If none of the overloads even made it that far, there are two possibilities.
-            // There was a problem with type arguments for some overload, in which case
-            // report an error on that. Or none of the overloads even had correct arity,
-            // in which case give an arity error.
-            //
-            //     function foo<T>(x: T, y: T) {} // Report type argument inference error
-            //     function foo() {}
-            //     foo(0, true);
-            //
-            var candidateForArgumentError;
-            var candidateForTypeArgumentError;
-            var resultOfFailedInference;
-            var result;
-            // Section 4.12.1:
-            // if the candidate list contains one or more signatures for which the type of each argument
-            // expression is a subtype of each corresponding parameter type, the return type of the first
-            // of those signatures becomes the return type of the function call.
-            // Otherwise, the return type of the first signature in the candidate list becomes the return
-            // type of the function call.
-            //
-            // Whether the call is an error is determined by assignability of the arguments. The subtype pass
-            // is just important for choosing the best signature. So in the case where there is only one
-            // signature, the subtype pass is useless. So skipping it is an optimization.
-            if (candidates.length > 1) {
-                result = chooseOverload(candidates, subtypeRelation);
-            }
-            if (!result) {
-                // Reinitialize these pointers for round two
-                candidateForArgumentError = undefined;
-                candidateForTypeArgumentError = undefined;
-                resultOfFailedInference = undefined;
-                result = chooseOverload(candidates, assignableRelation);
-            }
-            if (result) {
-                return result;
-            }
-            // No signatures were applicable. Now report errors based on the last applicable signature with
-            // no arguments excluded from assignability checks.
-            // If candidate is undefined, it means that no candidates had a suitable arity. In that case,
-            // skip the checkApplicableSignature check.
-            if (candidateForArgumentError) {
-                // excludeArgument is undefined, in this case also equivalent to [undefined, undefined, ...]
-                // The importance of excludeArgument is to prevent us from typing function expression parameters
-                // in arguments too early. If possible, we'd like to only type them once we know the correct
-                // overload. However, this matters for the case where the call is correct. When the call is
-                // an error, we don't need to exclude any arguments, although it would cause no harm to do so.
-                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, /*excludeArgument*/ undefined, /*reportErrors*/ true);
-            }
-            else if (candidateForTypeArgumentError) {
-                if (!isTaggedTemplate && !isDecorator && typeArguments) {
-                    var typeArguments_2 = node.typeArguments;
-                    checkTypeArguments(candidateForTypeArgumentError, typeArguments_2, ts.map(typeArguments_2, getTypeFromTypeNode), /*reportErrors*/ true, headMessage);
-                }
-                else {
-                    ts.Debug.assert(resultOfFailedInference.failedTypeParameterIndex >= 0);
-                    var failedTypeParameter = candidateForTypeArgumentError.typeParameters[resultOfFailedInference.failedTypeParameterIndex];
-                    var inferenceCandidates = getInferenceCandidates(resultOfFailedInference, resultOfFailedInference.failedTypeParameterIndex);
-                    var diagnosticChainHead = ts.chainDiagnosticMessages(/*details*/ undefined, // details will be provided by call to reportNoCommonSupertypeError
-                    ts.Diagnostics.The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly, typeToString(failedTypeParameter));
-                    if (headMessage) {
-                        diagnosticChainHead = ts.chainDiagnosticMessages(diagnosticChainHead, headMessage);
-                    }
-                    reportNoCommonSupertypeError(inferenceCandidates, node.expression || node.tag, diagnosticChainHead);
-                }
-            }
-            else {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
-            }
-            // No signature was applicable. We have already reported the errors for the invalid signature.
-            // If this is a type resolution session, e.g. Language Service, try to get better information that anySignature.
-            // Pick the first candidate that matches the arity. This way we can get a contextual type for cases like:
-            //  declare function f(a: { xa: number; xb: number; });
-            //  f({ |
-            if (!produceDiagnostics) {
-                for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
-                    var candidate = candidates_1[_i];
-                    if (hasCorrectArity(node, args, candidate)) {
-                        if (candidate.typeParameters && typeArguments) {
-                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNode));
-                        }
-                        return candidate;
-                    }
-                }
-            }
-            return resolveErrorCall(node);
-            function reportError(message, arg0, arg1, arg2) {
-                var errorInfo;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
-                if (headMessage) {
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
-            }
-            function chooseOverload(candidates, relation) {
-                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
-                    var originalCandidate = candidates_2[_i];
-                    if (!hasCorrectArity(node, args, originalCandidate)) {
-                        continue;
-                    }
-                    var candidate = void 0;
-                    var typeArgumentsAreValid = void 0;
-                    var inferenceContext = originalCandidate.typeParameters
-                        ? createInferenceContext(originalCandidate.typeParameters, /*inferUnionTypes*/ false)
-                        : undefined;
-                    while (true) {
-                        candidate = originalCandidate;
-                        if (candidate.typeParameters) {
-                            var typeArgumentTypes = void 0;
-                            if (typeArguments) {
-                                typeArgumentTypes = ts.map(typeArguments, getTypeFromTypeNode);
-                                typeArgumentsAreValid = checkTypeArguments(candidate, typeArguments, typeArgumentTypes, /*reportErrors*/ false);
-                            }
-                            else {
-                                inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
-                                typeArgumentsAreValid = inferenceContext.failedTypeParameterIndex === undefined;
-                                typeArgumentTypes = inferenceContext.inferredTypes;
-                            }
-                            if (!typeArgumentsAreValid) {
-                                break;
-                            }
-                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
-                        }
-                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, /*reportErrors*/ false)) {
-                            break;
-                        }
-                        var index = excludeArgument ? ts.indexOf(excludeArgument, true) : -1;
-                        if (index < 0) {
-                            return candidate;
-                        }
-                        excludeArgument[index] = false;
-                    }
-                    // A post-mortem of this iteration of the loop. The signature was not applicable,
-                    // so we want to track it as a candidate for reporting an error. If the candidate
-                    // had no type parameters, or had no issues related to type arguments, we can
-                    // report an error based on the arguments. If there was an issue with type
-                    // arguments, then we can only report an error based on the type arguments.
-                    if (originalCandidate.typeParameters) {
-                        var instantiatedCandidate = candidate;
-                        if (typeArgumentsAreValid) {
-                            candidateForArgumentError = instantiatedCandidate;
-                        }
-                        else {
-                            candidateForTypeArgumentError = originalCandidate;
-                            if (!typeArguments) {
-                                resultOfFailedInference = inferenceContext;
-                            }
-                        }
-                    }
-                    else {
-                        ts.Debug.assert(originalCandidate === candidate);
-                        candidateForArgumentError = originalCandidate;
-                    }
-                }
-                return undefined;
-            }
-        }
-        function resolveCallExpression(node, candidatesOutArray) {
-            if (node.expression.kind === 95 /* SuperKeyword */) {
-                var superType = checkSuperExpression(node.expression);
-                if (superType !== unknownType) {
-                    // In super call, the candidate signatures are the matching arity signatures of the base constructor function instantiated
-                    // with the type arguments specified in the extends clause.
-                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
-                    if (baseTypeNode) {
-                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments);
-                        return resolveCall(node, baseConstructors, candidatesOutArray);
-                    }
-                }
-                return resolveUntypedCall(node);
-            }
-            var funcType = checkNonNullExpression(node.expression);
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                // Another error has already been reported
-                return resolveErrorCall(node);
-            }
-            // Technically, this signatures list may be incomplete. We are taking the apparent type,
-            // but we are not including call signatures that may have been added to the Object or
-            // Function interface, since they have none by default. This is a bit of a leap of faith
-            // that the user will not add any.
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
-            // TS 1.0 spec: 4.12
-            // If FuncExpr is of type Any, or of an object type that has no call or construct signatures
-            // but is a subtype of the Function interface, the call is an untyped function call. In an
-            // untyped function call no TypeArgs are permitted, Args can be any argument list, no contextual
-            // types are provided for the argument expressions, and the result is always of type Any.
-            // We exclude union types because we may have a union of function types that happen to have
-            // no common signatures.
-            if (isTypeAny(funcType) || (!callSignatures.length && !constructSignatures.length && !(funcType.flags & 16384 /* Union */) && isTypeAssignableTo(funcType, globalFunctionType))) {
-                // The unknownType indicates that an error already occurred (and was reported).  No
-                // need to report another error in this case.
-                if (funcType !== unknownType && node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
-                }
-                return resolveUntypedCall(node);
-            }
-            // If FuncExpr's apparent type(section 3.8.1) is a function type, the call is a typed function call.
-            // TypeScript employs overload resolution in typed function calls in order to support functions
-            // with multiple call signatures.
-            if (!callSignatures.length) {
-                if (constructSignatures.length) {
-                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
-                }
-                else {
-                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                }
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        function resolveNewExpression(node, candidatesOutArray) {
-            if (node.arguments && languageVersion < 1 /* ES5 */) {
-                var spreadIndex = getSpreadArgumentIndex(node.arguments);
-                if (spreadIndex >= 0) {
-                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
-                }
-            }
-            var expressionType = checkNonNullExpression(node.expression);
-            // If expressionType's apparent type(section 3.8.1) is an object type with one or
-            // more construct signatures, the expression is processed in the same manner as a
-            // function call, but using the construct signatures as the initial set of candidate
-            // signatures for overload resolution. The result type of the function call becomes
-            // the result type of the operation.
-            expressionType = getApparentType(expressionType);
-            if (expressionType === unknownType) {
-                // Another error has already been reported
-                return resolveErrorCall(node);
-            }
-            // If the expression is a class of abstract type, then it cannot be instantiated.
-            // Note, only class declarations can be declared abstract.
-            // In the case of a merged class-module or class-interface declaration,
-            // only the class declaration node will have the Abstract flag set.
-            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
-            if (valueDecl && valueDecl.flags & 128 /* Abstract */) {
-                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
-                return resolveErrorCall(node);
-            }
-            // TS 1.0 spec: 4.11
-            // If expressionType is of type Any, Args can be any argument
-            // list and the result of the operation is of type Any.
-            if (isTypeAny(expressionType)) {
-                if (node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
-                }
-                return resolveUntypedCall(node);
-            }
-            // Technically, this signatures list may be incomplete. We are taking the apparent type,
-            // but we are not including construct signatures that may have been added to the Object or
-            // Function interface, since they have none by default. This is a bit of a leap of faith
-            // that the user will not add any.
-            var constructSignatures = getSignaturesOfType(expressionType, 1 /* Construct */);
-            if (constructSignatures.length) {
-                if (!isConstructorAccessible(node, constructSignatures[0])) {
-                    return resolveErrorCall(node);
-                }
-                return resolveCall(node, constructSignatures, candidatesOutArray);
-            }
-            // If expressionType's apparent type is an object type with no construct signatures but
-            // one or more call signatures, the expression is processed as a function call. A compile-time
-            // error occurs if the result of the function call is not Void. The type of the result of the
-            // operation is Any. It is an error to have a Void this type.
-            var callSignatures = getSignaturesOfType(expressionType, 0 /* Call */);
-            if (callSignatures.length) {
-                var signature = resolveCall(node, callSignatures, candidatesOutArray);
-                if (getReturnTypeOfSignature(signature) !== voidType) {
-                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
-                }
-                if (signature.thisType === voidType) {
-                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
-                }
-                return signature;
-            }
-            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
-            return resolveErrorCall(node);
-        }
-        function isConstructorAccessible(node, signature) {
-            if (!signature || !signature.declaration) {
-                return true;
-            }
-            var declaration = signature.declaration;
-            var flags = declaration.flags;
-            // Public constructor is accessible.
-            if (!(flags & (8 /* Private */ | 16 /* Protected */))) {
-                return true;
-            }
-            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
-            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
-            // A private or protected constructor can only be instantiated within it's own class 
-            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                if (flags & 8 /* Private */) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
-                if (flags & 16 /* Protected */) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
-                return false;
-            }
-            return true;
-        }
-        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
-            var tagType = checkExpression(node.tag);
-            var apparentType = getApparentType(tagType);
-            if (apparentType === unknownType) {
-                // Another error has already been reported
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            if (isTypeAny(tagType) || (!callSignatures.length && !(tagType.flags & 16384 /* Union */) && isTypeAssignableTo(tagType, globalFunctionType))) {
-                return resolveUntypedCall(node);
-            }
-            if (!callSignatures.length) {
-                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        /**
-          * Gets the localized diagnostic head message to use for errors when resolving a decorator as a call expression.
-          */
-        function getDiagnosticHeadMessageForDecoratorResolution(node) {
-            switch (node.parent.kind) {
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
-                case 142 /* Parameter */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
-                case 145 /* PropertyDeclaration */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
-                case 147 /* MethodDeclaration */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
-            }
-        }
-        /**
-          * Resolves a decorator as if it were a call expression.
-          */
-        function resolveDecorator(node, candidatesOutArray) {
-            var funcType = checkExpression(node.expression);
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            if (funcType === anyType || (!callSignatures.length && !(funcType.flags & 16384 /* Union */) && isTypeAssignableTo(funcType, globalFunctionType))) {
-                return resolveUntypedCall(node);
-            }
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            if (!callSignatures.length) {
-                var errorInfo = void 0;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
-        }
-        function resolveSignature(node, candidatesOutArray) {
-            switch (node.kind) {
-                case 174 /* CallExpression */:
-                    return resolveCallExpression(node, candidatesOutArray);
-                case 175 /* NewExpression */:
-                    return resolveNewExpression(node, candidatesOutArray);
-                case 176 /* TaggedTemplateExpression */:
-                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
-                case 143 /* Decorator */:
-                    return resolveDecorator(node, candidatesOutArray);
-            }
-            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
-        }
-        // candidatesOutArray is passed by signature help in the language service, and collectCandidates
-        // must fill it up with the appropriate candidate signatures
-        function getResolvedSignature(node, candidatesOutArray) {
-            var links = getNodeLinks(node);
-            // If getResolvedSignature has already been called, we will have cached the resolvedSignature.
-            // However, it is possible that either candidatesOutArray was not passed in the first time,
-            // or that a different candidatesOutArray was passed in. Therefore, we need to redo the work
-            // to correctly fill the candidatesOutArray.
-            var cached = links.resolvedSignature;
-            if (cached && cached !== anySignature && !candidatesOutArray) {
-                return cached;
-            }
-            links.resolvedSignature = anySignature;
-            var result = resolveSignature(node, candidatesOutArray);
-            // If signature resolution originated in control flow type analysis (for example to compute the
-            // assigned type in a flow assignment) we don't cache the result as it may be based on temporary
-            // types from the control flow analysis.
-            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
-            return result;
-        }
-        function getResolvedOrAnySignature(node) {
-            // If we're already in the process of resolving the given signature, don't resolve again as
-            // that could cause infinite recursion. Instead, return anySignature.
-            return getNodeLinks(node).resolvedSignature === anySignature ? anySignature : getResolvedSignature(node);
-        }
-        function getInferredClassType(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.inferredClassType) {
-                links.inferredClassType = createAnonymousType(undefined, symbol.members, emptyArray, emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
-            }
-            return links.inferredClassType;
-        }
-        /**
-         * Syntactically and semantically checks a call or new expression.
-         * @param node The call/new expression to be checked.
-         * @returns On success, the expression's signature's return type. On failure, anyType.
-         */
-        function checkCallExpression(node) {
-            // Grammar checking; stop grammar-checking if checkGrammarTypeArguments return true
-            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
-            var signature = getResolvedSignature(node);
-            if (node.expression.kind === 95 /* SuperKeyword */) {
-                return voidType;
-            }
-            if (node.kind === 175 /* NewExpression */) {
-                var declaration = signature.declaration;
-                if (declaration &&
-                    declaration.kind !== 148 /* Constructor */ &&
-                    declaration.kind !== 152 /* ConstructSignature */ &&
-                    declaration.kind !== 157 /* ConstructorType */ &&
-                    !ts.isJSDocConstructSignature(declaration)) {
-                    // When resolved signature is a call signature (and not a construct signature) the result type is any, unless
-                    // the declaring function had members created through 'x.prototype.y = expr' or 'this.y = expr' psuedodeclarations
-                    // in a JS file
-                    var funcSymbol = checkExpression(node.expression).symbol;
-                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16 /* Function */)) {
-                        return getInferredClassType(funcSymbol);
-                    }
-                    else if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
-                    }
-                    return anyType;
-                }
-            }
-            // In JavaScript files, calls to any identifier 'require' are treated as external module imports
-            if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
-                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
-            }
-            return getReturnTypeOfSignature(signature);
-        }
-        function checkTaggedTemplateExpression(node) {
-            return getReturnTypeOfSignature(getResolvedSignature(node));
-        }
-        function checkAssertion(node) {
-            var exprType = getRegularTypeOfObjectLiteral(checkExpression(node.expression));
-            var targetType = getTypeFromTypeNode(node.type);
-            if (produceDiagnostics && targetType !== unknownType) {
-                var widenedType = getWidenedType(exprType);
-                if (!isTypeComparableTo(targetType, widenedType)) {
-                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
-                }
-            }
-            return targetType;
-        }
-        function checkNonNullAssertion(node) {
-            return getNonNullableType(checkExpression(node.expression));
-        }
-        function getTypeOfParameter(symbol) {
-            var type = getTypeOfSymbol(symbol);
-            if (strictNullChecks) {
-                var declaration = symbol.valueDeclaration;
-                if (declaration && declaration.initializer) {
-                    return addNullableKind(type, 32 /* Undefined */);
-                }
-            }
-            return type;
-        }
-        function getTypeAtPosition(signature, pos) {
-            return signature.hasRestParameter ?
-                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
-                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
-        }
-        function assignContextualParameterTypes(signature, context, mapper) {
-            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
-            for (var i = 0; i < len; i++) {
-                var parameter = signature.parameters[i];
-                var contextualParameterType = getTypeAtPosition(context, i);
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
-            }
-            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
-                var parameter = ts.lastOrUndefined(signature.parameters);
-                var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
-            }
-        }
-        // When contextual typing assigns a type to a parameter that contains a binding pattern, we also need to push
-        // the destructured type into the contained binding elements.
-        function assignBindingElementTypes(node) {
-            if (ts.isBindingPattern(node.name)) {
-                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (element.kind !== 193 /* OmittedExpression */) {
-                        if (element.name.kind === 69 /* Identifier */) {
-                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
-                        }
-                        assignBindingElementTypes(element);
-                    }
-                }
-            }
-        }
-        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType, mapper) {
-            var links = getSymbolLinks(parameter);
-            if (!links.type) {
-                links.type = instantiateType(contextualType, mapper);
-                // if inference didn't come up with anything but {}, fall back to the binding pattern if present.
-                if (links.type === emptyObjectType &&
-                    (parameter.valueDeclaration.name.kind === 167 /* ObjectBindingPattern */ ||
-                        parameter.valueDeclaration.name.kind === 168 /* ArrayBindingPattern */)) {
-                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
-                }
-                assignBindingElementTypes(parameter.valueDeclaration);
-            }
-            else if (isInferentialContext(mapper)) {
-                // Even if the parameter already has a type, it might be because it was given a type while
-                // processing the function as an argument to a prior signature during overload resolution.
-                // If this was the case, it may have caused some type parameters to be fixed. So here,
-                // we need to ensure that type parameters at the same positions get fixed again. This is
-                // done by calling instantiateType to attach the mapper to the contextualType, and then
-                // calling inferTypes to force a walk of contextualType so that all the correct fixing
-                // happens. The choice to pass in links.type may seem kind of arbitrary, but it serves
-                // to make sure that all the correct positions in contextualType are reached by the walk.
-                // Here is an example:
-                //
-                //      interface Base {
-                //          baseProp;
-                //      }
-                //      interface Derived extends Base {
-                //          toBase(): Base;
-                //      }
-                //
-                //      var derived: Derived;
-                //
-                //      declare function foo<T>(x: T, func: (p: T) => T): T;
-                //      declare function foo<T>(x: T, func: (p: T) => T): T;
-                //
-                //      var result = foo(derived, d => d.toBase());
-                //
-                // We are typing d while checking the second overload. But we've already given d
-                // a type (Derived) from the first overload. However, we still want to fix the
-                // T in the second overload so that we do not infer Base as a candidate for T
-                // (inferring Base would make type argument inference inconsistent between the two
-                // overloads).
-                inferTypes(mapper.context, links.type, instantiateType(contextualType, mapper));
-            }
-        }
-        function getReturnTypeFromJSDocComment(func) {
-            var returnTag = ts.getJSDocReturnTag(func);
-            if (returnTag && returnTag.typeExpression) {
-                return getTypeFromTypeNode(returnTag.typeExpression.type);
-            }
-            return undefined;
-        }
-        function createPromiseType(promisedType) {
-            // creates a `Promise<T>` type where `T` is the promisedType argument
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType !== emptyGenericType) {
-                // if the promised type is itself a promise, get the underlying type; otherwise, fallback to the promised type
-                promisedType = getAwaitedType(promisedType);
-                return createTypeReference(globalPromiseType, [promisedType]);
-            }
-            return emptyObjectType;
-        }
-        function getReturnTypeFromBody(func, contextualMapper) {
-            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
-            if (!func.body) {
-                return unknownType;
-            }
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var type;
-            if (func.body.kind !== 199 /* Block */) {
-                type = checkExpressionCached(func.body, contextualMapper);
-                if (isAsync) {
-                    // From within an async function you can return either a non-promise value or a promise. Any
-                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-                    // return type of the body should be unwrapped to its awaited type, which we will wrap in
-                    // the native Promise<T> type later in this function.
-                    type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                }
-            }
-            else {
-                var types = void 0;
-                var funcIsGenerator = !!func.asteriskToken;
-                if (funcIsGenerator) {
-                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
-                    if (types.length === 0) {
-                        var iterableIteratorAny = createIterableIteratorType(anyType);
-                        if (compilerOptions.noImplicitAny) {
-                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
-                        }
-                        return iterableIteratorAny;
-                    }
-                }
-                else {
-                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
-                    if (!types) {
-                        return neverType;
-                    }
-                    if (types.length === 0) {
-                        if (isAsync) {
-                            // For an async function, the return type will not be void, but rather a Promise for void.
-                            var promiseType = createPromiseType(voidType);
-                            if (promiseType === emptyObjectType) {
-                                error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-                                return unknownType;
-                            }
-                            return promiseType;
-                        }
-                        return voidType;
-                    }
-                }
-                // When yield/return statements are contextually typed we allow the return type to be a union type.
-                // Otherwise we require the yield/return expressions to have a best common supertype.
-                type = contextualSignature ? getUnionType(types) : getCommonSupertype(types);
-                if (!type) {
-                    if (funcIsGenerator) {
-                        error(func, ts.Diagnostics.No_best_common_type_exists_among_yield_expressions);
-                        return createIterableIteratorType(unknownType);
-                    }
-                    else {
-                        error(func, ts.Diagnostics.No_best_common_type_exists_among_return_expressions);
-                        // Defer to unioning the return types so we get a) downstream errors earlier and b) better Salsa experience
-                        return getUnionType(types);
-                    }
-                }
-                if (funcIsGenerator) {
-                    type = createIterableIteratorType(type);
-                }
-            }
-            if (!contextualSignature) {
-                reportErrorsFromWidening(func, type);
-            }
-            var widenedType = getWidenedType(type);
-            if (isAsync) {
-                // From within an async function you can return either a non-promise value or a promise. Any
-                // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-                // return type of the body is awaited type of the body, wrapped in a native Promise<T> type.
-                var promiseType = createPromiseType(widenedType);
-                if (promiseType === emptyObjectType) {
-                    error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-                    return unknownType;
-                }
-                return promiseType;
-            }
-            else {
-                return widenedType;
-            }
-        }
-        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
-            var aggregatedTypes = [];
-            ts.forEachYieldExpression(func.body, function (yieldExpression) {
-                var expr = yieldExpression.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (yieldExpression.asteriskToken) {
-                        // A yield* expression effectively yields everything that its operand yields
-                        type = checkElementTypeOfIterable(type, yieldExpression.expression);
-                    }
-                    if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
-                    }
-                }
-            });
-            return aggregatedTypes;
-        }
-        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var aggregatedTypes = [];
-            var hasReturnWithNoExpression = !!(func.flags & 32768 /* HasImplicitReturn */);
-            var hasReturnOfTypeNever = false;
-            ts.forEachReturnStatement(func.body, function (returnStatement) {
-                var expr = returnStatement.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (isAsync) {
-                        // From within an async function you can return either a non-promise value or a promise. Any
-                        // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-                        // return type of the body should be unwrapped to its awaited type, which should be wrapped in
-                        // the native Promise<T> type by the caller.
-                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                    }
-                    if (type === neverType) {
-                        hasReturnOfTypeNever = true;
-                    }
-                    else if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
-                    }
-                }
-                else {
-                    hasReturnWithNoExpression = true;
-                }
-            });
-            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
-                func.kind === 179 /* FunctionExpression */ || func.kind === 180 /* ArrowFunction */)) {
-                return undefined;
-            }
-            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
-                if (!ts.contains(aggregatedTypes, undefinedType)) {
-                    aggregatedTypes.push(undefinedType);
-                }
-            }
-            return aggregatedTypes;
-        }
-        /**
-         * TypeScript Specification 1.0 (6.3) - July 2014
-         *   An explicitly typed function whose return type isn't the Void type,
-         *   the Any type, or a union type containing the Void or Any type as a constituent
-         *   must have at least one return statement somewhere in its body.
-         *   An exception to this rule is if the function implementation consists of a single 'throw' statement.
-         *
-         * @param returnType - return type of the function, can be undefined if return type is not explicitly specified
-         */
-        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            // Functions with with an explicitly specified 'void' or 'any' return type don't need any return expressions.
-            if (returnType && maybeTypeOfKind(returnType, 1 /* Any */ | 16 /* Void */)) {
-                return;
-            }
-            // If all we have is a function signature, or an arrow function with an expression body, then there is nothing to check.
-            // also if HasImplicitReturn flag is not set this means that all codepaths in function body end with return or throw
-            if (ts.nodeIsMissing(func.body) || func.body.kind !== 199 /* Block */ || !(func.flags & 32768 /* HasImplicitReturn */)) {
-                return;
-            }
-            var hasExplicitReturn = func.flags & 65536 /* HasExplicitReturn */;
-            if (returnType === neverType) {
-                error(func.type, ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
-            }
-            else if (returnType && !hasExplicitReturn) {
-                // minimal check: function has syntactic return type annotation and no explicit return statements in the body
-                // this function does not conform to the specification.
-                // NOTE: having returnType !== undefined is a precondition for entering this branch so func.type will always be present
-                error(func.type, ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
-            }
-            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
-                error(func.type, ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
-            }
-            else if (compilerOptions.noImplicitReturns) {
-                if (!returnType) {
-                    // If return type annotation is omitted check if function has any explicit return statements.
-                    // If it does not have any - its inferred return type is void - don't do any checks.
-                    // Otherwise get inferred return type from function body and report error only if it is not void / anytype
-                    if (!hasExplicitReturn) {
-                        return;
-                    }
-                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
-                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
-                        return;
-                    }
-                }
-                error(func.type || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
-            }
-        }
-        function checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            // Grammar checking
-            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
-            if (!hasGrammarError && node.kind === 179 /* FunctionExpression */) {
-                checkGrammarForGenerator(node);
-            }
-            // The identityMapper object is used to indicate that function expressions are wildcards
-            if (contextualMapper === identityMapper && isContextSensitive(node)) {
-                checkNodeDeferred(node);
-                return anyFunctionType;
-            }
-            var links = getNodeLinks(node);
-            var type = getTypeOfSymbol(node.symbol);
-            var contextSensitive = isContextSensitive(node);
-            var mightFixTypeParameters = contextSensitive && isInferentialContext(contextualMapper);
-            // Check if function expression is contextually typed and assign parameter types if so.
-            // See the comment in assignTypeToParameterAndFixTypeParameters to understand why we need to
-            // check mightFixTypeParameters.
-            if (mightFixTypeParameters || !(links.flags & 1024 /* ContextChecked */)) {
-                var contextualSignature = getContextualSignature(node);
-                // If a type check is started at a function expression that is an argument of a function call, obtaining the
-                // contextual type may recursively get back to here during overload resolution of the call. If so, we will have
-                // already assigned contextual types.
-                var contextChecked = !!(links.flags & 1024 /* ContextChecked */);
-                if (mightFixTypeParameters || !contextChecked) {
-                    links.flags |= 1024 /* ContextChecked */;
-                    if (contextualSignature) {
-                        var signature = getSignaturesOfType(type, 0 /* Call */)[0];
-                        if (contextSensitive) {
-                            assignContextualParameterTypes(signature, contextualSignature, contextualMapper || identityMapper);
-                        }
-                        if (mightFixTypeParameters || !node.type && !signature.resolvedReturnType) {
-                            var returnType = getReturnTypeFromBody(node, contextualMapper);
-                            if (!signature.resolvedReturnType) {
-                                signature.resolvedReturnType = returnType;
-                            }
-                        }
-                    }
-                    if (!contextChecked) {
-                        checkSignatureDeclaration(node);
-                        checkNodeDeferred(node);
-                    }
-                }
-            }
-            if (produceDiagnostics && node.kind !== 147 /* MethodDeclaration */ && node.kind !== 146 /* MethodSignature */) {
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-            }
-            return type;
-        }
-        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            var isAsync = ts.isAsyncFunctionLike(node);
-            var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-            if (!node.asteriskToken) {
-                // return is not necessary in the body of generators
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (node.body) {
-                if (!node.type) {
-                    // There are some checks that are only performed in getReturnTypeFromBody, that may produce errors
-                    // we need. An example is the noImplicitAny errors resulting from widening the return expression
-                    // of a function. Because checking of function expression bodies is deferred, there was never an
-                    // appropriate time to do this during the main walk of the file (see the comment at the top of
-                    // checkFunctionExpressionBodies). So it must be done now.
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
-                }
-                if (node.body.kind === 199 /* Block */) {
-                    checkSourceElement(node.body);
-                }
-                else {
-                    // From within an async function you can return either a non-promise value or a promise. Any
-                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so we
-                    // should not be checking assignability of a promise to the return type. Instead, we need to
-                    // check assignability of the awaited type of the expression body against the promised type of
-                    // its return type annotation.
-                    var exprType = checkExpression(node.body);
-                    if (returnOrPromisedType) {
-                        if (isAsync) {
-                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member);
-                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
-                        }
-                    }
-                }
-            }
-        }
-        function checkArithmeticOperandType(operand, type, diagnostic) {
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 132 /* NumberLike */)) {
-                error(operand, diagnostic);
-                return false;
-            }
-            return true;
-        }
-        function isReadonlySymbol(symbol) {
-            // The following symbols are considered read-only:
-            // Properties with a 'readonly' modifier
-            // Variables declared with 'const'
-            // Get accessors without matching set accessors
-            // Enum members
-            return symbol.flags & 4 /* Property */ && (getDeclarationFlagsFromSymbol(symbol) & 64 /* Readonly */) !== 0 ||
-                symbol.flags & 3 /* Variable */ && (getDeclarationFlagsFromSymbol(symbol) & 2048 /* Const */) !== 0 ||
-                symbol.flags & 98304 /* Accessor */ && !(symbol.flags & 65536 /* SetAccessor */) ||
-                (symbol.flags & 8 /* EnumMember */) !== 0;
-        }
-        function isReferenceToReadonlyEntity(expr, symbol) {
-            if (isReadonlySymbol(symbol)) {
-                // Allow assignments to readonly properties within constructors of the same class declaration.
-                if (symbol.flags & 4 /* Property */ &&
-                    (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) &&
-                    expr.expression.kind === 97 /* ThisKeyword */) {
-                    // Look for if this is the constructor for the class that `symbol` is a property of.
-                    var func = ts.getContainingFunction(expr);
-                    if (!(func && func.kind === 148 /* Constructor */))
-                        return true;
-                    // If func.parent is a class and symbol is a (readonly) property of that class, or
-                    // if func is a constructor and symbol is a (readonly) parameter property declared in it,
-                    // then symbol is writeable here.
-                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
-                }
-                return true;
-            }
-            return false;
-        }
-        function isReferenceThroughNamespaceImport(expr) {
-            if (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) {
-                var node = skipParenthesizedNodes(expr.expression);
-                if (node.kind === 69 /* Identifier */) {
-                    var symbol = getNodeLinks(node).resolvedSymbol;
-                    if (symbol.flags & 8388608 /* Alias */) {
-                        var declaration = getDeclarationOfAliasSymbol(symbol);
-                        return declaration && declaration.kind === 232 /* NamespaceImport */;
-                    }
-                }
-            }
-            return false;
-        }
-        function checkReferenceExpression(expr, invalidReferenceMessage, constantVariableMessage) {
-            // References are combinations of identifiers, parentheses, and property accesses.
-            var node = skipParenthesizedNodes(expr);
-            if (node.kind !== 69 /* Identifier */ && node.kind !== 172 /* PropertyAccessExpression */ && node.kind !== 173 /* ElementAccessExpression */) {
-                error(expr, invalidReferenceMessage);
-                return false;
-            }
-            // Because we get the symbol from the resolvedSymbol property, it might be of kind
-            // SymbolFlags.ExportValue. In this case it is necessary to get the actual export
-            // symbol, which will have the correct flags set on it.
-            var links = getNodeLinks(node);
-            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
-            if (symbol) {
-                if (symbol !== unknownSymbol && symbol !== argumentsSymbol) {
-                    // Only variables (and not functions, classes, namespaces, enum objects, or enum members)
-                    // are considered references when referenced using a simple identifier.
-                    if (node.kind === 69 /* Identifier */ && !(symbol.flags & 3 /* Variable */)) {
-                        error(expr, invalidReferenceMessage);
-                        return false;
-                    }
-                    if (isReferenceToReadonlyEntity(node, symbol) || isReferenceThroughNamespaceImport(node)) {
-                        error(expr, constantVariableMessage);
-                        return false;
-                    }
-                }
-            }
-            else if (node.kind === 173 /* ElementAccessExpression */) {
-                if (links.resolvedIndexInfo && links.resolvedIndexInfo.isReadonly) {
-                    error(expr, constantVariableMessage);
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkDeleteExpression(node) {
-            checkExpression(node.expression);
-            return booleanType;
-        }
-        function checkTypeOfExpression(node) {
-            checkExpression(node.expression);
-            return stringType;
-        }
-        function checkVoidExpression(node) {
-            checkExpression(node.expression);
-            return undefinedType;
-        }
-        function checkAwaitExpression(node) {
-            // Grammar checking
-            if (produceDiagnostics) {
-                if (!(node.flags & 33554432 /* AwaitContext */)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
-                }
-            }
-            var operandType = checkExpression(node.expression);
-            return checkAwaitedType(operandType, node);
-        }
-        function checkPrefixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            switch (node.operator) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                    if (maybeTypeOfKind(operandType, 16777216 /* ESSymbol */)) {
-                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
-                    }
-                    return numberType;
-                case 49 /* ExclamationToken */:
-                    return booleanType;
-                case 41 /* PlusPlusToken */:
-                case 42 /* MinusMinusToken */:
-                    var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-                    if (ok) {
-                        // run check only if former checks succeeded to avoid reporting cascading errors
-                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
-                    }
-                    return numberType;
-            }
-            return unknownType;
-        }
-        function checkPostfixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-            if (ok) {
-                // run check only if former checks succeeded to avoid reporting cascading errors
-                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
-            }
-            return numberType;
-        }
-        // Return true if type might be of the given kind. A union or intersection type might be of a given
-        // kind if at least one constituent type is of the given kind.
-        function maybeTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 49152 /* UnionOrIntersection */) {
-                var types = type.types;
-                for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
-                    var t = types_10[_i];
-                    if (maybeTypeOfKind(t, kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        // Return true if type is of the given kind. A union type is of a given kind if all constituent types
-        // are of the given kind. An intersection type is of a given kind if at least one constituent type is
-        // of the given kind.
-        function isTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 16384 /* Union */) {
-                var types = type.types;
-                for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
-                    var t = types_11[_i];
-                    if (!isTypeOfKind(t, kind)) {
-                        return false;
-                    }
-                }
-                return true;
-            }
-            if (type.flags & 32768 /* Intersection */) {
-                var types = type.types;
-                for (var _a = 0, types_12 = types; _a < types_12.length; _a++) {
-                    var t = types_12[_a];
-                    if (isTypeOfKind(t, kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isConstEnumObjectType(type) {
-            return type.flags & (80896 /* ObjectType */ | 65536 /* Anonymous */) && type.symbol && isConstEnumSymbol(type.symbol);
-        }
-        function isConstEnumSymbol(symbol) {
-            return (symbol.flags & 128 /* ConstEnum */) !== 0;
-        }
-        function checkInstanceOfExpression(left, right, leftType, rightType) {
-            // TypeScript 1.0 spec (April 2014): 4.15.4
-            // The instanceof operator requires the left operand to be of type Any, an object type, or a type parameter type,
-            // and the right operand to be of type Any or a subtype of the 'Function' interface type.
-            // The result is always of the Boolean primitive type.
-            // NOTE: do not raise error if leftType is unknown as related error was already reported
-            if (isTypeOfKind(leftType, 16777726 /* Primitive */)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            // NOTE: do not raise error if right is unknown as related error was already reported
-            if (!(isTypeAny(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
-            }
-            return booleanType;
-        }
-        function checkInExpression(left, right, leftType, rightType) {
-            // TypeScript 1.0 spec (April 2014): 4.15.5
-            // The in operator requires the left operand to be of type Any, the String primitive type, or the Number primitive type,
-            // and the right operand to be of type Any, an object type, or a type parameter type.
-            // The result is always of the Boolean primitive type.
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 /* StringLike */ | 132 /* NumberLike */ | 16777216 /* ESSymbol */)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
-            }
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 /* ObjectType */ | 512 /* TypeParameter */)) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            return booleanType;
-        }
-        function checkObjectLiteralAssignment(node, sourceType, contextualMapper) {
-            var properties = node.properties;
-            for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
-                var p = properties_3[_i];
-                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, contextualMapper);
-            }
-            return sourceType;
-        }
-        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, contextualMapper) {
-            if (property.kind === 253 /* PropertyAssignment */ || property.kind === 254 /* ShorthandPropertyAssignment */) {
-                var name_13 = property.name;
-                if (name_13.kind === 140 /* ComputedPropertyName */) {
-                    checkComputedPropertyName(name_13);
-                }
-                if (isComputedNonLiteralName(name_13)) {
-                    return undefined;
-                }
-                var text = getTextOfPropertyName(name_13);
-                var type = isTypeAny(objectLiteralType)
-                    ? objectLiteralType
-                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
-                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1 /* Number */) ||
-                        getIndexTypeOfType(objectLiteralType, 0 /* String */);
-                if (type) {
-                    if (property.kind === 254 /* ShorthandPropertyAssignment */) {
-                        return checkDestructuringAssignment(property, type);
-                    }
-                    else {
-                        // non-shorthand property assignments should always have initializers
-                        return checkDestructuringAssignment(property.initializer, type);
-                    }
-                }
-                else {
-                    error(name_13, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_13));
-                }
-            }
-            else {
-                error(property, ts.Diagnostics.Property_assignment_expected);
-            }
-        }
-        function checkArrayLiteralAssignment(node, sourceType, contextualMapper) {
-            // This elementType will be used if the specific property corresponding to this index is not
-            // present (aka the tuple element property). This call also checks that the parentType is in
-            // fact an iterable or array (depending on target language).
-            var elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false) || unknownType;
-            var elements = node.elements;
-            for (var i = 0; i < elements.length; i++) {
-                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, contextualMapper);
-            }
-            return sourceType;
-        }
-        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, contextualMapper) {
-            var elements = node.elements;
-            var element = elements[elementIndex];
-            if (element.kind !== 193 /* OmittedExpression */) {
-                if (element.kind !== 191 /* SpreadElementExpression */) {
-                    var propName = "" + elementIndex;
-                    var type = isTypeAny(sourceType)
-                        ? sourceType
-                        : isTupleLikeType(sourceType)
-                            ? getTypeOfPropertyOfType(sourceType, propName)
-                            : elementType;
-                    if (type) {
-                        return checkDestructuringAssignment(element, type, contextualMapper);
-                    }
-                    else {
-                        if (isTupleType(sourceType)) {
-                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), sourceType.elementTypes.length, elements.length);
-                        }
-                        else {
-                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
-                        }
-                    }
-                }
-                else {
-                    if (elementIndex < elements.length - 1) {
-                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
-                    }
-                    else {
-                        var restExpression = element.expression;
-                        if (restExpression.kind === 187 /* BinaryExpression */ && restExpression.operatorToken.kind === 56 /* EqualsToken */) {
-                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
-                        }
-                        else {
-                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), contextualMapper);
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function checkDestructuringAssignment(exprOrAssignment, sourceType, contextualMapper) {
-            var target;
-            if (exprOrAssignment.kind === 254 /* ShorthandPropertyAssignment */) {
-                var prop = exprOrAssignment;
-                if (prop.objectAssignmentInitializer) {
-                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, contextualMapper);
-                }
-                target = exprOrAssignment.name;
-            }
-            else {
-                target = exprOrAssignment;
-            }
-            if (target.kind === 187 /* BinaryExpression */ && target.operatorToken.kind === 56 /* EqualsToken */) {
-                checkBinaryExpression(target, contextualMapper);
-                target = target.left;
-            }
-            if (target.kind === 171 /* ObjectLiteralExpression */) {
-                return checkObjectLiteralAssignment(target, sourceType, contextualMapper);
-            }
-            if (target.kind === 170 /* ArrayLiteralExpression */) {
-                return checkArrayLiteralAssignment(target, sourceType, contextualMapper);
-            }
-            return checkReferenceAssignment(target, sourceType, contextualMapper);
-        }
-        function checkReferenceAssignment(target, sourceType, contextualMapper) {
-            var targetType = checkExpression(target, contextualMapper);
-            if (checkReferenceExpression(target, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property)) {
-                checkTypeAssignableTo(sourceType, targetType, target, /*headMessage*/ undefined);
-            }
-            return sourceType;
-        }
-        function isTypeEqualityComparableTo(source, target) {
-            return (target.flags & 96 /* Nullable */) !== 0 || isTypeComparableTo(source, target);
-        }
-        function checkBinaryExpression(node, contextualMapper) {
-            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, contextualMapper, node);
-        }
-        function checkBinaryLikeExpression(left, operatorToken, right, contextualMapper, errorNode) {
-            var operator = operatorToken.kind;
-            if (operator === 56 /* EqualsToken */ && (left.kind === 171 /* ObjectLiteralExpression */ || left.kind === 170 /* ArrayLiteralExpression */)) {
-                return checkDestructuringAssignment(left, checkExpression(right, contextualMapper), contextualMapper);
-            }
-            var leftType = checkExpression(left, contextualMapper);
-            var rightType = checkExpression(right, contextualMapper);
-            switch (operator) {
-                case 37 /* AsteriskToken */:
-                case 38 /* AsteriskAsteriskToken */:
-                case 59 /* AsteriskEqualsToken */:
-                case 60 /* AsteriskAsteriskEqualsToken */:
-                case 39 /* SlashToken */:
-                case 61 /* SlashEqualsToken */:
-                case 40 /* PercentToken */:
-                case 62 /* PercentEqualsToken */:
-                case 36 /* MinusToken */:
-                case 58 /* MinusEqualsToken */:
-                case 43 /* LessThanLessThanToken */:
-                case 63 /* LessThanLessThanEqualsToken */:
-                case 44 /* GreaterThanGreaterThanToken */:
-                case 64 /* GreaterThanGreaterThanEqualsToken */:
-                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                case 47 /* BarToken */:
-                case 67 /* BarEqualsToken */:
-                case 48 /* CaretToken */:
-                case 68 /* CaretEqualsToken */:
-                case 46 /* AmpersandToken */:
-                case 66 /* AmpersandEqualsToken */:
-                    // TypeScript 1.0 spec (April 2014): 4.19.1
-                    // These operators require their operands to be of type Any, the Number primitive type,
-                    // or an enum type. Operands of an enum type are treated
-                    // as having the primitive type Number. If one operand is the null or undefined value,
-                    // it is treated as having the type of the other operand.
-                    // The result is always of the Number primitive type.
-                    if (leftType.flags & 96 /* Nullable */)
-                        leftType = rightType;
-                    if (rightType.flags & 96 /* Nullable */)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var suggestedOperator = void 0;
-                    // if a user tries to apply a bitwise operator to 2 boolean operands
-                    // try and return them a helpful suggestion
-                    if ((leftType.flags & 8 /* Boolean */) &&
-                        (rightType.flags & 8 /* Boolean */) &&
-                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
-                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
-                    }
-                    else {
-                        // otherwise just check each operand separately and report errors as normal
-                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        if (leftOk && rightOk) {
-                            checkAssignmentOperator(numberType);
-                        }
-                    }
-                    return numberType;
-                case 35 /* PlusToken */:
-                case 57 /* PlusEqualsToken */:
-                    // TypeScript 1.0 spec (April 2014): 4.19.2
-                    // The binary + operator requires both operands to be of the Number primitive type or an enum type,
-                    // or at least one of the operands to be of type Any or the String primitive type.
-                    // If one operand is the null or undefined value, it is treated as having the type of the other operand.
-                    if (leftType.flags & 96 /* Nullable */)
-                        leftType = rightType;
-                    if (rightType.flags & 96 /* Nullable */)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var resultType = void 0;
-                    if (isTypeOfKind(leftType, 132 /* NumberLike */) && isTypeOfKind(rightType, 132 /* NumberLike */)) {
-                        // Operands of an enum type are treated as having the primitive type Number.
-                        // If both operands are of the Number primitive type, the result is of the Number primitive type.
-                        resultType = numberType;
-                    }
-                    else {
-                        if (isTypeOfKind(leftType, 258 /* StringLike */) || isTypeOfKind(rightType, 258 /* StringLike */)) {
-                            // If one or both operands are of the String primitive type, the result is of the String primitive type.
-                            resultType = stringType;
-                        }
-                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
-                            // Otherwise, the result is of type Any.
-                            // NOTE: unknown type here denotes error type. Old compiler treated this case as any type so do we.
-                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
-                        }
-                        // Symbols are not allowed at all in arithmetic expressions
-                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
-                            return resultType;
-                        }
-                    }
-                    if (!resultType) {
-                        reportOperatorError();
-                        return anyType;
-                    }
-                    if (operator === 57 /* PlusEqualsToken */) {
-                        checkAssignmentOperator(resultType);
-                    }
-                    return resultType;
-                case 25 /* LessThanToken */:
-                case 27 /* GreaterThanToken */:
-                case 28 /* LessThanEqualsToken */:
-                case 29 /* GreaterThanEqualsToken */:
-                    if (checkForDisallowedESSymbolOperand(operator)) {
-                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
-                            reportOperatorError();
-                        }
-                    }
-                    return booleanType;
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
-                        reportOperatorError();
-                    }
-                    return booleanType;
-                case 91 /* InstanceOfKeyword */:
-                    return checkInstanceOfExpression(left, right, leftType, rightType);
-                case 90 /* InKeyword */:
-                    return checkInExpression(left, right, leftType, rightType);
-                case 51 /* AmpersandAmpersandToken */:
-                    return addNullableKind(rightType, getNullableKind(leftType));
-                case 52 /* BarBarToken */:
-                    return getUnionType([getNonNullableType(leftType), rightType]);
-                case 56 /* EqualsToken */:
-                    checkAssignmentOperator(rightType);
-                    return getRegularTypeOfObjectLiteral(rightType);
-                case 24 /* CommaToken */:
-                    return rightType;
-            }
-            // Return true if there was no error, false if there was an error.
-            function checkForDisallowedESSymbolOperand(operator) {
-                var offendingSymbolOperand = maybeTypeOfKind(leftType, 16777216 /* ESSymbol */) ? left :
-                    maybeTypeOfKind(rightType, 16777216 /* ESSymbol */) ? right :
-                        undefined;
-                if (offendingSymbolOperand) {
-                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
-                    return false;
-                }
-                return true;
-            }
-            function getSuggestedBooleanOperator(operator) {
-                switch (operator) {
-                    case 47 /* BarToken */:
-                    case 67 /* BarEqualsToken */:
-                        return 52 /* BarBarToken */;
-                    case 48 /* CaretToken */:
-                    case 68 /* CaretEqualsToken */:
-                        return 33 /* ExclamationEqualsEqualsToken */;
-                    case 46 /* AmpersandToken */:
-                    case 66 /* AmpersandEqualsToken */:
-                        return 51 /* AmpersandAmpersandToken */;
-                    default:
-                        return undefined;
-                }
-            }
-            function checkAssignmentOperator(valueType) {
-                if (produceDiagnostics && operator >= 56 /* FirstAssignment */ && operator <= 68 /* LastAssignment */) {
-                    // TypeScript 1.0 spec (April 2014): 4.17
-                    // An assignment of the form
-                    //    VarExpr = ValueExpr
-                    // requires VarExpr to be classified as a reference
-                    // A compound assignment furthermore requires VarExpr to be classified as a reference (section 4.1)
-                    // and the type of the non - compound operation to be assignable to the type of VarExpr.
-                    var ok = checkReferenceExpression(left, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property);
-                    // Use default messages
-                    if (ok) {
-                        // to avoid cascading errors check assignability only if 'isReference' check succeeded and no errors were reported
-                        checkTypeAssignableTo(valueType, leftType, left, /*headMessage*/ undefined);
-                    }
-                }
-            }
-            function reportOperatorError() {
-                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
-            }
-        }
-        function isYieldExpressionInClass(node) {
-            var current = node;
-            var parent = node.parent;
-            while (parent) {
-                if (ts.isFunctionLike(parent) && current === parent.body) {
-                    return false;
-                }
-                else if (ts.isClassLike(current)) {
-                    return true;
-                }
-                current = parent;
-                parent = parent.parent;
-            }
-            return false;
-        }
-        function checkYieldExpression(node) {
-            // Grammar checking
-            if (produceDiagnostics) {
-                if (!(node.flags & 8388608 /* YieldContext */) || isYieldExpressionInClass(node)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
-                }
-            }
-            if (node.expression) {
-                var func = ts.getContainingFunction(node);
-                // If the user's code is syntactically correct, the func should always have a star. After all,
-                // we are in a yield context.
-                if (func && func.asteriskToken) {
-                    var expressionType = checkExpressionCached(node.expression, /*contextualMapper*/ undefined);
-                    var expressionElementType = void 0;
-                    var nodeIsYieldStar = !!node.asteriskToken;
-                    if (nodeIsYieldStar) {
-                        expressionElementType = checkElementTypeOfIterable(expressionType, node.expression);
-                    }
-                    // There is no point in doing an assignability check if the function
-                    // has no explicit return type because the return type is directly computed
-                    // from the yield expressions.
-                    if (func.type) {
-                        var signatureElementType = getElementTypeOfIterableIterator(getTypeFromTypeNode(func.type)) || anyType;
-                        if (nodeIsYieldStar) {
-                            checkTypeAssignableTo(expressionElementType, signatureElementType, node.expression, /*headMessage*/ undefined);
-                        }
-                        else {
-                            checkTypeAssignableTo(expressionType, signatureElementType, node.expression, /*headMessage*/ undefined);
-                        }
-                    }
-                }
-            }
-            // Both yield and yield* expressions have type 'any'
-            return anyType;
-        }
-        function checkConditionalExpression(node, contextualMapper) {
-            checkExpression(node.condition);
-            var type1 = checkExpression(node.whenTrue, contextualMapper);
-            var type2 = checkExpression(node.whenFalse, contextualMapper);
-            return getUnionType([type1, type2]);
-        }
-        function checkStringLiteralExpression(node) {
-            var contextualType = getContextualType(node);
-            if (contextualType && contextualTypeIsStringLiteralType(contextualType)) {
-                return getStringLiteralTypeForText(node.text);
-            }
-            return stringType;
-        }
-        function checkTemplateExpression(node) {
-            // We just want to check each expressions, but we are unconcerned with
-            // the type of each expression, as any value may be coerced into a string.
-            // It is worth asking whether this is what we really want though.
-            // A place where we actually *are* concerned with the expressions' types are
-            // in tagged templates.
-            ts.forEach(node.templateSpans, function (templateSpan) {
-                checkExpression(templateSpan.expression);
-            });
-            return stringType;
-        }
-        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
-            var saveContextualType = node.contextualType;
-            node.contextualType = contextualType;
-            var result = checkExpression(node, contextualMapper);
-            node.contextualType = saveContextualType;
-            return result;
-        }
-        function checkExpressionCached(node, contextualMapper) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                // When computing a type that we're going to cache, we need to ignore any ongoing control flow
-                // analysis because variables may have transient types in indeterminable states. Moving flowLoopStart
-                // to the top of the stack ensures all transient types are computed from a known point.
-                var saveFlowLoopStart = flowLoopStart;
-                flowLoopStart = flowLoopCount;
-                links.resolvedType = checkExpression(node, contextualMapper);
-                flowLoopStart = saveFlowLoopStart;
-            }
-            return links.resolvedType;
-        }
-        function checkPropertyAssignment(node, contextualMapper) {
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 140 /* ComputedPropertyName */) {
-                checkComputedPropertyName(node.name);
-            }
-            return checkExpression(node.initializer, contextualMapper);
-        }
-        function checkObjectLiteralMethod(node, contextualMapper) {
-            // Grammar checking
-            checkGrammarMethod(node);
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 140 /* ComputedPropertyName */) {
-                checkComputedPropertyName(node.name);
-            }
-            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
-        }
-        function instantiateTypeWithSingleGenericCallSignature(node, type, contextualMapper) {
-            if (isInferentialContext(contextualMapper)) {
-                var signature = getSingleCallSignature(type);
-                if (signature && signature.typeParameters) {
-                    var contextualType = getApparentTypeOfContextualType(node);
-                    if (contextualType) {
-                        var contextualSignature = getSingleCallSignature(contextualType);
-                        if (contextualSignature && !contextualSignature.typeParameters) {
-                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper));
-                        }
-                    }
-                }
-            }
-            return type;
-        }
-        // Checks an expression and returns its type. The contextualMapper parameter serves two purposes: When
-        // contextualMapper is not undefined and not equal to the identityMapper function object it indicates that the
-        // expression is being inferentially typed (section 4.15.2 in spec) and provides the type mapper to use in
-        // conjunction with the generic contextual type. When contextualMapper is equal to the identityMapper function
-        // object, it serves as an indicator that all contained function and arrow expressions should be considered to
-        // have the wildcard function type; this form of type check is used during overload resolution to exclude
-        // contextually typed function and arrow expressions in the initial phase.
-        function checkExpression(node, contextualMapper) {
-            var type;
-            if (node.kind === 139 /* QualifiedName */) {
-                type = checkQualifiedName(node);
-            }
-            else {
-                var uninstantiatedType = checkExpressionWorker(node, contextualMapper);
-                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
-            }
-            if (isConstEnumObjectType(type)) {
-                // enum object type for const enums are only permitted in:
-                // - 'left' in property access
-                // - 'object' in indexed access
-                // - target in rhs of import statement
-                var ok = (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.expression === node) ||
-                    (node.parent.kind === 173 /* ElementAccessExpression */ && node.parent.expression === node) ||
-                    ((node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */) && isInRightSideOfImportOrExportAssignment(node));
-                if (!ok) {
-                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
-                }
-            }
-            return type;
-        }
-        function checkNumericLiteral(node) {
-            // Grammar checking
-            checkGrammarNumericLiteral(node);
-            return numberType;
-        }
-        function checkExpressionWorker(node, contextualMapper) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                    return checkIdentifier(node);
-                case 97 /* ThisKeyword */:
-                    return checkThisExpression(node);
-                case 95 /* SuperKeyword */:
-                    return checkSuperExpression(node);
-                case 93 /* NullKeyword */:
-                    return nullType;
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                    return booleanType;
-                case 8 /* NumericLiteral */:
-                    return checkNumericLiteral(node);
-                case 189 /* TemplateExpression */:
-                    return checkTemplateExpression(node);
-                case 9 /* StringLiteral */:
-                    return checkStringLiteralExpression(node);
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                    return stringType;
-                case 10 /* RegularExpressionLiteral */:
-                    return globalRegExpType;
-                case 170 /* ArrayLiteralExpression */:
-                    return checkArrayLiteral(node, contextualMapper);
-                case 171 /* ObjectLiteralExpression */:
-                    return checkObjectLiteral(node, contextualMapper);
-                case 172 /* PropertyAccessExpression */:
-                    return checkPropertyAccessExpression(node);
-                case 173 /* ElementAccessExpression */:
-                    return checkIndexedAccess(node);
-                case 174 /* CallExpression */:
-                case 175 /* NewExpression */:
-                    return checkCallExpression(node);
-                case 176 /* TaggedTemplateExpression */:
-                    return checkTaggedTemplateExpression(node);
-                case 178 /* ParenthesizedExpression */:
-                    return checkExpression(node.expression, contextualMapper);
-                case 192 /* ClassExpression */:
-                    return checkClassExpression(node);
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-                case 182 /* TypeOfExpression */:
-                    return checkTypeOfExpression(node);
-                case 177 /* TypeAssertionExpression */:
-                case 195 /* AsExpression */:
-                    return checkAssertion(node);
-                case 196 /* NonNullExpression */:
-                    return checkNonNullAssertion(node);
-                case 181 /* DeleteExpression */:
-                    return checkDeleteExpression(node);
-                case 183 /* VoidExpression */:
-                    return checkVoidExpression(node);
-                case 184 /* AwaitExpression */:
-                    return checkAwaitExpression(node);
-                case 185 /* PrefixUnaryExpression */:
-                    return checkPrefixUnaryExpression(node);
-                case 186 /* PostfixUnaryExpression */:
-                    return checkPostfixUnaryExpression(node);
-                case 187 /* BinaryExpression */:
-                    return checkBinaryExpression(node, contextualMapper);
-                case 188 /* ConditionalExpression */:
-                    return checkConditionalExpression(node, contextualMapper);
-                case 191 /* SpreadElementExpression */:
-                    return checkSpreadElementExpression(node, contextualMapper);
-                case 193 /* OmittedExpression */:
-                    return undefinedType;
-                case 190 /* YieldExpression */:
-                    return checkYieldExpression(node);
-                case 248 /* JsxExpression */:
-                    return checkJsxExpression(node);
-                case 241 /* JsxElement */:
-                    return checkJsxElement(node);
-                case 242 /* JsxSelfClosingElement */:
-                    return checkJsxSelfClosingElement(node);
-                case 243 /* JsxOpeningElement */:
-                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
-            }
-            return unknownType;
-        }
-        // DECLARATION AND STATEMENT TYPE CHECKING
-        function checkTypeParameter(node) {
-            // Grammar Checking
-            if (node.expression) {
-                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
-            }
-            checkSourceElement(node.constraint);
-            getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node)));
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
-            }
-        }
-        function checkParameter(node) {
-            // Grammar checking
-            // It is a SyntaxError if the Identifier "eval" or the Identifier "arguments" occurs as the
-            // Identifier in a PropertySetParameterList of a PropertyAssignment that is contained in strict code
-            // or if its FunctionBody is strict code(11.1.5).
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkVariableLikeDeclaration(node);
-            var func = ts.getContainingFunction(node);
-            if (node.flags & 92 /* ParameterPropertyModifier */) {
-                func = ts.getContainingFunction(node);
-                if (!(func.kind === 148 /* Constructor */ && ts.nodeIsPresent(func.body))) {
-                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
-                }
-            }
-            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
-                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
-            }
-            if (node.name.text === "this") {
-                if (ts.indexOf(func.parameters, node) !== 0) {
-                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
-                }
-                if (func.kind === 148 /* Constructor */ || func.kind === 152 /* ConstructSignature */ || func.kind === 157 /* ConstructorType */) {
-                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
-                }
-            }
-            // Only check rest parameter type if it's not a binding pattern. Since binding patterns are
-            // not allowed in a rest parameter, we already have an error from checkGrammarParameterList.
-            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
-                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
-            }
-        }
-        function isSyntacticallyValidGenerator(node) {
-            if (!node.asteriskToken || !node.body) {
-                return false;
-            }
-            return node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 220 /* FunctionDeclaration */ ||
-                node.kind === 179 /* FunctionExpression */;
-        }
-        function getTypePredicateParameterIndex(parameterList, parameter) {
-            if (parameterList) {
-                for (var i = 0; i < parameterList.length; i++) {
-                    var param = parameterList[i];
-                    if (param.name.kind === 69 /* Identifier */ &&
-                        param.name.text === parameter.text) {
-                        return i;
-                    }
-                }
-            }
-            return -1;
-        }
-        function checkTypePredicate(node) {
-            var parent = getTypePredicateParent(node);
-            if (!parent) {
-                // The parent must not be valid.
-                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
-                return;
-            }
-            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
-            if (!typePredicate) {
-                return;
-            }
-            var parameterName = node.parameterName;
-            if (ts.isThisTypePredicate(typePredicate)) {
-                getTypeFromThisTypeNode(parameterName);
-            }
-            else {
-                if (typePredicate.parameterIndex >= 0) {
-                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
-                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
-                    }
-                    else {
-                        var leadingError = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
-                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, 
-                        /*headMessage*/ undefined, leadingError);
-                    }
-                }
-                else if (parameterName) {
-                    var hasReportedError = false;
-                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
-                        var name_14 = _a[_i].name;
-                        if (ts.isBindingPattern(name_14) &&
-                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_14, parameterName, typePredicate.parameterName)) {
-                            hasReportedError = true;
-                            break;
-                        }
-                    }
-                    if (!hasReportedError) {
-                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
-                    }
-                }
-            }
-        }
-        function getTypePredicateParent(node) {
-            switch (node.parent.kind) {
-                case 180 /* ArrowFunction */:
-                case 151 /* CallSignature */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 156 /* FunctionType */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    var parent_10 = node.parent;
-                    if (node === parent_10.type) {
-                        return parent_10;
-                    }
-            }
-        }
-        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
-            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
-                var name_15 = _a[_i].name;
-                if (name_15.kind === 69 /* Identifier */ &&
-                    name_15.text === predicateVariableName) {
-                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
-                    return true;
-                }
-                else if (name_15.kind === 168 /* ArrayBindingPattern */ ||
-                    name_15.kind === 167 /* ObjectBindingPattern */) {
-                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_15, predicateVariableNode, predicateVariableName)) {
-                        return true;
-                    }
-                }
-            }
-        }
-        function checkSignatureDeclaration(node) {
-            // Grammar checking
-            if (node.kind === 153 /* IndexSignature */) {
-                checkGrammarIndexSignature(node);
-            }
-            else if (node.kind === 156 /* FunctionType */ || node.kind === 220 /* FunctionDeclaration */ || node.kind === 157 /* ConstructorType */ ||
-                node.kind === 151 /* CallSignature */ || node.kind === 148 /* Constructor */ ||
-                node.kind === 152 /* ConstructSignature */) {
-                checkGrammarFunctionLikeDeclaration(node);
-            }
-            checkTypeParameters(node.typeParameters);
-            ts.forEach(node.parameters, checkParameter);
-            if (node.type) {
-                checkSourceElement(node.type);
-            }
-            if (produceDiagnostics) {
-                checkCollisionWithArgumentsInGeneratedCode(node);
-                if (compilerOptions.noImplicitAny && !node.type) {
-                    switch (node.kind) {
-                        case 152 /* ConstructSignature */:
-                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
-                        case 151 /* CallSignature */:
-                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
-                    }
-                }
-                if (node.type) {
-                    if (languageVersion >= 2 /* ES6 */ && isSyntacticallyValidGenerator(node)) {
-                        var returnType = getTypeFromTypeNode(node.type);
-                        if (returnType === voidType) {
-                            error(node.type, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
-                        }
-                        else {
-                            var generatorElementType = getElementTypeOfIterableIterator(returnType) || anyType;
-                            var iterableIteratorInstantiation = createIterableIteratorType(generatorElementType);
-                            // Naively, one could check that IterableIterator<any> is assignable to the return type annotation.
-                            // However, that would not catch the error in the following case.
-                            //
-                            //    interface BadGenerator extends Iterable<number>, Iterator<string> { }
-                            //    function* g(): BadGenerator { } // Iterable and Iterator have different types!
-                            //
-                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, node.type);
-                        }
-                    }
-                    else if (ts.isAsyncFunctionLike(node)) {
-                        checkAsyncFunctionReturnType(node);
-                    }
-                }
-            }
-        }
-        function checkClassForDuplicateDeclarations(node) {
-            var getter = 1, setter = 2, property = getter | setter;
-            var instanceNames = {};
-            var staticNames = {};
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind === 148 /* Constructor */) {
-                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
-                        var param = _c[_b];
-                        if (ts.isParameterPropertyDeclaration(param)) {
-                            addName(instanceNames, param.name, param.name.text, property);
-                        }
-                    }
-                }
-                else {
-                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113 /* StaticKeyword */; });
-                    var names = static ? staticNames : instanceNames;
-                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
-                    if (memberName) {
-                        switch (member.kind) {
-                            case 149 /* GetAccessor */:
-                                addName(names, member.name, memberName, getter);
-                                break;
-                            case 150 /* SetAccessor */:
-                                addName(names, member.name, memberName, setter);
-                                break;
-                            case 145 /* PropertyDeclaration */:
-                                addName(names, member.name, memberName, property);
-                                break;
-                        }
-                    }
-                }
-            }
-            function addName(names, location, name, meaning) {
-                if (ts.hasProperty(names, name)) {
-                    var prev = names[name];
-                    if (prev & meaning) {
-                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
-                    }
-                    else {
-                        names[name] = prev | meaning;
-                    }
-                }
-                else {
-                    names[name] = meaning;
-                }
-            }
-        }
-        function checkObjectTypeForDuplicateDeclarations(node) {
-            var names = {};
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind == 144 /* PropertySignature */) {
-                    var memberName = void 0;
-                    switch (member.name.kind) {
-                        case 9 /* StringLiteral */:
-                        case 8 /* NumericLiteral */:
-                        case 69 /* Identifier */:
-                            memberName = member.name.text;
-                            break;
-                        default:
-                            continue;
-                    }
-                    if (ts.hasProperty(names, memberName)) {
-                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
-                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
-                    }
-                    else {
-                        names[memberName] = true;
-                    }
-                }
-            }
-        }
-        function checkTypeForDuplicateIndexSignatures(node) {
-            if (node.kind === 222 /* InterfaceDeclaration */) {
-                var nodeSymbol = getSymbolOfNode(node);
-                // in case of merging interface declaration it is possible that we'll enter this check procedure several times for every declaration
-                // to prevent this run check only for the first declaration of a given kind
-                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
-                    return;
-                }
-            }
-            // TypeScript 1.0 spec (April 2014)
-            // 3.7.4: An object type can contain at most one string index signature and one numeric index signature.
-            // 8.5: A class declaration can have at most one string index member declaration and one numeric index member declaration
-            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
-            if (indexSymbol) {
-                var seenNumericIndexer = false;
-                var seenStringIndexer = false;
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var declaration = decl;
-                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
-                        switch (declaration.parameters[0].type.kind) {
-                            case 132 /* StringKeyword */:
-                                if (!seenStringIndexer) {
-                                    seenStringIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
-                                }
-                                break;
-                            case 130 /* NumberKeyword */:
-                                if (!seenNumericIndexer) {
-                                    seenNumericIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
-                                }
-                                break;
-                        }
-                    }
-                }
-            }
-        }
-        function checkPropertyDeclaration(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
-            checkVariableLikeDeclaration(node);
-        }
-        function checkMethodDeclaration(node) {
-            // Grammar checking
-            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
-            // Grammar checking for modifiers is done inside the function checkGrammarFunctionLikeDeclaration
-            checkFunctionOrMethodDeclaration(node);
-            // Abstract methods cannot have an implementation.
-            // Extra checks are to avoid reporting multiple errors relating to the "abstractness" of the node.
-            if (node.flags & 128 /* Abstract */ && node.body) {
-                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
-            }
-        }
-        function checkConstructorDeclaration(node) {
-            // Grammar check on signature of constructor and modifier of the constructor is done in checkSignatureDeclaration function.
-            checkSignatureDeclaration(node);
-            // Grammar check for checking only related to constructorDeclaration
-            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
-            checkSourceElement(node.body);
-            var symbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
-            // Only type check the symbol once
-            if (node === firstDeclaration) {
-                checkFunctionOrConstructorSymbol(symbol);
-            }
-            // exit early in the case of signature - super checks are not relevant to them
-            if (ts.nodeIsMissing(node.body)) {
-                return;
-            }
-            if (!produceDiagnostics) {
-                return;
-            }
-            function containsSuperCallAsComputedPropertyName(n) {
-                return n.name && containsSuperCall(n.name);
-            }
-            function containsSuperCall(n) {
-                if (ts.isSuperCallExpression(n)) {
-                    return true;
-                }
-                else if (ts.isFunctionLike(n)) {
-                    return false;
-                }
-                else if (ts.isClassLike(n)) {
-                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
-                }
-                return ts.forEachChild(n, containsSuperCall);
-            }
-            function markThisReferencesAsErrors(n) {
-                if (n.kind === 97 /* ThisKeyword */) {
-                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
-                }
-                else if (n.kind !== 179 /* FunctionExpression */ && n.kind !== 220 /* FunctionDeclaration */) {
-                    ts.forEachChild(n, markThisReferencesAsErrors);
-                }
-            }
-            function isInstancePropertyWithInitializer(n) {
-                return n.kind === 145 /* PropertyDeclaration */ &&
-                    !(n.flags & 32 /* Static */) &&
-                    !!n.initializer;
-            }
-            // TS 1.0 spec (April 2014): 8.3.2
-            // Constructors of classes with no extends clause may not contain super calls, whereas
-            // constructors of derived classes must contain at least one super call somewhere in their function body.
-            var containingClassDecl = node.parent;
-            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
-                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
-                var superCall = getSuperCallInConstructor(node);
-                if (superCall) {
-                    if (classExtendsNull) {
-                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
-                    }
-                    // The first statement in the body of a constructor (excluding prologue directives) must be a super call
-                    // if both of the following are true:
-                    // - The containing class is a derived class.
-                    // - The constructor declares parameter properties
-                    //   or the containing class declares instance member variables with initializers.
-                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
-                        ts.forEach(node.parameters, function (p) { return p.flags & 92 /* ParameterPropertyModifier */; });
-                    // Skip past any prologue directives to find the first statement
-                    // to ensure that it was a super call.
-                    if (superCallShouldBeFirst) {
-                        var statements = node.body.statements;
-                        var superCallStatement = void 0;
-                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
-                            var statement = statements_2[_i];
-                            if (statement.kind === 202 /* ExpressionStatement */ && ts.isSuperCallExpression(statement.expression)) {
-                                superCallStatement = statement;
-                                break;
-                            }
-                            if (!ts.isPrologueDirective(statement)) {
-                                break;
-                            }
-                        }
-                        if (!superCallStatement) {
-                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
-                        }
-                    }
-                }
-                else if (!classExtendsNull) {
-                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
-                }
-            }
-        }
-        function checkAccessorDeclaration(node) {
-            if (produceDiagnostics) {
-                // Grammar checking accessors
-                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
-                checkDecorators(node);
-                checkSignatureDeclaration(node);
-                if (node.kind === 149 /* GetAccessor */) {
-                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 32768 /* HasImplicitReturn */)) {
-                        if (node.flags & 65536 /* HasExplicitReturn */) {
-                            if (compilerOptions.noImplicitReturns) {
-                                error(node.name, ts.Diagnostics.Not_all_code_paths_return_a_value);
-                            }
-                        }
-                        else {
-                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
-                        }
-                    }
-                }
-                // Do not use hasDynamicName here, because that returns false for well known symbols.
-                // We want to perform checkComputedPropertyName for all computed properties, including
-                // well known symbols.
-                if (node.name.kind === 140 /* ComputedPropertyName */) {
-                    checkComputedPropertyName(node.name);
-                }
-                if (!ts.hasDynamicName(node)) {
-                    // TypeScript 1.0 spec (April 2014): 8.4.3
-                    // Accessors for the same member name must specify the same accessibility.
-                    var otherKind = node.kind === 149 /* GetAccessor */ ? 150 /* SetAccessor */ : 149 /* GetAccessor */;
-                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
-                    if (otherAccessor) {
-                        if (((node.flags & 28 /* AccessibilityModifier */) !== (otherAccessor.flags & 28 /* AccessibilityModifier */))) {
-                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
-                        }
-                        if (((node.flags & 128 /* Abstract */) !== (otherAccessor.flags & 128 /* Abstract */))) {
-                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
-                        }
-                        // TypeScript 1.0 spec (April 2014): 4.5
-                        // If both accessors include type annotations, the specified types must be identical.
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorThisType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
-                    }
-                }
-                getTypeOfAccessors(getSymbolOfNode(node));
-            }
-            if (node.parent.kind !== 171 /* ObjectLiteralExpression */) {
-                checkSourceElement(node.body);
-            }
-            else {
-                checkNodeDeferred(node);
-            }
-        }
-        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
-            var firstType = getAnnotatedType(first);
-            var secondType = getAnnotatedType(second);
-            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
-                error(first, message);
-            }
-        }
-        function checkAccessorDeferred(node) {
-            checkSourceElement(node.body);
-        }
-        function checkMissingDeclaration(node) {
-            checkDecorators(node);
-        }
-        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
-            var typeArguments;
-            var mapper;
-            var result = true;
-            for (var i = 0; i < typeParameters.length; i++) {
-                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                if (constraint) {
-                    if (!typeArguments) {
-                        typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
-                        mapper = createTypeMapper(typeParameters, typeArguments);
-                    }
-                    var typeArgument = typeArguments[i];
-                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
-                }
-            }
-            return result;
-        }
-        function checkTypeReferenceNode(node) {
-            checkGrammarTypeArguments(node, node.typeArguments);
-            var type = getTypeFromTypeReference(node);
-            if (type !== unknownType && node.typeArguments) {
-                // Do type argument local checks only if referenced type is successfully resolved
-                ts.forEach(node.typeArguments, checkSourceElement);
-                if (produceDiagnostics) {
-                    var symbol = getNodeLinks(node).resolvedSymbol;
-                    var typeParameters = symbol.flags & 524288 /* TypeAlias */ ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
-                    checkTypeArgumentConstraints(typeParameters, node.typeArguments);
-                }
-            }
-        }
-        function checkTypeQuery(node) {
-            getTypeFromTypeQueryNode(node);
-        }
-        function checkTypeLiteral(node) {
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-                checkObjectTypeForDuplicateDeclarations(node);
-            }
-        }
-        function checkArrayType(node) {
-            checkSourceElement(node.elementType);
-        }
-        function checkTupleType(node) {
-            // Grammar checking
-            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
-            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
-                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
-            }
-            ts.forEach(node.elementTypes, checkSourceElement);
-        }
-        function checkUnionOrIntersectionType(node) {
-            ts.forEach(node.types, checkSourceElement);
-        }
-        function isPrivateWithinAmbient(node) {
-            return (node.flags & 8 /* Private */) && ts.isInAmbientContext(node);
-        }
-        function getEffectiveDeclarationFlags(n, flagsToCheck) {
-            var flags = ts.getCombinedNodeFlags(n);
-            // children of classes (even ambient classes) should not be marked as ambient or export
-            // because those flags have no useful semantics there.
-            if (n.parent.kind !== 222 /* InterfaceDeclaration */ &&
-                n.parent.kind !== 221 /* ClassDeclaration */ &&
-                n.parent.kind !== 192 /* ClassExpression */ &&
-                ts.isInAmbientContext(n)) {
-                if (!(flags & 2 /* Ambient */)) {
-                    // It is nested in an ambient context, which means it is automatically exported
-                    flags |= 1 /* Export */;
-                }
-                flags |= 2 /* Ambient */;
-            }
-            return flags & flagsToCheck;
-        }
-        function checkFunctionOrConstructorSymbol(symbol) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            function getCanonicalOverload(overloads, implementation) {
-                // Consider the canonical set of flags to be the flags of the bodyDeclaration or the first declaration
-                // Error on all deviations from this canonical set of flags
-                // The caveat is that if some overloads are defined in lib.d.ts, we don't want to
-                // report the errors on those. To achieve this, we will say that the implementation is
-                // the canonical signature only if it is in the same container as the first overload
-                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
-                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
-            }
-            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
-                // Error if some overloads have a flag that is not shared by all overloads. To find the
-                // deviations, we XOR someOverloadFlags with allOverloadFlags
-                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
-                if (someButNotAllOverloadFlags !== 0) {
-                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
-                    ts.forEach(overloads, function (o) {
-                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
-                        if (deviation & 1 /* Export */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
-                        }
-                        else if (deviation & 2 /* Ambient */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
-                        }
-                        else if (deviation & (8 /* Private */ | 16 /* Protected */)) {
-                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
-                        }
-                        else if (deviation & 128 /* Abstract */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
-                        }
-                    });
-                }
-            }
-            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
-                if (someHaveQuestionToken !== allHaveQuestionToken) {
-                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
-                    ts.forEach(overloads, function (o) {
-                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
-                        if (deviation) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
-                        }
-                    });
-                }
-            }
-            var flagsToCheck = 1 /* Export */ | 2 /* Ambient */ | 8 /* Private */ | 16 /* Protected */ | 128 /* Abstract */;
-            var someNodeFlags = 0;
-            var allNodeFlags = flagsToCheck;
-            var someHaveQuestionToken = false;
-            var allHaveQuestionToken = true;
-            var hasOverloads = false;
-            var bodyDeclaration;
-            var lastSeenNonAmbientDeclaration;
-            var previousDeclaration;
-            var declarations = symbol.declarations;
-            var isConstructor = (symbol.flags & 16384 /* Constructor */) !== 0;
-            function reportImplementationExpectedError(node) {
-                if (node.name && ts.nodeIsMissing(node.name)) {
-                    return;
-                }
-                var seen = false;
-                var subsequentNode = ts.forEachChild(node.parent, function (c) {
-                    if (seen) {
-                        return c;
-                    }
-                    else {
-                        seen = c === node;
-                    }
-                });
-                // We may be here because of some extra nodes between overloads that could not be parsed into a valid node.
-                // In this case the subsequent node is not really consecutive (.pos !== node.end), and we must ignore it here.
-                if (subsequentNode && subsequentNode.pos === node.end) {
-                    if (subsequentNode.kind === node.kind) {
-                        var errorNode_1 = subsequentNode.name || subsequentNode;
-                        // TODO(jfreeman): These are methods, so handle computed name case
-                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
-                            var reportError = (node.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) &&
-                                (node.flags & 32 /* Static */) !== (subsequentNode.flags & 32 /* Static */);
-                            // we can get here in two cases
-                            // 1. mixed static and instance class members
-                            // 2. something with the same name was defined before the set of overloads that prevents them from merging
-                            // here we'll report error only for the first case since for second we should already report error in binder
-                            if (reportError) {
-                                var diagnostic = node.flags & 32 /* Static */ ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
-                                error(errorNode_1, diagnostic);
-                            }
-                            return;
-                        }
-                        else if (ts.nodeIsPresent(subsequentNode.body)) {
-                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
-                            return;
-                        }
-                    }
-                }
-                var errorNode = node.name || node;
-                if (isConstructor) {
-                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
-                }
-                else {
-                    // Report different errors regarding non-consecutive blocks of declarations depending on whether
-                    // the node in question is abstract.
-                    if (node.flags & 128 /* Abstract */) {
-                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
-                    }
-                    else {
-                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
-                    }
-                }
-            }
-            // when checking exported function declarations across modules check only duplicate implementations
-            // names and consistency of modifiers are verified when we check local symbol
-            var isExportSymbolInsideModule = symbol.parent && symbol.parent.flags & 1536 /* Module */;
-            var duplicateFunctionDeclaration = false;
-            var multipleConstructorImplementation = false;
-            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
-                var current = declarations_4[_i];
-                var node = current;
-                var inAmbientContext = ts.isInAmbientContext(node);
-                var inAmbientContextOrInterface = node.parent.kind === 222 /* InterfaceDeclaration */ || node.parent.kind === 159 /* TypeLiteral */ || inAmbientContext;
-                if (inAmbientContextOrInterface) {
-                    // check if declarations are consecutive only if they are non-ambient
-                    // 1. ambient declarations can be interleaved
-                    // i.e. this is legal
-                    //     declare function foo();
-                    //     declare function bar();
-                    //     declare function foo();
-                    // 2. mixing ambient and non-ambient declarations is a separate error that will be reported - do not want to report an extra one
-                    previousDeclaration = undefined;
-                }
-                if (node.kind === 220 /* FunctionDeclaration */ || node.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */ || node.kind === 148 /* Constructor */) {
-                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
-                    someNodeFlags |= currentNodeFlags;
-                    allNodeFlags &= currentNodeFlags;
-                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
-                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
-                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
-                        if (isConstructor) {
-                            multipleConstructorImplementation = true;
-                        }
-                        else {
-                            duplicateFunctionDeclaration = true;
-                        }
-                    }
-                    else if (!isExportSymbolInsideModule && previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
-                        reportImplementationExpectedError(previousDeclaration);
-                    }
-                    if (ts.nodeIsPresent(node.body)) {
-                        if (!bodyDeclaration) {
-                            bodyDeclaration = node;
-                        }
-                    }
-                    else {
-                        hasOverloads = true;
-                    }
-                    previousDeclaration = node;
-                    if (!inAmbientContextOrInterface) {
-                        lastSeenNonAmbientDeclaration = node;
-                    }
-                }
-            }
-            if (multipleConstructorImplementation) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
-                });
-            }
-            if (duplicateFunctionDeclaration) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
-                });
-            }
-            // Abstract methods can't have an implementation -- in particular, they don't need one.
-            if (!isExportSymbolInsideModule && lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
-                !(lastSeenNonAmbientDeclaration.flags & 128 /* Abstract */) && !lastSeenNonAmbientDeclaration.questionToken) {
-                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
-            }
-            if (hasOverloads) {
-                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
-                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
-                if (bodyDeclaration) {
-                    var signatures = getSignaturesOfSymbol(symbol);
-                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
-                    for (var _a = 0, signatures_3 = signatures; _a < signatures_3.length; _a++) {
-                        var signature = signatures_3[_a];
-                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
-                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
-                            break;
-                        }
-                    }
-                }
-            }
-        }
-        function checkExportsOnMergedDeclarations(node) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            // if localSymbol is defined on node then node itself is exported - check is required
-            var symbol = node.localSymbol;
-            if (!symbol) {
-                // local symbol is undefined => this declaration is non-exported.
-                // however symbol might contain other declarations that are exported
-                symbol = getSymbolOfNode(node);
-                if (!(symbol.flags & 7340032 /* Export */)) {
-                    // this is a pure local symbol (all declarations are non-exported) - no need to check anything
-                    return;
-                }
-            }
-            // run the check only for the first declaration in the list
-            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
-                return;
-            }
-            // we use SymbolFlags.ExportValue, SymbolFlags.ExportType and SymbolFlags.ExportNamespace
-            // to denote disjoint declarationSpaces (without making new enum type).
-            var exportedDeclarationSpaces = 0 /* None */;
-            var nonExportedDeclarationSpaces = 0 /* None */;
-            var defaultExportedDeclarationSpaces = 0 /* None */;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var d = _a[_i];
-                var declarationSpaces = getDeclarationSpaces(d);
-                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 /* Export */ | 512 /* Default */);
-                if (effectiveDeclarationFlags & 1 /* Export */) {
-                    if (effectiveDeclarationFlags & 512 /* Default */) {
-                        defaultExportedDeclarationSpaces |= declarationSpaces;
-                    }
-                    else {
-                        exportedDeclarationSpaces |= declarationSpaces;
-                    }
-                }
-                else {
-                    nonExportedDeclarationSpaces |= declarationSpaces;
-                }
-            }
-            // Spaces for anything not declared a 'default export'.
-            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
-            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
-                // declaration spaces for exported and non-exported declarations intersect
-                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
-                    var d = _c[_b];
-                    var declarationSpaces = getDeclarationSpaces(d);
-                    // Only error on the declarations that contributed to the intersecting spaces.
-                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
-                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
-                    }
-                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
-                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
-                    }
-                }
-            }
-            function getDeclarationSpaces(d) {
-                switch (d.kind) {
-                    case 222 /* InterfaceDeclaration */:
-                        return 2097152 /* ExportType */;
-                    case 225 /* ModuleDeclaration */:
-                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0 /* NonInstantiated */
-                            ? 4194304 /* ExportNamespace */ | 1048576 /* ExportValue */
-                            : 4194304 /* ExportNamespace */;
-                    case 221 /* ClassDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                        return 2097152 /* ExportType */ | 1048576 /* ExportValue */;
-                    case 229 /* ImportEqualsDeclaration */:
-                        var result_1 = 0;
-                        var target = resolveAlias(getSymbolOfNode(d));
-                        ts.forEach(target.declarations, function (d) { result_1 |= getDeclarationSpaces(d); });
-                        return result_1;
-                    default:
-                        return 1048576 /* ExportValue */;
-                }
-            }
-        }
-        function checkNonThenableType(type, location, message) {
-            type = getWidenedType(type);
-            if (!isTypeAny(type) && isTypeAssignableTo(type, getGlobalThenableType())) {
-                if (location) {
-                    if (!message) {
-                        message = ts.Diagnostics.Operand_for_await_does_not_have_a_valid_callable_then_member;
-                    }
-                    error(location, message);
-                }
-                return unknownType;
-            }
-            return type;
-        }
-        /**
-          * Gets the "promised type" of a promise.
-          * @param type The type of the promise.
-          * @remarks The "promised type" of a type is the type of the "value" parameter of the "onfulfilled" callback.
-          */
-        function getPromisedType(promise) {
-            //
-            //  { // promise
-            //      then( // thenFunction
-            //          onfulfilled: ( // onfulfilledParameterType
-            //              value: T // valueParameterType
-            //          ) => any
-            //      ): any;
-            //  }
-            //
-            if (promise.flags & 1 /* Any */) {
-                return undefined;
-            }
-            if ((promise.flags & 4096 /* Reference */) && promise.target === tryGetGlobalPromiseType()) {
-                return promise.typeArguments[0];
-            }
-            var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType();
-            if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) {
-                return undefined;
-            }
-            var thenFunction = getTypeOfPropertyOfType(promise, "then");
-            if (thenFunction && (thenFunction.flags & 1 /* Any */)) {
-                return undefined;
-            }
-            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0 /* Call */) : emptyArray;
-            if (thenSignatures.length === 0) {
-                return undefined;
-            }
-            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072 /* NEUndefined */);
-            if (onfulfilledParameterType.flags & 1 /* Any */) {
-                return undefined;
-            }
-            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0 /* Call */);
-            if (onfulfilledParameterSignatures.length === 0) {
-                return undefined;
-            }
-            var valueParameterType = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature));
-            return valueParameterType;
-        }
-        function getTypeOfFirstParameterOfSignature(signature) {
-            return getTypeAtPosition(signature, 0);
-        }
-        /**
-          * Gets the "awaited type" of a type.
-          * @param type The type to await.
-          * @remarks The "awaited type" of an expression is its "promised type" if the expression is a
-          * Promise-like type; otherwise, it is the type of the expression. This is used to reflect
-          * The runtime behavior of the `await` keyword.
-          */
-        function getAwaitedType(type) {
-            return checkAwaitedType(type, /*location*/ undefined, /*message*/ undefined);
-        }
-        function checkAwaitedType(type, location, message) {
-            return checkAwaitedTypeWorker(type);
-            function checkAwaitedTypeWorker(type) {
-                if (type.flags & 16384 /* Union */) {
-                    var types = [];
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var constituentType = _a[_i];
-                        types.push(checkAwaitedTypeWorker(constituentType));
-                    }
-                    return getUnionType(types);
-                }
-                else {
-                    var promisedType = getPromisedType(type);
-                    if (promisedType === undefined) {
-                        // The type was not a PromiseLike, so it could not be unwrapped any further.
-                        // As long as the type does not have a callable "then" property, it is
-                        // safe to return the type; otherwise, an error will have been reported in
-                        // the call to checkNonThenableType and we will return unknownType.
-                        //
-                        // An example of a non-promise "thenable" might be:
-                        //
-                        //  await { then(): void {} }
-                        //
-                        // The "thenable" does not match the minimal definition for a PromiseLike. When
-                        // a Promise/A+-compatible or ES6 promise tries to adopt this value, the promise
-                        // will never settle. We treat this as an error to help flag an early indicator
-                        // of a runtime problem. If the user wants to return this value from an async
-                        // function, they would need to wrap it in some other value. If they want it to
-                        // be treated as a promise, they can cast to <any>.
-                        return checkNonThenableType(type, location, message);
-                    }
-                    else {
-                        if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
-                            // We have a bad actor in the form of a promise whose promised type is
-                            // the same promise type, or a mutually recursive promise. Return the
-                            // unknown type as we cannot guess the shape. If this were the actual
-                            // case in the JavaScript, this Promise would never resolve.
-                            //
-                            // An example of a bad actor with a singly-recursive promise type might
-                            // be:
-                            //
-                            //  interface BadPromise {
-                            //      then(
-                            //          onfulfilled: (value: BadPromise) => any,
-                            //          onrejected: (error: any) => any): BadPromise;
-                            //  }
-                            //
-                            // The above interface will pass the PromiseLike check, and return a
-                            // promised type of `BadPromise`. Since this is a self reference, we
-                            // don't want to keep recursing ad infinitum.
-                            //
-                            // An example of a bad actor in the form of a mutually-recursive
-                            // promise type might be:
-                            //
-                            //  interface BadPromiseA {
-                            //      then(
-                            //          onfulfilled: (value: BadPromiseB) => any,
-                            //          onrejected: (error: any) => any): BadPromiseB;
-                            //  }
-                            //
-                            //  interface BadPromiseB {
-                            //      then(
-                            //          onfulfilled: (value: BadPromiseA) => any,
-                            //          onrejected: (error: any) => any): BadPromiseA;
-                            //  }
-                            //
-                            if (location) {
-                                error(location, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method, symbolToString(type.symbol));
-                            }
-                            return unknownType;
-                        }
-                        // Keep track of the type we're about to unwrap to avoid bad recursive promise types.
-                        // See the comments above for more information.
-                        awaitedTypeStack.push(type.id);
-                        var awaitedType = checkAwaitedTypeWorker(promisedType);
-                        awaitedTypeStack.pop();
-                        return awaitedType;
-                    }
-                }
-            }
-        }
-        /**
-         * Checks that the return type provided is an instantiation of the global Promise<T> type
-         * and returns the awaited type of the return type.
-         *
-         * @param returnType The return type of a FunctionLikeDeclaration
-         * @param location The node on which to report the error.
-         */
-        function checkCorrectPromiseType(returnType, location) {
-            if (returnType === unknownType) {
-                // The return type already had some other error, so we ignore and return
-                // the unknown type.
-                return unknownType;
-            }
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType === emptyGenericType
-                || globalPromiseType === getTargetType(returnType)) {
-                // Either we couldn't resolve the global promise type, which would have already
-                // reported an error, or we could resolve it and the return type is a valid type
-                // reference to the global type. In either case, we return the awaited type for
-                // the return type.
-                return checkAwaitedType(returnType, location, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-            }
-            // The promise type was not a valid type reference to the global promise type, so we
-            // report an error and return the unknown type.
-            error(location, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
-            return unknownType;
-        }
-        /**
-          * Checks the return type of an async function to ensure it is a compatible
-          * Promise implementation.
-          * @param node The signature to check
-          * @param returnType The return type for the function
-          * @remarks
-          * This checks that an async function has a valid Promise-compatible return type,
-          * and returns the *awaited type* of the promise. An async function has a valid
-          * Promise-compatible return type if the resolved value of the return type has a
-          * construct signature that takes in an `initializer` function that in turn supplies
-          * a `resolve` function as one of its arguments and results in an object with a
-          * callable `then` signature.
-          */
-        function checkAsyncFunctionReturnType(node) {
-            if (languageVersion >= 2 /* ES6 */) {
-                var returnType = getTypeFromTypeNode(node.type);
-                return checkCorrectPromiseType(returnType, node.type);
-            }
-            var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType();
-            if (globalPromiseConstructorLikeType === emptyObjectType) {
-                // If we couldn't resolve the global PromiseConstructorLike type we cannot verify
-                // compatibility with __awaiter.
-                return unknownType;
-            }
-            // As part of our emit for an async function, we will need to emit the entity name of
-            // the return type annotation as an expression. To meet the necessary runtime semantics
-            // for __awaiter, we must also check that the type of the declaration (e.g. the static
-            // side or "constructor" of the promise type) is compatible `PromiseConstructorLike`.
-            //
-            // An example might be (from lib.es6.d.ts):
-            //
-            //  interface Promise<T> { ... }
-            //  interface PromiseConstructor {
-            //      new <T>(...): Promise<T>;
-            //  }
-            //  declare var Promise: PromiseConstructor;
-            //
-            // When an async function declares a return type annotation of `Promise<T>`, we
-            // need to get the type of the `Promise` variable declaration above, which would
-            // be `PromiseConstructor`.
-            //
-            // The same case applies to a class:
-            //
-            //  declare class Promise<T> {
-            //      constructor(...);
-            //      then<U>(...): Promise<U>;
-            //  }
-            //
-            // When we get the type of the `Promise` symbol here, we get the type of the static
-            // side of the `Promise` class, which would be `{ new <T>(...): Promise<T> }`.
-            var promiseType = getTypeFromTypeNode(node.type);
-            if (promiseType === unknownType && compilerOptions.isolatedModules) {
-                // If we are compiling with isolatedModules, we may not be able to resolve the
-                // type as a value. As such, we will just return unknownType;
-                return unknownType;
-            }
-            var promiseConstructor = getNodeLinks(node.type).resolvedSymbol;
-            if (!promiseConstructor || !symbolIsValue(promiseConstructor)) {
-                var typeName = promiseConstructor
-                    ? symbolToString(promiseConstructor)
-                    : typeToString(promiseType);
-                error(node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName);
-                return unknownType;
-            }
-            // If the Promise constructor, resolved locally, is an alias symbol we should mark it as referenced.
-            checkReturnTypeAnnotationAsExpression(node);
-            // Validate the promise constructor type.
-            var promiseConstructorType = getTypeOfSymbol(promiseConstructor);
-            if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) {
-                return unknownType;
-            }
-            // Verify there is no local declaration that could collide with the promise constructor.
-            var promiseName = ts.getEntityNameFromTypeNode(node.type);
-            var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName);
-            var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455 /* Value */);
-            if (rootSymbol) {
-                error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor));
-                return unknownType;
-            }
-            // Get and return the awaited type of the return type.
-            return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-        }
-        /** Check a decorator */
-        function checkDecorator(node) {
-            var signature = getResolvedSignature(node);
-            var returnType = getReturnTypeOfSignature(signature);
-            if (returnType.flags & 1 /* Any */) {
-                return;
-            }
-            var expectedReturnType;
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            var errorInfo;
-            switch (node.parent.kind) {
-                case 221 /* ClassDeclaration */:
-                    var classSymbol = getSymbolOfNode(node.parent);
-                    var classConstructorType = getTypeOfSymbol(classSymbol);
-                    expectedReturnType = getUnionType([classConstructorType, voidType]);
-                    break;
-                case 142 /* Parameter */:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 145 /* PropertyDeclaration */:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 147 /* MethodDeclaration */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    var methodType = getTypeOfNode(node.parent);
-                    var descriptorType = createTypedPropertyDescriptorType(methodType);
-                    expectedReturnType = getUnionType([descriptorType, voidType]);
-                    break;
-            }
-            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
-        }
-        /** Checks a type reference node as an expression. */
-        function checkTypeNodeAsExpression(node) {
-            // When we are emitting type metadata for decorators, we need to try to check the type
-            // as if it were an expression so that we can emit the type in a value position when we
-            // serialize the type metadata.
-            if (node && node.kind === 155 /* TypeReference */) {
-                var root = getFirstIdentifier(node.typeName);
-                var meaning = root.parent.kind === 155 /* TypeReference */ ? 793056 /* Type */ : 1536 /* Namespace */;
-                // Resolve type so we know which symbol is referenced
-                var rootSymbol = resolveName(root, root.text, meaning | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-                // Resolved symbol is alias
-                if (rootSymbol && rootSymbol.flags & 8388608 /* Alias */) {
-                    var aliasTarget = resolveAlias(rootSymbol);
-                    // If alias has value symbol - mark alias as referenced
-                    if (aliasTarget.flags & 107455 /* Value */ && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
-                        markAliasSymbolAsReferenced(rootSymbol);
-                    }
-                }
-            }
-        }
-        /**
-          * Checks the type annotation of an accessor declaration or property declaration as
-          * an expression if it is a type reference to a type with a value declaration.
-          */
-        function checkTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        function checkReturnTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        /** Checks the type annotation of the parameters of a function/method or the constructor of a class as expressions */
-        function checkParameterTypeAnnotationsAsExpressions(node) {
-            // ensure all type annotations with a value declaration are checked as an expression
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                checkTypeAnnotationAsExpression(parameter);
-            }
-        }
-        /** Check the decorators of a node */
-        function checkDecorators(node) {
-            if (!node.decorators) {
-                return;
-            }
-            // skip this check for nodes that cannot have decorators. These should have already had an error reported by
-            // checkGrammarDecorators.
-            if (!ts.nodeCanBeDecorated(node)) {
-                return;
-            }
-            if (!compilerOptions.experimentalDecorators) {
-                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
-            }
-            if (compilerOptions.emitDecoratorMetadata) {
-                // we only need to perform these checks if we are emitting serialized type metadata for the target of a decorator.
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                        var constructor = ts.getFirstConstructorWithBody(node);
-                        if (constructor) {
-                            checkParameterTypeAnnotationsAsExpressions(constructor);
-                        }
-                        break;
-                    case 147 /* MethodDeclaration */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        checkParameterTypeAnnotationsAsExpressions(node);
-                        checkReturnTypeAnnotationAsExpression(node);
-                        break;
-                    case 145 /* PropertyDeclaration */:
-                    case 142 /* Parameter */:
-                        checkTypeAnnotationAsExpression(node);
-                        break;
-                }
-            }
-            ts.forEach(node.decorators, checkDecorator);
-        }
-        function checkFunctionDeclaration(node) {
-            if (produceDiagnostics) {
-                checkFunctionOrMethodDeclaration(node) || checkGrammarForGenerator(node);
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-        }
-        function checkFunctionOrMethodDeclaration(node) {
-            checkDecorators(node);
-            checkSignatureDeclaration(node);
-            var isAsync = ts.isAsyncFunctionLike(node);
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name && node.name.kind === 140 /* ComputedPropertyName */) {
-                // This check will account for methods in class/interface declarations,
-                // as well as accessors in classes/object literals
-                checkComputedPropertyName(node.name);
-            }
-            if (!ts.hasDynamicName(node)) {
-                // first we want to check the local symbol that contain this declaration
-                // - if node.localSymbol !== undefined - this is current declaration is exported and localSymbol points to the local symbol
-                // - if node.localSymbol === undefined - this node is non-exported so we can just pick the result of getSymbolOfNode
-                var symbol = getSymbolOfNode(node);
-                var localSymbol = node.localSymbol || symbol;
-                // Since the javascript won't do semantic analysis like typescript,
-                // if the javascript file comes before the typescript file and both contain same name functions,
-                // checkFunctionOrConstructorSymbol wouldn't be called if we didnt ignore javascript function.
-                var firstDeclaration = ts.forEach(localSymbol.declarations, 
-                // Get first non javascript function declaration
-                function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
-                    declaration : undefined; });
-                // Only type check the symbol once
-                if (node === firstDeclaration) {
-                    checkFunctionOrConstructorSymbol(localSymbol);
-                }
-                if (symbol.parent) {
-                    // run check once for the first declaration
-                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
-                        // run check on export symbol to check that modifiers agree across all exported declarations
-                        checkFunctionOrConstructorSymbol(symbol);
-                    }
-                }
-            }
-            checkSourceElement(node.body);
-            if (!node.asteriskToken) {
-                var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (produceDiagnostics && !node.type) {
-                // Report an implicit any error if there is no body, no explicit return type, and node is not a private method
-                // in an ambient context
-                if (compilerOptions.noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
-                    reportImplicitAnyError(node, anyType);
-                }
-                if (node.asteriskToken && ts.nodeIsPresent(node.body)) {
-                    // A generator with a body and no type annotation can still cause errors. It can error if the
-                    // yielded values have no common supertype, or it can give an implicit any error if it has no
-                    // yielded values. The only way to trigger these errors is to try checking its return type.
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
-                }
-            }
-        }
-        function checkBlock(node) {
-            // Grammar checking for SyntaxKind.Block
-            if (node.kind === 199 /* Block */) {
-                checkGrammarStatementInAmbientContext(node);
-            }
-            ts.forEach(node.statements, checkSourceElement);
-        }
-        function checkCollisionWithArgumentsInGeneratedCode(node) {
-            // no rest parameters \ declaration context \ overload - no codegen impact
-            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
-                return;
-            }
-            ts.forEach(node.parameters, function (p) {
-                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
-                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
-                }
-            });
-        }
-        function needCollisionCheckForIdentifier(node, identifier, name) {
-            if (!(identifier && identifier.text === name)) {
-                return false;
-            }
-            if (node.kind === 145 /* PropertyDeclaration */ ||
-                node.kind === 144 /* PropertySignature */ ||
-                node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 146 /* MethodSignature */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // it is ok to have member named '_super' or '_this' - member access is always qualified
-                return false;
-            }
-            if (ts.isInAmbientContext(node)) {
-                // ambient context - no codegen impact
-                return false;
-            }
-            var root = ts.getRootDeclaration(node);
-            if (root.kind === 142 /* Parameter */ && ts.nodeIsMissing(root.parent.body)) {
-                // just an overload - no codegen impact
-                return false;
-            }
-            return true;
-        }
-        function checkCollisionWithCapturedThisVariable(node, name) {
-            if (needCollisionCheckForIdentifier(node, name, "_this")) {
-                potentialThisCollisions.push(node);
-            }
-        }
-        // this function will run after checking the source file so 'CaptureThis' is correct for all nodes
-        function checkIfThisIsCapturedInEnclosingScope(node) {
-            var current = node;
-            while (current) {
-                if (getNodeCheckFlags(current) & 4 /* CaptureThis */) {
-                    var isDeclaration_1 = node.kind !== 69 /* Identifier */;
-                    if (isDeclaration_1) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
-                    }
-                    else {
-                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
-                    }
-                    return;
-                }
-                current = current.parent;
-            }
-        }
-        function checkCollisionWithCapturedSuperVariable(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
-                return;
-            }
-            // bubble up and find containing type
-            var enclosingClass = ts.getContainingClass(node);
-            // if containing type was not found or it is ambient - exit (no codegen)
-            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
-                return;
-            }
-            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
-                var isDeclaration_2 = node.kind !== 69 /* Identifier */;
-                if (isDeclaration_2) {
-                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
-                }
-                else {
-                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
-                }
-            }
-        }
-        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
-                return;
-            }
-            // Uninstantiated modules shouldnt do this check
-            if (node.kind === 225 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
-                return;
-            }
-            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent)) {
-                // If the declaration happens to be in external module, report error that require and exports are reserved keywords
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
-            }
-        }
-        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "Promise")) {
-                return;
-            }
-            // Uninstantiated modules shouldnt do this check
-            if (node.kind === 225 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
-                return;
-            }
-            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent) && parent.flags & 2097152 /* HasAsyncFunctions */) {
-                // If the declaration happens to be in external module, report error that Promise is a reserved identifier.
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
-            }
-        }
-        function checkVarDeclaredNamesNotShadowed(node) {
-            // - ScriptBody : StatementList
-            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
-            // also occurs in the VarDeclaredNames of StatementList.
-            // - Block : { StatementList }
-            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
-            // also occurs in the VarDeclaredNames of StatementList.
-            // Variable declarations are hoisted to the top of their function scope. They can shadow
-            // block scoped declarations, which bind tighter. this will not be flagged as duplicate definition
-            // by the binder as the declaration scope is different.
-            // A non-initialized declaration is a no-op as the block declaration will resolve before the var
-            // declaration. the problem is if the declaration has an initializer. this will act as a write to the
-            // block declared value. this is fine for let, but not const.
-            // Only consider declarations with initializers, uninitialized const declarations will not
-            // step on a let/const variable.
-            // Do not consider const and const declarations, as duplicate block-scoped declarations
-            // are handled by the binder.
-            // We are only looking for const declarations that step on let\const declarations from a
-            // different scope. e.g.:
-            //      {
-            //          const x = 0; // localDeclarationSymbol obtained after name resolution will correspond to this declaration
-            //          const x = 0; // symbol for this declaration will be 'symbol'
-            //      }
-            // skip block-scoped variables and parameters
-            if ((ts.getCombinedNodeFlags(node) & 3072 /* BlockScoped */) !== 0 || ts.isParameterDeclaration(node)) {
-                return;
-            }
-            // skip variable declarations that don't have initializers
-            // NOTE: in ES6 spec initializer is required in variable declarations where name is binding pattern
-            // so we'll always treat binding elements as initialized
-            if (node.kind === 218 /* VariableDeclaration */ && !node.initializer) {
-                return;
-            }
-            var symbol = getSymbolOfNode(node);
-            if (symbol.flags & 1 /* FunctionScopedVariable */) {
-                var localDeclarationSymbol = resolveName(node, node.name.text, 3 /* Variable */, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
-                if (localDeclarationSymbol &&
-                    localDeclarationSymbol !== symbol &&
-                    localDeclarationSymbol.flags & 2 /* BlockScopedVariable */) {
-                    if (getDeclarationFlagsFromSymbol(localDeclarationSymbol) & 3072 /* BlockScoped */) {
-                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 219 /* VariableDeclarationList */);
-                        var container = varDeclList.parent.kind === 200 /* VariableStatement */ && varDeclList.parent.parent
-                            ? varDeclList.parent.parent
-                            : undefined;
-                        // names of block-scoped and function scoped variables can collide only
-                        // if block scoped variable is defined in the function\module\source file scope (because of variable hoisting)
-                        var namesShareScope = container &&
-                            (container.kind === 199 /* Block */ && ts.isFunctionLike(container.parent) ||
-                                container.kind === 226 /* ModuleBlock */ ||
-                                container.kind === 225 /* ModuleDeclaration */ ||
-                                container.kind === 256 /* SourceFile */);
-                        // here we know that function scoped variable is shadowed by block scoped one
-                        // if they are defined in the same scope - binder has already reported redeclaration error
-                        // otherwise if variable has an initializer - show error that initialization will fail
-                        // since LHS will be block scoped name instead of function scoped
-                        if (!namesShareScope) {
-                            var name_16 = symbolToString(localDeclarationSymbol);
-                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_16, name_16);
-                        }
-                    }
-                }
-            }
-        }
-        // Check that a parameter initializer contains no references to parameters declared to the right of itself
-        function checkParameterInitializer(node) {
-            if (ts.getRootDeclaration(node).kind !== 142 /* Parameter */) {
-                return;
-            }
-            var func = ts.getContainingFunction(node);
-            visit(node.initializer);
-            function visit(n) {
-                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
-                    // do not dive in types
-                    // skip declaration names (i.e. in object literal expressions)
-                    return;
-                }
-                if (n.kind === 172 /* PropertyAccessExpression */) {
-                    // skip property names in property access expression
-                    return visit(n.expression);
-                }
-                else if (n.kind === 69 /* Identifier */) {
-                    // check FunctionLikeDeclaration.locals (stores parameters\function local variable)
-                    // if it contains entry with a specified name
-                    var symbol = resolveName(n, n.text, 107455 /* Value */ | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
-                        return;
-                    }
-                    if (symbol.valueDeclaration === node) {
-                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
-                        return;
-                    }
-                    // locals map for function contain both parameters and function locals
-                    // so we need to do a bit of extra work to check if reference is legal
-                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (enclosingContainer === func) {
-                        if (symbol.valueDeclaration.kind === 142 /* Parameter */) {
-                            // it is ok to reference parameter in initializer if either
-                            // - parameter is located strictly on the left of current parameter declaration
-                            if (symbol.valueDeclaration.pos < node.pos) {
-                                return;
-                            }
-                            // - parameter is wrapped in function-like entity
-                            var current = n;
-                            while (current !== node.initializer) {
-                                if (ts.isFunctionLike(current.parent)) {
-                                    return;
-                                }
-                                // computed property names/initializers in instance property declaration of class like entities
-                                // are executed in constructor and thus deferred
-                                if (current.parent.kind === 145 /* PropertyDeclaration */ &&
-                                    !(current.parent.flags & 32 /* Static */) &&
-                                    ts.isClassLike(current.parent.parent)) {
-                                    return;
-                                }
-                                current = current.parent;
-                            }
-                        }
-                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
-                    }
-                }
-                else {
-                    return ts.forEachChild(n, visit);
-                }
-            }
-        }
-        // Check variable, parameter, or property declaration
-        function checkVariableLikeDeclaration(node) {
-            checkDecorators(node);
-            checkSourceElement(node.type);
-            // For a computed property, just check the initializer and exit
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 140 /* ComputedPropertyName */) {
-                checkComputedPropertyName(node.name);
-                if (node.initializer) {
-                    checkExpressionCached(node.initializer);
-                }
-            }
-            if (node.kind === 169 /* BindingElement */) {
-                // check computed properties inside property names of binding elements
-                if (node.propertyName && node.propertyName.kind === 140 /* ComputedPropertyName */) {
-                    checkComputedPropertyName(node.propertyName);
-                }
-                // check private/protected variable access
-                var parent_11 = node.parent.parent;
-                var parentType = getTypeForBindingElementParent(parent_11);
-                var name_17 = node.propertyName || node.name;
-                var property = getPropertyOfType(parentType, getTextOfPropertyName(name_17));
-                if (parent_11.initializer && property && getParentOfSymbol(property)) {
-                    checkClassPropertyAccess(parent_11, parent_11.initializer, parentType, property);
-                }
-            }
-            // For a binding pattern, check contained binding elements
-            if (ts.isBindingPattern(node.name)) {
-                ts.forEach(node.name.elements, checkSourceElement);
-            }
-            // For a parameter declaration with an initializer, error and exit if the containing function doesn't have a body
-            if (node.initializer && ts.getRootDeclaration(node).kind === 142 /* Parameter */ && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
-                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
-                return;
-            }
-            // For a binding pattern, validate the initializer and exit
-            if (ts.isBindingPattern(node.name)) {
-                // Don't validate for-in initializer as it is already an error
-                if (node.initializer && node.parent.parent.kind !== 207 /* ForInStatement */) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, /*headMessage*/ undefined);
-                    checkParameterInitializer(node);
-                }
-                return;
-            }
-            var symbol = getSymbolOfNode(node);
-            var type = getTypeOfVariableOrParameterOrProperty(symbol);
-            if (node === symbol.valueDeclaration) {
-                // Node is the primary declaration of the symbol, just validate the initializer
-                // Don't validate for-in initializer as it is already an error
-                if (node.initializer && node.parent.parent.kind !== 207 /* ForInStatement */) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, /*headMessage*/ undefined);
-                    checkParameterInitializer(node);
-                }
-            }
-            else {
-                // Node is a secondary declaration, check that type is identical to primary declaration and check that
-                // initializer is consistent with type associated with the node
-                var declarationType = getWidenedTypeForVariableLikeDeclaration(node);
-                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
-                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
-                }
-                if (node.initializer) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
-                }
-                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
-                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
-                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
-                }
-            }
-            if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */) {
-                // We know we don't have a binding pattern or computed name here
-                checkExportsOnMergedDeclarations(node);
-                if (node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) {
-                    checkVarDeclaredNamesNotShadowed(node);
-                }
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-        }
-        function areDeclarationFlagsIdentical(left, right) {
-            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
-                return false;
-            }
-            var interestingFlags = 8 /* Private */ |
-                16 /* Protected */ |
-                256 /* Async */ |
-                128 /* Abstract */ |
-                64 /* Readonly */ |
-                32 /* Static */;
-            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
-        }
-        function checkVariableDeclaration(node) {
-            checkGrammarVariableDeclaration(node);
-            return checkVariableLikeDeclaration(node);
-        }
-        function checkBindingElement(node) {
-            checkGrammarBindingElement(node);
-            return checkVariableLikeDeclaration(node);
-        }
-        function checkVariableStatement(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
-            ts.forEach(node.declarationList.declarations, checkSourceElement);
-        }
-        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
-            // We only disallow modifier on a method declaration if it is a property of object-literal-expression
-            if (node.modifiers && node.parent.kind === 171 /* ObjectLiteralExpression */) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    if (node.modifiers.length > 1) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                }
-                else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                }
-            }
-        }
-        function checkExpressionStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-        }
-        function checkIfStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.thenStatement);
-            if (node.thenStatement.kind === 201 /* EmptyStatement */) {
-                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
-            }
-            checkSourceElement(node.elseStatement);
-        }
-        function checkDoStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkSourceElement(node.statement);
-            checkExpression(node.expression);
-        }
-        function checkWhileStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.statement);
-        }
-        function checkForStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.initializer && node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    checkGrammarVariableDeclarationList(node.initializer);
-                }
-            }
-            if (node.initializer) {
-                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
-                }
-                else {
-                    checkExpression(node.initializer);
-                }
-            }
-            if (node.condition)
-                checkExpression(node.condition);
-            if (node.incrementor)
-                checkExpression(node.incrementor);
-            checkSourceElement(node.statement);
-        }
-        function checkForOfStatement(node) {
-            checkGrammarForInOrForOfStatement(node);
-            // Check the LHS and RHS
-            // If the LHS is a declaration, just check it as a variable declaration, which will in turn check the RHS
-            // via checkRightHandSideOfForOf.
-            // If the LHS is an expression, check the LHS, as a destructuring assignment or as a reference.
-            // Then check that the RHS is assignable to it.
-            if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                checkForInOrForOfVariableDeclaration(node);
-            }
-            else {
-                var varExpr = node.initializer;
-                var iteratedType = checkRightHandSideOfForOf(node.expression);
-                // There may be a destructuring assignment on the left side
-                if (varExpr.kind === 170 /* ArrayLiteralExpression */ || varExpr.kind === 171 /* ObjectLiteralExpression */) {
-                    // iteratedType may be undefined. In this case, we still want to check the structure of
-                    // varExpr, in particular making sure it's a valid LeftHandSideExpression. But we'd like
-                    // to short circuit the type relation checking as much as possible, so we pass the unknownType.
-                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
-                }
-                else {
-                    var leftType = checkExpression(varExpr);
-                    checkReferenceExpression(varExpr, /*invalidReferenceMessage*/ ts.Diagnostics.Invalid_left_hand_side_in_for_of_statement, 
-                    /*constantVariableMessage*/ ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property);
-                    // iteratedType will be undefined if the rightType was missing properties/signatures
-                    // required to get its iteratedType (like [Symbol.iterator] or next). This may be
-                    // because we accessed properties from anyType, or it may have led to an error inside
-                    // getElementTypeOfIterable.
-                    if (iteratedType) {
-                        checkTypeAssignableTo(iteratedType, leftType, varExpr, /*headMessage*/ undefined);
-                    }
-                }
-            }
-            checkSourceElement(node.statement);
-        }
-        function checkForInStatement(node) {
-            // Grammar checking
-            checkGrammarForInOrForOfStatement(node);
-            // TypeScript 1.0 spec  (April 2014): 5.4
-            // In a 'for-in' statement of the form
-            // for (let VarDecl in Expr) Statement
-            //   VarDecl must be a variable declaration without a type annotation that declares a variable of type Any,
-            //   and Expr must be an expression of type Any, an object type, or a type parameter type.
-            if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                var variable = node.initializer.declarations[0];
-                if (variable && ts.isBindingPattern(variable.name)) {
-                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
-                }
-                checkForInOrForOfVariableDeclaration(node);
-            }
-            else {
-                // In a 'for-in' statement of the form
-                // for (Var in Expr) Statement
-                //   Var must be an expression classified as a reference of type Any or the String primitive type,
-                //   and Expr must be an expression of type Any, an object type, or a type parameter type.
-                var varExpr = node.initializer;
-                var leftType = checkExpression(varExpr);
-                if (varExpr.kind === 170 /* ArrayLiteralExpression */ || varExpr.kind === 171 /* ObjectLiteralExpression */) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
-                }
-                else if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 /* StringLike */)) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
-                }
-                else {
-                    // run check only former check succeeded to avoid cascading errors
-                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_in_statement, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property);
-                }
-            }
-            var rightType = checkNonNullExpression(node.expression);
-            // unknownType is returned i.e. if node.expression is identifier whose name cannot be resolved
-            // in this case error about missing name is already reported - do not report extra one
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 /* ObjectType */ | 512 /* TypeParameter */)) {
-                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            checkSourceElement(node.statement);
-        }
-        function checkForInOrForOfVariableDeclaration(iterationStatement) {
-            var variableDeclarationList = iterationStatement.initializer;
-            // checkGrammarForInOrForOfStatement will check that there is exactly one declaration.
-            if (variableDeclarationList.declarations.length >= 1) {
-                var decl = variableDeclarationList.declarations[0];
-                checkVariableDeclaration(decl);
-            }
-        }
-        function checkRightHandSideOfForOf(rhsExpression) {
-            var expressionType = checkNonNullExpression(rhsExpression);
-            return checkIteratedTypeOrElementType(expressionType, rhsExpression, /*allowStringInput*/ true);
-        }
-        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput) {
-            if (isTypeAny(inputType)) {
-                return inputType;
-            }
-            if (languageVersion >= 2 /* ES6 */) {
-                return checkElementTypeOfIterable(inputType, errorNode);
-            }
-            if (allowStringInput) {
-                return checkElementTypeOfArrayOrString(inputType, errorNode);
-            }
-            if (isArrayLikeType(inputType)) {
-                var indexType = getIndexTypeOfType(inputType, 1 /* Number */);
-                if (indexType) {
-                    return indexType;
-                }
-            }
-            if (errorNode) {
-                error(errorNode, ts.Diagnostics.Type_0_is_not_an_array_type, typeToString(inputType));
-            }
-            return unknownType;
-        }
-        /**
-         * When errorNode is undefined, it means we should not report any errors.
-         */
-        function checkElementTypeOfIterable(iterable, errorNode) {
-            var elementType = getElementTypeOfIterable(iterable, errorNode);
-            // Now even though we have extracted the iteratedType, we will have to validate that the type
-            // passed in is actually an Iterable.
-            if (errorNode && elementType) {
-                checkTypeAssignableTo(iterable, createIterableType(elementType), errorNode);
-            }
-            return elementType || anyType;
-        }
-        /**
-         * We want to treat type as an iterable, and get the type it is an iterable of. The iterable
-         * must have the following structure (annotated with the names of the variables below):
-         *
-         * { // iterable
-         *     [Symbol.iterator]: { // iteratorFunction
-         *         (): Iterator<T>
-         *     }
-         * }
-         *
-         * T is the type we are after. At every level that involves analyzing return types
-         * of signatures, we union the return types of all the signatures.
-         *
-         * Another thing to note is that at any step of this process, we could run into a dead end,
-         * meaning either the property is missing, or we run into the anyType. If either of these things
-         * happens, we return undefined to signal that we could not find the iterated type. If a property
-         * is missing, and the previous step did not result in 'any', then we also give an error if the
-         * caller requested it. Then the caller can decide what to do in the case where there is no iterated
-         * type. This is different from returning anyType, because that would signify that we have matched the
-         * whole pattern and that T (above) is 'any'.
-         */
-        function getElementTypeOfIterable(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            var typeAsIterable = type;
-            if (!typeAsIterable.iterableElementType) {
-                // As an optimization, if the type is instantiated directly using the globalIterableType (Iterable<number>),
-                // then just grab its type argument.
-                if ((type.flags & 4096 /* Reference */) && type.target === getGlobalIterableType()) {
-                    typeAsIterable.iterableElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorFunction = getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator"));
-                    if (isTypeAny(iteratorFunction)) {
-                        return undefined;
-                    }
-                    var iteratorFunctionSignatures = iteratorFunction ? getSignaturesOfType(iteratorFunction, 0 /* Call */) : emptyArray;
-                    if (iteratorFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
-                        }
-                        return undefined;
-                    }
-                    typeAsIterable.iterableElementType = getElementTypeOfIterator(getUnionType(ts.map(iteratorFunctionSignatures, getReturnTypeOfSignature)), errorNode);
-                }
-            }
-            return typeAsIterable.iterableElementType;
-        }
-        /**
-         * This function has very similar logic as getElementTypeOfIterable, except that it operates on
-         * Iterators instead of Iterables. Here is the structure:
-         *
-         *  { // iterator
-         *      next: { // iteratorNextFunction
-         *          (): { // iteratorNextResult
-         *              value: T // iteratorNextValue
-         *          }
-         *      }
-         *  }
-         *
-         */
-        function getElementTypeOfIterator(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            var typeAsIterator = type;
-            if (!typeAsIterator.iteratorElementType) {
-                // As an optimization, if the type is instantiated directly using the globalIteratorType (Iterator<number>),
-                // then just grab its type argument.
-                if ((type.flags & 4096 /* Reference */) && type.target === getGlobalIteratorType()) {
-                    typeAsIterator.iteratorElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorNextFunction = getTypeOfPropertyOfType(type, "next");
-                    if (isTypeAny(iteratorNextFunction)) {
-                        return undefined;
-                    }
-                    var iteratorNextFunctionSignatures = iteratorNextFunction ? getSignaturesOfType(iteratorNextFunction, 0 /* Call */) : emptyArray;
-                    if (iteratorNextFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.An_iterator_must_have_a_next_method);
-                        }
-                        return undefined;
-                    }
-                    var iteratorNextResult = getUnionType(ts.map(iteratorNextFunctionSignatures, getReturnTypeOfSignature));
-                    if (isTypeAny(iteratorNextResult)) {
-                        return undefined;
-                    }
-                    var iteratorNextValue = getTypeOfPropertyOfType(iteratorNextResult, "value");
-                    if (!iteratorNextValue) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
-                        }
-                        return undefined;
-                    }
-                    typeAsIterator.iteratorElementType = iteratorNextValue;
-                }
-            }
-            return typeAsIterator.iteratorElementType;
-        }
-        function getElementTypeOfIterableIterator(type) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            // As an optimization, if the type is instantiated directly using the globalIterableIteratorType (IterableIterator<number>),
-            // then just grab its type argument.
-            if ((type.flags & 4096 /* Reference */) && type.target === getGlobalIterableIteratorType()) {
-                return type.typeArguments[0];
-            }
-            return getElementTypeOfIterable(type, /*errorNode*/ undefined) ||
-                getElementTypeOfIterator(type, /*errorNode*/ undefined);
-        }
-        /**
-         * This function does the following steps:
-         *   1. Break up arrayOrStringType (possibly a union) into its string constituents and array constituents.
-         *   2. Take the element types of the array constituents.
-         *   3. Return the union of the element types, and string if there was a string constituent.
-         *
-         * For example:
-         *     string -> string
-         *     number[] -> number
-         *     string[] | number[] -> string | number
-         *     string | number[] -> string | number
-         *     string | string[] | number[] -> string | number
-         *
-         * It also errors if:
-         *   1. Some constituent is neither a string nor an array.
-         *   2. Some constituent is a string and target is less than ES5 (because in ES3 string is not indexable).
-         */
-        function checkElementTypeOfArrayOrString(arrayOrStringType, errorNode) {
-            ts.Debug.assert(languageVersion < 2 /* ES6 */);
-            // After we remove all types that are StringLike, we will know if there was a string constituent
-            // based on whether the remaining type is the same as the initial type.
-            var arrayType = arrayOrStringType;
-            if (arrayOrStringType.flags & 16384 /* Union */) {
-                arrayType = getUnionType(ts.filter(arrayOrStringType.types, function (t) { return !(t.flags & 258 /* StringLike */); }));
-            }
-            else if (arrayOrStringType.flags & 258 /* StringLike */) {
-                arrayType = neverType;
-            }
-            var hasStringConstituent = arrayOrStringType !== arrayType;
-            var reportedError = false;
-            if (hasStringConstituent) {
-                if (languageVersion < 1 /* ES5 */) {
-                    error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
-                    reportedError = true;
-                }
-                // Now that we've removed all the StringLike types, if no constituents remain, then the entire
-                // arrayOrStringType was a string.
-                if (arrayType === neverType) {
-                    return stringType;
-                }
-            }
-            if (!isArrayLikeType(arrayType)) {
-                if (!reportedError) {
-                    // Which error we report depends on whether there was a string constituent. For example,
-                    // if the input type is number | string, we want to say that number is not an array type.
-                    // But if the input was just number, we want to say that number is not an array type
-                    // or a string type.
-                    var diagnostic = hasStringConstituent
-                        ? ts.Diagnostics.Type_0_is_not_an_array_type
-                        : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
-                    error(errorNode, diagnostic, typeToString(arrayType));
-                }
-                return hasStringConstituent ? stringType : unknownType;
-            }
-            var arrayElementType = getIndexTypeOfType(arrayType, 1 /* Number */) || unknownType;
-            if (hasStringConstituent) {
-                // This is just an optimization for the case where arrayOrStringType is string | string[]
-                if (arrayElementType.flags & 258 /* StringLike */) {
-                    return stringType;
-                }
-                return getUnionType([arrayElementType, stringType]);
-            }
-            return arrayElementType;
-        }
-        function checkBreakOrContinueStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
-            // TODO: Check that target label is valid
-        }
-        function isGetAccessorWithAnnotatedSetAccessor(node) {
-            return !!(node.kind === 149 /* GetAccessor */ && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 150 /* SetAccessor */)));
-        }
-        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
-            var unwrappedReturnType = ts.isAsyncFunctionLike(func) ? getPromisedType(returnType) : returnType;
-            return maybeTypeOfKind(unwrappedReturnType, 16 /* Void */ | 1 /* Any */);
-        }
-        function checkReturnStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var functionBlock = ts.getContainingFunction(node);
-                if (!functionBlock) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
-                }
-            }
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var signature = getSignatureFromDeclaration(func);
-                var returnType = getReturnTypeOfSignature(signature);
-                if (strictNullChecks || node.expression || returnType === neverType) {
-                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
-                    if (func.asteriskToken) {
-                        // A generator does not need its return expressions checked against its return type.
-                        // Instead, the yield expressions are checked against the element type.
-                        // TODO: Check return expressions of generators when return type tracking is added
-                        // for generators.
-                        return;
-                    }
-                    if (func.kind === 150 /* SetAccessor */) {
-                        if (node.expression) {
-                            error(node.expression, ts.Diagnostics.Setters_cannot_return_a_value);
-                        }
-                    }
-                    else if (func.kind === 148 /* Constructor */) {
-                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node.expression)) {
-                            error(node.expression, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
-                        }
-                    }
-                    else if (func.type || isGetAccessorWithAnnotatedSetAccessor(func)) {
-                        if (ts.isAsyncFunctionLike(func)) {
-                            var promisedType = getPromisedType(returnType);
-                            var awaitedType = checkAwaitedType(exprType, node.expression || node, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                            if (promisedType) {
-                                // If the function has a return type, but promisedType is
-                                // undefined, an error will be reported in checkAsyncFunctionReturnType
-                                // so we don't need to report one here.
-                                checkTypeAssignableTo(awaitedType, promisedType, node.expression || node);
-                            }
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnType, node.expression || node);
-                        }
-                    }
-                }
-                else if (func.kind !== 148 /* Constructor */ && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
-                    // The function has a return type, but the return statement doesn't have an expression.
-                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
-                }
-            }
-        }
-        function checkWithStatement(node) {
-            // Grammar checking for withStatement
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.flags & 33554432 /* AwaitContext */) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
-                }
-            }
-            checkExpression(node.expression);
-            error(node.expression, ts.Diagnostics.All_symbols_within_a_with_block_will_be_resolved_to_any);
-        }
-        function checkSwitchStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            var firstDefaultClause;
-            var hasDuplicateDefaultClause = false;
-            var expressionType = checkExpression(node.expression);
-            ts.forEach(node.caseBlock.clauses, function (clause) {
-                // Grammar check for duplicate default clauses, skip if we already report duplicate default clause
-                if (clause.kind === 250 /* DefaultClause */ && !hasDuplicateDefaultClause) {
-                    if (firstDefaultClause === undefined) {
-                        firstDefaultClause = clause;
-                    }
-                    else {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
-                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
-                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
-                        hasDuplicateDefaultClause = true;
-                    }
-                }
-                if (produceDiagnostics && clause.kind === 249 /* CaseClause */) {
-                    var caseClause = clause;
-                    // TypeScript 1.0 spec (April 2014): 5.9
-                    // In a 'switch' statement, each 'case' expression must be of a type that is comparable
-                    // to or from the type of the 'switch' expression.
-                    var caseType = checkExpression(caseClause.expression);
-                    if (!isTypeComparableTo(expressionType, caseType)) {
-                        // expressionType is not comparable to caseType, try the reversed check and report errors if it fails
-                        checkTypeComparableTo(caseType, expressionType, caseClause.expression, /*headMessage*/ undefined);
-                    }
-                }
-                ts.forEach(clause.statements, checkSourceElement);
-            });
-        }
-        function checkLabeledStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var current = node.parent;
-                while (current) {
-                    if (ts.isFunctionLike(current)) {
-                        break;
-                    }
-                    if (current.kind === 214 /* LabeledStatement */ && current.label.text === node.label.text) {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
-                        break;
-                    }
-                    current = current.parent;
-                }
-            }
-            // ensure that label is unique
-            checkSourceElement(node.statement);
-        }
-        function checkThrowStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.expression === undefined) {
-                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
-                }
-            }
-            if (node.expression) {
-                checkExpression(node.expression);
-            }
-        }
-        function checkTryStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkBlock(node.tryBlock);
-            var catchClause = node.catchClause;
-            if (catchClause) {
-                // Grammar checking
-                if (catchClause.variableDeclaration) {
-                    if (catchClause.variableDeclaration.name.kind !== 69 /* Identifier */) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.name, ts.Diagnostics.Catch_clause_variable_name_must_be_an_identifier);
-                    }
-                    else if (catchClause.variableDeclaration.type) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
-                    }
-                    else if (catchClause.variableDeclaration.initializer) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
-                    }
-                    else {
-                        var identifierName = catchClause.variableDeclaration.name.text;
-                        var locals = catchClause.block.locals;
-                        if (locals && ts.hasProperty(locals, identifierName)) {
-                            var localSymbol = locals[identifierName];
-                            if (localSymbol && (localSymbol.flags & 2 /* BlockScopedVariable */) !== 0) {
-                                grammarErrorOnNode(localSymbol.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, identifierName);
-                            }
-                        }
-                    }
-                }
-                checkBlock(catchClause.block);
-            }
-            if (node.finallyBlock) {
-                checkBlock(node.finallyBlock);
-            }
-        }
-        function checkIndexConstraints(type) {
-            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1 /* Number */);
-            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0 /* String */);
-            var stringIndexType = getIndexTypeOfType(type, 0 /* String */);
-            var numberIndexType = getIndexTypeOfType(type, 1 /* Number */);
-            if (stringIndexType || numberIndexType) {
-                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
-                    var propType = getTypeOfSymbol(prop);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
-                });
-                if (type.flags & 1024 /* Class */ && ts.isClassLike(type.symbol.valueDeclaration)) {
-                    var classDeclaration = type.symbol.valueDeclaration;
-                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
-                        var member = _a[_i];
-                        // Only process instance properties with computed names here.
-                        // Static properties cannot be in conflict with indexers,
-                        // and properties with literal names were already checked.
-                        if (!(member.flags & 32 /* Static */) && ts.hasDynamicName(member)) {
-                            var propType = getTypeOfSymbol(member.symbol);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
-                        }
-                    }
-                }
-            }
-            var errorNode;
-            if (stringIndexType && numberIndexType) {
-                errorNode = declaredNumberIndexer || declaredStringIndexer;
-                // condition 'errorNode === undefined' may appear if types does not declare nor string neither number indexer
-                if (!errorNode && (type.flags & 2048 /* Interface */)) {
-                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0 /* String */) && getIndexTypeOfType(base, 1 /* Number */); });
-                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
-                }
-            }
-            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
-                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
-            }
-            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
-                if (!indexType) {
-                    return;
-                }
-                // index is numeric and property name is not valid numeric literal
-                if (indexKind === 1 /* Number */ && !isNumericName(prop.valueDeclaration.name)) {
-                    return;
-                }
-                // perform property check if property or indexer is declared in 'type'
-                // this allows to rule out cases when both property and indexer are inherited from the base class
-                var errorNode;
-                if (prop.valueDeclaration.name.kind === 140 /* ComputedPropertyName */ || prop.parent === containingType.symbol) {
-                    errorNode = prop.valueDeclaration;
-                }
-                else if (indexDeclaration) {
-                    errorNode = indexDeclaration;
-                }
-                else if (containingType.flags & 2048 /* Interface */) {
-                    // for interfaces property and indexer might be inherited from different bases
-                    // check if any base class already has both property and indexer.
-                    // check should be performed only if 'type' is the first type that brings property\indexer together
-                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
-                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
-                }
-                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
-                    var errorMessage = indexKind === 0 /* String */
-                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
-                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
-                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
-                }
-            }
-        }
-        function checkTypeNameIsReserved(name, message) {
-            // TS 1.0 spec (April 2014): 3.6.1
-            // The predefined type keywords are reserved and cannot be used as names of user defined types.
-            switch (name.text) {
-                case "any":
-                case "number":
-                case "boolean":
-                case "string":
-                case "symbol":
-                case "void":
-                    error(name, message, name.text);
-            }
-        }
-        /** Check each type parameter and check that type parameters have no duplicate type parameter declarations */
-        function checkTypeParameters(typeParameterDeclarations) {
-            if (typeParameterDeclarations) {
-                for (var i = 0, n = typeParameterDeclarations.length; i < n; i++) {
-                    var node = typeParameterDeclarations[i];
-                    checkTypeParameter(node);
-                    if (produceDiagnostics) {
-                        for (var j = 0; j < i; j++) {
-                            if (typeParameterDeclarations[j].symbol === node.symbol) {
-                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        /** Check that type parameter lists are identical across multiple declarations */
-        function checkTypeParameterListsIdentical(node, symbol) {
-            if (symbol.declarations.length === 1) {
-                return;
-            }
-            var firstDecl;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 221 /* ClassDeclaration */ || declaration.kind === 222 /* InterfaceDeclaration */) {
-                    if (!firstDecl) {
-                        firstDecl = declaration;
-                    }
-                    else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) {
-                        error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text);
-                    }
-                }
-            }
-        }
-        function checkClassExpression(node) {
-            checkClassLikeDeclaration(node);
-            checkNodeDeferred(node);
-            return getTypeOfSymbol(getSymbolOfNode(node));
-        }
-        function checkClassExpressionDeferred(node) {
-            ts.forEach(node.members, checkSourceElement);
-        }
-        function checkClassDeclaration(node) {
-            if (!node.name && !(node.flags & 512 /* Default */)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
-            }
-            checkClassLikeDeclaration(node);
-            ts.forEach(node.members, checkSourceElement);
-        }
-        function checkClassLikeDeclaration(node) {
-            checkGrammarClassDeclarationHeritageClauses(node);
-            checkDecorators(node);
-            if (node.name) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-            checkTypeParameters(node.typeParameters);
-            checkExportsOnMergedDeclarations(node);
-            var symbol = getSymbolOfNode(node);
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var typeWithThis = getTypeWithThisArgument(type);
-            var staticType = getTypeOfSymbol(symbol);
-            checkTypeParameterListsIdentical(node, symbol);
-            checkClassForDuplicateDeclarations(node);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                var baseTypes = getBaseTypes(type);
-                if (baseTypes.length && produceDiagnostics) {
-                    var baseType_1 = baseTypes[0];
-                    var staticBaseType = getBaseConstructorTypeOfClass(type);
-                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
-                    checkSourceElement(baseTypeNode.expression);
-                    if (baseTypeNode.typeArguments) {
-                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
-                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments); _i < _a.length; _i++) {
-                            var constructor = _a[_i];
-                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
-                                break;
-                            }
-                        }
-                    }
-                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
-                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
-                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32 /* Class */)) {
-                        // When the static base type is a "class-like" constructor function (but not actually a class), we verify
-                        // that all instantiated base constructor signatures return the same type. We can simply compare the type
-                        // references (as opposed to checking the structure of the types) because elsewhere we have already checked
-                        // that the base type is a class or interface type (and not, for example, an anonymous object type).
-                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
-                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
-                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
-                        }
-                    }
-                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
-                }
-            }
-            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
-            if (implementedTypeNodes) {
-                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
-                    var typeRefNode = implementedTypeNodes_1[_b];
-                    if (!ts.isSupportedExpressionWithTypeArguments(typeRefNode)) {
-                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
-                    }
-                    checkTypeReferenceNode(typeRefNode);
-                    if (produceDiagnostics) {
-                        var t = getTypeFromTypeNode(typeRefNode);
-                        if (t !== unknownType) {
-                            var declaredType = (t.flags & 4096 /* Reference */) ? t.target : t;
-                            if (declaredType.flags & (1024 /* Class */ | 2048 /* Interface */)) {
-                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
-                            }
-                            else {
-                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
-                            }
-                        }
-                    }
-                }
-            }
-            if (produceDiagnostics) {
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-            }
-        }
-        function checkBaseTypeAccessibility(type, node) {
-            var signatures = getSignaturesOfType(type, 1 /* Construct */);
-            if (signatures.length) {
-                var declaration = signatures[0].declaration;
-                if (declaration && declaration.flags & 8 /* Private */) {
-                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
-                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
-                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, node.expression.text);
-                    }
-                }
-            }
-        }
-        function getTargetSymbol(s) {
-            // if symbol is instantiated its flags are not copied from the 'target'
-            // so we'll need to get back original 'target' symbol to work with correct set of flags
-            return s.flags & 16777216 /* Instantiated */ ? getSymbolLinks(s).target : s;
-        }
-        function getClassLikeDeclarationOfSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
-        }
-        function checkKindsOfPropertyMemberOverrides(type, baseType) {
-            // TypeScript 1.0 spec (April 2014): 8.2.3
-            // A derived class inherits all members from its base class it doesn't override.
-            // Inheritance means that a derived class implicitly contains all non - overridden members of the base class.
-            // Both public and private property members are inherited, but only public property members can be overridden.
-            // A property member in a derived class is said to override a property member in a base class
-            // when the derived class property member has the same name and kind(instance or static)
-            // as the base class property member.
-            // The type of an overriding property member must be assignable(section 3.8.4)
-            // to the type of the overridden property member, or otherwise a compile - time error occurs.
-            // Base class instance member functions can be overridden by derived class instance member functions,
-            // but not by other kinds of members.
-            // Base class instance member variables and accessors can be overridden by
-            // derived class instance member variables and accessors, but not by other kinds of members.
-            // NOTE: assignability is checked in checkClassDeclaration
-            var baseProperties = getPropertiesOfObjectType(baseType);
-            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
-                var baseProperty = baseProperties_1[_i];
-                var base = getTargetSymbol(baseProperty);
-                if (base.flags & 134217728 /* Prototype */) {
-                    continue;
-                }
-                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
-                var baseDeclarationFlags = getDeclarationFlagsFromSymbol(base);
-                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
-                if (derived) {
-                    // In order to resolve whether the inherited method was overridden in the base class or not,
-                    // we compare the Symbols obtained. Since getTargetSymbol returns the symbol on the *uninstantiated*
-                    // type declaration, derived and base resolve to the same symbol even in the case of generic classes.
-                    if (derived === base) {
-                        // derived class inherits base without override/redeclaration
-                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
-                        // It is an error to inherit an abstract member without implementing it or being declared abstract.
-                        // If there is no declaration for the derived class (as in the case of class expressions),
-                        // then the class cannot be declared abstract.
-                        if (baseDeclarationFlags & 128 /* Abstract */ && (!derivedClassDecl || !(derivedClassDecl.flags & 128 /* Abstract */))) {
-                            if (derivedClassDecl.kind === 192 /* ClassExpression */) {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
-                            }
-                            else {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
-                            }
-                        }
-                    }
-                    else {
-                        // derived overrides base.
-                        var derivedDeclarationFlags = getDeclarationFlagsFromSymbol(derived);
-                        if ((baseDeclarationFlags & 8 /* Private */) || (derivedDeclarationFlags & 8 /* Private */)) {
-                            // either base or derived property is private - not override, skip it
-                            continue;
-                        }
-                        if ((baseDeclarationFlags & 32 /* Static */) !== (derivedDeclarationFlags & 32 /* Static */)) {
-                            // value of 'static' is not the same for properties - not override, skip it
-                            continue;
-                        }
-                        if ((base.flags & derived.flags & 8192 /* Method */) || ((base.flags & 98308 /* PropertyOrAccessor */) && (derived.flags & 98308 /* PropertyOrAccessor */))) {
-                            // method is overridden with method or property/accessor is overridden with property/accessor - correct case
-                            continue;
-                        }
-                        var errorMessage = void 0;
-                        if (base.flags & 8192 /* Method */) {
-                            if (derived.flags & 98304 /* Accessor */) {
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
-                            }
-                            else {
-                                ts.Debug.assert((derived.flags & 4 /* Property */) !== 0);
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
-                            }
-                        }
-                        else if (base.flags & 4 /* Property */) {
-                            ts.Debug.assert((derived.flags & 8192 /* Method */) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        else {
-                            ts.Debug.assert((base.flags & 98304 /* Accessor */) !== 0);
-                            ts.Debug.assert((derived.flags & 8192 /* Method */) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        error(derived.valueDeclaration.name, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
-                    }
-                }
-            }
-        }
-        function isAccessor(kind) {
-            return kind === 149 /* GetAccessor */ || kind === 150 /* SetAccessor */;
-        }
-        function areTypeParametersIdentical(list1, list2) {
-            if (!list1 && !list2) {
-                return true;
-            }
-            if (!list1 || !list2 || list1.length !== list2.length) {
-                return false;
-            }
-            // TypeScript 1.0 spec (April 2014):
-            // When a generic interface has multiple declarations,  all declarations must have identical type parameter
-            // lists, i.e. identical type parameter names with identical constraints in identical order.
-            for (var i = 0, len = list1.length; i < len; i++) {
-                var tp1 = list1[i];
-                var tp2 = list2[i];
-                if (tp1.name.text !== tp2.name.text) {
-                    return false;
-                }
-                if (!tp1.constraint && !tp2.constraint) {
-                    continue;
-                }
-                if (!tp1.constraint || !tp2.constraint) {
-                    return false;
-                }
-                if (!isTypeIdenticalTo(getTypeFromTypeNode(tp1.constraint), getTypeFromTypeNode(tp2.constraint))) {
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkInheritedPropertiesAreIdentical(type, typeNode) {
-            var baseTypes = getBaseTypes(type);
-            if (baseTypes.length < 2) {
-                return true;
-            }
-            var seen = {};
-            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen[p.name] = { prop: p, containingType: type }; });
-            var ok = true;
-            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
-                var base = baseTypes_2[_i];
-                var properties = getPropertiesOfObjectType(getTypeWithThisArgument(base, type.thisType));
-                for (var _a = 0, properties_4 = properties; _a < properties_4.length; _a++) {
-                    var prop = properties_4[_a];
-                    if (!ts.hasProperty(seen, prop.name)) {
-                        seen[prop.name] = { prop: prop, containingType: base };
-                    }
-                    else {
-                        var existing = seen[prop.name];
-                        var isInheritedProperty = existing.containingType !== type;
-                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
-                            ok = false;
-                            var typeName1 = typeToString(existing.containingType);
-                            var typeName2 = typeToString(base);
-                            var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
-                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
-                        }
-                    }
-                }
-            }
-            return ok;
-        }
-        function checkInterfaceDeclaration(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
-            checkTypeParameters(node.typeParameters);
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                checkTypeParameterListsIdentical(node, symbol);
-                // Only check this symbol once
-                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */);
-                if (node === firstInterfaceDecl) {
-                    var type = getDeclaredTypeOfSymbol(symbol);
-                    var typeWithThis = getTypeWithThisArgument(type);
-                    // run subsequent checks only if first set succeeded
-                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
-                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
-                            var baseType = _a[_i];
-                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
-                        }
-                        checkIndexConstraints(type);
-                    }
-                }
-                checkObjectTypeForDuplicateDeclarations(node);
-            }
-            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
-                if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
-                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
-                }
-                checkTypeReferenceNode(heritageElement);
-            });
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                checkTypeForDuplicateIndexSignatures(node);
-            }
-        }
-        function checkTypeAliasDeclaration(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
-            checkSourceElement(node.type);
-        }
-        function computeEnumMemberValues(node) {
-            var nodeLinks = getNodeLinks(node);
-            if (!(nodeLinks.flags & 16384 /* EnumValuesComputed */)) {
-                var enumSymbol = getSymbolOfNode(node);
-                var enumType = getDeclaredTypeOfSymbol(enumSymbol);
-                var autoValue = 0; // set to undefined when enum member is non-constant
-                var ambient = ts.isInAmbientContext(node);
-                var enumIsConst = ts.isConst(node);
-                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                    var member = _a[_i];
-                    if (isComputedNonLiteralName(member.name)) {
-                        error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
-                    }
-                    else {
-                        var text = getTextOfPropertyName(member.name);
-                        if (isNumericLiteralName(text)) {
-                            error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
-                        }
-                    }
-                    var previousEnumMemberIsNonConstant = autoValue === undefined;
-                    var initializer = member.initializer;
-                    if (initializer) {
-                        autoValue = computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient);
-                    }
-                    else if (ambient && !enumIsConst) {
-                        // In ambient enum declarations that specify no const modifier, enum member declarations
-                        // that omit a value are considered computed members (as opposed to having auto-incremented values assigned).
-                        autoValue = undefined;
-                    }
-                    else if (previousEnumMemberIsNonConstant) {
-                        // If the member declaration specifies no value, the member is considered a constant enum member.
-                        // If the member is the first member in the enum declaration, it is assigned the value zero.
-                        // Otherwise, it is assigned the value of the immediately preceding member plus one,
-                        // and an error occurs if the immediately preceding member is not a constant enum member
-                        error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
-                    }
-                    if (autoValue !== undefined) {
-                        getNodeLinks(member).enumMemberValue = autoValue;
-                        autoValue++;
-                    }
-                }
-                nodeLinks.flags |= 16384 /* EnumValuesComputed */;
-            }
-            function computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient) {
-                // Controls if error should be reported after evaluation of constant value is completed
-                // Can be false if another more precise error was already reported during evaluation.
-                var reportError = true;
-                var value = evalConstant(initializer);
-                if (reportError) {
-                    if (value === undefined) {
-                        if (enumIsConst) {
-                            error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else if (ambient) {
-                            error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else {
-                            // Only here do we need to check that the initializer is assignable to the enum type.
-                            checkTypeAssignableTo(checkExpression(initializer), enumType, initializer, /*headMessage*/ undefined);
-                        }
-                    }
-                    else if (enumIsConst) {
-                        if (isNaN(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN);
-                        }
-                        else if (!isFinite(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
-                        }
-                    }
-                }
-                return value;
-                function evalConstant(e) {
-                    switch (e.kind) {
-                        case 185 /* PrefixUnaryExpression */:
-                            var value_1 = evalConstant(e.operand);
-                            if (value_1 === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operator) {
-                                case 35 /* PlusToken */: return value_1;
-                                case 36 /* MinusToken */: return -value_1;
-                                case 50 /* TildeToken */: return ~value_1;
-                            }
-                            return undefined;
-                        case 187 /* BinaryExpression */:
-                            var left = evalConstant(e.left);
-                            if (left === undefined) {
-                                return undefined;
-                            }
-                            var right = evalConstant(e.right);
-                            if (right === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operatorToken.kind) {
-                                case 47 /* BarToken */: return left | right;
-                                case 46 /* AmpersandToken */: return left & right;
-                                case 44 /* GreaterThanGreaterThanToken */: return left >> right;
-                                case 45 /* GreaterThanGreaterThanGreaterThanToken */: return left >>> right;
-                                case 43 /* LessThanLessThanToken */: return left << right;
-                                case 48 /* CaretToken */: return left ^ right;
-                                case 37 /* AsteriskToken */: return left * right;
-                                case 39 /* SlashToken */: return left / right;
-                                case 35 /* PlusToken */: return left + right;
-                                case 36 /* MinusToken */: return left - right;
-                                case 40 /* PercentToken */: return left % right;
-                            }
-                            return undefined;
-                        case 8 /* NumericLiteral */:
-                            return +e.text;
-                        case 178 /* ParenthesizedExpression */:
-                            return evalConstant(e.expression);
-                        case 69 /* Identifier */:
-                        case 173 /* ElementAccessExpression */:
-                        case 172 /* PropertyAccessExpression */:
-                            var member = initializer.parent;
-                            var currentType = getTypeOfSymbol(getSymbolOfNode(member.parent));
-                            var enumType_1;
-                            var propertyName = void 0;
-                            if (e.kind === 69 /* Identifier */) {
-                                // unqualified names can refer to member that reside in different declaration of the enum so just doing name resolution won't work.
-                                // instead pick current enum type and later try to fetch member from the type
-                                enumType_1 = currentType;
-                                propertyName = e.text;
-                            }
-                            else {
-                                var expression = void 0;
-                                if (e.kind === 173 /* ElementAccessExpression */) {
-                                    if (e.argumentExpression === undefined ||
-                                        e.argumentExpression.kind !== 9 /* StringLiteral */) {
-                                        return undefined;
-                                    }
-                                    expression = e.expression;
-                                    propertyName = e.argumentExpression.text;
-                                }
-                                else {
-                                    expression = e.expression;
-                                    propertyName = e.name.text;
-                                }
-                                // expression part in ElementAccess\PropertyAccess should be either identifier or dottedName
-                                var current = expression;
-                                while (current) {
-                                    if (current.kind === 69 /* Identifier */) {
-                                        break;
-                                    }
-                                    else if (current.kind === 172 /* PropertyAccessExpression */) {
-                                        current = current.expression;
-                                    }
-                                    else {
-                                        return undefined;
-                                    }
-                                }
-                                enumType_1 = checkExpression(expression);
-                                // allow references to constant members of other enums
-                                if (!(enumType_1.symbol && (enumType_1.symbol.flags & 384 /* Enum */))) {
-                                    return undefined;
-                                }
-                            }
-                            if (propertyName === undefined) {
-                                return undefined;
-                            }
-                            var property = getPropertyOfObjectType(enumType_1, propertyName);
-                            if (!property || !(property.flags & 8 /* EnumMember */)) {
-                                return undefined;
-                            }
-                            var propertyDecl = property.valueDeclaration;
-                            // self references are illegal
-                            if (member === propertyDecl) {
-                                return undefined;
-                            }
-                            // illegal case: forward reference
-                            if (!isBlockScopedNameDeclaredBeforeUse(propertyDecl, member)) {
-                                reportError = false;
-                                error(e, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
-                                return undefined;
-                            }
-                            return getNodeLinks(propertyDecl).enumMemberValue;
-                    }
-                }
-            }
-        }
-        function checkEnumDeclaration(node) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkExportsOnMergedDeclarations(node);
-            computeEnumMemberValues(node);
-            var enumIsConst = ts.isConst(node);
-            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
-                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
-            }
-            // Spec 2014 - Section 9.3:
-            // It isn't possible for one enum declaration to continue the automatic numbering sequence of another,
-            // and when an enum type has multiple declarations, only one declaration is permitted to omit a value
-            // for the first member.
-            //
-            // Only perform this check once per symbol
-            var enumSymbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
-            if (node === firstDeclaration) {
-                if (enumSymbol.declarations.length > 1) {
-                    // check that const is placed\omitted on all enum declarations
-                    ts.forEach(enumSymbol.declarations, function (decl) {
-                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
-                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
-                        }
-                    });
-                }
-                var seenEnumMissingInitialInitializer_1 = false;
-                ts.forEach(enumSymbol.declarations, function (declaration) {
-                    // return true if we hit a violation of the rule, false otherwise
-                    if (declaration.kind !== 224 /* EnumDeclaration */) {
-                        return false;
-                    }
-                    var enumDeclaration = declaration;
-                    if (!enumDeclaration.members.length) {
-                        return false;
-                    }
-                    var firstEnumMember = enumDeclaration.members[0];
-                    if (!firstEnumMember.initializer) {
-                        if (seenEnumMissingInitialInitializer_1) {
-                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
-                        }
-                        else {
-                            seenEnumMissingInitialInitializer_1 = true;
-                        }
-                    }
-                });
-            }
-        }
-        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
-            var declarations = symbol.declarations;
-            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
-                var declaration = declarations_5[_i];
-                if ((declaration.kind === 221 /* ClassDeclaration */ ||
-                    (declaration.kind === 220 /* FunctionDeclaration */ && ts.nodeIsPresent(declaration.body))) &&
-                    !ts.isInAmbientContext(declaration)) {
-                    return declaration;
-                }
-            }
-            return undefined;
-        }
-        function inSameLexicalScope(node1, node2) {
-            var container1 = ts.getEnclosingBlockScopeContainer(node1);
-            var container2 = ts.getEnclosingBlockScopeContainer(node2);
-            if (isGlobalSourceFile(container1)) {
-                return isGlobalSourceFile(container2);
-            }
-            else if (isGlobalSourceFile(container2)) {
-                return false;
-            }
-            else {
-                return container1 === container2;
-            }
-        }
-        function checkModuleDeclaration(node) {
-            if (produceDiagnostics) {
-                // Grammar checking
-                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
-                var inAmbientContext = ts.isInAmbientContext(node);
-                if (isGlobalAugmentation && !inAmbientContext) {
-                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
-                }
-                var isAmbientExternalModule = ts.isAmbientModule(node);
-                var contextErrorMessage = isAmbientExternalModule
-                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
-                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
-                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
-                    // If we hit a module declaration in an illegal context, just bail out to avoid cascading errors.
-                    return;
-                }
-                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
-                    if (!inAmbientContext && node.name.kind === 9 /* StringLiteral */) {
-                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
-                    }
-                }
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                // The following checks only apply on a non-ambient instantiated module declaration.
-                if (symbol.flags & 512 /* ValueModule */
-                    && symbol.declarations.length > 1
-                    && !inAmbientContext
-                    && ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
-                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
-                    if (firstNonAmbientClassOrFunc) {
-                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
-                        }
-                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
-                        }
-                    }
-                    // if the module merges with a class declaration in the same lexical scope,
-                    // we need to track this to ensure the correct emit.
-                    var mergedClass = ts.getDeclarationOfKind(symbol, 221 /* ClassDeclaration */);
-                    if (mergedClass &&
-                        inSameLexicalScope(node, mergedClass)) {
-                        getNodeLinks(node).flags |= 32768 /* LexicalModuleMergesWithClass */;
-                    }
-                }
-                if (isAmbientExternalModule) {
-                    if (ts.isExternalModuleAugmentation(node)) {
-                        // body of the augmentation should be checked for consistency only if augmentation was applied to its target (either global scope or module)
-                        // otherwise we'll be swamped in cascading errors.
-                        // We can detect if augmentation was applied using following rules:
-                        // - augmentation for a global scope is always applied
-                        // - augmentation for some external module is applied if symbol for augmentation is merged (it was combined with target module).
-                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432 /* Merged */);
-                        if (checkBody) {
-                            // body of ambient external module is always a module block
-                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
-                                var statement = _a[_i];
-                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
-                            }
-                        }
-                    }
-                    else if (isGlobalSourceFile(node.parent)) {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
-                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
-                        }
-                    }
-                    else {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else {
-                            // Node is not an augmentation and is not located on the script level.
-                            // This means that this is declaration of ambient module that is located in other module or namespace which is prohibited.
-                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
-                        }
-                    }
-                }
-            }
-            checkSourceElement(node.body);
-        }
-        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
-            switch (node.kind) {
-                case 200 /* VariableStatement */:
-                    // error each individual name in variable statement instead of marking the entire variable statement
-                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
-                        var decl = _a[_i];
-                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
-                    }
-                    break;
-                case 235 /* ExportAssignment */:
-                case 236 /* ExportDeclaration */:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
-                    break;
-                case 229 /* ImportEqualsDeclaration */:
-                case 230 /* ImportDeclaration */:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
-                    break;
-                case 169 /* BindingElement */:
-                case 218 /* VariableDeclaration */:
-                    var name_18 = node.name;
-                    if (ts.isBindingPattern(name_18)) {
-                        for (var _b = 0, _c = name_18.elements; _b < _c.length; _b++) {
-                            var el = _c[_b];
-                            // mark individual names in binding pattern
-                            checkModuleAugmentationElement(el, isGlobalAugmentation);
-                        }
-                        break;
-                    }
-                // fallthrough
-                case 221 /* ClassDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 220 /* FunctionDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                    if (isGlobalAugmentation) {
-                        return;
-                    }
-                    var symbol = getSymbolOfNode(node);
-                    if (symbol) {
-                        // module augmentations cannot introduce new names on the top level scope of the module
-                        // this is done it two steps
-                        // 1. quick check - if symbol for node is not merged - this is local symbol to this augmentation - report error
-                        // 2. main check - report error if value declaration of the parent symbol is module augmentation)
-                        var reportError = !(symbol.flags & 33554432 /* Merged */);
-                        if (!reportError) {
-                            // symbol should not originate in augmentation
-                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
-                        }
-                    }
-                    break;
-            }
-        }
-        function getFirstIdentifier(node) {
-            while (true) {
-                if (node.kind === 139 /* QualifiedName */) {
-                    node = node.left;
-                }
-                else if (node.kind === 172 /* PropertyAccessExpression */) {
-                    node = node.expression;
-                }
-                else {
-                    break;
-                }
-            }
-            ts.Debug.assert(node.kind === 69 /* Identifier */);
-            return node;
-        }
-        function checkExternalImportOrExportDeclaration(node) {
-            var moduleName = ts.getExternalModuleName(node);
-            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9 /* StringLiteral */) {
-                error(moduleName, ts.Diagnostics.String_literal_expected);
-                return false;
-            }
-            var inAmbientExternalModule = node.parent.kind === 226 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
-            if (node.parent.kind !== 256 /* SourceFile */ && !inAmbientExternalModule) {
-                error(moduleName, node.kind === 236 /* ExportDeclaration */ ?
-                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
-                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
-                return false;
-            }
-            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
-                // we have already reported errors on top level imports\exports in external module augmentations in checkModuleDeclaration
-                // no need to do this again.
-                if (!isTopLevelInExternalModuleAugmentation(node)) {
-                    // TypeScript 1.0 spec (April 2013): 12.1.6
-                    // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference
-                    // other external modules only through top - level external module names.
-                    // Relative external module names are not permitted.
-                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkAliasSymbol(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target !== unknownSymbol) {
-                // For external modules symbol represent local symbol for an alias. 
-                // This local symbol will merge any other local declarations (excluding other aliases)
-                // and symbol.flags will contains combined representation for all merged declaration.
-                // Based on symbol.flags we can compute a set of excluded meanings (meaning that resolved alias should not have,
-                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export* 
-                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names). 
-                var excludedMeanings = (symbol.flags & (107455 /* Value */ | 1048576 /* ExportValue */) ? 107455 /* Value */ : 0) |
-                    (symbol.flags & 793056 /* Type */ ? 793056 /* Type */ : 0) |
-                    (symbol.flags & 1536 /* Namespace */ ? 1536 /* Namespace */ : 0);
-                if (target.flags & excludedMeanings) {
-                    var message = node.kind === 238 /* ExportSpecifier */ ?
-                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
-                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
-                    error(node, message, symbolToString(symbol));
-                }
-            }
-        }
-        function checkImportBinding(node) {
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkAliasSymbol(node);
-        }
-        function checkImportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023 /* Modifier */)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
-            }
-            if (checkExternalImportOrExportDeclaration(node)) {
-                var importClause = node.importClause;
-                if (importClause) {
-                    if (importClause.name) {
-                        checkImportBinding(importClause);
-                    }
-                    if (importClause.namedBindings) {
-                        if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                            checkImportBinding(importClause.namedBindings);
-                        }
-                        else {
-                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
-                        }
-                    }
-                }
-            }
-        }
-        function checkImportEqualsDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
-                checkImportBinding(node);
-                if (node.flags & 1 /* Export */) {
-                    markExportAsReferenced(node);
-                }
-                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    var target = resolveAlias(getSymbolOfNode(node));
-                    if (target !== unknownSymbol) {
-                        if (target.flags & 107455 /* Value */) {
-                            // Target is a value symbol, check that it is not hidden by a local declaration with the same name
-                            var moduleName = getFirstIdentifier(node.moduleReference);
-                            if (!(resolveEntityName(moduleName, 107455 /* Value */ | 1536 /* Namespace */).flags & 1536 /* Namespace */)) {
-                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
-                            }
-                        }
-                        if (target.flags & 793056 /* Type */) {
-                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
-                        }
-                    }
-                }
-                else {
-                    if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
-                        // Import equals declaration is deprecated in es6 or above
-                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
-                    }
-                }
-            }
-        }
-        function checkExportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
-                // If we hit an export in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023 /* Modifier */)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
-            }
-            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
-                if (node.exportClause) {
-                    // export { x, y }
-                    // export { x, y } from "foo"
-                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
-                    var inAmbientExternalModule = node.parent.kind === 226 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
-                    if (node.parent.kind !== 256 /* SourceFile */ && !inAmbientExternalModule) {
-                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
-                    }
-                }
-                else {
-                    // export * from "foo"
-                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
-                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
-                    }
-                }
-            }
-        }
-        function checkGrammarModuleElementContext(node, errorMessage) {
-            if (node.parent.kind !== 256 /* SourceFile */ && node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 225 /* ModuleDeclaration */) {
-                return grammarErrorOnFirstToken(node, errorMessage);
-            }
-        }
-        function checkExportSpecifier(node) {
-            checkAliasSymbol(node);
-            if (!node.parent.parent.moduleSpecifier) {
-                var exportedName = node.propertyName || node.name;
-                // find immediate value referenced by exported name (SymbolFlags.Alias is set so we don't chase down aliases)
-                var symbol = resolveName(exportedName, exportedName.text, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */, 
-                /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
-                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
-                }
-                else {
-                    markExportAsReferenced(node);
-                }
-            }
-        }
-        function checkExportAssignment(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
-                // If we hit an export assignment in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            var container = node.parent.kind === 256 /* SourceFile */ ? node.parent : node.parent.parent;
-            if (container.kind === 225 /* ModuleDeclaration */ && !ts.isAmbientModule(container)) {
-                error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
-                return;
-            }
-            // Grammar checking
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023 /* Modifier */)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
-            }
-            if (node.expression.kind === 69 /* Identifier */) {
-                markExportAsReferenced(node);
-            }
-            else {
-                checkExpressionCached(node.expression);
-            }
-            checkExternalModuleExports(container);
-            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
-                if (modulekind === ts.ModuleKind.ES6) {
-                    // export assignment is not supported in es6 modules
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
-                }
-                else if (modulekind === ts.ModuleKind.System) {
-                    // system modules does not support export assignment
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
-                }
-            }
-        }
-        function hasExportedMembers(moduleSymbol) {
-            for (var id in moduleSymbol.exports) {
-                if (id !== "export=") {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function checkExternalModuleExports(node) {
-            var moduleSymbol = getSymbolOfNode(node);
-            var links = getSymbolLinks(moduleSymbol);
-            if (!links.exportsChecked) {
-                var exportEqualsSymbol = moduleSymbol.exports["export="];
-                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
-                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
-                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
-                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
-                    }
-                }
-                // Checks for export * conflicts
-                var exports = getExportsOfModule(moduleSymbol);
-                for (var id in exports) {
-                    if (id === "__export") {
-                        continue;
-                    }
-                    var _a = exports[id], declarations = _a.declarations, flags = _a.flags;
-                    // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries. 
-                    // (TS Exceptions: namespaces, function overloads, enums, and interfaces)
-                    if (flags & (1536 /* Namespace */ | 64 /* Interface */ | 384 /* Enum */)) {
-                        continue;
-                    }
-                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
-                    if (flags & 524288 /* TypeAlias */ && exportedDeclarationsCount <= 2) {
-                        // it is legal to merge type alias with other values
-                        // so count should be either 1 (just type alias) or 2 (type alias + merged value)
-                        continue;
-                    }
-                    if (exportedDeclarationsCount > 1) {
-                        for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
-                            var declaration = declarations_6[_i];
-                            if (isNotOverload(declaration)) {
-                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
-                            }
-                        }
-                    }
-                }
-                links.exportsChecked = true;
-            }
-            function isNotOverload(declaration) {
-                return declaration.kind !== 220 /* FunctionDeclaration */ || !!declaration.body;
-            }
-        }
-        function checkSourceElement(node) {
-            if (!node) {
-                return;
-            }
-            var kind = node.kind;
-            if (cancellationToken) {
-                // Only bother checking on a few construct kinds.  We don't want to be excessively
-                // hitting the cancellation token on every node we check.
-                switch (kind) {
-                    case 225 /* ModuleDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                        cancellationToken.throwIfCancellationRequested();
-                }
-            }
-            switch (kind) {
-                case 141 /* TypeParameter */:
-                    return checkTypeParameter(node);
-                case 142 /* Parameter */:
-                    return checkParameter(node);
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    return checkPropertyDeclaration(node);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                    return checkSignatureDeclaration(node);
-                case 153 /* IndexSignature */:
-                    return checkSignatureDeclaration(node);
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    return checkMethodDeclaration(node);
-                case 148 /* Constructor */:
-                    return checkConstructorDeclaration(node);
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return checkAccessorDeclaration(node);
-                case 155 /* TypeReference */:
-                    return checkTypeReferenceNode(node);
-                case 154 /* TypePredicate */:
-                    return checkTypePredicate(node);
-                case 158 /* TypeQuery */:
-                    return checkTypeQuery(node);
-                case 159 /* TypeLiteral */:
-                    return checkTypeLiteral(node);
-                case 160 /* ArrayType */:
-                    return checkArrayType(node);
-                case 161 /* TupleType */:
-                    return checkTupleType(node);
-                case 162 /* UnionType */:
-                case 163 /* IntersectionType */:
-                    return checkUnionOrIntersectionType(node);
-                case 164 /* ParenthesizedType */:
-                    return checkSourceElement(node.type);
-                case 220 /* FunctionDeclaration */:
-                    return checkFunctionDeclaration(node);
-                case 199 /* Block */:
-                case 226 /* ModuleBlock */:
-                    return checkBlock(node);
-                case 200 /* VariableStatement */:
-                    return checkVariableStatement(node);
-                case 202 /* ExpressionStatement */:
-                    return checkExpressionStatement(node);
-                case 203 /* IfStatement */:
-                    return checkIfStatement(node);
-                case 204 /* DoStatement */:
-                    return checkDoStatement(node);
-                case 205 /* WhileStatement */:
-                    return checkWhileStatement(node);
-                case 206 /* ForStatement */:
-                    return checkForStatement(node);
-                case 207 /* ForInStatement */:
-                    return checkForInStatement(node);
-                case 208 /* ForOfStatement */:
-                    return checkForOfStatement(node);
-                case 209 /* ContinueStatement */:
-                case 210 /* BreakStatement */:
-                    return checkBreakOrContinueStatement(node);
-                case 211 /* ReturnStatement */:
-                    return checkReturnStatement(node);
-                case 212 /* WithStatement */:
-                    return checkWithStatement(node);
-                case 213 /* SwitchStatement */:
-                    return checkSwitchStatement(node);
-                case 214 /* LabeledStatement */:
-                    return checkLabeledStatement(node);
-                case 215 /* ThrowStatement */:
-                    return checkThrowStatement(node);
-                case 216 /* TryStatement */:
-                    return checkTryStatement(node);
-                case 218 /* VariableDeclaration */:
-                    return checkVariableDeclaration(node);
-                case 169 /* BindingElement */:
-                    return checkBindingElement(node);
-                case 221 /* ClassDeclaration */:
-                    return checkClassDeclaration(node);
-                case 222 /* InterfaceDeclaration */:
-                    return checkInterfaceDeclaration(node);
-                case 223 /* TypeAliasDeclaration */:
-                    return checkTypeAliasDeclaration(node);
-                case 224 /* EnumDeclaration */:
-                    return checkEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
-                    return checkModuleDeclaration(node);
-                case 230 /* ImportDeclaration */:
-                    return checkImportDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
-                    return checkImportEqualsDeclaration(node);
-                case 236 /* ExportDeclaration */:
-                    return checkExportDeclaration(node);
-                case 235 /* ExportAssignment */:
-                    return checkExportAssignment(node);
-                case 201 /* EmptyStatement */:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 217 /* DebuggerStatement */:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 239 /* MissingDeclaration */:
-                    return checkMissingDeclaration(node);
-            }
-        }
-        // Function and class expression bodies are checked after all statements in the enclosing body. This is
-        // to ensure constructs like the following are permitted:
-        //     const foo = function () {
-        //        const s = foo();
-        //        return "hello";
-        //     }
-        // Here, performing a full type check of the body of the function expression whilst in the process of
-        // determining the type of foo would cause foo to be given type any because of the recursive reference.
-        // Delaying the type check of the body ensures foo has been assigned a type.
-        function checkNodeDeferred(node) {
-            if (deferredNodes) {
-                deferredNodes.push(node);
-            }
-        }
-        function checkDeferredNodes() {
-            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
-                var node = deferredNodes_1[_i];
-                switch (node.kind) {
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
-                        break;
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        checkAccessorDeferred(node);
-                        break;
-                    case 192 /* ClassExpression */:
-                        checkClassExpressionDeferred(node);
-                        break;
-                }
-            }
-        }
-        function checkSourceFile(node) {
-            var start = new Date().getTime();
-            checkSourceFileWorker(node);
-            ts.checkTime += new Date().getTime() - start;
-        }
-        // Fully type check a source file and collect the relevant diagnostics.
-        function checkSourceFileWorker(node) {
-            var links = getNodeLinks(node);
-            if (!(links.flags & 1 /* TypeChecked */)) {
-                // If skipLibCheck is enabled, skip type checking if file is a declaration file.
-                // If skipDefaultLibCheck is enabled, skip type checking if file contains a
-                // '/// <reference no-default-lib="true"/>' directive.
-                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
-                    return;
-                }
-                // Grammar checking
-                checkGrammarSourceFile(node);
-                potentialThisCollisions.length = 0;
-                deferredNodes = [];
-                ts.forEach(node.statements, checkSourceElement);
-                checkDeferredNodes();
-                deferredNodes = undefined;
-                if (ts.isExternalOrCommonJsModule(node)) {
-                    checkExternalModuleExports(node);
-                }
-                if (potentialThisCollisions.length) {
-                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
-                    potentialThisCollisions.length = 0;
-                }
-                links.flags |= 1 /* TypeChecked */;
-            }
-        }
-        function getDiagnostics(sourceFile, ct) {
-            try {
-                // Record the cancellation token so it can be checked later on during checkSourceElement.
-                // Do this in a finally block so we can ensure that it gets reset back to nothing after
-                // this call is done.
-                cancellationToken = ct;
-                return getDiagnosticsWorker(sourceFile);
-            }
-            finally {
-                cancellationToken = undefined;
-            }
-        }
-        function getDiagnosticsWorker(sourceFile) {
-            throwIfNonDiagnosticsProducing();
-            if (sourceFile) {
-                checkSourceFile(sourceFile);
-                return diagnostics.getDiagnostics(sourceFile.fileName);
-            }
-            ts.forEach(host.getSourceFiles(), checkSourceFile);
-            return diagnostics.getDiagnostics();
-        }
-        function getGlobalDiagnostics() {
-            throwIfNonDiagnosticsProducing();
-            return diagnostics.getGlobalDiagnostics();
-        }
-        function throwIfNonDiagnosticsProducing() {
-            if (!produceDiagnostics) {
-                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
-            }
-        }
-        // Language service support
-        function isInsideWithStatementBody(node) {
-            if (node) {
-                while (node.parent) {
-                    if (node.parent.kind === 212 /* WithStatement */ && node.parent.statement === node) {
-                        return true;
-                    }
-                    node = node.parent;
-                }
-            }
-            return false;
-        }
-        function getSymbolsInScope(location, meaning) {
-            var symbols = {};
-            var memberFlags = 0;
-            if (isInsideWithStatementBody(location)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return [];
-            }
-            populateSymbols();
-            return symbolsToArray(symbols);
-            function populateSymbols() {
-                while (location) {
-                    if (location.locals && !isGlobalSourceFile(location)) {
-                        copySymbols(location.locals, meaning);
-                    }
-                    switch (location.kind) {
-                        case 256 /* SourceFile */:
-                            if (!ts.isExternalOrCommonJsModule(location)) {
-                                break;
-                            }
-                        case 225 /* ModuleDeclaration */:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931 /* ModuleMember */);
-                            break;
-                        case 224 /* EnumDeclaration */:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8 /* EnumMember */);
-                            break;
-                        case 192 /* ClassExpression */:
-                            var className = location.name;
-                            if (className) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                        // fall through; this fall-through is necessary because we would like to handle
-                        // type parameter inside class expression similar to how we handle it in classDeclaration and interface Declaration
-                        case 221 /* ClassDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                            // If we didn't come from static member of class or interface,
-                            // add the type parameters into the symbol table
-                            // (type parameters of classDeclaration/classExpression and interface are in member property of the symbol.
-                            // Note: that the memberFlags come from previous iteration.
-                            if (!(memberFlags & 32 /* Static */)) {
-                                copySymbols(getSymbolOfNode(location).members, meaning & 793056 /* Type */);
-                            }
-                            break;
-                        case 179 /* FunctionExpression */:
-                            var funcName = location.name;
-                            if (funcName) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                            break;
-                    }
-                    if (ts.introducesArgumentsExoticObject(location)) {
-                        copySymbol(argumentsSymbol, meaning);
-                    }
-                    memberFlags = location.flags;
-                    location = location.parent;
-                }
-                copySymbols(globals, meaning);
-            }
-            /**
-             * Copy the given symbol into symbol tables if the symbol has the given meaning
-             * and it doesn't already existed in the symbol table
-             * @param key a key for storing in symbol table; if undefined, use symbol.name
-             * @param symbol the symbol to be added into symbol table
-             * @param meaning meaning of symbol to filter by before adding to symbol table
-             */
-            function copySymbol(symbol, meaning) {
-                if (symbol.flags & meaning) {
-                    var id = symbol.name;
-                    // We will copy all symbol regardless of its reserved name because
-                    // symbolsToArray will check whether the key is a reserved name and
-                    // it will not copy symbol with reserved name to the array
-                    if (!ts.hasProperty(symbols, id)) {
-                        symbols[id] = symbol;
-                    }
-                }
-            }
-            function copySymbols(source, meaning) {
-                if (meaning) {
-                    for (var id in source) {
-                        var symbol = source[id];
-                        copySymbol(symbol, meaning);
-                    }
-                }
-            }
-        }
-        function isTypeDeclarationName(name) {
-            return name.kind === 69 /* Identifier */ &&
-                isTypeDeclaration(name.parent) &&
-                name.parent.name === name;
-        }
-        function isTypeDeclaration(node) {
-            switch (node.kind) {
-                case 141 /* TypeParameter */:
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 224 /* EnumDeclaration */:
-                    return true;
-            }
-        }
-        // True if the given identifier is part of a type reference
-        function isTypeReferenceIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 139 /* QualifiedName */) {
-                node = node.parent;
-            }
-            return node.parent && node.parent.kind === 155 /* TypeReference */;
-        }
-        function isHeritageClauseElementIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 172 /* PropertyAccessExpression */) {
-                node = node.parent;
-            }
-            return node.parent && node.parent.kind === 194 /* ExpressionWithTypeArguments */;
-        }
-        function forEachEnclosingClass(node, callback) {
-            var result;
-            while (true) {
-                node = ts.getContainingClass(node);
-                if (!node)
-                    break;
-                if (result = callback(node))
-                    break;
-            }
-            return result;
-        }
-        function isNodeWithinClass(node, classDeclaration) {
-            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
-        }
-        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
-            while (nodeOnRightSide.parent.kind === 139 /* QualifiedName */) {
-                nodeOnRightSide = nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 229 /* ImportEqualsDeclaration */) {
-                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 235 /* ExportAssignment */) {
-                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
-            }
-            return undefined;
-        }
-        function isInRightSideOfImportOrExportAssignment(node) {
-            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
-        }
-        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
-            if (ts.isDeclarationName(entityName)) {
-                return getSymbolOfNode(entityName.parent);
-            }
-            if (ts.isInJavaScriptFile(entityName) && entityName.parent.kind === 172 /* PropertyAccessExpression */) {
-                var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
-                switch (specialPropertyAssignmentKind) {
-                    case 1 /* ExportsProperty */:
-                    case 3 /* PrototypeProperty */:
-                        return getSymbolOfNode(entityName.parent);
-                    case 4 /* ThisProperty */:
-                    case 2 /* ModuleExports */:
-                        return getSymbolOfNode(entityName.parent.parent);
-                    default:
-                }
-            }
-            if (entityName.parent.kind === 235 /* ExportAssignment */) {
-                return resolveEntityName(entityName, 
-                /*all meanings*/ 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */);
-            }
-            if (entityName.kind !== 172 /* PropertyAccessExpression */) {
-                if (isInRightSideOfImportOrExportAssignment(entityName)) {
-                    // Since we already checked for ExportAssignment, this really could only be an Import
-                    return getSymbolOfPartOfRightHandSideOfImportEquals(entityName);
-                }
-            }
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
-            }
-            if (isHeritageClauseElementIdentifier(entityName)) {
-                var meaning = 0 /* None */;
-                // In an interface or class, we're definitely interested in a type.
-                if (entityName.parent.kind === 194 /* ExpressionWithTypeArguments */) {
-                    meaning = 793056 /* Type */;
-                    // In a class 'extends' clause we are also looking for a value.
-                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                        meaning |= 107455 /* Value */;
-                    }
-                }
-                else {
-                    meaning = 1536 /* Namespace */;
-                }
-                meaning |= 8388608 /* Alias */;
-                return resolveEntityName(entityName, meaning);
-            }
-            else if (ts.isExpression(entityName)) {
-                if (ts.nodeIsMissing(entityName)) {
-                    // Missing entity name.
-                    return undefined;
-                }
-                if (entityName.kind === 69 /* Identifier */) {
-                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
-                        return getIntrinsicTagSymbol(entityName.parent);
-                    }
-                    // Include aliases in the meaning, this ensures that we do not follow aliases to where they point and instead
-                    // return the alias symbol.
-                    var meaning = 107455 /* Value */ | 8388608 /* Alias */;
-                    return resolveEntityName(entityName, meaning);
-                }
-                else if (entityName.kind === 172 /* PropertyAccessExpression */) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkPropertyAccessExpression(entityName);
-                    }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
-                else if (entityName.kind === 139 /* QualifiedName */) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkQualifiedName(entityName);
-                    }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
-            }
-            else if (isTypeReferenceIdentifier(entityName)) {
-                var meaning = entityName.parent.kind === 155 /* TypeReference */ ? 793056 /* Type */ : 1536 /* Namespace */;
-                // Include aliases in the meaning, this ensures that we do not follow aliases to where they point and instead
-                // return the alias symbol.
-                meaning |= 8388608 /* Alias */;
-                return resolveEntityName(entityName, meaning);
-            }
-            else if (entityName.parent.kind === 246 /* JsxAttribute */) {
-                return getJsxAttributePropertySymbol(entityName.parent);
-            }
-            if (entityName.parent.kind === 154 /* TypePredicate */) {
-                return resolveEntityName(entityName, /*meaning*/ 1 /* FunctionScopedVariable */);
-            }
-            // Do we want to return undefined here?
-            return undefined;
-        }
-        function getSymbolAtLocation(node) {
-            if (node.kind === 256 /* SourceFile */) {
-                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
-            }
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return undefined;
-            }
-            if (ts.isDeclarationName(node)) {
-                // This is a declaration, call getSymbolOfNode
-                return getSymbolOfNode(node.parent);
-            }
-            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
-                return getSymbolOfNode(node.parent.parent);
-            }
-            if (node.kind === 69 /* Identifier */) {
-                if (isInRightSideOfImportOrExportAssignment(node)) {
-                    return node.parent.kind === 235 /* ExportAssignment */
-                        ? getSymbolOfEntityNameOrPropertyAccessExpression(node)
-                        : getSymbolOfPartOfRightHandSideOfImportEquals(node);
-                }
-                else if (node.parent.kind === 169 /* BindingElement */ &&
-                    node.parent.parent.kind === 167 /* ObjectBindingPattern */ &&
-                    node === node.parent.propertyName) {
-                    var typeOfPattern = getTypeOfNode(node.parent.parent);
-                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
-                    if (propertyDeclaration) {
-                        return propertyDeclaration;
-                    }
-                }
-            }
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                case 172 /* PropertyAccessExpression */:
-                case 139 /* QualifiedName */:
-                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
-                case 97 /* ThisKeyword */:
-                case 95 /* SuperKeyword */:
-                    var type = ts.isExpression(node) ? checkExpression(node) : getTypeFromTypeNode(node);
-                    return type.symbol;
-                case 165 /* ThisType */:
-                    return getTypeFromTypeNode(node).symbol;
-                case 121 /* ConstructorKeyword */:
-                    // constructor keyword for an overload, should take us to the definition if it exist
-                    var constructorDeclaration = node.parent;
-                    if (constructorDeclaration && constructorDeclaration.kind === 148 /* Constructor */) {
-                        return constructorDeclaration.parent.symbol;
-                    }
-                    return undefined;
-                case 9 /* StringLiteral */:
-                    // External module name in an import declaration
-                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
-                        ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
-                        ((node.parent.kind === 230 /* ImportDeclaration */ || node.parent.kind === 236 /* ExportDeclaration */) &&
-                            node.parent.moduleSpecifier === node)) {
-                        return resolveExternalModuleName(node, node);
-                    }
-                // Fall through
-                case 8 /* NumericLiteral */:
-                    // index access
-                    if (node.parent.kind === 173 /* ElementAccessExpression */ && node.parent.argumentExpression === node) {
-                        var objectType = checkExpression(node.parent.expression);
-                        if (objectType === unknownType)
-                            return undefined;
-                        var apparentType = getApparentType(objectType);
-                        if (apparentType === unknownType)
-                            return undefined;
-                        return getPropertyOfType(apparentType, node.text);
-                    }
-                    break;
-            }
-            return undefined;
-        }
-        function getShorthandAssignmentValueSymbol(location) {
-            // The function returns a value symbol of an identifier in the short-hand property assignment.
-            // This is necessary as an identifier in short-hand property assignment can contains two meaning:
-            // property name and property value.
-            if (location && location.kind === 254 /* ShorthandPropertyAssignment */) {
-                return resolveEntityName(location.name, 107455 /* Value */ | 8388608 /* Alias */);
-            }
-            return undefined;
-        }
-        /** Returns the target of an export specifier without following aliases */
-        function getExportSpecifierLocalTargetSymbol(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */);
-        }
-        function getTypeOfNode(node) {
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return unknownType;
-            }
-            if (ts.isTypeNode(node)) {
-                return getTypeFromTypeNode(node);
-            }
-            if (ts.isExpression(node)) {
-                return getTypeOfExpression(node);
-            }
-            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
-                // A SyntaxKind.ExpressionWithTypeArguments is considered a type node, except when it occurs in the
-                // extends clause of a class. We handle that case here.
-                return getBaseTypes(getDeclaredTypeOfSymbol(getSymbolOfNode(node.parent.parent)))[0];
-            }
-            if (isTypeDeclaration(node)) {
-                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
-                var symbol = getSymbolOfNode(node);
-                return getDeclaredTypeOfSymbol(symbol);
-            }
-            if (isTypeDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getDeclaredTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclaration(node)) {
-                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
-                var symbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getTypeOfSymbol(symbol);
-            }
-            if (ts.isBindingPattern(node)) {
-                return getTypeForVariableLikeDeclaration(node.parent, /*includeOptionality*/ true);
-            }
-            if (isInRightSideOfImportOrExportAssignment(node)) {
-                var symbol = getSymbolAtLocation(node);
-                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
-                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
-            }
-            return unknownType;
-        }
-        // Gets the type of object literal or array literal of destructuring assignment.
-        // { a } from 
-        //     for ( { a } of elems) {
-        //     }
-        // [ a ] from 
-        //     [a] = [ some array ...]
-        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
-            ts.Debug.assert(expr.kind === 171 /* ObjectLiteralExpression */ || expr.kind === 170 /* ArrayLiteralExpression */);
-            // If this is from "for of"
-            //     for ( { a } of elems) {
-            //     }
-            if (expr.parent.kind === 208 /* ForOfStatement */) {
-                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
-            }
-            // If this is from "for" initializer
-            //     for ({a } = elems[0];.....) { }
-            if (expr.parent.kind === 187 /* BinaryExpression */) {
-                var iteratedType = checkExpression(expr.parent.right);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
-            }
-            // If this is from nested object binding pattern
-            //     for ({ skills: { primary, secondary } } = multiRobot, i = 0; i < 1; i++) {
-            if (expr.parent.kind === 253 /* PropertyAssignment */) {
-                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
-                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
-            }
-            // Array literal assignment - array destructuring pattern
-            ts.Debug.assert(expr.parent.kind === 170 /* ArrayLiteralExpression */);
-            //    [{ property1: p1, property2 }] = elems;
-            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
-            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, /*allowStringInput*/ false) || unknownType;
-            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
-        }
-        // Gets the property symbol corresponding to the property in destructuring assignment
-        // 'property1' from 
-        //     for ( { property1: a } of elems) {
-        //     }
-        // 'property1' at location 'a' from: 
-        //     [a] = [ property1, property2 ]
-        function getPropertySymbolOfDestructuringAssignment(location) {
-            // Get the type of the object or array literal and then look for property of given name in the type
-            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
-            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
-        }
-        function getTypeOfExpression(expr) {
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
-                expr = expr.parent;
-            }
-            return checkExpression(expr);
-        }
-        /**
-          * Gets either the static or instance type of a class element, based on
-          * whether the element is declared as "static".
-          */
-        function getParentTypeOfClassElement(node) {
-            var classSymbol = getSymbolOfNode(node.parent);
-            return node.flags & 32 /* Static */
-                ? getTypeOfSymbol(classSymbol)
-                : getDeclaredTypeOfSymbol(classSymbol);
-        }
-        // Return the list of properties of the given type, augmented with properties from Function
-        // if the type has call or construct signatures
-        function getAugmentedPropertiesOfType(type) {
-            type = getApparentType(type);
-            var propsByName = createSymbolTable(getPropertiesOfType(type));
-            if (getSignaturesOfType(type, 0 /* Call */).length || getSignaturesOfType(type, 1 /* Construct */).length) {
-                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
-                    if (!ts.hasProperty(propsByName, p.name)) {
-                        propsByName[p.name] = p;
-                    }
-                });
-            }
-            return getNamedMembers(propsByName);
-        }
-        function getRootSymbols(symbol) {
-            if (symbol.flags & 268435456 /* SyntheticProperty */) {
-                var symbols_3 = [];
-                var name_19 = symbol.name;
-                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
-                    var symbol = getPropertyOfType(t, name_19);
-                    if (symbol) {
-                        symbols_3.push(symbol);
-                    }
-                });
-                return symbols_3;
-            }
-            else if (symbol.flags & 67108864 /* Transient */) {
-                var target = void 0;
-                var next = symbol;
-                while (next = getSymbolLinks(next).target) {
-                    target = next;
-                }
-                if (target) {
-                    return [target];
-                }
-            }
-            return [symbol];
-        }
-        // Emitter support
-        function isArgumentsLocalBinding(node) {
-            return getReferencedValueSymbol(node) === argumentsSymbol;
-        }
-        function moduleExportsSomeValue(moduleReferenceExpression) {
-            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
-            if (!moduleSymbol) {
-                // module not found - be conservative
-                return true;
-            }
-            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
-            // if module has export assignment then 'resolveExternalModuleSymbol' will return resolved symbol for export assignment
-            // otherwise it will return moduleSymbol itself
-            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
-            var symbolLinks = getSymbolLinks(moduleSymbol);
-            if (symbolLinks.exportsSomeValue === undefined) {
-                // for export assignments - check if resolved symbol for RHS is itself a value
-                // otherwise - check if at least one export is value
-                symbolLinks.exportsSomeValue = hasExportAssignment
-                    ? !!(moduleSymbol.flags & 107455 /* Value */)
-                    : ts.forEachValue(getExportsOfModule(moduleSymbol), isValue);
-            }
-            return symbolLinks.exportsSomeValue;
-            function isValue(s) {
-                s = resolveSymbol(s);
-                return s && !!(s.flags & 107455 /* Value */);
-            }
-        }
-        // When resolved as an expression identifier, if the given node references an exported entity, return the declaration
-        // node of the exported entity's container. Otherwise, return undefined.
-        function getReferencedExportContainer(node) {
-            var symbol = getReferencedValueSymbol(node);
-            if (symbol) {
-                if (symbol.flags & 1048576 /* ExportValue */) {
-                    // If we reference an exported entity within the same module declaration, then whether
-                    // we prefix depends on the kind of entity. SymbolFlags.ExportHasLocal encompasses all the
-                    // kinds that we do NOT prefix.
-                    var exportSymbol = getMergedSymbol(symbol.exportSymbol);
-                    if (exportSymbol.flags & 944 /* ExportHasLocal */) {
-                        return undefined;
-                    }
-                    symbol = exportSymbol;
-                }
-                var parentSymbol = getParentOfSymbol(symbol);
-                if (parentSymbol) {
-                    if (parentSymbol.flags & 512 /* ValueModule */ && parentSymbol.valueDeclaration.kind === 256 /* SourceFile */) {
-                        return parentSymbol.valueDeclaration;
-                    }
-                    for (var n = node.parent; n; n = n.parent) {
-                        if ((n.kind === 225 /* ModuleDeclaration */ || n.kind === 224 /* EnumDeclaration */) && getSymbolOfNode(n) === parentSymbol) {
-                            return n;
-                        }
-                    }
-                }
-            }
-        }
-        // When resolved as an expression identifier, if the given node references an import, return the declaration of
-        // that import. Otherwise, return undefined.
-        function getReferencedImportDeclaration(node) {
-            var symbol = getReferencedValueSymbol(node);
-            return symbol && symbol.flags & 8388608 /* Alias */ ? getDeclarationOfAliasSymbol(symbol) : undefined;
-        }
-        function isSymbolOfDeclarationWithCollidingName(symbol) {
-            if (symbol.flags & 418 /* BlockScoped */) {
-                var links = getSymbolLinks(symbol);
-                if (links.isDeclarationWithCollidingName === undefined) {
-                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (ts.isStatementWithLocals(container)) {
-                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
-                        if (!!resolveName(container.parent, symbol.name, 107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined)) {
-                            // redeclaration - always should be renamed
-                            links.isDeclarationWithCollidingName = true;
-                        }
-                        else if (nodeLinks_1.flags & 131072 /* CapturedBlockScopedBinding */) {
-                            // binding is captured in the function
-                            // should be renamed if:
-                            // - binding is not top level - top level bindings never collide with anything
-                            // AND
-                            //   - binding is not declared in loop, should be renamed to avoid name reuse across siblings
-                            //     let a, b
-                            //     { let x = 1; a = () => x;  }
-                            //     { let x = 100; b = () => x; }
-                            //     console.log(a()); // should print '1'
-                            //     console.log(b()); // should print '100'
-                            //     OR
-                            //   - binding is declared inside loop but not in inside initializer of iteration statement or directly inside loop body
-                            //     * variables from initializer are passed to rewritten loop body as parameters so they are not captured directly
-                            //     * variables that are declared immediately in loop body will become top level variable after loop is rewritten and thus
-                            //       they will not collide with anything
-                            var isDeclaredInLoop = nodeLinks_1.flags & 262144 /* BlockScopedBindingInLoop */;
-                            var inLoopInitializer = ts.isIterationStatement(container, /*lookInLabeledStatements*/ false);
-                            var inLoopBodyBlock = container.kind === 199 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false);
-                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
-                        }
-                        else {
-                            links.isDeclarationWithCollidingName = false;
-                        }
-                    }
-                }
-                return links.isDeclarationWithCollidingName;
-            }
-            return false;
-        }
-        // When resolved as an expression identifier, if the given node references a nested block scoped entity with
-        // a name that either hides an existing name or might hide it when compiled downlevel,
-        // return the declaration of that entity. Otherwise, return undefined.
-        function getReferencedDeclarationWithCollidingName(node) {
-            var symbol = getReferencedValueSymbol(node);
-            return symbol && isSymbolOfDeclarationWithCollidingName(symbol) ? symbol.valueDeclaration : undefined;
-        }
-        // Return true if the given node is a declaration of a nested block scoped entity with a name that either hides an
-        // existing name or might hide a name when compiled downlevel
-        function isDeclarationWithCollidingName(node) {
-            return isSymbolOfDeclarationWithCollidingName(getSymbolOfNode(node));
-        }
-        function isValueAliasDeclaration(node) {
-            switch (node.kind) {
-                case 229 /* ImportEqualsDeclaration */:
-                case 231 /* ImportClause */:
-                case 232 /* NamespaceImport */:
-                case 234 /* ImportSpecifier */:
-                case 238 /* ExportSpecifier */:
-                    return isAliasResolvedToValue(getSymbolOfNode(node));
-                case 236 /* ExportDeclaration */:
-                    var exportClause = node.exportClause;
-                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
-                case 235 /* ExportAssignment */:
-                    return node.expression && node.expression.kind === 69 /* Identifier */ ? isAliasResolvedToValue(getSymbolOfNode(node)) : true;
-            }
-            return false;
-        }
-        function isTopLevelValueImportEqualsWithEntityName(node) {
-            if (node.parent.kind !== 256 /* SourceFile */ || !ts.isInternalModuleImportEqualsDeclaration(node)) {
-                // parent is not source file or it is not reference to internal module
-                return false;
-            }
-            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
-            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
-        }
-        function isAliasResolvedToValue(symbol) {
-            var target = resolveAlias(symbol);
-            if (target === unknownSymbol) {
-                return true;
-            }
-            // const enums and modules that contain only const enums are not considered values from the emit perspective
-            // unless 'preserveConstEnums' option is set to true
-            return target.flags & 107455 /* Value */ &&
-                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
-        }
-        function isConstEnumOrConstEnumOnlyModule(s) {
-            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
-        }
-        function isReferencedAliasDeclaration(node, checkChildren) {
-            if (ts.isAliasSymbolDeclaration(node)) {
-                var symbol = getSymbolOfNode(node);
-                if (getSymbolLinks(symbol).referenced) {
-                    return true;
-                }
-            }
-            if (checkChildren) {
-                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
-            }
-            return false;
-        }
-        function isImplementationOfOverload(node) {
-            if (ts.nodeIsPresent(node.body)) {
-                var symbol = getSymbolOfNode(node);
-                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
-                // If this function body corresponds to function with multiple signature, it is implementation of overload
-                // e.g.: function foo(a: string): string;
-                //       function foo(a: number): number;
-                //       function foo(a: any) { // This is implementation of the overloads
-                //           return a;
-                //       }
-                return signaturesOfSymbol.length > 1 ||
-                    // If there is single signature for the symbol, it is overload if that signature isn't coming from the node
-                    // e.g.: function foo(a: string): string;
-                    //       function foo(a: any) { // This is implementation of the overloads
-                    //           return a;
-                    //       }
-                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
-            }
-            return false;
-        }
-        function getNodeCheckFlags(node) {
-            return getNodeLinks(node).flags;
-        }
-        function getEnumMemberValue(node) {
-            computeEnumMemberValues(node.parent);
-            return getNodeLinks(node).enumMemberValue;
-        }
-        function getConstantValue(node) {
-            if (node.kind === 255 /* EnumMember */) {
-                return getEnumMemberValue(node);
-            }
-            var symbol = getNodeLinks(node).resolvedSymbol;
-            if (symbol && (symbol.flags & 8 /* EnumMember */)) {
-                // inline property\index accesses only for const enums
-                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
-                    return getEnumMemberValue(symbol.valueDeclaration);
-                }
-            }
-            return undefined;
-        }
-        function isFunctionType(type) {
-            return type.flags & 80896 /* ObjectType */ && getSignaturesOfType(type, 0 /* Call */).length > 0;
-        }
-        function getTypeReferenceSerializationKind(typeName) {
-            // Resolve the symbol as a value to ensure the type can be reached at runtime during emit.
-            var valueSymbol = resolveEntityName(typeName, 107455 /* Value */, /*ignoreErrors*/ true);
-            var constructorType = valueSymbol ? getTypeOfSymbol(valueSymbol) : undefined;
-            if (constructorType && isConstructorType(constructorType)) {
-                return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
-            }
-            // Resolve the symbol as a type so that we can provide a more useful hint for the type serializer.
-            var typeSymbol = resolveEntityName(typeName, 793056 /* Type */, /*ignoreErrors*/ true);
-            // We might not be able to resolve type symbol so use unknown type in that case (eg error case)
-            if (!typeSymbol) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            var type = getDeclaredTypeOfSymbol(typeSymbol);
-            if (type === unknownType) {
-                return ts.TypeReferenceSerializationKind.Unknown;
-            }
-            else if (type.flags & 1 /* Any */) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            else if (isTypeOfKind(type, 16 /* Void */)) {
-                return ts.TypeReferenceSerializationKind.VoidType;
-            }
-            else if (isTypeOfKind(type, 8 /* Boolean */)) {
-                return ts.TypeReferenceSerializationKind.BooleanType;
-            }
-            else if (isTypeOfKind(type, 132 /* NumberLike */)) {
-                return ts.TypeReferenceSerializationKind.NumberLikeType;
-            }
-            else if (isTypeOfKind(type, 258 /* StringLike */)) {
-                return ts.TypeReferenceSerializationKind.StringLikeType;
-            }
-            else if (isTypeOfKind(type, 8192 /* Tuple */)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
-            }
-            else if (isTypeOfKind(type, 16777216 /* ESSymbol */)) {
-                return ts.TypeReferenceSerializationKind.ESSymbolType;
-            }
-            else if (isFunctionType(type)) {
-                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
-            }
-            else if (isArrayType(type)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
-            }
-            else {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-        }
-        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
-            // Get type of the symbol if this is the valid symbol otherwise get type at location
-            var symbol = getSymbolOfNode(declaration);
-            var type = symbol && !(symbol.flags & (2048 /* TypeLiteral */ | 131072 /* Signature */))
-                ? getTypeOfSymbol(symbol)
-                : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
-            var signature = getSignatureFromDeclaration(signatureDeclaration);
-            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
-        }
-        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
-            var type = getWidenedType(getTypeOfExpression(expr));
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeBaseConstructorTypeOfClass(node, enclosingDeclaration, flags, writer) {
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(node));
-            resolveBaseTypesOfClass(classType);
-            var baseType = classType.resolvedBaseTypes.length ? classType.resolvedBaseTypes[0] : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(baseType, writer, enclosingDeclaration, flags);
-        }
-        function hasGlobalName(name) {
-            return ts.hasProperty(globals, name);
-        }
-        function getReferencedValueSymbol(reference) {
-            return getNodeLinks(reference).resolvedSymbol ||
-                resolveName(reference, reference.text, 107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */, 
-                /*nodeNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-        }
-        function getReferencedValueDeclaration(reference) {
-            ts.Debug.assert(!ts.nodeIsSynthesized(reference));
-            var symbol = getReferencedValueSymbol(reference);
-            return symbol && getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
-        }
-        function createResolver() {
-            // this variable and functions that use it are deliberately moved here from the outer scope
-            // to avoid scope pollution
-            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
-            var fileToDirective;
-            if (resolvedTypeReferenceDirectives) {
-                // populate reverse mapping: file path -> type reference directive that was resolved to this file
-                fileToDirective = ts.createFileMap();
-                for (var key in resolvedTypeReferenceDirectives) {
-                    if (!ts.hasProperty(resolvedTypeReferenceDirectives, key)) {
-                        continue;
-                    }
-                    var resolvedDirective = resolvedTypeReferenceDirectives[key];
-                    if (!resolvedDirective) {
-                        continue;
-                    }
-                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
-                    fileToDirective.set(file.path, key);
-                }
-            }
-            return {
-                getReferencedExportContainer: getReferencedExportContainer,
-                getReferencedImportDeclaration: getReferencedImportDeclaration,
-                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
-                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
-                isValueAliasDeclaration: isValueAliasDeclaration,
-                hasGlobalName: hasGlobalName,
-                isReferencedAliasDeclaration: isReferencedAliasDeclaration,
-                getNodeCheckFlags: getNodeCheckFlags,
-                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
-                isDeclarationVisible: isDeclarationVisible,
-                isImplementationOfOverload: isImplementationOfOverload,
-                writeTypeOfDeclaration: writeTypeOfDeclaration,
-                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
-                writeTypeOfExpression: writeTypeOfExpression,
-                writeBaseConstructorTypeOfClass: writeBaseConstructorTypeOfClass,
-                isSymbolAccessible: isSymbolAccessible,
-                isEntityNameVisible: isEntityNameVisible,
-                getConstantValue: getConstantValue,
-                collectLinkedAliases: collectLinkedAliases,
-                getReferencedValueDeclaration: getReferencedValueDeclaration,
-                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
-                isOptionalParameter: isOptionalParameter,
-                moduleExportsSomeValue: moduleExportsSomeValue,
-                isArgumentsLocalBinding: isArgumentsLocalBinding,
-                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
-                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
-                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol
-            };
-            // defined here to avoid outer scope pollution
-            function getTypeReferenceDirectivesForEntityName(node) {
-                // program does not have any files with type reference directives - bail out
-                if (!fileToDirective) {
-                    return undefined;
-                }
-                // property access can only be used as values
-                // qualified names can only be used as types\namespaces
-                // identifiers are treated as values only if they appear in type queries
-                var meaning = (node.kind === 172 /* PropertyAccessExpression */) || (node.kind === 69 /* Identifier */ && isInTypeQuery(node))
-                    ? 107455 /* Value */ | 1048576 /* ExportValue */
-                    : 793056 /* Type */ | 1536 /* Namespace */;
-                var symbol = resolveEntityName(node, meaning, /*ignoreErrors*/ true);
-                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
-            }
-            // defined here to avoid outer scope pollution
-            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
-                // program does not have any files with type reference directives - bail out
-                if (!fileToDirective) {
-                    return undefined;
-                }
-                if (!isSymbolFromTypeDeclarationFile(symbol)) {
-                    return undefined;
-                }
-                // check what declarations in the symbol can contribute to the target meaning
-                var typeReferenceDirectives;
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    // check meaning of the local symbol to see if declaration needs to be analyzed further
-                    if (decl.symbol && decl.symbol.flags & meaning) {
-                        var file = ts.getSourceFileOfNode(decl);
-                        var typeReferenceDirective = fileToDirective.get(file.path);
-                        if (typeReferenceDirective) {
-                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
-                        }
-                    }
-                }
-                return typeReferenceDirectives;
-            }
-            function isSymbolFromTypeDeclarationFile(symbol) {
-                // bail out if symbol does not have associated declarations (i.e. this is transient symbol created for property in binding pattern)
-                if (!symbol.declarations) {
-                    return false;
-                }
-                // walk the parent chain for symbols to make sure that top level parent symbol is in the global scope
-                // external modules cannot define or contribute to type declaration files
-                var current = symbol;
-                while (true) {
-                    var parent_12 = getParentOfSymbol(current);
-                    if (parent_12) {
-                        current = parent_12;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                if (current.valueDeclaration && current.valueDeclaration.kind === 256 /* SourceFile */ && current.flags & 512 /* ValueModule */) {
-                    return false;
-                }
-                // check that at least one declaration of top level symbol originates from type declaration file
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var file = ts.getSourceFileOfNode(decl);
-                    if (fileToDirective.contains(file.path)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-        }
-        function getExternalModuleFileFromDeclaration(declaration) {
-            var specifier = ts.getExternalModuleName(declaration);
-            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, /*moduleNotFoundError*/ undefined);
-            if (!moduleSymbol) {
-                return undefined;
-            }
-            return ts.getDeclarationOfKind(moduleSymbol, 256 /* SourceFile */);
-        }
-        function initializeTypeChecker() {
-            // Bind all source files and propagate errors
-            ts.forEach(host.getSourceFiles(), function (file) {
-                ts.bindSourceFile(file, compilerOptions);
-            });
-            var augmentations;
-            // Initialize global symbol table
-            ts.forEach(host.getSourceFiles(), function (file) {
-                if (!ts.isExternalOrCommonJsModule(file)) {
-                    mergeSymbolTable(globals, file.locals);
-                }
-                if (file.moduleAugmentations.length) {
-                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
-                }
-                if (file.symbol && file.symbol.globalExports) {
-                    mergeSymbolTable(globals, file.symbol.globalExports);
-                }
-            });
-            if (augmentations) {
-                // merge module augmentations.
-                // this needs to be done after global symbol table is initialized to make sure that all ambient modules are indexed
-                for (var _i = 0, augmentations_1 = augmentations; _i < augmentations_1.length; _i++) {
-                    var list = augmentations_1[_i];
-                    for (var _a = 0, list_2 = list; _a < list_2.length; _a++) {
-                        var augmentation = list_2[_a];
-                        mergeModuleAugmentation(augmentation);
-                    }
-                }
-            }
-            // Setup global builtins
-            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
-            getSymbolLinks(undefinedSymbol).type = undefinedType;
-            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
-            getSymbolLinks(unknownSymbol).type = unknownType;
-            // Initialize special types
-            globalArrayType = getGlobalType("Array", /*arity*/ 1);
-            globalObjectType = getGlobalType("Object");
-            globalFunctionType = getGlobalType("Function");
-            globalStringType = getGlobalType("String");
-            globalNumberType = getGlobalType("Number");
-            globalBooleanType = getGlobalType("Boolean");
-            globalRegExpType = getGlobalType("RegExp");
-            jsxElementType = getExportedTypeFromNamespace("JSX", JsxNames.Element);
-            getGlobalClassDecoratorType = ts.memoize(function () { return getGlobalType("ClassDecorator"); });
-            getGlobalPropertyDecoratorType = ts.memoize(function () { return getGlobalType("PropertyDecorator"); });
-            getGlobalMethodDecoratorType = ts.memoize(function () { return getGlobalType("MethodDecorator"); });
-            getGlobalParameterDecoratorType = ts.memoize(function () { return getGlobalType("ParameterDecorator"); });
-            getGlobalTypedPropertyDescriptorType = ts.memoize(function () { return getGlobalType("TypedPropertyDescriptor", /*arity*/ 1); });
-            getGlobalESSymbolConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Symbol"); });
-            getGlobalPromiseType = ts.memoize(function () { return getGlobalType("Promise", /*arity*/ 1); });
-            tryGetGlobalPromiseType = ts.memoize(function () { return getGlobalSymbol("Promise", 793056 /* Type */, /*diagnostic*/ undefined) && getGlobalPromiseType(); });
-            getGlobalPromiseLikeType = ts.memoize(function () { return getGlobalType("PromiseLike", /*arity*/ 1); });
-            getInstantiatedGlobalPromiseLikeType = ts.memoize(createInstantiatedPromiseLikeType);
-            getGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Promise"); });
-            getGlobalPromiseConstructorLikeType = ts.memoize(function () { return getGlobalType("PromiseConstructorLike"); });
-            getGlobalThenableType = ts.memoize(createThenableType);
-            getGlobalTemplateStringsArrayType = ts.memoize(function () { return getGlobalType("TemplateStringsArray"); });
-            if (languageVersion >= 2 /* ES6 */) {
-                getGlobalESSymbolType = ts.memoize(function () { return getGlobalType("Symbol"); });
-                getGlobalIterableType = ts.memoize(function () { return getGlobalType("Iterable", /*arity*/ 1); });
-                getGlobalIteratorType = ts.memoize(function () { return getGlobalType("Iterator", /*arity*/ 1); });
-                getGlobalIterableIteratorType = ts.memoize(function () { return getGlobalType("IterableIterator", /*arity*/ 1); });
-            }
-            else {
-                getGlobalESSymbolType = ts.memoize(function () { return emptyObjectType; });
-                getGlobalIterableType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIteratorType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIterableIteratorType = ts.memoize(function () { return emptyGenericType; });
-            }
-            anyArrayType = createArrayType(anyType);
-            var symbol = getGlobalSymbol("ReadonlyArray", 793056 /* Type */, /*diagnostic*/ undefined);
-            globalReadonlyArrayType = symbol && getTypeOfGlobalSymbol(symbol, /*arity*/ 1);
-            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
-        }
-        function createInstantiatedPromiseLikeType() {
-            var promiseLikeType = getGlobalPromiseLikeType();
-            if (promiseLikeType !== emptyGenericType) {
-                return createTypeReference(promiseLikeType, [anyType]);
-            }
-            return emptyObjectType;
-        }
-        function createThenableType() {
-            // build the thenable type that is used to verify against a non-promise "thenable" operand to `await`.
-            var thenPropertySymbol = createSymbol(67108864 /* Transient */ | 4 /* Property */, "then");
-            getSymbolLinks(thenPropertySymbol).type = globalFunctionType;
-            var thenableType = createObjectType(65536 /* Anonymous */);
-            thenableType.properties = [thenPropertySymbol];
-            thenableType.members = createSymbolTable(thenableType.properties);
-            thenableType.callSignatures = [];
-            thenableType.constructSignatures = [];
-            return thenableType;
-        }
-        // GRAMMAR CHECKING
-        function checkGrammarDecorators(node) {
-            if (!node.decorators) {
-                return false;
-            }
-            if (!ts.nodeCanBeDecorated(node)) {
-                if (node.kind === 147 /* MethodDeclaration */ && !ts.nodeIsPresent(node.body)) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
-                }
-                else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
-                }
-            }
-            else if (node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */) {
-                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
-                }
-            }
-            return false;
-        }
-        function checkGrammarModifiers(node) {
-            switch (node.kind) {
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 148 /* Constructor */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 153 /* IndexSignature */:
-                case 225 /* ModuleDeclaration */:
-                case 230 /* ImportDeclaration */:
-                case 229 /* ImportEqualsDeclaration */:
-                case 236 /* ExportDeclaration */:
-                case 235 /* ExportAssignment */:
-                case 142 /* Parameter */:
-                    break;
-                case 220 /* FunctionDeclaration */:
-                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 118 /* AsyncKeyword */) &&
-                        node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 256 /* SourceFile */) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 200 /* VariableStatement */:
-                case 223 /* TypeAliasDeclaration */:
-                    if (node.modifiers && node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 256 /* SourceFile */) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                case 224 /* EnumDeclaration */:
-                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 74 /* ConstKeyword */) &&
-                        node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 256 /* SourceFile */) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                default:
-                    return false;
-            }
-            if (!node.modifiers) {
-                return;
-            }
-            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
-            var flags = 0;
-            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
-                var modifier = _a[_i];
-                if (modifier.kind !== 128 /* ReadonlyKeyword */) {
-                    if (node.kind === 144 /* PropertySignature */ || node.kind === 146 /* MethodSignature */) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
-                    }
-                    if (node.kind === 153 /* IndexSignature */) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
-                    }
-                }
-                switch (modifier.kind) {
-                    case 74 /* ConstKeyword */:
-                        if (node.kind !== 224 /* EnumDeclaration */ && node.parent.kind === 221 /* ClassDeclaration */) {
-                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(74 /* ConstKeyword */));
-                        }
-                        break;
-                    case 112 /* PublicKeyword */:
-                    case 111 /* ProtectedKeyword */:
-                    case 110 /* PrivateKeyword */:
-                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
-                        if (modifier.kind === 111 /* ProtectedKeyword */) {
-                            lastProtected = modifier;
-                        }
-                        else if (modifier.kind === 110 /* PrivateKeyword */) {
-                            lastPrivate = modifier;
-                        }
-                        if (flags & 28 /* AccessibilityModifier */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
-                        }
-                        else if (flags & 32 /* Static */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
-                        }
-                        else if (flags & 64 /* Readonly */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
-                        }
-                        else if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
-                        }
-                        else if (flags & 128 /* Abstract */) {
-                            if (modifier.kind === 110 /* PrivateKeyword */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
-                            }
-                            else {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
-                            }
-                        }
-                        flags |= ts.modifierToFlag(modifier.kind);
-                        break;
-                    case 113 /* StaticKeyword */:
-                        if (flags & 32 /* Static */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
-                        }
-                        else if (flags & 64 /* Readonly */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
-                        }
-                        else if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
-                        }
-                        else if (flags & 128 /* Abstract */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                        }
-                        flags |= 32 /* Static */;
-                        lastStatic = modifier;
-                        break;
-                    case 128 /* ReadonlyKeyword */:
-                        if (flags & 64 /* Readonly */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
-                        }
-                        else if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */ && node.kind !== 153 /* IndexSignature */ && node.kind !== 142 /* Parameter */) {
-                            // If node.kind === SyntaxKind.Parameter, checkParameter report an error if it's not a parameter property.
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
-                        }
-                        flags |= 64 /* Readonly */;
-                        lastReadonly = modifier;
-                        break;
-                    case 82 /* ExportKeyword */:
-                        if (flags & 1 /* Export */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
-                        }
-                        else if (flags & 2 /* Ambient */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
-                        }
-                        else if (flags & 128 /* Abstract */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
-                        }
-                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
-                        }
-                        flags |= 1 /* Export */;
-                        break;
-                    case 122 /* DeclareKeyword */:
-                        if (flags & 2 /* Ambient */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
-                        }
-                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 226 /* ModuleBlock */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
-                        }
-                        flags |= 2 /* Ambient */;
-                        lastDeclare = modifier;
-                        break;
-                    case 115 /* AbstractKeyword */:
-                        if (flags & 128 /* Abstract */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
-                        }
-                        if (node.kind !== 221 /* ClassDeclaration */) {
-                            if (node.kind !== 147 /* MethodDeclaration */ &&
-                                node.kind !== 145 /* PropertyDeclaration */ &&
-                                node.kind !== 149 /* GetAccessor */ &&
-                                node.kind !== 150 /* SetAccessor */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
-                            }
-                            if (!(node.parent.kind === 221 /* ClassDeclaration */ && node.parent.flags & 128 /* Abstract */)) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
-                            }
-                            if (flags & 32 /* Static */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                            }
-                            if (flags & 8 /* Private */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
-                            }
-                        }
-                        flags |= 128 /* Abstract */;
-                        break;
-                    case 118 /* AsyncKeyword */:
-                        if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
-                        }
-                        else if (flags & 2 /* Ambient */ || ts.isInAmbientContext(node.parent)) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
-                        }
-                        flags |= 256 /* Async */;
-                        lastAsync = modifier;
-                        break;
-                }
-            }
-            if (node.kind === 148 /* Constructor */) {
-                if (flags & 32 /* Static */) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
-                }
-                if (flags & 128 /* Abstract */) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
-                }
-                else if (flags & 256 /* Async */) {
-                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
-                }
-                else if (flags & 64 /* Readonly */) {
-                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
-                }
-                return;
-            }
-            else if ((node.kind === 230 /* ImportDeclaration */ || node.kind === 229 /* ImportEqualsDeclaration */) && flags & 2 /* Ambient */) {
-                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
-            }
-            else if (node.kind === 142 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && ts.isBindingPattern(node.name)) {
-                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_a_binding_pattern);
-            }
-            if (flags & 256 /* Async */) {
-                return checkGrammarAsyncModifier(node, lastAsync);
-            }
-        }
-        function checkGrammarAsyncModifier(node, asyncModifier) {
-            if (languageVersion < 2 /* ES6 */) {
-                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
-            }
-            switch (node.kind) {
-                case 147 /* MethodDeclaration */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    if (!node.asteriskToken) {
-                        return false;
-                    }
-                    break;
-            }
-            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
-        }
-        function checkGrammarForDisallowedTrailingComma(list) {
-            if (list && list.hasTrailingComma) {
-                var start = list.end - ",".length;
-                var end = list.end;
-                var sourceFile = ts.getSourceFileOfNode(list[0]);
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
-            }
-        }
-        function checkGrammarTypeParameterList(node, typeParameters, file) {
-            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
-                return true;
-            }
-            if (typeParameters && typeParameters.length === 0) {
-                var start = typeParameters.pos - "<".length;
-                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
-                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
-            }
-        }
-        function checkGrammarParameterList(parameters) {
-            if (checkGrammarForDisallowedTrailingComma(parameters)) {
-                return true;
-            }
-            var seenOptionalParameter = false;
-            var parameterCount = parameters.length;
-            for (var i = 0; i < parameterCount; i++) {
-                var parameter = parameters[i];
-                if (parameter.dotDotDotToken) {
-                    if (i !== (parameterCount - 1)) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
-                    }
-                    if (ts.isBindingPattern(parameter.name)) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
-                    }
-                    if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
-                    }
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
-                    }
-                }
-                else if (parameter.questionToken) {
-                    seenOptionalParameter = true;
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
-                    }
-                }
-                else if (seenOptionalParameter && !parameter.initializer) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
-                }
-            }
-        }
-        function checkGrammarFunctionLikeDeclaration(node) {
-            // Prevent cascading error by short-circuit
-            var file = ts.getSourceFileOfNode(node);
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node, node.typeParameters, file) ||
-                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
-        }
-        function checkGrammarArrowFunction(node, file) {
-            if (node.kind === 180 /* ArrowFunction */) {
-                var arrowFunction = node;
-                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
-                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
-                if (startLine !== endLine) {
-                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
-                }
-            }
-            return false;
-        }
-        function checkGrammarIndexSignatureParameters(node) {
-            var parameter = node.parameters[0];
-            if (node.parameters.length !== 1) {
-                if (parameter) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
-                }
-                else {
-                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
-                }
-            }
-            if (parameter.dotDotDotToken) {
-                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
-            }
-            if (parameter.flags & 1023 /* Modifier */) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
-            }
-            if (parameter.questionToken) {
-                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
-            }
-            if (parameter.initializer) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
-            }
-            if (!parameter.type) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
-            }
-            if (parameter.type.kind !== 132 /* StringKeyword */ && parameter.type.kind !== 130 /* NumberKeyword */) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
-            }
-            if (!node.type) {
-                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
-            }
-        }
-        function checkGrammarIndexSignature(node) {
-            // Prevent cascading error by short-circuit
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
-        }
-        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
-            if (typeArguments && typeArguments.length === 0) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                var start = typeArguments.pos - "<".length;
-                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
-            }
-        }
-        function checkGrammarTypeArguments(node, typeArguments) {
-            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
-                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
-        }
-        function checkGrammarForOmittedArgument(node, args) {
-            if (args) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                for (var _i = 0, args_1 = args; _i < args_1.length; _i++) {
-                    var arg = args_1[_i];
-                    if (arg.kind === 193 /* OmittedExpression */) {
-                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
-                    }
-                }
-            }
-        }
-        function checkGrammarArguments(node, args) {
-            return checkGrammarForDisallowedTrailingComma(args) ||
-                checkGrammarForOmittedArgument(node, args);
-        }
-        function checkGrammarHeritageClause(node) {
-            var types = node.types;
-            if (checkGrammarForDisallowedTrailingComma(types)) {
-                return true;
-            }
-            if (types && types.length === 0) {
-                var listType = ts.tokenToString(node.token);
-                var sourceFile = ts.getSourceFileOfNode(node);
-                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
-            }
-        }
-        function checkGrammarClassDeclarationHeritageClauses(node) {
-            var seenExtendsClause = false;
-            var seenImplementsClause = false;
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83 /* ExtendsKeyword */) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
-                        }
-                        if (heritageClause.types.length > 1) {
-                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
-                        }
-                        seenExtendsClause = true;
-                    }
-                    else {
-                        ts.Debug.assert(heritageClause.token === 106 /* ImplementsKeyword */);
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
-                        }
-                        seenImplementsClause = true;
-                    }
-                    // Grammar checking heritageClause inside class declaration
-                    checkGrammarHeritageClause(heritageClause);
-                }
-            }
-        }
-        function checkGrammarInterfaceDeclaration(node) {
-            var seenExtendsClause = false;
-            if (node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83 /* ExtendsKeyword */) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        seenExtendsClause = true;
-                    }
-                    else {
-                        ts.Debug.assert(heritageClause.token === 106 /* ImplementsKeyword */);
-                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
-                    }
-                    // Grammar checking heritageClause inside class declaration
-                    checkGrammarHeritageClause(heritageClause);
-                }
-            }
-            return false;
-        }
-        function checkGrammarComputedPropertyName(node) {
-            // If node is not a computedPropertyName, just skip the grammar checking
-            if (node.kind !== 140 /* ComputedPropertyName */) {
-                return false;
-            }
-            var computedPropertyName = node;
-            if (computedPropertyName.expression.kind === 187 /* BinaryExpression */ && computedPropertyName.expression.operatorToken.kind === 24 /* CommaToken */) {
-                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
-            }
-        }
-        function checkGrammarForGenerator(node) {
-            if (node.asteriskToken) {
-                ts.Debug.assert(node.kind === 220 /* FunctionDeclaration */ ||
-                    node.kind === 179 /* FunctionExpression */ ||
-                    node.kind === 147 /* MethodDeclaration */);
-                if (ts.isInAmbientContext(node)) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
-                }
-                if (!node.body) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
-                }
-                if (languageVersion < 2 /* ES6 */) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
-                }
-            }
-        }
-        function checkGrammarForInvalidQuestionMark(node, questionToken, message) {
-            if (questionToken) {
-                return grammarErrorOnNode(questionToken, message);
-            }
-        }
-        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
-            var seen = {};
-            var Property = 1;
-            var GetAccessor = 2;
-            var SetAccessor = 4;
-            var GetOrSetAccessor = GetAccessor | SetAccessor;
-            var _loop_1 = function(prop) {
-                var name_20 = prop.name;
-                if (prop.kind === 193 /* OmittedExpression */ ||
-                    name_20.kind === 140 /* ComputedPropertyName */) {
-                    // If the name is not a ComputedPropertyName, the grammar checking will skip it
-                    checkGrammarComputedPropertyName(name_20);
-                }
-                if (prop.kind === 254 /* ShorthandPropertyAssignment */ && !inDestructuring && prop.objectAssignmentInitializer) {
-                    // having objectAssignmentInitializer is only valid in ObjectAssignmentPattern
-                    // outside of destructuring it is a syntax error
-                    return { value: grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment) };
-                }
-                // Modifiers are never allowed on properties except for 'async' on a method declaration
-                ts.forEach(prop.modifiers, function (mod) {
-                    if (mod.kind !== 118 /* AsyncKeyword */ || prop.kind !== 147 /* MethodDeclaration */) {
-                        grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
-                    }
-                });
-                // ECMA-262 11.1.5 Object Initializer
-                // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
-                // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
-                // IsDataDescriptor(propId.descriptor) is true.
-                //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
-                //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
-                //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
-                // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
-                var currentKind = void 0;
-                if (prop.kind === 253 /* PropertyAssignment */ || prop.kind === 254 /* ShorthandPropertyAssignment */) {
-                    // Grammar checking for computedPropertyName and shorthandPropertyAssignment
-                    checkGrammarForInvalidQuestionMark(prop, prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
-                    if (name_20.kind === 8 /* NumericLiteral */) {
-                        checkGrammarNumericLiteral(name_20);
-                    }
-                    currentKind = Property;
-                }
-                else if (prop.kind === 147 /* MethodDeclaration */) {
-                    currentKind = Property;
-                }
-                else if (prop.kind === 149 /* GetAccessor */) {
-                    currentKind = GetAccessor;
-                }
-                else if (prop.kind === 150 /* SetAccessor */) {
-                    currentKind = SetAccessor;
-                }
-                else {
-                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
-                }
-                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_20);
-                if (effectiveName === undefined) {
-                    return "continue";
-                }
-                if (!ts.hasProperty(seen, effectiveName)) {
-                    seen[effectiveName] = currentKind;
-                }
-                else {
-                    var existingKind = seen[effectiveName];
-                    if (currentKind === Property && existingKind === Property) {
-                        grammarErrorOnNode(name_20, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_20));
-                    }
-                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
-                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[effectiveName] = currentKind | existingKind;
-                        }
-                        else {
-                            return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
-                        }
-                    }
-                    else {
-                        return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name) };
-                    }
-                }
-            };
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var prop = _a[_i];
-                var state_2 = _loop_1(prop);
-                if (typeof state_2 === "object") return state_2.value;
-            }
-        }
-        function checkGrammarJsxElement(node) {
-            var seen = {};
-            for (var _i = 0, _a = node.attributes; _i < _a.length; _i++) {
-                var attr = _a[_i];
-                if (attr.kind === 247 /* JsxSpreadAttribute */) {
-                    continue;
-                }
-                var jsxAttr = attr;
-                var name_21 = jsxAttr.name;
-                if (!ts.hasProperty(seen, name_21.text)) {
-                    seen[name_21.text] = true;
-                }
-                else {
-                    return grammarErrorOnNode(name_21, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
-                }
-                var initializer = jsxAttr.initializer;
-                if (initializer && initializer.kind === 248 /* JsxExpression */ && !initializer.expression) {
-                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
-                }
-            }
-        }
-        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
-            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
-                return true;
-            }
-            if (forInOrOfStatement.initializer.kind === 219 /* VariableDeclarationList */) {
-                var variableList = forInOrOfStatement.initializer;
-                if (!checkGrammarVariableDeclarationList(variableList)) {
-                    var declarations = variableList.declarations;
-                    // declarations.length can be zero if there is an error in variable declaration in for-of or for-in
-                    // See http://www.ecma-international.org/ecma-262/6.0/#sec-for-in-and-for-of-statements for details
-                    // For example:
-                    //      var let = 10;
-                    //      for (let of [1,2,3]) {} // this is invalid ES6 syntax
-                    //      for (let in [1,2,3]) {} // this is invalid ES6 syntax
-                    // We will then want to skip on grammar checking on variableList declaration
-                    if (!declarations.length) {
-                        return false;
-                    }
-                    if (declarations.length > 1) {
-                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
-                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
-                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
-                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
-                    }
-                    var firstDeclaration = declarations[0];
-                    if (firstDeclaration.initializer) {
-                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
-                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
-                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
-                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
-                    }
-                    if (firstDeclaration.type) {
-                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
-                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
-                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
-                        return grammarErrorOnNode(firstDeclaration, diagnostic);
-                    }
-                }
-            }
-            return false;
-        }
-        function checkGrammarAccessor(accessor) {
-            var kind = accessor.kind;
-            if (languageVersion < 1 /* ES5 */) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
-            }
-            else if (ts.isInAmbientContext(accessor)) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
-            }
-            else if (accessor.body === undefined && !(accessor.flags & 128 /* Abstract */)) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
-            }
-            else if (accessor.typeParameters) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
-            }
-            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
-                return grammarErrorOnNode(accessor.name, kind === 149 /* GetAccessor */ ?
-                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
-                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
-            }
-            else if (kind === 150 /* SetAccessor */) {
-                if (accessor.type) {
-                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
-                }
-                else {
-                    var parameter = accessor.parameters[0];
-                    if (parameter.dotDotDotToken) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
-                    }
-                    else if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
-                    }
-                    else if (parameter.initializer) {
-                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
-                    }
-                }
-            }
-        }
-        /** Does the accessor have the right number of parameters?
-
-            A get accessor has no parameters or a single `this` parameter.
-            A set accessor has one parameter or a `this` parameter and one more parameter */
-        function doesAccessorHaveCorrectParameterCount(accessor) {
-            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 149 /* GetAccessor */ ? 0 : 1);
-        }
-        function getAccessorThisParameter(accessor) {
-            if (accessor.parameters.length === (accessor.kind === 149 /* GetAccessor */ ? 1 : 2) &&
-                accessor.parameters[0].name.kind === 69 /* Identifier */ &&
-                accessor.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */) {
-                return accessor.parameters[0];
-            }
-        }
-        function checkGrammarForNonSymbolComputedProperty(node, message) {
-            if (ts.isDynamicName(node)) {
-                return grammarErrorOnNode(node, message);
-            }
-        }
-        function checkGrammarMethod(node) {
-            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
-                checkGrammarFunctionLikeDeclaration(node) ||
-                checkGrammarForGenerator(node)) {
-                return true;
-            }
-            if (node.parent.kind === 171 /* ObjectLiteralExpression */) {
-                if (checkGrammarForInvalidQuestionMark(node, node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
-                    return true;
-                }
-                else if (node.body === undefined) {
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
-                }
-            }
-            if (ts.isClassLike(node.parent)) {
-                // Technically, computed properties in ambient contexts is disallowed
-                // for property declarations and accessors too, not just methods.
-                // However, property declarations disallow computed names in general,
-                // and accessors are not allowed in ambient contexts in general,
-                // so this error only really matters for methods.
-                if (ts.isInAmbientContext(node)) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
-                }
-                else if (!node.body) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
-                }
-            }
-            else if (node.parent.kind === 222 /* InterfaceDeclaration */) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
-            }
-            else if (node.parent.kind === 159 /* TypeLiteral */) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
-            }
-        }
-        function checkGrammarBreakOrContinueStatement(node) {
-            var current = node;
-            while (current) {
-                if (ts.isFunctionLike(current)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
-                }
-                switch (current.kind) {
-                    case 214 /* LabeledStatement */:
-                        if (node.label && current.label.text === node.label.text) {
-                            // found matching label - verify that label usage is correct
-                            // continue can only target labels that are on iteration statements
-                            var isMisplacedContinueLabel = node.kind === 209 /* ContinueStatement */
-                                && !ts.isIterationStatement(current.statement, /*lookInLabeledStatement*/ true);
-                            if (isMisplacedContinueLabel) {
-                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
-                            }
-                            return false;
-                        }
-                        break;
-                    case 213 /* SwitchStatement */:
-                        if (node.kind === 210 /* BreakStatement */ && !node.label) {
-                            // unlabeled break within switch statement - ok
-                            return false;
-                        }
-                        break;
-                    default:
-                        if (ts.isIterationStatement(current, /*lookInLabeledStatement*/ false) && !node.label) {
-                            // unlabeled break or continue within iteration statement - ok
-                            return false;
-                        }
-                        break;
-                }
-                current = current.parent;
-            }
-            if (node.label) {
-                var message = node.kind === 210 /* BreakStatement */
-                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-            else {
-                var message = node.kind === 210 /* BreakStatement */
-                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-        }
-        function checkGrammarBindingElement(node) {
-            if (node.dotDotDotToken) {
-                var elements = node.parent.elements;
-                if (node !== ts.lastOrUndefined(elements)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
-                }
-                if (node.name.kind === 168 /* ArrayBindingPattern */ || node.name.kind === 167 /* ObjectBindingPattern */) {
-                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
-                }
-                if (node.initializer) {
-                    // Error on equals token which immediate precedes the initializer
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
-                }
-            }
-        }
-        function checkGrammarVariableDeclaration(node) {
-            if (node.parent.parent.kind !== 207 /* ForInStatement */ && node.parent.parent.kind !== 208 /* ForOfStatement */) {
-                if (ts.isInAmbientContext(node)) {
-                    if (node.initializer) {
-                        // Error on equals token which immediate precedes the initializer
-                        var equalsTokenLength = "=".length;
-                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-                    }
-                }
-                else if (!node.initializer) {
-                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
-                    }
-                    if (ts.isConst(node)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
-                    }
-                }
-            }
-            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
-            // 1. LexicalDeclaration : LetOrConst BindingList ;
-            // It is a Syntax Error if the BoundNames of BindingList contains "let".
-            // 2. ForDeclaration: ForDeclaration : LetOrConst ForBinding
-            // It is a Syntax Error if the BoundNames of ForDeclaration contains "let".
-            // It is a SyntaxError if a VariableDeclaration or VariableDeclarationNoIn occurs within strict code
-            // and its Identifier is eval or arguments
-            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
-        }
-        function checkGrammarNameInLetOrConstDeclarations(name) {
-            if (name.kind === 69 /* Identifier */) {
-                if (name.originalKeywordKind === 108 /* LetKeyword */) {
-                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
-                }
-            }
-            else {
-                var elements = name.elements;
-                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
-                    var element = elements_2[_i];
-                    if (element.kind !== 193 /* OmittedExpression */) {
-                        checkGrammarNameInLetOrConstDeclarations(element.name);
-                    }
-                }
-            }
-        }
-        function checkGrammarVariableDeclarationList(declarationList) {
-            var declarations = declarationList.declarations;
-            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
-                return true;
-            }
-            if (!declarationList.declarations.length) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
-            }
-        }
-        function allowLetAndConstDeclarations(parent) {
-            switch (parent.kind) {
-                case 203 /* IfStatement */:
-                case 204 /* DoStatement */:
-                case 205 /* WhileStatement */:
-                case 212 /* WithStatement */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                    return false;
-                case 214 /* LabeledStatement */:
-                    return allowLetAndConstDeclarations(parent.parent);
-            }
-            return true;
-        }
-        function checkGrammarForDisallowedLetOrConstStatement(node) {
-            if (!allowLetAndConstDeclarations(node.parent)) {
-                if (ts.isLet(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
-                }
-                else if (ts.isConst(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
-                }
-            }
-        }
-        function hasParseDiagnostics(sourceFile) {
-            return sourceFile.parseDiagnostics.length > 0;
-        }
-        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function checkGrammarConstructorTypeParameters(node) {
-            if (node.typeParameters) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
-            }
-        }
-        function checkGrammarConstructorTypeAnnotation(node) {
-            if (node.type) {
-                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
-            }
-        }
-        function checkGrammarProperty(node) {
-            if (ts.isClassLike(node.parent)) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-            }
-            else if (node.parent.kind === 222 /* InterfaceDeclaration */) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
-                }
-            }
-            else if (node.parent.kind === 159 /* TypeLiteral */) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
-                }
-            }
-            if (ts.isInAmbientContext(node) && node.initializer) {
-                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-            }
-        }
-        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
-            // A declare modifier is required for any top level .d.ts declaration except export=, export default,
-            // interfaces and imports categories:
-            //
-            //  DeclarationElement:
-            //     ExportAssignment
-            //     export_opt   InterfaceDeclaration
-            //     export_opt   TypeAliasDeclaration
-            //     export_opt   ImportDeclaration
-            //     export_opt   ExternalImportDeclaration
-            //     export_opt   AmbientDeclaration
-            //
-            // TODO: The spec needs to be amended to reflect this grammar.
-            if (node.kind === 222 /* InterfaceDeclaration */ ||
-                node.kind === 223 /* TypeAliasDeclaration */ ||
-                node.kind === 230 /* ImportDeclaration */ ||
-                node.kind === 229 /* ImportEqualsDeclaration */ ||
-                node.kind === 236 /* ExportDeclaration */ ||
-                node.kind === 235 /* ExportAssignment */ ||
-                (node.flags & 2 /* Ambient */) ||
-                (node.flags & (1 /* Export */ | 512 /* Default */))) {
-                return false;
-            }
-            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
-        }
-        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
-            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
-                var decl = _a[_i];
-                if (ts.isDeclaration(decl) || decl.kind === 200 /* VariableStatement */) {
-                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
-                        return true;
-                    }
-                }
-            }
-        }
-        function checkGrammarSourceFile(node) {
-            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
-        }
-        function checkGrammarStatementInAmbientContext(node) {
-            if (ts.isInAmbientContext(node)) {
-                // An accessors is already reported about the ambient context
-                if (isAccessor(node.parent.kind)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
-                }
-                // Find containing block which is either Block, ModuleBlock, SourceFile
-                var links = getNodeLinks(node);
-                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
-                }
-                // We are either parented by another statement, or some sort of block.
-                // If we're in a block, we only want to really report an error once
-                // to prevent noisiness.  So use a bit on the block to indicate if
-                // this has already been reported, and don't report if it has.
-                //
-                if (node.parent.kind === 199 /* Block */ || node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                    var links_1 = getNodeLinks(node.parent);
-                    // Check if the containing block ever report this error
-                    if (!links_1.hasReportedStatementInAmbientContext) {
-                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
-                    }
-                }
-                else {
-                }
-            }
-        }
-        function checkGrammarNumericLiteral(node) {
-            // Grammar checking
-            if (node.isOctalLiteral && languageVersion >= 1 /* ES5 */) {
-                return grammarErrorOnNode(node, ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
-            }
-        }
-        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span), /*length*/ 0, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        var _a;
-    }
-    ts.createTypeChecker = createTypeChecker;
-})(ts || (ts = {}));
-/// <reference path="checker.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var nullSourceMapWriter;
-    // Used for initialize lastEncodedSourceMapSpan and reset lastEncodedSourceMapSpan when updateLastEncodedAndRecordedSpans
-    var defaultLastEncodedSourceMapSpan = {
-        emittedLine: 1,
-        emittedColumn: 1,
-        sourceLine: 1,
-        sourceColumn: 1,
-        sourceIndex: 0
-    };
-    function getNullSourceMapWriter() {
-        if (nullSourceMapWriter === undefined) {
-            nullSourceMapWriter = {
-                getSourceMapData: function () { return undefined; },
-                setSourceFile: function (sourceFile) { },
-                emitStart: function (range) { },
-                emitEnd: function (range, stopOverridingSpan) { },
-                emitPos: function (pos) { },
-                changeEmitSourcePos: function () { },
-                getText: function () { return undefined; },
-                getSourceMappingURL: function () { return undefined; },
-                initialize: function (filePath, sourceMapFilePath, sourceFiles, isBundledEmit) { },
-                reset: function () { }
-            };
-        }
-        return nullSourceMapWriter;
-    }
-    ts.getNullSourceMapWriter = getNullSourceMapWriter;
-    function createSourceMapWriter(host, writer) {
-        var compilerOptions = host.getCompilerOptions();
-        var currentSourceFile;
-        var sourceMapDir; // The directory in which sourcemap will be
-        var stopOverridingSpan = false;
-        var modifyLastSourcePos = false;
-        // Current source map file and its index in the sources list
-        var sourceMapSourceIndex;
-        // Last recorded and encoded spans
-        var lastRecordedSourceMapSpan;
-        var lastEncodedSourceMapSpan;
-        var lastEncodedNameIndex;
-        // Source map data
-        var sourceMapData;
-        return {
-            getSourceMapData: function () { return sourceMapData; },
-            setSourceFile: setSourceFile,
-            emitPos: emitPos,
-            emitStart: emitStart,
-            emitEnd: emitEnd,
-            changeEmitSourcePos: changeEmitSourcePos,
-            getText: getText,
-            getSourceMappingURL: getSourceMappingURL,
-            initialize: initialize,
-            reset: reset
-        };
-        function initialize(filePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
-            if (sourceMapData) {
-                reset();
-            }
-            currentSourceFile = undefined;
-            // Current source map file and its index in the sources list
-            sourceMapSourceIndex = -1;
-            // Last recorded and encoded spans
-            lastRecordedSourceMapSpan = undefined;
-            lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
-            lastEncodedNameIndex = 0;
-            // Initialize source map data
-            sourceMapData = {
-                sourceMapFilePath: sourceMapFilePath,
-                jsSourceMappingURL: !compilerOptions.inlineSourceMap ? ts.getBaseFileName(ts.normalizeSlashes(sourceMapFilePath)) : undefined,
-                sourceMapFile: ts.getBaseFileName(ts.normalizeSlashes(filePath)),
-                sourceMapSourceRoot: compilerOptions.sourceRoot || "",
-                sourceMapSources: [],
-                inputSourceFileNames: [],
-                sourceMapNames: [],
-                sourceMapMappings: "",
-                sourceMapSourcesContent: compilerOptions.inlineSources ? [] : undefined,
-                sourceMapDecodedMappings: []
-            };
-            // Normalize source root and make sure it has trailing "/" so that it can be used to combine paths with the
-            // relative paths of the sources list in the sourcemap
-            sourceMapData.sourceMapSourceRoot = ts.normalizeSlashes(sourceMapData.sourceMapSourceRoot);
-            if (sourceMapData.sourceMapSourceRoot.length && sourceMapData.sourceMapSourceRoot.charCodeAt(sourceMapData.sourceMapSourceRoot.length - 1) !== 47 /* slash */) {
-                sourceMapData.sourceMapSourceRoot += ts.directorySeparator;
-            }
-            if (compilerOptions.mapRoot) {
-                sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
-                if (!isBundledEmit) {
-                    ts.Debug.assert(sourceFiles.length === 1);
-                    // For modules or multiple emit files the mapRoot will have directory structure like the sources
-                    // So if src\a.ts and src\lib\b.ts are compiled together user would be moving the maps into mapRoot\a.js.map and mapRoot\lib\b.js.map
-                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFiles[0], host, sourceMapDir));
-                }
-                if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
-                    // The relative paths are relative to the common directory
-                    sourceMapDir = ts.combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
-                    sourceMapData.jsSourceMappingURL = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizePath(filePath)), // get the relative sourceMapDir path based on jsFilePath
-                    ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), // this is where user expects to see sourceMap
-                    host.getCurrentDirectory(), host.getCanonicalFileName, 
-                    /*isAbsolutePathAnUrl*/ true);
-                }
-                else {
-                    sourceMapData.jsSourceMappingURL = ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL);
-                }
-            }
-            else {
-                sourceMapDir = ts.getDirectoryPath(ts.normalizePath(filePath));
-            }
-        }
-        function reset() {
-            currentSourceFile = undefined;
-            sourceMapDir = undefined;
-            sourceMapSourceIndex = undefined;
-            lastRecordedSourceMapSpan = undefined;
-            lastEncodedSourceMapSpan = undefined;
-            lastEncodedNameIndex = undefined;
-            sourceMapData = undefined;
-        }
-        function updateLastEncodedAndRecordedSpans() {
-            if (modifyLastSourcePos) {
-                // Reset the source pos
-                modifyLastSourcePos = false;
-                // Change Last recorded Map with last encoded emit line and character
-                lastRecordedSourceMapSpan.emittedLine = lastEncodedSourceMapSpan.emittedLine;
-                lastRecordedSourceMapSpan.emittedColumn = lastEncodedSourceMapSpan.emittedColumn;
-                // Pop sourceMapDecodedMappings to remove last entry
-                sourceMapData.sourceMapDecodedMappings.pop();
-                // Point the lastEncodedSourceMapSpace to the previous encoded sourceMapSpan
-                // If the list is empty which indicates that we are at the beginning of the file,
-                // we have to reset it to default value (same value when we first initialize sourceMapWriter)
-                lastEncodedSourceMapSpan = sourceMapData.sourceMapDecodedMappings.length ?
-                    sourceMapData.sourceMapDecodedMappings[sourceMapData.sourceMapDecodedMappings.length - 1] :
-                    defaultLastEncodedSourceMapSpan;
-                // TODO: Update lastEncodedNameIndex 
-                // Since we dont support this any more, lets not worry about it right now.
-                // When we start supporting nameIndex, we will get back to this
-                // Change the encoded source map
-                var sourceMapMappings = sourceMapData.sourceMapMappings;
-                var lenthToSet = sourceMapMappings.length - 1;
-                for (; lenthToSet >= 0; lenthToSet--) {
-                    var currentChar = sourceMapMappings.charAt(lenthToSet);
-                    if (currentChar === ",") {
-                        // Separator for the entry found
-                        break;
-                    }
-                    if (currentChar === ";" && lenthToSet !== 0 && sourceMapMappings.charAt(lenthToSet - 1) !== ";") {
-                        // Last line separator found
-                        break;
-                    }
-                }
-                sourceMapData.sourceMapMappings = sourceMapMappings.substr(0, Math.max(0, lenthToSet));
-            }
-        }
-        // Encoding for sourcemap span
-        function encodeLastRecordedSourceMapSpan() {
-            if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) {
-                return;
-            }
-            var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn;
-            // Line/Comma delimiters
-            if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) {
-                // Emit comma to separate the entry
-                if (sourceMapData.sourceMapMappings) {
-                    sourceMapData.sourceMapMappings += ",";
-                }
-            }
-            else {
-                // Emit line delimiters
-                for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) {
-                    sourceMapData.sourceMapMappings += ";";
-                }
-                prevEncodedEmittedColumn = 1;
-            }
-            // 1. Relative Column 0 based
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn);
-            // 2. Relative sourceIndex
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex);
-            // 3. Relative sourceLine 0 based
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine);
-            // 4. Relative sourceColumn 0 based
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn);
-            // 5. Relative namePosition 0 based
-            if (lastRecordedSourceMapSpan.nameIndex >= 0) {
-                ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this");
-                sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex);
-                lastEncodedNameIndex = lastRecordedSourceMapSpan.nameIndex;
-            }
-            lastEncodedSourceMapSpan = lastRecordedSourceMapSpan;
-            sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan);
-        }
-        function emitPos(pos) {
-            if (pos === -1) {
-                return;
-            }
-            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSourceFile, pos);
-            // Convert the location to be one-based.
-            sourceLinePos.line++;
-            sourceLinePos.character++;
-            var emittedLine = writer.getLine();
-            var emittedColumn = writer.getColumn();
-            // If this location wasn't recorded or the location in source is going backwards, record the span
-            if (!lastRecordedSourceMapSpan ||
-                lastRecordedSourceMapSpan.emittedLine !== emittedLine ||
-                lastRecordedSourceMapSpan.emittedColumn !== emittedColumn ||
-                (lastRecordedSourceMapSpan.sourceIndex === sourceMapSourceIndex &&
-                    (lastRecordedSourceMapSpan.sourceLine > sourceLinePos.line ||
-                        (lastRecordedSourceMapSpan.sourceLine === sourceLinePos.line && lastRecordedSourceMapSpan.sourceColumn > sourceLinePos.character)))) {
-                // Encode the last recordedSpan before assigning new
-                encodeLastRecordedSourceMapSpan();
-                // New span
-                lastRecordedSourceMapSpan = {
-                    emittedLine: emittedLine,
-                    emittedColumn: emittedColumn,
-                    sourceLine: sourceLinePos.line,
-                    sourceColumn: sourceLinePos.character,
-                    sourceIndex: sourceMapSourceIndex
-                };
-                stopOverridingSpan = false;
-            }
-            else if (!stopOverridingSpan) {
-                // Take the new pos instead since there is no change in emittedLine and column since last location
-                lastRecordedSourceMapSpan.sourceLine = sourceLinePos.line;
-                lastRecordedSourceMapSpan.sourceColumn = sourceLinePos.character;
-                lastRecordedSourceMapSpan.sourceIndex = sourceMapSourceIndex;
-            }
-            updateLastEncodedAndRecordedSpans();
-        }
-        function getStartPos(range) {
-            var rangeHasDecorators = !!range.decorators;
-            return range.pos !== -1 ? ts.skipTrivia(currentSourceFile.text, rangeHasDecorators ? range.decorators.end : range.pos) : -1;
-        }
-        function emitStart(range) {
-            emitPos(getStartPos(range));
-        }
-        function emitEnd(range, stopOverridingEnd) {
-            emitPos(range.end);
-            stopOverridingSpan = stopOverridingEnd;
-        }
-        function changeEmitSourcePos() {
-            ts.Debug.assert(!modifyLastSourcePos);
-            modifyLastSourcePos = true;
-        }
-        function setSourceFile(sourceFile) {
-            currentSourceFile = sourceFile;
-            // Add the file to tsFilePaths
-            // If sourceroot option: Use the relative path corresponding to the common directory path
-            // otherwise source locations relative to map file location
-            var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
-            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSourceFile.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
-            /*isAbsolutePathAnUrl*/ true);
-            sourceMapSourceIndex = ts.indexOf(sourceMapData.sourceMapSources, source);
-            if (sourceMapSourceIndex === -1) {
-                sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
-                sourceMapData.sourceMapSources.push(source);
-                // The one that can be used from program to get the actual source file
-                sourceMapData.inputSourceFileNames.push(sourceFile.fileName);
-                if (compilerOptions.inlineSources) {
-                    sourceMapData.sourceMapSourcesContent.push(sourceFile.text);
-                }
-            }
-        }
-        function getText() {
-            encodeLastRecordedSourceMapSpan();
-            return ts.stringify({
-                version: 3,
-                file: sourceMapData.sourceMapFile,
-                sourceRoot: sourceMapData.sourceMapSourceRoot,
-                sources: sourceMapData.sourceMapSources,
-                names: sourceMapData.sourceMapNames,
-                mappings: sourceMapData.sourceMapMappings,
-                sourcesContent: sourceMapData.sourceMapSourcesContent
-            });
-        }
-        function getSourceMappingURL() {
-            if (compilerOptions.inlineSourceMap) {
-                // Encode the sourceMap into the sourceMap url
-                var base64SourceMapText = ts.convertToBase64(getText());
-                return sourceMapData.jsSourceMappingURL = "data:application/json;base64," + base64SourceMapText;
-            }
-            else {
-                return sourceMapData.jsSourceMappingURL;
-            }
-        }
-    }
-    ts.createSourceMapWriter = createSourceMapWriter;
-    var base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-    function base64FormatEncode(inValue) {
-        if (inValue < 64) {
-            return base64Chars.charAt(inValue);
-        }
-        throw TypeError(inValue + ": not a 64 based value");
-    }
-    function base64VLQFormatEncode(inValue) {
-        // Add a new least significant bit that has the sign of the value.
-        // if negative number the least significant bit that gets added to the number has value 1
-        // else least significant bit value that gets added is 0
-        // eg. -1 changes to binary : 01 [1] => 3
-        //     +1 changes to binary : 01 [0] => 2
-        if (inValue < 0) {
-            inValue = ((-inValue) << 1) + 1;
-        }
-        else {
-            inValue = inValue << 1;
-        }
-        // Encode 5 bits at a time starting from least significant bits
-        var encodedStr = "";
-        do {
-            var currentDigit = inValue & 31; // 11111
-            inValue = inValue >> 5;
-            if (inValue > 0) {
-                // There are still more digits to decode, set the msb (6th bit)
-                currentDigit = currentDigit | 32;
-            }
-            encodedStr = encodedStr + base64FormatEncode(currentDigit);
-        } while (inValue > 0);
-        return encodedStr;
-    }
-})(ts || (ts = {}));
-/// <reference path="checker.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
-        var declarationDiagnostics = ts.createDiagnosticCollection();
-        ts.forEachExpectedEmitFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
-        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
-        function getDeclarationDiagnosticsFromFile(_a, sources, isBundledEmit) {
-            var declarationFilePath = _a.declarationFilePath;
-            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sources, isBundledEmit);
-        }
-    }
-    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
-    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit) {
-        var newLine = host.getNewLine();
-        var compilerOptions = host.getCompilerOptions();
-        var write;
-        var writeLine;
-        var increaseIndent;
-        var decreaseIndent;
-        var writeTextOfNode;
-        var writer;
-        createAndSetNewTextWriterWithSymbolWriter();
-        var enclosingDeclaration;
-        var resultHasExternalModuleIndicator;
-        var currentText;
-        var currentLineMap;
-        var currentIdentifiers;
-        var isCurrentFileExternalModule;
-        var reportedDeclarationError = false;
-        var errorNameNode;
-        var emitJsDocComments = compilerOptions.removeComments ? function (declaration) { } : writeJsDocComments;
-        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
-        var noDeclare;
-        var moduleElementDeclarationEmitInfo = [];
-        var asynchronousSubModuleDeclarationEmitInfo;
-        // Contains the reference paths that needs to go in the declaration file.
-        // Collecting this separately because reference paths need to be first thing in the declaration file
-        // and we could be collecting these paths from multiple files into single one with --out option
-        var referencesOutput = "";
-        var usedTypeDirectiveReferences;
-        // Emit references corresponding to each file
-        var emittedReferencedFiles = [];
-        var addedGlobalFileReference = false;
-        var allSourcesModuleElementDeclarationEmitInfo = [];
-        ts.forEach(sourceFiles, function (sourceFile) {
-            // Dont emit for javascript file
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                return;
-            }
-            // Check what references need to be added
-            if (!compilerOptions.noResolve) {
-                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
-                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
-                    // Emit reference in dts, if the file reference was not already emitted
-                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
-                        // Add a reference to generated dts file,
-                        // global file reference is added only 
-                        //  - if it is not bundled emit (because otherwise it would be self reference)
-                        //  - and it is not already added
-                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference)) {
-                            addedGlobalFileReference = true;
-                        }
-                        emittedReferencedFiles.push(referencedFile);
-                    }
-                });
-            }
-            resultHasExternalModuleIndicator = false;
-            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
-                noDeclare = false;
-                emitSourceFile(sourceFile);
-            }
-            else if (ts.isExternalModule(sourceFile)) {
-                noDeclare = true;
-                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
-                writeLine();
-                increaseIndent();
-                emitSourceFile(sourceFile);
-                decreaseIndent();
-                write("}");
-                writeLine();
-            }
-            // create asynchronous output for the importDeclarations
-            if (moduleElementDeclarationEmitInfo.length) {
-                var oldWriter = writer;
-                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
-                        ts.Debug.assert(aliasEmitInfo.node.kind === 230 /* ImportDeclaration */);
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            increaseIndent();
-                        }
-                        writeImportDeclaration(aliasEmitInfo.node);
-                        aliasEmitInfo.asynchronousOutput = writer.getText();
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            decreaseIndent();
-                        }
-                    }
-                });
-                setWriter(oldWriter);
-                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
-                moduleElementDeclarationEmitInfo = [];
-            }
-            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
-                // if file was external module with augmentations - this fact should be preserved in .d.ts as well.
-                // in case if we didn't write any external module specifiers in .d.ts we need to emit something 
-                // that will force compiler to think that this file is an external module - 'export {}' is a reasonable choice here.
-                write("export {};");
-                writeLine();
-            }
-        });
-        if (usedTypeDirectiveReferences) {
-            for (var directive in usedTypeDirectiveReferences) {
-                if (ts.hasProperty(usedTypeDirectiveReferences, directive)) {
-                    referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
-                }
-            }
-        }
-        return {
-            reportedDeclarationError: reportedDeclarationError,
-            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
-            synchronousDeclarationOutput: writer.getText(),
-            referencesOutput: referencesOutput
-        };
-        function hasInternalAnnotation(range) {
-            var comment = currentText.substring(range.pos, range.end);
-            return comment.indexOf("@internal") >= 0;
-        }
-        function stripInternal(node) {
-            if (node) {
-                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
-                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
-                    return;
-                }
-                emitNode(node);
-            }
-        }
-        function createAndSetNewTextWriterWithSymbolWriter() {
-            var writer = ts.createTextWriter(newLine);
-            writer.trackSymbol = trackSymbol;
-            writer.reportInaccessibleThisError = reportInaccessibleThisError;
-            writer.writeKeyword = writer.write;
-            writer.writeOperator = writer.write;
-            writer.writePunctuation = writer.write;
-            writer.writeSpace = writer.write;
-            writer.writeStringLiteral = writer.writeLiteral;
-            writer.writeParameter = writer.write;
-            writer.writeSymbol = writer.write;
-            setWriter(writer);
-        }
-        function setWriter(newWriter) {
-            writer = newWriter;
-            write = newWriter.write;
-            writeTextOfNode = newWriter.writeTextOfNode;
-            writeLine = newWriter.writeLine;
-            increaseIndent = newWriter.increaseIndent;
-            decreaseIndent = newWriter.decreaseIndent;
-        }
-        function writeAsynchronousModuleElements(nodes) {
-            var oldWriter = writer;
-            ts.forEach(nodes, function (declaration) {
-                var nodeToCheck;
-                if (declaration.kind === 218 /* VariableDeclaration */) {
-                    nodeToCheck = declaration.parent.parent;
-                }
-                else if (declaration.kind === 233 /* NamedImports */ || declaration.kind === 234 /* ImportSpecifier */ || declaration.kind === 231 /* ImportClause */) {
-                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
-                }
-                else {
-                    nodeToCheck = declaration;
-                }
-                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
-                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                }
-                // If the alias was marked as not visible when we saw its declaration, we would have saved the aliasEmitInfo, but if we haven't yet visited the alias declaration
-                // then we don't need to write it at this point. We will write it when we actually see its declaration
-                // Eg.
-                // export function bar(a: foo.Foo) { }
-                // import foo = require("foo");
-                // Writing of function bar would mark alias declaration foo as visible but we haven't yet visited that declaration so do nothing,
-                // we would write alias foo declaration when we visit it since it would now be marked as visible
-                if (moduleElementEmitInfo) {
-                    if (moduleElementEmitInfo.node.kind === 230 /* ImportDeclaration */) {
-                        // we have to create asynchronous output only after we have collected complete information
-                        // because it is possible to enable multiple bindings as asynchronously visible
-                        moduleElementEmitInfo.isVisible = true;
-                    }
-                    else {
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
-                            increaseIndent();
-                        }
-                        if (nodeToCheck.kind === 225 /* ModuleDeclaration */) {
-                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
-                            asynchronousSubModuleDeclarationEmitInfo = [];
-                        }
-                        writeModuleElement(nodeToCheck);
-                        if (nodeToCheck.kind === 225 /* ModuleDeclaration */) {
-                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
-                            asynchronousSubModuleDeclarationEmitInfo = undefined;
-                        }
-                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
-                    }
-                }
-            });
-            setWriter(oldWriter);
-        }
-        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
-            if (!typeReferenceDirectives) {
-                return;
-            }
-            if (!usedTypeDirectiveReferences) {
-                usedTypeDirectiveReferences = {};
-            }
-            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
-                var directive = typeReferenceDirectives_1[_i];
-                if (!ts.hasProperty(usedTypeDirectiveReferences, directive)) {
-                    usedTypeDirectiveReferences[directive] = directive;
-                }
-            }
-        }
-        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
-            if (symbolAccessibilityResult.accessibility === 0 /* Accessible */) {
-                // write the aliases
-                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
-                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
-                }
-            }
-            else {
-                // Report error
-                reportedDeclarationError = true;
-                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
-                if (errorInfo) {
-                    if (errorInfo.typeName) {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                    else {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                }
-            }
-        }
-        function trackSymbol(symbol, enclosingDeclaration, meaning) {
-            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning));
-            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
-        }
-        function reportInaccessibleThisError() {
-            if (errorNameNode) {
-                reportedDeclarationError = true;
-                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
-            }
-        }
-        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (type) {
-                // Write the type
-                emitType(type);
-            }
-            else {
-                errorNameNode = declaration.name;
-                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (signature.type) {
-                // Write the type
-                emitType(signature.type);
-            }
-            else {
-                errorNameNode = signature.name;
-                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function emitLines(nodes) {
-            for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
-                var node = nodes_2[_i];
-                emit(node);
-            }
-        }
-        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
-            var currentWriterPos = writer.getTextPos();
-            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
-                var node = nodes_3[_i];
-                if (!canEmitFn || canEmitFn(node)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        write(separator);
-                    }
-                    currentWriterPos = writer.getTextPos();
-                    eachNodeEmitFn(node);
-                }
-            }
-        }
-        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
-            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
-        }
-        function writeJsDocComments(declaration) {
-            if (declaration) {
-                var jsDocComments = ts.getJsDocCommentsFromText(declaration, currentText);
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
-                // jsDoc comments are emitted at /*leading comment1 */space/*leading comment*/space
-                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, /*trailingSeparator*/ true, newLine, ts.writeCommentRange);
-            }
-        }
-        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            emitType(type);
-        }
-        function emitType(type) {
-            switch (type.kind) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 103 /* VoidKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 93 /* NullKeyword */:
-                case 127 /* NeverKeyword */:
-                case 165 /* ThisType */:
-                case 166 /* StringLiteralType */:
-                    return writeTextOfNode(currentText, type);
-                case 194 /* ExpressionWithTypeArguments */:
-                    return emitExpressionWithTypeArguments(type);
-                case 155 /* TypeReference */:
-                    return emitTypeReference(type);
-                case 158 /* TypeQuery */:
-                    return emitTypeQuery(type);
-                case 160 /* ArrayType */:
-                    return emitArrayType(type);
-                case 161 /* TupleType */:
-                    return emitTupleType(type);
-                case 162 /* UnionType */:
-                    return emitUnionType(type);
-                case 163 /* IntersectionType */:
-                    return emitIntersectionType(type);
-                case 164 /* ParenthesizedType */:
-                    return emitParenType(type);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                    return emitSignatureDeclarationWithJsDocComments(type);
-                case 159 /* TypeLiteral */:
-                    return emitTypeLiteral(type);
-                case 69 /* Identifier */:
-                    return emitEntityName(type);
-                case 139 /* QualifiedName */:
-                    return emitEntityName(type);
-                case 154 /* TypePredicate */:
-                    return emitTypePredicate(type);
-            }
-            function writeEntityName(entityName) {
-                if (entityName.kind === 69 /* Identifier */) {
-                    writeTextOfNode(currentText, entityName);
-                }
-                else {
-                    var left = entityName.kind === 139 /* QualifiedName */ ? entityName.left : entityName.expression;
-                    var right = entityName.kind === 139 /* QualifiedName */ ? entityName.right : entityName.name;
-                    writeEntityName(left);
-                    write(".");
-                    writeTextOfNode(currentText, right);
-                }
-            }
-            function emitEntityName(entityName) {
-                var visibilityResult = resolver.isEntityNameVisible(entityName, 
-                // Aliases can be written asynchronously so use correct enclosing declaration
-                entityName.parent.kind === 229 /* ImportEqualsDeclaration */ ? entityName.parent : enclosingDeclaration);
-                handleSymbolAccessibilityError(visibilityResult);
-                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
-                writeEntityName(entityName);
-            }
-            function emitExpressionWithTypeArguments(node) {
-                if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                    ts.Debug.assert(node.expression.kind === 69 /* Identifier */ || node.expression.kind === 172 /* PropertyAccessExpression */);
-                    emitEntityName(node.expression);
-                    if (node.typeArguments) {
-                        write("<");
-                        emitCommaList(node.typeArguments, emitType);
-                        write(">");
-                    }
-                }
-            }
-            function emitTypeReference(type) {
-                emitEntityName(type.typeName);
-                if (type.typeArguments) {
-                    write("<");
-                    emitCommaList(type.typeArguments, emitType);
-                    write(">");
-                }
-            }
-            function emitTypePredicate(type) {
-                writeTextOfNode(currentText, type.parameterName);
-                write(" is ");
-                emitType(type.type);
-            }
-            function emitTypeQuery(type) {
-                write("typeof ");
-                emitEntityName(type.exprName);
-            }
-            function emitArrayType(type) {
-                emitType(type.elementType);
-                write("[]");
-            }
-            function emitTupleType(type) {
-                write("[");
-                emitCommaList(type.elementTypes, emitType);
-                write("]");
-            }
-            function emitUnionType(type) {
-                emitSeparatedList(type.types, " | ", emitType);
-            }
-            function emitIntersectionType(type) {
-                emitSeparatedList(type.types, " & ", emitType);
-            }
-            function emitParenType(type) {
-                write("(");
-                emitType(type.type);
-                write(")");
-            }
-            function emitTypeLiteral(type) {
-                write("{");
-                if (type.members.length) {
-                    writeLine();
-                    increaseIndent();
-                    // write members
-                    emitLines(type.members);
-                    decreaseIndent();
-                }
-                write("}");
-            }
-        }
-        function emitSourceFile(node) {
-            currentText = node.text;
-            currentLineMap = ts.getLineStarts(node);
-            currentIdentifiers = node.identifiers;
-            isCurrentFileExternalModule = ts.isExternalModule(node);
-            enclosingDeclaration = node;
-            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, true /* remove comments */);
-            emitLines(node.statements);
-        }
-        // Return a temp variable name to be used in `export default` statements.
-        // The temp name will be of the form _default_counter.
-        // Note that export default is only allowed at most once in a module, so we
-        // do not need to keep track of created temp names.
-        function getExportDefaultTempVariableName() {
-            var baseName = "_default";
-            if (!ts.hasProperty(currentIdentifiers, baseName)) {
-                return baseName;
-            }
-            var count = 0;
-            while (true) {
-                count++;
-                var name_22 = baseName + "_" + count;
-                if (!ts.hasProperty(currentIdentifiers, name_22)) {
-                    return name_22;
-                }
-            }
-        }
-        function emitExportAssignment(node) {
-            if (node.expression.kind === 69 /* Identifier */) {
-                write(node.isExportEquals ? "export = " : "export default ");
-                writeTextOfNode(currentText, node.expression);
-            }
-            else {
-                // Expression
-                var tempVarName = getExportDefaultTempVariableName();
-                if (!noDeclare) {
-                    write("declare ");
-                }
-                write("var ");
-                write(tempVarName);
-                write(": ");
-                writer.getSymbolAccessibilityDiagnostic = getDefaultExportAccessibilityDiagnostic;
-                resolver.writeTypeOfExpression(node.expression, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
-                write(";");
-                writeLine();
-                write(node.isExportEquals ? "export = " : "export default ");
-                write(tempVarName);
-            }
-            write(";");
-            writeLine();
-            // Make all the declarations visible for the export name
-            if (node.expression.kind === 69 /* Identifier */) {
-                var nodes = resolver.collectLinkedAliases(node.expression);
-                // write each of these declarations asynchronously
-                writeAsynchronousModuleElements(nodes);
-            }
-            function getDefaultExportAccessibilityDiagnostic(diagnostic) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
-                    errorNode: node
-                };
-            }
-        }
-        function isModuleElementVisible(node) {
-            return resolver.isDeclarationVisible(node);
-        }
-        function emitModuleElement(node, isModuleElementVisible) {
-            if (isModuleElementVisible) {
-                writeModuleElement(node);
-            }
-            else if (node.kind === 229 /* ImportEqualsDeclaration */ ||
-                (node.parent.kind === 256 /* SourceFile */ && isCurrentFileExternalModule)) {
-                var isVisible = void 0;
-                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 256 /* SourceFile */) {
-                    // Import declaration of another module that is visited async so lets put it in right spot
-                    asynchronousSubModuleDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-                else {
-                    if (node.kind === 230 /* ImportDeclaration */) {
-                        var importDeclaration = node;
-                        if (importDeclaration.importClause) {
-                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
-                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
-                        }
-                    }
-                    moduleElementDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-            }
-        }
-        function writeModuleElement(node) {
-            switch (node.kind) {
-                case 220 /* FunctionDeclaration */:
-                    return writeFunctionDeclaration(node);
-                case 200 /* VariableStatement */:
-                    return writeVariableStatement(node);
-                case 222 /* InterfaceDeclaration */:
-                    return writeInterfaceDeclaration(node);
-                case 221 /* ClassDeclaration */:
-                    return writeClassDeclaration(node);
-                case 223 /* TypeAliasDeclaration */:
-                    return writeTypeAliasDeclaration(node);
-                case 224 /* EnumDeclaration */:
-                    return writeEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
-                    return writeModuleDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
-                    return writeImportEqualsDeclaration(node);
-                case 230 /* ImportDeclaration */:
-                    return writeImportDeclaration(node);
-                default:
-                    ts.Debug.fail("Unknown symbol kind");
-            }
-        }
-        function emitModuleElementDeclarationFlags(node) {
-            // If the node is parented in the current source file we need to emit export declare or just export
-            if (node.parent.kind === 256 /* SourceFile */) {
-                // If the node is exported
-                if (node.flags & 1 /* Export */) {
-                    write("export ");
-                }
-                if (node.flags & 512 /* Default */) {
-                    write("default ");
-                }
-                else if (node.kind !== 222 /* InterfaceDeclaration */ && !noDeclare) {
-                    write("declare ");
-                }
-            }
-        }
-        function emitClassMemberDeclarationFlags(flags) {
-            if (flags & 8 /* Private */) {
-                write("private ");
-            }
-            else if (flags & 16 /* Protected */) {
-                write("protected ");
-            }
-            if (flags & 32 /* Static */) {
-                write("static ");
-            }
-            if (flags & 64 /* Readonly */) {
-                write("readonly ");
-            }
-            if (flags & 128 /* Abstract */) {
-                write("abstract ");
-            }
-        }
-        function writeImportEqualsDeclaration(node) {
-            // note usage of writer. methods instead of aliases created, just to make sure we are using
-            // correct writer especially to handle asynchronous alias writing
-            emitJsDocComments(node);
-            if (node.flags & 1 /* Export */) {
-                write("export ");
-            }
-            write("import ");
-            writeTextOfNode(currentText, node.name);
-            write(" = ");
-            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
-                write(";");
-            }
-            else {
-                write("require(");
-                emitExternalModuleSpecifier(node);
-                write(");");
-            }
-            writer.writeLine();
-            function getImportEntityNameVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
-                    errorNode: node,
-                    typeName: node.name
-                };
-            }
-        }
-        function isVisibleNamedBinding(namedBindings) {
-            if (namedBindings) {
-                if (namedBindings.kind === 232 /* NamespaceImport */) {
-                    return resolver.isDeclarationVisible(namedBindings);
-                }
-                else {
-                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
-                }
-            }
-        }
-        function writeImportDeclaration(node) {
-            emitJsDocComments(node);
-            if (node.flags & 1 /* Export */) {
-                write("export ");
-            }
-            write("import ");
-            if (node.importClause) {
-                var currentWriterPos = writer.getTextPos();
-                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
-                    writeTextOfNode(currentText, node.importClause.name);
-                }
-                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        // If the default binding was emitted, write the separated
-                        write(", ");
-                    }
-                    if (node.importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                        write("* as ");
-                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
-                    }
-                    else {
-                        write("{ ");
-                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
-                        write(" }");
-                    }
-                }
-                write(" from ");
-            }
-            emitExternalModuleSpecifier(node);
-            write(";");
-            writer.writeLine();
-        }
-        function emitExternalModuleSpecifier(parent) {
-            // emitExternalModuleSpecifier is usually called when we emit something in the.d.ts file that will make it an external module (i.e. import/export declarations).
-            // the only case when it is not true is when we call it to emit correct name for module augmentation - d.ts files with just module augmentations are not considered 
-            // external modules since they are indistinguishable from script files with ambient modules. To fix this in such d.ts files we'll emit top level 'export {}'
-            // so compiler will treat them as external modules.
-            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 225 /* ModuleDeclaration */;
-            var moduleSpecifier;
-            if (parent.kind === 229 /* ImportEqualsDeclaration */) {
-                var node = parent;
-                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
-            }
-            else if (parent.kind === 225 /* ModuleDeclaration */) {
-                moduleSpecifier = parent.name;
-            }
-            else {
-                var node = parent;
-                moduleSpecifier = node.moduleSpecifier;
-            }
-            if (moduleSpecifier.kind === 9 /* StringLiteral */ && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
-                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
-                if (moduleName) {
-                    write('"');
-                    write(moduleName);
-                    write('"');
-                    return;
-                }
-            }
-            writeTextOfNode(currentText, moduleSpecifier);
-        }
-        function emitImportOrExportSpecifier(node) {
-            if (node.propertyName) {
-                writeTextOfNode(currentText, node.propertyName);
-                write(" as ");
-            }
-            writeTextOfNode(currentText, node.name);
-        }
-        function emitExportSpecifier(node) {
-            emitImportOrExportSpecifier(node);
-            // Make all the declarations visible for the export name
-            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
-            // write each of these declarations asynchronously
-            writeAsynchronousModuleElements(nodes);
-        }
-        function emitExportDeclaration(node) {
-            emitJsDocComments(node);
-            write("export ");
-            if (node.exportClause) {
-                write("{ ");
-                emitCommaList(node.exportClause.elements, emitExportSpecifier);
-                write(" }");
-            }
-            else {
-                write("*");
-            }
-            if (node.moduleSpecifier) {
-                write(" from ");
-                emitExternalModuleSpecifier(node);
-            }
-            write(";");
-            writer.writeLine();
-        }
-        function writeModuleDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isGlobalScopeAugmentation(node)) {
-                write("global ");
-            }
-            else {
-                if (node.flags & 4096 /* Namespace */) {
-                    write("namespace ");
-                }
-                else {
-                    write("module ");
-                }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    emitExternalModuleSpecifier(node);
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                }
-            }
-            while (node.body.kind !== 226 /* ModuleBlock */) {
-                node = node.body;
-                write(".");
-                writeTextOfNode(currentText, node.name);
-            }
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.body.statements);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function writeTypeAliasDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("type ");
-            writeTextOfNode(currentText, node.name);
-            emitTypeParameters(node.typeParameters);
-            write(" = ");
-            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
-            write(";");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-            function getTypeAliasDeclarationVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
-                    errorNode: node.type,
-                    typeName: node.name
-                };
-            }
-        }
-        function writeEnumDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isConst(node)) {
-                write("const ");
-            }
-            write("enum ");
-            writeTextOfNode(currentText, node.name);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-        }
-        function emitEnumMemberDeclaration(node) {
-            emitJsDocComments(node);
-            writeTextOfNode(currentText, node.name);
-            var enumMemberValue = resolver.getConstantValue(node);
-            if (enumMemberValue !== undefined) {
-                write(" = ");
-                write(enumMemberValue.toString());
-            }
-            write(",");
-            writeLine();
-        }
-        function isPrivateMethodTypeParameter(node) {
-            return node.parent.kind === 147 /* MethodDeclaration */ && (node.parent.flags & 8 /* Private */);
-        }
-        function emitTypeParameters(typeParameters) {
-            function emitTypeParameter(node) {
-                increaseIndent();
-                emitJsDocComments(node);
-                decreaseIndent();
-                writeTextOfNode(currentText, node.name);
-                // If there is constraint present and this is not a type parameter of the private method emit the constraint
-                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
-                    write(" extends ");
-                    if (node.parent.kind === 156 /* FunctionType */ ||
-                        node.parent.kind === 157 /* ConstructorType */ ||
-                        (node.parent.parent && node.parent.parent.kind === 159 /* TypeLiteral */)) {
-                        ts.Debug.assert(node.parent.kind === 147 /* MethodDeclaration */ ||
-                            node.parent.kind === 146 /* MethodSignature */ ||
-                            node.parent.kind === 156 /* FunctionType */ ||
-                            node.parent.kind === 157 /* ConstructorType */ ||
-                            node.parent.kind === 151 /* CallSignature */ ||
-                            node.parent.kind === 152 /* ConstructSignature */);
-                        emitType(node.constraint);
-                    }
-                    else {
-                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
-                    }
-                }
-                function getTypeParameterConstraintVisibilityError(symbolAccessibilityResult) {
-                    // Type parameter constraints are named by user so we should always be able to name it
-                    var diagnosticMessage;
-                    switch (node.parent.kind) {
-                        case 221 /* ClassDeclaration */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
-                            break;
-                        case 222 /* InterfaceDeclaration */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 152 /* ConstructSignature */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 151 /* CallSignature */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                            if (node.parent.flags & 32 /* Static */) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
-                            }
-                            break;
-                        case 220 /* FunctionDeclaration */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                            break;
-                        default:
-                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.name
-                    };
-                }
-            }
-            if (typeParameters) {
-                write("<");
-                emitCommaList(typeParameters, emitTypeParameter);
-                write(">");
-            }
-        }
-        function emitHeritageClause(typeReferences, isImplementsList) {
-            if (typeReferences) {
-                write(isImplementsList ? " implements " : " extends ");
-                emitCommaList(typeReferences, emitTypeOfTypeReference);
-            }
-            function emitTypeOfTypeReference(node) {
-                if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
-                }
-                else if (!isImplementsList && node.expression.kind === 93 /* NullKeyword */) {
-                    write("null");
-                }
-                else {
-                    writer.getSymbolAccessibilityDiagnostic = getHeritageClauseVisibilityError;
-                    resolver.writeBaseConstructorTypeOfClass(enclosingDeclaration, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
-                }
-                function getHeritageClauseVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage;
-                    // Heritage clause is written by user so it can always be named
-                    if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
-                        // Class or Interface implemented/extended is inaccessible
-                        diagnosticMessage = isImplementsList ?
-                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
-                            ts.Diagnostics.Extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        // interface is inaccessible
-                        diagnosticMessage = ts.Diagnostics.Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.parent.parent.name
-                    };
-                }
-            }
-        }
-        function writeClassDeclaration(node) {
-            function emitParameterProperties(constructorDeclaration) {
-                if (constructorDeclaration) {
-                    ts.forEach(constructorDeclaration.parameters, function (param) {
-                        if (param.flags & 92 /* ParameterPropertyModifier */) {
-                            emitPropertyDeclaration(param);
-                        }
-                    });
-                }
-            }
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (node.flags & 128 /* Abstract */) {
-                write("abstract ");
-            }
-            write("class ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                emitHeritageClause([baseTypeNode], /*isImplementsList*/ false);
-            }
-            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), /*isImplementsList*/ true);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitParameterProperties(ts.getFirstConstructorWithBody(node));
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function writeInterfaceDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("interface ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            emitHeritageClause(ts.getInterfaceBaseTypeNodes(node), /*isImplementsList*/ false);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function emitPropertyDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            emitJsDocComments(node);
-            emitClassMemberDeclarationFlags(node.flags);
-            emitVariableDeclaration(node);
-            write(";");
-            writeLine();
-        }
-        function emitVariableDeclaration(node) {
-            // If we are emitting property it isn't moduleElement and hence we already know it needs to be emitted
-            // so there is no check needed to see if declaration is visible
-            if (node.kind !== 218 /* VariableDeclaration */ || resolver.isDeclarationVisible(node)) {
-                if (ts.isBindingPattern(node.name)) {
-                    emitBindingPattern(node.name);
-                }
-                else {
-                    // If this node is a computed name, it can only be a symbol, because we've already skipped
-                    // it if it's not a well known symbol. In that case, the text of the name will be exactly
-                    // what we want, namely the name expression enclosed in brackets.
-                    writeTextOfNode(currentText, node.name);
-                    // If optional property emit ?
-                    if ((node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */ || node.kind === 142 /* Parameter */) && ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                    if ((node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */) && node.parent.kind === 159 /* TypeLiteral */) {
-                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
-                    }
-                    else if (!(node.flags & 8 /* Private */)) {
-                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                if (node.kind === 218 /* VariableDeclaration */) {
-                    return symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
-                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
-                }
-                else if (node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */) {
-                    // TODO(jfreeman): Deal with computed properties in error reporting.
-                    if (node.flags & 32 /* Static */) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        // Interfaces cannot have types that cannot be named
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
-            }
-            function emitBindingPattern(bindingPattern) {
-                // Only select non-omitted expression from the bindingPattern's elements.
-                // We have to do this to avoid emitting trailing commas.
-                // For example:
-                //      original: var [, c,,] = [ 2,3,4]
-                //      emitted: declare var c: number; // instead of declare var c:number, ;
-                var elements = [];
-                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (element.kind !== 193 /* OmittedExpression */) {
-                        elements.push(element);
-                    }
-                }
-                emitCommaList(elements, emitBindingElement);
-            }
-            function emitBindingElement(bindingElement) {
-                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                    return diagnosticMessage !== undefined ? {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: bindingElement,
-                        typeName: bindingElement.name
-                    } : undefined;
-                }
-                if (bindingElement.name) {
-                    if (ts.isBindingPattern(bindingElement.name)) {
-                        emitBindingPattern(bindingElement.name);
-                    }
-                    else {
-                        writeTextOfNode(currentText, bindingElement.name);
-                        writeTypeOfDeclaration(bindingElement, /*type*/ undefined, getBindingElementTypeVisibilityError);
-                    }
-                }
-            }
-        }
-        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
-            // if this is property of type literal,
-            // or is parameter of method/call/construct/index signature of type literal
-            // emit only if type is specified
-            if (node.type) {
-                write(": ");
-                emitType(node.type);
-            }
-        }
-        function isVariableStatementVisible(node) {
-            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
-        }
-        function writeVariableStatement(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isLet(node.declarationList)) {
-                write("let ");
-            }
-            else if (ts.isConst(node.declarationList)) {
-                write("const ");
-            }
-            else {
-                write("var ");
-            }
-            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
-            write(";");
-            writeLine();
-        }
-        function emitAccessorDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-            var accessorWithTypeAnnotation;
-            if (node === accessors.firstAccessor) {
-                emitJsDocComments(accessors.getAccessor);
-                emitJsDocComments(accessors.setAccessor);
-                emitClassMemberDeclarationFlags(node.flags | (accessors.setAccessor ? 0 : 64 /* Readonly */));
-                writeTextOfNode(currentText, node.name);
-                if (!(node.flags & 8 /* Private */)) {
-                    accessorWithTypeAnnotation = node;
-                    var type = getTypeAnnotationFromAccessor(node);
-                    if (!type) {
-                        // couldn't get type for the first accessor, try the another one
-                        var anotherAccessor = node.kind === 149 /* GetAccessor */ ? accessors.setAccessor : accessors.getAccessor;
-                        type = getTypeAnnotationFromAccessor(anotherAccessor);
-                        if (type) {
-                            accessorWithTypeAnnotation = anotherAccessor;
-                        }
-                    }
-                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
-                }
-                write(";");
-                writeLine();
-            }
-            function getTypeAnnotationFromAccessor(accessor) {
-                if (accessor) {
-                    return accessor.kind === 149 /* GetAccessor */
-                        ? accessor.type // Getter - return type
-                        : accessor.parameters.length > 0
-                            ? accessor.parameters[0].type // Setter parameter type
-                            : undefined;
-                }
-            }
-            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                if (accessorWithTypeAnnotation.kind === 150 /* SetAccessor */) {
-                    // Setters have to have type named and cannot infer it so, the type should always be named
-                    if (accessorWithTypeAnnotation.parent.flags & 32 /* Static */) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.parameters[0],
-                        // TODO(jfreeman): Investigate why we are passing node.name instead of node.parameters[0].name
-                        typeName: accessorWithTypeAnnotation.name
-                    };
-                }
-                else {
-                    if (accessorWithTypeAnnotation.flags & 32 /* Static */) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
-                    }
-                    else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.name,
-                        typeName: undefined
-                    };
-                }
-            }
-        }
-        function writeFunctionDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            // If we are emitting Method/Constructor it isn't moduleElement and hence already determined to be emitting
-            // so no need to verify if the declaration is visible
-            if (!resolver.isImplementationOfOverload(node)) {
-                emitJsDocComments(node);
-                if (node.kind === 220 /* FunctionDeclaration */) {
-                    emitModuleElementDeclarationFlags(node);
-                }
-                else if (node.kind === 147 /* MethodDeclaration */ || node.kind === 148 /* Constructor */) {
-                    emitClassMemberDeclarationFlags(node.flags);
-                }
-                if (node.kind === 220 /* FunctionDeclaration */) {
-                    write("function ");
-                    writeTextOfNode(currentText, node.name);
-                }
-                else if (node.kind === 148 /* Constructor */) {
-                    write("constructor");
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                    if (ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                }
-                emitSignatureDeclaration(node);
-            }
-        }
-        function emitSignatureDeclarationWithJsDocComments(node) {
-            emitJsDocComments(node);
-            emitSignatureDeclaration(node);
-        }
-        function emitSignatureDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            var closeParenthesizedFunctionType = false;
-            if (node.kind === 153 /* IndexSignature */) {
-                // Index signature can have readonly modifier
-                emitClassMemberDeclarationFlags(node.flags);
-                write("[");
-            }
-            else {
-                // Construct signature or constructor type write new Signature
-                if (node.kind === 152 /* ConstructSignature */ || node.kind === 157 /* ConstructorType */) {
-                    write("new ");
-                }
-                else if (node.kind === 156 /* FunctionType */) {
-                    var currentOutput = writer.getText();
-                    // Do not generate incorrect type when function type with type parameters is type argument
-                    // This could happen if user used space between two '<' making it error free
-                    // e.g var x: A< <Tany>(a: Tany)=>Tany>;
-                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
-                        closeParenthesizedFunctionType = true;
-                        write("(");
-                    }
-                }
-                emitTypeParameters(node.typeParameters);
-                write("(");
-            }
-            // Parameters
-            emitCommaList(node.parameters, emitParameterDeclaration);
-            if (node.kind === 153 /* IndexSignature */) {
-                write("]");
-            }
-            else {
-                write(")");
-            }
-            // If this is not a constructor and is not private, emit the return type
-            var isFunctionTypeOrConstructorType = node.kind === 156 /* FunctionType */ || node.kind === 157 /* ConstructorType */;
-            if (isFunctionTypeOrConstructorType || node.parent.kind === 159 /* TypeLiteral */) {
-                // Emit type literal signature return type only if specified
-                if (node.type) {
-                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
-                    emitType(node.type);
-                }
-            }
-            else if (node.kind !== 148 /* Constructor */ && !(node.flags & 8 /* Private */)) {
-                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
-            }
-            enclosingDeclaration = prevEnclosingDeclaration;
-            if (!isFunctionTypeOrConstructorType) {
-                write(";");
-                writeLine();
-            }
-            else if (closeParenthesizedFunctionType) {
-                write(")");
-            }
-            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                switch (node.kind) {
-                    case 152 /* ConstructSignature */:
-                        // Interfaces cannot have return types that cannot be named
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 151 /* CallSignature */:
-                        // Interfaces cannot have return types that cannot be named
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 153 /* IndexSignature */:
-                        // Interfaces cannot have return types that cannot be named
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (node.flags & 32 /* Static */) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
-                        }
-                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
-                        }
-                        else {
-                            // Interfaces cannot have return types that cannot be named
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
-                        }
-                        break;
-                    case 220 /* FunctionDeclaration */:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
-                        break;
-                    default:
-                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
-                }
-                return {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node.name || node
-                };
-            }
-        }
-        function emitParameterDeclaration(node) {
-            increaseIndent();
-            emitJsDocComments(node);
-            if (node.dotDotDotToken) {
-                write("...");
-            }
-            if (ts.isBindingPattern(node.name)) {
-                // For bindingPattern, we can't simply writeTextOfNode from the source file
-                // because we want to omit the initializer and using writeTextOfNode will result in initializer get emitted.
-                // Therefore, we will have to recursively emit each element in the bindingPattern.
-                emitBindingPattern(node.name);
-            }
-            else {
-                writeTextOfNode(currentText, node.name);
-            }
-            if (resolver.isOptionalParameter(node)) {
-                write("?");
-            }
-            decreaseIndent();
-            if (node.parent.kind === 156 /* FunctionType */ ||
-                node.parent.kind === 157 /* ConstructorType */ ||
-                node.parent.parent.kind === 159 /* TypeLiteral */) {
-                emitTypeOfVariableDeclarationFromTypeLiteral(node);
-            }
-            else if (!(node.parent.flags & 8 /* Private */)) {
-                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
-            }
-            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
-            }
-            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                switch (node.parent.kind) {
-                    case 148 /* Constructor */:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
-                    case 152 /* ConstructSignature */:
-                        // Interfaces cannot have parameter types that cannot be named
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 151 /* CallSignature */:
-                        // Interfaces cannot have parameter types that cannot be named
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (node.parent.flags & 32 /* Static */) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else {
-                            // Interfaces cannot have parameter types that cannot be named
-                            return symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
-                        }
-                    case 220 /* FunctionDeclaration */:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                    default:
-                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
-                }
-            }
-            function emitBindingPattern(bindingPattern) {
-                // We have to explicitly emit square bracket and bracket because these tokens are not store inside the node.
-                if (bindingPattern.kind === 167 /* ObjectBindingPattern */) {
-                    write("{");
-                    emitCommaList(bindingPattern.elements, emitBindingElement);
-                    write("}");
-                }
-                else if (bindingPattern.kind === 168 /* ArrayBindingPattern */) {
-                    write("[");
-                    var elements = bindingPattern.elements;
-                    emitCommaList(elements, emitBindingElement);
-                    if (elements && elements.hasTrailingComma) {
-                        write(", ");
-                    }
-                    write("]");
-                }
-            }
-            function emitBindingElement(bindingElement) {
-                if (bindingElement.kind === 193 /* OmittedExpression */) {
-                    // If bindingElement is an omittedExpression (i.e. containing elision),
-                    // we will emit blank space (although this may differ from users' original code,
-                    // it allows emitSeparatedList to write separator appropriately)
-                    // Example:
-                    //      original: function foo([, x, ,]) {}
-                    //      emit    : function foo([ , x,  , ]) {}
-                    write(" ");
-                }
-                else if (bindingElement.kind === 169 /* BindingElement */) {
-                    if (bindingElement.propertyName) {
-                        // bindingElement has propertyName property in the following case:
-                        //      { y: [a,b,c] ...} -> bindingPattern will have a property called propertyName for "y"
-                        // We have to explicitly emit the propertyName before descending into its binding elements.
-                        // Example:
-                        //      original: function foo({y: [a,b,c]}) {}
-                        //      emit    : declare function foo({y: [a, b, c]}: { y: [any, any, any] }) void;
-                        writeTextOfNode(currentText, bindingElement.propertyName);
-                        write(": ");
-                    }
-                    if (bindingElement.name) {
-                        if (ts.isBindingPattern(bindingElement.name)) {
-                            // If it is a nested binding pattern, we will recursively descend into each element and emit each one separately.
-                            // In the case of rest element, we will omit rest element.
-                            // Example:
-                            //      original: function foo([a, [[b]], c] = [1,[["string"]], 3]) {}
-                            //      emit    : declare function foo([a, [[b]], c]: [number, [[string]], number]): void;
-                            //      original with rest: function foo([a, ...c]) {}
-                            //      emit              : declare function foo([a, ...c]): void;
-                            emitBindingPattern(bindingElement.name);
-                        }
-                        else {
-                            ts.Debug.assert(bindingElement.name.kind === 69 /* Identifier */);
-                            // If the node is just an identifier, we will simply emit the text associated with the node's name
-                            // Example:
-                            //      original: function foo({y = 10, x}) {}
-                            //      emit    : declare function foo({y, x}: {number, any}): void;
-                            if (bindingElement.dotDotDotToken) {
-                                write("...");
-                            }
-                            writeTextOfNode(currentText, bindingElement.name);
-                        }
-                    }
-                }
-            }
-        }
-        function emitNode(node) {
-            switch (node.kind) {
-                case 220 /* FunctionDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                case 229 /* ImportEqualsDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 221 /* ClassDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 224 /* EnumDeclaration */:
-                    return emitModuleElement(node, isModuleElementVisible(node));
-                case 200 /* VariableStatement */:
-                    return emitModuleElement(node, isVariableStatementVisible(node));
-                case 230 /* ImportDeclaration */:
-                    // Import declaration without import clause is visible, otherwise it is not visible
-                    return emitModuleElement(node, /*isModuleElementVisible*/ !node.importClause);
-                case 236 /* ExportDeclaration */:
-                    return emitExportDeclaration(node);
-                case 148 /* Constructor */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    return writeFunctionDeclaration(node);
-                case 152 /* ConstructSignature */:
-                case 151 /* CallSignature */:
-                case 153 /* IndexSignature */:
-                    return emitSignatureDeclarationWithJsDocComments(node);
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return emitAccessorDeclaration(node);
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    return emitPropertyDeclaration(node);
-                case 255 /* EnumMember */:
-                    return emitEnumMemberDeclaration(node);
-                case 235 /* ExportAssignment */:
-                    return emitExportAssignment(node);
-                case 256 /* SourceFile */:
-                    return emitSourceFile(node);
-            }
-        }
-        /**
-         * Adds the reference to referenced file, returns true if global file reference was emitted
-         * @param referencedFile
-         * @param addBundledFileReference Determines if global file reference corresponding to bundled file should be emitted or not
-         */
-        function writeReferencePath(referencedFile, addBundledFileReference) {
-            var declFileName;
-            var addedBundledEmitReference = false;
-            if (ts.isDeclarationFile(referencedFile)) {
-                // Declaration file, use declaration file name
-                declFileName = referencedFile.fileName;
-            }
-            else {
-                // Get the declaration file path
-                ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile);
-            }
-            if (declFileName) {
-                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
-                /*isAbsolutePathAnUrl*/ false);
-                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
-            }
-            return addedBundledEmitReference;
-            function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) {
-                // Dont add reference path to this file if it is a bundled emit and caller asked not emit bundled file path
-                if (isBundledEmit && !addBundledFileReference) {
-                    return;
-                }
-                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
-                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
-                addedBundledEmitReference = isBundledEmit;
-            }
-        }
-    }
-    /* @internal */
-    function writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) {
-        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit);
-        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
-        if (!emitSkipped) {
-            var declarationOutput = emitDeclarationResult.referencesOutput
-                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
-            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
-        }
-        return emitSkipped;
-        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
-            var appliedSyncOutputPos = 0;
-            var declarationOutput = "";
-            // apply asynchronous additions to the synchronous output
-            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                if (aliasEmitInfo.asynchronousOutput) {
-                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
-                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
-                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
-                }
-            });
-            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
-            return declarationOutput;
-        }
-    }
-    ts.writeDeclarationFile = writeDeclarationFile;
-})(ts || (ts = {}));
-/// <reference path="checker.ts"/>
-/// <reference path="sourcemap.ts" />
-/// <reference path="declarationEmitter.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    function getResolvedExternalModuleName(host, file) {
-        return file.moduleName || ts.getExternalModuleNameFromPath(host, file.fileName);
-    }
-    ts.getResolvedExternalModuleName = getResolvedExternalModuleName;
-    function getExternalModuleNameFromDeclaration(host, resolver, declaration) {
-        var file = resolver.getExternalModuleFileFromDeclaration(declaration);
-        if (!file || ts.isDeclarationFile(file)) {
-            return undefined;
-        }
-        return getResolvedExternalModuleName(host, file);
-    }
-    ts.getExternalModuleNameFromDeclaration = getExternalModuleNameFromDeclaration;
-    var Jump;
-    (function (Jump) {
-        Jump[Jump["Break"] = 2] = "Break";
-        Jump[Jump["Continue"] = 4] = "Continue";
-        Jump[Jump["Return"] = 8] = "Return";
-    })(Jump || (Jump = {}));
-    var entities = {
-        "quot": 0x0022,
-        "amp": 0x0026,
-        "apos": 0x0027,
-        "lt": 0x003C,
-        "gt": 0x003E,
-        "nbsp": 0x00A0,
-        "iexcl": 0x00A1,
-        "cent": 0x00A2,
-        "pound": 0x00A3,
-        "curren": 0x00A4,
-        "yen": 0x00A5,
-        "brvbar": 0x00A6,
-        "sect": 0x00A7,
-        "uml": 0x00A8,
-        "copy": 0x00A9,
-        "ordf": 0x00AA,
-        "laquo": 0x00AB,
-        "not": 0x00AC,
-        "shy": 0x00AD,
-        "reg": 0x00AE,
-        "macr": 0x00AF,
-        "deg": 0x00B0,
-        "plusmn": 0x00B1,
-        "sup2": 0x00B2,
-        "sup3": 0x00B3,
-        "acute": 0x00B4,
-        "micro": 0x00B5,
-        "para": 0x00B6,
-        "middot": 0x00B7,
-        "cedil": 0x00B8,
-        "sup1": 0x00B9,
-        "ordm": 0x00BA,
-        "raquo": 0x00BB,
-        "frac14": 0x00BC,
-        "frac12": 0x00BD,
-        "frac34": 0x00BE,
-        "iquest": 0x00BF,
-        "Agrave": 0x00C0,
-        "Aacute": 0x00C1,
-        "Acirc": 0x00C2,
-        "Atilde": 0x00C3,
-        "Auml": 0x00C4,
-        "Aring": 0x00C5,
-        "AElig": 0x00C6,
-        "Ccedil": 0x00C7,
-        "Egrave": 0x00C8,
-        "Eacute": 0x00C9,
-        "Ecirc": 0x00CA,
-        "Euml": 0x00CB,
-        "Igrave": 0x00CC,
-        "Iacute": 0x00CD,
-        "Icirc": 0x00CE,
-        "Iuml": 0x00CF,
-        "ETH": 0x00D0,
-        "Ntilde": 0x00D1,
-        "Ograve": 0x00D2,
-        "Oacute": 0x00D3,
-        "Ocirc": 0x00D4,
-        "Otilde": 0x00D5,
-        "Ouml": 0x00D6,
-        "times": 0x00D7,
-        "Oslash": 0x00D8,
-        "Ugrave": 0x00D9,
-        "Uacute": 0x00DA,
-        "Ucirc": 0x00DB,
-        "Uuml": 0x00DC,
-        "Yacute": 0x00DD,
-        "THORN": 0x00DE,
-        "szlig": 0x00DF,
-        "agrave": 0x00E0,
-        "aacute": 0x00E1,
-        "acirc": 0x00E2,
-        "atilde": 0x00E3,
-        "auml": 0x00E4,
-        "aring": 0x00E5,
-        "aelig": 0x00E6,
-        "ccedil": 0x00E7,
-        "egrave": 0x00E8,
-        "eacute": 0x00E9,
-        "ecirc": 0x00EA,
-        "euml": 0x00EB,
-        "igrave": 0x00EC,
-        "iacute": 0x00ED,
-        "icirc": 0x00EE,
-        "iuml": 0x00EF,
-        "eth": 0x00F0,
-        "ntilde": 0x00F1,
-        "ograve": 0x00F2,
-        "oacute": 0x00F3,
-        "ocirc": 0x00F4,
-        "otilde": 0x00F5,
-        "ouml": 0x00F6,
-        "divide": 0x00F7,
-        "oslash": 0x00F8,
-        "ugrave": 0x00F9,
-        "uacute": 0x00FA,
-        "ucirc": 0x00FB,
-        "uuml": 0x00FC,
-        "yacute": 0x00FD,
-        "thorn": 0x00FE,
-        "yuml": 0x00FF,
-        "OElig": 0x0152,
-        "oelig": 0x0153,
-        "Scaron": 0x0160,
-        "scaron": 0x0161,
-        "Yuml": 0x0178,
-        "fnof": 0x0192,
-        "circ": 0x02C6,
-        "tilde": 0x02DC,
-        "Alpha": 0x0391,
-        "Beta": 0x0392,
-        "Gamma": 0x0393,
-        "Delta": 0x0394,
-        "Epsilon": 0x0395,
-        "Zeta": 0x0396,
-        "Eta": 0x0397,
-        "Theta": 0x0398,
-        "Iota": 0x0399,
-        "Kappa": 0x039A,
-        "Lambda": 0x039B,
-        "Mu": 0x039C,
-        "Nu": 0x039D,
-        "Xi": 0x039E,
-        "Omicron": 0x039F,
-        "Pi": 0x03A0,
-        "Rho": 0x03A1,
-        "Sigma": 0x03A3,
-        "Tau": 0x03A4,
-        "Upsilon": 0x03A5,
-        "Phi": 0x03A6,
-        "Chi": 0x03A7,
-        "Psi": 0x03A8,
-        "Omega": 0x03A9,
-        "alpha": 0x03B1,
-        "beta": 0x03B2,
-        "gamma": 0x03B3,
-        "delta": 0x03B4,
-        "epsilon": 0x03B5,
-        "zeta": 0x03B6,
-        "eta": 0x03B7,
-        "theta": 0x03B8,
-        "iota": 0x03B9,
-        "kappa": 0x03BA,
-        "lambda": 0x03BB,
-        "mu": 0x03BC,
-        "nu": 0x03BD,
-        "xi": 0x03BE,
-        "omicron": 0x03BF,
-        "pi": 0x03C0,
-        "rho": 0x03C1,
-        "sigmaf": 0x03C2,
-        "sigma": 0x03C3,
-        "tau": 0x03C4,
-        "upsilon": 0x03C5,
-        "phi": 0x03C6,
-        "chi": 0x03C7,
-        "psi": 0x03C8,
-        "omega": 0x03C9,
-        "thetasym": 0x03D1,
-        "upsih": 0x03D2,
-        "piv": 0x03D6,
-        "ensp": 0x2002,
-        "emsp": 0x2003,
-        "thinsp": 0x2009,
-        "zwnj": 0x200C,
-        "zwj": 0x200D,
-        "lrm": 0x200E,
-        "rlm": 0x200F,
-        "ndash": 0x2013,
-        "mdash": 0x2014,
-        "lsquo": 0x2018,
-        "rsquo": 0x2019,
-        "sbquo": 0x201A,
-        "ldquo": 0x201C,
-        "rdquo": 0x201D,
-        "bdquo": 0x201E,
-        "dagger": 0x2020,
-        "Dagger": 0x2021,
-        "bull": 0x2022,
-        "hellip": 0x2026,
-        "permil": 0x2030,
-        "prime": 0x2032,
-        "Prime": 0x2033,
-        "lsaquo": 0x2039,
-        "rsaquo": 0x203A,
-        "oline": 0x203E,
-        "frasl": 0x2044,
-        "euro": 0x20AC,
-        "image": 0x2111,
-        "weierp": 0x2118,
-        "real": 0x211C,
-        "trade": 0x2122,
-        "alefsym": 0x2135,
-        "larr": 0x2190,
-        "uarr": 0x2191,
-        "rarr": 0x2192,
-        "darr": 0x2193,
-        "harr": 0x2194,
-        "crarr": 0x21B5,
-        "lArr": 0x21D0,
-        "uArr": 0x21D1,
-        "rArr": 0x21D2,
-        "dArr": 0x21D3,
-        "hArr": 0x21D4,
-        "forall": 0x2200,
-        "part": 0x2202,
-        "exist": 0x2203,
-        "empty": 0x2205,
-        "nabla": 0x2207,
-        "isin": 0x2208,
-        "notin": 0x2209,
-        "ni": 0x220B,
-        "prod": 0x220F,
-        "sum": 0x2211,
-        "minus": 0x2212,
-        "lowast": 0x2217,
-        "radic": 0x221A,
-        "prop": 0x221D,
-        "infin": 0x221E,
-        "ang": 0x2220,
-        "and": 0x2227,
-        "or": 0x2228,
-        "cap": 0x2229,
-        "cup": 0x222A,
-        "int": 0x222B,
-        "there4": 0x2234,
-        "sim": 0x223C,
-        "cong": 0x2245,
-        "asymp": 0x2248,
-        "ne": 0x2260,
-        "equiv": 0x2261,
-        "le": 0x2264,
-        "ge": 0x2265,
-        "sub": 0x2282,
-        "sup": 0x2283,
-        "nsub": 0x2284,
-        "sube": 0x2286,
-        "supe": 0x2287,
-        "oplus": 0x2295,
-        "otimes": 0x2297,
-        "perp": 0x22A5,
-        "sdot": 0x22C5,
-        "lceil": 0x2308,
-        "rceil": 0x2309,
-        "lfloor": 0x230A,
-        "rfloor": 0x230B,
-        "lang": 0x2329,
-        "rang": 0x232A,
-        "loz": 0x25CA,
-        "spades": 0x2660,
-        "clubs": 0x2663,
-        "hearts": 0x2665,
-        "diams": 0x2666
-    };
-    // Flags enum to track count of temp variables and a few dedicated names
-    var TempFlags;
-    (function (TempFlags) {
-        TempFlags[TempFlags["Auto"] = 0] = "Auto";
-        TempFlags[TempFlags["CountMask"] = 268435455] = "CountMask";
-        TempFlags[TempFlags["_i"] = 268435456] = "_i";
-    })(TempFlags || (TempFlags = {}));
-    var CopyDirection;
-    (function (CopyDirection) {
-        CopyDirection[CopyDirection["ToOriginal"] = 0] = "ToOriginal";
-        CopyDirection[CopyDirection["ToOutParameter"] = 1] = "ToOutParameter";
-    })(CopyDirection || (CopyDirection = {}));
-    // targetSourceFile is when users only want one file in entire project to be emitted. This is used in compileOnSave feature
-    function emitFiles(resolver, host, targetSourceFile) {
-        // emit output for the __extends helper function
-        var extendsHelper = "\nvar __extends = (this && this.__extends) || function (d, b) {\n    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n    function __() { this.constructor = d; }\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n};";
-        var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n    for (var s, i = 1, n = arguments.length; i < n; i++) {\n        s = arguments[i];\n        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n            t[p] = s[p];\n    }\n    return t;\n};";
-        // emit output for the __decorate helper function
-        var decorateHelper = "\nvar __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\n};";
-        // emit output for the __metadata helper function
-        var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};";
-        // emit output for the __param helper function
-        var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n    return function (target, key) { decorator(target, key, paramIndex); }\n};";
-        var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n    return new (P || (P = Promise))(function (resolve, reject) {\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n        step((generator = generator.apply(thisArg, _arguments)).next());\n    });\n};";
-        var compilerOptions = host.getCompilerOptions();
-        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
-        var modulekind = ts.getEmitModuleKind(compilerOptions);
-        var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
-        var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined;
-        var emitterDiagnostics = ts.createDiagnosticCollection();
-        var emitSkipped = false;
-        var newLine = host.getNewLine();
-        var emitJavaScript = createFileEmitter();
-        ts.forEachExpectedEmitFile(host, emitFile, targetSourceFile);
-        return {
-            emitSkipped: emitSkipped,
-            diagnostics: emitterDiagnostics.getDiagnostics(),
-            emittedFiles: emittedFilesList,
-            sourceMaps: sourceMapDataList
-        };
-        function isUniqueLocalName(name, container) {
-            for (var node = container; ts.isNodeDescendentOf(node, container); node = node.nextContainer) {
-                if (node.locals && ts.hasProperty(node.locals, name)) {
-                    // We conservatively include alias symbols to cover cases where they're emitted as locals
-                    if (node.locals[name].flags & (107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        function setLabeledJump(state, isBreak, labelText, labelMarker) {
-            if (isBreak) {
-                if (!state.labeledNonLocalBreaks) {
-                    state.labeledNonLocalBreaks = {};
-                }
-                state.labeledNonLocalBreaks[labelText] = labelMarker;
-            }
-            else {
-                if (!state.labeledNonLocalContinues) {
-                    state.labeledNonLocalContinues = {};
-                }
-                state.labeledNonLocalContinues[labelText] = labelMarker;
-            }
-        }
-        function hoistVariableDeclarationFromLoop(state, declaration) {
-            if (!state.hoistedLocalVariables) {
-                state.hoistedLocalVariables = [];
-            }
-            visit(declaration.name);
-            function visit(node) {
-                if (node.kind === 69 /* Identifier */) {
-                    state.hoistedLocalVariables.push(node);
-                }
-                else {
-                    for (var _a = 0, _b = node.elements; _a < _b.length; _a++) {
-                        var element = _b[_a];
-                        visit(element.name);
-                    }
-                }
-            }
-        }
-        function createFileEmitter() {
-            var writer = ts.createTextWriter(newLine);
-            var write = writer.write, writeTextOfNode = writer.writeTextOfNode, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent;
-            var sourceMap = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? ts.createSourceMapWriter(host, writer) : ts.getNullSourceMapWriter();
-            var setSourceFile = sourceMap.setSourceFile, emitStart = sourceMap.emitStart, emitEnd = sourceMap.emitEnd, emitPos = sourceMap.emitPos;
-            var currentSourceFile;
-            var currentText;
-            var currentLineMap;
-            var currentFileIdentifiers;
-            var renamedDependencies;
-            var isEs6Module;
-            var isCurrentFileExternalModule;
-            // name of an exporter function if file is a System external module
-            // System.register([...], function (<exporter>) {...})
-            // exporting in System modules looks like:
-            // export var x; ... x = 1
-            // =>
-            // var x;... exporter("x", x = 1)
-            var exportFunctionForFile;
-            var contextObjectForFile;
-            var generatedNameSet;
-            var nodeToGeneratedName;
-            var computedPropertyNamesToGeneratedNames;
-            var decoratedClassAliases;
-            var convertedLoopState;
-            var extendsEmitted;
-            var assignEmitted;
-            var decorateEmitted;
-            var paramEmitted;
-            var awaiterEmitted;
-            var tempFlags = 0;
-            var tempVariables;
-            var tempParameters;
-            var externalImports;
-            var exportSpecifiers;
-            var exportEquals;
-            var hasExportStarsToExportValues;
-            var detachedCommentsInfo;
-            /** Sourcemap data that will get encoded */
-            var sourceMapData;
-            /** Is the file being emitted into its own file */
-            var isOwnFileEmit;
-            /** If removeComments is true, no leading-comments needed to be emitted **/
-            var emitLeadingCommentsOfPosition = compilerOptions.removeComments ? function (pos) { } : emitLeadingCommentsOfPositionWorker;
-            var setSourceMapWriterEmit = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? changeSourceMapEmit : function (writer) { };
-            var moduleEmitDelegates = (_a = {},
-                _a[ts.ModuleKind.ES6] = emitES6Module,
-                _a[ts.ModuleKind.AMD] = emitAMDModule,
-                _a[ts.ModuleKind.System] = emitSystemModule,
-                _a[ts.ModuleKind.UMD] = emitUMDModule,
-                _a[ts.ModuleKind.CommonJS] = emitCommonJSModule,
-                _a
-            );
-            var bundleEmitDelegates = (_b = {},
-                _b[ts.ModuleKind.ES6] = function () { },
-                _b[ts.ModuleKind.AMD] = emitAMDModule,
-                _b[ts.ModuleKind.System] = emitSystemModule,
-                _b[ts.ModuleKind.UMD] = function () { },
-                _b[ts.ModuleKind.CommonJS] = function () { },
-                _b
-            );
-            return doEmit;
-            function doEmit(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
-                sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
-                generatedNameSet = {};
-                nodeToGeneratedName = [];
-                decoratedClassAliases = [];
-                isOwnFileEmit = !isBundledEmit;
-                // Emit helpers from all the files
-                if (isBundledEmit && modulekind) {
-                    ts.forEach(sourceFiles, emitEmitHelpers);
-                }
-                // Do not call emit directly. It does not set the currentSourceFile.
-                ts.forEach(sourceFiles, emitSourceFile);
-                writeLine();
-                var sourceMappingURL = sourceMap.getSourceMappingURL();
-                if (sourceMappingURL) {
-                    write("//# sourceMappingURL=" + sourceMappingURL);
-                }
-                writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, /*writeByteOrderMark*/ compilerOptions.emitBOM, sourceFiles);
-                // reset the state
-                sourceMap.reset();
-                writer.reset();
-                currentSourceFile = undefined;
-                currentText = undefined;
-                currentLineMap = undefined;
-                exportFunctionForFile = undefined;
-                contextObjectForFile = undefined;
-                generatedNameSet = undefined;
-                nodeToGeneratedName = undefined;
-                decoratedClassAliases = undefined;
-                computedPropertyNamesToGeneratedNames = undefined;
-                convertedLoopState = undefined;
-                extendsEmitted = false;
-                decorateEmitted = false;
-                paramEmitted = false;
-                awaiterEmitted = false;
-                assignEmitted = false;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = undefined;
-                detachedCommentsInfo = undefined;
-                sourceMapData = undefined;
-                isEs6Module = false;
-                renamedDependencies = undefined;
-                isCurrentFileExternalModule = false;
-            }
-            function emitSourceFile(sourceFile) {
-                currentSourceFile = sourceFile;
-                currentText = sourceFile.text;
-                currentLineMap = ts.getLineStarts(sourceFile);
-                exportFunctionForFile = undefined;
-                contextObjectForFile = undefined;
-                isEs6Module = sourceFile.symbol && sourceFile.symbol.exports && !!sourceFile.symbol.exports["___esModule"];
-                renamedDependencies = sourceFile.renamedDependencies;
-                currentFileIdentifiers = sourceFile.identifiers;
-                isCurrentFileExternalModule = ts.isExternalModule(sourceFile);
-                setSourceFile(sourceFile);
-                emitNodeWithCommentsAndWithoutSourcemap(sourceFile);
-            }
-            function isUniqueName(name) {
-                return !resolver.hasGlobalName(name) &&
-                    !ts.hasProperty(currentFileIdentifiers, name) &&
-                    !ts.hasProperty(generatedNameSet, name);
-            }
-            // Return the next available name in the pattern _a ... _z, _0, _1, ...
-            // TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
-            // Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
-            function makeTempVariableName(flags) {
-                if (flags && !(tempFlags & flags)) {
-                    var name_23 = flags === 268435456 /* _i */ ? "_i" : "_n";
-                    if (isUniqueName(name_23)) {
-                        tempFlags |= flags;
-                        return name_23;
-                    }
-                }
-                while (true) {
-                    var count = tempFlags & 268435455 /* CountMask */;
-                    tempFlags++;
-                    // Skip over 'i' and 'n'
-                    if (count !== 8 && count !== 13) {
-                        var name_24 = count < 26 ? "_" + String.fromCharCode(97 /* a */ + count) : "_" + (count - 26);
-                        if (isUniqueName(name_24)) {
-                            return name_24;
-                        }
-                    }
-                }
-            }
-            // Generate a name that is unique within the current file and doesn't conflict with any names
-            // in global scope. The name is formed by adding an '_n' suffix to the specified base name,
-            // where n is a positive integer. Note that names generated by makeTempVariableName and
-            // makeUniqueName are guaranteed to never conflict.
-            function makeUniqueName(baseName) {
-                // Find the first unique 'name_n', where n is a positive number
-                if (baseName.charCodeAt(baseName.length - 1) !== 95 /* _ */) {
-                    baseName += "_";
-                }
-                var i = 1;
-                while (true) {
-                    var generatedName = baseName + i;
-                    if (isUniqueName(generatedName)) {
-                        return generatedNameSet[generatedName] = generatedName;
-                    }
-                    i++;
-                }
-            }
-            function generateNameForModuleOrEnum(node) {
-                var name = node.name.text;
-                // Use module/enum name itself if it is unique, otherwise make a unique variation
-                return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
-            }
-            function generateNameForImportOrExportDeclaration(node) {
-                var expr = ts.getExternalModuleName(node);
-                var baseName = expr.kind === 9 /* StringLiteral */ ?
-                    ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module";
-                return makeUniqueName(baseName);
-            }
-            function generateNameForExportDefault() {
-                return makeUniqueName("default");
-            }
-            function generateNameForClassExpression() {
-                return makeUniqueName("class");
-            }
-            function generateNameForNode(node) {
-                switch (node.kind) {
-                    case 69 /* Identifier */:
-                        return makeUniqueName(node.text);
-                    case 225 /* ModuleDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                        return generateNameForModuleOrEnum(node);
-                    case 230 /* ImportDeclaration */:
-                    case 236 /* ExportDeclaration */:
-                        return generateNameForImportOrExportDeclaration(node);
-                    case 220 /* FunctionDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 235 /* ExportAssignment */:
-                        return generateNameForExportDefault();
-                    case 192 /* ClassExpression */:
-                        return generateNameForClassExpression();
-                }
-            }
-            function getGeneratedNameForNode(node) {
-                var id = ts.getNodeId(node);
-                return nodeToGeneratedName[id] || (nodeToGeneratedName[id] = ts.unescapeIdentifier(generateNameForNode(node)));
-            }
-            /** Write emitted output to disk */
-            function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) {
-                if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
-                    ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false, sourceFiles);
-                }
-                if (sourceMapDataList) {
-                    sourceMapDataList.push(sourceMap.getSourceMapData());
-                }
-                ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles);
-            }
-            // Create a temporary variable with a unique unused name.
-            function createTempVariable(flags) {
-                var result = ts.createSynthesizedNode(69 /* Identifier */);
-                result.text = makeTempVariableName(flags);
-                return result;
-            }
-            function recordTempDeclaration(name) {
-                if (!tempVariables) {
-                    tempVariables = [];
-                }
-                tempVariables.push(name);
-            }
-            function createAndRecordTempVariable(flags) {
-                var temp = createTempVariable(flags);
-                recordTempDeclaration(temp);
-                return temp;
-            }
-            function emitTempDeclarations(newLine) {
-                if (tempVariables) {
-                    if (newLine) {
-                        writeLine();
-                    }
-                    else {
-                        write(" ");
-                    }
-                    write("var ");
-                    emitCommaList(tempVariables);
-                    write(";");
-                }
-            }
-            /** Emit the text for the given token that comes after startPos
-              * This by default writes the text provided with the given tokenKind
-              * but if optional emitFn callback is provided the text is emitted using the callback instead of default text
-              * @param tokenKind the kind of the token to search and emit
-              * @param startPos the position in the source to start searching for the token
-              * @param emitFn if given will be invoked to emit the text instead of actual token emit */
-            function emitToken(tokenKind, startPos, emitFn) {
-                var tokenStartPos = ts.skipTrivia(currentText, startPos);
-                emitPos(tokenStartPos);
-                var tokenString = ts.tokenToString(tokenKind);
-                if (emitFn) {
-                    emitFn();
-                }
-                else {
-                    write(tokenString);
-                }
-                var tokenEndPos = tokenStartPos + tokenString.length;
-                emitPos(tokenEndPos);
-                return tokenEndPos;
-            }
-            function emitOptional(prefix, node) {
-                if (node) {
-                    write(prefix);
-                    emit(node);
-                }
-            }
-            function emitParenthesizedIf(node, parenthesized) {
-                if (parenthesized) {
-                    write("(");
-                }
-                emit(node);
-                if (parenthesized) {
-                    write(")");
-                }
-            }
-            function emitLinePreservingList(parent, nodes, allowTrailingComma, spacesBetweenBraces) {
-                ts.Debug.assert(nodes.length > 0);
-                increaseIndent();
-                if (nodeStartPositionsAreOnSameLine(parent, nodes[0])) {
-                    if (spacesBetweenBraces) {
-                        write(" ");
-                    }
-                }
-                else {
-                    writeLine();
-                }
-                for (var i = 0, n = nodes.length; i < n; i++) {
-                    if (i) {
-                        if (nodeEndIsOnSameLineAsNodeStart(nodes[i - 1], nodes[i])) {
-                            write(", ");
-                        }
-                        else {
-                            write(",");
-                            writeLine();
-                        }
-                    }
-                    emit(nodes[i]);
-                }
-                if (nodes.hasTrailingComma && allowTrailingComma) {
-                    write(",");
-                }
-                decreaseIndent();
-                if (nodeEndPositionsAreOnSameLine(parent, ts.lastOrUndefined(nodes))) {
-                    if (spacesBetweenBraces) {
-                        write(" ");
-                    }
-                }
-                else {
-                    writeLine();
-                }
-            }
-            function emitList(nodes, start, count, multiLine, trailingComma, leadingComma, noTrailingNewLine, emitNode) {
-                if (!emitNode) {
-                    emitNode = emit;
-                }
-                for (var i = 0; i < count; i++) {
-                    if (multiLine) {
-                        if (i || leadingComma) {
-                            write(",");
-                        }
-                        writeLine();
-                    }
-                    else {
-                        if (i || leadingComma) {
-                            write(", ");
-                        }
-                    }
-                    var node = nodes[start + i];
-                    // This emitting is to make sure we emit following comment properly
-                    //   ...(x, /*comment1*/ y)...
-                    //         ^ => node.pos
-                    // "comment1" is not considered leading comment for "y" but rather
-                    // considered as trailing comment of the previous node.
-                    emitTrailingCommentsOfPosition(node.pos);
-                    emitNode(node);
-                    leadingComma = true;
-                }
-                if (trailingComma) {
-                    write(",");
-                }
-                if (multiLine && !noTrailingNewLine) {
-                    writeLine();
-                }
-                return count;
-            }
-            function emitCommaList(nodes) {
-                if (nodes) {
-                    emitList(nodes, 0, nodes.length, /*multiLine*/ false, /*trailingComma*/ false);
-                }
-            }
-            function emitLines(nodes) {
-                emitLinesStartingAt(nodes, /*startIndex*/ 0);
-            }
-            function emitLinesStartingAt(nodes, startIndex) {
-                for (var i = startIndex; i < nodes.length; i++) {
-                    writeLine();
-                    emit(nodes[i]);
-                }
-            }
-            function isBinaryOrOctalIntegerLiteral(node, text) {
-                if (node.kind === 8 /* NumericLiteral */ && text.length > 1) {
-                    switch (text.charCodeAt(1)) {
-                        case 98 /* b */:
-                        case 66 /* B */:
-                        case 111 /* o */:
-                        case 79 /* O */:
-                            return true;
-                    }
-                }
-                return false;
-            }
-            function emitLiteral(node) {
-                var text = getLiteralText(node);
-                if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap) && (node.kind === 9 /* StringLiteral */ || ts.isTemplateLiteralKind(node.kind))) {
-                    writer.writeLiteral(text);
-                }
-                else if (languageVersion < 2 /* ES6 */ && isBinaryOrOctalIntegerLiteral(node, text)) {
-                    write(node.text);
-                }
-                else {
-                    write(text);
-                }
-            }
-            function getLiteralText(node) {
-                // Any template literal or string literal with an extended escape
-                // (e.g. "\u{0067}") will need to be downleveled as a escaped string literal.
-                if (languageVersion < 2 /* ES6 */ && (ts.isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) {
-                    return getQuotedEscapedLiteralText('"', node.text, '"');
-                }
-                // If we don't need to downlevel and we can reach the original source text using
-                // the node's parent reference, then simply get the text as it was originally written.
-                if (node.parent) {
-                    return ts.getTextOfNodeFromSourceText(currentText, node);
-                }
-                // If we can't reach the original source text, use the canonical form if it's a number,
-                // or an escaped quoted form of the original text if it's string-like.
-                switch (node.kind) {
-                    case 9 /* StringLiteral */:
-                        return getQuotedEscapedLiteralText('"', node.text, '"');
-                    case 11 /* NoSubstitutionTemplateLiteral */:
-                        return getQuotedEscapedLiteralText("`", node.text, "`");
-                    case 12 /* TemplateHead */:
-                        return getQuotedEscapedLiteralText("`", node.text, "${");
-                    case 13 /* TemplateMiddle */:
-                        return getQuotedEscapedLiteralText("}", node.text, "${");
-                    case 14 /* TemplateTail */:
-                        return getQuotedEscapedLiteralText("}", node.text, "`");
-                    case 8 /* NumericLiteral */:
-                        return node.text;
-                }
-                ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
-            }
-            function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) {
-                return leftQuote + ts.escapeNonAsciiCharacters(ts.escapeString(text)) + rightQuote;
-            }
-            function emitDownlevelRawTemplateLiteral(node) {
-                // Find original source text, since we need to emit the raw strings of the tagged template.
-                // The raw strings contain the (escaped) strings of what the user wrote.
-                // Examples: `\n` is converted to "\\n", a template string with a newline to "\n".
-                var text = ts.getTextOfNodeFromSourceText(currentText, node);
-                // text contains the original source, it will also contain quotes ("`"), dollar signs and braces ("${" and "}"),
-                // thus we need to remove those characters.
-                // First template piece starts with "`", others with "}"
-                // Last template piece ends with "`", others with "${"
-                var isLast = node.kind === 11 /* NoSubstitutionTemplateLiteral */ || node.kind === 14 /* TemplateTail */;
-                text = text.substring(1, text.length - (isLast ? 1 : 2));
-                // Newline normalization:
-                // ES6 Spec 11.8.6.1 - Static Semantics of TV's and TRV's
-                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for both TV and TRV.
-                text = text.replace(/\r\n?/g, "\n");
-                text = ts.escapeString(text);
-                write("\"" + text + "\"");
-            }
-            function emitDownlevelTaggedTemplateArray(node, literalEmitter) {
-                write("[");
-                if (node.template.kind === 11 /* NoSubstitutionTemplateLiteral */) {
-                    literalEmitter(node.template);
-                }
-                else {
-                    literalEmitter(node.template.head);
-                    ts.forEach(node.template.templateSpans, function (child) {
-                        write(", ");
-                        literalEmitter(child.literal);
-                    });
-                }
-                write("]");
-            }
-            function emitDownlevelTaggedTemplate(node) {
-                var tempVariable = createAndRecordTempVariable(0 /* Auto */);
-                write("(");
-                emit(tempVariable);
-                write(" = ");
-                emitDownlevelTaggedTemplateArray(node, emit);
-                write(", ");
-                emit(tempVariable);
-                write(".raw = ");
-                emitDownlevelTaggedTemplateArray(node, emitDownlevelRawTemplateLiteral);
-                write(", ");
-                emitParenthesizedIf(node.tag, needsParenthesisForPropertyAccessOrInvocation(node.tag));
-                write("(");
-                emit(tempVariable);
-                // Now we emit the expressions
-                if (node.template.kind === 189 /* TemplateExpression */) {
-                    ts.forEach(node.template.templateSpans, function (templateSpan) {
-                        write(", ");
-                        var needsParens = templateSpan.expression.kind === 187 /* BinaryExpression */
-                            && templateSpan.expression.operatorToken.kind === 24 /* CommaToken */;
-                        emitParenthesizedIf(templateSpan.expression, needsParens);
-                    });
-                }
-                write("))");
-            }
-            function emitTemplateExpression(node) {
-                // In ES6 mode and above, we can simply emit each portion of a template in order, but in
-                // ES3 & ES5 we must convert the template expression into a series of string concatenations.
-                if (languageVersion >= 2 /* ES6 */) {
-                    ts.forEachChild(node, emit);
-                    return;
-                }
-                var emitOuterParens = ts.isExpression(node.parent)
-                    && templateNeedsParens(node, node.parent);
-                if (emitOuterParens) {
-                    write("(");
-                }
-                var headEmitted = false;
-                if (shouldEmitTemplateHead()) {
-                    emitLiteral(node.head);
-                    headEmitted = true;
-                }
-                for (var i = 0, n = node.templateSpans.length; i < n; i++) {
-                    var templateSpan = node.templateSpans[i];
-                    // Check if the expression has operands and binds its operands less closely than binary '+'.
-                    // If it does, we need to wrap the expression in parentheses. Otherwise, something like
-                    //    `abc${ 1 << 2 }`
-                    // becomes
-                    //    "abc" + 1 << 2 + ""
-                    // which is really
-                    //    ("abc" + 1) << (2 + "")
-                    // rather than
-                    //    "abc" + (1 << 2) + ""
-                    var needsParens = templateSpan.expression.kind !== 178 /* ParenthesizedExpression */
-                        && comparePrecedenceToBinaryPlus(templateSpan.expression) !== 1 /* GreaterThan */;
-                    if (i > 0 || headEmitted) {
-                        // If this is the first span and the head was not emitted, then this templateSpan's
-                        // expression will be the first to be emitted. Don't emit the preceding ' + ' in that
-                        // case.
-                        write(" + ");
-                    }
-                    emitParenthesizedIf(templateSpan.expression, needsParens);
-                    // Only emit if the literal is non-empty.
-                    // The binary '+' operator is left-associative, so the first string concatenation
-                    // with the head will force the result up to this point to be a string.
-                    // Emitting a '+ ""' has no semantic effect for middles and tails.
-                    if (templateSpan.literal.text.length !== 0) {
-                        write(" + ");
-                        emitLiteral(templateSpan.literal);
-                    }
-                }
-                if (emitOuterParens) {
-                    write(")");
-                }
-                function shouldEmitTemplateHead() {
-                    // If this expression has an empty head literal and the first template span has a non-empty
-                    // literal, then emitting the empty head literal is not necessary.
-                    //     `${ foo } and ${ bar }`
-                    // can be emitted as
-                    //     foo + " and " + bar
-                    // This is because it is only required that one of the first two operands in the emit
-                    // output must be a string literal, so that the other operand and all following operands
-                    // are forced into strings.
-                    //
-                    // If the first template span has an empty literal, then the head must still be emitted.
-                    //     `${ foo }${ bar }`
-                    // must still be emitted as
-                    //     "" + foo + bar
-                    // There is always atleast one templateSpan in this code path, since
-                    // NoSubstitutionTemplateLiterals are directly emitted via emitLiteral()
-                    ts.Debug.assert(node.templateSpans.length !== 0);
-                    return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0;
-                }
-                function templateNeedsParens(template, parent) {
-                    switch (parent.kind) {
-                        case 174 /* CallExpression */:
-                        case 175 /* NewExpression */:
-                            return parent.expression === template;
-                        case 176 /* TaggedTemplateExpression */:
-                        case 178 /* ParenthesizedExpression */:
-                            return false;
-                        default:
-                            return comparePrecedenceToBinaryPlus(parent) !== -1 /* LessThan */;
-                    }
-                }
-                /**
-                 * Returns whether the expression has lesser, greater,
-                 * or equal precedence to the binary '+' operator
-                 */
-                function comparePrecedenceToBinaryPlus(expression) {
-                    // All binary expressions have lower precedence than '+' apart from '*', '/', and '%'
-                    // which have greater precedence and '-' which has equal precedence.
-                    // All unary operators have a higher precedence apart from yield.
-                    // Arrow functions and conditionals have a lower precedence,
-                    // although we convert the former into regular function expressions in ES5 mode,
-                    // and in ES6 mode this function won't get called anyway.
-                    //
-                    // TODO (drosen): Note that we need to account for the upcoming 'yield' and
-                    //                spread ('...') unary operators that are anticipated for ES6.
-                    switch (expression.kind) {
-                        case 187 /* BinaryExpression */:
-                            switch (expression.operatorToken.kind) {
-                                case 37 /* AsteriskToken */:
-                                case 39 /* SlashToken */:
-                                case 40 /* PercentToken */:
-                                    return 1 /* GreaterThan */;
-                                case 35 /* PlusToken */:
-                                case 36 /* MinusToken */:
-                                    return 0 /* EqualTo */;
-                                default:
-                                    return -1 /* LessThan */;
-                            }
-                        case 190 /* YieldExpression */:
-                        case 188 /* ConditionalExpression */:
-                            return -1 /* LessThan */;
-                        default:
-                            return 1 /* GreaterThan */;
-                    }
-                }
-            }
-            function emitTemplateSpan(span) {
-                emit(span.expression);
-                emit(span.literal);
-            }
-            function jsxEmitReact(node) {
-                /// Emit a tag name, which is either '"div"' for lower-cased names, or
-                /// 'Div' for upper-cased or dotted names
-                function emitTagName(name) {
-                    if (name.kind === 69 /* Identifier */ && ts.isIntrinsicJsxName(name.text)) {
-                        write('"');
-                        emit(name);
-                        write('"');
-                    }
-                    else {
-                        emit(name);
-                    }
-                }
-                /// Emit an attribute name, which is quoted if it needs to be quoted. Because
-                /// these emit into an object literal property name, we don't need to be worried
-                /// about keywords, just non-identifier characters
-                function emitAttributeName(name) {
-                    if (/^[A-Za-z_]\w*$/.test(name.text)) {
-                        emit(name);
-                    }
-                    else {
-                        write('"');
-                        emit(name);
-                        write('"');
-                    }
-                }
-                /// Emit an name/value pair for an attribute (e.g. "x: 3")
-                function emitJsxAttribute(node) {
-                    emitAttributeName(node.name);
-                    write(": ");
-                    if (node.initializer) {
-                        emit(node.initializer);
-                    }
-                    else {
-                        write("true");
-                    }
-                }
-                function emitJsxElement(openingNode, children) {
-                    var syntheticReactRef = ts.createSynthesizedNode(69 /* Identifier */);
-                    syntheticReactRef.text = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
-                    syntheticReactRef.parent = openingNode;
-                    // Call React.createElement(tag, ...
-                    emitLeadingComments(openingNode);
-                    emitExpressionIdentifier(syntheticReactRef);
-                    write(".createElement(");
-                    emitTagName(openingNode.tagName);
-                    write(", ");
-                    // Attribute list
-                    if (openingNode.attributes.length === 0) {
-                        // When there are no attributes, React wants "null"
-                        write("null");
-                    }
-                    else {
-                        // Either emit one big object literal (no spread attribs), or
-                        // a call to the __assign helper
-                        var attrs = openingNode.attributes;
-                        if (ts.forEach(attrs, function (attr) { return attr.kind === 247 /* JsxSpreadAttribute */; })) {
-                            write("__assign(");
-                            var haveOpenedObjectLiteral = false;
-                            for (var i = 0; i < attrs.length; i++) {
-                                if (attrs[i].kind === 247 /* JsxSpreadAttribute */) {
-                                    // If this is the first argument, we need to emit a {} as the first argument
-                                    if (i === 0) {
-                                        write("{}, ");
-                                    }
-                                    if (haveOpenedObjectLiteral) {
-                                        write("}");
-                                        haveOpenedObjectLiteral = false;
-                                    }
-                                    if (i > 0) {
-                                        write(", ");
-                                    }
-                                    emit(attrs[i].expression);
-                                }
-                                else {
-                                    ts.Debug.assert(attrs[i].kind === 246 /* JsxAttribute */);
-                                    if (haveOpenedObjectLiteral) {
-                                        write(", ");
-                                    }
-                                    else {
-                                        haveOpenedObjectLiteral = true;
-                                        if (i > 0) {
-                                            write(", ");
-                                        }
-                                        write("{");
-                                    }
-                                    emitJsxAttribute(attrs[i]);
-                                }
-                            }
-                            if (haveOpenedObjectLiteral)
-                                write("}");
-                            write(")"); // closing paren to React.__spread(
-                        }
-                        else {
-                            // One object literal with all the attributes in them
-                            write("{");
-                            for (var i = 0, n = attrs.length; i < n; i++) {
-                                if (i > 0) {
-                                    write(", ");
-                                }
-                                emitJsxAttribute(attrs[i]);
-                            }
-                            write("}");
-                        }
-                    }
-                    // Children
-                    if (children) {
-                        var firstChild = void 0;
-                        var multipleEmittableChildren = false;
-                        for (var i = 0, n = children.length; i < n; i++) {
-                            var jsxChild = children[i];
-                            if (isJsxChildEmittable(jsxChild)) {
-                                // we need to decide whether to emit in single line or multiple lines as indented list
-                                // store firstChild reference, if we see another emittable child, then emit accordingly
-                                if (!firstChild) {
-                                    write(", ");
-                                    firstChild = jsxChild;
-                                }
-                                else {
-                                    // more than one emittable child, emit indented list
-                                    if (!multipleEmittableChildren) {
-                                        multipleEmittableChildren = true;
-                                        increaseIndent();
-                                        writeLine();
-                                        emit(firstChild);
-                                    }
-                                    write(", ");
-                                    writeLine();
-                                    emit(jsxChild);
-                                }
-                            }
-                        }
-                        if (multipleEmittableChildren) {
-                            decreaseIndent();
-                        }
-                        else if (firstChild) {
-                            if (firstChild.kind !== 241 /* JsxElement */ && firstChild.kind !== 242 /* JsxSelfClosingElement */) {
-                                emit(firstChild);
-                            }
-                            else {
-                                // If the only child is jsx element, put it on a new indented line
-                                increaseIndent();
-                                writeLine();
-                                emit(firstChild);
-                                writeLine();
-                                decreaseIndent();
-                            }
-                        }
-                    }
-                    // Closing paren
-                    write(")"); // closes "React.createElement("
-                    emitTrailingComments(openingNode);
-                }
-                if (node.kind === 241 /* JsxElement */) {
-                    emitJsxElement(node.openingElement, node.children);
-                }
-                else {
-                    ts.Debug.assert(node.kind === 242 /* JsxSelfClosingElement */);
-                    emitJsxElement(node);
-                }
-            }
-            function jsxEmitPreserve(node) {
-                function emitJsxAttribute(node) {
-                    emit(node.name);
-                    if (node.initializer) {
-                        write("=");
-                        emit(node.initializer);
-                    }
-                }
-                function emitJsxSpreadAttribute(node) {
-                    write("{...");
-                    emit(node.expression);
-                    write("}");
-                }
-                function emitAttributes(attribs) {
-                    for (var i = 0, n = attribs.length; i < n; i++) {
-                        if (i > 0) {
-                            write(" ");
-                        }
-                        if (attribs[i].kind === 247 /* JsxSpreadAttribute */) {
-                            emitJsxSpreadAttribute(attribs[i]);
-                        }
-                        else {
-                            ts.Debug.assert(attribs[i].kind === 246 /* JsxAttribute */);
-                            emitJsxAttribute(attribs[i]);
-                        }
-                    }
-                }
-                function emitJsxOpeningOrSelfClosingElement(node) {
-                    write("<");
-                    emit(node.tagName);
-                    if (node.attributes.length > 0 || (node.kind === 242 /* JsxSelfClosingElement */)) {
-                        write(" ");
-                    }
-                    emitAttributes(node.attributes);
-                    if (node.kind === 242 /* JsxSelfClosingElement */) {
-                        write("/>");
-                    }
-                    else {
-                        write(">");
-                    }
-                }
-                function emitJsxClosingElement(node) {
-                    write("</");
-                    emit(node.tagName);
-                    write(">");
-                }
-                function emitJsxElement(node) {
-                    emitJsxOpeningOrSelfClosingElement(node.openingElement);
-                    for (var i = 0, n = node.children.length; i < n; i++) {
-                        emit(node.children[i]);
-                    }
-                    emitJsxClosingElement(node.closingElement);
-                }
-                if (node.kind === 241 /* JsxElement */) {
-                    emitJsxElement(node);
-                }
-                else {
-                    ts.Debug.assert(node.kind === 242 /* JsxSelfClosingElement */);
-                    emitJsxOpeningOrSelfClosingElement(node);
-                }
-            }
-            // This function specifically handles numeric/string literals for enum and accessor 'identifiers'.
-            // In a sense, it does not actually emit identifiers as much as it declares a name for a specific property.
-            // For example, this is utilized when feeding in a result to Object.defineProperty.
-            function emitExpressionForPropertyName(node) {
-                ts.Debug.assert(node.kind !== 169 /* BindingElement */);
-                if (node.kind === 9 /* StringLiteral */) {
-                    emitLiteral(node);
-                }
-                else if (node.kind === 140 /* ComputedPropertyName */) {
-                    // if this is a decorated computed property, we will need to capture the result
-                    // of the property expression so that we can apply decorators later. This is to ensure
-                    // we don't introduce unintended side effects:
-                    //
-                    //   class C {
-                    //     [_a = x]() { }
-                    //   }
-                    //
-                    // The emit for the decorated computed property decorator is:
-                    //
-                    //   __decorate([dec], C.prototype, _a, Object.getOwnPropertyDescriptor(C.prototype, _a));
-                    //
-                    if (ts.nodeIsDecorated(node.parent)) {
-                        if (!computedPropertyNamesToGeneratedNames) {
-                            computedPropertyNamesToGeneratedNames = [];
-                        }
-                        var generatedName = computedPropertyNamesToGeneratedNames[ts.getNodeId(node)];
-                        if (generatedName) {
-                            // we have already generated a variable for this node, write that value instead.
-                            write(generatedName);
-                            return;
-                        }
-                        generatedName = createAndRecordTempVariable(0 /* Auto */).text;
-                        computedPropertyNamesToGeneratedNames[ts.getNodeId(node)] = generatedName;
-                        write(generatedName);
-                        write(" = ");
-                    }
-                    emit(node.expression);
-                }
-                else {
-                    write('"');
-                    if (node.kind === 8 /* NumericLiteral */) {
-                        write(node.text);
-                    }
-                    else {
-                        writeTextOfNode(currentText, node);
-                    }
-                    write('"');
-                }
-            }
-            function isExpressionIdentifier(node) {
-                var parent = node.parent;
-                switch (parent.kind) {
-                    case 170 /* ArrayLiteralExpression */:
-                    case 195 /* AsExpression */:
-                    case 184 /* AwaitExpression */:
-                    case 187 /* BinaryExpression */:
-                    case 174 /* CallExpression */:
-                    case 249 /* CaseClause */:
-                    case 140 /* ComputedPropertyName */:
-                    case 188 /* ConditionalExpression */:
-                    case 143 /* Decorator */:
-                    case 181 /* DeleteExpression */:
-                    case 204 /* DoStatement */:
-                    case 173 /* ElementAccessExpression */:
-                    case 235 /* ExportAssignment */:
-                    case 202 /* ExpressionStatement */:
-                    case 194 /* ExpressionWithTypeArguments */:
-                    case 206 /* ForStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 203 /* IfStatement */:
-                    case 245 /* JsxClosingElement */:
-                    case 242 /* JsxSelfClosingElement */:
-                    case 243 /* JsxOpeningElement */:
-                    case 247 /* JsxSpreadAttribute */:
-                    case 248 /* JsxExpression */:
-                    case 175 /* NewExpression */:
-                    case 196 /* NonNullExpression */:
-                    case 178 /* ParenthesizedExpression */:
-                    case 186 /* PostfixUnaryExpression */:
-                    case 185 /* PrefixUnaryExpression */:
-                    case 211 /* ReturnStatement */:
-                    case 254 /* ShorthandPropertyAssignment */:
-                    case 191 /* SpreadElementExpression */:
-                    case 213 /* SwitchStatement */:
-                    case 176 /* TaggedTemplateExpression */:
-                    case 197 /* TemplateSpan */:
-                    case 215 /* ThrowStatement */:
-                    case 177 /* TypeAssertionExpression */:
-                    case 182 /* TypeOfExpression */:
-                    case 183 /* VoidExpression */:
-                    case 205 /* WhileStatement */:
-                    case 212 /* WithStatement */:
-                    case 190 /* YieldExpression */:
-                        return true;
-                    case 169 /* BindingElement */:
-                    case 255 /* EnumMember */:
-                    case 142 /* Parameter */:
-                    case 253 /* PropertyAssignment */:
-                    case 145 /* PropertyDeclaration */:
-                    case 218 /* VariableDeclaration */:
-                        return parent.initializer === node;
-                    case 172 /* PropertyAccessExpression */:
-                        return parent.expression === node;
-                    case 180 /* ArrowFunction */:
-                    case 179 /* FunctionExpression */:
-                        return parent.body === node;
-                    case 229 /* ImportEqualsDeclaration */:
-                        return parent.moduleReference === node;
-                    case 139 /* QualifiedName */:
-                        return parent.left === node;
-                }
-                return false;
-            }
-            function emitExpressionIdentifier(node) {
-                var container = resolver.getReferencedExportContainer(node);
-                if (container) {
-                    if (container.kind === 256 /* SourceFile */) {
-                        // Identifier references module export
-                        if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
-                            write("exports.");
-                        }
-                    }
-                    else {
-                        // Identifier references namespace export
-                        write(getGeneratedNameForNode(container));
-                        write(".");
-                    }
-                }
-                else {
-                    if (modulekind !== ts.ModuleKind.ES6) {
-                        var declaration = resolver.getReferencedImportDeclaration(node);
-                        if (declaration) {
-                            if (declaration.kind === 231 /* ImportClause */) {
-                                // Identifier references default import
-                                write(getGeneratedNameForNode(declaration.parent));
-                                write(languageVersion === 0 /* ES3 */ ? '["default"]' : ".default");
-                                return;
-                            }
-                            else if (declaration.kind === 234 /* ImportSpecifier */) {
-                                // Identifier references named import
-                                write(getGeneratedNameForNode(declaration.parent.parent.parent));
-                                var name_25 = declaration.propertyName || declaration.name;
-                                var identifier = ts.getTextOfNodeFromSourceText(currentText, name_25);
-                                if (languageVersion === 0 /* ES3 */ && identifier === "default") {
-                                    write('["default"]');
-                                }
-                                else {
-                                    write(".");
-                                    write(identifier);
-                                }
-                                return;
-                            }
-                        }
-                    }
-                    if (languageVersion < 2 /* ES6 */) {
-                        var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
-                        if (declaration) {
-                            write(getGeneratedNameForNode(declaration.name));
-                            return;
-                        }
-                    }
-                    else if (resolver.getNodeCheckFlags(node) & 1048576 /* BodyScopedClassBinding */) {
-                        // Due to the emit for class decorators, any reference to the class from inside of the class body
-                        // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
-                        // behavior of class names in ES6.
-                        var declaration = resolver.getReferencedValueDeclaration(node);
-                        if (declaration) {
-                            var classAlias = decoratedClassAliases[ts.getNodeId(declaration)];
-                            if (classAlias !== undefined) {
-                                write(classAlias);
-                                return;
-                            }
-                        }
-                    }
-                }
-                if (ts.nodeIsSynthesized(node)) {
-                    write(node.text);
-                }
-                else {
-                    writeTextOfNode(currentText, node);
-                }
-            }
-            function isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node) {
-                if (languageVersion < 2 /* ES6 */) {
-                    var parent_13 = node.parent;
-                    switch (parent_13.kind) {
-                        case 169 /* BindingElement */:
-                        case 221 /* ClassDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                        case 218 /* VariableDeclaration */:
-                            return parent_13.name === node && resolver.isDeclarationWithCollidingName(parent_13);
-                    }
-                }
-                return false;
-            }
-            function emitIdentifier(node) {
-                if (convertedLoopState) {
-                    if (node.text == "arguments" && resolver.isArgumentsLocalBinding(node)) {
-                        // in converted loop body arguments cannot be used directly.
-                        var name_26 = convertedLoopState.argumentsName || (convertedLoopState.argumentsName = makeUniqueName("arguments"));
-                        write(name_26);
-                        return;
-                    }
-                }
-                if (!node.parent) {
-                    write(node.text);
-                }
-                else if (isExpressionIdentifier(node)) {
-                    emitExpressionIdentifier(node);
-                }
-                else if (isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node)) {
-                    write(getGeneratedNameForNode(node));
-                }
-                else if (ts.nodeIsSynthesized(node)) {
-                    write(node.text);
-                }
-                else {
-                    writeTextOfNode(currentText, node);
-                }
-            }
-            function emitThis(node) {
-                if (resolver.getNodeCheckFlags(node) & 2 /* LexicalThis */) {
-                    write("_this");
-                }
-                else if (convertedLoopState) {
-                    write(convertedLoopState.thisName || (convertedLoopState.thisName = makeUniqueName("this")));
-                }
-                else {
-                    write("this");
-                }
-            }
-            function emitSuper(node) {
-                if (languageVersion >= 2 /* ES6 */) {
-                    write("super");
-                }
-                else {
-                    var flags = resolver.getNodeCheckFlags(node);
-                    if (flags & 256 /* SuperInstance */) {
-                        write("_super.prototype");
-                    }
-                    else {
-                        write("_super");
-                    }
-                }
-            }
-            function emitObjectBindingPattern(node) {
-                write("{ ");
-                var elements = node.elements;
-                emitList(elements, 0, elements.length, /*multiLine*/ false, /*trailingComma*/ elements.hasTrailingComma);
-                write(" }");
-            }
-            function emitArrayBindingPattern(node) {
-                write("[");
-                var elements = node.elements;
-                emitList(elements, 0, elements.length, /*multiLine*/ false, /*trailingComma*/ elements.hasTrailingComma);
-                write("]");
-            }
-            function emitBindingElement(node) {
-                if (node.propertyName) {
-                    emit(node.propertyName);
-                    write(": ");
-                }
-                if (node.dotDotDotToken) {
-                    write("...");
-                }
-                if (ts.isBindingPattern(node.name)) {
-                    emit(node.name);
-                }
-                else {
-                    emitModuleMemberName(node);
-                }
-                emitOptional(" = ", node.initializer);
-            }
-            function emitSpreadElementExpression(node) {
-                write("...");
-                emit(node.expression);
-            }
-            function emitYieldExpression(node) {
-                write(ts.tokenToString(114 /* YieldKeyword */));
-                if (node.asteriskToken) {
-                    write("*");
-                }
-                if (node.expression) {
-                    write(" ");
-                    emit(node.expression);
-                }
-            }
-            function emitAwaitExpression(node) {
-                var needsParenthesis = needsParenthesisForAwaitExpressionAsYield(node);
-                if (needsParenthesis) {
-                    write("(");
-                }
-                write(ts.tokenToString(114 /* YieldKeyword */));
-                write(" ");
-                emit(node.expression);
-                if (needsParenthesis) {
-                    write(")");
-                }
-            }
-            function needsParenthesisForAwaitExpressionAsYield(node) {
-                if (node.parent.kind === 187 /* BinaryExpression */ && !ts.isAssignmentOperator(node.parent.operatorToken.kind)) {
-                    return true;
-                }
-                else if (node.parent.kind === 188 /* ConditionalExpression */ && node.parent.condition === node) {
-                    return true;
-                }
-                return false;
-            }
-            function needsParenthesisForPropertyAccessOrInvocation(node) {
-                switch (node.kind) {
-                    case 69 /* Identifier */:
-                    case 170 /* ArrayLiteralExpression */:
-                    case 172 /* PropertyAccessExpression */:
-                    case 173 /* ElementAccessExpression */:
-                    case 174 /* CallExpression */:
-                    case 178 /* ParenthesizedExpression */:
-                        // This list is not exhaustive and only includes those cases that are relevant
-                        // to the check in emitArrayLiteral. More cases can be added as needed.
-                        return false;
-                }
-                return true;
-            }
-            function emitListWithSpread(elements, needsUniqueCopy, multiLine, trailingComma, useConcat) {
-                var pos = 0;
-                var group = 0;
-                var length = elements.length;
-                while (pos < length) {
-                    // Emit using the pattern <group0>.concat(<group1>, <group2>, ...)
-                    if (group === 1 && useConcat) {
-                        write(".concat(");
-                    }
-                    else if (group > 0) {
-                        write(", ");
-                    }
-                    var e = elements[pos];
-                    if (e.kind === 191 /* SpreadElementExpression */) {
-                        e = e.expression;
-                        emitParenthesizedIf(e, /*parenthesized*/ group === 0 && needsParenthesisForPropertyAccessOrInvocation(e));
-                        pos++;
-                        if (pos === length && group === 0 && needsUniqueCopy && e.kind !== 170 /* ArrayLiteralExpression */) {
-                            write(".slice()");
-                        }
-                    }
-                    else {
-                        var i = pos;
-                        while (i < length && elements[i].kind !== 191 /* SpreadElementExpression */) {
-                            i++;
-                        }
-                        write("[");
-                        if (multiLine) {
-                            increaseIndent();
-                        }
-                        emitList(elements, pos, i - pos, multiLine, trailingComma && i === length);
-                        if (multiLine) {
-                            decreaseIndent();
-                        }
-                        write("]");
-                        pos = i;
-                    }
-                    group++;
-                }
-                if (group > 1) {
-                    if (useConcat) {
-                        write(")");
-                    }
-                }
-            }
-            function isSpreadElementExpression(node) {
-                return node.kind === 191 /* SpreadElementExpression */;
-            }
-            function emitArrayLiteral(node) {
-                var elements = node.elements;
-                if (elements.length === 0) {
-                    write("[]");
-                }
-                else if (languageVersion >= 2 /* ES6 */ || !ts.forEach(elements, isSpreadElementExpression)) {
-                    write("[");
-                    emitLinePreservingList(node, node.elements, elements.hasTrailingComma, /*spacesBetweenBraces*/ false);
-                    write("]");
-                }
-                else {
-                    emitListWithSpread(elements, /*needsUniqueCopy*/ true, /*multiLine*/ node.multiLine, 
-                    /*trailingComma*/ elements.hasTrailingComma, /*useConcat*/ true);
-                }
-            }
-            function emitObjectLiteralBody(node, numElements) {
-                if (numElements === 0) {
-                    write("{}");
-                    return;
-                }
-                write("{");
-                if (numElements > 0) {
-                    var properties = node.properties;
-                    // If we are not doing a downlevel transformation for object literals,
-                    // then try to preserve the original shape of the object literal.
-                    // Otherwise just try to preserve the formatting.
-                    if (numElements === properties.length) {
-                        emitLinePreservingList(node, properties, /*allowTrailingComma*/ languageVersion >= 1 /* ES5 */, /*spacesBetweenBraces*/ true);
-                    }
-                    else {
-                        var multiLine = node.multiLine;
-                        if (!multiLine) {
-                            write(" ");
-                        }
-                        else {
-                            increaseIndent();
-                        }
-                        emitList(properties, 0, numElements, /*multiLine*/ multiLine, /*trailingComma*/ false);
-                        if (!multiLine) {
-                            write(" ");
-                        }
-                        else {
-                            decreaseIndent();
-                        }
-                    }
-                }
-                write("}");
-            }
-            function emitDownlevelObjectLiteralWithComputedProperties(node, firstComputedPropertyIndex) {
-                var multiLine = node.multiLine;
-                var properties = node.properties;
-                write("(");
-                if (multiLine) {
-                    increaseIndent();
-                }
-                // For computed properties, we need to create a unique handle to the object
-                // literal so we can modify it without risking internal assignments tainting the object.
-                var tempVar = createAndRecordTempVariable(0 /* Auto */);
-                // Write out the first non-computed properties
-                // (or all properties if none of them are computed),
-                // then emit the rest through indexing on the temp variable.
-                emit(tempVar);
-                write(" = ");
-                emitObjectLiteralBody(node, firstComputedPropertyIndex);
-                for (var i = firstComputedPropertyIndex, n = properties.length; i < n; i++) {
-                    writeComma();
-                    var property = properties[i];
-                    emitStart(property);
-                    if (property.kind === 149 /* GetAccessor */ || property.kind === 150 /* SetAccessor */) {
-                        // TODO (drosen): Reconcile with 'emitMemberFunctions'.
-                        var accessors = ts.getAllAccessorDeclarations(node.properties, property);
-                        if (property !== accessors.firstAccessor) {
-                            continue;
-                        }
-                        write("Object.defineProperty(");
-                        emit(tempVar);
-                        write(", ");
-                        emitStart(property.name);
-                        emitExpressionForPropertyName(property.name);
-                        emitEnd(property.name);
-                        write(", {");
-                        increaseIndent();
-                        if (accessors.getAccessor) {
-                            writeLine();
-                            emitLeadingComments(accessors.getAccessor);
-                            write("get: ");
-                            emitStart(accessors.getAccessor);
-                            write("function ");
-                            emitSignatureAndBody(accessors.getAccessor);
-                            emitEnd(accessors.getAccessor);
-                            emitTrailingComments(accessors.getAccessor);
-                            write(",");
-                        }
-                        if (accessors.setAccessor) {
-                            writeLine();
-                            emitLeadingComments(accessors.setAccessor);
-                            write("set: ");
-                            emitStart(accessors.setAccessor);
-                            write("function ");
-                            emitSignatureAndBody(accessors.setAccessor);
-                            emitEnd(accessors.setAccessor);
-                            emitTrailingComments(accessors.setAccessor);
-                            write(",");
-                        }
-                        writeLine();
-                        write("enumerable: true,");
-                        writeLine();
-                        write("configurable: true");
-                        decreaseIndent();
-                        writeLine();
-                        write("})");
-                        emitEnd(property);
-                    }
-                    else {
-                        emitLeadingComments(property);
-                        emitStart(property.name);
-                        emit(tempVar);
-                        emitMemberAccessForPropertyName(property.name);
-                        emitEnd(property.name);
-                        write(" = ");
-                        if (property.kind === 253 /* PropertyAssignment */) {
-                            emit(property.initializer);
-                        }
-                        else if (property.kind === 254 /* ShorthandPropertyAssignment */) {
-                            emitExpressionIdentifier(property.name);
-                        }
-                        else if (property.kind === 147 /* MethodDeclaration */) {
-                            emitFunctionDeclaration(property);
-                        }
-                        else {
-                            ts.Debug.fail("ObjectLiteralElement type not accounted for: " + property.kind);
-                        }
-                    }
-                    emitEnd(property);
-                }
-                writeComma();
-                emit(tempVar);
-                if (multiLine) {
-                    decreaseIndent();
-                    writeLine();
-                }
-                write(")");
-                function writeComma() {
-                    if (multiLine) {
-                        write(",");
-                        writeLine();
-                    }
-                    else {
-                        write(", ");
-                    }
-                }
-            }
-            function emitObjectLiteral(node) {
-                var properties = node.properties;
-                if (languageVersion < 2 /* ES6 */) {
-                    var numProperties = properties.length;
-                    // Find the first computed property.
-                    // Everything until that point can be emitted as part of the initial object literal.
-                    var numInitialNonComputedProperties = numProperties;
-                    for (var i = 0, n = properties.length; i < n; i++) {
-                        if (properties[i].name.kind === 140 /* ComputedPropertyName */) {
-                            numInitialNonComputedProperties = i;
-                            break;
-                        }
-                    }
-                    var hasComputedProperty = numInitialNonComputedProperties !== properties.length;
-                    if (hasComputedProperty) {
-                        emitDownlevelObjectLiteralWithComputedProperties(node, numInitialNonComputedProperties);
-                        return;
-                    }
-                }
-                // Ordinary case: either the object has no computed properties
-                // or we're compiling with an ES6+ target.
-                emitObjectLiteralBody(node, properties.length);
-            }
-            function createBinaryExpression(left, operator, right, startsOnNewLine) {
-                var result = ts.createSynthesizedNode(187 /* BinaryExpression */, startsOnNewLine);
-                result.operatorToken = ts.createSynthesizedNode(operator);
-                result.left = left;
-                result.right = right;
-                return result;
-            }
-            function createPropertyAccessExpression(expression, name) {
-                var result = ts.createSynthesizedNode(172 /* PropertyAccessExpression */);
-                result.expression = parenthesizeForAccess(expression);
-                result.dotToken = ts.createSynthesizedNode(21 /* DotToken */);
-                result.name = name;
-                return result;
-            }
-            function createElementAccessExpression(expression, argumentExpression) {
-                var result = ts.createSynthesizedNode(173 /* ElementAccessExpression */);
-                result.expression = parenthesizeForAccess(expression);
-                result.argumentExpression = argumentExpression;
-                return result;
-            }
-            function parenthesizeForAccess(expr) {
-                // When diagnosing whether the expression needs parentheses, the decision should be based
-                // on the innermost expression in a chain of nested type assertions.
-                while (expr.kind === 177 /* TypeAssertionExpression */ ||
-                    expr.kind === 195 /* AsExpression */ ||
-                    expr.kind === 196 /* NonNullExpression */) {
-                    expr = expr.expression;
-                }
-                // isLeftHandSideExpression is almost the correct criterion for when it is not necessary
-                // to parenthesize the expression before a dot. The known exceptions are:
-                //
-                //    NewExpression:
-                //       new C.x        -> not the same as (new C).x
-                //    NumberLiteral
-                //       1.x            -> not the same as (1).x
-                //
-                if (ts.isLeftHandSideExpression(expr) &&
-                    expr.kind !== 175 /* NewExpression */ &&
-                    expr.kind !== 8 /* NumericLiteral */) {
-                    return expr;
-                }
-                var node = ts.createSynthesizedNode(178 /* ParenthesizedExpression */);
-                node.expression = expr;
-                return node;
-            }
-            function emitComputedPropertyName(node) {
-                write("[");
-                emitExpressionForPropertyName(node);
-                write("]");
-            }
-            function emitMethod(node) {
-                if (languageVersion >= 2 /* ES6 */ && node.asteriskToken) {
-                    write("*");
-                }
-                emit(node.name);
-                if (languageVersion < 2 /* ES6 */) {
-                    write(": function ");
-                }
-                emitSignatureAndBody(node);
-            }
-            function emitPropertyAssignment(node) {
-                emit(node.name);
-                write(": ");
-                // This is to ensure that we emit comment in the following case:
-                //      For example:
-                //          obj = {
-                //              id: /*comment1*/ ()=>void
-                //          }
-                // "comment1" is not considered to be leading comment for node.initializer
-                // but rather a trailing comment on the previous node.
-                emitTrailingCommentsOfPosition(node.initializer.pos);
-                emit(node.initializer);
-            }
-            // Return true if identifier resolves to an exported member of a namespace
-            function isNamespaceExportReference(node) {
-                var container = resolver.getReferencedExportContainer(node);
-                return container && container.kind !== 256 /* SourceFile */;
-            }
-            // Return true if identifier resolves to an imported identifier
-            function isImportedReference(node) {
-                var declaration = resolver.getReferencedImportDeclaration(node);
-                return declaration && (declaration.kind === 231 /* ImportClause */ || declaration.kind === 234 /* ImportSpecifier */);
-            }
-            function emitShorthandPropertyAssignment(node) {
-                // The name property of a short-hand property assignment is considered an expression position, so here
-                // we manually emit the identifier to avoid rewriting.
-                writeTextOfNode(currentText, node.name);
-                // If emitting pre-ES6 code, or if the name requires rewriting when resolved as an expression identifier,
-                // we emit a normal property assignment. For example:
-                //   module m {
-                //       export let y;
-                //   }
-                //   module m {
-                //       let obj = { y };
-                //   }
-                // Here we need to emit obj = { y : m.y } regardless of the output target.
-                // The same rules apply for imported identifiers when targeting module formats with indirect access to
-                // the imported identifiers. For example, when targeting CommonJS:
-                //
-                //   import {foo} from './foo';
-                //   export const baz = { foo };
-                //
-                // Must be transformed into:
-                //
-                //   const foo_1 = require('./foo');
-                //   exports.baz = { foo: foo_1.foo };
-                //
-                if (languageVersion < 2 /* ES6 */ || (modulekind !== ts.ModuleKind.ES6 && isImportedReference(node.name)) || isNamespaceExportReference(node.name)) {
-                    // Emit identifier as an identifier
-                    write(": ");
-                    emit(node.name);
-                }
-                if (languageVersion >= 2 /* ES6 */ && node.objectAssignmentInitializer) {
-                    write(" = ");
-                    emit(node.objectAssignmentInitializer);
-                }
-            }
-            function tryEmitConstantValue(node) {
-                var constantValue = tryGetConstEnumValue(node);
-                if (constantValue !== undefined) {
-                    write(constantValue.toString());
-                    if (!compilerOptions.removeComments) {
-                        var propertyName = node.kind === 172 /* PropertyAccessExpression */ ? ts.declarationNameToString(node.name) : ts.getTextOfNode(node.argumentExpression);
-                        write(" /* " + propertyName + " */");
-                    }
-                    return true;
-                }
-                return false;
-            }
-            function tryGetConstEnumValue(node) {
-                if (compilerOptions.isolatedModules) {
-                    return undefined;
-                }
-                return node.kind === 172 /* PropertyAccessExpression */ || node.kind === 173 /* ElementAccessExpression */
-                    ? resolver.getConstantValue(node)
-                    : undefined;
-            }
-            // Returns 'true' if the code was actually indented, false otherwise.
-            // If the code is not indented, an optional valueToWriteWhenNotIndenting will be
-            // emitted instead.
-            function indentIfOnDifferentLines(parent, node1, node2, valueToWriteWhenNotIndenting) {
-                var realNodesAreOnDifferentLines = !ts.nodeIsSynthesized(parent) && !nodeEndIsOnSameLineAsNodeStart(node1, node2);
-                // Always use a newline for synthesized code if the synthesizer desires it.
-                var synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2);
-                if (realNodesAreOnDifferentLines || synthesizedNodeIsOnDifferentLine) {
-                    increaseIndent();
-                    writeLine();
-                    return true;
-                }
-                else {
-                    if (valueToWriteWhenNotIndenting) {
-                        write(valueToWriteWhenNotIndenting);
-                    }
-                    return false;
-                }
-            }
-            function emitPropertyAccess(node) {
-                if (tryEmitConstantValue(node)) {
-                    return;
-                }
-                if (languageVersion === 2 /* ES6 */ &&
-                    node.expression.kind === 95 /* SuperKeyword */ &&
-                    isInAsyncMethodWithSuperInES6(node)) {
-                    var name_27 = ts.createSynthesizedNode(9 /* StringLiteral */);
-                    name_27.text = node.name.text;
-                    emitSuperAccessInAsyncMethod(node.expression, name_27);
-                    return;
-                }
-                emit(node.expression);
-                var indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, node.dotToken);
-                // 1 .toString is a valid property access, emit a space after the literal
-                // Also emit a space if expression is a integer const enum value - it will appear in generated code as numeric literal
-                var shouldEmitSpace = false;
-                if (!indentedBeforeDot) {
-                    if (node.expression.kind === 8 /* NumericLiteral */) {
-                        // check if numeric literal was originally written with a dot
-                        var text = ts.getTextOfNodeFromSourceText(currentText, node.expression);
-                        shouldEmitSpace = text.indexOf(ts.tokenToString(21 /* DotToken */)) < 0;
-                    }
-                    else {
-                        // check if constant enum value is integer
-                        var constantValue = tryGetConstEnumValue(node.expression);
-                        // isFinite handles cases when constantValue is undefined
-                        shouldEmitSpace = isFinite(constantValue) && Math.floor(constantValue) === constantValue;
-                    }
-                }
-                if (shouldEmitSpace) {
-                    write(" .");
-                }
-                else {
-                    write(".");
-                }
-                var indentedAfterDot = indentIfOnDifferentLines(node, node.dotToken, node.name);
-                emit(node.name);
-                decreaseIndentIf(indentedBeforeDot, indentedAfterDot);
-            }
-            function emitQualifiedName(node) {
-                emit(node.left);
-                write(".");
-                emit(node.right);
-            }
-            function emitQualifiedNameAsExpression(node, useFallback) {
-                if (node.left.kind === 69 /* Identifier */) {
-                    emitEntityNameAsExpression(node.left, useFallback);
-                }
-                else if (useFallback) {
-                    var temp = createAndRecordTempVariable(0 /* Auto */);
-                    write("(");
-                    emitNodeWithoutSourceMap(temp);
-                    write(" = ");
-                    emitEntityNameAsExpression(node.left, /*useFallback*/ true);
-                    write(") && ");
-                    emitNodeWithoutSourceMap(temp);
-                }
-                else {
-                    emitEntityNameAsExpression(node.left, /*useFallback*/ false);
-                }
-                write(".");
-                emit(node.right);
-            }
-            function emitEntityNameAsExpression(node, useFallback) {
-                switch (node.kind) {
-                    case 69 /* Identifier */:
-                        if (useFallback) {
-                            write("typeof ");
-                            emitExpressionIdentifier(node);
-                            write(" !== 'undefined' && ");
-                        }
-                        emitExpressionIdentifier(node);
-                        break;
-                    case 139 /* QualifiedName */:
-                        emitQualifiedNameAsExpression(node, useFallback);
-                        break;
-                    default:
-                        emitNodeWithoutSourceMap(node);
-                        break;
-                }
-            }
-            function emitIndexedAccess(node) {
-                if (tryEmitConstantValue(node)) {
-                    return;
-                }
-                if (languageVersion === 2 /* ES6 */ &&
-                    node.expression.kind === 95 /* SuperKeyword */ &&
-                    isInAsyncMethodWithSuperInES6(node)) {
-                    emitSuperAccessInAsyncMethod(node.expression, node.argumentExpression);
-                    return;
-                }
-                emit(node.expression);
-                write("[");
-                emit(node.argumentExpression);
-                write("]");
-            }
-            function hasSpreadElement(elements) {
-                return ts.forEach(elements, function (e) { return e.kind === 191 /* SpreadElementExpression */; });
-            }
-            function skipParentheses(node) {
-                while (node.kind === 178 /* ParenthesizedExpression */ ||
-                    node.kind === 177 /* TypeAssertionExpression */ ||
-                    node.kind === 195 /* AsExpression */ ||
-                    node.kind === 196 /* NonNullExpression */) {
-                    node = node.expression;
-                }
-                return node;
-            }
-            function emitCallTarget(node) {
-                if (node.kind === 69 /* Identifier */ || node.kind === 97 /* ThisKeyword */ || node.kind === 95 /* SuperKeyword */) {
-                    emit(node);
-                    return node;
-                }
-                var temp = createAndRecordTempVariable(0 /* Auto */);
-                write("(");
-                emit(temp);
-                write(" = ");
-                emit(node);
-                write(")");
-                return temp;
-            }
-            function emitCallWithSpread(node) {
-                var target;
-                var expr = skipParentheses(node.expression);
-                if (expr.kind === 172 /* PropertyAccessExpression */) {
-                    // Target will be emitted as "this" argument
-                    target = emitCallTarget(expr.expression);
-                    write(".");
-                    emit(expr.name);
-                }
-                else if (expr.kind === 173 /* ElementAccessExpression */) {
-                    // Target will be emitted as "this" argument
-                    target = emitCallTarget(expr.expression);
-                    write("[");
-                    emit(expr.argumentExpression);
-                    write("]");
-                }
-                else if (expr.kind === 95 /* SuperKeyword */) {
-                    target = expr;
-                    write("_super");
-                }
-                else {
-                    emit(node.expression);
-                }
-                write(".apply(");
-                if (target) {
-                    if (target.kind === 95 /* SuperKeyword */) {
-                        // Calls of form super(...) and super.foo(...)
-                        emitThis(target);
-                    }
-                    else {
-                        // Calls of form obj.foo(...)
-                        emit(target);
-                    }
-                }
-                else {
-                    // Calls of form foo(...)
-                    write("void 0");
-                }
-                write(", ");
-                emitListWithSpread(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*trailingComma*/ false, /*useConcat*/ true);
-                write(")");
-            }
-            function isInAsyncMethodWithSuperInES6(node) {
-                if (languageVersion === 2 /* ES6 */) {
-                    var container = ts.getSuperContainer(node, /*includeFunctions*/ false);
-                    if (container && resolver.getNodeCheckFlags(container) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function emitSuperAccessInAsyncMethod(superNode, argumentExpression) {
-                var container = ts.getSuperContainer(superNode, /*includeFunctions*/ false);
-                var isSuperBinding = resolver.getNodeCheckFlags(container) & 4096 /* AsyncMethodWithSuperBinding */;
-                write("_super(");
-                emit(argumentExpression);
-                write(isSuperBinding ? ").value" : ")");
-            }
-            function emitCallExpression(node) {
-                if (languageVersion < 2 /* ES6 */ && hasSpreadElement(node.arguments)) {
-                    emitCallWithSpread(node);
-                    return;
-                }
-                var expression = node.expression;
-                var superCall = false;
-                var isAsyncMethodWithSuper = false;
-                if (expression.kind === 95 /* SuperKeyword */) {
-                    emitSuper(expression);
-                    superCall = true;
-                }
-                else {
-                    superCall = ts.isSuperPropertyOrElementAccess(expression);
-                    isAsyncMethodWithSuper = superCall && isInAsyncMethodWithSuperInES6(node);
-                    emit(expression);
-                }
-                if (superCall && (languageVersion < 2 /* ES6 */ || isAsyncMethodWithSuper)) {
-                    write(".call(");
-                    emitThis(expression);
-                    if (node.arguments.length) {
-                        write(", ");
-                        emitCommaList(node.arguments);
-                    }
-                    write(")");
-                }
-                else {
-                    write("(");
-                    emitCommaList(node.arguments);
-                    write(")");
-                }
-            }
-            function emitNewExpression(node) {
-                write("new ");
-                // Spread operator logic is supported in new expressions in ES5 using a combination
-                // of Function.prototype.bind() and Function.prototype.apply().
-                //
-                //     Example:
-                //
-                //         var args = [1, 2, 3, 4, 5];
-                //         new Array(...args);
-                //
-                //     is compiled into the following ES5:
-                //
-                //         var args = [1, 2, 3, 4, 5];
-                //         new (Array.bind.apply(Array, [void 0].concat(args)));
-                //
-                // The 'thisArg' to 'bind' is ignored when invoking the result of 'bind' with 'new',
-                // Thus, we set it to undefined ('void 0').
-                if (languageVersion === 1 /* ES5 */ &&
-                    node.arguments &&
-                    hasSpreadElement(node.arguments)) {
-                    write("(");
-                    var target = emitCallTarget(node.expression);
-                    write(".bind.apply(");
-                    emit(target);
-                    write(", [void 0].concat(");
-                    emitListWithSpread(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*trailingComma*/ false, /*useConcat*/ false);
-                    write(")))");
-                    write("()");
-                }
-                else {
-                    emit(node.expression);
-                    if (node.arguments) {
-                        write("(");
-                        emitCommaList(node.arguments);
-                        write(")");
-                    }
-                }
-            }
-            function emitTaggedTemplateExpression(node) {
-                if (languageVersion >= 2 /* ES6 */) {
-                    emit(node.tag);
-                    write(" ");
-                    emit(node.template);
-                }
-                else {
-                    emitDownlevelTaggedTemplate(node);
-                }
-            }
-            function emitParenExpression(node) {
-                // If the node is synthesized, it means the emitter put the parentheses there,
-                // not the user. If we didn't want them, the emitter would not have put them
-                // there.
-                if (!ts.nodeIsSynthesized(node) && node.parent.kind !== 180 /* ArrowFunction */) {
-                    if (node.expression.kind === 177 /* TypeAssertionExpression */ ||
-                        node.expression.kind === 195 /* AsExpression */ ||
-                        node.expression.kind === 196 /* NonNullExpression */) {
-                        var operand = node.expression.expression;
-                        // Make sure we consider all nested cast expressions, e.g.:
-                        // (<any><number><any>-A).x;
-                        while (operand.kind === 177 /* TypeAssertionExpression */ ||
-                            operand.kind === 195 /* AsExpression */ ||
-                            operand.kind === 196 /* NonNullExpression */) {
-                            operand = operand.expression;
-                        }
-                        // We have an expression of the form: (<Type>SubExpr)
-                        // Emitting this as (SubExpr) is really not desirable. We would like to emit the subexpr as is.
-                        // Omitting the parentheses, however, could cause change in the semantics of the generated
-                        // code if the casted expression has a lower precedence than the rest of the expression, e.g.:
-                        //      (<any>new A).foo should be emitted as (new A).foo and not new A.foo
-                        //      (<any>typeof A).toString() should be emitted as (typeof A).toString() and not typeof A.toString()
-                        //      new (<any>A()) should be emitted as new (A()) and not new A()
-                        //      (<any>function foo() { })() should be emitted as an IIF (function foo(){})() and not declaration function foo(){} ()
-                        if (operand.kind !== 185 /* PrefixUnaryExpression */ &&
-                            operand.kind !== 183 /* VoidExpression */ &&
-                            operand.kind !== 182 /* TypeOfExpression */ &&
-                            operand.kind !== 181 /* DeleteExpression */ &&
-                            operand.kind !== 186 /* PostfixUnaryExpression */ &&
-                            operand.kind !== 175 /* NewExpression */ &&
-                            !(operand.kind === 174 /* CallExpression */ && node.parent.kind === 175 /* NewExpression */) &&
-                            !(operand.kind === 179 /* FunctionExpression */ && node.parent.kind === 174 /* CallExpression */) &&
-                            !(operand.kind === 8 /* NumericLiteral */ && node.parent.kind === 172 /* PropertyAccessExpression */)) {
-                            emit(operand);
-                            return;
-                        }
-                    }
-                }
-                write("(");
-                emit(node.expression);
-                write(")");
-            }
-            function emitDeleteExpression(node) {
-                write(ts.tokenToString(78 /* DeleteKeyword */));
-                write(" ");
-                emit(node.expression);
-            }
-            function emitVoidExpression(node) {
-                write(ts.tokenToString(103 /* VoidKeyword */));
-                write(" ");
-                emit(node.expression);
-            }
-            function emitTypeOfExpression(node) {
-                write(ts.tokenToString(101 /* TypeOfKeyword */));
-                write(" ");
-                emit(node.expression);
-            }
-            function isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node) {
-                if (!isCurrentFileSystemExternalModule() || node.kind !== 69 /* Identifier */ || ts.nodeIsSynthesized(node)) {
-                    return false;
-                }
-                var isVariableDeclarationOrBindingElement = node.parent && (node.parent.kind === 218 /* VariableDeclaration */ || node.parent.kind === 169 /* BindingElement */);
-                var targetDeclaration = isVariableDeclarationOrBindingElement
-                    ? node.parent
-                    : resolver.getReferencedValueDeclaration(node);
-                return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, /*isExported*/ true);
-            }
-            function emitPrefixUnaryExpression(node) {
-                var exportChanged = (node.operator === 41 /* PlusPlusToken */ || node.operator === 42 /* MinusMinusToken */) &&
-                    isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
-                if (exportChanged) {
-                    // emit
-                    // ++x
-                    // as
-                    // exports('x', ++x)
-                    write(exportFunctionForFile + "(\"");
-                    emitNodeWithoutSourceMap(node.operand);
-                    write("\", ");
-                }
-                write(ts.tokenToString(node.operator));
-                // In some cases, we need to emit a space between the operator and the operand. One obvious case
-                // is when the operator is an identifier, like delete or typeof. We also need to do this for plus
-                // and minus expressions in certain cases. Specifically, consider the following two cases (parens
-                // are just for clarity of exposition, and not part of the source code):
-                //
-                //  (+(+1))
-                //  (+(++1))
-                //
-                // We need to emit a space in both cases. In the first case, the absence of a space will make
-                // the resulting expression a prefix increment operation. And in the second, it will make the resulting
-                // expression a prefix increment whose operand is a plus expression - (++(+x))
-                // The same is true of minus of course.
-                if (node.operand.kind === 185 /* PrefixUnaryExpression */) {
-                    var operand = node.operand;
-                    if (node.operator === 35 /* PlusToken */ && (operand.operator === 35 /* PlusToken */ || operand.operator === 41 /* PlusPlusToken */)) {
-                        write(" ");
-                    }
-                    else if (node.operator === 36 /* MinusToken */ && (operand.operator === 36 /* MinusToken */ || operand.operator === 42 /* MinusMinusToken */)) {
-                        write(" ");
-                    }
-                }
-                emit(node.operand);
-                if (exportChanged) {
-                    write(")");
-                }
-            }
-            function emitPostfixUnaryExpression(node) {
-                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
-                if (exportChanged) {
-                    // export function returns the value that was passes as the second argument
-                    // however for postfix unary expressions result value should be the value before modification.
-                    // emit 'x++' as '(export('x', ++x) - 1)' and 'x--' as '(export('x', --x) + 1)'
-                    write("(" + exportFunctionForFile + "(\"");
-                    emitNodeWithoutSourceMap(node.operand);
-                    write("\", ");
-                    write(ts.tokenToString(node.operator));
-                    emit(node.operand);
-                    if (node.operator === 41 /* PlusPlusToken */) {
-                        write(") - 1)");
-                    }
-                    else {
-                        write(") + 1)");
-                    }
-                }
-                else {
-                    emit(node.operand);
-                    write(ts.tokenToString(node.operator));
-                }
-            }
-            function shouldHoistDeclarationInSystemJsModule(node) {
-                return isSourceFileLevelDeclarationInSystemJsModule(node, /*isExported*/ false);
-            }
-            /*
-             * Checks if given node is a source file level declaration (not nested in module/function).
-             * If 'isExported' is true - then declaration must also be exported.
-             * This function is used in two cases:
-             * - check if node is a exported source file level value to determine
-             *   if we should also export the value after its it changed
-             * - check if node is a source level declaration to emit it differently,
-             *   i.e non-exported variable statement 'var x = 1' is hoisted so
-             *   we we emit variable statement 'var' should be dropped.
-             */
-            function isSourceFileLevelDeclarationInSystemJsModule(node, isExported) {
-                if (!node || !isCurrentFileSystemExternalModule()) {
-                    return false;
-                }
-                var current = ts.getRootDeclaration(node).parent;
-                while (current) {
-                    if (current.kind === 256 /* SourceFile */) {
-                        return !isExported || ((ts.getCombinedNodeFlags(node) & 1 /* Export */) !== 0);
-                    }
-                    else if (ts.isDeclaration(current)) {
-                        return false;
-                    }
-                    else {
-                        current = current.parent;
-                    }
-                }
-            }
-            /**
-             * Emit ES7 exponentiation operator downlevel using Math.pow
-             * @param node a binary expression node containing exponentiationOperator (**, **=)
-             */
-            function emitExponentiationOperator(node) {
-                var leftHandSideExpression = node.left;
-                if (node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) {
-                    var synthesizedLHS = void 0;
-                    var shouldEmitParentheses = false;
-                    if (ts.isElementAccessExpression(leftHandSideExpression)) {
-                        shouldEmitParentheses = true;
-                        write("(");
-                        synthesizedLHS = ts.createSynthesizedNode(173 /* ElementAccessExpression */, /*startsOnNewLine*/ false);
-                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, /*canDefineTempVariablesInPlace*/ false, /*shouldEmitCommaBeforeAssignment*/ false);
-                        synthesizedLHS.expression = identifier;
-                        if (leftHandSideExpression.argumentExpression.kind !== 8 /* NumericLiteral */ &&
-                            leftHandSideExpression.argumentExpression.kind !== 9 /* StringLiteral */) {
-                            var tempArgumentExpression = createAndRecordTempVariable(268435456 /* _i */);
-                            synthesizedLHS.argumentExpression = tempArgumentExpression;
-                            emitAssignment(tempArgumentExpression, leftHandSideExpression.argumentExpression, /*shouldEmitCommaBeforeAssignment*/ true, leftHandSideExpression.expression);
-                        }
-                        else {
-                            synthesizedLHS.argumentExpression = leftHandSideExpression.argumentExpression;
-                        }
-                        write(", ");
-                    }
-                    else if (ts.isPropertyAccessExpression(leftHandSideExpression)) {
-                        shouldEmitParentheses = true;
-                        write("(");
-                        synthesizedLHS = ts.createSynthesizedNode(172 /* PropertyAccessExpression */, /*startsOnNewLine*/ false);
-                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, /*canDefineTempVariablesInPlace*/ false, /*shouldEmitCommaBeforeAssignment*/ false);
-                        synthesizedLHS.expression = identifier;
-                        synthesizedLHS.dotToken = leftHandSideExpression.dotToken;
-                        synthesizedLHS.name = leftHandSideExpression.name;
-                        write(", ");
-                    }
-                    emit(synthesizedLHS || leftHandSideExpression);
-                    write(" = ");
-                    write("Math.pow(");
-                    emit(synthesizedLHS || leftHandSideExpression);
-                    write(", ");
-                    emit(node.right);
-                    write(")");
-                    if (shouldEmitParentheses) {
-                        write(")");
-                    }
-                }
-                else {
-                    write("Math.pow(");
-                    emit(leftHandSideExpression);
-                    write(", ");
-                    emit(node.right);
-                    write(")");
-                }
-            }
-            function emitBinaryExpression(node) {
-                if (languageVersion < 2 /* ES6 */ && node.operatorToken.kind === 56 /* EqualsToken */ &&
-                    (node.left.kind === 171 /* ObjectLiteralExpression */ || node.left.kind === 170 /* ArrayLiteralExpression */)) {
-                    emitDestructuring(node, node.parent.kind === 202 /* ExpressionStatement */);
-                }
-                else {
-                    var exportChanged = node.operatorToken.kind >= 56 /* FirstAssignment */ &&
-                        node.operatorToken.kind <= 68 /* LastAssignment */ &&
-                        isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left);
-                    if (exportChanged) {
-                        // emit assignment 'x <op> y' as 'exports("x", x <op> y)'
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithoutSourceMap(node.left);
-                        write("\", ");
-                    }
-                    if (node.operatorToken.kind === 38 /* AsteriskAsteriskToken */ || node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) {
-                        // Downleveled emit exponentiation operator using Math.pow
-                        emitExponentiationOperator(node);
-                    }
-                    else {
-                        emit(node.left);
-                        // Add indentation before emit the operator if the operator is on different line
-                        // For example:
-                        //      3
-                        //      + 2;
-                        //   emitted as
-                        //      3
-                        //          + 2;
-                        var indentedBeforeOperator = indentIfOnDifferentLines(node, node.left, node.operatorToken, node.operatorToken.kind !== 24 /* CommaToken */ ? " " : undefined);
-                        write(ts.tokenToString(node.operatorToken.kind));
-                        var indentedAfterOperator = indentIfOnDifferentLines(node, node.operatorToken, node.right, " ");
-                        emit(node.right);
-                        decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator);
-                    }
-                    if (exportChanged) {
-                        write(")");
-                    }
-                }
-            }
-            function synthesizedNodeStartsOnNewLine(node) {
-                return ts.nodeIsSynthesized(node) && node.startsOnNewLine;
-            }
-            function emitConditionalExpression(node) {
-                emit(node.condition);
-                var indentedBeforeQuestion = indentIfOnDifferentLines(node, node.condition, node.questionToken, " ");
-                write("?");
-                var indentedAfterQuestion = indentIfOnDifferentLines(node, node.questionToken, node.whenTrue, " ");
-                emit(node.whenTrue);
-                decreaseIndentIf(indentedBeforeQuestion, indentedAfterQuestion);
-                var indentedBeforeColon = indentIfOnDifferentLines(node, node.whenTrue, node.colonToken, " ");
-                write(":");
-                var indentedAfterColon = indentIfOnDifferentLines(node, node.colonToken, node.whenFalse, " ");
-                emit(node.whenFalse);
-                decreaseIndentIf(indentedBeforeColon, indentedAfterColon);
-            }
-            // Helper function to decrease the indent if we previously indented.  Allows multiple
-            // previous indent values to be considered at a time.  This also allows caller to just
-            // call this once, passing in all their appropriate indent values, instead of needing
-            // to call this helper function multiple times.
-            function decreaseIndentIf(value1, value2) {
-                if (value1) {
-                    decreaseIndent();
-                }
-                if (value2) {
-                    decreaseIndent();
-                }
-            }
-            function isSingleLineEmptyBlock(node) {
-                if (node && node.kind === 199 /* Block */) {
-                    var block = node;
-                    return block.statements.length === 0 && nodeEndIsOnSameLineAsNodeStart(block, block);
-                }
-            }
-            function emitBlock(node) {
-                if (isSingleLineEmptyBlock(node)) {
-                    emitToken(15 /* OpenBraceToken */, node.pos);
-                    write(" ");
-                    emitToken(16 /* CloseBraceToken */, node.statements.end);
-                    return;
-                }
-                emitToken(15 /* OpenBraceToken */, node.pos);
-                increaseIndent();
-                if (node.kind === 226 /* ModuleBlock */) {
-                    ts.Debug.assert(node.parent.kind === 225 /* ModuleDeclaration */);
-                    emitCaptureThisForNodeIfNecessary(node.parent);
-                }
-                emitLines(node.statements);
-                if (node.kind === 226 /* ModuleBlock */) {
-                    emitTempDeclarations(/*newLine*/ true);
-                }
-                decreaseIndent();
-                writeLine();
-                emitToken(16 /* CloseBraceToken */, node.statements.end);
-            }
-            function emitEmbeddedStatement(node) {
-                if (node.kind === 199 /* Block */) {
-                    write(" ");
-                    emit(node);
-                }
-                else {
-                    increaseIndent();
-                    writeLine();
-                    emit(node);
-                    decreaseIndent();
-                }
-            }
-            function emitExpressionStatement(node) {
-                emitParenthesizedIf(node.expression, /*parenthesized*/ node.expression.kind === 180 /* ArrowFunction */);
-                write(";");
-            }
-            function emitIfStatement(node) {
-                var endPos = emitToken(88 /* IfKeyword */, node.pos);
-                write(" ");
-                endPos = emitToken(17 /* OpenParenToken */, endPos);
-                emit(node.expression);
-                emitToken(18 /* CloseParenToken */, node.expression.end);
-                emitEmbeddedStatement(node.thenStatement);
-                if (node.elseStatement) {
-                    writeLine();
-                    emitToken(80 /* ElseKeyword */, node.thenStatement.end);
-                    if (node.elseStatement.kind === 203 /* IfStatement */) {
-                        write(" ");
-                        emit(node.elseStatement);
-                    }
-                    else {
-                        emitEmbeddedStatement(node.elseStatement);
-                    }
-                }
-            }
-            function emitDoStatement(node) {
-                emitLoop(node, emitDoStatementWorker);
-            }
-            function emitDoStatementWorker(node, loop) {
-                write("do");
-                if (loop) {
-                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
-                }
-                else {
-                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
-                }
-                if (node.statement.kind === 199 /* Block */) {
-                    write(" ");
-                }
-                else {
-                    writeLine();
-                }
-                write("while (");
-                emit(node.expression);
-                write(");");
-            }
-            function emitWhileStatement(node) {
-                emitLoop(node, emitWhileStatementWorker);
-            }
-            function emitWhileStatementWorker(node, loop) {
-                write("while (");
-                emit(node.expression);
-                write(")");
-                if (loop) {
-                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
-                }
-                else {
-                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
-                }
-            }
-            /**
-             * Returns true if start of variable declaration list was emitted.
-             * Returns false if nothing was written - this can happen for source file level variable declarations
-             *     in system modules where such variable declarations are hoisted.
-             */
-            function tryEmitStartOfVariableDeclarationList(decl) {
-                if (shouldHoistVariable(decl, /*checkIfSourceFileLevelDecl*/ true)) {
-                    // variables in variable declaration list were already hoisted
-                    return false;
-                }
-                if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072 /* BlockScoped */) === 0) {
-                    // we are inside a converted loop - this can only happen in downlevel scenarios
-                    // record names for all variable declarations
-                    for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) {
-                        var varDecl = _b[_a];
-                        hoistVariableDeclarationFromLoop(convertedLoopState, varDecl);
-                    }
-                    return false;
-                }
-                emitStart(decl);
-                if (decl && languageVersion >= 2 /* ES6 */) {
-                    if (ts.isLet(decl)) {
-                        write("let ");
-                    }
-                    else if (ts.isConst(decl)) {
-                        write("const ");
-                    }
-                    else {
-                        write("var ");
-                    }
-                }
-                else {
-                    write("var ");
-                }
-                // Note here we specifically dont emit end so that if we are going to emit binding pattern
-                // we can alter the source map correctly
-                return true;
-            }
-            function emitVariableDeclarationListSkippingUninitializedEntries(list) {
-                var started = false;
-                for (var _a = 0, _b = list.declarations; _a < _b.length; _a++) {
-                    var decl = _b[_a];
-                    if (!decl.initializer) {
-                        continue;
-                    }
-                    if (!started) {
-                        started = true;
-                    }
-                    else {
-                        write(", ");
-                    }
-                    emit(decl);
-                }
-                return started;
-            }
-            function shouldConvertLoopBody(node) {
-                return languageVersion < 2 /* ES6 */ &&
-                    (resolver.getNodeCheckFlags(node) & 65536 /* LoopWithCapturedBlockScopedBinding */) !== 0;
-            }
-            function emitLoop(node, loopEmitter) {
-                var shouldConvert = shouldConvertLoopBody(node);
-                if (!shouldConvert) {
-                    loopEmitter(node, /* convertedLoop*/ undefined);
-                }
-                else {
-                    var loop = convertLoopBody(node);
-                    if (node.parent.kind === 214 /* LabeledStatement */) {
-                        // if parent of the loop was labeled statement - attach the label to loop skipping converted loop body
-                        emitLabelAndColon(node.parent);
-                    }
-                    loopEmitter(node, loop);
-                }
-            }
-            function convertLoopBody(node) {
-                var functionName = makeUniqueName("_loop");
-                var loopInitializer;
-                switch (node.kind) {
-                    case 206 /* ForStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                        var initializer = node.initializer;
-                        if (initializer && initializer.kind === 219 /* VariableDeclarationList */) {
-                            loopInitializer = node.initializer;
-                        }
-                        break;
-                }
-                var loopParameters;
-                var loopOutParameters;
-                if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3072 /* BlockScoped */)) {
-                    // if loop initializer contains block scoped variables - they should be passed to converted loop body as parameters
-                    loopParameters = [];
-                    for (var _a = 0, _b = loopInitializer.declarations; _a < _b.length; _a++) {
-                        var varDeclaration = _b[_a];
-                        processVariableDeclaration(varDeclaration.name);
-                    }
-                }
-                var bodyIsBlock = node.statement.kind === 199 /* Block */;
-                var paramList = loopParameters ? loopParameters.join(", ") : "";
-                writeLine();
-                write("var " + functionName + " = function(" + paramList + ")");
-                var convertedOuterLoopState = convertedLoopState;
-                convertedLoopState = { loopOutParameters: loopOutParameters };
-                if (convertedOuterLoopState) {
-                    // convertedOuterLoopState !== undefined means that this converted loop is nested in another converted loop.
-                    // if outer converted loop has already accumulated some state - pass it through
-                    if (convertedOuterLoopState.argumentsName) {
-                        // outer loop has already used 'arguments' so we've already have some name to alias it
-                        // use the same name in all nested loops
-                        convertedLoopState.argumentsName = convertedOuterLoopState.argumentsName;
-                    }
-                    if (convertedOuterLoopState.thisName) {
-                        // outer loop has already used 'this' so we've already have some name to alias it
-                        // use the same name in all nested loops
-                        convertedLoopState.thisName = convertedOuterLoopState.thisName;
-                    }
-                    if (convertedOuterLoopState.hoistedLocalVariables) {
-                        // we've already collected some non-block scoped variable declarations in enclosing loop
-                        // use the same storage in nested loop
-                        convertedLoopState.hoistedLocalVariables = convertedOuterLoopState.hoistedLocalVariables;
-                    }
-                }
-                write(" {");
-                writeLine();
-                increaseIndent();
-                if (bodyIsBlock) {
-                    emitLines(node.statement.statements);
-                }
-                else {
-                    emit(node.statement);
-                }
-                writeLine();
-                // end of loop body -> copy out parameter
-                copyLoopOutParameters(convertedLoopState, 1 /* ToOutParameter */, /*emitAsStatements*/ true);
-                decreaseIndent();
-                writeLine();
-                write("};");
-                writeLine();
-                if (loopOutParameters) {
-                    // declare variables to hold out params for loop body
-                    write("var ");
-                    for (var i = 0; i < loopOutParameters.length; i++) {
-                        if (i !== 0) {
-                            write(", ");
-                        }
-                        write(loopOutParameters[i].outParamName);
-                    }
-                    write(";");
-                    writeLine();
-                }
-                if (convertedLoopState.argumentsName) {
-                    // if alias for arguments is set
-                    if (convertedOuterLoopState) {
-                        // pass it to outer converted loop
-                        convertedOuterLoopState.argumentsName = convertedLoopState.argumentsName;
-                    }
-                    else {
-                        // this is top level converted loop and we need to create an alias for 'arguments' object
-                        write("var " + convertedLoopState.argumentsName + " = arguments;");
-                        writeLine();
-                    }
-                }
-                if (convertedLoopState.thisName) {
-                    // if alias for this is set
-                    if (convertedOuterLoopState) {
-                        // pass it to outer converted loop
-                        convertedOuterLoopState.thisName = convertedLoopState.thisName;
-                    }
-                    else {
-                        // this is top level converted loop so we need to create an alias for 'this' here
-                        // NOTE:
-                        // if converted loops were all nested in arrow function then we'll always emit '_this' so convertedLoopState.thisName will not be set.
-                        // If it is set this means that all nested loops are not nested in arrow function and it is safe to capture 'this'.
-                        write("var " + convertedLoopState.thisName + " = this;");
-                        writeLine();
-                    }
-                }
-                if (convertedLoopState.hoistedLocalVariables) {
-                    // if hoistedLocalVariables !== undefined this means that we've possibly collected some variable declarations to be hoisted later
-                    if (convertedOuterLoopState) {
-                        // pass them to outer converted loop
-                        convertedOuterLoopState.hoistedLocalVariables = convertedLoopState.hoistedLocalVariables;
-                    }
-                    else {
-                        // deduplicate and hoist collected variable declarations
-                        write("var ");
-                        var seen = void 0;
-                        for (var _c = 0, _d = convertedLoopState.hoistedLocalVariables; _c < _d.length; _c++) {
-                            var id = _d[_c];
-                            // Don't initialize seen unless we have at least one element.
-                            // Emit a comma to separate for all but the first element.
-                            if (!seen) {
-                                seen = {};
-                            }
-                            else {
-                                write(", ");
-                            }
-                            if (!ts.hasProperty(seen, id.text)) {
-                                emit(id);
-                                seen[id.text] = id.text;
-                            }
-                        }
-                        write(";");
-                        writeLine();
-                    }
-                }
-                var currentLoopState = convertedLoopState;
-                convertedLoopState = convertedOuterLoopState;
-                return { functionName: functionName, paramList: paramList, state: currentLoopState };
-                function processVariableDeclaration(name) {
-                    if (name.kind === 69 /* Identifier */) {
-                        var nameText = isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(name)
-                            ? getGeneratedNameForNode(name)
-                            : name.text;
-                        loopParameters.push(nameText);
-                        if (resolver.getNodeCheckFlags(name.parent) & 2097152 /* NeedsLoopOutParameter */) {
-                            var reassignedVariable = { originalName: name, outParamName: makeUniqueName("out_" + nameText) };
-                            (loopOutParameters || (loopOutParameters = [])).push(reassignedVariable);
-                        }
-                    }
-                    else {
-                        for (var _a = 0, _b = name.elements; _a < _b.length; _a++) {
-                            var element = _b[_a];
-                            processVariableDeclaration(element.name);
-                        }
-                    }
-                }
-            }
-            function emitNormalLoopBody(node, emitAsEmbeddedStatement) {
-                var saveAllowedNonLabeledJumps;
-                if (convertedLoopState) {
-                    // we get here if we are trying to emit normal loop loop inside converted loop
-                    // set allowedNonLabeledJumps to Break | Continue to mark that break\continue inside the loop should be emitted as is
-                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-                    convertedLoopState.allowedNonLabeledJumps = 2 /* Break */ | 4 /* Continue */;
-                }
-                if (emitAsEmbeddedStatement) {
-                    emitEmbeddedStatement(node.statement);
-                }
-                else if (node.statement.kind === 199 /* Block */) {
-                    emitLines(node.statement.statements);
-                }
-                else {
-                    writeLine();
-                    emit(node.statement);
-                }
-                if (convertedLoopState) {
-                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
-                }
-            }
-            function copyLoopOutParameters(state, copyDirection, emitAsStatements) {
-                if (state.loopOutParameters) {
-                    for (var _a = 0, _b = state.loopOutParameters; _a < _b.length; _a++) {
-                        var outParam = _b[_a];
-                        if (copyDirection === 0 /* ToOriginal */) {
-                            emitIdentifier(outParam.originalName);
-                            write(" = " + outParam.outParamName);
-                        }
-                        else {
-                            write(outParam.outParamName + " = ");
-                            emitIdentifier(outParam.originalName);
-                        }
-                        if (emitAsStatements) {
-                            write(";");
-                            writeLine();
-                        }
-                        else {
-                            write(", ");
-                        }
-                    }
-                }
-            }
-            function emitConvertedLoopCall(loop, emitAsBlock) {
-                if (emitAsBlock) {
-                    write(" {");
-                    writeLine();
-                    increaseIndent();
-                }
-                // loop is considered simple if it does not have any return statements or break\continue that transfer control outside of the loop
-                // simple loops are emitted as just 'loop()';
-                // NOTE: if loop uses only 'continue' it still will be emitted as simple loop
-                var isSimpleLoop = !(loop.state.nonLocalJumps & ~4 /* Continue */) &&
-                    !loop.state.labeledNonLocalBreaks &&
-                    !loop.state.labeledNonLocalContinues;
-                var loopResult = makeUniqueName("state");
-                if (!isSimpleLoop) {
-                    write("var " + loopResult + " = ");
-                }
-                write(loop.functionName + "(" + loop.paramList + ");");
-                writeLine();
-                copyLoopOutParameters(loop.state, 0 /* ToOriginal */, /*emitAsStatements*/ true);
-                if (!isSimpleLoop) {
-                    // for non simple loops we need to store result returned from converted loop function and use it to do dispatching
-                    // converted loop function can return:
-                    // - object - used when body of the converted loop contains return statement. Property "value" of this object stores retuned value
-                    // - string - used to dispatch jumps. "break" and "continue" are used to non-labeled jumps, other values are used to transfer control to
-                    //   different labels
-                    writeLine();
-                    if (loop.state.nonLocalJumps & 8 /* Return */) {
-                        write("if (typeof " + loopResult + " === \"object\") ");
-                        if (convertedLoopState) {
-                            // we are currently nested in another converted loop - return unwrapped result
-                            write("return " + loopResult + ";");
-                            // propagate 'hasReturn' flag to outer loop
-                            convertedLoopState.nonLocalJumps |= 8 /* Return */;
-                        }
-                        else {
-                            // top level converted loop - return unwrapped value
-                            write("return " + loopResult + ".value;");
-                        }
-                        writeLine();
-                    }
-                    if (loop.state.nonLocalJumps & 2 /* Break */) {
-                        write("if (" + loopResult + " === \"break\") break;");
-                        writeLine();
-                    }
-                    // in case of labeled breaks emit code that either breaks to some known label inside outer loop or delegates jump decision to outer loop
-                    emitDispatchTableForLabeledJumps(loopResult, loop.state, convertedLoopState);
-                }
-                if (emitAsBlock) {
-                    writeLine();
-                    decreaseIndent();
-                    write("}");
-                }
-                function emitDispatchTableForLabeledJumps(loopResultVariable, currentLoop, outerLoop) {
-                    if (!currentLoop.labeledNonLocalBreaks && !currentLoop.labeledNonLocalContinues) {
-                        return;
-                    }
-                    write("switch(" + loopResultVariable + ") {");
-                    increaseIndent();
-                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalBreaks, /*isBreak*/ true, loopResultVariable, outerLoop);
-                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalContinues, /*isBreak*/ false, loopResultVariable, outerLoop);
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-                function emitDispatchEntriesForLabeledJumps(table, isBreak, loopResultVariable, outerLoop) {
-                    if (!table) {
-                        return;
-                    }
-                    for (var labelText in table) {
-                        var labelMarker = table[labelText];
-                        writeLine();
-                        write("case \"" + labelMarker + "\": ");
-                        // if there are no outer converted loop or outer label in question is located inside outer converted loop
-                        // then emit labeled break\continue
-                        // otherwise propagate pair 'label -> marker' to outer converted loop and emit 'return labelMarker' so outer loop can later decide what to do
-                        if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) {
-                            if (isBreak) {
-                                write("break ");
-                            }
-                            else {
-                                write("continue ");
-                            }
-                            write(labelText + ";");
-                        }
-                        else {
-                            setLabeledJump(outerLoop, isBreak, labelText, labelMarker);
-                            write("return " + loopResultVariable + ";");
-                        }
-                    }
-                }
-            }
-            function emitForStatement(node) {
-                emitLoop(node, emitForStatementWorker);
-            }
-            function emitForStatementWorker(node, loop) {
-                var endPos = emitToken(86 /* ForKeyword */, node.pos);
-                write(" ");
-                endPos = emitToken(17 /* OpenParenToken */, endPos);
-                if (node.initializer && node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    var variableDeclarationList = node.initializer;
-                    var startIsEmitted = tryEmitStartOfVariableDeclarationList(variableDeclarationList);
-                    if (startIsEmitted) {
-                        emitCommaList(variableDeclarationList.declarations);
-                    }
-                    else {
-                        emitVariableDeclarationListSkippingUninitializedEntries(variableDeclarationList);
-                    }
-                }
-                else if (node.initializer) {
-                    emit(node.initializer);
-                }
-                write(";");
-                emitOptional(" ", node.condition);
-                write(";");
-                emitOptional(" ", node.incrementor);
-                write(")");
-                if (loop) {
-                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
-                }
-                else {
-                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
-                }
-            }
-            function emitForInOrForOfStatement(node) {
-                if (languageVersion < 2 /* ES6 */ && node.kind === 208 /* ForOfStatement */) {
-                    emitLoop(node, emitDownLevelForOfStatementWorker);
-                }
-                else {
-                    emitLoop(node, emitForInOrForOfStatementWorker);
-                }
-            }
-            function emitForInOrForOfStatementWorker(node, loop) {
-                var endPos = emitToken(86 /* ForKeyword */, node.pos);
-                write(" ");
-                endPos = emitToken(17 /* OpenParenToken */, endPos);
-                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    var variableDeclarationList = node.initializer;
-                    if (variableDeclarationList.declarations.length >= 1) {
-                        tryEmitStartOfVariableDeclarationList(variableDeclarationList);
-                        emit(variableDeclarationList.declarations[0]);
-                    }
-                }
-                else {
-                    emit(node.initializer);
-                }
-                if (node.kind === 207 /* ForInStatement */) {
-                    write(" in ");
-                }
-                else {
-                    write(" of ");
-                }
-                emit(node.expression);
-                emitToken(18 /* CloseParenToken */, node.expression.end);
-                if (loop) {
-                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
-                }
-                else {
-                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
-                }
-            }
-            function emitDownLevelForOfStatementWorker(node, loop) {
-                // The following ES6 code:
-                //
-                //    for (let v of expr) { }
-                //
-                // should be emitted as
-                //
-                //    for (let _i = 0, _a = expr; _i < _a.length; _i++) {
-                //        let v = _a[_i];
-                //    }
-                //
-                // where _a and _i are temps emitted to capture the RHS and the counter,
-                // respectively.
-                // When the left hand side is an expression instead of a let declaration,
-                // the "let v" is not emitted.
-                // When the left hand side is a let/const, the v is renamed if there is
-                // another v in scope.
-                // Note that all assignments to the LHS are emitted in the body, including
-                // all destructuring.
-                // Note also that because an extra statement is needed to assign to the LHS,
-                // for-of bodies are always emitted as blocks.
-                var endPos = emitToken(86 /* ForKeyword */, node.pos);
-                write(" ");
-                endPos = emitToken(17 /* OpenParenToken */, endPos);
-                // Do not emit the LHS let declaration yet, because it might contain destructuring.
-                // Do not call recordTempDeclaration because we are declaring the temps
-                // right here. Recording means they will be declared later.
-                // In the case where the user wrote an identifier as the RHS, like this:
-                //
-                //     for (let v of arr) { }
-                //
-                // we can't reuse 'arr' because it might be modified within the body of the loop.
-                var counter = createTempVariable(268435456 /* _i */);
-                var rhsReference = ts.createSynthesizedNode(69 /* Identifier */);
-                rhsReference.text = node.expression.kind === 69 /* Identifier */ ?
-                    makeUniqueName(node.expression.text) :
-                    makeTempVariableName(0 /* Auto */);
-                // This is the let keyword for the counter and rhsReference. The let keyword for
-                // the LHS will be emitted inside the body.
-                emitStart(node.expression);
-                write("var ");
-                // _i = 0
-                emitNodeWithoutSourceMap(counter);
-                write(" = 0");
-                emitEnd(node.expression);
-                // , _a = expr
-                write(", ");
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(rhsReference);
-                write(" = ");
-                emitNodeWithoutSourceMap(node.expression);
-                emitEnd(node.expression);
-                write("; ");
-                // _i < _a.length;
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(counter);
-                write(" < ");
-                emitNodeWithCommentsAndWithoutSourcemap(rhsReference);
-                write(".length");
-                emitEnd(node.expression);
-                write("; ");
-                // _i++)
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(counter);
-                write("++");
-                emitEnd(node.expression);
-                emitToken(18 /* CloseParenToken */, node.expression.end);
-                // Body
-                write(" {");
-                writeLine();
-                increaseIndent();
-                // Initialize LHS
-                // let v = _a[_i];
-                var rhsIterationValue = createElementAccessExpression(rhsReference, counter);
-                emitStart(node.initializer);
-                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    write("var ");
-                    var variableDeclarationList = node.initializer;
-                    if (variableDeclarationList.declarations.length > 0) {
-                        var declaration = variableDeclarationList.declarations[0];
-                        if (ts.isBindingPattern(declaration.name)) {
-                            // This works whether the declaration is a var, let, or const.
-                            // It will use rhsIterationValue _a[_i] as the initializer.
-                            emitDestructuring(declaration, /*isAssignmentExpressionStatement*/ false, rhsIterationValue);
-                        }
-                        else {
-                            // The following call does not include the initializer, so we have
-                            // to emit it separately.
-                            emitNodeWithCommentsAndWithoutSourcemap(declaration);
-                            write(" = ");
-                            emitNodeWithoutSourceMap(rhsIterationValue);
-                        }
-                    }
-                    else {
-                        // It's an empty declaration list. This can only happen in an error case, if the user wrote
-                        //     for (let of []) {}
-                        emitNodeWithoutSourceMap(createTempVariable(0 /* Auto */));
-                        write(" = ");
-                        emitNodeWithoutSourceMap(rhsIterationValue);
-                    }
-                }
-                else {
-                    // Initializer is an expression. Emit the expression in the body, so that it's
-                    // evaluated on every iteration.
-                    var assignmentExpression = createBinaryExpression(node.initializer, 56 /* EqualsToken */, rhsIterationValue, /*startsOnNewLine*/ false);
-                    if (node.initializer.kind === 170 /* ArrayLiteralExpression */ || node.initializer.kind === 171 /* ObjectLiteralExpression */) {
-                        // This is a destructuring pattern, so call emitDestructuring instead of emit. Calling emit will not work, because it will cause
-                        // the BinaryExpression to be passed in instead of the expression statement, which will cause emitDestructuring to crash.
-                        emitDestructuring(assignmentExpression, /*isAssignmentExpressionStatement*/ true, /*value*/ undefined);
-                    }
-                    else {
-                        emitNodeWithCommentsAndWithoutSourcemap(assignmentExpression);
-                    }
-                }
-                emitEnd(node.initializer);
-                write(";");
-                if (loop) {
-                    writeLine();
-                    emitConvertedLoopCall(loop, /*emitAsBlock*/ false);
-                }
-                else {
-                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ false);
-                }
-                writeLine();
-                decreaseIndent();
-                write("}");
-            }
-            function emitBreakOrContinueStatement(node) {
-                if (convertedLoopState) {
-                    // check if we can emit break\continue as is
-                    // it is possible if either
-                    //   - break\continue is statement labeled and label is located inside the converted loop
-                    //   - break\continue is non-labeled and located in non-converted loop\switch statement
-                    var jump = node.kind === 210 /* BreakStatement */ ? 2 /* Break */ : 4 /* Continue */;
-                    var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) ||
-                        (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
-                    if (!canUseBreakOrContinue) {
-                        write("return ");
-                        // explicit exit from loop -> copy out parameters
-                        copyLoopOutParameters(convertedLoopState, 1 /* ToOutParameter */, /*emitAsStatements*/ false);
-                        if (!node.label) {
-                            if (node.kind === 210 /* BreakStatement */) {
-                                convertedLoopState.nonLocalJumps |= 2 /* Break */;
-                                write("\"break\";");
-                            }
-                            else {
-                                convertedLoopState.nonLocalJumps |= 4 /* Continue */;
-                                // note: return value is emitted only to simplify debugging, call to converted loop body does not do any dispatching on it.
-                                write("\"continue\";");
-                            }
-                        }
-                        else {
-                            var labelMarker = void 0;
-                            if (node.kind === 210 /* BreakStatement */) {
-                                labelMarker = "break-" + node.label.text;
-                                setLabeledJump(convertedLoopState, /*isBreak*/ true, node.label.text, labelMarker);
-                            }
-                            else {
-                                labelMarker = "continue-" + node.label.text;
-                                setLabeledJump(convertedLoopState, /*isBreak*/ false, node.label.text, labelMarker);
-                            }
-                            write("\"" + labelMarker + "\";");
-                        }
-                        return;
-                    }
-                }
-                emitToken(node.kind === 210 /* BreakStatement */ ? 70 /* BreakKeyword */ : 75 /* ContinueKeyword */, node.pos);
-                emitOptional(" ", node.label);
-                write(";");
-            }
-            function emitReturnStatement(node) {
-                if (convertedLoopState) {
-                    convertedLoopState.nonLocalJumps |= 8 /* Return */;
-                    write("return { value: ");
-                    if (node.expression) {
-                        emit(node.expression);
-                    }
-                    else {
-                        write("void 0");
-                    }
-                    write(" };");
-                    return;
-                }
-                emitToken(94 /* ReturnKeyword */, node.pos);
-                emitOptional(" ", node.expression);
-                write(";");
-            }
-            function emitWithStatement(node) {
-                write("with (");
-                emit(node.expression);
-                write(")");
-                emitEmbeddedStatement(node.statement);
-            }
-            function emitSwitchStatement(node) {
-                var endPos = emitToken(96 /* SwitchKeyword */, node.pos);
-                write(" ");
-                emitToken(17 /* OpenParenToken */, endPos);
-                emit(node.expression);
-                endPos = emitToken(18 /* CloseParenToken */, node.expression.end);
-                write(" ");
-                var saveAllowedNonLabeledJumps;
-                if (convertedLoopState) {
-                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-                    // for switch statement allow only non-labeled break
-                    convertedLoopState.allowedNonLabeledJumps |= 2 /* Break */;
-                }
-                emitCaseBlock(node.caseBlock, endPos);
-                if (convertedLoopState) {
-                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
-                }
-            }
-            function emitCaseBlock(node, startPos) {
-                emitToken(15 /* OpenBraceToken */, startPos);
-                increaseIndent();
-                emitLines(node.clauses);
-                decreaseIndent();
-                writeLine();
-                emitToken(16 /* CloseBraceToken */, node.clauses.end);
-            }
-            function nodeStartPositionsAreOnSameLine(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node1.pos)) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
-            }
-            function nodeEndPositionsAreOnSameLine(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, node2.end);
-            }
-            function nodeEndIsOnSameLineAsNodeStart(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
-            }
-            function emitCaseOrDefaultClause(node) {
-                if (node.kind === 249 /* CaseClause */) {
-                    write("case ");
-                    emit(node.expression);
-                    write(":");
-                }
-                else {
-                    write("default:");
-                }
-                if (node.statements.length === 1 && nodeStartPositionsAreOnSameLine(node, node.statements[0])) {
-                    write(" ");
-                    emit(node.statements[0]);
-                }
-                else {
-                    increaseIndent();
-                    emitLines(node.statements);
-                    decreaseIndent();
-                }
-            }
-            function emitThrowStatement(node) {
-                write("throw ");
-                emit(node.expression);
-                write(";");
-            }
-            function emitTryStatement(node) {
-                write("try ");
-                emit(node.tryBlock);
-                emit(node.catchClause);
-                if (node.finallyBlock) {
-                    writeLine();
-                    write("finally ");
-                    emit(node.finallyBlock);
-                }
-            }
-            function emitCatchClause(node) {
-                writeLine();
-                var endPos = emitToken(72 /* CatchKeyword */, node.pos);
-                write(" ");
-                emitToken(17 /* OpenParenToken */, endPos);
-                emit(node.variableDeclaration);
-                emitToken(18 /* CloseParenToken */, node.variableDeclaration ? node.variableDeclaration.end : endPos);
-                write(" ");
-                emitBlock(node.block);
-            }
-            function emitDebuggerStatement(node) {
-                emitToken(76 /* DebuggerKeyword */, node.pos);
-                write(";");
-            }
-            function emitLabelAndColon(node) {
-                emit(node.label);
-                write(": ");
-            }
-            function emitLabeledStatement(node) {
-                if (!ts.isIterationStatement(node.statement, /* lookInLabeledStatements */ false) || !shouldConvertLoopBody(node.statement)) {
-                    emitLabelAndColon(node);
-                }
-                if (convertedLoopState) {
-                    if (!convertedLoopState.labels) {
-                        convertedLoopState.labels = {};
-                    }
-                    convertedLoopState.labels[node.label.text] = node.label.text;
-                }
-                emit(node.statement);
-                if (convertedLoopState) {
-                    convertedLoopState.labels[node.label.text] = undefined;
-                }
-            }
-            function getContainingModule(node) {
-                do {
-                    node = node.parent;
-                } while (node && node.kind !== 225 /* ModuleDeclaration */);
-                return node;
-            }
-            function emitContainingModuleName(node) {
-                var container = getContainingModule(node);
-                write(container ? getGeneratedNameForNode(container) : "exports");
-            }
-            function emitModuleMemberName(node) {
-                emitStart(node.name);
-                if (ts.getCombinedNodeFlags(node) & 1 /* Export */) {
-                    var container = getContainingModule(node);
-                    if (container) {
-                        write(getGeneratedNameForNode(container));
-                        write(".");
-                    }
-                    else if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
-                        write("exports.");
-                    }
-                }
-                emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                emitEnd(node.name);
-            }
-            function createVoidZero() {
-                var zero = ts.createSynthesizedNode(8 /* NumericLiteral */);
-                zero.text = "0";
-                var result = ts.createSynthesizedNode(183 /* VoidExpression */);
-                result.expression = zero;
-                return result;
-            }
-            function emitEs6ExportDefaultCompat(node) {
-                if (node.parent.kind === 256 /* SourceFile */) {
-                    ts.Debug.assert(!!(node.flags & 512 /* Default */) || node.kind === 235 /* ExportAssignment */);
-                    // only allow export default at a source file level
-                    if (modulekind === ts.ModuleKind.CommonJS || modulekind === ts.ModuleKind.AMD || modulekind === ts.ModuleKind.UMD) {
-                        if (!isEs6Module) {
-                            if (languageVersion !== 0 /* ES3 */) {
-                                // default value of configurable, enumerable, writable are `false`.
-                                write('Object.defineProperty(exports, "__esModule", { value: true });');
-                                writeLine();
-                            }
-                            else {
-                                write("exports.__esModule = true;");
-                                writeLine();
-                            }
-                        }
-                    }
-                }
-            }
-            function emitExportMemberAssignment(node) {
-                if (node.flags & 1 /* Export */) {
-                    writeLine();
-                    emitStart(node);
-                    // emit call to exporter only for top level nodes
-                    if (modulekind === ts.ModuleKind.System && node.parent === currentSourceFile) {
-                        // emit export default <smth> as
-                        // export("default", <smth>)
-                        write(exportFunctionForFile + "(\"");
-                        if (node.flags & 512 /* Default */) {
-                            write("default");
-                        }
-                        else {
-                            emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                        }
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(")");
-                    }
-                    else {
-                        if (node.flags & 512 /* Default */) {
-                            emitEs6ExportDefaultCompat(node);
-                            if (languageVersion === 0 /* ES3 */) {
-                                write('exports["default"]');
-                            }
-                            else {
-                                write("exports.default");
-                            }
-                        }
-                        else {
-                            emitModuleMemberName(node);
-                        }
-                        write(" = ");
-                        emitDeclarationName(node);
-                    }
-                    emitEnd(node);
-                    write(";");
-                }
-            }
-            function emitExportMemberAssignments(name) {
-                if (modulekind === ts.ModuleKind.System) {
-                    return;
-                }
-                if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
-                    for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
-                        var specifier = _b[_a];
-                        writeLine();
-                        emitStart(specifier.name);
-                        emitContainingModuleName(specifier);
-                        write(".");
-                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                        emitEnd(specifier.name);
-                        write(" = ");
-                        emitExpressionIdentifier(name);
-                        write(";");
-                    }
-                }
-            }
-            function emitExportSpecifierInSystemModule(specifier) {
-                ts.Debug.assert(modulekind === ts.ModuleKind.System);
-                if (!resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name) && !resolver.isValueAliasDeclaration(specifier)) {
-                    return;
-                }
-                writeLine();
-                emitStart(specifier.name);
-                write(exportFunctionForFile + "(\"");
-                emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                write("\", ");
-                emitExpressionIdentifier(specifier.propertyName || specifier.name);
-                write(")");
-                emitEnd(specifier.name);
-                write(";");
-            }
-            /**
-             * Emit an assignment to a given identifier, 'name', with a given expression, 'value'.
-             * @param name an identifier as a left-hand-side operand of the assignment
-             * @param value an expression as a right-hand-side operand of the assignment
-             * @param shouldEmitCommaBeforeAssignment a boolean indicating whether to prefix an assignment with comma
-             */
-            function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) {
-                if (shouldEmitCommaBeforeAssignment) {
-                    write(", ");
-                }
-                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name);
-                if (exportChanged) {
-                    write(exportFunctionForFile + "(\"");
-                    emitNodeWithCommentsAndWithoutSourcemap(name);
-                    write("\", ");
-                }
-                var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 /* VariableDeclaration */ || name.parent.kind === 169 /* BindingElement */);
-                // If this is first var declaration, we need to start at var/let/const keyword instead
-                // otherwise use nodeForSourceMap as the start position
-                emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap);
-                withTemporaryNoSourceMap(function () {
-                    if (isVariableDeclarationOrBindingElement) {
-                        emitModuleMemberName(name.parent);
-                    }
-                    else {
-                        emit(name);
-                    }
-                    write(" = ");
-                    emit(value);
-                });
-                emitEnd(nodeForSourceMap, /*stopOverridingSpan*/ true);
-                if (exportChanged) {
-                    write(")");
-                }
-            }
-            /**
-             * Create temporary variable, emit an assignment of the variable the given expression
-             * @param expression an expression to assign to the newly created temporary variable
-             * @param canDefineTempVariablesInPlace a boolean indicating whether you can define the temporary variable at an assignment location
-             * @param shouldEmitCommaBeforeAssignment a boolean indicating whether an assignment should prefix with comma
-             */
-            function emitTempVariableAssignment(expression, canDefineTempVariablesInPlace, shouldEmitCommaBeforeAssignment, sourceMapNode) {
-                var identifier = createTempVariable(0 /* Auto */);
-                if (!canDefineTempVariablesInPlace) {
-                    recordTempDeclaration(identifier);
-                }
-                emitAssignment(identifier, expression, shouldEmitCommaBeforeAssignment, sourceMapNode || expression.parent);
-                return identifier;
-            }
-            function isFirstVariableDeclaration(root) {
-                return root.kind === 218 /* VariableDeclaration */ &&
-                    root.parent.kind === 219 /* VariableDeclarationList */ &&
-                    root.parent.declarations[0] === root;
-            }
-            function emitDestructuring(root, isAssignmentExpressionStatement, value) {
-                var emitCount = 0;
-                // An exported declaration is actually emitted as an assignment (to a property on the module object), so
-                // temporary variables in an exported declaration need to have real declarations elsewhere
-                // Also temporary variables should be explicitly allocated for source level declarations when module target is system
-                // because actual variable declarations are hoisted
-                var canDefineTempVariablesInPlace = false;
-                if (root.kind === 218 /* VariableDeclaration */) {
-                    var isExported = ts.getCombinedNodeFlags(root) & 1 /* Export */;
-                    var isSourceLevelForSystemModuleKind = shouldHoistDeclarationInSystemJsModule(root);
-                    canDefineTempVariablesInPlace = !isExported && !isSourceLevelForSystemModuleKind;
-                }
-                else if (root.kind === 142 /* Parameter */) {
-                    canDefineTempVariablesInPlace = true;
-                }
-                if (root.kind === 187 /* BinaryExpression */) {
-                    emitAssignmentExpression(root);
-                }
-                else {
-                    ts.Debug.assert(!isAssignmentExpressionStatement);
-                    // If first variable declaration of variable statement correct the start location
-                    if (isFirstVariableDeclaration(root)) {
-                        // Use emit location of "var " as next emit start entry
-                        sourceMap.changeEmitSourcePos();
-                    }
-                    emitBindingElement(root, value);
-                }
-                /**
-                 * Ensures that there exists a declared identifier whose value holds the given expression.
-                 * This function is useful to ensure that the expression's value can be read from in subsequent expressions.
-                 * Unless 'reuseIdentifierExpressions' is false, 'expr' will be returned if it is just an identifier.
-                 *
-                 * @param expr the expression whose value needs to be bound.
-                 * @param reuseIdentifierExpressions true if identifier expressions can simply be returned;
-                 *                                   false if it is necessary to always emit an identifier.
-                 */
-                function ensureIdentifier(expr, reuseIdentifierExpressions, sourceMapNode) {
-                    if (expr.kind === 69 /* Identifier */ && reuseIdentifierExpressions) {
-                        return expr;
-                    }
-                    var identifier = emitTempVariableAssignment(expr, canDefineTempVariablesInPlace, emitCount > 0, sourceMapNode);
-                    emitCount++;
-                    return identifier;
-                }
-                function createDefaultValueCheck(value, defaultValue, sourceMapNode) {
-                    // The value expression will be evaluated twice, so for anything but a simple identifier
-                    // we need to generate a temporary variable
-                    // If the temporary variable needs to be emitted use the source Map node for assignment of that statement
-                    value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode);
-                    // Return the expression 'value === void 0 ? defaultValue : value'
-                    var equals = ts.createSynthesizedNode(187 /* BinaryExpression */);
-                    equals.left = value;
-                    equals.operatorToken = ts.createSynthesizedNode(32 /* EqualsEqualsEqualsToken */);
-                    equals.right = createVoidZero();
-                    return createConditionalExpression(equals, defaultValue, value);
-                }
-                function createConditionalExpression(condition, whenTrue, whenFalse) {
-                    var cond = ts.createSynthesizedNode(188 /* ConditionalExpression */);
-                    cond.condition = condition;
-                    cond.questionToken = ts.createSynthesizedNode(53 /* QuestionToken */);
-                    cond.whenTrue = whenTrue;
-                    cond.colonToken = ts.createSynthesizedNode(54 /* ColonToken */);
-                    cond.whenFalse = whenFalse;
-                    return cond;
-                }
-                function createNumericLiteral(value) {
-                    var node = ts.createSynthesizedNode(8 /* NumericLiteral */);
-                    node.text = "" + value;
-                    return node;
-                }
-                function createPropertyAccessForDestructuringProperty(object, propName) {
-                    var index;
-                    var nameIsComputed = propName.kind === 140 /* ComputedPropertyName */;
-                    if (nameIsComputed) {
-                        // TODO to handle when we look into sourcemaps for computed properties, for now use propName
-                        index = ensureIdentifier(propName.expression, /*reuseIdentifierExpressions*/ false, propName);
-                    }
-                    else {
-                        // We create a synthetic copy of the identifier in order to avoid the rewriting that might
-                        // otherwise occur when the identifier is emitted.
-                        index = ts.createSynthesizedNode(propName.kind);
-                        // We need to unescape identifier here because when parsing an identifier prefixing with "__"
-                        // the parser need to append "_" in order to escape colliding with magic identifiers such as "__proto__"
-                        // Therefore, in order to correctly emit identifiers that are written in original TypeScript file,
-                        // we will unescapeIdentifier to remove additional underscore (if no underscore is added, the function will return original input string)
-                        index.text = ts.unescapeIdentifier(propName.text);
-                    }
-                    return !nameIsComputed && index.kind === 69 /* Identifier */
-                        ? createPropertyAccessExpression(object, index)
-                        : createElementAccessExpression(object, index);
-                }
-                function createSliceCall(value, sliceIndex) {
-                    var call = ts.createSynthesizedNode(174 /* CallExpression */);
-                    var sliceIdentifier = ts.createSynthesizedNode(69 /* Identifier */);
-                    sliceIdentifier.text = "slice";
-                    call.expression = createPropertyAccessExpression(value, sliceIdentifier);
-                    call.arguments = ts.createSynthesizedNodeArray();
-                    call.arguments[0] = createNumericLiteral(sliceIndex);
-                    return call;
-                }
-                function emitObjectLiteralAssignment(target, value, sourceMapNode) {
-                    var properties = target.properties;
-                    if (properties.length !== 1) {
-                        // For anything but a single element destructuring we need to generate a temporary
-                        // to ensure value is evaluated exactly once.
-                        // When doing so we want to highlight the passed in source map node since thats the one needing this temp assignment
-                        value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode);
-                    }
-                    for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) {
-                        var p = properties_5[_a];
-                        if (p.kind === 253 /* PropertyAssignment */ || p.kind === 254 /* ShorthandPropertyAssignment */) {
-                            var propName = p.name;
-                            var target_1 = p.kind === 254 /* ShorthandPropertyAssignment */ ? p : p.initializer || propName;
-                            // Assignment for target = value.propName should highlight whole property, hence use p as source map node
-                            emitDestructuringAssignment(target_1, createPropertyAccessForDestructuringProperty(value, propName), p);
-                        }
-                    }
-                }
-                function emitArrayLiteralAssignment(target, value, sourceMapNode) {
-                    var elements = target.elements;
-                    if (elements.length !== 1) {
-                        // For anything but a single element destructuring we need to generate a temporary
-                        // to ensure value is evaluated exactly once.
-                        // When doing so we want to highlight the passed in source map node since thats the one needing this temp assignment
-                        value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode);
-                    }
-                    for (var i = 0; i < elements.length; i++) {
-                        var e = elements[i];
-                        if (e.kind !== 193 /* OmittedExpression */) {
-                            // Assignment for target = value.propName should highlight whole property, hence use e as source map node
-                            if (e.kind !== 191 /* SpreadElementExpression */) {
-                                emitDestructuringAssignment(e, createElementAccessExpression(value, createNumericLiteral(i)), e);
-                            }
-                            else if (i === elements.length - 1) {
-                                emitDestructuringAssignment(e.expression, createSliceCall(value, i), e);
-                            }
-                        }
-                    }
-                }
-                function emitDestructuringAssignment(target, value, sourceMapNode) {
-                    // When emitting target = value use source map node to highlight, including any temporary assignments needed for this
-                    if (target.kind === 254 /* ShorthandPropertyAssignment */) {
-                        if (target.objectAssignmentInitializer) {
-                            value = createDefaultValueCheck(value, target.objectAssignmentInitializer, sourceMapNode);
-                        }
-                        target = target.name;
-                    }
-                    else if (target.kind === 187 /* BinaryExpression */ && target.operatorToken.kind === 56 /* EqualsToken */) {
-                        value = createDefaultValueCheck(value, target.right, sourceMapNode);
-                        target = target.left;
-                    }
-                    if (target.kind === 171 /* ObjectLiteralExpression */) {
-                        emitObjectLiteralAssignment(target, value, sourceMapNode);
-                    }
-                    else if (target.kind === 170 /* ArrayLiteralExpression */) {
-                        emitArrayLiteralAssignment(target, value, sourceMapNode);
-                    }
-                    else {
-                        emitAssignment(target, value, /*shouldEmitCommaBeforeAssignment*/ emitCount > 0, sourceMapNode);
-                        emitCount++;
-                    }
-                }
-                function emitAssignmentExpression(root) {
-                    var target = root.left;
-                    var value = root.right;
-                    if (ts.isEmptyObjectLiteralOrArrayLiteral(target)) {
-                        emit(value);
-                    }
-                    else if (isAssignmentExpressionStatement) {
-                        // Source map node for root.left = root.right is root
-                        // but if root is synthetic, which could be in below case, use the target which is { a }
-                        // for ({a} of {a: string}) {
-                        // }
-                        emitDestructuringAssignment(target, value, ts.nodeIsSynthesized(root) ? target : root);
-                    }
-                    else {
-                        if (root.parent.kind !== 178 /* ParenthesizedExpression */) {
-                            write("(");
-                        }
-                        // Temporary assignment needed to emit root should highlight whole binary expression
-                        value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, root);
-                        // Source map node for root.left = root.right is root
-                        emitDestructuringAssignment(target, value, root);
-                        write(", ");
-                        emit(value);
-                        if (root.parent.kind !== 178 /* ParenthesizedExpression */) {
-                            write(")");
-                        }
-                    }
-                }
-                function emitBindingElement(target, value) {
-                    // Any temporary assignments needed to emit target = value should point to target
-                    if (target.initializer) {
-                        // Combine value and initializer
-                        value = value ? createDefaultValueCheck(value, target.initializer, target) : target.initializer;
-                    }
-                    else if (!value) {
-                        // Use 'void 0' in absence of value and initializer
-                        value = createVoidZero();
-                    }
-                    if (ts.isBindingPattern(target.name)) {
-                        var pattern = target.name;
-                        var elements = pattern.elements;
-                        var numElements = elements.length;
-                        if (numElements !== 1) {
-                            // For anything other than a single-element destructuring we need to generate a temporary
-                            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
-                            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
-                            // so in that case, we'll intentionally create that temporary.
-                            value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ numElements !== 0, target);
-                        }
-                        for (var i = 0; i < numElements; i++) {
-                            var element = elements[i];
-                            if (pattern.kind === 167 /* ObjectBindingPattern */) {
-                                // Rewrite element to a declaration with an initializer that fetches property
-                                var propName = element.propertyName || element.name;
-                                emitBindingElement(element, createPropertyAccessForDestructuringProperty(value, propName));
-                            }
-                            else if (element.kind !== 193 /* OmittedExpression */) {
-                                if (!element.dotDotDotToken) {
-                                    // Rewrite element to a declaration that accesses array element at index i
-                                    emitBindingElement(element, createElementAccessExpression(value, createNumericLiteral(i)));
-                                }
-                                else if (i === numElements - 1) {
-                                    emitBindingElement(element, createSliceCall(value, i));
-                                }
-                            }
-                        }
-                    }
-                    else {
-                        emitAssignment(target.name, value, /*shouldEmitCommaBeforeAssignment*/ emitCount > 0, target);
-                        emitCount++;
-                    }
-                }
-            }
-            function emitVariableDeclaration(node) {
-                if (ts.isBindingPattern(node.name)) {
-                    var isExported = ts.getCombinedNodeFlags(node) & 1 /* Export */;
-                    if (languageVersion >= 2 /* ES6 */ && (!isExported || modulekind === ts.ModuleKind.ES6)) {
-                        // emit ES6 destructuring only if target module is ES6 or variable is not exported
-                        // exported variables in CJS/AMD are prefixed with 'exports.' so result javascript { exports.toString } = 1; is illegal
-                        var isTopLevelDeclarationInSystemModule = modulekind === ts.ModuleKind.System &&
-                            shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ true);
-                        if (isTopLevelDeclarationInSystemModule) {
-                            // In System modules top level variables are hoisted
-                            // so variable declarations with destructuring are turned into destructuring assignments.
-                            // As a result, they will need parentheses to disambiguate object binding assignments from blocks.
-                            write("(");
-                        }
-                        emit(node.name);
-                        emitOptional(" = ", node.initializer);
-                        if (isTopLevelDeclarationInSystemModule) {
-                            write(")");
-                        }
-                    }
-                    else {
-                        emitDestructuring(node, /*isAssignmentExpressionStatement*/ false);
-                    }
-                }
-                else {
-                    var initializer = node.initializer;
-                    if (!initializer &&
-                        languageVersion < 2 /* ES6 */ &&
-                        // for names - binding patterns that lack initializer there is no point to emit explicit initializer
-                        // since downlevel codegen for destructuring will fail in the absence of initializer so all binding elements will say uninitialized
-                        node.name.kind === 69 /* Identifier */) {
-                        var container = ts.getEnclosingBlockScopeContainer(node);
-                        var flags = resolver.getNodeCheckFlags(node);
-                        // nested let bindings might need to be initialized explicitly to preserve ES6 semantic
-                        // { let x = 1; }
-                        // { let x; } // x here should be undefined. not 1
-                        // NOTES:
-                        // Top level bindings never collide with anything and thus don't require explicit initialization.
-                        // As for nested let bindings there are two cases:
-                        // - nested let bindings that were not renamed definitely should be initialized explicitly
-                        //   { let x = 1; }
-                        //   { let x; if (some-condition) { x = 1}; if (x) { /*1*/ } }
-                        //   Without explicit initialization code in /*1*/ can be executed even if some-condition is evaluated to false
-                        // - renaming introduces fresh name that should not collide with any existing names, however renamed bindings sometimes also should be
-                        //   explicitly initialized. One particular case: non-captured binding declared inside loop body (but not in loop initializer)
-                        //   let x;
-                        //   for (;;) {
-                        //       let x;
-                        //   }
-                        //   in downlevel codegen inner 'x' will be renamed so it won't collide with outer 'x' however it will should be reset on every iteration
-                        //   as if it was declared anew.
-                        //   * Why non-captured binding - because if loop contains block scoped binding captured in some function then loop body will be rewritten
-                        //   to have a fresh scope on every iteration so everything will just work.
-                        //   * Why loop initializer is excluded - since we've introduced a fresh name it already will be undefined.
-                        var isCapturedInFunction = flags & 131072 /* CapturedBlockScopedBinding */;
-                        var isDeclaredInLoop = flags & 262144 /* BlockScopedBindingInLoop */;
-                        var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(container) ||
-                            (isCapturedInFunction && isDeclaredInLoop && container.kind === 199 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false));
-                        var emittedAsNestedLetDeclaration = ts.getCombinedNodeFlags(node) & 1024 /* Let */ &&
-                            !emittedAsTopLevel;
-                        var emitExplicitInitializer = emittedAsNestedLetDeclaration &&
-                            container.kind !== 207 /* ForInStatement */ &&
-                            container.kind !== 208 /* ForOfStatement */ &&
-                            (!resolver.isDeclarationWithCollidingName(node) ||
-                                (isDeclaredInLoop && !isCapturedInFunction && !ts.isIterationStatement(container, /*lookInLabeledStatements*/ false)));
-                        if (emitExplicitInitializer) {
-                            initializer = createVoidZero();
-                        }
-                    }
-                    var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.name);
-                    if (exportChanged) {
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                        write("\", ");
-                    }
-                    emitModuleMemberName(node);
-                    emitOptional(" = ", initializer);
-                    if (exportChanged) {
-                        write(")");
-                    }
-                }
-            }
-            function emitExportVariableAssignments(node) {
-                if (node.kind === 193 /* OmittedExpression */) {
-                    return;
-                }
-                var name = node.name;
-                if (name.kind === 69 /* Identifier */) {
-                    emitExportMemberAssignments(name);
-                }
-                else if (ts.isBindingPattern(name)) {
-                    ts.forEach(name.elements, emitExportVariableAssignments);
-                }
-            }
-            function isES6ExportedDeclaration(node) {
-                return !!(node.flags & 1 /* Export */) &&
-                    modulekind === ts.ModuleKind.ES6 &&
-                    node.parent.kind === 256 /* SourceFile */;
-            }
-            function emitVariableStatement(node) {
-                var startIsEmitted = false;
-                if (node.flags & 1 /* Export */) {
-                    if (isES6ExportedDeclaration(node)) {
-                        // Exported ES6 module member
-                        write("export ");
-                        startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
-                    }
-                }
-                else {
-                    startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
-                }
-                if (startIsEmitted) {
-                    emitCommaList(node.declarationList.declarations);
-                    write(";");
-                }
-                else {
-                    var atLeastOneItem = emitVariableDeclarationListSkippingUninitializedEntries(node.declarationList);
-                    if (atLeastOneItem) {
-                        write(";");
-                    }
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
-                    ts.forEach(node.declarationList.declarations, emitExportVariableAssignments);
-                }
-            }
-            function shouldEmitLeadingAndTrailingCommentsForVariableStatement(node) {
-                // If we're not exporting the variables, there's nothing special here.
-                // Always emit comments for these nodes.
-                if (!(node.flags & 1 /* Export */)) {
-                    return true;
-                }
-                // If we are exporting, but it's a top-level ES6 module exports,
-                // we'll emit the declaration list verbatim, so emit comments too.
-                if (isES6ExportedDeclaration(node)) {
-                    return true;
-                }
-                // Otherwise, only emit if we have at least one initializer present.
-                for (var _a = 0, _b = node.declarationList.declarations; _a < _b.length; _a++) {
-                    var declaration = _b[_a];
-                    if (declaration.initializer) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function emitParameter(node) {
-                if (languageVersion < 2 /* ES6 */) {
-                    if (ts.isBindingPattern(node.name)) {
-                        var name_28 = createTempVariable(0 /* Auto */);
-                        if (!tempParameters) {
-                            tempParameters = [];
-                        }
-                        tempParameters.push(name_28);
-                        emit(name_28);
-                    }
-                    else {
-                        emit(node.name);
-                    }
-                }
-                else {
-                    if (node.dotDotDotToken) {
-                        write("...");
-                    }
-                    emit(node.name);
-                    emitOptional(" = ", node.initializer);
-                }
-            }
-            function emitDefaultValueAssignments(node) {
-                if (languageVersion < 2 /* ES6 */) {
-                    var tempIndex_1 = 0;
-                    ts.forEach(node.parameters, function (parameter) {
-                        // A rest parameter cannot have a binding pattern or an initializer,
-                        // so let's just ignore it.
-                        if (parameter.dotDotDotToken) {
-                            return;
-                        }
-                        var paramName = parameter.name, initializer = parameter.initializer;
-                        if (ts.isBindingPattern(paramName)) {
-                            // In cases where a binding pattern is simply '[]' or '{}',
-                            // we usually don't want to emit a var declaration; however, in the presence
-                            // of an initializer, we must emit that expression to preserve side effects.
-                            var hasBindingElements = paramName.elements.length > 0;
-                            if (hasBindingElements || initializer) {
-                                writeLine();
-                                write("var ");
-                                if (hasBindingElements) {
-                                    emitDestructuring(parameter, /*isAssignmentExpressionStatement*/ false, tempParameters[tempIndex_1]);
-                                }
-                                else {
-                                    emit(tempParameters[tempIndex_1]);
-                                    write(" = ");
-                                    emit(initializer);
-                                }
-                                write(";");
-                                tempIndex_1++;
-                            }
-                        }
-                        else if (initializer) {
-                            writeLine();
-                            emitStart(parameter);
-                            write("if (");
-                            emitNodeWithoutSourceMap(paramName);
-                            write(" === void 0)");
-                            emitEnd(parameter);
-                            write(" { ");
-                            emitStart(parameter);
-                            emitNodeWithCommentsAndWithoutSourcemap(paramName);
-                            write(" = ");
-                            emitNodeWithCommentsAndWithoutSourcemap(initializer);
-                            emitEnd(parameter);
-                            write("; }");
-                        }
-                    });
-                }
-            }
-            function emitRestParameter(node) {
-                if (languageVersion < 2 /* ES6 */ && ts.hasDeclaredRestParameter(node)) {
-                    var restIndex = node.parameters.length - 1;
-                    var restParam = node.parameters[restIndex];
-                    // A rest parameter cannot have a binding pattern, so let's just ignore it if it does.
-                    if (ts.isBindingPattern(restParam.name)) {
-                        return;
-                    }
-                    var tempName = createTempVariable(268435456 /* _i */).text;
-                    writeLine();
-                    emitLeadingComments(restParam);
-                    emitStart(restParam);
-                    write("var ");
-                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
-                    write(" = [];");
-                    emitEnd(restParam);
-                    emitTrailingComments(restParam);
-                    writeLine();
-                    write("for (");
-                    emitStart(restParam);
-                    write("var " + tempName + " = " + restIndex + ";");
-                    emitEnd(restParam);
-                    write(" ");
-                    emitStart(restParam);
-                    write(tempName + " < arguments.length;");
-                    emitEnd(restParam);
-                    write(" ");
-                    emitStart(restParam);
-                    write(tempName + "++");
-                    emitEnd(restParam);
-                    write(") {");
-                    increaseIndent();
-                    writeLine();
-                    emitStart(restParam);
-                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
-                    write("[" + tempName + " - " + restIndex + "] = arguments[" + tempName + "];");
-                    emitEnd(restParam);
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function emitAccessor(node) {
-                write(node.kind === 149 /* GetAccessor */ ? "get " : "set ");
-                emit(node.name);
-                emitSignatureAndBody(node);
-            }
-            function shouldEmitAsArrowFunction(node) {
-                return node.kind === 180 /* ArrowFunction */ && languageVersion >= 2 /* ES6 */;
-            }
-            function emitDeclarationName(node) {
-                if (node.name) {
-                    emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                }
-                else {
-                    write(getGeneratedNameForNode(node));
-                }
-            }
-            function shouldEmitFunctionName(node) {
-                if (node.kind === 179 /* FunctionExpression */) {
-                    // Emit name if one is present
-                    return !!node.name;
-                }
-                if (node.kind === 220 /* FunctionDeclaration */) {
-                    // Emit name if one is present, or emit generated name in down-level case (for export default case)
-                    return !!node.name || modulekind !== ts.ModuleKind.ES6;
-                }
-            }
-            function emitFunctionDeclaration(node) {
-                if (ts.nodeIsMissing(node.body)) {
-                    return emitCommentsOnNotEmittedNode(node);
-                }
-                // TODO (yuisu) : we should not have special cases to condition emitting comments
-                // but have one place to fix check for these conditions.
-                var kind = node.kind, parent = node.parent;
-                if (kind !== 147 /* MethodDeclaration */ &&
-                    kind !== 146 /* MethodSignature */ &&
-                    parent &&
-                    parent.kind !== 253 /* PropertyAssignment */ &&
-                    parent.kind !== 174 /* CallExpression */ &&
-                    parent.kind !== 170 /* ArrayLiteralExpression */) {
-                    // 1. Methods will emit comments at their assignment declaration sites.
-                    //
-                    // 2. If the function is a property of object literal, emitting leading-comments
-                    //    is done by emitNodeWithoutSourceMap which then call this function.
-                    //    In particular, we would like to avoid emit comments twice in following case:
-                    //
-                    //          var obj = {
-                    //              id:
-                    //                  /*comment*/ () => void
-                    //          }
-                    //
-                    // 3. If the function is an argument in call expression, emitting of comments will be
-                    //    taken care of in emit list of arguments inside of 'emitCallExpression'.
-                    //
-                    // 4. If the function is in an array literal, 'emitLinePreservingList' will take care
-                    //    of leading comments.
-                    emitLeadingComments(node);
-                }
-                emitStart(node);
-                // For targeting below es6, emit functions-like declaration including arrow function using function keyword.
-                // When targeting ES6, emit arrow function natively in ES6 by omitting function keyword and using fat arrow instead
-                if (!shouldEmitAsArrowFunction(node)) {
-                    if (isES6ExportedDeclaration(node)) {
-                        write("export ");
-                        if (node.flags & 512 /* Default */) {
-                            write("default ");
-                        }
-                    }
-                    write("function");
-                    if (languageVersion >= 2 /* ES6 */ && node.asteriskToken) {
-                        write("*");
-                    }
-                    write(" ");
-                }
-                if (shouldEmitFunctionName(node)) {
-                    emitDeclarationName(node);
-                }
-                emitSignatureAndBody(node);
-                if (modulekind !== ts.ModuleKind.ES6 && kind === 220 /* FunctionDeclaration */ && parent === currentSourceFile && node.name) {
-                    emitExportMemberAssignments(node.name);
-                }
-                emitEnd(node);
-                if (kind !== 147 /* MethodDeclaration */ &&
-                    kind !== 146 /* MethodSignature */ &&
-                    kind !== 180 /* ArrowFunction */) {
-                    emitTrailingComments(node);
-                }
-            }
-            function emitCaptureThisForNodeIfNecessary(node) {
-                if (resolver.getNodeCheckFlags(node) & 4 /* CaptureThis */) {
-                    writeLine();
-                    emitStart(node);
-                    write("var _this = this;");
-                    emitEnd(node);
-                }
-            }
-            function emitSignatureParameters(node) {
-                increaseIndent();
-                write("(");
-                if (node) {
-                    var parameters = node.parameters;
-                    var skipCount = node.parameters.length && node.parameters[0].name.text === "this" ? 1 : 0;
-                    var omitCount = languageVersion < 2 /* ES6 */ && ts.hasDeclaredRestParameter(node) ? 1 : 0;
-                    emitList(parameters, skipCount, parameters.length - omitCount - skipCount, /*multiLine*/ false, /*trailingComma*/ false);
-                }
-                write(")");
-                decreaseIndent();
-            }
-            function emitSignatureParametersForArrow(node) {
-                // Check whether the parameter list needs parentheses and preserve no-parenthesis
-                if (node.parameters.length === 1 && node.pos === node.parameters[0].pos) {
-                    emit(node.parameters[0]);
-                    return;
-                }
-                emitSignatureParameters(node);
-            }
-            function emitAsyncFunctionBodyForES6(node) {
-                var promiseConstructor = ts.getEntityNameFromTypeNode(node.type);
-                var isArrowFunction = node.kind === 180 /* ArrowFunction */;
-                var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192 /* CaptureArguments */) !== 0;
-                // An async function is emit as an outer function that calls an inner
-                // generator function. To preserve lexical bindings, we pass the current
-                // `this` and `arguments` objects to `__awaiter`. The generator function
-                // passed to `__awaiter` is executed inside of the callback to the
-                // promise constructor.
-                //
-                // The emit for an async arrow without a lexical `arguments` binding might be:
-                //
-                //  // input
-                //  let a = async (b) => { await b; }
-                //
-                //  // output
-                //  let a = (b) => __awaiter(this, void 0, void 0, function* () {
-                //      yield b;
-                //  });
-                //
-                // The emit for an async arrow with a lexical `arguments` binding might be:
-                //
-                //  // input
-                //  let a = async (b) => { await arguments[0]; }
-                //
-                //  // output
-                //  let a = (b) => __awaiter(this, arguments, void 0, function* (arguments) {
-                //      yield arguments[0];
-                //  });
-                //
-                // The emit for an async function expression without a lexical `arguments` binding
-                // might be:
-                //
-                //  // input
-                //  let a = async function (b) {
-                //      await b;
-                //  }
-                //
-                //  // output
-                //  let a = function (b) {
-                //      return __awaiter(this, void 0, void 0, function* () {
-                //          yield b;
-                //      });
-                //  }
-                //
-                // The emit for an async function expression with a lexical `arguments` binding
-                // might be:
-                //
-                //  // input
-                //  let a = async function (b) {
-                //      await arguments[0];
-                //  }
-                //
-                //  // output
-                //  let a = function (b) {
-                //      return __awaiter(this, arguments, void 0, function* (_arguments) {
-                //          yield _arguments[0];
-                //      });
-                //  }
-                //
-                // The emit for an async function expression with a lexical `arguments` binding
-                // and a return type annotation might be:
-                //
-                //  // input
-                //  let a = async function (b): MyPromise<any> {
-                //      await arguments[0];
-                //  }
-                //
-                //  // output
-                //  let a = function (b) {
-                //      return __awaiter(this, arguments, MyPromise, function* (_arguments) {
-                //          yield _arguments[0];
-                //      });
-                //  }
-                //
-                // If this is not an async arrow, emit the opening brace of the function body
-                // and the start of the return statement.
-                if (!isArrowFunction) {
-                    write(" {");
-                    increaseIndent();
-                    writeLine();
-                    if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
-                        writeLines("\nconst _super = (function (geti, seti) {\n    const cache = Object.create(null);\n    return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);");
-                        writeLine();
-                    }
-                    else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
-                        write("const _super = name => super[name];");
-                        writeLine();
-                    }
-                    write("return");
-                }
-                write(" __awaiter(this");
-                if (hasLexicalArguments) {
-                    write(", arguments, ");
-                }
-                else {
-                    write(", void 0, ");
-                }
-                if (languageVersion >= 2 /* ES6 */ || !promiseConstructor) {
-                    write("void 0");
-                }
-                else {
-                    emitEntityNameAsExpression(promiseConstructor, /*useFallback*/ false);
-                }
-                // Emit the call to __awaiter.
-                write(", function* ()");
-                // Emit the signature and body for the inner generator function.
-                emitFunctionBody(node);
-                write(")");
-                // If this is not an async arrow, emit the closing brace of the outer function body.
-                if (!isArrowFunction) {
-                    write(";");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function emitFunctionBody(node) {
-                if (!node.body) {
-                    // There can be no body when there are parse errors.  Just emit an empty block
-                    // in that case.
-                    write(" { }");
-                }
-                else {
-                    if (node.body.kind === 199 /* Block */) {
-                        emitBlockFunctionBody(node, node.body);
-                    }
-                    else {
-                        emitExpressionFunctionBody(node, node.body);
-                    }
-                }
-            }
-            function emitSignatureAndBody(node) {
-                var saveConvertedLoopState = convertedLoopState;
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                // When targeting ES6, emit arrow function natively in ES6
-                if (shouldEmitAsArrowFunction(node)) {
-                    emitSignatureParametersForArrow(node);
-                    write(" =>");
-                }
-                else {
-                    emitSignatureParameters(node);
-                }
-                var isAsync = ts.isAsyncFunctionLike(node);
-                if (isAsync) {
-                    emitAsyncFunctionBodyForES6(node);
-                }
-                else {
-                    emitFunctionBody(node);
-                }
-                if (!isES6ExportedDeclaration(node)) {
-                    emitExportMemberAssignment(node);
-                }
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-            }
-            // Returns true if any preamble code was emitted.
-            function emitFunctionBodyPreamble(node) {
-                emitCaptureThisForNodeIfNecessary(node);
-                emitDefaultValueAssignments(node);
-                emitRestParameter(node);
-            }
-            function emitExpressionFunctionBody(node, body) {
-                if (languageVersion < 2 /* ES6 */ || node.flags & 256 /* Async */) {
-                    emitDownLevelExpressionFunctionBody(node, body);
-                    return;
-                }
-                // For es6 and higher we can emit the expression as is.  However, in the case
-                // where the expression might end up looking like a block when emitted, we'll
-                // also wrap it in parentheses first.  For example if you have: a => <foo>{}
-                // then we need to generate: a => ({})
-                write(" ");
-                // Unwrap all type assertions.
-                var current = body;
-                while (current.kind === 177 /* TypeAssertionExpression */) {
-                    current = current.expression;
-                }
-                emitParenthesizedIf(body, current.kind === 171 /* ObjectLiteralExpression */);
-            }
-            function emitDownLevelExpressionFunctionBody(node, body) {
-                write(" {");
-                increaseIndent();
-                var outPos = writer.getTextPos();
-                emitDetachedCommentsAndUpdateCommentsInfo(node.body);
-                emitFunctionBodyPreamble(node);
-                var preambleEmitted = writer.getTextPos() !== outPos;
-                decreaseIndent();
-                // If we didn't have to emit any preamble code, then attempt to keep the arrow
-                // function on one line.
-                if (!preambleEmitted && nodeStartPositionsAreOnSameLine(node, body)) {
-                    write(" ");
-                    emitStart(body);
-                    write("return ");
-                    emit(body);
-                    emitEnd(body);
-                    write(";");
-                    emitTempDeclarations(/*newLine*/ false);
-                    write(" ");
-                }
-                else {
-                    increaseIndent();
-                    writeLine();
-                    emitLeadingComments(node.body);
-                    emitStart(body);
-                    write("return ");
-                    emit(body);
-                    emitEnd(body);
-                    write(";");
-                    emitTrailingComments(node.body);
-                    emitTempDeclarations(/*newLine*/ true);
-                    decreaseIndent();
-                    writeLine();
-                }
-                emitStart(node.body);
-                write("}");
-                emitEnd(node.body);
-            }
-            function emitBlockFunctionBody(node, body) {
-                write(" {");
-                var initialTextPos = writer.getTextPos();
-                increaseIndent();
-                emitDetachedCommentsAndUpdateCommentsInfo(body.statements);
-                // Emit all the directive prologues (like "use strict").  These have to come before
-                // any other preamble code we write (like parameter initializers).
-                var startIndex = emitDirectivePrologues(body.statements, /*startWithNewLine*/ true);
-                emitFunctionBodyPreamble(node);
-                decreaseIndent();
-                var preambleEmitted = writer.getTextPos() !== initialTextPos;
-                if (!preambleEmitted && nodeEndIsOnSameLineAsNodeStart(body, body)) {
-                    for (var _a = 0, _b = body.statements; _a < _b.length; _a++) {
-                        var statement = _b[_a];
-                        write(" ");
-                        emit(statement);
-                    }
-                    emitTempDeclarations(/*newLine*/ false);
-                    write(" ");
-                    emitLeadingCommentsOfPosition(body.statements.end);
-                }
-                else {
-                    increaseIndent();
-                    emitLinesStartingAt(body.statements, startIndex);
-                    emitTempDeclarations(/*newLine*/ true);
-                    writeLine();
-                    emitLeadingCommentsOfPosition(body.statements.end);
-                    decreaseIndent();
-                }
-                emitToken(16 /* CloseBraceToken */, body.statements.end);
-            }
-            /**
-             * Return the statement at a given index if it is a super-call statement
-             * @param ctor a constructor declaration
-             * @param index an index to constructor's body to check
-             */
-            function getSuperCallAtGivenIndex(ctor, index) {
-                if (!ctor.body) {
-                    return undefined;
-                }
-                var statements = ctor.body.statements;
-                if (!statements || index >= statements.length) {
-                    return undefined;
-                }
-                var statement = statements[index];
-                if (statement.kind === 202 /* ExpressionStatement */) {
-                    return ts.isSuperCallExpression(statement.expression) ? statement : undefined;
-                }
-            }
-            function emitParameterPropertyAssignments(node) {
-                ts.forEach(node.parameters, function (param) {
-                    if (param.flags & 92 /* ParameterPropertyModifier */) {
-                        writeLine();
-                        emitStart(param);
-                        emitStart(param.name);
-                        write("this.");
-                        emitNodeWithoutSourceMap(param.name);
-                        emitEnd(param.name);
-                        write(" = ");
-                        emit(param.name);
-                        write(";");
-                        emitEnd(param);
-                    }
-                });
-            }
-            function emitMemberAccessForPropertyName(memberName) {
-                // This does not emit source map because it is emitted by caller as caller
-                // is aware how the property name changes to the property access
-                // eg. public x = 10; becomes this.x and static x = 10 becomes className.x
-                if (memberName.kind === 9 /* StringLiteral */ || memberName.kind === 8 /* NumericLiteral */) {
-                    write("[");
-                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
-                    write("]");
-                }
-                else if (memberName.kind === 140 /* ComputedPropertyName */) {
-                    emitComputedPropertyName(memberName);
-                }
-                else {
-                    write(".");
-                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
-                }
-            }
-            function getInitializedProperties(node, isStatic) {
-                var properties = [];
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    if (member.kind === 145 /* PropertyDeclaration */ && isStatic === ((member.flags & 32 /* Static */) !== 0) && member.initializer) {
-                        properties.push(member);
-                    }
-                }
-                return properties;
-            }
-            function emitPropertyDeclarations(node, properties) {
-                for (var _a = 0, properties_6 = properties; _a < properties_6.length; _a++) {
-                    var property = properties_6[_a];
-                    emitPropertyDeclaration(node, property);
-                }
-            }
-            function emitPropertyDeclaration(node, property, receiver, isExpression) {
-                writeLine();
-                emitLeadingComments(property);
-                emitStart(property);
-                emitStart(property.name);
-                if (receiver) {
-                    emit(receiver);
-                }
-                else {
-                    if (property.flags & 32 /* Static */) {
-                        emitDeclarationName(node);
-                    }
-                    else {
-                        write("this");
-                    }
-                }
-                emitMemberAccessForPropertyName(property.name);
-                emitEnd(property.name);
-                write(" = ");
-                emit(property.initializer);
-                if (!isExpression) {
-                    write(";");
-                }
-                emitEnd(property);
-                emitTrailingComments(property);
-            }
-            function emitMemberFunctionsForES5AndLower(node) {
-                ts.forEach(node.members, function (member) {
-                    if (member.kind === 198 /* SemicolonClassElement */) {
-                        writeLine();
-                        write(";");
-                    }
-                    else if (member.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) {
-                        if (!member.body) {
-                            return emitCommentsOnNotEmittedNode(member);
-                        }
-                        writeLine();
-                        emitLeadingComments(member);
-                        emitStart(member);
-                        emitStart(member.name);
-                        emitClassMemberPrefix(node, member);
-                        emitMemberAccessForPropertyName(member.name);
-                        emitEnd(member.name);
-                        write(" = ");
-                        emitFunctionDeclaration(member);
-                        emitEnd(member);
-                        write(";");
-                        emitTrailingComments(member);
-                    }
-                    else if (member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */) {
-                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
-                        if (member === accessors.firstAccessor) {
-                            writeLine();
-                            emitStart(member);
-                            write("Object.defineProperty(");
-                            emitStart(member.name);
-                            emitClassMemberPrefix(node, member);
-                            write(", ");
-                            emitExpressionForPropertyName(member.name);
-                            emitEnd(member.name);
-                            write(", {");
-                            increaseIndent();
-                            if (accessors.getAccessor) {
-                                writeLine();
-                                emitLeadingComments(accessors.getAccessor);
-                                write("get: ");
-                                emitStart(accessors.getAccessor);
-                                write("function ");
-                                emitSignatureAndBody(accessors.getAccessor);
-                                emitEnd(accessors.getAccessor);
-                                emitTrailingComments(accessors.getAccessor);
-                                write(",");
-                            }
-                            if (accessors.setAccessor) {
-                                writeLine();
-                                emitLeadingComments(accessors.setAccessor);
-                                write("set: ");
-                                emitStart(accessors.setAccessor);
-                                write("function ");
-                                emitSignatureAndBody(accessors.setAccessor);
-                                emitEnd(accessors.setAccessor);
-                                emitTrailingComments(accessors.setAccessor);
-                                write(",");
-                            }
-                            writeLine();
-                            write("enumerable: true,");
-                            writeLine();
-                            write("configurable: true");
-                            decreaseIndent();
-                            writeLine();
-                            write("});");
-                            emitEnd(member);
-                        }
-                    }
-                });
-            }
-            function emitMemberFunctionsForES6AndHigher(node) {
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    if ((member.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) && !member.body) {
-                        emitCommentsOnNotEmittedNode(member);
-                    }
-                    else if (member.kind === 147 /* MethodDeclaration */ ||
-                        member.kind === 149 /* GetAccessor */ ||
-                        member.kind === 150 /* SetAccessor */) {
-                        writeLine();
-                        emitLeadingComments(member);
-                        emitStart(member);
-                        if (member.flags & 32 /* Static */) {
-                            write("static ");
-                        }
-                        if (member.kind === 149 /* GetAccessor */) {
-                            write("get ");
-                        }
-                        else if (member.kind === 150 /* SetAccessor */) {
-                            write("set ");
-                        }
-                        if (member.asteriskToken) {
-                            write("*");
-                        }
-                        emit(member.name);
-                        emitSignatureAndBody(member);
-                        emitEnd(member);
-                        emitTrailingComments(member);
-                    }
-                    else if (member.kind === 198 /* SemicolonClassElement */) {
-                        writeLine();
-                        write(";");
-                    }
-                }
-            }
-            function emitConstructor(node, baseTypeElement) {
-                var saveConvertedLoopState = convertedLoopState;
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                emitConstructorWorker(node, baseTypeElement);
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-            }
-            function emitConstructorWorker(node, baseTypeElement) {
-                // Check if we have property assignment inside class declaration.
-                // If there is property assignment, we need to emit constructor whether users define it or not
-                // If there is no property assignment, we can omit constructor if users do not define it
-                var hasInstancePropertyWithInitializer = false;
-                // Emit the constructor overload pinned comments
-                ts.forEach(node.members, function (member) {
-                    if (member.kind === 148 /* Constructor */ && !member.body) {
-                        emitCommentsOnNotEmittedNode(member);
-                    }
-                    // Check if there is any non-static property assignment
-                    if (member.kind === 145 /* PropertyDeclaration */ && member.initializer && (member.flags & 32 /* Static */) === 0) {
-                        hasInstancePropertyWithInitializer = true;
-                    }
-                });
-                var ctor = ts.getFirstConstructorWithBody(node);
-                // For target ES6 and above, if there is no user-defined constructor and there is no property assignment
-                // do not emit constructor in class declaration.
-                if (languageVersion >= 2 /* ES6 */ && !ctor && !hasInstancePropertyWithInitializer) {
-                    return;
-                }
-                if (ctor) {
-                    emitLeadingComments(ctor);
-                }
-                emitStart(ctor || node);
-                if (languageVersion < 2 /* ES6 */) {
-                    write("function ");
-                    emitDeclarationName(node);
-                    emitSignatureParameters(ctor);
-                }
-                else {
-                    write("constructor");
-                    if (ctor) {
-                        emitSignatureParameters(ctor);
-                    }
-                    else {
-                        // Based on EcmaScript6 section 14.5.14: Runtime Semantics: ClassDefinitionEvaluation.
-                        // If constructor is empty, then,
-                        //      If ClassHeritageopt is present, then
-                        //          Let constructor be the result of parsing the String "constructor(... args){ super (...args);}" using the syntactic grammar with the goal symbol MethodDefinition.
-                        //      Else,
-                        //          Let constructor be the result of parsing the String "constructor( ){ }" using the syntactic grammar with the goal symbol MethodDefinition
-                        if (baseTypeElement) {
-                            write("(...args)");
-                        }
-                        else {
-                            write("()");
-                        }
-                    }
-                }
-                var startIndex = 0;
-                write(" {");
-                increaseIndent();
-                if (ctor) {
-                    // Emit all the directive prologues (like "use strict").  These have to come before
-                    // any other preamble code we write (like parameter initializers).
-                    startIndex = emitDirectivePrologues(ctor.body.statements, /*startWithNewLine*/ true);
-                    emitDetachedCommentsAndUpdateCommentsInfo(ctor.body.statements);
-                }
-                emitCaptureThisForNodeIfNecessary(node);
-                var superCall;
-                if (ctor) {
-                    emitDefaultValueAssignments(ctor);
-                    emitRestParameter(ctor);
-                    if (baseTypeElement) {
-                        superCall = getSuperCallAtGivenIndex(ctor, startIndex);
-                        if (superCall) {
-                            writeLine();
-                            emit(superCall);
-                        }
-                    }
-                    emitParameterPropertyAssignments(ctor);
-                }
-                else {
-                    if (baseTypeElement) {
-                        writeLine();
-                        emitStart(baseTypeElement);
-                        if (languageVersion < 2 /* ES6 */) {
-                            write("_super.apply(this, arguments);");
-                        }
-                        else {
-                            write("super(...args);");
-                        }
-                        emitEnd(baseTypeElement);
-                    }
-                }
-                emitPropertyDeclarations(node, getInitializedProperties(node, /*isStatic*/ false));
-                if (ctor) {
-                    var statements = ctor.body.statements;
-                    if (superCall) {
-                        statements = statements.slice(1);
-                    }
-                    emitLinesStartingAt(statements, startIndex);
-                }
-                emitTempDeclarations(/*newLine*/ true);
-                writeLine();
-                if (ctor) {
-                    emitLeadingCommentsOfPosition(ctor.body.statements.end);
-                }
-                decreaseIndent();
-                emitToken(16 /* CloseBraceToken */, ctor ? ctor.body.statements.end : node.members.end);
-                emitEnd(ctor || node);
-                if (ctor) {
-                    emitTrailingComments(ctor);
-                }
-            }
-            function emitClassExpression(node) {
-                return emitClassLikeDeclaration(node);
-            }
-            function emitClassDeclaration(node) {
-                return emitClassLikeDeclaration(node);
-            }
-            function emitClassLikeDeclaration(node) {
-                if (languageVersion < 2 /* ES6 */) {
-                    emitClassLikeDeclarationBelowES6(node);
-                }
-                else {
-                    emitClassLikeDeclarationForES6AndHigher(node);
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile && node.name) {
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            function emitClassLikeDeclarationForES6AndHigher(node) {
-                var decoratedClassAlias;
-                var isHoistedDeclarationInSystemModule = shouldHoistDeclarationInSystemJsModule(node);
-                var isDecorated = ts.nodeIsDecorated(node);
-                var rewriteAsClassExpression = isDecorated || isHoistedDeclarationInSystemModule;
-                if (node.kind === 221 /* ClassDeclaration */) {
-                    if (rewriteAsClassExpression) {
-                        // When we emit an ES6 class that has a class decorator, we must tailor the
-                        // emit to certain specific cases.
-                        //
-                        // In the simplest case, we emit the class declaration as a let declaration, and
-                        // evaluate decorators after the close of the class body:
-                        //
-                        //  TypeScript                      | Javascript
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | let C = class C {
-                        //  class C {                       | }
-                        //  }                               | C = __decorate([dec], C);
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | export let C = class C {
-                        //  export class C {                | }
-                        //  }                               | C = __decorate([dec], C);
-                        //  ---------------------------------------------------------------------
-                        //  [Example 1]
-                        //
-                        // If a class declaration contains a reference to itself *inside* of the class body,
-                        // this introduces two bindings to the class: One outside of the class body, and one
-                        // inside of the class body. If we apply decorators as in [Example 1] above, there
-                        // is the possibility that the decorator `dec` will return a new value for the
-                        // constructor, which would result in the binding inside of the class no longer
-                        // pointing to the same reference as the binding outside of the class.
-                        //
-                        // As a result, we must instead rewrite all references to the class *inside* of the
-                        // class body to instead point to a local temporary alias for the class:
-                        //
-                        //  TypeScript                      | Javascript
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | let C_1;
-                        //  class C {                       | let C = C_1 = class C {
-                        //    static x() { return C.y; }    |   static x() { return C_1.y; }
-                        //    static y = 1;                 | }
-                        //  }                               | C.y = 1;
-                        //                                  | C = C_1 = __decorate([dec], C);
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | let C_1;
-                        //  export class C {                | export let C = C_1 = class C {
-                        //    static x() { return C.y; }    |   static x() { return C_1.y; }
-                        //    static y = 1;                 | }
-                        //  }                               | C.y = 1;
-                        //                                  | C = C_1 = __decorate([dec], C);
-                        //  ---------------------------------------------------------------------
-                        //  [Example 2]
-                        //
-                        // If a class declaration is the default export of a module, we instead emit
-                        // the export after the decorated declaration:
-                        //
-                        //  TypeScript                      | Javascript
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | let default_1 = class {
-                        //  export default class {          | }
-                        //  }                               | default_1 = __decorate([dec], default_1);
-                        //                                  | export default default_1;
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | let C = class C {
-                        //  export default class {          | }
-                        //  }                               | C = __decorate([dec], C);
-                        //                                  | export default C;
-                        //  ---------------------------------------------------------------------
-                        //  [Example 3]
-                        //
-                        // If the class declaration is the default export and a reference to itself
-                        // inside of the class body, we must emit both an alias for the class *and*
-                        // move the export after the declaration:
-                        //
-                        //  TypeScript                      | Javascript
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | let C_1;
-                        //  export default class C {        | let C = C_1 = class C {
-                        //    static x() { return C.y; }    |   static x() { return C_1.y; }
-                        //    static y = 1;                 | }
-                        //  }                               | C.y = 1;
-                        //                                  | C = C_1 = __decorate([dec], C);
-                        //                                  | export default C;
-                        //  ---------------------------------------------------------------------
-                        //  [Example 4]
-                        //
-                        // NOTE: we reuse the same rewriting logic for cases when targeting ES6 and module kind is System.
-                        // Because of hoisting top level class declaration need to be emitted as class expressions. 
-                        // Double bind case is only required if node is decorated.
-                        if (isDecorated && resolver.getNodeCheckFlags(node) & 524288 /* ClassWithBodyScopedClassBinding */) {
-                            decoratedClassAlias = ts.unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default"));
-                            decoratedClassAliases[ts.getNodeId(node)] = decoratedClassAlias;
-                            write("let " + decoratedClassAlias + ";");
-                            writeLine();
-                        }
-                        if (isES6ExportedDeclaration(node) && !(node.flags & 512 /* Default */)) {
-                            write("export ");
-                        }
-                        if (!isHoistedDeclarationInSystemModule) {
-                            write("let ");
-                        }
-                        emitDeclarationName(node);
-                        if (decoratedClassAlias !== undefined) {
-                            write(" = " + decoratedClassAlias);
-                        }
-                        write(" = ");
-                    }
-                    else if (isES6ExportedDeclaration(node)) {
-                        write("export ");
-                        if (node.flags & 512 /* Default */) {
-                            write("default ");
-                        }
-                    }
-                }
-                // If the class has static properties, and it's a class expression, then we'll need
-                // to specialize the emit a bit.  for a class expression of the form:
-                //
-                //      class C { static a = 1; static b = 2; ... }
-                //
-                // We'll emit:
-                //
-                //      (_temp = class C { ... }, _temp.a = 1, _temp.b = 2, _temp)
-                //
-                // This keeps the expression as an expression, while ensuring that the static parts
-                // of it have been initialized by the time it is used.
-                var staticProperties = getInitializedProperties(node, /*isStatic*/ true);
-                var isClassExpressionWithStaticProperties = staticProperties.length > 0 && node.kind === 192 /* ClassExpression */;
-                var tempVariable;
-                if (isClassExpressionWithStaticProperties) {
-                    tempVariable = createAndRecordTempVariable(0 /* Auto */);
-                    write("(");
-                    increaseIndent();
-                    emit(tempVariable);
-                    write(" = ");
-                }
-                write("class");
-                // emit name if
-                // - node has a name
-                // - this is default export with static initializers
-                if (node.name || (node.flags & 512 /* Default */ && (staticProperties.length > 0 || modulekind !== ts.ModuleKind.ES6) && !rewriteAsClassExpression)) {
-                    write(" ");
-                    emitDeclarationName(node);
-                }
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-                if (baseTypeNode) {
-                    write(" extends ");
-                    emit(baseTypeNode.expression);
-                }
-                write(" {");
-                increaseIndent();
-                writeLine();
-                emitConstructor(node, baseTypeNode);
-                emitMemberFunctionsForES6AndHigher(node);
-                decreaseIndent();
-                writeLine();
-                emitToken(16 /* CloseBraceToken */, node.members.end);
-                if (rewriteAsClassExpression) {
-                    decoratedClassAliases[ts.getNodeId(node)] = undefined;
-                    write(";");
-                }
-                // Emit static property assignment. Because classDeclaration is lexically evaluated,
-                // it is safe to emit static property assignment after classDeclaration
-                // From ES6 specification:
-                //      HasLexicalDeclaration (N) : Determines if the argument identifier has a binding in this environment record that was created using
-                //                                  a lexical declaration such as a LexicalDeclaration or a ClassDeclaration.
-                if (isClassExpressionWithStaticProperties) {
-                    for (var _a = 0, staticProperties_1 = staticProperties; _a < staticProperties_1.length; _a++) {
-                        var property = staticProperties_1[_a];
-                        write(",");
-                        writeLine();
-                        emitPropertyDeclaration(node, property, /*receiver*/ tempVariable, /*isExpression*/ true);
-                    }
-                    write(",");
-                    writeLine();
-                    emit(tempVariable);
-                    decreaseIndent();
-                    write(")");
-                }
-                else {
-                    writeLine();
-                    emitPropertyDeclarations(node, staticProperties);
-                    emitDecoratorsOfClass(node, decoratedClassAlias);
-                }
-                if (!(node.flags & 1 /* Export */)) {
-                    return;
-                }
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    emitExportMemberAssignment(node);
-                }
-                else {
-                    // If this is an exported class, but not on the top level (i.e. on an internal
-                    // module), export it
-                    if (node.flags & 512 /* Default */) {
-                        // if this is a top level default export of decorated class, write the export after the declaration.
-                        if (isDecorated) {
-                            writeLine();
-                            write("export default ");
-                            emitDeclarationName(node);
-                            write(";");
-                        }
-                    }
-                    else if (node.parent.kind !== 256 /* SourceFile */) {
-                        writeLine();
-                        emitStart(node);
-                        emitModuleMemberName(node);
-                        write(" = ");
-                        emitDeclarationName(node);
-                        emitEnd(node);
-                        write(";");
-                    }
-                }
-            }
-            function emitClassLikeDeclarationBelowES6(node) {
-                if (node.kind === 221 /* ClassDeclaration */) {
-                    // source file level classes in system modules are hoisted so 'var's for them are already defined
-                    if (!shouldHoistDeclarationInSystemJsModule(node)) {
-                        write("var ");
-                    }
-                    emitDeclarationName(node);
-                    write(" = ");
-                }
-                write("(function (");
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-                if (baseTypeNode) {
-                    write("_super");
-                }
-                write(") {");
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                var saveComputedPropertyNamesToGeneratedNames = computedPropertyNamesToGeneratedNames;
-                var saveConvertedLoopState = convertedLoopState;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                computedPropertyNamesToGeneratedNames = undefined;
-                increaseIndent();
-                if (baseTypeNode) {
-                    writeLine();
-                    emitStart(baseTypeNode);
-                    write("__extends(");
-                    emitDeclarationName(node);
-                    write(", _super);");
-                    emitEnd(baseTypeNode);
-                }
-                writeLine();
-                emitConstructor(node, baseTypeNode);
-                emitMemberFunctionsForES5AndLower(node);
-                emitPropertyDeclarations(node, getInitializedProperties(node, /*isStatic*/ true));
-                writeLine();
-                emitDecoratorsOfClass(node, /*decoratedClassAlias*/ undefined);
-                writeLine();
-                emitToken(16 /* CloseBraceToken */, node.members.end, function () {
-                    write("return ");
-                    emitDeclarationName(node);
-                });
-                write(";");
-                emitTempDeclarations(/*newLine*/ true);
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-                computedPropertyNamesToGeneratedNames = saveComputedPropertyNamesToGeneratedNames;
-                decreaseIndent();
-                writeLine();
-                emitToken(16 /* CloseBraceToken */, node.members.end);
-                emitStart(node);
-                write("(");
-                if (baseTypeNode) {
-                    emit(baseTypeNode.expression);
-                }
-                write("))");
-                if (node.kind === 221 /* ClassDeclaration */) {
-                    write(";");
-                }
-                emitEnd(node);
-                if (node.kind === 221 /* ClassDeclaration */) {
-                    emitExportMemberAssignment(node);
-                }
-            }
-            function emitClassMemberPrefix(node, member) {
-                emitDeclarationName(node);
-                if (!(member.flags & 32 /* Static */)) {
-                    write(".prototype");
-                }
-            }
-            function emitDecoratorsOfClass(node, decoratedClassAlias) {
-                emitDecoratorsOfMembers(node, /*staticFlag*/ 0);
-                emitDecoratorsOfMembers(node, 32 /* Static */);
-                emitDecoratorsOfConstructor(node, decoratedClassAlias);
-            }
-            function emitDecoratorsOfConstructor(node, decoratedClassAlias) {
-                var decorators = node.decorators;
-                var constructor = ts.getFirstConstructorWithBody(node);
-                var firstParameterDecorator = constructor && ts.forEach(constructor.parameters, function (parameter) { return parameter.decorators; });
-                // skip decoration of the constructor if neither it nor its parameters are decorated
-                if (!decorators && !firstParameterDecorator) {
-                    return;
-                }
-                // Emit the call to __decorate. Given the class:
-                //
-                //   @dec
-                //   class C {
-                //   }
-                //
-                // The emit for the class is:
-                //
-                //   C = __decorate([dec], C);
-                //
-                writeLine();
-                emitStart(node.decorators || firstParameterDecorator);
-                emitDeclarationName(node);
-                if (decoratedClassAlias !== undefined) {
-                    write(" = " + decoratedClassAlias);
-                }
-                write(" = __decorate([");
-                increaseIndent();
-                writeLine();
-                var decoratorCount = decorators ? decorators.length : 0;
-                var argumentsWritten = emitList(decorators, 0, decoratorCount, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ false, /*noTrailingNewLine*/ true, function (decorator) { return emit(decorator.expression); });
-                if (firstParameterDecorator) {
-                    argumentsWritten += emitDecoratorsOfParameters(constructor, /*leadingComma*/ argumentsWritten > 0);
-                }
-                emitSerializedTypeMetadata(node, /*leadingComma*/ argumentsWritten >= 0);
-                decreaseIndent();
-                writeLine();
-                write("], ");
-                emitDeclarationName(node);
-                write(")");
-                emitEnd(node.decorators || firstParameterDecorator);
-                write(";");
-                writeLine();
-            }
-            function emitDecoratorsOfMembers(node, staticFlag) {
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    // only emit members in the correct group
-                    if ((member.flags & 32 /* Static */) !== staticFlag) {
-                        continue;
-                    }
-                    // skip members that cannot be decorated (such as the constructor)
-                    if (!ts.nodeCanBeDecorated(member)) {
-                        continue;
-                    }
-                    // skip an accessor declaration if it is not the first accessor
-                    var decorators = void 0;
-                    var functionLikeMember = void 0;
-                    if (ts.isAccessor(member)) {
-                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
-                        if (member !== accessors.firstAccessor) {
-                            continue;
-                        }
-                        // get the decorators from the first accessor with decorators
-                        decorators = accessors.firstAccessor.decorators;
-                        if (!decorators && accessors.secondAccessor) {
-                            decorators = accessors.secondAccessor.decorators;
-                        }
-                        // we only decorate parameters of the set accessor
-                        functionLikeMember = accessors.setAccessor;
-                    }
-                    else {
-                        decorators = member.decorators;
-                        // we only decorate the parameters here if this is a method
-                        if (member.kind === 147 /* MethodDeclaration */) {
-                            functionLikeMember = member;
-                        }
-                    }
-                    var firstParameterDecorator = functionLikeMember && ts.forEach(functionLikeMember.parameters, function (parameter) { return parameter.decorators; });
-                    // skip a member if it or any of its parameters are not decorated
-                    if (!decorators && !firstParameterDecorator) {
-                        continue;
-                    }
-                    // Emit the call to __decorate. Given the following:
-                    //
-                    //   class C {
-                    //     @dec method(@dec2 x) {}
-                    //     @dec get accessor() {}
-                    //     @dec prop;
-                    //   }
-                    //
-                    // The emit for a method is:
-                    //
-                    //   __decorate([
-                    //       dec,
-                    //       __param(0, dec2),
-                    //       __metadata("design:type", Function),
-                    //       __metadata("design:paramtypes", [Object]),
-                    //       __metadata("design:returntype", void 0)
-                    //   ], C.prototype, "method", undefined);
-                    //
-                    // The emit for an accessor is:
-                    //
-                    //   __decorate([
-                    //       dec
-                    //   ], C.prototype, "accessor", undefined);
-                    //
-                    // The emit for a property is:
-                    //
-                    //   __decorate([
-                    //       dec
-                    //   ], C.prototype, "prop");
-                    //
-                    writeLine();
-                    emitStart(decorators || firstParameterDecorator);
-                    write("__decorate([");
-                    increaseIndent();
-                    writeLine();
-                    var decoratorCount = decorators ? decorators.length : 0;
-                    var argumentsWritten = emitList(decorators, 0, decoratorCount, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ false, /*noTrailingNewLine*/ true, function (decorator) { return emit(decorator.expression); });
-                    if (firstParameterDecorator) {
-                        argumentsWritten += emitDecoratorsOfParameters(functionLikeMember, argumentsWritten > 0);
-                    }
-                    emitSerializedTypeMetadata(member, argumentsWritten > 0);
-                    decreaseIndent();
-                    writeLine();
-                    write("], ");
-                    emitClassMemberPrefix(node, member);
-                    write(", ");
-                    emitExpressionForPropertyName(member.name);
-                    if (languageVersion > 0 /* ES3 */) {
-                        if (member.kind !== 145 /* PropertyDeclaration */) {
-                            // We emit `null` here to indicate to `__decorate` that it can invoke `Object.getOwnPropertyDescriptor` directly.
-                            // We have this extra argument here so that we can inject an explicit property descriptor at a later date.
-                            write(", null");
-                        }
-                        else {
-                            // We emit `void 0` here to indicate to `__decorate` that it can invoke `Object.defineProperty` directly, but that it
-                            // should not invoke `Object.getOwnPropertyDescriptor`.
-                            write(", void 0");
-                        }
-                    }
-                    write(")");
-                    emitEnd(decorators || firstParameterDecorator);
-                    write(";");
-                    writeLine();
-                }
-            }
-            function emitDecoratorsOfParameters(node, leadingComma) {
-                var argumentsWritten = 0;
-                if (node) {
-                    var parameterIndex_1 = 0;
-                    for (var _a = 0, _b = node.parameters; _a < _b.length; _a++) {
-                        var parameter = _b[_a];
-                        if (ts.nodeIsDecorated(parameter)) {
-                            var decorators = parameter.decorators;
-                            argumentsWritten += emitList(decorators, 0, decorators.length, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ leadingComma, /*noTrailingNewLine*/ true, function (decorator) {
-                                write("__param(" + parameterIndex_1 + ", ");
-                                emit(decorator.expression);
-                                write(")");
-                            });
-                            leadingComma = true;
-                        }
-                        parameterIndex_1++;
-                    }
-                }
-                return argumentsWritten;
-            }
-            function shouldEmitTypeMetadata(node) {
-                // This method determines whether to emit the "design:type" metadata based on the node's kind.
-                // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata
-                // compiler option is set.
-                switch (node.kind) {
-                    case 147 /* MethodDeclaration */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 145 /* PropertyDeclaration */:
-                        return true;
-                }
-                return false;
-            }
-            function shouldEmitReturnTypeMetadata(node) {
-                // This method determines whether to emit the "design:returntype" metadata based on the node's kind.
-                // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata
-                // compiler option is set.
-                switch (node.kind) {
-                    case 147 /* MethodDeclaration */:
-                        return true;
-                }
-                return false;
-            }
-            function shouldEmitParamTypesMetadata(node) {
-                // This method determines whether to emit the "design:paramtypes" metadata based on the node's kind.
-                // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata
-                // compiler option is set.
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 150 /* SetAccessor */:
-                        return true;
-                }
-                return false;
-            }
-            /** Serializes the type of a declaration to an appropriate JS constructor value. Used by the __metadata decorator for a class member. */
-            function emitSerializedTypeOfNode(node) {
-                // serialization of the type of a declaration uses the following rules:
-                //
-                // * The serialized type of a ClassDeclaration is "Function"
-                // * The serialized type of a ParameterDeclaration is the serialized type of its type annotation.
-                // * The serialized type of a PropertyDeclaration is the serialized type of its type annotation.
-                // * The serialized type of an AccessorDeclaration is the serialized type of the return type annotation of its getter or parameter type annotation of its setter.
-                // * The serialized type of any other FunctionLikeDeclaration is "Function".
-                // * The serialized type of any other node is "void 0".
-                //
-                // For rules on serializing type annotations, see `serializeTypeNode`.
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                        write("Function");
-                        return;
-                    case 145 /* PropertyDeclaration */:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 142 /* Parameter */:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 149 /* GetAccessor */:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 150 /* SetAccessor */:
-                        emitSerializedTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
-                        return;
-                }
-                if (ts.isFunctionLike(node)) {
-                    write("Function");
-                    return;
-                }
-                write("void 0");
-            }
-            function emitSerializedTypeNode(node) {
-                if (node) {
-                    switch (node.kind) {
-                        case 103 /* VoidKeyword */:
-                            write("void 0");
-                            return;
-                        case 164 /* ParenthesizedType */:
-                            emitSerializedTypeNode(node.type);
-                            return;
-                        case 156 /* FunctionType */:
-                        case 157 /* ConstructorType */:
-                            write("Function");
-                            return;
-                        case 160 /* ArrayType */:
-                        case 161 /* TupleType */:
-                            write("Array");
-                            return;
-                        case 154 /* TypePredicate */:
-                        case 120 /* BooleanKeyword */:
-                            write("Boolean");
-                            return;
-                        case 132 /* StringKeyword */:
-                        case 166 /* StringLiteralType */:
-                            write("String");
-                            return;
-                        case 130 /* NumberKeyword */:
-                            write("Number");
-                            return;
-                        case 133 /* SymbolKeyword */:
-                            write("Symbol");
-                            return;
-                        case 155 /* TypeReference */:
-                            emitSerializedTypeReferenceNode(node);
-                            return;
-                        case 158 /* TypeQuery */:
-                        case 159 /* TypeLiteral */:
-                        case 162 /* UnionType */:
-                        case 163 /* IntersectionType */:
-                        case 117 /* AnyKeyword */:
-                        case 165 /* ThisType */:
-                            break;
-                        default:
-                            ts.Debug.fail("Cannot serialize unexpected type node.");
-                            break;
-                    }
-                }
-                write("Object");
-            }
-            /** Serializes a TypeReferenceNode to an appropriate JS constructor value. Used by the __metadata decorator. */
-            function emitSerializedTypeReferenceNode(node) {
-                var location = node.parent;
-                while (ts.isDeclaration(location) || ts.isTypeNode(location)) {
-                    location = location.parent;
-                }
-                // Clone the type name and parent it to a location outside of the current declaration.
-                var typeName = ts.cloneEntityName(node.typeName, location);
-                var result = resolver.getTypeReferenceSerializationKind(typeName);
-                switch (result) {
-                    case ts.TypeReferenceSerializationKind.Unknown:
-                        var temp = createAndRecordTempVariable(0 /* Auto */);
-                        write("(typeof (");
-                        emitNodeWithoutSourceMap(temp);
-                        write(" = ");
-                        emitEntityNameAsExpression(typeName, /*useFallback*/ true);
-                        write(") === 'function' && ");
-                        emitNodeWithoutSourceMap(temp);
-                        write(") || Object");
-                        break;
-                    case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
-                        emitEntityNameAsExpression(typeName, /*useFallback*/ false);
-                        break;
-                    case ts.TypeReferenceSerializationKind.VoidType:
-                        write("void 0");
-                        break;
-                    case ts.TypeReferenceSerializationKind.BooleanType:
-                        write("Boolean");
-                        break;
-                    case ts.TypeReferenceSerializationKind.NumberLikeType:
-                        write("Number");
-                        break;
-                    case ts.TypeReferenceSerializationKind.StringLikeType:
-                        write("String");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ArrayLikeType:
-                        write("Array");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ESSymbolType:
-                        if (languageVersion < 2 /* ES6 */) {
-                            write("typeof Symbol === 'function' ? Symbol : Object");
-                        }
-                        else {
-                            write("Symbol");
-                        }
-                        break;
-                    case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
-                        write("Function");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ObjectType:
-                        write("Object");
-                        break;
-                }
-            }
-            /** Serializes the parameter types of a function or the constructor of a class. Used by the __metadata decorator for a method or set accessor. */
-            function emitSerializedParameterTypesOfNode(node) {
-                // serialization of parameter types uses the following rules:
-                //
-                // * If the declaration is a class, the parameters of the first constructor with a body are used.
-                // * If the declaration is function-like and has a body, the parameters of the function are used.
-                //
-                // For the rules on serializing the type of each parameter declaration, see `serializeTypeOfDeclaration`.
-                if (node) {
-                    var valueDeclaration = void 0;
-                    if (node.kind === 221 /* ClassDeclaration */) {
-                        valueDeclaration = ts.getFirstConstructorWithBody(node);
-                    }
-                    else if (ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)) {
-                        valueDeclaration = node;
-                    }
-                    if (valueDeclaration) {
-                        var parameters = valueDeclaration.parameters;
-                        var parameterCount = parameters.length;
-                        if (parameterCount > 0) {
-                            for (var i = 0; i < parameterCount; i++) {
-                                if (i > 0) {
-                                    write(", ");
-                                }
-                                if (parameters[i].dotDotDotToken) {
-                                    var parameterType = parameters[i].type;
-                                    if (parameterType.kind === 160 /* ArrayType */) {
-                                        parameterType = parameterType.elementType;
-                                    }
-                                    else if (parameterType.kind === 155 /* TypeReference */ && parameterType.typeArguments && parameterType.typeArguments.length === 1) {
-                                        parameterType = parameterType.typeArguments[0];
-                                    }
-                                    else {
-                                        parameterType = undefined;
-                                    }
-                                    emitSerializedTypeNode(parameterType);
-                                }
-                                else {
-                                    emitSerializedTypeOfNode(parameters[i]);
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            /** Serializes the return type of function. Used by the __metadata decorator for a method. */
-            function emitSerializedReturnTypeOfNode(node) {
-                if (node && ts.isFunctionLike(node) && node.type) {
-                    emitSerializedTypeNode(node.type);
-                    return;
-                }
-                write("void 0");
-            }
-            function emitSerializedTypeMetadata(node, writeComma) {
-                // This method emits the serialized type metadata for a decorator target.
-                // The caller should have already tested whether the node has decorators.
-                var argumentsWritten = 0;
-                if (compilerOptions.emitDecoratorMetadata) {
-                    if (shouldEmitTypeMetadata(node)) {
-                        if (writeComma) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:type', ");
-                        emitSerializedTypeOfNode(node);
-                        write(")");
-                        argumentsWritten++;
-                    }
-                    if (shouldEmitParamTypesMetadata(node)) {
-                        if (writeComma || argumentsWritten) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:paramtypes', [");
-                        emitSerializedParameterTypesOfNode(node);
-                        write("])");
-                        argumentsWritten++;
-                    }
-                    if (shouldEmitReturnTypeMetadata(node)) {
-                        if (writeComma || argumentsWritten) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:returntype', ");
-                        emitSerializedReturnTypeOfNode(node);
-                        write(")");
-                        argumentsWritten++;
-                    }
-                }
-                return argumentsWritten;
-            }
-            function emitInterfaceDeclaration(node) {
-                emitCommentsOnNotEmittedNode(node);
-            }
-            function shouldEmitEnumDeclaration(node) {
-                var isConstEnum = ts.isConst(node);
-                return !isConstEnum || compilerOptions.preserveConstEnums || compilerOptions.isolatedModules;
-            }
-            function emitEnumDeclaration(node) {
-                // const enums are completely erased during compilation.
-                if (!shouldEmitEnumDeclaration(node)) {
-                    return;
-                }
-                if (!shouldHoistDeclarationInSystemJsModule(node)) {
-                    // do not emit var if variable was already hoisted
-                    var isES6ExportedEnum = isES6ExportedDeclaration(node);
-                    if (!(node.flags & 1 /* Export */) || (isES6ExportedEnum && isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 224 /* EnumDeclaration */))) {
-                        emitStart(node);
-                        if (isES6ExportedEnum) {
-                            write("export ");
-                        }
-                        write("var ");
-                        emit(node.name);
-                        emitEnd(node);
-                        write(";");
-                    }
-                }
-                writeLine();
-                emitStart(node);
-                write("(function (");
-                emitStart(node.name);
-                write(getGeneratedNameForNode(node));
-                emitEnd(node.name);
-                write(") {");
-                increaseIndent();
-                emitLines(node.members);
-                decreaseIndent();
-                writeLine();
-                emitToken(16 /* CloseBraceToken */, node.members.end);
-                write(")(");
-                emitModuleMemberName(node);
-                write(" || (");
-                emitModuleMemberName(node);
-                write(" = {}));");
-                emitEnd(node);
-                if (!isES6ExportedDeclaration(node) && node.flags & 1 /* Export */ && !shouldHoistDeclarationInSystemJsModule(node)) {
-                    // do not emit var if variable was already hoisted
-                    writeLine();
-                    emitStart(node);
-                    write("var ");
-                    emit(node.name);
-                    write(" = ");
-                    emitModuleMemberName(node);
-                    emitEnd(node);
-                    write(";");
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
-                    if (modulekind === ts.ModuleKind.System && (node.flags & 1 /* Export */)) {
-                        // write the call to exporter for enum
-                        writeLine();
-                        write(exportFunctionForFile + "(\"");
-                        emitDeclarationName(node);
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(");");
-                    }
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            function emitEnumMember(node) {
-                var enumParent = node.parent;
-                emitStart(node);
-                write(getGeneratedNameForNode(enumParent));
-                write("[");
-                write(getGeneratedNameForNode(enumParent));
-                write("[");
-                emitExpressionForPropertyName(node.name);
-                write("] = ");
-                writeEnumMemberDeclarationValue(node);
-                write("] = ");
-                emitExpressionForPropertyName(node.name);
-                emitEnd(node);
-                write(";");
-            }
-            function writeEnumMemberDeclarationValue(member) {
-                var value = resolver.getConstantValue(member);
-                if (value !== undefined) {
-                    write(value.toString());
-                    return;
-                }
-                else if (member.initializer) {
-                    emit(member.initializer);
-                }
-                else {
-                    write("undefined");
-                }
-            }
-            function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
-                if (moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) {
-                    var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
-                    return recursiveInnerModule || moduleDeclaration.body;
-                }
-            }
-            function shouldEmitModuleDeclaration(node) {
-                return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules);
-            }
-            function isModuleMergedWithES6Class(node) {
-                return languageVersion === 2 /* ES6 */ && !!(resolver.getNodeCheckFlags(node) & 32768 /* LexicalModuleMergesWithClass */);
-            }
-            function isFirstDeclarationOfKind(node, declarations, kind) {
-                return !ts.forEach(declarations, function (declaration) { return declaration.kind === kind && declaration.pos < node.pos; });
-            }
-            function emitModuleDeclaration(node) {
-                // Emit only if this module is non-ambient.
-                var shouldEmit = shouldEmitModuleDeclaration(node);
-                if (!shouldEmit) {
-                    return emitCommentsOnNotEmittedNode(node);
-                }
-                var hoistedInDeclarationScope = shouldHoistDeclarationInSystemJsModule(node);
-                var emitVarForModule = !hoistedInDeclarationScope && !isModuleMergedWithES6Class(node);
-                if (emitVarForModule) {
-                    var isES6ExportedNamespace = isES6ExportedDeclaration(node);
-                    if (!isES6ExportedNamespace || isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 225 /* ModuleDeclaration */)) {
-                        emitStart(node);
-                        if (isES6ExportedNamespace) {
-                            write("export ");
-                        }
-                        write("var ");
-                        emit(node.name);
-                        write(";");
-                        emitEnd(node);
-                        writeLine();
-                    }
-                }
-                emitStart(node);
-                write("(function (");
-                emitStart(node.name);
-                write(getGeneratedNameForNode(node));
-                emitEnd(node.name);
-                write(") ");
-                if (node.body.kind === 226 /* ModuleBlock */) {
-                    var saveConvertedLoopState = convertedLoopState;
-                    var saveTempFlags = tempFlags;
-                    var saveTempVariables = tempVariables;
-                    convertedLoopState = undefined;
-                    tempFlags = 0;
-                    tempVariables = undefined;
-                    emit(node.body);
-                    ts.Debug.assert(convertedLoopState === undefined);
-                    convertedLoopState = saveConvertedLoopState;
-                    tempFlags = saveTempFlags;
-                    tempVariables = saveTempVariables;
-                }
-                else {
-                    write("{");
-                    increaseIndent();
-                    emitCaptureThisForNodeIfNecessary(node);
-                    writeLine();
-                    emit(node.body);
-                    decreaseIndent();
-                    writeLine();
-                    var moduleBlock = getInnerMostModuleDeclarationFromDottedModule(node).body;
-                    emitToken(16 /* CloseBraceToken */, moduleBlock.statements.end);
-                }
-                write(")(");
-                // write moduleDecl = containingModule.m only if it is not exported es6 module member
-                if ((node.flags & 1 /* Export */) && !isES6ExportedDeclaration(node)) {
-                    emit(node.name);
-                    write(" = ");
-                }
-                emitModuleMemberName(node);
-                write(" || (");
-                emitModuleMemberName(node);
-                write(" = {}));");
-                emitEnd(node);
-                if (!isES6ExportedDeclaration(node) && node.name.kind === 69 /* Identifier */ && node.parent === currentSourceFile) {
-                    if (modulekind === ts.ModuleKind.System && (node.flags & 1 /* Export */)) {
-                        writeLine();
-                        write(exportFunctionForFile + "(\"");
-                        emitDeclarationName(node);
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(");");
-                    }
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            /*
-             * Some bundlers (SystemJS builder) sometimes want to rename dependencies.
-             * Here we check if alternative name was provided for a given moduleName and return it if possible.
-             */
-            function tryRenameExternalModule(moduleName) {
-                if (renamedDependencies && ts.hasProperty(renamedDependencies, moduleName.text)) {
-                    return "\"" + renamedDependencies[moduleName.text] + "\"";
-                }
-                return undefined;
-            }
-            function emitRequire(moduleName) {
-                if (moduleName.kind === 9 /* StringLiteral */) {
-                    write("require(");
-                    var text = tryRenameExternalModule(moduleName);
-                    if (text) {
-                        write(text);
-                    }
-                    else {
-                        emitStart(moduleName);
-                        emitLiteral(moduleName);
-                        emitEnd(moduleName);
-                    }
-                    emitToken(18 /* CloseParenToken */, moduleName.end);
-                }
-                else {
-                    write("require()");
-                }
-            }
-            function getNamespaceDeclarationNode(node) {
-                if (node.kind === 229 /* ImportEqualsDeclaration */) {
-                    return node;
-                }
-                var importClause = node.importClause;
-                if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                    return importClause.namedBindings;
-                }
-            }
-            function isDefaultImport(node) {
-                return node.kind === 230 /* ImportDeclaration */ && node.importClause && !!node.importClause.name;
-            }
-            function emitExportImportAssignments(node) {
-                if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
-                    emitExportMemberAssignments(node.name);
-                }
-                ts.forEachChild(node, emitExportImportAssignments);
-            }
-            function emitImportDeclaration(node) {
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    return emitExternalImportDeclaration(node);
-                }
-                // ES6 import
-                if (node.importClause) {
-                    var shouldEmitDefaultBindings = resolver.isReferencedAliasDeclaration(node.importClause);
-                    var shouldEmitNamedBindings = node.importClause.namedBindings && resolver.isReferencedAliasDeclaration(node.importClause.namedBindings, /* checkChildren */ true);
-                    if (shouldEmitDefaultBindings || shouldEmitNamedBindings) {
-                        write("import ");
-                        emitStart(node.importClause);
-                        if (shouldEmitDefaultBindings) {
-                            emit(node.importClause.name);
-                            if (shouldEmitNamedBindings) {
-                                write(", ");
-                            }
-                        }
-                        if (shouldEmitNamedBindings) {
-                            emitLeadingComments(node.importClause.namedBindings);
-                            emitStart(node.importClause.namedBindings);
-                            if (node.importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                                write("* as ");
-                                emit(node.importClause.namedBindings.name);
-                            }
-                            else {
-                                write("{ ");
-                                emitExportOrImportSpecifierList(node.importClause.namedBindings.elements, resolver.isReferencedAliasDeclaration);
-                                write(" }");
-                            }
-                            emitEnd(node.importClause.namedBindings);
-                            emitTrailingComments(node.importClause.namedBindings);
-                        }
-                        emitEnd(node.importClause);
-                        write(" from ");
-                        emit(node.moduleSpecifier);
-                        write(";");
-                    }
-                }
-                else {
-                    write("import ");
-                    emit(node.moduleSpecifier);
-                    write(";");
-                }
-            }
-            function emitExternalImportDeclaration(node) {
-                if (ts.contains(externalImports, node)) {
-                    var isExportedImport = node.kind === 229 /* ImportEqualsDeclaration */ && (node.flags & 1 /* Export */) !== 0;
-                    var namespaceDeclaration = getNamespaceDeclarationNode(node);
-                    var varOrConst = (languageVersion <= 1 /* ES5 */) ? "var " : "const ";
-                    if (modulekind !== ts.ModuleKind.AMD) {
-                        emitLeadingComments(node);
-                        emitStart(node);
-                        if (namespaceDeclaration && !isDefaultImport(node)) {
-                            // import x = require("foo")
-                            // import * as x from "foo"
-                            if (!isExportedImport) {
-                                write(varOrConst);
-                            }
-                            ;
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                        }
-                        else {
-                            // import "foo"
-                            // import x from "foo"
-                            // import { x, y } from "foo"
-                            // import d, * as x from "foo"
-                            // import d, { x, y } from "foo"
-                            var isNakedImport = 230 /* ImportDeclaration */ && !node.importClause;
-                            if (!isNakedImport) {
-                                write(varOrConst);
-                                write(getGeneratedNameForNode(node));
-                                write(" = ");
-                            }
-                        }
-                        emitRequire(ts.getExternalModuleName(node));
-                        if (namespaceDeclaration && isDefaultImport(node)) {
-                            // import d, * as x from "foo"
-                            write(", ");
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            write(getGeneratedNameForNode(node));
-                        }
-                        write(";");
-                        emitEnd(node);
-                        emitExportImportAssignments(node);
-                        emitTrailingComments(node);
-                    }
-                    else {
-                        if (isExportedImport) {
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            emit(namespaceDeclaration.name);
-                            write(";");
-                        }
-                        else if (namespaceDeclaration && isDefaultImport(node)) {
-                            // import d, * as x from "foo"
-                            write(varOrConst);
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            write(getGeneratedNameForNode(node));
-                            write(";");
-                        }
-                        emitExportImportAssignments(node);
-                    }
-                }
-            }
-            function emitImportEqualsDeclaration(node) {
-                if (ts.isExternalModuleImportEqualsDeclaration(node)) {
-                    emitExternalImportDeclaration(node);
-                    return;
-                }
-                // preserve old compiler's behavior: emit 'var' for import declaration (even if we do not consider them referenced) when
-                // - current file is not external module
-                // - import declaration is top level and target is value imported by entity name
-                if (resolver.isReferencedAliasDeclaration(node) ||
-                    (!isCurrentFileExternalModule && resolver.isTopLevelValueImportEqualsWithEntityName(node))) {
-                    emitLeadingComments(node);
-                    emitStart(node);
-                    // variable declaration for import-equals declaration can be hoisted in system modules
-                    // in this case 'var' should be omitted and emit should contain only initialization
-                    var variableDeclarationIsHoisted = shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ true);
-                    // is it top level export import v = a.b.c in system module?
-                    // if yes - it needs to be rewritten as exporter('v', v = a.b.c)
-                    var isExported = isSourceFileLevelDeclarationInSystemJsModule(node, /*isExported*/ true);
-                    if (!variableDeclarationIsHoisted) {
-                        ts.Debug.assert(!isExported);
-                        if (isES6ExportedDeclaration(node)) {
-                            write("export ");
-                            write("var ");
-                        }
-                        else if (!(node.flags & 1 /* Export */)) {
-                            write("var ");
-                        }
-                    }
-                    if (isExported) {
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithoutSourceMap(node.name);
-                        write("\", ");
-                    }
-                    emitModuleMemberName(node);
-                    write(" = ");
-                    emit(node.moduleReference);
-                    if (isExported) {
-                        write(")");
-                    }
-                    write(";");
-                    emitEnd(node);
-                    emitExportImportAssignments(node);
-                    emitTrailingComments(node);
-                }
-            }
-            function emitExportDeclaration(node) {
-                ts.Debug.assert(modulekind !== ts.ModuleKind.System);
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    if (node.moduleSpecifier && (!node.exportClause || resolver.isValueAliasDeclaration(node))) {
-                        emitStart(node);
-                        var generatedName = getGeneratedNameForNode(node);
-                        if (node.exportClause) {
-                            // export { x, y, ... } from "foo"
-                            if (modulekind !== ts.ModuleKind.AMD) {
-                                write("var ");
-                                write(generatedName);
-                                write(" = ");
-                                emitRequire(ts.getExternalModuleName(node));
-                                write(";");
-                            }
-                            for (var _a = 0, _b = node.exportClause.elements; _a < _b.length; _a++) {
-                                var specifier = _b[_a];
-                                if (resolver.isValueAliasDeclaration(specifier)) {
-                                    writeLine();
-                                    emitStart(specifier);
-                                    emitContainingModuleName(specifier);
-                                    write(".");
-                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                                    write(" = ");
-                                    write(generatedName);
-                                    write(".");
-                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.propertyName || specifier.name);
-                                    write(";");
-                                    emitEnd(specifier);
-                                }
-                            }
-                        }
-                        else {
-                            // export * from "foo"
-                            if (hasExportStarsToExportValues && resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
-                                writeLine();
-                                write("__export(");
-                                if (modulekind !== ts.ModuleKind.AMD) {
-                                    emitRequire(ts.getExternalModuleName(node));
-                                }
-                                else {
-                                    write(generatedName);
-                                }
-                                write(");");
-                            }
-                        }
-                        emitEnd(node);
-                    }
-                }
-                else {
-                    if (!node.exportClause || resolver.isValueAliasDeclaration(node)) {
-                        write("export ");
-                        if (node.exportClause) {
-                            // export { x, y, ... }
-                            write("{ ");
-                            emitExportOrImportSpecifierList(node.exportClause.elements, resolver.isValueAliasDeclaration);
-                            write(" }");
-                        }
-                        else {
-                            write("*");
-                        }
-                        if (node.moduleSpecifier) {
-                            write(" from ");
-                            emit(node.moduleSpecifier);
-                        }
-                        write(";");
-                    }
-                }
-            }
-            function emitExportOrImportSpecifierList(specifiers, shouldEmit) {
-                ts.Debug.assert(modulekind === ts.ModuleKind.ES6);
-                var needsComma = false;
-                for (var _a = 0, specifiers_1 = specifiers; _a < specifiers_1.length; _a++) {
-                    var specifier = specifiers_1[_a];
-                    if (shouldEmit(specifier)) {
-                        if (needsComma) {
-                            write(", ");
-                        }
-                        if (specifier.propertyName) {
-                            emit(specifier.propertyName);
-                            write(" as ");
-                        }
-                        emit(specifier.name);
-                        needsComma = true;
-                    }
-                }
-            }
-            function emitExportAssignment(node) {
-                if (!node.isExportEquals && resolver.isValueAliasDeclaration(node)) {
-                    if (modulekind === ts.ModuleKind.ES6) {
-                        writeLine();
-                        emitStart(node);
-                        write("export default ");
-                        var expression = node.expression;
-                        emit(expression);
-                        if (expression.kind !== 220 /* FunctionDeclaration */ &&
-                            expression.kind !== 221 /* ClassDeclaration */) {
-                            write(";");
-                        }
-                        emitEnd(node);
-                    }
-                    else {
-                        writeLine();
-                        emitStart(node);
-                        if (modulekind === ts.ModuleKind.System) {
-                            write(exportFunctionForFile + "(\"default\",");
-                            emit(node.expression);
-                            write(")");
-                        }
-                        else {
-                            emitEs6ExportDefaultCompat(node);
-                            emitContainingModuleName(node);
-                            if (languageVersion === 0 /* ES3 */) {
-                                write('["default"] = ');
-                            }
-                            else {
-                                write(".default = ");
-                            }
-                            emit(node.expression);
-                        }
-                        write(";");
-                        emitEnd(node);
-                    }
-                }
-            }
-            function collectExternalModuleInfo(sourceFile) {
-                externalImports = [];
-                exportSpecifiers = {};
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                for (var _a = 0, _b = sourceFile.statements; _a < _b.length; _a++) {
-                    var node = _b[_a];
-                    switch (node.kind) {
-                        case 230 /* ImportDeclaration */:
-                            if (!node.importClause ||
-                                resolver.isReferencedAliasDeclaration(node.importClause, /*checkChildren*/ true)) {
-                                // import "mod"
-                                // import x from "mod" where x is referenced
-                                // import * as x from "mod" where x is referenced
-                                // import { x, y } from "mod" where at least one import is referenced
-                                externalImports.push(node);
-                            }
-                            break;
-                        case 229 /* ImportEqualsDeclaration */:
-                            if (node.moduleReference.kind === 240 /* ExternalModuleReference */ && resolver.isReferencedAliasDeclaration(node)) {
-                                // import x = require("mod") where x is referenced
-                                externalImports.push(node);
-                            }
-                            break;
-                        case 236 /* ExportDeclaration */:
-                            if (node.moduleSpecifier) {
-                                if (!node.exportClause) {
-                                    // export * from "mod"
-                                    if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
-                                        externalImports.push(node);
-                                        hasExportStarsToExportValues = true;
-                                    }
-                                }
-                                else if (resolver.isValueAliasDeclaration(node)) {
-                                    // export { x, y } from "mod" where at least one export is a value symbol
-                                    externalImports.push(node);
-                                }
-                            }
-                            else {
-                                // export { x, y }
-                                for (var _c = 0, _d = node.exportClause.elements; _c < _d.length; _c++) {
-                                    var specifier = _d[_c];
-                                    var name_29 = (specifier.propertyName || specifier.name).text;
-                                    (exportSpecifiers[name_29] || (exportSpecifiers[name_29] = [])).push(specifier);
-                                }
-                            }
-                            break;
-                        case 235 /* ExportAssignment */:
-                            if (node.isExportEquals && !exportEquals) {
-                                // export = x
-                                exportEquals = node;
-                            }
-                            break;
-                    }
-                }
-            }
-            function emitExportStarHelper() {
-                if (hasExportStarsToExportValues) {
-                    writeLine();
-                    write("function __export(m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function getLocalNameForExternalImport(node) {
-                var namespaceDeclaration = getNamespaceDeclarationNode(node);
-                if (namespaceDeclaration && !isDefaultImport(node)) {
-                    return ts.getTextOfNodeFromSourceText(currentText, namespaceDeclaration.name);
-                }
-                if (node.kind === 230 /* ImportDeclaration */ && node.importClause) {
-                    return getGeneratedNameForNode(node);
-                }
-                if (node.kind === 236 /* ExportDeclaration */ && node.moduleSpecifier) {
-                    return getGeneratedNameForNode(node);
-                }
-            }
-            function getExternalModuleNameText(importNode, emitRelativePathAsModuleName) {
-                if (emitRelativePathAsModuleName) {
-                    var name_30 = getExternalModuleNameFromDeclaration(host, resolver, importNode);
-                    if (name_30) {
-                        return "\"" + name_30 + "\"";
-                    }
-                }
-                var moduleName = ts.getExternalModuleName(importNode);
-                if (moduleName.kind === 9 /* StringLiteral */) {
-                    return tryRenameExternalModule(moduleName) || getLiteralText(moduleName);
-                }
-                return undefined;
-            }
-            function emitVariableDeclarationsForImports() {
-                if (externalImports.length === 0) {
-                    return;
-                }
-                writeLine();
-                var started = false;
-                for (var _a = 0, externalImports_1 = externalImports; _a < externalImports_1.length; _a++) {
-                    var importNode = externalImports_1[_a];
-                    // do not create variable declaration for exports and imports that lack import clause
-                    var skipNode = importNode.kind === 236 /* ExportDeclaration */ ||
-                        (importNode.kind === 230 /* ImportDeclaration */ && !importNode.importClause);
-                    if (skipNode) {
-                        continue;
-                    }
-                    if (!started) {
-                        write("var ");
-                        started = true;
-                    }
-                    else {
-                        write(", ");
-                    }
-                    write(getLocalNameForExternalImport(importNode));
-                }
-                if (started) {
-                    write(";");
-                }
-            }
-            function emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations) {
-                // when resolving exports local exported entries/indirect exported entries in the module
-                // should always win over entries with similar names that were added via star exports
-                // to support this we store names of local/indirect exported entries in a set.
-                // this set is used to filter names brought by star exports.
-                if (!hasExportStarsToExportValues) {
-                    // local names set is needed only in presence of star exports
-                    return undefined;
-                }
-                // local names set should only be added if we have anything exported
-                if (!exportedDeclarations && ts.isEmpty(exportSpecifiers)) {
-                    // no exported declarations (export var ...) or export specifiers (export {x})
-                    // check if we have any non star export declarations.
-                    var hasExportDeclarationWithExportClause = false;
-                    for (var _a = 0, externalImports_2 = externalImports; _a < externalImports_2.length; _a++) {
-                        var externalImport = externalImports_2[_a];
-                        if (externalImport.kind === 236 /* ExportDeclaration */ && externalImport.exportClause) {
-                            hasExportDeclarationWithExportClause = true;
-                            break;
-                        }
-                    }
-                    if (!hasExportDeclarationWithExportClause) {
-                        // we still need to emit exportStar helper
-                        return emitExportStarFunction(/*localNames*/ undefined);
-                    }
-                }
-                var exportedNamesStorageRef = makeUniqueName("exportedNames");
-                writeLine();
-                write("var " + exportedNamesStorageRef + " = {");
-                increaseIndent();
-                var started = false;
-                if (exportedDeclarations) {
-                    for (var i = 0; i < exportedDeclarations.length; i++) {
-                        // write name of exported declaration, i.e 'export var x...'
-                        writeExportedName(exportedDeclarations[i]);
-                    }
-                }
-                if (exportSpecifiers) {
-                    for (var n in exportSpecifiers) {
-                        for (var _b = 0, _c = exportSpecifiers[n]; _b < _c.length; _b++) {
-                            var specifier = _c[_b];
-                            // write name of export specified, i.e. 'export {x}'
-                            writeExportedName(specifier.name);
-                        }
-                    }
-                }
-                for (var _d = 0, externalImports_3 = externalImports; _d < externalImports_3.length; _d++) {
-                    var externalImport = externalImports_3[_d];
-                    if (externalImport.kind !== 236 /* ExportDeclaration */) {
-                        continue;
-                    }
-                    var exportDecl = externalImport;
-                    if (!exportDecl.exportClause) {
-                        // export * from ...
-                        continue;
-                    }
-                    for (var _e = 0, _f = exportDecl.exportClause.elements; _e < _f.length; _e++) {
-                        var element = _f[_e];
-                        // write name of indirectly exported entry, i.e. 'export {x} from ...'
-                        writeExportedName(element.name || element.propertyName);
-                    }
-                }
-                decreaseIndent();
-                writeLine();
-                write("};");
-                return emitExportStarFunction(exportedNamesStorageRef);
-                function emitExportStarFunction(localNames) {
-                    var exportStarFunction = makeUniqueName("exportStar");
-                    writeLine();
-                    // define an export star helper function
-                    write("function " + exportStarFunction + "(m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("var exports = {};");
-                    writeLine();
-                    write("for(var n in m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("if (n !== \"default\"");
-                    if (localNames) {
-                        write("&& !" + localNames + ".hasOwnProperty(n)");
-                    }
-                    write(") exports[n] = m[n];");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                    writeLine();
-                    write(exportFunctionForFile + "(exports);");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                    return exportStarFunction;
-                }
-                function writeExportedName(node) {
-                    // do not record default exports
-                    // they are local to module and never overwritten (explicitly skipped) by star export
-                    if (node.kind !== 69 /* Identifier */ && node.flags & 512 /* Default */) {
-                        return;
-                    }
-                    if (started) {
-                        write(",");
-                    }
-                    else {
-                        started = true;
-                    }
-                    writeLine();
-                    write("'");
-                    if (node.kind === 69 /* Identifier */) {
-                        emitNodeWithCommentsAndWithoutSourcemap(node);
-                    }
-                    else {
-                        emitDeclarationName(node);
-                    }
-                    write("': true");
-                }
-            }
-            function processTopLevelVariableAndFunctionDeclarations(node) {
-                // per ES6 spec:
-                // 15.2.1.16.4 ModuleDeclarationInstantiation() Concrete Method
-                // - var declarations are initialized to undefined - 14.a.ii
-                // - function/generator declarations are instantiated - 16.a.iv
-                // this means that after module is instantiated but before its evaluation
-                // exported functions are already accessible at import sites
-                // in theory we should hoist only exported functions and its dependencies
-                // in practice to simplify things we'll hoist all source level functions and variable declaration
-                // including variables declarations for module and class declarations
-                var hoistedVars;
-                var hoistedFunctionDeclarations;
-                var exportedDeclarations;
-                visit(node);
-                if (hoistedVars) {
-                    writeLine();
-                    write("var ");
-                    var seen = {};
-                    for (var i = 0; i < hoistedVars.length; i++) {
-                        var local = hoistedVars[i];
-                        var name_31 = local.kind === 69 /* Identifier */
-                            ? local
-                            : local.name;
-                        if (name_31) {
-                            // do not emit duplicate entries (in case of declaration merging) in the list of hoisted variables
-                            var text = ts.unescapeIdentifier(name_31.text);
-                            if (ts.hasProperty(seen, text)) {
-                                continue;
-                            }
-                            else {
-                                seen[text] = text;
-                            }
-                        }
-                        if (i !== 0) {
-                            write(", ");
-                        }
-                        if (local.kind === 221 /* ClassDeclaration */ || local.kind === 225 /* ModuleDeclaration */ || local.kind === 224 /* EnumDeclaration */) {
-                            emitDeclarationName(local);
-                        }
-                        else {
-                            emit(local);
-                        }
-                        var flags = ts.getCombinedNodeFlags(local.kind === 69 /* Identifier */ ? local.parent : local);
-                        if (flags & 1 /* Export */) {
-                            if (!exportedDeclarations) {
-                                exportedDeclarations = [];
-                            }
-                            exportedDeclarations.push(local);
-                        }
-                    }
-                    write(";");
-                }
-                if (hoistedFunctionDeclarations) {
-                    for (var _a = 0, hoistedFunctionDeclarations_1 = hoistedFunctionDeclarations; _a < hoistedFunctionDeclarations_1.length; _a++) {
-                        var f = hoistedFunctionDeclarations_1[_a];
-                        writeLine();
-                        emit(f);
-                        if (f.flags & 1 /* Export */) {
-                            if (!exportedDeclarations) {
-                                exportedDeclarations = [];
-                            }
-                            exportedDeclarations.push(f);
-                        }
-                    }
-                }
-                return exportedDeclarations;
-                function visit(node) {
-                    if (node.flags & 2 /* Ambient */) {
-                        return;
-                    }
-                    if (node.kind === 220 /* FunctionDeclaration */) {
-                        if (!hoistedFunctionDeclarations) {
-                            hoistedFunctionDeclarations = [];
-                        }
-                        hoistedFunctionDeclarations.push(node);
-                        return;
-                    }
-                    if (node.kind === 221 /* ClassDeclaration */) {
-                        if (!hoistedVars) {
-                            hoistedVars = [];
-                        }
-                        hoistedVars.push(node);
-                        return;
-                    }
-                    if (node.kind === 224 /* EnumDeclaration */) {
-                        if (shouldEmitEnumDeclaration(node)) {
-                            if (!hoistedVars) {
-                                hoistedVars = [];
-                            }
-                            hoistedVars.push(node);
-                        }
-                        return;
-                    }
-                    if (node.kind === 225 /* ModuleDeclaration */) {
-                        if (shouldEmitModuleDeclaration(node)) {
-                            if (!hoistedVars) {
-                                hoistedVars = [];
-                            }
-                            hoistedVars.push(node);
-                        }
-                        return;
-                    }
-                    if (node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) {
-                        if (shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ false)) {
-                            var name_32 = node.name;
-                            if (name_32.kind === 69 /* Identifier */) {
-                                if (!hoistedVars) {
-                                    hoistedVars = [];
-                                }
-                                hoistedVars.push(name_32);
-                            }
-                            else {
-                                ts.forEachChild(name_32, visit);
-                            }
-                        }
-                        return;
-                    }
-                    if (ts.isInternalModuleImportEqualsDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
-                        if (!hoistedVars) {
-                            hoistedVars = [];
-                        }
-                        hoistedVars.push(node.name);
-                        return;
-                    }
-                    if (ts.isBindingPattern(node)) {
-                        ts.forEach(node.elements, visit);
-                        return;
-                    }
-                    if (!ts.isDeclaration(node)) {
-                        ts.forEachChild(node, visit);
-                    }
-                }
-            }
-            function shouldHoistVariable(node, checkIfSourceFileLevelDecl) {
-                if (checkIfSourceFileLevelDecl && !shouldHoistDeclarationInSystemJsModule(node)) {
-                    return false;
-                }
-                // hoist variable if
-                // - it is not block scoped
-                // - it is top level block scoped
-                // if block scoped variables are nested in some another block then
-                // no other functions can use them except ones that are defined at least in the same block
-                return (ts.getCombinedNodeFlags(node) & 3072 /* BlockScoped */) === 0 ||
-                    ts.getEnclosingBlockScopeContainer(node).kind === 256 /* SourceFile */;
-            }
-            function isCurrentFileSystemExternalModule() {
-                return modulekind === ts.ModuleKind.System && isCurrentFileExternalModule;
-            }
-            function emitSystemModuleBody(node, dependencyGroups, startIndex) {
-                // shape of the body in system modules:
-                // function (exports) {
-                //     <list of local aliases for imports>
-                //     <hoisted function declarations>
-                //     <hoisted variable declarations>
-                //     return {
-                //         setters: [
-                //             <list of setter function for imports>
-                //         ],
-                //         execute: function() {
-                //             <module statements>
-                //         }
-                //     }
-                //     <temp declarations>
-                // }
-                // I.e:
-                // import {x} from 'file1'
-                // var y = 1;
-                // export function foo() { return y + x(); }
-                // console.log(y);
-                // will be transformed to
-                // function(exports) {
-                //     var file1; // local alias
-                //     var y;
-                //     function foo() { return y + file1.x(); }
-                //     exports("foo", foo);
-                //     return {
-                //         setters: [
-                //             function(v) { file1 = v }
-                //         ],
-                //         execute(): function() {
-                //             y = 1;
-                //             console.log(y);
-                //         }
-                //     };
-                // }
-                emitVariableDeclarationsForImports();
-                writeLine();
-                var exportedDeclarations = processTopLevelVariableAndFunctionDeclarations(node);
-                var exportStarFunction = emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations);
-                writeLine();
-                write("return {");
-                increaseIndent();
-                writeLine();
-                emitSetters(exportStarFunction, dependencyGroups);
-                writeLine();
-                emitExecute(node, startIndex);
-                decreaseIndent();
-                writeLine();
-                write("}"); // return
-                emitTempDeclarations(/*newLine*/ true);
-            }
-            function emitSetters(exportStarFunction, dependencyGroups) {
-                write("setters:[");
-                for (var i = 0; i < dependencyGroups.length; i++) {
-                    if (i !== 0) {
-                        write(",");
-                    }
-                    writeLine();
-                    increaseIndent();
-                    var group = dependencyGroups[i];
-                    // derive a unique name for parameter from the first named entry in the group
-                    var parameterName = makeUniqueName(ts.forEach(group, getLocalNameForExternalImport) || "");
-                    write("function (" + parameterName + ") {");
-                    increaseIndent();
-                    for (var _a = 0, group_1 = group; _a < group_1.length; _a++) {
-                        var entry = group_1[_a];
-                        var importVariableName = getLocalNameForExternalImport(entry) || "";
-                        switch (entry.kind) {
-                            case 230 /* ImportDeclaration */:
-                                if (!entry.importClause) {
-                                    // 'import "..."' case
-                                    // module is imported only for side-effects, no emit required
-                                    break;
-                                }
-                            // fall-through
-                            case 229 /* ImportEqualsDeclaration */:
-                                ts.Debug.assert(importVariableName !== "");
-                                writeLine();
-                                // save import into the local
-                                write(importVariableName + " = " + parameterName + ";");
-                                writeLine();
-                                break;
-                            case 236 /* ExportDeclaration */:
-                                ts.Debug.assert(importVariableName !== "");
-                                if (entry.exportClause) {
-                                    // export {a, b as c} from 'foo'
-                                    // emit as:
-                                    // exports_({
-                                    //    "a": _["a"],
-                                    //    "c": _["b"]
-                                    // });
-                                    writeLine();
-                                    write(exportFunctionForFile + "({");
-                                    writeLine();
-                                    increaseIndent();
-                                    for (var i_1 = 0, len = entry.exportClause.elements.length; i_1 < len; i_1++) {
-                                        if (i_1 !== 0) {
-                                            write(",");
-                                            writeLine();
-                                        }
-                                        var e = entry.exportClause.elements[i_1];
-                                        write("\"");
-                                        emitNodeWithCommentsAndWithoutSourcemap(e.name);
-                                        write("\": " + parameterName + "[\"");
-                                        emitNodeWithCommentsAndWithoutSourcemap(e.propertyName || e.name);
-                                        write("\"]");
-                                    }
-                                    decreaseIndent();
-                                    writeLine();
-                                    write("});");
-                                }
-                                else {
-                                    // collectExternalModuleInfo prefilters star exports to keep only ones that export values
-                                    // this means that check 'resolver.moduleExportsSomeValue' is redundant and can be omitted here
-                                    writeLine();
-                                    // export * from 'foo'
-                                    // emit as:
-                                    // exportStar(_foo);
-                                    write(exportStarFunction + "(" + parameterName + ");");
-                                }
-                                writeLine();
-                                break;
-                        }
-                    }
-                    decreaseIndent();
-                    write("}");
-                    decreaseIndent();
-                }
-                write("],");
-            }
-            function emitExecute(node, startIndex) {
-                write("execute: function() {");
-                increaseIndent();
-                writeLine();
-                for (var i = startIndex; i < node.statements.length; i++) {
-                    var statement = node.statements[i];
-                    switch (statement.kind) {
-                        // - function declarations are not emitted because they were already hoisted
-                        // - import declarations are not emitted since they are already handled in setters
-                        // - export declarations with module specifiers are not emitted since they were already written in setters
-                        // - export declarations without module specifiers are emitted preserving the order
-                        case 220 /* FunctionDeclaration */:
-                        case 230 /* ImportDeclaration */:
-                            continue;
-                        case 236 /* ExportDeclaration */:
-                            if (!statement.moduleSpecifier) {
-                                for (var _a = 0, _b = statement.exportClause.elements; _a < _b.length; _a++) {
-                                    var element = _b[_a];
-                                    // write call to exporter function for every export specifier in exports list
-                                    emitExportSpecifierInSystemModule(element);
-                                }
-                            }
-                            continue;
-                        case 229 /* ImportEqualsDeclaration */:
-                            if (!ts.isInternalModuleImportEqualsDeclaration(statement)) {
-                                // - import equals declarations that import external modules are not emitted
-                                continue;
-                            }
-                        // fall-though for import declarations that import internal modules
-                        default:
-                            writeLine();
-                            emit(statement);
-                    }
-                }
-                decreaseIndent();
-                writeLine();
-                write("}"); // execute
-            }
-            function writeModuleName(node, emitRelativePathAsModuleName) {
-                var moduleName = node.moduleName;
-                if (moduleName || (emitRelativePathAsModuleName && (moduleName = getResolvedExternalModuleName(host, node)))) {
-                    write("\"" + moduleName + "\", ");
-                }
-            }
-            function emitSystemModule(node, emitRelativePathAsModuleName) {
-                collectExternalModuleInfo(node);
-                // System modules has the following shape
-                // System.register(['dep-1', ... 'dep-n'], function(exports) {/* module body function */})
-                // 'exports' here is a function 'exports<T>(name: string, value: T): T' that is used to publish exported values.
-                // 'exports' returns its 'value' argument so in most cases expressions
-                // that mutate exported values can be rewritten as:
-                // expr -> exports('name', expr).
-                // The only exception in this rule is postfix unary operators,
-                // see comment to 'emitPostfixUnaryExpression' for more details
-                ts.Debug.assert(!exportFunctionForFile);
-                // make sure that  name of 'exports' function does not conflict with existing identifiers
-                exportFunctionForFile = makeUniqueName("exports");
-                contextObjectForFile = makeUniqueName("context");
-                writeLine();
-                write("System.register(");
-                writeModuleName(node, emitRelativePathAsModuleName);
-                write("[");
-                var groupIndices = {};
-                var dependencyGroups = [];
-                for (var i = 0; i < externalImports.length; i++) {
-                    var text = getExternalModuleNameText(externalImports[i], emitRelativePathAsModuleName);
-                    if (text === undefined) {
-                        continue;
-                    }
-                    // text should be quoted string
-                    // for deduplication purposes in key remove leading and trailing quotes so 'a' and "a" will be considered the same
-                    var key = text.substr(1, text.length - 2);
-                    if (ts.hasProperty(groupIndices, key)) {
-                        // deduplicate/group entries in dependency list by the dependency name
-                        var groupIndex = groupIndices[key];
-                        dependencyGroups[groupIndex].push(externalImports[i]);
-                        continue;
-                    }
-                    else {
-                        groupIndices[key] = dependencyGroups.length;
-                        dependencyGroups.push([externalImports[i]]);
-                    }
-                    if (i !== 0) {
-                        write(", ");
-                    }
-                    write(text);
-                }
-                write("], function(" + exportFunctionForFile + ", " + contextObjectForFile + ") {");
-                writeLine();
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
-                writeLine();
-                write("var __moduleName = " + contextObjectForFile + " && " + contextObjectForFile + ".id;");
-                writeLine();
-                emitEmitHelpers(node);
-                emitCaptureThisForNodeIfNecessary(node);
-                emitSystemModuleBody(node, dependencyGroups, startIndex);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
-                // names of modules with corresponding parameter in the factory function
-                var aliasedModuleNames = [];
-                // names of modules with no corresponding parameters in factory function
-                var unaliasedModuleNames = [];
-                var importAliasNames = []; // names of the parameters in the factory function; these
-                // parameters need to match the indexes of the corresponding
-                // module names in aliasedModuleNames.
-                // Fill in amd-dependency tags
-                for (var _a = 0, _b = node.amdDependencies; _a < _b.length; _a++) {
-                    var amdDependency = _b[_a];
-                    if (amdDependency.name) {
-                        aliasedModuleNames.push('"' + amdDependency.path + '"');
-                        importAliasNames.push(amdDependency.name);
-                    }
-                    else {
-                        unaliasedModuleNames.push('"' + amdDependency.path + '"');
-                    }
-                }
-                for (var _c = 0, externalImports_4 = externalImports; _c < externalImports_4.length; _c++) {
-                    var importNode = externalImports_4[_c];
-                    // Find the name of the external module
-                    var externalModuleName = getExternalModuleNameText(importNode, emitRelativePathAsModuleName);
-                    // Find the name of the module alias, if there is one
-                    var importAliasName = getLocalNameForExternalImport(importNode);
-                    if (includeNonAmdDependencies && importAliasName) {
-                        aliasedModuleNames.push(externalModuleName);
-                        importAliasNames.push(importAliasName);
-                    }
-                    else {
-                        unaliasedModuleNames.push(externalModuleName);
-                    }
-                }
-                return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
-            }
-            function emitAMDDependencies(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
-                // An AMD define function has the following shape:
-                //     define(id?, dependencies?, factory);
-                //
-                // This has the shape of
-                //     define(name, ["module1", "module2"], function (module1Alias) {
-                // The location of the alias in the parameter list in the factory function needs to
-                // match the position of the module name in the dependency list.
-                //
-                // To ensure this is true in cases of modules with no aliases, e.g.:
-                // `import "module"` or `<amd-dependency path= "a.css" />`
-                // we need to add modules without alias names to the end of the dependencies list
-                var dependencyNames = getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName);
-                emitAMDDependencyList(dependencyNames);
-                write(", ");
-                emitAMDFactoryHeader(dependencyNames);
-            }
-            function emitAMDDependencyList(_a) {
-                var aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames;
-                write('["require", "exports"');
-                if (aliasedModuleNames.length) {
-                    write(", ");
-                    write(aliasedModuleNames.join(", "));
-                }
-                if (unaliasedModuleNames.length) {
-                    write(", ");
-                    write(unaliasedModuleNames.join(", "));
-                }
-                write("]");
-            }
-            function emitAMDFactoryHeader(_a) {
-                var importAliasNames = _a.importAliasNames;
-                write("function (require, exports");
-                if (importAliasNames.length) {
-                    write(", ");
-                    write(importAliasNames.join(", "));
-                }
-                write(") {");
-            }
-            function emitAMDModule(node, emitRelativePathAsModuleName) {
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                writeLine();
-                write("define(");
-                writeModuleName(node, emitRelativePathAsModuleName);
-                emitAMDDependencies(node, /*includeNonAmdDependencies*/ true, emitRelativePathAsModuleName);
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(/*emitAsReturn*/ true);
-                emitTempDeclarations(/*newLine*/ true);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function emitCommonJSModule(node) {
-                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(/*emitAsReturn*/ false);
-                emitTempDeclarations(/*newLine*/ true);
-            }
-            function emitUMDModule(node) {
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                var dependencyNames = getAMDDependencyNames(node, /*includeNonAmdDependencies*/ false);
-                // Module is detected first to support Browserify users that load into a browser with an AMD loader
-                writeLines("(function (factory) {\n    if (typeof module === 'object' && typeof module.exports === 'object') {\n        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n    }\n    else if (typeof define === 'function' && define.amd) {\n        define(");
-                emitAMDDependencyList(dependencyNames);
-                write(", factory);");
-                writeLines("    }\n})(");
-                emitAMDFactoryHeader(dependencyNames);
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(/*emitAsReturn*/ true);
-                emitTempDeclarations(/*newLine*/ true);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function emitES6Module(node) {
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false);
-                emitEmitHelpers(node);
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitTempDeclarations(/*newLine*/ true);
-                // Emit exportDefault if it exists will happen as part
-                // or normal statement emit.
-            }
-            function emitExportEquals(emitAsReturn) {
-                if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) {
-                    writeLine();
-                    emitStart(exportEquals);
-                    write(emitAsReturn ? "return " : "module.exports = ");
-                    emit(exportEquals.expression);
-                    write(";");
-                    emitEnd(exportEquals);
-                }
-            }
-            function emitJsxElement(node) {
-                switch (compilerOptions.jsx) {
-                    case 2 /* React */:
-                        jsxEmitReact(node);
-                        break;
-                    case 1 /* Preserve */:
-                    // Fall back to preserve if None was specified (we'll error earlier)
-                    default:
-                        jsxEmitPreserve(node);
-                        break;
-                }
-            }
-            function trimReactWhitespaceAndApplyEntities(node) {
-                var result = undefined;
-                var text = ts.getTextOfNode(node, /*includeTrivia*/ true);
-                var firstNonWhitespace = 0;
-                var lastNonWhitespace = -1;
-                // JSX trims whitespace at the end and beginning of lines, except that the
-                // start/end of a tag is considered a start/end of a line only if that line is
-                // on the same line as the closing tag. See examples in tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx
-                for (var i = 0; i < text.length; i++) {
-                    var c = text.charCodeAt(i);
-                    if (ts.isLineBreak(c)) {
-                        if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) {
-                            var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1);
-                            result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
-                        }
-                        firstNonWhitespace = -1;
-                    }
-                    else if (!ts.isWhiteSpace(c)) {
-                        lastNonWhitespace = i;
-                        if (firstNonWhitespace === -1) {
-                            firstNonWhitespace = i;
-                        }
-                    }
-                }
-                if (firstNonWhitespace !== -1) {
-                    var part = text.substr(firstNonWhitespace);
-                    result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
-                }
-                if (result) {
-                    // Replace entities like &nbsp;
-                    result = result.replace(/&(\w+);/g, function (s, m) {
-                        if (entities[m] !== undefined) {
-                            var ch = String.fromCharCode(entities[m]);
-                            // &quot; needs to be escaped
-                            return ch === '"' ? "\\\"" : ch;
-                        }
-                        else {
-                            return s;
-                        }
-                    });
-                }
-                return result;
-            }
-            function isJsxChildEmittable(child) {
-                if (child.kind === 248 /* JsxExpression */) {
-                    // Don't emit empty expressions
-                    return !!child.expression;
-                }
-                else if (child.kind === 244 /* JsxText */) {
-                    // Don't emit empty strings
-                    return !!getTextToEmit(child);
-                }
-                return true;
-            }
-            ;
-            function getTextToEmit(node) {
-                switch (compilerOptions.jsx) {
-                    case 2 /* React */:
-                        var text = trimReactWhitespaceAndApplyEntities(node);
-                        if (text === undefined || text.length === 0) {
-                            return undefined;
-                        }
-                        else {
-                            return text;
-                        }
-                    case 1 /* Preserve */:
-                    default:
-                        return ts.getTextOfNode(node, /*includeTrivia*/ true);
-                }
-            }
-            function emitJsxText(node) {
-                switch (compilerOptions.jsx) {
-                    case 2 /* React */:
-                        write('"');
-                        write(trimReactWhitespaceAndApplyEntities(node));
-                        write('"');
-                        break;
-                    case 1 /* Preserve */:
-                    default:
-                        writer.writeLiteral(ts.getTextOfNode(node, /*includeTrivia*/ true));
-                        break;
-                }
-            }
-            function emitJsxExpression(node) {
-                if (node.expression) {
-                    switch (compilerOptions.jsx) {
-                        case 1 /* Preserve */:
-                        default:
-                            write("{");
-                            emit(node.expression);
-                            write("}");
-                            break;
-                        case 2 /* React */:
-                            emit(node.expression);
-                            break;
-                    }
-                }
-            }
-            function isUseStrictPrologue(node) {
-                return node.expression.text === "use strict";
-            }
-            function ensureUseStrictPrologue(startWithNewLine, writeUseStrict) {
-                if (writeUseStrict) {
-                    if (startWithNewLine) {
-                        writeLine();
-                    }
-                    write("\"use strict\";");
-                }
-            }
-            function emitDirectivePrologues(statements, startWithNewLine, ensureUseStrict) {
-                var foundUseStrict = false;
-                for (var i = 0; i < statements.length; i++) {
-                    if (ts.isPrologueDirective(statements[i])) {
-                        if (isUseStrictPrologue(statements[i])) {
-                            foundUseStrict = true;
-                        }
-                        if (startWithNewLine || i > 0) {
-                            writeLine();
-                        }
-                        emit(statements[i]);
-                    }
-                    else {
-                        ensureUseStrictPrologue(startWithNewLine || i > 0, !foundUseStrict && ensureUseStrict);
-                        // return index of the first non prologue directive
-                        return i;
-                    }
-                }
-                ensureUseStrictPrologue(startWithNewLine, !foundUseStrict && ensureUseStrict);
-                return statements.length;
-            }
-            function writeLines(text) {
-                var lines = text.split(/\r\n|\r|\n/g);
-                for (var i = 0; i < lines.length; i++) {
-                    var line = lines[i];
-                    if (line.length) {
-                        writeLine();
-                        write(line);
-                    }
-                }
-            }
-            function emitEmitHelpers(node) {
-                // Only emit helpers if the user did not say otherwise.
-                if (!compilerOptions.noEmitHelpers) {
-                    // Only Emit __extends function when target ES5.
-                    // For target ES6 and above, we can emit classDeclaration as is.
-                    if (languageVersion < 2 /* ES6 */ && !extendsEmitted && node.flags & 262144 /* HasClassExtends */) {
-                        writeLines(extendsHelper);
-                        extendsEmitted = true;
-                    }
-                    if (compilerOptions.jsx !== 1 /* Preserve */ && !assignEmitted && (node.flags & 1073741824 /* HasJsxSpreadAttribute */)) {
-                        writeLines(assignHelper);
-                        assignEmitted = true;
-                    }
-                    if (!decorateEmitted && node.flags & 524288 /* HasDecorators */) {
-                        writeLines(decorateHelper);
-                        if (compilerOptions.emitDecoratorMetadata) {
-                            writeLines(metadataHelper);
-                        }
-                        decorateEmitted = true;
-                    }
-                    if (!paramEmitted && node.flags & 1048576 /* HasParamDecorators */) {
-                        writeLines(paramHelper);
-                        paramEmitted = true;
-                    }
-                    if (!awaiterEmitted && node.flags & 2097152 /* HasAsyncFunctions */) {
-                        writeLines(awaiterHelper);
-                        awaiterEmitted = true;
-                    }
-                }
-            }
-            function emitSourceFileNode(node) {
-                // Start new file on new line
-                writeLine();
-                emitShebang();
-                emitDetachedCommentsAndUpdateCommentsInfo(node);
-                if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
-                    if (isOwnFileEmit || (!ts.isExternalModule(node) && compilerOptions.isolatedModules)) {
-                        var emitModule = moduleEmitDelegates[modulekind] || moduleEmitDelegates[ts.ModuleKind.CommonJS];
-                        emitModule(node);
-                    }
-                    else {
-                        bundleEmitDelegates[modulekind](node, /*emitRelativePathAsModuleName*/ true);
-                    }
-                }
-                else {
-                    // emit prologue directives prior to __extends
-                    var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false);
-                    externalImports = undefined;
-                    exportSpecifiers = undefined;
-                    exportEquals = undefined;
-                    hasExportStarsToExportValues = false;
-                    emitEmitHelpers(node);
-                    emitCaptureThisForNodeIfNecessary(node);
-                    emitLinesStartingAt(node.statements, startIndex);
-                    emitTempDeclarations(/*newLine*/ true);
-                }
-                emitLeadingComments(node.endOfFileToken);
-            }
-            function emit(node) {
-                emitNodeConsideringCommentsOption(node, emitNodeWithSourceMap);
-            }
-            function emitNodeWithCommentsAndWithoutSourcemap(node) {
-                emitNodeConsideringCommentsOption(node, emitNodeWithoutSourceMap);
-            }
-            function emitNodeConsideringCommentsOption(node, emitNodeConsideringSourcemap) {
-                if (node) {
-                    if (node.flags & 2 /* Ambient */) {
-                        return emitCommentsOnNotEmittedNode(node);
-                    }
-                    if (isSpecializedCommentHandling(node)) {
-                        // This is the node that will handle its own comments and sourcemap
-                        return emitNodeWithoutSourceMap(node);
-                    }
-                    var emitComments_1 = shouldEmitLeadingAndTrailingComments(node);
-                    if (emitComments_1) {
-                        emitLeadingComments(node);
-                    }
-                    emitNodeConsideringSourcemap(node);
-                    if (emitComments_1) {
-                        emitTrailingComments(node);
-                    }
-                }
-            }
-            function emitNodeWithSourceMap(node) {
-                if (node) {
-                    emitStart(node);
-                    emitNodeWithoutSourceMap(node);
-                    emitEnd(node);
-                }
-            }
-            function emitNodeWithoutSourceMap(node) {
-                if (node) {
-                    emitJavaScriptWorker(node);
-                }
-            }
-            function changeSourceMapEmit(writer) {
-                sourceMap = writer;
-                emitStart = writer.emitStart;
-                emitEnd = writer.emitEnd;
-                emitPos = writer.emitPos;
-                setSourceFile = writer.setSourceFile;
-            }
-            function withTemporaryNoSourceMap(callback) {
-                var prevSourceMap = sourceMap;
-                setSourceMapWriterEmit(ts.getNullSourceMapWriter());
-                callback();
-                setSourceMapWriterEmit(prevSourceMap);
-            }
-            function isSpecializedCommentHandling(node) {
-                switch (node.kind) {
-                    // All of these entities are emitted in a specialized fashion.  As such, we allow
-                    // the specialized methods for each to handle the comments on the nodes.
-                    case 222 /* InterfaceDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                    case 230 /* ImportDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 235 /* ExportAssignment */:
-                        return true;
-                }
-            }
-            function shouldEmitLeadingAndTrailingComments(node) {
-                switch (node.kind) {
-                    case 200 /* VariableStatement */:
-                        return shouldEmitLeadingAndTrailingCommentsForVariableStatement(node);
-                    case 225 /* ModuleDeclaration */:
-                        // Only emit the leading/trailing comments for a module if we're actually
-                        // emitting the module as well.
-                        return shouldEmitModuleDeclaration(node);
-                    case 224 /* EnumDeclaration */:
-                        // Only emit the leading/trailing comments for an enum if we're actually
-                        // emitting the module as well.
-                        return shouldEmitEnumDeclaration(node);
-                }
-                // If the node is emitted in specialized fashion, dont emit comments as this node will handle
-                // emitting comments when emitting itself
-                ts.Debug.assert(!isSpecializedCommentHandling(node));
-                // If this is the expression body of an arrow function that we're down-leveling,
-                // then we don't want to emit comments when we emit the body.  It will have already
-                // been taken care of when we emitted the 'return' statement for the function
-                // expression body.
-                if (node.kind !== 199 /* Block */ &&
-                    node.parent &&
-                    node.parent.kind === 180 /* ArrowFunction */ &&
-                    node.parent.body === node &&
-                    languageVersion <= 1 /* ES5 */) {
-                    return false;
-                }
-                // Emit comments for everything else.
-                return true;
-            }
-            function emitJavaScriptWorker(node) {
-                // Check if the node can be emitted regardless of the ScriptTarget
-                switch (node.kind) {
-                    case 69 /* Identifier */:
-                        return emitIdentifier(node);
-                    case 142 /* Parameter */:
-                        return emitParameter(node);
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        return emitMethod(node);
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        return emitAccessor(node);
-                    case 97 /* ThisKeyword */:
-                        return emitThis(node);
-                    case 95 /* SuperKeyword */:
-                        return emitSuper(node);
-                    case 93 /* NullKeyword */:
-                        return write("null");
-                    case 99 /* TrueKeyword */:
-                        return write("true");
-                    case 84 /* FalseKeyword */:
-                        return write("false");
-                    case 8 /* NumericLiteral */:
-                    case 9 /* StringLiteral */:
-                    case 10 /* RegularExpressionLiteral */:
-                    case 11 /* NoSubstitutionTemplateLiteral */:
-                    case 12 /* TemplateHead */:
-                    case 13 /* TemplateMiddle */:
-                    case 14 /* TemplateTail */:
-                        return emitLiteral(node);
-                    case 189 /* TemplateExpression */:
-                        return emitTemplateExpression(node);
-                    case 197 /* TemplateSpan */:
-                        return emitTemplateSpan(node);
-                    case 241 /* JsxElement */:
-                    case 242 /* JsxSelfClosingElement */:
-                        return emitJsxElement(node);
-                    case 244 /* JsxText */:
-                        return emitJsxText(node);
-                    case 248 /* JsxExpression */:
-                        return emitJsxExpression(node);
-                    case 139 /* QualifiedName */:
-                        return emitQualifiedName(node);
-                    case 167 /* ObjectBindingPattern */:
-                        return emitObjectBindingPattern(node);
-                    case 168 /* ArrayBindingPattern */:
-                        return emitArrayBindingPattern(node);
-                    case 169 /* BindingElement */:
-                        return emitBindingElement(node);
-                    case 170 /* ArrayLiteralExpression */:
-                        return emitArrayLiteral(node);
-                    case 171 /* ObjectLiteralExpression */:
-                        return emitObjectLiteral(node);
-                    case 253 /* PropertyAssignment */:
-                        return emitPropertyAssignment(node);
-                    case 254 /* ShorthandPropertyAssignment */:
-                        return emitShorthandPropertyAssignment(node);
-                    case 140 /* ComputedPropertyName */:
-                        return emitComputedPropertyName(node);
-                    case 172 /* PropertyAccessExpression */:
-                        return emitPropertyAccess(node);
-                    case 173 /* ElementAccessExpression */:
-                        return emitIndexedAccess(node);
-                    case 174 /* CallExpression */:
-                        return emitCallExpression(node);
-                    case 175 /* NewExpression */:
-                        return emitNewExpression(node);
-                    case 176 /* TaggedTemplateExpression */:
-                        return emitTaggedTemplateExpression(node);
-                    case 177 /* TypeAssertionExpression */:
-                    case 195 /* AsExpression */:
-                    case 196 /* NonNullExpression */:
-                        return emit(node.expression);
-                    case 178 /* ParenthesizedExpression */:
-                        return emitParenExpression(node);
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                        return emitFunctionDeclaration(node);
-                    case 181 /* DeleteExpression */:
-                        return emitDeleteExpression(node);
-                    case 182 /* TypeOfExpression */:
-                        return emitTypeOfExpression(node);
-                    case 183 /* VoidExpression */:
-                        return emitVoidExpression(node);
-                    case 184 /* AwaitExpression */:
-                        return emitAwaitExpression(node);
-                    case 185 /* PrefixUnaryExpression */:
-                        return emitPrefixUnaryExpression(node);
-                    case 186 /* PostfixUnaryExpression */:
-                        return emitPostfixUnaryExpression(node);
-                    case 187 /* BinaryExpression */:
-                        return emitBinaryExpression(node);
-                    case 188 /* ConditionalExpression */:
-                        return emitConditionalExpression(node);
-                    case 191 /* SpreadElementExpression */:
-                        return emitSpreadElementExpression(node);
-                    case 190 /* YieldExpression */:
-                        return emitYieldExpression(node);
-                    case 193 /* OmittedExpression */:
-                        return;
-                    case 199 /* Block */:
-                    case 226 /* ModuleBlock */:
-                        return emitBlock(node);
-                    case 200 /* VariableStatement */:
-                        return emitVariableStatement(node);
-                    case 201 /* EmptyStatement */:
-                        return write(";");
-                    case 202 /* ExpressionStatement */:
-                        return emitExpressionStatement(node);
-                    case 203 /* IfStatement */:
-                        return emitIfStatement(node);
-                    case 204 /* DoStatement */:
-                        return emitDoStatement(node);
-                    case 205 /* WhileStatement */:
-                        return emitWhileStatement(node);
-                    case 206 /* ForStatement */:
-                        return emitForStatement(node);
-                    case 208 /* ForOfStatement */:
-                    case 207 /* ForInStatement */:
-                        return emitForInOrForOfStatement(node);
-                    case 209 /* ContinueStatement */:
-                    case 210 /* BreakStatement */:
-                        return emitBreakOrContinueStatement(node);
-                    case 211 /* ReturnStatement */:
-                        return emitReturnStatement(node);
-                    case 212 /* WithStatement */:
-                        return emitWithStatement(node);
-                    case 213 /* SwitchStatement */:
-                        return emitSwitchStatement(node);
-                    case 249 /* CaseClause */:
-                    case 250 /* DefaultClause */:
-                        return emitCaseOrDefaultClause(node);
-                    case 214 /* LabeledStatement */:
-                        return emitLabeledStatement(node);
-                    case 215 /* ThrowStatement */:
-                        return emitThrowStatement(node);
-                    case 216 /* TryStatement */:
-                        return emitTryStatement(node);
-                    case 252 /* CatchClause */:
-                        return emitCatchClause(node);
-                    case 217 /* DebuggerStatement */:
-                        return emitDebuggerStatement(node);
-                    case 218 /* VariableDeclaration */:
-                        return emitVariableDeclaration(node);
-                    case 192 /* ClassExpression */:
-                        return emitClassExpression(node);
-                    case 221 /* ClassDeclaration */:
-                        return emitClassDeclaration(node);
-                    case 222 /* InterfaceDeclaration */:
-                        return emitInterfaceDeclaration(node);
-                    case 224 /* EnumDeclaration */:
-                        return emitEnumDeclaration(node);
-                    case 255 /* EnumMember */:
-                        return emitEnumMember(node);
-                    case 225 /* ModuleDeclaration */:
-                        return emitModuleDeclaration(node);
-                    case 230 /* ImportDeclaration */:
-                        return emitImportDeclaration(node);
-                    case 229 /* ImportEqualsDeclaration */:
-                        return emitImportEqualsDeclaration(node);
-                    case 236 /* ExportDeclaration */:
-                        return emitExportDeclaration(node);
-                    case 235 /* ExportAssignment */:
-                        return emitExportAssignment(node);
-                    case 256 /* SourceFile */:
-                        return emitSourceFileNode(node);
-                }
-            }
-            function hasDetachedComments(pos) {
-                return detachedCommentsInfo !== undefined && ts.lastOrUndefined(detachedCommentsInfo).nodePos === pos;
-            }
-            function getLeadingCommentsWithoutDetachedComments() {
-                // get the leading comments from detachedPos
-                var leadingComments = ts.getLeadingCommentRanges(currentText, ts.lastOrUndefined(detachedCommentsInfo).detachedCommentEndPos);
-                if (detachedCommentsInfo.length - 1) {
-                    detachedCommentsInfo.pop();
-                }
-                else {
-                    detachedCommentsInfo = undefined;
-                }
-                return leadingComments;
-            }
-            /**
-             * Determine if the given comment is a triple-slash
-             *
-             * @return true if the comment is a triple-slash comment else false
-             **/
-            function isTripleSlashComment(comment) {
-                // Verify this is /// comment, but do the regexp match only when we first can find /// in the comment text
-                // so that we don't end up computing comment string and doing match for all // comments
-                if (currentText.charCodeAt(comment.pos + 1) === 47 /* slash */ &&
-                    comment.pos + 2 < comment.end &&
-                    currentText.charCodeAt(comment.pos + 2) === 47 /* slash */) {
-                    var textSubStr = currentText.substring(comment.pos, comment.end);
-                    return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) ||
-                        textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ?
-                        true : false;
-                }
-                return false;
-            }
-            function getLeadingCommentsToEmit(node) {
-                // Emit the leading comments only if the parent's pos doesn't match because parent should take care of emitting these comments
-                if (node.parent) {
-                    if (node.parent.kind === 256 /* SourceFile */ || node.pos !== node.parent.pos) {
-                        if (hasDetachedComments(node.pos)) {
-                            // get comments without detached comments
-                            return getLeadingCommentsWithoutDetachedComments();
-                        }
-                        else {
-                            // get the leading comments from the node
-                            return ts.getLeadingCommentRangesOfNodeFromText(node, currentText);
-                        }
-                    }
-                }
-            }
-            function getTrailingCommentsToEmit(node) {
-                // Emit the trailing comments only if the parent's pos doesn't match because parent should take care of emitting these comments
-                if (node.parent) {
-                    if (node.parent.kind === 256 /* SourceFile */ || node.end !== node.parent.end) {
-                        return ts.getTrailingCommentRanges(currentText, node.end);
-                    }
-                }
-            }
-            /**
-             * Emit comments associated with node that will not be emitted into JS file
-             */
-            function emitCommentsOnNotEmittedNode(node) {
-                emitLeadingCommentsWorker(node, /*isEmittedNode*/ false);
-            }
-            function emitLeadingComments(node) {
-                return emitLeadingCommentsWorker(node, /*isEmittedNode*/ true);
-            }
-            function emitLeadingCommentsWorker(node, isEmittedNode) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var leadingComments;
-                if (isEmittedNode) {
-                    leadingComments = getLeadingCommentsToEmit(node);
-                }
-                else {
-                    // If the node will not be emitted in JS, remove all the comments(normal, pinned and ///) associated with the node,
-                    // unless it is a triple slash comment at the top of the file.
-                    // For Example:
-                    //      /// <reference-path ...>
-                    //      declare var x;
-                    //      /// <reference-path ...>
-                    //      interface F {}
-                    //  The first /// will NOT be removed while the second one will be removed even though both node will not be emitted
-                    if (node.pos === 0) {
-                        leadingComments = ts.filter(getLeadingCommentsToEmit(node), isTripleSlashComment);
-                    }
-                }
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, node, leadingComments);
-                // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
-                ts.emitComments(currentText, currentLineMap, writer, leadingComments, /*trailingSeparator*/ true, newLine, writeComment);
-            }
-            function emitTrailingComments(node) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                // Emit the trailing comments only if the parent's end doesn't match
-                var trailingComments = getTrailingCommentsToEmit(node);
-                // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment*/
-                ts.emitComments(currentText, currentLineMap, writer, trailingComments, /*trailingSeparator*/ false, newLine, writeComment);
-            }
-            /**
-             * Emit trailing comments at the position. The term trailing comment is used here to describe following comment:
-             *      x, /comment1/ y
-             *        ^ => pos; the function will emit "comment1" in the emitJS
-             */
-            function emitTrailingCommentsOfPosition(pos) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var trailingComments = ts.getTrailingCommentRanges(currentText, pos);
-                // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment*/
-                ts.emitComments(currentText, currentLineMap, writer, trailingComments, /*trailingSeparator*/ true, newLine, writeComment);
-            }
-            function emitLeadingCommentsOfPositionWorker(pos) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var leadingComments;
-                if (hasDetachedComments(pos)) {
-                    // get comments without detached comments
-                    leadingComments = getLeadingCommentsWithoutDetachedComments();
-                }
-                else {
-                    // get the leading comments from the node
-                    leadingComments = ts.getLeadingCommentRanges(currentText, pos);
-                }
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, { pos: pos, end: pos }, leadingComments);
-                // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
-                ts.emitComments(currentText, currentLineMap, writer, leadingComments, /*trailingSeparator*/ true, newLine, writeComment);
-            }
-            function emitDetachedCommentsAndUpdateCommentsInfo(node) {
-                var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, node, newLine, compilerOptions.removeComments);
-                if (currentDetachedCommentInfo) {
-                    if (detachedCommentsInfo) {
-                        detachedCommentsInfo.push(currentDetachedCommentInfo);
-                    }
-                    else {
-                        detachedCommentsInfo = [currentDetachedCommentInfo];
-                    }
-                }
-            }
-            function writeComment(text, lineMap, writer, comment, newLine) {
-                emitPos(comment.pos);
-                ts.writeCommentRange(text, lineMap, writer, comment, newLine);
-                emitPos(comment.end);
-            }
-            function emitShebang() {
-                var shebang = ts.getShebang(currentText);
-                if (shebang) {
-                    write(shebang);
-                    writeLine();
-                }
-            }
-            var _a, _b;
-        }
-        function emitFile(_a, sourceFiles, isBundledEmit) {
-            var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath;
-            // Make sure not to write js File and source map file if any of them cannot be written
-            if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
-                emitJavaScript(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
-            }
-            else {
-                emitSkipped = true;
-            }
-            if (declarationFilePath) {
-                emitSkipped = ts.writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) || emitSkipped;
-            }
-            if (!emitSkipped && emittedFilesList) {
-                emittedFilesList.push(jsFilePath);
-                if (sourceMapFilePath) {
-                    emittedFilesList.push(sourceMapFilePath);
-                }
-                if (declarationFilePath) {
-                    emittedFilesList.push(declarationFilePath);
-                }
-            }
-        }
-    }
-    ts.emitFiles = emitFiles;
-})(ts || (ts = {}));
-/// <reference path="sys.ts" />
-/// <reference path="emitter.ts" />
-/// <reference path="core.ts" />
-var ts;
-(function (ts) {
-    /* @internal */ ts.programTime = 0;
-    /* @internal */ ts.emitTime = 0;
-    /* @internal */ ts.ioReadTime = 0;
-    /* @internal */ ts.ioWriteTime = 0;
-    /** The version of the TypeScript compiler release */
-    var emptyArray = [];
-    var defaultLibrarySearchPaths = [
-        "types/",
-        "node_modules/",
-        "node_modules/@types/",
-    ];
-    ts.version = "1.9.0";
-    function findConfigFile(searchPath, fileExists) {
-        while (true) {
-            var fileName = ts.combinePaths(searchPath, "tsconfig.json");
-            if (fileExists(fileName)) {
-                return fileName;
-            }
-            var parentPath = ts.getDirectoryPath(searchPath);
-            if (parentPath === searchPath) {
-                break;
-            }
-            searchPath = parentPath;
-        }
-        return undefined;
-    }
-    ts.findConfigFile = findConfigFile;
-    function resolveTripleslashReference(moduleName, containingFile) {
-        var basePath = ts.getDirectoryPath(containingFile);
-        var referencedFileName = ts.isRootedDiskPath(moduleName) ? moduleName : ts.combinePaths(basePath, moduleName);
-        return ts.normalizePath(referencedFileName);
-    }
-    ts.resolveTripleslashReference = resolveTripleslashReference;
-    /* @internal */
-    function computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName) {
-        var commonPathComponents;
-        var failed = ts.forEach(fileNames, function (sourceFile) {
-            // Each file contributes into common source file path
-            var sourcePathComponents = ts.getNormalizedPathComponents(sourceFile, currentDirectory);
-            sourcePathComponents.pop(); // The base file name is not part of the common directory path
-            if (!commonPathComponents) {
-                // first file
-                commonPathComponents = sourcePathComponents;
-                return;
-            }
-            for (var i = 0, n = Math.min(commonPathComponents.length, sourcePathComponents.length); i < n; i++) {
-                if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
-                    if (i === 0) {
-                        // Failed to find any common path component
-                        return true;
-                    }
-                    // New common path found that is 0 -> i-1
-                    commonPathComponents.length = i;
-                    break;
-                }
-            }
-            // If the sourcePathComponents was shorter than the commonPathComponents, truncate to the sourcePathComponents
-            if (sourcePathComponents.length < commonPathComponents.length) {
-                commonPathComponents.length = sourcePathComponents.length;
-            }
-        });
-        // A common path can not be found when paths span multiple drives on windows, for example
-        if (failed) {
-            return "";
-        }
-        if (!commonPathComponents) {
-            return currentDirectory;
-        }
-        return ts.getNormalizedPathFromPathComponents(commonPathComponents);
-    }
-    ts.computeCommonSourceDirectoryOfFilenames = computeCommonSourceDirectoryOfFilenames;
-    function trace(host, message) {
-        host.trace(ts.formatMessage.apply(undefined, arguments));
-    }
-    function isTraceEnabled(compilerOptions, host) {
-        return compilerOptions.traceResolution && host.trace !== undefined;
-    }
-    function hasZeroOrOneAsteriskCharacter(str) {
-        var seenAsterisk = false;
-        for (var i = 0; i < str.length; i++) {
-            if (str.charCodeAt(i) === 42 /* asterisk */) {
-                if (!seenAsterisk) {
-                    seenAsterisk = true;
-                }
-                else {
-                    // have already seen asterisk
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-    function createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations) {
-        return { resolvedModule: resolvedFileName ? { resolvedFileName: resolvedFileName, isExternalLibraryImport: isExternalLibraryImport } : undefined, failedLookupLocations: failedLookupLocations };
-    }
-    function moduleHasNonRelativeName(moduleName) {
-        if (ts.isRootedDiskPath(moduleName)) {
-            return false;
-        }
-        var i = moduleName.lastIndexOf("./", 1);
-        var startsWithDotSlashOrDotDotSlash = i === 0 || (i === 1 && moduleName.charCodeAt(0) === 46 /* dot */);
-        return !startsWithDotSlashOrDotDotSlash;
-    }
-    function tryReadTypesSection(packageJsonPath, baseDirectory, state) {
-        var jsonContent;
-        try {
-            var jsonText = state.host.readFile(packageJsonPath);
-            jsonContent = jsonText ? JSON.parse(jsonText) : {};
-        }
-        catch (e) {
-            // gracefully handle if readFile fails or returns not JSON
-            jsonContent = {};
-        }
-        var typesFile;
-        var fieldName;
-        // first try to read content of 'typings' section (backward compatibility)
-        if (jsonContent.typings) {
-            if (typeof jsonContent.typings === "string") {
-                fieldName = "typings";
-                typesFile = jsonContent.typings;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "typings", typeof jsonContent.typings);
-                }
-            }
-        }
-        // then read 'types'
-        if (!typesFile && jsonContent.types) {
-            if (typeof jsonContent.types === "string") {
-                fieldName = "types";
-                typesFile = jsonContent.types;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "types", typeof jsonContent.types);
-                }
-            }
-        }
-        if (typesFile) {
-            var typesFilePath = ts.normalizePath(ts.combinePaths(baseDirectory, typesFile));
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, typesFile, typesFilePath);
-            }
-            return typesFilePath;
-        }
-        return undefined;
-    }
-    var typeReferenceExtensions = [".d.ts"];
-    /**
-     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
-     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
-     * is assumed to be the same as root directory of the project.
-     */
-    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
-        var traceEnabled = isTraceEnabled(options, host);
-        var moduleResolutionState = {
-            compilerOptions: options,
-            host: host,
-            skipTsx: true,
-            traceEnabled: traceEnabled
-        };
-        // use typesRoot and fallback to directory that contains tsconfig or current directory if typesRoot is not set
-        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
-        if (traceEnabled) {
-            if (containingFile === undefined) {
-                if (rootDir === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, rootDir);
-                }
-            }
-            else {
-                if (rootDir === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, rootDir);
-                }
-            }
-        }
-        var failedLookupLocations = [];
-        // Check primary library paths
-        if (rootDir !== undefined) {
-            var effectivePrimarySearchPaths = options.typesSearchPaths || defaultLibrarySearchPaths;
-            for (var _i = 0, effectivePrimarySearchPaths_1 = effectivePrimarySearchPaths; _i < effectivePrimarySearchPaths_1.length; _i++) {
-                var searchPath = effectivePrimarySearchPaths_1[_i];
-                var primaryPath = ts.combinePaths(rootDir, searchPath);
-                if (traceEnabled) {
-                    trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, primaryPath);
-                }
-                var candidate = ts.combinePaths(primaryPath, typeReferenceDirectiveName);
-                var candidateDirectory = ts.getDirectoryPath(candidate);
-                var resolvedFile_1 = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations, !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
-                if (resolvedFile_1) {
-                    if (traceEnabled) {
-                        trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile_1, true);
-                    }
-                    return {
-                        resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile_1 },
-                        failedLookupLocations: failedLookupLocations
-                    };
-                }
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
-            }
-        }
-        var resolvedFile;
-        var initialLocationForSecondaryLookup;
-        if (containingFile) {
-            initialLocationForSecondaryLookup = ts.getDirectoryPath(containingFile);
-        }
-        else {
-            initialLocationForSecondaryLookup = rootDir;
-        }
-        if (initialLocationForSecondaryLookup !== undefined) {
-            // check secondary locations
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
-            }
-            resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState);
-            if (traceEnabled) {
-                if (resolvedFile) {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
-                }
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
-            }
-        }
-        return {
-            resolvedTypeReferenceDirective: resolvedFile
-                ? { primary: false, resolvedFileName: resolvedFile }
-                : undefined,
-            failedLookupLocations: failedLookupLocations
-        };
-    }
-    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
-    function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        if (traceEnabled) {
-            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
-        }
-        var moduleResolution = compilerOptions.moduleResolution;
-        if (moduleResolution === undefined) {
-            moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
-            }
-        }
-        var result;
-        switch (moduleResolution) {
-            case ts.ModuleResolutionKind.NodeJs:
-                result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-            case ts.ModuleResolutionKind.Classic:
-                result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-        }
-        if (traceEnabled) {
-            if (result.resolvedModule) {
-                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
-            }
-            else {
-                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
-            }
-        }
-        return result;
-    }
-    ts.resolveModuleName = resolveModuleName;
-    /**
-     * Any module resolution kind can be augmented with optional settings: 'baseUrl', 'paths' and 'rootDirs' - they are used to
-     * mitigate differences between design time structure of the project and its runtime counterpart so the same import name
-     * can be resolved successfully by TypeScript compiler and runtime module loader.
-     * If these settings are set then loading procedure will try to use them to resolve module name and it can of failure it will
-     * fallback to standard resolution routine.
-     *
-     * - baseUrl - this setting controls how non-relative module names are resolved. If this setting is specified then non-relative
-     * names will be resolved relative to baseUrl: i.e. if baseUrl is '/a/b' then candidate location to resolve module name 'c/d' will
-     * be '/a/b/c/d'
-     * - paths - this setting can only be used when baseUrl is specified. allows to tune how non-relative module names
-     * will be resolved based on the content of the module name.
-     * Structure of 'paths' compiler options
-     * 'paths': {
-     *    pattern-1: [...substitutions],
-     *    pattern-2: [...substitutions],
-     *    ...
-     *    pattern-n: [...substitutions]
-     * }
-     * Pattern here is a string that can contain zero or one '*' character. During module resolution module name will be matched against
-     * all patterns in the list. Matching for patterns that don't contain '*' means that module name must be equal to pattern respecting the case.
-     * If pattern contains '*' then to match pattern "<prefix>*<suffix>" module name must start with the <prefix> and end with <suffix>.
-     * <MatchedStar> denotes part of the module name between <prefix> and <suffix>.
-     * If module name can be matches with multiple patterns then pattern with the longest prefix will be picked.
-     * After selecting pattern we'll use list of substitutions to get candidate locations of the module and the try to load module
-     * from the candidate location.
-     * Substitution is a string that can contain zero or one '*'. To get candidate location from substitution we'll pick every
-     * substitution in the list and replace '*' with <MatchedStar> string. If candidate location is not rooted it
-     * will be converted to absolute using baseUrl.
-     * For example:
-     * baseUrl: /a/b/c
-     * "paths": {
-     *     // match all module names
-     *     "*": [
-     *         "*",        // use matched name as is,
-     *                     // <matched name> will be looked as /a/b/c/<matched name>
-     *
-     *         "folder1/*" // substitution will convert matched name to 'folder1/<matched name>',
-     *                     // since it is not rooted then final candidate location will be /a/b/c/folder1/<matched name>
-     *     ],
-     *     // match module names that start with 'components/'
-     *     "components/*": [ "/root/components/*" ] // substitution will convert /components/folder1/<matched name> to '/root/components/folder1/<matched name>',
-     *                                              // it is rooted so it will be final candidate location
-     * }
-     *
-     * 'rootDirs' allows the project to be spreaded across multiple locations and resolve modules with relative names as if
-     * they were in the same location. For example lets say there are two files
-     * '/local/src/content/file1.ts'
-     * '/shared/components/contracts/src/content/protocols/file2.ts'
-     * After bundling content of '/shared/components/contracts/src' will be merged with '/local/src' so
-     * if file1 has the following import 'import {x} from "./protocols/file2"' it will be resolved successfully in runtime.
-     * 'rootDirs' provides the way to tell compiler that in order to get the whole project it should behave as if content of all
-     * root dirs were merged together.
-     * I.e. for the example above 'rootDirs' will have two entries: [ '/local/src', '/shared/components/contracts/src' ].
-     * Compiler will first convert './protocols/file2' into absolute path relative to the location of containing file:
-     * '/local/src/content/protocols/file2' and try to load it - failure.
-     * Then it will search 'rootDirs' looking for a longest matching prefix of this absolute path and if such prefix is found - absolute path will
-     * be converted to a path relative to found rootDir entry './content/protocols/file2' (*). As a last step compiler will check all remaining
-     * entries in 'rootDirs', use them to build absolute path out of (*) and try to resolve module from this location.
-     */
-    function tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (moduleHasNonRelativeName(moduleName)) {
-            return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
-        }
-        else {
-            return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
-        }
-    }
-    function tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.rootDirs) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
-        }
-        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-        var matchedRootDir;
-        var matchedNormalizedPrefix;
-        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
-            var rootDir = _a[_i];
-            // rootDirs are expected to be absolute
-            // in case of tsconfig.json this will happen automatically - compiler will expand relative names
-            // using location of tsconfig.json as base location
-            var normalizedRoot = ts.normalizePath(rootDir);
-            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
-                normalizedRoot += ts.directorySeparator;
-            }
-            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
-                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
-            }
-            if (isLongestMatchingPrefix) {
-                matchedNormalizedPrefix = normalizedRoot;
-                matchedRootDir = rootDir;
-            }
-        }
-        if (matchedNormalizedPrefix) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
-            }
-            var suffix = candidate.substr(matchedNormalizedPrefix.length);
-            // first - try to load from a initial location
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
-            }
-            var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
-            if (resolvedFileName) {
-                return resolvedFileName;
-            }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
-            }
-            // then try to resolve using remaining entries in rootDirs
-            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
-                var rootDir = _c[_b];
-                if (rootDir === matchedRootDir) {
-                    // skip the initially matched entry
-                    continue;
-                }
-                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
-                }
-                var baseDirectory = ts.getDirectoryPath(candidate_1);
-                var resolvedFileName_1 = loader(candidate_1, supportedExtensions, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
-                if (resolvedFileName_1) {
-                    return resolvedFileName_1;
-                }
-            }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
-            }
-        }
-        return undefined;
-    }
-    function tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.baseUrl) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
-        }
-        var longestMatchPrefixLength = -1;
-        var matchedPattern;
-        var matchedStar;
-        if (state.compilerOptions.paths) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
-            }
-            for (var key in state.compilerOptions.paths) {
-                var pattern = key;
-                var indexOfStar = pattern.indexOf("*");
-                if (indexOfStar !== -1) {
-                    var prefix = pattern.substr(0, indexOfStar);
-                    var suffix = pattern.substr(indexOfStar + 1);
-                    if (moduleName.length >= prefix.length + suffix.length &&
-                        ts.startsWith(moduleName, prefix) &&
-                        ts.endsWith(moduleName, suffix)) {
-                        // use length of prefix as betterness criteria
-                        if (prefix.length > longestMatchPrefixLength) {
-                            longestMatchPrefixLength = prefix.length;
-                            matchedPattern = pattern;
-                            matchedStar = moduleName.substr(prefix.length, moduleName.length - suffix.length);
-                        }
-                    }
-                }
-                else if (pattern === moduleName) {
-                    // pattern was matched as is - no need to search further
-                    matchedPattern = pattern;
-                    matchedStar = undefined;
-                    break;
-                }
-            }
-        }
-        if (matchedPattern) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPattern);
-            }
-            for (var _i = 0, _a = state.compilerOptions.paths[matchedPattern]; _i < _a.length; _i++) {
-                var subst = _a[_i];
-                var path = matchedStar ? subst.replace("\*", matchedStar) : subst;
-                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
-                }
-                var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
-                if (resolvedFileName) {
-                    return resolvedFileName;
-                }
-            }
-            return undefined;
-        }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
-            }
-            return loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
-        }
-    }
-    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var failedLookupLocations = [];
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: false };
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName, failedLookupLocations, supportedExtensions, state);
-        var isExternalLibraryImport = false;
-        if (!resolvedFileName) {
-            if (moduleHasNonRelativeName(moduleName)) {
-                if (traceEnabled) {
-                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
-                }
-                resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state);
-                isExternalLibraryImport = resolvedFileName !== undefined;
-            }
-            else {
-                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
-            }
-        }
-        if (resolvedFileName && host.realpath) {
-            var originalFileName = resolvedFileName;
-            resolvedFileName = ts.normalizePath(host.realpath(resolvedFileName));
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
-            }
-        }
-        return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
-    }
-    ts.nodeModuleNameResolver = nodeModuleNameResolver;
-    function nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state) {
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
-        }
-        var resolvedFileName = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
-        return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
-    }
-    /* @internal */
-    function directoryProbablyExists(directoryName, host) {
-        // if host does not support 'directoryExists' assume that directory will exist
-        return !host.directoryExists || host.directoryExists(directoryName);
-    }
-    ts.directoryProbablyExists = directoryProbablyExists;
-    /**
-     * @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
-     * in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
-     */
-    function loadModuleFromFile(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
-        if (!onlyRecordFailures) {
-            // check if containig folder exists - if it doesn't then just record failures for all supported extensions without disk probing
-            var directory = ts.getDirectoryPath(candidate);
-            if (directory) {
-                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
-            }
-        }
-        return ts.forEach(extensions, tryLoad);
-        function tryLoad(ext) {
-            if (ext === ".tsx" && state.skipTsx) {
-                return undefined;
-            }
-            var fileName = ts.fileExtensionIs(candidate, ext) ? candidate : candidate + ext;
-            if (!onlyRecordFailures && state.host.fileExists(fileName)) {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
-                }
-                return fileName;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
-                }
-                failedLookupLocation.push(fileName);
-                return undefined;
-            }
-        }
-    }
-    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocation, onlyRecordFailures, state) {
-        var packageJsonPath = ts.combinePaths(candidate, "package.json");
-        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
-        if (directoryExists && state.host.fileExists(packageJsonPath)) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
-            }
-            var typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
-            if (typesFile) {
-                var result = loadModuleFromFile(typesFile, extensions, failedLookupLocation, !directoryProbablyExists(ts.getDirectoryPath(typesFile), state.host), state);
-                if (result) {
-                    return result;
-                }
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.package_json_does_not_have_types_field);
-                }
-            }
-        }
-        else {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
-            }
-            // record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
-            failedLookupLocation.push(packageJsonPath);
-        }
-        return loadModuleFromFile(ts.combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
-    }
-    function loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) {
-        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
-        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
-        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
-        // Load only typescript files irrespective of allowJs option if loading from node modules
-        var result = loadModuleFromFile(candidate, ts.supportedTypeScriptExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
-        }
-        result = loadNodeModuleFromDirectory(ts.supportedTypeScriptExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
-        }
-    }
-    function loadModuleFromNodeModules(moduleName, directory, failedLookupLocations, state) {
-        directory = ts.normalizeSlashes(directory);
-        while (true) {
-            var baseName = ts.getBaseFileName(directory);
-            if (baseName !== "node_modules") {
-                var result = 
-                // first: try to load module as-is
-                loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) ||
-                    // second: try to load module from the scope '@types'
-                    loadModuleFromNodeModulesFolder(ts.combinePaths("@types", moduleName), directory, failedLookupLocations, state);
-                if (result) {
-                    return result;
-                }
-            }
-            var parentPath = ts.getDirectoryPath(directory);
-            if (parentPath === directory) {
-                break;
-            }
-            directory = parentPath;
-        }
-        return undefined;
-    }
-    function classicNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: !compilerOptions.jsx };
-        var failedLookupLocations = [];
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
-        if (resolvedFileName) {
-            return createResolvedModule(resolvedFileName, /*isExternalLibraryImport*/ false, failedLookupLocations);
-        }
-        var referencedSourceFile;
-        if (moduleHasNonRelativeName(moduleName)) {
-            while (true) {
-                var searchName = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
-                if (referencedSourceFile) {
-                    break;
-                }
-                var parentPath = ts.getDirectoryPath(containingDirectory);
-                if (parentPath === containingDirectory) {
-                    break;
-                }
-                containingDirectory = parentPath;
-            }
-        }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-            referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
-        }
-        return referencedSourceFile
-            ? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations: failedLookupLocations }
-            : { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
-    }
-    ts.classicNameResolver = classicNameResolver;
-    /* @internal */
-    ts.defaultInitCompilerOptions = {
-        module: ts.ModuleKind.CommonJS,
-        target: 1 /* ES5 */,
-        noImplicitAny: false,
-        sourceMap: false
-    };
-    function createCompilerHost(options, setParentNodes) {
-        var existingDirectories = {};
-        function getCanonicalFileName(fileName) {
-            // if underlying system can distinguish between two files whose names differs only in cases then file name already in canonical form.
-            // otherwise use toLowerCase as a canonical form.
-            return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
-        }
-        // returned by CScript sys environment
-        var unsupportedFileEncodingErrorCode = -2147024809;
-        function getSourceFile(fileName, languageVersion, onError) {
-            var text;
-            try {
-                var start = new Date().getTime();
-                text = ts.sys.readFile(fileName, options.charset);
-                ts.ioReadTime += new Date().getTime() - start;
-            }
-            catch (e) {
-                if (onError) {
-                    onError(e.number === unsupportedFileEncodingErrorCode
-                        ? ts.createCompilerDiagnostic(ts.Diagnostics.Unsupported_file_encoding).messageText
-                        : e.message);
-                }
-                text = "";
-            }
-            return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
-        }
-        function directoryExists(directoryPath) {
-            if (ts.hasProperty(existingDirectories, directoryPath)) {
-                return true;
-            }
-            if (ts.sys.directoryExists(directoryPath)) {
-                existingDirectories[directoryPath] = true;
-                return true;
-            }
-            return false;
-        }
-        function ensureDirectoriesExist(directoryPath) {
-            if (directoryPath.length > ts.getRootLength(directoryPath) && !directoryExists(directoryPath)) {
-                var parentDirectory = ts.getDirectoryPath(directoryPath);
-                ensureDirectoriesExist(parentDirectory);
-                ts.sys.createDirectory(directoryPath);
-            }
-        }
-        var outputFingerprints;
-        function writeFileIfUpdated(fileName, data, writeByteOrderMark) {
-            if (!outputFingerprints) {
-                outputFingerprints = {};
-            }
-            var hash = ts.sys.createHash(data);
-            var mtimeBefore = ts.sys.getModifiedTime(fileName);
-            if (mtimeBefore && ts.hasProperty(outputFingerprints, fileName)) {
-                var fingerprint = outputFingerprints[fileName];
-                // If output has not been changed, and the file has no external modification
-                if (fingerprint.byteOrderMark === writeByteOrderMark &&
-                    fingerprint.hash === hash &&
-                    fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
-                    return;
-                }
-            }
-            ts.sys.writeFile(fileName, data, writeByteOrderMark);
-            var mtimeAfter = ts.sys.getModifiedTime(fileName);
-            outputFingerprints[fileName] = {
-                hash: hash,
-                byteOrderMark: writeByteOrderMark,
-                mtime: mtimeAfter
-            };
-        }
-        function writeFile(fileName, data, writeByteOrderMark, onError) {
-            try {
-                var start = new Date().getTime();
-                ensureDirectoriesExist(ts.getDirectoryPath(ts.normalizePath(fileName)));
-                if (ts.isWatchSet(options) && ts.sys.createHash && ts.sys.getModifiedTime) {
-                    writeFileIfUpdated(fileName, data, writeByteOrderMark);
-                }
-                else {
-                    ts.sys.writeFile(fileName, data, writeByteOrderMark);
-                }
-                ts.ioWriteTime += new Date().getTime() - start;
-            }
-            catch (e) {
-                if (onError) {
-                    onError(e.message);
-                }
-            }
-        }
-        function getDefaultTypeDirectiveNames(rootPath) {
-            var localTypes = ts.combinePaths(rootPath, "types");
-            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
-            var result = [];
-            if (ts.sys.directoryExists(localTypes)) {
-                result = result.concat(ts.sys.getDirectories(localTypes));
-            }
-            if (ts.sys.directoryExists(npmTypes)) {
-                result = result.concat(ts.sys.getDirectories(npmTypes));
-            }
-            return result;
-        }
-        function getDefaultLibLocation() {
-            return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
-        }
-        var newLine = ts.getNewLineCharacter(options);
-        var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
-        return {
-            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
-            getSourceFile: getSourceFile,
-            getDefaultLibLocation: getDefaultLibLocation,
-            getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
-            writeFile: writeFile,
-            getCurrentDirectory: ts.memoize(function () { return ts.sys.getCurrentDirectory(); }),
-            useCaseSensitiveFileNames: function () { return ts.sys.useCaseSensitiveFileNames; },
-            getCanonicalFileName: getCanonicalFileName,
-            getNewLine: function () { return newLine; },
-            fileExists: function (fileName) { return ts.sys.fileExists(fileName); },
-            readFile: function (fileName) { return ts.sys.readFile(fileName); },
-            trace: function (s) { return ts.sys.write(s + newLine); },
-            directoryExists: function (directoryName) { return ts.sys.directoryExists(directoryName); },
-            realpath: realpath
-        };
-    }
-    ts.createCompilerHost = createCompilerHost;
-    function getPreEmitDiagnostics(program, sourceFile, cancellationToken) {
-        var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
-        if (program.getCompilerOptions().declaration) {
-            diagnostics = diagnostics.concat(program.getDeclarationDiagnostics(sourceFile, cancellationToken));
-        }
-        return ts.sortAndDeduplicateDiagnostics(diagnostics);
-    }
-    ts.getPreEmitDiagnostics = getPreEmitDiagnostics;
-    function flattenDiagnosticMessageText(messageText, newLine) {
-        if (typeof messageText === "string") {
-            return messageText;
-        }
-        else {
-            var diagnosticChain = messageText;
-            var result = "";
-            var indent = 0;
-            while (diagnosticChain) {
-                if (indent) {
-                    result += newLine;
-                    for (var i = 0; i < indent; i++) {
-                        result += "  ";
-                    }
-                }
-                result += diagnosticChain.messageText;
-                indent++;
-                diagnosticChain = diagnosticChain.next;
-            }
-            return result;
-        }
-    }
-    ts.flattenDiagnosticMessageText = flattenDiagnosticMessageText;
-    function loadWithLocalCache(names, containingFile, loader) {
-        if (names.length === 0) {
-            return [];
-        }
-        var resolutions = [];
-        var cache = {};
-        for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
-            var name_33 = names_1[_i];
-            var result = void 0;
-            if (ts.hasProperty(cache, name_33)) {
-                result = cache[name_33];
-            }
-            else {
-                result = loader(name_33, containingFile);
-                cache[name_33] = result;
-            }
-            resolutions.push(result);
-        }
-        return resolutions;
-    }
-    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
-        // Use explicit type list from tsconfig.json
-        if (options.types) {
-            return options.types;
-        }
-        // or load all types from the automatic type import fields
-        if (host && host.getDefaultTypeDirectiveNames) {
-            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
-            if (commonRoot) {
-                return host.getDefaultTypeDirectiveNames(commonRoot);
-            }
-        }
-        return undefined;
-    }
-    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
-    function createProgram(rootNames, options, host, oldProgram) {
-        var program;
-        var files = [];
-        var commonSourceDirectory;
-        var diagnosticsProducingTypeChecker;
-        var noDiagnosticsTypeChecker;
-        var classifiableNames;
-        var resolvedTypeReferenceDirectives = {};
-        var fileProcessingDiagnostics = ts.createDiagnosticCollection();
-        var start = new Date().getTime();
-        host = host || createCompilerHost(options);
-        var skipDefaultLib = options.noLib;
-        var programDiagnostics = ts.createDiagnosticCollection();
-        var currentDirectory = host.getCurrentDirectory();
-        var supportedExtensions = ts.getSupportedExtensions(options);
-        // Map storing if there is emit blocking diagnostics for given input
-        var hasEmitBlockingDiagnostics = ts.createFileMap(getCanonicalFileName);
-        var resolveModuleNamesWorker;
-        if (host.resolveModuleNames) {
-            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
-        }
-        else {
-            var loader_1 = function (moduleName, containingFile) { return resolveModuleName(moduleName, containingFile, options, host).resolvedModule; };
-            resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(moduleNames, containingFile, loader_1); };
-        }
-        var resolveTypeReferenceDirectiveNamesWorker;
-        if (host.resolveTypeReferenceDirectives) {
-            resolveTypeReferenceDirectiveNamesWorker = function (typeDirectiveNames, containingFile) { return host.resolveTypeReferenceDirectives(typeDirectiveNames, containingFile); };
-        }
-        else {
-            var loader_2 = function (typesRef, containingFile) { return resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective; };
-            resolveTypeReferenceDirectiveNamesWorker = function (typeReferenceDirectiveNames, containingFile) { return loadWithLocalCache(typeReferenceDirectiveNames, containingFile, loader_2); };
-        }
-        var filesByName = ts.createFileMap();
-        // stores 'filename -> file association' ignoring case
-        // used to track cases when two file names differ only in casing
-        var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
-        if (!tryReuseStructureFromOldProgram()) {
-            ts.forEach(rootNames, function (name) { return processRootFile(name, /*isDefaultLib*/ false); });
-            // load type declarations specified via 'types' argument
-            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
-            if (typeReferences) {
-                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, /*containingFile*/ undefined);
-                for (var i = 0; i < typeReferences.length; i++) {
-                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
-                }
-            }
-            // Do not process the default library if:
-            //  - The '--noLib' flag is used.
-            //  - A 'no-default-lib' reference comment is encountered in
-            //      processing the root files.
-            if (!skipDefaultLib) {
-                // If '--lib' is not specified, include default library file according to '--target'
-                // otherwise, using options specified in '--lib' instead of '--target' default library file
-                if (!options.lib) {
-                    processRootFile(host.getDefaultLibFileName(options), /*isDefaultLib*/ true);
-                }
-                else {
-                    var libDirectory_1 = host.getDefaultLibLocation ? host.getDefaultLibLocation() : ts.getDirectoryPath(host.getDefaultLibFileName(options));
-                    ts.forEach(options.lib, function (libFileName) {
-                        processRootFile(ts.combinePaths(libDirectory_1, libFileName), /*isDefaultLib*/ true);
-                    });
-                }
-            }
-        }
-        // unconditionally set oldProgram to undefined to prevent it from being captured in closure
-        oldProgram = undefined;
-        program = {
-            getRootFileNames: function () { return rootNames; },
-            getSourceFile: getSourceFile,
-            getSourceFileByPath: getSourceFileByPath,
-            getSourceFiles: function () { return files; },
-            getCompilerOptions: function () { return options; },
-            getSyntacticDiagnostics: getSyntacticDiagnostics,
-            getOptionsDiagnostics: getOptionsDiagnostics,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getSemanticDiagnostics: getSemanticDiagnostics,
-            getDeclarationDiagnostics: getDeclarationDiagnostics,
-            getTypeChecker: getTypeChecker,
-            getClassifiableNames: getClassifiableNames,
-            getDiagnosticsProducingTypeChecker: getDiagnosticsProducingTypeChecker,
-            getCommonSourceDirectory: getCommonSourceDirectory,
-            emit: emit,
-            getCurrentDirectory: function () { return currentDirectory; },
-            getNodeCount: function () { return getDiagnosticsProducingTypeChecker().getNodeCount(); },
-            getIdentifierCount: function () { return getDiagnosticsProducingTypeChecker().getIdentifierCount(); },
-            getSymbolCount: function () { return getDiagnosticsProducingTypeChecker().getSymbolCount(); },
-            getTypeCount: function () { return getDiagnosticsProducingTypeChecker().getTypeCount(); },
-            getFileProcessingDiagnostics: function () { return fileProcessingDiagnostics; },
-            getResolvedTypeReferenceDirectives: function () { return resolvedTypeReferenceDirectives; }
-        };
-        verifyCompilerOptions();
-        ts.programTime += new Date().getTime() - start;
-        return program;
-        function getCommonSourceDirectory() {
-            if (typeof commonSourceDirectory === "undefined") {
-                if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
-                    // If a rootDir is specified and is valid use it as the commonSourceDirectory
-                    commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
-                }
-                else {
-                    commonSourceDirectory = computeCommonSourceDirectory(files);
-                }
-                if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
-                    // Make sure directory path ends with directory separator so this string can directly
-                    // used to replace with "" to get the relative path of the source file and the relative path doesn't
-                    // start with / making it rooted path
-                    commonSourceDirectory += ts.directorySeparator;
-                }
-            }
-            return commonSourceDirectory;
-        }
-        function getClassifiableNames() {
-            if (!classifiableNames) {
-                // Initialize a checker so that all our files are bound.
-                getTypeChecker();
-                classifiableNames = {};
-                for (var _i = 0, files_3 = files; _i < files_3.length; _i++) {
-                    var sourceFile = files_3[_i];
-                    ts.copyMap(sourceFile.classifiableNames, classifiableNames);
-                }
-            }
-            return classifiableNames;
-        }
-        function tryReuseStructureFromOldProgram() {
-            if (!oldProgram) {
-                return false;
-            }
-            // check properties that can affect structure of the program or module resolution strategy
-            // if any of these properties has changed - structure cannot be reused
-            var oldOptions = oldProgram.getCompilerOptions();
-            if ((oldOptions.module !== options.module) ||
-                (oldOptions.noResolve !== options.noResolve) ||
-                (oldOptions.target !== options.target) ||
-                (oldOptions.noLib !== options.noLib) ||
-                (oldOptions.jsx !== options.jsx) ||
-                (oldOptions.allowJs !== options.allowJs) ||
-                (oldOptions.rootDir !== options.rootDir) ||
-                (oldOptions.typesSearchPaths !== options.typesSearchPaths) ||
-                (oldOptions.configFilePath !== options.configFilePath) ||
-                (oldOptions.baseUrl !== options.baseUrl) ||
-                (oldOptions.typesRoot !== options.typesRoot) ||
-                !ts.arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
-                !ts.mapIsEqualTo(oldOptions.paths, options.paths)) {
-                return false;
-            }
-            ts.Debug.assert(!oldProgram.structureIsReused);
-            // there is an old program, check if we can reuse its structure
-            var oldRootNames = oldProgram.getRootFileNames();
-            if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
-                return false;
-            }
-            if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
-                return false;
-            }
-            // check if program source files has changed in the way that can affect structure of the program
-            var newSourceFiles = [];
-            var filePaths = [];
-            var modifiedSourceFiles = [];
-            for (var _i = 0, _a = oldProgram.getSourceFiles(); _i < _a.length; _i++) {
-                var oldSourceFile = _a[_i];
-                var newSourceFile = host.getSourceFileByPath
-                    ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target)
-                    : host.getSourceFile(oldSourceFile.fileName, options.target);
-                if (!newSourceFile) {
-                    return false;
-                }
-                newSourceFile.path = oldSourceFile.path;
-                filePaths.push(newSourceFile.path);
-                if (oldSourceFile !== newSourceFile) {
-                    if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
-                        // value of no-default-lib has changed
-                        // this will affect if default library is injected into the list of files
-                        return false;
-                    }
-                    // check tripleslash references
-                    if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
-                        // tripleslash references has changed
-                        return false;
-                    }
-                    // check imports and module augmentations
-                    collectExternalModuleReferences(newSourceFile);
-                    if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
-                        // imports has changed
-                        return false;
-                    }
-                    if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
-                        // moduleAugmentations has changed
-                        return false;
-                    }
-                    if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
-                        // 'types' references has changed
-                        return false;
-                    }
-                    var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
-                    if (resolveModuleNamesWorker) {
-                        var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
-                        var resolutions = resolveModuleNamesWorker(moduleNames, newSourceFilePath);
-                        // ensure that module resolution results are still correct
-                        var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
-                    }
-                    if (resolveTypeReferenceDirectiveNamesWorker) {
-                        var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
-                        var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
-                        // ensure that types resolutions are still correct
-                        var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
-                    }
-                    // pass the cache of module/types resolutions from the old source file
-                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
-                    newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
-                    modifiedSourceFiles.push(newSourceFile);
-                }
-                else {
-                    // file has no changes - use it as is
-                    newSourceFile = oldSourceFile;
-                }
-                // if file has passed all checks it should be safe to reuse it
-                newSourceFiles.push(newSourceFile);
-            }
-            // update fileName -> file mapping
-            for (var i = 0, len = newSourceFiles.length; i < len; i++) {
-                filesByName.set(filePaths[i], newSourceFiles[i]);
-            }
-            files = newSourceFiles;
-            fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
-            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
-                var modifiedFile = modifiedSourceFiles_1[_b];
-                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile);
-            }
-            resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
-            oldProgram.structureIsReused = true;
-            return true;
-        }
-        function getEmitHost(writeFileCallback) {
-            return {
-                getCanonicalFileName: getCanonicalFileName,
-                getCommonSourceDirectory: program.getCommonSourceDirectory,
-                getCompilerOptions: program.getCompilerOptions,
-                getCurrentDirectory: function () { return currentDirectory; },
-                getNewLine: function () { return host.getNewLine(); },
-                getSourceFile: program.getSourceFile,
-                getSourceFileByPath: program.getSourceFileByPath,
-                getSourceFiles: program.getSourceFiles,
-                writeFile: writeFileCallback || (function (fileName, data, writeByteOrderMark, onError, sourceFiles) { return host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles); }),
-                isEmitBlocked: isEmitBlocked
-            };
-        }
-        function getDiagnosticsProducingTypeChecker() {
-            return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ true));
-        }
-        function getTypeChecker() {
-            return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ false));
-        }
-        function emit(sourceFile, writeFileCallback, cancellationToken) {
-            var _this = this;
-            return runWithCancellationToken(function () { return emitWorker(_this, sourceFile, writeFileCallback, cancellationToken); });
-        }
-        function isEmitBlocked(emitFileName) {
-            return hasEmitBlockingDiagnostics.contains(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName));
-        }
-        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken) {
-            var declarationDiagnostics = [];
-            if (options.noEmit) {
-                return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
-            }
-            // If the noEmitOnError flag is set, then check if we have any errors so far.  If so,
-            // immediately bail out.  Note that we pass 'undefined' for 'sourceFile' so that we
-            // get any preEmit diagnostics, not just the ones
-            if (options.noEmitOnError) {
-                var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
-                if (diagnostics.length === 0 && program.getCompilerOptions().declaration) {
-                    declarationDiagnostics = program.getDeclarationDiagnostics(/*sourceFile*/ undefined, cancellationToken);
-                }
-                if (diagnostics.length > 0 || declarationDiagnostics.length > 0) {
-                    return {
-                        diagnostics: ts.concatenate(diagnostics, declarationDiagnostics),
-                        sourceMaps: undefined,
-                        emittedFiles: undefined,
-                        emitSkipped: true
-                    };
-                }
-            }
-            // Create the emit resolver outside of the "emitTime" tracking code below.  That way
-            // any cost associated with it (like type checking) are appropriate associated with
-            // the type-checking counter.
-            //
-            // If the -out option is specified, we should not pass the source file to getEmitResolver.
-            // This is because in the -out scenario all files need to be emitted, and therefore all
-            // files need to be type checked. And the way to specify that all files need to be type
-            // checked is to not pass the file to getEmitResolver.
-            var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile);
-            var start = new Date().getTime();
-            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile);
-            ts.emitTime += new Date().getTime() - start;
-            return emitResult;
-        }
-        function getSourceFile(fileName) {
-            return getSourceFileByPath(ts.toPath(fileName, currentDirectory, getCanonicalFileName));
-        }
-        function getSourceFileByPath(path) {
-            return filesByName.get(path);
-        }
-        function getDiagnosticsHelper(sourceFile, getDiagnostics, cancellationToken) {
-            if (sourceFile) {
-                return getDiagnostics(sourceFile, cancellationToken);
-            }
-            var allDiagnostics = [];
-            ts.forEach(program.getSourceFiles(), function (sourceFile) {
-                if (cancellationToken) {
-                    cancellationToken.throwIfCancellationRequested();
-                }
-                ts.addRange(allDiagnostics, getDiagnostics(sourceFile, cancellationToken));
-            });
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function getSyntacticDiagnostics(sourceFile, cancellationToken) {
-            return getDiagnosticsHelper(sourceFile, getSyntacticDiagnosticsForFile, cancellationToken);
-        }
-        function getSemanticDiagnostics(sourceFile, cancellationToken) {
-            return getDiagnosticsHelper(sourceFile, getSemanticDiagnosticsForFile, cancellationToken);
-        }
-        function getDeclarationDiagnostics(sourceFile, cancellationToken) {
-            var options = program.getCompilerOptions();
-            // collect diagnostics from the program only once if either no source file was specified or out/outFile is set (bundled emit)
-            if (!sourceFile || options.out || options.outFile) {
-                return getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
-            }
-            else {
-                return getDiagnosticsHelper(sourceFile, getDeclarationDiagnosticsForFile, cancellationToken);
-            }
-        }
-        function getSyntacticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return sourceFile.parseDiagnostics;
-        }
-        function runWithCancellationToken(func) {
-            try {
-                return func();
-            }
-            catch (e) {
-                if (e instanceof ts.OperationCanceledException) {
-                    // We were canceled while performing the operation.  Because our type checker
-                    // might be a bad state, we need to throw it away.
-                    //
-                    // Note: we are overly aggressive here.  We do not actually *have* to throw away
-                    // the "noDiagnosticsTypeChecker".  However, for simplicity, i'd like to keep
-                    // the lifetimes of these two TypeCheckers the same.  Also, we generally only
-                    // cancel when the user has made a change anyways.  And, in that case, we (the
-                    // program instance) will get thrown away anyways.  So trying to keep one of
-                    // these type checkers alive doesn't serve much purpose.
-                    noDiagnosticsTypeChecker = undefined;
-                    diagnosticsProducingTypeChecker = undefined;
-                }
-                throw e;
-            }
-        }
-        function getSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var typeChecker = getDiagnosticsProducingTypeChecker();
-                ts.Debug.assert(!!sourceFile.bindDiagnostics);
-                var bindDiagnostics = sourceFile.bindDiagnostics;
-                // For JavaScript files, we don't want to report the normal typescript semantic errors.
-                // Instead, we just report errors for using TypeScript-only constructs from within a
-                // JavaScript file.
-                var checkDiagnostics = ts.isSourceFileJavaScript(sourceFile) ?
-                    getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) :
-                    typeChecker.getDiagnostics(sourceFile, cancellationToken);
-                var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
-                var programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
-                return bindDiagnostics.concat(checkDiagnostics).concat(fileProcessingDiagnosticsInFile).concat(programDiagnosticsInFile);
-            });
-        }
-        function getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var diagnostics = [];
-                walk(sourceFile);
-                return diagnostics;
-                function walk(node) {
-                    if (!node) {
-                        return false;
-                    }
-                    switch (node.kind) {
-                        case 229 /* ImportEqualsDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 235 /* ExportAssignment */:
-                            if (node.isExportEquals) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 221 /* ClassDeclaration */:
-                            var classDeclaration = node;
-                            if (checkModifiers(classDeclaration.modifiers) ||
-                                checkTypeParameters(classDeclaration.typeParameters)) {
-                                return true;
-                            }
-                            break;
-                        case 251 /* HeritageClause */:
-                            var heritageClause = node;
-                            if (heritageClause.token === 106 /* ImplementsKeyword */) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 222 /* InterfaceDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 225 /* ModuleDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 223 /* TypeAliasDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 148 /* Constructor */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                        case 179 /* FunctionExpression */:
-                        case 220 /* FunctionDeclaration */:
-                        case 180 /* ArrowFunction */:
-                        case 220 /* FunctionDeclaration */:
-                            var functionDeclaration = node;
-                            if (checkModifiers(functionDeclaration.modifiers) ||
-                                checkTypeParameters(functionDeclaration.typeParameters) ||
-                                checkTypeAnnotation(functionDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 200 /* VariableStatement */:
-                            var variableStatement = node;
-                            if (checkModifiers(variableStatement.modifiers)) {
-                                return true;
-                            }
-                            break;
-                        case 218 /* VariableDeclaration */:
-                            var variableDeclaration = node;
-                            if (checkTypeAnnotation(variableDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 174 /* CallExpression */:
-                        case 175 /* NewExpression */:
-                            var expression = node;
-                            if (expression.typeArguments && expression.typeArguments.length > 0) {
-                                var start_2 = expression.typeArguments.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_2, expression.typeArguments.end - start_2, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 142 /* Parameter */:
-                            var parameter = node;
-                            if (parameter.modifiers) {
-                                var start_3 = parameter.modifiers.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_3, parameter.modifiers.end - start_3, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            if (parameter.questionToken) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
-                                return true;
-                            }
-                            if (parameter.type) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 145 /* PropertyDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.property_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 224 /* EnumDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 177 /* TypeAssertionExpression */:
-                            var typeAssertionExpression = node;
-                            diagnostics.push(ts.createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 143 /* Decorator */:
-                            if (!options.experimentalDecorators) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
-                            }
-                            return true;
-                    }
-                    return ts.forEachChild(node, walk);
-                }
-                function checkTypeParameters(typeParameters) {
-                    if (typeParameters) {
-                        var start_4 = typeParameters.pos;
-                        diagnostics.push(ts.createFileDiagnostic(sourceFile, start_4, typeParameters.end - start_4, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
-                        return true;
-                    }
-                    return false;
-                }
-                function checkTypeAnnotation(type) {
-                    if (type) {
-                        diagnostics.push(ts.createDiagnosticForNode(type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                        return true;
-                    }
-                    return false;
-                }
-                function checkModifiers(modifiers) {
-                    if (modifiers) {
-                        for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
-                            var modifier = modifiers_1[_i];
-                            switch (modifier.kind) {
-                                case 112 /* PublicKeyword */:
-                                case 110 /* PrivateKeyword */:
-                                case 111 /* ProtectedKeyword */:
-                                case 128 /* ReadonlyKeyword */:
-                                case 122 /* DeclareKeyword */:
-                                    diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
-                                    return true;
-                                // These are all legal modifiers.
-                                case 113 /* StaticKeyword */:
-                                case 82 /* ExportKeyword */:
-                                case 74 /* ConstKeyword */:
-                                case 77 /* DefaultKeyword */:
-                                case 115 /* AbstractKeyword */:
-                            }
-                        }
-                    }
-                    return false;
-                }
-            });
-        }
-        function getDeclarationDiagnosticsWorker(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
-                // Don't actually write any files since we're just getting diagnostics.
-                var writeFile = function () { };
-                return ts.getDeclarationDiagnostics(getEmitHost(writeFile), resolver, sourceFile);
-            });
-        }
-        function getDeclarationDiagnosticsForFile(sourceFile, cancellationToken) {
-            return ts.isDeclarationFile(sourceFile) ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
-        }
-        function getOptionsDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, fileProcessingDiagnostics.getGlobalDiagnostics());
-            ts.addRange(allDiagnostics, programDiagnostics.getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function getGlobalDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, getDiagnosticsProducingTypeChecker().getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function hasExtension(fileName) {
-            return ts.getBaseFileName(fileName).indexOf(".") >= 0;
-        }
-        function processRootFile(fileName, isDefaultLib) {
-            processSourceFile(ts.normalizePath(fileName), isDefaultLib, /*isReference*/ true);
-        }
-        function fileReferenceIsEqualTo(a, b) {
-            return a.fileName === b.fileName;
-        }
-        function moduleNameIsEqualTo(a, b) {
-            return a.text === b.text;
-        }
-        function getTextOfLiteral(literal) {
-            return literal.text;
-        }
-        function collectExternalModuleReferences(file) {
-            if (file.imports) {
-                return;
-            }
-            var isJavaScriptFile = ts.isSourceFileJavaScript(file);
-            var isExternalModuleFile = ts.isExternalModule(file);
-            var imports;
-            var moduleAugmentations;
-            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
-                var node = _a[_i];
-                collectModuleReferences(node, /*inAmbientModule*/ false);
-                if (isJavaScriptFile) {
-                    collectRequireCalls(node);
-                }
-            }
-            file.imports = imports || emptyArray;
-            file.moduleAugmentations = moduleAugmentations || emptyArray;
-            return;
-            function collectModuleReferences(node, inAmbientModule) {
-                switch (node.kind) {
-                    case 230 /* ImportDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 236 /* ExportDeclaration */:
-                        var moduleNameExpr = ts.getExternalModuleName(node);
-                        if (!moduleNameExpr || moduleNameExpr.kind !== 9 /* StringLiteral */) {
-                            break;
-                        }
-                        if (!moduleNameExpr.text) {
-                            break;
-                        }
-                        // TypeScript 1.0 spec (April 2014): 12.1.6
-                        // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference other external modules
-                        // only through top - level external module names. Relative external module names are not permitted.
-                        if (!inAmbientModule || !ts.isExternalModuleNameRelative(moduleNameExpr.text)) {
-                            (imports || (imports = [])).push(moduleNameExpr);
-                        }
-                        break;
-                    case 225 /* ModuleDeclaration */:
-                        if (ts.isAmbientModule(node) && (inAmbientModule || node.flags & 2 /* Ambient */ || ts.isDeclarationFile(file))) {
-                            var moduleName = node.name;
-                            // Ambient module declarations can be interpreted as augmentations for some existing external modules.
-                            // This will happen in two cases:
-                            // - if current file is external module then module augmentation is a ambient module declaration defined in the top level scope
-                            // - if current file is not external module then module augmentation is an ambient module declaration with non-relative module name
-                            //   immediately nested in top level ambient module declaration .
-                            if (isExternalModuleFile || (inAmbientModule && !ts.isExternalModuleNameRelative(moduleName.text))) {
-                                (moduleAugmentations || (moduleAugmentations = [])).push(moduleName);
-                            }
-                            else if (!inAmbientModule) {
-                                // An AmbientExternalModuleDeclaration declares an external module.
-                                // This type of declaration is permitted only in the global module.
-                                // The StringLiteral must specify a top - level external module name.
-                                // Relative external module names are not permitted
-                                // NOTE: body of ambient module is always a module block
-                                for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
-                                    var statement = _a[_i];
-                                    collectModuleReferences(statement, /*inAmbientModule*/ true);
-                                }
-                            }
-                        }
-                }
-            }
-            function collectRequireCalls(node) {
-                if (ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
-                    (imports || (imports = [])).push(node.arguments[0]);
-                }
-                else {
-                    ts.forEachChild(node, collectRequireCalls);
-                }
-            }
-        }
-        /**
-          * 'isReference' indicates whether the file was brought in via a reference directive (rather than an import declaration)
-          */
-        function processSourceFile(fileName, isDefaultLib, isReference, refFile, refPos, refEnd) {
-            var diagnosticArgument;
-            var diagnostic;
-            if (hasExtension(fileName)) {
-                if (!options.allowNonTsExtensions && !ts.forEach(supportedExtensions, function (extension) { return ts.fileExtensionIs(host.getCanonicalFileName(fileName), extension); })) {
-                    diagnostic = ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1;
-                    diagnosticArgument = [fileName, "'" + supportedExtensions.join("', '") + "'"];
-                }
-                else if (!findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd)) {
-                    diagnostic = ts.Diagnostics.File_0_not_found;
-                    diagnosticArgument = [fileName];
-                }
-                else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
-                    diagnostic = ts.Diagnostics.A_file_cannot_have_a_reference_to_itself;
-                    diagnosticArgument = [fileName];
-                }
-            }
-            else {
-                var nonTsFile = options.allowNonTsExtensions && findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd);
-                if (!nonTsFile) {
-                    if (options.allowNonTsExtensions) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        diagnosticArgument = [fileName];
-                    }
-                    else if (!ts.forEach(supportedExtensions, function (extension) { return findSourceFile(fileName + extension, ts.toPath(fileName + extension, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd); })) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        fileName += ".ts";
-                        diagnosticArgument = [fileName];
-                    }
-                }
-            }
-            if (diagnostic) {
-                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
-                    fileProcessingDiagnostics.add(ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(diagnosticArgument)));
-                }
-                else {
-                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(diagnosticArgument)));
-                }
-            }
-        }
-        function reportFileNamesDifferOnlyInCasingError(fileName, existingFileName, refFile, refPos, refEnd) {
-            if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
-                fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
-            }
-            else {
-                fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
-            }
-        }
-        // Get source file from normalized fileName
-        function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) {
-            if (filesByName.contains(path)) {
-                var file_1 = filesByName.get(path);
-                // try to check if we've already seen this file but with a different casing in path
-                // NOTE: this only makes sense for case-insensitive file systems
-                if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
-                    reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
-                }
-                return file_1;
-            }
-            // We haven't looked for this file, do so now and cache result
-            var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
-                if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
-                    fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
-                }
-                else {
-                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
-                }
-            });
-            filesByName.set(path, file);
-            if (file) {
-                file.path = path;
-                if (host.useCaseSensitiveFileNames()) {
-                    // for case-sensitive file systems check if we've already seen some file with similar filename ignoring case
-                    var existingFile = filesByNameIgnoreCase.get(path);
-                    if (existingFile) {
-                        reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd);
-                    }
-                    else {
-                        filesByNameIgnoreCase.set(path, file);
-                    }
-                }
-                skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
-                var basePath = ts.getDirectoryPath(fileName);
-                if (!options.noResolve) {
-                    processReferencedFiles(file, basePath, isDefaultLib);
-                    processTypeReferenceDirectives(file);
-                }
-                // always process imported modules to record module name resolutions
-                processImportedModules(file, basePath);
-                if (isDefaultLib) {
-                    files.unshift(file);
-                }
-                else {
-                    files.push(file);
-                }
-            }
-            return file;
-        }
-        function processReferencedFiles(file, basePath, isDefaultLib) {
-            ts.forEach(file.referencedFiles, function (ref) {
-                var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
-                processSourceFile(referencedFileName, isDefaultLib, /*isReference*/ true, file, ref.pos, ref.end);
-            });
-        }
-        function processTypeReferenceDirectives(file) {
-            var typeDirectives = ts.map(file.typeReferenceDirectives, function (l) { return l.fileName; });
-            var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeDirectives, file.fileName);
-            for (var i = 0; i < typeDirectives.length; i++) {
-                var ref = file.typeReferenceDirectives[i];
-                var resolvedTypeReferenceDirective = resolutions[i];
-                // store resolved type directive on the file
-                ts.setResolvedTypeReferenceDirective(file, ref.fileName, resolvedTypeReferenceDirective);
-                processTypeReferenceDirective(ref.fileName, resolvedTypeReferenceDirective, file, ref.pos, ref.end);
-            }
-        }
-        function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
-            // If we already found this library as a primary reference - nothing to do
-            var previousResolution = resolvedTypeReferenceDirectives[typeReferenceDirective];
-            if (previousResolution && previousResolution.primary) {
-                return;
-            }
-            var saveResolution = true;
-            if (resolvedTypeReferenceDirective) {
-                if (resolvedTypeReferenceDirective.primary) {
-                    // resolved from the primary path
-                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
-                }
-                else {
-                    // If we already resolved to this file, it must have been a secondary reference. Check file contents
-                    // for sameness and possibly issue an error
-                    if (previousResolution) {
-                        var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
-                        if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
-                            fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
-                        }
-                        // don't overwrite previous resolution result
-                        saveResolution = false;
-                    }
-                    else {
-                        // First resolution of this library
-                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
-                    }
-                }
-            }
-            else {
-                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_name_0, typeReferenceDirective));
-            }
-            if (saveResolution) {
-                resolvedTypeReferenceDirectives[typeReferenceDirective] = resolvedTypeReferenceDirective;
-            }
-        }
-        function createDiagnostic(refFile, refPos, refEnd, message) {
-            var args = [];
-            for (var _i = 4; _i < arguments.length; _i++) {
-                args[_i - 4] = arguments[_i];
-            }
-            if (refFile === undefined || refPos === undefined || refEnd === undefined) {
-                return ts.createCompilerDiagnostic.apply(void 0, [message].concat(args));
-            }
-            else {
-                return ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, message].concat(args));
-            }
-        }
-        function getCanonicalFileName(fileName) {
-            return host.getCanonicalFileName(fileName);
-        }
-        function processImportedModules(file, basePath) {
-            collectExternalModuleReferences(file);
-            if (file.imports.length || file.moduleAugmentations.length) {
-                file.resolvedModules = {};
-                var moduleNames = ts.map(ts.concatenate(file.imports, file.moduleAugmentations), getTextOfLiteral);
-                var resolutions = resolveModuleNamesWorker(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory));
-                for (var i = 0; i < moduleNames.length; i++) {
-                    var resolution = resolutions[i];
-                    ts.setResolvedModule(file, moduleNames[i], resolution);
-                    // add file to program only if:
-                    // - resolution was successful
-                    // - noResolve is falsy
-                    // - module name comes from the list of imports
-                    var shouldAddFile = resolution &&
-                        !options.noResolve &&
-                        i < file.imports.length;
-                    if (shouldAddFile) {
-                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), /*isDefaultLib*/ false, /*isReference*/ false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
-                    }
-                }
-            }
-            else {
-                // no imports - drop cached module resolutions
-                file.resolvedModules = undefined;
-            }
-            return;
-        }
-        function computeCommonSourceDirectory(sourceFiles) {
-            var fileNames = [];
-            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
-                var file = sourceFiles_2[_i];
-                if (!file.isDeclarationFile) {
-                    fileNames.push(file.fileName);
-                }
-            }
-            return computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName);
-        }
-        function checkSourceFilesBelongToPath(sourceFiles, rootDirectory) {
-            var allFilesBelongToPath = true;
-            if (sourceFiles) {
-                var absoluteRootDirectoryPath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(rootDirectory, currentDirectory));
-                for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
-                    var sourceFile = sourceFiles_3[_i];
-                    if (!ts.isDeclarationFile(sourceFile)) {
-                        var absoluteSourceFilePath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
-                        if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
-                            programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
-                            allFilesBelongToPath = false;
-                        }
-                    }
-                }
-            }
-            return allFilesBelongToPath;
-        }
-        function verifyCompilerOptions() {
-            if (options.isolatedModules) {
-                if (options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules"));
-                }
-                if (options.noEmitOnError) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules"));
-                }
-                if (options.out) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules"));
-                }
-                if (options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules"));
-                }
-            }
-            if (options.inlineSourceMap) {
-                if (options.sourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap"));
-                }
-                if (options.mapRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap"));
-                }
-            }
-            if (options.paths && options.baseUrl === undefined) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option));
-            }
-            if (options.paths) {
-                for (var key in options.paths) {
-                    if (!ts.hasProperty(options.paths, key)) {
-                        continue;
-                    }
-                    if (!hasZeroOrOneAsteriskCharacter(key)) {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key));
-                    }
-                    if (ts.isArray(options.paths[key])) {
-                        for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
-                            var subst = _a[_i];
-                            var typeOfSubst = typeof subst;
-                            if (typeOfSubst === "string") {
-                                if (!hasZeroOrOneAsteriskCharacter(subst)) {
-                                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key));
-                                }
-                            }
-                            else {
-                                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst));
-                            }
-                        }
-                    }
-                    else {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
-                    }
-                }
-            }
-            if (options.inlineSources) {
-                if (!options.sourceMap && !options.inlineSourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided));
-                }
-                if (options.sourceRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceRoot", "inlineSources"));
-                }
-            }
-            if (options.out && options.outFile) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
-            }
-            if (!options.sourceMap && (options.mapRoot || options.sourceRoot)) {
-                // Error to specify --mapRoot or --sourceRoot without mapSourceFiles
-                if (options.mapRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
-                }
-                if (options.sourceRoot && !options.inlineSourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "sourceRoot", "sourceMap"));
-                }
-            }
-            if (options.declarationDir) {
-                if (!options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration"));
-                }
-                if (options.out || options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile"));
-                }
-            }
-            if (options.lib && options.noLib) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib"));
-            }
-            var languageVersion = options.target || 0 /* ES3 */;
-            var outFile = options.outFile || options.out;
-            var firstExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) ? f : undefined; });
-            if (options.isolatedModules) {
-                if (options.module === ts.ModuleKind.None && languageVersion < 2 /* ES6 */) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
-                }
-                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
-                if (firstNonExternalModuleSourceFile) {
-                    var span = ts.getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
-                    programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
-                }
-            }
-            else if (firstExternalModuleSourceFile && languageVersion < 2 /* ES6 */ && options.module === ts.ModuleKind.None) {
-                // We cannot use createDiagnosticFromNode because nodes do not have parents yet
-                var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
-            }
-            // Cannot specify module gen target of es6 when below es6
-            if (options.module === ts.ModuleKind.ES6 && languageVersion < 2 /* ES6 */) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
-            }
-            // Cannot specify module gen that isn't amd or system with --out
-            if (outFile) {
-                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
-                }
-                else if (options.module === undefined && firstExternalModuleSourceFile) {
-                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
-                }
-            }
-            // there has to be common source directory if user specified --outdir || --sourceRoot
-            // if user specified --mapRoot, there needs to be common source directory if there would be multiple files being emitted
-            if (options.outDir ||
-                options.sourceRoot ||
-                options.mapRoot) {
-                // Precalculate and cache the common source directory
-                var dir = getCommonSourceDirectory();
-                // If we failed to find a good common directory, but outDir is specified and at least one of our files is on a windows drive/URL/other resource, add a failure
-                if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files));
-                }
-            }
-            if (!options.noEmit && options.allowJs && options.declaration) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration"));
-            }
-            if (options.emitDecoratorMetadata &&
-                !options.experimentalDecorators) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators"));
-            }
-            if (options.reactNamespace && !ts.isIdentifier(options.reactNamespace, languageVersion)) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace));
-            }
-            // If the emit is enabled make sure that every output file is unique and not overwriting any of the input files
-            if (!options.noEmit && !options.suppressOutputPathCheck) {
-                var emitHost = getEmitHost();
-                var emitFilesSeen_1 = ts.createFileMap(!host.useCaseSensitiveFileNames() ? function (key) { return key.toLocaleLowerCase(); } : undefined);
-                ts.forEachExpectedEmitFile(emitHost, function (emitFileNames, sourceFiles, isBundledEmit) {
-                    verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen_1);
-                    verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
-                });
-            }
-            // Verify that all the emit files are unique and don't overwrite input files
-            function verifyEmitFilePath(emitFileName, emitFilesSeen) {
-                if (emitFileName) {
-                    var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName);
-                    // Report error if the output overwrites input file
-                    if (filesByName.contains(emitFilePath)) {
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file);
-                    }
-                    // Report error if multiple files write into same file
-                    if (emitFilesSeen.contains(emitFilePath)) {
-                        // Already seen the same emit file - report error
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files);
-                    }
-                    else {
-                        emitFilesSeen.set(emitFilePath, true);
-                    }
-                }
-            }
-        }
-        function createEmitBlockingDiagnostics(emitFileName, emitFilePath, message) {
-            hasEmitBlockingDiagnostics.set(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName), true);
-            programDiagnostics.add(ts.createCompilerDiagnostic(message, emitFileName));
-        }
-    }
-    ts.createProgram = createProgram;
-})(ts || (ts = {}));
-/// <reference path="sys.ts"/>
-/// <reference path="types.ts"/>
-/// <reference path="core.ts"/>
-/// <reference path="diagnosticInformationMap.generated.ts"/>
-/// <reference path="scanner.ts"/>
-var ts;
-(function (ts) {
-    /* @internal */
-    ts.optionDeclarations = [
-        {
-            name: "charset",
-            type: "string"
-        },
-        {
-            name: "declaration",
-            shortName: "d",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_d_ts_file
-        },
-        {
-            name: "declarationDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "diagnostics",
-            type: "boolean"
-        },
-        {
-            name: "emitBOM",
-            type: "boolean"
-        },
-        {
-            name: "help",
-            shortName: "h",
-            type: "boolean",
-            description: ts.Diagnostics.Print_this_message
-        },
-        {
-            name: "help",
-            shortName: "?",
-            type: "boolean"
-        },
-        {
-            name: "init",
-            type: "boolean",
-            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file
-        },
-        {
-            name: "inlineSourceMap",
-            type: "boolean"
-        },
-        {
-            name: "inlineSources",
-            type: "boolean"
-        },
-        {
-            name: "jsx",
-            type: {
-                "preserve": 1 /* Preserve */,
-                "react": 2 /* React */
-            },
-            paramType: ts.Diagnostics.KIND,
-            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_or_react
-        },
-        {
-            name: "reactNamespace",
-            type: "string",
-            description: ts.Diagnostics.Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit
-        },
-        {
-            name: "listFiles",
-            type: "boolean"
-        },
-        {
-            name: "locale",
-            type: "string"
-        },
-        {
-            name: "mapRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
-            paramType: ts.Diagnostics.LOCATION
-        },
-        {
-            name: "module",
-            shortName: "m",
-            type: {
-                "none": ts.ModuleKind.None,
-                "commonjs": ts.ModuleKind.CommonJS,
-                "amd": ts.ModuleKind.AMD,
-                "system": ts.ModuleKind.System,
-                "umd": ts.ModuleKind.UMD,
-                "es6": ts.ModuleKind.ES6,
-                "es2015": ts.ModuleKind.ES2015
-            },
-            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
-            paramType: ts.Diagnostics.KIND
-        },
-        {
-            name: "newLine",
-            type: {
-                "crlf": 0 /* CarriageReturnLineFeed */,
-                "lf": 1 /* LineFeed */
-            },
-            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
-            paramType: ts.Diagnostics.NEWLINE
-        },
-        {
-            name: "noEmit",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs
-        },
-        {
-            name: "noEmitHelpers",
-            type: "boolean"
-        },
-        {
-            name: "noEmitOnError",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported
-        },
-        {
-            name: "noImplicitAny",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type
-        },
-        {
-            name: "noImplicitThis",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type
-        },
-        {
-            name: "noLib",
-            type: "boolean"
-        },
-        {
-            name: "noResolve",
-            type: "boolean"
-        },
-        {
-            name: "skipDefaultLibCheck",
-            type: "boolean"
-        },
-        {
-            name: "skipLibCheck",
-            type: "boolean",
-            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
-        },
-        {
-            name: "out",
-            type: "string",
-            isFilePath: false,
-            // for correct behaviour, please use outFile
-            paramType: ts.Diagnostics.FILE
-        },
-        {
-            name: "outFile",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
-            paramType: ts.Diagnostics.FILE
-        },
-        {
-            name: "outDir",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "preserveConstEnums",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
-        },
-        {
-            name: "pretty",
-            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental,
-            type: "boolean"
-        },
-        {
-            name: "project",
-            shortName: "p",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Compile_the_project_in_the_given_directory,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "removeComments",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_comments_to_output
-        },
-        {
-            name: "rootDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.LOCATION,
-            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir
-        },
-        {
-            name: "isolatedModules",
-            type: "boolean"
-        },
-        {
-            name: "sourceMap",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_map_file
-        },
-        {
-            name: "sourceRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
-            paramType: ts.Diagnostics.LOCATION
-        },
-        {
-            name: "suppressExcessPropertyErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
-            experimental: true
-        },
-        {
-            name: "suppressImplicitAnyIndexErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures
-        },
-        {
-            name: "stripInternal",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
-            experimental: true
-        },
-        {
-            name: "target",
-            shortName: "t",
-            type: {
-                "es3": 0 /* ES3 */,
-                "es5": 1 /* ES5 */,
-                "es6": 2 /* ES6 */,
-                "es2015": 2 /* ES2015 */
-            },
-            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
-            paramType: ts.Diagnostics.VERSION
-        },
-        {
-            name: "version",
-            shortName: "v",
-            type: "boolean",
-            description: ts.Diagnostics.Print_the_compiler_s_version
-        },
-        {
-            name: "watch",
-            shortName: "w",
-            type: "boolean",
-            description: ts.Diagnostics.Watch_input_files
-        },
-        {
-            name: "experimentalDecorators",
-            type: "boolean",
-            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
-        },
-        {
-            name: "emitDecoratorMetadata",
-            type: "boolean",
-            experimental: true,
-            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
-        },
-        {
-            name: "moduleResolution",
-            type: {
-                "node": ts.ModuleResolutionKind.NodeJs,
-                "classic": ts.ModuleResolutionKind.Classic
-            },
-            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6
-        },
-        {
-            name: "allowUnusedLabels",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
-        },
-        {
-            name: "noImplicitReturns",
-            type: "boolean",
-            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
-        },
-        {
-            name: "noFallthroughCasesInSwitch",
-            type: "boolean",
-            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
-        },
-        {
-            name: "allowUnreachableCode",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
-        },
-        {
-            name: "forceConsistentCasingInFileNames",
-            type: "boolean",
-            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
-        },
-        {
-            name: "baseUrl",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
-        },
-        {
-            // this option can only be specified in tsconfig.json
-            // use type = object to copy the value as-is
-            name: "paths",
-            type: "object",
-            isTSConfigOnly: true
-        },
-        {
-            // this option can only be specified in tsconfig.json
-            // use type = object to copy the value as-is
-            name: "rootDirs",
-            type: "list",
-            isTSConfigOnly: true,
-            element: {
-                name: "rootDirs",
-                type: "string",
-                isFilePath: true
-            }
-        },
-        {
-            name: "typesSearchPaths",
-            type: "list",
-            isTSConfigOnly: true,
-            element: {
-                name: "typesSearchPaths",
-                type: "string",
-                isFilePath: true
-            }
-        },
-        {
-            name: "typesRoot",
-            type: "string"
-        },
-        {
-            name: "types",
-            type: "list",
-            element: {
-                name: "types",
-                type: "string"
-            },
-            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
-        },
-        {
-            name: "traceResolution",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
-        },
-        {
-            name: "allowJs",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
-        },
-        {
-            name: "allowSyntheticDefaultImports",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
-        },
-        {
-            name: "noImplicitUseStrict",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
-        },
-        {
-            name: "listEmittedFiles",
-            type: "boolean"
-        },
-        {
-            name: "lib",
-            type: "list",
-            element: {
-                name: "lib",
-                type: {
-                    // JavaScript only
-                    "es5": "lib.es5.d.ts",
-                    "es6": "lib.es2015.d.ts",
-                    "es2015": "lib.es2015.d.ts",
-                    "es7": "lib.es2016.d.ts",
-                    "es2016": "lib.es2016.d.ts",
-                    "es2017": "lib.es2017.d.ts",
-                    // Host only
-                    "dom": "lib.dom.d.ts",
-                    "webworker": "lib.webworker.d.ts",
-                    "scripthost": "lib.scripthost.d.ts",
-                    // ES2015 Or ESNext By-feature options
-                    "es2015.core": "lib.es2015.core.d.ts",
-                    "es2015.collection": "lib.es2015.collection.d.ts",
-                    "es2015.generator": "lib.es2015.generator.d.ts",
-                    "es2015.iterable": "lib.es2015.iterable.d.ts",
-                    "es2015.promise": "lib.es2015.promise.d.ts",
-                    "es2015.proxy": "lib.es2015.proxy.d.ts",
-                    "es2015.reflect": "lib.es2015.reflect.d.ts",
-                    "es2015.symbol": "lib.es2015.symbol.d.ts",
-                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
-                    "es2016.array.include": "lib.es2016.array.include.d.ts",
-                    "es2017.object": "lib.es2017.object.d.ts"
-                }
-            },
-            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
-        },
-        {
-            name: "strictNullChecks",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_strict_null_checks
-        }
-    ];
-    /* @internal */
-    ts.typingOptionDeclarations = [
-        {
-            name: "enableAutoDiscovery",
-            type: "boolean"
-        },
-        {
-            name: "include",
-            type: "list",
-            element: {
-                name: "include",
-                type: "string"
-            }
-        },
-        {
-            name: "exclude",
-            type: "list",
-            element: {
-                name: "exclude",
-                type: "string"
-            }
-        }
-    ];
-    var optionNameMapCache;
-    /* @internal */
-    function getOptionNameMap() {
-        if (optionNameMapCache) {
-            return optionNameMapCache;
-        }
-        var optionNameMap = {};
-        var shortOptionNames = {};
-        ts.forEach(ts.optionDeclarations, function (option) {
-            optionNameMap[option.name.toLowerCase()] = option;
-            if (option.shortName) {
-                shortOptionNames[option.shortName] = option.name;
-            }
-        });
-        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
-        return optionNameMapCache;
-    }
-    ts.getOptionNameMap = getOptionNameMap;
-    /* @internal */
-    function createCompilerDiagnosticForInvalidCustomType(opt) {
-        var namesOfType = [];
-        ts.forEachKey(opt.type, function (key) {
-            namesOfType.push(" '" + key + "'");
-        });
-        return ts.createCompilerDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
-    }
-    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
-    /* @internal */
-    function parseCustomTypeOption(opt, value, errors) {
-        var key = trimString((value || "")).toLowerCase();
-        var map = opt.type;
-        if (ts.hasProperty(map, key)) {
-            return map[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
-    }
-    ts.parseCustomTypeOption = parseCustomTypeOption;
-    /* @internal */
-    function parseListTypeOption(opt, value, errors) {
-        var values = trimString((value || "")).split(",");
-        switch (opt.element.type) {
-            case "number":
-                return ts.map(values, parseInt);
-            case "string":
-                return ts.map(values, function (v) { return v || ""; });
-            default:
-                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
-        }
-    }
-    ts.parseListTypeOption = parseListTypeOption;
-    /* @internal */
-    function parseCommandLine(commandLine, readFile) {
-        var options = {};
-        var fileNames = [];
-        var errors = [];
-        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
-        parseStrings(commandLine);
-        return {
-            options: options,
-            fileNames: fileNames,
-            errors: errors
-        };
-        function parseStrings(args) {
-            var i = 0;
-            while (i < args.length) {
-                var s = args[i];
-                i++;
-                if (s.charCodeAt(0) === 64 /* at */) {
-                    parseResponseFile(s.slice(1));
-                }
-                else if (s.charCodeAt(0) === 45 /* minus */) {
-                    s = s.slice(s.charCodeAt(1) === 45 /* minus */ ? 2 : 1).toLowerCase();
-                    // Try to translate short option names to their full equivalents.
-                    if (ts.hasProperty(shortOptionNames, s)) {
-                        s = shortOptionNames[s];
-                    }
-                    if (ts.hasProperty(optionNameMap, s)) {
-                        var opt = optionNameMap[s];
-                        if (opt.isTSConfigOnly) {
-                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
-                        }
-                        else {
-                            // Check to see if no argument was provided (e.g. "--locale" is the last command-line argument).
-                            if (!args[i] && opt.type !== "boolean") {
-                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
-                            }
-                            switch (opt.type) {
-                                case "number":
-                                    options[opt.name] = parseInt(args[i]);
-                                    i++;
-                                    break;
-                                case "boolean":
-                                    options[opt.name] = true;
-                                    break;
-                                case "string":
-                                    options[opt.name] = args[i] || "";
-                                    i++;
-                                    break;
-                                case "list":
-                                    options[opt.name] = parseListTypeOption(opt, args[i], errors);
-                                    i++;
-                                    break;
-                                // If not a primitive, the possible types are specified in what is effectively a map of options.
-                                default:
-                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
-                                    i++;
-                                    break;
-                            }
-                        }
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
-                    }
-                }
-                else {
-                    fileNames.push(s);
-                }
-            }
-        }
-        function parseResponseFile(fileName) {
-            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
-            if (!text) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
-                return;
-            }
-            var args = [];
-            var pos = 0;
-            while (true) {
-                while (pos < text.length && text.charCodeAt(pos) <= 32 /* space */)
-                    pos++;
-                if (pos >= text.length)
-                    break;
-                var start = pos;
-                if (text.charCodeAt(start) === 34 /* doubleQuote */) {
-                    pos++;
-                    while (pos < text.length && text.charCodeAt(pos) !== 34 /* doubleQuote */)
-                        pos++;
-                    if (pos < text.length) {
-                        args.push(text.substring(start + 1, pos));
-                        pos++;
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
-                    }
-                }
-                else {
-                    while (text.charCodeAt(pos) > 32 /* space */)
-                        pos++;
-                    args.push(text.substring(start, pos));
-                }
-            }
-            parseStrings(args);
-        }
-    }
-    ts.parseCommandLine = parseCommandLine;
-    /**
-      * Read tsconfig.json file
-      * @param fileName The path to the config file
-      */
-    function readConfigFile(fileName, readFile) {
-        var text = "";
-        try {
-            text = readFile(fileName);
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
-        }
-        return parseConfigFileTextToJson(fileName, text);
-    }
-    ts.readConfigFile = readConfigFile;
-    /**
-      * Parse the text of the tsconfig.json file
-      * @param fileName The path to the config file
-      * @param jsonText The text of the config file
-      */
-    function parseConfigFileTextToJson(fileName, jsonText) {
-        try {
-            var jsonTextWithoutComments = removeComments(jsonText);
-            return { config: /\S/.test(jsonTextWithoutComments) ? JSON.parse(jsonTextWithoutComments) : {} };
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) };
-        }
-    }
-    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
-    /**
-     * Remove the comments from a json like text.
-     * Comments can be single line comments (starting with # or //) or multiline comments using / * * /
-     *
-     * This method replace comment content by whitespace rather than completely remove them to keep positions in json parsing error reporting accurate.
-     */
-    function removeComments(jsonText) {
-        var output = "";
-        var scanner = ts.createScanner(1 /* ES5 */, /* skipTrivia */ false, 0 /* Standard */, jsonText);
-        var token;
-        while ((token = scanner.scan()) !== 1 /* EndOfFileToken */) {
-            switch (token) {
-                case 2 /* SingleLineCommentTrivia */:
-                case 3 /* MultiLineCommentTrivia */:
-                    // replace comments with whitespace to preserve original character positions
-                    output += scanner.getTokenText().replace(/\S/g, " ");
-                    break;
-                default:
-                    output += scanner.getTokenText();
-                    break;
-            }
-        }
-        return output;
-    }
-    // Skip over any minified JavaScript files (ending in ".min.js")
-    // Skip over dotted files and folders as well
-    var IgnoreFileNamePattern = /(\.min\.js$)|([\\/]\.[\w.])/;
-    /**
-      * Parse the contents of a config file (tsconfig.json).
-      * @param json The contents of the config file to parse
-      * @param host Instance of ParseConfigHost used to enumerate files in folder.
-      * @param basePath A root directory to resolve relative path entries in the config
-      *    file to. e.g. outDir
-      */
-    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName) {
-        if (existingOptions === void 0) { existingOptions = {}; }
-        var errors = [];
-        var compilerOptions = convertCompilerOptionsFromJsonWorker(json["compilerOptions"], basePath, errors, configFileName);
-        var options = ts.extend(existingOptions, compilerOptions);
-        var typingOptions = convertTypingOptionsFromJsonWorker(json["typingOptions"], basePath, errors, configFileName);
-        options.configFilePath = configFileName;
-        var fileNames = getFileNames(errors);
-        return {
-            options: options,
-            fileNames: fileNames,
-            typingOptions: typingOptions,
-            raw: json,
-            errors: errors
-        };
-        function getFileNames(errors) {
-            var fileNames = [];
-            if (ts.hasProperty(json, "files")) {
-                if (ts.isArray(json["files"])) {
-                    fileNames = ts.map(json["files"], function (s) { return ts.combinePaths(basePath, s); });
-                }
-                else {
-                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
-                }
-            }
-            else {
-                var filesSeen = {};
-                var exclude = [];
-                if (ts.isArray(json["exclude"])) {
-                    exclude = json["exclude"];
-                }
-                else {
-                    // by default exclude node_modules, and any specificied output directory
-                    exclude = ["node_modules", "bower_components", "jspm_packages"];
-                }
-                var outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
-                if (outDir) {
-                    exclude.push(outDir);
-                }
-                exclude = ts.map(exclude, ts.normalizeSlashes);
-                var supportedExtensions = ts.getSupportedExtensions(options);
-                ts.Debug.assert(ts.indexOf(supportedExtensions, ".ts") < ts.indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
-                // Get files of supported extensions in their order of resolution
-                for (var _i = 0, supportedExtensions_1 = supportedExtensions; _i < supportedExtensions_1.length; _i++) {
-                    var extension = supportedExtensions_1[_i];
-                    var filesInDirWithExtension = host.readDirectory(basePath, extension, exclude);
-                    for (var _a = 0, filesInDirWithExtension_1 = filesInDirWithExtension; _a < filesInDirWithExtension_1.length; _a++) {
-                        var fileName = filesInDirWithExtension_1[_a];
-                        // .ts extension would read the .d.ts extension files too but since .d.ts is lower priority extension,
-                        // lets pick them when its turn comes up
-                        if (extension === ".ts" && ts.fileExtensionIs(fileName, ".d.ts")) {
-                            continue;
-                        }
-                        if (IgnoreFileNamePattern.test(fileName)) {
-                            continue;
-                        }
-                        // If this is one of the output extension (which would be .d.ts and .js if we are allowing compilation of js files)
-                        // do not include this file if we included .ts or .tsx file with same base name as it could be output of the earlier compilation
-                        if (extension === ".d.ts" || (options.allowJs && ts.contains(ts.supportedJavascriptExtensions, extension))) {
-                            var baseName = fileName.substr(0, fileName.length - extension.length);
-                            if (ts.hasProperty(filesSeen, baseName + ".ts") || ts.hasProperty(filesSeen, baseName + ".tsx")) {
-                                continue;
-                            }
-                        }
-                        filesSeen[fileName] = true;
-                        fileNames.push(fileName);
-                    }
-                }
-            }
-            if (ts.hasProperty(json, "excludes") && !ts.hasProperty(json, "exclude")) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
-            }
-            return fileNames;
-        }
-    }
-    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
-    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
-    }
-    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
-    function convertTypingOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
-    }
-    ts.convertTypingOptionsFromJson = convertTypingOptionsFromJson;
-    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json" ? { allowJs: true } : {};
-        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
-        return options;
-    }
-    function convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
-            ? { enableAutoDiscovery: true, include: [], exclude: [] }
-            : { enableAutoDiscovery: false, include: [], exclude: [] };
-        convertOptionsFromJson(ts.typingOptionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_typing_option_0, errors);
-        return options;
-    }
-    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
-        if (!jsonOptions) {
-            return;
-        }
-        var optionNameMap = ts.arrayToMap(optionDeclarations, function (opt) { return opt.name; });
-        for (var id in jsonOptions) {
-            if (ts.hasProperty(optionNameMap, id)) {
-                var opt = optionNameMap[id];
-                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
-            }
-            else {
-                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
-            }
-        }
-    }
-    function convertJsonOption(opt, value, basePath, errors) {
-        var optType = opt.type;
-        var expectedType = typeof optType === "string" ? optType : "string";
-        if (optType === "list" && ts.isArray(value)) {
-            return convertJsonOptionOfListType(opt, value, basePath, errors);
-        }
-        else if (typeof value === expectedType) {
-            if (typeof optType !== "string") {
-                return convertJsonOptionOfCustomType(opt, value, errors);
-            }
-            else {
-                if (opt.isFilePath) {
-                    value = ts.normalizePath(ts.combinePaths(basePath, value));
-                    if (value === "") {
-                        value = ".";
-                    }
-                }
-            }
-            return value;
-        }
-        else {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, expectedType));
-        }
-    }
-    function convertJsonOptionOfCustomType(opt, value, errors) {
-        var key = value.toLowerCase();
-        if (ts.hasProperty(opt.type, key)) {
-            return opt.type[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
-    }
-    function convertJsonOptionOfListType(option, values, basePath, errors) {
-        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
-    }
-    function trimString(s) {
-        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
-    }
-})(ts || (ts = {}));
-/* @internal */
-var ts;
-(function (ts) {
-    var OutliningElementsCollector;
-    (function (OutliningElementsCollector) {
-        function collectElements(sourceFile) {
-            var elements = [];
-            var collapseText = "...";
-            function addOutliningSpan(hintSpanNode, startElement, endElement, autoCollapse) {
-                if (hintSpanNode && startElement && endElement) {
-                    var span = {
-                        textSpan: ts.createTextSpanFromBounds(startElement.pos, endElement.end),
-                        hintSpan: ts.createTextSpanFromBounds(hintSpanNode.getStart(), hintSpanNode.end),
-                        bannerText: collapseText,
-                        autoCollapse: autoCollapse
-                    };
-                    elements.push(span);
-                }
-            }
-            function addOutliningSpanComments(commentSpan, autoCollapse) {
-                if (commentSpan) {
-                    var span = {
-                        textSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
-                        hintSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
-                        bannerText: collapseText,
-                        autoCollapse: autoCollapse
-                    };
-                    elements.push(span);
-                }
-            }
-            function addOutliningForLeadingCommentsForNode(n) {
-                var comments = ts.getLeadingCommentRangesOfNode(n, sourceFile);
-                if (comments) {
-                    var firstSingleLineCommentStart = -1;
-                    var lastSingleLineCommentEnd = -1;
-                    var isFirstSingleLineComment = true;
-                    var singleLineCommentCount = 0;
-                    for (var _i = 0, comments_2 = comments; _i < comments_2.length; _i++) {
-                        var currentComment = comments_2[_i];
-                        // For single line comments, combine consecutive ones (2 or more) into
-                        // a single span from the start of the first till the end of the last
-                        if (currentComment.kind === 2 /* SingleLineCommentTrivia */) {
-                            if (isFirstSingleLineComment) {
-                                firstSingleLineCommentStart = currentComment.pos;
-                            }
-                            isFirstSingleLineComment = false;
-                            lastSingleLineCommentEnd = currentComment.end;
-                            singleLineCommentCount++;
-                        }
-                        else if (currentComment.kind === 3 /* MultiLineCommentTrivia */) {
-                            combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
-                            addOutliningSpanComments(currentComment, /*autoCollapse*/ false);
-                            singleLineCommentCount = 0;
-                            lastSingleLineCommentEnd = -1;
-                            isFirstSingleLineComment = true;
-                        }
-                    }
-                    combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
-                }
-            }
-            function combineAndAddMultipleSingleLineComments(count, start, end) {
-                // Only outline spans of two or more consecutive single line comments
-                if (count > 1) {
-                    var multipleSingleLineComments = {
-                        pos: start,
-                        end: end,
-                        kind: 2 /* SingleLineCommentTrivia */
-                    };
-                    addOutliningSpanComments(multipleSingleLineComments, /*autoCollapse*/ false);
-                }
-            }
-            function autoCollapse(node) {
-                return ts.isFunctionBlock(node) && node.parent.kind !== 180 /* ArrowFunction */;
-            }
-            var depth = 0;
-            var maxDepth = 20;
-            function walk(n) {
-                if (depth > maxDepth) {
-                    return;
-                }
-                if (ts.isDeclaration(n)) {
-                    addOutliningForLeadingCommentsForNode(n);
-                }
-                switch (n.kind) {
-                    case 199 /* Block */:
-                        if (!ts.isFunctionBlock(n)) {
-                            var parent_14 = n.parent;
-                            var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
-                            var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
-                            // Check if the block is standalone, or 'attached' to some parent statement.
-                            // If the latter, we want to collapse the block, but consider its hint span
-                            // to be the entire span of the parent.
-                            if (parent_14.kind === 204 /* DoStatement */ ||
-                                parent_14.kind === 207 /* ForInStatement */ ||
-                                parent_14.kind === 208 /* ForOfStatement */ ||
-                                parent_14.kind === 206 /* ForStatement */ ||
-                                parent_14.kind === 203 /* IfStatement */ ||
-                                parent_14.kind === 205 /* WhileStatement */ ||
-                                parent_14.kind === 212 /* WithStatement */ ||
-                                parent_14.kind === 252 /* CatchClause */) {
-                                addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
-                                break;
-                            }
-                            if (parent_14.kind === 216 /* TryStatement */) {
-                                // Could be the try-block, or the finally-block.
-                                var tryStatement = parent_14;
-                                if (tryStatement.tryBlock === n) {
-                                    addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
-                                    break;
-                                }
-                                else if (tryStatement.finallyBlock === n) {
-                                    var finallyKeyword = ts.findChildOfKind(tryStatement, 85 /* FinallyKeyword */, sourceFile);
-                                    if (finallyKeyword) {
-                                        addOutliningSpan(finallyKeyword, openBrace, closeBrace, autoCollapse(n));
-                                        break;
-                                    }
-                                }
-                            }
-                            // Block was a standalone block.  In this case we want to only collapse
-                            // the span of the block, independent of any parent span.
-                            var span = ts.createTextSpanFromBounds(n.getStart(), n.end);
-                            elements.push({
-                                textSpan: span,
-                                hintSpan: span,
-                                bannerText: collapseText,
-                                autoCollapse: autoCollapse(n)
-                            });
-                            break;
-                        }
-                    // Fallthrough.
-                    case 226 /* ModuleBlock */: {
-                        var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
-                        var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
-                        addOutliningSpan(n.parent, openBrace, closeBrace, autoCollapse(n));
-                        break;
-                    }
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 171 /* ObjectLiteralExpression */:
-                    case 227 /* CaseBlock */: {
-                        var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
-                        var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
-                        addOutliningSpan(n, openBrace, closeBrace, autoCollapse(n));
-                        break;
-                    }
-                    case 170 /* ArrayLiteralExpression */:
-                        var openBracket = ts.findChildOfKind(n, 19 /* OpenBracketToken */, sourceFile);
-                        var closeBracket = ts.findChildOfKind(n, 20 /* CloseBracketToken */, sourceFile);
-                        addOutliningSpan(n, openBracket, closeBracket, autoCollapse(n));
-                        break;
-                }
-                depth++;
-                ts.forEachChild(n, walk);
-                depth--;
-            }
-            walk(sourceFile);
-            return elements;
-        }
-        OutliningElementsCollector.collectElements = collectElements;
-    })(OutliningElementsCollector = ts.OutliningElementsCollector || (ts.OutliningElementsCollector = {}));
-})(ts || (ts = {}));
-/* @internal */
-var ts;
-(function (ts) {
-    var NavigateTo;
-    (function (NavigateTo) {
-        function getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount) {
-            var patternMatcher = ts.createPatternMatcher(searchValue);
-            var rawItems = [];
-            // This means "compare in a case insensitive manner."
-            var baseSensitivity = { sensitivity: "base" };
-            // Search the declarations in all files and output matched NavigateToItem into array of NavigateToItem[] 
-            ts.forEach(program.getSourceFiles(), function (sourceFile) {
-                cancellationToken.throwIfCancellationRequested();
-                var nameToDeclarations = sourceFile.getNamedDeclarations();
-                for (var name_34 in nameToDeclarations) {
-                    var declarations = ts.getProperty(nameToDeclarations, name_34);
-                    if (declarations) {
-                        // First do a quick check to see if the name of the declaration matches the 
-                        // last portion of the (possibly) dotted name they're searching for.
-                        var matches = patternMatcher.getMatchesForLastSegmentOfPattern(name_34);
-                        if (!matches) {
-                            continue;
-                        }
-                        for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
-                            var declaration = declarations_7[_i];
-                            // It was a match!  If the pattern has dots in it, then also see if the 
-                            // declaration container matches as well.
-                            if (patternMatcher.patternContainsDots) {
-                                var containers = getContainers(declaration);
-                                if (!containers) {
-                                    return undefined;
-                                }
-                                matches = patternMatcher.getMatches(containers, name_34);
-                                if (!matches) {
-                                    continue;
-                                }
-                            }
-                            var fileName = sourceFile.fileName;
-                            var matchKind = bestMatchKind(matches);
-                            rawItems.push({ name: name_34, fileName: fileName, matchKind: matchKind, isCaseSensitive: allMatchesAreCaseSensitive(matches), declaration: declaration });
-                        }
-                    }
-                }
-            });
-            // Remove imports when the imported declaration is already in the list and has the same name.
-            rawItems = ts.filter(rawItems, function (item) {
-                var decl = item.declaration;
-                if (decl.kind === 231 /* ImportClause */ || decl.kind === 234 /* ImportSpecifier */ || decl.kind === 229 /* ImportEqualsDeclaration */) {
-                    var importer = checker.getSymbolAtLocation(decl.name);
-                    var imported = checker.getAliasedSymbol(importer);
-                    return importer.name !== imported.name;
-                }
-                else {
-                    return true;
-                }
-            });
-            rawItems.sort(compareNavigateToItems);
-            if (maxResultCount !== undefined) {
-                rawItems = rawItems.slice(0, maxResultCount);
-            }
-            var items = ts.map(rawItems, createNavigateToItem);
-            return items;
-            function allMatchesAreCaseSensitive(matches) {
-                ts.Debug.assert(matches.length > 0);
-                // This is a case sensitive match, only if all the submatches were case sensitive.
-                for (var _i = 0, matches_1 = matches; _i < matches_1.length; _i++) {
-                    var match = matches_1[_i];
-                    if (!match.isCaseSensitive) {
-                        return false;
-                    }
-                }
-                return true;
-            }
-            function getTextOfIdentifierOrLiteral(node) {
-                if (node) {
-                    if (node.kind === 69 /* Identifier */ ||
-                        node.kind === 9 /* StringLiteral */ ||
-                        node.kind === 8 /* NumericLiteral */) {
-                        return node.text;
-                    }
-                }
-                return undefined;
-            }
-            function tryAddSingleDeclarationName(declaration, containers) {
-                if (declaration && declaration.name) {
-                    var text = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (text !== undefined) {
-                        containers.unshift(text);
-                    }
-                    else if (declaration.name.kind === 140 /* ComputedPropertyName */) {
-                        return tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ true);
-                    }
-                    else {
-                        // Don't know how to add this.
-                        return false;
-                    }
-                }
-                return true;
-            }
-            // Only added the names of computed properties if they're simple dotted expressions, like:
-            //
-            //      [X.Y.Z]() { }
-            function tryAddComputedPropertyName(expression, containers, includeLastPortion) {
-                var text = getTextOfIdentifierOrLiteral(expression);
-                if (text !== undefined) {
-                    if (includeLastPortion) {
-                        containers.unshift(text);
-                    }
-                    return true;
-                }
-                if (expression.kind === 172 /* PropertyAccessExpression */) {
-                    var propertyAccess = expression;
-                    if (includeLastPortion) {
-                        containers.unshift(propertyAccess.name.text);
-                    }
-                    return tryAddComputedPropertyName(propertyAccess.expression, containers, /*includeLastPortion*/ true);
-                }
-                return false;
-            }
-            function getContainers(declaration) {
-                var containers = [];
-                // First, if we started with a computed property name, then add all but the last
-                // portion into the container array.
-                if (declaration.name.kind === 140 /* ComputedPropertyName */) {
-                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ false)) {
-                        return undefined;
-                    }
-                }
-                // Now, walk up our containers, adding all their names to the container array.
-                declaration = ts.getContainerNode(declaration);
-                while (declaration) {
-                    if (!tryAddSingleDeclarationName(declaration, containers)) {
-                        return undefined;
-                    }
-                    declaration = ts.getContainerNode(declaration);
-                }
-                return containers;
-            }
-            function bestMatchKind(matches) {
-                ts.Debug.assert(matches.length > 0);
-                var bestMatchKind = ts.PatternMatchKind.camelCase;
-                for (var _i = 0, matches_2 = matches; _i < matches_2.length; _i++) {
-                    var match = matches_2[_i];
-                    var kind = match.kind;
-                    if (kind < bestMatchKind) {
-                        bestMatchKind = kind;
-                    }
-                }
-                return bestMatchKind;
-            }
-            function compareNavigateToItems(i1, i2) {
-                // TODO(cyrusn): get the gamut of comparisons that VS already uses here.
-                // Right now we just sort by kind first, and then by name of the item.
-                // We first sort case insensitively.  So "Aaa" will come before "bar".
-                // Then we sort case sensitively, so "aaa" will come before "Aaa".
-                return i1.matchKind - i2.matchKind ||
-                    i1.name.localeCompare(i2.name, undefined, baseSensitivity) ||
-                    i1.name.localeCompare(i2.name);
-            }
-            function createNavigateToItem(rawItem) {
-                var declaration = rawItem.declaration;
-                var container = ts.getContainerNode(declaration);
-                return {
-                    name: rawItem.name,
-                    kind: ts.getNodeKind(declaration),
-                    kindModifiers: ts.getNodeModifiers(declaration),
-                    matchKind: ts.PatternMatchKind[rawItem.matchKind],
-                    isCaseSensitive: rawItem.isCaseSensitive,
-                    fileName: rawItem.fileName,
-                    textSpan: ts.createTextSpanFromBounds(declaration.getStart(), declaration.getEnd()),
-                    // TODO(jfreeman): What should be the containerName when the container has a computed name?
-                    containerName: container && container.name ? container.name.text : "",
-                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
-                };
-            }
-        }
-        NavigateTo.getNavigateToItems = getNavigateToItems;
-    })(NavigateTo = ts.NavigateTo || (ts.NavigateTo = {}));
-})(ts || (ts = {}));
-/// <reference path='services.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var NavigationBar;
-    (function (NavigationBar) {
-        function getNavigationBarItems(sourceFile, compilerOptions) {
-            // TODO: Handle JS files differently in 'navbar' calls for now, but ideally we should unify
-            // the 'navbar' and 'navto' logic for TypeScript and JavaScript.
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                return getJsNavigationBarItems(sourceFile, compilerOptions);
-            }
-            // If the source file has any child items, then it included in the tree
-            // and takes lexical ownership of all other top-level items.
-            var hasGlobalNode = false;
-            return getItemsWorker(getTopLevelNodes(sourceFile), createTopLevelItem);
-            function getIndent(node) {
-                // If we have a global node in the tree,
-                // then it adds an extra layer of depth to all subnodes.
-                var indent = hasGlobalNode ? 1 : 0;
-                var current = node.parent;
-                while (current) {
-                    switch (current.kind) {
-                        case 225 /* ModuleDeclaration */:
-                            // If we have a module declared as A.B.C, it is more "intuitive"
-                            // to say it only has a single layer of depth
-                            do {
-                                current = current.parent;
-                            } while (current.kind === 225 /* ModuleDeclaration */);
-                        // fall through
-                        case 221 /* ClassDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                        case 220 /* FunctionDeclaration */:
-                            indent++;
-                    }
-                    current = current.parent;
-                }
-                return indent;
-            }
-            function getChildNodes(nodes) {
-                var childNodes = [];
-                function visit(node) {
-                    switch (node.kind) {
-                        case 200 /* VariableStatement */:
-                            ts.forEach(node.declarationList.declarations, visit);
-                            break;
-                        case 167 /* ObjectBindingPattern */:
-                        case 168 /* ArrayBindingPattern */:
-                            ts.forEach(node.elements, visit);
-                            break;
-                        case 236 /* ExportDeclaration */:
-                            // Handle named exports case e.g.:
-                            //    export {a, b as B} from "mod";
-                            if (node.exportClause) {
-                                ts.forEach(node.exportClause.elements, visit);
-                            }
-                            break;
-                        case 230 /* ImportDeclaration */:
-                            var importClause = node.importClause;
-                            if (importClause) {
-                                // Handle default import case e.g.:
-                                //    import d from "mod";
-                                if (importClause.name) {
-                                    childNodes.push(importClause);
-                                }
-                                // Handle named bindings in imports e.g.:
-                                //    import * as NS from "mod";
-                                //    import {a, b as B} from "mod";
-                                if (importClause.namedBindings) {
-                                    if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                                        childNodes.push(importClause.namedBindings);
-                                    }
-                                    else {
-                                        ts.forEach(importClause.namedBindings.elements, visit);
-                                    }
-                                }
-                            }
-                            break;
-                        case 169 /* BindingElement */:
-                        case 218 /* VariableDeclaration */:
-                            if (ts.isBindingPattern(node.name)) {
-                                visit(node.name);
-                                break;
-                            }
-                        // Fall through
-                        case 221 /* ClassDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                        case 225 /* ModuleDeclaration */:
-                        case 220 /* FunctionDeclaration */:
-                        case 229 /* ImportEqualsDeclaration */:
-                        case 234 /* ImportSpecifier */:
-                        case 238 /* ExportSpecifier */:
-                            childNodes.push(node);
-                            break;
-                    }
-                }
-                // for (let i = 0, n = nodes.length; i < n; i++) {
-                //    let node = nodes[i];
-                //    if (node.kind === SyntaxKind.ClassDeclaration ||
-                //        node.kind === SyntaxKind.EnumDeclaration ||
-                //        node.kind === SyntaxKind.InterfaceDeclaration ||
-                //        node.kind === SyntaxKind.ModuleDeclaration ||
-                //        node.kind === SyntaxKind.FunctionDeclaration) {
-                //        childNodes.push(node);
-                //    }
-                //    else if (node.kind === SyntaxKind.VariableStatement) {
-                //        childNodes.push.apply(childNodes, (<VariableStatement>node).declarations);
-                //    }
-                // }
-                ts.forEach(nodes, visit);
-                return sortNodes(childNodes);
-            }
-            function getTopLevelNodes(node) {
-                var topLevelNodes = [];
-                topLevelNodes.push(node);
-                addTopLevelNodes(node.statements, topLevelNodes);
-                return topLevelNodes;
-            }
-            function sortNodes(nodes) {
-                return nodes.slice(0).sort(function (n1, n2) {
-                    if (n1.name && n2.name) {
-                        return ts.getPropertyNameForPropertyNameNode(n1.name).localeCompare(ts.getPropertyNameForPropertyNameNode(n2.name));
-                    }
-                    else if (n1.name) {
-                        return 1;
-                    }
-                    else if (n2.name) {
-                        return -1;
-                    }
-                    else {
-                        return n1.kind - n2.kind;
-                    }
-                });
-            }
-            function addTopLevelNodes(nodes, topLevelNodes) {
-                nodes = sortNodes(nodes);
-                for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
-                    var node = nodes_4[_i];
-                    switch (node.kind) {
-                        case 221 /* ClassDeclaration */:
-                            topLevelNodes.push(node);
-                            for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                                var member = _b[_a];
-                                if (member.kind === 147 /* MethodDeclaration */ || member.kind === 148 /* Constructor */) {
-                                    if (member.body) {
-                                        // We do not include methods that does not have child functions in it, because of duplications.
-                                        if (hasNamedFunctionDeclarations(member.body.statements)) {
-                                            topLevelNodes.push(member);
-                                        }
-                                        addTopLevelNodes(member.body.statements, topLevelNodes);
-                                    }
-                                }
-                            }
-                            break;
-                        case 224 /* EnumDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                        case 223 /* TypeAliasDeclaration */:
-                            topLevelNodes.push(node);
-                            break;
-                        case 225 /* ModuleDeclaration */:
-                            var moduleDeclaration = node;
-                            topLevelNodes.push(node);
-                            addTopLevelNodes(getInnermostModule(moduleDeclaration).body.statements, topLevelNodes);
-                            break;
-                        case 220 /* FunctionDeclaration */:
-                            var functionDeclaration = node;
-                            if (isTopLevelFunctionDeclaration(functionDeclaration)) {
-                                topLevelNodes.push(node);
-                                addTopLevelNodes(functionDeclaration.body.statements, topLevelNodes);
-                            }
-                            break;
-                    }
-                }
-            }
-            function hasNamedFunctionDeclarations(nodes) {
-                for (var _i = 0, nodes_5 = nodes; _i < nodes_5.length; _i++) {
-                    var s = nodes_5[_i];
-                    if (s.kind === 220 /* FunctionDeclaration */ && !isEmpty(s.name.text)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function isTopLevelFunctionDeclaration(functionDeclaration) {
-                if (functionDeclaration.kind === 220 /* FunctionDeclaration */) {
-                    // A function declaration is 'top level' if it contains any function declarations
-                    // within it.
-                    if (functionDeclaration.body && functionDeclaration.body.kind === 199 /* Block */) {
-                        // Proper function declarations can only have identifier names
-                        if (hasNamedFunctionDeclarations(functionDeclaration.body.statements)) {
-                            return true;
-                        }
-                        // Or if it is not parented by another function. I.e all functions at module scope are 'top level'.
-                        if (!ts.isFunctionBlock(functionDeclaration.parent)) {
-                            return true;
-                        }
-                        else {
-                            // We have made sure that a grand parent node exists with 'isFunctionBlock()' above.
-                            var grandParentKind = functionDeclaration.parent.parent.kind;
-                            if (grandParentKind === 147 /* MethodDeclaration */ ||
-                                grandParentKind === 148 /* Constructor */) {
-                                return true;
-                            }
-                        }
-                    }
-                }
-                return false;
-            }
-            function getItemsWorker(nodes, createItem) {
-                var items = [];
-                var keyToItem = {};
-                for (var _i = 0, nodes_6 = nodes; _i < nodes_6.length; _i++) {
-                    var child = nodes_6[_i];
-                    var item = createItem(child);
-                    if (item !== undefined) {
-                        if (item.text.length > 0) {
-                            var key = item.text + "-" + item.kind + "-" + item.indent;
-                            var itemWithSameName = keyToItem[key];
-                            if (itemWithSameName) {
-                                // We had an item with the same name.  Merge these items together.
-                                merge(itemWithSameName, item);
-                            }
-                            else {
-                                keyToItem[key] = item;
-                                items.push(item);
-                            }
-                        }
-                    }
-                }
-                return items;
-            }
-            function merge(target, source) {
-                // First, add any spans in the source to the target.
-                ts.addRange(target.spans, source.spans);
-                if (source.childItems) {
-                    if (!target.childItems) {
-                        target.childItems = [];
-                    }
-                    // Next, recursively merge or add any children in the source as appropriate.
-                    outer: for (var _i = 0, _a = source.childItems; _i < _a.length; _i++) {
-                        var sourceChild = _a[_i];
-                        for (var _b = 0, _c = target.childItems; _b < _c.length; _b++) {
-                            var targetChild = _c[_b];
-                            if (targetChild.text === sourceChild.text && targetChild.kind === sourceChild.kind) {
-                                // Found a match.  merge them.
-                                merge(targetChild, sourceChild);
-                                continue outer;
-                            }
-                        }
-                        // Didn't find a match, just add this child to the list.
-                        target.childItems.push(sourceChild);
-                    }
-                }
-            }
-            function createChildItem(node) {
-                switch (node.kind) {
-                    case 142 /* Parameter */:
-                        if (ts.isBindingPattern(node.name)) {
-                            break;
-                        }
-                        if ((node.flags & 1023 /* Modifier */) === 0) {
-                            return undefined;
-                        }
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberFunctionElement);
-                    case 149 /* GetAccessor */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberGetAccessorElement);
-                    case 150 /* SetAccessor */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberSetAccessorElement);
-                    case 153 /* IndexSignature */:
-                        return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
-                    case 224 /* EnumDeclaration */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.enumElement);
-                    case 255 /* EnumMember */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
-                    case 222 /* InterfaceDeclaration */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.interfaceElement);
-                    case 151 /* CallSignature */:
-                        return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
-                    case 152 /* ConstructSignature */:
-                        return createItem(node, "new()", ts.ScriptElementKind.constructSignatureElement);
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
-                    case 220 /* FunctionDeclaration */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.functionElement);
-                    case 218 /* VariableDeclaration */:
-                    case 169 /* BindingElement */:
-                        var variableDeclarationNode = void 0;
-                        var name_35;
-                        if (node.kind === 169 /* BindingElement */) {
-                            name_35 = node.name;
-                            variableDeclarationNode = node;
-                            // binding elements are added only for variable declarations
-                            // bubble up to the containing variable declaration
-                            while (variableDeclarationNode && variableDeclarationNode.kind !== 218 /* VariableDeclaration */) {
-                                variableDeclarationNode = variableDeclarationNode.parent;
-                            }
-                            ts.Debug.assert(variableDeclarationNode !== undefined);
-                        }
-                        else {
-                            ts.Debug.assert(!ts.isBindingPattern(node.name));
-                            variableDeclarationNode = node;
-                            name_35 = node.name;
-                        }
-                        if (ts.isConst(variableDeclarationNode)) {
-                            return createItem(node, getTextOfNode(name_35), ts.ScriptElementKind.constElement);
-                        }
-                        else if (ts.isLet(variableDeclarationNode)) {
-                            return createItem(node, getTextOfNode(name_35), ts.ScriptElementKind.letElement);
-                        }
-                        else {
-                            return createItem(node, getTextOfNode(name_35), ts.ScriptElementKind.variableElement);
-                        }
-                    case 148 /* Constructor */:
-                        return createItem(node, "constructor", ts.ScriptElementKind.constructorImplementationElement);
-                    case 238 /* ExportSpecifier */:
-                    case 234 /* ImportSpecifier */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 231 /* ImportClause */:
-                    case 232 /* NamespaceImport */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.alias);
-                }
-                return undefined;
-                function createItem(node, name, scriptElementKind) {
-                    return getNavigationBarItem(name, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)]);
-                }
-            }
-            function isEmpty(text) {
-                return !text || text.trim() === "";
-            }
-            function getNavigationBarItem(text, kind, kindModifiers, spans, childItems, indent) {
-                if (childItems === void 0) { childItems = []; }
-                if (indent === void 0) { indent = 0; }
-                if (isEmpty(text)) {
-                    return undefined;
-                }
-                return {
-                    text: text,
-                    kind: kind,
-                    kindModifiers: kindModifiers,
-                    spans: spans,
-                    childItems: childItems,
-                    indent: indent,
-                    bolded: false,
-                    grayed: false
-                };
-            }
-            function createTopLevelItem(node) {
-                switch (node.kind) {
-                    case 256 /* SourceFile */:
-                        return createSourceFileItem(node);
-                    case 221 /* ClassDeclaration */:
-                        return createClassItem(node);
-                    case 147 /* MethodDeclaration */:
-                    case 148 /* Constructor */:
-                        return createMemberFunctionLikeItem(node);
-                    case 224 /* EnumDeclaration */:
-                        return createEnumItem(node);
-                    case 222 /* InterfaceDeclaration */:
-                        return createInterfaceItem(node);
-                    case 225 /* ModuleDeclaration */:
-                        return createModuleItem(node);
-                    case 220 /* FunctionDeclaration */:
-                        return createFunctionItem(node);
-                    case 223 /* TypeAliasDeclaration */:
-                        return createTypeAliasItem(node);
-                }
-                return undefined;
-                function getModuleName(moduleDeclaration) {
-                    // We want to maintain quotation marks.
-                    if (ts.isAmbientModule(moduleDeclaration)) {
-                        return getTextOfNode(moduleDeclaration.name);
-                    }
-                    // Otherwise, we need to aggregate each identifier to build up the qualified name.
-                    var result = [];
-                    result.push(moduleDeclaration.name.text);
-                    while (moduleDeclaration.body && moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) {
-                        moduleDeclaration = moduleDeclaration.body;
-                        result.push(moduleDeclaration.name.text);
-                    }
-                    return result.join(".");
-                }
-                function createModuleItem(node) {
-                    var moduleName = getModuleName(node);
-                    var childItems = getItemsWorker(getChildNodes(getInnermostModule(node).body.statements), createChildItem);
-                    return getNavigationBarItem(moduleName, ts.ScriptElementKind.moduleElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-                function createFunctionItem(node) {
-                    if (node.body && node.body.kind === 199 /* Block */) {
-                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
-                        return getNavigationBarItem(!node.name ? "default" : node.name.text, ts.ScriptElementKind.functionElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                    }
-                    return undefined;
-                }
-                function createTypeAliasItem(node) {
-                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.typeElement, ts.getNodeModifiers(node), [getNodeSpan(node)], [], getIndent(node));
-                }
-                function createMemberFunctionLikeItem(node) {
-                    if (node.body && node.body.kind === 199 /* Block */) {
-                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
-                        var scriptElementKind = void 0;
-                        var memberFunctionName = void 0;
-                        if (node.kind === 147 /* MethodDeclaration */) {
-                            memberFunctionName = ts.getPropertyNameForPropertyNameNode(node.name);
-                            scriptElementKind = ts.ScriptElementKind.memberFunctionElement;
-                        }
-                        else {
-                            memberFunctionName = "constructor";
-                            scriptElementKind = ts.ScriptElementKind.constructorImplementationElement;
-                        }
-                        return getNavigationBarItem(memberFunctionName, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                    }
-                    return undefined;
-                }
-                function createSourceFileItem(node) {
-                    var childItems = getItemsWorker(getChildNodes(node.statements), createChildItem);
-                    if (childItems === undefined || childItems.length === 0) {
-                        return undefined;
-                    }
-                    hasGlobalNode = true;
-                    var rootName = ts.isExternalModule(node)
-                        ? "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(node.fileName)))) + "\""
-                        : "<global>";
-                    return getNavigationBarItem(rootName, ts.ScriptElementKind.moduleElement, ts.ScriptElementKindModifier.none, [getNodeSpan(node)], childItems);
-                }
-                function createClassItem(node) {
-                    var childItems;
-                    if (node.members) {
-                        var constructor = ts.forEach(node.members, function (member) {
-                            return member.kind === 148 /* Constructor */ && member;
-                        });
-                        // Add the constructor parameters in as children of the class (for property parameters).
-                        // Note that *all non-binding pattern named* parameters will be added to the nodes array, but parameters that
-                        // are not properties will be filtered out later by createChildItem.
-                        var nodes = removeDynamicallyNamedProperties(node);
-                        if (constructor) {
-                            ts.addRange(nodes, ts.filter(constructor.parameters, function (p) { return !ts.isBindingPattern(p.name); }));
-                        }
-                        childItems = getItemsWorker(sortNodes(nodes), createChildItem);
-                    }
-                    var nodeName = !node.name ? "default" : node.name.text;
-                    return getNavigationBarItem(nodeName, ts.ScriptElementKind.classElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-                function createEnumItem(node) {
-                    var childItems = getItemsWorker(sortNodes(removeComputedProperties(node)), createChildItem);
-                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.enumElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-                function createInterfaceItem(node) {
-                    var childItems = getItemsWorker(sortNodes(removeDynamicallyNamedProperties(node)), createChildItem);
-                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.interfaceElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-            }
-            function removeComputedProperties(node) {
-                return ts.filter(node.members, function (member) { return member.name === undefined || member.name.kind !== 140 /* ComputedPropertyName */; });
-            }
-            /**
-             * Like removeComputedProperties, but retains the properties with well known symbol names
-             */
-            function removeDynamicallyNamedProperties(node) {
-                return ts.filter(node.members, function (member) { return !ts.hasDynamicName(member); });
-            }
-            function getInnermostModule(node) {
-                while (node.body.kind === 225 /* ModuleDeclaration */) {
-                    node = node.body;
-                }
-                return node;
-            }
-            function getNodeSpan(node) {
-                return node.kind === 256 /* SourceFile */
-                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
-            }
-            function getTextOfNode(node) {
-                return ts.getTextOfNodeFromSourceText(sourceFile.text, node);
-            }
-        }
-        NavigationBar.getNavigationBarItems = getNavigationBarItems;
-        function getJsNavigationBarItems(sourceFile, compilerOptions) {
-            var anonFnText = "<function>";
-            var anonClassText = "<class>";
-            var indent = 0;
-            var rootName = ts.isExternalModule(sourceFile) ?
-                "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(sourceFile.fileName)))) + "\""
-                : "<global>";
-            var sourceFileItem = getNavBarItem(rootName, ts.ScriptElementKind.moduleElement, [getNodeSpan(sourceFile)]);
-            var topItem = sourceFileItem;
-            // Walk the whole file, because we want to also find function expressions - which may be in variable initializer,
-            // call arguments, expressions, etc...
-            ts.forEachChild(sourceFile, visitNode);
-            function visitNode(node) {
-                var newItem = createNavBarItem(node);
-                if (newItem) {
-                    topItem.childItems.push(newItem);
-                }
-                // Add a level if traversing into a container
-                if (newItem && (ts.isFunctionLike(node) || ts.isClassLike(node))) {
-                    var lastTop = topItem;
-                    indent++;
-                    topItem = newItem;
-                    ts.forEachChild(node, visitNode);
-                    topItem = lastTop;
-                    indent--;
-                    // If the last item added was an anonymous function expression, and it had no children, discard it.
-                    if (newItem && newItem.text === anonFnText && newItem.childItems.length === 0) {
-                        topItem.childItems.pop();
-                    }
-                }
-                else {
-                    ts.forEachChild(node, visitNode);
-                }
-            }
-            function createNavBarItem(node) {
-                switch (node.kind) {
-                    case 218 /* VariableDeclaration */:
-                        // Only add to the navbar if at the top-level of the file
-                        // Note: "const" and "let" are also SyntaxKind.VariableDeclarations
-                        if (node.parent /*VariableDeclarationList*/.parent /*VariableStatement*/
-                            .parent /*SourceFile*/.kind !== 256 /* SourceFile */) {
-                            return undefined;
-                        }
-                        // If it is initialized with a function expression, handle it when we reach the function expression node
-                        var varDecl = node;
-                        if (varDecl.initializer && (varDecl.initializer.kind === 179 /* FunctionExpression */ ||
-                            varDecl.initializer.kind === 180 /* ArrowFunction */ ||
-                            varDecl.initializer.kind === 192 /* ClassExpression */)) {
-                            return undefined;
-                        }
-                    // Fall through
-                    case 220 /* FunctionDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        // "export default function().." looks just like a regular function/class declaration, except with the 'default' flag
-                        var name_36 = node.flags && (node.flags & 512 /* Default */) && !node.name ? "default" :
-                            node.kind === 148 /* Constructor */ ? "constructor" :
-                                ts.declarationNameToString(node.name);
-                        return getNavBarItem(name_36, getScriptKindForElementKind(node.kind), [getNodeSpan(node)]);
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 192 /* ClassExpression */:
-                        return getDefineModuleItem(node) || getFunctionOrClassExpressionItem(node);
-                    case 147 /* MethodDeclaration */:
-                        var methodDecl = node;
-                        return getNavBarItem(ts.declarationNameToString(methodDecl.name), ts.ScriptElementKind.memberFunctionElement, [getNodeSpan(node)]);
-                    case 235 /* ExportAssignment */:
-                        // e.g. "export default <expr>"
-                        return getNavBarItem("default", ts.ScriptElementKind.variableElement, [getNodeSpan(node)]);
-                    case 231 /* ImportClause */:
-                        if (!node.name) {
-                            // No default import (this node is still a parent of named & namespace imports, which are handled below)
-                            return undefined;
-                        }
-                    // fall through
-                    case 234 /* ImportSpecifier */: // e.g. 'id' in: import {id} from 'mod' (in NamedImports, in ImportClause)
-                    case 232 /* NamespaceImport */: // e.g. '* as ns' in: import * as ns from 'mod' (in ImportClause)
-                    case 238 /* ExportSpecifier */:
-                        // Export specifiers are only interesting if they are reexports from another module, or renamed, else they are already globals
-                        if (node.kind === 238 /* ExportSpecifier */) {
-                            if (!node.parent.parent.moduleSpecifier && !node.propertyName) {
-                                return undefined;
-                            }
-                        }
-                        var decl = node;
-                        if (!decl.name) {
-                            return undefined;
-                        }
-                        var declName = ts.declarationNameToString(decl.name);
-                        return getNavBarItem(declName, ts.ScriptElementKind.constElement, [getNodeSpan(node)]);
-                    default:
-                        return undefined;
-                }
-            }
-            function getNavBarItem(text, kind, spans, kindModifiers) {
-                if (kindModifiers === void 0) { kindModifiers = ts.ScriptElementKindModifier.none; }
-                return {
-                    text: text, kind: kind, kindModifiers: kindModifiers, spans: spans, childItems: [], indent: indent, bolded: false, grayed: false
-                };
-            }
-            function getDefineModuleItem(node) {
-                if (node.kind !== 179 /* FunctionExpression */ && node.kind !== 180 /* ArrowFunction */) {
-                    return undefined;
-                }
-                // No match if this is not a call expression to an identifier named 'define'
-                if (node.parent.kind !== 174 /* CallExpression */) {
-                    return undefined;
-                }
-                var callExpr = node.parent;
-                if (callExpr.expression.kind !== 69 /* Identifier */ || callExpr.expression.getText() !== "define") {
-                    return undefined;
-                }
-                // Return a module of either the given text in the first argument, or of the source file path
-                var defaultName = node.getSourceFile().fileName;
-                if (callExpr.arguments[0].kind === 9 /* StringLiteral */) {
-                    defaultName = (callExpr.arguments[0]).text;
-                }
-                return getNavBarItem(defaultName, ts.ScriptElementKind.moduleElement, [getNodeSpan(node.parent)]);
-            }
-            function getFunctionOrClassExpressionItem(node) {
-                if (node.kind !== 179 /* FunctionExpression */ &&
-                    node.kind !== 180 /* ArrowFunction */ &&
-                    node.kind !== 192 /* ClassExpression */) {
-                    return undefined;
-                }
-                var fnExpr = node;
-                var fnName;
-                if (fnExpr.name && ts.getFullWidth(fnExpr.name) > 0) {
-                    // The expression has an identifier, so use that as the name
-                    fnName = ts.declarationNameToString(fnExpr.name);
-                }
-                else {
-                    // See if it is a var initializer. If so, use the var name.
-                    if (fnExpr.parent.kind === 218 /* VariableDeclaration */) {
-                        fnName = ts.declarationNameToString(fnExpr.parent.name);
-                    }
-                    else if (fnExpr.parent.kind === 187 /* BinaryExpression */ &&
-                        fnExpr.parent.operatorToken.kind === 56 /* EqualsToken */) {
-                        fnName = fnExpr.parent.left.getText();
-                    }
-                    else if (fnExpr.parent.kind === 253 /* PropertyAssignment */ &&
-                        fnExpr.parent.name) {
-                        fnName = fnExpr.parent.name.getText();
-                    }
-                    else {
-                        fnName = node.kind === 192 /* ClassExpression */ ? anonClassText : anonFnText;
-                    }
-                }
-                var scriptKind = node.kind === 192 /* ClassExpression */ ? ts.ScriptElementKind.classElement : ts.ScriptElementKind.functionElement;
-                return getNavBarItem(fnName, scriptKind, [getNodeSpan(node)]);
-            }
-            function getNodeSpan(node) {
-                return node.kind === 256 /* SourceFile */
-                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
-            }
-            function getScriptKindForElementKind(kind) {
-                switch (kind) {
-                    case 218 /* VariableDeclaration */:
-                        return ts.ScriptElementKind.variableElement;
-                    case 220 /* FunctionDeclaration */:
-                        return ts.ScriptElementKind.functionElement;
-                    case 221 /* ClassDeclaration */:
-                        return ts.ScriptElementKind.classElement;
-                    case 148 /* Constructor */:
-                        return ts.ScriptElementKind.constructorImplementationElement;
-                    case 149 /* GetAccessor */:
-                        return ts.ScriptElementKind.memberGetAccessorElement;
-                    case 150 /* SetAccessor */:
-                        return ts.ScriptElementKind.memberSetAccessorElement;
-                    default:
-                        return "unknown";
-                }
-            }
-            return sourceFileItem.childItems;
-        }
-        NavigationBar.getJsNavigationBarItems = getJsNavigationBarItems;
-    })(NavigationBar = ts.NavigationBar || (ts.NavigationBar = {}));
-})(ts || (ts = {}));
-/* @internal */
-var ts;
-(function (ts) {
-    // Note(cyrusn): this enum is ordered from strongest match type to weakest match type.
-    (function (PatternMatchKind) {
-        PatternMatchKind[PatternMatchKind["exact"] = 0] = "exact";
-        PatternMatchKind[PatternMatchKind["prefix"] = 1] = "prefix";
-        PatternMatchKind[PatternMatchKind["substring"] = 2] = "substring";
-        PatternMatchKind[PatternMatchKind["camelCase"] = 3] = "camelCase";
-    })(ts.PatternMatchKind || (ts.PatternMatchKind = {}));
-    var PatternMatchKind = ts.PatternMatchKind;
-    function createPatternMatch(kind, punctuationStripped, isCaseSensitive, camelCaseWeight) {
-        return {
-            kind: kind,
-            punctuationStripped: punctuationStripped,
-            isCaseSensitive: isCaseSensitive,
-            camelCaseWeight: camelCaseWeight
-        };
-    }
-    function createPatternMatcher(pattern) {
-        // We'll often see the same candidate string many times when searching (For example, when
-        // we see the name of a module that is used everywhere, or the name of an overload).  As
-        // such, we cache the information we compute about the candidate for the life of this
-        // pattern matcher so we don't have to compute it multiple times.
-        var stringToWordSpans = {};
-        pattern = pattern.trim();
-        var dotSeparatedSegments = pattern.split(".").map(function (p) { return createSegment(p.trim()); });
-        var invalidPattern = dotSeparatedSegments.length === 0 || ts.forEach(dotSeparatedSegments, segmentIsInvalid);
-        return {
-            getMatches: getMatches,
-            getMatchesForLastSegmentOfPattern: getMatchesForLastSegmentOfPattern,
-            patternContainsDots: dotSeparatedSegments.length > 1
-        };
-        // Quick checks so we can bail out when asked to match a candidate.
-        function skipMatch(candidate) {
-            return invalidPattern || !candidate;
-        }
-        function getMatchesForLastSegmentOfPattern(candidate) {
-            if (skipMatch(candidate)) {
-                return undefined;
-            }
-            return matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
-        }
-        function getMatches(candidateContainers, candidate) {
-            if (skipMatch(candidate)) {
-                return undefined;
-            }
-            // First, check that the last part of the dot separated pattern matches the name of the
-            // candidate.  If not, then there's no point in proceeding and doing the more
-            // expensive work.
-            var candidateMatch = matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
-            if (!candidateMatch) {
-                return undefined;
-            }
-            candidateContainers = candidateContainers || [];
-            // -1 because the last part was checked against the name, and only the rest
-            // of the parts are checked against the container.
-            if (dotSeparatedSegments.length - 1 > candidateContainers.length) {
-                // There weren't enough container parts to match against the pattern parts.
-                // So this definitely doesn't match.
-                return undefined;
-            }
-            // So far so good.  Now break up the container for the candidate and check if all
-            // the dotted parts match up correctly.
-            var totalMatch = candidateMatch;
-            for (var i = dotSeparatedSegments.length - 2, j = candidateContainers.length - 1; i >= 0; i -= 1, j -= 1) {
-                var segment = dotSeparatedSegments[i];
-                var containerName = candidateContainers[j];
-                var containerMatch = matchSegment(containerName, segment);
-                if (!containerMatch) {
-                    // This container didn't match the pattern piece.  So there's no match at all.
-                    return undefined;
-                }
-                ts.addRange(totalMatch, containerMatch);
-            }
-            // Success, this symbol's full name matched against the dotted name the user was asking
-            // about.
-            return totalMatch;
-        }
-        function getWordSpans(word) {
-            if (!ts.hasProperty(stringToWordSpans, word)) {
-                stringToWordSpans[word] = breakIntoWordSpans(word);
-            }
-            return stringToWordSpans[word];
-        }
-        function matchTextChunk(candidate, chunk, punctuationStripped) {
-            var index = indexOfIgnoringCase(candidate, chunk.textLowerCase);
-            if (index === 0) {
-                if (chunk.text.length === candidate.length) {
-                    // a) Check if the part matches the candidate entirely, in an case insensitive or
-                    //    sensitive manner.  If it does, return that there was an exact match.
-                    return createPatternMatch(PatternMatchKind.exact, punctuationStripped, /*isCaseSensitive:*/ candidate === chunk.text);
-                }
-                else {
-                    // b) Check if the part is a prefix of the candidate, in a case insensitive or sensitive
-                    //    manner.  If it does, return that there was a prefix match.
-                    return createPatternMatch(PatternMatchKind.prefix, punctuationStripped, /*isCaseSensitive:*/ startsWith(candidate, chunk.text));
-                }
-            }
-            var isLowercase = chunk.isLowerCase;
-            if (isLowercase) {
-                if (index > 0) {
-                    // c) If the part is entirely lowercase, then check if it is contained anywhere in the
-                    //    candidate in a case insensitive manner.  If so, return that there was a substring
-                    //    match.
-                    //
-                    //    Note: We only have a substring match if the lowercase part is prefix match of some
-                    //    word part. That way we don't match something like 'Class' when the user types 'a'.
-                    //    But we would match 'FooAttribute' (since 'Attribute' starts with 'a').
-                    var wordSpans = getWordSpans(candidate);
-                    for (var _i = 0, wordSpans_1 = wordSpans; _i < wordSpans_1.length; _i++) {
-                        var span = wordSpans_1[_i];
-                        if (partStartsWith(candidate, span, chunk.text, /*ignoreCase:*/ true)) {
-                            return createPatternMatch(PatternMatchKind.substring, punctuationStripped, 
-                            /*isCaseSensitive:*/ partStartsWith(candidate, span, chunk.text, /*ignoreCase:*/ false));
-                        }
-                    }
-                }
-            }
-            else {
-                // d) If the part was not entirely lowercase, then check if it is contained in the
-                //    candidate in a case *sensitive* manner. If so, return that there was a substring
-                //    match.
-                if (candidate.indexOf(chunk.text) > 0) {
-                    return createPatternMatch(PatternMatchKind.substring, punctuationStripped, /*isCaseSensitive:*/ true);
-                }
-            }
-            if (!isLowercase) {
-                // e) If the part was not entirely lowercase, then attempt a camel cased match as well.
-                if (chunk.characterSpans.length > 0) {
-                    var candidateParts = getWordSpans(candidate);
-                    var camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, /*ignoreCase:*/ false);
-                    if (camelCaseWeight !== undefined) {
-                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, /*isCaseSensitive:*/ true, /*camelCaseWeight:*/ camelCaseWeight);
-                    }
-                    camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, /*ignoreCase:*/ true);
-                    if (camelCaseWeight !== undefined) {
-                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, /*isCaseSensitive:*/ false, /*camelCaseWeight:*/ camelCaseWeight);
-                    }
-                }
-            }
-            if (isLowercase) {
-                // f) Is the pattern a substring of the candidate starting on one of the candidate's word boundaries?
-                // We could check every character boundary start of the candidate for the pattern. However, that's
-                // an m * n operation in the wost case. Instead, find the first instance of the pattern
-                // substring, and see if it starts on a capital letter. It seems unlikely that the user will try to
-                // filter the list based on a substring that starts on a capital letter and also with a lowercase one.
-                // (Pattern: fogbar, Candidate: quuxfogbarFogBar).
-                if (chunk.text.length < candidate.length) {
-                    if (index > 0 && isUpperCaseLetter(candidate.charCodeAt(index))) {
-                        return createPatternMatch(PatternMatchKind.substring, punctuationStripped, /*isCaseSensitive:*/ false);
-                    }
-                }
-            }
-            return undefined;
-        }
-        function containsSpaceOrAsterisk(text) {
-            for (var i = 0; i < text.length; i++) {
-                var ch = text.charCodeAt(i);
-                if (ch === 32 /* space */ || ch === 42 /* asterisk */) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function matchSegment(candidate, segment) {
-            // First check if the segment matches as is.  This is also useful if the segment contains
-            // characters we would normally strip when splitting into parts that we also may want to
-            // match in the candidate.  For example if the segment is "@int" and the candidate is
-            // "@int", then that will show up as an exact match here.
-            //
-            // Note: if the segment contains a space or an asterisk then we must assume that it's a
-            // multi-word segment.
-            if (!containsSpaceOrAsterisk(segment.totalTextChunk.text)) {
-                var match = matchTextChunk(candidate, segment.totalTextChunk, /*punctuationStripped:*/ false);
-                if (match) {
-                    return [match];
-                }
-            }
-            // The logic for pattern matching is now as follows:
-            //
-            // 1) Break the segment passed in into words.  Breaking is rather simple and a
-            //    good way to think about it that if gives you all the individual alphanumeric words
-            //    of the pattern.
-            //
-            // 2) For each word try to match the word against the candidate value.
-            //
-            // 3) Matching is as follows:
-            //
-            //   a) Check if the word matches the candidate entirely, in an case insensitive or
-            //    sensitive manner.  If it does, return that there was an exact match.
-            //
-            //   b) Check if the word is a prefix of the candidate, in a case insensitive or
-            //      sensitive manner.  If it does, return that there was a prefix match.
-            //
-            //   c) If the word is entirely lowercase, then check if it is contained anywhere in the
-            //      candidate in a case insensitive manner.  If so, return that there was a substring
-            //      match.
-            //
-            //      Note: We only have a substring match if the lowercase part is prefix match of
-            //      some word part. That way we don't match something like 'Class' when the user
-            //      types 'a'. But we would match 'FooAttribute' (since 'Attribute' starts with
-            //      'a').
-            //
-            //   d) If the word was not entirely lowercase, then check if it is contained in the
-            //      candidate in a case *sensitive* manner. If so, return that there was a substring
-            //      match.
-            //
-            //   e) If the word was not entirely lowercase, then attempt a camel cased match as
-            //      well.
-            //
-            //   f) The word is all lower case. Is it a case insensitive substring of the candidate starting
-            //      on a part boundary of the candidate?
-            //
-            // Only if all words have some sort of match is the pattern considered matched.
-            var subWordTextChunks = segment.subWordTextChunks;
-            var matches = undefined;
-            for (var _i = 0, subWordTextChunks_1 = subWordTextChunks; _i < subWordTextChunks_1.length; _i++) {
-                var subWordTextChunk = subWordTextChunks_1[_i];
-                // Try to match the candidate with this word
-                var result = matchTextChunk(candidate, subWordTextChunk, /*punctuationStripped:*/ true);
-                if (!result) {
-                    return undefined;
-                }
-                matches = matches || [];
-                matches.push(result);
-            }
-            return matches;
-        }
-        function partStartsWith(candidate, candidateSpan, pattern, ignoreCase, patternSpan) {
-            var patternPartStart = patternSpan ? patternSpan.start : 0;
-            var patternPartLength = patternSpan ? patternSpan.length : pattern.length;
-            if (patternPartLength > candidateSpan.length) {
-                // Pattern part is longer than the candidate part. There can never be a match.
-                return false;
-            }
-            if (ignoreCase) {
-                for (var i = 0; i < patternPartLength; i++) {
-                    var ch1 = pattern.charCodeAt(patternPartStart + i);
-                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
-                    if (toLowerCase(ch1) !== toLowerCase(ch2)) {
-                        return false;
-                    }
-                }
-            }
-            else {
-                for (var i = 0; i < patternPartLength; i++) {
-                    var ch1 = pattern.charCodeAt(patternPartStart + i);
-                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
-                    if (ch1 !== ch2) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        function tryCamelCaseMatch(candidate, candidateParts, chunk, ignoreCase) {
-            var chunkCharacterSpans = chunk.characterSpans;
-            // Note: we may have more pattern parts than candidate parts.  This is because multiple
-            // pattern parts may match a candidate part.  For example "SiUI" against "SimpleUI".
-            // We'll have 3 pattern parts Si/U/I against two candidate parts Simple/UI.  However, U
-            // and I will both match in UI.
-            var currentCandidate = 0;
-            var currentChunkSpan = 0;
-            var firstMatch = undefined;
-            var contiguous = undefined;
-            while (true) {
-                // Let's consider our termination cases
-                if (currentChunkSpan === chunkCharacterSpans.length) {
-                    // We did match! We shall assign a weight to this
-                    var weight = 0;
-                    // Was this contiguous?
-                    if (contiguous) {
-                        weight += 1;
-                    }
-                    // Did we start at the beginning of the candidate?
-                    if (firstMatch === 0) {
-                        weight += 2;
-                    }
-                    return weight;
-                }
-                else if (currentCandidate === candidateParts.length) {
-                    // No match, since we still have more of the pattern to hit
-                    return undefined;
-                }
-                var candidatePart = candidateParts[currentCandidate];
-                var gotOneMatchThisCandidate = false;
-                // Consider the case of matching SiUI against SimpleUIElement. The candidate parts
-                // will be Simple/UI/Element, and the pattern parts will be Si/U/I.  We'll match 'Si'
-                // against 'Simple' first.  Then we'll match 'U' against 'UI'. However, we want to
-                // still keep matching pattern parts against that candidate part.
-                for (; currentChunkSpan < chunkCharacterSpans.length; currentChunkSpan++) {
-                    var chunkCharacterSpan = chunkCharacterSpans[currentChunkSpan];
-                    if (gotOneMatchThisCandidate) {
-                        // We've already gotten one pattern part match in this candidate.  We will
-                        // only continue trying to consumer pattern parts if the last part and this
-                        // part are both upper case.
-                        if (!isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan - 1].start)) ||
-                            !isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan].start))) {
-                            break;
-                        }
-                    }
-                    if (!partStartsWith(candidate, candidatePart, chunk.text, ignoreCase, chunkCharacterSpan)) {
-                        break;
-                    }
-                    gotOneMatchThisCandidate = true;
-                    firstMatch = firstMatch === undefined ? currentCandidate : firstMatch;
-                    // If we were contiguous, then keep that value.  If we weren't, then keep that
-                    // value.  If we don't know, then set the value to 'true' as an initial match is
-                    // obviously contiguous.
-                    contiguous = contiguous === undefined ? true : contiguous;
-                    candidatePart = ts.createTextSpan(candidatePart.start + chunkCharacterSpan.length, candidatePart.length - chunkCharacterSpan.length);
-                }
-                // Check if we matched anything at all.  If we didn't, then we need to unset the
-                // contiguous bit if we currently had it set.
-                // If we haven't set the bit yet, then that means we haven't matched anything so
-                // far, and we don't want to change that.
-                if (!gotOneMatchThisCandidate && contiguous !== undefined) {
-                    contiguous = false;
-                }
-                // Move onto the next candidate.
-                currentCandidate++;
-            }
-        }
-    }
-    ts.createPatternMatcher = createPatternMatcher;
-    function createSegment(text) {
-        return {
-            totalTextChunk: createTextChunk(text),
-            subWordTextChunks: breakPatternIntoTextChunks(text)
-        };
-    }
-    // A segment is considered invalid if we couldn't find any words in it.
-    function segmentIsInvalid(segment) {
-        return segment.subWordTextChunks.length === 0;
-    }
-    function isUpperCaseLetter(ch) {
-        // Fast check for the ascii range.
-        if (ch >= 65 /* A */ && ch <= 90 /* Z */) {
-            return true;
-        }
-        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 2 /* Latest */)) {
-            return false;
-        }
-        // TODO: find a way to determine this for any unicode characters in a
-        // non-allocating manner.
-        var str = String.fromCharCode(ch);
-        return str === str.toUpperCase();
-    }
-    function isLowerCaseLetter(ch) {
-        // Fast check for the ascii range.
-        if (ch >= 97 /* a */ && ch <= 122 /* z */) {
-            return true;
-        }
-        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 2 /* Latest */)) {
-            return false;
-        }
-        // TODO: find a way to determine this for any unicode characters in a
-        // non-allocating manner.
-        var str = String.fromCharCode(ch);
-        return str === str.toLowerCase();
-    }
-    function startsWith(string, search) {
-        for (var i = 0, n = search.length; i < n; i++) {
-            if (string.charCodeAt(i) !== search.charCodeAt(i)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    // Assumes 'value' is already lowercase.
-    function indexOfIgnoringCase(string, value) {
-        for (var i = 0, n = string.length - value.length; i <= n; i++) {
-            if (startsWithIgnoringCase(string, value, i)) {
-                return i;
-            }
-        }
-        return -1;
-    }
-    // Assumes 'value' is already lowercase.
-    function startsWithIgnoringCase(string, value, start) {
-        for (var i = 0, n = value.length; i < n; i++) {
-            var ch1 = toLowerCase(string.charCodeAt(i + start));
-            var ch2 = value.charCodeAt(i);
-            if (ch1 !== ch2) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function toLowerCase(ch) {
-        // Fast convert for the ascii range.
-        if (ch >= 65 /* A */ && ch <= 90 /* Z */) {
-            return 97 /* a */ + (ch - 65 /* A */);
-        }
-        if (ch < 127 /* maxAsciiCharacter */) {
-            return ch;
-        }
-        // TODO: find a way to compute this for any unicode characters in a
-        // non-allocating manner.
-        return String.fromCharCode(ch).toLowerCase().charCodeAt(0);
-    }
-    function isDigit(ch) {
-        // TODO(cyrusn): Find a way to support this for unicode digits.
-        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
-    }
-    function isWordChar(ch) {
-        return isUpperCaseLetter(ch) || isLowerCaseLetter(ch) || isDigit(ch) || ch === 95 /* _ */ || ch === 36 /* $ */;
-    }
-    function breakPatternIntoTextChunks(pattern) {
-        var result = [];
-        var wordStart = 0;
-        var wordLength = 0;
-        for (var i = 0; i < pattern.length; i++) {
-            var ch = pattern.charCodeAt(i);
-            if (isWordChar(ch)) {
-                if (wordLength === 0) {
-                    wordStart = i;
-                }
-                wordLength++;
-            }
-            else {
-                if (wordLength > 0) {
-                    result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
-                    wordLength = 0;
-                }
-            }
-        }
-        if (wordLength > 0) {
-            result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
-        }
-        return result;
-    }
-    function createTextChunk(text) {
-        var textLowerCase = text.toLowerCase();
-        return {
-            text: text,
-            textLowerCase: textLowerCase,
-            isLowerCase: text === textLowerCase,
-            characterSpans: breakIntoCharacterSpans(text)
-        };
-    }
-    /* @internal */ function breakIntoCharacterSpans(identifier) {
-        return breakIntoSpans(identifier, /*word:*/ false);
-    }
-    ts.breakIntoCharacterSpans = breakIntoCharacterSpans;
-    /* @internal */ function breakIntoWordSpans(identifier) {
-        return breakIntoSpans(identifier, /*word:*/ true);
-    }
-    ts.breakIntoWordSpans = breakIntoWordSpans;
-    function breakIntoSpans(identifier, word) {
-        var result = [];
-        var wordStart = 0;
-        for (var i = 1, n = identifier.length; i < n; i++) {
-            var lastIsDigit = isDigit(identifier.charCodeAt(i - 1));
-            var currentIsDigit = isDigit(identifier.charCodeAt(i));
-            var hasTransitionFromLowerToUpper = transitionFromLowerToUpper(identifier, word, i);
-            var hasTransitionFromUpperToLower = transitionFromUpperToLower(identifier, word, i, wordStart);
-            if (charIsPunctuation(identifier.charCodeAt(i - 1)) ||
-                charIsPunctuation(identifier.charCodeAt(i)) ||
-                lastIsDigit !== currentIsDigit ||
-                hasTransitionFromLowerToUpper ||
-                hasTransitionFromUpperToLower) {
-                if (!isAllPunctuation(identifier, wordStart, i)) {
-                    result.push(ts.createTextSpan(wordStart, i - wordStart));
-                }
-                wordStart = i;
-            }
-        }
-        if (!isAllPunctuation(identifier, wordStart, identifier.length)) {
-            result.push(ts.createTextSpan(wordStart, identifier.length - wordStart));
-        }
-        return result;
-    }
-    function charIsPunctuation(ch) {
-        switch (ch) {
-            case 33 /* exclamation */:
-            case 34 /* doubleQuote */:
-            case 35 /* hash */:
-            case 37 /* percent */:
-            case 38 /* ampersand */:
-            case 39 /* singleQuote */:
-            case 40 /* openParen */:
-            case 41 /* closeParen */:
-            case 42 /* asterisk */:
-            case 44 /* comma */:
-            case 45 /* minus */:
-            case 46 /* dot */:
-            case 47 /* slash */:
-            case 58 /* colon */:
-            case 59 /* semicolon */:
-            case 63 /* question */:
-            case 64 /* at */:
-            case 91 /* openBracket */:
-            case 92 /* backslash */:
-            case 93 /* closeBracket */:
-            case 95 /* _ */:
-            case 123 /* openBrace */:
-            case 125 /* closeBrace */:
-                return true;
-        }
-        return false;
-    }
-    function isAllPunctuation(identifier, start, end) {
-        for (var i = start; i < end; i++) {
-            var ch = identifier.charCodeAt(i);
-            // We don't consider _ or $ as punctuation as there may be things with that name.
-            if (!charIsPunctuation(ch) || ch === 95 /* _ */ || ch === 36 /* $ */) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function transitionFromUpperToLower(identifier, word, index, wordStart) {
-        if (word) {
-            // Cases this supports:
-            // 1) IDisposable -> I, Disposable
-            // 2) UIElement -> UI, Element
-            // 3) HTMLDocument -> HTML, Document
-            //
-            // etc.
-            if (index !== wordStart &&
-                index + 1 < identifier.length) {
-                var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
-                var nextIsLower = isLowerCaseLetter(identifier.charCodeAt(index + 1));
-                if (currentIsUpper && nextIsLower) {
-                    // We have a transition from an upper to a lower letter here.  But we only
-                    // want to break if all the letters that preceded are uppercase.  i.e. if we
-                    // have "Foo" we don't want to break that into "F, oo".  But if we have
-                    // "IFoo" or "UIFoo", then we want to break that into "I, Foo" and "UI,
-                    // Foo".  i.e. the last uppercase letter belongs to the lowercase letters
-                    // that follows.  Note: this will make the following not split properly:
-                    // "HELLOthere".  However, these sorts of names do not show up in .Net
-                    // programs.
-                    for (var i = wordStart; i < index; i++) {
-                        if (!isUpperCaseLetter(identifier.charCodeAt(i))) {
-                            return false;
-                        }
-                    }
-                    return true;
-                }
-            }
-        }
-        return false;
-    }
-    function transitionFromLowerToUpper(identifier, word, index) {
-        var lastIsUpper = isUpperCaseLetter(identifier.charCodeAt(index - 1));
-        var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
-        // See if the casing indicates we're starting a new word. Note: if we're breaking on
-        // words, then just seeing an upper case character isn't enough.  Instead, it has to
-        // be uppercase and the previous character can't be uppercase.
-        //
-        // For example, breaking "AddMetadata" on words would make: Add Metadata
-        //
-        // on characters would be: A dd M etadata
-        //
-        // Break "AM" on words would be: AM
-        //
-        // on characters would be: A M
-        //
-        // We break the search string on characters.  But we break the symbol name on words.
-        var transition = word
-            ? (currentIsUpper && !lastIsUpper)
-            : currentIsUpper;
-        return transition;
-    }
-})(ts || (ts = {}));
-///<reference path='services.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var SignatureHelp;
-    (function (SignatureHelp) {
-        // A partially written generic type expression is not guaranteed to have the correct syntax tree. the expression could be parsed as less than/greater than expression or a comma expression
-        // or some other combination depending on what the user has typed so far. For the purposes of signature help we need to consider any location after "<" as a possible generic type reference. 
-        // To do this, the method will back parse the expression starting at the position required. it will try to parse the current expression as a generic type expression, if it did succeed it 
-        // will return the generic identifier that started the expression (e.g. "foo" in "foo<any, |"). It is then up to the caller to ensure that this is a valid generic expression through 
-        // looking up the type. The method will also keep track of the parameter index inside the expression.
-        // public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
-        //    let token = Syntax.findTokenOnLeft(syntaxTree.sourceUnit(), position, /*includeSkippedTokens*/ true);
-        //    if (token && TypeScript.Syntax.hasAncestorOfKind(token, TypeScript.SyntaxKind.TypeParameterList)) {
-        //        // We are in the wrong generic list. bail out
-        //        return null;
-        //    }
-        //    let stack = 0;
-        //    let argumentIndex = 0;
-        //    whileLoop:
-        //    while (token) {
-        //        switch (token.kind()) {
-        //            case TypeScript.SyntaxKind.LessThanToken:
-        //                if (stack === 0) {
-        //                    // Found the beginning of the generic argument expression
-        //                    let lessThanToken = token;
-        //                    token = previousToken(token, /*includeSkippedTokens*/ true);
-        //                    if (!token || token.kind() !== TypeScript.SyntaxKind.IdentifierName) {
-        //                        break whileLoop;
-        //                    }
-        //                    // Found the name, return the data
-        //                    return {
-        //                        genericIdentifer: token,
-        //                        lessThanToken: lessThanToken,
-        //                        argumentIndex: argumentIndex
-        //                    };
-        //                }
-        //                else if (stack < 0) {
-        //                    // Seen one too many less than tokens, bail out
-        //                    break whileLoop;
-        //                }
-        //                else {
-        //                    stack--;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.GreaterThanGreaterThanGreaterThanToken:
-        //                stack++;
-        //            // Intentional fall through
-        //            case TypeScript.SyntaxKind.GreaterThanToken:
-        //                stack++;
-        //                break;
-        //            case TypeScript.SyntaxKind.CommaToken:
-        //                if (stack == 0) {
-        //                    argumentIndex++;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.CloseBraceToken:
-        //                // This can be object type, skip untill we find the matching open brace token
-        //                let unmatchedOpenBraceTokens = 0;
-        //                // Skip untill the matching open brace token
-        //                token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseBraceToken, TypeScript.SyntaxKind.OpenBraceToken);
-        //                if (!token) {
-        //                    // No matching token was found. bail out
-        //                    break whileLoop;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.EqualsGreaterThanToken:
-        //                // This can be a function type or a constructor type. In either case, we want to skip the function definition
-        //                token = previousToken(token, /*includeSkippedTokens*/ true);
-        //                if (token && token.kind() === TypeScript.SyntaxKind.CloseParenToken) {
-        //                    // Skip untill the matching open paren token
-        //                    token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseParenToken, TypeScript.SyntaxKind.OpenParenToken);
-        //                    if (token && token.kind() === TypeScript.SyntaxKind.GreaterThanToken) {
-        //                        // Another generic type argument list, skip it\
-        //                        token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.GreaterThanToken, TypeScript.SyntaxKind.LessThanToken);
-        //                    }
-        //                    if (token && token.kind() === TypeScript.SyntaxKind.NewKeyword) {
-        //                        // In case this was a constructor type, skip the new keyword
-        //                        token = previousToken(token, /*includeSkippedTokens*/ true);
-        //                    }
-        //                    if (!token) {
-        //                        // No matching token was found. bail out
-        //                        break whileLoop;
-        //                    }
-        //                }
-        //                else {
-        //                    // This is not a function type. exit the main loop
-        //                    break whileLoop;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.IdentifierName:
-        //            case TypeScript.SyntaxKind.AnyKeyword:
-        //            case TypeScript.SyntaxKind.NumberKeyword:
-        //            case TypeScript.SyntaxKind.StringKeyword:
-        //            case TypeScript.SyntaxKind.VoidKeyword:
-        //            case TypeScript.SyntaxKind.BooleanKeyword:
-        //            case TypeScript.SyntaxKind.DotToken:
-        //            case TypeScript.SyntaxKind.OpenBracketToken:
-        //            case TypeScript.SyntaxKind.CloseBracketToken:
-        //                // Valid tokens in a type name. Skip.
-        //                break;
-        //            default:
-        //                break whileLoop;
-        //        }
-        //        token = previousToken(token, /*includeSkippedTokens*/ true);
-        //    }
-        //    return null;
-        // }
-        // private static moveBackUpTillMatchingTokenKind(token: TypeScript.ISyntaxToken, tokenKind: TypeScript.SyntaxKind, matchingTokenKind: TypeScript.SyntaxKind): TypeScript.ISyntaxToken {
-        //    if (!token || token.kind() !== tokenKind) {
-        //        throw TypeScript.Errors.invalidOperation();
-        //    }
-        //    // Skip the current token
-        //    token = previousToken(token, /*includeSkippedTokens*/ true);
-        //    let stack = 0;
-        //    while (token) {
-        //        if (token.kind() === matchingTokenKind) {
-        //            if (stack === 0) {
-        //                // Found the matching token, return
-        //                return token;
-        //            }
-        //            else if (stack < 0) {
-        //                // tokens overlapped.. bail out.
-        //                break;
-        //            }
-        //            else {
-        //                stack--;
-        //            }
-        //        }
-        //        else if (token.kind() === tokenKind) {
-        //            stack++;
-        //        }
-        //        // Move back
-        //        token = previousToken(token, /*includeSkippedTokens*/ true);
-        //    }
-        //    // Did not find matching token
-        //    return null;
-        // }
-        var emptyArray = [];
-        var ArgumentListKind;
-        (function (ArgumentListKind) {
-            ArgumentListKind[ArgumentListKind["TypeArguments"] = 0] = "TypeArguments";
-            ArgumentListKind[ArgumentListKind["CallArguments"] = 1] = "CallArguments";
-            ArgumentListKind[ArgumentListKind["TaggedTemplateArguments"] = 2] = "TaggedTemplateArguments";
-        })(ArgumentListKind || (ArgumentListKind = {}));
-        function getSignatureHelpItems(program, sourceFile, position, cancellationToken) {
-            var typeChecker = program.getTypeChecker();
-            // Decide whether to show signature help
-            var startingToken = ts.findTokenOnLeftOfPosition(sourceFile, position);
-            if (!startingToken) {
-                // We are at the beginning of the file
-                return undefined;
-            }
-            var argumentInfo = getContainingArgumentInfo(startingToken);
-            cancellationToken.throwIfCancellationRequested();
-            // Semantic filtering of signature help
-            if (!argumentInfo) {
-                return undefined;
-            }
-            var call = argumentInfo.invocation;
-            var candidates = [];
-            var resolvedSignature = typeChecker.getResolvedSignature(call, candidates);
-            cancellationToken.throwIfCancellationRequested();
-            if (!candidates.length) {
-                // We didn't have any sig help items produced by the TS compiler.  If this is a JS 
-                // file, then see if we can figure out anything better.
-                if (ts.isSourceFileJavaScript(sourceFile)) {
-                    return createJavaScriptSignatureHelpItems(argumentInfo);
-                }
-                return undefined;
-            }
-            return createSignatureHelpItems(candidates, resolvedSignature, argumentInfo);
-            function createJavaScriptSignatureHelpItems(argumentInfo) {
-                if (argumentInfo.invocation.kind !== 174 /* CallExpression */) {
-                    return undefined;
-                }
-                // See if we can find some symbol with the call expression name that has call signatures.
-                var callExpression = argumentInfo.invocation;
-                var expression = callExpression.expression;
-                var name = expression.kind === 69 /* Identifier */
-                    ? expression
-                    : expression.kind === 172 /* PropertyAccessExpression */
-                        ? expression.name
-                        : undefined;
-                if (!name || !name.text) {
-                    return undefined;
-                }
-                var typeChecker = program.getTypeChecker();
-                for (var _i = 0, _a = program.getSourceFiles(); _i < _a.length; _i++) {
-                    var sourceFile_1 = _a[_i];
-                    var nameToDeclarations = sourceFile_1.getNamedDeclarations();
-                    var declarations = ts.getProperty(nameToDeclarations, name.text);
-                    if (declarations) {
-                        for (var _b = 0, declarations_8 = declarations; _b < declarations_8.length; _b++) {
-                            var declaration = declarations_8[_b];
-                            var symbol = declaration.symbol;
-                            if (symbol) {
-                                var type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
-                                if (type) {
-                                    var callSignatures = type.getCallSignatures();
-                                    if (callSignatures && callSignatures.length) {
-                                        return createSignatureHelpItems(callSignatures, callSignatures[0], argumentInfo);
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            /**
-             * Returns relevant information for the argument list and the current argument if we are
-             * in the argument of an invocation; returns undefined otherwise.
-             */
-            function getImmediatelyContainingArgumentInfo(node) {
-                if (node.parent.kind === 174 /* CallExpression */ || node.parent.kind === 175 /* NewExpression */) {
-                    var callExpression = node.parent;
-                    // There are 3 cases to handle:
-                    //   1. The token introduces a list, and should begin a sig help session
-                    //   2. The token is either not associated with a list, or ends a list, so the session should end
-                    //   3. The token is buried inside a list, and should give sig help
-                    //
-                    // The following are examples of each:
-                    //
-                    //    Case 1:
-                    //          foo<#T, U>(#a, b)    -> The token introduces a list, and should begin a sig help session
-                    //    Case 2:
-                    //          fo#o<T, U>#(a, b)#   -> The token is either not associated with a list, or ends a list, so the session should end
-                    //    Case 3:
-                    //          foo<T#, U#>(a#, #b#) -> The token is buried inside a list, and should give sig help
-                    // Find out if 'node' is an argument, a type argument, or neither
-                    if (node.kind === 25 /* LessThanToken */ ||
-                        node.kind === 17 /* OpenParenToken */) {
-                        // Find the list that starts right *after* the < or ( token.
-                        // If the user has just opened a list, consider this item 0.
-                        var list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
-                        var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
-                        ts.Debug.assert(list !== undefined);
-                        return {
-                            kind: isTypeArgList ? 0 /* TypeArguments */ : 1 /* CallArguments */,
-                            invocation: callExpression,
-                            argumentsSpan: getApplicableSpanForArguments(list),
-                            argumentIndex: 0,
-                            argumentCount: getArgumentCount(list)
-                        };
-                    }
-                    // findListItemInfo can return undefined if we are not in parent's argument list
-                    // or type argument list. This includes cases where the cursor is:
-                    //   - To the right of the closing paren, non-substitution template, or template tail.
-                    //   - Between the type arguments and the arguments (greater than token)
-                    //   - On the target of the call (parent.func)
-                    //   - On the 'new' keyword in a 'new' expression
-                    var listItemInfo = ts.findListItemInfo(node);
-                    if (listItemInfo) {
-                        var list = listItemInfo.list;
-                        var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
-                        var argumentIndex = getArgumentIndex(list, node);
-                        var argumentCount = getArgumentCount(list);
-                        ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
-                        return {
-                            kind: isTypeArgList ? 0 /* TypeArguments */ : 1 /* CallArguments */,
-                            invocation: callExpression,
-                            argumentsSpan: getApplicableSpanForArguments(list),
-                            argumentIndex: argumentIndex,
-                            argumentCount: argumentCount
-                        };
-                    }
-                }
-                else if (node.kind === 11 /* NoSubstitutionTemplateLiteral */ && node.parent.kind === 176 /* TaggedTemplateExpression */) {
-                    // Check if we're actually inside the template;
-                    // otherwise we'll fall out and return undefined.
-                    if (ts.isInsideTemplateLiteral(node, position)) {
-                        return getArgumentListInfoForTemplate(node.parent, /*argumentIndex*/ 0);
-                    }
-                }
-                else if (node.kind === 12 /* TemplateHead */ && node.parent.parent.kind === 176 /* TaggedTemplateExpression */) {
-                    var templateExpression = node.parent;
-                    var tagExpression = templateExpression.parent;
-                    ts.Debug.assert(templateExpression.kind === 189 /* TemplateExpression */);
-                    var argumentIndex = ts.isInsideTemplateLiteral(node, position) ? 0 : 1;
-                    return getArgumentListInfoForTemplate(tagExpression, argumentIndex);
-                }
-                else if (node.parent.kind === 197 /* TemplateSpan */ && node.parent.parent.parent.kind === 176 /* TaggedTemplateExpression */) {
-                    var templateSpan = node.parent;
-                    var templateExpression = templateSpan.parent;
-                    var tagExpression = templateExpression.parent;
-                    ts.Debug.assert(templateExpression.kind === 189 /* TemplateExpression */);
-                    // If we're just after a template tail, don't show signature help.
-                    if (node.kind === 14 /* TemplateTail */ && !ts.isInsideTemplateLiteral(node, position)) {
-                        return undefined;
-                    }
-                    var spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
-                    var argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node);
-                    return getArgumentListInfoForTemplate(tagExpression, argumentIndex);
-                }
-                return undefined;
-            }
-            function getArgumentIndex(argumentsList, node) {
-                // The list we got back can include commas.  In the presence of errors it may 
-                // also just have nodes without commas.  For example "Foo(a b c)" will have 3 
-                // args without commas.   We want to find what index we're at.  So we count
-                // forward until we hit ourselves, only incrementing the index if it isn't a
-                // comma.
-                //
-                // Note: the subtlety around trailing commas (in getArgumentCount) does not apply
-                // here.  That's because we're only walking forward until we hit the node we're
-                // on.  In that case, even if we're after the trailing comma, we'll still see
-                // that trailing comma in the list, and we'll have generated the appropriate
-                // arg index.
-                var argumentIndex = 0;
-                var listChildren = argumentsList.getChildren();
-                for (var _i = 0, listChildren_1 = listChildren; _i < listChildren_1.length; _i++) {
-                    var child = listChildren_1[_i];
-                    if (child === node) {
-                        break;
-                    }
-                    if (child.kind !== 24 /* CommaToken */) {
-                        argumentIndex++;
-                    }
-                }
-                return argumentIndex;
-            }
-            function getArgumentCount(argumentsList) {
-                // The argument count for a list is normally the number of non-comma children it has.
-                // For example, if you have "Foo(a,b)" then there will be three children of the arg
-                // list 'a' '<comma>' 'b'.  So, in this case the arg count will be 2.  However, there
-                // is a small subtlety.  If you have  "Foo(a,)", then the child list will just have
-                // 'a' '<comma>'.  So, in the case where the last child is a comma, we increase the
-                // arg count by one to compensate.
-                //
-                // Note: this subtlety only applies to the last comma.  If you had "Foo(a,,"  then 
-                // we'll have:  'a' '<comma>' '<missing>' 
-                // That will give us 2 non-commas.  We then add one for the last comma, givin us an
-                // arg count of 3.
-                var listChildren = argumentsList.getChildren();
-                var argumentCount = ts.countWhere(listChildren, function (arg) { return arg.kind !== 24 /* CommaToken */; });
-                if (listChildren.length > 0 && ts.lastOrUndefined(listChildren).kind === 24 /* CommaToken */) {
-                    argumentCount++;
-                }
-                return argumentCount;
-            }
-            // spanIndex is either the index for a given template span.
-            // This does not give appropriate results for a NoSubstitutionTemplateLiteral
-            function getArgumentIndexForTemplatePiece(spanIndex, node) {
-                // Because the TemplateStringsArray is the first argument, we have to offset each substitution expression by 1.
-                // There are three cases we can encounter:
-                //      1. We are precisely in the template literal (argIndex = 0).
-                //      2. We are in or to the right of the substitution expression (argIndex = spanIndex + 1).
-                //      3. We are directly to the right of the template literal, but because we look for the token on the left,
-                //          not enough to put us in the substitution expression; we should consider ourselves part of
-                //          the *next* span's expression by offsetting the index (argIndex = (spanIndex + 1) + 1).
-                //
-                // Example: f  `# abcd $#{#  1 + 1#  }# efghi ${ #"#hello"#  }  #  `
-                //              ^       ^ ^       ^   ^          ^ ^      ^     ^
-                // Case:        1       1 3       2   1          3 2      2     1
-                ts.Debug.assert(position >= node.getStart(), "Assumed 'position' could not occur before node.");
-                if (ts.isTemplateLiteralKind(node.kind)) {
-                    if (ts.isInsideTemplateLiteral(node, position)) {
-                        return 0;
-                    }
-                    return spanIndex + 2;
-                }
-                return spanIndex + 1;
-            }
-            function getArgumentListInfoForTemplate(tagExpression, argumentIndex) {
-                // argumentCount is either 1 or (numSpans + 1) to account for the template strings array argument.
-                var argumentCount = tagExpression.template.kind === 11 /* NoSubstitutionTemplateLiteral */
-                    ? 1
-                    : tagExpression.template.templateSpans.length + 1;
-                ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
-                return {
-                    kind: 2 /* TaggedTemplateArguments */,
-                    invocation: tagExpression,
-                    argumentsSpan: getApplicableSpanForTaggedTemplate(tagExpression),
-                    argumentIndex: argumentIndex,
-                    argumentCount: argumentCount
-                };
-            }
-            function getApplicableSpanForArguments(argumentsList) {
-                // We use full start and skip trivia on the end because we want to include trivia on
-                // both sides. For example,
-                //
-                //    foo(   /*comment */     a, b, c      /*comment*/     )
-                //        |                                               |
-                //
-                // The applicable span is from the first bar to the second bar (inclusive,
-                // but not including parentheses)
-                var applicableSpanStart = argumentsList.getFullStart();
-                var applicableSpanEnd = ts.skipTrivia(sourceFile.text, argumentsList.getEnd(), /*stopAfterLineBreak*/ false);
-                return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
-            }
-            function getApplicableSpanForTaggedTemplate(taggedTemplate) {
-                var template = taggedTemplate.template;
-                var applicableSpanStart = template.getStart();
-                var applicableSpanEnd = template.getEnd();
-                // We need to adjust the end position for the case where the template does not have a tail.
-                // Otherwise, we will not show signature help past the expression.
-                // For example,
-                //
-                //      `  ${ 1 + 1        foo(10)
-                //       |        |
-                //
-                // This is because a Missing node has no width. However, what we actually want is to include trivia
-                // leading up to the next token in case the user is about to type in a TemplateMiddle or TemplateTail.
-                if (template.kind === 189 /* TemplateExpression */) {
-                    var lastSpan = ts.lastOrUndefined(template.templateSpans);
-                    if (lastSpan.literal.getFullWidth() === 0) {
-                        applicableSpanEnd = ts.skipTrivia(sourceFile.text, applicableSpanEnd, /*stopAfterLineBreak*/ false);
-                    }
-                }
-                return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
-            }
-            function getContainingArgumentInfo(node) {
-                for (var n = node; n.kind !== 256 /* SourceFile */; n = n.parent) {
-                    if (ts.isFunctionBlock(n)) {
-                        return undefined;
-                    }
-                    // If the node is not a subspan of its parent, this is a big problem.
-                    // There have been crashes that might be caused by this violation.
-                    if (n.pos < n.parent.pos || n.end > n.parent.end) {
-                        ts.Debug.fail("Node of kind " + n.kind + " is not a subspan of its parent of kind " + n.parent.kind);
-                    }
-                    var argumentInfo_1 = getImmediatelyContainingArgumentInfo(n);
-                    if (argumentInfo_1) {
-                        return argumentInfo_1;
-                    }
-                }
-                return undefined;
-            }
-            function getChildListThatStartsWithOpenerToken(parent, openerToken, sourceFile) {
-                var children = parent.getChildren(sourceFile);
-                var indexOfOpenerToken = children.indexOf(openerToken);
-                ts.Debug.assert(indexOfOpenerToken >= 0 && children.length > indexOfOpenerToken + 1);
-                return children[indexOfOpenerToken + 1];
-            }
-            /**
-             * The selectedItemIndex could be negative for several reasons.
-             *     1. There are too many arguments for all of the overloads
-             *     2. None of the overloads were type compatible
-             * The solution here is to try to pick the best overload by picking
-             * either the first one that has an appropriate number of parameters,
-             * or the one with the most parameters.
-             */
-            function selectBestInvalidOverloadIndex(candidates, argumentCount) {
-                var maxParamsSignatureIndex = -1;
-                var maxParams = -1;
-                for (var i = 0; i < candidates.length; i++) {
-                    var candidate = candidates[i];
-                    if (candidate.hasRestParameter || candidate.parameters.length >= argumentCount) {
-                        return i;
-                    }
-                    if (candidate.parameters.length > maxParams) {
-                        maxParams = candidate.parameters.length;
-                        maxParamsSignatureIndex = i;
-                    }
-                }
-                return maxParamsSignatureIndex;
-            }
-            function createSignatureHelpItems(candidates, bestSignature, argumentListInfo) {
-                var applicableSpan = argumentListInfo.argumentsSpan;
-                var isTypeParameterList = argumentListInfo.kind === 0 /* TypeArguments */;
-                var invocation = argumentListInfo.invocation;
-                var callTarget = ts.getInvokedExpression(invocation);
-                var callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
-                var callTargetDisplayParts = callTargetSymbol && ts.symbolToDisplayParts(typeChecker, callTargetSymbol, /*enclosingDeclaration*/ undefined, /*meaning*/ undefined);
-                var items = ts.map(candidates, function (candidateSignature) {
-                    var signatureHelpParameters;
-                    var prefixDisplayParts = [];
-                    var suffixDisplayParts = [];
-                    if (callTargetDisplayParts) {
-                        ts.addRange(prefixDisplayParts, callTargetDisplayParts);
-                    }
-                    if (isTypeParameterList) {
-                        prefixDisplayParts.push(ts.punctuationPart(25 /* LessThanToken */));
-                        var typeParameters = candidateSignature.typeParameters;
-                        signatureHelpParameters = typeParameters && typeParameters.length > 0 ? ts.map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
-                        suffixDisplayParts.push(ts.punctuationPart(27 /* GreaterThanToken */));
-                        var parameterParts = ts.mapToDisplayParts(function (writer) {
-                            return typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisType, candidateSignature.parameters, writer, invocation);
-                        });
-                        ts.addRange(suffixDisplayParts, parameterParts);
-                    }
-                    else {
-                        var typeParameterParts = ts.mapToDisplayParts(function (writer) {
-                            return typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation);
-                        });
-                        ts.addRange(prefixDisplayParts, typeParameterParts);
-                        prefixDisplayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
-                        var parameters = candidateSignature.parameters;
-                        signatureHelpParameters = parameters.length > 0 ? ts.map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
-                        suffixDisplayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
-                    }
-                    var returnTypeParts = ts.mapToDisplayParts(function (writer) {
-                        return typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation);
-                    });
-                    ts.addRange(suffixDisplayParts, returnTypeParts);
-                    return {
-                        isVariadic: candidateSignature.hasRestParameter,
-                        prefixDisplayParts: prefixDisplayParts,
-                        suffixDisplayParts: suffixDisplayParts,
-                        separatorDisplayParts: [ts.punctuationPart(24 /* CommaToken */), ts.spacePart()],
-                        parameters: signatureHelpParameters,
-                        documentation: candidateSignature.getDocumentationComment()
-                    };
-                });
-                var argumentIndex = argumentListInfo.argumentIndex;
-                // argumentCount is the *apparent* number of arguments.
-                var argumentCount = argumentListInfo.argumentCount;
-                var selectedItemIndex = candidates.indexOf(bestSignature);
-                if (selectedItemIndex < 0) {
-                    selectedItemIndex = selectBestInvalidOverloadIndex(candidates, argumentCount);
-                }
-                ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
-                return {
-                    items: items,
-                    applicableSpan: applicableSpan,
-                    selectedItemIndex: selectedItemIndex,
-                    argumentIndex: argumentIndex,
-                    argumentCount: argumentCount
-                };
-                function createSignatureHelpParameterForParameter(parameter) {
-                    var displayParts = ts.mapToDisplayParts(function (writer) {
-                        return typeChecker.getSymbolDisplayBuilder().buildParameterDisplay(parameter, writer, invocation);
-                    });
-                    return {
-                        name: parameter.name,
-                        documentation: parameter.getDocumentationComment(),
-                        displayParts: displayParts,
-                        isOptional: typeChecker.isOptionalParameter(parameter.valueDeclaration)
-                    };
-                }
-                function createSignatureHelpParameterForTypeParameter(typeParameter) {
-                    var displayParts = ts.mapToDisplayParts(function (writer) {
-                        return typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(typeParameter, writer, invocation);
-                    });
-                    return {
-                        name: typeParameter.symbol.name,
-                        documentation: emptyArray,
-                        displayParts: displayParts,
-                        isOptional: false
-                    };
-                }
-            }
-        }
-        SignatureHelp.getSignatureHelpItems = getSignatureHelpItems;
-    })(SignatureHelp = ts.SignatureHelp || (ts.SignatureHelp = {}));
-})(ts || (ts = {}));
-// These utilities are common to multiple language service features.
-/* @internal */
-var ts;
-(function (ts) {
-    function getLineStartPositionForPosition(position, sourceFile) {
-        var lineStarts = sourceFile.getLineStarts();
-        var line = sourceFile.getLineAndCharacterOfPosition(position).line;
-        return lineStarts[line];
-    }
-    ts.getLineStartPositionForPosition = getLineStartPositionForPosition;
-    function rangeContainsRange(r1, r2) {
-        return startEndContainsRange(r1.pos, r1.end, r2);
-    }
-    ts.rangeContainsRange = rangeContainsRange;
-    function startEndContainsRange(start, end, range) {
-        return start <= range.pos && end >= range.end;
-    }
-    ts.startEndContainsRange = startEndContainsRange;
-    function rangeContainsStartEnd(range, start, end) {
-        return range.pos <= start && range.end >= end;
-    }
-    ts.rangeContainsStartEnd = rangeContainsStartEnd;
-    function rangeOverlapsWithStartEnd(r1, start, end) {
-        return startEndOverlapsWithStartEnd(r1.pos, r1.end, start, end);
-    }
-    ts.rangeOverlapsWithStartEnd = rangeOverlapsWithStartEnd;
-    function startEndOverlapsWithStartEnd(start1, end1, start2, end2) {
-        var start = Math.max(start1, start2);
-        var end = Math.min(end1, end2);
-        return start < end;
-    }
-    ts.startEndOverlapsWithStartEnd = startEndOverlapsWithStartEnd;
-    function positionBelongsToNode(candidate, position, sourceFile) {
-        return candidate.end > position || !isCompletedNode(candidate, sourceFile);
-    }
-    ts.positionBelongsToNode = positionBelongsToNode;
-    function isCompletedNode(n, sourceFile) {
-        if (ts.nodeIsMissing(n)) {
-            return false;
-        }
-        switch (n.kind) {
-            case 221 /* ClassDeclaration */:
-            case 222 /* InterfaceDeclaration */:
-            case 224 /* EnumDeclaration */:
-            case 171 /* ObjectLiteralExpression */:
-            case 167 /* ObjectBindingPattern */:
-            case 159 /* TypeLiteral */:
-            case 199 /* Block */:
-            case 226 /* ModuleBlock */:
-            case 227 /* CaseBlock */:
-                return nodeEndsWith(n, 16 /* CloseBraceToken */, sourceFile);
-            case 252 /* CatchClause */:
-                return isCompletedNode(n.block, sourceFile);
-            case 175 /* NewExpression */:
-                if (!n.arguments) {
-                    return true;
-                }
-            // fall through
-            case 174 /* CallExpression */:
-            case 178 /* ParenthesizedExpression */:
-            case 164 /* ParenthesizedType */:
-                return nodeEndsWith(n, 18 /* CloseParenToken */, sourceFile);
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
-                return isCompletedNode(n.type, sourceFile);
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 152 /* ConstructSignature */:
-            case 151 /* CallSignature */:
-            case 180 /* ArrowFunction */:
-                if (n.body) {
-                    return isCompletedNode(n.body, sourceFile);
-                }
-                if (n.type) {
-                    return isCompletedNode(n.type, sourceFile);
-                }
-                // Even though type parameters can be unclosed, we can get away with
-                // having at least a closing paren.
-                return hasChildOfKind(n, 18 /* CloseParenToken */, sourceFile);
-            case 225 /* ModuleDeclaration */:
-                return n.body && isCompletedNode(n.body, sourceFile);
-            case 203 /* IfStatement */:
-                if (n.elseStatement) {
-                    return isCompletedNode(n.elseStatement, sourceFile);
-                }
-                return isCompletedNode(n.thenStatement, sourceFile);
-            case 202 /* ExpressionStatement */:
-                return isCompletedNode(n.expression, sourceFile) ||
-                    hasChildOfKind(n, 23 /* SemicolonToken */);
-            case 170 /* ArrayLiteralExpression */:
-            case 168 /* ArrayBindingPattern */:
-            case 173 /* ElementAccessExpression */:
-            case 140 /* ComputedPropertyName */:
-            case 161 /* TupleType */:
-                return nodeEndsWith(n, 20 /* CloseBracketToken */, sourceFile);
-            case 153 /* IndexSignature */:
-                if (n.type) {
-                    return isCompletedNode(n.type, sourceFile);
-                }
-                return hasChildOfKind(n, 20 /* CloseBracketToken */, sourceFile);
-            case 249 /* CaseClause */:
-            case 250 /* DefaultClause */:
-                // there is no such thing as terminator token for CaseClause/DefaultClause so for simplicity always consider them non-completed
-                return false;
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-            case 205 /* WhileStatement */:
-                return isCompletedNode(n.statement, sourceFile);
-            case 204 /* DoStatement */:
-                // rough approximation: if DoStatement has While keyword - then if node is completed is checking the presence of ')';
-                var hasWhileKeyword = findChildOfKind(n, 104 /* WhileKeyword */, sourceFile);
-                if (hasWhileKeyword) {
-                    return nodeEndsWith(n, 18 /* CloseParenToken */, sourceFile);
-                }
-                return isCompletedNode(n.statement, sourceFile);
-            case 158 /* TypeQuery */:
-                return isCompletedNode(n.exprName, sourceFile);
-            case 182 /* TypeOfExpression */:
-            case 181 /* DeleteExpression */:
-            case 183 /* VoidExpression */:
-            case 190 /* YieldExpression */:
-            case 191 /* SpreadElementExpression */:
-                var unaryWordExpression = n;
-                return isCompletedNode(unaryWordExpression.expression, sourceFile);
-            case 176 /* TaggedTemplateExpression */:
-                return isCompletedNode(n.template, sourceFile);
-            case 189 /* TemplateExpression */:
-                var lastSpan = ts.lastOrUndefined(n.templateSpans);
-                return isCompletedNode(lastSpan, sourceFile);
-            case 197 /* TemplateSpan */:
-                return ts.nodeIsPresent(n.literal);
-            case 185 /* PrefixUnaryExpression */:
-                return isCompletedNode(n.operand, sourceFile);
-            case 187 /* BinaryExpression */:
-                return isCompletedNode(n.right, sourceFile);
-            case 188 /* ConditionalExpression */:
-                return isCompletedNode(n.whenFalse, sourceFile);
-            default:
-                return true;
-        }
-    }
-    ts.isCompletedNode = isCompletedNode;
-    /*
-     * Checks if node ends with 'expectedLastToken'.
-     * If child at position 'length - 1' is 'SemicolonToken' it is skipped and 'expectedLastToken' is compared with child at position 'length - 2'.
-     */
-    function nodeEndsWith(n, expectedLastToken, sourceFile) {
-        var children = n.getChildren(sourceFile);
-        if (children.length) {
-            var last = ts.lastOrUndefined(children);
-            if (last.kind === expectedLastToken) {
-                return true;
-            }
-            else if (last.kind === 23 /* SemicolonToken */ && children.length !== 1) {
-                return children[children.length - 2].kind === expectedLastToken;
-            }
-        }
-        return false;
-    }
-    function findListItemInfo(node) {
-        var list = findContainingList(node);
-        // It is possible at this point for syntaxList to be undefined, either if
-        // node.parent had no list child, or if none of its list children contained
-        // the span of node. If this happens, return undefined. The caller should
-        // handle this case.
-        if (!list) {
-            return undefined;
-        }
-        var children = list.getChildren();
-        var listItemIndex = ts.indexOf(children, node);
-        return {
-            listItemIndex: listItemIndex,
-            list: list
-        };
-    }
-    ts.findListItemInfo = findListItemInfo;
-    function hasChildOfKind(n, kind, sourceFile) {
-        return !!findChildOfKind(n, kind, sourceFile);
-    }
-    ts.hasChildOfKind = hasChildOfKind;
-    function findChildOfKind(n, kind, sourceFile) {
-        return ts.forEach(n.getChildren(sourceFile), function (c) { return c.kind === kind && c; });
-    }
-    ts.findChildOfKind = findChildOfKind;
-    function findContainingList(node) {
-        // The node might be a list element (nonsynthetic) or a comma (synthetic). Either way, it will
-        // be parented by the container of the SyntaxList, not the SyntaxList itself.
-        // In order to find the list item index, we first need to locate SyntaxList itself and then search
-        // for the position of the relevant node (or comma).
-        var syntaxList = ts.forEach(node.parent.getChildren(), function (c) {
-            // find syntax list that covers the span of the node
-            if (c.kind === 279 /* SyntaxList */ && c.pos <= node.pos && c.end >= node.end) {
-                return c;
-            }
-        });
-        // Either we didn't find an appropriate list, or the list must contain us.
-        ts.Debug.assert(!syntaxList || ts.contains(syntaxList.getChildren(), node));
-        return syntaxList;
-    }
-    ts.findContainingList = findContainingList;
-    /* Gets the token whose text has range [start, end) and
-     * position >= start and (position < end or (position === end && token is keyword or identifier))
-     */
-    function getTouchingWord(sourceFile, position) {
-        return getTouchingToken(sourceFile, position, function (n) { return isWord(n.kind); });
-    }
-    ts.getTouchingWord = getTouchingWord;
-    /* Gets the token whose text has range [start, end) and position >= start
-     * and (position < end or (position === end && token is keyword or identifier or numeric/string literal))
-     */
-    function getTouchingPropertyName(sourceFile, position) {
-        return getTouchingToken(sourceFile, position, function (n) { return isPropertyName(n.kind); });
-    }
-    ts.getTouchingPropertyName = getTouchingPropertyName;
-    /** Returns the token if position is in [start, end) or if position === end and includeItemAtEndPosition(token) === true */
-    function getTouchingToken(sourceFile, position, includeItemAtEndPosition) {
-        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ false, includeItemAtEndPosition);
-    }
-    ts.getTouchingToken = getTouchingToken;
-    /** Returns a token if position is in [start-of-leading-trivia, end) */
-    function getTokenAtPosition(sourceFile, position) {
-        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includeItemAtEndPosition*/ undefined);
-    }
-    ts.getTokenAtPosition = getTokenAtPosition;
-    /** Get the token whose text contains the position */
-    function getTokenAtPositionWorker(sourceFile, position, allowPositionInLeadingTrivia, includeItemAtEndPosition) {
-        var current = sourceFile;
-        outer: while (true) {
-            if (isToken(current)) {
-                // exit early
-                return current;
-            }
-            // find the child that contains 'position'
-            for (var i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
-                var child = current.getChildAt(i);
-                var start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile);
-                if (start <= position) {
-                    var end = child.getEnd();
-                    if (position < end || (position === end && child.kind === 1 /* EndOfFileToken */)) {
-                        current = child;
-                        continue outer;
-                    }
-                    else if (includeItemAtEndPosition && end === position) {
-                        var previousToken = findPrecedingToken(position, sourceFile, child);
-                        if (previousToken && includeItemAtEndPosition(previousToken)) {
-                            return previousToken;
-                        }
-                    }
-                }
-            }
-            return current;
-        }
-    }
-    /**
-      * The token on the left of the position is the token that strictly includes the position
-      * or sits to the left of the cursor if it is on a boundary. For example
-      *
-      *   fo|o               -> will return foo
-      *   foo <comment> |bar -> will return foo
-      *
-      */
-    function findTokenOnLeftOfPosition(file, position) {
-        // Ideally, getTokenAtPosition should return a token. However, it is currently
-        // broken, so we do a check to make sure the result was indeed a token.
-        var tokenAtPosition = getTokenAtPosition(file, position);
-        if (isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
-            return tokenAtPosition;
-        }
-        return findPrecedingToken(position, file);
-    }
-    ts.findTokenOnLeftOfPosition = findTokenOnLeftOfPosition;
-    function findNextToken(previousToken, parent) {
-        return find(parent);
-        function find(n) {
-            if (isToken(n) && n.pos === previousToken.end) {
-                // this is token that starts at the end of previous token - return it
-                return n;
-            }
-            var children = n.getChildren();
-            for (var _i = 0, children_1 = children; _i < children_1.length; _i++) {
-                var child = children_1[_i];
-                var shouldDiveInChildNode = 
-                // previous token is enclosed somewhere in the child
-                (child.pos <= previousToken.pos && child.end > previousToken.end) ||
-                    // previous token ends exactly at the beginning of child
-                    (child.pos === previousToken.end);
-                if (shouldDiveInChildNode && nodeHasTokens(child)) {
-                    return find(child);
-                }
-            }
-            return undefined;
-        }
-    }
-    ts.findNextToken = findNextToken;
-    function findPrecedingToken(position, sourceFile, startNode) {
-        return find(startNode || sourceFile);
-        function findRightmostToken(n) {
-            if (isToken(n) || n.kind === 244 /* JsxText */) {
-                return n;
-            }
-            var children = n.getChildren();
-            var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
-            return candidate && findRightmostToken(candidate);
-        }
-        function find(n) {
-            if (isToken(n) || n.kind === 244 /* JsxText */) {
-                return n;
-            }
-            var children = n.getChildren();
-            for (var i = 0, len = children.length; i < len; i++) {
-                var child = children[i];
-                // condition 'position < child.end' checks if child node end after the position
-                // in the example below this condition will be false for 'aaaa' and 'bbbb' and true for 'ccc'
-                // aaaa___bbbb___$__ccc
-                // after we found child node with end after the position we check if start of the node is after the position.
-                // if yes - then position is in the trivia and we need to look into the previous child to find the token in question.
-                // if no - position is in the node itself so we should recurse in it.
-                // NOTE: JsxText is a weird kind of node that can contain only whitespaces (since they are not counted as trivia).
-                // if this is the case - then we should assume that token in question is located in previous child.
-                if (position < child.end && (nodeHasTokens(child) || child.kind === 244 /* JsxText */)) {
-                    var start = child.getStart(sourceFile);
-                    var lookInPreviousChild = (start >= position) ||
-                        (child.kind === 244 /* JsxText */ && start === child.end); // whitespace only JsxText
-                    if (lookInPreviousChild) {
-                        // actual start of the node is past the position - previous token should be at the end of previous child
-                        var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ i);
-                        return candidate && findRightmostToken(candidate);
-                    }
-                    else {
-                        // candidate should be in this node
-                        return find(child);
-                    }
-                }
-            }
-            ts.Debug.assert(startNode !== undefined || n.kind === 256 /* SourceFile */);
-            // Here we know that none of child token nodes embrace the position,
-            // the only known case is when position is at the end of the file.
-            // Try to find the rightmost token in the file without filtering.
-            // Namely we are skipping the check: 'position < node.end'
-            if (children.length) {
-                var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
-                return candidate && findRightmostToken(candidate);
-            }
-        }
-        /// finds last node that is considered as candidate for search (isCandidate(node) === true) starting from 'exclusiveStartPosition'
-        function findRightmostChildNodeWithTokens(children, exclusiveStartPosition) {
-            for (var i = exclusiveStartPosition - 1; i >= 0; i--) {
-                if (nodeHasTokens(children[i])) {
-                    return children[i];
-                }
-            }
-        }
-    }
-    ts.findPrecedingToken = findPrecedingToken;
-    function isInString(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        return token && (token.kind === 9 /* StringLiteral */ || token.kind === 166 /* StringLiteralType */) && position > token.getStart(sourceFile);
-    }
-    ts.isInString = isInString;
-    function isInComment(sourceFile, position) {
-        return isInCommentHelper(sourceFile, position, /*predicate*/ undefined);
-    }
-    ts.isInComment = isInComment;
-    /**
-     * returns true if the position is in between the open and close elements of an JSX expression.
-     */
-    function isInsideJsxElementOrAttribute(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        if (!token) {
-            return false;
-        }
-        // <div>Hello |</div>
-        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 244 /* JsxText */) {
-            return true;
-        }
-        // <div> { | </div> or <div a={| </div>
-        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 248 /* JsxExpression */) {
-            return true;
-        }
-        // <div> { 
-        // |
-        // } < /div>
-        if (token && token.kind === 16 /* CloseBraceToken */ && token.parent.kind === 248 /* JsxExpression */) {
-            return true;
-        }
-        // <div>|</div>
-        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 245 /* JsxClosingElement */) {
-            return true;
-        }
-        return false;
-    }
-    ts.isInsideJsxElementOrAttribute = isInsideJsxElementOrAttribute;
-    function isInTemplateString(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        return ts.isTemplateLiteralKind(token.kind) && position > token.getStart(sourceFile);
-    }
-    ts.isInTemplateString = isInTemplateString;
-    /**
-     * Returns true if the cursor at position in sourceFile is within a comment that additionally
-     * satisfies predicate, and false otherwise.
-     */
-    function isInCommentHelper(sourceFile, position, predicate) {
-        var token = getTokenAtPosition(sourceFile, position);
-        if (token && position <= token.getStart(sourceFile)) {
-            var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
-            // The end marker of a single-line comment does not include the newline character.
-            // In the following case, we are inside a comment (^ denotes the cursor position):
-            //
-            //    // asdf   ^\n
-            //
-            // But for multi-line comments, we don't want to be inside the comment in the following case:
-            //
-            //    /* asdf */^
-            //
-            // Internally, we represent the end of the comment at the newline and closing '/', respectively.
-            return predicate ?
-                ts.forEach(commentRanges, function (c) { return c.pos < position &&
-                    (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end) &&
-                    predicate(c); }) :
-                ts.forEach(commentRanges, function (c) { return c.pos < position &&
-                    (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end); });
-        }
-        return false;
-    }
-    ts.isInCommentHelper = isInCommentHelper;
-    function hasDocComment(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        // First, we have to see if this position actually landed in a comment.
-        var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
-        return ts.forEach(commentRanges, jsDocPrefix);
-        function jsDocPrefix(c) {
-            var text = sourceFile.text;
-            return text.length >= c.pos + 3 && text[c.pos] === "/" && text[c.pos + 1] === "*" && text[c.pos + 2] === "*";
-        }
-    }
-    ts.hasDocComment = hasDocComment;
-    /**
-     * Get the corresponding JSDocTag node if the position is in a jsDoc comment
-     */
-    function getJsDocTagAtPosition(sourceFile, position) {
-        var node = ts.getTokenAtPosition(sourceFile, position);
-        if (isToken(node)) {
-            switch (node.kind) {
-                case 102 /* VarKeyword */:
-                case 108 /* LetKeyword */:
-                case 74 /* ConstKeyword */:
-                    // if the current token is var, let or const, skip the VariableDeclarationList
-                    node = node.parent === undefined ? undefined : node.parent.parent;
-                    break;
-                default:
-                    node = node.parent;
-                    break;
-            }
-        }
-        if (node) {
-            var jsDocComment = node.jsDocComment;
-            if (jsDocComment) {
-                for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-                    var tag = _a[_i];
-                    if (tag.pos <= position && position <= tag.end) {
-                        return tag;
-                    }
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getJsDocTagAtPosition = getJsDocTagAtPosition;
-    function nodeHasTokens(n) {
-        // If we have a token or node that has a non-zero width, it must have tokens.
-        // Note, that getWidth() does not take trivia into account.
-        return n.getWidth() !== 0;
-    }
-    function getNodeModifiers(node) {
-        var flags = ts.getCombinedNodeFlags(node);
-        var result = [];
-        if (flags & 8 /* Private */)
-            result.push(ts.ScriptElementKindModifier.privateMemberModifier);
-        if (flags & 16 /* Protected */)
-            result.push(ts.ScriptElementKindModifier.protectedMemberModifier);
-        if (flags & 4 /* Public */)
-            result.push(ts.ScriptElementKindModifier.publicMemberModifier);
-        if (flags & 32 /* Static */)
-            result.push(ts.ScriptElementKindModifier.staticModifier);
-        if (flags & 128 /* Abstract */)
-            result.push(ts.ScriptElementKindModifier.abstractModifier);
-        if (flags & 1 /* Export */)
-            result.push(ts.ScriptElementKindModifier.exportedModifier);
-        if (ts.isInAmbientContext(node))
-            result.push(ts.ScriptElementKindModifier.ambientModifier);
-        return result.length > 0 ? result.join(",") : ts.ScriptElementKindModifier.none;
-    }
-    ts.getNodeModifiers = getNodeModifiers;
-    function getTypeArgumentOrTypeParameterList(node) {
-        if (node.kind === 155 /* TypeReference */ || node.kind === 174 /* CallExpression */) {
-            return node.typeArguments;
-        }
-        if (ts.isFunctionLike(node) || node.kind === 221 /* ClassDeclaration */ || node.kind === 222 /* InterfaceDeclaration */) {
-            return node.typeParameters;
-        }
-        return undefined;
-    }
-    ts.getTypeArgumentOrTypeParameterList = getTypeArgumentOrTypeParameterList;
-    function isToken(n) {
-        return n.kind >= 0 /* FirstToken */ && n.kind <= 138 /* LastToken */;
-    }
-    ts.isToken = isToken;
-    function isWord(kind) {
-        return kind === 69 /* Identifier */ || ts.isKeyword(kind);
-    }
-    ts.isWord = isWord;
-    function isPropertyName(kind) {
-        return kind === 9 /* StringLiteral */ || kind === 8 /* NumericLiteral */ || isWord(kind);
-    }
-    function isComment(kind) {
-        return kind === 2 /* SingleLineCommentTrivia */ || kind === 3 /* MultiLineCommentTrivia */;
-    }
-    ts.isComment = isComment;
-    function isStringOrRegularExpressionOrTemplateLiteral(kind) {
-        if (kind === 9 /* StringLiteral */
-            || kind === 166 /* StringLiteralType */
-            || kind === 10 /* RegularExpressionLiteral */
-            || ts.isTemplateLiteralKind(kind)) {
-            return true;
-        }
-        return false;
-    }
-    ts.isStringOrRegularExpressionOrTemplateLiteral = isStringOrRegularExpressionOrTemplateLiteral;
-    function isPunctuation(kind) {
-        return 15 /* FirstPunctuation */ <= kind && kind <= 68 /* LastPunctuation */;
-    }
-    ts.isPunctuation = isPunctuation;
-    function isInsideTemplateLiteral(node, position) {
-        return ts.isTemplateLiteralKind(node.kind)
-            && (node.getStart() < position && position < node.getEnd()) || (!!node.isUnterminated && position === node.getEnd());
-    }
-    ts.isInsideTemplateLiteral = isInsideTemplateLiteral;
-    function isAccessibilityModifier(kind) {
-        switch (kind) {
-            case 112 /* PublicKeyword */:
-            case 110 /* PrivateKeyword */:
-            case 111 /* ProtectedKeyword */:
-                return true;
-        }
-        return false;
-    }
-    ts.isAccessibilityModifier = isAccessibilityModifier;
-    function compareDataObjects(dst, src) {
-        for (var e in dst) {
-            if (typeof dst[e] === "object") {
-                if (!compareDataObjects(dst[e], src[e])) {
-                    return false;
-                }
-            }
-            else if (typeof dst[e] !== "function") {
-                if (dst[e] !== src[e]) {
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-    ts.compareDataObjects = compareDataObjects;
-    function isArrayLiteralOrObjectLiteralDestructuringPattern(node) {
-        if (node.kind === 170 /* ArrayLiteralExpression */ ||
-            node.kind === 171 /* ObjectLiteralExpression */) {
-            // [a,b,c] from:
-            // [a, b, c] = someExpression;
-            if (node.parent.kind === 187 /* BinaryExpression */ &&
-                node.parent.left === node &&
-                node.parent.operatorToken.kind === 56 /* EqualsToken */) {
-                return true;
-            }
-            // [a, b, c] from:
-            // for([a, b, c] of expression)
-            if (node.parent.kind === 208 /* ForOfStatement */ &&
-                node.parent.initializer === node) {
-                return true;
-            }
-            // [a, b, c] of
-            // [x, [a, b, c] ] = someExpression
-            // or 
-            // {x, a: {a, b, c} } = someExpression
-            if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.kind === 253 /* PropertyAssignment */ ? node.parent.parent : node.parent)) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.isArrayLiteralOrObjectLiteralDestructuringPattern = isArrayLiteralOrObjectLiteralDestructuringPattern;
-})(ts || (ts = {}));
-// Display-part writer helpers
-/* @internal */
-var ts;
-(function (ts) {
-    function isFirstDeclarationOfSymbolParameter(symbol) {
-        return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === 142 /* Parameter */;
-    }
-    ts.isFirstDeclarationOfSymbolParameter = isFirstDeclarationOfSymbolParameter;
-    var displayPartWriter = getDisplayPartWriter();
-    function getDisplayPartWriter() {
-        var displayParts;
-        var lineStart;
-        var indent;
-        resetWriter();
-        return {
-            displayParts: function () { return displayParts; },
-            writeKeyword: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.keyword); },
-            writeOperator: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.operator); },
-            writePunctuation: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.punctuation); },
-            writeSpace: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.space); },
-            writeStringLiteral: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.stringLiteral); },
-            writeParameter: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.parameterName); },
-            writeSymbol: writeSymbol,
-            writeLine: writeLine,
-            increaseIndent: function () { indent++; },
-            decreaseIndent: function () { indent--; },
-            clear: resetWriter,
-            trackSymbol: function () { },
-            reportInaccessibleThisError: function () { }
-        };
-        function writeIndent() {
-            if (lineStart) {
-                var indentString = ts.getIndentString(indent);
-                if (indentString) {
-                    displayParts.push(displayPart(indentString, ts.SymbolDisplayPartKind.space));
-                }
-                lineStart = false;
-            }
-        }
-        function writeKind(text, kind) {
-            writeIndent();
-            displayParts.push(displayPart(text, kind));
-        }
-        function writeSymbol(text, symbol) {
-            writeIndent();
-            displayParts.push(symbolPart(text, symbol));
-        }
-        function writeLine() {
-            displayParts.push(lineBreakPart());
-            lineStart = true;
-        }
-        function resetWriter() {
-            displayParts = [];
-            lineStart = true;
-            indent = 0;
-        }
-    }
-    function symbolPart(text, symbol) {
-        return displayPart(text, displayPartKind(symbol), symbol);
-        function displayPartKind(symbol) {
-            var flags = symbol.flags;
-            if (flags & 3 /* Variable */) {
-                return isFirstDeclarationOfSymbolParameter(symbol) ? ts.SymbolDisplayPartKind.parameterName : ts.SymbolDisplayPartKind.localName;
-            }
-            else if (flags & 4 /* Property */) {
-                return ts.SymbolDisplayPartKind.propertyName;
-            }
-            else if (flags & 32768 /* GetAccessor */) {
-                return ts.SymbolDisplayPartKind.propertyName;
-            }
-            else if (flags & 65536 /* SetAccessor */) {
-                return ts.SymbolDisplayPartKind.propertyName;
-            }
-            else if (flags & 8 /* EnumMember */) {
-                return ts.SymbolDisplayPartKind.enumMemberName;
-            }
-            else if (flags & 16 /* Function */) {
-                return ts.SymbolDisplayPartKind.functionName;
-            }
-            else if (flags & 32 /* Class */) {
-                return ts.SymbolDisplayPartKind.className;
-            }
-            else if (flags & 64 /* Interface */) {
-                return ts.SymbolDisplayPartKind.interfaceName;
-            }
-            else if (flags & 384 /* Enum */) {
-                return ts.SymbolDisplayPartKind.enumName;
-            }
-            else if (flags & 1536 /* Module */) {
-                return ts.SymbolDisplayPartKind.moduleName;
-            }
-            else if (flags & 8192 /* Method */) {
-                return ts.SymbolDisplayPartKind.methodName;
-            }
-            else if (flags & 262144 /* TypeParameter */) {
-                return ts.SymbolDisplayPartKind.typeParameterName;
-            }
-            else if (flags & 524288 /* TypeAlias */) {
-                return ts.SymbolDisplayPartKind.aliasName;
-            }
-            else if (flags & 8388608 /* Alias */) {
-                return ts.SymbolDisplayPartKind.aliasName;
-            }
-            return ts.SymbolDisplayPartKind.text;
-        }
-    }
-    ts.symbolPart = symbolPart;
-    function displayPart(text, kind, symbol) {
-        return {
-            text: text,
-            kind: ts.SymbolDisplayPartKind[kind]
-        };
-    }
-    ts.displayPart = displayPart;
-    function spacePart() {
-        return displayPart(" ", ts.SymbolDisplayPartKind.space);
-    }
-    ts.spacePart = spacePart;
-    function keywordPart(kind) {
-        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.keyword);
-    }
-    ts.keywordPart = keywordPart;
-    function punctuationPart(kind) {
-        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.punctuation);
-    }
-    ts.punctuationPart = punctuationPart;
-    function operatorPart(kind) {
-        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.operator);
-    }
-    ts.operatorPart = operatorPart;
-    function textOrKeywordPart(text) {
-        var kind = ts.stringToToken(text);
-        return kind === undefined
-            ? textPart(text)
-            : keywordPart(kind);
-    }
-    ts.textOrKeywordPart = textOrKeywordPart;
-    function textPart(text) {
-        return displayPart(text, ts.SymbolDisplayPartKind.text);
-    }
-    ts.textPart = textPart;
-    var carriageReturnLineFeed = "\r\n";
-    /**
-     * The default is CRLF.
-     */
-    function getNewLineOrDefaultFromHost(host) {
-        return host.getNewLine ? host.getNewLine() : carriageReturnLineFeed;
-    }
-    ts.getNewLineOrDefaultFromHost = getNewLineOrDefaultFromHost;
-    function lineBreakPart() {
-        return displayPart("\n", ts.SymbolDisplayPartKind.lineBreak);
-    }
-    ts.lineBreakPart = lineBreakPart;
-    function mapToDisplayParts(writeDisplayParts) {
-        writeDisplayParts(displayPartWriter);
-        var result = displayPartWriter.displayParts();
-        displayPartWriter.clear();
-        return result;
-    }
-    ts.mapToDisplayParts = mapToDisplayParts;
-    function typeToDisplayParts(typechecker, type, enclosingDeclaration, flags) {
-        return mapToDisplayParts(function (writer) {
-            typechecker.getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        });
-    }
-    ts.typeToDisplayParts = typeToDisplayParts;
-    function symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration, meaning, flags) {
-        return mapToDisplayParts(function (writer) {
-            typeChecker.getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags);
-        });
-    }
-    ts.symbolToDisplayParts = symbolToDisplayParts;
-    function signatureToDisplayParts(typechecker, signature, enclosingDeclaration, flags) {
-        return mapToDisplayParts(function (writer) {
-            typechecker.getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags);
-        });
-    }
-    ts.signatureToDisplayParts = signatureToDisplayParts;
-    function getDeclaredName(typeChecker, symbol, location) {
-        // If this is an export or import specifier it could have been renamed using the 'as' syntax.
-        // If so we want to search for whatever is under the cursor.
-        if (isImportOrExportSpecifierName(location)) {
-            return location.getText();
-        }
-        else if (ts.isStringOrNumericLiteral(location.kind) &&
-            location.parent.kind === 140 /* ComputedPropertyName */) {
-            return location.text;
-        }
-        // Try to get the local symbol if we're dealing with an 'export default'
-        // since that symbol has the "true" name.
-        var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
-        var name = typeChecker.symbolToString(localExportDefaultSymbol || symbol);
-        return name;
-    }
-    ts.getDeclaredName = getDeclaredName;
-    function isImportOrExportSpecifierName(location) {
-        return location.parent &&
-            (location.parent.kind === 234 /* ImportSpecifier */ || location.parent.kind === 238 /* ExportSpecifier */) &&
-            location.parent.propertyName === location;
-    }
-    ts.isImportOrExportSpecifierName = isImportOrExportSpecifierName;
-    /**
-     * Strip off existed single quotes or double quotes from a given string
-     *
-     * @return non-quoted string
-     */
-    function stripQuotes(name) {
-        var length = name.length;
-        if (length >= 2 &&
-            name.charCodeAt(0) === name.charCodeAt(length - 1) &&
-            (name.charCodeAt(0) === 34 /* doubleQuote */ || name.charCodeAt(0) === 39 /* singleQuote */)) {
-            return name.substring(1, length - 1);
-        }
-        ;
-        return name;
-    }
-    ts.stripQuotes = stripQuotes;
-    function scriptKindIs(fileName, host) {
-        var scriptKinds = [];
-        for (var _i = 2; _i < arguments.length; _i++) {
-            scriptKinds[_i - 2] = arguments[_i];
-        }
-        var scriptKind = getScriptKind(fileName, host);
-        return ts.forEach(scriptKinds, function (k) { return k === scriptKind; });
-    }
-    ts.scriptKindIs = scriptKindIs;
-    function getScriptKind(fileName, host) {
-        // First check to see if the script kind was specified by the host. Chances are the host
-        // may override the default script kind for the file extension.
-        var scriptKind;
-        if (host && host.getScriptKind) {
-            scriptKind = host.getScriptKind(fileName);
-        }
-        if (!scriptKind || scriptKind === 0 /* Unknown */) {
-            scriptKind = ts.getScriptKindFromFileName(fileName);
-        }
-        return ts.ensureScriptKind(fileName, scriptKind);
-    }
-    ts.getScriptKind = getScriptKind;
-})(ts || (ts = {}));
-// Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0.
-// See LICENSE.txt in the project root for complete license information.
-/// <reference path='services.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var JsTyping;
-    (function (JsTyping) {
-        ;
-        ;
-        // A map of loose file names to library names
-        // that we are confident require typings
-        var safeList;
-        /**
-         * @param host is the object providing I/O related operations.
-         * @param fileNames are the file names that belong to the same project
-         * @param projectRootPath is the path to the project root directory
-         * @param safeListPath is the path used to retrieve the safe list
-         * @param packageNameToTypingLocation is the map of package names to their cached typing locations
-         * @param typingOptions are used to customize the typing inference process
-         * @param compilerOptions are used as a source for typing inference
-         */
-        function discoverTypings(host, fileNames, projectRootPath, safeListPath, packageNameToTypingLocation, typingOptions, compilerOptions) {
-            // A typing name to typing file path mapping
-            var inferredTypings = {};
-            if (!typingOptions || !typingOptions.enableAutoDiscovery) {
-                return { cachedTypingPaths: [], newTypingNames: [], filesToWatch: [] };
-            }
-            // Only infer typings for .js and .jsx files
-            fileNames = ts.filter(ts.map(fileNames, ts.normalizePath), function (f) { return ts.scriptKindIs(f, /*LanguageServiceHost*/ undefined, 1 /* JS */, 2 /* JSX */); });
-            if (!safeList) {
-                var result = ts.readConfigFile(safeListPath, function (path) { return host.readFile(path); });
-                if (result.config) {
-                    safeList = result.config;
-                }
-                else {
-                    safeList = {};
-                }
-                ;
-            }
-            var filesToWatch = [];
-            // Directories to search for package.json, bower.json and other typing information
-            var searchDirs = [];
-            var exclude = [];
-            mergeTypings(typingOptions.include);
-            exclude = typingOptions.exclude || [];
-            var possibleSearchDirs = ts.map(fileNames, ts.getDirectoryPath);
-            if (projectRootPath !== undefined) {
-                possibleSearchDirs.push(projectRootPath);
-            }
-            searchDirs = ts.deduplicate(possibleSearchDirs);
-            for (var _i = 0, searchDirs_1 = searchDirs; _i < searchDirs_1.length; _i++) {
-                var searchDir = searchDirs_1[_i];
-                var packageJsonPath = ts.combinePaths(searchDir, "package.json");
-                getTypingNamesFromJson(packageJsonPath, filesToWatch);
-                var bowerJsonPath = ts.combinePaths(searchDir, "bower.json");
-                getTypingNamesFromJson(bowerJsonPath, filesToWatch);
-                var nodeModulesPath = ts.combinePaths(searchDir, "node_modules");
-                getTypingNamesFromNodeModuleFolder(nodeModulesPath);
-            }
-            getTypingNamesFromSourceFileNames(fileNames);
-            // Add the cached typing locations for inferred typings that are already installed
-            for (var name_37 in packageNameToTypingLocation) {
-                if (ts.hasProperty(inferredTypings, name_37) && !inferredTypings[name_37]) {
-                    inferredTypings[name_37] = packageNameToTypingLocation[name_37];
-                }
-            }
-            // Remove typings that the user has added to the exclude list
-            for (var _a = 0, exclude_1 = exclude; _a < exclude_1.length; _a++) {
-                var excludeTypingName = exclude_1[_a];
-                delete inferredTypings[excludeTypingName];
-            }
-            var newTypingNames = [];
-            var cachedTypingPaths = [];
-            for (var typing in inferredTypings) {
-                if (inferredTypings[typing] !== undefined) {
-                    cachedTypingPaths.push(inferredTypings[typing]);
-                }
-                else {
-                    newTypingNames.push(typing);
-                }
-            }
-            return { cachedTypingPaths: cachedTypingPaths, newTypingNames: newTypingNames, filesToWatch: filesToWatch };
-            /**
-             * Merge a given list of typingNames to the inferredTypings map
-             */
-            function mergeTypings(typingNames) {
-                if (!typingNames) {
-                    return;
-                }
-                for (var _i = 0, typingNames_1 = typingNames; _i < typingNames_1.length; _i++) {
-                    var typing = typingNames_1[_i];
-                    if (!ts.hasProperty(inferredTypings, typing)) {
-                        inferredTypings[typing] = undefined;
-                    }
-                }
-            }
-            /**
-             * Get the typing info from common package manager json files like package.json or bower.json
-             */
-            function getTypingNamesFromJson(jsonPath, filesToWatch) {
-                var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); });
-                if (result.config) {
-                    var jsonConfig = result.config;
-                    filesToWatch.push(jsonPath);
-                    if (jsonConfig.dependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.dependencies));
-                    }
-                    if (jsonConfig.devDependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.devDependencies));
-                    }
-                    if (jsonConfig.optionalDependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.optionalDependencies));
-                    }
-                    if (jsonConfig.peerDependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.peerDependencies));
-                    }
-                }
-            }
-            /**
-             * Infer typing names from given file names. For example, the file name "jquery-min.2.3.4.js"
-             * should be inferred to the 'jquery' typing name; and "angular-route.1.2.3.js" should be inferred
-             * to the 'angular-route' typing name.
-             * @param fileNames are the names for source files in the project
-             */
-            function getTypingNamesFromSourceFileNames(fileNames) {
-                var jsFileNames = ts.filter(fileNames, ts.hasJavaScriptFileExtension);
-                var inferredTypingNames = ts.map(jsFileNames, function (f) { return ts.removeFileExtension(ts.getBaseFileName(f.toLowerCase())); });
-                var cleanedTypingNames = ts.map(inferredTypingNames, function (f) { return f.replace(/((?:\.|-)min(?=\.|$))|((?:-|\.)\d+)/g, ""); });
-                if (safeList === undefined) {
-                    mergeTypings(cleanedTypingNames);
-                }
-                else {
-                    mergeTypings(ts.filter(cleanedTypingNames, function (f) { return ts.hasProperty(safeList, f); }));
-                }
-                var hasJsxFile = ts.forEach(fileNames, function (f) { return ts.scriptKindIs(f, /*LanguageServiceHost*/ undefined, 2 /* JSX */); });
-                if (hasJsxFile) {
-                    mergeTypings(["react"]);
-                }
-            }
-            /**
-             * Infer typing names from node_module folder
-             * @param nodeModulesPath is the path to the "node_modules" folder
-             */
-            function getTypingNamesFromNodeModuleFolder(nodeModulesPath) {
-                // Todo: add support for ModuleResolutionHost too
-                if (!host.directoryExists(nodeModulesPath)) {
-                    return;
-                }
-                var typingNames = [];
-                var fileNames = host.readDirectory(nodeModulesPath, "*.json", /*exclude*/ undefined, /*depth*/ 2);
-                for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
-                    var fileName = fileNames_1[_i];
-                    var normalizedFileName = ts.normalizePath(fileName);
-                    if (ts.getBaseFileName(normalizedFileName) !== "package.json") {
-                        continue;
-                    }
-                    var result = ts.readConfigFile(normalizedFileName, function (path) { return host.readFile(path); });
-                    if (!result.config) {
-                        continue;
-                    }
-                    var packageJson = result.config;
-                    // npm 3's package.json contains a "_requiredBy" field
-                    // we should include all the top level module names for npm 2, and only module names whose
-                    // "_requiredBy" field starts with "#" or equals "/" for npm 3.
-                    if (packageJson._requiredBy &&
-                        ts.filter(packageJson._requiredBy, function (r) { return r[0] === "#" || r === "/"; }).length === 0) {
-                        continue;
-                    }
-                    // If the package has its own d.ts typings, those will take precedence. Otherwise the package name will be used
-                    // to download d.ts files from DefinitelyTyped
-                    if (!packageJson.name) {
-                        continue;
-                    }
-                    if (packageJson.typings) {
-                        var absolutePath = ts.getNormalizedAbsolutePath(packageJson.typings, ts.getDirectoryPath(normalizedFileName));
-                        inferredTypings[packageJson.name] = absolutePath;
-                    }
-                    else {
-                        typingNames.push(packageJson.name);
-                    }
-                }
-                mergeTypings(typingNames);
-            }
-        }
-        JsTyping.discoverTypings = discoverTypings;
-    })(JsTyping = ts.JsTyping || (ts.JsTyping = {}));
-})(ts || (ts = {}));
-/// <reference path="formatting.ts"/>
-/// <reference path="..\..\compiler\scanner.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var standardScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, 0 /* Standard */);
-        var jsxScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, 1 /* JSX */);
-        /**
-         * Scanner that is currently used for formatting
-         */
-        var scanner;
-        var ScanAction;
-        (function (ScanAction) {
-            ScanAction[ScanAction["Scan"] = 0] = "Scan";
-            ScanAction[ScanAction["RescanGreaterThanToken"] = 1] = "RescanGreaterThanToken";
-            ScanAction[ScanAction["RescanSlashToken"] = 2] = "RescanSlashToken";
-            ScanAction[ScanAction["RescanTemplateToken"] = 3] = "RescanTemplateToken";
-            ScanAction[ScanAction["RescanJsxIdentifier"] = 4] = "RescanJsxIdentifier";
-        })(ScanAction || (ScanAction = {}));
-        function getFormattingScanner(sourceFile, startPos, endPos) {
-            ts.Debug.assert(scanner === undefined);
-            scanner = sourceFile.languageVariant === 1 /* JSX */ ? jsxScanner : standardScanner;
-            scanner.setText(sourceFile.text);
-            scanner.setTextPos(startPos);
-            var wasNewLine = true;
-            var leadingTrivia;
-            var trailingTrivia;
-            var savedPos;
-            var lastScanAction;
-            var lastTokenInfo;
-            return {
-                advance: advance,
-                readTokenInfo: readTokenInfo,
-                isOnToken: isOnToken,
-                getCurrentLeadingTrivia: function () { return leadingTrivia; },
-                lastTrailingTriviaWasNewLine: function () { return wasNewLine; },
-                close: function () {
-                    ts.Debug.assert(scanner !== undefined);
-                    lastTokenInfo = undefined;
-                    scanner.setText(undefined);
-                    scanner = undefined;
-                }
-            };
-            function advance() {
-                ts.Debug.assert(scanner !== undefined);
-                lastTokenInfo = undefined;
-                var isStarted = scanner.getStartPos() !== startPos;
-                if (isStarted) {
-                    if (trailingTrivia) {
-                        ts.Debug.assert(trailingTrivia.length !== 0);
-                        wasNewLine = ts.lastOrUndefined(trailingTrivia).kind === 4 /* NewLineTrivia */;
-                    }
-                    else {
-                        wasNewLine = false;
-                    }
-                }
-                leadingTrivia = undefined;
-                trailingTrivia = undefined;
-                if (!isStarted) {
-                    scanner.scan();
-                }
-                var pos = scanner.getStartPos();
-                // Read leading trivia and token
-                while (pos < endPos) {
-                    var t = scanner.getToken();
-                    if (!ts.isTrivia(t)) {
-                        break;
-                    }
-                    // consume leading trivia
-                    scanner.scan();
-                    var item = {
-                        pos: pos,
-                        end: scanner.getStartPos(),
-                        kind: t
-                    };
-                    pos = scanner.getStartPos();
-                    if (!leadingTrivia) {
-                        leadingTrivia = [];
-                    }
-                    leadingTrivia.push(item);
-                }
-                savedPos = scanner.getStartPos();
-            }
-            function shouldRescanGreaterThanToken(node) {
-                if (node) {
-                    switch (node.kind) {
-                        case 29 /* GreaterThanEqualsToken */:
-                        case 64 /* GreaterThanGreaterThanEqualsToken */:
-                        case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                        case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                        case 44 /* GreaterThanGreaterThanToken */:
-                            return true;
-                    }
-                }
-                return false;
-            }
-            function shouldRescanJsxIdentifier(node) {
-                if (node.parent) {
-                    switch (node.parent.kind) {
-                        case 246 /* JsxAttribute */:
-                        case 243 /* JsxOpeningElement */:
-                        case 245 /* JsxClosingElement */:
-                        case 242 /* JsxSelfClosingElement */:
-                            return node.kind === 69 /* Identifier */;
-                    }
-                }
-                return false;
-            }
-            function shouldRescanSlashToken(container) {
-                return container.kind === 10 /* RegularExpressionLiteral */;
-            }
-            function shouldRescanTemplateToken(container) {
-                return container.kind === 13 /* TemplateMiddle */ ||
-                    container.kind === 14 /* TemplateTail */;
-            }
-            function startsWithSlashToken(t) {
-                return t === 39 /* SlashToken */ || t === 61 /* SlashEqualsToken */;
-            }
-            function readTokenInfo(n) {
-                ts.Debug.assert(scanner !== undefined);
-                if (!isOnToken()) {
-                    // scanner is not on the token (either advance was not called yet or scanner is already past the end position)
-                    return {
-                        leadingTrivia: leadingTrivia,
-                        trailingTrivia: undefined,
-                        token: undefined
-                    };
-                }
-                // normally scanner returns the smallest available token
-                // check the kind of context node to determine if scanner should have more greedy behavior and consume more text.
-                var expectedScanAction = shouldRescanGreaterThanToken(n)
-                    ? 1 /* RescanGreaterThanToken */
-                    : shouldRescanSlashToken(n)
-                        ? 2 /* RescanSlashToken */
-                        : shouldRescanTemplateToken(n)
-                            ? 3 /* RescanTemplateToken */
-                            : shouldRescanJsxIdentifier(n)
-                                ? 4 /* RescanJsxIdentifier */
-                                : 0 /* Scan */;
-                if (lastTokenInfo && expectedScanAction === lastScanAction) {
-                    // readTokenInfo was called before with the same expected scan action.
-                    // No need to re-scan text, return existing 'lastTokenInfo'
-                    // it is ok to call fixTokenKind here since it does not affect
-                    // what portion of text is consumed. In contrast rescanning can change it,
-                    // i.e. for '>=' when originally scanner eats just one character
-                    // and rescanning forces it to consume more.
-                    return fixTokenKind(lastTokenInfo, n);
-                }
-                if (scanner.getStartPos() !== savedPos) {
-                    ts.Debug.assert(lastTokenInfo !== undefined);
-                    // readTokenInfo was called before but scan action differs - rescan text
-                    scanner.setTextPos(savedPos);
-                    scanner.scan();
-                }
-                var currentToken = scanner.getToken();
-                if (expectedScanAction === 1 /* RescanGreaterThanToken */ && currentToken === 27 /* GreaterThanToken */) {
-                    currentToken = scanner.reScanGreaterToken();
-                    ts.Debug.assert(n.kind === currentToken);
-                    lastScanAction = 1 /* RescanGreaterThanToken */;
-                }
-                else if (expectedScanAction === 2 /* RescanSlashToken */ && startsWithSlashToken(currentToken)) {
-                    currentToken = scanner.reScanSlashToken();
-                    ts.Debug.assert(n.kind === currentToken);
-                    lastScanAction = 2 /* RescanSlashToken */;
-                }
-                else if (expectedScanAction === 3 /* RescanTemplateToken */ && currentToken === 16 /* CloseBraceToken */) {
-                    currentToken = scanner.reScanTemplateToken();
-                    lastScanAction = 3 /* RescanTemplateToken */;
-                }
-                else if (expectedScanAction === 4 /* RescanJsxIdentifier */ && currentToken === 69 /* Identifier */) {
-                    currentToken = scanner.scanJsxIdentifier();
-                    lastScanAction = 4 /* RescanJsxIdentifier */;
-                }
-                else {
-                    lastScanAction = 0 /* Scan */;
-                }
-                var token = {
-                    pos: scanner.getStartPos(),
-                    end: scanner.getTextPos(),
-                    kind: currentToken
-                };
-                // consume trailing trivia
-                if (trailingTrivia) {
-                    trailingTrivia = undefined;
-                }
-                while (scanner.getStartPos() < endPos) {
-                    currentToken = scanner.scan();
-                    if (!ts.isTrivia(currentToken)) {
-                        break;
-                    }
-                    var trivia = {
-                        pos: scanner.getStartPos(),
-                        end: scanner.getTextPos(),
-                        kind: currentToken
-                    };
-                    if (!trailingTrivia) {
-                        trailingTrivia = [];
-                    }
-                    trailingTrivia.push(trivia);
-                    if (currentToken === 4 /* NewLineTrivia */) {
-                        // move past new line
-                        scanner.scan();
-                        break;
-                    }
-                }
-                lastTokenInfo = {
-                    leadingTrivia: leadingTrivia,
-                    trailingTrivia: trailingTrivia,
-                    token: token
-                };
-                return fixTokenKind(lastTokenInfo, n);
-            }
-            function isOnToken() {
-                ts.Debug.assert(scanner !== undefined);
-                var current = (lastTokenInfo && lastTokenInfo.token.kind) || scanner.getToken();
-                var startPos = (lastTokenInfo && lastTokenInfo.token.pos) || scanner.getStartPos();
-                return startPos < endPos && current !== 1 /* EndOfFileToken */ && !ts.isTrivia(current);
-            }
-            // when containing node in the tree is token 
-            // but its kind differs from the kind that was returned by the scanner,
-            // then kind needs to be fixed. This might happen in cases 
-            // when parser interprets token differently, i.e keyword treated as identifier
-            function fixTokenKind(tokenInfo, container) {
-                if (ts.isToken(container) && tokenInfo.token.kind !== container.kind) {
-                    tokenInfo.token.kind = container.kind;
-                }
-                return tokenInfo;
-            }
-        }
-        formatting.getFormattingScanner = getFormattingScanner;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-/// <reference path="references.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var FormattingContext = (function () {
-            function FormattingContext(sourceFile, formattingRequestKind) {
-                this.sourceFile = sourceFile;
-                this.formattingRequestKind = formattingRequestKind;
-            }
-            FormattingContext.prototype.updateContext = function (currentRange, currentTokenParent, nextRange, nextTokenParent, commonParent) {
-                ts.Debug.assert(currentRange !== undefined, "currentTokenSpan is null");
-                ts.Debug.assert(currentTokenParent !== undefined, "currentTokenParent is null");
-                ts.Debug.assert(nextRange !== undefined, "nextTokenSpan is null");
-                ts.Debug.assert(nextTokenParent !== undefined, "nextTokenParent is null");
-                ts.Debug.assert(commonParent !== undefined, "commonParent is null");
-                this.currentTokenSpan = currentRange;
-                this.currentTokenParent = currentTokenParent;
-                this.nextTokenSpan = nextRange;
-                this.nextTokenParent = nextTokenParent;
-                this.contextNode = commonParent;
-                // drop cached results
-                this.contextNodeAllOnSameLine = undefined;
-                this.nextNodeAllOnSameLine = undefined;
-                this.tokensAreOnSameLine = undefined;
-                this.contextNodeBlockIsOnOneLine = undefined;
-                this.nextNodeBlockIsOnOneLine = undefined;
-            };
-            FormattingContext.prototype.ContextNodeAllOnSameLine = function () {
-                if (this.contextNodeAllOnSameLine === undefined) {
-                    this.contextNodeAllOnSameLine = this.NodeIsOnOneLine(this.contextNode);
-                }
-                return this.contextNodeAllOnSameLine;
-            };
-            FormattingContext.prototype.NextNodeAllOnSameLine = function () {
-                if (this.nextNodeAllOnSameLine === undefined) {
-                    this.nextNodeAllOnSameLine = this.NodeIsOnOneLine(this.nextTokenParent);
-                }
-                return this.nextNodeAllOnSameLine;
-            };
-            FormattingContext.prototype.TokensAreOnSameLine = function () {
-                if (this.tokensAreOnSameLine === undefined) {
-                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(this.currentTokenSpan.pos).line;
-                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(this.nextTokenSpan.pos).line;
-                    this.tokensAreOnSameLine = (startLine === endLine);
-                }
-                return this.tokensAreOnSameLine;
-            };
-            FormattingContext.prototype.ContextNodeBlockIsOnOneLine = function () {
-                if (this.contextNodeBlockIsOnOneLine === undefined) {
-                    this.contextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.contextNode);
-                }
-                return this.contextNodeBlockIsOnOneLine;
-            };
-            FormattingContext.prototype.NextNodeBlockIsOnOneLine = function () {
-                if (this.nextNodeBlockIsOnOneLine === undefined) {
-                    this.nextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.nextTokenParent);
-                }
-                return this.nextNodeBlockIsOnOneLine;
-            };
-            FormattingContext.prototype.NodeIsOnOneLine = function (node) {
-                var startLine = this.sourceFile.getLineAndCharacterOfPosition(node.getStart(this.sourceFile)).line;
-                var endLine = this.sourceFile.getLineAndCharacterOfPosition(node.getEnd()).line;
-                return startLine === endLine;
-            };
-            FormattingContext.prototype.BlockIsOnOneLine = function (node) {
-                var openBrace = ts.findChildOfKind(node, 15 /* OpenBraceToken */, this.sourceFile);
-                var closeBrace = ts.findChildOfKind(node, 16 /* CloseBraceToken */, this.sourceFile);
-                if (openBrace && closeBrace) {
-                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(openBrace.getEnd()).line;
-                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(closeBrace.getStart(this.sourceFile)).line;
-                    return startLine === endLine;
-                }
-                return false;
-            };
-            return FormattingContext;
-        }());
-        formatting.FormattingContext = FormattingContext;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-/// <reference path="references.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        (function (FormattingRequestKind) {
-            FormattingRequestKind[FormattingRequestKind["FormatDocument"] = 0] = "FormatDocument";
-            FormattingRequestKind[FormattingRequestKind["FormatSelection"] = 1] = "FormatSelection";
-            FormattingRequestKind[FormattingRequestKind["FormatOnEnter"] = 2] = "FormatOnEnter";
-            FormattingRequestKind[FormattingRequestKind["FormatOnSemicolon"] = 3] = "FormatOnSemicolon";
-            FormattingRequestKind[FormattingRequestKind["FormatOnClosingCurlyBrace"] = 4] = "FormatOnClosingCurlyBrace";
-        })(formatting.FormattingRequestKind || (formatting.FormattingRequestKind = {}));
-        var FormattingRequestKind = formatting.FormattingRequestKind;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Rule = (function () {
-            function Rule(Descriptor, Operation, Flag) {
-                if (Flag === void 0) { Flag = 0 /* None */; }
-                this.Descriptor = Descriptor;
-                this.Operation = Operation;
-                this.Flag = Flag;
-            }
-            Rule.prototype.toString = function () {
-                return "[desc=" + this.Descriptor + "," +
-                    "operation=" + this.Operation + "," +
-                    "flag=" + this.Flag + "]";
-            };
-            return Rule;
-        }());
-        formatting.Rule = Rule;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        (function (RuleAction) {
-            RuleAction[RuleAction["Ignore"] = 1] = "Ignore";
-            RuleAction[RuleAction["Space"] = 2] = "Space";
-            RuleAction[RuleAction["NewLine"] = 4] = "NewLine";
-            RuleAction[RuleAction["Delete"] = 8] = "Delete";
-        })(formatting.RuleAction || (formatting.RuleAction = {}));
-        var RuleAction = formatting.RuleAction;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RuleDescriptor = (function () {
-            function RuleDescriptor(LeftTokenRange, RightTokenRange) {
-                this.LeftTokenRange = LeftTokenRange;
-                this.RightTokenRange = RightTokenRange;
-            }
-            RuleDescriptor.prototype.toString = function () {
-                return "[leftRange=" + this.LeftTokenRange + "," +
-                    "rightRange=" + this.RightTokenRange + "]";
-            };
-            RuleDescriptor.create1 = function (left, right) {
-                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), formatting.Shared.TokenRange.FromToken(right));
-            };
-            RuleDescriptor.create2 = function (left, right) {
-                return RuleDescriptor.create4(left, formatting.Shared.TokenRange.FromToken(right));
-            };
-            RuleDescriptor.create3 = function (left, right) {
-                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), right);
-            };
-            RuleDescriptor.create4 = function (left, right) {
-                return new RuleDescriptor(left, right);
-            };
-            return RuleDescriptor;
-        }());
-        formatting.RuleDescriptor = RuleDescriptor;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        (function (RuleFlags) {
-            RuleFlags[RuleFlags["None"] = 0] = "None";
-            RuleFlags[RuleFlags["CanDeleteNewLines"] = 1] = "CanDeleteNewLines";
-        })(formatting.RuleFlags || (formatting.RuleFlags = {}));
-        var RuleFlags = formatting.RuleFlags;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* tslint:disable:no-null-keyword */
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RuleOperation = (function () {
-            function RuleOperation() {
-                this.Context = null;
-                this.Action = null;
-            }
-            RuleOperation.prototype.toString = function () {
-                return "[context=" + this.Context + "," +
-                    "action=" + this.Action + "]";
-            };
-            RuleOperation.create1 = function (action) {
-                return RuleOperation.create2(formatting.RuleOperationContext.Any, action);
-            };
-            RuleOperation.create2 = function (context, action) {
-                var result = new RuleOperation();
-                result.Context = context;
-                result.Action = action;
-                return result;
-            };
-            return RuleOperation;
-        }());
-        formatting.RuleOperation = RuleOperation;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RuleOperationContext = (function () {
-            function RuleOperationContext() {
-                var funcs = [];
-                for (var _i = 0; _i < arguments.length; _i++) {
-                    funcs[_i - 0] = arguments[_i];
-                }
-                this.customContextChecks = funcs;
-            }
-            RuleOperationContext.prototype.IsAny = function () {
-                return this === RuleOperationContext.Any;
-            };
-            RuleOperationContext.prototype.InContext = function (context) {
-                if (this.IsAny()) {
-                    return true;
-                }
-                for (var _i = 0, _a = this.customContextChecks; _i < _a.length; _i++) {
-                    var check = _a[_i];
-                    if (!check(context)) {
-                        return false;
-                    }
-                }
-                return true;
-            };
-            RuleOperationContext.Any = new RuleOperationContext();
-            return RuleOperationContext;
-        }());
-        formatting.RuleOperationContext = RuleOperationContext;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Rules = (function () {
-            function Rules() {
-                ///
-                /// Common Rules
-                ///
-                // Leave comments alone
-                this.IgnoreBeforeComment = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.Comments), formatting.RuleOperation.create1(1 /* Ignore */));
-                this.IgnoreAfterLineComment = new formatting.Rule(formatting.RuleDescriptor.create3(2 /* SingleLineCommentTrivia */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create1(1 /* Ignore */));
-                // Space after keyword but not before ; or : or ?
-                this.NoSpaceBeforeSemicolon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 23 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeColon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 54 /* ColonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                this.NoSpaceBeforeQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 53 /* QuestionToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                this.SpaceAfterColon = new formatting.Rule(formatting.RuleDescriptor.create3(54 /* ColonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterQuestionMarkInConditionalOperator = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConditionalOperatorContext), 2 /* Space */));
-                this.NoSpaceAfterQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterSemicolon = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Space after }.
-                this.SpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16 /* CloseBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), 2 /* Space */));
-                // Special case for (}, else) and (}, while) since else & while tokens are not part of the tree which makes SpaceAfterCloseBrace rule not applied
-                this.SpaceBetweenCloseBraceAndElse = new formatting.Rule(formatting.RuleDescriptor.create1(16 /* CloseBraceToken */, 80 /* ElseKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBetweenCloseBraceAndWhile = new formatting.Rule(formatting.RuleDescriptor.create1(16 /* CloseBraceToken */, 104 /* WhileKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16 /* CloseBraceToken */, formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 20 /* CloseBracketToken */, 24 /* CommaToken */, 23 /* SemicolonToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // No space for dot
-                this.NoSpaceBeforeDot = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 21 /* DotToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterDot = new formatting.Rule(formatting.RuleDescriptor.create3(21 /* DotToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // No space before and after indexer
-                this.NoSpaceBeforeOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19 /* OpenBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create3(20 /* CloseBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), 8 /* Delete */));
-                // Place a space before open brace in a function declaration
-                this.FunctionOpenBraceLeftTokenRange = formatting.Shared.TokenRange.AnyIncludingMultilineComments;
-                this.SpaceBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
-                // Place a space before open brace in a TypeScript declaration that has braces as children (class, module, enum, etc)
-                this.TypeScriptOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([69 /* Identifier */, 3 /* MultiLineCommentTrivia */, 73 /* ClassKeyword */]);
-                this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
-                // Place a space before open brace in a control flow construct
-                this.ControlOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 3 /* MultiLineCommentTrivia */, 79 /* DoKeyword */, 100 /* TryKeyword */, 85 /* FinallyKeyword */, 80 /* ElseKeyword */]);
-                this.SpaceBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
-                // Insert a space after { and before } in single-line contexts, but remove space from empty object literals {}.
-                this.SpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2 /* Space */));
-                this.SpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2 /* Space */));
-                this.NoSpaceBetweenEmptyBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15 /* OpenBraceToken */, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), 8 /* Delete */));
-                // Insert new line after { and before } in multi-line contexts.
-                this.NewLineAfterOpenBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
-                // For functions and control block place } on a new line    [multi-line rule]
-                this.NewLineBeforeCloseBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyIncludingMultilineComments, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
-                // Special handling of unary operators.
-                // Prefix operators generally shouldn't have a space between
-                // them and their target unary expression.
-                this.NoSpaceAfterUnaryPrefixOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.UnaryPrefixOperators, formatting.Shared.TokenRange.UnaryPrefixExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                this.NoSpaceAfterUnaryPreincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(41 /* PlusPlusToken */, formatting.Shared.TokenRange.UnaryPreincrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterUnaryPredecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(42 /* MinusMinusToken */, formatting.Shared.TokenRange.UnaryPredecrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeUnaryPostincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostincrementExpressions, 41 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeUnaryPostdecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostdecrementExpressions, 42 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // More unary operator special-casing.
-                // DevDiv 181814:  Be careful when removing leading whitespace
-                // around unary operators.  Examples:
-                //      1 - -2  --X-->  1--2
-                //      a + ++b --X-->  a+++b
-                this.SpaceAfterPostincrementWhenFollowedByAdd = new formatting.Rule(formatting.RuleDescriptor.create1(41 /* PlusPlusToken */, 35 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterAddWhenFollowedByUnaryPlus = new formatting.Rule(formatting.RuleDescriptor.create1(35 /* PlusToken */, 35 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterAddWhenFollowedByPreincrement = new formatting.Rule(formatting.RuleDescriptor.create1(35 /* PlusToken */, 41 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterPostdecrementWhenFollowedBySubtract = new formatting.Rule(formatting.RuleDescriptor.create1(42 /* MinusMinusToken */, 36 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterSubtractWhenFollowedByUnaryMinus = new formatting.Rule(formatting.RuleDescriptor.create1(36 /* MinusToken */, 36 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterSubtractWhenFollowedByPredecrement = new formatting.Rule(formatting.RuleDescriptor.create1(36 /* MinusToken */, 42 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.NoSpaceBeforeComma = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 24 /* CommaToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterCertainKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([102 /* VarKeyword */, 98 /* ThrowKeyword */, 92 /* NewKeyword */, 78 /* DeleteKeyword */, 94 /* ReturnKeyword */, 101 /* TypeOfKeyword */, 119 /* AwaitKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceAfterLetConstInVariableDeclaration = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([108 /* LetKeyword */, 74 /* ConstKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), 2 /* Space */));
-                this.NoSpaceBeforeOpenParenInFuncCall = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), 8 /* Delete */));
-                this.SpaceAfterFunctionInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create3(87 /* FunctionKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
-                this.NoSpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 8 /* Delete */));
-                this.SpaceAfterVoidOperator = new formatting.Rule(formatting.RuleDescriptor.create3(103 /* VoidKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), 2 /* Space */));
-                this.NoSpaceBetweenReturnAndSemicolon = new formatting.Rule(formatting.RuleDescriptor.create1(94 /* ReturnKeyword */, 23 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Add a space between statements. All keywords except (do,else,case) has open/close parens after them.
-                // So, we have a rule to add a space for [),Any], [do,Any], [else,Any], and [case,Any]
-                this.SpaceBetweenStatements = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 79 /* DoKeyword */, 80 /* ElseKeyword */, 71 /* CaseKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotForContext), 2 /* Space */));
-                // This low-pri rule takes care of "try {" and "finally {" in case the rule SpaceBeforeOpenBraceInControl didn't execute on FormatOnEnter.
-                this.SpaceAfterTryFinally = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([100 /* TryKeyword */, 85 /* FinallyKeyword */]), 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                //      get x() {}
-                //      set x(val) {}
-                this.SpaceAfterGetSetInMember = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([123 /* GetKeyword */, 131 /* SetKeyword */]), 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
-                // Special case for binary operators (that are keywords). For these we have to add a space and shouldn't follow any user options.
-                this.SpaceBeforeBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryKeywordOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryKeywordOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                // TypeScript-specific higher priority rules
-                // Treat constructor as an identifier in a function declaration, and remove spaces between constructor and following left parentheses
-                this.NoSpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(121 /* ConstructorKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Use of module as a function call. e.g.: import m2 = module("m2");
-                this.NoSpaceAfterModuleImport = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([125 /* ModuleKeyword */, 129 /* RequireKeyword */]), 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Add a space around certain TypeScript keywords
-                this.SpaceAfterCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([115 /* AbstractKeyword */, 73 /* ClassKeyword */, 122 /* DeclareKeyword */, 77 /* DefaultKeyword */, 81 /* EnumKeyword */, 82 /* ExportKeyword */, 83 /* ExtendsKeyword */, 123 /* GetKeyword */, 106 /* ImplementsKeyword */, 89 /* ImportKeyword */, 107 /* InterfaceKeyword */, 125 /* ModuleKeyword */, 126 /* NamespaceKeyword */, 110 /* PrivateKeyword */, 112 /* PublicKeyword */, 111 /* ProtectedKeyword */, 131 /* SetKeyword */, 113 /* StaticKeyword */, 134 /* TypeKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([83 /* ExtendsKeyword */, 106 /* ImplementsKeyword */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Treat string literals in module names as identifiers, and add a space between the literal and the opening Brace braces, e.g.: module "m2" {
-                this.SpaceAfterModuleName = new formatting.Rule(formatting.RuleDescriptor.create1(9 /* StringLiteral */, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsModuleDeclContext), 2 /* Space */));
-                // Lambda expressions
-                this.SpaceBeforeArrow = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 34 /* EqualsGreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceAfterArrow = new formatting.Rule(formatting.RuleDescriptor.create3(34 /* EqualsGreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Optional parameters and let args
-                this.NoSpaceAfterEllipsis = new formatting.Rule(formatting.RuleDescriptor.create1(22 /* DotDotDotToken */, 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterOptionalParameters = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 24 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                // generics and type assertions
-                this.NoSpaceBeforeOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.TypeNames, 25 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceBetweenCloseParenAndAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create1(18 /* CloseParenToken */, 25 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceAfterOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(25 /* LessThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 27 /* GreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceAfterCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.FromTokens([17 /* OpenParenToken */, 19 /* OpenBracketToken */, 27 /* GreaterThanToken */, 24 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 8 /* Delete */));
-                // Remove spaces in empty interface literals. e.g.: x: {}
-                this.NoSpaceBetweenEmptyInterfaceBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15 /* OpenBraceToken */, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectTypeContext), 8 /* Delete */));
-                // decorators
-                this.SpaceBeforeAt = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 55 /* AtToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceAfterAt = new formatting.Rule(formatting.RuleDescriptor.create3(55 /* AtToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterDecorator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([115 /* AbstractKeyword */, 69 /* Identifier */, 82 /* ExportKeyword */, 77 /* DefaultKeyword */, 73 /* ClassKeyword */, 113 /* StaticKeyword */, 112 /* PublicKeyword */, 110 /* PrivateKeyword */, 111 /* ProtectedKeyword */, 123 /* GetKeyword */, 131 /* SetKeyword */, 19 /* OpenBracketToken */, 37 /* AsteriskToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsEndOfDecoratorContextOnSameLine), 2 /* Space */));
-                this.NoSpaceBetweenFunctionKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 37 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 8 /* Delete */));
-                this.SpaceAfterStarInGeneratorDeclaration = new formatting.Rule(formatting.RuleDescriptor.create3(37 /* AsteriskToken */, formatting.Shared.TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 2 /* Space */));
-                this.NoSpaceBetweenYieldKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(114 /* YieldKeyword */, 37 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 8 /* Delete */));
-                this.SpaceBetweenYieldOrYieldStarAndOperand = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([114 /* YieldKeyword */, 37 /* AsteriskToken */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 2 /* Space */));
-                // Async-await
-                this.SpaceBetweenAsyncAndOpenParen = new formatting.Rule(formatting.RuleDescriptor.create1(118 /* AsyncKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsArrowFunctionContext, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBetweenAsyncAndFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(118 /* AsyncKeyword */, 87 /* FunctionKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // template string
-                this.NoSpaceBetweenTagAndTemplateString = new formatting.Rule(formatting.RuleDescriptor.create3(69 /* Identifier */, formatting.Shared.TokenRange.FromTokens([11 /* NoSubstitutionTemplateLiteral */, 12 /* TemplateHead */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // These rules are higher in priority than user-configurable rules.
-                this.HighPriorityCommonRules = [
-                    this.IgnoreBeforeComment, this.IgnoreAfterLineComment,
-                    this.NoSpaceBeforeColon, this.SpaceAfterColon, this.NoSpaceBeforeQuestionMark, this.SpaceAfterQuestionMarkInConditionalOperator,
-                    this.NoSpaceAfterQuestionMark,
-                    this.NoSpaceBeforeDot, this.NoSpaceAfterDot,
-                    this.NoSpaceAfterUnaryPrefixOperator,
-                    this.NoSpaceAfterUnaryPreincrementOperator, this.NoSpaceAfterUnaryPredecrementOperator,
-                    this.NoSpaceBeforeUnaryPostincrementOperator, this.NoSpaceBeforeUnaryPostdecrementOperator,
-                    this.SpaceAfterPostincrementWhenFollowedByAdd,
-                    this.SpaceAfterAddWhenFollowedByUnaryPlus, this.SpaceAfterAddWhenFollowedByPreincrement,
-                    this.SpaceAfterPostdecrementWhenFollowedBySubtract,
-                    this.SpaceAfterSubtractWhenFollowedByUnaryMinus, this.SpaceAfterSubtractWhenFollowedByPredecrement,
-                    this.NoSpaceAfterCloseBrace,
-                    this.SpaceAfterOpenBrace, this.SpaceBeforeCloseBrace, this.NewLineBeforeCloseBraceInBlockContext,
-                    this.SpaceAfterCloseBrace, this.SpaceBetweenCloseBraceAndElse, this.SpaceBetweenCloseBraceAndWhile, this.NoSpaceBetweenEmptyBraceBrackets,
-                    this.NoSpaceBetweenFunctionKeywordAndStar, this.SpaceAfterStarInGeneratorDeclaration,
-                    this.SpaceAfterFunctionInFuncDecl, this.NewLineAfterOpenBraceInBlockContext, this.SpaceAfterGetSetInMember,
-                    this.NoSpaceBetweenYieldKeywordAndStar, this.SpaceBetweenYieldOrYieldStarAndOperand,
-                    this.NoSpaceBetweenReturnAndSemicolon,
-                    this.SpaceAfterCertainKeywords,
-                    this.SpaceAfterLetConstInVariableDeclaration,
-                    this.NoSpaceBeforeOpenParenInFuncCall,
-                    this.SpaceBeforeBinaryKeywordOperator, this.SpaceAfterBinaryKeywordOperator,
-                    this.SpaceAfterVoidOperator,
-                    this.SpaceBetweenAsyncAndOpenParen, this.SpaceBetweenAsyncAndFunctionKeyword,
-                    this.NoSpaceBetweenTagAndTemplateString,
-                    // TypeScript-specific rules
-                    this.NoSpaceAfterConstructor, this.NoSpaceAfterModuleImport,
-                    this.SpaceAfterCertainTypeScriptKeywords, this.SpaceBeforeCertainTypeScriptKeywords,
-                    this.SpaceAfterModuleName,
-                    this.SpaceBeforeArrow, this.SpaceAfterArrow,
-                    this.NoSpaceAfterEllipsis,
-                    this.NoSpaceAfterOptionalParameters,
-                    this.NoSpaceBetweenEmptyInterfaceBraceBrackets,
-                    this.NoSpaceBeforeOpenAngularBracket,
-                    this.NoSpaceBetweenCloseParenAndAngularBracket,
-                    this.NoSpaceAfterOpenAngularBracket,
-                    this.NoSpaceBeforeCloseAngularBracket,
-                    this.NoSpaceAfterCloseAngularBracket,
-                    this.NoSpaceAfterTypeAssertion,
-                    this.SpaceBeforeAt,
-                    this.NoSpaceAfterAt,
-                    this.SpaceAfterDecorator,
-                ];
-                // These rules are lower in priority than user-configurable rules.
-                this.LowPriorityCommonRules = [
-                    this.NoSpaceBeforeSemicolon,
-                    this.SpaceBeforeOpenBraceInControl, this.SpaceBeforeOpenBraceInFunction, this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock,
-                    this.NoSpaceBeforeComma,
-                    this.NoSpaceBeforeOpenBracket,
-                    this.NoSpaceAfterCloseBracket,
-                    this.SpaceAfterSemicolon,
-                    this.NoSpaceBeforeOpenParenInFuncDecl,
-                    this.SpaceBetweenStatements, this.SpaceAfterTryFinally
-                ];
-                ///
-                /// Rules controlled by user options
-                ///
-                // Insert space after comma delimiter
-                this.SpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNextTokenNotCloseBracket), 2 /* Space */));
-                this.NoSpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Insert space before and after binary operators
-                this.SpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.NoSpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
-                this.NoSpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
-                // Insert space after keywords in control flow statements
-                this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 2 /* Space */));
-                this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 8 /* Delete */));
-                // Open Brace braces after function
-                // TypeScript: Function can have return types, which can be made of tons of different token kinds
-                this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
-                // Open Brace braces after TypeScript module/class/interface
-                this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
-                // Open Brace braces after control block
-                this.NewLineBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
-                // Insert space after semicolon in for statement
-                this.SpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 2 /* Space */));
-                this.NoSpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 8 /* Delete */));
-                // Insert space after opening and before closing nonempty parenthesis
-                this.SpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBetweenParens = new formatting.Rule(formatting.RuleDescriptor.create1(17 /* OpenParenToken */, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Insert space after opening and before closing nonempty brackets
-                this.SpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBetweenBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(19 /* OpenBracketToken */, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Insert space after opening and before closing template string braces
-                this.NoSpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12 /* TemplateHead */, 13 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12 /* TemplateHead */, 13 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13 /* TemplateMiddle */, 14 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13 /* TemplateMiddle */, 14 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Insert space after function keyword for anonymous functions
-                this.SpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
-                this.NoSpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 8 /* Delete */));
-            }
-            Rules.prototype.getRuleName = function (rule) {
-                var o = this;
-                for (var name_38 in o) {
-                    if (o[name_38] === rule) {
-                        return name_38;
-                    }
-                }
-                throw new Error("Unknown rule");
-            };
-            ///
-            /// Contexts
-            ///
-            Rules.IsForContext = function (context) {
-                return context.contextNode.kind === 206 /* ForStatement */;
-            };
-            Rules.IsNotForContext = function (context) {
-                return !Rules.IsForContext(context);
-            };
-            Rules.IsBinaryOpContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 187 /* BinaryExpression */:
-                    case 188 /* ConditionalExpression */:
-                    case 195 /* AsExpression */:
-                    case 154 /* TypePredicate */:
-                    case 162 /* UnionType */:
-                    case 163 /* IntersectionType */:
-                        return true;
-                    // equals in binding elements: function foo([[x, y] = [1, 2]])
-                    case 169 /* BindingElement */:
-                    // equals in type X = ...
-                    case 223 /* TypeAliasDeclaration */:
-                    // equal in import a = module('a');
-                    case 229 /* ImportEqualsDeclaration */:
-                    // equal in let a = 0;
-                    case 218 /* VariableDeclaration */:
-                    // equal in p = 0;
-                    case 142 /* Parameter */:
-                    case 255 /* EnumMember */:
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                        return context.currentTokenSpan.kind === 56 /* EqualsToken */ || context.nextTokenSpan.kind === 56 /* EqualsToken */;
-                    // "in" keyword in for (let x in []) { }
-                    case 207 /* ForInStatement */:
-                        return context.currentTokenSpan.kind === 90 /* InKeyword */ || context.nextTokenSpan.kind === 90 /* InKeyword */;
-                    // Technically, "of" is not a binary operator, but format it the same way as "in"
-                    case 208 /* ForOfStatement */:
-                        return context.currentTokenSpan.kind === 138 /* OfKeyword */ || context.nextTokenSpan.kind === 138 /* OfKeyword */;
-                }
-                return false;
-            };
-            Rules.IsNotBinaryOpContext = function (context) {
-                return !Rules.IsBinaryOpContext(context);
-            };
-            Rules.IsConditionalOperatorContext = function (context) {
-                return context.contextNode.kind === 188 /* ConditionalExpression */;
-            };
-            Rules.IsSameLineTokenOrBeforeMultilineBlockContext = function (context) {
-                //// This check is mainly used inside SpaceBeforeOpenBraceInControl and SpaceBeforeOpenBraceInFunction.
-                ////
-                //// Ex: 
-                //// if (1)     { ....
-                ////      * ) and { are on the same line so apply the rule. Here we don't care whether it's same or multi block context
-                ////
-                //// Ex: 
-                //// if (1)
-                //// { ... }
-                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we don't format.
-                ////
-                //// Ex:
-                //// if (1) 
-                //// { ...
-                //// }
-                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we format.
-                return context.TokensAreOnSameLine() || Rules.IsBeforeMultilineBlockContext(context);
-            };
-            // This check is done before an open brace in a control construct, a function, or a typescript block declaration
-            Rules.IsBeforeMultilineBlockContext = function (context) {
-                return Rules.IsBeforeBlockContext(context) && !(context.NextNodeAllOnSameLine() || context.NextNodeBlockIsOnOneLine());
-            };
-            Rules.IsMultilineBlockContext = function (context) {
-                return Rules.IsBlockContext(context) && !(context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
-            };
-            Rules.IsSingleLineBlockContext = function (context) {
-                return Rules.IsBlockContext(context) && (context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
-            };
-            Rules.IsBlockContext = function (context) {
-                return Rules.NodeIsBlockContext(context.contextNode);
-            };
-            Rules.IsBeforeBlockContext = function (context) {
-                return Rules.NodeIsBlockContext(context.nextTokenParent);
-            };
-            // IMPORTANT!!! This method must return true ONLY for nodes with open and close braces as immediate children
-            Rules.NodeIsBlockContext = function (node) {
-                if (Rules.NodeIsTypeScriptDeclWithBlockContext(node)) {
-                    // This means we are in a context that looks like a block to the user, but in the grammar is actually not a node (it's a class, module, enum, object type literal, etc).
-                    return true;
-                }
-                switch (node.kind) {
-                    case 199 /* Block */:
-                    case 227 /* CaseBlock */:
-                    case 171 /* ObjectLiteralExpression */:
-                    case 226 /* ModuleBlock */:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsFunctionDeclContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    // case SyntaxKind.MemberFunctionDeclaration:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    // case SyntaxKind.MethodSignature:
-                    case 151 /* CallSignature */:
-                    case 179 /* FunctionExpression */:
-                    case 148 /* Constructor */:
-                    case 180 /* ArrowFunction */:
-                    // case SyntaxKind.ConstructorDeclaration:
-                    // case SyntaxKind.SimpleArrowFunctionExpression:
-                    // case SyntaxKind.ParenthesizedArrowFunctionExpression:
-                    case 222 /* InterfaceDeclaration */:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsFunctionDeclarationOrFunctionExpressionContext = function (context) {
-                return context.contextNode.kind === 220 /* FunctionDeclaration */ || context.contextNode.kind === 179 /* FunctionExpression */;
-            };
-            Rules.IsTypeScriptDeclWithBlockContext = function (context) {
-                return Rules.NodeIsTypeScriptDeclWithBlockContext(context.contextNode);
-            };
-            Rules.NodeIsTypeScriptDeclWithBlockContext = function (node) {
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 159 /* TypeLiteral */:
-                    case 225 /* ModuleDeclaration */:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsAfterCodeBlockContext = function (context) {
-                switch (context.currentTokenParent.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 225 /* ModuleDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 199 /* Block */:
-                    case 252 /* CatchClause */:
-                    case 226 /* ModuleBlock */:
-                    case 213 /* SwitchStatement */:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsControlDeclContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 203 /* IfStatement */:
-                    case 213 /* SwitchStatement */:
-                    case 206 /* ForStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 205 /* WhileStatement */:
-                    case 216 /* TryStatement */:
-                    case 204 /* DoStatement */:
-                    case 212 /* WithStatement */:
-                    // TODO
-                    // case SyntaxKind.ElseClause:
-                    case 252 /* CatchClause */:
-                        return true;
-                    default:
-                        return false;
-                }
-            };
-            Rules.IsObjectContext = function (context) {
-                return context.contextNode.kind === 171 /* ObjectLiteralExpression */;
-            };
-            Rules.IsFunctionCallContext = function (context) {
-                return context.contextNode.kind === 174 /* CallExpression */;
-            };
-            Rules.IsNewContext = function (context) {
-                return context.contextNode.kind === 175 /* NewExpression */;
-            };
-            Rules.IsFunctionCallOrNewContext = function (context) {
-                return Rules.IsFunctionCallContext(context) || Rules.IsNewContext(context);
-            };
-            Rules.IsPreviousTokenNotComma = function (context) {
-                return context.currentTokenSpan.kind !== 24 /* CommaToken */;
-            };
-            Rules.IsNextTokenNotCloseBracket = function (context) {
-                return context.nextTokenSpan.kind !== 20 /* CloseBracketToken */;
-            };
-            Rules.IsArrowFunctionContext = function (context) {
-                return context.contextNode.kind === 180 /* ArrowFunction */;
-            };
-            Rules.IsNonJsxSameLineTokenContext = function (context) {
-                return context.TokensAreOnSameLine() && context.contextNode.kind !== 244 /* JsxText */;
-            };
-            Rules.IsNotBeforeBlockInFunctionDeclarationContext = function (context) {
-                return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context);
-            };
-            Rules.IsEndOfDecoratorContextOnSameLine = function (context) {
-                return context.TokensAreOnSameLine() &&
-                    context.contextNode.decorators &&
-                    Rules.NodeIsInDecoratorContext(context.currentTokenParent) &&
-                    !Rules.NodeIsInDecoratorContext(context.nextTokenParent);
-            };
-            Rules.NodeIsInDecoratorContext = function (node) {
-                while (ts.isExpression(node)) {
-                    node = node.parent;
-                }
-                return node.kind === 143 /* Decorator */;
-            };
-            Rules.IsStartOfVariableDeclarationList = function (context) {
-                return context.currentTokenParent.kind === 219 /* VariableDeclarationList */ &&
-                    context.currentTokenParent.getStart(context.sourceFile) === context.currentTokenSpan.pos;
-            };
-            Rules.IsNotFormatOnEnter = function (context) {
-                return context.formattingRequestKind !== 2 /* FormatOnEnter */;
-            };
-            Rules.IsModuleDeclContext = function (context) {
-                return context.contextNode.kind === 225 /* ModuleDeclaration */;
-            };
-            Rules.IsObjectTypeContext = function (context) {
-                return context.contextNode.kind === 159 /* TypeLiteral */; // && context.contextNode.parent.kind !== SyntaxKind.InterfaceDeclaration;
-            };
-            Rules.IsTypeArgumentOrParameterOrAssertion = function (token, parent) {
-                if (token.kind !== 25 /* LessThanToken */ && token.kind !== 27 /* GreaterThanToken */) {
-                    return false;
-                }
-                switch (parent.kind) {
-                    case 155 /* TypeReference */:
-                    case 177 /* TypeAssertionExpression */:
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 174 /* CallExpression */:
-                    case 175 /* NewExpression */:
-                    case 194 /* ExpressionWithTypeArguments */:
-                        return true;
-                    default:
-                        return false;
-                }
-            };
-            Rules.IsTypeArgumentOrParameterOrAssertionContext = function (context) {
-                return Rules.IsTypeArgumentOrParameterOrAssertion(context.currentTokenSpan, context.currentTokenParent) ||
-                    Rules.IsTypeArgumentOrParameterOrAssertion(context.nextTokenSpan, context.nextTokenParent);
-            };
-            Rules.IsTypeAssertionContext = function (context) {
-                return context.contextNode.kind === 177 /* TypeAssertionExpression */;
-            };
-            Rules.IsVoidOpContext = function (context) {
-                return context.currentTokenSpan.kind === 103 /* VoidKeyword */ && context.currentTokenParent.kind === 183 /* VoidExpression */;
-            };
-            Rules.IsYieldOrYieldStarWithOperand = function (context) {
-                return context.contextNode.kind === 190 /* YieldExpression */ && context.contextNode.expression !== undefined;
-            };
-            return Rules;
-        }());
-        formatting.Rules = Rules;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* tslint:disable:no-null-keyword */
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RulesMap = (function () {
-            function RulesMap() {
-                this.map = [];
-                this.mapRowLength = 0;
-            }
-            RulesMap.create = function (rules) {
-                var result = new RulesMap();
-                result.Initialize(rules);
-                return result;
-            };
-            RulesMap.prototype.Initialize = function (rules) {
-                this.mapRowLength = 138 /* LastToken */ + 1;
-                this.map = new Array(this.mapRowLength * this.mapRowLength); // new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
-                // This array is used only during construction of the rulesbucket in the map
-                var rulesBucketConstructionStateList = new Array(this.map.length); // new Array<RulesBucketConstructionState>(this.map.length);
-                this.FillRules(rules, rulesBucketConstructionStateList);
-                return this.map;
-            };
-            RulesMap.prototype.FillRules = function (rules, rulesBucketConstructionStateList) {
-                var _this = this;
-                rules.forEach(function (rule) {
-                    _this.FillRule(rule, rulesBucketConstructionStateList);
-                });
-            };
-            RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
-                var rulesBucketIndex = (row * this.mapRowLength) + column;
-                // Debug.Assert(rulesBucketIndex < this.map.Length, "Trying to access an index outside the array.");
-                return rulesBucketIndex;
-            };
-            RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
-                var _this = this;
-                var specificRule = rule.Descriptor.LeftTokenRange !== formatting.Shared.TokenRange.Any &&
-                    rule.Descriptor.RightTokenRange !== formatting.Shared.TokenRange.Any;
-                rule.Descriptor.LeftTokenRange.GetTokens().forEach(function (left) {
-                    rule.Descriptor.RightTokenRange.GetTokens().forEach(function (right) {
-                        var rulesBucketIndex = _this.GetRuleBucketIndex(left, right);
-                        var rulesBucket = _this.map[rulesBucketIndex];
-                        if (rulesBucket === undefined) {
-                            rulesBucket = _this.map[rulesBucketIndex] = new RulesBucket();
-                        }
-                        rulesBucket.AddRule(rule, specificRule, rulesBucketConstructionStateList, rulesBucketIndex);
-                    });
-                });
-            };
-            RulesMap.prototype.GetRule = function (context) {
-                var bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
-                var bucket = this.map[bucketIndex];
-                if (bucket != null) {
-                    for (var _i = 0, _a = bucket.Rules(); _i < _a.length; _i++) {
-                        var rule = _a[_i];
-                        if (rule.Operation.Context.InContext(context)) {
-                            return rule;
-                        }
-                    }
-                }
-                return null;
-            };
-            return RulesMap;
-        }());
-        formatting.RulesMap = RulesMap;
-        var MaskBitSize = 5;
-        var Mask = 0x1f;
-        (function (RulesPosition) {
-            RulesPosition[RulesPosition["IgnoreRulesSpecific"] = 0] = "IgnoreRulesSpecific";
-            RulesPosition[RulesPosition["IgnoreRulesAny"] = MaskBitSize * 1] = "IgnoreRulesAny";
-            RulesPosition[RulesPosition["ContextRulesSpecific"] = MaskBitSize * 2] = "ContextRulesSpecific";
-            RulesPosition[RulesPosition["ContextRulesAny"] = MaskBitSize * 3] = "ContextRulesAny";
-            RulesPosition[RulesPosition["NoContextRulesSpecific"] = MaskBitSize * 4] = "NoContextRulesSpecific";
-            RulesPosition[RulesPosition["NoContextRulesAny"] = MaskBitSize * 5] = "NoContextRulesAny";
-        })(formatting.RulesPosition || (formatting.RulesPosition = {}));
-        var RulesPosition = formatting.RulesPosition;
-        var RulesBucketConstructionState = (function () {
-            function RulesBucketConstructionState() {
-                //// The Rules list contains all the inserted rules into a rulebucket in the following order:
-                ////    1- Ignore rules with specific token combination
-                ////    2- Ignore rules with any token combination
-                ////    3- Context rules with specific token combination
-                ////    4- Context rules with any token combination
-                ////    5- Non-context rules with specific token combination
-                ////    6- Non-context rules with any token combination
-                //// 
-                //// The member rulesInsertionIndexBitmap is used to describe the number of rules
-                //// in each sub-bucket (above) hence can be used to know the index of where to insert 
-                //// the next rule. It's a bitmap which contains 6 different sections each is given 5 bits.
-                ////
-                //// Example:
-                //// In order to insert a rule to the end of sub-bucket (3), we get the index by adding
-                //// the values in the bitmap segments 3rd, 2nd, and 1st.
-                this.rulesInsertionIndexBitmap = 0;
-            }
-            RulesBucketConstructionState.prototype.GetInsertionIndex = function (maskPosition) {
-                var index = 0;
-                var pos = 0;
-                var indexBitmap = this.rulesInsertionIndexBitmap;
-                while (pos <= maskPosition) {
-                    index += (indexBitmap & Mask);
-                    indexBitmap >>= MaskBitSize;
-                    pos += MaskBitSize;
-                }
-                return index;
-            };
-            RulesBucketConstructionState.prototype.IncreaseInsertionIndex = function (maskPosition) {
-                var value = (this.rulesInsertionIndexBitmap >> maskPosition) & Mask;
-                value++;
-                ts.Debug.assert((value & Mask) === value, "Adding more rules into the sub-bucket than allowed. Maximum allowed is 32 rules.");
-                var temp = this.rulesInsertionIndexBitmap & ~(Mask << maskPosition);
-                temp |= value << maskPosition;
-                this.rulesInsertionIndexBitmap = temp;
-            };
-            return RulesBucketConstructionState;
-        }());
-        formatting.RulesBucketConstructionState = RulesBucketConstructionState;
-        var RulesBucket = (function () {
-            function RulesBucket() {
-                this.rules = [];
-            }
-            RulesBucket.prototype.Rules = function () {
-                return this.rules;
-            };
-            RulesBucket.prototype.AddRule = function (rule, specificTokens, constructionState, rulesBucketIndex) {
-                var position;
-                if (rule.Operation.Action === 1 /* Ignore */) {
-                    position = specificTokens ?
-                        RulesPosition.IgnoreRulesSpecific :
-                        RulesPosition.IgnoreRulesAny;
-                }
-                else if (!rule.Operation.Context.IsAny()) {
-                    position = specificTokens ?
-                        RulesPosition.ContextRulesSpecific :
-                        RulesPosition.ContextRulesAny;
-                }
-                else {
-                    position = specificTokens ?
-                        RulesPosition.NoContextRulesSpecific :
-                        RulesPosition.NoContextRulesAny;
-                }
-                var state = constructionState[rulesBucketIndex];
-                if (state === undefined) {
-                    state = constructionState[rulesBucketIndex] = new RulesBucketConstructionState();
-                }
-                var index = state.GetInsertionIndex(position);
-                this.rules.splice(index, 0, rule);
-                state.IncreaseInsertionIndex(position);
-            };
-            return RulesBucket;
-        }());
-        formatting.RulesBucket = RulesBucket;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Shared;
-        (function (Shared) {
-            var TokenRangeAccess = (function () {
-                function TokenRangeAccess(from, to, except) {
-                    this.tokens = [];
-                    for (var token = from; token <= to; token++) {
-                        if (ts.indexOf(except, token) < 0) {
-                            this.tokens.push(token);
-                        }
-                    }
-                }
-                TokenRangeAccess.prototype.GetTokens = function () {
-                    return this.tokens;
-                };
-                TokenRangeAccess.prototype.Contains = function (token) {
-                    return this.tokens.indexOf(token) >= 0;
-                };
-                return TokenRangeAccess;
-            }());
-            Shared.TokenRangeAccess = TokenRangeAccess;
-            var TokenValuesAccess = (function () {
-                function TokenValuesAccess(tks) {
-                    this.tokens = tks && tks.length ? tks : [];
-                }
-                TokenValuesAccess.prototype.GetTokens = function () {
-                    return this.tokens;
-                };
-                TokenValuesAccess.prototype.Contains = function (token) {
-                    return this.tokens.indexOf(token) >= 0;
-                };
-                return TokenValuesAccess;
-            }());
-            Shared.TokenValuesAccess = TokenValuesAccess;
-            var TokenSingleValueAccess = (function () {
-                function TokenSingleValueAccess(token) {
-                    this.token = token;
-                }
-                TokenSingleValueAccess.prototype.GetTokens = function () {
-                    return [this.token];
-                };
-                TokenSingleValueAccess.prototype.Contains = function (tokenValue) {
-                    return tokenValue === this.token;
-                };
-                return TokenSingleValueAccess;
-            }());
-            Shared.TokenSingleValueAccess = TokenSingleValueAccess;
-            var TokenAllAccess = (function () {
-                function TokenAllAccess() {
-                }
-                TokenAllAccess.prototype.GetTokens = function () {
-                    var result = [];
-                    for (var token = 0 /* FirstToken */; token <= 138 /* LastToken */; token++) {
-                        result.push(token);
-                    }
-                    return result;
-                };
-                TokenAllAccess.prototype.Contains = function (tokenValue) {
-                    return true;
-                };
-                TokenAllAccess.prototype.toString = function () {
-                    return "[allTokens]";
-                };
-                return TokenAllAccess;
-            }());
-            Shared.TokenAllAccess = TokenAllAccess;
-            var TokenRange = (function () {
-                function TokenRange(tokenAccess) {
-                    this.tokenAccess = tokenAccess;
-                }
-                TokenRange.FromToken = function (token) {
-                    return new TokenRange(new TokenSingleValueAccess(token));
-                };
-                TokenRange.FromTokens = function (tokens) {
-                    return new TokenRange(new TokenValuesAccess(tokens));
-                };
-                TokenRange.FromRange = function (f, to, except) {
-                    if (except === void 0) { except = []; }
-                    return new TokenRange(new TokenRangeAccess(f, to, except));
-                };
-                TokenRange.AllTokens = function () {
-                    return new TokenRange(new TokenAllAccess());
-                };
-                TokenRange.prototype.GetTokens = function () {
-                    return this.tokenAccess.GetTokens();
-                };
-                TokenRange.prototype.Contains = function (token) {
-                    return this.tokenAccess.Contains(token);
-                };
-                TokenRange.prototype.toString = function () {
-                    return this.tokenAccess.toString();
-                };
-                TokenRange.Any = TokenRange.AllTokens();
-                TokenRange.AnyIncludingMultilineComments = TokenRange.FromTokens(TokenRange.Any.GetTokens().concat([3 /* MultiLineCommentTrivia */]));
-                TokenRange.Keywords = TokenRange.FromRange(70 /* FirstKeyword */, 138 /* LastKeyword */);
-                TokenRange.BinaryOperators = TokenRange.FromRange(25 /* FirstBinaryOperator */, 68 /* LastBinaryOperator */);
-                TokenRange.BinaryKeywordOperators = TokenRange.FromTokens([90 /* InKeyword */, 91 /* InstanceOfKeyword */, 138 /* OfKeyword */, 116 /* AsKeyword */, 124 /* IsKeyword */]);
-                TokenRange.UnaryPrefixOperators = TokenRange.FromTokens([41 /* PlusPlusToken */, 42 /* MinusMinusToken */, 50 /* TildeToken */, 49 /* ExclamationToken */]);
-                TokenRange.UnaryPrefixExpressions = TokenRange.FromTokens([8 /* NumericLiteral */, 69 /* Identifier */, 17 /* OpenParenToken */, 19 /* OpenBracketToken */, 15 /* OpenBraceToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
-                TokenRange.UnaryPreincrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
-                TokenRange.UnaryPostincrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 18 /* CloseParenToken */, 20 /* CloseBracketToken */, 92 /* NewKeyword */]);
-                TokenRange.UnaryPredecrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
-                TokenRange.UnaryPostdecrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 18 /* CloseParenToken */, 20 /* CloseBracketToken */, 92 /* NewKeyword */]);
-                TokenRange.Comments = TokenRange.FromTokens([2 /* SingleLineCommentTrivia */, 3 /* MultiLineCommentTrivia */]);
-                TokenRange.TypeNames = TokenRange.FromTokens([69 /* Identifier */, 130 /* NumberKeyword */, 132 /* StringKeyword */, 120 /* BooleanKeyword */, 133 /* SymbolKeyword */, 103 /* VoidKeyword */, 117 /* AnyKeyword */]);
-                return TokenRange;
-            }());
-            Shared.TokenRange = TokenRange;
-        })(Shared = formatting.Shared || (formatting.Shared = {}));
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='..\services.ts' />
-///<reference path='formattingContext.ts' />
-///<reference path='formattingRequestKind.ts' />
-///<reference path='rule.ts' />
-///<reference path='ruleAction.ts' />
-///<reference path='ruleDescriptor.ts' />
-///<reference path='ruleFlag.ts' />
-///<reference path='ruleOperation.ts' />
-///<reference path='ruleOperationContext.ts' />
-///<reference path='rules.ts' />
-///<reference path='rulesMap.ts' />
-///<reference path='tokenRange.ts' /> 
-/// <reference path="references.ts"/>
-/* tslint:disable:no-null-keyword */
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RulesProvider = (function () {
-            function RulesProvider() {
-                this.globalRules = new formatting.Rules();
-            }
-            RulesProvider.prototype.getRuleName = function (rule) {
-                return this.globalRules.getRuleName(rule);
-            };
-            RulesProvider.prototype.getRuleByName = function (name) {
-                return this.globalRules[name];
-            };
-            RulesProvider.prototype.getRulesMap = function () {
-                return this.rulesMap;
-            };
-            RulesProvider.prototype.ensureUpToDate = function (options) {
-                // TODO: Should this be '==='?
-                if (this.options == null || !ts.compareDataObjects(this.options, options)) {
-                    var activeRules = this.createActiveRules(options);
-                    var rulesMap = formatting.RulesMap.create(activeRules);
-                    this.activeRules = activeRules;
-                    this.rulesMap = rulesMap;
-                    this.options = ts.clone(options);
-                }
-            };
-            RulesProvider.prototype.createActiveRules = function (options) {
-                var rules = this.globalRules.HighPriorityCommonRules.slice(0);
-                if (options.InsertSpaceAfterCommaDelimiter) {
-                    rules.push(this.globalRules.SpaceAfterComma);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterComma);
-                }
-                if (options.InsertSpaceAfterFunctionKeywordForAnonymousFunctions) {
-                    rules.push(this.globalRules.SpaceAfterAnonymousFunctionKeyword);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterAnonymousFunctionKeyword);
-                }
-                if (options.InsertSpaceAfterKeywordsInControlFlowStatements) {
-                    rules.push(this.globalRules.SpaceAfterKeywordInControl);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterKeywordInControl);
-                }
-                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis) {
-                    rules.push(this.globalRules.SpaceAfterOpenParen);
-                    rules.push(this.globalRules.SpaceBeforeCloseParen);
-                    rules.push(this.globalRules.NoSpaceBetweenParens);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenParen);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseParen);
-                    rules.push(this.globalRules.NoSpaceBetweenParens);
-                }
-                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets) {
-                    rules.push(this.globalRules.SpaceAfterOpenBracket);
-                    rules.push(this.globalRules.SpaceBeforeCloseBracket);
-                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenBracket);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseBracket);
-                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
-                }
-                if (options.InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces) {
-                    rules.push(this.globalRules.SpaceAfterTemplateHeadAndMiddle);
-                    rules.push(this.globalRules.SpaceBeforeTemplateMiddleAndTail);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterTemplateHeadAndMiddle);
-                    rules.push(this.globalRules.NoSpaceBeforeTemplateMiddleAndTail);
-                }
-                if (options.InsertSpaceAfterSemicolonInForStatements) {
-                    rules.push(this.globalRules.SpaceAfterSemicolonInFor);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterSemicolonInFor);
-                }
-                if (options.InsertSpaceBeforeAndAfterBinaryOperators) {
-                    rules.push(this.globalRules.SpaceBeforeBinaryOperator);
-                    rules.push(this.globalRules.SpaceAfterBinaryOperator);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceBeforeBinaryOperator);
-                    rules.push(this.globalRules.NoSpaceAfterBinaryOperator);
-                }
-                if (options.PlaceOpenBraceOnNewLineForControlBlocks) {
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInControl);
-                }
-                if (options.PlaceOpenBraceOnNewLineForFunctions) {
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInFunction);
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock);
-                }
-                rules = rules.concat(this.globalRules.LowPriorityCommonRules);
-                return rules;
-            };
-            return RulesProvider;
-        }());
-        formatting.RulesProvider = RulesProvider;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='..\services.ts' />
-///<reference path='formattingScanner.ts' />
-///<reference path='rulesProvider.ts' />
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Constants;
-        (function (Constants) {
-            Constants[Constants["Unknown"] = -1] = "Unknown";
-        })(Constants || (Constants = {}));
-        function formatOnEnter(position, sourceFile, rulesProvider, options) {
-            var line = sourceFile.getLineAndCharacterOfPosition(position).line;
-            if (line === 0) {
-                return [];
-            }
-            // After the enter key, the cursor is now at a new line. The new line may or may not contain non-whitespace characters.
-            // If the new line has only whitespaces, we won't want to format this line, because that would remove the indentation as
-            // trailing whitespaces. So the end of the formatting span should be the later one between:
-            //  1. the end of the previous line
-            //  2. the last non-whitespace character in the current line
-            var endOfFormatSpan = ts.getEndLinePosition(line, sourceFile);
-            while (ts.isWhiteSpace(sourceFile.text.charCodeAt(endOfFormatSpan)) && !ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
-                endOfFormatSpan--;
-            }
-            var span = {
-                // get start position for the previous line
-                pos: ts.getStartPositionOfLine(line - 1, sourceFile),
-                // end value is exclusive so add 1 to the result
-                end: endOfFormatSpan + 1
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 2 /* FormatOnEnter */);
-        }
-        formatting.formatOnEnter = formatOnEnter;
-        function formatOnSemicolon(position, sourceFile, rulesProvider, options) {
-            return formatOutermostParent(position, 23 /* SemicolonToken */, sourceFile, options, rulesProvider, 3 /* FormatOnSemicolon */);
-        }
-        formatting.formatOnSemicolon = formatOnSemicolon;
-        function formatOnClosingCurly(position, sourceFile, rulesProvider, options) {
-            return formatOutermostParent(position, 16 /* CloseBraceToken */, sourceFile, options, rulesProvider, 4 /* FormatOnClosingCurlyBrace */);
-        }
-        formatting.formatOnClosingCurly = formatOnClosingCurly;
-        function formatDocument(sourceFile, rulesProvider, options) {
-            var span = {
-                pos: 0,
-                end: sourceFile.text.length
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 0 /* FormatDocument */);
-        }
-        formatting.formatDocument = formatDocument;
-        function formatSelection(start, end, sourceFile, rulesProvider, options) {
-            // format from the beginning of the line
-            var span = {
-                pos: ts.getLineStartPositionForPosition(start, sourceFile),
-                end: end
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 1 /* FormatSelection */);
-        }
-        formatting.formatSelection = formatSelection;
-        function formatOutermostParent(position, expectedLastToken, sourceFile, options, rulesProvider, requestKind) {
-            var parent = findOutermostParent(position, expectedLastToken, sourceFile);
-            if (!parent) {
-                return [];
-            }
-            var span = {
-                pos: ts.getLineStartPositionForPosition(parent.getStart(sourceFile), sourceFile),
-                end: parent.end
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, requestKind);
-        }
-        function findOutermostParent(position, expectedTokenKind, sourceFile) {
-            var precedingToken = ts.findPrecedingToken(position, sourceFile);
-            // when it is claimed that trigger character was typed at given position
-            // we verify that there is a token with a matching kind whose end is equal to position (because the character was just typed).
-            // If this condition is not hold - then trigger character was typed in some other context,
-            // i.e.in comment and thus should not trigger autoformatting
-            if (!precedingToken ||
-                precedingToken.kind !== expectedTokenKind ||
-                position !== precedingToken.getEnd()) {
-                return undefined;
-            }
-            // walk up and search for the parent node that ends at the same position with precedingToken.
-            // for cases like this
-            //
-            // let x = 1;
-            // while (true) {
-            // }
-            // after typing close curly in while statement we want to reformat just the while statement.
-            // However if we just walk upwards searching for the parent that has the same end value -
-            // we'll end up with the whole source file. isListElement allows to stop on the list element level
-            var current = precedingToken;
-            while (current &&
-                current.parent &&
-                current.parent.end === precedingToken.end &&
-                !isListElement(current.parent, current)) {
-                current = current.parent;
-            }
-            return current;
-        }
-        // Returns true if node is a element in some list in parent
-        // i.e. parent is class declaration with the list of members and node is one of members.
-        function isListElement(parent, node) {
-            switch (parent.kind) {
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                    return ts.rangeContainsRange(parent.members, node);
-                case 225 /* ModuleDeclaration */:
-                    var body = parent.body;
-                    return body && body.kind === 199 /* Block */ && ts.rangeContainsRange(body.statements, node);
-                case 256 /* SourceFile */:
-                case 199 /* Block */:
-                case 226 /* ModuleBlock */:
-                    return ts.rangeContainsRange(parent.statements, node);
-                case 252 /* CatchClause */:
-                    return ts.rangeContainsRange(parent.block.statements, node);
-            }
-            return false;
-        }
-        /** find node that fully contains given text range */
-        function findEnclosingNode(range, sourceFile) {
-            return find(sourceFile);
-            function find(n) {
-                var candidate = ts.forEachChild(n, function (c) { return ts.startEndContainsRange(c.getStart(sourceFile), c.end, range) && c; });
-                if (candidate) {
-                    var result = find(candidate);
-                    if (result) {
-                        return result;
-                    }
-                }
-                return n;
-            }
-        }
-        /** formatting is not applied to ranges that contain parse errors.
-          * This function will return a predicate that for a given text range will tell
-          * if there are any parse errors that overlap with the range.
-          */
-        function prepareRangeContainsErrorFunction(errors, originalRange) {
-            if (!errors.length) {
-                return rangeHasNoErrors;
-            }
-            // pick only errors that fall in range
-            var sorted = errors
-                .filter(function (d) { return ts.rangeOverlapsWithStartEnd(originalRange, d.start, d.start + d.length); })
-                .sort(function (e1, e2) { return e1.start - e2.start; });
-            if (!sorted.length) {
-                return rangeHasNoErrors;
-            }
-            var index = 0;
-            return function (r) {
-                // in current implementation sequence of arguments [r1, r2...] is monotonically increasing.
-                // 'index' tracks the index of the most recent error that was checked.
-                while (true) {
-                    if (index >= sorted.length) {
-                        // all errors in the range were already checked -> no error in specified range
-                        return false;
-                    }
-                    var error = sorted[index];
-                    if (r.end <= error.start) {
-                        // specified range ends before the error refered by 'index' - no error in range
-                        return false;
-                    }
-                    if (ts.startEndOverlapsWithStartEnd(r.pos, r.end, error.start, error.start + error.length)) {
-                        // specified range overlaps with error range
-                        return true;
-                    }
-                    index++;
-                }
-            };
-            function rangeHasNoErrors(r) {
-                return false;
-            }
-        }
-        /**
-          * Start of the original range might fall inside the comment - scanner will not yield appropriate results
-          * This function will look for token that is located before the start of target range
-          * and return its end as start position for the scanner.
-          */
-        function getScanStartPosition(enclosingNode, originalRange, sourceFile) {
-            var start = enclosingNode.getStart(sourceFile);
-            if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
-                return start;
-            }
-            var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile);
-            if (!precedingToken) {
-                // no preceding token found - start from the beginning of enclosing node
-                return enclosingNode.pos;
-            }
-            // preceding token ends after the start of original range (i.e when originalRange.pos falls in the middle of literal)
-            // start from the beginning of enclosingNode to handle the entire 'originalRange'
-            if (precedingToken.end >= originalRange.pos) {
-                return enclosingNode.pos;
-            }
-            return precedingToken.end;
-        }
-        /*
-         * For cases like
-         * if (a ||
-         *     b ||$
-         *     c) {...}
-         * If we hit Enter at $ we want line '    b ||' to be indented.
-         * Formatting will be applied to the last two lines.
-         * Node that fully encloses these lines is binary expression 'a ||...'.
-         * Initial indentation for this node will be 0.
-         * Binary expressions don't introduce new indentation scopes, however it is possible
-         * that some parent node on the same line does - like if statement in this case.
-         * Note that we are considering parents only from the same line with initial node -
-         * if parent is on the different line - its delta was already contributed
-         * to the initial indentation.
-         */
-        function getOwnOrInheritedDelta(n, options, sourceFile) {
-            var previousLine = -1 /* Unknown */;
-            var child;
-            while (n) {
-                var line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
-                if (previousLine !== -1 /* Unknown */ && line !== previousLine) {
-                    break;
-                }
-                if (formatting.SmartIndenter.shouldIndentChildNode(n, child)) {
-                    return options.IndentSize;
-                }
-                previousLine = line;
-                child = n;
-                n = n.parent;
-            }
-            return 0;
-        }
-        function formatSpan(originalRange, sourceFile, options, rulesProvider, requestKind) {
-            var rangeContainsError = prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange);
-            // formatting context is used by rules provider
-            var formattingContext = new formatting.FormattingContext(sourceFile, requestKind);
-            // find the smallest node that fully wraps the range and compute the initial indentation for the node
-            var enclosingNode = findEnclosingNode(originalRange, sourceFile);
-            var formattingScanner = formatting.getFormattingScanner(sourceFile, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end);
-            var initialIndentation = formatting.SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options);
-            var previousRangeHasError;
-            var previousRange;
-            var previousParent;
-            var previousRangeStartLine;
-            var lastIndentedLine;
-            var indentationOnLastIndentedLine;
-            var edits = [];
-            formattingScanner.advance();
-            if (formattingScanner.isOnToken()) {
-                var startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
-                var undecoratedStartLine = startLine;
-                if (enclosingNode.decorators) {
-                    undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
-                }
-                var delta = getOwnOrInheritedDelta(enclosingNode, options, sourceFile);
-                processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
-            }
-            if (!formattingScanner.isOnToken()) {
-                var leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
-                if (leadingTrivia) {
-                    processTrivia(leadingTrivia, enclosingNode, enclosingNode, undefined);
-                    trimTrailingWhitespacesForRemainingRange();
-                }
-            }
-            formattingScanner.close();
-            return edits;
-            // local functions
-            /** Tries to compute the indentation for a list element.
-              * If list element is not in range then
-              * function will pick its actual indentation
-              * so it can be pushed downstream as inherited indentation.
-              * If list element is in the range - its indentation will be equal
-              * to inherited indentation from its predecessors.
-              */
-            function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) {
-                if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) ||
-                    ts.rangeContainsStartEnd(range, startPos, endPos) /* Not to miss zero-range nodes e.g. JsxText */) {
-                    if (inheritedIndentation !== -1 /* Unknown */) {
-                        return inheritedIndentation;
-                    }
-                }
-                else {
-                    var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
-                    var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile);
-                    var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
-                    if (startLine !== parentStartLine || startPos === column) {
-                        return column;
-                    }
-                }
-                return -1 /* Unknown */;
-            }
-            function computeIndentation(node, startLine, inheritedIndentation, parent, parentDynamicIndentation, effectiveParentStartLine) {
-                var indentation = inheritedIndentation;
-                var delta = formatting.SmartIndenter.shouldIndentChildNode(node) ? options.IndentSize : 0;
-                if (effectiveParentStartLine === startLine) {
-                    // if node is located on the same line with the parent
-                    // - inherit indentation from the parent
-                    // - push children if either parent of node itself has non-zero delta
-                    indentation = startLine === lastIndentedLine
-                        ? indentationOnLastIndentedLine
-                        : parentDynamicIndentation.getIndentation();
-                    delta = Math.min(options.IndentSize, parentDynamicIndentation.getDelta(node) + delta);
-                }
-                else if (indentation === -1 /* Unknown */) {
-                    if (formatting.SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement(parent, node, startLine, sourceFile)) {
-                        indentation = parentDynamicIndentation.getIndentation();
-                    }
-                    else {
-                        indentation = parentDynamicIndentation.getIndentation() + parentDynamicIndentation.getDelta(node);
-                    }
-                }
-                return {
-                    indentation: indentation,
-                    delta: delta
-                };
-            }
-            function getFirstNonDecoratorTokenOfNode(node) {
-                if (node.modifiers && node.modifiers.length) {
-                    return node.modifiers[0].kind;
-                }
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */: return 73 /* ClassKeyword */;
-                    case 222 /* InterfaceDeclaration */: return 107 /* InterfaceKeyword */;
-                    case 220 /* FunctionDeclaration */: return 87 /* FunctionKeyword */;
-                    case 224 /* EnumDeclaration */: return 224 /* EnumDeclaration */;
-                    case 149 /* GetAccessor */: return 123 /* GetKeyword */;
-                    case 150 /* SetAccessor */: return 131 /* SetKeyword */;
-                    case 147 /* MethodDeclaration */:
-                        if (node.asteriskToken) {
-                            return 37 /* AsteriskToken */;
-                        }
-                    // fall-through
-                    case 145 /* PropertyDeclaration */:
-                    case 142 /* Parameter */:
-                        return node.name.kind;
-                }
-            }
-            function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
-                return {
-                    getIndentationForComment: function (kind, tokenIndentation, container) {
-                        switch (kind) {
-                            // preceding comment to the token that closes the indentation scope inherits the indentation from the scope
-                            // ..  {
-                            //     // comment
-                            // }
-                            case 16 /* CloseBraceToken */:
-                            case 20 /* CloseBracketToken */:
-                            case 18 /* CloseParenToken */:
-                                return indentation + getEffectiveDelta(delta, container);
-                        }
-                        return tokenIndentation !== -1 /* Unknown */ ? tokenIndentation : indentation;
-                    },
-                    getIndentationForToken: function (line, kind, container) {
-                        if (nodeStartLine !== line && node.decorators) {
-                            if (kind === getFirstNonDecoratorTokenOfNode(node)) {
-                                // if this token is the first token following the list of decorators, we do not need to indent
-                                return indentation;
-                            }
-                        }
-                        switch (kind) {
-                            // open and close brace, 'else' and 'while' (in do statement) tokens has indentation of the parent
-                            case 15 /* OpenBraceToken */:
-                            case 16 /* CloseBraceToken */:
-                            case 19 /* OpenBracketToken */:
-                            case 20 /* CloseBracketToken */:
-                            case 17 /* OpenParenToken */:
-                            case 18 /* CloseParenToken */:
-                            case 80 /* ElseKeyword */:
-                            case 104 /* WhileKeyword */:
-                            case 55 /* AtToken */:
-                                return indentation;
-                            default:
-                                // if token line equals to the line of containing node (this is a first token in the node) - use node indentation
-                                return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
-                        }
-                    },
-                    getIndentation: function () { return indentation; },
-                    getDelta: function (child) { return getEffectiveDelta(delta, child); },
-                    recomputeIndentation: function (lineAdded) {
-                        if (node.parent && formatting.SmartIndenter.shouldIndentChildNode(node.parent, node)) {
-                            if (lineAdded) {
-                                indentation += options.IndentSize;
-                            }
-                            else {
-                                indentation -= options.IndentSize;
-                            }
-                            if (formatting.SmartIndenter.shouldIndentChildNode(node)) {
-                                delta = options.IndentSize;
-                            }
-                            else {
-                                delta = 0;
-                            }
-                        }
-                    }
-                };
-                function getEffectiveDelta(delta, child) {
-                    // Delta value should be zero when the node explicitly prevents indentation of the child node
-                    return formatting.SmartIndenter.nodeWillIndentChild(node, child, true) ? delta : 0;
-                }
-            }
-            function processNode(node, contextNode, nodeStartLine, undecoratedNodeStartLine, indentation, delta) {
-                if (!ts.rangeOverlapsWithStartEnd(originalRange, node.getStart(sourceFile), node.getEnd())) {
-                    return;
-                }
-                var nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
-                // a useful observations when tracking context node
-                //        /
-                //      [a]
-                //   /   |   \
-                //  [b] [c] [d]
-                // node 'a' is a context node for nodes 'b', 'c', 'd'
-                // except for the leftmost leaf token in [b] - in this case context node ('e') is located somewhere above 'a'
-                // this rule can be applied recursively to child nodes of 'a'.
-                //
-                // context node is set to parent node value after processing every child node
-                // context node is set to parent of the token after processing every token
-                var childContextNode = contextNode;
-                // if there are any tokens that logically belong to node and interleave child nodes
-                // such tokens will be consumed in processChildNode for for the child that follows them
-                ts.forEachChild(node, function (child) {
-                    processChildNode(child, /*inheritedIndentation*/ -1 /* Unknown */, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListItem*/ false);
-                }, function (nodes) {
-                    processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
-                });
-                // proceed any tokens in the node that are located after child nodes
-                while (formattingScanner.isOnToken()) {
-                    var tokenInfo = formattingScanner.readTokenInfo(node);
-                    if (tokenInfo.token.end > node.end) {
-                        break;
-                    }
-                    consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation);
-                }
-                function processChildNode(child, inheritedIndentation, parent, parentDynamicIndentation, parentStartLine, undecoratedParentStartLine, isListItem, isFirstListItem) {
-                    var childStartPos = child.getStart(sourceFile);
-                    var childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
-                    var undecoratedChildStartLine = childStartLine;
-                    if (child.decorators) {
-                        undecoratedChildStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(child, sourceFile)).line;
-                    }
-                    // if child is a list item - try to get its indentation
-                    var childIndentationAmount = -1 /* Unknown */;
-                    if (isListItem) {
-                        childIndentationAmount = tryComputeIndentationForListItem(childStartPos, child.end, parentStartLine, originalRange, inheritedIndentation);
-                        if (childIndentationAmount !== -1 /* Unknown */) {
-                            inheritedIndentation = childIndentationAmount;
-                        }
-                    }
-                    // child node is outside the target range - do not dive inside
-                    if (!ts.rangeOverlapsWithStartEnd(originalRange, child.pos, child.end)) {
-                        return inheritedIndentation;
-                    }
-                    if (child.getFullWidth() === 0) {
-                        return inheritedIndentation;
-                    }
-                    while (formattingScanner.isOnToken()) {
-                        // proceed any parent tokens that are located prior to child.getStart()
-                        var tokenInfo = formattingScanner.readTokenInfo(node);
-                        if (tokenInfo.token.end > childStartPos) {
-                            // stop when formatting scanner advances past the beginning of the child
-                            break;
-                        }
-                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation);
-                    }
-                    if (!formattingScanner.isOnToken()) {
-                        return inheritedIndentation;
-                    }
-                    if (ts.isToken(child)) {
-                        // if child node is a token, it does not impact indentation, proceed it using parent indentation scope rules
-                        var tokenInfo = formattingScanner.readTokenInfo(child);
-                        ts.Debug.assert(tokenInfo.token.end === child.end);
-                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
-                        return inheritedIndentation;
-                    }
-                    var effectiveParentStartLine = child.kind === 143 /* Decorator */ ? childStartLine : undecoratedParentStartLine;
-                    var childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
-                    processNode(child, childContextNode, childStartLine, undecoratedChildStartLine, childIndentation.indentation, childIndentation.delta);
-                    childContextNode = node;
-                    if (isFirstListItem && parent.kind === 170 /* ArrayLiteralExpression */ && inheritedIndentation === -1 /* Unknown */) {
-                        inheritedIndentation = childIndentation.indentation;
-                    }
-                    return inheritedIndentation;
-                }
-                function processChildNodes(nodes, parent, parentStartLine, parentDynamicIndentation) {
-                    var listStartToken = getOpenTokenForList(parent, nodes);
-                    var listEndToken = getCloseTokenForOpenToken(listStartToken);
-                    var listDynamicIndentation = parentDynamicIndentation;
-                    var startLine = parentStartLine;
-                    if (listStartToken !== 0 /* Unknown */) {
-                        // introduce a new indentation scope for lists (including list start and end tokens)
-                        while (formattingScanner.isOnToken()) {
-                            var tokenInfo = formattingScanner.readTokenInfo(parent);
-                            if (tokenInfo.token.end > nodes.pos) {
-                                // stop when formatting scanner moves past the beginning of node list
-                                break;
-                            }
-                            else if (tokenInfo.token.kind === listStartToken) {
-                                // consume list start token
-                                startLine = sourceFile.getLineAndCharacterOfPosition(tokenInfo.token.pos).line;
-                                var indentation_1 = computeIndentation(tokenInfo.token, startLine, -1 /* Unknown */, parent, parentDynamicIndentation, parentStartLine);
-                                listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation_1.indentation, indentation_1.delta);
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
-                            }
-                            else {
-                                // consume any tokens that precede the list as child elements of 'node' using its indentation scope
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation);
-                            }
-                        }
-                    }
-                    var inheritedIndentation = -1 /* Unknown */;
-                    for (var i = 0; i < nodes.length; i++) {
-                        var child = nodes[i];
-                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListItem*/ true, /*isFirstListItem*/ i === 0);
-                    }
-                    if (listEndToken !== 0 /* Unknown */) {
-                        if (formattingScanner.isOnToken()) {
-                            var tokenInfo = formattingScanner.readTokenInfo(parent);
-                            // consume the list end token only if it is still belong to the parent
-                            // there might be the case when current token matches end token but does not considered as one
-                            // function (x: function) <--
-                            // without this check close paren will be interpreted as list end token for function expression which is wrong
-                            if (tokenInfo.token.kind === listEndToken && ts.rangeContainsRange(parent, tokenInfo.token)) {
-                                // consume list end token
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
-                            }
-                        }
-                    }
-                }
-                function consumeTokenAndAdvanceScanner(currentTokenInfo, parent, dynamicIndentation, container) {
-                    ts.Debug.assert(ts.rangeContainsRange(parent, currentTokenInfo.token));
-                    var lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
-                    var indentToken = false;
-                    if (currentTokenInfo.leadingTrivia) {
-                        processTrivia(currentTokenInfo.leadingTrivia, parent, childContextNode, dynamicIndentation);
-                    }
-                    var lineAdded;
-                    var isTokenInRange = ts.rangeContainsRange(originalRange, currentTokenInfo.token);
-                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
-                    if (isTokenInRange) {
-                        var rangeHasError = rangeContainsError(currentTokenInfo.token);
-                        // save previousRange since processRange will overwrite this value with current one
-                        var savePreviousRange = previousRange;
-                        lineAdded = processRange(currentTokenInfo.token, tokenStart, parent, childContextNode, dynamicIndentation);
-                        if (rangeHasError) {
-                            // do not indent comments\token if token range overlaps with some error
-                            indentToken = false;
-                        }
-                        else {
-                            if (lineAdded !== undefined) {
-                                indentToken = lineAdded;
-                            }
-                            else {
-                                // indent token only if end line of previous range does not match start line of the token
-                                var prevEndLine = savePreviousRange && sourceFile.getLineAndCharacterOfPosition(savePreviousRange.end).line;
-                                indentToken = lastTriviaWasNewLine && tokenStart.line !== prevEndLine;
-                            }
-                        }
-                    }
-                    if (currentTokenInfo.trailingTrivia) {
-                        processTrivia(currentTokenInfo.trailingTrivia, parent, childContextNode, dynamicIndentation);
-                    }
-                    if (indentToken) {
-                        var tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
-                            dynamicIndentation.getIndentationForToken(tokenStart.line, currentTokenInfo.token.kind, container) :
-                            -1 /* Unknown */;
-                        var indentNextTokenOrTrivia = true;
-                        if (currentTokenInfo.leadingTrivia) {
-                            var commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
-                            for (var _i = 0, _a = currentTokenInfo.leadingTrivia; _i < _a.length; _i++) {
-                                var triviaItem = _a[_i];
-                                var triviaInRange = ts.rangeContainsRange(originalRange, triviaItem);
-                                switch (triviaItem.kind) {
-                                    case 3 /* MultiLineCommentTrivia */:
-                                        if (triviaInRange) {
-                                            indentMultilineComment(triviaItem, commentIndentation, /*firstLineIsIndented*/ !indentNextTokenOrTrivia);
-                                        }
-                                        indentNextTokenOrTrivia = false;
-                                        break;
-                                    case 2 /* SingleLineCommentTrivia */:
-                                        if (indentNextTokenOrTrivia && triviaInRange) {
-                                            insertIndentation(triviaItem.pos, commentIndentation, /*lineAdded*/ false);
-                                        }
-                                        indentNextTokenOrTrivia = false;
-                                        break;
-                                    case 4 /* NewLineTrivia */:
-                                        indentNextTokenOrTrivia = true;
-                                        break;
-                                }
-                            }
-                        }
-                        // indent token only if is it is in target range and does not overlap with any error ranges
-                        if (tokenIndentation !== -1 /* Unknown */ && indentNextTokenOrTrivia) {
-                            insertIndentation(currentTokenInfo.token.pos, tokenIndentation, lineAdded);
-                            lastIndentedLine = tokenStart.line;
-                            indentationOnLastIndentedLine = tokenIndentation;
-                        }
-                    }
-                    formattingScanner.advance();
-                    childContextNode = parent;
-                }
-            }
-            function processTrivia(trivia, parent, contextNode, dynamicIndentation) {
-                for (var _i = 0, trivia_1 = trivia; _i < trivia_1.length; _i++) {
-                    var triviaItem = trivia_1[_i];
-                    if (ts.isComment(triviaItem.kind) && ts.rangeContainsRange(originalRange, triviaItem)) {
-                        var triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
-                        processRange(triviaItem, triviaItemStart, parent, contextNode, dynamicIndentation);
-                    }
-                }
-            }
-            function processRange(range, rangeStart, parent, contextNode, dynamicIndentation) {
-                var rangeHasError = rangeContainsError(range);
-                var lineAdded;
-                if (!rangeHasError && !previousRangeHasError) {
-                    if (!previousRange) {
-                        // trim whitespaces starting from the beginning of the span up to the current line
-                        var originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
-                        trimTrailingWhitespacesForLines(originalStart.line, rangeStart.line);
-                    }
-                    else {
-                        lineAdded =
-                            processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation);
-                    }
-                }
-                previousRange = range;
-                previousParent = parent;
-                previousRangeStartLine = rangeStart.line;
-                previousRangeHasError = rangeHasError;
-                return lineAdded;
-            }
-            function processPair(currentItem, currentStartLine, currentParent, previousItem, previousStartLine, previousParent, contextNode, dynamicIndentation) {
-                formattingContext.updateContext(previousItem, previousParent, currentItem, currentParent, contextNode);
-                var rule = rulesProvider.getRulesMap().GetRule(formattingContext);
-                var trimTrailingWhitespaces;
-                var lineAdded;
-                if (rule) {
-                    applyRuleEdits(rule, previousItem, previousStartLine, currentItem, currentStartLine);
-                    if (rule.Operation.Action & (2 /* Space */ | 8 /* Delete */) && currentStartLine !== previousStartLine) {
-                        lineAdded = false;
-                        // Handle the case where the next line is moved to be the end of this line.
-                        // In this case we don't indent the next line in the next pass.
-                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ false);
-                        }
-                    }
-                    else if (rule.Operation.Action & 4 /* NewLine */ && currentStartLine === previousStartLine) {
-                        lineAdded = true;
-                        // Handle the case where token2 is moved to the new line.
-                        // In this case we indent token2 in the next pass but we set
-                        // sameLineIndent flag to notify the indenter that the indentation is within the line.
-                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ true);
-                        }
-                    }
-                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
-                    trimTrailingWhitespaces = !(rule.Operation.Action & 8 /* Delete */) && rule.Flag !== 1 /* CanDeleteNewLines */;
-                }
-                else {
-                    trimTrailingWhitespaces = true;
-                }
-                if (currentStartLine !== previousStartLine && trimTrailingWhitespaces) {
-                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
-                    trimTrailingWhitespacesForLines(previousStartLine, currentStartLine, previousItem);
-                }
-                return lineAdded;
-            }
-            function insertIndentation(pos, indentation, lineAdded) {
-                var indentationString = getIndentationString(indentation, options);
-                if (lineAdded) {
-                    // new line is added before the token by the formatting rules
-                    // insert indentation string at the very beginning of the token
-                    recordReplace(pos, 0, indentationString);
-                }
-                else {
-                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
-                    var startLinePosition = ts.getStartPositionOfLine(tokenStart.line, sourceFile);
-                    if (indentation !== tokenStart.character || indentationIsDifferent(indentationString, startLinePosition)) {
-                        recordReplace(startLinePosition, tokenStart.character, indentationString);
-                    }
-                }
-            }
-            function indentationIsDifferent(indentationString, startLinePosition) {
-                return indentationString !== sourceFile.text.substr(startLinePosition, indentationString.length);
-            }
-            function indentMultilineComment(commentRange, indentation, firstLineIsIndented) {
-                // split comment in lines
-                var startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
-                var endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
-                var parts;
-                if (startLine === endLine) {
-                    if (!firstLineIsIndented) {
-                        // treat as single line comment
-                        insertIndentation(commentRange.pos, indentation, /*lineAdded*/ false);
-                    }
-                    return;
-                }
-                else {
-                    parts = [];
-                    var startPos = commentRange.pos;
-                    for (var line = startLine; line < endLine; line++) {
-                        var endOfLine = ts.getEndLinePosition(line, sourceFile);
-                        parts.push({ pos: startPos, end: endOfLine });
-                        startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
-                    }
-                    parts.push({ pos: startPos, end: commentRange.end });
-                }
-                var startLinePos = ts.getStartPositionOfLine(startLine, sourceFile);
-                var nonWhitespaceColumnInFirstPart = formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(startLinePos, parts[0].pos, sourceFile, options);
-                if (indentation === nonWhitespaceColumnInFirstPart.column) {
-                    return;
-                }
-                var startIndex = 0;
-                if (firstLineIsIndented) {
-                    startIndex = 1;
-                    startLine++;
-                }
-                // shift all parts on the delta size
-                var delta = indentation - nonWhitespaceColumnInFirstPart.column;
-                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
-                    var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
-                    var nonWhitespaceCharacterAndColumn = i === 0
-                        ? nonWhitespaceColumnInFirstPart
-                        : formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(parts[i].pos, parts[i].end, sourceFile, options);
-                    var newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
-                    if (newIndentation > 0) {
-                        var indentationString = getIndentationString(newIndentation, options);
-                        recordReplace(startLinePos_1, nonWhitespaceCharacterAndColumn.character, indentationString);
-                    }
-                    else {
-                        recordDelete(startLinePos_1, nonWhitespaceCharacterAndColumn.character);
-                    }
-                }
-            }
-            function trimTrailingWhitespacesForLines(line1, line2, range) {
-                for (var line = line1; line < line2; line++) {
-                    var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
-                    var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
-                    // do not trim whitespaces in comments or template expression
-                    if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
-                        continue;
-                    }
-                    var whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
-                    if (whitespaceStart !== -1) {
-                        ts.Debug.assert(whitespaceStart === lineStartPosition || !ts.isWhiteSpace(sourceFile.text.charCodeAt(whitespaceStart - 1)));
-                        recordDelete(whitespaceStart, lineEndPosition + 1 - whitespaceStart);
-                    }
-                }
-            }
-            /**
-             * @param start The position of the first character in range
-             * @param end The position of the last character in range
-             */
-            function getTrailingWhitespaceStartPosition(start, end) {
-                var pos = end;
-                while (pos >= start && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
-                    pos--;
-                }
-                if (pos !== end) {
-                    return pos + 1;
-                }
-                return -1;
-            }
-            /**
-             * Trimming will be done for lines after the previous range
-             */
-            function trimTrailingWhitespacesForRemainingRange() {
-                var startPosition = previousRange ? previousRange.end : originalRange.pos;
-                var startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
-                var endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
-                trimTrailingWhitespacesForLines(startLine, endLine + 1, previousRange);
-            }
-            function newTextChange(start, len, newText) {
-                return { span: ts.createTextSpan(start, len), newText: newText };
-            }
-            function recordDelete(start, len) {
-                if (len) {
-                    edits.push(newTextChange(start, len, ""));
-                }
-            }
-            function recordReplace(start, len, newText) {
-                if (len || newText) {
-                    edits.push(newTextChange(start, len, newText));
-                }
-            }
-            function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
-                switch (rule.Operation.Action) {
-                    case 1 /* Ignore */:
-                        // no action required
-                        return;
-                    case 8 /* Delete */:
-                        if (previousRange.end !== currentRange.pos) {
-                            // delete characters starting from t1.end up to t2.pos exclusive
-                            recordDelete(previousRange.end, currentRange.pos - previousRange.end);
-                        }
-                        break;
-                    case 4 /* NewLine */:
-                        // exit early if we on different lines and rule cannot change number of newlines
-                        // if line1 and line2 are on subsequent lines then no edits are required - ok to exit
-                        // if line1 and line2 are separated with more than one newline - ok to exit since we cannot delete extra new lines
-                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
-                            return;
-                        }
-                        // edit should not be applied only if we have one line feed between elements
-                        var lineDelta = currentStartLine - previousStartLine;
-                        if (lineDelta !== 1) {
-                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, options.NewLineCharacter);
-                        }
-                        break;
-                    case 2 /* Space */:
-                        // exit early if we on different lines and rule cannot change number of newlines
-                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
-                            return;
-                        }
-                        var posDelta = currentRange.pos - previousRange.end;
-                        if (posDelta !== 1 || sourceFile.text.charCodeAt(previousRange.end) !== 32 /* space */) {
-                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, " ");
-                        }
-                        break;
-                }
-            }
-        }
-        function getOpenTokenForList(node, list) {
-            switch (node.kind) {
-                case 148 /* Constructor */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 180 /* ArrowFunction */:
-                    if (node.typeParameters === list) {
-                        return 25 /* LessThanToken */;
-                    }
-                    else if (node.parameters === list) {
-                        return 17 /* OpenParenToken */;
-                    }
-                    break;
-                case 174 /* CallExpression */:
-                case 175 /* NewExpression */:
-                    if (node.typeArguments === list) {
-                        return 25 /* LessThanToken */;
-                    }
-                    else if (node.arguments === list) {
-                        return 17 /* OpenParenToken */;
-                    }
-                    break;
-                case 155 /* TypeReference */:
-                    if (node.typeArguments === list) {
-                        return 25 /* LessThanToken */;
-                    }
-            }
-            return 0 /* Unknown */;
-        }
-        function getCloseTokenForOpenToken(kind) {
-            switch (kind) {
-                case 17 /* OpenParenToken */:
-                    return 18 /* CloseParenToken */;
-                case 25 /* LessThanToken */:
-                    return 27 /* GreaterThanToken */;
-            }
-            return 0 /* Unknown */;
-        }
-        var internedSizes;
-        var internedTabsIndentation;
-        var internedSpacesIndentation;
-        function getIndentationString(indentation, options) {
-            // reset interned strings if FormatCodeOptions were changed
-            var resetInternedStrings = !internedSizes || (internedSizes.tabSize !== options.TabSize || internedSizes.indentSize !== options.IndentSize);
-            if (resetInternedStrings) {
-                internedSizes = { tabSize: options.TabSize, indentSize: options.IndentSize };
-                internedTabsIndentation = internedSpacesIndentation = undefined;
-            }
-            if (!options.ConvertTabsToSpaces) {
-                var tabs = Math.floor(indentation / options.TabSize);
-                var spaces = indentation - tabs * options.TabSize;
-                var tabString = void 0;
-                if (!internedTabsIndentation) {
-                    internedTabsIndentation = [];
-                }
-                if (internedTabsIndentation[tabs] === undefined) {
-                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
-                }
-                else {
-                    tabString = internedTabsIndentation[tabs];
-                }
-                return spaces ? tabString + repeat(" ", spaces) : tabString;
-            }
-            else {
-                var spacesString = void 0;
-                var quotient = Math.floor(indentation / options.IndentSize);
-                var remainder = indentation % options.IndentSize;
-                if (!internedSpacesIndentation) {
-                    internedSpacesIndentation = [];
-                }
-                if (internedSpacesIndentation[quotient] === undefined) {
-                    spacesString = repeat(" ", options.IndentSize * quotient);
-                    internedSpacesIndentation[quotient] = spacesString;
-                }
-                else {
-                    spacesString = internedSpacesIndentation[quotient];
-                }
-                return remainder ? spacesString + repeat(" ", remainder) : spacesString;
-            }
-            function repeat(value, count) {
-                var s = "";
-                for (var i = 0; i < count; i++) {
-                    s += value;
-                }
-                return s;
-            }
-        }
-        formatting.getIndentationString = getIndentationString;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='..\services.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var SmartIndenter;
-        (function (SmartIndenter) {
-            var Value;
-            (function (Value) {
-                Value[Value["Unknown"] = -1] = "Unknown";
-            })(Value || (Value = {}));
-            function getIndentation(position, sourceFile, options) {
-                if (position > sourceFile.text.length) {
-                    return 0; // past EOF
-                }
-                // no indentation when the indent style is set to none,
-                // so we can return fast
-                if (options.IndentStyle === ts.IndentStyle.None) {
-                    return 0;
-                }
-                var precedingToken = ts.findPrecedingToken(position, sourceFile);
-                if (!precedingToken) {
-                    return 0;
-                }
-                // no indentation in string \regex\template literals
-                var precedingTokenIsLiteral = ts.isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
-                if (precedingTokenIsLiteral && precedingToken.getStart(sourceFile) <= position && precedingToken.end > position) {
-                    return 0;
-                }
-                var lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
-                // indentation is first non-whitespace character in a previous line
-                // for block indentation, we should look for a line which contains something that's not
-                // whitespace.
-                if (options.IndentStyle === ts.IndentStyle.Block) {
-                    // move backwards until we find a line with a non-whitespace character,
-                    // then find the first non-whitespace character for that line.
-                    var current_1 = position;
-                    while (current_1 > 0) {
-                        var char = sourceFile.text.charCodeAt(current_1);
-                        if (!ts.isWhiteSpace(char) && !ts.isLineBreak(char)) {
-                            break;
-                        }
-                        current_1--;
-                    }
-                    var lineStart = ts.getLineStartPositionForPosition(current_1, sourceFile);
-                    return SmartIndenter.findFirstNonWhitespaceColumn(lineStart, current_1, sourceFile, options);
-                }
-                if (precedingToken.kind === 24 /* CommaToken */ && precedingToken.parent.kind !== 187 /* BinaryExpression */) {
-                    // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
-                    var actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
-                    if (actualIndentation !== -1 /* Unknown */) {
-                        return actualIndentation;
-                    }
-                }
-                // try to find node that can contribute to indentation and includes 'position' starting from 'precedingToken'
-                // if such node is found - compute initial indentation for 'position' inside this node
-                var previous;
-                var current = precedingToken;
-                var currentStart;
-                var indentationDelta;
-                while (current) {
-                    if (ts.positionBelongsToNode(current, position, sourceFile) && shouldIndentChildNode(current, previous)) {
-                        currentStart = getStartLineAndCharacterForNode(current, sourceFile);
-                        if (nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile)) {
-                            indentationDelta = 0;
-                        }
-                        else {
-                            indentationDelta = lineAtPosition !== currentStart.line ? options.IndentSize : 0;
-                        }
-                        break;
-                    }
-                    // check if current node is a list item - if yes, take indentation from it
-                    var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
-                    if (actualIndentation !== -1 /* Unknown */) {
-                        return actualIndentation;
-                    }
-                    actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
-                    if (actualIndentation !== -1 /* Unknown */) {
-                        return actualIndentation + options.IndentSize;
-                    }
-                    previous = current;
-                    current = current.parent;
-                }
-                if (!current) {
-                    // no parent was found - return 0 to be indented on the level of SourceFile
-                    return 0;
-                }
-                return getIndentationForNodeWorker(current, currentStart, /*ignoreActualIndentationRange*/ undefined, indentationDelta, sourceFile, options);
-            }
-            SmartIndenter.getIndentation = getIndentation;
-            function getIndentationForNode(n, ignoreActualIndentationRange, sourceFile, options) {
-                var start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
-                return getIndentationForNodeWorker(n, start, ignoreActualIndentationRange, /*indentationDelta*/ 0, sourceFile, options);
-            }
-            SmartIndenter.getIndentationForNode = getIndentationForNode;
-            function getIndentationForNodeWorker(current, currentStart, ignoreActualIndentationRange, indentationDelta, sourceFile, options) {
-                var parent = current.parent;
-                var parentStart;
-                // walk upwards and collect indentations for pairs of parent-child nodes
-                // indentation is not added if parent and child nodes start on the same line or if parent is IfStatement and child starts on the same line with 'else clause'
-                while (parent) {
-                    var useActualIndentation = true;
-                    if (ignoreActualIndentationRange) {
-                        var start = current.getStart(sourceFile);
-                        useActualIndentation = start < ignoreActualIndentationRange.pos || start > ignoreActualIndentationRange.end;
-                    }
-                    if (useActualIndentation) {
-                        // check if current node is a list item - if yes, take indentation from it
-                        var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
-                        if (actualIndentation !== -1 /* Unknown */) {
-                            return actualIndentation + indentationDelta;
-                        }
-                    }
-                    parentStart = getParentStart(parent, current, sourceFile);
-                    var parentAndChildShareLine = parentStart.line === currentStart.line ||
-                        childStartsOnTheSameLineWithElseInIfStatement(parent, current, currentStart.line, sourceFile);
-                    if (useActualIndentation) {
-                        // try to fetch actual indentation for current node from source text
-                        var actualIndentation = getActualIndentationForNode(current, parent, currentStart, parentAndChildShareLine, sourceFile, options);
-                        if (actualIndentation !== -1 /* Unknown */) {
-                            return actualIndentation + indentationDelta;
-                        }
-                        actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
-                        if (actualIndentation !== -1 /* Unknown */) {
-                            return actualIndentation + indentationDelta;
-                        }
-                    }
-                    // increase indentation if parent node wants its content to be indented and parent and child nodes don't start on the same line
-                    if (shouldIndentChildNode(parent, current) && !parentAndChildShareLine) {
-                        indentationDelta += options.IndentSize;
-                    }
-                    current = parent;
-                    currentStart = parentStart;
-                    parent = current.parent;
-                }
-                return indentationDelta;
-            }
-            function getParentStart(parent, child, sourceFile) {
-                var containingList = getContainingList(child, sourceFile);
-                if (containingList) {
-                    return sourceFile.getLineAndCharacterOfPosition(containingList.pos);
-                }
-                return sourceFile.getLineAndCharacterOfPosition(parent.getStart(sourceFile));
-            }
-            /*
-             * Function returns Value.Unknown if indentation cannot be determined
-             */
-            function getActualIndentationForListItemBeforeComma(commaToken, sourceFile, options) {
-                // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
-                var commaItemInfo = ts.findListItemInfo(commaToken);
-                if (commaItemInfo && commaItemInfo.listItemIndex > 0) {
-                    return deriveActualIndentationFromList(commaItemInfo.list.getChildren(), commaItemInfo.listItemIndex - 1, sourceFile, options);
-                }
-                else {
-                    // handle broken code gracefully
-                    return -1 /* Unknown */;
-                }
-            }
-            /*
-             * Function returns Value.Unknown if actual indentation for node should not be used (i.e because node is nested expression)
-             */
-            function getActualIndentationForNode(current, parent, currentLineAndChar, parentAndChildShareLine, sourceFile, options) {
-                // actual indentation is used for statements\declarations if one of cases below is true:
-                // - parent is SourceFile - by default immediate children of SourceFile are not indented except when user indents them manually
-                // - parent and child are not on the same line
-                var useActualIndentation = (ts.isDeclaration(current) || ts.isStatement(current)) &&
-                    (parent.kind === 256 /* SourceFile */ || !parentAndChildShareLine);
-                if (!useActualIndentation) {
-                    return -1 /* Unknown */;
-                }
-                return findColumnForFirstNonWhitespaceCharacterInLine(currentLineAndChar, sourceFile, options);
-            }
-            function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile) {
-                var nextToken = ts.findNextToken(precedingToken, current);
-                if (!nextToken) {
-                    return false;
-                }
-                if (nextToken.kind === 15 /* OpenBraceToken */) {
-                    // open braces are always indented at the parent level
-                    return true;
-                }
-                else if (nextToken.kind === 16 /* CloseBraceToken */) {
-                    // close braces are indented at the parent level if they are located on the same line with cursor
-                    // this means that if new line will be added at $ position, this case will be indented
-                    // class A {
-                    //    $
-                    // }
-                    /// and this one - not
-                    // class A {
-                    // $}
-                    var nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
-                    return lineAtPosition === nextTokenStartLine;
-                }
-                return false;
-            }
-            function getStartLineAndCharacterForNode(n, sourceFile) {
-                return sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
-            }
-            function childStartsOnTheSameLineWithElseInIfStatement(parent, child, childStartLine, sourceFile) {
-                if (parent.kind === 203 /* IfStatement */ && parent.elseStatement === child) {
-                    var elseKeyword = ts.findChildOfKind(parent, 80 /* ElseKeyword */, sourceFile);
-                    ts.Debug.assert(elseKeyword !== undefined);
-                    var elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
-                    return elseKeywordStartLine === childStartLine;
-                }
-                return false;
-            }
-            SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement = childStartsOnTheSameLineWithElseInIfStatement;
-            function getContainingList(node, sourceFile) {
-                if (node.parent) {
-                    switch (node.parent.kind) {
-                        case 155 /* TypeReference */:
-                            if (node.parent.typeArguments &&
-                                ts.rangeContainsStartEnd(node.parent.typeArguments, node.getStart(sourceFile), node.getEnd())) {
-                                return node.parent.typeArguments;
-                            }
-                            break;
-                        case 171 /* ObjectLiteralExpression */:
-                            return node.parent.properties;
-                        case 170 /* ArrayLiteralExpression */:
-                            return node.parent.elements;
-                        case 220 /* FunctionDeclaration */:
-                        case 179 /* FunctionExpression */:
-                        case 180 /* ArrowFunction */:
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 151 /* CallSignature */:
-                        case 152 /* ConstructSignature */: {
-                            var start = node.getStart(sourceFile);
-                            if (node.parent.typeParameters &&
-                                ts.rangeContainsStartEnd(node.parent.typeParameters, start, node.getEnd())) {
-                                return node.parent.typeParameters;
-                            }
-                            if (ts.rangeContainsStartEnd(node.parent.parameters, start, node.getEnd())) {
-                                return node.parent.parameters;
-                            }
-                            break;
-                        }
-                        case 175 /* NewExpression */:
-                        case 174 /* CallExpression */: {
-                            var start = node.getStart(sourceFile);
-                            if (node.parent.typeArguments &&
-                                ts.rangeContainsStartEnd(node.parent.typeArguments, start, node.getEnd())) {
-                                return node.parent.typeArguments;
-                            }
-                            if (node.parent.arguments &&
-                                ts.rangeContainsStartEnd(node.parent.arguments, start, node.getEnd())) {
-                                return node.parent.arguments;
-                            }
-                            break;
-                        }
-                    }
-                }
-                return undefined;
-            }
-            function getActualIndentationForListItem(node, sourceFile, options) {
-                var containingList = getContainingList(node, sourceFile);
-                return containingList ? getActualIndentationFromList(containingList) : -1 /* Unknown */;
-                function getActualIndentationFromList(list) {
-                    var index = ts.indexOf(list, node);
-                    return index !== -1 ? deriveActualIndentationFromList(list, index, sourceFile, options) : -1 /* Unknown */;
-                }
-            }
-            function getLineIndentationWhenExpressionIsInMultiLine(node, sourceFile, options) {
-                // actual indentation should not be used when:
-                // - node is close parenthesis - this is the end of the expression
-                if (node.kind === 18 /* CloseParenToken */) {
-                    return -1 /* Unknown */;
-                }
-                if (node.parent && (node.parent.kind === 174 /* CallExpression */ ||
-                    node.parent.kind === 175 /* NewExpression */) &&
-                    node.parent.expression !== node) {
-                    var fullCallOrNewExpression = node.parent.expression;
-                    var startingExpression = getStartingExpression(fullCallOrNewExpression);
-                    if (fullCallOrNewExpression === startingExpression) {
-                        return -1 /* Unknown */;
-                    }
-                    var fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
-                    var startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
-                    if (fullCallOrNewExpressionEnd.line === startingExpressionEnd.line) {
-                        return -1 /* Unknown */;
-                    }
-                    return findColumnForFirstNonWhitespaceCharacterInLine(fullCallOrNewExpressionEnd, sourceFile, options);
-                }
-                return -1 /* Unknown */;
-                function getStartingExpression(node) {
-                    while (true) {
-                        switch (node.kind) {
-                            case 174 /* CallExpression */:
-                            case 175 /* NewExpression */:
-                            case 172 /* PropertyAccessExpression */:
-                            case 173 /* ElementAccessExpression */:
-                                node = node.expression;
-                                break;
-                            default:
-                                return node;
-                        }
-                    }
-                }
-            }
-            function deriveActualIndentationFromList(list, index, sourceFile, options) {
-                ts.Debug.assert(index >= 0 && index < list.length);
-                var node = list[index];
-                // walk toward the start of the list starting from current node and check if the line is the same for all items.
-                // if end line for item [i - 1] differs from the start line for item [i] - find column of the first non-whitespace character on the line of item [i]
-                var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
-                for (var i = index - 1; i >= 0; i--) {
-                    if (list[i].kind === 24 /* CommaToken */) {
-                        continue;
-                    }
-                    // skip list items that ends on the same line with the current list element
-                    var prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
-                    if (prevEndLine !== lineAndCharacter.line) {
-                        return findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options);
-                    }
-                    lineAndCharacter = getStartLineAndCharacterForNode(list[i], sourceFile);
-                }
-                return -1 /* Unknown */;
-            }
-            function findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options) {
-                var lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
-                return findFirstNonWhitespaceColumn(lineStart, lineStart + lineAndCharacter.character, sourceFile, options);
-            }
-            /*
-                Character is the actual index of the character since the beginning of the line.
-                Column - position of the character after expanding tabs to spaces
-                "0\t2$"
-                value of 'character' for '$' is 3
-                value of 'column' for '$' is 6 (assuming that tab size is 4)
-            */
-            function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
-                var character = 0;
-                var column = 0;
-                for (var pos = startPos; pos < endPos; pos++) {
-                    var ch = sourceFile.text.charCodeAt(pos);
-                    if (!ts.isWhiteSpace(ch)) {
-                        break;
-                    }
-                    if (ch === 9 /* tab */) {
-                        column += options.TabSize + (column % options.TabSize);
-                    }
-                    else {
-                        column++;
-                    }
-                    character++;
-                }
-                return { column: column, character: character };
-            }
-            SmartIndenter.findFirstNonWhitespaceCharacterAndColumn = findFirstNonWhitespaceCharacterAndColumn;
-            function findFirstNonWhitespaceColumn(startPos, endPos, sourceFile, options) {
-                return findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options).column;
-            }
-            SmartIndenter.findFirstNonWhitespaceColumn = findFirstNonWhitespaceColumn;
-            function nodeContentIsAlwaysIndented(kind) {
-                switch (kind) {
-                    case 202 /* ExpressionStatement */:
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 170 /* ArrayLiteralExpression */:
-                    case 199 /* Block */:
-                    case 226 /* ModuleBlock */:
-                    case 171 /* ObjectLiteralExpression */:
-                    case 159 /* TypeLiteral */:
-                    case 161 /* TupleType */:
-                    case 227 /* CaseBlock */:
-                    case 250 /* DefaultClause */:
-                    case 249 /* CaseClause */:
-                    case 178 /* ParenthesizedExpression */:
-                    case 172 /* PropertyAccessExpression */:
-                    case 174 /* CallExpression */:
-                    case 175 /* NewExpression */:
-                    case 200 /* VariableStatement */:
-                    case 218 /* VariableDeclaration */:
-                    case 235 /* ExportAssignment */:
-                    case 211 /* ReturnStatement */:
-                    case 188 /* ConditionalExpression */:
-                    case 168 /* ArrayBindingPattern */:
-                    case 167 /* ObjectBindingPattern */:
-                    case 243 /* JsxOpeningElement */:
-                    case 242 /* JsxSelfClosingElement */:
-                    case 248 /* JsxExpression */:
-                    case 146 /* MethodSignature */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 142 /* Parameter */:
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 164 /* ParenthesizedType */:
-                    case 176 /* TaggedTemplateExpression */:
-                    case 184 /* AwaitExpression */:
-                    case 233 /* NamedImports */:
-                        return true;
-                }
-                return false;
-            }
-            /* @internal */
-            function nodeWillIndentChild(parent, child, indentByDefault) {
-                var childKind = child ? child.kind : 0 /* Unknown */;
-                switch (parent.kind) {
-                    case 204 /* DoStatement */:
-                    case 205 /* WhileStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 206 /* ForStatement */:
-                    case 203 /* IfStatement */:
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 147 /* MethodDeclaration */:
-                    case 180 /* ArrowFunction */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        return childKind !== 199 /* Block */;
-                    case 241 /* JsxElement */:
-                        return childKind !== 245 /* JsxClosingElement */;
-                }
-                // No explicit rule for given nodes so the result will follow the default value argument
-                return indentByDefault;
-            }
-            SmartIndenter.nodeWillIndentChild = nodeWillIndentChild;
-            /*
-            Function returns true when the parent node should indent the given child by an explicit rule
-            */
-            function shouldIndentChildNode(parent, child) {
-                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, /*indentByDefault*/ false);
-            }
-            SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
-        })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-/// <reference path="..\compiler\program.ts"/>
-/// <reference path='breakpoints.ts' />
-/// <reference path='outliningElementsCollector.ts' />
-/// <reference path='navigateTo.ts' />
-/// <reference path='navigationBar.ts' />
-/// <reference path='patternMatcher.ts' />
-/// <reference path='signatureHelp.ts' />
-/// <reference path='utilities.ts' />
-/// <reference path='jsTyping.ts' />
-/// <reference path='formatting\formatting.ts' />
-/// <reference path='formatting\smartIndenter.ts' />
-var ts;
-(function (ts) {
-    /** The version of the language service API */
-    ts.servicesVersion = "0.5";
-    var ScriptSnapshot;
-    (function (ScriptSnapshot) {
-        var StringScriptSnapshot = (function () {
-            function StringScriptSnapshot(text) {
-                this.text = text;
-            }
-            StringScriptSnapshot.prototype.getText = function (start, end) {
-                return this.text.substring(start, end);
-            };
-            StringScriptSnapshot.prototype.getLength = function () {
-                return this.text.length;
-            };
-            StringScriptSnapshot.prototype.getChangeRange = function (oldSnapshot) {
-                // Text-based snapshots do not support incremental parsing. Return undefined
-                // to signal that to the caller.
-                return undefined;
-            };
-            return StringScriptSnapshot;
-        }());
-        function fromString(text) {
-            return new StringScriptSnapshot(text);
-        }
-        ScriptSnapshot.fromString = fromString;
-    })(ScriptSnapshot = ts.ScriptSnapshot || (ts.ScriptSnapshot = {}));
-    var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ true);
-    var emptyArray = [];
-    var jsDocTagNames = [
-        "augments",
-        "author",
-        "argument",
-        "borrows",
-        "class",
-        "constant",
-        "constructor",
-        "constructs",
-        "default",
-        "deprecated",
-        "description",
-        "event",
-        "example",
-        "extends",
-        "field",
-        "fileOverview",
-        "function",
-        "ignore",
-        "inner",
-        "lends",
-        "link",
-        "memberOf",
-        "name",
-        "namespace",
-        "param",
-        "private",
-        "property",
-        "public",
-        "requires",
-        "returns",
-        "see",
-        "since",
-        "static",
-        "throws",
-        "type",
-        "version"
-    ];
-    var jsDocCompletionEntries;
-    function createNode(kind, pos, end, flags, parent) {
-        var node = new NodeObject(kind, pos, end);
-        node.flags = flags;
-        node.parent = parent;
-        return node;
-    }
-    var NodeObject = (function () {
-        function NodeObject(kind, pos, end) {
-            this.kind = kind;
-            this.pos = pos;
-            this.end = end;
-            this.flags = 0 /* None */;
-            this.parent = undefined;
-        }
-        NodeObject.prototype.getSourceFile = function () {
-            return ts.getSourceFileOfNode(this);
-        };
-        NodeObject.prototype.getStart = function (sourceFile) {
-            return ts.getTokenPosOfNode(this, sourceFile);
-        };
-        NodeObject.prototype.getFullStart = function () {
-            return this.pos;
-        };
-        NodeObject.prototype.getEnd = function () {
-            return this.end;
-        };
-        NodeObject.prototype.getWidth = function (sourceFile) {
-            return this.getEnd() - this.getStart(sourceFile);
-        };
-        NodeObject.prototype.getFullWidth = function () {
-            return this.end - this.pos;
-        };
-        NodeObject.prototype.getLeadingTriviaWidth = function (sourceFile) {
-            return this.getStart(sourceFile) - this.pos;
-        };
-        NodeObject.prototype.getFullText = function (sourceFile) {
-            return (sourceFile || this.getSourceFile()).text.substring(this.pos, this.end);
-        };
-        NodeObject.prototype.getText = function (sourceFile) {
-            return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
-        };
-        NodeObject.prototype.addSyntheticNodes = function (nodes, pos, end) {
-            scanner.setTextPos(pos);
-            while (pos < end) {
-                var token = scanner.scan();
-                var textPos = scanner.getTextPos();
-                nodes.push(createNode(token, pos, textPos, 0, this));
-                pos = textPos;
-            }
-            return pos;
-        };
-        NodeObject.prototype.createSyntaxList = function (nodes) {
-            var list = createNode(279 /* SyntaxList */, nodes.pos, nodes.end, 0, this);
-            list._children = [];
-            var pos = nodes.pos;
-            for (var _i = 0, nodes_7 = nodes; _i < nodes_7.length; _i++) {
-                var node = nodes_7[_i];
-                if (pos < node.pos) {
-                    pos = this.addSyntheticNodes(list._children, pos, node.pos);
-                }
-                list._children.push(node);
-                pos = node.end;
-            }
-            if (pos < nodes.end) {
-                this.addSyntheticNodes(list._children, pos, nodes.end);
-            }
-            return list;
-        };
-        NodeObject.prototype.createChildren = function (sourceFile) {
-            var _this = this;
-            var children;
-            if (this.kind >= 139 /* FirstNode */) {
-                scanner.setText((sourceFile || this.getSourceFile()).text);
-                children = [];
-                var pos_3 = this.pos;
-                var processNode = function (node) {
-                    if (pos_3 < node.pos) {
-                        pos_3 = _this.addSyntheticNodes(children, pos_3, node.pos);
-                    }
-                    children.push(node);
-                    pos_3 = node.end;
-                };
-                var processNodes = function (nodes) {
-                    if (pos_3 < nodes.pos) {
-                        pos_3 = _this.addSyntheticNodes(children, pos_3, nodes.pos);
-                    }
-                    children.push(_this.createSyntaxList(nodes));
-                    pos_3 = nodes.end;
-                };
-                ts.forEachChild(this, processNode, processNodes);
-                if (pos_3 < this.end) {
-                    this.addSyntheticNodes(children, pos_3, this.end);
-                }
-                scanner.setText(undefined);
-            }
-            this._children = children || emptyArray;
-        };
-        NodeObject.prototype.getChildCount = function (sourceFile) {
-            if (!this._children)
-                this.createChildren(sourceFile);
-            return this._children.length;
-        };
-        NodeObject.prototype.getChildAt = function (index, sourceFile) {
-            if (!this._children)
-                this.createChildren(sourceFile);
-            return this._children[index];
-        };
-        NodeObject.prototype.getChildren = function (sourceFile) {
-            if (!this._children)
-                this.createChildren(sourceFile);
-            return this._children;
-        };
-        NodeObject.prototype.getFirstToken = function (sourceFile) {
-            var children = this.getChildren(sourceFile);
-            if (!children.length) {
-                return undefined;
-            }
-            var child = children[0];
-            return child.kind < 139 /* FirstNode */ ? child : child.getFirstToken(sourceFile);
-        };
-        NodeObject.prototype.getLastToken = function (sourceFile) {
-            var children = this.getChildren(sourceFile);
-            var child = ts.lastOrUndefined(children);
-            if (!child) {
-                return undefined;
-            }
-            return child.kind < 139 /* FirstNode */ ? child : child.getLastToken(sourceFile);
-        };
-        return NodeObject;
-    }());
-    var SymbolObject = (function () {
-        function SymbolObject(flags, name) {
-            this.flags = flags;
-            this.name = name;
-        }
-        SymbolObject.prototype.getFlags = function () {
-            return this.flags;
-        };
-        SymbolObject.prototype.getName = function () {
-            return this.name;
-        };
-        SymbolObject.prototype.getDeclarations = function () {
-            return this.declarations;
-        };
-        SymbolObject.prototype.getDocumentationComment = function () {
-            if (this.documentationComment === undefined) {
-                this.documentationComment = getJsDocCommentsFromDeclarations(this.declarations, this.name, !(this.flags & 4 /* Property */));
-            }
-            return this.documentationComment;
-        };
-        return SymbolObject;
-    }());
-    function getJsDocCommentsFromDeclarations(declarations, name, canUseParsedParamTagComments) {
-        var documentationComment = [];
-        var docComments = getJsDocCommentsSeparatedByNewLines();
-        ts.forEach(docComments, function (docComment) {
-            if (documentationComment.length) {
-                documentationComment.push(ts.lineBreakPart());
-            }
-            documentationComment.push(docComment);
-        });
-        return documentationComment;
-        function getJsDocCommentsSeparatedByNewLines() {
-            var paramTag = "@param";
-            var jsDocCommentParts = [];
-            ts.forEach(declarations, function (declaration, indexOfDeclaration) {
-                // Make sure we are collecting doc comment from declaration once,
-                // In case of union property there might be same declaration multiple times
-                // which only varies in type parameter
-                // Eg. const a: Array<string> | Array<number>; a.length
-                // The property length will have two declarations of property length coming
-                // from Array<T> - Array<string> and Array<number>
-                if (ts.indexOf(declarations, declaration) === indexOfDeclaration) {
-                    var sourceFileOfDeclaration_1 = ts.getSourceFileOfNode(declaration);
-                    // If it is parameter - try and get the jsDoc comment with @param tag from function declaration's jsDoc comments
-                    if (canUseParsedParamTagComments && declaration.kind === 142 /* Parameter */) {
-                        ts.forEach(getJsDocCommentTextRange(declaration.parent, sourceFileOfDeclaration_1), function (jsDocCommentTextRange) {
-                            var cleanedParamJsDocComment = getCleanedParamJsDocComment(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration_1);
-                            if (cleanedParamJsDocComment) {
-                                ts.addRange(jsDocCommentParts, cleanedParamJsDocComment);
-                            }
-                        });
-                    }
-                    // If this is left side of dotted module declaration, there is no doc comments associated with this node
-                    if (declaration.kind === 225 /* ModuleDeclaration */ && declaration.body.kind === 225 /* ModuleDeclaration */) {
-                        return;
-                    }
-                    // If this is dotted module name, get the doc comments from the parent
-                    while (declaration.kind === 225 /* ModuleDeclaration */ && declaration.parent.kind === 225 /* ModuleDeclaration */) {
-                        declaration = declaration.parent;
-                    }
-                    // Get the cleaned js doc comment text from the declaration
-                    ts.forEach(getJsDocCommentTextRange(declaration.kind === 218 /* VariableDeclaration */ ? declaration.parent.parent : declaration, sourceFileOfDeclaration_1), function (jsDocCommentTextRange) {
-                        var cleanedJsDocComment = getCleanedJsDocComment(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration_1);
-                        if (cleanedJsDocComment) {
-                            ts.addRange(jsDocCommentParts, cleanedJsDocComment);
-                        }
-                    });
-                }
-            });
-            return jsDocCommentParts;
-            function getJsDocCommentTextRange(node, sourceFile) {
-                return ts.map(ts.getJsDocComments(node, sourceFile), function (jsDocComment) {
-                    return {
-                        pos: jsDocComment.pos + "/*".length,
-                        end: jsDocComment.end - "*/".length // Trim off comment end indicator
-                    };
-                });
-            }
-            function consumeWhiteSpacesOnTheLine(pos, end, sourceFile, maxSpacesToRemove) {
-                if (maxSpacesToRemove !== undefined) {
-                    end = Math.min(end, pos + maxSpacesToRemove);
-                }
-                for (; pos < end; pos++) {
-                    var ch = sourceFile.text.charCodeAt(pos);
-                    if (!ts.isWhiteSpace(ch) || ts.isLineBreak(ch)) {
-                        // Either found lineBreak or non whiteSpace
-                        return pos;
-                    }
-                }
-                return end;
-            }
-            function consumeLineBreaks(pos, end, sourceFile) {
-                while (pos < end && ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
-                    pos++;
-                }
-                return pos;
-            }
-            function isName(pos, end, sourceFile, name) {
-                return pos + name.length < end &&
-                    sourceFile.text.substr(pos, name.length) === name &&
-                    (ts.isWhiteSpace(sourceFile.text.charCodeAt(pos + name.length)) ||
-                        ts.isLineBreak(sourceFile.text.charCodeAt(pos + name.length)));
-            }
-            function isParamTag(pos, end, sourceFile) {
-                // If it is @param tag
-                return isName(pos, end, sourceFile, paramTag);
-            }
-            function pushDocCommentLineText(docComments, text, blankLineCount) {
-                // Add the empty lines in between texts
-                while (blankLineCount) {
-                    blankLineCount--;
-                    docComments.push(ts.textPart(""));
-                }
-                docComments.push(ts.textPart(text));
-            }
-            function getCleanedJsDocComment(pos, end, sourceFile) {
-                var spacesToRemoveAfterAsterisk;
-                var docComments = [];
-                var blankLineCount = 0;
-                var isInParamTag = false;
-                while (pos < end) {
-                    var docCommentTextOfLine = "";
-                    // First consume leading white space
-                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile);
-                    // If the comment starts with '*' consume the spaces on this line
-                    if (pos < end && sourceFile.text.charCodeAt(pos) === 42 /* asterisk */) {
-                        var lineStartPos = pos + 1;
-                        pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, spacesToRemoveAfterAsterisk);
-                        // Set the spaces to remove after asterisk as margin if not already set
-                        if (spacesToRemoveAfterAsterisk === undefined && pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
-                            spacesToRemoveAfterAsterisk = pos - lineStartPos;
-                        }
-                    }
-                    else if (spacesToRemoveAfterAsterisk === undefined) {
-                        spacesToRemoveAfterAsterisk = 0;
-                    }
-                    // Analyze text on this line
-                    while (pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
-                        var ch = sourceFile.text.charAt(pos);
-                        if (ch === "@") {
-                            // If it is @param tag
-                            if (isParamTag(pos, end, sourceFile)) {
-                                isInParamTag = true;
-                                pos += paramTag.length;
-                                continue;
-                            }
-                            else {
-                                isInParamTag = false;
-                            }
-                        }
-                        // Add the ch to doc text if we arent in param tag
-                        if (!isInParamTag) {
-                            docCommentTextOfLine += ch;
-                        }
-                        // Scan next character
-                        pos++;
-                    }
-                    // Continue with next line
-                    pos = consumeLineBreaks(pos, end, sourceFile);
-                    if (docCommentTextOfLine) {
-                        pushDocCommentLineText(docComments, docCommentTextOfLine, blankLineCount);
-                        blankLineCount = 0;
-                    }
-                    else if (!isInParamTag && docComments.length) {
-                        // This is blank line when there is text already parsed
-                        blankLineCount++;
-                    }
-                }
-                return docComments;
-            }
-            function getCleanedParamJsDocComment(pos, end, sourceFile) {
-                var paramHelpStringMargin;
-                var paramDocComments = [];
-                while (pos < end) {
-                    if (isParamTag(pos, end, sourceFile)) {
-                        var blankLineCount = 0;
-                        var recordedParamTag = false;
-                        // Consume leading spaces
-                        pos = consumeWhiteSpaces(pos + paramTag.length);
-                        if (pos >= end) {
-                            break;
-                        }
-                        // Ignore type expression
-                        if (sourceFile.text.charCodeAt(pos) === 123 /* openBrace */) {
-                            pos++;
-                            for (var curlies = 1; pos < end; pos++) {
-                                var charCode = sourceFile.text.charCodeAt(pos);
-                                // { character means we need to find another } to match the found one
-                                if (charCode === 123 /* openBrace */) {
-                                    curlies++;
-                                    continue;
-                                }
-                                // } char
-                                if (charCode === 125 /* closeBrace */) {
-                                    curlies--;
-                                    if (curlies === 0) {
-                                        // We do not have any more } to match the type expression is ignored completely
-                                        pos++;
-                                        break;
-                                    }
-                                    else {
-                                        // there are more { to be matched with }
-                                        continue;
-                                    }
-                                }
-                                // Found start of another tag
-                                if (charCode === 64 /* at */) {
-                                    break;
-                                }
-                            }
-                            // Consume white spaces
-                            pos = consumeWhiteSpaces(pos);
-                            if (pos >= end) {
-                                break;
-                            }
-                        }
-                        // Parameter name
-                        if (isName(pos, end, sourceFile, name)) {
-                            // Found the parameter we are looking for consume white spaces
-                            pos = consumeWhiteSpaces(pos + name.length);
-                            if (pos >= end) {
-                                break;
-                            }
-                            var paramHelpString = "";
-                            var firstLineParamHelpStringPos = pos;
-                            while (pos < end) {
-                                var ch = sourceFile.text.charCodeAt(pos);
-                                // at line break, set this comment line text and go to next line
-                                if (ts.isLineBreak(ch)) {
-                                    if (paramHelpString) {
-                                        pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
-                                        paramHelpString = "";
-                                        blankLineCount = 0;
-                                        recordedParamTag = true;
-                                    }
-                                    else if (recordedParamTag) {
-                                        blankLineCount++;
-                                    }
-                                    // Get the pos after cleaning start of the line
-                                    setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos);
-                                    continue;
-                                }
-                                // Done scanning param help string - next tag found
-                                if (ch === 64 /* at */) {
-                                    break;
-                                }
-                                paramHelpString += sourceFile.text.charAt(pos);
-                                // Go to next character
-                                pos++;
-                            }
-                            // If there is param help text, add it top the doc comments
-                            if (paramHelpString) {
-                                pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
-                            }
-                            paramHelpStringMargin = undefined;
-                        }
-                        // If this is the start of another tag, continue with the loop in search of param tag with symbol name
-                        if (sourceFile.text.charCodeAt(pos) === 64 /* at */) {
-                            continue;
-                        }
-                    }
-                    // Next character
-                    pos++;
-                }
-                return paramDocComments;
-                function consumeWhiteSpaces(pos) {
-                    while (pos < end && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
-                        pos++;
-                    }
-                    return pos;
-                }
-                function setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos) {
-                    // Get the pos after consuming line breaks
-                    pos = consumeLineBreaks(pos, end, sourceFile);
-                    if (pos >= end) {
-                        return;
-                    }
-                    if (paramHelpStringMargin === undefined) {
-                        paramHelpStringMargin = sourceFile.getLineAndCharacterOfPosition(firstLineParamHelpStringPos).character;
-                    }
-                    // Now consume white spaces max
-                    var startOfLinePos = pos;
-                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile, paramHelpStringMargin);
-                    if (pos >= end) {
-                        return;
-                    }
-                    var consumedSpaces = pos - startOfLinePos;
-                    if (consumedSpaces < paramHelpStringMargin) {
-                        var ch = sourceFile.text.charCodeAt(pos);
-                        if (ch === 42 /* asterisk */) {
-                            // Consume more spaces after asterisk
-                            pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, paramHelpStringMargin - consumedSpaces - 1);
-                        }
-                    }
-                }
-            }
-        }
-    }
-    var TypeObject = (function () {
-        function TypeObject(checker, flags) {
-            this.checker = checker;
-            this.flags = flags;
-        }
-        TypeObject.prototype.getFlags = function () {
-            return this.flags;
-        };
-        TypeObject.prototype.getSymbol = function () {
-            return this.symbol;
-        };
-        TypeObject.prototype.getProperties = function () {
-            return this.checker.getPropertiesOfType(this);
-        };
-        TypeObject.prototype.getProperty = function (propertyName) {
-            return this.checker.getPropertyOfType(this, propertyName);
-        };
-        TypeObject.prototype.getApparentProperties = function () {
-            return this.checker.getAugmentedPropertiesOfType(this);
-        };
-        TypeObject.prototype.getCallSignatures = function () {
-            return this.checker.getSignaturesOfType(this, 0 /* Call */);
-        };
-        TypeObject.prototype.getConstructSignatures = function () {
-            return this.checker.getSignaturesOfType(this, 1 /* Construct */);
-        };
-        TypeObject.prototype.getStringIndexType = function () {
-            return this.checker.getIndexTypeOfType(this, 0 /* String */);
-        };
-        TypeObject.prototype.getNumberIndexType = function () {
-            return this.checker.getIndexTypeOfType(this, 1 /* Number */);
-        };
-        TypeObject.prototype.getBaseTypes = function () {
-            return this.flags & (1024 /* Class */ | 2048 /* Interface */)
-                ? this.checker.getBaseTypes(this)
-                : undefined;
-        };
-        TypeObject.prototype.getNonNullableType = function () {
-            return this.checker.getNonNullableType(this);
-        };
-        return TypeObject;
-    }());
-    var SignatureObject = (function () {
-        function SignatureObject(checker) {
-            this.checker = checker;
-        }
-        SignatureObject.prototype.getDeclaration = function () {
-            return this.declaration;
-        };
-        SignatureObject.prototype.getTypeParameters = function () {
-            return this.typeParameters;
-        };
-        SignatureObject.prototype.getParameters = function () {
-            return this.parameters;
-        };
-        SignatureObject.prototype.getReturnType = function () {
-            return this.checker.getReturnTypeOfSignature(this);
-        };
-        SignatureObject.prototype.getDocumentationComment = function () {
-            if (this.documentationComment === undefined) {
-                this.documentationComment = this.declaration ? getJsDocCommentsFromDeclarations([this.declaration], 
-                /*name*/ undefined, 
-                /*canUseParsedParamTagComments*/ false) : [];
-            }
-            return this.documentationComment;
-        };
-        return SignatureObject;
-    }());
-    var SourceFileObject = (function (_super) {
-        __extends(SourceFileObject, _super);
-        function SourceFileObject(kind, pos, end) {
-            _super.call(this, kind, pos, end);
-        }
-        SourceFileObject.prototype.update = function (newText, textChangeRange) {
-            return ts.updateSourceFile(this, newText, textChangeRange);
-        };
-        SourceFileObject.prototype.getLineAndCharacterOfPosition = function (position) {
-            return ts.getLineAndCharacterOfPosition(this, position);
-        };
-        SourceFileObject.prototype.getLineStarts = function () {
-            return ts.getLineStarts(this);
-        };
-        SourceFileObject.prototype.getPositionOfLineAndCharacter = function (line, character) {
-            return ts.getPositionOfLineAndCharacter(this, line, character);
-        };
-        SourceFileObject.prototype.getNamedDeclarations = function () {
-            if (!this.namedDeclarations) {
-                this.namedDeclarations = this.computeNamedDeclarations();
-            }
-            return this.namedDeclarations;
-        };
-        SourceFileObject.prototype.computeNamedDeclarations = function () {
-            var result = {};
-            ts.forEachChild(this, visit);
-            return result;
-            function addDeclaration(declaration) {
-                var name = getDeclarationName(declaration);
-                if (name) {
-                    var declarations = getDeclarations(name);
-                    declarations.push(declaration);
-                }
-            }
-            function getDeclarations(name) {
-                return ts.getProperty(result, name) || (result[name] = []);
-            }
-            function getDeclarationName(declaration) {
-                if (declaration.name) {
-                    var result_2 = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (result_2 !== undefined) {
-                        return result_2;
-                    }
-                    if (declaration.name.kind === 140 /* ComputedPropertyName */) {
-                        var expr = declaration.name.expression;
-                        if (expr.kind === 172 /* PropertyAccessExpression */) {
-                            return expr.name.text;
-                        }
-                        return getTextOfIdentifierOrLiteral(expr);
-                    }
-                }
-                return undefined;
-            }
-            function getTextOfIdentifierOrLiteral(node) {
-                if (node) {
-                    if (node.kind === 69 /* Identifier */ ||
-                        node.kind === 9 /* StringLiteral */ ||
-                        node.kind === 8 /* NumericLiteral */) {
-                        return node.text;
-                    }
-                }
-                return undefined;
-            }
-            function visit(node) {
-                switch (node.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        var functionDeclaration = node;
-                        var declarationName = getDeclarationName(functionDeclaration);
-                        if (declarationName) {
-                            var declarations = getDeclarations(declarationName);
-                            var lastDeclaration = ts.lastOrUndefined(declarations);
-                            // Check whether this declaration belongs to an "overload group".
-                            if (lastDeclaration && functionDeclaration.parent === lastDeclaration.parent && functionDeclaration.symbol === lastDeclaration.symbol) {
-                                // Overwrite the last declaration if it was an overload
-                                // and this one is an implementation.
-                                if (functionDeclaration.body && !lastDeclaration.body) {
-                                    declarations[declarations.length - 1] = functionDeclaration;
-                                }
-                            }
-                            else {
-                                declarations.push(functionDeclaration);
-                            }
-                            ts.forEachChild(node, visit);
-                        }
-                        break;
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 225 /* ModuleDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 238 /* ExportSpecifier */:
-                    case 234 /* ImportSpecifier */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 231 /* ImportClause */:
-                    case 232 /* NamespaceImport */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 159 /* TypeLiteral */:
-                        addDeclaration(node);
-                        ts.forEachChild(node, visit);
-                        break;
-                    case 142 /* Parameter */:
-                        // Only consider parameter properties
-                        if (!(node.flags & 92 /* ParameterPropertyModifier */)) {
-                            break;
-                        }
-                    // fall through
-                    case 218 /* VariableDeclaration */:
-                    case 169 /* BindingElement */: {
-                        var decl = node;
-                        if (ts.isBindingPattern(decl.name)) {
-                            ts.forEachChild(decl.name, visit);
-                            break;
-                        }
-                        if (decl.initializer)
-                            visit(decl.initializer);
-                    }
-                    case 255 /* EnumMember */:
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                        addDeclaration(node);
-                        break;
-                    case 236 /* ExportDeclaration */:
-                        // Handle named exports case e.g.:
-                        //    export {a, b as B} from "mod";
-                        if (node.exportClause) {
-                            ts.forEach(node.exportClause.elements, visit);
-                        }
-                        break;
-                    case 230 /* ImportDeclaration */:
-                        var importClause = node.importClause;
-                        if (importClause) {
-                            // Handle default import case e.g.:
-                            //    import d from "mod";
-                            if (importClause.name) {
-                                addDeclaration(importClause);
-                            }
-                            // Handle named bindings in imports e.g.:
-                            //    import * as NS from "mod";
-                            //    import {a, b as B} from "mod";
-                            if (importClause.namedBindings) {
-                                if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                                    addDeclaration(importClause.namedBindings);
-                                }
-                                else {
-                                    ts.forEach(importClause.namedBindings.elements, visit);
-                                }
-                            }
-                        }
-                        break;
-                    default:
-                        ts.forEachChild(node, visit);
-                }
-            }
-        };
-        return SourceFileObject;
-    }(NodeObject));
-    var TextChange = (function () {
-        function TextChange() {
-        }
-        return TextChange;
-    }());
-    ts.TextChange = TextChange;
-    var HighlightSpanKind;
-    (function (HighlightSpanKind) {
-        HighlightSpanKind.none = "none";
-        HighlightSpanKind.definition = "definition";
-        HighlightSpanKind.reference = "reference";
-        HighlightSpanKind.writtenReference = "writtenReference";
-    })(HighlightSpanKind = ts.HighlightSpanKind || (ts.HighlightSpanKind = {}));
-    (function (IndentStyle) {
-        IndentStyle[IndentStyle["None"] = 0] = "None";
-        IndentStyle[IndentStyle["Block"] = 1] = "Block";
-        IndentStyle[IndentStyle["Smart"] = 2] = "Smart";
-    })(ts.IndentStyle || (ts.IndentStyle = {}));
-    var IndentStyle = ts.IndentStyle;
-    (function (SymbolDisplayPartKind) {
-        SymbolDisplayPartKind[SymbolDisplayPartKind["aliasName"] = 0] = "aliasName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["className"] = 1] = "className";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["enumName"] = 2] = "enumName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["fieldName"] = 3] = "fieldName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["interfaceName"] = 4] = "interfaceName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["keyword"] = 5] = "keyword";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["lineBreak"] = 6] = "lineBreak";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["numericLiteral"] = 7] = "numericLiteral";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["stringLiteral"] = 8] = "stringLiteral";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["localName"] = 9] = "localName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["methodName"] = 10] = "methodName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["moduleName"] = 11] = "moduleName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["operator"] = 12] = "operator";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["parameterName"] = 13] = "parameterName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["propertyName"] = 14] = "propertyName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["punctuation"] = 15] = "punctuation";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["space"] = 16] = "space";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["text"] = 17] = "text";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["typeParameterName"] = 18] = "typeParameterName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["enumMemberName"] = 19] = "enumMemberName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["functionName"] = 20] = "functionName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["regularExpressionLiteral"] = 21] = "regularExpressionLiteral";
-    })(ts.SymbolDisplayPartKind || (ts.SymbolDisplayPartKind = {}));
-    var SymbolDisplayPartKind = ts.SymbolDisplayPartKind;
-    (function (OutputFileType) {
-        OutputFileType[OutputFileType["JavaScript"] = 0] = "JavaScript";
-        OutputFileType[OutputFileType["SourceMap"] = 1] = "SourceMap";
-        OutputFileType[OutputFileType["Declaration"] = 2] = "Declaration";
-    })(ts.OutputFileType || (ts.OutputFileType = {}));
-    var OutputFileType = ts.OutputFileType;
-    (function (EndOfLineState) {
-        EndOfLineState[EndOfLineState["None"] = 0] = "None";
-        EndOfLineState[EndOfLineState["InMultiLineCommentTrivia"] = 1] = "InMultiLineCommentTrivia";
-        EndOfLineState[EndOfLineState["InSingleQuoteStringLiteral"] = 2] = "InSingleQuoteStringLiteral";
-        EndOfLineState[EndOfLineState["InDoubleQuoteStringLiteral"] = 3] = "InDoubleQuoteStringLiteral";
-        EndOfLineState[EndOfLineState["InTemplateHeadOrNoSubstitutionTemplate"] = 4] = "InTemplateHeadOrNoSubstitutionTemplate";
-        EndOfLineState[EndOfLineState["InTemplateMiddleOrTail"] = 5] = "InTemplateMiddleOrTail";
-        EndOfLineState[EndOfLineState["InTemplateSubstitutionPosition"] = 6] = "InTemplateSubstitutionPosition";
-    })(ts.EndOfLineState || (ts.EndOfLineState = {}));
-    var EndOfLineState = ts.EndOfLineState;
-    (function (TokenClass) {
-        TokenClass[TokenClass["Punctuation"] = 0] = "Punctuation";
-        TokenClass[TokenClass["Keyword"] = 1] = "Keyword";
-        TokenClass[TokenClass["Operator"] = 2] = "Operator";
-        TokenClass[TokenClass["Comment"] = 3] = "Comment";
-        TokenClass[TokenClass["Whitespace"] = 4] = "Whitespace";
-        TokenClass[TokenClass["Identifier"] = 5] = "Identifier";
-        TokenClass[TokenClass["NumberLiteral"] = 6] = "NumberLiteral";
-        TokenClass[TokenClass["StringLiteral"] = 7] = "StringLiteral";
-        TokenClass[TokenClass["RegExpLiteral"] = 8] = "RegExpLiteral";
-    })(ts.TokenClass || (ts.TokenClass = {}));
-    var TokenClass = ts.TokenClass;
-    // TODO: move these to enums
-    var ScriptElementKind;
-    (function (ScriptElementKind) {
-        ScriptElementKind.unknown = "";
-        ScriptElementKind.warning = "warning";
-        /** predefined type (void) or keyword (class) */
-        ScriptElementKind.keyword = "keyword";
-        /** top level script node */
-        ScriptElementKind.scriptElement = "script";
-        /** module foo {} */
-        ScriptElementKind.moduleElement = "module";
-        /** class X {} */
-        ScriptElementKind.classElement = "class";
-        /** var x = class X {} */
-        ScriptElementKind.localClassElement = "local class";
-        /** interface Y {} */
-        ScriptElementKind.interfaceElement = "interface";
-        /** type T = ... */
-        ScriptElementKind.typeElement = "type";
-        /** enum E */
-        ScriptElementKind.enumElement = "enum";
-        /**
-         * Inside module and script only
-         * const v = ..
-         */
-        ScriptElementKind.variableElement = "var";
-        /** Inside function */
-        ScriptElementKind.localVariableElement = "local var";
-        /**
-         * Inside module and script only
-         * function f() { }
-         */
-        ScriptElementKind.functionElement = "function";
-        /** Inside function */
-        ScriptElementKind.localFunctionElement = "local function";
-        /** class X { [public|private]* foo() {} } */
-        ScriptElementKind.memberFunctionElement = "method";
-        /** class X { [public|private]* [get|set] foo:number; } */
-        ScriptElementKind.memberGetAccessorElement = "getter";
-        ScriptElementKind.memberSetAccessorElement = "setter";
-        /**
-         * class X { [public|private]* foo:number; }
-         * interface Y { foo:number; }
-         */
-        ScriptElementKind.memberVariableElement = "property";
-        /** class X { constructor() { } } */
-        ScriptElementKind.constructorImplementationElement = "constructor";
-        /** interface Y { ():number; } */
-        ScriptElementKind.callSignatureElement = "call";
-        /** interface Y { []:number; } */
-        ScriptElementKind.indexSignatureElement = "index";
-        /** interface Y { new():Y; } */
-        ScriptElementKind.constructSignatureElement = "construct";
-        /** function foo(*Y*: string) */
-        ScriptElementKind.parameterElement = "parameter";
-        ScriptElementKind.typeParameterElement = "type parameter";
-        ScriptElementKind.primitiveType = "primitive type";
-        ScriptElementKind.label = "label";
-        ScriptElementKind.alias = "alias";
-        ScriptElementKind.constElement = "const";
-        ScriptElementKind.letElement = "let";
-    })(ScriptElementKind = ts.ScriptElementKind || (ts.ScriptElementKind = {}));
-    var ScriptElementKindModifier;
-    (function (ScriptElementKindModifier) {
-        ScriptElementKindModifier.none = "";
-        ScriptElementKindModifier.publicMemberModifier = "public";
-        ScriptElementKindModifier.privateMemberModifier = "private";
-        ScriptElementKindModifier.protectedMemberModifier = "protected";
-        ScriptElementKindModifier.exportedModifier = "export";
-        ScriptElementKindModifier.ambientModifier = "declare";
-        ScriptElementKindModifier.staticModifier = "static";
-        ScriptElementKindModifier.abstractModifier = "abstract";
-    })(ScriptElementKindModifier = ts.ScriptElementKindModifier || (ts.ScriptElementKindModifier = {}));
-    var ClassificationTypeNames = (function () {
-        function ClassificationTypeNames() {
-        }
-        ClassificationTypeNames.comment = "comment";
-        ClassificationTypeNames.identifier = "identifier";
-        ClassificationTypeNames.keyword = "keyword";
-        ClassificationTypeNames.numericLiteral = "number";
-        ClassificationTypeNames.operator = "operator";
-        ClassificationTypeNames.stringLiteral = "string";
-        ClassificationTypeNames.whiteSpace = "whitespace";
-        ClassificationTypeNames.text = "text";
-        ClassificationTypeNames.punctuation = "punctuation";
-        ClassificationTypeNames.className = "class name";
-        ClassificationTypeNames.enumName = "enum name";
-        ClassificationTypeNames.interfaceName = "interface name";
-        ClassificationTypeNames.moduleName = "module name";
-        ClassificationTypeNames.typeParameterName = "type parameter name";
-        ClassificationTypeNames.typeAliasName = "type alias name";
-        ClassificationTypeNames.parameterName = "parameter name";
-        ClassificationTypeNames.docCommentTagName = "doc comment tag name";
-        ClassificationTypeNames.jsxOpenTagName = "jsx open tag name";
-        ClassificationTypeNames.jsxCloseTagName = "jsx close tag name";
-        ClassificationTypeNames.jsxSelfClosingTagName = "jsx self closing tag name";
-        ClassificationTypeNames.jsxAttribute = "jsx attribute";
-        ClassificationTypeNames.jsxText = "jsx text";
-        ClassificationTypeNames.jsxAttributeStringLiteralValue = "jsx attribute string literal value";
-        return ClassificationTypeNames;
-    }());
-    ts.ClassificationTypeNames = ClassificationTypeNames;
-    (function (ClassificationType) {
-        ClassificationType[ClassificationType["comment"] = 1] = "comment";
-        ClassificationType[ClassificationType["identifier"] = 2] = "identifier";
-        ClassificationType[ClassificationType["keyword"] = 3] = "keyword";
-        ClassificationType[ClassificationType["numericLiteral"] = 4] = "numericLiteral";
-        ClassificationType[ClassificationType["operator"] = 5] = "operator";
-        ClassificationType[ClassificationType["stringLiteral"] = 6] = "stringLiteral";
-        ClassificationType[ClassificationType["regularExpressionLiteral"] = 7] = "regularExpressionLiteral";
-        ClassificationType[ClassificationType["whiteSpace"] = 8] = "whiteSpace";
-        ClassificationType[ClassificationType["text"] = 9] = "text";
-        ClassificationType[ClassificationType["punctuation"] = 10] = "punctuation";
-        ClassificationType[ClassificationType["className"] = 11] = "className";
-        ClassificationType[ClassificationType["enumName"] = 12] = "enumName";
-        ClassificationType[ClassificationType["interfaceName"] = 13] = "interfaceName";
-        ClassificationType[ClassificationType["moduleName"] = 14] = "moduleName";
-        ClassificationType[ClassificationType["typeParameterName"] = 15] = "typeParameterName";
-        ClassificationType[ClassificationType["typeAliasName"] = 16] = "typeAliasName";
-        ClassificationType[ClassificationType["parameterName"] = 17] = "parameterName";
-        ClassificationType[ClassificationType["docCommentTagName"] = 18] = "docCommentTagName";
-        ClassificationType[ClassificationType["jsxOpenTagName"] = 19] = "jsxOpenTagName";
-        ClassificationType[ClassificationType["jsxCloseTagName"] = 20] = "jsxCloseTagName";
-        ClassificationType[ClassificationType["jsxSelfClosingTagName"] = 21] = "jsxSelfClosingTagName";
-        ClassificationType[ClassificationType["jsxAttribute"] = 22] = "jsxAttribute";
-        ClassificationType[ClassificationType["jsxText"] = 23] = "jsxText";
-        ClassificationType[ClassificationType["jsxAttributeStringLiteralValue"] = 24] = "jsxAttributeStringLiteralValue";
-    })(ts.ClassificationType || (ts.ClassificationType = {}));
-    var ClassificationType = ts.ClassificationType;
-    function displayPartsToString(displayParts) {
-        if (displayParts) {
-            return ts.map(displayParts, function (displayPart) { return displayPart.text; }).join("");
-        }
-        return "";
-    }
-    ts.displayPartsToString = displayPartsToString;
-    function isLocalVariableOrFunction(symbol) {
-        if (symbol.parent) {
-            return false; // This is exported symbol
-        }
-        return ts.forEach(symbol.declarations, function (declaration) {
-            // Function expressions are local
-            if (declaration.kind === 179 /* FunctionExpression */) {
-                return true;
-            }
-            if (declaration.kind !== 218 /* VariableDeclaration */ && declaration.kind !== 220 /* FunctionDeclaration */) {
-                return false;
-            }
-            // If the parent is not sourceFile or module block it is local variable
-            for (var parent_15 = declaration.parent; !ts.isFunctionBlock(parent_15); parent_15 = parent_15.parent) {
-                // Reached source file or module block
-                if (parent_15.kind === 256 /* SourceFile */ || parent_15.kind === 226 /* ModuleBlock */) {
-                    return false;
-                }
-            }
-            // parent is in function block
-            return true;
-        });
-    }
-    function getDefaultCompilerOptions() {
-        // Always default to "ScriptTarget.ES5" for the language service
-        return {
-            target: 1 /* ES5 */,
-            jsx: 1 /* Preserve */
-        };
-    }
-    ts.getDefaultCompilerOptions = getDefaultCompilerOptions;
-    // Cache host information about scrip Should be refreshed
-    // at each language service public entry point, since we don't know when
-    // set of scripts handled by the host changes.
-    var HostCache = (function () {
-        function HostCache(host, getCanonicalFileName) {
-            this.host = host;
-            this.getCanonicalFileName = getCanonicalFileName;
-            // script id => script index
-            this.currentDirectory = host.getCurrentDirectory();
-            this.fileNameToEntry = ts.createFileMap();
-            // Initialize the list with the root file names
-            var rootFileNames = host.getScriptFileNames();
-            for (var _i = 0, rootFileNames_1 = rootFileNames; _i < rootFileNames_1.length; _i++) {
-                var fileName = rootFileNames_1[_i];
-                this.createEntry(fileName, ts.toPath(fileName, this.currentDirectory, getCanonicalFileName));
-            }
-            // store the compilation settings
-            this._compilationSettings = host.getCompilationSettings() || getDefaultCompilerOptions();
-        }
-        HostCache.prototype.compilationSettings = function () {
-            return this._compilationSettings;
-        };
-        HostCache.prototype.createEntry = function (fileName, path) {
-            var entry;
-            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
-            if (scriptSnapshot) {
-                entry = {
-                    hostFileName: fileName,
-                    version: this.host.getScriptVersion(fileName),
-                    scriptSnapshot: scriptSnapshot,
-                    scriptKind: ts.getScriptKind(fileName, this.host)
-                };
-            }
-            this.fileNameToEntry.set(path, entry);
-            return entry;
-        };
-        HostCache.prototype.getEntry = function (path) {
-            return this.fileNameToEntry.get(path);
-        };
-        HostCache.prototype.contains = function (path) {
-            return this.fileNameToEntry.contains(path);
-        };
-        HostCache.prototype.getOrCreateEntry = function (fileName) {
-            var path = ts.toPath(fileName, this.currentDirectory, this.getCanonicalFileName);
-            return this.getOrCreateEntryByPath(fileName, path);
-        };
-        HostCache.prototype.getOrCreateEntryByPath = function (fileName, path) {
-            return this.contains(path)
-                ? this.getEntry(path)
-                : this.createEntry(fileName, path);
-        };
-        HostCache.prototype.getRootFileNames = function () {
-            var fileNames = [];
-            this.fileNameToEntry.forEachValue(function (path, value) {
-                if (value) {
-                    fileNames.push(value.hostFileName);
-                }
-            });
-            return fileNames;
-        };
-        HostCache.prototype.getVersion = function (path) {
-            var file = this.getEntry(path);
-            return file && file.version;
-        };
-        HostCache.prototype.getScriptSnapshot = function (path) {
-            var file = this.getEntry(path);
-            return file && file.scriptSnapshot;
-        };
-        return HostCache;
-    }());
-    var SyntaxTreeCache = (function () {
-        function SyntaxTreeCache(host) {
-            this.host = host;
-        }
-        SyntaxTreeCache.prototype.getCurrentSourceFile = function (fileName) {
-            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
-            if (!scriptSnapshot) {
-                // The host does not know about this file.
-                throw new Error("Could not find file: '" + fileName + "'.");
-            }
-            var scriptKind = ts.getScriptKind(fileName, this.host);
-            var version = this.host.getScriptVersion(fileName);
-            var sourceFile;
-            if (this.currentFileName !== fileName) {
-                // This is a new file, just parse it
-                sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, 2 /* Latest */, version, /*setNodeParents*/ true, scriptKind);
-            }
-            else if (this.currentFileVersion !== version) {
-                // This is the same file, just a newer version. Incrementally parse the file.
-                var editRange = scriptSnapshot.getChangeRange(this.currentFileScriptSnapshot);
-                sourceFile = updateLanguageServiceSourceFile(this.currentSourceFile, scriptSnapshot, version, editRange);
-            }
-            if (sourceFile) {
-                // All done, ensure state is up to date
-                this.currentFileVersion = version;
-                this.currentFileName = fileName;
-                this.currentFileScriptSnapshot = scriptSnapshot;
-                this.currentSourceFile = sourceFile;
-            }
-            return this.currentSourceFile;
-        };
-        return SyntaxTreeCache;
-    }());
-    function setSourceFileFields(sourceFile, scriptSnapshot, version) {
-        sourceFile.version = version;
-        sourceFile.scriptSnapshot = scriptSnapshot;
-    }
-    /*
-     * This function will compile source text from 'input' argument using specified compiler options.
-     * If not options are provided - it will use a set of default compiler options.
-     * Extra compiler options that will unconditionally be used by this function are:
-     * - isolatedModules = true
-     * - allowNonTsExtensions = true
-     * - noLib = true
-     * - noResolve = true
-     */
-    function transpileModule(input, transpileOptions) {
-        var options = transpileOptions.compilerOptions ? ts.clone(transpileOptions.compilerOptions) : getDefaultCompilerOptions();
-        options.isolatedModules = true;
-        // transpileModule does not write anything to disk so there is no need to verify that there are no conflicts between input and output paths.
-        options.suppressOutputPathCheck = true;
-        // Filename can be non-ts file.
-        options.allowNonTsExtensions = true;
-        // We are not returning a sourceFile for lib file when asked by the program,
-        // so pass --noLib to avoid reporting a file not found error.
-        options.noLib = true;
-        // We are not doing a full typecheck, we are not resolving the whole context,
-        // so pass --noResolve to avoid reporting missing file errors.
-        options.noResolve = true;
-        // if jsx is specified then treat file as .tsx
-        var inputFileName = transpileOptions.fileName || (options.jsx ? "module.tsx" : "module.ts");
-        var sourceFile = ts.createSourceFile(inputFileName, input, options.target);
-        if (transpileOptions.moduleName) {
-            sourceFile.moduleName = transpileOptions.moduleName;
-        }
-        sourceFile.renamedDependencies = transpileOptions.renamedDependencies;
-        var newLine = ts.getNewLineCharacter(options);
-        // Output
-        var outputText;
-        var sourceMapText;
-        // Create a compilerHost object to allow the compiler to read and write files
-        var compilerHost = {
-            getSourceFile: function (fileName, target) { return fileName === ts.normalizePath(inputFileName) ? sourceFile : undefined; },
-            writeFile: function (name, text, writeByteOrderMark) {
-                if (ts.fileExtensionIs(name, ".map")) {
-                    ts.Debug.assert(sourceMapText === undefined, "Unexpected multiple source map outputs for the file '" + name + "'");
-                    sourceMapText = text;
-                }
-                else {
-                    ts.Debug.assert(outputText === undefined, "Unexpected multiple outputs for the file: '" + name + "'");
-                    outputText = text;
-                }
-            },
-            getDefaultLibFileName: function () { return "lib.d.ts"; },
-            useCaseSensitiveFileNames: function () { return false; },
-            getCanonicalFileName: function (fileName) { return fileName; },
-            getCurrentDirectory: function () { return ""; },
-            getNewLine: function () { return newLine; },
-            fileExists: function (fileName) { return fileName === inputFileName; },
-            readFile: function (fileName) { return ""; },
-            directoryExists: function (directoryExists) { return true; }
-        };
-        var program = ts.createProgram([inputFileName], options, compilerHost);
-        var diagnostics;
-        if (transpileOptions.reportDiagnostics) {
-            diagnostics = [];
-            ts.addRange(/*to*/ diagnostics, /*from*/ program.getSyntacticDiagnostics(sourceFile));
-            ts.addRange(/*to*/ diagnostics, /*from*/ program.getOptionsDiagnostics());
-        }
-        // Emit
-        program.emit();
-        ts.Debug.assert(outputText !== undefined, "Output generation failed");
-        return { outputText: outputText, diagnostics: diagnostics, sourceMapText: sourceMapText };
-    }
-    ts.transpileModule = transpileModule;
-    /*
-     * This is a shortcut function for transpileModule - it accepts transpileOptions as parameters and returns only outputText part of the result.
-     */
-    function transpile(input, compilerOptions, fileName, diagnostics, moduleName) {
-        var output = transpileModule(input, { compilerOptions: compilerOptions, fileName: fileName, reportDiagnostics: !!diagnostics, moduleName: moduleName });
-        // addRange correctly handles cases when wither 'from' or 'to' argument is missing
-        ts.addRange(diagnostics, output.diagnostics);
-        return output.outputText;
-    }
-    ts.transpile = transpile;
-    function createLanguageServiceSourceFile(fileName, scriptSnapshot, scriptTarget, version, setNodeParents, scriptKind) {
-        var text = scriptSnapshot.getText(0, scriptSnapshot.getLength());
-        var sourceFile = ts.createSourceFile(fileName, text, scriptTarget, setNodeParents, scriptKind);
-        setSourceFileFields(sourceFile, scriptSnapshot, version);
-        return sourceFile;
-    }
-    ts.createLanguageServiceSourceFile = createLanguageServiceSourceFile;
-    ts.disableIncrementalParsing = false;
-    function updateLanguageServiceSourceFile(sourceFile, scriptSnapshot, version, textChangeRange, aggressiveChecks) {
-        // If we were given a text change range, and our version or open-ness changed, then
-        // incrementally parse this file.
-        if (textChangeRange) {
-            if (version !== sourceFile.version) {
-                // Once incremental parsing is ready, then just call into this function.
-                if (!ts.disableIncrementalParsing) {
-                    var newText = void 0;
-                    // grab the fragment from the beginning of the original text to the beginning of the span
-                    var prefix = textChangeRange.span.start !== 0
-                        ? sourceFile.text.substr(0, textChangeRange.span.start)
-                        : "";
-                    // grab the fragment from the end of the span till the end of the original text
-                    var suffix = ts.textSpanEnd(textChangeRange.span) !== sourceFile.text.length
-                        ? sourceFile.text.substr(ts.textSpanEnd(textChangeRange.span))
-                        : "";
-                    if (textChangeRange.newLength === 0) {
-                        // edit was a deletion - just combine prefix and suffix
-                        newText = prefix && suffix ? prefix + suffix : prefix || suffix;
-                    }
-                    else {
-                        // it was actual edit, fetch the fragment of new text that correspond to new span
-                        var changedText = scriptSnapshot.getText(textChangeRange.span.start, textChangeRange.span.start + textChangeRange.newLength);
-                        // combine prefix, changed text and suffix
-                        newText = prefix && suffix
-                            ? prefix + changedText + suffix
-                            : prefix
-                                ? (prefix + changedText)
-                                : (changedText + suffix);
-                    }
-                    var newSourceFile = ts.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
-                    setSourceFileFields(newSourceFile, scriptSnapshot, version);
-                    // after incremental parsing nameTable might not be up-to-date
-                    // drop it so it can be lazily recreated later
-                    newSourceFile.nameTable = undefined;
-                    // dispose all resources held by old script snapshot
-                    if (sourceFile !== newSourceFile && sourceFile.scriptSnapshot) {
-                        if (sourceFile.scriptSnapshot.dispose) {
-                            sourceFile.scriptSnapshot.dispose();
-                        }
-                        sourceFile.scriptSnapshot = undefined;
-                    }
-                    return newSourceFile;
-                }
-            }
-        }
-        // Otherwise, just create a new source file.
-        return createLanguageServiceSourceFile(sourceFile.fileName, scriptSnapshot, sourceFile.languageVersion, version, /*setNodeParents*/ true, sourceFile.scriptKind);
-    }
-    ts.updateLanguageServiceSourceFile = updateLanguageServiceSourceFile;
-    function createDocumentRegistry(useCaseSensitiveFileNames, currentDirectory) {
-        if (currentDirectory === void 0) { currentDirectory = ""; }
-        // Maps from compiler setting target (ES3, ES5, etc.) to all the cached documents we have
-        // for those settings.
-        var buckets = {};
-        var getCanonicalFileName = ts.createGetCanonicalFileName(!!useCaseSensitiveFileNames);
-        function getKeyForCompilationSettings(settings) {
-            return ("_" + settings.target + "|" + settings.module + "|" + settings.noResolve + "|" + settings.jsx + "|" + settings.allowJs + "|" + settings.baseUrl + "|" + settings.typesRoot + "|" + settings.typesSearchPaths + "|" + JSON.stringify(settings.rootDirs) + "|" + JSON.stringify(settings.paths));
-        }
-        function getBucketForCompilationSettings(key, createIfMissing) {
-            var bucket = ts.lookUp(buckets, key);
-            if (!bucket && createIfMissing) {
-                buckets[key] = bucket = ts.createFileMap();
-            }
-            return bucket;
-        }
-        function reportStats() {
-            var bucketInfoArray = Object.keys(buckets).filter(function (name) { return name && name.charAt(0) === "_"; }).map(function (name) {
-                var entries = ts.lookUp(buckets, name);
-                var sourceFiles = [];
-                entries.forEachValue(function (key, entry) {
-                    sourceFiles.push({
-                        name: key,
-                        refCount: entry.languageServiceRefCount,
-                        references: entry.owners.slice(0)
-                    });
-                });
-                sourceFiles.sort(function (x, y) { return y.refCount - x.refCount; });
-                return {
-                    bucket: name,
-                    sourceFiles: sourceFiles
-                };
-            });
-            return JSON.stringify(bucketInfoArray, undefined, 2);
-        }
-        function acquireDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
-        }
-        function acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
-            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ true, scriptKind);
-        }
-        function updateDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
-        }
-        function updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
-            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ false, scriptKind);
-        }
-        function acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, acquiring, scriptKind) {
-            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ true);
-            var entry = bucket.get(path);
-            if (!entry) {
-                ts.Debug.assert(acquiring, "How could we be trying to update a document that the registry doesn't have?");
-                // Have never seen this file with these settings.  Create a new source file for it.
-                var sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, compilationSettings.target, version, /*setNodeParents*/ false, scriptKind);
-                entry = {
-                    sourceFile: sourceFile,
-                    languageServiceRefCount: 0,
-                    owners: []
-                };
-                bucket.set(path, entry);
-            }
-            else {
-                // We have an entry for this file.  However, it may be for a different version of
-                // the script snapshot.  If so, update it appropriately.  Otherwise, we can just
-                // return it as is.
-                if (entry.sourceFile.version !== version) {
-                    entry.sourceFile = updateLanguageServiceSourceFile(entry.sourceFile, scriptSnapshot, version, scriptSnapshot.getChangeRange(entry.sourceFile.scriptSnapshot));
-                }
-            }
-            // If we're acquiring, then this is the first time this LS is asking for this document.
-            // Increase our ref count so we know there's another LS using the document.  If we're
-            // not acquiring, then that means the LS is 'updating' the file instead, and that means
-            // it has already acquired the document previously.  As such, we do not need to increase
-            // the ref count.
-            if (acquiring) {
-                entry.languageServiceRefCount++;
-            }
-            return entry.sourceFile;
-        }
-        function releaseDocument(fileName, compilationSettings) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return releaseDocumentWithKey(path, key);
-        }
-        function releaseDocumentWithKey(path, key) {
-            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ false);
-            ts.Debug.assert(bucket !== undefined);
-            var entry = bucket.get(path);
-            entry.languageServiceRefCount--;
-            ts.Debug.assert(entry.languageServiceRefCount >= 0);
-            if (entry.languageServiceRefCount === 0) {
-                bucket.remove(path);
-            }
-        }
-        return {
-            acquireDocument: acquireDocument,
-            acquireDocumentWithKey: acquireDocumentWithKey,
-            updateDocument: updateDocument,
-            updateDocumentWithKey: updateDocumentWithKey,
-            releaseDocument: releaseDocument,
-            releaseDocumentWithKey: releaseDocumentWithKey,
-            reportStats: reportStats,
-            getKeyForCompilationSettings: getKeyForCompilationSettings
-        };
-    }
-    ts.createDocumentRegistry = createDocumentRegistry;
-    function preProcessFile(sourceText, readImportFiles, detectJavaScriptImports) {
-        if (readImportFiles === void 0) { readImportFiles = true; }
-        if (detectJavaScriptImports === void 0) { detectJavaScriptImports = false; }
-        var referencedFiles = [];
-        var typeReferenceDirectives = [];
-        var importedFiles = [];
-        var ambientExternalModules;
-        var isNoDefaultLib = false;
-        var braceNesting = 0;
-        // assume that text represent an external module if it contains at least one top level import/export
-        // ambient modules that are found inside external modules are interpreted as module augmentations
-        var externalModule = false;
-        function nextToken() {
-            var token = scanner.scan();
-            if (token === 15 /* OpenBraceToken */) {
-                braceNesting++;
-            }
-            else if (token === 16 /* CloseBraceToken */) {
-                braceNesting--;
-            }
-            return token;
-        }
-        function processTripleSlashDirectives() {
-            var commentRanges = ts.getLeadingCommentRanges(sourceText, 0);
-            ts.forEach(commentRanges, function (commentRange) {
-                var comment = sourceText.substring(commentRange.pos, commentRange.end);
-                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, commentRange);
-                if (referencePathMatchResult) {
-                    isNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
-                    var fileReference = referencePathMatchResult.fileReference;
-                    if (fileReference) {
-                        var collection = referencePathMatchResult.isTypeReferenceDirective
-                            ? typeReferenceDirectives
-                            : referencedFiles;
-                        collection.push(fileReference);
-                    }
-                }
-            });
-        }
-        function getFileReference() {
-            var file = scanner.getTokenValue();
-            var pos = scanner.getTokenPos();
-            return {
-                fileName: file,
-                pos: pos,
-                end: pos + file.length
-            };
-        }
-        function recordAmbientExternalModule() {
-            if (!ambientExternalModules) {
-                ambientExternalModules = [];
-            }
-            ambientExternalModules.push({ ref: getFileReference(), depth: braceNesting });
-        }
-        function recordModuleName() {
-            importedFiles.push(getFileReference());
-            markAsExternalModuleIfTopLevel();
-        }
-        function markAsExternalModuleIfTopLevel() {
-            if (braceNesting === 0) {
-                externalModule = true;
-            }
-        }
-        /**
-         * Returns true if at least one token was consumed from the stream
-         */
-        function tryConsumeDeclare() {
-            var token = scanner.getToken();
-            if (token === 122 /* DeclareKeyword */) {
-                // declare module "mod"
-                token = nextToken();
-                if (token === 125 /* ModuleKeyword */) {
-                    token = nextToken();
-                    if (token === 9 /* StringLiteral */) {
-                        recordAmbientExternalModule();
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        /**
-         * Returns true if at least one token was consumed from the stream
-         */
-        function tryConsumeImport() {
-            var token = scanner.getToken();
-            if (token === 89 /* ImportKeyword */) {
-                token = nextToken();
-                if (token === 9 /* StringLiteral */) {
-                    // import "mod";
-                    recordModuleName();
-                    return true;
-                }
-                else {
-                    if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
-                        token = nextToken();
-                        if (token === 136 /* FromKeyword */) {
-                            token = nextToken();
-                            if (token === 9 /* StringLiteral */) {
-                                // import d from "mod";
-                                recordModuleName();
-                                return true;
-                            }
-                        }
-                        else if (token === 56 /* EqualsToken */) {
-                            if (tryConsumeRequireCall(/*skipCurrentToken*/ true)) {
-                                return true;
-                            }
-                        }
-                        else if (token === 24 /* CommaToken */) {
-                            // consume comma and keep going
-                            token = nextToken();
-                        }
-                        else {
-                            // unknown syntax
-                            return true;
-                        }
-                    }
-                    if (token === 15 /* OpenBraceToken */) {
-                        token = nextToken();
-                        // consume "{ a as B, c, d as D}" clauses
-                        // make sure that it stops on EOF
-                        while (token !== 16 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
-                            token = nextToken();
-                        }
-                        if (token === 16 /* CloseBraceToken */) {
-                            token = nextToken();
-                            if (token === 136 /* FromKeyword */) {
-                                token = nextToken();
-                                if (token === 9 /* StringLiteral */) {
-                                    // import {a as A} from "mod";
-                                    // import d, {a, b as B} from "mod"
-                                    recordModuleName();
-                                }
-                            }
-                        }
-                    }
-                    else if (token === 37 /* AsteriskToken */) {
-                        token = nextToken();
-                        if (token === 116 /* AsKeyword */) {
-                            token = nextToken();
-                            if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
-                                token = nextToken();
-                                if (token === 136 /* FromKeyword */) {
-                                    token = nextToken();
-                                    if (token === 9 /* StringLiteral */) {
-                                        // import * as NS from "mod"
-                                        // import d, * as NS from "mod"
-                                        recordModuleName();
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeExport() {
-            var token = scanner.getToken();
-            if (token === 82 /* ExportKeyword */) {
-                markAsExternalModuleIfTopLevel();
-                token = nextToken();
-                if (token === 15 /* OpenBraceToken */) {
-                    token = nextToken();
-                    // consume "{ a as B, c, d as D}" clauses
-                    // make sure it stops on EOF
-                    while (token !== 16 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
-                        token = nextToken();
-                    }
-                    if (token === 16 /* CloseBraceToken */) {
-                        token = nextToken();
-                        if (token === 136 /* FromKeyword */) {
-                            token = nextToken();
-                            if (token === 9 /* StringLiteral */) {
-                                // export {a as A} from "mod";
-                                // export {a, b as B} from "mod"
-                                recordModuleName();
-                            }
-                        }
-                    }
-                }
-                else if (token === 37 /* AsteriskToken */) {
-                    token = nextToken();
-                    if (token === 136 /* FromKeyword */) {
-                        token = nextToken();
-                        if (token === 9 /* StringLiteral */) {
-                            // export * from "mod"
-                            recordModuleName();
-                        }
-                    }
-                }
-                else if (token === 89 /* ImportKeyword */) {
-                    token = nextToken();
-                    if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
-                        token = nextToken();
-                        if (token === 56 /* EqualsToken */) {
-                            if (tryConsumeRequireCall(/*skipCurrentToken*/ true)) {
-                                return true;
-                            }
-                        }
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeRequireCall(skipCurrentToken) {
-            var token = skipCurrentToken ? nextToken() : scanner.getToken();
-            if (token === 129 /* RequireKeyword */) {
-                token = nextToken();
-                if (token === 17 /* OpenParenToken */) {
-                    token = nextToken();
-                    if (token === 9 /* StringLiteral */) {
-                        //  require("mod");
-                        recordModuleName();
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeDefine() {
-            var token = scanner.getToken();
-            if (token === 69 /* Identifier */ && scanner.getTokenValue() === "define") {
-                token = nextToken();
-                if (token !== 17 /* OpenParenToken */) {
-                    return true;
-                }
-                token = nextToken();
-                if (token === 9 /* StringLiteral */) {
-                    // looks like define ("modname", ... - skip string literal and comma
-                    token = nextToken();
-                    if (token === 24 /* CommaToken */) {
-                        token = nextToken();
-                    }
-                    else {
-                        // unexpected token
-                        return true;
-                    }
-                }
-                // should be start of dependency list
-                if (token !== 19 /* OpenBracketToken */) {
-                    return true;
-                }
-                // skip open bracket
-                token = nextToken();
-                var i = 0;
-                // scan until ']' or EOF
-                while (token !== 20 /* CloseBracketToken */ && token !== 1 /* EndOfFileToken */) {
-                    // record string literals as module names
-                    if (token === 9 /* StringLiteral */) {
-                        recordModuleName();
-                        i++;
-                    }
-                    token = nextToken();
-                }
-                return true;
-            }
-            return false;
-        }
-        function processImports() {
-            scanner.setText(sourceText);
-            nextToken();
-            // Look for:
-            //    import "mod";
-            //    import d from "mod"
-            //    import {a as A } from "mod";
-            //    import * as NS  from "mod"
-            //    import d, {a, b as B} from "mod"
-            //    import i = require("mod");
-            //
-            //    export * from "mod"
-            //    export {a as b} from "mod"
-            //    export import i = require("mod")
-            //    (for JavaScript files) require("mod")
-            while (true) {
-                if (scanner.getToken() === 1 /* EndOfFileToken */) {
-                    break;
-                }
-                // check if at least one of alternative have moved scanner forward
-                if (tryConsumeDeclare() ||
-                    tryConsumeImport() ||
-                    tryConsumeExport() ||
-                    (detectJavaScriptImports && (tryConsumeRequireCall(/*skipCurrentToken*/ false) || tryConsumeDefine()))) {
-                    continue;
-                }
-                else {
-                    nextToken();
-                }
-            }
-            scanner.setText(undefined);
-        }
-        if (readImportFiles) {
-            processImports();
-        }
-        processTripleSlashDirectives();
-        if (externalModule) {
-            // for external modules module all nested ambient modules are augmentations
-            if (ambientExternalModules) {
-                // move all detected ambient modules to imported files since they need to be resolved
-                for (var _i = 0, ambientExternalModules_1 = ambientExternalModules; _i < ambientExternalModules_1.length; _i++) {
-                    var decl = ambientExternalModules_1[_i];
-                    importedFiles.push(decl.ref);
-                }
-            }
-            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: undefined };
-        }
-        else {
-            // for global scripts ambient modules still can have augmentations - look for ambient modules with depth > 0
-            var ambientModuleNames = void 0;
-            if (ambientExternalModules) {
-                for (var _a = 0, ambientExternalModules_2 = ambientExternalModules; _a < ambientExternalModules_2.length; _a++) {
-                    var decl = ambientExternalModules_2[_a];
-                    if (decl.depth === 0) {
-                        if (!ambientModuleNames) {
-                            ambientModuleNames = [];
-                        }
-                        ambientModuleNames.push(decl.ref.fileName);
-                    }
-                    else {
-                        importedFiles.push(decl.ref);
-                    }
-                }
-            }
-            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: ambientModuleNames };
-        }
-    }
-    ts.preProcessFile = preProcessFile;
-    /// Helpers
-    function getTargetLabel(referenceNode, labelName) {
-        while (referenceNode) {
-            if (referenceNode.kind === 214 /* LabeledStatement */ && referenceNode.label.text === labelName) {
-                return referenceNode.label;
-            }
-            referenceNode = referenceNode.parent;
-        }
-        return undefined;
-    }
-    function isJumpStatementTarget(node) {
-        return node.kind === 69 /* Identifier */ &&
-            (node.parent.kind === 210 /* BreakStatement */ || node.parent.kind === 209 /* ContinueStatement */) &&
-            node.parent.label === node;
-    }
-    function isLabelOfLabeledStatement(node) {
-        return node.kind === 69 /* Identifier */ &&
-            node.parent.kind === 214 /* LabeledStatement */ &&
-            node.parent.label === node;
-    }
-    /**
-     * Whether or not a 'node' is preceded by a label of the given string.
-     * Note: 'node' cannot be a SourceFile.
-     */
-    function isLabeledBy(node, labelName) {
-        for (var owner = node.parent; owner.kind === 214 /* LabeledStatement */; owner = owner.parent) {
-            if (owner.label.text === labelName) {
-                return true;
-            }
-        }
-        return false;
-    }
-    function isLabelName(node) {
-        return isLabelOfLabeledStatement(node) || isJumpStatementTarget(node);
-    }
-    function isRightSideOfQualifiedName(node) {
-        return node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node;
-    }
-    function isRightSideOfPropertyAccess(node) {
-        return node && node.parent && node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node;
-    }
-    function isCallExpressionTarget(node) {
-        if (isRightSideOfPropertyAccess(node)) {
-            node = node.parent;
-        }
-        return node && node.parent && node.parent.kind === 174 /* CallExpression */ && node.parent.expression === node;
-    }
-    function isNewExpressionTarget(node) {
-        if (isRightSideOfPropertyAccess(node)) {
-            node = node.parent;
-        }
-        return node && node.parent && node.parent.kind === 175 /* NewExpression */ && node.parent.expression === node;
-    }
-    function isNameOfModuleDeclaration(node) {
-        return node.parent.kind === 225 /* ModuleDeclaration */ && node.parent.name === node;
-    }
-    function isNameOfFunctionDeclaration(node) {
-        return node.kind === 69 /* Identifier */ &&
-            ts.isFunctionLike(node.parent) && node.parent.name === node;
-    }
-    function isObjectLiteralPropertyDeclaration(node) {
-        switch (node.kind) {
-            case 253 /* PropertyAssignment */:
-            case 254 /* ShorthandPropertyAssignment */:
-            case 147 /* MethodDeclaration */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-                return true;
-        }
-        return false;
-    }
-    /**
-     * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
-     */
-    function getContainingObjectLiteralElement(node) {
-        switch (node.kind) {
-            case 9 /* StringLiteral */:
-            case 8 /* NumericLiteral */:
-                if (node.parent.kind === 140 /* ComputedPropertyName */) {
-                    return isObjectLiteralPropertyDeclaration(node.parent.parent) ? node.parent.parent : undefined;
-                }
-            // intential fall through
-            case 69 /* Identifier */:
-                return isObjectLiteralPropertyDeclaration(node.parent) && node.parent.name === node ? node.parent : undefined;
-        }
-        return undefined;
-    }
-    function isLiteralNameOfPropertyDeclarationOrIndexAccess(node) {
-        if (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) {
-            switch (node.parent.kind) {
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 253 /* PropertyAssignment */:
-                case 255 /* EnumMember */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 225 /* ModuleDeclaration */:
-                    return node.parent.name === node;
-                case 173 /* ElementAccessExpression */:
-                    return node.parent.argumentExpression === node;
-                case 140 /* ComputedPropertyName */:
-                    return true;
-            }
-        }
-        return false;
-    }
-    function isNameOfExternalModuleImportOrDeclaration(node) {
-        if (node.kind === 9 /* StringLiteral */) {
-            return isNameOfModuleDeclaration(node) ||
-                (ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) && ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node);
-        }
-        return false;
-    }
-    /** Returns true if the position is within a comment */
-    function isInsideComment(sourceFile, token, position) {
-        // The position has to be: 1. in the leading trivia (before token.getStart()), and 2. within a comment
-        return position <= token.getStart(sourceFile) &&
-            (isInsideCommentRange(ts.getTrailingCommentRanges(sourceFile.text, token.getFullStart())) ||
-                isInsideCommentRange(ts.getLeadingCommentRanges(sourceFile.text, token.getFullStart())));
-        function isInsideCommentRange(comments) {
-            return ts.forEach(comments, function (comment) {
-                // either we are 1. completely inside the comment, or 2. at the end of the comment
-                if (comment.pos < position && position < comment.end) {
-                    return true;
-                }
-                else if (position === comment.end) {
-                    var text = sourceFile.text;
-                    var width = comment.end - comment.pos;
-                    // is single line comment or just /*
-                    if (width <= 2 || text.charCodeAt(comment.pos + 1) === 47 /* slash */) {
-                        return true;
-                    }
-                    else {
-                        // is unterminated multi-line comment
-                        return !(text.charCodeAt(comment.end - 1) === 47 /* slash */ &&
-                            text.charCodeAt(comment.end - 2) === 42 /* asterisk */);
-                    }
-                }
-                return false;
-            });
-        }
-    }
-    var SemanticMeaning;
-    (function (SemanticMeaning) {
-        SemanticMeaning[SemanticMeaning["None"] = 0] = "None";
-        SemanticMeaning[SemanticMeaning["Value"] = 1] = "Value";
-        SemanticMeaning[SemanticMeaning["Type"] = 2] = "Type";
-        SemanticMeaning[SemanticMeaning["Namespace"] = 4] = "Namespace";
-        SemanticMeaning[SemanticMeaning["All"] = 7] = "All";
-    })(SemanticMeaning || (SemanticMeaning = {}));
-    var BreakContinueSearchType;
-    (function (BreakContinueSearchType) {
-        BreakContinueSearchType[BreakContinueSearchType["None"] = 0] = "None";
-        BreakContinueSearchType[BreakContinueSearchType["Unlabeled"] = 1] = "Unlabeled";
-        BreakContinueSearchType[BreakContinueSearchType["Labeled"] = 2] = "Labeled";
-        BreakContinueSearchType[BreakContinueSearchType["All"] = 3] = "All";
-    })(BreakContinueSearchType || (BreakContinueSearchType = {}));
-    // A cache of completion entries for keywords, these do not change between sessions
-    var keywordCompletions = [];
-    for (var i = 70 /* FirstKeyword */; i <= 138 /* LastKeyword */; i++) {
-        keywordCompletions.push({
-            name: ts.tokenToString(i),
-            kind: ScriptElementKind.keyword,
-            kindModifiers: ScriptElementKindModifier.none,
-            sortText: "0"
-        });
-    }
-    /* @internal */ function getContainerNode(node) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return undefined;
-            }
-            switch (node.kind) {
-                case 256 /* SourceFile */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                    return node;
-            }
-        }
-    }
-    ts.getContainerNode = getContainerNode;
-    /* @internal */ function getNodeKind(node) {
-        switch (node.kind) {
-            case 225 /* ModuleDeclaration */: return ScriptElementKind.moduleElement;
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-                return ScriptElementKind.classElement;
-            case 222 /* InterfaceDeclaration */: return ScriptElementKind.interfaceElement;
-            case 223 /* TypeAliasDeclaration */: return ScriptElementKind.typeElement;
-            case 224 /* EnumDeclaration */: return ScriptElementKind.enumElement;
-            case 218 /* VariableDeclaration */:
-                return ts.isConst(node)
-                    ? ScriptElementKind.constElement
-                    : ts.isLet(node)
-                        ? ScriptElementKind.letElement
-                        : ScriptElementKind.variableElement;
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-                return ScriptElementKind.functionElement;
-            case 149 /* GetAccessor */: return ScriptElementKind.memberGetAccessorElement;
-            case 150 /* SetAccessor */: return ScriptElementKind.memberSetAccessorElement;
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-                return ScriptElementKind.memberFunctionElement;
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-                return ScriptElementKind.memberVariableElement;
-            case 153 /* IndexSignature */: return ScriptElementKind.indexSignatureElement;
-            case 152 /* ConstructSignature */: return ScriptElementKind.constructSignatureElement;
-            case 151 /* CallSignature */: return ScriptElementKind.callSignatureElement;
-            case 148 /* Constructor */: return ScriptElementKind.constructorImplementationElement;
-            case 141 /* TypeParameter */: return ScriptElementKind.typeParameterElement;
-            case 255 /* EnumMember */: return ScriptElementKind.variableElement;
-            case 142 /* Parameter */: return (node.flags & 92 /* ParameterPropertyModifier */) ? ScriptElementKind.memberVariableElement : ScriptElementKind.parameterElement;
-            case 229 /* ImportEqualsDeclaration */:
-            case 234 /* ImportSpecifier */:
-            case 231 /* ImportClause */:
-            case 238 /* ExportSpecifier */:
-            case 232 /* NamespaceImport */:
-                return ScriptElementKind.alias;
-        }
-        return ScriptElementKind.unknown;
-    }
-    ts.getNodeKind = getNodeKind;
-    var CancellationTokenObject = (function () {
-        function CancellationTokenObject(cancellationToken) {
-            this.cancellationToken = cancellationToken;
-        }
-        CancellationTokenObject.prototype.isCancellationRequested = function () {
-            return this.cancellationToken && this.cancellationToken.isCancellationRequested();
-        };
-        CancellationTokenObject.prototype.throwIfCancellationRequested = function () {
-            if (this.isCancellationRequested()) {
-                throw new ts.OperationCanceledException();
-            }
-        };
-        return CancellationTokenObject;
-    }());
-    function createLanguageService(host, documentRegistry) {
-        if (documentRegistry === void 0) { documentRegistry = createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory()); }
-        var syntaxTreeCache = new SyntaxTreeCache(host);
-        var ruleProvider;
-        var program;
-        var lastProjectVersion;
-        var useCaseSensitivefileNames = false;
-        var cancellationToken = new CancellationTokenObject(host.getCancellationToken && host.getCancellationToken());
-        var currentDirectory = host.getCurrentDirectory();
-        // Check if the localized messages json is set, otherwise query the host for it
-        if (!ts.localizedDiagnosticMessages && host.getLocalizedDiagnosticMessages) {
-            ts.localizedDiagnosticMessages = host.getLocalizedDiagnosticMessages();
-        }
-        function log(message) {
-            if (host.log) {
-                host.log(message);
-            }
-        }
-        var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitivefileNames);
-        function getValidSourceFile(fileName) {
-            var sourceFile = program.getSourceFile(fileName);
-            if (!sourceFile) {
-                throw new Error("Could not find file: '" + fileName + "'.");
-            }
-            return sourceFile;
-        }
-        function getRuleProvider(options) {
-            // Ensure rules are initialized and up to date wrt to formatting options
-            if (!ruleProvider) {
-                ruleProvider = new ts.formatting.RulesProvider();
-            }
-            ruleProvider.ensureUpToDate(options);
-            return ruleProvider;
-        }
-        function synchronizeHostData() {
-            // perform fast check if host supports it
-            if (host.getProjectVersion) {
-                var hostProjectVersion = host.getProjectVersion();
-                if (hostProjectVersion) {
-                    if (lastProjectVersion === hostProjectVersion) {
-                        return;
-                    }
-                    lastProjectVersion = hostProjectVersion;
-                }
-            }
-            // Get a fresh cache of the host information
-            var hostCache = new HostCache(host, getCanonicalFileName);
-            // If the program is already up-to-date, we can reuse it
-            if (programUpToDate()) {
-                return;
-            }
-            // IMPORTANT - It is critical from this moment onward that we do not check
-            // cancellation tokens.  We are about to mutate source files from a previous program
-            // instance.  If we cancel midway through, we may end up in an inconsistent state where
-            // the program points to old source files that have been invalidated because of
-            // incremental parsing.
-            var oldSettings = program && program.getCompilerOptions();
-            var newSettings = hostCache.compilationSettings();
-            var changesInCompilationSettingsAffectSyntax = oldSettings &&
-                (oldSettings.target !== newSettings.target ||
-                    oldSettings.module !== newSettings.module ||
-                    oldSettings.noResolve !== newSettings.noResolve ||
-                    oldSettings.jsx !== newSettings.jsx ||
-                    oldSettings.allowJs !== newSettings.allowJs);
-            // Now create a new compiler
-            var compilerHost = {
-                getSourceFile: getOrCreateSourceFile,
-                getSourceFileByPath: getOrCreateSourceFileByPath,
-                getCancellationToken: function () { return cancellationToken; },
-                getCanonicalFileName: getCanonicalFileName,
-                useCaseSensitiveFileNames: function () { return useCaseSensitivefileNames; },
-                getNewLine: function () { return ts.getNewLineOrDefaultFromHost(host); },
-                getDefaultLibFileName: function (options) { return host.getDefaultLibFileName(options); },
-                writeFile: function (fileName, data, writeByteOrderMark) { },
-                getCurrentDirectory: function () { return currentDirectory; },
-                fileExists: function (fileName) {
-                    // stub missing host functionality
-                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
-                    return hostCache.getOrCreateEntry(fileName) !== undefined;
-                },
-                readFile: function (fileName) {
-                    // stub missing host functionality
-                    var entry = hostCache.getOrCreateEntry(fileName);
-                    return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
-                },
-                directoryExists: function (directoryName) {
-                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
-                    return ts.directoryProbablyExists(directoryName, host);
-                }
-            };
-            if (host.trace) {
-                compilerHost.trace = function (message) { return host.trace(message); };
-            }
-            if (host.resolveModuleNames) {
-                compilerHost.resolveModuleNames = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
-            }
-            if (host.resolveTypeReferenceDirectives) {
-                compilerHost.resolveTypeReferenceDirectives = function (typeReferenceDirectiveNames, containingFile) {
-                    return host.resolveTypeReferenceDirectives(typeReferenceDirectiveNames, containingFile);
-                };
-            }
-            var documentRegistryBucketKey = documentRegistry.getKeyForCompilationSettings(newSettings);
-            var newProgram = ts.createProgram(hostCache.getRootFileNames(), newSettings, compilerHost, program);
-            // Release any files we have acquired in the old program but are
-            // not part of the new program.
-            if (program) {
-                var oldSourceFiles = program.getSourceFiles();
-                var oldSettingsKey = documentRegistry.getKeyForCompilationSettings(oldSettings);
-                for (var _i = 0, oldSourceFiles_1 = oldSourceFiles; _i < oldSourceFiles_1.length; _i++) {
-                    var oldSourceFile = oldSourceFiles_1[_i];
-                    if (!newProgram.getSourceFile(oldSourceFile.fileName) || changesInCompilationSettingsAffectSyntax) {
-                        documentRegistry.releaseDocumentWithKey(oldSourceFile.path, oldSettingsKey);
-                    }
-                }
-            }
-            // hostCache is captured in the closure for 'getOrCreateSourceFile' but it should not be used past this point.
-            // It needs to be cleared to allow all collected snapshots to be released
-            hostCache = undefined;
-            program = newProgram;
-            // Make sure all the nodes in the program are both bound, and have their parent
-            // pointers set property.
-            program.getTypeChecker();
-            return;
-            function getOrCreateSourceFile(fileName) {
-                return getOrCreateSourceFileByPath(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName));
-            }
-            function getOrCreateSourceFileByPath(fileName, path) {
-                ts.Debug.assert(hostCache !== undefined);
-                // The program is asking for this file, check first if the host can locate it.
-                // If the host can not locate the file, then it does not exist. return undefined
-                // to the program to allow reporting of errors for missing files.
-                var hostFileInformation = hostCache.getOrCreateEntryByPath(fileName, path);
-                if (!hostFileInformation) {
-                    return undefined;
-                }
-                // Check if the language version has changed since we last created a program; if they are the same,
-                // it is safe to reuse the sourceFiles; if not, then the shape of the AST can change, and the oldSourceFile
-                // can not be reused. we have to dump all syntax trees and create new ones.
-                if (!changesInCompilationSettingsAffectSyntax) {
-                    // Check if the old program had this file already
-                    var oldSourceFile = program && program.getSourceFileByPath(path);
-                    if (oldSourceFile) {
-                        // We already had a source file for this file name.  Go to the registry to
-                        // ensure that we get the right up to date version of it.  We need this to
-                        // address the following race-condition.  Specifically, say we have the following:
-                        //
-                        //      LS1
-                        //          \
-                        //           DocumentRegistry
-                        //          /
-                        //      LS2
-                        //
-                        // Each LS has a reference to file 'foo.ts' at version 1.  LS2 then updates
-                        // it's version of 'foo.ts' to version 2.  This will cause LS2 and the
-                        // DocumentRegistry to have version 2 of the document.  HOwever, LS1 will
-                        // have version 1.  And *importantly* this source file will be *corrupt*.
-                        // The act of creating version 2 of the file irrevocably damages the version
-                        // 1 file.
-                        //
-                        // So, later when we call into LS1, we need to make sure that it doesn't use
-                        // it's source file any more, and instead defers to DocumentRegistry to get
-                        // either version 1, version 2 (or some other version) depending on what the
-                        // host says should be used.
-                        // We do not support the scenario where a host can modify a registered
-                        // file's script kind, i.e. in one project some file is treated as ".ts"
-                        // and in another as ".js"
-                        ts.Debug.assert(hostFileInformation.scriptKind === oldSourceFile.scriptKind, "Registered script kind (" + oldSourceFile.scriptKind + ") should match new script kind (" + hostFileInformation.scriptKind + ") for file: " + path);
-                        return documentRegistry.updateDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
-                    }
-                }
-                // Could not find this file in the old program, create a new SourceFile for it.
-                return documentRegistry.acquireDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
-            }
-            function sourceFileUpToDate(sourceFile) {
-                if (!sourceFile) {
-                    return false;
-                }
-                var path = sourceFile.path || ts.toPath(sourceFile.fileName, currentDirectory, getCanonicalFileName);
-                return sourceFile.version === hostCache.getVersion(path);
-            }
-            function programUpToDate() {
-                // If we haven't create a program yet, then it is not up-to-date
-                if (!program) {
-                    return false;
-                }
-                // If number of files in the program do not match, it is not up-to-date
-                var rootFileNames = hostCache.getRootFileNames();
-                if (program.getSourceFiles().length !== rootFileNames.length) {
-                    return false;
-                }
-                // If any file is not up-to-date, then the whole program is not up-to-date
-                for (var _i = 0, rootFileNames_2 = rootFileNames; _i < rootFileNames_2.length; _i++) {
-                    var fileName = rootFileNames_2[_i];
-                    if (!sourceFileUpToDate(program.getSourceFile(fileName))) {
-                        return false;
-                    }
-                }
-                // If the compilation settings do no match, then the program is not up-to-date
-                return ts.compareDataObjects(program.getCompilerOptions(), hostCache.compilationSettings());
-            }
-        }
-        function getProgram() {
-            synchronizeHostData();
-            return program;
-        }
-        function cleanupSemanticCache() {
-            // TODO: Should we jettison the program (or it's type checker) here?
-        }
-        function dispose() {
-            if (program) {
-                ts.forEach(program.getSourceFiles(), function (f) {
-                    return documentRegistry.releaseDocument(f.fileName, program.getCompilerOptions());
-                });
-            }
-        }
-        /// Diagnostics
-        function getSyntacticDiagnostics(fileName) {
-            synchronizeHostData();
-            return program.getSyntacticDiagnostics(getValidSourceFile(fileName), cancellationToken);
-        }
-        /**
-         * getSemanticDiagnostics return array of Diagnostics. If '-d' is not enabled, only report semantic errors
-         * If '-d' enabled, report both semantic and emitter errors
-         */
-        function getSemanticDiagnostics(fileName) {
-            synchronizeHostData();
-            var targetSourceFile = getValidSourceFile(fileName);
-            // Only perform the action per file regardless of '-out' flag as LanguageServiceHost is expected to call this function per file.
-            // Therefore only get diagnostics for given file.
-            var semanticDiagnostics = program.getSemanticDiagnostics(targetSourceFile, cancellationToken);
-            if (!program.getCompilerOptions().declaration) {
-                return semanticDiagnostics;
-            }
-            // If '-d' is enabled, check for emitter error. One example of emitter error is export class implements non-export interface
-            var declarationDiagnostics = program.getDeclarationDiagnostics(targetSourceFile, cancellationToken);
-            return ts.concatenate(semanticDiagnostics, declarationDiagnostics);
-        }
-        function getCompilerOptionsDiagnostics() {
-            synchronizeHostData();
-            return program.getOptionsDiagnostics(cancellationToken).concat(program.getGlobalDiagnostics(cancellationToken));
-        }
-        /**
-         * Get the name to be display in completion from a given symbol.
-         *
-         * @return undefined if the name is of external module otherwise a name with striped of any quote
-         */
-        function getCompletionEntryDisplayNameForSymbol(symbol, target, performCharacterChecks, location) {
-            var displayName = ts.getDeclaredName(program.getTypeChecker(), symbol, location);
-            if (displayName) {
-                var firstCharCode = displayName.charCodeAt(0);
-                // First check of the displayName is not external module; if it is an external module, it is not valid entry
-                if ((symbol.flags & 1536 /* Namespace */) && (firstCharCode === 39 /* singleQuote */ || firstCharCode === 34 /* doubleQuote */)) {
-                    // If the symbol is external module, don't show it in the completion list
-                    // (i.e declare module "http" { const x; } | // <= request completion here, "http" should not be there)
-                    return undefined;
-                }
-            }
-            return getCompletionEntryDisplayName(displayName, target, performCharacterChecks);
-        }
-        /**
-         * Get a displayName from a given for completion list, performing any necessary quotes stripping
-         * and checking whether the name is valid identifier name.
-         */
-        function getCompletionEntryDisplayName(name, target, performCharacterChecks) {
-            if (!name) {
-                return undefined;
-            }
-            name = ts.stripQuotes(name);
-            if (!name) {
-                return undefined;
-            }
-            // If the user entered name for the symbol was quoted, removing the quotes is not enough, as the name could be an
-            // invalid identifier name. We need to check if whatever was inside the quotes is actually a valid identifier name.
-            // e.g "b a" is valid quoted name but when we strip off the quotes, it is invalid.
-            // We, thus, need to check if whatever was inside the quotes is actually a valid identifier name.
-            if (performCharacterChecks) {
-                if (!ts.isIdentifier(name, target)) {
-                    return undefined;
-                }
-            }
-            return name;
-        }
-        function getCompletionData(fileName, position) {
-            var typeChecker = program.getTypeChecker();
-            var sourceFile = getValidSourceFile(fileName);
-            var isJavaScriptFile = ts.isSourceFileJavaScript(sourceFile);
-            var isJsDocTagName = false;
-            var start = new Date().getTime();
-            var currentToken = ts.getTokenAtPosition(sourceFile, position);
-            log("getCompletionData: Get current token: " + (new Date().getTime() - start));
-            start = new Date().getTime();
-            // Completion not allowed inside comments, bail out if this is the case
-            var insideComment = isInsideComment(sourceFile, currentToken, position);
-            log("getCompletionData: Is inside comment: " + (new Date().getTime() - start));
-            if (insideComment) {
-                // The current position is next to the '@' sign, when no tag name being provided yet.
-                // Provide a full list of tag names
-                if (ts.hasDocComment(sourceFile, position) && sourceFile.text.charCodeAt(position - 1) === 64 /* at */) {
-                    isJsDocTagName = true;
-                }
-                // Completion should work inside certain JsDoc tags. For example:
-                //     /** @type {number | string} */
-                // Completion should work in the brackets
-                var insideJsDocTagExpression = false;
-                var tag = ts.getJsDocTagAtPosition(sourceFile, position);
-                if (tag) {
-                    if (tag.tagName.pos <= position && position <= tag.tagName.end) {
-                        isJsDocTagName = true;
-                    }
-                    switch (tag.kind) {
-                        case 277 /* JSDocTypeTag */:
-                        case 275 /* JSDocParameterTag */:
-                        case 276 /* JSDocReturnTag */:
-                            var tagWithExpression = tag;
-                            if (tagWithExpression.typeExpression) {
-                                insideJsDocTagExpression = tagWithExpression.typeExpression.pos < position && position < tagWithExpression.typeExpression.end;
-                            }
-                            break;
-                    }
-                }
-                if (isJsDocTagName) {
-                    return { symbols: undefined, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, isJsDocTagName: isJsDocTagName };
-                }
-                if (!insideJsDocTagExpression) {
-                    // Proceed if the current position is in jsDoc tag expression; otherwise it is a normal
-                    // comment or the plain text part of a jsDoc comment, so no completion should be available
-                    log("Returning an empty list because completion was inside a regular comment or plain text part of a JsDoc comment.");
-                    return undefined;
-                }
-            }
-            start = new Date().getTime();
-            var previousToken = ts.findPrecedingToken(position, sourceFile);
-            log("getCompletionData: Get previous token 1: " + (new Date().getTime() - start));
-            // The decision to provide completion depends on the contextToken, which is determined through the previousToken.
-            // Note: 'previousToken' (and thus 'contextToken') can be undefined if we are the beginning of the file
-            var contextToken = previousToken;
-            // Check if the caret is at the end of an identifier; this is a partial identifier that we want to complete: e.g. a.toS|
-            // Skip this partial identifier and adjust the contextToken to the token that precedes it.
-            if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
-                var start_5 = new Date().getTime();
-                contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
-                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_5));
-            }
-            // Find the node where completion is requested on.
-            // Also determine whether we are trying to complete with members of that node
-            // or attributes of a JSX tag.
-            var node = currentToken;
-            var isRightOfDot = false;
-            var isRightOfOpenTag = false;
-            var isStartingCloseTag = false;
-            var location = ts.getTouchingPropertyName(sourceFile, position);
-            if (contextToken) {
-                // Bail out if this is a known invalid completion location
-                if (isCompletionListBlocker(contextToken)) {
-                    log("Returning an empty list because completion was requested in an invalid position.");
-                    return undefined;
-                }
-                var parent_16 = contextToken.parent, kind = contextToken.kind;
-                if (kind === 21 /* DotToken */) {
-                    if (parent_16.kind === 172 /* PropertyAccessExpression */) {
-                        node = contextToken.parent.expression;
-                        isRightOfDot = true;
-                    }
-                    else if (parent_16.kind === 139 /* QualifiedName */) {
-                        node = contextToken.parent.left;
-                        isRightOfDot = true;
-                    }
-                    else {
-                        // There is nothing that precedes the dot, so this likely just a stray character
-                        // or leading into a '...' token. Just bail out instead.
-                        return undefined;
-                    }
-                }
-                else if (sourceFile.languageVariant === 1 /* JSX */) {
-                    if (kind === 25 /* LessThanToken */) {
-                        isRightOfOpenTag = true;
-                        location = contextToken;
-                    }
-                    else if (kind === 39 /* SlashToken */ && contextToken.parent.kind === 245 /* JsxClosingElement */) {
-                        isStartingCloseTag = true;
-                        location = contextToken;
-                    }
-                }
-            }
-            var semanticStart = new Date().getTime();
-            var isMemberCompletion;
-            var isNewIdentifierLocation;
-            var symbols = [];
-            if (isRightOfDot) {
-                getTypeScriptMemberSymbols();
-            }
-            else if (isRightOfOpenTag) {
-                var tagSymbols = typeChecker.getJsxIntrinsicTagNames();
-                if (tryGetGlobalSymbols()) {
-                    symbols = tagSymbols.concat(symbols.filter(function (s) { return !!(s.flags & (107455 /* Value */ | 8388608 /* Alias */)); }));
-                }
-                else {
-                    symbols = tagSymbols;
-                }
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-            }
-            else if (isStartingCloseTag) {
-                var tagName = contextToken.parent.parent.openingElement.tagName;
-                var tagSymbol = typeChecker.getSymbolAtLocation(tagName);
-                if (!typeChecker.isUnknownSymbol(tagSymbol)) {
-                    symbols = [tagSymbol];
-                }
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-            }
-            else {
-                // For JavaScript or TypeScript, if we're not after a dot, then just try to get the
-                // global symbols in scope.  These results should be valid for either language as
-                // the set of symbols that can be referenced from this location.
-                if (!tryGetGlobalSymbols()) {
-                    return undefined;
-                }
-            }
-            log("getCompletionData: Semantic work: " + (new Date().getTime() - semanticStart));
-            return { symbols: symbols, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, location: location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), isJsDocTagName: isJsDocTagName };
-            function getTypeScriptMemberSymbols() {
-                // Right of dot member completion list
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-                if (node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */ || node.kind === 172 /* PropertyAccessExpression */) {
-                    var symbol = typeChecker.getSymbolAtLocation(node);
-                    // This is an alias, follow what it aliases
-                    if (symbol && symbol.flags & 8388608 /* Alias */) {
-                        symbol = typeChecker.getAliasedSymbol(symbol);
-                    }
-                    if (symbol && symbol.flags & 1952 /* HasExports */) {
-                        // Extract module or enum members
-                        var exportedSymbols = typeChecker.getExportsOfModule(symbol);
-                        ts.forEach(exportedSymbols, function (symbol) {
-                            if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
-                                symbols.push(symbol);
-                            }
-                        });
-                    }
-                }
-                var type = typeChecker.getTypeAtLocation(node);
-                addTypeProperties(type);
-            }
-            function addTypeProperties(type) {
-                if (type) {
-                    // Filter private properties
-                    for (var _i = 0, _a = type.getApparentProperties(); _i < _a.length; _i++) {
-                        var symbol = _a[_i];
-                        if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
-                            symbols.push(symbol);
-                        }
-                    }
-                    if (isJavaScriptFile && type.flags & 16384 /* Union */) {
-                        // In javascript files, for union types, we don't just get the members that
-                        // the individual types have in common, we also include all the members that
-                        // each individual type has.  This is because we're going to add all identifiers
-                        // anyways.  So we might as well elevate the members that were at least part
-                        // of the individual types to a higher status since we know what they are.
-                        var unionType = type;
-                        for (var _b = 0, _c = unionType.types; _b < _c.length; _b++) {
-                            var elementType = _c[_b];
-                            addTypeProperties(elementType);
-                        }
-                    }
-                }
-            }
-            function tryGetGlobalSymbols() {
-                var objectLikeContainer;
-                var namedImportsOrExports;
-                var jsxContainer;
-                if (objectLikeContainer = tryGetObjectLikeCompletionContainer(contextToken)) {
-                    return tryGetObjectLikeCompletionSymbols(objectLikeContainer);
-                }
-                if (namedImportsOrExports = tryGetNamedImportsOrExportsForCompletion(contextToken)) {
-                    // cursor is in an import clause
-                    // try to show exported member for imported module
-                    return tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports);
-                }
-                if (jsxContainer = tryGetContainingJsxElement(contextToken)) {
-                    var attrsType = void 0;
-                    if ((jsxContainer.kind === 242 /* JsxSelfClosingElement */) || (jsxContainer.kind === 243 /* JsxOpeningElement */)) {
-                        // Cursor is inside a JSX self-closing element or opening element
-                        attrsType = typeChecker.getJsxElementAttributesType(jsxContainer);
-                        if (attrsType) {
-                            symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), jsxContainer.attributes);
-                            isMemberCompletion = true;
-                            isNewIdentifierLocation = false;
-                            return true;
-                        }
-                    }
-                }
-                // Get all entities in the current scope.
-                isMemberCompletion = false;
-                isNewIdentifierLocation = isNewIdentifierDefinitionLocation(contextToken);
-                if (previousToken !== contextToken) {
-                    ts.Debug.assert(!!previousToken, "Expected 'contextToken' to be defined when different from 'previousToken'.");
-                }
-                // We need to find the node that will give us an appropriate scope to begin
-                // aggregating completion candidates. This is achieved in 'getScopeNode'
-                // by finding the first node that encompasses a position, accounting for whether a node
-                // is "complete" to decide whether a position belongs to the node.
-                //
-                // However, at the end of an identifier, we are interested in the scope of the identifier
-                // itself, but fall outside of the identifier. For instance:
-                //
-                //      xyz => x$
-                //
-                // the cursor is outside of both the 'x' and the arrow function 'xyz => x',
-                // so 'xyz' is not returned in our results.
-                //
-                // We define 'adjustedPosition' so that we may appropriately account for
-                // being at the end of an identifier. The intention is that if requesting completion
-                // at the end of an identifier, it should be effectively equivalent to requesting completion
-                // anywhere inside/at the beginning of the identifier. So in the previous case, the
-                // 'adjustedPosition' will work as if requesting completion in the following:
-                //
-                //      xyz => $x
-                //
-                // If previousToken !== contextToken, then
-                //   - 'contextToken' was adjusted to the token prior to 'previousToken'
-                //      because we were at the end of an identifier.
-                //   - 'previousToken' is defined.
-                var adjustedPosition = previousToken !== contextToken ?
-                    previousToken.getStart() :
-                    position;
-                var scopeNode = getScopeNode(contextToken, adjustedPosition, sourceFile) || sourceFile;
-                /// TODO filter meaning based on the current context
-                var symbolMeanings = 793056 /* Type */ | 107455 /* Value */ | 1536 /* Namespace */ | 8388608 /* Alias */;
-                symbols = typeChecker.getSymbolsInScope(scopeNode, symbolMeanings);
-                return true;
-            }
-            /**
-             * Finds the first node that "embraces" the position, so that one may
-             * accurately aggregate locals from the closest containing scope.
-             */
-            function getScopeNode(initialToken, position, sourceFile) {
-                var scope = initialToken;
-                while (scope && !ts.positionBelongsToNode(scope, position, sourceFile)) {
-                    scope = scope.parent;
-                }
-                return scope;
-            }
-            function isCompletionListBlocker(contextToken) {
-                var start = new Date().getTime();
-                var result = isInStringOrRegularExpressionOrTemplateLiteral(contextToken) ||
-                    isSolelyIdentifierDefinitionLocation(contextToken) ||
-                    isDotOfNumericLiteral(contextToken) ||
-                    isInJsxText(contextToken);
-                log("getCompletionsAtPosition: isCompletionListBlocker: " + (new Date().getTime() - start));
-                return result;
-            }
-            function isInJsxText(contextToken) {
-                if (contextToken.kind === 244 /* JsxText */) {
-                    return true;
-                }
-                if (contextToken.kind === 27 /* GreaterThanToken */ && contextToken.parent) {
-                    if (contextToken.parent.kind === 243 /* JsxOpeningElement */) {
-                        return true;
-                    }
-                    if (contextToken.parent.kind === 245 /* JsxClosingElement */ || contextToken.parent.kind === 242 /* JsxSelfClosingElement */) {
-                        return contextToken.parent.parent && contextToken.parent.parent.kind === 241 /* JsxElement */;
-                    }
-                }
-                return false;
-            }
-            function isNewIdentifierDefinitionLocation(previousToken) {
-                if (previousToken) {
-                    var containingNodeKind = previousToken.parent.kind;
-                    switch (previousToken.kind) {
-                        case 24 /* CommaToken */:
-                            return containingNodeKind === 174 /* CallExpression */ // func( a, |
-                                || containingNodeKind === 148 /* Constructor */ // constructor( a, |   /* public, protected, private keywords are allowed here, so show completion */
-                                || containingNodeKind === 175 /* NewExpression */ // new C(a, |
-                                || containingNodeKind === 170 /* ArrayLiteralExpression */ // [a, |
-                                || containingNodeKind === 187 /* BinaryExpression */ // const x = (a, |
-                                || containingNodeKind === 156 /* FunctionType */; // var x: (s: string, list|
-                        case 17 /* OpenParenToken */:
-                            return containingNodeKind === 174 /* CallExpression */ // func( |
-                                || containingNodeKind === 148 /* Constructor */ // constructor( |
-                                || containingNodeKind === 175 /* NewExpression */ // new C(a|
-                                || containingNodeKind === 178 /* ParenthesizedExpression */ // const x = (a|
-                                || containingNodeKind === 164 /* ParenthesizedType */; // function F(pred: (a| /* this can become an arrow function, where 'a' is the argument */
-                        case 19 /* OpenBracketToken */:
-                            return containingNodeKind === 170 /* ArrayLiteralExpression */ // [ |
-                                || containingNodeKind === 153 /* IndexSignature */ // [ | : string ]
-                                || containingNodeKind === 140 /* ComputedPropertyName */; // [ |    /* this can become an index signature */
-                        case 125 /* ModuleKeyword */: // module |
-                        case 126 /* NamespaceKeyword */:
-                            return true;
-                        case 21 /* DotToken */:
-                            return containingNodeKind === 225 /* ModuleDeclaration */; // module A.|
-                        case 15 /* OpenBraceToken */:
-                            return containingNodeKind === 221 /* ClassDeclaration */; // class A{ |
-                        case 56 /* EqualsToken */:
-                            return containingNodeKind === 218 /* VariableDeclaration */ // const x = a|
-                                || containingNodeKind === 187 /* BinaryExpression */; // x = a|
-                        case 12 /* TemplateHead */:
-                            return containingNodeKind === 189 /* TemplateExpression */; // `aa ${|
-                        case 13 /* TemplateMiddle */:
-                            return containingNodeKind === 197 /* TemplateSpan */; // `aa ${10} dd ${|
-                        case 112 /* PublicKeyword */:
-                        case 110 /* PrivateKeyword */:
-                        case 111 /* ProtectedKeyword */:
-                            return containingNodeKind === 145 /* PropertyDeclaration */; // class A{ public |
-                    }
-                    // Previous token may have been a keyword that was converted to an identifier.
-                    switch (previousToken.getText()) {
-                        case "public":
-                        case "protected":
-                        case "private":
-                            return true;
-                    }
-                }
-                return false;
-            }
-            function isInStringOrRegularExpressionOrTemplateLiteral(contextToken) {
-                if (contextToken.kind === 9 /* StringLiteral */
-                    || contextToken.kind === 166 /* StringLiteralType */
-                    || contextToken.kind === 10 /* RegularExpressionLiteral */
-                    || ts.isTemplateLiteralKind(contextToken.kind)) {
-                    var start_6 = contextToken.getStart();
-                    var end = contextToken.getEnd();
-                    // To be "in" one of these literals, the position has to be:
-                    //   1. entirely within the token text.
-                    //   2. at the end position of an unterminated token.
-                    //   3. at the end of a regular expression (due to trailing flags like '/foo/g').
-                    if (start_6 < position && position < end) {
-                        return true;
-                    }
-                    if (position === end) {
-                        return !!contextToken.isUnterminated
-                            || contextToken.kind === 10 /* RegularExpressionLiteral */;
-                    }
-                }
-                return false;
-            }
-            /**
-             * Aggregates relevant symbols for completion in object literals and object binding patterns.
-             * Relevant symbols are stored in the captured 'symbols' variable.
-             *
-             * @returns true if 'symbols' was successfully populated; false otherwise.
-             */
-            function tryGetObjectLikeCompletionSymbols(objectLikeContainer) {
-                // We're looking up possible property names from contextual/inferred/declared type.
-                isMemberCompletion = true;
-                var typeForObject;
-                var existingMembers;
-                if (objectLikeContainer.kind === 171 /* ObjectLiteralExpression */) {
-                    // We are completing on contextual types, but may also include properties
-                    // other than those within the declared type.
-                    isNewIdentifierLocation = true;
-                    typeForObject = typeChecker.getContextualType(objectLikeContainer);
-                    existingMembers = objectLikeContainer.properties;
-                }
-                else if (objectLikeContainer.kind === 167 /* ObjectBindingPattern */) {
-                    // We are *only* completing on properties from the type being destructured.
-                    isNewIdentifierLocation = false;
-                    var rootDeclaration = ts.getRootDeclaration(objectLikeContainer.parent);
-                    if (ts.isVariableLike(rootDeclaration)) {
-                        // We don't want to complete using the type acquired by the shape
-                        // of the binding pattern; we are only interested in types acquired
-                        // through type declaration or inference.
-                        // Also proceed if rootDeclaration is parameter and if its containing function expression\arrow function is contextually typed -
-                        // type of parameter will flow in from the contextual type of the function
-                        var canGetType = !!(rootDeclaration.initializer || rootDeclaration.type);
-                        if (!canGetType && rootDeclaration.kind === 142 /* Parameter */) {
-                            if (ts.isExpression(rootDeclaration.parent)) {
-                                canGetType = !!typeChecker.getContextualType(rootDeclaration.parent);
-                            }
-                            else if (rootDeclaration.parent.kind === 147 /* MethodDeclaration */ || rootDeclaration.parent.kind === 150 /* SetAccessor */) {
-                                canGetType = ts.isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(rootDeclaration.parent.parent);
-                            }
-                        }
-                        if (canGetType) {
-                            typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
-                            existingMembers = objectLikeContainer.elements;
-                        }
-                    }
-                    else {
-                        ts.Debug.fail("Root declaration is not variable-like.");
-                    }
-                }
-                else {
-                    ts.Debug.fail("Expected object literal or binding pattern, got " + objectLikeContainer.kind);
-                }
-                if (!typeForObject) {
-                    return false;
-                }
-                var typeMembers = typeChecker.getPropertiesOfType(typeForObject);
-                if (typeMembers && typeMembers.length > 0) {
-                    // Add filtered items to the completion list
-                    symbols = filterObjectMembersList(typeMembers, existingMembers);
-                }
-                return true;
-            }
-            /**
-             * Aggregates relevant symbols for completion in import clauses and export clauses
-             * whose declarations have a module specifier; for instance, symbols will be aggregated for
-             *
-             *      import { | } from "moduleName";
-             *      export { a as foo, | } from "moduleName";
-             *
-             * but not for
-             *
-             *      export { | };
-             *
-             * Relevant symbols are stored in the captured 'symbols' variable.
-             *
-             * @returns true if 'symbols' was successfully populated; false otherwise.
-             */
-            function tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports) {
-                var declarationKind = namedImportsOrExports.kind === 233 /* NamedImports */ ?
-                    230 /* ImportDeclaration */ :
-                    236 /* ExportDeclaration */;
-                var importOrExportDeclaration = ts.getAncestor(namedImportsOrExports, declarationKind);
-                var moduleSpecifier = importOrExportDeclaration.moduleSpecifier;
-                if (!moduleSpecifier) {
-                    return false;
-                }
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-                var exports;
-                var moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(importOrExportDeclaration.moduleSpecifier);
-                if (moduleSpecifierSymbol) {
-                    exports = typeChecker.getExportsOfModule(moduleSpecifierSymbol);
-                }
-                symbols = exports ? filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements) : emptyArray;
-                return true;
-            }
-            /**
-             * Returns the immediate owning object literal or binding pattern of a context token,
-             * on the condition that one exists and that the context implies completion should be given.
-             */
-            function tryGetObjectLikeCompletionContainer(contextToken) {
-                if (contextToken) {
-                    switch (contextToken.kind) {
-                        case 15 /* OpenBraceToken */: // const x = { |
-                        case 24 /* CommaToken */:
-                            var parent_17 = contextToken.parent;
-                            if (parent_17 && (parent_17.kind === 171 /* ObjectLiteralExpression */ || parent_17.kind === 167 /* ObjectBindingPattern */)) {
-                                return parent_17;
-                            }
-                            break;
-                    }
-                }
-                return undefined;
-            }
-            /**
-             * Returns the containing list of named imports or exports of a context token,
-             * on the condition that one exists and that the context implies completion should be given.
-             */
-            function tryGetNamedImportsOrExportsForCompletion(contextToken) {
-                if (contextToken) {
-                    switch (contextToken.kind) {
-                        case 15 /* OpenBraceToken */: // import { |
-                        case 24 /* CommaToken */:
-                            switch (contextToken.parent.kind) {
-                                case 233 /* NamedImports */:
-                                case 237 /* NamedExports */:
-                                    return contextToken.parent;
-                            }
-                    }
-                }
-                return undefined;
-            }
-            function tryGetContainingJsxElement(contextToken) {
-                if (contextToken) {
-                    var parent_18 = contextToken.parent;
-                    switch (contextToken.kind) {
-                        case 26 /* LessThanSlashToken */:
-                        case 39 /* SlashToken */:
-                        case 69 /* Identifier */:
-                        case 246 /* JsxAttribute */:
-                        case 247 /* JsxSpreadAttribute */:
-                            if (parent_18 && (parent_18.kind === 242 /* JsxSelfClosingElement */ || parent_18.kind === 243 /* JsxOpeningElement */)) {
-                                return parent_18;
-                            }
-                            else if (parent_18.kind === 246 /* JsxAttribute */) {
-                                return parent_18.parent;
-                            }
-                            break;
-                        // The context token is the closing } or " of an attribute, which means
-                        // its parent is a JsxExpression, whose parent is a JsxAttribute,
-                        // whose parent is a JsxOpeningLikeElement
-                        case 9 /* StringLiteral */:
-                            if (parent_18 && ((parent_18.kind === 246 /* JsxAttribute */) || (parent_18.kind === 247 /* JsxSpreadAttribute */))) {
-                                return parent_18.parent;
-                            }
-                            break;
-                        case 16 /* CloseBraceToken */:
-                            if (parent_18 &&
-                                parent_18.kind === 248 /* JsxExpression */ &&
-                                parent_18.parent &&
-                                (parent_18.parent.kind === 246 /* JsxAttribute */)) {
-                                return parent_18.parent.parent;
-                            }
-                            if (parent_18 && parent_18.kind === 247 /* JsxSpreadAttribute */) {
-                                return parent_18.parent;
-                            }
-                            break;
-                    }
-                }
-                return undefined;
-            }
-            function isFunction(kind) {
-                switch (kind) {
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                        return true;
-                }
-                return false;
-            }
-            /**
-             * @returns true if we are certain that the currently edited location must define a new location; false otherwise.
-             */
-            function isSolelyIdentifierDefinitionLocation(contextToken) {
-                var containingNodeKind = contextToken.parent.kind;
-                switch (contextToken.kind) {
-                    case 24 /* CommaToken */:
-                        return containingNodeKind === 218 /* VariableDeclaration */ ||
-                            containingNodeKind === 219 /* VariableDeclarationList */ ||
-                            containingNodeKind === 200 /* VariableStatement */ ||
-                            containingNodeKind === 224 /* EnumDeclaration */ ||
-                            isFunction(containingNodeKind) ||
-                            containingNodeKind === 221 /* ClassDeclaration */ ||
-                            containingNodeKind === 192 /* ClassExpression */ ||
-                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
-                            containingNodeKind === 168 /* ArrayBindingPattern */ ||
-                            containingNodeKind === 223 /* TypeAliasDeclaration */; // type Map, K, |
-                    case 21 /* DotToken */:
-                        return containingNodeKind === 168 /* ArrayBindingPattern */; // var [.|
-                    case 54 /* ColonToken */:
-                        return containingNodeKind === 169 /* BindingElement */; // var {x :html|
-                    case 19 /* OpenBracketToken */:
-                        return containingNodeKind === 168 /* ArrayBindingPattern */; // var [x|
-                    case 17 /* OpenParenToken */:
-                        return containingNodeKind === 252 /* CatchClause */ ||
-                            isFunction(containingNodeKind);
-                    case 15 /* OpenBraceToken */:
-                        return containingNodeKind === 224 /* EnumDeclaration */ ||
-                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
-                            containingNodeKind === 159 /* TypeLiteral */; // const x : { |
-                    case 23 /* SemicolonToken */:
-                        return containingNodeKind === 144 /* PropertySignature */ &&
-                            contextToken.parent && contextToken.parent.parent &&
-                            (contextToken.parent.parent.kind === 222 /* InterfaceDeclaration */ ||
-                                contextToken.parent.parent.kind === 159 /* TypeLiteral */); // const x : { a; |
-                    case 25 /* LessThanToken */:
-                        return containingNodeKind === 221 /* ClassDeclaration */ ||
-                            containingNodeKind === 192 /* ClassExpression */ ||
-                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
-                            containingNodeKind === 223 /* TypeAliasDeclaration */ ||
-                            isFunction(containingNodeKind);
-                    case 113 /* StaticKeyword */:
-                        return containingNodeKind === 145 /* PropertyDeclaration */;
-                    case 22 /* DotDotDotToken */:
-                        return containingNodeKind === 142 /* Parameter */ ||
-                            (contextToken.parent && contextToken.parent.parent &&
-                                contextToken.parent.parent.kind === 168 /* ArrayBindingPattern */); // var [...z|
-                    case 112 /* PublicKeyword */:
-                    case 110 /* PrivateKeyword */:
-                    case 111 /* ProtectedKeyword */:
-                        return containingNodeKind === 142 /* Parameter */;
-                    case 116 /* AsKeyword */:
-                        return containingNodeKind === 234 /* ImportSpecifier */ ||
-                            containingNodeKind === 238 /* ExportSpecifier */ ||
-                            containingNodeKind === 232 /* NamespaceImport */;
-                    case 73 /* ClassKeyword */:
-                    case 81 /* EnumKeyword */:
-                    case 107 /* InterfaceKeyword */:
-                    case 87 /* FunctionKeyword */:
-                    case 102 /* VarKeyword */:
-                    case 123 /* GetKeyword */:
-                    case 131 /* SetKeyword */:
-                    case 89 /* ImportKeyword */:
-                    case 108 /* LetKeyword */:
-                    case 74 /* ConstKeyword */:
-                    case 114 /* YieldKeyword */:
-                    case 134 /* TypeKeyword */:
-                        return true;
-                }
-                // Previous token may have been a keyword that was converted to an identifier.
-                switch (contextToken.getText()) {
-                    case "abstract":
-                    case "async":
-                    case "class":
-                    case "const":
-                    case "declare":
-                    case "enum":
-                    case "function":
-                    case "interface":
-                    case "let":
-                    case "private":
-                    case "protected":
-                    case "public":
-                    case "static":
-                    case "var":
-                    case "yield":
-                        return true;
-                }
-                return false;
-            }
-            function isDotOfNumericLiteral(contextToken) {
-                if (contextToken.kind === 8 /* NumericLiteral */) {
-                    var text = contextToken.getFullText();
-                    return text.charAt(text.length - 1) === ".";
-                }
-                return false;
-            }
-            /**
-             * Filters out completion suggestions for named imports or exports.
-             *
-             * @param exportsOfModule          The list of symbols which a module exposes.
-             * @param namedImportsOrExports    The list of existing import/export specifiers in the import/export clause.
-             *
-             * @returns Symbols to be suggested at an import/export clause, barring those whose named imports/exports
-             *          do not occur at the current position and have not otherwise been typed.
-             */
-            function filterNamedImportOrExportCompletionItems(exportsOfModule, namedImportsOrExports) {
-                var existingImportsOrExports = {};
-                for (var _i = 0, namedImportsOrExports_1 = namedImportsOrExports; _i < namedImportsOrExports_1.length; _i++) {
-                    var element = namedImportsOrExports_1[_i];
-                    // If this is the current item we are editing right now, do not filter it out
-                    if (element.getStart() <= position && position <= element.getEnd()) {
-                        continue;
-                    }
-                    var name_39 = element.propertyName || element.name;
-                    existingImportsOrExports[name_39.text] = true;
-                }
-                if (ts.isEmpty(existingImportsOrExports)) {
-                    return ts.filter(exportsOfModule, function (e) { return e.name !== "default"; });
-                }
-                return ts.filter(exportsOfModule, function (e) { return e.name !== "default" && !ts.lookUp(existingImportsOrExports, e.name); });
-            }
-            /**
-             * Filters out completion suggestions for named imports or exports.
-             *
-             * @returns Symbols to be suggested in an object binding pattern or object literal expression, barring those whose declarations
-             *          do not occur at the current position and have not otherwise been typed.
-             */
-            function filterObjectMembersList(contextualMemberSymbols, existingMembers) {
-                if (!existingMembers || existingMembers.length === 0) {
-                    return contextualMemberSymbols;
-                }
-                var existingMemberNames = {};
-                for (var _i = 0, existingMembers_1 = existingMembers; _i < existingMembers_1.length; _i++) {
-                    var m = existingMembers_1[_i];
-                    // Ignore omitted expressions for missing members
-                    if (m.kind !== 253 /* PropertyAssignment */ &&
-                        m.kind !== 254 /* ShorthandPropertyAssignment */ &&
-                        m.kind !== 169 /* BindingElement */ &&
-                        m.kind !== 147 /* MethodDeclaration */) {
-                        continue;
-                    }
-                    // If this is the current item we are editing right now, do not filter it out
-                    if (m.getStart() <= position && position <= m.getEnd()) {
-                        continue;
-                    }
-                    var existingName = void 0;
-                    if (m.kind === 169 /* BindingElement */ && m.propertyName) {
-                        // include only identifiers in completion list
-                        if (m.propertyName.kind === 69 /* Identifier */) {
-                            existingName = m.propertyName.text;
-                        }
-                    }
-                    else {
-                        // TODO(jfreeman): Account for computed property name
-                        // NOTE: if one only performs this step when m.name is an identifier,
-                        // things like '__proto__' are not filtered out.
-                        existingName = m.name.text;
-                    }
-                    existingMemberNames[existingName] = true;
-                }
-                return ts.filter(contextualMemberSymbols, function (m) { return !ts.lookUp(existingMemberNames, m.name); });
-            }
-            /**
-             * Filters out completion suggestions from 'symbols' according to existing JSX attributes.
-             *
-             * @returns Symbols to be suggested in a JSX element, barring those whose attributes
-             *          do not occur at the current position and have not otherwise been typed.
-             */
-            function filterJsxAttributes(symbols, attributes) {
-                var seenNames = {};
-                for (var _i = 0, attributes_1 = attributes; _i < attributes_1.length; _i++) {
-                    var attr = attributes_1[_i];
-                    // If this is the current item we are editing right now, do not filter it out
-                    if (attr.getStart() <= position && position <= attr.getEnd()) {
-                        continue;
-                    }
-                    if (attr.kind === 246 /* JsxAttribute */) {
-                        seenNames[attr.name.text] = true;
-                    }
-                }
-                return ts.filter(symbols, function (a) { return !ts.lookUp(seenNames, a.name); });
-            }
-        }
-        function getCompletionsAtPosition(fileName, position) {
-            synchronizeHostData();
-            var completionData = getCompletionData(fileName, position);
-            if (!completionData) {
-                return undefined;
-            }
-            var symbols = completionData.symbols, isMemberCompletion = completionData.isMemberCompletion, isNewIdentifierLocation = completionData.isNewIdentifierLocation, location = completionData.location, isJsDocTagName = completionData.isJsDocTagName;
-            if (isJsDocTagName) {
-                // If the current position is a jsDoc tag name, only tag names should be provided for completion
-                return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: getAllJsDocCompletionEntries() };
-            }
-            var sourceFile = getValidSourceFile(fileName);
-            var entries = [];
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                var uniqueNames = getCompletionEntriesFromSymbols(symbols, entries);
-                ts.addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames));
-            }
-            else {
-                if (!symbols || symbols.length === 0) {
-                    if (sourceFile.languageVariant === 1 /* JSX */ &&
-                        location.parent && location.parent.kind === 245 /* JsxClosingElement */) {
-                        // In the TypeScript JSX element, if such element is not defined. When users query for completion at closing tag,
-                        // instead of simply giving unknown value, the completion will return the tag-name of an associated opening-element.
-                        // For example:
-                        //     var x = <div> </ /*1*/>  completion list at "1" will contain "div" with type any
-                        var tagName = location.parent.parent.openingElement.tagName;
-                        entries.push({
-                            name: tagName.text,
-                            kind: undefined,
-                            kindModifiers: undefined,
-                            sortText: "0"
-                        });
-                    }
-                    else {
-                        return undefined;
-                    }
-                }
-                getCompletionEntriesFromSymbols(symbols, entries);
-            }
-            // Add keywords if this is not a member completion list
-            if (!isMemberCompletion && !isJsDocTagName) {
-                ts.addRange(entries, keywordCompletions);
-            }
-            return { isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries: entries };
-            function getJavaScriptCompletionEntries(sourceFile, position, uniqueNames) {
-                var entries = [];
-                var target = program.getCompilerOptions().target;
-                var nameTable = getNameTable(sourceFile);
-                for (var name_40 in nameTable) {
-                    // Skip identifiers produced only from the current location
-                    if (nameTable[name_40] === position) {
-                        continue;
-                    }
-                    if (!uniqueNames[name_40]) {
-                        uniqueNames[name_40] = name_40;
-                        var displayName = getCompletionEntryDisplayName(name_40, target, /*performCharacterChecks*/ true);
-                        if (displayName) {
-                            var entry = {
-                                name: displayName,
-                                kind: ScriptElementKind.warning,
-                                kindModifiers: "",
-                                sortText: "1"
-                            };
-                            entries.push(entry);
-                        }
-                    }
-                }
-                return entries;
-            }
-            function getAllJsDocCompletionEntries() {
-                return jsDocCompletionEntries || (jsDocCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
-                    return {
-                        name: tagName,
-                        kind: ScriptElementKind.keyword,
-                        kindModifiers: "",
-                        sortText: "0"
-                    };
-                }));
-            }
-            function createCompletionEntry(symbol, location) {
-                // Try to get a valid display name for this symbol, if we could not find one, then ignore it.
-                // We would like to only show things that can be added after a dot, so for instance numeric properties can
-                // not be accessed with a dot (a.1 <- invalid)
-                var displayName = getCompletionEntryDisplayNameForSymbol(symbol, program.getCompilerOptions().target, /*performCharacterChecks*/ true, location);
-                if (!displayName) {
-                    return undefined;
-                }
-                // TODO(drosen): Right now we just permit *all* semantic meanings when calling
-                // 'getSymbolKind' which is permissible given that it is backwards compatible; but
-                // really we should consider passing the meaning for the node so that we don't report
-                // that a suggestion for a value is an interface.  We COULD also just do what
-                // 'getSymbolModifiers' does, which is to use the first declaration.
-                // Use a 'sortText' of 0' so that all symbol completion entries come before any other
-                // entries (like JavaScript identifier entries).
-                return {
-                    name: displayName,
-                    kind: getSymbolKind(symbol, location),
-                    kindModifiers: getSymbolModifiers(symbol),
-                    sortText: "0"
-                };
-            }
-            function getCompletionEntriesFromSymbols(symbols, entries) {
-                var start = new Date().getTime();
-                var uniqueNames = {};
-                if (symbols) {
-                    for (var _i = 0, symbols_4 = symbols; _i < symbols_4.length; _i++) {
-                        var symbol = symbols_4[_i];
-                        var entry = createCompletionEntry(symbol, location);
-                        if (entry) {
-                            var id = ts.escapeIdentifier(entry.name);
-                            if (!ts.lookUp(uniqueNames, id)) {
-                                entries.push(entry);
-                                uniqueNames[id] = id;
-                            }
-                        }
-                    }
-                }
-                log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (new Date().getTime() - start));
-                return uniqueNames;
-            }
-        }
-        function getCompletionEntryDetails(fileName, position, entryName) {
-            synchronizeHostData();
-            // Compute all the completion symbols again.
-            var completionData = getCompletionData(fileName, position);
-            if (completionData) {
-                var symbols = completionData.symbols, location_2 = completionData.location;
-                // Find the symbol with the matching entry name.
-                var target_2 = program.getCompilerOptions().target;
-                // We don't need to perform character checks here because we're only comparing the
-                // name against 'entryName' (which is known to be good), not building a new
-                // completion entry.
-                var symbol = ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(s, target_2, /*performCharacterChecks*/ false, location_2) === entryName ? s : undefined; });
-                if (symbol) {
-                    var _a = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, getValidSourceFile(fileName), location_2, location_2, 7 /* All */), displayParts = _a.displayParts, documentation = _a.documentation, symbolKind = _a.symbolKind;
-                    return {
-                        name: entryName,
-                        kindModifiers: getSymbolModifiers(symbol),
-                        kind: symbolKind,
-                        displayParts: displayParts,
-                        documentation: documentation
-                    };
-                }
-            }
-            // Didn't find a symbol with this name.  See if we can find a keyword instead.
-            var keywordCompletion = ts.forEach(keywordCompletions, function (c) { return c.name === entryName; });
-            if (keywordCompletion) {
-                return {
-                    name: entryName,
-                    kind: ScriptElementKind.keyword,
-                    kindModifiers: ScriptElementKindModifier.none,
-                    displayParts: [ts.displayPart(entryName, SymbolDisplayPartKind.keyword)],
-                    documentation: undefined
-                };
-            }
-            return undefined;
-        }
-        // TODO(drosen): use contextual SemanticMeaning.
-        function getSymbolKind(symbol, location) {
-            var flags = symbol.getFlags();
-            if (flags & 32 /* Class */)
-                return ts.getDeclarationOfKind(symbol, 192 /* ClassExpression */) ?
-                    ScriptElementKind.localClassElement : ScriptElementKind.classElement;
-            if (flags & 384 /* Enum */)
-                return ScriptElementKind.enumElement;
-            if (flags & 524288 /* TypeAlias */)
-                return ScriptElementKind.typeElement;
-            if (flags & 64 /* Interface */)
-                return ScriptElementKind.interfaceElement;
-            if (flags & 262144 /* TypeParameter */)
-                return ScriptElementKind.typeParameterElement;
-            var result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location);
-            if (result === ScriptElementKind.unknown) {
-                if (flags & 262144 /* TypeParameter */)
-                    return ScriptElementKind.typeParameterElement;
-                if (flags & 8 /* EnumMember */)
-                    return ScriptElementKind.variableElement;
-                if (flags & 8388608 /* Alias */)
-                    return ScriptElementKind.alias;
-                if (flags & 1536 /* Module */)
-                    return ScriptElementKind.moduleElement;
-            }
-            return result;
-        }
-        function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location) {
-            var typeChecker = program.getTypeChecker();
-            if (typeChecker.isUndefinedSymbol(symbol)) {
-                return ScriptElementKind.variableElement;
-            }
-            if (typeChecker.isArgumentsSymbol(symbol)) {
-                return ScriptElementKind.localVariableElement;
-            }
-            if (location.kind === 97 /* ThisKeyword */ && ts.isExpression(location)) {
-                return ScriptElementKind.parameterElement;
-            }
-            if (flags & 3 /* Variable */) {
-                if (ts.isFirstDeclarationOfSymbolParameter(symbol)) {
-                    return ScriptElementKind.parameterElement;
-                }
-                else if (symbol.valueDeclaration && ts.isConst(symbol.valueDeclaration)) {
-                    return ScriptElementKind.constElement;
-                }
-                else if (ts.forEach(symbol.declarations, ts.isLet)) {
-                    return ScriptElementKind.letElement;
-                }
-                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localVariableElement : ScriptElementKind.variableElement;
-            }
-            if (flags & 16 /* Function */)
-                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localFunctionElement : ScriptElementKind.functionElement;
-            if (flags & 32768 /* GetAccessor */)
-                return ScriptElementKind.memberGetAccessorElement;
-            if (flags & 65536 /* SetAccessor */)
-                return ScriptElementKind.memberSetAccessorElement;
-            if (flags & 8192 /* Method */)
-                return ScriptElementKind.memberFunctionElement;
-            if (flags & 16384 /* Constructor */)
-                return ScriptElementKind.constructorImplementationElement;
-            if (flags & 4 /* Property */) {
-                if (flags & 268435456 /* SyntheticProperty */) {
-                    // If union property is result of union of non method (property/accessors/variables), it is labeled as property
-                    var unionPropertyKind = ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
-                        var rootSymbolFlags = rootSymbol.getFlags();
-                        if (rootSymbolFlags & (98308 /* PropertyOrAccessor */ | 3 /* Variable */)) {
-                            return ScriptElementKind.memberVariableElement;
-                        }
-                        ts.Debug.assert(!!(rootSymbolFlags & 8192 /* Method */));
-                    });
-                    if (!unionPropertyKind) {
-                        // If this was union of all methods,
-                        // make sure it has call signatures before we can label it as method
-                        var typeOfUnionProperty = typeChecker.getTypeOfSymbolAtLocation(symbol, location);
-                        if (typeOfUnionProperty.getCallSignatures().length) {
-                            return ScriptElementKind.memberFunctionElement;
-                        }
-                        return ScriptElementKind.memberVariableElement;
-                    }
-                    return unionPropertyKind;
-                }
-                return ScriptElementKind.memberVariableElement;
-            }
-            return ScriptElementKind.unknown;
-        }
-        function getSymbolModifiers(symbol) {
-            return symbol && symbol.declarations && symbol.declarations.length > 0
-                ? ts.getNodeModifiers(symbol.declarations[0])
-                : ScriptElementKindModifier.none;
-        }
-        // TODO(drosen): Currently completion entry details passes the SemanticMeaning.All instead of using semanticMeaning of location
-        function getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, enclosingDeclaration, location, semanticMeaning) {
-            if (semanticMeaning === void 0) { semanticMeaning = getMeaningFromLocation(location); }
-            var typeChecker = program.getTypeChecker();
-            var displayParts = [];
-            var documentation;
-            var symbolFlags = symbol.flags;
-            var symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, symbolFlags, location);
-            var hasAddedSymbolInfo;
-            var isThisExpression = location.kind === 97 /* ThisKeyword */ && ts.isExpression(location);
-            var type;
-            // Class at constructor site need to be shown as constructor apart from property,method, vars
-            if (symbolKind !== ScriptElementKind.unknown || symbolFlags & 32 /* Class */ || symbolFlags & 8388608 /* Alias */) {
-                // If it is accessor they are allowed only if location is at name of the accessor
-                if (symbolKind === ScriptElementKind.memberGetAccessorElement || symbolKind === ScriptElementKind.memberSetAccessorElement) {
-                    symbolKind = ScriptElementKind.memberVariableElement;
-                }
-                var signature = void 0;
-                type = isThisExpression ? typeChecker.getTypeAtLocation(location) : typeChecker.getTypeOfSymbolAtLocation(symbol, location);
-                if (type) {
-                    if (location.parent && location.parent.kind === 172 /* PropertyAccessExpression */) {
-                        var right = location.parent.name;
-                        // Either the location is on the right of a property access, or on the left and the right is missing
-                        if (right === location || (right && right.getFullWidth() === 0)) {
-                            location = location.parent;
-                        }
-                    }
-                    // try get the call/construct signature from the type if it matches
-                    var callExpression = void 0;
-                    if (location.kind === 174 /* CallExpression */ || location.kind === 175 /* NewExpression */) {
-                        callExpression = location;
-                    }
-                    else if (isCallExpressionTarget(location) || isNewExpressionTarget(location)) {
-                        callExpression = location.parent;
-                    }
-                    if (callExpression) {
-                        var candidateSignatures = [];
-                        signature = typeChecker.getResolvedSignature(callExpression, candidateSignatures);
-                        if (!signature && candidateSignatures.length) {
-                            // Use the first candidate:
-                            signature = candidateSignatures[0];
-                        }
-                        var useConstructSignatures = callExpression.kind === 175 /* NewExpression */ || callExpression.expression.kind === 95 /* SuperKeyword */;
-                        var allSignatures = useConstructSignatures ? type.getConstructSignatures() : type.getCallSignatures();
-                        if (!ts.contains(allSignatures, signature.target) && !ts.contains(allSignatures, signature)) {
-                            // Get the first signature if there is one -- allSignatures may contain
-                            // either the original signature or its target, so check for either
-                            signature = allSignatures.length ? allSignatures[0] : undefined;
-                        }
-                        if (signature) {
-                            if (useConstructSignatures && (symbolFlags & 32 /* Class */)) {
-                                // Constructor
-                                symbolKind = ScriptElementKind.constructorImplementationElement;
-                                addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
-                            }
-                            else if (symbolFlags & 8388608 /* Alias */) {
-                                symbolKind = ScriptElementKind.alias;
-                                pushTypePart(symbolKind);
-                                displayParts.push(ts.spacePart());
-                                if (useConstructSignatures) {
-                                    displayParts.push(ts.keywordPart(92 /* NewKeyword */));
-                                    displayParts.push(ts.spacePart());
-                                }
-                                addFullSymbolName(symbol);
-                            }
-                            else {
-                                addPrefixForAnyFunctionOrVar(symbol, symbolKind);
-                            }
-                            switch (symbolKind) {
-                                case ScriptElementKind.memberVariableElement:
-                                case ScriptElementKind.variableElement:
-                                case ScriptElementKind.constElement:
-                                case ScriptElementKind.letElement:
-                                case ScriptElementKind.parameterElement:
-                                case ScriptElementKind.localVariableElement:
-                                    // If it is call or construct signature of lambda's write type name
-                                    displayParts.push(ts.punctuationPart(54 /* ColonToken */));
-                                    displayParts.push(ts.spacePart());
-                                    if (useConstructSignatures) {
-                                        displayParts.push(ts.keywordPart(92 /* NewKeyword */));
-                                        displayParts.push(ts.spacePart());
-                                    }
-                                    if (!(type.flags & 65536 /* Anonymous */) && type.symbol) {
-                                        ts.addRange(displayParts, ts.symbolToDisplayParts(typeChecker, type.symbol, enclosingDeclaration, /*meaning*/ undefined, 1 /* WriteTypeParametersOrArguments */));
-                                    }
-                                    addSignatureDisplayParts(signature, allSignatures, 8 /* WriteArrowStyleSignature */);
-                                    break;
-                                default:
-                                    // Just signature
-                                    addSignatureDisplayParts(signature, allSignatures);
-                            }
-                            hasAddedSymbolInfo = true;
-                        }
-                    }
-                    else if ((isNameOfFunctionDeclaration(location) && !(symbol.flags & 98304 /* Accessor */)) ||
-                        (location.kind === 121 /* ConstructorKeyword */ && location.parent.kind === 148 /* Constructor */)) {
-                        // get the signature from the declaration and write it
-                        var functionDeclaration = location.parent;
-                        var allSignatures = functionDeclaration.kind === 148 /* Constructor */ ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
-                        if (!typeChecker.isImplementationOfOverload(functionDeclaration)) {
-                            signature = typeChecker.getSignatureFromDeclaration(functionDeclaration);
-                        }
-                        else {
-                            signature = allSignatures[0];
-                        }
-                        if (functionDeclaration.kind === 148 /* Constructor */) {
-                            // show (constructor) Type(...) signature
-                            symbolKind = ScriptElementKind.constructorImplementationElement;
-                            addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
-                        }
-                        else {
-                            // (function/method) symbol(..signature)
-                            addPrefixForAnyFunctionOrVar(functionDeclaration.kind === 151 /* CallSignature */ &&
-                                !(type.symbol.flags & 2048 /* TypeLiteral */ || type.symbol.flags & 4096 /* ObjectLiteral */) ? type.symbol : symbol, symbolKind);
-                        }
-                        addSignatureDisplayParts(signature, allSignatures);
-                        hasAddedSymbolInfo = true;
-                    }
-                }
-            }
-            if (symbolFlags & 32 /* Class */ && !hasAddedSymbolInfo && !isThisExpression) {
-                if (ts.getDeclarationOfKind(symbol, 192 /* ClassExpression */)) {
-                    // Special case for class expressions because we would like to indicate that
-                    // the class name is local to the class body (similar to function expression)
-                    //      (local class) class <className>
-                    pushTypePart(ScriptElementKind.localClassElement);
-                }
-                else {
-                    // Class declaration has name which is not local.
-                    displayParts.push(ts.keywordPart(73 /* ClassKeyword */));
-                }
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                writeTypeParametersOfSymbol(symbol, sourceFile);
-            }
-            if ((symbolFlags & 64 /* Interface */) && (semanticMeaning & 2 /* Type */)) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(107 /* InterfaceKeyword */));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                writeTypeParametersOfSymbol(symbol, sourceFile);
-            }
-            if (symbolFlags & 524288 /* TypeAlias */) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(134 /* TypeKeyword */));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                writeTypeParametersOfSymbol(symbol, sourceFile);
-                displayParts.push(ts.spacePart());
-                displayParts.push(ts.operatorPart(56 /* EqualsToken */));
-                displayParts.push(ts.spacePart());
-                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, typeChecker.getDeclaredTypeOfSymbol(symbol), enclosingDeclaration));
-            }
-            if (symbolFlags & 384 /* Enum */) {
-                addNewLineIfDisplayPartsExist();
-                if (ts.forEach(symbol.declarations, ts.isConstEnumDeclaration)) {
-                    displayParts.push(ts.keywordPart(74 /* ConstKeyword */));
-                    displayParts.push(ts.spacePart());
-                }
-                displayParts.push(ts.keywordPart(81 /* EnumKeyword */));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-            }
-            if (symbolFlags & 1536 /* Module */) {
-                addNewLineIfDisplayPartsExist();
-                var declaration = ts.getDeclarationOfKind(symbol, 225 /* ModuleDeclaration */);
-                var isNamespace = declaration && declaration.name && declaration.name.kind === 69 /* Identifier */;
-                displayParts.push(ts.keywordPart(isNamespace ? 126 /* NamespaceKeyword */ : 125 /* ModuleKeyword */));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-            }
-            if ((symbolFlags & 262144 /* TypeParameter */) && (semanticMeaning & 2 /* Type */)) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
-                displayParts.push(ts.textPart("type parameter"));
-                displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                displayParts.push(ts.spacePart());
-                displayParts.push(ts.keywordPart(90 /* InKeyword */));
-                displayParts.push(ts.spacePart());
-                if (symbol.parent) {
-                    // Class/Interface type parameter
-                    addFullSymbolName(symbol.parent, enclosingDeclaration);
-                    writeTypeParametersOfSymbol(symbol.parent, enclosingDeclaration);
-                }
-                else {
-                    // Method/function type parameter
-                    var declaration = ts.getDeclarationOfKind(symbol, 141 /* TypeParameter */);
-                    ts.Debug.assert(declaration !== undefined);
-                    declaration = declaration.parent;
-                    if (declaration) {
-                        if (ts.isFunctionLikeKind(declaration.kind)) {
-                            var signature = typeChecker.getSignatureFromDeclaration(declaration);
-                            if (declaration.kind === 152 /* ConstructSignature */) {
-                                displayParts.push(ts.keywordPart(92 /* NewKeyword */));
-                                displayParts.push(ts.spacePart());
-                            }
-                            else if (declaration.kind !== 151 /* CallSignature */ && declaration.name) {
-                                addFullSymbolName(declaration.symbol);
-                            }
-                            ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, sourceFile, 32 /* WriteTypeArgumentsOfSignature */));
-                        }
-                        else {
-                            // Type alias type parameter
-                            // For example
-                            //      type list<T> = T[];  // Both T will go through same code path
-                            displayParts.push(ts.keywordPart(134 /* TypeKeyword */));
-                            displayParts.push(ts.spacePart());
-                            addFullSymbolName(declaration.symbol);
-                            writeTypeParametersOfSymbol(declaration.symbol, sourceFile);
-                        }
-                    }
-                }
-            }
-            if (symbolFlags & 8 /* EnumMember */) {
-                addPrefixForAnyFunctionOrVar(symbol, "enum member");
-                var declaration = symbol.declarations[0];
-                if (declaration.kind === 255 /* EnumMember */) {
-                    var constantValue = typeChecker.getConstantValue(declaration);
-                    if (constantValue !== undefined) {
-                        displayParts.push(ts.spacePart());
-                        displayParts.push(ts.operatorPart(56 /* EqualsToken */));
-                        displayParts.push(ts.spacePart());
-                        displayParts.push(ts.displayPart(constantValue.toString(), SymbolDisplayPartKind.numericLiteral));
-                    }
-                }
-            }
-            if (symbolFlags & 8388608 /* Alias */) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(89 /* ImportKeyword */));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                ts.forEach(symbol.declarations, function (declaration) {
-                    if (declaration.kind === 229 /* ImportEqualsDeclaration */) {
-                        var importEqualsDeclaration = declaration;
-                        if (ts.isExternalModuleImportEqualsDeclaration(importEqualsDeclaration)) {
-                            displayParts.push(ts.spacePart());
-                            displayParts.push(ts.operatorPart(56 /* EqualsToken */));
-                            displayParts.push(ts.spacePart());
-                            displayParts.push(ts.keywordPart(129 /* RequireKeyword */));
-                            displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
-                            displayParts.push(ts.displayPart(ts.getTextOfNode(ts.getExternalModuleImportEqualsDeclarationExpression(importEqualsDeclaration)), SymbolDisplayPartKind.stringLiteral));
-                            displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
-                        }
-                        else {
-                            var internalAliasSymbol = typeChecker.getSymbolAtLocation(importEqualsDeclaration.moduleReference);
-                            if (internalAliasSymbol) {
-                                displayParts.push(ts.spacePart());
-                                displayParts.push(ts.operatorPart(56 /* EqualsToken */));
-                                displayParts.push(ts.spacePart());
-                                addFullSymbolName(internalAliasSymbol, enclosingDeclaration);
-                            }
-                        }
-                        return true;
-                    }
-                });
-            }
-            if (!hasAddedSymbolInfo) {
-                if (symbolKind !== ScriptElementKind.unknown) {
-                    if (type) {
-                        if (isThisExpression) {
-                            addNewLineIfDisplayPartsExist();
-                            displayParts.push(ts.keywordPart(97 /* ThisKeyword */));
-                        }
-                        else {
-                            addPrefixForAnyFunctionOrVar(symbol, symbolKind);
-                        }
-                        // For properties, variables and local vars: show the type
-                        if (symbolKind === ScriptElementKind.memberVariableElement ||
-                            symbolFlags & 3 /* Variable */ ||
-                            symbolKind === ScriptElementKind.localVariableElement ||
-                            isThisExpression) {
-                            displayParts.push(ts.punctuationPart(54 /* ColonToken */));
-                            displayParts.push(ts.spacePart());
-                            // If the type is type parameter, format it specially
-                            if (type.symbol && type.symbol.flags & 262144 /* TypeParameter */) {
-                                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
-                                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(type, writer, enclosingDeclaration);
-                                });
-                                ts.addRange(displayParts, typeParameterParts);
-                            }
-                            else {
-                                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, type, enclosingDeclaration));
-                            }
-                        }
-                        else if (symbolFlags & 16 /* Function */ ||
-                            symbolFlags & 8192 /* Method */ ||
-                            symbolFlags & 16384 /* Constructor */ ||
-                            symbolFlags & 131072 /* Signature */ ||
-                            symbolFlags & 98304 /* Accessor */ ||
-                            symbolKind === ScriptElementKind.memberFunctionElement) {
-                            var allSignatures = type.getNonNullableType().getCallSignatures();
-                            addSignatureDisplayParts(allSignatures[0], allSignatures);
-                        }
-                    }
-                }
-                else {
-                    symbolKind = getSymbolKind(symbol, location);
-                }
-            }
-            if (!documentation) {
-                documentation = symbol.getDocumentationComment();
-            }
-            return { displayParts: displayParts, documentation: documentation, symbolKind: symbolKind };
-            function addNewLineIfDisplayPartsExist() {
-                if (displayParts.length) {
-                    displayParts.push(ts.lineBreakPart());
-                }
-            }
-            function addFullSymbolName(symbol, enclosingDeclaration) {
-                var fullSymbolDisplayParts = ts.symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration || sourceFile, /*meaning*/ undefined, 1 /* WriteTypeParametersOrArguments */ | 2 /* UseOnlyExternalAliasing */);
-                ts.addRange(displayParts, fullSymbolDisplayParts);
-            }
-            function addPrefixForAnyFunctionOrVar(symbol, symbolKind) {
-                addNewLineIfDisplayPartsExist();
-                if (symbolKind) {
-                    pushTypePart(symbolKind);
-                    displayParts.push(ts.spacePart());
-                    addFullSymbolName(symbol);
-                }
-            }
-            function pushTypePart(symbolKind) {
-                switch (symbolKind) {
-                    case ScriptElementKind.variableElement:
-                    case ScriptElementKind.functionElement:
-                    case ScriptElementKind.letElement:
-                    case ScriptElementKind.constElement:
-                    case ScriptElementKind.constructorImplementationElement:
-                        displayParts.push(ts.textOrKeywordPart(symbolKind));
-                        return;
-                    default:
-                        displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
-                        displayParts.push(ts.textOrKeywordPart(symbolKind));
-                        displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
-                        return;
-                }
-            }
-            function addSignatureDisplayParts(signature, allSignatures, flags) {
-                ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, enclosingDeclaration, flags | 32 /* WriteTypeArgumentsOfSignature */));
-                if (allSignatures.length > 1) {
-                    displayParts.push(ts.spacePart());
-                    displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
-                    displayParts.push(ts.operatorPart(35 /* PlusToken */));
-                    displayParts.push(ts.displayPart((allSignatures.length - 1).toString(), SymbolDisplayPartKind.numericLiteral));
-                    displayParts.push(ts.spacePart());
-                    displayParts.push(ts.textPart(allSignatures.length === 2 ? "overload" : "overloads"));
-                    displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
-                }
-                documentation = signature.getDocumentationComment();
-            }
-            function writeTypeParametersOfSymbol(symbol, enclosingDeclaration) {
-                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
-                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration);
-                });
-                ts.addRange(displayParts, typeParameterParts);
-            }
-        }
-        function getQuickInfoAtPosition(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            if (isLabelName(node)) {
-                return undefined;
-            }
-            var typeChecker = program.getTypeChecker();
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol || typeChecker.isUnknownSymbol(symbol)) {
-                // Try getting just type at this position and show
-                switch (node.kind) {
-                    case 69 /* Identifier */:
-                    case 172 /* PropertyAccessExpression */:
-                    case 139 /* QualifiedName */:
-                    case 97 /* ThisKeyword */:
-                    case 165 /* ThisType */:
-                    case 95 /* SuperKeyword */:
-                        // For the identifiers/this/super etc get the type at position
-                        var type = typeChecker.getTypeAtLocation(node);
-                        if (type) {
-                            return {
-                                kind: ScriptElementKind.unknown,
-                                kindModifiers: ScriptElementKindModifier.none,
-                                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
-                                displayParts: ts.typeToDisplayParts(typeChecker, type, getContainerNode(node)),
-                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined
-                            };
-                        }
-                }
-                return undefined;
-            }
-            var displayPartsDocumentationsAndKind = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, getContainerNode(node), node);
-            return {
-                kind: displayPartsDocumentationsAndKind.symbolKind,
-                kindModifiers: getSymbolModifiers(symbol),
-                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
-                displayParts: displayPartsDocumentationsAndKind.displayParts,
-                documentation: displayPartsDocumentationsAndKind.documentation
-            };
-        }
-        function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
-            return {
-                fileName: node.getSourceFile().fileName,
-                textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
-                kind: symbolKind,
-                name: symbolName,
-                containerKind: undefined,
-                containerName: containerName
-            };
-        }
-        function getDefinitionFromSymbol(symbol, node) {
-            var typeChecker = program.getTypeChecker();
-            var result = [];
-            var declarations = symbol.getDeclarations();
-            var symbolName = typeChecker.symbolToString(symbol); // Do not get scoped name, just the name of the symbol
-            var symbolKind = getSymbolKind(symbol, node);
-            var containerSymbol = symbol.parent;
-            var containerName = containerSymbol ? typeChecker.symbolToString(containerSymbol, node) : "";
-            if (!tryAddConstructSignature(symbol, node, symbolKind, symbolName, containerName, result) &&
-                !tryAddCallSignature(symbol, node, symbolKind, symbolName, containerName, result)) {
-                // Just add all the declarations.
-                ts.forEach(declarations, function (declaration) {
-                    result.push(createDefinitionInfo(declaration, symbolKind, symbolName, containerName));
-                });
-            }
-            return result;
-            function tryAddConstructSignature(symbol, location, symbolKind, symbolName, containerName, result) {
-                // Applicable only if we are in a new expression, or we are on a constructor declaration
-                // and in either case the symbol has a construct signature definition, i.e. class
-                if (isNewExpressionTarget(location) || location.kind === 121 /* ConstructorKeyword */) {
-                    if (symbol.flags & 32 /* Class */) {
-                        // Find the first class-like declaration and try to get the construct signature.
-                        for (var _i = 0, _a = symbol.getDeclarations(); _i < _a.length; _i++) {
-                            var declaration = _a[_i];
-                            if (ts.isClassLike(declaration)) {
-                                return tryAddSignature(declaration.members, 
-                                /*selectConstructors*/ true, symbolKind, symbolName, containerName, result);
-                            }
-                        }
-                        ts.Debug.fail("Expected declaration to have at least one class-like declaration");
-                    }
-                }
-                return false;
-            }
-            function tryAddCallSignature(symbol, location, symbolKind, symbolName, containerName, result) {
-                if (isCallExpressionTarget(location) || isNewExpressionTarget(location) || isNameOfFunctionDeclaration(location)) {
-                    return tryAddSignature(symbol.declarations, /*selectConstructors*/ false, symbolKind, symbolName, containerName, result);
-                }
-                return false;
-            }
-            function tryAddSignature(signatureDeclarations, selectConstructors, symbolKind, symbolName, containerName, result) {
-                var declarations = [];
-                var definition;
-                ts.forEach(signatureDeclarations, function (d) {
-                    if ((selectConstructors && d.kind === 148 /* Constructor */) ||
-                        (!selectConstructors && (d.kind === 220 /* FunctionDeclaration */ || d.kind === 147 /* MethodDeclaration */ || d.kind === 146 /* MethodSignature */))) {
-                        declarations.push(d);
-                        if (d.body)
-                            definition = d;
-                    }
-                });
-                if (definition) {
-                    result.push(createDefinitionInfo(definition, symbolKind, symbolName, containerName));
-                    return true;
-                }
-                else if (declarations.length) {
-                    result.push(createDefinitionInfo(ts.lastOrUndefined(declarations), symbolKind, symbolName, containerName));
-                    return true;
-                }
-                return false;
-            }
-        }
-        function findReferenceInPosition(refs, pos) {
-            for (var _i = 0, refs_1 = refs; _i < refs_1.length; _i++) {
-                var ref = refs_1[_i];
-                if (ref.pos <= pos && pos < ref.end) {
-                    return ref;
-                }
-            }
-            return undefined;
-        }
-        function getDefinitionInfoForFileReference(name, targetFileName) {
-            return {
-                fileName: targetFileName,
-                textSpan: ts.createTextSpanFromBounds(0, 0),
-                kind: ScriptElementKind.scriptElement,
-                name: name,
-                containerName: undefined,
-                containerKind: undefined
-            };
-        }
-        /// Goto definition
-        function getDefinitionAtPosition(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            /// Triple slash reference comments
-            var comment = findReferenceInPosition(sourceFile.referencedFiles, position);
-            if (comment) {
-                var referenceFile = ts.tryResolveScriptReference(program, sourceFile, comment);
-                if (referenceFile) {
-                    return [getDefinitionInfoForFileReference(comment.fileName, referenceFile.fileName)];
-                }
-                return undefined;
-            }
-            // Type reference directives
-            var typeReferenceDirective = findReferenceInPosition(sourceFile.typeReferenceDirectives, position);
-            if (typeReferenceDirective) {
-                var referenceFile = ts.lookUp(program.getResolvedTypeReferenceDirectives(), typeReferenceDirective.fileName);
-                if (referenceFile && referenceFile.resolvedFileName) {
-                    return [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
-                }
-                return undefined;
-            }
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            // Labels
-            if (isJumpStatementTarget(node)) {
-                var labelName = node.text;
-                var label = getTargetLabel(node.parent, node.text);
-                return label ? [createDefinitionInfo(label, ScriptElementKind.label, labelName, /*containerName*/ undefined)] : undefined;
-            }
-            var typeChecker = program.getTypeChecker();
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            // Could not find a symbol e.g. node is string or number keyword,
-            // or the symbol was an internal symbol and does not have a declaration e.g. undefined symbol
-            if (!symbol) {
-                return undefined;
-            }
-            // If this is an alias, and the request came at the declaration location
-            // get the aliased symbol instead. This allows for goto def on an import e.g.
-            //   import {A, B} from "mod";
-            // to jump to the implementation directly.
-            if (symbol.flags & 8388608 /* Alias */) {
-                var declaration = symbol.declarations[0];
-                // Go to the original declaration for cases:
-                //
-                //   (1) when the aliased symbol was declared in the location(parent).
-                //   (2) when the aliased symbol is originating from a named import.
-                //
-                if (node.kind === 69 /* Identifier */ &&
-                    (node.parent === declaration ||
-                        (declaration.kind === 234 /* ImportSpecifier */ && declaration.parent && declaration.parent.kind === 233 /* NamedImports */))) {
-                    symbol = typeChecker.getAliasedSymbol(symbol);
-                }
-            }
-            // Because name in short-hand property assignment has two different meanings: property name and property value,
-            // using go-to-definition at such position should go to the variable declaration of the property value rather than
-            // go to the declaration of the property name (in this case stay at the same position). However, if go-to-definition
-            // is performed at the location of property access, we would like to go to definition of the property in the short-hand
-            // assignment. This case and others are handled by the following code.
-            if (node.parent.kind === 254 /* ShorthandPropertyAssignment */) {
-                var shorthandSymbol = typeChecker.getShorthandAssignmentValueSymbol(symbol.valueDeclaration);
-                if (!shorthandSymbol) {
-                    return [];
-                }
-                var shorthandDeclarations = shorthandSymbol.getDeclarations();
-                var shorthandSymbolKind_1 = getSymbolKind(shorthandSymbol, node);
-                var shorthandSymbolName_1 = typeChecker.symbolToString(shorthandSymbol);
-                var shorthandContainerName_1 = typeChecker.symbolToString(symbol.parent, node);
-                return ts.map(shorthandDeclarations, function (declaration) { return createDefinitionInfo(declaration, shorthandSymbolKind_1, shorthandSymbolName_1, shorthandContainerName_1); });
-            }
-            return getDefinitionFromSymbol(symbol, node);
-        }
-        /// Goto type
-        function getTypeDefinitionAtPosition(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            var typeChecker = program.getTypeChecker();
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol) {
-                return undefined;
-            }
-            var type = typeChecker.getTypeOfSymbolAtLocation(symbol, node);
-            if (!type) {
-                return undefined;
-            }
-            if (type.flags & 16384 /* Union */) {
-                var result_3 = [];
-                ts.forEach(type.types, function (t) {
-                    if (t.symbol) {
-                        ts.addRange(/*to*/ result_3, /*from*/ getDefinitionFromSymbol(t.symbol, node));
-                    }
-                });
-                return result_3;
-            }
-            if (!type.symbol) {
-                return undefined;
-            }
-            return getDefinitionFromSymbol(type.symbol, node);
-        }
-        function getOccurrencesAtPosition(fileName, position) {
-            var results = getOccurrencesAtPositionCore(fileName, position);
-            if (results) {
-                var sourceFile_2 = getCanonicalFileName(ts.normalizeSlashes(fileName));
-                // Get occurrences only supports reporting occurrences for the file queried.  So
-                // filter down to that list.
-                results = ts.filter(results, function (r) { return getCanonicalFileName(ts.normalizeSlashes(r.fileName)) === sourceFile_2; });
-            }
-            return results;
-        }
-        function getDocumentHighlights(fileName, position, filesToSearch) {
-            synchronizeHostData();
-            var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingWord(sourceFile, position);
-            if (!node) {
-                return undefined;
-            }
-            return getSemanticDocumentHighlights(node) || getSyntacticDocumentHighlights(node);
-            function getHighlightSpanForNode(node) {
-                var start = node.getStart();
-                var end = node.getEnd();
-                return {
-                    fileName: sourceFile.fileName,
-                    textSpan: ts.createTextSpanFromBounds(start, end),
-                    kind: HighlightSpanKind.none
-                };
-            }
-            function getSemanticDocumentHighlights(node) {
-                if (node.kind === 69 /* Identifier */ ||
-                    node.kind === 97 /* ThisKeyword */ ||
-                    node.kind === 165 /* ThisType */ ||
-                    node.kind === 95 /* SuperKeyword */ ||
-                    node.kind === 9 /* StringLiteral */ ||
-                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                    var referencedSymbols = getReferencedSymbolsForNode(node, sourceFilesToSearch, /*findInStrings*/ false, /*findInComments*/ false);
-                    return convertReferencedSymbols(referencedSymbols);
-                }
-                return undefined;
-                function convertReferencedSymbols(referencedSymbols) {
-                    if (!referencedSymbols) {
-                        return undefined;
-                    }
-                    var fileNameToDocumentHighlights = {};
-                    var result = [];
-                    for (var _i = 0, referencedSymbols_1 = referencedSymbols; _i < referencedSymbols_1.length; _i++) {
-                        var referencedSymbol = referencedSymbols_1[_i];
-                        for (var _a = 0, _b = referencedSymbol.references; _a < _b.length; _a++) {
-                            var referenceEntry = _b[_a];
-                            var fileName_1 = referenceEntry.fileName;
-                            var documentHighlights = ts.getProperty(fileNameToDocumentHighlights, fileName_1);
-                            if (!documentHighlights) {
-                                documentHighlights = { fileName: fileName_1, highlightSpans: [] };
-                                fileNameToDocumentHighlights[fileName_1] = documentHighlights;
-                                result.push(documentHighlights);
-                            }
-                            documentHighlights.highlightSpans.push({
-                                textSpan: referenceEntry.textSpan,
-                                kind: referenceEntry.isWriteAccess ? HighlightSpanKind.writtenReference : HighlightSpanKind.reference
-                            });
-                        }
-                    }
-                    return result;
-                }
-            }
-            function getSyntacticDocumentHighlights(node) {
-                var fileName = sourceFile.fileName;
-                var highlightSpans = getHighlightSpans(node);
-                if (!highlightSpans || highlightSpans.length === 0) {
-                    return undefined;
-                }
-                return [{ fileName: fileName, highlightSpans: highlightSpans }];
-                // returns true if 'node' is defined and has a matching 'kind'.
-                function hasKind(node, kind) {
-                    return node !== undefined && node.kind === kind;
-                }
-                // Null-propagating 'parent' function.
-                function parent(node) {
-                    return node && node.parent;
-                }
-                function getHighlightSpans(node) {
-                    if (node) {
-                        switch (node.kind) {
-                            case 88 /* IfKeyword */:
-                            case 80 /* ElseKeyword */:
-                                if (hasKind(node.parent, 203 /* IfStatement */)) {
-                                    return getIfElseOccurrences(node.parent);
-                                }
-                                break;
-                            case 94 /* ReturnKeyword */:
-                                if (hasKind(node.parent, 211 /* ReturnStatement */)) {
-                                    return getReturnOccurrences(node.parent);
-                                }
-                                break;
-                            case 98 /* ThrowKeyword */:
-                                if (hasKind(node.parent, 215 /* ThrowStatement */)) {
-                                    return getThrowOccurrences(node.parent);
-                                }
-                                break;
-                            case 72 /* CatchKeyword */:
-                                if (hasKind(parent(parent(node)), 216 /* TryStatement */)) {
-                                    return getTryCatchFinallyOccurrences(node.parent.parent);
-                                }
-                                break;
-                            case 100 /* TryKeyword */:
-                            case 85 /* FinallyKeyword */:
-                                if (hasKind(parent(node), 216 /* TryStatement */)) {
-                                    return getTryCatchFinallyOccurrences(node.parent);
-                                }
-                                break;
-                            case 96 /* SwitchKeyword */:
-                                if (hasKind(node.parent, 213 /* SwitchStatement */)) {
-                                    return getSwitchCaseDefaultOccurrences(node.parent);
-                                }
-                                break;
-                            case 71 /* CaseKeyword */:
-                            case 77 /* DefaultKeyword */:
-                                if (hasKind(parent(parent(parent(node))), 213 /* SwitchStatement */)) {
-                                    return getSwitchCaseDefaultOccurrences(node.parent.parent.parent);
-                                }
-                                break;
-                            case 70 /* BreakKeyword */:
-                            case 75 /* ContinueKeyword */:
-                                if (hasKind(node.parent, 210 /* BreakStatement */) || hasKind(node.parent, 209 /* ContinueStatement */)) {
-                                    return getBreakOrContinueStatementOccurrences(node.parent);
-                                }
-                                break;
-                            case 86 /* ForKeyword */:
-                                if (hasKind(node.parent, 206 /* ForStatement */) ||
-                                    hasKind(node.parent, 207 /* ForInStatement */) ||
-                                    hasKind(node.parent, 208 /* ForOfStatement */)) {
-                                    return getLoopBreakContinueOccurrences(node.parent);
-                                }
-                                break;
-                            case 104 /* WhileKeyword */:
-                            case 79 /* DoKeyword */:
-                                if (hasKind(node.parent, 205 /* WhileStatement */) || hasKind(node.parent, 204 /* DoStatement */)) {
-                                    return getLoopBreakContinueOccurrences(node.parent);
-                                }
-                                break;
-                            case 121 /* ConstructorKeyword */:
-                                if (hasKind(node.parent, 148 /* Constructor */)) {
-                                    return getConstructorOccurrences(node.parent);
-                                }
-                                break;
-                            case 123 /* GetKeyword */:
-                            case 131 /* SetKeyword */:
-                                if (hasKind(node.parent, 149 /* GetAccessor */) || hasKind(node.parent, 150 /* SetAccessor */)) {
-                                    return getGetAndSetOccurrences(node.parent);
-                                }
-                                break;
-                            default:
-                                if (ts.isModifierKind(node.kind) && node.parent &&
-                                    (ts.isDeclaration(node.parent) || node.parent.kind === 200 /* VariableStatement */)) {
-                                    return getModifierOccurrences(node.kind, node.parent);
-                                }
-                        }
-                    }
-                    return undefined;
-                }
-                /**
-                 * Aggregates all throw-statements within this node *without* crossing
-                 * into function boundaries and try-blocks with catch-clauses.
-                 */
-                function aggregateOwnedThrowStatements(node) {
-                    var statementAccumulator = [];
-                    aggregate(node);
-                    return statementAccumulator;
-                    function aggregate(node) {
-                        if (node.kind === 215 /* ThrowStatement */) {
-                            statementAccumulator.push(node);
-                        }
-                        else if (node.kind === 216 /* TryStatement */) {
-                            var tryStatement = node;
-                            if (tryStatement.catchClause) {
-                                aggregate(tryStatement.catchClause);
-                            }
-                            else {
-                                // Exceptions thrown within a try block lacking a catch clause
-                                // are "owned" in the current context.
-                                aggregate(tryStatement.tryBlock);
-                            }
-                            if (tryStatement.finallyBlock) {
-                                aggregate(tryStatement.finallyBlock);
-                            }
-                        }
-                        else if (!ts.isFunctionLike(node)) {
-                            ts.forEachChild(node, aggregate);
-                        }
-                    }
-                }
-                /**
-                 * For lack of a better name, this function takes a throw statement and returns the
-                 * nearest ancestor that is a try-block (whose try statement has a catch clause),
-                 * function-block, or source file.
-                 */
-                function getThrowStatementOwner(throwStatement) {
-                    var child = throwStatement;
-                    while (child.parent) {
-                        var parent_19 = child.parent;
-                        if (ts.isFunctionBlock(parent_19) || parent_19.kind === 256 /* SourceFile */) {
-                            return parent_19;
-                        }
-                        // A throw-statement is only owned by a try-statement if the try-statement has
-                        // a catch clause, and if the throw-statement occurs within the try block.
-                        if (parent_19.kind === 216 /* TryStatement */) {
-                            var tryStatement = parent_19;
-                            if (tryStatement.tryBlock === child && tryStatement.catchClause) {
-                                return child;
-                            }
-                        }
-                        child = parent_19;
-                    }
-                    return undefined;
-                }
-                function aggregateAllBreakAndContinueStatements(node) {
-                    var statementAccumulator = [];
-                    aggregate(node);
-                    return statementAccumulator;
-                    function aggregate(node) {
-                        if (node.kind === 210 /* BreakStatement */ || node.kind === 209 /* ContinueStatement */) {
-                            statementAccumulator.push(node);
-                        }
-                        else if (!ts.isFunctionLike(node)) {
-                            ts.forEachChild(node, aggregate);
-                        }
-                    }
-                }
-                function ownsBreakOrContinueStatement(owner, statement) {
-                    var actualOwner = getBreakOrContinueOwner(statement);
-                    return actualOwner && actualOwner === owner;
-                }
-                function getBreakOrContinueOwner(statement) {
-                    for (var node_1 = statement.parent; node_1; node_1 = node_1.parent) {
-                        switch (node_1.kind) {
-                            case 213 /* SwitchStatement */:
-                                if (statement.kind === 209 /* ContinueStatement */) {
-                                    continue;
-                                }
-                            // Fall through.
-                            case 206 /* ForStatement */:
-                            case 207 /* ForInStatement */:
-                            case 208 /* ForOfStatement */:
-                            case 205 /* WhileStatement */:
-                            case 204 /* DoStatement */:
-                                if (!statement.label || isLabeledBy(node_1, statement.label.text)) {
-                                    return node_1;
-                                }
-                                break;
-                            default:
-                                // Don't cross function boundaries.
-                                if (ts.isFunctionLike(node_1)) {
-                                    return undefined;
-                                }
-                                break;
-                        }
-                    }
-                    return undefined;
-                }
-                function getModifierOccurrences(modifier, declaration) {
-                    var container = declaration.parent;
-                    // Make sure we only highlight the keyword when it makes sense to do so.
-                    if (ts.isAccessibilityModifier(modifier)) {
-                        if (!(container.kind === 221 /* ClassDeclaration */ ||
-                            container.kind === 192 /* ClassExpression */ ||
-                            (declaration.kind === 142 /* Parameter */ && hasKind(container, 148 /* Constructor */)))) {
-                            return undefined;
-                        }
-                    }
-                    else if (modifier === 113 /* StaticKeyword */) {
-                        if (!(container.kind === 221 /* ClassDeclaration */ || container.kind === 192 /* ClassExpression */)) {
-                            return undefined;
-                        }
-                    }
-                    else if (modifier === 82 /* ExportKeyword */ || modifier === 122 /* DeclareKeyword */) {
-                        if (!(container.kind === 226 /* ModuleBlock */ || container.kind === 256 /* SourceFile */)) {
-                            return undefined;
-                        }
-                    }
-                    else if (modifier === 115 /* AbstractKeyword */) {
-                        if (!(container.kind === 221 /* ClassDeclaration */ || declaration.kind === 221 /* ClassDeclaration */)) {
-                            return undefined;
-                        }
-                    }
-                    else {
-                        // unsupported modifier
-                        return undefined;
-                    }
-                    var keywords = [];
-                    var modifierFlag = getFlagFromModifier(modifier);
-                    var nodes;
-                    switch (container.kind) {
-                        case 226 /* ModuleBlock */:
-                        case 256 /* SourceFile */:
-                            // Container is either a class declaration or the declaration is a classDeclaration
-                            if (modifierFlag & 128 /* Abstract */) {
-                                nodes = declaration.members.concat(declaration);
-                            }
-                            else {
-                                nodes = container.statements;
-                            }
-                            break;
-                        case 148 /* Constructor */:
-                            nodes = container.parameters.concat(container.parent.members);
-                            break;
-                        case 221 /* ClassDeclaration */:
-                        case 192 /* ClassExpression */:
-                            nodes = container.members;
-                            // If we're an accessibility modifier, we're in an instance member and should search
-                            // the constructor's parameter list for instance members as well.
-                            if (modifierFlag & 28 /* AccessibilityModifier */) {
-                                var constructor = ts.forEach(container.members, function (member) {
-                                    return member.kind === 148 /* Constructor */ && member;
-                                });
-                                if (constructor) {
-                                    nodes = nodes.concat(constructor.parameters);
-                                }
-                            }
-                            else if (modifierFlag & 128 /* Abstract */) {
-                                nodes = nodes.concat(container);
-                            }
-                            break;
-                        default:
-                            ts.Debug.fail("Invalid container kind.");
-                    }
-                    ts.forEach(nodes, function (node) {
-                        if (node.modifiers && node.flags & modifierFlag) {
-                            ts.forEach(node.modifiers, function (child) { return pushKeywordIf(keywords, child, modifier); });
-                        }
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                    function getFlagFromModifier(modifier) {
-                        switch (modifier) {
-                            case 112 /* PublicKeyword */:
-                                return 4 /* Public */;
-                            case 110 /* PrivateKeyword */:
-                                return 8 /* Private */;
-                            case 111 /* ProtectedKeyword */:
-                                return 16 /* Protected */;
-                            case 113 /* StaticKeyword */:
-                                return 32 /* Static */;
-                            case 82 /* ExportKeyword */:
-                                return 1 /* Export */;
-                            case 122 /* DeclareKeyword */:
-                                return 2 /* Ambient */;
-                            case 115 /* AbstractKeyword */:
-                                return 128 /* Abstract */;
-                            default:
-                                ts.Debug.fail();
-                        }
-                    }
-                }
-                function pushKeywordIf(keywordList, token) {
-                    var expected = [];
-                    for (var _i = 2; _i < arguments.length; _i++) {
-                        expected[_i - 2] = arguments[_i];
-                    }
-                    if (token && ts.contains(expected, token.kind)) {
-                        keywordList.push(token);
-                        return true;
-                    }
-                    return false;
-                }
-                function getGetAndSetOccurrences(accessorDeclaration) {
-                    var keywords = [];
-                    tryPushAccessorKeyword(accessorDeclaration.symbol, 149 /* GetAccessor */);
-                    tryPushAccessorKeyword(accessorDeclaration.symbol, 150 /* SetAccessor */);
-                    return ts.map(keywords, getHighlightSpanForNode);
-                    function tryPushAccessorKeyword(accessorSymbol, accessorKind) {
-                        var accessor = ts.getDeclarationOfKind(accessorSymbol, accessorKind);
-                        if (accessor) {
-                            ts.forEach(accessor.getChildren(), function (child) { return pushKeywordIf(keywords, child, 123 /* GetKeyword */, 131 /* SetKeyword */); });
-                        }
-                    }
-                }
-                function getConstructorOccurrences(constructorDeclaration) {
-                    var declarations = constructorDeclaration.symbol.getDeclarations();
-                    var keywords = [];
-                    ts.forEach(declarations, function (declaration) {
-                        ts.forEach(declaration.getChildren(), function (token) {
-                            return pushKeywordIf(keywords, token, 121 /* ConstructorKeyword */);
-                        });
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getLoopBreakContinueOccurrences(loopNode) {
-                    var keywords = [];
-                    if (pushKeywordIf(keywords, loopNode.getFirstToken(), 86 /* ForKeyword */, 104 /* WhileKeyword */, 79 /* DoKeyword */)) {
-                        // If we succeeded and got a do-while loop, then start looking for a 'while' keyword.
-                        if (loopNode.kind === 204 /* DoStatement */) {
-                            var loopTokens = loopNode.getChildren();
-                            for (var i = loopTokens.length - 1; i >= 0; i--) {
-                                if (pushKeywordIf(keywords, loopTokens[i], 104 /* WhileKeyword */)) {
-                                    break;
-                                }
-                            }
-                        }
-                    }
-                    var breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
-                    ts.forEach(breaksAndContinues, function (statement) {
-                        if (ownsBreakOrContinueStatement(loopNode, statement)) {
-                            pushKeywordIf(keywords, statement.getFirstToken(), 70 /* BreakKeyword */, 75 /* ContinueKeyword */);
-                        }
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getBreakOrContinueStatementOccurrences(breakOrContinueStatement) {
-                    var owner = getBreakOrContinueOwner(breakOrContinueStatement);
-                    if (owner) {
-                        switch (owner.kind) {
-                            case 206 /* ForStatement */:
-                            case 207 /* ForInStatement */:
-                            case 208 /* ForOfStatement */:
-                            case 204 /* DoStatement */:
-                            case 205 /* WhileStatement */:
-                                return getLoopBreakContinueOccurrences(owner);
-                            case 213 /* SwitchStatement */:
-                                return getSwitchCaseDefaultOccurrences(owner);
-                        }
-                    }
-                    return undefined;
-                }
-                function getSwitchCaseDefaultOccurrences(switchStatement) {
-                    var keywords = [];
-                    pushKeywordIf(keywords, switchStatement.getFirstToken(), 96 /* SwitchKeyword */);
-                    // Go through each clause in the switch statement, collecting the 'case'/'default' keywords.
-                    ts.forEach(switchStatement.caseBlock.clauses, function (clause) {
-                        pushKeywordIf(keywords, clause.getFirstToken(), 71 /* CaseKeyword */, 77 /* DefaultKeyword */);
-                        var breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
-                        ts.forEach(breaksAndContinues, function (statement) {
-                            if (ownsBreakOrContinueStatement(switchStatement, statement)) {
-                                pushKeywordIf(keywords, statement.getFirstToken(), 70 /* BreakKeyword */);
-                            }
-                        });
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getTryCatchFinallyOccurrences(tryStatement) {
-                    var keywords = [];
-                    pushKeywordIf(keywords, tryStatement.getFirstToken(), 100 /* TryKeyword */);
-                    if (tryStatement.catchClause) {
-                        pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), 72 /* CatchKeyword */);
-                    }
-                    if (tryStatement.finallyBlock) {
-                        var finallyKeyword = ts.findChildOfKind(tryStatement, 85 /* FinallyKeyword */, sourceFile);
-                        pushKeywordIf(keywords, finallyKeyword, 85 /* FinallyKeyword */);
-                    }
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getThrowOccurrences(throwStatement) {
-                    var owner = getThrowStatementOwner(throwStatement);
-                    if (!owner) {
-                        return undefined;
-                    }
-                    var keywords = [];
-                    ts.forEach(aggregateOwnedThrowStatements(owner), function (throwStatement) {
-                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98 /* ThrowKeyword */);
-                    });
-                    // If the "owner" is a function, then we equate 'return' and 'throw' statements in their
-                    // ability to "jump out" of the function, and include occurrences for both.
-                    if (ts.isFunctionBlock(owner)) {
-                        ts.forEachReturnStatement(owner, function (returnStatement) {
-                            pushKeywordIf(keywords, returnStatement.getFirstToken(), 94 /* ReturnKeyword */);
-                        });
-                    }
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getReturnOccurrences(returnStatement) {
-                    var func = ts.getContainingFunction(returnStatement);
-                    // If we didn't find a containing function with a block body, bail out.
-                    if (!(func && hasKind(func.body, 199 /* Block */))) {
-                        return undefined;
-                    }
-                    var keywords = [];
-                    ts.forEachReturnStatement(func.body, function (returnStatement) {
-                        pushKeywordIf(keywords, returnStatement.getFirstToken(), 94 /* ReturnKeyword */);
-                    });
-                    // Include 'throw' statements that do not occur within a try block.
-                    ts.forEach(aggregateOwnedThrowStatements(func.body), function (throwStatement) {
-                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98 /* ThrowKeyword */);
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getIfElseOccurrences(ifStatement) {
-                    var keywords = [];
-                    // Traverse upwards through all parent if-statements linked by their else-branches.
-                    while (hasKind(ifStatement.parent, 203 /* IfStatement */) && ifStatement.parent.elseStatement === ifStatement) {
-                        ifStatement = ifStatement.parent;
-                    }
-                    // Now traverse back down through the else branches, aggregating if/else keywords of if-statements.
-                    while (ifStatement) {
-                        var children = ifStatement.getChildren();
-                        pushKeywordIf(keywords, children[0], 88 /* IfKeyword */);
-                        // Generally the 'else' keyword is second-to-last, so we traverse backwards.
-                        for (var i = children.length - 1; i >= 0; i--) {
-                            if (pushKeywordIf(keywords, children[i], 80 /* ElseKeyword */)) {
-                                break;
-                            }
-                        }
-                        if (!hasKind(ifStatement.elseStatement, 203 /* IfStatement */)) {
-                            break;
-                        }
-                        ifStatement = ifStatement.elseStatement;
-                    }
-                    var result = [];
-                    // We'd like to highlight else/ifs together if they are only separated by whitespace
-                    // (i.e. the keywords are separated by no comments, no newlines).
-                    for (var i = 0; i < keywords.length; i++) {
-                        if (keywords[i].kind === 80 /* ElseKeyword */ && i < keywords.length - 1) {
-                            var elseKeyword = keywords[i];
-                            var ifKeyword = keywords[i + 1]; // this *should* always be an 'if' keyword.
-                            var shouldCombindElseAndIf = true;
-                            // Avoid recalculating getStart() by iterating backwards.
-                            for (var j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
-                                if (!ts.isWhiteSpace(sourceFile.text.charCodeAt(j))) {
-                                    shouldCombindElseAndIf = false;
-                                    break;
-                                }
-                            }
-                            if (shouldCombindElseAndIf) {
-                                result.push({
-                                    fileName: fileName,
-                                    textSpan: ts.createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
-                                    kind: HighlightSpanKind.reference
-                                });
-                                i++; // skip the next keyword
-                                continue;
-                            }
-                        }
-                        // Ordinary case: just highlight the keyword.
-                        result.push(getHighlightSpanForNode(keywords[i]));
-                    }
-                    return result;
-                }
-            }
-        }
-        /// References and Occurrences
-        function getOccurrencesAtPositionCore(fileName, position) {
-            synchronizeHostData();
-            return convertDocumentHighlights(getDocumentHighlights(fileName, position, [fileName]));
-            function convertDocumentHighlights(documentHighlights) {
-                if (!documentHighlights) {
-                    return undefined;
-                }
-                var result = [];
-                for (var _i = 0, documentHighlights_1 = documentHighlights; _i < documentHighlights_1.length; _i++) {
-                    var entry = documentHighlights_1[_i];
-                    for (var _a = 0, _b = entry.highlightSpans; _a < _b.length; _a++) {
-                        var highlightSpan = _b[_a];
-                        result.push({
-                            fileName: entry.fileName,
-                            textSpan: highlightSpan.textSpan,
-                            isWriteAccess: highlightSpan.kind === HighlightSpanKind.writtenReference
-                        });
-                    }
-                }
-                return result;
-            }
-        }
-        function convertReferences(referenceSymbols) {
-            if (!referenceSymbols) {
-                return undefined;
-            }
-            var referenceEntries = [];
-            for (var _i = 0, referenceSymbols_1 = referenceSymbols; _i < referenceSymbols_1.length; _i++) {
-                var referenceSymbol = referenceSymbols_1[_i];
-                ts.addRange(referenceEntries, referenceSymbol.references);
-            }
-            return referenceEntries;
-        }
-        function findRenameLocations(fileName, position, findInStrings, findInComments) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, findInStrings, findInComments);
-            return convertReferences(referencedSymbols);
-        }
-        function getReferencesAtPosition(fileName, position) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
-            return convertReferences(referencedSymbols);
-        }
-        function findReferences(fileName, position) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
-            // Only include referenced symbols that have a valid definition.
-            return ts.filter(referencedSymbols, function (rs) { return !!rs.definition; });
-        }
-        function findReferencedSymbols(fileName, position, findInStrings, findInComments) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            if (node.kind !== 69 /* Identifier */ &&
-                // TODO (drosen): This should be enabled in a later release - currently breaks rename.
-                // node.kind !== SyntaxKind.ThisKeyword &&
-                // node.kind !== SyntaxKind.SuperKeyword &&
-                node.kind !== 9 /* StringLiteral */ &&
-                !isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                return undefined;
-            }
-            ts.Debug.assert(node.kind === 69 /* Identifier */ || node.kind === 8 /* NumericLiteral */ || node.kind === 9 /* StringLiteral */);
-            return getReferencedSymbolsForNode(node, program.getSourceFiles(), findInStrings, findInComments);
-        }
-        function getReferencedSymbolsForNode(node, sourceFiles, findInStrings, findInComments) {
-            var typeChecker = program.getTypeChecker();
-            // Labels
-            if (isLabelName(node)) {
-                if (isJumpStatementTarget(node)) {
-                    var labelDefinition = getTargetLabel(node.parent, node.text);
-                    // if we have a label definition, look within its statement for references, if not, then
-                    // the label is undefined and we have no results..
-                    return labelDefinition ? getLabelReferencesInNode(labelDefinition.parent, labelDefinition) : undefined;
-                }
-                else {
-                    // it is a label definition and not a target, search within the parent labeledStatement
-                    return getLabelReferencesInNode(node.parent, node);
-                }
-            }
-            if (node.kind === 97 /* ThisKeyword */ || node.kind === 165 /* ThisType */) {
-                return getReferencesForThisKeyword(node, sourceFiles);
-            }
-            if (node.kind === 95 /* SuperKeyword */) {
-                return getReferencesForSuperKeyword(node);
-            }
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol && node.kind === 9 /* StringLiteral */) {
-                return getReferencesForStringLiteral(node, sourceFiles);
-            }
-            // Could not find a symbol e.g. unknown identifier
-            if (!symbol) {
-                // Can't have references to something that we have no symbol for.
-                return undefined;
-            }
-            var declarations = symbol.declarations;
-            // The symbol was an internal symbol and does not have a declaration e.g. undefined symbol
-            if (!declarations || !declarations.length) {
-                return undefined;
-            }
-            var result;
-            // Compute the meaning from the location and the symbol it references
-            var searchMeaning = getIntersectingMeaningFromDeclarations(getMeaningFromLocation(node), declarations);
-            // Get the text to search for.
-            // Note: if this is an external module symbol, the name doesn't include quotes.
-            var declaredName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
-            // Try to get the smallest valid scope that we can limit our search to;
-            // otherwise we'll need to search globally (i.e. include each file).
-            var scope = getSymbolScope(symbol);
-            // Maps from a symbol ID to the ReferencedSymbol entry in 'result'.
-            var symbolToIndex = [];
-            if (scope) {
-                result = [];
-                getReferencesInNode(scope, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
-            }
-            else {
-                var internedName = getInternedName(symbol, node, declarations);
-                for (var _i = 0, sourceFiles_4 = sourceFiles; _i < sourceFiles_4.length; _i++) {
-                    var sourceFile = sourceFiles_4[_i];
-                    cancellationToken.throwIfCancellationRequested();
-                    var nameTable = getNameTable(sourceFile);
-                    if (ts.lookUp(nameTable, internedName) !== undefined) {
-                        result = result || [];
-                        getReferencesInNode(sourceFile, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
-                    }
-                }
-            }
-            return result;
-            function getDefinition(symbol) {
-                var info = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, node.getSourceFile(), getContainerNode(node), node);
-                var name = ts.map(info.displayParts, function (p) { return p.text; }).join("");
-                var declarations = symbol.declarations;
-                if (!declarations || declarations.length === 0) {
-                    return undefined;
-                }
-                return {
-                    containerKind: "",
-                    containerName: "",
-                    name: name,
-                    kind: info.symbolKind,
-                    fileName: declarations[0].getSourceFile().fileName,
-                    textSpan: ts.createTextSpan(declarations[0].getStart(), 0)
-                };
-            }
-            function getAliasSymbolForPropertyNameSymbol(symbol, location) {
-                if (symbol.flags & 8388608 /* Alias */) {
-                    // Default import get alias
-                    var defaultImport = ts.getDeclarationOfKind(symbol, 231 /* ImportClause */);
-                    if (defaultImport) {
-                        return typeChecker.getAliasedSymbol(symbol);
-                    }
-                    var importOrExportSpecifier = ts.forEach(symbol.declarations, function (declaration) { return (declaration.kind === 234 /* ImportSpecifier */ ||
-                        declaration.kind === 238 /* ExportSpecifier */) ? declaration : undefined; });
-                    if (importOrExportSpecifier &&
-                        // export { a }
-                        (!importOrExportSpecifier.propertyName ||
-                            // export {a as class } where a is location
-                            importOrExportSpecifier.propertyName === location)) {
-                        // If Import specifier -> get alias
-                        // else Export specifier -> get local target
-                        return importOrExportSpecifier.kind === 234 /* ImportSpecifier */ ?
-                            typeChecker.getAliasedSymbol(symbol) :
-                            typeChecker.getExportSpecifierLocalTargetSymbol(importOrExportSpecifier);
-                    }
-                }
-                return undefined;
-            }
-            function getPropertySymbolOfDestructuringAssignment(location) {
-                return ts.isArrayLiteralOrObjectLiteralDestructuringPattern(location.parent.parent) &&
-                    typeChecker.getPropertySymbolOfDestructuringAssignment(location);
-            }
-            function isObjectBindingPatternElementWithoutPropertyName(symbol) {
-                var bindingElement = ts.getDeclarationOfKind(symbol, 169 /* BindingElement */);
-                return bindingElement &&
-                    bindingElement.parent.kind === 167 /* ObjectBindingPattern */ &&
-                    !bindingElement.propertyName;
-            }
-            function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol) {
-                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
-                    var bindingElement = ts.getDeclarationOfKind(symbol, 169 /* BindingElement */);
-                    var typeOfPattern = typeChecker.getTypeAtLocation(bindingElement.parent);
-                    return typeOfPattern && typeChecker.getPropertyOfType(typeOfPattern, bindingElement.name.text);
-                }
-                return undefined;
-            }
-            function getInternedName(symbol, location, declarations) {
-                // If this is an export or import specifier it could have been renamed using the 'as' syntax.
-                // If so we want to search for whatever under the cursor.
-                if (ts.isImportOrExportSpecifierName(location)) {
-                    return location.getText();
-                }
-                // Try to get the local symbol if we're dealing with an 'export default'
-                // since that symbol has the "true" name.
-                var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
-                symbol = localExportDefaultSymbol || symbol;
-                return ts.stripQuotes(symbol.name);
-            }
-            /**
-             * Determines the smallest scope in which a symbol may have named references.
-             * Note that not every construct has been accounted for. This function can
-             * probably be improved.
-             *
-             * @returns undefined if the scope cannot be determined, implying that
-             * a reference to a symbol can occur anywhere.
-             */
-            function getSymbolScope(symbol) {
-                // If this is the symbol of a named function expression or named class expression,
-                // then named references are limited to its own scope.
-                var valueDeclaration = symbol.valueDeclaration;
-                if (valueDeclaration && (valueDeclaration.kind === 179 /* FunctionExpression */ || valueDeclaration.kind === 192 /* ClassExpression */)) {
-                    return valueDeclaration;
-                }
-                // If this is private property or method, the scope is the containing class
-                if (symbol.flags & (4 /* Property */ | 8192 /* Method */)) {
-                    var privateDeclaration = ts.forEach(symbol.getDeclarations(), function (d) { return (d.flags & 8 /* Private */) ? d : undefined; });
-                    if (privateDeclaration) {
-                        return ts.getAncestor(privateDeclaration, 221 /* ClassDeclaration */);
-                    }
-                }
-                // If the symbol is an import we would like to find it if we are looking for what it imports.
-                // So consider it visible outside its declaration scope.
-                if (symbol.flags & 8388608 /* Alias */) {
-                    return undefined;
-                }
-                // If symbol is of object binding pattern element without property name we would want to
-                // look for property too and that could be anywhere
-                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
-                    return undefined;
-                }
-                // if this symbol is visible from its parent container, e.g. exported, then bail out
-                // if symbol correspond to the union property - bail out
-                if (symbol.parent || (symbol.flags & 268435456 /* SyntheticProperty */)) {
-                    return undefined;
-                }
-                var scope;
-                var declarations = symbol.getDeclarations();
-                if (declarations) {
-                    for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
-                        var declaration = declarations_9[_i];
-                        var container = getContainerNode(declaration);
-                        if (!container) {
-                            return undefined;
-                        }
-                        if (scope && scope !== container) {
-                            // Different declarations have different containers, bail out
-                            return undefined;
-                        }
-                        if (container.kind === 256 /* SourceFile */ && !ts.isExternalModule(container)) {
-                            // This is a global variable and not an external module, any declaration defined
-                            // within this scope is visible outside the file
-                            return undefined;
-                        }
-                        // The search scope is the container node
-                        scope = container;
-                    }
-                }
-                return scope;
-            }
-            function getPossibleSymbolReferencePositions(sourceFile, symbolName, start, end) {
-                var positions = [];
-                /// TODO: Cache symbol existence for files to save text search
-                // Also, need to make this work for unicode escapes.
-                // Be resilient in the face of a symbol with no name or zero length name
-                if (!symbolName || !symbolName.length) {
-                    return positions;
-                }
-                var text = sourceFile.text;
-                var sourceLength = text.length;
-                var symbolNameLength = symbolName.length;
-                var position = text.indexOf(symbolName, start);
-                while (position >= 0) {
-                    cancellationToken.throwIfCancellationRequested();
-                    // If we are past the end, stop looking
-                    if (position > end)
-                        break;
-                    // We found a match.  Make sure it's not part of a larger word (i.e. the char
-                    // before and after it have to be a non-identifier char).
-                    var endPosition = position + symbolNameLength;
-                    if ((position === 0 || !ts.isIdentifierPart(text.charCodeAt(position - 1), 2 /* Latest */)) &&
-                        (endPosition === sourceLength || !ts.isIdentifierPart(text.charCodeAt(endPosition), 2 /* Latest */))) {
-                        // Found a real match.  Keep searching.
-                        positions.push(position);
-                    }
-                    position = text.indexOf(symbolName, position + symbolNameLength + 1);
-                }
-                return positions;
-            }
-            function getLabelReferencesInNode(container, targetLabel) {
-                var references = [];
-                var sourceFile = container.getSourceFile();
-                var labelName = targetLabel.text;
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container.getStart(), container.getEnd());
-                ts.forEach(possiblePositions, function (position) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var node = ts.getTouchingWord(sourceFile, position);
-                    if (!node || node.getWidth() !== labelName.length) {
-                        return;
-                    }
-                    // Only pick labels that are either the target label, or have a target that is the target label
-                    if (node === targetLabel ||
-                        (isJumpStatementTarget(node) && getTargetLabel(node, labelName) === targetLabel)) {
-                        references.push(getReferenceEntryFromNode(node));
-                    }
-                });
-                var definition = {
-                    containerKind: "",
-                    containerName: "",
-                    fileName: targetLabel.getSourceFile().fileName,
-                    kind: ScriptElementKind.label,
-                    name: labelName,
-                    textSpan: ts.createTextSpanFromBounds(targetLabel.getStart(), targetLabel.getEnd())
-                };
-                return [{ definition: definition, references: references }];
-            }
-            function isValidReferencePosition(node, searchSymbolName) {
-                if (node) {
-                    // Compare the length so we filter out strict superstrings of the symbol we are looking for
-                    switch (node.kind) {
-                        case 69 /* Identifier */:
-                            return node.getWidth() === searchSymbolName.length;
-                        case 9 /* StringLiteral */:
-                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
-                                isNameOfExternalModuleImportOrDeclaration(node)) {
-                                // For string literals we have two additional chars for the quotes
-                                return node.getWidth() === searchSymbolName.length + 2;
-                            }
-                            break;
-                        case 8 /* NumericLiteral */:
-                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                                return node.getWidth() === searchSymbolName.length;
-                            }
-                            break;
-                    }
-                }
-                return false;
-            }
-            /** Search within node "container" for references for a search value, where the search value is defined as a
-              * tuple of(searchSymbol, searchText, searchLocation, and searchMeaning).
-              * searchLocation: a node where the search value
-              */
-            function getReferencesInNode(container, searchSymbol, searchText, searchLocation, searchMeaning, findInStrings, findInComments, result, symbolToIndex) {
-                var sourceFile = container.getSourceFile();
-                var tripleSlashDirectivePrefixRegex = /^\/\/\/\s*</;
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, container.getStart(), container.getEnd());
-                if (possiblePositions.length) {
-                    // Build the set of symbols to search for, initially it has only the current symbol
-                    var searchSymbols_1 = populateSearchSymbolSet(searchSymbol, searchLocation);
-                    ts.forEach(possiblePositions, function (position) {
-                        cancellationToken.throwIfCancellationRequested();
-                        var referenceLocation = ts.getTouchingPropertyName(sourceFile, position);
-                        if (!isValidReferencePosition(referenceLocation, searchText)) {
-                            // This wasn't the start of a token.  Check to see if it might be a
-                            // match in a comment or string if that's what the caller is asking
-                            // for.
-                            if ((findInStrings && ts.isInString(sourceFile, position)) ||
-                                (findInComments && isInNonReferenceComment(sourceFile, position))) {
-                                // In the case where we're looking inside comments/strings, we don't have
-                                // an actual definition.  So just use 'undefined' here.  Features like
-                                // 'Rename' won't care (as they ignore the definitions), and features like
-                                // 'FindReferences' will just filter out these results.
-                                result.push({
-                                    definition: undefined,
-                                    references: [{
-                                            fileName: sourceFile.fileName,
-                                            textSpan: ts.createTextSpan(position, searchText.length),
-                                            isWriteAccess: false
-                                        }]
-                                });
-                            }
-                            return;
-                        }
-                        if (!(getMeaningFromLocation(referenceLocation) & searchMeaning)) {
-                            return;
-                        }
-                        var referenceSymbol = typeChecker.getSymbolAtLocation(referenceLocation);
-                        if (referenceSymbol) {
-                            var referenceSymbolDeclaration = referenceSymbol.valueDeclaration;
-                            var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(referenceSymbolDeclaration);
-                            var relatedSymbol = getRelatedSymbol(searchSymbols_1, referenceSymbol, referenceLocation);
-                            if (relatedSymbol) {
-                                var referencedSymbol = getReferencedSymbol(relatedSymbol);
-                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceLocation));
-                            }
-                            else if (!(referenceSymbol.flags & 67108864 /* Transient */) && searchSymbols_1.indexOf(shorthandValueSymbol) >= 0) {
-                                var referencedSymbol = getReferencedSymbol(shorthandValueSymbol);
-                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceSymbolDeclaration.name));
-                            }
-                        }
-                    });
-                }
-                return;
-                function getReferencedSymbol(symbol) {
-                    var symbolId = ts.getSymbolId(symbol);
-                    var index = symbolToIndex[symbolId];
-                    if (index === undefined) {
-                        index = result.length;
-                        symbolToIndex[symbolId] = index;
-                        result.push({
-                            definition: getDefinition(symbol),
-                            references: []
-                        });
-                    }
-                    return result[index];
-                }
-                function isInNonReferenceComment(sourceFile, position) {
-                    return ts.isInCommentHelper(sourceFile, position, isNonReferenceComment);
-                    function isNonReferenceComment(c) {
-                        var commentText = sourceFile.text.substring(c.pos, c.end);
-                        return !tripleSlashDirectivePrefixRegex.test(commentText);
-                    }
-                }
-            }
-            function getReferencesForSuperKeyword(superKeyword) {
-                var searchSpaceNode = ts.getSuperContainer(superKeyword, /*stopOnFunctions*/ false);
-                if (!searchSpaceNode) {
-                    return undefined;
-                }
-                // Whether 'super' occurs in a static context within a class.
-                var staticFlag = 32 /* Static */;
-                switch (searchSpaceNode.kind) {
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        staticFlag &= searchSpaceNode.flags;
-                        searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
-                        break;
-                    default:
-                        return undefined;
-                }
-                var references = [];
-                var sourceFile = searchSpaceNode.getSourceFile();
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
-                ts.forEach(possiblePositions, function (position) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var node = ts.getTouchingWord(sourceFile, position);
-                    if (!node || node.kind !== 95 /* SuperKeyword */) {
-                        return;
-                    }
-                    var container = ts.getSuperContainer(node, /*stopOnFunctions*/ false);
-                    // If we have a 'super' container, we must have an enclosing class.
-                    // Now make sure the owning class is the same as the search-space
-                    // and has the same static qualifier as the original 'super's owner.
-                    if (container && (32 /* Static */ & container.flags) === staticFlag && container.parent.symbol === searchSpaceNode.symbol) {
-                        references.push(getReferenceEntryFromNode(node));
-                    }
-                });
-                var definition = getDefinition(searchSpaceNode.symbol);
-                return [{ definition: definition, references: references }];
-            }
-            function getReferencesForThisKeyword(thisOrSuperKeyword, sourceFiles) {
-                var searchSpaceNode = ts.getThisContainer(thisOrSuperKeyword, /* includeArrowFunctions */ false);
-                // Whether 'this' occurs in a static context within a class.
-                var staticFlag = 32 /* Static */;
-                switch (searchSpaceNode.kind) {
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (ts.isObjectLiteralMethod(searchSpaceNode)) {
-                            break;
-                        }
-                    // fall through
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        staticFlag &= searchSpaceNode.flags;
-                        searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
-                        break;
-                    case 256 /* SourceFile */:
-                        if (ts.isExternalModule(searchSpaceNode)) {
-                            return undefined;
-                        }
-                    // Fall through
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                        break;
-                    // Computed properties in classes are not handled here because references to this are illegal,
-                    // so there is no point finding references to them.
-                    default:
-                        return undefined;
-                }
-                var references = [];
-                var possiblePositions;
-                if (searchSpaceNode.kind === 256 /* SourceFile */) {
-                    ts.forEach(sourceFiles, function (sourceFile) {
-                        possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", sourceFile.getStart(), sourceFile.getEnd());
-                        getThisReferencesInFile(sourceFile, sourceFile, possiblePositions, references);
-                    });
-                }
-                else {
-                    var sourceFile = searchSpaceNode.getSourceFile();
-                    possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
-                    getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, references);
-                }
-                return [{
-                        definition: {
-                            containerKind: "",
-                            containerName: "",
-                            fileName: node.getSourceFile().fileName,
-                            kind: ScriptElementKind.variableElement,
-                            name: "this",
-                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
-                        },
-                        references: references
-                    }];
-                function getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, result) {
-                    ts.forEach(possiblePositions, function (position) {
-                        cancellationToken.throwIfCancellationRequested();
-                        var node = ts.getTouchingWord(sourceFile, position);
-                        if (!node || (node.kind !== 97 /* ThisKeyword */ && node.kind !== 165 /* ThisType */)) {
-                            return;
-                        }
-                        var container = ts.getThisContainer(node, /* includeArrowFunctions */ false);
-                        switch (searchSpaceNode.kind) {
-                            case 179 /* FunctionExpression */:
-                            case 220 /* FunctionDeclaration */:
-                                if (searchSpaceNode.symbol === container.symbol) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                            case 147 /* MethodDeclaration */:
-                            case 146 /* MethodSignature */:
-                                if (ts.isObjectLiteralMethod(searchSpaceNode) && searchSpaceNode.symbol === container.symbol) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                            case 192 /* ClassExpression */:
-                            case 221 /* ClassDeclaration */:
-                                // Make sure the container belongs to the same class
-                                // and has the appropriate static modifier from the original container.
-                                if (container.parent && searchSpaceNode.symbol === container.parent.symbol && (container.flags & 32 /* Static */) === staticFlag) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                            case 256 /* SourceFile */:
-                                if (container.kind === 256 /* SourceFile */ && !ts.isExternalModule(container)) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                        }
-                    });
-                }
-            }
-            function getReferencesForStringLiteral(node, sourceFiles) {
-                var typeChecker = program.getTypeChecker();
-                var type = getStringLiteralTypeForNode(node, typeChecker);
-                if (!type) {
-                    // nothing to do here. moving on
-                    return undefined;
-                }
-                var references = [];
-                for (var _i = 0, sourceFiles_5 = sourceFiles; _i < sourceFiles_5.length; _i++) {
-                    var sourceFile = sourceFiles_5[_i];
-                    var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, type.text, sourceFile.getStart(), sourceFile.getEnd());
-                    getReferencesForStringLiteralInFile(sourceFile, type, possiblePositions, references);
-                }
-                return [{
-                        definition: {
-                            containerKind: "",
-                            containerName: "",
-                            fileName: node.getSourceFile().fileName,
-                            kind: ScriptElementKind.variableElement,
-                            name: type.text,
-                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
-                        },
-                        references: references
-                    }];
-                function getReferencesForStringLiteralInFile(sourceFile, searchType, possiblePositions, references) {
-                    for (var _i = 0, possiblePositions_1 = possiblePositions; _i < possiblePositions_1.length; _i++) {
-                        var position = possiblePositions_1[_i];
-                        cancellationToken.throwIfCancellationRequested();
-                        var node_2 = ts.getTouchingWord(sourceFile, position);
-                        if (!node_2 || node_2.kind !== 9 /* StringLiteral */) {
-                            return;
-                        }
-                        var type_1 = getStringLiteralTypeForNode(node_2, typeChecker);
-                        if (type_1 === searchType) {
-                            references.push(getReferenceEntryFromNode(node_2));
-                        }
-                    }
-                }
-            }
-            function populateSearchSymbolSet(symbol, location) {
-                // The search set contains at least the current symbol
-                var result = [symbol];
-                // If the location is name of property symbol from object literal destructuring pattern
-                // Search the property symbol
-                //      for ( { property: p2 } of elems) { }
-                var containingObjectLiteralElement = getContainingObjectLiteralElement(location);
-                if (containingObjectLiteralElement && containingObjectLiteralElement.kind !== 254 /* ShorthandPropertyAssignment */) {
-                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(location);
-                    if (propertySymbol) {
-                        result.push(propertySymbol);
-                    }
-                }
-                // If the symbol is an alias, add what it aliases to the list
-                //     import {a} from "mod";
-                //     export {a}
-                // If the symbol is an alias to default declaration, add what it aliases to the list
-                //     declare "mod" { export default class B { } }
-                //     import B from "mod";
-                //// For export specifiers, the exported name can be referring to a local symbol, e.g.:
-                ////     import {a} from "mod";
-                ////     export {a as somethingElse}
-                //// We want the *local* declaration of 'a' as declared in the import,
-                //// *not* as declared within "mod" (or farther)
-                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(symbol, location);
-                if (aliasSymbol) {
-                    result = result.concat(populateSearchSymbolSet(aliasSymbol, location));
-                }
-                // If the location is in a context sensitive location (i.e. in an object literal) try
-                // to get a contextual type for it, and add the property symbol from the contextual
-                // type to the search set
-                if (containingObjectLiteralElement) {
-                    ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
-                        ts.addRange(result, typeChecker.getRootSymbols(contextualSymbol));
-                    });
-                    /* Because in short-hand property assignment, location has two meaning : property name and as value of the property
-                     * When we do findAllReference at the position of the short-hand property assignment, we would want to have references to position of
-                     * property name and variable declaration of the identifier.
-                     * Like in below example, when querying for all references for an identifier 'name', of the property assignment, the language service
-                     * should show both 'name' in 'obj' and 'name' in variable declaration
-                     *      const name = "Foo";
-                     *      const obj = { name };
-                     * In order to do that, we will populate the search set with the value symbol of the identifier as a value of the property assignment
-                     * so that when matching with potential reference symbol, both symbols from property declaration and variable declaration
-                     * will be included correctly.
-                     */
-                    var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(location.parent);
-                    if (shorthandValueSymbol) {
-                        result.push(shorthandValueSymbol);
-                    }
-                }
-                // If the symbol.valueDeclaration is a property parameter declaration,
-                // we should include both parameter declaration symbol and property declaration symbol
-                // Parameter Declaration symbol is only visible within function scope, so the symbol is stored in constructor.locals.
-                // Property Declaration symbol is a member of the class, so the symbol is stored in its class Declaration.symbol.members
-                if (symbol.valueDeclaration && symbol.valueDeclaration.kind === 142 /* Parameter */ &&
-                    ts.isParameterPropertyDeclaration(symbol.valueDeclaration)) {
-                    result = result.concat(typeChecker.getSymbolsOfParameterPropertyDeclaration(symbol.valueDeclaration, symbol.name));
-                }
-                // If this is symbol of binding element without propertyName declaration in Object binding pattern
-                // Include the property in the search
-                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol);
-                if (bindingElementPropertySymbol) {
-                    result.push(bindingElementPropertySymbol);
-                }
-                // If this is a union property, add all the symbols from all its source symbols in all unioned types.
-                // If the symbol is an instantiation from a another symbol (e.g. widened symbol) , add the root the list
-                ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
-                    if (rootSymbol !== symbol) {
-                        result.push(rootSymbol);
-                    }
-                    // Add symbol of properties/methods of the same name in base classes and implemented interfaces definitions
-                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 /* Class */ | 64 /* Interface */)) {
-                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ {});
-                    }
-                });
-                return result;
-            }
-            /**
-             * Find symbol of the given property-name and add the symbol to the given result array
-             * @param symbol a symbol to start searching for the given propertyName
-             * @param propertyName a name of property to search for
-             * @param result an array of symbol of found property symbols
-             * @param previousIterationSymbolsCache a cache of symbol from previous iterations of calling this function to prevent infinite revisiting of the same symbol.
-             *                                The value of previousIterationSymbol is undefined when the function is first called.
-             */
-            function getPropertySymbolsFromBaseTypes(symbol, propertyName, result, previousIterationSymbolsCache) {
-                if (!symbol) {
-                    return;
-                }
-                // If the current symbol is the same as the previous-iteration symbol, we can just return the symbol that has already been visited
-                // This is particularly important for the following cases, so that we do not infinitely visit the same symbol.
-                // For example:
-                //      interface C extends C {
-                //          /*findRef*/propName: string;
-                //      }
-                // The first time getPropertySymbolsFromBaseTypes is called when finding-all-references at propName,
-                // the symbol argument will be the symbol of an interface "C" and previousIterationSymbol is undefined,
-                // the function will add any found symbol of the property-name, then its sub-routine will call
-                // getPropertySymbolsFromBaseTypes again to walk up any base types to prevent revisiting already
-                // visited symbol, interface "C", the sub-routine will pass the current symbol as previousIterationSymbol.
-                if (ts.hasProperty(previousIterationSymbolsCache, symbol.name)) {
-                    return;
-                }
-                if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
-                    ts.forEach(symbol.getDeclarations(), function (declaration) {
-                        if (ts.isClassLike(declaration)) {
-                            getPropertySymbolFromTypeReference(ts.getClassExtendsHeritageClauseElement(declaration));
-                            ts.forEach(ts.getClassImplementsHeritageClauseElements(declaration), getPropertySymbolFromTypeReference);
-                        }
-                        else if (declaration.kind === 222 /* InterfaceDeclaration */) {
-                            ts.forEach(ts.getInterfaceBaseTypeNodes(declaration), getPropertySymbolFromTypeReference);
-                        }
-                    });
-                }
-                return;
-                function getPropertySymbolFromTypeReference(typeReference) {
-                    if (typeReference) {
-                        var type = typeChecker.getTypeAtLocation(typeReference);
-                        if (type) {
-                            var propertySymbol = typeChecker.getPropertyOfType(type, propertyName);
-                            if (propertySymbol) {
-                                result.push.apply(result, typeChecker.getRootSymbols(propertySymbol));
-                            }
-                            // Visit the typeReference as well to see if it directly or indirectly use that property
-                            previousIterationSymbolsCache[symbol.name] = symbol;
-                            getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache);
-                        }
-                    }
-                }
-            }
-            function getRelatedSymbol(searchSymbols, referenceSymbol, referenceLocation) {
-                if (searchSymbols.indexOf(referenceSymbol) >= 0) {
-                    return referenceSymbol;
-                }
-                // If the reference symbol is an alias, check if what it is aliasing is one of the search
-                // symbols but by looking up for related symbol of this alias so it can handle multiple level of indirectness.
-                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(referenceSymbol, referenceLocation);
-                if (aliasSymbol) {
-                    return getRelatedSymbol(searchSymbols, aliasSymbol, referenceLocation);
-                }
-                // If the reference location is in an object literal, try to get the contextual type for the
-                // object literal, lookup the property symbol in the contextual type, and use this symbol to
-                // compare to our searchSymbol
-                var containingObjectLiteralElement = getContainingObjectLiteralElement(referenceLocation);
-                if (containingObjectLiteralElement) {
-                    var contextualSymbol = ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
-                        return ts.forEach(typeChecker.getRootSymbols(contextualSymbol), function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
-                    });
-                    if (contextualSymbol) {
-                        return contextualSymbol;
-                    }
-                    // If the reference location is the name of property from object literal destructuring pattern
-                    // Get the property symbol from the object literal's type and look if thats the search symbol
-                    // In below eg. get 'property' from type of elems iterating type
-                    //      for ( { property: p2 } of elems) { }
-                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation);
-                    if (propertySymbol && searchSymbols.indexOf(propertySymbol) >= 0) {
-                        return propertySymbol;
-                    }
-                }
-                // If the reference location is the binding element and doesn't have property name
-                // then include the binding element in the related symbols
-                //      let { a } : { a };
-                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol);
-                if (bindingElementPropertySymbol && searchSymbols.indexOf(bindingElementPropertySymbol) >= 0) {
-                    return bindingElementPropertySymbol;
-                }
-                // Unwrap symbols to get to the root (e.g. transient symbols as a result of widening)
-                // Or a union property, use its underlying unioned symbols
-                return ts.forEach(typeChecker.getRootSymbols(referenceSymbol), function (rootSymbol) {
-                    // if it is in the list, then we are done
-                    if (searchSymbols.indexOf(rootSymbol) >= 0) {
-                        return rootSymbol;
-                    }
-                    // Finally, try all properties with the same name in any type the containing type extended or implemented, and
-                    // see if any is in the list
-                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 /* Class */ | 64 /* Interface */)) {
-                        var result_4 = [];
-                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result_4, /*previousIterationSymbolsCache*/ {});
-                        return ts.forEach(result_4, function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
-                    }
-                    return undefined;
-                });
-            }
-            function getNameFromObjectLiteralElement(node) {
-                if (node.name.kind === 140 /* ComputedPropertyName */) {
-                    var nameExpression = node.name.expression;
-                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
-                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
-                        return nameExpression.text;
-                    }
-                    return undefined;
-                }
-                return node.name.text;
-            }
-            function getPropertySymbolsFromContextualType(node) {
-                var objectLiteral = node.parent;
-                var contextualType = typeChecker.getContextualType(objectLiteral);
-                var name = getNameFromObjectLiteralElement(node);
-                if (name && contextualType) {
-                    var result_5 = [];
-                    var symbol_1 = contextualType.getProperty(name);
-                    if (symbol_1) {
-                        result_5.push(symbol_1);
-                    }
-                    if (contextualType.flags & 16384 /* Union */) {
-                        ts.forEach(contextualType.types, function (t) {
-                            var symbol = t.getProperty(name);
-                            if (symbol) {
-                                result_5.push(symbol);
-                            }
-                        });
-                    }
-                    return result_5;
-                }
-                return undefined;
-            }
-            /** Given an initial searchMeaning, extracted from a location, widen the search scope based on the declarations
-              * of the corresponding symbol. e.g. if we are searching for "Foo" in value position, but "Foo" references a class
-              * then we need to widen the search to include type positions as well.
-              * On the contrary, if we are searching for "Bar" in type position and we trace bar to an interface, and an uninstantiated
-              * module, we want to keep the search limited to only types, as the two declarations (interface and uninstantiated module)
-              * do not intersect in any of the three spaces.
-              */
-            function getIntersectingMeaningFromDeclarations(meaning, declarations) {
-                if (declarations) {
-                    var lastIterationMeaning = void 0;
-                    do {
-                        // The result is order-sensitive, for instance if initialMeaning === Namespace, and declarations = [class, instantiated module]
-                        // we need to consider both as they initialMeaning intersects with the module in the namespace space, and the module
-                        // intersects with the class in the value space.
-                        // To achieve that we will keep iterating until the result stabilizes.
-                        // Remember the last meaning
-                        lastIterationMeaning = meaning;
-                        for (var _i = 0, declarations_10 = declarations; _i < declarations_10.length; _i++) {
-                            var declaration = declarations_10[_i];
-                            var declarationMeaning = getMeaningFromDeclaration(declaration);
-                            if (declarationMeaning & meaning) {
-                                meaning |= declarationMeaning;
-                            }
-                        }
-                    } while (meaning !== lastIterationMeaning);
-                }
-                return meaning;
-            }
-        }
-        function getReferenceEntryFromNode(node) {
-            var start = node.getStart();
-            var end = node.getEnd();
-            if (node.kind === 9 /* StringLiteral */) {
-                start += 1;
-                end -= 1;
-            }
-            return {
-                fileName: node.getSourceFile().fileName,
-                textSpan: ts.createTextSpanFromBounds(start, end),
-                isWriteAccess: isWriteAccess(node)
-            };
-        }
-        /** A node is considered a writeAccess iff it is a name of a declaration or a target of an assignment */
-        function isWriteAccess(node) {
-            if (node.kind === 69 /* Identifier */ && ts.isDeclarationName(node)) {
-                return true;
-            }
-            var parent = node.parent;
-            if (parent) {
-                if (parent.kind === 186 /* PostfixUnaryExpression */ || parent.kind === 185 /* PrefixUnaryExpression */) {
-                    return true;
-                }
-                else if (parent.kind === 187 /* BinaryExpression */ && parent.left === node) {
-                    var operator = parent.operatorToken.kind;
-                    return 56 /* FirstAssignment */ <= operator && operator <= 68 /* LastAssignment */;
-                }
-            }
-            return false;
-        }
-        /// NavigateTo
-        function getNavigateToItems(searchValue, maxResultCount) {
-            synchronizeHostData();
-            var checker = getProgram().getTypeChecker();
-            return ts.NavigateTo.getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount);
-        }
-        function getEmitOutput(fileName) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var outputFiles = [];
-            function writeFile(fileName, data, writeByteOrderMark) {
-                outputFiles.push({
-                    name: fileName,
-                    writeByteOrderMark: writeByteOrderMark,
-                    text: data
-                });
-            }
-            var emitOutput = program.emit(sourceFile, writeFile, cancellationToken);
-            return {
-                outputFiles: outputFiles,
-                emitSkipped: emitOutput.emitSkipped
-            };
-        }
-        function getMeaningFromDeclaration(node) {
-            switch (node.kind) {
-                case 142 /* Parameter */:
-                case 218 /* VariableDeclaration */:
-                case 169 /* BindingElement */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 253 /* PropertyAssignment */:
-                case 254 /* ShorthandPropertyAssignment */:
-                case 255 /* EnumMember */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                case 252 /* CatchClause */:
-                    return 1 /* Value */;
-                case 141 /* TypeParameter */:
-                case 222 /* InterfaceDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 159 /* TypeLiteral */:
-                    return 2 /* Type */;
-                case 221 /* ClassDeclaration */:
-                case 224 /* EnumDeclaration */:
-                    return 1 /* Value */ | 2 /* Type */;
-                case 225 /* ModuleDeclaration */:
-                    if (ts.isAmbientModule(node)) {
-                        return 4 /* Namespace */ | 1 /* Value */;
-                    }
-                    else if (ts.getModuleInstanceState(node) === 1 /* Instantiated */) {
-                        return 4 /* Namespace */ | 1 /* Value */;
-                    }
-                    else {
-                        return 4 /* Namespace */;
-                    }
-                case 233 /* NamedImports */:
-                case 234 /* ImportSpecifier */:
-                case 229 /* ImportEqualsDeclaration */:
-                case 230 /* ImportDeclaration */:
-                case 235 /* ExportAssignment */:
-                case 236 /* ExportDeclaration */:
-                    return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
-                // An external module can be a Value
-                case 256 /* SourceFile */:
-                    return 4 /* Namespace */ | 1 /* Value */;
-            }
-            return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
-        }
-        function isTypeReference(node) {
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(node)) {
-                node = node.parent;
-            }
-            return node.parent.kind === 155 /* TypeReference */ ||
-                (node.parent.kind === 194 /* ExpressionWithTypeArguments */ && !ts.isExpressionWithTypeArgumentsInClassExtendsClause(node.parent)) ||
-                (node.kind === 97 /* ThisKeyword */ && !ts.isExpression(node)) ||
-                node.kind === 165 /* ThisType */;
-        }
-        function isNamespaceReference(node) {
-            return isQualifiedNameNamespaceReference(node) || isPropertyAccessNamespaceReference(node);
-        }
-        function isPropertyAccessNamespaceReference(node) {
-            var root = node;
-            var isLastClause = true;
-            if (root.parent.kind === 172 /* PropertyAccessExpression */) {
-                while (root.parent && root.parent.kind === 172 /* PropertyAccessExpression */) {
-                    root = root.parent;
-                }
-                isLastClause = root.name === node;
-            }
-            if (!isLastClause && root.parent.kind === 194 /* ExpressionWithTypeArguments */ && root.parent.parent.kind === 251 /* HeritageClause */) {
-                var decl = root.parent.parent.parent;
-                return (decl.kind === 221 /* ClassDeclaration */ && root.parent.parent.token === 106 /* ImplementsKeyword */) ||
-                    (decl.kind === 222 /* InterfaceDeclaration */ && root.parent.parent.token === 83 /* ExtendsKeyword */);
-            }
-            return false;
-        }
-        function isQualifiedNameNamespaceReference(node) {
-            var root = node;
-            var isLastClause = true;
-            if (root.parent.kind === 139 /* QualifiedName */) {
-                while (root.parent && root.parent.kind === 139 /* QualifiedName */) {
-                    root = root.parent;
-                }
-                isLastClause = root.right === node;
-            }
-            return root.parent.kind === 155 /* TypeReference */ && !isLastClause;
-        }
-        function isInRightSideOfImport(node) {
-            while (node.parent.kind === 139 /* QualifiedName */) {
-                node = node.parent;
-            }
-            return ts.isInternalModuleImportEqualsDeclaration(node.parent) && node.parent.moduleReference === node;
-        }
-        function getMeaningFromRightHandSideOfImportEquals(node) {
-            ts.Debug.assert(node.kind === 69 /* Identifier */);
-            //     import a = |b|; // Namespace
-            //     import a = |b.c|; // Value, type, namespace
-            //     import a = |b.c|.d; // Namespace
-            if (node.parent.kind === 139 /* QualifiedName */ &&
-                node.parent.right === node &&
-                node.parent.parent.kind === 229 /* ImportEqualsDeclaration */) {
-                return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
-            }
-            return 4 /* Namespace */;
-        }
-        function getMeaningFromLocation(node) {
-            if (node.parent.kind === 235 /* ExportAssignment */) {
-                return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
-            }
-            else if (isInRightSideOfImport(node)) {
-                return getMeaningFromRightHandSideOfImportEquals(node);
-            }
-            else if (ts.isDeclarationName(node)) {
-                return getMeaningFromDeclaration(node.parent);
-            }
-            else if (isTypeReference(node)) {
-                return 2 /* Type */;
-            }
-            else if (isNamespaceReference(node)) {
-                return 4 /* Namespace */;
-            }
-            else {
-                return 1 /* Value */;
-            }
-        }
-        // Signature help
-        /**
-         * This is a semantic operation.
-         */
-        function getSignatureHelpItems(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            return ts.SignatureHelp.getSignatureHelpItems(program, sourceFile, position, cancellationToken);
-        }
-        /// Syntactic features
-        function getNonBoundSourceFile(fileName) {
-            return syntaxTreeCache.getCurrentSourceFile(fileName);
-        }
-        function getNameOrDottedNameSpan(fileName, startPos, endPos) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            // Get node at the location
-            var node = ts.getTouchingPropertyName(sourceFile, startPos);
-            if (node === sourceFile) {
-                return;
-            }
-            switch (node.kind) {
-                case 172 /* PropertyAccessExpression */:
-                case 139 /* QualifiedName */:
-                case 9 /* StringLiteral */:
-                case 166 /* StringLiteralType */:
-                case 84 /* FalseKeyword */:
-                case 99 /* TrueKeyword */:
-                case 93 /* NullKeyword */:
-                case 95 /* SuperKeyword */:
-                case 97 /* ThisKeyword */:
-                case 165 /* ThisType */:
-                case 69 /* Identifier */:
-                    break;
-                // Cant create the text span
-                default:
-                    return;
-            }
-            var nodeForStartPos = node;
-            while (true) {
-                if (isRightSideOfPropertyAccess(nodeForStartPos) || isRightSideOfQualifiedName(nodeForStartPos)) {
-                    // If on the span is in right side of the the property or qualified name, return the span from the qualified name pos to end of this node
-                    nodeForStartPos = nodeForStartPos.parent;
-                }
-                else if (isNameOfModuleDeclaration(nodeForStartPos)) {
-                    // If this is name of a module declarations, check if this is right side of dotted module name
-                    // If parent of the module declaration which is parent of this node is module declaration and its body is the module declaration that this node is name of
-                    // Then this name is name from dotted module
-                    if (nodeForStartPos.parent.parent.kind === 225 /* ModuleDeclaration */ &&
-                        nodeForStartPos.parent.parent.body === nodeForStartPos.parent) {
-                        // Use parent module declarations name for start pos
-                        nodeForStartPos = nodeForStartPos.parent.parent.name;
-                    }
-                    else {
-                        // We have to use this name for start pos
-                        break;
-                    }
-                }
-                else {
-                    // Is not a member expression so we have found the node for start pos
-                    break;
-                }
-            }
-            return ts.createTextSpanFromBounds(nodeForStartPos.getStart(), node.getEnd());
-        }
-        function getBreakpointStatementAtPosition(fileName, position) {
-            // doesn't use compiler - no need to synchronize with host
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.BreakpointResolver.spanInSourceFileAtLocation(sourceFile, position);
-        }
-        function getNavigationBarItems(fileName) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.NavigationBar.getNavigationBarItems(sourceFile, host.getCompilationSettings());
-        }
-        function getSemanticClassifications(fileName, span) {
-            return convertClassifications(getEncodedSemanticClassifications(fileName, span));
-        }
-        function checkForClassificationCancellation(kind) {
-            // We don't want to actually call back into our host on every node to find out if we've
-            // been canceled.  That would be an enormous amount of chattyness, along with the all
-            // the overhead of marshalling the data to/from the host.  So instead we pick a few
-            // reasonable node kinds to bother checking on.  These node kinds represent high level
-            // constructs that we would expect to see commonly, but just at a far less frequent
-            // interval.
-            //
-            // For example, in checker.ts (around 750k) we only have around 600 of these constructs.
-            // That means we're calling back into the host around every 1.2k of the file we process.
-            // Lib.d.ts has similar numbers.
-            switch (kind) {
-                case 225 /* ModuleDeclaration */:
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 220 /* FunctionDeclaration */:
-                    cancellationToken.throwIfCancellationRequested();
-            }
-        }
-        function getEncodedSemanticClassifications(fileName, span) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var typeChecker = program.getTypeChecker();
-            var result = [];
-            var classifiableNames = program.getClassifiableNames();
-            processNode(sourceFile);
-            return { spans: result, endOfLineState: 0 /* None */ };
-            function pushClassification(start, length, type) {
-                result.push(start);
-                result.push(length);
-                result.push(type);
-            }
-            function classifySymbol(symbol, meaningAtPosition) {
-                var flags = symbol.getFlags();
-                if ((flags & 788448 /* Classifiable */) === 0 /* None */) {
-                    return;
-                }
-                if (flags & 32 /* Class */) {
-                    return 11 /* className */;
-                }
-                else if (flags & 384 /* Enum */) {
-                    return 12 /* enumName */;
-                }
-                else if (flags & 524288 /* TypeAlias */) {
-                    return 16 /* typeAliasName */;
-                }
-                else if (meaningAtPosition & 2 /* Type */) {
-                    if (flags & 64 /* Interface */) {
-                        return 13 /* interfaceName */;
-                    }
-                    else if (flags & 262144 /* TypeParameter */) {
-                        return 15 /* typeParameterName */;
-                    }
-                }
-                else if (flags & 1536 /* Module */) {
-                    // Only classify a module as such if
-                    //  - It appears in a namespace context.
-                    //  - There exists a module declaration which actually impacts the value side.
-                    if (meaningAtPosition & 4 /* Namespace */ ||
-                        (meaningAtPosition & 1 /* Value */ && hasValueSideModule(symbol))) {
-                        return 14 /* moduleName */;
-                    }
-                }
-                return undefined;
-                /**
-                 * Returns true if there exists a module that introduces entities on the value side.
-                 */
-                function hasValueSideModule(symbol) {
-                    return ts.forEach(symbol.declarations, function (declaration) {
-                        return declaration.kind === 225 /* ModuleDeclaration */ &&
-                            ts.getModuleInstanceState(declaration) === 1 /* Instantiated */;
-                    });
-                }
-            }
-            function processNode(node) {
-                // Only walk into nodes that intersect the requested span.
-                if (node && ts.textSpanIntersectsWith(span, node.getFullStart(), node.getFullWidth())) {
-                    var kind = node.kind;
-                    checkForClassificationCancellation(kind);
-                    if (kind === 69 /* Identifier */ && !ts.nodeIsMissing(node)) {
-                        var identifier = node;
-                        // Only bother calling into the typechecker if this is an identifier that
-                        // could possibly resolve to a type name.  This makes classification run
-                        // in a third of the time it would normally take.
-                        if (classifiableNames[identifier.text]) {
-                            var symbol = typeChecker.getSymbolAtLocation(node);
-                            if (symbol) {
-                                var type = classifySymbol(symbol, getMeaningFromLocation(node));
-                                if (type) {
-                                    pushClassification(node.getStart(), node.getWidth(), type);
-                                }
-                            }
-                        }
-                    }
-                    ts.forEachChild(node, processNode);
-                }
-            }
-        }
-        function getClassificationTypeName(type) {
-            switch (type) {
-                case 1 /* comment */: return ClassificationTypeNames.comment;
-                case 2 /* identifier */: return ClassificationTypeNames.identifier;
-                case 3 /* keyword */: return ClassificationTypeNames.keyword;
-                case 4 /* numericLiteral */: return ClassificationTypeNames.numericLiteral;
-                case 5 /* operator */: return ClassificationTypeNames.operator;
-                case 6 /* stringLiteral */: return ClassificationTypeNames.stringLiteral;
-                case 8 /* whiteSpace */: return ClassificationTypeNames.whiteSpace;
-                case 9 /* text */: return ClassificationTypeNames.text;
-                case 10 /* punctuation */: return ClassificationTypeNames.punctuation;
-                case 11 /* className */: return ClassificationTypeNames.className;
-                case 12 /* enumName */: return ClassificationTypeNames.enumName;
-                case 13 /* interfaceName */: return ClassificationTypeNames.interfaceName;
-                case 14 /* moduleName */: return ClassificationTypeNames.moduleName;
-                case 15 /* typeParameterName */: return ClassificationTypeNames.typeParameterName;
-                case 16 /* typeAliasName */: return ClassificationTypeNames.typeAliasName;
-                case 17 /* parameterName */: return ClassificationTypeNames.parameterName;
-                case 18 /* docCommentTagName */: return ClassificationTypeNames.docCommentTagName;
-                case 19 /* jsxOpenTagName */: return ClassificationTypeNames.jsxOpenTagName;
-                case 20 /* jsxCloseTagName */: return ClassificationTypeNames.jsxCloseTagName;
-                case 21 /* jsxSelfClosingTagName */: return ClassificationTypeNames.jsxSelfClosingTagName;
-                case 22 /* jsxAttribute */: return ClassificationTypeNames.jsxAttribute;
-                case 23 /* jsxText */: return ClassificationTypeNames.jsxText;
-                case 24 /* jsxAttributeStringLiteralValue */: return ClassificationTypeNames.jsxAttributeStringLiteralValue;
-            }
-        }
-        function convertClassifications(classifications) {
-            ts.Debug.assert(classifications.spans.length % 3 === 0);
-            var dense = classifications.spans;
-            var result = [];
-            for (var i = 0, n = dense.length; i < n; i += 3) {
-                result.push({
-                    textSpan: ts.createTextSpan(dense[i], dense[i + 1]),
-                    classificationType: getClassificationTypeName(dense[i + 2])
-                });
-            }
-            return result;
-        }
-        function getSyntacticClassifications(fileName, span) {
-            return convertClassifications(getEncodedSyntacticClassifications(fileName, span));
-        }
-        function getEncodedSyntacticClassifications(fileName, span) {
-            // doesn't use compiler - no need to synchronize with host
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            var spanStart = span.start;
-            var spanLength = span.length;
-            // Make a scanner we can get trivia from.
-            var triviaScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
-            var mergeConflictScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
-            var result = [];
-            processElement(sourceFile);
-            return { spans: result, endOfLineState: 0 /* None */ };
-            function pushClassification(start, length, type) {
-                result.push(start);
-                result.push(length);
-                result.push(type);
-            }
-            function classifyLeadingTriviaAndGetTokenStart(token) {
-                triviaScanner.setTextPos(token.pos);
-                while (true) {
-                    var start = triviaScanner.getTextPos();
-                    // only bother scanning if we have something that could be trivia.
-                    if (!ts.couldStartTrivia(sourceFile.text, start)) {
-                        return start;
-                    }
-                    var kind = triviaScanner.scan();
-                    var end = triviaScanner.getTextPos();
-                    var width = end - start;
-                    // The moment we get something that isn't trivia, then stop processing.
-                    if (!ts.isTrivia(kind)) {
-                        return start;
-                    }
-                    // Don't bother with newlines/whitespace.
-                    if (kind === 4 /* NewLineTrivia */ || kind === 5 /* WhitespaceTrivia */) {
-                        continue;
-                    }
-                    // Only bother with the trivia if it at least intersects the span of interest.
-                    if (ts.isComment(kind)) {
-                        classifyComment(token, kind, start, width);
-                        // Classifying a comment might cause us to reuse the trivia scanner
-                        // (because of jsdoc comments).  So after we classify the comment make
-                        // sure we set the scanner position back to where it needs to be.
-                        triviaScanner.setTextPos(end);
-                        continue;
-                    }
-                    if (kind === 7 /* ConflictMarkerTrivia */) {
-                        var text = sourceFile.text;
-                        var ch = text.charCodeAt(start);
-                        // for the <<<<<<< and >>>>>>> markers, we just add them in as comments
-                        // in the classification stream.
-                        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
-                            pushClassification(start, width, 1 /* comment */);
-                            continue;
-                        }
-                        // for the ======== add a comment for the first line, and then lex all
-                        // subsequent lines up until the end of the conflict marker.
-                        ts.Debug.assert(ch === 61 /* equals */);
-                        classifyDisabledMergeCode(text, start, end);
-                    }
-                }
-            }
-            function classifyComment(token, kind, start, width) {
-                if (kind === 3 /* MultiLineCommentTrivia */) {
-                    // See if this is a doc comment.  If so, we'll classify certain portions of it
-                    // specially.
-                    var docCommentAndDiagnostics = ts.parseIsolatedJSDocComment(sourceFile.text, start, width);
-                    if (docCommentAndDiagnostics && docCommentAndDiagnostics.jsDocComment) {
-                        docCommentAndDiagnostics.jsDocComment.parent = token;
-                        classifyJSDocComment(docCommentAndDiagnostics.jsDocComment);
-                        return;
-                    }
-                }
-                // Simple comment.  Just add as is.
-                pushCommentRange(start, width);
-            }
-            function pushCommentRange(start, width) {
-                pushClassification(start, width, 1 /* comment */);
-            }
-            function classifyJSDocComment(docComment) {
-                var pos = docComment.pos;
-                for (var _i = 0, _a = docComment.tags; _i < _a.length; _i++) {
-                    var tag = _a[_i];
-                    // As we walk through each tag, classify the portion of text from the end of
-                    // the last tag (or the start of the entire doc comment) as 'comment'.
-                    if (tag.pos !== pos) {
-                        pushCommentRange(pos, tag.pos - pos);
-                    }
-                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, 10 /* punctuation */);
-                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, 18 /* docCommentTagName */);
-                    pos = tag.tagName.end;
-                    switch (tag.kind) {
-                        case 275 /* JSDocParameterTag */:
-                            processJSDocParameterTag(tag);
-                            break;
-                        case 278 /* JSDocTemplateTag */:
-                            processJSDocTemplateTag(tag);
-                            break;
-                        case 277 /* JSDocTypeTag */:
-                            processElement(tag.typeExpression);
-                            break;
-                        case 276 /* JSDocReturnTag */:
-                            processElement(tag.typeExpression);
-                            break;
-                    }
-                    pos = tag.end;
-                }
-                if (pos !== docComment.end) {
-                    pushCommentRange(pos, docComment.end - pos);
-                }
-                return;
-                function processJSDocParameterTag(tag) {
-                    if (tag.preParameterName) {
-                        pushCommentRange(pos, tag.preParameterName.pos - pos);
-                        pushClassification(tag.preParameterName.pos, tag.preParameterName.end - tag.preParameterName.pos, 17 /* parameterName */);
-                        pos = tag.preParameterName.end;
-                    }
-                    if (tag.typeExpression) {
-                        pushCommentRange(pos, tag.typeExpression.pos - pos);
-                        processElement(tag.typeExpression);
-                        pos = tag.typeExpression.end;
-                    }
-                    if (tag.postParameterName) {
-                        pushCommentRange(pos, tag.postParameterName.pos - pos);
-                        pushClassification(tag.postParameterName.pos, tag.postParameterName.end - tag.postParameterName.pos, 17 /* parameterName */);
-                        pos = tag.postParameterName.end;
-                    }
-                }
-            }
-            function processJSDocTemplateTag(tag) {
-                for (var _i = 0, _a = tag.getChildren(); _i < _a.length; _i++) {
-                    var child = _a[_i];
-                    processElement(child);
-                }
-            }
-            function classifyDisabledMergeCode(text, start, end) {
-                // Classify the line that the ======= marker is on as a comment.  Then just lex
-                // all further tokens and add them to the result.
-                var i;
-                for (i = start; i < end; i++) {
-                    if (ts.isLineBreak(text.charCodeAt(i))) {
-                        break;
-                    }
-                }
-                pushClassification(start, i - start, 1 /* comment */);
-                mergeConflictScanner.setTextPos(i);
-                while (mergeConflictScanner.getTextPos() < end) {
-                    classifyDisabledCodeToken();
-                }
-            }
-            function classifyDisabledCodeToken() {
-                var start = mergeConflictScanner.getTextPos();
-                var tokenKind = mergeConflictScanner.scan();
-                var end = mergeConflictScanner.getTextPos();
-                var type = classifyTokenType(tokenKind);
-                if (type) {
-                    pushClassification(start, end - start, type);
-                }
-            }
-            /**
-             * Returns true if node should be treated as classified and no further processing is required.
-             * False will mean that node is not classified and traverse routine should recurse into node contents.
-             */
-            function tryClassifyNode(node) {
-                if (ts.nodeIsMissing(node)) {
-                    return true;
-                }
-                var classifiedElementName = tryClassifyJsxElementName(node);
-                if (!ts.isToken(node) && node.kind !== 244 /* JsxText */ && classifiedElementName === undefined) {
-                    return false;
-                }
-                var tokenStart = node.kind === 244 /* JsxText */ ? node.pos : classifyLeadingTriviaAndGetTokenStart(node);
-                var tokenWidth = node.end - tokenStart;
-                ts.Debug.assert(tokenWidth >= 0);
-                if (tokenWidth > 0) {
-                    var type = classifiedElementName || classifyTokenType(node.kind, node);
-                    if (type) {
-                        pushClassification(tokenStart, tokenWidth, type);
-                    }
-                }
-                return true;
-            }
-            function tryClassifyJsxElementName(token) {
-                switch (token.parent && token.parent.kind) {
-                    case 243 /* JsxOpeningElement */:
-                        if (token.parent.tagName === token) {
-                            return 19 /* jsxOpenTagName */;
-                        }
-                        break;
-                    case 245 /* JsxClosingElement */:
-                        if (token.parent.tagName === token) {
-                            return 20 /* jsxCloseTagName */;
-                        }
-                        break;
-                    case 242 /* JsxSelfClosingElement */:
-                        if (token.parent.tagName === token) {
-                            return 21 /* jsxSelfClosingTagName */;
-                        }
-                        break;
-                    case 246 /* JsxAttribute */:
-                        if (token.parent.name === token) {
-                            return 22 /* jsxAttribute */;
-                        }
-                        break;
-                }
-                return undefined;
-            }
-            // for accurate classification, the actual token should be passed in.  however, for
-            // cases like 'disabled merge code' classification, we just get the token kind and
-            // classify based on that instead.
-            function classifyTokenType(tokenKind, token) {
-                if (ts.isKeyword(tokenKind)) {
-                    return 3 /* keyword */;
-                }
-                // Special case < and >  If they appear in a generic context they are punctuation,
-                // not operators.
-                if (tokenKind === 25 /* LessThanToken */ || tokenKind === 27 /* GreaterThanToken */) {
-                    // If the node owning the token has a type argument list or type parameter list, then
-                    // we can effectively assume that a '<' and '>' belong to those lists.
-                    if (token && ts.getTypeArgumentOrTypeParameterList(token.parent)) {
-                        return 10 /* punctuation */;
-                    }
-                }
-                if (ts.isPunctuation(tokenKind)) {
-                    if (token) {
-                        if (tokenKind === 56 /* EqualsToken */) {
-                            // the '=' in a variable declaration is special cased here.
-                            if (token.parent.kind === 218 /* VariableDeclaration */ ||
-                                token.parent.kind === 145 /* PropertyDeclaration */ ||
-                                token.parent.kind === 142 /* Parameter */ ||
-                                token.parent.kind === 246 /* JsxAttribute */) {
-                                return 5 /* operator */;
-                            }
-                        }
-                        if (token.parent.kind === 187 /* BinaryExpression */ ||
-                            token.parent.kind === 185 /* PrefixUnaryExpression */ ||
-                            token.parent.kind === 186 /* PostfixUnaryExpression */ ||
-                            token.parent.kind === 188 /* ConditionalExpression */) {
-                            return 5 /* operator */;
-                        }
-                    }
-                    return 10 /* punctuation */;
-                }
-                else if (tokenKind === 8 /* NumericLiteral */) {
-                    return 4 /* numericLiteral */;
-                }
-                else if (tokenKind === 9 /* StringLiteral */ || tokenKind === 166 /* StringLiteralType */) {
-                    return token.parent.kind === 246 /* JsxAttribute */ ? 24 /* jsxAttributeStringLiteralValue */ : 6 /* stringLiteral */;
-                }
-                else if (tokenKind === 10 /* RegularExpressionLiteral */) {
-                    // TODO: we should get another classification type for these literals.
-                    return 6 /* stringLiteral */;
-                }
-                else if (ts.isTemplateLiteralKind(tokenKind)) {
-                    // TODO (drosen): we should *also* get another classification type for these literals.
-                    return 6 /* stringLiteral */;
-                }
-                else if (tokenKind === 244 /* JsxText */) {
-                    return 23 /* jsxText */;
-                }
-                else if (tokenKind === 69 /* Identifier */) {
-                    if (token) {
-                        switch (token.parent.kind) {
-                            case 221 /* ClassDeclaration */:
-                                if (token.parent.name === token) {
-                                    return 11 /* className */;
-                                }
-                                return;
-                            case 141 /* TypeParameter */:
-                                if (token.parent.name === token) {
-                                    return 15 /* typeParameterName */;
-                                }
-                                return;
-                            case 222 /* InterfaceDeclaration */:
-                                if (token.parent.name === token) {
-                                    return 13 /* interfaceName */;
-                                }
-                                return;
-                            case 224 /* EnumDeclaration */:
-                                if (token.parent.name === token) {
-                                    return 12 /* enumName */;
-                                }
-                                return;
-                            case 225 /* ModuleDeclaration */:
-                                if (token.parent.name === token) {
-                                    return 14 /* moduleName */;
-                                }
-                                return;
-                            case 142 /* Parameter */:
-                                if (token.parent.name === token) {
-                                    return 17 /* parameterName */;
-                                }
-                                return;
-                        }
-                    }
-                    return 2 /* identifier */;
-                }
-            }
-            function processElement(element) {
-                if (!element) {
-                    return;
-                }
-                // Ignore nodes that don't intersect the original span to classify.
-                if (ts.decodedTextSpanIntersectsWith(spanStart, spanLength, element.pos, element.getFullWidth())) {
-                    checkForClassificationCancellation(element.kind);
-                    var children = element.getChildren(sourceFile);
-                    for (var i = 0, n = children.length; i < n; i++) {
-                        var child = children[i];
-                        if (!tryClassifyNode(child)) {
-                            // Recurse into our child nodes.
-                            processElement(child);
-                        }
-                    }
-                }
-            }
-        }
-        function getOutliningSpans(fileName) {
-            // doesn't use compiler - no need to synchronize with host
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.OutliningElementsCollector.collectElements(sourceFile);
-        }
-        function getBraceMatchingAtPosition(fileName, position) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            var result = [];
-            var token = ts.getTouchingToken(sourceFile, position);
-            if (token.getStart(sourceFile) === position) {
-                var matchKind = getMatchingTokenKind(token);
-                // Ensure that there is a corresponding token to match ours.
-                if (matchKind) {
-                    var parentElement = token.parent;
-                    var childNodes = parentElement.getChildren(sourceFile);
-                    for (var _i = 0, childNodes_1 = childNodes; _i < childNodes_1.length; _i++) {
-                        var current = childNodes_1[_i];
-                        if (current.kind === matchKind) {
-                            var range1 = ts.createTextSpan(token.getStart(sourceFile), token.getWidth(sourceFile));
-                            var range2 = ts.createTextSpan(current.getStart(sourceFile), current.getWidth(sourceFile));
-                            // We want to order the braces when we return the result.
-                            if (range1.start < range2.start) {
-                                result.push(range1, range2);
-                            }
-                            else {
-                                result.push(range2, range1);
-                            }
-                            break;
-                        }
-                    }
-                }
-            }
-            return result;
-            function getMatchingTokenKind(token) {
-                switch (token.kind) {
-                    case 15 /* OpenBraceToken */: return 16 /* CloseBraceToken */;
-                    case 17 /* OpenParenToken */: return 18 /* CloseParenToken */;
-                    case 19 /* OpenBracketToken */: return 20 /* CloseBracketToken */;
-                    case 25 /* LessThanToken */: return 27 /* GreaterThanToken */;
-                    case 16 /* CloseBraceToken */: return 15 /* OpenBraceToken */;
-                    case 18 /* CloseParenToken */: return 17 /* OpenParenToken */;
-                    case 20 /* CloseBracketToken */: return 19 /* OpenBracketToken */;
-                    case 27 /* GreaterThanToken */: return 25 /* LessThanToken */;
-                }
-                return undefined;
-            }
-        }
-        function getIndentationAtPosition(fileName, position, editorOptions) {
-            var start = new Date().getTime();
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            log("getIndentationAtPosition: getCurrentSourceFile: " + (new Date().getTime() - start));
-            start = new Date().getTime();
-            var result = ts.formatting.SmartIndenter.getIndentation(position, sourceFile, editorOptions);
-            log("getIndentationAtPosition: computeIndentation  : " + (new Date().getTime() - start));
-            return result;
-        }
-        function getFormattingEditsForRange(fileName, start, end, options) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.formatting.formatSelection(start, end, sourceFile, getRuleProvider(options), options);
-        }
-        function getFormattingEditsForDocument(fileName, options) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.formatting.formatDocument(sourceFile, getRuleProvider(options), options);
-        }
-        function getFormattingEditsAfterKeystroke(fileName, position, key, options) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            if (key === "}") {
-                return ts.formatting.formatOnClosingCurly(position, sourceFile, getRuleProvider(options), options);
-            }
-            else if (key === ";") {
-                return ts.formatting.formatOnSemicolon(position, sourceFile, getRuleProvider(options), options);
-            }
-            else if (key === "\n") {
-                return ts.formatting.formatOnEnter(position, sourceFile, getRuleProvider(options), options);
-            }
-            return [];
-        }
-        /**
-         * Checks if position points to a valid position to add JSDoc comments, and if so,
-         * returns the appropriate template. Otherwise returns an empty string.
-         * Valid positions are
-         *      - outside of comments, statements, and expressions, and
-         *      - preceding a:
-         *          - function/constructor/method declaration
-         *          - class declarations
-         *          - variable statements
-         *          - namespace declarations
-         *
-         * Hosts should ideally check that:
-         * - The line is all whitespace up to 'position' before performing the insertion.
-         * - If the keystroke sequence "/\*\*" induced the call, we also check that the next
-         * non-whitespace character is '*', which (approximately) indicates whether we added
-         * the second '*' to complete an existing (JSDoc) comment.
-         * @param fileName The file in which to perform the check.
-         * @param position The (character-indexed) position in the file where the check should
-         * be performed.
-         */
-        function getDocCommentTemplateAtPosition(fileName, position) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            // Check if in a context where we don't want to perform any insertion
-            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position) || ts.hasDocComment(sourceFile, position)) {
-                return undefined;
-            }
-            var tokenAtPos = ts.getTokenAtPosition(sourceFile, position);
-            var tokenStart = tokenAtPos.getStart();
-            if (!tokenAtPos || tokenStart < position) {
-                return undefined;
-            }
-            // TODO: add support for:
-            // - enums/enum members
-            // - interfaces
-            // - property declarations
-            // - potentially property assignments
-            var commentOwner;
-            findOwner: for (commentOwner = tokenAtPos; commentOwner; commentOwner = commentOwner.parent) {
-                switch (commentOwner.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 148 /* Constructor */:
-                    case 221 /* ClassDeclaration */:
-                    case 200 /* VariableStatement */:
-                        break findOwner;
-                    case 256 /* SourceFile */:
-                        return undefined;
-                    case 225 /* ModuleDeclaration */:
-                        // If in walking up the tree, we hit a a nested namespace declaration,
-                        // then we must be somewhere within a dotted namespace name; however we don't
-                        // want to give back a JSDoc template for the 'b' or 'c' in 'namespace a.b.c { }'.
-                        if (commentOwner.parent.kind === 225 /* ModuleDeclaration */) {
-                            return undefined;
-                        }
-                        break findOwner;
-                }
-            }
-            if (!commentOwner || commentOwner.getStart() < position) {
-                return undefined;
-            }
-            var parameters = getParametersForJsDocOwningNode(commentOwner);
-            var posLineAndChar = sourceFile.getLineAndCharacterOfPosition(position);
-            var lineStart = sourceFile.getLineStarts()[posLineAndChar.line];
-            var indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character);
-            var newLine = ts.getNewLineOrDefaultFromHost(host);
-            var docParams = "";
-            for (var i = 0, numParams = parameters.length; i < numParams; i++) {
-                var currentName = parameters[i].name;
-                var paramName = currentName.kind === 69 /* Identifier */ ?
-                    currentName.text :
-                    "param" + i;
-                docParams += indentationStr + " * @param " + paramName + newLine;
-            }
-            // A doc comment consists of the following
-            // * The opening comment line
-            // * the first line (without a param) for the object's untagged info (this is also where the caret ends up)
-            // * the '@param'-tagged lines
-            // * TODO: other tags.
-            // * the closing comment line
-            // * if the caret was directly in front of the object, then we add an extra line and indentation.
-            var preamble = "/**" + newLine +
-                indentationStr + " * ";
-            var result = preamble + newLine +
-                docParams +
-                indentationStr + " */" +
-                (tokenStart === position ? newLine + indentationStr : "");
-            return { newText: result, caretOffset: preamble.length };
-        }
-        function isValidBraceCompletionAtPostion(fileName, position, openingBrace) {
-            // '<' is currently not supported, figuring out if we're in a Generic Type vs. a comparison is too 
-            // expensive to do during typing scenarios
-            // i.e. whether we're dealing with:
-            //      var x = new foo<| ( with class foo<T>{} )
-            // or 
-            //      var y = 3 <|
-            if (openingBrace === 60 /* lessThan */) {
-                return false;
-            }
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            // Check if in a context where we don't want to perform any insertion
-            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position)) {
-                return false;
-            }
-            if (ts.isInsideJsxElementOrAttribute(sourceFile, position)) {
-                return openingBrace === 123 /* openBrace */;
-            }
-            if (ts.isInTemplateString(sourceFile, position)) {
-                return false;
-            }
-            return true;
-        }
-        function getParametersForJsDocOwningNode(commentOwner) {
-            if (ts.isFunctionLike(commentOwner)) {
-                return commentOwner.parameters;
-            }
-            if (commentOwner.kind === 200 /* VariableStatement */) {
-                var varStatement = commentOwner;
-                var varDeclarations = varStatement.declarationList.declarations;
-                if (varDeclarations.length === 1 && varDeclarations[0].initializer) {
-                    return getParametersFromRightHandSideOfAssignment(varDeclarations[0].initializer);
-                }
-            }
-            return emptyArray;
-        }
-        /**
-         * Digs into an an initializer or RHS operand of an assignment operation
-         * to get the parameters of an apt signature corresponding to a
-         * function expression or a class expression.
-         *
-         * @param rightHandSide the expression which may contain an appropriate set of parameters
-         * @returns the parameters of a signature found on the RHS if one exists; otherwise 'emptyArray'.
-         */
-        function getParametersFromRightHandSideOfAssignment(rightHandSide) {
-            while (rightHandSide.kind === 178 /* ParenthesizedExpression */) {
-                rightHandSide = rightHandSide.expression;
-            }
-            switch (rightHandSide.kind) {
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return rightHandSide.parameters;
-                case 192 /* ClassExpression */:
-                    for (var _i = 0, _a = rightHandSide.members; _i < _a.length; _i++) {
-                        var member = _a[_i];
-                        if (member.kind === 148 /* Constructor */) {
-                            return member.parameters;
-                        }
-                    }
-                    break;
-            }
-            return emptyArray;
-        }
-        function getTodoComments(fileName, descriptors) {
-            // Note: while getting todo comments seems like a syntactic operation, we actually
-            // treat it as a semantic operation here.  This is because we expect our host to call
-            // this on every single file.  If we treat this syntactically, then that will cause
-            // us to populate and throw away the tree in our syntax tree cache for each file.  By
-            // treating this as a semantic operation, we can access any tree without throwing
-            // anything away.
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            cancellationToken.throwIfCancellationRequested();
-            var fileContents = sourceFile.text;
-            var result = [];
-            if (descriptors.length > 0) {
-                var regExp = getTodoCommentsRegExp();
-                var matchArray = void 0;
-                while (matchArray = regExp.exec(fileContents)) {
-                    cancellationToken.throwIfCancellationRequested();
-                    // If we got a match, here is what the match array will look like.  Say the source text is:
-                    //
-                    //      "    // hack   1"
-                    //
-                    // The result array with the regexp:    will be:
-                    //
-                    //      ["// hack   1", "// ", "hack   1", undefined, "hack"]
-                    //
-                    // Here are the relevant capture groups:
-                    //  0) The full match for the entire regexp.
-                    //  1) The preamble to the message portion.
-                    //  2) The message portion.
-                    //  3...N) The descriptor that was matched - by index.  'undefined' for each
-                    //         descriptor that didn't match.  an actual value if it did match.
-                    //
-                    //  i.e. 'undefined' in position 3 above means TODO(jason) didn't match.
-                    //       "hack"      in position 4 means HACK did match.
-                    var firstDescriptorCaptureIndex = 3;
-                    ts.Debug.assert(matchArray.length === descriptors.length + firstDescriptorCaptureIndex);
-                    var preamble = matchArray[1];
-                    var matchPosition = matchArray.index + preamble.length;
-                    // OK, we have found a match in the file.  This is only an acceptable match if
-                    // it is contained within a comment.
-                    var token = ts.getTokenAtPosition(sourceFile, matchPosition);
-                    if (!isInsideComment(sourceFile, token, matchPosition)) {
-                        continue;
-                    }
-                    var descriptor = undefined;
-                    for (var i = 0, n = descriptors.length; i < n; i++) {
-                        if (matchArray[i + firstDescriptorCaptureIndex]) {
-                            descriptor = descriptors[i];
-                        }
-                    }
-                    ts.Debug.assert(descriptor !== undefined);
-                    // We don't want to match something like 'TODOBY', so we make sure a non
-                    // letter/digit follows the match.
-                    if (isLetterOrDigit(fileContents.charCodeAt(matchPosition + descriptor.text.length))) {
-                        continue;
-                    }
-                    var message = matchArray[2];
-                    result.push({
-                        descriptor: descriptor,
-                        message: message,
-                        position: matchPosition
-                    });
-                }
-            }
-            return result;
-            function escapeRegExp(str) {
-                return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
-            }
-            function getTodoCommentsRegExp() {
-                // NOTE: ?:  means 'non-capture group'.  It allows us to have groups without having to
-                // filter them out later in the final result array.
-                // TODO comments can appear in one of the following forms:
-                //
-                //  1)      // TODO     or  /////////// TODO
-                //
-                //  2)      /* TODO     or  /********** TODO
-                //
-                //  3)      /*
-                //           *   TODO
-                //           */
-                //
-                // The following three regexps are used to match the start of the text up to the TODO
-                // comment portion.
-                var singleLineCommentStart = /(?:\/\/+\s*)/.source;
-                var multiLineCommentStart = /(?:\/\*+\s*)/.source;
-                var anyNumberOfSpacesAndAsterisksAtStartOfLine = /(?:^(?:\s|\*)*)/.source;
-                // Match any of the above three TODO comment start regexps.
-                // Note that the outermost group *is* a capture group.  We want to capture the preamble
-                // so that we can determine the starting position of the TODO comment match.
-                var preamble = "(" + anyNumberOfSpacesAndAsterisksAtStartOfLine + "|" + singleLineCommentStart + "|" + multiLineCommentStart + ")";
-                // Takes the descriptors and forms a regexp that matches them as if they were literals.
-                // For example, if the descriptors are "TODO(jason)" and "HACK", then this will be:
-                //
-                //      (?:(TODO\(jason\))|(HACK))
-                //
-                // Note that the outermost group is *not* a capture group, but the innermost groups
-                // *are* capture groups.  By capturing the inner literals we can determine after
-                // matching which descriptor we are dealing with.
-                var literals = "(?:" + ts.map(descriptors, function (d) { return "(" + escapeRegExp(d.text) + ")"; }).join("|") + ")";
-                // After matching a descriptor literal, the following regexp matches the rest of the
-                // text up to the end of the line (or */).
-                var endOfLineOrEndOfComment = /(?:$|\*\/)/.source;
-                var messageRemainder = /(?:.*?)/.source;
-                // This is the portion of the match we'll return as part of the TODO comment result. We
-                // match the literal portion up to the end of the line or end of comment.
-                var messagePortion = "(" + literals + messageRemainder + ")";
-                var regExpString = preamble + messagePortion + endOfLineOrEndOfComment;
-                // The final regexp will look like this:
-                // /((?:\/\/+\s*)|(?:\/\*+\s*)|(?:^(?:\s|\*)*))((?:(TODO\(jason\))|(HACK))(?:.*?))(?:$|\*\/)/gim
-                // The flags of the regexp are important here.
-                //  'g' is so that we are doing a global search and can find matches several times
-                //  in the input.
-                //
-                //  'i' is for case insensitivity (We do this to match C# TODO comment code).
-                //
-                //  'm' is so we can find matches in a multi-line input.
-                return new RegExp(regExpString, "gim");
-            }
-            function isLetterOrDigit(char) {
-                return (char >= 97 /* a */ && char <= 122 /* z */) ||
-                    (char >= 65 /* A */ && char <= 90 /* Z */) ||
-                    (char >= 48 /* _0 */ && char <= 57 /* _9 */);
-            }
-        }
-        function getStringLiteralTypeForNode(node, typeChecker) {
-            var searchNode = node.parent.kind === 166 /* StringLiteralType */ ? node.parent : node;
-            var type = typeChecker.getTypeAtLocation(searchNode);
-            if (type && type.flags & 256 /* StringLiteral */) {
-                return type;
-            }
-            return undefined;
-        }
-        function getRenameInfo(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var typeChecker = program.getTypeChecker();
-            var defaultLibFileName = host.getDefaultLibFileName(host.getCompilationSettings());
-            var canonicalDefaultLibName = getCanonicalFileName(ts.normalizePath(defaultLibFileName));
-            var node = ts.getTouchingWord(sourceFile, position);
-            // Can only rename an identifier.
-            if (node) {
-                if (node.kind === 69 /* Identifier */ ||
-                    node.kind === 9 /* StringLiteral */ ||
-                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                    var symbol = typeChecker.getSymbolAtLocation(node);
-                    // Only allow a symbol to be renamed if it actually has at least one declaration.
-                    if (symbol) {
-                        var declarations = symbol.getDeclarations();
-                        if (declarations && declarations.length > 0) {
-                            // Disallow rename for elements that are defined in the standard TypeScript library.
-                            if (ts.forEach(declarations, isDefinedInLibraryFile)) {
-                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                            }
-                            var displayName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
-                            var kind = getSymbolKind(symbol, node);
-                            if (kind) {
-                                return {
-                                    canRename: true,
-                                    kind: kind,
-                                    displayName: displayName,
-                                    localizedErrorMessage: undefined,
-                                    fullDisplayName: typeChecker.getFullyQualifiedName(symbol),
-                                    kindModifiers: getSymbolModifiers(symbol),
-                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                                };
-                            }
-                        }
-                    }
-                    else if (node.kind === 9 /* StringLiteral */) {
-                        var type = getStringLiteralTypeForNode(node, typeChecker);
-                        if (type) {
-                            if (isDefinedInLibraryFile(node)) {
-                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                            }
-                            else {
-                                var displayName = ts.stripQuotes(type.text);
-                                return {
-                                    canRename: true,
-                                    kind: ScriptElementKind.variableElement,
-                                    displayName: displayName,
-                                    localizedErrorMessage: undefined,
-                                    fullDisplayName: displayName,
-                                    kindModifiers: ScriptElementKindModifier.none,
-                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                                };
-                            }
-                        }
-                    }
-                }
-            }
-            return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_this_element));
-            function getRenameInfoError(localizedErrorMessage) {
-                return {
-                    canRename: false,
-                    localizedErrorMessage: localizedErrorMessage,
-                    displayName: undefined,
-                    fullDisplayName: undefined,
-                    kind: undefined,
-                    kindModifiers: undefined,
-                    triggerSpan: undefined
-                };
-            }
-            function isDefinedInLibraryFile(declaration) {
-                if (defaultLibFileName) {
-                    var sourceFile_3 = declaration.getSourceFile();
-                    var canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile_3.fileName));
-                    if (canonicalName === canonicalDefaultLibName) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function createTriggerSpanForNode(node, sourceFile) {
-                var start = node.getStart(sourceFile);
-                var width = node.getWidth(sourceFile);
-                if (node.kind === 9 /* StringLiteral */) {
-                    // Exclude the quotes
-                    start += 1;
-                    width -= 2;
-                }
-                return ts.createTextSpan(start, width);
-            }
-        }
-        return {
-            dispose: dispose,
-            cleanupSemanticCache: cleanupSemanticCache,
-            getSyntacticDiagnostics: getSyntacticDiagnostics,
-            getSemanticDiagnostics: getSemanticDiagnostics,
-            getCompilerOptionsDiagnostics: getCompilerOptionsDiagnostics,
-            getSyntacticClassifications: getSyntacticClassifications,
-            getSemanticClassifications: getSemanticClassifications,
-            getEncodedSyntacticClassifications: getEncodedSyntacticClassifications,
-            getEncodedSemanticClassifications: getEncodedSemanticClassifications,
-            getCompletionsAtPosition: getCompletionsAtPosition,
-            getCompletionEntryDetails: getCompletionEntryDetails,
-            getSignatureHelpItems: getSignatureHelpItems,
-            getQuickInfoAtPosition: getQuickInfoAtPosition,
-            getDefinitionAtPosition: getDefinitionAtPosition,
-            getTypeDefinitionAtPosition: getTypeDefinitionAtPosition,
-            getReferencesAtPosition: getReferencesAtPosition,
-            findReferences: findReferences,
-            getOccurrencesAtPosition: getOccurrencesAtPosition,
-            getDocumentHighlights: getDocumentHighlights,
-            getNameOrDottedNameSpan: getNameOrDottedNameSpan,
-            getBreakpointStatementAtPosition: getBreakpointStatementAtPosition,
-            getNavigateToItems: getNavigateToItems,
-            getRenameInfo: getRenameInfo,
-            findRenameLocations: findRenameLocations,
-            getNavigationBarItems: getNavigationBarItems,
-            getOutliningSpans: getOutliningSpans,
-            getTodoComments: getTodoComments,
-            getBraceMatchingAtPosition: getBraceMatchingAtPosition,
-            getIndentationAtPosition: getIndentationAtPosition,
-            getFormattingEditsForRange: getFormattingEditsForRange,
-            getFormattingEditsForDocument: getFormattingEditsForDocument,
-            getFormattingEditsAfterKeystroke: getFormattingEditsAfterKeystroke,
-            getDocCommentTemplateAtPosition: getDocCommentTemplateAtPosition,
-            isValidBraceCompletionAtPostion: isValidBraceCompletionAtPostion,
-            getEmitOutput: getEmitOutput,
-            getNonBoundSourceFile: getNonBoundSourceFile,
-            getProgram: getProgram
-        };
-    }
-    ts.createLanguageService = createLanguageService;
-    /* @internal */
-    function getNameTable(sourceFile) {
-        if (!sourceFile.nameTable) {
-            initializeNameTable(sourceFile);
-        }
-        return sourceFile.nameTable;
-    }
-    ts.getNameTable = getNameTable;
-    function initializeNameTable(sourceFile) {
-        var nameTable = {};
-        walk(sourceFile);
-        sourceFile.nameTable = nameTable;
-        function walk(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                    nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
-                    break;
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                    // We want to store any numbers/strings if they were a name that could be
-                    // related to a declaration.  So, if we have 'import x = require("something")'
-                    // then we want 'something' to be in the name table.  Similarly, if we have
-                    // "a['propname']" then we want to store "propname" in the name table.
-                    if (ts.isDeclarationName(node) ||
-                        node.parent.kind === 240 /* ExternalModuleReference */ ||
-                        isArgumentOfElementAccessExpression(node) ||
-                        ts.isLiteralComputedPropertyDeclarationName(node)) {
-                        nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
-                    }
-                    break;
-                default:
-                    ts.forEachChild(node, walk);
-            }
-        }
-    }
-    function isArgumentOfElementAccessExpression(node) {
-        return node &&
-            node.parent &&
-            node.parent.kind === 173 /* ElementAccessExpression */ &&
-            node.parent.argumentExpression === node;
-    }
-    /// Classifier
-    function createClassifier() {
-        var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false);
-        /// We do not have a full parser support to know when we should parse a regex or not
-        /// If we consider every slash token to be a regex, we could be missing cases like "1/2/3", where
-        /// we have a series of divide operator. this list allows us to be more accurate by ruling out
-        /// locations where a regexp cannot exist.
-        var noRegexTable = [];
-        noRegexTable[69 /* Identifier */] = true;
-        noRegexTable[9 /* StringLiteral */] = true;
-        noRegexTable[8 /* NumericLiteral */] = true;
-        noRegexTable[10 /* RegularExpressionLiteral */] = true;
-        noRegexTable[97 /* ThisKeyword */] = true;
-        noRegexTable[41 /* PlusPlusToken */] = true;
-        noRegexTable[42 /* MinusMinusToken */] = true;
-        noRegexTable[18 /* CloseParenToken */] = true;
-        noRegexTable[20 /* CloseBracketToken */] = true;
-        noRegexTable[16 /* CloseBraceToken */] = true;
-        noRegexTable[99 /* TrueKeyword */] = true;
-        noRegexTable[84 /* FalseKeyword */] = true;
-        // Just a stack of TemplateHeads and OpenCurlyBraces, used to perform rudimentary (inexact)
-        // classification on template strings. Because of the context free nature of templates,
-        // the only precise way to classify a template portion would be by propagating the stack across
-        // lines, just as we do with the end-of-line state. However, this is a burden for implementers,
-        // and the behavior is entirely subsumed by the syntactic classifier anyway, so we instead
-        // flatten any nesting when the template stack is non-empty and encode it in the end-of-line state.
-        // Situations in which this fails are
-        //  1) When template strings are nested across different lines:
-        //          `hello ${ `world
-        //          ` }`
-        //
-        //     Where on the second line, you will get the closing of a template,
-        //     a closing curly, and a new template.
-        //
-        //  2) When substitution expressions have curly braces and the curly brace falls on the next line:
-        //          `hello ${ () => {
-        //          return "world" } } `
-        //
-        //     Where on the second line, you will get the 'return' keyword,
-        //     a string literal, and a template end consisting of '} } `'.
-        var templateStack = [];
-        /** Returns true if 'keyword2' can legally follow 'keyword1' in any language construct. */
-        function canFollow(keyword1, keyword2) {
-            if (ts.isAccessibilityModifier(keyword1)) {
-                if (keyword2 === 123 /* GetKeyword */ ||
-                    keyword2 === 131 /* SetKeyword */ ||
-                    keyword2 === 121 /* ConstructorKeyword */ ||
-                    keyword2 === 113 /* StaticKeyword */) {
-                    // Allow things like "public get", "public constructor" and "public static".
-                    // These are all legal.
-                    return true;
-                }
-                // Any other keyword following "public" is actually an identifier an not a real
-                // keyword.
-                return false;
-            }
-            // Assume any other keyword combination is legal.  This can be refined in the future
-            // if there are more cases we want the classifier to be better at.
-            return true;
-        }
-        function convertClassifications(classifications, text) {
-            var entries = [];
-            var dense = classifications.spans;
-            var lastEnd = 0;
-            for (var i = 0, n = dense.length; i < n; i += 3) {
-                var start = dense[i];
-                var length_3 = dense[i + 1];
-                var type = dense[i + 2];
-                // Make a whitespace entry between the last item and this one.
-                if (lastEnd >= 0) {
-                    var whitespaceLength_1 = start - lastEnd;
-                    if (whitespaceLength_1 > 0) {
-                        entries.push({ length: whitespaceLength_1, classification: TokenClass.Whitespace });
-                    }
-                }
-                entries.push({ length: length_3, classification: convertClassification(type) });
-                lastEnd = start + length_3;
-            }
-            var whitespaceLength = text.length - lastEnd;
-            if (whitespaceLength > 0) {
-                entries.push({ length: whitespaceLength, classification: TokenClass.Whitespace });
-            }
-            return { entries: entries, finalLexState: classifications.endOfLineState };
-        }
-        function convertClassification(type) {
-            switch (type) {
-                case 1 /* comment */: return TokenClass.Comment;
-                case 3 /* keyword */: return TokenClass.Keyword;
-                case 4 /* numericLiteral */: return TokenClass.NumberLiteral;
-                case 5 /* operator */: return TokenClass.Operator;
-                case 6 /* stringLiteral */: return TokenClass.StringLiteral;
-                case 8 /* whiteSpace */: return TokenClass.Whitespace;
-                case 10 /* punctuation */: return TokenClass.Punctuation;
-                case 2 /* identifier */:
-                case 11 /* className */:
-                case 12 /* enumName */:
-                case 13 /* interfaceName */:
-                case 14 /* moduleName */:
-                case 15 /* typeParameterName */:
-                case 16 /* typeAliasName */:
-                case 9 /* text */:
-                case 17 /* parameterName */:
-                default:
-                    return TokenClass.Identifier;
-            }
-        }
-        function getClassificationsForLine(text, lexState, syntacticClassifierAbsent) {
-            return convertClassifications(getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent), text);
-        }
-        // If there is a syntactic classifier ('syntacticClassifierAbsent' is false),
-        // we will be more conservative in order to avoid conflicting with the syntactic classifier.
-        function getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent) {
-            var offset = 0;
-            var token = 0 /* Unknown */;
-            var lastNonTriviaToken = 0 /* Unknown */;
-            // Empty out the template stack for reuse.
-            while (templateStack.length > 0) {
-                templateStack.pop();
-            }
-            // If we're in a string literal, then prepend: "\
-            // (and a newline).  That way when we lex we'll think we're still in a string literal.
-            //
-            // If we're in a multiline comment, then prepend: /*
-            // (and a newline).  That way when we lex we'll think we're still in a multiline comment.
-            switch (lexState) {
-                case 3 /* InDoubleQuoteStringLiteral */:
-                    text = "\"\\\n" + text;
-                    offset = 3;
-                    break;
-                case 2 /* InSingleQuoteStringLiteral */:
-                    text = "'\\\n" + text;
-                    offset = 3;
-                    break;
-                case 1 /* InMultiLineCommentTrivia */:
-                    text = "/*\n" + text;
-                    offset = 3;
-                    break;
-                case 4 /* InTemplateHeadOrNoSubstitutionTemplate */:
-                    text = "`\n" + text;
-                    offset = 2;
-                    break;
-                case 5 /* InTemplateMiddleOrTail */:
-                    text = "}\n" + text;
-                    offset = 2;
-                // fallthrough
-                case 6 /* InTemplateSubstitutionPosition */:
-                    templateStack.push(12 /* TemplateHead */);
-                    break;
-            }
-            scanner.setText(text);
-            var result = {
-                endOfLineState: 0 /* None */,
-                spans: []
-            };
-            // We can run into an unfortunate interaction between the lexical and syntactic classifier
-            // when the user is typing something generic.  Consider the case where the user types:
-            //
-            //      Foo<number
-            //
-            // From the lexical classifier's perspective, 'number' is a keyword, and so the word will
-            // be classified as such.  However, from the syntactic classifier's tree-based perspective
-            // this is simply an expression with the identifier 'number' on the RHS of the less than
-            // token.  So the classification will go back to being an identifier.  The moment the user
-            // types again, number will become a keyword, then an identifier, etc. etc.
-            //
-            // To try to avoid this problem, we avoid classifying contextual keywords as keywords
-            // when the user is potentially typing something generic.  We just can't do a good enough
-            // job at the lexical level, and so well leave it up to the syntactic classifier to make
-            // the determination.
-            //
-            // In order to determine if the user is potentially typing something generic, we use a
-            // weak heuristic where we track < and > tokens.  It's a weak heuristic, but should
-            // work well enough in practice.
-            var angleBracketStack = 0;
-            do {
-                token = scanner.scan();
-                if (!ts.isTrivia(token)) {
-                    if ((token === 39 /* SlashToken */ || token === 61 /* SlashEqualsToken */) && !noRegexTable[lastNonTriviaToken]) {
-                        if (scanner.reScanSlashToken() === 10 /* RegularExpressionLiteral */) {
-                            token = 10 /* RegularExpressionLiteral */;
-                        }
-                    }
-                    else if (lastNonTriviaToken === 21 /* DotToken */ && isKeyword(token)) {
-                        token = 69 /* Identifier */;
-                    }
-                    else if (isKeyword(lastNonTriviaToken) && isKeyword(token) && !canFollow(lastNonTriviaToken, token)) {
-                        // We have two keywords in a row.  Only treat the second as a keyword if
-                        // it's a sequence that could legally occur in the language.  Otherwise
-                        // treat it as an identifier.  This way, if someone writes "private var"
-                        // we recognize that 'var' is actually an identifier here.
-                        token = 69 /* Identifier */;
-                    }
-                    else if (lastNonTriviaToken === 69 /* Identifier */ &&
-                        token === 25 /* LessThanToken */) {
-                        // Could be the start of something generic.  Keep track of that by bumping
-                        // up the current count of generic contexts we may be in.
-                        angleBracketStack++;
-                    }
-                    else if (token === 27 /* GreaterThanToken */ && angleBracketStack > 0) {
-                        // If we think we're currently in something generic, then mark that that
-                        // generic entity is complete.
-                        angleBracketStack--;
-                    }
-                    else if (token === 117 /* AnyKeyword */ ||
-                        token === 132 /* StringKeyword */ ||
-                        token === 130 /* NumberKeyword */ ||
-                        token === 120 /* BooleanKeyword */ ||
-                        token === 133 /* SymbolKeyword */) {
-                        if (angleBracketStack > 0 && !syntacticClassifierAbsent) {
-                            // If it looks like we're could be in something generic, don't classify this
-                            // as a keyword.  We may just get overwritten by the syntactic classifier,
-                            // causing a noisy experience for the user.
-                            token = 69 /* Identifier */;
-                        }
-                    }
-                    else if (token === 12 /* TemplateHead */) {
-                        templateStack.push(token);
-                    }
-                    else if (token === 15 /* OpenBraceToken */) {
-                        // If we don't have anything on the template stack,
-                        // then we aren't trying to keep track of a previously scanned template head.
-                        if (templateStack.length > 0) {
-                            templateStack.push(token);
-                        }
-                    }
-                    else if (token === 16 /* CloseBraceToken */) {
-                        // If we don't have anything on the template stack,
-                        // then we aren't trying to keep track of a previously scanned template head.
-                        if (templateStack.length > 0) {
-                            var lastTemplateStackToken = ts.lastOrUndefined(templateStack);
-                            if (lastTemplateStackToken === 12 /* TemplateHead */) {
-                                token = scanner.reScanTemplateToken();
-                                // Only pop on a TemplateTail; a TemplateMiddle indicates there is more for us.
-                                if (token === 14 /* TemplateTail */) {
-                                    templateStack.pop();
-                                }
-                                else {
-                                    ts.Debug.assert(token === 13 /* TemplateMiddle */, "Should have been a template middle. Was " + token);
-                                }
-                            }
-                            else {
-                                ts.Debug.assert(lastTemplateStackToken === 15 /* OpenBraceToken */, "Should have been an open brace. Was: " + token);
-                                templateStack.pop();
-                            }
-                        }
-                    }
-                    lastNonTriviaToken = token;
-                }
-                processToken();
-            } while (token !== 1 /* EndOfFileToken */);
-            return result;
-            function processToken() {
-                var start = scanner.getTokenPos();
-                var end = scanner.getTextPos();
-                addResult(start, end, classFromKind(token));
-                if (end >= text.length) {
-                    if (token === 9 /* StringLiteral */ || token === 166 /* StringLiteralType */) {
-                        // Check to see if we finished up on a multiline string literal.
-                        var tokenText = scanner.getTokenText();
-                        if (scanner.isUnterminated()) {
-                            var lastCharIndex = tokenText.length - 1;
-                            var numBackslashes = 0;
-                            while (tokenText.charCodeAt(lastCharIndex - numBackslashes) === 92 /* backslash */) {
-                                numBackslashes++;
-                            }
-                            // If we have an odd number of backslashes, then the multiline string is unclosed
-                            if (numBackslashes & 1) {
-                                var quoteChar = tokenText.charCodeAt(0);
-                                result.endOfLineState = quoteChar === 34 /* doubleQuote */
-                                    ? 3 /* InDoubleQuoteStringLiteral */
-                                    : 2 /* InSingleQuoteStringLiteral */;
-                            }
-                        }
-                    }
-                    else if (token === 3 /* MultiLineCommentTrivia */) {
-                        // Check to see if the multiline comment was unclosed.
-                        if (scanner.isUnterminated()) {
-                            result.endOfLineState = 1 /* InMultiLineCommentTrivia */;
-                        }
-                    }
-                    else if (ts.isTemplateLiteralKind(token)) {
-                        if (scanner.isUnterminated()) {
-                            if (token === 14 /* TemplateTail */) {
-                                result.endOfLineState = 5 /* InTemplateMiddleOrTail */;
-                            }
-                            else if (token === 11 /* NoSubstitutionTemplateLiteral */) {
-                                result.endOfLineState = 4 /* InTemplateHeadOrNoSubstitutionTemplate */;
-                            }
-                            else {
-                                ts.Debug.fail("Only 'NoSubstitutionTemplateLiteral's and 'TemplateTail's can be unterminated; got SyntaxKind #" + token);
-                            }
-                        }
-                    }
-                    else if (templateStack.length > 0 && ts.lastOrUndefined(templateStack) === 12 /* TemplateHead */) {
-                        result.endOfLineState = 6 /* InTemplateSubstitutionPosition */;
-                    }
-                }
-            }
-            function addResult(start, end, classification) {
-                if (classification === 8 /* whiteSpace */) {
-                    // Don't bother with whitespace classifications.  They're not needed.
-                    return;
-                }
-                if (start === 0 && offset > 0) {
-                    // We're classifying the first token, and this was a case where we prepended
-                    // text.  We should consider the start of this token to be at the start of
-                    // the original text.
-                    start += offset;
-                }
-                // All our tokens are in relation to the augmented text.  Move them back to be
-                // relative to the original text.
-                start -= offset;
-                end -= offset;
-                var length = end - start;
-                if (length > 0) {
-                    result.spans.push(start);
-                    result.spans.push(length);
-                    result.spans.push(classification);
-                }
-            }
-        }
-        function isBinaryExpressionOperatorToken(token) {
-            switch (token) {
-                case 37 /* AsteriskToken */:
-                case 39 /* SlashToken */:
-                case 40 /* PercentToken */:
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 43 /* LessThanLessThanToken */:
-                case 44 /* GreaterThanGreaterThanToken */:
-                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                case 25 /* LessThanToken */:
-                case 27 /* GreaterThanToken */:
-                case 28 /* LessThanEqualsToken */:
-                case 29 /* GreaterThanEqualsToken */:
-                case 91 /* InstanceOfKeyword */:
-                case 90 /* InKeyword */:
-                case 116 /* AsKeyword */:
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                case 46 /* AmpersandToken */:
-                case 48 /* CaretToken */:
-                case 47 /* BarToken */:
-                case 51 /* AmpersandAmpersandToken */:
-                case 52 /* BarBarToken */:
-                case 67 /* BarEqualsToken */:
-                case 66 /* AmpersandEqualsToken */:
-                case 68 /* CaretEqualsToken */:
-                case 63 /* LessThanLessThanEqualsToken */:
-                case 64 /* GreaterThanGreaterThanEqualsToken */:
-                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                case 57 /* PlusEqualsToken */:
-                case 58 /* MinusEqualsToken */:
-                case 59 /* AsteriskEqualsToken */:
-                case 61 /* SlashEqualsToken */:
-                case 62 /* PercentEqualsToken */:
-                case 56 /* EqualsToken */:
-                case 24 /* CommaToken */:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-        function isPrefixUnaryExpressionOperatorToken(token) {
-            switch (token) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                case 41 /* PlusPlusToken */:
-                case 42 /* MinusMinusToken */:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-        function isKeyword(token) {
-            return token >= 70 /* FirstKeyword */ && token <= 138 /* LastKeyword */;
-        }
-        function classFromKind(token) {
-            if (isKeyword(token)) {
-                return 3 /* keyword */;
-            }
-            else if (isBinaryExpressionOperatorToken(token) || isPrefixUnaryExpressionOperatorToken(token)) {
-                return 5 /* operator */;
-            }
-            else if (token >= 15 /* FirstPunctuation */ && token <= 68 /* LastPunctuation */) {
-                return 10 /* punctuation */;
-            }
-            switch (token) {
-                case 8 /* NumericLiteral */:
-                    return 4 /* numericLiteral */;
-                case 9 /* StringLiteral */:
-                case 166 /* StringLiteralType */:
-                    return 6 /* stringLiteral */;
-                case 10 /* RegularExpressionLiteral */:
-                    return 7 /* regularExpressionLiteral */;
-                case 7 /* ConflictMarkerTrivia */:
-                case 3 /* MultiLineCommentTrivia */:
-                case 2 /* SingleLineCommentTrivia */:
-                    return 1 /* comment */;
-                case 5 /* WhitespaceTrivia */:
-                case 4 /* NewLineTrivia */:
-                    return 8 /* whiteSpace */;
-                case 69 /* Identifier */:
-                default:
-                    if (ts.isTemplateLiteralKind(token)) {
-                        return 6 /* stringLiteral */;
-                    }
-                    return 2 /* identifier */;
-            }
-        }
-        return {
-            getClassificationsForLine: getClassificationsForLine,
-            getEncodedLexicalClassifications: getEncodedLexicalClassifications
-        };
-    }
-    ts.createClassifier = createClassifier;
-    /**
-      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
-      * node package.
-      * The functionality is not supported if the ts module is consumed outside of a node module.
-      */
-    function getDefaultLibFilePath(options) {
-        // Check __dirname is defined and that we are on a node.js system.
-        if (typeof __dirname !== "undefined") {
-            return __dirname + ts.directorySeparator + ts.getDefaultLibFileName(options);
-        }
-        throw new Error("getDefaultLibFilePath is only supported when consumed as a node module. ");
-    }
-    ts.getDefaultLibFilePath = getDefaultLibFilePath;
-    function initializeServices() {
-        ts.objectAllocator = {
-            getNodeConstructor: function () { return NodeObject; },
-            getSourceFileConstructor: function () { return SourceFileObject; },
-            getSymbolConstructor: function () { return SymbolObject; },
-            getTypeConstructor: function () { return TypeObject; },
-            getSignatureConstructor: function () { return SignatureObject; }
-        };
-    }
-    initializeServices();
-})(ts || (ts = {}));
-// Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0. 
-// See LICENSE.txt in the project root for complete license information.
-/// <reference path='services.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var BreakpointResolver;
-    (function (BreakpointResolver) {
-        /**
-         * Get the breakpoint span in given sourceFile
-         */
-        function spanInSourceFileAtLocation(sourceFile, position) {
-            // Cannot set breakpoint in dts file
-            if (sourceFile.isDeclarationFile) {
-                return undefined;
-            }
-            var tokenAtLocation = ts.getTokenAtPosition(sourceFile, position);
-            var lineOfPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
-            if (sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getStart(sourceFile)).line > lineOfPosition) {
-                // Get previous token if the token is returned starts on new line
-                // eg: let x =10; |--- cursor is here
-                //     let y = 10; 
-                // token at position will return let keyword on second line as the token but we would like to use 
-                // token on same line if trailing trivia (comments or white spaces on same line) part of the last token on that line
-                tokenAtLocation = ts.findPrecedingToken(tokenAtLocation.pos, sourceFile);
-                // It's a blank line
-                if (!tokenAtLocation || sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getEnd()).line !== lineOfPosition) {
-                    return undefined;
-                }
-            }
-            // Cannot set breakpoint in ambient declarations
-            if (ts.isInAmbientContext(tokenAtLocation)) {
-                return undefined;
-            }
-            // Get the span in the node based on its syntax
-            return spanInNode(tokenAtLocation);
-            function textSpan(startNode, endNode) {
-                var start = startNode.decorators ?
-                    ts.skipTrivia(sourceFile.text, startNode.decorators.end) :
-                    startNode.getStart(sourceFile);
-                return ts.createTextSpanFromBounds(start, (endNode || startNode).getEnd());
-            }
-            function textSpanEndingAtNextToken(startNode, previousTokenToFindNextEndToken) {
-                return textSpan(startNode, ts.findNextToken(previousTokenToFindNextEndToken, previousTokenToFindNextEndToken.parent));
-            }
-            function spanInNodeIfStartsOnSameLine(node, otherwiseOnNode) {
-                if (node && lineOfPosition === sourceFile.getLineAndCharacterOfPosition(node.getStart(sourceFile)).line) {
-                    return spanInNode(node);
-                }
-                return spanInNode(otherwiseOnNode);
-            }
-            function spanInNodeArray(nodeArray) {
-                return ts.createTextSpanFromBounds(ts.skipTrivia(sourceFile.text, nodeArray.pos), nodeArray.end);
-            }
-            function spanInPreviousNode(node) {
-                return spanInNode(ts.findPrecedingToken(node.pos, sourceFile));
-            }
-            function spanInNextNode(node) {
-                return spanInNode(ts.findNextToken(node, node.parent));
-            }
-            function spanInNode(node) {
-                if (node) {
-                    switch (node.kind) {
-                        case 200 /* VariableStatement */:
-                            // Span on first variable declaration
-                            return spanInVariableDeclaration(node.declarationList.declarations[0]);
-                        case 218 /* VariableDeclaration */:
-                        case 145 /* PropertyDeclaration */:
-                        case 144 /* PropertySignature */:
-                            return spanInVariableDeclaration(node);
-                        case 142 /* Parameter */:
-                            return spanInParameterDeclaration(node);
-                        case 220 /* FunctionDeclaration */:
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                        case 148 /* Constructor */:
-                        case 179 /* FunctionExpression */:
-                        case 180 /* ArrowFunction */:
-                            return spanInFunctionDeclaration(node);
-                        case 199 /* Block */:
-                            if (ts.isFunctionBlock(node)) {
-                                return spanInFunctionBlock(node);
-                            }
-                        // Fall through
-                        case 226 /* ModuleBlock */:
-                            return spanInBlock(node);
-                        case 252 /* CatchClause */:
-                            return spanInBlock(node.block);
-                        case 202 /* ExpressionStatement */:
-                            // span on the expression
-                            return textSpan(node.expression);
-                        case 211 /* ReturnStatement */:
-                            // span on return keyword and expression if present
-                            return textSpan(node.getChildAt(0), node.expression);
-                        case 205 /* WhileStatement */:
-                            // Span on while(...)
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 204 /* DoStatement */:
-                            // span in statement of the do statement
-                            return spanInNode(node.statement);
-                        case 217 /* DebuggerStatement */:
-                            // span on debugger keyword
-                            return textSpan(node.getChildAt(0));
-                        case 203 /* IfStatement */:
-                            // set on if(..) span
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 214 /* LabeledStatement */:
-                            // span in statement
-                            return spanInNode(node.statement);
-                        case 210 /* BreakStatement */:
-                        case 209 /* ContinueStatement */:
-                            // On break or continue keyword and label if present
-                            return textSpan(node.getChildAt(0), node.label);
-                        case 206 /* ForStatement */:
-                            return spanInForStatement(node);
-                        case 207 /* ForInStatement */:
-                            // span of for (a in ...)
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 208 /* ForOfStatement */:
-                            // span in initializer
-                            return spanInInitializerOfForLike(node);
-                        case 213 /* SwitchStatement */:
-                            // span on switch(...)
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 249 /* CaseClause */:
-                        case 250 /* DefaultClause */:
-                            // span in first statement of the clause
-                            return spanInNode(node.statements[0]);
-                        case 216 /* TryStatement */:
-                            // span in try block
-                            return spanInBlock(node.tryBlock);
-                        case 215 /* ThrowStatement */:
-                            // span in throw ...
-                            return textSpan(node, node.expression);
-                        case 235 /* ExportAssignment */:
-                            // span on export = id
-                            return textSpan(node, node.expression);
-                        case 229 /* ImportEqualsDeclaration */:
-                            // import statement without including semicolon
-                            return textSpan(node, node.moduleReference);
-                        case 230 /* ImportDeclaration */:
-                            // import statement without including semicolon
-                            return textSpan(node, node.moduleSpecifier);
-                        case 236 /* ExportDeclaration */:
-                            // import statement without including semicolon
-                            return textSpan(node, node.moduleSpecifier);
-                        case 225 /* ModuleDeclaration */:
-                            // span on complete module if it is instantiated
-                            if (ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
-                                return undefined;
-                            }
-                        case 221 /* ClassDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                        case 255 /* EnumMember */:
-                        case 169 /* BindingElement */:
-                            // span on complete node
-                            return textSpan(node);
-                        case 212 /* WithStatement */:
-                            // span in statement
-                            return spanInNode(node.statement);
-                        case 143 /* Decorator */:
-                            return spanInNodeArray(node.parent.decorators);
-                        case 167 /* ObjectBindingPattern */:
-                        case 168 /* ArrayBindingPattern */:
-                            return spanInBindingPattern(node);
-                        // No breakpoint in interface, type alias
-                        case 222 /* InterfaceDeclaration */:
-                        case 223 /* TypeAliasDeclaration */:
-                            return undefined;
-                        // Tokens:
-                        case 23 /* SemicolonToken */:
-                        case 1 /* EndOfFileToken */:
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile));
-                        case 24 /* CommaToken */:
-                            return spanInPreviousNode(node);
-                        case 15 /* OpenBraceToken */:
-                            return spanInOpenBraceToken(node);
-                        case 16 /* CloseBraceToken */:
-                            return spanInCloseBraceToken(node);
-                        case 20 /* CloseBracketToken */:
-                            return spanInCloseBracketToken(node);
-                        case 17 /* OpenParenToken */:
-                            return spanInOpenParenToken(node);
-                        case 18 /* CloseParenToken */:
-                            return spanInCloseParenToken(node);
-                        case 54 /* ColonToken */:
-                            return spanInColonToken(node);
-                        case 27 /* GreaterThanToken */:
-                        case 25 /* LessThanToken */:
-                            return spanInGreaterThanOrLessThanToken(node);
-                        // Keywords:
-                        case 104 /* WhileKeyword */:
-                            return spanInWhileKeyword(node);
-                        case 80 /* ElseKeyword */:
-                        case 72 /* CatchKeyword */:
-                        case 85 /* FinallyKeyword */:
-                            return spanInNextNode(node);
-                        case 138 /* OfKeyword */:
-                            return spanInOfKeyword(node);
-                        default:
-                            // Destructuring pattern in destructuring assignment
-                            // [a, b, c] of
-                            // [a, b, c] = expression
-                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node)) {
-                                return spanInArrayLiteralOrObjectLiteralDestructuringPattern(node);
-                            }
-                            // Set breakpoint on identifier element of destructuring pattern
-                            // a or ...c  or d: x from 
-                            // [a, b, ...c] or { a, b } or { d: x } from destructuring pattern
-                            if ((node.kind === 69 /* Identifier */ ||
-                                node.kind == 191 /* SpreadElementExpression */ ||
-                                node.kind === 253 /* PropertyAssignment */ ||
-                                node.kind === 254 /* ShorthandPropertyAssignment */) &&
-                                ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
-                                return textSpan(node);
-                            }
-                            if (node.kind === 187 /* BinaryExpression */) {
-                                var binaryExpression = node;
-                                // Set breakpoint in destructuring pattern if its destructuring assignment
-                                // [a, b, c] or {a, b, c} of
-                                // [a, b, c] = expression or 
-                                // {a, b, c} = expression
-                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left)) {
-                                    return spanInArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left);
-                                }
-                                if (binaryExpression.operatorToken.kind === 56 /* EqualsToken */ &&
-                                    ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.parent)) {
-                                    // Set breakpoint on assignment expression element of destructuring pattern
-                                    // a = expression of 
-                                    // [a = expression, b, c] = someExpression or 
-                                    // { a = expression, b, c } = someExpression
-                                    return textSpan(node);
-                                }
-                                if (binaryExpression.operatorToken.kind === 24 /* CommaToken */) {
-                                    return spanInNode(binaryExpression.left);
-                                }
-                            }
-                            if (ts.isExpression(node)) {
-                                switch (node.parent.kind) {
-                                    case 204 /* DoStatement */:
-                                        // Set span as if on while keyword
-                                        return spanInPreviousNode(node);
-                                    case 143 /* Decorator */:
-                                        // Set breakpoint on the decorator emit
-                                        return spanInNode(node.parent);
-                                    case 206 /* ForStatement */:
-                                    case 208 /* ForOfStatement */:
-                                        return textSpan(node);
-                                    case 187 /* BinaryExpression */:
-                                        if (node.parent.operatorToken.kind === 24 /* CommaToken */) {
-                                            // If this is a comma expression, the breakpoint is possible in this expression
-                                            return textSpan(node);
-                                        }
-                                        break;
-                                    case 180 /* ArrowFunction */:
-                                        if (node.parent.body === node) {
-                                            // If this is body of arrow function, it is allowed to have the breakpoint
-                                            return textSpan(node);
-                                        }
-                                        break;
-                                }
-                            }
-                            // If this is name of property assignment, set breakpoint in the initializer
-                            if (node.parent.kind === 253 /* PropertyAssignment */ &&
-                                node.parent.name === node &&
-                                !ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.parent)) {
-                                return spanInNode(node.parent.initializer);
-                            }
-                            // Breakpoint in type assertion goes to its operand
-                            if (node.parent.kind === 177 /* TypeAssertionExpression */ && node.parent.type === node) {
-                                return spanInNextNode(node.parent.type);
-                            }
-                            // return type of function go to previous token
-                            if (ts.isFunctionLike(node.parent) && node.parent.type === node) {
-                                return spanInPreviousNode(node);
-                            }
-                            // initializer of variable/parameter declaration go to previous node
-                            if ((node.parent.kind === 218 /* VariableDeclaration */ ||
-                                node.parent.kind === 142 /* Parameter */)) {
-                                var paramOrVarDecl = node.parent;
-                                if (paramOrVarDecl.initializer === node ||
-                                    paramOrVarDecl.type === node ||
-                                    ts.isAssignmentOperator(node.kind)) {
-                                    return spanInPreviousNode(node);
-                                }
-                            }
-                            if (node.parent.kind === 187 /* BinaryExpression */) {
-                                var binaryExpression = node.parent;
-                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left) &&
-                                    (binaryExpression.right === node ||
-                                        binaryExpression.operatorToken === node)) {
-                                    // If initializer of destructuring assignment move to previous token
-                                    return spanInPreviousNode(node);
-                                }
-                            }
-                            // Default go to parent to set the breakpoint
-                            return spanInNode(node.parent);
-                    }
-                }
-                function textSpanFromVariableDeclaration(variableDeclaration) {
-                    var declarations = variableDeclaration.parent.declarations;
-                    if (declarations && declarations[0] === variableDeclaration) {
-                        // First declaration - include let keyword
-                        return textSpan(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent), variableDeclaration);
-                    }
-                    else {
-                        // Span only on this declaration
-                        return textSpan(variableDeclaration);
-                    }
-                }
-                function spanInVariableDeclaration(variableDeclaration) {
-                    // If declaration of for in statement, just set the span in parent
-                    if (variableDeclaration.parent.parent.kind === 207 /* ForInStatement */) {
-                        return spanInNode(variableDeclaration.parent.parent);
-                    }
-                    // If this is a destructuring pattern, set breakpoint in binding pattern
-                    if (ts.isBindingPattern(variableDeclaration.name)) {
-                        return spanInBindingPattern(variableDeclaration.name);
-                    }
-                    // Breakpoint is possible in variableDeclaration only if there is initialization
-                    // or its declaration from 'for of'
-                    if (variableDeclaration.initializer ||
-                        (variableDeclaration.flags & 1 /* Export */) ||
-                        variableDeclaration.parent.parent.kind === 208 /* ForOfStatement */) {
-                        return textSpanFromVariableDeclaration(variableDeclaration);
-                    }
-                    var declarations = variableDeclaration.parent.declarations;
-                    if (declarations && declarations[0] !== variableDeclaration) {
-                        // If we cannot set breakpoint on this declaration, set it on previous one
-                        // Because the variable declaration may be binding pattern and 
-                        // we would like to set breakpoint in last binding element if that's the case,
-                        // use preceding token instead
-                        return spanInNode(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent));
-                    }
-                }
-                function canHaveSpanInParameterDeclaration(parameter) {
-                    // Breakpoint is possible on parameter only if it has initializer, is a rest parameter, or has public or private modifier
-                    return !!parameter.initializer || parameter.dotDotDotToken !== undefined ||
-                        !!(parameter.flags & 4 /* Public */) || !!(parameter.flags & 8 /* Private */);
-                }
-                function spanInParameterDeclaration(parameter) {
-                    if (ts.isBindingPattern(parameter.name)) {
-                        // Set breakpoint in binding pattern
-                        return spanInBindingPattern(parameter.name);
-                    }
-                    else if (canHaveSpanInParameterDeclaration(parameter)) {
-                        return textSpan(parameter);
-                    }
-                    else {
-                        var functionDeclaration = parameter.parent;
-                        var indexOfParameter = ts.indexOf(functionDeclaration.parameters, parameter);
-                        if (indexOfParameter) {
-                            // Not a first parameter, go to previous parameter
-                            return spanInParameterDeclaration(functionDeclaration.parameters[indexOfParameter - 1]);
-                        }
-                        else {
-                            // Set breakpoint in the function declaration body
-                            return spanInNode(functionDeclaration.body);
-                        }
-                    }
-                }
-                function canFunctionHaveSpanInWholeDeclaration(functionDeclaration) {
-                    return !!(functionDeclaration.flags & 1 /* Export */) ||
-                        (functionDeclaration.parent.kind === 221 /* ClassDeclaration */ && functionDeclaration.kind !== 148 /* Constructor */);
-                }
-                function spanInFunctionDeclaration(functionDeclaration) {
-                    // No breakpoints in the function signature
-                    if (!functionDeclaration.body) {
-                        return undefined;
-                    }
-                    if (canFunctionHaveSpanInWholeDeclaration(functionDeclaration)) {
-                        // Set the span on whole function declaration
-                        return textSpan(functionDeclaration);
-                    }
-                    // Set span in function body
-                    return spanInNode(functionDeclaration.body);
-                }
-                function spanInFunctionBlock(block) {
-                    var nodeForSpanInBlock = block.statements.length ? block.statements[0] : block.getLastToken();
-                    if (canFunctionHaveSpanInWholeDeclaration(block.parent)) {
-                        return spanInNodeIfStartsOnSameLine(block.parent, nodeForSpanInBlock);
-                    }
-                    return spanInNode(nodeForSpanInBlock);
-                }
-                function spanInBlock(block) {
-                    switch (block.parent.kind) {
-                        case 225 /* ModuleDeclaration */:
-                            if (ts.getModuleInstanceState(block.parent) !== 1 /* Instantiated */) {
-                                return undefined;
-                            }
-                        // Set on parent if on same line otherwise on first statement
-                        case 205 /* WhileStatement */:
-                        case 203 /* IfStatement */:
-                        case 207 /* ForInStatement */:
-                            return spanInNodeIfStartsOnSameLine(block.parent, block.statements[0]);
-                        // Set span on previous token if it starts on same line otherwise on the first statement of the block
-                        case 206 /* ForStatement */:
-                        case 208 /* ForOfStatement */:
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(block.pos, sourceFile, block.parent), block.statements[0]);
-                    }
-                    // Default action is to set on first statement
-                    return spanInNode(block.statements[0]);
-                }
-                function spanInInitializerOfForLike(forLikeStatement) {
-                    if (forLikeStatement.initializer.kind === 219 /* VariableDeclarationList */) {
-                        // Declaration list - set breakpoint in first declaration
-                        var variableDeclarationList = forLikeStatement.initializer;
-                        if (variableDeclarationList.declarations.length > 0) {
-                            return spanInNode(variableDeclarationList.declarations[0]);
-                        }
-                    }
-                    else {
-                        // Expression - set breakpoint in it
-                        return spanInNode(forLikeStatement.initializer);
-                    }
-                }
-                function spanInForStatement(forStatement) {
-                    if (forStatement.initializer) {
-                        return spanInInitializerOfForLike(forStatement);
-                    }
-                    if (forStatement.condition) {
-                        return textSpan(forStatement.condition);
-                    }
-                    if (forStatement.incrementor) {
-                        return textSpan(forStatement.incrementor);
-                    }
-                }
-                function spanInBindingPattern(bindingPattern) {
-                    // Set breakpoint in first binding element
-                    var firstBindingElement = ts.forEach(bindingPattern.elements, function (element) { return element.kind !== 193 /* OmittedExpression */ ? element : undefined; });
-                    if (firstBindingElement) {
-                        return spanInNode(firstBindingElement);
-                    }
-                    // Empty binding pattern of binding element, set breakpoint on binding element
-                    if (bindingPattern.parent.kind === 169 /* BindingElement */) {
-                        return textSpan(bindingPattern.parent);
-                    }
-                    // Variable declaration is used as the span
-                    return textSpanFromVariableDeclaration(bindingPattern.parent);
-                }
-                function spanInArrayLiteralOrObjectLiteralDestructuringPattern(node) {
-                    ts.Debug.assert(node.kind !== 168 /* ArrayBindingPattern */ && node.kind !== 167 /* ObjectBindingPattern */);
-                    var elements = node.kind === 170 /* ArrayLiteralExpression */ ?
-                        node.elements :
-                        node.properties;
-                    var firstBindingElement = ts.forEach(elements, function (element) { return element.kind !== 193 /* OmittedExpression */ ? element : undefined; });
-                    if (firstBindingElement) {
-                        return spanInNode(firstBindingElement);
-                    }
-                    // Could be ArrayLiteral from destructuring assignment or 
-                    // just nested element in another destructuring assignment
-                    // set breakpoint on assignment when parent is destructuring assignment
-                    // Otherwise set breakpoint for this element
-                    return textSpan(node.parent.kind === 187 /* BinaryExpression */ ? node.parent : node);
-                }
-                // Tokens:
-                function spanInOpenBraceToken(node) {
-                    switch (node.parent.kind) {
-                        case 224 /* EnumDeclaration */:
-                            var enumDeclaration = node.parent;
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), enumDeclaration.members.length ? enumDeclaration.members[0] : enumDeclaration.getLastToken(sourceFile));
-                        case 221 /* ClassDeclaration */:
-                            var classDeclaration = node.parent;
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), classDeclaration.members.length ? classDeclaration.members[0] : classDeclaration.getLastToken(sourceFile));
-                        case 227 /* CaseBlock */:
-                            return spanInNodeIfStartsOnSameLine(node.parent.parent, node.parent.clauses[0]);
-                    }
-                    // Default to parent node
-                    return spanInNode(node.parent);
-                }
-                function spanInCloseBraceToken(node) {
-                    switch (node.parent.kind) {
-                        case 226 /* ModuleBlock */:
-                            // If this is not an instantiated module block, no bp span
-                            if (ts.getModuleInstanceState(node.parent.parent) !== 1 /* Instantiated */) {
-                                return undefined;
-                            }
-                        case 224 /* EnumDeclaration */:
-                        case 221 /* ClassDeclaration */:
-                            // Span on close brace token
-                            return textSpan(node);
-                        case 199 /* Block */:
-                            if (ts.isFunctionBlock(node.parent)) {
-                                // Span on close brace token
-                                return textSpan(node);
-                            }
-                        // fall through
-                        case 252 /* CatchClause */:
-                            return spanInNode(ts.lastOrUndefined(node.parent.statements));
-                        case 227 /* CaseBlock */:
-                            // breakpoint in last statement of the last clause
-                            var caseBlock = node.parent;
-                            var lastClause = ts.lastOrUndefined(caseBlock.clauses);
-                            if (lastClause) {
-                                return spanInNode(ts.lastOrUndefined(lastClause.statements));
-                            }
-                            return undefined;
-                        case 167 /* ObjectBindingPattern */:
-                            // Breakpoint in last binding element or binding pattern if it contains no elements
-                            var bindingPattern = node.parent;
-                            return spanInNode(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
-                        // Default to parent node
-                        default:
-                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
-                                // Breakpoint in last binding element or binding pattern if it contains no elements
-                                var objectLiteral = node.parent;
-                                return textSpan(ts.lastOrUndefined(objectLiteral.properties) || objectLiteral);
-                            }
-                            return spanInNode(node.parent);
-                    }
-                }
-                function spanInCloseBracketToken(node) {
-                    switch (node.parent.kind) {
-                        case 168 /* ArrayBindingPattern */:
-                            // Breakpoint in last binding element or binding pattern if it contains no elements
-                            var bindingPattern = node.parent;
-                            return textSpan(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
-                        default:
-                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
-                                // Breakpoint in last binding element or binding pattern if it contains no elements
-                                var arrayLiteral = node.parent;
-                                return textSpan(ts.lastOrUndefined(arrayLiteral.elements) || arrayLiteral);
-                            }
-                            // Default to parent node
-                            return spanInNode(node.parent);
-                    }
-                }
-                function spanInOpenParenToken(node) {
-                    if (node.parent.kind === 204 /* DoStatement */ ||
-                        node.parent.kind === 174 /* CallExpression */ ||
-                        node.parent.kind === 175 /* NewExpression */) {
-                        return spanInPreviousNode(node);
-                    }
-                    if (node.parent.kind === 178 /* ParenthesizedExpression */) {
-                        return spanInNextNode(node);
-                    }
-                    // Default to parent node
-                    return spanInNode(node.parent);
-                }
-                function spanInCloseParenToken(node) {
-                    // Is this close paren token of parameter list, set span in previous token
-                    switch (node.parent.kind) {
-                        case 179 /* FunctionExpression */:
-                        case 220 /* FunctionDeclaration */:
-                        case 180 /* ArrowFunction */:
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                        case 148 /* Constructor */:
-                        case 205 /* WhileStatement */:
-                        case 204 /* DoStatement */:
-                        case 206 /* ForStatement */:
-                        case 208 /* ForOfStatement */:
-                        case 174 /* CallExpression */:
-                        case 175 /* NewExpression */:
-                        case 178 /* ParenthesizedExpression */:
-                            return spanInPreviousNode(node);
-                        // Default to parent node
-                        default:
-                            return spanInNode(node.parent);
-                    }
-                }
-                function spanInColonToken(node) {
-                    // Is this : specifying return annotation of the function declaration
-                    if (ts.isFunctionLike(node.parent) ||
-                        node.parent.kind === 253 /* PropertyAssignment */ ||
-                        node.parent.kind === 142 /* Parameter */) {
-                        return spanInPreviousNode(node);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInGreaterThanOrLessThanToken(node) {
-                    if (node.parent.kind === 177 /* TypeAssertionExpression */) {
-                        return spanInNextNode(node);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInWhileKeyword(node) {
-                    if (node.parent.kind === 204 /* DoStatement */) {
-                        // Set span on while expression
-                        return textSpanEndingAtNextToken(node, node.parent.expression);
-                    }
-                    // Default to parent node
-                    return spanInNode(node.parent);
-                }
-                function spanInOfKeyword(node) {
-                    if (node.parent.kind === 208 /* ForOfStatement */) {
-                        // Set using next token
-                        return spanInNextNode(node);
-                    }
-                    // Default to parent node
-                    return spanInNode(node.parent);
-                }
-            }
-        }
-        BreakpointResolver.spanInSourceFileAtLocation = spanInSourceFileAtLocation;
-    })(BreakpointResolver = ts.BreakpointResolver || (ts.BreakpointResolver = {}));
-})(ts || (ts = {}));
-//
-// Copyright (c) Microsoft Corporation.  All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//   http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-/// <reference path='services.ts' />
-/* @internal */
-var debugObjectHost = this;
-// We need to use 'null' to interface with the managed side.
-/* tslint:disable:no-null-keyword */
-/* tslint:disable:no-in-operator */
-/* @internal */
-var ts;
-(function (ts) {
-    function logInternalError(logger, err) {
-        if (logger) {
-            logger.log("*INTERNAL ERROR* - Exception in typescript services: " + err.message);
-        }
-    }
-    var ScriptSnapshotShimAdapter = (function () {
-        function ScriptSnapshotShimAdapter(scriptSnapshotShim) {
-            this.scriptSnapshotShim = scriptSnapshotShim;
-        }
-        ScriptSnapshotShimAdapter.prototype.getText = function (start, end) {
-            return this.scriptSnapshotShim.getText(start, end);
-        };
-        ScriptSnapshotShimAdapter.prototype.getLength = function () {
-            return this.scriptSnapshotShim.getLength();
-        };
-        ScriptSnapshotShimAdapter.prototype.getChangeRange = function (oldSnapshot) {
-            var oldSnapshotShim = oldSnapshot;
-            var encoded = this.scriptSnapshotShim.getChangeRange(oldSnapshotShim.scriptSnapshotShim);
-            // TODO: should this be '==='?
-            if (encoded == null) {
-                return null;
-            }
-            var decoded = JSON.parse(encoded);
-            return ts.createTextChangeRange(ts.createTextSpan(decoded.span.start, decoded.span.length), decoded.newLength);
-        };
-        ScriptSnapshotShimAdapter.prototype.dispose = function () {
-            // if scriptSnapshotShim is a COM object then property check becomes method call with no arguments
-            // 'in' does not have this effect
-            if ("dispose" in this.scriptSnapshotShim) {
-                this.scriptSnapshotShim.dispose();
-            }
-        };
-        return ScriptSnapshotShimAdapter;
-    }());
-    var LanguageServiceShimHostAdapter = (function () {
-        function LanguageServiceShimHostAdapter(shimHost) {
-            var _this = this;
-            this.shimHost = shimHost;
-            this.loggingEnabled = false;
-            this.tracingEnabled = false;
-            // if shimHost is a COM object then property check will become method call with no arguments.
-            // 'in' does not have this effect. 
-            if ("getModuleResolutionsForFile" in this.shimHost) {
-                this.resolveModuleNames = function (moduleNames, containingFile) {
-                    var resolutionsInFile = JSON.parse(_this.shimHost.getModuleResolutionsForFile(containingFile));
-                    return ts.map(moduleNames, function (name) {
-                        var result = ts.lookUp(resolutionsInFile, name);
-                        return result ? { resolvedFileName: result } : undefined;
-                    });
-                };
-            }
-            if ("directoryExists" in this.shimHost) {
-                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
-            }
-            if ("getTypeReferenceDirectiveResolutionsForFile" in this.shimHost) {
-                this.resolveTypeReferenceDirectives = function (typeDirectiveNames, containingFile) {
-                    var typeDirectivesForFile = JSON.parse(_this.shimHost.getTypeReferenceDirectiveResolutionsForFile(containingFile));
-                    return ts.map(typeDirectiveNames, function (name) { return ts.lookUp(typeDirectivesForFile, name); });
-                };
-            }
-        }
-        LanguageServiceShimHostAdapter.prototype.log = function (s) {
-            if (this.loggingEnabled) {
-                this.shimHost.log(s);
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.trace = function (s) {
-            if (this.tracingEnabled) {
-                this.shimHost.trace(s);
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.error = function (s) {
-            this.shimHost.error(s);
-        };
-        LanguageServiceShimHostAdapter.prototype.getProjectVersion = function () {
-            if (!this.shimHost.getProjectVersion) {
-                // shimmed host does not support getProjectVersion
-                return undefined;
-            }
-            return this.shimHost.getProjectVersion();
-        };
-        LanguageServiceShimHostAdapter.prototype.useCaseSensitiveFileNames = function () {
-            return this.shimHost.useCaseSensitiveFileNames ? this.shimHost.useCaseSensitiveFileNames() : false;
-        };
-        LanguageServiceShimHostAdapter.prototype.getCompilationSettings = function () {
-            var settingsJson = this.shimHost.getCompilationSettings();
-            // TODO: should this be '==='?
-            if (settingsJson == null || settingsJson == "") {
-                throw Error("LanguageServiceShimHostAdapter.getCompilationSettings: empty compilationSettings");
-            }
-            return JSON.parse(settingsJson);
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptFileNames = function () {
-            var encoded = this.shimHost.getScriptFileNames();
-            return this.files = JSON.parse(encoded);
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptSnapshot = function (fileName) {
-            var scriptSnapshot = this.shimHost.getScriptSnapshot(fileName);
-            return scriptSnapshot && new ScriptSnapshotShimAdapter(scriptSnapshot);
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptKind = function (fileName) {
-            if ("getScriptKind" in this.shimHost) {
-                return this.shimHost.getScriptKind(fileName);
-            }
-            else {
-                return 0 /* Unknown */;
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptVersion = function (fileName) {
-            return this.shimHost.getScriptVersion(fileName);
-        };
-        LanguageServiceShimHostAdapter.prototype.getLocalizedDiagnosticMessages = function () {
-            var diagnosticMessagesJson = this.shimHost.getLocalizedDiagnosticMessages();
-            if (diagnosticMessagesJson == null || diagnosticMessagesJson == "") {
-                return null;
-            }
-            try {
-                return JSON.parse(diagnosticMessagesJson);
-            }
-            catch (e) {
-                this.log(e.description || "diagnosticMessages.generated.json has invalid JSON format");
-                return null;
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.getCancellationToken = function () {
-            var hostCancellationToken = this.shimHost.getCancellationToken();
-            return new ThrottledCancellationToken(hostCancellationToken);
-        };
-        LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
-            return this.shimHost.getCurrentDirectory();
-        };
-        LanguageServiceShimHostAdapter.prototype.getDirectories = function (path) {
-            return this.shimHost.getDirectories(path);
-        };
-        LanguageServiceShimHostAdapter.prototype.getDefaultLibFileName = function (options) {
-            return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
-        };
-        return LanguageServiceShimHostAdapter;
-    }());
-    ts.LanguageServiceShimHostAdapter = LanguageServiceShimHostAdapter;
-    /** A cancellation that throttles calls to the host */
-    var ThrottledCancellationToken = (function () {
-        function ThrottledCancellationToken(hostCancellationToken) {
-            this.hostCancellationToken = hostCancellationToken;
-            // Store when we last tried to cancel.  Checking cancellation can be expensive (as we have
-            // to marshall over to the host layer).  So we only bother actually checking once enough
-            // time has passed.
-            this.lastCancellationCheckTime = 0;
-        }
-        ThrottledCancellationToken.prototype.isCancellationRequested = function () {
-            var time = Date.now();
-            var duration = Math.abs(time - this.lastCancellationCheckTime);
-            if (duration > 10) {
-                // Check no more than once every 10 ms.
-                this.lastCancellationCheckTime = time;
-                return this.hostCancellationToken.isCancellationRequested();
-            }
-            return false;
-        };
-        return ThrottledCancellationToken;
-    }());
-    var CoreServicesShimHostAdapter = (function () {
-        function CoreServicesShimHostAdapter(shimHost) {
-            var _this = this;
-            this.shimHost = shimHost;
-            if ("directoryExists" in this.shimHost) {
-                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
-            }
-            if ("realpath" in this.shimHost) {
-                this.realpath = function (path) { return _this.shimHost.realpath(path); };
-            }
-        }
-        CoreServicesShimHostAdapter.prototype.readDirectory = function (rootDir, extension, exclude, depth) {
-            // Wrap the API changes for 2.0 release. This try/catch
-            // should be removed once TypeScript 2.0 has shipped.
-            var encoded;
-            try {
-                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude), depth);
-            }
-            catch (e) {
-                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude));
-            }
-            return JSON.parse(encoded);
-        };
-        CoreServicesShimHostAdapter.prototype.fileExists = function (fileName) {
-            return this.shimHost.fileExists(fileName);
-        };
-        CoreServicesShimHostAdapter.prototype.readFile = function (fileName) {
-            return this.shimHost.readFile(fileName);
-        };
-        return CoreServicesShimHostAdapter;
-    }());
-    ts.CoreServicesShimHostAdapter = CoreServicesShimHostAdapter;
-    function simpleForwardCall(logger, actionDescription, action, logPerformance) {
-        var start;
-        if (logPerformance) {
-            logger.log(actionDescription);
-            start = Date.now();
-        }
-        var result = action();
-        if (logPerformance) {
-            var end = Date.now();
-            logger.log(actionDescription + " completed in " + (end - start) + " msec");
-            if (typeof result === "string") {
-                var str = result;
-                if (str.length > 128) {
-                    str = str.substring(0, 128) + "...";
-                }
-                logger.log("  result.length=" + str.length + ", result='" + JSON.stringify(str) + "'");
-            }
-        }
-        return result;
-    }
-    function forwardJSONCall(logger, actionDescription, action, logPerformance) {
-        try {
-            var result = simpleForwardCall(logger, actionDescription, action, logPerformance);
-            return JSON.stringify({ result: result });
-        }
-        catch (err) {
-            if (err instanceof ts.OperationCanceledException) {
-                return JSON.stringify({ canceled: true });
-            }
-            logInternalError(logger, err);
-            err.description = actionDescription;
-            return JSON.stringify({ error: err });
-        }
-    }
-    var ShimBase = (function () {
-        function ShimBase(factory) {
-            this.factory = factory;
-            factory.registerShim(this);
-        }
-        ShimBase.prototype.dispose = function (dummy) {
-            this.factory.unregisterShim(this);
-        };
-        return ShimBase;
-    }());
-    function realizeDiagnostics(diagnostics, newLine) {
-        return diagnostics.map(function (d) { return realizeDiagnostic(d, newLine); });
-    }
-    ts.realizeDiagnostics = realizeDiagnostics;
-    function realizeDiagnostic(diagnostic, newLine) {
-        return {
-            message: ts.flattenDiagnosticMessageText(diagnostic.messageText, newLine),
-            start: diagnostic.start,
-            length: diagnostic.length,
-            /// TODO: no need for the tolowerCase call
-            category: ts.DiagnosticCategory[diagnostic.category].toLowerCase(),
-            code: diagnostic.code
-        };
-    }
-    var LanguageServiceShimObject = (function (_super) {
-        __extends(LanguageServiceShimObject, _super);
-        function LanguageServiceShimObject(factory, host, languageService) {
-            _super.call(this, factory);
-            this.host = host;
-            this.languageService = languageService;
-            this.logPerformance = false;
-            this.logger = this.host;
-        }
-        LanguageServiceShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
-            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
-        };
-        /// DISPOSE
-        /**
-         * Ensure (almost) deterministic release of internal Javascript resources when
-         * some external native objects holds onto us (e.g. Com/Interop).
-         */
-        LanguageServiceShimObject.prototype.dispose = function (dummy) {
-            this.logger.log("dispose()");
-            this.languageService.dispose();
-            this.languageService = null;
-            // force a GC
-            if (debugObjectHost && debugObjectHost.CollectGarbage) {
-                debugObjectHost.CollectGarbage();
-                this.logger.log("CollectGarbage()");
-            }
-            this.logger = null;
-            _super.prototype.dispose.call(this, dummy);
-        };
-        /// REFRESH
-        /**
-         * Update the list of scripts known to the compiler
-         */
-        LanguageServiceShimObject.prototype.refresh = function (throwOnError) {
-            this.forwardJSONCall("refresh(" + throwOnError + ")", function () { return null; });
-        };
-        LanguageServiceShimObject.prototype.cleanupSemanticCache = function () {
-            var _this = this;
-            this.forwardJSONCall("cleanupSemanticCache()", function () {
-                _this.languageService.cleanupSemanticCache();
-                return null;
-            });
-        };
-        LanguageServiceShimObject.prototype.realizeDiagnostics = function (diagnostics) {
-            var newLine = ts.getNewLineOrDefaultFromHost(this.host);
-            return ts.realizeDiagnostics(diagnostics, newLine);
-        };
-        LanguageServiceShimObject.prototype.getSyntacticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSyntacticClassifications(fileName, ts.createTextSpan(start, length)); });
-        };
-        LanguageServiceShimObject.prototype.getSemanticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSemanticClassifications(fileName, ts.createTextSpan(start, length)); });
-        };
-        LanguageServiceShimObject.prototype.getEncodedSyntacticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getEncodedSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", 
-            // directly serialize the spans out to a string.  This is much faster to decode
-            // on the managed side versus a full JSON array.
-            function () { return convertClassifications(_this.languageService.getEncodedSyntacticClassifications(fileName, ts.createTextSpan(start, length))); });
-        };
-        LanguageServiceShimObject.prototype.getEncodedSemanticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getEncodedSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", 
-            // directly serialize the spans out to a string.  This is much faster to decode
-            // on the managed side versus a full JSON array.
-            function () { return convertClassifications(_this.languageService.getEncodedSemanticClassifications(fileName, ts.createTextSpan(start, length))); });
-        };
-        LanguageServiceShimObject.prototype.getSyntacticDiagnostics = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getSyntacticDiagnostics('" + fileName + "')", function () {
-                var diagnostics = _this.languageService.getSyntacticDiagnostics(fileName);
-                return _this.realizeDiagnostics(diagnostics);
-            });
-        };
-        LanguageServiceShimObject.prototype.getSemanticDiagnostics = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getSemanticDiagnostics('" + fileName + "')", function () {
-                var diagnostics = _this.languageService.getSemanticDiagnostics(fileName);
-                return _this.realizeDiagnostics(diagnostics);
-            });
-        };
-        LanguageServiceShimObject.prototype.getCompilerOptionsDiagnostics = function () {
-            var _this = this;
-            return this.forwardJSONCall("getCompilerOptionsDiagnostics()", function () {
-                var diagnostics = _this.languageService.getCompilerOptionsDiagnostics();
-                return _this.realizeDiagnostics(diagnostics);
-            });
-        };
-        /// QUICKINFO
-        /**
-         * Computes a string representation of the type at the requested position
-         * in the active file.
-         */
-        LanguageServiceShimObject.prototype.getQuickInfoAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getQuickInfoAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getQuickInfoAtPosition(fileName, position); });
-        };
-        /// NAMEORDOTTEDNAMESPAN
-        /**
-         * Computes span information of the name or dotted name at the requested position
-         * in the active file.
-         */
-        LanguageServiceShimObject.prototype.getNameOrDottedNameSpan = function (fileName, startPos, endPos) {
-            var _this = this;
-            return this.forwardJSONCall("getNameOrDottedNameSpan('" + fileName + "', " + startPos + ", " + endPos + ")", function () { return _this.languageService.getNameOrDottedNameSpan(fileName, startPos, endPos); });
-        };
-        /**
-         * STATEMENTSPAN
-         * Computes span information of statement at the requested position in the active file.
-         */
-        LanguageServiceShimObject.prototype.getBreakpointStatementAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getBreakpointStatementAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBreakpointStatementAtPosition(fileName, position); });
-        };
-        /// SIGNATUREHELP
-        LanguageServiceShimObject.prototype.getSignatureHelpItems = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getSignatureHelpItems('" + fileName + "', " + position + ")", function () { return _this.languageService.getSignatureHelpItems(fileName, position); });
-        };
-        /// GOTO DEFINITION
-        /**
-         * Computes the definition location and file for the symbol
-         * at the requested position.
-         */
-        LanguageServiceShimObject.prototype.getDefinitionAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDefinitionAtPosition(fileName, position); });
-        };
-        /// GOTO Type
-        /**
-         * Computes the definition location of the type of the symbol
-         * at the requested position.
-         */
-        LanguageServiceShimObject.prototype.getTypeDefinitionAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getTypeDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getTypeDefinitionAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getRenameInfo = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getRenameInfo('" + fileName + "', " + position + ")", function () { return _this.languageService.getRenameInfo(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.findRenameLocations = function (fileName, position, findInStrings, findInComments) {
-            var _this = this;
-            return this.forwardJSONCall("findRenameLocations('" + fileName + "', " + position + ", " + findInStrings + ", " + findInComments + ")", function () { return _this.languageService.findRenameLocations(fileName, position, findInStrings, findInComments); });
-        };
-        /// GET BRACE MATCHING
-        LanguageServiceShimObject.prototype.getBraceMatchingAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getBraceMatchingAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBraceMatchingAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.isValidBraceCompletionAtPostion = function (fileName, position, openingBrace) {
-            var _this = this;
-            return this.forwardJSONCall("isValidBraceCompletionAtPostion('" + fileName + "', " + position + ", " + openingBrace + ")", function () { return _this.languageService.isValidBraceCompletionAtPostion(fileName, position, openingBrace); });
-        };
-        /// GET SMART INDENT
-        LanguageServiceShimObject.prototype.getIndentationAtPosition = function (fileName, position, options /*Services.EditorOptions*/) {
-            var _this = this;
-            return this.forwardJSONCall("getIndentationAtPosition('" + fileName + "', " + position + ")", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getIndentationAtPosition(fileName, position, localOptions);
-            });
-        };
-        /// GET REFERENCES
-        LanguageServiceShimObject.prototype.getReferencesAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getReferencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getReferencesAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.findReferences = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("findReferences('" + fileName + "', " + position + ")", function () { return _this.languageService.findReferences(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getOccurrencesAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getOccurrencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getOccurrencesAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getDocumentHighlights = function (fileName, position, filesToSearch) {
-            var _this = this;
-            return this.forwardJSONCall("getDocumentHighlights('" + fileName + "', " + position + ")", function () {
-                var results = _this.languageService.getDocumentHighlights(fileName, position, JSON.parse(filesToSearch));
-                // workaround for VS document highlighting issue - keep only items from the initial file
-                var normalizedName = ts.normalizeSlashes(fileName).toLowerCase();
-                return ts.filter(results, function (r) { return ts.normalizeSlashes(r.fileName).toLowerCase() === normalizedName; });
-            });
-        };
-        /// COMPLETION LISTS
-        /**
-         * Get a string based representation of the completions
-         * to provide at the given source position and providing a member completion
-         * list if requested.
-         */
-        LanguageServiceShimObject.prototype.getCompletionsAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getCompletionsAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getCompletionsAtPosition(fileName, position); });
-        };
-        /** Get a string based representation of a completion list entry details */
-        LanguageServiceShimObject.prototype.getCompletionEntryDetails = function (fileName, position, entryName) {
-            var _this = this;
-            return this.forwardJSONCall("getCompletionEntryDetails('" + fileName + "', " + position + ", '" + entryName + "')", function () { return _this.languageService.getCompletionEntryDetails(fileName, position, entryName); });
-        };
-        LanguageServiceShimObject.prototype.getFormattingEditsForRange = function (fileName, start, end, options /*Services.FormatCodeOptions*/) {
-            var _this = this;
-            return this.forwardJSONCall("getFormattingEditsForRange('" + fileName + "', " + start + ", " + end + ")", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getFormattingEditsForRange(fileName, start, end, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getFormattingEditsForDocument = function (fileName, options /*Services.FormatCodeOptions*/) {
-            var _this = this;
-            return this.forwardJSONCall("getFormattingEditsForDocument('" + fileName + "')", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getFormattingEditsForDocument(fileName, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getFormattingEditsAfterKeystroke = function (fileName, position, key, options /*Services.FormatCodeOptions*/) {
-            var _this = this;
-            return this.forwardJSONCall("getFormattingEditsAfterKeystroke('" + fileName + "', " + position + ", '" + key + "')", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getFormattingEditsAfterKeystroke(fileName, position, key, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getDocCommentTemplateAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getDocCommentTemplateAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDocCommentTemplateAtPosition(fileName, position); });
-        };
-        /// NAVIGATE TO
-        /** Return a list of symbols that are interesting to navigate to */
-        LanguageServiceShimObject.prototype.getNavigateToItems = function (searchValue, maxResultCount) {
-            var _this = this;
-            return this.forwardJSONCall("getNavigateToItems('" + searchValue + "', " + maxResultCount + ")", function () { return _this.languageService.getNavigateToItems(searchValue, maxResultCount); });
-        };
-        LanguageServiceShimObject.prototype.getNavigationBarItems = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getNavigationBarItems('" + fileName + "')", function () { return _this.languageService.getNavigationBarItems(fileName); });
-        };
-        LanguageServiceShimObject.prototype.getOutliningSpans = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getOutliningSpans('" + fileName + "')", function () { return _this.languageService.getOutliningSpans(fileName); });
-        };
-        LanguageServiceShimObject.prototype.getTodoComments = function (fileName, descriptors) {
-            var _this = this;
-            return this.forwardJSONCall("getTodoComments('" + fileName + "')", function () { return _this.languageService.getTodoComments(fileName, JSON.parse(descriptors)); });
-        };
-        /// Emit
-        LanguageServiceShimObject.prototype.getEmitOutput = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getEmitOutput('" + fileName + "')", function () { return _this.languageService.getEmitOutput(fileName); });
-        };
-        return LanguageServiceShimObject;
-    }(ShimBase));
-    function convertClassifications(classifications) {
-        return { spans: classifications.spans.join(","), endOfLineState: classifications.endOfLineState };
-    }
-    var ClassifierShimObject = (function (_super) {
-        __extends(ClassifierShimObject, _super);
-        function ClassifierShimObject(factory, logger) {
-            _super.call(this, factory);
-            this.logger = logger;
-            this.logPerformance = false;
-            this.classifier = ts.createClassifier();
-        }
-        ClassifierShimObject.prototype.getEncodedLexicalClassifications = function (text, lexState, syntacticClassifierAbsent) {
-            var _this = this;
-            return forwardJSONCall(this.logger, "getEncodedLexicalClassifications", function () { return convertClassifications(_this.classifier.getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent)); }, this.logPerformance);
-        };
-        /// COLORIZATION
-        ClassifierShimObject.prototype.getClassificationsForLine = function (text, lexState, classifyKeywordsInGenerics) {
-            var classification = this.classifier.getClassificationsForLine(text, lexState, classifyKeywordsInGenerics);
-            var result = "";
-            for (var _i = 0, _a = classification.entries; _i < _a.length; _i++) {
-                var item = _a[_i];
-                result += item.length + "\n";
-                result += item.classification + "\n";
-            }
-            result += classification.finalLexState;
-            return result;
-        };
-        return ClassifierShimObject;
-    }(ShimBase));
-    var CoreServicesShimObject = (function (_super) {
-        __extends(CoreServicesShimObject, _super);
-        function CoreServicesShimObject(factory, logger, host) {
-            _super.call(this, factory);
-            this.logger = logger;
-            this.host = host;
-            this.logPerformance = false;
-        }
-        CoreServicesShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
-            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
-        };
-        CoreServicesShimObject.prototype.resolveModuleName = function (fileName, moduleName, compilerOptionsJson) {
-            var _this = this;
-            return this.forwardJSONCall("resolveModuleName('" + fileName + "')", function () {
-                var compilerOptions = JSON.parse(compilerOptionsJson);
-                var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
-                return {
-                    resolvedFileName: result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined,
-                    failedLookupLocations: result.failedLookupLocations
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.resolveTypeReferenceDirective = function (fileName, typeReferenceDirective, compilerOptionsJson) {
-            var _this = this;
-            return this.forwardJSONCall("resolveTypeReferenceDirective(" + fileName + ")", function () {
-                var compilerOptions = JSON.parse(compilerOptionsJson);
-                var result = ts.resolveTypeReferenceDirective(typeReferenceDirective, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
-                return {
-                    resolvedFileName: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.resolvedFileName : undefined,
-                    primary: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.primary : true,
-                    failedLookupLocations: result.failedLookupLocations
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.getPreProcessedFileInfo = function (fileName, sourceTextSnapshot) {
-            var _this = this;
-            return this.forwardJSONCall("getPreProcessedFileInfo('" + fileName + "')", function () {
-                // for now treat files as JavaScript 
-                var result = ts.preProcessFile(sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength()), /* readImportFiles */ true, /* detectJavaScriptImports */ true);
-                return {
-                    referencedFiles: _this.convertFileReferences(result.referencedFiles),
-                    importedFiles: _this.convertFileReferences(result.importedFiles),
-                    ambientExternalModules: result.ambientExternalModules,
-                    isLibFile: result.isLibFile,
-                    typeReferenceDirectives: _this.convertFileReferences(result.typeReferenceDirectives)
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.convertFileReferences = function (refs) {
-            if (!refs) {
-                return undefined;
-            }
-            var result = [];
-            for (var _i = 0, refs_2 = refs; _i < refs_2.length; _i++) {
-                var ref = refs_2[_i];
-                result.push({
-                    path: ts.normalizeSlashes(ref.fileName),
-                    position: ref.pos,
-                    length: ref.end - ref.pos
-                });
-            }
-            return result;
-        };
-        CoreServicesShimObject.prototype.getTSConfigFileInfo = function (fileName, sourceTextSnapshot) {
-            var _this = this;
-            return this.forwardJSONCall("getTSConfigFileInfo('" + fileName + "')", function () {
-                var text = sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength());
-                var result = ts.parseConfigFileTextToJson(fileName, text);
-                if (result.error) {
-                    return {
-                        options: {},
-                        typingOptions: {},
-                        files: [],
-                        raw: {},
-                        errors: [realizeDiagnostic(result.error, "\r\n")]
-                    };
-                }
-                var normalizedFileName = ts.normalizeSlashes(fileName);
-                var configFile = ts.parseJsonConfigFileContent(result.config, _this.host, ts.getDirectoryPath(normalizedFileName), /*existingOptions*/ {}, normalizedFileName);
-                return {
-                    options: configFile.options,
-                    typingOptions: configFile.typingOptions,
-                    files: configFile.fileNames,
-                    raw: configFile.raw,
-                    errors: realizeDiagnostics(configFile.errors, "\r\n")
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.getDefaultCompilationSettings = function () {
-            return this.forwardJSONCall("getDefaultCompilationSettings()", function () { return ts.getDefaultCompilerOptions(); });
-        };
-        CoreServicesShimObject.prototype.discoverTypings = function (discoverTypingsJson) {
-            var _this = this;
-            var getCanonicalFileName = ts.createGetCanonicalFileName(/*useCaseSensitivefileNames:*/ false);
-            return this.forwardJSONCall("discoverTypings()", function () {
-                var info = JSON.parse(discoverTypingsJson);
-                return ts.JsTyping.discoverTypings(_this.host, info.fileNames, ts.toPath(info.projectRootPath, info.projectRootPath, getCanonicalFileName), ts.toPath(info.safeListPath, info.safeListPath, getCanonicalFileName), info.packageNameToTypingLocation, info.typingOptions, info.compilerOptions);
-            });
-        };
-        return CoreServicesShimObject;
-    }(ShimBase));
-    var TypeScriptServicesFactory = (function () {
-        function TypeScriptServicesFactory() {
-            this._shims = [];
-        }
-        /*
-         * Returns script API version.
-         */
-        TypeScriptServicesFactory.prototype.getServicesVersion = function () {
-            return ts.servicesVersion;
-        };
-        TypeScriptServicesFactory.prototype.createLanguageServiceShim = function (host) {
-            try {
-                if (this.documentRegistry === undefined) {
-                    this.documentRegistry = ts.createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory());
-                }
-                var hostAdapter = new LanguageServiceShimHostAdapter(host);
-                var languageService = ts.createLanguageService(hostAdapter, this.documentRegistry);
-                return new LanguageServiceShimObject(this, host, languageService);
-            }
-            catch (err) {
-                logInternalError(host, err);
-                throw err;
-            }
-        };
-        TypeScriptServicesFactory.prototype.createClassifierShim = function (logger) {
-            try {
-                return new ClassifierShimObject(this, logger);
-            }
-            catch (err) {
-                logInternalError(logger, err);
-                throw err;
-            }
-        };
-        TypeScriptServicesFactory.prototype.createCoreServicesShim = function (host) {
-            try {
-                var adapter = new CoreServicesShimHostAdapter(host);
-                return new CoreServicesShimObject(this, host, adapter);
-            }
-            catch (err) {
-                logInternalError(host, err);
-                throw err;
-            }
-        };
-        TypeScriptServicesFactory.prototype.close = function () {
-            // Forget all the registered shims
-            this._shims = [];
-            this.documentRegistry = undefined;
-        };
-        TypeScriptServicesFactory.prototype.registerShim = function (shim) {
-            this._shims.push(shim);
-        };
-        TypeScriptServicesFactory.prototype.unregisterShim = function (shim) {
-            for (var i = 0, n = this._shims.length; i < n; i++) {
-                if (this._shims[i] === shim) {
-                    delete this._shims[i];
-                    return;
-                }
-            }
-            throw new Error("Invalid operation");
-        };
-        return TypeScriptServicesFactory;
-    }());
-    ts.TypeScriptServicesFactory = TypeScriptServicesFactory;
-    if (typeof module !== "undefined" && module.exports) {
-        module.exports = ts;
-    }
-})(ts || (ts = {}));
-/* tslint:enable:no-in-operator */
-/* tslint:enable:no-null */
-/// TODO: this is used by VS, clean this up on both sides of the interface
-/* @internal */
-var TypeScript;
-(function (TypeScript) {
-    var Services;
-    (function (Services) {
-        Services.TypeScriptServicesFactory = ts.TypeScriptServicesFactory;
-    })(Services = TypeScript.Services || (TypeScript.Services = {}));
-})(TypeScript || (TypeScript = {}));
-/* tslint:disable:no-unused-variable */
-// 'toolsVersion' gets consumed by the managed side, so it's not unused.
-// TODO: it should be moved into a namespace though.
-/* @internal */
-var toolsVersion = "1.9";
-/* tslint:enable:no-unused-variable */ 
+var __extends = (this && this.__extends) || function (d, b) {
+    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+};
+var ts;
+(function (ts) {
+    // token > SyntaxKind.Identifer => token is a keyword
+    // Also, If you add a new SyntaxKind be sure to keep the `Markers` section at the bottom in sync
+    (function (SyntaxKind) {
+        SyntaxKind[SyntaxKind["Unknown"] = 0] = "Unknown";
+        SyntaxKind[SyntaxKind["EndOfFileToken"] = 1] = "EndOfFileToken";
+        SyntaxKind[SyntaxKind["SingleLineCommentTrivia"] = 2] = "SingleLineCommentTrivia";
+        SyntaxKind[SyntaxKind["MultiLineCommentTrivia"] = 3] = "MultiLineCommentTrivia";
+        SyntaxKind[SyntaxKind["NewLineTrivia"] = 4] = "NewLineTrivia";
+        SyntaxKind[SyntaxKind["WhitespaceTrivia"] = 5] = "WhitespaceTrivia";
+        // We detect and preserve #! on the first line
+        SyntaxKind[SyntaxKind["ShebangTrivia"] = 6] = "ShebangTrivia";
+        // We detect and provide better error recovery when we encounter a git merge marker.  This
+        // allows us to edit files with git-conflict markers in them in a much more pleasant manner.
+        SyntaxKind[SyntaxKind["ConflictMarkerTrivia"] = 7] = "ConflictMarkerTrivia";
+        // Literals
+        SyntaxKind[SyntaxKind["NumericLiteral"] = 8] = "NumericLiteral";
+        SyntaxKind[SyntaxKind["StringLiteral"] = 9] = "StringLiteral";
+        SyntaxKind[SyntaxKind["RegularExpressionLiteral"] = 10] = "RegularExpressionLiteral";
+        SyntaxKind[SyntaxKind["NoSubstitutionTemplateLiteral"] = 11] = "NoSubstitutionTemplateLiteral";
+        // Pseudo-literals
+        SyntaxKind[SyntaxKind["TemplateHead"] = 12] = "TemplateHead";
+        SyntaxKind[SyntaxKind["TemplateMiddle"] = 13] = "TemplateMiddle";
+        SyntaxKind[SyntaxKind["TemplateTail"] = 14] = "TemplateTail";
+        // Punctuation
+        SyntaxKind[SyntaxKind["OpenBraceToken"] = 15] = "OpenBraceToken";
+        SyntaxKind[SyntaxKind["CloseBraceToken"] = 16] = "CloseBraceToken";
+        SyntaxKind[SyntaxKind["OpenParenToken"] = 17] = "OpenParenToken";
+        SyntaxKind[SyntaxKind["CloseParenToken"] = 18] = "CloseParenToken";
+        SyntaxKind[SyntaxKind["OpenBracketToken"] = 19] = "OpenBracketToken";
+        SyntaxKind[SyntaxKind["CloseBracketToken"] = 20] = "CloseBracketToken";
+        SyntaxKind[SyntaxKind["DotToken"] = 21] = "DotToken";
+        SyntaxKind[SyntaxKind["DotDotDotToken"] = 22] = "DotDotDotToken";
+        SyntaxKind[SyntaxKind["SemicolonToken"] = 23] = "SemicolonToken";
+        SyntaxKind[SyntaxKind["CommaToken"] = 24] = "CommaToken";
+        SyntaxKind[SyntaxKind["LessThanToken"] = 25] = "LessThanToken";
+        SyntaxKind[SyntaxKind["LessThanSlashToken"] = 26] = "LessThanSlashToken";
+        SyntaxKind[SyntaxKind["GreaterThanToken"] = 27] = "GreaterThanToken";
+        SyntaxKind[SyntaxKind["LessThanEqualsToken"] = 28] = "LessThanEqualsToken";
+        SyntaxKind[SyntaxKind["GreaterThanEqualsToken"] = 29] = "GreaterThanEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsEqualsToken"] = 30] = "EqualsEqualsToken";
+        SyntaxKind[SyntaxKind["ExclamationEqualsToken"] = 31] = "ExclamationEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsEqualsEqualsToken"] = 32] = "EqualsEqualsEqualsToken";
+        SyntaxKind[SyntaxKind["ExclamationEqualsEqualsToken"] = 33] = "ExclamationEqualsEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsGreaterThanToken"] = 34] = "EqualsGreaterThanToken";
+        SyntaxKind[SyntaxKind["PlusToken"] = 35] = "PlusToken";
+        SyntaxKind[SyntaxKind["MinusToken"] = 36] = "MinusToken";
+        SyntaxKind[SyntaxKind["AsteriskToken"] = 37] = "AsteriskToken";
+        SyntaxKind[SyntaxKind["AsteriskAsteriskToken"] = 38] = "AsteriskAsteriskToken";
+        SyntaxKind[SyntaxKind["SlashToken"] = 39] = "SlashToken";
+        SyntaxKind[SyntaxKind["PercentToken"] = 40] = "PercentToken";
+        SyntaxKind[SyntaxKind["PlusPlusToken"] = 41] = "PlusPlusToken";
+        SyntaxKind[SyntaxKind["MinusMinusToken"] = 42] = "MinusMinusToken";
+        SyntaxKind[SyntaxKind["LessThanLessThanToken"] = 43] = "LessThanLessThanToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanToken"] = 44] = "GreaterThanGreaterThanToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanToken"] = 45] = "GreaterThanGreaterThanGreaterThanToken";
+        SyntaxKind[SyntaxKind["AmpersandToken"] = 46] = "AmpersandToken";
+        SyntaxKind[SyntaxKind["BarToken"] = 47] = "BarToken";
+        SyntaxKind[SyntaxKind["CaretToken"] = 48] = "CaretToken";
+        SyntaxKind[SyntaxKind["ExclamationToken"] = 49] = "ExclamationToken";
+        SyntaxKind[SyntaxKind["TildeToken"] = 50] = "TildeToken";
+        SyntaxKind[SyntaxKind["AmpersandAmpersandToken"] = 51] = "AmpersandAmpersandToken";
+        SyntaxKind[SyntaxKind["BarBarToken"] = 52] = "BarBarToken";
+        SyntaxKind[SyntaxKind["QuestionToken"] = 53] = "QuestionToken";
+        SyntaxKind[SyntaxKind["ColonToken"] = 54] = "ColonToken";
+        SyntaxKind[SyntaxKind["AtToken"] = 55] = "AtToken";
+        // Assignments
+        SyntaxKind[SyntaxKind["EqualsToken"] = 56] = "EqualsToken";
+        SyntaxKind[SyntaxKind["PlusEqualsToken"] = 57] = "PlusEqualsToken";
+        SyntaxKind[SyntaxKind["MinusEqualsToken"] = 58] = "MinusEqualsToken";
+        SyntaxKind[SyntaxKind["AsteriskEqualsToken"] = 59] = "AsteriskEqualsToken";
+        SyntaxKind[SyntaxKind["AsteriskAsteriskEqualsToken"] = 60] = "AsteriskAsteriskEqualsToken";
+        SyntaxKind[SyntaxKind["SlashEqualsToken"] = 61] = "SlashEqualsToken";
+        SyntaxKind[SyntaxKind["PercentEqualsToken"] = 62] = "PercentEqualsToken";
+        SyntaxKind[SyntaxKind["LessThanLessThanEqualsToken"] = 63] = "LessThanLessThanEqualsToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanEqualsToken"] = 64] = "GreaterThanGreaterThanEqualsToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanEqualsToken"] = 65] = "GreaterThanGreaterThanGreaterThanEqualsToken";
+        SyntaxKind[SyntaxKind["AmpersandEqualsToken"] = 66] = "AmpersandEqualsToken";
+        SyntaxKind[SyntaxKind["BarEqualsToken"] = 67] = "BarEqualsToken";
+        SyntaxKind[SyntaxKind["CaretEqualsToken"] = 68] = "CaretEqualsToken";
+        // Identifiers
+        SyntaxKind[SyntaxKind["Identifier"] = 69] = "Identifier";
+        // Reserved words
+        SyntaxKind[SyntaxKind["BreakKeyword"] = 70] = "BreakKeyword";
+        SyntaxKind[SyntaxKind["CaseKeyword"] = 71] = "CaseKeyword";
+        SyntaxKind[SyntaxKind["CatchKeyword"] = 72] = "CatchKeyword";
+        SyntaxKind[SyntaxKind["ClassKeyword"] = 73] = "ClassKeyword";
+        SyntaxKind[SyntaxKind["ConstKeyword"] = 74] = "ConstKeyword";
+        SyntaxKind[SyntaxKind["ContinueKeyword"] = 75] = "ContinueKeyword";
+        SyntaxKind[SyntaxKind["DebuggerKeyword"] = 76] = "DebuggerKeyword";
+        SyntaxKind[SyntaxKind["DefaultKeyword"] = 77] = "DefaultKeyword";
+        SyntaxKind[SyntaxKind["DeleteKeyword"] = 78] = "DeleteKeyword";
+        SyntaxKind[SyntaxKind["DoKeyword"] = 79] = "DoKeyword";
+        SyntaxKind[SyntaxKind["ElseKeyword"] = 80] = "ElseKeyword";
+        SyntaxKind[SyntaxKind["EnumKeyword"] = 81] = "EnumKeyword";
+        SyntaxKind[SyntaxKind["ExportKeyword"] = 82] = "ExportKeyword";
+        SyntaxKind[SyntaxKind["ExtendsKeyword"] = 83] = "ExtendsKeyword";
+        SyntaxKind[SyntaxKind["FalseKeyword"] = 84] = "FalseKeyword";
+        SyntaxKind[SyntaxKind["FinallyKeyword"] = 85] = "FinallyKeyword";
+        SyntaxKind[SyntaxKind["ForKeyword"] = 86] = "ForKeyword";
+        SyntaxKind[SyntaxKind["FunctionKeyword"] = 87] = "FunctionKeyword";
+        SyntaxKind[SyntaxKind["IfKeyword"] = 88] = "IfKeyword";
+        SyntaxKind[SyntaxKind["ImportKeyword"] = 89] = "ImportKeyword";
+        SyntaxKind[SyntaxKind["InKeyword"] = 90] = "InKeyword";
+        SyntaxKind[SyntaxKind["InstanceOfKeyword"] = 91] = "InstanceOfKeyword";
+        SyntaxKind[SyntaxKind["NewKeyword"] = 92] = "NewKeyword";
+        SyntaxKind[SyntaxKind["NullKeyword"] = 93] = "NullKeyword";
+        SyntaxKind[SyntaxKind["ReturnKeyword"] = 94] = "ReturnKeyword";
+        SyntaxKind[SyntaxKind["SuperKeyword"] = 95] = "SuperKeyword";
+        SyntaxKind[SyntaxKind["SwitchKeyword"] = 96] = "SwitchKeyword";
+        SyntaxKind[SyntaxKind["ThisKeyword"] = 97] = "ThisKeyword";
+        SyntaxKind[SyntaxKind["ThrowKeyword"] = 98] = "ThrowKeyword";
+        SyntaxKind[SyntaxKind["TrueKeyword"] = 99] = "TrueKeyword";
+        SyntaxKind[SyntaxKind["TryKeyword"] = 100] = "TryKeyword";
+        SyntaxKind[SyntaxKind["TypeOfKeyword"] = 101] = "TypeOfKeyword";
+        SyntaxKind[SyntaxKind["VarKeyword"] = 102] = "VarKeyword";
+        SyntaxKind[SyntaxKind["VoidKeyword"] = 103] = "VoidKeyword";
+        SyntaxKind[SyntaxKind["WhileKeyword"] = 104] = "WhileKeyword";
+        SyntaxKind[SyntaxKind["WithKeyword"] = 105] = "WithKeyword";
+        // Strict mode reserved words
+        SyntaxKind[SyntaxKind["ImplementsKeyword"] = 106] = "ImplementsKeyword";
+        SyntaxKind[SyntaxKind["InterfaceKeyword"] = 107] = "InterfaceKeyword";
+        SyntaxKind[SyntaxKind["LetKeyword"] = 108] = "LetKeyword";
+        SyntaxKind[SyntaxKind["PackageKeyword"] = 109] = "PackageKeyword";
+        SyntaxKind[SyntaxKind["PrivateKeyword"] = 110] = "PrivateKeyword";
+        SyntaxKind[SyntaxKind["ProtectedKeyword"] = 111] = "ProtectedKeyword";
+        SyntaxKind[SyntaxKind["PublicKeyword"] = 112] = "PublicKeyword";
+        SyntaxKind[SyntaxKind["StaticKeyword"] = 113] = "StaticKeyword";
+        SyntaxKind[SyntaxKind["YieldKeyword"] = 114] = "YieldKeyword";
+        // Contextual keywords
+        SyntaxKind[SyntaxKind["AbstractKeyword"] = 115] = "AbstractKeyword";
+        SyntaxKind[SyntaxKind["AsKeyword"] = 116] = "AsKeyword";
+        SyntaxKind[SyntaxKind["AnyKeyword"] = 117] = "AnyKeyword";
+        SyntaxKind[SyntaxKind["AsyncKeyword"] = 118] = "AsyncKeyword";
+        SyntaxKind[SyntaxKind["AwaitKeyword"] = 119] = "AwaitKeyword";
+        SyntaxKind[SyntaxKind["BooleanKeyword"] = 120] = "BooleanKeyword";
+        SyntaxKind[SyntaxKind["ConstructorKeyword"] = 121] = "ConstructorKeyword";
+        SyntaxKind[SyntaxKind["DeclareKeyword"] = 122] = "DeclareKeyword";
+        SyntaxKind[SyntaxKind["GetKeyword"] = 123] = "GetKeyword";
+        SyntaxKind[SyntaxKind["IsKeyword"] = 124] = "IsKeyword";
+        SyntaxKind[SyntaxKind["ModuleKeyword"] = 125] = "ModuleKeyword";
+        SyntaxKind[SyntaxKind["NamespaceKeyword"] = 126] = "NamespaceKeyword";
+        SyntaxKind[SyntaxKind["NeverKeyword"] = 127] = "NeverKeyword";
+        SyntaxKind[SyntaxKind["ReadonlyKeyword"] = 128] = "ReadonlyKeyword";
+        SyntaxKind[SyntaxKind["RequireKeyword"] = 129] = "RequireKeyword";
+        SyntaxKind[SyntaxKind["NumberKeyword"] = 130] = "NumberKeyword";
+        SyntaxKind[SyntaxKind["SetKeyword"] = 131] = "SetKeyword";
+        SyntaxKind[SyntaxKind["StringKeyword"] = 132] = "StringKeyword";
+        SyntaxKind[SyntaxKind["SymbolKeyword"] = 133] = "SymbolKeyword";
+        SyntaxKind[SyntaxKind["TypeKeyword"] = 134] = "TypeKeyword";
+        SyntaxKind[SyntaxKind["UndefinedKeyword"] = 135] = "UndefinedKeyword";
+        SyntaxKind[SyntaxKind["FromKeyword"] = 136] = "FromKeyword";
+        SyntaxKind[SyntaxKind["GlobalKeyword"] = 137] = "GlobalKeyword";
+        SyntaxKind[SyntaxKind["OfKeyword"] = 138] = "OfKeyword";
+        // Parse tree nodes
+        // Names
+        SyntaxKind[SyntaxKind["QualifiedName"] = 139] = "QualifiedName";
+        SyntaxKind[SyntaxKind["ComputedPropertyName"] = 140] = "ComputedPropertyName";
+        // Signature elements
+        SyntaxKind[SyntaxKind["TypeParameter"] = 141] = "TypeParameter";
+        SyntaxKind[SyntaxKind["Parameter"] = 142] = "Parameter";
+        SyntaxKind[SyntaxKind["Decorator"] = 143] = "Decorator";
+        // TypeMember
+        SyntaxKind[SyntaxKind["PropertySignature"] = 144] = "PropertySignature";
+        SyntaxKind[SyntaxKind["PropertyDeclaration"] = 145] = "PropertyDeclaration";
+        SyntaxKind[SyntaxKind["MethodSignature"] = 146] = "MethodSignature";
+        SyntaxKind[SyntaxKind["MethodDeclaration"] = 147] = "MethodDeclaration";
+        SyntaxKind[SyntaxKind["Constructor"] = 148] = "Constructor";
+        SyntaxKind[SyntaxKind["GetAccessor"] = 149] = "GetAccessor";
+        SyntaxKind[SyntaxKind["SetAccessor"] = 150] = "SetAccessor";
+        SyntaxKind[SyntaxKind["CallSignature"] = 151] = "CallSignature";
+        SyntaxKind[SyntaxKind["ConstructSignature"] = 152] = "ConstructSignature";
+        SyntaxKind[SyntaxKind["IndexSignature"] = 153] = "IndexSignature";
+        // Type
+        SyntaxKind[SyntaxKind["TypePredicate"] = 154] = "TypePredicate";
+        SyntaxKind[SyntaxKind["TypeReference"] = 155] = "TypeReference";
+        SyntaxKind[SyntaxKind["FunctionType"] = 156] = "FunctionType";
+        SyntaxKind[SyntaxKind["ConstructorType"] = 157] = "ConstructorType";
+        SyntaxKind[SyntaxKind["TypeQuery"] = 158] = "TypeQuery";
+        SyntaxKind[SyntaxKind["TypeLiteral"] = 159] = "TypeLiteral";
+        SyntaxKind[SyntaxKind["ArrayType"] = 160] = "ArrayType";
+        SyntaxKind[SyntaxKind["TupleType"] = 161] = "TupleType";
+        SyntaxKind[SyntaxKind["UnionType"] = 162] = "UnionType";
+        SyntaxKind[SyntaxKind["IntersectionType"] = 163] = "IntersectionType";
+        SyntaxKind[SyntaxKind["ParenthesizedType"] = 164] = "ParenthesizedType";
+        SyntaxKind[SyntaxKind["ThisType"] = 165] = "ThisType";
+        SyntaxKind[SyntaxKind["StringLiteralType"] = 166] = "StringLiteralType";
+        // Binding patterns
+        SyntaxKind[SyntaxKind["ObjectBindingPattern"] = 167] = "ObjectBindingPattern";
+        SyntaxKind[SyntaxKind["ArrayBindingPattern"] = 168] = "ArrayBindingPattern";
+        SyntaxKind[SyntaxKind["BindingElement"] = 169] = "BindingElement";
+        // Expression
+        SyntaxKind[SyntaxKind["ArrayLiteralExpression"] = 170] = "ArrayLiteralExpression";
+        SyntaxKind[SyntaxKind["ObjectLiteralExpression"] = 171] = "ObjectLiteralExpression";
+        SyntaxKind[SyntaxKind["PropertyAccessExpression"] = 172] = "PropertyAccessExpression";
+        SyntaxKind[SyntaxKind["ElementAccessExpression"] = 173] = "ElementAccessExpression";
+        SyntaxKind[SyntaxKind["CallExpression"] = 174] = "CallExpression";
+        SyntaxKind[SyntaxKind["NewExpression"] = 175] = "NewExpression";
+        SyntaxKind[SyntaxKind["TaggedTemplateExpression"] = 176] = "TaggedTemplateExpression";
+        SyntaxKind[SyntaxKind["TypeAssertionExpression"] = 177] = "TypeAssertionExpression";
+        SyntaxKind[SyntaxKind["ParenthesizedExpression"] = 178] = "ParenthesizedExpression";
+        SyntaxKind[SyntaxKind["FunctionExpression"] = 179] = "FunctionExpression";
+        SyntaxKind[SyntaxKind["ArrowFunction"] = 180] = "ArrowFunction";
+        SyntaxKind[SyntaxKind["DeleteExpression"] = 181] = "DeleteExpression";
+        SyntaxKind[SyntaxKind["TypeOfExpression"] = 182] = "TypeOfExpression";
+        SyntaxKind[SyntaxKind["VoidExpression"] = 183] = "VoidExpression";
+        SyntaxKind[SyntaxKind["AwaitExpression"] = 184] = "AwaitExpression";
+        SyntaxKind[SyntaxKind["PrefixUnaryExpression"] = 185] = "PrefixUnaryExpression";
+        SyntaxKind[SyntaxKind["PostfixUnaryExpression"] = 186] = "PostfixUnaryExpression";
+        SyntaxKind[SyntaxKind["BinaryExpression"] = 187] = "BinaryExpression";
+        SyntaxKind[SyntaxKind["ConditionalExpression"] = 188] = "ConditionalExpression";
+        SyntaxKind[SyntaxKind["TemplateExpression"] = 189] = "TemplateExpression";
+        SyntaxKind[SyntaxKind["YieldExpression"] = 190] = "YieldExpression";
+        SyntaxKind[SyntaxKind["SpreadElementExpression"] = 191] = "SpreadElementExpression";
+        SyntaxKind[SyntaxKind["ClassExpression"] = 192] = "ClassExpression";
+        SyntaxKind[SyntaxKind["OmittedExpression"] = 193] = "OmittedExpression";
+        SyntaxKind[SyntaxKind["ExpressionWithTypeArguments"] = 194] = "ExpressionWithTypeArguments";
+        SyntaxKind[SyntaxKind["AsExpression"] = 195] = "AsExpression";
+        SyntaxKind[SyntaxKind["NonNullExpression"] = 196] = "NonNullExpression";
+        // Misc
+        SyntaxKind[SyntaxKind["TemplateSpan"] = 197] = "TemplateSpan";
+        SyntaxKind[SyntaxKind["SemicolonClassElement"] = 198] = "SemicolonClassElement";
+        // Element
+        SyntaxKind[SyntaxKind["Block"] = 199] = "Block";
+        SyntaxKind[SyntaxKind["VariableStatement"] = 200] = "VariableStatement";
+        SyntaxKind[SyntaxKind["EmptyStatement"] = 201] = "EmptyStatement";
+        SyntaxKind[SyntaxKind["ExpressionStatement"] = 202] = "ExpressionStatement";
+        SyntaxKind[SyntaxKind["IfStatement"] = 203] = "IfStatement";
+        SyntaxKind[SyntaxKind["DoStatement"] = 204] = "DoStatement";
+        SyntaxKind[SyntaxKind["WhileStatement"] = 205] = "WhileStatement";
+        SyntaxKind[SyntaxKind["ForStatement"] = 206] = "ForStatement";
+        SyntaxKind[SyntaxKind["ForInStatement"] = 207] = "ForInStatement";
+        SyntaxKind[SyntaxKind["ForOfStatement"] = 208] = "ForOfStatement";
+        SyntaxKind[SyntaxKind["ContinueStatement"] = 209] = "ContinueStatement";
+        SyntaxKind[SyntaxKind["BreakStatement"] = 210] = "BreakStatement";
+        SyntaxKind[SyntaxKind["ReturnStatement"] = 211] = "ReturnStatement";
+        SyntaxKind[SyntaxKind["WithStatement"] = 212] = "WithStatement";
+        SyntaxKind[SyntaxKind["SwitchStatement"] = 213] = "SwitchStatement";
+        SyntaxKind[SyntaxKind["LabeledStatement"] = 214] = "LabeledStatement";
+        SyntaxKind[SyntaxKind["ThrowStatement"] = 215] = "ThrowStatement";
+        SyntaxKind[SyntaxKind["TryStatement"] = 216] = "TryStatement";
+        SyntaxKind[SyntaxKind["DebuggerStatement"] = 217] = "DebuggerStatement";
+        SyntaxKind[SyntaxKind["VariableDeclaration"] = 218] = "VariableDeclaration";
+        SyntaxKind[SyntaxKind["VariableDeclarationList"] = 219] = "VariableDeclarationList";
+        SyntaxKind[SyntaxKind["FunctionDeclaration"] = 220] = "FunctionDeclaration";
+        SyntaxKind[SyntaxKind["ClassDeclaration"] = 221] = "ClassDeclaration";
+        SyntaxKind[SyntaxKind["InterfaceDeclaration"] = 222] = "InterfaceDeclaration";
+        SyntaxKind[SyntaxKind["TypeAliasDeclaration"] = 223] = "TypeAliasDeclaration";
+        SyntaxKind[SyntaxKind["EnumDeclaration"] = 224] = "EnumDeclaration";
+        SyntaxKind[SyntaxKind["ModuleDeclaration"] = 225] = "ModuleDeclaration";
+        SyntaxKind[SyntaxKind["ModuleBlock"] = 226] = "ModuleBlock";
+        SyntaxKind[SyntaxKind["CaseBlock"] = 227] = "CaseBlock";
+        SyntaxKind[SyntaxKind["NamespaceExportDeclaration"] = 228] = "NamespaceExportDeclaration";
+        SyntaxKind[SyntaxKind["ImportEqualsDeclaration"] = 229] = "ImportEqualsDeclaration";
+        SyntaxKind[SyntaxKind["ImportDeclaration"] = 230] = "ImportDeclaration";
+        SyntaxKind[SyntaxKind["ImportClause"] = 231] = "ImportClause";
+        SyntaxKind[SyntaxKind["NamespaceImport"] = 232] = "NamespaceImport";
+        SyntaxKind[SyntaxKind["NamedImports"] = 233] = "NamedImports";
+        SyntaxKind[SyntaxKind["ImportSpecifier"] = 234] = "ImportSpecifier";
+        SyntaxKind[SyntaxKind["ExportAssignment"] = 235] = "ExportAssignment";
+        SyntaxKind[SyntaxKind["ExportDeclaration"] = 236] = "ExportDeclaration";
+        SyntaxKind[SyntaxKind["NamedExports"] = 237] = "NamedExports";
+        SyntaxKind[SyntaxKind["ExportSpecifier"] = 238] = "ExportSpecifier";
+        SyntaxKind[SyntaxKind["MissingDeclaration"] = 239] = "MissingDeclaration";
+        // Module references
+        SyntaxKind[SyntaxKind["ExternalModuleReference"] = 240] = "ExternalModuleReference";
+        // JSX
+        SyntaxKind[SyntaxKind["JsxElement"] = 241] = "JsxElement";
+        SyntaxKind[SyntaxKind["JsxSelfClosingElement"] = 242] = "JsxSelfClosingElement";
+        SyntaxKind[SyntaxKind["JsxOpeningElement"] = 243] = "JsxOpeningElement";
+        SyntaxKind[SyntaxKind["JsxText"] = 244] = "JsxText";
+        SyntaxKind[SyntaxKind["JsxClosingElement"] = 245] = "JsxClosingElement";
+        SyntaxKind[SyntaxKind["JsxAttribute"] = 246] = "JsxAttribute";
+        SyntaxKind[SyntaxKind["JsxSpreadAttribute"] = 247] = "JsxSpreadAttribute";
+        SyntaxKind[SyntaxKind["JsxExpression"] = 248] = "JsxExpression";
+        // Clauses
+        SyntaxKind[SyntaxKind["CaseClause"] = 249] = "CaseClause";
+        SyntaxKind[SyntaxKind["DefaultClause"] = 250] = "DefaultClause";
+        SyntaxKind[SyntaxKind["HeritageClause"] = 251] = "HeritageClause";
+        SyntaxKind[SyntaxKind["CatchClause"] = 252] = "CatchClause";
+        // Property assignments
+        SyntaxKind[SyntaxKind["PropertyAssignment"] = 253] = "PropertyAssignment";
+        SyntaxKind[SyntaxKind["ShorthandPropertyAssignment"] = 254] = "ShorthandPropertyAssignment";
+        // Enum
+        SyntaxKind[SyntaxKind["EnumMember"] = 255] = "EnumMember";
+        // Top-level nodes
+        SyntaxKind[SyntaxKind["SourceFile"] = 256] = "SourceFile";
+        // JSDoc nodes
+        SyntaxKind[SyntaxKind["JSDocTypeExpression"] = 257] = "JSDocTypeExpression";
+        // The * type
+        SyntaxKind[SyntaxKind["JSDocAllType"] = 258] = "JSDocAllType";
+        // The ? type
+        SyntaxKind[SyntaxKind["JSDocUnknownType"] = 259] = "JSDocUnknownType";
+        SyntaxKind[SyntaxKind["JSDocArrayType"] = 260] = "JSDocArrayType";
+        SyntaxKind[SyntaxKind["JSDocUnionType"] = 261] = "JSDocUnionType";
+        SyntaxKind[SyntaxKind["JSDocTupleType"] = 262] = "JSDocTupleType";
+        SyntaxKind[SyntaxKind["JSDocNullableType"] = 263] = "JSDocNullableType";
+        SyntaxKind[SyntaxKind["JSDocNonNullableType"] = 264] = "JSDocNonNullableType";
+        SyntaxKind[SyntaxKind["JSDocRecordType"] = 265] = "JSDocRecordType";
+        SyntaxKind[SyntaxKind["JSDocRecordMember"] = 266] = "JSDocRecordMember";
+        SyntaxKind[SyntaxKind["JSDocTypeReference"] = 267] = "JSDocTypeReference";
+        SyntaxKind[SyntaxKind["JSDocOptionalType"] = 268] = "JSDocOptionalType";
+        SyntaxKind[SyntaxKind["JSDocFunctionType"] = 269] = "JSDocFunctionType";
+        SyntaxKind[SyntaxKind["JSDocVariadicType"] = 270] = "JSDocVariadicType";
+        SyntaxKind[SyntaxKind["JSDocConstructorType"] = 271] = "JSDocConstructorType";
+        SyntaxKind[SyntaxKind["JSDocThisType"] = 272] = "JSDocThisType";
+        SyntaxKind[SyntaxKind["JSDocComment"] = 273] = "JSDocComment";
+        SyntaxKind[SyntaxKind["JSDocTag"] = 274] = "JSDocTag";
+        SyntaxKind[SyntaxKind["JSDocParameterTag"] = 275] = "JSDocParameterTag";
+        SyntaxKind[SyntaxKind["JSDocReturnTag"] = 276] = "JSDocReturnTag";
+        SyntaxKind[SyntaxKind["JSDocTypeTag"] = 277] = "JSDocTypeTag";
+        SyntaxKind[SyntaxKind["JSDocTemplateTag"] = 278] = "JSDocTemplateTag";
+        SyntaxKind[SyntaxKind["JSDocTypedefTag"] = 279] = "JSDocTypedefTag";
+        SyntaxKind[SyntaxKind["JSDocPropertyTag"] = 280] = "JSDocPropertyTag";
+        SyntaxKind[SyntaxKind["JSDocTypeLiteral"] = 281] = "JSDocTypeLiteral";
+        // Synthesized list
+        SyntaxKind[SyntaxKind["SyntaxList"] = 282] = "SyntaxList";
+        // Enum value count
+        SyntaxKind[SyntaxKind["Count"] = 283] = "Count";
+        // Markers
+        SyntaxKind[SyntaxKind["FirstAssignment"] = 56] = "FirstAssignment";
+        SyntaxKind[SyntaxKind["LastAssignment"] = 68] = "LastAssignment";
+        SyntaxKind[SyntaxKind["FirstReservedWord"] = 70] = "FirstReservedWord";
+        SyntaxKind[SyntaxKind["LastReservedWord"] = 105] = "LastReservedWord";
+        SyntaxKind[SyntaxKind["FirstKeyword"] = 70] = "FirstKeyword";
+        SyntaxKind[SyntaxKind["LastKeyword"] = 138] = "LastKeyword";
+        SyntaxKind[SyntaxKind["FirstFutureReservedWord"] = 106] = "FirstFutureReservedWord";
+        SyntaxKind[SyntaxKind["LastFutureReservedWord"] = 114] = "LastFutureReservedWord";
+        SyntaxKind[SyntaxKind["FirstTypeNode"] = 154] = "FirstTypeNode";
+        SyntaxKind[SyntaxKind["LastTypeNode"] = 166] = "LastTypeNode";
+        SyntaxKind[SyntaxKind["FirstPunctuation"] = 15] = "FirstPunctuation";
+        SyntaxKind[SyntaxKind["LastPunctuation"] = 68] = "LastPunctuation";
+        SyntaxKind[SyntaxKind["FirstToken"] = 0] = "FirstToken";
+        SyntaxKind[SyntaxKind["LastToken"] = 138] = "LastToken";
+        SyntaxKind[SyntaxKind["FirstTriviaToken"] = 2] = "FirstTriviaToken";
+        SyntaxKind[SyntaxKind["LastTriviaToken"] = 7] = "LastTriviaToken";
+        SyntaxKind[SyntaxKind["FirstLiteralToken"] = 8] = "FirstLiteralToken";
+        SyntaxKind[SyntaxKind["LastLiteralToken"] = 11] = "LastLiteralToken";
+        SyntaxKind[SyntaxKind["FirstTemplateToken"] = 11] = "FirstTemplateToken";
+        SyntaxKind[SyntaxKind["LastTemplateToken"] = 14] = "LastTemplateToken";
+        SyntaxKind[SyntaxKind["FirstBinaryOperator"] = 25] = "FirstBinaryOperator";
+        SyntaxKind[SyntaxKind["LastBinaryOperator"] = 68] = "LastBinaryOperator";
+        SyntaxKind[SyntaxKind["FirstNode"] = 139] = "FirstNode";
+        SyntaxKind[SyntaxKind["FirstJSDocNode"] = 257] = "FirstJSDocNode";
+        SyntaxKind[SyntaxKind["LastJSDocNode"] = 281] = "LastJSDocNode";
+        SyntaxKind[SyntaxKind["FirstJSDocTagNode"] = 273] = "FirstJSDocTagNode";
+        SyntaxKind[SyntaxKind["LastJSDocTagNode"] = 281] = "LastJSDocTagNode";
+    })(ts.SyntaxKind || (ts.SyntaxKind = {}));
+    var SyntaxKind = ts.SyntaxKind;
+    (function (NodeFlags) {
+        NodeFlags[NodeFlags["None"] = 0] = "None";
+        NodeFlags[NodeFlags["Export"] = 1] = "Export";
+        NodeFlags[NodeFlags["Ambient"] = 2] = "Ambient";
+        NodeFlags[NodeFlags["Public"] = 4] = "Public";
+        NodeFlags[NodeFlags["Private"] = 8] = "Private";
+        NodeFlags[NodeFlags["Protected"] = 16] = "Protected";
+        NodeFlags[NodeFlags["Static"] = 32] = "Static";
+        NodeFlags[NodeFlags["Readonly"] = 64] = "Readonly";
+        NodeFlags[NodeFlags["Abstract"] = 128] = "Abstract";
+        NodeFlags[NodeFlags["Async"] = 256] = "Async";
+        NodeFlags[NodeFlags["Default"] = 512] = "Default";
+        NodeFlags[NodeFlags["Let"] = 1024] = "Let";
+        NodeFlags[NodeFlags["Const"] = 2048] = "Const";
+        NodeFlags[NodeFlags["Namespace"] = 4096] = "Namespace";
+        NodeFlags[NodeFlags["ExportContext"] = 8192] = "ExportContext";
+        NodeFlags[NodeFlags["ContainsThis"] = 16384] = "ContainsThis";
+        NodeFlags[NodeFlags["HasImplicitReturn"] = 32768] = "HasImplicitReturn";
+        NodeFlags[NodeFlags["HasExplicitReturn"] = 65536] = "HasExplicitReturn";
+        NodeFlags[NodeFlags["GlobalAugmentation"] = 131072] = "GlobalAugmentation";
+        NodeFlags[NodeFlags["HasClassExtends"] = 262144] = "HasClassExtends";
+        NodeFlags[NodeFlags["HasDecorators"] = 524288] = "HasDecorators";
+        NodeFlags[NodeFlags["HasParamDecorators"] = 1048576] = "HasParamDecorators";
+        NodeFlags[NodeFlags["HasAsyncFunctions"] = 2097152] = "HasAsyncFunctions";
+        NodeFlags[NodeFlags["DisallowInContext"] = 4194304] = "DisallowInContext";
+        NodeFlags[NodeFlags["YieldContext"] = 8388608] = "YieldContext";
+        NodeFlags[NodeFlags["DecoratorContext"] = 16777216] = "DecoratorContext";
+        NodeFlags[NodeFlags["AwaitContext"] = 33554432] = "AwaitContext";
+        NodeFlags[NodeFlags["ThisNodeHasError"] = 67108864] = "ThisNodeHasError";
+        NodeFlags[NodeFlags["JavaScriptFile"] = 134217728] = "JavaScriptFile";
+        NodeFlags[NodeFlags["ThisNodeOrAnySubNodesHasError"] = 268435456] = "ThisNodeOrAnySubNodesHasError";
+        NodeFlags[NodeFlags["HasAggregatedChildData"] = 536870912] = "HasAggregatedChildData";
+        NodeFlags[NodeFlags["HasJsxSpreadAttribute"] = 1073741824] = "HasJsxSpreadAttribute";
+        NodeFlags[NodeFlags["Modifier"] = 1023] = "Modifier";
+        NodeFlags[NodeFlags["AccessibilityModifier"] = 28] = "AccessibilityModifier";
+        // Accessibility modifiers and 'readonly' can be attached to a parameter in a constructor to make it a property.
+        NodeFlags[NodeFlags["ParameterPropertyModifier"] = 92] = "ParameterPropertyModifier";
+        NodeFlags[NodeFlags["BlockScoped"] = 3072] = "BlockScoped";
+        NodeFlags[NodeFlags["ReachabilityCheckFlags"] = 98304] = "ReachabilityCheckFlags";
+        NodeFlags[NodeFlags["EmitHelperFlags"] = 3932160] = "EmitHelperFlags";
+        NodeFlags[NodeFlags["ReachabilityAndEmitFlags"] = 4030464] = "ReachabilityAndEmitFlags";
+        // Parsing context flags
+        NodeFlags[NodeFlags["ContextFlags"] = 197132288] = "ContextFlags";
+        // Exclude these flags when parsing a Type
+        NodeFlags[NodeFlags["TypeExcludesFlags"] = 41943040] = "TypeExcludesFlags";
+    })(ts.NodeFlags || (ts.NodeFlags = {}));
+    var NodeFlags = ts.NodeFlags;
+    (function (JsxFlags) {
+        JsxFlags[JsxFlags["None"] = 0] = "None";
+        /** An element from a named property of the JSX.IntrinsicElements interface */
+        JsxFlags[JsxFlags["IntrinsicNamedElement"] = 1] = "IntrinsicNamedElement";
+        /** An element inferred from the string index signature of the JSX.IntrinsicElements interface */
+        JsxFlags[JsxFlags["IntrinsicIndexedElement"] = 2] = "IntrinsicIndexedElement";
+        JsxFlags[JsxFlags["IntrinsicElement"] = 3] = "IntrinsicElement";
+    })(ts.JsxFlags || (ts.JsxFlags = {}));
+    var JsxFlags = ts.JsxFlags;
+    /* @internal */
+    (function (RelationComparisonResult) {
+        RelationComparisonResult[RelationComparisonResult["Succeeded"] = 1] = "Succeeded";
+        RelationComparisonResult[RelationComparisonResult["Failed"] = 2] = "Failed";
+        RelationComparisonResult[RelationComparisonResult["FailedAndReported"] = 3] = "FailedAndReported";
+    })(ts.RelationComparisonResult || (ts.RelationComparisonResult = {}));
+    var RelationComparisonResult = ts.RelationComparisonResult;
+    (function (FlowFlags) {
+        FlowFlags[FlowFlags["Unreachable"] = 1] = "Unreachable";
+        FlowFlags[FlowFlags["Start"] = 2] = "Start";
+        FlowFlags[FlowFlags["BranchLabel"] = 4] = "BranchLabel";
+        FlowFlags[FlowFlags["LoopLabel"] = 8] = "LoopLabel";
+        FlowFlags[FlowFlags["Assignment"] = 16] = "Assignment";
+        FlowFlags[FlowFlags["TrueCondition"] = 32] = "TrueCondition";
+        FlowFlags[FlowFlags["FalseCondition"] = 64] = "FalseCondition";
+        FlowFlags[FlowFlags["Referenced"] = 128] = "Referenced";
+        FlowFlags[FlowFlags["Shared"] = 256] = "Shared";
+        FlowFlags[FlowFlags["Label"] = 12] = "Label";
+        FlowFlags[FlowFlags["Condition"] = 96] = "Condition";
+    })(ts.FlowFlags || (ts.FlowFlags = {}));
+    var FlowFlags = ts.FlowFlags;
+    var OperationCanceledException = (function () {
+        function OperationCanceledException() {
+        }
+        return OperationCanceledException;
+    }());
+    ts.OperationCanceledException = OperationCanceledException;
+    /** Return code used by getEmitOutput function to indicate status of the function */
+    (function (ExitStatus) {
+        // Compiler ran successfully.  Either this was a simple do-nothing compilation (for example,
+        // when -version or -help was provided, or this was a normal compilation, no diagnostics
+        // were produced, and all outputs were generated successfully.
+        ExitStatus[ExitStatus["Success"] = 0] = "Success";
+        // Diagnostics were produced and because of them no code was generated.
+        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
+        // Diagnostics were produced and outputs were generated in spite of them.
+        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
+    })(ts.ExitStatus || (ts.ExitStatus = {}));
+    var ExitStatus = ts.ExitStatus;
+    (function (TypeFormatFlags) {
+        TypeFormatFlags[TypeFormatFlags["None"] = 0] = "None";
+        TypeFormatFlags[TypeFormatFlags["WriteArrayAsGenericType"] = 1] = "WriteArrayAsGenericType";
+        TypeFormatFlags[TypeFormatFlags["UseTypeOfFunction"] = 2] = "UseTypeOfFunction";
+        TypeFormatFlags[TypeFormatFlags["NoTruncation"] = 4] = "NoTruncation";
+        TypeFormatFlags[TypeFormatFlags["WriteArrowStyleSignature"] = 8] = "WriteArrowStyleSignature";
+        TypeFormatFlags[TypeFormatFlags["WriteOwnNameForAnyLike"] = 16] = "WriteOwnNameForAnyLike";
+        TypeFormatFlags[TypeFormatFlags["WriteTypeArgumentsOfSignature"] = 32] = "WriteTypeArgumentsOfSignature";
+        TypeFormatFlags[TypeFormatFlags["InElementType"] = 64] = "InElementType";
+        TypeFormatFlags[TypeFormatFlags["UseFullyQualifiedType"] = 128] = "UseFullyQualifiedType";
+        TypeFormatFlags[TypeFormatFlags["InFirstTypeArgument"] = 256] = "InFirstTypeArgument";
+    })(ts.TypeFormatFlags || (ts.TypeFormatFlags = {}));
+    var TypeFormatFlags = ts.TypeFormatFlags;
+    (function (SymbolFormatFlags) {
+        SymbolFormatFlags[SymbolFormatFlags["None"] = 0] = "None";
+        // Write symbols's type argument if it is instantiated symbol
+        // eg. class C<T> { p: T }   <-- Show p as C<T>.p here
+        //     var a: C<number>;
+        //     var p = a.p;  <--- Here p is property of C<number> so show it as C<number>.p instead of just C.p
+        SymbolFormatFlags[SymbolFormatFlags["WriteTypeParametersOrArguments"] = 1] = "WriteTypeParametersOrArguments";
+        // Use only external alias information to get the symbol name in the given context
+        // eg.  module m { export class c { } } import x = m.c;
+        // When this flag is specified m.c will be used to refer to the class instead of alias symbol x
+        SymbolFormatFlags[SymbolFormatFlags["UseOnlyExternalAliasing"] = 2] = "UseOnlyExternalAliasing";
+    })(ts.SymbolFormatFlags || (ts.SymbolFormatFlags = {}));
+    var SymbolFormatFlags = ts.SymbolFormatFlags;
+    /* @internal */
+    (function (SymbolAccessibility) {
+        SymbolAccessibility[SymbolAccessibility["Accessible"] = 0] = "Accessible";
+        SymbolAccessibility[SymbolAccessibility["NotAccessible"] = 1] = "NotAccessible";
+        SymbolAccessibility[SymbolAccessibility["CannotBeNamed"] = 2] = "CannotBeNamed";
+    })(ts.SymbolAccessibility || (ts.SymbolAccessibility = {}));
+    var SymbolAccessibility = ts.SymbolAccessibility;
+    (function (TypePredicateKind) {
+        TypePredicateKind[TypePredicateKind["This"] = 0] = "This";
+        TypePredicateKind[TypePredicateKind["Identifier"] = 1] = "Identifier";
+    })(ts.TypePredicateKind || (ts.TypePredicateKind = {}));
+    var TypePredicateKind = ts.TypePredicateKind;
+    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator
+      * metadata */
+    /* @internal */
+    (function (TypeReferenceSerializationKind) {
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
+        // should be emitted using a safe fallback.
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithConstructSignatureAndValue"] = 1] = "TypeWithConstructSignatureAndValue";
+        // function that can be reached at runtime (e.g. a `class`
+        // declaration or a `var` declaration for the static side
+        // of a type, such as the global `Promise` type in lib.d.ts).
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["VoidType"] = 2] = "VoidType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["NumberLikeType"] = 3] = "NumberLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["StringLikeType"] = 4] = "StringLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["BooleanType"] = 5] = "BooleanType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ArrayLikeType"] = 6] = "ArrayLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ESSymbolType"] = 7] = "ESSymbolType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 8] = "TypeWithCallSignature";
+        // with call signatures.
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 9] = "ObjectType";
+    })(ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
+    var TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind;
+    (function (SymbolFlags) {
+        SymbolFlags[SymbolFlags["None"] = 0] = "None";
+        SymbolFlags[SymbolFlags["FunctionScopedVariable"] = 1] = "FunctionScopedVariable";
+        SymbolFlags[SymbolFlags["BlockScopedVariable"] = 2] = "BlockScopedVariable";
+        SymbolFlags[SymbolFlags["Property"] = 4] = "Property";
+        SymbolFlags[SymbolFlags["EnumMember"] = 8] = "EnumMember";
+        SymbolFlags[SymbolFlags["Function"] = 16] = "Function";
+        SymbolFlags[SymbolFlags["Class"] = 32] = "Class";
+        SymbolFlags[SymbolFlags["Interface"] = 64] = "Interface";
+        SymbolFlags[SymbolFlags["ConstEnum"] = 128] = "ConstEnum";
+        SymbolFlags[SymbolFlags["RegularEnum"] = 256] = "RegularEnum";
+        SymbolFlags[SymbolFlags["ValueModule"] = 512] = "ValueModule";
+        SymbolFlags[SymbolFlags["NamespaceModule"] = 1024] = "NamespaceModule";
+        SymbolFlags[SymbolFlags["TypeLiteral"] = 2048] = "TypeLiteral";
+        SymbolFlags[SymbolFlags["ObjectLiteral"] = 4096] = "ObjectLiteral";
+        SymbolFlags[SymbolFlags["Method"] = 8192] = "Method";
+        SymbolFlags[SymbolFlags["Constructor"] = 16384] = "Constructor";
+        SymbolFlags[SymbolFlags["GetAccessor"] = 32768] = "GetAccessor";
+        SymbolFlags[SymbolFlags["SetAccessor"] = 65536] = "SetAccessor";
+        SymbolFlags[SymbolFlags["Signature"] = 131072] = "Signature";
+        SymbolFlags[SymbolFlags["TypeParameter"] = 262144] = "TypeParameter";
+        SymbolFlags[SymbolFlags["TypeAlias"] = 524288] = "TypeAlias";
+        SymbolFlags[SymbolFlags["ExportValue"] = 1048576] = "ExportValue";
+        SymbolFlags[SymbolFlags["ExportType"] = 2097152] = "ExportType";
+        SymbolFlags[SymbolFlags["ExportNamespace"] = 4194304] = "ExportNamespace";
+        SymbolFlags[SymbolFlags["Alias"] = 8388608] = "Alias";
+        SymbolFlags[SymbolFlags["Instantiated"] = 16777216] = "Instantiated";
+        SymbolFlags[SymbolFlags["Merged"] = 33554432] = "Merged";
+        SymbolFlags[SymbolFlags["Transient"] = 67108864] = "Transient";
+        SymbolFlags[SymbolFlags["Prototype"] = 134217728] = "Prototype";
+        SymbolFlags[SymbolFlags["SyntheticProperty"] = 268435456] = "SyntheticProperty";
+        SymbolFlags[SymbolFlags["Optional"] = 536870912] = "Optional";
+        SymbolFlags[SymbolFlags["ExportStar"] = 1073741824] = "ExportStar";
+        SymbolFlags[SymbolFlags["Enum"] = 384] = "Enum";
+        SymbolFlags[SymbolFlags["Variable"] = 3] = "Variable";
+        SymbolFlags[SymbolFlags["Value"] = 107455] = "Value";
+        SymbolFlags[SymbolFlags["Type"] = 793056] = "Type";
+        SymbolFlags[SymbolFlags["Namespace"] = 1536] = "Namespace";
+        SymbolFlags[SymbolFlags["Module"] = 1536] = "Module";
+        SymbolFlags[SymbolFlags["Accessor"] = 98304] = "Accessor";
+        // Variables can be redeclared, but can not redeclare a block-scoped declaration with the
+        // same name, or any other value that is not a variable, e.g. ValueModule or Class
+        SymbolFlags[SymbolFlags["FunctionScopedVariableExcludes"] = 107454] = "FunctionScopedVariableExcludes";
+        // Block-scoped declarations are not allowed to be re-declared
+        // they can not merge with anything in the value space
+        SymbolFlags[SymbolFlags["BlockScopedVariableExcludes"] = 107455] = "BlockScopedVariableExcludes";
+        SymbolFlags[SymbolFlags["ParameterExcludes"] = 107455] = "ParameterExcludes";
+        SymbolFlags[SymbolFlags["PropertyExcludes"] = 0] = "PropertyExcludes";
+        SymbolFlags[SymbolFlags["EnumMemberExcludes"] = 107455] = "EnumMemberExcludes";
+        SymbolFlags[SymbolFlags["FunctionExcludes"] = 106927] = "FunctionExcludes";
+        SymbolFlags[SymbolFlags["ClassExcludes"] = 899519] = "ClassExcludes";
+        SymbolFlags[SymbolFlags["InterfaceExcludes"] = 792960] = "InterfaceExcludes";
+        SymbolFlags[SymbolFlags["RegularEnumExcludes"] = 899327] = "RegularEnumExcludes";
+        SymbolFlags[SymbolFlags["ConstEnumExcludes"] = 899967] = "ConstEnumExcludes";
+        SymbolFlags[SymbolFlags["ValueModuleExcludes"] = 106639] = "ValueModuleExcludes";
+        SymbolFlags[SymbolFlags["NamespaceModuleExcludes"] = 0] = "NamespaceModuleExcludes";
+        SymbolFlags[SymbolFlags["MethodExcludes"] = 99263] = "MethodExcludes";
+        SymbolFlags[SymbolFlags["GetAccessorExcludes"] = 41919] = "GetAccessorExcludes";
+        SymbolFlags[SymbolFlags["SetAccessorExcludes"] = 74687] = "SetAccessorExcludes";
+        SymbolFlags[SymbolFlags["TypeParameterExcludes"] = 530912] = "TypeParameterExcludes";
+        SymbolFlags[SymbolFlags["TypeAliasExcludes"] = 793056] = "TypeAliasExcludes";
+        SymbolFlags[SymbolFlags["AliasExcludes"] = 8388608] = "AliasExcludes";
+        SymbolFlags[SymbolFlags["ModuleMember"] = 8914931] = "ModuleMember";
+        SymbolFlags[SymbolFlags["ExportHasLocal"] = 944] = "ExportHasLocal";
+        SymbolFlags[SymbolFlags["HasExports"] = 1952] = "HasExports";
+        SymbolFlags[SymbolFlags["HasMembers"] = 6240] = "HasMembers";
+        SymbolFlags[SymbolFlags["BlockScoped"] = 418] = "BlockScoped";
+        SymbolFlags[SymbolFlags["PropertyOrAccessor"] = 98308] = "PropertyOrAccessor";
+        SymbolFlags[SymbolFlags["Export"] = 7340032] = "Export";
+        /* @internal */
+        // The set of things we consider semantically classifiable.  Used to speed up the LS during
+        // classification.
+        SymbolFlags[SymbolFlags["Classifiable"] = 788448] = "Classifiable";
+    })(ts.SymbolFlags || (ts.SymbolFlags = {}));
+    var SymbolFlags = ts.SymbolFlags;
+    /* @internal */
+    (function (NodeCheckFlags) {
+        NodeCheckFlags[NodeCheckFlags["TypeChecked"] = 1] = "TypeChecked";
+        NodeCheckFlags[NodeCheckFlags["LexicalThis"] = 2] = "LexicalThis";
+        NodeCheckFlags[NodeCheckFlags["CaptureThis"] = 4] = "CaptureThis";
+        NodeCheckFlags[NodeCheckFlags["SuperInstance"] = 256] = "SuperInstance";
+        NodeCheckFlags[NodeCheckFlags["SuperStatic"] = 512] = "SuperStatic";
+        NodeCheckFlags[NodeCheckFlags["ContextChecked"] = 1024] = "ContextChecked";
+        NodeCheckFlags[NodeCheckFlags["AsyncMethodWithSuper"] = 2048] = "AsyncMethodWithSuper";
+        NodeCheckFlags[NodeCheckFlags["AsyncMethodWithSuperBinding"] = 4096] = "AsyncMethodWithSuperBinding";
+        NodeCheckFlags[NodeCheckFlags["CaptureArguments"] = 8192] = "CaptureArguments";
+        NodeCheckFlags[NodeCheckFlags["EnumValuesComputed"] = 16384] = "EnumValuesComputed";
+        NodeCheckFlags[NodeCheckFlags["LexicalModuleMergesWithClass"] = 32768] = "LexicalModuleMergesWithClass";
+        NodeCheckFlags[NodeCheckFlags["LoopWithCapturedBlockScopedBinding"] = 65536] = "LoopWithCapturedBlockScopedBinding";
+        NodeCheckFlags[NodeCheckFlags["CapturedBlockScopedBinding"] = 131072] = "CapturedBlockScopedBinding";
+        NodeCheckFlags[NodeCheckFlags["BlockScopedBindingInLoop"] = 262144] = "BlockScopedBindingInLoop";
+        NodeCheckFlags[NodeCheckFlags["ClassWithBodyScopedClassBinding"] = 524288] = "ClassWithBodyScopedClassBinding";
+        NodeCheckFlags[NodeCheckFlags["BodyScopedClassBinding"] = 1048576] = "BodyScopedClassBinding";
+        NodeCheckFlags[NodeCheckFlags["NeedsLoopOutParameter"] = 2097152] = "NeedsLoopOutParameter";
+    })(ts.NodeCheckFlags || (ts.NodeCheckFlags = {}));
+    var NodeCheckFlags = ts.NodeCheckFlags;
+    (function (TypeFlags) {
+        TypeFlags[TypeFlags["Any"] = 1] = "Any";
+        TypeFlags[TypeFlags["String"] = 2] = "String";
+        TypeFlags[TypeFlags["Number"] = 4] = "Number";
+        TypeFlags[TypeFlags["Boolean"] = 8] = "Boolean";
+        TypeFlags[TypeFlags["Void"] = 16] = "Void";
+        TypeFlags[TypeFlags["Undefined"] = 32] = "Undefined";
+        TypeFlags[TypeFlags["Null"] = 64] = "Null";
+        TypeFlags[TypeFlags["Enum"] = 128] = "Enum";
+        TypeFlags[TypeFlags["StringLiteral"] = 256] = "StringLiteral";
+        TypeFlags[TypeFlags["TypeParameter"] = 512] = "TypeParameter";
+        TypeFlags[TypeFlags["Class"] = 1024] = "Class";
+        TypeFlags[TypeFlags["Interface"] = 2048] = "Interface";
+        TypeFlags[TypeFlags["Reference"] = 4096] = "Reference";
+        TypeFlags[TypeFlags["Tuple"] = 8192] = "Tuple";
+        TypeFlags[TypeFlags["Union"] = 16384] = "Union";
+        TypeFlags[TypeFlags["Intersection"] = 32768] = "Intersection";
+        TypeFlags[TypeFlags["Anonymous"] = 65536] = "Anonymous";
+        TypeFlags[TypeFlags["Instantiated"] = 131072] = "Instantiated";
+        /* @internal */
+        TypeFlags[TypeFlags["FromSignature"] = 262144] = "FromSignature";
+        TypeFlags[TypeFlags["ObjectLiteral"] = 524288] = "ObjectLiteral";
+        /* @internal */
+        TypeFlags[TypeFlags["FreshObjectLiteral"] = 1048576] = "FreshObjectLiteral";
+        /* @internal */
+        TypeFlags[TypeFlags["ContainsWideningType"] = 2097152] = "ContainsWideningType";
+        /* @internal */
+        TypeFlags[TypeFlags["ContainsObjectLiteral"] = 4194304] = "ContainsObjectLiteral";
+        /* @internal */
+        TypeFlags[TypeFlags["ContainsAnyFunctionType"] = 8388608] = "ContainsAnyFunctionType";
+        TypeFlags[TypeFlags["ESSymbol"] = 16777216] = "ESSymbol";
+        TypeFlags[TypeFlags["ThisType"] = 33554432] = "ThisType";
+        TypeFlags[TypeFlags["ObjectLiteralPatternWithComputedProperties"] = 67108864] = "ObjectLiteralPatternWithComputedProperties";
+        TypeFlags[TypeFlags["Never"] = 134217728] = "Never";
+        /* @internal */
+        TypeFlags[TypeFlags["Nullable"] = 96] = "Nullable";
+        TypeFlags[TypeFlags["Falsy"] = 126] = "Falsy";
+        /* @internal */
+        TypeFlags[TypeFlags["Intrinsic"] = 150995071] = "Intrinsic";
+        /* @internal */
+        TypeFlags[TypeFlags["Primitive"] = 16777726] = "Primitive";
+        TypeFlags[TypeFlags["StringLike"] = 258] = "StringLike";
+        TypeFlags[TypeFlags["NumberLike"] = 132] = "NumberLike";
+        TypeFlags[TypeFlags["ObjectType"] = 80896] = "ObjectType";
+        TypeFlags[TypeFlags["UnionOrIntersection"] = 49152] = "UnionOrIntersection";
+        TypeFlags[TypeFlags["StructuredType"] = 130048] = "StructuredType";
+        // 'Narrowable' types are types where narrowing actually narrows.
+        // This *should* be every type other than null, undefined, void, and never
+        TypeFlags[TypeFlags["Narrowable"] = 16908175] = "Narrowable";
+        /* @internal */
+        TypeFlags[TypeFlags["RequiresWidening"] = 6291456] = "RequiresWidening";
+        /* @internal */
+        TypeFlags[TypeFlags["PropagatingFlags"] = 14680064] = "PropagatingFlags";
+    })(ts.TypeFlags || (ts.TypeFlags = {}));
+    var TypeFlags = ts.TypeFlags;
+    (function (SignatureKind) {
+        SignatureKind[SignatureKind["Call"] = 0] = "Call";
+        SignatureKind[SignatureKind["Construct"] = 1] = "Construct";
+    })(ts.SignatureKind || (ts.SignatureKind = {}));
+    var SignatureKind = ts.SignatureKind;
+    (function (IndexKind) {
+        IndexKind[IndexKind["String"] = 0] = "String";
+        IndexKind[IndexKind["Number"] = 1] = "Number";
+    })(ts.IndexKind || (ts.IndexKind = {}));
+    var IndexKind = ts.IndexKind;
+    /* @internal */
+    (function (SpecialPropertyAssignmentKind) {
+        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["None"] = 0] = "None";
+        /// exports.name = expr
+        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ExportsProperty"] = 1] = "ExportsProperty";
+        /// module.exports = expr
+        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ModuleExports"] = 2] = "ModuleExports";
+        /// className.prototype.name = expr
+        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["PrototypeProperty"] = 3] = "PrototypeProperty";
+        /// this.name = expr
+        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ThisProperty"] = 4] = "ThisProperty";
+    })(ts.SpecialPropertyAssignmentKind || (ts.SpecialPropertyAssignmentKind = {}));
+    var SpecialPropertyAssignmentKind = ts.SpecialPropertyAssignmentKind;
+    (function (DiagnosticCategory) {
+        DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
+        DiagnosticCategory[DiagnosticCategory["Error"] = 1] = "Error";
+        DiagnosticCategory[DiagnosticCategory["Message"] = 2] = "Message";
+    })(ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
+    var DiagnosticCategory = ts.DiagnosticCategory;
+    (function (ModuleResolutionKind) {
+        ModuleResolutionKind[ModuleResolutionKind["Classic"] = 1] = "Classic";
+        ModuleResolutionKind[ModuleResolutionKind["NodeJs"] = 2] = "NodeJs";
+    })(ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
+    var ModuleResolutionKind = ts.ModuleResolutionKind;
+    (function (ModuleKind) {
+        ModuleKind[ModuleKind["None"] = 0] = "None";
+        ModuleKind[ModuleKind["CommonJS"] = 1] = "CommonJS";
+        ModuleKind[ModuleKind["AMD"] = 2] = "AMD";
+        ModuleKind[ModuleKind["UMD"] = 3] = "UMD";
+        ModuleKind[ModuleKind["System"] = 4] = "System";
+        ModuleKind[ModuleKind["ES6"] = 5] = "ES6";
+        ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
+    })(ts.ModuleKind || (ts.ModuleKind = {}));
+    var ModuleKind = ts.ModuleKind;
+    (function (JsxEmit) {
+        JsxEmit[JsxEmit["None"] = 0] = "None";
+        JsxEmit[JsxEmit["Preserve"] = 1] = "Preserve";
+        JsxEmit[JsxEmit["React"] = 2] = "React";
+    })(ts.JsxEmit || (ts.JsxEmit = {}));
+    var JsxEmit = ts.JsxEmit;
+    (function (NewLineKind) {
+        NewLineKind[NewLineKind["CarriageReturnLineFeed"] = 0] = "CarriageReturnLineFeed";
+        NewLineKind[NewLineKind["LineFeed"] = 1] = "LineFeed";
+    })(ts.NewLineKind || (ts.NewLineKind = {}));
+    var NewLineKind = ts.NewLineKind;
+    (function (ScriptKind) {
+        ScriptKind[ScriptKind["Unknown"] = 0] = "Unknown";
+        ScriptKind[ScriptKind["JS"] = 1] = "JS";
+        ScriptKind[ScriptKind["JSX"] = 2] = "JSX";
+        ScriptKind[ScriptKind["TS"] = 3] = "TS";
+        ScriptKind[ScriptKind["TSX"] = 4] = "TSX";
+    })(ts.ScriptKind || (ts.ScriptKind = {}));
+    var ScriptKind = ts.ScriptKind;
+    (function (ScriptTarget) {
+        ScriptTarget[ScriptTarget["ES3"] = 0] = "ES3";
+        ScriptTarget[ScriptTarget["ES5"] = 1] = "ES5";
+        ScriptTarget[ScriptTarget["ES6"] = 2] = "ES6";
+        ScriptTarget[ScriptTarget["ES2015"] = 2] = "ES2015";
+        ScriptTarget[ScriptTarget["Latest"] = 2] = "Latest";
+    })(ts.ScriptTarget || (ts.ScriptTarget = {}));
+    var ScriptTarget = ts.ScriptTarget;
+    (function (LanguageVariant) {
+        LanguageVariant[LanguageVariant["Standard"] = 0] = "Standard";
+        LanguageVariant[LanguageVariant["JSX"] = 1] = "JSX";
+    })(ts.LanguageVariant || (ts.LanguageVariant = {}));
+    var LanguageVariant = ts.LanguageVariant;
+    /* @internal */
+    (function (DiagnosticStyle) {
+        DiagnosticStyle[DiagnosticStyle["Simple"] = 0] = "Simple";
+        DiagnosticStyle[DiagnosticStyle["Pretty"] = 1] = "Pretty";
+    })(ts.DiagnosticStyle || (ts.DiagnosticStyle = {}));
+    var DiagnosticStyle = ts.DiagnosticStyle;
+    /* @internal */
+    (function (CharacterCodes) {
+        CharacterCodes[CharacterCodes["nullCharacter"] = 0] = "nullCharacter";
+        CharacterCodes[CharacterCodes["maxAsciiCharacter"] = 127] = "maxAsciiCharacter";
+        CharacterCodes[CharacterCodes["lineFeed"] = 10] = "lineFeed";
+        CharacterCodes[CharacterCodes["carriageReturn"] = 13] = "carriageReturn";
+        CharacterCodes[CharacterCodes["lineSeparator"] = 8232] = "lineSeparator";
+        CharacterCodes[CharacterCodes["paragraphSeparator"] = 8233] = "paragraphSeparator";
+        CharacterCodes[CharacterCodes["nextLine"] = 133] = "nextLine";
+        // Unicode 3.0 space characters
+        CharacterCodes[CharacterCodes["space"] = 32] = "space";
+        CharacterCodes[CharacterCodes["nonBreakingSpace"] = 160] = "nonBreakingSpace";
+        CharacterCodes[CharacterCodes["enQuad"] = 8192] = "enQuad";
+        CharacterCodes[CharacterCodes["emQuad"] = 8193] = "emQuad";
+        CharacterCodes[CharacterCodes["enSpace"] = 8194] = "enSpace";
+        CharacterCodes[CharacterCodes["emSpace"] = 8195] = "emSpace";
+        CharacterCodes[CharacterCodes["threePerEmSpace"] = 8196] = "threePerEmSpace";
+        CharacterCodes[CharacterCodes["fourPerEmSpace"] = 8197] = "fourPerEmSpace";
+        CharacterCodes[CharacterCodes["sixPerEmSpace"] = 8198] = "sixPerEmSpace";
+        CharacterCodes[CharacterCodes["figureSpace"] = 8199] = "figureSpace";
+        CharacterCodes[CharacterCodes["punctuationSpace"] = 8200] = "punctuationSpace";
+        CharacterCodes[CharacterCodes["thinSpace"] = 8201] = "thinSpace";
+        CharacterCodes[CharacterCodes["hairSpace"] = 8202] = "hairSpace";
+        CharacterCodes[CharacterCodes["zeroWidthSpace"] = 8203] = "zeroWidthSpace";
+        CharacterCodes[CharacterCodes["narrowNoBreakSpace"] = 8239] = "narrowNoBreakSpace";
+        CharacterCodes[CharacterCodes["ideographicSpace"] = 12288] = "ideographicSpace";
+        CharacterCodes[CharacterCodes["mathematicalSpace"] = 8287] = "mathematicalSpace";
+        CharacterCodes[CharacterCodes["ogham"] = 5760] = "ogham";
+        CharacterCodes[CharacterCodes["_"] = 95] = "_";
+        CharacterCodes[CharacterCodes["$"] = 36] = "$";
+        CharacterCodes[CharacterCodes["_0"] = 48] = "_0";
+        CharacterCodes[CharacterCodes["_1"] = 49] = "_1";
+        CharacterCodes[CharacterCodes["_2"] = 50] = "_2";
+        CharacterCodes[CharacterCodes["_3"] = 51] = "_3";
+        CharacterCodes[CharacterCodes["_4"] = 52] = "_4";
+        CharacterCodes[CharacterCodes["_5"] = 53] = "_5";
+        CharacterCodes[CharacterCodes["_6"] = 54] = "_6";
+        CharacterCodes[CharacterCodes["_7"] = 55] = "_7";
+        CharacterCodes[CharacterCodes["_8"] = 56] = "_8";
+        CharacterCodes[CharacterCodes["_9"] = 57] = "_9";
+        CharacterCodes[CharacterCodes["a"] = 97] = "a";
+        CharacterCodes[CharacterCodes["b"] = 98] = "b";
+        CharacterCodes[CharacterCodes["c"] = 99] = "c";
+        CharacterCodes[CharacterCodes["d"] = 100] = "d";
+        CharacterCodes[CharacterCodes["e"] = 101] = "e";
+        CharacterCodes[CharacterCodes["f"] = 102] = "f";
+        CharacterCodes[CharacterCodes["g"] = 103] = "g";
+        CharacterCodes[CharacterCodes["h"] = 104] = "h";
+        CharacterCodes[CharacterCodes["i"] = 105] = "i";
+        CharacterCodes[CharacterCodes["j"] = 106] = "j";
+        CharacterCodes[CharacterCodes["k"] = 107] = "k";
+        CharacterCodes[CharacterCodes["l"] = 108] = "l";
+        CharacterCodes[CharacterCodes["m"] = 109] = "m";
+        CharacterCodes[CharacterCodes["n"] = 110] = "n";
+        CharacterCodes[CharacterCodes["o"] = 111] = "o";
+        CharacterCodes[CharacterCodes["p"] = 112] = "p";
+        CharacterCodes[CharacterCodes["q"] = 113] = "q";
+        CharacterCodes[CharacterCodes["r"] = 114] = "r";
+        CharacterCodes[CharacterCodes["s"] = 115] = "s";
+        CharacterCodes[CharacterCodes["t"] = 116] = "t";
+        CharacterCodes[CharacterCodes["u"] = 117] = "u";
+        CharacterCodes[CharacterCodes["v"] = 118] = "v";
+        CharacterCodes[CharacterCodes["w"] = 119] = "w";
+        CharacterCodes[CharacterCodes["x"] = 120] = "x";
+        CharacterCodes[CharacterCodes["y"] = 121] = "y";
+        CharacterCodes[CharacterCodes["z"] = 122] = "z";
+        CharacterCodes[CharacterCodes["A"] = 65] = "A";
+        CharacterCodes[CharacterCodes["B"] = 66] = "B";
+        CharacterCodes[CharacterCodes["C"] = 67] = "C";
+        CharacterCodes[CharacterCodes["D"] = 68] = "D";
+        CharacterCodes[CharacterCodes["E"] = 69] = "E";
+        CharacterCodes[CharacterCodes["F"] = 70] = "F";
+        CharacterCodes[CharacterCodes["G"] = 71] = "G";
+        CharacterCodes[CharacterCodes["H"] = 72] = "H";
+        CharacterCodes[CharacterCodes["I"] = 73] = "I";
+        CharacterCodes[CharacterCodes["J"] = 74] = "J";
+        CharacterCodes[CharacterCodes["K"] = 75] = "K";
+        CharacterCodes[CharacterCodes["L"] = 76] = "L";
+        CharacterCodes[CharacterCodes["M"] = 77] = "M";
+        CharacterCodes[CharacterCodes["N"] = 78] = "N";
+        CharacterCodes[CharacterCodes["O"] = 79] = "O";
+        CharacterCodes[CharacterCodes["P"] = 80] = "P";
+        CharacterCodes[CharacterCodes["Q"] = 81] = "Q";
+        CharacterCodes[CharacterCodes["R"] = 82] = "R";
+        CharacterCodes[CharacterCodes["S"] = 83] = "S";
+        CharacterCodes[CharacterCodes["T"] = 84] = "T";
+        CharacterCodes[CharacterCodes["U"] = 85] = "U";
+        CharacterCodes[CharacterCodes["V"] = 86] = "V";
+        CharacterCodes[CharacterCodes["W"] = 87] = "W";
+        CharacterCodes[CharacterCodes["X"] = 88] = "X";
+        CharacterCodes[CharacterCodes["Y"] = 89] = "Y";
+        CharacterCodes[CharacterCodes["Z"] = 90] = "Z";
+        CharacterCodes[CharacterCodes["ampersand"] = 38] = "ampersand";
+        CharacterCodes[CharacterCodes["asterisk"] = 42] = "asterisk";
+        CharacterCodes[CharacterCodes["at"] = 64] = "at";
+        CharacterCodes[CharacterCodes["backslash"] = 92] = "backslash";
+        CharacterCodes[CharacterCodes["backtick"] = 96] = "backtick";
+        CharacterCodes[CharacterCodes["bar"] = 124] = "bar";
+        CharacterCodes[CharacterCodes["caret"] = 94] = "caret";
+        CharacterCodes[CharacterCodes["closeBrace"] = 125] = "closeBrace";
+        CharacterCodes[CharacterCodes["closeBracket"] = 93] = "closeBracket";
+        CharacterCodes[CharacterCodes["closeParen"] = 41] = "closeParen";
+        CharacterCodes[CharacterCodes["colon"] = 58] = "colon";
+        CharacterCodes[CharacterCodes["comma"] = 44] = "comma";
+        CharacterCodes[CharacterCodes["dot"] = 46] = "dot";
+        CharacterCodes[CharacterCodes["doubleQuote"] = 34] = "doubleQuote";
+        CharacterCodes[CharacterCodes["equals"] = 61] = "equals";
+        CharacterCodes[CharacterCodes["exclamation"] = 33] = "exclamation";
+        CharacterCodes[CharacterCodes["greaterThan"] = 62] = "greaterThan";
+        CharacterCodes[CharacterCodes["hash"] = 35] = "hash";
+        CharacterCodes[CharacterCodes["lessThan"] = 60] = "lessThan";
+        CharacterCodes[CharacterCodes["minus"] = 45] = "minus";
+        CharacterCodes[CharacterCodes["openBrace"] = 123] = "openBrace";
+        CharacterCodes[CharacterCodes["openBracket"] = 91] = "openBracket";
+        CharacterCodes[CharacterCodes["openParen"] = 40] = "openParen";
+        CharacterCodes[CharacterCodes["percent"] = 37] = "percent";
+        CharacterCodes[CharacterCodes["plus"] = 43] = "plus";
+        CharacterCodes[CharacterCodes["question"] = 63] = "question";
+        CharacterCodes[CharacterCodes["semicolon"] = 59] = "semicolon";
+        CharacterCodes[CharacterCodes["singleQuote"] = 39] = "singleQuote";
+        CharacterCodes[CharacterCodes["slash"] = 47] = "slash";
+        CharacterCodes[CharacterCodes["tilde"] = 126] = "tilde";
+        CharacterCodes[CharacterCodes["backspace"] = 8] = "backspace";
+        CharacterCodes[CharacterCodes["formFeed"] = 12] = "formFeed";
+        CharacterCodes[CharacterCodes["byteOrderMark"] = 65279] = "byteOrderMark";
+        CharacterCodes[CharacterCodes["tab"] = 9] = "tab";
+        CharacterCodes[CharacterCodes["verticalTab"] = 11] = "verticalTab";
+    })(ts.CharacterCodes || (ts.CharacterCodes = {}));
+    var CharacterCodes = ts.CharacterCodes;
+})(ts || (ts = {}));
+/// <reference path="types.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    /**
+     * Ternary values are defined such that
+     * x & y is False if either x or y is False.
+     * x & y is Maybe if either x or y is Maybe, but neither x or y is False.
+     * x & y is True if both x and y are True.
+     * x | y is False if both x and y are False.
+     * x | y is Maybe if either x or y is Maybe, but neither x or y is True.
+     * x | y is True if either x or y is True.
+     */
+    (function (Ternary) {
+        Ternary[Ternary["False"] = 0] = "False";
+        Ternary[Ternary["Maybe"] = 1] = "Maybe";
+        Ternary[Ternary["True"] = -1] = "True";
+    })(ts.Ternary || (ts.Ternary = {}));
+    var Ternary = ts.Ternary;
+    function createFileMap(keyMapper) {
+        var files = {};
+        return {
+            get: get,
+            set: set,
+            contains: contains,
+            remove: remove,
+            forEachValue: forEachValueInMap,
+            clear: clear
+        };
+        function forEachValueInMap(f) {
+            for (var key in files) {
+                f(key, files[key]);
+            }
+        }
+        // path should already be well-formed so it does not need to be normalized
+        function get(path) {
+            return files[toKey(path)];
+        }
+        function set(path, value) {
+            files[toKey(path)] = value;
+        }
+        function contains(path) {
+            return hasProperty(files, toKey(path));
+        }
+        function remove(path) {
+            var key = toKey(path);
+            delete files[key];
+        }
+        function clear() {
+            files = {};
+        }
+        function toKey(path) {
+            return keyMapper ? keyMapper(path) : path;
+        }
+    }
+    ts.createFileMap = createFileMap;
+    function toPath(fileName, basePath, getCanonicalFileName) {
+        var nonCanonicalizedPath = isRootedDiskPath(fileName)
+            ? normalizePath(fileName)
+            : getNormalizedAbsolutePath(fileName, basePath);
+        return getCanonicalFileName(nonCanonicalizedPath);
+    }
+    ts.toPath = toPath;
+    (function (Comparison) {
+        Comparison[Comparison["LessThan"] = -1] = "LessThan";
+        Comparison[Comparison["EqualTo"] = 0] = "EqualTo";
+        Comparison[Comparison["GreaterThan"] = 1] = "GreaterThan";
+    })(ts.Comparison || (ts.Comparison = {}));
+    var Comparison = ts.Comparison;
+    /**
+     * Iterates through 'array' by index and performs the callback on each element of array until the callback
+     * returns a truthy value, then returns that value.
+     * If no such value is found, the callback is applied to each element of array and undefined is returned.
+     */
+    function forEach(array, callback) {
+        if (array) {
+            for (var i = 0, len = array.length; i < len; i++) {
+                var result = callback(array[i], i);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.forEach = forEach;
+    function contains(array, value, areEqual) {
+        if (array) {
+            for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
+                var v = array_1[_i];
+                if (areEqual ? areEqual(v, value) : v === value) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+    ts.contains = contains;
+    function indexOf(array, value) {
+        if (array) {
+            for (var i = 0, len = array.length; i < len; i++) {
+                if (array[i] === value) {
+                    return i;
+                }
+            }
+        }
+        return -1;
+    }
+    ts.indexOf = indexOf;
+    function countWhere(array, predicate) {
+        var count = 0;
+        if (array) {
+            for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
+                var v = array_2[_i];
+                if (predicate(v)) {
+                    count++;
+                }
+            }
+        }
+        return count;
+    }
+    ts.countWhere = countWhere;
+    function filter(array, f) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_3 = array; _i < array_3.length; _i++) {
+                var item = array_3[_i];
+                if (f(item)) {
+                    result.push(item);
+                }
+            }
+        }
+        return result;
+    }
+    ts.filter = filter;
+    function map(array, f) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_4 = array; _i < array_4.length; _i++) {
+                var v = array_4[_i];
+                result.push(f(v));
+            }
+        }
+        return result;
+    }
+    ts.map = map;
+    function concatenate(array1, array2) {
+        if (!array2 || !array2.length)
+            return array1;
+        if (!array1 || !array1.length)
+            return array2;
+        return array1.concat(array2);
+    }
+    ts.concatenate = concatenate;
+    function deduplicate(array, areEqual) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
+                var item = array_5[_i];
+                if (!contains(result, item, areEqual)) {
+                    result.push(item);
+                }
+            }
+        }
+        return result;
+    }
+    ts.deduplicate = deduplicate;
+    function sum(array, prop) {
+        var result = 0;
+        for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
+            var v = array_6[_i];
+            result += v[prop];
+        }
+        return result;
+    }
+    ts.sum = sum;
+    function addRange(to, from) {
+        if (to && from) {
+            for (var _i = 0, from_1 = from; _i < from_1.length; _i++) {
+                var v = from_1[_i];
+                to.push(v);
+            }
+        }
+    }
+    ts.addRange = addRange;
+    function rangeEquals(array1, array2, pos, end) {
+        while (pos < end) {
+            if (array1[pos] !== array2[pos]) {
+                return false;
+            }
+            pos++;
+        }
+        return true;
+    }
+    ts.rangeEquals = rangeEquals;
+    /**
+     * Returns the last element of an array if non-empty, undefined otherwise.
+     */
+    function lastOrUndefined(array) {
+        if (array.length === 0) {
+            return undefined;
+        }
+        return array[array.length - 1];
+    }
+    ts.lastOrUndefined = lastOrUndefined;
+    /**
+     * Performs a binary search, finding the index at which 'value' occurs in 'array'.
+     * If no such index is found, returns the 2's-complement of first index at which
+     * number[index] exceeds number.
+     * @param array A sorted array whose first element must be no larger than number
+     * @param number The value to be searched for in the array.
+     */
+    function binarySearch(array, value) {
+        var low = 0;
+        var high = array.length - 1;
+        while (low <= high) {
+            var middle = low + ((high - low) >> 1);
+            var midValue = array[middle];
+            if (midValue === value) {
+                return middle;
+            }
+            else if (midValue > value) {
+                high = middle - 1;
+            }
+            else {
+                low = middle + 1;
+            }
+        }
+        return ~low;
+    }
+    ts.binarySearch = binarySearch;
+    function reduceLeft(array, f, initial) {
+        if (array) {
+            var count = array.length;
+            if (count > 0) {
+                var pos = 0;
+                var result = void 0;
+                if (arguments.length <= 2) {
+                    result = array[pos];
+                    pos++;
+                }
+                else {
+                    result = initial;
+                }
+                while (pos < count) {
+                    result = f(result, array[pos]);
+                    pos++;
+                }
+                return result;
+            }
+        }
+        return initial;
+    }
+    ts.reduceLeft = reduceLeft;
+    function reduceRight(array, f, initial) {
+        if (array) {
+            var pos = array.length - 1;
+            if (pos >= 0) {
+                var result = void 0;
+                if (arguments.length <= 2) {
+                    result = array[pos];
+                    pos--;
+                }
+                else {
+                    result = initial;
+                }
+                while (pos >= 0) {
+                    result = f(result, array[pos]);
+                    pos--;
+                }
+                return result;
+            }
+        }
+        return initial;
+    }
+    ts.reduceRight = reduceRight;
+    var hasOwnProperty = Object.prototype.hasOwnProperty;
+    function hasProperty(map, key) {
+        return hasOwnProperty.call(map, key);
+    }
+    ts.hasProperty = hasProperty;
+    function getKeys(map) {
+        var keys = [];
+        for (var key in map) {
+            keys.push(key);
+        }
+        return keys;
+    }
+    ts.getKeys = getKeys;
+    function getProperty(map, key) {
+        return hasOwnProperty.call(map, key) ? map[key] : undefined;
+    }
+    ts.getProperty = getProperty;
+    function isEmpty(map) {
+        for (var id in map) {
+            if (hasProperty(map, id)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.isEmpty = isEmpty;
+    function clone(object) {
+        var result = {};
+        for (var id in object) {
+            result[id] = object[id];
+        }
+        return result;
+    }
+    ts.clone = clone;
+    function extend(first, second) {
+        var result = {};
+        for (var id in first) {
+            result[id] = first[id];
+        }
+        for (var id in second) {
+            if (!hasProperty(result, id)) {
+                result[id] = second[id];
+            }
+        }
+        return result;
+    }
+    ts.extend = extend;
+    function forEachValue(map, callback) {
+        var result;
+        for (var id in map) {
+            if (result = callback(map[id]))
+                break;
+        }
+        return result;
+    }
+    ts.forEachValue = forEachValue;
+    function forEachKey(map, callback) {
+        var result;
+        for (var id in map) {
+            if (result = callback(id))
+                break;
+        }
+        return result;
+    }
+    ts.forEachKey = forEachKey;
+    function lookUp(map, key) {
+        return hasProperty(map, key) ? map[key] : undefined;
+    }
+    ts.lookUp = lookUp;
+    function copyMap(source, target) {
+        for (var p in source) {
+            target[p] = source[p];
+        }
+    }
+    ts.copyMap = copyMap;
+    /**
+     * Creates a map from the elements of an array.
+     *
+     * @param array the array of input elements.
+     * @param makeKey a function that produces a key for a given element.
+     *
+     * This function makes no effort to avoid collisions; if any two elements produce
+     * the same key with the given 'makeKey' function, then the element with the higher
+     * index in the array will be the one associated with the produced key.
+     */
+    function arrayToMap(array, makeKey) {
+        var result = {};
+        forEach(array, function (value) {
+            result[makeKey(value)] = value;
+        });
+        return result;
+    }
+    ts.arrayToMap = arrayToMap;
+    /**
+     * Reduce the properties of a map.
+     *
+     * @param map The map to reduce
+     * @param callback An aggregation function that is called for each entry in the map
+     * @param initial The initial value for the reduction.
+     */
+    function reduceProperties(map, callback, initial) {
+        var result = initial;
+        if (map) {
+            for (var key in map) {
+                if (hasProperty(map, key)) {
+                    result = callback(result, map[key], String(key));
+                }
+            }
+        }
+        return result;
+    }
+    ts.reduceProperties = reduceProperties;
+    /**
+     * Tests whether a value is an array.
+     */
+    function isArray(value) {
+        return Array.isArray ? Array.isArray(value) : value instanceof Array;
+    }
+    ts.isArray = isArray;
+    function memoize(callback) {
+        var value;
+        return function () {
+            if (callback) {
+                value = callback();
+                callback = undefined;
+            }
+            return value;
+        };
+    }
+    ts.memoize = memoize;
+    function formatStringFromArgs(text, args, baseIndex) {
+        baseIndex = baseIndex || 0;
+        return text.replace(/{(\d+)}/g, function (match, index) { return args[+index + baseIndex]; });
+    }
+    ts.localizedDiagnosticMessages = undefined;
+    function getLocaleSpecificMessage(message) {
+        return ts.localizedDiagnosticMessages && ts.localizedDiagnosticMessages[message.key]
+            ? ts.localizedDiagnosticMessages[message.key]
+            : message.message;
+    }
+    ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
+    function createFileDiagnostic(file, start, length, message) {
+        var end = start + length;
+        Debug.assert(start >= 0, "start must be non-negative, is " + start);
+        Debug.assert(length >= 0, "length must be non-negative, is " + length);
+        if (file) {
+            Debug.assert(start <= file.text.length, "start must be within the bounds of the file. " + start + " > " + file.text.length);
+            Debug.assert(end <= file.text.length, "end must be the bounds of the file. " + end + " > " + file.text.length);
+        }
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 4) {
+            text = formatStringFromArgs(text, arguments, 4);
+        }
+        return {
+            file: file,
+            start: start,
+            length: length,
+            messageText: text,
+            category: message.category,
+            code: message.code
+        };
+    }
+    ts.createFileDiagnostic = createFileDiagnostic;
+    /* internal */
+    function formatMessage(dummy, message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 2) {
+            text = formatStringFromArgs(text, arguments, 2);
+        }
+        return text;
+    }
+    ts.formatMessage = formatMessage;
+    function createCompilerDiagnostic(message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 1) {
+            text = formatStringFromArgs(text, arguments, 1);
+        }
+        return {
+            file: undefined,
+            start: undefined,
+            length: undefined,
+            messageText: text,
+            category: message.category,
+            code: message.code
+        };
+    }
+    ts.createCompilerDiagnostic = createCompilerDiagnostic;
+    function chainDiagnosticMessages(details, message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 2) {
+            text = formatStringFromArgs(text, arguments, 2);
+        }
+        return {
+            messageText: text,
+            category: message.category,
+            code: message.code,
+            next: details
+        };
+    }
+    ts.chainDiagnosticMessages = chainDiagnosticMessages;
+    function concatenateDiagnosticMessageChains(headChain, tailChain) {
+        var lastChain = headChain;
+        while (lastChain.next) {
+            lastChain = lastChain.next;
+        }
+        lastChain.next = tailChain;
+        return headChain;
+    }
+    ts.concatenateDiagnosticMessageChains = concatenateDiagnosticMessageChains;
+    function compareValues(a, b) {
+        if (a === b)
+            return 0 /* EqualTo */;
+        if (a === undefined)
+            return -1 /* LessThan */;
+        if (b === undefined)
+            return 1 /* GreaterThan */;
+        return a < b ? -1 /* LessThan */ : 1 /* GreaterThan */;
+    }
+    ts.compareValues = compareValues;
+    function getDiagnosticFileName(diagnostic) {
+        return diagnostic.file ? diagnostic.file.fileName : undefined;
+    }
+    function compareDiagnostics(d1, d2) {
+        return compareValues(getDiagnosticFileName(d1), getDiagnosticFileName(d2)) ||
+            compareValues(d1.start, d2.start) ||
+            compareValues(d1.length, d2.length) ||
+            compareValues(d1.code, d2.code) ||
+            compareMessageText(d1.messageText, d2.messageText) ||
+            0 /* EqualTo */;
+    }
+    ts.compareDiagnostics = compareDiagnostics;
+    function compareMessageText(text1, text2) {
+        while (text1 && text2) {
+            // We still have both chains.
+            var string1 = typeof text1 === "string" ? text1 : text1.messageText;
+            var string2 = typeof text2 === "string" ? text2 : text2.messageText;
+            var res = compareValues(string1, string2);
+            if (res) {
+                return res;
+            }
+            text1 = typeof text1 === "string" ? undefined : text1.next;
+            text2 = typeof text2 === "string" ? undefined : text2.next;
+        }
+        if (!text1 && !text2) {
+            // if the chains are done, then these messages are the same.
+            return 0 /* EqualTo */;
+        }
+        // We still have one chain remaining.  The shorter chain should come first.
+        return text1 ? 1 /* GreaterThan */ : -1 /* LessThan */;
+    }
+    function sortAndDeduplicateDiagnostics(diagnostics) {
+        return deduplicateSortedDiagnostics(diagnostics.sort(compareDiagnostics));
+    }
+    ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
+    function deduplicateSortedDiagnostics(diagnostics) {
+        if (diagnostics.length < 2) {
+            return diagnostics;
+        }
+        var newDiagnostics = [diagnostics[0]];
+        var previousDiagnostic = diagnostics[0];
+        for (var i = 1; i < diagnostics.length; i++) {
+            var currentDiagnostic = diagnostics[i];
+            var isDupe = compareDiagnostics(currentDiagnostic, previousDiagnostic) === 0 /* EqualTo */;
+            if (!isDupe) {
+                newDiagnostics.push(currentDiagnostic);
+                previousDiagnostic = currentDiagnostic;
+            }
+        }
+        return newDiagnostics;
+    }
+    ts.deduplicateSortedDiagnostics = deduplicateSortedDiagnostics;
+    function normalizeSlashes(path) {
+        return path.replace(/\\/g, "/");
+    }
+    ts.normalizeSlashes = normalizeSlashes;
+    // Returns length of path root (i.e. length of "/", "x:/", "//server/share/, file:///user/files")
+    function getRootLength(path) {
+        if (path.charCodeAt(0) === 47 /* slash */) {
+            if (path.charCodeAt(1) !== 47 /* slash */)
+                return 1;
+            var p1 = path.indexOf("/", 2);
+            if (p1 < 0)
+                return 2;
+            var p2 = path.indexOf("/", p1 + 1);
+            if (p2 < 0)
+                return p1 + 1;
+            return p2 + 1;
+        }
+        if (path.charCodeAt(1) === 58 /* colon */) {
+            if (path.charCodeAt(2) === 47 /* slash */)
+                return 3;
+            return 2;
+        }
+        // Per RFC 1738 'file' URI schema has the shape file://<host>/<path>
+        // if <host> is omitted then it is assumed that host value is 'localhost',
+        // however slash after the omitted <host> is not removed.
+        // file:///folder1/file1 - this is a correct URI
+        // file://folder2/file2 - this is an incorrect URI
+        if (path.lastIndexOf("file:///", 0) === 0) {
+            return "file:///".length;
+        }
+        var idx = path.indexOf("://");
+        if (idx !== -1) {
+            return idx + "://".length;
+        }
+        return 0;
+    }
+    ts.getRootLength = getRootLength;
+    ts.directorySeparator = "/";
+    function getNormalizedParts(normalizedSlashedPath, rootLength) {
+        var parts = normalizedSlashedPath.substr(rootLength).split(ts.directorySeparator);
+        var normalized = [];
+        for (var _i = 0, parts_1 = parts; _i < parts_1.length; _i++) {
+            var part = parts_1[_i];
+            if (part !== ".") {
+                if (part === ".." && normalized.length > 0 && lastOrUndefined(normalized) !== "..") {
+                    normalized.pop();
+                }
+                else {
+                    // A part may be an empty string (which is 'falsy') if the path had consecutive slashes,
+                    // e.g. "path//file.ts".  Drop these before re-joining the parts.
+                    if (part) {
+                        normalized.push(part);
+                    }
+                }
+            }
+        }
+        return normalized;
+    }
+    function normalizePath(path) {
+        path = normalizeSlashes(path);
+        var rootLength = getRootLength(path);
+        var normalized = getNormalizedParts(path, rootLength);
+        return path.substr(0, rootLength) + normalized.join(ts.directorySeparator);
+    }
+    ts.normalizePath = normalizePath;
+    function getDirectoryPath(path) {
+        return path.substr(0, Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator)));
+    }
+    ts.getDirectoryPath = getDirectoryPath;
+    function isUrl(path) {
+        return path && !isRootedDiskPath(path) && path.indexOf("://") !== -1;
+    }
+    ts.isUrl = isUrl;
+    function isRootedDiskPath(path) {
+        return getRootLength(path) !== 0;
+    }
+    ts.isRootedDiskPath = isRootedDiskPath;
+    function normalizedPathComponents(path, rootLength) {
+        var normalizedParts = getNormalizedParts(path, rootLength);
+        return [path.substr(0, rootLength)].concat(normalizedParts);
+    }
+    function getNormalizedPathComponents(path, currentDirectory) {
+        path = normalizeSlashes(path);
+        var rootLength = getRootLength(path);
+        if (rootLength === 0) {
+            // If the path is not rooted it is relative to current directory
+            path = combinePaths(normalizeSlashes(currentDirectory), path);
+            rootLength = getRootLength(path);
+        }
+        return normalizedPathComponents(path, rootLength);
+    }
+    ts.getNormalizedPathComponents = getNormalizedPathComponents;
+    function getNormalizedAbsolutePath(fileName, currentDirectory) {
+        return getNormalizedPathFromPathComponents(getNormalizedPathComponents(fileName, currentDirectory));
+    }
+    ts.getNormalizedAbsolutePath = getNormalizedAbsolutePath;
+    function getNormalizedPathFromPathComponents(pathComponents) {
+        if (pathComponents && pathComponents.length) {
+            return pathComponents[0] + pathComponents.slice(1).join(ts.directorySeparator);
+        }
+    }
+    ts.getNormalizedPathFromPathComponents = getNormalizedPathFromPathComponents;
+    function getNormalizedPathComponentsOfUrl(url) {
+        // Get root length of http://www.website.com/folder1/folder2/
+        // In this example the root is:  http://www.website.com/
+        // normalized path components should be ["http://www.website.com/", "folder1", "folder2"]
+        var urlLength = url.length;
+        // Initial root length is http:// part
+        var rootLength = url.indexOf("://") + "://".length;
+        while (rootLength < urlLength) {
+            // Consume all immediate slashes in the protocol
+            // eg.initial rootlength is just file:// but it needs to consume another "/" in file:///
+            if (url.charCodeAt(rootLength) === 47 /* slash */) {
+                rootLength++;
+            }
+            else {
+                // non slash character means we continue proceeding to next component of root search
+                break;
+            }
+        }
+        // there are no parts after http:// just return current string as the pathComponent
+        if (rootLength === urlLength) {
+            return [url];
+        }
+        // Find the index of "/" after website.com so the root can be http://www.website.com/ (from existing http://)
+        var indexOfNextSlash = url.indexOf(ts.directorySeparator, rootLength);
+        if (indexOfNextSlash !== -1) {
+            // Found the "/" after the website.com so the root is length of http://www.website.com/
+            // and get components after the root normally like any other folder components
+            rootLength = indexOfNextSlash + 1;
+            return normalizedPathComponents(url, rootLength);
+        }
+        else {
+            // Can't find the host assume the rest of the string as component
+            // but make sure we append "/"  to it as root is not joined using "/"
+            // eg. if url passed in was http://website.com we want to use root as [http://website.com/]
+            // so that other path manipulations will be correct and it can be merged with relative paths correctly
+            return [url + ts.directorySeparator];
+        }
+    }
+    function getNormalizedPathOrUrlComponents(pathOrUrl, currentDirectory) {
+        if (isUrl(pathOrUrl)) {
+            return getNormalizedPathComponentsOfUrl(pathOrUrl);
+        }
+        else {
+            return getNormalizedPathComponents(pathOrUrl, currentDirectory);
+        }
+    }
+    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
+        var pathComponents = getNormalizedPathOrUrlComponents(relativeOrAbsolutePath, currentDirectory);
+        var directoryComponents = getNormalizedPathOrUrlComponents(directoryPathOrUrl, currentDirectory);
+        if (directoryComponents.length > 1 && lastOrUndefined(directoryComponents) === "") {
+            // If the directory path given was of type test/cases/ then we really need components of directory to be only till its name
+            // that is  ["test", "cases", ""] needs to be actually ["test", "cases"]
+            directoryComponents.length--;
+        }
+        // Find the component that differs
+        var joinStartIndex;
+        for (joinStartIndex = 0; joinStartIndex < pathComponents.length && joinStartIndex < directoryComponents.length; joinStartIndex++) {
+            if (getCanonicalFileName(directoryComponents[joinStartIndex]) !== getCanonicalFileName(pathComponents[joinStartIndex])) {
+                break;
+            }
+        }
+        // Get the relative path
+        if (joinStartIndex) {
+            var relativePath = "";
+            var relativePathComponents = pathComponents.slice(joinStartIndex, pathComponents.length);
+            for (; joinStartIndex < directoryComponents.length; joinStartIndex++) {
+                if (directoryComponents[joinStartIndex] !== "") {
+                    relativePath = relativePath + ".." + ts.directorySeparator;
+                }
+            }
+            return relativePath + relativePathComponents.join(ts.directorySeparator);
+        }
+        // Cant find the relative path, get the absolute path
+        var absolutePath = getNormalizedPathFromPathComponents(pathComponents);
+        if (isAbsolutePathAnUrl && isRootedDiskPath(absolutePath)) {
+            absolutePath = "file:///" + absolutePath;
+        }
+        return absolutePath;
+    }
+    ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
+    function getBaseFileName(path) {
+        if (path === undefined) {
+            return undefined;
+        }
+        var i = path.lastIndexOf(ts.directorySeparator);
+        return i < 0 ? path : path.substring(i + 1);
+    }
+    ts.getBaseFileName = getBaseFileName;
+    function combinePaths(path1, path2) {
+        if (!(path1 && path1.length))
+            return path2;
+        if (!(path2 && path2.length))
+            return path1;
+        if (getRootLength(path2) !== 0)
+            return path2;
+        if (path1.charAt(path1.length - 1) === ts.directorySeparator)
+            return path1 + path2;
+        return path1 + ts.directorySeparator + path2;
+    }
+    ts.combinePaths = combinePaths;
+    function fileExtensionIs(path, extension) {
+        var pathLen = path.length;
+        var extLen = extension.length;
+        return pathLen > extLen && path.substr(pathLen - extLen, extLen) === extension;
+    }
+    ts.fileExtensionIs = fileExtensionIs;
+    function ensureScriptKind(fileName, scriptKind) {
+        // Using scriptKind as a condition handles both:
+        // - 'scriptKind' is unspecified and thus it is `undefined`
+        // - 'scriptKind' is set and it is `Unknown` (0)
+        // If the 'scriptKind' is 'undefined' or 'Unknown' then we attempt
+        // to get the ScriptKind from the file name. If it cannot be resolved
+        // from the file name then the default 'TS' script kind is returned.
+        return (scriptKind || getScriptKindFromFileName(fileName)) || 3 /* TS */;
+    }
+    ts.ensureScriptKind = ensureScriptKind;
+    function getScriptKindFromFileName(fileName) {
+        var ext = fileName.substr(fileName.lastIndexOf("."));
+        switch (ext.toLowerCase()) {
+            case ".js":
+                return 1 /* JS */;
+            case ".jsx":
+                return 2 /* JSX */;
+            case ".ts":
+                return 3 /* TS */;
+            case ".tsx":
+                return 4 /* TSX */;
+            default:
+                return 0 /* Unknown */;
+        }
+    }
+    ts.getScriptKindFromFileName = getScriptKindFromFileName;
+    /**
+     *  List of supported extensions in order of file resolution precedence.
+     */
+    ts.supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
+    ts.supportedJavascriptExtensions = [".js", ".jsx"];
+    var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
+    function getSupportedExtensions(options) {
+        return options && options.allowJs ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
+    }
+    ts.getSupportedExtensions = getSupportedExtensions;
+    function isSupportedSourceFileName(fileName, compilerOptions) {
+        if (!fileName) {
+            return false;
+        }
+        for (var _i = 0, _a = getSupportedExtensions(compilerOptions); _i < _a.length; _i++) {
+            var extension = _a[_i];
+            if (fileExtensionIs(fileName, extension)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.isSupportedSourceFileName = isSupportedSourceFileName;
+    var extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
+    function removeFileExtension(path) {
+        for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
+            var ext = extensionsToRemove_1[_i];
+            var extensionless = tryRemoveExtension(path, ext);
+            if (extensionless !== undefined) {
+                return extensionless;
+            }
+        }
+        return path;
+    }
+    ts.removeFileExtension = removeFileExtension;
+    function tryRemoveExtension(path, extension) {
+        return fileExtensionIs(path, extension) ? path.substring(0, path.length - extension.length) : undefined;
+    }
+    ts.tryRemoveExtension = tryRemoveExtension;
+    function isJsxOrTsxExtension(ext) {
+        return ext === ".jsx" || ext === ".tsx";
+    }
+    ts.isJsxOrTsxExtension = isJsxOrTsxExtension;
+    function Symbol(flags, name) {
+        this.flags = flags;
+        this.name = name;
+        this.declarations = undefined;
+    }
+    function Type(checker, flags) {
+        this.flags = flags;
+    }
+    function Signature(checker) {
+    }
+    function Node(kind, pos, end) {
+        this.kind = kind;
+        this.pos = pos;
+        this.end = end;
+        this.flags = 0 /* None */;
+        this.parent = undefined;
+    }
+    ts.objectAllocator = {
+        getNodeConstructor: function () { return Node; },
+        getSourceFileConstructor: function () { return Node; },
+        getSymbolConstructor: function () { return Symbol; },
+        getTypeConstructor: function () { return Type; },
+        getSignatureConstructor: function () { return Signature; }
+    };
+    (function (AssertionLevel) {
+        AssertionLevel[AssertionLevel["None"] = 0] = "None";
+        AssertionLevel[AssertionLevel["Normal"] = 1] = "Normal";
+        AssertionLevel[AssertionLevel["Aggressive"] = 2] = "Aggressive";
+        AssertionLevel[AssertionLevel["VeryAggressive"] = 3] = "VeryAggressive";
+    })(ts.AssertionLevel || (ts.AssertionLevel = {}));
+    var AssertionLevel = ts.AssertionLevel;
+    var Debug;
+    (function (Debug) {
+        var currentAssertionLevel = 0 /* None */;
+        function shouldAssert(level) {
+            return currentAssertionLevel >= level;
+        }
+        Debug.shouldAssert = shouldAssert;
+        function assert(expression, message, verboseDebugInfo) {
+            if (!expression) {
+                var verboseDebugString = "";
+                if (verboseDebugInfo) {
+                    verboseDebugString = "\r\nVerbose Debug Information: " + verboseDebugInfo();
+                }
+                debugger;
+                throw new Error("Debug Failure. False expression: " + (message || "") + verboseDebugString);
+            }
+        }
+        Debug.assert = assert;
+        function fail(message) {
+            Debug.assert(/*expression*/ false, message);
+        }
+        Debug.fail = fail;
+    })(Debug = ts.Debug || (ts.Debug = {}));
+    function copyListRemovingItem(item, list) {
+        var copiedList = [];
+        for (var _i = 0, list_1 = list; _i < list_1.length; _i++) {
+            var e = list_1[_i];
+            if (e !== item) {
+                copiedList.push(e);
+            }
+        }
+        return copiedList;
+    }
+    ts.copyListRemovingItem = copyListRemovingItem;
+    function createGetCanonicalFileName(useCaseSensitivefileNames) {
+        return useCaseSensitivefileNames
+            ? (function (fileName) { return fileName; })
+            : (function (fileName) { return fileName.toLowerCase(); });
+    }
+    ts.createGetCanonicalFileName = createGetCanonicalFileName;
+})(ts || (ts = {}));
+/// <reference path="core.ts"/>
+var ts;
+(function (ts) {
+    ts.sys = (function () {
+        function getWScriptSystem() {
+            var fso = new ActiveXObject("Scripting.FileSystemObject");
+            var fileStream = new ActiveXObject("ADODB.Stream");
+            fileStream.Type = 2 /*text*/;
+            var binaryStream = new ActiveXObject("ADODB.Stream");
+            binaryStream.Type = 1 /*binary*/;
+            var args = [];
+            for (var i = 0; i < WScript.Arguments.length; i++) {
+                args[i] = WScript.Arguments.Item(i);
+            }
+            function readFile(fileName, encoding) {
+                if (!fso.FileExists(fileName)) {
+                    return undefined;
+                }
+                fileStream.Open();
+                try {
+                    if (encoding) {
+                        fileStream.Charset = encoding;
+                        fileStream.LoadFromFile(fileName);
+                    }
+                    else {
+                        // Load file and read the first two bytes into a string with no interpretation
+                        fileStream.Charset = "x-ansi";
+                        fileStream.LoadFromFile(fileName);
+                        var bom = fileStream.ReadText(2) || "";
+                        // Position must be at 0 before encoding can be changed
+                        fileStream.Position = 0;
+                        // [0xFF,0xFE] and [0xFE,0xFF] mean utf-16 (little or big endian), otherwise default to utf-8
+                        fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
+                    }
+                    // ReadText method always strips byte order mark from resulting string
+                    return fileStream.ReadText();
+                }
+                catch (e) {
+                    throw e;
+                }
+                finally {
+                    fileStream.Close();
+                }
+            }
+            function writeFile(fileName, data, writeByteOrderMark) {
+                fileStream.Open();
+                binaryStream.Open();
+                try {
+                    // Write characters in UTF-8 encoding
+                    fileStream.Charset = "utf-8";
+                    fileStream.WriteText(data);
+                    // If we don't want the BOM, then skip it by setting the starting location to 3 (size of BOM).
+                    // If not, start from position 0, as the BOM will be added automatically when charset==utf8.
+                    if (writeByteOrderMark) {
+                        fileStream.Position = 0;
+                    }
+                    else {
+                        fileStream.Position = 3;
+                    }
+                    fileStream.CopyTo(binaryStream);
+                    binaryStream.SaveToFile(fileName, 2 /*overwrite*/);
+                }
+                finally {
+                    binaryStream.Close();
+                    fileStream.Close();
+                }
+            }
+            function getCanonicalPath(path) {
+                return path.toLowerCase();
+            }
+            function getNames(collection) {
+                var result = [];
+                for (var e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
+                    result.push(e.item().Name);
+                }
+                return result.sort();
+            }
+            function getDirectories(path) {
+                var folder = fso.GetFolder(path);
+                return getNames(folder.subfolders);
+            }
+            function readDirectory(path, extension, exclude) {
+                var result = [];
+                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
+                visitDirectory(path);
+                return result;
+                function visitDirectory(path) {
+                    var folder = fso.GetFolder(path || ".");
+                    var files = getNames(folder.files);
+                    for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
+                        var current = files_1[_i];
+                        var name_1 = ts.combinePaths(path, current);
+                        if ((!extension || ts.fileExtensionIs(name_1, extension)) && !ts.contains(exclude, getCanonicalPath(name_1))) {
+                            result.push(name_1);
+                        }
+                    }
+                    var subfolders = getNames(folder.subfolders);
+                    for (var _a = 0, subfolders_1 = subfolders; _a < subfolders_1.length; _a++) {
+                        var current = subfolders_1[_a];
+                        var name_2 = ts.combinePaths(path, current);
+                        if (!ts.contains(exclude, getCanonicalPath(name_2))) {
+                            visitDirectory(name_2);
+                        }
+                    }
+                }
+            }
+            return {
+                args: args,
+                newLine: "\r\n",
+                useCaseSensitiveFileNames: false,
+                write: function (s) {
+                    WScript.StdOut.Write(s);
+                },
+                readFile: readFile,
+                writeFile: writeFile,
+                resolvePath: function (path) {
+                    return fso.GetAbsolutePathName(path);
+                },
+                fileExists: function (path) {
+                    return fso.FileExists(path);
+                },
+                directoryExists: function (path) {
+                    return fso.FolderExists(path);
+                },
+                createDirectory: function (directoryName) {
+                    if (!this.directoryExists(directoryName)) {
+                        fso.CreateFolder(directoryName);
+                    }
+                },
+                getExecutingFilePath: function () {
+                    return WScript.ScriptFullName;
+                },
+                getCurrentDirectory: function () {
+                    return new ActiveXObject("WScript.Shell").CurrentDirectory;
+                },
+                getDirectories: getDirectories,
+                readDirectory: readDirectory,
+                exit: function (exitCode) {
+                    try {
+                        WScript.Quit(exitCode);
+                    }
+                    catch (e) {
+                    }
+                }
+            };
+        }
+        function getNodeSystem() {
+            var _fs = require("fs");
+            var _path = require("path");
+            var _os = require("os");
+            var _crypto = require("crypto");
+            var useNonPollingWatchers = process.env["TSC_NONPOLLING_WATCHER"];
+            function createWatchedFileSet() {
+                var dirWatchers = {};
+                // One file can have multiple watchers
+                var fileWatcherCallbacks = {};
+                return { addFile: addFile, removeFile: removeFile };
+                function reduceDirWatcherRefCountForFile(fileName) {
+                    var dirName = ts.getDirectoryPath(fileName);
+                    if (ts.hasProperty(dirWatchers, dirName)) {
+                        var watcher = dirWatchers[dirName];
+                        watcher.referenceCount -= 1;
+                        if (watcher.referenceCount <= 0) {
+                            watcher.close();
+                            delete dirWatchers[dirName];
+                        }
+                    }
+                }
+                function addDirWatcher(dirPath) {
+                    if (ts.hasProperty(dirWatchers, dirPath)) {
+                        var watcher_1 = dirWatchers[dirPath];
+                        watcher_1.referenceCount += 1;
+                        return;
+                    }
+                    var watcher = _fs.watch(dirPath, { persistent: true }, function (eventName, relativeFileName) { return fileEventHandler(eventName, relativeFileName, dirPath); });
+                    watcher.referenceCount = 1;
+                    dirWatchers[dirPath] = watcher;
+                    return;
+                }
+                function addFileWatcherCallback(filePath, callback) {
+                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
+                        fileWatcherCallbacks[filePath].push(callback);
+                    }
+                    else {
+                        fileWatcherCallbacks[filePath] = [callback];
+                    }
+                }
+                function addFile(fileName, callback) {
+                    addFileWatcherCallback(fileName, callback);
+                    addDirWatcher(ts.getDirectoryPath(fileName));
+                    return { fileName: fileName, callback: callback };
+                }
+                function removeFile(watchedFile) {
+                    removeFileWatcherCallback(watchedFile.fileName, watchedFile.callback);
+                    reduceDirWatcherRefCountForFile(watchedFile.fileName);
+                }
+                function removeFileWatcherCallback(filePath, callback) {
+                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
+                        var newCallbacks = ts.copyListRemovingItem(callback, fileWatcherCallbacks[filePath]);
+                        if (newCallbacks.length === 0) {
+                            delete fileWatcherCallbacks[filePath];
+                        }
+                        else {
+                            fileWatcherCallbacks[filePath] = newCallbacks;
+                        }
+                    }
+                }
+                function fileEventHandler(eventName, relativeFileName, baseDirPath) {
+                    // When files are deleted from disk, the triggered "rename" event would have a relativefileName of "undefined"
+                    var fileName = typeof relativeFileName !== "string"
+                        ? undefined
+                        : ts.getNormalizedAbsolutePath(relativeFileName, baseDirPath);
+                    // Some applications save a working file via rename operations
+                    if ((eventName === "change" || eventName === "rename") && ts.hasProperty(fileWatcherCallbacks, fileName)) {
+                        for (var _i = 0, _a = fileWatcherCallbacks[fileName]; _i < _a.length; _i++) {
+                            var fileCallback = _a[_i];
+                            fileCallback(fileName);
+                        }
+                    }
+                }
+            }
+            var watchedFileSet = createWatchedFileSet();
+            function isNode4OrLater() {
+                return parseInt(process.version.charAt(1)) >= 4;
+            }
+            var platform = _os.platform();
+            // win32\win64 are case insensitive platforms, MacOS (darwin) by default is also case insensitive
+            var useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
+            function readFile(fileName, encoding) {
+                if (!fileExists(fileName)) {
+                    return undefined;
+                }
+                var buffer = _fs.readFileSync(fileName);
+                var len = buffer.length;
+                if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
+                    // Big endian UTF-16 byte order mark detected. Since big endian is not supported by node.js,
+                    // flip all byte pairs and treat as little endian.
+                    len &= ~1;
+                    for (var i = 0; i < len; i += 2) {
+                        var temp = buffer[i];
+                        buffer[i] = buffer[i + 1];
+                        buffer[i + 1] = temp;
+                    }
+                    return buffer.toString("utf16le", 2);
+                }
+                if (len >= 2 && buffer[0] === 0xFF && buffer[1] === 0xFE) {
+                    // Little endian UTF-16 byte order mark detected
+                    return buffer.toString("utf16le", 2);
+                }
+                if (len >= 3 && buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
+                    // UTF-8 byte order mark detected
+                    return buffer.toString("utf8", 3);
+                }
+                // Default is UTF-8 with no byte order mark
+                return buffer.toString("utf8");
+            }
+            function writeFile(fileName, data, writeByteOrderMark) {
+                // If a BOM is required, emit one
+                if (writeByteOrderMark) {
+                    data = "\uFEFF" + data;
+                }
+                var fd;
+                try {
+                    fd = _fs.openSync(fileName, "w");
+                    _fs.writeSync(fd, data, undefined, "utf8");
+                }
+                finally {
+                    if (fd !== undefined) {
+                        _fs.closeSync(fd);
+                    }
+                }
+            }
+            function getCanonicalPath(path) {
+                return useCaseSensitiveFileNames ? path : path.toLowerCase();
+            }
+            var FileSystemEntryKind;
+            (function (FileSystemEntryKind) {
+                FileSystemEntryKind[FileSystemEntryKind["File"] = 0] = "File";
+                FileSystemEntryKind[FileSystemEntryKind["Directory"] = 1] = "Directory";
+            })(FileSystemEntryKind || (FileSystemEntryKind = {}));
+            function fileSystemEntryExists(path, entryKind) {
+                try {
+                    var stat = _fs.statSync(path);
+                    switch (entryKind) {
+                        case 0 /* File */: return stat.isFile();
+                        case 1 /* Directory */: return stat.isDirectory();
+                    }
+                }
+                catch (e) {
+                    return false;
+                }
+            }
+            function fileExists(path) {
+                return fileSystemEntryExists(path, 0 /* File */);
+            }
+            function directoryExists(path) {
+                return fileSystemEntryExists(path, 1 /* Directory */);
+            }
+            function getDirectories(path) {
+                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1 /* Directory */); });
+            }
+            function readDirectory(path, extension, exclude) {
+                var result = [];
+                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
+                visitDirectory(path);
+                return result;
+                function visitDirectory(path) {
+                    var files = _fs.readdirSync(path || ".").sort();
+                    var directories = [];
+                    for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
+                        var current = files_2[_i];
+                        // This is necessary because on some file system node fails to exclude
+                        // "." and "..". See https://github.com/nodejs/node/issues/4002
+                        if (current === "." || current === "..") {
+                            continue;
+                        }
+                        var name_3 = ts.combinePaths(path, current);
+                        if (!ts.contains(exclude, getCanonicalPath(name_3))) {
+                            var stat = _fs.statSync(name_3);
+                            if (stat.isFile()) {
+                                if (!extension || ts.fileExtensionIs(name_3, extension)) {
+                                    result.push(name_3);
+                                }
+                            }
+                            else if (stat.isDirectory()) {
+                                directories.push(name_3);
+                            }
+                        }
+                    }
+                    for (var _a = 0, directories_1 = directories; _a < directories_1.length; _a++) {
+                        var current = directories_1[_a];
+                        visitDirectory(current);
+                    }
+                }
+            }
+            return {
+                args: process.argv.slice(2),
+                newLine: _os.EOL,
+                useCaseSensitiveFileNames: useCaseSensitiveFileNames,
+                write: function (s) {
+                    process.stdout.write(s);
+                },
+                readFile: readFile,
+                writeFile: writeFile,
+                watchFile: function (fileName, callback) {
+                    if (useNonPollingWatchers) {
+                        var watchedFile_1 = watchedFileSet.addFile(fileName, callback);
+                        return {
+                            close: function () { return watchedFileSet.removeFile(watchedFile_1); }
+                        };
+                    }
+                    else {
+                        _fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
+                        return {
+                            close: function () { return _fs.unwatchFile(fileName, fileChanged); }
+                        };
+                    }
+                    function fileChanged(curr, prev) {
+                        if (+curr.mtime <= +prev.mtime) {
+                            return;
+                        }
+                        callback(fileName);
+                    }
+                },
+                watchDirectory: function (directoryName, callback, recursive) {
+                    // Node 4.0 `fs.watch` function supports the "recursive" option on both OSX and Windows
+                    // (ref: https://github.com/nodejs/node/pull/2649 and https://github.com/Microsoft/TypeScript/issues/4643)
+                    var options;
+                    if (isNode4OrLater() && (process.platform === "win32" || process.platform === "darwin")) {
+                        options = { persistent: true, recursive: !!recursive };
+                    }
+                    else {
+                        options = { persistent: true };
+                    }
+                    return _fs.watch(directoryName, options, function (eventName, relativeFileName) {
+                        // In watchDirectory we only care about adding and removing files (when event name is
+                        // "rename"); changes made within files are handled by corresponding fileWatchers (when
+                        // event name is "change")
+                        if (eventName === "rename") {
+                            // When deleting a file, the passed baseFileName is null
+                            callback(!relativeFileName ? relativeFileName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
+                        }
+                        ;
+                    });
+                },
+                resolvePath: function (path) {
+                    return _path.resolve(path);
+                },
+                fileExists: fileExists,
+                directoryExists: directoryExists,
+                createDirectory: function (directoryName) {
+                    if (!this.directoryExists(directoryName)) {
+                        _fs.mkdirSync(directoryName);
+                    }
+                },
+                getExecutingFilePath: function () {
+                    return __filename;
+                },
+                getCurrentDirectory: function () {
+                    return process.cwd();
+                },
+                getDirectories: getDirectories,
+                readDirectory: readDirectory,
+                getModifiedTime: function (path) {
+                    try {
+                        return _fs.statSync(path).mtime;
+                    }
+                    catch (e) {
+                        return undefined;
+                    }
+                },
+                createHash: function (data) {
+                    var hash = _crypto.createHash("md5");
+                    hash.update(data);
+                    return hash.digest("hex");
+                },
+                getMemoryUsage: function () {
+                    if (global.gc) {
+                        global.gc();
+                    }
+                    return process.memoryUsage().heapUsed;
+                },
+                exit: function (exitCode) {
+                    process.exit(exitCode);
+                },
+                realpath: function (path) {
+                    return _fs.realpathSync(path);
+                }
+            };
+        }
+        function getChakraSystem() {
+            var realpath = ChakraHost.realpath && (function (path) { return ChakraHost.realpath(path); });
+            return {
+                newLine: ChakraHost.newLine || "\r\n",
+                args: ChakraHost.args,
+                useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
+                write: ChakraHost.echo,
+                readFile: function (path, encoding) {
+                    // encoding is automatically handled by the implementation in ChakraHost
+                    return ChakraHost.readFile(path);
+                },
+                writeFile: function (path, data, writeByteOrderMark) {
+                    // If a BOM is required, emit one
+                    if (writeByteOrderMark) {
+                        data = "\uFEFF" + data;
+                    }
+                    ChakraHost.writeFile(path, data);
+                },
+                resolvePath: ChakraHost.resolvePath,
+                fileExists: ChakraHost.fileExists,
+                directoryExists: ChakraHost.directoryExists,
+                createDirectory: ChakraHost.createDirectory,
+                getExecutingFilePath: function () { return ChakraHost.executingFile; },
+                getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
+                getDirectories: ChakraHost.getDirectories,
+                readDirectory: ChakraHost.readDirectory,
+                exit: ChakraHost.quit,
+                realpath: realpath
+            };
+        }
+        if (typeof ChakraHost !== "undefined") {
+            return getChakraSystem();
+        }
+        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
+            return getWScriptSystem();
+        }
+        else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
+            // process and process.nextTick checks if current environment is node-like
+            // process.browser check excludes webpack and browserify
+            return getNodeSystem();
+        }
+        else {
+            return undefined; // Unsupported host
+        }
+    })();
+})(ts || (ts = {}));
+// <auto-generated />
+/// <reference path="types.ts" />
+/* @internal */
+var ts;
+(function (ts) {
+    ts.Diagnostics = {
+        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
+        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
+        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
+        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
+        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
+        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
+        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
+        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
+        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
+        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
+        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
+        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
+        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
+        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
+        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
+        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
+        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
+        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
+        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
+        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
+        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
+        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
+        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
+        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
+        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
+        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
+        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
+        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
+        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
+        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
+        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
+        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
+        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
+        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
+        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
+        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
+        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
+        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
+        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
+        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
+        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
+        Type_0_is_not_a_valid_async_function_return_type: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_1055", message: "Type '{0}' is not a valid async function return type." },
+        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
+        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
+        Operand_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "Operand_for_await_does_not_have_a_valid_callable_then_member_1058", message: "Operand for 'await' does not have a valid callable 'then' member." },
+        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: { code: 1059, category: ts.DiagnosticCategory.Error, key: "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059", message: "Return expression in async function does not have a valid callable 'then' member." },
+        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: { code: 1060, category: ts.DiagnosticCategory.Error, key: "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060", message: "Expression body for async arrow function does not have a valid callable 'then' member." },
+        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
+        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
+        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
+        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
+        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
+        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
+        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
+        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
+        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
+        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
+        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher." },
+        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
+        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
+        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
+        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
+        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
+        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
+        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
+        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
+        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
+        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
+        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
+        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
+        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
+        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
+        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
+        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
+        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
+        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
+        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
+        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
+        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
+        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'" },
+        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
+        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
+        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
+        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
+        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
+        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
+        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
+        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
+        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
+        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
+        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
+        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
+        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
+        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
+        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
+        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
+        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
+        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
+        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
+        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
+        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
+        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
+        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
+        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
+        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
+        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
+        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
+        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
+        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
+        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
+        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
+        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
+        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
+        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
+        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
+        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
+        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
+        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
+        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
+        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
+        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
+        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
+        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
+        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
+        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
+        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
+        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
+        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
+        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
+        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
+        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
+        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
+        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
+        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
+        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
+        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
+        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
+        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
+        A_parameter_property_may_not_be_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_a_binding_pattern_1187", message: "A parameter property may not be a binding pattern." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
+        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
+        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
+        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
+        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
+        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
+        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
+        Catch_clause_variable_name_must_be_an_identifier: { code: 1195, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_name_must_be_an_identifier_1195", message: "Catch clause variable name must be an identifier." },
+        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
+        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
+        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
+        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
+        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asteri_1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_defaul_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
+        Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
+        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
+        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
+        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
+        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
+        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
+        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name" },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode" },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
+        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
+        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
+        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
+        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
+        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
+        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
+        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
+        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
+        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
+        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
+        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
+        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
+        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
+        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
+        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
+        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
+        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
+        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
+        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
+        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
+        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
+        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
+        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
+        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
+        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
+        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
+        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
+        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
+        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
+        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
+        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
+        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
+        _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: { code: 1253, category: ts.DiagnosticCategory.Error, key: "_0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag_1253", message: "'{0}' tag cannot be used independently as a top level JSDoc tag." },
+        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
+        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
+        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
+        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
+        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
+        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
+        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
+        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
+        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
+        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
+        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
+        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
+        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
+        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
+        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
+        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
+        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
+        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
+        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
+        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
+        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
+        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
+        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
+        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
+        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
+        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
+        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
+        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
+        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
+        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
+        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
+        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
+        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
+        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
+        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
+        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
+        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
+        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
+        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
+        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
+        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
+        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
+        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
+        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
+        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
+        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
+        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
+        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
+        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
+        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
+        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
+        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
+        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
+        Supplied_parameters_do_not_match_any_signature_of_call_target: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Supplied_parameters_do_not_match_any_signature_of_call_target_2346", message: "Supplied parameters do not match any signature of call target." },
+        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
+        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
+        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_2349", message: "Cannot invoke an expression whose type lacks a call signature." },
+        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
+        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
+        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
+        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
+        No_best_common_type_exists_among_return_expressions: { code: 2354, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_return_expressions_2354", message: "No best common type exists among return expressions." },
+        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
+        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
+        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357", message: "The operand of an increment or decrement operator must be a variable, property or indexer." },
+        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
+        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
+        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
+        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter" },
+        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_of_assignment_expression_2364", message: "Invalid left-hand side of assignment expression." },
+        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
+        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
+        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'" },
+        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
+        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
+        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
+        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
+        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
+        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
+        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
+        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
+        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
+        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
+        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
+        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
+        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
+        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
+        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
+        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
+        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
+        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
+        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
+        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
+        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
+        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
+        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
+        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
+        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
+        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
+        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
+        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
+        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
+        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
+        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
+        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
+        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
+        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
+        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
+        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
+        Invalid_left_hand_side_in_for_in_statement: { code: 2406, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_in_statement_2406", message: "Invalid left-hand side in 'for...in' statement." },
+        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
+        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
+        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class" },
+        All_symbols_within_a_with_block_will_be_resolved_to_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "All_symbols_within_a_with_block_will_be_resolved_to_any_2410", message: "All symbols within a 'with' block will be resolved to 'any'." },
+        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
+        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
+        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
+        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'" },
+        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
+        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
+        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
+        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
+        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
+        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
+        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'" },
+        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
+        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
+        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'" },
+        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
+        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged" },
+        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged" },
+        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
+        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
+        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name" },
+        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'" },
+        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
+        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'" },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
+        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
+        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
+        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
+        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
+        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
+        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
+        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
+        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: { code: 2449, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449", message: "The operand of an increment or decrement operator cannot be a constant or a read-only property." },
+        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450", message: "Left-hand side of assignment expression cannot be a constant or a read-only property." },
+        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
+        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
+        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
+        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
+        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
+        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
+        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'" },
+        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
+        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
+        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
+        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
+        A_rest_element_must_be_last_in_an_array_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462", message: "A rest element must be last in an array destructuring pattern" },
+        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
+        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
+        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
+        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
+        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
+        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
+        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
+        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
+        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
+        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
+        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
+        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
+        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
+        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
+        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
+        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
+        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
+        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
+        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
+        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
+        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'" },
+        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2485, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485", message: "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property." },
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2486, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486", message: "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property." },
+        Invalid_left_hand_side_in_for_of_statement: { code: 2487, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_of_statement_2487", message: "Invalid left-hand side in 'for...of' statement." },
+        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
+        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
+        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
+        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause" },
+        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
+        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
+        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
+        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
+        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
+        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
+        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
+        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
+        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
+        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
+        No_best_common_type_exists_among_yield_expressions: { code: 2504, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_yield_expressions_2504", message: "No best common type exists among yield expressions." },
+        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
+        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
+        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
+        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
+        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
+        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
+        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
+        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
+        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
+        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
+        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
+        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
+        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
+        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
+        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
+        The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_function_expression: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_2522", message: "The 'arguments' object cannot be referenced in an async arrow function. Consider using a standard async function expression." },
+        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
+        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
+        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
+        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
+        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
+        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
+        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
+        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
+        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
+        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
+        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
+        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
+        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
+        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
+        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'" },
+        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
+        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
+        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
+        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property" },
+        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property" },
+        Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: ts.DiagnosticCategory.Error, key: "Cannot_emit_namespaced_JSX_elements_in_React_2650", message: "Cannot emit namespaced JSX elements in React" },
+        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
+        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
+        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
+        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
+        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
+        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element" },
+        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'" },
+        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
+        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
+        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
+        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
+        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
+        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
+        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
+        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
+        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
+        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
+        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
+        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
+        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
+        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
+        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
+        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
+        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
+        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
+        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
+        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: { code: 2679, category: ts.DiagnosticCategory.Error, key: "A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void_2679", message: "A function that is called with the 'new' keyword cannot have a 'this' type that is 'void'." },
+        A_this_parameter_must_be_the_first_parameter: { code: 2680, category: ts.DiagnosticCategory.Error, key: "A_this_parameter_must_be_the_first_parameter_2680", message: "A 'this' parameter must be the first parameter." },
+        A_constructor_cannot_have_a_this_parameter: { code: 2681, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_have_a_this_parameter_2681", message: "A constructor cannot have a 'this' parameter." },
+        get_and_set_accessor_must_have_the_same_this_type: { code: 2682, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_this_type_2682", message: "'get' and 'set' accessor must have the same 'this' type." },
+        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
+        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
+        The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
+        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
+        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
+        Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
+        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4006, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4006", message: "Type parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4008, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4008", message: "Type parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4010, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4010", message: "Type parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4012, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4012", message: "Type parameter '{0}' of public method from exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4014, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", message: "Type parameter '{0}' of method from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4016, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", message: "Type parameter '{0}' of exported function has or is using private name '{1}'." },
+        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4019, category: ts.DiagnosticCategory.Error, key: "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", message: "Implements clause of exported class '{0}' has or is using private name '{1}'." },
+        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
+        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "Extends clause of exported interface '{0}' has or is using private name '{1}'." },
+        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4023, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", message: "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named." },
+        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: { code: 4024, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", message: "Exported variable '{0}' has or is using name '{1}' from private module '{2}'." },
+        Exported_variable_0_has_or_is_using_private_name_1: { code: 4025, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_private_name_1_4025", message: "Exported variable '{0}' has or is using private name '{1}'." },
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4026, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026", message: "Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4027, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4027", message: "Public static property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
+        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4028, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_private_name_1_4028", message: "Public static property '{0}' of exported class has or is using private name '{1}'." },
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4029, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029", message: "Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4030, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4030", message: "Public property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
+        Public_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4031, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_private_name_1_4031", message: "Public property '{0}' of exported class has or is using private name '{1}'." },
+        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4032, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4032", message: "Property '{0}' of exported interface has or is using name '{1}' from private module '{2}'." },
+        Property_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4033, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_private_name_1_4033", message: "Property '{0}' of exported interface has or is using private name '{1}'." },
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4034, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_4034", message: "Parameter '{0}' of public static property setter from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4035, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1_4035", message: "Parameter '{0}' of public static property setter from exported class has or is using private name '{1}'." },
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4036, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_4036", message: "Parameter '{0}' of public property setter from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4037, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1_4037", message: "Parameter '{0}' of public property setter from exported class has or is using private name '{1}'." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4038, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_externa_4038", message: "Return type of public static property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4039, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_4039", message: "Return type of public static property getter from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4040, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0_4040", message: "Return type of public static property getter from exported class has or is using private name '{0}'." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4041, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_modul_4041", message: "Return type of public property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4042, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_4042", message: "Return type of public property getter from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4043, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0_4043", message: "Return type of public property getter from exported class has or is using private name '{0}'." },
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4044, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_mod_4044", message: "Return type of constructor signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4045, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0_4045", message: "Return type of constructor signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4046, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4046", message: "Return type of call signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4047, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0_4047", message: "Return type of call signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4048, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4048", message: "Return type of index signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4049, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0_4049", message: "Return type of index signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4050, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module__4050", message: "Return type of public static method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4051, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4051", message: "Return type of public static method from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: { code: 4052, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0_4052", message: "Return type of public static method from exported class has or is using private name '{0}'." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4053, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_c_4053", message: "Return type of public method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4054, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4054", message: "Return type of public method from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: { code: 4055, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0_4055", message: "Return type of public method from exported class has or is using private name '{0}'." },
+        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4056, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4056", message: "Return type of method from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: { code: 4057, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0_4057", message: "Return type of method from exported interface has or is using private name '{0}'." },
+        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4058, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named_4058", message: "Return type of exported function has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: { code: 4059, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1_4059", message: "Return type of exported function has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_exported_function_has_or_is_using_private_name_0: { code: 4060, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_private_name_0_4060", message: "Return type of exported function has or is using private name '{0}'." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4061, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_can_4061", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4062, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2_4062", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: { code: 4063, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1_4063", message: "Parameter '{0}' of constructor from exported class has or is using private name '{1}'." },
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4064, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_mod_4064", message: "Parameter '{0}' of constructor signature from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4065, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4065", message: "Parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4066, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4066", message: "Parameter '{0}' of call signature from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4067, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4067", message: "Parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4068, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module__4068", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4069, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4069", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4070, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4070", message: "Parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4071, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_c_4071", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4072, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4072", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4073, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4073", message: "Parameter '{0}' of public method from exported class has or is using private name '{1}'." },
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4074, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4074", message: "Parameter '{0}' of method from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4075, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4075", message: "Parameter '{0}' of method from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4076, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4076", message: "Parameter '{0}' of exported function has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: { code: 4077, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2_4077", message: "Parameter '{0}' of exported function has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4078, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", message: "Parameter '{0}' of exported function has or is using private name '{1}'." },
+        Exported_type_alias_0_has_or_is_using_private_name_1: { code: 4081, category: ts.DiagnosticCategory.Error, key: "Exported_type_alias_0_has_or_is_using_private_name_1_4081", message: "Exported type alias '{0}' has or is using private name '{1}'." },
+        Default_export_of_the_module_has_or_is_using_private_name_0: { code: 4082, category: ts.DiagnosticCategory.Error, key: "Default_export_of_the_module_has_or_is_using_private_name_0_4082", message: "Default export of the module has or is using private name '{0}'." },
+        Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict: { code: 4090, category: ts.DiagnosticCategory.Message, key: "Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_t_4090", message: "Conflicting library definitions for '{0}' found at '{1}' and '{2}'. Copy the correct file to the 'typings' folder to resolve this conflict." },
+        The_current_host_does_not_support_the_0_option: { code: 5001, category: ts.DiagnosticCategory.Error, key: "The_current_host_does_not_support_the_0_option_5001", message: "The current host does not support the '{0}' option." },
+        Cannot_find_the_common_subdirectory_path_for_the_input_files: { code: 5009, category: ts.DiagnosticCategory.Error, key: "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", message: "Cannot find the common subdirectory path for the input files." },
+        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}" },
+        Unsupported_file_encoding: { code: 5013, category: ts.DiagnosticCategory.Error, key: "Unsupported_file_encoding_5013", message: "Unsupported file encoding." },
+        Failed_to_parse_file_0_Colon_1: { code: 5014, category: ts.DiagnosticCategory.Error, key: "Failed_to_parse_file_0_Colon_1_5014", message: "Failed to parse file '{0}': {1}." },
+        Unknown_compiler_option_0: { code: 5023, category: ts.DiagnosticCategory.Error, key: "Unknown_compiler_option_0_5023", message: "Unknown compiler option '{0}'." },
+        Compiler_option_0_requires_a_value_of_type_1: { code: 5024, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_requires_a_value_of_type_1_5024", message: "Compiler option '{0}' requires a value of type {1}." },
+        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}" },
+        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: { code: 5042, category: ts.DiagnosticCategory.Error, key: "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", message: "Option 'project' cannot be mixed with source files on a command line." },
+        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: { code: 5047, category: ts.DiagnosticCategory.Error, key: "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", message: "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher." },
+        Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: { code: 5051, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided_5051", message: "Option '{0} can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided." },
+        Option_0_cannot_be_specified_without_specifying_option_1: { code: 5052, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_without_specifying_option_1_5052", message: "Option '{0}' cannot be specified without specifying option '{1}'." },
+        Option_0_cannot_be_specified_with_option_1: { code: 5053, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_with_option_1_5053", message: "Option '{0}' cannot be specified with option '{1}'." },
+        A_tsconfig_json_file_is_already_defined_at_Colon_0: { code: 5054, category: ts.DiagnosticCategory.Error, key: "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", message: "A 'tsconfig.json' file is already defined at: '{0}'." },
+        Cannot_write_file_0_because_it_would_overwrite_input_file: { code: 5055, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", message: "Cannot write file '{0}' because it would overwrite input file." },
+        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: { code: 5056, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", message: "Cannot write file '{0}' because it would be overwritten by multiple input files." },
+        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'" },
+        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'" },
+        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: { code: 5059, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", message: "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier." },
+        Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
+        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
+        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
+        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
+        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
+        Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
+        Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
+        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: { code: 6003, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", message: "Specify the location where debugger should locate map files instead of generated locations." },
+        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: { code: 6004, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations_6004", message: "Specify the location where debugger should locate TypeScript files instead of source locations." },
+        Watch_input_files: { code: 6005, category: ts.DiagnosticCategory.Message, key: "Watch_input_files_6005", message: "Watch input files." },
+        Redirect_output_structure_to_the_directory: { code: 6006, category: ts.DiagnosticCategory.Message, key: "Redirect_output_structure_to_the_directory_6006", message: "Redirect output structure to the directory." },
+        Do_not_erase_const_enum_declarations_in_generated_code: { code: 6007, category: ts.DiagnosticCategory.Message, key: "Do_not_erase_const_enum_declarations_in_generated_code_6007", message: "Do not erase const enum declarations in generated code." },
+        Do_not_emit_outputs_if_any_errors_were_reported: { code: 6008, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_if_any_errors_were_reported_6008", message: "Do not emit outputs if any errors were reported." },
+        Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
+        Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
+        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
+        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
+        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
+        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
+        Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
+        Print_the_compiler_s_version: { code: 6019, category: ts.DiagnosticCategory.Message, key: "Print_the_compiler_s_version_6019", message: "Print the compiler's version." },
+        Compile_the_project_in_the_given_directory: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_in_the_given_directory_6020", message: "Compile the project in the given directory." },
+        Syntax_Colon_0: { code: 6023, category: ts.DiagnosticCategory.Message, key: "Syntax_Colon_0_6023", message: "Syntax: {0}" },
+        options: { code: 6024, category: ts.DiagnosticCategory.Message, key: "options_6024", message: "options" },
+        file: { code: 6025, category: ts.DiagnosticCategory.Message, key: "file_6025", message: "file" },
+        Examples_Colon_0: { code: 6026, category: ts.DiagnosticCategory.Message, key: "Examples_Colon_0_6026", message: "Examples: {0}" },
+        Options_Colon: { code: 6027, category: ts.DiagnosticCategory.Message, key: "Options_Colon_6027", message: "Options:" },
+        Version_0: { code: 6029, category: ts.DiagnosticCategory.Message, key: "Version_0_6029", message: "Version {0}" },
+        Insert_command_line_options_and_files_from_a_file: { code: 6030, category: ts.DiagnosticCategory.Message, key: "Insert_command_line_options_and_files_from_a_file_6030", message: "Insert command line options and files from a file." },
+        File_change_detected_Starting_incremental_compilation: { code: 6032, category: ts.DiagnosticCategory.Message, key: "File_change_detected_Starting_incremental_compilation_6032", message: "File change detected. Starting incremental compilation..." },
+        KIND: { code: 6034, category: ts.DiagnosticCategory.Message, key: "KIND_6034", message: "KIND" },
+        FILE: { code: 6035, category: ts.DiagnosticCategory.Message, key: "FILE_6035", message: "FILE" },
+        VERSION: { code: 6036, category: ts.DiagnosticCategory.Message, key: "VERSION_6036", message: "VERSION" },
+        LOCATION: { code: 6037, category: ts.DiagnosticCategory.Message, key: "LOCATION_6037", message: "LOCATION" },
+        DIRECTORY: { code: 6038, category: ts.DiagnosticCategory.Message, key: "DIRECTORY_6038", message: "DIRECTORY" },
+        Compilation_complete_Watching_for_file_changes: { code: 6042, category: ts.DiagnosticCategory.Message, key: "Compilation_complete_Watching_for_file_changes_6042", message: "Compilation complete. Watching for file changes." },
+        Generates_corresponding_map_file: { code: 6043, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_map_file_6043", message: "Generates corresponding '.map' file." },
+        Compiler_option_0_expects_an_argument: { code: 6044, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_expects_an_argument_6044", message: "Compiler option '{0}' expects an argument." },
+        Unterminated_quoted_string_in_response_file_0: { code: 6045, category: ts.DiagnosticCategory.Error, key: "Unterminated_quoted_string_in_response_file_0_6045", message: "Unterminated quoted string in response file '{0}'." },
+        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}" },
+        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: { code: 6048, category: ts.DiagnosticCategory.Error, key: "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", message: "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'." },
+        Unsupported_locale_0: { code: 6049, category: ts.DiagnosticCategory.Error, key: "Unsupported_locale_0_6049", message: "Unsupported locale '{0}'." },
+        Unable_to_open_file_0: { code: 6050, category: ts.DiagnosticCategory.Error, key: "Unable_to_open_file_0_6050", message: "Unable to open file '{0}'." },
+        Corrupted_locale_file_0: { code: 6051, category: ts.DiagnosticCategory.Error, key: "Corrupted_locale_file_0_6051", message: "Corrupted locale file {0}." },
+        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: { code: 6052, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_expressions_and_declarations_with_an_implied_any_type_6052", message: "Raise error on expressions and declarations with an implied 'any' type." },
+        File_0_not_found: { code: 6053, category: ts.DiagnosticCategory.Error, key: "File_0_not_found_6053", message: "File '{0}' not found." },
+        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: { code: 6054, category: ts.DiagnosticCategory.Error, key: "File_0_has_unsupported_extension_The_only_supported_extensions_are_1_6054", message: "File '{0}' has unsupported extension. The only supported extensions are {1}." },
+        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: { code: 6055, category: ts.DiagnosticCategory.Message, key: "Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures_6055", message: "Suppress noImplicitAny errors for indexing objects lacking index signatures." },
+        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: { code: 6056, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_declarations_for_code_that_has_an_internal_annotation_6056", message: "Do not emit declarations for code that has an '@internal' annotation." },
+        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: { code: 6058, category: ts.DiagnosticCategory.Message, key: "Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir_6058", message: "Specify the root directory of input files. Use to control the output directory structure with --outDir." },
+        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: { code: 6059, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files_6059", message: "File '{0}' is not under 'rootDir' '{1}'. 'rootDir' is expected to contain all source files." },
+        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: { code: 6060, category: ts.DiagnosticCategory.Message, key: "Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix_6060", message: "Specify the end of line sequence to be used when emitting files: 'CRLF' (dos) or 'LF' (unix)." },
+        NEWLINE: { code: 6061, category: ts.DiagnosticCategory.Message, key: "NEWLINE_6061", message: "NEWLINE" },
+        Option_0_can_only_be_specified_in_tsconfig_json_file: { code: 6064, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_specified_in_tsconfig_json_file_6064", message: "Option '{0}' can only be specified in 'tsconfig.json' file." },
+        Enables_experimental_support_for_ES7_decorators: { code: 6065, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_decorators_6065", message: "Enables experimental support for ES7 decorators." },
+        Enables_experimental_support_for_emitting_type_metadata_for_decorators: { code: 6066, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_emitting_type_metadata_for_decorators_6066", message: "Enables experimental support for emitting type metadata for decorators." },
+        Enables_experimental_support_for_ES7_async_functions: { code: 6068, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_async_functions_6068", message: "Enables experimental support for ES7 async functions." },
+        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: { code: 6069, category: ts.DiagnosticCategory.Message, key: "Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6_6069", message: "Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6)." },
+        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: { code: 6070, category: ts.DiagnosticCategory.Message, key: "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", message: "Initializes a TypeScript project and creates a tsconfig.json file." },
+        Successfully_created_a_tsconfig_json_file: { code: 6071, category: ts.DiagnosticCategory.Message, key: "Successfully_created_a_tsconfig_json_file_6071", message: "Successfully created a tsconfig.json file." },
+        Suppress_excess_property_checks_for_object_literals: { code: 6072, category: ts.DiagnosticCategory.Message, key: "Suppress_excess_property_checks_for_object_literals_6072", message: "Suppress excess property checks for object literals." },
+        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context. (experimental)" },
+        Do_not_report_errors_on_unused_labels: { code: 6074, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unused_labels_6074", message: "Do not report errors on unused labels." },
+        Report_error_when_not_all_code_paths_in_function_return_a_value: { code: 6075, category: ts.DiagnosticCategory.Message, key: "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", message: "Report error when not all code paths in function return a value." },
+        Report_errors_for_fallthrough_cases_in_switch_statement: { code: 6076, category: ts.DiagnosticCategory.Message, key: "Report_errors_for_fallthrough_cases_in_switch_statement_6076", message: "Report errors for fallthrough cases in switch statement." },
+        Do_not_report_errors_on_unreachable_code: { code: 6077, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unreachable_code_6077", message: "Do not report errors on unreachable code." },
+        Disallow_inconsistently_cased_references_to_the_same_file: { code: 6078, category: ts.DiagnosticCategory.Message, key: "Disallow_inconsistently_cased_references_to_the_same_file_6078", message: "Disallow inconsistently-cased references to the same file." },
+        Specify_library_files_to_be_included_in_the_compilation_Colon: { code: 6079, category: ts.DiagnosticCategory.Message, key: "Specify_library_files_to_be_included_in_the_compilation_Colon_6079", message: "Specify library files to be included in the compilation: " },
+        Specify_JSX_code_generation_Colon_preserve_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_or_react_6080", message: "Specify JSX code generation: 'preserve' or 'react'" },
+        Only_amd_and_system_modules_are_supported_alongside_0: { code: 6082, category: ts.DiagnosticCategory.Error, key: "Only_amd_and_system_modules_are_supported_alongside_0_6082", message: "Only 'amd' and 'system' modules are supported alongside --{0}." },
+        Base_directory_to_resolve_non_absolute_module_names: { code: 6083, category: ts.DiagnosticCategory.Message, key: "Base_directory_to_resolve_non_absolute_module_names_6083", message: "Base directory to resolve non-absolute module names." },
+        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084", message: "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit" },
+        Enable_tracing_of_the_name_resolution_process: { code: 6085, category: ts.DiagnosticCategory.Message, key: "Enable_tracing_of_the_name_resolution_process_6085", message: "Enable tracing of the name resolution process." },
+        Resolving_module_0_from_1: { code: 6086, category: ts.DiagnosticCategory.Message, key: "Resolving_module_0_from_1_6086", message: "======== Resolving module '{0}' from '{1}'. ========" },
+        Explicitly_specified_module_resolution_kind_Colon_0: { code: 6087, category: ts.DiagnosticCategory.Message, key: "Explicitly_specified_module_resolution_kind_Colon_0_6087", message: "Explicitly specified module resolution kind: '{0}'." },
+        Module_resolution_kind_is_not_specified_using_0: { code: 6088, category: ts.DiagnosticCategory.Message, key: "Module_resolution_kind_is_not_specified_using_0_6088", message: "Module resolution kind is not specified, using '{0}'." },
+        Module_name_0_was_successfully_resolved_to_1: { code: 6089, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_successfully_resolved_to_1_6089", message: "======== Module name '{0}' was successfully resolved to '{1}'. ========" },
+        Module_name_0_was_not_resolved: { code: 6090, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_not_resolved_6090", message: "======== Module name '{0}' was not resolved. ========" },
+        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: { code: 6091, category: ts.DiagnosticCategory.Message, key: "paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0_6091", message: "'paths' option is specified, looking for a pattern to match module name '{0}'." },
+        Module_name_0_matched_pattern_1: { code: 6092, category: ts.DiagnosticCategory.Message, key: "Module_name_0_matched_pattern_1_6092", message: "Module name '{0}', matched pattern '{1}'." },
+        Trying_substitution_0_candidate_module_location_Colon_1: { code: 6093, category: ts.DiagnosticCategory.Message, key: "Trying_substitution_0_candidate_module_location_Colon_1_6093", message: "Trying substitution '{0}', candidate module location: '{1}'." },
+        Resolving_module_name_0_relative_to_base_url_1_2: { code: 6094, category: ts.DiagnosticCategory.Message, key: "Resolving_module_name_0_relative_to_base_url_1_2_6094", message: "Resolving module name '{0}' relative to base url '{1}' - '{2}'." },
+        Loading_module_as_file_Slash_folder_candidate_module_location_0: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095", message: "Loading module as file / folder, candidate module location '{0}'." },
+        File_0_does_not_exist: { code: 6096, category: ts.DiagnosticCategory.Message, key: "File_0_does_not_exist_6096", message: "File '{0}' does not exist." },
+        File_0_exist_use_it_as_a_name_resolution_result: { code: 6097, category: ts.DiagnosticCategory.Message, key: "File_0_exist_use_it_as_a_name_resolution_result_6097", message: "File '{0}' exist - use it as a name resolution result." },
+        Loading_module_0_from_node_modules_folder: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_6098", message: "Loading module '{0}' from 'node_modules' folder." },
+        Found_package_json_at_0: { code: 6099, category: ts.DiagnosticCategory.Message, key: "Found_package_json_at_0_6099", message: "Found 'package.json' at '{0}'." },
+        package_json_does_not_have_types_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_types_field_6100", message: "'package.json' does not have 'types' field." },
+        package_json_has_0_field_1_that_references_2: { code: 6101, category: ts.DiagnosticCategory.Message, key: "package_json_has_0_field_1_that_references_2_6101", message: "'package.json' has '{0}' field '{1}' that references '{2}'." },
+        Allow_javascript_files_to_be_compiled: { code: 6102, category: ts.DiagnosticCategory.Message, key: "Allow_javascript_files_to_be_compiled_6102", message: "Allow javascript files to be compiled." },
+        Option_0_should_have_array_of_strings_as_a_value: { code: 6103, category: ts.DiagnosticCategory.Error, key: "Option_0_should_have_array_of_strings_as_a_value_6103", message: "Option '{0}' should have array of strings as a value." },
+        Checking_if_0_is_the_longest_matching_prefix_for_1_2: { code: 6104, category: ts.DiagnosticCategory.Message, key: "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", message: "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'." },
+        Expected_type_of_0_field_in_package_json_to_be_string_got_1: { code: 6105, category: ts.DiagnosticCategory.Message, key: "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", message: "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'." },
+        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'" },
+        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'" },
+        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'" },
+        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'" },
+        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'" },
+        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed" },
+        Do_not_emit_use_strict_directives_in_module_output: { code: 6112, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_use_strict_directives_in_module_output_6112", message: "Do not emit 'use strict' directives in module output." },
+        Enable_strict_null_checks: { code: 6113, category: ts.DiagnosticCategory.Message, key: "Enable_strict_null_checks_6113", message: "Enable strict null checks." },
+        Unknown_option_excludes_Did_you_mean_exclude: { code: 6114, category: ts.DiagnosticCategory.Error, key: "Unknown_option_excludes_Did_you_mean_exclude_6114", message: "Unknown option 'excludes'. Did you mean 'exclude'?" },
+        Raise_error_on_this_expressions_with_an_implied_any_type: { code: 6115, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_this_expressions_with_an_implied_any_type_6115", message: "Raise error on 'this' expressions with an implied 'any' type." },
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: { code: 6116, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_2_6116", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory '{2}'. ========" },
+        Resolving_using_primary_search_paths: { code: 6117, category: ts.DiagnosticCategory.Message, key: "Resolving_using_primary_search_paths_6117", message: "Resolving using primary search paths..." },
+        Resolving_from_node_modules_folder: { code: 6118, category: ts.DiagnosticCategory.Message, key: "Resolving_from_node_modules_folder_6118", message: "Resolving from node_modules folder..." },
+        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: { code: 6119, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", message: "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========" },
+        Type_reference_directive_0_was_not_resolved: { code: 6120, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_not_resolved_6120", message: "======== Type reference directive '{0}' was not resolved. ========" },
+        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'" },
+        Root_directory_cannot_be_determined_skipping_primary_search_paths: { code: 6122, category: ts.DiagnosticCategory.Message, key: "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", message: "Root directory cannot be determined, skipping primary search paths." },
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: { code: 6123, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========" },
+        Type_declaration_files_to_be_included_in_compilation: { code: 6124, category: ts.DiagnosticCategory.Message, key: "Type_declaration_files_to_be_included_in_compilation_6124", message: "Type declaration files to be included in compilation." },
+        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'" },
+        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: { code: 6126, category: ts.DiagnosticCategory.Message, key: "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", message: "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder." },
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: { code: 6127, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", message: "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========" },
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
+        The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
+        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
+        File_name_0_has_a_1_extension_stripping_it: { code: 6132, category: ts.DiagnosticCategory.Message, key: "File_name_0_has_a_1_extension_stripping_it_6132", message: "File name '{0}' has a '{1}' extension - stripping it" },
+        Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
+        Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
+        Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
+        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: { code: 7009, category: ts.DiagnosticCategory.Error, key: "new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type_7009", message: "'new' expression, whose target lacks a construct signature, implicitly has an 'any' type." },
+        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: { code: 7010, category: ts.DiagnosticCategory.Error, key: "_0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type_7010", message: "'{0}', which lacks return-type annotation, implicitly has an '{1}' return type." },
+        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: { code: 7011, category: ts.DiagnosticCategory.Error, key: "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", message: "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type." },
+        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7013, category: ts.DiagnosticCategory.Error, key: "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", message: "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type." },
+        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: { code: 7015, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", message: "Element implicitly has an 'any' type because index expression is not of type 'number'." },
+        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation: { code: 7016, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation_7016", message: "Property '{0}' implicitly has type 'any', because its 'set' accessor lacks a type annotation." },
+        Index_signature_of_object_type_implicitly_has_an_any_type: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Index_signature_of_object_type_implicitly_has_an_any_type_7017", message: "Index signature of object type implicitly has an 'any' type." },
+        Object_literal_s_property_0_implicitly_has_an_1_type: { code: 7018, category: ts.DiagnosticCategory.Error, key: "Object_literal_s_property_0_implicitly_has_an_1_type_7018", message: "Object literal's property '{0}' implicitly has an '{1}' type." },
+        Rest_parameter_0_implicitly_has_an_any_type: { code: 7019, category: ts.DiagnosticCategory.Error, key: "Rest_parameter_0_implicitly_has_an_any_type_7019", message: "Rest parameter '{0}' implicitly has an 'any[]' type." },
+        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7020, category: ts.DiagnosticCategory.Error, key: "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", message: "Call signature, which lacks return-type annotation, implicitly has an 'any' return type." },
+        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: { code: 7022, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or__7022", message: "'{0}' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer." },
+        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7023, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", message: "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
+        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7024, category: ts.DiagnosticCategory.Error, key: "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", message: "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
+        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: { code: 7025, category: ts.DiagnosticCategory.Error, key: "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", message: "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type." },
+        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists" },
+        Unreachable_code_detected: { code: 7027, category: ts.DiagnosticCategory.Error, key: "Unreachable_code_detected_7027", message: "Unreachable code detected." },
+        Unused_label: { code: 7028, category: ts.DiagnosticCategory.Error, key: "Unused_label_7028", message: "Unused label." },
+        Fallthrough_case_in_switch: { code: 7029, category: ts.DiagnosticCategory.Error, key: "Fallthrough_case_in_switch_7029", message: "Fallthrough case in switch." },
+        Not_all_code_paths_return_a_value: { code: 7030, category: ts.DiagnosticCategory.Error, key: "Not_all_code_paths_return_a_value_7030", message: "Not all code paths return a value." },
+        Binding_element_0_implicitly_has_an_1_type: { code: 7031, category: ts.DiagnosticCategory.Error, key: "Binding_element_0_implicitly_has_an_1_type_7031", message: "Binding element '{0}' implicitly has an '{1}' type." },
+        You_cannot_rename_this_element: { code: 8000, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_this_element_8000", message: "You cannot rename this element." },
+        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: { code: 8001, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", message: "You cannot rename elements that are defined in the standard TypeScript library." },
+        import_can_only_be_used_in_a_ts_file: { code: 8002, category: ts.DiagnosticCategory.Error, key: "import_can_only_be_used_in_a_ts_file_8002", message: "'import ... =' can only be used in a .ts file." },
+        export_can_only_be_used_in_a_ts_file: { code: 8003, category: ts.DiagnosticCategory.Error, key: "export_can_only_be_used_in_a_ts_file_8003", message: "'export=' can only be used in a .ts file." },
+        type_parameter_declarations_can_only_be_used_in_a_ts_file: { code: 8004, category: ts.DiagnosticCategory.Error, key: "type_parameter_declarations_can_only_be_used_in_a_ts_file_8004", message: "'type parameter declarations' can only be used in a .ts file." },
+        implements_clauses_can_only_be_used_in_a_ts_file: { code: 8005, category: ts.DiagnosticCategory.Error, key: "implements_clauses_can_only_be_used_in_a_ts_file_8005", message: "'implements clauses' can only be used in a .ts file." },
+        interface_declarations_can_only_be_used_in_a_ts_file: { code: 8006, category: ts.DiagnosticCategory.Error, key: "interface_declarations_can_only_be_used_in_a_ts_file_8006", message: "'interface declarations' can only be used in a .ts file." },
+        module_declarations_can_only_be_used_in_a_ts_file: { code: 8007, category: ts.DiagnosticCategory.Error, key: "module_declarations_can_only_be_used_in_a_ts_file_8007", message: "'module declarations' can only be used in a .ts file." },
+        type_aliases_can_only_be_used_in_a_ts_file: { code: 8008, category: ts.DiagnosticCategory.Error, key: "type_aliases_can_only_be_used_in_a_ts_file_8008", message: "'type aliases' can only be used in a .ts file." },
+        _0_can_only_be_used_in_a_ts_file: { code: 8009, category: ts.DiagnosticCategory.Error, key: "_0_can_only_be_used_in_a_ts_file_8009", message: "'{0}' can only be used in a .ts file." },
+        types_can_only_be_used_in_a_ts_file: { code: 8010, category: ts.DiagnosticCategory.Error, key: "types_can_only_be_used_in_a_ts_file_8010", message: "'types' can only be used in a .ts file." },
+        type_arguments_can_only_be_used_in_a_ts_file: { code: 8011, category: ts.DiagnosticCategory.Error, key: "type_arguments_can_only_be_used_in_a_ts_file_8011", message: "'type arguments' can only be used in a .ts file." },
+        parameter_modifiers_can_only_be_used_in_a_ts_file: { code: 8012, category: ts.DiagnosticCategory.Error, key: "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", message: "'parameter modifiers' can only be used in a .ts file." },
+        property_declarations_can_only_be_used_in_a_ts_file: { code: 8014, category: ts.DiagnosticCategory.Error, key: "property_declarations_can_only_be_used_in_a_ts_file_8014", message: "'property declarations' can only be used in a .ts file." },
+        enum_declarations_can_only_be_used_in_a_ts_file: { code: 8015, category: ts.DiagnosticCategory.Error, key: "enum_declarations_can_only_be_used_in_a_ts_file_8015", message: "'enum declarations' can only be used in a .ts file." },
+        type_assertion_expressions_can_only_be_used_in_a_ts_file: { code: 8016, category: ts.DiagnosticCategory.Error, key: "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", message: "'type assertion expressions' can only be used in a .ts file." },
+        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses." },
+        class_expressions_are_not_currently_supported: { code: 9003, category: ts.DiagnosticCategory.Error, key: "class_expressions_are_not_currently_supported_9003", message: "'class' expressions are not currently supported." },
+        JSX_attributes_must_only_be_assigned_a_non_empty_expression: { code: 17000, category: ts.DiagnosticCategory.Error, key: "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", message: "JSX attributes must only be assigned a non-empty 'expression'." },
+        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: { code: 17001, category: ts.DiagnosticCategory.Error, key: "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", message: "JSX elements cannot have multiple attributes with the same name." },
+        Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: ts.DiagnosticCategory.Error, key: "Expected_corresponding_JSX_closing_tag_for_0_17002", message: "Expected corresponding JSX closing tag for '{0}'." },
+        JSX_attribute_expected: { code: 17003, category: ts.DiagnosticCategory.Error, key: "JSX_attribute_expected_17003", message: "JSX attribute expected." },
+        Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: ts.DiagnosticCategory.Error, key: "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", message: "Cannot use JSX unless the '--jsx' flag is provided." },
+        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'" },
+        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17006, category: ts.DiagnosticCategory.Error, key: "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", message: "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
+        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17007, category: ts.DiagnosticCategory.Error, key: "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", message: "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
+        JSX_element_0_has_no_corresponding_closing_tag: { code: 17008, category: ts.DiagnosticCategory.Error, key: "JSX_element_0_has_no_corresponding_closing_tag_17008", message: "JSX element '{0}' has no corresponding closing tag." },
+        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: { code: 17009, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", message: "'super' must be called before accessing 'this' in the constructor of a derived class." },
+        Unknown_typing_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_typing_option_0_17010", message: "Unknown typing option '{0}'." }
+    };
+})(ts || (ts = {}));
+/// <reference path="core.ts"/>
+/// <reference path="diagnosticInformationMap.generated.ts"/>
+var ts;
+(function (ts) {
+    /* @internal */
+    function tokenIsIdentifierOrKeyword(token) {
+        return token >= 69 /* Identifier */;
+    }
+    ts.tokenIsIdentifierOrKeyword = tokenIsIdentifierOrKeyword;
+    var textToToken = {
+        "abstract": 115 /* AbstractKeyword */,
+        "any": 117 /* AnyKeyword */,
+        "as": 116 /* AsKeyword */,
+        "boolean": 120 /* BooleanKeyword */,
+        "break": 70 /* BreakKeyword */,
+        "case": 71 /* CaseKeyword */,
+        "catch": 72 /* CatchKeyword */,
+        "class": 73 /* ClassKeyword */,
+        "continue": 75 /* ContinueKeyword */,
+        "const": 74 /* ConstKeyword */,
+        "constructor": 121 /* ConstructorKeyword */,
+        "debugger": 76 /* DebuggerKeyword */,
+        "declare": 122 /* DeclareKeyword */,
+        "default": 77 /* DefaultKeyword */,
+        "delete": 78 /* DeleteKeyword */,
+        "do": 79 /* DoKeyword */,
+        "else": 80 /* ElseKeyword */,
+        "enum": 81 /* EnumKeyword */,
+        "export": 82 /* ExportKeyword */,
+        "extends": 83 /* ExtendsKeyword */,
+        "false": 84 /* FalseKeyword */,
+        "finally": 85 /* FinallyKeyword */,
+        "for": 86 /* ForKeyword */,
+        "from": 136 /* FromKeyword */,
+        "function": 87 /* FunctionKeyword */,
+        "get": 123 /* GetKeyword */,
+        "if": 88 /* IfKeyword */,
+        "implements": 106 /* ImplementsKeyword */,
+        "import": 89 /* ImportKeyword */,
+        "in": 90 /* InKeyword */,
+        "instanceof": 91 /* InstanceOfKeyword */,
+        "interface": 107 /* InterfaceKeyword */,
+        "is": 124 /* IsKeyword */,
+        "let": 108 /* LetKeyword */,
+        "module": 125 /* ModuleKeyword */,
+        "namespace": 126 /* NamespaceKeyword */,
+        "never": 127 /* NeverKeyword */,
+        "new": 92 /* NewKeyword */,
+        "null": 93 /* NullKeyword */,
+        "number": 130 /* NumberKeyword */,
+        "package": 109 /* PackageKeyword */,
+        "private": 110 /* PrivateKeyword */,
+        "protected": 111 /* ProtectedKeyword */,
+        "public": 112 /* PublicKeyword */,
+        "readonly": 128 /* ReadonlyKeyword */,
+        "require": 129 /* RequireKeyword */,
+        "global": 137 /* GlobalKeyword */,
+        "return": 94 /* ReturnKeyword */,
+        "set": 131 /* SetKeyword */,
+        "static": 113 /* StaticKeyword */,
+        "string": 132 /* StringKeyword */,
+        "super": 95 /* SuperKeyword */,
+        "switch": 96 /* SwitchKeyword */,
+        "symbol": 133 /* SymbolKeyword */,
+        "this": 97 /* ThisKeyword */,
+        "throw": 98 /* ThrowKeyword */,
+        "true": 99 /* TrueKeyword */,
+        "try": 100 /* TryKeyword */,
+        "type": 134 /* TypeKeyword */,
+        "typeof": 101 /* TypeOfKeyword */,
+        "undefined": 135 /* UndefinedKeyword */,
+        "var": 102 /* VarKeyword */,
+        "void": 103 /* VoidKeyword */,
+        "while": 104 /* WhileKeyword */,
+        "with": 105 /* WithKeyword */,
+        "yield": 114 /* YieldKeyword */,
+        "async": 118 /* AsyncKeyword */,
+        "await": 119 /* AwaitKeyword */,
+        "of": 138 /* OfKeyword */,
+        "{": 15 /* OpenBraceToken */,
+        "}": 16 /* CloseBraceToken */,
+        "(": 17 /* OpenParenToken */,
+        ")": 18 /* CloseParenToken */,
+        "[": 19 /* OpenBracketToken */,
+        "]": 20 /* CloseBracketToken */,
+        ".": 21 /* DotToken */,
+        "...": 22 /* DotDotDotToken */,
+        ";": 23 /* SemicolonToken */,
+        ",": 24 /* CommaToken */,
+        "<": 25 /* LessThanToken */,
+        ">": 27 /* GreaterThanToken */,
+        "<=": 28 /* LessThanEqualsToken */,
+        ">=": 29 /* GreaterThanEqualsToken */,
+        "==": 30 /* EqualsEqualsToken */,
+        "!=": 31 /* ExclamationEqualsToken */,
+        "===": 32 /* EqualsEqualsEqualsToken */,
+        "!==": 33 /* ExclamationEqualsEqualsToken */,
+        "=>": 34 /* EqualsGreaterThanToken */,
+        "+": 35 /* PlusToken */,
+        "-": 36 /* MinusToken */,
+        "**": 38 /* AsteriskAsteriskToken */,
+        "*": 37 /* AsteriskToken */,
+        "/": 39 /* SlashToken */,
+        "%": 40 /* PercentToken */,
+        "++": 41 /* PlusPlusToken */,
+        "--": 42 /* MinusMinusToken */,
+        "<<": 43 /* LessThanLessThanToken */,
+        "</": 26 /* LessThanSlashToken */,
+        ">>": 44 /* GreaterThanGreaterThanToken */,
+        ">>>": 45 /* GreaterThanGreaterThanGreaterThanToken */,
+        "&": 46 /* AmpersandToken */,
+        "|": 47 /* BarToken */,
+        "^": 48 /* CaretToken */,
+        "!": 49 /* ExclamationToken */,
+        "~": 50 /* TildeToken */,
+        "&&": 51 /* AmpersandAmpersandToken */,
+        "||": 52 /* BarBarToken */,
+        "?": 53 /* QuestionToken */,
+        ":": 54 /* ColonToken */,
+        "=": 56 /* EqualsToken */,
+        "+=": 57 /* PlusEqualsToken */,
+        "-=": 58 /* MinusEqualsToken */,
+        "*=": 59 /* AsteriskEqualsToken */,
+        "**=": 60 /* AsteriskAsteriskEqualsToken */,
+        "/=": 61 /* SlashEqualsToken */,
+        "%=": 62 /* PercentEqualsToken */,
+        "<<=": 63 /* LessThanLessThanEqualsToken */,
+        ">>=": 64 /* GreaterThanGreaterThanEqualsToken */,
+        ">>>=": 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */,
+        "&=": 66 /* AmpersandEqualsToken */,
+        "|=": 67 /* BarEqualsToken */,
+        "^=": 68 /* CaretEqualsToken */,
+        "@": 55 /* AtToken */
+    };
+    /*
+        As per ECMAScript Language Specification 3th Edition, Section 7.6: Identifiers
+        IdentifierStart ::
+            Can contain Unicode 3.0.0  categories:
+            Uppercase letter (Lu),
+            Lowercase letter (Ll),
+            Titlecase letter (Lt),
+            Modifier letter (Lm),
+            Other letter (Lo), or
+            Letter number (Nl).
+        IdentifierPart :: =
+            Can contain IdentifierStart + Unicode 3.0.0  categories:
+            Non-spacing mark (Mn),
+            Combining spacing mark (Mc),
+            Decimal number (Nd), or
+            Connector punctuation (Pc).
+
+        Codepoint ranges for ES3 Identifiers are extracted from the Unicode 3.0.0 specification at:
+        http://www.unicode.org/Public/3.0-Update/UnicodeData-3.0.0.txt
+    */
+    var unicodeES3IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1610, 1649, 1747, 1749, 1749, 1765, 1766, 1786, 1788, 1808, 1808, 1810, 1836, 1920, 1957, 2309, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2784, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3294, 3294, 3296, 3297, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3424, 3425, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3805, 3840, 3840, 3904, 3911, 3913, 3946, 3976, 3979, 4096, 4129, 4131, 4135, 4137, 4138, 4176, 4181, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6067, 6176, 6263, 6272, 6312, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8319, 8319, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12346, 12353, 12436, 12445, 12446, 12449, 12538, 12540, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65138, 65140, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    var unicodeES3IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 768, 846, 864, 866, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1155, 1158, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1441, 1443, 1465, 1467, 1469, 1471, 1471, 1473, 1474, 1476, 1476, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1621, 1632, 1641, 1648, 1747, 1749, 1756, 1759, 1768, 1770, 1773, 1776, 1788, 1808, 1836, 1840, 1866, 1920, 1968, 2305, 2307, 2309, 2361, 2364, 2381, 2384, 2388, 2392, 2403, 2406, 2415, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2492, 2494, 2500, 2503, 2504, 2507, 2509, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2562, 2562, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2649, 2652, 2654, 2654, 2662, 2676, 2689, 2691, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2784, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2876, 2883, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2913, 2918, 2927, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3031, 3031, 3047, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3134, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3168, 3169, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3262, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3297, 3302, 3311, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3390, 3395, 3398, 3400, 3402, 3405, 3415, 3415, 3424, 3425, 3430, 3439, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3805, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3946, 3953, 3972, 3974, 3979, 3984, 3991, 3993, 4028, 4038, 4038, 4096, 4129, 4131, 4135, 4137, 4138, 4140, 4146, 4150, 4153, 4160, 4169, 4176, 4185, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 4969, 4977, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6099, 6112, 6121, 6160, 6169, 6176, 6263, 6272, 6313, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8255, 8256, 8319, 8319, 8400, 8412, 8417, 8417, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12346, 12353, 12436, 12441, 12442, 12445, 12446, 12449, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65056, 65059, 65075, 65076, 65101, 65103, 65136, 65138, 65140, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65381, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    /*
+        As per ECMAScript Language Specification 5th Edition, Section 7.6: ISyntaxToken Names and Identifiers
+        IdentifierStart ::
+            Can contain Unicode 6.2  categories:
+            Uppercase letter (Lu),
+            Lowercase letter (Ll),
+            Titlecase letter (Lt),
+            Modifier letter (Lm),
+            Other letter (Lo), or
+            Letter number (Nl).
+        IdentifierPart ::
+            Can contain IdentifierStart + Unicode 6.2  categories:
+            Non-spacing mark (Mn),
+            Combining spacing mark (Mc),
+            Decimal number (Nd),
+            Connector punctuation (Pc),
+            <ZWNJ>, or
+            <ZWJ>.
+
+        Codepoint ranges for ES5 Identifiers are extracted from the Unicode 6.2 specification at:
+        http://www.unicode.org/Public/6.2.0/ucd/UnicodeData.txt
+    */
+    var unicodeES5IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389, 6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688, 6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141, 7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015, 43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259, 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520, 43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695, 43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739, 43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    var unicodeES5IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520, 1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788, 1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112, 2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423, 2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929, 2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424, 3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272, 6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    function lookupInUnicodeMap(code, map) {
+        // Bail out quickly if it couldn't possibly be in the map.
+        if (code < map[0]) {
+            return false;
+        }
+        // Perform binary search in one of the Unicode range maps
+        var lo = 0;
+        var hi = map.length;
+        var mid;
+        while (lo + 1 < hi) {
+            mid = lo + (hi - lo) / 2;
+            // mid has to be even to catch a range's beginning
+            mid -= mid % 2;
+            if (map[mid] <= code && code <= map[mid + 1]) {
+                return true;
+            }
+            if (code < map[mid]) {
+                hi = mid;
+            }
+            else {
+                lo = mid + 2;
+            }
+        }
+        return false;
+    }
+    /* @internal */ function isUnicodeIdentifierStart(code, languageVersion) {
+        return languageVersion >= 1 /* ES5 */ ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
+    }
+    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
+    function isUnicodeIdentifierPart(code, languageVersion) {
+        return languageVersion >= 1 /* ES5 */ ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
+    }
+    function makeReverseMap(source) {
+        var result = [];
+        for (var name_4 in source) {
+            if (source.hasOwnProperty(name_4)) {
+                result[source[name_4]] = name_4;
+            }
+        }
+        return result;
+    }
+    var tokenStrings = makeReverseMap(textToToken);
+    function tokenToString(t) {
+        return tokenStrings[t];
+    }
+    ts.tokenToString = tokenToString;
+    /* @internal */
+    function stringToToken(s) {
+        return textToToken[s];
+    }
+    ts.stringToToken = stringToToken;
+    /* @internal */
+    function computeLineStarts(text) {
+        var result = new Array();
+        var pos = 0;
+        var lineStart = 0;
+        while (pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 13 /* carriageReturn */:
+                    if (text.charCodeAt(pos) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                case 10 /* lineFeed */:
+                    result.push(lineStart);
+                    lineStart = pos;
+                    break;
+                default:
+                    if (ch > 127 /* maxAsciiCharacter */ && isLineBreak(ch)) {
+                        result.push(lineStart);
+                        lineStart = pos;
+                    }
+                    break;
+            }
+        }
+        result.push(lineStart);
+        return result;
+    }
+    ts.computeLineStarts = computeLineStarts;
+    function getPositionOfLineAndCharacter(sourceFile, line, character) {
+        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
+    }
+    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
+    /* @internal */
+    function computePositionOfLineAndCharacter(lineStarts, line, character) {
+        ts.Debug.assert(line >= 0 && line < lineStarts.length);
+        return lineStarts[line] + character;
+    }
+    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
+    /* @internal */
+    function getLineStarts(sourceFile) {
+        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
+    }
+    ts.getLineStarts = getLineStarts;
+    /* @internal */
+    /**
+     * We assume the first line starts at position 0 and 'position' is non-negative.
+     */
+    function computeLineAndCharacterOfPosition(lineStarts, position) {
+        var lineNumber = ts.binarySearch(lineStarts, position);
+        if (lineNumber < 0) {
+            // If the actual position was not found,
+            // the binary search returns the 2's-complement of the next line start
+            // e.g. if the line starts at [5, 10, 23, 80] and the position requested was 20
+            // then the search will return -2.
+            //
+            // We want the index of the previous line start, so we subtract 1.
+            // Review 2's-complement if this is confusing.
+            lineNumber = ~lineNumber - 1;
+            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
+        }
+        return {
+            line: lineNumber,
+            character: position - lineStarts[lineNumber]
+        };
+    }
+    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
+    function getLineAndCharacterOfPosition(sourceFile, position) {
+        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
+    }
+    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
+    var hasOwnProperty = Object.prototype.hasOwnProperty;
+    function isWhiteSpace(ch) {
+        // Note: nextLine is in the Zs space, and should be considered to be a whitespace.
+        // It is explicitly not a line-break as it isn't in the exact set specified by EcmaScript.
+        return ch === 32 /* space */ ||
+            ch === 9 /* tab */ ||
+            ch === 11 /* verticalTab */ ||
+            ch === 12 /* formFeed */ ||
+            ch === 160 /* nonBreakingSpace */ ||
+            ch === 133 /* nextLine */ ||
+            ch === 5760 /* ogham */ ||
+            ch >= 8192 /* enQuad */ && ch <= 8203 /* zeroWidthSpace */ ||
+            ch === 8239 /* narrowNoBreakSpace */ ||
+            ch === 8287 /* mathematicalSpace */ ||
+            ch === 12288 /* ideographicSpace */ ||
+            ch === 65279 /* byteOrderMark */;
+    }
+    ts.isWhiteSpace = isWhiteSpace;
+    function isLineBreak(ch) {
+        // ES5 7.3:
+        // The ECMAScript line terminator characters are listed in Table 3.
+        //     Table 3: Line Terminator Characters
+        //     Code Unit Value     Name                    Formal Name
+        //     \u000A              Line Feed               <LF>
+        //     \u000D              Carriage Return         <CR>
+        //     \u2028              Line separator          <LS>
+        //     \u2029              Paragraph separator     <PS>
+        // Only the characters in Table 3 are treated as line terminators. Other new line or line
+        // breaking characters are treated as white space but not as line terminators.
+        return ch === 10 /* lineFeed */ ||
+            ch === 13 /* carriageReturn */ ||
+            ch === 8232 /* lineSeparator */ ||
+            ch === 8233 /* paragraphSeparator */;
+    }
+    ts.isLineBreak = isLineBreak;
+    function isDigit(ch) {
+        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
+    }
+    /* @internal */
+    function isOctalDigit(ch) {
+        return ch >= 48 /* _0 */ && ch <= 55 /* _7 */;
+    }
+    ts.isOctalDigit = isOctalDigit;
+    function couldStartTrivia(text, pos) {
+        // Keep in sync with skipTrivia
+        var ch = text.charCodeAt(pos);
+        switch (ch) {
+            case 13 /* carriageReturn */:
+            case 10 /* lineFeed */:
+            case 9 /* tab */:
+            case 11 /* verticalTab */:
+            case 12 /* formFeed */:
+            case 32 /* space */:
+            case 47 /* slash */:
+            // starts of normal trivia
+            case 60 /* lessThan */:
+            case 61 /* equals */:
+            case 62 /* greaterThan */:
+                // Starts of conflict marker trivia
+                return true;
+            case 35 /* hash */:
+                // Only if its the beginning can we have #! trivia
+                return pos === 0;
+            default:
+                return ch > 127 /* maxAsciiCharacter */;
+        }
+    }
+    ts.couldStartTrivia = couldStartTrivia;
+    /* @internal */
+    function skipTrivia(text, pos, stopAfterLineBreak, stopAtComments) {
+        if (stopAtComments === void 0) { stopAtComments = false; }
+        // Using ! with a greater than test is a fast way of testing the following conditions:
+        //  pos === undefined || pos === null || isNaN(pos) || pos < 0;
+        if (!(pos >= 0)) {
+            return pos;
+        }
+        // Keep in sync with couldStartTrivia
+        while (true) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13 /* carriageReturn */:
+                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                case 10 /* lineFeed */:
+                    pos++;
+                    if (stopAfterLineBreak) {
+                        return pos;
+                    }
+                    continue;
+                case 9 /* tab */:
+                case 11 /* verticalTab */:
+                case 12 /* formFeed */:
+                case 32 /* space */:
+                    pos++;
+                    continue;
+                case 47 /* slash */:
+                    if (stopAtComments) {
+                        break;
+                    }
+                    if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (isLineBreak(text.charCodeAt(pos))) {
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                pos += 2;
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    break;
+                case 60 /* lessThan */:
+                case 61 /* equals */:
+                case 62 /* greaterThan */:
+                    if (isConflictMarkerTrivia(text, pos)) {
+                        pos = scanConflictMarkerTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                case 35 /* hash */:
+                    if (pos === 0 && isShebangTrivia(text, pos)) {
+                        pos = scanShebangTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                default:
+                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpace(ch) || isLineBreak(ch))) {
+                        pos++;
+                        continue;
+                    }
+                    break;
+            }
+            return pos;
+        }
+    }
+    ts.skipTrivia = skipTrivia;
+    // All conflict markers consist of the same character repeated seven times.  If it is
+    // a <<<<<<< or >>>>>>> marker then it is also followed by a space.
+    var mergeConflictMarkerLength = "<<<<<<<".length;
+    function isConflictMarkerTrivia(text, pos) {
+        ts.Debug.assert(pos >= 0);
+        // Conflict markers must be at the start of a line.
+        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
+            var ch = text.charCodeAt(pos);
+            if ((pos + mergeConflictMarkerLength) < text.length) {
+                for (var i = 0, n = mergeConflictMarkerLength; i < n; i++) {
+                    if (text.charCodeAt(pos + i) !== ch) {
+                        return false;
+                    }
+                }
+                return ch === 61 /* equals */ ||
+                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32 /* space */;
+            }
+        }
+        return false;
+    }
+    function scanConflictMarkerTrivia(text, pos, error) {
+        if (error) {
+            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
+        }
+        var ch = text.charCodeAt(pos);
+        var len = text.length;
+        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
+            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
+                pos++;
+            }
+        }
+        else {
+            ts.Debug.assert(ch === 61 /* equals */);
+            // Consume everything from the start of the mid-conflict marker to the start of the next
+            // end-conflict marker.
+            while (pos < len) {
+                var ch_1 = text.charCodeAt(pos);
+                if (ch_1 === 62 /* greaterThan */ && isConflictMarkerTrivia(text, pos)) {
+                    break;
+                }
+                pos++;
+            }
+        }
+        return pos;
+    }
+    var shebangTriviaRegex = /^#!.*/;
+    function isShebangTrivia(text, pos) {
+        // Shebangs check must only be done at the start of the file
+        ts.Debug.assert(pos === 0);
+        return shebangTriviaRegex.test(text);
+    }
+    function scanShebangTrivia(text, pos) {
+        var shebang = shebangTriviaRegex.exec(text)[0];
+        pos = pos + shebang.length;
+        return pos;
+    }
+    /**
+     * Extract comments from text prefixing the token closest following `pos`.
+     * The return value is an array containing a TextRange for each comment.
+     * Single-line comment ranges include the beginning '//' characters but not the ending line break.
+     * Multi - line comment ranges include the beginning '/* and ending '<asterisk>/' characters.
+     * The return value is undefined if no comments were found.
+     * @param trailing
+     * If false, whitespace is skipped until the first line break and comments between that location
+     * and the next token are returned.
+     * If true, comments occurring between the given position and the next line break are returned.
+     */
+    function getCommentRanges(text, pos, trailing) {
+        var result;
+        var collecting = trailing || pos === 0;
+        while (pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13 /* carriageReturn */:
+                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                case 10 /* lineFeed */:
+                    pos++;
+                    if (trailing) {
+                        return result;
+                    }
+                    collecting = true;
+                    if (result && result.length) {
+                        ts.lastOrUndefined(result).hasTrailingNewLine = true;
+                    }
+                    continue;
+                case 9 /* tab */:
+                case 11 /* verticalTab */:
+                case 12 /* formFeed */:
+                case 32 /* space */:
+                    pos++;
+                    continue;
+                case 47 /* slash */:
+                    var nextChar = text.charCodeAt(pos + 1);
+                    var hasTrailingNewLine = false;
+                    if (nextChar === 47 /* slash */ || nextChar === 42 /* asterisk */) {
+                        var kind = nextChar === 47 /* slash */ ? 2 /* SingleLineCommentTrivia */ : 3 /* MultiLineCommentTrivia */;
+                        var startPos = pos;
+                        pos += 2;
+                        if (nextChar === 47 /* slash */) {
+                            while (pos < text.length) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    hasTrailingNewLine = true;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        else {
+                            while (pos < text.length) {
+                                if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                    pos += 2;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        if (collecting) {
+                            if (!result) {
+                                result = [];
+                            }
+                            result.push({ pos: startPos, end: pos, hasTrailingNewLine: hasTrailingNewLine, kind: kind });
+                        }
+                        continue;
+                    }
+                    break;
+                default:
+                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpace(ch) || isLineBreak(ch))) {
+                        if (result && result.length && isLineBreak(ch)) {
+                            ts.lastOrUndefined(result).hasTrailingNewLine = true;
+                        }
+                        pos++;
+                        continue;
+                    }
+                    break;
+            }
+            return result;
+        }
+        return result;
+    }
+    function getLeadingCommentRanges(text, pos) {
+        return getCommentRanges(text, pos, /*trailing*/ false);
+    }
+    ts.getLeadingCommentRanges = getLeadingCommentRanges;
+    function getTrailingCommentRanges(text, pos) {
+        return getCommentRanges(text, pos, /*trailing*/ true);
+    }
+    ts.getTrailingCommentRanges = getTrailingCommentRanges;
+    /** Optionally, get the shebang */
+    function getShebang(text) {
+        return shebangTriviaRegex.test(text)
+            ? shebangTriviaRegex.exec(text)[0]
+            : undefined;
+    }
+    ts.getShebang = getShebang;
+    function isIdentifierStart(ch, languageVersion) {
+        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
+            ch === 36 /* $ */ || ch === 95 /* _ */ ||
+            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierStart(ch, languageVersion);
+    }
+    ts.isIdentifierStart = isIdentifierStart;
+    function isIdentifierPart(ch, languageVersion) {
+        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
+            ch >= 48 /* _0 */ && ch <= 57 /* _9 */ || ch === 36 /* $ */ || ch === 95 /* _ */ ||
+            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierPart(ch, languageVersion);
+    }
+    ts.isIdentifierPart = isIdentifierPart;
+    /* @internal */
+    function isIdentifier(name, languageVersion) {
+        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
+            return false;
+        }
+        for (var i = 1, n = name.length; i < n; i++) {
+            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.isIdentifier = isIdentifier;
+    // Creates a scanner over a (possibly unspecified) range of a piece of text.
+    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
+        if (languageVariant === void 0) { languageVariant = 0 /* Standard */; }
+        // Current position (end position of text of current token)
+        var pos;
+        // end of text
+        var end;
+        // Start position of whitespace before current token
+        var startPos;
+        // Start position of text of current token
+        var tokenPos;
+        var token;
+        var tokenValue;
+        var precedingLineBreak;
+        var hasExtendedUnicodeEscape;
+        var tokenIsUnterminated;
+        setText(text, start, length);
+        return {
+            getStartPos: function () { return startPos; },
+            getTextPos: function () { return pos; },
+            getToken: function () { return token; },
+            getTokenPos: function () { return tokenPos; },
+            getTokenText: function () { return text.substring(tokenPos, pos); },
+            getTokenValue: function () { return tokenValue; },
+            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
+            hasPrecedingLineBreak: function () { return precedingLineBreak; },
+            isIdentifier: function () { return token === 69 /* Identifier */ || token > 105 /* LastReservedWord */; },
+            isReservedWord: function () { return token >= 70 /* FirstReservedWord */ && token <= 105 /* LastReservedWord */; },
+            isUnterminated: function () { return tokenIsUnterminated; },
+            reScanGreaterToken: reScanGreaterToken,
+            reScanSlashToken: reScanSlashToken,
+            reScanTemplateToken: reScanTemplateToken,
+            scanJsxIdentifier: scanJsxIdentifier,
+            reScanJsxToken: reScanJsxToken,
+            scanJsxToken: scanJsxToken,
+            scanJSDocToken: scanJSDocToken,
+            scan: scan,
+            setText: setText,
+            setScriptTarget: setScriptTarget,
+            setLanguageVariant: setLanguageVariant,
+            setOnError: setOnError,
+            setTextPos: setTextPos,
+            tryScan: tryScan,
+            lookAhead: lookAhead,
+            scanRange: scanRange
+        };
+        function error(message, length) {
+            if (onError) {
+                onError(message, length || 0);
+            }
+        }
+        function scanNumber() {
+            var start = pos;
+            while (isDigit(text.charCodeAt(pos)))
+                pos++;
+            if (text.charCodeAt(pos) === 46 /* dot */) {
+                pos++;
+                while (isDigit(text.charCodeAt(pos)))
+                    pos++;
+            }
+            var end = pos;
+            if (text.charCodeAt(pos) === 69 /* E */ || text.charCodeAt(pos) === 101 /* e */) {
+                pos++;
+                if (text.charCodeAt(pos) === 43 /* plus */ || text.charCodeAt(pos) === 45 /* minus */)
+                    pos++;
+                if (isDigit(text.charCodeAt(pos))) {
+                    pos++;
+                    while (isDigit(text.charCodeAt(pos)))
+                        pos++;
+                    end = pos;
+                }
+                else {
+                    error(ts.Diagnostics.Digit_expected);
+                }
+            }
+            return "" + +(text.substring(start, end));
+        }
+        function scanOctalDigits() {
+            var start = pos;
+            while (isOctalDigit(text.charCodeAt(pos))) {
+                pos++;
+            }
+            return +(text.substring(start, pos));
+        }
+        /**
+         * Scans the given number of hexadecimal digits in the text,
+         * returning -1 if the given number is unavailable.
+         */
+        function scanExactNumberOfHexDigits(count) {
+            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ false);
+        }
+        /**
+         * Scans as many hexadecimal digits as are available in the text,
+         * returning -1 if the given number of digits was unavailable.
+         */
+        function scanMinimumNumberOfHexDigits(count) {
+            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ true);
+        }
+        function scanHexDigits(minCount, scanAsManyAsPossible) {
+            var digits = 0;
+            var value = 0;
+            while (digits < minCount || scanAsManyAsPossible) {
+                var ch = text.charCodeAt(pos);
+                if (ch >= 48 /* _0 */ && ch <= 57 /* _9 */) {
+                    value = value * 16 + ch - 48 /* _0 */;
+                }
+                else if (ch >= 65 /* A */ && ch <= 70 /* F */) {
+                    value = value * 16 + ch - 65 /* A */ + 10;
+                }
+                else if (ch >= 97 /* a */ && ch <= 102 /* f */) {
+                    value = value * 16 + ch - 97 /* a */ + 10;
+                }
+                else {
+                    break;
+                }
+                pos++;
+                digits++;
+            }
+            if (digits < minCount) {
+                value = -1;
+            }
+            return value;
+        }
+        function scanString() {
+            var quote = text.charCodeAt(pos);
+            pos++;
+            var result = "";
+            var start = pos;
+            while (true) {
+                if (pos >= end) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                var ch = text.charCodeAt(pos);
+                if (ch === quote) {
+                    result += text.substring(start, pos);
+                    pos++;
+                    break;
+                }
+                if (ch === 92 /* backslash */) {
+                    result += text.substring(start, pos);
+                    result += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                if (isLineBreak(ch)) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                pos++;
+            }
+            return result;
+        }
+        /**
+         * Sets the current 'tokenValue' and returns a NoSubstitutionTemplateLiteral or
+         * a literal component of a TemplateExpression.
+         */
+        function scanTemplateAndSetTokenValue() {
+            var startedWithBacktick = text.charCodeAt(pos) === 96 /* backtick */;
+            pos++;
+            var start = pos;
+            var contents = "";
+            var resultingToken;
+            while (true) {
+                if (pos >= end) {
+                    contents += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_template_literal);
+                    resultingToken = startedWithBacktick ? 11 /* NoSubstitutionTemplateLiteral */ : 14 /* TemplateTail */;
+                    break;
+                }
+                var currChar = text.charCodeAt(pos);
+                // '`'
+                if (currChar === 96 /* backtick */) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    resultingToken = startedWithBacktick ? 11 /* NoSubstitutionTemplateLiteral */ : 14 /* TemplateTail */;
+                    break;
+                }
+                // '${'
+                if (currChar === 36 /* $ */ && pos + 1 < end && text.charCodeAt(pos + 1) === 123 /* openBrace */) {
+                    contents += text.substring(start, pos);
+                    pos += 2;
+                    resultingToken = startedWithBacktick ? 12 /* TemplateHead */ : 13 /* TemplateMiddle */;
+                    break;
+                }
+                // Escape character
+                if (currChar === 92 /* backslash */) {
+                    contents += text.substring(start, pos);
+                    contents += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                // Speculated ECMAScript 6 Spec 11.8.6.1:
+                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for Template Values
+                if (currChar === 13 /* carriageReturn */) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                    contents += "\n";
+                    start = pos;
+                    continue;
+                }
+                pos++;
+            }
+            ts.Debug.assert(resultingToken !== undefined);
+            tokenValue = contents;
+            return resultingToken;
+        }
+        function scanEscapeSequence() {
+            pos++;
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                return "";
+            }
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 48 /* _0 */:
+                    return "\0";
+                case 98 /* b */:
+                    return "\b";
+                case 116 /* t */:
+                    return "\t";
+                case 110 /* n */:
+                    return "\n";
+                case 118 /* v */:
+                    return "\v";
+                case 102 /* f */:
+                    return "\f";
+                case 114 /* r */:
+                    return "\r";
+                case 39 /* singleQuote */:
+                    return "\'";
+                case 34 /* doubleQuote */:
+                    return "\"";
+                case 117 /* u */:
+                    // '\u{DDDDDDDD}'
+                    if (pos < end && text.charCodeAt(pos) === 123 /* openBrace */) {
+                        hasExtendedUnicodeEscape = true;
+                        pos++;
+                        return scanExtendedUnicodeEscape();
+                    }
+                    // '\uDDDD'
+                    return scanHexadecimalEscape(/*numDigits*/ 4);
+                case 120 /* x */:
+                    // '\xDD'
+                    return scanHexadecimalEscape(/*numDigits*/ 2);
+                // when encountering a LineContinuation (i.e. a backslash and a line terminator sequence),
+                // the line terminator is interpreted to be "the empty code unit sequence".
+                case 13 /* carriageReturn */:
+                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                // fall through
+                case 10 /* lineFeed */:
+                case 8232 /* lineSeparator */:
+                case 8233 /* paragraphSeparator */:
+                    return "";
+                default:
+                    return String.fromCharCode(ch);
+            }
+        }
+        function scanHexadecimalEscape(numDigits) {
+            var escapedValue = scanExactNumberOfHexDigits(numDigits);
+            if (escapedValue >= 0) {
+                return String.fromCharCode(escapedValue);
+            }
+            else {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                return "";
+            }
+        }
+        function scanExtendedUnicodeEscape() {
+            var escapedValue = scanMinimumNumberOfHexDigits(1);
+            var isInvalidExtendedEscape = false;
+            // Validate the value of the digit
+            if (escapedValue < 0) {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                isInvalidExtendedEscape = true;
+            }
+            else if (escapedValue > 0x10FFFF) {
+                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
+                isInvalidExtendedEscape = true;
+            }
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                isInvalidExtendedEscape = true;
+            }
+            else if (text.charCodeAt(pos) === 125 /* closeBrace */) {
+                // Only swallow the following character up if it's a '}'.
+                pos++;
+            }
+            else {
+                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
+                isInvalidExtendedEscape = true;
+            }
+            if (isInvalidExtendedEscape) {
+                return "";
+            }
+            return utf16EncodeAsString(escapedValue);
+        }
+        // Derived from the 10.1.1 UTF16Encoding of the ES6 Spec.
+        function utf16EncodeAsString(codePoint) {
+            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
+            if (codePoint <= 65535) {
+                return String.fromCharCode(codePoint);
+            }
+            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
+            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
+            return String.fromCharCode(codeUnit1, codeUnit2);
+        }
+        // Current character is known to be a backslash. Check for Unicode escape of the form '\uXXXX'
+        // and return code point value if valid Unicode escape is found. Otherwise return -1.
+        function peekUnicodeEscape() {
+            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117 /* u */) {
+                var start_1 = pos;
+                pos += 2;
+                var value = scanExactNumberOfHexDigits(4);
+                pos = start_1;
+                return value;
+            }
+            return -1;
+        }
+        function scanIdentifierParts() {
+            var result = "";
+            var start = pos;
+            while (pos < end) {
+                var ch = text.charCodeAt(pos);
+                if (isIdentifierPart(ch, languageVersion)) {
+                    pos++;
+                }
+                else if (ch === 92 /* backslash */) {
+                    ch = peekUnicodeEscape();
+                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
+                        break;
+                    }
+                    result += text.substring(start, pos);
+                    result += String.fromCharCode(ch);
+                    // Valid Unicode escape is always six characters
+                    pos += 6;
+                    start = pos;
+                }
+                else {
+                    break;
+                }
+            }
+            result += text.substring(start, pos);
+            return result;
+        }
+        function getIdentifierToken() {
+            // Reserved words are between 2 and 11 characters long and start with a lowercase letter
+            var len = tokenValue.length;
+            if (len >= 2 && len <= 11) {
+                var ch = tokenValue.charCodeAt(0);
+                if (ch >= 97 /* a */ && ch <= 122 /* z */ && hasOwnProperty.call(textToToken, tokenValue)) {
+                    return token = textToToken[tokenValue];
+                }
+            }
+            return token = 69 /* Identifier */;
+        }
+        function scanBinaryOrOctalDigits(base) {
+            ts.Debug.assert(base !== 2 || base !== 8, "Expected either base 2 or base 8");
+            var value = 0;
+            // For counting number of digits; Valid binaryIntegerLiteral must have at least one binary digit following B or b.
+            // Similarly valid octalIntegerLiteral must have at least one octal digit following o or O.
+            var numberOfDigits = 0;
+            while (true) {
+                var ch = text.charCodeAt(pos);
+                var valueOfCh = ch - 48 /* _0 */;
+                if (!isDigit(ch) || valueOfCh >= base) {
+                    break;
+                }
+                value = value * base + valueOfCh;
+                pos++;
+                numberOfDigits++;
+            }
+            // Invalid binaryIntegerLiteral or octalIntegerLiteral
+            if (numberOfDigits === 0) {
+                return -1;
+            }
+            return value;
+        }
+        function scan() {
+            startPos = pos;
+            hasExtendedUnicodeEscape = false;
+            precedingLineBreak = false;
+            tokenIsUnterminated = false;
+            while (true) {
+                tokenPos = pos;
+                if (pos >= end) {
+                    return token = 1 /* EndOfFileToken */;
+                }
+                var ch = text.charCodeAt(pos);
+                // Special handling for shebang
+                if (ch === 35 /* hash */ && pos === 0 && isShebangTrivia(text, pos)) {
+                    pos = scanShebangTrivia(text, pos);
+                    if (skipTrivia) {
+                        continue;
+                    }
+                    else {
+                        return token = 6 /* ShebangTrivia */;
+                    }
+                }
+                switch (ch) {
+                    case 10 /* lineFeed */:
+                    case 13 /* carriageReturn */:
+                        precedingLineBreak = true;
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            if (ch === 13 /* carriageReturn */ && pos + 1 < end && text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                                // consume both CR and LF
+                                pos += 2;
+                            }
+                            else {
+                                pos++;
+                            }
+                            return token = 4 /* NewLineTrivia */;
+                        }
+                    case 9 /* tab */:
+                    case 11 /* verticalTab */:
+                    case 12 /* formFeed */:
+                    case 32 /* space */:
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            while (pos < end && isWhiteSpace(text.charCodeAt(pos))) {
+                                pos++;
+                            }
+                            return token = 5 /* WhitespaceTrivia */;
+                        }
+                    case 33 /* exclamation */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 33 /* ExclamationEqualsEqualsToken */;
+                            }
+                            return pos += 2, token = 31 /* ExclamationEqualsToken */;
+                        }
+                        pos++;
+                        return token = 49 /* ExclamationToken */;
+                    case 34 /* doubleQuote */:
+                    case 39 /* singleQuote */:
+                        tokenValue = scanString();
+                        return token = 9 /* StringLiteral */;
+                    case 96 /* backtick */:
+                        return token = scanTemplateAndSetTokenValue();
+                    case 37 /* percent */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 62 /* PercentEqualsToken */;
+                        }
+                        pos++;
+                        return token = 40 /* PercentToken */;
+                    case 38 /* ampersand */:
+                        if (text.charCodeAt(pos + 1) === 38 /* ampersand */) {
+                            return pos += 2, token = 51 /* AmpersandAmpersandToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 66 /* AmpersandEqualsToken */;
+                        }
+                        pos++;
+                        return token = 46 /* AmpersandToken */;
+                    case 40 /* openParen */:
+                        pos++;
+                        return token = 17 /* OpenParenToken */;
+                    case 41 /* closeParen */:
+                        pos++;
+                        return token = 18 /* CloseParenToken */;
+                    case 42 /* asterisk */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 59 /* AsteriskEqualsToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 60 /* AsteriskAsteriskEqualsToken */;
+                            }
+                            return pos += 2, token = 38 /* AsteriskAsteriskToken */;
+                        }
+                        pos++;
+                        return token = 37 /* AsteriskToken */;
+                    case 43 /* plus */:
+                        if (text.charCodeAt(pos + 1) === 43 /* plus */) {
+                            return pos += 2, token = 41 /* PlusPlusToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 57 /* PlusEqualsToken */;
+                        }
+                        pos++;
+                        return token = 35 /* PlusToken */;
+                    case 44 /* comma */:
+                        pos++;
+                        return token = 24 /* CommaToken */;
+                    case 45 /* minus */:
+                        if (text.charCodeAt(pos + 1) === 45 /* minus */) {
+                            return pos += 2, token = 42 /* MinusMinusToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 58 /* MinusEqualsToken */;
+                        }
+                        pos++;
+                        return token = 36 /* MinusToken */;
+                    case 46 /* dot */:
+                        if (isDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = scanNumber();
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 46 /* dot */ && text.charCodeAt(pos + 2) === 46 /* dot */) {
+                            return pos += 3, token = 22 /* DotDotDotToken */;
+                        }
+                        pos++;
+                        return token = 21 /* DotToken */;
+                    case 47 /* slash */:
+                        // Single-line comment
+                        if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                            pos += 2;
+                            while (pos < end) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    break;
+                                }
+                                pos++;
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 2 /* SingleLineCommentTrivia */;
+                            }
+                        }
+                        // Multi-line comment
+                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                            pos += 2;
+                            var commentClosed = false;
+                            while (pos < end) {
+                                var ch_2 = text.charCodeAt(pos);
+                                if (ch_2 === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                    pos += 2;
+                                    commentClosed = true;
+                                    break;
+                                }
+                                if (isLineBreak(ch_2)) {
+                                    precedingLineBreak = true;
+                                }
+                                pos++;
+                            }
+                            if (!commentClosed) {
+                                error(ts.Diagnostics.Asterisk_Slash_expected);
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                tokenIsUnterminated = !commentClosed;
+                                return token = 3 /* MultiLineCommentTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 61 /* SlashEqualsToken */;
+                        }
+                        pos++;
+                        return token = 39 /* SlashToken */;
+                    case 48 /* _0 */:
+                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 /* X */ || text.charCodeAt(pos + 1) === 120 /* x */)) {
+                            pos += 2;
+                            var value = scanMinimumNumberOfHexDigits(1);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 /* B */ || text.charCodeAt(pos + 1) === 98 /* b */)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(/* base */ 2);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Binary_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 /* O */ || text.charCodeAt(pos + 1) === 111 /* o */)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(/* base */ 8);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Octal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        // Try to parse as an octal
+                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = "" + scanOctalDigits();
+                            return token = 8 /* NumericLiteral */;
+                        }
+                    // This fall-through is a deviation from the EcmaScript grammar. The grammar says that a leading zero
+                    // can only be followed by an octal digit, a dot, or the end of the number literal. However, we are being
+                    // permissive and allowing decimal digits of the form 08* and 09* (which many browsers also do).
+                    case 49 /* _1 */:
+                    case 50 /* _2 */:
+                    case 51 /* _3 */:
+                    case 52 /* _4 */:
+                    case 53 /* _5 */:
+                    case 54 /* _6 */:
+                    case 55 /* _7 */:
+                    case 56 /* _8 */:
+                    case 57 /* _9 */:
+                        tokenValue = scanNumber();
+                        return token = 8 /* NumericLiteral */;
+                    case 58 /* colon */:
+                        pos++;
+                        return token = 54 /* ColonToken */;
+                    case 59 /* semicolon */:
+                        pos++;
+                        return token = 23 /* SemicolonToken */;
+                    case 60 /* lessThan */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 60 /* lessThan */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 63 /* LessThanLessThanEqualsToken */;
+                            }
+                            return pos += 2, token = 43 /* LessThanLessThanToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 28 /* LessThanEqualsToken */;
+                        }
+                        if (languageVariant === 1 /* JSX */ &&
+                            text.charCodeAt(pos + 1) === 47 /* slash */ &&
+                            text.charCodeAt(pos + 2) !== 42 /* asterisk */) {
+                            return pos += 2, token = 26 /* LessThanSlashToken */;
+                        }
+                        pos++;
+                        return token = 25 /* LessThanToken */;
+                    case 61 /* equals */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 32 /* EqualsEqualsEqualsToken */;
+                            }
+                            return pos += 2, token = 30 /* EqualsEqualsToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
+                            return pos += 2, token = 34 /* EqualsGreaterThanToken */;
+                        }
+                        pos++;
+                        return token = 56 /* EqualsToken */;
+                    case 62 /* greaterThan */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        pos++;
+                        return token = 27 /* GreaterThanToken */;
+                    case 63 /* question */:
+                        pos++;
+                        return token = 53 /* QuestionToken */;
+                    case 91 /* openBracket */:
+                        pos++;
+                        return token = 19 /* OpenBracketToken */;
+                    case 93 /* closeBracket */:
+                        pos++;
+                        return token = 20 /* CloseBracketToken */;
+                    case 94 /* caret */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 68 /* CaretEqualsToken */;
+                        }
+                        pos++;
+                        return token = 48 /* CaretToken */;
+                    case 123 /* openBrace */:
+                        pos++;
+                        return token = 15 /* OpenBraceToken */;
+                    case 124 /* bar */:
+                        if (text.charCodeAt(pos + 1) === 124 /* bar */) {
+                            return pos += 2, token = 52 /* BarBarToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 67 /* BarEqualsToken */;
+                        }
+                        pos++;
+                        return token = 47 /* BarToken */;
+                    case 125 /* closeBrace */:
+                        pos++;
+                        return token = 16 /* CloseBraceToken */;
+                    case 126 /* tilde */:
+                        pos++;
+                        return token = 50 /* TildeToken */;
+                    case 64 /* at */:
+                        pos++;
+                        return token = 55 /* AtToken */;
+                    case 92 /* backslash */:
+                        var cookedChar = peekUnicodeEscape();
+                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
+                            pos += 6;
+                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
+                            return token = getIdentifierToken();
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0 /* Unknown */;
+                    default:
+                        if (isIdentifierStart(ch, languageVersion)) {
+                            pos++;
+                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
+                                pos++;
+                            tokenValue = text.substring(tokenPos, pos);
+                            if (ch === 92 /* backslash */) {
+                                tokenValue += scanIdentifierParts();
+                            }
+                            return token = getIdentifierToken();
+                        }
+                        else if (isWhiteSpace(ch)) {
+                            pos++;
+                            continue;
+                        }
+                        else if (isLineBreak(ch)) {
+                            precedingLineBreak = true;
+                            pos++;
+                            continue;
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0 /* Unknown */;
+                }
+            }
+        }
+        function reScanGreaterToken() {
+            if (token === 27 /* GreaterThanToken */) {
+                if (text.charCodeAt(pos) === 62 /* greaterThan */) {
+                    if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
+                        if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                            return pos += 3, token = 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */;
+                        }
+                        return pos += 2, token = 45 /* GreaterThanGreaterThanGreaterThanToken */;
+                    }
+                    if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                        return pos += 2, token = 64 /* GreaterThanGreaterThanEqualsToken */;
+                    }
+                    pos++;
+                    return token = 44 /* GreaterThanGreaterThanToken */;
+                }
+                if (text.charCodeAt(pos) === 61 /* equals */) {
+                    pos++;
+                    return token = 29 /* GreaterThanEqualsToken */;
+                }
+            }
+            return token;
+        }
+        function reScanSlashToken() {
+            if (token === 39 /* SlashToken */ || token === 61 /* SlashEqualsToken */) {
+                var p = tokenPos + 1;
+                var inEscape = false;
+                var inCharacterClass = false;
+                while (true) {
+                    // If we reach the end of a file, or hit a newline, then this is an unterminated
+                    // regex.  Report error and return what we have so far.
+                    if (p >= end) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    var ch = text.charCodeAt(p);
+                    if (isLineBreak(ch)) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    if (inEscape) {
+                        // Parsing an escape character;
+                        // reset the flag and just advance to the next char.
+                        inEscape = false;
+                    }
+                    else if (ch === 47 /* slash */ && !inCharacterClass) {
+                        // A slash within a character class is permissible,
+                        // but in general it signals the end of the regexp literal.
+                        p++;
+                        break;
+                    }
+                    else if (ch === 91 /* openBracket */) {
+                        inCharacterClass = true;
+                    }
+                    else if (ch === 92 /* backslash */) {
+                        inEscape = true;
+                    }
+                    else if (ch === 93 /* closeBracket */) {
+                        inCharacterClass = false;
+                    }
+                    p++;
+                }
+                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
+                    p++;
+                }
+                pos = p;
+                tokenValue = text.substring(tokenPos, pos);
+                token = 10 /* RegularExpressionLiteral */;
+            }
+            return token;
+        }
+        /**
+         * Unconditionally back up and scan a template expression portion.
+         */
+        function reScanTemplateToken() {
+            ts.Debug.assert(token === 16 /* CloseBraceToken */, "'reScanTemplateToken' should only be called on a '}'");
+            pos = tokenPos;
+            return token = scanTemplateAndSetTokenValue();
+        }
+        function reScanJsxToken() {
+            pos = tokenPos = startPos;
+            return token = scanJsxToken();
+        }
+        function scanJsxToken() {
+            startPos = tokenPos = pos;
+            if (pos >= end) {
+                return token = 1 /* EndOfFileToken */;
+            }
+            var char = text.charCodeAt(pos);
+            if (char === 60 /* lessThan */) {
+                if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                    pos += 2;
+                    return token = 26 /* LessThanSlashToken */;
+                }
+                pos++;
+                return token = 25 /* LessThanToken */;
+            }
+            if (char === 123 /* openBrace */) {
+                pos++;
+                return token = 15 /* OpenBraceToken */;
+            }
+            while (pos < end) {
+                pos++;
+                char = text.charCodeAt(pos);
+                if ((char === 123 /* openBrace */) || (char === 60 /* lessThan */)) {
+                    break;
+                }
+            }
+            return token = 244 /* JsxText */;
+        }
+        // Scans a JSX identifier; these differ from normal identifiers in that
+        // they allow dashes
+        function scanJsxIdentifier() {
+            if (tokenIsIdentifierOrKeyword(token)) {
+                var firstCharPosition = pos;
+                while (pos < end) {
+                    var ch = text.charCodeAt(pos);
+                    if (ch === 45 /* minus */ || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
+                        pos++;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
+            }
+            return token;
+        }
+        function scanJSDocToken() {
+            if (pos >= end) {
+                return token = 1 /* EndOfFileToken */;
+            }
+            startPos = pos;
+            // Eat leading whitespace
+            var ch = text.charCodeAt(pos);
+            while (pos < end) {
+                ch = text.charCodeAt(pos);
+                if (isWhiteSpace(ch)) {
+                    pos++;
+                }
+                else {
+                    break;
+                }
+            }
+            tokenPos = pos;
+            switch (ch) {
+                case 64 /* at */:
+                    return pos += 1, token = 55 /* AtToken */;
+                case 10 /* lineFeed */:
+                case 13 /* carriageReturn */:
+                    return pos += 1, token = 4 /* NewLineTrivia */;
+                case 42 /* asterisk */:
+                    return pos += 1, token = 37 /* AsteriskToken */;
+                case 123 /* openBrace */:
+                    return pos += 1, token = 15 /* OpenBraceToken */;
+                case 125 /* closeBrace */:
+                    return pos += 1, token = 16 /* CloseBraceToken */;
+                case 91 /* openBracket */:
+                    return pos += 1, token = 19 /* OpenBracketToken */;
+                case 93 /* closeBracket */:
+                    return pos += 1, token = 20 /* CloseBracketToken */;
+                case 61 /* equals */:
+                    return pos += 1, token = 56 /* EqualsToken */;
+                case 44 /* comma */:
+                    return pos += 1, token = 24 /* CommaToken */;
+            }
+            if (isIdentifierStart(ch, 2 /* Latest */)) {
+                pos++;
+                while (isIdentifierPart(text.charCodeAt(pos), 2 /* Latest */) && pos < end) {
+                    pos++;
+                }
+                return token = 69 /* Identifier */;
+            }
+            else {
+                return pos += 1, token = 0 /* Unknown */;
+            }
+        }
+        function speculationHelper(callback, isLookahead) {
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var saveTokenValue = tokenValue;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var result = callback();
+            // If our callback returned something 'falsy' or we're just looking ahead,
+            // then unconditionally restore us to where we were.
+            if (!result || isLookahead) {
+                pos = savePos;
+                startPos = saveStartPos;
+                tokenPos = saveTokenPos;
+                token = saveToken;
+                tokenValue = saveTokenValue;
+                precedingLineBreak = savePrecedingLineBreak;
+            }
+            return result;
+        }
+        function scanRange(start, length, callback) {
+            var saveEnd = end;
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var saveTokenValue = tokenValue;
+            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
+            var saveTokenIsUnterminated = tokenIsUnterminated;
+            setText(text, start, length);
+            var result = callback();
+            end = saveEnd;
+            pos = savePos;
+            startPos = saveStartPos;
+            tokenPos = saveTokenPos;
+            token = saveToken;
+            precedingLineBreak = savePrecedingLineBreak;
+            tokenValue = saveTokenValue;
+            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
+            tokenIsUnterminated = saveTokenIsUnterminated;
+            return result;
+        }
+        function lookAhead(callback) {
+            return speculationHelper(callback, /*isLookahead*/ true);
+        }
+        function tryScan(callback) {
+            return speculationHelper(callback, /*isLookahead*/ false);
+        }
+        function setText(newText, start, length) {
+            text = newText || "";
+            end = length === undefined ? text.length : start + length;
+            setTextPos(start || 0);
+        }
+        function setOnError(errorCallback) {
+            onError = errorCallback;
+        }
+        function setScriptTarget(scriptTarget) {
+            languageVersion = scriptTarget;
+        }
+        function setLanguageVariant(variant) {
+            languageVariant = variant;
+        }
+        function setTextPos(textPos) {
+            ts.Debug.assert(textPos >= 0);
+            pos = textPos;
+            startPos = textPos;
+            tokenPos = textPos;
+            token = 0 /* Unknown */;
+            precedingLineBreak = false;
+            tokenValue = undefined;
+            hasExtendedUnicodeEscape = false;
+            tokenIsUnterminated = false;
+        }
+    }
+    ts.createScanner = createScanner;
+})(ts || (ts = {}));
+/// <reference path="sys.ts" />
+/* @internal */
+var ts;
+(function (ts) {
+    function getDeclarationOfKind(symbol, kind) {
+        var declarations = symbol.declarations;
+        if (declarations) {
+            for (var _i = 0, declarations_1 = declarations; _i < declarations_1.length; _i++) {
+                var declaration = declarations_1[_i];
+                if (declaration.kind === kind) {
+                    return declaration;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getDeclarationOfKind = getDeclarationOfKind;
+    // Pool writers to avoid needing to allocate them for every symbol we write.
+    var stringWriters = [];
+    function getSingleLineStringWriter() {
+        if (stringWriters.length === 0) {
+            var str_1 = "";
+            var writeText = function (text) { return str_1 += text; };
+            return {
+                string: function () { return str_1; },
+                writeKeyword: writeText,
+                writeOperator: writeText,
+                writePunctuation: writeText,
+                writeSpace: writeText,
+                writeStringLiteral: writeText,
+                writeParameter: writeText,
+                writeSymbol: writeText,
+                // Completely ignore indentation for string writers.  And map newlines to
+                // a single space.
+                writeLine: function () { return str_1 += " "; },
+                increaseIndent: function () { },
+                decreaseIndent: function () { },
+                clear: function () { return str_1 = ""; },
+                trackSymbol: function () { },
+                reportInaccessibleThisError: function () { }
+            };
+        }
+        return stringWriters.pop();
+    }
+    ts.getSingleLineStringWriter = getSingleLineStringWriter;
+    function releaseStringWriter(writer) {
+        writer.clear();
+        stringWriters.push(writer);
+    }
+    ts.releaseStringWriter = releaseStringWriter;
+    function getFullWidth(node) {
+        return node.end - node.pos;
+    }
+    ts.getFullWidth = getFullWidth;
+    function mapIsEqualTo(map1, map2) {
+        if (!map1 || !map2) {
+            return map1 === map2;
+        }
+        return containsAll(map1, map2) && containsAll(map2, map1);
+    }
+    ts.mapIsEqualTo = mapIsEqualTo;
+    function containsAll(map, other) {
+        for (var key in map) {
+            if (!ts.hasProperty(map, key)) {
+                continue;
+            }
+            if (!ts.hasProperty(other, key) || map[key] !== other[key]) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function arrayIsEqualTo(array1, array2, equaler) {
+        if (!array1 || !array2) {
+            return array1 === array2;
+        }
+        if (array1.length !== array2.length) {
+            return false;
+        }
+        for (var i = 0; i < array1.length; i++) {
+            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
+            if (!equals) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.arrayIsEqualTo = arrayIsEqualTo;
+    function hasResolvedModule(sourceFile, moduleNameText) {
+        return sourceFile.resolvedModules && ts.hasProperty(sourceFile.resolvedModules, moduleNameText);
+    }
+    ts.hasResolvedModule = hasResolvedModule;
+    function getResolvedModule(sourceFile, moduleNameText) {
+        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
+    }
+    ts.getResolvedModule = getResolvedModule;
+    function setResolvedModule(sourceFile, moduleNameText, resolvedModule) {
+        if (!sourceFile.resolvedModules) {
+            sourceFile.resolvedModules = {};
+        }
+        sourceFile.resolvedModules[moduleNameText] = resolvedModule;
+    }
+    ts.setResolvedModule = setResolvedModule;
+    function setResolvedTypeReferenceDirective(sourceFile, typeReferenceDirectiveName, resolvedTypeReferenceDirective) {
+        if (!sourceFile.resolvedTypeReferenceDirectiveNames) {
+            sourceFile.resolvedTypeReferenceDirectiveNames = {};
+        }
+        sourceFile.resolvedTypeReferenceDirectiveNames[typeReferenceDirectiveName] = resolvedTypeReferenceDirective;
+    }
+    ts.setResolvedTypeReferenceDirective = setResolvedTypeReferenceDirective;
+    /* @internal */
+    function moduleResolutionIsEqualTo(oldResolution, newResolution) {
+        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport;
+    }
+    ts.moduleResolutionIsEqualTo = moduleResolutionIsEqualTo;
+    /* @internal */
+    function typeDirectiveIsEqualTo(oldResolution, newResolution) {
+        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.primary === newResolution.primary;
+    }
+    ts.typeDirectiveIsEqualTo = typeDirectiveIsEqualTo;
+    /* @internal */
+    function hasChangesInResolutions(names, newResolutions, oldResolutions, comparer) {
+        if (names.length !== newResolutions.length) {
+            return false;
+        }
+        for (var i = 0; i < names.length; i++) {
+            var newResolution = newResolutions[i];
+            var oldResolution = oldResolutions && ts.hasProperty(oldResolutions, names[i]) ? oldResolutions[names[i]] : undefined;
+            var changed = oldResolution
+                ? !newResolution || !comparer(oldResolution, newResolution)
+                : newResolution;
+            if (changed) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.hasChangesInResolutions = hasChangesInResolutions;
+    // Returns true if this node contains a parse error anywhere underneath it.
+    function containsParseError(node) {
+        aggregateChildData(node);
+        return (node.flags & 268435456 /* ThisNodeOrAnySubNodesHasError */) !== 0;
+    }
+    ts.containsParseError = containsParseError;
+    function aggregateChildData(node) {
+        if (!(node.flags & 536870912 /* HasAggregatedChildData */)) {
+            // A node is considered to contain a parse error if:
+            //  a) the parser explicitly marked that it had an error
+            //  b) any of it's children reported that it had an error.
+            var thisNodeOrAnySubNodesHasError = ((node.flags & 67108864 /* ThisNodeHasError */) !== 0) ||
+                ts.forEachChild(node, containsParseError);
+            // If so, mark ourselves accordingly.
+            if (thisNodeOrAnySubNodesHasError) {
+                node.flags |= 268435456 /* ThisNodeOrAnySubNodesHasError */;
+            }
+            // Also mark that we've propagated the child information to this node.  This way we can
+            // always consult the bit directly on this node without needing to check its children
+            // again.
+            node.flags |= 536870912 /* HasAggregatedChildData */;
+        }
+    }
+    function getSourceFileOfNode(node) {
+        while (node && node.kind !== 256 /* SourceFile */) {
+            node = node.parent;
+        }
+        return node;
+    }
+    ts.getSourceFileOfNode = getSourceFileOfNode;
+    function isStatementWithLocals(node) {
+        switch (node.kind) {
+            case 199 /* Block */:
+            case 227 /* CaseBlock */:
+            case 206 /* ForStatement */:
+            case 207 /* ForInStatement */:
+            case 208 /* ForOfStatement */:
+                return true;
+        }
+        return false;
+    }
+    ts.isStatementWithLocals = isStatementWithLocals;
+    function getStartPositionOfLine(line, sourceFile) {
+        ts.Debug.assert(line >= 0);
+        return ts.getLineStarts(sourceFile)[line];
+    }
+    ts.getStartPositionOfLine = getStartPositionOfLine;
+    // This is a useful function for debugging purposes.
+    function nodePosToString(node) {
+        var file = getSourceFileOfNode(node);
+        var loc = ts.getLineAndCharacterOfPosition(file, node.pos);
+        return file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + ")";
+    }
+    ts.nodePosToString = nodePosToString;
+    function getStartPosOfNode(node) {
+        return node.pos;
+    }
+    ts.getStartPosOfNode = getStartPosOfNode;
+    function getEndLinePosition(line, sourceFile) {
+        ts.Debug.assert(line >= 0);
+        var lineStarts = ts.getLineStarts(sourceFile);
+        var lineIndex = line;
+        var sourceText = sourceFile.text;
+        if (lineIndex + 1 === lineStarts.length) {
+            // last line - return EOF
+            return sourceText.length - 1;
+        }
+        else {
+            // current line start
+            var start = lineStarts[lineIndex];
+            // take the start position of the next line - 1 = it should be some line break
+            var pos = lineStarts[lineIndex + 1] - 1;
+            ts.Debug.assert(ts.isLineBreak(sourceText.charCodeAt(pos)));
+            // walk backwards skipping line breaks, stop the the beginning of current line.
+            // i.e:
+            // <some text>
+            // $ <- end of line for this position should match the start position
+            while (start <= pos && ts.isLineBreak(sourceText.charCodeAt(pos))) {
+                pos--;
+            }
+            return pos;
+        }
+    }
+    ts.getEndLinePosition = getEndLinePosition;
+    // Returns true if this node is missing from the actual source code. A 'missing' node is different
+    // from 'undefined/defined'. When a node is undefined (which can happen for optional nodes
+    // in the tree), it is definitely missing. However, a node may be defined, but still be
+    // missing.  This happens whenever the parser knows it needs to parse something, but can't
+    // get anything in the source code that it expects at that location. For example:
+    //
+    //          let a: ;
+    //
+    // Here, the Type in the Type-Annotation is not-optional (as there is a colon in the source
+    // code). So the parser will attempt to parse out a type, and will create an actual node.
+    // However, this node will be 'missing' in the sense that no actual source-code/tokens are
+    // contained within it.
+    function nodeIsMissing(node) {
+        if (!node) {
+            return true;
+        }
+        return node.pos === node.end && node.pos >= 0 && node.kind !== 1 /* EndOfFileToken */;
+    }
+    ts.nodeIsMissing = nodeIsMissing;
+    function nodeIsPresent(node) {
+        return !nodeIsMissing(node);
+    }
+    ts.nodeIsPresent = nodeIsPresent;
+    function getTokenPosOfNode(node, sourceFile, includeJsDocComment) {
+        // With nodes that have no width (i.e. 'Missing' nodes), we actually *don't*
+        // want to skip trivia because this will launch us forward to the next token.
+        if (nodeIsMissing(node)) {
+            return node.pos;
+        }
+        if (isJSDocNode(node)) {
+            return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos, /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
+        }
+        if (includeJsDocComment && node.jsDocComments && node.jsDocComments.length > 0) {
+            return getTokenPosOfNode(node.jsDocComments[0]);
+        }
+        // For a syntax list, it is possible that one of its children has JSDocComment nodes, while
+        // the syntax list itself considers them as normal trivia. Therefore if we simply skip
+        // trivia for the list, we may have skipped the JSDocComment as well. So we should process its
+        // first child to determine the actual position of its first token.
+        if (node.kind === 282 /* SyntaxList */ && node._children.length > 0) {
+            return getTokenPosOfNode(node._children[0], sourceFile, includeJsDocComment);
+        }
+        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
+    }
+    ts.getTokenPosOfNode = getTokenPosOfNode;
+    function isJSDocNode(node) {
+        return node.kind >= 257 /* FirstJSDocNode */ && node.kind <= 281 /* LastJSDocNode */;
+    }
+    ts.isJSDocNode = isJSDocNode;
+    function getNonDecoratorTokenPosOfNode(node, sourceFile) {
+        if (nodeIsMissing(node) || !node.decorators) {
+            return getTokenPosOfNode(node, sourceFile);
+        }
+        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.decorators.end);
+    }
+    ts.getNonDecoratorTokenPosOfNode = getNonDecoratorTokenPosOfNode;
+    function getSourceTextOfNodeFromSourceFile(sourceFile, node, includeTrivia) {
+        if (includeTrivia === void 0) { includeTrivia = false; }
+        if (nodeIsMissing(node)) {
+            return "";
+        }
+        var text = sourceFile.text;
+        return text.substring(includeTrivia ? node.pos : ts.skipTrivia(text, node.pos), node.end);
+    }
+    ts.getSourceTextOfNodeFromSourceFile = getSourceTextOfNodeFromSourceFile;
+    function getTextOfNodeFromSourceText(sourceText, node) {
+        if (nodeIsMissing(node)) {
+            return "";
+        }
+        return sourceText.substring(ts.skipTrivia(sourceText, node.pos), node.end);
+    }
+    ts.getTextOfNodeFromSourceText = getTextOfNodeFromSourceText;
+    function getTextOfNode(node, includeTrivia) {
+        if (includeTrivia === void 0) { includeTrivia = false; }
+        return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
+    }
+    ts.getTextOfNode = getTextOfNode;
+    // Add an extra underscore to identifiers that start with two underscores to avoid issues with magic names like '__proto__'
+    function escapeIdentifier(identifier) {
+        return identifier.length >= 2 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ ? "_" + identifier : identifier;
+    }
+    ts.escapeIdentifier = escapeIdentifier;
+    // Remove extra underscore from escaped identifier
+    function unescapeIdentifier(identifier) {
+        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ && identifier.charCodeAt(2) === 95 /* _ */ ? identifier.substr(1) : identifier;
+    }
+    ts.unescapeIdentifier = unescapeIdentifier;
+    // Make an identifier from an external module name by extracting the string after the last "/" and replacing
+    // all non-alphanumeric characters with underscores
+    function makeIdentifierFromModuleName(moduleName) {
+        return ts.getBaseFileName(moduleName).replace(/^(\d)/, "_$1").replace(/\W/g, "_");
+    }
+    ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
+    function isBlockOrCatchScoped(declaration) {
+        return (getCombinedNodeFlags(declaration) & 3072 /* BlockScoped */) !== 0 ||
+            isCatchClauseVariableDeclaration(declaration);
+    }
+    ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
+    function isAmbientModule(node) {
+        return node && node.kind === 225 /* ModuleDeclaration */ &&
+            (node.name.kind === 9 /* StringLiteral */ || isGlobalScopeAugmentation(node));
+    }
+    ts.isAmbientModule = isAmbientModule;
+    function isBlockScopedContainerTopLevel(node) {
+        return node.kind === 256 /* SourceFile */ ||
+            node.kind === 225 /* ModuleDeclaration */ ||
+            isFunctionLike(node) ||
+            isFunctionBlock(node);
+    }
+    ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
+    function isGlobalScopeAugmentation(module) {
+        return !!(module.flags & 131072 /* GlobalAugmentation */);
+    }
+    ts.isGlobalScopeAugmentation = isGlobalScopeAugmentation;
+    function isExternalModuleAugmentation(node) {
+        // external module augmentation is a ambient module declaration that is either:
+        // - defined in the top level scope and source file is an external module
+        // - defined inside ambient module declaration located in the top level scope and source file not an external module
+        if (!node || !isAmbientModule(node)) {
+            return false;
+        }
+        switch (node.parent.kind) {
+            case 256 /* SourceFile */:
+                return ts.isExternalModule(node.parent);
+            case 226 /* ModuleBlock */:
+                return isAmbientModule(node.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
+        }
+        return false;
+    }
+    ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
+    // Gets the nearest enclosing block scope container that has the provided node
+    // as a descendant, that is not the provided node.
+    function getEnclosingBlockScopeContainer(node) {
+        var current = node.parent;
+        while (current) {
+            if (isFunctionLike(current)) {
+                return current;
+            }
+            switch (current.kind) {
+                case 256 /* SourceFile */:
+                case 227 /* CaseBlock */:
+                case 252 /* CatchClause */:
+                case 225 /* ModuleDeclaration */:
+                case 206 /* ForStatement */:
+                case 207 /* ForInStatement */:
+                case 208 /* ForOfStatement */:
+                    return current;
+                case 199 /* Block */:
+                    // function block is not considered block-scope container
+                    // see comment in binder.ts: bind(...), case for SyntaxKind.Block
+                    if (!isFunctionLike(current.parent)) {
+                        return current;
+                    }
+            }
+            current = current.parent;
+        }
+    }
+    ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
+    function isCatchClauseVariableDeclaration(declaration) {
+        return declaration &&
+            declaration.kind === 218 /* VariableDeclaration */ &&
+            declaration.parent &&
+            declaration.parent.kind === 252 /* CatchClause */;
+    }
+    ts.isCatchClauseVariableDeclaration = isCatchClauseVariableDeclaration;
+    // Return display name of an identifier
+    // Computed property names will just be emitted as "[<expr>]", where <expr> is the source
+    // text of the expression in the computed property.
+    function declarationNameToString(name) {
+        return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
+    }
+    ts.declarationNameToString = declarationNameToString;
+    function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
+        var sourceFile = getSourceFileOfNode(node);
+        var span = getErrorSpanForNode(sourceFile, node);
+        return ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2);
+    }
+    ts.createDiagnosticForNode = createDiagnosticForNode;
+    function createDiagnosticForNodeFromMessageChain(node, messageChain) {
+        var sourceFile = getSourceFileOfNode(node);
+        var span = getErrorSpanForNode(sourceFile, node);
+        return {
+            file: sourceFile,
+            start: span.start,
+            length: span.length,
+            code: messageChain.code,
+            category: messageChain.category,
+            messageText: messageChain.next ? messageChain : messageChain.messageText
+        };
+    }
+    ts.createDiagnosticForNodeFromMessageChain = createDiagnosticForNodeFromMessageChain;
+    function getSpanOfTokenAtPosition(sourceFile, pos) {
+        var scanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ true, sourceFile.languageVariant, sourceFile.text, /*onError:*/ undefined, pos);
+        scanner.scan();
+        var start = scanner.getTokenPos();
+        return ts.createTextSpanFromBounds(start, scanner.getTextPos());
+    }
+    ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
+    function getErrorSpanForArrowFunction(sourceFile, node) {
+        var pos = ts.skipTrivia(sourceFile.text, node.pos);
+        if (node.body && node.body.kind === 199 /* Block */) {
+            var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
+            var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
+            if (startLine < endLine) {
+                // The arrow function spans multiple lines,
+                // make the error span be the first line, inclusive.
+                return ts.createTextSpan(pos, getEndLinePosition(startLine, sourceFile) - pos + 1);
+            }
+        }
+        return ts.createTextSpanFromBounds(pos, node.end);
+    }
+    function getErrorSpanForNode(sourceFile, node) {
+        var errorNode = node;
+        switch (node.kind) {
+            case 256 /* SourceFile */:
+                var pos_1 = ts.skipTrivia(sourceFile.text, 0, /*stopAfterLineBreak*/ false);
+                if (pos_1 === sourceFile.text.length) {
+                    // file is empty - return span for the beginning of the file
+                    return ts.createTextSpan(0, 0);
+                }
+                return getSpanOfTokenAtPosition(sourceFile, pos_1);
+            // This list is a work in progress. Add missing node kinds to improve their error
+            // spans.
+            case 218 /* VariableDeclaration */:
+            case 169 /* BindingElement */:
+            case 221 /* ClassDeclaration */:
+            case 192 /* ClassExpression */:
+            case 222 /* InterfaceDeclaration */:
+            case 225 /* ModuleDeclaration */:
+            case 224 /* EnumDeclaration */:
+            case 255 /* EnumMember */:
+            case 220 /* FunctionDeclaration */:
+            case 179 /* FunctionExpression */:
+            case 147 /* MethodDeclaration */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 223 /* TypeAliasDeclaration */:
+                errorNode = node.name;
+                break;
+            case 180 /* ArrowFunction */:
+                return getErrorSpanForArrowFunction(sourceFile, node);
+        }
+        if (errorNode === undefined) {
+            // If we don't have a better node, then just set the error on the first token of
+            // construct.
+            return getSpanOfTokenAtPosition(sourceFile, node.pos);
+        }
+        var pos = nodeIsMissing(errorNode)
+            ? errorNode.pos
+            : ts.skipTrivia(sourceFile.text, errorNode.pos);
+        return ts.createTextSpanFromBounds(pos, errorNode.end);
+    }
+    ts.getErrorSpanForNode = getErrorSpanForNode;
+    function isExternalOrCommonJsModule(file) {
+        return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
+    }
+    ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
+    function isDeclarationFile(file) {
+        return file.isDeclarationFile;
+    }
+    ts.isDeclarationFile = isDeclarationFile;
+    function isConstEnumDeclaration(node) {
+        return node.kind === 224 /* EnumDeclaration */ && isConst(node);
+    }
+    ts.isConstEnumDeclaration = isConstEnumDeclaration;
+    function walkUpBindingElementsAndPatterns(node) {
+        while (node && (node.kind === 169 /* BindingElement */ || isBindingPattern(node))) {
+            node = node.parent;
+        }
+        return node;
+    }
+    // Returns the node flags for this node and all relevant parent nodes.  This is done so that
+    // nodes like variable declarations and binding elements can returned a view of their flags
+    // that includes the modifiers from their container.  i.e. flags like export/declare aren't
+    // stored on the variable declaration directly, but on the containing variable statement
+    // (if it has one).  Similarly, flags for let/const are store on the variable declaration
+    // list.  By calling this function, all those flags are combined so that the client can treat
+    // the node as if it actually had those flags.
+    function getCombinedNodeFlags(node) {
+        node = walkUpBindingElementsAndPatterns(node);
+        var flags = node.flags;
+        if (node.kind === 218 /* VariableDeclaration */) {
+            node = node.parent;
+        }
+        if (node && node.kind === 219 /* VariableDeclarationList */) {
+            flags |= node.flags;
+            node = node.parent;
+        }
+        if (node && node.kind === 200 /* VariableStatement */) {
+            flags |= node.flags;
+        }
+        return flags;
+    }
+    ts.getCombinedNodeFlags = getCombinedNodeFlags;
+    function isConst(node) {
+        return !!(getCombinedNodeFlags(node) & 2048 /* Const */);
+    }
+    ts.isConst = isConst;
+    function isLet(node) {
+        return !!(getCombinedNodeFlags(node) & 1024 /* Let */);
+    }
+    ts.isLet = isLet;
+    function isSuperCallExpression(n) {
+        return n.kind === 174 /* CallExpression */ && n.expression.kind === 95 /* SuperKeyword */;
+    }
+    ts.isSuperCallExpression = isSuperCallExpression;
+    function isPrologueDirective(node) {
+        return node.kind === 202 /* ExpressionStatement */ && node.expression.kind === 9 /* StringLiteral */;
+    }
+    ts.isPrologueDirective = isPrologueDirective;
+    function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
+        return ts.getLeadingCommentRanges(sourceFileOfNode.text, node.pos);
+    }
+    ts.getLeadingCommentRangesOfNode = getLeadingCommentRangesOfNode;
+    function getLeadingCommentRangesOfNodeFromText(node, text) {
+        return ts.getLeadingCommentRanges(text, node.pos);
+    }
+    ts.getLeadingCommentRangesOfNodeFromText = getLeadingCommentRangesOfNodeFromText;
+    function getJsDocComments(node, sourceFileOfNode) {
+        return getJsDocCommentsFromText(node, sourceFileOfNode.text);
+    }
+    ts.getJsDocComments = getJsDocComments;
+    function getJsDocCommentsFromText(node, text) {
+        var commentRanges = (node.kind === 142 /* Parameter */ ||
+            node.kind === 141 /* TypeParameter */ ||
+            node.kind === 179 /* FunctionExpression */ ||
+            node.kind === 180 /* ArrowFunction */) ?
+            ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
+            getLeadingCommentRangesOfNodeFromText(node, text);
+        return ts.filter(commentRanges, isJsDocComment);
+        function isJsDocComment(comment) {
+            // True if the comment starts with '/**' but not if it is '/**/'
+            return text.charCodeAt(comment.pos + 1) === 42 /* asterisk */ &&
+                text.charCodeAt(comment.pos + 2) === 42 /* asterisk */ &&
+                text.charCodeAt(comment.pos + 3) !== 47 /* slash */;
+        }
+    }
+    ts.getJsDocCommentsFromText = getJsDocCommentsFromText;
+    ts.fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
+    ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx = /^(\/\/\/\s*<reference\s+types\s*=\s*)('|")(.+?)\2.*?\/>/;
+    ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
+    function isTypeNode(node) {
+        if (154 /* FirstTypeNode */ <= node.kind && node.kind <= 166 /* LastTypeNode */) {
+            return true;
+        }
+        switch (node.kind) {
+            case 117 /* AnyKeyword */:
+            case 130 /* NumberKeyword */:
+            case 132 /* StringKeyword */:
+            case 120 /* BooleanKeyword */:
+            case 133 /* SymbolKeyword */:
+            case 135 /* UndefinedKeyword */:
+            case 127 /* NeverKeyword */:
+                return true;
+            case 103 /* VoidKeyword */:
+                return node.parent.kind !== 183 /* VoidExpression */;
+            case 194 /* ExpressionWithTypeArguments */:
+                return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
+            // Identifiers and qualified names may be type nodes, depending on their context. Climb
+            // above them to find the lowest container
+            case 69 /* Identifier */:
+                // If the identifier is the RHS of a qualified name, then it's a type iff its parent is.
+                if (node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node) {
+                    node = node.parent;
+                }
+                else if (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node) {
+                    node = node.parent;
+                }
+                // At this point, node is either a qualified name or an identifier
+                ts.Debug.assert(node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */ || node.kind === 172 /* PropertyAccessExpression */, "'node' was expected to be a qualified name, identifier or property access in 'isTypeNode'.");
+            case 139 /* QualifiedName */:
+            case 172 /* PropertyAccessExpression */:
+            case 97 /* ThisKeyword */:
+                var parent_1 = node.parent;
+                if (parent_1.kind === 158 /* TypeQuery */) {
+                    return false;
+                }
+                // Do not recursively call isTypeNode on the parent. In the example:
+                //
+                //     let a: A.B.C;
+                //
+                // Calling isTypeNode would consider the qualified name A.B a type node. Only C or
+                // A.B.C is a type node.
+                if (154 /* FirstTypeNode */ <= parent_1.kind && parent_1.kind <= 166 /* LastTypeNode */) {
+                    return true;
+                }
+                switch (parent_1.kind) {
+                    case 194 /* ExpressionWithTypeArguments */:
+                        return !isExpressionWithTypeArgumentsInClassExtendsClause(parent_1);
+                    case 141 /* TypeParameter */:
+                        return node === parent_1.constraint;
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                    case 142 /* Parameter */:
+                    case 218 /* VariableDeclaration */:
+                        return node === parent_1.type;
+                    case 220 /* FunctionDeclaration */:
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 148 /* Constructor */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        return node === parent_1.type;
+                    case 151 /* CallSignature */:
+                    case 152 /* ConstructSignature */:
+                    case 153 /* IndexSignature */:
+                        return node === parent_1.type;
+                    case 177 /* TypeAssertionExpression */:
+                        return node === parent_1.type;
+                    case 174 /* CallExpression */:
+                    case 175 /* NewExpression */:
+                        return parent_1.typeArguments && ts.indexOf(parent_1.typeArguments, node) >= 0;
+                    case 176 /* TaggedTemplateExpression */:
+                        // TODO (drosen): TaggedTemplateExpressions may eventually support type arguments.
+                        return false;
+                }
+        }
+        return false;
+    }
+    ts.isTypeNode = isTypeNode;
+    // Warning: This has the same semantics as the forEach family of functions,
+    //          in that traversal terminates in the event that 'visitor' supplies a truthy value.
+    function forEachReturnStatement(body, visitor) {
+        return traverse(body);
+        function traverse(node) {
+            switch (node.kind) {
+                case 211 /* ReturnStatement */:
+                    return visitor(node);
+                case 227 /* CaseBlock */:
+                case 199 /* Block */:
+                case 203 /* IfStatement */:
+                case 204 /* DoStatement */:
+                case 205 /* WhileStatement */:
+                case 206 /* ForStatement */:
+                case 207 /* ForInStatement */:
+                case 208 /* ForOfStatement */:
+                case 212 /* WithStatement */:
+                case 213 /* SwitchStatement */:
+                case 249 /* CaseClause */:
+                case 250 /* DefaultClause */:
+                case 214 /* LabeledStatement */:
+                case 216 /* TryStatement */:
+                case 252 /* CatchClause */:
+                    return ts.forEachChild(node, traverse);
+            }
+        }
+    }
+    ts.forEachReturnStatement = forEachReturnStatement;
+    function forEachYieldExpression(body, visitor) {
+        return traverse(body);
+        function traverse(node) {
+            switch (node.kind) {
+                case 190 /* YieldExpression */:
+                    visitor(node);
+                    var operand = node.expression;
+                    if (operand) {
+                        traverse(operand);
+                    }
+                case 224 /* EnumDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 225 /* ModuleDeclaration */:
+                case 223 /* TypeAliasDeclaration */:
+                case 221 /* ClassDeclaration */:
+                case 192 /* ClassExpression */:
+                    // These are not allowed inside a generator now, but eventually they may be allowed
+                    // as local types. Regardless, any yield statements contained within them should be
+                    // skipped in this traversal.
+                    return;
+                default:
+                    if (isFunctionLike(node)) {
+                        var name_5 = node.name;
+                        if (name_5 && name_5.kind === 140 /* ComputedPropertyName */) {
+                            // Note that we will not include methods/accessors of a class because they would require
+                            // first descending into the class. This is by design.
+                            traverse(name_5.expression);
+                            return;
+                        }
+                    }
+                    else if (!isTypeNode(node)) {
+                        // This is the general case, which should include mostly expressions and statements.
+                        // Also includes NodeArrays.
+                        ts.forEachChild(node, traverse);
+                    }
+            }
+        }
+    }
+    ts.forEachYieldExpression = forEachYieldExpression;
+    function isVariableLike(node) {
+        if (node) {
+            switch (node.kind) {
+                case 169 /* BindingElement */:
+                case 255 /* EnumMember */:
+                case 142 /* Parameter */:
+                case 253 /* PropertyAssignment */:
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 254 /* ShorthandPropertyAssignment */:
+                case 218 /* VariableDeclaration */:
+                    return true;
+            }
+        }
+        return false;
+    }
+    ts.isVariableLike = isVariableLike;
+    function isAccessor(node) {
+        return node && (node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */);
+    }
+    ts.isAccessor = isAccessor;
+    function isClassLike(node) {
+        return node && (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */);
+    }
+    ts.isClassLike = isClassLike;
+    function isFunctionLike(node) {
+        return node && isFunctionLikeKind(node.kind);
+    }
+    ts.isFunctionLike = isFunctionLike;
+    function isFunctionLikeKind(kind) {
+        switch (kind) {
+            case 148 /* Constructor */:
+            case 179 /* FunctionExpression */:
+            case 220 /* FunctionDeclaration */:
+            case 180 /* ArrowFunction */:
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 151 /* CallSignature */:
+            case 152 /* ConstructSignature */:
+            case 153 /* IndexSignature */:
+            case 156 /* FunctionType */:
+            case 157 /* ConstructorType */:
+                return true;
+        }
+    }
+    ts.isFunctionLikeKind = isFunctionLikeKind;
+    function introducesArgumentsExoticObject(node) {
+        switch (node.kind) {
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+            case 148 /* Constructor */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 220 /* FunctionDeclaration */:
+            case 179 /* FunctionExpression */:
+                return true;
+        }
+        return false;
+    }
+    ts.introducesArgumentsExoticObject = introducesArgumentsExoticObject;
+    function isIterationStatement(node, lookInLabeledStatements) {
+        switch (node.kind) {
+            case 206 /* ForStatement */:
+            case 207 /* ForInStatement */:
+            case 208 /* ForOfStatement */:
+            case 204 /* DoStatement */:
+            case 205 /* WhileStatement */:
+                return true;
+            case 214 /* LabeledStatement */:
+                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
+        }
+        return false;
+    }
+    ts.isIterationStatement = isIterationStatement;
+    function isFunctionBlock(node) {
+        return node && node.kind === 199 /* Block */ && isFunctionLike(node.parent);
+    }
+    ts.isFunctionBlock = isFunctionBlock;
+    function isObjectLiteralMethod(node) {
+        return node && node.kind === 147 /* MethodDeclaration */ && node.parent.kind === 171 /* ObjectLiteralExpression */;
+    }
+    ts.isObjectLiteralMethod = isObjectLiteralMethod;
+    function isIdentifierTypePredicate(predicate) {
+        return predicate && predicate.kind === 1 /* Identifier */;
+    }
+    ts.isIdentifierTypePredicate = isIdentifierTypePredicate;
+    function isThisTypePredicate(predicate) {
+        return predicate && predicate.kind === 0 /* This */;
+    }
+    ts.isThisTypePredicate = isThisTypePredicate;
+    function getContainingFunction(node) {
+        while (true) {
+            node = node.parent;
+            if (!node || isFunctionLike(node)) {
+                return node;
+            }
+        }
+    }
+    ts.getContainingFunction = getContainingFunction;
+    function getContainingClass(node) {
+        while (true) {
+            node = node.parent;
+            if (!node || isClassLike(node)) {
+                return node;
+            }
+        }
+    }
+    ts.getContainingClass = getContainingClass;
+    function getThisContainer(node, includeArrowFunctions) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return undefined;
+            }
+            switch (node.kind) {
+                case 140 /* ComputedPropertyName */:
+                    // If the grandparent node is an object literal (as opposed to a class),
+                    // then the computed property is not a 'this' container.
+                    // A computed property name in a class needs to be a this container
+                    // so that we can error on it.
+                    if (isClassLike(node.parent.parent)) {
+                        return node;
+                    }
+                    // If this is a computed property, then the parent should not
+                    // make it a this container. The parent might be a property
+                    // in an object literal, like a method or accessor. But in order for
+                    // such a parent to be a this container, the reference must be in
+                    // the *body* of the container.
+                    node = node.parent;
+                    break;
+                case 143 /* Decorator */:
+                    // Decorators are always applied outside of the body of a class or method.
+                    if (node.parent.kind === 142 /* Parameter */ && isClassElement(node.parent.parent)) {
+                        // If the decorator's parent is a Parameter, we resolve the this container from
+                        // the grandparent class declaration.
+                        node = node.parent.parent;
+                    }
+                    else if (isClassElement(node.parent)) {
+                        // If the decorator's parent is a class element, we resolve the 'this' container
+                        // from the parent class declaration.
+                        node = node.parent;
+                    }
+                    break;
+                case 180 /* ArrowFunction */:
+                    if (!includeArrowFunctions) {
+                        continue;
+                    }
+                // Fall through
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 225 /* ModuleDeclaration */:
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 148 /* Constructor */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 151 /* CallSignature */:
+                case 152 /* ConstructSignature */:
+                case 153 /* IndexSignature */:
+                case 224 /* EnumDeclaration */:
+                case 256 /* SourceFile */:
+                    return node;
+            }
+        }
+    }
+    ts.getThisContainer = getThisContainer;
+    /**
+      * Given an super call\property node returns a closest node where either
+      * - super call\property is legal in the node and not legal in the parent node the node.
+      *   i.e. super call is legal in constructor but not legal in the class body.
+      * - node is arrow function (so caller might need to call getSuperContainer in case it needs to climb higher)
+      * - super call\property is definitely illegal in the node (but might be legal in some subnode)
+      *   i.e. super property access is illegal in function declaration but can be legal in the statement list
+      */
+    function getSuperContainer(node, stopOnFunctions) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return node;
+            }
+            switch (node.kind) {
+                case 140 /* ComputedPropertyName */:
+                    node = node.parent;
+                    break;
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    if (!stopOnFunctions) {
+                        continue;
+                    }
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 148 /* Constructor */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                    return node;
+                case 143 /* Decorator */:
+                    // Decorators are always applied outside of the body of a class or method.
+                    if (node.parent.kind === 142 /* Parameter */ && isClassElement(node.parent.parent)) {
+                        // If the decorator's parent is a Parameter, we resolve the this container from
+                        // the grandparent class declaration.
+                        node = node.parent.parent;
+                    }
+                    else if (isClassElement(node.parent)) {
+                        // If the decorator's parent is a class element, we resolve the 'this' container
+                        // from the parent class declaration.
+                        node = node.parent;
+                    }
+                    break;
+            }
+        }
+    }
+    ts.getSuperContainer = getSuperContainer;
+    function getImmediatelyInvokedFunctionExpression(func) {
+        if (func.kind === 179 /* FunctionExpression */ || func.kind === 180 /* ArrowFunction */) {
+            var prev = func;
+            var parent_2 = func.parent;
+            while (parent_2.kind === 178 /* ParenthesizedExpression */) {
+                prev = parent_2;
+                parent_2 = parent_2.parent;
+            }
+            if (parent_2.kind === 174 /* CallExpression */ && parent_2.expression === prev) {
+                return parent_2;
+            }
+        }
+    }
+    ts.getImmediatelyInvokedFunctionExpression = getImmediatelyInvokedFunctionExpression;
+    /**
+     * Determines whether a node is a property or element access expression for super.
+     */
+    function isSuperPropertyOrElementAccess(node) {
+        return (node.kind === 172 /* PropertyAccessExpression */
+            || node.kind === 173 /* ElementAccessExpression */)
+            && node.expression.kind === 95 /* SuperKeyword */;
+    }
+    ts.isSuperPropertyOrElementAccess = isSuperPropertyOrElementAccess;
+    function getEntityNameFromTypeNode(node) {
+        if (node) {
+            switch (node.kind) {
+                case 155 /* TypeReference */:
+                    return node.typeName;
+                case 194 /* ExpressionWithTypeArguments */:
+                    return node.expression;
+                case 69 /* Identifier */:
+                case 139 /* QualifiedName */:
+                    return node;
+            }
+        }
+        return undefined;
+    }
+    ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
+    function getInvokedExpression(node) {
+        if (node.kind === 176 /* TaggedTemplateExpression */) {
+            return node.tag;
+        }
+        // Will either be a CallExpression, NewExpression, or Decorator.
+        return node.expression;
+    }
+    ts.getInvokedExpression = getInvokedExpression;
+    function nodeCanBeDecorated(node) {
+        switch (node.kind) {
+            case 221 /* ClassDeclaration */:
+                // classes are valid targets
+                return true;
+            case 145 /* PropertyDeclaration */:
+                // property declarations are valid if their parent is a class declaration.
+                return node.parent.kind === 221 /* ClassDeclaration */;
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 147 /* MethodDeclaration */:
+                // if this method has a body and its parent is a class declaration, this is a valid target.
+                return node.body !== undefined
+                    && node.parent.kind === 221 /* ClassDeclaration */;
+            case 142 /* Parameter */:
+                // if the parameter's parent has a body and its grandparent is a class declaration, this is a valid target;
+                return node.parent.body !== undefined
+                    && (node.parent.kind === 148 /* Constructor */
+                        || node.parent.kind === 147 /* MethodDeclaration */
+                        || node.parent.kind === 150 /* SetAccessor */)
+                    && node.parent.parent.kind === 221 /* ClassDeclaration */;
+        }
+        return false;
+    }
+    ts.nodeCanBeDecorated = nodeCanBeDecorated;
+    function nodeIsDecorated(node) {
+        return node.decorators !== undefined
+            && nodeCanBeDecorated(node);
+    }
+    ts.nodeIsDecorated = nodeIsDecorated;
+    function isPropertyAccessExpression(node) {
+        return node.kind === 172 /* PropertyAccessExpression */;
+    }
+    ts.isPropertyAccessExpression = isPropertyAccessExpression;
+    function isElementAccessExpression(node) {
+        return node.kind === 173 /* ElementAccessExpression */;
+    }
+    ts.isElementAccessExpression = isElementAccessExpression;
+    function isJSXTagName(node) {
+        var parent = node.parent;
+        if (parent.kind === 243 /* JsxOpeningElement */ ||
+            parent.kind === 242 /* JsxSelfClosingElement */ ||
+            parent.kind === 245 /* JsxClosingElement */) {
+            return parent.tagName === node;
+        }
+        return false;
+    }
+    ts.isJSXTagName = isJSXTagName;
+    function isExpression(node) {
+        switch (node.kind) {
+            case 97 /* ThisKeyword */:
+            case 95 /* SuperKeyword */:
+            case 93 /* NullKeyword */:
+            case 99 /* TrueKeyword */:
+            case 84 /* FalseKeyword */:
+            case 10 /* RegularExpressionLiteral */:
+            case 170 /* ArrayLiteralExpression */:
+            case 171 /* ObjectLiteralExpression */:
+            case 172 /* PropertyAccessExpression */:
+            case 173 /* ElementAccessExpression */:
+            case 174 /* CallExpression */:
+            case 175 /* NewExpression */:
+            case 176 /* TaggedTemplateExpression */:
+            case 195 /* AsExpression */:
+            case 177 /* TypeAssertionExpression */:
+            case 196 /* NonNullExpression */:
+            case 178 /* ParenthesizedExpression */:
+            case 179 /* FunctionExpression */:
+            case 192 /* ClassExpression */:
+            case 180 /* ArrowFunction */:
+            case 183 /* VoidExpression */:
+            case 181 /* DeleteExpression */:
+            case 182 /* TypeOfExpression */:
+            case 185 /* PrefixUnaryExpression */:
+            case 186 /* PostfixUnaryExpression */:
+            case 187 /* BinaryExpression */:
+            case 188 /* ConditionalExpression */:
+            case 191 /* SpreadElementExpression */:
+            case 189 /* TemplateExpression */:
+            case 11 /* NoSubstitutionTemplateLiteral */:
+            case 193 /* OmittedExpression */:
+            case 241 /* JsxElement */:
+            case 242 /* JsxSelfClosingElement */:
+            case 190 /* YieldExpression */:
+            case 184 /* AwaitExpression */:
+                return true;
+            case 139 /* QualifiedName */:
+                while (node.parent.kind === 139 /* QualifiedName */) {
+                    node = node.parent;
+                }
+                return node.parent.kind === 158 /* TypeQuery */ || isJSXTagName(node);
+            case 69 /* Identifier */:
+                if (node.parent.kind === 158 /* TypeQuery */ || isJSXTagName(node)) {
+                    return true;
+                }
+            // fall through
+            case 8 /* NumericLiteral */:
+            case 9 /* StringLiteral */:
+            case 97 /* ThisKeyword */:
+                var parent_3 = node.parent;
+                switch (parent_3.kind) {
+                    case 218 /* VariableDeclaration */:
+                    case 142 /* Parameter */:
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                    case 255 /* EnumMember */:
+                    case 253 /* PropertyAssignment */:
+                    case 169 /* BindingElement */:
+                        return parent_3.initializer === node;
+                    case 202 /* ExpressionStatement */:
+                    case 203 /* IfStatement */:
+                    case 204 /* DoStatement */:
+                    case 205 /* WhileStatement */:
+                    case 211 /* ReturnStatement */:
+                    case 212 /* WithStatement */:
+                    case 213 /* SwitchStatement */:
+                    case 249 /* CaseClause */:
+                    case 215 /* ThrowStatement */:
+                    case 213 /* SwitchStatement */:
+                        return parent_3.expression === node;
+                    case 206 /* ForStatement */:
+                        var forStatement = parent_3;
+                        return (forStatement.initializer === node && forStatement.initializer.kind !== 219 /* VariableDeclarationList */) ||
+                            forStatement.condition === node ||
+                            forStatement.incrementor === node;
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                        var forInStatement = parent_3;
+                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 219 /* VariableDeclarationList */) ||
+                            forInStatement.expression === node;
+                    case 177 /* TypeAssertionExpression */:
+                    case 195 /* AsExpression */:
+                        return node === parent_3.expression;
+                    case 197 /* TemplateSpan */:
+                        return node === parent_3.expression;
+                    case 140 /* ComputedPropertyName */:
+                        return node === parent_3.expression;
+                    case 143 /* Decorator */:
+                    case 248 /* JsxExpression */:
+                    case 247 /* JsxSpreadAttribute */:
+                        return true;
+                    case 194 /* ExpressionWithTypeArguments */:
+                        return parent_3.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent_3);
+                    default:
+                        if (isExpression(parent_3)) {
+                            return true;
+                        }
+                }
+        }
+        return false;
+    }
+    ts.isExpression = isExpression;
+    function isExternalModuleNameRelative(moduleName) {
+        // TypeScript 1.0 spec (April 2014): 11.2.1
+        // An external module name is "relative" if the first term is "." or "..".
+        return moduleName.substr(0, 2) === "./" || moduleName.substr(0, 3) === "../" || moduleName.substr(0, 2) === ".\\" || moduleName.substr(0, 3) === "..\\";
+    }
+    ts.isExternalModuleNameRelative = isExternalModuleNameRelative;
+    function isInstantiatedModule(node, preserveConstEnums) {
+        var moduleState = ts.getModuleInstanceState(node);
+        return moduleState === 1 /* Instantiated */ ||
+            (preserveConstEnums && moduleState === 2 /* ConstEnumOnly */);
+    }
+    ts.isInstantiatedModule = isInstantiatedModule;
+    function isExternalModuleImportEqualsDeclaration(node) {
+        return node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 240 /* ExternalModuleReference */;
+    }
+    ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
+    function getExternalModuleImportEqualsDeclarationExpression(node) {
+        ts.Debug.assert(isExternalModuleImportEqualsDeclaration(node));
+        return node.moduleReference.expression;
+    }
+    ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
+    function isInternalModuleImportEqualsDeclaration(node) {
+        return node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind !== 240 /* ExternalModuleReference */;
+    }
+    ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
+    function isSourceFileJavaScript(file) {
+        return isInJavaScriptFile(file);
+    }
+    ts.isSourceFileJavaScript = isSourceFileJavaScript;
+    function isInJavaScriptFile(node) {
+        return node && !!(node.flags & 134217728 /* JavaScriptFile */);
+    }
+    ts.isInJavaScriptFile = isInJavaScriptFile;
+    /**
+     * Returns true if the node is a CallExpression to the identifier 'require' with
+     * exactly one argument.
+     * This function does not test if the node is in a JavaScript file or not.
+    */
+    function isRequireCall(expression, checkArgumentIsStringLiteral) {
+        // of the form 'require("name")'
+        var isRequire = expression.kind === 174 /* CallExpression */ &&
+            expression.expression.kind === 69 /* Identifier */ &&
+            expression.expression.text === "require" &&
+            expression.arguments.length === 1;
+        return isRequire && (!checkArgumentIsStringLiteral || expression.arguments[0].kind === 9 /* StringLiteral */);
+    }
+    ts.isRequireCall = isRequireCall;
+    function isSingleOrDoubleQuote(charCode) {
+        return charCode === 39 /* singleQuote */ || charCode === 34 /* doubleQuote */;
+    }
+    ts.isSingleOrDoubleQuote = isSingleOrDoubleQuote;
+    /// Given a BinaryExpression, returns SpecialPropertyAssignmentKind for the various kinds of property
+    /// assignments we treat as special in the binder
+    function getSpecialPropertyAssignmentKind(expression) {
+        if (!isInJavaScriptFile(expression)) {
+            return 0 /* None */;
+        }
+        if (expression.kind !== 187 /* BinaryExpression */) {
+            return 0 /* None */;
+        }
+        var expr = expression;
+        if (expr.operatorToken.kind !== 56 /* EqualsToken */ || expr.left.kind !== 172 /* PropertyAccessExpression */) {
+            return 0 /* None */;
+        }
+        var lhs = expr.left;
+        if (lhs.expression.kind === 69 /* Identifier */) {
+            var lhsId = lhs.expression;
+            if (lhsId.text === "exports") {
+                // exports.name = expr
+                return 1 /* ExportsProperty */;
+            }
+            else if (lhsId.text === "module" && lhs.name.text === "exports") {
+                // module.exports = expr
+                return 2 /* ModuleExports */;
+            }
+        }
+        else if (lhs.expression.kind === 97 /* ThisKeyword */) {
+            return 4 /* ThisProperty */;
+        }
+        else if (lhs.expression.kind === 172 /* PropertyAccessExpression */) {
+            // chained dot, e.g. x.y.z = expr; this var is the 'x.y' part
+            var innerPropertyAccess = lhs.expression;
+            if (innerPropertyAccess.expression.kind === 69 /* Identifier */) {
+                // module.exports.name = expr
+                var innerPropertyAccessIdentifier = innerPropertyAccess.expression;
+                if (innerPropertyAccessIdentifier.text === "module" && innerPropertyAccess.name.text === "exports") {
+                    return 1 /* ExportsProperty */;
+                }
+                if (innerPropertyAccess.name.text === "prototype") {
+                    return 3 /* PrototypeProperty */;
+                }
+            }
+        }
+        return 0 /* None */;
+    }
+    ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
+    function getExternalModuleName(node) {
+        if (node.kind === 230 /* ImportDeclaration */) {
+            return node.moduleSpecifier;
+        }
+        if (node.kind === 229 /* ImportEqualsDeclaration */) {
+            var reference = node.moduleReference;
+            if (reference.kind === 240 /* ExternalModuleReference */) {
+                return reference.expression;
+            }
+        }
+        if (node.kind === 236 /* ExportDeclaration */) {
+            return node.moduleSpecifier;
+        }
+        if (node.kind === 225 /* ModuleDeclaration */ && node.name.kind === 9 /* StringLiteral */) {
+            return node.name;
+        }
+    }
+    ts.getExternalModuleName = getExternalModuleName;
+    function hasQuestionToken(node) {
+        if (node) {
+            switch (node.kind) {
+                case 142 /* Parameter */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 254 /* ShorthandPropertyAssignment */:
+                case 253 /* PropertyAssignment */:
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                    return node.questionToken !== undefined;
+            }
+        }
+        return false;
+    }
+    ts.hasQuestionToken = hasQuestionToken;
+    function isJSDocConstructSignature(node) {
+        return node.kind === 269 /* JSDocFunctionType */ &&
+            node.parameters.length > 0 &&
+            node.parameters[0].type.kind === 271 /* JSDocConstructorType */;
+    }
+    ts.isJSDocConstructSignature = isJSDocConstructSignature;
+    function getJSDocTag(node, kind, checkParentVariableStatement) {
+        if (!node) {
+            return undefined;
+        }
+        var jsDocComments = getJSDocComments(node, checkParentVariableStatement);
+        if (!jsDocComments) {
+            return undefined;
+        }
+        for (var _i = 0, jsDocComments_1 = jsDocComments; _i < jsDocComments_1.length; _i++) {
+            var jsDocComment = jsDocComments_1[_i];
+            for (var _a = 0, _b = jsDocComment.tags; _a < _b.length; _a++) {
+                var tag = _b[_a];
+                if (tag.kind === kind) {
+                    return tag;
+                }
+            }
+        }
+    }
+    function getJSDocComments(node, checkParentVariableStatement) {
+        if (node.jsDocComments) {
+            return node.jsDocComments;
+        }
+        // Try to recognize this pattern when node is initializer of variable declaration and JSDoc comments are on containing variable statement.
+        // /**
+        //   * @param {number} name
+        //   * @returns {number}
+        //   */
+        // var x = function(name) { return name.length; }
+        if (checkParentVariableStatement) {
+            var isInitializerOfVariableDeclarationInStatement = node.parent.kind === 218 /* VariableDeclaration */ &&
+                node.parent.initializer === node &&
+                node.parent.parent.parent.kind === 200 /* VariableStatement */;
+            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent : undefined;
+            if (variableStatementNode) {
+                return variableStatementNode.jsDocComments;
+            }
+            // Also recognize when the node is the RHS of an assignment expression
+            var parent_4 = node.parent;
+            var isSourceOfAssignmentExpressionStatement = parent_4 && parent_4.parent &&
+                parent_4.kind === 187 /* BinaryExpression */ &&
+                parent_4.operatorToken.kind === 56 /* EqualsToken */ &&
+                parent_4.parent.kind === 202 /* ExpressionStatement */;
+            if (isSourceOfAssignmentExpressionStatement) {
+                return parent_4.parent.jsDocComments;
+            }
+            var isPropertyAssignmentExpression = parent_4 && parent_4.kind === 253 /* PropertyAssignment */;
+            if (isPropertyAssignmentExpression) {
+                return parent_4.jsDocComments;
+            }
+        }
+        return undefined;
+    }
+    function getJSDocTypeTag(node) {
+        return getJSDocTag(node, 277 /* JSDocTypeTag */, /*checkParentVariableStatement*/ false);
+    }
+    ts.getJSDocTypeTag = getJSDocTypeTag;
+    function getJSDocReturnTag(node) {
+        return getJSDocTag(node, 276 /* JSDocReturnTag */, /*checkParentVariableStatement*/ true);
+    }
+    ts.getJSDocReturnTag = getJSDocReturnTag;
+    function getJSDocTemplateTag(node) {
+        return getJSDocTag(node, 278 /* JSDocTemplateTag */, /*checkParentVariableStatement*/ false);
+    }
+    ts.getJSDocTemplateTag = getJSDocTemplateTag;
+    function getCorrespondingJSDocParameterTag(parameter) {
+        if (parameter.name && parameter.name.kind === 69 /* Identifier */) {
+            // If it's a parameter, see if the parent has a jsdoc comment with an @param
+            // annotation.
+            var parameterName = parameter.name.text;
+            var jsDocComments = getJSDocComments(parameter.parent, /*checkParentVariableStatement*/ true);
+            if (jsDocComments) {
+                for (var _i = 0, jsDocComments_2 = jsDocComments; _i < jsDocComments_2.length; _i++) {
+                    var jsDocComment = jsDocComments_2[_i];
+                    for (var _a = 0, _b = jsDocComment.tags; _a < _b.length; _a++) {
+                        var tag = _b[_a];
+                        if (tag.kind === 275 /* JSDocParameterTag */) {
+                            var parameterTag = tag;
+                            var name_6 = parameterTag.preParameterName || parameterTag.postParameterName;
+                            if (name_6.text === parameterName) {
+                                return parameterTag;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getCorrespondingJSDocParameterTag = getCorrespondingJSDocParameterTag;
+    function hasRestParameter(s) {
+        return isRestParameter(ts.lastOrUndefined(s.parameters));
+    }
+    ts.hasRestParameter = hasRestParameter;
+    function hasDeclaredRestParameter(s) {
+        return isDeclaredRestParam(ts.lastOrUndefined(s.parameters));
+    }
+    ts.hasDeclaredRestParameter = hasDeclaredRestParameter;
+    function isRestParameter(node) {
+        if (node && (node.flags & 134217728 /* JavaScriptFile */)) {
+            if (node.type && node.type.kind === 270 /* JSDocVariadicType */) {
+                return true;
+            }
+            var paramTag = getCorrespondingJSDocParameterTag(node);
+            if (paramTag && paramTag.typeExpression) {
+                return paramTag.typeExpression.type.kind === 270 /* JSDocVariadicType */;
+            }
+        }
+        return isDeclaredRestParam(node);
+    }
+    ts.isRestParameter = isRestParameter;
+    function isDeclaredRestParam(node) {
+        return node && node.dotDotDotToken !== undefined;
+    }
+    ts.isDeclaredRestParam = isDeclaredRestParam;
+    function isLiteralKind(kind) {
+        return 8 /* FirstLiteralToken */ <= kind && kind <= 11 /* LastLiteralToken */;
+    }
+    ts.isLiteralKind = isLiteralKind;
+    function isTextualLiteralKind(kind) {
+        return kind === 9 /* StringLiteral */ || kind === 11 /* NoSubstitutionTemplateLiteral */;
+    }
+    ts.isTextualLiteralKind = isTextualLiteralKind;
+    function isTemplateLiteralKind(kind) {
+        return 11 /* FirstTemplateToken */ <= kind && kind <= 14 /* LastTemplateToken */;
+    }
+    ts.isTemplateLiteralKind = isTemplateLiteralKind;
+    function isBindingPattern(node) {
+        return !!node && (node.kind === 168 /* ArrayBindingPattern */ || node.kind === 167 /* ObjectBindingPattern */);
+    }
+    ts.isBindingPattern = isBindingPattern;
+    // A node is an assignment target if it is on the left hand side of an '=' token, if it is parented by a property
+    // assignment in an object literal that is an assignment target, or if it is parented by an array literal that is
+    // an assignment target. Examples include 'a = xxx', '{ p: a } = xxx', '[{ p: a}] = xxx'.
+    function isAssignmentTarget(node) {
+        while (node.parent.kind === 178 /* ParenthesizedExpression */) {
+            node = node.parent;
+        }
+        while (true) {
+            var parent_5 = node.parent;
+            if (parent_5.kind === 170 /* ArrayLiteralExpression */ || parent_5.kind === 191 /* SpreadElementExpression */) {
+                node = parent_5;
+                continue;
+            }
+            if (parent_5.kind === 253 /* PropertyAssignment */ || parent_5.kind === 254 /* ShorthandPropertyAssignment */) {
+                node = parent_5.parent;
+                continue;
+            }
+            return parent_5.kind === 187 /* BinaryExpression */ &&
+                parent_5.operatorToken.kind === 56 /* EqualsToken */ &&
+                parent_5.left === node ||
+                (parent_5.kind === 207 /* ForInStatement */ || parent_5.kind === 208 /* ForOfStatement */) &&
+                    parent_5.initializer === node;
+        }
+    }
+    ts.isAssignmentTarget = isAssignmentTarget;
+    function isNodeDescendentOf(node, ancestor) {
+        while (node) {
+            if (node === ancestor)
+                return true;
+            node = node.parent;
+        }
+        return false;
+    }
+    ts.isNodeDescendentOf = isNodeDescendentOf;
+    function isInAmbientContext(node) {
+        while (node) {
+            if (node.flags & 2 /* Ambient */ || (node.kind === 256 /* SourceFile */ && node.isDeclarationFile)) {
+                return true;
+            }
+            node = node.parent;
+        }
+        return false;
+    }
+    ts.isInAmbientContext = isInAmbientContext;
+    function isDeclaration(node) {
+        switch (node.kind) {
+            case 180 /* ArrowFunction */:
+            case 169 /* BindingElement */:
+            case 221 /* ClassDeclaration */:
+            case 192 /* ClassExpression */:
+            case 148 /* Constructor */:
+            case 224 /* EnumDeclaration */:
+            case 255 /* EnumMember */:
+            case 238 /* ExportSpecifier */:
+            case 220 /* FunctionDeclaration */:
+            case 179 /* FunctionExpression */:
+            case 149 /* GetAccessor */:
+            case 231 /* ImportClause */:
+            case 229 /* ImportEqualsDeclaration */:
+            case 234 /* ImportSpecifier */:
+            case 222 /* InterfaceDeclaration */:
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+            case 225 /* ModuleDeclaration */:
+            case 232 /* NamespaceImport */:
+            case 142 /* Parameter */:
+            case 253 /* PropertyAssignment */:
+            case 145 /* PropertyDeclaration */:
+            case 144 /* PropertySignature */:
+            case 150 /* SetAccessor */:
+            case 254 /* ShorthandPropertyAssignment */:
+            case 223 /* TypeAliasDeclaration */:
+            case 141 /* TypeParameter */:
+            case 218 /* VariableDeclaration */:
+            case 279 /* JSDocTypedefTag */:
+                return true;
+        }
+        return false;
+    }
+    ts.isDeclaration = isDeclaration;
+    function isStatement(n) {
+        switch (n.kind) {
+            case 210 /* BreakStatement */:
+            case 209 /* ContinueStatement */:
+            case 217 /* DebuggerStatement */:
+            case 204 /* DoStatement */:
+            case 202 /* ExpressionStatement */:
+            case 201 /* EmptyStatement */:
+            case 207 /* ForInStatement */:
+            case 208 /* ForOfStatement */:
+            case 206 /* ForStatement */:
+            case 203 /* IfStatement */:
+            case 214 /* LabeledStatement */:
+            case 211 /* ReturnStatement */:
+            case 213 /* SwitchStatement */:
+            case 215 /* ThrowStatement */:
+            case 216 /* TryStatement */:
+            case 200 /* VariableStatement */:
+            case 205 /* WhileStatement */:
+            case 212 /* WithStatement */:
+            case 235 /* ExportAssignment */:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isStatement = isStatement;
+    function isClassElement(n) {
+        switch (n.kind) {
+            case 148 /* Constructor */:
+            case 145 /* PropertyDeclaration */:
+            case 147 /* MethodDeclaration */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 146 /* MethodSignature */:
+            case 153 /* IndexSignature */:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isClassElement = isClassElement;
+    // True if the given identifier, string literal, or number literal is the name of a declaration node
+    function isDeclarationName(name) {
+        if (name.kind !== 69 /* Identifier */ && name.kind !== 9 /* StringLiteral */ && name.kind !== 8 /* NumericLiteral */) {
+            return false;
+        }
+        var parent = name.parent;
+        if (parent.kind === 234 /* ImportSpecifier */ || parent.kind === 238 /* ExportSpecifier */) {
+            if (parent.propertyName) {
+                return true;
+            }
+        }
+        if (isDeclaration(parent)) {
+            return parent.name === name;
+        }
+        return false;
+    }
+    ts.isDeclarationName = isDeclarationName;
+    function isLiteralComputedPropertyDeclarationName(node) {
+        return (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) &&
+            node.parent.kind === 140 /* ComputedPropertyName */ &&
+            isDeclaration(node.parent.parent);
+    }
+    ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
+    // Return true if the given identifier is classified as an IdentifierName
+    function isIdentifierName(node) {
+        var parent = node.parent;
+        switch (parent.kind) {
+            case 145 /* PropertyDeclaration */:
+            case 144 /* PropertySignature */:
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 255 /* EnumMember */:
+            case 253 /* PropertyAssignment */:
+            case 172 /* PropertyAccessExpression */:
+                // Name in member declaration or property name in property access
+                return parent.name === node;
+            case 139 /* QualifiedName */:
+                // Name on right hand side of dot in a type query
+                if (parent.right === node) {
+                    while (parent.kind === 139 /* QualifiedName */) {
+                        parent = parent.parent;
+                    }
+                    return parent.kind === 158 /* TypeQuery */;
+                }
+                return false;
+            case 169 /* BindingElement */:
+            case 234 /* ImportSpecifier */:
+                // Property name in binding element or import specifier
+                return parent.propertyName === node;
+            case 238 /* ExportSpecifier */:
+                // Any name in an export specifier
+                return true;
+        }
+        return false;
+    }
+    ts.isIdentifierName = isIdentifierName;
+    // An alias symbol is created by one of the following declarations:
+    // import <symbol> = ...
+    // import <symbol> from ...
+    // import * as <symbol> from ...
+    // import { x as <symbol> } from ...
+    // export { x as <symbol> } from ...
+    // export = ...
+    // export default ...
+    function isAliasSymbolDeclaration(node) {
+        return node.kind === 229 /* ImportEqualsDeclaration */ ||
+            node.kind === 228 /* NamespaceExportDeclaration */ ||
+            node.kind === 231 /* ImportClause */ && !!node.name ||
+            node.kind === 232 /* NamespaceImport */ ||
+            node.kind === 234 /* ImportSpecifier */ ||
+            node.kind === 238 /* ExportSpecifier */ ||
+            node.kind === 235 /* ExportAssignment */ && node.expression.kind === 69 /* Identifier */;
+    }
+    ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
+    function getClassExtendsHeritageClauseElement(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 83 /* ExtendsKeyword */);
+        return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
+    }
+    ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
+    function getClassImplementsHeritageClauseElements(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 106 /* ImplementsKeyword */);
+        return heritageClause ? heritageClause.types : undefined;
+    }
+    ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
+    function getInterfaceBaseTypeNodes(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 83 /* ExtendsKeyword */);
+        return heritageClause ? heritageClause.types : undefined;
+    }
+    ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
+    function getHeritageClause(clauses, kind) {
+        if (clauses) {
+            for (var _i = 0, clauses_1 = clauses; _i < clauses_1.length; _i++) {
+                var clause = clauses_1[_i];
+                if (clause.token === kind) {
+                    return clause;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getHeritageClause = getHeritageClause;
+    function tryResolveScriptReference(host, sourceFile, reference) {
+        if (!host.getCompilerOptions().noResolve) {
+            var referenceFileName = ts.isRootedDiskPath(reference.fileName) ? reference.fileName : ts.combinePaths(ts.getDirectoryPath(sourceFile.fileName), reference.fileName);
+            return host.getSourceFile(referenceFileName);
+        }
+    }
+    ts.tryResolveScriptReference = tryResolveScriptReference;
+    function getAncestor(node, kind) {
+        while (node) {
+            if (node.kind === kind) {
+                return node;
+            }
+            node = node.parent;
+        }
+        return undefined;
+    }
+    ts.getAncestor = getAncestor;
+    function getFileReferenceFromReferencePath(comment, commentRange) {
+        var simpleReferenceRegEx = /^\/\/\/\s*<reference\s+/gim;
+        var isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
+        if (simpleReferenceRegEx.test(comment)) {
+            if (isNoDefaultLibRegEx.test(comment)) {
+                return {
+                    isNoDefaultLib: true
+                };
+            }
+            else {
+                var refMatchResult = ts.fullTripleSlashReferencePathRegEx.exec(comment);
+                var refLibResult = !refMatchResult && ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx.exec(comment);
+                if (refMatchResult || refLibResult) {
+                    var start = commentRange.pos;
+                    var end = commentRange.end;
+                    return {
+                        fileReference: {
+                            pos: start,
+                            end: end,
+                            fileName: (refMatchResult || refLibResult)[3]
+                        },
+                        isNoDefaultLib: false,
+                        isTypeReferenceDirective: !!refLibResult
+                    };
+                }
+                return {
+                    diagnosticMessage: ts.Diagnostics.Invalid_reference_directive_syntax,
+                    isNoDefaultLib: false
+                };
+            }
+        }
+        return undefined;
+    }
+    ts.getFileReferenceFromReferencePath = getFileReferenceFromReferencePath;
+    function isKeyword(token) {
+        return 70 /* FirstKeyword */ <= token && token <= 138 /* LastKeyword */;
+    }
+    ts.isKeyword = isKeyword;
+    function isTrivia(token) {
+        return 2 /* FirstTriviaToken */ <= token && token <= 7 /* LastTriviaToken */;
+    }
+    ts.isTrivia = isTrivia;
+    function isAsyncFunctionLike(node) {
+        return isFunctionLike(node) && (node.flags & 256 /* Async */) !== 0 && !isAccessor(node);
+    }
+    ts.isAsyncFunctionLike = isAsyncFunctionLike;
+    function isStringOrNumericLiteral(kind) {
+        return kind === 9 /* StringLiteral */ || kind === 8 /* NumericLiteral */;
+    }
+    ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
+    /**
+     * A declaration has a dynamic name if both of the following are true:
+     *   1. The declaration has a computed property name
+     *   2. The computed name is *not* expressed as Symbol.<name>, where name
+     *      is a property of the Symbol constructor that denotes a built in
+     *      Symbol.
+     */
+    function hasDynamicName(declaration) {
+        return declaration.name && isDynamicName(declaration.name);
+    }
+    ts.hasDynamicName = hasDynamicName;
+    function isDynamicName(name) {
+        return name.kind === 140 /* ComputedPropertyName */ &&
+            !isStringOrNumericLiteral(name.expression.kind) &&
+            !isWellKnownSymbolSyntactically(name.expression);
+    }
+    ts.isDynamicName = isDynamicName;
+    /**
+     * Checks if the expression is of the form:
+     *    Symbol.name
+     * where Symbol is literally the word "Symbol", and name is any identifierName
+     */
+    function isWellKnownSymbolSyntactically(node) {
+        return isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
+    }
+    ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
+    function getPropertyNameForPropertyNameNode(name) {
+        if (name.kind === 69 /* Identifier */ || name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */ || name.kind === 142 /* Parameter */) {
+            return name.text;
+        }
+        if (name.kind === 140 /* ComputedPropertyName */) {
+            var nameExpression = name.expression;
+            if (isWellKnownSymbolSyntactically(nameExpression)) {
+                var rightHandSideName = nameExpression.name.text;
+                return getPropertyNameForKnownSymbolName(rightHandSideName);
+            }
+            else if (nameExpression.kind === 9 /* StringLiteral */ || nameExpression.kind === 8 /* NumericLiteral */) {
+                return nameExpression.text;
+            }
+        }
+        return undefined;
+    }
+    ts.getPropertyNameForPropertyNameNode = getPropertyNameForPropertyNameNode;
+    function getPropertyNameForKnownSymbolName(symbolName) {
+        return "__@" + symbolName;
+    }
+    ts.getPropertyNameForKnownSymbolName = getPropertyNameForKnownSymbolName;
+    /**
+     * Includes the word "Symbol" with unicode escapes
+     */
+    function isESSymbolIdentifier(node) {
+        return node.kind === 69 /* Identifier */ && node.text === "Symbol";
+    }
+    ts.isESSymbolIdentifier = isESSymbolIdentifier;
+    function isModifierKind(token) {
+        switch (token) {
+            case 115 /* AbstractKeyword */:
+            case 118 /* AsyncKeyword */:
+            case 74 /* ConstKeyword */:
+            case 122 /* DeclareKeyword */:
+            case 77 /* DefaultKeyword */:
+            case 82 /* ExportKeyword */:
+            case 112 /* PublicKeyword */:
+            case 110 /* PrivateKeyword */:
+            case 111 /* ProtectedKeyword */:
+            case 128 /* ReadonlyKeyword */:
+            case 113 /* StaticKeyword */:
+                return true;
+        }
+        return false;
+    }
+    ts.isModifierKind = isModifierKind;
+    function isParameterDeclaration(node) {
+        var root = getRootDeclaration(node);
+        return root.kind === 142 /* Parameter */;
+    }
+    ts.isParameterDeclaration = isParameterDeclaration;
+    function getRootDeclaration(node) {
+        while (node.kind === 169 /* BindingElement */) {
+            node = node.parent.parent;
+        }
+        return node;
+    }
+    ts.getRootDeclaration = getRootDeclaration;
+    function nodeStartsNewLexicalEnvironment(n) {
+        return isFunctionLike(n) || n.kind === 225 /* ModuleDeclaration */ || n.kind === 256 /* SourceFile */;
+    }
+    ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
+    /**
+     * Creates a shallow, memberwise clone of a node. The "kind", "pos", "end", "flags", and "parent"
+     * properties are excluded by default, and can be provided via the "location", "flags", and
+     * "parent" parameters.
+     * @param node The node to clone.
+     * @param location An optional TextRange to use to supply the new position.
+     * @param flags The NodeFlags to use for the cloned node.
+     * @param parent The parent for the new node.
+     */
+    function cloneNode(node, location, flags, parent) {
+        // We don't use "clone" from core.ts here, as we need to preserve the prototype chain of
+        // the original node. We also need to exclude specific properties and only include own-
+        // properties (to skip members already defined on the shared prototype).
+        var clone = location !== undefined
+            ? ts.createNode(node.kind, location.pos, location.end)
+            : createSynthesizedNode(node.kind);
+        for (var key in node) {
+            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
+                continue;
+            }
+            clone[key] = node[key];
+        }
+        if (flags !== undefined) {
+            clone.flags = flags;
+        }
+        if (parent !== undefined) {
+            clone.parent = parent;
+        }
+        return clone;
+    }
+    ts.cloneNode = cloneNode;
+    /**
+     * Creates a deep clone of an EntityName, with new parent pointers.
+     * @param node The EntityName to clone.
+     * @param parent The parent for the cloned node.
+     */
+    function cloneEntityName(node, parent) {
+        var clone = cloneNode(node, node, node.flags, parent);
+        if (isQualifiedName(clone)) {
+            var left = clone.left, right = clone.right;
+            clone.left = cloneEntityName(left, clone);
+            clone.right = cloneNode(right, right, right.flags, parent);
+        }
+        return clone;
+    }
+    ts.cloneEntityName = cloneEntityName;
+    function isQualifiedName(node) {
+        return node.kind === 139 /* QualifiedName */;
+    }
+    ts.isQualifiedName = isQualifiedName;
+    function nodeIsSynthesized(node) {
+        return node.pos === -1;
+    }
+    ts.nodeIsSynthesized = nodeIsSynthesized;
+    function createSynthesizedNode(kind, startsOnNewLine) {
+        var node = ts.createNode(kind, /* pos */ -1, /* end */ -1);
+        node.startsOnNewLine = startsOnNewLine;
+        return node;
+    }
+    ts.createSynthesizedNode = createSynthesizedNode;
+    function createSynthesizedNodeArray() {
+        var array = [];
+        array.pos = -1;
+        array.end = -1;
+        return array;
+    }
+    ts.createSynthesizedNodeArray = createSynthesizedNodeArray;
+    function createDiagnosticCollection() {
+        var nonFileDiagnostics = [];
+        var fileDiagnostics = {};
+        var diagnosticsModified = false;
+        var modificationCount = 0;
+        return {
+            add: add,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getDiagnostics: getDiagnostics,
+            getModificationCount: getModificationCount,
+            reattachFileDiagnostics: reattachFileDiagnostics
+        };
+        function getModificationCount() {
+            return modificationCount;
+        }
+        function reattachFileDiagnostics(newFile) {
+            if (!ts.hasProperty(fileDiagnostics, newFile.fileName)) {
+                return;
+            }
+            for (var _i = 0, _a = fileDiagnostics[newFile.fileName]; _i < _a.length; _i++) {
+                var diagnostic = _a[_i];
+                diagnostic.file = newFile;
+            }
+        }
+        function add(diagnostic) {
+            var diagnostics;
+            if (diagnostic.file) {
+                diagnostics = fileDiagnostics[diagnostic.file.fileName];
+                if (!diagnostics) {
+                    diagnostics = [];
+                    fileDiagnostics[diagnostic.file.fileName] = diagnostics;
+                }
+            }
+            else {
+                diagnostics = nonFileDiagnostics;
+            }
+            diagnostics.push(diagnostic);
+            diagnosticsModified = true;
+            modificationCount++;
+        }
+        function getGlobalDiagnostics() {
+            sortAndDeduplicate();
+            return nonFileDiagnostics;
+        }
+        function getDiagnostics(fileName) {
+            sortAndDeduplicate();
+            if (fileName) {
+                return fileDiagnostics[fileName] || [];
+            }
+            var allDiagnostics = [];
+            function pushDiagnostic(d) {
+                allDiagnostics.push(d);
+            }
+            ts.forEach(nonFileDiagnostics, pushDiagnostic);
+            for (var key in fileDiagnostics) {
+                if (ts.hasProperty(fileDiagnostics, key)) {
+                    ts.forEach(fileDiagnostics[key], pushDiagnostic);
+                }
+            }
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function sortAndDeduplicate() {
+            if (!diagnosticsModified) {
+                return;
+            }
+            diagnosticsModified = false;
+            nonFileDiagnostics = ts.sortAndDeduplicateDiagnostics(nonFileDiagnostics);
+            for (var key in fileDiagnostics) {
+                if (ts.hasProperty(fileDiagnostics, key)) {
+                    fileDiagnostics[key] = ts.sortAndDeduplicateDiagnostics(fileDiagnostics[key]);
+                }
+            }
+        }
+    }
+    ts.createDiagnosticCollection = createDiagnosticCollection;
+    // This consists of the first 19 unprintable ASCII characters, canonical escapes, lineSeparator,
+    // paragraphSeparator, and nextLine. The latter three are just desirable to suppress new lines in
+    // the language service. These characters should be escaped when printing, and if any characters are added,
+    // the map below must be updated. Note that this regexp *does not* include the 'delete' character.
+    // There is no reason for this other than that JSON.stringify does not handle it either.
+    var escapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
+    var escapedCharsMap = {
+        "\0": "\\0",
+        "\t": "\\t",
+        "\v": "\\v",
+        "\f": "\\f",
+        "\b": "\\b",
+        "\r": "\\r",
+        "\n": "\\n",
+        "\\": "\\\\",
+        "\"": "\\\"",
+        "\u2028": "\\u2028",
+        "\u2029": "\\u2029",
+        "\u0085": "\\u0085" // nextLine
+    };
+    /**
+     * Based heavily on the abstract 'Quote'/'QuoteJSONString' operation from ECMA-262 (24.3.2.2),
+     * but augmented for a few select characters (e.g. lineSeparator, paragraphSeparator, nextLine)
+     * Note that this doesn't actually wrap the input in double quotes.
+     */
+    function escapeString(s) {
+        s = escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, getReplacement) : s;
+        return s;
+        function getReplacement(c) {
+            return escapedCharsMap[c] || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
+        }
+    }
+    ts.escapeString = escapeString;
+    function isIntrinsicJsxName(name) {
+        var ch = name.substr(0, 1);
+        return ch.toLowerCase() === ch;
+    }
+    ts.isIntrinsicJsxName = isIntrinsicJsxName;
+    function get16BitUnicodeEscapeSequence(charCode) {
+        var hexCharCode = charCode.toString(16).toUpperCase();
+        var paddedHexCode = ("0000" + hexCharCode).slice(-4);
+        return "\\u" + paddedHexCode;
+    }
+    var nonAsciiCharacters = /[^\u0000-\u007F]/g;
+    function escapeNonAsciiCharacters(s) {
+        // Replace non-ASCII characters with '\uNNNN' escapes if any exist.
+        // Otherwise just return the original string.
+        return nonAsciiCharacters.test(s) ?
+            s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
+            s;
+    }
+    ts.escapeNonAsciiCharacters = escapeNonAsciiCharacters;
+    var indentStrings = ["", "    "];
+    function getIndentString(level) {
+        if (indentStrings[level] === undefined) {
+            indentStrings[level] = getIndentString(level - 1) + indentStrings[1];
+        }
+        return indentStrings[level];
+    }
+    ts.getIndentString = getIndentString;
+    function getIndentSize() {
+        return indentStrings[1].length;
+    }
+    ts.getIndentSize = getIndentSize;
+    function createTextWriter(newLine) {
+        var output;
+        var indent;
+        var lineStart;
+        var lineCount;
+        var linePos;
+        function write(s) {
+            if (s && s.length) {
+                if (lineStart) {
+                    output += getIndentString(indent);
+                    lineStart = false;
+                }
+                output += s;
+            }
+        }
+        function reset() {
+            output = "";
+            indent = 0;
+            lineStart = true;
+            lineCount = 0;
+            linePos = 0;
+        }
+        function rawWrite(s) {
+            if (s !== undefined) {
+                if (lineStart) {
+                    lineStart = false;
+                }
+                output += s;
+            }
+        }
+        function writeLiteral(s) {
+            if (s && s.length) {
+                write(s);
+                var lineStartsOfS = ts.computeLineStarts(s);
+                if (lineStartsOfS.length > 1) {
+                    lineCount = lineCount + lineStartsOfS.length - 1;
+                    linePos = output.length - s.length + ts.lastOrUndefined(lineStartsOfS);
+                }
+            }
+        }
+        function writeLine() {
+            if (!lineStart) {
+                output += newLine;
+                lineCount++;
+                linePos = output.length;
+                lineStart = true;
+            }
+        }
+        function writeTextOfNode(text, node) {
+            write(getTextOfNodeFromSourceText(text, node));
+        }
+        reset();
+        return {
+            write: write,
+            rawWrite: rawWrite,
+            writeTextOfNode: writeTextOfNode,
+            writeLiteral: writeLiteral,
+            writeLine: writeLine,
+            increaseIndent: function () { indent++; },
+            decreaseIndent: function () { indent--; },
+            getIndent: function () { return indent; },
+            getTextPos: function () { return output.length; },
+            getLine: function () { return lineCount + 1; },
+            getColumn: function () { return lineStart ? indent * getIndentSize() + 1 : output.length - linePos + 1; },
+            getText: function () { return output; },
+            reset: reset
+        };
+    }
+    ts.createTextWriter = createTextWriter;
+    /**
+     * Resolves a local path to a path which is absolute to the base of the emit
+     */
+    function getExternalModuleNameFromPath(host, fileName) {
+        var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
+        var dir = ts.toPath(host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
+        var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
+        var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+        return ts.removeFileExtension(relativePath);
+    }
+    ts.getExternalModuleNameFromPath = getExternalModuleNameFromPath;
+    function getOwnEmitOutputFilePath(sourceFile, host, extension) {
+        var compilerOptions = host.getCompilerOptions();
+        var emitOutputFilePathWithoutExtension;
+        if (compilerOptions.outDir) {
+            emitOutputFilePathWithoutExtension = ts.removeFileExtension(getSourceFilePathInNewDir(sourceFile, host, compilerOptions.outDir));
+        }
+        else {
+            emitOutputFilePathWithoutExtension = ts.removeFileExtension(sourceFile.fileName);
+        }
+        return emitOutputFilePathWithoutExtension + extension;
+    }
+    ts.getOwnEmitOutputFilePath = getOwnEmitOutputFilePath;
+    function getDeclarationEmitOutputFilePath(sourceFile, host) {
+        var options = host.getCompilerOptions();
+        var outputDir = options.declarationDir || options.outDir; // Prefer declaration folder if specified
+        if (options.declaration) {
+            var path = outputDir
+                ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
+                : sourceFile.fileName;
+            return ts.removeFileExtension(path) + ".d.ts";
+        }
+    }
+    ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
+    function getEmitScriptTarget(compilerOptions) {
+        return compilerOptions.target || 0 /* ES3 */;
+    }
+    ts.getEmitScriptTarget = getEmitScriptTarget;
+    function getEmitModuleKind(compilerOptions) {
+        return typeof compilerOptions.module === "number" ?
+            compilerOptions.module :
+            getEmitScriptTarget(compilerOptions) === 2 /* ES6 */ ? ts.ModuleKind.ES6 : ts.ModuleKind.CommonJS;
+    }
+    ts.getEmitModuleKind = getEmitModuleKind;
+    function forEachExpectedEmitFile(host, action, targetSourceFile) {
+        var options = host.getCompilerOptions();
+        // Emit on each source file
+        if (options.outFile || options.out) {
+            onBundledEmit(host);
+        }
+        else {
+            var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
+            for (var _i = 0, sourceFiles_1 = sourceFiles; _i < sourceFiles_1.length; _i++) {
+                var sourceFile = sourceFiles_1[_i];
+                if (!isDeclarationFile(sourceFile)) {
+                    onSingleFileEmit(host, sourceFile);
+                }
+            }
+        }
+        function onSingleFileEmit(host, sourceFile) {
+            // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
+            // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
+            // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
+            var extension = ".js";
+            if (options.jsx === 1 /* Preserve */) {
+                if (isSourceFileJavaScript(sourceFile)) {
+                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
+                        extension = ".jsx";
+                    }
+                }
+                else if (sourceFile.languageVariant === 1 /* JSX */) {
+                    // TypeScript source file preserving JSX syntax
+                    extension = ".jsx";
+                }
+            }
+            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
+            var emitFileNames = {
+                jsFilePath: jsFilePath,
+                sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
+                declarationFilePath: !isSourceFileJavaScript(sourceFile) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined
+            };
+            action(emitFileNames, [sourceFile], /*isBundledEmit*/ false);
+        }
+        function onBundledEmit(host) {
+            // Can emit only sources that are not declaration file and are either non module code or module with --module or --target es6 specified
+            var bundledSources = ts.filter(host.getSourceFiles(), function (sourceFile) {
+                return !isDeclarationFile(sourceFile) // Not a declaration file
+                    && (!ts.isExternalModule(sourceFile) || !!getEmitModuleKind(options));
+            }); // and not a module, unless module emit enabled
+            if (bundledSources.length) {
+                var jsFilePath = options.outFile || options.out;
+                var emitFileNames = {
+                    jsFilePath: jsFilePath,
+                    sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
+                    declarationFilePath: options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined
+                };
+                action(emitFileNames, bundledSources, /*isBundledEmit*/ true);
+            }
+        }
+        function getSourceMapFilePath(jsFilePath, options) {
+            return options.sourceMap ? jsFilePath + ".map" : undefined;
+        }
+    }
+    ts.forEachExpectedEmitFile = forEachExpectedEmitFile;
+    function getSourceFilePathInNewDir(sourceFile, host, newDirPath) {
+        var sourceFilePath = ts.getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
+        sourceFilePath = sourceFilePath.replace(host.getCommonSourceDirectory(), "");
+        return ts.combinePaths(newDirPath, sourceFilePath);
+    }
+    ts.getSourceFilePathInNewDir = getSourceFilePathInNewDir;
+    function writeFile(host, diagnostics, fileName, data, writeByteOrderMark, sourceFiles) {
+        host.writeFile(fileName, data, writeByteOrderMark, function (hostErrorMessage) {
+            diagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Could_not_write_file_0_Colon_1, fileName, hostErrorMessage));
+        }, sourceFiles);
+    }
+    ts.writeFile = writeFile;
+    function getLineOfLocalPosition(currentSourceFile, pos) {
+        return ts.getLineAndCharacterOfPosition(currentSourceFile, pos).line;
+    }
+    ts.getLineOfLocalPosition = getLineOfLocalPosition;
+    function getLineOfLocalPositionFromLineMap(lineMap, pos) {
+        return ts.computeLineAndCharacterOfPosition(lineMap, pos).line;
+    }
+    ts.getLineOfLocalPositionFromLineMap = getLineOfLocalPositionFromLineMap;
+    function getFirstConstructorWithBody(node) {
+        return ts.forEach(node.members, function (member) {
+            if (member.kind === 148 /* Constructor */ && nodeIsPresent(member.body)) {
+                return member;
+            }
+        });
+    }
+    ts.getFirstConstructorWithBody = getFirstConstructorWithBody;
+    function getSetAccessorTypeAnnotationNode(accessor) {
+        if (accessor && accessor.parameters.length > 0) {
+            var hasThis = accessor.parameters.length === 2 &&
+                accessor.parameters[0].name.kind === 69 /* Identifier */ &&
+                accessor.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */;
+            return accessor.parameters[hasThis ? 1 : 0].type;
+        }
+    }
+    ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
+    function getAllAccessorDeclarations(declarations, accessor) {
+        var firstAccessor;
+        var secondAccessor;
+        var getAccessor;
+        var setAccessor;
+        if (hasDynamicName(accessor)) {
+            firstAccessor = accessor;
+            if (accessor.kind === 149 /* GetAccessor */) {
+                getAccessor = accessor;
+            }
+            else if (accessor.kind === 150 /* SetAccessor */) {
+                setAccessor = accessor;
+            }
+            else {
+                ts.Debug.fail("Accessor has wrong kind");
+            }
+        }
+        else {
+            ts.forEach(declarations, function (member) {
+                if ((member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */)
+                    && (member.flags & 32 /* Static */) === (accessor.flags & 32 /* Static */)) {
+                    var memberName = getPropertyNameForPropertyNameNode(member.name);
+                    var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
+                    if (memberName === accessorName) {
+                        if (!firstAccessor) {
+                            firstAccessor = member;
+                        }
+                        else if (!secondAccessor) {
+                            secondAccessor = member;
+                        }
+                        if (member.kind === 149 /* GetAccessor */ && !getAccessor) {
+                            getAccessor = member;
+                        }
+                        if (member.kind === 150 /* SetAccessor */ && !setAccessor) {
+                            setAccessor = member;
+                        }
+                    }
+                }
+            });
+        }
+        return {
+            firstAccessor: firstAccessor,
+            secondAccessor: secondAccessor,
+            getAccessor: getAccessor,
+            setAccessor: setAccessor
+        };
+    }
+    ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
+    function emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments) {
+        // If the leading comments start on different line than the start of node, write new line
+        if (leadingComments && leadingComments.length && node.pos !== leadingComments[0].pos &&
+            getLineOfLocalPositionFromLineMap(lineMap, node.pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
+            writer.writeLine();
+        }
+    }
+    ts.emitNewLineBeforeLeadingComments = emitNewLineBeforeLeadingComments;
+    function emitComments(text, lineMap, writer, comments, trailingSeparator, newLine, writeComment) {
+        var emitLeadingSpace = !trailingSeparator;
+        ts.forEach(comments, function (comment) {
+            if (emitLeadingSpace) {
+                writer.write(" ");
+                emitLeadingSpace = false;
+            }
+            writeComment(text, lineMap, writer, comment, newLine);
+            if (comment.hasTrailingNewLine) {
+                writer.writeLine();
+            }
+            else if (trailingSeparator) {
+                writer.write(" ");
+            }
+            else {
+                // Emit leading space to separate comment during next comment emit
+                emitLeadingSpace = true;
+            }
+        });
+    }
+    ts.emitComments = emitComments;
+    /**
+     * Detached comment is a comment at the top of file or function body that is separated from
+     * the next statement by space.
+     */
+    function emitDetachedComments(text, lineMap, writer, writeComment, node, newLine, removeComments) {
+        var leadingComments;
+        var currentDetachedCommentInfo;
+        if (removeComments) {
+            // removeComments is true, only reserve pinned comment at the top of file
+            // For example:
+            //      /*! Pinned Comment */
+            //
+            //      var x = 10;
+            if (node.pos === 0) {
+                leadingComments = ts.filter(ts.getLeadingCommentRanges(text, node.pos), isPinnedComment);
+            }
+        }
+        else {
+            // removeComments is false, just get detached as normal and bypass the process to filter comment
+            leadingComments = ts.getLeadingCommentRanges(text, node.pos);
+        }
+        if (leadingComments) {
+            var detachedComments = [];
+            var lastComment = void 0;
+            for (var _i = 0, leadingComments_1 = leadingComments; _i < leadingComments_1.length; _i++) {
+                var comment = leadingComments_1[_i];
+                if (lastComment) {
+                    var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, lastComment.end);
+                    var commentLine = getLineOfLocalPositionFromLineMap(lineMap, comment.pos);
+                    if (commentLine >= lastCommentLine + 2) {
+                        // There was a blank line between the last comment and this comment.  This
+                        // comment is not part of the copyright comments.  Return what we have so
+                        // far.
+                        break;
+                    }
+                }
+                detachedComments.push(comment);
+                lastComment = comment;
+            }
+            if (detachedComments.length) {
+                // All comments look like they could have been part of the copyright header.  Make
+                // sure there is at least one blank line between it and the node.  If not, it's not
+                // a copyright header.
+                var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, ts.lastOrUndefined(detachedComments).end);
+                var nodeLine = getLineOfLocalPositionFromLineMap(lineMap, ts.skipTrivia(text, node.pos));
+                if (nodeLine >= lastCommentLine + 2) {
+                    // Valid detachedComments
+                    emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments);
+                    emitComments(text, lineMap, writer, detachedComments, /*trailingSeparator*/ true, newLine, writeComment);
+                    currentDetachedCommentInfo = { nodePos: node.pos, detachedCommentEndPos: ts.lastOrUndefined(detachedComments).end };
+                }
+            }
+        }
+        return currentDetachedCommentInfo;
+        function isPinnedComment(comment) {
+            return text.charCodeAt(comment.pos + 1) === 42 /* asterisk */ &&
+                text.charCodeAt(comment.pos + 2) === 33 /* exclamation */;
+        }
+    }
+    ts.emitDetachedComments = emitDetachedComments;
+    function writeCommentRange(text, lineMap, writer, comment, newLine) {
+        if (text.charCodeAt(comment.pos + 1) === 42 /* asterisk */) {
+            var firstCommentLineAndCharacter = ts.computeLineAndCharacterOfPosition(lineMap, comment.pos);
+            var lineCount = lineMap.length;
+            var firstCommentLineIndent = void 0;
+            for (var pos = comment.pos, currentLine = firstCommentLineAndCharacter.line; pos < comment.end; currentLine++) {
+                var nextLineStart = (currentLine + 1) === lineCount
+                    ? text.length + 1
+                    : lineMap[currentLine + 1];
+                if (pos !== comment.pos) {
+                    // If we are not emitting first line, we need to write the spaces to adjust the alignment
+                    if (firstCommentLineIndent === undefined) {
+                        firstCommentLineIndent = calculateIndent(text, lineMap[firstCommentLineAndCharacter.line], comment.pos);
+                    }
+                    // These are number of spaces writer is going to write at current indent
+                    var currentWriterIndentSpacing = writer.getIndent() * getIndentSize();
+                    // Number of spaces we want to be writing
+                    // eg: Assume writer indent
+                    // module m {
+                    //         /* starts at character 9 this is line 1
+                    //    * starts at character pos 4 line                        --1  = 8 - 8 + 3
+                    //   More left indented comment */                            --2  = 8 - 8 + 2
+                    //     class c { }
+                    // }
+                    // module m {
+                    //     /* this is line 1 -- Assume current writer indent 8
+                    //      * line                                                --3 = 8 - 4 + 5
+                    //            More right indented comment */                  --4 = 8 - 4 + 11
+                    //     class c { }
+                    // }
+                    var spacesToEmit = currentWriterIndentSpacing - firstCommentLineIndent + calculateIndent(text, pos, nextLineStart);
+                    if (spacesToEmit > 0) {
+                        var numberOfSingleSpacesToEmit = spacesToEmit % getIndentSize();
+                        var indentSizeSpaceString = getIndentString((spacesToEmit - numberOfSingleSpacesToEmit) / getIndentSize());
+                        // Write indent size string ( in eg 1: = "", 2: "" , 3: string with 8 spaces 4: string with 12 spaces
+                        writer.rawWrite(indentSizeSpaceString);
+                        // Emit the single spaces (in eg: 1: 3 spaces, 2: 2 spaces, 3: 1 space, 4: 3 spaces)
+                        while (numberOfSingleSpacesToEmit) {
+                            writer.rawWrite(" ");
+                            numberOfSingleSpacesToEmit--;
+                        }
+                    }
+                    else {
+                        // No spaces to emit write empty string
+                        writer.rawWrite("");
+                    }
+                }
+                // Write the comment line text
+                writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart);
+                pos = nextLineStart;
+            }
+        }
+        else {
+            // Single line comment of style //....
+            writer.write(text.substring(comment.pos, comment.end));
+        }
+    }
+    ts.writeCommentRange = writeCommentRange;
+    function writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart) {
+        var end = Math.min(comment.end, nextLineStart - 1);
+        var currentLineText = text.substring(pos, end).replace(/^\s+|\s+$/g, "");
+        if (currentLineText) {
+            // trimmed forward and ending spaces text
+            writer.write(currentLineText);
+            if (end !== comment.end) {
+                writer.writeLine();
+            }
+        }
+        else {
+            // Empty string - make sure we write empty line
+            writer.writeLiteral(newLine);
+        }
+    }
+    function calculateIndent(text, pos, end) {
+        var currentLineIndent = 0;
+        for (; pos < end && ts.isWhiteSpace(text.charCodeAt(pos)); pos++) {
+            if (text.charCodeAt(pos) === 9 /* tab */) {
+                // Tabs = TabSize = indent size and go to next tabStop
+                currentLineIndent += getIndentSize() - (currentLineIndent % getIndentSize());
+            }
+            else {
+                // Single space
+                currentLineIndent++;
+            }
+        }
+        return currentLineIndent;
+    }
+    function modifierToFlag(token) {
+        switch (token) {
+            case 113 /* StaticKeyword */: return 32 /* Static */;
+            case 112 /* PublicKeyword */: return 4 /* Public */;
+            case 111 /* ProtectedKeyword */: return 16 /* Protected */;
+            case 110 /* PrivateKeyword */: return 8 /* Private */;
+            case 115 /* AbstractKeyword */: return 128 /* Abstract */;
+            case 82 /* ExportKeyword */: return 1 /* Export */;
+            case 122 /* DeclareKeyword */: return 2 /* Ambient */;
+            case 74 /* ConstKeyword */: return 2048 /* Const */;
+            case 77 /* DefaultKeyword */: return 512 /* Default */;
+            case 118 /* AsyncKeyword */: return 256 /* Async */;
+            case 128 /* ReadonlyKeyword */: return 64 /* Readonly */;
+        }
+        return 0;
+    }
+    ts.modifierToFlag = modifierToFlag;
+    function isLeftHandSideExpression(expr) {
+        if (expr) {
+            switch (expr.kind) {
+                case 172 /* PropertyAccessExpression */:
+                case 173 /* ElementAccessExpression */:
+                case 175 /* NewExpression */:
+                case 174 /* CallExpression */:
+                case 196 /* NonNullExpression */:
+                case 241 /* JsxElement */:
+                case 242 /* JsxSelfClosingElement */:
+                case 176 /* TaggedTemplateExpression */:
+                case 170 /* ArrayLiteralExpression */:
+                case 178 /* ParenthesizedExpression */:
+                case 171 /* ObjectLiteralExpression */:
+                case 192 /* ClassExpression */:
+                case 179 /* FunctionExpression */:
+                case 69 /* Identifier */:
+                case 10 /* RegularExpressionLiteral */:
+                case 8 /* NumericLiteral */:
+                case 9 /* StringLiteral */:
+                case 11 /* NoSubstitutionTemplateLiteral */:
+                case 189 /* TemplateExpression */:
+                case 84 /* FalseKeyword */:
+                case 93 /* NullKeyword */:
+                case 97 /* ThisKeyword */:
+                case 99 /* TrueKeyword */:
+                case 95 /* SuperKeyword */:
+                    return true;
+            }
+        }
+        return false;
+    }
+    ts.isLeftHandSideExpression = isLeftHandSideExpression;
+    function isAssignmentOperator(token) {
+        return token >= 56 /* FirstAssignment */ && token <= 68 /* LastAssignment */;
+    }
+    ts.isAssignmentOperator = isAssignmentOperator;
+    function isExpressionWithTypeArgumentsInClassExtendsClause(node) {
+        return node.kind === 194 /* ExpressionWithTypeArguments */ &&
+            node.parent.token === 83 /* ExtendsKeyword */ &&
+            isClassLike(node.parent.parent);
+    }
+    ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
+    // Returns false if this heritage clause element's expression contains something unsupported
+    // (i.e. not a name or dotted name).
+    function isSupportedExpressionWithTypeArguments(node) {
+        return isSupportedExpressionWithTypeArgumentsRest(node.expression);
+    }
+    ts.isSupportedExpressionWithTypeArguments = isSupportedExpressionWithTypeArguments;
+    function isSupportedExpressionWithTypeArgumentsRest(node) {
+        if (node.kind === 69 /* Identifier */) {
+            return true;
+        }
+        else if (isPropertyAccessExpression(node)) {
+            return isSupportedExpressionWithTypeArgumentsRest(node.expression);
+        }
+        else {
+            return false;
+        }
+    }
+    function isRightSideOfQualifiedNameOrPropertyAccess(node) {
+        return (node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node) ||
+            (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node);
+    }
+    ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
+    function isEmptyObjectLiteralOrArrayLiteral(expression) {
+        var kind = expression.kind;
+        if (kind === 171 /* ObjectLiteralExpression */) {
+            return expression.properties.length === 0;
+        }
+        if (kind === 170 /* ArrayLiteralExpression */) {
+            return expression.elements.length === 0;
+        }
+        return false;
+    }
+    ts.isEmptyObjectLiteralOrArrayLiteral = isEmptyObjectLiteralOrArrayLiteral;
+    function getLocalSymbolForExportDefault(symbol) {
+        return symbol && symbol.valueDeclaration && (symbol.valueDeclaration.flags & 512 /* Default */) ? symbol.valueDeclaration.localSymbol : undefined;
+    }
+    ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
+    function hasJavaScriptFileExtension(fileName) {
+        return ts.forEach(ts.supportedJavascriptExtensions, function (extension) { return ts.fileExtensionIs(fileName, extension); });
+    }
+    ts.hasJavaScriptFileExtension = hasJavaScriptFileExtension;
+    /**
+     * Replace each instance of non-ascii characters by one, two, three, or four escape sequences
+     * representing the UTF-8 encoding of the character, and return the expanded char code list.
+     */
+    function getExpandedCharCodes(input) {
+        var output = [];
+        var length = input.length;
+        for (var i = 0; i < length; i++) {
+            var charCode = input.charCodeAt(i);
+            // handel utf8
+            if (charCode < 0x80) {
+                output.push(charCode);
+            }
+            else if (charCode < 0x800) {
+                output.push((charCode >> 6) | 192);
+                output.push((charCode & 63) | 128);
+            }
+            else if (charCode < 0x10000) {
+                output.push((charCode >> 12) | 224);
+                output.push(((charCode >> 6) & 63) | 128);
+                output.push((charCode & 63) | 128);
+            }
+            else if (charCode < 0x20000) {
+                output.push((charCode >> 18) | 240);
+                output.push(((charCode >> 12) & 63) | 128);
+                output.push(((charCode >> 6) & 63) | 128);
+                output.push((charCode & 63) | 128);
+            }
+            else {
+                ts.Debug.assert(false, "Unexpected code point");
+            }
+        }
+        return output;
+    }
+    /**
+     * Serialize an object graph into a JSON string. This is intended only for use on an acyclic graph
+     * as the fallback implementation does not check for circular references by default.
+     */
+    ts.stringify = typeof JSON !== "undefined" && JSON.stringify
+        ? JSON.stringify
+        : stringifyFallback;
+    /**
+     * Serialize an object graph into a JSON string.
+     */
+    function stringifyFallback(value) {
+        // JSON.stringify returns `undefined` here, instead of the string "undefined".
+        return value === undefined ? undefined : stringifyValue(value);
+    }
+    function stringifyValue(value) {
+        return typeof value === "string" ? "\"" + escapeString(value) + "\""
+            : typeof value === "number" ? isFinite(value) ? String(value) : "null"
+                : typeof value === "boolean" ? value ? "true" : "false"
+                    : typeof value === "object" && value ? ts.isArray(value) ? cycleCheck(stringifyArray, value) : cycleCheck(stringifyObject, value)
+                        : "null";
+    }
+    function cycleCheck(cb, value) {
+        ts.Debug.assert(!value.hasOwnProperty("__cycle"), "Converting circular structure to JSON");
+        value.__cycle = true;
+        var result = cb(value);
+        delete value.__cycle;
+        return result;
+    }
+    function stringifyArray(value) {
+        return "[" + ts.reduceLeft(value, stringifyElement, "") + "]";
+    }
+    function stringifyElement(memo, value) {
+        return (memo ? memo + "," : memo) + stringifyValue(value);
+    }
+    function stringifyObject(value) {
+        return "{" + ts.reduceProperties(value, stringifyProperty, "") + "}";
+    }
+    function stringifyProperty(memo, value, key) {
+        return value === undefined || typeof value === "function" || key === "__cycle" ? memo
+            : (memo ? memo + "," : memo) + ("\"" + escapeString(key) + "\":" + stringifyValue(value));
+    }
+    var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+    /**
+     * Converts a string to a base-64 encoded ASCII string.
+     */
+    function convertToBase64(input) {
+        var result = "";
+        var charCodes = getExpandedCharCodes(input);
+        var i = 0;
+        var length = charCodes.length;
+        var byte1, byte2, byte3, byte4;
+        while (i < length) {
+            // Convert every 6-bits in the input 3 character points
+            // into a base64 digit
+            byte1 = charCodes[i] >> 2;
+            byte2 = (charCodes[i] & 3) << 4 | charCodes[i + 1] >> 4;
+            byte3 = (charCodes[i + 1] & 15) << 2 | charCodes[i + 2] >> 6;
+            byte4 = charCodes[i + 2] & 63;
+            // We are out of characters in the input, set the extra
+            // digits to 64 (padding character).
+            if (i + 1 >= length) {
+                byte3 = byte4 = 64;
+            }
+            else if (i + 2 >= length) {
+                byte4 = 64;
+            }
+            // Write to the output
+            result += base64Digits.charAt(byte1) + base64Digits.charAt(byte2) + base64Digits.charAt(byte3) + base64Digits.charAt(byte4);
+            i += 3;
+        }
+        return result;
+    }
+    ts.convertToBase64 = convertToBase64;
+    function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
+        return !ts.isRootedDiskPath(absoluteOrRelativePath)
+            ? absoluteOrRelativePath
+            : ts.getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, /* isAbsolutePathAnUrl */ false);
+    }
+    ts.convertToRelativePath = convertToRelativePath;
+    var carriageReturnLineFeed = "\r\n";
+    var lineFeed = "\n";
+    function getNewLineCharacter(options) {
+        if (options.newLine === 0 /* CarriageReturnLineFeed */) {
+            return carriageReturnLineFeed;
+        }
+        else if (options.newLine === 1 /* LineFeed */) {
+            return lineFeed;
+        }
+        else if (ts.sys) {
+            return ts.sys.newLine;
+        }
+        return carriageReturnLineFeed;
+    }
+    ts.getNewLineCharacter = getNewLineCharacter;
+    function isWatchSet(options) {
+        // Firefox has Object.prototype.watch
+        return options.watch && options.hasOwnProperty("watch");
+    }
+    ts.isWatchSet = isWatchSet;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getDefaultLibFileName(options) {
+        return options.target === 2 /* ES6 */ ? "lib.es6.d.ts" : "lib.d.ts";
+    }
+    ts.getDefaultLibFileName = getDefaultLibFileName;
+    function textSpanEnd(span) {
+        return span.start + span.length;
+    }
+    ts.textSpanEnd = textSpanEnd;
+    function textSpanIsEmpty(span) {
+        return span.length === 0;
+    }
+    ts.textSpanIsEmpty = textSpanIsEmpty;
+    function textSpanContainsPosition(span, position) {
+        return position >= span.start && position < textSpanEnd(span);
+    }
+    ts.textSpanContainsPosition = textSpanContainsPosition;
+    // Returns true if 'span' contains 'other'.
+    function textSpanContainsTextSpan(span, other) {
+        return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
+    }
+    ts.textSpanContainsTextSpan = textSpanContainsTextSpan;
+    function textSpanOverlapsWith(span, other) {
+        var overlapStart = Math.max(span.start, other.start);
+        var overlapEnd = Math.min(textSpanEnd(span), textSpanEnd(other));
+        return overlapStart < overlapEnd;
+    }
+    ts.textSpanOverlapsWith = textSpanOverlapsWith;
+    function textSpanOverlap(span1, span2) {
+        var overlapStart = Math.max(span1.start, span2.start);
+        var overlapEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
+        if (overlapStart < overlapEnd) {
+            return createTextSpanFromBounds(overlapStart, overlapEnd);
+        }
+        return undefined;
+    }
+    ts.textSpanOverlap = textSpanOverlap;
+    function textSpanIntersectsWithTextSpan(span, other) {
+        return other.start <= textSpanEnd(span) && textSpanEnd(other) >= span.start;
+    }
+    ts.textSpanIntersectsWithTextSpan = textSpanIntersectsWithTextSpan;
+    function textSpanIntersectsWith(span, start, length) {
+        var end = start + length;
+        return start <= textSpanEnd(span) && end >= span.start;
+    }
+    ts.textSpanIntersectsWith = textSpanIntersectsWith;
+    function decodedTextSpanIntersectsWith(start1, length1, start2, length2) {
+        var end1 = start1 + length1;
+        var end2 = start2 + length2;
+        return start2 <= end1 && end2 >= start1;
+    }
+    ts.decodedTextSpanIntersectsWith = decodedTextSpanIntersectsWith;
+    function textSpanIntersectsWithPosition(span, position) {
+        return position <= textSpanEnd(span) && position >= span.start;
+    }
+    ts.textSpanIntersectsWithPosition = textSpanIntersectsWithPosition;
+    function textSpanIntersection(span1, span2) {
+        var intersectStart = Math.max(span1.start, span2.start);
+        var intersectEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
+        if (intersectStart <= intersectEnd) {
+            return createTextSpanFromBounds(intersectStart, intersectEnd);
+        }
+        return undefined;
+    }
+    ts.textSpanIntersection = textSpanIntersection;
+    function createTextSpan(start, length) {
+        if (start < 0) {
+            throw new Error("start < 0");
+        }
+        if (length < 0) {
+            throw new Error("length < 0");
+        }
+        return { start: start, length: length };
+    }
+    ts.createTextSpan = createTextSpan;
+    function createTextSpanFromBounds(start, end) {
+        return createTextSpan(start, end - start);
+    }
+    ts.createTextSpanFromBounds = createTextSpanFromBounds;
+    function textChangeRangeNewSpan(range) {
+        return createTextSpan(range.span.start, range.newLength);
+    }
+    ts.textChangeRangeNewSpan = textChangeRangeNewSpan;
+    function textChangeRangeIsUnchanged(range) {
+        return textSpanIsEmpty(range.span) && range.newLength === 0;
+    }
+    ts.textChangeRangeIsUnchanged = textChangeRangeIsUnchanged;
+    function createTextChangeRange(span, newLength) {
+        if (newLength < 0) {
+            throw new Error("newLength < 0");
+        }
+        return { span: span, newLength: newLength };
+    }
+    ts.createTextChangeRange = createTextChangeRange;
+    ts.unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
+    /**
+     * Called to merge all the changes that occurred across several versions of a script snapshot
+     * into a single change.  i.e. if a user keeps making successive edits to a script we will
+     * have a text change from V1 to V2, V2 to V3, ..., Vn.
+     *
+     * This function will then merge those changes into a single change range valid between V1 and
+     * Vn.
+     */
+    function collapseTextChangeRangesAcrossMultipleVersions(changes) {
+        if (changes.length === 0) {
+            return ts.unchangedTextChangeRange;
+        }
+        if (changes.length === 1) {
+            return changes[0];
+        }
+        // We change from talking about { { oldStart, oldLength }, newLength } to { oldStart, oldEnd, newEnd }
+        // as it makes things much easier to reason about.
+        var change0 = changes[0];
+        var oldStartN = change0.span.start;
+        var oldEndN = textSpanEnd(change0.span);
+        var newEndN = oldStartN + change0.newLength;
+        for (var i = 1; i < changes.length; i++) {
+            var nextChange = changes[i];
+            // Consider the following case:
+            // i.e. two edits.  The first represents the text change range { { 10, 50 }, 30 }.  i.e. The span starting
+            // at 10, with length 50 is reduced to length 30.  The second represents the text change range { { 30, 30 }, 40 }.
+            // i.e. the span starting at 30 with length 30 is increased to length 40.
+            //
+            //      0         10        20        30        40        50        60        70        80        90        100
+            //      -------------------------------------------------------------------------------------------------------
+            //                |                                                 /
+            //                |                                            /----
+            //  T1            |                                       /----
+            //                |                                  /----
+            //                |                             /----
+            //      -------------------------------------------------------------------------------------------------------
+            //                                     |                            \
+            //                                     |                               \
+            //   T2                                |                                 \
+            //                                     |                                   \
+            //                                     |                                      \
+            //      -------------------------------------------------------------------------------------------------------
+            //
+            // Merging these turns out to not be too difficult.  First, determining the new start of the change is trivial
+            // it's just the min of the old and new starts.  i.e.:
+            //
+            //      0         10        20        30        40        50        60        70        80        90        100
+            //      ------------------------------------------------------------*------------------------------------------
+            //                |                                                 /
+            //                |                                            /----
+            //  T1            |                                       /----
+            //                |                                  /----
+            //                |                             /----
+            //      ----------------------------------------$-------------------$------------------------------------------
+            //                .                    |                            \
+            //                .                    |                               \
+            //   T2           .                    |                                 \
+            //                .                    |                                   \
+            //                .                    |                                      \
+            //      ----------------------------------------------------------------------*--------------------------------
+            //
+            // (Note the dots represent the newly inferred start.
+            // Determining the new and old end is also pretty simple.  Basically it boils down to paying attention to the
+            // absolute positions at the asterisks, and the relative change between the dollar signs. Basically, we see
+            // which if the two $'s precedes the other, and we move that one forward until they line up.  in this case that
+            // means:
+            //
+            //      0         10        20        30        40        50        60        70        80        90        100
+            //      --------------------------------------------------------------------------------*----------------------
+            //                |                                                                     /
+            //                |                                                                /----
+            //  T1            |                                                           /----
+            //                |                                                      /----
+            //                |                                                 /----
+            //      ------------------------------------------------------------$------------------------------------------
+            //                .                    |                            \
+            //                .                    |                               \
+            //   T2           .                    |                                 \
+            //                .                    |                                   \
+            //                .                    |                                      \
+            //      ----------------------------------------------------------------------*--------------------------------
+            //
+            // In other words (in this case), we're recognizing that the second edit happened after where the first edit
+            // ended with a delta of 20 characters (60 - 40).  Thus, if we go back in time to where the first edit started
+            // that's the same as if we started at char 80 instead of 60.
+            //
+            // As it so happens, the same logic applies if the second edit precedes the first edit.  In that case rather
+            // than pushing the first edit forward to match the second, we'll push the second edit forward to match the
+            // first.
+            //
+            // In this case that means we have { oldStart: 10, oldEnd: 80, newEnd: 70 } or, in TextChangeRange
+            // semantics: { { start: 10, length: 70 }, newLength: 60 }
+            //
+            // The math then works out as follows.
+            // If we have { oldStart1, oldEnd1, newEnd1 } and { oldStart2, oldEnd2, newEnd2 } then we can compute the
+            // final result like so:
+            //
+            // {
+            //      oldStart3: Min(oldStart1, oldStart2),
+            //      oldEnd3  : Max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1)),
+            //      newEnd3  : Max(newEnd2, newEnd2 + (newEnd1 - oldEnd2))
+            // }
+            var oldStart1 = oldStartN;
+            var oldEnd1 = oldEndN;
+            var newEnd1 = newEndN;
+            var oldStart2 = nextChange.span.start;
+            var oldEnd2 = textSpanEnd(nextChange.span);
+            var newEnd2 = oldStart2 + nextChange.newLength;
+            oldStartN = Math.min(oldStart1, oldStart2);
+            oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
+            newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
+        }
+        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), /*newLength:*/ newEndN - oldStartN);
+    }
+    ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
+    function getTypeParameterOwner(d) {
+        if (d && d.kind === 141 /* TypeParameter */) {
+            for (var current = d; current; current = current.parent) {
+                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 222 /* InterfaceDeclaration */) {
+                    return current;
+                }
+            }
+        }
+    }
+    ts.getTypeParameterOwner = getTypeParameterOwner;
+    function isParameterPropertyDeclaration(node) {
+        return node.flags & 92 /* ParameterPropertyModifier */ && node.parent.kind === 148 /* Constructor */ && ts.isClassLike(node.parent.parent);
+    }
+    ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
+    function startsWith(str, prefix) {
+        return str.lastIndexOf(prefix, 0) === 0;
+    }
+    ts.startsWith = startsWith;
+    function endsWith(str, suffix) {
+        var expectedPos = str.length - suffix.length;
+        return str.indexOf(suffix, expectedPos) === expectedPos;
+    }
+    ts.endsWith = endsWith;
+})(ts || (ts = {}));
+/// <reference path="utilities.ts"/>
+/// <reference path="scanner.ts"/>
+var ts;
+(function (ts) {
+    /* @internal */ ts.parseTime = 0;
+    var NodeConstructor;
+    var SourceFileConstructor;
+    function createNode(kind, pos, end) {
+        if (kind === 256 /* SourceFile */) {
+            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
+        }
+        else {
+            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
+        }
+    }
+    ts.createNode = createNode;
+    function visitNode(cbNode, node) {
+        if (node) {
+            return cbNode(node);
+        }
+    }
+    function visitNodeArray(cbNodes, nodes) {
+        if (nodes) {
+            return cbNodes(nodes);
+        }
+    }
+    function visitEachNode(cbNode, nodes) {
+        if (nodes) {
+            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
+                var node = nodes_1[_i];
+                var result = cbNode(node);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+    }
+    // Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
+    // stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
+    // embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
+    // a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
+    function forEachChild(node, cbNode, cbNodeArray) {
+        if (!node) {
+            return;
+        }
+        // The visitXXX functions could be written as local functions that close over the cbNode and cbNodeArray
+        // callback parameters, but that causes a closure allocation for each invocation with noticeable effects
+        // on performance.
+        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
+        var cbNodes = cbNodeArray || cbNode;
+        switch (node.kind) {
+            case 139 /* QualifiedName */:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.right);
+            case 141 /* TypeParameter */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.constraint) ||
+                    visitNode(cbNode, node.expression);
+            case 254 /* ShorthandPropertyAssignment */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.equalsToken) ||
+                    visitNode(cbNode, node.objectAssignmentInitializer);
+            case 142 /* Parameter */:
+            case 145 /* PropertyDeclaration */:
+            case 144 /* PropertySignature */:
+            case 253 /* PropertyAssignment */:
+            case 218 /* VariableDeclaration */:
+            case 169 /* BindingElement */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.dotDotDotToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.initializer);
+            case 156 /* FunctionType */:
+            case 157 /* ConstructorType */:
+            case 151 /* CallSignature */:
+            case 152 /* ConstructSignature */:
+            case 153 /* IndexSignature */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+            case 148 /* Constructor */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 179 /* FunctionExpression */:
+            case 220 /* FunctionDeclaration */:
+            case 180 /* ArrowFunction */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.equalsGreaterThanToken) ||
+                    visitNode(cbNode, node.body);
+            case 155 /* TypeReference */:
+                return visitNode(cbNode, node.typeName) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 154 /* TypePredicate */:
+                return visitNode(cbNode, node.parameterName) ||
+                    visitNode(cbNode, node.type);
+            case 158 /* TypeQuery */:
+                return visitNode(cbNode, node.exprName);
+            case 159 /* TypeLiteral */:
+                return visitNodes(cbNodes, node.members);
+            case 160 /* ArrayType */:
+                return visitNode(cbNode, node.elementType);
+            case 161 /* TupleType */:
+                return visitNodes(cbNodes, node.elementTypes);
+            case 162 /* UnionType */:
+            case 163 /* IntersectionType */:
+                return visitNodes(cbNodes, node.types);
+            case 164 /* ParenthesizedType */:
+                return visitNode(cbNode, node.type);
+            case 167 /* ObjectBindingPattern */:
+            case 168 /* ArrayBindingPattern */:
+                return visitNodes(cbNodes, node.elements);
+            case 170 /* ArrayLiteralExpression */:
+                return visitNodes(cbNodes, node.elements);
+            case 171 /* ObjectLiteralExpression */:
+                return visitNodes(cbNodes, node.properties);
+            case 172 /* PropertyAccessExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.dotToken) ||
+                    visitNode(cbNode, node.name);
+            case 173 /* ElementAccessExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.argumentExpression);
+            case 174 /* CallExpression */:
+            case 175 /* NewExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments) ||
+                    visitNodes(cbNodes, node.arguments);
+            case 176 /* TaggedTemplateExpression */:
+                return visitNode(cbNode, node.tag) ||
+                    visitNode(cbNode, node.template);
+            case 177 /* TypeAssertionExpression */:
+                return visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.expression);
+            case 178 /* ParenthesizedExpression */:
+                return visitNode(cbNode, node.expression);
+            case 181 /* DeleteExpression */:
+                return visitNode(cbNode, node.expression);
+            case 182 /* TypeOfExpression */:
+                return visitNode(cbNode, node.expression);
+            case 183 /* VoidExpression */:
+                return visitNode(cbNode, node.expression);
+            case 185 /* PrefixUnaryExpression */:
+                return visitNode(cbNode, node.operand);
+            case 190 /* YieldExpression */:
+                return visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.expression);
+            case 184 /* AwaitExpression */:
+                return visitNode(cbNode, node.expression);
+            case 186 /* PostfixUnaryExpression */:
+                return visitNode(cbNode, node.operand);
+            case 187 /* BinaryExpression */:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.operatorToken) ||
+                    visitNode(cbNode, node.right);
+            case 195 /* AsExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.type);
+            case 196 /* NonNullExpression */:
+                return visitNode(cbNode, node.expression);
+            case 188 /* ConditionalExpression */:
+                return visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.whenTrue) ||
+                    visitNode(cbNode, node.colonToken) ||
+                    visitNode(cbNode, node.whenFalse);
+            case 191 /* SpreadElementExpression */:
+                return visitNode(cbNode, node.expression);
+            case 199 /* Block */:
+            case 226 /* ModuleBlock */:
+                return visitNodes(cbNodes, node.statements);
+            case 256 /* SourceFile */:
+                return visitNodes(cbNodes, node.statements) ||
+                    visitNode(cbNode, node.endOfFileToken);
+            case 200 /* VariableStatement */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.declarationList);
+            case 219 /* VariableDeclarationList */:
+                return visitNodes(cbNodes, node.declarations);
+            case 202 /* ExpressionStatement */:
+                return visitNode(cbNode, node.expression);
+            case 203 /* IfStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.thenStatement) ||
+                    visitNode(cbNode, node.elseStatement);
+            case 204 /* DoStatement */:
+                return visitNode(cbNode, node.statement) ||
+                    visitNode(cbNode, node.expression);
+            case 205 /* WhileStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 206 /* ForStatement */:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.incrementor) ||
+                    visitNode(cbNode, node.statement);
+            case 207 /* ForInStatement */:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 208 /* ForOfStatement */:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 209 /* ContinueStatement */:
+            case 210 /* BreakStatement */:
+                return visitNode(cbNode, node.label);
+            case 211 /* ReturnStatement */:
+                return visitNode(cbNode, node.expression);
+            case 212 /* WithStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 213 /* SwitchStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.caseBlock);
+            case 227 /* CaseBlock */:
+                return visitNodes(cbNodes, node.clauses);
+            case 249 /* CaseClause */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.statements);
+            case 250 /* DefaultClause */:
+                return visitNodes(cbNodes, node.statements);
+            case 214 /* LabeledStatement */:
+                return visitNode(cbNode, node.label) ||
+                    visitNode(cbNode, node.statement);
+            case 215 /* ThrowStatement */:
+                return visitNode(cbNode, node.expression);
+            case 216 /* TryStatement */:
+                return visitNode(cbNode, node.tryBlock) ||
+                    visitNode(cbNode, node.catchClause) ||
+                    visitNode(cbNode, node.finallyBlock);
+            case 252 /* CatchClause */:
+                return visitNode(cbNode, node.variableDeclaration) ||
+                    visitNode(cbNode, node.block);
+            case 143 /* Decorator */:
+                return visitNode(cbNode, node.expression);
+            case 221 /* ClassDeclaration */:
+            case 192 /* ClassExpression */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 222 /* InterfaceDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 223 /* TypeAliasDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNode(cbNode, node.type);
+            case 224 /* EnumDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.members);
+            case 255 /* EnumMember */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 225 /* ModuleDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.body);
+            case 229 /* ImportEqualsDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.moduleReference);
+            case 230 /* ImportDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.importClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 231 /* ImportClause */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.namedBindings);
+            case 228 /* NamespaceExportDeclaration */:
+                return visitNode(cbNode, node.name);
+            case 232 /* NamespaceImport */:
+                return visitNode(cbNode, node.name);
+            case 233 /* NamedImports */:
+            case 237 /* NamedExports */:
+                return visitNodes(cbNodes, node.elements);
+            case 236 /* ExportDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.exportClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 234 /* ImportSpecifier */:
+            case 238 /* ExportSpecifier */:
+                return visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.name);
+            case 235 /* ExportAssignment */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.expression);
+            case 189 /* TemplateExpression */:
+                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
+            case 197 /* TemplateSpan */:
+                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
+            case 140 /* ComputedPropertyName */:
+                return visitNode(cbNode, node.expression);
+            case 251 /* HeritageClause */:
+                return visitNodes(cbNodes, node.types);
+            case 194 /* ExpressionWithTypeArguments */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 240 /* ExternalModuleReference */:
+                return visitNode(cbNode, node.expression);
+            case 239 /* MissingDeclaration */:
+                return visitNodes(cbNodes, node.decorators);
+            case 241 /* JsxElement */:
+                return visitNode(cbNode, node.openingElement) ||
+                    visitNodes(cbNodes, node.children) ||
+                    visitNode(cbNode, node.closingElement);
+            case 242 /* JsxSelfClosingElement */:
+            case 243 /* JsxOpeningElement */:
+                return visitNode(cbNode, node.tagName) ||
+                    visitNodes(cbNodes, node.attributes);
+            case 246 /* JsxAttribute */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 247 /* JsxSpreadAttribute */:
+                return visitNode(cbNode, node.expression);
+            case 248 /* JsxExpression */:
+                return visitNode(cbNode, node.expression);
+            case 245 /* JsxClosingElement */:
+                return visitNode(cbNode, node.tagName);
+            case 257 /* JSDocTypeExpression */:
+                return visitNode(cbNode, node.type);
+            case 261 /* JSDocUnionType */:
+                return visitNodes(cbNodes, node.types);
+            case 262 /* JSDocTupleType */:
+                return visitNodes(cbNodes, node.types);
+            case 260 /* JSDocArrayType */:
+                return visitNode(cbNode, node.elementType);
+            case 264 /* JSDocNonNullableType */:
+                return visitNode(cbNode, node.type);
+            case 263 /* JSDocNullableType */:
+                return visitNode(cbNode, node.type);
+            case 265 /* JSDocRecordType */:
+                return visitNodes(cbNodes, node.members);
+            case 267 /* JSDocTypeReference */:
+                return visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 268 /* JSDocOptionalType */:
+                return visitNode(cbNode, node.type);
+            case 269 /* JSDocFunctionType */:
+                return visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 270 /* JSDocVariadicType */:
+                return visitNode(cbNode, node.type);
+            case 271 /* JSDocConstructorType */:
+                return visitNode(cbNode, node.type);
+            case 272 /* JSDocThisType */:
+                return visitNode(cbNode, node.type);
+            case 266 /* JSDocRecordMember */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.type);
+            case 273 /* JSDocComment */:
+                return visitNodes(cbNodes, node.tags);
+            case 275 /* JSDocParameterTag */:
+                return visitNode(cbNode, node.preParameterName) ||
+                    visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.postParameterName);
+            case 276 /* JSDocReturnTag */:
+                return visitNode(cbNode, node.typeExpression);
+            case 277 /* JSDocTypeTag */:
+                return visitNode(cbNode, node.typeExpression);
+            case 278 /* JSDocTemplateTag */:
+                return visitNodes(cbNodes, node.typeParameters);
+            case 279 /* JSDocTypedefTag */:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.jsDocTypeLiteral);
+            case 281 /* JSDocTypeLiteral */:
+                return visitNodes(cbNodes, node.jsDocPropertyTags);
+            case 280 /* JSDocPropertyTag */:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.name);
+        }
+    }
+    ts.forEachChild = forEachChild;
+    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
+        if (setParentNodes === void 0) { setParentNodes = false; }
+        var start = new Date().getTime();
+        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, /*syntaxCursor*/ undefined, setParentNodes, scriptKind);
+        ts.parseTime += new Date().getTime() - start;
+        return result;
+    }
+    ts.createSourceFile = createSourceFile;
+    function isExternalModule(file) {
+        return file.externalModuleIndicator !== undefined;
+    }
+    ts.isExternalModule = isExternalModule;
+    // Produces a new SourceFile for the 'newText' provided. The 'textChangeRange' parameter
+    // indicates what changed between the 'text' that this SourceFile has and the 'newText'.
+    // The SourceFile will be created with the compiler attempting to reuse as many nodes from
+    // this file as possible.
+    //
+    // Note: this function mutates nodes from this SourceFile. That means any existing nodes
+    // from this SourceFile that are being held onto may change as a result (including
+    // becoming detached from any SourceFile).  It is recommended that this SourceFile not
+    // be used once 'update' is called on it.
+    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+        return IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
+    }
+    ts.updateSourceFile = updateSourceFile;
+    /* @internal */
+    function parseIsolatedJSDocComment(content, start, length) {
+        var result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
+        if (result && result.jsDocComment) {
+            // because the jsDocComment was parsed out of the source file, it might
+            // not be covered by the fixupParentReferences.
+            Parser.fixupParentReferences(result.jsDocComment);
+        }
+        return result;
+    }
+    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+    /* @internal */
+    // Exposed only for testing.
+    function parseJSDocTypeExpressionForTests(content, start, length) {
+        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
+    }
+    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+    // Implement the parser as a singleton module.  We do this for perf reasons because creating
+    // parser instances can actually be expensive enough to impact us on projects with many source
+    // files.
+    var Parser;
+    (function (Parser) {
+        // Share a single scanner across all calls to parse a source file.  This helps speed things
+        // up by avoiding the cost of creating/compiling scanners over and over again.
+        var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ true);
+        var disallowInAndDecoratorContext = 4194304 /* DisallowInContext */ | 16777216 /* DecoratorContext */;
+        // capture constructors in 'initializeState' to avoid null checks
+        var NodeConstructor;
+        var SourceFileConstructor;
+        var sourceFile;
+        var parseDiagnostics;
+        var syntaxCursor;
+        var token;
+        var sourceText;
+        var nodeCount;
+        var identifiers;
+        var identifierCount;
+        var parsingContext;
+        // Flags that dictate what parsing context we're in.  For example:
+        // Whether or not we are in strict parsing mode.  All that changes in strict parsing mode is
+        // that some tokens that would be considered identifiers may be considered keywords.
+        //
+        // When adding more parser context flags, consider which is the more common case that the
+        // flag will be in.  This should be the 'false' state for that flag.  The reason for this is
+        // that we don't store data in our nodes unless the value is in the *non-default* state.  So,
+        // for example, more often than code 'allows-in' (or doesn't 'disallow-in').  We opt for
+        // 'disallow-in' set to 'false'.  Otherwise, if we had 'allowsIn' set to 'true', then almost
+        // all nodes would need extra state on them to store this info.
+        //
+        // Note:  'allowIn' and 'allowYield' track 1:1 with the [in] and [yield] concepts in the ES6
+        // grammar specification.
+        //
+        // An important thing about these context concepts.  By default they are effectively inherited
+        // while parsing through every grammar production.  i.e. if you don't change them, then when
+        // you parse a sub-production, it will have the same context values as the parent production.
+        // This is great most of the time.  After all, consider all the 'expression' grammar productions
+        // and how nearly all of them pass along the 'in' and 'yield' context values:
+        //
+        // EqualityExpression[In, Yield] :
+        //      RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] == RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] != RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] === RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] !== RelationalExpression[?In, ?Yield]
+        //
+        // Where you have to be careful is then understanding what the points are in the grammar
+        // where the values are *not* passed along.  For example:
+        //
+        // SingleNameBinding[Yield,GeneratorParameter]
+        //      [+GeneratorParameter]BindingIdentifier[Yield] Initializer[In]opt
+        //      [~GeneratorParameter]BindingIdentifier[?Yield]Initializer[In, ?Yield]opt
+        //
+        // Here this is saying that if the GeneratorParameter context flag is set, that we should
+        // explicitly set the 'yield' context flag to false before calling into the BindingIdentifier
+        // and we should explicitly unset the 'yield' context flag before calling into the Initializer.
+        // production.  Conversely, if the GeneratorParameter context flag is not set, then we
+        // should leave the 'yield' context flag alone.
+        //
+        // Getting this all correct is tricky and requires careful reading of the grammar to
+        // understand when these values should be changed versus when they should be inherited.
+        //
+        // Note: it should not be necessary to save/restore these flags during speculative/lookahead
+        // parsing.  These context flags are naturally stored and restored through normal recursive
+        // descent parsing and unwinding.
+        var contextFlags;
+        // Whether or not we've had a parse error since creating the last AST node.  If we have
+        // encountered an error, it will be stored on the next AST node we create.  Parse errors
+        // can be broken down into three categories:
+        //
+        // 1) An error that occurred during scanning.  For example, an unterminated literal, or a
+        //    character that was completely not understood.
+        //
+        // 2) A token was expected, but was not present.  This type of error is commonly produced
+        //    by the 'parseExpected' function.
+        //
+        // 3) A token was present that no parsing function was able to consume.  This type of error
+        //    only occurs in the 'abortParsingListOrMoveToNextToken' function when the parser
+        //    decides to skip the token.
+        //
+        // In all of these cases, we want to mark the next node as having had an error before it.
+        // With this mark, we can know in incremental settings if this node can be reused, or if
+        // we have to reparse it.  If we don't keep this information around, we may just reuse the
+        // node.  in that event we would then not produce the same errors as we did before, causing
+        // significant confusion problems.
+        //
+        // Note: it is necessary that this value be saved/restored during speculative/lookahead
+        // parsing.  During lookahead parsing, we will often create a node.  That node will have
+        // this value attached, and then this value will be set back to 'false'.  If we decide to
+        // rewind, we must get back to the same value we had prior to the lookahead.
+        //
+        // Note: any errors at the end of the file that do not precede a regular node, should get
+        // attached to the EOF token.
+        var parseErrorBeforeNextFinishedNode = false;
+        function parseSourceFile(fileName, _sourceText, languageVersion, _syntaxCursor, setParentNodes, scriptKind) {
+            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
+            initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind);
+            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
+            clearState();
+            return result;
+        }
+        Parser.parseSourceFile = parseSourceFile;
+        function getLanguageVariant(scriptKind) {
+            // .tsx and .jsx files are treated as jsx language variant.
+            return scriptKind === 4 /* TSX */ || scriptKind === 2 /* JSX */ || scriptKind === 1 /* JS */ ? 1 /* JSX */ : 0 /* Standard */;
+        }
+        function initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind) {
+            NodeConstructor = ts.objectAllocator.getNodeConstructor();
+            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
+            sourceText = _sourceText;
+            syntaxCursor = _syntaxCursor;
+            parseDiagnostics = [];
+            parsingContext = 0;
+            identifiers = {};
+            identifierCount = 0;
+            nodeCount = 0;
+            contextFlags = scriptKind === 1 /* JS */ || scriptKind === 2 /* JSX */ ? 134217728 /* JavaScriptFile */ : 0 /* None */;
+            parseErrorBeforeNextFinishedNode = false;
+            // Initialize and prime the scanner before parsing the source elements.
+            scanner.setText(sourceText);
+            scanner.setOnError(scanError);
+            scanner.setScriptTarget(languageVersion);
+            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
+        }
+        function clearState() {
+            // Clear out the text the scanner is pointing at, so it doesn't keep anything alive unnecessarily.
+            scanner.setText("");
+            scanner.setOnError(undefined);
+            // Clear any data.  We don't want to accidentally hold onto it for too long.
+            parseDiagnostics = undefined;
+            sourceFile = undefined;
+            identifiers = undefined;
+            syntaxCursor = undefined;
+            sourceText = undefined;
+        }
+        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
+            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
+            sourceFile.flags = contextFlags;
+            // Prime the scanner.
+            token = nextToken();
+            processReferenceComments(sourceFile);
+            sourceFile.statements = parseList(0 /* SourceElements */, parseStatement);
+            ts.Debug.assert(token === 1 /* EndOfFileToken */);
+            sourceFile.endOfFileToken = parseTokenNode();
+            setExternalModuleIndicator(sourceFile);
+            sourceFile.nodeCount = nodeCount;
+            sourceFile.identifierCount = identifierCount;
+            sourceFile.identifiers = identifiers;
+            sourceFile.parseDiagnostics = parseDiagnostics;
+            if (setParentNodes) {
+                fixupParentReferences(sourceFile);
+            }
+            return sourceFile;
+        }
+        function addJSDocComment(node) {
+            if (contextFlags & 134217728 /* JavaScriptFile */) {
+                var comments = ts.getLeadingCommentRangesOfNode(node, sourceFile);
+                if (comments) {
+                    for (var _i = 0, comments_1 = comments; _i < comments_1.length; _i++) {
+                        var comment = comments_1[_i];
+                        var jsDocComment = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
+                        if (!jsDocComment) {
+                            continue;
+                        }
+                        if (!node.jsDocComments) {
+                            node.jsDocComments = [];
+                        }
+                        node.jsDocComments.push(jsDocComment);
+                    }
+                }
+            }
+            return node;
+        }
+        function fixupParentReferences(rootNode) {
+            // normally parent references are set during binding. However, for clients that only need
+            // a syntax tree, and no semantic features, then the binding process is an unnecessary
+            // overhead.  This functions allows us to set all the parents, without all the expense of
+            // binding.
+            var parent = rootNode;
+            forEachChild(rootNode, visitNode);
+            return;
+            function visitNode(n) {
+                // walk down setting parents that differ from the parent we think it should be.  This
+                // allows us to quickly bail out of setting parents for subtrees during incremental
+                // parsing
+                if (n.parent !== parent) {
+                    n.parent = parent;
+                    var saveParent = parent;
+                    parent = n;
+                    forEachChild(n, visitNode);
+                    if (n.jsDocComments) {
+                        for (var _i = 0, _a = n.jsDocComments; _i < _a.length; _i++) {
+                            var jsDocComment = _a[_i];
+                            jsDocComment.parent = n;
+                            parent = jsDocComment;
+                            forEachChild(jsDocComment, visitNode);
+                        }
+                    }
+                    parent = saveParent;
+                }
+            }
+        }
+        Parser.fixupParentReferences = fixupParentReferences;
+        function createSourceFile(fileName, languageVersion, scriptKind) {
+            // code from createNode is inlined here so createNode won't have to deal with special case of creating source files
+            // this is quite rare comparing to other nodes and createNode should be as fast as possible
+            var sourceFile = new SourceFileConstructor(256 /* SourceFile */, /*pos*/ 0, /* end */ sourceText.length);
+            nodeCount++;
+            sourceFile.text = sourceText;
+            sourceFile.bindDiagnostics = [];
+            sourceFile.languageVersion = languageVersion;
+            sourceFile.fileName = ts.normalizePath(fileName);
+            sourceFile.languageVariant = getLanguageVariant(scriptKind);
+            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts");
+            sourceFile.scriptKind = scriptKind;
+            return sourceFile;
+        }
+        function setContextFlag(val, flag) {
+            if (val) {
+                contextFlags |= flag;
+            }
+            else {
+                contextFlags &= ~flag;
+            }
+        }
+        function setDisallowInContext(val) {
+            setContextFlag(val, 4194304 /* DisallowInContext */);
+        }
+        function setYieldContext(val) {
+            setContextFlag(val, 8388608 /* YieldContext */);
+        }
+        function setDecoratorContext(val) {
+            setContextFlag(val, 16777216 /* DecoratorContext */);
+        }
+        function setAwaitContext(val) {
+            setContextFlag(val, 33554432 /* AwaitContext */);
+        }
+        function doOutsideOfContext(context, func) {
+            // contextFlagsToClear will contain only the context flags that are
+            // currently set that we need to temporarily clear
+            // We don't just blindly reset to the previous flags to ensure
+            // that we do not mutate cached flags for the incremental
+            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
+            // HasAggregatedChildData).
+            var contextFlagsToClear = context & contextFlags;
+            if (contextFlagsToClear) {
+                // clear the requested context flags
+                setContextFlag(/*val*/ false, contextFlagsToClear);
+                var result = func();
+                // restore the context flags we just cleared
+                setContextFlag(/*val*/ true, contextFlagsToClear);
+                return result;
+            }
+            // no need to do anything special as we are not in any of the requested contexts
+            return func();
+        }
+        function doInsideOfContext(context, func) {
+            // contextFlagsToSet will contain only the context flags that
+            // are not currently set that we need to temporarily enable.
+            // We don't just blindly reset to the previous flags to ensure
+            // that we do not mutate cached flags for the incremental
+            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
+            // HasAggregatedChildData).
+            var contextFlagsToSet = context & ~contextFlags;
+            if (contextFlagsToSet) {
+                // set the requested context flags
+                setContextFlag(/*val*/ true, contextFlagsToSet);
+                var result = func();
+                // reset the context flags we just set
+                setContextFlag(/*val*/ false, contextFlagsToSet);
+                return result;
+            }
+            // no need to do anything special as we are already in all of the requested contexts
+            return func();
+        }
+        function allowInAnd(func) {
+            return doOutsideOfContext(4194304 /* DisallowInContext */, func);
+        }
+        function disallowInAnd(func) {
+            return doInsideOfContext(4194304 /* DisallowInContext */, func);
+        }
+        function doInYieldContext(func) {
+            return doInsideOfContext(8388608 /* YieldContext */, func);
+        }
+        function doInDecoratorContext(func) {
+            return doInsideOfContext(16777216 /* DecoratorContext */, func);
+        }
+        function doInAwaitContext(func) {
+            return doInsideOfContext(33554432 /* AwaitContext */, func);
+        }
+        function doOutsideOfAwaitContext(func) {
+            return doOutsideOfContext(33554432 /* AwaitContext */, func);
+        }
+        function doInYieldAndAwaitContext(func) {
+            return doInsideOfContext(8388608 /* YieldContext */ | 33554432 /* AwaitContext */, func);
+        }
+        function inContext(flags) {
+            return (contextFlags & flags) !== 0;
+        }
+        function inYieldContext() {
+            return inContext(8388608 /* YieldContext */);
+        }
+        function inDisallowInContext() {
+            return inContext(4194304 /* DisallowInContext */);
+        }
+        function inDecoratorContext() {
+            return inContext(16777216 /* DecoratorContext */);
+        }
+        function inAwaitContext() {
+            return inContext(33554432 /* AwaitContext */);
+        }
+        function parseErrorAtCurrentToken(message, arg0) {
+            var start = scanner.getTokenPos();
+            var length = scanner.getTextPos() - start;
+            parseErrorAtPosition(start, length, message, arg0);
+        }
+        function parseErrorAtPosition(start, length, message, arg0) {
+            // Don't report another error if it would just be at the same position as the last error.
+            var lastError = ts.lastOrUndefined(parseDiagnostics);
+            if (!lastError || start !== lastError.start) {
+                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
+            }
+            // Mark that we've encountered an error.  We'll set an appropriate bit on the next
+            // node we finish so that it can't be reused incrementally.
+            parseErrorBeforeNextFinishedNode = true;
+        }
+        function scanError(message, length) {
+            var pos = scanner.getTextPos();
+            parseErrorAtPosition(pos, length || 0, message);
+        }
+        function getNodePos() {
+            return scanner.getStartPos();
+        }
+        function getNodeEnd() {
+            return scanner.getStartPos();
+        }
+        function nextToken() {
+            return token = scanner.scan();
+        }
+        function reScanGreaterToken() {
+            return token = scanner.reScanGreaterToken();
+        }
+        function reScanSlashToken() {
+            return token = scanner.reScanSlashToken();
+        }
+        function reScanTemplateToken() {
+            return token = scanner.reScanTemplateToken();
+        }
+        function scanJsxIdentifier() {
+            return token = scanner.scanJsxIdentifier();
+        }
+        function scanJsxText() {
+            return token = scanner.scanJsxToken();
+        }
+        function speculationHelper(callback, isLookAhead) {
+            // Keep track of the state we'll need to rollback to if lookahead fails (or if the
+            // caller asked us to always reset our state).
+            var saveToken = token;
+            var saveParseDiagnosticsLength = parseDiagnostics.length;
+            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+            // Note: it is not actually necessary to save/restore the context flags here.  That's
+            // because the saving/restoring of these flags happens naturally through the recursive
+            // descent nature of our parser.  However, we still store this here just so we can
+            // assert that that invariant holds.
+            var saveContextFlags = contextFlags;
+            // If we're only looking ahead, then tell the scanner to only lookahead as well.
+            // Otherwise, if we're actually speculatively parsing, then tell the scanner to do the
+            // same.
+            var result = isLookAhead
+                ? scanner.lookAhead(callback)
+                : scanner.tryScan(callback);
+            ts.Debug.assert(saveContextFlags === contextFlags);
+            // If our callback returned something 'falsy' or we're just looking ahead,
+            // then unconditionally restore us to where we were.
+            if (!result || isLookAhead) {
+                token = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+            }
+            return result;
+        }
+        /** Invokes the provided callback then unconditionally restores the parser to the state it
+         * was in immediately prior to invoking the callback.  The result of invoking the callback
+         * is returned from this function.
+         */
+        function lookAhead(callback) {
+            return speculationHelper(callback, /*isLookAhead*/ true);
+        }
+        /** Invokes the provided callback.  If the callback returns something falsy, then it restores
+         * the parser to the state it was in immediately prior to invoking the callback.  If the
+         * callback returns something truthy, then the parser state is not rolled back.  The result
+         * of invoking the callback is returned from this function.
+         */
+        function tryParse(callback) {
+            return speculationHelper(callback, /*isLookAhead*/ false);
+        }
+        // Ignore strict mode flag because we will report an error in type checker instead.
+        function isIdentifier() {
+            if (token === 69 /* Identifier */) {
+                return true;
+            }
+            // If we have a 'yield' keyword, and we're in the [yield] context, then 'yield' is
+            // considered a keyword and is not an identifier.
+            if (token === 114 /* YieldKeyword */ && inYieldContext()) {
+                return false;
+            }
+            // If we have a 'await' keyword, and we're in the [Await] context, then 'await' is
+            // considered a keyword and is not an identifier.
+            if (token === 119 /* AwaitKeyword */ && inAwaitContext()) {
+                return false;
+            }
+            return token > 105 /* LastReservedWord */;
+        }
+        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
+            if (shouldAdvance === void 0) { shouldAdvance = true; }
+            if (token === kind) {
+                if (shouldAdvance) {
+                    nextToken();
+                }
+                return true;
+            }
+            // Report specific message if provided with one.  Otherwise, report generic fallback message.
+            if (diagnosticMessage) {
+                parseErrorAtCurrentToken(diagnosticMessage);
+            }
+            else {
+                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
+            }
+            return false;
+        }
+        function parseOptional(t) {
+            if (token === t) {
+                nextToken();
+                return true;
+            }
+            return false;
+        }
+        function parseOptionalToken(t) {
+            if (token === t) {
+                return parseTokenNode();
+            }
+            return undefined;
+        }
+        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            return parseOptionalToken(t) ||
+                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
+        }
+        function parseTokenNode() {
+            var node = createNode(token);
+            nextToken();
+            return finishNode(node);
+        }
+        function canParseSemicolon() {
+            // If there's a real semicolon, then we can always parse it out.
+            if (token === 23 /* SemicolonToken */) {
+                return true;
+            }
+            // We can parse out an optional semicolon in ASI cases in the following cases.
+            return token === 16 /* CloseBraceToken */ || token === 1 /* EndOfFileToken */ || scanner.hasPrecedingLineBreak();
+        }
+        function parseSemicolon() {
+            if (canParseSemicolon()) {
+                if (token === 23 /* SemicolonToken */) {
+                    // consume the semicolon if it was explicitly provided.
+                    nextToken();
+                }
+                return true;
+            }
+            else {
+                return parseExpected(23 /* SemicolonToken */);
+            }
+        }
+        // note: this function creates only node
+        function createNode(kind, pos) {
+            nodeCount++;
+            if (!(pos >= 0)) {
+                pos = scanner.getStartPos();
+            }
+            return new NodeConstructor(kind, pos, pos);
+        }
+        function finishNode(node, end) {
+            node.end = end === undefined ? scanner.getStartPos() : end;
+            if (contextFlags) {
+                node.flags |= contextFlags;
+            }
+            // Keep track on the node if we encountered an error while parsing it.  If we did, then
+            // we cannot reuse the node incrementally.  Once we've marked this node, clear out the
+            // flag so that we don't mark any subsequent nodes.
+            if (parseErrorBeforeNextFinishedNode) {
+                parseErrorBeforeNextFinishedNode = false;
+                node.flags |= 67108864 /* ThisNodeHasError */;
+            }
+            return node;
+        }
+        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            if (reportAtCurrentPosition) {
+                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
+            }
+            else {
+                parseErrorAtCurrentToken(diagnosticMessage, arg0);
+            }
+            var result = createNode(kind, scanner.getStartPos());
+            result.text = "";
+            return finishNode(result);
+        }
+        function internIdentifier(text) {
+            text = ts.escapeIdentifier(text);
+            return ts.hasProperty(identifiers, text) ? identifiers[text] : (identifiers[text] = text);
+        }
+        // An identifier that starts with two underscores has an extra underscore character prepended to it to avoid issues
+        // with magic property names like '__proto__'. The 'identifiers' object is used to share a single string instance for
+        // each identifier in order to reduce memory consumption.
+        function createIdentifier(isIdentifier, diagnosticMessage) {
+            identifierCount++;
+            if (isIdentifier) {
+                var node = createNode(69 /* Identifier */);
+                // Store original token kind if it is not just an Identifier so we can report appropriate error later in type checker
+                if (token !== 69 /* Identifier */) {
+                    node.originalKeywordKind = token;
+                }
+                node.text = internIdentifier(scanner.getTokenValue());
+                nextToken();
+                return finishNode(node);
+            }
+            return createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
+        }
+        function parseIdentifier(diagnosticMessage) {
+            return createIdentifier(isIdentifier(), diagnosticMessage);
+        }
+        function parseIdentifierName() {
+            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token));
+        }
+        function isLiteralPropertyName() {
+            return ts.tokenIsIdentifierOrKeyword(token) ||
+                token === 9 /* StringLiteral */ ||
+                token === 8 /* NumericLiteral */;
+        }
+        function parsePropertyNameWorker(allowComputedPropertyNames) {
+            if (token === 9 /* StringLiteral */ || token === 8 /* NumericLiteral */) {
+                return parseLiteralNode(/*internName*/ true);
+            }
+            if (allowComputedPropertyNames && token === 19 /* OpenBracketToken */) {
+                return parseComputedPropertyName();
+            }
+            return parseIdentifierName();
+        }
+        function parsePropertyName() {
+            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ true);
+        }
+        function parseSimplePropertyName() {
+            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ false);
+        }
+        function isSimplePropertyName() {
+            return token === 9 /* StringLiteral */ || token === 8 /* NumericLiteral */ || ts.tokenIsIdentifierOrKeyword(token);
+        }
+        function parseComputedPropertyName() {
+            // PropertyName [Yield]:
+            //      LiteralPropertyName
+            //      ComputedPropertyName[?Yield]
+            var node = createNode(140 /* ComputedPropertyName */);
+            parseExpected(19 /* OpenBracketToken */);
+            // We parse any expression (including a comma expression). But the grammar
+            // says that only an assignment expression is allowed, so the grammar checker
+            // will error if it sees a comma expression.
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseBracketToken */);
+            return finishNode(node);
+        }
+        function parseContextualModifier(t) {
+            return token === t && tryParse(nextTokenCanFollowModifier);
+        }
+        function nextTokenIsOnSameLineAndCanFollowModifier() {
+            nextToken();
+            if (scanner.hasPrecedingLineBreak()) {
+                return false;
+            }
+            return canFollowModifier();
+        }
+        function nextTokenCanFollowModifier() {
+            if (token === 74 /* ConstKeyword */) {
+                // 'const' is only a modifier if followed by 'enum'.
+                return nextToken() === 81 /* EnumKeyword */;
+            }
+            if (token === 82 /* ExportKeyword */) {
+                nextToken();
+                if (token === 77 /* DefaultKeyword */) {
+                    return lookAhead(nextTokenIsClassOrFunction);
+                }
+                return token !== 37 /* AsteriskToken */ && token !== 116 /* AsKeyword */ && token !== 15 /* OpenBraceToken */ && canFollowModifier();
+            }
+            if (token === 77 /* DefaultKeyword */) {
+                return nextTokenIsClassOrFunction();
+            }
+            if (token === 113 /* StaticKeyword */) {
+                nextToken();
+                return canFollowModifier();
+            }
+            return nextTokenIsOnSameLineAndCanFollowModifier();
+        }
+        function parseAnyContextualModifier() {
+            return ts.isModifierKind(token) && tryParse(nextTokenCanFollowModifier);
+        }
+        function canFollowModifier() {
+            return token === 19 /* OpenBracketToken */
+                || token === 15 /* OpenBraceToken */
+                || token === 37 /* AsteriskToken */
+                || isLiteralPropertyName();
+        }
+        function nextTokenIsClassOrFunction() {
+            nextToken();
+            return token === 73 /* ClassKeyword */ || token === 87 /* FunctionKeyword */;
+        }
+        // True if positioned at the start of a list element
+        function isListElement(parsingContext, inErrorRecovery) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return true;
+            }
+            switch (parsingContext) {
+                case 0 /* SourceElements */:
+                case 1 /* BlockStatements */:
+                case 3 /* SwitchClauseStatements */:
+                    // If we're in error recovery, then we don't want to treat ';' as an empty statement.
+                    // The problem is that ';' can show up in far too many contexts, and if we see one
+                    // and assume it's a statement, then we may bail out inappropriately from whatever
+                    // we're parsing.  For example, if we have a semicolon in the middle of a class, then
+                    // we really don't want to assume the class is over and we're on a statement in the
+                    // outer module.  We just want to consume and move on.
+                    return !(token === 23 /* SemicolonToken */ && inErrorRecovery) && isStartOfStatement();
+                case 2 /* SwitchClauses */:
+                    return token === 71 /* CaseKeyword */ || token === 77 /* DefaultKeyword */;
+                case 4 /* TypeMembers */:
+                    return lookAhead(isTypeMemberStart);
+                case 5 /* ClassMembers */:
+                    // We allow semicolons as class elements (as specified by ES6) as long as we're
+                    // not in error recovery.  If we're in error recovery, we don't want an errant
+                    // semicolon to be treated as a class member (since they're almost always used
+                    // for statements.
+                    return lookAhead(isClassMemberStart) || (token === 23 /* SemicolonToken */ && !inErrorRecovery);
+                case 6 /* EnumMembers */:
+                    // Include open bracket computed properties. This technically also lets in indexers,
+                    // which would be a candidate for improved error reporting.
+                    return token === 19 /* OpenBracketToken */ || isLiteralPropertyName();
+                case 12 /* ObjectLiteralMembers */:
+                    return token === 19 /* OpenBracketToken */ || token === 37 /* AsteriskToken */ || isLiteralPropertyName();
+                case 9 /* ObjectBindingElements */:
+                    return token === 19 /* OpenBracketToken */ || isLiteralPropertyName();
+                case 7 /* HeritageClauseElement */:
+                    // If we see { } then only consume it as an expression if it is followed by , or {
+                    // That way we won't consume the body of a class in its heritage clause.
+                    if (token === 15 /* OpenBraceToken */) {
+                        return lookAhead(isValidHeritageClauseObjectLiteral);
+                    }
+                    if (!inErrorRecovery) {
+                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    }
+                    else {
+                        // If we're in error recovery we tighten up what we're willing to match.
+                        // That way we don't treat something like "this" as a valid heritage clause
+                        // element during recovery.
+                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    }
+                case 8 /* VariableDeclarations */:
+                    return isIdentifierOrPattern();
+                case 10 /* ArrayBindingElements */:
+                    return token === 24 /* CommaToken */ || token === 22 /* DotDotDotToken */ || isIdentifierOrPattern();
+                case 17 /* TypeParameters */:
+                    return isIdentifier();
+                case 11 /* ArgumentExpressions */:
+                case 15 /* ArrayLiteralMembers */:
+                    return token === 24 /* CommaToken */ || token === 22 /* DotDotDotToken */ || isStartOfExpression();
+                case 16 /* Parameters */:
+                    return isStartOfParameter();
+                case 18 /* TypeArguments */:
+                case 19 /* TupleElementTypes */:
+                    return token === 24 /* CommaToken */ || isStartOfType();
+                case 20 /* HeritageClauses */:
+                    return isHeritageClause();
+                case 21 /* ImportOrExportSpecifiers */:
+                    return ts.tokenIsIdentifierOrKeyword(token);
+                case 13 /* JsxAttributes */:
+                    return ts.tokenIsIdentifierOrKeyword(token) || token === 15 /* OpenBraceToken */;
+                case 14 /* JsxChildren */:
+                    return true;
+                case 22 /* JSDocFunctionParameters */:
+                case 23 /* JSDocTypeArguments */:
+                case 25 /* JSDocTupleTypes */:
+                    return JSDocParser.isJSDocType();
+                case 24 /* JSDocRecordMembers */:
+                    return isSimplePropertyName();
+            }
+            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
+        }
+        function isValidHeritageClauseObjectLiteral() {
+            ts.Debug.assert(token === 15 /* OpenBraceToken */);
+            if (nextToken() === 16 /* CloseBraceToken */) {
+                // if we see  "extends {}" then only treat the {} as what we're extending (and not
+                // the class body) if we have:
+                //
+                //      extends {} {
+                //      extends {},
+                //      extends {} extends
+                //      extends {} implements
+                var next = nextToken();
+                return next === 24 /* CommaToken */ || next === 15 /* OpenBraceToken */ || next === 83 /* ExtendsKeyword */ || next === 106 /* ImplementsKeyword */;
+            }
+            return true;
+        }
+        function nextTokenIsIdentifier() {
+            nextToken();
+            return isIdentifier();
+        }
+        function nextTokenIsIdentifierOrKeyword() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token);
+        }
+        function isHeritageClauseExtendsOrImplementsKeyword() {
+            if (token === 106 /* ImplementsKeyword */ ||
+                token === 83 /* ExtendsKeyword */) {
+                return lookAhead(nextTokenIsStartOfExpression);
+            }
+            return false;
+        }
+        function nextTokenIsStartOfExpression() {
+            nextToken();
+            return isStartOfExpression();
+        }
+        // True if positioned at a list terminator
+        function isListTerminator(kind) {
+            if (token === 1 /* EndOfFileToken */) {
+                // Being at the end of the file ends all lists.
+                return true;
+            }
+            switch (kind) {
+                case 1 /* BlockStatements */:
+                case 2 /* SwitchClauses */:
+                case 4 /* TypeMembers */:
+                case 5 /* ClassMembers */:
+                case 6 /* EnumMembers */:
+                case 12 /* ObjectLiteralMembers */:
+                case 9 /* ObjectBindingElements */:
+                case 21 /* ImportOrExportSpecifiers */:
+                    return token === 16 /* CloseBraceToken */;
+                case 3 /* SwitchClauseStatements */:
+                    return token === 16 /* CloseBraceToken */ || token === 71 /* CaseKeyword */ || token === 77 /* DefaultKeyword */;
+                case 7 /* HeritageClauseElement */:
+                    return token === 15 /* OpenBraceToken */ || token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */;
+                case 8 /* VariableDeclarations */:
+                    return isVariableDeclaratorListTerminator();
+                case 17 /* TypeParameters */:
+                    // Tokens other than '>' are here for better error recovery
+                    return token === 27 /* GreaterThanToken */ || token === 17 /* OpenParenToken */ || token === 15 /* OpenBraceToken */ || token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */;
+                case 11 /* ArgumentExpressions */:
+                    // Tokens other than ')' are here for better error recovery
+                    return token === 18 /* CloseParenToken */ || token === 23 /* SemicolonToken */;
+                case 15 /* ArrayLiteralMembers */:
+                case 19 /* TupleElementTypes */:
+                case 10 /* ArrayBindingElements */:
+                    return token === 20 /* CloseBracketToken */;
+                case 16 /* Parameters */:
+                    // Tokens other than ')' and ']' (the latter for index signatures) are here for better error recovery
+                    return token === 18 /* CloseParenToken */ || token === 20 /* CloseBracketToken */ /*|| token === SyntaxKind.OpenBraceToken*/;
+                case 18 /* TypeArguments */:
+                    // Tokens other than '>' are here for better error recovery
+                    return token === 27 /* GreaterThanToken */ || token === 17 /* OpenParenToken */;
+                case 20 /* HeritageClauses */:
+                    return token === 15 /* OpenBraceToken */ || token === 16 /* CloseBraceToken */;
+                case 13 /* JsxAttributes */:
+                    return token === 27 /* GreaterThanToken */ || token === 39 /* SlashToken */;
+                case 14 /* JsxChildren */:
+                    return token === 25 /* LessThanToken */ && lookAhead(nextTokenIsSlash);
+                case 22 /* JSDocFunctionParameters */:
+                    return token === 18 /* CloseParenToken */ || token === 54 /* ColonToken */ || token === 16 /* CloseBraceToken */;
+                case 23 /* JSDocTypeArguments */:
+                    return token === 27 /* GreaterThanToken */ || token === 16 /* CloseBraceToken */;
+                case 25 /* JSDocTupleTypes */:
+                    return token === 20 /* CloseBracketToken */ || token === 16 /* CloseBraceToken */;
+                case 24 /* JSDocRecordMembers */:
+                    return token === 16 /* CloseBraceToken */;
+            }
+        }
+        function isVariableDeclaratorListTerminator() {
+            // If we can consume a semicolon (either explicitly, or with ASI), then consider us done
+            // with parsing the list of  variable declarators.
+            if (canParseSemicolon()) {
+                return true;
+            }
+            // in the case where we're parsing the variable declarator of a 'for-in' statement, we
+            // are done if we see an 'in' keyword in front of us. Same with for-of
+            if (isInOrOfKeyword(token)) {
+                return true;
+            }
+            // ERROR RECOVERY TWEAK:
+            // For better error recovery, if we see an '=>' then we just stop immediately.  We've got an
+            // arrow function here and it's going to be very unlikely that we'll resynchronize and get
+            // another variable declaration.
+            if (token === 34 /* EqualsGreaterThanToken */) {
+                return true;
+            }
+            // Keep trying to parse out variable declarators.
+            return false;
+        }
+        // True if positioned at element or terminator of the current list or any enclosing list
+        function isInSomeParsingContext() {
+            for (var kind = 0; kind < 26 /* Count */; kind++) {
+                if (parsingContext & (1 << kind)) {
+                    if (isListElement(kind, /*inErrorRecovery*/ true) || isListTerminator(kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        // Parses a list of elements
+        function parseList(kind, parseElement) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = [];
+            result.pos = getNodePos();
+            while (!isListTerminator(kind)) {
+                if (isListElement(kind, /*inErrorRecovery*/ false)) {
+                    var element = parseListElement(kind, parseElement);
+                    result.push(element);
+                    continue;
+                }
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
+                }
+            }
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function parseListElement(parsingContext, parseElement) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return consumeNode(node);
+            }
+            return parseElement();
+        }
+        function currentNode(parsingContext) {
+            // If there is an outstanding parse error that we've encountered, but not attached to
+            // some node, then we cannot get a node from the old source tree.  This is because we
+            // want to mark the next node we encounter as being unusable.
+            //
+            // Note: This may be too conservative.  Perhaps we could reuse the node and set the bit
+            // on it (or its leftmost child) as having the error.  For now though, being conservative
+            // is nice and likely won't ever affect perf.
+            if (parseErrorBeforeNextFinishedNode) {
+                return undefined;
+            }
+            if (!syntaxCursor) {
+                // if we don't have a cursor, we could never return a node from the old tree.
+                return undefined;
+            }
+            var node = syntaxCursor.currentNode(scanner.getStartPos());
+            // Can't reuse a missing node.
+            if (ts.nodeIsMissing(node)) {
+                return undefined;
+            }
+            // Can't reuse a node that intersected the change range.
+            if (node.intersectsChange) {
+                return undefined;
+            }
+            // Can't reuse a node that contains a parse error.  This is necessary so that we
+            // produce the same set of errors again.
+            if (ts.containsParseError(node)) {
+                return undefined;
+            }
+            // We can only reuse a node if it was parsed under the same strict mode that we're
+            // currently in.  i.e. if we originally parsed a node in non-strict mode, but then
+            // the user added 'using strict' at the top of the file, then we can't use that node
+            // again as the presence of strict mode may cause us to parse the tokens in the file
+            // differently.
+            //
+            // Note: we *can* reuse tokens when the strict mode changes.  That's because tokens
+            // are unaffected by strict mode.  It's just the parser will decide what to do with it
+            // differently depending on what mode it is in.
+            //
+            // This also applies to all our other context flags as well.
+            var nodeContextFlags = node.flags & 197132288 /* ContextFlags */;
+            if (nodeContextFlags !== contextFlags) {
+                return undefined;
+            }
+            // Ok, we have a node that looks like it could be reused.  Now verify that it is valid
+            // in the current list parsing context that we're currently at.
+            if (!canReuseNode(node, parsingContext)) {
+                return undefined;
+            }
+            return node;
+        }
+        function consumeNode(node) {
+            // Move the scanner so it is after the node we just consumed.
+            scanner.setTextPos(node.end);
+            nextToken();
+            return node;
+        }
+        function canReuseNode(node, parsingContext) {
+            switch (parsingContext) {
+                case 5 /* ClassMembers */:
+                    return isReusableClassMember(node);
+                case 2 /* SwitchClauses */:
+                    return isReusableSwitchClause(node);
+                case 0 /* SourceElements */:
+                case 1 /* BlockStatements */:
+                case 3 /* SwitchClauseStatements */:
+                    return isReusableStatement(node);
+                case 6 /* EnumMembers */:
+                    return isReusableEnumMember(node);
+                case 4 /* TypeMembers */:
+                    return isReusableTypeMember(node);
+                case 8 /* VariableDeclarations */:
+                    return isReusableVariableDeclaration(node);
+                case 16 /* Parameters */:
+                    return isReusableParameter(node);
+                // Any other lists we do not care about reusing nodes in.  But feel free to add if
+                // you can do so safely.  Danger areas involve nodes that may involve speculative
+                // parsing.  If speculative parsing is involved with the node, then the range the
+                // parser reached while looking ahead might be in the edited range (see the example
+                // in canReuseVariableDeclaratorNode for a good case of this).
+                case 20 /* HeritageClauses */:
+                // This would probably be safe to reuse.  There is no speculative parsing with
+                // heritage clauses.
+                case 17 /* TypeParameters */:
+                // This would probably be safe to reuse.  There is no speculative parsing with
+                // type parameters.  Note that that's because type *parameters* only occur in
+                // unambiguous *type* contexts.  While type *arguments* occur in very ambiguous
+                // *expression* contexts.
+                case 19 /* TupleElementTypes */:
+                // This would probably be safe to reuse.  There is no speculative parsing with
+                // tuple types.
+                // Technically, type argument list types are probably safe to reuse.  While
+                // speculative parsing is involved with them (since type argument lists are only
+                // produced from speculative parsing a < as a type argument list), we only have
+                // the types because speculative parsing succeeded.  Thus, the lookahead never
+                // went past the end of the list and rewound.
+                case 18 /* TypeArguments */:
+                // Note: these are almost certainly not safe to ever reuse.  Expressions commonly
+                // need a large amount of lookahead, and we should not reuse them as they may
+                // have actually intersected the edit.
+                case 11 /* ArgumentExpressions */:
+                // This is not safe to reuse for the same reason as the 'AssignmentExpression'
+                // cases.  i.e. a property assignment may end with an expression, and thus might
+                // have lookahead far beyond it's old node.
+                case 12 /* ObjectLiteralMembers */:
+                // This is probably not safe to reuse.  There can be speculative parsing with
+                // type names in a heritage clause.  There can be generic names in the type
+                // name list, and there can be left hand side expressions (which can have type
+                // arguments.)
+                case 7 /* HeritageClauseElement */:
+                // Perhaps safe to reuse, but it's unlikely we'd see more than a dozen attributes
+                // on any given element. Same for children.
+                case 13 /* JsxAttributes */:
+                case 14 /* JsxChildren */:
+            }
+            return false;
+        }
+        function isReusableClassMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 148 /* Constructor */:
+                    case 153 /* IndexSignature */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 145 /* PropertyDeclaration */:
+                    case 198 /* SemicolonClassElement */:
+                        return true;
+                    case 147 /* MethodDeclaration */:
+                        // Method declarations are not necessarily reusable.  An object-literal
+                        // may have a method calls "constructor(...)" and we must reparse that
+                        // into an actual .ConstructorDeclaration.
+                        var methodDeclaration = node;
+                        var nameIsConstructor = methodDeclaration.name.kind === 69 /* Identifier */ &&
+                            methodDeclaration.name.originalKeywordKind === 121 /* ConstructorKeyword */;
+                        return !nameIsConstructor;
+                }
+            }
+            return false;
+        }
+        function isReusableSwitchClause(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 249 /* CaseClause */:
+                    case 250 /* DefaultClause */:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableStatement(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 220 /* FunctionDeclaration */:
+                    case 200 /* VariableStatement */:
+                    case 199 /* Block */:
+                    case 203 /* IfStatement */:
+                    case 202 /* ExpressionStatement */:
+                    case 215 /* ThrowStatement */:
+                    case 211 /* ReturnStatement */:
+                    case 213 /* SwitchStatement */:
+                    case 210 /* BreakStatement */:
+                    case 209 /* ContinueStatement */:
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                    case 206 /* ForStatement */:
+                    case 205 /* WhileStatement */:
+                    case 212 /* WithStatement */:
+                    case 201 /* EmptyStatement */:
+                    case 216 /* TryStatement */:
+                    case 214 /* LabeledStatement */:
+                    case 204 /* DoStatement */:
+                    case 217 /* DebuggerStatement */:
+                    case 230 /* ImportDeclaration */:
+                    case 229 /* ImportEqualsDeclaration */:
+                    case 236 /* ExportDeclaration */:
+                    case 235 /* ExportAssignment */:
+                    case 225 /* ModuleDeclaration */:
+                    case 221 /* ClassDeclaration */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 223 /* TypeAliasDeclaration */:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableEnumMember(node) {
+            return node.kind === 255 /* EnumMember */;
+        }
+        function isReusableTypeMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 152 /* ConstructSignature */:
+                    case 146 /* MethodSignature */:
+                    case 153 /* IndexSignature */:
+                    case 144 /* PropertySignature */:
+                    case 151 /* CallSignature */:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableVariableDeclaration(node) {
+            if (node.kind !== 218 /* VariableDeclaration */) {
+                return false;
+            }
+            // Very subtle incremental parsing bug.  Consider the following code:
+            //
+            //      let v = new List < A, B
+            //
+            // This is actually legal code.  It's a list of variable declarators "v = new List<A"
+            // on one side and "B" on the other. If you then change that to:
+            //
+            //      let v = new List < A, B >()
+            //
+            // then we have a problem.  "v = new List<A" doesn't intersect the change range, so we
+            // start reparsing at "B" and we completely fail to handle this properly.
+            //
+            // In order to prevent this, we do not allow a variable declarator to be reused if it
+            // has an initializer.
+            var variableDeclarator = node;
+            return variableDeclarator.initializer === undefined;
+        }
+        function isReusableParameter(node) {
+            if (node.kind !== 142 /* Parameter */) {
+                return false;
+            }
+            // See the comment in isReusableVariableDeclaration for why we do this.
+            var parameter = node;
+            return parameter.initializer === undefined;
+        }
+        // Returns true if we should abort parsing.
+        function abortParsingListOrMoveToNextToken(kind) {
+            parseErrorAtCurrentToken(parsingContextErrors(kind));
+            if (isInSomeParsingContext()) {
+                return true;
+            }
+            nextToken();
+            return false;
+        }
+        function parsingContextErrors(context) {
+            switch (context) {
+                case 0 /* SourceElements */: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 1 /* BlockStatements */: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 2 /* SwitchClauses */: return ts.Diagnostics.case_or_default_expected;
+                case 3 /* SwitchClauseStatements */: return ts.Diagnostics.Statement_expected;
+                case 4 /* TypeMembers */: return ts.Diagnostics.Property_or_signature_expected;
+                case 5 /* ClassMembers */: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
+                case 6 /* EnumMembers */: return ts.Diagnostics.Enum_member_expected;
+                case 7 /* HeritageClauseElement */: return ts.Diagnostics.Expression_expected;
+                case 8 /* VariableDeclarations */: return ts.Diagnostics.Variable_declaration_expected;
+                case 9 /* ObjectBindingElements */: return ts.Diagnostics.Property_destructuring_pattern_expected;
+                case 10 /* ArrayBindingElements */: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
+                case 11 /* ArgumentExpressions */: return ts.Diagnostics.Argument_expression_expected;
+                case 12 /* ObjectLiteralMembers */: return ts.Diagnostics.Property_assignment_expected;
+                case 15 /* ArrayLiteralMembers */: return ts.Diagnostics.Expression_or_comma_expected;
+                case 16 /* Parameters */: return ts.Diagnostics.Parameter_declaration_expected;
+                case 17 /* TypeParameters */: return ts.Diagnostics.Type_parameter_declaration_expected;
+                case 18 /* TypeArguments */: return ts.Diagnostics.Type_argument_expected;
+                case 19 /* TupleElementTypes */: return ts.Diagnostics.Type_expected;
+                case 20 /* HeritageClauses */: return ts.Diagnostics.Unexpected_token_expected;
+                case 21 /* ImportOrExportSpecifiers */: return ts.Diagnostics.Identifier_expected;
+                case 13 /* JsxAttributes */: return ts.Diagnostics.Identifier_expected;
+                case 14 /* JsxChildren */: return ts.Diagnostics.Identifier_expected;
+                case 22 /* JSDocFunctionParameters */: return ts.Diagnostics.Parameter_declaration_expected;
+                case 23 /* JSDocTypeArguments */: return ts.Diagnostics.Type_argument_expected;
+                case 25 /* JSDocTupleTypes */: return ts.Diagnostics.Type_expected;
+                case 24 /* JSDocRecordMembers */: return ts.Diagnostics.Property_assignment_expected;
+            }
+        }
+        ;
+        // Parses a comma-delimited list of elements
+        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = [];
+            result.pos = getNodePos();
+            var commaStart = -1; // Meaning the previous token was not a comma
+            while (true) {
+                if (isListElement(kind, /*inErrorRecovery*/ false)) {
+                    result.push(parseListElement(kind, parseElement));
+                    commaStart = scanner.getTokenPos();
+                    if (parseOptional(24 /* CommaToken */)) {
+                        continue;
+                    }
+                    commaStart = -1; // Back to the state where the last token was not a comma
+                    if (isListTerminator(kind)) {
+                        break;
+                    }
+                    // We didn't get a comma, and the list wasn't terminated, explicitly parse
+                    // out a comma so we give a good error message.
+                    parseExpected(24 /* CommaToken */);
+                    // If the token was a semicolon, and the caller allows that, then skip it and
+                    // continue.  This ensures we get back on track and don't result in tons of
+                    // parse errors.  For example, this can happen when people do things like use
+                    // a semicolon to delimit object literal members.   Note: we'll have already
+                    // reported an error when we called parseExpected above.
+                    if (considerSemicolonAsDelimiter && token === 23 /* SemicolonToken */ && !scanner.hasPrecedingLineBreak()) {
+                        nextToken();
+                    }
+                    continue;
+                }
+                if (isListTerminator(kind)) {
+                    break;
+                }
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
+                }
+            }
+            // Recording the trailing comma is deliberately done after the previous
+            // loop, and not just if we see a list terminator. This is because the list
+            // may have ended incorrectly, but it is still important to know if there
+            // was a trailing comma.
+            // Check if the last token was a comma.
+            if (commaStart >= 0) {
+                // Always preserve a trailing comma by marking it on the NodeArray
+                result.hasTrailingComma = true;
+            }
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function createMissingList() {
+            var pos = getNodePos();
+            var result = [];
+            result.pos = pos;
+            result.end = pos;
+            return result;
+        }
+        function parseBracketedList(kind, parseElement, open, close) {
+            if (parseExpected(open)) {
+                var result = parseDelimitedList(kind, parseElement);
+                parseExpected(close);
+                return result;
+            }
+            return createMissingList();
+        }
+        // The allowReservedWords parameter controls whether reserved words are permitted after the first dot
+        function parseEntityName(allowReservedWords, diagnosticMessage) {
+            var entity = parseIdentifier(diagnosticMessage);
+            while (parseOptional(21 /* DotToken */)) {
+                var node = createNode(139 /* QualifiedName */, entity.pos); // !!!
+                node.left = entity;
+                node.right = parseRightSideOfDot(allowReservedWords);
+                entity = finishNode(node);
+            }
+            return entity;
+        }
+        function parseRightSideOfDot(allowIdentifierNames) {
+            // Technically a keyword is valid here as all identifiers and keywords are identifier names.
+            // However, often we'll encounter this in error situations when the identifier or keyword
+            // is actually starting another valid construct.
+            //
+            // So, we check for the following specific case:
+            //
+            //      name.
+            //      identifierOrKeyword identifierNameOrKeyword
+            //
+            // Note: the newlines are important here.  For example, if that above code
+            // were rewritten into:
+            //
+            //      name.identifierOrKeyword
+            //      identifierNameOrKeyword
+            //
+            // Then we would consider it valid.  That's because ASI would take effect and
+            // the code would be implicitly: "name.identifierOrKeyword; identifierNameOrKeyword".
+            // In the first case though, ASI will not take effect because there is not a
+            // line terminator after the identifier or keyword.
+            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token)) {
+                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                if (matchesPattern) {
+                    // Report that we need an identifier.  However, report it right after the dot,
+                    // and not on the next token.  This is because the next token might actually
+                    // be an identifier and the error would be quite confusing.
+                    return createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Identifier_expected);
+                }
+            }
+            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
+        }
+        function parseTemplateExpression() {
+            var template = createNode(189 /* TemplateExpression */);
+            template.head = parseTemplateLiteralFragment();
+            ts.Debug.assert(template.head.kind === 12 /* TemplateHead */, "Template head has wrong token kind");
+            var templateSpans = [];
+            templateSpans.pos = getNodePos();
+            do {
+                templateSpans.push(parseTemplateSpan());
+            } while (ts.lastOrUndefined(templateSpans).literal.kind === 13 /* TemplateMiddle */);
+            templateSpans.end = getNodeEnd();
+            template.templateSpans = templateSpans;
+            return finishNode(template);
+        }
+        function parseTemplateSpan() {
+            var span = createNode(197 /* TemplateSpan */);
+            span.expression = allowInAnd(parseExpression);
+            var literal;
+            if (token === 16 /* CloseBraceToken */) {
+                reScanTemplateToken();
+                literal = parseTemplateLiteralFragment();
+            }
+            else {
+                literal = parseExpectedToken(14 /* TemplateTail */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(16 /* CloseBraceToken */));
+            }
+            span.literal = literal;
+            return finishNode(span);
+        }
+        function parseStringLiteralTypeNode() {
+            return parseLiteralLikeNode(166 /* StringLiteralType */, /*internName*/ true);
+        }
+        function parseLiteralNode(internName) {
+            return parseLiteralLikeNode(token, internName);
+        }
+        function parseTemplateLiteralFragment() {
+            return parseLiteralLikeNode(token, /*internName*/ false);
+        }
+        function parseLiteralLikeNode(kind, internName) {
+            var node = createNode(kind);
+            var text = scanner.getTokenValue();
+            node.text = internName ? internIdentifier(text) : text;
+            if (scanner.hasExtendedUnicodeEscape()) {
+                node.hasExtendedUnicodeEscape = true;
+            }
+            if (scanner.isUnterminated()) {
+                node.isUnterminated = true;
+            }
+            var tokenPos = scanner.getTokenPos();
+            nextToken();
+            finishNode(node);
+            // Octal literals are not allowed in strict mode or ES5
+            // Note that theoretically the following condition would hold true literals like 009,
+            // which is not octal.But because of how the scanner separates the tokens, we would
+            // never get a token like this. Instead, we would get 00 and 9 as two separate tokens.
+            // We also do not need to check for negatives because any prefix operator would be part of a
+            // parent unary expression.
+            if (node.kind === 8 /* NumericLiteral */
+                && sourceText.charCodeAt(tokenPos) === 48 /* _0 */
+                && ts.isOctalDigit(sourceText.charCodeAt(tokenPos + 1))) {
+                node.isOctalLiteral = true;
+            }
+            return node;
+        }
+        // TYPES
+        function parseTypeReference() {
+            var typeName = parseEntityName(/*allowReservedWords*/ false, ts.Diagnostics.Type_expected);
+            var node = createNode(155 /* TypeReference */, typeName.pos);
+            node.typeName = typeName;
+            if (!scanner.hasPrecedingLineBreak() && token === 25 /* LessThanToken */) {
+                node.typeArguments = parseBracketedList(18 /* TypeArguments */, parseType, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
+            }
+            return finishNode(node);
+        }
+        function parseThisTypePredicate(lhs) {
+            nextToken();
+            var node = createNode(154 /* TypePredicate */, lhs.pos);
+            node.parameterName = lhs;
+            node.type = parseType();
+            return finishNode(node);
+        }
+        function parseThisTypeNode() {
+            var node = createNode(165 /* ThisType */);
+            nextToken();
+            return finishNode(node);
+        }
+        function parseTypeQuery() {
+            var node = createNode(158 /* TypeQuery */);
+            parseExpected(101 /* TypeOfKeyword */);
+            node.exprName = parseEntityName(/*allowReservedWords*/ true);
+            return finishNode(node);
+        }
+        function parseTypeParameter() {
+            var node = createNode(141 /* TypeParameter */);
+            node.name = parseIdentifier();
+            if (parseOptional(83 /* ExtendsKeyword */)) {
+                // It's not uncommon for people to write improper constraints to a generic.  If the
+                // user writes a constraint that is an expression and not an actual type, then parse
+                // it out as an expression (so we can recover well), but report that a type is needed
+                // instead.
+                if (isStartOfType() || !isStartOfExpression()) {
+                    node.constraint = parseType();
+                }
+                else {
+                    // It was not a type, and it looked like an expression.  Parse out an expression
+                    // here so we recover well.  Note: it is important that we call parseUnaryExpression
+                    // and not parseExpression here.  If the user has:
+                    //
+                    //      <T extends "">
+                    //
+                    // We do *not* want to consume the  >  as we're consuming the expression for "".
+                    node.expression = parseUnaryExpressionOrHigher();
+                }
+            }
+            return finishNode(node);
+        }
+        function parseTypeParameters() {
+            if (token === 25 /* LessThanToken */) {
+                return parseBracketedList(17 /* TypeParameters */, parseTypeParameter, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
+            }
+        }
+        function parseParameterType() {
+            if (parseOptional(54 /* ColonToken */)) {
+                return parseType();
+            }
+            return undefined;
+        }
+        function isStartOfParameter() {
+            return token === 22 /* DotDotDotToken */ || isIdentifierOrPattern() || ts.isModifierKind(token) || token === 55 /* AtToken */ || token === 97 /* ThisKeyword */;
+        }
+        function setModifiers(node, modifiers) {
+            if (modifiers) {
+                node.flags |= modifiers.flags;
+                node.modifiers = modifiers;
+            }
+        }
+        function parseParameter() {
+            var node = createNode(142 /* Parameter */);
+            if (token === 97 /* ThisKeyword */) {
+                node.name = createIdentifier(/*isIdentifier*/ true, undefined);
+                node.type = parseParameterType();
+                return finishNode(node);
+            }
+            node.decorators = parseDecorators();
+            setModifiers(node, parseModifiers());
+            node.dotDotDotToken = parseOptionalToken(22 /* DotDotDotToken */);
+            // FormalParameter [Yield,Await]:
+            //      BindingElement[?Yield,?Await]
+            node.name = parseIdentifierOrPattern();
+            if (ts.getFullWidth(node.name) === 0 && node.flags === 0 && ts.isModifierKind(token)) {
+                // in cases like
+                // 'use strict'
+                // function foo(static)
+                // isParameter('static') === true, because of isModifier('static')
+                // however 'static' is not a legal identifier in a strict mode.
+                // so result of this function will be ParameterDeclaration (flags = 0, name = missing, type = undefined, initializer = undefined)
+                // and current token will not change => parsing of the enclosing parameter list will last till the end of time (or OOM)
+                // to avoid this we'll advance cursor to the next token.
+                nextToken();
+            }
+            node.questionToken = parseOptionalToken(53 /* QuestionToken */);
+            node.type = parseParameterType();
+            node.initializer = parseBindingElementInitializer(/*inParameter*/ true);
+            // Do not check for initializers in an ambient context for parameters. This is not
+            // a grammar error because the grammar allows arbitrary call signatures in
+            // an ambient context.
+            // It is actually not necessary for this to be an error at all. The reason is that
+            // function/constructor implementations are syntactically disallowed in ambient
+            // contexts. In addition, parameter initializers are semantically disallowed in
+            // overload signatures. So parameter initializers are transitively disallowed in
+            // ambient contexts.
+            return addJSDocComment(finishNode(node));
+        }
+        function parseBindingElementInitializer(inParameter) {
+            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
+        }
+        function parseParameterInitializer() {
+            return parseInitializer(/*inParameter*/ true);
+        }
+        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
+            var returnTokenRequired = returnToken === 34 /* EqualsGreaterThanToken */;
+            signature.typeParameters = parseTypeParameters();
+            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
+            if (returnTokenRequired) {
+                parseExpected(returnToken);
+                signature.type = parseTypeOrTypePredicate();
+            }
+            else if (parseOptional(returnToken)) {
+                signature.type = parseTypeOrTypePredicate();
+            }
+        }
+        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
+            // FormalParameters [Yield,Await]: (modified)
+            //      [empty]
+            //      FormalParameterList[?Yield,Await]
+            //
+            // FormalParameter[Yield,Await]: (modified)
+            //      BindingElement[?Yield,Await]
+            //
+            // BindingElement [Yield,Await]: (modified)
+            //      SingleNameBinding[?Yield,?Await]
+            //      BindingPattern[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
+            //
+            // SingleNameBinding [Yield,Await]:
+            //      BindingIdentifier[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
+            if (parseExpected(17 /* OpenParenToken */)) {
+                var savedYieldContext = inYieldContext();
+                var savedAwaitContext = inAwaitContext();
+                setYieldContext(yieldContext);
+                setAwaitContext(awaitContext);
+                var result = parseDelimitedList(16 /* Parameters */, parseParameter);
+                setYieldContext(savedYieldContext);
+                setAwaitContext(savedAwaitContext);
+                if (!parseExpected(18 /* CloseParenToken */) && requireCompleteParameterList) {
+                    // Caller insisted that we had to end with a )   We didn't.  So just return
+                    // undefined here.
+                    return undefined;
+                }
+                return result;
+            }
+            // We didn't even have an open paren.  If the caller requires a complete parameter list,
+            // we definitely can't provide that.  However, if they're ok with an incomplete one,
+            // then just return an empty set of parameters.
+            return requireCompleteParameterList ? undefined : createMissingList();
+        }
+        function parseTypeMemberSemicolon() {
+            // We allow type members to be separated by commas or (possibly ASI) semicolons.
+            // First check if it was a comma.  If so, we're done with the member.
+            if (parseOptional(24 /* CommaToken */)) {
+                return;
+            }
+            // Didn't have a comma.  We must have a (possible ASI) semicolon.
+            parseSemicolon();
+        }
+        function parseSignatureMember(kind) {
+            var node = createNode(kind);
+            if (kind === 152 /* ConstructSignature */) {
+                parseExpected(92 /* NewKeyword */);
+            }
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            parseTypeMemberSemicolon();
+            return finishNode(node);
+        }
+        function isIndexSignature() {
+            if (token !== 19 /* OpenBracketToken */) {
+                return false;
+            }
+            return lookAhead(isUnambiguouslyIndexSignature);
+        }
+        function isUnambiguouslyIndexSignature() {
+            // The only allowed sequence is:
+            //
+            //   [id:
+            //
+            // However, for error recovery, we also check the following cases:
+            //
+            //   [...
+            //   [id,
+            //   [id?,
+            //   [id?:
+            //   [id?]
+            //   [public id
+            //   [private id
+            //   [protected id
+            //   []
+            //
+            nextToken();
+            if (token === 22 /* DotDotDotToken */ || token === 20 /* CloseBracketToken */) {
+                return true;
+            }
+            if (ts.isModifierKind(token)) {
+                nextToken();
+                if (isIdentifier()) {
+                    return true;
+                }
+            }
+            else if (!isIdentifier()) {
+                return false;
+            }
+            else {
+                // Skip the identifier
+                nextToken();
+            }
+            // A colon signifies a well formed indexer
+            // A comma should be a badly formed indexer because comma expressions are not allowed
+            // in computed properties.
+            if (token === 54 /* ColonToken */ || token === 24 /* CommaToken */) {
+                return true;
+            }
+            // Question mark could be an indexer with an optional property,
+            // or it could be a conditional expression in a computed property.
+            if (token !== 53 /* QuestionToken */) {
+                return false;
+            }
+            // If any of the following tokens are after the question mark, it cannot
+            // be a conditional expression, so treat it as an indexer.
+            nextToken();
+            return token === 54 /* ColonToken */ || token === 24 /* CommaToken */ || token === 20 /* CloseBracketToken */;
+        }
+        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(153 /* IndexSignature */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.parameters = parseBracketedList(16 /* Parameters */, parseParameter, 19 /* OpenBracketToken */, 20 /* CloseBracketToken */);
+            node.type = parseTypeAnnotation();
+            parseTypeMemberSemicolon();
+            return finishNode(node);
+        }
+        function parsePropertyOrMethodSignature(fullStart, modifiers) {
+            var name = parsePropertyName();
+            var questionToken = parseOptionalToken(53 /* QuestionToken */);
+            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
+                var method = createNode(146 /* MethodSignature */, fullStart);
+                setModifiers(method, modifiers);
+                method.name = name;
+                method.questionToken = questionToken;
+                // Method signatures don't exist in expression contexts.  So they have neither
+                // [Yield] nor [Await]
+                fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, method);
+                parseTypeMemberSemicolon();
+                return finishNode(method);
+            }
+            else {
+                var property = createNode(144 /* PropertySignature */, fullStart);
+                setModifiers(property, modifiers);
+                property.name = name;
+                property.questionToken = questionToken;
+                property.type = parseTypeAnnotation();
+                if (token === 56 /* EqualsToken */) {
+                    // Although type literal properties cannot not have initializers, we attempt
+                    // to parse an initializer so we can report in the checker that an interface
+                    // property or type literal property cannot have an initializer.
+                    property.initializer = parseNonParameterInitializer();
+                }
+                parseTypeMemberSemicolon();
+                return finishNode(property);
+            }
+        }
+        function isTypeMemberStart() {
+            var idToken;
+            // Return true if we have the start of a signature member
+            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
+                return true;
+            }
+            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier
+            while (ts.isModifierKind(token)) {
+                idToken = token;
+                nextToken();
+            }
+            // Index signatures and computed property names are type members
+            if (token === 19 /* OpenBracketToken */) {
+                return true;
+            }
+            // Try to get the first property-like token following all modifiers
+            if (isLiteralPropertyName()) {
+                idToken = token;
+                nextToken();
+            }
+            // If we were able to get any potential identifier, check that it is
+            // the start of a member declaration
+            if (idToken) {
+                return token === 17 /* OpenParenToken */ ||
+                    token === 25 /* LessThanToken */ ||
+                    token === 53 /* QuestionToken */ ||
+                    token === 54 /* ColonToken */ ||
+                    canParseSemicolon();
+            }
+            return false;
+        }
+        function parseTypeMember() {
+            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
+                return parseSignatureMember(151 /* CallSignature */);
+            }
+            if (token === 92 /* NewKeyword */ && lookAhead(isStartOfConstructSignature)) {
+                return parseSignatureMember(152 /* ConstructSignature */);
+            }
+            var fullStart = getNodePos();
+            var modifiers = parseModifiers();
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, /*decorators*/ undefined, modifiers);
+            }
+            return parsePropertyOrMethodSignature(fullStart, modifiers);
+        }
+        function isStartOfConstructSignature() {
+            nextToken();
+            return token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */;
+        }
+        function parseTypeLiteral() {
+            var node = createNode(159 /* TypeLiteral */);
+            node.members = parseObjectTypeMembers();
+            return finishNode(node);
+        }
+        function parseObjectTypeMembers() {
+            var members;
+            if (parseExpected(15 /* OpenBraceToken */)) {
+                members = parseList(4 /* TypeMembers */, parseTypeMember);
+                parseExpected(16 /* CloseBraceToken */);
+            }
+            else {
+                members = createMissingList();
+            }
+            return members;
+        }
+        function parseTupleType() {
+            var node = createNode(161 /* TupleType */);
+            node.elementTypes = parseBracketedList(19 /* TupleElementTypes */, parseType, 19 /* OpenBracketToken */, 20 /* CloseBracketToken */);
+            return finishNode(node);
+        }
+        function parseParenthesizedType() {
+            var node = createNode(164 /* ParenthesizedType */);
+            parseExpected(17 /* OpenParenToken */);
+            node.type = parseType();
+            parseExpected(18 /* CloseParenToken */);
+            return finishNode(node);
+        }
+        function parseFunctionOrConstructorType(kind) {
+            var node = createNode(kind);
+            if (kind === 157 /* ConstructorType */) {
+                parseExpected(92 /* NewKeyword */);
+            }
+            fillSignature(34 /* EqualsGreaterThanToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            return finishNode(node);
+        }
+        function parseKeywordAndNoDot() {
+            var node = parseTokenNode();
+            return token === 21 /* DotToken */ ? undefined : node;
+        }
+        function parseNonArrayType() {
+            switch (token) {
+                case 117 /* AnyKeyword */:
+                case 132 /* StringKeyword */:
+                case 130 /* NumberKeyword */:
+                case 120 /* BooleanKeyword */:
+                case 133 /* SymbolKeyword */:
+                case 135 /* UndefinedKeyword */:
+                case 127 /* NeverKeyword */:
+                    // If these are followed by a dot, then parse these out as a dotted type reference instead.
+                    var node = tryParse(parseKeywordAndNoDot);
+                    return node || parseTypeReference();
+                case 9 /* StringLiteral */:
+                    return parseStringLiteralTypeNode();
+                case 103 /* VoidKeyword */:
+                case 93 /* NullKeyword */:
+                    return parseTokenNode();
+                case 97 /* ThisKeyword */: {
+                    var thisKeyword = parseThisTypeNode();
+                    if (token === 124 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
+                        return parseThisTypePredicate(thisKeyword);
+                    }
+                    else {
+                        return thisKeyword;
+                    }
+                }
+                case 101 /* TypeOfKeyword */:
+                    return parseTypeQuery();
+                case 15 /* OpenBraceToken */:
+                    return parseTypeLiteral();
+                case 19 /* OpenBracketToken */:
+                    return parseTupleType();
+                case 17 /* OpenParenToken */:
+                    return parseParenthesizedType();
+                default:
+                    return parseTypeReference();
+            }
+        }
+        function isStartOfType() {
+            switch (token) {
+                case 117 /* AnyKeyword */:
+                case 132 /* StringKeyword */:
+                case 130 /* NumberKeyword */:
+                case 120 /* BooleanKeyword */:
+                case 133 /* SymbolKeyword */:
+                case 103 /* VoidKeyword */:
+                case 135 /* UndefinedKeyword */:
+                case 93 /* NullKeyword */:
+                case 97 /* ThisKeyword */:
+                case 101 /* TypeOfKeyword */:
+                case 127 /* NeverKeyword */:
+                case 15 /* OpenBraceToken */:
+                case 19 /* OpenBracketToken */:
+                case 25 /* LessThanToken */:
+                case 92 /* NewKeyword */:
+                case 9 /* StringLiteral */:
+                    return true;
+                case 17 /* OpenParenToken */:
+                    // Only consider '(' the start of a type if followed by ')', '...', an identifier, a modifier,
+                    // or something that starts a type. We don't want to consider things like '(1)' a type.
+                    return lookAhead(isStartOfParenthesizedOrFunctionType);
+                default:
+                    return isIdentifier();
+            }
+        }
+        function isStartOfParenthesizedOrFunctionType() {
+            nextToken();
+            return token === 18 /* CloseParenToken */ || isStartOfParameter() || isStartOfType();
+        }
+        function parseArrayTypeOrHigher() {
+            var type = parseNonArrayType();
+            while (!scanner.hasPrecedingLineBreak() && parseOptional(19 /* OpenBracketToken */)) {
+                parseExpected(20 /* CloseBracketToken */);
+                var node = createNode(160 /* ArrayType */, type.pos);
+                node.elementType = type;
+                type = finishNode(node);
+            }
+            return type;
+        }
+        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
+            var type = parseConstituentType();
+            if (token === operator) {
+                var types = [type];
+                types.pos = type.pos;
+                while (parseOptional(operator)) {
+                    types.push(parseConstituentType());
+                }
+                types.end = getNodeEnd();
+                var node = createNode(kind, type.pos);
+                node.types = types;
+                type = finishNode(node);
+            }
+            return type;
+        }
+        function parseIntersectionTypeOrHigher() {
+            return parseUnionOrIntersectionType(163 /* IntersectionType */, parseArrayTypeOrHigher, 46 /* AmpersandToken */);
+        }
+        function parseUnionTypeOrHigher() {
+            return parseUnionOrIntersectionType(162 /* UnionType */, parseIntersectionTypeOrHigher, 47 /* BarToken */);
+        }
+        function isStartOfFunctionType() {
+            if (token === 25 /* LessThanToken */) {
+                return true;
+            }
+            return token === 17 /* OpenParenToken */ && lookAhead(isUnambiguouslyStartOfFunctionType);
+        }
+        function skipParameterStart() {
+            if (ts.isModifierKind(token)) {
+                // Skip modifiers
+                parseModifiers();
+            }
+            if (isIdentifier() || token === 97 /* ThisKeyword */) {
+                nextToken();
+                return true;
+            }
+            if (token === 19 /* OpenBracketToken */ || token === 15 /* OpenBraceToken */) {
+                // Return true if we can parse an array or object binding pattern with no errors
+                var previousErrorCount = parseDiagnostics.length;
+                parseIdentifierOrPattern();
+                return previousErrorCount === parseDiagnostics.length;
+            }
+            return false;
+        }
+        function isUnambiguouslyStartOfFunctionType() {
+            nextToken();
+            if (token === 18 /* CloseParenToken */ || token === 22 /* DotDotDotToken */) {
+                // ( )
+                // ( ...
+                return true;
+            }
+            if (skipParameterStart()) {
+                // We successfully skipped modifiers (if any) and an identifier or binding pattern,
+                // now see if we have something that indicates a parameter declaration
+                if (token === 54 /* ColonToken */ || token === 24 /* CommaToken */ ||
+                    token === 53 /* QuestionToken */ || token === 56 /* EqualsToken */) {
+                    // ( xxx :
+                    // ( xxx ,
+                    // ( xxx ?
+                    // ( xxx =
+                    return true;
+                }
+                if (token === 18 /* CloseParenToken */) {
+                    nextToken();
+                    if (token === 34 /* EqualsGreaterThanToken */) {
+                        // ( xxx ) =>
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function parseTypeOrTypePredicate() {
+            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
+            var type = parseType();
+            if (typePredicateVariable) {
+                var node = createNode(154 /* TypePredicate */, typePredicateVariable.pos);
+                node.parameterName = typePredicateVariable;
+                node.type = type;
+                return finishNode(node);
+            }
+            else {
+                return type;
+            }
+        }
+        function parseTypePredicatePrefix() {
+            var id = parseIdentifier();
+            if (token === 124 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
+                nextToken();
+                return id;
+            }
+        }
+        function parseType() {
+            // The rules about 'yield' only apply to actual code/expression contexts.  They don't
+            // apply to 'type' contexts.  So we disable these parameters here before moving on.
+            return doOutsideOfContext(41943040 /* TypeExcludesFlags */, parseTypeWorker);
+        }
+        function parseTypeWorker() {
+            if (isStartOfFunctionType()) {
+                return parseFunctionOrConstructorType(156 /* FunctionType */);
+            }
+            if (token === 92 /* NewKeyword */) {
+                return parseFunctionOrConstructorType(157 /* ConstructorType */);
+            }
+            return parseUnionTypeOrHigher();
+        }
+        function parseTypeAnnotation() {
+            return parseOptional(54 /* ColonToken */) ? parseType() : undefined;
+        }
+        // EXPRESSIONS
+        function isStartOfLeftHandSideExpression() {
+            switch (token) {
+                case 97 /* ThisKeyword */:
+                case 95 /* SuperKeyword */:
+                case 93 /* NullKeyword */:
+                case 99 /* TrueKeyword */:
+                case 84 /* FalseKeyword */:
+                case 8 /* NumericLiteral */:
+                case 9 /* StringLiteral */:
+                case 11 /* NoSubstitutionTemplateLiteral */:
+                case 12 /* TemplateHead */:
+                case 17 /* OpenParenToken */:
+                case 19 /* OpenBracketToken */:
+                case 15 /* OpenBraceToken */:
+                case 87 /* FunctionKeyword */:
+                case 73 /* ClassKeyword */:
+                case 92 /* NewKeyword */:
+                case 39 /* SlashToken */:
+                case 61 /* SlashEqualsToken */:
+                case 69 /* Identifier */:
+                    return true;
+                default:
+                    return isIdentifier();
+            }
+        }
+        function isStartOfExpression() {
+            if (isStartOfLeftHandSideExpression()) {
+                return true;
+            }
+            switch (token) {
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                case 50 /* TildeToken */:
+                case 49 /* ExclamationToken */:
+                case 78 /* DeleteKeyword */:
+                case 101 /* TypeOfKeyword */:
+                case 103 /* VoidKeyword */:
+                case 41 /* PlusPlusToken */:
+                case 42 /* MinusMinusToken */:
+                case 25 /* LessThanToken */:
+                case 119 /* AwaitKeyword */:
+                case 114 /* YieldKeyword */:
+                    // Yield/await always starts an expression.  Either it is an identifier (in which case
+                    // it is definitely an expression).  Or it's a keyword (either because we're in
+                    // a generator or async function, or in strict mode (or both)) and it started a yield or await expression.
+                    return true;
+                default:
+                    // Error tolerance.  If we see the start of some binary operator, we consider
+                    // that the start of an expression.  That way we'll parse out a missing identifier,
+                    // give a good message about an identifier being missing, and then consume the
+                    // rest of the binary expression.
+                    if (isBinaryOperator()) {
+                        return true;
+                    }
+                    return isIdentifier();
+            }
+        }
+        function isStartOfExpressionStatement() {
+            // As per the grammar, none of '{' or 'function' or 'class' can start an expression statement.
+            return token !== 15 /* OpenBraceToken */ &&
+                token !== 87 /* FunctionKeyword */ &&
+                token !== 73 /* ClassKeyword */ &&
+                token !== 55 /* AtToken */ &&
+                isStartOfExpression();
+        }
+        function parseExpression() {
+            // Expression[in]:
+            //      AssignmentExpression[in]
+            //      Expression[in] , AssignmentExpression[in]
+            // clear the decorator context when parsing Expression, as it should be unambiguous when parsing a decorator
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ false);
+            }
+            var expr = parseAssignmentExpressionOrHigher();
+            var operatorToken;
+            while ((operatorToken = parseOptionalToken(24 /* CommaToken */))) {
+                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
+            }
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ true);
+            }
+            return expr;
+        }
+        function parseInitializer(inParameter) {
+            if (token !== 56 /* EqualsToken */) {
+                // It's not uncommon during typing for the user to miss writing the '=' token.  Check if
+                // there is no newline after the last token and if we're on an expression.  If so, parse
+                // this as an equals-value clause with a missing equals.
+                // NOTE: There are two places where we allow equals-value clauses.  The first is in a
+                // variable declarator.  The second is with a parameter.  For variable declarators
+                // it's more likely that a { would be a allowed (as an object literal).  While this
+                // is also allowed for parameters, the risk is that we consume the { as an object
+                // literal when it really will be for the block following the parameter.
+                if (scanner.hasPrecedingLineBreak() || (inParameter && token === 15 /* OpenBraceToken */) || !isStartOfExpression()) {
+                    // preceding line break, open brace in a parameter (likely a function body) or current token is not an expression -
+                    // do not try to parse initializer
+                    return undefined;
+                }
+            }
+            // Initializer[In, Yield] :
+            //     = AssignmentExpression[?In, ?Yield]
+            parseExpected(56 /* EqualsToken */);
+            return parseAssignmentExpressionOrHigher();
+        }
+        function parseAssignmentExpressionOrHigher() {
+            //  AssignmentExpression[in,yield]:
+            //      1) ConditionalExpression[?in,?yield]
+            //      2) LeftHandSideExpression = AssignmentExpression[?in,?yield]
+            //      3) LeftHandSideExpression AssignmentOperator AssignmentExpression[?in,?yield]
+            //      4) ArrowFunctionExpression[?in,?yield]
+            //      5) AsyncArrowFunctionExpression[in,yield,await]
+            //      6) [+Yield] YieldExpression[?In]
+            //
+            // Note: for ease of implementation we treat productions '2' and '3' as the same thing.
+            // (i.e. they're both BinaryExpressions with an assignment operator in it).
+            // First, do the simple check if we have a YieldExpression (production '5').
+            if (isYieldExpression()) {
+                return parseYieldExpression();
+            }
+            // Then, check if we have an arrow function (production '4' and '5') that starts with a parenthesized
+            // parameter list or is an async arrow function.
+            // AsyncArrowFunctionExpression:
+            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
+            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
+            // Production (1) of AsyncArrowFunctionExpression is parsed in "tryParseAsyncSimpleArrowFunctionExpression".
+            // And production (2) is parsed in "tryParseParenthesizedArrowFunctionExpression".
+            //
+            // If we do successfully parse arrow-function, we must *not* recurse for productions 1, 2 or 3. An ArrowFunction is
+            // not a  LeftHandSideExpression, nor does it start a ConditionalExpression.  So we are done
+            // with AssignmentExpression if we see one.
+            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
+            if (arrowExpression) {
+                return arrowExpression;
+            }
+            // Now try to see if we're in production '1', '2' or '3'.  A conditional expression can
+            // start with a LogicalOrExpression, while the assignment productions can only start with
+            // LeftHandSideExpressions.
+            //
+            // So, first, we try to just parse out a BinaryExpression.  If we get something that is a
+            // LeftHandSide or higher, then we can try to parse out the assignment expression part.
+            // Otherwise, we try to parse out the conditional expression bit.  We want to allow any
+            // binary expression here, so we pass in the 'lowest' precedence here so that it matches
+            // and consumes anything.
+            var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
+            // To avoid a look-ahead, we did not handle the case of an arrow function with a single un-parenthesized
+            // parameter ('x => ...') above. We handle it here by checking if the parsed expression was a single
+            // identifier and the current token is an arrow.
+            if (expr.kind === 69 /* Identifier */ && token === 34 /* EqualsGreaterThanToken */) {
+                return parseSimpleArrowFunctionExpression(expr);
+            }
+            // Now see if we might be in cases '2' or '3'.
+            // If the expression was a LHS expression, and we have an assignment operator, then
+            // we're in '2' or '3'. Consume the assignment and return.
+            //
+            // Note: we call reScanGreaterToken so that we get an appropriately merged token
+            // for cases like > > =  becoming >>=
+            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
+                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
+            }
+            // It wasn't an assignment or a lambda.  This is a conditional expression:
+            return parseConditionalExpressionRest(expr);
+        }
+        function isYieldExpression() {
+            if (token === 114 /* YieldKeyword */) {
+                // If we have a 'yield' keyword, and this is a context where yield expressions are
+                // allowed, then definitely parse out a yield expression.
+                if (inYieldContext()) {
+                    return true;
+                }
+                // We're in a context where 'yield expr' is not allowed.  However, if we can
+                // definitely tell that the user was trying to parse a 'yield expr' and not
+                // just a normal expr that start with a 'yield' identifier, then parse out
+                // a 'yield expr'.  We can then report an error later that they are only
+                // allowed in generator expressions.
+                //
+                // for example, if we see 'yield(foo)', then we'll have to treat that as an
+                // invocation expression of something called 'yield'.  However, if we have
+                // 'yield foo' then that is not legal as a normal expression, so we can
+                // definitely recognize this as a yield expression.
+                //
+                // for now we just check if the next token is an identifier.  More heuristics
+                // can be added here later as necessary.  We just need to make sure that we
+                // don't accidentally consume something legal.
+                return lookAhead(nextTokenIsIdentifierOrKeywordOrNumberOnSameLine);
+            }
+            return false;
+        }
+        function nextTokenIsIdentifierOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && isIdentifier();
+        }
+        function parseYieldExpression() {
+            var node = createNode(190 /* YieldExpression */);
+            // YieldExpression[In] :
+            //      yield
+            //      yield [no LineTerminator here] [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
+            //      yield [no LineTerminator here] * [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
+            nextToken();
+            if (!scanner.hasPrecedingLineBreak() &&
+                (token === 37 /* AsteriskToken */ || isStartOfExpression())) {
+                node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
+                node.expression = parseAssignmentExpressionOrHigher();
+                return finishNode(node);
+            }
+            else {
+                // if the next token is not on the same line as yield.  or we don't have an '*' or
+                // the start of an expression, then this is just a simple "yield" expression.
+                return finishNode(node);
+            }
+        }
+        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
+            ts.Debug.assert(token === 34 /* EqualsGreaterThanToken */, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
+            var node;
+            if (asyncModifier) {
+                node = createNode(180 /* ArrowFunction */, asyncModifier.pos);
+                setModifiers(node, asyncModifier);
+            }
+            else {
+                node = createNode(180 /* ArrowFunction */, identifier.pos);
+            }
+            var parameter = createNode(142 /* Parameter */, identifier.pos);
+            parameter.name = identifier;
+            finishNode(parameter);
+            node.parameters = [parameter];
+            node.parameters.pos = parameter.pos;
+            node.parameters.end = parameter.end;
+            node.equalsGreaterThanToken = parseExpectedToken(34 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
+            node.body = parseArrowFunctionExpressionBody(/*isAsync*/ !!asyncModifier);
+            return finishNode(node);
+        }
+        function tryParseParenthesizedArrowFunctionExpression() {
+            var triState = isParenthesizedArrowFunctionExpression();
+            if (triState === 0 /* False */) {
+                // It's definitely not a parenthesized arrow function expression.
+                return undefined;
+            }
+            // If we definitely have an arrow function, then we can just parse one, not requiring a
+            // following => or { token. Otherwise, we *might* have an arrow function.  Try to parse
+            // it out, but don't allow any ambiguity, and return 'undefined' if this could be an
+            // expression instead.
+            var arrowFunction = triState === 1 /* True */
+                ? parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ true)
+                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
+            if (!arrowFunction) {
+                // Didn't appear to actually be a parenthesized arrow function.  Just bail out.
+                return undefined;
+            }
+            var isAsync = !!(arrowFunction.flags & 256 /* Async */);
+            // If we have an arrow, then try to parse the body. Even if not, try to parse if we
+            // have an opening brace, just in case we're in an error state.
+            var lastToken = token;
+            arrowFunction.equalsGreaterThanToken = parseExpectedToken(34 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
+            arrowFunction.body = (lastToken === 34 /* EqualsGreaterThanToken */ || lastToken === 15 /* OpenBraceToken */)
+                ? parseArrowFunctionExpressionBody(isAsync)
+                : parseIdentifier();
+            return finishNode(arrowFunction);
+        }
+        //  True        -> We definitely expect a parenthesized arrow function here.
+        //  False       -> There *cannot* be a parenthesized arrow function here.
+        //  Unknown     -> There *might* be a parenthesized arrow function here.
+        //                 Speculatively look ahead to be sure, and rollback if not.
+        function isParenthesizedArrowFunctionExpression() {
+            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */ || token === 118 /* AsyncKeyword */) {
+                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
+            }
+            if (token === 34 /* EqualsGreaterThanToken */) {
+                // ERROR RECOVERY TWEAK:
+                // If we see a standalone => try to parse it as an arrow function expression as that's
+                // likely what the user intended to write.
+                return 1 /* True */;
+            }
+            // Definitely not a parenthesized arrow function.
+            return 0 /* False */;
+        }
+        function isParenthesizedArrowFunctionExpressionWorker() {
+            if (token === 118 /* AsyncKeyword */) {
+                nextToken();
+                if (scanner.hasPrecedingLineBreak()) {
+                    return 0 /* False */;
+                }
+                if (token !== 17 /* OpenParenToken */ && token !== 25 /* LessThanToken */) {
+                    return 0 /* False */;
+                }
+            }
+            var first = token;
+            var second = nextToken();
+            if (first === 17 /* OpenParenToken */) {
+                if (second === 18 /* CloseParenToken */) {
+                    // Simple cases: "() =>", "(): ", and  "() {".
+                    // This is an arrow function with no parameters.
+                    // The last one is not actually an arrow function,
+                    // but this is probably what the user intended.
+                    var third = nextToken();
+                    switch (third) {
+                        case 34 /* EqualsGreaterThanToken */:
+                        case 54 /* ColonToken */:
+                        case 15 /* OpenBraceToken */:
+                            return 1 /* True */;
+                        default:
+                            return 0 /* False */;
+                    }
+                }
+                // If encounter "([" or "({", this could be the start of a binding pattern.
+                // Examples:
+                //      ([ x ]) => { }
+                //      ({ x }) => { }
+                //      ([ x ])
+                //      ({ x })
+                if (second === 19 /* OpenBracketToken */ || second === 15 /* OpenBraceToken */) {
+                    return 2 /* Unknown */;
+                }
+                // Simple case: "(..."
+                // This is an arrow function with a rest parameter.
+                if (second === 22 /* DotDotDotToken */) {
+                    return 1 /* True */;
+                }
+                // If we had "(" followed by something that's not an identifier,
+                // then this definitely doesn't look like a lambda.
+                // Note: we could be a little more lenient and allow
+                // "(public" or "(private". These would not ever actually be allowed,
+                // but we could provide a good error message instead of bailing out.
+                if (!isIdentifier()) {
+                    return 0 /* False */;
+                }
+                // If we have something like "(a:", then we must have a
+                // type-annotated parameter in an arrow function expression.
+                if (nextToken() === 54 /* ColonToken */) {
+                    return 1 /* True */;
+                }
+                // This *could* be a parenthesized arrow function.
+                // Return Unknown to let the caller know.
+                return 2 /* Unknown */;
+            }
+            else {
+                ts.Debug.assert(first === 25 /* LessThanToken */);
+                // If we have "<" not followed by an identifier,
+                // then this definitely is not an arrow function.
+                if (!isIdentifier()) {
+                    return 0 /* False */;
+                }
+                // JSX overrides
+                if (sourceFile.languageVariant === 1 /* JSX */) {
+                    var isArrowFunctionInJsx = lookAhead(function () {
+                        var third = nextToken();
+                        if (third === 83 /* ExtendsKeyword */) {
+                            var fourth = nextToken();
+                            switch (fourth) {
+                                case 56 /* EqualsToken */:
+                                case 27 /* GreaterThanToken */:
+                                    return false;
+                                default:
+                                    return true;
+                            }
+                        }
+                        else if (third === 24 /* CommaToken */) {
+                            return true;
+                        }
+                        return false;
+                    });
+                    if (isArrowFunctionInJsx) {
+                        return 1 /* True */;
+                    }
+                    return 0 /* False */;
+                }
+                // This *could* be a parenthesized arrow function.
+                return 2 /* Unknown */;
+            }
+        }
+        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
+            return parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ false);
+        }
+        function tryParseAsyncSimpleArrowFunctionExpression() {
+            // We do a check here so that we won't be doing unnecessarily call to "lookAhead"
+            if (token === 118 /* AsyncKeyword */) {
+                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
+                if (isUnParenthesizedAsyncArrowFunction === 1 /* True */) {
+                    var asyncModifier = parseModifiersForArrowFunction();
+                    var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
+                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
+                }
+            }
+            return undefined;
+        }
+        function isUnParenthesizedAsyncArrowFunctionWorker() {
+            // AsyncArrowFunctionExpression:
+            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
+            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
+            if (token === 118 /* AsyncKeyword */) {
+                nextToken();
+                // If the "async" is followed by "=>" token then it is not a begining of an async arrow-function
+                // but instead a simple arrow-function which will be parsed inside "parseAssignmentExpressionOrHigher"
+                if (scanner.hasPrecedingLineBreak() || token === 34 /* EqualsGreaterThanToken */) {
+                    return 0 /* False */;
+                }
+                // Check for un-parenthesized AsyncArrowFunction
+                var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
+                if (!scanner.hasPrecedingLineBreak() && expr.kind === 69 /* Identifier */ && token === 34 /* EqualsGreaterThanToken */) {
+                    return 1 /* True */;
+                }
+            }
+            return 0 /* False */;
+        }
+        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
+            var node = createNode(180 /* ArrowFunction */);
+            setModifiers(node, parseModifiersForArrowFunction());
+            var isAsync = !!(node.flags & 256 /* Async */);
+            // Arrow functions are never generators.
+            //
+            // If we're speculatively parsing a signature for a parenthesized arrow function, then
+            // we have to have a complete parameter list.  Otherwise we might see something like
+            // a => (b => c)
+            // And think that "(b =>" was actually a parenthesized arrow function with a missing
+            // close paren.
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ !allowAmbiguity, node);
+            // If we couldn't get parameters, we definitely could not parse out an arrow function.
+            if (!node.parameters) {
+                return undefined;
+            }
+            // Parsing a signature isn't enough.
+            // Parenthesized arrow signatures often look like other valid expressions.
+            // For instance:
+            //  - "(x = 10)" is an assignment expression parsed as a signature with a default parameter value.
+            //  - "(x,y)" is a comma expression parsed as a signature with two parameters.
+            //  - "a ? (b): c" will have "(b):" parsed as a signature with a return type annotation.
+            //
+            // So we need just a bit of lookahead to ensure that it can only be a signature.
+            if (!allowAmbiguity && token !== 34 /* EqualsGreaterThanToken */ && token !== 15 /* OpenBraceToken */) {
+                // Returning undefined here will cause our caller to rewind to where we started from.
+                return undefined;
+            }
+            return node;
+        }
+        function parseArrowFunctionExpressionBody(isAsync) {
+            if (token === 15 /* OpenBraceToken */) {
+                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
+            }
+            if (token !== 23 /* SemicolonToken */ &&
+                token !== 87 /* FunctionKeyword */ &&
+                token !== 73 /* ClassKeyword */ &&
+                isStartOfStatement() &&
+                !isStartOfExpressionStatement()) {
+                // Check if we got a plain statement (i.e. no expression-statements, no function/class expressions/declarations)
+                //
+                // Here we try to recover from a potential error situation in the case where the
+                // user meant to supply a block. For example, if the user wrote:
+                //
+                //  a =>
+                //      let v = 0;
+                //  }
+                //
+                // they may be missing an open brace.  Check to see if that's the case so we can
+                // try to recover better.  If we don't do this, then the next close curly we see may end
+                // up preemptively closing the containing construct.
+                //
+                // Note: even when 'ignoreMissingOpenBrace' is passed as true, parseBody will still error.
+                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ true);
+            }
+            return isAsync
+                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
+                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
+        }
+        function parseConditionalExpressionRest(leftOperand) {
+            // Note: we are passed in an expression which was produced from parseBinaryExpressionOrHigher.
+            var questionToken = parseOptionalToken(53 /* QuestionToken */);
+            if (!questionToken) {
+                return leftOperand;
+            }
+            // Note: we explicitly 'allowIn' in the whenTrue part of the condition expression, and
+            // we do not that for the 'whenFalse' part.
+            var node = createNode(188 /* ConditionalExpression */, leftOperand.pos);
+            node.condition = leftOperand;
+            node.questionToken = questionToken;
+            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
+            node.colonToken = parseExpectedToken(54 /* ColonToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(54 /* ColonToken */));
+            node.whenFalse = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
+        }
+        function parseBinaryExpressionOrHigher(precedence) {
+            var leftOperand = parseUnaryExpressionOrHigher();
+            return parseBinaryExpressionRest(precedence, leftOperand);
+        }
+        function isInOrOfKeyword(t) {
+            return t === 90 /* InKeyword */ || t === 138 /* OfKeyword */;
+        }
+        function parseBinaryExpressionRest(precedence, leftOperand) {
+            while (true) {
+                // We either have a binary operator here, or we're finished.  We call
+                // reScanGreaterToken so that we merge token sequences like > and = into >=
+                reScanGreaterToken();
+                var newPrecedence = getBinaryOperatorPrecedence();
+                // Check the precedence to see if we should "take" this operator
+                // - For left associative operator (all operator but **), consume the operator,
+                //   recursively call the function below, and parse binaryExpression as a rightOperand
+                //   of the caller if the new precedence of the operator is greater then or equal to the current precedence.
+                //   For example:
+                //      a - b - c;
+                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
+                //      a * b - c
+                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
+                //      a - b * c;
+                //            ^token; leftOperand = b. Return b * c to the caller as a rightOperand
+                // - For right associative operator (**), consume the operator, recursively call the function
+                //   and parse binaryExpression as a rightOperand of the caller if the new precedence of
+                //   the operator is strictly grater than the current precedence
+                //   For example:
+                //      a ** b ** c;
+                //             ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
+                //      a - b ** c;
+                //            ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
+                //      a ** b - c
+                //             ^token; leftOperand = b. Return b to the caller as a rightOperand
+                var consumeCurrentOperator = token === 38 /* AsteriskAsteriskToken */ ?
+                    newPrecedence >= precedence :
+                    newPrecedence > precedence;
+                if (!consumeCurrentOperator) {
+                    break;
+                }
+                if (token === 90 /* InKeyword */ && inDisallowInContext()) {
+                    break;
+                }
+                if (token === 116 /* AsKeyword */) {
+                    // Make sure we *do* perform ASI for constructs like this:
+                    //    var x = foo
+                    //    as (Bar)
+                    // This should be parsed as an initialized variable, followed
+                    // by a function call to 'as' with the argument 'Bar'
+                    if (scanner.hasPrecedingLineBreak()) {
+                        break;
+                    }
+                    else {
+                        nextToken();
+                        leftOperand = makeAsExpression(leftOperand, parseType());
+                    }
+                }
+                else {
+                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
+                }
+            }
+            return leftOperand;
+        }
+        function isBinaryOperator() {
+            if (inDisallowInContext() && token === 90 /* InKeyword */) {
+                return false;
+            }
+            return getBinaryOperatorPrecedence() > 0;
+        }
+        function getBinaryOperatorPrecedence() {
+            switch (token) {
+                case 52 /* BarBarToken */:
+                    return 1;
+                case 51 /* AmpersandAmpersandToken */:
+                    return 2;
+                case 47 /* BarToken */:
+                    return 3;
+                case 48 /* CaretToken */:
+                    return 4;
+                case 46 /* AmpersandToken */:
+                    return 5;
+                case 30 /* EqualsEqualsToken */:
+                case 31 /* ExclamationEqualsToken */:
+                case 32 /* EqualsEqualsEqualsToken */:
+                case 33 /* ExclamationEqualsEqualsToken */:
+                    return 6;
+                case 25 /* LessThanToken */:
+                case 27 /* GreaterThanToken */:
+                case 28 /* LessThanEqualsToken */:
+                case 29 /* GreaterThanEqualsToken */:
+                case 91 /* InstanceOfKeyword */:
+                case 90 /* InKeyword */:
+                case 116 /* AsKeyword */:
+                    return 7;
+                case 43 /* LessThanLessThanToken */:
+                case 44 /* GreaterThanGreaterThanToken */:
+                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
+                    return 8;
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                    return 9;
+                case 37 /* AsteriskToken */:
+                case 39 /* SlashToken */:
+                case 40 /* PercentToken */:
+                    return 10;
+                case 38 /* AsteriskAsteriskToken */:
+                    return 11;
+            }
+            // -1 is lower than all other precedences.  Returning it will cause binary expression
+            // parsing to stop.
+            return -1;
+        }
+        function makeBinaryExpression(left, operatorToken, right) {
+            var node = createNode(187 /* BinaryExpression */, left.pos);
+            node.left = left;
+            node.operatorToken = operatorToken;
+            node.right = right;
+            return finishNode(node);
+        }
+        function makeAsExpression(left, right) {
+            var node = createNode(195 /* AsExpression */, left.pos);
+            node.expression = left;
+            node.type = right;
+            return finishNode(node);
+        }
+        function parsePrefixUnaryExpression() {
+            var node = createNode(185 /* PrefixUnaryExpression */);
+            node.operator = token;
+            nextToken();
+            node.operand = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseDeleteExpression() {
+            var node = createNode(181 /* DeleteExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseTypeOfExpression() {
+            var node = createNode(182 /* TypeOfExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseVoidExpression() {
+            var node = createNode(183 /* VoidExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function isAwaitExpression() {
+            if (token === 119 /* AwaitKeyword */) {
+                if (inAwaitContext()) {
+                    return true;
+                }
+                // here we are using similar heuristics as 'isYieldExpression'
+                return lookAhead(nextTokenIsIdentifierOnSameLine);
+            }
+            return false;
+        }
+        function parseAwaitExpression() {
+            var node = createNode(184 /* AwaitExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        /**
+         * Parse ES7 unary expression and await expression
+         *
+         * ES7 UnaryExpression:
+         *      1) SimpleUnaryExpression[?yield]
+         *      2) IncrementExpression[?yield] ** UnaryExpression[?yield]
+         */
+        function parseUnaryExpressionOrHigher() {
+            if (isAwaitExpression()) {
+                return parseAwaitExpression();
+            }
+            if (isIncrementExpression()) {
+                var incrementExpression = parseIncrementExpression();
+                return token === 38 /* AsteriskAsteriskToken */ ?
+                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), incrementExpression) :
+                    incrementExpression;
+            }
+            var unaryOperator = token;
+            var simpleUnaryExpression = parseSimpleUnaryExpression();
+            if (token === 38 /* AsteriskAsteriskToken */) {
+                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
+                if (simpleUnaryExpression.kind === 177 /* TypeAssertionExpression */) {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
+                }
+                else {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
+                }
+            }
+            return simpleUnaryExpression;
+        }
+        /**
+         * Parse ES7 simple-unary expression or higher:
+         *
+         * ES7 SimpleUnaryExpression:
+         *      1) IncrementExpression[?yield]
+         *      2) delete UnaryExpression[?yield]
+         *      3) void UnaryExpression[?yield]
+         *      4) typeof UnaryExpression[?yield]
+         *      5) + UnaryExpression[?yield]
+         *      6) - UnaryExpression[?yield]
+         *      7) ~ UnaryExpression[?yield]
+         *      8) ! UnaryExpression[?yield]
+         */
+        function parseSimpleUnaryExpression() {
+            switch (token) {
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                case 50 /* TildeToken */:
+                case 49 /* ExclamationToken */:
+                    return parsePrefixUnaryExpression();
+                case 78 /* DeleteKeyword */:
+                    return parseDeleteExpression();
+                case 101 /* TypeOfKeyword */:
+                    return parseTypeOfExpression();
+                case 103 /* VoidKeyword */:
+                    return parseVoidExpression();
+                case 25 /* LessThanToken */:
+                    // This is modified UnaryExpression grammar in TypeScript
+                    //  UnaryExpression (modified):
+                    //      < type > UnaryExpression
+                    return parseTypeAssertion();
+                default:
+                    return parseIncrementExpression();
+            }
+        }
+        /**
+         * Check if the current token can possibly be an ES7 increment expression.
+         *
+         * ES7 IncrementExpression:
+         *      LeftHandSideExpression[?Yield]
+         *      LeftHandSideExpression[?Yield][no LineTerminator here]++
+         *      LeftHandSideExpression[?Yield][no LineTerminator here]--
+         *      ++LeftHandSideExpression[?Yield]
+         *      --LeftHandSideExpression[?Yield]
+         */
+        function isIncrementExpression() {
+            // This function is called inside parseUnaryExpression to decide
+            // whether to call parseSimpleUnaryExpression or call parseIncrementExpression directly
+            switch (token) {
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                case 50 /* TildeToken */:
+                case 49 /* ExclamationToken */:
+                case 78 /* DeleteKeyword */:
+                case 101 /* TypeOfKeyword */:
+                case 103 /* VoidKeyword */:
+                    return false;
+                case 25 /* LessThanToken */:
+                    // If we are not in JSX context, we are parsing TypeAssertion which is an UnaryExpression
+                    if (sourceFile.languageVariant !== 1 /* JSX */) {
+                        return false;
+                    }
+                // We are in JSX context and the token is part of JSXElement.
+                // Fall through
+                default:
+                    return true;
+            }
+        }
+        /**
+         * Parse ES7 IncrementExpression. IncrementExpression is used instead of ES6's PostFixExpression.
+         *
+         * ES7 IncrementExpression[yield]:
+         *      1) LeftHandSideExpression[?yield]
+         *      2) LeftHandSideExpression[?yield] [[no LineTerminator here]]++
+         *      3) LeftHandSideExpression[?yield] [[no LineTerminator here]]--
+         *      4) ++LeftHandSideExpression[?yield]
+         *      5) --LeftHandSideExpression[?yield]
+         * In TypeScript (2), (3) are parsed as PostfixUnaryExpression. (4), (5) are parsed as PrefixUnaryExpression
+         */
+        function parseIncrementExpression() {
+            if (token === 41 /* PlusPlusToken */ || token === 42 /* MinusMinusToken */) {
+                var node = createNode(185 /* PrefixUnaryExpression */);
+                node.operator = token;
+                nextToken();
+                node.operand = parseLeftHandSideExpressionOrHigher();
+                return finishNode(node);
+            }
+            else if (sourceFile.languageVariant === 1 /* JSX */ && token === 25 /* LessThanToken */ && lookAhead(nextTokenIsIdentifierOrKeyword)) {
+                // JSXElement is part of primaryExpression
+                return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true);
+            }
+            var expression = parseLeftHandSideExpressionOrHigher();
+            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
+            if ((token === 41 /* PlusPlusToken */ || token === 42 /* MinusMinusToken */) && !scanner.hasPrecedingLineBreak()) {
+                var node = createNode(186 /* PostfixUnaryExpression */, expression.pos);
+                node.operand = expression;
+                node.operator = token;
+                nextToken();
+                return finishNode(node);
+            }
+            return expression;
+        }
+        function parseLeftHandSideExpressionOrHigher() {
+            // Original Ecma:
+            // LeftHandSideExpression: See 11.2
+            //      NewExpression
+            //      CallExpression
+            //
+            // Our simplification:
+            //
+            // LeftHandSideExpression: See 11.2
+            //      MemberExpression
+            //      CallExpression
+            //
+            // See comment in parseMemberExpressionOrHigher on how we replaced NewExpression with
+            // MemberExpression to make our lives easier.
+            //
+            // to best understand the below code, it's important to see how CallExpression expands
+            // out into its own productions:
+            //
+            // CallExpression:
+            //      MemberExpression Arguments
+            //      CallExpression Arguments
+            //      CallExpression[Expression]
+            //      CallExpression.IdentifierName
+            //      super   (   ArgumentListopt   )
+            //      super.IdentifierName
+            //
+            // Because of the recursion in these calls, we need to bottom out first.  There are two
+            // bottom out states we can run into.  Either we see 'super' which must start either of
+            // the last two CallExpression productions.  Or we have a MemberExpression which either
+            // completes the LeftHandSideExpression, or starts the beginning of the first four
+            // CallExpression productions.
+            var expression = token === 95 /* SuperKeyword */
+                ? parseSuperExpression()
+                : parseMemberExpressionOrHigher();
+            // Now, we *may* be complete.  However, we might have consumed the start of a
+            // CallExpression.  As such, we need to consume the rest of it here to be complete.
+            return parseCallExpressionRest(expression);
+        }
+        function parseMemberExpressionOrHigher() {
+            // Note: to make our lives simpler, we decompose the the NewExpression productions and
+            // place ObjectCreationExpression and FunctionExpression into PrimaryExpression.
+            // like so:
+            //
+            //   PrimaryExpression : See 11.1
+            //      this
+            //      Identifier
+            //      Literal
+            //      ArrayLiteral
+            //      ObjectLiteral
+            //      (Expression)
+            //      FunctionExpression
+            //      new MemberExpression Arguments?
+            //
+            //   MemberExpression : See 11.2
+            //      PrimaryExpression
+            //      MemberExpression[Expression]
+            //      MemberExpression.IdentifierName
+            //
+            //   CallExpression : See 11.2
+            //      MemberExpression
+            //      CallExpression Arguments
+            //      CallExpression[Expression]
+            //      CallExpression.IdentifierName
+            //
+            // Technically this is ambiguous.  i.e. CallExpression defines:
+            //
+            //   CallExpression:
+            //      CallExpression Arguments
+            //
+            // If you see: "new Foo()"
+            //
+            // Then that could be treated as a single ObjectCreationExpression, or it could be
+            // treated as the invocation of "new Foo".  We disambiguate that in code (to match
+            // the original grammar) by making sure that if we see an ObjectCreationExpression
+            // we always consume arguments if they are there. So we treat "new Foo()" as an
+            // object creation only, and not at all as an invocation)  Another way to think
+            // about this is that for every "new" that we see, we will consume an argument list if
+            // it is there as part of the *associated* object creation node.  Any additional
+            // argument lists we see, will become invocation expressions.
+            //
+            // Because there are no other places in the grammar now that refer to FunctionExpression
+            // or ObjectCreationExpression, it is safe to push down into the PrimaryExpression
+            // production.
+            //
+            // Because CallExpression and MemberExpression are left recursive, we need to bottom out
+            // of the recursion immediately.  So we parse out a primary expression to start with.
+            var expression = parsePrimaryExpression();
+            return parseMemberExpressionRest(expression);
+        }
+        function parseSuperExpression() {
+            var expression = parseTokenNode();
+            if (token === 17 /* OpenParenToken */ || token === 21 /* DotToken */ || token === 19 /* OpenBracketToken */) {
+                return expression;
+            }
+            // If we have seen "super" it must be followed by '(' or '.'.
+            // If it wasn't then just try to parse out a '.' and report an error.
+            var node = createNode(172 /* PropertyAccessExpression */, expression.pos);
+            node.expression = expression;
+            node.dotToken = parseExpectedToken(21 /* DotToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
+            node.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
+            return finishNode(node);
+        }
+        function tagNamesAreEquivalent(lhs, rhs) {
+            if (lhs.kind !== rhs.kind) {
+                return false;
+            }
+            if (lhs.kind === 69 /* Identifier */) {
+                return lhs.text === rhs.text;
+            }
+            return lhs.right.text === rhs.right.text &&
+                tagNamesAreEquivalent(lhs.left, rhs.left);
+        }
+        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
+            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
+            var result;
+            if (opening.kind === 243 /* JsxOpeningElement */) {
+                var node = createNode(241 /* JsxElement */, opening.pos);
+                node.openingElement = opening;
+                node.children = parseJsxChildren(node.openingElement.tagName);
+                node.closingElement = parseJsxClosingElement(inExpressionContext);
+                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
+                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
+                }
+                result = finishNode(node);
+            }
+            else {
+                ts.Debug.assert(opening.kind === 242 /* JsxSelfClosingElement */);
+                // Nothing else to do for self-closing elements
+                result = opening;
+            }
+            // If the user writes the invalid code '<div></div><div></div>' in an expression context (i.e. not wrapped in
+            // an enclosing tag), we'll naively try to parse   ^ this as a 'less than' operator and the remainder of the tag
+            // as garbage, which will cause the formatter to badly mangle the JSX. Perform a speculative parse of a JSX
+            // element if we see a < token so that we can wrap it in a synthetic binary expression so the formatter
+            // does less damage and we can report a better error.
+            // Since JSX elements are invalid < operands anyway, this lookahead parse will only occur in error scenarios
+            // of one sort or another.
+            if (inExpressionContext && token === 25 /* LessThanToken */) {
+                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true); });
+                if (invalidElement) {
+                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
+                    var badNode = createNode(187 /* BinaryExpression */, result.pos);
+                    badNode.end = invalidElement.end;
+                    badNode.left = result;
+                    badNode.right = invalidElement;
+                    badNode.operatorToken = createMissingNode(24 /* CommaToken */, /*reportAtCurrentPosition*/ false, /*diagnosticMessage*/ undefined);
+                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
+                    return badNode;
+                }
+            }
+            return result;
+        }
+        function parseJsxText() {
+            var node = createNode(244 /* JsxText */, scanner.getStartPos());
+            token = scanner.scanJsxToken();
+            return finishNode(node);
+        }
+        function parseJsxChild() {
+            switch (token) {
+                case 244 /* JsxText */:
+                    return parseJsxText();
+                case 15 /* OpenBraceToken */:
+                    return parseJsxExpression(/*inExpressionContext*/ false);
+                case 25 /* LessThanToken */:
+                    return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ false);
+            }
+            ts.Debug.fail("Unknown JSX child kind " + token);
+        }
+        function parseJsxChildren(openingTagName) {
+            var result = [];
+            result.pos = scanner.getStartPos();
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << 14 /* JsxChildren */;
+            while (true) {
+                token = scanner.reScanJsxToken();
+                if (token === 26 /* LessThanSlashToken */) {
+                    // Closing tag
+                    break;
+                }
+                else if (token === 1 /* EndOfFileToken */) {
+                    // If we hit EOF, issue the error at the tag that lacks the closing element
+                    // rather than at the end of the file (which is useless)
+                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
+                    break;
+                }
+                result.push(parseJsxChild());
+            }
+            result.end = scanner.getTokenPos();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
+            var fullStart = scanner.getStartPos();
+            parseExpected(25 /* LessThanToken */);
+            var tagName = parseJsxElementName();
+            var attributes = parseList(13 /* JsxAttributes */, parseJsxAttribute);
+            var node;
+            if (token === 27 /* GreaterThanToken */) {
+                // Closing tag, so scan the immediately-following text with the JSX scanning instead
+                // of regular scanning to avoid treating illegal characters (e.g. '#') as immediate
+                // scanning errors
+                node = createNode(243 /* JsxOpeningElement */, fullStart);
+                scanJsxText();
+            }
+            else {
+                parseExpected(39 /* SlashToken */);
+                if (inExpressionContext) {
+                    parseExpected(27 /* GreaterThanToken */);
+                }
+                else {
+                    parseExpected(27 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
+                    scanJsxText();
+                }
+                node = createNode(242 /* JsxSelfClosingElement */, fullStart);
+            }
+            node.tagName = tagName;
+            node.attributes = attributes;
+            return finishNode(node);
+        }
+        function parseJsxElementName() {
+            scanJsxIdentifier();
+            var elementName = parseIdentifierName();
+            while (parseOptional(21 /* DotToken */)) {
+                scanJsxIdentifier();
+                var node = createNode(139 /* QualifiedName */, elementName.pos); // !!!
+                node.left = elementName;
+                node.right = parseIdentifierName();
+                elementName = finishNode(node);
+            }
+            return elementName;
+        }
+        function parseJsxExpression(inExpressionContext) {
+            var node = createNode(248 /* JsxExpression */);
+            parseExpected(15 /* OpenBraceToken */);
+            if (token !== 16 /* CloseBraceToken */) {
+                node.expression = parseAssignmentExpressionOrHigher();
+            }
+            if (inExpressionContext) {
+                parseExpected(16 /* CloseBraceToken */);
+            }
+            else {
+                parseExpected(16 /* CloseBraceToken */, /*message*/ undefined, /*shouldAdvance*/ false);
+                scanJsxText();
+            }
+            return finishNode(node);
+        }
+        function parseJsxAttribute() {
+            if (token === 15 /* OpenBraceToken */) {
+                return parseJsxSpreadAttribute();
+            }
+            scanJsxIdentifier();
+            var node = createNode(246 /* JsxAttribute */);
+            node.name = parseIdentifierName();
+            if (parseOptional(56 /* EqualsToken */)) {
+                switch (token) {
+                    case 9 /* StringLiteral */:
+                        node.initializer = parseLiteralNode();
+                        break;
+                    default:
+                        node.initializer = parseJsxExpression(/*inExpressionContext*/ true);
+                        break;
+                }
+            }
+            return finishNode(node);
+        }
+        function parseJsxSpreadAttribute() {
+            var node = createNode(247 /* JsxSpreadAttribute */);
+            parseExpected(15 /* OpenBraceToken */);
+            parseExpected(22 /* DotDotDotToken */);
+            node.expression = parseExpression();
+            parseExpected(16 /* CloseBraceToken */);
+            return finishNode(node);
+        }
+        function parseJsxClosingElement(inExpressionContext) {
+            var node = createNode(245 /* JsxClosingElement */);
+            parseExpected(26 /* LessThanSlashToken */);
+            node.tagName = parseJsxElementName();
+            if (inExpressionContext) {
+                parseExpected(27 /* GreaterThanToken */);
+            }
+            else {
+                parseExpected(27 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
+                scanJsxText();
+            }
+            return finishNode(node);
+        }
+        function parseTypeAssertion() {
+            var node = createNode(177 /* TypeAssertionExpression */);
+            parseExpected(25 /* LessThanToken */);
+            node.type = parseType();
+            parseExpected(27 /* GreaterThanToken */);
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseMemberExpressionRest(expression) {
+            while (true) {
+                var dotToken = parseOptionalToken(21 /* DotToken */);
+                if (dotToken) {
+                    var propertyAccess = createNode(172 /* PropertyAccessExpression */, expression.pos);
+                    propertyAccess.expression = expression;
+                    propertyAccess.dotToken = dotToken;
+                    propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
+                    expression = finishNode(propertyAccess);
+                    continue;
+                }
+                if (token === 49 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
+                    nextToken();
+                    var nonNullExpression = createNode(196 /* NonNullExpression */, expression.pos);
+                    nonNullExpression.expression = expression;
+                    expression = finishNode(nonNullExpression);
+                    continue;
+                }
+                // when in the [Decorator] context, we do not parse ElementAccess as it could be part of a ComputedPropertyName
+                if (!inDecoratorContext() && parseOptional(19 /* OpenBracketToken */)) {
+                    var indexedAccess = createNode(173 /* ElementAccessExpression */, expression.pos);
+                    indexedAccess.expression = expression;
+                    // It's not uncommon for a user to write: "new Type[]".
+                    // Check for that common pattern and report a better error message.
+                    if (token !== 20 /* CloseBracketToken */) {
+                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
+                        if (indexedAccess.argumentExpression.kind === 9 /* StringLiteral */ || indexedAccess.argumentExpression.kind === 8 /* NumericLiteral */) {
+                            var literal = indexedAccess.argumentExpression;
+                            literal.text = internIdentifier(literal.text);
+                        }
+                    }
+                    parseExpected(20 /* CloseBracketToken */);
+                    expression = finishNode(indexedAccess);
+                    continue;
+                }
+                if (token === 11 /* NoSubstitutionTemplateLiteral */ || token === 12 /* TemplateHead */) {
+                    var tagExpression = createNode(176 /* TaggedTemplateExpression */, expression.pos);
+                    tagExpression.tag = expression;
+                    tagExpression.template = token === 11 /* NoSubstitutionTemplateLiteral */
+                        ? parseLiteralNode()
+                        : parseTemplateExpression();
+                    expression = finishNode(tagExpression);
+                    continue;
+                }
+                return expression;
+            }
+        }
+        function parseCallExpressionRest(expression) {
+            while (true) {
+                expression = parseMemberExpressionRest(expression);
+                if (token === 25 /* LessThanToken */) {
+                    // See if this is the start of a generic invocation.  If so, consume it and
+                    // keep checking for postfix expressions.  Otherwise, it's just a '<' that's
+                    // part of an arithmetic expression.  Break out so we consume it higher in the
+                    // stack.
+                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
+                    if (!typeArguments) {
+                        return expression;
+                    }
+                    var callExpr = createNode(174 /* CallExpression */, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.typeArguments = typeArguments;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                else if (token === 17 /* OpenParenToken */) {
+                    var callExpr = createNode(174 /* CallExpression */, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                return expression;
+            }
+        }
+        function parseArgumentList() {
+            parseExpected(17 /* OpenParenToken */);
+            var result = parseDelimitedList(11 /* ArgumentExpressions */, parseArgumentExpression);
+            parseExpected(18 /* CloseParenToken */);
+            return result;
+        }
+        function parseTypeArgumentsInExpression() {
+            if (!parseOptional(25 /* LessThanToken */)) {
+                return undefined;
+            }
+            var typeArguments = parseDelimitedList(18 /* TypeArguments */, parseType);
+            if (!parseExpected(27 /* GreaterThanToken */)) {
+                // If it doesn't have the closing >  then it's definitely not an type argument list.
+                return undefined;
+            }
+            // If we have a '<', then only parse this as a argument list if the type arguments
+            // are complete and we have an open paren.  if we don't, rewind and return nothing.
+            return typeArguments && canFollowTypeArgumentsInExpression()
+                ? typeArguments
+                : undefined;
+        }
+        function canFollowTypeArgumentsInExpression() {
+            switch (token) {
+                case 17 /* OpenParenToken */: // foo<x>(
+                // this case are the only case where this token can legally follow a type argument
+                // list.  So we definitely want to treat this as a type arg list.
+                case 21 /* DotToken */: // foo<x>.
+                case 18 /* CloseParenToken */: // foo<x>)
+                case 20 /* CloseBracketToken */: // foo<x>]
+                case 54 /* ColonToken */: // foo<x>:
+                case 23 /* SemicolonToken */: // foo<x>;
+                case 53 /* QuestionToken */: // foo<x>?
+                case 30 /* EqualsEqualsToken */: // foo<x> ==
+                case 32 /* EqualsEqualsEqualsToken */: // foo<x> ===
+                case 31 /* ExclamationEqualsToken */: // foo<x> !=
+                case 33 /* ExclamationEqualsEqualsToken */: // foo<x> !==
+                case 51 /* AmpersandAmpersandToken */: // foo<x> &&
+                case 52 /* BarBarToken */: // foo<x> ||
+                case 48 /* CaretToken */: // foo<x> ^
+                case 46 /* AmpersandToken */: // foo<x> &
+                case 47 /* BarToken */: // foo<x> |
+                case 16 /* CloseBraceToken */: // foo<x> }
+                case 1 /* EndOfFileToken */:
+                    // these cases can't legally follow a type arg list.  However, they're not legal
+                    // expressions either.  The user is probably in the middle of a generic type. So
+                    // treat it as such.
+                    return true;
+                case 24 /* CommaToken */: // foo<x>,
+                case 15 /* OpenBraceToken */: // foo<x> {
+                // We don't want to treat these as type arguments.  Otherwise we'll parse this
+                // as an invocation expression.  Instead, we want to parse out the expression
+                // in isolation from the type arguments.
+                default:
+                    // Anything else treat as an expression.
+                    return false;
+            }
+        }
+        function parsePrimaryExpression() {
+            switch (token) {
+                case 8 /* NumericLiteral */:
+                case 9 /* StringLiteral */:
+                case 11 /* NoSubstitutionTemplateLiteral */:
+                    return parseLiteralNode();
+                case 97 /* ThisKeyword */:
+                case 95 /* SuperKeyword */:
+                case 93 /* NullKeyword */:
+                case 99 /* TrueKeyword */:
+                case 84 /* FalseKeyword */:
+                    return parseTokenNode();
+                case 17 /* OpenParenToken */:
+                    return parseParenthesizedExpression();
+                case 19 /* OpenBracketToken */:
+                    return parseArrayLiteralExpression();
+                case 15 /* OpenBraceToken */:
+                    return parseObjectLiteralExpression();
+                case 118 /* AsyncKeyword */:
+                    // Async arrow functions are parsed earlier in parseAssignmentExpressionOrHigher.
+                    // If we encounter `async [no LineTerminator here] function` then this is an async
+                    // function; otherwise, its an identifier.
+                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
+                        break;
+                    }
+                    return parseFunctionExpression();
+                case 73 /* ClassKeyword */:
+                    return parseClassExpression();
+                case 87 /* FunctionKeyword */:
+                    return parseFunctionExpression();
+                case 92 /* NewKeyword */:
+                    return parseNewExpression();
+                case 39 /* SlashToken */:
+                case 61 /* SlashEqualsToken */:
+                    if (reScanSlashToken() === 10 /* RegularExpressionLiteral */) {
+                        return parseLiteralNode();
+                    }
+                    break;
+                case 12 /* TemplateHead */:
+                    return parseTemplateExpression();
+            }
+            return parseIdentifier(ts.Diagnostics.Expression_expected);
+        }
+        function parseParenthesizedExpression() {
+            var node = createNode(178 /* ParenthesizedExpression */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18 /* CloseParenToken */);
+            return finishNode(node);
+        }
+        function parseSpreadElement() {
+            var node = createNode(191 /* SpreadElementExpression */);
+            parseExpected(22 /* DotDotDotToken */);
+            node.expression = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
+        }
+        function parseArgumentOrArrayLiteralElement() {
+            return token === 22 /* DotDotDotToken */ ? parseSpreadElement() :
+                token === 24 /* CommaToken */ ? createNode(193 /* OmittedExpression */) :
+                    parseAssignmentExpressionOrHigher();
+        }
+        function parseArgumentExpression() {
+            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
+        }
+        function parseArrayLiteralExpression() {
+            var node = createNode(170 /* ArrayLiteralExpression */);
+            parseExpected(19 /* OpenBracketToken */);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.elements = parseDelimitedList(15 /* ArrayLiteralMembers */, parseArgumentOrArrayLiteralElement);
+            parseExpected(20 /* CloseBracketToken */);
+            return finishNode(node);
+        }
+        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
+            if (parseContextualModifier(123 /* GetKeyword */)) {
+                return addJSDocComment(parseAccessorDeclaration(149 /* GetAccessor */, fullStart, decorators, modifiers));
+            }
+            else if (parseContextualModifier(131 /* SetKeyword */)) {
+                return parseAccessorDeclaration(150 /* SetAccessor */, fullStart, decorators, modifiers);
+            }
+            return undefined;
+        }
+        function parseObjectLiteralElement() {
+            var fullStart = scanner.getStartPos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
+            }
+            var asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            // Disallowing of optional property assignments happens in the grammar checker.
+            var questionToken = parseOptionalToken(53 /* QuestionToken */);
+            if (asteriskToken || token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
+            }
+            // check if it is short-hand property assignment or normal property assignment
+            // NOTE: if token is EqualsToken it is interpreted as CoverInitializedName production
+            // CoverInitializedName[Yield] :
+            //     IdentifierReference[?Yield] Initializer[In, ?Yield]
+            // this is necessary because ObjectLiteral productions are also used to cover grammar for ObjectAssignmentPattern
+            var isShorthandPropertyAssignment = tokenIsIdentifier && (token === 24 /* CommaToken */ || token === 16 /* CloseBraceToken */ || token === 56 /* EqualsToken */);
+            if (isShorthandPropertyAssignment) {
+                var shorthandDeclaration = createNode(254 /* ShorthandPropertyAssignment */, fullStart);
+                shorthandDeclaration.name = propertyName;
+                shorthandDeclaration.questionToken = questionToken;
+                var equalsToken = parseOptionalToken(56 /* EqualsToken */);
+                if (equalsToken) {
+                    shorthandDeclaration.equalsToken = equalsToken;
+                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                }
+                return addJSDocComment(finishNode(shorthandDeclaration));
+            }
+            else {
+                var propertyAssignment = createNode(253 /* PropertyAssignment */, fullStart);
+                propertyAssignment.modifiers = modifiers;
+                propertyAssignment.name = propertyName;
+                propertyAssignment.questionToken = questionToken;
+                parseExpected(54 /* ColonToken */);
+                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                return addJSDocComment(finishNode(propertyAssignment));
+            }
+        }
+        function parseObjectLiteralExpression() {
+            var node = createNode(171 /* ObjectLiteralExpression */);
+            parseExpected(15 /* OpenBraceToken */);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.properties = parseDelimitedList(12 /* ObjectLiteralMembers */, parseObjectLiteralElement, /*considerSemicolonAsDelimiter*/ true);
+            parseExpected(16 /* CloseBraceToken */);
+            return finishNode(node);
+        }
+        function parseFunctionExpression() {
+            // GeneratorExpression:
+            //      function* BindingIdentifier [Yield][opt](FormalParameters[Yield]){ GeneratorBody }
+            //
+            // FunctionExpression:
+            //      function BindingIdentifier[opt](FormalParameters){ FunctionBody }
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ false);
+            }
+            var node = createNode(179 /* FunctionExpression */);
+            setModifiers(node, parseModifiers());
+            parseExpected(87 /* FunctionKeyword */);
+            node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = !!(node.flags & 256 /* Async */);
+            node.name =
+                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
+                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
+                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
+                            parseOptionalIdentifier();
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlock(/*allowYield*/ isGenerator, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ true);
+            }
+            return addJSDocComment(finishNode(node));
+        }
+        function parseOptionalIdentifier() {
+            return isIdentifier() ? parseIdentifier() : undefined;
+        }
+        function parseNewExpression() {
+            var node = createNode(175 /* NewExpression */);
+            parseExpected(92 /* NewKeyword */);
+            node.expression = parseMemberExpressionOrHigher();
+            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
+            if (node.typeArguments || token === 17 /* OpenParenToken */) {
+                node.arguments = parseArgumentList();
+            }
+            return finishNode(node);
+        }
+        // STATEMENTS
+        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
+            var node = createNode(199 /* Block */);
+            if (parseExpected(15 /* OpenBraceToken */, diagnosticMessage) || ignoreMissingOpenBrace) {
+                node.statements = parseList(1 /* BlockStatements */, parseStatement);
+                parseExpected(16 /* CloseBraceToken */);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
+            var savedYieldContext = inYieldContext();
+            setYieldContext(allowYield);
+            var savedAwaitContext = inAwaitContext();
+            setAwaitContext(allowAwait);
+            // We may be in a [Decorator] context when parsing a function expression or
+            // arrow function. The body of the function is not in [Decorator] context.
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ false);
+            }
+            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ true);
+            }
+            setYieldContext(savedYieldContext);
+            setAwaitContext(savedAwaitContext);
+            return block;
+        }
+        function parseEmptyStatement() {
+            var node = createNode(201 /* EmptyStatement */);
+            parseExpected(23 /* SemicolonToken */);
+            return finishNode(node);
+        }
+        function parseIfStatement() {
+            var node = createNode(203 /* IfStatement */);
+            parseExpected(88 /* IfKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18 /* CloseParenToken */);
+            node.thenStatement = parseStatement();
+            node.elseStatement = parseOptional(80 /* ElseKeyword */) ? parseStatement() : undefined;
+            return finishNode(node);
+        }
+        function parseDoStatement() {
+            var node = createNode(204 /* DoStatement */);
+            parseExpected(79 /* DoKeyword */);
+            node.statement = parseStatement();
+            parseExpected(104 /* WhileKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18 /* CloseParenToken */);
+            // From: https://mail.mozilla.org/pipermail/es-discuss/2011-August/016188.html
+            // 157 min --- All allen at wirfs-brock.com CONF --- "do{;}while(false)false" prohibited in
+            // spec but allowed in consensus reality. Approved -- this is the de-facto standard whereby
+            //  do;while(0)x will have a semicolon inserted before x.
+            parseOptional(23 /* SemicolonToken */);
+            return finishNode(node);
+        }
+        function parseWhileStatement() {
+            var node = createNode(205 /* WhileStatement */);
+            parseExpected(104 /* WhileKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18 /* CloseParenToken */);
+            node.statement = parseStatement();
+            return finishNode(node);
+        }
+        function parseForOrForInOrForOfStatement() {
+            var pos = getNodePos();
+            parseExpected(86 /* ForKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            var initializer = undefined;
+            if (token !== 23 /* SemicolonToken */) {
+                if (token === 102 /* VarKeyword */ || token === 108 /* LetKeyword */ || token === 74 /* ConstKeyword */) {
+                    initializer = parseVariableDeclarationList(/*inForStatementInitializer*/ true);
+                }
+                else {
+                    initializer = disallowInAnd(parseExpression);
+                }
+            }
+            var forOrForInOrForOfStatement;
+            if (parseOptional(90 /* InKeyword */)) {
+                var forInStatement = createNode(207 /* ForInStatement */, pos);
+                forInStatement.initializer = initializer;
+                forInStatement.expression = allowInAnd(parseExpression);
+                parseExpected(18 /* CloseParenToken */);
+                forOrForInOrForOfStatement = forInStatement;
+            }
+            else if (parseOptional(138 /* OfKeyword */)) {
+                var forOfStatement = createNode(208 /* ForOfStatement */, pos);
+                forOfStatement.initializer = initializer;
+                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
+                parseExpected(18 /* CloseParenToken */);
+                forOrForInOrForOfStatement = forOfStatement;
+            }
+            else {
+                var forStatement = createNode(206 /* ForStatement */, pos);
+                forStatement.initializer = initializer;
+                parseExpected(23 /* SemicolonToken */);
+                if (token !== 23 /* SemicolonToken */ && token !== 18 /* CloseParenToken */) {
+                    forStatement.condition = allowInAnd(parseExpression);
+                }
+                parseExpected(23 /* SemicolonToken */);
+                if (token !== 18 /* CloseParenToken */) {
+                    forStatement.incrementor = allowInAnd(parseExpression);
+                }
+                parseExpected(18 /* CloseParenToken */);
+                forOrForInOrForOfStatement = forStatement;
+            }
+            forOrForInOrForOfStatement.statement = parseStatement();
+            return finishNode(forOrForInOrForOfStatement);
+        }
+        function parseBreakOrContinueStatement(kind) {
+            var node = createNode(kind);
+            parseExpected(kind === 210 /* BreakStatement */ ? 70 /* BreakKeyword */ : 75 /* ContinueKeyword */);
+            if (!canParseSemicolon()) {
+                node.label = parseIdentifier();
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseReturnStatement() {
+            var node = createNode(211 /* ReturnStatement */);
+            parseExpected(94 /* ReturnKeyword */);
+            if (!canParseSemicolon()) {
+                node.expression = allowInAnd(parseExpression);
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseWithStatement() {
+            var node = createNode(212 /* WithStatement */);
+            parseExpected(105 /* WithKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18 /* CloseParenToken */);
+            node.statement = parseStatement();
+            return finishNode(node);
+        }
+        function parseCaseClause() {
+            var node = createNode(249 /* CaseClause */);
+            parseExpected(71 /* CaseKeyword */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(54 /* ColonToken */);
+            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
+            return finishNode(node);
+        }
+        function parseDefaultClause() {
+            var node = createNode(250 /* DefaultClause */);
+            parseExpected(77 /* DefaultKeyword */);
+            parseExpected(54 /* ColonToken */);
+            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
+            return finishNode(node);
+        }
+        function parseCaseOrDefaultClause() {
+            return token === 71 /* CaseKeyword */ ? parseCaseClause() : parseDefaultClause();
+        }
+        function parseSwitchStatement() {
+            var node = createNode(213 /* SwitchStatement */);
+            parseExpected(96 /* SwitchKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18 /* CloseParenToken */);
+            var caseBlock = createNode(227 /* CaseBlock */, scanner.getStartPos());
+            parseExpected(15 /* OpenBraceToken */);
+            caseBlock.clauses = parseList(2 /* SwitchClauses */, parseCaseOrDefaultClause);
+            parseExpected(16 /* CloseBraceToken */);
+            node.caseBlock = finishNode(caseBlock);
+            return finishNode(node);
+        }
+        function parseThrowStatement() {
+            // ThrowStatement[Yield] :
+            //      throw [no LineTerminator here]Expression[In, ?Yield];
+            // Because of automatic semicolon insertion, we need to report error if this
+            // throw could be terminated with a semicolon.  Note: we can't call 'parseExpression'
+            // directly as that might consume an expression on the following line.
+            // We just return 'undefined' in that case.  The actual error will be reported in the
+            // grammar walker.
+            var node = createNode(215 /* ThrowStatement */);
+            parseExpected(98 /* ThrowKeyword */);
+            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
+            parseSemicolon();
+            return finishNode(node);
+        }
+        // TODO: Review for error recovery
+        function parseTryStatement() {
+            var node = createNode(216 /* TryStatement */);
+            parseExpected(100 /* TryKeyword */);
+            node.tryBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            node.catchClause = token === 72 /* CatchKeyword */ ? parseCatchClause() : undefined;
+            // If we don't have a catch clause, then we must have a finally clause.  Try to parse
+            // one out no matter what.
+            if (!node.catchClause || token === 85 /* FinallyKeyword */) {
+                parseExpected(85 /* FinallyKeyword */);
+                node.finallyBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            }
+            return finishNode(node);
+        }
+        function parseCatchClause() {
+            var result = createNode(252 /* CatchClause */);
+            parseExpected(72 /* CatchKeyword */);
+            if (parseExpected(17 /* OpenParenToken */)) {
+                result.variableDeclaration = parseVariableDeclaration();
+            }
+            parseExpected(18 /* CloseParenToken */);
+            result.block = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            return finishNode(result);
+        }
+        function parseDebuggerStatement() {
+            var node = createNode(217 /* DebuggerStatement */);
+            parseExpected(76 /* DebuggerKeyword */);
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseExpressionOrLabeledStatement() {
+            // Avoiding having to do the lookahead for a labeled statement by just trying to parse
+            // out an expression, seeing if it is identifier and then seeing if it is followed by
+            // a colon.
+            var fullStart = scanner.getStartPos();
+            var expression = allowInAnd(parseExpression);
+            if (expression.kind === 69 /* Identifier */ && parseOptional(54 /* ColonToken */)) {
+                var labeledStatement = createNode(214 /* LabeledStatement */, fullStart);
+                labeledStatement.label = expression;
+                labeledStatement.statement = parseStatement();
+                return addJSDocComment(finishNode(labeledStatement));
+            }
+            else {
+                var expressionStatement = createNode(202 /* ExpressionStatement */, fullStart);
+                expressionStatement.expression = expression;
+                parseSemicolon();
+                return addJSDocComment(finishNode(expressionStatement));
+            }
+        }
+        function nextTokenIsIdentifierOrKeywordOnSameLine() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token) && !scanner.hasPrecedingLineBreak();
+        }
+        function nextTokenIsFunctionKeywordOnSameLine() {
+            nextToken();
+            return token === 87 /* FunctionKeyword */ && !scanner.hasPrecedingLineBreak();
+        }
+        function nextTokenIsIdentifierOrKeywordOrNumberOnSameLine() {
+            nextToken();
+            return (ts.tokenIsIdentifierOrKeyword(token) || token === 8 /* NumericLiteral */) && !scanner.hasPrecedingLineBreak();
+        }
+        function isDeclaration() {
+            while (true) {
+                switch (token) {
+                    case 102 /* VarKeyword */:
+                    case 108 /* LetKeyword */:
+                    case 74 /* ConstKeyword */:
+                    case 87 /* FunctionKeyword */:
+                    case 73 /* ClassKeyword */:
+                    case 81 /* EnumKeyword */:
+                        return true;
+                    // 'declare', 'module', 'namespace', 'interface'* and 'type' are all legal JavaScript identifiers;
+                    // however, an identifier cannot be followed by another identifier on the same line. This is what we
+                    // count on to parse out the respective declarations. For instance, we exploit this to say that
+                    //
+                    //    namespace n
+                    //
+                    // can be none other than the beginning of a namespace declaration, but need to respect that JavaScript sees
+                    //
+                    //    namespace
+                    //    n
+                    //
+                    // as the identifier 'namespace' on one line followed by the identifier 'n' on another.
+                    // We need to look one token ahead to see if it permissible to try parsing a declaration.
+                    //
+                    // *Note*: 'interface' is actually a strict mode reserved word. So while
+                    //
+                    //   "use strict"
+                    //   interface
+                    //   I {}
+                    //
+                    // could be legal, it would add complexity for very little gain.
+                    case 107 /* InterfaceKeyword */:
+                    case 134 /* TypeKeyword */:
+                        return nextTokenIsIdentifierOnSameLine();
+                    case 125 /* ModuleKeyword */:
+                    case 126 /* NamespaceKeyword */:
+                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
+                    case 115 /* AbstractKeyword */:
+                    case 118 /* AsyncKeyword */:
+                    case 122 /* DeclareKeyword */:
+                    case 110 /* PrivateKeyword */:
+                    case 111 /* ProtectedKeyword */:
+                    case 112 /* PublicKeyword */:
+                    case 128 /* ReadonlyKeyword */:
+                        nextToken();
+                        // ASI takes effect for this modifier.
+                        if (scanner.hasPrecedingLineBreak()) {
+                            return false;
+                        }
+                        continue;
+                    case 137 /* GlobalKeyword */:
+                        nextToken();
+                        return token === 15 /* OpenBraceToken */ || token === 69 /* Identifier */ || token === 82 /* ExportKeyword */;
+                    case 89 /* ImportKeyword */:
+                        nextToken();
+                        return token === 9 /* StringLiteral */ || token === 37 /* AsteriskToken */ ||
+                            token === 15 /* OpenBraceToken */ || ts.tokenIsIdentifierOrKeyword(token);
+                    case 82 /* ExportKeyword */:
+                        nextToken();
+                        if (token === 56 /* EqualsToken */ || token === 37 /* AsteriskToken */ ||
+                            token === 15 /* OpenBraceToken */ || token === 77 /* DefaultKeyword */ ||
+                            token === 116 /* AsKeyword */) {
+                            return true;
+                        }
+                        continue;
+                    case 113 /* StaticKeyword */:
+                        nextToken();
+                        continue;
+                    default:
+                        return false;
+                }
+            }
+        }
+        function isStartOfDeclaration() {
+            return lookAhead(isDeclaration);
+        }
+        function isStartOfStatement() {
+            switch (token) {
+                case 55 /* AtToken */:
+                case 23 /* SemicolonToken */:
+                case 15 /* OpenBraceToken */:
+                case 102 /* VarKeyword */:
+                case 108 /* LetKeyword */:
+                case 87 /* FunctionKeyword */:
+                case 73 /* ClassKeyword */:
+                case 81 /* EnumKeyword */:
+                case 88 /* IfKeyword */:
+                case 79 /* DoKeyword */:
+                case 104 /* WhileKeyword */:
+                case 86 /* ForKeyword */:
+                case 75 /* ContinueKeyword */:
+                case 70 /* BreakKeyword */:
+                case 94 /* ReturnKeyword */:
+                case 105 /* WithKeyword */:
+                case 96 /* SwitchKeyword */:
+                case 98 /* ThrowKeyword */:
+                case 100 /* TryKeyword */:
+                case 76 /* DebuggerKeyword */:
+                // 'catch' and 'finally' do not actually indicate that the code is part of a statement,
+                // however, we say they are here so that we may gracefully parse them and error later.
+                case 72 /* CatchKeyword */:
+                case 85 /* FinallyKeyword */:
+                    return true;
+                case 74 /* ConstKeyword */:
+                case 82 /* ExportKeyword */:
+                case 89 /* ImportKeyword */:
+                    return isStartOfDeclaration();
+                case 118 /* AsyncKeyword */:
+                case 122 /* DeclareKeyword */:
+                case 107 /* InterfaceKeyword */:
+                case 125 /* ModuleKeyword */:
+                case 126 /* NamespaceKeyword */:
+                case 134 /* TypeKeyword */:
+                case 137 /* GlobalKeyword */:
+                    // When these don't start a declaration, they're an identifier in an expression statement
+                    return true;
+                case 112 /* PublicKeyword */:
+                case 110 /* PrivateKeyword */:
+                case 111 /* ProtectedKeyword */:
+                case 113 /* StaticKeyword */:
+                case 128 /* ReadonlyKeyword */:
+                    // When these don't start a declaration, they may be the start of a class member if an identifier
+                    // immediately follows. Otherwise they're an identifier in an expression statement.
+                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                default:
+                    return isStartOfExpression();
+            }
+        }
+        function nextTokenIsIdentifierOrStartOfDestructuring() {
+            nextToken();
+            return isIdentifier() || token === 15 /* OpenBraceToken */ || token === 19 /* OpenBracketToken */;
+        }
+        function isLetDeclaration() {
+            // In ES6 'let' always starts a lexical declaration if followed by an identifier or {
+            // or [.
+            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
+        }
+        function parseStatement() {
+            switch (token) {
+                case 23 /* SemicolonToken */:
+                    return parseEmptyStatement();
+                case 15 /* OpenBraceToken */:
+                    return parseBlock(/*ignoreMissingOpenBrace*/ false);
+                case 102 /* VarKeyword */:
+                    return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                case 108 /* LetKeyword */:
+                    if (isLetDeclaration()) {
+                        return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                    }
+                    break;
+                case 87 /* FunctionKeyword */:
+                    return parseFunctionDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                case 73 /* ClassKeyword */:
+                    return parseClassDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                case 88 /* IfKeyword */:
+                    return parseIfStatement();
+                case 79 /* DoKeyword */:
+                    return parseDoStatement();
+                case 104 /* WhileKeyword */:
+                    return parseWhileStatement();
+                case 86 /* ForKeyword */:
+                    return parseForOrForInOrForOfStatement();
+                case 75 /* ContinueKeyword */:
+                    return parseBreakOrContinueStatement(209 /* ContinueStatement */);
+                case 70 /* BreakKeyword */:
+                    return parseBreakOrContinueStatement(210 /* BreakStatement */);
+                case 94 /* ReturnKeyword */:
+                    return parseReturnStatement();
+                case 105 /* WithKeyword */:
+                    return parseWithStatement();
+                case 96 /* SwitchKeyword */:
+                    return parseSwitchStatement();
+                case 98 /* ThrowKeyword */:
+                    return parseThrowStatement();
+                case 100 /* TryKeyword */:
+                // Include 'catch' and 'finally' for error recovery.
+                case 72 /* CatchKeyword */:
+                case 85 /* FinallyKeyword */:
+                    return parseTryStatement();
+                case 76 /* DebuggerKeyword */:
+                    return parseDebuggerStatement();
+                case 55 /* AtToken */:
+                    return parseDeclaration();
+                case 118 /* AsyncKeyword */:
+                case 107 /* InterfaceKeyword */:
+                case 134 /* TypeKeyword */:
+                case 125 /* ModuleKeyword */:
+                case 126 /* NamespaceKeyword */:
+                case 122 /* DeclareKeyword */:
+                case 74 /* ConstKeyword */:
+                case 81 /* EnumKeyword */:
+                case 82 /* ExportKeyword */:
+                case 89 /* ImportKeyword */:
+                case 110 /* PrivateKeyword */:
+                case 111 /* ProtectedKeyword */:
+                case 112 /* PublicKeyword */:
+                case 115 /* AbstractKeyword */:
+                case 113 /* StaticKeyword */:
+                case 128 /* ReadonlyKeyword */:
+                case 137 /* GlobalKeyword */:
+                    if (isStartOfDeclaration()) {
+                        return parseDeclaration();
+                    }
+                    break;
+            }
+            return parseExpressionOrLabeledStatement();
+        }
+        function parseDeclaration() {
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            switch (token) {
+                case 102 /* VarKeyword */:
+                case 108 /* LetKeyword */:
+                case 74 /* ConstKeyword */:
+                    return parseVariableStatement(fullStart, decorators, modifiers);
+                case 87 /* FunctionKeyword */:
+                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
+                case 73 /* ClassKeyword */:
+                    return parseClassDeclaration(fullStart, decorators, modifiers);
+                case 107 /* InterfaceKeyword */:
+                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
+                case 134 /* TypeKeyword */:
+                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
+                case 81 /* EnumKeyword */:
+                    return parseEnumDeclaration(fullStart, decorators, modifiers);
+                case 137 /* GlobalKeyword */:
+                case 125 /* ModuleKeyword */:
+                case 126 /* NamespaceKeyword */:
+                    return parseModuleDeclaration(fullStart, decorators, modifiers);
+                case 89 /* ImportKeyword */:
+                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
+                case 82 /* ExportKeyword */:
+                    nextToken();
+                    switch (token) {
+                        case 77 /* DefaultKeyword */:
+                        case 56 /* EqualsToken */:
+                            return parseExportAssignment(fullStart, decorators, modifiers);
+                        case 116 /* AsKeyword */:
+                            return parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers);
+                        default:
+                            return parseExportDeclaration(fullStart, decorators, modifiers);
+                    }
+                default:
+                    if (decorators || modifiers) {
+                        // We reached this point because we encountered decorators and/or modifiers and assumed a declaration
+                        // would follow. For recovery and error reporting purposes, return an incomplete declaration.
+                        var node = createMissingNode(239 /* MissingDeclaration */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
+                        node.pos = fullStart;
+                        node.decorators = decorators;
+                        setModifiers(node, modifiers);
+                        return finishNode(node);
+                    }
+            }
+        }
+        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token === 9 /* StringLiteral */);
+        }
+        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
+            if (token !== 15 /* OpenBraceToken */ && canParseSemicolon()) {
+                parseSemicolon();
+                return;
+            }
+            return parseFunctionBlock(isGenerator, isAsync, /*ignoreMissingOpenBrace*/ false, diagnosticMessage);
+        }
+        // DECLARATIONS
+        function parseArrayBindingElement() {
+            if (token === 24 /* CommaToken */) {
+                return createNode(193 /* OmittedExpression */);
+            }
+            var node = createNode(169 /* BindingElement */);
+            node.dotDotDotToken = parseOptionalToken(22 /* DotDotDotToken */);
+            node.name = parseIdentifierOrPattern();
+            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
+            return finishNode(node);
+        }
+        function parseObjectBindingElement() {
+            var node = createNode(169 /* BindingElement */);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            if (tokenIsIdentifier && token !== 54 /* ColonToken */) {
+                node.name = propertyName;
+            }
+            else {
+                parseExpected(54 /* ColonToken */);
+                node.propertyName = propertyName;
+                node.name = parseIdentifierOrPattern();
+            }
+            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
+            return finishNode(node);
+        }
+        function parseObjectBindingPattern() {
+            var node = createNode(167 /* ObjectBindingPattern */);
+            parseExpected(15 /* OpenBraceToken */);
+            node.elements = parseDelimitedList(9 /* ObjectBindingElements */, parseObjectBindingElement);
+            parseExpected(16 /* CloseBraceToken */);
+            return finishNode(node);
+        }
+        function parseArrayBindingPattern() {
+            var node = createNode(168 /* ArrayBindingPattern */);
+            parseExpected(19 /* OpenBracketToken */);
+            node.elements = parseDelimitedList(10 /* ArrayBindingElements */, parseArrayBindingElement);
+            parseExpected(20 /* CloseBracketToken */);
+            return finishNode(node);
+        }
+        function isIdentifierOrPattern() {
+            return token === 15 /* OpenBraceToken */ || token === 19 /* OpenBracketToken */ || isIdentifier();
+        }
+        function parseIdentifierOrPattern() {
+            if (token === 19 /* OpenBracketToken */) {
+                return parseArrayBindingPattern();
+            }
+            if (token === 15 /* OpenBraceToken */) {
+                return parseObjectBindingPattern();
+            }
+            return parseIdentifier();
+        }
+        function parseVariableDeclaration() {
+            var node = createNode(218 /* VariableDeclaration */);
+            node.name = parseIdentifierOrPattern();
+            node.type = parseTypeAnnotation();
+            if (!isInOrOfKeyword(token)) {
+                node.initializer = parseInitializer(/*inParameter*/ false);
+            }
+            return finishNode(node);
+        }
+        function parseVariableDeclarationList(inForStatementInitializer) {
+            var node = createNode(219 /* VariableDeclarationList */);
+            switch (token) {
+                case 102 /* VarKeyword */:
+                    break;
+                case 108 /* LetKeyword */:
+                    node.flags |= 1024 /* Let */;
+                    break;
+                case 74 /* ConstKeyword */:
+                    node.flags |= 2048 /* Const */;
+                    break;
+                default:
+                    ts.Debug.fail();
+            }
+            nextToken();
+            // The user may have written the following:
+            //
+            //    for (let of X) { }
+            //
+            // In this case, we want to parse an empty declaration list, and then parse 'of'
+            // as a keyword. The reason this is not automatic is that 'of' is a valid identifier.
+            // So we need to look ahead to determine if 'of' should be treated as a keyword in
+            // this context.
+            // The checker will then give an error that there is an empty declaration list.
+            if (token === 138 /* OfKeyword */ && lookAhead(canFollowContextualOfKeyword)) {
+                node.declarations = createMissingList();
+            }
+            else {
+                var savedDisallowIn = inDisallowInContext();
+                setDisallowInContext(inForStatementInitializer);
+                node.declarations = parseDelimitedList(8 /* VariableDeclarations */, parseVariableDeclaration);
+                setDisallowInContext(savedDisallowIn);
+            }
+            return finishNode(node);
+        }
+        function canFollowContextualOfKeyword() {
+            return nextTokenIsIdentifier() && nextToken() === 18 /* CloseParenToken */;
+        }
+        function parseVariableStatement(fullStart, decorators, modifiers) {
+            var node = createNode(200 /* VariableStatement */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.declarationList = parseVariableDeclarationList(/*inForStatementInitializer*/ false);
+            parseSemicolon();
+            return addJSDocComment(finishNode(node));
+        }
+        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(220 /* FunctionDeclaration */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(87 /* FunctionKeyword */);
+            node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
+            node.name = node.flags & 512 /* Default */ ? parseOptionalIdentifier() : parseIdentifier();
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = !!(node.flags & 256 /* Async */);
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseConstructorDeclaration(pos, decorators, modifiers) {
+            var node = createNode(148 /* Constructor */, pos);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(121 /* ConstructorKeyword */);
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
+            var method = createNode(147 /* MethodDeclaration */, fullStart);
+            method.decorators = decorators;
+            setModifiers(method, modifiers);
+            method.asteriskToken = asteriskToken;
+            method.name = name;
+            method.questionToken = questionToken;
+            var isGenerator = !!asteriskToken;
+            var isAsync = !!(method.flags & 256 /* Async */);
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, method);
+            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
+            return addJSDocComment(finishNode(method));
+        }
+        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
+            var property = createNode(145 /* PropertyDeclaration */, fullStart);
+            property.decorators = decorators;
+            setModifiers(property, modifiers);
+            property.name = name;
+            property.questionToken = questionToken;
+            property.type = parseTypeAnnotation();
+            // For instance properties specifically, since they are evaluated inside the constructor,
+            // we do *not * want to parse yield expressions, so we specifically turn the yield context
+            // off. The grammar would look something like this:
+            //
+            //    MemberVariableDeclaration[Yield]:
+            //        AccessibilityModifier_opt   PropertyName   TypeAnnotation_opt   Initializer_opt[In];
+            //        AccessibilityModifier_opt  static_opt  PropertyName   TypeAnnotation_opt   Initializer_opt[In, ?Yield];
+            //
+            // The checker may still error in the static case to explicitly disallow the yield expression.
+            property.initializer = modifiers && modifiers.flags & 32 /* Static */
+                ? allowInAnd(parseNonParameterInitializer)
+                : doOutsideOfContext(8388608 /* YieldContext */ | 4194304 /* DisallowInContext */, parseNonParameterInitializer);
+            parseSemicolon();
+            return finishNode(property);
+        }
+        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
+            var asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
+            var name = parsePropertyName();
+            // Note: this is not legal as per the grammar.  But we allow it in the parser and
+            // report an error in the grammar checker.
+            var questionToken = parseOptionalToken(53 /* QuestionToken */);
+            if (asteriskToken || token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
+            }
+            else {
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
+            }
+        }
+        function parseNonParameterInitializer() {
+            return parseInitializer(/*inParameter*/ false);
+        }
+        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.name = parsePropertyName();
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false);
+            return finishNode(node);
+        }
+        function isClassMemberModifier(idToken) {
+            switch (idToken) {
+                case 112 /* PublicKeyword */:
+                case 110 /* PrivateKeyword */:
+                case 111 /* ProtectedKeyword */:
+                case 113 /* StaticKeyword */:
+                case 128 /* ReadonlyKeyword */:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isClassMemberStart() {
+            var idToken;
+            if (token === 55 /* AtToken */) {
+                return true;
+            }
+            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier.
+            while (ts.isModifierKind(token)) {
+                idToken = token;
+                // If the idToken is a class modifier (protected, private, public, and static), it is
+                // certain that we are starting to parse class member. This allows better error recovery
+                // Example:
+                //      public foo() ...     // true
+                //      public @dec blah ... // true; we will then report an error later
+                //      export public ...    // true; we will then report an error later
+                if (isClassMemberModifier(idToken)) {
+                    return true;
+                }
+                nextToken();
+            }
+            if (token === 37 /* AsteriskToken */) {
+                return true;
+            }
+            // Try to get the first property-like token following all modifiers.
+            // This can either be an identifier or the 'get' or 'set' keywords.
+            if (isLiteralPropertyName()) {
+                idToken = token;
+                nextToken();
+            }
+            // Index signatures and computed properties are class members; we can parse.
+            if (token === 19 /* OpenBracketToken */) {
+                return true;
+            }
+            // If we were able to get any potential identifier...
+            if (idToken !== undefined) {
+                // If we have a non-keyword identifier, or if we have an accessor, then it's safe to parse.
+                if (!ts.isKeyword(idToken) || idToken === 131 /* SetKeyword */ || idToken === 123 /* GetKeyword */) {
+                    return true;
+                }
+                // If it *is* a keyword, but not an accessor, check a little farther along
+                // to see if it should actually be parsed as a class member.
+                switch (token) {
+                    case 17 /* OpenParenToken */: // Method declaration
+                    case 25 /* LessThanToken */: // Generic Method declaration
+                    case 54 /* ColonToken */: // Type Annotation for declaration
+                    case 56 /* EqualsToken */: // Initializer for declaration
+                    case 53 /* QuestionToken */:
+                        return true;
+                    default:
+                        // Covers
+                        //  - Semicolons     (declaration termination)
+                        //  - Closing braces (end-of-class, must be declaration)
+                        //  - End-of-files   (not valid, but permitted so that it gets caught later on)
+                        //  - Line-breaks    (enabling *automatic semicolon insertion*)
+                        return canParseSemicolon();
+                }
+            }
+            return false;
+        }
+        function parseDecorators() {
+            var decorators;
+            while (true) {
+                var decoratorStart = getNodePos();
+                if (!parseOptional(55 /* AtToken */)) {
+                    break;
+                }
+                if (!decorators) {
+                    decorators = [];
+                    decorators.pos = decoratorStart;
+                }
+                var decorator = createNode(143 /* Decorator */, decoratorStart);
+                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
+                decorators.push(finishNode(decorator));
+            }
+            if (decorators) {
+                decorators.end = getNodeEnd();
+            }
+            return decorators;
+        }
+        /*
+         * There are situations in which a modifier like 'const' will appear unexpectedly, such as on a class member.
+         * In those situations, if we are entirely sure that 'const' is not valid on its own (such as when ASI takes effect
+         * and turns it into a standalone declaration), then it is better to parse it and report an error later.
+         *
+         * In such situations, 'permitInvalidConstAsModifier' should be set to true.
+         */
+        function parseModifiers(permitInvalidConstAsModifier) {
+            var flags = 0;
+            var modifiers;
+            while (true) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token;
+                if (token === 74 /* ConstKeyword */ && permitInvalidConstAsModifier) {
+                    // We need to ensure that any subsequent modifiers appear on the same line
+                    // so that when 'const' is a standalone declaration, we don't issue an error.
+                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
+                        break;
+                    }
+                }
+                else {
+                    if (!parseAnyContextualModifier()) {
+                        break;
+                    }
+                }
+                if (!modifiers) {
+                    modifiers = [];
+                    modifiers.pos = modifierStart;
+                }
+                flags |= ts.modifierToFlag(modifierKind);
+                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
+            }
+            if (modifiers) {
+                modifiers.flags = flags;
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
+        }
+        function parseModifiersForArrowFunction() {
+            var flags = 0;
+            var modifiers;
+            if (token === 118 /* AsyncKeyword */) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token;
+                nextToken();
+                modifiers = [];
+                modifiers.pos = modifierStart;
+                flags |= ts.modifierToFlag(modifierKind);
+                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
+                modifiers.flags = flags;
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
+        }
+        function parseClassElement() {
+            if (token === 23 /* SemicolonToken */) {
+                var result = createNode(198 /* SemicolonClassElement */);
+                nextToken();
+                return finishNode(result);
+            }
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers(/*permitInvalidConstAsModifier*/ true);
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
+            }
+            if (token === 121 /* ConstructorKeyword */) {
+                return parseConstructorDeclaration(fullStart, decorators, modifiers);
+            }
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
+            }
+            // It is very important that we check this *after* checking indexers because
+            // the [ token can start an index signature or a computed property name
+            if (ts.tokenIsIdentifierOrKeyword(token) ||
+                token === 9 /* StringLiteral */ ||
+                token === 8 /* NumericLiteral */ ||
+                token === 37 /* AsteriskToken */ ||
+                token === 19 /* OpenBracketToken */) {
+                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
+            }
+            if (decorators || modifiers) {
+                // treat this as a property declaration with a missing name.
+                var name_7 = createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_7, /*questionToken*/ undefined);
+            }
+            // 'isClassMemberStart' should have hinted not to attempt parsing.
+            ts.Debug.fail("Should not have attempted to parse class member declaration.");
+        }
+        function parseClassExpression() {
+            return parseClassDeclarationOrExpression(
+            /*fullStart*/ scanner.getStartPos(), 
+            /*decorators*/ undefined, 
+            /*modifiers*/ undefined, 192 /* ClassExpression */);
+        }
+        function parseClassDeclaration(fullStart, decorators, modifiers) {
+            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 221 /* ClassDeclaration */);
+        }
+        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(73 /* ClassKeyword */);
+            node.name = parseNameOfClassDeclarationOrExpression();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ true);
+            if (parseExpected(15 /* OpenBraceToken */)) {
+                // ClassTail[Yield,Await] : (Modified) See 14.5
+                //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
+                node.members = parseClassMembers();
+                parseExpected(16 /* CloseBraceToken */);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseNameOfClassDeclarationOrExpression() {
+            // implements is a future reserved word so
+            // 'class implements' might mean either
+            // - class expression with omitted name, 'implements' starts heritage clause
+            // - class with name 'implements'
+            // 'isImplementsClause' helps to disambiguate between these two cases
+            return isIdentifier() && !isImplementsClause()
+                ? parseIdentifier()
+                : undefined;
+        }
+        function isImplementsClause() {
+            return token === 106 /* ImplementsKeyword */ && lookAhead(nextTokenIsIdentifierOrKeyword);
+        }
+        function parseHeritageClauses(isClassHeritageClause) {
+            // ClassTail[Yield,Await] : (Modified) See 14.5
+            //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
+            if (isHeritageClause()) {
+                return parseList(20 /* HeritageClauses */, parseHeritageClause);
+            }
+            return undefined;
+        }
+        function parseHeritageClause() {
+            if (token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */) {
+                var node = createNode(251 /* HeritageClause */);
+                node.token = token;
+                nextToken();
+                node.types = parseDelimitedList(7 /* HeritageClauseElement */, parseExpressionWithTypeArguments);
+                return finishNode(node);
+            }
+            return undefined;
+        }
+        function parseExpressionWithTypeArguments() {
+            var node = createNode(194 /* ExpressionWithTypeArguments */);
+            node.expression = parseLeftHandSideExpressionOrHigher();
+            if (token === 25 /* LessThanToken */) {
+                node.typeArguments = parseBracketedList(18 /* TypeArguments */, parseType, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
+            }
+            return finishNode(node);
+        }
+        function isHeritageClause() {
+            return token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */;
+        }
+        function parseClassMembers() {
+            return parseList(5 /* ClassMembers */, parseClassElement);
+        }
+        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(222 /* InterfaceDeclaration */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(107 /* InterfaceKeyword */);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ false);
+            node.members = parseObjectTypeMembers();
+            return finishNode(node);
+        }
+        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(223 /* TypeAliasDeclaration */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(134 /* TypeKeyword */);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            parseExpected(56 /* EqualsToken */);
+            node.type = parseType();
+            parseSemicolon();
+            return finishNode(node);
+        }
+        // In an ambient declaration, the grammar only allows integer literals as initializers.
+        // In a non-ambient declaration, the grammar allows uninitialized members only in a
+        // ConstantEnumMemberSection, which starts at the beginning of an enum declaration
+        // or any time an integer literal initializer is encountered.
+        function parseEnumMember() {
+            var node = createNode(255 /* EnumMember */, scanner.getStartPos());
+            node.name = parsePropertyName();
+            node.initializer = allowInAnd(parseNonParameterInitializer);
+            return finishNode(node);
+        }
+        function parseEnumDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(224 /* EnumDeclaration */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(81 /* EnumKeyword */);
+            node.name = parseIdentifier();
+            if (parseExpected(15 /* OpenBraceToken */)) {
+                node.members = parseDelimitedList(6 /* EnumMembers */, parseEnumMember);
+                parseExpected(16 /* CloseBraceToken */);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseModuleBlock() {
+            var node = createNode(226 /* ModuleBlock */, scanner.getStartPos());
+            if (parseExpected(15 /* OpenBraceToken */)) {
+                node.statements = parseList(1 /* BlockStatements */, parseStatement);
+                parseExpected(16 /* CloseBraceToken */);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
+            var node = createNode(225 /* ModuleDeclaration */, fullStart);
+            // If we are parsing a dotted namespace name, we want to
+            // propagate the 'Namespace' flag across the names if set.
+            var namespaceFlag = flags & 4096 /* Namespace */;
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.flags |= flags;
+            node.name = parseIdentifier();
+            node.body = parseOptional(21 /* DotToken */)
+                ? parseModuleOrNamespaceDeclaration(getNodePos(), /*decorators*/ undefined, /*modifiers*/ undefined, 1 /* Export */ | namespaceFlag)
+                : parseModuleBlock();
+            return finishNode(node);
+        }
+        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(225 /* ModuleDeclaration */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (token === 137 /* GlobalKeyword */) {
+                // parse 'global' as name of global scope augmentation
+                node.name = parseIdentifier();
+                node.flags |= 131072 /* GlobalAugmentation */;
+            }
+            else {
+                node.name = parseLiteralNode(/*internName*/ true);
+            }
+            node.body = parseModuleBlock();
+            return finishNode(node);
+        }
+        function parseModuleDeclaration(fullStart, decorators, modifiers) {
+            var flags = modifiers ? modifiers.flags : 0;
+            if (token === 137 /* GlobalKeyword */) {
+                // global augmentation
+                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+            }
+            else if (parseOptional(126 /* NamespaceKeyword */)) {
+                flags |= 4096 /* Namespace */;
+            }
+            else {
+                parseExpected(125 /* ModuleKeyword */);
+                if (token === 9 /* StringLiteral */) {
+                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+                }
+            }
+            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
+        }
+        function isExternalModuleReference() {
+            return token === 129 /* RequireKeyword */ &&
+                lookAhead(nextTokenIsOpenParen);
+        }
+        function nextTokenIsOpenParen() {
+            return nextToken() === 17 /* OpenParenToken */;
+        }
+        function nextTokenIsSlash() {
+            return nextToken() === 39 /* SlashToken */;
+        }
+        function parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers) {
+            var exportDeclaration = createNode(228 /* NamespaceExportDeclaration */, fullStart);
+            exportDeclaration.decorators = decorators;
+            exportDeclaration.modifiers = modifiers;
+            parseExpected(116 /* AsKeyword */);
+            parseExpected(126 /* NamespaceKeyword */);
+            exportDeclaration.name = parseIdentifier();
+            parseExpected(23 /* SemicolonToken */);
+            return finishNode(exportDeclaration);
+        }
+        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
+            parseExpected(89 /* ImportKeyword */);
+            var afterImportPos = scanner.getStartPos();
+            var identifier;
+            if (isIdentifier()) {
+                identifier = parseIdentifier();
+                if (token !== 24 /* CommaToken */ && token !== 136 /* FromKeyword */) {
+                    // ImportEquals declaration of type:
+                    // import x = require("mod"); or
+                    // import x = M.x;
+                    var importEqualsDeclaration = createNode(229 /* ImportEqualsDeclaration */, fullStart);
+                    importEqualsDeclaration.decorators = decorators;
+                    setModifiers(importEqualsDeclaration, modifiers);
+                    importEqualsDeclaration.name = identifier;
+                    parseExpected(56 /* EqualsToken */);
+                    importEqualsDeclaration.moduleReference = parseModuleReference();
+                    parseSemicolon();
+                    return finishNode(importEqualsDeclaration);
+                }
+            }
+            // Import statement
+            var importDeclaration = createNode(230 /* ImportDeclaration */, fullStart);
+            importDeclaration.decorators = decorators;
+            setModifiers(importDeclaration, modifiers);
+            // ImportDeclaration:
+            //  import ImportClause from ModuleSpecifier ;
+            //  import ModuleSpecifier;
+            if (identifier ||
+                token === 37 /* AsteriskToken */ ||
+                token === 15 /* OpenBraceToken */) {
+                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
+                parseExpected(136 /* FromKeyword */);
+            }
+            importDeclaration.moduleSpecifier = parseModuleSpecifier();
+            parseSemicolon();
+            return finishNode(importDeclaration);
+        }
+        function parseImportClause(identifier, fullStart) {
+            // ImportClause:
+            //  ImportedDefaultBinding
+            //  NameSpaceImport
+            //  NamedImports
+            //  ImportedDefaultBinding, NameSpaceImport
+            //  ImportedDefaultBinding, NamedImports
+            var importClause = createNode(231 /* ImportClause */, fullStart);
+            if (identifier) {
+                // ImportedDefaultBinding:
+                //  ImportedBinding
+                importClause.name = identifier;
+            }
+            // If there was no default import or if there is comma token after default import
+            // parse namespace or named imports
+            if (!importClause.name ||
+                parseOptional(24 /* CommaToken */)) {
+                importClause.namedBindings = token === 37 /* AsteriskToken */ ? parseNamespaceImport() : parseNamedImportsOrExports(233 /* NamedImports */);
+            }
+            return finishNode(importClause);
+        }
+        function parseModuleReference() {
+            return isExternalModuleReference()
+                ? parseExternalModuleReference()
+                : parseEntityName(/*allowReservedWords*/ false);
+        }
+        function parseExternalModuleReference() {
+            var node = createNode(240 /* ExternalModuleReference */);
+            parseExpected(129 /* RequireKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = parseModuleSpecifier();
+            parseExpected(18 /* CloseParenToken */);
+            return finishNode(node);
+        }
+        function parseModuleSpecifier() {
+            if (token === 9 /* StringLiteral */) {
+                var result = parseLiteralNode();
+                internIdentifier(result.text);
+                return result;
+            }
+            else {
+                // We allow arbitrary expressions here, even though the grammar only allows string
+                // literals.  We check to ensure that it is only a string literal later in the grammar
+                // check pass.
+                return parseExpression();
+            }
+        }
+        function parseNamespaceImport() {
+            // NameSpaceImport:
+            //  * as ImportedBinding
+            var namespaceImport = createNode(232 /* NamespaceImport */);
+            parseExpected(37 /* AsteriskToken */);
+            parseExpected(116 /* AsKeyword */);
+            namespaceImport.name = parseIdentifier();
+            return finishNode(namespaceImport);
+        }
+        function parseNamedImportsOrExports(kind) {
+            var node = createNode(kind);
+            // NamedImports:
+            //  { }
+            //  { ImportsList }
+            //  { ImportsList, }
+            // ImportsList:
+            //  ImportSpecifier
+            //  ImportsList, ImportSpecifier
+            node.elements = parseBracketedList(21 /* ImportOrExportSpecifiers */, kind === 233 /* NamedImports */ ? parseImportSpecifier : parseExportSpecifier, 15 /* OpenBraceToken */, 16 /* CloseBraceToken */);
+            return finishNode(node);
+        }
+        function parseExportSpecifier() {
+            return parseImportOrExportSpecifier(238 /* ExportSpecifier */);
+        }
+        function parseImportSpecifier() {
+            return parseImportOrExportSpecifier(234 /* ImportSpecifier */);
+        }
+        function parseImportOrExportSpecifier(kind) {
+            var node = createNode(kind);
+            // ImportSpecifier:
+            //   BindingIdentifier
+            //   IdentifierName as BindingIdentifier
+            // ExportSpecifier:
+            //   IdentifierName
+            //   IdentifierName as IdentifierName
+            var checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
+            var checkIdentifierStart = scanner.getTokenPos();
+            var checkIdentifierEnd = scanner.getTextPos();
+            var identifierName = parseIdentifierName();
+            if (token === 116 /* AsKeyword */) {
+                node.propertyName = identifierName;
+                parseExpected(116 /* AsKeyword */);
+                checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
+                checkIdentifierStart = scanner.getTokenPos();
+                checkIdentifierEnd = scanner.getTextPos();
+                node.name = parseIdentifierName();
+            }
+            else {
+                node.name = identifierName;
+            }
+            if (kind === 234 /* ImportSpecifier */ && checkIdentifierIsKeyword) {
+                // Report error identifier expected
+                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
+            }
+            return finishNode(node);
+        }
+        function parseExportDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(236 /* ExportDeclaration */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (parseOptional(37 /* AsteriskToken */)) {
+                parseExpected(136 /* FromKeyword */);
+                node.moduleSpecifier = parseModuleSpecifier();
+            }
+            else {
+                node.exportClause = parseNamedImportsOrExports(237 /* NamedExports */);
+                // It is not uncommon to accidentally omit the 'from' keyword. Additionally, in editing scenarios,
+                // the 'from' keyword can be parsed as a named export when the export clause is unterminated (i.e. `export { from "moduleName";`)
+                // If we don't have a 'from' keyword, see if we have a string literal such that ASI won't take effect.
+                if (token === 136 /* FromKeyword */ || (token === 9 /* StringLiteral */ && !scanner.hasPrecedingLineBreak())) {
+                    parseExpected(136 /* FromKeyword */);
+                    node.moduleSpecifier = parseModuleSpecifier();
+                }
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseExportAssignment(fullStart, decorators, modifiers) {
+            var node = createNode(235 /* ExportAssignment */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (parseOptional(56 /* EqualsToken */)) {
+                node.isExportEquals = true;
+            }
+            else {
+                parseExpected(77 /* DefaultKeyword */);
+            }
+            node.expression = parseAssignmentExpressionOrHigher();
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function processReferenceComments(sourceFile) {
+            var triviaScanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ false, 0 /* Standard */, sourceText);
+            var referencedFiles = [];
+            var typeReferenceDirectives = [];
+            var amdDependencies = [];
+            var amdModuleName;
+            // Keep scanning all the leading trivia in the file until we get to something that
+            // isn't trivia.  Any single line comment will be analyzed to see if it is a
+            // reference comment.
+            while (true) {
+                var kind = triviaScanner.scan();
+                if (kind !== 2 /* SingleLineCommentTrivia */) {
+                    if (ts.isTrivia(kind)) {
+                        continue;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                var range = { pos: triviaScanner.getTokenPos(), end: triviaScanner.getTextPos(), kind: triviaScanner.getToken() };
+                var comment = sourceText.substring(range.pos, range.end);
+                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
+                if (referencePathMatchResult) {
+                    var fileReference = referencePathMatchResult.fileReference;
+                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
+                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
+                    if (fileReference) {
+                        if (referencePathMatchResult.isTypeReferenceDirective) {
+                            typeReferenceDirectives.push(fileReference);
+                        }
+                        else {
+                            referencedFiles.push(fileReference);
+                        }
+                    }
+                    if (diagnosticMessage) {
+                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
+                    }
+                }
+                else {
+                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
+                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
+                    if (amdModuleNameMatchResult) {
+                        if (amdModuleName) {
+                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
+                        }
+                        amdModuleName = amdModuleNameMatchResult[2];
+                    }
+                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
+                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
+                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
+                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
+                    if (amdDependencyMatchResult) {
+                        var pathMatchResult = pathRegex.exec(comment);
+                        var nameMatchResult = nameRegex.exec(comment);
+                        if (pathMatchResult) {
+                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
+                            amdDependencies.push(amdDependency);
+                        }
+                    }
+                }
+            }
+            sourceFile.referencedFiles = referencedFiles;
+            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
+            sourceFile.amdDependencies = amdDependencies;
+            sourceFile.moduleName = amdModuleName;
+        }
+        function setExternalModuleIndicator(sourceFile) {
+            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
+                return node.flags & 1 /* Export */
+                    || node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 240 /* ExternalModuleReference */
+                    || node.kind === 230 /* ImportDeclaration */
+                    || node.kind === 235 /* ExportAssignment */
+                    || node.kind === 236 /* ExportDeclaration */
+                    ? node
+                    : undefined;
+            });
+        }
+        var ParsingContext;
+        (function (ParsingContext) {
+            ParsingContext[ParsingContext["SourceElements"] = 0] = "SourceElements";
+            ParsingContext[ParsingContext["BlockStatements"] = 1] = "BlockStatements";
+            ParsingContext[ParsingContext["SwitchClauses"] = 2] = "SwitchClauses";
+            ParsingContext[ParsingContext["SwitchClauseStatements"] = 3] = "SwitchClauseStatements";
+            ParsingContext[ParsingContext["TypeMembers"] = 4] = "TypeMembers";
+            ParsingContext[ParsingContext["ClassMembers"] = 5] = "ClassMembers";
+            ParsingContext[ParsingContext["EnumMembers"] = 6] = "EnumMembers";
+            ParsingContext[ParsingContext["HeritageClauseElement"] = 7] = "HeritageClauseElement";
+            ParsingContext[ParsingContext["VariableDeclarations"] = 8] = "VariableDeclarations";
+            ParsingContext[ParsingContext["ObjectBindingElements"] = 9] = "ObjectBindingElements";
+            ParsingContext[ParsingContext["ArrayBindingElements"] = 10] = "ArrayBindingElements";
+            ParsingContext[ParsingContext["ArgumentExpressions"] = 11] = "ArgumentExpressions";
+            ParsingContext[ParsingContext["ObjectLiteralMembers"] = 12] = "ObjectLiteralMembers";
+            ParsingContext[ParsingContext["JsxAttributes"] = 13] = "JsxAttributes";
+            ParsingContext[ParsingContext["JsxChildren"] = 14] = "JsxChildren";
+            ParsingContext[ParsingContext["ArrayLiteralMembers"] = 15] = "ArrayLiteralMembers";
+            ParsingContext[ParsingContext["Parameters"] = 16] = "Parameters";
+            ParsingContext[ParsingContext["TypeParameters"] = 17] = "TypeParameters";
+            ParsingContext[ParsingContext["TypeArguments"] = 18] = "TypeArguments";
+            ParsingContext[ParsingContext["TupleElementTypes"] = 19] = "TupleElementTypes";
+            ParsingContext[ParsingContext["HeritageClauses"] = 20] = "HeritageClauses";
+            ParsingContext[ParsingContext["ImportOrExportSpecifiers"] = 21] = "ImportOrExportSpecifiers";
+            ParsingContext[ParsingContext["JSDocFunctionParameters"] = 22] = "JSDocFunctionParameters";
+            ParsingContext[ParsingContext["JSDocTypeArguments"] = 23] = "JSDocTypeArguments";
+            ParsingContext[ParsingContext["JSDocRecordMembers"] = 24] = "JSDocRecordMembers";
+            ParsingContext[ParsingContext["JSDocTupleTypes"] = 25] = "JSDocTupleTypes";
+            ParsingContext[ParsingContext["Count"] = 26] = "Count"; // Number of parsing contexts
+        })(ParsingContext || (ParsingContext = {}));
+        var Tristate;
+        (function (Tristate) {
+            Tristate[Tristate["False"] = 0] = "False";
+            Tristate[Tristate["True"] = 1] = "True";
+            Tristate[Tristate["Unknown"] = 2] = "Unknown";
+        })(Tristate || (Tristate = {}));
+        var JSDocParser;
+        (function (JSDocParser) {
+            function isJSDocType() {
+                switch (token) {
+                    case 37 /* AsteriskToken */:
+                    case 53 /* QuestionToken */:
+                    case 17 /* OpenParenToken */:
+                    case 19 /* OpenBracketToken */:
+                    case 49 /* ExclamationToken */:
+                    case 15 /* OpenBraceToken */:
+                    case 87 /* FunctionKeyword */:
+                    case 22 /* DotDotDotToken */:
+                    case 92 /* NewKeyword */:
+                    case 97 /* ThisKeyword */:
+                        return true;
+                }
+                return ts.tokenIsIdentifierOrKeyword(token);
+            }
+            JSDocParser.isJSDocType = isJSDocType;
+            function parseJSDocTypeExpressionForTests(content, start, length) {
+                initializeState("file.js", content, 2 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
+                scanner.setText(content, start, length);
+                token = scanner.scan();
+                var jsDocTypeExpression = parseJSDocTypeExpression();
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+            // Parses out a JSDoc type expression.
+            /* @internal */
+            function parseJSDocTypeExpression() {
+                var result = createNode(257 /* JSDocTypeExpression */, scanner.getTokenPos());
+                parseExpected(15 /* OpenBraceToken */);
+                result.type = parseJSDocTopLevelType();
+                parseExpected(16 /* CloseBraceToken */);
+                fixupParentReferences(result);
+                return finishNode(result);
+            }
+            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
+            function parseJSDocTopLevelType() {
+                var type = parseJSDocType();
+                if (token === 47 /* BarToken */) {
+                    var unionType = createNode(261 /* JSDocUnionType */, type.pos);
+                    unionType.types = parseJSDocTypeList(type);
+                    type = finishNode(unionType);
+                }
+                if (token === 56 /* EqualsToken */) {
+                    var optionalType = createNode(268 /* JSDocOptionalType */, type.pos);
+                    nextToken();
+                    optionalType.type = type;
+                    type = finishNode(optionalType);
+                }
+                return type;
+            }
+            function parseJSDocType() {
+                var type = parseBasicTypeExpression();
+                while (true) {
+                    if (token === 19 /* OpenBracketToken */) {
+                        var arrayType = createNode(260 /* JSDocArrayType */, type.pos);
+                        arrayType.elementType = type;
+                        nextToken();
+                        parseExpected(20 /* CloseBracketToken */);
+                        type = finishNode(arrayType);
+                    }
+                    else if (token === 53 /* QuestionToken */) {
+                        var nullableType = createNode(263 /* JSDocNullableType */, type.pos);
+                        nullableType.type = type;
+                        nextToken();
+                        type = finishNode(nullableType);
+                    }
+                    else if (token === 49 /* ExclamationToken */) {
+                        var nonNullableType = createNode(264 /* JSDocNonNullableType */, type.pos);
+                        nonNullableType.type = type;
+                        nextToken();
+                        type = finishNode(nonNullableType);
+                    }
+                    else {
+                        break;
+                    }
+                }
+                return type;
+            }
+            function parseBasicTypeExpression() {
+                switch (token) {
+                    case 37 /* AsteriskToken */:
+                        return parseJSDocAllType();
+                    case 53 /* QuestionToken */:
+                        return parseJSDocUnknownOrNullableType();
+                    case 17 /* OpenParenToken */:
+                        return parseJSDocUnionType();
+                    case 19 /* OpenBracketToken */:
+                        return parseJSDocTupleType();
+                    case 49 /* ExclamationToken */:
+                        return parseJSDocNonNullableType();
+                    case 15 /* OpenBraceToken */:
+                        return parseJSDocRecordType();
+                    case 87 /* FunctionKeyword */:
+                        return parseJSDocFunctionType();
+                    case 22 /* DotDotDotToken */:
+                        return parseJSDocVariadicType();
+                    case 92 /* NewKeyword */:
+                        return parseJSDocConstructorType();
+                    case 97 /* ThisKeyword */:
+                        return parseJSDocThisType();
+                    case 117 /* AnyKeyword */:
+                    case 132 /* StringKeyword */:
+                    case 130 /* NumberKeyword */:
+                    case 120 /* BooleanKeyword */:
+                    case 133 /* SymbolKeyword */:
+                    case 103 /* VoidKeyword */:
+                        return parseTokenNode();
+                }
+                // TODO (drosen): Parse string literal types in JSDoc as well.
+                return parseJSDocTypeReference();
+            }
+            function parseJSDocThisType() {
+                var result = createNode(272 /* JSDocThisType */);
+                nextToken();
+                parseExpected(54 /* ColonToken */);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocConstructorType() {
+                var result = createNode(271 /* JSDocConstructorType */);
+                nextToken();
+                parseExpected(54 /* ColonToken */);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocVariadicType() {
+                var result = createNode(270 /* JSDocVariadicType */);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocFunctionType() {
+                var result = createNode(269 /* JSDocFunctionType */);
+                nextToken();
+                parseExpected(17 /* OpenParenToken */);
+                result.parameters = parseDelimitedList(22 /* JSDocFunctionParameters */, parseJSDocParameter);
+                checkForTrailingComma(result.parameters);
+                parseExpected(18 /* CloseParenToken */);
+                if (token === 54 /* ColonToken */) {
+                    nextToken();
+                    result.type = parseJSDocType();
+                }
+                return finishNode(result);
+            }
+            function parseJSDocParameter() {
+                var parameter = createNode(142 /* Parameter */);
+                parameter.type = parseJSDocType();
+                if (parseOptional(56 /* EqualsToken */)) {
+                    parameter.questionToken = createNode(56 /* EqualsToken */);
+                }
+                return finishNode(parameter);
+            }
+            function parseJSDocTypeReference() {
+                var result = createNode(267 /* JSDocTypeReference */);
+                result.name = parseSimplePropertyName();
+                if (token === 25 /* LessThanToken */) {
+                    result.typeArguments = parseTypeArguments();
+                }
+                else {
+                    while (parseOptional(21 /* DotToken */)) {
+                        if (token === 25 /* LessThanToken */) {
+                            result.typeArguments = parseTypeArguments();
+                            break;
+                        }
+                        else {
+                            result.name = parseQualifiedName(result.name);
+                        }
+                    }
+                }
+                return finishNode(result);
+            }
+            function parseTypeArguments() {
+                // Move past the <
+                nextToken();
+                var typeArguments = parseDelimitedList(23 /* JSDocTypeArguments */, parseJSDocType);
+                checkForTrailingComma(typeArguments);
+                checkForEmptyTypeArgumentList(typeArguments);
+                parseExpected(27 /* GreaterThanToken */);
+                return typeArguments;
+            }
+            function checkForEmptyTypeArgumentList(typeArguments) {
+                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
+                    var start = typeArguments.pos - "<".length;
+                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
+                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+                }
+            }
+            function parseQualifiedName(left) {
+                var result = createNode(139 /* QualifiedName */, left.pos);
+                result.left = left;
+                result.right = parseIdentifierName();
+                return finishNode(result);
+            }
+            function parseJSDocRecordType() {
+                var result = createNode(265 /* JSDocRecordType */);
+                nextToken();
+                result.members = parseDelimitedList(24 /* JSDocRecordMembers */, parseJSDocRecordMember);
+                checkForTrailingComma(result.members);
+                parseExpected(16 /* CloseBraceToken */);
+                return finishNode(result);
+            }
+            function parseJSDocRecordMember() {
+                var result = createNode(266 /* JSDocRecordMember */);
+                result.name = parseSimplePropertyName();
+                if (token === 54 /* ColonToken */) {
+                    nextToken();
+                    result.type = parseJSDocType();
+                }
+                return finishNode(result);
+            }
+            function parseJSDocNonNullableType() {
+                var result = createNode(264 /* JSDocNonNullableType */);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocTupleType() {
+                var result = createNode(262 /* JSDocTupleType */);
+                nextToken();
+                result.types = parseDelimitedList(25 /* JSDocTupleTypes */, parseJSDocType);
+                checkForTrailingComma(result.types);
+                parseExpected(20 /* CloseBracketToken */);
+                return finishNode(result);
+            }
+            function checkForTrailingComma(list) {
+                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
+                    var start = list.end - ",".length;
+                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
+                }
+            }
+            function parseJSDocUnionType() {
+                var result = createNode(261 /* JSDocUnionType */);
+                nextToken();
+                result.types = parseJSDocTypeList(parseJSDocType());
+                parseExpected(18 /* CloseParenToken */);
+                return finishNode(result);
+            }
+            function parseJSDocTypeList(firstType) {
+                ts.Debug.assert(!!firstType);
+                var types = [];
+                types.pos = firstType.pos;
+                types.push(firstType);
+                while (parseOptional(47 /* BarToken */)) {
+                    types.push(parseJSDocType());
+                }
+                types.end = scanner.getStartPos();
+                return types;
+            }
+            function parseJSDocAllType() {
+                var result = createNode(258 /* JSDocAllType */);
+                nextToken();
+                return finishNode(result);
+            }
+            function parseJSDocUnknownOrNullableType() {
+                var pos = scanner.getStartPos();
+                // skip the ?
+                nextToken();
+                // Need to lookahead to decide if this is a nullable or unknown type.
+                // Here are cases where we'll pick the unknown type:
+                //
+                //      Foo(?,
+                //      { a: ? }
+                //      Foo(?)
+                //      Foo<?>
+                //      Foo(?=
+                //      (?|
+                if (token === 24 /* CommaToken */ ||
+                    token === 16 /* CloseBraceToken */ ||
+                    token === 18 /* CloseParenToken */ ||
+                    token === 27 /* GreaterThanToken */ ||
+                    token === 56 /* EqualsToken */ ||
+                    token === 47 /* BarToken */) {
+                    var result = createNode(259 /* JSDocUnknownType */, pos);
+                    return finishNode(result);
+                }
+                else {
+                    var result = createNode(263 /* JSDocNullableType */, pos);
+                    result.type = parseJSDocType();
+                    return finishNode(result);
+                }
+            }
+            function parseIsolatedJSDocComment(content, start, length) {
+                initializeState("file.js", content, 2 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
+                sourceFile = { languageVariant: 0 /* Standard */, text: content };
+                var jsDocComment = parseJSDocCommentWorker(start, length);
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDocComment ? { jsDocComment: jsDocComment, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+            function parseJSDocComment(parent, start, length) {
+                var saveToken = token;
+                var saveParseDiagnosticsLength = parseDiagnostics.length;
+                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+                var comment = parseJSDocCommentWorker(start, length);
+                if (comment) {
+                    comment.parent = parent;
+                }
+                token = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+                return comment;
+            }
+            JSDocParser.parseJSDocComment = parseJSDocComment;
+            function parseJSDocCommentWorker(start, length) {
+                var content = sourceText;
+                start = start || 0;
+                var end = length === undefined ? content.length : start + length;
+                length = end - start;
+                ts.Debug.assert(start >= 0);
+                ts.Debug.assert(start <= end);
+                ts.Debug.assert(end <= content.length);
+                var tags;
+                var result;
+                // Check for /** (JSDoc opening part)
+                if (content.charCodeAt(start) === 47 /* slash */ &&
+                    content.charCodeAt(start + 1) === 42 /* asterisk */ &&
+                    content.charCodeAt(start + 2) === 42 /* asterisk */ &&
+                    content.charCodeAt(start + 3) !== 42 /* asterisk */) {
+                    // + 3 for leading /**, - 5 in total for /** */
+                    scanner.scanRange(start + 3, length - 5, function () {
+                        // Initially we can parse out a tag.  We also have seen a starting asterisk.
+                        // This is so that /** * @type */ doesn't parse.
+                        var canParseTag = true;
+                        var seenAsterisk = true;
+                        nextJSDocToken();
+                        while (token !== 1 /* EndOfFileToken */) {
+                            switch (token) {
+                                case 55 /* AtToken */:
+                                    if (canParseTag) {
+                                        parseTag();
+                                    }
+                                    // This will take us to the end of the line, so it's OK to parse a tag on the next pass through the loop
+                                    seenAsterisk = false;
+                                    break;
+                                case 4 /* NewLineTrivia */:
+                                    // After a line break, we can parse a tag, and we haven't seen an asterisk on the next line yet
+                                    canParseTag = true;
+                                    seenAsterisk = false;
+                                    break;
+                                case 37 /* AsteriskToken */:
+                                    if (seenAsterisk) {
+                                        // If we've already seen an asterisk, then we can no longer parse a tag on this line
+                                        canParseTag = false;
+                                    }
+                                    // Ignore the first asterisk on a line
+                                    seenAsterisk = true;
+                                    break;
+                                case 69 /* Identifier */:
+                                    // Anything else is doc comment text.  We can't do anything with it.  Because it
+                                    // wasn't a tag, we can no longer parse a tag on this line until we hit the next
+                                    // line break.
+                                    canParseTag = false;
+                                    break;
+                                case 1 /* EndOfFileToken */:
+                                    break;
+                            }
+                            nextJSDocToken();
+                        }
+                        result = createJSDocComment();
+                    });
+                }
+                return result;
+                function createJSDocComment() {
+                    if (!tags) {
+                        return undefined;
+                    }
+                    var result = createNode(273 /* JSDocComment */, start);
+                    result.tags = tags;
+                    return finishNode(result, end);
+                }
+                function skipWhitespace() {
+                    while (token === 5 /* WhitespaceTrivia */ || token === 4 /* NewLineTrivia */) {
+                        nextJSDocToken();
+                    }
+                }
+                function parseTag() {
+                    ts.Debug.assert(token === 55 /* AtToken */);
+                    var atToken = createNode(55 /* AtToken */, scanner.getTokenPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    if (!tagName) {
+                        return;
+                    }
+                    var tag = handleTag(atToken, tagName) || handleUnknownTag(atToken, tagName);
+                    addTag(tag);
+                }
+                function handleTag(atToken, tagName) {
+                    if (tagName) {
+                        switch (tagName.text) {
+                            case "param":
+                                return handleParamTag(atToken, tagName);
+                            case "return":
+                            case "returns":
+                                return handleReturnTag(atToken, tagName);
+                            case "template":
+                                return handleTemplateTag(atToken, tagName);
+                            case "type":
+                                return handleTypeTag(atToken, tagName);
+                            case "typedef":
+                                return handleTypedefTag(atToken, tagName);
+                        }
+                    }
+                    return undefined;
+                }
+                function handleUnknownTag(atToken, tagName) {
+                    var result = createNode(274 /* JSDocTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    return finishNode(result);
+                }
+                function addTag(tag) {
+                    if (tag) {
+                        if (!tags) {
+                            tags = [];
+                            tags.pos = tag.pos;
+                        }
+                        tags.push(tag);
+                        tags.end = tag.end;
+                    }
+                }
+                function tryParseTypeExpression() {
+                    if (token !== 15 /* OpenBraceToken */) {
+                        return undefined;
+                    }
+                    var typeExpression = parseJSDocTypeExpression();
+                    return typeExpression;
+                }
+                function handleParamTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var name;
+                    var isBracketed;
+                    // Looking for something like '[foo]' or 'foo'
+                    if (parseOptionalToken(19 /* OpenBracketToken */)) {
+                        name = parseJSDocIdentifierName();
+                        isBracketed = true;
+                        // May have an optional default, e.g. '[foo = 42]'
+                        if (parseOptionalToken(56 /* EqualsToken */)) {
+                            parseExpression();
+                        }
+                        parseExpected(20 /* CloseBracketToken */);
+                    }
+                    else if (ts.tokenIsIdentifierOrKeyword(token)) {
+                        name = parseJSDocIdentifierName();
+                    }
+                    if (!name) {
+                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var preName, postName;
+                    if (typeExpression) {
+                        postName = name;
+                    }
+                    else {
+                        preName = name;
+                    }
+                    if (!typeExpression) {
+                        typeExpression = tryParseTypeExpression();
+                    }
+                    var result = createNode(275 /* JSDocParameterTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.preParameterName = preName;
+                    result.typeExpression = typeExpression;
+                    result.postParameterName = postName;
+                    result.isBracketed = isBracketed;
+                    return finishNode(result);
+                }
+                function handleReturnTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 276 /* JSDocReturnTag */; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(276 /* JSDocReturnTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function handleTypeTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 277 /* JSDocTypeTag */; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(277 /* JSDocTypeTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function handlePropertyTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var name = parseJSDocIdentifierName();
+                    if (!name) {
+                        parseErrorAtPosition(scanner.getStartPos(), /*length*/ 0, ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var result = createNode(280 /* JSDocPropertyTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.name = name;
+                    result.typeExpression = typeExpression;
+                    return finishNode(result);
+                }
+                function handleTypedefTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var typedefTag = createNode(279 /* JSDocTypedefTag */, atToken.pos);
+                    typedefTag.atToken = atToken;
+                    typedefTag.tagName = tagName;
+                    typedefTag.name = parseJSDocIdentifierName();
+                    typedefTag.typeExpression = typeExpression;
+                    if (typeExpression) {
+                        if (typeExpression.type.kind === 267 /* JSDocTypeReference */) {
+                            var jsDocTypeReference = typeExpression.type;
+                            if (jsDocTypeReference.name.kind === 69 /* Identifier */) {
+                                var name_8 = jsDocTypeReference.name;
+                                if (name_8.text === "Object") {
+                                    typedefTag.jsDocTypeLiteral = scanChildTags();
+                                }
+                            }
+                        }
+                        if (!typedefTag.jsDocTypeLiteral) {
+                            typedefTag.jsDocTypeLiteral = typeExpression.type;
+                        }
+                    }
+                    else {
+                        typedefTag.jsDocTypeLiteral = scanChildTags();
+                    }
+                    return finishNode(typedefTag);
+                    function scanChildTags() {
+                        var jsDocTypeLiteral = createNode(281 /* JSDocTypeLiteral */, scanner.getStartPos());
+                        var resumePos = scanner.getStartPos();
+                        var canParseTag = true;
+                        var seenAsterisk = false;
+                        var parentTagTerminated = false;
+                        while (token !== 1 /* EndOfFileToken */ && !parentTagTerminated) {
+                            nextJSDocToken();
+                            switch (token) {
+                                case 55 /* AtToken */:
+                                    if (canParseTag) {
+                                        parentTagTerminated = !tryParseChildTag(jsDocTypeLiteral);
+                                    }
+                                    seenAsterisk = false;
+                                    break;
+                                case 4 /* NewLineTrivia */:
+                                    resumePos = scanner.getStartPos() - 1;
+                                    canParseTag = true;
+                                    seenAsterisk = false;
+                                    break;
+                                case 37 /* AsteriskToken */:
+                                    if (seenAsterisk) {
+                                        canParseTag = false;
+                                    }
+                                    seenAsterisk = true;
+                                    break;
+                                case 69 /* Identifier */:
+                                    canParseTag = false;
+                                case 1 /* EndOfFileToken */:
+                                    break;
+                            }
+                        }
+                        scanner.setTextPos(resumePos);
+                        return finishNode(jsDocTypeLiteral);
+                    }
+                }
+                function tryParseChildTag(parentTag) {
+                    ts.Debug.assert(token === 55 /* AtToken */);
+                    var atToken = createNode(55 /* AtToken */, scanner.getStartPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    if (!tagName) {
+                        return false;
+                    }
+                    switch (tagName.text) {
+                        case "type":
+                            if (parentTag.jsDocTypeTag) {
+                                // already has a @type tag, terminate the parent tag now.
+                                return false;
+                            }
+                            parentTag.jsDocTypeTag = handleTypeTag(atToken, tagName);
+                            return true;
+                        case "prop":
+                        case "property":
+                            if (!parentTag.jsDocPropertyTags) {
+                                parentTag.jsDocPropertyTags = [];
+                            }
+                            var propertyTag = handlePropertyTag(atToken, tagName);
+                            parentTag.jsDocPropertyTags.push(propertyTag);
+                            return true;
+                    }
+                    return false;
+                }
+                function handleTemplateTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 278 /* JSDocTemplateTag */; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    // Type parameter list looks like '@template T,U,V'
+                    var typeParameters = [];
+                    typeParameters.pos = scanner.getStartPos();
+                    while (true) {
+                        var name_9 = parseJSDocIdentifierName();
+                        if (!name_9) {
+                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                            return undefined;
+                        }
+                        var typeParameter = createNode(141 /* TypeParameter */, name_9.pos);
+                        typeParameter.name = name_9;
+                        finishNode(typeParameter);
+                        typeParameters.push(typeParameter);
+                        if (token === 24 /* CommaToken */) {
+                            nextJSDocToken();
+                        }
+                        else {
+                            break;
+                        }
+                    }
+                    var result = createNode(278 /* JSDocTemplateTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeParameters = typeParameters;
+                    finishNode(result);
+                    typeParameters.end = result.end;
+                    return result;
+                }
+                function nextJSDocToken() {
+                    return token = scanner.scanJSDocToken();
+                }
+                function parseJSDocIdentifierName() {
+                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token));
+                }
+                function createJSDocIdentifier(isIdentifier) {
+                    if (!isIdentifier) {
+                        parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var pos = scanner.getTokenPos();
+                    var end = scanner.getTextPos();
+                    var result = createNode(69 /* Identifier */, pos);
+                    result.text = content.substring(pos, end);
+                    finishNode(result, end);
+                    nextJSDocToken();
+                    return result;
+                }
+            }
+            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
+        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
+    })(Parser || (Parser = {}));
+    var IncrementalParser;
+    (function (IncrementalParser) {
+        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2 /* Aggressive */);
+            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
+            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
+                // if the text didn't change, then we can just return our current source file as-is.
+                return sourceFile;
+            }
+            if (sourceFile.statements.length === 0) {
+                // If we don't have any statements in the current source file, then there's no real
+                // way to incrementally parse.  So just do a full parse instead.
+                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, /*syntaxCursor*/ undefined, /*setParentNodes*/ true, sourceFile.scriptKind);
+            }
+            // Make sure we're not trying to incrementally update a source file more than once.  Once
+            // we do an update the original source file is considered unusable from that point onwards.
+            //
+            // This is because we do incremental parsing in-place.  i.e. we take nodes from the old
+            // tree and give them new positions and parents.  From that point on, trusting the old
+            // tree at all is not possible as far too much of it may violate invariants.
+            var incrementalSourceFile = sourceFile;
+            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
+            incrementalSourceFile.hasBeenIncrementallyParsed = true;
+            var oldText = sourceFile.text;
+            var syntaxCursor = createSyntaxCursor(sourceFile);
+            // Make the actual change larger so that we know to reparse anything whose lookahead
+            // might have intersected the change.
+            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
+            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
+            // Ensure that extending the affected range only moved the start of the change range
+            // earlier in the file.
+            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
+            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
+            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
+            // The is the amount the nodes after the edit range need to be adjusted.  It can be
+            // positive (if the edit added characters), negative (if the edit deleted characters)
+            // or zero (if this was a pure overwrite with nothing added/removed).
+            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
+            // If we added or removed characters during the edit, then we need to go and adjust all
+            // the nodes after the edit.  Those nodes may move forward (if we inserted chars) or they
+            // may move backward (if we deleted chars).
+            //
+            // Doing this helps us out in two ways.  First, it means that any nodes/tokens we want
+            // to reuse are already at the appropriate position in the new text.  That way when we
+            // reuse them, we don't have to figure out if they need to be adjusted.  Second, it makes
+            // it very easy to determine if we can reuse a node.  If the node's position is at where
+            // we are in the text, then we can reuse it.  Otherwise we can't.  If the node's position
+            // is ahead of us, then we'll need to rescan tokens.  If the node's position is behind
+            // us, then we'll need to skip it or crumble it as appropriate
+            //
+            // We will also adjust the positions of nodes that intersect the change range as well.
+            // By doing this, we ensure that all the positions in the old tree are consistent, not
+            // just the positions of nodes entirely before/after the change range.  By being
+            // consistent, we can then easily map from positions to nodes in the old tree easily.
+            //
+            // Also, mark any syntax elements that intersect the changed span.  We know, up front,
+            // that we cannot reuse these elements.
+            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
+            // Now that we've set up our internal incremental state just proceed and parse the
+            // source file in the normal fashion.  When possible the parser will retrieve and
+            // reuse nodes from the old tree.
+            //
+            // Note: passing in 'true' for setNodeParents is very important.  When incrementally
+            // parsing, we will be reusing nodes from the old tree, and placing it into new
+            // parents.  If we don't set the parents now, we'll end up with an observably
+            // inconsistent tree.  Setting the parents on the new tree should be very fast.  We
+            // will immediately bail out of walking any subtrees when we can see that their parents
+            // are already correct.
+            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, /*setParentNodes*/ true, sourceFile.scriptKind);
+            return result;
+        }
+        IncrementalParser.updateSourceFile = updateSourceFile;
+        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
+            if (isArray) {
+                visitArray(element);
+            }
+            else {
+                visitNode(element);
+            }
+            return;
+            function visitNode(node) {
+                var text = "";
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    text = oldText.substring(node.pos, node.end);
+                }
+                // Ditch any existing LS children we may have created.  This way we can avoid
+                // moving them forward.
+                if (node._children) {
+                    node._children = undefined;
+                }
+                node.pos += delta;
+                node.end += delta;
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
+                }
+                forEachChild(node, visitNode, visitArray);
+                if (node.jsDocComments) {
+                    for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        forEachChild(jsDocComment, visitNode, visitArray);
+                    }
+                }
+                checkNodePositions(node, aggressiveChecks);
+            }
+            function visitArray(array) {
+                array._children = undefined;
+                array.pos += delta;
+                array.end += delta;
+                for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
+                    var node = array_7[_i];
+                    visitNode(node);
+                }
+            }
+        }
+        function shouldCheckNode(node) {
+            switch (node.kind) {
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                case 69 /* Identifier */:
+                    return true;
+            }
+            return false;
+        }
+        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
+            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
+            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
+            ts.Debug.assert(element.pos <= element.end);
+            // We have an element that intersects the change range in some way.  It may have its
+            // start, or its end (or both) in the changed range.  We want to adjust any part
+            // that intersects such that the final tree is in a consistent state.  i.e. all
+            // children have spans within the span of their parent, and all siblings are ordered
+            // properly.
+            // We may need to update both the 'pos' and the 'end' of the element.
+            // If the 'pos' is before the start of the change, then we don't need to touch it.
+            // If it isn't, then the 'pos' must be inside the change.  How we update it will
+            // depend if delta is  positive or negative.  If delta is positive then we have
+            // something like:
+            //
+            //  -------------------AAA-----------------
+            //  -------------------BBBCCCCCCC-----------------
+            //
+            // In this case, we consider any node that started in the change range to still be
+            // starting at the same position.
+            //
+            // however, if the delta is negative, then we instead have something like this:
+            //
+            //  -------------------XXXYYYYYYY-----------------
+            //  -------------------ZZZ-----------------
+            //
+            // In this case, any element that started in the 'X' range will keep its position.
+            // However any element that started after that will have their pos adjusted to be
+            // at the end of the new range.  i.e. any node that started in the 'Y' range will
+            // be adjusted to have their start at the end of the 'Z' range.
+            //
+            // The element will keep its position if possible.  Or Move backward to the new-end
+            // if it's in the 'Y' range.
+            element.pos = Math.min(element.pos, changeRangeNewEnd);
+            // If the 'end' is after the change range, then we always adjust it by the delta
+            // amount.  However, if the end is in the change range, then how we adjust it
+            // will depend on if delta is  positive or negative.  If delta is positive then we
+            // have something like:
+            //
+            //  -------------------AAA-----------------
+            //  -------------------BBBCCCCCCC-----------------
+            //
+            // In this case, we consider any node that ended inside the change range to keep its
+            // end position.
+            //
+            // however, if the delta is negative, then we instead have something like this:
+            //
+            //  -------------------XXXYYYYYYY-----------------
+            //  -------------------ZZZ-----------------
+            //
+            // In this case, any element that ended in the 'X' range will keep its position.
+            // However any element that ended after that will have their pos adjusted to be
+            // at the end of the new range.  i.e. any node that ended in the 'Y' range will
+            // be adjusted to have their end at the end of the 'Z' range.
+            if (element.end >= changeRangeOldEnd) {
+                // Element ends after the change range.  Always adjust the end pos.
+                element.end += delta;
+            }
+            else {
+                // Element ends in the change range.  The element will keep its position if
+                // possible. Or Move backward to the new-end if it's in the 'Y' range.
+                element.end = Math.min(element.end, changeRangeNewEnd);
+            }
+            ts.Debug.assert(element.pos <= element.end);
+            if (element.parent) {
+                ts.Debug.assert(element.pos >= element.parent.pos);
+                ts.Debug.assert(element.end <= element.parent.end);
+            }
+        }
+        function checkNodePositions(node, aggressiveChecks) {
+            if (aggressiveChecks) {
+                var pos_2 = node.pos;
+                forEachChild(node, function (child) {
+                    ts.Debug.assert(child.pos >= pos_2);
+                    pos_2 = child.end;
+                });
+                ts.Debug.assert(pos_2 <= node.end);
+            }
+        }
+        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
+            visitNode(sourceFile);
+            return;
+            function visitNode(child) {
+                ts.Debug.assert(child.pos <= child.end);
+                if (child.pos > changeRangeOldEnd) {
+                    // Node is entirely past the change range.  We need to move both its pos and
+                    // end, forward or backward appropriately.
+                    moveElementEntirelyPastChangeRange(child, /*isArray*/ false, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                // Check if the element intersects the change range.  If it does, then it is not
+                // reusable.  Also, we'll need to recurse to see what constituent portions we may
+                // be able to use.
+                var fullEnd = child.end;
+                if (fullEnd >= changeStart) {
+                    child.intersectsChange = true;
+                    child._children = undefined;
+                    // Adjust the pos or end (or both) of the intersecting element accordingly.
+                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    forEachChild(child, visitNode, visitArray);
+                    checkNodePositions(child, aggressiveChecks);
+                    return;
+                }
+                // Otherwise, the node is entirely before the change range.  No need to do anything with it.
+                ts.Debug.assert(fullEnd < changeStart);
+            }
+            function visitArray(array) {
+                ts.Debug.assert(array.pos <= array.end);
+                if (array.pos > changeRangeOldEnd) {
+                    // Array is entirely after the change range.  We need to move it, and move any of
+                    // its children.
+                    moveElementEntirelyPastChangeRange(array, /*isArray*/ true, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                // Check if the element intersects the change range.  If it does, then it is not
+                // reusable.  Also, we'll need to recurse to see what constituent portions we may
+                // be able to use.
+                var fullEnd = array.end;
+                if (fullEnd >= changeStart) {
+                    array.intersectsChange = true;
+                    array._children = undefined;
+                    // Adjust the pos or end (or both) of the intersecting array accordingly.
+                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
+                        var node = array_8[_i];
+                        visitNode(node);
+                    }
+                    return;
+                }
+                // Otherwise, the array is entirely before the change range.  No need to do anything with it.
+                ts.Debug.assert(fullEnd < changeStart);
+            }
+        }
+        function extendToAffectedRange(sourceFile, changeRange) {
+            // Consider the following code:
+            //      void foo() { /; }
+            //
+            // If the text changes with an insertion of / just before the semicolon then we end up with:
+            //      void foo() { //; }
+            //
+            // If we were to just use the changeRange a is, then we would not rescan the { token
+            // (as it does not intersect the actual original change range).  Because an edit may
+            // change the token touching it, we actually need to look back *at least* one token so
+            // that the prior token sees that change.
+            var maxLookahead = 1;
+            var start = changeRange.span.start;
+            // the first iteration aligns us with the change start. subsequent iteration move us to
+            // the left by maxLookahead tokens.  We only need to do this as long as we're not at the
+            // start of the tree.
+            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
+                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
+                ts.Debug.assert(nearestNode.pos <= start);
+                var position = nearestNode.pos;
+                start = Math.max(0, position - 1);
+            }
+            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
+            var finalLength = changeRange.newLength + (changeRange.span.start - start);
+            return ts.createTextChangeRange(finalSpan, finalLength);
+        }
+        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
+            var bestResult = sourceFile;
+            var lastNodeEntirelyBeforePosition;
+            forEachChild(sourceFile, visit);
+            if (lastNodeEntirelyBeforePosition) {
+                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
+                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
+                    bestResult = lastChildOfLastEntireNodeBeforePosition;
+                }
+            }
+            return bestResult;
+            function getLastChild(node) {
+                while (true) {
+                    var lastChild = getLastChildWorker(node);
+                    if (lastChild) {
+                        node = lastChild;
+                    }
+                    else {
+                        return node;
+                    }
+                }
+            }
+            function getLastChildWorker(node) {
+                var last = undefined;
+                forEachChild(node, function (child) {
+                    if (ts.nodeIsPresent(child)) {
+                        last = child;
+                    }
+                });
+                return last;
+            }
+            function visit(child) {
+                if (ts.nodeIsMissing(child)) {
+                    // Missing nodes are effectively invisible to us.  We never even consider them
+                    // When trying to find the nearest node before us.
+                    return;
+                }
+                // If the child intersects this position, then this node is currently the nearest
+                // node that starts before the position.
+                if (child.pos <= position) {
+                    if (child.pos >= bestResult.pos) {
+                        // This node starts before the position, and is closer to the position than
+                        // the previous best node we found.  It is now the new best node.
+                        bestResult = child;
+                    }
+                    // Now, the node may overlap the position, or it may end entirely before the
+                    // position.  If it overlaps with the position, then either it, or one of its
+                    // children must be the nearest node before the position.  So we can just
+                    // recurse into this child to see if we can find something better.
+                    if (position < child.end) {
+                        // The nearest node is either this child, or one of the children inside
+                        // of it.  We've already marked this child as the best so far.  Recurse
+                        // in case one of the children is better.
+                        forEachChild(child, visit);
+                        // Once we look at the children of this node, then there's no need to
+                        // continue any further.
+                        return true;
+                    }
+                    else {
+                        ts.Debug.assert(child.end <= position);
+                        // The child ends entirely before this position.  Say you have the following
+                        // (where $ is the position)
+                        //
+                        //      <complex expr 1> ? <complex expr 2> $ : <...> <...>
+                        //
+                        // We would want to find the nearest preceding node in "complex expr 2".
+                        // To support that, we keep track of this node, and once we're done searching
+                        // for a best node, we recurse down this node to see if we can find a good
+                        // result in it.
+                        //
+                        // This approach allows us to quickly skip over nodes that are entirely
+                        // before the position, while still allowing us to find any nodes in the
+                        // last one that might be what we want.
+                        lastNodeEntirelyBeforePosition = child;
+                    }
+                }
+                else {
+                    ts.Debug.assert(child.pos > position);
+                    // We're now at a node that is entirely past the position we're searching for.
+                    // This node (and all following nodes) could never contribute to the result,
+                    // so just skip them by returning 'true' here.
+                    return true;
+                }
+            }
+        }
+        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            var oldText = sourceFile.text;
+            if (textChangeRange) {
+                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
+                if (aggressiveChecks || ts.Debug.shouldAssert(3 /* VeryAggressive */)) {
+                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
+                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
+                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
+                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
+                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
+                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
+                }
+            }
+        }
+        function createSyntaxCursor(sourceFile) {
+            var currentArray = sourceFile.statements;
+            var currentArrayIndex = 0;
+            ts.Debug.assert(currentArrayIndex < currentArray.length);
+            var current = currentArray[currentArrayIndex];
+            var lastQueriedPosition = -1 /* Value */;
+            return {
+                currentNode: function (position) {
+                    // Only compute the current node if the position is different than the last time
+                    // we were asked.  The parser commonly asks for the node at the same position
+                    // twice.  Once to know if can read an appropriate list element at a certain point,
+                    // and then to actually read and consume the node.
+                    if (position !== lastQueriedPosition) {
+                        // Much of the time the parser will need the very next node in the array that
+                        // we just returned a node from.So just simply check for that case and move
+                        // forward in the array instead of searching for the node again.
+                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
+                            currentArrayIndex++;
+                            current = currentArray[currentArrayIndex];
+                        }
+                        // If we don't have a node, or the node we have isn't in the right position,
+                        // then try to find a viable node at the position requested.
+                        if (!current || current.pos !== position) {
+                            findHighestListElementThatStartsAtPosition(position);
+                        }
+                    }
+                    // Cache this query so that we don't do any extra work if the parser calls back
+                    // into us.  Note: this is very common as the parser will make pairs of calls like
+                    // 'isListElement -> parseListElement'.  If we were unable to find a node when
+                    // called with 'isListElement', we don't want to redo the work when parseListElement
+                    // is called immediately after.
+                    lastQueriedPosition = position;
+                    // Either we don'd have a node, or we have a node at the position being asked for.
+                    ts.Debug.assert(!current || current.pos === position);
+                    return current;
+                }
+            };
+            // Finds the highest element in the tree we can find that starts at the provided position.
+            // The element must be a direct child of some node list in the tree.  This way after we
+            // return it, we can easily return its next sibling in the list.
+            function findHighestListElementThatStartsAtPosition(position) {
+                // Clear out any cached state about the last node we found.
+                currentArray = undefined;
+                currentArrayIndex = -1 /* Value */;
+                current = undefined;
+                // Recurse into the source file to find the highest node at this position.
+                forEachChild(sourceFile, visitNode, visitArray);
+                return;
+                function visitNode(node) {
+                    if (position >= node.pos && position < node.end) {
+                        // Position was within this node.  Keep searching deeper to find the node.
+                        forEachChild(node, visitNode, visitArray);
+                        // don't proceed any further in the search.
+                        return true;
+                    }
+                    // position wasn't in this node, have to keep searching.
+                    return false;
+                }
+                function visitArray(array) {
+                    if (position >= array.pos && position < array.end) {
+                        // position was in this array.  Search through this array to see if we find a
+                        // viable element.
+                        for (var i = 0, n = array.length; i < n; i++) {
+                            var child = array[i];
+                            if (child) {
+                                if (child.pos === position) {
+                                    // Found the right node.  We're done.
+                                    currentArray = array;
+                                    currentArrayIndex = i;
+                                    current = child;
+                                    return true;
+                                }
+                                else {
+                                    if (child.pos < position && position < child.end) {
+                                        // Position in somewhere within this child.  Search in it and
+                                        // stop searching in this array.
+                                        forEachChild(child, visitNode, visitArray);
+                                        return true;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                    // position wasn't in this array, have to keep searching.
+                    return false;
+                }
+            }
+        }
+        var InvalidPosition;
+        (function (InvalidPosition) {
+            InvalidPosition[InvalidPosition["Value"] = -1] = "Value";
+        })(InvalidPosition || (InvalidPosition = {}));
+    })(IncrementalParser || (IncrementalParser = {}));
+})(ts || (ts = {}));
+/// <reference path="utilities.ts"/>
+/// <reference path="parser.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    ts.bindTime = 0;
+    (function (ModuleInstanceState) {
+        ModuleInstanceState[ModuleInstanceState["NonInstantiated"] = 0] = "NonInstantiated";
+        ModuleInstanceState[ModuleInstanceState["Instantiated"] = 1] = "Instantiated";
+        ModuleInstanceState[ModuleInstanceState["ConstEnumOnly"] = 2] = "ConstEnumOnly";
+    })(ts.ModuleInstanceState || (ts.ModuleInstanceState = {}));
+    var ModuleInstanceState = ts.ModuleInstanceState;
+    function getModuleInstanceState(node) {
+        // A module is uninstantiated if it contains only
+        // 1. interface declarations, type alias declarations
+        if (node.kind === 222 /* InterfaceDeclaration */ || node.kind === 223 /* TypeAliasDeclaration */) {
+            return 0 /* NonInstantiated */;
+        }
+        else if (ts.isConstEnumDeclaration(node)) {
+            return 2 /* ConstEnumOnly */;
+        }
+        else if ((node.kind === 230 /* ImportDeclaration */ || node.kind === 229 /* ImportEqualsDeclaration */) && !(node.flags & 1 /* Export */)) {
+            return 0 /* NonInstantiated */;
+        }
+        else if (node.kind === 226 /* ModuleBlock */) {
+            var state_1 = 0 /* NonInstantiated */;
+            ts.forEachChild(node, function (n) {
+                switch (getModuleInstanceState(n)) {
+                    case 0 /* NonInstantiated */:
+                        // child is non-instantiated - continue searching
+                        return false;
+                    case 2 /* ConstEnumOnly */:
+                        // child is const enum only - record state and continue searching
+                        state_1 = 2 /* ConstEnumOnly */;
+                        return false;
+                    case 1 /* Instantiated */:
+                        // child is instantiated - record state and stop
+                        state_1 = 1 /* Instantiated */;
+                        return true;
+                }
+            });
+            return state_1;
+        }
+        else if (node.kind === 225 /* ModuleDeclaration */) {
+            return getModuleInstanceState(node.body);
+        }
+        else {
+            return 1 /* Instantiated */;
+        }
+    }
+    ts.getModuleInstanceState = getModuleInstanceState;
+    var ContainerFlags;
+    (function (ContainerFlags) {
+        // The current node is not a container, and no container manipulation should happen before
+        // recursing into it.
+        ContainerFlags[ContainerFlags["None"] = 0] = "None";
+        // The current node is a container.  It should be set as the current container (and block-
+        // container) before recursing into it.  The current node does not have locals.  Examples:
+        //
+        //      Classes, ObjectLiterals, TypeLiterals, Interfaces...
+        ContainerFlags[ContainerFlags["IsContainer"] = 1] = "IsContainer";
+        // The current node is a block-scoped-container.  It should be set as the current block-
+        // container before recursing into it.  Examples:
+        //
+        //      Blocks (when not parented by functions), Catch clauses, For/For-in/For-of statements...
+        ContainerFlags[ContainerFlags["IsBlockScopedContainer"] = 2] = "IsBlockScopedContainer";
+        // The current node is the container of a control flow path. The current control flow should
+        // be saved and restored, and a new control flow initialized within the container.
+        ContainerFlags[ContainerFlags["IsControlFlowContainer"] = 4] = "IsControlFlowContainer";
+        ContainerFlags[ContainerFlags["IsFunctionLike"] = 8] = "IsFunctionLike";
+        ContainerFlags[ContainerFlags["IsFunctionExpression"] = 16] = "IsFunctionExpression";
+        ContainerFlags[ContainerFlags["HasLocals"] = 32] = "HasLocals";
+        ContainerFlags[ContainerFlags["IsInterface"] = 64] = "IsInterface";
+    })(ContainerFlags || (ContainerFlags = {}));
+    var binder = createBinder();
+    function bindSourceFile(file, options) {
+        var start = new Date().getTime();
+        binder(file, options);
+        ts.bindTime += new Date().getTime() - start;
+    }
+    ts.bindSourceFile = bindSourceFile;
+    function createBinder() {
+        var file;
+        var options;
+        var languageVersion;
+        var parent;
+        var container;
+        var blockScopeContainer;
+        var lastContainer;
+        var seenThisKeyword;
+        // state used by control flow analysis
+        var currentFlow;
+        var currentBreakTarget;
+        var currentContinueTarget;
+        var currentReturnTarget;
+        var currentTrueTarget;
+        var currentFalseTarget;
+        var preSwitchCaseFlow;
+        var activeLabels;
+        var hasExplicitReturn;
+        // state used for emit helpers
+        var emitFlags;
+        // If this file is an external module, then it is automatically in strict-mode according to
+        // ES6.  If it is not an external module, then we'll determine if it is in strict mode or
+        // not depending on if we see "use strict" in certain places (or if we hit a class/namespace).
+        var inStrictMode;
+        var symbolCount = 0;
+        var Symbol;
+        var classifiableNames;
+        var unreachableFlow = { flags: 1 /* Unreachable */ };
+        var reportedUnreachableFlow = { flags: 1 /* Unreachable */ };
+        function bindSourceFile(f, opts) {
+            file = f;
+            options = opts;
+            languageVersion = ts.getEmitScriptTarget(options);
+            inStrictMode = !!file.externalModuleIndicator;
+            classifiableNames = {};
+            symbolCount = 0;
+            Symbol = ts.objectAllocator.getSymbolConstructor();
+            if (!file.locals) {
+                bind(file);
+                file.symbolCount = symbolCount;
+                file.classifiableNames = classifiableNames;
+            }
+            file = undefined;
+            options = undefined;
+            languageVersion = undefined;
+            parent = undefined;
+            container = undefined;
+            blockScopeContainer = undefined;
+            lastContainer = undefined;
+            seenThisKeyword = false;
+            currentFlow = undefined;
+            currentBreakTarget = undefined;
+            currentContinueTarget = undefined;
+            currentReturnTarget = undefined;
+            currentTrueTarget = undefined;
+            currentFalseTarget = undefined;
+            activeLabels = undefined;
+            hasExplicitReturn = false;
+            emitFlags = 0 /* None */;
+        }
+        return bindSourceFile;
+        function createSymbol(flags, name) {
+            symbolCount++;
+            return new Symbol(flags, name);
+        }
+        function addDeclarationToSymbol(symbol, node, symbolFlags) {
+            symbol.flags |= symbolFlags;
+            node.symbol = symbol;
+            if (!symbol.declarations) {
+                symbol.declarations = [];
+            }
+            symbol.declarations.push(node);
+            if (symbolFlags & 1952 /* HasExports */ && !symbol.exports) {
+                symbol.exports = {};
+            }
+            if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
+                symbol.members = {};
+            }
+            if (symbolFlags & 107455 /* Value */) {
+                var valueDeclaration = symbol.valueDeclaration;
+                if (!valueDeclaration ||
+                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 225 /* ModuleDeclaration */)) {
+                    // other kinds of value declarations take precedence over modules
+                    symbol.valueDeclaration = node;
+                }
+            }
+        }
+        // Should not be called on a declaration with a computed property name,
+        // unless it is a well known Symbol.
+        function getDeclarationName(node) {
+            if (node.name) {
+                if (ts.isAmbientModule(node)) {
+                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
+                }
+                if (node.name.kind === 140 /* ComputedPropertyName */) {
+                    var nameExpression = node.name.expression;
+                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
+                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
+                        return nameExpression.text;
+                    }
+                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
+                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
+                }
+                return node.name.text;
+            }
+            switch (node.kind) {
+                case 148 /* Constructor */:
+                    return "__constructor";
+                case 156 /* FunctionType */:
+                case 151 /* CallSignature */:
+                    return "__call";
+                case 157 /* ConstructorType */:
+                case 152 /* ConstructSignature */:
+                    return "__new";
+                case 153 /* IndexSignature */:
+                    return "__index";
+                case 236 /* ExportDeclaration */:
+                    return "__export";
+                case 235 /* ExportAssignment */:
+                    return node.isExportEquals ? "export=" : "default";
+                case 187 /* BinaryExpression */:
+                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
+                        case 2 /* ModuleExports */:
+                            // module.exports = ...
+                            return "export=";
+                        case 1 /* ExportsProperty */:
+                        case 4 /* ThisProperty */:
+                            // exports.x = ... or this.y = ...
+                            return node.left.name.text;
+                        case 3 /* PrototypeProperty */:
+                            // className.prototype.methodName = ...
+                            return node.left.expression.name.text;
+                    }
+                    ts.Debug.fail("Unknown binary declaration kind");
+                    break;
+                case 220 /* FunctionDeclaration */:
+                case 221 /* ClassDeclaration */:
+                    return node.flags & 512 /* Default */ ? "default" : undefined;
+                case 269 /* JSDocFunctionType */:
+                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
+                case 142 /* Parameter */:
+                    // Parameters with names are handled at the top of this function.  Parameters
+                    // without names can only come from JSDocFunctionTypes.
+                    ts.Debug.assert(node.parent.kind === 269 /* JSDocFunctionType */);
+                    var functionType = node.parent;
+                    var index = ts.indexOf(functionType.parameters, node);
+                    return "p" + index;
+                case 279 /* JSDocTypedefTag */:
+                    var parentNode = node.parent && node.parent.parent;
+                    var nameFromParentNode = void 0;
+                    if (parentNode && parentNode.kind === 200 /* VariableStatement */) {
+                        if (parentNode.declarationList.declarations.length > 0) {
+                            var nameIdentifier = parentNode.declarationList.declarations[0].name;
+                            if (nameIdentifier.kind === 69 /* Identifier */) {
+                                nameFromParentNode = nameIdentifier.text;
+                            }
+                        }
+                    }
+                    return nameFromParentNode;
+            }
+        }
+        function getDisplayName(node) {
+            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
+        }
+        /**
+         * Declares a Symbol for the node and adds it to symbols. Reports errors for conflicting identifier names.
+         * @param symbolTable - The symbol table which node will be added to.
+         * @param parent - node's parent declaration.
+         * @param node - The declaration to be added to the symbol table
+         * @param includes - The SymbolFlags that node has in addition to its declaration type (eg: export, ambient, etc.)
+         * @param excludes - The flags which node cannot be declared alongside in a symbol table. Used to report forbidden declarations.
+         */
+        function declareSymbol(symbolTable, parent, node, includes, excludes) {
+            ts.Debug.assert(!ts.hasDynamicName(node));
+            var isDefaultExport = node.flags & 512 /* Default */;
+            // The exported symbol for an export default function/class node is always named "default"
+            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
+            var symbol;
+            if (name !== undefined) {
+                // Check and see if the symbol table already has a symbol with this name.  If not,
+                // create a new symbol with this name and add it to the table.  Note that we don't
+                // give the new symbol any flags *yet*.  This ensures that it will not conflict
+                // with the 'excludes' flags we pass in.
+                //
+                // If we do get an existing symbol, see if it conflicts with the new symbol we're
+                // creating.  For example, a 'var' symbol and a 'class' symbol will conflict within
+                // the same symbol table.  If we have a conflict, report the issue on each
+                // declaration we have for this symbol, and then create a new symbol for this
+                // declaration.
+                //
+                // If we created a new symbol, either because we didn't have a symbol with this name
+                // in the symbol table, or we conflicted with an existing symbol, then just add this
+                // node as the sole declaration of the new symbol.
+                //
+                // Otherwise, we'll be merging into a compatible existing symbol (for example when
+                // you have multiple 'vars' with the same name in the same container).  In this case
+                // just add this node into the declarations list of the symbol.
+                symbol = ts.hasProperty(symbolTable, name)
+                    ? symbolTable[name]
+                    : (symbolTable[name] = createSymbol(0 /* None */, name));
+                if (name && (includes & 788448 /* Classifiable */)) {
+                    classifiableNames[name] = name;
+                }
+                if (symbol.flags & excludes) {
+                    if (node.name) {
+                        node.name.parent = node;
+                    }
+                    // Report errors every position with duplicate declaration
+                    // Report errors on previous encountered declarations
+                    var message_1 = symbol.flags & 2 /* BlockScopedVariable */
+                        ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
+                        : ts.Diagnostics.Duplicate_identifier_0;
+                    ts.forEach(symbol.declarations, function (declaration) {
+                        if (declaration.flags & 512 /* Default */) {
+                            message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
+                        }
+                    });
+                    ts.forEach(symbol.declarations, function (declaration) {
+                        file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
+                    });
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
+                    symbol = createSymbol(0 /* None */, name);
+                }
+            }
+            else {
+                symbol = createSymbol(0 /* None */, "__missing");
+            }
+            addDeclarationToSymbol(symbol, node, includes);
+            symbol.parent = parent;
+            return symbol;
+        }
+        function declareModuleMember(node, symbolFlags, symbolExcludes) {
+            var hasExportModifier = ts.getCombinedNodeFlags(node) & 1 /* Export */;
+            if (symbolFlags & 8388608 /* Alias */) {
+                if (node.kind === 238 /* ExportSpecifier */ || (node.kind === 229 /* ImportEqualsDeclaration */ && hasExportModifier)) {
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                }
+                else {
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                }
+            }
+            else {
+                // Exported module members are given 2 symbols: A local symbol that is classified with an ExportValue,
+                // ExportType, or ExportContainer flag, and an associated export symbol with all the correct flags set
+                // on it. There are 2 main reasons:
+                //
+                //   1. We treat locals and exports of the same name as mutually exclusive within a container.
+                //      That means the binder will issue a Duplicate Identifier error if you mix locals and exports
+                //      with the same name in the same container.
+                //      TODO: Make this a more specific error and decouple it from the exclusion logic.
+                //   2. When we checkIdentifier in the checker, we set its resolved symbol to the local symbol,
+                //      but return the export symbol (by calling getExportSymbolOfValueSymbolIfExported). That way
+                //      when the emitter comes back to it, it knows not to qualify the name if it was found in a containing scope.
+                // NOTE: Nested ambient modules always should go to to 'locals' table to prevent their automatic merge
+                //       during global merging in the checker. Why? The only case when ambient module is permitted inside another module is module augmentation
+                //       and this case is specially handled. Module augmentations should only be merged with original module definition
+                //       and should never be merged directly with other augmentation, and the latter case would be possible if automatic merge is allowed.
+                if (!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 8192 /* ExportContext */)) {
+                    var exportKind = (symbolFlags & 107455 /* Value */ ? 1048576 /* ExportValue */ : 0) |
+                        (symbolFlags & 793056 /* Type */ ? 2097152 /* ExportType */ : 0) |
+                        (symbolFlags & 1536 /* Namespace */ ? 4194304 /* ExportNamespace */ : 0);
+                    var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
+                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                    node.localSymbol = local;
+                    return local;
+                }
+                else {
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                }
+            }
+        }
+        // All container nodes are kept on a linked list in declaration order. This list is used by
+        // the getLocalNameOfContainer function in the type checker to validate that the local name
+        // used for a container is unique.
+        function bindContainer(node, containerFlags) {
+            // Before we recurse into a node's children, we first save the existing parent, container
+            // and block-container.  Then after we pop out of processing the children, we restore
+            // these saved values.
+            var saveContainer = container;
+            var savedBlockScopeContainer = blockScopeContainer;
+            // Depending on what kind of node this is, we may have to adjust the current container
+            // and block-container.   If the current node is a container, then it is automatically
+            // considered the current block-container as well.  Also, for containers that we know
+            // may contain locals, we proactively initialize the .locals field. We do this because
+            // it's highly likely that the .locals will be needed to place some child in (for example,
+            // a parameter, or variable declaration).
+            //
+            // However, we do not proactively create the .locals for block-containers because it's
+            // totally normal and common for block-containers to never actually have a block-scoped
+            // variable in them.  We don't want to end up allocating an object for every 'block' we
+            // run into when most of them won't be necessary.
+            //
+            // Finally, if this is a block-container, then we clear out any existing .locals object
+            // it may contain within it.  This happens in incremental scenarios.  Because we can be
+            // reusing a node from a previous compilation, that node may have had 'locals' created
+            // for it.  We must clear this so we don't accidentally move any stale data forward from
+            // a previous compilation.
+            if (containerFlags & 1 /* IsContainer */) {
+                container = blockScopeContainer = node;
+                if (containerFlags & 32 /* HasLocals */) {
+                    container.locals = {};
+                }
+                addToContainerChain(container);
+            }
+            else if (containerFlags & 2 /* IsBlockScopedContainer */) {
+                blockScopeContainer = node;
+                blockScopeContainer.locals = undefined;
+            }
+            if (containerFlags & 4 /* IsControlFlowContainer */) {
+                var saveCurrentFlow = currentFlow;
+                var saveBreakTarget = currentBreakTarget;
+                var saveContinueTarget = currentContinueTarget;
+                var saveReturnTarget = currentReturnTarget;
+                var saveActiveLabels = activeLabels;
+                var saveHasExplicitReturn = hasExplicitReturn;
+                var isIIFE = containerFlags & 16 /* IsFunctionExpression */ && !!ts.getImmediatelyInvokedFunctionExpression(node);
+                // An IIFE is considered part of the containing control flow. Return statements behave
+                // similarly to break statements that exit to a label just past the statement body.
+                if (isIIFE) {
+                    currentReturnTarget = createBranchLabel();
+                }
+                else {
+                    currentFlow = { flags: 2 /* Start */ };
+                    if (containerFlags & 16 /* IsFunctionExpression */) {
+                        currentFlow.container = node;
+                    }
+                    currentReturnTarget = undefined;
+                }
+                currentBreakTarget = undefined;
+                currentContinueTarget = undefined;
+                activeLabels = undefined;
+                hasExplicitReturn = false;
+                bindChildren(node);
+                // Reset all reachability check related flags on node (for incremental scenarios)
+                // Reset all emit helper flags on node (for incremental scenarios)
+                node.flags &= ~4030464 /* ReachabilityAndEmitFlags */;
+                if (!(currentFlow.flags & 1 /* Unreachable */) && containerFlags & 8 /* IsFunctionLike */ && ts.nodeIsPresent(node.body)) {
+                    node.flags |= 32768 /* HasImplicitReturn */;
+                    if (hasExplicitReturn)
+                        node.flags |= 65536 /* HasExplicitReturn */;
+                }
+                if (node.kind === 256 /* SourceFile */) {
+                    node.flags |= emitFlags;
+                }
+                if (isIIFE) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                    currentFlow = finishFlowLabel(currentReturnTarget);
+                }
+                else {
+                    currentFlow = saveCurrentFlow;
+                }
+                currentBreakTarget = saveBreakTarget;
+                currentContinueTarget = saveContinueTarget;
+                currentReturnTarget = saveReturnTarget;
+                activeLabels = saveActiveLabels;
+                hasExplicitReturn = saveHasExplicitReturn;
+            }
+            else if (containerFlags & 64 /* IsInterface */) {
+                seenThisKeyword = false;
+                bindChildren(node);
+                node.flags = seenThisKeyword ? node.flags | 16384 /* ContainsThis */ : node.flags & ~16384 /* ContainsThis */;
+            }
+            else {
+                bindChildren(node);
+            }
+            container = saveContainer;
+            blockScopeContainer = savedBlockScopeContainer;
+        }
+        function bindChildren(node) {
+            // Binding of JsDocComment should be done before the current block scope container changes.
+            // because the scope of JsDocComment should not be affected by whether the current node is a
+            // container or not.
+            if (ts.isInJavaScriptFile(node) && node.jsDocComments) {
+                for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                    var jsDocComment = _a[_i];
+                    bind(jsDocComment);
+                }
+            }
+            if (checkUnreachable(node)) {
+                ts.forEachChild(node, bind);
+                return;
+            }
+            switch (node.kind) {
+                case 205 /* WhileStatement */:
+                    bindWhileStatement(node);
+                    break;
+                case 204 /* DoStatement */:
+                    bindDoStatement(node);
+                    break;
+                case 206 /* ForStatement */:
+                    bindForStatement(node);
+                    break;
+                case 207 /* ForInStatement */:
+                case 208 /* ForOfStatement */:
+                    bindForInOrForOfStatement(node);
+                    break;
+                case 203 /* IfStatement */:
+                    bindIfStatement(node);
+                    break;
+                case 211 /* ReturnStatement */:
+                case 215 /* ThrowStatement */:
+                    bindReturnOrThrow(node);
+                    break;
+                case 210 /* BreakStatement */:
+                case 209 /* ContinueStatement */:
+                    bindBreakOrContinueStatement(node);
+                    break;
+                case 216 /* TryStatement */:
+                    bindTryStatement(node);
+                    break;
+                case 213 /* SwitchStatement */:
+                    bindSwitchStatement(node);
+                    break;
+                case 227 /* CaseBlock */:
+                    bindCaseBlock(node);
+                    break;
+                case 214 /* LabeledStatement */:
+                    bindLabeledStatement(node);
+                    break;
+                case 185 /* PrefixUnaryExpression */:
+                    bindPrefixUnaryExpressionFlow(node);
+                    break;
+                case 187 /* BinaryExpression */:
+                    bindBinaryExpressionFlow(node);
+                    break;
+                case 181 /* DeleteExpression */:
+                    bindDeleteExpressionFlow(node);
+                    break;
+                case 188 /* ConditionalExpression */:
+                    bindConditionalExpressionFlow(node);
+                    break;
+                case 218 /* VariableDeclaration */:
+                    bindVariableDeclarationFlow(node);
+                    break;
+                case 174 /* CallExpression */:
+                    bindCallExpressionFlow(node);
+                    break;
+                default:
+                    ts.forEachChild(node, bind);
+                    break;
+            }
+        }
+        function isNarrowableReference(expr) {
+            return expr.kind === 69 /* Identifier */ ||
+                expr.kind === 97 /* ThisKeyword */ ||
+                expr.kind === 172 /* PropertyAccessExpression */ && isNarrowableReference(expr.expression);
+        }
+        function isNarrowingExpression(expr) {
+            switch (expr.kind) {
+                case 69 /* Identifier */:
+                case 97 /* ThisKeyword */:
+                case 172 /* PropertyAccessExpression */:
+                    return isNarrowableReference(expr);
+                case 174 /* CallExpression */:
+                    return true;
+                case 178 /* ParenthesizedExpression */:
+                    return isNarrowingExpression(expr.expression);
+                case 187 /* BinaryExpression */:
+                    return isNarrowingBinaryExpression(expr);
+                case 185 /* PrefixUnaryExpression */:
+                    return expr.operator === 49 /* ExclamationToken */ && isNarrowingExpression(expr.operand);
+            }
+            return false;
+        }
+        function isNarrowingBinaryExpression(expr) {
+            switch (expr.operatorToken.kind) {
+                case 56 /* EqualsToken */:
+                    return isNarrowableReference(expr.left);
+                case 30 /* EqualsEqualsToken */:
+                case 31 /* ExclamationEqualsToken */:
+                case 32 /* EqualsEqualsEqualsToken */:
+                case 33 /* ExclamationEqualsEqualsToken */:
+                    if (isNarrowingExpression(expr.left) && (expr.right.kind === 93 /* NullKeyword */ || expr.right.kind === 69 /* Identifier */)) {
+                        return true;
+                    }
+                    if (expr.left.kind === 182 /* TypeOfExpression */ && isNarrowingExpression(expr.left.expression) && expr.right.kind === 9 /* StringLiteral */) {
+                        return true;
+                    }
+                    return false;
+                case 91 /* InstanceOfKeyword */:
+                    return isNarrowingExpression(expr.left);
+                case 24 /* CommaToken */:
+                    return isNarrowingExpression(expr.right);
+            }
+            return false;
+        }
+        function createBranchLabel() {
+            return {
+                flags: 4 /* BranchLabel */,
+                antecedents: undefined
+            };
+        }
+        function createLoopLabel() {
+            return {
+                flags: 8 /* LoopLabel */,
+                antecedents: undefined
+            };
+        }
+        function setFlowNodeReferenced(flow) {
+            // On first reference we set the Referenced flag, thereafter we set the Shared flag
+            flow.flags |= flow.flags & 128 /* Referenced */ ? 256 /* Shared */ : 128 /* Referenced */;
+        }
+        function addAntecedent(label, antecedent) {
+            if (!(antecedent.flags & 1 /* Unreachable */) && !ts.contains(label.antecedents, antecedent)) {
+                (label.antecedents || (label.antecedents = [])).push(antecedent);
+                setFlowNodeReferenced(antecedent);
+            }
+        }
+        function createFlowCondition(flags, antecedent, expression) {
+            if (antecedent.flags & 1 /* Unreachable */) {
+                return antecedent;
+            }
+            if (!expression) {
+                return flags & 32 /* TrueCondition */ ? antecedent : unreachableFlow;
+            }
+            if (expression.kind === 99 /* TrueKeyword */ && flags & 64 /* FalseCondition */ ||
+                expression.kind === 84 /* FalseKeyword */ && flags & 32 /* TrueCondition */) {
+                return unreachableFlow;
+            }
+            if (!isNarrowingExpression(expression)) {
+                return antecedent;
+            }
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: flags,
+                antecedent: antecedent,
+                expression: expression
+            };
+        }
+        function createFlowAssignment(antecedent, node) {
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: 16 /* Assignment */,
+                antecedent: antecedent,
+                node: node
+            };
+        }
+        function finishFlowLabel(flow) {
+            var antecedents = flow.antecedents;
+            if (!antecedents) {
+                return unreachableFlow;
+            }
+            if (antecedents.length === 1) {
+                return antecedents[0];
+            }
+            return flow;
+        }
+        function isStatementCondition(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 203 /* IfStatement */:
+                case 205 /* WhileStatement */:
+                case 204 /* DoStatement */:
+                    return parent.expression === node;
+                case 206 /* ForStatement */:
+                case 188 /* ConditionalExpression */:
+                    return parent.condition === node;
+            }
+            return false;
+        }
+        function isLogicalExpression(node) {
+            while (true) {
+                if (node.kind === 178 /* ParenthesizedExpression */) {
+                    node = node.expression;
+                }
+                else if (node.kind === 185 /* PrefixUnaryExpression */ && node.operator === 49 /* ExclamationToken */) {
+                    node = node.operand;
+                }
+                else {
+                    return node.kind === 187 /* BinaryExpression */ && (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */ ||
+                        node.operatorToken.kind === 52 /* BarBarToken */);
+                }
+            }
+        }
+        function isTopLevelLogicalExpression(node) {
+            while (node.parent.kind === 178 /* ParenthesizedExpression */ ||
+                node.parent.kind === 185 /* PrefixUnaryExpression */ &&
+                    node.parent.operator === 49 /* ExclamationToken */) {
+                node = node.parent;
+            }
+            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
+        }
+        function bindCondition(node, trueTarget, falseTarget) {
+            var saveTrueTarget = currentTrueTarget;
+            var saveFalseTarget = currentFalseTarget;
+            currentTrueTarget = trueTarget;
+            currentFalseTarget = falseTarget;
+            bind(node);
+            currentTrueTarget = saveTrueTarget;
+            currentFalseTarget = saveFalseTarget;
+            if (!node || !isLogicalExpression(node)) {
+                addAntecedent(trueTarget, createFlowCondition(32 /* TrueCondition */, currentFlow, node));
+                addAntecedent(falseTarget, createFlowCondition(64 /* FalseCondition */, currentFlow, node));
+            }
+        }
+        function bindIterativeStatement(node, breakTarget, continueTarget) {
+            var saveBreakTarget = currentBreakTarget;
+            var saveContinueTarget = currentContinueTarget;
+            currentBreakTarget = breakTarget;
+            currentContinueTarget = continueTarget;
+            bind(node);
+            currentBreakTarget = saveBreakTarget;
+            currentContinueTarget = saveContinueTarget;
+        }
+        function bindWhileStatement(node) {
+            var preWhileLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postWhileLabel = createBranchLabel();
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = preWhileLabel;
+            bindCondition(node.expression, preBodyLabel, postWhileLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = finishFlowLabel(postWhileLabel);
+        }
+        function bindDoStatement(node) {
+            var preDoLabel = createLoopLabel();
+            var preConditionLabel = createBranchLabel();
+            var postDoLabel = createBranchLabel();
+            addAntecedent(preDoLabel, currentFlow);
+            currentFlow = preDoLabel;
+            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
+            addAntecedent(preConditionLabel, currentFlow);
+            currentFlow = finishFlowLabel(preConditionLabel);
+            bindCondition(node.expression, preDoLabel, postDoLabel);
+            currentFlow = finishFlowLabel(postDoLabel);
+        }
+        function bindForStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postLoopLabel = createBranchLabel();
+            bind(node.initializer);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            bindCondition(node.condition, preBodyLabel, postLoopLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            bind(node.incrementor);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
+        }
+        function bindForInOrForOfStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var postLoopLabel = createBranchLabel();
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            bind(node.expression);
+            addAntecedent(postLoopLabel, currentFlow);
+            bind(node.initializer);
+            if (node.initializer.kind !== 219 /* VariableDeclarationList */) {
+                bindAssignmentTargetFlow(node.initializer);
+            }
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
+        }
+        function bindIfStatement(node) {
+            var thenLabel = createBranchLabel();
+            var elseLabel = createBranchLabel();
+            var postIfLabel = createBranchLabel();
+            bindCondition(node.expression, thenLabel, elseLabel);
+            currentFlow = finishFlowLabel(thenLabel);
+            bind(node.thenStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(elseLabel);
+            bind(node.elseStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(postIfLabel);
+        }
+        function bindReturnOrThrow(node) {
+            bind(node.expression);
+            if (node.kind === 211 /* ReturnStatement */) {
+                hasExplicitReturn = true;
+                if (currentReturnTarget) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                }
+            }
+            currentFlow = unreachableFlow;
+        }
+        function findActiveLabel(name) {
+            if (activeLabels) {
+                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
+                    var label = activeLabels_1[_i];
+                    if (label.name === name) {
+                        return label;
+                    }
+                }
+            }
+            return undefined;
+        }
+        function bindbreakOrContinueFlow(node, breakTarget, continueTarget) {
+            var flowLabel = node.kind === 210 /* BreakStatement */ ? breakTarget : continueTarget;
+            if (flowLabel) {
+                addAntecedent(flowLabel, currentFlow);
+                currentFlow = unreachableFlow;
+            }
+        }
+        function bindBreakOrContinueStatement(node) {
+            bind(node.label);
+            if (node.label) {
+                var activeLabel = findActiveLabel(node.label.text);
+                if (activeLabel) {
+                    activeLabel.referenced = true;
+                    bindbreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
+                }
+            }
+            else {
+                bindbreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
+            }
+        }
+        function bindTryStatement(node) {
+            var postFinallyLabel = createBranchLabel();
+            var preTryFlow = currentFlow;
+            // TODO: Every statement in try block is potentially an exit point!
+            bind(node.tryBlock);
+            addAntecedent(postFinallyLabel, currentFlow);
+            if (node.catchClause) {
+                currentFlow = preTryFlow;
+                bind(node.catchClause);
+                addAntecedent(postFinallyLabel, currentFlow);
+            }
+            if (node.finallyBlock) {
+                currentFlow = preTryFlow;
+                bind(node.finallyBlock);
+            }
+            currentFlow = finishFlowLabel(postFinallyLabel);
+        }
+        function bindSwitchStatement(node) {
+            var postSwitchLabel = createBranchLabel();
+            bind(node.expression);
+            var saveBreakTarget = currentBreakTarget;
+            var savePreSwitchCaseFlow = preSwitchCaseFlow;
+            currentBreakTarget = postSwitchLabel;
+            preSwitchCaseFlow = currentFlow;
+            bind(node.caseBlock);
+            addAntecedent(postSwitchLabel, currentFlow);
+            var hasNonEmptyDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 250 /* DefaultClause */ && c.statements.length; });
+            if (!hasNonEmptyDefault) {
+                addAntecedent(postSwitchLabel, preSwitchCaseFlow);
+            }
+            currentBreakTarget = saveBreakTarget;
+            preSwitchCaseFlow = savePreSwitchCaseFlow;
+            currentFlow = finishFlowLabel(postSwitchLabel);
+        }
+        function bindCaseBlock(node) {
+            var clauses = node.clauses;
+            for (var i = 0; i < clauses.length; i++) {
+                var clause = clauses[i];
+                if (clause.statements.length) {
+                    if (currentFlow.flags & 1 /* Unreachable */) {
+                        currentFlow = preSwitchCaseFlow;
+                    }
+                    else {
+                        var preCaseLabel = createBranchLabel();
+                        addAntecedent(preCaseLabel, preSwitchCaseFlow);
+                        addAntecedent(preCaseLabel, currentFlow);
+                        currentFlow = finishFlowLabel(preCaseLabel);
+                    }
+                    bind(clause);
+                    if (!(currentFlow.flags & 1 /* Unreachable */) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
+                        errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
+                    }
+                }
+                else {
+                    bind(clause);
+                }
+            }
+        }
+        function pushActiveLabel(name, breakTarget, continueTarget) {
+            var activeLabel = {
+                name: name,
+                breakTarget: breakTarget,
+                continueTarget: continueTarget,
+                referenced: false
+            };
+            (activeLabels || (activeLabels = [])).push(activeLabel);
+            return activeLabel;
+        }
+        function popActiveLabel() {
+            activeLabels.pop();
+        }
+        function bindLabeledStatement(node) {
+            var preStatementLabel = createLoopLabel();
+            var postStatementLabel = createBranchLabel();
+            bind(node.label);
+            addAntecedent(preStatementLabel, currentFlow);
+            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
+            bind(node.statement);
+            popActiveLabel();
+            if (!activeLabel.referenced && !options.allowUnusedLabels) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
+            }
+            addAntecedent(postStatementLabel, currentFlow);
+            currentFlow = finishFlowLabel(postStatementLabel);
+        }
+        function bindDestructuringTargetFlow(node) {
+            if (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 56 /* EqualsToken */) {
+                bindAssignmentTargetFlow(node.left);
+            }
+            else {
+                bindAssignmentTargetFlow(node);
+            }
+        }
+        function bindAssignmentTargetFlow(node) {
+            if (isNarrowableReference(node)) {
+                currentFlow = createFlowAssignment(currentFlow, node);
+            }
+            else if (node.kind === 170 /* ArrayLiteralExpression */) {
+                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
+                    var e = _a[_i];
+                    if (e.kind === 191 /* SpreadElementExpression */) {
+                        bindAssignmentTargetFlow(e.expression);
+                    }
+                    else {
+                        bindDestructuringTargetFlow(e);
+                    }
+                }
+            }
+            else if (node.kind === 171 /* ObjectLiteralExpression */) {
+                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
+                    var p = _c[_b];
+                    if (p.kind === 253 /* PropertyAssignment */) {
+                        bindDestructuringTargetFlow(p.initializer);
+                    }
+                    else if (p.kind === 254 /* ShorthandPropertyAssignment */) {
+                        bindAssignmentTargetFlow(p.name);
+                    }
+                }
+            }
+        }
+        function bindLogicalExpression(node, trueTarget, falseTarget) {
+            var preRightLabel = createBranchLabel();
+            if (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */) {
+                bindCondition(node.left, preRightLabel, falseTarget);
+            }
+            else {
+                bindCondition(node.left, trueTarget, preRightLabel);
+            }
+            currentFlow = finishFlowLabel(preRightLabel);
+            bind(node.operatorToken);
+            bindCondition(node.right, trueTarget, falseTarget);
+        }
+        function bindPrefixUnaryExpressionFlow(node) {
+            if (node.operator === 49 /* ExclamationToken */) {
+                var saveTrueTarget = currentTrueTarget;
+                currentTrueTarget = currentFalseTarget;
+                currentFalseTarget = saveTrueTarget;
+                ts.forEachChild(node, bind);
+                currentFalseTarget = currentTrueTarget;
+                currentTrueTarget = saveTrueTarget;
+            }
+            else {
+                ts.forEachChild(node, bind);
+            }
+        }
+        function bindBinaryExpressionFlow(node) {
+            var operator = node.operatorToken.kind;
+            if (operator === 51 /* AmpersandAmpersandToken */ || operator === 52 /* BarBarToken */) {
+                if (isTopLevelLogicalExpression(node)) {
+                    var postExpressionLabel = createBranchLabel();
+                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
+                    currentFlow = finishFlowLabel(postExpressionLabel);
+                }
+                else {
+                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
+                }
+            }
+            else {
+                ts.forEachChild(node, bind);
+                if (operator === 56 /* EqualsToken */ && !ts.isAssignmentTarget(node)) {
+                    bindAssignmentTargetFlow(node.left);
+                }
+            }
+        }
+        function bindDeleteExpressionFlow(node) {
+            ts.forEachChild(node, bind);
+            if (node.expression.kind === 172 /* PropertyAccessExpression */) {
+                bindAssignmentTargetFlow(node.expression);
+            }
+        }
+        function bindConditionalExpressionFlow(node) {
+            var trueLabel = createBranchLabel();
+            var falseLabel = createBranchLabel();
+            var postExpressionLabel = createBranchLabel();
+            bindCondition(node.condition, trueLabel, falseLabel);
+            currentFlow = finishFlowLabel(trueLabel);
+            bind(node.whenTrue);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(falseLabel);
+            bind(node.whenFalse);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(postExpressionLabel);
+        }
+        function bindInitializedVariableFlow(node) {
+            var name = node.name;
+            if (ts.isBindingPattern(name)) {
+                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
+                    var child = _a[_i];
+                    bindInitializedVariableFlow(child);
+                }
+            }
+            else {
+                currentFlow = createFlowAssignment(currentFlow, node);
+            }
+        }
+        function bindVariableDeclarationFlow(node) {
+            ts.forEachChild(node, bind);
+            if (node.initializer || node.parent.parent.kind === 207 /* ForInStatement */ || node.parent.parent.kind === 208 /* ForOfStatement */) {
+                bindInitializedVariableFlow(node);
+            }
+        }
+        function bindCallExpressionFlow(node) {
+            // If the target of the call expression is a function expression or arrow function we have
+            // an immediately invoked function expression (IIFE). Initialize the flowNode property to
+            // the current control flow (which includes evaluation of the IIFE arguments).
+            var expr = node.expression;
+            while (expr.kind === 178 /* ParenthesizedExpression */) {
+                expr = expr.expression;
+            }
+            if (expr.kind === 179 /* FunctionExpression */ || expr.kind === 180 /* ArrowFunction */) {
+                ts.forEach(node.typeArguments, bind);
+                ts.forEach(node.arguments, bind);
+                bind(node.expression);
+            }
+            else {
+                ts.forEachChild(node, bind);
+            }
+        }
+        function getContainerFlags(node) {
+            switch (node.kind) {
+                case 192 /* ClassExpression */:
+                case 221 /* ClassDeclaration */:
+                case 224 /* EnumDeclaration */:
+                case 171 /* ObjectLiteralExpression */:
+                case 159 /* TypeLiteral */:
+                case 281 /* JSDocTypeLiteral */:
+                case 265 /* JSDocRecordType */:
+                    return 1 /* IsContainer */;
+                case 222 /* InterfaceDeclaration */:
+                    return 1 /* IsContainer */ | 64 /* IsInterface */;
+                case 269 /* JSDocFunctionType */:
+                case 225 /* ModuleDeclaration */:
+                case 223 /* TypeAliasDeclaration */:
+                    return 1 /* IsContainer */ | 32 /* HasLocals */;
+                case 256 /* SourceFile */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */;
+                case 148 /* Constructor */:
+                case 220 /* FunctionDeclaration */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 151 /* CallSignature */:
+                case 152 /* ConstructSignature */:
+                case 153 /* IndexSignature */:
+                case 156 /* FunctionType */:
+                case 157 /* ConstructorType */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */;
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */ | 16 /* IsFunctionExpression */;
+                case 226 /* ModuleBlock */:
+                    return 4 /* IsControlFlowContainer */;
+                case 145 /* PropertyDeclaration */:
+                    return node.initializer ? 4 /* IsControlFlowContainer */ : 0;
+                case 252 /* CatchClause */:
+                case 206 /* ForStatement */:
+                case 207 /* ForInStatement */:
+                case 208 /* ForOfStatement */:
+                case 227 /* CaseBlock */:
+                    return 2 /* IsBlockScopedContainer */;
+                case 199 /* Block */:
+                    // do not treat blocks directly inside a function as a block-scoped-container.
+                    // Locals that reside in this block should go to the function locals. Otherwise 'x'
+                    // would not appear to be a redeclaration of a block scoped local in the following
+                    // example:
+                    //
+                    //      function foo() {
+                    //          var x;
+                    //          let x;
+                    //      }
+                    //
+                    // If we placed 'var x' into the function locals and 'let x' into the locals of
+                    // the block, then there would be no collision.
+                    //
+                    // By not creating a new block-scoped-container here, we ensure that both 'var x'
+                    // and 'let x' go into the Function-container's locals, and we do get a collision
+                    // conflict.
+                    return ts.isFunctionLike(node.parent) ? 0 /* None */ : 2 /* IsBlockScopedContainer */;
+            }
+            return 0 /* None */;
+        }
+        function addToContainerChain(next) {
+            if (lastContainer) {
+                lastContainer.nextContainer = next;
+            }
+            lastContainer = next;
+        }
+        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
+            // Just call this directly so that the return type of this function stays "void".
+            return declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
+        }
+        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
+            switch (container.kind) {
+                // Modules, source files, and classes need specialized handling for how their
+                // members are declared (for example, a member of a class will go into a specific
+                // symbol table depending on if it is static or not). We defer to specialized
+                // handlers to take care of declaring these child members.
+                case 225 /* ModuleDeclaration */:
+                    return declareModuleMember(node, symbolFlags, symbolExcludes);
+                case 256 /* SourceFile */:
+                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
+                case 192 /* ClassExpression */:
+                case 221 /* ClassDeclaration */:
+                    return declareClassMember(node, symbolFlags, symbolExcludes);
+                case 224 /* EnumDeclaration */:
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                case 159 /* TypeLiteral */:
+                case 171 /* ObjectLiteralExpression */:
+                case 222 /* InterfaceDeclaration */:
+                case 265 /* JSDocRecordType */:
+                case 281 /* JSDocTypeLiteral */:
+                    // Interface/Object-types always have their children added to the 'members' of
+                    // their container. They are only accessible through an instance of their
+                    // container, and are never in scope otherwise (even inside the body of the
+                    // object / type / interface declaring them). An exception is type parameters,
+                    // which are in scope without qualification (similar to 'locals').
+                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+                case 156 /* FunctionType */:
+                case 157 /* ConstructorType */:
+                case 151 /* CallSignature */:
+                case 152 /* ConstructSignature */:
+                case 153 /* IndexSignature */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 148 /* Constructor */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                case 269 /* JSDocFunctionType */:
+                case 223 /* TypeAliasDeclaration */:
+                    // All the children of these container types are never visible through another
+                    // symbol (i.e. through another symbol's 'exports' or 'members').  Instead,
+                    // they're only accessed 'lexically' (i.e. from code that exists underneath
+                    // their container in the tree.  To accomplish this, we simply add their declared
+                    // symbol to the 'locals' of the container.  These symbols can then be found as
+                    // the type checker walks up the containers, checking them for matching names.
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+            }
+        }
+        function declareClassMember(node, symbolFlags, symbolExcludes) {
+            return node.flags & 32 /* Static */
+                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
+                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+        }
+        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
+            return ts.isExternalModule(file)
+                ? declareModuleMember(node, symbolFlags, symbolExcludes)
+                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
+        }
+        function hasExportDeclarations(node) {
+            var body = node.kind === 256 /* SourceFile */ ? node : node.body;
+            if (body.kind === 256 /* SourceFile */ || body.kind === 226 /* ModuleBlock */) {
+                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
+                    var stat = _a[_i];
+                    if (stat.kind === 236 /* ExportDeclaration */ || stat.kind === 235 /* ExportAssignment */) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function setExportContextFlag(node) {
+            // A declaration source file or ambient module declaration that contains no export declarations (but possibly regular
+            // declarations with export modifiers) is an export context in which declarations are implicitly exported.
+            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
+                node.flags |= 8192 /* ExportContext */;
+            }
+            else {
+                node.flags &= ~8192 /* ExportContext */;
+            }
+        }
+        function bindModuleDeclaration(node) {
+            setExportContextFlag(node);
+            if (ts.isAmbientModule(node)) {
+                if (node.flags & 1 /* Export */) {
+                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    declareSymbolAndAddToSymbolTable(node, 1024 /* NamespaceModule */, 0 /* NamespaceModuleExcludes */);
+                }
+                else {
+                    var pattern = void 0;
+                    if (node.name.kind === 9 /* StringLiteral */) {
+                        var text = node.name.text;
+                        if (ts.hasZeroOrOneAsteriskCharacter(text)) {
+                            pattern = ts.tryParsePattern(text);
+                        }
+                        else {
+                            errorOnFirstToken(node.name, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, text);
+                        }
+                    }
+                    var symbol = declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
+                    if (pattern) {
+                        (file.patternAmbientModules || (file.patternAmbientModules = [])).push({ pattern: pattern, symbol: symbol });
+                    }
+                }
+            }
+            else {
+                var state = getModuleInstanceState(node);
+                if (state === 0 /* NonInstantiated */) {
+                    declareSymbolAndAddToSymbolTable(node, 1024 /* NamespaceModule */, 0 /* NamespaceModuleExcludes */);
+                }
+                else {
+                    declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
+                    if (node.symbol.flags & (16 /* Function */ | 32 /* Class */ | 256 /* RegularEnum */)) {
+                        // if module was already merged with some function, class or non-const enum
+                        // treat is a non-const-enum-only
+                        node.symbol.constEnumOnlyModule = false;
+                    }
+                    else {
+                        var currentModuleIsConstEnumOnly = state === 2 /* ConstEnumOnly */;
+                        if (node.symbol.constEnumOnlyModule === undefined) {
+                            // non-merged case - use the current state
+                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
+                        }
+                        else {
+                            // merged case: module is const enum only if all its pieces are non-instantiated or const enum
+                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
+                        }
+                    }
+                }
+            }
+        }
+        function bindFunctionOrConstructorType(node) {
+            // For a given function symbol "<...>(...) => T" we want to generate a symbol identical
+            // to the one we would get for: { <...>(...): T }
+            //
+            // We do that by making an anonymous type literal symbol, and then setting the function
+            // symbol as its sole member. To the rest of the system, this symbol will be  indistinguishable
+            // from an actual type literal symbol you would have gotten had you used the long form.
+            var symbol = createSymbol(131072 /* Signature */, getDeclarationName(node));
+            addDeclarationToSymbol(symbol, node, 131072 /* Signature */);
+            var typeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type");
+            addDeclarationToSymbol(typeLiteralSymbol, node, 2048 /* TypeLiteral */);
+            typeLiteralSymbol.members = (_a = {}, _a[symbol.name] = symbol, _a);
+            var _a;
+        }
+        function bindObjectLiteralExpression(node) {
+            var ElementKind;
+            (function (ElementKind) {
+                ElementKind[ElementKind["Property"] = 1] = "Property";
+                ElementKind[ElementKind["Accessor"] = 2] = "Accessor";
+            })(ElementKind || (ElementKind = {}));
+            if (inStrictMode) {
+                var seen = {};
+                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (prop.name.kind !== 69 /* Identifier */) {
+                        continue;
+                    }
+                    var identifier = prop.name;
+                    // ECMA-262 11.1.5 Object Initializer
+                    // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
+                    // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
+                    // IsDataDescriptor(propId.descriptor) is true.
+                    //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
+                    //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
+                    //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
+                    // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
+                    var currentKind = prop.kind === 253 /* PropertyAssignment */ || prop.kind === 254 /* ShorthandPropertyAssignment */ || prop.kind === 147 /* MethodDeclaration */
+                        ? 1 /* Property */
+                        : 2 /* Accessor */;
+                    var existingKind = seen[identifier.text];
+                    if (!existingKind) {
+                        seen[identifier.text] = currentKind;
+                        continue;
+                    }
+                    if (currentKind === 1 /* Property */ && existingKind === 1 /* Property */) {
+                        var span = ts.getErrorSpanForNode(file, identifier);
+                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
+                    }
+                }
+            }
+            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__object");
+        }
+        function bindAnonymousDeclaration(node, symbolFlags, name) {
+            var symbol = createSymbol(symbolFlags, name);
+            addDeclarationToSymbol(symbol, node, symbolFlags);
+        }
+        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
+            switch (blockScopeContainer.kind) {
+                case 225 /* ModuleDeclaration */:
+                    declareModuleMember(node, symbolFlags, symbolExcludes);
+                    break;
+                case 256 /* SourceFile */:
+                    if (ts.isExternalModule(container)) {
+                        declareModuleMember(node, symbolFlags, symbolExcludes);
+                        break;
+                    }
+                // fall through.
+                default:
+                    if (!blockScopeContainer.locals) {
+                        blockScopeContainer.locals = {};
+                        addToContainerChain(blockScopeContainer);
+                    }
+                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
+            }
+        }
+        function bindBlockScopedVariableDeclaration(node) {
+            bindBlockScopedDeclaration(node, 2 /* BlockScopedVariable */, 107455 /* BlockScopedVariableExcludes */);
+        }
+        // The binder visits every node in the syntax tree so it is a convenient place to perform a single localized
+        // check for reserved words used as identifiers in strict mode code.
+        function checkStrictModeIdentifier(node) {
+            if (inStrictMode &&
+                node.originalKeywordKind >= 106 /* FirstFutureReservedWord */ &&
+                node.originalKeywordKind <= 114 /* LastFutureReservedWord */ &&
+                !ts.isIdentifierName(node) &&
+                !ts.isInAmbientContext(node)) {
+                // Report error only if there are no parse errors in file
+                if (!file.parseDiagnostics.length) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
+                }
+            }
+        }
+        function getStrictModeIdentifierMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
+        }
+        function checkStrictModeBinaryExpression(node) {
+            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
+                // ECMA 262 (Annex C) The identifier eval or arguments may not appear as the LeftHandSideExpression of an
+                // Assignment operator(11.13) or of a PostfixExpression(11.3)
+                checkStrictModeEvalOrArguments(node, node.left);
+            }
+        }
+        function checkStrictModeCatchClause(node) {
+            // It is a SyntaxError if a TryStatement with a Catch occurs within strict code and the Identifier of the
+            // Catch production is eval or arguments
+            if (inStrictMode && node.variableDeclaration) {
+                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
+            }
+        }
+        function checkStrictModeDeleteExpression(node) {
+            // Grammar checking
+            if (inStrictMode && node.expression.kind === 69 /* Identifier */) {
+                // When a delete operator occurs within strict mode code, a SyntaxError is thrown if its
+                // UnaryExpression is a direct reference to a variable, function argument, or function name
+                var span = ts.getErrorSpanForNode(file, node.expression);
+                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
+            }
+        }
+        function isEvalOrArgumentsIdentifier(node) {
+            return node.kind === 69 /* Identifier */ &&
+                (node.text === "eval" || node.text === "arguments");
+        }
+        function checkStrictModeEvalOrArguments(contextNode, name) {
+            if (name && name.kind === 69 /* Identifier */) {
+                var identifier = name;
+                if (isEvalOrArgumentsIdentifier(identifier)) {
+                    // We check first if the name is inside class declaration or class expression; if so give explicit message
+                    // otherwise report generic error message.
+                    var span = ts.getErrorSpanForNode(file, name);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
+                }
+            }
+        }
+        function getStrictModeEvalOrArgumentsMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
+        }
+        function checkStrictModeFunctionName(node) {
+            if (inStrictMode) {
+                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a strict mode FunctionDeclaration or FunctionExpression (13.1))
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+        }
+        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
+        }
+        function checkStrictModeFunctionDeclaration(node) {
+            if (languageVersion < 2 /* ES6 */) {
+                // Report error if function is not top level function declaration
+                if (blockScopeContainer.kind !== 256 /* SourceFile */ &&
+                    blockScopeContainer.kind !== 225 /* ModuleDeclaration */ &&
+                    !ts.isFunctionLike(blockScopeContainer)) {
+                    // We check first if the name is inside class declaration or class expression; if so give explicit message
+                    // otherwise report generic error message.
+                    var errorSpan = ts.getErrorSpanForNode(file, node);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
+                }
+            }
+        }
+        function checkStrictModeNumericLiteral(node) {
+            if (inStrictMode && node.isOctalLiteral) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
+            }
+        }
+        function checkStrictModePostfixUnaryExpression(node) {
+            // Grammar checking
+            // The identifier eval or arguments may not appear as the LeftHandSideExpression of an
+            // Assignment operator(11.13) or of a PostfixExpression(11.3) or as the UnaryExpression
+            // operated upon by a Prefix Increment(11.4.4) or a Prefix Decrement(11.4.5) operator.
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.operand);
+            }
+        }
+        function checkStrictModePrefixUnaryExpression(node) {
+            // Grammar checking
+            if (inStrictMode) {
+                if (node.operator === 41 /* PlusPlusToken */ || node.operator === 42 /* MinusMinusToken */) {
+                    checkStrictModeEvalOrArguments(node, node.operand);
+                }
+            }
+        }
+        function checkStrictModeWithStatement(node) {
+            // Grammar checking for withStatement
+            if (inStrictMode) {
+                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
+            }
+        }
+        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
+            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
+        }
+        function getDestructuringParameterName(node) {
+            return "__" + ts.indexOf(node.parent.parameters, node);
+        }
+        function bind(node) {
+            if (!node) {
+                return;
+            }
+            node.parent = parent;
+            var saveInStrictMode = inStrictMode;
+            // First we bind declaration nodes to a symbol if possible. We'll both create a symbol
+            // and then potentially add the symbol to an appropriate symbol table. Possible
+            // destination symbol tables are:
+            //
+            //  1) The 'exports' table of the current container's symbol.
+            //  2) The 'members' table of the current container's symbol.
+            //  3) The 'locals' table of the current container.
+            //
+            // However, not all symbols will end up in any of these tables. 'Anonymous' symbols
+            // (like TypeLiterals for example) will not be put in any table.
+            bindWorker(node);
+            // Then we recurse into the children of the node to bind them as well. For certain
+            // symbols we do specialized work when we recurse. For example, we'll keep track of
+            // the current 'container' node when it changes. This helps us know which symbol table
+            // a local should go into for example. Since terminal nodes are known not to have
+            // children, as an optimization we don't process those.
+            if (node.kind > 138 /* LastToken */) {
+                var saveParent = parent;
+                parent = node;
+                var containerFlags = getContainerFlags(node);
+                if (containerFlags === 0 /* None */) {
+                    bindChildren(node);
+                }
+                else {
+                    bindContainer(node, containerFlags);
+                }
+                parent = saveParent;
+            }
+            inStrictMode = saveInStrictMode;
+        }
+        function updateStrictModeStatementList(statements) {
+            if (!inStrictMode) {
+                for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
+                    var statement = statements_1[_i];
+                    if (!ts.isPrologueDirective(statement)) {
+                        return;
+                    }
+                    if (isUseStrictPrologueDirective(statement)) {
+                        inStrictMode = true;
+                        return;
+                    }
+                }
+            }
+        }
+        /// Should be called only on prologue directives (isPrologueDirective(node) should be true)
+        function isUseStrictPrologueDirective(node) {
+            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
+            // Note: the node text must be exactly "use strict" or 'use strict'.  It is not ok for the
+            // string to contain unicode escapes (as per ES5).
+            return nodeText === '"use strict"' || nodeText === "'use strict'";
+        }
+        function bindWorker(node) {
+            switch (node.kind) {
+                /* Strict mode checks */
+                case 69 /* Identifier */:
+                case 97 /* ThisKeyword */:
+                    if (currentFlow && (ts.isExpression(node) || parent.kind === 254 /* ShorthandPropertyAssignment */)) {
+                        node.flowNode = currentFlow;
+                    }
+                    return checkStrictModeIdentifier(node);
+                case 172 /* PropertyAccessExpression */:
+                    if (currentFlow && isNarrowableReference(node)) {
+                        node.flowNode = currentFlow;
+                    }
+                    break;
+                case 187 /* BinaryExpression */:
+                    if (ts.isInJavaScriptFile(node)) {
+                        var specialKind = ts.getSpecialPropertyAssignmentKind(node);
+                        switch (specialKind) {
+                            case 1 /* ExportsProperty */:
+                                bindExportsPropertyAssignment(node);
+                                break;
+                            case 2 /* ModuleExports */:
+                                bindModuleExportsAssignment(node);
+                                break;
+                            case 3 /* PrototypeProperty */:
+                                bindPrototypePropertyAssignment(node);
+                                break;
+                            case 4 /* ThisProperty */:
+                                bindThisPropertyAssignment(node);
+                                break;
+                            case 0 /* None */:
+                                // Nothing to do
+                                break;
+                            default:
+                                ts.Debug.fail("Unknown special property assignment kind");
+                        }
+                    }
+                    return checkStrictModeBinaryExpression(node);
+                case 252 /* CatchClause */:
+                    return checkStrictModeCatchClause(node);
+                case 181 /* DeleteExpression */:
+                    return checkStrictModeDeleteExpression(node);
+                case 8 /* NumericLiteral */:
+                    return checkStrictModeNumericLiteral(node);
+                case 186 /* PostfixUnaryExpression */:
+                    return checkStrictModePostfixUnaryExpression(node);
+                case 185 /* PrefixUnaryExpression */:
+                    return checkStrictModePrefixUnaryExpression(node);
+                case 212 /* WithStatement */:
+                    return checkStrictModeWithStatement(node);
+                case 165 /* ThisType */:
+                    seenThisKeyword = true;
+                    return;
+                case 154 /* TypePredicate */:
+                    return checkTypePredicate(node);
+                case 141 /* TypeParameter */:
+                    return declareSymbolAndAddToSymbolTable(node, 262144 /* TypeParameter */, 530912 /* TypeParameterExcludes */);
+                case 142 /* Parameter */:
+                    return bindParameter(node);
+                case 218 /* VariableDeclaration */:
+                case 169 /* BindingElement */:
+                    return bindVariableDeclarationOrBindingElement(node);
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 266 /* JSDocRecordMember */:
+                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
+                case 280 /* JSDocPropertyTag */:
+                    return bindJSDocProperty(node);
+                case 253 /* PropertyAssignment */:
+                case 254 /* ShorthandPropertyAssignment */:
+                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* PropertyExcludes */);
+                case 255 /* EnumMember */:
+                    return bindPropertyOrMethodOrAccessor(node, 8 /* EnumMember */, 107455 /* EnumMemberExcludes */);
+                case 247 /* JsxSpreadAttribute */:
+                    emitFlags |= 1073741824 /* HasJsxSpreadAttribute */;
+                    return;
+                case 151 /* CallSignature */:
+                case 152 /* ConstructSignature */:
+                case 153 /* IndexSignature */:
+                    return declareSymbolAndAddToSymbolTable(node, 131072 /* Signature */, 0 /* None */);
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                    // If this is an ObjectLiteralExpression method, then it sits in the same space
+                    // as other properties in the object literal.  So we use SymbolFlags.PropertyExcludes
+                    // so that it will conflict with any other object literal members with the same
+                    // name.
+                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 0 /* PropertyExcludes */ : 99263 /* MethodExcludes */);
+                case 220 /* FunctionDeclaration */:
+                    return bindFunctionDeclaration(node);
+                case 148 /* Constructor */:
+                    return declareSymbolAndAddToSymbolTable(node, 16384 /* Constructor */, /*symbolExcludes:*/ 0 /* None */);
+                case 149 /* GetAccessor */:
+                    return bindPropertyOrMethodOrAccessor(node, 32768 /* GetAccessor */, 41919 /* GetAccessorExcludes */);
+                case 150 /* SetAccessor */:
+                    return bindPropertyOrMethodOrAccessor(node, 65536 /* SetAccessor */, 74687 /* SetAccessorExcludes */);
+                case 156 /* FunctionType */:
+                case 157 /* ConstructorType */:
+                case 269 /* JSDocFunctionType */:
+                    return bindFunctionOrConstructorType(node);
+                case 159 /* TypeLiteral */:
+                case 281 /* JSDocTypeLiteral */:
+                case 265 /* JSDocRecordType */:
+                    return bindAnonymousDeclaration(node, 2048 /* TypeLiteral */, "__type");
+                case 171 /* ObjectLiteralExpression */:
+                    return bindObjectLiteralExpression(node);
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    return bindFunctionExpression(node);
+                case 174 /* CallExpression */:
+                    if (ts.isInJavaScriptFile(node)) {
+                        bindCallExpression(node);
+                    }
+                    break;
+                // Members of classes, interfaces, and modules
+                case 192 /* ClassExpression */:
+                case 221 /* ClassDeclaration */:
+                    // All classes are automatically in strict mode in ES6.
+                    inStrictMode = true;
+                    return bindClassLikeDeclaration(node);
+                case 222 /* InterfaceDeclaration */:
+                    return bindBlockScopedDeclaration(node, 64 /* Interface */, 792960 /* InterfaceExcludes */);
+                case 279 /* JSDocTypedefTag */:
+                case 223 /* TypeAliasDeclaration */:
+                    return bindBlockScopedDeclaration(node, 524288 /* TypeAlias */, 793056 /* TypeAliasExcludes */);
+                case 224 /* EnumDeclaration */:
+                    return bindEnumDeclaration(node);
+                case 225 /* ModuleDeclaration */:
+                    return bindModuleDeclaration(node);
+                // Imports and exports
+                case 229 /* ImportEqualsDeclaration */:
+                case 232 /* NamespaceImport */:
+                case 234 /* ImportSpecifier */:
+                case 238 /* ExportSpecifier */:
+                    return declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
+                case 228 /* NamespaceExportDeclaration */:
+                    return bindNamespaceExportDeclaration(node);
+                case 231 /* ImportClause */:
+                    return bindImportClause(node);
+                case 236 /* ExportDeclaration */:
+                    return bindExportDeclaration(node);
+                case 235 /* ExportAssignment */:
+                    return bindExportAssignment(node);
+                case 256 /* SourceFile */:
+                    updateStrictModeStatementList(node.statements);
+                    return bindSourceFileIfExternalModule();
+                case 199 /* Block */:
+                    if (!ts.isFunctionLike(node.parent)) {
+                        return;
+                    }
+                // Fall through
+                case 226 /* ModuleBlock */:
+                    return updateStrictModeStatementList(node.statements);
+            }
+        }
+        function checkTypePredicate(node) {
+            var parameterName = node.parameterName, type = node.type;
+            if (parameterName && parameterName.kind === 69 /* Identifier */) {
+                checkStrictModeIdentifier(parameterName);
+            }
+            if (parameterName && parameterName.kind === 165 /* ThisType */) {
+                seenThisKeyword = true;
+            }
+            bind(type);
+        }
+        function bindSourceFileIfExternalModule() {
+            setExportContextFlag(file);
+            if (ts.isExternalModule(file)) {
+                bindSourceFileAsExternalModule();
+            }
+        }
+        function bindSourceFileAsExternalModule() {
+            bindAnonymousDeclaration(file, 512 /* ValueModule */, "\"" + ts.removeFileExtension(file.fileName) + "\"");
+        }
+        function bindExportAssignment(node) {
+            var boundExpression = node.kind === 235 /* ExportAssignment */ ? node.expression : node.right;
+            if (!container.symbol || !container.symbol.exports) {
+                // Export assignment in some sort of block construct
+                bindAnonymousDeclaration(node, 8388608 /* Alias */, getDeclarationName(node));
+            }
+            else if (boundExpression.kind === 69 /* Identifier */ && node.kind === 235 /* ExportAssignment */) {
+                // An export default clause with an identifier exports all meanings of that identifier
+                declareSymbol(container.symbol.exports, container.symbol, node, 8388608 /* Alias */, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
+            }
+            else {
+                // An export default clause with an expression exports a value
+                declareSymbol(container.symbol.exports, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
+            }
+        }
+        function bindNamespaceExportDeclaration(node) {
+            if (node.modifiers && node.modifiers.length) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
+            }
+            if (node.parent.kind !== 256 /* SourceFile */) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
+                return;
+            }
+            else {
+                var parent_6 = node.parent;
+                if (!ts.isExternalModule(parent_6)) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
+                    return;
+                }
+                if (!parent_6.isDeclarationFile) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
+                    return;
+                }
+            }
+            file.symbol.globalExports = file.symbol.globalExports || {};
+            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
+        }
+        function bindExportDeclaration(node) {
+            if (!container.symbol || !container.symbol.exports) {
+                // Export * in some sort of block construct
+                bindAnonymousDeclaration(node, 1073741824 /* ExportStar */, getDeclarationName(node));
+            }
+            else if (!node.exportClause) {
+                // All export * declarations are collected in an __export symbol
+                declareSymbol(container.symbol.exports, container.symbol, node, 1073741824 /* ExportStar */, 0 /* None */);
+            }
+        }
+        function bindImportClause(node) {
+            if (node.name) {
+                declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
+            }
+        }
+        function setCommonJsModuleIndicator(node) {
+            if (!file.commonJsModuleIndicator) {
+                file.commonJsModuleIndicator = node;
+                bindSourceFileAsExternalModule();
+            }
+        }
+        function bindExportsPropertyAssignment(node) {
+            // When we create a property via 'exports.foo = bar', the 'exports.foo' property access
+            // expression is the declaration
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 /* Property */ | 7340032 /* Export */, 0 /* None */);
+        }
+        function bindModuleExportsAssignment(node) {
+            // 'module.exports = expr' assignment
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node, 4 /* Property */ | 7340032 /* Export */ | 512 /* ValueModule */, 0 /* None */);
+        }
+        function bindThisPropertyAssignment(node) {
+            // Declare a 'member' in case it turns out the container was an ES5 class or ES6 constructor
+            var assignee;
+            if (container.kind === 220 /* FunctionDeclaration */ || container.kind === 220 /* FunctionDeclaration */) {
+                assignee = container;
+            }
+            else if (container.kind === 148 /* Constructor */) {
+                assignee = container.parent;
+            }
+            else {
+                return;
+            }
+            assignee.symbol.members = assignee.symbol.members || {};
+            // It's acceptable for multiple 'this' assignments of the same identifier to occur
+            declareSymbol(assignee.symbol.members, assignee.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ & ~4 /* Property */);
+        }
+        function bindPrototypePropertyAssignment(node) {
+            // We saw a node of the form 'x.prototype.y = z'. Declare a 'member' y on x if x was a function.
+            // Look up the function in the local scope, since prototype assignments should
+            // follow the function declaration
+            var leftSideOfAssignment = node.left;
+            var classPrototype = leftSideOfAssignment.expression;
+            var constructorFunction = classPrototype.expression;
+            // Fix up parent pointers since we're going to use these nodes before we bind into them
+            leftSideOfAssignment.parent = node;
+            constructorFunction.parent = classPrototype;
+            classPrototype.parent = leftSideOfAssignment;
+            var funcSymbol = container.locals[constructorFunction.text];
+            if (!funcSymbol || !(funcSymbol.flags & 16 /* Function */)) {
+                return;
+            }
+            // Set up the members collection if it doesn't exist already
+            if (!funcSymbol.members) {
+                funcSymbol.members = {};
+            }
+            // Declare the method/property
+            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4 /* Property */, 0 /* PropertyExcludes */);
+        }
+        function bindCallExpression(node) {
+            // We're only inspecting call expressions to detect CommonJS modules, so we can skip
+            // this check if we've already seen the module indicator
+            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ false)) {
+                setCommonJsModuleIndicator(node);
+            }
+        }
+        function bindClassLikeDeclaration(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.getClassExtendsHeritageClauseElement(node) !== undefined) {
+                    emitFlags |= 262144 /* HasClassExtends */;
+                }
+                if (ts.nodeIsDecorated(node)) {
+                    emitFlags |= 524288 /* HasDecorators */;
+                }
+            }
+            if (node.kind === 221 /* ClassDeclaration */) {
+                bindBlockScopedDeclaration(node, 32 /* Class */, 899519 /* ClassExcludes */);
+            }
+            else {
+                var bindingName = node.name ? node.name.text : "__class";
+                bindAnonymousDeclaration(node, 32 /* Class */, bindingName);
+                // Add name of class expression into the map for semantic classifier
+                if (node.name) {
+                    classifiableNames[node.name.text] = node.name.text;
+                }
+            }
+            var symbol = node.symbol;
+            // TypeScript 1.0 spec (April 2014): 8.4
+            // Every class automatically contains a static property member named 'prototype', the
+            // type of which is an instantiation of the class type with type Any supplied as a type
+            // argument for each type parameter. It is an error to explicitly declare a static
+            // property member with the name 'prototype'.
+            //
+            // Note: we check for this here because this class may be merging into a module.  The
+            // module might have an exported variable called 'prototype'.  We can't allow that as
+            // that would clash with the built-in 'prototype' for the class.
+            var prototypeSymbol = createSymbol(4 /* Property */ | 134217728 /* Prototype */, "prototype");
+            if (ts.hasProperty(symbol.exports, prototypeSymbol.name)) {
+                if (node.name) {
+                    node.name.parent = node;
+                }
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
+            }
+            symbol.exports[prototypeSymbol.name] = prototypeSymbol;
+            prototypeSymbol.parent = symbol;
+        }
+        function bindEnumDeclaration(node) {
+            return ts.isConst(node)
+                ? bindBlockScopedDeclaration(node, 128 /* ConstEnum */, 899967 /* ConstEnumExcludes */)
+                : bindBlockScopedDeclaration(node, 256 /* RegularEnum */, 899327 /* RegularEnumExcludes */);
+        }
+        function bindVariableDeclarationOrBindingElement(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (!ts.isBindingPattern(node.name)) {
+                if (ts.isBlockOrCatchScoped(node)) {
+                    bindBlockScopedVariableDeclaration(node);
+                }
+                else if (ts.isParameterDeclaration(node)) {
+                    // It is safe to walk up parent chain to find whether the node is a destructing parameter declaration
+                    // because its parent chain has already been set up, since parents are set before descending into children.
+                    //
+                    // If node is a binding element in parameter declaration, we need to use ParameterExcludes.
+                    // Using ParameterExcludes flag allows the compiler to report an error on duplicate identifiers in Parameter Declaration
+                    // For example:
+                    //      function foo([a,a]) {} // Duplicate Identifier error
+                    //      function bar(a,a) {}   // Duplicate Identifier error, parameter declaration in this case is handled in bindParameter
+                    //                             // which correctly set excluded symbols
+                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
+                }
+                else {
+                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107454 /* FunctionScopedVariableExcludes */);
+                }
+            }
+        }
+        function bindParameter(node) {
+            if (!ts.isDeclarationFile(file) &&
+                !ts.isInAmbientContext(node) &&
+                ts.nodeIsDecorated(node)) {
+                emitFlags |= (524288 /* HasDecorators */ | 1048576 /* HasParamDecorators */);
+            }
+            if (inStrictMode) {
+                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a
+                // strict mode FunctionLikeDeclaration or FunctionExpression(13.1)
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (ts.isBindingPattern(node.name)) {
+                bindAnonymousDeclaration(node, 1 /* FunctionScopedVariable */, getDestructuringParameterName(node));
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
+            }
+            // If this is a property-parameter, then also declare the property symbol into the
+            // containing class.
+            if (ts.isParameterPropertyDeclaration(node)) {
+                var classDeclaration = node.parent.parent;
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
+            }
+        }
+        function bindFunctionDeclaration(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152 /* HasAsyncFunctions */;
+                }
+            }
+            checkStrictModeFunctionName(node);
+            if (inStrictMode) {
+                checkStrictModeFunctionDeclaration(node);
+                bindBlockScopedDeclaration(node, 16 /* Function */, 106927 /* FunctionExcludes */);
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 16 /* Function */, 106927 /* FunctionExcludes */);
+            }
+        }
+        function bindFunctionExpression(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152 /* HasAsyncFunctions */;
+                }
+            }
+            if (currentFlow) {
+                node.flowNode = currentFlow;
+            }
+            checkStrictModeFunctionName(node);
+            var bindingName = node.name ? node.name.text : "__function";
+            return bindAnonymousDeclaration(node, 16 /* Function */, bindingName);
+        }
+        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152 /* HasAsyncFunctions */;
+                }
+                if (ts.nodeIsDecorated(node)) {
+                    emitFlags |= 524288 /* HasDecorators */;
+                }
+            }
+            return ts.hasDynamicName(node)
+                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
+                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
+        }
+        function bindJSDocProperty(node) {
+            return declareSymbolAndAddToSymbolTable(node, 4 /* Property */, 0 /* PropertyExcludes */);
+        }
+        // reachability checks
+        function shouldReportErrorOnModuleDeclaration(node) {
+            var instanceState = getModuleInstanceState(node);
+            return instanceState === 1 /* Instantiated */ || (instanceState === 2 /* ConstEnumOnly */ && options.preserveConstEnums);
+        }
+        function checkUnreachable(node) {
+            if (!(currentFlow.flags & 1 /* Unreachable */)) {
+                return false;
+            }
+            if (currentFlow === unreachableFlow) {
+                var reportError = 
+                // report error on all statements except empty ones
+                (ts.isStatement(node) && node.kind !== 201 /* EmptyStatement */) ||
+                    // report error on class declarations
+                    node.kind === 221 /* ClassDeclaration */ ||
+                    // report error on instantiated modules or const-enums only modules if preserveConstEnums is set
+                    (node.kind === 225 /* ModuleDeclaration */ && shouldReportErrorOnModuleDeclaration(node)) ||
+                    // report error on regular enums and const enums if preserveConstEnums is set
+                    (node.kind === 224 /* EnumDeclaration */ && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
+                if (reportError) {
+                    currentFlow = reportedUnreachableFlow;
+                    // unreachable code is reported if
+                    // - user has explicitly asked about it AND
+                    // - statement is in not ambient context (statements in ambient context is already an error
+                    //   so we should not report extras) AND
+                    //   - node is not variable statement OR
+                    //   - node is block scoped variable statement OR
+                    //   - node is not block scoped variable statement and at least one variable declaration has initializer
+                    //   Rationale: we don't want to report errors on non-initialized var's since they are hoisted
+                    //   On the other side we do want to report errors on non-initialized 'lets' because of TDZ
+                    var reportUnreachableCode = !options.allowUnreachableCode &&
+                        !ts.isInAmbientContext(node) &&
+                        (node.kind !== 200 /* VariableStatement */ ||
+                            ts.getCombinedNodeFlags(node.declarationList) & 3072 /* BlockScoped */ ||
+                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
+                    if (reportUnreachableCode) {
+                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
+                    }
+                }
+            }
+            return true;
+        }
+    }
+})(ts || (ts = {}));
+/// <reference path="binder.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var nextSymbolId = 1;
+    var nextNodeId = 1;
+    var nextMergeId = 1;
+    var nextFlowId = 1;
+    function getNodeId(node) {
+        if (!node.id) {
+            node.id = nextNodeId;
+            nextNodeId++;
+        }
+        return node.id;
+    }
+    ts.getNodeId = getNodeId;
+    ts.checkTime = 0;
+    function getSymbolId(symbol) {
+        if (!symbol.id) {
+            symbol.id = nextSymbolId;
+            nextSymbolId++;
+        }
+        return symbol.id;
+    }
+    ts.getSymbolId = getSymbolId;
+    function createTypeChecker(host, produceDiagnostics) {
+        // Cancellation that controls whether or not we can cancel in the middle of type checking.
+        // In general cancelling is *not* safe for the type checker.  We might be in the middle of
+        // computing something, and we will leave our internals in an inconsistent state.  Callers
+        // who set the cancellation token should catch if a cancellation exception occurs, and
+        // should throw away and create a new TypeChecker.
+        //
+        // Currently we only support setting the cancellation token when getting diagnostics.  This
+        // is because diagnostics can be quite expensive, and we want to allow hosts to bail out if
+        // they no longer need the information (for example, if the user started editing again).
+        var cancellationToken;
+        var Symbol = ts.objectAllocator.getSymbolConstructor();
+        var Type = ts.objectAllocator.getTypeConstructor();
+        var Signature = ts.objectAllocator.getSignatureConstructor();
+        var typeCount = 0;
+        var symbolCount = 0;
+        var emptyArray = [];
+        var emptySymbols = {};
+        var compilerOptions = host.getCompilerOptions();
+        var languageVersion = compilerOptions.target || 0 /* ES3 */;
+        var modulekind = ts.getEmitModuleKind(compilerOptions);
+        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
+        var strictNullChecks = compilerOptions.strictNullChecks;
+        var emitResolver = createResolver();
+        var undefinedSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "undefined");
+        undefinedSymbol.declarations = [];
+        var argumentsSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "arguments");
+        var checker = {
+            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
+            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
+            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
+            getTypeCount: function () { return typeCount; },
+            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
+            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
+            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
+            getDiagnostics: getDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getTypeOfSymbolAtLocation: getTypeOfSymbolAtLocation,
+            getSymbolsOfParameterPropertyDeclaration: getSymbolsOfParameterPropertyDeclaration,
+            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
+            getPropertiesOfType: getPropertiesOfType,
+            getPropertyOfType: getPropertyOfType,
+            getSignaturesOfType: getSignaturesOfType,
+            getIndexTypeOfType: getIndexTypeOfType,
+            getBaseTypes: getBaseTypes,
+            getReturnTypeOfSignature: getReturnTypeOfSignature,
+            getNonNullableType: getNonNullableType,
+            getSymbolsInScope: getSymbolsInScope,
+            getSymbolAtLocation: getSymbolAtLocation,
+            getShorthandAssignmentValueSymbol: getShorthandAssignmentValueSymbol,
+            getExportSpecifierLocalTargetSymbol: getExportSpecifierLocalTargetSymbol,
+            getTypeAtLocation: getTypeOfNode,
+            getPropertySymbolOfDestructuringAssignment: getPropertySymbolOfDestructuringAssignment,
+            typeToString: typeToString,
+            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
+            symbolToString: symbolToString,
+            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
+            getRootSymbols: getRootSymbols,
+            getContextualType: getContextualType,
+            getFullyQualifiedName: getFullyQualifiedName,
+            getResolvedSignature: getResolvedSignature,
+            getConstantValue: getConstantValue,
+            isValidPropertyAccess: isValidPropertyAccess,
+            getSignatureFromDeclaration: getSignatureFromDeclaration,
+            isImplementationOfOverload: isImplementationOfOverload,
+            getAliasedSymbol: resolveAlias,
+            getEmitResolver: getEmitResolver,
+            getExportsOfModule: getExportsOfModuleAsArray,
+            getJsxElementAttributesType: getJsxElementAttributesType,
+            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
+            isOptionalParameter: isOptionalParameter
+        };
+        var unknownSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "unknown");
+        var resolvingSymbol = createSymbol(67108864 /* Transient */, "__resolving__");
+        var anyType = createIntrinsicType(1 /* Any */, "any");
+        var stringType = createIntrinsicType(2 /* String */, "string");
+        var numberType = createIntrinsicType(4 /* Number */, "number");
+        var booleanType = createIntrinsicType(8 /* Boolean */, "boolean");
+        var esSymbolType = createIntrinsicType(16777216 /* ESSymbol */, "symbol");
+        var voidType = createIntrinsicType(16 /* Void */, "void");
+        var undefinedType = createIntrinsicType(32 /* Undefined */, "undefined");
+        var undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(32 /* Undefined */ | 2097152 /* ContainsWideningType */, "undefined");
+        var nullType = createIntrinsicType(64 /* Null */, "null");
+        var nullWideningType = strictNullChecks ? nullType : createIntrinsicType(64 /* Null */ | 2097152 /* ContainsWideningType */, "null");
+        var unknownType = createIntrinsicType(1 /* Any */, "unknown");
+        var neverType = createIntrinsicType(134217728 /* Never */, "never");
+        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        emptyGenericType.instantiations = {};
+        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        // The anyFunctionType contains the anyFunctionType by definition. The flag is further propagated
+        // in getPropagatingFlagsOfTypes, and it is checked in inferFromTypes.
+        anyFunctionType.flags |= 8388608 /* ContainsAnyFunctionType */;
+        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasStringLiterals*/ false);
+        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasStringLiterals*/ false);
+        var enumNumberIndexInfo = createIndexInfo(stringType, /*isReadonly*/ true);
+        var globals = {};
+        /**
+         * List of every ambient module with a "*" wildcard.
+         * Unlike other ambient modules, these can't be stored in `globals` because symbol tables only deal with exact matches.
+         * This is only used if there is no exact match.
+        */
+        var patternAmbientModules;
+        var getGlobalESSymbolConstructorSymbol;
+        var getGlobalPromiseConstructorSymbol;
+        var globalObjectType;
+        var globalFunctionType;
+        var globalArrayType;
+        var globalReadonlyArrayType;
+        var globalStringType;
+        var globalNumberType;
+        var globalBooleanType;
+        var globalRegExpType;
+        var anyArrayType;
+        var anyReadonlyArrayType;
+        // The library files are only loaded when the feature is used.
+        // This allows users to just specify library files they want to used through --lib
+        // and they will not get an error from not having unrelated library files
+        var getGlobalTemplateStringsArrayType;
+        var getGlobalESSymbolType;
+        var getGlobalIterableType;
+        var getGlobalIteratorType;
+        var getGlobalIterableIteratorType;
+        var getGlobalClassDecoratorType;
+        var getGlobalParameterDecoratorType;
+        var getGlobalPropertyDecoratorType;
+        var getGlobalMethodDecoratorType;
+        var getGlobalTypedPropertyDescriptorType;
+        var getGlobalPromiseType;
+        var tryGetGlobalPromiseType;
+        var getGlobalPromiseLikeType;
+        var getInstantiatedGlobalPromiseLikeType;
+        var getGlobalPromiseConstructorLikeType;
+        var getGlobalThenableType;
+        var jsxElementClassType;
+        var deferredNodes;
+        var flowLoopStart = 0;
+        var flowLoopCount = 0;
+        var visitedFlowCount = 0;
+        var tupleTypes = {};
+        var unionTypes = {};
+        var intersectionTypes = {};
+        var stringLiteralTypes = {};
+        var resolutionTargets = [];
+        var resolutionResults = [];
+        var resolutionPropertyNames = [];
+        var mergedSymbols = [];
+        var symbolLinks = [];
+        var nodeLinks = [];
+        var flowLoopCaches = [];
+        var flowLoopNodes = [];
+        var flowLoopKeys = [];
+        var flowLoopTypes = [];
+        var visitedFlowNodes = [];
+        var visitedFlowTypes = [];
+        var potentialThisCollisions = [];
+        var awaitedTypeStack = [];
+        var diagnostics = ts.createDiagnosticCollection();
+        var TypeFacts;
+        (function (TypeFacts) {
+            TypeFacts[TypeFacts["None"] = 0] = "None";
+            TypeFacts[TypeFacts["TypeofEQString"] = 1] = "TypeofEQString";
+            TypeFacts[TypeFacts["TypeofEQNumber"] = 2] = "TypeofEQNumber";
+            TypeFacts[TypeFacts["TypeofEQBoolean"] = 4] = "TypeofEQBoolean";
+            TypeFacts[TypeFacts["TypeofEQSymbol"] = 8] = "TypeofEQSymbol";
+            TypeFacts[TypeFacts["TypeofEQObject"] = 16] = "TypeofEQObject";
+            TypeFacts[TypeFacts["TypeofEQFunction"] = 32] = "TypeofEQFunction";
+            TypeFacts[TypeFacts["TypeofEQHostObject"] = 64] = "TypeofEQHostObject";
+            TypeFacts[TypeFacts["TypeofNEString"] = 128] = "TypeofNEString";
+            TypeFacts[TypeFacts["TypeofNENumber"] = 256] = "TypeofNENumber";
+            TypeFacts[TypeFacts["TypeofNEBoolean"] = 512] = "TypeofNEBoolean";
+            TypeFacts[TypeFacts["TypeofNESymbol"] = 1024] = "TypeofNESymbol";
+            TypeFacts[TypeFacts["TypeofNEObject"] = 2048] = "TypeofNEObject";
+            TypeFacts[TypeFacts["TypeofNEFunction"] = 4096] = "TypeofNEFunction";
+            TypeFacts[TypeFacts["TypeofNEHostObject"] = 8192] = "TypeofNEHostObject";
+            TypeFacts[TypeFacts["EQUndefined"] = 16384] = "EQUndefined";
+            TypeFacts[TypeFacts["EQNull"] = 32768] = "EQNull";
+            TypeFacts[TypeFacts["EQUndefinedOrNull"] = 65536] = "EQUndefinedOrNull";
+            TypeFacts[TypeFacts["NEUndefined"] = 131072] = "NEUndefined";
+            TypeFacts[TypeFacts["NENull"] = 262144] = "NENull";
+            TypeFacts[TypeFacts["NEUndefinedOrNull"] = 524288] = "NEUndefinedOrNull";
+            TypeFacts[TypeFacts["Truthy"] = 1048576] = "Truthy";
+            TypeFacts[TypeFacts["Falsy"] = 2097152] = "Falsy";
+            TypeFacts[TypeFacts["All"] = 4194303] = "All";
+            // The following members encode facts about particular kinds of types for use in the getTypeFacts function.
+            // The presence of a particular fact means that the given test is true for some (and possibly all) values
+            // of that kind of type.
+            TypeFacts[TypeFacts["StringStrictFacts"] = 4079361] = "StringStrictFacts";
+            TypeFacts[TypeFacts["StringFacts"] = 4194049] = "StringFacts";
+            TypeFacts[TypeFacts["NumberStrictFacts"] = 4079234] = "NumberStrictFacts";
+            TypeFacts[TypeFacts["NumberFacts"] = 4193922] = "NumberFacts";
+            TypeFacts[TypeFacts["BooleanStrictFacts"] = 4078980] = "BooleanStrictFacts";
+            TypeFacts[TypeFacts["BooleanFacts"] = 4193668] = "BooleanFacts";
+            TypeFacts[TypeFacts["SymbolStrictFacts"] = 1981320] = "SymbolStrictFacts";
+            TypeFacts[TypeFacts["SymbolFacts"] = 4193160] = "SymbolFacts";
+            TypeFacts[TypeFacts["ObjectStrictFacts"] = 1972176] = "ObjectStrictFacts";
+            TypeFacts[TypeFacts["ObjectFacts"] = 4184016] = "ObjectFacts";
+            TypeFacts[TypeFacts["FunctionStrictFacts"] = 1970144] = "FunctionStrictFacts";
+            TypeFacts[TypeFacts["FunctionFacts"] = 4181984] = "FunctionFacts";
+            TypeFacts[TypeFacts["UndefinedFacts"] = 2457472] = "UndefinedFacts";
+            TypeFacts[TypeFacts["NullFacts"] = 2340752] = "NullFacts";
+        })(TypeFacts || (TypeFacts = {}));
+        var typeofEQFacts = {
+            "string": 1 /* TypeofEQString */,
+            "number": 2 /* TypeofEQNumber */,
+            "boolean": 4 /* TypeofEQBoolean */,
+            "symbol": 8 /* TypeofEQSymbol */,
+            "undefined": 16384 /* EQUndefined */,
+            "object": 16 /* TypeofEQObject */,
+            "function": 32 /* TypeofEQFunction */
+        };
+        var typeofNEFacts = {
+            "string": 128 /* TypeofNEString */,
+            "number": 256 /* TypeofNENumber */,
+            "boolean": 512 /* TypeofNEBoolean */,
+            "symbol": 1024 /* TypeofNESymbol */,
+            "undefined": 131072 /* NEUndefined */,
+            "object": 2048 /* TypeofNEObject */,
+            "function": 4096 /* TypeofNEFunction */
+        };
+        var typeofTypesByName = {
+            "string": stringType,
+            "number": numberType,
+            "boolean": booleanType,
+            "symbol": esSymbolType,
+            "undefined": undefinedType
+        };
+        var jsxElementType;
+        /** Things we lazy load from the JSX namespace */
+        var jsxTypes = {};
+        var JsxNames = {
+            JSX: "JSX",
+            IntrinsicElements: "IntrinsicElements",
+            ElementClass: "ElementClass",
+            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
+            Element: "Element",
+            IntrinsicAttributes: "IntrinsicAttributes",
+            IntrinsicClassAttributes: "IntrinsicClassAttributes"
+        };
+        var subtypeRelation = {};
+        var assignableRelation = {};
+        var comparableRelation = {};
+        var identityRelation = {};
+        // This is for caching the result of getSymbolDisplayBuilder. Do not access directly.
+        var _displayBuilder;
+        var TypeSystemPropertyName;
+        (function (TypeSystemPropertyName) {
+            TypeSystemPropertyName[TypeSystemPropertyName["Type"] = 0] = "Type";
+            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedBaseConstructorType"] = 1] = "ResolvedBaseConstructorType";
+            TypeSystemPropertyName[TypeSystemPropertyName["DeclaredType"] = 2] = "DeclaredType";
+            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedReturnType"] = 3] = "ResolvedReturnType";
+        })(TypeSystemPropertyName || (TypeSystemPropertyName = {}));
+        var builtinGlobals = (_a = {},
+            _a[undefinedSymbol.name] = undefinedSymbol,
+            _a
+        );
+        initializeTypeChecker();
+        return checker;
+        function getEmitResolver(sourceFile, cancellationToken) {
+            // Ensure we have all the type information in place for this file so that all the
+            // emitter questions of this resolver will return the right information.
+            getDiagnostics(sourceFile, cancellationToken);
+            return emitResolver;
+        }
+        function error(location, message, arg0, arg1, arg2) {
+            var diagnostic = location
+                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
+                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
+            diagnostics.add(diagnostic);
+        }
+        function createSymbol(flags, name) {
+            symbolCount++;
+            return new Symbol(flags, name);
+        }
+        function getExcludedSymbolFlags(flags) {
+            var result = 0;
+            if (flags & 2 /* BlockScopedVariable */)
+                result |= 107455 /* BlockScopedVariableExcludes */;
+            if (flags & 1 /* FunctionScopedVariable */)
+                result |= 107454 /* FunctionScopedVariableExcludes */;
+            if (flags & 4 /* Property */)
+                result |= 0 /* PropertyExcludes */;
+            if (flags & 8 /* EnumMember */)
+                result |= 107455 /* EnumMemberExcludes */;
+            if (flags & 16 /* Function */)
+                result |= 106927 /* FunctionExcludes */;
+            if (flags & 32 /* Class */)
+                result |= 899519 /* ClassExcludes */;
+            if (flags & 64 /* Interface */)
+                result |= 792960 /* InterfaceExcludes */;
+            if (flags & 256 /* RegularEnum */)
+                result |= 899327 /* RegularEnumExcludes */;
+            if (flags & 128 /* ConstEnum */)
+                result |= 899967 /* ConstEnumExcludes */;
+            if (flags & 512 /* ValueModule */)
+                result |= 106639 /* ValueModuleExcludes */;
+            if (flags & 8192 /* Method */)
+                result |= 99263 /* MethodExcludes */;
+            if (flags & 32768 /* GetAccessor */)
+                result |= 41919 /* GetAccessorExcludes */;
+            if (flags & 65536 /* SetAccessor */)
+                result |= 74687 /* SetAccessorExcludes */;
+            if (flags & 262144 /* TypeParameter */)
+                result |= 530912 /* TypeParameterExcludes */;
+            if (flags & 524288 /* TypeAlias */)
+                result |= 793056 /* TypeAliasExcludes */;
+            if (flags & 8388608 /* Alias */)
+                result |= 8388608 /* AliasExcludes */;
+            return result;
+        }
+        function recordMergedSymbol(target, source) {
+            if (!source.mergeId) {
+                source.mergeId = nextMergeId;
+                nextMergeId++;
+            }
+            mergedSymbols[source.mergeId] = target;
+        }
+        function cloneSymbol(symbol) {
+            var result = createSymbol(symbol.flags | 33554432 /* Merged */, symbol.name);
+            result.declarations = symbol.declarations.slice(0);
+            result.parent = symbol.parent;
+            if (symbol.valueDeclaration)
+                result.valueDeclaration = symbol.valueDeclaration;
+            if (symbol.constEnumOnlyModule)
+                result.constEnumOnlyModule = true;
+            if (symbol.members)
+                result.members = cloneSymbolTable(symbol.members);
+            if (symbol.exports)
+                result.exports = cloneSymbolTable(symbol.exports);
+            recordMergedSymbol(result, symbol);
+            return result;
+        }
+        function mergeSymbol(target, source) {
+            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
+                if (source.flags & 512 /* ValueModule */ && target.flags & 512 /* ValueModule */ && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
+                    // reset flag when merging instantiated module into value module that has only const enums
+                    target.constEnumOnlyModule = false;
+                }
+                target.flags |= source.flags;
+                if (source.valueDeclaration &&
+                    (!target.valueDeclaration ||
+                        (target.valueDeclaration.kind === 225 /* ModuleDeclaration */ && source.valueDeclaration.kind !== 225 /* ModuleDeclaration */))) {
+                    // other kinds of value declarations take precedence over modules
+                    target.valueDeclaration = source.valueDeclaration;
+                }
+                ts.forEach(source.declarations, function (node) {
+                    target.declarations.push(node);
+                });
+                if (source.members) {
+                    if (!target.members)
+                        target.members = {};
+                    mergeSymbolTable(target.members, source.members);
+                }
+                if (source.exports) {
+                    if (!target.exports)
+                        target.exports = {};
+                    mergeSymbolTable(target.exports, source.exports);
+                }
+                recordMergedSymbol(target, source);
+            }
+            else {
+                var message_2 = target.flags & 2 /* BlockScopedVariable */ || source.flags & 2 /* BlockScopedVariable */
+                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
+                ts.forEach(source.declarations, function (node) {
+                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                });
+                ts.forEach(target.declarations, function (node) {
+                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                });
+            }
+        }
+        function cloneSymbolTable(symbolTable) {
+            var result = {};
+            for (var id in symbolTable) {
+                if (ts.hasProperty(symbolTable, id)) {
+                    result[id] = symbolTable[id];
+                }
+            }
+            return result;
+        }
+        function mergeSymbolTable(target, source) {
+            for (var id in source) {
+                if (ts.hasProperty(source, id)) {
+                    if (!ts.hasProperty(target, id)) {
+                        target[id] = source[id];
+                    }
+                    else {
+                        var symbol = target[id];
+                        if (!(symbol.flags & 33554432 /* Merged */)) {
+                            target[id] = symbol = cloneSymbol(symbol);
+                        }
+                        mergeSymbol(symbol, source[id]);
+                    }
+                }
+            }
+        }
+        function mergeModuleAugmentation(moduleName) {
+            var moduleAugmentation = moduleName.parent;
+            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
+                // this is a combined symbol for multiple augmentations within the same file.
+                // its symbol already has accumulated information for all declarations
+                // so we need to add it just once - do the work only for first declaration
+                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
+                return;
+            }
+            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
+                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
+            }
+            else {
+                // find a module that about to be augmented
+                // do not validate names of augmentations that are defined in ambient context
+                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
+                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
+                    : undefined;
+                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError);
+                if (!mainModule) {
+                    return;
+                }
+                // obtain item referenced by 'export='
+                mainModule = resolveExternalModuleSymbol(mainModule);
+                if (mainModule.flags & 1536 /* Namespace */) {
+                    // if module symbol has already been merged - it is safe to use it.
+                    // otherwise clone it
+                    mainModule = mainModule.flags & 33554432 /* Merged */ ? mainModule : cloneSymbol(mainModule);
+                    mergeSymbol(mainModule, moduleAugmentation.symbol);
+                }
+                else {
+                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
+                }
+            }
+        }
+        function addToSymbolTable(target, source, message) {
+            for (var id in source) {
+                if (ts.hasProperty(source, id)) {
+                    if (ts.hasProperty(target, id)) {
+                        // Error on redeclarations
+                        ts.forEach(target[id].declarations, addDeclarationDiagnostic(id, message));
+                    }
+                    else {
+                        target[id] = source[id];
+                    }
+                }
+            }
+            function addDeclarationDiagnostic(id, message) {
+                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
+            }
+        }
+        function getSymbolLinks(symbol) {
+            if (symbol.flags & 67108864 /* Transient */)
+                return symbol;
+            var id = getSymbolId(symbol);
+            return symbolLinks[id] || (symbolLinks[id] = {});
+        }
+        function getNodeLinks(node) {
+            var nodeId = getNodeId(node);
+            return nodeLinks[nodeId] || (nodeLinks[nodeId] = {});
+        }
+        function isGlobalSourceFile(node) {
+            return node.kind === 256 /* SourceFile */ && !ts.isExternalOrCommonJsModule(node);
+        }
+        function getSymbol(symbols, name, meaning) {
+            if (meaning && ts.hasProperty(symbols, name)) {
+                var symbol = symbols[name];
+                ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
+                if (symbol.flags & meaning) {
+                    return symbol;
+                }
+                if (symbol.flags & 8388608 /* Alias */) {
+                    var target = resolveAlias(symbol);
+                    // Unknown symbol means an error occurred in alias resolution, treat it as positive answer to avoid cascading errors
+                    if (target === unknownSymbol || target.flags & meaning) {
+                        return symbol;
+                    }
+                }
+            }
+            // return undefined if we can't find a symbol.
+        }
+        /**
+         * Get symbols that represent parameter-property-declaration as parameter and as property declaration
+         * @param parameter a parameterDeclaration node
+         * @param parameterName a name of the parameter to get the symbols for.
+         * @return a tuple of two symbols
+         */
+        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
+            var constructorDeclaration = parameter.parent;
+            var classDeclaration = parameter.parent.parent;
+            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455 /* Value */);
+            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455 /* Value */);
+            if (parameterSymbol && propertySymbol) {
+                return [parameterSymbol, propertySymbol];
+            }
+            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
+        }
+        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
+            var declarationFile = ts.getSourceFileOfNode(declaration);
+            var useFile = ts.getSourceFileOfNode(usage);
+            if (declarationFile !== useFile) {
+                if (modulekind || (!compilerOptions.outFile && !compilerOptions.out)) {
+                    // nodes are in different files and order cannot be determines
+                    return true;
+                }
+                var sourceFiles = host.getSourceFiles();
+                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
+            }
+            if (declaration.pos <= usage.pos) {
+                // declaration is before usage
+                // still might be illegal if usage is in the initializer of the variable declaration
+                return declaration.kind !== 218 /* VariableDeclaration */ ||
+                    !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
+            }
+            // declaration is after usage
+            // can be legal if usage is deferred (i.e. inside function or in initializer of instance property)
+            return isUsedInFunctionOrNonStaticProperty(declaration, usage);
+            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
+                var container = ts.getEnclosingBlockScopeContainer(declaration);
+                switch (declaration.parent.parent.kind) {
+                    case 200 /* VariableStatement */:
+                    case 206 /* ForStatement */:
+                    case 208 /* ForOfStatement */:
+                        // variable statement/for/for-of statement case,
+                        // use site should not be inside variable declaration (initializer of declaration or binding element)
+                        if (isSameScopeDescendentOf(usage, declaration, container)) {
+                            return true;
+                        }
+                        break;
+                }
+                switch (declaration.parent.parent.kind) {
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                        // ForIn/ForOf case - use site should not be used in expression part
+                        if (isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container)) {
+                            return true;
+                        }
+                }
+                return false;
+            }
+            function isUsedInFunctionOrNonStaticProperty(declaration, usage) {
+                var container = ts.getEnclosingBlockScopeContainer(declaration);
+                var current = usage;
+                while (current) {
+                    if (current === container) {
+                        return false;
+                    }
+                    if (ts.isFunctionLike(current)) {
+                        return true;
+                    }
+                    var initializerOfNonStaticProperty = current.parent &&
+                        current.parent.kind === 145 /* PropertyDeclaration */ &&
+                        (current.parent.flags & 32 /* Static */) === 0 &&
+                        current.parent.initializer === current;
+                    if (initializerOfNonStaticProperty) {
+                        return true;
+                    }
+                    current = current.parent;
+                }
+                return false;
+            }
+        }
+        // Resolve a given name for a given meaning at a given location. An error is reported if the name was not found and
+        // the nameNotFoundMessage argument is not undefined. Returns the resolved symbol, or undefined if no symbol with
+        // the given name can be found.
+        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg) {
+            var result;
+            var lastLocation;
+            var propertyWithInvalidInitializer;
+            var errorLocation = location;
+            var grandparent;
+            var isInExternalModule = false;
+            loop: while (location) {
+                // Locals of a source file are not in scope (because they get merged into the global symbol table)
+                if (location.locals && !isGlobalSourceFile(location)) {
+                    if (result = getSymbol(location.locals, name, meaning)) {
+                        var useResult = true;
+                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
+                            // symbol lookup restrictions for function-like declarations
+                            // - Type parameters of a function are in scope in the entire function declaration, including the parameter
+                            //   list and return type. However, local types are only in scope in the function body.
+                            // - parameters are only in the scope of function body
+                            // This restriction does not apply to JSDoc comment types because they are parented
+                            // at a higher level than type parameters would normally be
+                            if (meaning & result.flags & 793056 /* Type */ && lastLocation.kind !== 273 /* JSDocComment */) {
+                                useResult = result.flags & 262144 /* TypeParameter */
+                                    ? lastLocation === location.type ||
+                                        lastLocation.kind === 142 /* Parameter */ ||
+                                        lastLocation.kind === 141 /* TypeParameter */
+                                    : false;
+                            }
+                            if (meaning & 107455 /* Value */ && result.flags & 1 /* FunctionScopedVariable */) {
+                                // parameters are visible only inside function body, parameter list and return type
+                                // technically for parameter list case here we might mix parameters and variables declared in function,
+                                // however it is detected separately when checking initializers of parameters
+                                // to make sure that they reference no variables declared after them.
+                                useResult =
+                                    lastLocation.kind === 142 /* Parameter */ ||
+                                        (lastLocation === location.type &&
+                                            result.valueDeclaration.kind === 142 /* Parameter */);
+                            }
+                        }
+                        if (useResult) {
+                            break loop;
+                        }
+                        else {
+                            result = undefined;
+                        }
+                    }
+                }
+                switch (location.kind) {
+                    case 256 /* SourceFile */:
+                        if (!ts.isExternalOrCommonJsModule(location))
+                            break;
+                        isInExternalModule = true;
+                    case 225 /* ModuleDeclaration */:
+                        var moduleExports = getSymbolOfNode(location).exports;
+                        if (location.kind === 256 /* SourceFile */ || ts.isAmbientModule(location)) {
+                            // It's an external module. First see if the module has an export default and if the local
+                            // name of that export default matches.
+                            if (result = moduleExports["default"]) {
+                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
+                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
+                                    break loop;
+                                }
+                                result = undefined;
+                            }
+                            // Because of module/namespace merging, a module's exports are in scope,
+                            // yet we never want to treat an export specifier as putting a member in scope.
+                            // Therefore, if the name we find is purely an export specifier, it is not actually considered in scope.
+                            // Two things to note about this:
+                            //     1. We have to check this without calling getSymbol. The problem with calling getSymbol
+                            //        on an export specifier is that it might find the export specifier itself, and try to
+                            //        resolve it as an alias. This will cause the checker to consider the export specifier
+                            //        a circular alias reference when it might not be.
+                            //     2. We check === SymbolFlags.Alias in order to check that the symbol is *purely*
+                            //        an alias. If we used &, we'd be throwing out symbols that have non alias aspects,
+                            //        which is not the desired behavior.
+                            if (ts.hasProperty(moduleExports, name) &&
+                                moduleExports[name].flags === 8388608 /* Alias */ &&
+                                ts.getDeclarationOfKind(moduleExports[name], 238 /* ExportSpecifier */)) {
+                                break;
+                            }
+                        }
+                        if (result = getSymbol(moduleExports, name, meaning & 8914931 /* ModuleMember */)) {
+                            break loop;
+                        }
+                        break;
+                    case 224 /* EnumDeclaration */:
+                        if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & 8 /* EnumMember */)) {
+                            break loop;
+                        }
+                        break;
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                        // TypeScript 1.0 spec (April 2014): 8.4.1
+                        // Initializer expressions for instance member variables are evaluated in the scope
+                        // of the class constructor body but are not permitted to reference parameters or
+                        // local variables of the constructor. This effectively means that entities from outer scopes
+                        // by the same name as a constructor parameter or local variable are inaccessible
+                        // in initializer expressions for instance member variables.
+                        if (ts.isClassLike(location.parent) && !(location.flags & 32 /* Static */)) {
+                            var ctor = findConstructorDeclaration(location.parent);
+                            if (ctor && ctor.locals) {
+                                if (getSymbol(ctor.locals, name, meaning & 107455 /* Value */)) {
+                                    // Remember the property node, it will be used later to report appropriate error
+                                    propertyWithInvalidInitializer = location;
+                                }
+                            }
+                        }
+                        break;
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                    case 222 /* InterfaceDeclaration */:
+                        if (result = getSymbol(getSymbolOfNode(location).members, name, meaning & 793056 /* Type */)) {
+                            if (lastLocation && lastLocation.flags & 32 /* Static */) {
+                                // TypeScript 1.0 spec (April 2014): 3.4.1
+                                // The scope of a type parameter extends over the entire declaration with which the type
+                                // parameter list is associated, with the exception of static member declarations in classes.
+                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
+                                return undefined;
+                            }
+                            break loop;
+                        }
+                        if (location.kind === 192 /* ClassExpression */ && meaning & 32 /* Class */) {
+                            var className = location.name;
+                            if (className && name === className.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    // It is not legal to reference a class's own type parameters from a computed property name that
+                    // belongs to the class. For example:
+                    //
+                    //   function foo<T>() { return '' }
+                    //   class C<T> { // <-- Class's own type parameter T
+                    //       [foo<T>()]() { } // <-- Reference to T from class's own computed property
+                    //   }
+                    //
+                    case 140 /* ComputedPropertyName */:
+                        grandparent = location.parent.parent;
+                        if (ts.isClassLike(grandparent) || grandparent.kind === 222 /* InterfaceDeclaration */) {
+                            // A reference to this grandparent's type parameters would be an error
+                            if (result = getSymbol(getSymbolOfNode(grandparent).members, name, meaning & 793056 /* Type */)) {
+                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
+                                return undefined;
+                            }
+                        }
+                        break;
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 148 /* Constructor */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 220 /* FunctionDeclaration */:
+                    case 180 /* ArrowFunction */:
+                        if (meaning & 3 /* Variable */ && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        break;
+                    case 179 /* FunctionExpression */:
+                        if (meaning & 3 /* Variable */ && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        if (meaning & 16 /* Function */) {
+                            var functionName = location.name;
+                            if (functionName && name === functionName.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    case 143 /* Decorator */:
+                        // Decorators are resolved at the class declaration. Resolving at the parameter
+                        // or member would result in looking up locals in the method.
+                        //
+                        //   function y() {}
+                        //   class C {
+                        //       method(@y x, y) {} // <-- decorator y should be resolved at the class declaration, not the parameter.
+                        //   }
+                        //
+                        if (location.parent && location.parent.kind === 142 /* Parameter */) {
+                            location = location.parent;
+                        }
+                        //
+                        //   function y() {}
+                        //   class C {
+                        //       @y method(x, y) {} // <-- decorator y should be resolved at the class declaration, not the method.
+                        //   }
+                        //
+                        if (location.parent && ts.isClassElement(location.parent)) {
+                            location = location.parent;
+                        }
+                        break;
+                }
+                lastLocation = location;
+                location = location.parent;
+            }
+            if (!result) {
+                result = getSymbol(globals, name, meaning);
+            }
+            if (!result) {
+                if (nameNotFoundMessage) {
+                    if (!checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg)) {
+                        error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                    }
+                }
+                return undefined;
+            }
+            // Perform extra checks only if error reporting was requested
+            if (nameNotFoundMessage) {
+                if (propertyWithInvalidInitializer) {
+                    // We have a match, but the reference occurred within a property initializer and the identifier also binds
+                    // to a local variable in the constructor where the code will be emitted.
+                    var propertyName = propertyWithInvalidInitializer.name;
+                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                    return undefined;
+                }
+                // Only check for block-scoped variable if we are looking for the
+                // name with variable meaning
+                //      For example,
+                //          declare module foo {
+                //              interface bar {}
+                //          }
+                //      const foo/*1*/: foo/*2*/.bar;
+                // The foo at /*1*/ and /*2*/ will share same symbol with two meaning
+                // block - scope variable and namespace module. However, only when we
+                // try to resolve name in /*1*/ which is used in variable position,
+                // we want to check for block- scoped
+                if (meaning & 2 /* BlockScopedVariable */) {
+                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
+                    if (exportOrLocalSymbol.flags & 2 /* BlockScopedVariable */) {
+                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
+                    }
+                }
+                // If we're in an external module, we can't reference symbols created from UMD export declarations
+                if (result && isInExternalModule) {
+                    var decls = result.declarations;
+                    if (decls && decls.length === 1 && decls[0].kind === 228 /* NamespaceExportDeclaration */) {
+                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
+                    }
+                }
+            }
+            return result;
+        }
+        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
+            if (!errorLocation || (errorLocation.kind === 69 /* Identifier */ && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
+                return false;
+            }
+            var container = ts.getThisContainer(errorLocation, /* includeArrowFunctions */ true);
+            var location = container;
+            while (location) {
+                if (ts.isClassLike(location.parent)) {
+                    var classSymbol = getSymbolOfNode(location.parent);
+                    if (!classSymbol) {
+                        break;
+                    }
+                    // Check to see if a static member exists.
+                    var constructorType = getTypeOfSymbol(classSymbol);
+                    if (getPropertyOfType(constructorType, name)) {
+                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
+                        return true;
+                    }
+                    // No static member is present.
+                    // Check if we're in an instance method and look for a relevant instance member.
+                    if (location === container && !(location.flags & 32 /* Static */)) {
+                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
+                        if (getPropertyOfType(instanceType, name)) {
+                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                            return true;
+                        }
+                    }
+                }
+                location = location.parent;
+            }
+            return false;
+        }
+        function checkResolvedBlockScopedVariable(result, errorLocation) {
+            ts.Debug.assert((result.flags & 2 /* BlockScopedVariable */) !== 0);
+            // Block-scoped variables cannot be used before their definition
+            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) ? d : undefined; });
+            ts.Debug.assert(declaration !== undefined, "Block-scoped variable declaration is undefined");
+            if (!isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 218 /* VariableDeclaration */), errorLocation)) {
+                error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+            }
+        }
+        /* Starting from 'initial' node walk up the parent chain until 'stopAt' node is reached.
+         * If at any point current node is equal to 'parent' node - return true.
+         * Return false if 'stopAt' node is reached or isFunctionLike(current) === true.
+         */
+        function isSameScopeDescendentOf(initial, parent, stopAt) {
+            if (!parent) {
+                return false;
+            }
+            for (var current = initial; current && current !== stopAt && !ts.isFunctionLike(current); current = current.parent) {
+                if (current === parent) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function getAnyImportSyntax(node) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                if (node.kind === 229 /* ImportEqualsDeclaration */) {
+                    return node;
+                }
+                while (node && node.kind !== 230 /* ImportDeclaration */) {
+                    node = node.parent;
+                }
+                return node;
+            }
+        }
+        function getDeclarationOfAliasSymbol(symbol) {
+            return ts.forEach(symbol.declarations, function (d) { return ts.isAliasSymbolDeclaration(d) ? d : undefined; });
+        }
+        function getTargetOfImportEqualsDeclaration(node) {
+            if (node.moduleReference.kind === 240 /* ExternalModuleReference */) {
+                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
+            }
+            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, node);
+        }
+        function getTargetOfImportClause(node) {
+            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
+            if (moduleSymbol) {
+                var exportDefaultSymbol = moduleSymbol.exports["export="] ?
+                    getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
+                    resolveSymbol(moduleSymbol.exports["default"]);
+                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
+                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
+                }
+                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
+                    return resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
+                }
+                return exportDefaultSymbol;
+            }
+        }
+        function getTargetOfNamespaceImport(node) {
+            var moduleSpecifier = node.parent.parent.moduleSpecifier;
+            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier);
+        }
+        // This function creates a synthetic symbol that combines the value side of one symbol with the
+        // type/namespace side of another symbol. Consider this example:
+        //
+        //   declare module graphics {
+        //       interface Point {
+        //           x: number;
+        //           y: number;
+        //       }
+        //   }
+        //   declare var graphics: {
+        //       Point: new (x: number, y: number) => graphics.Point;
+        //   }
+        //   declare module "graphics" {
+        //       export = graphics;
+        //   }
+        //
+        // An 'import { Point } from "graphics"' needs to create a symbol that combines the value side 'Point'
+        // property with the type/namespace side interface 'Point'.
+        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
+            if (valueSymbol.flags & (793056 /* Type */ | 1536 /* Namespace */)) {
+                return valueSymbol;
+            }
+            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
+            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
+            result.parent = valueSymbol.parent || typeSymbol.parent;
+            if (valueSymbol.valueDeclaration)
+                result.valueDeclaration = valueSymbol.valueDeclaration;
+            if (typeSymbol.members)
+                result.members = typeSymbol.members;
+            if (valueSymbol.exports)
+                result.exports = valueSymbol.exports;
+            return result;
+        }
+        function getExportOfModule(symbol, name) {
+            if (symbol.flags & 1536 /* Module */) {
+                var exports = getExportsOfSymbol(symbol);
+                if (ts.hasProperty(exports, name)) {
+                    return resolveSymbol(exports[name]);
+                }
+            }
+        }
+        function getPropertyOfVariable(symbol, name) {
+            if (symbol.flags & 3 /* Variable */) {
+                var typeAnnotation = symbol.valueDeclaration.type;
+                if (typeAnnotation) {
+                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
+                }
+            }
+        }
+        function getExternalModuleMember(node, specifier) {
+            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier);
+            if (targetSymbol) {
+                var name_10 = specifier.propertyName || specifier.name;
+                if (name_10.text) {
+                    var symbolFromVariable = void 0;
+                    // First check if module was specified with "export=". If so, get the member from the resolved type
+                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
+                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_10.text);
+                    }
+                    else {
+                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_10.text);
+                    }
+                    // if symbolFromVariable is export - get its final target
+                    symbolFromVariable = resolveSymbol(symbolFromVariable);
+                    var symbolFromModule = getExportOfModule(targetSymbol, name_10.text);
+                    var symbol = symbolFromModule && symbolFromVariable ?
+                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
+                        symbolFromModule || symbolFromVariable;
+                    if (!symbol) {
+                        error(name_10, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_10));
+                    }
+                    return symbol;
+                }
+            }
+        }
+        function getTargetOfImportSpecifier(node) {
+            return getExternalModuleMember(node.parent.parent.parent, node);
+        }
+        function getTargetOfGlobalModuleExportDeclaration(node) {
+            return resolveExternalModuleSymbol(node.parent.symbol);
+        }
+        function getTargetOfExportSpecifier(node) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node) :
+                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */);
+        }
+        function getTargetOfExportAssignment(node) {
+            return resolveEntityName(node.expression, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */);
+        }
+        function getTargetOfAliasDeclaration(node) {
+            switch (node.kind) {
+                case 229 /* ImportEqualsDeclaration */:
+                    return getTargetOfImportEqualsDeclaration(node);
+                case 231 /* ImportClause */:
+                    return getTargetOfImportClause(node);
+                case 232 /* NamespaceImport */:
+                    return getTargetOfNamespaceImport(node);
+                case 234 /* ImportSpecifier */:
+                    return getTargetOfImportSpecifier(node);
+                case 238 /* ExportSpecifier */:
+                    return getTargetOfExportSpecifier(node);
+                case 235 /* ExportAssignment */:
+                    return getTargetOfExportAssignment(node);
+                case 228 /* NamespaceExportDeclaration */:
+                    return getTargetOfGlobalModuleExportDeclaration(node);
+            }
+        }
+        function resolveSymbol(symbol) {
+            return symbol && symbol.flags & 8388608 /* Alias */ && !(symbol.flags & (107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */)) ? resolveAlias(symbol) : symbol;
+        }
+        function resolveAlias(symbol) {
+            ts.Debug.assert((symbol.flags & 8388608 /* Alias */) !== 0, "Should only get Alias here.");
+            var links = getSymbolLinks(symbol);
+            if (!links.target) {
+                links.target = resolvingSymbol;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                var target = getTargetOfAliasDeclaration(node);
+                if (links.target === resolvingSymbol) {
+                    links.target = target || unknownSymbol;
+                }
+                else {
+                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
+                }
+            }
+            else if (links.target === resolvingSymbol) {
+                links.target = unknownSymbol;
+            }
+            return links.target;
+        }
+        function markExportAsReferenced(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target) {
+                var markAlias = target === unknownSymbol ||
+                    ((target.flags & 107455 /* Value */) && !isConstEnumOrConstEnumOnlyModule(target));
+                if (markAlias) {
+                    markAliasSymbolAsReferenced(symbol);
+                }
+            }
+        }
+        // When an alias symbol is referenced, we need to mark the entity it references as referenced and in turn repeat that until
+        // we reach a non-alias or an exported entity (which is always considered referenced). We do this by checking the target of
+        // the alias as an expression (which recursively takes us back here if the target references another alias).
+        function markAliasSymbolAsReferenced(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.referenced) {
+                links.referenced = true;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                if (node.kind === 235 /* ExportAssignment */) {
+                    // export default <symbol>
+                    checkExpressionCached(node.expression);
+                }
+                else if (node.kind === 238 /* ExportSpecifier */) {
+                    // export { <symbol> } or export { <symbol> as foo }
+                    checkExpressionCached(node.propertyName || node.name);
+                }
+                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    // import foo = <symbol>
+                    checkExpressionCached(node.moduleReference);
+                }
+            }
+        }
+        // This function is only for imports with entity names
+        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importDeclaration, dontResolveAlias) {
+            // There are three things we might try to look for. In the following examples,
+            // the search term is enclosed in |...|:
+            //
+            //     import a = |b|; // Namespace
+            //     import a = |b.c|; // Value, type, namespace
+            //     import a = |b.c|.d; // Namespace
+            if (entityName.kind === 69 /* Identifier */ && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            // Check for case 1 and 3 in the above example
+            if (entityName.kind === 69 /* Identifier */ || entityName.parent.kind === 139 /* QualifiedName */) {
+                return resolveEntityName(entityName, 1536 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            }
+            else {
+                // Case 2 in above example
+                // entityName.kind could be a QualifiedName or a Missing identifier
+                ts.Debug.assert(entityName.parent.kind === 229 /* ImportEqualsDeclaration */);
+                return resolveEntityName(entityName, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            }
+        }
+        function getFullyQualifiedName(symbol) {
+            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
+        }
+        // Resolves a qualified name and any involved aliases
+        function resolveEntityName(name, meaning, ignoreErrors, dontResolveAlias) {
+            if (ts.nodeIsMissing(name)) {
+                return undefined;
+            }
+            var symbol;
+            if (name.kind === 69 /* Identifier */) {
+                var message = meaning === 1536 /* Namespace */ ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
+                symbol = resolveName(name, name.text, meaning, ignoreErrors ? undefined : message, name);
+                if (!symbol) {
+                    return undefined;
+                }
+            }
+            else if (name.kind === 139 /* QualifiedName */ || name.kind === 172 /* PropertyAccessExpression */) {
+                var left = name.kind === 139 /* QualifiedName */ ? name.left : name.expression;
+                var right = name.kind === 139 /* QualifiedName */ ? name.right : name.name;
+                var namespace = resolveEntityName(left, 1536 /* Namespace */, ignoreErrors);
+                if (!namespace || namespace === unknownSymbol || ts.nodeIsMissing(right)) {
+                    return undefined;
+                }
+                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
+                if (!symbol) {
+                    if (!ignoreErrors) {
+                        error(right, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
+                    }
+                    return undefined;
+                }
+            }
+            else {
+                ts.Debug.fail("Unknown entity name kind.");
+            }
+            ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
+            return (symbol.flags & meaning) || dontResolveAlias ? symbol : resolveAlias(symbol);
+        }
+        function resolveExternalModuleName(location, moduleReferenceExpression) {
+            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
+        }
+        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError) {
+            if (moduleReferenceExpression.kind !== 9 /* StringLiteral */) {
+                return;
+            }
+            var moduleReferenceLiteral = moduleReferenceExpression;
+            // Module names are escaped in our symbol table.  However, string literal values aren't.
+            // Escape the name in the "require(...)" clause to ensure we find the right symbol.
+            var moduleName = ts.escapeIdentifier(moduleReferenceLiteral.text);
+            if (moduleName === undefined) {
+                return;
+            }
+            var isRelative = ts.isExternalModuleNameRelative(moduleName);
+            if (!isRelative) {
+                var symbol = getSymbol(globals, '"' + moduleName + '"', 512 /* ValueModule */);
+                if (symbol) {
+                    // merged symbol is module declaration symbol combined with all augmentations
+                    return getMergedSymbol(symbol);
+                }
+            }
+            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReferenceLiteral.text);
+            var sourceFile = resolvedModule && host.getSourceFile(resolvedModule.resolvedFileName);
+            if (sourceFile) {
+                if (sourceFile.symbol) {
+                    // merged symbol is module declaration symbol combined with all augmentations
+                    return getMergedSymbol(sourceFile.symbol);
+                }
+                if (moduleNotFoundError) {
+                    // report errors only if it was requested
+                    error(moduleReferenceLiteral, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
+                }
+                return undefined;
+            }
+            if (patternAmbientModules) {
+                var pattern = ts.findBestPatternMatch(patternAmbientModules, function (_) { return _.pattern; }, moduleName);
+                if (pattern) {
+                    return getMergedSymbol(pattern.symbol);
+                }
+            }
+            if (moduleNotFoundError) {
+                // report errors only if it was requested
+                error(moduleReferenceLiteral, moduleNotFoundError, moduleName);
+            }
+            return undefined;
+        }
+        // An external module with an 'export =' declaration resolves to the target of the 'export =' declaration,
+        // and an external module with no 'export =' declaration resolves to the module itself.
+        function resolveExternalModuleSymbol(moduleSymbol) {
+            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports["export="])) || moduleSymbol;
+        }
+        // An external module with an 'export =' declaration may be referenced as an ES6 module provided the 'export ='
+        // references a symbol that is at least declared as a module or a variable. The target of the 'export =' may
+        // combine other declarations with the module or variable (e.g. a class/module, function/module, interface/variable).
+        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression) {
+            var symbol = resolveExternalModuleSymbol(moduleSymbol);
+            if (symbol && !(symbol.flags & (1536 /* Module */ | 3 /* Variable */))) {
+                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
+                symbol = undefined;
+            }
+            return symbol;
+        }
+        function hasExportAssignmentSymbol(moduleSymbol) {
+            return moduleSymbol.exports["export="] !== undefined;
+        }
+        function getExportsOfModuleAsArray(moduleSymbol) {
+            return symbolsToArray(getExportsOfModule(moduleSymbol));
+        }
+        function getExportsOfSymbol(symbol) {
+            return symbol.flags & 1536 /* Module */ ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
+        }
+        function getExportsOfModule(moduleSymbol) {
+            var links = getSymbolLinks(moduleSymbol);
+            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
+        }
+        /**
+         * Extends one symbol table with another while collecting information on name collisions for error message generation into the `lookupTable` argument
+         * Not passing `lookupTable` and `exportNode` disables this collection, and just extends the tables
+         */
+        function extendExportSymbols(target, source, lookupTable, exportNode) {
+            for (var id in source) {
+                if (id !== "default" && !ts.hasProperty(target, id)) {
+                    target[id] = source[id];
+                    if (lookupTable && exportNode) {
+                        lookupTable[id] = {
+                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
+                        };
+                    }
+                }
+                else if (lookupTable && exportNode && id !== "default" && ts.hasProperty(target, id) && resolveSymbol(target[id]) !== resolveSymbol(source[id])) {
+                    if (!lookupTable[id].exportsWithDuplicate) {
+                        lookupTable[id].exportsWithDuplicate = [exportNode];
+                    }
+                    else {
+                        lookupTable[id].exportsWithDuplicate.push(exportNode);
+                    }
+                }
+            }
+        }
+        function getExportsForModule(moduleSymbol) {
+            var visitedSymbols = [];
+            return visit(moduleSymbol) || moduleSymbol.exports;
+            // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
+            // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
+            function visit(symbol) {
+                if (!(symbol && symbol.flags & 1952 /* HasExports */ && !ts.contains(visitedSymbols, symbol))) {
+                    return;
+                }
+                visitedSymbols.push(symbol);
+                var symbols = cloneSymbolTable(symbol.exports);
+                // All export * declarations are collected in an __export symbol by the binder
+                var exportStars = symbol.exports["__export"];
+                if (exportStars) {
+                    var nestedSymbols = {};
+                    var lookupTable = {};
+                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
+                        var node = _a[_i];
+                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
+                        var exportedSymbols = visit(resolvedModule);
+                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable, node);
+                    }
+                    for (var id in lookupTable) {
+                        var exportsWithDuplicate = lookupTable[id].exportsWithDuplicate;
+                        // It's not an error if the file with multiple `export *`s with duplicate names exports a member with that name itself
+                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || ts.hasProperty(symbols, id)) {
+                            continue;
+                        }
+                        for (var _b = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _b < exportsWithDuplicate_1.length; _b++) {
+                            var node = exportsWithDuplicate_1[_b];
+                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable[id].specifierText, id));
+                        }
+                    }
+                    extendExportSymbols(symbols, nestedSymbols);
+                }
+                return symbols;
+            }
+        }
+        function getMergedSymbol(symbol) {
+            var merged;
+            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
+        }
+        function getSymbolOfNode(node) {
+            return getMergedSymbol(node.symbol);
+        }
+        function getParentOfSymbol(symbol) {
+            return getMergedSymbol(symbol.parent);
+        }
+        function getExportSymbolOfValueSymbolIfExported(symbol) {
+            return symbol && (symbol.flags & 1048576 /* ExportValue */) !== 0
+                ? getMergedSymbol(symbol.exportSymbol)
+                : symbol;
+        }
+        function symbolIsValue(symbol) {
+            // If it is an instantiated symbol, then it is a value if the symbol it is an
+            // instantiation of is a value.
+            if (symbol.flags & 16777216 /* Instantiated */) {
+                return symbolIsValue(getSymbolLinks(symbol).target);
+            }
+            // If the symbol has the value flag, it is trivially a value.
+            if (symbol.flags & 107455 /* Value */) {
+                return true;
+            }
+            // If it is an alias, then it is a value if the symbol it resolves to is a value.
+            if (symbol.flags & 8388608 /* Alias */) {
+                return (resolveAlias(symbol).flags & 107455 /* Value */) !== 0;
+            }
+            return false;
+        }
+        function findConstructorDeclaration(node) {
+            var members = node.members;
+            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
+                var member = members_1[_i];
+                if (member.kind === 148 /* Constructor */ && ts.nodeIsPresent(member.body)) {
+                    return member;
+                }
+            }
+        }
+        function createType(flags) {
+            var result = new Type(checker, flags);
+            result.id = typeCount;
+            typeCount++;
+            return result;
+        }
+        function createIntrinsicType(kind, intrinsicName) {
+            var type = createType(kind);
+            type.intrinsicName = intrinsicName;
+            return type;
+        }
+        function createObjectType(kind, symbol) {
+            var type = createType(kind);
+            type.symbol = symbol;
+            return type;
+        }
+        // A reserved member name starts with two underscores, but the third character cannot be an underscore
+        // or the @ symbol. A third underscore indicates an escaped form of an identifer that started
+        // with at least two underscores. The @ character indicates that the name is denoted by a well known ES
+        // Symbol instance.
+        function isReservedMemberName(name) {
+            return name.charCodeAt(0) === 95 /* _ */ &&
+                name.charCodeAt(1) === 95 /* _ */ &&
+                name.charCodeAt(2) !== 95 /* _ */ &&
+                name.charCodeAt(2) !== 64 /* at */;
+        }
+        function getNamedMembers(members) {
+            var result;
+            for (var id in members) {
+                if (ts.hasProperty(members, id)) {
+                    if (!isReservedMemberName(id)) {
+                        if (!result)
+                            result = [];
+                        var symbol = members[id];
+                        if (symbolIsValue(symbol)) {
+                            result.push(symbol);
+                        }
+                    }
+                }
+            }
+            return result || emptyArray;
+        }
+        function setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            type.members = members;
+            type.properties = getNamedMembers(members);
+            type.callSignatures = callSignatures;
+            type.constructSignatures = constructSignatures;
+            if (stringIndexInfo)
+                type.stringIndexInfo = stringIndexInfo;
+            if (numberIndexInfo)
+                type.numberIndexInfo = numberIndexInfo;
+            return type;
+        }
+        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            return setObjectTypeMembers(createObjectType(65536 /* Anonymous */, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
+            var result;
+            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
+                // Locals of a source file are not in scope (because they get merged into the global symbol table)
+                if (location_1.locals && !isGlobalSourceFile(location_1)) {
+                    if (result = callback(location_1.locals)) {
+                        return result;
+                    }
+                }
+                switch (location_1.kind) {
+                    case 256 /* SourceFile */:
+                        if (!ts.isExternalOrCommonJsModule(location_1)) {
+                            break;
+                        }
+                    case 225 /* ModuleDeclaration */:
+                        if (result = callback(getSymbolOfNode(location_1).exports)) {
+                            return result;
+                        }
+                        break;
+                }
+            }
+            return callback(globals);
+        }
+        function getQualifiedLeftMeaning(rightMeaning) {
+            // If we are looking in value space, the parent meaning is value, other wise it is namespace
+            return rightMeaning === 107455 /* Value */ ? 107455 /* Value */ : 1536 /* Namespace */;
+        }
+        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
+            function getAccessibleSymbolChainFromSymbolTable(symbols) {
+                function canQualifySymbol(symbolFromSymbolTable, meaning) {
+                    // If the symbol is equivalent and doesn't need further qualification, this symbol is accessible
+                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
+                        return true;
+                    }
+                    // If symbol needs qualification, make sure that parent is accessible, if it is then this symbol is accessible too
+                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
+                    return !!accessibleParent;
+                }
+                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
+                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
+                        // if the symbolFromSymbolTable is not external module (it could be if it was determined as ambient external module and would be in globals table)
+                        // and if symbolFromSymbolTable or alias resolution matches the symbol,
+                        // check the symbol can be qualified, it is only then this symbol is accessible
+                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
+                            canQualifySymbol(symbolFromSymbolTable, meaning);
+                    }
+                }
+                // If symbol is directly available by its name in the symbol table
+                if (isAccessible(ts.lookUp(symbols, symbol.name))) {
+                    return [symbol];
+                }
+                // Check if symbol is any of the alias
+                return ts.forEachValue(symbols, function (symbolFromSymbolTable) {
+                    if (symbolFromSymbolTable.flags & 8388608 /* Alias */
+                        && symbolFromSymbolTable.name !== "export="
+                        && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238 /* ExportSpecifier */)) {
+                        if (!useOnlyExternalAliasing ||
+                            // Is this external alias, then use it to name
+                            ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
+                            var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
+                            if (isAccessible(symbolFromSymbolTable, resolveAlias(symbolFromSymbolTable))) {
+                                return [symbolFromSymbolTable];
+                            }
+                            // Look in the exported members, if we can find accessibleSymbolChain, symbol is accessible using this chain
+                            // but only if the symbolFromSymbolTable can be qualified
+                            var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTable(resolvedImportedSymbol.exports) : undefined;
+                            if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
+                                return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
+                            }
+                        }
+                    }
+                });
+            }
+            if (symbol) {
+                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
+                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
+                }
+            }
+        }
+        function needsQualification(symbol, enclosingDeclaration, meaning) {
+            var qualify = false;
+            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
+                // If symbol of this name is not available in the symbol table we are ok
+                if (!ts.hasProperty(symbolTable, symbol.name)) {
+                    // Continue to the next symbol table
+                    return false;
+                }
+                // If the symbol with this name is present it should refer to the symbol
+                var symbolFromSymbolTable = symbolTable[symbol.name];
+                if (symbolFromSymbolTable === symbol) {
+                    // No need to qualify
+                    return true;
+                }
+                // Qualify if the symbol from symbol table has same meaning as expected
+                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 /* Alias */ && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238 /* ExportSpecifier */)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
+                if (symbolFromSymbolTable.flags & meaning) {
+                    qualify = true;
+                    return true;
+                }
+                // Continue to the next symbol table
+                return false;
+            });
+            return qualify;
+        }
+        function isPropertyOrMethodDeclarationSymbol(symbol) {
+            if (symbol.declarations && symbol.declarations.length) {
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    switch (declaration.kind) {
+                        case 145 /* PropertyDeclaration */:
+                        case 147 /* MethodDeclaration */:
+                        case 149 /* GetAccessor */:
+                        case 150 /* SetAccessor */:
+                            continue;
+                        default:
+                            return false;
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function isSymbolAccessible(symbol, enclosingDeclaration, meaning) {
+            if (symbol && enclosingDeclaration && !(symbol.flags & 262144 /* TypeParameter */)) {
+                var initialSymbol = symbol;
+                var meaningToLook = meaning;
+                while (symbol) {
+                    // Symbol is accessible if it by itself is accessible
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, /*useOnlyExternalAliasing*/ false);
+                    if (accessibleSymbolChain) {
+                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0]);
+                        if (!hasAccessibleDeclarations) {
+                            return {
+                                accessibility: 1 /* NotAccessible */,
+                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1536 /* Namespace */) : undefined
+                            };
+                        }
+                        return hasAccessibleDeclarations;
+                    }
+                    // If we haven't got the accessible symbol, it doesn't mean the symbol is actually inaccessible.
+                    // It could be a qualified symbol and hence verify the path
+                    // e.g.:
+                    // module m {
+                    //     export class c {
+                    //     }
+                    // }
+                    // const x: typeof m.c
+                    // In the above example when we start with checking if typeof m.c symbol is accessible,
+                    // we are going to see if c can be accessed in scope directly.
+                    // But it can't, hence the accessible is going to be undefined, but that doesn't mean m.c is inaccessible
+                    // It is accessible if the parent m is accessible because then m.c can be accessed through qualification
+                    meaningToLook = getQualifiedLeftMeaning(meaning);
+                    symbol = getParentOfSymbol(symbol);
+                }
+                // This could be a symbol that is not exported in the external module
+                // or it could be a symbol from different external module that is not aliased and hence cannot be named
+                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
+                if (symbolExternalModule) {
+                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
+                    if (symbolExternalModule !== enclosingExternalModule) {
+                        // name from different external module that is not visible
+                        return {
+                            accessibility: 2 /* CannotBeNamed */,
+                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                            errorModuleName: symbolToString(symbolExternalModule)
+                        };
+                    }
+                }
+                // Just a local name that is not accessible
+                return {
+                    accessibility: 1 /* NotAccessible */,
+                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning)
+                };
+            }
+            return { accessibility: 0 /* Accessible */ };
+            function getExternalModuleContainer(declaration) {
+                for (; declaration; declaration = declaration.parent) {
+                    if (hasExternalModuleSymbol(declaration)) {
+                        return getSymbolOfNode(declaration);
+                    }
+                }
+            }
+        }
+        function hasExternalModuleSymbol(declaration) {
+            return ts.isAmbientModule(declaration) || (declaration.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(declaration));
+        }
+        function hasVisibleDeclarations(symbol) {
+            var aliasesToMakeVisible;
+            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
+                return undefined;
+            }
+            return { accessibility: 0 /* Accessible */, aliasesToMakeVisible: aliasesToMakeVisible };
+            function getIsDeclarationVisible(declaration) {
+                if (!isDeclarationVisible(declaration)) {
+                    // Mark the unexported alias as visible if its parent is visible
+                    // because these kind of aliases can be used to name types in declaration file
+                    var anyImportSyntax = getAnyImportSyntax(declaration);
+                    if (anyImportSyntax &&
+                        !(anyImportSyntax.flags & 1 /* Export */) &&
+                        isDeclarationVisible(anyImportSyntax.parent)) {
+                        getNodeLinks(declaration).isVisible = true;
+                        if (aliasesToMakeVisible) {
+                            if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
+                                aliasesToMakeVisible.push(anyImportSyntax);
+                            }
+                        }
+                        else {
+                            aliasesToMakeVisible = [anyImportSyntax];
+                        }
+                        return true;
+                    }
+                    // Declaration is not visible
+                    return false;
+                }
+                return true;
+            }
+        }
+        function isEntityNameVisible(entityName, enclosingDeclaration) {
+            // get symbol of the first identifier of the entityName
+            var meaning;
+            if (entityName.parent.kind === 158 /* TypeQuery */ || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                // Typeof value
+                meaning = 107455 /* Value */ | 1048576 /* ExportValue */;
+            }
+            else if (entityName.kind === 139 /* QualifiedName */ || entityName.kind === 172 /* PropertyAccessExpression */ ||
+                entityName.parent.kind === 229 /* ImportEqualsDeclaration */) {
+                // Left identifier from type reference or TypeAlias
+                // Entity name of the import declaration
+                meaning = 1536 /* Namespace */;
+            }
+            else {
+                // Type Reference or TypeAlias entity = Identifier
+                meaning = 793056 /* Type */;
+            }
+            var firstIdentifier = getFirstIdentifier(entityName);
+            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
+            // Verify if the symbol is accessible
+            return (symbol && hasVisibleDeclarations(symbol)) || {
+                accessibility: 1 /* NotAccessible */,
+                errorSymbolName: ts.getTextOfNode(firstIdentifier),
+                errorNode: firstIdentifier
+            };
+        }
+        function writeKeyword(writer, kind) {
+            writer.writeKeyword(ts.tokenToString(kind));
+        }
+        function writePunctuation(writer, kind) {
+            writer.writePunctuation(ts.tokenToString(kind));
+        }
+        function writeSpace(writer) {
+            writer.writeSpace(" ");
+        }
+        function symbolToString(symbol, enclosingDeclaration, meaning) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function signatureToString(signature, enclosingDeclaration, flags, kind) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function typeToString(type, enclosingDeclaration, flags) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            var maxLength = compilerOptions.noErrorTruncation || flags & 4 /* NoTruncation */ ? undefined : 100;
+            if (maxLength && result.length >= maxLength) {
+                result = result.substr(0, maxLength - "...".length) + "...";
+            }
+            return result;
+        }
+        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function visibilityToString(flags) {
+            if (flags === 8 /* Private */) {
+                return "private";
+            }
+            if (flags === 16 /* Protected */) {
+                return "protected";
+            }
+            return "public";
+        }
+        function getTypeAliasForTypeLiteral(type) {
+            if (type.symbol && type.symbol.flags & 2048 /* TypeLiteral */) {
+                var node = type.symbol.declarations[0].parent;
+                while (node.kind === 164 /* ParenthesizedType */) {
+                    node = node.parent;
+                }
+                if (node.kind === 223 /* TypeAliasDeclaration */) {
+                    return getSymbolOfNode(node);
+                }
+            }
+            return undefined;
+        }
+        function isTopLevelInExternalModuleAugmentation(node) {
+            return node && node.parent &&
+                node.parent.kind === 226 /* ModuleBlock */ &&
+                ts.isExternalModuleAugmentation(node.parent.parent);
+        }
+        function getSymbolDisplayBuilder() {
+            function getNameOfSymbol(symbol) {
+                if (symbol.declarations && symbol.declarations.length) {
+                    var declaration = symbol.declarations[0];
+                    if (declaration.name) {
+                        return ts.declarationNameToString(declaration.name);
+                    }
+                    switch (declaration.kind) {
+                        case 192 /* ClassExpression */:
+                            return "(Anonymous class)";
+                        case 179 /* FunctionExpression */:
+                        case 180 /* ArrowFunction */:
+                            return "(Anonymous function)";
+                    }
+                }
+                return symbol.name;
+            }
+            /**
+             * Writes only the name of the symbol out to the writer. Uses the original source text
+             * for the name of the symbol if it is available to match how the user wrote the name.
+             */
+            function appendSymbolNameOnly(symbol, writer) {
+                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
+            }
+            /**
+             * Writes a property access or element access with the name of the symbol out to the writer.
+             * Uses the original source text for the name of the symbol if it is available to match how the user wrote the name,
+             * ensuring that any names written with literals use element accesses.
+             */
+            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
+                var symbolName = getNameOfSymbol(symbol);
+                var firstChar = symbolName.charCodeAt(0);
+                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
+                if (needsElementAccess) {
+                    writePunctuation(writer, 19 /* OpenBracketToken */);
+                    if (ts.isSingleOrDoubleQuote(firstChar)) {
+                        writer.writeStringLiteral(symbolName);
+                    }
+                    else {
+                        writer.writeSymbol(symbolName, symbol);
+                    }
+                    writePunctuation(writer, 20 /* CloseBracketToken */);
+                }
+                else {
+                    writePunctuation(writer, 21 /* DotToken */);
+                    writer.writeSymbol(symbolName, symbol);
+                }
+            }
+            /**
+             * Enclosing declaration is optional when we don't want to get qualified name in the enclosing declaration scope
+             * Meaning needs to be specified if the enclosing declaration is given
+             */
+            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
+                var parentSymbol;
+                function appendParentTypeArgumentsAndSymbolName(symbol) {
+                    if (parentSymbol) {
+                        // Write type arguments of instantiated class/interface here
+                        if (flags & 1 /* WriteTypeParametersOrArguments */) {
+                            if (symbol.flags & 16777216 /* Instantiated */) {
+                                buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration);
+                            }
+                            else {
+                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
+                            }
+                        }
+                        appendPropertyOrElementAccessForSymbol(symbol, writer);
+                    }
+                    else {
+                        appendSymbolNameOnly(symbol, writer);
+                    }
+                    parentSymbol = symbol;
+                }
+                // const the writer know we just wrote out a symbol.  The declaration emitter writer uses
+                // this to determine if an import it has previously seen (and not written out) needs
+                // to be written to the file once the walk of the tree is complete.
+                //
+                // NOTE(cyrusn): This approach feels somewhat unfortunate.  A simple pass over the tree
+                // up front (for example, during checking) could determine if we need to emit the imports
+                // and we could then access that data during declaration emit.
+                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
+                function walkSymbol(symbol, meaning) {
+                    if (symbol) {
+                        var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2 /* UseOnlyExternalAliasing */));
+                        if (!accessibleSymbolChain ||
+                            needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
+                            // Go up and add our parent.
+                            walkSymbol(getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol), getQualifiedLeftMeaning(meaning));
+                        }
+                        if (accessibleSymbolChain) {
+                            for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
+                                var accessibleSymbol = accessibleSymbolChain_1[_i];
+                                appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
+                            }
+                        }
+                        else {
+                            // If we didn't find accessible symbol chain for this symbol, break if this is external module
+                            if (!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) {
+                                return;
+                            }
+                            // if this is anonymous type break
+                            if (symbol.flags & 2048 /* TypeLiteral */ || symbol.flags & 4096 /* ObjectLiteral */) {
+                                return;
+                            }
+                            appendParentTypeArgumentsAndSymbolName(symbol);
+                        }
+                    }
+                }
+                // Get qualified name if the symbol is not a type parameter
+                // and there is an enclosing declaration or we specifically
+                // asked for it
+                var isTypeParameter = symbol.flags & 262144 /* TypeParameter */;
+                var typeFormatFlag = 128 /* UseFullyQualifiedType */ & typeFlags;
+                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
+                    walkSymbol(symbol, meaning);
+                    return;
+                }
+                return appendParentTypeArgumentsAndSymbolName(symbol);
+            }
+            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
+                var globalFlagsToPass = globalFlags & 16 /* WriteOwnNameForAnyLike */;
+                var inObjectTypeLiteral = false;
+                return writeType(type, globalFlags);
+                function writeType(type, flags) {
+                    // Write undefined/null type as any
+                    if (type.flags & 150995071 /* Intrinsic */) {
+                        // Special handling for unknown / resolving types, they should show up as any and not unknown or __resolving
+                        writer.writeKeyword(!(globalFlags & 16 /* WriteOwnNameForAnyLike */) && isTypeAny(type)
+                            ? "any"
+                            : type.intrinsicName);
+                    }
+                    else if (type.flags & 33554432 /* ThisType */) {
+                        if (inObjectTypeLiteral) {
+                            writer.reportInaccessibleThisError();
+                        }
+                        writer.writeKeyword("this");
+                    }
+                    else if (type.flags & 4096 /* Reference */) {
+                        writeTypeReference(type, flags);
+                    }
+                    else if (type.flags & (1024 /* Class */ | 2048 /* Interface */ | 128 /* Enum */ | 512 /* TypeParameter */)) {
+                        // The specified symbol flags need to be reinterpreted as type flags
+                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793056 /* Type */, 0 /* None */, flags);
+                    }
+                    else if (type.flags & 8192 /* Tuple */) {
+                        writeTupleType(type);
+                    }
+                    else if (type.flags & 49152 /* UnionOrIntersection */) {
+                        writeUnionOrIntersectionType(type, flags);
+                    }
+                    else if (type.flags & 65536 /* Anonymous */) {
+                        writeAnonymousType(type, flags);
+                    }
+                    else if (type.flags & 256 /* StringLiteral */) {
+                        writer.writeStringLiteral("\"" + ts.escapeString(type.text) + "\"");
+                    }
+                    else {
+                        // Should never get here
+                        // { ... }
+                        writePunctuation(writer, 15 /* OpenBraceToken */);
+                        writeSpace(writer);
+                        writePunctuation(writer, 22 /* DotDotDotToken */);
+                        writeSpace(writer);
+                        writePunctuation(writer, 16 /* CloseBraceToken */);
+                    }
+                }
+                function writeTypeList(types, delimiter) {
+                    for (var i = 0; i < types.length; i++) {
+                        if (i > 0) {
+                            if (delimiter !== 24 /* CommaToken */) {
+                                writeSpace(writer);
+                            }
+                            writePunctuation(writer, delimiter);
+                            writeSpace(writer);
+                        }
+                        writeType(types[i], delimiter === 24 /* CommaToken */ ? 0 /* None */ : 64 /* InElementType */);
+                    }
+                }
+                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
+                    // Unnamed function expressions and arrow functions have reserved names that we don't want to display
+                    if (symbol.flags & 32 /* Class */ || !isReservedMemberName(symbol.name)) {
+                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793056 /* Type */, 0 /* None */, flags);
+                    }
+                    if (pos < end) {
+                        writePunctuation(writer, 25 /* LessThanToken */);
+                        writeType(typeArguments[pos], 256 /* InFirstTypeArgument */);
+                        pos++;
+                        while (pos < end) {
+                            writePunctuation(writer, 24 /* CommaToken */);
+                            writeSpace(writer);
+                            writeType(typeArguments[pos], 0 /* None */);
+                            pos++;
+                        }
+                        writePunctuation(writer, 27 /* GreaterThanToken */);
+                    }
+                }
+                function writeTypeReference(type, flags) {
+                    var typeArguments = type.typeArguments || emptyArray;
+                    if (type.target === globalArrayType && !(flags & 1 /* WriteArrayAsGenericType */)) {
+                        writeType(typeArguments[0], 64 /* InElementType */);
+                        writePunctuation(writer, 19 /* OpenBracketToken */);
+                        writePunctuation(writer, 20 /* CloseBracketToken */);
+                    }
+                    else {
+                        // Write the type reference in the format f<A>.g<B>.C<X, Y> where A and B are type arguments
+                        // for outer type parameters, and f and g are the respective declaring containers of those
+                        // type parameters.
+                        var outerTypeParameters = type.target.outerTypeParameters;
+                        var i = 0;
+                        if (outerTypeParameters) {
+                            var length_1 = outerTypeParameters.length;
+                            while (i < length_1) {
+                                // Find group of type arguments for type parameters with the same declaring container.
+                                var start = i;
+                                var parent_7 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
+                                do {
+                                    i++;
+                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_7);
+                                // When type parameters are their own type arguments for the whole group (i.e. we have
+                                // the default outer type arguments), we don't show the group.
+                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
+                                    writeSymbolTypeReference(parent_7, typeArguments, start, i, flags);
+                                    writePunctuation(writer, 21 /* DotToken */);
+                                }
+                            }
+                        }
+                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
+                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
+                    }
+                }
+                function writeTupleType(type) {
+                    writePunctuation(writer, 19 /* OpenBracketToken */);
+                    writeTypeList(type.elementTypes, 24 /* CommaToken */);
+                    writePunctuation(writer, 20 /* CloseBracketToken */);
+                }
+                function writeUnionOrIntersectionType(type, flags) {
+                    if (flags & 64 /* InElementType */) {
+                        writePunctuation(writer, 17 /* OpenParenToken */);
+                    }
+                    writeTypeList(type.types, type.flags & 16384 /* Union */ ? 47 /* BarToken */ : 46 /* AmpersandToken */);
+                    if (flags & 64 /* InElementType */) {
+                        writePunctuation(writer, 18 /* CloseParenToken */);
+                    }
+                }
+                function writeAnonymousType(type, flags) {
+                    var symbol = type.symbol;
+                    if (symbol) {
+                        // Always use 'typeof T' for type of class, enum, and module objects
+                        if (symbol.flags & (32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (shouldWriteTypeOfFunctionSymbol()) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (ts.contains(symbolStack, symbol)) {
+                            // If type is an anonymous type literal in a type alias declaration, use type alias name
+                            var typeAlias = getTypeAliasForTypeLiteral(type);
+                            if (typeAlias) {
+                                // The specified symbol flags need to be reinterpreted as type flags
+                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793056 /* Type */, 0 /* None */, flags);
+                            }
+                            else {
+                                // Recursive usage, use any
+                                writeKeyword(writer, 117 /* AnyKeyword */);
+                            }
+                        }
+                        else {
+                            // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
+                            // of types allows us to catch circular references to instantiations of the same anonymous type
+                            if (!symbolStack) {
+                                symbolStack = [];
+                            }
+                            symbolStack.push(symbol);
+                            writeLiteralType(type, flags);
+                            symbolStack.pop();
+                        }
+                    }
+                    else {
+                        // Anonymous types with no symbol are never circular
+                        writeLiteralType(type, flags);
+                    }
+                    function shouldWriteTypeOfFunctionSymbol() {
+                        var isStaticMethodSymbol = !!(symbol.flags & 8192 /* Method */ &&
+                            ts.forEach(symbol.declarations, function (declaration) { return declaration.flags & 32 /* Static */; }));
+                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16 /* Function */) &&
+                            (symbol.parent ||
+                                ts.forEach(symbol.declarations, function (declaration) {
+                                    return declaration.parent.kind === 256 /* SourceFile */ || declaration.parent.kind === 226 /* ModuleBlock */;
+                                }));
+                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
+                            // typeof is allowed only for static/non local functions
+                            return !!(flags & 2 /* UseTypeOfFunction */) ||
+                                (ts.contains(symbolStack, symbol)); // it is type of the symbol uses itself recursively
+                        }
+                    }
+                }
+                function writeTypeOfSymbol(type, typeFormatFlags) {
+                    writeKeyword(writer, 101 /* TypeOfKeyword */);
+                    writeSpace(writer);
+                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455 /* Value */, 0 /* None */, typeFormatFlags);
+                }
+                function writeIndexSignature(info, keyword) {
+                    if (info) {
+                        if (info.isReadonly) {
+                            writeKeyword(writer, 128 /* ReadonlyKeyword */);
+                            writeSpace(writer);
+                        }
+                        writePunctuation(writer, 19 /* OpenBracketToken */);
+                        writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
+                        writePunctuation(writer, 54 /* ColonToken */);
+                        writeSpace(writer);
+                        writeKeyword(writer, keyword);
+                        writePunctuation(writer, 20 /* CloseBracketToken */);
+                        writePunctuation(writer, 54 /* ColonToken */);
+                        writeSpace(writer);
+                        writeType(info.type, 0 /* None */);
+                        writePunctuation(writer, 23 /* SemicolonToken */);
+                        writer.writeLine();
+                    }
+                }
+                function writePropertyWithModifiers(prop) {
+                    if (isReadonlySymbol(prop)) {
+                        writeKeyword(writer, 128 /* ReadonlyKeyword */);
+                        writeSpace(writer);
+                    }
+                    buildSymbolDisplay(prop, writer);
+                    if (prop.flags & 536870912 /* Optional */) {
+                        writePunctuation(writer, 53 /* QuestionToken */);
+                    }
+                }
+                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
+                    if (flags & 64 /* InElementType */) {
+                        return true;
+                    }
+                    else if (flags & 256 /* InFirstTypeArgument */) {
+                        // Add parenthesis around function type for the first type argument to avoid ambiguity
+                        var typeParameters = callSignature.target && (flags & 32 /* WriteTypeArgumentsOfSignature */) ?
+                            callSignature.target.typeParameters : callSignature.typeParameters;
+                        return typeParameters && typeParameters.length !== 0;
+                    }
+                    return false;
+                }
+                function writeLiteralType(type, flags) {
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
+                            writePunctuation(writer, 15 /* OpenBraceToken */);
+                            writePunctuation(writer, 16 /* CloseBraceToken */);
+                            return;
+                        }
+                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
+                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 17 /* OpenParenToken */);
+                            }
+                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 18 /* CloseParenToken */);
+                            }
+                            return;
+                        }
+                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
+                            if (flags & 64 /* InElementType */) {
+                                writePunctuation(writer, 17 /* OpenParenToken */);
+                            }
+                            writeKeyword(writer, 92 /* NewKeyword */);
+                            writeSpace(writer);
+                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
+                            if (flags & 64 /* InElementType */) {
+                                writePunctuation(writer, 18 /* CloseParenToken */);
+                            }
+                            return;
+                        }
+                    }
+                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
+                    inObjectTypeLiteral = true;
+                    writePunctuation(writer, 15 /* OpenBraceToken */);
+                    writer.writeLine();
+                    writer.increaseIndent();
+                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
+                        var signature = _a[_i];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
+                        writePunctuation(writer, 23 /* SemicolonToken */);
+                        writer.writeLine();
+                    }
+                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
+                        var signature = _c[_b];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1 /* Construct */, symbolStack);
+                        writePunctuation(writer, 23 /* SemicolonToken */);
+                        writer.writeLine();
+                    }
+                    writeIndexSignature(resolved.stringIndexInfo, 132 /* StringKeyword */);
+                    writeIndexSignature(resolved.numberIndexInfo, 130 /* NumberKeyword */);
+                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
+                        var p = _e[_d];
+                        var t = getTypeOfSymbol(p);
+                        if (p.flags & (16 /* Function */ | 8192 /* Method */) && !getPropertiesOfObjectType(t).length) {
+                            var signatures = getSignaturesOfType(t, 0 /* Call */);
+                            for (var _f = 0, signatures_1 = signatures; _f < signatures_1.length; _f++) {
+                                var signature = signatures_1[_f];
+                                writePropertyWithModifiers(p);
+                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
+                                writePunctuation(writer, 23 /* SemicolonToken */);
+                                writer.writeLine();
+                            }
+                        }
+                        else {
+                            writePropertyWithModifiers(p);
+                            writePunctuation(writer, 54 /* ColonToken */);
+                            writeSpace(writer);
+                            writeType(t, 0 /* None */);
+                            writePunctuation(writer, 23 /* SemicolonToken */);
+                            writer.writeLine();
+                        }
+                    }
+                    writer.decreaseIndent();
+                    writePunctuation(writer, 16 /* CloseBraceToken */);
+                    inObjectTypeLiteral = saveInObjectTypeLiteral;
+                }
+            }
+            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
+                var targetSymbol = getTargetSymbol(symbol);
+                if (targetSymbol.flags & 32 /* Class */ || targetSymbol.flags & 64 /* Interface */ || targetSymbol.flags & 524288 /* TypeAlias */) {
+                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
+                }
+            }
+            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
+                appendSymbolNameOnly(tp.symbol, writer);
+                var constraint = getConstraintOfTypeParameter(tp);
+                if (constraint) {
+                    writeSpace(writer);
+                    writeKeyword(writer, 83 /* ExtendsKeyword */);
+                    writeSpace(writer);
+                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
+                }
+            }
+            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
+                var parameterNode = p.valueDeclaration;
+                if (ts.isRestParameter(parameterNode)) {
+                    writePunctuation(writer, 22 /* DotDotDotToken */);
+                }
+                if (ts.isBindingPattern(parameterNode.name)) {
+                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    appendSymbolNameOnly(p, writer);
+                }
+                if (isOptionalParameter(parameterNode)) {
+                    writePunctuation(writer, 53 /* QuestionToken */);
+                }
+                writePunctuation(writer, 54 /* ColonToken */);
+                writeSpace(writer);
+                buildTypeDisplay(getTypeOfSymbol(p), writer, enclosingDeclaration, flags, symbolStack);
+            }
+            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
+                // We have to explicitly emit square bracket and bracket because these tokens are not stored inside the node.
+                if (bindingPattern.kind === 167 /* ObjectBindingPattern */) {
+                    writePunctuation(writer, 15 /* OpenBraceToken */);
+                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 16 /* CloseBraceToken */);
+                }
+                else if (bindingPattern.kind === 168 /* ArrayBindingPattern */) {
+                    writePunctuation(writer, 19 /* OpenBracketToken */);
+                    var elements = bindingPattern.elements;
+                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    if (elements && elements.hasTrailingComma) {
+                        writePunctuation(writer, 24 /* CommaToken */);
+                    }
+                    writePunctuation(writer, 20 /* CloseBracketToken */);
+                }
+            }
+            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
+                if (bindingElement.kind === 193 /* OmittedExpression */) {
+                    return;
+                }
+                ts.Debug.assert(bindingElement.kind === 169 /* BindingElement */);
+                if (bindingElement.propertyName) {
+                    writer.writeSymbol(ts.getTextOfNode(bindingElement.propertyName), bindingElement.symbol);
+                    writePunctuation(writer, 54 /* ColonToken */);
+                    writeSpace(writer);
+                }
+                if (ts.isBindingPattern(bindingElement.name)) {
+                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    if (bindingElement.dotDotDotToken) {
+                        writePunctuation(writer, 22 /* DotDotDotToken */);
+                    }
+                    appendSymbolNameOnly(bindingElement.symbol, writer);
+                }
+            }
+            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 25 /* LessThanToken */);
+                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 27 /* GreaterThanToken */);
+                }
+            }
+            function buildDisplayForCommaSeparatedList(list, writer, action) {
+                for (var i = 0; i < list.length; i++) {
+                    if (i > 0) {
+                        writePunctuation(writer, 24 /* CommaToken */);
+                        writeSpace(writer);
+                    }
+                    action(list[i]);
+                }
+            }
+            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration, flags, symbolStack) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 25 /* LessThanToken */);
+                    var flags_1 = 256 /* InFirstTypeArgument */;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (i > 0) {
+                            writePunctuation(writer, 24 /* CommaToken */);
+                            writeSpace(writer);
+                            flags_1 = 0 /* None */;
+                        }
+                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags_1);
+                    }
+                    writePunctuation(writer, 27 /* GreaterThanToken */);
+                }
+            }
+            function buildDisplayForParametersAndDelimiters(thisType, parameters, writer, enclosingDeclaration, flags, symbolStack) {
+                writePunctuation(writer, 17 /* OpenParenToken */);
+                if (thisType) {
+                    writeKeyword(writer, 97 /* ThisKeyword */);
+                    writePunctuation(writer, 54 /* ColonToken */);
+                    writeSpace(writer);
+                    buildTypeDisplay(thisType, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                for (var i = 0; i < parameters.length; i++) {
+                    if (i > 0 || thisType) {
+                        writePunctuation(writer, 24 /* CommaToken */);
+                        writeSpace(writer);
+                    }
+                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
+                }
+                writePunctuation(writer, 18 /* CloseParenToken */);
+            }
+            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    writer.writeParameter(predicate.parameterName);
+                }
+                else {
+                    writeKeyword(writer, 97 /* ThisKeyword */);
+                }
+                writeSpace(writer);
+                writeKeyword(writer, 124 /* IsKeyword */);
+                writeSpace(writer);
+                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
+            }
+            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
+                if (flags & 8 /* WriteArrowStyleSignature */) {
+                    writeSpace(writer);
+                    writePunctuation(writer, 34 /* EqualsGreaterThanToken */);
+                }
+                else {
+                    writePunctuation(writer, 54 /* ColonToken */);
+                }
+                writeSpace(writer);
+                if (signature.typePredicate) {
+                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    var returnType = getReturnTypeOfSignature(signature);
+                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
+                }
+            }
+            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
+                if (kind === 1 /* Construct */) {
+                    writeKeyword(writer, 92 /* NewKeyword */);
+                    writeSpace(writer);
+                }
+                if (signature.target && (flags & 32 /* WriteTypeArgumentsOfSignature */)) {
+                    // Instantiated signature, write type arguments instead
+                    // This is achieved by passing in the mapper separately
+                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
+                }
+                else {
+                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                buildDisplayForParametersAndDelimiters(signature.thisType, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
+                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
+            }
+            return _displayBuilder || (_displayBuilder = {
+                buildSymbolDisplay: buildSymbolDisplay,
+                buildTypeDisplay: buildTypeDisplay,
+                buildTypeParameterDisplay: buildTypeParameterDisplay,
+                buildTypePredicateDisplay: buildTypePredicateDisplay,
+                buildParameterDisplay: buildParameterDisplay,
+                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
+                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
+                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
+                buildSignatureDisplay: buildSignatureDisplay,
+                buildReturnTypeDisplay: buildReturnTypeDisplay
+            });
+        }
+        function isDeclarationVisible(node) {
+            if (node) {
+                var links = getNodeLinks(node);
+                if (links.isVisible === undefined) {
+                    links.isVisible = !!determineIfDeclarationIsVisible();
+                }
+                return links.isVisible;
+            }
+            return false;
+            function determineIfDeclarationIsVisible() {
+                switch (node.kind) {
+                    case 169 /* BindingElement */:
+                        return isDeclarationVisible(node.parent.parent);
+                    case 218 /* VariableDeclaration */:
+                        if (ts.isBindingPattern(node.name) &&
+                            !node.name.elements.length) {
+                            // If the binding pattern is empty, this variable declaration is not visible
+                            return false;
+                        }
+                    // Otherwise fall through
+                    case 225 /* ModuleDeclaration */:
+                    case 221 /* ClassDeclaration */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 223 /* TypeAliasDeclaration */:
+                    case 220 /* FunctionDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 229 /* ImportEqualsDeclaration */:
+                        // external module augmentation is always visible
+                        if (ts.isExternalModuleAugmentation(node)) {
+                            return true;
+                        }
+                        var parent_8 = getDeclarationContainer(node);
+                        // If the node is not exported or it is not ambient module element (except import declaration)
+                        if (!(ts.getCombinedNodeFlags(node) & 1 /* Export */) &&
+                            !(node.kind !== 229 /* ImportEqualsDeclaration */ && parent_8.kind !== 256 /* SourceFile */ && ts.isInAmbientContext(parent_8))) {
+                            return isGlobalSourceFile(parent_8);
+                        }
+                        // Exported members/ambient module elements (exception import declaration) are visible if parent is visible
+                        return isDeclarationVisible(parent_8);
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        if (node.flags & (8 /* Private */ | 16 /* Protected */)) {
+                            // Private/protected properties/methods are not visible
+                            return false;
+                        }
+                    // Public properties/methods are visible if its parents are visible, so const it fall into next case statement
+                    case 148 /* Constructor */:
+                    case 152 /* ConstructSignature */:
+                    case 151 /* CallSignature */:
+                    case 153 /* IndexSignature */:
+                    case 142 /* Parameter */:
+                    case 226 /* ModuleBlock */:
+                    case 156 /* FunctionType */:
+                    case 157 /* ConstructorType */:
+                    case 159 /* TypeLiteral */:
+                    case 155 /* TypeReference */:
+                    case 160 /* ArrayType */:
+                    case 161 /* TupleType */:
+                    case 162 /* UnionType */:
+                    case 163 /* IntersectionType */:
+                    case 164 /* ParenthesizedType */:
+                        return isDeclarationVisible(node.parent);
+                    // Default binding, import specifier and namespace import is visible
+                    // only on demand so by default it is not visible
+                    case 231 /* ImportClause */:
+                    case 232 /* NamespaceImport */:
+                    case 234 /* ImportSpecifier */:
+                        return false;
+                    // Type parameters are always visible
+                    case 141 /* TypeParameter */:
+                    // Source file is always visible
+                    case 256 /* SourceFile */:
+                        return true;
+                    // Export assignments do not create name bindings outside the module
+                    case 235 /* ExportAssignment */:
+                        return false;
+                    default:
+                        return false;
+                }
+            }
+        }
+        function collectLinkedAliases(node) {
+            var exportSymbol;
+            if (node.parent && node.parent.kind === 235 /* ExportAssignment */) {
+                exportSymbol = resolveName(node.parent, node.text, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */, ts.Diagnostics.Cannot_find_name_0, node);
+            }
+            else if (node.parent.kind === 238 /* ExportSpecifier */) {
+                var exportSpecifier = node.parent;
+                exportSymbol = exportSpecifier.parent.parent.moduleSpecifier ?
+                    getExternalModuleMember(exportSpecifier.parent.parent, exportSpecifier) :
+                    resolveEntityName(exportSpecifier.propertyName || exportSpecifier.name, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */);
+            }
+            var result = [];
+            if (exportSymbol) {
+                buildVisibleNodeList(exportSymbol.declarations);
+            }
+            return result;
+            function buildVisibleNodeList(declarations) {
+                ts.forEach(declarations, function (declaration) {
+                    getNodeLinks(declaration).isVisible = true;
+                    var resultNode = getAnyImportSyntax(declaration) || declaration;
+                    if (!ts.contains(result, resultNode)) {
+                        result.push(resultNode);
+                    }
+                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
+                        // Add the referenced top container visible
+                        var internalModuleReference = declaration.moduleReference;
+                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
+                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */, undefined, undefined);
+                        if (importSymbol) {
+                            buildVisibleNodeList(importSymbol.declarations);
+                        }
+                    }
+                });
+            }
+        }
+        /**
+         * Push an entry on the type resolution stack. If an entry with the given target and the given property name
+         * is already on the stack, and no entries in between already have a type, then a circularity has occurred.
+         * In this case, the result values of the existing entry and all entries pushed after it are changed to false,
+         * and the value false is returned. Otherwise, the new entry is just pushed onto the stack, and true is returned.
+         * In order to see if the same query has already been done before, the target object and the propertyName both
+         * must match the one passed in.
+         *
+         * @param target The symbol, type, or signature whose type is being queried
+         * @param propertyName The property name that should be used to query the target for its type
+         */
+        function pushTypeResolution(target, propertyName) {
+            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
+            if (resolutionCycleStartIndex >= 0) {
+                // A cycle was found
+                var length_2 = resolutionTargets.length;
+                for (var i = resolutionCycleStartIndex; i < length_2; i++) {
+                    resolutionResults[i] = false;
+                }
+                return false;
+            }
+            resolutionTargets.push(target);
+            resolutionResults.push(/*items*/ true);
+            resolutionPropertyNames.push(propertyName);
+            return true;
+        }
+        function findResolutionCycleStartIndex(target, propertyName) {
+            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
+                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
+                    return -1;
+                }
+                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+        function hasType(target, propertyName) {
+            if (propertyName === 0 /* Type */) {
+                return getSymbolLinks(target).type;
+            }
+            if (propertyName === 2 /* DeclaredType */) {
+                return getSymbolLinks(target).declaredType;
+            }
+            if (propertyName === 1 /* ResolvedBaseConstructorType */) {
+                ts.Debug.assert(!!(target.flags & 1024 /* Class */));
+                return target.resolvedBaseConstructorType;
+            }
+            if (propertyName === 3 /* ResolvedReturnType */) {
+                return target.resolvedReturnType;
+            }
+            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
+        }
+        // Pop an entry from the type resolution stack and return its associated result value. The result value will
+        // be true if no circularities were detected, or false if a circularity was found.
+        function popTypeResolution() {
+            resolutionTargets.pop();
+            resolutionPropertyNames.pop();
+            return resolutionResults.pop();
+        }
+        function getDeclarationContainer(node) {
+            node = ts.getRootDeclaration(node);
+            while (node) {
+                switch (node.kind) {
+                    case 218 /* VariableDeclaration */:
+                    case 219 /* VariableDeclarationList */:
+                    case 234 /* ImportSpecifier */:
+                    case 233 /* NamedImports */:
+                    case 232 /* NamespaceImport */:
+                    case 231 /* ImportClause */:
+                        node = node.parent;
+                        break;
+                    default:
+                        return node.parent;
+                }
+            }
+        }
+        function getTypeOfPrototypeProperty(prototype) {
+            // TypeScript 1.0 spec (April 2014): 8.4
+            // Every class automatically contains a static property member named 'prototype',
+            // the type of which is an instantiation of the class type with type Any supplied as a type argument for each type parameter.
+            // It is an error to explicitly declare a static property member with the name 'prototype'.
+            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
+            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
+        }
+        // Return the type of the given property in the given type, or undefined if no such property exists
+        function getTypeOfPropertyOfType(type, name) {
+            var prop = getPropertyOfType(type, name);
+            return prop ? getTypeOfSymbol(prop) : undefined;
+        }
+        function isTypeAny(type) {
+            return type && (type.flags & 1 /* Any */) !== 0;
+        }
+        // Return the type of a binding element parent. We check SymbolLinks first to see if a type has been
+        // assigned by contextual typing.
+        function getTypeForBindingElementParent(node) {
+            var symbol = getSymbolOfNode(node);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false);
+        }
+        function getTextOfPropertyName(name) {
+            switch (name.kind) {
+                case 69 /* Identifier */:
+                    return name.text;
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                    return name.text;
+                case 140 /* ComputedPropertyName */:
+                    if (ts.isStringOrNumericLiteral(name.expression.kind)) {
+                        return name.expression.text;
+                    }
+            }
+            return undefined;
+        }
+        function isComputedNonLiteralName(name) {
+            return name.kind === 140 /* ComputedPropertyName */ && !ts.isStringOrNumericLiteral(name.expression.kind);
+        }
+        /** Return the inferred type for a binding element */
+        function getTypeForBindingElement(declaration) {
+            var pattern = declaration.parent;
+            var parentType = getTypeForBindingElementParent(pattern.parent);
+            // If parent has the unknown (error) type, then so does this binding element
+            if (parentType === unknownType) {
+                return unknownType;
+            }
+            // If no type was specified or inferred for parent, or if the specified or inferred type is any,
+            // infer from the initializer of the binding element if one is present. Otherwise, go with the
+            // undefined or any type of the parent.
+            if (!parentType || isTypeAny(parentType)) {
+                if (declaration.initializer) {
+                    return checkExpressionCached(declaration.initializer);
+                }
+                return parentType;
+            }
+            var type;
+            if (pattern.kind === 167 /* ObjectBindingPattern */) {
+                // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form)
+                var name_11 = declaration.propertyName || declaration.name;
+                if (isComputedNonLiteralName(name_11)) {
+                    // computed properties with non-literal names are treated as 'any'
+                    return anyType;
+                }
+                if (declaration.initializer) {
+                    getContextualType(declaration.initializer);
+                }
+                // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature,
+                // or otherwise the type of the string index signature.
+                var text = getTextOfPropertyName(name_11);
+                type = getTypeOfPropertyOfType(parentType, text) ||
+                    isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1 /* Number */) ||
+                    getIndexTypeOfType(parentType, 0 /* String */);
+                if (!type) {
+                    error(name_11, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_11));
+                    return unknownType;
+                }
+            }
+            else {
+                // This elementType will be used if the specific property corresponding to this index is not
+                // present (aka the tuple element property). This call also checks that the parentType is in
+                // fact an iterable or array (depending on target language).
+                var elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false);
+                if (!declaration.dotDotDotToken) {
+                    // Use specific property type when parent is a tuple or numeric index type when parent is an array
+                    var propName = "" + ts.indexOf(pattern.elements, declaration);
+                    type = isTupleLikeType(parentType)
+                        ? getTypeOfPropertyOfType(parentType, propName)
+                        : elementType;
+                    if (!type) {
+                        if (isTupleType(parentType)) {
+                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), parentType.elementTypes.length, pattern.elements.length);
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
+                        }
+                        return unknownType;
+                    }
+                }
+                else {
+                    // Rest element has an array type with the same element type as the parent type
+                    type = createArrayType(elementType);
+                }
+            }
+            // In strict null checking mode, if a default value of a non-undefined type is specified, remove
+            // undefined from the final type.
+            if (strictNullChecks && declaration.initializer && !(getCombinedTypeFlags(checkExpressionCached(declaration.initializer)) & 32 /* Undefined */)) {
+                type = getTypeWithFacts(type, 131072 /* NEUndefined */);
+            }
+            return type;
+        }
+        function getTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
+            var jsDocType = getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration);
+            if (jsDocType) {
+                return getTypeFromTypeNode(jsDocType);
+            }
+        }
+        function getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
+            // First, see if this node has an @type annotation on it directly.
+            var typeTag = ts.getJSDocTypeTag(declaration);
+            if (typeTag && typeTag.typeExpression) {
+                return typeTag.typeExpression.type;
+            }
+            if (declaration.kind === 218 /* VariableDeclaration */ &&
+                declaration.parent.kind === 219 /* VariableDeclarationList */ &&
+                declaration.parent.parent.kind === 200 /* VariableStatement */) {
+                // @type annotation might have been on the variable statement, try that instead.
+                var annotation = ts.getJSDocTypeTag(declaration.parent.parent);
+                if (annotation && annotation.typeExpression) {
+                    return annotation.typeExpression.type;
+                }
+            }
+            else if (declaration.kind === 142 /* Parameter */) {
+                // If it's a parameter, see if the parent has a jsdoc comment with an @param
+                // annotation.
+                var paramTag = ts.getCorrespondingJSDocParameterTag(declaration);
+                if (paramTag && paramTag.typeExpression) {
+                    return paramTag.typeExpression.type;
+                }
+            }
+            return undefined;
+        }
+        function addOptionality(type, optional) {
+            return strictNullChecks && optional ? addTypeKind(type, 32 /* Undefined */) : type;
+        }
+        // Return the inferred type for a variable, parameter, or property declaration
+        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
+            if (declaration.flags & 134217728 /* JavaScriptFile */) {
+                // If this is a variable in a JavaScript file, then use the JSDoc type (if it has
+                // one as its type), otherwise fallback to the below standard TS codepaths to
+                // try to figure it out.
+                var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            // A variable declared in a for..in statement is always of type string
+            if (declaration.parent.parent.kind === 207 /* ForInStatement */) {
+                return stringType;
+            }
+            if (declaration.parent.parent.kind === 208 /* ForOfStatement */) {
+                // checkRightHandSideOfForOf will return undefined if the for-of expression type was
+                // missing properties/signatures required to get its iteratedType (like
+                // [Symbol.iterator] or next). This may be because we accessed properties from anyType,
+                // or it may have led to an error inside getElementTypeOfIterable.
+                return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType;
+            }
+            if (ts.isBindingPattern(declaration.parent)) {
+                return getTypeForBindingElement(declaration);
+            }
+            // Use type from type annotation if one is present
+            if (declaration.type) {
+                return addOptionality(getTypeFromTypeNode(declaration.type), /*optional*/ declaration.questionToken && includeOptionality);
+            }
+            if (declaration.kind === 142 /* Parameter */) {
+                var func = declaration.parent;
+                // For a parameter of a set accessor, use the type of the get accessor if one is present
+                if (func.kind === 150 /* SetAccessor */ && !ts.hasDynamicName(func)) {
+                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149 /* GetAccessor */);
+                    if (getter) {
+                        var signature = getSignatureFromDeclaration(getter);
+                        var thisParameter = getAccessorThisParameter(func);
+                        if (thisParameter && declaration === thisParameter) {
+                            return signature.thisType;
+                        }
+                        return getReturnTypeOfSignature(signature);
+                    }
+                }
+                // Use contextual parameter type if one is available
+                var type = declaration.symbol.name === "this"
+                    ? getContextuallyTypedThisType(func)
+                    : getContextuallyTypedParameterType(declaration);
+                if (type) {
+                    return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
+                }
+            }
+            // Use the type of the initializer expression if one is present
+            if (declaration.initializer) {
+                return addOptionality(checkExpressionCached(declaration.initializer), /*optional*/ declaration.questionToken && includeOptionality);
+            }
+            // If it is a short-hand property assignment, use the type of the identifier
+            if (declaration.kind === 254 /* ShorthandPropertyAssignment */) {
+                return checkIdentifier(declaration.name);
+            }
+            // If the declaration specifies a binding pattern, use the type implied by the binding pattern
+            if (ts.isBindingPattern(declaration.name)) {
+                return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ false);
+            }
+            // No type specified and nothing can be inferred
+            return undefined;
+        }
+        // Return the type implied by a binding pattern element. This is the type of the initializer of the element if
+        // one is present. Otherwise, if the element is itself a binding pattern, it is the type implied by the binding
+        // pattern. Otherwise, it is the type any.
+        function getTypeFromBindingElement(element, includePatternInType) {
+            if (element.initializer) {
+                var type = checkExpressionCached(element.initializer);
+                reportErrorsFromWidening(element, type);
+                return getWidenedType(type);
+            }
+            if (ts.isBindingPattern(element.name)) {
+                return getTypeFromBindingPattern(element.name, includePatternInType);
+            }
+            if (compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
+                reportImplicitAnyError(element, anyType);
+            }
+            return anyType;
+        }
+        // Return the type implied by an object binding pattern
+        function getTypeFromObjectBindingPattern(pattern, includePatternInType) {
+            var members = {};
+            var hasComputedProperties = false;
+            ts.forEach(pattern.elements, function (e) {
+                var name = e.propertyName || e.name;
+                if (isComputedNonLiteralName(name)) {
+                    // do not include computed properties in the implied type
+                    hasComputedProperties = true;
+                    return;
+                }
+                var text = getTextOfPropertyName(name);
+                var flags = 4 /* Property */ | 67108864 /* Transient */ | (e.initializer ? 536870912 /* Optional */ : 0);
+                var symbol = createSymbol(flags, text);
+                symbol.type = getTypeFromBindingElement(e, includePatternInType);
+                symbol.bindingElement = e;
+                members[symbol.name] = symbol;
+            });
+            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined);
+            if (includePatternInType) {
+                result.pattern = pattern;
+            }
+            if (hasComputedProperties) {
+                result.flags |= 67108864 /* ObjectLiteralPatternWithComputedProperties */;
+            }
+            return result;
+        }
+        // Return the type implied by an array binding pattern
+        function getTypeFromArrayBindingPattern(pattern, includePatternInType) {
+            var elements = pattern.elements;
+            if (elements.length === 0 || elements[elements.length - 1].dotDotDotToken) {
+                return languageVersion >= 2 /* ES6 */ ? createIterableType(anyType) : anyArrayType;
+            }
+            // If the pattern has at least one element, and no rest element, then it should imply a tuple type.
+            var elementTypes = ts.map(elements, function (e) { return e.kind === 193 /* OmittedExpression */ ? anyType : getTypeFromBindingElement(e, includePatternInType); });
+            if (includePatternInType) {
+                var result = createNewTupleType(elementTypes);
+                result.pattern = pattern;
+                return result;
+            }
+            return createTupleType(elementTypes);
+        }
+        // Return the type implied by a binding pattern. This is the type implied purely by the binding pattern itself
+        // and without regard to its context (i.e. without regard any type annotation or initializer associated with the
+        // declaration in which the binding pattern is contained). For example, the implied type of [x, y] is [any, any]
+        // and the implied type of { x, y: z = 1 } is { x: any; y: number; }. The type implied by a binding pattern is
+        // used as the contextual type of an initializer associated with the binding pattern. Also, for a destructuring
+        // parameter with no type annotation or initializer, the type implied by the binding pattern becomes the type of
+        // the parameter.
+        function getTypeFromBindingPattern(pattern, includePatternInType) {
+            return pattern.kind === 167 /* ObjectBindingPattern */
+                ? getTypeFromObjectBindingPattern(pattern, includePatternInType)
+                : getTypeFromArrayBindingPattern(pattern, includePatternInType);
+        }
+        // Return the type associated with a variable, parameter, or property declaration. In the simple case this is the type
+        // specified in a type annotation or inferred from an initializer. However, in the case of a destructuring declaration it
+        // is a bit more involved. For example:
+        //
+        //   var [x, s = ""] = [1, "one"];
+        //
+        // Here, the array literal [1, "one"] is contextually typed by the type [any, string], which is the implied type of the
+        // binding pattern [x, s = ""]. Because the contextual type is a tuple type, the resulting type of [1, "one"] is the
+        // tuple type [number, string]. Thus, the type inferred for 'x' is number and the type inferred for 's' is string.
+        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
+            var type = getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
+            if (type) {
+                if (reportErrors) {
+                    reportErrorsFromWidening(declaration, type);
+                }
+                // During a normal type check we'll never get to here with a property assignment (the check of the containing
+                // object literal uses a different path). We exclude widening only so that language services and type verification
+                // tools see the actual type.
+                if (declaration.kind === 253 /* PropertyAssignment */) {
+                    return type;
+                }
+                return getWidenedType(type);
+            }
+            // Rest parameters default to type any[], other parameters default to type any
+            type = declaration.dotDotDotToken ? anyArrayType : anyType;
+            // Report implicit any errors unless this is a private property within an ambient declaration
+            if (reportErrors && compilerOptions.noImplicitAny) {
+                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
+                    reportImplicitAnyError(declaration, type);
+                }
+            }
+            return type;
+        }
+        function declarationBelongsToPrivateAmbientMember(declaration) {
+            var root = ts.getRootDeclaration(declaration);
+            var memberDeclaration = root.kind === 142 /* Parameter */ ? root.parent : root;
+            return isPrivateWithinAmbient(memberDeclaration);
+        }
+        function getTypeOfVariableOrParameterOrProperty(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                // Handle prototype property
+                if (symbol.flags & 134217728 /* Prototype */) {
+                    return links.type = getTypeOfPrototypeProperty(symbol);
+                }
+                // Handle catch clause variables
+                var declaration = symbol.valueDeclaration;
+                if (declaration.parent.kind === 252 /* CatchClause */) {
+                    return links.type = anyType;
+                }
+                // Handle export default expressions
+                if (declaration.kind === 235 /* ExportAssignment */) {
+                    return links.type = checkExpression(declaration.expression);
+                }
+                // Handle module.exports = expr
+                if (declaration.kind === 187 /* BinaryExpression */) {
+                    return links.type = getUnionType(ts.map(symbol.declarations, function (decl) { return checkExpressionCached(decl.right); }));
+                }
+                if (declaration.kind === 172 /* PropertyAccessExpression */) {
+                    // Declarations only exist for property access expressions for certain
+                    // special assignment kinds
+                    if (declaration.parent.kind === 187 /* BinaryExpression */) {
+                        // Handle exports.p = expr or this.p = expr or className.prototype.method = expr
+                        return links.type = checkExpressionCached(declaration.parent.right);
+                    }
+                }
+                // Handle variable, parameter or property
+                if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                    return unknownType;
+                }
+                var type = getWidenedTypeForVariableLikeDeclaration(declaration, /*reportErrors*/ true);
+                if (!popTypeResolution()) {
+                    if (symbol.valueDeclaration.type) {
+                        // Variable has type annotation that circularly references the variable itself
+                        type = unknownType;
+                        error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
+                    }
+                    else {
+                        // Variable has initializer that circularly references the variable itself
+                        type = anyType;
+                        if (compilerOptions.noImplicitAny) {
+                            error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
+                        }
+                    }
+                }
+                links.type = type;
+            }
+            return links.type;
+        }
+        function getAnnotatedAccessorType(accessor) {
+            if (accessor) {
+                if (accessor.kind === 149 /* GetAccessor */) {
+                    return accessor.type && getTypeFromTypeNode(accessor.type);
+                }
+                else {
+                    var setterTypeAnnotation = ts.getSetAccessorTypeAnnotationNode(accessor);
+                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
+                }
+            }
+            return undefined;
+        }
+        function getAnnotatedAccessorThisType(accessor) {
+            if (accessor) {
+                var parameter = getAccessorThisParameter(accessor);
+                if (parameter && parameter.type) {
+                    return getTypeFromTypeNode(accessor.parameters[0].type);
+                }
+            }
+            return undefined;
+        }
+        function getTypeOfAccessors(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var getter = ts.getDeclarationOfKind(symbol, 149 /* GetAccessor */);
+                var setter = ts.getDeclarationOfKind(symbol, 150 /* SetAccessor */);
+                if (getter && getter.flags & 134217728 /* JavaScriptFile */) {
+                    var jsDocType = getTypeForVariableLikeDeclarationFromJSDocComment(getter);
+                    if (jsDocType) {
+                        return links.type = jsDocType;
+                    }
+                }
+                if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                // First try to see if the user specified a return type on the get-accessor.
+                var getterReturnType = getAnnotatedAccessorType(getter);
+                if (getterReturnType) {
+                    type = getterReturnType;
+                }
+                else {
+                    // If the user didn't specify a return type, try to use the set-accessor's parameter type.
+                    var setterParameterType = getAnnotatedAccessorType(setter);
+                    if (setterParameterType) {
+                        type = setterParameterType;
+                    }
+                    else {
+                        // If there are no specified types, try to infer it from the body of the get accessor if it exists.
+                        if (getter && getter.body) {
+                            type = getReturnTypeFromBody(getter);
+                        }
+                        else {
+                            if (compilerOptions.noImplicitAny) {
+                                error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation, symbolToString(symbol));
+                            }
+                            type = anyType;
+                        }
+                    }
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (compilerOptions.noImplicitAny) {
+                        var getter_1 = ts.getDeclarationOfKind(symbol, 149 /* GetAccessor */);
+                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
+                    }
+                }
+                links.type = type;
+            }
+            return links.type;
+        }
+        function getTypeOfFuncClassEnumModule(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var type = createObjectType(65536 /* Anonymous */, symbol);
+                links.type = strictNullChecks && symbol.flags & 536870912 /* Optional */ ?
+                    addTypeKind(type, 32 /* Undefined */) : type;
+            }
+            return links.type;
+        }
+        function getTypeOfEnumMember(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                links.type = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
+            }
+            return links.type;
+        }
+        function getTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var targetSymbol = resolveAlias(symbol);
+                // It only makes sense to get the type of a value symbol. If the result of resolving
+                // the alias is not a value, then it has no type. To get the type associated with a
+                // type symbol, call getDeclaredTypeOfSymbol.
+                // This check is important because without it, a call to getTypeOfSymbol could end
+                // up recursively calling getTypeOfAlias, causing a stack overflow.
+                links.type = targetSymbol.flags & 107455 /* Value */
+                    ? getTypeOfSymbol(targetSymbol)
+                    : unknownType;
+            }
+            return links.type;
+        }
+        function getTypeOfInstantiatedSymbol(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                links.type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
+            }
+            return links.type;
+        }
+        function getTypeOfSymbol(symbol) {
+            if (symbol.flags & 16777216 /* Instantiated */) {
+                return getTypeOfInstantiatedSymbol(symbol);
+            }
+            if (symbol.flags & (3 /* Variable */ | 4 /* Property */)) {
+                return getTypeOfVariableOrParameterOrProperty(symbol);
+            }
+            if (symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
+                return getTypeOfFuncClassEnumModule(symbol);
+            }
+            if (symbol.flags & 8 /* EnumMember */) {
+                return getTypeOfEnumMember(symbol);
+            }
+            if (symbol.flags & 98304 /* Accessor */) {
+                return getTypeOfAccessors(symbol);
+            }
+            if (symbol.flags & 8388608 /* Alias */) {
+                return getTypeOfAlias(symbol);
+            }
+            return unknownType;
+        }
+        function getTargetType(type) {
+            return type.flags & 4096 /* Reference */ ? type.target : type;
+        }
+        function hasBaseType(type, checkBase) {
+            return check(type);
+            function check(type) {
+                var target = getTargetType(type);
+                return target === checkBase || ts.forEach(getBaseTypes(target), check);
+            }
+        }
+        // Appends the type parameters given by a list of declarations to a set of type parameters and returns the resulting set.
+        // The function allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set
+        // in-place and returns the same array.
+        function appendTypeParameters(typeParameters, declarations) {
+            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
+                var declaration = declarations_2[_i];
+                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
+                if (!typeParameters) {
+                    typeParameters = [tp];
+                }
+                else if (!ts.contains(typeParameters, tp)) {
+                    typeParameters.push(tp);
+                }
+            }
+            return typeParameters;
+        }
+        // Appends the outer type parameters of a node to a set of type parameters and returns the resulting set. The function
+        // allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set in-place and
+        // returns the same array.
+        function appendOuterTypeParameters(typeParameters, node) {
+            while (true) {
+                node = node.parent;
+                if (!node) {
+                    return typeParameters;
+                }
+                if (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */ ||
+                    node.kind === 220 /* FunctionDeclaration */ || node.kind === 179 /* FunctionExpression */ ||
+                    node.kind === 147 /* MethodDeclaration */ || node.kind === 180 /* ArrowFunction */) {
+                    var declarations = node.typeParameters;
+                    if (declarations) {
+                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
+                    }
+                }
+            }
+        }
+        // The outer type parameters are those defined by enclosing generic classes, methods, or functions.
+        function getOuterTypeParametersOfClassOrInterface(symbol) {
+            var declaration = symbol.flags & 32 /* Class */ ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */);
+            return appendOuterTypeParameters(undefined, declaration);
+        }
+        // The local type parameters are the combined set of type parameters from all declarations of the class,
+        // interface, or type alias.
+        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
+            var result;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var node = _a[_i];
+                if (node.kind === 222 /* InterfaceDeclaration */ || node.kind === 221 /* ClassDeclaration */ ||
+                    node.kind === 192 /* ClassExpression */ || node.kind === 223 /* TypeAliasDeclaration */) {
+                    var declaration = node;
+                    if (declaration.typeParameters) {
+                        result = appendTypeParameters(result, declaration.typeParameters);
+                    }
+                }
+            }
+            return result;
+        }
+        // The full set of type parameters for a generic class or interface type consists of its outer type parameters plus
+        // its locally declared type parameters.
+        function getTypeParametersOfClassOrInterface(symbol) {
+            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
+        }
+        function isConstructorType(type) {
+            return type.flags & 80896 /* ObjectType */ && getSignaturesOfType(type, 1 /* Construct */).length > 0;
+        }
+        function getBaseTypeNodeOfClass(type) {
+            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
+        }
+        function getConstructorsForTypeArguments(type, typeArgumentNodes) {
+            var typeArgCount = typeArgumentNodes ? typeArgumentNodes.length : 0;
+            return ts.filter(getSignaturesOfType(type, 1 /* Construct */), function (sig) { return (sig.typeParameters ? sig.typeParameters.length : 0) === typeArgCount; });
+        }
+        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes) {
+            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes);
+            if (typeArgumentNodes) {
+                var typeArguments_1 = ts.map(typeArgumentNodes, getTypeFromTypeNode);
+                signatures = ts.map(signatures, function (sig) { return getSignatureInstantiation(sig, typeArguments_1); });
+            }
+            return signatures;
+        }
+        // The base constructor of a class can resolve to
+        // undefinedType if the class has no extends clause,
+        // unknownType if an error occurred during resolution of the extends expression,
+        // nullType if the extends expression is the null value, or
+        // an object type with at least one construct signature.
+        function getBaseConstructorTypeOfClass(type) {
+            if (!type.resolvedBaseConstructorType) {
+                var baseTypeNode = getBaseTypeNodeOfClass(type);
+                if (!baseTypeNode) {
+                    return type.resolvedBaseConstructorType = undefinedType;
+                }
+                if (!pushTypeResolution(type, 1 /* ResolvedBaseConstructorType */)) {
+                    return unknownType;
+                }
+                var baseConstructorType = checkExpression(baseTypeNode.expression);
+                if (baseConstructorType.flags & 80896 /* ObjectType */) {
+                    // Resolving the members of a class requires us to resolve the base class of that class.
+                    // We force resolution here such that we catch circularities now.
+                    resolveStructuredTypeMembers(baseConstructorType);
+                }
+                if (!popTypeResolution()) {
+                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                if (baseConstructorType !== unknownType && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
+                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                type.resolvedBaseConstructorType = baseConstructorType;
+            }
+            return type.resolvedBaseConstructorType;
+        }
+        function getBaseTypes(type) {
+            var isClass = type.symbol.flags & 32 /* Class */;
+            var isInterface = type.symbol.flags & 64 /* Interface */;
+            if (!type.resolvedBaseTypes) {
+                if (!isClass && !isInterface) {
+                    ts.Debug.fail("type must be class or interface");
+                }
+                if (isClass) {
+                    resolveBaseTypesOfClass(type);
+                }
+                if (isInterface) {
+                    resolveBaseTypesOfInterface(type);
+                }
+            }
+            return type.resolvedBaseTypes;
+        }
+        function resolveBaseTypesOfClass(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            var baseConstructorType = getBaseConstructorTypeOfClass(type);
+            if (!(baseConstructorType.flags & 80896 /* ObjectType */)) {
+                return;
+            }
+            var baseTypeNode = getBaseTypeNodeOfClass(type);
+            var baseType;
+            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
+            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 /* Class */ &&
+                areAllOuterTypeParametersApplied(originalBaseType)) {
+                // When base constructor type is a class with no captured type arguments we know that the constructors all have the same type parameters as the
+                // class and all return the instance type of the class. There is no need for further checks and we can apply the
+                // type arguments in the same manner as a type reference to get the same error reporting experience.
+                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol);
+            }
+            else {
+                // The class derives from a "class-like" constructor function, check that we have at least one construct signature
+                // with a matching number of type parameters and use the return type of the first instantiated signature. Elsewhere
+                // we check that all instantiated signatures return the same type.
+                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments);
+                if (!constructors.length) {
+                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
+                    return;
+                }
+                baseType = getReturnTypeOfSignature(constructors[0]);
+            }
+            if (baseType === unknownType) {
+                return;
+            }
+            if (!(getTargetType(baseType).flags & (1024 /* Class */ | 2048 /* Interface */))) {
+                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
+                return;
+            }
+            if (type === baseType || hasBaseType(baseType, type)) {
+                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
+                return;
+            }
+            if (type.resolvedBaseTypes === emptyArray) {
+                type.resolvedBaseTypes = [baseType];
+            }
+            else {
+                type.resolvedBaseTypes.push(baseType);
+            }
+        }
+        function areAllOuterTypeParametersApplied(type) {
+            // An unapplied type parameter has its symbol still the same as the matching argument symbol.
+            // Since parameters are applied outer-to-inner, only the last outer parameter needs to be checked.
+            var outerTypeParameters = type.outerTypeParameters;
+            if (outerTypeParameters) {
+                var last = outerTypeParameters.length - 1;
+                var typeArguments = type.typeArguments;
+                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
+            }
+            return true;
+        }
+        function resolveBaseTypesOfInterface(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 222 /* InterfaceDeclaration */ && ts.getInterfaceBaseTypeNodes(declaration)) {
+                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
+                        var node = _c[_b];
+                        var baseType = getTypeFromTypeNode(node);
+                        if (baseType !== unknownType) {
+                            if (getTargetType(baseType).flags & (1024 /* Class */ | 2048 /* Interface */)) {
+                                if (type !== baseType && !hasBaseType(baseType, type)) {
+                                    if (type.resolvedBaseTypes === emptyArray) {
+                                        type.resolvedBaseTypes = [baseType];
+                                    }
+                                    else {
+                                        type.resolvedBaseTypes.push(baseType);
+                                    }
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
+                                }
+                            }
+                            else {
+                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        // Returns true if the interface given by the symbol is free of "this" references. Specifically, the result is
+        // true if the interface itself contains no references to "this" in its body, if all base types are interfaces,
+        // and if none of the base interfaces have a "this" type.
+        function isIndependentInterface(symbol) {
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 222 /* InterfaceDeclaration */) {
+                    if (declaration.flags & 16384 /* ContainsThis */) {
+                        return false;
+                    }
+                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
+                    if (baseTypeNodes) {
+                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
+                            var node = baseTypeNodes_1[_b];
+                            if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                                var baseSymbol = resolveEntityName(node.expression, 793056 /* Type */, /*ignoreErrors*/ true);
+                                if (!baseSymbol || !(baseSymbol.flags & 64 /* Interface */) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
+                                    return false;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            return true;
+        }
+        function getDeclaredTypeOfClassOrInterface(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var kind = symbol.flags & 32 /* Class */ ? 1024 /* Class */ : 2048 /* Interface */;
+                var type = links.declaredType = createObjectType(kind, symbol);
+                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
+                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                // A class or interface is generic if it has type parameters or a "this" type. We always give classes a "this" type
+                // because it is not feasible to analyze all members to determine if the "this" type escapes the class (in particular,
+                // property types inferred from initializers and method return types inferred from return statements are very hard
+                // to exhaustively analyze). We give interfaces a "this" type if we can't definitely determine that they are free of
+                // "this" references.
+                if (outerTypeParameters || localTypeParameters || kind === 1024 /* Class */ || !isIndependentInterface(symbol)) {
+                    type.flags |= 4096 /* Reference */;
+                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
+                    type.outerTypeParameters = outerTypeParameters;
+                    type.localTypeParameters = localTypeParameters;
+                    type.instantiations = {};
+                    type.instantiations[getTypeListId(type.typeParameters)] = type;
+                    type.target = type;
+                    type.typeArguments = type.typeParameters;
+                    type.thisType = createType(512 /* TypeParameter */ | 33554432 /* ThisType */);
+                    type.thisType.symbol = symbol;
+                    type.thisType.constraint = type;
+                }
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfTypeAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                // Note that we use the links object as the target here because the symbol object is used as the unique
+                // identity for resolution of the 'type' property in SymbolLinks.
+                if (!pushTypeResolution(symbol, 2 /* DeclaredType */)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                var declaration = ts.getDeclarationOfKind(symbol, 279 /* JSDocTypedefTag */);
+                if (declaration) {
+                    if (declaration.jsDocTypeLiteral) {
+                        type = getTypeFromTypeNode(declaration.jsDocTypeLiteral);
+                    }
+                    else {
+                        type = getTypeFromTypeNode(declaration.typeExpression.type);
+                    }
+                }
+                else {
+                    declaration = ts.getDeclarationOfKind(symbol, 223 /* TypeAliasDeclaration */);
+                    type = getTypeFromTypeNode(declaration.type);
+                }
+                if (popTypeResolution()) {
+                    links.typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                    if (links.typeParameters) {
+                        // Initialize the instantiation cache for generic type aliases. The declared type corresponds to
+                        // an instantiation of the type alias with the type parameters supplied as type arguments.
+                        links.instantiations = {};
+                        links.instantiations[getTypeListId(links.typeParameters)] = type;
+                    }
+                }
+                else {
+                    type = unknownType;
+                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
+                }
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfEnum(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var type = createType(128 /* Enum */);
+                type.symbol = symbol;
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfTypeParameter(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var type = createType(512 /* TypeParameter */);
+                type.symbol = symbol;
+                if (!ts.getDeclarationOfKind(symbol, 141 /* TypeParameter */).constraint) {
+                    type.constraint = noConstraintType;
+                }
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfSymbol(symbol) {
+            ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0);
+            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                return getDeclaredTypeOfClassOrInterface(symbol);
+            }
+            if (symbol.flags & 524288 /* TypeAlias */) {
+                return getDeclaredTypeOfTypeAlias(symbol);
+            }
+            if (symbol.flags & 384 /* Enum */) {
+                return getDeclaredTypeOfEnum(symbol);
+            }
+            if (symbol.flags & 262144 /* TypeParameter */) {
+                return getDeclaredTypeOfTypeParameter(symbol);
+            }
+            if (symbol.flags & 8388608 /* Alias */) {
+                return getDeclaredTypeOfAlias(symbol);
+            }
+            return unknownType;
+        }
+        // A type reference is considered independent if each type argument is considered independent.
+        function isIndependentTypeReference(node) {
+            if (node.typeArguments) {
+                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
+                    var typeNode = _a[_i];
+                    if (!isIndependentType(typeNode)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        // A type is considered independent if it the any, string, number, boolean, symbol, or void keyword, a string
+        // literal type, an array with an element type that is considered independent, or a type reference that is
+        // considered independent.
+        function isIndependentType(node) {
+            switch (node.kind) {
+                case 117 /* AnyKeyword */:
+                case 132 /* StringKeyword */:
+                case 130 /* NumberKeyword */:
+                case 120 /* BooleanKeyword */:
+                case 133 /* SymbolKeyword */:
+                case 103 /* VoidKeyword */:
+                case 135 /* UndefinedKeyword */:
+                case 93 /* NullKeyword */:
+                case 127 /* NeverKeyword */:
+                case 166 /* StringLiteralType */:
+                    return true;
+                case 160 /* ArrayType */:
+                    return isIndependentType(node.elementType);
+                case 155 /* TypeReference */:
+                    return isIndependentTypeReference(node);
+            }
+            return false;
+        }
+        // A variable-like declaration is considered independent (free of this references) if it has a type annotation
+        // that specifies an independent type, or if it has no type annotation and no initializer (and thus of type any).
+        function isIndependentVariableLikeDeclaration(node) {
+            return node.type && isIndependentType(node.type) || !node.type && !node.initializer;
+        }
+        // A function-like declaration is considered independent (free of this references) if it has a return type
+        // annotation that is considered independent and if each parameter is considered independent.
+        function isIndependentFunctionLikeDeclaration(node) {
+            if (node.kind !== 148 /* Constructor */ && (!node.type || !isIndependentType(node.type))) {
+                return false;
+            }
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                if (!isIndependentVariableLikeDeclaration(parameter)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        // Returns true if the class or interface member given by the symbol is free of "this" references. The
+        // function may return false for symbols that are actually free of "this" references because it is not
+        // feasible to perform a complete analysis in all cases. In particular, property members with types
+        // inferred from their initializers and function members with inferred return types are conservatively
+        // assumed not to be free of "this" references.
+        function isIndependentMember(symbol) {
+            if (symbol.declarations && symbol.declarations.length === 1) {
+                var declaration = symbol.declarations[0];
+                if (declaration) {
+                    switch (declaration.kind) {
+                        case 145 /* PropertyDeclaration */:
+                        case 144 /* PropertySignature */:
+                            return isIndependentVariableLikeDeclaration(declaration);
+                        case 147 /* MethodDeclaration */:
+                        case 146 /* MethodSignature */:
+                        case 148 /* Constructor */:
+                            return isIndependentFunctionLikeDeclaration(declaration);
+                    }
+                }
+            }
+            return false;
+        }
+        function createSymbolTable(symbols) {
+            var result = {};
+            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
+                var symbol = symbols_1[_i];
+                result[symbol.name] = symbol;
+            }
+            return result;
+        }
+        // The mappingThisOnly flag indicates that the only type parameter being mapped is "this". When the flag is true,
+        // we check symbols to see if we can quickly conclude they are free of "this" references, thus needing no instantiation.
+        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
+            var result = {};
+            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
+                var symbol = symbols_2[_i];
+                result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper);
+            }
+            return result;
+        }
+        function addInheritedMembers(symbols, baseSymbols) {
+            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
+                var s = baseSymbols_1[_i];
+                if (!ts.hasProperty(symbols, s.name)) {
+                    symbols[s.name] = s;
+                }
+            }
+        }
+        function resolveDeclaredMembers(type) {
+            if (!type.declaredProperties) {
+                var symbol = type.symbol;
+                type.declaredProperties = getNamedMembers(symbol.members);
+                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members["__call"]);
+                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members["__new"]);
+                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
+                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+            }
+            return type;
+        }
+        function getTypeWithThisArgument(type, thisArgument) {
+            if (type.flags & 4096 /* Reference */) {
+                return createTypeReference(type.target, ts.concatenate(type.typeArguments, [thisArgument || type.target.thisType]));
+            }
+            return type;
+        }
+        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
+            var mapper = identityMapper;
+            var members = source.symbol.members;
+            var callSignatures = source.declaredCallSignatures;
+            var constructSignatures = source.declaredConstructSignatures;
+            var stringIndexInfo = source.declaredStringIndexInfo;
+            var numberIndexInfo = source.declaredNumberIndexInfo;
+            if (!ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
+                mapper = createTypeMapper(typeParameters, typeArguments);
+                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, /*mappingThisOnly*/ typeParameters.length === 1);
+                callSignatures = instantiateList(source.declaredCallSignatures, mapper, instantiateSignature);
+                constructSignatures = instantiateList(source.declaredConstructSignatures, mapper, instantiateSignature);
+                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
+                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
+            }
+            var baseTypes = getBaseTypes(source);
+            if (baseTypes.length) {
+                if (members === source.symbol.members) {
+                    members = createSymbolTable(source.declaredProperties);
+                }
+                var thisArgument = ts.lastOrUndefined(typeArguments);
+                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
+                    var baseType = baseTypes_1[_i];
+                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
+                    addInheritedMembers(members, getPropertiesOfObjectType(instantiatedBaseType));
+                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0 /* Call */));
+                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1 /* Construct */));
+                    stringIndexInfo = stringIndexInfo || getIndexInfoOfType(instantiatedBaseType, 0 /* String */);
+                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1 /* Number */);
+                }
+            }
+            setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function resolveClassOrInterfaceMembers(type) {
+            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
+        }
+        function resolveTypeReferenceMembers(type) {
+            var source = resolveDeclaredMembers(type.target);
+            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
+            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
+                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
+            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
+        }
+        function createSignature(declaration, typeParameters, thisType, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasStringLiterals) {
+            var sig = new Signature(checker);
+            sig.declaration = declaration;
+            sig.typeParameters = typeParameters;
+            sig.parameters = parameters;
+            sig.thisType = thisType;
+            sig.resolvedReturnType = resolvedReturnType;
+            sig.typePredicate = typePredicate;
+            sig.minArgumentCount = minArgumentCount;
+            sig.hasRestParameter = hasRestParameter;
+            sig.hasStringLiterals = hasStringLiterals;
+            return sig;
+        }
+        function cloneSignature(sig) {
+            return createSignature(sig.declaration, sig.typeParameters, sig.thisType, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasStringLiterals);
+        }
+        function getDefaultConstructSignatures(classType) {
+            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+            var baseSignatures = getSignaturesOfType(baseConstructorType, 1 /* Construct */);
+            if (baseSignatures.length === 0) {
+                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasStringLiterals*/ false)];
+            }
+            var baseTypeNode = getBaseTypeNodeOfClass(classType);
+            var typeArguments = ts.map(baseTypeNode.typeArguments, getTypeFromTypeNode);
+            var typeArgCount = typeArguments ? typeArguments.length : 0;
+            var result = [];
+            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
+                var baseSig = baseSignatures_1[_i];
+                var typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
+                if (typeParamCount === typeArgCount) {
+                    var sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
+                    sig.typeParameters = classType.localTypeParameters;
+                    sig.resolvedReturnType = classType;
+                    result.push(sig);
+                }
+            }
+            return result;
+        }
+        function createTupleTypeMemberSymbols(memberTypes) {
+            var members = {};
+            for (var i = 0; i < memberTypes.length; i++) {
+                var symbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "" + i);
+                symbol.type = memberTypes[i];
+                members[i] = symbol;
+            }
+            return members;
+        }
+        function resolveTupleTypeMembers(type) {
+            var arrayElementType = getUnionType(type.elementTypes, /*noSubtypeReduction*/ true);
+            // Make the tuple type itself the 'this' type by including an extra type argument
+            var arrayType = resolveStructuredTypeMembers(createTypeFromGenericGlobalType(globalArrayType, [arrayElementType, type]));
+            var members = createTupleTypeMemberSymbols(type.elementTypes);
+            addInheritedMembers(members, arrayType.properties);
+            setObjectTypeMembers(type, members, arrayType.callSignatures, arrayType.constructSignatures, arrayType.stringIndexInfo, arrayType.numberIndexInfo);
+        }
+        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
+            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
+                var s = signatureList_1[_i];
+                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
+                    return s;
+                }
+            }
+        }
+        function findMatchingSignatures(signatureLists, signature, listIndex) {
+            if (signature.typeParameters) {
+                // We require an exact match for generic signatures, so we only return signatures from the first
+                // signature list and only if they have exact matches in the other signature lists.
+                if (listIndex > 0) {
+                    return undefined;
+                }
+                for (var i = 1; i < signatureLists.length; i++) {
+                    if (!findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false)) {
+                        return undefined;
+                    }
+                }
+                return [signature];
+            }
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                // Allow matching non-generic signatures to have excess parameters and different return types
+                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ true, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true);
+                if (!match) {
+                    return undefined;
+                }
+                if (!ts.contains(result, match)) {
+                    (result || (result = [])).push(match);
+                }
+            }
+            return result;
+        }
+        // The signatures of a union type are those signatures that are present in each of the constituent types.
+        // Generic signatures must match exactly, but non-generic signatures are allowed to have extra optional
+        // parameters and may differ in return types. When signatures differ in return types, the resulting return
+        // type is the union of the constituent return types.
+        function getUnionSignatures(types, kind) {
+            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
+                    var signature = _a[_i];
+                    // Only process signatures with parameter lists that aren't already in the result list
+                    if (!result || !findMatchingSignature(result, signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true)) {
+                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
+                        if (unionSignatures) {
+                            var s = signature;
+                            // Union the result types when more than one signature matches
+                            if (unionSignatures.length > 1) {
+                                s = cloneSignature(signature);
+                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisType; })) {
+                                    s.thisType = getUnionType(ts.map(unionSignatures, function (sig) { return sig.thisType || anyType; }));
+                                }
+                                // Clear resolved return type we possibly got from cloneSignature
+                                s.resolvedReturnType = undefined;
+                                s.unionSignatures = unionSignatures;
+                            }
+                            (result || (result = [])).push(s);
+                        }
+                    }
+                }
+            }
+            return result || emptyArray;
+        }
+        function getUnionIndexInfo(types, kind) {
+            var indexTypes = [];
+            var isAnyReadonly = false;
+            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
+                var type = types_1[_i];
+                var indexInfo = getIndexInfoOfType(type, kind);
+                if (!indexInfo) {
+                    return undefined;
+                }
+                indexTypes.push(indexInfo.type);
+                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
+            }
+            return createIndexInfo(getUnionType(indexTypes), isAnyReadonly);
+        }
+        function resolveUnionTypeMembers(type) {
+            // The members and properties collections are empty for union types. To get all properties of a union
+            // type use getPropertiesOfType (only the language service uses this).
+            var callSignatures = getUnionSignatures(type.types, 0 /* Call */);
+            var constructSignatures = getUnionSignatures(type.types, 1 /* Construct */);
+            var stringIndexInfo = getUnionIndexInfo(type.types, 0 /* String */);
+            var numberIndexInfo = getUnionIndexInfo(type.types, 1 /* Number */);
+            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function intersectTypes(type1, type2) {
+            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
+        }
+        function intersectIndexInfos(info1, info2) {
+            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
+        }
+        function resolveIntersectionTypeMembers(type) {
+            // The members and properties collections are empty for intersection types. To get all properties of an
+            // intersection type use getPropertiesOfType (only the language service uses this).
+            var callSignatures = emptyArray;
+            var constructSignatures = emptyArray;
+            var stringIndexInfo = undefined;
+            var numberIndexInfo = undefined;
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0 /* Call */));
+                constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(t, 1 /* Construct */));
+                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0 /* String */));
+                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1 /* Number */));
+            }
+            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function resolveAnonymousTypeMembers(type) {
+            var symbol = type.symbol;
+            if (type.target) {
+                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, /*mappingThisOnly*/ false);
+                var callSignatures = instantiateList(getSignaturesOfType(type.target, 0 /* Call */), type.mapper, instantiateSignature);
+                var constructSignatures = instantiateList(getSignaturesOfType(type.target, 1 /* Construct */), type.mapper, instantiateSignature);
+                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0 /* String */), type.mapper);
+                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1 /* Number */), type.mapper);
+                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else if (symbol.flags & 2048 /* TypeLiteral */) {
+                var members = symbol.members;
+                var callSignatures = getSignaturesOfSymbol(members["__call"]);
+                var constructSignatures = getSignaturesOfSymbol(members["__new"]);
+                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
+                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else {
+                // Combinations of function, class, enum and module
+                var members = emptySymbols;
+                var constructSignatures = emptyArray;
+                if (symbol.flags & 1952 /* HasExports */) {
+                    members = getExportsOfSymbol(symbol);
+                }
+                if (symbol.flags & 32 /* Class */) {
+                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
+                    constructSignatures = getSignaturesOfSymbol(symbol.members["__constructor"]);
+                    if (!constructSignatures.length) {
+                        constructSignatures = getDefaultConstructSignatures(classType);
+                    }
+                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+                    if (baseConstructorType.flags & 80896 /* ObjectType */) {
+                        members = createSymbolTable(getNamedMembers(members));
+                        addInheritedMembers(members, getPropertiesOfObjectType(baseConstructorType));
+                    }
+                }
+                var numberIndexInfo = symbol.flags & 384 /* Enum */ ? enumNumberIndexInfo : undefined;
+                setObjectTypeMembers(type, members, emptyArray, constructSignatures, undefined, numberIndexInfo);
+                // We resolve the members before computing the signatures because a signature may use
+                // typeof with a qualified name expression that circularly references the type we are
+                // in the process of resolving (see issue #6072). The temporarily empty signature list
+                // will never be observed because a qualified name can't reference signatures.
+                if (symbol.flags & (16 /* Function */ | 8192 /* Method */)) {
+                    type.callSignatures = getSignaturesOfSymbol(symbol);
+                }
+            }
+        }
+        function resolveStructuredTypeMembers(type) {
+            if (!type.members) {
+                if (type.flags & 4096 /* Reference */) {
+                    resolveTypeReferenceMembers(type);
+                }
+                else if (type.flags & (1024 /* Class */ | 2048 /* Interface */)) {
+                    resolveClassOrInterfaceMembers(type);
+                }
+                else if (type.flags & 65536 /* Anonymous */) {
+                    resolveAnonymousTypeMembers(type);
+                }
+                else if (type.flags & 8192 /* Tuple */) {
+                    resolveTupleTypeMembers(type);
+                }
+                else if (type.flags & 16384 /* Union */) {
+                    resolveUnionTypeMembers(type);
+                }
+                else if (type.flags & 32768 /* Intersection */) {
+                    resolveIntersectionTypeMembers(type);
+                }
+            }
+            return type;
+        }
+        /** Return properties of an object type or an empty array for other types */
+        function getPropertiesOfObjectType(type) {
+            if (type.flags & 80896 /* ObjectType */) {
+                return resolveStructuredTypeMembers(type).properties;
+            }
+            return emptyArray;
+        }
+        /** If the given type is an object type and that type has a property by the given name,
+         * return the symbol for that property. Otherwise return undefined. */
+        function getPropertyOfObjectType(type, name) {
+            if (type.flags & 80896 /* ObjectType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (ts.hasProperty(resolved.members, name)) {
+                    var symbol = resolved.members[name];
+                    if (symbolIsValue(symbol)) {
+                        return symbol;
+                    }
+                }
+            }
+        }
+        function getPropertiesOfUnionOrIntersectionType(type) {
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var current = _a[_i];
+                for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
+                    var prop = _c[_b];
+                    getPropertyOfUnionOrIntersectionType(type, prop.name);
+                }
+                // The properties of a union type are those that are present in all constituent types, so
+                // we only need to check the properties of the first type
+                if (type.flags & 16384 /* Union */) {
+                    break;
+                }
+            }
+            return type.resolvedProperties ? symbolsToArray(type.resolvedProperties) : emptyArray;
+        }
+        function getPropertiesOfType(type) {
+            type = getApparentType(type);
+            return type.flags & 49152 /* UnionOrIntersection */ ? getPropertiesOfUnionOrIntersectionType(type) : getPropertiesOfObjectType(type);
+        }
+        /**
+         * The apparent type of a type parameter is the base constraint instantiated with the type parameter
+         * as the type argument for the 'this' type.
+         */
+        function getApparentTypeOfTypeParameter(type) {
+            if (!type.resolvedApparentType) {
+                var constraintType = getConstraintOfTypeParameter(type);
+                while (constraintType && constraintType.flags & 512 /* TypeParameter */) {
+                    constraintType = getConstraintOfTypeParameter(constraintType);
+                }
+                type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type);
+            }
+            return type.resolvedApparentType;
+        }
+        /**
+         * For a type parameter, return the base constraint of the type parameter. For the string, number,
+         * boolean, and symbol primitive types, return the corresponding object types. Otherwise return the
+         * type itself. Note that the apparent type of a union type is the union type itself.
+         */
+        function getApparentType(type) {
+            if (type.flags & 512 /* TypeParameter */) {
+                type = getApparentTypeOfTypeParameter(type);
+            }
+            if (type.flags & 258 /* StringLike */) {
+                type = globalStringType;
+            }
+            else if (type.flags & 132 /* NumberLike */) {
+                type = globalNumberType;
+            }
+            else if (type.flags & 8 /* Boolean */) {
+                type = globalBooleanType;
+            }
+            else if (type.flags & 16777216 /* ESSymbol */) {
+                type = getGlobalESSymbolType();
+            }
+            return type;
+        }
+        function createUnionOrIntersectionProperty(containingType, name) {
+            var types = containingType.types;
+            var props;
+            // Flags we want to propagate to the result if they exist in all source symbols
+            var commonFlags = (containingType.flags & 32768 /* Intersection */) ? 536870912 /* Optional */ : 0 /* None */;
+            for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
+                var current = types_2[_i];
+                var type = getApparentType(current);
+                if (type !== unknownType) {
+                    var prop = getPropertyOfType(type, name);
+                    if (prop && !(getDeclarationFlagsFromSymbol(prop) & (8 /* Private */ | 16 /* Protected */))) {
+                        commonFlags &= prop.flags;
+                        if (!props) {
+                            props = [prop];
+                        }
+                        else if (!ts.contains(props, prop)) {
+                            props.push(prop);
+                        }
+                    }
+                    else if (containingType.flags & 16384 /* Union */) {
+                        // A union type requires the property to be present in all constituent types
+                        return undefined;
+                    }
+                }
+            }
+            if (!props) {
+                return undefined;
+            }
+            if (props.length === 1) {
+                return props[0];
+            }
+            var propTypes = [];
+            var declarations = [];
+            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
+                var prop = props_1[_a];
+                if (prop.declarations) {
+                    ts.addRange(declarations, prop.declarations);
+                }
+                propTypes.push(getTypeOfSymbol(prop));
+            }
+            var result = createSymbol(4 /* Property */ |
+                67108864 /* Transient */ |
+                268435456 /* SyntheticProperty */ |
+                commonFlags, name);
+            result.containingType = containingType;
+            result.declarations = declarations;
+            result.type = containingType.flags & 16384 /* Union */ ? getUnionType(propTypes) : getIntersectionType(propTypes);
+            return result;
+        }
+        function getPropertyOfUnionOrIntersectionType(type, name) {
+            var properties = type.resolvedProperties || (type.resolvedProperties = {});
+            if (ts.hasProperty(properties, name)) {
+                return properties[name];
+            }
+            var property = createUnionOrIntersectionProperty(type, name);
+            if (property) {
+                properties[name] = property;
+            }
+            return property;
+        }
+        // Return the symbol for the property with the given name in the given type. Creates synthetic union properties when
+        // necessary, maps primitive types and type parameters are to their apparent types, and augments with properties from
+        // Object and Function as appropriate.
+        function getPropertyOfType(type, name) {
+            type = getApparentType(type);
+            if (type.flags & 80896 /* ObjectType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (ts.hasProperty(resolved.members, name)) {
+                    var symbol = resolved.members[name];
+                    if (symbolIsValue(symbol)) {
+                        return symbol;
+                    }
+                }
+                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
+                    var symbol = getPropertyOfObjectType(globalFunctionType, name);
+                    if (symbol) {
+                        return symbol;
+                    }
+                }
+                return getPropertyOfObjectType(globalObjectType, name);
+            }
+            if (type.flags & 49152 /* UnionOrIntersection */) {
+                return getPropertyOfUnionOrIntersectionType(type, name);
+            }
+            return undefined;
+        }
+        function getSignaturesOfStructuredType(type, kind) {
+            if (type.flags & 130048 /* StructuredType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 /* Call */ ? resolved.callSignatures : resolved.constructSignatures;
+            }
+            return emptyArray;
+        }
+        /**
+         * Return the signatures of the given kind in the given type. Creates synthetic union signatures when necessary and
+         * maps primitive types and type parameters are to their apparent types.
+         */
+        function getSignaturesOfType(type, kind) {
+            return getSignaturesOfStructuredType(getApparentType(type), kind);
+        }
+        function getIndexInfoOfStructuredType(type, kind) {
+            if (type.flags & 130048 /* StructuredType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 /* String */ ? resolved.stringIndexInfo : resolved.numberIndexInfo;
+            }
+        }
+        function getIndexTypeOfStructuredType(type, kind) {
+            var info = getIndexInfoOfStructuredType(type, kind);
+            return info && info.type;
+        }
+        // Return the indexing info of the given kind in the given type. Creates synthetic union index types when necessary and
+        // maps primitive types and type parameters are to their apparent types.
+        function getIndexInfoOfType(type, kind) {
+            return getIndexInfoOfStructuredType(getApparentType(type), kind);
+        }
+        // Return the index type of the given kind in the given type. Creates synthetic union index types when necessary and
+        // maps primitive types and type parameters are to their apparent types.
+        function getIndexTypeOfType(type, kind) {
+            return getIndexTypeOfStructuredType(getApparentType(type), kind);
+        }
+        function getImplicitIndexTypeOfType(type, kind) {
+            if (isObjectLiteralType(type)) {
+                var propTypes = [];
+                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
+                        propTypes.push(getTypeOfSymbol(prop));
+                    }
+                }
+                if (propTypes.length) {
+                    return getUnionType(propTypes);
+                }
+            }
+            return undefined;
+        }
+        function getTypeParametersFromJSDocTemplate(declaration) {
+            if (declaration.flags & 134217728 /* JavaScriptFile */) {
+                var templateTag = ts.getJSDocTemplateTag(declaration);
+                if (templateTag) {
+                    return getTypeParametersFromDeclaration(templateTag.typeParameters);
+                }
+            }
+            return undefined;
+        }
+        // Return list of type parameters with duplicates removed (duplicate identifier errors are generated in the actual
+        // type checking functions).
+        function getTypeParametersFromDeclaration(typeParameterDeclarations) {
+            var result = [];
+            ts.forEach(typeParameterDeclarations, function (node) {
+                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
+                if (!ts.contains(result, tp)) {
+                    result.push(tp);
+                }
+            });
+            return result;
+        }
+        function symbolsToArray(symbols) {
+            var result = [];
+            for (var id in symbols) {
+                if (!isReservedMemberName(id)) {
+                    result.push(symbols[id]);
+                }
+            }
+            return result;
+        }
+        function isOptionalParameter(node) {
+            if (node.flags & 134217728 /* JavaScriptFile */) {
+                if (node.type && node.type.kind === 268 /* JSDocOptionalType */) {
+                    return true;
+                }
+                var paramTag = ts.getCorrespondingJSDocParameterTag(node);
+                if (paramTag) {
+                    if (paramTag.isBracketed) {
+                        return true;
+                    }
+                    if (paramTag.typeExpression) {
+                        return paramTag.typeExpression.type.kind === 268 /* JSDocOptionalType */;
+                    }
+                }
+            }
+            if (ts.hasQuestionToken(node)) {
+                return true;
+            }
+            if (node.initializer) {
+                var signatureDeclaration = node.parent;
+                var signature = getSignatureFromDeclaration(signatureDeclaration);
+                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
+                ts.Debug.assert(parameterIndex >= 0);
+                return parameterIndex >= signature.minArgumentCount;
+            }
+            return false;
+        }
+        function createTypePredicateFromTypePredicateNode(node) {
+            if (node.parameterName.kind === 69 /* Identifier */) {
+                var parameterName = node.parameterName;
+                return {
+                    kind: 1 /* Identifier */,
+                    parameterName: parameterName ? parameterName.text : undefined,
+                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
+                    type: getTypeFromTypeNode(node.type)
+                };
+            }
+            else {
+                return {
+                    kind: 0 /* This */,
+                    type: getTypeFromTypeNode(node.type)
+                };
+            }
+        }
+        function getSignatureFromDeclaration(declaration) {
+            var links = getNodeLinks(declaration);
+            if (!links.resolvedSignature) {
+                var parameters = [];
+                var hasStringLiterals = false;
+                var minArgumentCount = -1;
+                var thisType = undefined;
+                var hasThisParameter = void 0;
+                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
+                // If this is a JSDoc construct signature, then skip the first parameter in the
+                // parameter list.  The first parameter represents the return type of the construct
+                // signature.
+                for (var i = isJSConstructSignature ? 1 : 0, n = declaration.parameters.length; i < n; i++) {
+                    var param = declaration.parameters[i];
+                    var paramSymbol = param.symbol;
+                    // Include parameter symbol instead of property symbol in the signature
+                    if (paramSymbol && !!(paramSymbol.flags & 4 /* Property */) && !ts.isBindingPattern(param.name)) {
+                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455 /* Value */, undefined, undefined);
+                        paramSymbol = resolvedSymbol;
+                    }
+                    if (i === 0 && paramSymbol.name === "this") {
+                        hasThisParameter = true;
+                        thisType = param.type ? getTypeFromTypeNode(param.type) : unknownType;
+                    }
+                    else {
+                        parameters.push(paramSymbol);
+                    }
+                    if (param.type && param.type.kind === 166 /* StringLiteralType */) {
+                        hasStringLiterals = true;
+                    }
+                    if (param.initializer || param.questionToken || param.dotDotDotToken) {
+                        if (minArgumentCount < 0) {
+                            minArgumentCount = i - (hasThisParameter ? 1 : 0);
+                        }
+                    }
+                    else {
+                        // If we see any required parameters, it means the prior ones were not in fact optional.
+                        minArgumentCount = -1;
+                    }
+                }
+                // If only one accessor includes a this-type annotation, the other behaves as if it had the same type annotation
+                if ((declaration.kind === 149 /* GetAccessor */ || declaration.kind === 150 /* SetAccessor */) &&
+                    !ts.hasDynamicName(declaration) &&
+                    (!hasThisParameter || thisType === unknownType)) {
+                    var otherKind = declaration.kind === 149 /* GetAccessor */ ? 150 /* SetAccessor */ : 149 /* GetAccessor */;
+                    var setter = ts.getDeclarationOfKind(declaration.symbol, otherKind);
+                    thisType = getAnnotatedAccessorThisType(setter);
+                }
+                if (minArgumentCount < 0) {
+                    minArgumentCount = declaration.parameters.length - (hasThisParameter ? 1 : 0);
+                }
+                if (isJSConstructSignature) {
+                    minArgumentCount--;
+                }
+                var classType = declaration.kind === 148 /* Constructor */ ?
+                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
+                    : undefined;
+                var typeParameters = classType ? classType.localTypeParameters :
+                    declaration.typeParameters ? getTypeParametersFromDeclaration(declaration.typeParameters) :
+                        getTypeParametersFromJSDocTemplate(declaration);
+                var returnType = getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType);
+                var typePredicate = declaration.type && declaration.type.kind === 154 /* TypePredicate */ ?
+                    createTypePredicateFromTypePredicateNode(declaration.type) :
+                    undefined;
+                links.resolvedSignature = createSignature(declaration, typeParameters, thisType, parameters, returnType, typePredicate, minArgumentCount, ts.hasRestParameter(declaration), hasStringLiterals);
+            }
+            return links.resolvedSignature;
+        }
+        function getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType) {
+            if (isJSConstructSignature) {
+                return getTypeFromTypeNode(declaration.parameters[0].type);
+            }
+            else if (classType) {
+                return classType;
+            }
+            else if (declaration.type) {
+                return getTypeFromTypeNode(declaration.type);
+            }
+            if (declaration.flags & 134217728 /* JavaScriptFile */) {
+                var type = getReturnTypeFromJSDocComment(declaration);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            // TypeScript 1.0 spec (April 2014):
+            // If only one accessor includes a type annotation, the other behaves as if it had the same type annotation.
+            if (declaration.kind === 149 /* GetAccessor */ && !ts.hasDynamicName(declaration)) {
+                var setter = ts.getDeclarationOfKind(declaration.symbol, 150 /* SetAccessor */);
+                return getAnnotatedAccessorType(setter);
+            }
+            if (ts.nodeIsMissing(declaration.body)) {
+                return anyType;
+            }
+        }
+        function getSignaturesOfSymbol(symbol) {
+            if (!symbol)
+                return emptyArray;
+            var result = [];
+            for (var i = 0, len = symbol.declarations.length; i < len; i++) {
+                var node = symbol.declarations[i];
+                switch (node.kind) {
+                    case 156 /* FunctionType */:
+                    case 157 /* ConstructorType */:
+                    case 220 /* FunctionDeclaration */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 148 /* Constructor */:
+                    case 151 /* CallSignature */:
+                    case 152 /* ConstructSignature */:
+                    case 153 /* IndexSignature */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 269 /* JSDocFunctionType */:
+                        // Don't include signature if node is the implementation of an overloaded function. A node is considered
+                        // an implementation node if it has a body and the previous node is of the same kind and immediately
+                        // precedes the implementation node (i.e. has the same parent and ends where the implementation starts).
+                        if (i > 0 && node.body) {
+                            var previous = symbol.declarations[i - 1];
+                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
+                                break;
+                            }
+                        }
+                        result.push(getSignatureFromDeclaration(node));
+                }
+            }
+            return result;
+        }
+        function resolveExternalModuleTypeByLiteral(name) {
+            var moduleSym = resolveExternalModuleName(name, name);
+            if (moduleSym) {
+                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
+                if (resolvedModuleSymbol) {
+                    return getTypeOfSymbol(resolvedModuleSymbol);
+                }
+            }
+            return anyType;
+        }
+        function getReturnTypeOfSignature(signature) {
+            if (!signature.resolvedReturnType) {
+                if (!pushTypeResolution(signature, 3 /* ResolvedReturnType */)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                if (signature.target) {
+                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
+                }
+                else if (signature.unionSignatures) {
+                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature));
+                }
+                else {
+                    type = getReturnTypeFromBody(signature.declaration);
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (compilerOptions.noImplicitAny) {
+                        var declaration = signature.declaration;
+                        if (declaration.name) {
+                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
+                        }
+                    }
+                }
+                signature.resolvedReturnType = type;
+            }
+            return signature.resolvedReturnType;
+        }
+        function getRestTypeOfSignature(signature) {
+            if (signature.hasRestParameter) {
+                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
+                if (type.flags & 4096 /* Reference */ && type.target === globalArrayType) {
+                    return type.typeArguments[0];
+                }
+            }
+            return anyType;
+        }
+        function getSignatureInstantiation(signature, typeArguments) {
+            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), /*eraseTypeParameters*/ true);
+        }
+        function getErasedSignature(signature) {
+            if (!signature.typeParameters)
+                return signature;
+            if (!signature.erasedSignatureCache) {
+                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), /*eraseTypeParameters*/ true);
+            }
+            return signature.erasedSignatureCache;
+        }
+        function getOrCreateTypeFromSignature(signature) {
+            // There are two ways to declare a construct signature, one is by declaring a class constructor
+            // using the constructor keyword, and the other is declaring a bare construct signature in an
+            // object type literal or interface (using the new keyword). Each way of declaring a constructor
+            // will result in a different declaration kind.
+            if (!signature.isolatedSignatureType) {
+                var isConstructor = signature.declaration.kind === 148 /* Constructor */ || signature.declaration.kind === 152 /* ConstructSignature */;
+                var type = createObjectType(65536 /* Anonymous */ | 262144 /* FromSignature */);
+                type.members = emptySymbols;
+                type.properties = emptyArray;
+                type.callSignatures = !isConstructor ? [signature] : emptyArray;
+                type.constructSignatures = isConstructor ? [signature] : emptyArray;
+                signature.isolatedSignatureType = type;
+            }
+            return signature.isolatedSignatureType;
+        }
+        function getIndexSymbol(symbol) {
+            return symbol.members["__index"];
+        }
+        function getIndexDeclarationOfSymbol(symbol, kind) {
+            var syntaxKind = kind === 1 /* Number */ ? 130 /* NumberKeyword */ : 132 /* StringKeyword */;
+            var indexSymbol = getIndexSymbol(symbol);
+            if (indexSymbol) {
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var node = decl;
+                    if (node.parameters.length === 1) {
+                        var parameter = node.parameters[0];
+                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
+                            return node;
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function createIndexInfo(type, isReadonly, declaration) {
+            return { type: type, isReadonly: isReadonly, declaration: declaration };
+        }
+        function getIndexInfoOfSymbol(symbol, kind) {
+            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
+            if (declaration) {
+                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (declaration.flags & 64 /* Readonly */) !== 0, declaration);
+            }
+            return undefined;
+        }
+        function getConstraintDeclaration(type) {
+            return ts.getDeclarationOfKind(type.symbol, 141 /* TypeParameter */).constraint;
+        }
+        function hasConstraintReferenceTo(type, target) {
+            var checked;
+            while (type && !(type.flags & 33554432 /* ThisType */) && type.flags & 512 /* TypeParameter */ && !ts.contains(checked, type)) {
+                if (type === target) {
+                    return true;
+                }
+                (checked || (checked = [])).push(type);
+                var constraintDeclaration = getConstraintDeclaration(type);
+                type = constraintDeclaration && getTypeFromTypeNode(constraintDeclaration);
+            }
+            return false;
+        }
+        function getConstraintOfTypeParameter(typeParameter) {
+            if (!typeParameter.constraint) {
+                if (typeParameter.target) {
+                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
+                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
+                }
+                else {
+                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
+                    var constraint = getTypeFromTypeNode(constraintDeclaration);
+                    if (hasConstraintReferenceTo(constraint, typeParameter)) {
+                        error(constraintDeclaration, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
+                        constraint = unknownType;
+                    }
+                    typeParameter.constraint = constraint;
+                }
+            }
+            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
+        }
+        function getParentSymbolOfTypeParameter(typeParameter) {
+            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 141 /* TypeParameter */).parent);
+        }
+        function getTypeListId(types) {
+            if (types) {
+                switch (types.length) {
+                    case 1:
+                        return "" + types[0].id;
+                    case 2:
+                        return types[0].id + "," + types[1].id;
+                    default:
+                        var result = "";
+                        for (var i = 0; i < types.length; i++) {
+                            if (i > 0) {
+                                result += ",";
+                            }
+                            result += types[i].id;
+                        }
+                        return result;
+                }
+            }
+            return "";
+        }
+        // This function is used to propagate certain flags when creating new object type references and union types.
+        // It is only necessary to do so if a constituent type might be the undefined type, the null type, the type
+        // of an object literal or the anyFunctionType. This is because there are operations in the type checker
+        // that care about the presence of such types at arbitrary depth in a containing type.
+        function getPropagatingFlagsOfTypes(types, excludeKinds) {
+            var result = 0;
+            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
+                var type = types_3[_i];
+                if (!(type.flags & excludeKinds)) {
+                    result |= type.flags;
+                }
+            }
+            return result & 14680064 /* PropagatingFlags */;
+        }
+        function createTypeReference(target, typeArguments) {
+            var id = getTypeListId(typeArguments);
+            var type = target.instantiations[id];
+            if (!type) {
+                var propagatedFlags = typeArguments ? getPropagatingFlagsOfTypes(typeArguments, /*excludeKinds*/ 0) : 0;
+                var flags = 4096 /* Reference */ | propagatedFlags;
+                type = target.instantiations[id] = createObjectType(flags, target.symbol);
+                type.target = target;
+                type.typeArguments = typeArguments;
+            }
+            return type;
+        }
+        // Get type from reference to class or interface
+        function getTypeFromClassOrInterfaceReference(node, symbol) {
+            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
+            var typeParameters = type.localTypeParameters;
+            if (typeParameters) {
+                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
+                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */), typeParameters.length);
+                    return unknownType;
+                }
+                // In a type reference, the outer type parameters of the referenced class or interface are automatically
+                // supplied as type arguments and the type reference only specifies arguments for the local type parameters
+                // of the class or interface.
+                return createTypeReference(type, ts.concatenate(type.outerTypeParameters, ts.map(node.typeArguments, getTypeFromTypeNode)));
+            }
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
+                return unknownType;
+            }
+            return type;
+        }
+        // Get type from reference to type alias. When a type alias is generic, the declared type of the type alias may include
+        // references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
+        // declared type. Instantiations are cached using the type identities of the type arguments as the key.
+        function getTypeFromTypeAliasReference(node, symbol) {
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var links = getSymbolLinks(symbol);
+            var typeParameters = links.typeParameters;
+            if (typeParameters) {
+                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
+                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, symbolToString(symbol), typeParameters.length);
+                    return unknownType;
+                }
+                var typeArguments = ts.map(node.typeArguments, getTypeFromTypeNode);
+                var id = getTypeListId(typeArguments);
+                return links.instantiations[id] || (links.instantiations[id] = instantiateType(type, createTypeMapper(typeParameters, typeArguments)));
+            }
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return type;
+        }
+        // Get type from reference to named type that cannot be generic (enum or type parameter)
+        function getTypeFromNonGenericTypeReference(node, symbol) {
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return getDeclaredTypeOfSymbol(symbol);
+        }
+        function getTypeReferenceName(node) {
+            switch (node.kind) {
+                case 155 /* TypeReference */:
+                    return node.typeName;
+                case 267 /* JSDocTypeReference */:
+                    return node.name;
+                case 194 /* ExpressionWithTypeArguments */:
+                    // We only support expressions that are simple qualified names. For other
+                    // expressions this produces undefined.
+                    if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                        return node.expression;
+                    }
+            }
+            return undefined;
+        }
+        function resolveTypeReferenceName(node, typeReferenceName) {
+            if (!typeReferenceName) {
+                return unknownSymbol;
+            }
+            return resolveEntityName(typeReferenceName, 793056 /* Type */) || unknownSymbol;
+        }
+        function getTypeReferenceType(node, symbol) {
+            if (symbol === unknownSymbol) {
+                return unknownType;
+            }
+            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                return getTypeFromClassOrInterfaceReference(node, symbol);
+            }
+            if (symbol.flags & 524288 /* TypeAlias */) {
+                return getTypeFromTypeAliasReference(node, symbol);
+            }
+            if (symbol.flags & 107455 /* Value */ && node.kind === 267 /* JSDocTypeReference */) {
+                // A JSDocTypeReference may have resolved to a value (as opposed to a type). In
+                // that case, the type of this reference is just the type of the value we resolved
+                // to.
+                return getTypeOfSymbol(symbol);
+            }
+            return getTypeFromNonGenericTypeReference(node, symbol);
+        }
+        function getTypeFromTypeReference(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var symbol = void 0;
+                var type = void 0;
+                if (node.kind === 267 /* JSDocTypeReference */) {
+                    var typeReferenceName = getTypeReferenceName(node);
+                    symbol = resolveTypeReferenceName(node, typeReferenceName);
+                    type = getTypeReferenceType(node, symbol);
+                    links.resolvedSymbol = symbol;
+                    links.resolvedType = type;
+                }
+                else {
+                    // We only support expressions that are simple qualified names. For other expressions this produces undefined.
+                    var typeNameOrExpression = node.kind === 155 /* TypeReference */ ? node.typeName :
+                        ts.isSupportedExpressionWithTypeArguments(node) ? node.expression :
+                            undefined;
+                    symbol = typeNameOrExpression && resolveEntityName(typeNameOrExpression, 793056 /* Type */) || unknownSymbol;
+                    type = symbol === unknownSymbol ? unknownType :
+                        symbol.flags & (32 /* Class */ | 64 /* Interface */) ? getTypeFromClassOrInterfaceReference(node, symbol) :
+                            symbol.flags & 524288 /* TypeAlias */ ? getTypeFromTypeAliasReference(node, symbol) :
+                                getTypeFromNonGenericTypeReference(node, symbol);
+                }
+                // Cache both the resolved symbol and the resolved type. The resolved symbol is needed in when we check the
+                // type reference in checkTypeReferenceOrExpressionWithTypeArguments.
+                links.resolvedSymbol = symbol;
+                links.resolvedType = type;
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeQueryNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // TypeScript 1.0 spec (April 2014): 3.6.3
+                // The expression is processed as an identifier expression (section 4.3)
+                // or property access expression(section 4.10),
+                // the widened type(section 3.9) of which becomes the result.
+                links.resolvedType = getWidenedType(checkExpression(node.exprName));
+            }
+            return links.resolvedType;
+        }
+        function getTypeOfGlobalSymbol(symbol, arity) {
+            function getTypeDeclaration(symbol) {
+                var declarations = symbol.declarations;
+                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
+                    var declaration = declarations_3[_i];
+                    switch (declaration.kind) {
+                        case 221 /* ClassDeclaration */:
+                        case 222 /* InterfaceDeclaration */:
+                        case 224 /* EnumDeclaration */:
+                            return declaration;
+                    }
+                }
+            }
+            if (!symbol) {
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            var type = getDeclaredTypeOfSymbol(symbol);
+            if (!(type.flags & 80896 /* ObjectType */)) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            if ((type.typeParameters ? type.typeParameters.length : 0) !== arity) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            return type;
+        }
+        function getGlobalValueSymbol(name) {
+            return getGlobalSymbol(name, 107455 /* Value */, ts.Diagnostics.Cannot_find_global_value_0);
+        }
+        function getGlobalTypeSymbol(name) {
+            return getGlobalSymbol(name, 793056 /* Type */, ts.Diagnostics.Cannot_find_global_type_0);
+        }
+        function getGlobalSymbol(name, meaning, diagnostic) {
+            return resolveName(undefined, name, meaning, diagnostic, name);
+        }
+        function getGlobalType(name, arity) {
+            if (arity === void 0) { arity = 0; }
+            return getTypeOfGlobalSymbol(getGlobalTypeSymbol(name), arity);
+        }
+        /**
+         * Returns a type that is inside a namespace at the global scope, e.g.
+         * getExportedTypeFromNamespace('JSX', 'Element') returns the JSX.Element type
+         */
+        function getExportedTypeFromNamespace(namespace, name) {
+            var namespaceSymbol = getGlobalSymbol(namespace, 1536 /* Namespace */, /*diagnosticMessage*/ undefined);
+            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793056 /* Type */);
+            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
+        }
+        /**
+          * Creates a TypeReference for a generic `TypedPropertyDescriptor<T>`.
+          */
+        function createTypedPropertyDescriptorType(propertyType) {
+            var globalTypedPropertyDescriptorType = getGlobalTypedPropertyDescriptorType();
+            return globalTypedPropertyDescriptorType !== emptyGenericType
+                ? createTypeReference(globalTypedPropertyDescriptorType, [propertyType])
+                : emptyObjectType;
+        }
+        /**
+         * Instantiates a global type that is generic with some element type, and returns that instantiation.
+         */
+        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
+            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
+        }
+        function createIterableType(elementType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableType(), [elementType]);
+        }
+        function createIterableIteratorType(elementType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(), [elementType]);
+        }
+        function createArrayType(elementType) {
+            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
+        }
+        function getTypeFromArrayTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
+            }
+            return links.resolvedType;
+        }
+        function createTupleType(elementTypes) {
+            var id = getTypeListId(elementTypes);
+            return tupleTypes[id] || (tupleTypes[id] = createNewTupleType(elementTypes));
+        }
+        function createNewTupleType(elementTypes) {
+            var propagatedFlags = getPropagatingFlagsOfTypes(elementTypes, /*excludeKinds*/ 0);
+            var type = createObjectType(8192 /* Tuple */ | propagatedFlags);
+            type.elementTypes = elementTypes;
+            return type;
+        }
+        function getTypeFromTupleTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNode));
+            }
+            return links.resolvedType;
+        }
+        function addTypeToSet(typeSet, type, typeSetKind) {
+            if (type.flags & typeSetKind) {
+                addTypesToSet(typeSet, type.types, typeSetKind);
+            }
+            else if (type.flags & (1 /* Any */ | 32 /* Undefined */ | 64 /* Null */)) {
+                if (type.flags & 1 /* Any */)
+                    typeSet.containsAny = true;
+                if (type.flags & 32 /* Undefined */)
+                    typeSet.containsUndefined = true;
+                if (type.flags & 64 /* Null */)
+                    typeSet.containsNull = true;
+                if (!(type.flags & 2097152 /* ContainsWideningType */))
+                    typeSet.containsNonWideningType = true;
+            }
+            else if (type !== neverType && !ts.contains(typeSet, type)) {
+                typeSet.push(type);
+            }
+        }
+        // Add the given types to the given type set. Order is preserved, duplicates are removed,
+        // and nested types of the given kind are flattened into the set.
+        function addTypesToSet(typeSet, types, typeSetKind) {
+            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
+                var type = types_4[_i];
+                addTypeToSet(typeSet, type, typeSetKind);
+            }
+        }
+        function isSubtypeOfAny(candidate, types) {
+            for (var i = 0, len = types.length; i < len; i++) {
+                if (candidate !== types[i] && isTypeSubtypeOf(candidate, types[i])) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function removeSubtypes(types) {
+            var i = types.length;
+            while (i > 0) {
+                i--;
+                if (isSubtypeOfAny(types[i], types)) {
+                    types.splice(i, 1);
+                }
+            }
+        }
+        // We reduce the constituent type set to only include types that aren't subtypes of other types, unless
+        // the noSubtypeReduction flag is specified, in which case we perform a simple deduplication based on
+        // object identity. Subtype reduction is possible only when union types are known not to circularly
+        // reference themselves (as is the case with union types created by expression constructs such as array
+        // literals and the || and ?: operators). Named types can circularly reference themselves and therefore
+        // cannot be deduplicated during their declaration. For example, "type Item = string | (() => Item" is
+        // a named type that circularly references itself.
+        function getUnionType(types, noSubtypeReduction) {
+            if (types.length === 0) {
+                return neverType;
+            }
+            if (types.length === 1) {
+                return types[0];
+            }
+            var typeSet = [];
+            addTypesToSet(typeSet, types, 16384 /* Union */);
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (strictNullChecks) {
+                if (typeSet.containsNull)
+                    typeSet.push(nullType);
+                if (typeSet.containsUndefined)
+                    typeSet.push(undefinedType);
+            }
+            if (!noSubtypeReduction) {
+                removeSubtypes(typeSet);
+            }
+            if (typeSet.length === 0) {
+                return typeSet.containsNull ? typeSet.containsNonWideningType ? nullType : nullWideningType :
+                    typeSet.containsUndefined ? typeSet.containsNonWideningType ? undefinedType : undefinedWideningType :
+                        neverType;
+            }
+            else if (typeSet.length === 1) {
+                return typeSet[0];
+            }
+            var id = getTypeListId(typeSet);
+            var type = unionTypes[id];
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 96 /* Nullable */);
+                type = unionTypes[id] = createObjectType(16384 /* Union */ | propagatedFlags);
+                type.types = typeSet;
+            }
+            return type;
+        }
+        function getTypeFromUnionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), /*noSubtypeReduction*/ true);
+            }
+            return links.resolvedType;
+        }
+        // We do not perform structural deduplication on intersection types. Intersection types are created only by the &
+        // type operator and we can't reduce those because we want to support recursive intersection types. For example,
+        // a type alias of the form "type List<T> = T & { next: List<T> }" cannot be reduced during its declaration.
+        // Also, unlike union types, the order of the constituent types is preserved in order that overload resolution
+        // for intersections of types with signatures can be deterministic.
+        function getIntersectionType(types) {
+            if (types.length === 0) {
+                return emptyObjectType;
+            }
+            var typeSet = [];
+            addTypesToSet(typeSet, types, 32768 /* Intersection */);
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (strictNullChecks) {
+                if (typeSet.containsNull)
+                    typeSet.push(nullType);
+                if (typeSet.containsUndefined)
+                    typeSet.push(undefinedType);
+            }
+            if (typeSet.length === 1) {
+                return typeSet[0];
+            }
+            var id = getTypeListId(typeSet);
+            var type = intersectionTypes[id];
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 96 /* Nullable */);
+                type = intersectionTypes[id] = createObjectType(32768 /* Intersection */ | propagatedFlags);
+                type.types = typeSet;
+            }
+            return type;
+        }
+        function getTypeFromIntersectionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNode));
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // Deferred resolution of members is handled by resolveObjectTypeMembers
+                links.resolvedType = createObjectType(65536 /* Anonymous */, node.symbol);
+            }
+            return links.resolvedType;
+        }
+        function getStringLiteralTypeForText(text) {
+            if (ts.hasProperty(stringLiteralTypes, text)) {
+                return stringLiteralTypes[text];
+            }
+            var type = stringLiteralTypes[text] = createType(256 /* StringLiteral */);
+            type.text = text;
+            return type;
+        }
+        function getTypeFromStringLiteralTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getStringLiteralTypeForText(ts.unescapeIdentifier(node.text));
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocVariadicType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var type = getTypeFromTypeNode(node.type);
+                links.resolvedType = type ? createArrayType(type) : unknownType;
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocTupleType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var types = ts.map(node.types, getTypeFromTypeNode);
+                links.resolvedType = createTupleType(types);
+            }
+            return links.resolvedType;
+        }
+        function getThisType(node) {
+            var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+            var parent = container && container.parent;
+            if (parent && (ts.isClassLike(parent) || parent.kind === 222 /* InterfaceDeclaration */)) {
+                if (!(container.flags & 32 /* Static */) &&
+                    (container.kind !== 148 /* Constructor */ || ts.isNodeDescendentOf(node, container.body))) {
+                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
+                }
+            }
+            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
+            return unknownType;
+        }
+        function getTypeFromThisTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getThisType(node);
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeNode(node) {
+            switch (node.kind) {
+                case 117 /* AnyKeyword */:
+                case 258 /* JSDocAllType */:
+                case 259 /* JSDocUnknownType */:
+                    return anyType;
+                case 132 /* StringKeyword */:
+                    return stringType;
+                case 130 /* NumberKeyword */:
+                    return numberType;
+                case 120 /* BooleanKeyword */:
+                    return booleanType;
+                case 133 /* SymbolKeyword */:
+                    return esSymbolType;
+                case 103 /* VoidKeyword */:
+                    return voidType;
+                case 135 /* UndefinedKeyword */:
+                    return undefinedType;
+                case 93 /* NullKeyword */:
+                    return nullType;
+                case 127 /* NeverKeyword */:
+                    return neverType;
+                case 165 /* ThisType */:
+                case 97 /* ThisKeyword */:
+                    return getTypeFromThisTypeNode(node);
+                case 166 /* StringLiteralType */:
+                    return getTypeFromStringLiteralTypeNode(node);
+                case 155 /* TypeReference */:
+                case 267 /* JSDocTypeReference */:
+                    return getTypeFromTypeReference(node);
+                case 154 /* TypePredicate */:
+                    return booleanType;
+                case 194 /* ExpressionWithTypeArguments */:
+                    return getTypeFromTypeReference(node);
+                case 158 /* TypeQuery */:
+                    return getTypeFromTypeQueryNode(node);
+                case 160 /* ArrayType */:
+                case 260 /* JSDocArrayType */:
+                    return getTypeFromArrayTypeNode(node);
+                case 161 /* TupleType */:
+                    return getTypeFromTupleTypeNode(node);
+                case 162 /* UnionType */:
+                case 261 /* JSDocUnionType */:
+                    return getTypeFromUnionTypeNode(node);
+                case 163 /* IntersectionType */:
+                    return getTypeFromIntersectionTypeNode(node);
+                case 164 /* ParenthesizedType */:
+                case 263 /* JSDocNullableType */:
+                case 264 /* JSDocNonNullableType */:
+                case 271 /* JSDocConstructorType */:
+                case 272 /* JSDocThisType */:
+                case 268 /* JSDocOptionalType */:
+                    return getTypeFromTypeNode(node.type);
+                case 156 /* FunctionType */:
+                case 157 /* ConstructorType */:
+                case 159 /* TypeLiteral */:
+                case 281 /* JSDocTypeLiteral */:
+                case 269 /* JSDocFunctionType */:
+                case 265 /* JSDocRecordType */:
+                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                // This function assumes that an identifier or qualified name is a type expression
+                // Callers should first ensure this by calling isTypeNode
+                case 69 /* Identifier */:
+                case 139 /* QualifiedName */:
+                    var symbol = getSymbolAtLocation(node);
+                    return symbol && getDeclaredTypeOfSymbol(symbol);
+                case 262 /* JSDocTupleType */:
+                    return getTypeFromJSDocTupleType(node);
+                case 270 /* JSDocVariadicType */:
+                    return getTypeFromJSDocVariadicType(node);
+                default:
+                    return unknownType;
+            }
+        }
+        function instantiateList(items, mapper, instantiator) {
+            if (items && items.length) {
+                var result = [];
+                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
+                    var v = items_1[_i];
+                    result.push(instantiator(v, mapper));
+                }
+                return result;
+            }
+            return items;
+        }
+        function createUnaryTypeMapper(source, target) {
+            return function (t) { return t === source ? target : t; };
+        }
+        function createBinaryTypeMapper(source1, target1, source2, target2) {
+            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
+        }
+        function createArrayTypeMapper(sources, targets) {
+            return function (t) {
+                for (var i = 0; i < sources.length; i++) {
+                    if (t === sources[i]) {
+                        return targets ? targets[i] : anyType;
+                    }
+                }
+                return t;
+            };
+        }
+        function createTypeMapper(sources, targets) {
+            var count = sources.length;
+            var mapper = count == 1 ? createUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
+                count == 2 ? createBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
+                    createArrayTypeMapper(sources, targets);
+            mapper.mappedTypes = sources;
+            return mapper;
+        }
+        function createTypeEraser(sources) {
+            return createTypeMapper(sources, undefined);
+        }
+        function getInferenceMapper(context) {
+            if (!context.mapper) {
+                var mapper = function (t) {
+                    var typeParameters = context.typeParameters;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (t === typeParameters[i]) {
+                            context.inferences[i].isFixed = true;
+                            return getInferredType(context, i);
+                        }
+                    }
+                    return t;
+                };
+                mapper.mappedTypes = context.typeParameters;
+                mapper.context = context;
+                context.mapper = mapper;
+            }
+            return context.mapper;
+        }
+        function identityMapper(type) {
+            return type;
+        }
+        function combineTypeMappers(mapper1, mapper2) {
+            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
+            mapper.mappedTypes = mapper1.mappedTypes;
+            return mapper;
+        }
+        function cloneTypeParameter(typeParameter) {
+            var result = createType(512 /* TypeParameter */);
+            result.symbol = typeParameter.symbol;
+            result.target = typeParameter;
+            return result;
+        }
+        function cloneTypePredicate(predicate, mapper) {
+            if (ts.isIdentifierTypePredicate(predicate)) {
+                return {
+                    kind: 1 /* Identifier */,
+                    parameterName: predicate.parameterName,
+                    parameterIndex: predicate.parameterIndex,
+                    type: instantiateType(predicate.type, mapper)
+                };
+            }
+            else {
+                return {
+                    kind: 0 /* This */,
+                    type: instantiateType(predicate.type, mapper)
+                };
+            }
+        }
+        function instantiateSignature(signature, mapper, eraseTypeParameters) {
+            var freshTypeParameters;
+            var freshTypePredicate;
+            if (signature.typeParameters && !eraseTypeParameters) {
+                // First create a fresh set of type parameters, then include a mapping from the old to the
+                // new type parameters in the mapper function. Finally store this mapper in the new type
+                // parameters such that we can use it when instantiating constraints.
+                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
+                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
+                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
+                    var tp = freshTypeParameters_1[_i];
+                    tp.mapper = mapper;
+                }
+            }
+            if (signature.typePredicate) {
+                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
+            }
+            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisType && instantiateType(signature.thisType, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), instantiateType(signature.resolvedReturnType, mapper), freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasStringLiterals);
+            result.target = signature;
+            result.mapper = mapper;
+            return result;
+        }
+        function instantiateSymbol(symbol, mapper) {
+            if (symbol.flags & 16777216 /* Instantiated */) {
+                var links = getSymbolLinks(symbol);
+                // If symbol being instantiated is itself a instantiation, fetch the original target and combine the
+                // type mappers. This ensures that original type identities are properly preserved and that aliases
+                // always reference a non-aliases.
+                symbol = links.target;
+                mapper = combineTypeMappers(links.mapper, mapper);
+            }
+            // Keep the flags from the symbol we're instantiating.  Mark that is instantiated, and
+            // also transient so that we can just store data on it directly.
+            var result = createSymbol(16777216 /* Instantiated */ | 67108864 /* Transient */ | symbol.flags, symbol.name);
+            result.declarations = symbol.declarations;
+            result.parent = symbol.parent;
+            result.target = symbol;
+            result.mapper = mapper;
+            if (symbol.valueDeclaration) {
+                result.valueDeclaration = symbol.valueDeclaration;
+            }
+            return result;
+        }
+        function instantiateAnonymousType(type, mapper) {
+            if (mapper.instantiations) {
+                var cachedType = mapper.instantiations[type.id];
+                if (cachedType) {
+                    return cachedType;
+                }
+            }
+            else {
+                mapper.instantiations = [];
+            }
+            // Mark the anonymous type as instantiated such that our infinite instantiation detection logic can recognize it
+            var result = createObjectType(65536 /* Anonymous */ | 131072 /* Instantiated */, type.symbol);
+            result.target = type;
+            result.mapper = mapper;
+            mapper.instantiations[type.id] = result;
+            return result;
+        }
+        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
+            var mappedTypes = mapper.mappedTypes;
+            // Starting with the parent of the symbol's declaration, check if the mapper maps any of
+            // the type parameters introduced by enclosing declarations. We just pick the first
+            // declaration since multiple declarations will all have the same parent anyway.
+            var node = symbol.declarations[0].parent;
+            while (node) {
+                switch (node.kind) {
+                    case 156 /* FunctionType */:
+                    case 157 /* ConstructorType */:
+                    case 220 /* FunctionDeclaration */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 148 /* Constructor */:
+                    case 151 /* CallSignature */:
+                    case 152 /* ConstructSignature */:
+                    case 153 /* IndexSignature */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 223 /* TypeAliasDeclaration */:
+                        var declaration = node;
+                        if (declaration.typeParameters) {
+                            for (var _i = 0, _a = declaration.typeParameters; _i < _a.length; _i++) {
+                                var d = _a[_i];
+                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
+                                    return true;
+                                }
+                            }
+                        }
+                        if (ts.isClassLike(node) || node.kind === 222 /* InterfaceDeclaration */) {
+                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
+                            if (thisType && ts.contains(mappedTypes, thisType)) {
+                                return true;
+                            }
+                        }
+                        break;
+                    case 225 /* ModuleDeclaration */:
+                    case 256 /* SourceFile */:
+                        return false;
+                }
+                node = node.parent;
+            }
+            return false;
+        }
+        function instantiateType(type, mapper) {
+            if (type && mapper !== identityMapper) {
+                if (type.flags & 512 /* TypeParameter */) {
+                    return mapper(type);
+                }
+                if (type.flags & 65536 /* Anonymous */) {
+                    // If the anonymous type originates in a declaration of a function, method, class, or
+                    // interface, in an object type literal, or in an object literal expression, we may need
+                    // to instantiate the type because it might reference a type parameter. We skip instantiation
+                    // if none of the type parameters that are in scope in the type's declaration are mapped by
+                    // the given mapper, however we can only do that analysis if the type isn't itself an
+                    // instantiation.
+                    return type.symbol &&
+                        type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */) &&
+                        (type.flags & 131072 /* Instantiated */ || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
+                        instantiateAnonymousType(type, mapper) : type;
+                }
+                if (type.flags & 4096 /* Reference */) {
+                    return createTypeReference(type.target, instantiateList(type.typeArguments, mapper, instantiateType));
+                }
+                if (type.flags & 8192 /* Tuple */) {
+                    return createTupleType(instantiateList(type.elementTypes, mapper, instantiateType));
+                }
+                if (type.flags & 16384 /* Union */) {
+                    return getUnionType(instantiateList(type.types, mapper, instantiateType), /*noSubtypeReduction*/ true);
+                }
+                if (type.flags & 32768 /* Intersection */) {
+                    return getIntersectionType(instantiateList(type.types, mapper, instantiateType));
+                }
+            }
+            return type;
+        }
+        function instantiateIndexInfo(info, mapper) {
+            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
+        }
+        // Returns true if the given expression contains (at any level of nesting) a function or arrow expression
+        // that is subject to contextual typing.
+        function isContextSensitive(node) {
+            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            switch (node.kind) {
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 171 /* ObjectLiteralExpression */:
+                    return ts.forEach(node.properties, isContextSensitive);
+                case 170 /* ArrayLiteralExpression */:
+                    return ts.forEach(node.elements, isContextSensitive);
+                case 188 /* ConditionalExpression */:
+                    return isContextSensitive(node.whenTrue) ||
+                        isContextSensitive(node.whenFalse);
+                case 187 /* BinaryExpression */:
+                    return node.operatorToken.kind === 52 /* BarBarToken */ &&
+                        (isContextSensitive(node.left) || isContextSensitive(node.right));
+                case 253 /* PropertyAssignment */:
+                    return isContextSensitive(node.initializer);
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 178 /* ParenthesizedExpression */:
+                    return isContextSensitive(node.expression);
+            }
+            return false;
+        }
+        function isContextSensitiveFunctionLikeDeclaration(node) {
+            var areAllParametersUntyped = !ts.forEach(node.parameters, function (p) { return p.type; });
+            var isNullaryArrow = node.kind === 180 /* ArrowFunction */ && !node.parameters.length;
+            return !node.typeParameters && areAllParametersUntyped && !isNullaryArrow;
+        }
+        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
+            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
+        }
+        function getTypeWithoutSignatures(type) {
+            if (type.flags & 80896 /* ObjectType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.constructSignatures.length) {
+                    var result = createObjectType(65536 /* Anonymous */, type.symbol);
+                    result.members = resolved.members;
+                    result.properties = resolved.properties;
+                    result.callSignatures = emptyArray;
+                    result.constructSignatures = emptyArray;
+                    type = result;
+                }
+            }
+            return type;
+        }
+        // TYPE CHECKING
+        function isTypeIdenticalTo(source, target) {
+            return checkTypeRelatedTo(source, target, identityRelation, /*errorNode*/ undefined);
+        }
+        function compareTypesIdentical(source, target) {
+            return checkTypeRelatedTo(source, target, identityRelation, /*errorNode*/ undefined) ? -1 /* True */ : 0 /* False */;
+        }
+        function compareTypesAssignable(source, target) {
+            return checkTypeRelatedTo(source, target, assignableRelation, /*errorNode*/ undefined) ? -1 /* True */ : 0 /* False */;
+        }
+        function isTypeSubtypeOf(source, target) {
+            return checkTypeSubtypeOf(source, target, /*errorNode*/ undefined);
+        }
+        function isTypeAssignableTo(source, target) {
+            return checkTypeAssignableTo(source, target, /*errorNode*/ undefined);
+        }
+        /**
+         * This is *not* a bi-directional relationship.
+         * If one needs to check both directions for comparability, use a second call to this function or 'checkTypeComparableTo'.
+         */
+        function isTypeComparableTo(source, target) {
+            return checkTypeComparableTo(source, target, /*errorNode*/ undefined);
+        }
+        function checkTypeSubtypeOf(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        /**
+         * This is *not* a bi-directional relationship.
+         * If one needs to check both directions for comparability, use a second call to this function or 'isTypeComparableTo'.
+         */
+        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
+            return compareSignaturesRelated(source, target, ignoreReturnTypes, /*reportErrors*/ false, /*errorReporter*/ undefined, compareTypesAssignable) !== 0 /* False */;
+        }
+        /**
+         * See signatureRelatedTo, compareSignaturesIdentical
+         */
+        function compareSignaturesRelated(source, target, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
+            // TODO (drosen): De-duplicate code between related functions.
+            if (source === target) {
+                return -1 /* True */;
+            }
+            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
+                return 0 /* False */;
+            }
+            // Spec 1.0 Section 3.8.3 & 3.8.4:
+            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
+            source = getErasedSignature(source);
+            target = getErasedSignature(target);
+            var result = -1 /* True */;
+            if (source.thisType && target.thisType && source.thisType !== voidType) {
+                // void sources are assignable to anything.
+                var related = compareTypes(source.thisType, target.thisType, /*reportErrors*/ false)
+                    || compareTypes(target.thisType, source.thisType, reportErrors);
+                if (!related) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
+                    }
+                    return 0 /* False */;
+                }
+                result &= related;
+            }
+            var sourceMax = getNumNonRestParameters(source);
+            var targetMax = getNumNonRestParameters(target);
+            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
+            var sourceParams = source.parameters;
+            var targetParams = target.parameters;
+            for (var i = 0; i < checkCount; i++) {
+                var s = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
+                var t = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
+                var related = compareTypes(s, t, /*reportErrors*/ false) || compareTypes(t, s, reportErrors);
+                if (!related) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
+                    }
+                    return 0 /* False */;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                var targetReturnType = getReturnTypeOfSignature(target);
+                if (targetReturnType === voidType) {
+                    return result;
+                }
+                var sourceReturnType = getReturnTypeOfSignature(source);
+                // The following block preserves behavior forbidding boolean returning functions from being assignable to type guard returning functions
+                if (target.typePredicate) {
+                    if (source.typePredicate) {
+                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
+                    }
+                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
+                        if (reportErrors) {
+                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
+                        }
+                        return 0 /* False */;
+                    }
+                }
+                else {
+                    result &= compareTypes(sourceReturnType, targetReturnType, reportErrors);
+                }
+            }
+            return result;
+        }
+        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
+            if (source.kind !== target.kind) {
+                if (reportErrors) {
+                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
+                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                }
+                return 0 /* False */;
+            }
+            if (source.kind === 1 /* Identifier */) {
+                var sourceIdentifierPredicate = source;
+                var targetIdentifierPredicate = target;
+                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
+                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                    }
+                    return 0 /* False */;
+                }
+            }
+            var related = compareTypes(source.type, target.type, reportErrors);
+            if (related === 0 /* False */ && reportErrors) {
+                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+            }
+            return related;
+        }
+        function isImplementationCompatibleWithOverload(implementation, overload) {
+            var erasedSource = getErasedSignature(implementation);
+            var erasedTarget = getErasedSignature(overload);
+            // First see if the return types are compatible in either direction.
+            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
+            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
+            if (targetReturnType === voidType
+                || checkTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation, /*errorNode*/ undefined)
+                || checkTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation, /*errorNode*/ undefined)) {
+                return isSignatureAssignableTo(erasedSource, erasedTarget, /*ignoreReturnTypes*/ true);
+            }
+            return false;
+        }
+        function getNumNonRestParameters(signature) {
+            var numParams = signature.parameters.length;
+            return signature.hasRestParameter ?
+                numParams - 1 :
+                numParams;
+        }
+        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
+            if (source.hasRestParameter === target.hasRestParameter) {
+                if (source.hasRestParameter) {
+                    // If both have rest parameters, get the max and add 1 to
+                    // compensate for the rest parameter.
+                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
+                }
+                else {
+                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
+                }
+            }
+            else {
+                // Return the count for whichever signature doesn't have rest parameters.
+                return source.hasRestParameter ?
+                    targetNonRestParamCount :
+                    sourceNonRestParamCount;
+            }
+        }
+        /**
+         * Checks if 'source' is related to 'target' (e.g.: is a assignable to).
+         * @param source The left-hand-side of the relation.
+         * @param target The right-hand-side of the relation.
+         * @param relation The relation considered. One of 'identityRelation', 'subtypeRelation', 'assignableRelation', or 'comparableRelation'.
+         * Used as both to determine which checks are performed and as a cache of previously computed results.
+         * @param errorNode The suggested node upon which all errors will be reported, if defined. This may or may not be the actual node used.
+         * @param headMessage If the error chain should be prepended by a head message, then headMessage will be used.
+         * @param containingMessageChain A chain of errors to prepend any new errors found.
+         */
+        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
+            var errorInfo;
+            var sourceStack;
+            var targetStack;
+            var maybeStack;
+            var expandingFlags;
+            var depth = 0;
+            var overflow = false;
+            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
+            var result = isRelatedTo(source, target, /*reportErrors*/ !!errorNode, headMessage);
+            if (overflow) {
+                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
+            }
+            else if (errorInfo) {
+                if (containingMessageChain) {
+                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
+                }
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
+            }
+            return result !== 0 /* False */;
+            function reportError(message, arg0, arg1, arg2) {
+                ts.Debug.assert(!!errorNode);
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+            }
+            function reportRelationError(message, source, target) {
+                var sourceType = typeToString(source);
+                var targetType = typeToString(target);
+                if (sourceType === targetType) {
+                    sourceType = typeToString(source, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */);
+                    targetType = typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */);
+                }
+                if (!message) {
+                    message = relation === comparableRelation ?
+                        ts.Diagnostics.Type_0_is_not_comparable_to_type_1 :
+                        ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
+                }
+                reportError(message, sourceType, targetType);
+            }
+            // Compare two types and return
+            // Ternary.True if they are related with no assumptions,
+            // Ternary.Maybe if they are related with assumptions of other relationships, or
+            // Ternary.False if they are not related.
+            function isRelatedTo(source, target, reportErrors, headMessage) {
+                var result;
+                // both types are the same - covers 'they are the same primitive type or both are Any' or the same type parameter cases
+                if (source === target)
+                    return -1 /* True */;
+                if (relation === identityRelation) {
+                    return isIdenticalTo(source, target);
+                }
+                if (!(target.flags & 134217728 /* Never */)) {
+                    if (target.flags & 1 /* Any */ || source.flags & 134217728 /* Never */)
+                        return -1 /* True */;
+                    if (source.flags & 32 /* Undefined */) {
+                        if (!strictNullChecks || target.flags & (32 /* Undefined */ | 16 /* Void */))
+                            return -1 /* True */;
+                    }
+                    if (source.flags & 64 /* Null */) {
+                        if (!strictNullChecks || target.flags & 64 /* Null */)
+                            return -1 /* True */;
+                    }
+                    if (source.flags & 128 /* Enum */ && target === numberType)
+                        return -1 /* True */;
+                    if (source.flags & 128 /* Enum */ && target.flags & 128 /* Enum */) {
+                        if (result = enumRelatedTo(source, target, reportErrors)) {
+                            return result;
+                        }
+                    }
+                    if (source.flags & 256 /* StringLiteral */ && target === stringType)
+                        return -1 /* True */;
+                    if (relation === assignableRelation || relation === comparableRelation) {
+                        if (source.flags & 1 /* Any */)
+                            return -1 /* True */;
+                        if (source === numberType && target.flags & 128 /* Enum */)
+                            return -1 /* True */;
+                    }
+                    if (source.flags & 8 /* Boolean */ && target.flags & 8 /* Boolean */) {
+                        return -1 /* True */;
+                    }
+                }
+                if (source.flags & 1048576 /* FreshObjectLiteral */) {
+                    if (hasExcessProperties(source, target, reportErrors)) {
+                        if (reportErrors) {
+                            reportRelationError(headMessage, source, target);
+                        }
+                        return 0 /* False */;
+                    }
+                    // Above we check for excess properties with respect to the entire target type. When union
+                    // and intersection types are further deconstructed on the target side, we don't want to
+                    // make the check again (as it might fail for a partial target type). Therefore we obtain
+                    // the regular source type and proceed with that.
+                    if (target.flags & 49152 /* UnionOrIntersection */) {
+                        source = getRegularTypeOfObjectLiteral(source);
+                    }
+                }
+                var saveErrorInfo = errorInfo;
+                // Note that these checks are specifically ordered to produce correct results.
+                if (source.flags & 16384 /* Union */) {
+                    if (relation === comparableRelation) {
+                        result = someTypeRelatedToType(source, target, reportErrors);
+                    }
+                    else {
+                        result = eachTypeRelatedToType(source, target, reportErrors);
+                    }
+                    if (result) {
+                        return result;
+                    }
+                }
+                else if (target.flags & 32768 /* Intersection */) {
+                    result = typeRelatedToEachType(source, target, reportErrors);
+                    if (result) {
+                        return result;
+                    }
+                }
+                else {
+                    // It is necessary to try these "some" checks on both sides because there may be nested "each" checks
+                    // on either side that need to be prioritized. For example, A | B = (A | B) & (C | D) or
+                    // A & B = (A & B) | (C & D).
+                    if (source.flags & 32768 /* Intersection */) {
+                        // Check to see if any constituents of the intersection are immediately related to the target.
+                        //
+                        // Don't report errors though. Checking whether a constituent is related to the source is not actually
+                        // useful and leads to some confusing error messages. Instead it is better to let the below checks
+                        // take care of this, or to not elaborate at all. For instance,
+                        //
+                        //    - For an object type (such as 'C = A & B'), users are usually more interested in structural errors.
+                        //
+                        //    - For a union type (such as '(A | B) = (C & D)'), it's better to hold onto the whole intersection
+                        //          than to report that 'D' is not assignable to 'A' or 'B'.
+                        //
+                        //    - For a primitive type or type parameter (such as 'number = A & B') there is no point in
+                        //          breaking the intersection apart.
+                        if (result = someTypeRelatedToType(source, target, /*reportErrors*/ false)) {
+                            return result;
+                        }
+                    }
+                    if (target.flags & 16384 /* Union */) {
+                        if (result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 16777726 /* Primitive */))) {
+                            return result;
+                        }
+                    }
+                }
+                if (source.flags & 512 /* TypeParameter */) {
+                    var constraint = getConstraintOfTypeParameter(source);
+                    if (!constraint || constraint.flags & 1 /* Any */) {
+                        constraint = emptyObjectType;
+                    }
+                    // The constraint may need to be further instantiated with its 'this' type.
+                    constraint = getTypeWithThisArgument(constraint, source);
+                    // Report constraint errors only if the constraint is not the empty object type
+                    var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
+                    if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
+                        errorInfo = saveErrorInfo;
+                        return result;
+                    }
+                }
+                else {
+                    if (source.flags & 4096 /* Reference */ && target.flags & 4096 /* Reference */ && source.target === target.target) {
+                        // We have type references to same target type, see if relationship holds for all type arguments
+                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
+                            return result;
+                        }
+                    }
+                    // Even if relationship doesn't hold for unions, intersections, or generic type references,
+                    // it may hold in a structural comparison.
+                    var apparentSource = getApparentType(source);
+                    // In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
+                    // to X. Failing both of those we want to check if the aggregation of A and B's members structurally
+                    // relates to X. Thus, we include intersection types on the source side here.
+                    if (apparentSource.flags & (80896 /* ObjectType */ | 32768 /* Intersection */) && target.flags & 80896 /* ObjectType */) {
+                        // Report structural errors only if we haven't reported any errors yet
+                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !(source.flags & 16777726 /* Primitive */);
+                        if (result = objectTypeRelatedTo(apparentSource, source, target, reportStructuralErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
+                    }
+                }
+                if (reportErrors) {
+                    reportRelationError(headMessage, source, target);
+                }
+                return 0 /* False */;
+            }
+            function isIdenticalTo(source, target) {
+                var result;
+                if (source.flags & 80896 /* ObjectType */ && target.flags & 80896 /* ObjectType */) {
+                    if (source.flags & 4096 /* Reference */ && target.flags & 4096 /* Reference */ && source.target === target.target) {
+                        // We have type references to same target type, see if all type arguments are identical
+                        if (result = typeArgumentsRelatedTo(source, target, /*reportErrors*/ false)) {
+                            return result;
+                        }
+                    }
+                    return objectTypeRelatedTo(source, source, target, /*reportErrors*/ false);
+                }
+                if (source.flags & 16384 /* Union */ && target.flags & 16384 /* Union */ ||
+                    source.flags & 32768 /* Intersection */ && target.flags & 32768 /* Intersection */) {
+                    if (result = eachTypeRelatedToSomeType(source, target, /*reportErrors*/ false)) {
+                        if (result &= eachTypeRelatedToSomeType(target, source, /*reportErrors*/ false)) {
+                            return result;
+                        }
+                    }
+                }
+                return 0 /* False */;
+            }
+            // Check if a property with the given name is known anywhere in the given type. In an object type, a property
+            // is considered known if the object type is empty and the check is for assignability, if the object type has
+            // index signatures, or if the property is actually declared in the object type. In a union or intersection
+            // type, a property is considered known if it is known in any constituent type.
+            function isKnownProperty(type, name) {
+                if (type.flags & 80896 /* ObjectType */) {
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if ((relation === assignableRelation || relation === comparableRelation) && (type === globalObjectType || isEmptyObjectType(resolved)) ||
+                        resolved.stringIndexInfo ||
+                        (resolved.numberIndexInfo && isNumericLiteralName(name)) ||
+                        getPropertyOfType(type, name)) {
+                        return true;
+                    }
+                }
+                else if (type.flags & 49152 /* UnionOrIntersection */) {
+                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                        var t = _a[_i];
+                        if (isKnownProperty(t, name)) {
+                            return true;
+                        }
+                    }
+                }
+                return false;
+            }
+            function isEmptyObjectType(t) {
+                return t.properties.length === 0 &&
+                    t.callSignatures.length === 0 &&
+                    t.constructSignatures.length === 0 &&
+                    !t.stringIndexInfo &&
+                    !t.numberIndexInfo;
+            }
+            function hasExcessProperties(source, target, reportErrors) {
+                if (!(target.flags & 67108864 /* ObjectLiteralPatternWithComputedProperties */) && maybeTypeOfKind(target, 80896 /* ObjectType */)) {
+                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                        var prop = _a[_i];
+                        if (!isKnownProperty(target, prop.name)) {
+                            if (reportErrors) {
+                                // We know *exactly* where things went wrong when comparing the types.
+                                // Use this property as the error node as this will be more helpful in
+                                // reasoning about what went wrong.
+                                ts.Debug.assert(!!errorNode);
+                                errorNode = prop.valueDeclaration;
+                                reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
+                            }
+                            return true;
+                        }
+                    }
+                }
+                return false;
+            }
+            function eachTypeRelatedToSomeType(source, target, reportErrors) {
+                var result = -1 /* True */;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
+                    var sourceType = sourceTypes_1[_i];
+                    var related = typeRelatedToSomeType(sourceType, target, /*reportErrors*/ false);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeRelatedToSomeType(source, target, reportErrors) {
+                var targetTypes = target.types;
+                var len = targetTypes.length;
+                // The null and undefined types are guaranteed to be at the end of the constituent type list. In order
+                // to produce the best possible errors we first check the nullable types, such that the last type we
+                // check and report errors from is a non-nullable type if one is present.
+                while (len >= 2 && targetTypes[len - 1].flags & 96 /* Nullable */) {
+                    var related = isRelatedTo(source, targetTypes[len - 1], /*reportErrors*/ false);
+                    if (related) {
+                        return related;
+                    }
+                    len--;
+                }
+                // Now check the non-nullable types and report errors on the last one.
+                for (var i = 0; i < len; i++) {
+                    var related = isRelatedTo(source, targetTypes[i], reportErrors && i === len - 1);
+                    if (related) {
+                        return related;
+                    }
+                }
+                return 0 /* False */;
+            }
+            function typeRelatedToEachType(source, target, reportErrors) {
+                var result = -1 /* True */;
+                var targetTypes = target.types;
+                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
+                    var targetType = targetTypes_1[_i];
+                    var related = isRelatedTo(source, targetType, reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function someTypeRelatedToType(source, target, reportErrors) {
+                var sourceTypes = source.types;
+                var len = sourceTypes.length;
+                // The null and undefined types are guaranteed to be at the end of the constituent type list. In order
+                // to produce the best possible errors we first check the nullable types, such that the last type we
+                // check and report errors from is a non-nullable type if one is present.
+                while (len >= 2 && sourceTypes[len - 1].flags & 96 /* Nullable */) {
+                    var related = isRelatedTo(sourceTypes[len - 1], target, /*reportErrors*/ false);
+                    if (related) {
+                        return related;
+                    }
+                    len--;
+                }
+                // Now check the non-nullable types and report errors on the last one.
+                for (var i = 0; i < len; i++) {
+                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
+                    if (related) {
+                        return related;
+                    }
+                }
+                return 0 /* False */;
+            }
+            function eachTypeRelatedToType(source, target, reportErrors) {
+                var result = -1 /* True */;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
+                    var sourceType = sourceTypes_2[_i];
+                    var related = isRelatedTo(sourceType, target, reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeArgumentsRelatedTo(source, target, reportErrors) {
+                var sources = source.typeArguments || emptyArray;
+                var targets = target.typeArguments || emptyArray;
+                if (sources.length !== targets.length && relation === identityRelation) {
+                    return 0 /* False */;
+                }
+                var length = sources.length <= targets.length ? sources.length : targets.length;
+                var result = -1 /* True */;
+                for (var i = 0; i < length; i++) {
+                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            // Determine if two object types are related by structure. First, check if the result is already available in the global cache.
+            // Second, check if we have already started a comparison of the given two types in which case we assume the result to be true.
+            // Third, check if both types are part of deeply nested chains of generic type instantiations and if so assume the types are
+            // equal and infinitely expanding. Fourth, if we have reached a depth of 100 nested comparisons, assume we have runaway recursion
+            // and issue an error. Otherwise, actually compare the structure of the two types.
+            function objectTypeRelatedTo(source, originalSource, target, reportErrors) {
+                if (overflow) {
+                    return 0 /* False */;
+                }
+                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
+                var related = relation[id];
+                if (related !== undefined) {
+                    if (reportErrors && related === 2 /* Failed */) {
+                        // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported
+                        // failure and continue computing the relation such that errors get reported.
+                        relation[id] = 3 /* FailedAndReported */;
+                    }
+                    else {
+                        return related === 1 /* Succeeded */ ? -1 /* True */ : 0 /* False */;
+                    }
+                }
+                if (depth > 0) {
+                    for (var i = 0; i < depth; i++) {
+                        // If source and target are already being compared, consider them related with assumptions
+                        if (maybeStack[i][id]) {
+                            return 1 /* Maybe */;
+                        }
+                    }
+                    if (depth === 100) {
+                        overflow = true;
+                        return 0 /* False */;
+                    }
+                }
+                else {
+                    sourceStack = [];
+                    targetStack = [];
+                    maybeStack = [];
+                    expandingFlags = 0;
+                }
+                sourceStack[depth] = source;
+                targetStack[depth] = target;
+                maybeStack[depth] = {};
+                maybeStack[depth][id] = 1 /* Succeeded */;
+                depth++;
+                var saveExpandingFlags = expandingFlags;
+                if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth))
+                    expandingFlags |= 1;
+                if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth))
+                    expandingFlags |= 2;
+                var result;
+                if (expandingFlags === 3) {
+                    result = 1 /* Maybe */;
+                }
+                else {
+                    result = propertiesRelatedTo(source, target, reportErrors);
+                    if (result) {
+                        result &= signaturesRelatedTo(source, target, 0 /* Call */, reportErrors);
+                        if (result) {
+                            result &= signaturesRelatedTo(source, target, 1 /* Construct */, reportErrors);
+                            if (result) {
+                                result &= indexTypesRelatedTo(source, originalSource, target, 0 /* String */, reportErrors);
+                                if (result) {
+                                    result &= indexTypesRelatedTo(source, originalSource, target, 1 /* Number */, reportErrors);
+                                }
+                            }
+                        }
+                    }
+                }
+                expandingFlags = saveExpandingFlags;
+                depth--;
+                if (result) {
+                    var maybeCache = maybeStack[depth];
+                    // If result is definitely true, copy assumptions to global cache, else copy to next level up
+                    var destinationCache = (result === -1 /* True */ || depth === 0) ? relation : maybeStack[depth - 1];
+                    ts.copyMap(maybeCache, destinationCache);
+                }
+                else {
+                    // A false result goes straight into global cache (when something is false under assumptions it
+                    // will also be false without assumptions)
+                    relation[id] = reportErrors ? 3 /* FailedAndReported */ : 2 /* Failed */;
+                }
+                return result;
+            }
+            function propertiesRelatedTo(source, target, reportErrors) {
+                if (relation === identityRelation) {
+                    return propertiesIdenticalTo(source, target);
+                }
+                var result = -1 /* True */;
+                var properties = getPropertiesOfObjectType(target);
+                var requireOptionalProperties = relation === subtypeRelation && !(source.flags & 524288 /* ObjectLiteral */);
+                for (var _i = 0, properties_1 = properties; _i < properties_1.length; _i++) {
+                    var targetProp = properties_1[_i];
+                    var sourceProp = getPropertyOfType(source, targetProp.name);
+                    if (sourceProp !== targetProp) {
+                        if (!sourceProp) {
+                            if (!(targetProp.flags & 536870912 /* Optional */) || requireOptionalProperties) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
+                                }
+                                return 0 /* False */;
+                            }
+                        }
+                        else if (!(targetProp.flags & 134217728 /* Prototype */)) {
+                            var sourcePropFlags = getDeclarationFlagsFromSymbol(sourceProp);
+                            var targetPropFlags = getDeclarationFlagsFromSymbol(targetProp);
+                            if (sourcePropFlags & 8 /* Private */ || targetPropFlags & 8 /* Private */) {
+                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
+                                    if (reportErrors) {
+                                        if (sourcePropFlags & 8 /* Private */ && targetPropFlags & 8 /* Private */) {
+                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
+                                        }
+                                        else {
+                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 /* Private */ ? source : target), typeToString(sourcePropFlags & 8 /* Private */ ? target : source));
+                                        }
+                                    }
+                                    return 0 /* False */;
+                                }
+                            }
+                            else if (targetPropFlags & 16 /* Protected */) {
+                                var sourceDeclaredInClass = sourceProp.parent && sourceProp.parent.flags & 32 /* Class */;
+                                var sourceClass = sourceDeclaredInClass ? getDeclaredTypeOfSymbol(getParentOfSymbol(sourceProp)) : undefined;
+                                var targetClass = getDeclaredTypeOfSymbol(getParentOfSymbol(targetProp));
+                                if (!sourceClass || !hasBaseType(sourceClass, targetClass)) {
+                                    if (reportErrors) {
+                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(sourceClass || source), typeToString(targetClass));
+                                    }
+                                    return 0 /* False */;
+                                }
+                            }
+                            else if (sourcePropFlags & 16 /* Protected */) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0 /* False */;
+                            }
+                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
+                            if (!related) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
+                                }
+                                return 0 /* False */;
+                            }
+                            result &= related;
+                            if (sourceProp.flags & 536870912 /* Optional */ && !(targetProp.flags & 536870912 /* Optional */)) {
+                                // TypeScript 1.0 spec (April 2014): 3.8.3
+                                // S is a subtype of a type T, and T is a supertype of S if ...
+                                // S' and T are object types and, for each member M in T..
+                                // M is a property and S' contains a property N where
+                                // if M is a required property, N is also a required property
+                                // (M - property in T)
+                                // (N - property in S)
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0 /* False */;
+                            }
+                        }
+                    }
+                }
+                return result;
+            }
+            function propertiesIdenticalTo(source, target) {
+                if (!(source.flags & 80896 /* ObjectType */ && target.flags & 80896 /* ObjectType */)) {
+                    return 0 /* False */;
+                }
+                var sourceProperties = getPropertiesOfObjectType(source);
+                var targetProperties = getPropertiesOfObjectType(target);
+                if (sourceProperties.length !== targetProperties.length) {
+                    return 0 /* False */;
+                }
+                var result = -1 /* True */;
+                for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
+                    var sourceProp = sourceProperties_1[_i];
+                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
+                    if (!targetProp) {
+                        return 0 /* False */;
+                    }
+                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function signaturesRelatedTo(source, target, kind, reportErrors) {
+                if (relation === identityRelation) {
+                    return signaturesIdenticalTo(source, target, kind);
+                }
+                if (target === anyFunctionType || source === anyFunctionType) {
+                    return -1 /* True */;
+                }
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (kind === 1 /* Construct */ && sourceSignatures.length && targetSignatures.length) {
+                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
+                        // An abstract constructor type is not assignable to a non-abstract constructor type
+                        // as it would otherwise be possible to new an abstract class. Note that the assignability
+                        // check we perform for an extends clause excludes construct signatures from the target,
+                        // so this check never proceeds.
+                        if (reportErrors) {
+                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
+                        }
+                        return 0 /* False */;
+                    }
+                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
+                        return 0 /* False */;
+                    }
+                }
+                var result = -1 /* True */;
+                var saveErrorInfo = errorInfo;
+                outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
+                    var t = targetSignatures_1[_i];
+                    // Only elaborate errors from the first failure
+                    var shouldElaborateErrors = reportErrors;
+                    for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
+                        var s = sourceSignatures_1[_a];
+                        var related = signatureRelatedTo(s, t, shouldElaborateErrors);
+                        if (related) {
+                            result &= related;
+                            errorInfo = saveErrorInfo;
+                            continue outer;
+                        }
+                        shouldElaborateErrors = false;
+                    }
+                    if (shouldElaborateErrors) {
+                        reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, /*enclosingDeclaration*/ undefined, /*flags*/ undefined, kind));
+                    }
+                    return 0 /* False */;
+                }
+                return result;
+            }
+            /**
+             * See signatureAssignableTo, compareSignaturesIdentical
+             */
+            function signatureRelatedTo(source, target, reportErrors) {
+                return compareSignaturesRelated(source, target, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo);
+            }
+            function signaturesIdenticalTo(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (sourceSignatures.length !== targetSignatures.length) {
+                    return 0 /* False */;
+                }
+                var result = -1 /* True */;
+                for (var i = 0, len = sourceSignatures.length; i < len; i++) {
+                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false, isRelatedTo);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
+                var result = -1 /* True */;
+                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
+                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
+                        if (!related) {
+                            if (reportErrors) {
+                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
+                            }
+                            return 0 /* False */;
+                        }
+                        result &= related;
+                    }
+                }
+                return result;
+            }
+            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
+                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
+                if (!related && reportErrors) {
+                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
+                }
+                return related;
+            }
+            function indexTypesRelatedTo(source, originalSource, target, kind, reportErrors) {
+                if (relation === identityRelation) {
+                    return indexTypesIdenticalTo(source, target, kind);
+                }
+                var targetInfo = getIndexInfoOfType(target, kind);
+                if (!targetInfo || ((targetInfo.type.flags & 1 /* Any */) && !(originalSource.flags & 16777726 /* Primitive */))) {
+                    // Index signature of type any permits assignment from everything but primitives
+                    return -1 /* True */;
+                }
+                var sourceInfo = getIndexInfoOfType(source, kind) ||
+                    kind === 1 /* Number */ && getIndexInfoOfType(source, 0 /* String */);
+                if (sourceInfo) {
+                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
+                }
+                if (isObjectLiteralType(source)) {
+                    var related = -1 /* True */;
+                    if (kind === 0 /* String */) {
+                        var sourceNumberInfo = getIndexInfoOfType(source, 1 /* Number */);
+                        if (sourceNumberInfo) {
+                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
+                        }
+                    }
+                    if (related) {
+                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
+                    }
+                    return related;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
+                }
+                return 0 /* False */;
+            }
+            function indexTypesIdenticalTo(source, target, indexKind) {
+                var targetInfo = getIndexInfoOfType(target, indexKind);
+                var sourceInfo = getIndexInfoOfType(source, indexKind);
+                if (!sourceInfo && !targetInfo) {
+                    return -1 /* True */;
+                }
+                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
+                    return isRelatedTo(sourceInfo.type, targetInfo.type);
+                }
+                return 0 /* False */;
+            }
+            function enumRelatedTo(source, target, reportErrors) {
+                if (source.symbol.name !== target.symbol.name ||
+                    source.symbol.flags & 128 /* ConstEnum */ ||
+                    target.symbol.flags & 128 /* ConstEnum */) {
+                    return 0 /* False */;
+                }
+                var targetEnumType = getTypeOfSymbol(target.symbol);
+                for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
+                    var property = _a[_i];
+                    if (property.flags & 8 /* EnumMember */) {
+                        var targetProperty = getPropertyOfType(targetEnumType, property.name);
+                        if (!targetProperty || !(targetProperty.flags & 8 /* EnumMember */)) {
+                            if (reportErrors) {
+                                reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */));
+                            }
+                            return 0 /* False */;
+                        }
+                    }
+                }
+                return -1 /* True */;
+            }
+            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
+                if (!sourceSignature.declaration || !targetSignature.declaration) {
+                    return true;
+                }
+                var sourceAccessibility = sourceSignature.declaration.flags & (8 /* Private */ | 16 /* Protected */);
+                var targetAccessibility = targetSignature.declaration.flags & (8 /* Private */ | 16 /* Protected */);
+                // A public, protected and private signature is assignable to a private signature.
+                if (targetAccessibility === 8 /* Private */) {
+                    return true;
+                }
+                // A public and protected signature is assignable to a protected signature.
+                if (targetAccessibility === 16 /* Protected */ && sourceAccessibility !== 8 /* Private */) {
+                    return true;
+                }
+                // Only a public signature is assignable to public signature.
+                if (targetAccessibility !== 16 /* Protected */ && !sourceAccessibility) {
+                    return true;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
+                }
+                return false;
+            }
+        }
+        // Return true if the given type is the constructor type for an abstract class
+        function isAbstractConstructorType(type) {
+            if (type.flags & 65536 /* Anonymous */) {
+                var symbol = type.symbol;
+                if (symbol && symbol.flags & 32 /* Class */) {
+                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
+                    if (declaration && declaration.flags & 128 /* Abstract */) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        // Return true if the given type is part of a deeply nested chain of generic instantiations. We consider this to be the case
+        // when structural type comparisons have been started for 10 or more instantiations of the same generic type. It is possible,
+        // though highly unlikely, for this test to be true in a situation where a chain of instantiations is not infinitely expanding.
+        // Effectively, we will generate a false positive when two types are structurally equal to at least 10 levels, but unequal at
+        // some level beyond that.
+        function isDeeplyNestedGeneric(type, stack, depth) {
+            // We track type references (created by createTypeReference) and instantiated types (created by instantiateType)
+            if (type.flags & (4096 /* Reference */ | 131072 /* Instantiated */) && depth >= 5) {
+                var symbol = type.symbol;
+                var count = 0;
+                for (var i = 0; i < depth; i++) {
+                    var t = stack[i];
+                    if (t.flags & (4096 /* Reference */ | 131072 /* Instantiated */) && t.symbol === symbol) {
+                        count++;
+                        if (count >= 5)
+                            return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isPropertyIdenticalTo(sourceProp, targetProp) {
+            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0 /* False */;
+        }
+        function compareProperties(sourceProp, targetProp, compareTypes) {
+            // Two members are considered identical when
+            // - they are public properties with identical names, optionality, and types,
+            // - they are private or protected properties originating in the same declaration and having identical types
+            if (sourceProp === targetProp) {
+                return -1 /* True */;
+            }
+            var sourcePropAccessibility = getDeclarationFlagsFromSymbol(sourceProp) & (8 /* Private */ | 16 /* Protected */);
+            var targetPropAccessibility = getDeclarationFlagsFromSymbol(targetProp) & (8 /* Private */ | 16 /* Protected */);
+            if (sourcePropAccessibility !== targetPropAccessibility) {
+                return 0 /* False */;
+            }
+            if (sourcePropAccessibility) {
+                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
+                    return 0 /* False */;
+                }
+            }
+            else {
+                if ((sourceProp.flags & 536870912 /* Optional */) !== (targetProp.flags & 536870912 /* Optional */)) {
+                    return 0 /* False */;
+                }
+            }
+            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
+                return 0 /* False */;
+            }
+            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+        }
+        function isMatchingSignature(source, target, partialMatch) {
+            // A source signature matches a target signature if the two signatures have the same number of required,
+            // optional, and rest parameters.
+            if (source.parameters.length === target.parameters.length &&
+                source.minArgumentCount === target.minArgumentCount &&
+                source.hasRestParameter === target.hasRestParameter) {
+                return true;
+            }
+            // A source signature partially matches a target signature if the target signature has no fewer required
+            // parameters and no more overall parameters than the source signature (where a signature with a rest
+            // parameter is always considered to have more overall parameters than one without).
+            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (source.hasRestParameter && !target.hasRestParameter ||
+                source.hasRestParameter === target.hasRestParameter && source.parameters.length >= target.parameters.length)) {
+                return true;
+            }
+            return false;
+        }
+        /**
+         * See signatureRelatedTo, compareSignaturesIdentical
+         */
+        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
+            // TODO (drosen): De-duplicate code between related functions.
+            if (source === target) {
+                return -1 /* True */;
+            }
+            if (!(isMatchingSignature(source, target, partialMatch))) {
+                return 0 /* False */;
+            }
+            // Check that the two signatures have the same number of type parameters. We might consider
+            // also checking that any type parameter constraints match, but that would require instantiating
+            // the constraints with a common set of type arguments to get relatable entities in places where
+            // type parameters occur in the constraints. The complexity of doing that doesn't seem worthwhile,
+            // particularly as we're comparing erased versions of the signatures below.
+            if ((source.typeParameters ? source.typeParameters.length : 0) !== (target.typeParameters ? target.typeParameters.length : 0)) {
+                return 0 /* False */;
+            }
+            // Spec 1.0 Section 3.8.3 & 3.8.4:
+            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
+            source = getErasedSignature(source);
+            target = getErasedSignature(target);
+            var result = -1 /* True */;
+            if (!ignoreThisTypes && source.thisType && target.thisType) {
+                var related = compareTypes(source.thisType, target.thisType);
+                if (!related) {
+                    return 0 /* False */;
+                }
+                result &= related;
+            }
+            var targetLen = target.parameters.length;
+            for (var i = 0; i < targetLen; i++) {
+                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
+                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
+                var related = compareTypes(s, t);
+                if (!related) {
+                    return 0 /* False */;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+            }
+            return result;
+        }
+        function isRestParameterIndex(signature, parameterIndex) {
+            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
+        }
+        function isSupertypeOfEach(candidate, types) {
+            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
+                var t = types_5[_i];
+                if (candidate !== t && !isTypeSubtypeOf(t, candidate))
+                    return false;
+            }
+            return true;
+        }
+        function getCombinedFlagsOfTypes(types) {
+            var flags = 0;
+            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
+                var t = types_6[_i];
+                flags |= t.flags;
+            }
+            return flags;
+        }
+        function getCommonSupertype(types) {
+            if (!strictNullChecks) {
+                return ts.forEach(types, function (t) { return isSupertypeOfEach(t, types) ? t : undefined; });
+            }
+            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 96 /* Nullable */); });
+            if (!primaryTypes.length) {
+                return getUnionType(types);
+            }
+            var supertype = ts.forEach(primaryTypes, function (t) { return isSupertypeOfEach(t, primaryTypes) ? t : undefined; });
+            return supertype && addTypeKind(supertype, getCombinedFlagsOfTypes(types) & 96 /* Nullable */);
+        }
+        function reportNoCommonSupertypeError(types, errorLocation, errorMessageChainHead) {
+            // The downfallType/bestSupertypeDownfallType is the first type that caused a particular candidate
+            // to not be the common supertype. So if it weren't for this one downfallType (and possibly others),
+            // the type in question could have been the common supertype.
+            var bestSupertype;
+            var bestSupertypeDownfallType;
+            var bestSupertypeScore = 0;
+            for (var i = 0; i < types.length; i++) {
+                var score = 0;
+                var downfallType = undefined;
+                for (var j = 0; j < types.length; j++) {
+                    if (isTypeSubtypeOf(types[j], types[i])) {
+                        score++;
+                    }
+                    else if (!downfallType) {
+                        downfallType = types[j];
+                    }
+                }
+                ts.Debug.assert(!!downfallType, "If there is no common supertype, each type should have a downfallType");
+                if (score > bestSupertypeScore) {
+                    bestSupertype = types[i];
+                    bestSupertypeDownfallType = downfallType;
+                    bestSupertypeScore = score;
+                }
+                // types.length - 1 is the maximum score, given that getCommonSupertype returned false
+                if (bestSupertypeScore === types.length - 1) {
+                    break;
+                }
+            }
+            // In the following errors, the {1} slot is before the {0} slot because checkTypeSubtypeOf supplies the
+            // subtype as the first argument to the error
+            checkTypeSubtypeOf(bestSupertypeDownfallType, bestSupertype, errorLocation, ts.Diagnostics.Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0, errorMessageChainHead);
+        }
+        function isArrayType(type) {
+            return type.flags & 4096 /* Reference */ && type.target === globalArrayType;
+        }
+        function isArrayLikeType(type) {
+            // A type is array-like if it is a reference to the global Array or global ReadonlyArray type,
+            // or if it is not the undefined or null type and if it is assignable to ReadonlyArray<any>
+            return type.flags & 4096 /* Reference */ && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
+                !(type.flags & 96 /* Nullable */) && isTypeAssignableTo(type, anyReadonlyArrayType);
+        }
+        function isTupleLikeType(type) {
+            return !!getPropertyOfType(type, "0");
+        }
+        function isStringLiteralType(type) {
+            return type.flags & 256 /* StringLiteral */;
+        }
+        /**
+         * Check if a Type was written as a tuple type literal.
+         * Prefer using isTupleLikeType() unless the use of `elementTypes` is required.
+         */
+        function isTupleType(type) {
+            return !!(type.flags & 8192 /* Tuple */);
+        }
+        function getCombinedTypeFlags(type) {
+            return type.flags & 16384 /* Union */ ? getCombinedFlagsOfTypes(type.types) : type.flags;
+        }
+        function addTypeKind(type, kind) {
+            if ((getCombinedTypeFlags(type) & kind) === kind) {
+                return type;
+            }
+            var types = [type];
+            if (kind & 2 /* String */)
+                types.push(stringType);
+            if (kind & 4 /* Number */)
+                types.push(numberType);
+            if (kind & 8 /* Boolean */)
+                types.push(booleanType);
+            if (kind & 16 /* Void */)
+                types.push(voidType);
+            if (kind & 32 /* Undefined */)
+                types.push(undefinedType);
+            if (kind & 64 /* Null */)
+                types.push(nullType);
+            return getUnionType(types);
+        }
+        function getNonNullableType(type) {
+            return strictNullChecks ? getTypeWithFacts(type, 524288 /* NEUndefinedOrNull */) : type;
+        }
+        /**
+         * Return true if type was inferred from an object literal or written as an object type literal
+         * with no call or construct signatures.
+         */
+        function isObjectLiteralType(type) {
+            return type.symbol && (type.symbol.flags & (4096 /* ObjectLiteral */ | 2048 /* TypeLiteral */)) !== 0 &&
+                getSignaturesOfType(type, 0 /* Call */).length === 0 &&
+                getSignaturesOfType(type, 1 /* Construct */).length === 0;
+        }
+        function createTransientSymbol(source, type) {
+            var symbol = createSymbol(source.flags | 67108864 /* Transient */, source.name);
+            symbol.declarations = source.declarations;
+            symbol.parent = source.parent;
+            symbol.type = type;
+            symbol.target = source;
+            if (source.valueDeclaration) {
+                symbol.valueDeclaration = source.valueDeclaration;
+            }
+            return symbol;
+        }
+        function transformTypeOfMembers(type, f) {
+            var members = {};
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var property = _a[_i];
+                var original = getTypeOfSymbol(property);
+                var updated = f(original);
+                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
+            }
+            ;
+            return members;
+        }
+        /**
+         * If the the provided object literal is subject to the excess properties check,
+         * create a new that is exempt. Recursively mark object literal members as exempt.
+         * Leave signatures alone since they are not subject to the check.
+         */
+        function getRegularTypeOfObjectLiteral(type) {
+            if (!(type.flags & 1048576 /* FreshObjectLiteral */)) {
+                return type;
+            }
+            var regularType = type.regularType;
+            if (regularType) {
+                return regularType;
+            }
+            var resolved = type;
+            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
+            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
+            regularNew.flags = resolved.flags & ~1048576 /* FreshObjectLiteral */;
+            type.regularType = regularNew;
+            return regularNew;
+        }
+        function getWidenedTypeOfObjectLiteral(type) {
+            var members = transformTypeOfMembers(type, function (prop) {
+                var widened = getWidenedType(prop);
+                return prop === widened ? prop : widened;
+            });
+            var stringIndexInfo = getIndexInfoOfType(type, 0 /* String */);
+            var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
+            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
+        }
+        function getWidenedConstituentType(type) {
+            return type.flags & 96 /* Nullable */ ? type : getWidenedType(type);
+        }
+        function getWidenedType(type) {
+            if (type.flags & 6291456 /* RequiresWidening */) {
+                if (type.flags & 96 /* Nullable */) {
+                    return anyType;
+                }
+                if (type.flags & 524288 /* ObjectLiteral */) {
+                    return getWidenedTypeOfObjectLiteral(type);
+                }
+                if (type.flags & 16384 /* Union */) {
+                    return getUnionType(ts.map(type.types, getWidenedConstituentType), /*noSubtypeReduction*/ true);
+                }
+                if (isArrayType(type)) {
+                    return createArrayType(getWidenedType(type.typeArguments[0]));
+                }
+                if (isTupleType(type)) {
+                    return createTupleType(ts.map(type.elementTypes, getWidenedType));
+                }
+            }
+            return type;
+        }
+        /**
+         * Reports implicit any errors that occur as a result of widening 'null' and 'undefined'
+         * to 'any'. A call to reportWideningErrorsInType is normally accompanied by a call to
+         * getWidenedType. But in some cases getWidenedType is called without reporting errors
+         * (type argument inference is an example).
+         *
+         * The return value indicates whether an error was in fact reported. The particular circumstances
+         * are on a best effort basis. Currently, if the null or undefined that causes widening is inside
+         * an object literal property (arbitrarily deeply), this function reports an error. If no error is
+         * reported, reportImplicitAnyError is a suitable fallback to report a general error.
+         */
+        function reportWideningErrorsInType(type) {
+            var errorReported = false;
+            if (type.flags & 16384 /* Union */) {
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
+                }
+            }
+            if (isArrayType(type)) {
+                return reportWideningErrorsInType(type.typeArguments[0]);
+            }
+            if (isTupleType(type)) {
+                for (var _b = 0, _c = type.elementTypes; _b < _c.length; _b++) {
+                    var t = _c[_b];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
+                }
+            }
+            if (type.flags & 524288 /* ObjectLiteral */) {
+                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
+                    var p = _e[_d];
+                    var t = getTypeOfSymbol(p);
+                    if (t.flags & 2097152 /* ContainsWideningType */) {
+                        if (!reportWideningErrorsInType(t)) {
+                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
+                        }
+                        errorReported = true;
+                    }
+                }
+            }
+            return errorReported;
+        }
+        function reportImplicitAnyError(declaration, type) {
+            var typeAsString = typeToString(getWidenedType(type));
+            var diagnostic;
+            switch (declaration.kind) {
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
+                    break;
+                case 142 /* Parameter */:
+                    diagnostic = declaration.dotDotDotToken ?
+                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
+                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
+                    break;
+                case 169 /* BindingElement */:
+                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
+                    break;
+                case 220 /* FunctionDeclaration */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    if (!declaration.name) {
+                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
+                        return;
+                    }
+                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
+                    break;
+                default:
+                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
+            }
+            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
+        }
+        function reportErrorsFromWidening(declaration, type) {
+            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & 2097152 /* ContainsWideningType */) {
+                // Report implicit any error within type if possible, otherwise report error on declaration
+                if (!reportWideningErrorsInType(type)) {
+                    reportImplicitAnyError(declaration, type);
+                }
+            }
+        }
+        function forEachMatchingParameterType(source, target, callback) {
+            var sourceMax = source.parameters.length;
+            var targetMax = target.parameters.length;
+            var count;
+            if (source.hasRestParameter && target.hasRestParameter) {
+                count = Math.max(sourceMax, targetMax);
+            }
+            else if (source.hasRestParameter) {
+                count = targetMax;
+            }
+            else if (target.hasRestParameter) {
+                count = sourceMax;
+            }
+            else {
+                count = Math.min(sourceMax, targetMax);
+            }
+            for (var i = 0; i < count; i++) {
+                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
+            }
+        }
+        function createInferenceContext(typeParameters, inferUnionTypes) {
+            var inferences = ts.map(typeParameters, createTypeInferencesObject);
+            return {
+                typeParameters: typeParameters,
+                inferUnionTypes: inferUnionTypes,
+                inferences: inferences,
+                inferredTypes: new Array(typeParameters.length)
+            };
+        }
+        function createTypeInferencesObject() {
+            return {
+                primary: undefined,
+                secondary: undefined,
+                isFixed: false
+            };
+        }
+        function inferTypes(context, source, target) {
+            var sourceStack;
+            var targetStack;
+            var depth = 0;
+            var inferiority = 0;
+            var visited = {};
+            inferFromTypes(source, target);
+            function isInProcess(source, target) {
+                for (var i = 0; i < depth; i++) {
+                    if (source === sourceStack[i] && target === targetStack[i]) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function inferFromTypes(source, target) {
+                if (source.flags & 16384 /* Union */ && target.flags & 16384 /* Union */ ||
+                    source.flags & 32768 /* Intersection */ && target.flags & 32768 /* Intersection */) {
+                    // Source and target are both unions or both intersections. First, find each
+                    // target constituent type that has an identically matching source constituent
+                    // type, and for each such target constituent type infer from the type to itself.
+                    // When inferring from a type to itself we effectively find all type parameter
+                    // occurrences within that type and infer themselves as their type arguments.
+                    var matchingTypes = void 0;
+                    for (var _i = 0, _a = target.types; _i < _a.length; _i++) {
+                        var t = _a[_i];
+                        if (typeIdenticalToSomeType(t, source.types)) {
+                            (matchingTypes || (matchingTypes = [])).push(t);
+                            inferFromTypes(t, t);
+                        }
+                    }
+                    // Next, to improve the quality of inferences, reduce the source and target types by
+                    // removing the identically matched constituents. For example, when inferring from
+                    // 'string | string[]' to 'string | T' we reduce the types to 'string[]' and 'T'.
+                    if (matchingTypes) {
+                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
+                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
+                    }
+                }
+                if (target.flags & 512 /* TypeParameter */) {
+                    // If target is a type parameter, make an inference, unless the source type contains
+                    // the anyFunctionType (the wildcard type that's used to avoid contextually typing functions).
+                    // Because the anyFunctionType is internal, it should not be exposed to the user by adding
+                    // it as an inference candidate. Hopefully, a better candidate will come along that does
+                    // not contain anyFunctionType when we come back to this argument for its second round
+                    // of inference.
+                    if (source.flags & 8388608 /* ContainsAnyFunctionType */) {
+                        return;
+                    }
+                    var typeParameters = context.typeParameters;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (target === typeParameters[i]) {
+                            var inferences = context.inferences[i];
+                            if (!inferences.isFixed) {
+                                // Any inferences that are made to a type parameter in a union type are inferior
+                                // to inferences made to a flat (non-union) type. This is because if we infer to
+                                // T | string[], we really don't know if we should be inferring to T or not (because
+                                // the correct constituent on the target side could be string[]). Therefore, we put
+                                // such inferior inferences into a secondary bucket, and only use them if the primary
+                                // bucket is empty.
+                                var candidates = inferiority ?
+                                    inferences.secondary || (inferences.secondary = []) :
+                                    inferences.primary || (inferences.primary = []);
+                                if (!ts.contains(candidates, source)) {
+                                    candidates.push(source);
+                                }
+                            }
+                            return;
+                        }
+                    }
+                }
+                else if (source.flags & 4096 /* Reference */ && target.flags & 4096 /* Reference */ && source.target === target.target) {
+                    // If source and target are references to the same generic type, infer from type arguments
+                    var sourceTypes = source.typeArguments || emptyArray;
+                    var targetTypes = target.typeArguments || emptyArray;
+                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
+                    for (var i = 0; i < count; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
+                }
+                else if (source.flags & 8192 /* Tuple */ && target.flags & 8192 /* Tuple */ && source.elementTypes.length === target.elementTypes.length) {
+                    // If source and target are tuples of the same size, infer from element types
+                    var sourceTypes = source.elementTypes;
+                    var targetTypes = target.elementTypes;
+                    for (var i = 0; i < sourceTypes.length; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
+                }
+                else if (target.flags & 49152 /* UnionOrIntersection */) {
+                    var targetTypes = target.types;
+                    var typeParameterCount = 0;
+                    var typeParameter = void 0;
+                    // First infer to each type in union or intersection that isn't a type parameter
+                    for (var _b = 0, targetTypes_2 = targetTypes; _b < targetTypes_2.length; _b++) {
+                        var t = targetTypes_2[_b];
+                        if (t.flags & 512 /* TypeParameter */ && ts.contains(context.typeParameters, t)) {
+                            typeParameter = t;
+                            typeParameterCount++;
+                        }
+                        else {
+                            inferFromTypes(source, t);
+                        }
+                    }
+                    // Next, if target containings a single naked type parameter, make a secondary inference to that type
+                    // parameter. This gives meaningful results for union types in co-variant positions and intersection
+                    // types in contra-variant positions (such as callback parameters).
+                    if (typeParameterCount === 1) {
+                        inferiority++;
+                        inferFromTypes(source, typeParameter);
+                        inferiority--;
+                    }
+                }
+                else if (source.flags & 49152 /* UnionOrIntersection */) {
+                    // Source is a union or intersection type, infer from each constituent type
+                    var sourceTypes = source.types;
+                    for (var _c = 0, sourceTypes_3 = sourceTypes; _c < sourceTypes_3.length; _c++) {
+                        var sourceType = sourceTypes_3[_c];
+                        inferFromTypes(sourceType, target);
+                    }
+                }
+                else {
+                    source = getApparentType(source);
+                    if (source.flags & 80896 /* ObjectType */ && (target.flags & 4096 /* Reference */ && target.typeArguments ||
+                        target.flags & 8192 /* Tuple */ ||
+                        target.flags & 65536 /* Anonymous */ && target.symbol && target.symbol.flags & (8192 /* Method */ | 2048 /* TypeLiteral */ | 32 /* Class */))) {
+                        // If source is an object type, and target is a type reference with type arguments, a tuple type,
+                        // the type of a method, or a type literal, infer from members
+                        if (isInProcess(source, target)) {
+                            return;
+                        }
+                        if (isDeeplyNestedGeneric(source, sourceStack, depth) && isDeeplyNestedGeneric(target, targetStack, depth)) {
+                            return;
+                        }
+                        var key = source.id + "," + target.id;
+                        if (ts.hasProperty(visited, key)) {
+                            return;
+                        }
+                        visited[key] = true;
+                        if (depth === 0) {
+                            sourceStack = [];
+                            targetStack = [];
+                        }
+                        sourceStack[depth] = source;
+                        targetStack[depth] = target;
+                        depth++;
+                        inferFromProperties(source, target);
+                        inferFromSignatures(source, target, 0 /* Call */);
+                        inferFromSignatures(source, target, 1 /* Construct */);
+                        inferFromIndexTypes(source, target);
+                        depth--;
+                    }
+                }
+            }
+            function inferFromProperties(source, target) {
+                var properties = getPropertiesOfObjectType(target);
+                for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
+                    var targetProp = properties_2[_i];
+                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
+                    if (sourceProp) {
+                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+                    }
+                }
+            }
+            function inferFromSignatures(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                var sourceLen = sourceSignatures.length;
+                var targetLen = targetSignatures.length;
+                var len = sourceLen < targetLen ? sourceLen : targetLen;
+                for (var i = 0; i < len; i++) {
+                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
+                }
+            }
+            function inferFromSignature(source, target) {
+                forEachMatchingParameterType(source, target, inferFromTypes);
+                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
+                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
+                }
+                else {
+                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+                }
+            }
+            function inferFromIndexTypes(source, target) {
+                var targetStringIndexType = getIndexTypeOfType(target, 0 /* String */);
+                if (targetStringIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 0 /* String */) ||
+                        getImplicitIndexTypeOfType(source, 0 /* String */);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetStringIndexType);
+                    }
+                }
+                var targetNumberIndexType = getIndexTypeOfType(target, 1 /* Number */);
+                if (targetNumberIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 1 /* Number */) ||
+                        getIndexTypeOfType(source, 0 /* String */) ||
+                        getImplicitIndexTypeOfType(source, 1 /* Number */);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetNumberIndexType);
+                    }
+                }
+            }
+        }
+        function typeIdenticalToSomeType(type, types) {
+            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
+                var t = types_7[_i];
+                if (isTypeIdenticalTo(t, type)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        /**
+         * Return a new union or intersection type computed by removing a given set of types
+         * from a given union or intersection type.
+         */
+        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
+            var reducedTypes = [];
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (!typeIdenticalToSomeType(t, typesToRemove)) {
+                    reducedTypes.push(t);
+                }
+            }
+            return type.flags & 16384 /* Union */ ? getUnionType(reducedTypes, /*noSubtypeReduction*/ true) : getIntersectionType(reducedTypes);
+        }
+        function getInferenceCandidates(context, index) {
+            var inferences = context.inferences[index];
+            return inferences.primary || inferences.secondary || emptyArray;
+        }
+        function getInferredType(context, index) {
+            var inferredType = context.inferredTypes[index];
+            var inferenceSucceeded;
+            if (!inferredType) {
+                var inferences = getInferenceCandidates(context, index);
+                if (inferences.length) {
+                    // Infer widened union or supertype, or the unknown type for no common supertype
+                    var unionOrSuperType = context.inferUnionTypes ? getUnionType(inferences) : getCommonSupertype(inferences);
+                    inferredType = unionOrSuperType ? getWidenedType(unionOrSuperType) : unknownType;
+                    inferenceSucceeded = !!unionOrSuperType;
+                }
+                else {
+                    // Infer the empty object type when no inferences were made. It is important to remember that
+                    // in this case, inference still succeeds, meaning there is no error for not having inference
+                    // candidates. An inference error only occurs when there are *conflicting* candidates, i.e.
+                    // candidates with no common supertype.
+                    inferredType = emptyObjectType;
+                    inferenceSucceeded = true;
+                }
+                context.inferredTypes[index] = inferredType;
+                // Only do the constraint check if inference succeeded (to prevent cascading errors)
+                if (inferenceSucceeded) {
+                    var constraint = getConstraintOfTypeParameter(context.typeParameters[index]);
+                    if (constraint) {
+                        var instantiatedConstraint = instantiateType(constraint, getInferenceMapper(context));
+                        if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
+                            context.inferredTypes[index] = inferredType = instantiatedConstraint;
+                        }
+                    }
+                }
+                else if (context.failedTypeParameterIndex === undefined || context.failedTypeParameterIndex > index) {
+                    // If inference failed, it is necessary to record the index of the failed type parameter (the one we are on).
+                    // It might be that inference has already failed on a later type parameter on a previous call to inferTypeArguments.
+                    // So if this failure is on preceding type parameter, this type parameter is the new failure index.
+                    context.failedTypeParameterIndex = index;
+                }
+            }
+            return inferredType;
+        }
+        function getInferredTypes(context) {
+            for (var i = 0; i < context.inferredTypes.length; i++) {
+                getInferredType(context, i);
+            }
+            return context.inferredTypes;
+        }
+        // EXPRESSION TYPE CHECKING
+        function getResolvedSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 /* Value */ | 1048576 /* ExportValue */, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol;
+            }
+            return links.resolvedSymbol;
+        }
+        function isInTypeQuery(node) {
+            // TypeScript 1.0 spec (April 2014): 3.6.3
+            // A type query consists of the keyword typeof followed by an expression.
+            // The expression is restricted to a single identifier or a sequence of identifiers separated by periods
+            while (node) {
+                switch (node.kind) {
+                    case 158 /* TypeQuery */:
+                        return true;
+                    case 69 /* Identifier */:
+                    case 139 /* QualifiedName */:
+                        node = node.parent;
+                        continue;
+                    default:
+                        return false;
+                }
+            }
+            ts.Debug.fail("should not get here");
+        }
+        // Return the flow cache key for a "dotted name" (i.e. a sequence of identifiers
+        // separated by dots). The key consists of the id of the symbol referenced by the
+        // leftmost identifier followed by zero or more property names separated by dots.
+        // The result is undefined if the reference isn't a dotted name.
+        function getFlowCacheKey(node) {
+            if (node.kind === 69 /* Identifier */) {
+                var symbol = getResolvedSymbol(node);
+                return symbol !== unknownSymbol ? "" + getSymbolId(symbol) : undefined;
+            }
+            if (node.kind === 97 /* ThisKeyword */) {
+                return "0";
+            }
+            if (node.kind === 172 /* PropertyAccessExpression */) {
+                var key = getFlowCacheKey(node.expression);
+                return key && key + "." + node.name.text;
+            }
+            return undefined;
+        }
+        function isNullOrUndefinedLiteral(node) {
+            return node.kind === 93 /* NullKeyword */ ||
+                node.kind === 69 /* Identifier */ && getResolvedSymbol(node) === undefinedSymbol;
+        }
+        function getLeftmostIdentifierOrThis(node) {
+            switch (node.kind) {
+                case 69 /* Identifier */:
+                case 97 /* ThisKeyword */:
+                    return node;
+                case 172 /* PropertyAccessExpression */:
+                    return getLeftmostIdentifierOrThis(node.expression);
+            }
+            return undefined;
+        }
+        function isMatchingReference(source, target) {
+            if (source.kind === target.kind) {
+                switch (source.kind) {
+                    case 69 /* Identifier */:
+                        return getResolvedSymbol(source) === getResolvedSymbol(target);
+                    case 97 /* ThisKeyword */:
+                        return true;
+                    case 172 /* PropertyAccessExpression */:
+                        return source.name.text === target.name.text &&
+                            isMatchingReference(source.expression, target.expression);
+                }
+            }
+            return false;
+        }
+        function containsMatchingReference(source, target) {
+            while (source.kind === 172 /* PropertyAccessExpression */) {
+                source = source.expression;
+                if (isMatchingReference(source, target)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function isOrContainsMatchingReference(source, target) {
+            return isMatchingReference(source, target) || containsMatchingReference(source, target);
+        }
+        function hasMatchingArgument(callExpression, reference) {
+            if (callExpression.arguments) {
+                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
+                    var argument = _a[_i];
+                    if (isOrContainsMatchingReference(reference, argument)) {
+                        return true;
+                    }
+                }
+            }
+            if (callExpression.expression.kind === 172 /* PropertyAccessExpression */ &&
+                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
+                return true;
+            }
+            return false;
+        }
+        function getFlowNodeId(flow) {
+            if (!flow.id) {
+                flow.id = nextFlowId;
+                nextFlowId++;
+            }
+            return flow.id;
+        }
+        function typeMaybeAssignableTo(source, target) {
+            if (!(source.flags & 16384 /* Union */)) {
+                return isTypeAssignableTo(source, target);
+            }
+            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (isTypeAssignableTo(t, target)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        // Remove those constituent types of declaredType to which no constituent type of assignedType is assignable.
+        // For example, when a variable of type number | string | boolean is assigned a value of type number | boolean,
+        // we remove type string.
+        function getAssignmentReducedType(declaredType, assignedType) {
+            if (declaredType !== assignedType && declaredType.flags & 16384 /* Union */) {
+                var reducedTypes = ts.filter(declaredType.types, function (t) { return typeMaybeAssignableTo(assignedType, t); });
+                if (reducedTypes.length) {
+                    return reducedTypes.length === 1 ? reducedTypes[0] : getUnionType(reducedTypes);
+                }
+            }
+            return declaredType;
+        }
+        function getTypeFacts(type) {
+            var flags = type.flags;
+            if (flags & 258 /* StringLike */) {
+                return strictNullChecks ? 4079361 /* StringStrictFacts */ : 4194049 /* StringFacts */;
+            }
+            if (flags & 132 /* NumberLike */) {
+                return strictNullChecks ? 4079234 /* NumberStrictFacts */ : 4193922 /* NumberFacts */;
+            }
+            if (flags & 8 /* Boolean */) {
+                return strictNullChecks ? 4078980 /* BooleanStrictFacts */ : 4193668 /* BooleanFacts */;
+            }
+            if (flags & 80896 /* ObjectType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return resolved.callSignatures.length || resolved.constructSignatures.length || isTypeSubtypeOf(type, globalFunctionType) ?
+                    strictNullChecks ? 1970144 /* FunctionStrictFacts */ : 4181984 /* FunctionFacts */ :
+                    strictNullChecks ? 1972176 /* ObjectStrictFacts */ : 4184016 /* ObjectFacts */;
+            }
+            if (flags & (16 /* Void */ | 32 /* Undefined */)) {
+                return 2457472 /* UndefinedFacts */;
+            }
+            if (flags & 64 /* Null */) {
+                return 2340752 /* NullFacts */;
+            }
+            if (flags & 16777216 /* ESSymbol */) {
+                return strictNullChecks ? 1981320 /* SymbolStrictFacts */ : 4193160 /* SymbolFacts */;
+            }
+            if (flags & 512 /* TypeParameter */) {
+                var constraint = getConstraintOfTypeParameter(type);
+                return constraint ? getTypeFacts(constraint) : 4194303 /* All */;
+            }
+            if (flags & 32768 /* Intersection */) {
+                return ts.reduceLeft(type.types, function (flags, type) { return flags |= getTypeFacts(type); }, 0 /* None */);
+            }
+            return 4194303 /* All */;
+        }
+        function getTypeWithFacts(type, include) {
+            if (!(type.flags & 16384 /* Union */)) {
+                return getTypeFacts(type) & include ? type : neverType;
+            }
+            var firstType;
+            var types;
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (getTypeFacts(t) & include) {
+                    if (!firstType) {
+                        firstType = t;
+                    }
+                    else {
+                        if (!types) {
+                            types = [firstType];
+                        }
+                        types.push(t);
+                    }
+                }
+            }
+            return firstType ? types ? getUnionType(types, /*noSubtypeReduction*/ true) : firstType : neverType;
+        }
+        function getTypeWithDefault(type, defaultExpression) {
+            if (defaultExpression) {
+                var defaultType = checkExpression(defaultExpression);
+                return getUnionType([getTypeWithFacts(type, 131072 /* NEUndefined */), defaultType]);
+            }
+            return type;
+        }
+        function getTypeOfDestructuredProperty(type, name) {
+            var text = getTextOfPropertyName(name);
+            return getTypeOfPropertyOfType(type, text) ||
+                isNumericLiteralName(text) && getIndexTypeOfType(type, 1 /* Number */) ||
+                getIndexTypeOfType(type, 0 /* String */) ||
+                unknownType;
+        }
+        function getTypeOfDestructuredArrayElement(type, index) {
+            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
+                checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) ||
+                unknownType;
+        }
+        function getTypeOfDestructuredSpreadElement(type) {
+            return createArrayType(checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) || unknownType);
+        }
+        function getAssignedTypeOfBinaryExpression(node) {
+            return node.parent.kind === 170 /* ArrayLiteralExpression */ || node.parent.kind === 253 /* PropertyAssignment */ ?
+                getTypeWithDefault(getAssignedType(node), node.right) :
+                checkExpression(node.right);
+        }
+        function getAssignedTypeOfArrayLiteralElement(node, element) {
+            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
+        }
+        function getAssignedTypeOfSpreadElement(node) {
+            return getTypeOfDestructuredSpreadElement(getAssignedType(node.parent));
+        }
+        function getAssignedTypeOfPropertyAssignment(node) {
+            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
+        }
+        function getAssignedTypeOfShorthandPropertyAssignment(node) {
+            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
+        }
+        function getAssignedType(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 207 /* ForInStatement */:
+                    return stringType;
+                case 208 /* ForOfStatement */:
+                    return checkRightHandSideOfForOf(parent.expression) || unknownType;
+                case 187 /* BinaryExpression */:
+                    return getAssignedTypeOfBinaryExpression(parent);
+                case 181 /* DeleteExpression */:
+                    return undefinedType;
+                case 170 /* ArrayLiteralExpression */:
+                    return getAssignedTypeOfArrayLiteralElement(parent, node);
+                case 191 /* SpreadElementExpression */:
+                    return getAssignedTypeOfSpreadElement(parent);
+                case 253 /* PropertyAssignment */:
+                    return getAssignedTypeOfPropertyAssignment(parent);
+                case 254 /* ShorthandPropertyAssignment */:
+                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
+            }
+            return unknownType;
+        }
+        function getInitialTypeOfBindingElement(node) {
+            var pattern = node.parent;
+            var parentType = getInitialType(pattern.parent);
+            var type = pattern.kind === 167 /* ObjectBindingPattern */ ?
+                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
+                !node.dotDotDotToken ?
+                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
+                    getTypeOfDestructuredSpreadElement(parentType);
+            return getTypeWithDefault(type, node.initializer);
+        }
+        function getTypeOfInitializer(node) {
+            // Return the cached type if one is available. If the type of the variable was inferred
+            // from its initializer, we'll already have cached the type. Otherwise we compute it now
+            // without caching such that transient types are reflected.
+            var links = getNodeLinks(node);
+            return links.resolvedType || checkExpression(node);
+        }
+        function getInitialTypeOfVariableDeclaration(node) {
+            if (node.initializer) {
+                return getTypeOfInitializer(node.initializer);
+            }
+            if (node.parent.parent.kind === 207 /* ForInStatement */) {
+                return stringType;
+            }
+            if (node.parent.parent.kind === 208 /* ForOfStatement */) {
+                return checkRightHandSideOfForOf(node.parent.parent.expression) || unknownType;
+            }
+            return unknownType;
+        }
+        function getInitialType(node) {
+            return node.kind === 218 /* VariableDeclaration */ ?
+                getInitialTypeOfVariableDeclaration(node) :
+                getInitialTypeOfBindingElement(node);
+        }
+        function getReferenceFromExpression(node) {
+            switch (node.kind) {
+                case 178 /* ParenthesizedExpression */:
+                    return getReferenceFromExpression(node.expression);
+                case 187 /* BinaryExpression */:
+                    switch (node.operatorToken.kind) {
+                        case 56 /* EqualsToken */:
+                            return getReferenceFromExpression(node.left);
+                        case 24 /* CommaToken */:
+                            return getReferenceFromExpression(node.right);
+                    }
+            }
+            return node;
+        }
+        function getFlowTypeOfReference(reference, declaredType, assumeInitialized, includeOuterFunctions) {
+            var key;
+            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & 16908175 /* Narrowable */)) {
+                return declaredType;
+            }
+            var initialType = assumeInitialized ? declaredType : addTypeKind(declaredType, 32 /* Undefined */);
+            var visitedFlowStart = visitedFlowCount;
+            var result = getTypeAtFlowNode(reference.flowNode);
+            visitedFlowCount = visitedFlowStart;
+            if (reference.parent.kind === 196 /* NonNullExpression */ && getTypeWithFacts(result, 524288 /* NEUndefinedOrNull */) === neverType) {
+                return declaredType;
+            }
+            return result;
+            function getTypeAtFlowNode(flow) {
+                while (true) {
+                    if (flow.flags & 256 /* Shared */) {
+                        // We cache results of flow type resolution for shared nodes that were previously visited in
+                        // the same getFlowTypeOfReference invocation. A node is considered shared when it is the
+                        // antecedent of more than one node.
+                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
+                            if (visitedFlowNodes[i] === flow) {
+                                return visitedFlowTypes[i];
+                            }
+                        }
+                    }
+                    var type = void 0;
+                    if (flow.flags & 16 /* Assignment */) {
+                        type = getTypeAtFlowAssignment(flow);
+                        if (!type) {
+                            flow = flow.antecedent;
+                            continue;
+                        }
+                    }
+                    else if (flow.flags & 96 /* Condition */) {
+                        type = getTypeAtFlowCondition(flow);
+                    }
+                    else if (flow.flags & 12 /* Label */) {
+                        if (flow.antecedents.length === 1) {
+                            flow = flow.antecedents[0];
+                            continue;
+                        }
+                        type = flow.flags & 4 /* BranchLabel */ ?
+                            getTypeAtFlowBranchLabel(flow) :
+                            getTypeAtFlowLoopLabel(flow);
+                    }
+                    else if (flow.flags & 2 /* Start */) {
+                        // Check if we should continue with the control flow of the containing function.
+                        var container = flow.container;
+                        if (container && includeOuterFunctions) {
+                            flow = container.flowNode;
+                            continue;
+                        }
+                        // At the top of the flow we have the initial type.
+                        type = initialType;
+                    }
+                    else {
+                        // Unreachable code errors are reported in the binding phase. Here we
+                        // simply return the declared type to reduce follow-on errors.
+                        type = declaredType;
+                    }
+                    if (flow.flags & 256 /* Shared */) {
+                        // Record visited node and the associated type in the cache.
+                        visitedFlowNodes[visitedFlowCount] = flow;
+                        visitedFlowTypes[visitedFlowCount] = type;
+                        visitedFlowCount++;
+                    }
+                    return type;
+                }
+            }
+            function getTypeAtFlowAssignment(flow) {
+                var node = flow.node;
+                // Assignments only narrow the computed type if the declared type is a union type. Thus, we
+                // only need to evaluate the assigned type if the declared type is a union type.
+                if ((node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) &&
+                    reference.kind === 69 /* Identifier */ &&
+                    getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(reference)) === getSymbolOfNode(node)) {
+                    return declaredType.flags & 16384 /* Union */ ?
+                        getAssignmentReducedType(declaredType, getInitialType(node)) :
+                        declaredType;
+                }
+                // If the node is not a variable declaration or binding element, it is an identifier
+                // or a dotted name that is the target of an assignment. If we have a match, reduce
+                // the declared type by the assigned type.
+                if (isMatchingReference(reference, node)) {
+                    return declaredType.flags & 16384 /* Union */ ?
+                        getAssignmentReducedType(declaredType, getAssignedType(node)) :
+                        declaredType;
+                }
+                // We didn't have a direct match. However, if the reference is a dotted name, this
+                // may be an assignment to a left hand part of the reference. For example, for a
+                // reference 'x.y.z', we may be at an assignment to 'x.y' or 'x'. In that case,
+                // return the declared type.
+                if (containsMatchingReference(reference, node)) {
+                    return declaredType;
+                }
+                // Assignment doesn't affect reference
+                return undefined;
+            }
+            function getTypeAtFlowCondition(flow) {
+                var type = getTypeAtFlowNode(flow.antecedent);
+                if (type !== neverType) {
+                    // If we have an antecedent type (meaning we're reachable in some way), we first
+                    // attempt to narrow the antecedent type. If that produces the nothing type, then
+                    // we take the type guard as an indication that control could reach here in a
+                    // manner not understood by the control flow analyzer (e.g. a function argument
+                    // has an invalid type, or a nested function has possibly made an assignment to a
+                    // captured variable). We proceed by reverting to the declared type and then
+                    // narrow that.
+                    var assumeTrue = (flow.flags & 32 /* TrueCondition */) !== 0;
+                    type = narrowType(type, flow.expression, assumeTrue);
+                    if (type === neverType) {
+                        type = narrowType(declaredType, flow.expression, assumeTrue);
+                    }
+                }
+                return type;
+            }
+            function getTypeAtFlowBranchLabel(flow) {
+                var antecedentTypes = [];
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    var type = getTypeAtFlowNode(antecedent);
+                    // If the type at a particular antecedent path is the declared type and the
+                    // reference is known to always be assigned (i.e. when declared and initial types
+                    // are the same), there is no reason to process more antecedents since the only
+                    // possible outcome is subtypes that will be removed in the final union type anyway.
+                    if (type === declaredType && declaredType === initialType) {
+                        return type;
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                }
+                return getUnionType(antecedentTypes);
+            }
+            function getTypeAtFlowLoopLabel(flow) {
+                // If we have previously computed the control flow type for the reference at
+                // this flow loop junction, return the cached type.
+                var id = getFlowNodeId(flow);
+                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = {});
+                if (!key) {
+                    key = getFlowCacheKey(reference);
+                }
+                if (cache[key]) {
+                    return cache[key];
+                }
+                // If this flow loop junction and reference are already being processed, return
+                // the union of the types computed for each branch so far. We should never see
+                // an empty array here because the first antecedent of a loop junction is always
+                // the non-looping control flow path that leads to the top.
+                for (var i = flowLoopStart; i < flowLoopCount; i++) {
+                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key) {
+                        return getUnionType(flowLoopTypes[i]);
+                    }
+                }
+                // Add the flow loop junction and reference to the in-process stack and analyze
+                // each antecedent code path.
+                var antecedentTypes = [];
+                flowLoopNodes[flowLoopCount] = flow;
+                flowLoopKeys[flowLoopCount] = key;
+                flowLoopTypes[flowLoopCount] = antecedentTypes;
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    flowLoopCount++;
+                    var type = getTypeAtFlowNode(antecedent);
+                    flowLoopCount--;
+                    // If we see a value appear in the cache it is a sign that control flow  analysis
+                    // was restarted and completed by checkExpressionCached. We can simply pick up
+                    // the resulting type and bail out.
+                    if (cache[key]) {
+                        return cache[key];
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                    // If the type at a particular antecedent path is the declared type there is no
+                    // reason to process more antecedents since the only possible outcome is subtypes
+                    // that will be removed in the final union type anyway.
+                    if (type === declaredType) {
+                        break;
+                    }
+                }
+                return cache[key] = getUnionType(antecedentTypes);
+            }
+            function narrowTypeByTruthiness(type, expr, assumeTrue) {
+                return isMatchingReference(reference, expr) ? getTypeWithFacts(type, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */) : type;
+            }
+            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
+                switch (expr.operatorToken.kind) {
+                    case 56 /* EqualsToken */:
+                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
+                    case 30 /* EqualsEqualsToken */:
+                    case 31 /* ExclamationEqualsToken */:
+                    case 32 /* EqualsEqualsEqualsToken */:
+                    case 33 /* ExclamationEqualsEqualsToken */:
+                        if (isNullOrUndefinedLiteral(expr.right)) {
+                            return narrowTypeByNullCheck(type, expr, assumeTrue);
+                        }
+                        if (expr.left.kind === 182 /* TypeOfExpression */ && expr.right.kind === 9 /* StringLiteral */) {
+                            return narrowTypeByTypeof(type, expr, assumeTrue);
+                        }
+                        break;
+                    case 91 /* InstanceOfKeyword */:
+                        return narrowTypeByInstanceof(type, expr, assumeTrue);
+                    case 24 /* CommaToken */:
+                        return narrowType(type, expr.right, assumeTrue);
+                }
+                return type;
+            }
+            function narrowTypeByNullCheck(type, expr, assumeTrue) {
+                // We have '==', '!=', '===', or '!==' operator with 'null' or 'undefined' on the right
+                var operator = expr.operatorToken.kind;
+                if (operator === 31 /* ExclamationEqualsToken */ || operator === 33 /* ExclamationEqualsEqualsToken */) {
+                    assumeTrue = !assumeTrue;
+                }
+                if (!strictNullChecks || !isMatchingReference(reference, getReferenceFromExpression(expr.left))) {
+                    return type;
+                }
+                var doubleEquals = operator === 30 /* EqualsEqualsToken */ || operator === 31 /* ExclamationEqualsToken */;
+                var facts = doubleEquals ?
+                    assumeTrue ? 65536 /* EQUndefinedOrNull */ : 524288 /* NEUndefinedOrNull */ :
+                    expr.right.kind === 93 /* NullKeyword */ ?
+                        assumeTrue ? 32768 /* EQNull */ : 262144 /* NENull */ :
+                        assumeTrue ? 16384 /* EQUndefined */ : 131072 /* NEUndefined */;
+                return getTypeWithFacts(type, facts);
+            }
+            function narrowTypeByTypeof(type, expr, assumeTrue) {
+                // We have '==', '!=', '====', or !==' operator with 'typeof xxx' on the left
+                // and string literal on the right
+                var left = getReferenceFromExpression(expr.left.expression);
+                var right = expr.right;
+                if (!isMatchingReference(reference, left)) {
+                    // For a reference of the form 'x.y', a 'typeof x === ...' type guard resets the
+                    // narrowed type of 'y' to its declared type.
+                    if (containsMatchingReference(reference, left)) {
+                        return declaredType;
+                    }
+                    return type;
+                }
+                if (expr.operatorToken.kind === 31 /* ExclamationEqualsToken */ ||
+                    expr.operatorToken.kind === 33 /* ExclamationEqualsEqualsToken */) {
+                    assumeTrue = !assumeTrue;
+                }
+                if (assumeTrue && !(type.flags & 16384 /* Union */)) {
+                    // We narrow a non-union type to an exact primitive type if the non-union type
+                    // is a supertype of that primtive type. For example, type 'any' can be narrowed
+                    // to one of the primitive types.
+                    var targetType = ts.getProperty(typeofTypesByName, right.text);
+                    if (targetType && isTypeSubtypeOf(targetType, type)) {
+                        return targetType;
+                    }
+                }
+                var facts = assumeTrue ?
+                    ts.getProperty(typeofEQFacts, right.text) || 64 /* TypeofEQHostObject */ :
+                    ts.getProperty(typeofNEFacts, right.text) || 8192 /* TypeofNEHostObject */;
+                return getTypeWithFacts(type, facts);
+            }
+            function narrowTypeByInstanceof(type, expr, assumeTrue) {
+                var left = getReferenceFromExpression(expr.left);
+                if (!isMatchingReference(reference, left)) {
+                    // For a reference of the form 'x.y', an 'x instanceof T' type guard resets the
+                    // narrowed type of 'y' to its declared type.
+                    if (containsMatchingReference(reference, left)) {
+                        return declaredType;
+                    }
+                    return type;
+                }
+                // We never narrow type any in an instanceof guard
+                if (isTypeAny(type)) {
+                    return type;
+                }
+                // Check that right operand is a function type with a prototype property
+                var rightType = checkExpression(expr.right);
+                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
+                    return type;
+                }
+                var targetType;
+                var prototypeProperty = getPropertyOfType(rightType, "prototype");
+                if (prototypeProperty) {
+                    // Target type is type of the prototype property
+                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
+                    if (!isTypeAny(prototypePropertyType)) {
+                        targetType = prototypePropertyType;
+                    }
+                }
+                if (!targetType) {
+                    // Target type is type of construct signature
+                    var constructSignatures = void 0;
+                    if (rightType.flags & 2048 /* Interface */) {
+                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
+                    }
+                    else if (rightType.flags & 65536 /* Anonymous */) {
+                        constructSignatures = getSignaturesOfType(rightType, 1 /* Construct */);
+                    }
+                    if (constructSignatures && constructSignatures.length) {
+                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
+                    }
+                }
+                if (targetType) {
+                    return getNarrowedType(type, targetType, assumeTrue);
+                }
+                return type;
+            }
+            function getNarrowedType(type, candidate, assumeTrue) {
+                if (!assumeTrue) {
+                    return type.flags & 16384 /* Union */ ?
+                        getUnionType(ts.filter(type.types, function (t) { return !isTypeSubtypeOf(t, candidate); })) :
+                        type;
+                }
+                // If the current type is a union type, remove all constituents that aren't assignable to
+                // the candidate type. If one or more constituents remain, return a union of those.
+                if (type.flags & 16384 /* Union */) {
+                    var assignableConstituents = ts.filter(type.types, function (t) { return isTypeAssignableTo(t, candidate); });
+                    if (assignableConstituents.length) {
+                        return getUnionType(assignableConstituents);
+                    }
+                }
+                // If the candidate type is assignable to the target type, narrow to the candidate type.
+                // Otherwise, if the current type is assignable to the candidate, keep the current type.
+                // Otherwise, the types are completely unrelated, so narrow to the empty type.
+                var targetType = type.flags & 512 /* TypeParameter */ ? getApparentType(type) : type;
+                return isTypeAssignableTo(candidate, targetType) ? candidate :
+                    isTypeAssignableTo(type, candidate) ? type :
+                        getIntersectionType([type, candidate]);
+            }
+            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
+                if (type.flags & 1 /* Any */ || !hasMatchingArgument(callExpression, reference)) {
+                    return type;
+                }
+                var signature = getResolvedSignature(callExpression);
+                var predicate = signature.typePredicate;
+                if (!predicate) {
+                    return type;
+                }
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    var predicateArgument = callExpression.arguments[predicate.parameterIndex];
+                    if (predicateArgument) {
+                        if (isMatchingReference(reference, predicateArgument)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue);
+                        }
+                        if (containsMatchingReference(reference, predicateArgument)) {
+                            return declaredType;
+                        }
+                    }
+                }
+                else {
+                    var invokedExpression = skipParenthesizedNodes(callExpression.expression);
+                    if (invokedExpression.kind === 173 /* ElementAccessExpression */ || invokedExpression.kind === 172 /* PropertyAccessExpression */) {
+                        var accessExpression = invokedExpression;
+                        var possibleReference = skipParenthesizedNodes(accessExpression.expression);
+                        if (isMatchingReference(reference, possibleReference)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue);
+                        }
+                        if (containsMatchingReference(reference, possibleReference)) {
+                            return declaredType;
+                        }
+                    }
+                }
+                return type;
+            }
+            // Narrow the given type based on the given expression having the assumed boolean value. The returned type
+            // will be a subtype or the same type as the argument.
+            function narrowType(type, expr, assumeTrue) {
+                switch (expr.kind) {
+                    case 69 /* Identifier */:
+                    case 97 /* ThisKeyword */:
+                    case 172 /* PropertyAccessExpression */:
+                        return narrowTypeByTruthiness(type, expr, assumeTrue);
+                    case 174 /* CallExpression */:
+                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
+                    case 178 /* ParenthesizedExpression */:
+                        return narrowType(type, expr.expression, assumeTrue);
+                    case 187 /* BinaryExpression */:
+                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
+                    case 185 /* PrefixUnaryExpression */:
+                        if (expr.operator === 49 /* ExclamationToken */) {
+                            return narrowType(type, expr.operand, !assumeTrue);
+                        }
+                        break;
+                }
+                return type;
+            }
+        }
+        function getTypeOfSymbolAtLocation(symbol, location) {
+            // If we have an identifier or a property access at the given location, if the location is
+            // an dotted name expression, and if the location is not an assignment target, obtain the type
+            // of the expression (which will reflect control flow analysis). If the expression indeed
+            // resolved to the given symbol, return the narrowed type.
+            if (location.kind === 69 /* Identifier */) {
+                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
+                    location = location.parent;
+                }
+                if (ts.isExpression(location) && !ts.isAssignmentTarget(location)) {
+                    var type = checkExpression(location);
+                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
+                        return type;
+                    }
+                }
+            }
+            // The location isn't a reference to the given symbol, meaning we're being asked
+            // a hypothetical question of what type the symbol would have if there was a reference
+            // to it at the given location. Since we have no control flow information for the
+            // hypotherical reference (control flow information is created and attached by the
+            // binder), we simply return the declared type of the symbol.
+            return getTypeOfSymbol(symbol);
+        }
+        function skipParenthesizedNodes(expression) {
+            while (expression.kind === 178 /* ParenthesizedExpression */) {
+                expression = expression.expression;
+            }
+            return expression;
+        }
+        function getControlFlowContainer(node) {
+            while (true) {
+                node = node.parent;
+                if (ts.isFunctionLike(node) || node.kind === 226 /* ModuleBlock */ || node.kind === 256 /* SourceFile */ || node.kind === 145 /* PropertyDeclaration */) {
+                    return node;
+                }
+            }
+        }
+        function isDeclarationIncludedInFlow(reference, declaration, includeOuterFunctions) {
+            var declarationContainer = getControlFlowContainer(declaration);
+            var container = getControlFlowContainer(reference);
+            while (container !== declarationContainer &&
+                (container.kind === 179 /* FunctionExpression */ || container.kind === 180 /* ArrowFunction */) &&
+                (includeOuterFunctions || ts.getImmediatelyInvokedFunctionExpression(container))) {
+                container = getControlFlowContainer(container);
+            }
+            return container === declarationContainer;
+        }
+        function checkIdentifier(node) {
+            var symbol = getResolvedSymbol(node);
+            // As noted in ECMAScript 6 language spec, arrow functions never have an arguments objects.
+            // Although in down-level emit of arrow function, we emit it using function expression which means that
+            // arguments objects will be bound to the inner object; emitting arrow function natively in ES6, arguments objects
+            // will be bound to non-arrow function that contain this arrow function. This results in inconsistent behavior.
+            // To avoid that we will give an error to users if they use arguments objects in arrow function so that they
+            // can explicitly bound arguments objects
+            if (symbol === argumentsSymbol) {
+                var container = ts.getContainingFunction(node);
+                if (container.kind === 180 /* ArrowFunction */) {
+                    if (languageVersion < 2 /* ES6 */) {
+                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
+                    }
+                }
+                if (node.flags & 33554432 /* AwaitContext */) {
+                    getNodeLinks(container).flags |= 8192 /* CaptureArguments */;
+                }
+            }
+            if (symbol.flags & 8388608 /* Alias */ && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
+                markAliasSymbolAsReferenced(symbol);
+            }
+            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
+            // Due to the emit for class decorators, any reference to the class from inside of the class body
+            // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
+            // behavior of class names in ES6.
+            if (languageVersion === 2 /* ES6 */
+                && localOrExportSymbol.flags & 32 /* Class */
+                && localOrExportSymbol.valueDeclaration.kind === 221 /* ClassDeclaration */
+                && ts.nodeIsDecorated(localOrExportSymbol.valueDeclaration)) {
+                var container = ts.getContainingClass(node);
+                while (container !== undefined) {
+                    if (container === localOrExportSymbol.valueDeclaration && container.name !== node) {
+                        getNodeLinks(container).flags |= 524288 /* ClassWithBodyScopedClassBinding */;
+                        getNodeLinks(node).flags |= 1048576 /* BodyScopedClassBinding */;
+                        break;
+                    }
+                    container = ts.getContainingClass(container);
+                }
+            }
+            checkCollisionWithCapturedSuperVariable(node, node);
+            checkCollisionWithCapturedThisVariable(node, node);
+            checkNestedBlockScopedBinding(node, symbol);
+            var type = getTypeOfSymbol(localOrExportSymbol);
+            if (!(localOrExportSymbol.flags & 3 /* Variable */) || ts.isAssignmentTarget(node)) {
+                return type;
+            }
+            var declaration = localOrExportSymbol.valueDeclaration;
+            var includeOuterFunctions = isReadonlySymbol(localOrExportSymbol);
+            var assumeInitialized = !strictNullChecks || (type.flags & 1 /* Any */) !== 0 || !declaration ||
+                ts.getRootDeclaration(declaration).kind === 142 /* Parameter */ || ts.isInAmbientContext(declaration) ||
+                !isDeclarationIncludedInFlow(node, declaration, includeOuterFunctions);
+            var flowType = getFlowTypeOfReference(node, type, assumeInitialized, includeOuterFunctions);
+            if (!assumeInitialized && !(getCombinedTypeFlags(type) & 32 /* Undefined */) && getCombinedTypeFlags(flowType) & 32 /* Undefined */) {
+                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
+                // Return the declared type to reduce follow-on errors
+                return type;
+            }
+            return flowType;
+        }
+        function isInsideFunction(node, threshold) {
+            var current = node;
+            while (current && current !== threshold) {
+                if (ts.isFunctionLike(current)) {
+                    return true;
+                }
+                current = current.parent;
+            }
+            return false;
+        }
+        function checkNestedBlockScopedBinding(node, symbol) {
+            if (languageVersion >= 2 /* ES6 */ ||
+                (symbol.flags & (2 /* BlockScopedVariable */ | 32 /* Class */)) === 0 ||
+                symbol.valueDeclaration.parent.kind === 252 /* CatchClause */) {
+                return;
+            }
+            // 1. walk from the use site up to the declaration and check
+            // if there is anything function like between declaration and use-site (is binding/class is captured in function).
+            // 2. walk from the declaration up to the boundary of lexical environment and check
+            // if there is an iteration statement in between declaration and boundary (is binding/class declared inside iteration statement)
+            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+            var usedInFunction = isInsideFunction(node.parent, container);
+            var current = container;
+            var containedInIterationStatement = false;
+            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
+                if (ts.isIterationStatement(current, /*lookInLabeledStatements*/ false)) {
+                    containedInIterationStatement = true;
+                    break;
+                }
+                current = current.parent;
+            }
+            if (containedInIterationStatement) {
+                if (usedInFunction) {
+                    // mark iteration statement as containing block-scoped binding captured in some function
+                    getNodeLinks(current).flags |= 65536 /* LoopWithCapturedBlockScopedBinding */;
+                }
+                // mark variables that are declared in loop initializer and reassigned inside the body of ForStatement.
+                // if body of ForStatement will be converted to function then we'll need a extra machinery to propagate reassigned values back.
+                if (container.kind === 206 /* ForStatement */ &&
+                    ts.getAncestor(symbol.valueDeclaration, 219 /* VariableDeclarationList */).parent === container &&
+                    isAssignedInBodyOfForStatement(node, container)) {
+                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152 /* NeedsLoopOutParameter */;
+                }
+                // set 'declared inside loop' bit on the block-scoped binding
+                getNodeLinks(symbol.valueDeclaration).flags |= 262144 /* BlockScopedBindingInLoop */;
+            }
+            if (usedInFunction) {
+                getNodeLinks(symbol.valueDeclaration).flags |= 131072 /* CapturedBlockScopedBinding */;
+            }
+        }
+        function isAssignedInBodyOfForStatement(node, container) {
+            var current = node;
+            // skip parenthesized nodes
+            while (current.parent.kind === 178 /* ParenthesizedExpression */) {
+                current = current.parent;
+            }
+            // check if node is used as LHS in some assignment expression
+            var isAssigned = false;
+            if (ts.isAssignmentTarget(current)) {
+                isAssigned = true;
+            }
+            else if ((current.parent.kind === 185 /* PrefixUnaryExpression */ || current.parent.kind === 186 /* PostfixUnaryExpression */)) {
+                var expr = current.parent;
+                isAssigned = expr.operator === 41 /* PlusPlusToken */ || expr.operator === 42 /* MinusMinusToken */;
+            }
+            if (!isAssigned) {
+                return false;
+            }
+            // at this point we know that node is the target of assignment
+            // now check that modification happens inside the statement part of the ForStatement
+            while (current !== container) {
+                if (current === container.statement) {
+                    return true;
+                }
+                else {
+                    current = current.parent;
+                }
+            }
+            return false;
+        }
+        function captureLexicalThis(node, container) {
+            getNodeLinks(node).flags |= 2 /* LexicalThis */;
+            if (container.kind === 145 /* PropertyDeclaration */ || container.kind === 148 /* Constructor */) {
+                var classNode = container.parent;
+                getNodeLinks(classNode).flags |= 4 /* CaptureThis */;
+            }
+            else {
+                getNodeLinks(container).flags |= 4 /* CaptureThis */;
+            }
+        }
+        function findFirstSuperCall(n) {
+            if (ts.isSuperCallExpression(n)) {
+                return n;
+            }
+            else if (ts.isFunctionLike(n)) {
+                return undefined;
+            }
+            return ts.forEachChild(n, findFirstSuperCall);
+        }
+        /**
+         * Return a cached result if super-statement is already found.
+         * Otherwise, find a super statement in a given constructor function and cache the result in the node-links of the constructor
+         *
+         * @param constructor constructor-function to look for super statement
+         */
+        function getSuperCallInConstructor(constructor) {
+            var links = getNodeLinks(constructor);
+            // Only trying to find super-call if we haven't yet tried to find one.  Once we try, we will record the result
+            if (links.hasSuperCall === undefined) {
+                links.superCall = findFirstSuperCall(constructor.body);
+                links.hasSuperCall = links.superCall ? true : false;
+            }
+            return links.superCall;
+        }
+        /**
+         * Check if the given class-declaration extends null then return true.
+         * Otherwise, return false
+         * @param classDecl a class declaration to check if it extends null
+         */
+        function classDeclarationExtendsNull(classDecl) {
+            var classSymbol = getSymbolOfNode(classDecl);
+            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
+            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
+            return baseConstructorType === nullWideningType;
+        }
+        function checkThisExpression(node) {
+            // Stop at the first arrow function so that we can
+            // tell whether 'this' needs to be captured.
+            var container = ts.getThisContainer(node, /* includeArrowFunctions */ true);
+            var needToCaptureLexicalThis = false;
+            if (container.kind === 148 /* Constructor */) {
+                var containingClassDecl = container.parent;
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
+                // If a containing class does not have extends clause or the class extends null
+                // skip checking whether super statement is called before "this" accessing.
+                if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
+                    var superCall = getSuperCallInConstructor(container);
+                    // We should give an error in the following cases:
+                    //      - No super-call
+                    //      - "this" is accessing before super-call.
+                    //          i.e super(this)
+                    //              this.x; super();
+                    // We want to make sure that super-call is done before accessing "this" so that
+                    // "this" is not accessed as a parameter of the super-call.
+                    if (!superCall || superCall.end > node.pos) {
+                        // In ES6, super inside constructor of class-declaration has to precede "this" accessing
+                        error(node, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
+                    }
+                }
+            }
+            // Now skip arrow functions to get the "real" owner of 'this'.
+            if (container.kind === 180 /* ArrowFunction */) {
+                container = ts.getThisContainer(container, /* includeArrowFunctions */ false);
+                // When targeting es6, arrow function lexically bind "this" so we do not need to do the work of binding "this" in emitted code
+                needToCaptureLexicalThis = (languageVersion < 2 /* ES6 */);
+            }
+            switch (container.kind) {
+                case 225 /* ModuleDeclaration */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
+                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
+                    break;
+                case 224 /* EnumDeclaration */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
+                    break;
+                case 148 /* Constructor */:
+                    if (isInConstructorArgumentInitializer(node, container)) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
+                    }
+                    break;
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                    if (container.flags & 32 /* Static */) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
+                    }
+                    break;
+                case 140 /* ComputedPropertyName */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
+                    break;
+            }
+            if (needToCaptureLexicalThis) {
+                captureLexicalThis(node, container);
+            }
+            if (ts.isFunctionLike(container) &&
+                (!isInParameterInitializerBeforeContainingFunction(node) || getFunctionLikeThisParameter(container))) {
+                // Note: a parameter initializer should refer to class-this unless function-this is explicitly annotated.
+                // If this is a function in a JS file, it might be a class method. Check if it's the RHS
+                // of a x.prototype.y = function [name]() { .... }
+                if (container.kind === 179 /* FunctionExpression */ &&
+                    ts.isInJavaScriptFile(container.parent) &&
+                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3 /* PrototypeProperty */) {
+                    // Get the 'x' of 'x.prototype.y = f' (here, 'f' is 'container')
+                    var className = container.parent // x.prototype.y = f
+                        .left // x.prototype.y
+                        .expression // x.prototype
+                        .expression; // x
+                    var classSymbol = checkExpression(className).symbol;
+                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16 /* Function */)) {
+                        return getInferredClassType(classSymbol);
+                    }
+                }
+                var type = getContextuallyTypedThisType(container);
+                if (type) {
+                    return type;
+                }
+                var signature = getSignatureFromDeclaration(container);
+                if (signature.thisType) {
+                    return signature.thisType;
+                }
+            }
+            if (ts.isClassLike(container.parent)) {
+                var symbol = getSymbolOfNode(container.parent);
+                var type = container.flags & 32 /* Static */ ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
+                return getFlowTypeOfReference(node, type, /*assumeInitialized*/ true, /*includeOuterFunctions*/ true);
+            }
+            if (ts.isInJavaScriptFile(node)) {
+                var type = getTypeForThisExpressionFromJSDoc(container);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            if (compilerOptions.noImplicitThis) {
+                // With noImplicitThis, functions may not reference 'this' if it has type 'any'
+                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
+            }
+            return anyType;
+        }
+        function getTypeForThisExpressionFromJSDoc(node) {
+            var typeTag = ts.getJSDocTypeTag(node);
+            if (typeTag && typeTag.typeExpression && typeTag.typeExpression.type && typeTag.typeExpression.type.kind === 269 /* JSDocFunctionType */) {
+                var jsDocFunctionType = typeTag.typeExpression.type;
+                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 272 /* JSDocThisType */) {
+                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
+                }
+            }
+        }
+        function isInConstructorArgumentInitializer(node, constructorDecl) {
+            for (var n = node; n && n !== constructorDecl; n = n.parent) {
+                if (n.kind === 142 /* Parameter */) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkSuperExpression(node) {
+            var isCallExpression = node.parent.kind === 174 /* CallExpression */ && node.parent.expression === node;
+            var container = ts.getSuperContainer(node, /*stopOnFunctions*/ true);
+            var needToCaptureLexicalThis = false;
+            if (!isCallExpression) {
+                // adjust the container reference in case if super is used inside arrow functions with arbitrary deep nesting
+                while (container && container.kind === 180 /* ArrowFunction */) {
+                    container = ts.getSuperContainer(container, /*stopOnFunctions*/ true);
+                    needToCaptureLexicalThis = languageVersion < 2 /* ES6 */;
+                }
+            }
+            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
+            var nodeCheckFlag = 0;
+            if (!canUseSuperExpression) {
+                // issue more specific error if super is used in computed property name
+                // class A { foo() { return "1" }}
+                // class B {
+                //     [super.foo()]() {}
+                // }
+                var current = node;
+                while (current && current !== container && current.kind !== 140 /* ComputedPropertyName */) {
+                    current = current.parent;
+                }
+                if (current && current.kind === 140 /* ComputedPropertyName */) {
+                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
+                }
+                else if (isCallExpression) {
+                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
+                }
+                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 171 /* ObjectLiteralExpression */)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
+                }
+                else {
+                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
+                }
+                return unknownType;
+            }
+            if ((container.flags & 32 /* Static */) || isCallExpression) {
+                nodeCheckFlag = 512 /* SuperStatic */;
+            }
+            else {
+                nodeCheckFlag = 256 /* SuperInstance */;
+            }
+            getNodeLinks(node).flags |= nodeCheckFlag;
+            // Due to how we emit async functions, we need to specialize the emit for an async method that contains a `super` reference.
+            // This is due to the fact that we emit the body of an async function inside of a generator function. As generator
+            // functions cannot reference `super`, we emit a helper inside of the method body, but outside of the generator. This helper
+            // uses an arrow function, which is permitted to reference `super`.
+            //
+            // There are two primary ways we can access `super` from within an async method. The first is getting the value of a property
+            // or indexed access on super, either as part of a right-hand-side expression or call expression. The second is when setting the value
+            // of a property or indexed access, either as part of an assignment expression or destructuring assignment.
+            //
+            // The simplest case is reading a value, in which case we will emit something like the following:
+            //
+            //  // ts
+            //  ...
+            //  async asyncMethod() {
+            //    let x = await super.asyncMethod();
+            //    return x;
+            //  }
+            //  ...
+            //
+            //  // js
+            //  ...
+            //  asyncMethod() {
+            //      const _super = name => super[name];
+            //      return __awaiter(this, arguments, Promise, function *() {
+            //          let x = yield _super("asyncMethod").call(this);
+            //          return x;
+            //      });
+            //  }
+            //  ...
+            //
+            // The more complex case is when we wish to assign a value, especially as part of a destructuring assignment. As both cases
+            // are legal in ES6, but also likely less frequent, we emit the same more complex helper for both scenarios:
+            //
+            //  // ts
+            //  ...
+            //  async asyncMethod(ar: Promise<any[]>) {
+            //      [super.a, super.b] = await ar;
+            //  }
+            //  ...
+            //
+            //  // js
+            //  ...
+            //  asyncMethod(ar) {
+            //      const _super = (function (geti, seti) {
+            //          const cache = Object.create(null);
+            //          return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
+            //      })(name => super[name], (name, value) => super[name] = value);
+            //      return __awaiter(this, arguments, Promise, function *() {
+            //          [_super("a").value, _super("b").value] = yield ar;
+            //      });
+            //  }
+            //  ...
+            //
+            // This helper creates an object with a "value" property that wraps the `super` property or indexed access for both get and set.
+            // This is required for destructuring assignments, as a call expression cannot be used as the target of a destructuring assignment
+            // while a property access can.
+            if (container.kind === 147 /* MethodDeclaration */ && container.flags & 256 /* Async */) {
+                if (ts.isSuperPropertyOrElementAccess(node.parent) && ts.isAssignmentTarget(node.parent)) {
+                    getNodeLinks(container).flags |= 4096 /* AsyncMethodWithSuperBinding */;
+                }
+                else {
+                    getNodeLinks(container).flags |= 2048 /* AsyncMethodWithSuper */;
+                }
+            }
+            if (needToCaptureLexicalThis) {
+                // call expressions are allowed only in constructors so they should always capture correct 'this'
+                // super property access expressions can also appear in arrow functions -
+                // in this case they should also use correct lexical this
+                captureLexicalThis(node.parent, container);
+            }
+            if (container.parent.kind === 171 /* ObjectLiteralExpression */) {
+                if (languageVersion < 2 /* ES6 */) {
+                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
+                    return unknownType;
+                }
+                else {
+                    // for object literal assume that type of 'super' is 'any'
+                    return anyType;
+                }
+            }
+            // at this point the only legal case for parent is ClassLikeDeclaration
+            var classLikeDeclaration = container.parent;
+            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
+            var baseClassType = classType && getBaseTypes(classType)[0];
+            if (!baseClassType) {
+                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
+                }
+                return unknownType;
+            }
+            if (container.kind === 148 /* Constructor */ && isInConstructorArgumentInitializer(node, container)) {
+                // issue custom error message for super property access in constructor arguments (to be aligned with old compiler)
+                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
+                return unknownType;
+            }
+            return nodeCheckFlag === 512 /* SuperStatic */
+                ? getBaseConstructorTypeOfClass(classType)
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
+            function isLegalUsageOfSuperExpression(container) {
+                if (!container) {
+                    return false;
+                }
+                if (isCallExpression) {
+                    // TS 1.0 SPEC (April 2014): 4.8.1
+                    // Super calls are only permitted in constructors of derived classes
+                    return container.kind === 148 /* Constructor */;
+                }
+                else {
+                    // TS 1.0 SPEC (April 2014)
+                    // 'super' property access is allowed
+                    // - In a constructor, instance member function, instance member accessor, or instance member variable initializer where this references a derived class instance
+                    // - In a static member function or static member accessor
+                    // topmost container must be something that is directly nested in the class declaration\object literal expression
+                    if (ts.isClassLike(container.parent) || container.parent.kind === 171 /* ObjectLiteralExpression */) {
+                        if (container.flags & 32 /* Static */) {
+                            return container.kind === 147 /* MethodDeclaration */ ||
+                                container.kind === 146 /* MethodSignature */ ||
+                                container.kind === 149 /* GetAccessor */ ||
+                                container.kind === 150 /* SetAccessor */;
+                        }
+                        else {
+                            return container.kind === 147 /* MethodDeclaration */ ||
+                                container.kind === 146 /* MethodSignature */ ||
+                                container.kind === 149 /* GetAccessor */ ||
+                                container.kind === 150 /* SetAccessor */ ||
+                                container.kind === 145 /* PropertyDeclaration */ ||
+                                container.kind === 144 /* PropertySignature */ ||
+                                container.kind === 148 /* Constructor */;
+                        }
+                    }
+                }
+                return false;
+            }
+        }
+        function getContextuallyTypedThisType(func) {
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func) && func.kind !== 180 /* ArrowFunction */) {
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    return contextualSignature.thisType;
+                }
+            }
+            return undefined;
+        }
+        // Return contextual type of parameter or undefined if no contextual type is available
+        function getContextuallyTypedParameterType(parameter) {
+            var func = parameter.parent;
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
+                var iife = ts.getImmediatelyInvokedFunctionExpression(func);
+                if (iife) {
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
+                        if (parameter.dotDotDotToken) {
+                            var restTypes = [];
+                            for (var i = indexOfParameter; i < iife.arguments.length; i++) {
+                                restTypes.push(getTypeOfExpression(iife.arguments[i]));
+                            }
+                            return createArrayType(getUnionType(restTypes));
+                        }
+                        var links = getNodeLinks(iife);
+                        var cached = links.resolvedSignature;
+                        links.resolvedSignature = anySignature;
+                        var type = checkExpression(iife.arguments[indexOfParameter]);
+                        links.resolvedSignature = cached;
+                        return type;
+                    }
+                }
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    var funcHasRestParameters = ts.hasRestParameter(func);
+                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (indexOfParameter < len) {
+                        return getTypeAtPosition(contextualSignature, indexOfParameter);
+                    }
+                    // If last parameter is contextually rest parameter get its type
+                    if (funcHasRestParameters &&
+                        indexOfParameter === (func.parameters.length - 1) &&
+                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
+                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
+                    }
+                }
+            }
+            return undefined;
+        }
+        // In a variable, parameter or property declaration with a type annotation,
+        //   the contextual type of an initializer expression is the type of the variable, parameter or property.
+        // Otherwise, in a parameter declaration of a contextually typed function expression,
+        //   the contextual type of an initializer expression is the contextual type of the parameter.
+        // Otherwise, in a variable or parameter declaration with a binding pattern name,
+        //   the contextual type of an initializer expression is the type implied by the binding pattern.
+        // Otherwise, in a binding pattern inside a variable or parameter declaration,
+        //   the contextual type of an initializer expression is the type annotation of the containing declaration, if present.
+        function getContextualTypeForInitializerExpression(node) {
+            var declaration = node.parent;
+            if (node === declaration.initializer) {
+                if (declaration.type) {
+                    return getTypeFromTypeNode(declaration.type);
+                }
+                if (declaration.kind === 142 /* Parameter */) {
+                    var type = getContextuallyTypedParameterType(declaration);
+                    if (type) {
+                        return type;
+                    }
+                }
+                if (ts.isBindingPattern(declaration.name)) {
+                    return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ true);
+                }
+                if (ts.isBindingPattern(declaration.parent)) {
+                    var parentDeclaration = declaration.parent.parent;
+                    var name_12 = declaration.propertyName || declaration.name;
+                    if (ts.isVariableLike(parentDeclaration) &&
+                        parentDeclaration.type &&
+                        !ts.isBindingPattern(name_12)) {
+                        var text = getTextOfPropertyName(name_12);
+                        if (text) {
+                            return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text);
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function getContextualTypeForReturnExpression(node) {
+            var func = ts.getContainingFunction(node);
+            if (ts.isAsyncFunctionLike(func)) {
+                var contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return getPromisedType(contextualReturnType);
+                }
+                return undefined;
+            }
+            if (func && !func.asteriskToken) {
+                return getContextualReturnType(func);
+            }
+            return undefined;
+        }
+        function getContextualTypeForYieldOperand(node) {
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return node.asteriskToken
+                        ? contextualReturnType
+                        : getElementTypeOfIterableIterator(contextualReturnType);
+                }
+            }
+            return undefined;
+        }
+        function isInParameterInitializerBeforeContainingFunction(node) {
+            while (node.parent && !ts.isFunctionLike(node.parent)) {
+                if (node.parent.kind === 142 /* Parameter */ && node.parent.initializer === node) {
+                    return true;
+                }
+                node = node.parent;
+            }
+            return false;
+        }
+        function getContextualReturnType(functionDecl) {
+            // If the containing function has a return type annotation, is a constructor, or is a get accessor whose
+            // corresponding set accessor has a type annotation, return statements in the function are contextually typed
+            if (functionDecl.type ||
+                functionDecl.kind === 148 /* Constructor */ ||
+                functionDecl.kind === 149 /* GetAccessor */ && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(functionDecl.symbol, 150 /* SetAccessor */))) {
+                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
+            }
+            // Otherwise, if the containing function is contextually typed by a function type with exactly one call signature
+            // and that call signature is non-generic, return statements are contextually typed by the return type of the signature
+            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
+            if (signature) {
+                return getReturnTypeOfSignature(signature);
+            }
+            return undefined;
+        }
+        // In a typed function call, an argument or substitution expression is contextually typed by the type of the corresponding parameter.
+        function getContextualTypeForArgument(callTarget, arg) {
+            var args = getEffectiveCallArguments(callTarget);
+            var argIndex = ts.indexOf(args, arg);
+            if (argIndex >= 0) {
+                var signature = getResolvedOrAnySignature(callTarget);
+                return getTypeAtPosition(signature, argIndex);
+            }
+            return undefined;
+        }
+        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
+            if (template.parent.kind === 176 /* TaggedTemplateExpression */) {
+                return getContextualTypeForArgument(template.parent, substitutionExpression);
+            }
+            return undefined;
+        }
+        function getContextualTypeForBinaryOperand(node) {
+            var binaryExpression = node.parent;
+            var operator = binaryExpression.operatorToken.kind;
+            if (operator >= 56 /* FirstAssignment */ && operator <= 68 /* LastAssignment */) {
+                // In an assignment expression, the right operand is contextually typed by the type of the left operand.
+                if (node === binaryExpression.right) {
+                    return checkExpression(binaryExpression.left);
+                }
+            }
+            else if (operator === 52 /* BarBarToken */) {
+                // When an || expression has a contextual type, the operands are contextually typed by that type. When an ||
+                // expression has no contextual type, the right operand is contextually typed by the type of the left operand.
+                var type = getContextualType(binaryExpression);
+                if (!type && node === binaryExpression.right) {
+                    type = checkExpression(binaryExpression.left);
+                }
+                return type;
+            }
+            else if (operator === 51 /* AmpersandAmpersandToken */ || operator === 24 /* CommaToken */) {
+                if (node === binaryExpression.right) {
+                    return getContextualType(binaryExpression);
+                }
+            }
+            return undefined;
+        }
+        // Apply a mapping function to a contextual type and return the resulting type. If the contextual type
+        // is a union type, the mapping function is applied to each constituent type and a union of the resulting
+        // types is returned.
+        function applyToContextualType(type, mapper) {
+            if (!(type.flags & 16384 /* Union */)) {
+                return mapper(type);
+            }
+            var types = type.types;
+            var mappedType;
+            var mappedTypes;
+            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
+                var current = types_8[_i];
+                var t = mapper(current);
+                if (t) {
+                    if (!mappedType) {
+                        mappedType = t;
+                    }
+                    else if (!mappedTypes) {
+                        mappedTypes = [mappedType, t];
+                    }
+                    else {
+                        mappedTypes.push(t);
+                    }
+                }
+            }
+            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
+        }
+        function getTypeOfPropertyOfContextualType(type, name) {
+            return applyToContextualType(type, function (t) {
+                var prop = t.flags & 130048 /* StructuredType */ ? getPropertyOfType(t, name) : undefined;
+                return prop ? getTypeOfSymbol(prop) : undefined;
+            });
+        }
+        function getIndexTypeOfContextualType(type, kind) {
+            return applyToContextualType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
+        }
+        function contextualTypeIsStringLiteralType(type) {
+            return !!(type.flags & 16384 /* Union */ ? ts.forEach(type.types, isStringLiteralType) : isStringLiteralType(type));
+        }
+        // Return true if the given contextual type is a tuple-like type
+        function contextualTypeIsTupleLikeType(type) {
+            return !!(type.flags & 16384 /* Union */ ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
+        }
+        // In an object literal contextually typed by a type T, the contextual type of a property assignment is the type of
+        // the matching property in T, if one exists. Otherwise, it is the type of the numeric index signature in T, if one
+        // exists. Otherwise, it is the type of the string index signature in T, if one exists.
+        function getContextualTypeForObjectLiteralMethod(node) {
+            ts.Debug.assert(ts.isObjectLiteralMethod(node));
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
+            }
+            return getContextualTypeForObjectLiteralElement(node);
+        }
+        function getContextualTypeForObjectLiteralElement(element) {
+            var objectLiteral = element.parent;
+            var type = getApparentTypeOfContextualType(objectLiteral);
+            if (type) {
+                if (!ts.hasDynamicName(element)) {
+                    // For a (non-symbol) computed property, there is no reason to look up the name
+                    // in the type. It will just be "__computed", which does not appear in any
+                    // SymbolTable.
+                    var symbolName = getSymbolOfNode(element).name;
+                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
+                    if (propertyType) {
+                        return propertyType;
+                    }
+                }
+                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1 /* Number */) ||
+                    getIndexTypeOfContextualType(type, 0 /* String */);
+            }
+            return undefined;
+        }
+        // In an array literal contextually typed by a type T, the contextual type of an element expression at index N is
+        // the type of the property with the numeric name N in T, if one exists. Otherwise, if T has a numeric index signature,
+        // it is the type of the numeric index signature in T. Otherwise, in ES6 and higher, the contextual type is the iterated
+        // type of T.
+        function getContextualTypeForElementExpression(node) {
+            var arrayLiteral = node.parent;
+            var type = getApparentTypeOfContextualType(arrayLiteral);
+            if (type) {
+                var index = ts.indexOf(arrayLiteral.elements, node);
+                return getTypeOfPropertyOfContextualType(type, "" + index)
+                    || getIndexTypeOfContextualType(type, 1 /* Number */)
+                    || (languageVersion >= 2 /* ES6 */ ? getElementTypeOfIterable(type, /*errorNode*/ undefined) : undefined);
+            }
+            return undefined;
+        }
+        // In a contextually typed conditional expression, the true/false expressions are contextually typed by the same type.
+        function getContextualTypeForConditionalOperand(node) {
+            var conditional = node.parent;
+            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
+        }
+        function getContextualTypeForJsxAttribute(attribute) {
+            var kind = attribute.kind;
+            var jsxElement = attribute.parent;
+            var attrsType = getJsxElementAttributesType(jsxElement);
+            if (attribute.kind === 246 /* JsxAttribute */) {
+                if (!attrsType || isTypeAny(attrsType)) {
+                    return undefined;
+                }
+                return getTypeOfPropertyOfType(attrsType, attribute.name.text);
+            }
+            else if (attribute.kind === 247 /* JsxSpreadAttribute */) {
+                return attrsType;
+            }
+            ts.Debug.fail("Expected JsxAttribute or JsxSpreadAttribute, got ts.SyntaxKind[" + kind + "]");
+        }
+        // Return the contextual type for a given expression node. During overload resolution, a contextual type may temporarily
+        // be "pushed" onto a node using the contextualType property.
+        function getApparentTypeOfContextualType(node) {
+            var type = getContextualType(node);
+            return type && getApparentType(type);
+        }
+        /**
+         * Woah! Do you really want to use this function?
+         *
+         * Unless you're trying to get the *non-apparent* type for a
+         * value-literal type or you're authoring relevant portions of this algorithm,
+         * you probably meant to use 'getApparentTypeOfContextualType'.
+         * Otherwise this may not be very useful.
+         *
+         * In cases where you *are* working on this function, you should understand
+         * when it is appropriate to use 'getContextualType' and 'getApparentTypeOfContextualType'.
+         *
+         *   - Use 'getContextualType' when you are simply going to propagate the result to the expression.
+         *   - Use 'getApparentTypeOfContextualType' when you're going to need the members of the type.
+         *
+         * @param node the expression whose contextual type will be returned.
+         * @returns the contextual type of an expression.
+         */
+        function getContextualType(node) {
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
+            }
+            if (node.contextualType) {
+                return node.contextualType;
+            }
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 218 /* VariableDeclaration */:
+                case 142 /* Parameter */:
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 169 /* BindingElement */:
+                    return getContextualTypeForInitializerExpression(node);
+                case 180 /* ArrowFunction */:
+                case 211 /* ReturnStatement */:
+                    return getContextualTypeForReturnExpression(node);
+                case 190 /* YieldExpression */:
+                    return getContextualTypeForYieldOperand(parent);
+                case 174 /* CallExpression */:
+                case 175 /* NewExpression */:
+                    return getContextualTypeForArgument(parent, node);
+                case 177 /* TypeAssertionExpression */:
+                case 195 /* AsExpression */:
+                    return getTypeFromTypeNode(parent.type);
+                case 187 /* BinaryExpression */:
+                    return getContextualTypeForBinaryOperand(node);
+                case 253 /* PropertyAssignment */:
+                    return getContextualTypeForObjectLiteralElement(parent);
+                case 170 /* ArrayLiteralExpression */:
+                    return getContextualTypeForElementExpression(node);
+                case 188 /* ConditionalExpression */:
+                    return getContextualTypeForConditionalOperand(node);
+                case 197 /* TemplateSpan */:
+                    ts.Debug.assert(parent.parent.kind === 189 /* TemplateExpression */);
+                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
+                case 178 /* ParenthesizedExpression */:
+                    return getContextualType(parent);
+                case 248 /* JsxExpression */:
+                    return getContextualType(parent);
+                case 246 /* JsxAttribute */:
+                case 247 /* JsxSpreadAttribute */:
+                    return getContextualTypeForJsxAttribute(parent);
+            }
+            return undefined;
+        }
+        // If the given type is an object or union type, if that type has a single signature, and if
+        // that signature is non-generic, return the signature. Otherwise return undefined.
+        function getNonGenericSignature(type) {
+            var signatures = getSignaturesOfStructuredType(type, 0 /* Call */);
+            if (signatures.length === 1) {
+                var signature = signatures[0];
+                if (!signature.typeParameters) {
+                    return signature;
+                }
+            }
+        }
+        function isFunctionExpressionOrArrowFunction(node) {
+            return node.kind === 179 /* FunctionExpression */ || node.kind === 180 /* ArrowFunction */;
+        }
+        function getContextualSignatureForFunctionLikeDeclaration(node) {
+            // Only function expressions, arrow functions, and object literal methods are contextually typed.
+            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
+                ? getContextualSignature(node)
+                : undefined;
+        }
+        function getContextualTypeForFunctionLikeDeclaration(node) {
+            return ts.isObjectLiteralMethod(node) ?
+                getContextualTypeForObjectLiteralMethod(node) :
+                getApparentTypeOfContextualType(node);
+        }
+        // Return the contextual signature for a given expression node. A contextual type provides a
+        // contextual signature if it has a single call signature and if that call signature is non-generic.
+        // If the contextual type is a union type, get the signature from each type possible and if they are
+        // all identical ignoring their return type, the result is same signature but with return type as
+        // union type of return types from these signatures
+        function getContextualSignature(node) {
+            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            var type = getContextualTypeForFunctionLikeDeclaration(node);
+            if (!type) {
+                return undefined;
+            }
+            if (!(type.flags & 16384 /* Union */)) {
+                return getNonGenericSignature(type);
+            }
+            var signatureList;
+            var types = type.types;
+            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
+                var current = types_9[_i];
+                var signature = getNonGenericSignature(current);
+                if (signature) {
+                    if (!signatureList) {
+                        // This signature will contribute to contextual union signature
+                        signatureList = [signature];
+                    }
+                    else if (!compareSignaturesIdentical(signatureList[0], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true, compareTypesIdentical)) {
+                        // Signatures aren't identical, do not use
+                        return undefined;
+                    }
+                    else {
+                        // Use this signature for contextual union signature
+                        signatureList.push(signature);
+                    }
+                }
+            }
+            // Result is union of signatures collected (return type is union of return types of this signature set)
+            var result;
+            if (signatureList) {
+                result = cloneSignature(signatureList[0]);
+                // Clear resolved return type we possibly got from cloneSignature
+                result.resolvedReturnType = undefined;
+                result.unionSignatures = signatureList;
+            }
+            return result;
+        }
+        /**
+         * Detect if the mapper implies an inference context. Specifically, there are 4 possible values
+         * for a mapper. Let's go through each one of them:
+         *
+         *    1. undefined - this means we are not doing inferential typing, but we may do contextual typing,
+         *       which could cause us to assign a parameter a type
+         *    2. identityMapper - means we want to avoid assigning a parameter a type, whether or not we are in
+         *       inferential typing (context is undefined for the identityMapper)
+         *    3. a mapper created by createInferenceMapper - we are doing inferential typing, we want to assign
+         *       types to parameters and fix type parameters (context is defined)
+         *    4. an instantiation mapper created by createTypeMapper or createTypeEraser - this should never be
+         *       passed as the contextual mapper when checking an expression (context is undefined for these)
+         *
+         * isInferentialContext is detecting if we are in case 3
+         */
+        function isInferentialContext(mapper) {
+            return mapper && mapper.context;
+        }
+        function checkSpreadElementExpression(node, contextualMapper) {
+            // It is usually not safe to call checkExpressionCached if we can be contextually typing.
+            // You can tell that we are contextually typing because of the contextualMapper parameter.
+            // While it is true that a spread element can have a contextual type, it does not do anything
+            // with this type. It is neither affected by it, nor does it propagate it to its operand.
+            // So the fact that contextualMapper is passed is not important, because the operand of a spread
+            // element is not contextually typed.
+            var arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
+            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, /*allowStringInput*/ false);
+        }
+        function hasDefaultValue(node) {
+            return (node.kind === 169 /* BindingElement */ && !!node.initializer) ||
+                (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 56 /* EqualsToken */);
+        }
+        function checkArrayLiteral(node, contextualMapper) {
+            var elements = node.elements;
+            var hasSpreadElement = false;
+            var elementTypes = [];
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
+                var e = elements_1[_i];
+                if (inDestructuringPattern && e.kind === 191 /* SpreadElementExpression */) {
+                    // Given the following situation:
+                    //    var c: {};
+                    //    [...c] = ["", 0];
+                    //
+                    // c is represented in the tree as a spread element in an array literal.
+                    // But c really functions as a rest element, and its purpose is to provide
+                    // a contextual type for the right hand side of the assignment. Therefore,
+                    // instead of calling checkExpression on "...c", which will give an error
+                    // if c is not iterable/array-like, we need to act as if we are trying to
+                    // get the contextual element type from it. So we do something similar to
+                    // getContextualTypeForElementExpression, which will crucially not error
+                    // if there is no index type / iterated type.
+                    var restArrayType = checkExpression(e.expression, contextualMapper);
+                    var restElementType = getIndexTypeOfType(restArrayType, 1 /* Number */) ||
+                        (languageVersion >= 2 /* ES6 */ ? getElementTypeOfIterable(restArrayType, /*errorNode*/ undefined) : undefined);
+                    if (restElementType) {
+                        elementTypes.push(restElementType);
+                    }
+                }
+                else {
+                    var type = checkExpression(e, contextualMapper);
+                    elementTypes.push(type);
+                }
+                hasSpreadElement = hasSpreadElement || e.kind === 191 /* SpreadElementExpression */;
+            }
+            if (!hasSpreadElement) {
+                // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
+                // that we get the same behavior for "var [x, y] = []" and "[x, y] = []".
+                if (inDestructuringPattern && elementTypes.length) {
+                    var type = createNewTupleType(elementTypes);
+                    type.pattern = node;
+                    return type;
+                }
+                var contextualType = getApparentTypeOfContextualType(node);
+                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
+                    var pattern = contextualType.pattern;
+                    // If array literal is contextually typed by a binding pattern or an assignment pattern, pad the resulting
+                    // tuple type with the corresponding binding or assignment element types to make the lengths equal.
+                    if (pattern && (pattern.kind === 168 /* ArrayBindingPattern */ || pattern.kind === 170 /* ArrayLiteralExpression */)) {
+                        var patternElements = pattern.elements;
+                        for (var i = elementTypes.length; i < patternElements.length; i++) {
+                            var patternElement = patternElements[i];
+                            if (hasDefaultValue(patternElement)) {
+                                elementTypes.push(contextualType.elementTypes[i]);
+                            }
+                            else {
+                                if (patternElement.kind !== 193 /* OmittedExpression */) {
+                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                                }
+                                elementTypes.push(unknownType);
+                            }
+                        }
+                    }
+                    if (elementTypes.length) {
+                        return createTupleType(elementTypes);
+                    }
+                }
+            }
+            return createArrayType(elementTypes.length ? getUnionType(elementTypes) : strictNullChecks ? neverType : undefinedWideningType);
+        }
+        function isNumericName(name) {
+            return name.kind === 140 /* ComputedPropertyName */ ? isNumericComputedName(name) : isNumericLiteralName(name.text);
+        }
+        function isNumericComputedName(name) {
+            // It seems odd to consider an expression of type Any to result in a numeric name,
+            // but this behavior is consistent with checkIndexedAccess
+            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 132 /* NumberLike */);
+        }
+        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
+            return isTypeAny(type) || isTypeOfKind(type, kind);
+        }
+        function isNumericLiteralName(name) {
+            // The intent of numeric names is that
+            //     - they are names with text in a numeric form, and that
+            //     - setting properties/indexing with them is always equivalent to doing so with the numeric literal 'numLit',
+            //         acquired by applying the abstract 'ToNumber' operation on the name's text.
+            //
+            // The subtlety is in the latter portion, as we cannot reliably say that anything that looks like a numeric literal is a numeric name.
+            // In fact, it is the case that the text of the name must be equal to 'ToString(numLit)' for this to hold.
+            //
+            // Consider the property name '"0xF00D"'. When one indexes with '0xF00D', they are actually indexing with the value of 'ToString(0xF00D)'
+            // according to the ECMAScript specification, so it is actually as if the user indexed with the string '"61453"'.
+            // Thus, the text of all numeric literals equivalent to '61543' such as '0xF00D', '0xf00D', '0170015', etc. are not valid numeric names
+            // because their 'ToString' representation is not equal to their original text.
+            // This is motivated by ECMA-262 sections 9.3.1, 9.8.1, 11.1.5, and 11.2.1.
+            //
+            // Here, we test whether 'ToString(ToNumber(name))' is exactly equal to 'name'.
+            // The '+' prefix operator is equivalent here to applying the abstract ToNumber operation.
+            // Applying the 'toString()' method on a number gives us the abstract ToString operation on a number.
+            //
+            // Note that this accepts the values 'Infinity', '-Infinity', and 'NaN', and that this is intentional.
+            // This is desired behavior, because when indexing with them as numeric entities, you are indexing
+            // with the strings '"Infinity"', '"-Infinity"', and '"NaN"' respectively.
+            return (+name).toString() === name;
+        }
+        function checkComputedPropertyName(node) {
+            var links = getNodeLinks(node.expression);
+            if (!links.resolvedType) {
+                links.resolvedType = checkExpression(node.expression);
+                // This will allow types number, string, symbol or any. It will also allow enums, the unknown
+                // type, and any union of these types (like string | number).
+                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 132 /* NumberLike */ | 258 /* StringLike */ | 16777216 /* ESSymbol */)) {
+                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
+                }
+                else {
+                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, /*reportError*/ true);
+                }
+            }
+            return links.resolvedType;
+        }
+        function getObjectLiteralIndexInfo(node, properties, kind) {
+            var propTypes = [];
+            for (var i = 0; i < properties.length; i++) {
+                if (kind === 0 /* String */ || isNumericName(node.properties[i].name)) {
+                    propTypes.push(getTypeOfSymbol(properties[i]));
+                }
+            }
+            var unionType = propTypes.length ? getUnionType(propTypes) : undefinedType;
+            return createIndexInfo(unionType, /*isReadonly*/ false);
+        }
+        function checkObjectLiteral(node, contextualMapper) {
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            // Grammar checking
+            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
+            var propertiesTable = {};
+            var propertiesArray = [];
+            var contextualType = getApparentTypeOfContextualType(node);
+            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
+                (contextualType.pattern.kind === 167 /* ObjectBindingPattern */ || contextualType.pattern.kind === 171 /* ObjectLiteralExpression */);
+            var typeFlags = 0;
+            var patternWithComputedProperties = false;
+            var hasComputedStringProperty = false;
+            var hasComputedNumberProperty = false;
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var memberDecl = _a[_i];
+                var member = memberDecl.symbol;
+                if (memberDecl.kind === 253 /* PropertyAssignment */ ||
+                    memberDecl.kind === 254 /* ShorthandPropertyAssignment */ ||
+                    ts.isObjectLiteralMethod(memberDecl)) {
+                    var type = void 0;
+                    if (memberDecl.kind === 253 /* PropertyAssignment */) {
+                        type = checkPropertyAssignment(memberDecl, contextualMapper);
+                    }
+                    else if (memberDecl.kind === 147 /* MethodDeclaration */) {
+                        type = checkObjectLiteralMethod(memberDecl, contextualMapper);
+                    }
+                    else {
+                        ts.Debug.assert(memberDecl.kind === 254 /* ShorthandPropertyAssignment */);
+                        type = checkExpression(memberDecl.name, contextualMapper);
+                    }
+                    typeFlags |= type.flags;
+                    var prop = createSymbol(4 /* Property */ | 67108864 /* Transient */ | member.flags, member.name);
+                    if (inDestructuringPattern) {
+                        // If object literal is an assignment pattern and if the assignment pattern specifies a default value
+                        // for the property, make the property optional.
+                        var isOptional = (memberDecl.kind === 253 /* PropertyAssignment */ && hasDefaultValue(memberDecl.initializer)) ||
+                            (memberDecl.kind === 254 /* ShorthandPropertyAssignment */ && memberDecl.objectAssignmentInitializer);
+                        if (isOptional) {
+                            prop.flags |= 536870912 /* Optional */;
+                        }
+                        if (ts.hasDynamicName(memberDecl)) {
+                            patternWithComputedProperties = true;
+                        }
+                    }
+                    else if (contextualTypeHasPattern && !(contextualType.flags & 67108864 /* ObjectLiteralPatternWithComputedProperties */)) {
+                        // If object literal is contextually typed by the implied type of a binding pattern, and if the
+                        // binding pattern specifies a default value for the property, make the property optional.
+                        var impliedProp = getPropertyOfType(contextualType, member.name);
+                        if (impliedProp) {
+                            prop.flags |= impliedProp.flags & 536870912 /* Optional */;
+                        }
+                        else if (!compilerOptions.suppressExcessPropertyErrors) {
+                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
+                        }
+                    }
+                    prop.declarations = member.declarations;
+                    prop.parent = member.parent;
+                    if (member.valueDeclaration) {
+                        prop.valueDeclaration = member.valueDeclaration;
+                    }
+                    prop.type = type;
+                    prop.target = member;
+                    member = prop;
+                }
+                else {
+                    // TypeScript 1.0 spec (April 2014)
+                    // A get accessor declaration is processed in the same manner as
+                    // an ordinary function declaration(section 6.1) with no parameters.
+                    // A set accessor declaration is processed in the same manner
+                    // as an ordinary function declaration with a single parameter and a Void return type.
+                    ts.Debug.assert(memberDecl.kind === 149 /* GetAccessor */ || memberDecl.kind === 150 /* SetAccessor */);
+                    checkAccessorDeclaration(memberDecl);
+                }
+                if (ts.hasDynamicName(memberDecl)) {
+                    if (isNumericName(memberDecl.name)) {
+                        hasComputedNumberProperty = true;
+                    }
+                    else {
+                        hasComputedStringProperty = true;
+                    }
+                }
+                else {
+                    propertiesTable[member.name] = member;
+                }
+                propertiesArray.push(member);
+            }
+            // If object literal is contextually typed by the implied type of a binding pattern, augment the result
+            // type with those properties for which the binding pattern specifies a default value.
+            if (contextualTypeHasPattern) {
+                for (var _b = 0, _c = getPropertiesOfType(contextualType); _b < _c.length; _b++) {
+                    var prop = _c[_b];
+                    if (!ts.hasProperty(propertiesTable, prop.name)) {
+                        if (!(prop.flags & 536870912 /* Optional */)) {
+                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                        }
+                        propertiesTable[prop.name] = prop;
+                        propertiesArray.push(prop);
+                    }
+                }
+            }
+            var stringIndexInfo = hasComputedStringProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 0 /* String */) : undefined;
+            var numberIndexInfo = hasComputedNumberProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 1 /* Number */) : undefined;
+            var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
+            var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576 /* FreshObjectLiteral */;
+            result.flags |= 524288 /* ObjectLiteral */ | 4194304 /* ContainsObjectLiteral */ | freshObjectLiteralFlag | (typeFlags & 14680064 /* PropagatingFlags */) | (patternWithComputedProperties ? 67108864 /* ObjectLiteralPatternWithComputedProperties */ : 0);
+            if (inDestructuringPattern) {
+                result.pattern = node;
+            }
+            return result;
+        }
+        function checkJsxSelfClosingElement(node) {
+            checkJsxOpeningLikeElement(node);
+            return jsxElementType || anyType;
+        }
+        function checkJsxElement(node) {
+            // Check attributes
+            checkJsxOpeningLikeElement(node.openingElement);
+            // Perform resolution on the closing tag so that rename/go to definition/etc work
+            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
+                getIntrinsicTagSymbol(node.closingElement);
+            }
+            else {
+                checkExpression(node.closingElement.tagName);
+            }
+            // Check children
+            for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
+                var child = _a[_i];
+                switch (child.kind) {
+                    case 248 /* JsxExpression */:
+                        checkJsxExpression(child);
+                        break;
+                    case 241 /* JsxElement */:
+                        checkJsxElement(child);
+                        break;
+                    case 242 /* JsxSelfClosingElement */:
+                        checkJsxSelfClosingElement(child);
+                        break;
+                }
+            }
+            return jsxElementType || anyType;
+        }
+        /**
+         * Returns true iff the JSX element name would be a valid JS identifier, ignoring restrictions about keywords not being identifiers
+         */
+        function isUnhyphenatedJsxName(name) {
+            // - is the only character supported in JSX attribute names that isn't valid in JavaScript identifiers
+            return name.indexOf("-") < 0;
+        }
+        /**
+         * Returns true iff React would emit this tag name as a string rather than an identifier or qualified name
+         */
+        function isJsxIntrinsicIdentifier(tagName) {
+            if (tagName.kind === 139 /* QualifiedName */) {
+                return false;
+            }
+            else {
+                return ts.isIntrinsicJsxName(tagName.text);
+            }
+        }
+        function checkJsxAttribute(node, elementAttributesType, nameTable) {
+            var correspondingPropType = undefined;
+            // Look up the corresponding property for this attribute
+            if (elementAttributesType === emptyObjectType && isUnhyphenatedJsxName(node.name.text)) {
+                // If there is no 'props' property, you may not have non-"data-" attributes
+                error(node.parent, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
+            }
+            else if (elementAttributesType && !isTypeAny(elementAttributesType)) {
+                var correspondingPropSymbol = getPropertyOfType(elementAttributesType, node.name.text);
+                correspondingPropType = correspondingPropSymbol && getTypeOfSymbol(correspondingPropSymbol);
+                if (isUnhyphenatedJsxName(node.name.text)) {
+                    // Maybe there's a string indexer?
+                    var indexerType = getIndexTypeOfType(elementAttributesType, 0 /* String */);
+                    if (indexerType) {
+                        correspondingPropType = indexerType;
+                    }
+                    else {
+                        // If there's no corresponding property with this name, error
+                        if (!correspondingPropType) {
+                            error(node.name, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.name.text, typeToString(elementAttributesType));
+                            return unknownType;
+                        }
+                    }
+                }
+            }
+            var exprType;
+            if (node.initializer) {
+                exprType = checkExpression(node.initializer);
+            }
+            else {
+                // <Elem attr /> is sugar for <Elem attr={true} />
+                exprType = booleanType;
+            }
+            if (correspondingPropType) {
+                checkTypeAssignableTo(exprType, correspondingPropType, node);
+            }
+            nameTable[node.name.text] = true;
+            return exprType;
+        }
+        function checkJsxSpreadAttribute(node, elementAttributesType, nameTable) {
+            var type = checkExpression(node.expression);
+            var props = getPropertiesOfType(type);
+            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
+                var prop = props_2[_i];
+                // Is there a corresponding property in the element attributes type? Skip checking of properties
+                // that have already been assigned to, as these are not actually pushed into the resulting type
+                if (!nameTable[prop.name]) {
+                    var targetPropSym = getPropertyOfType(elementAttributesType, prop.name);
+                    if (targetPropSym) {
+                        var msg = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property, prop.name);
+                        checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(targetPropSym), node, undefined, msg);
+                    }
+                    nameTable[prop.name] = true;
+                }
+            }
+            return type;
+        }
+        function getJsxType(name) {
+            if (jsxTypes[name] === undefined) {
+                return jsxTypes[name] = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType;
+            }
+            return jsxTypes[name];
+        }
+        /**
+          * Looks up an intrinsic tag name and returns a symbol that either points to an intrinsic
+          * property (in which case nodeLinks.jsxFlags will be IntrinsicNamedElement) or an intrinsic
+          * string index signature (in which case nodeLinks.jsxFlags will be IntrinsicIndexedElement).
+          * May also return unknownSymbol if both of these lookups fail.
+          */
+        function getIntrinsicTagSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
+                if (intrinsicElementsType !== unknownType) {
+                    // Property case
+                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
+                    if (intrinsicProp) {
+                        links.jsxFlags |= 1 /* IntrinsicNamedElement */;
+                        return links.resolvedSymbol = intrinsicProp;
+                    }
+                    // Intrinsic string indexer case
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
+                    if (indexSignatureType) {
+                        links.jsxFlags |= 2 /* IntrinsicIndexedElement */;
+                        return links.resolvedSymbol = intrinsicElementsType.symbol;
+                    }
+                    // Wasn't found
+                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
+                    return links.resolvedSymbol = unknownSymbol;
+                }
+                else {
+                    if (compilerOptions.noImplicitAny) {
+                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
+                    }
+                    return links.resolvedSymbol = unknownSymbol;
+                }
+            }
+            return links.resolvedSymbol;
+        }
+        /**
+         * Given a JSX element that is a class element, finds the Element Instance Type. If the
+         * element is not a class element, or the class element type cannot be determined, returns 'undefined'.
+         * For example, in the element <MyClass>, the element instance type is `MyClass` (not `typeof MyClass`).
+         */
+        function getJsxElementInstanceType(node, valueType) {
+            ts.Debug.assert(!(valueType.flags & 16384 /* Union */));
+            if (isTypeAny(valueType)) {
+                // Short-circuit if the class tag is using an element type 'any'
+                return anyType;
+            }
+            // Resolve the signatures, preferring constructor
+            var signatures = getSignaturesOfType(valueType, 1 /* Construct */);
+            if (signatures.length === 0) {
+                // No construct signatures, try call signatures
+                signatures = getSignaturesOfType(valueType, 0 /* Call */);
+                if (signatures.length === 0) {
+                    // We found no signatures at all, which is an error
+                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
+                    return unknownType;
+                }
+            }
+            return getUnionType(signatures.map(getReturnTypeOfSignature));
+        }
+        /// e.g. "props" for React.d.ts,
+        /// or 'undefined' if ElementAttributesProperty doesn't exist (which means all
+        ///     non-intrinsic elements' attributes type is 'any'),
+        /// or '' if it has 0 properties (which means every
+        ///     non-intrinsic elements' attributes type is the element instance type)
+        function getJsxElementPropertiesName() {
+            // JSX
+            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1536 /* Namespace */, /*diagnosticMessage*/ undefined);
+            // JSX.ElementAttributesProperty [symbol]
+            var attribsPropTypeSym = jsxNamespace && getSymbol(jsxNamespace.exports, JsxNames.ElementAttributesPropertyNameContainer, 793056 /* Type */);
+            // JSX.ElementAttributesProperty [type]
+            var attribPropType = attribsPropTypeSym && getDeclaredTypeOfSymbol(attribsPropTypeSym);
+            // The properties of JSX.ElementAttributesProperty
+            var attribProperties = attribPropType && getPropertiesOfType(attribPropType);
+            if (attribProperties) {
+                // Element Attributes has zero properties, so the element attributes type will be the class instance type
+                if (attribProperties.length === 0) {
+                    return "";
+                }
+                else if (attribProperties.length === 1) {
+                    return attribProperties[0].name;
+                }
+                else {
+                    error(attribsPropTypeSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, JsxNames.ElementAttributesPropertyNameContainer);
+                    return undefined;
+                }
+            }
+            else {
+                // No interface exists, so the element attributes type will be an implicit any
+                return undefined;
+            }
+        }
+        /**
+         * Given React element instance type and the class type, resolve the Jsx type
+         * Pass elemType to handle individual type in the union typed element type.
+         */
+        function getResolvedJsxType(node, elemType, elemClassType) {
+            if (!elemType) {
+                elemType = checkExpression(node.tagName);
+            }
+            if (elemType.flags & 16384 /* Union */) {
+                var types = elemType.types;
+                return getUnionType(types.map(function (type) {
+                    return getResolvedJsxType(node, type, elemClassType);
+                }));
+            }
+            // Get the element instance type (the result of newing or invoking this tag)
+            var elemInstanceType = getJsxElementInstanceType(node, elemType);
+            if (!elemClassType || !isTypeAssignableTo(elemInstanceType, elemClassType)) {
+                // Is this is a stateless function component? See if its single signature's return type is
+                // assignable to the JSX Element Type
+                if (jsxElementType) {
+                    var callSignatures = elemType && getSignaturesOfType(elemType, 0 /* Call */);
+                    var callSignature = callSignatures && callSignatures.length > 0 && callSignatures[0];
+                    var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
+                    var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                    if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType)) {
+                        // Intersect in JSX.IntrinsicAttributes if it exists
+                        var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
+                        if (intrinsicAttributes !== unknownType) {
+                            paramType = intersectTypes(intrinsicAttributes, paramType);
+                        }
+                        return paramType;
+                    }
+                }
+            }
+            // Issue an error if this return type isn't assignable to JSX.ElementClass
+            if (elemClassType) {
+                checkTypeRelatedTo(elemInstanceType, elemClassType, assignableRelation, node, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
+            }
+            if (isTypeAny(elemInstanceType)) {
+                return elemInstanceType;
+            }
+            var propsName = getJsxElementPropertiesName();
+            if (propsName === undefined) {
+                // There is no type ElementAttributesProperty, return 'any'
+                return anyType;
+            }
+            else if (propsName === "") {
+                // If there is no e.g. 'props' member in ElementAttributesProperty, use the element class type instead
+                return elemInstanceType;
+            }
+            else {
+                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
+                if (!attributesType) {
+                    // There is no property named 'props' on this instance type
+                    return emptyObjectType;
+                }
+                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
+                    // Props is of type 'any' or unknown
+                    return attributesType;
+                }
+                else if (attributesType.flags & 16384 /* Union */) {
+                    // Props cannot be a union type
+                    error(node.tagName, ts.Diagnostics.JSX_element_attributes_type_0_may_not_be_a_union_type, typeToString(attributesType));
+                    return anyType;
+                }
+                else {
+                    // Normal case -- add in IntrinsicClassElements<T> and IntrinsicElements
+                    var apparentAttributesType = attributesType;
+                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
+                    if (intrinsicClassAttribs !== unknownType) {
+                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
+                        if (typeParams) {
+                            if (typeParams.length === 1) {
+                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
+                            }
+                        }
+                        else {
+                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
+                        }
+                    }
+                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
+                    if (intrinsicAttribs !== unknownType) {
+                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
+                    }
+                    return apparentAttributesType;
+                }
+            }
+        }
+        /**
+         * Given an opening/self-closing element, get the 'element attributes type', i.e. the type that tells
+         * us which attributes are valid on a given element.
+         */
+        function getJsxElementAttributesType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedJsxType) {
+                if (isJsxIntrinsicIdentifier(node.tagName)) {
+                    var symbol = getIntrinsicTagSymbol(node);
+                    if (links.jsxFlags & 1 /* IntrinsicNamedElement */) {
+                        return links.resolvedJsxType = getTypeOfSymbol(symbol);
+                    }
+                    else if (links.jsxFlags & 2 /* IntrinsicIndexedElement */) {
+                        return links.resolvedJsxType = getIndexInfoOfSymbol(symbol, 0 /* String */).type;
+                    }
+                    else {
+                        return links.resolvedJsxType = unknownType;
+                    }
+                }
+                else {
+                    var elemClassType = getJsxGlobalElementClassType();
+                    return links.resolvedJsxType = getResolvedJsxType(node, undefined, elemClassType);
+                }
+            }
+            return links.resolvedJsxType;
+        }
+        /**
+         * Given a JSX attribute, returns the symbol for the corresponds property
+         * of the element attributes type. Will return unknownSymbol for attributes
+         * that have no matching element attributes type property.
+         */
+        function getJsxAttributePropertySymbol(attrib) {
+            var attributesType = getJsxElementAttributesType(attrib.parent);
+            var prop = getPropertyOfType(attributesType, attrib.name.text);
+            return prop || unknownSymbol;
+        }
+        function getJsxGlobalElementClassType() {
+            if (!jsxElementClassType) {
+                jsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
+            }
+            return jsxElementClassType;
+        }
+        /// Returns all the properties of the Jsx.IntrinsicElements interface
+        function getJsxIntrinsicTagNames() {
+            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
+            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
+        }
+        function checkJsxPreconditions(errorNode) {
+            // Preconditions for using JSX
+            if ((compilerOptions.jsx || 0 /* None */) === 0 /* None */) {
+                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
+            }
+            if (jsxElementType === undefined) {
+                if (compilerOptions.noImplicitAny) {
+                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
+                }
+            }
+        }
+        function checkJsxOpeningLikeElement(node) {
+            checkGrammarJsxElement(node);
+            checkJsxPreconditions(node);
+            // The reactNamespace symbol should be marked as 'used' so we don't incorrectly elide its import. And if there
+            // is no reactNamespace symbol in scope when targeting React emit, we should issue an error.
+            var reactRefErr = compilerOptions.jsx === 2 /* React */ ? ts.Diagnostics.Cannot_find_name_0 : undefined;
+            var reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
+            var reactSym = resolveName(node.tagName, reactNamespace, 107455 /* Value */, reactRefErr, reactNamespace);
+            if (reactSym) {
+                getSymbolLinks(reactSym).referenced = true;
+            }
+            var targetAttributesType = getJsxElementAttributesType(node);
+            var nameTable = {};
+            // Process this array in right-to-left order so we know which
+            // attributes (mostly from spreads) are being overwritten and
+            // thus should have their types ignored
+            var sawSpreadedAny = false;
+            for (var i = node.attributes.length - 1; i >= 0; i--) {
+                if (node.attributes[i].kind === 246 /* JsxAttribute */) {
+                    checkJsxAttribute((node.attributes[i]), targetAttributesType, nameTable);
+                }
+                else {
+                    ts.Debug.assert(node.attributes[i].kind === 247 /* JsxSpreadAttribute */);
+                    var spreadType = checkJsxSpreadAttribute((node.attributes[i]), targetAttributesType, nameTable);
+                    if (isTypeAny(spreadType)) {
+                        sawSpreadedAny = true;
+                    }
+                }
+            }
+            // Check that all required properties have been provided. If an 'any'
+            // was spreaded in, though, assume that it provided all required properties
+            if (targetAttributesType && !sawSpreadedAny) {
+                var targetProperties = getPropertiesOfType(targetAttributesType);
+                for (var i = 0; i < targetProperties.length; i++) {
+                    if (!(targetProperties[i].flags & 536870912 /* Optional */) &&
+                        nameTable[targetProperties[i].name] === undefined) {
+                        error(node, ts.Diagnostics.Property_0_is_missing_in_type_1, targetProperties[i].name, typeToString(targetAttributesType));
+                    }
+                }
+            }
+        }
+        function checkJsxExpression(node) {
+            if (node.expression) {
+                return checkExpression(node.expression);
+            }
+            else {
+                return unknownType;
+            }
+        }
+        // If a symbol is a synthesized symbol with no value declaration, we assume it is a property. Example of this are the synthesized
+        // '.prototype' property as well as synthesized tuple index properties.
+        function getDeclarationKindFromSymbol(s) {
+            return s.valueDeclaration ? s.valueDeclaration.kind : 145 /* PropertyDeclaration */;
+        }
+        function getDeclarationFlagsFromSymbol(s) {
+            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : s.flags & 134217728 /* Prototype */ ? 4 /* Public */ | 32 /* Static */ : 0;
+        }
+        /**
+         * Check whether the requested property access is valid.
+         * Returns true if node is a valid property access, and false otherwise.
+         * @param node The node to be checked.
+         * @param left The left hand side of the property access (e.g.: the super in `super.foo`).
+         * @param type The type of left.
+         * @param prop The symbol for the right hand side of the property access.
+         */
+        function checkClassPropertyAccess(node, left, type, prop) {
+            var flags = getDeclarationFlagsFromSymbol(prop);
+            var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop));
+            var errorNode = node.kind === 172 /* PropertyAccessExpression */ || node.kind === 218 /* VariableDeclaration */ ?
+                node.name :
+                node.right;
+            if (left.kind === 95 /* SuperKeyword */) {
+                // TS 1.0 spec (April 2014): 4.8.2
+                // - In a constructor, instance member function, instance member accessor, or
+                //   instance member variable initializer where this references a derived class instance,
+                //   a super property access is permitted and must specify a public instance member function of the base class.
+                // - In a static member function or static member accessor
+                //   where this references the constructor function object of a derived class,
+                //   a super property access is permitted and must specify a public static member function of the base class.
+                if (languageVersion < 2 /* ES6 */ && getDeclarationKindFromSymbol(prop) !== 147 /* MethodDeclaration */) {
+                    // `prop` refers to a *property* declared in the super class
+                    // rather than a *method*, so it does not satisfy the above criteria.
+                    error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
+                    return false;
+                }
+                if (flags & 128 /* Abstract */) {
+                    // A method cannot be accessed in a super property access if the method is abstract.
+                    // This error could mask a private property access error. But, a member
+                    // cannot simultaneously be private and abstract, so this will trigger an
+                    // additional error elsewhere.
+                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass));
+                    return false;
+                }
+            }
+            // Public properties are otherwise accessible.
+            if (!(flags & (8 /* Private */ | 16 /* Protected */))) {
+                return true;
+            }
+            // Property is known to be private or protected at this point
+            // Private property is accessible if the property is within the declaring class
+            if (flags & 8 /* Private */) {
+                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
+                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass));
+                    return false;
+                }
+                return true;
+            }
+            // Property is known to be protected at this point
+            // All protected properties of a supertype are accessible in a super access
+            if (left.kind === 95 /* SuperKeyword */) {
+                return true;
+            }
+            // Get the enclosing class that has the declaring class as its base type
+            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
+                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
+                return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined;
+            });
+            // A protected property is accessible if the property is within the declaring class or classes derived from it
+            if (!enclosingClass) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass));
+                return false;
+            }
+            // No further restrictions for static properties
+            if (flags & 32 /* Static */) {
+                return true;
+            }
+            // An instance property must be accessed through an instance of the enclosing class
+            if (type.flags & 33554432 /* ThisType */) {
+                // get the original type -- represented as the type constraint of the 'this' type
+                type = getConstraintOfTypeParameter(type);
+            }
+            // TODO: why is the first part of this check here?
+            if (!(getTargetType(type).flags & (1024 /* Class */ | 2048 /* Interface */) && hasBaseType(type, enclosingClass))) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
+                return false;
+            }
+            return true;
+        }
+        function checkNonNullExpression(node) {
+            var type = checkExpression(node);
+            if (strictNullChecks) {
+                var kind = getCombinedTypeFlags(type) & 96 /* Nullable */;
+                if (kind) {
+                    error(node, kind & 32 /* Undefined */ ? kind & 64 /* Null */ ?
+                        ts.Diagnostics.Object_is_possibly_null_or_undefined :
+                        ts.Diagnostics.Object_is_possibly_undefined :
+                        ts.Diagnostics.Object_is_possibly_null);
+                }
+                return getNonNullableType(type);
+            }
+            return type;
+        }
+        function checkPropertyAccessExpression(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
+        }
+        function checkQualifiedName(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
+        }
+        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
+            var type = checkNonNullExpression(left);
+            if (isTypeAny(type)) {
+                return type;
+            }
+            var apparentType = getApparentType(getWidenedType(type));
+            if (apparentType === unknownType || (type.flags & 512 /* TypeParameter */ && isTypeAny(apparentType))) {
+                // handle cases when type is Type parameter with invalid or any constraint
+                return apparentType;
+            }
+            var prop = getPropertyOfType(apparentType, right.text);
+            if (!prop) {
+                if (right.text) {
+                    error(right, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(right), typeToString(type.flags & 33554432 /* ThisType */ ? apparentType : type));
+                }
+                return unknownType;
+            }
+            getNodeLinks(node).resolvedSymbol = prop;
+            if (prop.parent && prop.parent.flags & 32 /* Class */) {
+                checkClassPropertyAccess(node, left, apparentType, prop);
+            }
+            var propType = getTypeOfSymbol(prop);
+            // Only compute control flow type if this is a property access expression that isn't an
+            // assignment target, and the referenced property was declared as a variable, property,
+            // accessor, or optional method.
+            if (node.kind !== 172 /* PropertyAccessExpression */ || ts.isAssignmentTarget(node) ||
+                !(prop.flags & (3 /* Variable */ | 4 /* Property */ | 98304 /* Accessor */)) &&
+                    !(prop.flags & 8192 /* Method */ && propType.flags & 16384 /* Union */)) {
+                return propType;
+            }
+            return getFlowTypeOfReference(node, propType, /*assumeInitialized*/ true, /*includeOuterFunctions*/ false);
+        }
+        function isValidPropertyAccess(node, propertyName) {
+            var left = node.kind === 172 /* PropertyAccessExpression */
+                ? node.expression
+                : node.left;
+            var type = checkExpression(left);
+            if (type !== unknownType && !isTypeAny(type)) {
+                var prop = getPropertyOfType(getWidenedType(type), propertyName);
+                if (prop && prop.parent && prop.parent.flags & 32 /* Class */) {
+                    return checkClassPropertyAccess(node, left, type, prop);
+                }
+            }
+            return true;
+        }
+        /**
+         * Return the symbol of the for-in variable declared or referenced by the given for-in statement.
+         */
+        function getForInVariableSymbol(node) {
+            var initializer = node.initializer;
+            if (initializer.kind === 219 /* VariableDeclarationList */) {
+                var variable = initializer.declarations[0];
+                if (variable && !ts.isBindingPattern(variable.name)) {
+                    return getSymbolOfNode(variable);
+                }
+            }
+            else if (initializer.kind === 69 /* Identifier */) {
+                return getResolvedSymbol(initializer);
+            }
+            return undefined;
+        }
+        /**
+         * Return true if the given type is considered to have numeric property names.
+         */
+        function hasNumericPropertyNames(type) {
+            return getIndexTypeOfType(type, 1 /* Number */) && !getIndexTypeOfType(type, 0 /* String */);
+        }
+        /**
+         * Return true if given node is an expression consisting of an identifier (possibly parenthesized)
+         * that references a for-in variable for an object with numeric property names.
+         */
+        function isForInVariableForNumericPropertyNames(expr) {
+            var e = skipParenthesizedNodes(expr);
+            if (e.kind === 69 /* Identifier */) {
+                var symbol = getResolvedSymbol(e);
+                if (symbol.flags & 3 /* Variable */) {
+                    var child = expr;
+                    var node = expr.parent;
+                    while (node) {
+                        if (node.kind === 207 /* ForInStatement */ &&
+                            child === node.statement &&
+                            getForInVariableSymbol(node) === symbol &&
+                            hasNumericPropertyNames(checkExpression(node.expression))) {
+                            return true;
+                        }
+                        child = node;
+                        node = node.parent;
+                    }
+                }
+            }
+            return false;
+        }
+        function checkIndexedAccess(node) {
+            // Grammar checking
+            if (!node.argumentExpression) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                if (node.parent.kind === 175 /* NewExpression */ && node.parent.expression === node) {
+                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
+                }
+                else {
+                    var start = node.end - "]".length;
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
+                }
+            }
+            // Obtain base constraint such that we can bail out if the constraint is an unknown type
+            var objectType = getApparentType(checkNonNullExpression(node.expression));
+            var indexType = node.argumentExpression ? checkExpression(node.argumentExpression) : unknownType;
+            if (objectType === unknownType) {
+                return unknownType;
+            }
+            var isConstEnum = isConstEnumObjectType(objectType);
+            if (isConstEnum &&
+                (!node.argumentExpression || node.argumentExpression.kind !== 9 /* StringLiteral */)) {
+                error(node.argumentExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
+                return unknownType;
+            }
+            // TypeScript 1.0 spec (April 2014): 4.10 Property Access
+            // - If IndexExpr is a string literal or a numeric literal and ObjExpr's apparent type has a property with the name
+            //    given by that literal(converted to its string representation in the case of a numeric literal), the property access is of the type of that property.
+            // - Otherwise, if ObjExpr's apparent type has a numeric index signature and IndexExpr is of type Any, the Number primitive type, or an enum type,
+            //    the property access is of the type of that index signature.
+            // - Otherwise, if ObjExpr's apparent type has a string index signature and IndexExpr is of type Any, the String or Number primitive type, or an enum type,
+            //    the property access is of the type of that index signature.
+            // - Otherwise, if IndexExpr is of type Any, the String or Number primitive type, or an enum type, the property access is of type Any.
+            // See if we can index as a property.
+            if (node.argumentExpression) {
+                var name_13 = getPropertyNameForIndexedAccess(node.argumentExpression, indexType);
+                if (name_13 !== undefined) {
+                    var prop = getPropertyOfType(objectType, name_13);
+                    if (prop) {
+                        getNodeLinks(node).resolvedSymbol = prop;
+                        return getTypeOfSymbol(prop);
+                    }
+                    else if (isConstEnum) {
+                        error(node.argumentExpression, ts.Diagnostics.Property_0_does_not_exist_on_const_enum_1, name_13, symbolToString(objectType.symbol));
+                        return unknownType;
+                    }
+                }
+            }
+            // Check for compatible indexer types.
+            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 258 /* StringLike */ | 132 /* NumberLike */ | 16777216 /* ESSymbol */)) {
+                // Try to use a number indexer.
+                if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 132 /* NumberLike */) || isForInVariableForNumericPropertyNames(node.argumentExpression)) {
+                    var numberIndexInfo = getIndexInfoOfType(objectType, 1 /* Number */);
+                    if (numberIndexInfo) {
+                        getNodeLinks(node).resolvedIndexInfo = numberIndexInfo;
+                        return numberIndexInfo.type;
+                    }
+                }
+                // Try to use string indexing.
+                var stringIndexInfo = getIndexInfoOfType(objectType, 0 /* String */);
+                if (stringIndexInfo) {
+                    getNodeLinks(node).resolvedIndexInfo = stringIndexInfo;
+                    return stringIndexInfo.type;
+                }
+                // Fall back to any.
+                if (compilerOptions.noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors && !isTypeAny(objectType)) {
+                    error(node, getIndexTypeOfType(objectType, 1 /* Number */) ?
+                        ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number :
+                        ts.Diagnostics.Index_signature_of_object_type_implicitly_has_an_any_type);
+                }
+                return anyType;
+            }
+            // REVIEW: Users should know the type that was actually used.
+            error(node, ts.Diagnostics.An_index_expression_argument_must_be_of_type_string_number_symbol_or_any);
+            return unknownType;
+        }
+        /**
+         * If indexArgumentExpression is a string literal or number literal, returns its text.
+         * If indexArgumentExpression is a constant value, returns its string value.
+         * If indexArgumentExpression is a well known symbol, returns the property name corresponding
+         *    to this symbol, as long as it is a proper symbol reference.
+         * Otherwise, returns undefined.
+         */
+        function getPropertyNameForIndexedAccess(indexArgumentExpression, indexArgumentType) {
+            if (indexArgumentExpression.kind === 9 /* StringLiteral */ || indexArgumentExpression.kind === 8 /* NumericLiteral */) {
+                return indexArgumentExpression.text;
+            }
+            if (indexArgumentExpression.kind === 173 /* ElementAccessExpression */ || indexArgumentExpression.kind === 172 /* PropertyAccessExpression */) {
+                var value = getConstantValue(indexArgumentExpression);
+                if (value !== undefined) {
+                    return value.toString();
+                }
+            }
+            if (checkThatExpressionIsProperSymbolReference(indexArgumentExpression, indexArgumentType, /*reportError*/ false)) {
+                var rightHandSideName = indexArgumentExpression.name.text;
+                return ts.getPropertyNameForKnownSymbolName(rightHandSideName);
+            }
+            return undefined;
+        }
+        /**
+         * A proper symbol reference requires the following:
+         *   1. The property access denotes a property that exists
+         *   2. The expression is of the form Symbol.<identifier>
+         *   3. The property access is of the primitive type symbol.
+         *   4. Symbol in this context resolves to the global Symbol object
+         */
+        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
+            if (expressionType === unknownType) {
+                // There is already an error, so no need to report one.
+                return false;
+            }
+            if (!ts.isWellKnownSymbolSyntactically(expression)) {
+                return false;
+            }
+            // Make sure the property type is the primitive symbol type
+            if ((expressionType.flags & 16777216 /* ESSymbol */) === 0) {
+                if (reportError) {
+                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
+                }
+                return false;
+            }
+            // The name is Symbol.<someName>, so make sure Symbol actually resolves to the
+            // global Symbol object
+            var leftHandSide = expression.expression;
+            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
+            if (!leftHandSideSymbol) {
+                return false;
+            }
+            var globalESSymbol = getGlobalESSymbolConstructorSymbol();
+            if (!globalESSymbol) {
+                // Already errored when we tried to look up the symbol
+                return false;
+            }
+            if (leftHandSideSymbol !== globalESSymbol) {
+                if (reportError) {
+                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
+                }
+                return false;
+            }
+            return true;
+        }
+        function resolveUntypedCall(node) {
+            if (node.kind === 176 /* TaggedTemplateExpression */) {
+                checkExpression(node.template);
+            }
+            else if (node.kind !== 143 /* Decorator */) {
+                ts.forEach(node.arguments, function (argument) {
+                    checkExpression(argument);
+                });
+            }
+            return anySignature;
+        }
+        function resolveErrorCall(node) {
+            resolveUntypedCall(node);
+            return unknownSignature;
+        }
+        // Re-order candidate signatures into the result array. Assumes the result array to be empty.
+        // The candidate list orders groups in reverse, but within a group signatures are kept in declaration order
+        // A nit here is that we reorder only signatures that belong to the same symbol,
+        // so order how inherited signatures are processed is still preserved.
+        // interface A { (x: string): void }
+        // interface B extends A { (x: 'foo'): string }
+        // const b: B;
+        // b('foo') // <- here overloads should be processed as [(x:'foo'): string, (x: string): void]
+        function reorderCandidates(signatures, result) {
+            var lastParent;
+            var lastSymbol;
+            var cutoffIndex = 0;
+            var index;
+            var specializedIndex = -1;
+            var spliceIndex;
+            ts.Debug.assert(!result.length);
+            for (var _i = 0, signatures_2 = signatures; _i < signatures_2.length; _i++) {
+                var signature = signatures_2[_i];
+                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
+                var parent_9 = signature.declaration && signature.declaration.parent;
+                if (!lastSymbol || symbol === lastSymbol) {
+                    if (lastParent && parent_9 === lastParent) {
+                        index++;
+                    }
+                    else {
+                        lastParent = parent_9;
+                        index = cutoffIndex;
+                    }
+                }
+                else {
+                    // current declaration belongs to a different symbol
+                    // set cutoffIndex so re-orderings in the future won't change result set from 0 to cutoffIndex
+                    index = cutoffIndex = result.length;
+                    lastParent = parent_9;
+                }
+                lastSymbol = symbol;
+                // specialized signatures always need to be placed before non-specialized signatures regardless
+                // of the cutoff position; see GH#1133
+                if (signature.hasStringLiterals) {
+                    specializedIndex++;
+                    spliceIndex = specializedIndex;
+                    // The cutoff index always needs to be greater than or equal to the specialized signature index
+                    // in order to prevent non-specialized signatures from being added before a specialized
+                    // signature.
+                    cutoffIndex++;
+                }
+                else {
+                    spliceIndex = index;
+                }
+                result.splice(spliceIndex, 0, signature);
+            }
+        }
+        function getSpreadArgumentIndex(args) {
+            for (var i = 0; i < args.length; i++) {
+                var arg = args[i];
+                if (arg && arg.kind === 191 /* SpreadElementExpression */) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+        function hasCorrectArity(node, args, signature, signatureHelpTrailingComma) {
+            if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+            var argCount; // Apparent number of arguments we will have in this call
+            var typeArguments; // Type arguments (undefined if none)
+            var callIsIncomplete; // In incomplete call we want to be lenient when we have too few arguments
+            var isDecorator;
+            var spreadArgIndex = -1;
+            if (node.kind === 176 /* TaggedTemplateExpression */) {
+                var tagExpression = node;
+                // Even if the call is incomplete, we'll have a missing expression as our last argument,
+                // so we can say the count is just the arg list length
+                argCount = args.length;
+                typeArguments = undefined;
+                if (tagExpression.template.kind === 189 /* TemplateExpression */) {
+                    // If a tagged template expression lacks a tail literal, the call is incomplete.
+                    // Specifically, a template only can end in a TemplateTail or a Missing literal.
+                    var templateExpression = tagExpression.template;
+                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
+                    ts.Debug.assert(lastSpan !== undefined); // we should always have at least one span.
+                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
+                }
+                else {
+                    // If the template didn't end in a backtick, or its beginning occurred right prior to EOF,
+                    // then this might actually turn out to be a TemplateHead in the future;
+                    // so we consider the call to be incomplete.
+                    var templateLiteral = tagExpression.template;
+                    ts.Debug.assert(templateLiteral.kind === 11 /* NoSubstitutionTemplateLiteral */);
+                    callIsIncomplete = !!templateLiteral.isUnterminated;
+                }
+            }
+            else if (node.kind === 143 /* Decorator */) {
+                isDecorator = true;
+                typeArguments = undefined;
+                argCount = getEffectiveArgumentCount(node, /*args*/ undefined, signature);
+            }
+            else {
+                var callExpression = node;
+                if (!callExpression.arguments) {
+                    // This only happens when we have something of the form: 'new C'
+                    ts.Debug.assert(callExpression.kind === 175 /* NewExpression */);
+                    return signature.minArgumentCount === 0;
+                }
+                argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
+                // If we are missing the close paren, the call is incomplete.
+                callIsIncomplete = callExpression.arguments.end === callExpression.end;
+                typeArguments = callExpression.typeArguments;
+                spreadArgIndex = getSpreadArgumentIndex(args);
+            }
+            // If the user supplied type arguments, but the number of type arguments does not match
+            // the declared number of type parameters, the call has an incorrect arity.
+            var hasRightNumberOfTypeArgs = !typeArguments ||
+                (signature.typeParameters && typeArguments.length === signature.typeParameters.length);
+            if (!hasRightNumberOfTypeArgs) {
+                return false;
+            }
+            // If spread arguments are present, check that they correspond to a rest parameter. If so, no
+            // further checking is necessary.
+            if (spreadArgIndex >= 0) {
+                return isRestParameterIndex(signature, spreadArgIndex);
+            }
+            // Too many arguments implies incorrect arity.
+            if (!signature.hasRestParameter && argCount > signature.parameters.length) {
+                return false;
+            }
+            // If the call is incomplete, we should skip the lower bound check.
+            var hasEnoughArguments = argCount >= signature.minArgumentCount;
+            return callIsIncomplete || hasEnoughArguments;
+        }
+        // If type has a single call signature and no other members, return that signature. Otherwise, return undefined.
+        function getSingleCallSignature(type) {
+            if (type.flags & 80896 /* ObjectType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
+                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                    return resolved.callSignatures[0];
+                }
+            }
+            return undefined;
+        }
+        // Instantiate a generic signature in the context of a non-generic signature (section 3.8.5 in TypeScript spec)
+        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
+            var context = createInferenceContext(signature.typeParameters, /*inferUnionTypes*/ true);
+            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
+                // Type parameters from outer context referenced by source type are fixed by instantiation of the source type
+                inferTypes(context, instantiateType(source, contextualMapper), target);
+            });
+            return getSignatureInstantiation(signature, getInferredTypes(context));
+        }
+        function inferTypeArguments(node, signature, args, excludeArgument, context) {
+            var typeParameters = signature.typeParameters;
+            var inferenceMapper = getInferenceMapper(context);
+            // Clear out all the inference results from the last time inferTypeArguments was called on this context
+            for (var i = 0; i < typeParameters.length; i++) {
+                // As an optimization, we don't have to clear (and later recompute) inferred types
+                // for type parameters that have already been fixed on the previous call to inferTypeArguments.
+                // It would be just as correct to reset all of them. But then we'd be repeating the same work
+                // for the type parameters that were fixed, namely the work done by getInferredType.
+                if (!context.inferences[i].isFixed) {
+                    context.inferredTypes[i] = undefined;
+                }
+            }
+            // On this call to inferTypeArguments, we may get more inferences for certain type parameters that were not
+            // fixed last time. This means that a type parameter that failed inference last time may succeed this time,
+            // or vice versa. Therefore, the failedTypeParameterIndex is useless if it points to an unfixed type parameter,
+            // because it may change. So here we reset it. However, getInferredType will not revisit any type parameters
+            // that were previously fixed. So if a fixed type parameter failed previously, it will fail again because
+            // it will contain the exact same set of inferences. So if we reset the index from a fixed type parameter,
+            // we will lose information that we won't recover this time around.
+            if (context.failedTypeParameterIndex !== undefined && !context.inferences[context.failedTypeParameterIndex].isFixed) {
+                context.failedTypeParameterIndex = undefined;
+            }
+            if (signature.thisType) {
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                inferTypes(context, thisArgumentType, signature.thisType);
+            }
+            // We perform two passes over the arguments. In the first pass we infer from all arguments, but use
+            // wildcards for all context sensitive function expressions.
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
+                if (arg === undefined || arg.kind !== 193 /* OmittedExpression */) {
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i, arg);
+                    // If the effective argument type is 'undefined', there is no synthetic type
+                    // for the argument. In that case, we should check the argument.
+                    if (argType === undefined) {
+                        // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
+                        // context sensitive function expressions as wildcards
+                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : inferenceMapper;
+                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
+                    }
+                    inferTypes(context, argType, paramType);
+                }
+            }
+            // In the second pass we visit only context sensitive arguments, and only those that aren't excluded, this
+            // time treating function expressions normally (which may cause previously inferred type arguments to be fixed
+            // as we construct types for contextually typed parameters)
+            // Decorators will not have `excludeArgument`, as their arguments cannot be contextually typed.
+            // Tagged template expressions will always have `undefined` for `excludeArgument[0]`.
+            if (excludeArgument) {
+                for (var i = 0; i < argCount; i++) {
+                    // No need to check for omitted args and template expressions, their exclusion value is always undefined
+                    if (excludeArgument[i] === false) {
+                        var arg = args[i];
+                        var paramType = getTypeAtPosition(signature, i);
+                        inferTypes(context, checkExpressionWithContextualType(arg, paramType, inferenceMapper), paramType);
+                    }
+                }
+            }
+            getInferredTypes(context);
+        }
+        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
+            var typeParameters = signature.typeParameters;
+            var typeArgumentsAreAssignable = true;
+            var mapper;
+            for (var i = 0; i < typeParameters.length; i++) {
+                if (typeArgumentsAreAssignable /* so far */) {
+                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                    if (constraint) {
+                        var errorInfo = void 0;
+                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
+                        if (reportErrors && headMessage) {
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
+                            typeArgumentHeadMessage = headMessage;
+                        }
+                        if (!mapper) {
+                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
+                        }
+                        var typeArgument = typeArgumentTypes[i];
+                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
+                    }
+                }
+            }
+            return typeArgumentsAreAssignable;
+        }
+        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
+            if (signature.thisType && signature.thisType !== voidType && node.kind !== 175 /* NewExpression */) {
+                // If the called expression is not of the form `x.f` or `x["f"]`, then sourceType = voidType
+                // If the signature's 'this' type is voidType, then the check is skipped -- anything is compatible.
+                // If the expression is a new expression, then the check is skipped.
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
+                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
+                if (!checkTypeRelatedTo(thisArgumentType, signature.thisType, relation, errorNode, headMessage_1)) {
+                    return false;
+                }
+            }
+            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
+                if (arg === undefined || arg.kind !== 193 /* OmittedExpression */) {
+                    // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i, arg);
+                    // If the effective argument type is 'undefined', there is no synthetic type
+                    // for the argument. In that case, we should check the argument.
+                    if (argType === undefined) {
+                        argType = arg.kind === 9 /* StringLiteral */ && !reportErrors
+                            ? getStringLiteralTypeForText(arg.text)
+                            : checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
+                    }
+                    // Use argument expression as error location when reporting errors
+                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
+                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        /**
+         * Returns the this argument in calls like x.f(...) and x[f](...). Undefined otherwise.
+         */
+        function getThisArgumentOfCall(node) {
+            if (node.kind === 174 /* CallExpression */) {
+                var callee = node.expression;
+                if (callee.kind === 172 /* PropertyAccessExpression */) {
+                    return callee.expression;
+                }
+                else if (callee.kind === 173 /* ElementAccessExpression */) {
+                    return callee.expression;
+                }
+            }
+        }
+        /**
+         * Returns the effective arguments for an expression that works like a function invocation.
+         *
+         * If 'node' is a CallExpression or a NewExpression, then its argument list is returned.
+         * If 'node' is a TaggedTemplateExpression, a new argument list is constructed from the substitution
+         *    expressions, where the first element of the list is `undefined`.
+         * If 'node' is a Decorator, the argument list will be `undefined`, and its arguments and types
+         *    will be supplied from calls to `getEffectiveArgumentCount` and `getEffectiveArgumentType`.
+         */
+        function getEffectiveCallArguments(node) {
+            var args;
+            if (node.kind === 176 /* TaggedTemplateExpression */) {
+                var template = node.template;
+                args = [undefined];
+                if (template.kind === 189 /* TemplateExpression */) {
+                    ts.forEach(template.templateSpans, function (span) {
+                        args.push(span.expression);
+                    });
+                }
+            }
+            else if (node.kind === 143 /* Decorator */) {
+                // For a decorator, we return undefined as we will determine
+                // the number and types of arguments for a decorator using
+                // `getEffectiveArgumentCount` and `getEffectiveArgumentType` below.
+                return undefined;
+            }
+            else {
+                args = node.arguments || emptyArray;
+            }
+            return args;
+        }
+        /**
+          * Returns the effective argument count for a node that works like a function invocation.
+          * If 'node' is a Decorator, the number of arguments is derived from the decoration
+          *    target and the signature:
+          *    If 'node.target' is a class declaration or class expression, the effective argument
+          *       count is 1.
+          *    If 'node.target' is a parameter declaration, the effective argument count is 3.
+          *    If 'node.target' is a property declaration, the effective argument count is 2.
+          *    If 'node.target' is a method or accessor declaration, the effective argument count
+          *       is 3, although it can be 2 if the signature only accepts two arguments, allowing
+          *       us to match a property decorator.
+          * Otherwise, the argument count is the length of the 'args' array.
+          */
+        function getEffectiveArgumentCount(node, args, signature) {
+            if (node.kind === 143 /* Decorator */) {
+                switch (node.parent.kind) {
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                        // A class decorator will have one argument (see `ClassDecorator` in core.d.ts)
+                        return 1;
+                    case 145 /* PropertyDeclaration */:
+                        // A property declaration decorator will have two arguments (see
+                        // `PropertyDecorator` in core.d.ts)
+                        return 2;
+                    case 147 /* MethodDeclaration */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        // A method or accessor declaration decorator will have two or three arguments (see
+                        // `PropertyDecorator` and `MethodDecorator` in core.d.ts)
+                        // If we are emitting decorators for ES3, we will only pass two arguments.
+                        if (languageVersion === 0 /* ES3 */) {
+                            return 2;
+                        }
+                        // If the method decorator signature only accepts a target and a key, we will only
+                        // type check those arguments.
+                        return signature.parameters.length >= 3 ? 3 : 2;
+                    case 142 /* Parameter */:
+                        // A parameter declaration decorator will have three arguments (see
+                        // `ParameterDecorator` in core.d.ts)
+                        return 3;
+                }
+            }
+            else {
+                return args.length;
+            }
+        }
+        /**
+          * Returns the effective type of the first argument to a decorator.
+          * If 'node' is a class declaration or class expression, the effective argument type
+          *    is the type of the static side of the class.
+          * If 'node' is a parameter declaration, the effective argument type is either the type
+          *    of the static or instance side of the class for the parameter's parent method,
+          *    depending on whether the method is declared static.
+          *    For a constructor, the type is always the type of the static side of the class.
+          * If 'node' is a property, method, or accessor declaration, the effective argument
+          *    type is the type of the static or instance side of the parent class for class
+          *    element, depending on whether the element is declared static.
+          */
+        function getEffectiveDecoratorFirstArgumentType(node) {
+            // The first argument to a decorator is its `target`.
+            if (node.kind === 221 /* ClassDeclaration */) {
+                // For a class decorator, the `target` is the type of the class (e.g. the
+                // "static" or "constructor" side of the class)
+                var classSymbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(classSymbol);
+            }
+            if (node.kind === 142 /* Parameter */) {
+                // For a parameter decorator, the `target` is the parent type of the
+                // parameter's containing method.
+                node = node.parent;
+                if (node.kind === 148 /* Constructor */) {
+                    var classSymbol = getSymbolOfNode(node);
+                    return getTypeOfSymbol(classSymbol);
+                }
+            }
+            if (node.kind === 145 /* PropertyDeclaration */ ||
+                node.kind === 147 /* MethodDeclaration */ ||
+                node.kind === 149 /* GetAccessor */ ||
+                node.kind === 150 /* SetAccessor */) {
+                // For a property or method decorator, the `target` is the
+                // "static"-side type of the parent of the member if the member is
+                // declared "static"; otherwise, it is the "instance"-side type of the
+                // parent of the member.
+                return getParentTypeOfClassElement(node);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        /**
+          * Returns the effective type for the second argument to a decorator.
+          * If 'node' is a parameter, its effective argument type is one of the following:
+          *    If 'node.parent' is a constructor, the effective argument type is 'any', as we
+          *       will emit `undefined`.
+          *    If 'node.parent' is a member with an identifier, numeric, or string literal name,
+          *       the effective argument type will be a string literal type for the member name.
+          *    If 'node.parent' is a computed property name, the effective argument type will
+          *       either be a symbol type or the string type.
+          * If 'node' is a member with an identifier, numeric, or string literal name, the
+          *    effective argument type will be a string literal type for the member name.
+          * If 'node' is a computed property name, the effective argument type will either
+          *    be a symbol type or the string type.
+          * A class decorator does not have a second argument type.
+          */
+        function getEffectiveDecoratorSecondArgumentType(node) {
+            // The second argument to a decorator is its `propertyKey`
+            if (node.kind === 221 /* ClassDeclaration */) {
+                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 142 /* Parameter */) {
+                node = node.parent;
+                if (node.kind === 148 /* Constructor */) {
+                    // For a constructor parameter decorator, the `propertyKey` will be `undefined`.
+                    return anyType;
+                }
+            }
+            if (node.kind === 145 /* PropertyDeclaration */ ||
+                node.kind === 147 /* MethodDeclaration */ ||
+                node.kind === 149 /* GetAccessor */ ||
+                node.kind === 150 /* SetAccessor */) {
+                // The `propertyKey` for a property or method decorator will be a
+                // string literal type if the member name is an identifier, number, or string;
+                // otherwise, if the member name is a computed property name it will
+                // be either string or symbol.
+                var element = node;
+                switch (element.name.kind) {
+                    case 69 /* Identifier */:
+                    case 8 /* NumericLiteral */:
+                    case 9 /* StringLiteral */:
+                        return getStringLiteralTypeForText(element.name.text);
+                    case 140 /* ComputedPropertyName */:
+                        var nameType = checkComputedPropertyName(element.name);
+                        if (isTypeOfKind(nameType, 16777216 /* ESSymbol */)) {
+                            return nameType;
+                        }
+                        else {
+                            return stringType;
+                        }
+                    default:
+                        ts.Debug.fail("Unsupported property name.");
+                        return unknownType;
+                }
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        /**
+          * Returns the effective argument type for the third argument to a decorator.
+          * If 'node' is a parameter, the effective argument type is the number type.
+          * If 'node' is a method or accessor, the effective argument type is a
+          *    `TypedPropertyDescriptor<T>` instantiated with the type of the member.
+          * Class and property decorators do not have a third effective argument.
+          */
+        function getEffectiveDecoratorThirdArgumentType(node) {
+            // The third argument to a decorator is either its `descriptor` for a method decorator
+            // or its `parameterIndex` for a parameter decorator
+            if (node.kind === 221 /* ClassDeclaration */) {
+                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 142 /* Parameter */) {
+                // The `parameterIndex` for a parameter decorator is always a number
+                return numberType;
+            }
+            if (node.kind === 145 /* PropertyDeclaration */) {
+                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 147 /* MethodDeclaration */ ||
+                node.kind === 149 /* GetAccessor */ ||
+                node.kind === 150 /* SetAccessor */) {
+                // The `descriptor` for a method decorator will be a `TypedPropertyDescriptor<T>`
+                // for the type of the member.
+                var propertyType = getTypeOfNode(node);
+                return createTypedPropertyDescriptorType(propertyType);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        /**
+          * Returns the effective argument type for the provided argument to a decorator.
+          */
+        function getEffectiveDecoratorArgumentType(node, argIndex) {
+            if (argIndex === 0) {
+                return getEffectiveDecoratorFirstArgumentType(node.parent);
+            }
+            else if (argIndex === 1) {
+                return getEffectiveDecoratorSecondArgumentType(node.parent);
+            }
+            else if (argIndex === 2) {
+                return getEffectiveDecoratorThirdArgumentType(node.parent);
+            }
+            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
+            return unknownType;
+        }
+        /**
+          * Gets the effective argument type for an argument in a call expression.
+          */
+        function getEffectiveArgumentType(node, argIndex, arg) {
+            // Decorators provide special arguments, a tagged template expression provides
+            // a special first argument, and string literals get string literal types
+            // unless we're reporting errors
+            if (node.kind === 143 /* Decorator */) {
+                return getEffectiveDecoratorArgumentType(node, argIndex);
+            }
+            else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) {
+                return getGlobalTemplateStringsArrayType();
+            }
+            // This is not a synthetic argument, so we return 'undefined'
+            // to signal that the caller needs to check the argument.
+            return undefined;
+        }
+        /**
+          * Gets the effective argument expression for an argument in a call expression.
+          */
+        function getEffectiveArgument(node, args, argIndex) {
+            // For a decorator or the first argument of a tagged template expression we return undefined.
+            if (node.kind === 143 /* Decorator */ ||
+                (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */)) {
+                return undefined;
+            }
+            return args[argIndex];
+        }
+        /**
+          * Gets the error node to use when reporting errors for an effective argument.
+          */
+        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
+            if (node.kind === 143 /* Decorator */) {
+                // For a decorator, we use the expression of the decorator for error reporting.
+                return node.expression;
+            }
+            else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) {
+                // For a the first argument of a tagged template expression, we use the template of the tag for error reporting.
+                return node.template;
+            }
+            else {
+                return arg;
+            }
+        }
+        function resolveCall(node, signatures, candidatesOutArray, headMessage) {
+            var isTaggedTemplate = node.kind === 176 /* TaggedTemplateExpression */;
+            var isDecorator = node.kind === 143 /* Decorator */;
+            var typeArguments;
+            if (!isTaggedTemplate && !isDecorator) {
+                typeArguments = node.typeArguments;
+                // We already perform checking on the type arguments on the class declaration itself.
+                if (node.expression.kind !== 95 /* SuperKeyword */) {
+                    ts.forEach(typeArguments, checkSourceElement);
+                }
+            }
+            var candidates = candidatesOutArray || [];
+            // reorderCandidates fills up the candidates array directly
+            reorderCandidates(signatures, candidates);
+            if (!candidates.length) {
+                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+                return resolveErrorCall(node);
+            }
+            var args = getEffectiveCallArguments(node);
+            // The following applies to any value of 'excludeArgument[i]':
+            //    - true:      the argument at 'i' is susceptible to a one-time permanent contextual typing.
+            //    - undefined: the argument at 'i' is *not* susceptible to permanent contextual typing.
+            //    - false:     the argument at 'i' *was* and *has been* permanently contextually typed.
+            //
+            // The idea is that we will perform type argument inference & assignability checking once
+            // without using the susceptible parameters that are functions, and once more for each of those
+            // parameters, contextually typing each as we go along.
+            //
+            // For a tagged template, then the first argument be 'undefined' if necessary
+            // because it represents a TemplateStringsArray.
+            //
+            // For a decorator, no arguments are susceptible to contextual typing due to the fact
+            // decorators are applied to a declaration by the emitter, and not to an expression.
+            var excludeArgument;
+            if (!isDecorator) {
+                // We do not need to call `getEffectiveArgumentCount` here as it only
+                // applies when calculating the number of arguments for a decorator.
+                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
+                    if (isContextSensitive(args[i])) {
+                        if (!excludeArgument) {
+                            excludeArgument = new Array(args.length);
+                        }
+                        excludeArgument[i] = true;
+                    }
+                }
+            }
+            // The following variables are captured and modified by calls to chooseOverload.
+            // If overload resolution or type argument inference fails, we want to report the
+            // best error possible. The best error is one which says that an argument was not
+            // assignable to a parameter. This implies that everything else about the overload
+            // was fine. So if there is any overload that is only incorrect because of an
+            // argument, we will report an error on that one.
+            //
+            //     function foo(s: string) {}
+            //     function foo(n: number) {} // Report argument error on this overload
+            //     function foo() {}
+            //     foo(true);
+            //
+            // If none of the overloads even made it that far, there are two possibilities.
+            // There was a problem with type arguments for some overload, in which case
+            // report an error on that. Or none of the overloads even had correct arity,
+            // in which case give an arity error.
+            //
+            //     function foo<T>(x: T, y: T) {} // Report type argument inference error
+            //     function foo() {}
+            //     foo(0, true);
+            //
+            var candidateForArgumentError;
+            var candidateForTypeArgumentError;
+            var resultOfFailedInference;
+            var result;
+            // If we are in signature help, a trailing comma indicates that we intend to provide another argument,
+            // so we will only accept overloads with arity at least 1 higher than the current number of provided arguments.
+            var signatureHelpTrailingComma = candidatesOutArray && node.kind === 174 /* CallExpression */ && node.arguments.hasTrailingComma;
+            // Section 4.12.1:
+            // if the candidate list contains one or more signatures for which the type of each argument
+            // expression is a subtype of each corresponding parameter type, the return type of the first
+            // of those signatures becomes the return type of the function call.
+            // Otherwise, the return type of the first signature in the candidate list becomes the return
+            // type of the function call.
+            //
+            // Whether the call is an error is determined by assignability of the arguments. The subtype pass
+            // is just important for choosing the best signature. So in the case where there is only one
+            // signature, the subtype pass is useless. So skipping it is an optimization.
+            if (candidates.length > 1) {
+                result = chooseOverload(candidates, subtypeRelation, signatureHelpTrailingComma);
+            }
+            if (!result) {
+                // Reinitialize these pointers for round two
+                candidateForArgumentError = undefined;
+                candidateForTypeArgumentError = undefined;
+                resultOfFailedInference = undefined;
+                result = chooseOverload(candidates, assignableRelation, signatureHelpTrailingComma);
+            }
+            if (result) {
+                return result;
+            }
+            // No signatures were applicable. Now report errors based on the last applicable signature with
+            // no arguments excluded from assignability checks.
+            // If candidate is undefined, it means that no candidates had a suitable arity. In that case,
+            // skip the checkApplicableSignature check.
+            if (candidateForArgumentError) {
+                // excludeArgument is undefined, in this case also equivalent to [undefined, undefined, ...]
+                // The importance of excludeArgument is to prevent us from typing function expression parameters
+                // in arguments too early. If possible, we'd like to only type them once we know the correct
+                // overload. However, this matters for the case where the call is correct. When the call is
+                // an error, we don't need to exclude any arguments, although it would cause no harm to do so.
+                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, /*excludeArgument*/ undefined, /*reportErrors*/ true);
+            }
+            else if (candidateForTypeArgumentError) {
+                if (!isTaggedTemplate && !isDecorator && typeArguments) {
+                    var typeArguments_2 = node.typeArguments;
+                    checkTypeArguments(candidateForTypeArgumentError, typeArguments_2, ts.map(typeArguments_2, getTypeFromTypeNode), /*reportErrors*/ true, headMessage);
+                }
+                else {
+                    ts.Debug.assert(resultOfFailedInference.failedTypeParameterIndex >= 0);
+                    var failedTypeParameter = candidateForTypeArgumentError.typeParameters[resultOfFailedInference.failedTypeParameterIndex];
+                    var inferenceCandidates = getInferenceCandidates(resultOfFailedInference, resultOfFailedInference.failedTypeParameterIndex);
+                    var diagnosticChainHead = ts.chainDiagnosticMessages(/*details*/ undefined, // details will be provided by call to reportNoCommonSupertypeError
+                    ts.Diagnostics.The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly, typeToString(failedTypeParameter));
+                    if (headMessage) {
+                        diagnosticChainHead = ts.chainDiagnosticMessages(diagnosticChainHead, headMessage);
+                    }
+                    reportNoCommonSupertypeError(inferenceCandidates, node.expression || node.tag, diagnosticChainHead);
+                }
+            }
+            else {
+                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+            }
+            // No signature was applicable. We have already reported the errors for the invalid signature.
+            // If this is a type resolution session, e.g. Language Service, try to get better information that anySignature.
+            // Pick the first candidate that matches the arity. This way we can get a contextual type for cases like:
+            //  declare function f(a: { xa: number; xb: number; });
+            //  f({ |
+            if (!produceDiagnostics) {
+                for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
+                    var candidate = candidates_1[_i];
+                    if (hasCorrectArity(node, args, candidate)) {
+                        if (candidate.typeParameters && typeArguments) {
+                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNode));
+                        }
+                        return candidate;
+                    }
+                }
+            }
+            return resolveErrorCall(node);
+            function reportError(message, arg0, arg1, arg2) {
+                var errorInfo;
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+                if (headMessage) {
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
+                }
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+            }
+            function chooseOverload(candidates, relation, signatureHelpTrailingComma) {
+                if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
+                    var originalCandidate = candidates_2[_i];
+                    if (!hasCorrectArity(node, args, originalCandidate, signatureHelpTrailingComma)) {
+                        continue;
+                    }
+                    var candidate = void 0;
+                    var typeArgumentsAreValid = void 0;
+                    var inferenceContext = originalCandidate.typeParameters
+                        ? createInferenceContext(originalCandidate.typeParameters, /*inferUnionTypes*/ false)
+                        : undefined;
+                    while (true) {
+                        candidate = originalCandidate;
+                        if (candidate.typeParameters) {
+                            var typeArgumentTypes = void 0;
+                            if (typeArguments) {
+                                typeArgumentTypes = ts.map(typeArguments, getTypeFromTypeNode);
+                                typeArgumentsAreValid = checkTypeArguments(candidate, typeArguments, typeArgumentTypes, /*reportErrors*/ false);
+                            }
+                            else {
+                                inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
+                                typeArgumentsAreValid = inferenceContext.failedTypeParameterIndex === undefined;
+                                typeArgumentTypes = inferenceContext.inferredTypes;
+                            }
+                            if (!typeArgumentsAreValid) {
+                                break;
+                            }
+                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
+                        }
+                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, /*reportErrors*/ false)) {
+                            break;
+                        }
+                        var index = excludeArgument ? ts.indexOf(excludeArgument, true) : -1;
+                        if (index < 0) {
+                            return candidate;
+                        }
+                        excludeArgument[index] = false;
+                    }
+                    // A post-mortem of this iteration of the loop. The signature was not applicable,
+                    // so we want to track it as a candidate for reporting an error. If the candidate
+                    // had no type parameters, or had no issues related to type arguments, we can
+                    // report an error based on the arguments. If there was an issue with type
+                    // arguments, then we can only report an error based on the type arguments.
+                    if (originalCandidate.typeParameters) {
+                        var instantiatedCandidate = candidate;
+                        if (typeArgumentsAreValid) {
+                            candidateForArgumentError = instantiatedCandidate;
+                        }
+                        else {
+                            candidateForTypeArgumentError = originalCandidate;
+                            if (!typeArguments) {
+                                resultOfFailedInference = inferenceContext;
+                            }
+                        }
+                    }
+                    else {
+                        ts.Debug.assert(originalCandidate === candidate);
+                        candidateForArgumentError = originalCandidate;
+                    }
+                }
+                return undefined;
+            }
+        }
+        function resolveCallExpression(node, candidatesOutArray) {
+            if (node.expression.kind === 95 /* SuperKeyword */) {
+                var superType = checkSuperExpression(node.expression);
+                if (superType !== unknownType) {
+                    // In super call, the candidate signatures are the matching arity signatures of the base constructor function instantiated
+                    // with the type arguments specified in the extends clause.
+                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
+                    if (baseTypeNode) {
+                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments);
+                        return resolveCall(node, baseConstructors, candidatesOutArray);
+                    }
+                }
+                return resolveUntypedCall(node);
+            }
+            var funcType = checkNonNullExpression(node.expression);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
+            }
+            // Technically, this signatures list may be incomplete. We are taking the apparent type,
+            // but we are not including call signatures that may have been added to the Object or
+            // Function interface, since they have none by default. This is a bit of a leap of faith
+            // that the user will not add any.
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
+            // TS 1.0 spec: 4.12
+            // If FuncExpr is of type Any, or of an object type that has no call or construct signatures
+            // but is a subtype of the Function interface, the call is an untyped function call. In an
+            // untyped function call no TypeArgs are permitted, Args can be any argument list, no contextual
+            // types are provided for the argument expressions, and the result is always of type Any.
+            // We exclude union types because we may have a union of function types that happen to have
+            // no common signatures.
+            if (isTypeAny(funcType) ||
+                (isTypeAny(apparentType) && funcType.flags & 512 /* TypeParameter */) ||
+                (!callSignatures.length && !constructSignatures.length && !(funcType.flags & 16384 /* Union */) && isTypeAssignableTo(funcType, globalFunctionType))) {
+                // The unknownType indicates that an error already occurred (and was reported).  No
+                // need to report another error in this case.
+                if (funcType !== unknownType && node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+                }
+                return resolveUntypedCall(node);
+            }
+            // If FuncExpr's apparent type(section 3.8.1) is a function type, the call is a typed function call.
+            // TypeScript employs overload resolution in typed function calls in order to support functions
+            // with multiple call signatures.
+            if (!callSignatures.length) {
+                if (constructSignatures.length) {
+                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
+                }
+                else {
+                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                }
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray);
+        }
+        function resolveNewExpression(node, candidatesOutArray) {
+            if (node.arguments && languageVersion < 1 /* ES5 */) {
+                var spreadIndex = getSpreadArgumentIndex(node.arguments);
+                if (spreadIndex >= 0) {
+                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
+                }
+            }
+            var expressionType = checkNonNullExpression(node.expression);
+            // If expressionType's apparent type(section 3.8.1) is an object type with one or
+            // more construct signatures, the expression is processed in the same manner as a
+            // function call, but using the construct signatures as the initial set of candidate
+            // signatures for overload resolution. The result type of the function call becomes
+            // the result type of the operation.
+            expressionType = getApparentType(expressionType);
+            if (expressionType === unknownType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
+            }
+            // If the expression is a class of abstract type, then it cannot be instantiated.
+            // Note, only class declarations can be declared abstract.
+            // In the case of a merged class-module or class-interface declaration,
+            // only the class declaration node will have the Abstract flag set.
+            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
+            if (valueDecl && valueDecl.flags & 128 /* Abstract */) {
+                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
+                return resolveErrorCall(node);
+            }
+            // TS 1.0 spec: 4.11
+            // If expressionType is of type Any, Args can be any argument
+            // list and the result of the operation is of type Any.
+            if (isTypeAny(expressionType)) {
+                if (node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+                }
+                return resolveUntypedCall(node);
+            }
+            // Technically, this signatures list may be incomplete. We are taking the apparent type,
+            // but we are not including construct signatures that may have been added to the Object or
+            // Function interface, since they have none by default. This is a bit of a leap of faith
+            // that the user will not add any.
+            var constructSignatures = getSignaturesOfType(expressionType, 1 /* Construct */);
+            if (constructSignatures.length) {
+                if (!isConstructorAccessible(node, constructSignatures[0])) {
+                    return resolveErrorCall(node);
+                }
+                return resolveCall(node, constructSignatures, candidatesOutArray);
+            }
+            // If expressionType's apparent type is an object type with no construct signatures but
+            // one or more call signatures, the expression is processed as a function call. A compile-time
+            // error occurs if the result of the function call is not Void. The type of the result of the
+            // operation is Any. It is an error to have a Void this type.
+            var callSignatures = getSignaturesOfType(expressionType, 0 /* Call */);
+            if (callSignatures.length) {
+                var signature = resolveCall(node, callSignatures, candidatesOutArray);
+                if (getReturnTypeOfSignature(signature) !== voidType) {
+                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
+                }
+                if (signature.thisType === voidType) {
+                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
+                }
+                return signature;
+            }
+            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
+            return resolveErrorCall(node);
+        }
+        function isConstructorAccessible(node, signature) {
+            if (!signature || !signature.declaration) {
+                return true;
+            }
+            var declaration = signature.declaration;
+            var flags = declaration.flags;
+            // Public constructor is accessible.
+            if (!(flags & (8 /* Private */ | 16 /* Protected */))) {
+                return true;
+            }
+            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
+            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
+            // A private or protected constructor can only be instantiated within it's own class
+            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                if (flags & 8 /* Private */) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                if (flags & 16 /* Protected */) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                return false;
+            }
+            return true;
+        }
+        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
+            var tagType = checkExpression(node.tag);
+            var apparentType = getApparentType(tagType);
+            if (apparentType === unknownType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            if (isTypeAny(tagType) || (!callSignatures.length && !(tagType.flags & 16384 /* Union */) && isTypeAssignableTo(tagType, globalFunctionType))) {
+                return resolveUntypedCall(node);
+            }
+            if (!callSignatures.length) {
+                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray);
+        }
+        /**
+          * Gets the localized diagnostic head message to use for errors when resolving a decorator as a call expression.
+          */
+        function getDiagnosticHeadMessageForDecoratorResolution(node) {
+            switch (node.parent.kind) {
+                case 221 /* ClassDeclaration */:
+                case 192 /* ClassExpression */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
+                case 142 /* Parameter */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
+                case 145 /* PropertyDeclaration */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
+                case 147 /* MethodDeclaration */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
+            }
+        }
+        /**
+          * Resolves a decorator as if it were a call expression.
+          */
+        function resolveDecorator(node, candidatesOutArray) {
+            var funcType = checkExpression(node.expression);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            if (funcType === anyType || (!callSignatures.length && !(funcType.flags & 16384 /* Union */) && isTypeAssignableTo(funcType, globalFunctionType))) {
+                return resolveUntypedCall(node);
+            }
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            if (!callSignatures.length) {
+                var errorInfo = void 0;
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
+        }
+        function resolveSignature(node, candidatesOutArray) {
+            switch (node.kind) {
+                case 174 /* CallExpression */:
+                    return resolveCallExpression(node, candidatesOutArray);
+                case 175 /* NewExpression */:
+                    return resolveNewExpression(node, candidatesOutArray);
+                case 176 /* TaggedTemplateExpression */:
+                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
+                case 143 /* Decorator */:
+                    return resolveDecorator(node, candidatesOutArray);
+            }
+            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
+        }
+        // candidatesOutArray is passed by signature help in the language service, and collectCandidates
+        // must fill it up with the appropriate candidate signatures
+        function getResolvedSignature(node, candidatesOutArray) {
+            var links = getNodeLinks(node);
+            // If getResolvedSignature has already been called, we will have cached the resolvedSignature.
+            // However, it is possible that either candidatesOutArray was not passed in the first time,
+            // or that a different candidatesOutArray was passed in. Therefore, we need to redo the work
+            // to correctly fill the candidatesOutArray.
+            var cached = links.resolvedSignature;
+            if (cached && cached !== anySignature && !candidatesOutArray) {
+                return cached;
+            }
+            links.resolvedSignature = anySignature;
+            var result = resolveSignature(node, candidatesOutArray);
+            // If signature resolution originated in control flow type analysis (for example to compute the
+            // assigned type in a flow assignment) we don't cache the result as it may be based on temporary
+            // types from the control flow analysis.
+            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
+            return result;
+        }
+        function getResolvedOrAnySignature(node) {
+            // If we're already in the process of resolving the given signature, don't resolve again as
+            // that could cause infinite recursion. Instead, return anySignature.
+            return getNodeLinks(node).resolvedSignature === anySignature ? anySignature : getResolvedSignature(node);
+        }
+        function getInferredClassType(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.inferredClassType) {
+                links.inferredClassType = createAnonymousType(undefined, symbol.members, emptyArray, emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
+            }
+            return links.inferredClassType;
+        }
+        /**
+         * Syntactically and semantically checks a call or new expression.
+         * @param node The call/new expression to be checked.
+         * @returns On success, the expression's signature's return type. On failure, anyType.
+         */
+        function checkCallExpression(node) {
+            // Grammar checking; stop grammar-checking if checkGrammarTypeArguments return true
+            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
+            var signature = getResolvedSignature(node);
+            if (node.expression.kind === 95 /* SuperKeyword */) {
+                return voidType;
+            }
+            if (node.kind === 175 /* NewExpression */) {
+                var declaration = signature.declaration;
+                if (declaration &&
+                    declaration.kind !== 148 /* Constructor */ &&
+                    declaration.kind !== 152 /* ConstructSignature */ &&
+                    declaration.kind !== 157 /* ConstructorType */ &&
+                    !ts.isJSDocConstructSignature(declaration)) {
+                    // When resolved signature is a call signature (and not a construct signature) the result type is any, unless
+                    // the declaring function had members created through 'x.prototype.y = expr' or 'this.y = expr' psuedodeclarations
+                    // in a JS file
+                    var funcSymbol = checkExpression(node.expression).symbol;
+                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16 /* Function */)) {
+                        return getInferredClassType(funcSymbol);
+                    }
+                    else if (compilerOptions.noImplicitAny) {
+                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
+                    }
+                    return anyType;
+                }
+            }
+            // In JavaScript files, calls to any identifier 'require' are treated as external module imports
+            if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
+                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
+            }
+            return getReturnTypeOfSignature(signature);
+        }
+        function checkTaggedTemplateExpression(node) {
+            return getReturnTypeOfSignature(getResolvedSignature(node));
+        }
+        function checkAssertion(node) {
+            var exprType = getRegularTypeOfObjectLiteral(checkExpression(node.expression));
+            var targetType = getTypeFromTypeNode(node.type);
+            if (produceDiagnostics && targetType !== unknownType) {
+                var widenedType = getWidenedType(exprType);
+                if (!isTypeComparableTo(targetType, widenedType)) {
+                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
+                }
+            }
+            return targetType;
+        }
+        function checkNonNullAssertion(node) {
+            return getNonNullableType(checkExpression(node.expression));
+        }
+        function getTypeOfParameter(symbol) {
+            var type = getTypeOfSymbol(symbol);
+            if (strictNullChecks) {
+                var declaration = symbol.valueDeclaration;
+                if (declaration && declaration.initializer) {
+                    return addTypeKind(type, 32 /* Undefined */);
+                }
+            }
+            return type;
+        }
+        function getTypeAtPosition(signature, pos) {
+            return signature.hasRestParameter ?
+                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
+                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
+        }
+        function assignContextualParameterTypes(signature, context, mapper) {
+            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            for (var i = 0; i < len; i++) {
+                var parameter = signature.parameters[i];
+                var contextualParameterType = getTypeAtPosition(context, i);
+                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            }
+            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
+                var parameter = ts.lastOrUndefined(signature.parameters);
+                var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
+                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            }
+        }
+        // When contextual typing assigns a type to a parameter that contains a binding pattern, we also need to push
+        // the destructured type into the contained binding elements.
+        function assignBindingElementTypes(node) {
+            if (ts.isBindingPattern(node.name)) {
+                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (element.kind !== 193 /* OmittedExpression */) {
+                        if (element.name.kind === 69 /* Identifier */) {
+                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
+                        }
+                        assignBindingElementTypes(element);
+                    }
+                }
+            }
+        }
+        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType, mapper) {
+            var links = getSymbolLinks(parameter);
+            if (!links.type) {
+                links.type = instantiateType(contextualType, mapper);
+                // if inference didn't come up with anything but {}, fall back to the binding pattern if present.
+                if (links.type === emptyObjectType &&
+                    (parameter.valueDeclaration.name.kind === 167 /* ObjectBindingPattern */ ||
+                        parameter.valueDeclaration.name.kind === 168 /* ArrayBindingPattern */)) {
+                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
+                }
+                assignBindingElementTypes(parameter.valueDeclaration);
+            }
+            else if (isInferentialContext(mapper)) {
+                // Even if the parameter already has a type, it might be because it was given a type while
+                // processing the function as an argument to a prior signature during overload resolution.
+                // If this was the case, it may have caused some type parameters to be fixed. So here,
+                // we need to ensure that type parameters at the same positions get fixed again. This is
+                // done by calling instantiateType to attach the mapper to the contextualType, and then
+                // calling inferTypes to force a walk of contextualType so that all the correct fixing
+                // happens. The choice to pass in links.type may seem kind of arbitrary, but it serves
+                // to make sure that all the correct positions in contextualType are reached by the walk.
+                // Here is an example:
+                //
+                //      interface Base {
+                //          baseProp;
+                //      }
+                //      interface Derived extends Base {
+                //          toBase(): Base;
+                //      }
+                //
+                //      var derived: Derived;
+                //
+                //      declare function foo<T>(x: T, func: (p: T) => T): T;
+                //      declare function foo<T>(x: T, func: (p: T) => T): T;
+                //
+                //      var result = foo(derived, d => d.toBase());
+                //
+                // We are typing d while checking the second overload. But we've already given d
+                // a type (Derived) from the first overload. However, we still want to fix the
+                // T in the second overload so that we do not infer Base as a candidate for T
+                // (inferring Base would make type argument inference inconsistent between the two
+                // overloads).
+                inferTypes(mapper.context, links.type, instantiateType(contextualType, mapper));
+            }
+        }
+        function getReturnTypeFromJSDocComment(func) {
+            var returnTag = ts.getJSDocReturnTag(func);
+            if (returnTag && returnTag.typeExpression) {
+                return getTypeFromTypeNode(returnTag.typeExpression.type);
+            }
+            return undefined;
+        }
+        function createPromiseType(promisedType) {
+            // creates a `Promise<T>` type where `T` is the promisedType argument
+            var globalPromiseType = getGlobalPromiseType();
+            if (globalPromiseType !== emptyGenericType) {
+                // if the promised type is itself a promise, get the underlying type; otherwise, fallback to the promised type
+                promisedType = getAwaitedType(promisedType);
+                return createTypeReference(globalPromiseType, [promisedType]);
+            }
+            return emptyObjectType;
+        }
+        function getReturnTypeFromBody(func, contextualMapper) {
+            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
+            if (!func.body) {
+                return unknownType;
+            }
+            var isAsync = ts.isAsyncFunctionLike(func);
+            var type;
+            if (func.body.kind !== 199 /* Block */) {
+                type = checkExpressionCached(func.body, contextualMapper);
+                if (isAsync) {
+                    // From within an async function you can return either a non-promise value or a promise. Any
+                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+                    // return type of the body should be unwrapped to its awaited type, which we will wrap in
+                    // the native Promise<T> type later in this function.
+                    type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                }
+            }
+            else {
+                var types = void 0;
+                var funcIsGenerator = !!func.asteriskToken;
+                if (funcIsGenerator) {
+                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
+                    if (types.length === 0) {
+                        var iterableIteratorAny = createIterableIteratorType(anyType);
+                        if (compilerOptions.noImplicitAny) {
+                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
+                        }
+                        return iterableIteratorAny;
+                    }
+                }
+                else {
+                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
+                    if (!types) {
+                        return neverType;
+                    }
+                    if (types.length === 0) {
+                        if (isAsync) {
+                            // For an async function, the return type will not be void, but rather a Promise for void.
+                            var promiseType = createPromiseType(voidType);
+                            if (promiseType === emptyObjectType) {
+                                error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+                                return unknownType;
+                            }
+                            return promiseType;
+                        }
+                        return voidType;
+                    }
+                }
+                // When yield/return statements are contextually typed we allow the return type to be a union type.
+                // Otherwise we require the yield/return expressions to have a best common supertype.
+                type = contextualSignature ? getUnionType(types) : getCommonSupertype(types);
+                if (!type) {
+                    if (funcIsGenerator) {
+                        error(func, ts.Diagnostics.No_best_common_type_exists_among_yield_expressions);
+                        return createIterableIteratorType(unknownType);
+                    }
+                    else {
+                        error(func, ts.Diagnostics.No_best_common_type_exists_among_return_expressions);
+                        // Defer to unioning the return types so we get a) downstream errors earlier and b) better Salsa experience
+                        return getUnionType(types);
+                    }
+                }
+                if (funcIsGenerator) {
+                    type = createIterableIteratorType(type);
+                }
+            }
+            if (!contextualSignature) {
+                reportErrorsFromWidening(func, type);
+            }
+            var widenedType = getWidenedType(type);
+            if (isAsync) {
+                // From within an async function you can return either a non-promise value or a promise. Any
+                // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+                // return type of the body is awaited type of the body, wrapped in a native Promise<T> type.
+                var promiseType = createPromiseType(widenedType);
+                if (promiseType === emptyObjectType) {
+                    error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+                    return unknownType;
+                }
+                return promiseType;
+            }
+            else {
+                return widenedType;
+            }
+        }
+        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
+            var aggregatedTypes = [];
+            ts.forEachYieldExpression(func.body, function (yieldExpression) {
+                var expr = yieldExpression.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, contextualMapper);
+                    if (yieldExpression.asteriskToken) {
+                        // A yield* expression effectively yields everything that its operand yields
+                        type = checkElementTypeOfIterable(type, yieldExpression.expression);
+                    }
+                    if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
+                    }
+                }
+            });
+            return aggregatedTypes;
+        }
+        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
+            var isAsync = ts.isAsyncFunctionLike(func);
+            var aggregatedTypes = [];
+            var hasReturnWithNoExpression = !!(func.flags & 32768 /* HasImplicitReturn */);
+            var hasReturnOfTypeNever = false;
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
+                var expr = returnStatement.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, contextualMapper);
+                    if (isAsync) {
+                        // From within an async function you can return either a non-promise value or a promise. Any
+                        // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+                        // return type of the body should be unwrapped to its awaited type, which should be wrapped in
+                        // the native Promise<T> type by the caller.
+                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                    }
+                    if (type === neverType) {
+                        hasReturnOfTypeNever = true;
+                    }
+                    else if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
+                    }
+                }
+                else {
+                    hasReturnWithNoExpression = true;
+                }
+            });
+            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
+                func.kind === 179 /* FunctionExpression */ || func.kind === 180 /* ArrowFunction */)) {
+                return undefined;
+            }
+            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
+                if (!ts.contains(aggregatedTypes, undefinedType)) {
+                    aggregatedTypes.push(undefinedType);
+                }
+            }
+            return aggregatedTypes;
+        }
+        /**
+         * TypeScript Specification 1.0 (6.3) - July 2014
+         *   An explicitly typed function whose return type isn't the Void type,
+         *   the Any type, or a union type containing the Void or Any type as a constituent
+         *   must have at least one return statement somewhere in its body.
+         *   An exception to this rule is if the function implementation consists of a single 'throw' statement.
+         *
+         * @param returnType - return type of the function, can be undefined if return type is not explicitly specified
+         */
+        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            // Functions with with an explicitly specified 'void' or 'any' return type don't need any return expressions.
+            if (returnType && maybeTypeOfKind(returnType, 1 /* Any */ | 16 /* Void */)) {
+                return;
+            }
+            // If all we have is a function signature, or an arrow function with an expression body, then there is nothing to check.
+            // also if HasImplicitReturn flag is not set this means that all codepaths in function body end with return or throw
+            if (ts.nodeIsMissing(func.body) || func.body.kind !== 199 /* Block */ || !(func.flags & 32768 /* HasImplicitReturn */)) {
+                return;
+            }
+            var hasExplicitReturn = func.flags & 65536 /* HasExplicitReturn */;
+            if (returnType === neverType) {
+                error(func.type, ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
+            }
+            else if (returnType && !hasExplicitReturn) {
+                // minimal check: function has syntactic return type annotation and no explicit return statements in the body
+                // this function does not conform to the specification.
+                // NOTE: having returnType !== undefined is a precondition for entering this branch so func.type will always be present
+                error(func.type, ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
+            }
+            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
+                error(func.type, ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
+            }
+            else if (compilerOptions.noImplicitReturns) {
+                if (!returnType) {
+                    // If return type annotation is omitted check if function has any explicit return statements.
+                    // If it does not have any - its inferred return type is void - don't do any checks.
+                    // Otherwise get inferred return type from function body and report error only if it is not void / anytype
+                    if (!hasExplicitReturn) {
+                        return;
+                    }
+                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
+                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
+                        return;
+                    }
+                }
+                error(func.type || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
+            }
+        }
+        function checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper) {
+            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            // Grammar checking
+            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
+            if (!hasGrammarError && node.kind === 179 /* FunctionExpression */) {
+                checkGrammarForGenerator(node);
+            }
+            // The identityMapper object is used to indicate that function expressions are wildcards
+            if (contextualMapper === identityMapper && isContextSensitive(node)) {
+                checkNodeDeferred(node);
+                return anyFunctionType;
+            }
+            var links = getNodeLinks(node);
+            var type = getTypeOfSymbol(node.symbol);
+            var contextSensitive = isContextSensitive(node);
+            var mightFixTypeParameters = contextSensitive && isInferentialContext(contextualMapper);
+            // Check if function expression is contextually typed and assign parameter types if so.
+            // See the comment in assignTypeToParameterAndFixTypeParameters to understand why we need to
+            // check mightFixTypeParameters.
+            if (mightFixTypeParameters || !(links.flags & 1024 /* ContextChecked */)) {
+                var contextualSignature = getContextualSignature(node);
+                // If a type check is started at a function expression that is an argument of a function call, obtaining the
+                // contextual type may recursively get back to here during overload resolution of the call. If so, we will have
+                // already assigned contextual types.
+                var contextChecked = !!(links.flags & 1024 /* ContextChecked */);
+                if (mightFixTypeParameters || !contextChecked) {
+                    links.flags |= 1024 /* ContextChecked */;
+                    if (contextualSignature) {
+                        var signature = getSignaturesOfType(type, 0 /* Call */)[0];
+                        if (contextSensitive) {
+                            assignContextualParameterTypes(signature, contextualSignature, contextualMapper || identityMapper);
+                        }
+                        if (mightFixTypeParameters || !node.type && !signature.resolvedReturnType) {
+                            var returnType = getReturnTypeFromBody(node, contextualMapper);
+                            if (!signature.resolvedReturnType) {
+                                signature.resolvedReturnType = returnType;
+                            }
+                        }
+                    }
+                    if (!contextChecked) {
+                        checkSignatureDeclaration(node);
+                        checkNodeDeferred(node);
+                    }
+                }
+            }
+            if (produceDiagnostics && node.kind !== 147 /* MethodDeclaration */ && node.kind !== 146 /* MethodSignature */) {
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+            }
+            return type;
+        }
+        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
+            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            var isAsync = ts.isAsyncFunctionLike(node);
+            var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
+            if (!node.asteriskToken) {
+                // return is not necessary in the body of generators
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (node.body) {
+                if (!node.type) {
+                    // There are some checks that are only performed in getReturnTypeFromBody, that may produce errors
+                    // we need. An example is the noImplicitAny errors resulting from widening the return expression
+                    // of a function. Because checking of function expression bodies is deferred, there was never an
+                    // appropriate time to do this during the main walk of the file (see the comment at the top of
+                    // checkFunctionExpressionBodies). So it must be done now.
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+                }
+                if (node.body.kind === 199 /* Block */) {
+                    checkSourceElement(node.body);
+                }
+                else {
+                    // From within an async function you can return either a non-promise value or a promise. Any
+                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so we
+                    // should not be checking assignability of a promise to the return type. Instead, we need to
+                    // check assignability of the awaited type of the expression body against the promised type of
+                    // its return type annotation.
+                    var exprType = checkExpression(node.body);
+                    if (returnOrPromisedType) {
+                        if (isAsync) {
+                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member);
+                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
+                        }
+                    }
+                }
+            }
+        }
+        function checkArithmeticOperandType(operand, type, diagnostic) {
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 132 /* NumberLike */)) {
+                error(operand, diagnostic);
+                return false;
+            }
+            return true;
+        }
+        function isReadonlySymbol(symbol) {
+            // The following symbols are considered read-only:
+            // Properties with a 'readonly' modifier
+            // Variables declared with 'const'
+            // Get accessors without matching set accessors
+            // Enum members
+            return symbol.flags & 4 /* Property */ && (getDeclarationFlagsFromSymbol(symbol) & 64 /* Readonly */) !== 0 ||
+                symbol.flags & 3 /* Variable */ && (getDeclarationFlagsFromSymbol(symbol) & 2048 /* Const */) !== 0 ||
+                symbol.flags & 98304 /* Accessor */ && !(symbol.flags & 65536 /* SetAccessor */) ||
+                (symbol.flags & 8 /* EnumMember */) !== 0;
+        }
+        function isReferenceToReadonlyEntity(expr, symbol) {
+            if (isReadonlySymbol(symbol)) {
+                // Allow assignments to readonly properties within constructors of the same class declaration.
+                if (symbol.flags & 4 /* Property */ &&
+                    (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) &&
+                    expr.expression.kind === 97 /* ThisKeyword */) {
+                    // Look for if this is the constructor for the class that `symbol` is a property of.
+                    var func = ts.getContainingFunction(expr);
+                    if (!(func && func.kind === 148 /* Constructor */))
+                        return true;
+                    // If func.parent is a class and symbol is a (readonly) property of that class, or
+                    // if func is a constructor and symbol is a (readonly) parameter property declared in it,
+                    // then symbol is writeable here.
+                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
+                }
+                return true;
+            }
+            return false;
+        }
+        function isReferenceThroughNamespaceImport(expr) {
+            if (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) {
+                var node = skipParenthesizedNodes(expr.expression);
+                if (node.kind === 69 /* Identifier */) {
+                    var symbol = getNodeLinks(node).resolvedSymbol;
+                    if (symbol.flags & 8388608 /* Alias */) {
+                        var declaration = getDeclarationOfAliasSymbol(symbol);
+                        return declaration && declaration.kind === 232 /* NamespaceImport */;
+                    }
+                }
+            }
+            return false;
+        }
+        function checkReferenceExpression(expr, invalidReferenceMessage, constantVariableMessage) {
+            // References are combinations of identifiers, parentheses, and property accesses.
+            var node = skipParenthesizedNodes(expr);
+            if (node.kind !== 69 /* Identifier */ && node.kind !== 172 /* PropertyAccessExpression */ && node.kind !== 173 /* ElementAccessExpression */) {
+                error(expr, invalidReferenceMessage);
+                return false;
+            }
+            // Because we get the symbol from the resolvedSymbol property, it might be of kind
+            // SymbolFlags.ExportValue. In this case it is necessary to get the actual export
+            // symbol, which will have the correct flags set on it.
+            var links = getNodeLinks(node);
+            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
+            if (symbol) {
+                if (symbol !== unknownSymbol && symbol !== argumentsSymbol) {
+                    // Only variables (and not functions, classes, namespaces, enum objects, or enum members)
+                    // are considered references when referenced using a simple identifier.
+                    if (node.kind === 69 /* Identifier */ && !(symbol.flags & 3 /* Variable */)) {
+                        error(expr, invalidReferenceMessage);
+                        return false;
+                    }
+                    if (isReferenceToReadonlyEntity(node, symbol) || isReferenceThroughNamespaceImport(node)) {
+                        error(expr, constantVariableMessage);
+                        return false;
+                    }
+                }
+            }
+            else if (node.kind === 173 /* ElementAccessExpression */) {
+                if (links.resolvedIndexInfo && links.resolvedIndexInfo.isReadonly) {
+                    error(expr, constantVariableMessage);
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkDeleteExpression(node) {
+            checkExpression(node.expression);
+            return booleanType;
+        }
+        function checkTypeOfExpression(node) {
+            checkExpression(node.expression);
+            return stringType;
+        }
+        function checkVoidExpression(node) {
+            checkExpression(node.expression);
+            return undefinedWideningType;
+        }
+        function checkAwaitExpression(node) {
+            // Grammar checking
+            if (produceDiagnostics) {
+                if (!(node.flags & 33554432 /* AwaitContext */)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
+                }
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
+                }
+            }
+            var operandType = checkExpression(node.expression);
+            return checkAwaitedType(operandType, node);
+        }
+        function checkPrefixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            switch (node.operator) {
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                case 50 /* TildeToken */:
+                    if (maybeTypeOfKind(operandType, 16777216 /* ESSymbol */)) {
+                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
+                    }
+                    return numberType;
+                case 49 /* ExclamationToken */:
+                    return booleanType;
+                case 41 /* PlusPlusToken */:
+                case 42 /* MinusMinusToken */:
+                    var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+                    if (ok) {
+                        // run check only if former checks succeeded to avoid reporting cascading errors
+                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+                    }
+                    return numberType;
+            }
+            return unknownType;
+        }
+        function checkPostfixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+            if (ok) {
+                // run check only if former checks succeeded to avoid reporting cascading errors
+                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+            }
+            return numberType;
+        }
+        // Return true if type might be of the given kind. A union or intersection type might be of a given
+        // kind if at least one constituent type is of the given kind.
+        function maybeTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
+            }
+            if (type.flags & 49152 /* UnionOrIntersection */) {
+                var types = type.types;
+                for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
+                    var t = types_10[_i];
+                    if (maybeTypeOfKind(t, kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        // Return true if type is of the given kind. A union type is of a given kind if all constituent types
+        // are of the given kind. An intersection type is of a given kind if at least one constituent type is
+        // of the given kind.
+        function isTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
+            }
+            if (type.flags & 16384 /* Union */) {
+                var types = type.types;
+                for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
+                    var t = types_11[_i];
+                    if (!isTypeOfKind(t, kind)) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            if (type.flags & 32768 /* Intersection */) {
+                var types = type.types;
+                for (var _a = 0, types_12 = types; _a < types_12.length; _a++) {
+                    var t = types_12[_a];
+                    if (isTypeOfKind(t, kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isConstEnumObjectType(type) {
+            return type.flags & (80896 /* ObjectType */ | 65536 /* Anonymous */) && type.symbol && isConstEnumSymbol(type.symbol);
+        }
+        function isConstEnumSymbol(symbol) {
+            return (symbol.flags & 128 /* ConstEnum */) !== 0;
+        }
+        function checkInstanceOfExpression(left, right, leftType, rightType) {
+            // TypeScript 1.0 spec (April 2014): 4.15.4
+            // The instanceof operator requires the left operand to be of type Any, an object type, or a type parameter type,
+            // and the right operand to be of type Any or a subtype of the 'Function' interface type.
+            // The result is always of the Boolean primitive type.
+            // NOTE: do not raise error if leftType is unknown as related error was already reported
+            if (isTypeOfKind(leftType, 16777726 /* Primitive */)) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            // NOTE: do not raise error if right is unknown as related error was already reported
+            if (!(isTypeAny(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
+            }
+            return booleanType;
+        }
+        function checkInExpression(left, right, leftType, rightType) {
+            // TypeScript 1.0 spec (April 2014): 4.15.5
+            // The in operator requires the left operand to be of type Any, the String primitive type, or the Number primitive type,
+            // and the right operand to be of type Any, an object type, or a type parameter type.
+            // The result is always of the Boolean primitive type.
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 /* StringLike */ | 132 /* NumberLike */ | 16777216 /* ESSymbol */)) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
+            }
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 /* ObjectType */ | 512 /* TypeParameter */)) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            return booleanType;
+        }
+        function checkObjectLiteralAssignment(node, sourceType, contextualMapper) {
+            var properties = node.properties;
+            for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
+                var p = properties_3[_i];
+                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, contextualMapper);
+            }
+            return sourceType;
+        }
+        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, contextualMapper) {
+            if (property.kind === 253 /* PropertyAssignment */ || property.kind === 254 /* ShorthandPropertyAssignment */) {
+                var name_14 = property.name;
+                if (name_14.kind === 140 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(name_14);
+                }
+                if (isComputedNonLiteralName(name_14)) {
+                    return undefined;
+                }
+                var text = getTextOfPropertyName(name_14);
+                var type = isTypeAny(objectLiteralType)
+                    ? objectLiteralType
+                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
+                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1 /* Number */) ||
+                        getIndexTypeOfType(objectLiteralType, 0 /* String */);
+                if (type) {
+                    if (property.kind === 254 /* ShorthandPropertyAssignment */) {
+                        return checkDestructuringAssignment(property, type);
+                    }
+                    else {
+                        // non-shorthand property assignments should always have initializers
+                        return checkDestructuringAssignment(property.initializer, type);
+                    }
+                }
+                else {
+                    error(name_14, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_14));
+                }
+            }
+            else {
+                error(property, ts.Diagnostics.Property_assignment_expected);
+            }
+        }
+        function checkArrayLiteralAssignment(node, sourceType, contextualMapper) {
+            // This elementType will be used if the specific property corresponding to this index is not
+            // present (aka the tuple element property). This call also checks that the parentType is in
+            // fact an iterable or array (depending on target language).
+            var elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false) || unknownType;
+            var elements = node.elements;
+            for (var i = 0; i < elements.length; i++) {
+                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, contextualMapper);
+            }
+            return sourceType;
+        }
+        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, contextualMapper) {
+            var elements = node.elements;
+            var element = elements[elementIndex];
+            if (element.kind !== 193 /* OmittedExpression */) {
+                if (element.kind !== 191 /* SpreadElementExpression */) {
+                    var propName = "" + elementIndex;
+                    var type = isTypeAny(sourceType)
+                        ? sourceType
+                        : isTupleLikeType(sourceType)
+                            ? getTypeOfPropertyOfType(sourceType, propName)
+                            : elementType;
+                    if (type) {
+                        return checkDestructuringAssignment(element, type, contextualMapper);
+                    }
+                    else {
+                        if (isTupleType(sourceType)) {
+                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), sourceType.elementTypes.length, elements.length);
+                        }
+                        else {
+                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
+                        }
+                    }
+                }
+                else {
+                    if (elementIndex < elements.length - 1) {
+                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                    }
+                    else {
+                        var restExpression = element.expression;
+                        if (restExpression.kind === 187 /* BinaryExpression */ && restExpression.operatorToken.kind === 56 /* EqualsToken */) {
+                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                        }
+                        else {
+                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), contextualMapper);
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function checkDestructuringAssignment(exprOrAssignment, sourceType, contextualMapper) {
+            var target;
+            if (exprOrAssignment.kind === 254 /* ShorthandPropertyAssignment */) {
+                var prop = exprOrAssignment;
+                if (prop.objectAssignmentInitializer) {
+                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, contextualMapper);
+                }
+                target = exprOrAssignment.name;
+            }
+            else {
+                target = exprOrAssignment;
+            }
+            if (target.kind === 187 /* BinaryExpression */ && target.operatorToken.kind === 56 /* EqualsToken */) {
+                checkBinaryExpression(target, contextualMapper);
+                target = target.left;
+            }
+            if (target.kind === 171 /* ObjectLiteralExpression */) {
+                return checkObjectLiteralAssignment(target, sourceType, contextualMapper);
+            }
+            if (target.kind === 170 /* ArrayLiteralExpression */) {
+                return checkArrayLiteralAssignment(target, sourceType, contextualMapper);
+            }
+            return checkReferenceAssignment(target, sourceType, contextualMapper);
+        }
+        function checkReferenceAssignment(target, sourceType, contextualMapper) {
+            var targetType = checkExpression(target, contextualMapper);
+            if (checkReferenceExpression(target, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property)) {
+                checkTypeAssignableTo(sourceType, targetType, target, /*headMessage*/ undefined);
+            }
+            return sourceType;
+        }
+        function isTypeEqualityComparableTo(source, target) {
+            return (target.flags & 96 /* Nullable */) !== 0 || isTypeComparableTo(source, target);
+        }
+        function checkBinaryExpression(node, contextualMapper) {
+            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, contextualMapper, node);
+        }
+        function checkBinaryLikeExpression(left, operatorToken, right, contextualMapper, errorNode) {
+            var operator = operatorToken.kind;
+            if (operator === 56 /* EqualsToken */ && (left.kind === 171 /* ObjectLiteralExpression */ || left.kind === 170 /* ArrayLiteralExpression */)) {
+                return checkDestructuringAssignment(left, checkExpression(right, contextualMapper), contextualMapper);
+            }
+            var leftType = checkExpression(left, contextualMapper);
+            var rightType = checkExpression(right, contextualMapper);
+            switch (operator) {
+                case 37 /* AsteriskToken */:
+                case 38 /* AsteriskAsteriskToken */:
+                case 59 /* AsteriskEqualsToken */:
+                case 60 /* AsteriskAsteriskEqualsToken */:
+                case 39 /* SlashToken */:
+                case 61 /* SlashEqualsToken */:
+                case 40 /* PercentToken */:
+                case 62 /* PercentEqualsToken */:
+                case 36 /* MinusToken */:
+                case 58 /* MinusEqualsToken */:
+                case 43 /* LessThanLessThanToken */:
+                case 63 /* LessThanLessThanEqualsToken */:
+                case 44 /* GreaterThanGreaterThanToken */:
+                case 64 /* GreaterThanGreaterThanEqualsToken */:
+                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
+                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                case 47 /* BarToken */:
+                case 67 /* BarEqualsToken */:
+                case 48 /* CaretToken */:
+                case 68 /* CaretEqualsToken */:
+                case 46 /* AmpersandToken */:
+                case 66 /* AmpersandEqualsToken */:
+                    // TypeScript 1.0 spec (April 2014): 4.19.1
+                    // These operators require their operands to be of type Any, the Number primitive type,
+                    // or an enum type. Operands of an enum type are treated
+                    // as having the primitive type Number. If one operand is the null or undefined value,
+                    // it is treated as having the type of the other operand.
+                    // The result is always of the Number primitive type.
+                    if (leftType.flags & 96 /* Nullable */)
+                        leftType = rightType;
+                    if (rightType.flags & 96 /* Nullable */)
+                        rightType = leftType;
+                    leftType = getNonNullableType(leftType);
+                    rightType = getNonNullableType(rightType);
+                    var suggestedOperator = void 0;
+                    // if a user tries to apply a bitwise operator to 2 boolean operands
+                    // try and return them a helpful suggestion
+                    if ((leftType.flags & 8 /* Boolean */) &&
+                        (rightType.flags & 8 /* Boolean */) &&
+                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
+                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
+                    }
+                    else {
+                        // otherwise just check each operand separately and report errors as normal
+                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        if (leftOk && rightOk) {
+                            checkAssignmentOperator(numberType);
+                        }
+                    }
+                    return numberType;
+                case 35 /* PlusToken */:
+                case 57 /* PlusEqualsToken */:
+                    // TypeScript 1.0 spec (April 2014): 4.19.2
+                    // The binary + operator requires both operands to be of the Number primitive type or an enum type,
+                    // or at least one of the operands to be of type Any or the String primitive type.
+                    // If one operand is the null or undefined value, it is treated as having the type of the other operand.
+                    if (leftType.flags & 96 /* Nullable */)
+                        leftType = rightType;
+                    if (rightType.flags & 96 /* Nullable */)
+                        rightType = leftType;
+                    leftType = getNonNullableType(leftType);
+                    rightType = getNonNullableType(rightType);
+                    var resultType = void 0;
+                    if (isTypeOfKind(leftType, 132 /* NumberLike */) && isTypeOfKind(rightType, 132 /* NumberLike */)) {
+                        // Operands of an enum type are treated as having the primitive type Number.
+                        // If both operands are of the Number primitive type, the result is of the Number primitive type.
+                        resultType = numberType;
+                    }
+                    else {
+                        if (isTypeOfKind(leftType, 258 /* StringLike */) || isTypeOfKind(rightType, 258 /* StringLike */)) {
+                            // If one or both operands are of the String primitive type, the result is of the String primitive type.
+                            resultType = stringType;
+                        }
+                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
+                            // Otherwise, the result is of type Any.
+                            // NOTE: unknown type here denotes error type. Old compiler treated this case as any type so do we.
+                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
+                        }
+                        // Symbols are not allowed at all in arithmetic expressions
+                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
+                            return resultType;
+                        }
+                    }
+                    if (!resultType) {
+                        reportOperatorError();
+                        return anyType;
+                    }
+                    if (operator === 57 /* PlusEqualsToken */) {
+                        checkAssignmentOperator(resultType);
+                    }
+                    return resultType;
+                case 25 /* LessThanToken */:
+                case 27 /* GreaterThanToken */:
+                case 28 /* LessThanEqualsToken */:
+                case 29 /* GreaterThanEqualsToken */:
+                    if (checkForDisallowedESSymbolOperand(operator)) {
+                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
+                            reportOperatorError();
+                        }
+                    }
+                    return booleanType;
+                case 30 /* EqualsEqualsToken */:
+                case 31 /* ExclamationEqualsToken */:
+                case 32 /* EqualsEqualsEqualsToken */:
+                case 33 /* ExclamationEqualsEqualsToken */:
+                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
+                        reportOperatorError();
+                    }
+                    return booleanType;
+                case 91 /* InstanceOfKeyword */:
+                    return checkInstanceOfExpression(left, right, leftType, rightType);
+                case 90 /* InKeyword */:
+                    return checkInExpression(left, right, leftType, rightType);
+                case 51 /* AmpersandAmpersandToken */:
+                    return strictNullChecks ? addTypeKind(rightType, getCombinedTypeFlags(leftType) & 126 /* Falsy */) : rightType;
+                case 52 /* BarBarToken */:
+                    return getUnionType([getNonNullableType(leftType), rightType]);
+                case 56 /* EqualsToken */:
+                    checkAssignmentOperator(rightType);
+                    return getRegularTypeOfObjectLiteral(rightType);
+                case 24 /* CommaToken */:
+                    return rightType;
+            }
+            // Return true if there was no error, false if there was an error.
+            function checkForDisallowedESSymbolOperand(operator) {
+                var offendingSymbolOperand = maybeTypeOfKind(leftType, 16777216 /* ESSymbol */) ? left :
+                    maybeTypeOfKind(rightType, 16777216 /* ESSymbol */) ? right :
+                        undefined;
+                if (offendingSymbolOperand) {
+                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
+                    return false;
+                }
+                return true;
+            }
+            function getSuggestedBooleanOperator(operator) {
+                switch (operator) {
+                    case 47 /* BarToken */:
+                    case 67 /* BarEqualsToken */:
+                        return 52 /* BarBarToken */;
+                    case 48 /* CaretToken */:
+                    case 68 /* CaretEqualsToken */:
+                        return 33 /* ExclamationEqualsEqualsToken */;
+                    case 46 /* AmpersandToken */:
+                    case 66 /* AmpersandEqualsToken */:
+                        return 51 /* AmpersandAmpersandToken */;
+                    default:
+                        return undefined;
+                }
+            }
+            function checkAssignmentOperator(valueType) {
+                if (produceDiagnostics && operator >= 56 /* FirstAssignment */ && operator <= 68 /* LastAssignment */) {
+                    // TypeScript 1.0 spec (April 2014): 4.17
+                    // An assignment of the form
+                    //    VarExpr = ValueExpr
+                    // requires VarExpr to be classified as a reference
+                    // A compound assignment furthermore requires VarExpr to be classified as a reference (section 4.1)
+                    // and the type of the non - compound operation to be assignable to the type of VarExpr.
+                    var ok = checkReferenceExpression(left, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property);
+                    // Use default messages
+                    if (ok) {
+                        // to avoid cascading errors check assignability only if 'isReference' check succeeded and no errors were reported
+                        checkTypeAssignableTo(valueType, leftType, left, /*headMessage*/ undefined);
+                    }
+                }
+            }
+            function reportOperatorError() {
+                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
+            }
+        }
+        function isYieldExpressionInClass(node) {
+            var current = node;
+            var parent = node.parent;
+            while (parent) {
+                if (ts.isFunctionLike(parent) && current === parent.body) {
+                    return false;
+                }
+                else if (ts.isClassLike(current)) {
+                    return true;
+                }
+                current = parent;
+                parent = parent.parent;
+            }
+            return false;
+        }
+        function checkYieldExpression(node) {
+            // Grammar checking
+            if (produceDiagnostics) {
+                if (!(node.flags & 8388608 /* YieldContext */) || isYieldExpressionInClass(node)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
+                }
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
+                }
+            }
+            if (node.expression) {
+                var func = ts.getContainingFunction(node);
+                // If the user's code is syntactically correct, the func should always have a star. After all,
+                // we are in a yield context.
+                if (func && func.asteriskToken) {
+                    var expressionType = checkExpressionCached(node.expression, /*contextualMapper*/ undefined);
+                    var expressionElementType = void 0;
+                    var nodeIsYieldStar = !!node.asteriskToken;
+                    if (nodeIsYieldStar) {
+                        expressionElementType = checkElementTypeOfIterable(expressionType, node.expression);
+                    }
+                    // There is no point in doing an assignability check if the function
+                    // has no explicit return type because the return type is directly computed
+                    // from the yield expressions.
+                    if (func.type) {
+                        var signatureElementType = getElementTypeOfIterableIterator(getTypeFromTypeNode(func.type)) || anyType;
+                        if (nodeIsYieldStar) {
+                            checkTypeAssignableTo(expressionElementType, signatureElementType, node.expression, /*headMessage*/ undefined);
+                        }
+                        else {
+                            checkTypeAssignableTo(expressionType, signatureElementType, node.expression, /*headMessage*/ undefined);
+                        }
+                    }
+                }
+            }
+            // Both yield and yield* expressions have type 'any'
+            return anyType;
+        }
+        function checkConditionalExpression(node, contextualMapper) {
+            checkExpression(node.condition);
+            var type1 = checkExpression(node.whenTrue, contextualMapper);
+            var type2 = checkExpression(node.whenFalse, contextualMapper);
+            return getUnionType([type1, type2]);
+        }
+        function checkStringLiteralExpression(node) {
+            var contextualType = getContextualType(node);
+            if (contextualType && contextualTypeIsStringLiteralType(contextualType)) {
+                return getStringLiteralTypeForText(node.text);
+            }
+            return stringType;
+        }
+        function checkTemplateExpression(node) {
+            // We just want to check each expressions, but we are unconcerned with
+            // the type of each expression, as any value may be coerced into a string.
+            // It is worth asking whether this is what we really want though.
+            // A place where we actually *are* concerned with the expressions' types are
+            // in tagged templates.
+            ts.forEach(node.templateSpans, function (templateSpan) {
+                checkExpression(templateSpan.expression);
+            });
+            return stringType;
+        }
+        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
+            var saveContextualType = node.contextualType;
+            node.contextualType = contextualType;
+            var result = checkExpression(node, contextualMapper);
+            node.contextualType = saveContextualType;
+            return result;
+        }
+        function checkExpressionCached(node, contextualMapper) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // When computing a type that we're going to cache, we need to ignore any ongoing control flow
+                // analysis because variables may have transient types in indeterminable states. Moving flowLoopStart
+                // to the top of the stack ensures all transient types are computed from a known point.
+                var saveFlowLoopStart = flowLoopStart;
+                flowLoopStart = flowLoopCount;
+                links.resolvedType = checkExpression(node, contextualMapper);
+                flowLoopStart = saveFlowLoopStart;
+            }
+            return links.resolvedType;
+        }
+        function checkPropertyAssignment(node, contextualMapper) {
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 140 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
+            }
+            return checkExpression(node.initializer, contextualMapper);
+        }
+        function checkObjectLiteralMethod(node, contextualMapper) {
+            // Grammar checking
+            checkGrammarMethod(node);
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 140 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
+            }
+            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
+            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
+        }
+        function instantiateTypeWithSingleGenericCallSignature(node, type, contextualMapper) {
+            if (isInferentialContext(contextualMapper)) {
+                var signature = getSingleCallSignature(type);
+                if (signature && signature.typeParameters) {
+                    var contextualType = getApparentTypeOfContextualType(node);
+                    if (contextualType) {
+                        var contextualSignature = getSingleCallSignature(contextualType);
+                        if (contextualSignature && !contextualSignature.typeParameters) {
+                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper));
+                        }
+                    }
+                }
+            }
+            return type;
+        }
+        // Checks an expression and returns its type. The contextualMapper parameter serves two purposes: When
+        // contextualMapper is not undefined and not equal to the identityMapper function object it indicates that the
+        // expression is being inferentially typed (section 4.15.2 in spec) and provides the type mapper to use in
+        // conjunction with the generic contextual type. When contextualMapper is equal to the identityMapper function
+        // object, it serves as an indicator that all contained function and arrow expressions should be considered to
+        // have the wildcard function type; this form of type check is used during overload resolution to exclude
+        // contextually typed function and arrow expressions in the initial phase.
+        function checkExpression(node, contextualMapper) {
+            var type;
+            if (node.kind === 139 /* QualifiedName */) {
+                type = checkQualifiedName(node);
+            }
+            else {
+                var uninstantiatedType = checkExpressionWorker(node, contextualMapper);
+                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
+            }
+            if (isConstEnumObjectType(type)) {
+                // enum object type for const enums are only permitted in:
+                // - 'left' in property access
+                // - 'object' in indexed access
+                // - target in rhs of import statement
+                var ok = (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.expression === node) ||
+                    (node.parent.kind === 173 /* ElementAccessExpression */ && node.parent.expression === node) ||
+                    ((node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */) && isInRightSideOfImportOrExportAssignment(node));
+                if (!ok) {
+                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
+                }
+            }
+            return type;
+        }
+        function checkNumericLiteral(node) {
+            // Grammar checking
+            checkGrammarNumericLiteral(node);
+            return numberType;
+        }
+        function checkExpressionWorker(node, contextualMapper) {
+            switch (node.kind) {
+                case 69 /* Identifier */:
+                    return checkIdentifier(node);
+                case 97 /* ThisKeyword */:
+                    return checkThisExpression(node);
+                case 95 /* SuperKeyword */:
+                    return checkSuperExpression(node);
+                case 93 /* NullKeyword */:
+                    return nullWideningType;
+                case 99 /* TrueKeyword */:
+                case 84 /* FalseKeyword */:
+                    return booleanType;
+                case 8 /* NumericLiteral */:
+                    return checkNumericLiteral(node);
+                case 189 /* TemplateExpression */:
+                    return checkTemplateExpression(node);
+                case 9 /* StringLiteral */:
+                    return checkStringLiteralExpression(node);
+                case 11 /* NoSubstitutionTemplateLiteral */:
+                    return stringType;
+                case 10 /* RegularExpressionLiteral */:
+                    return globalRegExpType;
+                case 170 /* ArrayLiteralExpression */:
+                    return checkArrayLiteral(node, contextualMapper);
+                case 171 /* ObjectLiteralExpression */:
+                    return checkObjectLiteral(node, contextualMapper);
+                case 172 /* PropertyAccessExpression */:
+                    return checkPropertyAccessExpression(node);
+                case 173 /* ElementAccessExpression */:
+                    return checkIndexedAccess(node);
+                case 174 /* CallExpression */:
+                case 175 /* NewExpression */:
+                    return checkCallExpression(node);
+                case 176 /* TaggedTemplateExpression */:
+                    return checkTaggedTemplateExpression(node);
+                case 178 /* ParenthesizedExpression */:
+                    return checkExpression(node.expression, contextualMapper);
+                case 192 /* ClassExpression */:
+                    return checkClassExpression(node);
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    return checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
+                case 182 /* TypeOfExpression */:
+                    return checkTypeOfExpression(node);
+                case 177 /* TypeAssertionExpression */:
+                case 195 /* AsExpression */:
+                    return checkAssertion(node);
+                case 196 /* NonNullExpression */:
+                    return checkNonNullAssertion(node);
+                case 181 /* DeleteExpression */:
+                    return checkDeleteExpression(node);
+                case 183 /* VoidExpression */:
+                    return checkVoidExpression(node);
+                case 184 /* AwaitExpression */:
+                    return checkAwaitExpression(node);
+                case 185 /* PrefixUnaryExpression */:
+                    return checkPrefixUnaryExpression(node);
+                case 186 /* PostfixUnaryExpression */:
+                    return checkPostfixUnaryExpression(node);
+                case 187 /* BinaryExpression */:
+                    return checkBinaryExpression(node, contextualMapper);
+                case 188 /* ConditionalExpression */:
+                    return checkConditionalExpression(node, contextualMapper);
+                case 191 /* SpreadElementExpression */:
+                    return checkSpreadElementExpression(node, contextualMapper);
+                case 193 /* OmittedExpression */:
+                    return undefinedWideningType;
+                case 190 /* YieldExpression */:
+                    return checkYieldExpression(node);
+                case 248 /* JsxExpression */:
+                    return checkJsxExpression(node);
+                case 241 /* JsxElement */:
+                    return checkJsxElement(node);
+                case 242 /* JsxSelfClosingElement */:
+                    return checkJsxSelfClosingElement(node);
+                case 243 /* JsxOpeningElement */:
+                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
+            }
+            return unknownType;
+        }
+        // DECLARATION AND STATEMENT TYPE CHECKING
+        function checkTypeParameter(node) {
+            // Grammar Checking
+            if (node.expression) {
+                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
+            }
+            checkSourceElement(node.constraint);
+            getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node)));
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
+            }
+        }
+        function checkParameter(node) {
+            // Grammar checking
+            // It is a SyntaxError if the Identifier "eval" or the Identifier "arguments" occurs as the
+            // Identifier in a PropertySetParameterList of a PropertyAssignment that is contained in strict code
+            // or if its FunctionBody is strict code(11.1.5).
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkVariableLikeDeclaration(node);
+            var func = ts.getContainingFunction(node);
+            if (node.flags & 92 /* ParameterPropertyModifier */) {
+                func = ts.getContainingFunction(node);
+                if (!(func.kind === 148 /* Constructor */ && ts.nodeIsPresent(func.body))) {
+                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
+                }
+            }
+            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
+                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
+            }
+            if (node.name.text === "this") {
+                if (ts.indexOf(func.parameters, node) !== 0) {
+                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
+                }
+                if (func.kind === 148 /* Constructor */ || func.kind === 152 /* ConstructSignature */ || func.kind === 157 /* ConstructorType */) {
+                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
+                }
+            }
+            // Only check rest parameter type if it's not a binding pattern. Since binding patterns are
+            // not allowed in a rest parameter, we already have an error from checkGrammarParameterList.
+            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
+                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
+            }
+        }
+        function isSyntacticallyValidGenerator(node) {
+            if (!node.asteriskToken || !node.body) {
+                return false;
+            }
+            return node.kind === 147 /* MethodDeclaration */ ||
+                node.kind === 220 /* FunctionDeclaration */ ||
+                node.kind === 179 /* FunctionExpression */;
+        }
+        function getTypePredicateParameterIndex(parameterList, parameter) {
+            if (parameterList) {
+                for (var i = 0; i < parameterList.length; i++) {
+                    var param = parameterList[i];
+                    if (param.name.kind === 69 /* Identifier */ &&
+                        param.name.text === parameter.text) {
+                        return i;
+                    }
+                }
+            }
+            return -1;
+        }
+        function checkTypePredicate(node) {
+            var parent = getTypePredicateParent(node);
+            if (!parent) {
+                // The parent must not be valid.
+                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
+                return;
+            }
+            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
+            if (!typePredicate) {
+                return;
+            }
+            var parameterName = node.parameterName;
+            if (ts.isThisTypePredicate(typePredicate)) {
+                getTypeFromThisTypeNode(parameterName);
+            }
+            else {
+                if (typePredicate.parameterIndex >= 0) {
+                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
+                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
+                    }
+                    else {
+                        var leadingError = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
+                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, 
+                        /*headMessage*/ undefined, leadingError);
+                    }
+                }
+                else if (parameterName) {
+                    var hasReportedError = false;
+                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
+                        var name_15 = _a[_i].name;
+                        if (ts.isBindingPattern(name_15) &&
+                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_15, parameterName, typePredicate.parameterName)) {
+                            hasReportedError = true;
+                            break;
+                        }
+                    }
+                    if (!hasReportedError) {
+                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
+                    }
+                }
+            }
+        }
+        function getTypePredicateParent(node) {
+            switch (node.parent.kind) {
+                case 180 /* ArrowFunction */:
+                case 151 /* CallSignature */:
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 156 /* FunctionType */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                    var parent_10 = node.parent;
+                    if (node === parent_10.type) {
+                        return parent_10;
+                    }
+            }
+        }
+        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
+            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
+                var name_16 = _a[_i].name;
+                if (name_16.kind === 69 /* Identifier */ &&
+                    name_16.text === predicateVariableName) {
+                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
+                    return true;
+                }
+                else if (name_16.kind === 168 /* ArrayBindingPattern */ ||
+                    name_16.kind === 167 /* ObjectBindingPattern */) {
+                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_16, predicateVariableNode, predicateVariableName)) {
+                        return true;
+                    }
+                }
+            }
+        }
+        function checkSignatureDeclaration(node) {
+            // Grammar checking
+            if (node.kind === 153 /* IndexSignature */) {
+                checkGrammarIndexSignature(node);
+            }
+            else if (node.kind === 156 /* FunctionType */ || node.kind === 220 /* FunctionDeclaration */ || node.kind === 157 /* ConstructorType */ ||
+                node.kind === 151 /* CallSignature */ || node.kind === 148 /* Constructor */ ||
+                node.kind === 152 /* ConstructSignature */) {
+                checkGrammarFunctionLikeDeclaration(node);
+            }
+            checkTypeParameters(node.typeParameters);
+            ts.forEach(node.parameters, checkParameter);
+            if (node.type) {
+                checkSourceElement(node.type);
+            }
+            if (produceDiagnostics) {
+                checkCollisionWithArgumentsInGeneratedCode(node);
+                if (compilerOptions.noImplicitAny && !node.type) {
+                    switch (node.kind) {
+                        case 152 /* ConstructSignature */:
+                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                        case 151 /* CallSignature */:
+                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                    }
+                }
+                if (node.type) {
+                    if (languageVersion >= 2 /* ES6 */ && isSyntacticallyValidGenerator(node)) {
+                        var returnType = getTypeFromTypeNode(node.type);
+                        if (returnType === voidType) {
+                            error(node.type, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
+                        }
+                        else {
+                            var generatorElementType = getElementTypeOfIterableIterator(returnType) || anyType;
+                            var iterableIteratorInstantiation = createIterableIteratorType(generatorElementType);
+                            // Naively, one could check that IterableIterator<any> is assignable to the return type annotation.
+                            // However, that would not catch the error in the following case.
+                            //
+                            //    interface BadGenerator extends Iterable<number>, Iterator<string> { }
+                            //    function* g(): BadGenerator { } // Iterable and Iterator have different types!
+                            //
+                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, node.type);
+                        }
+                    }
+                    else if (ts.isAsyncFunctionLike(node)) {
+                        checkAsyncFunctionReturnType(node);
+                    }
+                }
+            }
+        }
+        function checkClassForDuplicateDeclarations(node) {
+            var getter = 1, setter = 2, property = getter | setter;
+            var instanceNames = {};
+            var staticNames = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 148 /* Constructor */) {
+                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                        var param = _c[_b];
+                        if (ts.isParameterPropertyDeclaration(param)) {
+                            addName(instanceNames, param.name, param.name.text, property);
+                        }
+                    }
+                }
+                else {
+                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113 /* StaticKeyword */; });
+                    var names = static ? staticNames : instanceNames;
+                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
+                    if (memberName) {
+                        switch (member.kind) {
+                            case 149 /* GetAccessor */:
+                                addName(names, member.name, memberName, getter);
+                                break;
+                            case 150 /* SetAccessor */:
+                                addName(names, member.name, memberName, setter);
+                                break;
+                            case 145 /* PropertyDeclaration */:
+                                addName(names, member.name, memberName, property);
+                                break;
+                        }
+                    }
+                }
+            }
+            function addName(names, location, name, meaning) {
+                if (ts.hasProperty(names, name)) {
+                    var prev = names[name];
+                    if (prev & meaning) {
+                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                    }
+                    else {
+                        names[name] = prev | meaning;
+                    }
+                }
+                else {
+                    names[name] = meaning;
+                }
+            }
+        }
+        function checkObjectTypeForDuplicateDeclarations(node) {
+            var names = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind == 144 /* PropertySignature */) {
+                    var memberName = void 0;
+                    switch (member.name.kind) {
+                        case 9 /* StringLiteral */:
+                        case 8 /* NumericLiteral */:
+                        case 69 /* Identifier */:
+                            memberName = member.name.text;
+                            break;
+                        default:
+                            continue;
+                    }
+                    if (ts.hasProperty(names, memberName)) {
+                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                    }
+                    else {
+                        names[memberName] = true;
+                    }
+                }
+            }
+        }
+        function checkTypeForDuplicateIndexSignatures(node) {
+            if (node.kind === 222 /* InterfaceDeclaration */) {
+                var nodeSymbol = getSymbolOfNode(node);
+                // in case of merging interface declaration it is possible that we'll enter this check procedure several times for every declaration
+                // to prevent this run check only for the first declaration of a given kind
+                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
+                    return;
+                }
+            }
+            // TypeScript 1.0 spec (April 2014)
+            // 3.7.4: An object type can contain at most one string index signature and one numeric index signature.
+            // 8.5: A class declaration can have at most one string index member declaration and one numeric index member declaration
+            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
+            if (indexSymbol) {
+                var seenNumericIndexer = false;
+                var seenStringIndexer = false;
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var declaration = decl;
+                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
+                        switch (declaration.parameters[0].type.kind) {
+                            case 132 /* StringKeyword */:
+                                if (!seenStringIndexer) {
+                                    seenStringIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
+                                }
+                                break;
+                            case 130 /* NumberKeyword */:
+                                if (!seenNumericIndexer) {
+                                    seenNumericIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
+                                }
+                                break;
+                        }
+                    }
+                }
+            }
+        }
+        function checkPropertyDeclaration(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
+            checkVariableLikeDeclaration(node);
+        }
+        function checkMethodDeclaration(node) {
+            // Grammar checking
+            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
+            // Grammar checking for modifiers is done inside the function checkGrammarFunctionLikeDeclaration
+            checkFunctionOrMethodDeclaration(node);
+            // Abstract methods cannot have an implementation.
+            // Extra checks are to avoid reporting multiple errors relating to the "abstractness" of the node.
+            if (node.flags & 128 /* Abstract */ && node.body) {
+                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
+            }
+        }
+        function checkConstructorDeclaration(node) {
+            // Grammar check on signature of constructor and modifier of the constructor is done in checkSignatureDeclaration function.
+            checkSignatureDeclaration(node);
+            // Grammar check for checking only related to constructorDeclaration
+            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
+            checkSourceElement(node.body);
+            var symbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
+            // Only type check the symbol once
+            if (node === firstDeclaration) {
+                checkFunctionOrConstructorSymbol(symbol);
+            }
+            // exit early in the case of signature - super checks are not relevant to them
+            if (ts.nodeIsMissing(node.body)) {
+                return;
+            }
+            if (!produceDiagnostics) {
+                return;
+            }
+            function containsSuperCallAsComputedPropertyName(n) {
+                return n.name && containsSuperCall(n.name);
+            }
+            function containsSuperCall(n) {
+                if (ts.isSuperCallExpression(n)) {
+                    return true;
+                }
+                else if (ts.isFunctionLike(n)) {
+                    return false;
+                }
+                else if (ts.isClassLike(n)) {
+                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
+                }
+                return ts.forEachChild(n, containsSuperCall);
+            }
+            function markThisReferencesAsErrors(n) {
+                if (n.kind === 97 /* ThisKeyword */) {
+                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                }
+                else if (n.kind !== 179 /* FunctionExpression */ && n.kind !== 220 /* FunctionDeclaration */) {
+                    ts.forEachChild(n, markThisReferencesAsErrors);
+                }
+            }
+            function isInstancePropertyWithInitializer(n) {
+                return n.kind === 145 /* PropertyDeclaration */ &&
+                    !(n.flags & 32 /* Static */) &&
+                    !!n.initializer;
+            }
+            // TS 1.0 spec (April 2014): 8.3.2
+            // Constructors of classes with no extends clause may not contain super calls, whereas
+            // constructors of derived classes must contain at least one super call somewhere in their function body.
+            var containingClassDecl = node.parent;
+            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
+                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
+                var superCall = getSuperCallInConstructor(node);
+                if (superCall) {
+                    if (classExtendsNull) {
+                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
+                    }
+                    // The first statement in the body of a constructor (excluding prologue directives) must be a super call
+                    // if both of the following are true:
+                    // - The containing class is a derived class.
+                    // - The constructor declares parameter properties
+                    //   or the containing class declares instance member variables with initializers.
+                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
+                        ts.forEach(node.parameters, function (p) { return p.flags & 92 /* ParameterPropertyModifier */; });
+                    // Skip past any prologue directives to find the first statement
+                    // to ensure that it was a super call.
+                    if (superCallShouldBeFirst) {
+                        var statements = node.body.statements;
+                        var superCallStatement = void 0;
+                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
+                            var statement = statements_2[_i];
+                            if (statement.kind === 202 /* ExpressionStatement */ && ts.isSuperCallExpression(statement.expression)) {
+                                superCallStatement = statement;
+                                break;
+                            }
+                            if (!ts.isPrologueDirective(statement)) {
+                                break;
+                            }
+                        }
+                        if (!superCallStatement) {
+                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
+                        }
+                    }
+                }
+                else if (!classExtendsNull) {
+                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
+                }
+            }
+        }
+        function checkAccessorDeclaration(node) {
+            if (produceDiagnostics) {
+                // Grammar checking accessors
+                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
+                checkDecorators(node);
+                checkSignatureDeclaration(node);
+                if (node.kind === 149 /* GetAccessor */) {
+                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 32768 /* HasImplicitReturn */)) {
+                        if (node.flags & 65536 /* HasExplicitReturn */) {
+                            if (compilerOptions.noImplicitReturns) {
+                                error(node.name, ts.Diagnostics.Not_all_code_paths_return_a_value);
+                            }
+                        }
+                        else {
+                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
+                        }
+                    }
+                }
+                // Do not use hasDynamicName here, because that returns false for well known symbols.
+                // We want to perform checkComputedPropertyName for all computed properties, including
+                // well known symbols.
+                if (node.name.kind === 140 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(node.name);
+                }
+                if (!ts.hasDynamicName(node)) {
+                    // TypeScript 1.0 spec (April 2014): 8.4.3
+                    // Accessors for the same member name must specify the same accessibility.
+                    var otherKind = node.kind === 149 /* GetAccessor */ ? 150 /* SetAccessor */ : 149 /* GetAccessor */;
+                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
+                    if (otherAccessor) {
+                        if (((node.flags & 28 /* AccessibilityModifier */) !== (otherAccessor.flags & 28 /* AccessibilityModifier */))) {
+                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
+                        }
+                        if (((node.flags & 128 /* Abstract */) !== (otherAccessor.flags & 128 /* Abstract */))) {
+                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
+                        }
+                        // TypeScript 1.0 spec (April 2014): 4.5
+                        // If both accessors include type annotations, the specified types must be identical.
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorThisType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
+                    }
+                }
+                getTypeOfAccessors(getSymbolOfNode(node));
+            }
+            if (node.parent.kind !== 171 /* ObjectLiteralExpression */) {
+                checkSourceElement(node.body);
+            }
+            else {
+                checkNodeDeferred(node);
+            }
+        }
+        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
+            var firstType = getAnnotatedType(first);
+            var secondType = getAnnotatedType(second);
+            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
+                error(first, message);
+            }
+        }
+        function checkAccessorDeferred(node) {
+            checkSourceElement(node.body);
+        }
+        function checkMissingDeclaration(node) {
+            checkDecorators(node);
+        }
+        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
+            var typeArguments;
+            var mapper;
+            var result = true;
+            for (var i = 0; i < typeParameters.length; i++) {
+                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                if (constraint) {
+                    if (!typeArguments) {
+                        typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
+                        mapper = createTypeMapper(typeParameters, typeArguments);
+                    }
+                    var typeArgument = typeArguments[i];
+                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
+                }
+            }
+            return result;
+        }
+        function checkTypeReferenceNode(node) {
+            checkGrammarTypeArguments(node, node.typeArguments);
+            var type = getTypeFromTypeReference(node);
+            if (type !== unknownType && node.typeArguments) {
+                // Do type argument local checks only if referenced type is successfully resolved
+                ts.forEach(node.typeArguments, checkSourceElement);
+                if (produceDiagnostics) {
+                    var symbol = getNodeLinks(node).resolvedSymbol;
+                    var typeParameters = symbol.flags & 524288 /* TypeAlias */ ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
+                    checkTypeArgumentConstraints(typeParameters, node.typeArguments);
+                }
+            }
+        }
+        function checkTypeQuery(node) {
+            getTypeFromTypeQueryNode(node);
+        }
+        function checkTypeLiteral(node) {
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
+            }
+        }
+        function checkArrayType(node) {
+            checkSourceElement(node.elementType);
+        }
+        function checkTupleType(node) {
+            // Grammar checking
+            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
+            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
+                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
+            }
+            ts.forEach(node.elementTypes, checkSourceElement);
+        }
+        function checkUnionOrIntersectionType(node) {
+            ts.forEach(node.types, checkSourceElement);
+        }
+        function isPrivateWithinAmbient(node) {
+            return (node.flags & 8 /* Private */) && ts.isInAmbientContext(node);
+        }
+        function getEffectiveDeclarationFlags(n, flagsToCheck) {
+            var flags = ts.getCombinedNodeFlags(n);
+            // children of classes (even ambient classes) should not be marked as ambient or export
+            // because those flags have no useful semantics there.
+            if (n.parent.kind !== 222 /* InterfaceDeclaration */ &&
+                n.parent.kind !== 221 /* ClassDeclaration */ &&
+                n.parent.kind !== 192 /* ClassExpression */ &&
+                ts.isInAmbientContext(n)) {
+                if (!(flags & 2 /* Ambient */)) {
+                    // It is nested in an ambient context, which means it is automatically exported
+                    flags |= 1 /* Export */;
+                }
+                flags |= 2 /* Ambient */;
+            }
+            return flags & flagsToCheck;
+        }
+        function checkFunctionOrConstructorSymbol(symbol) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            function getCanonicalOverload(overloads, implementation) {
+                // Consider the canonical set of flags to be the flags of the bodyDeclaration or the first declaration
+                // Error on all deviations from this canonical set of flags
+                // The caveat is that if some overloads are defined in lib.d.ts, we don't want to
+                // report the errors on those. To achieve this, we will say that the implementation is
+                // the canonical signature only if it is in the same container as the first overload
+                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
+                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
+            }
+            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
+                // Error if some overloads have a flag that is not shared by all overloads. To find the
+                // deviations, we XOR someOverloadFlags with allOverloadFlags
+                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
+                if (someButNotAllOverloadFlags !== 0) {
+                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
+                    ts.forEach(overloads, function (o) {
+                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
+                        if (deviation & 1 /* Export */) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                        }
+                        else if (deviation & 2 /* Ambient */) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                        }
+                        else if (deviation & (8 /* Private */ | 16 /* Protected */)) {
+                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                        }
+                        else if (deviation & 128 /* Abstract */) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                        }
+                    });
+                }
+            }
+            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
+                if (someHaveQuestionToken !== allHaveQuestionToken) {
+                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
+                    ts.forEach(overloads, function (o) {
+                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
+                        if (deviation) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                        }
+                    });
+                }
+            }
+            var flagsToCheck = 1 /* Export */ | 2 /* Ambient */ | 8 /* Private */ | 16 /* Protected */ | 128 /* Abstract */;
+            var someNodeFlags = 0;
+            var allNodeFlags = flagsToCheck;
+            var someHaveQuestionToken = false;
+            var allHaveQuestionToken = true;
+            var hasOverloads = false;
+            var bodyDeclaration;
+            var lastSeenNonAmbientDeclaration;
+            var previousDeclaration;
+            var declarations = symbol.declarations;
+            var isConstructor = (symbol.flags & 16384 /* Constructor */) !== 0;
+            function reportImplementationExpectedError(node) {
+                if (node.name && ts.nodeIsMissing(node.name)) {
+                    return;
+                }
+                var seen = false;
+                var subsequentNode = ts.forEachChild(node.parent, function (c) {
+                    if (seen) {
+                        return c;
+                    }
+                    else {
+                        seen = c === node;
+                    }
+                });
+                // We may be here because of some extra nodes between overloads that could not be parsed into a valid node.
+                // In this case the subsequent node is not really consecutive (.pos !== node.end), and we must ignore it here.
+                if (subsequentNode && subsequentNode.pos === node.end) {
+                    if (subsequentNode.kind === node.kind) {
+                        var errorNode_1 = subsequentNode.name || subsequentNode;
+                        // TODO(jfreeman): These are methods, so handle computed name case
+                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
+                            var reportError = (node.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) &&
+                                (node.flags & 32 /* Static */) !== (subsequentNode.flags & 32 /* Static */);
+                            // we can get here in two cases
+                            // 1. mixed static and instance class members
+                            // 2. something with the same name was defined before the set of overloads that prevents them from merging
+                            // here we'll report error only for the first case since for second we should already report error in binder
+                            if (reportError) {
+                                var diagnostic = node.flags & 32 /* Static */ ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
+                                error(errorNode_1, diagnostic);
+                            }
+                            return;
+                        }
+                        else if (ts.nodeIsPresent(subsequentNode.body)) {
+                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
+                            return;
+                        }
+                    }
+                }
+                var errorNode = node.name || node;
+                if (isConstructor) {
+                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
+                }
+                else {
+                    // Report different errors regarding non-consecutive blocks of declarations depending on whether
+                    // the node in question is abstract.
+                    if (node.flags & 128 /* Abstract */) {
+                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
+                    }
+                    else {
+                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
+                    }
+                }
+            }
+            // when checking exported function declarations across modules check only duplicate implementations
+            // names and consistency of modifiers are verified when we check local symbol
+            var isExportSymbolInsideModule = symbol.parent && symbol.parent.flags & 1536 /* Module */;
+            var duplicateFunctionDeclaration = false;
+            var multipleConstructorImplementation = false;
+            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
+                var current = declarations_4[_i];
+                var node = current;
+                var inAmbientContext = ts.isInAmbientContext(node);
+                var inAmbientContextOrInterface = node.parent.kind === 222 /* InterfaceDeclaration */ || node.parent.kind === 159 /* TypeLiteral */ || inAmbientContext;
+                if (inAmbientContextOrInterface) {
+                    // check if declarations are consecutive only if they are non-ambient
+                    // 1. ambient declarations can be interleaved
+                    // i.e. this is legal
+                    //     declare function foo();
+                    //     declare function bar();
+                    //     declare function foo();
+                    // 2. mixing ambient and non-ambient declarations is a separate error that will be reported - do not want to report an extra one
+                    previousDeclaration = undefined;
+                }
+                if (node.kind === 220 /* FunctionDeclaration */ || node.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */ || node.kind === 148 /* Constructor */) {
+                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
+                    someNodeFlags |= currentNodeFlags;
+                    allNodeFlags &= currentNodeFlags;
+                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
+                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
+                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
+                        if (isConstructor) {
+                            multipleConstructorImplementation = true;
+                        }
+                        else {
+                            duplicateFunctionDeclaration = true;
+                        }
+                    }
+                    else if (!isExportSymbolInsideModule && previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
+                        reportImplementationExpectedError(previousDeclaration);
+                    }
+                    if (ts.nodeIsPresent(node.body)) {
+                        if (!bodyDeclaration) {
+                            bodyDeclaration = node;
+                        }
+                    }
+                    else {
+                        hasOverloads = true;
+                    }
+                    previousDeclaration = node;
+                    if (!inAmbientContextOrInterface) {
+                        lastSeenNonAmbientDeclaration = node;
+                    }
+                }
+            }
+            if (multipleConstructorImplementation) {
+                ts.forEach(declarations, function (declaration) {
+                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
+                });
+            }
+            if (duplicateFunctionDeclaration) {
+                ts.forEach(declarations, function (declaration) {
+                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
+                });
+            }
+            // Abstract methods can't have an implementation -- in particular, they don't need one.
+            if (!isExportSymbolInsideModule && lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
+                !(lastSeenNonAmbientDeclaration.flags & 128 /* Abstract */) && !lastSeenNonAmbientDeclaration.questionToken) {
+                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
+            }
+            if (hasOverloads) {
+                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
+                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
+                if (bodyDeclaration) {
+                    var signatures = getSignaturesOfSymbol(symbol);
+                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
+                    for (var _a = 0, signatures_3 = signatures; _a < signatures_3.length; _a++) {
+                        var signature = signatures_3[_a];
+                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
+                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+        function checkExportsOnMergedDeclarations(node) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            // if localSymbol is defined on node then node itself is exported - check is required
+            var symbol = node.localSymbol;
+            if (!symbol) {
+                // local symbol is undefined => this declaration is non-exported.
+                // however symbol might contain other declarations that are exported
+                symbol = getSymbolOfNode(node);
+                if (!(symbol.flags & 7340032 /* Export */)) {
+                    // this is a pure local symbol (all declarations are non-exported) - no need to check anything
+                    return;
+                }
+            }
+            // run the check only for the first declaration in the list
+            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
+                return;
+            }
+            // we use SymbolFlags.ExportValue, SymbolFlags.ExportType and SymbolFlags.ExportNamespace
+            // to denote disjoint declarationSpaces (without making new enum type).
+            var exportedDeclarationSpaces = 0 /* None */;
+            var nonExportedDeclarationSpaces = 0 /* None */;
+            var defaultExportedDeclarationSpaces = 0 /* None */;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var d = _a[_i];
+                var declarationSpaces = getDeclarationSpaces(d);
+                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 /* Export */ | 512 /* Default */);
+                if (effectiveDeclarationFlags & 1 /* Export */) {
+                    if (effectiveDeclarationFlags & 512 /* Default */) {
+                        defaultExportedDeclarationSpaces |= declarationSpaces;
+                    }
+                    else {
+                        exportedDeclarationSpaces |= declarationSpaces;
+                    }
+                }
+                else {
+                    nonExportedDeclarationSpaces |= declarationSpaces;
+                }
+            }
+            // Spaces for anything not declared a 'default export'.
+            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
+            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
+                // declaration spaces for exported and non-exported declarations intersect
+                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
+                    var d = _c[_b];
+                    var declarationSpaces = getDeclarationSpaces(d);
+                    // Only error on the declarations that contributed to the intersecting spaces.
+                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
+                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
+                    }
+                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
+                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
+                    }
+                }
+            }
+            function getDeclarationSpaces(d) {
+                switch (d.kind) {
+                    case 222 /* InterfaceDeclaration */:
+                        return 2097152 /* ExportType */;
+                    case 225 /* ModuleDeclaration */:
+                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0 /* NonInstantiated */
+                            ? 4194304 /* ExportNamespace */ | 1048576 /* ExportValue */
+                            : 4194304 /* ExportNamespace */;
+                    case 221 /* ClassDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                        return 2097152 /* ExportType */ | 1048576 /* ExportValue */;
+                    case 229 /* ImportEqualsDeclaration */:
+                        var result_1 = 0;
+                        var target = resolveAlias(getSymbolOfNode(d));
+                        ts.forEach(target.declarations, function (d) { result_1 |= getDeclarationSpaces(d); });
+                        return result_1;
+                    default:
+                        return 1048576 /* ExportValue */;
+                }
+            }
+        }
+        function checkNonThenableType(type, location, message) {
+            type = getWidenedType(type);
+            if (!isTypeAny(type) && isTypeAssignableTo(type, getGlobalThenableType())) {
+                if (location) {
+                    if (!message) {
+                        message = ts.Diagnostics.Operand_for_await_does_not_have_a_valid_callable_then_member;
+                    }
+                    error(location, message);
+                }
+                return unknownType;
+            }
+            return type;
+        }
+        /**
+          * Gets the "promised type" of a promise.
+          * @param type The type of the promise.
+          * @remarks The "promised type" of a type is the type of the "value" parameter of the "onfulfilled" callback.
+          */
+        function getPromisedType(promise) {
+            //
+            //  { // promise
+            //      then( // thenFunction
+            //          onfulfilled: ( // onfulfilledParameterType
+            //              value: T // valueParameterType
+            //          ) => any
+            //      ): any;
+            //  }
+            //
+            if (promise.flags & 1 /* Any */) {
+                return undefined;
+            }
+            if ((promise.flags & 4096 /* Reference */) && promise.target === tryGetGlobalPromiseType()) {
+                return promise.typeArguments[0];
+            }
+            var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType();
+            if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) {
+                return undefined;
+            }
+            var thenFunction = getTypeOfPropertyOfType(promise, "then");
+            if (thenFunction && (thenFunction.flags & 1 /* Any */)) {
+                return undefined;
+            }
+            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0 /* Call */) : emptyArray;
+            if (thenSignatures.length === 0) {
+                return undefined;
+            }
+            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072 /* NEUndefined */);
+            if (onfulfilledParameterType.flags & 1 /* Any */) {
+                return undefined;
+            }
+            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0 /* Call */);
+            if (onfulfilledParameterSignatures.length === 0) {
+                return undefined;
+            }
+            var valueParameterType = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature));
+            return valueParameterType;
+        }
+        function getTypeOfFirstParameterOfSignature(signature) {
+            return getTypeAtPosition(signature, 0);
+        }
+        /**
+          * Gets the "awaited type" of a type.
+          * @param type The type to await.
+          * @remarks The "awaited type" of an expression is its "promised type" if the expression is a
+          * Promise-like type; otherwise, it is the type of the expression. This is used to reflect
+          * The runtime behavior of the `await` keyword.
+          */
+        function getAwaitedType(type) {
+            return checkAwaitedType(type, /*location*/ undefined, /*message*/ undefined);
+        }
+        function checkAwaitedType(type, location, message) {
+            return checkAwaitedTypeWorker(type);
+            function checkAwaitedTypeWorker(type) {
+                if (type.flags & 16384 /* Union */) {
+                    var types = [];
+                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                        var constituentType = _a[_i];
+                        types.push(checkAwaitedTypeWorker(constituentType));
+                    }
+                    return getUnionType(types);
+                }
+                else {
+                    var promisedType = getPromisedType(type);
+                    if (promisedType === undefined) {
+                        // The type was not a PromiseLike, so it could not be unwrapped any further.
+                        // As long as the type does not have a callable "then" property, it is
+                        // safe to return the type; otherwise, an error will have been reported in
+                        // the call to checkNonThenableType and we will return unknownType.
+                        //
+                        // An example of a non-promise "thenable" might be:
+                        //
+                        //  await { then(): void {} }
+                        //
+                        // The "thenable" does not match the minimal definition for a PromiseLike. When
+                        // a Promise/A+-compatible or ES6 promise tries to adopt this value, the promise
+                        // will never settle. We treat this as an error to help flag an early indicator
+                        // of a runtime problem. If the user wants to return this value from an async
+                        // function, they would need to wrap it in some other value. If they want it to
+                        // be treated as a promise, they can cast to <any>.
+                        return checkNonThenableType(type, location, message);
+                    }
+                    else {
+                        if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
+                            // We have a bad actor in the form of a promise whose promised type is
+                            // the same promise type, or a mutually recursive promise. Return the
+                            // unknown type as we cannot guess the shape. If this were the actual
+                            // case in the JavaScript, this Promise would never resolve.
+                            //
+                            // An example of a bad actor with a singly-recursive promise type might
+                            // be:
+                            //
+                            //  interface BadPromise {
+                            //      then(
+                            //          onfulfilled: (value: BadPromise) => any,
+                            //          onrejected: (error: any) => any): BadPromise;
+                            //  }
+                            //
+                            // The above interface will pass the PromiseLike check, and return a
+                            // promised type of `BadPromise`. Since this is a self reference, we
+                            // don't want to keep recursing ad infinitum.
+                            //
+                            // An example of a bad actor in the form of a mutually-recursive
+                            // promise type might be:
+                            //
+                            //  interface BadPromiseA {
+                            //      then(
+                            //          onfulfilled: (value: BadPromiseB) => any,
+                            //          onrejected: (error: any) => any): BadPromiseB;
+                            //  }
+                            //
+                            //  interface BadPromiseB {
+                            //      then(
+                            //          onfulfilled: (value: BadPromiseA) => any,
+                            //          onrejected: (error: any) => any): BadPromiseA;
+                            //  }
+                            //
+                            if (location) {
+                                error(location, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method, symbolToString(type.symbol));
+                            }
+                            return unknownType;
+                        }
+                        // Keep track of the type we're about to unwrap to avoid bad recursive promise types.
+                        // See the comments above for more information.
+                        awaitedTypeStack.push(type.id);
+                        var awaitedType = checkAwaitedTypeWorker(promisedType);
+                        awaitedTypeStack.pop();
+                        return awaitedType;
+                    }
+                }
+            }
+        }
+        /**
+         * Checks that the return type provided is an instantiation of the global Promise<T> type
+         * and returns the awaited type of the return type.
+         *
+         * @param returnType The return type of a FunctionLikeDeclaration
+         * @param location The node on which to report the error.
+         */
+        function checkCorrectPromiseType(returnType, location) {
+            if (returnType === unknownType) {
+                // The return type already had some other error, so we ignore and return
+                // the unknown type.
+                return unknownType;
+            }
+            var globalPromiseType = getGlobalPromiseType();
+            if (globalPromiseType === emptyGenericType
+                || globalPromiseType === getTargetType(returnType)) {
+                // Either we couldn't resolve the global promise type, which would have already
+                // reported an error, or we could resolve it and the return type is a valid type
+                // reference to the global type. In either case, we return the awaited type for
+                // the return type.
+                return checkAwaitedType(returnType, location, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+            }
+            // The promise type was not a valid type reference to the global promise type, so we
+            // report an error and return the unknown type.
+            error(location, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
+            return unknownType;
+        }
+        /**
+          * Checks the return type of an async function to ensure it is a compatible
+          * Promise implementation.
+          * @param node The signature to check
+          * @param returnType The return type for the function
+          * @remarks
+          * This checks that an async function has a valid Promise-compatible return type,
+          * and returns the *awaited type* of the promise. An async function has a valid
+          * Promise-compatible return type if the resolved value of the return type has a
+          * construct signature that takes in an `initializer` function that in turn supplies
+          * a `resolve` function as one of its arguments and results in an object with a
+          * callable `then` signature.
+          */
+        function checkAsyncFunctionReturnType(node) {
+            if (languageVersion >= 2 /* ES6 */) {
+                var returnType = getTypeFromTypeNode(node.type);
+                return checkCorrectPromiseType(returnType, node.type);
+            }
+            var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType();
+            if (globalPromiseConstructorLikeType === emptyObjectType) {
+                // If we couldn't resolve the global PromiseConstructorLike type we cannot verify
+                // compatibility with __awaiter.
+                return unknownType;
+            }
+            // As part of our emit for an async function, we will need to emit the entity name of
+            // the return type annotation as an expression. To meet the necessary runtime semantics
+            // for __awaiter, we must also check that the type of the declaration (e.g. the static
+            // side or "constructor" of the promise type) is compatible `PromiseConstructorLike`.
+            //
+            // An example might be (from lib.es6.d.ts):
+            //
+            //  interface Promise<T> { ... }
+            //  interface PromiseConstructor {
+            //      new <T>(...): Promise<T>;
+            //  }
+            //  declare var Promise: PromiseConstructor;
+            //
+            // When an async function declares a return type annotation of `Promise<T>`, we
+            // need to get the type of the `Promise` variable declaration above, which would
+            // be `PromiseConstructor`.
+            //
+            // The same case applies to a class:
+            //
+            //  declare class Promise<T> {
+            //      constructor(...);
+            //      then<U>(...): Promise<U>;
+            //  }
+            //
+            // When we get the type of the `Promise` symbol here, we get the type of the static
+            // side of the `Promise` class, which would be `{ new <T>(...): Promise<T> }`.
+            var promiseType = getTypeFromTypeNode(node.type);
+            if (promiseType === unknownType && compilerOptions.isolatedModules) {
+                // If we are compiling with isolatedModules, we may not be able to resolve the
+                // type as a value. As such, we will just return unknownType;
+                return unknownType;
+            }
+            var promiseConstructor = getNodeLinks(node.type).resolvedSymbol;
+            if (!promiseConstructor || !symbolIsValue(promiseConstructor)) {
+                var typeName = promiseConstructor
+                    ? symbolToString(promiseConstructor)
+                    : typeToString(promiseType);
+                error(node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName);
+                return unknownType;
+            }
+            // If the Promise constructor, resolved locally, is an alias symbol we should mark it as referenced.
+            checkReturnTypeAnnotationAsExpression(node);
+            // Validate the promise constructor type.
+            var promiseConstructorType = getTypeOfSymbol(promiseConstructor);
+            if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) {
+                return unknownType;
+            }
+            // Verify there is no local declaration that could collide with the promise constructor.
+            var promiseName = ts.getEntityNameFromTypeNode(node.type);
+            var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName);
+            var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455 /* Value */);
+            if (rootSymbol) {
+                error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor));
+                return unknownType;
+            }
+            // Get and return the awaited type of the return type.
+            return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+        }
+        /** Check a decorator */
+        function checkDecorator(node) {
+            var signature = getResolvedSignature(node);
+            var returnType = getReturnTypeOfSignature(signature);
+            if (returnType.flags & 1 /* Any */) {
+                return;
+            }
+            var expectedReturnType;
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            var errorInfo;
+            switch (node.parent.kind) {
+                case 221 /* ClassDeclaration */:
+                    var classSymbol = getSymbolOfNode(node.parent);
+                    var classConstructorType = getTypeOfSymbol(classSymbol);
+                    expectedReturnType = getUnionType([classConstructorType, voidType]);
+                    break;
+                case 142 /* Parameter */:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 145 /* PropertyDeclaration */:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 147 /* MethodDeclaration */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                    var methodType = getTypeOfNode(node.parent);
+                    var descriptorType = createTypedPropertyDescriptorType(methodType);
+                    expectedReturnType = getUnionType([descriptorType, voidType]);
+                    break;
+            }
+            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
+        }
+        /** Checks a type reference node as an expression. */
+        function checkTypeNodeAsExpression(node) {
+            // When we are emitting type metadata for decorators, we need to try to check the type
+            // as if it were an expression so that we can emit the type in a value position when we
+            // serialize the type metadata.
+            if (node && node.kind === 155 /* TypeReference */) {
+                var root = getFirstIdentifier(node.typeName);
+                var meaning = root.parent.kind === 155 /* TypeReference */ ? 793056 /* Type */ : 1536 /* Namespace */;
+                // Resolve type so we know which symbol is referenced
+                var rootSymbol = resolveName(root, root.text, meaning | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+                // Resolved symbol is alias
+                if (rootSymbol && rootSymbol.flags & 8388608 /* Alias */) {
+                    var aliasTarget = resolveAlias(rootSymbol);
+                    // If alias has value symbol - mark alias as referenced
+                    if (aliasTarget.flags & 107455 /* Value */ && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
+                        markAliasSymbolAsReferenced(rootSymbol);
+                    }
+                }
+            }
+        }
+        /**
+          * Checks the type annotation of an accessor declaration or property declaration as
+          * an expression if it is a type reference to a type with a value declaration.
+          */
+        function checkTypeAnnotationAsExpression(node) {
+            checkTypeNodeAsExpression(node.type);
+        }
+        function checkReturnTypeAnnotationAsExpression(node) {
+            checkTypeNodeAsExpression(node.type);
+        }
+        /** Checks the type annotation of the parameters of a function/method or the constructor of a class as expressions */
+        function checkParameterTypeAnnotationsAsExpressions(node) {
+            // ensure all type annotations with a value declaration are checked as an expression
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                checkTypeAnnotationAsExpression(parameter);
+            }
+        }
+        /** Check the decorators of a node */
+        function checkDecorators(node) {
+            if (!node.decorators) {
+                return;
+            }
+            // skip this check for nodes that cannot have decorators. These should have already had an error reported by
+            // checkGrammarDecorators.
+            if (!ts.nodeCanBeDecorated(node)) {
+                return;
+            }
+            if (!compilerOptions.experimentalDecorators) {
+                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
+            }
+            if (compilerOptions.emitDecoratorMetadata) {
+                // we only need to perform these checks if we are emitting serialized type metadata for the target of a decorator.
+                switch (node.kind) {
+                    case 221 /* ClassDeclaration */:
+                        var constructor = ts.getFirstConstructorWithBody(node);
+                        if (constructor) {
+                            checkParameterTypeAnnotationsAsExpressions(constructor);
+                        }
+                        break;
+                    case 147 /* MethodDeclaration */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        checkParameterTypeAnnotationsAsExpressions(node);
+                        checkReturnTypeAnnotationAsExpression(node);
+                        break;
+                    case 145 /* PropertyDeclaration */:
+                    case 142 /* Parameter */:
+                        checkTypeAnnotationAsExpression(node);
+                        break;
+                }
+            }
+            ts.forEach(node.decorators, checkDecorator);
+        }
+        function checkFunctionDeclaration(node) {
+            if (produceDiagnostics) {
+                checkFunctionOrMethodDeclaration(node) || checkGrammarForGenerator(node);
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+        }
+        function checkFunctionOrMethodDeclaration(node) {
+            checkDecorators(node);
+            checkSignatureDeclaration(node);
+            var isAsync = ts.isAsyncFunctionLike(node);
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name && node.name.kind === 140 /* ComputedPropertyName */) {
+                // This check will account for methods in class/interface declarations,
+                // as well as accessors in classes/object literals
+                checkComputedPropertyName(node.name);
+            }
+            if (!ts.hasDynamicName(node)) {
+                // first we want to check the local symbol that contain this declaration
+                // - if node.localSymbol !== undefined - this is current declaration is exported and localSymbol points to the local symbol
+                // - if node.localSymbol === undefined - this node is non-exported so we can just pick the result of getSymbolOfNode
+                var symbol = getSymbolOfNode(node);
+                var localSymbol = node.localSymbol || symbol;
+                // Since the javascript won't do semantic analysis like typescript,
+                // if the javascript file comes before the typescript file and both contain same name functions,
+                // checkFunctionOrConstructorSymbol wouldn't be called if we didnt ignore javascript function.
+                var firstDeclaration = ts.forEach(localSymbol.declarations, 
+                // Get first non javascript function declaration
+                function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
+                    declaration : undefined; });
+                // Only type check the symbol once
+                if (node === firstDeclaration) {
+                    checkFunctionOrConstructorSymbol(localSymbol);
+                }
+                if (symbol.parent) {
+                    // run check once for the first declaration
+                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
+                        // run check on export symbol to check that modifiers agree across all exported declarations
+                        checkFunctionOrConstructorSymbol(symbol);
+                    }
+                }
+            }
+            checkSourceElement(node.body);
+            if (!node.asteriskToken) {
+                var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (produceDiagnostics && !node.type) {
+                // Report an implicit any error if there is no body, no explicit return type, and node is not a private method
+                // in an ambient context
+                if (compilerOptions.noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
+                    reportImplicitAnyError(node, anyType);
+                }
+                if (node.asteriskToken && ts.nodeIsPresent(node.body)) {
+                    // A generator with a body and no type annotation can still cause errors. It can error if the
+                    // yielded values have no common supertype, or it can give an implicit any error if it has no
+                    // yielded values. The only way to trigger these errors is to try checking its return type.
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+                }
+            }
+        }
+        function checkBlock(node) {
+            // Grammar checking for SyntaxKind.Block
+            if (node.kind === 199 /* Block */) {
+                checkGrammarStatementInAmbientContext(node);
+            }
+            ts.forEach(node.statements, checkSourceElement);
+        }
+        function checkCollisionWithArgumentsInGeneratedCode(node) {
+            // no rest parameters \ declaration context \ overload - no codegen impact
+            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
+                return;
+            }
+            ts.forEach(node.parameters, function (p) {
+                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
+                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
+                }
+            });
+        }
+        function needCollisionCheckForIdentifier(node, identifier, name) {
+            if (!(identifier && identifier.text === name)) {
+                return false;
+            }
+            if (node.kind === 145 /* PropertyDeclaration */ ||
+                node.kind === 144 /* PropertySignature */ ||
+                node.kind === 147 /* MethodDeclaration */ ||
+                node.kind === 146 /* MethodSignature */ ||
+                node.kind === 149 /* GetAccessor */ ||
+                node.kind === 150 /* SetAccessor */) {
+                // it is ok to have member named '_super' or '_this' - member access is always qualified
+                return false;
+            }
+            if (ts.isInAmbientContext(node)) {
+                // ambient context - no codegen impact
+                return false;
+            }
+            var root = ts.getRootDeclaration(node);
+            if (root.kind === 142 /* Parameter */ && ts.nodeIsMissing(root.parent.body)) {
+                // just an overload - no codegen impact
+                return false;
+            }
+            return true;
+        }
+        function checkCollisionWithCapturedThisVariable(node, name) {
+            if (needCollisionCheckForIdentifier(node, name, "_this")) {
+                potentialThisCollisions.push(node);
+            }
+        }
+        // this function will run after checking the source file so 'CaptureThis' is correct for all nodes
+        function checkIfThisIsCapturedInEnclosingScope(node) {
+            var current = node;
+            while (current) {
+                if (getNodeCheckFlags(current) & 4 /* CaptureThis */) {
+                    var isDeclaration_1 = node.kind !== 69 /* Identifier */;
+                    if (isDeclaration_1) {
+                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                    }
+                    else {
+                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
+                    }
+                    return;
+                }
+                current = current.parent;
+            }
+        }
+        function checkCollisionWithCapturedSuperVariable(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
+                return;
+            }
+            // bubble up and find containing type
+            var enclosingClass = ts.getContainingClass(node);
+            // if containing type was not found or it is ambient - exit (no codegen)
+            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
+                return;
+            }
+            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
+                var isDeclaration_2 = node.kind !== 69 /* Identifier */;
+                if (isDeclaration_2) {
+                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
+                }
+                else {
+                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
+                }
+            }
+        }
+        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
+                return;
+            }
+            // Uninstantiated modules shouldnt do this check
+            if (node.kind === 225 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+                return;
+            }
+            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent)) {
+                // If the declaration happens to be in external module, report error that require and exports are reserved keywords
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            }
+        }
+        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "Promise")) {
+                return;
+            }
+            // Uninstantiated modules shouldnt do this check
+            if (node.kind === 225 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+                return;
+            }
+            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent) && parent.flags & 2097152 /* HasAsyncFunctions */) {
+                // If the declaration happens to be in external module, report error that Promise is a reserved identifier.
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            }
+        }
+        function checkVarDeclaredNamesNotShadowed(node) {
+            // - ScriptBody : StatementList
+            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
+            // also occurs in the VarDeclaredNames of StatementList.
+            // - Block : { StatementList }
+            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
+            // also occurs in the VarDeclaredNames of StatementList.
+            // Variable declarations are hoisted to the top of their function scope. They can shadow
+            // block scoped declarations, which bind tighter. this will not be flagged as duplicate definition
+            // by the binder as the declaration scope is different.
+            // A non-initialized declaration is a no-op as the block declaration will resolve before the var
+            // declaration. the problem is if the declaration has an initializer. this will act as a write to the
+            // block declared value. this is fine for let, but not const.
+            // Only consider declarations with initializers, uninitialized const declarations will not
+            // step on a let/const variable.
+            // Do not consider const and const declarations, as duplicate block-scoped declarations
+            // are handled by the binder.
+            // We are only looking for const declarations that step on let\const declarations from a
+            // different scope. e.g.:
+            //      {
+            //          const x = 0; // localDeclarationSymbol obtained after name resolution will correspond to this declaration
+            //          const x = 0; // symbol for this declaration will be 'symbol'
+            //      }
+            // skip block-scoped variables and parameters
+            if ((ts.getCombinedNodeFlags(node) & 3072 /* BlockScoped */) !== 0 || ts.isParameterDeclaration(node)) {
+                return;
+            }
+            // skip variable declarations that don't have initializers
+            // NOTE: in ES6 spec initializer is required in variable declarations where name is binding pattern
+            // so we'll always treat binding elements as initialized
+            if (node.kind === 218 /* VariableDeclaration */ && !node.initializer) {
+                return;
+            }
+            var symbol = getSymbolOfNode(node);
+            if (symbol.flags & 1 /* FunctionScopedVariable */) {
+                var localDeclarationSymbol = resolveName(node, node.name.text, 3 /* Variable */, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
+                if (localDeclarationSymbol &&
+                    localDeclarationSymbol !== symbol &&
+                    localDeclarationSymbol.flags & 2 /* BlockScopedVariable */) {
+                    if (getDeclarationFlagsFromSymbol(localDeclarationSymbol) & 3072 /* BlockScoped */) {
+                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 219 /* VariableDeclarationList */);
+                        var container = varDeclList.parent.kind === 200 /* VariableStatement */ && varDeclList.parent.parent
+                            ? varDeclList.parent.parent
+                            : undefined;
+                        // names of block-scoped and function scoped variables can collide only
+                        // if block scoped variable is defined in the function\module\source file scope (because of variable hoisting)
+                        var namesShareScope = container &&
+                            (container.kind === 199 /* Block */ && ts.isFunctionLike(container.parent) ||
+                                container.kind === 226 /* ModuleBlock */ ||
+                                container.kind === 225 /* ModuleDeclaration */ ||
+                                container.kind === 256 /* SourceFile */);
+                        // here we know that function scoped variable is shadowed by block scoped one
+                        // if they are defined in the same scope - binder has already reported redeclaration error
+                        // otherwise if variable has an initializer - show error that initialization will fail
+                        // since LHS will be block scoped name instead of function scoped
+                        if (!namesShareScope) {
+                            var name_17 = symbolToString(localDeclarationSymbol);
+                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_17, name_17);
+                        }
+                    }
+                }
+            }
+        }
+        // Check that a parameter initializer contains no references to parameters declared to the right of itself
+        function checkParameterInitializer(node) {
+            if (ts.getRootDeclaration(node).kind !== 142 /* Parameter */) {
+                return;
+            }
+            var func = ts.getContainingFunction(node);
+            visit(node.initializer);
+            function visit(n) {
+                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
+                    // do not dive in types
+                    // skip declaration names (i.e. in object literal expressions)
+                    return;
+                }
+                if (n.kind === 172 /* PropertyAccessExpression */) {
+                    // skip property names in property access expression
+                    return visit(n.expression);
+                }
+                else if (n.kind === 69 /* Identifier */) {
+                    // check FunctionLikeDeclaration.locals (stores parameters\function local variable)
+                    // if it contains entry with a specified name
+                    var symbol = resolveName(n, n.text, 107455 /* Value */ | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
+                        return;
+                    }
+                    if (symbol.valueDeclaration === node) {
+                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
+                        return;
+                    }
+                    // locals map for function contain both parameters and function locals
+                    // so we need to do a bit of extra work to check if reference is legal
+                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (enclosingContainer === func) {
+                        if (symbol.valueDeclaration.kind === 142 /* Parameter */) {
+                            // it is ok to reference parameter in initializer if either
+                            // - parameter is located strictly on the left of current parameter declaration
+                            if (symbol.valueDeclaration.pos < node.pos) {
+                                return;
+                            }
+                            // - parameter is wrapped in function-like entity
+                            var current = n;
+                            while (current !== node.initializer) {
+                                if (ts.isFunctionLike(current.parent)) {
+                                    return;
+                                }
+                                // computed property names/initializers in instance property declaration of class like entities
+                                // are executed in constructor and thus deferred
+                                if (current.parent.kind === 145 /* PropertyDeclaration */ &&
+                                    !(current.parent.flags & 32 /* Static */) &&
+                                    ts.isClassLike(current.parent.parent)) {
+                                    return;
+                                }
+                                current = current.parent;
+                            }
+                        }
+                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
+                    }
+                }
+                else {
+                    return ts.forEachChild(n, visit);
+                }
+            }
+        }
+        // Check variable, parameter, or property declaration
+        function checkVariableLikeDeclaration(node) {
+            checkDecorators(node);
+            checkSourceElement(node.type);
+            // For a computed property, just check the initializer and exit
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 140 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
+                if (node.initializer) {
+                    checkExpressionCached(node.initializer);
+                }
+            }
+            if (node.kind === 169 /* BindingElement */) {
+                // check computed properties inside property names of binding elements
+                if (node.propertyName && node.propertyName.kind === 140 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(node.propertyName);
+                }
+                // check private/protected variable access
+                var parent_11 = node.parent.parent;
+                var parentType = getTypeForBindingElementParent(parent_11);
+                var name_18 = node.propertyName || node.name;
+                var property = getPropertyOfType(parentType, getTextOfPropertyName(name_18));
+                if (parent_11.initializer && property && getParentOfSymbol(property)) {
+                    checkClassPropertyAccess(parent_11, parent_11.initializer, parentType, property);
+                }
+            }
+            // For a binding pattern, check contained binding elements
+            if (ts.isBindingPattern(node.name)) {
+                ts.forEach(node.name.elements, checkSourceElement);
+            }
+            // For a parameter declaration with an initializer, error and exit if the containing function doesn't have a body
+            if (node.initializer && ts.getRootDeclaration(node).kind === 142 /* Parameter */ && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
+                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
+                return;
+            }
+            // For a binding pattern, validate the initializer and exit
+            if (ts.isBindingPattern(node.name)) {
+                // Don't validate for-in initializer as it is already an error
+                if (node.initializer && node.parent.parent.kind !== 207 /* ForInStatement */) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, /*headMessage*/ undefined);
+                    checkParameterInitializer(node);
+                }
+                return;
+            }
+            var symbol = getSymbolOfNode(node);
+            var type = getTypeOfVariableOrParameterOrProperty(symbol);
+            if (node === symbol.valueDeclaration) {
+                // Node is the primary declaration of the symbol, just validate the initializer
+                // Don't validate for-in initializer as it is already an error
+                if (node.initializer && node.parent.parent.kind !== 207 /* ForInStatement */) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, /*headMessage*/ undefined);
+                    checkParameterInitializer(node);
+                }
+            }
+            else {
+                // Node is a secondary declaration, check that type is identical to primary declaration and check that
+                // initializer is consistent with type associated with the node
+                var declarationType = getWidenedTypeForVariableLikeDeclaration(node);
+                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
+                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
+                }
+                if (node.initializer) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
+                }
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                }
+            }
+            if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */) {
+                // We know we don't have a binding pattern or computed name here
+                checkExportsOnMergedDeclarations(node);
+                if (node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) {
+                    checkVarDeclaredNamesNotShadowed(node);
+                }
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+        }
+        function areDeclarationFlagsIdentical(left, right) {
+            if ((left.kind === 142 /* Parameter */ && right.kind === 218 /* VariableDeclaration */) ||
+                (left.kind === 218 /* VariableDeclaration */ && right.kind === 142 /* Parameter */)) {
+                // Differences in optionality between parameters and variables are allowed.
+                return true;
+            }
+            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
+                return false;
+            }
+            var interestingFlags = 8 /* Private */ |
+                16 /* Protected */ |
+                256 /* Async */ |
+                128 /* Abstract */ |
+                64 /* Readonly */ |
+                32 /* Static */;
+            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
+        }
+        function checkVariableDeclaration(node) {
+            checkGrammarVariableDeclaration(node);
+            return checkVariableLikeDeclaration(node);
+        }
+        function checkBindingElement(node) {
+            checkGrammarBindingElement(node);
+            return checkVariableLikeDeclaration(node);
+        }
+        function checkVariableStatement(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
+            ts.forEach(node.declarationList.declarations, checkSourceElement);
+        }
+        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
+            // We only disallow modifier on a method declaration if it is a property of object-literal-expression
+            if (node.modifiers && node.parent.kind === 171 /* ObjectLiteralExpression */) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    if (node.modifiers.length > 1) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                }
+                else {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                }
+            }
+        }
+        function checkExpressionStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+        }
+        function checkIfStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.thenStatement);
+            if (node.thenStatement.kind === 201 /* EmptyStatement */) {
+                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
+            }
+            checkSourceElement(node.elseStatement);
+        }
+        function checkDoStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkSourceElement(node.statement);
+            checkExpression(node.expression);
+        }
+        function checkWhileStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.statement);
+        }
+        function checkForStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.initializer && node.initializer.kind === 219 /* VariableDeclarationList */) {
+                    checkGrammarVariableDeclarationList(node.initializer);
+                }
+            }
+            if (node.initializer) {
+                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
+                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
+                }
+                else {
+                    checkExpression(node.initializer);
+                }
+            }
+            if (node.condition)
+                checkExpression(node.condition);
+            if (node.incrementor)
+                checkExpression(node.incrementor);
+            checkSourceElement(node.statement);
+        }
+        function checkForOfStatement(node) {
+            checkGrammarForInOrForOfStatement(node);
+            // Check the LHS and RHS
+            // If the LHS is a declaration, just check it as a variable declaration, which will in turn check the RHS
+            // via checkRightHandSideOfForOf.
+            // If the LHS is an expression, check the LHS, as a destructuring assignment or as a reference.
+            // Then check that the RHS is assignable to it.
+            if (node.initializer.kind === 219 /* VariableDeclarationList */) {
+                checkForInOrForOfVariableDeclaration(node);
+            }
+            else {
+                var varExpr = node.initializer;
+                var iteratedType = checkRightHandSideOfForOf(node.expression);
+                // There may be a destructuring assignment on the left side
+                if (varExpr.kind === 170 /* ArrayLiteralExpression */ || varExpr.kind === 171 /* ObjectLiteralExpression */) {
+                    // iteratedType may be undefined. In this case, we still want to check the structure of
+                    // varExpr, in particular making sure it's a valid LeftHandSideExpression. But we'd like
+                    // to short circuit the type relation checking as much as possible, so we pass the unknownType.
+                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
+                }
+                else {
+                    var leftType = checkExpression(varExpr);
+                    checkReferenceExpression(varExpr, /*invalidReferenceMessage*/ ts.Diagnostics.Invalid_left_hand_side_in_for_of_statement, 
+                    /*constantVariableMessage*/ ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property);
+                    // iteratedType will be undefined if the rightType was missing properties/signatures
+                    // required to get its iteratedType (like [Symbol.iterator] or next). This may be
+                    // because we accessed properties from anyType, or it may have led to an error inside
+                    // getElementTypeOfIterable.
+                    if (iteratedType) {
+                        checkTypeAssignableTo(iteratedType, leftType, varExpr, /*headMessage*/ undefined);
+                    }
+                }
+            }
+            checkSourceElement(node.statement);
+        }
+        function checkForInStatement(node) {
+            // Grammar checking
+            checkGrammarForInOrForOfStatement(node);
+            // TypeScript 1.0 spec  (April 2014): 5.4
+            // In a 'for-in' statement of the form
+            // for (let VarDecl in Expr) Statement
+            //   VarDecl must be a variable declaration without a type annotation that declares a variable of type Any,
+            //   and Expr must be an expression of type Any, an object type, or a type parameter type.
+            if (node.initializer.kind === 219 /* VariableDeclarationList */) {
+                var variable = node.initializer.declarations[0];
+                if (variable && ts.isBindingPattern(variable.name)) {
+                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                }
+                checkForInOrForOfVariableDeclaration(node);
+            }
+            else {
+                // In a 'for-in' statement of the form
+                // for (Var in Expr) Statement
+                //   Var must be an expression classified as a reference of type Any or the String primitive type,
+                //   and Expr must be an expression of type Any, an object type, or a type parameter type.
+                var varExpr = node.initializer;
+                var leftType = checkExpression(varExpr);
+                if (varExpr.kind === 170 /* ArrayLiteralExpression */ || varExpr.kind === 171 /* ObjectLiteralExpression */) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                }
+                else if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 /* StringLike */)) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
+                }
+                else {
+                    // run check only former check succeeded to avoid cascading errors
+                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_in_statement, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property);
+                }
+            }
+            var rightType = checkNonNullExpression(node.expression);
+            // unknownType is returned i.e. if node.expression is identifier whose name cannot be resolved
+            // in this case error about missing name is already reported - do not report extra one
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 /* ObjectType */ | 512 /* TypeParameter */)) {
+                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            checkSourceElement(node.statement);
+        }
+        function checkForInOrForOfVariableDeclaration(iterationStatement) {
+            var variableDeclarationList = iterationStatement.initializer;
+            // checkGrammarForInOrForOfStatement will check that there is exactly one declaration.
+            if (variableDeclarationList.declarations.length >= 1) {
+                var decl = variableDeclarationList.declarations[0];
+                checkVariableDeclaration(decl);
+            }
+        }
+        function checkRightHandSideOfForOf(rhsExpression) {
+            var expressionType = checkNonNullExpression(rhsExpression);
+            return checkIteratedTypeOrElementType(expressionType, rhsExpression, /*allowStringInput*/ true);
+        }
+        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput) {
+            if (isTypeAny(inputType)) {
+                return inputType;
+            }
+            if (languageVersion >= 2 /* ES6 */) {
+                return checkElementTypeOfIterable(inputType, errorNode);
+            }
+            if (allowStringInput) {
+                return checkElementTypeOfArrayOrString(inputType, errorNode);
+            }
+            if (isArrayLikeType(inputType)) {
+                var indexType = getIndexTypeOfType(inputType, 1 /* Number */);
+                if (indexType) {
+                    return indexType;
+                }
+            }
+            if (errorNode) {
+                error(errorNode, ts.Diagnostics.Type_0_is_not_an_array_type, typeToString(inputType));
+            }
+            return unknownType;
+        }
+        /**
+         * When errorNode is undefined, it means we should not report any errors.
+         */
+        function checkElementTypeOfIterable(iterable, errorNode) {
+            var elementType = getElementTypeOfIterable(iterable, errorNode);
+            // Now even though we have extracted the iteratedType, we will have to validate that the type
+            // passed in is actually an Iterable.
+            if (errorNode && elementType) {
+                checkTypeAssignableTo(iterable, createIterableType(elementType), errorNode);
+            }
+            return elementType || anyType;
+        }
+        /**
+         * We want to treat type as an iterable, and get the type it is an iterable of. The iterable
+         * must have the following structure (annotated with the names of the variables below):
+         *
+         * { // iterable
+         *     [Symbol.iterator]: { // iteratorFunction
+         *         (): Iterator<T>
+         *     }
+         * }
+         *
+         * T is the type we are after. At every level that involves analyzing return types
+         * of signatures, we union the return types of all the signatures.
+         *
+         * Another thing to note is that at any step of this process, we could run into a dead end,
+         * meaning either the property is missing, or we run into the anyType. If either of these things
+         * happens, we return undefined to signal that we could not find the iterated type. If a property
+         * is missing, and the previous step did not result in 'any', then we also give an error if the
+         * caller requested it. Then the caller can decide what to do in the case where there is no iterated
+         * type. This is different from returning anyType, because that would signify that we have matched the
+         * whole pattern and that T (above) is 'any'.
+         */
+        function getElementTypeOfIterable(type, errorNode) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            var typeAsIterable = type;
+            if (!typeAsIterable.iterableElementType) {
+                // As an optimization, if the type is instantiated directly using the globalIterableType (Iterable<number>),
+                // then just grab its type argument.
+                if ((type.flags & 4096 /* Reference */) && type.target === getGlobalIterableType()) {
+                    typeAsIterable.iterableElementType = type.typeArguments[0];
+                }
+                else {
+                    var iteratorFunction = getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator"));
+                    if (isTypeAny(iteratorFunction)) {
+                        return undefined;
+                    }
+                    var iteratorFunctionSignatures = iteratorFunction ? getSignaturesOfType(iteratorFunction, 0 /* Call */) : emptyArray;
+                    if (iteratorFunctionSignatures.length === 0) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
+                        }
+                        return undefined;
+                    }
+                    typeAsIterable.iterableElementType = getElementTypeOfIterator(getUnionType(ts.map(iteratorFunctionSignatures, getReturnTypeOfSignature)), errorNode);
+                }
+            }
+            return typeAsIterable.iterableElementType;
+        }
+        /**
+         * This function has very similar logic as getElementTypeOfIterable, except that it operates on
+         * Iterators instead of Iterables. Here is the structure:
+         *
+         *  { // iterator
+         *      next: { // iteratorNextFunction
+         *          (): { // iteratorNextResult
+         *              value: T // iteratorNextValue
+         *          }
+         *      }
+         *  }
+         *
+         */
+        function getElementTypeOfIterator(type, errorNode) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            var typeAsIterator = type;
+            if (!typeAsIterator.iteratorElementType) {
+                // As an optimization, if the type is instantiated directly using the globalIteratorType (Iterator<number>),
+                // then just grab its type argument.
+                if ((type.flags & 4096 /* Reference */) && type.target === getGlobalIteratorType()) {
+                    typeAsIterator.iteratorElementType = type.typeArguments[0];
+                }
+                else {
+                    var iteratorNextFunction = getTypeOfPropertyOfType(type, "next");
+                    if (isTypeAny(iteratorNextFunction)) {
+                        return undefined;
+                    }
+                    var iteratorNextFunctionSignatures = iteratorNextFunction ? getSignaturesOfType(iteratorNextFunction, 0 /* Call */) : emptyArray;
+                    if (iteratorNextFunctionSignatures.length === 0) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.An_iterator_must_have_a_next_method);
+                        }
+                        return undefined;
+                    }
+                    var iteratorNextResult = getUnionType(ts.map(iteratorNextFunctionSignatures, getReturnTypeOfSignature));
+                    if (isTypeAny(iteratorNextResult)) {
+                        return undefined;
+                    }
+                    var iteratorNextValue = getTypeOfPropertyOfType(iteratorNextResult, "value");
+                    if (!iteratorNextValue) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
+                        }
+                        return undefined;
+                    }
+                    typeAsIterator.iteratorElementType = iteratorNextValue;
+                }
+            }
+            return typeAsIterator.iteratorElementType;
+        }
+        function getElementTypeOfIterableIterator(type) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            // As an optimization, if the type is instantiated directly using the globalIterableIteratorType (IterableIterator<number>),
+            // then just grab its type argument.
+            if ((type.flags & 4096 /* Reference */) && type.target === getGlobalIterableIteratorType()) {
+                return type.typeArguments[0];
+            }
+            return getElementTypeOfIterable(type, /*errorNode*/ undefined) ||
+                getElementTypeOfIterator(type, /*errorNode*/ undefined);
+        }
+        /**
+         * This function does the following steps:
+         *   1. Break up arrayOrStringType (possibly a union) into its string constituents and array constituents.
+         *   2. Take the element types of the array constituents.
+         *   3. Return the union of the element types, and string if there was a string constituent.
+         *
+         * For example:
+         *     string -> string
+         *     number[] -> number
+         *     string[] | number[] -> string | number
+         *     string | number[] -> string | number
+         *     string | string[] | number[] -> string | number
+         *
+         * It also errors if:
+         *   1. Some constituent is neither a string nor an array.
+         *   2. Some constituent is a string and target is less than ES5 (because in ES3 string is not indexable).
+         */
+        function checkElementTypeOfArrayOrString(arrayOrStringType, errorNode) {
+            ts.Debug.assert(languageVersion < 2 /* ES6 */);
+            // After we remove all types that are StringLike, we will know if there was a string constituent
+            // based on whether the remaining type is the same as the initial type.
+            var arrayType = arrayOrStringType;
+            if (arrayOrStringType.flags & 16384 /* Union */) {
+                arrayType = getUnionType(ts.filter(arrayOrStringType.types, function (t) { return !(t.flags & 258 /* StringLike */); }));
+            }
+            else if (arrayOrStringType.flags & 258 /* StringLike */) {
+                arrayType = neverType;
+            }
+            var hasStringConstituent = arrayOrStringType !== arrayType;
+            var reportedError = false;
+            if (hasStringConstituent) {
+                if (languageVersion < 1 /* ES5 */) {
+                    error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
+                    reportedError = true;
+                }
+                // Now that we've removed all the StringLike types, if no constituents remain, then the entire
+                // arrayOrStringType was a string.
+                if (arrayType === neverType) {
+                    return stringType;
+                }
+            }
+            if (!isArrayLikeType(arrayType)) {
+                if (!reportedError) {
+                    // Which error we report depends on whether there was a string constituent. For example,
+                    // if the input type is number | string, we want to say that number is not an array type.
+                    // But if the input was just number, we want to say that number is not an array type
+                    // or a string type.
+                    var diagnostic = hasStringConstituent
+                        ? ts.Diagnostics.Type_0_is_not_an_array_type
+                        : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
+                    error(errorNode, diagnostic, typeToString(arrayType));
+                }
+                return hasStringConstituent ? stringType : unknownType;
+            }
+            var arrayElementType = getIndexTypeOfType(arrayType, 1 /* Number */) || unknownType;
+            if (hasStringConstituent) {
+                // This is just an optimization for the case where arrayOrStringType is string | string[]
+                if (arrayElementType.flags & 258 /* StringLike */) {
+                    return stringType;
+                }
+                return getUnionType([arrayElementType, stringType]);
+            }
+            return arrayElementType;
+        }
+        function checkBreakOrContinueStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
+            // TODO: Check that target label is valid
+        }
+        function isGetAccessorWithAnnotatedSetAccessor(node) {
+            return !!(node.kind === 149 /* GetAccessor */ && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 150 /* SetAccessor */)));
+        }
+        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
+            var unwrappedReturnType = ts.isAsyncFunctionLike(func) ? getPromisedType(returnType) : returnType;
+            return maybeTypeOfKind(unwrappedReturnType, 16 /* Void */ | 1 /* Any */);
+        }
+        function checkReturnStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                var functionBlock = ts.getContainingFunction(node);
+                if (!functionBlock) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
+                }
+            }
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var signature = getSignatureFromDeclaration(func);
+                var returnType = getReturnTypeOfSignature(signature);
+                if (strictNullChecks || node.expression || returnType === neverType) {
+                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
+                    if (func.asteriskToken) {
+                        // A generator does not need its return expressions checked against its return type.
+                        // Instead, the yield expressions are checked against the element type.
+                        // TODO: Check return expressions of generators when return type tracking is added
+                        // for generators.
+                        return;
+                    }
+                    if (func.kind === 150 /* SetAccessor */) {
+                        if (node.expression) {
+                            error(node.expression, ts.Diagnostics.Setters_cannot_return_a_value);
+                        }
+                    }
+                    else if (func.kind === 148 /* Constructor */) {
+                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node.expression)) {
+                            error(node.expression, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
+                        }
+                    }
+                    else if (func.type || isGetAccessorWithAnnotatedSetAccessor(func)) {
+                        if (ts.isAsyncFunctionLike(func)) {
+                            var promisedType = getPromisedType(returnType);
+                            var awaitedType = checkAwaitedType(exprType, node.expression || node, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                            if (promisedType) {
+                                // If the function has a return type, but promisedType is
+                                // undefined, an error will be reported in checkAsyncFunctionReturnType
+                                // so we don't need to report one here.
+                                checkTypeAssignableTo(awaitedType, promisedType, node.expression || node);
+                            }
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnType, node.expression || node);
+                        }
+                    }
+                }
+                else if (func.kind !== 148 /* Constructor */ && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
+                    // The function has a return type, but the return statement doesn't have an expression.
+                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
+                }
+            }
+        }
+        function checkWithStatement(node) {
+            // Grammar checking for withStatement
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.flags & 33554432 /* AwaitContext */) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
+                }
+            }
+            checkExpression(node.expression);
+            error(node.expression, ts.Diagnostics.All_symbols_within_a_with_block_will_be_resolved_to_any);
+        }
+        function checkSwitchStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            var firstDefaultClause;
+            var hasDuplicateDefaultClause = false;
+            var expressionType = checkExpression(node.expression);
+            ts.forEach(node.caseBlock.clauses, function (clause) {
+                // Grammar check for duplicate default clauses, skip if we already report duplicate default clause
+                if (clause.kind === 250 /* DefaultClause */ && !hasDuplicateDefaultClause) {
+                    if (firstDefaultClause === undefined) {
+                        firstDefaultClause = clause;
+                    }
+                    else {
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
+                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
+                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
+                        hasDuplicateDefaultClause = true;
+                    }
+                }
+                if (produceDiagnostics && clause.kind === 249 /* CaseClause */) {
+                    var caseClause = clause;
+                    // TypeScript 1.0 spec (April 2014): 5.9
+                    // In a 'switch' statement, each 'case' expression must be of a type that is comparable
+                    // to or from the type of the 'switch' expression.
+                    var caseType = checkExpression(caseClause.expression);
+                    if (!isTypeEqualityComparableTo(expressionType, caseType)) {
+                        // expressionType is not comparable to caseType, try the reversed check and report errors if it fails
+                        checkTypeComparableTo(caseType, expressionType, caseClause.expression, /*headMessage*/ undefined);
+                    }
+                }
+                ts.forEach(clause.statements, checkSourceElement);
+            });
+        }
+        function checkLabeledStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                var current = node.parent;
+                while (current) {
+                    if (ts.isFunctionLike(current)) {
+                        break;
+                    }
+                    if (current.kind === 214 /* LabeledStatement */ && current.label.text === node.label.text) {
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
+                        break;
+                    }
+                    current = current.parent;
+                }
+            }
+            // ensure that label is unique
+            checkSourceElement(node.statement);
+        }
+        function checkThrowStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.expression === undefined) {
+                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
+                }
+            }
+            if (node.expression) {
+                checkExpression(node.expression);
+            }
+        }
+        function checkTryStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkBlock(node.tryBlock);
+            var catchClause = node.catchClause;
+            if (catchClause) {
+                // Grammar checking
+                if (catchClause.variableDeclaration) {
+                    if (catchClause.variableDeclaration.name.kind !== 69 /* Identifier */) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.name, ts.Diagnostics.Catch_clause_variable_name_must_be_an_identifier);
+                    }
+                    else if (catchClause.variableDeclaration.type) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
+                    }
+                    else if (catchClause.variableDeclaration.initializer) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
+                    }
+                    else {
+                        var identifierName = catchClause.variableDeclaration.name.text;
+                        var locals = catchClause.block.locals;
+                        if (locals && ts.hasProperty(locals, identifierName)) {
+                            var localSymbol = locals[identifierName];
+                            if (localSymbol && (localSymbol.flags & 2 /* BlockScopedVariable */) !== 0) {
+                                grammarErrorOnNode(localSymbol.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, identifierName);
+                            }
+                        }
+                    }
+                }
+                checkBlock(catchClause.block);
+            }
+            if (node.finallyBlock) {
+                checkBlock(node.finallyBlock);
+            }
+        }
+        function checkIndexConstraints(type) {
+            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1 /* Number */);
+            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0 /* String */);
+            var stringIndexType = getIndexTypeOfType(type, 0 /* String */);
+            var numberIndexType = getIndexTypeOfType(type, 1 /* Number */);
+            if (stringIndexType || numberIndexType) {
+                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
+                    var propType = getTypeOfSymbol(prop);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+                });
+                if (type.flags & 1024 /* Class */ && ts.isClassLike(type.symbol.valueDeclaration)) {
+                    var classDeclaration = type.symbol.valueDeclaration;
+                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        // Only process instance properties with computed names here.
+                        // Static properties cannot be in conflict with indexers,
+                        // and properties with literal names were already checked.
+                        if (!(member.flags & 32 /* Static */) && ts.hasDynamicName(member)) {
+                            var propType = getTypeOfSymbol(member.symbol);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+                        }
+                    }
+                }
+            }
+            var errorNode;
+            if (stringIndexType && numberIndexType) {
+                errorNode = declaredNumberIndexer || declaredStringIndexer;
+                // condition 'errorNode === undefined' may appear if types does not declare nor string neither number indexer
+                if (!errorNode && (type.flags & 2048 /* Interface */)) {
+                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0 /* String */) && getIndexTypeOfType(base, 1 /* Number */); });
+                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
+                }
+            }
+            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
+                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
+            }
+            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
+                if (!indexType) {
+                    return;
+                }
+                // index is numeric and property name is not valid numeric literal
+                if (indexKind === 1 /* Number */ && !isNumericName(prop.valueDeclaration.name)) {
+                    return;
+                }
+                // perform property check if property or indexer is declared in 'type'
+                // this allows to rule out cases when both property and indexer are inherited from the base class
+                var errorNode;
+                if (prop.valueDeclaration.name.kind === 140 /* ComputedPropertyName */ || prop.parent === containingType.symbol) {
+                    errorNode = prop.valueDeclaration;
+                }
+                else if (indexDeclaration) {
+                    errorNode = indexDeclaration;
+                }
+                else if (containingType.flags & 2048 /* Interface */) {
+                    // for interfaces property and indexer might be inherited from different bases
+                    // check if any base class already has both property and indexer.
+                    // check should be performed only if 'type' is the first type that brings property\indexer together
+                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
+                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
+                }
+                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
+                    var errorMessage = indexKind === 0 /* String */
+                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
+                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
+                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
+                }
+            }
+        }
+        function checkTypeNameIsReserved(name, message) {
+            // TS 1.0 spec (April 2014): 3.6.1
+            // The predefined type keywords are reserved and cannot be used as names of user defined types.
+            switch (name.text) {
+                case "any":
+                case "number":
+                case "boolean":
+                case "string":
+                case "symbol":
+                case "void":
+                    error(name, message, name.text);
+            }
+        }
+        /** Check each type parameter and check that type parameters have no duplicate type parameter declarations */
+        function checkTypeParameters(typeParameterDeclarations) {
+            if (typeParameterDeclarations) {
+                for (var i = 0, n = typeParameterDeclarations.length; i < n; i++) {
+                    var node = typeParameterDeclarations[i];
+                    checkTypeParameter(node);
+                    if (produceDiagnostics) {
+                        for (var j = 0; j < i; j++) {
+                            if (typeParameterDeclarations[j].symbol === node.symbol) {
+                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        /** Check that type parameter lists are identical across multiple declarations */
+        function checkTypeParameterListsIdentical(node, symbol) {
+            if (symbol.declarations.length === 1) {
+                return;
+            }
+            var firstDecl;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 221 /* ClassDeclaration */ || declaration.kind === 222 /* InterfaceDeclaration */) {
+                    if (!firstDecl) {
+                        firstDecl = declaration;
+                    }
+                    else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) {
+                        error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text);
+                    }
+                }
+            }
+        }
+        function checkClassExpression(node) {
+            checkClassLikeDeclaration(node);
+            checkNodeDeferred(node);
+            return getTypeOfSymbol(getSymbolOfNode(node));
+        }
+        function checkClassExpressionDeferred(node) {
+            ts.forEach(node.members, checkSourceElement);
+        }
+        function checkClassDeclaration(node) {
+            if (!node.name && !(node.flags & 512 /* Default */)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
+            }
+            checkClassLikeDeclaration(node);
+            ts.forEach(node.members, checkSourceElement);
+        }
+        function checkClassLikeDeclaration(node) {
+            checkGrammarClassDeclarationHeritageClauses(node);
+            checkDecorators(node);
+            if (node.name) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+            checkTypeParameters(node.typeParameters);
+            checkExportsOnMergedDeclarations(node);
+            var symbol = getSymbolOfNode(node);
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var typeWithThis = getTypeWithThisArgument(type);
+            var staticType = getTypeOfSymbol(symbol);
+            checkTypeParameterListsIdentical(node, symbol);
+            checkClassForDuplicateDeclarations(node);
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            if (baseTypeNode) {
+                var baseTypes = getBaseTypes(type);
+                if (baseTypes.length && produceDiagnostics) {
+                    var baseType_1 = baseTypes[0];
+                    var staticBaseType = getBaseConstructorTypeOfClass(type);
+                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
+                    checkSourceElement(baseTypeNode.expression);
+                    if (baseTypeNode.typeArguments) {
+                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
+                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments); _i < _a.length; _i++) {
+                            var constructor = _a[_i];
+                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
+                                break;
+                            }
+                        }
+                    }
+                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
+                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
+                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32 /* Class */)) {
+                        // When the static base type is a "class-like" constructor function (but not actually a class), we verify
+                        // that all instantiated base constructor signatures return the same type. We can simply compare the type
+                        // references (as opposed to checking the structure of the types) because elsewhere we have already checked
+                        // that the base type is a class or interface type (and not, for example, an anonymous object type).
+                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
+                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
+                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
+                        }
+                    }
+                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
+                }
+            }
+            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
+            if (implementedTypeNodes) {
+                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
+                    var typeRefNode = implementedTypeNodes_1[_b];
+                    if (!ts.isSupportedExpressionWithTypeArguments(typeRefNode)) {
+                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                    }
+                    checkTypeReferenceNode(typeRefNode);
+                    if (produceDiagnostics) {
+                        var t = getTypeFromTypeNode(typeRefNode);
+                        if (t !== unknownType) {
+                            var declaredType = (t.flags & 4096 /* Reference */) ? t.target : t;
+                            if (declaredType.flags & (1024 /* Class */ | 2048 /* Interface */)) {
+                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
+                            }
+                            else {
+                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
+                            }
+                        }
+                    }
+                }
+            }
+            if (produceDiagnostics) {
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+            }
+        }
+        function checkBaseTypeAccessibility(type, node) {
+            var signatures = getSignaturesOfType(type, 1 /* Construct */);
+            if (signatures.length) {
+                var declaration = signatures[0].declaration;
+                if (declaration && declaration.flags & 8 /* Private */) {
+                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
+                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
+                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, node.expression.text);
+                    }
+                }
+            }
+        }
+        function getTargetSymbol(s) {
+            // if symbol is instantiated its flags are not copied from the 'target'
+            // so we'll need to get back original 'target' symbol to work with correct set of flags
+            return s.flags & 16777216 /* Instantiated */ ? getSymbolLinks(s).target : s;
+        }
+        function getClassLikeDeclarationOfSymbol(symbol) {
+            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
+        }
+        function checkKindsOfPropertyMemberOverrides(type, baseType) {
+            // TypeScript 1.0 spec (April 2014): 8.2.3
+            // A derived class inherits all members from its base class it doesn't override.
+            // Inheritance means that a derived class implicitly contains all non - overridden members of the base class.
+            // Both public and private property members are inherited, but only public property members can be overridden.
+            // A property member in a derived class is said to override a property member in a base class
+            // when the derived class property member has the same name and kind(instance or static)
+            // as the base class property member.
+            // The type of an overriding property member must be assignable(section 3.8.4)
+            // to the type of the overridden property member, or otherwise a compile - time error occurs.
+            // Base class instance member functions can be overridden by derived class instance member functions,
+            // but not by other kinds of members.
+            // Base class instance member variables and accessors can be overridden by
+            // derived class instance member variables and accessors, but not by other kinds of members.
+            // NOTE: assignability is checked in checkClassDeclaration
+            var baseProperties = getPropertiesOfObjectType(baseType);
+            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
+                var baseProperty = baseProperties_1[_i];
+                var base = getTargetSymbol(baseProperty);
+                if (base.flags & 134217728 /* Prototype */) {
+                    continue;
+                }
+                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
+                var baseDeclarationFlags = getDeclarationFlagsFromSymbol(base);
+                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
+                if (derived) {
+                    // In order to resolve whether the inherited method was overridden in the base class or not,
+                    // we compare the Symbols obtained. Since getTargetSymbol returns the symbol on the *uninstantiated*
+                    // type declaration, derived and base resolve to the same symbol even in the case of generic classes.
+                    if (derived === base) {
+                        // derived class inherits base without override/redeclaration
+                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
+                        // It is an error to inherit an abstract member without implementing it or being declared abstract.
+                        // If there is no declaration for the derived class (as in the case of class expressions),
+                        // then the class cannot be declared abstract.
+                        if (baseDeclarationFlags & 128 /* Abstract */ && (!derivedClassDecl || !(derivedClassDecl.flags & 128 /* Abstract */))) {
+                            if (derivedClassDecl.kind === 192 /* ClassExpression */) {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
+                            }
+                            else {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
+                            }
+                        }
+                    }
+                    else {
+                        // derived overrides base.
+                        var derivedDeclarationFlags = getDeclarationFlagsFromSymbol(derived);
+                        if ((baseDeclarationFlags & 8 /* Private */) || (derivedDeclarationFlags & 8 /* Private */)) {
+                            // either base or derived property is private - not override, skip it
+                            continue;
+                        }
+                        if ((baseDeclarationFlags & 32 /* Static */) !== (derivedDeclarationFlags & 32 /* Static */)) {
+                            // value of 'static' is not the same for properties - not override, skip it
+                            continue;
+                        }
+                        if ((base.flags & derived.flags & 8192 /* Method */) || ((base.flags & 98308 /* PropertyOrAccessor */) && (derived.flags & 98308 /* PropertyOrAccessor */))) {
+                            // method is overridden with method or property/accessor is overridden with property/accessor - correct case
+                            continue;
+                        }
+                        var errorMessage = void 0;
+                        if (base.flags & 8192 /* Method */) {
+                            if (derived.flags & 98304 /* Accessor */) {
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
+                            }
+                            else {
+                                ts.Debug.assert((derived.flags & 4 /* Property */) !== 0);
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
+                            }
+                        }
+                        else if (base.flags & 4 /* Property */) {
+                            ts.Debug.assert((derived.flags & 8192 /* Method */) !== 0);
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
+                        }
+                        else {
+                            ts.Debug.assert((base.flags & 98304 /* Accessor */) !== 0);
+                            ts.Debug.assert((derived.flags & 8192 /* Method */) !== 0);
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
+                        }
+                        error(derived.valueDeclaration.name, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                    }
+                }
+            }
+        }
+        function isAccessor(kind) {
+            return kind === 149 /* GetAccessor */ || kind === 150 /* SetAccessor */;
+        }
+        function areTypeParametersIdentical(list1, list2) {
+            if (!list1 && !list2) {
+                return true;
+            }
+            if (!list1 || !list2 || list1.length !== list2.length) {
+                return false;
+            }
+            // TypeScript 1.0 spec (April 2014):
+            // When a generic interface has multiple declarations,  all declarations must have identical type parameter
+            // lists, i.e. identical type parameter names with identical constraints in identical order.
+            for (var i = 0, len = list1.length; i < len; i++) {
+                var tp1 = list1[i];
+                var tp2 = list2[i];
+                if (tp1.name.text !== tp2.name.text) {
+                    return false;
+                }
+                if (!tp1.constraint && !tp2.constraint) {
+                    continue;
+                }
+                if (!tp1.constraint || !tp2.constraint) {
+                    return false;
+                }
+                if (!isTypeIdenticalTo(getTypeFromTypeNode(tp1.constraint), getTypeFromTypeNode(tp2.constraint))) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkInheritedPropertiesAreIdentical(type, typeNode) {
+            var baseTypes = getBaseTypes(type);
+            if (baseTypes.length < 2) {
+                return true;
+            }
+            var seen = {};
+            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen[p.name] = { prop: p, containingType: type }; });
+            var ok = true;
+            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
+                var base = baseTypes_2[_i];
+                var properties = getPropertiesOfObjectType(getTypeWithThisArgument(base, type.thisType));
+                for (var _a = 0, properties_4 = properties; _a < properties_4.length; _a++) {
+                    var prop = properties_4[_a];
+                    if (!ts.hasProperty(seen, prop.name)) {
+                        seen[prop.name] = { prop: prop, containingType: base };
+                    }
+                    else {
+                        var existing = seen[prop.name];
+                        var isInheritedProperty = existing.containingType !== type;
+                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
+                            ok = false;
+                            var typeName1 = typeToString(existing.containingType);
+                            var typeName2 = typeToString(base);
+                            var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
+                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
+                        }
+                    }
+                }
+            }
+            return ok;
+        }
+        function checkInterfaceDeclaration(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
+            checkTypeParameters(node.typeParameters);
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                checkTypeParameterListsIdentical(node, symbol);
+                // Only check this symbol once
+                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */);
+                if (node === firstInterfaceDecl) {
+                    var type = getDeclaredTypeOfSymbol(symbol);
+                    var typeWithThis = getTypeWithThisArgument(type);
+                    // run subsequent checks only if first set succeeded
+                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
+                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
+                            var baseType = _a[_i];
+                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
+                        }
+                        checkIndexConstraints(type);
+                    }
+                }
+                checkObjectTypeForDuplicateDeclarations(node);
+            }
+            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
+                if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
+                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                }
+                checkTypeReferenceNode(heritageElement);
+            });
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                checkTypeForDuplicateIndexSignatures(node);
+            }
+        }
+        function checkTypeAliasDeclaration(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
+            checkSourceElement(node.type);
+        }
+        function computeEnumMemberValues(node) {
+            var nodeLinks = getNodeLinks(node);
+            if (!(nodeLinks.flags & 16384 /* EnumValuesComputed */)) {
+                var enumSymbol = getSymbolOfNode(node);
+                var enumType = getDeclaredTypeOfSymbol(enumSymbol);
+                var autoValue = 0; // set to undefined when enum member is non-constant
+                var ambient = ts.isInAmbientContext(node);
+                var enumIsConst = ts.isConst(node);
+                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                    var member = _a[_i];
+                    if (isComputedNonLiteralName(member.name)) {
+                        error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
+                    }
+                    else {
+                        var text = getTextOfPropertyName(member.name);
+                        if (isNumericLiteralName(text)) {
+                            error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
+                        }
+                    }
+                    var previousEnumMemberIsNonConstant = autoValue === undefined;
+                    var initializer = member.initializer;
+                    if (initializer) {
+                        autoValue = computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient);
+                    }
+                    else if (ambient && !enumIsConst) {
+                        // In ambient enum declarations that specify no const modifier, enum member declarations
+                        // that omit a value are considered computed members (as opposed to having auto-incremented values assigned).
+                        autoValue = undefined;
+                    }
+                    else if (previousEnumMemberIsNonConstant) {
+                        // If the member declaration specifies no value, the member is considered a constant enum member.
+                        // If the member is the first member in the enum declaration, it is assigned the value zero.
+                        // Otherwise, it is assigned the value of the immediately preceding member plus one,
+                        // and an error occurs if the immediately preceding member is not a constant enum member
+                        error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
+                    }
+                    if (autoValue !== undefined) {
+                        getNodeLinks(member).enumMemberValue = autoValue;
+                        autoValue++;
+                    }
+                }
+                nodeLinks.flags |= 16384 /* EnumValuesComputed */;
+            }
+            function computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient) {
+                // Controls if error should be reported after evaluation of constant value is completed
+                // Can be false if another more precise error was already reported during evaluation.
+                var reportError = true;
+                var value = evalConstant(initializer);
+                if (reportError) {
+                    if (value === undefined) {
+                        if (enumIsConst) {
+                            error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
+                        }
+                        else if (ambient) {
+                            error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
+                        }
+                        else {
+                            // Only here do we need to check that the initializer is assignable to the enum type.
+                            checkTypeAssignableTo(checkExpression(initializer), enumType, initializer, /*headMessage*/ undefined);
+                        }
+                    }
+                    else if (enumIsConst) {
+                        if (isNaN(value)) {
+                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN);
+                        }
+                        else if (!isFinite(value)) {
+                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
+                        }
+                    }
+                }
+                return value;
+                function evalConstant(e) {
+                    switch (e.kind) {
+                        case 185 /* PrefixUnaryExpression */:
+                            var value_1 = evalConstant(e.operand);
+                            if (value_1 === undefined) {
+                                return undefined;
+                            }
+                            switch (e.operator) {
+                                case 35 /* PlusToken */: return value_1;
+                                case 36 /* MinusToken */: return -value_1;
+                                case 50 /* TildeToken */: return ~value_1;
+                            }
+                            return undefined;
+                        case 187 /* BinaryExpression */:
+                            var left = evalConstant(e.left);
+                            if (left === undefined) {
+                                return undefined;
+                            }
+                            var right = evalConstant(e.right);
+                            if (right === undefined) {
+                                return undefined;
+                            }
+                            switch (e.operatorToken.kind) {
+                                case 47 /* BarToken */: return left | right;
+                                case 46 /* AmpersandToken */: return left & right;
+                                case 44 /* GreaterThanGreaterThanToken */: return left >> right;
+                                case 45 /* GreaterThanGreaterThanGreaterThanToken */: return left >>> right;
+                                case 43 /* LessThanLessThanToken */: return left << right;
+                                case 48 /* CaretToken */: return left ^ right;
+                                case 37 /* AsteriskToken */: return left * right;
+                                case 39 /* SlashToken */: return left / right;
+                                case 35 /* PlusToken */: return left + right;
+                                case 36 /* MinusToken */: return left - right;
+                                case 40 /* PercentToken */: return left % right;
+                            }
+                            return undefined;
+                        case 8 /* NumericLiteral */:
+                            return +e.text;
+                        case 178 /* ParenthesizedExpression */:
+                            return evalConstant(e.expression);
+                        case 69 /* Identifier */:
+                        case 173 /* ElementAccessExpression */:
+                        case 172 /* PropertyAccessExpression */:
+                            var member = initializer.parent;
+                            var currentType = getTypeOfSymbol(getSymbolOfNode(member.parent));
+                            var enumType_1;
+                            var propertyName = void 0;
+                            if (e.kind === 69 /* Identifier */) {
+                                // unqualified names can refer to member that reside in different declaration of the enum so just doing name resolution won't work.
+                                // instead pick current enum type and later try to fetch member from the type
+                                enumType_1 = currentType;
+                                propertyName = e.text;
+                            }
+                            else {
+                                var expression = void 0;
+                                if (e.kind === 173 /* ElementAccessExpression */) {
+                                    if (e.argumentExpression === undefined ||
+                                        e.argumentExpression.kind !== 9 /* StringLiteral */) {
+                                        return undefined;
+                                    }
+                                    expression = e.expression;
+                                    propertyName = e.argumentExpression.text;
+                                }
+                                else {
+                                    expression = e.expression;
+                                    propertyName = e.name.text;
+                                }
+                                // expression part in ElementAccess\PropertyAccess should be either identifier or dottedName
+                                var current = expression;
+                                while (current) {
+                                    if (current.kind === 69 /* Identifier */) {
+                                        break;
+                                    }
+                                    else if (current.kind === 172 /* PropertyAccessExpression */) {
+                                        current = current.expression;
+                                    }
+                                    else {
+                                        return undefined;
+                                    }
+                                }
+                                enumType_1 = checkExpression(expression);
+                                // allow references to constant members of other enums
+                                if (!(enumType_1.symbol && (enumType_1.symbol.flags & 384 /* Enum */))) {
+                                    return undefined;
+                                }
+                            }
+                            if (propertyName === undefined) {
+                                return undefined;
+                            }
+                            var property = getPropertyOfObjectType(enumType_1, propertyName);
+                            if (!property || !(property.flags & 8 /* EnumMember */)) {
+                                return undefined;
+                            }
+                            var propertyDecl = property.valueDeclaration;
+                            // self references are illegal
+                            if (member === propertyDecl) {
+                                return undefined;
+                            }
+                            // illegal case: forward reference
+                            if (!isBlockScopedNameDeclaredBeforeUse(propertyDecl, member)) {
+                                reportError = false;
+                                error(e, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
+                                return undefined;
+                            }
+                            return getNodeLinks(propertyDecl).enumMemberValue;
+                    }
+                }
+            }
+        }
+        function checkEnumDeclaration(node) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkExportsOnMergedDeclarations(node);
+            computeEnumMemberValues(node);
+            var enumIsConst = ts.isConst(node);
+            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
+                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
+            }
+            // Spec 2014 - Section 9.3:
+            // It isn't possible for one enum declaration to continue the automatic numbering sequence of another,
+            // and when an enum type has multiple declarations, only one declaration is permitted to omit a value
+            // for the first member.
+            //
+            // Only perform this check once per symbol
+            var enumSymbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
+            if (node === firstDeclaration) {
+                if (enumSymbol.declarations.length > 1) {
+                    // check that const is placed\omitted on all enum declarations
+                    ts.forEach(enumSymbol.declarations, function (decl) {
+                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
+                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                        }
+                    });
+                }
+                var seenEnumMissingInitialInitializer_1 = false;
+                ts.forEach(enumSymbol.declarations, function (declaration) {
+                    // return true if we hit a violation of the rule, false otherwise
+                    if (declaration.kind !== 224 /* EnumDeclaration */) {
+                        return false;
+                    }
+                    var enumDeclaration = declaration;
+                    if (!enumDeclaration.members.length) {
+                        return false;
+                    }
+                    var firstEnumMember = enumDeclaration.members[0];
+                    if (!firstEnumMember.initializer) {
+                        if (seenEnumMissingInitialInitializer_1) {
+                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
+                        }
+                        else {
+                            seenEnumMissingInitialInitializer_1 = true;
+                        }
+                    }
+                });
+            }
+        }
+        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
+            var declarations = symbol.declarations;
+            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
+                var declaration = declarations_5[_i];
+                if ((declaration.kind === 221 /* ClassDeclaration */ ||
+                    (declaration.kind === 220 /* FunctionDeclaration */ && ts.nodeIsPresent(declaration.body))) &&
+                    !ts.isInAmbientContext(declaration)) {
+                    return declaration;
+                }
+            }
+            return undefined;
+        }
+        function inSameLexicalScope(node1, node2) {
+            var container1 = ts.getEnclosingBlockScopeContainer(node1);
+            var container2 = ts.getEnclosingBlockScopeContainer(node2);
+            if (isGlobalSourceFile(container1)) {
+                return isGlobalSourceFile(container2);
+            }
+            else if (isGlobalSourceFile(container2)) {
+                return false;
+            }
+            else {
+                return container1 === container2;
+            }
+        }
+        function checkModuleDeclaration(node) {
+            if (produceDiagnostics) {
+                // Grammar checking
+                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
+                var inAmbientContext = ts.isInAmbientContext(node);
+                if (isGlobalAugmentation && !inAmbientContext) {
+                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
+                }
+                var isAmbientExternalModule = ts.isAmbientModule(node);
+                var contextErrorMessage = isAmbientExternalModule
+                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
+                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
+                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
+                    // If we hit a module declaration in an illegal context, just bail out to avoid cascading errors.
+                    return;
+                }
+                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
+                    if (!inAmbientContext && node.name.kind === 9 /* StringLiteral */) {
+                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
+                    }
+                }
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                // The following checks only apply on a non-ambient instantiated module declaration.
+                if (symbol.flags & 512 /* ValueModule */
+                    && symbol.declarations.length > 1
+                    && !inAmbientContext
+                    && ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
+                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
+                    if (firstNonAmbientClassOrFunc) {
+                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
+                        }
+                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
+                        }
+                    }
+                    // if the module merges with a class declaration in the same lexical scope,
+                    // we need to track this to ensure the correct emit.
+                    var mergedClass = ts.getDeclarationOfKind(symbol, 221 /* ClassDeclaration */);
+                    if (mergedClass &&
+                        inSameLexicalScope(node, mergedClass)) {
+                        getNodeLinks(node).flags |= 32768 /* LexicalModuleMergesWithClass */;
+                    }
+                }
+                if (isAmbientExternalModule) {
+                    if (ts.isExternalModuleAugmentation(node)) {
+                        // body of the augmentation should be checked for consistency only if augmentation was applied to its target (either global scope or module)
+                        // otherwise we'll be swamped in cascading errors.
+                        // We can detect if augmentation was applied using following rules:
+                        // - augmentation for a global scope is always applied
+                        // - augmentation for some external module is applied if symbol for augmentation is merged (it was combined with target module).
+                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432 /* Merged */);
+                        if (checkBody) {
+                            // body of ambient external module is always a module block
+                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
+                                var statement = _a[_i];
+                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
+                            }
+                        }
+                    }
+                    else if (isGlobalSourceFile(node.parent)) {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
+                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
+                        }
+                    }
+                    else {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else {
+                            // Node is not an augmentation and is not located on the script level.
+                            // This means that this is declaration of ambient module that is located in other module or namespace which is prohibited.
+                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
+                        }
+                    }
+                }
+            }
+            checkSourceElement(node.body);
+        }
+        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
+            switch (node.kind) {
+                case 200 /* VariableStatement */:
+                    // error each individual name in variable statement instead of marking the entire variable statement
+                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                        var decl = _a[_i];
+                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
+                    }
+                    break;
+                case 235 /* ExportAssignment */:
+                case 236 /* ExportDeclaration */:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
+                    break;
+                case 229 /* ImportEqualsDeclaration */:
+                case 230 /* ImportDeclaration */:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
+                    break;
+                case 169 /* BindingElement */:
+                case 218 /* VariableDeclaration */:
+                    var name_19 = node.name;
+                    if (ts.isBindingPattern(name_19)) {
+                        for (var _b = 0, _c = name_19.elements; _b < _c.length; _b++) {
+                            var el = _c[_b];
+                            // mark individual names in binding pattern
+                            checkModuleAugmentationElement(el, isGlobalAugmentation);
+                        }
+                        break;
+                    }
+                // fallthrough
+                case 221 /* ClassDeclaration */:
+                case 224 /* EnumDeclaration */:
+                case 220 /* FunctionDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 225 /* ModuleDeclaration */:
+                case 223 /* TypeAliasDeclaration */:
+                    if (isGlobalAugmentation) {
+                        return;
+                    }
+                    var symbol = getSymbolOfNode(node);
+                    if (symbol) {
+                        // module augmentations cannot introduce new names on the top level scope of the module
+                        // this is done it two steps
+                        // 1. quick check - if symbol for node is not merged - this is local symbol to this augmentation - report error
+                        // 2. main check - report error if value declaration of the parent symbol is module augmentation)
+                        var reportError = !(symbol.flags & 33554432 /* Merged */);
+                        if (!reportError) {
+                            // symbol should not originate in augmentation
+                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
+                        }
+                    }
+                    break;
+            }
+        }
+        function getFirstIdentifier(node) {
+            while (true) {
+                if (node.kind === 139 /* QualifiedName */) {
+                    node = node.left;
+                }
+                else if (node.kind === 172 /* PropertyAccessExpression */) {
+                    node = node.expression;
+                }
+                else {
+                    break;
+                }
+            }
+            ts.Debug.assert(node.kind === 69 /* Identifier */);
+            return node;
+        }
+        function checkExternalImportOrExportDeclaration(node) {
+            var moduleName = ts.getExternalModuleName(node);
+            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9 /* StringLiteral */) {
+                error(moduleName, ts.Diagnostics.String_literal_expected);
+                return false;
+            }
+            var inAmbientExternalModule = node.parent.kind === 226 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
+            if (node.parent.kind !== 256 /* SourceFile */ && !inAmbientExternalModule) {
+                error(moduleName, node.kind === 236 /* ExportDeclaration */ ?
+                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
+                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
+                return false;
+            }
+            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
+                // we have already reported errors on top level imports\exports in external module augmentations in checkModuleDeclaration
+                // no need to do this again.
+                if (!isTopLevelInExternalModuleAugmentation(node)) {
+                    // TypeScript 1.0 spec (April 2013): 12.1.6
+                    // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference
+                    // other external modules only through top - level external module names.
+                    // Relative external module names are not permitted.
+                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkAliasSymbol(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target !== unknownSymbol) {
+                // For external modules symbol represent local symbol for an alias.
+                // This local symbol will merge any other local declarations (excluding other aliases)
+                // and symbol.flags will contains combined representation for all merged declaration.
+                // Based on symbol.flags we can compute a set of excluded meanings (meaning that resolved alias should not have,
+                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export*
+                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names).
+                var excludedMeanings = (symbol.flags & (107455 /* Value */ | 1048576 /* ExportValue */) ? 107455 /* Value */ : 0) |
+                    (symbol.flags & 793056 /* Type */ ? 793056 /* Type */ : 0) |
+                    (symbol.flags & 1536 /* Namespace */ ? 1536 /* Namespace */ : 0);
+                if (target.flags & excludedMeanings) {
+                    var message = node.kind === 238 /* ExportSpecifier */ ?
+                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
+                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
+                    error(node, message, symbolToString(symbol));
+                }
+            }
+        }
+        function checkImportBinding(node) {
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkAliasSymbol(node);
+        }
+        function checkImportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023 /* Modifier */)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
+            }
+            if (checkExternalImportOrExportDeclaration(node)) {
+                var importClause = node.importClause;
+                if (importClause) {
+                    if (importClause.name) {
+                        checkImportBinding(importClause);
+                    }
+                    if (importClause.namedBindings) {
+                        if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                            checkImportBinding(importClause.namedBindings);
+                        }
+                        else {
+                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
+                        }
+                    }
+                }
+            }
+        }
+        function checkImportEqualsDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
+                checkImportBinding(node);
+                if (node.flags & 1 /* Export */) {
+                    markExportAsReferenced(node);
+                }
+                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    var target = resolveAlias(getSymbolOfNode(node));
+                    if (target !== unknownSymbol) {
+                        if (target.flags & 107455 /* Value */) {
+                            // Target is a value symbol, check that it is not hidden by a local declaration with the same name
+                            var moduleName = getFirstIdentifier(node.moduleReference);
+                            if (!(resolveEntityName(moduleName, 107455 /* Value */ | 1536 /* Namespace */).flags & 1536 /* Namespace */)) {
+                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
+                            }
+                        }
+                        if (target.flags & 793056 /* Type */) {
+                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
+                        }
+                    }
+                }
+                else {
+                    if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
+                        // Import equals declaration is deprecated in es6 or above
+                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
+                    }
+                }
+            }
+        }
+        function checkExportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
+                // If we hit an export in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023 /* Modifier */)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
+            }
+            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
+                if (node.exportClause) {
+                    // export { x, y }
+                    // export { x, y } from "foo"
+                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
+                    var inAmbientExternalModule = node.parent.kind === 226 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
+                    if (node.parent.kind !== 256 /* SourceFile */ && !inAmbientExternalModule) {
+                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
+                    }
+                }
+                else {
+                    // export * from "foo"
+                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
+                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
+                    }
+                }
+            }
+        }
+        function checkGrammarModuleElementContext(node, errorMessage) {
+            if (node.parent.kind !== 256 /* SourceFile */ && node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 225 /* ModuleDeclaration */) {
+                return grammarErrorOnFirstToken(node, errorMessage);
+            }
+        }
+        function checkExportSpecifier(node) {
+            checkAliasSymbol(node);
+            if (!node.parent.parent.moduleSpecifier) {
+                var exportedName = node.propertyName || node.name;
+                // find immediate value referenced by exported name (SymbolFlags.Alias is set so we don't chase down aliases)
+                var symbol = resolveName(exportedName, exportedName.text, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */, 
+                /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
+                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
+                }
+                else {
+                    markExportAsReferenced(node);
+                }
+            }
+        }
+        function checkExportAssignment(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
+                // If we hit an export assignment in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            var container = node.parent.kind === 256 /* SourceFile */ ? node.parent : node.parent.parent;
+            if (container.kind === 225 /* ModuleDeclaration */ && !ts.isAmbientModule(container)) {
+                error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
+                return;
+            }
+            // Grammar checking
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023 /* Modifier */)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
+            }
+            if (node.expression.kind === 69 /* Identifier */) {
+                markExportAsReferenced(node);
+            }
+            else {
+                checkExpressionCached(node.expression);
+            }
+            checkExternalModuleExports(container);
+            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
+                if (modulekind === ts.ModuleKind.ES6) {
+                    // export assignment is not supported in es6 modules
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
+                }
+                else if (modulekind === ts.ModuleKind.System) {
+                    // system modules does not support export assignment
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
+                }
+            }
+        }
+        function hasExportedMembers(moduleSymbol) {
+            for (var id in moduleSymbol.exports) {
+                if (id !== "export=") {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkExternalModuleExports(node) {
+            var moduleSymbol = getSymbolOfNode(node);
+            var links = getSymbolLinks(moduleSymbol);
+            if (!links.exportsChecked) {
+                var exportEqualsSymbol = moduleSymbol.exports["export="];
+                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
+                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
+                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
+                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
+                    }
+                }
+                // Checks for export * conflicts
+                var exports = getExportsOfModule(moduleSymbol);
+                for (var id in exports) {
+                    if (id === "__export") {
+                        continue;
+                    }
+                    var _a = exports[id], declarations = _a.declarations, flags = _a.flags;
+                    // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries.
+                    // (TS Exceptions: namespaces, function overloads, enums, and interfaces)
+                    if (flags & (1536 /* Namespace */ | 64 /* Interface */ | 384 /* Enum */)) {
+                        continue;
+                    }
+                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
+                    if (flags & 524288 /* TypeAlias */ && exportedDeclarationsCount <= 2) {
+                        // it is legal to merge type alias with other values
+                        // so count should be either 1 (just type alias) or 2 (type alias + merged value)
+                        continue;
+                    }
+                    if (exportedDeclarationsCount > 1) {
+                        for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
+                            var declaration = declarations_6[_i];
+                            if (isNotOverload(declaration)) {
+                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
+                            }
+                        }
+                    }
+                }
+                links.exportsChecked = true;
+            }
+            function isNotOverload(declaration) {
+                return declaration.kind !== 220 /* FunctionDeclaration */ || !!declaration.body;
+            }
+        }
+        function checkSourceElement(node) {
+            if (!node) {
+                return;
+            }
+            var kind = node.kind;
+            if (cancellationToken) {
+                // Only bother checking on a few construct kinds.  We don't want to be excessively
+                // hitting the cancellation token on every node we check.
+                switch (kind) {
+                    case 225 /* ModuleDeclaration */:
+                    case 221 /* ClassDeclaration */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 220 /* FunctionDeclaration */:
+                        cancellationToken.throwIfCancellationRequested();
+                }
+            }
+            switch (kind) {
+                case 141 /* TypeParameter */:
+                    return checkTypeParameter(node);
+                case 142 /* Parameter */:
+                    return checkParameter(node);
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                    return checkPropertyDeclaration(node);
+                case 156 /* FunctionType */:
+                case 157 /* ConstructorType */:
+                case 151 /* CallSignature */:
+                case 152 /* ConstructSignature */:
+                    return checkSignatureDeclaration(node);
+                case 153 /* IndexSignature */:
+                    return checkSignatureDeclaration(node);
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                    return checkMethodDeclaration(node);
+                case 148 /* Constructor */:
+                    return checkConstructorDeclaration(node);
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                    return checkAccessorDeclaration(node);
+                case 155 /* TypeReference */:
+                    return checkTypeReferenceNode(node);
+                case 154 /* TypePredicate */:
+                    return checkTypePredicate(node);
+                case 158 /* TypeQuery */:
+                    return checkTypeQuery(node);
+                case 159 /* TypeLiteral */:
+                    return checkTypeLiteral(node);
+                case 160 /* ArrayType */:
+                    return checkArrayType(node);
+                case 161 /* TupleType */:
+                    return checkTupleType(node);
+                case 162 /* UnionType */:
+                case 163 /* IntersectionType */:
+                    return checkUnionOrIntersectionType(node);
+                case 164 /* ParenthesizedType */:
+                    return checkSourceElement(node.type);
+                case 220 /* FunctionDeclaration */:
+                    return checkFunctionDeclaration(node);
+                case 199 /* Block */:
+                case 226 /* ModuleBlock */:
+                    return checkBlock(node);
+                case 200 /* VariableStatement */:
+                    return checkVariableStatement(node);
+                case 202 /* ExpressionStatement */:
+                    return checkExpressionStatement(node);
+                case 203 /* IfStatement */:
+                    return checkIfStatement(node);
+                case 204 /* DoStatement */:
+                    return checkDoStatement(node);
+                case 205 /* WhileStatement */:
+                    return checkWhileStatement(node);
+                case 206 /* ForStatement */:
+                    return checkForStatement(node);
+                case 207 /* ForInStatement */:
+                    return checkForInStatement(node);
+                case 208 /* ForOfStatement */:
+                    return checkForOfStatement(node);
+                case 209 /* ContinueStatement */:
+                case 210 /* BreakStatement */:
+                    return checkBreakOrContinueStatement(node);
+                case 211 /* ReturnStatement */:
+                    return checkReturnStatement(node);
+                case 212 /* WithStatement */:
+                    return checkWithStatement(node);
+                case 213 /* SwitchStatement */:
+                    return checkSwitchStatement(node);
+                case 214 /* LabeledStatement */:
+                    return checkLabeledStatement(node);
+                case 215 /* ThrowStatement */:
+                    return checkThrowStatement(node);
+                case 216 /* TryStatement */:
+                    return checkTryStatement(node);
+                case 218 /* VariableDeclaration */:
+                    return checkVariableDeclaration(node);
+                case 169 /* BindingElement */:
+                    return checkBindingElement(node);
+                case 221 /* ClassDeclaration */:
+                    return checkClassDeclaration(node);
+                case 222 /* InterfaceDeclaration */:
+                    return checkInterfaceDeclaration(node);
+                case 223 /* TypeAliasDeclaration */:
+                    return checkTypeAliasDeclaration(node);
+                case 224 /* EnumDeclaration */:
+                    return checkEnumDeclaration(node);
+                case 225 /* ModuleDeclaration */:
+                    return checkModuleDeclaration(node);
+                case 230 /* ImportDeclaration */:
+                    return checkImportDeclaration(node);
+                case 229 /* ImportEqualsDeclaration */:
+                    return checkImportEqualsDeclaration(node);
+                case 236 /* ExportDeclaration */:
+                    return checkExportDeclaration(node);
+                case 235 /* ExportAssignment */:
+                    return checkExportAssignment(node);
+                case 201 /* EmptyStatement */:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 217 /* DebuggerStatement */:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 239 /* MissingDeclaration */:
+                    return checkMissingDeclaration(node);
+            }
+        }
+        // Function and class expression bodies are checked after all statements in the enclosing body. This is
+        // to ensure constructs like the following are permitted:
+        //     const foo = function () {
+        //        const s = foo();
+        //        return "hello";
+        //     }
+        // Here, performing a full type check of the body of the function expression whilst in the process of
+        // determining the type of foo would cause foo to be given type any because of the recursive reference.
+        // Delaying the type check of the body ensures foo has been assigned a type.
+        function checkNodeDeferred(node) {
+            if (deferredNodes) {
+                deferredNodes.push(node);
+            }
+        }
+        function checkDeferredNodes() {
+            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
+                var node = deferredNodes_1[_i];
+                switch (node.kind) {
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
+                        break;
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        checkAccessorDeferred(node);
+                        break;
+                    case 192 /* ClassExpression */:
+                        checkClassExpressionDeferred(node);
+                        break;
+                }
+            }
+        }
+        function checkSourceFile(node) {
+            var start = new Date().getTime();
+            checkSourceFileWorker(node);
+            ts.checkTime += new Date().getTime() - start;
+        }
+        // Fully type check a source file and collect the relevant diagnostics.
+        function checkSourceFileWorker(node) {
+            var links = getNodeLinks(node);
+            if (!(links.flags & 1 /* TypeChecked */)) {
+                // If skipLibCheck is enabled, skip type checking if file is a declaration file.
+                // If skipDefaultLibCheck is enabled, skip type checking if file contains a
+                // '/// <reference no-default-lib="true"/>' directive.
+                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
+                    return;
+                }
+                // Grammar checking
+                checkGrammarSourceFile(node);
+                potentialThisCollisions.length = 0;
+                deferredNodes = [];
+                ts.forEach(node.statements, checkSourceElement);
+                checkDeferredNodes();
+                deferredNodes = undefined;
+                if (ts.isExternalOrCommonJsModule(node)) {
+                    checkExternalModuleExports(node);
+                }
+                if (potentialThisCollisions.length) {
+                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
+                    potentialThisCollisions.length = 0;
+                }
+                links.flags |= 1 /* TypeChecked */;
+            }
+        }
+        function getDiagnostics(sourceFile, ct) {
+            try {
+                // Record the cancellation token so it can be checked later on during checkSourceElement.
+                // Do this in a finally block so we can ensure that it gets reset back to nothing after
+                // this call is done.
+                cancellationToken = ct;
+                return getDiagnosticsWorker(sourceFile);
+            }
+            finally {
+                cancellationToken = undefined;
+            }
+        }
+        function getDiagnosticsWorker(sourceFile) {
+            throwIfNonDiagnosticsProducing();
+            if (sourceFile) {
+                checkSourceFile(sourceFile);
+                return diagnostics.getDiagnostics(sourceFile.fileName);
+            }
+            ts.forEach(host.getSourceFiles(), checkSourceFile);
+            return diagnostics.getDiagnostics();
+        }
+        function getGlobalDiagnostics() {
+            throwIfNonDiagnosticsProducing();
+            return diagnostics.getGlobalDiagnostics();
+        }
+        function throwIfNonDiagnosticsProducing() {
+            if (!produceDiagnostics) {
+                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
+            }
+        }
+        // Language service support
+        function isInsideWithStatementBody(node) {
+            if (node) {
+                while (node.parent) {
+                    if (node.parent.kind === 212 /* WithStatement */ && node.parent.statement === node) {
+                        return true;
+                    }
+                    node = node.parent;
+                }
+            }
+            return false;
+        }
+        function getSymbolsInScope(location, meaning) {
+            var symbols = {};
+            var memberFlags = 0;
+            if (isInsideWithStatementBody(location)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return [];
+            }
+            populateSymbols();
+            return symbolsToArray(symbols);
+            function populateSymbols() {
+                while (location) {
+                    if (location.locals && !isGlobalSourceFile(location)) {
+                        copySymbols(location.locals, meaning);
+                    }
+                    switch (location.kind) {
+                        case 256 /* SourceFile */:
+                            if (!ts.isExternalOrCommonJsModule(location)) {
+                                break;
+                            }
+                        case 225 /* ModuleDeclaration */:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931 /* ModuleMember */);
+                            break;
+                        case 224 /* EnumDeclaration */:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8 /* EnumMember */);
+                            break;
+                        case 192 /* ClassExpression */:
+                            var className = location.name;
+                            if (className) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                        // fall through; this fall-through is necessary because we would like to handle
+                        // type parameter inside class expression similar to how we handle it in classDeclaration and interface Declaration
+                        case 221 /* ClassDeclaration */:
+                        case 222 /* InterfaceDeclaration */:
+                            // If we didn't come from static member of class or interface,
+                            // add the type parameters into the symbol table
+                            // (type parameters of classDeclaration/classExpression and interface are in member property of the symbol.
+                            // Note: that the memberFlags come from previous iteration.
+                            if (!(memberFlags & 32 /* Static */)) {
+                                copySymbols(getSymbolOfNode(location).members, meaning & 793056 /* Type */);
+                            }
+                            break;
+                        case 179 /* FunctionExpression */:
+                            var funcName = location.name;
+                            if (funcName) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                            break;
+                    }
+                    if (ts.introducesArgumentsExoticObject(location)) {
+                        copySymbol(argumentsSymbol, meaning);
+                    }
+                    memberFlags = location.flags;
+                    location = location.parent;
+                }
+                copySymbols(globals, meaning);
+            }
+            /**
+             * Copy the given symbol into symbol tables if the symbol has the given meaning
+             * and it doesn't already existed in the symbol table
+             * @param key a key for storing in symbol table; if undefined, use symbol.name
+             * @param symbol the symbol to be added into symbol table
+             * @param meaning meaning of symbol to filter by before adding to symbol table
+             */
+            function copySymbol(symbol, meaning) {
+                if (symbol.flags & meaning) {
+                    var id = symbol.name;
+                    // We will copy all symbol regardless of its reserved name because
+                    // symbolsToArray will check whether the key is a reserved name and
+                    // it will not copy symbol with reserved name to the array
+                    if (!ts.hasProperty(symbols, id)) {
+                        symbols[id] = symbol;
+                    }
+                }
+            }
+            function copySymbols(source, meaning) {
+                if (meaning) {
+                    for (var id in source) {
+                        var symbol = source[id];
+                        copySymbol(symbol, meaning);
+                    }
+                }
+            }
+        }
+        function isTypeDeclarationName(name) {
+            return name.kind === 69 /* Identifier */ &&
+                isTypeDeclaration(name.parent) &&
+                name.parent.name === name;
+        }
+        function isTypeDeclaration(node) {
+            switch (node.kind) {
+                case 141 /* TypeParameter */:
+                case 221 /* ClassDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 223 /* TypeAliasDeclaration */:
+                case 224 /* EnumDeclaration */:
+                    return true;
+            }
+        }
+        // True if the given identifier is part of a type reference
+        function isTypeReferenceIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 139 /* QualifiedName */) {
+                node = node.parent;
+            }
+            return node.parent && (node.parent.kind === 155 /* TypeReference */ || node.parent.kind === 267 /* JSDocTypeReference */);
+        }
+        function isHeritageClauseElementIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 172 /* PropertyAccessExpression */) {
+                node = node.parent;
+            }
+            return node.parent && node.parent.kind === 194 /* ExpressionWithTypeArguments */;
+        }
+        function forEachEnclosingClass(node, callback) {
+            var result;
+            while (true) {
+                node = ts.getContainingClass(node);
+                if (!node)
+                    break;
+                if (result = callback(node))
+                    break;
+            }
+            return result;
+        }
+        function isNodeWithinClass(node, classDeclaration) {
+            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
+        }
+        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
+            while (nodeOnRightSide.parent.kind === 139 /* QualifiedName */) {
+                nodeOnRightSide = nodeOnRightSide.parent;
+            }
+            if (nodeOnRightSide.parent.kind === 229 /* ImportEqualsDeclaration */) {
+                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            if (nodeOnRightSide.parent.kind === 235 /* ExportAssignment */) {
+                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            return undefined;
+        }
+        function isInRightSideOfImportOrExportAssignment(node) {
+            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
+        }
+        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
+            if (ts.isDeclarationName(entityName)) {
+                return getSymbolOfNode(entityName.parent);
+            }
+            if (ts.isInJavaScriptFile(entityName) && entityName.parent.kind === 172 /* PropertyAccessExpression */) {
+                var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
+                switch (specialPropertyAssignmentKind) {
+                    case 1 /* ExportsProperty */:
+                    case 3 /* PrototypeProperty */:
+                        return getSymbolOfNode(entityName.parent);
+                    case 4 /* ThisProperty */:
+                    case 2 /* ModuleExports */:
+                        return getSymbolOfNode(entityName.parent.parent);
+                    default:
+                }
+            }
+            if (entityName.parent.kind === 235 /* ExportAssignment */) {
+                return resolveEntityName(entityName, 
+                /*all meanings*/ 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */);
+            }
+            if (entityName.kind !== 172 /* PropertyAccessExpression */) {
+                if (isInRightSideOfImportOrExportAssignment(entityName)) {
+                    // Since we already checked for ExportAssignment, this really could only be an Import
+                    var importEqualsDeclaration = ts.getAncestor(entityName, 229 /* ImportEqualsDeclaration */);
+                    ts.Debug.assert(importEqualsDeclaration !== undefined);
+                    return getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importEqualsDeclaration, /*dontResolveAlias*/ true);
+                }
+            }
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            if (isHeritageClauseElementIdentifier(entityName)) {
+                var meaning = 0 /* None */;
+                // In an interface or class, we're definitely interested in a type.
+                if (entityName.parent.kind === 194 /* ExpressionWithTypeArguments */) {
+                    meaning = 793056 /* Type */;
+                    // In a class 'extends' clause we are also looking for a value.
+                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                        meaning |= 107455 /* Value */;
+                    }
+                }
+                else {
+                    meaning = 1536 /* Namespace */;
+                }
+                meaning |= 8388608 /* Alias */;
+                return resolveEntityName(entityName, meaning);
+            }
+            else if (ts.isExpression(entityName)) {
+                if (ts.nodeIsMissing(entityName)) {
+                    // Missing entity name.
+                    return undefined;
+                }
+                if (entityName.kind === 69 /* Identifier */) {
+                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
+                        return getIntrinsicTagSymbol(entityName.parent);
+                    }
+                    return resolveEntityName(entityName, 107455 /* Value */, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
+                }
+                else if (entityName.kind === 172 /* PropertyAccessExpression */) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkPropertyAccessExpression(entityName);
+                    }
+                    return getNodeLinks(entityName).resolvedSymbol;
+                }
+                else if (entityName.kind === 139 /* QualifiedName */) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkQualifiedName(entityName);
+                    }
+                    return getNodeLinks(entityName).resolvedSymbol;
+                }
+            }
+            else if (isTypeReferenceIdentifier(entityName)) {
+                var meaning = (entityName.parent.kind === 155 /* TypeReference */ || entityName.parent.kind === 267 /* JSDocTypeReference */) ? 793056 /* Type */ : 1536 /* Namespace */;
+                return resolveEntityName(entityName, meaning, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
+            }
+            else if (entityName.parent.kind === 246 /* JsxAttribute */) {
+                return getJsxAttributePropertySymbol(entityName.parent);
+            }
+            if (entityName.parent.kind === 154 /* TypePredicate */) {
+                return resolveEntityName(entityName, /*meaning*/ 1 /* FunctionScopedVariable */);
+            }
+            // Do we want to return undefined here?
+            return undefined;
+        }
+        function getSymbolAtLocation(node) {
+            if (node.kind === 256 /* SourceFile */) {
+                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
+            }
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
+            }
+            if (ts.isDeclarationName(node)) {
+                // This is a declaration, call getSymbolOfNode
+                return getSymbolOfNode(node.parent);
+            }
+            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
+                return getSymbolOfNode(node.parent.parent);
+            }
+            if (node.kind === 69 /* Identifier */) {
+                if (isInRightSideOfImportOrExportAssignment(node)) {
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                }
+                else if (node.parent.kind === 169 /* BindingElement */ &&
+                    node.parent.parent.kind === 167 /* ObjectBindingPattern */ &&
+                    node === node.parent.propertyName) {
+                    var typeOfPattern = getTypeOfNode(node.parent.parent);
+                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
+                    if (propertyDeclaration) {
+                        return propertyDeclaration;
+                    }
+                }
+            }
+            switch (node.kind) {
+                case 69 /* Identifier */:
+                case 172 /* PropertyAccessExpression */:
+                case 139 /* QualifiedName */:
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                case 97 /* ThisKeyword */:
+                case 95 /* SuperKeyword */:
+                    var type = ts.isExpression(node) ? checkExpression(node) : getTypeFromTypeNode(node);
+                    return type.symbol;
+                case 165 /* ThisType */:
+                    return getTypeFromTypeNode(node).symbol;
+                case 121 /* ConstructorKeyword */:
+                    // constructor keyword for an overload, should take us to the definition if it exist
+                    var constructorDeclaration = node.parent;
+                    if (constructorDeclaration && constructorDeclaration.kind === 148 /* Constructor */) {
+                        return constructorDeclaration.parent.symbol;
+                    }
+                    return undefined;
+                case 9 /* StringLiteral */:
+                    // External module name in an import declaration
+                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
+                        ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
+                        ((node.parent.kind === 230 /* ImportDeclaration */ || node.parent.kind === 236 /* ExportDeclaration */) &&
+                            node.parent.moduleSpecifier === node)) {
+                        return resolveExternalModuleName(node, node);
+                    }
+                // Fall through
+                case 8 /* NumericLiteral */:
+                    // index access
+                    if (node.parent.kind === 173 /* ElementAccessExpression */ && node.parent.argumentExpression === node) {
+                        var objectType = checkExpression(node.parent.expression);
+                        if (objectType === unknownType)
+                            return undefined;
+                        var apparentType = getApparentType(objectType);
+                        if (apparentType === unknownType)
+                            return undefined;
+                        return getPropertyOfType(apparentType, node.text);
+                    }
+                    break;
+            }
+            return undefined;
+        }
+        function getShorthandAssignmentValueSymbol(location) {
+            // The function returns a value symbol of an identifier in the short-hand property assignment.
+            // This is necessary as an identifier in short-hand property assignment can contains two meaning:
+            // property name and property value.
+            if (location && location.kind === 254 /* ShorthandPropertyAssignment */) {
+                return resolveEntityName(location.name, 107455 /* Value */ | 8388608 /* Alias */);
+            }
+            return undefined;
+        }
+        /** Returns the target of an export specifier without following aliases */
+        function getExportSpecifierLocalTargetSymbol(node) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node) :
+                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */);
+        }
+        function getTypeOfNode(node) {
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return unknownType;
+            }
+            if (ts.isTypeNode(node)) {
+                return getTypeFromTypeNode(node);
+            }
+            if (ts.isExpression(node)) {
+                return getTypeOfExpression(node);
+            }
+            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
+                // A SyntaxKind.ExpressionWithTypeArguments is considered a type node, except when it occurs in the
+                // extends clause of a class. We handle that case here.
+                return getBaseTypes(getDeclaredTypeOfSymbol(getSymbolOfNode(node.parent.parent)))[0];
+            }
+            if (isTypeDeclaration(node)) {
+                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
+                var symbol = getSymbolOfNode(node);
+                return getDeclaredTypeOfSymbol(symbol);
+            }
+            if (isTypeDeclarationName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getDeclaredTypeOfSymbol(symbol);
+            }
+            if (ts.isDeclaration(node)) {
+                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
+                var symbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(symbol);
+            }
+            if (ts.isDeclarationName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getTypeOfSymbol(symbol);
+            }
+            if (ts.isBindingPattern(node)) {
+                return getTypeForVariableLikeDeclaration(node.parent, /*includeOptionality*/ true);
+            }
+            if (isInRightSideOfImportOrExportAssignment(node)) {
+                var symbol = getSymbolAtLocation(node);
+                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
+                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
+            }
+            return unknownType;
+        }
+        // Gets the type of object literal or array literal of destructuring assignment.
+        // { a } from
+        //     for ( { a } of elems) {
+        //     }
+        // [ a ] from
+        //     [a] = [ some array ...]
+        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
+            ts.Debug.assert(expr.kind === 171 /* ObjectLiteralExpression */ || expr.kind === 170 /* ArrayLiteralExpression */);
+            // If this is from "for of"
+            //     for ( { a } of elems) {
+            //     }
+            if (expr.parent.kind === 208 /* ForOfStatement */) {
+                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
+            }
+            // If this is from "for" initializer
+            //     for ({a } = elems[0];.....) { }
+            if (expr.parent.kind === 187 /* BinaryExpression */) {
+                var iteratedType = checkExpression(expr.parent.right);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
+            }
+            // If this is from nested object binding pattern
+            //     for ({ skills: { primary, secondary } } = multiRobot, i = 0; i < 1; i++) {
+            if (expr.parent.kind === 253 /* PropertyAssignment */) {
+                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
+                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
+            }
+            // Array literal assignment - array destructuring pattern
+            ts.Debug.assert(expr.parent.kind === 170 /* ArrayLiteralExpression */);
+            //    [{ property1: p1, property2 }] = elems;
+            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
+            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, /*allowStringInput*/ false) || unknownType;
+            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
+        }
+        // Gets the property symbol corresponding to the property in destructuring assignment
+        // 'property1' from
+        //     for ( { property1: a } of elems) {
+        //     }
+        // 'property1' at location 'a' from:
+        //     [a] = [ property1, property2 ]
+        function getPropertySymbolOfDestructuringAssignment(location) {
+            // Get the type of the object or array literal and then look for property of given name in the type
+            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
+            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
+        }
+        function getTypeOfExpression(expr) {
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
+                expr = expr.parent;
+            }
+            return checkExpression(expr);
+        }
+        /**
+          * Gets either the static or instance type of a class element, based on
+          * whether the element is declared as "static".
+          */
+        function getParentTypeOfClassElement(node) {
+            var classSymbol = getSymbolOfNode(node.parent);
+            return node.flags & 32 /* Static */
+                ? getTypeOfSymbol(classSymbol)
+                : getDeclaredTypeOfSymbol(classSymbol);
+        }
+        // Return the list of properties of the given type, augmented with properties from Function
+        // if the type has call or construct signatures
+        function getAugmentedPropertiesOfType(type) {
+            type = getApparentType(type);
+            var propsByName = createSymbolTable(getPropertiesOfType(type));
+            if (getSignaturesOfType(type, 0 /* Call */).length || getSignaturesOfType(type, 1 /* Construct */).length) {
+                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
+                    if (!ts.hasProperty(propsByName, p.name)) {
+                        propsByName[p.name] = p;
+                    }
+                });
+            }
+            return getNamedMembers(propsByName);
+        }
+        function getRootSymbols(symbol) {
+            if (symbol.flags & 268435456 /* SyntheticProperty */) {
+                var symbols_3 = [];
+                var name_20 = symbol.name;
+                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
+                    var symbol = getPropertyOfType(t, name_20);
+                    if (symbol) {
+                        symbols_3.push(symbol);
+                    }
+                });
+                return symbols_3;
+            }
+            else if (symbol.flags & 67108864 /* Transient */) {
+                var target = void 0;
+                var next = symbol;
+                while (next = getSymbolLinks(next).target) {
+                    target = next;
+                }
+                if (target) {
+                    return [target];
+                }
+            }
+            return [symbol];
+        }
+        // Emitter support
+        function isArgumentsLocalBinding(node) {
+            return getReferencedValueSymbol(node) === argumentsSymbol;
+        }
+        function moduleExportsSomeValue(moduleReferenceExpression) {
+            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
+            if (!moduleSymbol) {
+                // module not found - be conservative
+                return true;
+            }
+            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
+            // if module has export assignment then 'resolveExternalModuleSymbol' will return resolved symbol for export assignment
+            // otherwise it will return moduleSymbol itself
+            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
+            var symbolLinks = getSymbolLinks(moduleSymbol);
+            if (symbolLinks.exportsSomeValue === undefined) {
+                // for export assignments - check if resolved symbol for RHS is itself a value
+                // otherwise - check if at least one export is value
+                symbolLinks.exportsSomeValue = hasExportAssignment
+                    ? !!(moduleSymbol.flags & 107455 /* Value */)
+                    : ts.forEachValue(getExportsOfModule(moduleSymbol), isValue);
+            }
+            return symbolLinks.exportsSomeValue;
+            function isValue(s) {
+                s = resolveSymbol(s);
+                return s && !!(s.flags & 107455 /* Value */);
+            }
+        }
+        // When resolved as an expression identifier, if the given node references an exported entity, return the declaration
+        // node of the exported entity's container. Otherwise, return undefined.
+        function getReferencedExportContainer(node) {
+            var symbol = getReferencedValueSymbol(node);
+            if (symbol) {
+                if (symbol.flags & 1048576 /* ExportValue */) {
+                    // If we reference an exported entity within the same module declaration, then whether
+                    // we prefix depends on the kind of entity. SymbolFlags.ExportHasLocal encompasses all the
+                    // kinds that we do NOT prefix.
+                    var exportSymbol = getMergedSymbol(symbol.exportSymbol);
+                    if (exportSymbol.flags & 944 /* ExportHasLocal */) {
+                        return undefined;
+                    }
+                    symbol = exportSymbol;
+                }
+                var parentSymbol = getParentOfSymbol(symbol);
+                if (parentSymbol) {
+                    if (parentSymbol.flags & 512 /* ValueModule */ && parentSymbol.valueDeclaration.kind === 256 /* SourceFile */) {
+                        return parentSymbol.valueDeclaration;
+                    }
+                    for (var n = node.parent; n; n = n.parent) {
+                        if ((n.kind === 225 /* ModuleDeclaration */ || n.kind === 224 /* EnumDeclaration */) && getSymbolOfNode(n) === parentSymbol) {
+                            return n;
+                        }
+                    }
+                }
+            }
+        }
+        // When resolved as an expression identifier, if the given node references an import, return the declaration of
+        // that import. Otherwise, return undefined.
+        function getReferencedImportDeclaration(node) {
+            var symbol = getReferencedValueSymbol(node);
+            return symbol && symbol.flags & 8388608 /* Alias */ ? getDeclarationOfAliasSymbol(symbol) : undefined;
+        }
+        function isSymbolOfDeclarationWithCollidingName(symbol) {
+            if (symbol.flags & 418 /* BlockScoped */) {
+                var links = getSymbolLinks(symbol);
+                if (links.isDeclarationWithCollidingName === undefined) {
+                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (ts.isStatementWithLocals(container)) {
+                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
+                        if (!!resolveName(container.parent, symbol.name, 107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined)) {
+                            // redeclaration - always should be renamed
+                            links.isDeclarationWithCollidingName = true;
+                        }
+                        else if (nodeLinks_1.flags & 131072 /* CapturedBlockScopedBinding */) {
+                            // binding is captured in the function
+                            // should be renamed if:
+                            // - binding is not top level - top level bindings never collide with anything
+                            // AND
+                            //   - binding is not declared in loop, should be renamed to avoid name reuse across siblings
+                            //     let a, b
+                            //     { let x = 1; a = () => x;  }
+                            //     { let x = 100; b = () => x; }
+                            //     console.log(a()); // should print '1'
+                            //     console.log(b()); // should print '100'
+                            //     OR
+                            //   - binding is declared inside loop but not in inside initializer of iteration statement or directly inside loop body
+                            //     * variables from initializer are passed to rewritten loop body as parameters so they are not captured directly
+                            //     * variables that are declared immediately in loop body will become top level variable after loop is rewritten and thus
+                            //       they will not collide with anything
+                            var isDeclaredInLoop = nodeLinks_1.flags & 262144 /* BlockScopedBindingInLoop */;
+                            var inLoopInitializer = ts.isIterationStatement(container, /*lookInLabeledStatements*/ false);
+                            var inLoopBodyBlock = container.kind === 199 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false);
+                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
+                        }
+                        else {
+                            links.isDeclarationWithCollidingName = false;
+                        }
+                    }
+                }
+                return links.isDeclarationWithCollidingName;
+            }
+            return false;
+        }
+        // When resolved as an expression identifier, if the given node references a nested block scoped entity with
+        // a name that either hides an existing name or might hide it when compiled downlevel,
+        // return the declaration of that entity. Otherwise, return undefined.
+        function getReferencedDeclarationWithCollidingName(node) {
+            var symbol = getReferencedValueSymbol(node);
+            return symbol && isSymbolOfDeclarationWithCollidingName(symbol) ? symbol.valueDeclaration : undefined;
+        }
+        // Return true if the given node is a declaration of a nested block scoped entity with a name that either hides an
+        // existing name or might hide a name when compiled downlevel
+        function isDeclarationWithCollidingName(node) {
+            return isSymbolOfDeclarationWithCollidingName(getSymbolOfNode(node));
+        }
+        function isValueAliasDeclaration(node) {
+            switch (node.kind) {
+                case 229 /* ImportEqualsDeclaration */:
+                case 231 /* ImportClause */:
+                case 232 /* NamespaceImport */:
+                case 234 /* ImportSpecifier */:
+                case 238 /* ExportSpecifier */:
+                    return isAliasResolvedToValue(getSymbolOfNode(node));
+                case 236 /* ExportDeclaration */:
+                    var exportClause = node.exportClause;
+                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
+                case 235 /* ExportAssignment */:
+                    return node.expression && node.expression.kind === 69 /* Identifier */ ? isAliasResolvedToValue(getSymbolOfNode(node)) : true;
+            }
+            return false;
+        }
+        function isTopLevelValueImportEqualsWithEntityName(node) {
+            if (node.parent.kind !== 256 /* SourceFile */ || !ts.isInternalModuleImportEqualsDeclaration(node)) {
+                // parent is not source file or it is not reference to internal module
+                return false;
+            }
+            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
+            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
+        }
+        function isAliasResolvedToValue(symbol) {
+            var target = resolveAlias(symbol);
+            if (target === unknownSymbol) {
+                return true;
+            }
+            // const enums and modules that contain only const enums are not considered values from the emit perspective
+            // unless 'preserveConstEnums' option is set to true
+            return target.flags & 107455 /* Value */ &&
+                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
+        }
+        function isConstEnumOrConstEnumOnlyModule(s) {
+            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
+        }
+        function isReferencedAliasDeclaration(node, checkChildren) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                if (getSymbolLinks(symbol).referenced) {
+                    return true;
+                }
+            }
+            if (checkChildren) {
+                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
+            }
+            return false;
+        }
+        function isImplementationOfOverload(node) {
+            if (ts.nodeIsPresent(node.body)) {
+                var symbol = getSymbolOfNode(node);
+                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
+                // If this function body corresponds to function with multiple signature, it is implementation of overload
+                // e.g.: function foo(a: string): string;
+                //       function foo(a: number): number;
+                //       function foo(a: any) { // This is implementation of the overloads
+                //           return a;
+                //       }
+                return signaturesOfSymbol.length > 1 ||
+                    // If there is single signature for the symbol, it is overload if that signature isn't coming from the node
+                    // e.g.: function foo(a: string): string;
+                    //       function foo(a: any) { // This is implementation of the overloads
+                    //           return a;
+                    //       }
+                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
+            }
+            return false;
+        }
+        function getNodeCheckFlags(node) {
+            return getNodeLinks(node).flags;
+        }
+        function getEnumMemberValue(node) {
+            computeEnumMemberValues(node.parent);
+            return getNodeLinks(node).enumMemberValue;
+        }
+        function getConstantValue(node) {
+            if (node.kind === 255 /* EnumMember */) {
+                return getEnumMemberValue(node);
+            }
+            var symbol = getNodeLinks(node).resolvedSymbol;
+            if (symbol && (symbol.flags & 8 /* EnumMember */)) {
+                // inline property\index accesses only for const enums
+                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
+                    return getEnumMemberValue(symbol.valueDeclaration);
+                }
+            }
+            return undefined;
+        }
+        function isFunctionType(type) {
+            return type.flags & 80896 /* ObjectType */ && getSignaturesOfType(type, 0 /* Call */).length > 0;
+        }
+        function getTypeReferenceSerializationKind(typeName) {
+            // Resolve the symbol as a value to ensure the type can be reached at runtime during emit.
+            var valueSymbol = resolveEntityName(typeName, 107455 /* Value */, /*ignoreErrors*/ true);
+            var constructorType = valueSymbol ? getTypeOfSymbol(valueSymbol) : undefined;
+            if (constructorType && isConstructorType(constructorType)) {
+                return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
+            }
+            // Resolve the symbol as a type so that we can provide a more useful hint for the type serializer.
+            var typeSymbol = resolveEntityName(typeName, 793056 /* Type */, /*ignoreErrors*/ true);
+            // We might not be able to resolve type symbol so use unknown type in that case (eg error case)
+            if (!typeSymbol) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+            var type = getDeclaredTypeOfSymbol(typeSymbol);
+            if (type === unknownType) {
+                return ts.TypeReferenceSerializationKind.Unknown;
+            }
+            else if (type.flags & 1 /* Any */) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+            else if (isTypeOfKind(type, 16 /* Void */)) {
+                return ts.TypeReferenceSerializationKind.VoidType;
+            }
+            else if (isTypeOfKind(type, 8 /* Boolean */)) {
+                return ts.TypeReferenceSerializationKind.BooleanType;
+            }
+            else if (isTypeOfKind(type, 132 /* NumberLike */)) {
+                return ts.TypeReferenceSerializationKind.NumberLikeType;
+            }
+            else if (isTypeOfKind(type, 258 /* StringLike */)) {
+                return ts.TypeReferenceSerializationKind.StringLikeType;
+            }
+            else if (isTypeOfKind(type, 8192 /* Tuple */)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            }
+            else if (isTypeOfKind(type, 16777216 /* ESSymbol */)) {
+                return ts.TypeReferenceSerializationKind.ESSymbolType;
+            }
+            else if (isFunctionType(type)) {
+                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
+            }
+            else if (isArrayType(type)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            }
+            else {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+        }
+        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
+            // Get type of the symbol if this is the valid symbol otherwise get type at location
+            var symbol = getSymbolOfNode(declaration);
+            var type = symbol && !(symbol.flags & (2048 /* TypeLiteral */ | 131072 /* Signature */))
+                ? getTypeOfSymbol(symbol)
+                : unknownType;
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        }
+        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
+            var signature = getSignatureFromDeclaration(signatureDeclaration);
+            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
+        }
+        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
+            var type = getWidenedType(getTypeOfExpression(expr));
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        }
+        function writeBaseConstructorTypeOfClass(node, enclosingDeclaration, flags, writer) {
+            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(node));
+            resolveBaseTypesOfClass(classType);
+            var baseType = classType.resolvedBaseTypes.length ? classType.resolvedBaseTypes[0] : unknownType;
+            getSymbolDisplayBuilder().buildTypeDisplay(baseType, writer, enclosingDeclaration, flags);
+        }
+        function hasGlobalName(name) {
+            return ts.hasProperty(globals, name);
+        }
+        function getReferencedValueSymbol(reference) {
+            return getNodeLinks(reference).resolvedSymbol ||
+                resolveName(reference, reference.text, 107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */, 
+                /*nodeNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+        }
+        function getReferencedValueDeclaration(reference) {
+            ts.Debug.assert(!ts.nodeIsSynthesized(reference));
+            var symbol = getReferencedValueSymbol(reference);
+            return symbol && getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
+        }
+        function createResolver() {
+            // this variable and functions that use it are deliberately moved here from the outer scope
+            // to avoid scope pollution
+            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
+            var fileToDirective;
+            if (resolvedTypeReferenceDirectives) {
+                // populate reverse mapping: file path -> type reference directive that was resolved to this file
+                fileToDirective = ts.createFileMap();
+                for (var key in resolvedTypeReferenceDirectives) {
+                    if (!ts.hasProperty(resolvedTypeReferenceDirectives, key)) {
+                        continue;
+                    }
+                    var resolvedDirective = resolvedTypeReferenceDirectives[key];
+                    if (!resolvedDirective) {
+                        continue;
+                    }
+                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
+                    fileToDirective.set(file.path, key);
+                }
+            }
+            return {
+                getReferencedExportContainer: getReferencedExportContainer,
+                getReferencedImportDeclaration: getReferencedImportDeclaration,
+                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
+                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
+                isValueAliasDeclaration: isValueAliasDeclaration,
+                hasGlobalName: hasGlobalName,
+                isReferencedAliasDeclaration: isReferencedAliasDeclaration,
+                getNodeCheckFlags: getNodeCheckFlags,
+                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
+                isDeclarationVisible: isDeclarationVisible,
+                isImplementationOfOverload: isImplementationOfOverload,
+                writeTypeOfDeclaration: writeTypeOfDeclaration,
+                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
+                writeTypeOfExpression: writeTypeOfExpression,
+                writeBaseConstructorTypeOfClass: writeBaseConstructorTypeOfClass,
+                isSymbolAccessible: isSymbolAccessible,
+                isEntityNameVisible: isEntityNameVisible,
+                getConstantValue: getConstantValue,
+                collectLinkedAliases: collectLinkedAliases,
+                getReferencedValueDeclaration: getReferencedValueDeclaration,
+                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
+                isOptionalParameter: isOptionalParameter,
+                moduleExportsSomeValue: moduleExportsSomeValue,
+                isArgumentsLocalBinding: isArgumentsLocalBinding,
+                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
+                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
+                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol
+            };
+            // defined here to avoid outer scope pollution
+            function getTypeReferenceDirectivesForEntityName(node) {
+                // program does not have any files with type reference directives - bail out
+                if (!fileToDirective) {
+                    return undefined;
+                }
+                // property access can only be used as values
+                // qualified names can only be used as types\namespaces
+                // identifiers are treated as values only if they appear in type queries
+                var meaning = (node.kind === 172 /* PropertyAccessExpression */) || (node.kind === 69 /* Identifier */ && isInTypeQuery(node))
+                    ? 107455 /* Value */ | 1048576 /* ExportValue */
+                    : 793056 /* Type */ | 1536 /* Namespace */;
+                var symbol = resolveEntityName(node, meaning, /*ignoreErrors*/ true);
+                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
+            }
+            // defined here to avoid outer scope pollution
+            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
+                // program does not have any files with type reference directives - bail out
+                if (!fileToDirective) {
+                    return undefined;
+                }
+                if (!isSymbolFromTypeDeclarationFile(symbol)) {
+                    return undefined;
+                }
+                // check what declarations in the symbol can contribute to the target meaning
+                var typeReferenceDirectives;
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    // check meaning of the local symbol to see if declaration needs to be analyzed further
+                    if (decl.symbol && decl.symbol.flags & meaning) {
+                        var file = ts.getSourceFileOfNode(decl);
+                        var typeReferenceDirective = fileToDirective.get(file.path);
+                        if (typeReferenceDirective) {
+                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
+                        }
+                    }
+                }
+                return typeReferenceDirectives;
+            }
+            function isSymbolFromTypeDeclarationFile(symbol) {
+                // bail out if symbol does not have associated declarations (i.e. this is transient symbol created for property in binding pattern)
+                if (!symbol.declarations) {
+                    return false;
+                }
+                // walk the parent chain for symbols to make sure that top level parent symbol is in the global scope
+                // external modules cannot define or contribute to type declaration files
+                var current = symbol;
+                while (true) {
+                    var parent_12 = getParentOfSymbol(current);
+                    if (parent_12) {
+                        current = parent_12;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                if (current.valueDeclaration && current.valueDeclaration.kind === 256 /* SourceFile */ && current.flags & 512 /* ValueModule */) {
+                    return false;
+                }
+                // check that at least one declaration of top level symbol originates from type declaration file
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var file = ts.getSourceFileOfNode(decl);
+                    if (fileToDirective.contains(file.path)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+        }
+        function getExternalModuleFileFromDeclaration(declaration) {
+            var specifier = ts.getExternalModuleName(declaration);
+            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, /*moduleNotFoundError*/ undefined);
+            if (!moduleSymbol) {
+                return undefined;
+            }
+            return ts.getDeclarationOfKind(moduleSymbol, 256 /* SourceFile */);
+        }
+        function initializeTypeChecker() {
+            // Bind all source files and propagate errors
+            ts.forEach(host.getSourceFiles(), function (file) {
+                ts.bindSourceFile(file, compilerOptions);
+            });
+            var augmentations;
+            // Initialize global symbol table
+            ts.forEach(host.getSourceFiles(), function (file) {
+                if (!ts.isExternalOrCommonJsModule(file)) {
+                    mergeSymbolTable(globals, file.locals);
+                }
+                if (file.patternAmbientModules && file.patternAmbientModules.length) {
+                    patternAmbientModules = ts.concatenate(patternAmbientModules, file.patternAmbientModules);
+                }
+                if (file.moduleAugmentations.length) {
+                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
+                }
+                if (file.symbol && file.symbol.globalExports) {
+                    mergeSymbolTable(globals, file.symbol.globalExports);
+                }
+            });
+            if (augmentations) {
+                // merge module augmentations.
+                // this needs to be done after global symbol table is initialized to make sure that all ambient modules are indexed
+                for (var _i = 0, augmentations_1 = augmentations; _i < augmentations_1.length; _i++) {
+                    var list = augmentations_1[_i];
+                    for (var _a = 0, list_2 = list; _a < list_2.length; _a++) {
+                        var augmentation = list_2[_a];
+                        mergeModuleAugmentation(augmentation);
+                    }
+                }
+            }
+            // Setup global builtins
+            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
+            getSymbolLinks(undefinedSymbol).type = undefinedWideningType;
+            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
+            getSymbolLinks(unknownSymbol).type = unknownType;
+            // Initialize special types
+            globalArrayType = getGlobalType("Array", /*arity*/ 1);
+            globalObjectType = getGlobalType("Object");
+            globalFunctionType = getGlobalType("Function");
+            globalStringType = getGlobalType("String");
+            globalNumberType = getGlobalType("Number");
+            globalBooleanType = getGlobalType("Boolean");
+            globalRegExpType = getGlobalType("RegExp");
+            jsxElementType = getExportedTypeFromNamespace("JSX", JsxNames.Element);
+            getGlobalClassDecoratorType = ts.memoize(function () { return getGlobalType("ClassDecorator"); });
+            getGlobalPropertyDecoratorType = ts.memoize(function () { return getGlobalType("PropertyDecorator"); });
+            getGlobalMethodDecoratorType = ts.memoize(function () { return getGlobalType("MethodDecorator"); });
+            getGlobalParameterDecoratorType = ts.memoize(function () { return getGlobalType("ParameterDecorator"); });
+            getGlobalTypedPropertyDescriptorType = ts.memoize(function () { return getGlobalType("TypedPropertyDescriptor", /*arity*/ 1); });
+            getGlobalESSymbolConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Symbol"); });
+            getGlobalPromiseType = ts.memoize(function () { return getGlobalType("Promise", /*arity*/ 1); });
+            tryGetGlobalPromiseType = ts.memoize(function () { return getGlobalSymbol("Promise", 793056 /* Type */, /*diagnostic*/ undefined) && getGlobalPromiseType(); });
+            getGlobalPromiseLikeType = ts.memoize(function () { return getGlobalType("PromiseLike", /*arity*/ 1); });
+            getInstantiatedGlobalPromiseLikeType = ts.memoize(createInstantiatedPromiseLikeType);
+            getGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Promise"); });
+            getGlobalPromiseConstructorLikeType = ts.memoize(function () { return getGlobalType("PromiseConstructorLike"); });
+            getGlobalThenableType = ts.memoize(createThenableType);
+            getGlobalTemplateStringsArrayType = ts.memoize(function () { return getGlobalType("TemplateStringsArray"); });
+            if (languageVersion >= 2 /* ES6 */) {
+                getGlobalESSymbolType = ts.memoize(function () { return getGlobalType("Symbol"); });
+                getGlobalIterableType = ts.memoize(function () { return getGlobalType("Iterable", /*arity*/ 1); });
+                getGlobalIteratorType = ts.memoize(function () { return getGlobalType("Iterator", /*arity*/ 1); });
+                getGlobalIterableIteratorType = ts.memoize(function () { return getGlobalType("IterableIterator", /*arity*/ 1); });
+            }
+            else {
+                getGlobalESSymbolType = ts.memoize(function () { return emptyObjectType; });
+                getGlobalIterableType = ts.memoize(function () { return emptyGenericType; });
+                getGlobalIteratorType = ts.memoize(function () { return emptyGenericType; });
+                getGlobalIterableIteratorType = ts.memoize(function () { return emptyGenericType; });
+            }
+            anyArrayType = createArrayType(anyType);
+            var symbol = getGlobalSymbol("ReadonlyArray", 793056 /* Type */, /*diagnostic*/ undefined);
+            globalReadonlyArrayType = symbol && getTypeOfGlobalSymbol(symbol, /*arity*/ 1);
+            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
+        }
+        function createInstantiatedPromiseLikeType() {
+            var promiseLikeType = getGlobalPromiseLikeType();
+            if (promiseLikeType !== emptyGenericType) {
+                return createTypeReference(promiseLikeType, [anyType]);
+            }
+            return emptyObjectType;
+        }
+        function createThenableType() {
+            // build the thenable type that is used to verify against a non-promise "thenable" operand to `await`.
+            var thenPropertySymbol = createSymbol(67108864 /* Transient */ | 4 /* Property */, "then");
+            getSymbolLinks(thenPropertySymbol).type = globalFunctionType;
+            var thenableType = createObjectType(65536 /* Anonymous */);
+            thenableType.properties = [thenPropertySymbol];
+            thenableType.members = createSymbolTable(thenableType.properties);
+            thenableType.callSignatures = [];
+            thenableType.constructSignatures = [];
+            return thenableType;
+        }
+        // GRAMMAR CHECKING
+        function checkGrammarDecorators(node) {
+            if (!node.decorators) {
+                return false;
+            }
+            if (!ts.nodeCanBeDecorated(node)) {
+                if (node.kind === 147 /* MethodDeclaration */ && !ts.nodeIsPresent(node.body)) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
+                }
+                else {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
+                }
+            }
+            else if (node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */) {
+                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
+                }
+            }
+            return false;
+        }
+        function checkGrammarModifiers(node) {
+            switch (node.kind) {
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 148 /* Constructor */:
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 153 /* IndexSignature */:
+                case 225 /* ModuleDeclaration */:
+                case 230 /* ImportDeclaration */:
+                case 229 /* ImportEqualsDeclaration */:
+                case 236 /* ExportDeclaration */:
+                case 235 /* ExportAssignment */:
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                case 142 /* Parameter */:
+                    break;
+                case 220 /* FunctionDeclaration */:
+                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 118 /* AsyncKeyword */) &&
+                        node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 256 /* SourceFile */) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                case 221 /* ClassDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 200 /* VariableStatement */:
+                case 223 /* TypeAliasDeclaration */:
+                    if (node.modifiers && node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 256 /* SourceFile */) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                case 224 /* EnumDeclaration */:
+                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 74 /* ConstKeyword */) &&
+                        node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 256 /* SourceFile */) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                default:
+                    return false;
+            }
+            if (!node.modifiers) {
+                return;
+            }
+            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
+            var flags = 0;
+            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
+                var modifier = _a[_i];
+                if (modifier.kind !== 128 /* ReadonlyKeyword */) {
+                    if (node.kind === 144 /* PropertySignature */ || node.kind === 146 /* MethodSignature */) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
+                    }
+                    if (node.kind === 153 /* IndexSignature */) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
+                    }
+                }
+                switch (modifier.kind) {
+                    case 74 /* ConstKeyword */:
+                        if (node.kind !== 224 /* EnumDeclaration */ && node.parent.kind === 221 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(74 /* ConstKeyword */));
+                        }
+                        break;
+                    case 112 /* PublicKeyword */:
+                    case 111 /* ProtectedKeyword */:
+                    case 110 /* PrivateKeyword */:
+                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
+                        if (modifier.kind === 111 /* ProtectedKeyword */) {
+                            lastProtected = modifier;
+                        }
+                        else if (modifier.kind === 110 /* PrivateKeyword */) {
+                            lastPrivate = modifier;
+                        }
+                        if (flags & 28 /* AccessibilityModifier */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
+                        }
+                        else if (flags & 32 /* Static */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
+                        }
+                        else if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
+                        }
+                        else if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            if (modifier.kind === 110 /* PrivateKeyword */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
+                            }
+                            else {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
+                            }
+                        }
+                        flags |= ts.modifierToFlag(modifier.kind);
+                        break;
+                    case 113 /* StaticKeyword */:
+                        if (flags & 32 /* Static */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
+                        }
+                        else if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
+                        }
+                        else if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
+                        }
+                        else if (node.kind === 142 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                        }
+                        flags |= 32 /* Static */;
+                        lastStatic = modifier;
+                        break;
+                    case 128 /* ReadonlyKeyword */:
+                        if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
+                        }
+                        else if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */ && node.kind !== 153 /* IndexSignature */ && node.kind !== 142 /* Parameter */) {
+                            // If node.kind === SyntaxKind.Parameter, checkParameter report an error if it's not a parameter property.
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
+                        }
+                        flags |= 64 /* Readonly */;
+                        lastReadonly = modifier;
+                        break;
+                    case 82 /* ExportKeyword */:
+                        if (flags & 1 /* Export */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
+                        }
+                        else if (flags & 2 /* Ambient */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
+                        }
+                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
+                        }
+                        else if (node.kind === 142 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
+                        }
+                        flags |= 1 /* Export */;
+                        break;
+                    case 122 /* DeclareKeyword */:
+                        if (flags & 2 /* Ambient */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
+                        }
+                        else if (node.kind === 142 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
+                        }
+                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 226 /* ModuleBlock */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
+                        }
+                        flags |= 2 /* Ambient */;
+                        lastDeclare = modifier;
+                        break;
+                    case 115 /* AbstractKeyword */:
+                        if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
+                        }
+                        if (node.kind !== 221 /* ClassDeclaration */) {
+                            if (node.kind !== 147 /* MethodDeclaration */ &&
+                                node.kind !== 145 /* PropertyDeclaration */ &&
+                                node.kind !== 149 /* GetAccessor */ &&
+                                node.kind !== 150 /* SetAccessor */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
+                            }
+                            if (!(node.parent.kind === 221 /* ClassDeclaration */ && node.parent.flags & 128 /* Abstract */)) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
+                            }
+                            if (flags & 32 /* Static */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                            }
+                            if (flags & 8 /* Private */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
+                            }
+                        }
+                        flags |= 128 /* Abstract */;
+                        break;
+                    case 118 /* AsyncKeyword */:
+                        if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
+                        }
+                        else if (flags & 2 /* Ambient */ || ts.isInAmbientContext(node.parent)) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.kind === 142 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
+                        }
+                        flags |= 256 /* Async */;
+                        lastAsync = modifier;
+                        break;
+                }
+            }
+            if (node.kind === 148 /* Constructor */) {
+                if (flags & 32 /* Static */) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
+                }
+                if (flags & 128 /* Abstract */) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
+                }
+                else if (flags & 256 /* Async */) {
+                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
+                }
+                else if (flags & 64 /* Readonly */) {
+                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
+                }
+                return;
+            }
+            else if ((node.kind === 230 /* ImportDeclaration */ || node.kind === 229 /* ImportEqualsDeclaration */) && flags & 2 /* Ambient */) {
+                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
+            }
+            else if (node.kind === 142 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && ts.isBindingPattern(node.name)) {
+                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_a_binding_pattern);
+            }
+            if (flags & 256 /* Async */) {
+                return checkGrammarAsyncModifier(node, lastAsync);
+            }
+        }
+        function checkGrammarAsyncModifier(node, asyncModifier) {
+            if (languageVersion < 2 /* ES6 */) {
+                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
+            }
+            switch (node.kind) {
+                case 147 /* MethodDeclaration */:
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    if (!node.asteriskToken) {
+                        return false;
+                    }
+                    break;
+            }
+            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
+        }
+        function checkGrammarForDisallowedTrailingComma(list) {
+            if (list && list.hasTrailingComma) {
+                var start = list.end - ",".length;
+                var end = list.end;
+                var sourceFile = ts.getSourceFileOfNode(list[0]);
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
+            }
+        }
+        function checkGrammarTypeParameterList(node, typeParameters, file) {
+            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
+                return true;
+            }
+            if (typeParameters && typeParameters.length === 0) {
+                var start = typeParameters.pos - "<".length;
+                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
+                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
+            }
+        }
+        function checkGrammarParameterList(parameters) {
+            var seenOptionalParameter = false;
+            var parameterCount = parameters.length;
+            for (var i = 0; i < parameterCount; i++) {
+                var parameter = parameters[i];
+                if (parameter.dotDotDotToken) {
+                    if (i !== (parameterCount - 1)) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
+                    }
+                    if (ts.isBindingPattern(parameter.name)) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                    }
+                    if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
+                    }
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
+                    }
+                }
+                else if (parameter.questionToken) {
+                    seenOptionalParameter = true;
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
+                    }
+                }
+                else if (seenOptionalParameter && !parameter.initializer) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
+                }
+            }
+        }
+        function checkGrammarFunctionLikeDeclaration(node) {
+            // Prevent cascading error by short-circuit
+            var file = ts.getSourceFileOfNode(node);
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node, node.typeParameters, file) ||
+                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
+        }
+        function checkGrammarArrowFunction(node, file) {
+            if (node.kind === 180 /* ArrowFunction */) {
+                var arrowFunction = node;
+                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
+                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
+                if (startLine !== endLine) {
+                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
+                }
+            }
+            return false;
+        }
+        function checkGrammarIndexSignatureParameters(node) {
+            var parameter = node.parameters[0];
+            if (node.parameters.length !== 1) {
+                if (parameter) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                }
+                else {
+                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                }
+            }
+            if (parameter.dotDotDotToken) {
+                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
+            }
+            if (parameter.flags & 1023 /* Modifier */) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
+            }
+            if (parameter.questionToken) {
+                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
+            }
+            if (parameter.initializer) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
+            }
+            if (!parameter.type) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
+            }
+            if (parameter.type.kind !== 132 /* StringKeyword */ && parameter.type.kind !== 130 /* NumberKeyword */) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
+            }
+            if (!node.type) {
+                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
+            }
+        }
+        function checkGrammarIndexSignature(node) {
+            // Prevent cascading error by short-circuit
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
+        }
+        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
+            if (typeArguments && typeArguments.length === 0) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                var start = typeArguments.pos - "<".length;
+                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+            }
+        }
+        function checkGrammarTypeArguments(node, typeArguments) {
+            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
+                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
+        }
+        function checkGrammarForOmittedArgument(node, args) {
+            if (args) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                for (var _i = 0, args_1 = args; _i < args_1.length; _i++) {
+                    var arg = args_1[_i];
+                    if (arg.kind === 193 /* OmittedExpression */) {
+                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
+                    }
+                }
+            }
+        }
+        function checkGrammarArguments(node, args) {
+            return checkGrammarForOmittedArgument(node, args);
+        }
+        function checkGrammarHeritageClause(node) {
+            var types = node.types;
+            if (checkGrammarForDisallowedTrailingComma(types)) {
+                return true;
+            }
+            if (types && types.length === 0) {
+                var listType = ts.tokenToString(node.token);
+                var sourceFile = ts.getSourceFileOfNode(node);
+                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
+            }
+        }
+        function checkGrammarClassDeclarationHeritageClauses(node) {
+            var seenExtendsClause = false;
+            var seenImplementsClause = false;
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 83 /* ExtendsKeyword */) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
+                        }
+                        if (heritageClause.types.length > 1) {
+                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
+                        }
+                        seenExtendsClause = true;
+                    }
+                    else {
+                        ts.Debug.assert(heritageClause.token === 106 /* ImplementsKeyword */);
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
+                        }
+                        seenImplementsClause = true;
+                    }
+                    // Grammar checking heritageClause inside class declaration
+                    checkGrammarHeritageClause(heritageClause);
+                }
+            }
+        }
+        function checkGrammarInterfaceDeclaration(node) {
+            var seenExtendsClause = false;
+            if (node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 83 /* ExtendsKeyword */) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        seenExtendsClause = true;
+                    }
+                    else {
+                        ts.Debug.assert(heritageClause.token === 106 /* ImplementsKeyword */);
+                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
+                    }
+                    // Grammar checking heritageClause inside class declaration
+                    checkGrammarHeritageClause(heritageClause);
+                }
+            }
+            return false;
+        }
+        function checkGrammarComputedPropertyName(node) {
+            // If node is not a computedPropertyName, just skip the grammar checking
+            if (node.kind !== 140 /* ComputedPropertyName */) {
+                return false;
+            }
+            var computedPropertyName = node;
+            if (computedPropertyName.expression.kind === 187 /* BinaryExpression */ && computedPropertyName.expression.operatorToken.kind === 24 /* CommaToken */) {
+                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
+            }
+        }
+        function checkGrammarForGenerator(node) {
+            if (node.asteriskToken) {
+                ts.Debug.assert(node.kind === 220 /* FunctionDeclaration */ ||
+                    node.kind === 179 /* FunctionExpression */ ||
+                    node.kind === 147 /* MethodDeclaration */);
+                if (ts.isInAmbientContext(node)) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
+                }
+                if (!node.body) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
+                }
+                if (languageVersion < 2 /* ES6 */) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
+                }
+            }
+        }
+        function checkGrammarForInvalidQuestionMark(node, questionToken, message) {
+            if (questionToken) {
+                return grammarErrorOnNode(questionToken, message);
+            }
+        }
+        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
+            var seen = {};
+            var Property = 1;
+            var GetAccessor = 2;
+            var SetAccessor = 4;
+            var GetOrSetAccessor = GetAccessor | SetAccessor;
+            var _loop_1 = function(prop) {
+                var name_21 = prop.name;
+                if (prop.kind === 193 /* OmittedExpression */ ||
+                    name_21.kind === 140 /* ComputedPropertyName */) {
+                    // If the name is not a ComputedPropertyName, the grammar checking will skip it
+                    checkGrammarComputedPropertyName(name_21);
+                }
+                if (prop.kind === 254 /* ShorthandPropertyAssignment */ && !inDestructuring && prop.objectAssignmentInitializer) {
+                    // having objectAssignmentInitializer is only valid in ObjectAssignmentPattern
+                    // outside of destructuring it is a syntax error
+                    return { value: grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment) };
+                }
+                // Modifiers are never allowed on properties except for 'async' on a method declaration
+                ts.forEach(prop.modifiers, function (mod) {
+                    if (mod.kind !== 118 /* AsyncKeyword */ || prop.kind !== 147 /* MethodDeclaration */) {
+                        grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
+                    }
+                });
+                // ECMA-262 11.1.5 Object Initializer
+                // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
+                // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
+                // IsDataDescriptor(propId.descriptor) is true.
+                //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
+                //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
+                //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
+                // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
+                var currentKind = void 0;
+                if (prop.kind === 253 /* PropertyAssignment */ || prop.kind === 254 /* ShorthandPropertyAssignment */) {
+                    // Grammar checking for computedPropertyName and shorthandPropertyAssignment
+                    checkGrammarForInvalidQuestionMark(prop, prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
+                    if (name_21.kind === 8 /* NumericLiteral */) {
+                        checkGrammarNumericLiteral(name_21);
+                    }
+                    currentKind = Property;
+                }
+                else if (prop.kind === 147 /* MethodDeclaration */) {
+                    currentKind = Property;
+                }
+                else if (prop.kind === 149 /* GetAccessor */) {
+                    currentKind = GetAccessor;
+                }
+                else if (prop.kind === 150 /* SetAccessor */) {
+                    currentKind = SetAccessor;
+                }
+                else {
+                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
+                }
+                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_21);
+                if (effectiveName === undefined) {
+                    return "continue";
+                }
+                if (!ts.hasProperty(seen, effectiveName)) {
+                    seen[effectiveName] = currentKind;
+                }
+                else {
+                    var existingKind = seen[effectiveName];
+                    if (currentKind === Property && existingKind === Property) {
+                        grammarErrorOnNode(name_21, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_21));
+                    }
+                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
+                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
+                            seen[effectiveName] = currentKind | existingKind;
+                        }
+                        else {
+                            return { value: grammarErrorOnNode(name_21, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
+                        }
+                    }
+                    else {
+                        return { value: grammarErrorOnNode(name_21, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name) };
+                    }
+                }
+            };
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var prop = _a[_i];
+                var state_2 = _loop_1(prop);
+                if (typeof state_2 === "object") return state_2.value;
+            }
+        }
+        function checkGrammarJsxElement(node) {
+            var seen = {};
+            for (var _i = 0, _a = node.attributes; _i < _a.length; _i++) {
+                var attr = _a[_i];
+                if (attr.kind === 247 /* JsxSpreadAttribute */) {
+                    continue;
+                }
+                var jsxAttr = attr;
+                var name_22 = jsxAttr.name;
+                if (!ts.hasProperty(seen, name_22.text)) {
+                    seen[name_22.text] = true;
+                }
+                else {
+                    return grammarErrorOnNode(name_22, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
+                }
+                var initializer = jsxAttr.initializer;
+                if (initializer && initializer.kind === 248 /* JsxExpression */ && !initializer.expression) {
+                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
+                }
+            }
+        }
+        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
+            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
+                return true;
+            }
+            if (forInOrOfStatement.initializer.kind === 219 /* VariableDeclarationList */) {
+                var variableList = forInOrOfStatement.initializer;
+                if (!checkGrammarVariableDeclarationList(variableList)) {
+                    var declarations = variableList.declarations;
+                    // declarations.length can be zero if there is an error in variable declaration in for-of or for-in
+                    // See http://www.ecma-international.org/ecma-262/6.0/#sec-for-in-and-for-of-statements for details
+                    // For example:
+                    //      var let = 10;
+                    //      for (let of [1,2,3]) {} // this is invalid ES6 syntax
+                    //      for (let in [1,2,3]) {} // this is invalid ES6 syntax
+                    // We will then want to skip on grammar checking on variableList declaration
+                    if (!declarations.length) {
+                        return false;
+                    }
+                    if (declarations.length > 1) {
+                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
+                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
+                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
+                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
+                    }
+                    var firstDeclaration = declarations[0];
+                    if (firstDeclaration.initializer) {
+                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
+                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
+                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
+                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
+                    }
+                    if (firstDeclaration.type) {
+                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
+                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
+                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
+                        return grammarErrorOnNode(firstDeclaration, diagnostic);
+                    }
+                }
+            }
+            return false;
+        }
+        function checkGrammarAccessor(accessor) {
+            var kind = accessor.kind;
+            if (languageVersion < 1 /* ES5 */) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
+            }
+            else if (ts.isInAmbientContext(accessor)) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
+            }
+            else if (accessor.body === undefined && !(accessor.flags & 128 /* Abstract */)) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+            }
+            else if (accessor.typeParameters) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
+            }
+            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
+                return grammarErrorOnNode(accessor.name, kind === 149 /* GetAccessor */ ?
+                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
+                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
+            }
+            else if (kind === 150 /* SetAccessor */) {
+                if (accessor.type) {
+                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
+                }
+                else {
+                    var parameter = accessor.parameters[0];
+                    if (parameter.dotDotDotToken) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
+                    }
+                    else if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
+                    }
+                    else if (parameter.initializer) {
+                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
+                    }
+                }
+            }
+        }
+        /** Does the accessor have the right number of parameters?
+
+            A get accessor has no parameters or a single `this` parameter.
+            A set accessor has one parameter or a `this` parameter and one more parameter */
+        function doesAccessorHaveCorrectParameterCount(accessor) {
+            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 149 /* GetAccessor */ ? 0 : 1);
+        }
+        function getAccessorThisParameter(accessor) {
+            if (accessor.parameters.length === (accessor.kind === 149 /* GetAccessor */ ? 1 : 2) &&
+                accessor.parameters[0].name.kind === 69 /* Identifier */ &&
+                accessor.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */) {
+                return accessor.parameters[0];
+            }
+        }
+        function getFunctionLikeThisParameter(func) {
+            if (func.parameters.length &&
+                func.parameters[0].name.kind === 69 /* Identifier */ &&
+                func.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */) {
+                return func.parameters[0];
+            }
+        }
+        function checkGrammarForNonSymbolComputedProperty(node, message) {
+            if (ts.isDynamicName(node)) {
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarMethod(node) {
+            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
+                checkGrammarFunctionLikeDeclaration(node) ||
+                checkGrammarForGenerator(node)) {
+                return true;
+            }
+            if (node.parent.kind === 171 /* ObjectLiteralExpression */) {
+                if (checkGrammarForInvalidQuestionMark(node, node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
+                    return true;
+                }
+                else if (node.body === undefined) {
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+                }
+            }
+            if (ts.isClassLike(node.parent)) {
+                // Technically, computed properties in ambient contexts is disallowed
+                // for property declarations and accessors too, not just methods.
+                // However, property declarations disallow computed names in general,
+                // and accessors are not allowed in ambient contexts in general,
+                // so this error only really matters for methods.
+                if (ts.isInAmbientContext(node)) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
+                }
+                else if (!node.body) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
+                }
+            }
+            else if (node.parent.kind === 222 /* InterfaceDeclaration */) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
+            }
+            else if (node.parent.kind === 159 /* TypeLiteral */) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
+            }
+        }
+        function checkGrammarBreakOrContinueStatement(node) {
+            var current = node;
+            while (current) {
+                if (ts.isFunctionLike(current)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
+                }
+                switch (current.kind) {
+                    case 214 /* LabeledStatement */:
+                        if (node.label && current.label.text === node.label.text) {
+                            // found matching label - verify that label usage is correct
+                            // continue can only target labels that are on iteration statements
+                            var isMisplacedContinueLabel = node.kind === 209 /* ContinueStatement */
+                                && !ts.isIterationStatement(current.statement, /*lookInLabeledStatement*/ true);
+                            if (isMisplacedContinueLabel) {
+                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
+                            }
+                            return false;
+                        }
+                        break;
+                    case 213 /* SwitchStatement */:
+                        if (node.kind === 210 /* BreakStatement */ && !node.label) {
+                            // unlabeled break within switch statement - ok
+                            return false;
+                        }
+                        break;
+                    default:
+                        if (ts.isIterationStatement(current, /*lookInLabeledStatement*/ false) && !node.label) {
+                            // unlabeled break or continue within iteration statement - ok
+                            return false;
+                        }
+                        break;
+                }
+                current = current.parent;
+            }
+            if (node.label) {
+                var message = node.kind === 210 /* BreakStatement */
+                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+            else {
+                var message = node.kind === 210 /* BreakStatement */
+                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarBindingElement(node) {
+            if (node.dotDotDotToken) {
+                var elements = node.parent.elements;
+                if (node !== ts.lastOrUndefined(elements)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                }
+                if (node.name.kind === 168 /* ArrayBindingPattern */ || node.name.kind === 167 /* ObjectBindingPattern */) {
+                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                }
+                if (node.initializer) {
+                    // Error on equals token which immediate precedes the initializer
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                }
+            }
+        }
+        function checkGrammarVariableDeclaration(node) {
+            if (node.parent.parent.kind !== 207 /* ForInStatement */ && node.parent.parent.kind !== 208 /* ForOfStatement */) {
+                if (ts.isInAmbientContext(node)) {
+                    if (node.initializer) {
+                        // Error on equals token which immediate precedes the initializer
+                        var equalsTokenLength = "=".length;
+                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+                    }
+                }
+                else if (!node.initializer) {
+                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
+                    }
+                    if (ts.isConst(node)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
+                    }
+                }
+            }
+            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
+            // 1. LexicalDeclaration : LetOrConst BindingList ;
+            // It is a Syntax Error if the BoundNames of BindingList contains "let".
+            // 2. ForDeclaration: ForDeclaration : LetOrConst ForBinding
+            // It is a Syntax Error if the BoundNames of ForDeclaration contains "let".
+            // It is a SyntaxError if a VariableDeclaration or VariableDeclarationNoIn occurs within strict code
+            // and its Identifier is eval or arguments
+            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
+        }
+        function checkGrammarNameInLetOrConstDeclarations(name) {
+            if (name.kind === 69 /* Identifier */) {
+                if (name.originalKeywordKind === 108 /* LetKeyword */) {
+                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
+                }
+            }
+            else {
+                var elements = name.elements;
+                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
+                    var element = elements_2[_i];
+                    if (element.kind !== 193 /* OmittedExpression */) {
+                        checkGrammarNameInLetOrConstDeclarations(element.name);
+                    }
+                }
+            }
+        }
+        function checkGrammarVariableDeclarationList(declarationList) {
+            var declarations = declarationList.declarations;
+            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
+                return true;
+            }
+            if (!declarationList.declarations.length) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
+            }
+        }
+        function allowLetAndConstDeclarations(parent) {
+            switch (parent.kind) {
+                case 203 /* IfStatement */:
+                case 204 /* DoStatement */:
+                case 205 /* WhileStatement */:
+                case 212 /* WithStatement */:
+                case 206 /* ForStatement */:
+                case 207 /* ForInStatement */:
+                case 208 /* ForOfStatement */:
+                    return false;
+                case 214 /* LabeledStatement */:
+                    return allowLetAndConstDeclarations(parent.parent);
+            }
+            return true;
+        }
+        function checkGrammarForDisallowedLetOrConstStatement(node) {
+            if (!allowLetAndConstDeclarations(node.parent)) {
+                if (ts.isLet(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
+                }
+                else if (ts.isConst(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
+                }
+            }
+        }
+        function hasParseDiagnostics(sourceFile) {
+            return sourceFile.parseDiagnostics.length > 0;
+        }
+        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function checkGrammarConstructorTypeParameters(node) {
+            if (node.typeParameters) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarConstructorTypeAnnotation(node) {
+            if (node.type) {
+                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarProperty(node) {
+            if (ts.isClassLike(node.parent)) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+            }
+            else if (node.parent.kind === 222 /* InterfaceDeclaration */) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
+                }
+            }
+            else if (node.parent.kind === 159 /* TypeLiteral */) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
+                }
+            }
+            if (ts.isInAmbientContext(node) && node.initializer) {
+                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+            }
+        }
+        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
+            // A declare modifier is required for any top level .d.ts declaration except export=, export default,
+            // interfaces and imports categories:
+            //
+            //  DeclarationElement:
+            //     ExportAssignment
+            //     export_opt   InterfaceDeclaration
+            //     export_opt   TypeAliasDeclaration
+            //     export_opt   ImportDeclaration
+            //     export_opt   ExternalImportDeclaration
+            //     export_opt   AmbientDeclaration
+            //
+            // TODO: The spec needs to be amended to reflect this grammar.
+            if (node.kind === 222 /* InterfaceDeclaration */ ||
+                node.kind === 223 /* TypeAliasDeclaration */ ||
+                node.kind === 230 /* ImportDeclaration */ ||
+                node.kind === 229 /* ImportEqualsDeclaration */ ||
+                node.kind === 236 /* ExportDeclaration */ ||
+                node.kind === 235 /* ExportAssignment */ ||
+                (node.flags & 2 /* Ambient */) ||
+                (node.flags & (1 /* Export */ | 512 /* Default */))) {
+                return false;
+            }
+            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
+        }
+        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (ts.isDeclaration(decl) || decl.kind === 200 /* VariableStatement */) {
+                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
+                        return true;
+                    }
+                }
+            }
+        }
+        function checkGrammarSourceFile(node) {
+            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
+        }
+        function checkGrammarStatementInAmbientContext(node) {
+            if (ts.isInAmbientContext(node)) {
+                // An accessors is already reported about the ambient context
+                if (isAccessor(node.parent.kind)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
+                }
+                // Find containing block which is either Block, ModuleBlock, SourceFile
+                var links = getNodeLinks(node);
+                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
+                }
+                // We are either parented by another statement, or some sort of block.
+                // If we're in a block, we only want to really report an error once
+                // to prevent noisiness.  So use a bit on the block to indicate if
+                // this has already been reported, and don't report if it has.
+                //
+                if (node.parent.kind === 199 /* Block */ || node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
+                    var links_1 = getNodeLinks(node.parent);
+                    // Check if the containing block ever report this error
+                    if (!links_1.hasReportedStatementInAmbientContext) {
+                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
+                    }
+                }
+                else {
+                }
+            }
+        }
+        function checkGrammarNumericLiteral(node) {
+            // Grammar checking
+            if (node.isOctalLiteral && languageVersion >= 1 /* ES5 */) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
+            }
+        }
+        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span), /*length*/ 0, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        var _a;
+    }
+    ts.createTypeChecker = createTypeChecker;
+})(ts || (ts = {}));
+/// <reference path="checker.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var nullSourceMapWriter;
+    // Used for initialize lastEncodedSourceMapSpan and reset lastEncodedSourceMapSpan when updateLastEncodedAndRecordedSpans
+    var defaultLastEncodedSourceMapSpan = {
+        emittedLine: 1,
+        emittedColumn: 1,
+        sourceLine: 1,
+        sourceColumn: 1,
+        sourceIndex: 0
+    };
+    function getNullSourceMapWriter() {
+        if (nullSourceMapWriter === undefined) {
+            nullSourceMapWriter = {
+                getSourceMapData: function () { return undefined; },
+                setSourceFile: function (sourceFile) { },
+                emitStart: function (range) { },
+                emitEnd: function (range, stopOverridingSpan) { },
+                emitPos: function (pos) { },
+                changeEmitSourcePos: function () { },
+                getText: function () { return undefined; },
+                getSourceMappingURL: function () { return undefined; },
+                initialize: function (filePath, sourceMapFilePath, sourceFiles, isBundledEmit) { },
+                reset: function () { }
+            };
+        }
+        return nullSourceMapWriter;
+    }
+    ts.getNullSourceMapWriter = getNullSourceMapWriter;
+    function createSourceMapWriter(host, writer) {
+        var compilerOptions = host.getCompilerOptions();
+        var currentSourceFile;
+        var sourceMapDir; // The directory in which sourcemap will be
+        var stopOverridingSpan = false;
+        var modifyLastSourcePos = false;
+        // Current source map file and its index in the sources list
+        var sourceMapSourceIndex;
+        // Last recorded and encoded spans
+        var lastRecordedSourceMapSpan;
+        var lastEncodedSourceMapSpan;
+        var lastEncodedNameIndex;
+        // Source map data
+        var sourceMapData;
+        return {
+            getSourceMapData: function () { return sourceMapData; },
+            setSourceFile: setSourceFile,
+            emitPos: emitPos,
+            emitStart: emitStart,
+            emitEnd: emitEnd,
+            changeEmitSourcePos: changeEmitSourcePos,
+            getText: getText,
+            getSourceMappingURL: getSourceMappingURL,
+            initialize: initialize,
+            reset: reset
+        };
+        function initialize(filePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
+            if (sourceMapData) {
+                reset();
+            }
+            currentSourceFile = undefined;
+            // Current source map file and its index in the sources list
+            sourceMapSourceIndex = -1;
+            // Last recorded and encoded spans
+            lastRecordedSourceMapSpan = undefined;
+            lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
+            lastEncodedNameIndex = 0;
+            // Initialize source map data
+            sourceMapData = {
+                sourceMapFilePath: sourceMapFilePath,
+                jsSourceMappingURL: !compilerOptions.inlineSourceMap ? ts.getBaseFileName(ts.normalizeSlashes(sourceMapFilePath)) : undefined,
+                sourceMapFile: ts.getBaseFileName(ts.normalizeSlashes(filePath)),
+                sourceMapSourceRoot: compilerOptions.sourceRoot || "",
+                sourceMapSources: [],
+                inputSourceFileNames: [],
+                sourceMapNames: [],
+                sourceMapMappings: "",
+                sourceMapSourcesContent: compilerOptions.inlineSources ? [] : undefined,
+                sourceMapDecodedMappings: []
+            };
+            // Normalize source root and make sure it has trailing "/" so that it can be used to combine paths with the
+            // relative paths of the sources list in the sourcemap
+            sourceMapData.sourceMapSourceRoot = ts.normalizeSlashes(sourceMapData.sourceMapSourceRoot);
+            if (sourceMapData.sourceMapSourceRoot.length && sourceMapData.sourceMapSourceRoot.charCodeAt(sourceMapData.sourceMapSourceRoot.length - 1) !== 47 /* slash */) {
+                sourceMapData.sourceMapSourceRoot += ts.directorySeparator;
+            }
+            if (compilerOptions.mapRoot) {
+                sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
+                if (!isBundledEmit) {
+                    ts.Debug.assert(sourceFiles.length === 1);
+                    // For modules or multiple emit files the mapRoot will have directory structure like the sources
+                    // So if src\a.ts and src\lib\b.ts are compiled together user would be moving the maps into mapRoot\a.js.map and mapRoot\lib\b.js.map
+                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFiles[0], host, sourceMapDir));
+                }
+                if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
+                    // The relative paths are relative to the common directory
+                    sourceMapDir = ts.combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
+                    sourceMapData.jsSourceMappingURL = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizePath(filePath)), // get the relative sourceMapDir path based on jsFilePath
+                    ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), // this is where user expects to see sourceMap
+                    host.getCurrentDirectory(), host.getCanonicalFileName, 
+                    /*isAbsolutePathAnUrl*/ true);
+                }
+                else {
+                    sourceMapData.jsSourceMappingURL = ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL);
+                }
+            }
+            else {
+                sourceMapDir = ts.getDirectoryPath(ts.normalizePath(filePath));
+            }
+        }
+        function reset() {
+            currentSourceFile = undefined;
+            sourceMapDir = undefined;
+            sourceMapSourceIndex = undefined;
+            lastRecordedSourceMapSpan = undefined;
+            lastEncodedSourceMapSpan = undefined;
+            lastEncodedNameIndex = undefined;
+            sourceMapData = undefined;
+        }
+        function updateLastEncodedAndRecordedSpans() {
+            if (modifyLastSourcePos) {
+                // Reset the source pos
+                modifyLastSourcePos = false;
+                // Change Last recorded Map with last encoded emit line and character
+                lastRecordedSourceMapSpan.emittedLine = lastEncodedSourceMapSpan.emittedLine;
+                lastRecordedSourceMapSpan.emittedColumn = lastEncodedSourceMapSpan.emittedColumn;
+                // Pop sourceMapDecodedMappings to remove last entry
+                sourceMapData.sourceMapDecodedMappings.pop();
+                // Point the lastEncodedSourceMapSpace to the previous encoded sourceMapSpan
+                // If the list is empty which indicates that we are at the beginning of the file,
+                // we have to reset it to default value (same value when we first initialize sourceMapWriter)
+                lastEncodedSourceMapSpan = sourceMapData.sourceMapDecodedMappings.length ?
+                    sourceMapData.sourceMapDecodedMappings[sourceMapData.sourceMapDecodedMappings.length - 1] :
+                    defaultLastEncodedSourceMapSpan;
+                // TODO: Update lastEncodedNameIndex
+                // Since we dont support this any more, lets not worry about it right now.
+                // When we start supporting nameIndex, we will get back to this
+                // Change the encoded source map
+                var sourceMapMappings = sourceMapData.sourceMapMappings;
+                var lenthToSet = sourceMapMappings.length - 1;
+                for (; lenthToSet >= 0; lenthToSet--) {
+                    var currentChar = sourceMapMappings.charAt(lenthToSet);
+                    if (currentChar === ",") {
+                        // Separator for the entry found
+                        break;
+                    }
+                    if (currentChar === ";" && lenthToSet !== 0 && sourceMapMappings.charAt(lenthToSet - 1) !== ";") {
+                        // Last line separator found
+                        break;
+                    }
+                }
+                sourceMapData.sourceMapMappings = sourceMapMappings.substr(0, Math.max(0, lenthToSet));
+            }
+        }
+        // Encoding for sourcemap span
+        function encodeLastRecordedSourceMapSpan() {
+            if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) {
+                return;
+            }
+            var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn;
+            // Line/Comma delimiters
+            if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) {
+                // Emit comma to separate the entry
+                if (sourceMapData.sourceMapMappings) {
+                    sourceMapData.sourceMapMappings += ",";
+                }
+            }
+            else {
+                // Emit line delimiters
+                for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) {
+                    sourceMapData.sourceMapMappings += ";";
+                }
+                prevEncodedEmittedColumn = 1;
+            }
+            // 1. Relative Column 0 based
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn);
+            // 2. Relative sourceIndex
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex);
+            // 3. Relative sourceLine 0 based
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine);
+            // 4. Relative sourceColumn 0 based
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn);
+            // 5. Relative namePosition 0 based
+            if (lastRecordedSourceMapSpan.nameIndex >= 0) {
+                ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this");
+                sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex);
+                lastEncodedNameIndex = lastRecordedSourceMapSpan.nameIndex;
+            }
+            lastEncodedSourceMapSpan = lastRecordedSourceMapSpan;
+            sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan);
+        }
+        function emitPos(pos) {
+            if (pos === -1) {
+                return;
+            }
+            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSourceFile, pos);
+            // Convert the location to be one-based.
+            sourceLinePos.line++;
+            sourceLinePos.character++;
+            var emittedLine = writer.getLine();
+            var emittedColumn = writer.getColumn();
+            // If this location wasn't recorded or the location in source is going backwards, record the span
+            if (!lastRecordedSourceMapSpan ||
+                lastRecordedSourceMapSpan.emittedLine !== emittedLine ||
+                lastRecordedSourceMapSpan.emittedColumn !== emittedColumn ||
+                (lastRecordedSourceMapSpan.sourceIndex === sourceMapSourceIndex &&
+                    (lastRecordedSourceMapSpan.sourceLine > sourceLinePos.line ||
+                        (lastRecordedSourceMapSpan.sourceLine === sourceLinePos.line && lastRecordedSourceMapSpan.sourceColumn > sourceLinePos.character)))) {
+                // Encode the last recordedSpan before assigning new
+                encodeLastRecordedSourceMapSpan();
+                // New span
+                lastRecordedSourceMapSpan = {
+                    emittedLine: emittedLine,
+                    emittedColumn: emittedColumn,
+                    sourceLine: sourceLinePos.line,
+                    sourceColumn: sourceLinePos.character,
+                    sourceIndex: sourceMapSourceIndex
+                };
+                stopOverridingSpan = false;
+            }
+            else if (!stopOverridingSpan) {
+                // Take the new pos instead since there is no change in emittedLine and column since last location
+                lastRecordedSourceMapSpan.sourceLine = sourceLinePos.line;
+                lastRecordedSourceMapSpan.sourceColumn = sourceLinePos.character;
+                lastRecordedSourceMapSpan.sourceIndex = sourceMapSourceIndex;
+            }
+            updateLastEncodedAndRecordedSpans();
+        }
+        function getStartPos(range) {
+            var rangeHasDecorators = !!range.decorators;
+            return range.pos !== -1 ? ts.skipTrivia(currentSourceFile.text, rangeHasDecorators ? range.decorators.end : range.pos) : -1;
+        }
+        function emitStart(range) {
+            emitPos(getStartPos(range));
+        }
+        function emitEnd(range, stopOverridingEnd) {
+            emitPos(range.end);
+            stopOverridingSpan = stopOverridingEnd;
+        }
+        function changeEmitSourcePos() {
+            ts.Debug.assert(!modifyLastSourcePos);
+            modifyLastSourcePos = true;
+        }
+        function setSourceFile(sourceFile) {
+            currentSourceFile = sourceFile;
+            // Add the file to tsFilePaths
+            // If sourceroot option: Use the relative path corresponding to the common directory path
+            // otherwise source locations relative to map file location
+            var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
+            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSourceFile.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
+            /*isAbsolutePathAnUrl*/ true);
+            sourceMapSourceIndex = ts.indexOf(sourceMapData.sourceMapSources, source);
+            if (sourceMapSourceIndex === -1) {
+                sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
+                sourceMapData.sourceMapSources.push(source);
+                // The one that can be used from program to get the actual source file
+                sourceMapData.inputSourceFileNames.push(sourceFile.fileName);
+                if (compilerOptions.inlineSources) {
+                    sourceMapData.sourceMapSourcesContent.push(sourceFile.text);
+                }
+            }
+        }
+        function getText() {
+            encodeLastRecordedSourceMapSpan();
+            return ts.stringify({
+                version: 3,
+                file: sourceMapData.sourceMapFile,
+                sourceRoot: sourceMapData.sourceMapSourceRoot,
+                sources: sourceMapData.sourceMapSources,
+                names: sourceMapData.sourceMapNames,
+                mappings: sourceMapData.sourceMapMappings,
+                sourcesContent: sourceMapData.sourceMapSourcesContent
+            });
+        }
+        function getSourceMappingURL() {
+            if (compilerOptions.inlineSourceMap) {
+                // Encode the sourceMap into the sourceMap url
+                var base64SourceMapText = ts.convertToBase64(getText());
+                return sourceMapData.jsSourceMappingURL = "data:application/json;base64," + base64SourceMapText;
+            }
+            else {
+                return sourceMapData.jsSourceMappingURL;
+            }
+        }
+    }
+    ts.createSourceMapWriter = createSourceMapWriter;
+    var base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    function base64FormatEncode(inValue) {
+        if (inValue < 64) {
+            return base64Chars.charAt(inValue);
+        }
+        throw TypeError(inValue + ": not a 64 based value");
+    }
+    function base64VLQFormatEncode(inValue) {
+        // Add a new least significant bit that has the sign of the value.
+        // if negative number the least significant bit that gets added to the number has value 1
+        // else least significant bit value that gets added is 0
+        // eg. -1 changes to binary : 01 [1] => 3
+        //     +1 changes to binary : 01 [0] => 2
+        if (inValue < 0) {
+            inValue = ((-inValue) << 1) + 1;
+        }
+        else {
+            inValue = inValue << 1;
+        }
+        // Encode 5 bits at a time starting from least significant bits
+        var encodedStr = "";
+        do {
+            var currentDigit = inValue & 31; // 11111
+            inValue = inValue >> 5;
+            if (inValue > 0) {
+                // There are still more digits to decode, set the msb (6th bit)
+                currentDigit = currentDigit | 32;
+            }
+            encodedStr = encodedStr + base64FormatEncode(currentDigit);
+        } while (inValue > 0);
+        return encodedStr;
+    }
+})(ts || (ts = {}));
+/// <reference path="checker.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
+        var declarationDiagnostics = ts.createDiagnosticCollection();
+        ts.forEachExpectedEmitFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
+        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
+        function getDeclarationDiagnosticsFromFile(_a, sources, isBundledEmit) {
+            var declarationFilePath = _a.declarationFilePath;
+            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sources, isBundledEmit);
+        }
+    }
+    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
+    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit) {
+        var newLine = host.getNewLine();
+        var compilerOptions = host.getCompilerOptions();
+        var write;
+        var writeLine;
+        var increaseIndent;
+        var decreaseIndent;
+        var writeTextOfNode;
+        var writer;
+        createAndSetNewTextWriterWithSymbolWriter();
+        var enclosingDeclaration;
+        var resultHasExternalModuleIndicator;
+        var currentText;
+        var currentLineMap;
+        var currentIdentifiers;
+        var isCurrentFileExternalModule;
+        var reportedDeclarationError = false;
+        var errorNameNode;
+        var emitJsDocComments = compilerOptions.removeComments ? function (declaration) { } : writeJsDocComments;
+        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
+        var noDeclare;
+        var moduleElementDeclarationEmitInfo = [];
+        var asynchronousSubModuleDeclarationEmitInfo;
+        // Contains the reference paths that needs to go in the declaration file.
+        // Collecting this separately because reference paths need to be first thing in the declaration file
+        // and we could be collecting these paths from multiple files into single one with --out option
+        var referencesOutput = "";
+        var usedTypeDirectiveReferences;
+        // Emit references corresponding to each file
+        var emittedReferencedFiles = [];
+        var addedGlobalFileReference = false;
+        var allSourcesModuleElementDeclarationEmitInfo = [];
+        ts.forEach(sourceFiles, function (sourceFile) {
+            // Dont emit for javascript file
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                return;
+            }
+            // Check what references need to be added
+            if (!compilerOptions.noResolve) {
+                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
+                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
+                    // Emit reference in dts, if the file reference was not already emitted
+                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
+                        // Add a reference to generated dts file,
+                        // global file reference is added only
+                        //  - if it is not bundled emit (because otherwise it would be self reference)
+                        //  - and it is not already added
+                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference)) {
+                            addedGlobalFileReference = true;
+                        }
+                        emittedReferencedFiles.push(referencedFile);
+                    }
+                });
+            }
+            resultHasExternalModuleIndicator = false;
+            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
+                noDeclare = false;
+                emitSourceFile(sourceFile);
+            }
+            else if (ts.isExternalModule(sourceFile)) {
+                noDeclare = true;
+                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
+                writeLine();
+                increaseIndent();
+                emitSourceFile(sourceFile);
+                decreaseIndent();
+                write("}");
+                writeLine();
+            }
+            // create asynchronous output for the importDeclarations
+            if (moduleElementDeclarationEmitInfo.length) {
+                var oldWriter = writer;
+                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
+                        ts.Debug.assert(aliasEmitInfo.node.kind === 230 /* ImportDeclaration */);
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            increaseIndent();
+                        }
+                        writeImportDeclaration(aliasEmitInfo.node);
+                        aliasEmitInfo.asynchronousOutput = writer.getText();
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            decreaseIndent();
+                        }
+                    }
+                });
+                setWriter(oldWriter);
+                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
+                moduleElementDeclarationEmitInfo = [];
+            }
+            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
+                // if file was external module with augmentations - this fact should be preserved in .d.ts as well.
+                // in case if we didn't write any external module specifiers in .d.ts we need to emit something
+                // that will force compiler to think that this file is an external module - 'export {}' is a reasonable choice here.
+                write("export {};");
+                writeLine();
+            }
+        });
+        if (usedTypeDirectiveReferences) {
+            for (var directive in usedTypeDirectiveReferences) {
+                if (ts.hasProperty(usedTypeDirectiveReferences, directive)) {
+                    referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
+                }
+            }
+        }
+        return {
+            reportedDeclarationError: reportedDeclarationError,
+            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
+            synchronousDeclarationOutput: writer.getText(),
+            referencesOutput: referencesOutput
+        };
+        function hasInternalAnnotation(range) {
+            var comment = currentText.substring(range.pos, range.end);
+            return comment.indexOf("@internal") >= 0;
+        }
+        function stripInternal(node) {
+            if (node) {
+                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
+                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
+                    return;
+                }
+                emitNode(node);
+            }
+        }
+        function createAndSetNewTextWriterWithSymbolWriter() {
+            var writer = ts.createTextWriter(newLine);
+            writer.trackSymbol = trackSymbol;
+            writer.reportInaccessibleThisError = reportInaccessibleThisError;
+            writer.writeKeyword = writer.write;
+            writer.writeOperator = writer.write;
+            writer.writePunctuation = writer.write;
+            writer.writeSpace = writer.write;
+            writer.writeStringLiteral = writer.writeLiteral;
+            writer.writeParameter = writer.write;
+            writer.writeSymbol = writer.write;
+            setWriter(writer);
+        }
+        function setWriter(newWriter) {
+            writer = newWriter;
+            write = newWriter.write;
+            writeTextOfNode = newWriter.writeTextOfNode;
+            writeLine = newWriter.writeLine;
+            increaseIndent = newWriter.increaseIndent;
+            decreaseIndent = newWriter.decreaseIndent;
+        }
+        function writeAsynchronousModuleElements(nodes) {
+            var oldWriter = writer;
+            ts.forEach(nodes, function (declaration) {
+                var nodeToCheck;
+                if (declaration.kind === 218 /* VariableDeclaration */) {
+                    nodeToCheck = declaration.parent.parent;
+                }
+                else if (declaration.kind === 233 /* NamedImports */ || declaration.kind === 234 /* ImportSpecifier */ || declaration.kind === 231 /* ImportClause */) {
+                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
+                }
+                else {
+                    nodeToCheck = declaration;
+                }
+                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
+                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
+                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
+                }
+                // If the alias was marked as not visible when we saw its declaration, we would have saved the aliasEmitInfo, but if we haven't yet visited the alias declaration
+                // then we don't need to write it at this point. We will write it when we actually see its declaration
+                // Eg.
+                // export function bar(a: foo.Foo) { }
+                // import foo = require("foo");
+                // Writing of function bar would mark alias declaration foo as visible but we haven't yet visited that declaration so do nothing,
+                // we would write alias foo declaration when we visit it since it would now be marked as visible
+                if (moduleElementEmitInfo) {
+                    if (moduleElementEmitInfo.node.kind === 230 /* ImportDeclaration */) {
+                        // we have to create asynchronous output only after we have collected complete information
+                        // because it is possible to enable multiple bindings as asynchronously visible
+                        moduleElementEmitInfo.isVisible = true;
+                    }
+                    else {
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
+                            increaseIndent();
+                        }
+                        if (nodeToCheck.kind === 225 /* ModuleDeclaration */) {
+                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
+                            asynchronousSubModuleDeclarationEmitInfo = [];
+                        }
+                        writeModuleElement(nodeToCheck);
+                        if (nodeToCheck.kind === 225 /* ModuleDeclaration */) {
+                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
+                            asynchronousSubModuleDeclarationEmitInfo = undefined;
+                        }
+                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
+                    }
+                }
+            });
+            setWriter(oldWriter);
+        }
+        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
+            if (!typeReferenceDirectives) {
+                return;
+            }
+            if (!usedTypeDirectiveReferences) {
+                usedTypeDirectiveReferences = {};
+            }
+            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
+                var directive = typeReferenceDirectives_1[_i];
+                if (!ts.hasProperty(usedTypeDirectiveReferences, directive)) {
+                    usedTypeDirectiveReferences[directive] = directive;
+                }
+            }
+        }
+        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
+            if (symbolAccessibilityResult.accessibility === 0 /* Accessible */) {
+                // write the aliases
+                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
+                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
+                }
+            }
+            else {
+                // Report error
+                reportedDeclarationError = true;
+                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
+                if (errorInfo) {
+                    if (errorInfo.typeName) {
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
+                    }
+                    else {
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
+                    }
+                }
+            }
+        }
+        function trackSymbol(symbol, enclosingDeclaration, meaning) {
+            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning));
+            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
+        }
+        function reportInaccessibleThisError() {
+            if (errorNameNode) {
+                reportedDeclarationError = true;
+                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
+            }
+        }
+        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            if (type) {
+                // Write the type
+                emitType(type);
+            }
+            else {
+                errorNameNode = declaration.name;
+                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
+                errorNameNode = undefined;
+            }
+        }
+        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            if (signature.type) {
+                // Write the type
+                emitType(signature.type);
+            }
+            else {
+                errorNameNode = signature.name;
+                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
+                errorNameNode = undefined;
+            }
+        }
+        function emitLines(nodes) {
+            for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
+                var node = nodes_2[_i];
+                emit(node);
+            }
+        }
+        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
+            var currentWriterPos = writer.getTextPos();
+            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
+                var node = nodes_3[_i];
+                if (!canEmitFn || canEmitFn(node)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        write(separator);
+                    }
+                    currentWriterPos = writer.getTextPos();
+                    eachNodeEmitFn(node);
+                }
+            }
+        }
+        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
+            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
+        }
+        function writeJsDocComments(declaration) {
+            if (declaration) {
+                var jsDocComments = ts.getJsDocCommentsFromText(declaration, currentText);
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
+                // jsDoc comments are emitted at /*leading comment1 */space/*leading comment*/space
+                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, /*trailingSeparator*/ true, newLine, ts.writeCommentRange);
+            }
+        }
+        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            emitType(type);
+        }
+        function emitType(type) {
+            switch (type.kind) {
+                case 117 /* AnyKeyword */:
+                case 132 /* StringKeyword */:
+                case 130 /* NumberKeyword */:
+                case 120 /* BooleanKeyword */:
+                case 133 /* SymbolKeyword */:
+                case 103 /* VoidKeyword */:
+                case 135 /* UndefinedKeyword */:
+                case 93 /* NullKeyword */:
+                case 127 /* NeverKeyword */:
+                case 165 /* ThisType */:
+                case 166 /* StringLiteralType */:
+                    return writeTextOfNode(currentText, type);
+                case 194 /* ExpressionWithTypeArguments */:
+                    return emitExpressionWithTypeArguments(type);
+                case 155 /* TypeReference */:
+                    return emitTypeReference(type);
+                case 158 /* TypeQuery */:
+                    return emitTypeQuery(type);
+                case 160 /* ArrayType */:
+                    return emitArrayType(type);
+                case 161 /* TupleType */:
+                    return emitTupleType(type);
+                case 162 /* UnionType */:
+                    return emitUnionType(type);
+                case 163 /* IntersectionType */:
+                    return emitIntersectionType(type);
+                case 164 /* ParenthesizedType */:
+                    return emitParenType(type);
+                case 156 /* FunctionType */:
+                case 157 /* ConstructorType */:
+                    return emitSignatureDeclarationWithJsDocComments(type);
+                case 159 /* TypeLiteral */:
+                    return emitTypeLiteral(type);
+                case 69 /* Identifier */:
+                    return emitEntityName(type);
+                case 139 /* QualifiedName */:
+                    return emitEntityName(type);
+                case 154 /* TypePredicate */:
+                    return emitTypePredicate(type);
+            }
+            function writeEntityName(entityName) {
+                if (entityName.kind === 69 /* Identifier */) {
+                    writeTextOfNode(currentText, entityName);
+                }
+                else {
+                    var left = entityName.kind === 139 /* QualifiedName */ ? entityName.left : entityName.expression;
+                    var right = entityName.kind === 139 /* QualifiedName */ ? entityName.right : entityName.name;
+                    writeEntityName(left);
+                    write(".");
+                    writeTextOfNode(currentText, right);
+                }
+            }
+            function emitEntityName(entityName) {
+                var visibilityResult = resolver.isEntityNameVisible(entityName, 
+                // Aliases can be written asynchronously so use correct enclosing declaration
+                entityName.parent.kind === 229 /* ImportEqualsDeclaration */ ? entityName.parent : enclosingDeclaration);
+                handleSymbolAccessibilityError(visibilityResult);
+                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
+                writeEntityName(entityName);
+            }
+            function emitExpressionWithTypeArguments(node) {
+                if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                    ts.Debug.assert(node.expression.kind === 69 /* Identifier */ || node.expression.kind === 172 /* PropertyAccessExpression */);
+                    emitEntityName(node.expression);
+                    if (node.typeArguments) {
+                        write("<");
+                        emitCommaList(node.typeArguments, emitType);
+                        write(">");
+                    }
+                }
+            }
+            function emitTypeReference(type) {
+                emitEntityName(type.typeName);
+                if (type.typeArguments) {
+                    write("<");
+                    emitCommaList(type.typeArguments, emitType);
+                    write(">");
+                }
+            }
+            function emitTypePredicate(type) {
+                writeTextOfNode(currentText, type.parameterName);
+                write(" is ");
+                emitType(type.type);
+            }
+            function emitTypeQuery(type) {
+                write("typeof ");
+                emitEntityName(type.exprName);
+            }
+            function emitArrayType(type) {
+                emitType(type.elementType);
+                write("[]");
+            }
+            function emitTupleType(type) {
+                write("[");
+                emitCommaList(type.elementTypes, emitType);
+                write("]");
+            }
+            function emitUnionType(type) {
+                emitSeparatedList(type.types, " | ", emitType);
+            }
+            function emitIntersectionType(type) {
+                emitSeparatedList(type.types, " & ", emitType);
+            }
+            function emitParenType(type) {
+                write("(");
+                emitType(type.type);
+                write(")");
+            }
+            function emitTypeLiteral(type) {
+                write("{");
+                if (type.members.length) {
+                    writeLine();
+                    increaseIndent();
+                    // write members
+                    emitLines(type.members);
+                    decreaseIndent();
+                }
+                write("}");
+            }
+        }
+        function emitSourceFile(node) {
+            currentText = node.text;
+            currentLineMap = ts.getLineStarts(node);
+            currentIdentifiers = node.identifiers;
+            isCurrentFileExternalModule = ts.isExternalModule(node);
+            enclosingDeclaration = node;
+            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, true /* remove comments */);
+            emitLines(node.statements);
+        }
+        // Return a temp variable name to be used in `export default` statements.
+        // The temp name will be of the form _default_counter.
+        // Note that export default is only allowed at most once in a module, so we
+        // do not need to keep track of created temp names.
+        function getExportDefaultTempVariableName() {
+            var baseName = "_default";
+            if (!ts.hasProperty(currentIdentifiers, baseName)) {
+                return baseName;
+            }
+            var count = 0;
+            while (true) {
+                count++;
+                var name_23 = baseName + "_" + count;
+                if (!ts.hasProperty(currentIdentifiers, name_23)) {
+                    return name_23;
+                }
+            }
+        }
+        function emitExportAssignment(node) {
+            if (node.expression.kind === 69 /* Identifier */) {
+                write(node.isExportEquals ? "export = " : "export default ");
+                writeTextOfNode(currentText, node.expression);
+            }
+            else {
+                // Expression
+                var tempVarName = getExportDefaultTempVariableName();
+                if (!noDeclare) {
+                    write("declare ");
+                }
+                write("var ");
+                write(tempVarName);
+                write(": ");
+                writer.getSymbolAccessibilityDiagnostic = getDefaultExportAccessibilityDiagnostic;
+                resolver.writeTypeOfExpression(node.expression, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
+                write(";");
+                writeLine();
+                write(node.isExportEquals ? "export = " : "export default ");
+                write(tempVarName);
+            }
+            write(";");
+            writeLine();
+            // Make all the declarations visible for the export name
+            if (node.expression.kind === 69 /* Identifier */) {
+                var nodes = resolver.collectLinkedAliases(node.expression);
+                // write each of these declarations asynchronously
+                writeAsynchronousModuleElements(nodes);
+            }
+            function getDefaultExportAccessibilityDiagnostic(diagnostic) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
+                    errorNode: node
+                };
+            }
+        }
+        function isModuleElementVisible(node) {
+            return resolver.isDeclarationVisible(node);
+        }
+        function emitModuleElement(node, isModuleElementVisible) {
+            if (isModuleElementVisible) {
+                writeModuleElement(node);
+            }
+            else if (node.kind === 229 /* ImportEqualsDeclaration */ ||
+                (node.parent.kind === 256 /* SourceFile */ && isCurrentFileExternalModule)) {
+                var isVisible = void 0;
+                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 256 /* SourceFile */) {
+                    // Import declaration of another module that is visited async so lets put it in right spot
+                    asynchronousSubModuleDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
+                else {
+                    if (node.kind === 230 /* ImportDeclaration */) {
+                        var importDeclaration = node;
+                        if (importDeclaration.importClause) {
+                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
+                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
+                        }
+                    }
+                    moduleElementDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
+            }
+        }
+        function writeModuleElement(node) {
+            switch (node.kind) {
+                case 220 /* FunctionDeclaration */:
+                    return writeFunctionDeclaration(node);
+                case 200 /* VariableStatement */:
+                    return writeVariableStatement(node);
+                case 222 /* InterfaceDeclaration */:
+                    return writeInterfaceDeclaration(node);
+                case 221 /* ClassDeclaration */:
+                    return writeClassDeclaration(node);
+                case 223 /* TypeAliasDeclaration */:
+                    return writeTypeAliasDeclaration(node);
+                case 224 /* EnumDeclaration */:
+                    return writeEnumDeclaration(node);
+                case 225 /* ModuleDeclaration */:
+                    return writeModuleDeclaration(node);
+                case 229 /* ImportEqualsDeclaration */:
+                    return writeImportEqualsDeclaration(node);
+                case 230 /* ImportDeclaration */:
+                    return writeImportDeclaration(node);
+                default:
+                    ts.Debug.fail("Unknown symbol kind");
+            }
+        }
+        function emitModuleElementDeclarationFlags(node) {
+            // If the node is parented in the current source file we need to emit export declare or just export
+            if (node.parent.kind === 256 /* SourceFile */) {
+                // If the node is exported
+                if (node.flags & 1 /* Export */) {
+                    write("export ");
+                }
+                if (node.flags & 512 /* Default */) {
+                    write("default ");
+                }
+                else if (node.kind !== 222 /* InterfaceDeclaration */ && !noDeclare) {
+                    write("declare ");
+                }
+            }
+        }
+        function emitClassMemberDeclarationFlags(flags) {
+            if (flags & 8 /* Private */) {
+                write("private ");
+            }
+            else if (flags & 16 /* Protected */) {
+                write("protected ");
+            }
+            if (flags & 32 /* Static */) {
+                write("static ");
+            }
+            if (flags & 64 /* Readonly */) {
+                write("readonly ");
+            }
+            if (flags & 128 /* Abstract */) {
+                write("abstract ");
+            }
+        }
+        function writeImportEqualsDeclaration(node) {
+            // note usage of writer. methods instead of aliases created, just to make sure we are using
+            // correct writer especially to handle asynchronous alias writing
+            emitJsDocComments(node);
+            if (node.flags & 1 /* Export */) {
+                write("export ");
+            }
+            write("import ");
+            writeTextOfNode(currentText, node.name);
+            write(" = ");
+            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
+                write(";");
+            }
+            else {
+                write("require(");
+                emitExternalModuleSpecifier(node);
+                write(");");
+            }
+            writer.writeLine();
+            function getImportEntityNameVisibilityError(symbolAccessibilityResult) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
+                    errorNode: node,
+                    typeName: node.name
+                };
+            }
+        }
+        function isVisibleNamedBinding(namedBindings) {
+            if (namedBindings) {
+                if (namedBindings.kind === 232 /* NamespaceImport */) {
+                    return resolver.isDeclarationVisible(namedBindings);
+                }
+                else {
+                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
+                }
+            }
+        }
+        function writeImportDeclaration(node) {
+            emitJsDocComments(node);
+            if (node.flags & 1 /* Export */) {
+                write("export ");
+            }
+            write("import ");
+            if (node.importClause) {
+                var currentWriterPos = writer.getTextPos();
+                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
+                    writeTextOfNode(currentText, node.importClause.name);
+                }
+                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        // If the default binding was emitted, write the separated
+                        write(", ");
+                    }
+                    if (node.importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                        write("* as ");
+                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
+                    }
+                    else {
+                        write("{ ");
+                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
+                        write(" }");
+                    }
+                }
+                write(" from ");
+            }
+            emitExternalModuleSpecifier(node);
+            write(";");
+            writer.writeLine();
+        }
+        function emitExternalModuleSpecifier(parent) {
+            // emitExternalModuleSpecifier is usually called when we emit something in the.d.ts file that will make it an external module (i.e. import/export declarations).
+            // the only case when it is not true is when we call it to emit correct name for module augmentation - d.ts files with just module augmentations are not considered
+            // external modules since they are indistinguishable from script files with ambient modules. To fix this in such d.ts files we'll emit top level 'export {}'
+            // so compiler will treat them as external modules.
+            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 225 /* ModuleDeclaration */;
+            var moduleSpecifier;
+            if (parent.kind === 229 /* ImportEqualsDeclaration */) {
+                var node = parent;
+                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
+            }
+            else if (parent.kind === 225 /* ModuleDeclaration */) {
+                moduleSpecifier = parent.name;
+            }
+            else {
+                var node = parent;
+                moduleSpecifier = node.moduleSpecifier;
+            }
+            if (moduleSpecifier.kind === 9 /* StringLiteral */ && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
+                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
+                if (moduleName) {
+                    write('"');
+                    write(moduleName);
+                    write('"');
+                    return;
+                }
+            }
+            writeTextOfNode(currentText, moduleSpecifier);
+        }
+        function emitImportOrExportSpecifier(node) {
+            if (node.propertyName) {
+                writeTextOfNode(currentText, node.propertyName);
+                write(" as ");
+            }
+            writeTextOfNode(currentText, node.name);
+        }
+        function emitExportSpecifier(node) {
+            emitImportOrExportSpecifier(node);
+            // Make all the declarations visible for the export name
+            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
+            // write each of these declarations asynchronously
+            writeAsynchronousModuleElements(nodes);
+        }
+        function emitExportDeclaration(node) {
+            emitJsDocComments(node);
+            write("export ");
+            if (node.exportClause) {
+                write("{ ");
+                emitCommaList(node.exportClause.elements, emitExportSpecifier);
+                write(" }");
+            }
+            else {
+                write("*");
+            }
+            if (node.moduleSpecifier) {
+                write(" from ");
+                emitExternalModuleSpecifier(node);
+            }
+            write(";");
+            writer.writeLine();
+        }
+        function writeModuleDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isGlobalScopeAugmentation(node)) {
+                write("global ");
+            }
+            else {
+                if (node.flags & 4096 /* Namespace */) {
+                    write("namespace ");
+                }
+                else {
+                    write("module ");
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    emitExternalModuleSpecifier(node);
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
+                }
+            }
+            while (node.body.kind !== 226 /* ModuleBlock */) {
+                node = node.body;
+                write(".");
+                writeTextOfNode(currentText, node.name);
+            }
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.body.statements);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function writeTypeAliasDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("type ");
+            writeTextOfNode(currentText, node.name);
+            emitTypeParameters(node.typeParameters);
+            write(" = ");
+            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
+            write(";");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+            function getTypeAliasDeclarationVisibilityError(symbolAccessibilityResult) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
+                    errorNode: node.type,
+                    typeName: node.name
+                };
+            }
+        }
+        function writeEnumDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isConst(node)) {
+                write("const ");
+            }
+            write("enum ");
+            writeTextOfNode(currentText, node.name);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+        }
+        function emitEnumMemberDeclaration(node) {
+            emitJsDocComments(node);
+            writeTextOfNode(currentText, node.name);
+            var enumMemberValue = resolver.getConstantValue(node);
+            if (enumMemberValue !== undefined) {
+                write(" = ");
+                write(enumMemberValue.toString());
+            }
+            write(",");
+            writeLine();
+        }
+        function isPrivateMethodTypeParameter(node) {
+            return node.parent.kind === 147 /* MethodDeclaration */ && (node.parent.flags & 8 /* Private */);
+        }
+        function emitTypeParameters(typeParameters) {
+            function emitTypeParameter(node) {
+                increaseIndent();
+                emitJsDocComments(node);
+                decreaseIndent();
+                writeTextOfNode(currentText, node.name);
+                // If there is constraint present and this is not a type parameter of the private method emit the constraint
+                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
+                    write(" extends ");
+                    if (node.parent.kind === 156 /* FunctionType */ ||
+                        node.parent.kind === 157 /* ConstructorType */ ||
+                        (node.parent.parent && node.parent.parent.kind === 159 /* TypeLiteral */)) {
+                        ts.Debug.assert(node.parent.kind === 147 /* MethodDeclaration */ ||
+                            node.parent.kind === 146 /* MethodSignature */ ||
+                            node.parent.kind === 156 /* FunctionType */ ||
+                            node.parent.kind === 157 /* ConstructorType */ ||
+                            node.parent.kind === 151 /* CallSignature */ ||
+                            node.parent.kind === 152 /* ConstructSignature */);
+                        emitType(node.constraint);
+                    }
+                    else {
+                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
+                    }
+                }
+                function getTypeParameterConstraintVisibilityError(symbolAccessibilityResult) {
+                    // Type parameter constraints are named by user so we should always be able to name it
+                    var diagnosticMessage;
+                    switch (node.parent.kind) {
+                        case 221 /* ClassDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
+                            break;
+                        case 222 /* InterfaceDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 152 /* ConstructSignature */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 151 /* CallSignature */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 147 /* MethodDeclaration */:
+                        case 146 /* MethodSignature */:
+                            if (node.parent.flags & 32 /* Static */) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                            }
+                            break;
+                        case 220 /* FunctionDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                            break;
+                        default:
+                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: node.name
+                    };
+                }
+            }
+            if (typeParameters) {
+                write("<");
+                emitCommaList(typeParameters, emitTypeParameter);
+                write(">");
+            }
+        }
+        function emitHeritageClause(typeReferences, isImplementsList) {
+            if (typeReferences) {
+                write(isImplementsList ? " implements " : " extends ");
+                emitCommaList(typeReferences, emitTypeOfTypeReference);
+            }
+            function emitTypeOfTypeReference(node) {
+                if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
+                }
+                else if (!isImplementsList && node.expression.kind === 93 /* NullKeyword */) {
+                    write("null");
+                }
+                else {
+                    writer.getSymbolAccessibilityDiagnostic = getHeritageClauseVisibilityError;
+                    resolver.writeBaseConstructorTypeOfClass(enclosingDeclaration, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
+                }
+                function getHeritageClauseVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage;
+                    // Heritage clause is written by user so it can always be named
+                    if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
+                        // Class or Interface implemented/extended is inaccessible
+                        diagnosticMessage = isImplementsList ?
+                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
+                            ts.Diagnostics.Extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        // interface is inaccessible
+                        diagnosticMessage = ts.Diagnostics.Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: node.parent.parent.name
+                    };
+                }
+            }
+        }
+        function writeClassDeclaration(node) {
+            function emitParameterProperties(constructorDeclaration) {
+                if (constructorDeclaration) {
+                    ts.forEach(constructorDeclaration.parameters, function (param) {
+                        if (param.flags & 92 /* ParameterPropertyModifier */) {
+                            emitPropertyDeclaration(param);
+                        }
+                    });
+                }
+            }
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (node.flags & 128 /* Abstract */) {
+                write("abstract ");
+            }
+            write("class ");
+            writeTextOfNode(currentText, node.name);
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitTypeParameters(node.typeParameters);
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            if (baseTypeNode) {
+                emitHeritageClause([baseTypeNode], /*isImplementsList*/ false);
+            }
+            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), /*isImplementsList*/ true);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitParameterProperties(ts.getFirstConstructorWithBody(node));
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function writeInterfaceDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("interface ");
+            writeTextOfNode(currentText, node.name);
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitTypeParameters(node.typeParameters);
+            emitHeritageClause(ts.getInterfaceBaseTypeNodes(node), /*isImplementsList*/ false);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function emitPropertyDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            emitJsDocComments(node);
+            emitClassMemberDeclarationFlags(node.flags);
+            emitVariableDeclaration(node);
+            write(";");
+            writeLine();
+        }
+        function emitVariableDeclaration(node) {
+            // If we are emitting property it isn't moduleElement and hence we already know it needs to be emitted
+            // so there is no check needed to see if declaration is visible
+            if (node.kind !== 218 /* VariableDeclaration */ || resolver.isDeclarationVisible(node)) {
+                if (ts.isBindingPattern(node.name)) {
+                    emitBindingPattern(node.name);
+                }
+                else {
+                    // If this node is a computed name, it can only be a symbol, because we've already skipped
+                    // it if it's not a well known symbol. In that case, the text of the name will be exactly
+                    // what we want, namely the name expression enclosed in brackets.
+                    writeTextOfNode(currentText, node.name);
+                    // If optional property emit ?
+                    if ((node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */ || node.kind === 142 /* Parameter */) && ts.hasQuestionToken(node)) {
+                        write("?");
+                    }
+                    if ((node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */) && node.parent.kind === 159 /* TypeLiteral */) {
+                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
+                    }
+                    else if (!(node.flags & 8 /* Private */)) {
+                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
+                    }
+                }
+            }
+            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                if (node.kind === 218 /* VariableDeclaration */) {
+                    return symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
+                }
+                else if (node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */) {
+                    // TODO(jfreeman): Deal with computed properties in error reporting.
+                    if (node.flags & 32 /* Static */) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else if (node.parent.kind === 221 /* ClassDeclaration */) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        // Interfaces cannot have types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
+                    }
+                }
+            }
+            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
+            }
+            function emitBindingPattern(bindingPattern) {
+                // Only select non-omitted expression from the bindingPattern's elements.
+                // We have to do this to avoid emitting trailing commas.
+                // For example:
+                //      original: var [, c,,] = [ 2,3,4]
+                //      emitted: declare var c: number; // instead of declare var c:number, ;
+                var elements = [];
+                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (element.kind !== 193 /* OmittedExpression */) {
+                        elements.push(element);
+                    }
+                }
+                emitCommaList(elements, emitBindingElement);
+            }
+            function emitBindingElement(bindingElement) {
+                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                    return diagnosticMessage !== undefined ? {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: bindingElement,
+                        typeName: bindingElement.name
+                    } : undefined;
+                }
+                if (bindingElement.name) {
+                    if (ts.isBindingPattern(bindingElement.name)) {
+                        emitBindingPattern(bindingElement.name);
+                    }
+                    else {
+                        writeTextOfNode(currentText, bindingElement.name);
+                        writeTypeOfDeclaration(bindingElement, /*type*/ undefined, getBindingElementTypeVisibilityError);
+                    }
+                }
+            }
+        }
+        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
+            // if this is property of type literal,
+            // or is parameter of method/call/construct/index signature of type literal
+            // emit only if type is specified
+            if (node.type) {
+                write(": ");
+                emitType(node.type);
+            }
+        }
+        function isVariableStatementVisible(node) {
+            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
+        }
+        function writeVariableStatement(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isLet(node.declarationList)) {
+                write("let ");
+            }
+            else if (ts.isConst(node.declarationList)) {
+                write("const ");
+            }
+            else {
+                write("var ");
+            }
+            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
+            write(";");
+            writeLine();
+        }
+        function emitAccessorDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+            var accessorWithTypeAnnotation;
+            if (node === accessors.firstAccessor) {
+                emitJsDocComments(accessors.getAccessor);
+                emitJsDocComments(accessors.setAccessor);
+                emitClassMemberDeclarationFlags(node.flags | (accessors.setAccessor ? 0 : 64 /* Readonly */));
+                writeTextOfNode(currentText, node.name);
+                if (!(node.flags & 8 /* Private */)) {
+                    accessorWithTypeAnnotation = node;
+                    var type = getTypeAnnotationFromAccessor(node);
+                    if (!type) {
+                        // couldn't get type for the first accessor, try the another one
+                        var anotherAccessor = node.kind === 149 /* GetAccessor */ ? accessors.setAccessor : accessors.getAccessor;
+                        type = getTypeAnnotationFromAccessor(anotherAccessor);
+                        if (type) {
+                            accessorWithTypeAnnotation = anotherAccessor;
+                        }
+                    }
+                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
+                }
+                write(";");
+                writeLine();
+            }
+            function getTypeAnnotationFromAccessor(accessor) {
+                if (accessor) {
+                    return accessor.kind === 149 /* GetAccessor */
+                        ? accessor.type // Getter - return type
+                        : accessor.parameters.length > 0
+                            ? accessor.parameters[0].type // Setter parameter type
+                            : undefined;
+                }
+            }
+            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                if (accessorWithTypeAnnotation.kind === 150 /* SetAccessor */) {
+                    // Setters have to have type named and cannot infer it so, the type should always be named
+                    if (accessorWithTypeAnnotation.parent.flags & 32 /* Static */) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.parameters[0],
+                        // TODO(jfreeman): Investigate why we are passing node.name instead of node.parameters[0].name
+                        typeName: accessorWithTypeAnnotation.name
+                    };
+                }
+                else {
+                    if (accessorWithTypeAnnotation.flags & 32 /* Static */) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.name,
+                        typeName: undefined
+                    };
+                }
+            }
+        }
+        function writeFunctionDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            // If we are emitting Method/Constructor it isn't moduleElement and hence already determined to be emitting
+            // so no need to verify if the declaration is visible
+            if (!resolver.isImplementationOfOverload(node)) {
+                emitJsDocComments(node);
+                if (node.kind === 220 /* FunctionDeclaration */) {
+                    emitModuleElementDeclarationFlags(node);
+                }
+                else if (node.kind === 147 /* MethodDeclaration */ || node.kind === 148 /* Constructor */) {
+                    emitClassMemberDeclarationFlags(node.flags);
+                }
+                if (node.kind === 220 /* FunctionDeclaration */) {
+                    write("function ");
+                    writeTextOfNode(currentText, node.name);
+                }
+                else if (node.kind === 148 /* Constructor */) {
+                    write("constructor");
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
+                    if (ts.hasQuestionToken(node)) {
+                        write("?");
+                    }
+                }
+                emitSignatureDeclaration(node);
+            }
+        }
+        function emitSignatureDeclarationWithJsDocComments(node) {
+            emitJsDocComments(node);
+            emitSignatureDeclaration(node);
+        }
+        function emitSignatureDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            var closeParenthesizedFunctionType = false;
+            if (node.kind === 153 /* IndexSignature */) {
+                // Index signature can have readonly modifier
+                emitClassMemberDeclarationFlags(node.flags);
+                write("[");
+            }
+            else {
+                // Construct signature or constructor type write new Signature
+                if (node.kind === 152 /* ConstructSignature */ || node.kind === 157 /* ConstructorType */) {
+                    write("new ");
+                }
+                else if (node.kind === 156 /* FunctionType */) {
+                    var currentOutput = writer.getText();
+                    // Do not generate incorrect type when function type with type parameters is type argument
+                    // This could happen if user used space between two '<' making it error free
+                    // e.g var x: A< <Tany>(a: Tany)=>Tany>;
+                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
+                        closeParenthesizedFunctionType = true;
+                        write("(");
+                    }
+                }
+                emitTypeParameters(node.typeParameters);
+                write("(");
+            }
+            // Parameters
+            emitCommaList(node.parameters, emitParameterDeclaration);
+            if (node.kind === 153 /* IndexSignature */) {
+                write("]");
+            }
+            else {
+                write(")");
+            }
+            // If this is not a constructor and is not private, emit the return type
+            var isFunctionTypeOrConstructorType = node.kind === 156 /* FunctionType */ || node.kind === 157 /* ConstructorType */;
+            if (isFunctionTypeOrConstructorType || node.parent.kind === 159 /* TypeLiteral */) {
+                // Emit type literal signature return type only if specified
+                if (node.type) {
+                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
+                    emitType(node.type);
+                }
+            }
+            else if (node.kind !== 148 /* Constructor */ && !(node.flags & 8 /* Private */)) {
+                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
+            }
+            enclosingDeclaration = prevEnclosingDeclaration;
+            if (!isFunctionTypeOrConstructorType) {
+                write(";");
+                writeLine();
+            }
+            else if (closeParenthesizedFunctionType) {
+                write(")");
+            }
+            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                switch (node.kind) {
+                    case 152 /* ConstructSignature */:
+                        // Interfaces cannot have return types that cannot be named
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 151 /* CallSignature */:
+                        // Interfaces cannot have return types that cannot be named
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 153 /* IndexSignature */:
+                        // Interfaces cannot have return types that cannot be named
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        if (node.flags & 32 /* Static */) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else {
+                            // Interfaces cannot have return types that cannot be named
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
+                        }
+                        break;
+                    case 220 /* FunctionDeclaration */:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
+                        break;
+                    default:
+                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
+                }
+                return {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node.name || node
+                };
+            }
+        }
+        function emitParameterDeclaration(node) {
+            increaseIndent();
+            emitJsDocComments(node);
+            if (node.dotDotDotToken) {
+                write("...");
+            }
+            if (ts.isBindingPattern(node.name)) {
+                // For bindingPattern, we can't simply writeTextOfNode from the source file
+                // because we want to omit the initializer and using writeTextOfNode will result in initializer get emitted.
+                // Therefore, we will have to recursively emit each element in the bindingPattern.
+                emitBindingPattern(node.name);
+            }
+            else {
+                writeTextOfNode(currentText, node.name);
+            }
+            if (resolver.isOptionalParameter(node)) {
+                write("?");
+            }
+            decreaseIndent();
+            if (node.parent.kind === 156 /* FunctionType */ ||
+                node.parent.kind === 157 /* ConstructorType */ ||
+                node.parent.parent.kind === 159 /* TypeLiteral */) {
+                emitTypeOfVariableDeclarationFromTypeLiteral(node);
+            }
+            else if (!(node.parent.flags & 8 /* Private */)) {
+                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
+            }
+            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
+            }
+            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                switch (node.parent.kind) {
+                    case 148 /* Constructor */:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
+                    case 152 /* ConstructSignature */:
+                        // Interfaces cannot have parameter types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 151 /* CallSignature */:
+                        // Interfaces cannot have parameter types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        if (node.parent.flags & 32 /* Static */) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else {
+                            // Interfaces cannot have parameter types that cannot be named
+                            return symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                        }
+                    case 220 /* FunctionDeclaration */:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                    default:
+                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
+                }
+            }
+            function emitBindingPattern(bindingPattern) {
+                // We have to explicitly emit square bracket and bracket because these tokens are not store inside the node.
+                if (bindingPattern.kind === 167 /* ObjectBindingPattern */) {
+                    write("{");
+                    emitCommaList(bindingPattern.elements, emitBindingElement);
+                    write("}");
+                }
+                else if (bindingPattern.kind === 168 /* ArrayBindingPattern */) {
+                    write("[");
+                    var elements = bindingPattern.elements;
+                    emitCommaList(elements, emitBindingElement);
+                    if (elements && elements.hasTrailingComma) {
+                        write(", ");
+                    }
+                    write("]");
+                }
+            }
+            function emitBindingElement(bindingElement) {
+                if (bindingElement.kind === 193 /* OmittedExpression */) {
+                    // If bindingElement is an omittedExpression (i.e. containing elision),
+                    // we will emit blank space (although this may differ from users' original code,
+                    // it allows emitSeparatedList to write separator appropriately)
+                    // Example:
+                    //      original: function foo([, x, ,]) {}
+                    //      emit    : function foo([ , x,  , ]) {}
+                    write(" ");
+                }
+                else if (bindingElement.kind === 169 /* BindingElement */) {
+                    if (bindingElement.propertyName) {
+                        // bindingElement has propertyName property in the following case:
+                        //      { y: [a,b,c] ...} -> bindingPattern will have a property called propertyName for "y"
+                        // We have to explicitly emit the propertyName before descending into its binding elements.
+                        // Example:
+                        //      original: function foo({y: [a,b,c]}) {}
+                        //      emit    : declare function foo({y: [a, b, c]}: { y: [any, any, any] }) void;
+                        writeTextOfNode(currentText, bindingElement.propertyName);
+                        write(": ");
+                    }
+                    if (bindingElement.name) {
+                        if (ts.isBindingPattern(bindingElement.name)) {
+                            // If it is a nested binding pattern, we will recursively descend into each element and emit each one separately.
+                            // In the case of rest element, we will omit rest element.
+                            // Example:
+                            //      original: function foo([a, [[b]], c] = [1,[["string"]], 3]) {}
+                            //      emit    : declare function foo([a, [[b]], c]: [number, [[string]], number]): void;
+                            //      original with rest: function foo([a, ...c]) {}
+                            //      emit              : declare function foo([a, ...c]): void;
+                            emitBindingPattern(bindingElement.name);
+                        }
+                        else {
+                            ts.Debug.assert(bindingElement.name.kind === 69 /* Identifier */);
+                            // If the node is just an identifier, we will simply emit the text associated with the node's name
+                            // Example:
+                            //      original: function foo({y = 10, x}) {}
+                            //      emit    : declare function foo({y, x}: {number, any}): void;
+                            if (bindingElement.dotDotDotToken) {
+                                write("...");
+                            }
+                            writeTextOfNode(currentText, bindingElement.name);
+                        }
+                    }
+                }
+            }
+        }
+        function emitNode(node) {
+            switch (node.kind) {
+                case 220 /* FunctionDeclaration */:
+                case 225 /* ModuleDeclaration */:
+                case 229 /* ImportEqualsDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 221 /* ClassDeclaration */:
+                case 223 /* TypeAliasDeclaration */:
+                case 224 /* EnumDeclaration */:
+                    return emitModuleElement(node, isModuleElementVisible(node));
+                case 200 /* VariableStatement */:
+                    return emitModuleElement(node, isVariableStatementVisible(node));
+                case 230 /* ImportDeclaration */:
+                    // Import declaration without import clause is visible, otherwise it is not visible
+                    return emitModuleElement(node, /*isModuleElementVisible*/ !node.importClause);
+                case 236 /* ExportDeclaration */:
+                    return emitExportDeclaration(node);
+                case 148 /* Constructor */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                    return writeFunctionDeclaration(node);
+                case 152 /* ConstructSignature */:
+                case 151 /* CallSignature */:
+                case 153 /* IndexSignature */:
+                    return emitSignatureDeclarationWithJsDocComments(node);
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                    return emitAccessorDeclaration(node);
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                    return emitPropertyDeclaration(node);
+                case 255 /* EnumMember */:
+                    return emitEnumMemberDeclaration(node);
+                case 235 /* ExportAssignment */:
+                    return emitExportAssignment(node);
+                case 256 /* SourceFile */:
+                    return emitSourceFile(node);
+            }
+        }
+        /**
+         * Adds the reference to referenced file, returns true if global file reference was emitted
+         * @param referencedFile
+         * @param addBundledFileReference Determines if global file reference corresponding to bundled file should be emitted or not
+         */
+        function writeReferencePath(referencedFile, addBundledFileReference) {
+            var declFileName;
+            var addedBundledEmitReference = false;
+            if (ts.isDeclarationFile(referencedFile)) {
+                // Declaration file, use declaration file name
+                declFileName = referencedFile.fileName;
+            }
+            else {
+                // Get the declaration file path
+                ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile);
+            }
+            if (declFileName) {
+                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
+                /*isAbsolutePathAnUrl*/ false);
+                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
+            }
+            return addedBundledEmitReference;
+            function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) {
+                // Dont add reference path to this file if it is a bundled emit and caller asked not emit bundled file path
+                if (isBundledEmit && !addBundledFileReference) {
+                    return;
+                }
+                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
+                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
+                addedBundledEmitReference = isBundledEmit;
+            }
+        }
+    }
+    /* @internal */
+    function writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) {
+        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit);
+        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
+        if (!emitSkipped) {
+            var declarationOutput = emitDeclarationResult.referencesOutput
+                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
+            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
+        }
+        return emitSkipped;
+        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
+            var appliedSyncOutputPos = 0;
+            var declarationOutput = "";
+            // apply asynchronous additions to the synchronous output
+            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                if (aliasEmitInfo.asynchronousOutput) {
+                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
+                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
+                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
+                }
+            });
+            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
+            return declarationOutput;
+        }
+    }
+    ts.writeDeclarationFile = writeDeclarationFile;
+})(ts || (ts = {}));
+/// <reference path="checker.ts"/>
+/// <reference path="sourcemap.ts" />
+/// <reference path="declarationEmitter.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    function getResolvedExternalModuleName(host, file) {
+        return file.moduleName || ts.getExternalModuleNameFromPath(host, file.fileName);
+    }
+    ts.getResolvedExternalModuleName = getResolvedExternalModuleName;
+    function getExternalModuleNameFromDeclaration(host, resolver, declaration) {
+        var file = resolver.getExternalModuleFileFromDeclaration(declaration);
+        if (!file || ts.isDeclarationFile(file)) {
+            return undefined;
+        }
+        return getResolvedExternalModuleName(host, file);
+    }
+    ts.getExternalModuleNameFromDeclaration = getExternalModuleNameFromDeclaration;
+    var Jump;
+    (function (Jump) {
+        Jump[Jump["Break"] = 2] = "Break";
+        Jump[Jump["Continue"] = 4] = "Continue";
+        Jump[Jump["Return"] = 8] = "Return";
+    })(Jump || (Jump = {}));
+    var entities = {
+        "quot": 0x0022,
+        "amp": 0x0026,
+        "apos": 0x0027,
+        "lt": 0x003C,
+        "gt": 0x003E,
+        "nbsp": 0x00A0,
+        "iexcl": 0x00A1,
+        "cent": 0x00A2,
+        "pound": 0x00A3,
+        "curren": 0x00A4,
+        "yen": 0x00A5,
+        "brvbar": 0x00A6,
+        "sect": 0x00A7,
+        "uml": 0x00A8,
+        "copy": 0x00A9,
+        "ordf": 0x00AA,
+        "laquo": 0x00AB,
+        "not": 0x00AC,
+        "shy": 0x00AD,
+        "reg": 0x00AE,
+        "macr": 0x00AF,
+        "deg": 0x00B0,
+        "plusmn": 0x00B1,
+        "sup2": 0x00B2,
+        "sup3": 0x00B3,
+        "acute": 0x00B4,
+        "micro": 0x00B5,
+        "para": 0x00B6,
+        "middot": 0x00B7,
+        "cedil": 0x00B8,
+        "sup1": 0x00B9,
+        "ordm": 0x00BA,
+        "raquo": 0x00BB,
+        "frac14": 0x00BC,
+        "frac12": 0x00BD,
+        "frac34": 0x00BE,
+        "iquest": 0x00BF,
+        "Agrave": 0x00C0,
+        "Aacute": 0x00C1,
+        "Acirc": 0x00C2,
+        "Atilde": 0x00C3,
+        "Auml": 0x00C4,
+        "Aring": 0x00C5,
+        "AElig": 0x00C6,
+        "Ccedil": 0x00C7,
+        "Egrave": 0x00C8,
+        "Eacute": 0x00C9,
+        "Ecirc": 0x00CA,
+        "Euml": 0x00CB,
+        "Igrave": 0x00CC,
+        "Iacute": 0x00CD,
+        "Icirc": 0x00CE,
+        "Iuml": 0x00CF,
+        "ETH": 0x00D0,
+        "Ntilde": 0x00D1,
+        "Ograve": 0x00D2,
+        "Oacute": 0x00D3,
+        "Ocirc": 0x00D4,
+        "Otilde": 0x00D5,
+        "Ouml": 0x00D6,
+        "times": 0x00D7,
+        "Oslash": 0x00D8,
+        "Ugrave": 0x00D9,
+        "Uacute": 0x00DA,
+        "Ucirc": 0x00DB,
+        "Uuml": 0x00DC,
+        "Yacute": 0x00DD,
+        "THORN": 0x00DE,
+        "szlig": 0x00DF,
+        "agrave": 0x00E0,
+        "aacute": 0x00E1,
+        "acirc": 0x00E2,
+        "atilde": 0x00E3,
+        "auml": 0x00E4,
+        "aring": 0x00E5,
+        "aelig": 0x00E6,
+        "ccedil": 0x00E7,
+        "egrave": 0x00E8,
+        "eacute": 0x00E9,
+        "ecirc": 0x00EA,
+        "euml": 0x00EB,
+        "igrave": 0x00EC,
+        "iacute": 0x00ED,
+        "icirc": 0x00EE,
+        "iuml": 0x00EF,
+        "eth": 0x00F0,
+        "ntilde": 0x00F1,
+        "ograve": 0x00F2,
+        "oacute": 0x00F3,
+        "ocirc": 0x00F4,
+        "otilde": 0x00F5,
+        "ouml": 0x00F6,
+        "divide": 0x00F7,
+        "oslash": 0x00F8,
+        "ugrave": 0x00F9,
+        "uacute": 0x00FA,
+        "ucirc": 0x00FB,
+        "uuml": 0x00FC,
+        "yacute": 0x00FD,
+        "thorn": 0x00FE,
+        "yuml": 0x00FF,
+        "OElig": 0x0152,
+        "oelig": 0x0153,
+        "Scaron": 0x0160,
+        "scaron": 0x0161,
+        "Yuml": 0x0178,
+        "fnof": 0x0192,
+        "circ": 0x02C6,
+        "tilde": 0x02DC,
+        "Alpha": 0x0391,
+        "Beta": 0x0392,
+        "Gamma": 0x0393,
+        "Delta": 0x0394,
+        "Epsilon": 0x0395,
+        "Zeta": 0x0396,
+        "Eta": 0x0397,
+        "Theta": 0x0398,
+        "Iota": 0x0399,
+        "Kappa": 0x039A,
+        "Lambda": 0x039B,
+        "Mu": 0x039C,
+        "Nu": 0x039D,
+        "Xi": 0x039E,
+        "Omicron": 0x039F,
+        "Pi": 0x03A0,
+        "Rho": 0x03A1,
+        "Sigma": 0x03A3,
+        "Tau": 0x03A4,
+        "Upsilon": 0x03A5,
+        "Phi": 0x03A6,
+        "Chi": 0x03A7,
+        "Psi": 0x03A8,
+        "Omega": 0x03A9,
+        "alpha": 0x03B1,
+        "beta": 0x03B2,
+        "gamma": 0x03B3,
+        "delta": 0x03B4,
+        "epsilon": 0x03B5,
+        "zeta": 0x03B6,
+        "eta": 0x03B7,
+        "theta": 0x03B8,
+        "iota": 0x03B9,
+        "kappa": 0x03BA,
+        "lambda": 0x03BB,
+        "mu": 0x03BC,
+        "nu": 0x03BD,
+        "xi": 0x03BE,
+        "omicron": 0x03BF,
+        "pi": 0x03C0,
+        "rho": 0x03C1,
+        "sigmaf": 0x03C2,
+        "sigma": 0x03C3,
+        "tau": 0x03C4,
+        "upsilon": 0x03C5,
+        "phi": 0x03C6,
+        "chi": 0x03C7,
+        "psi": 0x03C8,
+        "omega": 0x03C9,
+        "thetasym": 0x03D1,
+        "upsih": 0x03D2,
+        "piv": 0x03D6,
+        "ensp": 0x2002,
+        "emsp": 0x2003,
+        "thinsp": 0x2009,
+        "zwnj": 0x200C,
+        "zwj": 0x200D,
+        "lrm": 0x200E,
+        "rlm": 0x200F,
+        "ndash": 0x2013,
+        "mdash": 0x2014,
+        "lsquo": 0x2018,
+        "rsquo": 0x2019,
+        "sbquo": 0x201A,
+        "ldquo": 0x201C,
+        "rdquo": 0x201D,
+        "bdquo": 0x201E,
+        "dagger": 0x2020,
+        "Dagger": 0x2021,
+        "bull": 0x2022,
+        "hellip": 0x2026,
+        "permil": 0x2030,
+        "prime": 0x2032,
+        "Prime": 0x2033,
+        "lsaquo": 0x2039,
+        "rsaquo": 0x203A,
+        "oline": 0x203E,
+        "frasl": 0x2044,
+        "euro": 0x20AC,
+        "image": 0x2111,
+        "weierp": 0x2118,
+        "real": 0x211C,
+        "trade": 0x2122,
+        "alefsym": 0x2135,
+        "larr": 0x2190,
+        "uarr": 0x2191,
+        "rarr": 0x2192,
+        "darr": 0x2193,
+        "harr": 0x2194,
+        "crarr": 0x21B5,
+        "lArr": 0x21D0,
+        "uArr": 0x21D1,
+        "rArr": 0x21D2,
+        "dArr": 0x21D3,
+        "hArr": 0x21D4,
+        "forall": 0x2200,
+        "part": 0x2202,
+        "exist": 0x2203,
+        "empty": 0x2205,
+        "nabla": 0x2207,
+        "isin": 0x2208,
+        "notin": 0x2209,
+        "ni": 0x220B,
+        "prod": 0x220F,
+        "sum": 0x2211,
+        "minus": 0x2212,
+        "lowast": 0x2217,
+        "radic": 0x221A,
+        "prop": 0x221D,
+        "infin": 0x221E,
+        "ang": 0x2220,
+        "and": 0x2227,
+        "or": 0x2228,
+        "cap": 0x2229,
+        "cup": 0x222A,
+        "int": 0x222B,
+        "there4": 0x2234,
+        "sim": 0x223C,
+        "cong": 0x2245,
+        "asymp": 0x2248,
+        "ne": 0x2260,
+        "equiv": 0x2261,
+        "le": 0x2264,
+        "ge": 0x2265,
+        "sub": 0x2282,
+        "sup": 0x2283,
+        "nsub": 0x2284,
+        "sube": 0x2286,
+        "supe": 0x2287,
+        "oplus": 0x2295,
+        "otimes": 0x2297,
+        "perp": 0x22A5,
+        "sdot": 0x22C5,
+        "lceil": 0x2308,
+        "rceil": 0x2309,
+        "lfloor": 0x230A,
+        "rfloor": 0x230B,
+        "lang": 0x2329,
+        "rang": 0x232A,
+        "loz": 0x25CA,
+        "spades": 0x2660,
+        "clubs": 0x2663,
+        "hearts": 0x2665,
+        "diams": 0x2666
+    };
+    // Flags enum to track count of temp variables and a few dedicated names
+    var TempFlags;
+    (function (TempFlags) {
+        TempFlags[TempFlags["Auto"] = 0] = "Auto";
+        TempFlags[TempFlags["CountMask"] = 268435455] = "CountMask";
+        TempFlags[TempFlags["_i"] = 268435456] = "_i";
+    })(TempFlags || (TempFlags = {}));
+    var CopyDirection;
+    (function (CopyDirection) {
+        CopyDirection[CopyDirection["ToOriginal"] = 0] = "ToOriginal";
+        CopyDirection[CopyDirection["ToOutParameter"] = 1] = "ToOutParameter";
+    })(CopyDirection || (CopyDirection = {}));
+    // targetSourceFile is when users only want one file in entire project to be emitted. This is used in compileOnSave feature
+    function emitFiles(resolver, host, targetSourceFile) {
+        // emit output for the __extends helper function
+        var extendsHelper = "\nvar __extends = (this && this.__extends) || function (d, b) {\n    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n    function __() { this.constructor = d; }\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n};";
+        var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n    for (var s, i = 1, n = arguments.length; i < n; i++) {\n        s = arguments[i];\n        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n            t[p] = s[p];\n    }\n    return t;\n};";
+        // emit output for the __decorate helper function
+        var decorateHelper = "\nvar __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\n};";
+        // emit output for the __metadata helper function
+        var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};";
+        // emit output for the __param helper function
+        var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n    return function (target, key) { decorator(target, key, paramIndex); }\n};";
+        var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n    return new (P || (P = Promise))(function (resolve, reject) {\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n        step((generator = generator.apply(thisArg, _arguments)).next());\n    });\n};";
+        var compilerOptions = host.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var modulekind = ts.getEmitModuleKind(compilerOptions);
+        var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
+        var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined;
+        var emitterDiagnostics = ts.createDiagnosticCollection();
+        var emitSkipped = false;
+        var newLine = host.getNewLine();
+        var emitJavaScript = createFileEmitter();
+        ts.forEachExpectedEmitFile(host, emitFile, targetSourceFile);
+        return {
+            emitSkipped: emitSkipped,
+            diagnostics: emitterDiagnostics.getDiagnostics(),
+            emittedFiles: emittedFilesList,
+            sourceMaps: sourceMapDataList
+        };
+        function isUniqueLocalName(name, container) {
+            for (var node = container; ts.isNodeDescendentOf(node, container); node = node.nextContainer) {
+                if (node.locals && ts.hasProperty(node.locals, name)) {
+                    // We conservatively include alias symbols to cover cases where they're emitted as locals
+                    if (node.locals[name].flags & (107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function setLabeledJump(state, isBreak, labelText, labelMarker) {
+            if (isBreak) {
+                if (!state.labeledNonLocalBreaks) {
+                    state.labeledNonLocalBreaks = {};
+                }
+                state.labeledNonLocalBreaks[labelText] = labelMarker;
+            }
+            else {
+                if (!state.labeledNonLocalContinues) {
+                    state.labeledNonLocalContinues = {};
+                }
+                state.labeledNonLocalContinues[labelText] = labelMarker;
+            }
+        }
+        function hoistVariableDeclarationFromLoop(state, declaration) {
+            if (!state.hoistedLocalVariables) {
+                state.hoistedLocalVariables = [];
+            }
+            visit(declaration.name);
+            function visit(node) {
+                if (node.kind === 69 /* Identifier */) {
+                    state.hoistedLocalVariables.push(node);
+                }
+                else {
+                    for (var _a = 0, _b = node.elements; _a < _b.length; _a++) {
+                        var element = _b[_a];
+                        visit(element.name);
+                    }
+                }
+            }
+        }
+        function createFileEmitter() {
+            var writer = ts.createTextWriter(newLine);
+            var write = writer.write, writeTextOfNode = writer.writeTextOfNode, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent;
+            var sourceMap = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? ts.createSourceMapWriter(host, writer) : ts.getNullSourceMapWriter();
+            var setSourceFile = sourceMap.setSourceFile, emitStart = sourceMap.emitStart, emitEnd = sourceMap.emitEnd, emitPos = sourceMap.emitPos;
+            var currentSourceFile;
+            var currentText;
+            var currentLineMap;
+            var currentFileIdentifiers;
+            var renamedDependencies;
+            var isEs6Module;
+            var isCurrentFileExternalModule;
+            // name of an exporter function if file is a System external module
+            // System.register([...], function (<exporter>) {...})
+            // exporting in System modules looks like:
+            // export var x; ... x = 1
+            // =>
+            // var x;... exporter("x", x = 1)
+            var exportFunctionForFile;
+            var contextObjectForFile;
+            var generatedNameSet;
+            var nodeToGeneratedName;
+            var computedPropertyNamesToGeneratedNames;
+            var decoratedClassAliases;
+            var convertedLoopState;
+            var extendsEmitted;
+            var assignEmitted;
+            var decorateEmitted;
+            var paramEmitted;
+            var awaiterEmitted;
+            var tempFlags = 0;
+            var tempVariables;
+            var tempParameters;
+            var externalImports;
+            var exportSpecifiers;
+            var exportEquals;
+            var hasExportStarsToExportValues;
+            var detachedCommentsInfo;
+            /** Sourcemap data that will get encoded */
+            var sourceMapData;
+            /** Is the file being emitted into its own file */
+            var isOwnFileEmit;
+            /** If removeComments is true, no leading-comments needed to be emitted **/
+            var emitLeadingCommentsOfPosition = compilerOptions.removeComments ? function (pos) { } : emitLeadingCommentsOfPositionWorker;
+            var setSourceMapWriterEmit = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? changeSourceMapEmit : function (writer) { };
+            var moduleEmitDelegates = (_a = {},
+                _a[ts.ModuleKind.ES6] = emitES6Module,
+                _a[ts.ModuleKind.AMD] = emitAMDModule,
+                _a[ts.ModuleKind.System] = emitSystemModule,
+                _a[ts.ModuleKind.UMD] = emitUMDModule,
+                _a[ts.ModuleKind.CommonJS] = emitCommonJSModule,
+                _a
+            );
+            var bundleEmitDelegates = (_b = {},
+                _b[ts.ModuleKind.ES6] = function () { },
+                _b[ts.ModuleKind.AMD] = emitAMDModule,
+                _b[ts.ModuleKind.System] = emitSystemModule,
+                _b[ts.ModuleKind.UMD] = function () { },
+                _b[ts.ModuleKind.CommonJS] = function () { },
+                _b
+            );
+            return doEmit;
+            function doEmit(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
+                sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
+                generatedNameSet = {};
+                nodeToGeneratedName = [];
+                decoratedClassAliases = [];
+                isOwnFileEmit = !isBundledEmit;
+                // Emit helpers from all the files
+                if (isBundledEmit && modulekind) {
+                    ts.forEach(sourceFiles, emitEmitHelpers);
+                }
+                // Do not call emit directly. It does not set the currentSourceFile.
+                ts.forEach(sourceFiles, emitSourceFile);
+                writeLine();
+                var sourceMappingURL = sourceMap.getSourceMappingURL();
+                if (sourceMappingURL) {
+                    write("//# sourceMappingURL=" + sourceMappingURL);
+                }
+                writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, /*writeByteOrderMark*/ compilerOptions.emitBOM, sourceFiles);
+                // reset the state
+                sourceMap.reset();
+                writer.reset();
+                currentSourceFile = undefined;
+                currentText = undefined;
+                currentLineMap = undefined;
+                exportFunctionForFile = undefined;
+                contextObjectForFile = undefined;
+                generatedNameSet = undefined;
+                nodeToGeneratedName = undefined;
+                decoratedClassAliases = undefined;
+                computedPropertyNamesToGeneratedNames = undefined;
+                convertedLoopState = undefined;
+                extendsEmitted = false;
+                decorateEmitted = false;
+                paramEmitted = false;
+                awaiterEmitted = false;
+                assignEmitted = false;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                externalImports = undefined;
+                exportSpecifiers = undefined;
+                exportEquals = undefined;
+                hasExportStarsToExportValues = undefined;
+                detachedCommentsInfo = undefined;
+                sourceMapData = undefined;
+                isEs6Module = false;
+                renamedDependencies = undefined;
+                isCurrentFileExternalModule = false;
+            }
+            function emitSourceFile(sourceFile) {
+                currentSourceFile = sourceFile;
+                currentText = sourceFile.text;
+                currentLineMap = ts.getLineStarts(sourceFile);
+                exportFunctionForFile = undefined;
+                contextObjectForFile = undefined;
+                isEs6Module = sourceFile.symbol && sourceFile.symbol.exports && !!sourceFile.symbol.exports["___esModule"];
+                renamedDependencies = sourceFile.renamedDependencies;
+                currentFileIdentifiers = sourceFile.identifiers;
+                isCurrentFileExternalModule = ts.isExternalModule(sourceFile);
+                setSourceFile(sourceFile);
+                emitNodeWithCommentsAndWithoutSourcemap(sourceFile);
+            }
+            function isUniqueName(name) {
+                return !resolver.hasGlobalName(name) &&
+                    !ts.hasProperty(currentFileIdentifiers, name) &&
+                    !ts.hasProperty(generatedNameSet, name);
+            }
+            // Return the next available name in the pattern _a ... _z, _0, _1, ...
+            // TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
+            // Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
+            function makeTempVariableName(flags) {
+                if (flags && !(tempFlags & flags)) {
+                    var name_24 = flags === 268435456 /* _i */ ? "_i" : "_n";
+                    if (isUniqueName(name_24)) {
+                        tempFlags |= flags;
+                        return name_24;
+                    }
+                }
+                while (true) {
+                    var count = tempFlags & 268435455 /* CountMask */;
+                    tempFlags++;
+                    // Skip over 'i' and 'n'
+                    if (count !== 8 && count !== 13) {
+                        var name_25 = count < 26 ? "_" + String.fromCharCode(97 /* a */ + count) : "_" + (count - 26);
+                        if (isUniqueName(name_25)) {
+                            return name_25;
+                        }
+                    }
+                }
+            }
+            // Generate a name that is unique within the current file and doesn't conflict with any names
+            // in global scope. The name is formed by adding an '_n' suffix to the specified base name,
+            // where n is a positive integer. Note that names generated by makeTempVariableName and
+            // makeUniqueName are guaranteed to never conflict.
+            function makeUniqueName(baseName) {
+                // Find the first unique 'name_n', where n is a positive number
+                if (baseName.charCodeAt(baseName.length - 1) !== 95 /* _ */) {
+                    baseName += "_";
+                }
+                var i = 1;
+                while (true) {
+                    var generatedName = baseName + i;
+                    if (isUniqueName(generatedName)) {
+                        return generatedNameSet[generatedName] = generatedName;
+                    }
+                    i++;
+                }
+            }
+            function generateNameForModuleOrEnum(node) {
+                var name = node.name.text;
+                // Use module/enum name itself if it is unique, otherwise make a unique variation
+                return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
+            }
+            function generateNameForImportOrExportDeclaration(node) {
+                var expr = ts.getExternalModuleName(node);
+                var baseName = expr.kind === 9 /* StringLiteral */ ?
+                    ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module";
+                return makeUniqueName(baseName);
+            }
+            function generateNameForExportDefault() {
+                return makeUniqueName("default");
+            }
+            function generateNameForClassExpression() {
+                return makeUniqueName("class");
+            }
+            function generateNameForNode(node) {
+                switch (node.kind) {
+                    case 69 /* Identifier */:
+                        return makeUniqueName(node.text);
+                    case 225 /* ModuleDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                        return generateNameForModuleOrEnum(node);
+                    case 230 /* ImportDeclaration */:
+                    case 236 /* ExportDeclaration */:
+                        return generateNameForImportOrExportDeclaration(node);
+                    case 220 /* FunctionDeclaration */:
+                    case 221 /* ClassDeclaration */:
+                    case 235 /* ExportAssignment */:
+                        return generateNameForExportDefault();
+                    case 192 /* ClassExpression */:
+                        return generateNameForClassExpression();
+                }
+            }
+            function getGeneratedNameForNode(node) {
+                var id = ts.getNodeId(node);
+                return nodeToGeneratedName[id] || (nodeToGeneratedName[id] = ts.unescapeIdentifier(generateNameForNode(node)));
+            }
+            /** Write emitted output to disk */
+            function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) {
+                if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
+                    ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false, sourceFiles);
+                }
+                if (sourceMapDataList) {
+                    sourceMapDataList.push(sourceMap.getSourceMapData());
+                }
+                ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles);
+            }
+            // Create a temporary variable with a unique unused name.
+            function createTempVariable(flags) {
+                var result = ts.createSynthesizedNode(69 /* Identifier */);
+                result.text = makeTempVariableName(flags);
+                return result;
+            }
+            function recordTempDeclaration(name) {
+                if (!tempVariables) {
+                    tempVariables = [];
+                }
+                tempVariables.push(name);
+            }
+            function createAndRecordTempVariable(flags) {
+                var temp = createTempVariable(flags);
+                recordTempDeclaration(temp);
+                return temp;
+            }
+            function emitTempDeclarations(newLine) {
+                if (tempVariables) {
+                    if (newLine) {
+                        writeLine();
+                    }
+                    else {
+                        write(" ");
+                    }
+                    write("var ");
+                    emitCommaList(tempVariables);
+                    write(";");
+                }
+            }
+            /** Emit the text for the given token that comes after startPos
+              * This by default writes the text provided with the given tokenKind
+              * but if optional emitFn callback is provided the text is emitted using the callback instead of default text
+              * @param tokenKind the kind of the token to search and emit
+              * @param startPos the position in the source to start searching for the token
+              * @param emitFn if given will be invoked to emit the text instead of actual token emit */
+            function emitToken(tokenKind, startPos, emitFn) {
+                var tokenStartPos = ts.skipTrivia(currentText, startPos);
+                emitPos(tokenStartPos);
+                var tokenString = ts.tokenToString(tokenKind);
+                if (emitFn) {
+                    emitFn();
+                }
+                else {
+                    write(tokenString);
+                }
+                var tokenEndPos = tokenStartPos + tokenString.length;
+                emitPos(tokenEndPos);
+                return tokenEndPos;
+            }
+            function emitOptional(prefix, node) {
+                if (node) {
+                    write(prefix);
+                    emit(node);
+                }
+            }
+            function emitParenthesizedIf(node, parenthesized) {
+                if (parenthesized) {
+                    write("(");
+                }
+                emit(node);
+                if (parenthesized) {
+                    write(")");
+                }
+            }
+            function emitLinePreservingList(parent, nodes, allowTrailingComma, spacesBetweenBraces) {
+                ts.Debug.assert(nodes.length > 0);
+                increaseIndent();
+                if (nodeStartPositionsAreOnSameLine(parent, nodes[0])) {
+                    if (spacesBetweenBraces) {
+                        write(" ");
+                    }
+                }
+                else {
+                    writeLine();
+                }
+                for (var i = 0, n = nodes.length; i < n; i++) {
+                    if (i) {
+                        if (nodeEndIsOnSameLineAsNodeStart(nodes[i - 1], nodes[i])) {
+                            write(", ");
+                        }
+                        else {
+                            write(",");
+                            writeLine();
+                        }
+                    }
+                    emit(nodes[i]);
+                }
+                if (nodes.hasTrailingComma && allowTrailingComma) {
+                    write(",");
+                }
+                decreaseIndent();
+                if (nodeEndPositionsAreOnSameLine(parent, ts.lastOrUndefined(nodes))) {
+                    if (spacesBetweenBraces) {
+                        write(" ");
+                    }
+                }
+                else {
+                    writeLine();
+                }
+            }
+            function emitList(nodes, start, count, multiLine, trailingComma, leadingComma, noTrailingNewLine, emitNode) {
+                if (!emitNode) {
+                    emitNode = emit;
+                }
+                for (var i = 0; i < count; i++) {
+                    if (multiLine) {
+                        if (i || leadingComma) {
+                            write(",");
+                        }
+                        writeLine();
+                    }
+                    else {
+                        if (i || leadingComma) {
+                            write(", ");
+                        }
+                    }
+                    var node = nodes[start + i];
+                    // This emitting is to make sure we emit following comment properly
+                    //   ...(x, /*comment1*/ y)...
+                    //         ^ => node.pos
+                    // "comment1" is not considered leading comment for "y" but rather
+                    // considered as trailing comment of the previous node.
+                    emitTrailingCommentsOfPosition(node.pos);
+                    emitNode(node);
+                    leadingComma = true;
+                }
+                if (trailingComma) {
+                    write(",");
+                }
+                if (multiLine && !noTrailingNewLine) {
+                    writeLine();
+                }
+                return count;
+            }
+            function emitCommaList(nodes) {
+                if (nodes) {
+                    emitList(nodes, 0, nodes.length, /*multiLine*/ false, /*trailingComma*/ false);
+                }
+            }
+            function emitLines(nodes) {
+                emitLinesStartingAt(nodes, /*startIndex*/ 0);
+            }
+            function emitLinesStartingAt(nodes, startIndex) {
+                for (var i = startIndex; i < nodes.length; i++) {
+                    writeLine();
+                    emit(nodes[i]);
+                }
+            }
+            function isBinaryOrOctalIntegerLiteral(node, text) {
+                if (node.kind === 8 /* NumericLiteral */ && text.length > 1) {
+                    switch (text.charCodeAt(1)) {
+                        case 98 /* b */:
+                        case 66 /* B */:
+                        case 111 /* o */:
+                        case 79 /* O */:
+                            return true;
+                    }
+                }
+                return false;
+            }
+            function emitLiteral(node) {
+                var text = getLiteralText(node);
+                if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap) && (node.kind === 9 /* StringLiteral */ || ts.isTemplateLiteralKind(node.kind))) {
+                    writer.writeLiteral(text);
+                }
+                else if (languageVersion < 2 /* ES6 */ && isBinaryOrOctalIntegerLiteral(node, text)) {
+                    write(node.text);
+                }
+                else {
+                    write(text);
+                }
+            }
+            function getLiteralText(node) {
+                // Any template literal or string literal with an extended escape
+                // (e.g. "\u{0067}") will need to be downleveled as a escaped string literal.
+                if (languageVersion < 2 /* ES6 */ && (ts.isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) {
+                    return getQuotedEscapedLiteralText('"', node.text, '"');
+                }
+                // If we don't need to downlevel and we can reach the original source text using
+                // the node's parent reference, then simply get the text as it was originally written.
+                if (node.parent) {
+                    return ts.getTextOfNodeFromSourceText(currentText, node);
+                }
+                // If we can't reach the original source text, use the canonical form if it's a number,
+                // or an escaped quoted form of the original text if it's string-like.
+                switch (node.kind) {
+                    case 9 /* StringLiteral */:
+                        return getQuotedEscapedLiteralText('"', node.text, '"');
+                    case 11 /* NoSubstitutionTemplateLiteral */:
+                        return getQuotedEscapedLiteralText("`", node.text, "`");
+                    case 12 /* TemplateHead */:
+                        return getQuotedEscapedLiteralText("`", node.text, "${");
+                    case 13 /* TemplateMiddle */:
+                        return getQuotedEscapedLiteralText("}", node.text, "${");
+                    case 14 /* TemplateTail */:
+                        return getQuotedEscapedLiteralText("}", node.text, "`");
+                    case 8 /* NumericLiteral */:
+                        return node.text;
+                }
+                ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
+            }
+            function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) {
+                return leftQuote + ts.escapeNonAsciiCharacters(ts.escapeString(text)) + rightQuote;
+            }
+            function emitDownlevelRawTemplateLiteral(node) {
+                // Find original source text, since we need to emit the raw strings of the tagged template.
+                // The raw strings contain the (escaped) strings of what the user wrote.
+                // Examples: `\n` is converted to "\\n", a template string with a newline to "\n".
+                var text = ts.getTextOfNodeFromSourceText(currentText, node);
+                // text contains the original source, it will also contain quotes ("`"), dollar signs and braces ("${" and "}"),
+                // thus we need to remove those characters.
+                // First template piece starts with "`", others with "}"
+                // Last template piece ends with "`", others with "${"
+                var isLast = node.kind === 11 /* NoSubstitutionTemplateLiteral */ || node.kind === 14 /* TemplateTail */;
+                text = text.substring(1, text.length - (isLast ? 1 : 2));
+                // Newline normalization:
+                // ES6 Spec 11.8.6.1 - Static Semantics of TV's and TRV's
+                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for both TV and TRV.
+                text = text.replace(/\r\n?/g, "\n");
+                text = ts.escapeString(text);
+                write("\"" + text + "\"");
+            }
+            function emitDownlevelTaggedTemplateArray(node, literalEmitter) {
+                write("[");
+                if (node.template.kind === 11 /* NoSubstitutionTemplateLiteral */) {
+                    literalEmitter(node.template);
+                }
+                else {
+                    literalEmitter(node.template.head);
+                    ts.forEach(node.template.templateSpans, function (child) {
+                        write(", ");
+                        literalEmitter(child.literal);
+                    });
+                }
+                write("]");
+            }
+            function emitDownlevelTaggedTemplate(node) {
+                var tempVariable = createAndRecordTempVariable(0 /* Auto */);
+                write("(");
+                emit(tempVariable);
+                write(" = ");
+                emitDownlevelTaggedTemplateArray(node, emit);
+                write(", ");
+                emit(tempVariable);
+                write(".raw = ");
+                emitDownlevelTaggedTemplateArray(node, emitDownlevelRawTemplateLiteral);
+                write(", ");
+                emitParenthesizedIf(node.tag, needsParenthesisForPropertyAccessOrInvocation(node.tag));
+                write("(");
+                emit(tempVariable);
+                // Now we emit the expressions
+                if (node.template.kind === 189 /* TemplateExpression */) {
+                    ts.forEach(node.template.templateSpans, function (templateSpan) {
+                        write(", ");
+                        var needsParens = templateSpan.expression.kind === 187 /* BinaryExpression */
+                            && templateSpan.expression.operatorToken.kind === 24 /* CommaToken */;
+                        emitParenthesizedIf(templateSpan.expression, needsParens);
+                    });
+                }
+                write("))");
+            }
+            function emitTemplateExpression(node) {
+                // In ES6 mode and above, we can simply emit each portion of a template in order, but in
+                // ES3 & ES5 we must convert the template expression into a series of string concatenations.
+                if (languageVersion >= 2 /* ES6 */) {
+                    ts.forEachChild(node, emit);
+                    return;
+                }
+                var emitOuterParens = ts.isExpression(node.parent)
+                    && templateNeedsParens(node, node.parent);
+                if (emitOuterParens) {
+                    write("(");
+                }
+                var headEmitted = false;
+                if (shouldEmitTemplateHead()) {
+                    emitLiteral(node.head);
+                    headEmitted = true;
+                }
+                for (var i = 0, n = node.templateSpans.length; i < n; i++) {
+                    var templateSpan = node.templateSpans[i];
+                    // Check if the expression has operands and binds its operands less closely than binary '+'.
+                    // If it does, we need to wrap the expression in parentheses. Otherwise, something like
+                    //    `abc${ 1 << 2 }`
+                    // becomes
+                    //    "abc" + 1 << 2 + ""
+                    // which is really
+                    //    ("abc" + 1) << (2 + "")
+                    // rather than
+                    //    "abc" + (1 << 2) + ""
+                    var needsParens = templateSpan.expression.kind !== 178 /* ParenthesizedExpression */
+                        && comparePrecedenceToBinaryPlus(templateSpan.expression) !== 1 /* GreaterThan */;
+                    if (i > 0 || headEmitted) {
+                        // If this is the first span and the head was not emitted, then this templateSpan's
+                        // expression will be the first to be emitted. Don't emit the preceding ' + ' in that
+                        // case.
+                        write(" + ");
+                    }
+                    emitParenthesizedIf(templateSpan.expression, needsParens);
+                    // Only emit if the literal is non-empty.
+                    // The binary '+' operator is left-associative, so the first string concatenation
+                    // with the head will force the result up to this point to be a string.
+                    // Emitting a '+ ""' has no semantic effect for middles and tails.
+                    if (templateSpan.literal.text.length !== 0) {
+                        write(" + ");
+                        emitLiteral(templateSpan.literal);
+                    }
+                }
+                if (emitOuterParens) {
+                    write(")");
+                }
+                function shouldEmitTemplateHead() {
+                    // If this expression has an empty head literal and the first template span has a non-empty
+                    // literal, then emitting the empty head literal is not necessary.
+                    //     `${ foo } and ${ bar }`
+                    // can be emitted as
+                    //     foo + " and " + bar
+                    // This is because it is only required that one of the first two operands in the emit
+                    // output must be a string literal, so that the other operand and all following operands
+                    // are forced into strings.
+                    //
+                    // If the first template span has an empty literal, then the head must still be emitted.
+                    //     `${ foo }${ bar }`
+                    // must still be emitted as
+                    //     "" + foo + bar
+                    // There is always atleast one templateSpan in this code path, since
+                    // NoSubstitutionTemplateLiterals are directly emitted via emitLiteral()
+                    ts.Debug.assert(node.templateSpans.length !== 0);
+                    return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0;
+                }
+                function templateNeedsParens(template, parent) {
+                    switch (parent.kind) {
+                        case 174 /* CallExpression */:
+                        case 175 /* NewExpression */:
+                            return parent.expression === template;
+                        case 176 /* TaggedTemplateExpression */:
+                        case 178 /* ParenthesizedExpression */:
+                            return false;
+                        default:
+                            return comparePrecedenceToBinaryPlus(parent) !== -1 /* LessThan */;
+                    }
+                }
+                /**
+                 * Returns whether the expression has lesser, greater,
+                 * or equal precedence to the binary '+' operator
+                 */
+                function comparePrecedenceToBinaryPlus(expression) {
+                    // All binary expressions have lower precedence than '+' apart from '*', '/', and '%'
+                    // which have greater precedence and '-' which has equal precedence.
+                    // All unary operators have a higher precedence apart from yield.
+                    // Arrow functions and conditionals have a lower precedence,
+                    // although we convert the former into regular function expressions in ES5 mode,
+                    // and in ES6 mode this function won't get called anyway.
+                    //
+                    // TODO (drosen): Note that we need to account for the upcoming 'yield' and
+                    //                spread ('...') unary operators that are anticipated for ES6.
+                    switch (expression.kind) {
+                        case 187 /* BinaryExpression */:
+                            switch (expression.operatorToken.kind) {
+                                case 37 /* AsteriskToken */:
+                                case 39 /* SlashToken */:
+                                case 40 /* PercentToken */:
+                                    return 1 /* GreaterThan */;
+                                case 35 /* PlusToken */:
+                                case 36 /* MinusToken */:
+                                    return 0 /* EqualTo */;
+                                default:
+                                    return -1 /* LessThan */;
+                            }
+                        case 190 /* YieldExpression */:
+                        case 188 /* ConditionalExpression */:
+                            return -1 /* LessThan */;
+                        default:
+                            return 1 /* GreaterThan */;
+                    }
+                }
+            }
+            function emitTemplateSpan(span) {
+                emit(span.expression);
+                emit(span.literal);
+            }
+            function jsxEmitReact(node) {
+                /// Emit a tag name, which is either '"div"' for lower-cased names, or
+                /// 'Div' for upper-cased or dotted names
+                function emitTagName(name) {
+                    if (name.kind === 69 /* Identifier */ && ts.isIntrinsicJsxName(name.text)) {
+                        write('"');
+                        emit(name);
+                        write('"');
+                    }
+                    else {
+                        emit(name);
+                    }
+                }
+                /// Emit an attribute name, which is quoted if it needs to be quoted. Because
+                /// these emit into an object literal property name, we don't need to be worried
+                /// about keywords, just non-identifier characters
+                function emitAttributeName(name) {
+                    if (/^[A-Za-z_]\w*$/.test(name.text)) {
+                        emit(name);
+                    }
+                    else {
+                        write('"');
+                        emit(name);
+                        write('"');
+                    }
+                }
+                /// Emit an name/value pair for an attribute (e.g. "x: 3")
+                function emitJsxAttribute(node) {
+                    emitAttributeName(node.name);
+                    write(": ");
+                    if (node.initializer) {
+                        emit(node.initializer);
+                    }
+                    else {
+                        write("true");
+                    }
+                }
+                function emitJsxElement(openingNode, children) {
+                    var syntheticReactRef = ts.createSynthesizedNode(69 /* Identifier */);
+                    syntheticReactRef.text = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
+                    syntheticReactRef.parent = openingNode;
+                    // Call React.createElement(tag, ...
+                    emitLeadingComments(openingNode);
+                    emitExpressionIdentifier(syntheticReactRef);
+                    write(".createElement(");
+                    emitTagName(openingNode.tagName);
+                    write(", ");
+                    // Attribute list
+                    if (openingNode.attributes.length === 0) {
+                        // When there are no attributes, React wants "null"
+                        write("null");
+                    }
+                    else {
+                        // Either emit one big object literal (no spread attribs), or
+                        // a call to the __assign helper
+                        var attrs = openingNode.attributes;
+                        if (ts.forEach(attrs, function (attr) { return attr.kind === 247 /* JsxSpreadAttribute */; })) {
+                            write("__assign(");
+                            var haveOpenedObjectLiteral = false;
+                            for (var i = 0; i < attrs.length; i++) {
+                                if (attrs[i].kind === 247 /* JsxSpreadAttribute */) {
+                                    // If this is the first argument, we need to emit a {} as the first argument
+                                    if (i === 0) {
+                                        write("{}, ");
+                                    }
+                                    if (haveOpenedObjectLiteral) {
+                                        write("}");
+                                        haveOpenedObjectLiteral = false;
+                                    }
+                                    if (i > 0) {
+                                        write(", ");
+                                    }
+                                    emit(attrs[i].expression);
+                                }
+                                else {
+                                    ts.Debug.assert(attrs[i].kind === 246 /* JsxAttribute */);
+                                    if (haveOpenedObjectLiteral) {
+                                        write(", ");
+                                    }
+                                    else {
+                                        haveOpenedObjectLiteral = true;
+                                        if (i > 0) {
+                                            write(", ");
+                                        }
+                                        write("{");
+                                    }
+                                    emitJsxAttribute(attrs[i]);
+                                }
+                            }
+                            if (haveOpenedObjectLiteral)
+                                write("}");
+                            write(")"); // closing paren to React.__spread(
+                        }
+                        else {
+                            // One object literal with all the attributes in them
+                            write("{");
+                            for (var i = 0, n = attrs.length; i < n; i++) {
+                                if (i > 0) {
+                                    write(", ");
+                                }
+                                emitJsxAttribute(attrs[i]);
+                            }
+                            write("}");
+                        }
+                    }
+                    // Children
+                    if (children) {
+                        var firstChild = void 0;
+                        var multipleEmittableChildren = false;
+                        for (var i = 0, n = children.length; i < n; i++) {
+                            var jsxChild = children[i];
+                            if (isJsxChildEmittable(jsxChild)) {
+                                // we need to decide whether to emit in single line or multiple lines as indented list
+                                // store firstChild reference, if we see another emittable child, then emit accordingly
+                                if (!firstChild) {
+                                    write(", ");
+                                    firstChild = jsxChild;
+                                }
+                                else {
+                                    // more than one emittable child, emit indented list
+                                    if (!multipleEmittableChildren) {
+                                        multipleEmittableChildren = true;
+                                        increaseIndent();
+                                        writeLine();
+                                        emit(firstChild);
+                                    }
+                                    write(", ");
+                                    writeLine();
+                                    emit(jsxChild);
+                                }
+                            }
+                        }
+                        if (multipleEmittableChildren) {
+                            decreaseIndent();
+                        }
+                        else if (firstChild) {
+                            if (firstChild.kind !== 241 /* JsxElement */ && firstChild.kind !== 242 /* JsxSelfClosingElement */) {
+                                emit(firstChild);
+                            }
+                            else {
+                                // If the only child is jsx element, put it on a new indented line
+                                increaseIndent();
+                                writeLine();
+                                emit(firstChild);
+                                writeLine();
+                                decreaseIndent();
+                            }
+                        }
+                    }
+                    // Closing paren
+                    write(")"); // closes "React.createElement("
+                    emitTrailingComments(openingNode);
+                }
+                if (node.kind === 241 /* JsxElement */) {
+                    emitJsxElement(node.openingElement, node.children);
+                }
+                else {
+                    ts.Debug.assert(node.kind === 242 /* JsxSelfClosingElement */);
+                    emitJsxElement(node);
+                }
+            }
+            function jsxEmitPreserve(node) {
+                function emitJsxAttribute(node) {
+                    emit(node.name);
+                    if (node.initializer) {
+                        write("=");
+                        emit(node.initializer);
+                    }
+                }
+                function emitJsxSpreadAttribute(node) {
+                    write("{...");
+                    emit(node.expression);
+                    write("}");
+                }
+                function emitAttributes(attribs) {
+                    for (var i = 0, n = attribs.length; i < n; i++) {
+                        if (i > 0) {
+                            write(" ");
+                        }
+                        if (attribs[i].kind === 247 /* JsxSpreadAttribute */) {
+                            emitJsxSpreadAttribute(attribs[i]);
+                        }
+                        else {
+                            ts.Debug.assert(attribs[i].kind === 246 /* JsxAttribute */);
+                            emitJsxAttribute(attribs[i]);
+                        }
+                    }
+                }
+                function emitJsxOpeningOrSelfClosingElement(node) {
+                    write("<");
+                    emit(node.tagName);
+                    if (node.attributes.length > 0 || (node.kind === 242 /* JsxSelfClosingElement */)) {
+                        write(" ");
+                    }
+                    emitAttributes(node.attributes);
+                    if (node.kind === 242 /* JsxSelfClosingElement */) {
+                        write("/>");
+                    }
+                    else {
+                        write(">");
+                    }
+                }
+                function emitJsxClosingElement(node) {
+                    write("</");
+                    emit(node.tagName);
+                    write(">");
+                }
+                function emitJsxElement(node) {
+                    emitJsxOpeningOrSelfClosingElement(node.openingElement);
+                    for (var i = 0, n = node.children.length; i < n; i++) {
+                        emit(node.children[i]);
+                    }
+                    emitJsxClosingElement(node.closingElement);
+                }
+                if (node.kind === 241 /* JsxElement */) {
+                    emitJsxElement(node);
+                }
+                else {
+                    ts.Debug.assert(node.kind === 242 /* JsxSelfClosingElement */);
+                    emitJsxOpeningOrSelfClosingElement(node);
+                }
+            }
+            // This function specifically handles numeric/string literals for enum and accessor 'identifiers'.
+            // In a sense, it does not actually emit identifiers as much as it declares a name for a specific property.
+            // For example, this is utilized when feeding in a result to Object.defineProperty.
+            function emitExpressionForPropertyName(node) {
+                ts.Debug.assert(node.kind !== 169 /* BindingElement */);
+                if (node.kind === 9 /* StringLiteral */) {
+                    emitLiteral(node);
+                }
+                else if (node.kind === 140 /* ComputedPropertyName */) {
+                    // if this is a decorated computed property, we will need to capture the result
+                    // of the property expression so that we can apply decorators later. This is to ensure
+                    // we don't introduce unintended side effects:
+                    //
+                    //   class C {
+                    //     [_a = x]() { }
+                    //   }
+                    //
+                    // The emit for the decorated computed property decorator is:
+                    //
+                    //   __decorate([dec], C.prototype, _a, Object.getOwnPropertyDescriptor(C.prototype, _a));
+                    //
+                    if (ts.nodeIsDecorated(node.parent)) {
+                        if (!computedPropertyNamesToGeneratedNames) {
+                            computedPropertyNamesToGeneratedNames = [];
+                        }
+                        var generatedName = computedPropertyNamesToGeneratedNames[ts.getNodeId(node)];
+                        if (generatedName) {
+                            // we have already generated a variable for this node, write that value instead.
+                            write(generatedName);
+                            return;
+                        }
+                        generatedName = createAndRecordTempVariable(0 /* Auto */).text;
+                        computedPropertyNamesToGeneratedNames[ts.getNodeId(node)] = generatedName;
+                        write(generatedName);
+                        write(" = ");
+                    }
+                    emit(node.expression);
+                }
+                else {
+                    write('"');
+                    if (node.kind === 8 /* NumericLiteral */) {
+                        write(node.text);
+                    }
+                    else {
+                        writeTextOfNode(currentText, node);
+                    }
+                    write('"');
+                }
+            }
+            function isExpressionIdentifier(node) {
+                var parent = node.parent;
+                switch (parent.kind) {
+                    case 170 /* ArrayLiteralExpression */:
+                    case 195 /* AsExpression */:
+                    case 184 /* AwaitExpression */:
+                    case 187 /* BinaryExpression */:
+                    case 174 /* CallExpression */:
+                    case 249 /* CaseClause */:
+                    case 140 /* ComputedPropertyName */:
+                    case 188 /* ConditionalExpression */:
+                    case 143 /* Decorator */:
+                    case 181 /* DeleteExpression */:
+                    case 204 /* DoStatement */:
+                    case 173 /* ElementAccessExpression */:
+                    case 235 /* ExportAssignment */:
+                    case 202 /* ExpressionStatement */:
+                    case 194 /* ExpressionWithTypeArguments */:
+                    case 206 /* ForStatement */:
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                    case 203 /* IfStatement */:
+                    case 245 /* JsxClosingElement */:
+                    case 242 /* JsxSelfClosingElement */:
+                    case 243 /* JsxOpeningElement */:
+                    case 247 /* JsxSpreadAttribute */:
+                    case 248 /* JsxExpression */:
+                    case 175 /* NewExpression */:
+                    case 196 /* NonNullExpression */:
+                    case 178 /* ParenthesizedExpression */:
+                    case 186 /* PostfixUnaryExpression */:
+                    case 185 /* PrefixUnaryExpression */:
+                    case 211 /* ReturnStatement */:
+                    case 254 /* ShorthandPropertyAssignment */:
+                    case 191 /* SpreadElementExpression */:
+                    case 213 /* SwitchStatement */:
+                    case 176 /* TaggedTemplateExpression */:
+                    case 197 /* TemplateSpan */:
+                    case 215 /* ThrowStatement */:
+                    case 177 /* TypeAssertionExpression */:
+                    case 182 /* TypeOfExpression */:
+                    case 183 /* VoidExpression */:
+                    case 205 /* WhileStatement */:
+                    case 212 /* WithStatement */:
+                    case 190 /* YieldExpression */:
+                        return true;
+                    case 169 /* BindingElement */:
+                    case 255 /* EnumMember */:
+                    case 142 /* Parameter */:
+                    case 253 /* PropertyAssignment */:
+                    case 145 /* PropertyDeclaration */:
+                    case 218 /* VariableDeclaration */:
+                        return parent.initializer === node;
+                    case 172 /* PropertyAccessExpression */:
+                        return parent.expression === node;
+                    case 180 /* ArrowFunction */:
+                    case 179 /* FunctionExpression */:
+                        return parent.body === node;
+                    case 229 /* ImportEqualsDeclaration */:
+                        return parent.moduleReference === node;
+                    case 139 /* QualifiedName */:
+                        return parent.left === node;
+                }
+                return false;
+            }
+            function emitExpressionIdentifier(node) {
+                var container = resolver.getReferencedExportContainer(node);
+                if (container) {
+                    if (container.kind === 256 /* SourceFile */) {
+                        // Identifier references module export
+                        if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
+                            write("exports.");
+                        }
+                    }
+                    else {
+                        // Identifier references namespace export
+                        write(getGeneratedNameForNode(container));
+                        write(".");
+                    }
+                }
+                else {
+                    if (modulekind !== ts.ModuleKind.ES6) {
+                        var declaration = resolver.getReferencedImportDeclaration(node);
+                        if (declaration) {
+                            if (declaration.kind === 231 /* ImportClause */) {
+                                // Identifier references default import
+                                write(getGeneratedNameForNode(declaration.parent));
+                                write(languageVersion === 0 /* ES3 */ ? '["default"]' : ".default");
+                                return;
+                            }
+                            else if (declaration.kind === 234 /* ImportSpecifier */) {
+                                // Identifier references named import
+                                write(getGeneratedNameForNode(declaration.parent.parent.parent));
+                                var name_26 = declaration.propertyName || declaration.name;
+                                var identifier = ts.getTextOfNodeFromSourceText(currentText, name_26);
+                                if (languageVersion === 0 /* ES3 */ && identifier === "default") {
+                                    write('["default"]');
+                                }
+                                else {
+                                    write(".");
+                                    write(identifier);
+                                }
+                                return;
+                            }
+                        }
+                    }
+                    if (languageVersion < 2 /* ES6 */) {
+                        var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
+                        if (declaration) {
+                            write(getGeneratedNameForNode(declaration.name));
+                            return;
+                        }
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & 1048576 /* BodyScopedClassBinding */) {
+                        // Due to the emit for class decorators, any reference to the class from inside of the class body
+                        // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
+                        // behavior of class names in ES6.
+                        var declaration = resolver.getReferencedValueDeclaration(node);
+                        if (declaration) {
+                            var classAlias = decoratedClassAliases[ts.getNodeId(declaration)];
+                            if (classAlias !== undefined) {
+                                write(classAlias);
+                                return;
+                            }
+                        }
+                    }
+                }
+                if (ts.nodeIsSynthesized(node)) {
+                    write(node.text);
+                }
+                else {
+                    writeTextOfNode(currentText, node);
+                }
+            }
+            function isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node) {
+                if (languageVersion < 2 /* ES6 */) {
+                    var parent_13 = node.parent;
+                    switch (parent_13.kind) {
+                        case 169 /* BindingElement */:
+                        case 221 /* ClassDeclaration */:
+                        case 224 /* EnumDeclaration */:
+                        case 218 /* VariableDeclaration */:
+                            return parent_13.name === node && resolver.isDeclarationWithCollidingName(parent_13);
+                    }
+                }
+                return false;
+            }
+            function emitIdentifier(node) {
+                if (convertedLoopState) {
+                    if (node.text == "arguments" && resolver.isArgumentsLocalBinding(node)) {
+                        // in converted loop body arguments cannot be used directly.
+                        var name_27 = convertedLoopState.argumentsName || (convertedLoopState.argumentsName = makeUniqueName("arguments"));
+                        write(name_27);
+                        return;
+                    }
+                }
+                if (!node.parent) {
+                    write(node.text);
+                }
+                else if (isExpressionIdentifier(node)) {
+                    emitExpressionIdentifier(node);
+                }
+                else if (isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node)) {
+                    write(getGeneratedNameForNode(node));
+                }
+                else if (ts.nodeIsSynthesized(node)) {
+                    write(node.text);
+                }
+                else {
+                    writeTextOfNode(currentText, node);
+                }
+            }
+            function emitThis(node) {
+                if (resolver.getNodeCheckFlags(node) & 2 /* LexicalThis */) {
+                    write("_this");
+                }
+                else if (convertedLoopState) {
+                    write(convertedLoopState.thisName || (convertedLoopState.thisName = makeUniqueName("this")));
+                }
+                else {
+                    write("this");
+                }
+            }
+            function emitSuper(node) {
+                if (languageVersion >= 2 /* ES6 */) {
+                    write("super");
+                }
+                else {
+                    var flags = resolver.getNodeCheckFlags(node);
+                    if (flags & 256 /* SuperInstance */) {
+                        write("_super.prototype");
+                    }
+                    else {
+                        write("_super");
+                    }
+                }
+            }
+            function emitObjectBindingPattern(node) {
+                write("{ ");
+                var elements = node.elements;
+                emitList(elements, 0, elements.length, /*multiLine*/ false, /*trailingComma*/ elements.hasTrailingComma);
+                write(" }");
+            }
+            function emitArrayBindingPattern(node) {
+                write("[");
+                var elements = node.elements;
+                emitList(elements, 0, elements.length, /*multiLine*/ false, /*trailingComma*/ elements.hasTrailingComma);
+                write("]");
+            }
+            function emitBindingElement(node) {
+                if (node.propertyName) {
+                    emit(node.propertyName);
+                    write(": ");
+                }
+                if (node.dotDotDotToken) {
+                    write("...");
+                }
+                if (ts.isBindingPattern(node.name)) {
+                    emit(node.name);
+                }
+                else {
+                    emitModuleMemberName(node);
+                }
+                emitOptional(" = ", node.initializer);
+            }
+            function emitSpreadElementExpression(node) {
+                write("...");
+                emit(node.expression);
+            }
+            function emitYieldExpression(node) {
+                write(ts.tokenToString(114 /* YieldKeyword */));
+                if (node.asteriskToken) {
+                    write("*");
+                }
+                if (node.expression) {
+                    write(" ");
+                    emit(node.expression);
+                }
+            }
+            function emitAwaitExpression(node) {
+                var needsParenthesis = needsParenthesisForAwaitExpressionAsYield(node);
+                if (needsParenthesis) {
+                    write("(");
+                }
+                write(ts.tokenToString(114 /* YieldKeyword */));
+                write(" ");
+                emit(node.expression);
+                if (needsParenthesis) {
+                    write(")");
+                }
+            }
+            function needsParenthesisForAwaitExpressionAsYield(node) {
+                if (node.parent.kind === 187 /* BinaryExpression */ && !ts.isAssignmentOperator(node.parent.operatorToken.kind)) {
+                    return true;
+                }
+                else if (node.parent.kind === 188 /* ConditionalExpression */ && node.parent.condition === node) {
+                    return true;
+                }
+                return false;
+            }
+            function needsParenthesisForPropertyAccessOrInvocation(node) {
+                switch (node.kind) {
+                    case 69 /* Identifier */:
+                    case 170 /* ArrayLiteralExpression */:
+                    case 172 /* PropertyAccessExpression */:
+                    case 173 /* ElementAccessExpression */:
+                    case 174 /* CallExpression */:
+                    case 178 /* ParenthesizedExpression */:
+                        // This list is not exhaustive and only includes those cases that are relevant
+                        // to the check in emitArrayLiteral. More cases can be added as needed.
+                        return false;
+                }
+                return true;
+            }
+            function emitListWithSpread(elements, needsUniqueCopy, multiLine, trailingComma, useConcat) {
+                var pos = 0;
+                var group = 0;
+                var length = elements.length;
+                while (pos < length) {
+                    // Emit using the pattern <group0>.concat(<group1>, <group2>, ...)
+                    if (group === 1 && useConcat) {
+                        write(".concat(");
+                    }
+                    else if (group > 0) {
+                        write(", ");
+                    }
+                    var e = elements[pos];
+                    if (e.kind === 191 /* SpreadElementExpression */) {
+                        e = e.expression;
+                        emitParenthesizedIf(e, /*parenthesized*/ group === 0 && needsParenthesisForPropertyAccessOrInvocation(e));
+                        pos++;
+                        if (pos === length && group === 0 && needsUniqueCopy && e.kind !== 170 /* ArrayLiteralExpression */) {
+                            write(".slice()");
+                        }
+                    }
+                    else {
+                        var i = pos;
+                        while (i < length && elements[i].kind !== 191 /* SpreadElementExpression */) {
+                            i++;
+                        }
+                        write("[");
+                        if (multiLine) {
+                            increaseIndent();
+                        }
+                        emitList(elements, pos, i - pos, multiLine, trailingComma && i === length);
+                        if (multiLine) {
+                            decreaseIndent();
+                        }
+                        write("]");
+                        pos = i;
+                    }
+                    group++;
+                }
+                if (group > 1) {
+                    if (useConcat) {
+                        write(")");
+                    }
+                }
+            }
+            function isSpreadElementExpression(node) {
+                return node.kind === 191 /* SpreadElementExpression */;
+            }
+            function emitArrayLiteral(node) {
+                var elements = node.elements;
+                if (elements.length === 0) {
+                    write("[]");
+                }
+                else if (languageVersion >= 2 /* ES6 */ || !ts.forEach(elements, isSpreadElementExpression)) {
+                    write("[");
+                    emitLinePreservingList(node, node.elements, elements.hasTrailingComma, /*spacesBetweenBraces*/ false);
+                    write("]");
+                }
+                else {
+                    emitListWithSpread(elements, /*needsUniqueCopy*/ true, /*multiLine*/ node.multiLine, 
+                    /*trailingComma*/ elements.hasTrailingComma, /*useConcat*/ true);
+                }
+            }
+            function emitObjectLiteralBody(node, numElements) {
+                if (numElements === 0) {
+                    write("{}");
+                    return;
+                }
+                write("{");
+                if (numElements > 0) {
+                    var properties = node.properties;
+                    // If we are not doing a downlevel transformation for object literals,
+                    // then try to preserve the original shape of the object literal.
+                    // Otherwise just try to preserve the formatting.
+                    if (numElements === properties.length) {
+                        emitLinePreservingList(node, properties, /*allowTrailingComma*/ languageVersion >= 1 /* ES5 */, /*spacesBetweenBraces*/ true);
+                    }
+                    else {
+                        var multiLine = node.multiLine;
+                        if (!multiLine) {
+                            write(" ");
+                        }
+                        else {
+                            increaseIndent();
+                        }
+                        emitList(properties, 0, numElements, /*multiLine*/ multiLine, /*trailingComma*/ false);
+                        if (!multiLine) {
+                            write(" ");
+                        }
+                        else {
+                            decreaseIndent();
+                        }
+                    }
+                }
+                write("}");
+            }
+            function emitDownlevelObjectLiteralWithComputedProperties(node, firstComputedPropertyIndex) {
+                var multiLine = node.multiLine;
+                var properties = node.properties;
+                write("(");
+                if (multiLine) {
+                    increaseIndent();
+                }
+                // For computed properties, we need to create a unique handle to the object
+                // literal so we can modify it without risking internal assignments tainting the object.
+                var tempVar = createAndRecordTempVariable(0 /* Auto */);
+                // Write out the first non-computed properties
+                // (or all properties if none of them are computed),
+                // then emit the rest through indexing on the temp variable.
+                emit(tempVar);
+                write(" = ");
+                emitObjectLiteralBody(node, firstComputedPropertyIndex);
+                for (var i = firstComputedPropertyIndex, n = properties.length; i < n; i++) {
+                    writeComma();
+                    var property = properties[i];
+                    emitStart(property);
+                    if (property.kind === 149 /* GetAccessor */ || property.kind === 150 /* SetAccessor */) {
+                        // TODO (drosen): Reconcile with 'emitMemberFunctions'.
+                        var accessors = ts.getAllAccessorDeclarations(node.properties, property);
+                        if (property !== accessors.firstAccessor) {
+                            continue;
+                        }
+                        write("Object.defineProperty(");
+                        emit(tempVar);
+                        write(", ");
+                        emitStart(property.name);
+                        emitExpressionForPropertyName(property.name);
+                        emitEnd(property.name);
+                        write(", {");
+                        increaseIndent();
+                        if (accessors.getAccessor) {
+                            writeLine();
+                            emitLeadingComments(accessors.getAccessor);
+                            write("get: ");
+                            emitStart(accessors.getAccessor);
+                            write("function ");
+                            emitSignatureAndBody(accessors.getAccessor);
+                            emitEnd(accessors.getAccessor);
+                            emitTrailingComments(accessors.getAccessor);
+                            write(",");
+                        }
+                        if (accessors.setAccessor) {
+                            writeLine();
+                            emitLeadingComments(accessors.setAccessor);
+                            write("set: ");
+                            emitStart(accessors.setAccessor);
+                            write("function ");
+                            emitSignatureAndBody(accessors.setAccessor);
+                            emitEnd(accessors.setAccessor);
+                            emitTrailingComments(accessors.setAccessor);
+                            write(",");
+                        }
+                        writeLine();
+                        write("enumerable: true,");
+                        writeLine();
+                        write("configurable: true");
+                        decreaseIndent();
+                        writeLine();
+                        write("})");
+                        emitEnd(property);
+                    }
+                    else {
+                        emitLeadingComments(property);
+                        emitStart(property.name);
+                        emit(tempVar);
+                        emitMemberAccessForPropertyName(property.name);
+                        emitEnd(property.name);
+                        write(" = ");
+                        if (property.kind === 253 /* PropertyAssignment */) {
+                            emit(property.initializer);
+                        }
+                        else if (property.kind === 254 /* ShorthandPropertyAssignment */) {
+                            emitExpressionIdentifier(property.name);
+                        }
+                        else if (property.kind === 147 /* MethodDeclaration */) {
+                            emitFunctionDeclaration(property);
+                        }
+                        else {
+                            ts.Debug.fail("ObjectLiteralElement type not accounted for: " + property.kind);
+                        }
+                    }
+                    emitEnd(property);
+                }
+                writeComma();
+                emit(tempVar);
+                if (multiLine) {
+                    decreaseIndent();
+                    writeLine();
+                }
+                write(")");
+                function writeComma() {
+                    if (multiLine) {
+                        write(",");
+                        writeLine();
+                    }
+                    else {
+                        write(", ");
+                    }
+                }
+            }
+            function emitObjectLiteral(node) {
+                var properties = node.properties;
+                if (languageVersion < 2 /* ES6 */) {
+                    var numProperties = properties.length;
+                    // Find the first computed property.
+                    // Everything until that point can be emitted as part of the initial object literal.
+                    var numInitialNonComputedProperties = numProperties;
+                    for (var i = 0, n = properties.length; i < n; i++) {
+                        if (properties[i].name.kind === 140 /* ComputedPropertyName */) {
+                            numInitialNonComputedProperties = i;
+                            break;
+                        }
+                    }
+                    var hasComputedProperty = numInitialNonComputedProperties !== properties.length;
+                    if (hasComputedProperty) {
+                        emitDownlevelObjectLiteralWithComputedProperties(node, numInitialNonComputedProperties);
+                        return;
+                    }
+                }
+                // Ordinary case: either the object has no computed properties
+                // or we're compiling with an ES6+ target.
+                emitObjectLiteralBody(node, properties.length);
+            }
+            function createBinaryExpression(left, operator, right, startsOnNewLine) {
+                var result = ts.createSynthesizedNode(187 /* BinaryExpression */, startsOnNewLine);
+                result.operatorToken = ts.createSynthesizedNode(operator);
+                result.left = left;
+                result.right = right;
+                return result;
+            }
+            function createPropertyAccessExpression(expression, name) {
+                var result = ts.createSynthesizedNode(172 /* PropertyAccessExpression */);
+                result.expression = parenthesizeForAccess(expression);
+                result.dotToken = ts.createSynthesizedNode(21 /* DotToken */);
+                result.name = name;
+                return result;
+            }
+            function createElementAccessExpression(expression, argumentExpression) {
+                var result = ts.createSynthesizedNode(173 /* ElementAccessExpression */);
+                result.expression = parenthesizeForAccess(expression);
+                result.argumentExpression = argumentExpression;
+                return result;
+            }
+            function parenthesizeForAccess(expr) {
+                // When diagnosing whether the expression needs parentheses, the decision should be based
+                // on the innermost expression in a chain of nested type assertions.
+                while (expr.kind === 177 /* TypeAssertionExpression */ ||
+                    expr.kind === 195 /* AsExpression */ ||
+                    expr.kind === 196 /* NonNullExpression */) {
+                    expr = expr.expression;
+                }
+                // isLeftHandSideExpression is almost the correct criterion for when it is not necessary
+                // to parenthesize the expression before a dot. The known exceptions are:
+                //
+                //    NewExpression:
+                //       new C.x        -> not the same as (new C).x
+                //    NumberLiteral
+                //       1.x            -> not the same as (1).x
+                //
+                if (ts.isLeftHandSideExpression(expr) &&
+                    expr.kind !== 175 /* NewExpression */ &&
+                    expr.kind !== 8 /* NumericLiteral */) {
+                    return expr;
+                }
+                var node = ts.createSynthesizedNode(178 /* ParenthesizedExpression */);
+                node.expression = expr;
+                return node;
+            }
+            function emitComputedPropertyName(node) {
+                write("[");
+                emitExpressionForPropertyName(node);
+                write("]");
+            }
+            function emitMethod(node) {
+                if (languageVersion >= 2 /* ES6 */ && node.asteriskToken) {
+                    write("*");
+                }
+                emit(node.name);
+                if (languageVersion < 2 /* ES6 */) {
+                    write(": function ");
+                }
+                emitSignatureAndBody(node);
+            }
+            function emitPropertyAssignment(node) {
+                emit(node.name);
+                write(": ");
+                // This is to ensure that we emit comment in the following case:
+                //      For example:
+                //          obj = {
+                //              id: /*comment1*/ ()=>void
+                //          }
+                // "comment1" is not considered to be leading comment for node.initializer
+                // but rather a trailing comment on the previous node.
+                emitTrailingCommentsOfPosition(node.initializer.pos);
+                emit(node.initializer);
+            }
+            // Return true if identifier resolves to an exported member of a namespace
+            function isNamespaceExportReference(node) {
+                var container = resolver.getReferencedExportContainer(node);
+                return container && container.kind !== 256 /* SourceFile */;
+            }
+            // Return true if identifier resolves to an imported identifier
+            function isImportedReference(node) {
+                var declaration = resolver.getReferencedImportDeclaration(node);
+                return declaration && (declaration.kind === 231 /* ImportClause */ || declaration.kind === 234 /* ImportSpecifier */);
+            }
+            function emitShorthandPropertyAssignment(node) {
+                // The name property of a short-hand property assignment is considered an expression position, so here
+                // we manually emit the identifier to avoid rewriting.
+                writeTextOfNode(currentText, node.name);
+                // If emitting pre-ES6 code, or if the name requires rewriting when resolved as an expression identifier,
+                // we emit a normal property assignment. For example:
+                //   module m {
+                //       export let y;
+                //   }
+                //   module m {
+                //       let obj = { y };
+                //   }
+                // Here we need to emit obj = { y : m.y } regardless of the output target.
+                // The same rules apply for imported identifiers when targeting module formats with indirect access to
+                // the imported identifiers. For example, when targeting CommonJS:
+                //
+                //   import {foo} from './foo';
+                //   export const baz = { foo };
+                //
+                // Must be transformed into:
+                //
+                //   const foo_1 = require('./foo');
+                //   exports.baz = { foo: foo_1.foo };
+                //
+                if (languageVersion < 2 /* ES6 */ || (modulekind !== ts.ModuleKind.ES6 && isImportedReference(node.name)) || isNamespaceExportReference(node.name)) {
+                    // Emit identifier as an identifier
+                    write(": ");
+                    emit(node.name);
+                }
+                if (languageVersion >= 2 /* ES6 */ && node.objectAssignmentInitializer) {
+                    write(" = ");
+                    emit(node.objectAssignmentInitializer);
+                }
+            }
+            function tryEmitConstantValue(node) {
+                var constantValue = tryGetConstEnumValue(node);
+                if (constantValue !== undefined) {
+                    write(constantValue.toString());
+                    if (!compilerOptions.removeComments) {
+                        var propertyName = node.kind === 172 /* PropertyAccessExpression */ ? ts.declarationNameToString(node.name) : ts.getTextOfNode(node.argumentExpression);
+                        write(" /* " + propertyName + " */");
+                    }
+                    return true;
+                }
+                return false;
+            }
+            function tryGetConstEnumValue(node) {
+                if (compilerOptions.isolatedModules) {
+                    return undefined;
+                }
+                return node.kind === 172 /* PropertyAccessExpression */ || node.kind === 173 /* ElementAccessExpression */
+                    ? resolver.getConstantValue(node)
+                    : undefined;
+            }
+            // Returns 'true' if the code was actually indented, false otherwise.
+            // If the code is not indented, an optional valueToWriteWhenNotIndenting will be
+            // emitted instead.
+            function indentIfOnDifferentLines(parent, node1, node2, valueToWriteWhenNotIndenting) {
+                var realNodesAreOnDifferentLines = !ts.nodeIsSynthesized(parent) && !nodeEndIsOnSameLineAsNodeStart(node1, node2);
+                // Always use a newline for synthesized code if the synthesizer desires it.
+                var synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2);
+                if (realNodesAreOnDifferentLines || synthesizedNodeIsOnDifferentLine) {
+                    increaseIndent();
+                    writeLine();
+                    return true;
+                }
+                else {
+                    if (valueToWriteWhenNotIndenting) {
+                        write(valueToWriteWhenNotIndenting);
+                    }
+                    return false;
+                }
+            }
+            function emitPropertyAccess(node) {
+                if (tryEmitConstantValue(node)) {
+                    return;
+                }
+                if (languageVersion === 2 /* ES6 */ &&
+                    node.expression.kind === 95 /* SuperKeyword */ &&
+                    isInAsyncMethodWithSuperInES6(node)) {
+                    var name_28 = ts.createSynthesizedNode(9 /* StringLiteral */);
+                    name_28.text = node.name.text;
+                    emitSuperAccessInAsyncMethod(node.expression, name_28);
+                    return;
+                }
+                emit(node.expression);
+                var indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, node.dotToken);
+                // 1 .toString is a valid property access, emit a space after the literal
+                // Also emit a space if expression is a integer const enum value - it will appear in generated code as numeric literal
+                var shouldEmitSpace = false;
+                if (!indentedBeforeDot) {
+                    if (node.expression.kind === 8 /* NumericLiteral */) {
+                        // check if numeric literal was originally written with a dot
+                        var text = ts.getTextOfNodeFromSourceText(currentText, node.expression);
+                        shouldEmitSpace = text.indexOf(ts.tokenToString(21 /* DotToken */)) < 0;
+                    }
+                    else {
+                        // check if constant enum value is integer
+                        var constantValue = tryGetConstEnumValue(node.expression);
+                        // isFinite handles cases when constantValue is undefined
+                        shouldEmitSpace = isFinite(constantValue) && Math.floor(constantValue) === constantValue;
+                    }
+                }
+                if (shouldEmitSpace) {
+                    write(" .");
+                }
+                else {
+                    write(".");
+                }
+                var indentedAfterDot = indentIfOnDifferentLines(node, node.dotToken, node.name);
+                emit(node.name);
+                decreaseIndentIf(indentedBeforeDot, indentedAfterDot);
+            }
+            function emitQualifiedName(node) {
+                emit(node.left);
+                write(".");
+                emit(node.right);
+            }
+            function emitQualifiedNameAsExpression(node, useFallback) {
+                if (node.left.kind === 69 /* Identifier */) {
+                    emitEntityNameAsExpression(node.left, useFallback);
+                }
+                else if (useFallback) {
+                    var temp = createAndRecordTempVariable(0 /* Auto */);
+                    write("(");
+                    emitNodeWithoutSourceMap(temp);
+                    write(" = ");
+                    emitEntityNameAsExpression(node.left, /*useFallback*/ true);
+                    write(") && ");
+                    emitNodeWithoutSourceMap(temp);
+                }
+                else {
+                    emitEntityNameAsExpression(node.left, /*useFallback*/ false);
+                }
+                write(".");
+                emit(node.right);
+            }
+            function emitEntityNameAsExpression(node, useFallback) {
+                switch (node.kind) {
+                    case 69 /* Identifier */:
+                        if (useFallback) {
+                            write("typeof ");
+                            emitExpressionIdentifier(node);
+                            write(" !== 'undefined' && ");
+                        }
+                        emitExpressionIdentifier(node);
+                        break;
+                    case 139 /* QualifiedName */:
+                        emitQualifiedNameAsExpression(node, useFallback);
+                        break;
+                    default:
+                        emitNodeWithoutSourceMap(node);
+                        break;
+                }
+            }
+            function emitIndexedAccess(node) {
+                if (tryEmitConstantValue(node)) {
+                    return;
+                }
+                if (languageVersion === 2 /* ES6 */ &&
+                    node.expression.kind === 95 /* SuperKeyword */ &&
+                    isInAsyncMethodWithSuperInES6(node)) {
+                    emitSuperAccessInAsyncMethod(node.expression, node.argumentExpression);
+                    return;
+                }
+                emit(node.expression);
+                write("[");
+                emit(node.argumentExpression);
+                write("]");
+            }
+            function hasSpreadElement(elements) {
+                return ts.forEach(elements, function (e) { return e.kind === 191 /* SpreadElementExpression */; });
+            }
+            function skipParentheses(node) {
+                while (node.kind === 178 /* ParenthesizedExpression */ ||
+                    node.kind === 177 /* TypeAssertionExpression */ ||
+                    node.kind === 195 /* AsExpression */ ||
+                    node.kind === 196 /* NonNullExpression */) {
+                    node = node.expression;
+                }
+                return node;
+            }
+            function emitCallTarget(node) {
+                if (node.kind === 69 /* Identifier */ || node.kind === 97 /* ThisKeyword */ || node.kind === 95 /* SuperKeyword */) {
+                    emit(node);
+                    return node;
+                }
+                var temp = createAndRecordTempVariable(0 /* Auto */);
+                write("(");
+                emit(temp);
+                write(" = ");
+                emit(node);
+                write(")");
+                return temp;
+            }
+            function emitCallWithSpread(node) {
+                var target;
+                var expr = skipParentheses(node.expression);
+                if (expr.kind === 172 /* PropertyAccessExpression */) {
+                    // Target will be emitted as "this" argument
+                    target = emitCallTarget(expr.expression);
+                    write(".");
+                    emit(expr.name);
+                }
+                else if (expr.kind === 173 /* ElementAccessExpression */) {
+                    // Target will be emitted as "this" argument
+                    target = emitCallTarget(expr.expression);
+                    write("[");
+                    emit(expr.argumentExpression);
+                    write("]");
+                }
+                else if (expr.kind === 95 /* SuperKeyword */) {
+                    target = expr;
+                    write("_super");
+                }
+                else {
+                    emit(node.expression);
+                }
+                write(".apply(");
+                if (target) {
+                    if (target.kind === 95 /* SuperKeyword */) {
+                        // Calls of form super(...) and super.foo(...)
+                        emitThis(target);
+                    }
+                    else {
+                        // Calls of form obj.foo(...)
+                        emit(target);
+                    }
+                }
+                else {
+                    // Calls of form foo(...)
+                    write("void 0");
+                }
+                write(", ");
+                emitListWithSpread(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*trailingComma*/ false, /*useConcat*/ true);
+                write(")");
+            }
+            function isInAsyncMethodWithSuperInES6(node) {
+                if (languageVersion === 2 /* ES6 */) {
+                    var container = ts.getSuperContainer(node, /*includeFunctions*/ false);
+                    if (container && resolver.getNodeCheckFlags(container) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function emitSuperAccessInAsyncMethod(superNode, argumentExpression) {
+                var container = ts.getSuperContainer(superNode, /*includeFunctions*/ false);
+                var isSuperBinding = resolver.getNodeCheckFlags(container) & 4096 /* AsyncMethodWithSuperBinding */;
+                write("_super(");
+                emit(argumentExpression);
+                write(isSuperBinding ? ").value" : ")");
+            }
+            function emitCallExpression(node) {
+                if (languageVersion < 2 /* ES6 */ && hasSpreadElement(node.arguments)) {
+                    emitCallWithSpread(node);
+                    return;
+                }
+                var expression = node.expression;
+                var superCall = false;
+                var isAsyncMethodWithSuper = false;
+                if (expression.kind === 95 /* SuperKeyword */) {
+                    emitSuper(expression);
+                    superCall = true;
+                }
+                else {
+                    superCall = ts.isSuperPropertyOrElementAccess(expression);
+                    isAsyncMethodWithSuper = superCall && isInAsyncMethodWithSuperInES6(node);
+                    emit(expression);
+                }
+                if (superCall && (languageVersion < 2 /* ES6 */ || isAsyncMethodWithSuper)) {
+                    write(".call(");
+                    emitThis(expression);
+                    if (node.arguments.length) {
+                        write(", ");
+                        emitCommaList(node.arguments);
+                    }
+                    write(")");
+                }
+                else {
+                    write("(");
+                    emitCommaList(node.arguments);
+                    write(")");
+                }
+            }
+            function emitNewExpression(node) {
+                write("new ");
+                // Spread operator logic is supported in new expressions in ES5 using a combination
+                // of Function.prototype.bind() and Function.prototype.apply().
+                //
+                //     Example:
+                //
+                //         var args = [1, 2, 3, 4, 5];
+                //         new Array(...args);
+                //
+                //     is compiled into the following ES5:
+                //
+                //         var args = [1, 2, 3, 4, 5];
+                //         new (Array.bind.apply(Array, [void 0].concat(args)));
+                //
+                // The 'thisArg' to 'bind' is ignored when invoking the result of 'bind' with 'new',
+                // Thus, we set it to undefined ('void 0').
+                if (languageVersion === 1 /* ES5 */ &&
+                    node.arguments &&
+                    hasSpreadElement(node.arguments)) {
+                    write("(");
+                    var target = emitCallTarget(node.expression);
+                    write(".bind.apply(");
+                    emit(target);
+                    write(", [void 0].concat(");
+                    emitListWithSpread(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*trailingComma*/ false, /*useConcat*/ false);
+                    write(")))");
+                    write("()");
+                }
+                else {
+                    emit(node.expression);
+                    if (node.arguments) {
+                        write("(");
+                        emitCommaList(node.arguments);
+                        write(")");
+                    }
+                }
+            }
+            function emitTaggedTemplateExpression(node) {
+                if (languageVersion >= 2 /* ES6 */) {
+                    emit(node.tag);
+                    write(" ");
+                    emit(node.template);
+                }
+                else {
+                    emitDownlevelTaggedTemplate(node);
+                }
+            }
+            function emitParenExpression(node) {
+                // If the node is synthesized, it means the emitter put the parentheses there,
+                // not the user. If we didn't want them, the emitter would not have put them
+                // there.
+                if (!ts.nodeIsSynthesized(node) && node.parent.kind !== 180 /* ArrowFunction */) {
+                    if (node.expression.kind === 177 /* TypeAssertionExpression */ ||
+                        node.expression.kind === 195 /* AsExpression */ ||
+                        node.expression.kind === 196 /* NonNullExpression */) {
+                        var operand = node.expression.expression;
+                        // Make sure we consider all nested cast expressions, e.g.:
+                        // (<any><number><any>-A).x;
+                        while (operand.kind === 177 /* TypeAssertionExpression */ ||
+                            operand.kind === 195 /* AsExpression */ ||
+                            operand.kind === 196 /* NonNullExpression */) {
+                            operand = operand.expression;
+                        }
+                        // We have an expression of the form: (<Type>SubExpr)
+                        // Emitting this as (SubExpr) is really not desirable. We would like to emit the subexpr as is.
+                        // Omitting the parentheses, however, could cause change in the semantics of the generated
+                        // code if the casted expression has a lower precedence than the rest of the expression, e.g.:
+                        //      (<any>new A).foo should be emitted as (new A).foo and not new A.foo
+                        //      (<any>typeof A).toString() should be emitted as (typeof A).toString() and not typeof A.toString()
+                        //      new (<any>A()) should be emitted as new (A()) and not new A()
+                        //      (<any>function foo() { })() should be emitted as an IIF (function foo(){})() and not declaration function foo(){} ()
+                        if (operand.kind !== 185 /* PrefixUnaryExpression */ &&
+                            operand.kind !== 183 /* VoidExpression */ &&
+                            operand.kind !== 182 /* TypeOfExpression */ &&
+                            operand.kind !== 181 /* DeleteExpression */ &&
+                            operand.kind !== 186 /* PostfixUnaryExpression */ &&
+                            operand.kind !== 175 /* NewExpression */ &&
+                            !(operand.kind === 174 /* CallExpression */ && node.parent.kind === 175 /* NewExpression */) &&
+                            !(operand.kind === 179 /* FunctionExpression */ && node.parent.kind === 174 /* CallExpression */) &&
+                            !(operand.kind === 8 /* NumericLiteral */ && node.parent.kind === 172 /* PropertyAccessExpression */)) {
+                            emit(operand);
+                            return;
+                        }
+                    }
+                }
+                write("(");
+                emit(node.expression);
+                write(")");
+            }
+            function emitDeleteExpression(node) {
+                write(ts.tokenToString(78 /* DeleteKeyword */));
+                write(" ");
+                emit(node.expression);
+            }
+            function emitVoidExpression(node) {
+                write(ts.tokenToString(103 /* VoidKeyword */));
+                write(" ");
+                emit(node.expression);
+            }
+            function emitTypeOfExpression(node) {
+                write(ts.tokenToString(101 /* TypeOfKeyword */));
+                write(" ");
+                emit(node.expression);
+            }
+            function isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node) {
+                if (!isCurrentFileSystemExternalModule() || node.kind !== 69 /* Identifier */ || ts.nodeIsSynthesized(node)) {
+                    return false;
+                }
+                var isVariableDeclarationOrBindingElement = node.parent && (node.parent.kind === 218 /* VariableDeclaration */ || node.parent.kind === 169 /* BindingElement */);
+                var targetDeclaration = isVariableDeclarationOrBindingElement
+                    ? node.parent
+                    : resolver.getReferencedValueDeclaration(node);
+                return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, /*isExported*/ true);
+            }
+            function isNameOfExportedDeclarationInNonES6Module(node) {
+                if (modulekind === ts.ModuleKind.System || node.kind !== 69 /* Identifier */ || ts.nodeIsSynthesized(node)) {
+                    return false;
+                }
+                return !exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, node.text);
+            }
+            function emitPrefixUnaryExpression(node) {
+                var isPlusPlusOrMinusMinus = (node.operator === 41 /* PlusPlusToken */
+                    || node.operator === 42 /* MinusMinusToken */);
+                var externalExportChanged = isPlusPlusOrMinusMinus &&
+                    isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
+                if (externalExportChanged) {
+                    // emit
+                    // ++x
+                    // as
+                    // exports('x', ++x)
+                    write(exportFunctionForFile + "(\"");
+                    emitNodeWithoutSourceMap(node.operand);
+                    write("\", ");
+                }
+                var internalExportChanged = isPlusPlusOrMinusMinus &&
+                    isNameOfExportedDeclarationInNonES6Module(node.operand);
+                if (internalExportChanged) {
+                    emitAliasEqual(node.operand);
+                }
+                write(ts.tokenToString(node.operator));
+                // In some cases, we need to emit a space between the operator and the operand. One obvious case
+                // is when the operator is an identifier, like delete or typeof. We also need to do this for plus
+                // and minus expressions in certain cases. Specifically, consider the following two cases (parens
+                // are just for clarity of exposition, and not part of the source code):
+                //
+                //  (+(+1))
+                //  (+(++1))
+                //
+                // We need to emit a space in both cases. In the first case, the absence of a space will make
+                // the resulting expression a prefix increment operation. And in the second, it will make the resulting
+                // expression a prefix increment whose operand is a plus expression - (++(+x))
+                // The same is true of minus of course.
+                if (node.operand.kind === 185 /* PrefixUnaryExpression */) {
+                    var operand = node.operand;
+                    if (node.operator === 35 /* PlusToken */ && (operand.operator === 35 /* PlusToken */ || operand.operator === 41 /* PlusPlusToken */)) {
+                        write(" ");
+                    }
+                    else if (node.operator === 36 /* MinusToken */ && (operand.operator === 36 /* MinusToken */ || operand.operator === 42 /* MinusMinusToken */)) {
+                        write(" ");
+                    }
+                }
+                emit(node.operand);
+                if (externalExportChanged) {
+                    write(")");
+                }
+            }
+            function emitPostfixUnaryExpression(node) {
+                var externalExportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
+                var internalExportChanged = isNameOfExportedDeclarationInNonES6Module(node.operand);
+                if (externalExportChanged) {
+                    // export function returns the value that was passes as the second argument
+                    // however for postfix unary expressions result value should be the value before modification.
+                    // emit 'x++' as '(export('x', ++x) - 1)' and 'x--' as '(export('x', --x) + 1)'
+                    write("(" + exportFunctionForFile + "(\"");
+                    emitNodeWithoutSourceMap(node.operand);
+                    write("\", ");
+                    write(ts.tokenToString(node.operator));
+                    emit(node.operand);
+                    if (node.operator === 41 /* PlusPlusToken */) {
+                        write(") - 1)");
+                    }
+                    else {
+                        write(") + 1)");
+                    }
+                }
+                else if (internalExportChanged) {
+                    emitAliasEqual(node.operand);
+                    emit(node.operand);
+                    if (node.operator === 41 /* PlusPlusToken */) {
+                        write(" += 1");
+                    }
+                    else {
+                        write(" -= 1");
+                    }
+                }
+                else {
+                    emit(node.operand);
+                    write(ts.tokenToString(node.operator));
+                }
+            }
+            function shouldHoistDeclarationInSystemJsModule(node) {
+                return isSourceFileLevelDeclarationInSystemJsModule(node, /*isExported*/ false);
+            }
+            /*
+             * Checks if given node is a source file level declaration (not nested in module/function).
+             * If 'isExported' is true - then declaration must also be exported.
+             * This function is used in two cases:
+             * - check if node is a exported source file level value to determine
+             *   if we should also export the value after its it changed
+             * - check if node is a source level declaration to emit it differently,
+             *   i.e non-exported variable statement 'var x = 1' is hoisted so
+             *   we we emit variable statement 'var' should be dropped.
+             */
+            function isSourceFileLevelDeclarationInSystemJsModule(node, isExported) {
+                if (!node || !isCurrentFileSystemExternalModule()) {
+                    return false;
+                }
+                var current = ts.getRootDeclaration(node).parent;
+                while (current) {
+                    if (current.kind === 256 /* SourceFile */) {
+                        return !isExported || ((ts.getCombinedNodeFlags(node) & 1 /* Export */) !== 0);
+                    }
+                    else if (ts.isDeclaration(current)) {
+                        return false;
+                    }
+                    else {
+                        current = current.parent;
+                    }
+                }
+            }
+            /**
+             * Emit ES7 exponentiation operator downlevel using Math.pow
+             * @param node a binary expression node containing exponentiationOperator (**, **=)
+             */
+            function emitExponentiationOperator(node) {
+                var leftHandSideExpression = node.left;
+                if (node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) {
+                    var synthesizedLHS = void 0;
+                    var shouldEmitParentheses = false;
+                    if (ts.isElementAccessExpression(leftHandSideExpression)) {
+                        shouldEmitParentheses = true;
+                        write("(");
+                        synthesizedLHS = ts.createSynthesizedNode(173 /* ElementAccessExpression */, /*startsOnNewLine*/ false);
+                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, /*canDefineTempVariablesInPlace*/ false, /*shouldEmitCommaBeforeAssignment*/ false);
+                        synthesizedLHS.expression = identifier;
+                        if (leftHandSideExpression.argumentExpression.kind !== 8 /* NumericLiteral */ &&
+                            leftHandSideExpression.argumentExpression.kind !== 9 /* StringLiteral */) {
+                            var tempArgumentExpression = createAndRecordTempVariable(268435456 /* _i */);
+                            synthesizedLHS.argumentExpression = tempArgumentExpression;
+                            emitAssignment(tempArgumentExpression, leftHandSideExpression.argumentExpression, /*shouldEmitCommaBeforeAssignment*/ true, leftHandSideExpression.expression);
+                        }
+                        else {
+                            synthesizedLHS.argumentExpression = leftHandSideExpression.argumentExpression;
+                        }
+                        write(", ");
+                    }
+                    else if (ts.isPropertyAccessExpression(leftHandSideExpression)) {
+                        shouldEmitParentheses = true;
+                        write("(");
+                        synthesizedLHS = ts.createSynthesizedNode(172 /* PropertyAccessExpression */, /*startsOnNewLine*/ false);
+                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, /*canDefineTempVariablesInPlace*/ false, /*shouldEmitCommaBeforeAssignment*/ false);
+                        synthesizedLHS.expression = identifier;
+                        synthesizedLHS.dotToken = leftHandSideExpression.dotToken;
+                        synthesizedLHS.name = leftHandSideExpression.name;
+                        write(", ");
+                    }
+                    emit(synthesizedLHS || leftHandSideExpression);
+                    write(" = ");
+                    write("Math.pow(");
+                    emit(synthesizedLHS || leftHandSideExpression);
+                    write(", ");
+                    emit(node.right);
+                    write(")");
+                    if (shouldEmitParentheses) {
+                        write(")");
+                    }
+                }
+                else {
+                    write("Math.pow(");
+                    emit(leftHandSideExpression);
+                    write(", ");
+                    emit(node.right);
+                    write(")");
+                }
+            }
+            function emitAliasEqual(name) {
+                for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
+                    var specifier = _b[_a];
+                    emitStart(specifier.name);
+                    emitContainingModuleName(specifier);
+                    if (languageVersion === 0 /* ES3 */ && name.text === "default") {
+                        write('["default"]');
+                    }
+                    else {
+                        write(".");
+                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                    }
+                    emitEnd(specifier.name);
+                    write(" = ");
+                }
+                return true;
+            }
+            function emitBinaryExpression(node) {
+                if (languageVersion < 2 /* ES6 */ && node.operatorToken.kind === 56 /* EqualsToken */ &&
+                    (node.left.kind === 171 /* ObjectLiteralExpression */ || node.left.kind === 170 /* ArrayLiteralExpression */)) {
+                    emitDestructuring(node, node.parent.kind === 202 /* ExpressionStatement */);
+                }
+                else {
+                    var isAssignment = ts.isAssignmentOperator(node.operatorToken.kind);
+                    var externalExportChanged = isAssignment &&
+                        isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left);
+                    if (externalExportChanged) {
+                        // emit assignment 'x <op> y' as 'exports("x", x <op> y)'
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithoutSourceMap(node.left);
+                        write("\", ");
+                    }
+                    var internalExportChanged = isAssignment &&
+                        isNameOfExportedDeclarationInNonES6Module(node.left);
+                    if (internalExportChanged) {
+                        // export { foo }
+                        // emit foo = 2 as exports.foo = foo = 2
+                        emitAliasEqual(node.left);
+                    }
+                    if (node.operatorToken.kind === 38 /* AsteriskAsteriskToken */ || node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) {
+                        // Downleveled emit exponentiation operator using Math.pow
+                        emitExponentiationOperator(node);
+                    }
+                    else {
+                        emit(node.left);
+                        // Add indentation before emit the operator if the operator is on different line
+                        // For example:
+                        //      3
+                        //      + 2;
+                        //   emitted as
+                        //      3
+                        //          + 2;
+                        var indentedBeforeOperator = indentIfOnDifferentLines(node, node.left, node.operatorToken, node.operatorToken.kind !== 24 /* CommaToken */ ? " " : undefined);
+                        write(ts.tokenToString(node.operatorToken.kind));
+                        var indentedAfterOperator = indentIfOnDifferentLines(node, node.operatorToken, node.right, " ");
+                        emit(node.right);
+                        decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator);
+                    }
+                    if (externalExportChanged) {
+                        write(")");
+                    }
+                }
+            }
+            function synthesizedNodeStartsOnNewLine(node) {
+                return ts.nodeIsSynthesized(node) && node.startsOnNewLine;
+            }
+            function emitConditionalExpression(node) {
+                emit(node.condition);
+                var indentedBeforeQuestion = indentIfOnDifferentLines(node, node.condition, node.questionToken, " ");
+                write("?");
+                var indentedAfterQuestion = indentIfOnDifferentLines(node, node.questionToken, node.whenTrue, " ");
+                emit(node.whenTrue);
+                decreaseIndentIf(indentedBeforeQuestion, indentedAfterQuestion);
+                var indentedBeforeColon = indentIfOnDifferentLines(node, node.whenTrue, node.colonToken, " ");
+                write(":");
+                var indentedAfterColon = indentIfOnDifferentLines(node, node.colonToken, node.whenFalse, " ");
+                emit(node.whenFalse);
+                decreaseIndentIf(indentedBeforeColon, indentedAfterColon);
+            }
+            // Helper function to decrease the indent if we previously indented.  Allows multiple
+            // previous indent values to be considered at a time.  This also allows caller to just
+            // call this once, passing in all their appropriate indent values, instead of needing
+            // to call this helper function multiple times.
+            function decreaseIndentIf(value1, value2) {
+                if (value1) {
+                    decreaseIndent();
+                }
+                if (value2) {
+                    decreaseIndent();
+                }
+            }
+            function isSingleLineEmptyBlock(node) {
+                if (node && node.kind === 199 /* Block */) {
+                    var block = node;
+                    return block.statements.length === 0 && nodeEndIsOnSameLineAsNodeStart(block, block);
+                }
+            }
+            function emitBlock(node) {
+                if (isSingleLineEmptyBlock(node)) {
+                    emitToken(15 /* OpenBraceToken */, node.pos);
+                    write(" ");
+                    emitToken(16 /* CloseBraceToken */, node.statements.end);
+                    return;
+                }
+                emitToken(15 /* OpenBraceToken */, node.pos);
+                increaseIndent();
+                if (node.kind === 226 /* ModuleBlock */) {
+                    ts.Debug.assert(node.parent.kind === 225 /* ModuleDeclaration */);
+                    emitCaptureThisForNodeIfNecessary(node.parent);
+                }
+                emitLines(node.statements);
+                if (node.kind === 226 /* ModuleBlock */) {
+                    emitTempDeclarations(/*newLine*/ true);
+                }
+                decreaseIndent();
+                writeLine();
+                emitToken(16 /* CloseBraceToken */, node.statements.end);
+            }
+            function emitEmbeddedStatement(node) {
+                if (node.kind === 199 /* Block */) {
+                    write(" ");
+                    emit(node);
+                }
+                else {
+                    increaseIndent();
+                    writeLine();
+                    emit(node);
+                    decreaseIndent();
+                }
+            }
+            function emitExpressionStatement(node) {
+                emitParenthesizedIf(node.expression, /*parenthesized*/ node.expression.kind === 180 /* ArrowFunction */);
+                write(";");
+            }
+            function emitIfStatement(node) {
+                var endPos = emitToken(88 /* IfKeyword */, node.pos);
+                write(" ");
+                endPos = emitToken(17 /* OpenParenToken */, endPos);
+                emit(node.expression);
+                emitToken(18 /* CloseParenToken */, node.expression.end);
+                emitEmbeddedStatement(node.thenStatement);
+                if (node.elseStatement) {
+                    writeLine();
+                    emitToken(80 /* ElseKeyword */, node.thenStatement.end);
+                    if (node.elseStatement.kind === 203 /* IfStatement */) {
+                        write(" ");
+                        emit(node.elseStatement);
+                    }
+                    else {
+                        emitEmbeddedStatement(node.elseStatement);
+                    }
+                }
+            }
+            function emitDoStatement(node) {
+                emitLoop(node, emitDoStatementWorker);
+            }
+            function emitDoStatementWorker(node, loop) {
+                write("do");
+                if (loop) {
+                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
+                }
+                else {
+                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
+                }
+                if (node.statement.kind === 199 /* Block */) {
+                    write(" ");
+                }
+                else {
+                    writeLine();
+                }
+                write("while (");
+                emit(node.expression);
+                write(");");
+            }
+            function emitWhileStatement(node) {
+                emitLoop(node, emitWhileStatementWorker);
+            }
+            function emitWhileStatementWorker(node, loop) {
+                write("while (");
+                emit(node.expression);
+                write(")");
+                if (loop) {
+                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
+                }
+                else {
+                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
+                }
+            }
+            /**
+             * Returns true if start of variable declaration list was emitted.
+             * Returns false if nothing was written - this can happen for source file level variable declarations
+             *     in system modules where such variable declarations are hoisted.
+             */
+            function tryEmitStartOfVariableDeclarationList(decl) {
+                if (shouldHoistVariable(decl, /*checkIfSourceFileLevelDecl*/ true)) {
+                    // variables in variable declaration list were already hoisted
+                    return false;
+                }
+                if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072 /* BlockScoped */) === 0) {
+                    // we are inside a converted loop - this can only happen in downlevel scenarios
+                    // record names for all variable declarations
+                    for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) {
+                        var varDecl = _b[_a];
+                        hoistVariableDeclarationFromLoop(convertedLoopState, varDecl);
+                    }
+                    return false;
+                }
+                emitStart(decl);
+                if (decl && languageVersion >= 2 /* ES6 */) {
+                    if (ts.isLet(decl)) {
+                        write("let ");
+                    }
+                    else if (ts.isConst(decl)) {
+                        write("const ");
+                    }
+                    else {
+                        write("var ");
+                    }
+                }
+                else {
+                    write("var ");
+                }
+                // Note here we specifically dont emit end so that if we are going to emit binding pattern
+                // we can alter the source map correctly
+                return true;
+            }
+            function emitVariableDeclarationListSkippingUninitializedEntries(list) {
+                var started = false;
+                for (var _a = 0, _b = list.declarations; _a < _b.length; _a++) {
+                    var decl = _b[_a];
+                    if (!decl.initializer) {
+                        continue;
+                    }
+                    if (!started) {
+                        started = true;
+                    }
+                    else {
+                        write(", ");
+                    }
+                    emit(decl);
+                }
+                return started;
+            }
+            function shouldConvertLoopBody(node) {
+                return languageVersion < 2 /* ES6 */ &&
+                    (resolver.getNodeCheckFlags(node) & 65536 /* LoopWithCapturedBlockScopedBinding */) !== 0;
+            }
+            function emitLoop(node, loopEmitter) {
+                var shouldConvert = shouldConvertLoopBody(node);
+                if (!shouldConvert) {
+                    loopEmitter(node, /* convertedLoop*/ undefined);
+                }
+                else {
+                    var loop = convertLoopBody(node);
+                    if (node.parent.kind === 214 /* LabeledStatement */) {
+                        // if parent of the loop was labeled statement - attach the label to loop skipping converted loop body
+                        emitLabelAndColon(node.parent);
+                    }
+                    loopEmitter(node, loop);
+                }
+            }
+            function convertLoopBody(node) {
+                var functionName = makeUniqueName("_loop");
+                var loopInitializer;
+                switch (node.kind) {
+                    case 206 /* ForStatement */:
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                        var initializer = node.initializer;
+                        if (initializer && initializer.kind === 219 /* VariableDeclarationList */) {
+                            loopInitializer = node.initializer;
+                        }
+                        break;
+                }
+                var loopParameters;
+                var loopOutParameters;
+                if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3072 /* BlockScoped */)) {
+                    // if loop initializer contains block scoped variables - they should be passed to converted loop body as parameters
+                    loopParameters = [];
+                    for (var _a = 0, _b = loopInitializer.declarations; _a < _b.length; _a++) {
+                        var varDeclaration = _b[_a];
+                        processVariableDeclaration(varDeclaration.name);
+                    }
+                }
+                var bodyIsBlock = node.statement.kind === 199 /* Block */;
+                var paramList = loopParameters ? loopParameters.join(", ") : "";
+                writeLine();
+                write("var " + functionName + " = function(" + paramList + ")");
+                var convertedOuterLoopState = convertedLoopState;
+                convertedLoopState = { loopOutParameters: loopOutParameters };
+                if (convertedOuterLoopState) {
+                    // convertedOuterLoopState !== undefined means that this converted loop is nested in another converted loop.
+                    // if outer converted loop has already accumulated some state - pass it through
+                    if (convertedOuterLoopState.argumentsName) {
+                        // outer loop has already used 'arguments' so we've already have some name to alias it
+                        // use the same name in all nested loops
+                        convertedLoopState.argumentsName = convertedOuterLoopState.argumentsName;
+                    }
+                    if (convertedOuterLoopState.thisName) {
+                        // outer loop has already used 'this' so we've already have some name to alias it
+                        // use the same name in all nested loops
+                        convertedLoopState.thisName = convertedOuterLoopState.thisName;
+                    }
+                    if (convertedOuterLoopState.hoistedLocalVariables) {
+                        // we've already collected some non-block scoped variable declarations in enclosing loop
+                        // use the same storage in nested loop
+                        convertedLoopState.hoistedLocalVariables = convertedOuterLoopState.hoistedLocalVariables;
+                    }
+                }
+                write(" {");
+                writeLine();
+                increaseIndent();
+                if (bodyIsBlock) {
+                    emitLines(node.statement.statements);
+                }
+                else {
+                    emit(node.statement);
+                }
+                writeLine();
+                // end of loop body -> copy out parameter
+                copyLoopOutParameters(convertedLoopState, 1 /* ToOutParameter */, /*emitAsStatements*/ true);
+                decreaseIndent();
+                writeLine();
+                write("};");
+                writeLine();
+                if (loopOutParameters) {
+                    // declare variables to hold out params for loop body
+                    write("var ");
+                    for (var i = 0; i < loopOutParameters.length; i++) {
+                        if (i !== 0) {
+                            write(", ");
+                        }
+                        write(loopOutParameters[i].outParamName);
+                    }
+                    write(";");
+                    writeLine();
+                }
+                if (convertedLoopState.argumentsName) {
+                    // if alias for arguments is set
+                    if (convertedOuterLoopState) {
+                        // pass it to outer converted loop
+                        convertedOuterLoopState.argumentsName = convertedLoopState.argumentsName;
+                    }
+                    else {
+                        // this is top level converted loop and we need to create an alias for 'arguments' object
+                        write("var " + convertedLoopState.argumentsName + " = arguments;");
+                        writeLine();
+                    }
+                }
+                if (convertedLoopState.thisName) {
+                    // if alias for this is set
+                    if (convertedOuterLoopState) {
+                        // pass it to outer converted loop
+                        convertedOuterLoopState.thisName = convertedLoopState.thisName;
+                    }
+                    else {
+                        // this is top level converted loop so we need to create an alias for 'this' here
+                        // NOTE:
+                        // if converted loops were all nested in arrow function then we'll always emit '_this' so convertedLoopState.thisName will not be set.
+                        // If it is set this means that all nested loops are not nested in arrow function and it is safe to capture 'this'.
+                        write("var " + convertedLoopState.thisName + " = this;");
+                        writeLine();
+                    }
+                }
+                if (convertedLoopState.hoistedLocalVariables) {
+                    // if hoistedLocalVariables !== undefined this means that we've possibly collected some variable declarations to be hoisted later
+                    if (convertedOuterLoopState) {
+                        // pass them to outer converted loop
+                        convertedOuterLoopState.hoistedLocalVariables = convertedLoopState.hoistedLocalVariables;
+                    }
+                    else {
+                        // deduplicate and hoist collected variable declarations
+                        write("var ");
+                        var seen = void 0;
+                        for (var _c = 0, _d = convertedLoopState.hoistedLocalVariables; _c < _d.length; _c++) {
+                            var id = _d[_c];
+                            // Don't initialize seen unless we have at least one element.
+                            // Emit a comma to separate for all but the first element.
+                            if (!seen) {
+                                seen = {};
+                            }
+                            else {
+                                write(", ");
+                            }
+                            if (!ts.hasProperty(seen, id.text)) {
+                                emit(id);
+                                seen[id.text] = id.text;
+                            }
+                        }
+                        write(";");
+                        writeLine();
+                    }
+                }
+                var currentLoopState = convertedLoopState;
+                convertedLoopState = convertedOuterLoopState;
+                return { functionName: functionName, paramList: paramList, state: currentLoopState };
+                function processVariableDeclaration(name) {
+                    if (name.kind === 69 /* Identifier */) {
+                        var nameText = isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(name)
+                            ? getGeneratedNameForNode(name)
+                            : name.text;
+                        loopParameters.push(nameText);
+                        if (resolver.getNodeCheckFlags(name.parent) & 2097152 /* NeedsLoopOutParameter */) {
+                            var reassignedVariable = { originalName: name, outParamName: makeUniqueName("out_" + nameText) };
+                            (loopOutParameters || (loopOutParameters = [])).push(reassignedVariable);
+                        }
+                    }
+                    else {
+                        for (var _a = 0, _b = name.elements; _a < _b.length; _a++) {
+                            var element = _b[_a];
+                            processVariableDeclaration(element.name);
+                        }
+                    }
+                }
+            }
+            function emitNormalLoopBody(node, emitAsEmbeddedStatement) {
+                var saveAllowedNonLabeledJumps;
+                if (convertedLoopState) {
+                    // we get here if we are trying to emit normal loop loop inside converted loop
+                    // set allowedNonLabeledJumps to Break | Continue to mark that break\continue inside the loop should be emitted as is
+                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                    convertedLoopState.allowedNonLabeledJumps = 2 /* Break */ | 4 /* Continue */;
+                }
+                if (emitAsEmbeddedStatement) {
+                    emitEmbeddedStatement(node.statement);
+                }
+                else if (node.statement.kind === 199 /* Block */) {
+                    emitLines(node.statement.statements);
+                }
+                else {
+                    writeLine();
+                    emit(node.statement);
+                }
+                if (convertedLoopState) {
+                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
+                }
+            }
+            function copyLoopOutParameters(state, copyDirection, emitAsStatements) {
+                if (state.loopOutParameters) {
+                    for (var _a = 0, _b = state.loopOutParameters; _a < _b.length; _a++) {
+                        var outParam = _b[_a];
+                        if (copyDirection === 0 /* ToOriginal */) {
+                            emitIdentifier(outParam.originalName);
+                            write(" = " + outParam.outParamName);
+                        }
+                        else {
+                            write(outParam.outParamName + " = ");
+                            emitIdentifier(outParam.originalName);
+                        }
+                        if (emitAsStatements) {
+                            write(";");
+                            writeLine();
+                        }
+                        else {
+                            write(", ");
+                        }
+                    }
+                }
+            }
+            function emitConvertedLoopCall(loop, emitAsBlock) {
+                if (emitAsBlock) {
+                    write(" {");
+                    writeLine();
+                    increaseIndent();
+                }
+                // loop is considered simple if it does not have any return statements or break\continue that transfer control outside of the loop
+                // simple loops are emitted as just 'loop()';
+                // NOTE: if loop uses only 'continue' it still will be emitted as simple loop
+                var isSimpleLoop = !(loop.state.nonLocalJumps & ~4 /* Continue */) &&
+                    !loop.state.labeledNonLocalBreaks &&
+                    !loop.state.labeledNonLocalContinues;
+                var loopResult = makeUniqueName("state");
+                if (!isSimpleLoop) {
+                    write("var " + loopResult + " = ");
+                }
+                write(loop.functionName + "(" + loop.paramList + ");");
+                writeLine();
+                copyLoopOutParameters(loop.state, 0 /* ToOriginal */, /*emitAsStatements*/ true);
+                if (!isSimpleLoop) {
+                    // for non simple loops we need to store result returned from converted loop function and use it to do dispatching
+                    // converted loop function can return:
+                    // - object - used when body of the converted loop contains return statement. Property "value" of this object stores retuned value
+                    // - string - used to dispatch jumps. "break" and "continue" are used to non-labeled jumps, other values are used to transfer control to
+                    //   different labels
+                    writeLine();
+                    if (loop.state.nonLocalJumps & 8 /* Return */) {
+                        write("if (typeof " + loopResult + " === \"object\") ");
+                        if (convertedLoopState) {
+                            // we are currently nested in another converted loop - return unwrapped result
+                            write("return " + loopResult + ";");
+                            // propagate 'hasReturn' flag to outer loop
+                            convertedLoopState.nonLocalJumps |= 8 /* Return */;
+                        }
+                        else {
+                            // top level converted loop - return unwrapped value
+                            write("return " + loopResult + ".value;");
+                        }
+                        writeLine();
+                    }
+                    if (loop.state.nonLocalJumps & 2 /* Break */) {
+                        write("if (" + loopResult + " === \"break\") break;");
+                        writeLine();
+                    }
+                    // in case of labeled breaks emit code that either breaks to some known label inside outer loop or delegates jump decision to outer loop
+                    emitDispatchTableForLabeledJumps(loopResult, loop.state, convertedLoopState);
+                }
+                if (emitAsBlock) {
+                    writeLine();
+                    decreaseIndent();
+                    write("}");
+                }
+                function emitDispatchTableForLabeledJumps(loopResultVariable, currentLoop, outerLoop) {
+                    if (!currentLoop.labeledNonLocalBreaks && !currentLoop.labeledNonLocalContinues) {
+                        return;
+                    }
+                    write("switch(" + loopResultVariable + ") {");
+                    increaseIndent();
+                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalBreaks, /*isBreak*/ true, loopResultVariable, outerLoop);
+                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalContinues, /*isBreak*/ false, loopResultVariable, outerLoop);
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+                function emitDispatchEntriesForLabeledJumps(table, isBreak, loopResultVariable, outerLoop) {
+                    if (!table) {
+                        return;
+                    }
+                    for (var labelText in table) {
+                        var labelMarker = table[labelText];
+                        writeLine();
+                        write("case \"" + labelMarker + "\": ");
+                        // if there are no outer converted loop or outer label in question is located inside outer converted loop
+                        // then emit labeled break\continue
+                        // otherwise propagate pair 'label -> marker' to outer converted loop and emit 'return labelMarker' so outer loop can later decide what to do
+                        if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) {
+                            if (isBreak) {
+                                write("break ");
+                            }
+                            else {
+                                write("continue ");
+                            }
+                            write(labelText + ";");
+                        }
+                        else {
+                            setLabeledJump(outerLoop, isBreak, labelText, labelMarker);
+                            write("return " + loopResultVariable + ";");
+                        }
+                    }
+                }
+            }
+            function emitForStatement(node) {
+                emitLoop(node, emitForStatementWorker);
+            }
+            function emitForStatementWorker(node, loop) {
+                var endPos = emitToken(86 /* ForKeyword */, node.pos);
+                write(" ");
+                endPos = emitToken(17 /* OpenParenToken */, endPos);
+                if (node.initializer && node.initializer.kind === 219 /* VariableDeclarationList */) {
+                    var variableDeclarationList = node.initializer;
+                    var startIsEmitted = tryEmitStartOfVariableDeclarationList(variableDeclarationList);
+                    if (startIsEmitted) {
+                        emitCommaList(variableDeclarationList.declarations);
+                    }
+                    else {
+                        emitVariableDeclarationListSkippingUninitializedEntries(variableDeclarationList);
+                    }
+                }
+                else if (node.initializer) {
+                    emit(node.initializer);
+                }
+                write(";");
+                emitOptional(" ", node.condition);
+                write(";");
+                emitOptional(" ", node.incrementor);
+                write(")");
+                if (loop) {
+                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
+                }
+                else {
+                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
+                }
+            }
+            function emitForInOrForOfStatement(node) {
+                if (languageVersion < 2 /* ES6 */ && node.kind === 208 /* ForOfStatement */) {
+                    emitLoop(node, emitDownLevelForOfStatementWorker);
+                }
+                else {
+                    emitLoop(node, emitForInOrForOfStatementWorker);
+                }
+            }
+            function emitForInOrForOfStatementWorker(node, loop) {
+                var endPos = emitToken(86 /* ForKeyword */, node.pos);
+                write(" ");
+                endPos = emitToken(17 /* OpenParenToken */, endPos);
+                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
+                    var variableDeclarationList = node.initializer;
+                    if (variableDeclarationList.declarations.length >= 1) {
+                        tryEmitStartOfVariableDeclarationList(variableDeclarationList);
+                        emit(variableDeclarationList.declarations[0]);
+                    }
+                }
+                else {
+                    emit(node.initializer);
+                }
+                if (node.kind === 207 /* ForInStatement */) {
+                    write(" in ");
+                }
+                else {
+                    write(" of ");
+                }
+                emit(node.expression);
+                emitToken(18 /* CloseParenToken */, node.expression.end);
+                if (loop) {
+                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
+                }
+                else {
+                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
+                }
+            }
+            function emitDownLevelForOfStatementWorker(node, loop) {
+                // The following ES6 code:
+                //
+                //    for (let v of expr) { }
+                //
+                // should be emitted as
+                //
+                //    for (let _i = 0, _a = expr; _i < _a.length; _i++) {
+                //        let v = _a[_i];
+                //    }
+                //
+                // where _a and _i are temps emitted to capture the RHS and the counter,
+                // respectively.
+                // When the left hand side is an expression instead of a let declaration,
+                // the "let v" is not emitted.
+                // When the left hand side is a let/const, the v is renamed if there is
+                // another v in scope.
+                // Note that all assignments to the LHS are emitted in the body, including
+                // all destructuring.
+                // Note also that because an extra statement is needed to assign to the LHS,
+                // for-of bodies are always emitted as blocks.
+                var endPos = emitToken(86 /* ForKeyword */, node.pos);
+                write(" ");
+                endPos = emitToken(17 /* OpenParenToken */, endPos);
+                // Do not emit the LHS let declaration yet, because it might contain destructuring.
+                // Do not call recordTempDeclaration because we are declaring the temps
+                // right here. Recording means they will be declared later.
+                // In the case where the user wrote an identifier as the RHS, like this:
+                //
+                //     for (let v of arr) { }
+                //
+                // we can't reuse 'arr' because it might be modified within the body of the loop.
+                var counter = createTempVariable(268435456 /* _i */);
+                var rhsReference = ts.createSynthesizedNode(69 /* Identifier */);
+                rhsReference.text = node.expression.kind === 69 /* Identifier */ ?
+                    makeUniqueName(node.expression.text) :
+                    makeTempVariableName(0 /* Auto */);
+                // This is the let keyword for the counter and rhsReference. The let keyword for
+                // the LHS will be emitted inside the body.
+                emitStart(node.expression);
+                write("var ");
+                // _i = 0
+                emitNodeWithoutSourceMap(counter);
+                write(" = 0");
+                emitEnd(node.expression);
+                // , _a = expr
+                write(", ");
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(rhsReference);
+                write(" = ");
+                emitNodeWithoutSourceMap(node.expression);
+                emitEnd(node.expression);
+                write("; ");
+                // _i < _a.length;
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(counter);
+                write(" < ");
+                emitNodeWithCommentsAndWithoutSourcemap(rhsReference);
+                write(".length");
+                emitEnd(node.expression);
+                write("; ");
+                // _i++)
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(counter);
+                write("++");
+                emitEnd(node.expression);
+                emitToken(18 /* CloseParenToken */, node.expression.end);
+                // Body
+                write(" {");
+                writeLine();
+                increaseIndent();
+                // Initialize LHS
+                // let v = _a[_i];
+                var rhsIterationValue = createElementAccessExpression(rhsReference, counter);
+                emitStart(node.initializer);
+                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
+                    write("var ");
+                    var variableDeclarationList = node.initializer;
+                    if (variableDeclarationList.declarations.length > 0) {
+                        var declaration = variableDeclarationList.declarations[0];
+                        if (ts.isBindingPattern(declaration.name)) {
+                            // This works whether the declaration is a var, let, or const.
+                            // It will use rhsIterationValue _a[_i] as the initializer.
+                            emitDestructuring(declaration, /*isAssignmentExpressionStatement*/ false, rhsIterationValue);
+                        }
+                        else {
+                            // The following call does not include the initializer, so we have
+                            // to emit it separately.
+                            emitNodeWithCommentsAndWithoutSourcemap(declaration);
+                            write(" = ");
+                            emitNodeWithoutSourceMap(rhsIterationValue);
+                        }
+                    }
+                    else {
+                        // It's an empty declaration list. This can only happen in an error case, if the user wrote
+                        //     for (let of []) {}
+                        emitNodeWithoutSourceMap(createTempVariable(0 /* Auto */));
+                        write(" = ");
+                        emitNodeWithoutSourceMap(rhsIterationValue);
+                    }
+                }
+                else {
+                    // Initializer is an expression. Emit the expression in the body, so that it's
+                    // evaluated on every iteration.
+                    var assignmentExpression = createBinaryExpression(node.initializer, 56 /* EqualsToken */, rhsIterationValue, /*startsOnNewLine*/ false);
+                    if (node.initializer.kind === 170 /* ArrayLiteralExpression */ || node.initializer.kind === 171 /* ObjectLiteralExpression */) {
+                        // This is a destructuring pattern, so call emitDestructuring instead of emit. Calling emit will not work, because it will cause
+                        // the BinaryExpression to be passed in instead of the expression statement, which will cause emitDestructuring to crash.
+                        emitDestructuring(assignmentExpression, /*isAssignmentExpressionStatement*/ true, /*value*/ undefined);
+                    }
+                    else {
+                        emitNodeWithCommentsAndWithoutSourcemap(assignmentExpression);
+                    }
+                }
+                emitEnd(node.initializer);
+                write(";");
+                if (loop) {
+                    writeLine();
+                    emitConvertedLoopCall(loop, /*emitAsBlock*/ false);
+                }
+                else {
+                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ false);
+                }
+                writeLine();
+                decreaseIndent();
+                write("}");
+            }
+            function emitBreakOrContinueStatement(node) {
+                if (convertedLoopState) {
+                    // check if we can emit break\continue as is
+                    // it is possible if either
+                    //   - break\continue is statement labeled and label is located inside the converted loop
+                    //   - break\continue is non-labeled and located in non-converted loop\switch statement
+                    var jump = node.kind === 210 /* BreakStatement */ ? 2 /* Break */ : 4 /* Continue */;
+                    var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) ||
+                        (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
+                    if (!canUseBreakOrContinue) {
+                        write("return ");
+                        // explicit exit from loop -> copy out parameters
+                        copyLoopOutParameters(convertedLoopState, 1 /* ToOutParameter */, /*emitAsStatements*/ false);
+                        if (!node.label) {
+                            if (node.kind === 210 /* BreakStatement */) {
+                                convertedLoopState.nonLocalJumps |= 2 /* Break */;
+                                write("\"break\";");
+                            }
+                            else {
+                                convertedLoopState.nonLocalJumps |= 4 /* Continue */;
+                                // note: return value is emitted only to simplify debugging, call to converted loop body does not do any dispatching on it.
+                                write("\"continue\";");
+                            }
+                        }
+                        else {
+                            var labelMarker = void 0;
+                            if (node.kind === 210 /* BreakStatement */) {
+                                labelMarker = "break-" + node.label.text;
+                                setLabeledJump(convertedLoopState, /*isBreak*/ true, node.label.text, labelMarker);
+                            }
+                            else {
+                                labelMarker = "continue-" + node.label.text;
+                                setLabeledJump(convertedLoopState, /*isBreak*/ false, node.label.text, labelMarker);
+                            }
+                            write("\"" + labelMarker + "\";");
+                        }
+                        return;
+                    }
+                }
+                emitToken(node.kind === 210 /* BreakStatement */ ? 70 /* BreakKeyword */ : 75 /* ContinueKeyword */, node.pos);
+                emitOptional(" ", node.label);
+                write(";");
+            }
+            function emitReturnStatement(node) {
+                if (convertedLoopState) {
+                    convertedLoopState.nonLocalJumps |= 8 /* Return */;
+                    write("return { value: ");
+                    if (node.expression) {
+                        emit(node.expression);
+                    }
+                    else {
+                        write("void 0");
+                    }
+                    write(" };");
+                    return;
+                }
+                emitToken(94 /* ReturnKeyword */, node.pos);
+                emitOptional(" ", node.expression);
+                write(";");
+            }
+            function emitWithStatement(node) {
+                write("with (");
+                emit(node.expression);
+                write(")");
+                emitEmbeddedStatement(node.statement);
+            }
+            function emitSwitchStatement(node) {
+                var endPos = emitToken(96 /* SwitchKeyword */, node.pos);
+                write(" ");
+                emitToken(17 /* OpenParenToken */, endPos);
+                emit(node.expression);
+                endPos = emitToken(18 /* CloseParenToken */, node.expression.end);
+                write(" ");
+                var saveAllowedNonLabeledJumps;
+                if (convertedLoopState) {
+                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                    // for switch statement allow only non-labeled break
+                    convertedLoopState.allowedNonLabeledJumps |= 2 /* Break */;
+                }
+                emitCaseBlock(node.caseBlock, endPos);
+                if (convertedLoopState) {
+                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
+                }
+            }
+            function emitCaseBlock(node, startPos) {
+                emitToken(15 /* OpenBraceToken */, startPos);
+                increaseIndent();
+                emitLines(node.clauses);
+                decreaseIndent();
+                writeLine();
+                emitToken(16 /* CloseBraceToken */, node.clauses.end);
+            }
+            function nodeStartPositionsAreOnSameLine(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node1.pos)) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
+            }
+            function nodeEndPositionsAreOnSameLine(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, node2.end);
+            }
+            function nodeEndIsOnSameLineAsNodeStart(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
+            }
+            function emitCaseOrDefaultClause(node) {
+                if (node.kind === 249 /* CaseClause */) {
+                    write("case ");
+                    emit(node.expression);
+                    write(":");
+                }
+                else {
+                    write("default:");
+                }
+                if (node.statements.length === 1 && nodeStartPositionsAreOnSameLine(node, node.statements[0])) {
+                    write(" ");
+                    emit(node.statements[0]);
+                }
+                else {
+                    increaseIndent();
+                    emitLines(node.statements);
+                    decreaseIndent();
+                }
+            }
+            function emitThrowStatement(node) {
+                write("throw ");
+                emit(node.expression);
+                write(";");
+            }
+            function emitTryStatement(node) {
+                write("try ");
+                emit(node.tryBlock);
+                emit(node.catchClause);
+                if (node.finallyBlock) {
+                    writeLine();
+                    write("finally ");
+                    emit(node.finallyBlock);
+                }
+            }
+            function emitCatchClause(node) {
+                writeLine();
+                var endPos = emitToken(72 /* CatchKeyword */, node.pos);
+                write(" ");
+                emitToken(17 /* OpenParenToken */, endPos);
+                emit(node.variableDeclaration);
+                emitToken(18 /* CloseParenToken */, node.variableDeclaration ? node.variableDeclaration.end : endPos);
+                write(" ");
+                emitBlock(node.block);
+            }
+            function emitDebuggerStatement(node) {
+                emitToken(76 /* DebuggerKeyword */, node.pos);
+                write(";");
+            }
+            function emitLabelAndColon(node) {
+                emit(node.label);
+                write(": ");
+            }
+            function emitLabeledStatement(node) {
+                if (!ts.isIterationStatement(node.statement, /* lookInLabeledStatements */ false) || !shouldConvertLoopBody(node.statement)) {
+                    emitLabelAndColon(node);
+                }
+                if (convertedLoopState) {
+                    if (!convertedLoopState.labels) {
+                        convertedLoopState.labels = {};
+                    }
+                    convertedLoopState.labels[node.label.text] = node.label.text;
+                }
+                emit(node.statement);
+                if (convertedLoopState) {
+                    convertedLoopState.labels[node.label.text] = undefined;
+                }
+            }
+            function getContainingModule(node) {
+                do {
+                    node = node.parent;
+                } while (node && node.kind !== 225 /* ModuleDeclaration */);
+                return node;
+            }
+            function emitContainingModuleName(node) {
+                var container = getContainingModule(node);
+                write(container ? getGeneratedNameForNode(container) : "exports");
+            }
+            function emitModuleMemberName(node) {
+                emitStart(node.name);
+                if (ts.getCombinedNodeFlags(node) & 1 /* Export */) {
+                    var container = getContainingModule(node);
+                    if (container) {
+                        write(getGeneratedNameForNode(container));
+                        write(".");
+                    }
+                    else if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
+                        write("exports.");
+                    }
+                }
+                emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                emitEnd(node.name);
+            }
+            function createVoidZero() {
+                var zero = ts.createSynthesizedNode(8 /* NumericLiteral */);
+                zero.text = "0";
+                var result = ts.createSynthesizedNode(183 /* VoidExpression */);
+                result.expression = zero;
+                return result;
+            }
+            function emitEs6ExportDefaultCompat(node) {
+                if (node.parent.kind === 256 /* SourceFile */) {
+                    ts.Debug.assert(!!(node.flags & 512 /* Default */) || node.kind === 235 /* ExportAssignment */);
+                    // only allow export default at a source file level
+                    if (modulekind === ts.ModuleKind.CommonJS || modulekind === ts.ModuleKind.AMD || modulekind === ts.ModuleKind.UMD) {
+                        if (!isEs6Module) {
+                            if (languageVersion !== 0 /* ES3 */) {
+                                // default value of configurable, enumerable, writable are `false`.
+                                write('Object.defineProperty(exports, "__esModule", { value: true });');
+                                writeLine();
+                            }
+                            else {
+                                write("exports.__esModule = true;");
+                                writeLine();
+                            }
+                        }
+                    }
+                }
+            }
+            function emitExportMemberAssignment(node) {
+                if (node.flags & 1 /* Export */) {
+                    writeLine();
+                    emitStart(node);
+                    // emit call to exporter only for top level nodes
+                    if (modulekind === ts.ModuleKind.System && node.parent === currentSourceFile) {
+                        // emit export default <smth> as
+                        // export("default", <smth>)
+                        write(exportFunctionForFile + "(\"");
+                        if (node.flags & 512 /* Default */) {
+                            write("default");
+                        }
+                        else {
+                            emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                        }
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(")");
+                    }
+                    else {
+                        if (node.flags & 512 /* Default */) {
+                            emitEs6ExportDefaultCompat(node);
+                            if (languageVersion === 0 /* ES3 */) {
+                                write('exports["default"]');
+                            }
+                            else {
+                                write("exports.default");
+                            }
+                        }
+                        else {
+                            emitModuleMemberName(node);
+                        }
+                        write(" = ");
+                        emitDeclarationName(node);
+                    }
+                    emitEnd(node);
+                    write(";");
+                }
+            }
+            function emitExportMemberAssignments(name) {
+                if (modulekind === ts.ModuleKind.System) {
+                    return;
+                }
+                if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
+                    for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
+                        var specifier = _b[_a];
+                        writeLine();
+                        emitStart(specifier.name);
+                        emitContainingModuleName(specifier);
+                        write(".");
+                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                        emitEnd(specifier.name);
+                        write(" = ");
+                        emitExpressionIdentifier(name);
+                        write(";");
+                    }
+                }
+            }
+            function emitExportSpecifierInSystemModule(specifier) {
+                ts.Debug.assert(modulekind === ts.ModuleKind.System);
+                if (!resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name) && !resolver.isValueAliasDeclaration(specifier)) {
+                    return;
+                }
+                writeLine();
+                emitStart(specifier.name);
+                write(exportFunctionForFile + "(\"");
+                emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                write("\", ");
+                emitExpressionIdentifier(specifier.propertyName || specifier.name);
+                write(")");
+                emitEnd(specifier.name);
+                write(";");
+            }
+            /**
+             * Emit an assignment to a given identifier, 'name', with a given expression, 'value'.
+             * @param name an identifier as a left-hand-side operand of the assignment
+             * @param value an expression as a right-hand-side operand of the assignment
+             * @param shouldEmitCommaBeforeAssignment a boolean indicating whether to prefix an assignment with comma
+             */
+            function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) {
+                if (shouldEmitCommaBeforeAssignment) {
+                    write(", ");
+                }
+                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name);
+                if (exportChanged) {
+                    write(exportFunctionForFile + "(\"");
+                    emitNodeWithCommentsAndWithoutSourcemap(name);
+                    write("\", ");
+                }
+                var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 /* VariableDeclaration */ || name.parent.kind === 169 /* BindingElement */);
+                // If this is first var declaration, we need to start at var/let/const keyword instead
+                // otherwise use nodeForSourceMap as the start position
+                emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap);
+                withTemporaryNoSourceMap(function () {
+                    if (isVariableDeclarationOrBindingElement) {
+                        emitModuleMemberName(name.parent);
+                    }
+                    else {
+                        emit(name);
+                    }
+                    write(" = ");
+                    emit(value);
+                });
+                emitEnd(nodeForSourceMap, /*stopOverridingSpan*/ true);
+                if (exportChanged) {
+                    write(")");
+                }
+            }
+            /**
+             * Create temporary variable, emit an assignment of the variable the given expression
+             * @param expression an expression to assign to the newly created temporary variable
+             * @param canDefineTempVariablesInPlace a boolean indicating whether you can define the temporary variable at an assignment location
+             * @param shouldEmitCommaBeforeAssignment a boolean indicating whether an assignment should prefix with comma
+             */
+            function emitTempVariableAssignment(expression, canDefineTempVariablesInPlace, shouldEmitCommaBeforeAssignment, sourceMapNode) {
+                var identifier = createTempVariable(0 /* Auto */);
+                if (!canDefineTempVariablesInPlace) {
+                    recordTempDeclaration(identifier);
+                }
+                emitAssignment(identifier, expression, shouldEmitCommaBeforeAssignment, sourceMapNode || expression.parent);
+                return identifier;
+            }
+            function isFirstVariableDeclaration(root) {
+                return root.kind === 218 /* VariableDeclaration */ &&
+                    root.parent.kind === 219 /* VariableDeclarationList */ &&
+                    root.parent.declarations[0] === root;
+            }
+            function emitDestructuring(root, isAssignmentExpressionStatement, value) {
+                var emitCount = 0;
+                // An exported declaration is actually emitted as an assignment (to a property on the module object), so
+                // temporary variables in an exported declaration need to have real declarations elsewhere
+                // Also temporary variables should be explicitly allocated for source level declarations when module target is system
+                // because actual variable declarations are hoisted
+                var canDefineTempVariablesInPlace = false;
+                if (root.kind === 218 /* VariableDeclaration */) {
+                    var isExported = ts.getCombinedNodeFlags(root) & 1 /* Export */;
+                    var isSourceLevelForSystemModuleKind = shouldHoistDeclarationInSystemJsModule(root);
+                    canDefineTempVariablesInPlace = !isExported && !isSourceLevelForSystemModuleKind;
+                }
+                else if (root.kind === 142 /* Parameter */) {
+                    canDefineTempVariablesInPlace = true;
+                }
+                if (root.kind === 187 /* BinaryExpression */) {
+                    emitAssignmentExpression(root);
+                }
+                else {
+                    ts.Debug.assert(!isAssignmentExpressionStatement);
+                    // If first variable declaration of variable statement correct the start location
+                    if (isFirstVariableDeclaration(root)) {
+                        // Use emit location of "var " as next emit start entry
+                        sourceMap.changeEmitSourcePos();
+                    }
+                    emitBindingElement(root, value);
+                }
+                /**
+                 * Ensures that there exists a declared identifier whose value holds the given expression.
+                 * This function is useful to ensure that the expression's value can be read from in subsequent expressions.
+                 * Unless 'reuseIdentifierExpressions' is false, 'expr' will be returned if it is just an identifier.
+                 *
+                 * @param expr the expression whose value needs to be bound.
+                 * @param reuseIdentifierExpressions true if identifier expressions can simply be returned;
+                 *                                   false if it is necessary to always emit an identifier.
+                 */
+                function ensureIdentifier(expr, reuseIdentifierExpressions, sourceMapNode) {
+                    if (expr.kind === 69 /* Identifier */ && reuseIdentifierExpressions) {
+                        return expr;
+                    }
+                    var identifier = emitTempVariableAssignment(expr, canDefineTempVariablesInPlace, emitCount > 0, sourceMapNode);
+                    emitCount++;
+                    return identifier;
+                }
+                function createDefaultValueCheck(value, defaultValue, sourceMapNode) {
+                    // The value expression will be evaluated twice, so for anything but a simple identifier
+                    // we need to generate a temporary variable
+                    // If the temporary variable needs to be emitted use the source Map node for assignment of that statement
+                    value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode);
+                    // Return the expression 'value === void 0 ? defaultValue : value'
+                    var equals = ts.createSynthesizedNode(187 /* BinaryExpression */);
+                    equals.left = value;
+                    equals.operatorToken = ts.createSynthesizedNode(32 /* EqualsEqualsEqualsToken */);
+                    equals.right = createVoidZero();
+                    return createConditionalExpression(equals, defaultValue, value);
+                }
+                function createConditionalExpression(condition, whenTrue, whenFalse) {
+                    var cond = ts.createSynthesizedNode(188 /* ConditionalExpression */);
+                    cond.condition = condition;
+                    cond.questionToken = ts.createSynthesizedNode(53 /* QuestionToken */);
+                    cond.whenTrue = whenTrue;
+                    cond.colonToken = ts.createSynthesizedNode(54 /* ColonToken */);
+                    cond.whenFalse = whenFalse;
+                    return cond;
+                }
+                function createNumericLiteral(value) {
+                    var node = ts.createSynthesizedNode(8 /* NumericLiteral */);
+                    node.text = "" + value;
+                    return node;
+                }
+                function createPropertyAccessForDestructuringProperty(object, propName) {
+                    var index;
+                    var nameIsComputed = propName.kind === 140 /* ComputedPropertyName */;
+                    if (nameIsComputed) {
+                        // TODO to handle when we look into sourcemaps for computed properties, for now use propName
+                        index = ensureIdentifier(propName.expression, /*reuseIdentifierExpressions*/ false, propName);
+                    }
+                    else {
+                        // We create a synthetic copy of the identifier in order to avoid the rewriting that might
+                        // otherwise occur when the identifier is emitted.
+                        index = ts.createSynthesizedNode(propName.kind);
+                        // We need to unescape identifier here because when parsing an identifier prefixing with "__"
+                        // the parser need to append "_" in order to escape colliding with magic identifiers such as "__proto__"
+                        // Therefore, in order to correctly emit identifiers that are written in original TypeScript file,
+                        // we will unescapeIdentifier to remove additional underscore (if no underscore is added, the function will return original input string)
+                        index.text = ts.unescapeIdentifier(propName.text);
+                    }
+                    return !nameIsComputed && index.kind === 69 /* Identifier */
+                        ? createPropertyAccessExpression(object, index)
+                        : createElementAccessExpression(object, index);
+                }
+                function createSliceCall(value, sliceIndex) {
+                    var call = ts.createSynthesizedNode(174 /* CallExpression */);
+                    var sliceIdentifier = ts.createSynthesizedNode(69 /* Identifier */);
+                    sliceIdentifier.text = "slice";
+                    call.expression = createPropertyAccessExpression(value, sliceIdentifier);
+                    call.arguments = ts.createSynthesizedNodeArray();
+                    call.arguments[0] = createNumericLiteral(sliceIndex);
+                    return call;
+                }
+                function emitObjectLiteralAssignment(target, value, sourceMapNode) {
+                    var properties = target.properties;
+                    if (properties.length !== 1) {
+                        // For anything but a single element destructuring we need to generate a temporary
+                        // to ensure value is evaluated exactly once.
+                        // When doing so we want to highlight the passed in source map node since thats the one needing this temp assignment
+                        value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode);
+                    }
+                    for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) {
+                        var p = properties_5[_a];
+                        if (p.kind === 253 /* PropertyAssignment */ || p.kind === 254 /* ShorthandPropertyAssignment */) {
+                            var propName = p.name;
+                            var target_1 = p.kind === 254 /* ShorthandPropertyAssignment */ ? p : p.initializer || propName;
+                            // Assignment for target = value.propName should highlight whole property, hence use p as source map node
+                            emitDestructuringAssignment(target_1, createPropertyAccessForDestructuringProperty(value, propName), p);
+                        }
+                    }
+                }
+                function emitArrayLiteralAssignment(target, value, sourceMapNode) {
+                    var elements = target.elements;
+                    if (elements.length !== 1) {
+                        // For anything but a single element destructuring we need to generate a temporary
+                        // to ensure value is evaluated exactly once.
+                        // When doing so we want to highlight the passed in source map node since thats the one needing this temp assignment
+                        value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode);
+                    }
+                    for (var i = 0; i < elements.length; i++) {
+                        var e = elements[i];
+                        if (e.kind !== 193 /* OmittedExpression */) {
+                            // Assignment for target = value.propName should highlight whole property, hence use e as source map node
+                            if (e.kind !== 191 /* SpreadElementExpression */) {
+                                emitDestructuringAssignment(e, createElementAccessExpression(value, createNumericLiteral(i)), e);
+                            }
+                            else if (i === elements.length - 1) {
+                                emitDestructuringAssignment(e.expression, createSliceCall(value, i), e);
+                            }
+                        }
+                    }
+                }
+                function emitDestructuringAssignment(target, value, sourceMapNode) {
+                    // When emitting target = value use source map node to highlight, including any temporary assignments needed for this
+                    if (target.kind === 254 /* ShorthandPropertyAssignment */) {
+                        if (target.objectAssignmentInitializer) {
+                            value = createDefaultValueCheck(value, target.objectAssignmentInitializer, sourceMapNode);
+                        }
+                        target = target.name;
+                    }
+                    else if (target.kind === 187 /* BinaryExpression */ && target.operatorToken.kind === 56 /* EqualsToken */) {
+                        value = createDefaultValueCheck(value, target.right, sourceMapNode);
+                        target = target.left;
+                    }
+                    if (target.kind === 171 /* ObjectLiteralExpression */) {
+                        emitObjectLiteralAssignment(target, value, sourceMapNode);
+                    }
+                    else if (target.kind === 170 /* ArrayLiteralExpression */) {
+                        emitArrayLiteralAssignment(target, value, sourceMapNode);
+                    }
+                    else {
+                        emitAssignment(target, value, /*shouldEmitCommaBeforeAssignment*/ emitCount > 0, sourceMapNode);
+                        emitCount++;
+                    }
+                }
+                function emitAssignmentExpression(root) {
+                    var target = root.left;
+                    var value = root.right;
+                    if (ts.isEmptyObjectLiteralOrArrayLiteral(target)) {
+                        emit(value);
+                    }
+                    else if (isAssignmentExpressionStatement) {
+                        // Source map node for root.left = root.right is root
+                        // but if root is synthetic, which could be in below case, use the target which is { a }
+                        // for ({a} of {a: string}) {
+                        // }
+                        emitDestructuringAssignment(target, value, ts.nodeIsSynthesized(root) ? target : root);
+                    }
+                    else {
+                        if (root.parent.kind !== 178 /* ParenthesizedExpression */) {
+                            write("(");
+                        }
+                        // Temporary assignment needed to emit root should highlight whole binary expression
+                        value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, root);
+                        // Source map node for root.left = root.right is root
+                        emitDestructuringAssignment(target, value, root);
+                        write(", ");
+                        emit(value);
+                        if (root.parent.kind !== 178 /* ParenthesizedExpression */) {
+                            write(")");
+                        }
+                    }
+                }
+                function emitBindingElement(target, value) {
+                    // Any temporary assignments needed to emit target = value should point to target
+                    if (target.initializer) {
+                        // Combine value and initializer
+                        value = value ? createDefaultValueCheck(value, target.initializer, target) : target.initializer;
+                    }
+                    else if (!value) {
+                        // Use 'void 0' in absence of value and initializer
+                        value = createVoidZero();
+                    }
+                    if (ts.isBindingPattern(target.name)) {
+                        var pattern = target.name;
+                        var elements = pattern.elements;
+                        var numElements = elements.length;
+                        if (numElements !== 1) {
+                            // For anything other than a single-element destructuring we need to generate a temporary
+                            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
+                            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
+                            // so in that case, we'll intentionally create that temporary.
+                            value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ numElements !== 0, target);
+                        }
+                        for (var i = 0; i < numElements; i++) {
+                            var element = elements[i];
+                            if (pattern.kind === 167 /* ObjectBindingPattern */) {
+                                // Rewrite element to a declaration with an initializer that fetches property
+                                var propName = element.propertyName || element.name;
+                                emitBindingElement(element, createPropertyAccessForDestructuringProperty(value, propName));
+                            }
+                            else if (element.kind !== 193 /* OmittedExpression */) {
+                                if (!element.dotDotDotToken) {
+                                    // Rewrite element to a declaration that accesses array element at index i
+                                    emitBindingElement(element, createElementAccessExpression(value, createNumericLiteral(i)));
+                                }
+                                else if (i === numElements - 1) {
+                                    emitBindingElement(element, createSliceCall(value, i));
+                                }
+                            }
+                        }
+                    }
+                    else {
+                        emitAssignment(target.name, value, /*shouldEmitCommaBeforeAssignment*/ emitCount > 0, target);
+                        emitCount++;
+                    }
+                }
+            }
+            function emitVariableDeclaration(node) {
+                if (ts.isBindingPattern(node.name)) {
+                    var isExported = ts.getCombinedNodeFlags(node) & 1 /* Export */;
+                    if (languageVersion >= 2 /* ES6 */ && (!isExported || modulekind === ts.ModuleKind.ES6)) {
+                        // emit ES6 destructuring only if target module is ES6 or variable is not exported
+                        // exported variables in CJS/AMD are prefixed with 'exports.' so result javascript { exports.toString } = 1; is illegal
+                        var isTopLevelDeclarationInSystemModule = modulekind === ts.ModuleKind.System &&
+                            shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ true);
+                        if (isTopLevelDeclarationInSystemModule) {
+                            // In System modules top level variables are hoisted
+                            // so variable declarations with destructuring are turned into destructuring assignments.
+                            // As a result, they will need parentheses to disambiguate object binding assignments from blocks.
+                            write("(");
+                        }
+                        emit(node.name);
+                        emitOptional(" = ", node.initializer);
+                        if (isTopLevelDeclarationInSystemModule) {
+                            write(")");
+                        }
+                    }
+                    else {
+                        emitDestructuring(node, /*isAssignmentExpressionStatement*/ false);
+                    }
+                }
+                else {
+                    var initializer = node.initializer;
+                    if (!initializer &&
+                        languageVersion < 2 /* ES6 */ &&
+                        // for names - binding patterns that lack initializer there is no point to emit explicit initializer
+                        // since downlevel codegen for destructuring will fail in the absence of initializer so all binding elements will say uninitialized
+                        node.name.kind === 69 /* Identifier */) {
+                        var container = ts.getEnclosingBlockScopeContainer(node);
+                        var flags = resolver.getNodeCheckFlags(node);
+                        // nested let bindings might need to be initialized explicitly to preserve ES6 semantic
+                        // { let x = 1; }
+                        // { let x; } // x here should be undefined. not 1
+                        // NOTES:
+                        // Top level bindings never collide with anything and thus don't require explicit initialization.
+                        // As for nested let bindings there are two cases:
+                        // - nested let bindings that were not renamed definitely should be initialized explicitly
+                        //   { let x = 1; }
+                        //   { let x; if (some-condition) { x = 1}; if (x) { /*1*/ } }
+                        //   Without explicit initialization code in /*1*/ can be executed even if some-condition is evaluated to false
+                        // - renaming introduces fresh name that should not collide with any existing names, however renamed bindings sometimes also should be
+                        //   explicitly initialized. One particular case: non-captured binding declared inside loop body (but not in loop initializer)
+                        //   let x;
+                        //   for (;;) {
+                        //       let x;
+                        //   }
+                        //   in downlevel codegen inner 'x' will be renamed so it won't collide with outer 'x' however it will should be reset on every iteration
+                        //   as if it was declared anew.
+                        //   * Why non-captured binding - because if loop contains block scoped binding captured in some function then loop body will be rewritten
+                        //   to have a fresh scope on every iteration so everything will just work.
+                        //   * Why loop initializer is excluded - since we've introduced a fresh name it already will be undefined.
+                        var isCapturedInFunction = flags & 131072 /* CapturedBlockScopedBinding */;
+                        var isDeclaredInLoop = flags & 262144 /* BlockScopedBindingInLoop */;
+                        var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(container) ||
+                            (isCapturedInFunction && isDeclaredInLoop && container.kind === 199 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false));
+                        var emittedAsNestedLetDeclaration = ts.getCombinedNodeFlags(node) & 1024 /* Let */ &&
+                            !emittedAsTopLevel;
+                        var emitExplicitInitializer = emittedAsNestedLetDeclaration &&
+                            container.kind !== 207 /* ForInStatement */ &&
+                            container.kind !== 208 /* ForOfStatement */ &&
+                            (!resolver.isDeclarationWithCollidingName(node) ||
+                                (isDeclaredInLoop && !isCapturedInFunction && !ts.isIterationStatement(container, /*lookInLabeledStatements*/ false)));
+                        if (emitExplicitInitializer) {
+                            initializer = createVoidZero();
+                        }
+                    }
+                    var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.name);
+                    if (exportChanged) {
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                        write("\", ");
+                    }
+                    emitModuleMemberName(node);
+                    emitOptional(" = ", initializer);
+                    if (exportChanged) {
+                        write(")");
+                    }
+                }
+            }
+            function emitExportVariableAssignments(node) {
+                if (node.kind === 193 /* OmittedExpression */) {
+                    return;
+                }
+                var name = node.name;
+                if (name.kind === 69 /* Identifier */) {
+                    emitExportMemberAssignments(name);
+                }
+                else if (ts.isBindingPattern(name)) {
+                    ts.forEach(name.elements, emitExportVariableAssignments);
+                }
+            }
+            function isES6ExportedDeclaration(node) {
+                return !!(node.flags & 1 /* Export */) &&
+                    modulekind === ts.ModuleKind.ES6 &&
+                    node.parent.kind === 256 /* SourceFile */;
+            }
+            function emitVariableStatement(node) {
+                var startIsEmitted = false;
+                if (node.flags & 1 /* Export */) {
+                    if (isES6ExportedDeclaration(node)) {
+                        // Exported ES6 module member
+                        write("export ");
+                        startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
+                    }
+                }
+                else {
+                    startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
+                }
+                if (startIsEmitted) {
+                    emitCommaList(node.declarationList.declarations);
+                    write(";");
+                }
+                else {
+                    var atLeastOneItem = emitVariableDeclarationListSkippingUninitializedEntries(node.declarationList);
+                    if (atLeastOneItem) {
+                        write(";");
+                    }
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
+                    ts.forEach(node.declarationList.declarations, emitExportVariableAssignments);
+                }
+            }
+            function shouldEmitLeadingAndTrailingCommentsForVariableStatement(node) {
+                // If we're not exporting the variables, there's nothing special here.
+                // Always emit comments for these nodes.
+                if (!(node.flags & 1 /* Export */)) {
+                    return true;
+                }
+                // If we are exporting, but it's a top-level ES6 module exports,
+                // we'll emit the declaration list verbatim, so emit comments too.
+                if (isES6ExportedDeclaration(node)) {
+                    return true;
+                }
+                // Otherwise, only emit if we have at least one initializer present.
+                for (var _a = 0, _b = node.declarationList.declarations; _a < _b.length; _a++) {
+                    var declaration = _b[_a];
+                    if (declaration.initializer) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function emitParameter(node) {
+                if (languageVersion < 2 /* ES6 */) {
+                    if (ts.isBindingPattern(node.name)) {
+                        var name_29 = createTempVariable(0 /* Auto */);
+                        if (!tempParameters) {
+                            tempParameters = [];
+                        }
+                        tempParameters.push(name_29);
+                        emit(name_29);
+                    }
+                    else {
+                        emit(node.name);
+                    }
+                }
+                else {
+                    if (node.dotDotDotToken) {
+                        write("...");
+                    }
+                    emit(node.name);
+                    emitOptional(" = ", node.initializer);
+                }
+            }
+            function emitDefaultValueAssignments(node) {
+                if (languageVersion < 2 /* ES6 */) {
+                    var tempIndex_1 = 0;
+                    ts.forEach(node.parameters, function (parameter) {
+                        // A rest parameter cannot have a binding pattern or an initializer,
+                        // so let's just ignore it.
+                        if (parameter.dotDotDotToken) {
+                            return;
+                        }
+                        var paramName = parameter.name, initializer = parameter.initializer;
+                        if (ts.isBindingPattern(paramName)) {
+                            // In cases where a binding pattern is simply '[]' or '{}',
+                            // we usually don't want to emit a var declaration; however, in the presence
+                            // of an initializer, we must emit that expression to preserve side effects.
+                            var hasBindingElements = paramName.elements.length > 0;
+                            if (hasBindingElements || initializer) {
+                                writeLine();
+                                write("var ");
+                                if (hasBindingElements) {
+                                    emitDestructuring(parameter, /*isAssignmentExpressionStatement*/ false, tempParameters[tempIndex_1]);
+                                }
+                                else {
+                                    emit(tempParameters[tempIndex_1]);
+                                    write(" = ");
+                                    emit(initializer);
+                                }
+                                write(";");
+                                tempIndex_1++;
+                            }
+                        }
+                        else if (initializer) {
+                            writeLine();
+                            emitStart(parameter);
+                            write("if (");
+                            emitNodeWithoutSourceMap(paramName);
+                            write(" === void 0)");
+                            emitEnd(parameter);
+                            write(" { ");
+                            emitStart(parameter);
+                            emitNodeWithCommentsAndWithoutSourcemap(paramName);
+                            write(" = ");
+                            emitNodeWithCommentsAndWithoutSourcemap(initializer);
+                            emitEnd(parameter);
+                            write("; }");
+                        }
+                    });
+                }
+            }
+            function emitRestParameter(node) {
+                if (languageVersion < 2 /* ES6 */ && ts.hasDeclaredRestParameter(node)) {
+                    var restIndex = node.parameters.length - 1;
+                    var restParam = node.parameters[restIndex];
+                    // A rest parameter cannot have a binding pattern, so let's just ignore it if it does.
+                    if (ts.isBindingPattern(restParam.name)) {
+                        return;
+                    }
+                    var tempName = createTempVariable(268435456 /* _i */).text;
+                    writeLine();
+                    emitLeadingComments(restParam);
+                    emitStart(restParam);
+                    write("var ");
+                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
+                    write(" = [];");
+                    emitEnd(restParam);
+                    emitTrailingComments(restParam);
+                    writeLine();
+                    write("for (");
+                    emitStart(restParam);
+                    write("var " + tempName + " = " + restIndex + ";");
+                    emitEnd(restParam);
+                    write(" ");
+                    emitStart(restParam);
+                    write(tempName + " < arguments.length;");
+                    emitEnd(restParam);
+                    write(" ");
+                    emitStart(restParam);
+                    write(tempName + "++");
+                    emitEnd(restParam);
+                    write(") {");
+                    increaseIndent();
+                    writeLine();
+                    emitStart(restParam);
+                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
+                    write("[" + tempName + " - " + restIndex + "] = arguments[" + tempName + "];");
+                    emitEnd(restParam);
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function emitAccessor(node) {
+                write(node.kind === 149 /* GetAccessor */ ? "get " : "set ");
+                emit(node.name);
+                emitSignatureAndBody(node);
+            }
+            function shouldEmitAsArrowFunction(node) {
+                return node.kind === 180 /* ArrowFunction */ && languageVersion >= 2 /* ES6 */;
+            }
+            function emitDeclarationName(node) {
+                if (node.name) {
+                    emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                }
+                else {
+                    write(getGeneratedNameForNode(node));
+                }
+            }
+            function shouldEmitFunctionName(node) {
+                if (node.kind === 179 /* FunctionExpression */) {
+                    // Emit name if one is present
+                    return !!node.name;
+                }
+                if (node.kind === 220 /* FunctionDeclaration */) {
+                    // Emit name if one is present, or emit generated name in down-level case (for export default case)
+                    return !!node.name || modulekind !== ts.ModuleKind.ES6;
+                }
+            }
+            function emitFunctionDeclaration(node) {
+                if (ts.nodeIsMissing(node.body)) {
+                    return emitCommentsOnNotEmittedNode(node);
+                }
+                // TODO (yuisu) : we should not have special cases to condition emitting comments
+                // but have one place to fix check for these conditions.
+                var kind = node.kind, parent = node.parent;
+                if (kind !== 147 /* MethodDeclaration */ &&
+                    kind !== 146 /* MethodSignature */ &&
+                    parent &&
+                    parent.kind !== 253 /* PropertyAssignment */ &&
+                    parent.kind !== 174 /* CallExpression */ &&
+                    parent.kind !== 170 /* ArrayLiteralExpression */) {
+                    // 1. Methods will emit comments at their assignment declaration sites.
+                    //
+                    // 2. If the function is a property of object literal, emitting leading-comments
+                    //    is done by emitNodeWithoutSourceMap which then call this function.
+                    //    In particular, we would like to avoid emit comments twice in following case:
+                    //
+                    //          var obj = {
+                    //              id:
+                    //                  /*comment*/ () => void
+                    //          }
+                    //
+                    // 3. If the function is an argument in call expression, emitting of comments will be
+                    //    taken care of in emit list of arguments inside of 'emitCallExpression'.
+                    //
+                    // 4. If the function is in an array literal, 'emitLinePreservingList' will take care
+                    //    of leading comments.
+                    emitLeadingComments(node);
+                }
+                emitStart(node);
+                // For targeting below es6, emit functions-like declaration including arrow function using function keyword.
+                // When targeting ES6, emit arrow function natively in ES6 by omitting function keyword and using fat arrow instead
+                if (!shouldEmitAsArrowFunction(node)) {
+                    if (isES6ExportedDeclaration(node)) {
+                        write("export ");
+                        if (node.flags & 512 /* Default */) {
+                            write("default ");
+                        }
+                    }
+                    write("function");
+                    if (languageVersion >= 2 /* ES6 */ && node.asteriskToken) {
+                        write("*");
+                    }
+                    write(" ");
+                }
+                if (shouldEmitFunctionName(node)) {
+                    emitDeclarationName(node);
+                }
+                emitSignatureAndBody(node);
+                if (modulekind !== ts.ModuleKind.ES6 && kind === 220 /* FunctionDeclaration */ && parent === currentSourceFile && node.name) {
+                    emitExportMemberAssignments(node.name);
+                }
+                emitEnd(node);
+                if (kind !== 147 /* MethodDeclaration */ &&
+                    kind !== 146 /* MethodSignature */ &&
+                    kind !== 180 /* ArrowFunction */) {
+                    emitTrailingComments(node);
+                }
+            }
+            function emitCaptureThisForNodeIfNecessary(node) {
+                if (resolver.getNodeCheckFlags(node) & 4 /* CaptureThis */) {
+                    writeLine();
+                    emitStart(node);
+                    write("var _this = this;");
+                    emitEnd(node);
+                }
+            }
+            function emitSignatureParameters(node) {
+                increaseIndent();
+                write("(");
+                if (node) {
+                    var parameters = node.parameters;
+                    var skipCount = node.parameters.length && node.parameters[0].name.text === "this" ? 1 : 0;
+                    var omitCount = languageVersion < 2 /* ES6 */ && ts.hasDeclaredRestParameter(node) ? 1 : 0;
+                    emitList(parameters, skipCount, parameters.length - omitCount - skipCount, /*multiLine*/ false, /*trailingComma*/ false);
+                }
+                write(")");
+                decreaseIndent();
+            }
+            function emitSignatureParametersForArrow(node) {
+                // Check whether the parameter list needs parentheses and preserve no-parenthesis
+                if (node.parameters.length === 1 && node.pos === node.parameters[0].pos) {
+                    emit(node.parameters[0]);
+                    return;
+                }
+                emitSignatureParameters(node);
+            }
+            function emitAsyncFunctionBodyForES6(node) {
+                var promiseConstructor = ts.getEntityNameFromTypeNode(node.type);
+                var isArrowFunction = node.kind === 180 /* ArrowFunction */;
+                var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192 /* CaptureArguments */) !== 0;
+                // An async function is emit as an outer function that calls an inner
+                // generator function. To preserve lexical bindings, we pass the current
+                // `this` and `arguments` objects to `__awaiter`. The generator function
+                // passed to `__awaiter` is executed inside of the callback to the
+                // promise constructor.
+                //
+                // The emit for an async arrow without a lexical `arguments` binding might be:
+                //
+                //  // input
+                //  let a = async (b) => { await b; }
+                //
+                //  // output
+                //  let a = (b) => __awaiter(this, void 0, void 0, function* () {
+                //      yield b;
+                //  });
+                //
+                // The emit for an async arrow with a lexical `arguments` binding might be:
+                //
+                //  // input
+                //  let a = async (b) => { await arguments[0]; }
+                //
+                //  // output
+                //  let a = (b) => __awaiter(this, arguments, void 0, function* (arguments) {
+                //      yield arguments[0];
+                //  });
+                //
+                // The emit for an async function expression without a lexical `arguments` binding
+                // might be:
+                //
+                //  // input
+                //  let a = async function (b) {
+                //      await b;
+                //  }
+                //
+                //  // output
+                //  let a = function (b) {
+                //      return __awaiter(this, void 0, void 0, function* () {
+                //          yield b;
+                //      });
+                //  }
+                //
+                // The emit for an async function expression with a lexical `arguments` binding
+                // might be:
+                //
+                //  // input
+                //  let a = async function (b) {
+                //      await arguments[0];
+                //  }
+                //
+                //  // output
+                //  let a = function (b) {
+                //      return __awaiter(this, arguments, void 0, function* (_arguments) {
+                //          yield _arguments[0];
+                //      });
+                //  }
+                //
+                // The emit for an async function expression with a lexical `arguments` binding
+                // and a return type annotation might be:
+                //
+                //  // input
+                //  let a = async function (b): MyPromise<any> {
+                //      await arguments[0];
+                //  }
+                //
+                //  // output
+                //  let a = function (b) {
+                //      return __awaiter(this, arguments, MyPromise, function* (_arguments) {
+                //          yield _arguments[0];
+                //      });
+                //  }
+                //
+                // If this is not an async arrow, emit the opening brace of the function body
+                // and the start of the return statement.
+                if (!isArrowFunction) {
+                    write(" {");
+                    increaseIndent();
+                    writeLine();
+                    if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
+                        writeLines("\nconst _super = (function (geti, seti) {\n    const cache = Object.create(null);\n    return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);");
+                        writeLine();
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
+                        write("const _super = name => super[name];");
+                        writeLine();
+                    }
+                    write("return");
+                }
+                write(" __awaiter(this");
+                if (hasLexicalArguments) {
+                    write(", arguments, ");
+                }
+                else {
+                    write(", void 0, ");
+                }
+                if (languageVersion >= 2 /* ES6 */ || !promiseConstructor) {
+                    write("void 0");
+                }
+                else {
+                    emitEntityNameAsExpression(promiseConstructor, /*useFallback*/ false);
+                }
+                // Emit the call to __awaiter.
+                write(", function* ()");
+                // Emit the signature and body for the inner generator function.
+                emitFunctionBody(node);
+                write(")");
+                // If this is not an async arrow, emit the closing brace of the outer function body.
+                if (!isArrowFunction) {
+                    write(";");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function emitFunctionBody(node) {
+                if (!node.body) {
+                    // There can be no body when there are parse errors.  Just emit an empty block
+                    // in that case.
+                    write(" { }");
+                }
+                else {
+                    if (node.body.kind === 199 /* Block */) {
+                        emitBlockFunctionBody(node, node.body);
+                    }
+                    else {
+                        emitExpressionFunctionBody(node, node.body);
+                    }
+                }
+            }
+            function emitSignatureAndBody(node) {
+                var saveConvertedLoopState = convertedLoopState;
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                // When targeting ES6, emit arrow function natively in ES6
+                if (shouldEmitAsArrowFunction(node)) {
+                    emitSignatureParametersForArrow(node);
+                    write(" =>");
+                }
+                else {
+                    emitSignatureParameters(node);
+                }
+                var isAsync = ts.isAsyncFunctionLike(node);
+                if (isAsync) {
+                    emitAsyncFunctionBodyForES6(node);
+                }
+                else {
+                    emitFunctionBody(node);
+                }
+                if (!isES6ExportedDeclaration(node)) {
+                    emitExportMemberAssignment(node);
+                }
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+            }
+            // Returns true if any preamble code was emitted.
+            function emitFunctionBodyPreamble(node) {
+                emitCaptureThisForNodeIfNecessary(node);
+                emitDefaultValueAssignments(node);
+                emitRestParameter(node);
+            }
+            function emitExpressionFunctionBody(node, body) {
+                if (languageVersion < 2 /* ES6 */ || node.flags & 256 /* Async */) {
+                    emitDownLevelExpressionFunctionBody(node, body);
+                    return;
+                }
+                // For es6 and higher we can emit the expression as is.  However, in the case
+                // where the expression might end up looking like a block when emitted, we'll
+                // also wrap it in parentheses first.  For example if you have: a => <foo>{}
+                // then we need to generate: a => ({})
+                write(" ");
+                // Unwrap all type assertions.
+                var current = body;
+                while (current.kind === 177 /* TypeAssertionExpression */) {
+                    current = current.expression;
+                }
+                emitParenthesizedIf(body, current.kind === 171 /* ObjectLiteralExpression */);
+            }
+            function emitDownLevelExpressionFunctionBody(node, body) {
+                write(" {");
+                increaseIndent();
+                var outPos = writer.getTextPos();
+                emitDetachedCommentsAndUpdateCommentsInfo(node.body);
+                emitFunctionBodyPreamble(node);
+                var preambleEmitted = writer.getTextPos() !== outPos;
+                decreaseIndent();
+                // If we didn't have to emit any preamble code, then attempt to keep the arrow
+                // function on one line.
+                if (!preambleEmitted && nodeStartPositionsAreOnSameLine(node, body)) {
+                    write(" ");
+                    emitStart(body);
+                    write("return ");
+                    emit(body);
+                    emitEnd(body);
+                    write(";");
+                    emitTempDeclarations(/*newLine*/ false);
+                    write(" ");
+                }
+                else {
+                    increaseIndent();
+                    writeLine();
+                    emitLeadingComments(node.body);
+                    emitStart(body);
+                    write("return ");
+                    emit(body);
+                    emitEnd(body);
+                    write(";");
+                    emitTrailingComments(node.body);
+                    emitTempDeclarations(/*newLine*/ true);
+                    decreaseIndent();
+                    writeLine();
+                }
+                emitStart(node.body);
+                write("}");
+                emitEnd(node.body);
+            }
+            function emitBlockFunctionBody(node, body) {
+                write(" {");
+                var initialTextPos = writer.getTextPos();
+                increaseIndent();
+                emitDetachedCommentsAndUpdateCommentsInfo(body.statements);
+                // Emit all the directive prologues (like "use strict").  These have to come before
+                // any other preamble code we write (like parameter initializers).
+                var startIndex = emitDirectivePrologues(body.statements, /*startWithNewLine*/ true);
+                emitFunctionBodyPreamble(node);
+                decreaseIndent();
+                var preambleEmitted = writer.getTextPos() !== initialTextPos;
+                if (!preambleEmitted && nodeEndIsOnSameLineAsNodeStart(body, body)) {
+                    for (var _a = 0, _b = body.statements; _a < _b.length; _a++) {
+                        var statement = _b[_a];
+                        write(" ");
+                        emit(statement);
+                    }
+                    emitTempDeclarations(/*newLine*/ false);
+                    write(" ");
+                    emitLeadingCommentsOfPosition(body.statements.end);
+                }
+                else {
+                    increaseIndent();
+                    emitLinesStartingAt(body.statements, startIndex);
+                    emitTempDeclarations(/*newLine*/ true);
+                    writeLine();
+                    emitLeadingCommentsOfPosition(body.statements.end);
+                    decreaseIndent();
+                }
+                emitToken(16 /* CloseBraceToken */, body.statements.end);
+            }
+            /**
+             * Return the statement at a given index if it is a super-call statement
+             * @param ctor a constructor declaration
+             * @param index an index to constructor's body to check
+             */
+            function getSuperCallAtGivenIndex(ctor, index) {
+                if (!ctor.body) {
+                    return undefined;
+                }
+                var statements = ctor.body.statements;
+                if (!statements || index >= statements.length) {
+                    return undefined;
+                }
+                var statement = statements[index];
+                if (statement.kind === 202 /* ExpressionStatement */) {
+                    return ts.isSuperCallExpression(statement.expression) ? statement : undefined;
+                }
+            }
+            function emitParameterPropertyAssignments(node) {
+                ts.forEach(node.parameters, function (param) {
+                    if (param.flags & 92 /* ParameterPropertyModifier */) {
+                        writeLine();
+                        emitStart(param);
+                        emitStart(param.name);
+                        write("this.");
+                        emitNodeWithoutSourceMap(param.name);
+                        emitEnd(param.name);
+                        write(" = ");
+                        emit(param.name);
+                        write(";");
+                        emitEnd(param);
+                    }
+                });
+            }
+            function emitMemberAccessForPropertyName(memberName) {
+                // This does not emit source map because it is emitted by caller as caller
+                // is aware how the property name changes to the property access
+                // eg. public x = 10; becomes this.x and static x = 10 becomes className.x
+                if (memberName.kind === 9 /* StringLiteral */ || memberName.kind === 8 /* NumericLiteral */) {
+                    write("[");
+                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
+                    write("]");
+                }
+                else if (memberName.kind === 140 /* ComputedPropertyName */) {
+                    emitComputedPropertyName(memberName);
+                }
+                else {
+                    write(".");
+                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
+                }
+            }
+            function getInitializedProperties(node, isStatic) {
+                var properties = [];
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    if (member.kind === 145 /* PropertyDeclaration */ && isStatic === ((member.flags & 32 /* Static */) !== 0) && member.initializer) {
+                        properties.push(member);
+                    }
+                }
+                return properties;
+            }
+            function emitPropertyDeclarations(node, properties) {
+                for (var _a = 0, properties_6 = properties; _a < properties_6.length; _a++) {
+                    var property = properties_6[_a];
+                    emitPropertyDeclaration(node, property);
+                }
+            }
+            function emitPropertyDeclaration(node, property, receiver, isExpression) {
+                writeLine();
+                emitLeadingComments(property);
+                emitStart(property);
+                emitStart(property.name);
+                if (receiver) {
+                    emit(receiver);
+                }
+                else {
+                    if (property.flags & 32 /* Static */) {
+                        emitDeclarationName(node);
+                    }
+                    else {
+                        write("this");
+                    }
+                }
+                emitMemberAccessForPropertyName(property.name);
+                emitEnd(property.name);
+                write(" = ");
+                emit(property.initializer);
+                if (!isExpression) {
+                    write(";");
+                }
+                emitEnd(property);
+                emitTrailingComments(property);
+            }
+            function emitMemberFunctionsForES5AndLower(node) {
+                ts.forEach(node.members, function (member) {
+                    if (member.kind === 198 /* SemicolonClassElement */) {
+                        writeLine();
+                        write(";");
+                    }
+                    else if (member.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) {
+                        if (!member.body) {
+                            return emitCommentsOnNotEmittedNode(member);
+                        }
+                        writeLine();
+                        emitLeadingComments(member);
+                        emitStart(member);
+                        emitStart(member.name);
+                        emitClassMemberPrefix(node, member);
+                        emitMemberAccessForPropertyName(member.name);
+                        emitEnd(member.name);
+                        write(" = ");
+                        emitFunctionDeclaration(member);
+                        emitEnd(member);
+                        write(";");
+                        emitTrailingComments(member);
+                    }
+                    else if (member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */) {
+                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
+                        if (member === accessors.firstAccessor) {
+                            writeLine();
+                            emitStart(member);
+                            write("Object.defineProperty(");
+                            emitStart(member.name);
+                            emitClassMemberPrefix(node, member);
+                            write(", ");
+                            emitExpressionForPropertyName(member.name);
+                            emitEnd(member.name);
+                            write(", {");
+                            increaseIndent();
+                            if (accessors.getAccessor) {
+                                writeLine();
+                                emitLeadingComments(accessors.getAccessor);
+                                write("get: ");
+                                emitStart(accessors.getAccessor);
+                                write("function ");
+                                emitSignatureAndBody(accessors.getAccessor);
+                                emitEnd(accessors.getAccessor);
+                                emitTrailingComments(accessors.getAccessor);
+                                write(",");
+                            }
+                            if (accessors.setAccessor) {
+                                writeLine();
+                                emitLeadingComments(accessors.setAccessor);
+                                write("set: ");
+                                emitStart(accessors.setAccessor);
+                                write("function ");
+                                emitSignatureAndBody(accessors.setAccessor);
+                                emitEnd(accessors.setAccessor);
+                                emitTrailingComments(accessors.setAccessor);
+                                write(",");
+                            }
+                            writeLine();
+                            write("enumerable: true,");
+                            writeLine();
+                            write("configurable: true");
+                            decreaseIndent();
+                            writeLine();
+                            write("});");
+                            emitEnd(member);
+                        }
+                    }
+                });
+            }
+            function emitMemberFunctionsForES6AndHigher(node) {
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    if ((member.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) && !member.body) {
+                        emitCommentsOnNotEmittedNode(member);
+                    }
+                    else if (member.kind === 147 /* MethodDeclaration */ ||
+                        member.kind === 149 /* GetAccessor */ ||
+                        member.kind === 150 /* SetAccessor */) {
+                        writeLine();
+                        emitLeadingComments(member);
+                        emitStart(member);
+                        if (member.flags & 32 /* Static */) {
+                            write("static ");
+                        }
+                        if (member.kind === 149 /* GetAccessor */) {
+                            write("get ");
+                        }
+                        else if (member.kind === 150 /* SetAccessor */) {
+                            write("set ");
+                        }
+                        if (member.asteriskToken) {
+                            write("*");
+                        }
+                        emit(member.name);
+                        emitSignatureAndBody(member);
+                        emitEnd(member);
+                        emitTrailingComments(member);
+                    }
+                    else if (member.kind === 198 /* SemicolonClassElement */) {
+                        writeLine();
+                        write(";");
+                    }
+                }
+            }
+            function emitConstructor(node, baseTypeElement) {
+                var saveConvertedLoopState = convertedLoopState;
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                emitConstructorWorker(node, baseTypeElement);
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+            }
+            function emitConstructorWorker(node, baseTypeElement) {
+                // Check if we have property assignment inside class declaration.
+                // If there is property assignment, we need to emit constructor whether users define it or not
+                // If there is no property assignment, we can omit constructor if users do not define it
+                var hasInstancePropertyWithInitializer = false;
+                // Emit the constructor overload pinned comments
+                ts.forEach(node.members, function (member) {
+                    if (member.kind === 148 /* Constructor */ && !member.body) {
+                        emitCommentsOnNotEmittedNode(member);
+                    }
+                    // Check if there is any non-static property assignment
+                    if (member.kind === 145 /* PropertyDeclaration */ && member.initializer && (member.flags & 32 /* Static */) === 0) {
+                        hasInstancePropertyWithInitializer = true;
+                    }
+                });
+                var ctor = ts.getFirstConstructorWithBody(node);
+                // For target ES6 and above, if there is no user-defined constructor and there is no property assignment
+                // do not emit constructor in class declaration.
+                if (languageVersion >= 2 /* ES6 */ && !ctor && !hasInstancePropertyWithInitializer) {
+                    return;
+                }
+                if (ctor) {
+                    emitLeadingComments(ctor);
+                }
+                emitStart(ctor || node);
+                if (languageVersion < 2 /* ES6 */) {
+                    write("function ");
+                    emitDeclarationName(node);
+                    emitSignatureParameters(ctor);
+                }
+                else {
+                    write("constructor");
+                    if (ctor) {
+                        emitSignatureParameters(ctor);
+                    }
+                    else {
+                        // Based on EcmaScript6 section 14.5.14: Runtime Semantics: ClassDefinitionEvaluation.
+                        // If constructor is empty, then,
+                        //      If ClassHeritageopt is present, then
+                        //          Let constructor be the result of parsing the String "constructor(... args){ super (...args);}" using the syntactic grammar with the goal symbol MethodDefinition.
+                        //      Else,
+                        //          Let constructor be the result of parsing the String "constructor( ){ }" using the syntactic grammar with the goal symbol MethodDefinition
+                        if (baseTypeElement) {
+                            write("(...args)");
+                        }
+                        else {
+                            write("()");
+                        }
+                    }
+                }
+                var startIndex = 0;
+                write(" {");
+                increaseIndent();
+                if (ctor) {
+                    // Emit all the directive prologues (like "use strict").  These have to come before
+                    // any other preamble code we write (like parameter initializers).
+                    startIndex = emitDirectivePrologues(ctor.body.statements, /*startWithNewLine*/ true);
+                    emitDetachedCommentsAndUpdateCommentsInfo(ctor.body.statements);
+                }
+                emitCaptureThisForNodeIfNecessary(node);
+                var superCall;
+                if (ctor) {
+                    emitDefaultValueAssignments(ctor);
+                    emitRestParameter(ctor);
+                    if (baseTypeElement) {
+                        superCall = getSuperCallAtGivenIndex(ctor, startIndex);
+                        if (superCall) {
+                            writeLine();
+                            emit(superCall);
+                        }
+                    }
+                    emitParameterPropertyAssignments(ctor);
+                }
+                else {
+                    if (baseTypeElement) {
+                        writeLine();
+                        emitStart(baseTypeElement);
+                        if (languageVersion < 2 /* ES6 */) {
+                            write("_super.apply(this, arguments);");
+                        }
+                        else {
+                            write("super(...args);");
+                        }
+                        emitEnd(baseTypeElement);
+                    }
+                }
+                emitPropertyDeclarations(node, getInitializedProperties(node, /*isStatic*/ false));
+                if (ctor) {
+                    var statements = ctor.body.statements;
+                    if (superCall) {
+                        statements = statements.slice(1);
+                    }
+                    emitLinesStartingAt(statements, startIndex);
+                }
+                emitTempDeclarations(/*newLine*/ true);
+                writeLine();
+                if (ctor) {
+                    emitLeadingCommentsOfPosition(ctor.body.statements.end);
+                }
+                decreaseIndent();
+                emitToken(16 /* CloseBraceToken */, ctor ? ctor.body.statements.end : node.members.end);
+                emitEnd(ctor || node);
+                if (ctor) {
+                    emitTrailingComments(ctor);
+                }
+            }
+            function emitClassExpression(node) {
+                return emitClassLikeDeclaration(node);
+            }
+            function emitClassDeclaration(node) {
+                return emitClassLikeDeclaration(node);
+            }
+            function emitClassLikeDeclaration(node) {
+                if (languageVersion < 2 /* ES6 */) {
+                    emitClassLikeDeclarationBelowES6(node);
+                }
+                else {
+                    emitClassLikeDeclarationForES6AndHigher(node);
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile && node.name) {
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            function emitClassLikeDeclarationForES6AndHigher(node) {
+                var decoratedClassAlias;
+                var isHoistedDeclarationInSystemModule = shouldHoistDeclarationInSystemJsModule(node);
+                var isDecorated = ts.nodeIsDecorated(node);
+                var rewriteAsClassExpression = isDecorated || isHoistedDeclarationInSystemModule;
+                if (node.kind === 221 /* ClassDeclaration */) {
+                    if (rewriteAsClassExpression) {
+                        // When we emit an ES6 class that has a class decorator, we must tailor the
+                        // emit to certain specific cases.
+                        //
+                        // In the simplest case, we emit the class declaration as a let declaration, and
+                        // evaluate decorators after the close of the class body:
+                        //
+                        //  TypeScript                      | Javascript
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | let C = class C {
+                        //  class C {                       | }
+                        //  }                               | C = __decorate([dec], C);
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | export let C = class C {
+                        //  export class C {                | }
+                        //  }                               | C = __decorate([dec], C);
+                        //  ---------------------------------------------------------------------
+                        //  [Example 1]
+                        //
+                        // If a class declaration contains a reference to itself *inside* of the class body,
+                        // this introduces two bindings to the class: One outside of the class body, and one
+                        // inside of the class body. If we apply decorators as in [Example 1] above, there
+                        // is the possibility that the decorator `dec` will return a new value for the
+                        // constructor, which would result in the binding inside of the class no longer
+                        // pointing to the same reference as the binding outside of the class.
+                        //
+                        // As a result, we must instead rewrite all references to the class *inside* of the
+                        // class body to instead point to a local temporary alias for the class:
+                        //
+                        //  TypeScript                      | Javascript
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | let C_1 = class C {
+                        //  class C {                       |   static x() { return C_1.y; }
+                        //    static x() { return C.y; }    | }
+                        //    static y = 1;                 | let C = C_1;
+                        //  }                               | C.y = 1;
+                        //                                  | C = C_1 = __decorate([dec], C);
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | let C_1 = class C {
+                        //  export class C {                |   static x() { return C_1.y; }
+                        //    static x() { return C.y; }    | }
+                        //    static y = 1;                 | export let C = C_1;
+                        //  }                               | C.y = 1;
+                        //                                  | C = C_1 = __decorate([dec], C);
+                        //  ---------------------------------------------------------------------
+                        //  [Example 2]
+                        //
+                        // If a class declaration is the default export of a module, we instead emit
+                        // the export after the decorated declaration:
+                        //
+                        //  TypeScript                      | Javascript
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | let default_1 = class {
+                        //  export default class {          | }
+                        //  }                               | default_1 = __decorate([dec], default_1);
+                        //                                  | export default default_1;
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | let C = class C {
+                        //  export default class {          | }
+                        //  }                               | C = __decorate([dec], C);
+                        //                                  | export default C;
+                        //  ---------------------------------------------------------------------
+                        //  [Example 3]
+                        //
+                        // If the class declaration is the default export and a reference to itself
+                        // inside of the class body, we must emit both an alias for the class *and*
+                        // move the export after the declaration:
+                        //
+                        //  TypeScript                      | Javascript
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | let C_1 = class C {
+                        //  export default class C {        |   static x() { return C_1.y; }
+                        //    static x() { return C.y; }    | };
+                        //    static y = 1;                 | let C = C_1;
+                        //  }                               | C.y = 1;
+                        //                                  | C = C_1 = __decorate([dec], C);
+                        //                                  | export default C;
+                        //  ---------------------------------------------------------------------
+                        //  [Example 4]
+                        //
+                        // NOTE: we reuse the same rewriting logic for cases when targeting ES6 and module kind is System.
+                        // Because of hoisting top level class declaration need to be emitted as class expressions.
+                        // Double bind case is only required if node is decorated.
+                        if (isDecorated && resolver.getNodeCheckFlags(node) & 524288 /* ClassWithBodyScopedClassBinding */) {
+                            decoratedClassAlias = ts.unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default"));
+                            decoratedClassAliases[ts.getNodeId(node)] = decoratedClassAlias;
+                        }
+                        if (isES6ExportedDeclaration(node) && !(node.flags & 512 /* Default */) && decoratedClassAlias === undefined) {
+                            write("export ");
+                        }
+                        if (!isHoistedDeclarationInSystemModule) {
+                            write("let ");
+                        }
+                        if (decoratedClassAlias !== undefined) {
+                            write("" + decoratedClassAlias);
+                        }
+                        else {
+                            emitDeclarationName(node);
+                        }
+                        write(" = ");
+                    }
+                    else if (isES6ExportedDeclaration(node)) {
+                        write("export ");
+                        if (node.flags & 512 /* Default */) {
+                            write("default ");
+                        }
+                    }
+                }
+                // If the class has static properties, and it's a class expression, then we'll need
+                // to specialize the emit a bit.  for a class expression of the form:
+                //
+                //      class C { static a = 1; static b = 2; ... }
+                //
+                // We'll emit:
+                //
+                //      (_temp = class C { ... }, _temp.a = 1, _temp.b = 2, _temp)
+                //
+                // This keeps the expression as an expression, while ensuring that the static parts
+                // of it have been initialized by the time it is used.
+                var staticProperties = getInitializedProperties(node, /*isStatic*/ true);
+                var isClassExpressionWithStaticProperties = staticProperties.length > 0 && node.kind === 192 /* ClassExpression */;
+                var tempVariable;
+                if (isClassExpressionWithStaticProperties) {
+                    tempVariable = createAndRecordTempVariable(0 /* Auto */);
+                    write("(");
+                    increaseIndent();
+                    emit(tempVariable);
+                    write(" = ");
+                }
+                write("class");
+                // emit name if
+                // - node has a name
+                // - this is default export with static initializers
+                if (node.name || (node.flags & 512 /* Default */ && (staticProperties.length > 0 || modulekind !== ts.ModuleKind.ES6) && !rewriteAsClassExpression)) {
+                    write(" ");
+                    emitDeclarationName(node);
+                }
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+                if (baseTypeNode) {
+                    write(" extends ");
+                    emit(baseTypeNode.expression);
+                }
+                write(" {");
+                increaseIndent();
+                writeLine();
+                emitConstructor(node, baseTypeNode);
+                emitMemberFunctionsForES6AndHigher(node);
+                decreaseIndent();
+                writeLine();
+                emitToken(16 /* CloseBraceToken */, node.members.end);
+                if (rewriteAsClassExpression) {
+                    if (decoratedClassAlias !== undefined) {
+                        write(";");
+                        writeLine();
+                        if (isES6ExportedDeclaration(node) && !(node.flags & 512 /* Default */)) {
+                            write("export ");
+                        }
+                        write("let ");
+                        emitDeclarationName(node);
+                        write(" = " + decoratedClassAlias);
+                    }
+                    decoratedClassAliases[ts.getNodeId(node)] = undefined;
+                    write(";");
+                }
+                // Emit static property assignment. Because classDeclaration is lexically evaluated,
+                // it is safe to emit static property assignment after classDeclaration
+                // From ES6 specification:
+                //      HasLexicalDeclaration (N) : Determines if the argument identifier has a binding in this environment record that was created using
+                //                                  a lexical declaration such as a LexicalDeclaration or a ClassDeclaration.
+                if (isClassExpressionWithStaticProperties) {
+                    for (var _a = 0, staticProperties_1 = staticProperties; _a < staticProperties_1.length; _a++) {
+                        var property = staticProperties_1[_a];
+                        write(",");
+                        writeLine();
+                        emitPropertyDeclaration(node, property, /*receiver*/ tempVariable, /*isExpression*/ true);
+                    }
+                    write(",");
+                    writeLine();
+                    emit(tempVariable);
+                    decreaseIndent();
+                    write(")");
+                }
+                else {
+                    writeLine();
+                    emitPropertyDeclarations(node, staticProperties);
+                    emitDecoratorsOfClass(node, decoratedClassAlias);
+                }
+                if (!(node.flags & 1 /* Export */)) {
+                    return;
+                }
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    emitExportMemberAssignment(node);
+                }
+                else {
+                    // If this is an exported class, but not on the top level (i.e. on an internal
+                    // module), export it
+                    if (node.flags & 512 /* Default */) {
+                        // if this is a top level default export of decorated class, write the export after the declaration.
+                        if (isDecorated) {
+                            writeLine();
+                            write("export default ");
+                            emitDeclarationName(node);
+                            write(";");
+                        }
+                    }
+                    else if (node.parent.kind !== 256 /* SourceFile */) {
+                        writeLine();
+                        emitStart(node);
+                        emitModuleMemberName(node);
+                        write(" = ");
+                        emitDeclarationName(node);
+                        emitEnd(node);
+                        write(";");
+                    }
+                }
+            }
+            function emitClassLikeDeclarationBelowES6(node) {
+                if (node.kind === 221 /* ClassDeclaration */) {
+                    // source file level classes in system modules are hoisted so 'var's for them are already defined
+                    if (!shouldHoistDeclarationInSystemJsModule(node)) {
+                        write("var ");
+                    }
+                    emitDeclarationName(node);
+                    write(" = ");
+                }
+                write("(function (");
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+                if (baseTypeNode) {
+                    write("_super");
+                }
+                write(") {");
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                var saveComputedPropertyNamesToGeneratedNames = computedPropertyNamesToGeneratedNames;
+                var saveConvertedLoopState = convertedLoopState;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                computedPropertyNamesToGeneratedNames = undefined;
+                increaseIndent();
+                if (baseTypeNode) {
+                    writeLine();
+                    emitStart(baseTypeNode);
+                    write("__extends(");
+                    emitDeclarationName(node);
+                    write(", _super);");
+                    emitEnd(baseTypeNode);
+                }
+                writeLine();
+                emitConstructor(node, baseTypeNode);
+                emitMemberFunctionsForES5AndLower(node);
+                emitPropertyDeclarations(node, getInitializedProperties(node, /*isStatic*/ true));
+                writeLine();
+                emitDecoratorsOfClass(node, /*decoratedClassAlias*/ undefined);
+                writeLine();
+                emitToken(16 /* CloseBraceToken */, node.members.end, function () {
+                    write("return ");
+                    emitDeclarationName(node);
+                });
+                write(";");
+                emitTempDeclarations(/*newLine*/ true);
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+                computedPropertyNamesToGeneratedNames = saveComputedPropertyNamesToGeneratedNames;
+                decreaseIndent();
+                writeLine();
+                emitToken(16 /* CloseBraceToken */, node.members.end);
+                emitStart(node);
+                write("(");
+                if (baseTypeNode) {
+                    emit(baseTypeNode.expression);
+                }
+                write("))");
+                if (node.kind === 221 /* ClassDeclaration */) {
+                    write(";");
+                }
+                emitEnd(node);
+                if (node.kind === 221 /* ClassDeclaration */) {
+                    emitExportMemberAssignment(node);
+                }
+            }
+            function emitClassMemberPrefix(node, member) {
+                emitDeclarationName(node);
+                if (!(member.flags & 32 /* Static */)) {
+                    write(".prototype");
+                }
+            }
+            function emitDecoratorsOfClass(node, decoratedClassAlias) {
+                emitDecoratorsOfMembers(node, /*staticFlag*/ 0);
+                emitDecoratorsOfMembers(node, 32 /* Static */);
+                emitDecoratorsOfConstructor(node, decoratedClassAlias);
+            }
+            function emitDecoratorsOfConstructor(node, decoratedClassAlias) {
+                var decorators = node.decorators;
+                var constructor = ts.getFirstConstructorWithBody(node);
+                var firstParameterDecorator = constructor && ts.forEach(constructor.parameters, function (parameter) { return parameter.decorators; });
+                // skip decoration of the constructor if neither it nor its parameters are decorated
+                if (!decorators && !firstParameterDecorator) {
+                    return;
+                }
+                // Emit the call to __decorate. Given the class:
+                //
+                //   @dec
+                //   class C {
+                //   }
+                //
+                // The emit for the class is:
+                //
+                //   C = __decorate([dec], C);
+                //
+                writeLine();
+                emitStart(node.decorators || firstParameterDecorator);
+                emitDeclarationName(node);
+                if (decoratedClassAlias !== undefined) {
+                    write(" = " + decoratedClassAlias);
+                }
+                write(" = __decorate([");
+                increaseIndent();
+                writeLine();
+                var decoratorCount = decorators ? decorators.length : 0;
+                var argumentsWritten = emitList(decorators, 0, decoratorCount, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ false, /*noTrailingNewLine*/ true, function (decorator) { return emit(decorator.expression); });
+                if (firstParameterDecorator) {
+                    argumentsWritten += emitDecoratorsOfParameters(constructor, /*leadingComma*/ argumentsWritten > 0);
+                }
+                emitSerializedTypeMetadata(node, /*leadingComma*/ argumentsWritten >= 0);
+                decreaseIndent();
+                writeLine();
+                write("], ");
+                emitDeclarationName(node);
+                write(")");
+                emitEnd(node.decorators || firstParameterDecorator);
+                write(";");
+                writeLine();
+            }
+            function emitDecoratorsOfMembers(node, staticFlag) {
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    // only emit members in the correct group
+                    if ((member.flags & 32 /* Static */) !== staticFlag) {
+                        continue;
+                    }
+                    // skip members that cannot be decorated (such as the constructor)
+                    if (!ts.nodeCanBeDecorated(member)) {
+                        continue;
+                    }
+                    // skip an accessor declaration if it is not the first accessor
+                    var decorators = void 0;
+                    var functionLikeMember = void 0;
+                    if (ts.isAccessor(member)) {
+                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
+                        if (member !== accessors.firstAccessor) {
+                            continue;
+                        }
+                        // get the decorators from the first accessor with decorators
+                        decorators = accessors.firstAccessor.decorators;
+                        if (!decorators && accessors.secondAccessor) {
+                            decorators = accessors.secondAccessor.decorators;
+                        }
+                        // we only decorate parameters of the set accessor
+                        functionLikeMember = accessors.setAccessor;
+                    }
+                    else {
+                        decorators = member.decorators;
+                        // we only decorate the parameters here if this is a method
+                        if (member.kind === 147 /* MethodDeclaration */) {
+                            functionLikeMember = member;
+                        }
+                    }
+                    var firstParameterDecorator = functionLikeMember && ts.forEach(functionLikeMember.parameters, function (parameter) { return parameter.decorators; });
+                    // skip a member if it or any of its parameters are not decorated
+                    if (!decorators && !firstParameterDecorator) {
+                        continue;
+                    }
+                    // Emit the call to __decorate. Given the following:
+                    //
+                    //   class C {
+                    //     @dec method(@dec2 x) {}
+                    //     @dec get accessor() {}
+                    //     @dec prop;
+                    //   }
+                    //
+                    // The emit for a method is:
+                    //
+                    //   __decorate([
+                    //       dec,
+                    //       __param(0, dec2),
+                    //       __metadata("design:type", Function),
+                    //       __metadata("design:paramtypes", [Object]),
+                    //       __metadata("design:returntype", void 0)
+                    //   ], C.prototype, "method", undefined);
+                    //
+                    // The emit for an accessor is:
+                    //
+                    //   __decorate([
+                    //       dec
+                    //   ], C.prototype, "accessor", undefined);
+                    //
+                    // The emit for a property is:
+                    //
+                    //   __decorate([
+                    //       dec
+                    //   ], C.prototype, "prop");
+                    //
+                    writeLine();
+                    emitStart(decorators || firstParameterDecorator);
+                    write("__decorate([");
+                    increaseIndent();
+                    writeLine();
+                    var decoratorCount = decorators ? decorators.length : 0;
+                    var argumentsWritten = emitList(decorators, 0, decoratorCount, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ false, /*noTrailingNewLine*/ true, function (decorator) { return emit(decorator.expression); });
+                    if (firstParameterDecorator) {
+                        argumentsWritten += emitDecoratorsOfParameters(functionLikeMember, argumentsWritten > 0);
+                    }
+                    emitSerializedTypeMetadata(member, argumentsWritten > 0);
+                    decreaseIndent();
+                    writeLine();
+                    write("], ");
+                    emitClassMemberPrefix(node, member);
+                    write(", ");
+                    emitExpressionForPropertyName(member.name);
+                    if (languageVersion > 0 /* ES3 */) {
+                        if (member.kind !== 145 /* PropertyDeclaration */) {
+                            // We emit `null` here to indicate to `__decorate` that it can invoke `Object.getOwnPropertyDescriptor` directly.
+                            // We have this extra argument here so that we can inject an explicit property descriptor at a later date.
+                            write(", null");
+                        }
+                        else {
+                            // We emit `void 0` here to indicate to `__decorate` that it can invoke `Object.defineProperty` directly, but that it
+                            // should not invoke `Object.getOwnPropertyDescriptor`.
+                            write(", void 0");
+                        }
+                    }
+                    write(")");
+                    emitEnd(decorators || firstParameterDecorator);
+                    write(";");
+                    writeLine();
+                }
+            }
+            function emitDecoratorsOfParameters(node, leadingComma) {
+                var argumentsWritten = 0;
+                if (node) {
+                    var parameterIndex_1 = 0;
+                    for (var _a = 0, _b = node.parameters; _a < _b.length; _a++) {
+                        var parameter = _b[_a];
+                        if (ts.nodeIsDecorated(parameter)) {
+                            var decorators = parameter.decorators;
+                            argumentsWritten += emitList(decorators, 0, decorators.length, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ leadingComma, /*noTrailingNewLine*/ true, function (decorator) {
+                                write("__param(" + parameterIndex_1 + ", ");
+                                emit(decorator.expression);
+                                write(")");
+                            });
+                            leadingComma = true;
+                        }
+                        parameterIndex_1++;
+                    }
+                }
+                return argumentsWritten;
+            }
+            function shouldEmitTypeMetadata(node) {
+                // This method determines whether to emit the "design:type" metadata based on the node's kind.
+                // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata
+                // compiler option is set.
+                switch (node.kind) {
+                    case 147 /* MethodDeclaration */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 145 /* PropertyDeclaration */:
+                        return true;
+                }
+                return false;
+            }
+            function shouldEmitReturnTypeMetadata(node) {
+                // This method determines whether to emit the "design:returntype" metadata based on the node's kind.
+                // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata
+                // compiler option is set.
+                switch (node.kind) {
+                    case 147 /* MethodDeclaration */:
+                        return true;
+                }
+                return false;
+            }
+            function shouldEmitParamTypesMetadata(node) {
+                // This method determines whether to emit the "design:paramtypes" metadata based on the node's kind.
+                // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata
+                // compiler option is set.
+                switch (node.kind) {
+                    case 221 /* ClassDeclaration */:
+                    case 147 /* MethodDeclaration */:
+                    case 150 /* SetAccessor */:
+                        return true;
+                }
+                return false;
+            }
+            /** Serializes the type of a declaration to an appropriate JS constructor value. Used by the __metadata decorator for a class member. */
+            function emitSerializedTypeOfNode(node) {
+                // serialization of the type of a declaration uses the following rules:
+                //
+                // * The serialized type of a ClassDeclaration is "Function"
+                // * The serialized type of a ParameterDeclaration is the serialized type of its type annotation.
+                // * The serialized type of a PropertyDeclaration is the serialized type of its type annotation.
+                // * The serialized type of an AccessorDeclaration is the serialized type of the return type annotation of its getter or parameter type annotation of its setter.
+                // * The serialized type of any other FunctionLikeDeclaration is "Function".
+                // * The serialized type of any other node is "void 0".
+                //
+                // For rules on serializing type annotations, see `serializeTypeNode`.
+                switch (node.kind) {
+                    case 221 /* ClassDeclaration */:
+                        write("Function");
+                        return;
+                    case 145 /* PropertyDeclaration */:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 142 /* Parameter */:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 149 /* GetAccessor */:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 150 /* SetAccessor */:
+                        emitSerializedTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
+                        return;
+                }
+                if (ts.isFunctionLike(node)) {
+                    write("Function");
+                    return;
+                }
+                write("void 0");
+            }
+            function emitSerializedTypeNode(node) {
+                if (node) {
+                    switch (node.kind) {
+                        case 103 /* VoidKeyword */:
+                            write("void 0");
+                            return;
+                        case 164 /* ParenthesizedType */:
+                            emitSerializedTypeNode(node.type);
+                            return;
+                        case 156 /* FunctionType */:
+                        case 157 /* ConstructorType */:
+                            write("Function");
+                            return;
+                        case 160 /* ArrayType */:
+                        case 161 /* TupleType */:
+                            write("Array");
+                            return;
+                        case 154 /* TypePredicate */:
+                        case 120 /* BooleanKeyword */:
+                            write("Boolean");
+                            return;
+                        case 132 /* StringKeyword */:
+                        case 166 /* StringLiteralType */:
+                            write("String");
+                            return;
+                        case 130 /* NumberKeyword */:
+                            write("Number");
+                            return;
+                        case 133 /* SymbolKeyword */:
+                            write("Symbol");
+                            return;
+                        case 155 /* TypeReference */:
+                            emitSerializedTypeReferenceNode(node);
+                            return;
+                        case 158 /* TypeQuery */:
+                        case 159 /* TypeLiteral */:
+                        case 162 /* UnionType */:
+                        case 163 /* IntersectionType */:
+                        case 117 /* AnyKeyword */:
+                        case 165 /* ThisType */:
+                            break;
+                        default:
+                            ts.Debug.fail("Cannot serialize unexpected type node.");
+                            break;
+                    }
+                }
+                write("Object");
+            }
+            /** Serializes a TypeReferenceNode to an appropriate JS constructor value. Used by the __metadata decorator. */
+            function emitSerializedTypeReferenceNode(node) {
+                var location = node.parent;
+                while (ts.isDeclaration(location) || ts.isTypeNode(location)) {
+                    location = location.parent;
+                }
+                // Clone the type name and parent it to a location outside of the current declaration.
+                var typeName = ts.cloneEntityName(node.typeName, location);
+                var result = resolver.getTypeReferenceSerializationKind(typeName);
+                switch (result) {
+                    case ts.TypeReferenceSerializationKind.Unknown:
+                        var temp = createAndRecordTempVariable(0 /* Auto */);
+                        write("(typeof (");
+                        emitNodeWithoutSourceMap(temp);
+                        write(" = ");
+                        emitEntityNameAsExpression(typeName, /*useFallback*/ true);
+                        write(") === 'function' && ");
+                        emitNodeWithoutSourceMap(temp);
+                        write(") || Object");
+                        break;
+                    case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
+                        emitEntityNameAsExpression(typeName, /*useFallback*/ false);
+                        break;
+                    case ts.TypeReferenceSerializationKind.VoidType:
+                        write("void 0");
+                        break;
+                    case ts.TypeReferenceSerializationKind.BooleanType:
+                        write("Boolean");
+                        break;
+                    case ts.TypeReferenceSerializationKind.NumberLikeType:
+                        write("Number");
+                        break;
+                    case ts.TypeReferenceSerializationKind.StringLikeType:
+                        write("String");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ArrayLikeType:
+                        write("Array");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ESSymbolType:
+                        if (languageVersion < 2 /* ES6 */) {
+                            write("typeof Symbol === 'function' ? Symbol : Object");
+                        }
+                        else {
+                            write("Symbol");
+                        }
+                        break;
+                    case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
+                        write("Function");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ObjectType:
+                        write("Object");
+                        break;
+                }
+            }
+            /** Serializes the parameter types of a function or the constructor of a class. Used by the __metadata decorator for a method or set accessor. */
+            function emitSerializedParameterTypesOfNode(node) {
+                // serialization of parameter types uses the following rules:
+                //
+                // * If the declaration is a class, the parameters of the first constructor with a body are used.
+                // * If the declaration is function-like and has a body, the parameters of the function are used.
+                //
+                // For the rules on serializing the type of each parameter declaration, see `serializeTypeOfDeclaration`.
+                if (node) {
+                    var valueDeclaration = void 0;
+                    if (node.kind === 221 /* ClassDeclaration */) {
+                        valueDeclaration = ts.getFirstConstructorWithBody(node);
+                    }
+                    else if (ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)) {
+                        valueDeclaration = node;
+                    }
+                    if (valueDeclaration) {
+                        var parameters = valueDeclaration.parameters;
+                        var parameterCount = parameters.length;
+                        if (parameterCount > 0) {
+                            for (var i = 0; i < parameterCount; i++) {
+                                if (i > 0) {
+                                    write(", ");
+                                }
+                                if (parameters[i].dotDotDotToken) {
+                                    var parameterType = parameters[i].type;
+                                    if (parameterType.kind === 160 /* ArrayType */) {
+                                        parameterType = parameterType.elementType;
+                                    }
+                                    else if (parameterType.kind === 155 /* TypeReference */ && parameterType.typeArguments && parameterType.typeArguments.length === 1) {
+                                        parameterType = parameterType.typeArguments[0];
+                                    }
+                                    else {
+                                        parameterType = undefined;
+                                    }
+                                    emitSerializedTypeNode(parameterType);
+                                }
+                                else {
+                                    emitSerializedTypeOfNode(parameters[i]);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            /** Serializes the return type of function. Used by the __metadata decorator for a method. */
+            function emitSerializedReturnTypeOfNode(node) {
+                if (node && ts.isFunctionLike(node) && node.type) {
+                    emitSerializedTypeNode(node.type);
+                    return;
+                }
+                write("void 0");
+            }
+            function emitSerializedTypeMetadata(node, writeComma) {
+                // This method emits the serialized type metadata for a decorator target.
+                // The caller should have already tested whether the node has decorators.
+                var argumentsWritten = 0;
+                if (compilerOptions.emitDecoratorMetadata) {
+                    if (shouldEmitTypeMetadata(node)) {
+                        if (writeComma) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:type', ");
+                        emitSerializedTypeOfNode(node);
+                        write(")");
+                        argumentsWritten++;
+                    }
+                    if (shouldEmitParamTypesMetadata(node)) {
+                        if (writeComma || argumentsWritten) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:paramtypes', [");
+                        emitSerializedParameterTypesOfNode(node);
+                        write("])");
+                        argumentsWritten++;
+                    }
+                    if (shouldEmitReturnTypeMetadata(node)) {
+                        if (writeComma || argumentsWritten) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:returntype', ");
+                        emitSerializedReturnTypeOfNode(node);
+                        write(")");
+                        argumentsWritten++;
+                    }
+                }
+                return argumentsWritten;
+            }
+            function emitInterfaceDeclaration(node) {
+                emitCommentsOnNotEmittedNode(node);
+            }
+            function shouldEmitEnumDeclaration(node) {
+                var isConstEnum = ts.isConst(node);
+                return !isConstEnum || compilerOptions.preserveConstEnums || compilerOptions.isolatedModules;
+            }
+            function emitEnumDeclaration(node) {
+                // const enums are completely erased during compilation.
+                if (!shouldEmitEnumDeclaration(node)) {
+                    return;
+                }
+                if (!shouldHoistDeclarationInSystemJsModule(node)) {
+                    // do not emit var if variable was already hoisted
+                    var isES6ExportedEnum = isES6ExportedDeclaration(node);
+                    if (!(node.flags & 1 /* Export */) || (isES6ExportedEnum && isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 224 /* EnumDeclaration */))) {
+                        emitStart(node);
+                        if (isES6ExportedEnum) {
+                            write("export ");
+                        }
+                        write("var ");
+                        emit(node.name);
+                        emitEnd(node);
+                        write(";");
+                    }
+                }
+                writeLine();
+                emitStart(node);
+                write("(function (");
+                emitStart(node.name);
+                write(getGeneratedNameForNode(node));
+                emitEnd(node.name);
+                write(") {");
+                increaseIndent();
+                emitLines(node.members);
+                decreaseIndent();
+                writeLine();
+                emitToken(16 /* CloseBraceToken */, node.members.end);
+                write(")(");
+                emitModuleMemberName(node);
+                write(" || (");
+                emitModuleMemberName(node);
+                write(" = {}));");
+                emitEnd(node);
+                if (!isES6ExportedDeclaration(node) && node.flags & 1 /* Export */ && !shouldHoistDeclarationInSystemJsModule(node)) {
+                    // do not emit var if variable was already hoisted
+                    writeLine();
+                    emitStart(node);
+                    write("var ");
+                    emit(node.name);
+                    write(" = ");
+                    emitModuleMemberName(node);
+                    emitEnd(node);
+                    write(";");
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
+                    if (modulekind === ts.ModuleKind.System && (node.flags & 1 /* Export */)) {
+                        // write the call to exporter for enum
+                        writeLine();
+                        write(exportFunctionForFile + "(\"");
+                        emitDeclarationName(node);
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(");");
+                    }
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            function emitEnumMember(node) {
+                var enumParent = node.parent;
+                emitStart(node);
+                write(getGeneratedNameForNode(enumParent));
+                write("[");
+                write(getGeneratedNameForNode(enumParent));
+                write("[");
+                emitExpressionForPropertyName(node.name);
+                write("] = ");
+                writeEnumMemberDeclarationValue(node);
+                write("] = ");
+                emitExpressionForPropertyName(node.name);
+                emitEnd(node);
+                write(";");
+            }
+            function writeEnumMemberDeclarationValue(member) {
+                var value = resolver.getConstantValue(member);
+                if (value !== undefined) {
+                    write(value.toString());
+                    return;
+                }
+                else if (member.initializer) {
+                    emit(member.initializer);
+                }
+                else {
+                    write("undefined");
+                }
+            }
+            function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
+                if (moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) {
+                    var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
+                    return recursiveInnerModule || moduleDeclaration.body;
+                }
+            }
+            function shouldEmitModuleDeclaration(node) {
+                return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules);
+            }
+            function isModuleMergedWithES6Class(node) {
+                return languageVersion === 2 /* ES6 */ && !!(resolver.getNodeCheckFlags(node) & 32768 /* LexicalModuleMergesWithClass */);
+            }
+            function isFirstDeclarationOfKind(node, declarations, kind) {
+                return !ts.forEach(declarations, function (declaration) { return declaration.kind === kind && declaration.pos < node.pos; });
+            }
+            function emitModuleDeclaration(node) {
+                // Emit only if this module is non-ambient.
+                var shouldEmit = shouldEmitModuleDeclaration(node);
+                if (!shouldEmit) {
+                    return emitCommentsOnNotEmittedNode(node);
+                }
+                var hoistedInDeclarationScope = shouldHoistDeclarationInSystemJsModule(node);
+                var emitVarForModule = !hoistedInDeclarationScope && !isModuleMergedWithES6Class(node);
+                if (emitVarForModule) {
+                    var isES6ExportedNamespace = isES6ExportedDeclaration(node);
+                    if (!isES6ExportedNamespace || isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 225 /* ModuleDeclaration */)) {
+                        emitStart(node);
+                        if (isES6ExportedNamespace) {
+                            write("export ");
+                        }
+                        write("var ");
+                        emit(node.name);
+                        write(";");
+                        emitEnd(node);
+                        writeLine();
+                    }
+                }
+                emitStart(node);
+                write("(function (");
+                emitStart(node.name);
+                write(getGeneratedNameForNode(node));
+                emitEnd(node.name);
+                write(") ");
+                if (node.body.kind === 226 /* ModuleBlock */) {
+                    var saveConvertedLoopState = convertedLoopState;
+                    var saveTempFlags = tempFlags;
+                    var saveTempVariables = tempVariables;
+                    convertedLoopState = undefined;
+                    tempFlags = 0;
+                    tempVariables = undefined;
+                    emit(node.body);
+                    ts.Debug.assert(convertedLoopState === undefined);
+                    convertedLoopState = saveConvertedLoopState;
+                    tempFlags = saveTempFlags;
+                    tempVariables = saveTempVariables;
+                }
+                else {
+                    write("{");
+                    increaseIndent();
+                    emitCaptureThisForNodeIfNecessary(node);
+                    writeLine();
+                    emit(node.body);
+                    decreaseIndent();
+                    writeLine();
+                    var moduleBlock = getInnerMostModuleDeclarationFromDottedModule(node).body;
+                    emitToken(16 /* CloseBraceToken */, moduleBlock.statements.end);
+                }
+                write(")(");
+                // write moduleDecl = containingModule.m only if it is not exported es6 module member
+                if ((node.flags & 1 /* Export */) && !isES6ExportedDeclaration(node)) {
+                    emit(node.name);
+                    write(" = ");
+                }
+                emitModuleMemberName(node);
+                write(" || (");
+                emitModuleMemberName(node);
+                write(" = {}));");
+                emitEnd(node);
+                if (!isES6ExportedDeclaration(node) && node.name.kind === 69 /* Identifier */ && node.parent === currentSourceFile) {
+                    if (modulekind === ts.ModuleKind.System && (node.flags & 1 /* Export */)) {
+                        writeLine();
+                        write(exportFunctionForFile + "(\"");
+                        emitDeclarationName(node);
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(");");
+                    }
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            /*
+             * Some bundlers (SystemJS builder) sometimes want to rename dependencies.
+             * Here we check if alternative name was provided for a given moduleName and return it if possible.
+             */
+            function tryRenameExternalModule(moduleName) {
+                if (renamedDependencies && ts.hasProperty(renamedDependencies, moduleName.text)) {
+                    return "\"" + renamedDependencies[moduleName.text] + "\"";
+                }
+                return undefined;
+            }
+            function emitRequire(moduleName) {
+                if (moduleName.kind === 9 /* StringLiteral */) {
+                    write("require(");
+                    var text = tryRenameExternalModule(moduleName);
+                    if (text) {
+                        write(text);
+                    }
+                    else {
+                        emitStart(moduleName);
+                        emitLiteral(moduleName);
+                        emitEnd(moduleName);
+                    }
+                    emitToken(18 /* CloseParenToken */, moduleName.end);
+                }
+                else {
+                    write("require()");
+                }
+            }
+            function getNamespaceDeclarationNode(node) {
+                if (node.kind === 229 /* ImportEqualsDeclaration */) {
+                    return node;
+                }
+                var importClause = node.importClause;
+                if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                    return importClause.namedBindings;
+                }
+            }
+            function isDefaultImport(node) {
+                return node.kind === 230 /* ImportDeclaration */ && node.importClause && !!node.importClause.name;
+            }
+            function emitExportImportAssignments(node) {
+                if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
+                    emitExportMemberAssignments(node.name);
+                }
+                ts.forEachChild(node, emitExportImportAssignments);
+            }
+            function emitImportDeclaration(node) {
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    return emitExternalImportDeclaration(node);
+                }
+                // ES6 import
+                if (node.importClause) {
+                    var shouldEmitDefaultBindings = resolver.isReferencedAliasDeclaration(node.importClause);
+                    var shouldEmitNamedBindings = node.importClause.namedBindings && resolver.isReferencedAliasDeclaration(node.importClause.namedBindings, /* checkChildren */ true);
+                    if (shouldEmitDefaultBindings || shouldEmitNamedBindings) {
+                        write("import ");
+                        emitStart(node.importClause);
+                        if (shouldEmitDefaultBindings) {
+                            emit(node.importClause.name);
+                            if (shouldEmitNamedBindings) {
+                                write(", ");
+                            }
+                        }
+                        if (shouldEmitNamedBindings) {
+                            emitLeadingComments(node.importClause.namedBindings);
+                            emitStart(node.importClause.namedBindings);
+                            if (node.importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                                write("* as ");
+                                emit(node.importClause.namedBindings.name);
+                            }
+                            else {
+                                write("{ ");
+                                emitExportOrImportSpecifierList(node.importClause.namedBindings.elements, resolver.isReferencedAliasDeclaration);
+                                write(" }");
+                            }
+                            emitEnd(node.importClause.namedBindings);
+                            emitTrailingComments(node.importClause.namedBindings);
+                        }
+                        emitEnd(node.importClause);
+                        write(" from ");
+                        emit(node.moduleSpecifier);
+                        write(";");
+                    }
+                }
+                else {
+                    write("import ");
+                    emit(node.moduleSpecifier);
+                    write(";");
+                }
+            }
+            function emitExternalImportDeclaration(node) {
+                if (ts.contains(externalImports, node)) {
+                    var isExportedImport = node.kind === 229 /* ImportEqualsDeclaration */ && (node.flags & 1 /* Export */) !== 0;
+                    var namespaceDeclaration = getNamespaceDeclarationNode(node);
+                    var varOrConst = (languageVersion <= 1 /* ES5 */) ? "var " : "const ";
+                    if (modulekind !== ts.ModuleKind.AMD) {
+                        emitLeadingComments(node);
+                        emitStart(node);
+                        if (namespaceDeclaration && !isDefaultImport(node)) {
+                            // import x = require("foo")
+                            // import * as x from "foo"
+                            if (!isExportedImport) {
+                                write(varOrConst);
+                            }
+                            ;
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                        }
+                        else {
+                            // import "foo"
+                            // import x from "foo"
+                            // import { x, y } from "foo"
+                            // import d, * as x from "foo"
+                            // import d, { x, y } from "foo"
+                            var isNakedImport = 230 /* ImportDeclaration */ && !node.importClause;
+                            if (!isNakedImport) {
+                                write(varOrConst);
+                                write(getGeneratedNameForNode(node));
+                                write(" = ");
+                            }
+                        }
+                        emitRequire(ts.getExternalModuleName(node));
+                        if (namespaceDeclaration && isDefaultImport(node)) {
+                            // import d, * as x from "foo"
+                            write(", ");
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            write(getGeneratedNameForNode(node));
+                        }
+                        write(";");
+                        emitEnd(node);
+                        emitExportImportAssignments(node);
+                        emitTrailingComments(node);
+                    }
+                    else {
+                        if (isExportedImport) {
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            emit(namespaceDeclaration.name);
+                            write(";");
+                        }
+                        else if (namespaceDeclaration && isDefaultImport(node)) {
+                            // import d, * as x from "foo"
+                            write(varOrConst);
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            write(getGeneratedNameForNode(node));
+                            write(";");
+                        }
+                        emitExportImportAssignments(node);
+                    }
+                }
+            }
+            function emitImportEqualsDeclaration(node) {
+                if (ts.isExternalModuleImportEqualsDeclaration(node)) {
+                    emitExternalImportDeclaration(node);
+                    return;
+                }
+                // preserve old compiler's behavior: emit 'var' for import declaration (even if we do not consider them referenced) when
+                // - current file is not external module
+                // - import declaration is top level and target is value imported by entity name
+                if (resolver.isReferencedAliasDeclaration(node) ||
+                    (!isCurrentFileExternalModule && resolver.isTopLevelValueImportEqualsWithEntityName(node))) {
+                    emitLeadingComments(node);
+                    emitStart(node);
+                    // variable declaration for import-equals declaration can be hoisted in system modules
+                    // in this case 'var' should be omitted and emit should contain only initialization
+                    var variableDeclarationIsHoisted = shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ true);
+                    // is it top level export import v = a.b.c in system module?
+                    // if yes - it needs to be rewritten as exporter('v', v = a.b.c)
+                    var isExported = isSourceFileLevelDeclarationInSystemJsModule(node, /*isExported*/ true);
+                    if (!variableDeclarationIsHoisted) {
+                        ts.Debug.assert(!isExported);
+                        if (isES6ExportedDeclaration(node)) {
+                            write("export ");
+                            write("var ");
+                        }
+                        else if (!(node.flags & 1 /* Export */)) {
+                            write("var ");
+                        }
+                    }
+                    if (isExported) {
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithoutSourceMap(node.name);
+                        write("\", ");
+                    }
+                    emitModuleMemberName(node);
+                    write(" = ");
+                    emit(node.moduleReference);
+                    if (isExported) {
+                        write(")");
+                    }
+                    write(";");
+                    emitEnd(node);
+                    emitExportImportAssignments(node);
+                    emitTrailingComments(node);
+                }
+            }
+            function emitExportDeclaration(node) {
+                ts.Debug.assert(modulekind !== ts.ModuleKind.System);
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    if (node.moduleSpecifier && (!node.exportClause || resolver.isValueAliasDeclaration(node))) {
+                        emitStart(node);
+                        var generatedName = getGeneratedNameForNode(node);
+                        if (node.exportClause) {
+                            // export { x, y, ... } from "foo"
+                            if (modulekind !== ts.ModuleKind.AMD) {
+                                write("var ");
+                                write(generatedName);
+                                write(" = ");
+                                emitRequire(ts.getExternalModuleName(node));
+                                write(";");
+                            }
+                            for (var _a = 0, _b = node.exportClause.elements; _a < _b.length; _a++) {
+                                var specifier = _b[_a];
+                                if (resolver.isValueAliasDeclaration(specifier)) {
+                                    writeLine();
+                                    emitStart(specifier);
+                                    emitContainingModuleName(specifier);
+                                    write(".");
+                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                                    write(" = ");
+                                    write(generatedName);
+                                    write(".");
+                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.propertyName || specifier.name);
+                                    write(";");
+                                    emitEnd(specifier);
+                                }
+                            }
+                        }
+                        else {
+                            // export * from "foo"
+                            if (hasExportStarsToExportValues && resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
+                                writeLine();
+                                write("__export(");
+                                if (modulekind !== ts.ModuleKind.AMD) {
+                                    emitRequire(ts.getExternalModuleName(node));
+                                }
+                                else {
+                                    write(generatedName);
+                                }
+                                write(");");
+                            }
+                        }
+                        emitEnd(node);
+                    }
+                }
+                else {
+                    if (!node.exportClause || resolver.isValueAliasDeclaration(node)) {
+                        write("export ");
+                        if (node.exportClause) {
+                            // export { x, y, ... }
+                            write("{ ");
+                            emitExportOrImportSpecifierList(node.exportClause.elements, resolver.isValueAliasDeclaration);
+                            write(" }");
+                        }
+                        else {
+                            write("*");
+                        }
+                        if (node.moduleSpecifier) {
+                            write(" from ");
+                            emit(node.moduleSpecifier);
+                        }
+                        write(";");
+                    }
+                }
+            }
+            function emitExportOrImportSpecifierList(specifiers, shouldEmit) {
+                ts.Debug.assert(modulekind === ts.ModuleKind.ES6);
+                var needsComma = false;
+                for (var _a = 0, specifiers_1 = specifiers; _a < specifiers_1.length; _a++) {
+                    var specifier = specifiers_1[_a];
+                    if (shouldEmit(specifier)) {
+                        if (needsComma) {
+                            write(", ");
+                        }
+                        if (specifier.propertyName) {
+                            emit(specifier.propertyName);
+                            write(" as ");
+                        }
+                        emit(specifier.name);
+                        needsComma = true;
+                    }
+                }
+            }
+            function emitExportAssignment(node) {
+                if (!node.isExportEquals && resolver.isValueAliasDeclaration(node)) {
+                    if (modulekind === ts.ModuleKind.ES6) {
+                        writeLine();
+                        emitStart(node);
+                        write("export default ");
+                        var expression = node.expression;
+                        emit(expression);
+                        if (expression.kind !== 220 /* FunctionDeclaration */ &&
+                            expression.kind !== 221 /* ClassDeclaration */) {
+                            write(";");
+                        }
+                        emitEnd(node);
+                    }
+                    else {
+                        writeLine();
+                        emitStart(node);
+                        if (modulekind === ts.ModuleKind.System) {
+                            write(exportFunctionForFile + "(\"default\",");
+                            emit(node.expression);
+                            write(")");
+                        }
+                        else {
+                            emitEs6ExportDefaultCompat(node);
+                            emitContainingModuleName(node);
+                            if (languageVersion === 0 /* ES3 */) {
+                                write('["default"] = ');
+                            }
+                            else {
+                                write(".default = ");
+                            }
+                            emit(node.expression);
+                        }
+                        write(";");
+                        emitEnd(node);
+                    }
+                }
+            }
+            function collectExternalModuleInfo(sourceFile) {
+                externalImports = [];
+                exportSpecifiers = {};
+                exportEquals = undefined;
+                hasExportStarsToExportValues = false;
+                for (var _a = 0, _b = sourceFile.statements; _a < _b.length; _a++) {
+                    var node = _b[_a];
+                    switch (node.kind) {
+                        case 230 /* ImportDeclaration */:
+                            if (!node.importClause ||
+                                resolver.isReferencedAliasDeclaration(node.importClause, /*checkChildren*/ true)) {
+                                // import "mod"
+                                // import x from "mod" where x is referenced
+                                // import * as x from "mod" where x is referenced
+                                // import { x, y } from "mod" where at least one import is referenced
+                                externalImports.push(node);
+                            }
+                            break;
+                        case 229 /* ImportEqualsDeclaration */:
+                            if (node.moduleReference.kind === 240 /* ExternalModuleReference */ && resolver.isReferencedAliasDeclaration(node)) {
+                                // import x = require("mod") where x is referenced
+                                externalImports.push(node);
+                            }
+                            break;
+                        case 236 /* ExportDeclaration */:
+                            if (node.moduleSpecifier) {
+                                if (!node.exportClause) {
+                                    // export * from "mod"
+                                    if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
+                                        externalImports.push(node);
+                                        hasExportStarsToExportValues = true;
+                                    }
+                                }
+                                else if (resolver.isValueAliasDeclaration(node)) {
+                                    // export { x, y } from "mod" where at least one export is a value symbol
+                                    externalImports.push(node);
+                                }
+                            }
+                            else {
+                                // export { x, y }
+                                for (var _c = 0, _d = node.exportClause.elements; _c < _d.length; _c++) {
+                                    var specifier = _d[_c];
+                                    var name_30 = (specifier.propertyName || specifier.name).text;
+                                    (exportSpecifiers[name_30] || (exportSpecifiers[name_30] = [])).push(specifier);
+                                }
+                            }
+                            break;
+                        case 235 /* ExportAssignment */:
+                            if (node.isExportEquals && !exportEquals) {
+                                // export = x
+                                exportEquals = node;
+                            }
+                            break;
+                    }
+                }
+            }
+            function emitExportStarHelper() {
+                if (hasExportStarsToExportValues) {
+                    writeLine();
+                    write("function __export(m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function getLocalNameForExternalImport(node) {
+                var namespaceDeclaration = getNamespaceDeclarationNode(node);
+                if (namespaceDeclaration && !isDefaultImport(node)) {
+                    return ts.getTextOfNodeFromSourceText(currentText, namespaceDeclaration.name);
+                }
+                if (node.kind === 230 /* ImportDeclaration */ && node.importClause) {
+                    return getGeneratedNameForNode(node);
+                }
+                if (node.kind === 236 /* ExportDeclaration */ && node.moduleSpecifier) {
+                    return getGeneratedNameForNode(node);
+                }
+            }
+            function getExternalModuleNameText(importNode, emitRelativePathAsModuleName) {
+                if (emitRelativePathAsModuleName) {
+                    var name_31 = getExternalModuleNameFromDeclaration(host, resolver, importNode);
+                    if (name_31) {
+                        return "\"" + name_31 + "\"";
+                    }
+                }
+                var moduleName = ts.getExternalModuleName(importNode);
+                if (moduleName.kind === 9 /* StringLiteral */) {
+                    return tryRenameExternalModule(moduleName) || getLiteralText(moduleName);
+                }
+                return undefined;
+            }
+            function emitVariableDeclarationsForImports() {
+                if (externalImports.length === 0) {
+                    return;
+                }
+                writeLine();
+                var started = false;
+                for (var _a = 0, externalImports_1 = externalImports; _a < externalImports_1.length; _a++) {
+                    var importNode = externalImports_1[_a];
+                    // do not create variable declaration for exports and imports that lack import clause
+                    var skipNode = importNode.kind === 236 /* ExportDeclaration */ ||
+                        (importNode.kind === 230 /* ImportDeclaration */ && !importNode.importClause);
+                    if (skipNode) {
+                        continue;
+                    }
+                    if (!started) {
+                        write("var ");
+                        started = true;
+                    }
+                    else {
+                        write(", ");
+                    }
+                    write(getLocalNameForExternalImport(importNode));
+                }
+                if (started) {
+                    write(";");
+                }
+            }
+            function emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations) {
+                // when resolving exports local exported entries/indirect exported entries in the module
+                // should always win over entries with similar names that were added via star exports
+                // to support this we store names of local/indirect exported entries in a set.
+                // this set is used to filter names brought by star exports.
+                if (!hasExportStarsToExportValues) {
+                    // local names set is needed only in presence of star exports
+                    return undefined;
+                }
+                // local names set should only be added if we have anything exported
+                if (!exportedDeclarations && ts.isEmpty(exportSpecifiers)) {
+                    // no exported declarations (export var ...) or export specifiers (export {x})
+                    // check if we have any non star export declarations.
+                    var hasExportDeclarationWithExportClause = false;
+                    for (var _a = 0, externalImports_2 = externalImports; _a < externalImports_2.length; _a++) {
+                        var externalImport = externalImports_2[_a];
+                        if (externalImport.kind === 236 /* ExportDeclaration */ && externalImport.exportClause) {
+                            hasExportDeclarationWithExportClause = true;
+                            break;
+                        }
+                    }
+                    if (!hasExportDeclarationWithExportClause) {
+                        // we still need to emit exportStar helper
+                        return emitExportStarFunction(/*localNames*/ undefined);
+                    }
+                }
+                var exportedNamesStorageRef = makeUniqueName("exportedNames");
+                writeLine();
+                write("var " + exportedNamesStorageRef + " = {");
+                increaseIndent();
+                var started = false;
+                if (exportedDeclarations) {
+                    for (var i = 0; i < exportedDeclarations.length; i++) {
+                        // write name of exported declaration, i.e 'export var x...'
+                        writeExportedName(exportedDeclarations[i]);
+                    }
+                }
+                if (exportSpecifiers) {
+                    for (var n in exportSpecifiers) {
+                        for (var _b = 0, _c = exportSpecifiers[n]; _b < _c.length; _b++) {
+                            var specifier = _c[_b];
+                            // write name of export specified, i.e. 'export {x}'
+                            writeExportedName(specifier.name);
+                        }
+                    }
+                }
+                for (var _d = 0, externalImports_3 = externalImports; _d < externalImports_3.length; _d++) {
+                    var externalImport = externalImports_3[_d];
+                    if (externalImport.kind !== 236 /* ExportDeclaration */) {
+                        continue;
+                    }
+                    var exportDecl = externalImport;
+                    if (!exportDecl.exportClause) {
+                        // export * from ...
+                        continue;
+                    }
+                    for (var _e = 0, _f = exportDecl.exportClause.elements; _e < _f.length; _e++) {
+                        var element = _f[_e];
+                        // write name of indirectly exported entry, i.e. 'export {x} from ...'
+                        writeExportedName(element.name || element.propertyName);
+                    }
+                }
+                decreaseIndent();
+                writeLine();
+                write("};");
+                return emitExportStarFunction(exportedNamesStorageRef);
+                function emitExportStarFunction(localNames) {
+                    var exportStarFunction = makeUniqueName("exportStar");
+                    writeLine();
+                    // define an export star helper function
+                    write("function " + exportStarFunction + "(m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("var exports = {};");
+                    writeLine();
+                    write("for(var n in m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("if (n !== \"default\"");
+                    if (localNames) {
+                        write("&& !" + localNames + ".hasOwnProperty(n)");
+                    }
+                    write(") exports[n] = m[n];");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                    writeLine();
+                    write(exportFunctionForFile + "(exports);");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                    return exportStarFunction;
+                }
+                function writeExportedName(node) {
+                    // do not record default exports
+                    // they are local to module and never overwritten (explicitly skipped) by star export
+                    if (node.kind !== 69 /* Identifier */ && node.flags & 512 /* Default */) {
+                        return;
+                    }
+                    if (started) {
+                        write(",");
+                    }
+                    else {
+                        started = true;
+                    }
+                    writeLine();
+                    write("'");
+                    if (node.kind === 69 /* Identifier */) {
+                        emitNodeWithCommentsAndWithoutSourcemap(node);
+                    }
+                    else {
+                        emitDeclarationName(node);
+                    }
+                    write("': true");
+                }
+            }
+            function processTopLevelVariableAndFunctionDeclarations(node) {
+                // per ES6 spec:
+                // 15.2.1.16.4 ModuleDeclarationInstantiation() Concrete Method
+                // - var declarations are initialized to undefined - 14.a.ii
+                // - function/generator declarations are instantiated - 16.a.iv
+                // this means that after module is instantiated but before its evaluation
+                // exported functions are already accessible at import sites
+                // in theory we should hoist only exported functions and its dependencies
+                // in practice to simplify things we'll hoist all source level functions and variable declaration
+                // including variables declarations for module and class declarations
+                var hoistedVars;
+                var hoistedFunctionDeclarations;
+                var exportedDeclarations;
+                visit(node);
+                if (hoistedVars) {
+                    writeLine();
+                    write("var ");
+                    var seen = {};
+                    for (var i = 0; i < hoistedVars.length; i++) {
+                        var local = hoistedVars[i];
+                        var name_32 = local.kind === 69 /* Identifier */
+                            ? local
+                            : local.name;
+                        if (name_32) {
+                            // do not emit duplicate entries (in case of declaration merging) in the list of hoisted variables
+                            var text = ts.unescapeIdentifier(name_32.text);
+                            if (ts.hasProperty(seen, text)) {
+                                continue;
+                            }
+                            else {
+                                seen[text] = text;
+                            }
+                        }
+                        if (i !== 0) {
+                            write(", ");
+                        }
+                        if (local.kind === 221 /* ClassDeclaration */ || local.kind === 225 /* ModuleDeclaration */ || local.kind === 224 /* EnumDeclaration */) {
+                            emitDeclarationName(local);
+                        }
+                        else {
+                            emit(local);
+                        }
+                        var flags = ts.getCombinedNodeFlags(local.kind === 69 /* Identifier */ ? local.parent : local);
+                        if (flags & 1 /* Export */) {
+                            if (!exportedDeclarations) {
+                                exportedDeclarations = [];
+                            }
+                            exportedDeclarations.push(local);
+                        }
+                    }
+                    write(";");
+                }
+                if (hoistedFunctionDeclarations) {
+                    for (var _a = 0, hoistedFunctionDeclarations_1 = hoistedFunctionDeclarations; _a < hoistedFunctionDeclarations_1.length; _a++) {
+                        var f = hoistedFunctionDeclarations_1[_a];
+                        writeLine();
+                        emit(f);
+                        if (f.flags & 1 /* Export */) {
+                            if (!exportedDeclarations) {
+                                exportedDeclarations = [];
+                            }
+                            exportedDeclarations.push(f);
+                        }
+                    }
+                }
+                return exportedDeclarations;
+                function visit(node) {
+                    if (node.flags & 2 /* Ambient */) {
+                        return;
+                    }
+                    if (node.kind === 220 /* FunctionDeclaration */) {
+                        if (!hoistedFunctionDeclarations) {
+                            hoistedFunctionDeclarations = [];
+                        }
+                        hoistedFunctionDeclarations.push(node);
+                        return;
+                    }
+                    if (node.kind === 221 /* ClassDeclaration */) {
+                        if (!hoistedVars) {
+                            hoistedVars = [];
+                        }
+                        hoistedVars.push(node);
+                        return;
+                    }
+                    if (node.kind === 224 /* EnumDeclaration */) {
+                        if (shouldEmitEnumDeclaration(node)) {
+                            if (!hoistedVars) {
+                                hoistedVars = [];
+                            }
+                            hoistedVars.push(node);
+                        }
+                        return;
+                    }
+                    if (node.kind === 225 /* ModuleDeclaration */) {
+                        if (shouldEmitModuleDeclaration(node)) {
+                            if (!hoistedVars) {
+                                hoistedVars = [];
+                            }
+                            hoistedVars.push(node);
+                        }
+                        return;
+                    }
+                    if (node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) {
+                        if (shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ false)) {
+                            var name_33 = node.name;
+                            if (name_33.kind === 69 /* Identifier */) {
+                                if (!hoistedVars) {
+                                    hoistedVars = [];
+                                }
+                                hoistedVars.push(name_33);
+                            }
+                            else {
+                                ts.forEachChild(name_33, visit);
+                            }
+                        }
+                        return;
+                    }
+                    if (ts.isInternalModuleImportEqualsDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
+                        if (!hoistedVars) {
+                            hoistedVars = [];
+                        }
+                        hoistedVars.push(node.name);
+                        return;
+                    }
+                    if (ts.isBindingPattern(node)) {
+                        ts.forEach(node.elements, visit);
+                        return;
+                    }
+                    if (!ts.isDeclaration(node)) {
+                        ts.forEachChild(node, visit);
+                    }
+                }
+            }
+            function shouldHoistVariable(node, checkIfSourceFileLevelDecl) {
+                if (checkIfSourceFileLevelDecl && !shouldHoistDeclarationInSystemJsModule(node)) {
+                    return false;
+                }
+                // hoist variable if
+                // - it is not block scoped
+                // - it is top level block scoped
+                // if block scoped variables are nested in some another block then
+                // no other functions can use them except ones that are defined at least in the same block
+                return (ts.getCombinedNodeFlags(node) & 3072 /* BlockScoped */) === 0 ||
+                    ts.getEnclosingBlockScopeContainer(node).kind === 256 /* SourceFile */;
+            }
+            function isCurrentFileSystemExternalModule() {
+                return modulekind === ts.ModuleKind.System && isCurrentFileExternalModule;
+            }
+            function emitSystemModuleBody(node, dependencyGroups, startIndex) {
+                // shape of the body in system modules:
+                // function (exports) {
+                //     <list of local aliases for imports>
+                //     <hoisted function declarations>
+                //     <hoisted variable declarations>
+                //     return {
+                //         setters: [
+                //             <list of setter function for imports>
+                //         ],
+                //         execute: function() {
+                //             <module statements>
+                //         }
+                //     }
+                //     <temp declarations>
+                // }
+                // I.e:
+                // import {x} from 'file1'
+                // var y = 1;
+                // export function foo() { return y + x(); }
+                // console.log(y);
+                // will be transformed to
+                // function(exports) {
+                //     var file1; // local alias
+                //     var y;
+                //     function foo() { return y + file1.x(); }
+                //     exports("foo", foo);
+                //     return {
+                //         setters: [
+                //             function(v) { file1 = v }
+                //         ],
+                //         execute(): function() {
+                //             y = 1;
+                //             console.log(y);
+                //         }
+                //     };
+                // }
+                emitVariableDeclarationsForImports();
+                writeLine();
+                var exportedDeclarations = processTopLevelVariableAndFunctionDeclarations(node);
+                var exportStarFunction = emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations);
+                writeLine();
+                write("return {");
+                increaseIndent();
+                writeLine();
+                emitSetters(exportStarFunction, dependencyGroups);
+                writeLine();
+                emitExecute(node, startIndex);
+                decreaseIndent();
+                writeLine();
+                write("}"); // return
+                emitTempDeclarations(/*newLine*/ true);
+            }
+            function emitSetters(exportStarFunction, dependencyGroups) {
+                write("setters:[");
+                for (var i = 0; i < dependencyGroups.length; i++) {
+                    if (i !== 0) {
+                        write(",");
+                    }
+                    writeLine();
+                    increaseIndent();
+                    var group = dependencyGroups[i];
+                    // derive a unique name for parameter from the first named entry in the group
+                    var parameterName = makeUniqueName(ts.forEach(group, getLocalNameForExternalImport) || "");
+                    write("function (" + parameterName + ") {");
+                    increaseIndent();
+                    for (var _a = 0, group_1 = group; _a < group_1.length; _a++) {
+                        var entry = group_1[_a];
+                        var importVariableName = getLocalNameForExternalImport(entry) || "";
+                        switch (entry.kind) {
+                            case 230 /* ImportDeclaration */:
+                                if (!entry.importClause) {
+                                    // 'import "..."' case
+                                    // module is imported only for side-effects, no emit required
+                                    break;
+                                }
+                            // fall-through
+                            case 229 /* ImportEqualsDeclaration */:
+                                ts.Debug.assert(importVariableName !== "");
+                                writeLine();
+                                // save import into the local
+                                write(importVariableName + " = " + parameterName + ";");
+                                writeLine();
+                                break;
+                            case 236 /* ExportDeclaration */:
+                                ts.Debug.assert(importVariableName !== "");
+                                if (entry.exportClause) {
+                                    // export {a, b as c} from 'foo'
+                                    // emit as:
+                                    // exports_({
+                                    //    "a": _["a"],
+                                    //    "c": _["b"]
+                                    // });
+                                    writeLine();
+                                    write(exportFunctionForFile + "({");
+                                    writeLine();
+                                    increaseIndent();
+                                    for (var i_1 = 0, len = entry.exportClause.elements.length; i_1 < len; i_1++) {
+                                        if (i_1 !== 0) {
+                                            write(",");
+                                            writeLine();
+                                        }
+                                        var e = entry.exportClause.elements[i_1];
+                                        write("\"");
+                                        emitNodeWithCommentsAndWithoutSourcemap(e.name);
+                                        write("\": " + parameterName + "[\"");
+                                        emitNodeWithCommentsAndWithoutSourcemap(e.propertyName || e.name);
+                                        write("\"]");
+                                    }
+                                    decreaseIndent();
+                                    writeLine();
+                                    write("});");
+                                }
+                                else {
+                                    // collectExternalModuleInfo prefilters star exports to keep only ones that export values
+                                    // this means that check 'resolver.moduleExportsSomeValue' is redundant and can be omitted here
+                                    writeLine();
+                                    // export * from 'foo'
+                                    // emit as:
+                                    // exportStar(_foo);
+                                    write(exportStarFunction + "(" + parameterName + ");");
+                                }
+                                writeLine();
+                                break;
+                        }
+                    }
+                    decreaseIndent();
+                    write("}");
+                    decreaseIndent();
+                }
+                write("],");
+            }
+            function emitExecute(node, startIndex) {
+                write("execute: function() {");
+                increaseIndent();
+                writeLine();
+                for (var i = startIndex; i < node.statements.length; i++) {
+                    var statement = node.statements[i];
+                    switch (statement.kind) {
+                        // - function declarations are not emitted because they were already hoisted
+                        // - import declarations are not emitted since they are already handled in setters
+                        // - export declarations with module specifiers are not emitted since they were already written in setters
+                        // - export declarations without module specifiers are emitted preserving the order
+                        case 220 /* FunctionDeclaration */:
+                        case 230 /* ImportDeclaration */:
+                            continue;
+                        case 236 /* ExportDeclaration */:
+                            if (!statement.moduleSpecifier) {
+                                for (var _a = 0, _b = statement.exportClause.elements; _a < _b.length; _a++) {
+                                    var element = _b[_a];
+                                    // write call to exporter function for every export specifier in exports list
+                                    emitExportSpecifierInSystemModule(element);
+                                }
+                            }
+                            continue;
+                        case 229 /* ImportEqualsDeclaration */:
+                            if (!ts.isInternalModuleImportEqualsDeclaration(statement)) {
+                                // - import equals declarations that import external modules are not emitted
+                                continue;
+                            }
+                        // fall-though for import declarations that import internal modules
+                        default:
+                            writeLine();
+                            emit(statement);
+                    }
+                }
+                decreaseIndent();
+                writeLine();
+                write("}"); // execute
+            }
+            function writeModuleName(node, emitRelativePathAsModuleName) {
+                var moduleName = node.moduleName;
+                if (moduleName || (emitRelativePathAsModuleName && (moduleName = getResolvedExternalModuleName(host, node)))) {
+                    write("\"" + moduleName + "\", ");
+                }
+            }
+            function emitSystemModule(node, emitRelativePathAsModuleName) {
+                collectExternalModuleInfo(node);
+                // System modules has the following shape
+                // System.register(['dep-1', ... 'dep-n'], function(exports) {/* module body function */})
+                // 'exports' here is a function 'exports<T>(name: string, value: T): T' that is used to publish exported values.
+                // 'exports' returns its 'value' argument so in most cases expressions
+                // that mutate exported values can be rewritten as:
+                // expr -> exports('name', expr).
+                // The only exception in this rule is postfix unary operators,
+                // see comment to 'emitPostfixUnaryExpression' for more details
+                ts.Debug.assert(!exportFunctionForFile);
+                // make sure that  name of 'exports' function does not conflict with existing identifiers
+                exportFunctionForFile = makeUniqueName("exports");
+                contextObjectForFile = makeUniqueName("context");
+                writeLine();
+                write("System.register(");
+                writeModuleName(node, emitRelativePathAsModuleName);
+                write("[");
+                var groupIndices = {};
+                var dependencyGroups = [];
+                for (var i = 0; i < externalImports.length; i++) {
+                    var text = getExternalModuleNameText(externalImports[i], emitRelativePathAsModuleName);
+                    if (text === undefined) {
+                        continue;
+                    }
+                    // text should be quoted string
+                    // for deduplication purposes in key remove leading and trailing quotes so 'a' and "a" will be considered the same
+                    var key = text.substr(1, text.length - 2);
+                    if (ts.hasProperty(groupIndices, key)) {
+                        // deduplicate/group entries in dependency list by the dependency name
+                        var groupIndex = groupIndices[key];
+                        dependencyGroups[groupIndex].push(externalImports[i]);
+                        continue;
+                    }
+                    else {
+                        groupIndices[key] = dependencyGroups.length;
+                        dependencyGroups.push([externalImports[i]]);
+                    }
+                    if (i !== 0) {
+                        write(", ");
+                    }
+                    write(text);
+                }
+                write("], function(" + exportFunctionForFile + ", " + contextObjectForFile + ") {");
+                writeLine();
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
+                writeLine();
+                write("var __moduleName = " + contextObjectForFile + " && " + contextObjectForFile + ".id;");
+                writeLine();
+                emitEmitHelpers(node);
+                emitCaptureThisForNodeIfNecessary(node);
+                emitSystemModuleBody(node, dependencyGroups, startIndex);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
+                // names of modules with corresponding parameter in the factory function
+                var aliasedModuleNames = [];
+                // names of modules with no corresponding parameters in factory function
+                var unaliasedModuleNames = [];
+                var importAliasNames = []; // names of the parameters in the factory function; these
+                // parameters need to match the indexes of the corresponding
+                // module names in aliasedModuleNames.
+                // Fill in amd-dependency tags
+                for (var _a = 0, _b = node.amdDependencies; _a < _b.length; _a++) {
+                    var amdDependency = _b[_a];
+                    if (amdDependency.name) {
+                        aliasedModuleNames.push('"' + amdDependency.path + '"');
+                        importAliasNames.push(amdDependency.name);
+                    }
+                    else {
+                        unaliasedModuleNames.push('"' + amdDependency.path + '"');
+                    }
+                }
+                for (var _c = 0, externalImports_4 = externalImports; _c < externalImports_4.length; _c++) {
+                    var importNode = externalImports_4[_c];
+                    // Find the name of the external module
+                    var externalModuleName = getExternalModuleNameText(importNode, emitRelativePathAsModuleName);
+                    // Find the name of the module alias, if there is one
+                    var importAliasName = getLocalNameForExternalImport(importNode);
+                    if (includeNonAmdDependencies && importAliasName) {
+                        aliasedModuleNames.push(externalModuleName);
+                        importAliasNames.push(importAliasName);
+                    }
+                    else {
+                        unaliasedModuleNames.push(externalModuleName);
+                    }
+                }
+                return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
+            }
+            function emitAMDDependencies(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
+                // An AMD define function has the following shape:
+                //     define(id?, dependencies?, factory);
+                //
+                // This has the shape of
+                //     define(name, ["module1", "module2"], function (module1Alias) {
+                // The location of the alias in the parameter list in the factory function needs to
+                // match the position of the module name in the dependency list.
+                //
+                // To ensure this is true in cases of modules with no aliases, e.g.:
+                // `import "module"` or `<amd-dependency path= "a.css" />`
+                // we need to add modules without alias names to the end of the dependencies list
+                var dependencyNames = getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName);
+                emitAMDDependencyList(dependencyNames);
+                write(", ");
+                emitAMDFactoryHeader(dependencyNames);
+            }
+            function emitAMDDependencyList(_a) {
+                var aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames;
+                write('["require", "exports"');
+                if (aliasedModuleNames.length) {
+                    write(", ");
+                    write(aliasedModuleNames.join(", "));
+                }
+                if (unaliasedModuleNames.length) {
+                    write(", ");
+                    write(unaliasedModuleNames.join(", "));
+                }
+                write("]");
+            }
+            function emitAMDFactoryHeader(_a) {
+                var importAliasNames = _a.importAliasNames;
+                write("function (require, exports");
+                if (importAliasNames.length) {
+                    write(", ");
+                    write(importAliasNames.join(", "));
+                }
+                write(") {");
+            }
+            function emitAMDModule(node, emitRelativePathAsModuleName) {
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                writeLine();
+                write("define(");
+                writeModuleName(node, emitRelativePathAsModuleName);
+                emitAMDDependencies(node, /*includeNonAmdDependencies*/ true, emitRelativePathAsModuleName);
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(/*emitAsReturn*/ true);
+                emitTempDeclarations(/*newLine*/ true);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function emitCommonJSModule(node) {
+                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(/*emitAsReturn*/ false);
+                emitTempDeclarations(/*newLine*/ true);
+            }
+            function emitUMDModule(node) {
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                var dependencyNames = getAMDDependencyNames(node, /*includeNonAmdDependencies*/ false);
+                // Module is detected first to support Browserify users that load into a browser with an AMD loader
+                writeLines("(function (factory) {\n    if (typeof module === 'object' && typeof module.exports === 'object') {\n        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n    }\n    else if (typeof define === 'function' && define.amd) {\n        define(");
+                emitAMDDependencyList(dependencyNames);
+                write(", factory);");
+                writeLines("    }\n})(");
+                emitAMDFactoryHeader(dependencyNames);
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(/*emitAsReturn*/ true);
+                emitTempDeclarations(/*newLine*/ true);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function emitES6Module(node) {
+                externalImports = undefined;
+                exportSpecifiers = undefined;
+                exportEquals = undefined;
+                hasExportStarsToExportValues = false;
+                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false);
+                emitEmitHelpers(node);
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitTempDeclarations(/*newLine*/ true);
+                // Emit exportDefault if it exists will happen as part
+                // or normal statement emit.
+            }
+            function emitExportEquals(emitAsReturn) {
+                if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) {
+                    writeLine();
+                    emitStart(exportEquals);
+                    write(emitAsReturn ? "return " : "module.exports = ");
+                    emit(exportEquals.expression);
+                    write(";");
+                    emitEnd(exportEquals);
+                }
+            }
+            function emitJsxElement(node) {
+                switch (compilerOptions.jsx) {
+                    case 2 /* React */:
+                        jsxEmitReact(node);
+                        break;
+                    case 1 /* Preserve */:
+                    // Fall back to preserve if None was specified (we'll error earlier)
+                    default:
+                        jsxEmitPreserve(node);
+                        break;
+                }
+            }
+            function trimReactWhitespaceAndApplyEntities(node) {
+                var result = undefined;
+                var text = ts.getTextOfNode(node, /*includeTrivia*/ true);
+                var firstNonWhitespace = 0;
+                var lastNonWhitespace = -1;
+                // JSX trims whitespace at the end and beginning of lines, except that the
+                // start/end of a tag is considered a start/end of a line only if that line is
+                // on the same line as the closing tag. See examples in tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx
+                for (var i = 0; i < text.length; i++) {
+                    var c = text.charCodeAt(i);
+                    if (ts.isLineBreak(c)) {
+                        if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) {
+                            var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1);
+                            result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
+                        }
+                        firstNonWhitespace = -1;
+                    }
+                    else if (!ts.isWhiteSpace(c)) {
+                        lastNonWhitespace = i;
+                        if (firstNonWhitespace === -1) {
+                            firstNonWhitespace = i;
+                        }
+                    }
+                }
+                if (firstNonWhitespace !== -1) {
+                    var part = text.substr(firstNonWhitespace);
+                    result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
+                }
+                if (result) {
+                    // Replace entities like &nbsp;
+                    result = result.replace(/&(\w+);/g, function (s, m) {
+                        if (entities[m] !== undefined) {
+                            var ch = String.fromCharCode(entities[m]);
+                            // &quot; needs to be escaped
+                            return ch === '"' ? "\\\"" : ch;
+                        }
+                        else {
+                            return s;
+                        }
+                    });
+                }
+                return result;
+            }
+            function isJsxChildEmittable(child) {
+                if (child.kind === 248 /* JsxExpression */) {
+                    // Don't emit empty expressions
+                    return !!child.expression;
+                }
+                else if (child.kind === 244 /* JsxText */) {
+                    // Don't emit empty strings
+                    return !!getTextToEmit(child);
+                }
+                return true;
+            }
+            ;
+            function getTextToEmit(node) {
+                switch (compilerOptions.jsx) {
+                    case 2 /* React */:
+                        var text = trimReactWhitespaceAndApplyEntities(node);
+                        if (text === undefined || text.length === 0) {
+                            return undefined;
+                        }
+                        else {
+                            return text;
+                        }
+                    case 1 /* Preserve */:
+                    default:
+                        return ts.getTextOfNode(node, /*includeTrivia*/ true);
+                }
+            }
+            function emitJsxText(node) {
+                switch (compilerOptions.jsx) {
+                    case 2 /* React */:
+                        write('"');
+                        write(trimReactWhitespaceAndApplyEntities(node));
+                        write('"');
+                        break;
+                    case 1 /* Preserve */:
+                    default:
+                        writer.writeLiteral(ts.getTextOfNode(node, /*includeTrivia*/ true));
+                        break;
+                }
+            }
+            function emitJsxExpression(node) {
+                if (node.expression) {
+                    switch (compilerOptions.jsx) {
+                        case 1 /* Preserve */:
+                        default:
+                            write("{");
+                            emit(node.expression);
+                            write("}");
+                            break;
+                        case 2 /* React */:
+                            emit(node.expression);
+                            break;
+                    }
+                }
+            }
+            function isUseStrictPrologue(node) {
+                return node.expression.text === "use strict";
+            }
+            function ensureUseStrictPrologue(startWithNewLine, writeUseStrict) {
+                if (writeUseStrict) {
+                    if (startWithNewLine) {
+                        writeLine();
+                    }
+                    write("\"use strict\";");
+                }
+            }
+            function emitDirectivePrologues(statements, startWithNewLine, ensureUseStrict) {
+                var foundUseStrict = false;
+                for (var i = 0; i < statements.length; i++) {
+                    if (ts.isPrologueDirective(statements[i])) {
+                        if (isUseStrictPrologue(statements[i])) {
+                            foundUseStrict = true;
+                        }
+                        if (startWithNewLine || i > 0) {
+                            writeLine();
+                        }
+                        emit(statements[i]);
+                    }
+                    else {
+                        ensureUseStrictPrologue(startWithNewLine || i > 0, !foundUseStrict && ensureUseStrict);
+                        // return index of the first non prologue directive
+                        return i;
+                    }
+                }
+                ensureUseStrictPrologue(startWithNewLine, !foundUseStrict && ensureUseStrict);
+                return statements.length;
+            }
+            function writeLines(text) {
+                var lines = text.split(/\r\n|\r|\n/g);
+                for (var i = 0; i < lines.length; i++) {
+                    var line = lines[i];
+                    if (line.length) {
+                        writeLine();
+                        write(line);
+                    }
+                }
+            }
+            function emitEmitHelpers(node) {
+                // Only emit helpers if the user did not say otherwise.
+                if (!compilerOptions.noEmitHelpers) {
+                    // Only Emit __extends function when target ES5.
+                    // For target ES6 and above, we can emit classDeclaration as is.
+                    if (languageVersion < 2 /* ES6 */ && !extendsEmitted && node.flags & 262144 /* HasClassExtends */) {
+                        writeLines(extendsHelper);
+                        extendsEmitted = true;
+                    }
+                    if (compilerOptions.jsx !== 1 /* Preserve */ && !assignEmitted && (node.flags & 1073741824 /* HasJsxSpreadAttribute */)) {
+                        writeLines(assignHelper);
+                        assignEmitted = true;
+                    }
+                    if (!decorateEmitted && node.flags & 524288 /* HasDecorators */) {
+                        writeLines(decorateHelper);
+                        if (compilerOptions.emitDecoratorMetadata) {
+                            writeLines(metadataHelper);
+                        }
+                        decorateEmitted = true;
+                    }
+                    if (!paramEmitted && node.flags & 1048576 /* HasParamDecorators */) {
+                        writeLines(paramHelper);
+                        paramEmitted = true;
+                    }
+                    if (!awaiterEmitted && node.flags & 2097152 /* HasAsyncFunctions */) {
+                        writeLines(awaiterHelper);
+                        awaiterEmitted = true;
+                    }
+                }
+            }
+            function emitSourceFileNode(node) {
+                // Start new file on new line
+                writeLine();
+                emitShebang();
+                emitDetachedCommentsAndUpdateCommentsInfo(node);
+                if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
+                    if (isOwnFileEmit || (!ts.isExternalModule(node) && compilerOptions.isolatedModules)) {
+                        var emitModule = moduleEmitDelegates[modulekind] || moduleEmitDelegates[ts.ModuleKind.CommonJS];
+                        emitModule(node);
+                    }
+                    else {
+                        bundleEmitDelegates[modulekind](node, /*emitRelativePathAsModuleName*/ true);
+                    }
+                }
+                else {
+                    // emit prologue directives prior to __extends
+                    var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false);
+                    externalImports = undefined;
+                    exportSpecifiers = undefined;
+                    exportEquals = undefined;
+                    hasExportStarsToExportValues = false;
+                    emitEmitHelpers(node);
+                    emitCaptureThisForNodeIfNecessary(node);
+                    emitLinesStartingAt(node.statements, startIndex);
+                    emitTempDeclarations(/*newLine*/ true);
+                }
+                emitLeadingComments(node.endOfFileToken);
+            }
+            function emit(node) {
+                emitNodeConsideringCommentsOption(node, emitNodeWithSourceMap);
+            }
+            function emitNodeWithCommentsAndWithoutSourcemap(node) {
+                emitNodeConsideringCommentsOption(node, emitNodeWithoutSourceMap);
+            }
+            function emitNodeConsideringCommentsOption(node, emitNodeConsideringSourcemap) {
+                if (node) {
+                    if (node.flags & 2 /* Ambient */) {
+                        return emitCommentsOnNotEmittedNode(node);
+                    }
+                    if (isSpecializedCommentHandling(node)) {
+                        // This is the node that will handle its own comments and sourcemap
+                        return emitNodeWithoutSourceMap(node);
+                    }
+                    var emitComments_1 = shouldEmitLeadingAndTrailingComments(node);
+                    if (emitComments_1) {
+                        emitLeadingComments(node);
+                    }
+                    emitNodeConsideringSourcemap(node);
+                    if (emitComments_1) {
+                        emitTrailingComments(node);
+                    }
+                }
+            }
+            function emitNodeWithSourceMap(node) {
+                if (node) {
+                    emitStart(node);
+                    emitNodeWithoutSourceMap(node);
+                    emitEnd(node);
+                }
+            }
+            function emitNodeWithoutSourceMap(node) {
+                if (node) {
+                    emitJavaScriptWorker(node);
+                }
+            }
+            function changeSourceMapEmit(writer) {
+                sourceMap = writer;
+                emitStart = writer.emitStart;
+                emitEnd = writer.emitEnd;
+                emitPos = writer.emitPos;
+                setSourceFile = writer.setSourceFile;
+            }
+            function withTemporaryNoSourceMap(callback) {
+                var prevSourceMap = sourceMap;
+                setSourceMapWriterEmit(ts.getNullSourceMapWriter());
+                callback();
+                setSourceMapWriterEmit(prevSourceMap);
+            }
+            function isSpecializedCommentHandling(node) {
+                switch (node.kind) {
+                    // All of these entities are emitted in a specialized fashion.  As such, we allow
+                    // the specialized methods for each to handle the comments on the nodes.
+                    case 222 /* InterfaceDeclaration */:
+                    case 220 /* FunctionDeclaration */:
+                    case 230 /* ImportDeclaration */:
+                    case 229 /* ImportEqualsDeclaration */:
+                    case 223 /* TypeAliasDeclaration */:
+                    case 235 /* ExportAssignment */:
+                        return true;
+                }
+            }
+            function shouldEmitLeadingAndTrailingComments(node) {
+                switch (node.kind) {
+                    case 200 /* VariableStatement */:
+                        return shouldEmitLeadingAndTrailingCommentsForVariableStatement(node);
+                    case 225 /* ModuleDeclaration */:
+                        // Only emit the leading/trailing comments for a module if we're actually
+                        // emitting the module as well.
+                        return shouldEmitModuleDeclaration(node);
+                    case 224 /* EnumDeclaration */:
+                        // Only emit the leading/trailing comments for an enum if we're actually
+                        // emitting the module as well.
+                        return shouldEmitEnumDeclaration(node);
+                }
+                // If the node is emitted in specialized fashion, dont emit comments as this node will handle
+                // emitting comments when emitting itself
+                ts.Debug.assert(!isSpecializedCommentHandling(node));
+                // If this is the expression body of an arrow function that we're down-leveling,
+                // then we don't want to emit comments when we emit the body.  It will have already
+                // been taken care of when we emitted the 'return' statement for the function
+                // expression body.
+                if (node.kind !== 199 /* Block */ &&
+                    node.parent &&
+                    node.parent.kind === 180 /* ArrowFunction */ &&
+                    node.parent.body === node &&
+                    languageVersion <= 1 /* ES5 */) {
+                    return false;
+                }
+                // Emit comments for everything else.
+                return true;
+            }
+            function emitJavaScriptWorker(node) {
+                // Check if the node can be emitted regardless of the ScriptTarget
+                switch (node.kind) {
+                    case 69 /* Identifier */:
+                        return emitIdentifier(node);
+                    case 142 /* Parameter */:
+                        return emitParameter(node);
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        return emitMethod(node);
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        return emitAccessor(node);
+                    case 97 /* ThisKeyword */:
+                        return emitThis(node);
+                    case 95 /* SuperKeyword */:
+                        return emitSuper(node);
+                    case 93 /* NullKeyword */:
+                        return write("null");
+                    case 99 /* TrueKeyword */:
+                        return write("true");
+                    case 84 /* FalseKeyword */:
+                        return write("false");
+                    case 8 /* NumericLiteral */:
+                    case 9 /* StringLiteral */:
+                    case 10 /* RegularExpressionLiteral */:
+                    case 11 /* NoSubstitutionTemplateLiteral */:
+                    case 12 /* TemplateHead */:
+                    case 13 /* TemplateMiddle */:
+                    case 14 /* TemplateTail */:
+                        return emitLiteral(node);
+                    case 189 /* TemplateExpression */:
+                        return emitTemplateExpression(node);
+                    case 197 /* TemplateSpan */:
+                        return emitTemplateSpan(node);
+                    case 241 /* JsxElement */:
+                    case 242 /* JsxSelfClosingElement */:
+                        return emitJsxElement(node);
+                    case 244 /* JsxText */:
+                        return emitJsxText(node);
+                    case 248 /* JsxExpression */:
+                        return emitJsxExpression(node);
+                    case 139 /* QualifiedName */:
+                        return emitQualifiedName(node);
+                    case 167 /* ObjectBindingPattern */:
+                        return emitObjectBindingPattern(node);
+                    case 168 /* ArrayBindingPattern */:
+                        return emitArrayBindingPattern(node);
+                    case 169 /* BindingElement */:
+                        return emitBindingElement(node);
+                    case 170 /* ArrayLiteralExpression */:
+                        return emitArrayLiteral(node);
+                    case 171 /* ObjectLiteralExpression */:
+                        return emitObjectLiteral(node);
+                    case 253 /* PropertyAssignment */:
+                        return emitPropertyAssignment(node);
+                    case 254 /* ShorthandPropertyAssignment */:
+                        return emitShorthandPropertyAssignment(node);
+                    case 140 /* ComputedPropertyName */:
+                        return emitComputedPropertyName(node);
+                    case 172 /* PropertyAccessExpression */:
+                        return emitPropertyAccess(node);
+                    case 173 /* ElementAccessExpression */:
+                        return emitIndexedAccess(node);
+                    case 174 /* CallExpression */:
+                        return emitCallExpression(node);
+                    case 175 /* NewExpression */:
+                        return emitNewExpression(node);
+                    case 176 /* TaggedTemplateExpression */:
+                        return emitTaggedTemplateExpression(node);
+                    case 177 /* TypeAssertionExpression */:
+                    case 195 /* AsExpression */:
+                    case 196 /* NonNullExpression */:
+                        return emit(node.expression);
+                    case 178 /* ParenthesizedExpression */:
+                        return emitParenExpression(node);
+                    case 220 /* FunctionDeclaration */:
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                        return emitFunctionDeclaration(node);
+                    case 181 /* DeleteExpression */:
+                        return emitDeleteExpression(node);
+                    case 182 /* TypeOfExpression */:
+                        return emitTypeOfExpression(node);
+                    case 183 /* VoidExpression */:
+                        return emitVoidExpression(node);
+                    case 184 /* AwaitExpression */:
+                        return emitAwaitExpression(node);
+                    case 185 /* PrefixUnaryExpression */:
+                        return emitPrefixUnaryExpression(node);
+                    case 186 /* PostfixUnaryExpression */:
+                        return emitPostfixUnaryExpression(node);
+                    case 187 /* BinaryExpression */:
+                        return emitBinaryExpression(node);
+                    case 188 /* ConditionalExpression */:
+                        return emitConditionalExpression(node);
+                    case 191 /* SpreadElementExpression */:
+                        return emitSpreadElementExpression(node);
+                    case 190 /* YieldExpression */:
+                        return emitYieldExpression(node);
+                    case 193 /* OmittedExpression */:
+                        return;
+                    case 199 /* Block */:
+                    case 226 /* ModuleBlock */:
+                        return emitBlock(node);
+                    case 200 /* VariableStatement */:
+                        return emitVariableStatement(node);
+                    case 201 /* EmptyStatement */:
+                        return write(";");
+                    case 202 /* ExpressionStatement */:
+                        return emitExpressionStatement(node);
+                    case 203 /* IfStatement */:
+                        return emitIfStatement(node);
+                    case 204 /* DoStatement */:
+                        return emitDoStatement(node);
+                    case 205 /* WhileStatement */:
+                        return emitWhileStatement(node);
+                    case 206 /* ForStatement */:
+                        return emitForStatement(node);
+                    case 208 /* ForOfStatement */:
+                    case 207 /* ForInStatement */:
+                        return emitForInOrForOfStatement(node);
+                    case 209 /* ContinueStatement */:
+                    case 210 /* BreakStatement */:
+                        return emitBreakOrContinueStatement(node);
+                    case 211 /* ReturnStatement */:
+                        return emitReturnStatement(node);
+                    case 212 /* WithStatement */:
+                        return emitWithStatement(node);
+                    case 213 /* SwitchStatement */:
+                        return emitSwitchStatement(node);
+                    case 249 /* CaseClause */:
+                    case 250 /* DefaultClause */:
+                        return emitCaseOrDefaultClause(node);
+                    case 214 /* LabeledStatement */:
+                        return emitLabeledStatement(node);
+                    case 215 /* ThrowStatement */:
+                        return emitThrowStatement(node);
+                    case 216 /* TryStatement */:
+                        return emitTryStatement(node);
+                    case 252 /* CatchClause */:
+                        return emitCatchClause(node);
+                    case 217 /* DebuggerStatement */:
+                        return emitDebuggerStatement(node);
+                    case 218 /* VariableDeclaration */:
+                        return emitVariableDeclaration(node);
+                    case 192 /* ClassExpression */:
+                        return emitClassExpression(node);
+                    case 221 /* ClassDeclaration */:
+                        return emitClassDeclaration(node);
+                    case 222 /* InterfaceDeclaration */:
+                        return emitInterfaceDeclaration(node);
+                    case 224 /* EnumDeclaration */:
+                        return emitEnumDeclaration(node);
+                    case 255 /* EnumMember */:
+                        return emitEnumMember(node);
+                    case 225 /* ModuleDeclaration */:
+                        return emitModuleDeclaration(node);
+                    case 230 /* ImportDeclaration */:
+                        return emitImportDeclaration(node);
+                    case 229 /* ImportEqualsDeclaration */:
+                        return emitImportEqualsDeclaration(node);
+                    case 236 /* ExportDeclaration */:
+                        return emitExportDeclaration(node);
+                    case 235 /* ExportAssignment */:
+                        return emitExportAssignment(node);
+                    case 256 /* SourceFile */:
+                        return emitSourceFileNode(node);
+                }
+            }
+            function hasDetachedComments(pos) {
+                return detachedCommentsInfo !== undefined && ts.lastOrUndefined(detachedCommentsInfo).nodePos === pos;
+            }
+            function getLeadingCommentsWithoutDetachedComments() {
+                // get the leading comments from detachedPos
+                var leadingComments = ts.getLeadingCommentRanges(currentText, ts.lastOrUndefined(detachedCommentsInfo).detachedCommentEndPos);
+                if (detachedCommentsInfo.length - 1) {
+                    detachedCommentsInfo.pop();
+                }
+                else {
+                    detachedCommentsInfo = undefined;
+                }
+                return leadingComments;
+            }
+            /**
+             * Determine if the given comment is a triple-slash
+             *
+             * @return true if the comment is a triple-slash comment else false
+             **/
+            function isTripleSlashComment(comment) {
+                // Verify this is /// comment, but do the regexp match only when we first can find /// in the comment text
+                // so that we don't end up computing comment string and doing match for all // comments
+                if (currentText.charCodeAt(comment.pos + 1) === 47 /* slash */ &&
+                    comment.pos + 2 < comment.end &&
+                    currentText.charCodeAt(comment.pos + 2) === 47 /* slash */) {
+                    var textSubStr = currentText.substring(comment.pos, comment.end);
+                    return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) ||
+                        textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ?
+                        true : false;
+                }
+                return false;
+            }
+            function getLeadingCommentsToEmit(node) {
+                // Emit the leading comments only if the parent's pos doesn't match because parent should take care of emitting these comments
+                if (node.parent) {
+                    if (node.parent.kind === 256 /* SourceFile */ || node.pos !== node.parent.pos) {
+                        if (hasDetachedComments(node.pos)) {
+                            // get comments without detached comments
+                            return getLeadingCommentsWithoutDetachedComments();
+                        }
+                        else {
+                            // get the leading comments from the node
+                            return ts.getLeadingCommentRangesOfNodeFromText(node, currentText);
+                        }
+                    }
+                }
+            }
+            function getTrailingCommentsToEmit(node) {
+                // Emit the trailing comments only if the parent's pos doesn't match because parent should take care of emitting these comments
+                if (node.parent) {
+                    if (node.parent.kind === 256 /* SourceFile */ || node.end !== node.parent.end) {
+                        return ts.getTrailingCommentRanges(currentText, node.end);
+                    }
+                }
+            }
+            /**
+             * Emit comments associated with node that will not be emitted into JS file
+             */
+            function emitCommentsOnNotEmittedNode(node) {
+                emitLeadingCommentsWorker(node, /*isEmittedNode*/ false);
+            }
+            function emitLeadingComments(node) {
+                return emitLeadingCommentsWorker(node, /*isEmittedNode*/ true);
+            }
+            function emitLeadingCommentsWorker(node, isEmittedNode) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var leadingComments;
+                if (isEmittedNode) {
+                    leadingComments = getLeadingCommentsToEmit(node);
+                }
+                else {
+                    // If the node will not be emitted in JS, remove all the comments(normal, pinned and ///) associated with the node,
+                    // unless it is a triple slash comment at the top of the file.
+                    // For Example:
+                    //      /// <reference-path ...>
+                    //      declare var x;
+                    //      /// <reference-path ...>
+                    //      interface F {}
+                    //  The first /// will NOT be removed while the second one will be removed even though both node will not be emitted
+                    if (node.pos === 0) {
+                        leadingComments = ts.filter(getLeadingCommentsToEmit(node), isTripleSlashComment);
+                    }
+                }
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, node, leadingComments);
+                // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
+                ts.emitComments(currentText, currentLineMap, writer, leadingComments, /*trailingSeparator*/ true, newLine, writeComment);
+            }
+            function emitTrailingComments(node) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                // Emit the trailing comments only if the parent's end doesn't match
+                var trailingComments = getTrailingCommentsToEmit(node);
+                // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment*/
+                ts.emitComments(currentText, currentLineMap, writer, trailingComments, /*trailingSeparator*/ false, newLine, writeComment);
+            }
+            /**
+             * Emit trailing comments at the position. The term trailing comment is used here to describe following comment:
+             *      x, /comment1/ y
+             *        ^ => pos; the function will emit "comment1" in the emitJS
+             */
+            function emitTrailingCommentsOfPosition(pos) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var trailingComments = ts.getTrailingCommentRanges(currentText, pos);
+                // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment*/
+                ts.emitComments(currentText, currentLineMap, writer, trailingComments, /*trailingSeparator*/ true, newLine, writeComment);
+            }
+            function emitLeadingCommentsOfPositionWorker(pos) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var leadingComments;
+                if (hasDetachedComments(pos)) {
+                    // get comments without detached comments
+                    leadingComments = getLeadingCommentsWithoutDetachedComments();
+                }
+                else {
+                    // get the leading comments from the node
+                    leadingComments = ts.getLeadingCommentRanges(currentText, pos);
+                }
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, { pos: pos, end: pos }, leadingComments);
+                // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
+                ts.emitComments(currentText, currentLineMap, writer, leadingComments, /*trailingSeparator*/ true, newLine, writeComment);
+            }
+            function emitDetachedCommentsAndUpdateCommentsInfo(node) {
+                var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, node, newLine, compilerOptions.removeComments);
+                if (currentDetachedCommentInfo) {
+                    if (detachedCommentsInfo) {
+                        detachedCommentsInfo.push(currentDetachedCommentInfo);
+                    }
+                    else {
+                        detachedCommentsInfo = [currentDetachedCommentInfo];
+                    }
+                }
+            }
+            function writeComment(text, lineMap, writer, comment, newLine) {
+                emitPos(comment.pos);
+                ts.writeCommentRange(text, lineMap, writer, comment, newLine);
+                emitPos(comment.end);
+            }
+            function emitShebang() {
+                var shebang = ts.getShebang(currentText);
+                if (shebang) {
+                    write(shebang);
+                    writeLine();
+                }
+            }
+            var _a, _b;
+        }
+        function emitFile(_a, sourceFiles, isBundledEmit) {
+            var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath;
+            // Make sure not to write js File and source map file if any of them cannot be written
+            if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
+                emitJavaScript(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
+            }
+            else {
+                emitSkipped = true;
+            }
+            if (declarationFilePath) {
+                emitSkipped = ts.writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) || emitSkipped;
+            }
+            if (!emitSkipped && emittedFilesList) {
+                emittedFilesList.push(jsFilePath);
+                if (sourceMapFilePath) {
+                    emittedFilesList.push(sourceMapFilePath);
+                }
+                if (declarationFilePath) {
+                    emittedFilesList.push(declarationFilePath);
+                }
+            }
+        }
+    }
+    ts.emitFiles = emitFiles;
+})(ts || (ts = {}));
+/// <reference path="sys.ts" />
+/// <reference path="emitter.ts" />
+/// <reference path="core.ts" />
+var ts;
+(function (ts) {
+    /* @internal */ ts.programTime = 0;
+    /* @internal */ ts.emitTime = 0;
+    /* @internal */ ts.ioReadTime = 0;
+    /* @internal */ ts.ioWriteTime = 0;
+    /** The version of the TypeScript compiler release */
+    var emptyArray = [];
+    var defaultLibrarySearchPaths = [
+        "types/",
+        "node_modules/",
+        "node_modules/@types/",
+    ];
+    ts.version = "1.9.0";
+    function findConfigFile(searchPath, fileExists) {
+        while (true) {
+            var fileName = ts.combinePaths(searchPath, "tsconfig.json");
+            if (fileExists(fileName)) {
+                return fileName;
+            }
+            var parentPath = ts.getDirectoryPath(searchPath);
+            if (parentPath === searchPath) {
+                break;
+            }
+            searchPath = parentPath;
+        }
+        return undefined;
+    }
+    ts.findConfigFile = findConfigFile;
+    function resolveTripleslashReference(moduleName, containingFile) {
+        var basePath = ts.getDirectoryPath(containingFile);
+        var referencedFileName = ts.isRootedDiskPath(moduleName) ? moduleName : ts.combinePaths(basePath, moduleName);
+        return ts.normalizePath(referencedFileName);
+    }
+    ts.resolveTripleslashReference = resolveTripleslashReference;
+    /* @internal */
+    function computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName) {
+        var commonPathComponents;
+        var failed = ts.forEach(fileNames, function (sourceFile) {
+            // Each file contributes into common source file path
+            var sourcePathComponents = ts.getNormalizedPathComponents(sourceFile, currentDirectory);
+            sourcePathComponents.pop(); // The base file name is not part of the common directory path
+            if (!commonPathComponents) {
+                // first file
+                commonPathComponents = sourcePathComponents;
+                return;
+            }
+            for (var i = 0, n = Math.min(commonPathComponents.length, sourcePathComponents.length); i < n; i++) {
+                if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
+                    if (i === 0) {
+                        // Failed to find any common path component
+                        return true;
+                    }
+                    // New common path found that is 0 -> i-1
+                    commonPathComponents.length = i;
+                    break;
+                }
+            }
+            // If the sourcePathComponents was shorter than the commonPathComponents, truncate to the sourcePathComponents
+            if (sourcePathComponents.length < commonPathComponents.length) {
+                commonPathComponents.length = sourcePathComponents.length;
+            }
+        });
+        // A common path can not be found when paths span multiple drives on windows, for example
+        if (failed) {
+            return "";
+        }
+        if (!commonPathComponents) {
+            return currentDirectory;
+        }
+        return ts.getNormalizedPathFromPathComponents(commonPathComponents);
+    }
+    ts.computeCommonSourceDirectoryOfFilenames = computeCommonSourceDirectoryOfFilenames;
+    function trace(host, message) {
+        host.trace(ts.formatMessage.apply(undefined, arguments));
+    }
+    function isTraceEnabled(compilerOptions, host) {
+        return compilerOptions.traceResolution && host.trace !== undefined;
+    }
+    /* @internal */
+    function hasZeroOrOneAsteriskCharacter(str) {
+        var seenAsterisk = false;
+        for (var i = 0; i < str.length; i++) {
+            if (str.charCodeAt(i) === 42 /* asterisk */) {
+                if (!seenAsterisk) {
+                    seenAsterisk = true;
+                }
+                else {
+                    // have already seen asterisk
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+    ts.hasZeroOrOneAsteriskCharacter = hasZeroOrOneAsteriskCharacter;
+    function createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations) {
+        return { resolvedModule: resolvedFileName ? { resolvedFileName: resolvedFileName, isExternalLibraryImport: isExternalLibraryImport } : undefined, failedLookupLocations: failedLookupLocations };
+    }
+    function moduleHasNonRelativeName(moduleName) {
+        if (ts.isRootedDiskPath(moduleName)) {
+            return false;
+        }
+        var i = moduleName.lastIndexOf("./", 1);
+        var startsWithDotSlashOrDotDotSlash = i === 0 || (i === 1 && moduleName.charCodeAt(0) === 46 /* dot */);
+        return !startsWithDotSlashOrDotDotSlash;
+    }
+    function tryReadTypesSection(packageJsonPath, baseDirectory, state) {
+        var jsonContent;
+        try {
+            var jsonText = state.host.readFile(packageJsonPath);
+            jsonContent = jsonText ? JSON.parse(jsonText) : {};
+        }
+        catch (e) {
+            // gracefully handle if readFile fails or returns not JSON
+            jsonContent = {};
+        }
+        var typesFile;
+        var fieldName;
+        // first try to read content of 'typings' section (backward compatibility)
+        if (jsonContent.typings) {
+            if (typeof jsonContent.typings === "string") {
+                fieldName = "typings";
+                typesFile = jsonContent.typings;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "typings", typeof jsonContent.typings);
+                }
+            }
+        }
+        // then read 'types'
+        if (!typesFile && jsonContent.types) {
+            if (typeof jsonContent.types === "string") {
+                fieldName = "types";
+                typesFile = jsonContent.types;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "types", typeof jsonContent.types);
+                }
+            }
+        }
+        if (typesFile) {
+            var typesFilePath = ts.normalizePath(ts.combinePaths(baseDirectory, typesFile));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, typesFile, typesFilePath);
+            }
+            return typesFilePath;
+        }
+        return undefined;
+    }
+    var typeReferenceExtensions = [".d.ts"];
+    /**
+     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
+     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
+     * is assumed to be the same as root directory of the project.
+     */
+    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
+        var traceEnabled = isTraceEnabled(options, host);
+        var moduleResolutionState = {
+            compilerOptions: options,
+            host: host,
+            skipTsx: true,
+            traceEnabled: traceEnabled
+        };
+        // use typesRoot and fallback to directory that contains tsconfig or current directory if typesRoot is not set
+        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
+        if (traceEnabled) {
+            if (containingFile === undefined) {
+                if (rootDir === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, rootDir);
+                }
+            }
+            else {
+                if (rootDir === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, rootDir);
+                }
+            }
+        }
+        var failedLookupLocations = [];
+        // Check primary library paths
+        if (rootDir !== undefined) {
+            var effectivePrimarySearchPaths = options.typesSearchPaths || defaultLibrarySearchPaths;
+            for (var _i = 0, effectivePrimarySearchPaths_1 = effectivePrimarySearchPaths; _i < effectivePrimarySearchPaths_1.length; _i++) {
+                var searchPath = effectivePrimarySearchPaths_1[_i];
+                var primaryPath = ts.combinePaths(rootDir, searchPath);
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, primaryPath);
+                }
+                var candidate = ts.combinePaths(primaryPath, typeReferenceDirectiveName);
+                var candidateDirectory = ts.getDirectoryPath(candidate);
+                var resolvedFile_1 = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations, !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
+                if (resolvedFile_1) {
+                    if (traceEnabled) {
+                        trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile_1, true);
+                    }
+                    return {
+                        resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile_1 },
+                        failedLookupLocations: failedLookupLocations
+                    };
+                }
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
+            }
+        }
+        var resolvedFile;
+        var initialLocationForSecondaryLookup;
+        if (containingFile) {
+            initialLocationForSecondaryLookup = ts.getDirectoryPath(containingFile);
+        }
+        else {
+            initialLocationForSecondaryLookup = rootDir;
+        }
+        if (initialLocationForSecondaryLookup !== undefined) {
+            // check secondary locations
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
+            }
+            resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState);
+            if (traceEnabled) {
+                if (resolvedFile) {
+                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
+                }
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
+            }
+        }
+        return {
+            resolvedTypeReferenceDirective: resolvedFile
+                ? { primary: false, resolvedFileName: resolvedFile }
+                : undefined,
+            failedLookupLocations: failedLookupLocations
+        };
+    }
+    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
+    function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        if (traceEnabled) {
+            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
+        }
+        var moduleResolution = compilerOptions.moduleResolution;
+        if (moduleResolution === undefined) {
+            moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
+            }
+        }
+        var result;
+        switch (moduleResolution) {
+            case ts.ModuleResolutionKind.NodeJs:
+                result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
+                break;
+            case ts.ModuleResolutionKind.Classic:
+                result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
+                break;
+        }
+        if (traceEnabled) {
+            if (result.resolvedModule) {
+                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
+            }
+            else {
+                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
+            }
+        }
+        return result;
+    }
+    ts.resolveModuleName = resolveModuleName;
+    /**
+     * Any module resolution kind can be augmented with optional settings: 'baseUrl', 'paths' and 'rootDirs' - they are used to
+     * mitigate differences between design time structure of the project and its runtime counterpart so the same import name
+     * can be resolved successfully by TypeScript compiler and runtime module loader.
+     * If these settings are set then loading procedure will try to use them to resolve module name and it can of failure it will
+     * fallback to standard resolution routine.
+     *
+     * - baseUrl - this setting controls how non-relative module names are resolved. If this setting is specified then non-relative
+     * names will be resolved relative to baseUrl: i.e. if baseUrl is '/a/b' then candidate location to resolve module name 'c/d' will
+     * be '/a/b/c/d'
+     * - paths - this setting can only be used when baseUrl is specified. allows to tune how non-relative module names
+     * will be resolved based on the content of the module name.
+     * Structure of 'paths' compiler options
+     * 'paths': {
+     *    pattern-1: [...substitutions],
+     *    pattern-2: [...substitutions],
+     *    ...
+     *    pattern-n: [...substitutions]
+     * }
+     * Pattern here is a string that can contain zero or one '*' character. During module resolution module name will be matched against
+     * all patterns in the list. Matching for patterns that don't contain '*' means that module name must be equal to pattern respecting the case.
+     * If pattern contains '*' then to match pattern "<prefix>*<suffix>" module name must start with the <prefix> and end with <suffix>.
+     * <MatchedStar> denotes part of the module name between <prefix> and <suffix>.
+     * If module name can be matches with multiple patterns then pattern with the longest prefix will be picked.
+     * After selecting pattern we'll use list of substitutions to get candidate locations of the module and the try to load module
+     * from the candidate location.
+     * Substitution is a string that can contain zero or one '*'. To get candidate location from substitution we'll pick every
+     * substitution in the list and replace '*' with <MatchedStar> string. If candidate location is not rooted it
+     * will be converted to absolute using baseUrl.
+     * For example:
+     * baseUrl: /a/b/c
+     * "paths": {
+     *     // match all module names
+     *     "*": [
+     *         "*",        // use matched name as is,
+     *                     // <matched name> will be looked as /a/b/c/<matched name>
+     *
+     *         "folder1/*" // substitution will convert matched name to 'folder1/<matched name>',
+     *                     // since it is not rooted then final candidate location will be /a/b/c/folder1/<matched name>
+     *     ],
+     *     // match module names that start with 'components/'
+     *     "components/*": [ "/root/components/*" ] // substitution will convert /components/folder1/<matched name> to '/root/components/folder1/<matched name>',
+     *                                              // it is rooted so it will be final candidate location
+     * }
+     *
+     * 'rootDirs' allows the project to be spreaded across multiple locations and resolve modules with relative names as if
+     * they were in the same location. For example lets say there are two files
+     * '/local/src/content/file1.ts'
+     * '/shared/components/contracts/src/content/protocols/file2.ts'
+     * After bundling content of '/shared/components/contracts/src' will be merged with '/local/src' so
+     * if file1 has the following import 'import {x} from "./protocols/file2"' it will be resolved successfully in runtime.
+     * 'rootDirs' provides the way to tell compiler that in order to get the whole project it should behave as if content of all
+     * root dirs were merged together.
+     * I.e. for the example above 'rootDirs' will have two entries: [ '/local/src', '/shared/components/contracts/src' ].
+     * Compiler will first convert './protocols/file2' into absolute path relative to the location of containing file:
+     * '/local/src/content/protocols/file2' and try to load it - failure.
+     * Then it will search 'rootDirs' looking for a longest matching prefix of this absolute path and if such prefix is found - absolute path will
+     * be converted to a path relative to found rootDir entry './content/protocols/file2' (*). As a last step compiler will check all remaining
+     * entries in 'rootDirs', use them to build absolute path out of (*) and try to resolve module from this location.
+     */
+    function tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
+        if (moduleHasNonRelativeName(moduleName)) {
+            return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
+        }
+        else {
+            return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
+        }
+    }
+    function tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
+        if (!state.compilerOptions.rootDirs) {
+            return undefined;
+        }
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
+        }
+        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+        var matchedRootDir;
+        var matchedNormalizedPrefix;
+        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
+            var rootDir = _a[_i];
+            // rootDirs are expected to be absolute
+            // in case of tsconfig.json this will happen automatically - compiler will expand relative names
+            // using location of tsconfig.json as base location
+            var normalizedRoot = ts.normalizePath(rootDir);
+            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
+                normalizedRoot += ts.directorySeparator;
+            }
+            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
+                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
+            }
+            if (isLongestMatchingPrefix) {
+                matchedNormalizedPrefix = normalizedRoot;
+                matchedRootDir = rootDir;
+            }
+        }
+        if (matchedNormalizedPrefix) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
+            }
+            var suffix = candidate.substr(matchedNormalizedPrefix.length);
+            // first - try to load from a initial location
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
+            }
+            var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
+            if (resolvedFileName) {
+                return resolvedFileName;
+            }
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
+            }
+            // then try to resolve using remaining entries in rootDirs
+            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
+                var rootDir = _c[_b];
+                if (rootDir === matchedRootDir) {
+                    // skip the initially matched entry
+                    continue;
+                }
+                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
+                }
+                var baseDirectory = ts.getDirectoryPath(candidate_1);
+                var resolvedFileName_1 = loader(candidate_1, supportedExtensions, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
+                if (resolvedFileName_1) {
+                    return resolvedFileName_1;
+                }
+            }
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
+            }
+        }
+        return undefined;
+    }
+    function tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state) {
+        if (!state.compilerOptions.baseUrl) {
+            return undefined;
+        }
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
+        }
+        // string is for exact match
+        var matchedPattern = undefined;
+        if (state.compilerOptions.paths) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
+            }
+            matchedPattern = matchPatternOrExact(ts.getKeys(state.compilerOptions.paths), moduleName);
+        }
+        if (matchedPattern) {
+            var matchedStar = typeof matchedPattern === "string" ? undefined : matchedText(matchedPattern, moduleName);
+            var matchedPatternText = typeof matchedPattern === "string" ? matchedPattern : patternText(matchedPattern);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPatternText);
+            }
+            for (var _i = 0, _a = state.compilerOptions.paths[matchedPatternText]; _i < _a.length; _i++) {
+                var subst = _a[_i];
+                var path = matchedStar ? subst.replace("*", matchedStar) : subst;
+                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
+                }
+                var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+                if (resolvedFileName) {
+                    return resolvedFileName;
+                }
+            }
+            return undefined;
+        }
+        else {
+            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
+            }
+            return loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+        }
+    }
+    /**
+     * patternStrings contains both pattern strings (containing "*") and regular strings.
+     * Return an exact match if possible, or a pattern match, or undefined.
+     * (These are verified by verifyCompilerOptions to have 0 or 1 "*" characters.)
+     */
+    function matchPatternOrExact(patternStrings, candidate) {
+        var patterns = [];
+        for (var _i = 0, patternStrings_1 = patternStrings; _i < patternStrings_1.length; _i++) {
+            var patternString = patternStrings_1[_i];
+            var pattern = tryParsePattern(patternString);
+            if (pattern) {
+                patterns.push(pattern);
+            }
+            else if (patternString === candidate) {
+                // pattern was matched as is - no need to search further
+                return patternString;
+            }
+        }
+        return findBestPatternMatch(patterns, function (_) { return _; }, candidate);
+    }
+    function patternText(_a) {
+        var prefix = _a.prefix, suffix = _a.suffix;
+        return prefix + "*" + suffix;
+    }
+    /**
+     * Given that candidate matches pattern, returns the text matching the '*'.
+     * E.g.: matchedText(tryParsePattern("foo*baz"), "foobarbaz") === "bar"
+     */
+    function matchedText(pattern, candidate) {
+        ts.Debug.assert(isPatternMatch(pattern, candidate));
+        return candidate.substr(pattern.prefix.length, candidate.length - pattern.suffix.length);
+    }
+    /** Return the object corresponding to the best pattern to match `candidate`. */
+    /* @internal */
+    function findBestPatternMatch(values, getPattern, candidate) {
+        var matchedValue = undefined;
+        // use length of prefix as betterness criteria
+        var longestMatchPrefixLength = -1;
+        for (var _i = 0, values_1 = values; _i < values_1.length; _i++) {
+            var v = values_1[_i];
+            var pattern = getPattern(v);
+            if (isPatternMatch(pattern, candidate) && pattern.prefix.length > longestMatchPrefixLength) {
+                longestMatchPrefixLength = pattern.prefix.length;
+                matchedValue = v;
+            }
+        }
+        return matchedValue;
+    }
+    ts.findBestPatternMatch = findBestPatternMatch;
+    function isPatternMatch(_a, candidate) {
+        var prefix = _a.prefix, suffix = _a.suffix;
+        return candidate.length >= prefix.length + suffix.length &&
+            ts.startsWith(candidate, prefix) &&
+            ts.endsWith(candidate, suffix);
+    }
+    /* @internal */
+    function tryParsePattern(pattern) {
+        // This should be verified outside of here and a proper error thrown.
+        ts.Debug.assert(hasZeroOrOneAsteriskCharacter(pattern));
+        var indexOfStar = pattern.indexOf("*");
+        return indexOfStar === -1 ? undefined : {
+            prefix: pattern.substr(0, indexOfStar),
+            suffix: pattern.substr(indexOfStar + 1)
+        };
+    }
+    ts.tryParsePattern = tryParsePattern;
+    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host) {
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var failedLookupLocations = [];
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: false };
+        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName, failedLookupLocations, supportedExtensions, state);
+        var isExternalLibraryImport = false;
+        if (!resolvedFileName) {
+            if (moduleHasNonRelativeName(moduleName)) {
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
+                }
+                resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state);
+                isExternalLibraryImport = resolvedFileName !== undefined;
+            }
+            else {
+                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+            }
+        }
+        if (resolvedFileName && host.realpath) {
+            var originalFileName = resolvedFileName;
+            resolvedFileName = ts.normalizePath(host.realpath(resolvedFileName));
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
+            }
+        }
+        return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
+    }
+    ts.nodeModuleNameResolver = nodeModuleNameResolver;
+    function nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state) {
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
+        }
+        var resolvedFileName = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
+        return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
+    }
+    /* @internal */
+    function directoryProbablyExists(directoryName, host) {
+        // if host does not support 'directoryExists' assume that directory will exist
+        return !host.directoryExists || host.directoryExists(directoryName);
+    }
+    ts.directoryProbablyExists = directoryProbablyExists;
+    /**
+     * @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
+     * in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
+     */
+    function loadModuleFromFile(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
+        // First try to keep/add an extension: importing "./foo.ts" can be matched by a file "./foo.ts", and "./foo" by "./foo.d.ts"
+        var resolvedByAddingOrKeepingExtension = loadModuleFromFileWorker(candidate, extensions, failedLookupLocation, onlyRecordFailures, state);
+        if (resolvedByAddingOrKeepingExtension) {
+            return resolvedByAddingOrKeepingExtension;
+        }
+        // Then try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one, e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
+        if (ts.hasJavaScriptFileExtension(candidate)) {
+            var extensionless = ts.removeFileExtension(candidate);
+            if (state.traceEnabled) {
+                var extension = candidate.substring(extensionless.length);
+                trace(state.host, ts.Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
+            }
+            return loadModuleFromFileWorker(extensionless, extensions, failedLookupLocation, onlyRecordFailures, state);
+        }
+    }
+    function loadModuleFromFileWorker(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
+        if (!onlyRecordFailures) {
+            // check if containing folder exists - if it doesn't then just record failures for all supported extensions without disk probing
+            var directory = ts.getDirectoryPath(candidate);
+            if (directory) {
+                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
+            }
+        }
+        return ts.forEach(extensions, tryLoad);
+        function tryLoad(ext) {
+            if (state.skipTsx && ts.isJsxOrTsxExtension(ext)) {
+                return undefined;
+            }
+            var fileName = ts.fileExtensionIs(candidate, ext) ? candidate : candidate + ext;
+            if (!onlyRecordFailures && state.host.fileExists(fileName)) {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
+                }
+                return fileName;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
+                }
+                failedLookupLocation.push(fileName);
+                return undefined;
+            }
+        }
+    }
+    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocation, onlyRecordFailures, state) {
+        var packageJsonPath = ts.combinePaths(candidate, "package.json");
+        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
+        if (directoryExists && state.host.fileExists(packageJsonPath)) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
+            }
+            var typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
+            if (typesFile) {
+                var result = loadModuleFromFile(typesFile, extensions, failedLookupLocation, !directoryProbablyExists(ts.getDirectoryPath(typesFile), state.host), state);
+                if (result) {
+                    return result;
+                }
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.package_json_does_not_have_types_field);
+                }
+            }
+        }
+        else {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
+            }
+            // record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
+            failedLookupLocation.push(packageJsonPath);
+        }
+        return loadModuleFromFile(ts.combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
+    }
+    function loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) {
+        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
+        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
+        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
+        // Load only typescript files irrespective of allowJs option if loading from node modules
+        var result = loadModuleFromFile(candidate, ts.supportedTypeScriptExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
+        if (result) {
+            return result;
+        }
+        result = loadNodeModuleFromDirectory(ts.supportedTypeScriptExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
+        if (result) {
+            return result;
+        }
+    }
+    function loadModuleFromNodeModules(moduleName, directory, failedLookupLocations, state) {
+        directory = ts.normalizeSlashes(directory);
+        while (true) {
+            var baseName = ts.getBaseFileName(directory);
+            if (baseName !== "node_modules") {
+                var result = 
+                // first: try to load module as-is
+                loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) ||
+                    // second: try to load module from the scope '@types'
+                    loadModuleFromNodeModulesFolder(ts.combinePaths("@types", moduleName), directory, failedLookupLocations, state);
+                if (result) {
+                    return result;
+                }
+            }
+            var parentPath = ts.getDirectoryPath(directory);
+            if (parentPath === directory) {
+                break;
+            }
+            directory = parentPath;
+        }
+        return undefined;
+    }
+    function classicNameResolver(moduleName, containingFile, compilerOptions, host) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: !compilerOptions.jsx };
+        var failedLookupLocations = [];
+        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
+        if (resolvedFileName) {
+            return createResolvedModule(resolvedFileName, /*isExternalLibraryImport*/ false, failedLookupLocations);
+        }
+        var referencedSourceFile;
+        if (moduleHasNonRelativeName(moduleName)) {
+            while (true) {
+                var searchName = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+                if (referencedSourceFile) {
+                    break;
+                }
+                var parentPath = ts.getDirectoryPath(containingDirectory);
+                if (parentPath === containingDirectory) {
+                    break;
+                }
+                containingDirectory = parentPath;
+            }
+        }
+        else {
+            var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+            referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+        }
+        return referencedSourceFile
+            ? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations: failedLookupLocations }
+            : { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
+    }
+    ts.classicNameResolver = classicNameResolver;
+    /* @internal */
+    ts.defaultInitCompilerOptions = {
+        module: ts.ModuleKind.CommonJS,
+        target: 1 /* ES5 */,
+        noImplicitAny: false,
+        sourceMap: false
+    };
+    function createCompilerHost(options, setParentNodes) {
+        var existingDirectories = {};
+        function getCanonicalFileName(fileName) {
+            // if underlying system can distinguish between two files whose names differs only in cases then file name already in canonical form.
+            // otherwise use toLowerCase as a canonical form.
+            return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
+        }
+        // returned by CScript sys environment
+        var unsupportedFileEncodingErrorCode = -2147024809;
+        function getSourceFile(fileName, languageVersion, onError) {
+            var text;
+            try {
+                var start = new Date().getTime();
+                text = ts.sys.readFile(fileName, options.charset);
+                ts.ioReadTime += new Date().getTime() - start;
+            }
+            catch (e) {
+                if (onError) {
+                    onError(e.number === unsupportedFileEncodingErrorCode
+                        ? ts.createCompilerDiagnostic(ts.Diagnostics.Unsupported_file_encoding).messageText
+                        : e.message);
+                }
+                text = "";
+            }
+            return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
+        }
+        function directoryExists(directoryPath) {
+            if (ts.hasProperty(existingDirectories, directoryPath)) {
+                return true;
+            }
+            if (ts.sys.directoryExists(directoryPath)) {
+                existingDirectories[directoryPath] = true;
+                return true;
+            }
+            return false;
+        }
+        function ensureDirectoriesExist(directoryPath) {
+            if (directoryPath.length > ts.getRootLength(directoryPath) && !directoryExists(directoryPath)) {
+                var parentDirectory = ts.getDirectoryPath(directoryPath);
+                ensureDirectoriesExist(parentDirectory);
+                ts.sys.createDirectory(directoryPath);
+            }
+        }
+        var outputFingerprints;
+        function writeFileIfUpdated(fileName, data, writeByteOrderMark) {
+            if (!outputFingerprints) {
+                outputFingerprints = {};
+            }
+            var hash = ts.sys.createHash(data);
+            var mtimeBefore = ts.sys.getModifiedTime(fileName);
+            if (mtimeBefore && ts.hasProperty(outputFingerprints, fileName)) {
+                var fingerprint = outputFingerprints[fileName];
+                // If output has not been changed, and the file has no external modification
+                if (fingerprint.byteOrderMark === writeByteOrderMark &&
+                    fingerprint.hash === hash &&
+                    fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
+                    return;
+                }
+            }
+            ts.sys.writeFile(fileName, data, writeByteOrderMark);
+            var mtimeAfter = ts.sys.getModifiedTime(fileName);
+            outputFingerprints[fileName] = {
+                hash: hash,
+                byteOrderMark: writeByteOrderMark,
+                mtime: mtimeAfter
+            };
+        }
+        function writeFile(fileName, data, writeByteOrderMark, onError) {
+            try {
+                var start = new Date().getTime();
+                ensureDirectoriesExist(ts.getDirectoryPath(ts.normalizePath(fileName)));
+                if (ts.isWatchSet(options) && ts.sys.createHash && ts.sys.getModifiedTime) {
+                    writeFileIfUpdated(fileName, data, writeByteOrderMark);
+                }
+                else {
+                    ts.sys.writeFile(fileName, data, writeByteOrderMark);
+                }
+                ts.ioWriteTime += new Date().getTime() - start;
+            }
+            catch (e) {
+                if (onError) {
+                    onError(e.message);
+                }
+            }
+        }
+        function getDefaultTypeDirectiveNames(rootPath) {
+            var localTypes = ts.combinePaths(rootPath, "types");
+            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
+            var result = [];
+            if (ts.sys.directoryExists(localTypes)) {
+                result = result.concat(ts.sys.getDirectories(localTypes));
+            }
+            if (ts.sys.directoryExists(npmTypes)) {
+                result = result.concat(ts.sys.getDirectories(npmTypes));
+            }
+            return result;
+        }
+        function getDefaultLibLocation() {
+            return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
+        }
+        var newLine = ts.getNewLineCharacter(options);
+        var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
+        return {
+            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
+            getSourceFile: getSourceFile,
+            getDefaultLibLocation: getDefaultLibLocation,
+            getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
+            writeFile: writeFile,
+            getCurrentDirectory: ts.memoize(function () { return ts.sys.getCurrentDirectory(); }),
+            useCaseSensitiveFileNames: function () { return ts.sys.useCaseSensitiveFileNames; },
+            getCanonicalFileName: getCanonicalFileName,
+            getNewLine: function () { return newLine; },
+            fileExists: function (fileName) { return ts.sys.fileExists(fileName); },
+            readFile: function (fileName) { return ts.sys.readFile(fileName); },
+            trace: function (s) { return ts.sys.write(s + newLine); },
+            directoryExists: function (directoryName) { return ts.sys.directoryExists(directoryName); },
+            realpath: realpath
+        };
+    }
+    ts.createCompilerHost = createCompilerHost;
+    function getPreEmitDiagnostics(program, sourceFile, cancellationToken) {
+        var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
+        if (program.getCompilerOptions().declaration) {
+            diagnostics = diagnostics.concat(program.getDeclarationDiagnostics(sourceFile, cancellationToken));
+        }
+        return ts.sortAndDeduplicateDiagnostics(diagnostics);
+    }
+    ts.getPreEmitDiagnostics = getPreEmitDiagnostics;
+    function flattenDiagnosticMessageText(messageText, newLine) {
+        if (typeof messageText === "string") {
+            return messageText;
+        }
+        else {
+            var diagnosticChain = messageText;
+            var result = "";
+            var indent = 0;
+            while (diagnosticChain) {
+                if (indent) {
+                    result += newLine;
+                    for (var i = 0; i < indent; i++) {
+                        result += "  ";
+                    }
+                }
+                result += diagnosticChain.messageText;
+                indent++;
+                diagnosticChain = diagnosticChain.next;
+            }
+            return result;
+        }
+    }
+    ts.flattenDiagnosticMessageText = flattenDiagnosticMessageText;
+    function loadWithLocalCache(names, containingFile, loader) {
+        if (names.length === 0) {
+            return [];
+        }
+        var resolutions = [];
+        var cache = {};
+        for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
+            var name_34 = names_1[_i];
+            var result = void 0;
+            if (ts.hasProperty(cache, name_34)) {
+                result = cache[name_34];
+            }
+            else {
+                result = loader(name_34, containingFile);
+                cache[name_34] = result;
+            }
+            resolutions.push(result);
+        }
+        return resolutions;
+    }
+    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
+        // Use explicit type list from tsconfig.json
+        if (options.types) {
+            return options.types;
+        }
+        // or load all types from the automatic type import fields
+        if (host && host.getDefaultTypeDirectiveNames) {
+            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
+            if (commonRoot) {
+                return host.getDefaultTypeDirectiveNames(commonRoot);
+            }
+        }
+        return undefined;
+    }
+    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
+    function createProgram(rootNames, options, host, oldProgram) {
+        var program;
+        var files = [];
+        var commonSourceDirectory;
+        var diagnosticsProducingTypeChecker;
+        var noDiagnosticsTypeChecker;
+        var classifiableNames;
+        var resolvedTypeReferenceDirectives = {};
+        var fileProcessingDiagnostics = ts.createDiagnosticCollection();
+        var start = new Date().getTime();
+        host = host || createCompilerHost(options);
+        var skipDefaultLib = options.noLib;
+        var programDiagnostics = ts.createDiagnosticCollection();
+        var currentDirectory = host.getCurrentDirectory();
+        var supportedExtensions = ts.getSupportedExtensions(options);
+        // Map storing if there is emit blocking diagnostics for given input
+        var hasEmitBlockingDiagnostics = ts.createFileMap(getCanonicalFileName);
+        var resolveModuleNamesWorker;
+        if (host.resolveModuleNames) {
+            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
+        }
+        else {
+            var loader_1 = function (moduleName, containingFile) { return resolveModuleName(moduleName, containingFile, options, host).resolvedModule; };
+            resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(moduleNames, containingFile, loader_1); };
+        }
+        var resolveTypeReferenceDirectiveNamesWorker;
+        if (host.resolveTypeReferenceDirectives) {
+            resolveTypeReferenceDirectiveNamesWorker = function (typeDirectiveNames, containingFile) { return host.resolveTypeReferenceDirectives(typeDirectiveNames, containingFile); };
+        }
+        else {
+            var loader_2 = function (typesRef, containingFile) { return resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective; };
+            resolveTypeReferenceDirectiveNamesWorker = function (typeReferenceDirectiveNames, containingFile) { return loadWithLocalCache(typeReferenceDirectiveNames, containingFile, loader_2); };
+        }
+        var filesByName = ts.createFileMap();
+        // stores 'filename -> file association' ignoring case
+        // used to track cases when two file names differ only in casing
+        var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
+        if (!tryReuseStructureFromOldProgram()) {
+            ts.forEach(rootNames, function (name) { return processRootFile(name, /*isDefaultLib*/ false); });
+            // load type declarations specified via 'types' argument
+            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
+            if (typeReferences) {
+                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, /*containingFile*/ undefined);
+                for (var i = 0; i < typeReferences.length; i++) {
+                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
+                }
+            }
+            // Do not process the default library if:
+            //  - The '--noLib' flag is used.
+            //  - A 'no-default-lib' reference comment is encountered in
+            //      processing the root files.
+            if (!skipDefaultLib) {
+                // If '--lib' is not specified, include default library file according to '--target'
+                // otherwise, using options specified in '--lib' instead of '--target' default library file
+                if (!options.lib) {
+                    processRootFile(host.getDefaultLibFileName(options), /*isDefaultLib*/ true);
+                }
+                else {
+                    var libDirectory_1 = host.getDefaultLibLocation ? host.getDefaultLibLocation() : ts.getDirectoryPath(host.getDefaultLibFileName(options));
+                    ts.forEach(options.lib, function (libFileName) {
+                        processRootFile(ts.combinePaths(libDirectory_1, libFileName), /*isDefaultLib*/ true);
+                    });
+                }
+            }
+        }
+        // unconditionally set oldProgram to undefined to prevent it from being captured in closure
+        oldProgram = undefined;
+        program = {
+            getRootFileNames: function () { return rootNames; },
+            getSourceFile: getSourceFile,
+            getSourceFileByPath: getSourceFileByPath,
+            getSourceFiles: function () { return files; },
+            getCompilerOptions: function () { return options; },
+            getSyntacticDiagnostics: getSyntacticDiagnostics,
+            getOptionsDiagnostics: getOptionsDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getSemanticDiagnostics: getSemanticDiagnostics,
+            getDeclarationDiagnostics: getDeclarationDiagnostics,
+            getTypeChecker: getTypeChecker,
+            getClassifiableNames: getClassifiableNames,
+            getDiagnosticsProducingTypeChecker: getDiagnosticsProducingTypeChecker,
+            getCommonSourceDirectory: getCommonSourceDirectory,
+            emit: emit,
+            getCurrentDirectory: function () { return currentDirectory; },
+            getNodeCount: function () { return getDiagnosticsProducingTypeChecker().getNodeCount(); },
+            getIdentifierCount: function () { return getDiagnosticsProducingTypeChecker().getIdentifierCount(); },
+            getSymbolCount: function () { return getDiagnosticsProducingTypeChecker().getSymbolCount(); },
+            getTypeCount: function () { return getDiagnosticsProducingTypeChecker().getTypeCount(); },
+            getFileProcessingDiagnostics: function () { return fileProcessingDiagnostics; },
+            getResolvedTypeReferenceDirectives: function () { return resolvedTypeReferenceDirectives; }
+        };
+        verifyCompilerOptions();
+        ts.programTime += new Date().getTime() - start;
+        return program;
+        function getCommonSourceDirectory() {
+            if (typeof commonSourceDirectory === "undefined") {
+                if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
+                    // If a rootDir is specified and is valid use it as the commonSourceDirectory
+                    commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
+                }
+                else {
+                    commonSourceDirectory = computeCommonSourceDirectory(files);
+                }
+                if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
+                    // Make sure directory path ends with directory separator so this string can directly
+                    // used to replace with "" to get the relative path of the source file and the relative path doesn't
+                    // start with / making it rooted path
+                    commonSourceDirectory += ts.directorySeparator;
+                }
+            }
+            return commonSourceDirectory;
+        }
+        function getClassifiableNames() {
+            if (!classifiableNames) {
+                // Initialize a checker so that all our files are bound.
+                getTypeChecker();
+                classifiableNames = {};
+                for (var _i = 0, files_3 = files; _i < files_3.length; _i++) {
+                    var sourceFile = files_3[_i];
+                    ts.copyMap(sourceFile.classifiableNames, classifiableNames);
+                }
+            }
+            return classifiableNames;
+        }
+        function tryReuseStructureFromOldProgram() {
+            if (!oldProgram) {
+                return false;
+            }
+            // check properties that can affect structure of the program or module resolution strategy
+            // if any of these properties has changed - structure cannot be reused
+            var oldOptions = oldProgram.getCompilerOptions();
+            if ((oldOptions.module !== options.module) ||
+                (oldOptions.moduleResolution !== options.moduleResolution) ||
+                (oldOptions.noResolve !== options.noResolve) ||
+                (oldOptions.target !== options.target) ||
+                (oldOptions.noLib !== options.noLib) ||
+                (oldOptions.jsx !== options.jsx) ||
+                (oldOptions.allowJs !== options.allowJs) ||
+                (oldOptions.rootDir !== options.rootDir) ||
+                (oldOptions.typesSearchPaths !== options.typesSearchPaths) ||
+                (oldOptions.configFilePath !== options.configFilePath) ||
+                (oldOptions.baseUrl !== options.baseUrl) ||
+                (oldOptions.typesRoot !== options.typesRoot) ||
+                !ts.arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
+                !ts.mapIsEqualTo(oldOptions.paths, options.paths)) {
+                return false;
+            }
+            ts.Debug.assert(!oldProgram.structureIsReused);
+            // there is an old program, check if we can reuse its structure
+            var oldRootNames = oldProgram.getRootFileNames();
+            if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
+                return false;
+            }
+            if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
+                return false;
+            }
+            // check if program source files has changed in the way that can affect structure of the program
+            var newSourceFiles = [];
+            var filePaths = [];
+            var modifiedSourceFiles = [];
+            for (var _i = 0, _a = oldProgram.getSourceFiles(); _i < _a.length; _i++) {
+                var oldSourceFile = _a[_i];
+                var newSourceFile = host.getSourceFileByPath
+                    ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target)
+                    : host.getSourceFile(oldSourceFile.fileName, options.target);
+                if (!newSourceFile) {
+                    return false;
+                }
+                newSourceFile.path = oldSourceFile.path;
+                filePaths.push(newSourceFile.path);
+                if (oldSourceFile !== newSourceFile) {
+                    if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
+                        // value of no-default-lib has changed
+                        // this will affect if default library is injected into the list of files
+                        return false;
+                    }
+                    // check tripleslash references
+                    if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
+                        // tripleslash references has changed
+                        return false;
+                    }
+                    // check imports and module augmentations
+                    collectExternalModuleReferences(newSourceFile);
+                    if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
+                        // imports has changed
+                        return false;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
+                        // moduleAugmentations has changed
+                        return false;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
+                        // 'types' references has changed
+                        return false;
+                    }
+                    var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
+                    if (resolveModuleNamesWorker) {
+                        var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
+                        var resolutions = resolveModuleNamesWorker(moduleNames, newSourceFilePath);
+                        // ensure that module resolution results are still correct
+                        var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
+                        if (resolutionsChanged) {
+                            return false;
+                        }
+                    }
+                    if (resolveTypeReferenceDirectiveNamesWorker) {
+                        var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
+                        var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
+                        // ensure that types resolutions are still correct
+                        var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
+                        if (resolutionsChanged) {
+                            return false;
+                        }
+                    }
+                    // pass the cache of module/types resolutions from the old source file
+                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
+                    newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
+                    modifiedSourceFiles.push(newSourceFile);
+                }
+                else {
+                    // file has no changes - use it as is
+                    newSourceFile = oldSourceFile;
+                }
+                // if file has passed all checks it should be safe to reuse it
+                newSourceFiles.push(newSourceFile);
+            }
+            // update fileName -> file mapping
+            for (var i = 0, len = newSourceFiles.length; i < len; i++) {
+                filesByName.set(filePaths[i], newSourceFiles[i]);
+            }
+            files = newSourceFiles;
+            fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
+            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
+                var modifiedFile = modifiedSourceFiles_1[_b];
+                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile);
+            }
+            resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
+            oldProgram.structureIsReused = true;
+            return true;
+        }
+        function getEmitHost(writeFileCallback) {
+            return {
+                getCanonicalFileName: getCanonicalFileName,
+                getCommonSourceDirectory: program.getCommonSourceDirectory,
+                getCompilerOptions: program.getCompilerOptions,
+                getCurrentDirectory: function () { return currentDirectory; },
+                getNewLine: function () { return host.getNewLine(); },
+                getSourceFile: program.getSourceFile,
+                getSourceFileByPath: program.getSourceFileByPath,
+                getSourceFiles: program.getSourceFiles,
+                writeFile: writeFileCallback || (function (fileName, data, writeByteOrderMark, onError, sourceFiles) { return host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles); }),
+                isEmitBlocked: isEmitBlocked
+            };
+        }
+        function getDiagnosticsProducingTypeChecker() {
+            return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ true));
+        }
+        function getTypeChecker() {
+            return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ false));
+        }
+        function emit(sourceFile, writeFileCallback, cancellationToken) {
+            var _this = this;
+            return runWithCancellationToken(function () { return emitWorker(_this, sourceFile, writeFileCallback, cancellationToken); });
+        }
+        function isEmitBlocked(emitFileName) {
+            return hasEmitBlockingDiagnostics.contains(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName));
+        }
+        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken) {
+            var declarationDiagnostics = [];
+            if (options.noEmit) {
+                return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
+            }
+            // If the noEmitOnError flag is set, then check if we have any errors so far.  If so,
+            // immediately bail out.  Note that we pass 'undefined' for 'sourceFile' so that we
+            // get any preEmit diagnostics, not just the ones
+            if (options.noEmitOnError) {
+                var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
+                if (diagnostics.length === 0 && program.getCompilerOptions().declaration) {
+                    declarationDiagnostics = program.getDeclarationDiagnostics(/*sourceFile*/ undefined, cancellationToken);
+                }
+                if (diagnostics.length > 0 || declarationDiagnostics.length > 0) {
+                    return {
+                        diagnostics: ts.concatenate(diagnostics, declarationDiagnostics),
+                        sourceMaps: undefined,
+                        emittedFiles: undefined,
+                        emitSkipped: true
+                    };
+                }
+            }
+            // Create the emit resolver outside of the "emitTime" tracking code below.  That way
+            // any cost associated with it (like type checking) are appropriate associated with
+            // the type-checking counter.
+            //
+            // If the -out option is specified, we should not pass the source file to getEmitResolver.
+            // This is because in the -out scenario all files need to be emitted, and therefore all
+            // files need to be type checked. And the way to specify that all files need to be type
+            // checked is to not pass the file to getEmitResolver.
+            var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile);
+            var start = new Date().getTime();
+            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile);
+            ts.emitTime += new Date().getTime() - start;
+            return emitResult;
+        }
+        function getSourceFile(fileName) {
+            return getSourceFileByPath(ts.toPath(fileName, currentDirectory, getCanonicalFileName));
+        }
+        function getSourceFileByPath(path) {
+            return filesByName.get(path);
+        }
+        function getDiagnosticsHelper(sourceFile, getDiagnostics, cancellationToken) {
+            if (sourceFile) {
+                return getDiagnostics(sourceFile, cancellationToken);
+            }
+            var allDiagnostics = [];
+            ts.forEach(program.getSourceFiles(), function (sourceFile) {
+                if (cancellationToken) {
+                    cancellationToken.throwIfCancellationRequested();
+                }
+                ts.addRange(allDiagnostics, getDiagnostics(sourceFile, cancellationToken));
+            });
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function getSyntacticDiagnostics(sourceFile, cancellationToken) {
+            return getDiagnosticsHelper(sourceFile, getSyntacticDiagnosticsForFile, cancellationToken);
+        }
+        function getSemanticDiagnostics(sourceFile, cancellationToken) {
+            return getDiagnosticsHelper(sourceFile, getSemanticDiagnosticsForFile, cancellationToken);
+        }
+        function getDeclarationDiagnostics(sourceFile, cancellationToken) {
+            var options = program.getCompilerOptions();
+            // collect diagnostics from the program only once if either no source file was specified or out/outFile is set (bundled emit)
+            if (!sourceFile || options.out || options.outFile) {
+                return getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+            }
+            else {
+                return getDiagnosticsHelper(sourceFile, getDeclarationDiagnosticsForFile, cancellationToken);
+            }
+        }
+        function getSyntacticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return sourceFile.parseDiagnostics;
+        }
+        function runWithCancellationToken(func) {
+            try {
+                return func();
+            }
+            catch (e) {
+                if (e instanceof ts.OperationCanceledException) {
+                    // We were canceled while performing the operation.  Because our type checker
+                    // might be a bad state, we need to throw it away.
+                    //
+                    // Note: we are overly aggressive here.  We do not actually *have* to throw away
+                    // the "noDiagnosticsTypeChecker".  However, for simplicity, i'd like to keep
+                    // the lifetimes of these two TypeCheckers the same.  Also, we generally only
+                    // cancel when the user has made a change anyways.  And, in that case, we (the
+                    // program instance) will get thrown away anyways.  So trying to keep one of
+                    // these type checkers alive doesn't serve much purpose.
+                    noDiagnosticsTypeChecker = undefined;
+                    diagnosticsProducingTypeChecker = undefined;
+                }
+                throw e;
+            }
+        }
+        function getSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var typeChecker = getDiagnosticsProducingTypeChecker();
+                ts.Debug.assert(!!sourceFile.bindDiagnostics);
+                var bindDiagnostics = sourceFile.bindDiagnostics;
+                // For JavaScript files, we don't want to report the normal typescript semantic errors.
+                // Instead, we just report errors for using TypeScript-only constructs from within a
+                // JavaScript file.
+                var checkDiagnostics = ts.isSourceFileJavaScript(sourceFile) ?
+                    getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) :
+                    typeChecker.getDiagnostics(sourceFile, cancellationToken);
+                var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
+                var programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
+                return bindDiagnostics.concat(checkDiagnostics).concat(fileProcessingDiagnosticsInFile).concat(programDiagnosticsInFile);
+            });
+        }
+        function getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var diagnostics = [];
+                walk(sourceFile);
+                return diagnostics;
+                function walk(node) {
+                    if (!node) {
+                        return false;
+                    }
+                    switch (node.kind) {
+                        case 229 /* ImportEqualsDeclaration */:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 235 /* ExportAssignment */:
+                            if (node.isExportEquals) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 221 /* ClassDeclaration */:
+                            var classDeclaration = node;
+                            if (checkModifiers(classDeclaration.modifiers) ||
+                                checkTypeParameters(classDeclaration.typeParameters)) {
+                                return true;
+                            }
+                            break;
+                        case 251 /* HeritageClause */:
+                            var heritageClause = node;
+                            if (heritageClause.token === 106 /* ImplementsKeyword */) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 222 /* InterfaceDeclaration */:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 225 /* ModuleDeclaration */:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 223 /* TypeAliasDeclaration */:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 147 /* MethodDeclaration */:
+                        case 146 /* MethodSignature */:
+                        case 148 /* Constructor */:
+                        case 149 /* GetAccessor */:
+                        case 150 /* SetAccessor */:
+                        case 179 /* FunctionExpression */:
+                        case 220 /* FunctionDeclaration */:
+                        case 180 /* ArrowFunction */:
+                        case 220 /* FunctionDeclaration */:
+                            var functionDeclaration = node;
+                            if (checkModifiers(functionDeclaration.modifiers) ||
+                                checkTypeParameters(functionDeclaration.typeParameters) ||
+                                checkTypeAnnotation(functionDeclaration.type)) {
+                                return true;
+                            }
+                            break;
+                        case 200 /* VariableStatement */:
+                            var variableStatement = node;
+                            if (checkModifiers(variableStatement.modifiers)) {
+                                return true;
+                            }
+                            break;
+                        case 218 /* VariableDeclaration */:
+                            var variableDeclaration = node;
+                            if (checkTypeAnnotation(variableDeclaration.type)) {
+                                return true;
+                            }
+                            break;
+                        case 174 /* CallExpression */:
+                        case 175 /* NewExpression */:
+                            var expression = node;
+                            if (expression.typeArguments && expression.typeArguments.length > 0) {
+                                var start_2 = expression.typeArguments.pos;
+                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_2, expression.typeArguments.end - start_2, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 142 /* Parameter */:
+                            var parameter = node;
+                            if (parameter.modifiers) {
+                                var start_3 = parameter.modifiers.pos;
+                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_3, parameter.modifiers.end - start_3, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            if (parameter.questionToken) {
+                                diagnostics.push(ts.createDiagnosticForNode(parameter.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
+                                return true;
+                            }
+                            if (parameter.type) {
+                                diagnostics.push(ts.createDiagnosticForNode(parameter.type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 145 /* PropertyDeclaration */:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.property_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 224 /* EnumDeclaration */:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 177 /* TypeAssertionExpression */:
+                            var typeAssertionExpression = node;
+                            diagnostics.push(ts.createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 143 /* Decorator */:
+                            if (!options.experimentalDecorators) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
+                            }
+                            return true;
+                    }
+                    return ts.forEachChild(node, walk);
+                }
+                function checkTypeParameters(typeParameters) {
+                    if (typeParameters) {
+                        var start_4 = typeParameters.pos;
+                        diagnostics.push(ts.createFileDiagnostic(sourceFile, start_4, typeParameters.end - start_4, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
+                        return true;
+                    }
+                    return false;
+                }
+                function checkTypeAnnotation(type) {
+                    if (type) {
+                        diagnostics.push(ts.createDiagnosticForNode(type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
+                        return true;
+                    }
+                    return false;
+                }
+                function checkModifiers(modifiers) {
+                    if (modifiers) {
+                        for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
+                            var modifier = modifiers_1[_i];
+                            switch (modifier.kind) {
+                                case 112 /* PublicKeyword */:
+                                case 110 /* PrivateKeyword */:
+                                case 111 /* ProtectedKeyword */:
+                                case 128 /* ReadonlyKeyword */:
+                                case 122 /* DeclareKeyword */:
+                                    diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
+                                    return true;
+                                // These are all legal modifiers.
+                                case 113 /* StaticKeyword */:
+                                case 82 /* ExportKeyword */:
+                                case 74 /* ConstKeyword */:
+                                case 77 /* DefaultKeyword */:
+                                case 115 /* AbstractKeyword */:
+                            }
+                        }
+                    }
+                    return false;
+                }
+            });
+        }
+        function getDeclarationDiagnosticsWorker(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
+                // Don't actually write any files since we're just getting diagnostics.
+                var writeFile = function () { };
+                return ts.getDeclarationDiagnostics(getEmitHost(writeFile), resolver, sourceFile);
+            });
+        }
+        function getDeclarationDiagnosticsForFile(sourceFile, cancellationToken) {
+            return ts.isDeclarationFile(sourceFile) ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+        }
+        function getOptionsDiagnostics() {
+            var allDiagnostics = [];
+            ts.addRange(allDiagnostics, fileProcessingDiagnostics.getGlobalDiagnostics());
+            ts.addRange(allDiagnostics, programDiagnostics.getGlobalDiagnostics());
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function getGlobalDiagnostics() {
+            var allDiagnostics = [];
+            ts.addRange(allDiagnostics, getDiagnosticsProducingTypeChecker().getGlobalDiagnostics());
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function hasExtension(fileName) {
+            return ts.getBaseFileName(fileName).indexOf(".") >= 0;
+        }
+        function processRootFile(fileName, isDefaultLib) {
+            processSourceFile(ts.normalizePath(fileName), isDefaultLib, /*isReference*/ true);
+        }
+        function fileReferenceIsEqualTo(a, b) {
+            return a.fileName === b.fileName;
+        }
+        function moduleNameIsEqualTo(a, b) {
+            return a.text === b.text;
+        }
+        function getTextOfLiteral(literal) {
+            return literal.text;
+        }
+        function collectExternalModuleReferences(file) {
+            if (file.imports) {
+                return;
+            }
+            var isJavaScriptFile = ts.isSourceFileJavaScript(file);
+            var isExternalModuleFile = ts.isExternalModule(file);
+            var imports;
+            var moduleAugmentations;
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var node = _a[_i];
+                collectModuleReferences(node, /*inAmbientModule*/ false);
+                if (isJavaScriptFile) {
+                    collectRequireCalls(node);
+                }
+            }
+            file.imports = imports || emptyArray;
+            file.moduleAugmentations = moduleAugmentations || emptyArray;
+            return;
+            function collectModuleReferences(node, inAmbientModule) {
+                switch (node.kind) {
+                    case 230 /* ImportDeclaration */:
+                    case 229 /* ImportEqualsDeclaration */:
+                    case 236 /* ExportDeclaration */:
+                        var moduleNameExpr = ts.getExternalModuleName(node);
+                        if (!moduleNameExpr || moduleNameExpr.kind !== 9 /* StringLiteral */) {
+                            break;
+                        }
+                        if (!moduleNameExpr.text) {
+                            break;
+                        }
+                        // TypeScript 1.0 spec (April 2014): 12.1.6
+                        // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference other external modules
+                        // only through top - level external module names. Relative external module names are not permitted.
+                        if (!inAmbientModule || !ts.isExternalModuleNameRelative(moduleNameExpr.text)) {
+                            (imports || (imports = [])).push(moduleNameExpr);
+                        }
+                        break;
+                    case 225 /* ModuleDeclaration */:
+                        if (ts.isAmbientModule(node) && (inAmbientModule || node.flags & 2 /* Ambient */ || ts.isDeclarationFile(file))) {
+                            var moduleName = node.name;
+                            // Ambient module declarations can be interpreted as augmentations for some existing external modules.
+                            // This will happen in two cases:
+                            // - if current file is external module then module augmentation is a ambient module declaration defined in the top level scope
+                            // - if current file is not external module then module augmentation is an ambient module declaration with non-relative module name
+                            //   immediately nested in top level ambient module declaration .
+                            if (isExternalModuleFile || (inAmbientModule && !ts.isExternalModuleNameRelative(moduleName.text))) {
+                                (moduleAugmentations || (moduleAugmentations = [])).push(moduleName);
+                            }
+                            else if (!inAmbientModule) {
+                                // An AmbientExternalModuleDeclaration declares an external module.
+                                // This type of declaration is permitted only in the global module.
+                                // The StringLiteral must specify a top - level external module name.
+                                // Relative external module names are not permitted
+                                // NOTE: body of ambient module is always a module block
+                                for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
+                                    var statement = _a[_i];
+                                    collectModuleReferences(statement, /*inAmbientModule*/ true);
+                                }
+                            }
+                        }
+                }
+            }
+            function collectRequireCalls(node) {
+                if (ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
+                    (imports || (imports = [])).push(node.arguments[0]);
+                }
+                else {
+                    ts.forEachChild(node, collectRequireCalls);
+                }
+            }
+        }
+        /**
+          * 'isReference' indicates whether the file was brought in via a reference directive (rather than an import declaration)
+          */
+        function processSourceFile(fileName, isDefaultLib, isReference, refFile, refPos, refEnd) {
+            var diagnosticArgument;
+            var diagnostic;
+            if (hasExtension(fileName)) {
+                if (!options.allowNonTsExtensions && !ts.forEach(supportedExtensions, function (extension) { return ts.fileExtensionIs(host.getCanonicalFileName(fileName), extension); })) {
+                    diagnostic = ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1;
+                    diagnosticArgument = [fileName, "'" + supportedExtensions.join("', '") + "'"];
+                }
+                else if (!findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd)) {
+                    diagnostic = ts.Diagnostics.File_0_not_found;
+                    diagnosticArgument = [fileName];
+                }
+                else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
+                    diagnostic = ts.Diagnostics.A_file_cannot_have_a_reference_to_itself;
+                    diagnosticArgument = [fileName];
+                }
+            }
+            else {
+                var nonTsFile = options.allowNonTsExtensions && findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd);
+                if (!nonTsFile) {
+                    if (options.allowNonTsExtensions) {
+                        diagnostic = ts.Diagnostics.File_0_not_found;
+                        diagnosticArgument = [fileName];
+                    }
+                    else if (!ts.forEach(supportedExtensions, function (extension) { return findSourceFile(fileName + extension, ts.toPath(fileName + extension, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd); })) {
+                        diagnostic = ts.Diagnostics.File_0_not_found;
+                        fileName += ".ts";
+                        diagnosticArgument = [fileName];
+                    }
+                }
+            }
+            if (diagnostic) {
+                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
+                    fileProcessingDiagnostics.add(ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(diagnosticArgument)));
+                }
+                else {
+                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(diagnosticArgument)));
+                }
+            }
+        }
+        function reportFileNamesDifferOnlyInCasingError(fileName, existingFileName, refFile, refPos, refEnd) {
+            if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
+            }
+            else {
+                fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
+            }
+        }
+        // Get source file from normalized fileName
+        function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) {
+            if (filesByName.contains(path)) {
+                var file_1 = filesByName.get(path);
+                // try to check if we've already seen this file but with a different casing in path
+                // NOTE: this only makes sense for case-insensitive file systems
+                if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
+                    reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
+                }
+                return file_1;
+            }
+            // We haven't looked for this file, do so now and cache result
+            var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
+                if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                    fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
+                }
+                else {
+                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
+                }
+            });
+            filesByName.set(path, file);
+            if (file) {
+                file.path = path;
+                if (host.useCaseSensitiveFileNames()) {
+                    // for case-sensitive file systems check if we've already seen some file with similar filename ignoring case
+                    var existingFile = filesByNameIgnoreCase.get(path);
+                    if (existingFile) {
+                        reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd);
+                    }
+                    else {
+                        filesByNameIgnoreCase.set(path, file);
+                    }
+                }
+                skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
+                var basePath = ts.getDirectoryPath(fileName);
+                if (!options.noResolve) {
+                    processReferencedFiles(file, basePath, isDefaultLib);
+                    processTypeReferenceDirectives(file);
+                }
+                // always process imported modules to record module name resolutions
+                processImportedModules(file, basePath);
+                if (isDefaultLib) {
+                    files.unshift(file);
+                }
+                else {
+                    files.push(file);
+                }
+            }
+            return file;
+        }
+        function processReferencedFiles(file, basePath, isDefaultLib) {
+            ts.forEach(file.referencedFiles, function (ref) {
+                var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
+                processSourceFile(referencedFileName, isDefaultLib, /*isReference*/ true, file, ref.pos, ref.end);
+            });
+        }
+        function processTypeReferenceDirectives(file) {
+            var typeDirectives = ts.map(file.typeReferenceDirectives, function (l) { return l.fileName; });
+            var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeDirectives, file.fileName);
+            for (var i = 0; i < typeDirectives.length; i++) {
+                var ref = file.typeReferenceDirectives[i];
+                var resolvedTypeReferenceDirective = resolutions[i];
+                // store resolved type directive on the file
+                ts.setResolvedTypeReferenceDirective(file, ref.fileName, resolvedTypeReferenceDirective);
+                processTypeReferenceDirective(ref.fileName, resolvedTypeReferenceDirective, file, ref.pos, ref.end);
+            }
+        }
+        function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
+            // If we already found this library as a primary reference - nothing to do
+            var previousResolution = resolvedTypeReferenceDirectives[typeReferenceDirective];
+            if (previousResolution && previousResolution.primary) {
+                return;
+            }
+            var saveResolution = true;
+            if (resolvedTypeReferenceDirective) {
+                if (resolvedTypeReferenceDirective.primary) {
+                    // resolved from the primary path
+                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
+                }
+                else {
+                    // If we already resolved to this file, it must have been a secondary reference. Check file contents
+                    // for sameness and possibly issue an error
+                    if (previousResolution) {
+                        var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
+                        if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
+                            fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
+                        }
+                        // don't overwrite previous resolution result
+                        saveResolution = false;
+                    }
+                    else {
+                        // First resolution of this library
+                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
+                    }
+                }
+            }
+            else {
+                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_name_0, typeReferenceDirective));
+            }
+            if (saveResolution) {
+                resolvedTypeReferenceDirectives[typeReferenceDirective] = resolvedTypeReferenceDirective;
+            }
+        }
+        function createDiagnostic(refFile, refPos, refEnd, message) {
+            var args = [];
+            for (var _i = 4; _i < arguments.length; _i++) {
+                args[_i - 4] = arguments[_i];
+            }
+            if (refFile === undefined || refPos === undefined || refEnd === undefined) {
+                return ts.createCompilerDiagnostic.apply(void 0, [message].concat(args));
+            }
+            else {
+                return ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, message].concat(args));
+            }
+        }
+        function getCanonicalFileName(fileName) {
+            return host.getCanonicalFileName(fileName);
+        }
+        function processImportedModules(file, basePath) {
+            collectExternalModuleReferences(file);
+            if (file.imports.length || file.moduleAugmentations.length) {
+                file.resolvedModules = {};
+                var moduleNames = ts.map(ts.concatenate(file.imports, file.moduleAugmentations), getTextOfLiteral);
+                var resolutions = resolveModuleNamesWorker(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory));
+                for (var i = 0; i < moduleNames.length; i++) {
+                    var resolution = resolutions[i];
+                    ts.setResolvedModule(file, moduleNames[i], resolution);
+                    // add file to program only if:
+                    // - resolution was successful
+                    // - noResolve is falsy
+                    // - module name comes from the list of imports
+                    var shouldAddFile = resolution &&
+                        !options.noResolve &&
+                        i < file.imports.length;
+                    if (shouldAddFile) {
+                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), /*isDefaultLib*/ false, /*isReference*/ false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
+                    }
+                }
+            }
+            else {
+                // no imports - drop cached module resolutions
+                file.resolvedModules = undefined;
+            }
+            return;
+        }
+        function computeCommonSourceDirectory(sourceFiles) {
+            var fileNames = [];
+            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
+                var file = sourceFiles_2[_i];
+                if (!file.isDeclarationFile) {
+                    fileNames.push(file.fileName);
+                }
+            }
+            return computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName);
+        }
+        function checkSourceFilesBelongToPath(sourceFiles, rootDirectory) {
+            var allFilesBelongToPath = true;
+            if (sourceFiles) {
+                var absoluteRootDirectoryPath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(rootDirectory, currentDirectory));
+                for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
+                    var sourceFile = sourceFiles_3[_i];
+                    if (!ts.isDeclarationFile(sourceFile)) {
+                        var absoluteSourceFilePath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
+                        if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
+                            programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
+                            allFilesBelongToPath = false;
+                        }
+                    }
+                }
+            }
+            return allFilesBelongToPath;
+        }
+        function verifyCompilerOptions() {
+            if (options.isolatedModules) {
+                if (options.declaration) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules"));
+                }
+                if (options.noEmitOnError) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules"));
+                }
+                if (options.out) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules"));
+                }
+                if (options.outFile) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules"));
+                }
+            }
+            if (options.inlineSourceMap) {
+                if (options.sourceMap) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap"));
+                }
+                if (options.mapRoot) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap"));
+                }
+            }
+            if (options.paths && options.baseUrl === undefined) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option));
+            }
+            if (options.paths) {
+                for (var key in options.paths) {
+                    if (!ts.hasProperty(options.paths, key)) {
+                        continue;
+                    }
+                    if (!hasZeroOrOneAsteriskCharacter(key)) {
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key));
+                    }
+                    if (ts.isArray(options.paths[key])) {
+                        for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
+                            var subst = _a[_i];
+                            var typeOfSubst = typeof subst;
+                            if (typeOfSubst === "string") {
+                                if (!hasZeroOrOneAsteriskCharacter(subst)) {
+                                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key));
+                                }
+                            }
+                            else {
+                                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst));
+                            }
+                        }
+                    }
+                    else {
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
+                    }
+                }
+            }
+            if (!options.sourceMap && !options.inlineSourceMap) {
+                if (options.inlineSources) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "inlineSources"));
+                }
+                if (options.sourceRoot) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "sourceRoot"));
+                }
+            }
+            if (options.out && options.outFile) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
+            }
+            if (options.mapRoot && !options.sourceMap) {
+                // Error to specify --mapRoot without --sourcemap
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
+            }
+            if (options.declarationDir) {
+                if (!options.declaration) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration"));
+                }
+                if (options.out || options.outFile) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile"));
+                }
+            }
+            if (options.lib && options.noLib) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib"));
+            }
+            var languageVersion = options.target || 0 /* ES3 */;
+            var outFile = options.outFile || options.out;
+            var firstExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) ? f : undefined; });
+            if (options.isolatedModules) {
+                if (options.module === ts.ModuleKind.None && languageVersion < 2 /* ES6 */) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
+                }
+                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
+                if (firstNonExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
+                }
+            }
+            else if (firstExternalModuleSourceFile && languageVersion < 2 /* ES6 */ && options.module === ts.ModuleKind.None) {
+                // We cannot use createDiagnosticFromNode because nodes do not have parents yet
+                var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
+            }
+            // Cannot specify module gen target of es6 when below es6
+            if (options.module === ts.ModuleKind.ES6 && languageVersion < 2 /* ES6 */) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
+            }
+            // Cannot specify module gen that isn't amd or system with --out
+            if (outFile) {
+                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+                }
+                else if (options.module === undefined && firstExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
+                }
+            }
+            // there has to be common source directory if user specified --outdir || --sourceRoot
+            // if user specified --mapRoot, there needs to be common source directory if there would be multiple files being emitted
+            if (options.outDir ||
+                options.sourceRoot ||
+                options.mapRoot) {
+                // Precalculate and cache the common source directory
+                var dir = getCommonSourceDirectory();
+                // If we failed to find a good common directory, but outDir is specified and at least one of our files is on a windows drive/URL/other resource, add a failure
+                if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files));
+                }
+            }
+            if (!options.noEmit && options.allowJs && options.declaration) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration"));
+            }
+            if (options.emitDecoratorMetadata &&
+                !options.experimentalDecorators) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators"));
+            }
+            if (options.reactNamespace && !ts.isIdentifier(options.reactNamespace, languageVersion)) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace));
+            }
+            // If the emit is enabled make sure that every output file is unique and not overwriting any of the input files
+            if (!options.noEmit && !options.suppressOutputPathCheck) {
+                var emitHost = getEmitHost();
+                var emitFilesSeen_1 = ts.createFileMap(!host.useCaseSensitiveFileNames() ? function (key) { return key.toLocaleLowerCase(); } : undefined);
+                ts.forEachExpectedEmitFile(emitHost, function (emitFileNames, sourceFiles, isBundledEmit) {
+                    verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen_1);
+                    verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
+                });
+            }
+            // Verify that all the emit files are unique and don't overwrite input files
+            function verifyEmitFilePath(emitFileName, emitFilesSeen) {
+                if (emitFileName) {
+                    var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName);
+                    // Report error if the output overwrites input file
+                    if (filesByName.contains(emitFilePath)) {
+                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file);
+                    }
+                    // Report error if multiple files write into same file
+                    if (emitFilesSeen.contains(emitFilePath)) {
+                        // Already seen the same emit file - report error
+                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files);
+                    }
+                    else {
+                        emitFilesSeen.set(emitFilePath, true);
+                    }
+                }
+            }
+        }
+        function createEmitBlockingDiagnostics(emitFileName, emitFilePath, message) {
+            hasEmitBlockingDiagnostics.set(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName), true);
+            programDiagnostics.add(ts.createCompilerDiagnostic(message, emitFileName));
+        }
+    }
+    ts.createProgram = createProgram;
+})(ts || (ts = {}));
+/// <reference path="sys.ts"/>
+/// <reference path="types.ts"/>
+/// <reference path="core.ts"/>
+/// <reference path="diagnosticInformationMap.generated.ts"/>
+/// <reference path="scanner.ts"/>
+var ts;
+(function (ts) {
+    /* @internal */
+    ts.optionDeclarations = [
+        {
+            name: "charset",
+            type: "string"
+        },
+        {
+            name: "declaration",
+            shortName: "d",
+            type: "boolean",
+            description: ts.Diagnostics.Generates_corresponding_d_ts_file
+        },
+        {
+            name: "declarationDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "diagnostics",
+            type: "boolean"
+        },
+        {
+            name: "emitBOM",
+            type: "boolean"
+        },
+        {
+            name: "help",
+            shortName: "h",
+            type: "boolean",
+            description: ts.Diagnostics.Print_this_message
+        },
+        {
+            name: "help",
+            shortName: "?",
+            type: "boolean"
+        },
+        {
+            name: "init",
+            type: "boolean",
+            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file
+        },
+        {
+            name: "inlineSourceMap",
+            type: "boolean"
+        },
+        {
+            name: "inlineSources",
+            type: "boolean"
+        },
+        {
+            name: "jsx",
+            type: {
+                "preserve": 1 /* Preserve */,
+                "react": 2 /* React */
+            },
+            paramType: ts.Diagnostics.KIND,
+            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_or_react
+        },
+        {
+            name: "reactNamespace",
+            type: "string",
+            description: ts.Diagnostics.Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit
+        },
+        {
+            name: "listFiles",
+            type: "boolean"
+        },
+        {
+            name: "locale",
+            type: "string"
+        },
+        {
+            name: "mapRoot",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
+            paramType: ts.Diagnostics.LOCATION
+        },
+        {
+            name: "module",
+            shortName: "m",
+            type: {
+                "none": ts.ModuleKind.None,
+                "commonjs": ts.ModuleKind.CommonJS,
+                "amd": ts.ModuleKind.AMD,
+                "system": ts.ModuleKind.System,
+                "umd": ts.ModuleKind.UMD,
+                "es6": ts.ModuleKind.ES6,
+                "es2015": ts.ModuleKind.ES2015
+            },
+            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
+            paramType: ts.Diagnostics.KIND
+        },
+        {
+            name: "newLine",
+            type: {
+                "crlf": 0 /* CarriageReturnLineFeed */,
+                "lf": 1 /* LineFeed */
+            },
+            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
+            paramType: ts.Diagnostics.NEWLINE
+        },
+        {
+            name: "noEmit",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_outputs
+        },
+        {
+            name: "noEmitHelpers",
+            type: "boolean"
+        },
+        {
+            name: "noEmitOnError",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported
+        },
+        {
+            name: "noImplicitAny",
+            type: "boolean",
+            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type
+        },
+        {
+            name: "noImplicitThis",
+            type: "boolean",
+            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type
+        },
+        {
+            name: "noLib",
+            type: "boolean"
+        },
+        {
+            name: "noResolve",
+            type: "boolean"
+        },
+        {
+            name: "skipDefaultLibCheck",
+            type: "boolean"
+        },
+        {
+            name: "skipLibCheck",
+            type: "boolean",
+            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
+        },
+        {
+            name: "out",
+            type: "string",
+            isFilePath: false,
+            // for correct behaviour, please use outFile
+            paramType: ts.Diagnostics.FILE
+        },
+        {
+            name: "outFile",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
+            paramType: ts.Diagnostics.FILE
+        },
+        {
+            name: "outDir",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "preserveConstEnums",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
+        },
+        {
+            name: "pretty",
+            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental,
+            type: "boolean"
+        },
+        {
+            name: "project",
+            shortName: "p",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Compile_the_project_in_the_given_directory,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "removeComments",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_comments_to_output
+        },
+        {
+            name: "rootDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.LOCATION,
+            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir
+        },
+        {
+            name: "isolatedModules",
+            type: "boolean"
+        },
+        {
+            name: "sourceMap",
+            type: "boolean",
+            description: ts.Diagnostics.Generates_corresponding_map_file
+        },
+        {
+            name: "sourceRoot",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
+            paramType: ts.Diagnostics.LOCATION
+        },
+        {
+            name: "suppressExcessPropertyErrors",
+            type: "boolean",
+            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
+            experimental: true
+        },
+        {
+            name: "suppressImplicitAnyIndexErrors",
+            type: "boolean",
+            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures
+        },
+        {
+            name: "stripInternal",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
+            experimental: true
+        },
+        {
+            name: "target",
+            shortName: "t",
+            type: {
+                "es3": 0 /* ES3 */,
+                "es5": 1 /* ES5 */,
+                "es6": 2 /* ES6 */,
+                "es2015": 2 /* ES2015 */
+            },
+            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
+            paramType: ts.Diagnostics.VERSION
+        },
+        {
+            name: "version",
+            shortName: "v",
+            type: "boolean",
+            description: ts.Diagnostics.Print_the_compiler_s_version
+        },
+        {
+            name: "watch",
+            shortName: "w",
+            type: "boolean",
+            description: ts.Diagnostics.Watch_input_files
+        },
+        {
+            name: "experimentalDecorators",
+            type: "boolean",
+            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
+        },
+        {
+            name: "emitDecoratorMetadata",
+            type: "boolean",
+            experimental: true,
+            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
+        },
+        {
+            name: "moduleResolution",
+            type: {
+                "node": ts.ModuleResolutionKind.NodeJs,
+                "classic": ts.ModuleResolutionKind.Classic
+            },
+            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6
+        },
+        {
+            name: "allowUnusedLabels",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
+        },
+        {
+            name: "noImplicitReturns",
+            type: "boolean",
+            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
+        },
+        {
+            name: "noFallthroughCasesInSwitch",
+            type: "boolean",
+            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
+        },
+        {
+            name: "allowUnreachableCode",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
+        },
+        {
+            name: "forceConsistentCasingInFileNames",
+            type: "boolean",
+            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
+        },
+        {
+            name: "baseUrl",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
+        },
+        {
+            // this option can only be specified in tsconfig.json
+            // use type = object to copy the value as-is
+            name: "paths",
+            type: "object",
+            isTSConfigOnly: true
+        },
+        {
+            // this option can only be specified in tsconfig.json
+            // use type = object to copy the value as-is
+            name: "rootDirs",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "rootDirs",
+                type: "string",
+                isFilePath: true
+            }
+        },
+        {
+            name: "typesSearchPaths",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "typesSearchPaths",
+                type: "string",
+                isFilePath: true
+            }
+        },
+        {
+            name: "typesRoot",
+            type: "string"
+        },
+        {
+            name: "types",
+            type: "list",
+            element: {
+                name: "types",
+                type: "string"
+            },
+            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
+        },
+        {
+            name: "traceResolution",
+            type: "boolean",
+            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
+        },
+        {
+            name: "allowJs",
+            type: "boolean",
+            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
+        },
+        {
+            name: "allowSyntheticDefaultImports",
+            type: "boolean",
+            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
+        },
+        {
+            name: "noImplicitUseStrict",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
+        },
+        {
+            name: "listEmittedFiles",
+            type: "boolean"
+        },
+        {
+            name: "lib",
+            type: "list",
+            element: {
+                name: "lib",
+                type: {
+                    // JavaScript only
+                    "es5": "lib.es5.d.ts",
+                    "es6": "lib.es2015.d.ts",
+                    "es2015": "lib.es2015.d.ts",
+                    "es7": "lib.es2016.d.ts",
+                    "es2016": "lib.es2016.d.ts",
+                    "es2017": "lib.es2017.d.ts",
+                    // Host only
+                    "dom": "lib.dom.d.ts",
+                    "webworker": "lib.webworker.d.ts",
+                    "scripthost": "lib.scripthost.d.ts",
+                    // ES2015 Or ESNext By-feature options
+                    "es2015.core": "lib.es2015.core.d.ts",
+                    "es2015.collection": "lib.es2015.collection.d.ts",
+                    "es2015.generator": "lib.es2015.generator.d.ts",
+                    "es2015.iterable": "lib.es2015.iterable.d.ts",
+                    "es2015.promise": "lib.es2015.promise.d.ts",
+                    "es2015.proxy": "lib.es2015.proxy.d.ts",
+                    "es2015.reflect": "lib.es2015.reflect.d.ts",
+                    "es2015.symbol": "lib.es2015.symbol.d.ts",
+                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
+                    "es2016.array.include": "lib.es2016.array.include.d.ts",
+                    "es2017.object": "lib.es2017.object.d.ts",
+                    "es2017.sharedmemory": "lib.es2017.sharedmemory.d.ts"
+                }
+            },
+            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
+        },
+        {
+            name: "strictNullChecks",
+            type: "boolean",
+            description: ts.Diagnostics.Enable_strict_null_checks
+        }
+    ];
+    /* @internal */
+    ts.typingOptionDeclarations = [
+        {
+            name: "enableAutoDiscovery",
+            type: "boolean"
+        },
+        {
+            name: "include",
+            type: "list",
+            element: {
+                name: "include",
+                type: "string"
+            }
+        },
+        {
+            name: "exclude",
+            type: "list",
+            element: {
+                name: "exclude",
+                type: "string"
+            }
+        }
+    ];
+    var optionNameMapCache;
+    /* @internal */
+    function getOptionNameMap() {
+        if (optionNameMapCache) {
+            return optionNameMapCache;
+        }
+        var optionNameMap = {};
+        var shortOptionNames = {};
+        ts.forEach(ts.optionDeclarations, function (option) {
+            optionNameMap[option.name.toLowerCase()] = option;
+            if (option.shortName) {
+                shortOptionNames[option.shortName] = option.name;
+            }
+        });
+        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
+        return optionNameMapCache;
+    }
+    ts.getOptionNameMap = getOptionNameMap;
+    /* @internal */
+    function createCompilerDiagnosticForInvalidCustomType(opt) {
+        var namesOfType = [];
+        ts.forEachKey(opt.type, function (key) {
+            namesOfType.push(" '" + key + "'");
+        });
+        return ts.createCompilerDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
+    }
+    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
+    /* @internal */
+    function parseCustomTypeOption(opt, value, errors) {
+        var key = trimString((value || "")).toLowerCase();
+        var map = opt.type;
+        if (ts.hasProperty(map, key)) {
+            return map[key];
+        }
+        else {
+            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
+        }
+    }
+    ts.parseCustomTypeOption = parseCustomTypeOption;
+    /* @internal */
+    function parseListTypeOption(opt, value, errors) {
+        var values = trimString((value || "")).split(",");
+        switch (opt.element.type) {
+            case "number":
+                return ts.map(values, parseInt);
+            case "string":
+                return ts.map(values, function (v) { return v || ""; });
+            default:
+                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
+        }
+    }
+    ts.parseListTypeOption = parseListTypeOption;
+    /* @internal */
+    function parseCommandLine(commandLine, readFile) {
+        var options = {};
+        var fileNames = [];
+        var errors = [];
+        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
+        parseStrings(commandLine);
+        return {
+            options: options,
+            fileNames: fileNames,
+            errors: errors
+        };
+        function parseStrings(args) {
+            var i = 0;
+            while (i < args.length) {
+                var s = args[i];
+                i++;
+                if (s.charCodeAt(0) === 64 /* at */) {
+                    parseResponseFile(s.slice(1));
+                }
+                else if (s.charCodeAt(0) === 45 /* minus */) {
+                    s = s.slice(s.charCodeAt(1) === 45 /* minus */ ? 2 : 1).toLowerCase();
+                    // Try to translate short option names to their full equivalents.
+                    if (ts.hasProperty(shortOptionNames, s)) {
+                        s = shortOptionNames[s];
+                    }
+                    if (ts.hasProperty(optionNameMap, s)) {
+                        var opt = optionNameMap[s];
+                        if (opt.isTSConfigOnly) {
+                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
+                        }
+                        else {
+                            // Check to see if no argument was provided (e.g. "--locale" is the last command-line argument).
+                            if (!args[i] && opt.type !== "boolean") {
+                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
+                            }
+                            switch (opt.type) {
+                                case "number":
+                                    options[opt.name] = parseInt(args[i]);
+                                    i++;
+                                    break;
+                                case "boolean":
+                                    options[opt.name] = true;
+                                    break;
+                                case "string":
+                                    options[opt.name] = args[i] || "";
+                                    i++;
+                                    break;
+                                case "list":
+                                    options[opt.name] = parseListTypeOption(opt, args[i], errors);
+                                    i++;
+                                    break;
+                                // If not a primitive, the possible types are specified in what is effectively a map of options.
+                                default:
+                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
+                                    i++;
+                                    break;
+                            }
+                        }
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
+                    }
+                }
+                else {
+                    fileNames.push(s);
+                }
+            }
+        }
+        function parseResponseFile(fileName) {
+            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
+            if (!text) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
+                return;
+            }
+            var args = [];
+            var pos = 0;
+            while (true) {
+                while (pos < text.length && text.charCodeAt(pos) <= 32 /* space */)
+                    pos++;
+                if (pos >= text.length)
+                    break;
+                var start = pos;
+                if (text.charCodeAt(start) === 34 /* doubleQuote */) {
+                    pos++;
+                    while (pos < text.length && text.charCodeAt(pos) !== 34 /* doubleQuote */)
+                        pos++;
+                    if (pos < text.length) {
+                        args.push(text.substring(start + 1, pos));
+                        pos++;
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
+                    }
+                }
+                else {
+                    while (text.charCodeAt(pos) > 32 /* space */)
+                        pos++;
+                    args.push(text.substring(start, pos));
+                }
+            }
+            parseStrings(args);
+        }
+    }
+    ts.parseCommandLine = parseCommandLine;
+    /**
+      * Read tsconfig.json file
+      * @param fileName The path to the config file
+      */
+    function readConfigFile(fileName, readFile) {
+        var text = "";
+        try {
+            text = readFile(fileName);
+        }
+        catch (e) {
+            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
+        }
+        return parseConfigFileTextToJson(fileName, text);
+    }
+    ts.readConfigFile = readConfigFile;
+    /**
+      * Parse the text of the tsconfig.json file
+      * @param fileName The path to the config file
+      * @param jsonText The text of the config file
+      */
+    function parseConfigFileTextToJson(fileName, jsonText) {
+        try {
+            var jsonTextWithoutComments = removeComments(jsonText);
+            return { config: /\S/.test(jsonTextWithoutComments) ? JSON.parse(jsonTextWithoutComments) : {} };
+        }
+        catch (e) {
+            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) };
+        }
+    }
+    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
+    /**
+     * Remove the comments from a json like text.
+     * Comments can be single line comments (starting with # or //) or multiline comments using / * * /
+     *
+     * This method replace comment content by whitespace rather than completely remove them to keep positions in json parsing error reporting accurate.
+     */
+    function removeComments(jsonText) {
+        var output = "";
+        var scanner = ts.createScanner(1 /* ES5 */, /* skipTrivia */ false, 0 /* Standard */, jsonText);
+        var token;
+        while ((token = scanner.scan()) !== 1 /* EndOfFileToken */) {
+            switch (token) {
+                case 2 /* SingleLineCommentTrivia */:
+                case 3 /* MultiLineCommentTrivia */:
+                    // replace comments with whitespace to preserve original character positions
+                    output += scanner.getTokenText().replace(/\S/g, " ");
+                    break;
+                default:
+                    output += scanner.getTokenText();
+                    break;
+            }
+        }
+        return output;
+    }
+    // Skip over any minified JavaScript files (ending in ".min.js")
+    // Skip over dotted files and folders as well
+    var IgnoreFileNamePattern = /(\.min\.js$)|([\\/]\.[\w.])/;
+    /**
+      * Parse the contents of a config file (tsconfig.json).
+      * @param json The contents of the config file to parse
+      * @param host Instance of ParseConfigHost used to enumerate files in folder.
+      * @param basePath A root directory to resolve relative path entries in the config
+      *    file to. e.g. outDir
+      */
+    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName) {
+        if (existingOptions === void 0) { existingOptions = {}; }
+        var errors = [];
+        var compilerOptions = convertCompilerOptionsFromJsonWorker(json["compilerOptions"], basePath, errors, configFileName);
+        var options = ts.extend(existingOptions, compilerOptions);
+        var typingOptions = convertTypingOptionsFromJsonWorker(json["typingOptions"], basePath, errors, configFileName);
+        options.configFilePath = configFileName;
+        var fileNames = getFileNames(errors);
+        return {
+            options: options,
+            fileNames: fileNames,
+            typingOptions: typingOptions,
+            raw: json,
+            errors: errors
+        };
+        function getFileNames(errors) {
+            var fileNames = [];
+            if (ts.hasProperty(json, "files")) {
+                if (ts.isArray(json["files"])) {
+                    fileNames = ts.map(json["files"], function (s) { return ts.combinePaths(basePath, s); });
+                }
+                else {
+                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
+                }
+            }
+            else {
+                var filesSeen = {};
+                var exclude = [];
+                if (ts.isArray(json["exclude"])) {
+                    exclude = json["exclude"];
+                }
+                else {
+                    // by default exclude node_modules, and any specificied output directory
+                    exclude = ["node_modules", "bower_components", "jspm_packages"];
+                }
+                var outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
+                if (outDir) {
+                    exclude.push(outDir);
+                }
+                exclude = ts.map(exclude, function (e) { return ts.getNormalizedAbsolutePath(e, basePath); });
+                var supportedExtensions = ts.getSupportedExtensions(options);
+                ts.Debug.assert(ts.indexOf(supportedExtensions, ".ts") < ts.indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
+                // Get files of supported extensions in their order of resolution
+                for (var _i = 0, supportedExtensions_1 = supportedExtensions; _i < supportedExtensions_1.length; _i++) {
+                    var extension = supportedExtensions_1[_i];
+                    var filesInDirWithExtension = host.readDirectory(basePath, extension, exclude);
+                    for (var _a = 0, filesInDirWithExtension_1 = filesInDirWithExtension; _a < filesInDirWithExtension_1.length; _a++) {
+                        var fileName = filesInDirWithExtension_1[_a];
+                        // .ts extension would read the .d.ts extension files too but since .d.ts is lower priority extension,
+                        // lets pick them when its turn comes up
+                        if (extension === ".ts" && ts.fileExtensionIs(fileName, ".d.ts")) {
+                            continue;
+                        }
+                        if (IgnoreFileNamePattern.test(fileName)) {
+                            continue;
+                        }
+                        // If this is one of the output extension (which would be .d.ts and .js if we are allowing compilation of js files)
+                        // do not include this file if we included .ts or .tsx file with same base name as it could be output of the earlier compilation
+                        if (extension === ".d.ts" || (options.allowJs && ts.contains(ts.supportedJavascriptExtensions, extension))) {
+                            var baseName = fileName.substr(0, fileName.length - extension.length);
+                            if (ts.hasProperty(filesSeen, baseName + ".ts") || ts.hasProperty(filesSeen, baseName + ".tsx")) {
+                                continue;
+                            }
+                        }
+                        filesSeen[fileName] = true;
+                        fileNames.push(fileName);
+                    }
+                }
+            }
+            if (ts.hasProperty(json, "excludes") && !ts.hasProperty(json, "exclude")) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
+            }
+            return fileNames;
+        }
+    }
+    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
+    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
+    function convertTypingOptionsFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertTypingOptionsFromJson = convertTypingOptionsFromJson;
+    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = ts.getBaseFileName(configFileName) === "jsconfig.json" ? { allowJs: true } : {};
+        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
+        return options;
+    }
+    function convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
+            ? { enableAutoDiscovery: true, include: [], exclude: [] }
+            : { enableAutoDiscovery: false, include: [], exclude: [] };
+        convertOptionsFromJson(ts.typingOptionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_typing_option_0, errors);
+        return options;
+    }
+    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
+        if (!jsonOptions) {
+            return;
+        }
+        var optionNameMap = ts.arrayToMap(optionDeclarations, function (opt) { return opt.name; });
+        for (var id in jsonOptions) {
+            if (ts.hasProperty(optionNameMap, id)) {
+                var opt = optionNameMap[id];
+                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
+            }
+            else {
+                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
+            }
+        }
+    }
+    function convertJsonOption(opt, value, basePath, errors) {
+        var optType = opt.type;
+        var expectedType = typeof optType === "string" ? optType : "string";
+        if (optType === "list" && ts.isArray(value)) {
+            return convertJsonOptionOfListType(opt, value, basePath, errors);
+        }
+        else if (typeof value === expectedType) {
+            if (typeof optType !== "string") {
+                return convertJsonOptionOfCustomType(opt, value, errors);
+            }
+            else {
+                if (opt.isFilePath) {
+                    value = ts.normalizePath(ts.combinePaths(basePath, value));
+                    if (value === "") {
+                        value = ".";
+                    }
+                }
+            }
+            return value;
+        }
+        else {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, expectedType));
+        }
+    }
+    function convertJsonOptionOfCustomType(opt, value, errors) {
+        var key = value.toLowerCase();
+        if (ts.hasProperty(opt.type, key)) {
+            return opt.type[key];
+        }
+        else {
+            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
+        }
+    }
+    function convertJsonOptionOfListType(option, values, basePath, errors) {
+        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
+    }
+    function trimString(s) {
+        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
+    }
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var OutliningElementsCollector;
+    (function (OutliningElementsCollector) {
+        function collectElements(sourceFile) {
+            var elements = [];
+            var collapseText = "...";
+            function addOutliningSpan(hintSpanNode, startElement, endElement, autoCollapse) {
+                if (hintSpanNode && startElement && endElement) {
+                    var span = {
+                        textSpan: ts.createTextSpanFromBounds(startElement.pos, endElement.end),
+                        hintSpan: ts.createTextSpanFromBounds(hintSpanNode.getStart(), hintSpanNode.end),
+                        bannerText: collapseText,
+                        autoCollapse: autoCollapse
+                    };
+                    elements.push(span);
+                }
+            }
+            function addOutliningSpanComments(commentSpan, autoCollapse) {
+                if (commentSpan) {
+                    var span = {
+                        textSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
+                        hintSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
+                        bannerText: collapseText,
+                        autoCollapse: autoCollapse
+                    };
+                    elements.push(span);
+                }
+            }
+            function addOutliningForLeadingCommentsForNode(n) {
+                var comments = ts.getLeadingCommentRangesOfNode(n, sourceFile);
+                if (comments) {
+                    var firstSingleLineCommentStart = -1;
+                    var lastSingleLineCommentEnd = -1;
+                    var isFirstSingleLineComment = true;
+                    var singleLineCommentCount = 0;
+                    for (var _i = 0, comments_2 = comments; _i < comments_2.length; _i++) {
+                        var currentComment = comments_2[_i];
+                        // For single line comments, combine consecutive ones (2 or more) into
+                        // a single span from the start of the first till the end of the last
+                        if (currentComment.kind === 2 /* SingleLineCommentTrivia */) {
+                            if (isFirstSingleLineComment) {
+                                firstSingleLineCommentStart = currentComment.pos;
+                            }
+                            isFirstSingleLineComment = false;
+                            lastSingleLineCommentEnd = currentComment.end;
+                            singleLineCommentCount++;
+                        }
+                        else if (currentComment.kind === 3 /* MultiLineCommentTrivia */) {
+                            combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
+                            addOutliningSpanComments(currentComment, /*autoCollapse*/ false);
+                            singleLineCommentCount = 0;
+                            lastSingleLineCommentEnd = -1;
+                            isFirstSingleLineComment = true;
+                        }
+                    }
+                    combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
+                }
+            }
+            function combineAndAddMultipleSingleLineComments(count, start, end) {
+                // Only outline spans of two or more consecutive single line comments
+                if (count > 1) {
+                    var multipleSingleLineComments = {
+                        pos: start,
+                        end: end,
+                        kind: 2 /* SingleLineCommentTrivia */
+                    };
+                    addOutliningSpanComments(multipleSingleLineComments, /*autoCollapse*/ false);
+                }
+            }
+            function autoCollapse(node) {
+                return ts.isFunctionBlock(node) && node.parent.kind !== 180 /* ArrowFunction */;
+            }
+            var depth = 0;
+            var maxDepth = 20;
+            function walk(n) {
+                if (depth > maxDepth) {
+                    return;
+                }
+                if (ts.isDeclaration(n)) {
+                    addOutliningForLeadingCommentsForNode(n);
+                }
+                switch (n.kind) {
+                    case 199 /* Block */:
+                        if (!ts.isFunctionBlock(n)) {
+                            var parent_14 = n.parent;
+                            var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
+                            var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
+                            // Check if the block is standalone, or 'attached' to some parent statement.
+                            // If the latter, we want to collapse the block, but consider its hint span
+                            // to be the entire span of the parent.
+                            if (parent_14.kind === 204 /* DoStatement */ ||
+                                parent_14.kind === 207 /* ForInStatement */ ||
+                                parent_14.kind === 208 /* ForOfStatement */ ||
+                                parent_14.kind === 206 /* ForStatement */ ||
+                                parent_14.kind === 203 /* IfStatement */ ||
+                                parent_14.kind === 205 /* WhileStatement */ ||
+                                parent_14.kind === 212 /* WithStatement */ ||
+                                parent_14.kind === 252 /* CatchClause */) {
+                                addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
+                                break;
+                            }
+                            if (parent_14.kind === 216 /* TryStatement */) {
+                                // Could be the try-block, or the finally-block.
+                                var tryStatement = parent_14;
+                                if (tryStatement.tryBlock === n) {
+                                    addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
+                                    break;
+                                }
+                                else if (tryStatement.finallyBlock === n) {
+                                    var finallyKeyword = ts.findChildOfKind(tryStatement, 85 /* FinallyKeyword */, sourceFile);
+                                    if (finallyKeyword) {
+                                        addOutliningSpan(finallyKeyword, openBrace, closeBrace, autoCollapse(n));
+                                        break;
+                                    }
+                                }
+                            }
+                            // Block was a standalone block.  In this case we want to only collapse
+                            // the span of the block, independent of any parent span.
+                            var span = ts.createTextSpanFromBounds(n.getStart(), n.end);
+                            elements.push({
+                                textSpan: span,
+                                hintSpan: span,
+                                bannerText: collapseText,
+                                autoCollapse: autoCollapse(n)
+                            });
+                            break;
+                        }
+                    // Fallthrough.
+                    case 226 /* ModuleBlock */: {
+                        var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
+                        var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
+                        addOutliningSpan(n.parent, openBrace, closeBrace, autoCollapse(n));
+                        break;
+                    }
+                    case 221 /* ClassDeclaration */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 171 /* ObjectLiteralExpression */:
+                    case 227 /* CaseBlock */: {
+                        var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
+                        var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
+                        addOutliningSpan(n, openBrace, closeBrace, autoCollapse(n));
+                        break;
+                    }
+                    case 170 /* ArrayLiteralExpression */:
+                        var openBracket = ts.findChildOfKind(n, 19 /* OpenBracketToken */, sourceFile);
+                        var closeBracket = ts.findChildOfKind(n, 20 /* CloseBracketToken */, sourceFile);
+                        addOutliningSpan(n, openBracket, closeBracket, autoCollapse(n));
+                        break;
+                }
+                depth++;
+                ts.forEachChild(n, walk);
+                depth--;
+            }
+            walk(sourceFile);
+            return elements;
+        }
+        OutliningElementsCollector.collectElements = collectElements;
+    })(OutliningElementsCollector = ts.OutliningElementsCollector || (ts.OutliningElementsCollector = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var NavigateTo;
+    (function (NavigateTo) {
+        function getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount) {
+            var patternMatcher = ts.createPatternMatcher(searchValue);
+            var rawItems = [];
+            // This means "compare in a case insensitive manner."
+            var baseSensitivity = { sensitivity: "base" };
+            // Search the declarations in all files and output matched NavigateToItem into array of NavigateToItem[]
+            ts.forEach(program.getSourceFiles(), function (sourceFile) {
+                cancellationToken.throwIfCancellationRequested();
+                var nameToDeclarations = sourceFile.getNamedDeclarations();
+                for (var name_35 in nameToDeclarations) {
+                    var declarations = ts.getProperty(nameToDeclarations, name_35);
+                    if (declarations) {
+                        // First do a quick check to see if the name of the declaration matches the
+                        // last portion of the (possibly) dotted name they're searching for.
+                        var matches = patternMatcher.getMatchesForLastSegmentOfPattern(name_35);
+                        if (!matches) {
+                            continue;
+                        }
+                        for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
+                            var declaration = declarations_7[_i];
+                            // It was a match!  If the pattern has dots in it, then also see if the
+                            // declaration container matches as well.
+                            if (patternMatcher.patternContainsDots) {
+                                var containers = getContainers(declaration);
+                                if (!containers) {
+                                    return undefined;
+                                }
+                                matches = patternMatcher.getMatches(containers, name_35);
+                                if (!matches) {
+                                    continue;
+                                }
+                            }
+                            var fileName = sourceFile.fileName;
+                            var matchKind = bestMatchKind(matches);
+                            rawItems.push({ name: name_35, fileName: fileName, matchKind: matchKind, isCaseSensitive: allMatchesAreCaseSensitive(matches), declaration: declaration });
+                        }
+                    }
+                }
+            });
+            // Remove imports when the imported declaration is already in the list and has the same name.
+            rawItems = ts.filter(rawItems, function (item) {
+                var decl = item.declaration;
+                if (decl.kind === 231 /* ImportClause */ || decl.kind === 234 /* ImportSpecifier */ || decl.kind === 229 /* ImportEqualsDeclaration */) {
+                    var importer = checker.getSymbolAtLocation(decl.name);
+                    var imported = checker.getAliasedSymbol(importer);
+                    return importer.name !== imported.name;
+                }
+                else {
+                    return true;
+                }
+            });
+            rawItems.sort(compareNavigateToItems);
+            if (maxResultCount !== undefined) {
+                rawItems = rawItems.slice(0, maxResultCount);
+            }
+            var items = ts.map(rawItems, createNavigateToItem);
+            return items;
+            function allMatchesAreCaseSensitive(matches) {
+                ts.Debug.assert(matches.length > 0);
+                // This is a case sensitive match, only if all the submatches were case sensitive.
+                for (var _i = 0, matches_1 = matches; _i < matches_1.length; _i++) {
+                    var match = matches_1[_i];
+                    if (!match.isCaseSensitive) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            function getTextOfIdentifierOrLiteral(node) {
+                if (node) {
+                    if (node.kind === 69 /* Identifier */ ||
+                        node.kind === 9 /* StringLiteral */ ||
+                        node.kind === 8 /* NumericLiteral */) {
+                        return node.text;
+                    }
+                }
+                return undefined;
+            }
+            function tryAddSingleDeclarationName(declaration, containers) {
+                if (declaration && declaration.name) {
+                    var text = getTextOfIdentifierOrLiteral(declaration.name);
+                    if (text !== undefined) {
+                        containers.unshift(text);
+                    }
+                    else if (declaration.name.kind === 140 /* ComputedPropertyName */) {
+                        return tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ true);
+                    }
+                    else {
+                        // Don't know how to add this.
+                        return false;
+                    }
+                }
+                return true;
+            }
+            // Only added the names of computed properties if they're simple dotted expressions, like:
+            //
+            //      [X.Y.Z]() { }
+            function tryAddComputedPropertyName(expression, containers, includeLastPortion) {
+                var text = getTextOfIdentifierOrLiteral(expression);
+                if (text !== undefined) {
+                    if (includeLastPortion) {
+                        containers.unshift(text);
+                    }
+                    return true;
+                }
+                if (expression.kind === 172 /* PropertyAccessExpression */) {
+                    var propertyAccess = expression;
+                    if (includeLastPortion) {
+                        containers.unshift(propertyAccess.name.text);
+                    }
+                    return tryAddComputedPropertyName(propertyAccess.expression, containers, /*includeLastPortion*/ true);
+                }
+                return false;
+            }
+            function getContainers(declaration) {
+                var containers = [];
+                // First, if we started with a computed property name, then add all but the last
+                // portion into the container array.
+                if (declaration.name.kind === 140 /* ComputedPropertyName */) {
+                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ false)) {
+                        return undefined;
+                    }
+                }
+                // Now, walk up our containers, adding all their names to the container array.
+                declaration = ts.getContainerNode(declaration);
+                while (declaration) {
+                    if (!tryAddSingleDeclarationName(declaration, containers)) {
+                        return undefined;
+                    }
+                    declaration = ts.getContainerNode(declaration);
+                }
+                return containers;
+            }
+            function bestMatchKind(matches) {
+                ts.Debug.assert(matches.length > 0);
+                var bestMatchKind = ts.PatternMatchKind.camelCase;
+                for (var _i = 0, matches_2 = matches; _i < matches_2.length; _i++) {
+                    var match = matches_2[_i];
+                    var kind = match.kind;
+                    if (kind < bestMatchKind) {
+                        bestMatchKind = kind;
+                    }
+                }
+                return bestMatchKind;
+            }
+            function compareNavigateToItems(i1, i2) {
+                // TODO(cyrusn): get the gamut of comparisons that VS already uses here.
+                // Right now we just sort by kind first, and then by name of the item.
+                // We first sort case insensitively.  So "Aaa" will come before "bar".
+                // Then we sort case sensitively, so "aaa" will come before "Aaa".
+                return i1.matchKind - i2.matchKind ||
+                    i1.name.localeCompare(i2.name, undefined, baseSensitivity) ||
+                    i1.name.localeCompare(i2.name);
+            }
+            function createNavigateToItem(rawItem) {
+                var declaration = rawItem.declaration;
+                var container = ts.getContainerNode(declaration);
+                return {
+                    name: rawItem.name,
+                    kind: ts.getNodeKind(declaration),
+                    kindModifiers: ts.getNodeModifiers(declaration),
+                    matchKind: ts.PatternMatchKind[rawItem.matchKind],
+                    isCaseSensitive: rawItem.isCaseSensitive,
+                    fileName: rawItem.fileName,
+                    textSpan: ts.createTextSpanFromBounds(declaration.getStart(), declaration.getEnd()),
+                    // TODO(jfreeman): What should be the containerName when the container has a computed name?
+                    containerName: container && container.name ? container.name.text : "",
+                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
+                };
+            }
+        }
+        NavigateTo.getNavigateToItems = getNavigateToItems;
+    })(NavigateTo = ts.NavigateTo || (ts.NavigateTo = {}));
+})(ts || (ts = {}));
+/// <reference path='services.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var NavigationBar;
+    (function (NavigationBar) {
+        function getNavigationBarItems(sourceFile, compilerOptions) {
+            // TODO: Handle JS files differently in 'navbar' calls for now, but ideally we should unify
+            // the 'navbar' and 'navto' logic for TypeScript and JavaScript.
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                return getJsNavigationBarItems(sourceFile, compilerOptions);
+            }
+            return getItemsWorker(getTopLevelNodes(sourceFile), createTopLevelItem);
+            function getIndent(node) {
+                var indent = 1; // Global node is the only one with indent 0.
+                var current = node.parent;
+                while (current) {
+                    switch (current.kind) {
+                        case 225 /* ModuleDeclaration */:
+                            // If we have a module declared as A.B.C, it is more "intuitive"
+                            // to say it only has a single layer of depth
+                            do {
+                                current = current.parent;
+                            } while (current.kind === 225 /* ModuleDeclaration */);
+                        // fall through
+                        case 221 /* ClassDeclaration */:
+                        case 224 /* EnumDeclaration */:
+                        case 222 /* InterfaceDeclaration */:
+                        case 220 /* FunctionDeclaration */:
+                            indent++;
+                    }
+                    current = current.parent;
+                }
+                return indent;
+            }
+            function getChildNodes(nodes) {
+                var childNodes = [];
+                function visit(node) {
+                    switch (node.kind) {
+                        case 200 /* VariableStatement */:
+                            ts.forEach(node.declarationList.declarations, visit);
+                            break;
+                        case 167 /* ObjectBindingPattern */:
+                        case 168 /* ArrayBindingPattern */:
+                            ts.forEach(node.elements, visit);
+                            break;
+                        case 236 /* ExportDeclaration */:
+                            // Handle named exports case e.g.:
+                            //    export {a, b as B} from "mod";
+                            if (node.exportClause) {
+                                ts.forEach(node.exportClause.elements, visit);
+                            }
+                            break;
+                        case 230 /* ImportDeclaration */:
+                            var importClause = node.importClause;
+                            if (importClause) {
+                                // Handle default import case e.g.:
+                                //    import d from "mod";
+                                if (importClause.name) {
+                                    childNodes.push(importClause);
+                                }
+                                // Handle named bindings in imports e.g.:
+                                //    import * as NS from "mod";
+                                //    import {a, b as B} from "mod";
+                                if (importClause.namedBindings) {
+                                    if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                                        childNodes.push(importClause.namedBindings);
+                                    }
+                                    else {
+                                        ts.forEach(importClause.namedBindings.elements, visit);
+                                    }
+                                }
+                            }
+                            break;
+                        case 169 /* BindingElement */:
+                        case 218 /* VariableDeclaration */:
+                            if (ts.isBindingPattern(node.name)) {
+                                visit(node.name);
+                                break;
+                            }
+                        // Fall through
+                        case 221 /* ClassDeclaration */:
+                        case 224 /* EnumDeclaration */:
+                        case 222 /* InterfaceDeclaration */:
+                        case 225 /* ModuleDeclaration */:
+                        case 220 /* FunctionDeclaration */:
+                        case 229 /* ImportEqualsDeclaration */:
+                        case 234 /* ImportSpecifier */:
+                        case 238 /* ExportSpecifier */:
+                        case 223 /* TypeAliasDeclaration */:
+                            childNodes.push(node);
+                            break;
+                    }
+                }
+                // for (let i = 0, n = nodes.length; i < n; i++) {
+                //    let node = nodes[i];
+                //    if (node.kind === SyntaxKind.ClassDeclaration ||
+                //        node.kind === SyntaxKind.EnumDeclaration ||
+                //        node.kind === SyntaxKind.InterfaceDeclaration ||
+                //        node.kind === SyntaxKind.ModuleDeclaration ||
+                //        node.kind === SyntaxKind.FunctionDeclaration) {
+                //        childNodes.push(node);
+                //    }
+                //    else if (node.kind === SyntaxKind.VariableStatement) {
+                //        childNodes.push.apply(childNodes, (<VariableStatement>node).declarations);
+                //    }
+                // }
+                ts.forEach(nodes, visit);
+                return sortNodes(childNodes);
+            }
+            function getTopLevelNodes(node) {
+                var topLevelNodes = [];
+                topLevelNodes.push(node);
+                addTopLevelNodes(node.statements, topLevelNodes);
+                return topLevelNodes;
+            }
+            function sortNodes(nodes) {
+                return nodes.slice(0).sort(function (n1, n2) {
+                    if (n1.name && n2.name) {
+                        return localeCompareFix(ts.getPropertyNameForPropertyNameNode(n1.name), ts.getPropertyNameForPropertyNameNode(n2.name));
+                    }
+                    else if (n1.name) {
+                        return 1;
+                    }
+                    else if (n2.name) {
+                        return -1;
+                    }
+                    else {
+                        return n1.kind - n2.kind;
+                    }
+                });
+                // node 0.10 treats "a" as greater than "B".
+                // For consistency, sort alphabetically, falling back to which is lower-case.
+                function localeCompareFix(a, b) {
+                    var cmp = a.toLowerCase().localeCompare(b.toLowerCase());
+                    if (cmp !== 0)
+                        return cmp;
+                    // Return the *opposite* of the `<` operator, which works the same in node 0.10 and 6.0.
+                    return a < b ? 1 : a > b ? -1 : 0;
+                }
+            }
+            function addTopLevelNodes(nodes, topLevelNodes) {
+                nodes = sortNodes(nodes);
+                for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
+                    var node = nodes_4[_i];
+                    switch (node.kind) {
+                        case 221 /* ClassDeclaration */:
+                            topLevelNodes.push(node);
+                            for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                                var member = _b[_a];
+                                if (member.kind === 147 /* MethodDeclaration */ || member.kind === 148 /* Constructor */) {
+                                    if (member.body) {
+                                        // We do not include methods that does not have child functions in it, because of duplications.
+                                        if (hasNamedFunctionDeclarations(member.body.statements)) {
+                                            topLevelNodes.push(member);
+                                        }
+                                        addTopLevelNodes(member.body.statements, topLevelNodes);
+                                    }
+                                }
+                            }
+                            break;
+                        case 224 /* EnumDeclaration */:
+                        case 222 /* InterfaceDeclaration */:
+                        case 223 /* TypeAliasDeclaration */:
+                            topLevelNodes.push(node);
+                            break;
+                        case 225 /* ModuleDeclaration */:
+                            var moduleDeclaration = node;
+                            topLevelNodes.push(node);
+                            addTopLevelNodes(getInnermostModule(moduleDeclaration).body.statements, topLevelNodes);
+                            break;
+                        case 220 /* FunctionDeclaration */:
+                            var functionDeclaration = node;
+                            if (isTopLevelFunctionDeclaration(functionDeclaration)) {
+                                topLevelNodes.push(node);
+                                addTopLevelNodes(functionDeclaration.body.statements, topLevelNodes);
+                            }
+                            break;
+                    }
+                }
+            }
+            function hasNamedFunctionDeclarations(nodes) {
+                for (var _i = 0, nodes_5 = nodes; _i < nodes_5.length; _i++) {
+                    var s = nodes_5[_i];
+                    if (s.kind === 220 /* FunctionDeclaration */ && !isEmpty(s.name.text)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function isTopLevelFunctionDeclaration(functionDeclaration) {
+                if (functionDeclaration.kind === 220 /* FunctionDeclaration */) {
+                    // A function declaration is 'top level' if it contains any function declarations
+                    // within it.
+                    if (functionDeclaration.body && functionDeclaration.body.kind === 199 /* Block */) {
+                        // Proper function declarations can only have identifier names
+                        if (hasNamedFunctionDeclarations(functionDeclaration.body.statements)) {
+                            return true;
+                        }
+                        // Or if it is not parented by another function. I.e all functions at module scope are 'top level'.
+                        if (!ts.isFunctionBlock(functionDeclaration.parent)) {
+                            return true;
+                        }
+                        else {
+                            // We have made sure that a grand parent node exists with 'isFunctionBlock()' above.
+                            var grandParentKind = functionDeclaration.parent.parent.kind;
+                            if (grandParentKind === 147 /* MethodDeclaration */ ||
+                                grandParentKind === 148 /* Constructor */) {
+                                return true;
+                            }
+                        }
+                    }
+                }
+                return false;
+            }
+            function getItemsWorker(nodes, createItem) {
+                var items = [];
+                var keyToItem = {};
+                for (var _i = 0, nodes_6 = nodes; _i < nodes_6.length; _i++) {
+                    var child = nodes_6[_i];
+                    var item = createItem(child);
+                    if (item !== undefined) {
+                        if (item.text.length > 0) {
+                            var key = item.text + "-" + item.kind + "-" + item.indent;
+                            var itemWithSameName = keyToItem[key];
+                            if (itemWithSameName) {
+                                // We had an item with the same name.  Merge these items together.
+                                merge(itemWithSameName, item);
+                            }
+                            else {
+                                keyToItem[key] = item;
+                                items.push(item);
+                            }
+                        }
+                    }
+                }
+                return items;
+            }
+            function merge(target, source) {
+                // First, add any spans in the source to the target.
+                ts.addRange(target.spans, source.spans);
+                if (source.childItems) {
+                    if (!target.childItems) {
+                        target.childItems = [];
+                    }
+                    // Next, recursively merge or add any children in the source as appropriate.
+                    outer: for (var _i = 0, _a = source.childItems; _i < _a.length; _i++) {
+                        var sourceChild = _a[_i];
+                        for (var _b = 0, _c = target.childItems; _b < _c.length; _b++) {
+                            var targetChild = _c[_b];
+                            if (targetChild.text === sourceChild.text && targetChild.kind === sourceChild.kind) {
+                                // Found a match.  merge them.
+                                merge(targetChild, sourceChild);
+                                continue outer;
+                            }
+                        }
+                        // Didn't find a match, just add this child to the list.
+                        target.childItems.push(sourceChild);
+                    }
+                }
+            }
+            function createChildItem(node) {
+                switch (node.kind) {
+                    case 142 /* Parameter */:
+                        if (ts.isBindingPattern(node.name)) {
+                            break;
+                        }
+                        if ((node.flags & 1023 /* Modifier */) === 0) {
+                            return undefined;
+                        }
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberFunctionElement);
+                    case 149 /* GetAccessor */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberGetAccessorElement);
+                    case 150 /* SetAccessor */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberSetAccessorElement);
+                    case 153 /* IndexSignature */:
+                        return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
+                    case 224 /* EnumDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.enumElement);
+                    case 255 /* EnumMember */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 225 /* ModuleDeclaration */:
+                        return createItem(node, getModuleName(node), ts.ScriptElementKind.moduleElement);
+                    case 222 /* InterfaceDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.interfaceElement);
+                    case 223 /* TypeAliasDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.typeElement);
+                    case 151 /* CallSignature */:
+                        return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
+                    case 152 /* ConstructSignature */:
+                        return createItem(node, "new()", ts.ScriptElementKind.constructSignatureElement);
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 221 /* ClassDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.classElement);
+                    case 220 /* FunctionDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.functionElement);
+                    case 218 /* VariableDeclaration */:
+                    case 169 /* BindingElement */:
+                        var variableDeclarationNode = void 0;
+                        var name_36;
+                        if (node.kind === 169 /* BindingElement */) {
+                            name_36 = node.name;
+                            variableDeclarationNode = node;
+                            // binding elements are added only for variable declarations
+                            // bubble up to the containing variable declaration
+                            while (variableDeclarationNode && variableDeclarationNode.kind !== 218 /* VariableDeclaration */) {
+                                variableDeclarationNode = variableDeclarationNode.parent;
+                            }
+                            ts.Debug.assert(variableDeclarationNode !== undefined);
+                        }
+                        else {
+                            ts.Debug.assert(!ts.isBindingPattern(node.name));
+                            variableDeclarationNode = node;
+                            name_36 = node.name;
+                        }
+                        if (ts.isConst(variableDeclarationNode)) {
+                            return createItem(node, getTextOfNode(name_36), ts.ScriptElementKind.constElement);
+                        }
+                        else if (ts.isLet(variableDeclarationNode)) {
+                            return createItem(node, getTextOfNode(name_36), ts.ScriptElementKind.letElement);
+                        }
+                        else {
+                            return createItem(node, getTextOfNode(name_36), ts.ScriptElementKind.variableElement);
+                        }
+                    case 148 /* Constructor */:
+                        return createItem(node, "constructor", ts.ScriptElementKind.constructorImplementationElement);
+                    case 238 /* ExportSpecifier */:
+                    case 234 /* ImportSpecifier */:
+                    case 229 /* ImportEqualsDeclaration */:
+                    case 231 /* ImportClause */:
+                    case 232 /* NamespaceImport */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.alias);
+                }
+                return undefined;
+                function createItem(node, name, scriptElementKind) {
+                    return getNavigationBarItem(name, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)]);
+                }
+            }
+            function isEmpty(text) {
+                return !text || text.trim() === "";
+            }
+            function getNavigationBarItem(text, kind, kindModifiers, spans, childItems, indent) {
+                if (childItems === void 0) { childItems = []; }
+                if (indent === void 0) { indent = 0; }
+                if (isEmpty(text)) {
+                    return undefined;
+                }
+                return {
+                    text: text,
+                    kind: kind,
+                    kindModifiers: kindModifiers,
+                    spans: spans,
+                    childItems: childItems,
+                    indent: indent,
+                    bolded: false,
+                    grayed: false
+                };
+            }
+            function createTopLevelItem(node) {
+                switch (node.kind) {
+                    case 256 /* SourceFile */:
+                        return createSourceFileItem(node);
+                    case 221 /* ClassDeclaration */:
+                        return createClassItem(node);
+                    case 147 /* MethodDeclaration */:
+                    case 148 /* Constructor */:
+                        return createMemberFunctionLikeItem(node);
+                    case 224 /* EnumDeclaration */:
+                        return createEnumItem(node);
+                    case 222 /* InterfaceDeclaration */:
+                        return createInterfaceItem(node);
+                    case 225 /* ModuleDeclaration */:
+                        return createModuleItem(node);
+                    case 220 /* FunctionDeclaration */:
+                        return createFunctionItem(node);
+                    case 223 /* TypeAliasDeclaration */:
+                        return createTypeAliasItem(node);
+                }
+                return undefined;
+                function createModuleItem(node) {
+                    var moduleName = getModuleName(node);
+                    var childItems = getItemsWorker(getChildNodes(getInnermostModule(node).body.statements), createChildItem);
+                    return getNavigationBarItem(moduleName, ts.ScriptElementKind.moduleElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+                function createFunctionItem(node) {
+                    if (node.body && node.body.kind === 199 /* Block */) {
+                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
+                        return getNavigationBarItem(!node.name ? "default" : node.name.text, ts.ScriptElementKind.functionElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                    }
+                    return undefined;
+                }
+                function createTypeAliasItem(node) {
+                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.typeElement, ts.getNodeModifiers(node), [getNodeSpan(node)], [], getIndent(node));
+                }
+                function createMemberFunctionLikeItem(node) {
+                    if (node.body && node.body.kind === 199 /* Block */) {
+                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
+                        var scriptElementKind = void 0;
+                        var memberFunctionName = void 0;
+                        if (node.kind === 147 /* MethodDeclaration */) {
+                            memberFunctionName = ts.getPropertyNameForPropertyNameNode(node.name);
+                            scriptElementKind = ts.ScriptElementKind.memberFunctionElement;
+                        }
+                        else {
+                            memberFunctionName = "constructor";
+                            scriptElementKind = ts.ScriptElementKind.constructorImplementationElement;
+                        }
+                        return getNavigationBarItem(memberFunctionName, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                    }
+                    return undefined;
+                }
+                function createSourceFileItem(node) {
+                    var childItems = getItemsWorker(getChildNodes(node.statements), createChildItem);
+                    var rootName = ts.isExternalModule(node)
+                        ? "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(node.fileName)))) + "\""
+                        : "<global>";
+                    return getNavigationBarItem(rootName, ts.ScriptElementKind.moduleElement, ts.ScriptElementKindModifier.none, [getNodeSpan(node)], childItems);
+                }
+                function createClassItem(node) {
+                    var childItems;
+                    if (node.members) {
+                        var constructor = ts.forEach(node.members, function (member) {
+                            return member.kind === 148 /* Constructor */ && member;
+                        });
+                        // Add the constructor parameters in as children of the class (for property parameters).
+                        // Note that *all non-binding pattern named* parameters will be added to the nodes array, but parameters that
+                        // are not properties will be filtered out later by createChildItem.
+                        var nodes = removeDynamicallyNamedProperties(node);
+                        if (constructor) {
+                            ts.addRange(nodes, ts.filter(constructor.parameters, function (p) { return !ts.isBindingPattern(p.name); }));
+                        }
+                        childItems = getItemsWorker(sortNodes(nodes), createChildItem);
+                    }
+                    var nodeName = !node.name ? "default" : node.name.text;
+                    return getNavigationBarItem(nodeName, ts.ScriptElementKind.classElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+                function createEnumItem(node) {
+                    var childItems = getItemsWorker(sortNodes(removeComputedProperties(node)), createChildItem);
+                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.enumElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+                function createInterfaceItem(node) {
+                    var childItems = getItemsWorker(sortNodes(removeDynamicallyNamedProperties(node)), createChildItem);
+                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.interfaceElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+            }
+            function getModuleName(moduleDeclaration) {
+                // We want to maintain quotation marks.
+                if (ts.isAmbientModule(moduleDeclaration)) {
+                    return getTextOfNode(moduleDeclaration.name);
+                }
+                // Otherwise, we need to aggregate each identifier to build up the qualified name.
+                var result = [];
+                result.push(moduleDeclaration.name.text);
+                while (moduleDeclaration.body && moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) {
+                    moduleDeclaration = moduleDeclaration.body;
+                    result.push(moduleDeclaration.name.text);
+                }
+                return result.join(".");
+            }
+            function removeComputedProperties(node) {
+                return ts.filter(node.members, function (member) { return member.name === undefined || member.name.kind !== 140 /* ComputedPropertyName */; });
+            }
+            /**
+             * Like removeComputedProperties, but retains the properties with well known symbol names
+             */
+            function removeDynamicallyNamedProperties(node) {
+                return ts.filter(node.members, function (member) { return !ts.hasDynamicName(member); });
+            }
+            function getInnermostModule(node) {
+                while (node.body.kind === 225 /* ModuleDeclaration */) {
+                    node = node.body;
+                }
+                return node;
+            }
+            function getNodeSpan(node) {
+                return node.kind === 256 /* SourceFile */
+                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
+                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
+            }
+            function getTextOfNode(node) {
+                return ts.getTextOfNodeFromSourceText(sourceFile.text, node);
+            }
+        }
+        NavigationBar.getNavigationBarItems = getNavigationBarItems;
+        function getJsNavigationBarItems(sourceFile, compilerOptions) {
+            var anonFnText = "<function>";
+            var anonClassText = "<class>";
+            var indent = 0;
+            var rootName = ts.isExternalModule(sourceFile) ?
+                "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(sourceFile.fileName)))) + "\""
+                : "<global>";
+            var sourceFileItem = getNavBarItem(rootName, ts.ScriptElementKind.moduleElement, [getNodeSpan(sourceFile)]);
+            var topItem = sourceFileItem;
+            // Walk the whole file, because we want to also find function expressions - which may be in variable initializer,
+            // call arguments, expressions, etc...
+            ts.forEachChild(sourceFile, visitNode);
+            function visitNode(node) {
+                var newItem = createNavBarItem(node);
+                if (newItem) {
+                    topItem.childItems.push(newItem);
+                }
+                if (node.jsDocComments && node.jsDocComments.length > 0) {
+                    for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        visitNode(jsDocComment);
+                    }
+                }
+                // Add a level if traversing into a container
+                if (newItem && (ts.isFunctionLike(node) || ts.isClassLike(node))) {
+                    var lastTop = topItem;
+                    indent++;
+                    topItem = newItem;
+                    ts.forEachChild(node, visitNode);
+                    topItem = lastTop;
+                    indent--;
+                    // If the last item added was an anonymous function expression, and it had no children, discard it.
+                    if (newItem && newItem.text === anonFnText && newItem.childItems.length === 0) {
+                        topItem.childItems.pop();
+                    }
+                }
+                else {
+                    ts.forEachChild(node, visitNode);
+                }
+            }
+            function createNavBarItem(node) {
+                switch (node.kind) {
+                    case 218 /* VariableDeclaration */:
+                        // Only add to the navbar if at the top-level of the file
+                        // Note: "const" and "let" are also SyntaxKind.VariableDeclarations
+                        if (node.parent /*VariableDeclarationList*/.parent /*VariableStatement*/
+                            .parent /*SourceFile*/.kind !== 256 /* SourceFile */) {
+                            return undefined;
+                        }
+                        // If it is initialized with a function expression, handle it when we reach the function expression node
+                        var varDecl = node;
+                        if (varDecl.initializer && (varDecl.initializer.kind === 179 /* FunctionExpression */ ||
+                            varDecl.initializer.kind === 180 /* ArrowFunction */ ||
+                            varDecl.initializer.kind === 192 /* ClassExpression */)) {
+                            return undefined;
+                        }
+                    // Fall through
+                    case 220 /* FunctionDeclaration */:
+                    case 221 /* ClassDeclaration */:
+                    case 148 /* Constructor */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        // "export default function().." looks just like a regular function/class declaration, except with the 'default' flag
+                        var name_37 = node.flags && (node.flags & 512 /* Default */) && !node.name ? "default" :
+                            node.kind === 148 /* Constructor */ ? "constructor" :
+                                ts.declarationNameToString(node.name);
+                        return getNavBarItem(name_37, getScriptKindForElementKind(node.kind), [getNodeSpan(node)]);
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 192 /* ClassExpression */:
+                        return getDefineModuleItem(node) || getFunctionOrClassExpressionItem(node);
+                    case 147 /* MethodDeclaration */:
+                        var methodDecl = node;
+                        return getNavBarItem(ts.declarationNameToString(methodDecl.name), ts.ScriptElementKind.memberFunctionElement, [getNodeSpan(node)]);
+                    case 235 /* ExportAssignment */:
+                        // e.g. "export default <expr>"
+                        return getNavBarItem("default", ts.ScriptElementKind.variableElement, [getNodeSpan(node)]);
+                    case 231 /* ImportClause */:
+                        if (!node.name) {
+                            // No default import (this node is still a parent of named & namespace imports, which are handled below)
+                            return undefined;
+                        }
+                    // fall through
+                    case 234 /* ImportSpecifier */: // e.g. 'id' in: import {id} from 'mod' (in NamedImports, in ImportClause)
+                    case 232 /* NamespaceImport */: // e.g. '* as ns' in: import * as ns from 'mod' (in ImportClause)
+                    case 238 /* ExportSpecifier */:
+                        // Export specifiers are only interesting if they are reexports from another module, or renamed, else they are already globals
+                        if (node.kind === 238 /* ExportSpecifier */) {
+                            if (!node.parent.parent.moduleSpecifier && !node.propertyName) {
+                                return undefined;
+                            }
+                        }
+                        var decl = node;
+                        if (!decl.name) {
+                            return undefined;
+                        }
+                        var declName = ts.declarationNameToString(decl.name);
+                        return getNavBarItem(declName, ts.ScriptElementKind.constElement, [getNodeSpan(node)]);
+                    case 279 /* JSDocTypedefTag */:
+                        if (node.name) {
+                            return getNavBarItem(node.name.text, ts.ScriptElementKind.typeElement, [getNodeSpan(node)]);
+                        }
+                        else {
+                            var parentNode = node.parent && node.parent.parent;
+                            if (parentNode && parentNode.kind === 200 /* VariableStatement */) {
+                                if (parentNode.declarationList.declarations.length > 0) {
+                                    var nameIdentifier = parentNode.declarationList.declarations[0].name;
+                                    if (nameIdentifier.kind === 69 /* Identifier */) {
+                                        return getNavBarItem(nameIdentifier.text, ts.ScriptElementKind.typeElement, [getNodeSpan(node)]);
+                                    }
+                                }
+                            }
+                        }
+                    default:
+                        return undefined;
+                }
+            }
+            function getNavBarItem(text, kind, spans, kindModifiers) {
+                if (kindModifiers === void 0) { kindModifiers = ts.ScriptElementKindModifier.none; }
+                return {
+                    text: text, kind: kind, kindModifiers: kindModifiers, spans: spans, childItems: [], indent: indent, bolded: false, grayed: false
+                };
+            }
+            function getDefineModuleItem(node) {
+                if (node.kind !== 179 /* FunctionExpression */ && node.kind !== 180 /* ArrowFunction */) {
+                    return undefined;
+                }
+                // No match if this is not a call expression to an identifier named 'define'
+                if (node.parent.kind !== 174 /* CallExpression */) {
+                    return undefined;
+                }
+                var callExpr = node.parent;
+                if (callExpr.expression.kind !== 69 /* Identifier */ || callExpr.expression.getText() !== "define") {
+                    return undefined;
+                }
+                // Return a module of either the given text in the first argument, or of the source file path
+                var defaultName = node.getSourceFile().fileName;
+                if (callExpr.arguments[0].kind === 9 /* StringLiteral */) {
+                    defaultName = (callExpr.arguments[0]).text;
+                }
+                return getNavBarItem(defaultName, ts.ScriptElementKind.moduleElement, [getNodeSpan(node.parent)]);
+            }
+            function getFunctionOrClassExpressionItem(node) {
+                if (node.kind !== 179 /* FunctionExpression */ &&
+                    node.kind !== 180 /* ArrowFunction */ &&
+                    node.kind !== 192 /* ClassExpression */) {
+                    return undefined;
+                }
+                var fnExpr = node;
+                var fnName;
+                if (fnExpr.name && ts.getFullWidth(fnExpr.name) > 0) {
+                    // The expression has an identifier, so use that as the name
+                    fnName = ts.declarationNameToString(fnExpr.name);
+                }
+                else {
+                    // See if it is a var initializer. If so, use the var name.
+                    if (fnExpr.parent.kind === 218 /* VariableDeclaration */) {
+                        fnName = ts.declarationNameToString(fnExpr.parent.name);
+                    }
+                    else if (fnExpr.parent.kind === 187 /* BinaryExpression */ &&
+                        fnExpr.parent.operatorToken.kind === 56 /* EqualsToken */) {
+                        fnName = fnExpr.parent.left.getText();
+                    }
+                    else if (fnExpr.parent.kind === 253 /* PropertyAssignment */ &&
+                        fnExpr.parent.name) {
+                        fnName = fnExpr.parent.name.getText();
+                    }
+                    else {
+                        fnName = node.kind === 192 /* ClassExpression */ ? anonClassText : anonFnText;
+                    }
+                }
+                var scriptKind = node.kind === 192 /* ClassExpression */ ? ts.ScriptElementKind.classElement : ts.ScriptElementKind.functionElement;
+                return getNavBarItem(fnName, scriptKind, [getNodeSpan(node)]);
+            }
+            function getNodeSpan(node) {
+                return node.kind === 256 /* SourceFile */
+                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
+                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
+            }
+            function getScriptKindForElementKind(kind) {
+                switch (kind) {
+                    case 218 /* VariableDeclaration */:
+                        return ts.ScriptElementKind.variableElement;
+                    case 220 /* FunctionDeclaration */:
+                        return ts.ScriptElementKind.functionElement;
+                    case 221 /* ClassDeclaration */:
+                        return ts.ScriptElementKind.classElement;
+                    case 148 /* Constructor */:
+                        return ts.ScriptElementKind.constructorImplementationElement;
+                    case 149 /* GetAccessor */:
+                        return ts.ScriptElementKind.memberGetAccessorElement;
+                    case 150 /* SetAccessor */:
+                        return ts.ScriptElementKind.memberSetAccessorElement;
+                    default:
+                        return "unknown";
+                }
+            }
+            return sourceFileItem.childItems;
+        }
+        NavigationBar.getJsNavigationBarItems = getJsNavigationBarItems;
+    })(NavigationBar = ts.NavigationBar || (ts.NavigationBar = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    // Note(cyrusn): this enum is ordered from strongest match type to weakest match type.
+    (function (PatternMatchKind) {
+        PatternMatchKind[PatternMatchKind["exact"] = 0] = "exact";
+        PatternMatchKind[PatternMatchKind["prefix"] = 1] = "prefix";
+        PatternMatchKind[PatternMatchKind["substring"] = 2] = "substring";
+        PatternMatchKind[PatternMatchKind["camelCase"] = 3] = "camelCase";
+    })(ts.PatternMatchKind || (ts.PatternMatchKind = {}));
+    var PatternMatchKind = ts.PatternMatchKind;
+    function createPatternMatch(kind, punctuationStripped, isCaseSensitive, camelCaseWeight) {
+        return {
+            kind: kind,
+            punctuationStripped: punctuationStripped,
+            isCaseSensitive: isCaseSensitive,
+            camelCaseWeight: camelCaseWeight
+        };
+    }
+    function createPatternMatcher(pattern) {
+        // We'll often see the same candidate string many times when searching (For example, when
+        // we see the name of a module that is used everywhere, or the name of an overload).  As
+        // such, we cache the information we compute about the candidate for the life of this
+        // pattern matcher so we don't have to compute it multiple times.
+        var stringToWordSpans = {};
+        pattern = pattern.trim();
+        var dotSeparatedSegments = pattern.split(".").map(function (p) { return createSegment(p.trim()); });
+        var invalidPattern = dotSeparatedSegments.length === 0 || ts.forEach(dotSeparatedSegments, segmentIsInvalid);
+        return {
+            getMatches: getMatches,
+            getMatchesForLastSegmentOfPattern: getMatchesForLastSegmentOfPattern,
+            patternContainsDots: dotSeparatedSegments.length > 1
+        };
+        // Quick checks so we can bail out when asked to match a candidate.
+        function skipMatch(candidate) {
+            return invalidPattern || !candidate;
+        }
+        function getMatchesForLastSegmentOfPattern(candidate) {
+            if (skipMatch(candidate)) {
+                return undefined;
+            }
+            return matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
+        }
+        function getMatches(candidateContainers, candidate) {
+            if (skipMatch(candidate)) {
+                return undefined;
+            }
+            // First, check that the last part of the dot separated pattern matches the name of the
+            // candidate.  If not, then there's no point in proceeding and doing the more
+            // expensive work.
+            var candidateMatch = matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
+            if (!candidateMatch) {
+                return undefined;
+            }
+            candidateContainers = candidateContainers || [];
+            // -1 because the last part was checked against the name, and only the rest
+            // of the parts are checked against the container.
+            if (dotSeparatedSegments.length - 1 > candidateContainers.length) {
+                // There weren't enough container parts to match against the pattern parts.
+                // So this definitely doesn't match.
+                return undefined;
+            }
+            // So far so good.  Now break up the container for the candidate and check if all
+            // the dotted parts match up correctly.
+            var totalMatch = candidateMatch;
+            for (var i = dotSeparatedSegments.length - 2, j = candidateContainers.length - 1; i >= 0; i -= 1, j -= 1) {
+                var segment = dotSeparatedSegments[i];
+                var containerName = candidateContainers[j];
+                var containerMatch = matchSegment(containerName, segment);
+                if (!containerMatch) {
+                    // This container didn't match the pattern piece.  So there's no match at all.
+                    return undefined;
+                }
+                ts.addRange(totalMatch, containerMatch);
+            }
+            // Success, this symbol's full name matched against the dotted name the user was asking
+            // about.
+            return totalMatch;
+        }
+        function getWordSpans(word) {
+            if (!ts.hasProperty(stringToWordSpans, word)) {
+                stringToWordSpans[word] = breakIntoWordSpans(word);
+            }
+            return stringToWordSpans[word];
+        }
+        function matchTextChunk(candidate, chunk, punctuationStripped) {
+            var index = indexOfIgnoringCase(candidate, chunk.textLowerCase);
+            if (index === 0) {
+                if (chunk.text.length === candidate.length) {
+                    // a) Check if the part matches the candidate entirely, in an case insensitive or
+                    //    sensitive manner.  If it does, return that there was an exact match.
+                    return createPatternMatch(PatternMatchKind.exact, punctuationStripped, /*isCaseSensitive:*/ candidate === chunk.text);
+                }
+                else {
+                    // b) Check if the part is a prefix of the candidate, in a case insensitive or sensitive
+                    //    manner.  If it does, return that there was a prefix match.
+                    return createPatternMatch(PatternMatchKind.prefix, punctuationStripped, /*isCaseSensitive:*/ startsWith(candidate, chunk.text));
+                }
+            }
+            var isLowercase = chunk.isLowerCase;
+            if (isLowercase) {
+                if (index > 0) {
+                    // c) If the part is entirely lowercase, then check if it is contained anywhere in the
+                    //    candidate in a case insensitive manner.  If so, return that there was a substring
+                    //    match.
+                    //
+                    //    Note: We only have a substring match if the lowercase part is prefix match of some
+                    //    word part. That way we don't match something like 'Class' when the user types 'a'.
+                    //    But we would match 'FooAttribute' (since 'Attribute' starts with 'a').
+                    var wordSpans = getWordSpans(candidate);
+                    for (var _i = 0, wordSpans_1 = wordSpans; _i < wordSpans_1.length; _i++) {
+                        var span = wordSpans_1[_i];
+                        if (partStartsWith(candidate, span, chunk.text, /*ignoreCase:*/ true)) {
+                            return createPatternMatch(PatternMatchKind.substring, punctuationStripped, 
+                            /*isCaseSensitive:*/ partStartsWith(candidate, span, chunk.text, /*ignoreCase:*/ false));
+                        }
+                    }
+                }
+            }
+            else {
+                // d) If the part was not entirely lowercase, then check if it is contained in the
+                //    candidate in a case *sensitive* manner. If so, return that there was a substring
+                //    match.
+                if (candidate.indexOf(chunk.text) > 0) {
+                    return createPatternMatch(PatternMatchKind.substring, punctuationStripped, /*isCaseSensitive:*/ true);
+                }
+            }
+            if (!isLowercase) {
+                // e) If the part was not entirely lowercase, then attempt a camel cased match as well.
+                if (chunk.characterSpans.length > 0) {
+                    var candidateParts = getWordSpans(candidate);
+                    var camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, /*ignoreCase:*/ false);
+                    if (camelCaseWeight !== undefined) {
+                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, /*isCaseSensitive:*/ true, /*camelCaseWeight:*/ camelCaseWeight);
+                    }
+                    camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, /*ignoreCase:*/ true);
+                    if (camelCaseWeight !== undefined) {
+                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, /*isCaseSensitive:*/ false, /*camelCaseWeight:*/ camelCaseWeight);
+                    }
+                }
+            }
+            if (isLowercase) {
+                // f) Is the pattern a substring of the candidate starting on one of the candidate's word boundaries?
+                // We could check every character boundary start of the candidate for the pattern. However, that's
+                // an m * n operation in the wost case. Instead, find the first instance of the pattern
+                // substring, and see if it starts on a capital letter. It seems unlikely that the user will try to
+                // filter the list based on a substring that starts on a capital letter and also with a lowercase one.
+                // (Pattern: fogbar, Candidate: quuxfogbarFogBar).
+                if (chunk.text.length < candidate.length) {
+                    if (index > 0 && isUpperCaseLetter(candidate.charCodeAt(index))) {
+                        return createPatternMatch(PatternMatchKind.substring, punctuationStripped, /*isCaseSensitive:*/ false);
+                    }
+                }
+            }
+            return undefined;
+        }
+        function containsSpaceOrAsterisk(text) {
+            for (var i = 0; i < text.length; i++) {
+                var ch = text.charCodeAt(i);
+                if (ch === 32 /* space */ || ch === 42 /* asterisk */) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function matchSegment(candidate, segment) {
+            // First check if the segment matches as is.  This is also useful if the segment contains
+            // characters we would normally strip when splitting into parts that we also may want to
+            // match in the candidate.  For example if the segment is "@int" and the candidate is
+            // "@int", then that will show up as an exact match here.
+            //
+            // Note: if the segment contains a space or an asterisk then we must assume that it's a
+            // multi-word segment.
+            if (!containsSpaceOrAsterisk(segment.totalTextChunk.text)) {
+                var match = matchTextChunk(candidate, segment.totalTextChunk, /*punctuationStripped:*/ false);
+                if (match) {
+                    return [match];
+                }
+            }
+            // The logic for pattern matching is now as follows:
+            //
+            // 1) Break the segment passed in into words.  Breaking is rather simple and a
+            //    good way to think about it that if gives you all the individual alphanumeric words
+            //    of the pattern.
+            //
+            // 2) For each word try to match the word against the candidate value.
+            //
+            // 3) Matching is as follows:
+            //
+            //   a) Check if the word matches the candidate entirely, in an case insensitive or
+            //    sensitive manner.  If it does, return that there was an exact match.
+            //
+            //   b) Check if the word is a prefix of the candidate, in a case insensitive or
+            //      sensitive manner.  If it does, return that there was a prefix match.
+            //
+            //   c) If the word is entirely lowercase, then check if it is contained anywhere in the
+            //      candidate in a case insensitive manner.  If so, return that there was a substring
+            //      match.
+            //
+            //      Note: We only have a substring match if the lowercase part is prefix match of
+            //      some word part. That way we don't match something like 'Class' when the user
+            //      types 'a'. But we would match 'FooAttribute' (since 'Attribute' starts with
+            //      'a').
+            //
+            //   d) If the word was not entirely lowercase, then check if it is contained in the
+            //      candidate in a case *sensitive* manner. If so, return that there was a substring
+            //      match.
+            //
+            //   e) If the word was not entirely lowercase, then attempt a camel cased match as
+            //      well.
+            //
+            //   f) The word is all lower case. Is it a case insensitive substring of the candidate starting
+            //      on a part boundary of the candidate?
+            //
+            // Only if all words have some sort of match is the pattern considered matched.
+            var subWordTextChunks = segment.subWordTextChunks;
+            var matches = undefined;
+            for (var _i = 0, subWordTextChunks_1 = subWordTextChunks; _i < subWordTextChunks_1.length; _i++) {
+                var subWordTextChunk = subWordTextChunks_1[_i];
+                // Try to match the candidate with this word
+                var result = matchTextChunk(candidate, subWordTextChunk, /*punctuationStripped:*/ true);
+                if (!result) {
+                    return undefined;
+                }
+                matches = matches || [];
+                matches.push(result);
+            }
+            return matches;
+        }
+        function partStartsWith(candidate, candidateSpan, pattern, ignoreCase, patternSpan) {
+            var patternPartStart = patternSpan ? patternSpan.start : 0;
+            var patternPartLength = patternSpan ? patternSpan.length : pattern.length;
+            if (patternPartLength > candidateSpan.length) {
+                // Pattern part is longer than the candidate part. There can never be a match.
+                return false;
+            }
+            if (ignoreCase) {
+                for (var i = 0; i < patternPartLength; i++) {
+                    var ch1 = pattern.charCodeAt(patternPartStart + i);
+                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
+                    if (toLowerCase(ch1) !== toLowerCase(ch2)) {
+                        return false;
+                    }
+                }
+            }
+            else {
+                for (var i = 0; i < patternPartLength; i++) {
+                    var ch1 = pattern.charCodeAt(patternPartStart + i);
+                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
+                    if (ch1 !== ch2) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function tryCamelCaseMatch(candidate, candidateParts, chunk, ignoreCase) {
+            var chunkCharacterSpans = chunk.characterSpans;
+            // Note: we may have more pattern parts than candidate parts.  This is because multiple
+            // pattern parts may match a candidate part.  For example "SiUI" against "SimpleUI".
+            // We'll have 3 pattern parts Si/U/I against two candidate parts Simple/UI.  However, U
+            // and I will both match in UI.
+            var currentCandidate = 0;
+            var currentChunkSpan = 0;
+            var firstMatch = undefined;
+            var contiguous = undefined;
+            while (true) {
+                // Let's consider our termination cases
+                if (currentChunkSpan === chunkCharacterSpans.length) {
+                    // We did match! We shall assign a weight to this
+                    var weight = 0;
+                    // Was this contiguous?
+                    if (contiguous) {
+                        weight += 1;
+                    }
+                    // Did we start at the beginning of the candidate?
+                    if (firstMatch === 0) {
+                        weight += 2;
+                    }
+                    return weight;
+                }
+                else if (currentCandidate === candidateParts.length) {
+                    // No match, since we still have more of the pattern to hit
+                    return undefined;
+                }
+                var candidatePart = candidateParts[currentCandidate];
+                var gotOneMatchThisCandidate = false;
+                // Consider the case of matching SiUI against SimpleUIElement. The candidate parts
+                // will be Simple/UI/Element, and the pattern parts will be Si/U/I.  We'll match 'Si'
+                // against 'Simple' first.  Then we'll match 'U' against 'UI'. However, we want to
+                // still keep matching pattern parts against that candidate part.
+                for (; currentChunkSpan < chunkCharacterSpans.length; currentChunkSpan++) {
+                    var chunkCharacterSpan = chunkCharacterSpans[currentChunkSpan];
+                    if (gotOneMatchThisCandidate) {
+                        // We've already gotten one pattern part match in this candidate.  We will
+                        // only continue trying to consumer pattern parts if the last part and this
+                        // part are both upper case.
+                        if (!isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan - 1].start)) ||
+                            !isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan].start))) {
+                            break;
+                        }
+                    }
+                    if (!partStartsWith(candidate, candidatePart, chunk.text, ignoreCase, chunkCharacterSpan)) {
+                        break;
+                    }
+                    gotOneMatchThisCandidate = true;
+                    firstMatch = firstMatch === undefined ? currentCandidate : firstMatch;
+                    // If we were contiguous, then keep that value.  If we weren't, then keep that
+                    // value.  If we don't know, then set the value to 'true' as an initial match is
+                    // obviously contiguous.
+                    contiguous = contiguous === undefined ? true : contiguous;
+                    candidatePart = ts.createTextSpan(candidatePart.start + chunkCharacterSpan.length, candidatePart.length - chunkCharacterSpan.length);
+                }
+                // Check if we matched anything at all.  If we didn't, then we need to unset the
+                // contiguous bit if we currently had it set.
+                // If we haven't set the bit yet, then that means we haven't matched anything so
+                // far, and we don't want to change that.
+                if (!gotOneMatchThisCandidate && contiguous !== undefined) {
+                    contiguous = false;
+                }
+                // Move onto the next candidate.
+                currentCandidate++;
+            }
+        }
+    }
+    ts.createPatternMatcher = createPatternMatcher;
+    function createSegment(text) {
+        return {
+            totalTextChunk: createTextChunk(text),
+            subWordTextChunks: breakPatternIntoTextChunks(text)
+        };
+    }
+    // A segment is considered invalid if we couldn't find any words in it.
+    function segmentIsInvalid(segment) {
+        return segment.subWordTextChunks.length === 0;
+    }
+    function isUpperCaseLetter(ch) {
+        // Fast check for the ascii range.
+        if (ch >= 65 /* A */ && ch <= 90 /* Z */) {
+            return true;
+        }
+        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 2 /* Latest */)) {
+            return false;
+        }
+        // TODO: find a way to determine this for any unicode characters in a
+        // non-allocating manner.
+        var str = String.fromCharCode(ch);
+        return str === str.toUpperCase();
+    }
+    function isLowerCaseLetter(ch) {
+        // Fast check for the ascii range.
+        if (ch >= 97 /* a */ && ch <= 122 /* z */) {
+            return true;
+        }
+        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 2 /* Latest */)) {
+            return false;
+        }
+        // TODO: find a way to determine this for any unicode characters in a
+        // non-allocating manner.
+        var str = String.fromCharCode(ch);
+        return str === str.toLowerCase();
+    }
+    function startsWith(string, search) {
+        for (var i = 0, n = search.length; i < n; i++) {
+            if (string.charCodeAt(i) !== search.charCodeAt(i)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    // Assumes 'value' is already lowercase.
+    function indexOfIgnoringCase(string, value) {
+        for (var i = 0, n = string.length - value.length; i <= n; i++) {
+            if (startsWithIgnoringCase(string, value, i)) {
+                return i;
+            }
+        }
+        return -1;
+    }
+    // Assumes 'value' is already lowercase.
+    function startsWithIgnoringCase(string, value, start) {
+        for (var i = 0, n = value.length; i < n; i++) {
+            var ch1 = toLowerCase(string.charCodeAt(i + start));
+            var ch2 = value.charCodeAt(i);
+            if (ch1 !== ch2) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function toLowerCase(ch) {
+        // Fast convert for the ascii range.
+        if (ch >= 65 /* A */ && ch <= 90 /* Z */) {
+            return 97 /* a */ + (ch - 65 /* A */);
+        }
+        if (ch < 127 /* maxAsciiCharacter */) {
+            return ch;
+        }
+        // TODO: find a way to compute this for any unicode characters in a
+        // non-allocating manner.
+        return String.fromCharCode(ch).toLowerCase().charCodeAt(0);
+    }
+    function isDigit(ch) {
+        // TODO(cyrusn): Find a way to support this for unicode digits.
+        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
+    }
+    function isWordChar(ch) {
+        return isUpperCaseLetter(ch) || isLowerCaseLetter(ch) || isDigit(ch) || ch === 95 /* _ */ || ch === 36 /* $ */;
+    }
+    function breakPatternIntoTextChunks(pattern) {
+        var result = [];
+        var wordStart = 0;
+        var wordLength = 0;
+        for (var i = 0; i < pattern.length; i++) {
+            var ch = pattern.charCodeAt(i);
+            if (isWordChar(ch)) {
+                if (wordLength === 0) {
+                    wordStart = i;
+                }
+                wordLength++;
+            }
+            else {
+                if (wordLength > 0) {
+                    result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
+                    wordLength = 0;
+                }
+            }
+        }
+        if (wordLength > 0) {
+            result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
+        }
+        return result;
+    }
+    function createTextChunk(text) {
+        var textLowerCase = text.toLowerCase();
+        return {
+            text: text,
+            textLowerCase: textLowerCase,
+            isLowerCase: text === textLowerCase,
+            characterSpans: breakIntoCharacterSpans(text)
+        };
+    }
+    /* @internal */ function breakIntoCharacterSpans(identifier) {
+        return breakIntoSpans(identifier, /*word:*/ false);
+    }
+    ts.breakIntoCharacterSpans = breakIntoCharacterSpans;
+    /* @internal */ function breakIntoWordSpans(identifier) {
+        return breakIntoSpans(identifier, /*word:*/ true);
+    }
+    ts.breakIntoWordSpans = breakIntoWordSpans;
+    function breakIntoSpans(identifier, word) {
+        var result = [];
+        var wordStart = 0;
+        for (var i = 1, n = identifier.length; i < n; i++) {
+            var lastIsDigit = isDigit(identifier.charCodeAt(i - 1));
+            var currentIsDigit = isDigit(identifier.charCodeAt(i));
+            var hasTransitionFromLowerToUpper = transitionFromLowerToUpper(identifier, word, i);
+            var hasTransitionFromUpperToLower = transitionFromUpperToLower(identifier, word, i, wordStart);
+            if (charIsPunctuation(identifier.charCodeAt(i - 1)) ||
+                charIsPunctuation(identifier.charCodeAt(i)) ||
+                lastIsDigit !== currentIsDigit ||
+                hasTransitionFromLowerToUpper ||
+                hasTransitionFromUpperToLower) {
+                if (!isAllPunctuation(identifier, wordStart, i)) {
+                    result.push(ts.createTextSpan(wordStart, i - wordStart));
+                }
+                wordStart = i;
+            }
+        }
+        if (!isAllPunctuation(identifier, wordStart, identifier.length)) {
+            result.push(ts.createTextSpan(wordStart, identifier.length - wordStart));
+        }
+        return result;
+    }
+    function charIsPunctuation(ch) {
+        switch (ch) {
+            case 33 /* exclamation */:
+            case 34 /* doubleQuote */:
+            case 35 /* hash */:
+            case 37 /* percent */:
+            case 38 /* ampersand */:
+            case 39 /* singleQuote */:
+            case 40 /* openParen */:
+            case 41 /* closeParen */:
+            case 42 /* asterisk */:
+            case 44 /* comma */:
+            case 45 /* minus */:
+            case 46 /* dot */:
+            case 47 /* slash */:
+            case 58 /* colon */:
+            case 59 /* semicolon */:
+            case 63 /* question */:
+            case 64 /* at */:
+            case 91 /* openBracket */:
+            case 92 /* backslash */:
+            case 93 /* closeBracket */:
+            case 95 /* _ */:
+            case 123 /* openBrace */:
+            case 125 /* closeBrace */:
+                return true;
+        }
+        return false;
+    }
+    function isAllPunctuation(identifier, start, end) {
+        for (var i = start; i < end; i++) {
+            var ch = identifier.charCodeAt(i);
+            // We don't consider _ or $ as punctuation as there may be things with that name.
+            if (!charIsPunctuation(ch) || ch === 95 /* _ */ || ch === 36 /* $ */) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function transitionFromUpperToLower(identifier, word, index, wordStart) {
+        if (word) {
+            // Cases this supports:
+            // 1) IDisposable -> I, Disposable
+            // 2) UIElement -> UI, Element
+            // 3) HTMLDocument -> HTML, Document
+            //
+            // etc.
+            if (index !== wordStart &&
+                index + 1 < identifier.length) {
+                var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
+                var nextIsLower = isLowerCaseLetter(identifier.charCodeAt(index + 1));
+                if (currentIsUpper && nextIsLower) {
+                    // We have a transition from an upper to a lower letter here.  But we only
+                    // want to break if all the letters that preceded are uppercase.  i.e. if we
+                    // have "Foo" we don't want to break that into "F, oo".  But if we have
+                    // "IFoo" or "UIFoo", then we want to break that into "I, Foo" and "UI,
+                    // Foo".  i.e. the last uppercase letter belongs to the lowercase letters
+                    // that follows.  Note: this will make the following not split properly:
+                    // "HELLOthere".  However, these sorts of names do not show up in .Net
+                    // programs.
+                    for (var i = wordStart; i < index; i++) {
+                        if (!isUpperCaseLetter(identifier.charCodeAt(i))) {
+                            return false;
+                        }
+                    }
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+    function transitionFromLowerToUpper(identifier, word, index) {
+        var lastIsUpper = isUpperCaseLetter(identifier.charCodeAt(index - 1));
+        var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
+        // See if the casing indicates we're starting a new word. Note: if we're breaking on
+        // words, then just seeing an upper case character isn't enough.  Instead, it has to
+        // be uppercase and the previous character can't be uppercase.
+        //
+        // For example, breaking "AddMetadata" on words would make: Add Metadata
+        //
+        // on characters would be: A dd M etadata
+        //
+        // Break "AM" on words would be: AM
+        //
+        // on characters would be: A M
+        //
+        // We break the search string on characters.  But we break the symbol name on words.
+        var transition = word
+            ? (currentIsUpper && !lastIsUpper)
+            : currentIsUpper;
+        return transition;
+    }
+})(ts || (ts = {}));
+///<reference path='services.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var SignatureHelp;
+    (function (SignatureHelp) {
+        // A partially written generic type expression is not guaranteed to have the correct syntax tree. the expression could be parsed as less than/greater than expression or a comma expression
+        // or some other combination depending on what the user has typed so far. For the purposes of signature help we need to consider any location after "<" as a possible generic type reference.
+        // To do this, the method will back parse the expression starting at the position required. it will try to parse the current expression as a generic type expression, if it did succeed it
+        // will return the generic identifier that started the expression (e.g. "foo" in "foo<any, |"). It is then up to the caller to ensure that this is a valid generic expression through
+        // looking up the type. The method will also keep track of the parameter index inside the expression.
+        // public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
+        //    let token = Syntax.findTokenOnLeft(syntaxTree.sourceUnit(), position, /*includeSkippedTokens*/ true);
+        //    if (token && TypeScript.Syntax.hasAncestorOfKind(token, TypeScript.SyntaxKind.TypeParameterList)) {
+        //        // We are in the wrong generic list. bail out
+        //        return null;
+        //    }
+        //    let stack = 0;
+        //    let argumentIndex = 0;
+        //    whileLoop:
+        //    while (token) {
+        //        switch (token.kind()) {
+        //            case TypeScript.SyntaxKind.LessThanToken:
+        //                if (stack === 0) {
+        //                    // Found the beginning of the generic argument expression
+        //                    let lessThanToken = token;
+        //                    token = previousToken(token, /*includeSkippedTokens*/ true);
+        //                    if (!token || token.kind() !== TypeScript.SyntaxKind.IdentifierName) {
+        //                        break whileLoop;
+        //                    }
+        //                    // Found the name, return the data
+        //                    return {
+        //                        genericIdentifer: token,
+        //                        lessThanToken: lessThanToken,
+        //                        argumentIndex: argumentIndex
+        //                    };
+        //                }
+        //                else if (stack < 0) {
+        //                    // Seen one too many less than tokens, bail out
+        //                    break whileLoop;
+        //                }
+        //                else {
+        //                    stack--;
+        //                }
+        //                break;
+        //            case TypeScript.SyntaxKind.GreaterThanGreaterThanGreaterThanToken:
+        //                stack++;
+        //            // Intentional fall through
+        //            case TypeScript.SyntaxKind.GreaterThanToken:
+        //                stack++;
+        //                break;
+        //            case TypeScript.SyntaxKind.CommaToken:
+        //                if (stack == 0) {
+        //                    argumentIndex++;
+        //                }
+        //                break;
+        //            case TypeScript.SyntaxKind.CloseBraceToken:
+        //                // This can be object type, skip untill we find the matching open brace token
+        //                let unmatchedOpenBraceTokens = 0;
+        //                // Skip untill the matching open brace token
+        //                token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseBraceToken, TypeScript.SyntaxKind.OpenBraceToken);
+        //                if (!token) {
+        //                    // No matching token was found. bail out
+        //                    break whileLoop;
+        //                }
+        //                break;
+        //            case TypeScript.SyntaxKind.EqualsGreaterThanToken:
+        //                // This can be a function type or a constructor type. In either case, we want to skip the function definition
+        //                token = previousToken(token, /*includeSkippedTokens*/ true);
+        //                if (token && token.kind() === TypeScript.SyntaxKind.CloseParenToken) {
+        //                    // Skip untill the matching open paren token
+        //                    token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseParenToken, TypeScript.SyntaxKind.OpenParenToken);
+        //                    if (token && token.kind() === TypeScript.SyntaxKind.GreaterThanToken) {
+        //                        // Another generic type argument list, skip it\
+        //                        token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.GreaterThanToken, TypeScript.SyntaxKind.LessThanToken);
+        //                    }
+        //                    if (token && token.kind() === TypeScript.SyntaxKind.NewKeyword) {
+        //                        // In case this was a constructor type, skip the new keyword
+        //                        token = previousToken(token, /*includeSkippedTokens*/ true);
+        //                    }
+        //                    if (!token) {
+        //                        // No matching token was found. bail out
+        //                        break whileLoop;
+        //                    }
+        //                }
+        //                else {
+        //                    // This is not a function type. exit the main loop
+        //                    break whileLoop;
+        //                }
+        //                break;
+        //            case TypeScript.SyntaxKind.IdentifierName:
+        //            case TypeScript.SyntaxKind.AnyKeyword:
+        //            case TypeScript.SyntaxKind.NumberKeyword:
+        //            case TypeScript.SyntaxKind.StringKeyword:
+        //            case TypeScript.SyntaxKind.VoidKeyword:
+        //            case TypeScript.SyntaxKind.BooleanKeyword:
+        //            case TypeScript.SyntaxKind.DotToken:
+        //            case TypeScript.SyntaxKind.OpenBracketToken:
+        //            case TypeScript.SyntaxKind.CloseBracketToken:
+        //                // Valid tokens in a type name. Skip.
+        //                break;
+        //            default:
+        //                break whileLoop;
+        //        }
+        //        token = previousToken(token, /*includeSkippedTokens*/ true);
+        //    }
+        //    return null;
+        // }
+        // private static moveBackUpTillMatchingTokenKind(token: TypeScript.ISyntaxToken, tokenKind: TypeScript.SyntaxKind, matchingTokenKind: TypeScript.SyntaxKind): TypeScript.ISyntaxToken {
+        //    if (!token || token.kind() !== tokenKind) {
+        //        throw TypeScript.Errors.invalidOperation();
+        //    }
+        //    // Skip the current token
+        //    token = previousToken(token, /*includeSkippedTokens*/ true);
+        //    let stack = 0;
+        //    while (token) {
+        //        if (token.kind() === matchingTokenKind) {
+        //            if (stack === 0) {
+        //                // Found the matching token, return
+        //                return token;
+        //            }
+        //            else if (stack < 0) {
+        //                // tokens overlapped.. bail out.
+        //                break;
+        //            }
+        //            else {
+        //                stack--;
+        //            }
+        //        }
+        //        else if (token.kind() === tokenKind) {
+        //            stack++;
+        //        }
+        //        // Move back
+        //        token = previousToken(token, /*includeSkippedTokens*/ true);
+        //    }
+        //    // Did not find matching token
+        //    return null;
+        // }
+        var emptyArray = [];
+        (function (ArgumentListKind) {
+            ArgumentListKind[ArgumentListKind["TypeArguments"] = 0] = "TypeArguments";
+            ArgumentListKind[ArgumentListKind["CallArguments"] = 1] = "CallArguments";
+            ArgumentListKind[ArgumentListKind["TaggedTemplateArguments"] = 2] = "TaggedTemplateArguments";
+        })(SignatureHelp.ArgumentListKind || (SignatureHelp.ArgumentListKind = {}));
+        var ArgumentListKind = SignatureHelp.ArgumentListKind;
+        function getSignatureHelpItems(program, sourceFile, position, cancellationToken) {
+            var typeChecker = program.getTypeChecker();
+            // Decide whether to show signature help
+            var startingToken = ts.findTokenOnLeftOfPosition(sourceFile, position);
+            if (!startingToken) {
+                // We are at the beginning of the file
+                return undefined;
+            }
+            var argumentInfo = getContainingArgumentInfo(startingToken, position, sourceFile);
+            cancellationToken.throwIfCancellationRequested();
+            // Semantic filtering of signature help
+            if (!argumentInfo) {
+                return undefined;
+            }
+            var call = argumentInfo.invocation;
+            var candidates = [];
+            var resolvedSignature = typeChecker.getResolvedSignature(call, candidates);
+            cancellationToken.throwIfCancellationRequested();
+            if (!candidates.length) {
+                // We didn't have any sig help items produced by the TS compiler.  If this is a JS
+                // file, then see if we can figure out anything better.
+                if (ts.isSourceFileJavaScript(sourceFile)) {
+                    return createJavaScriptSignatureHelpItems(argumentInfo, program);
+                }
+                return undefined;
+            }
+            return createSignatureHelpItems(candidates, resolvedSignature, argumentInfo, typeChecker);
+        }
+        SignatureHelp.getSignatureHelpItems = getSignatureHelpItems;
+        function createJavaScriptSignatureHelpItems(argumentInfo, program) {
+            if (argumentInfo.invocation.kind !== 174 /* CallExpression */) {
+                return undefined;
+            }
+            // See if we can find some symbol with the call expression name that has call signatures.
+            var callExpression = argumentInfo.invocation;
+            var expression = callExpression.expression;
+            var name = expression.kind === 69 /* Identifier */
+                ? expression
+                : expression.kind === 172 /* PropertyAccessExpression */
+                    ? expression.name
+                    : undefined;
+            if (!name || !name.text) {
+                return undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            for (var _i = 0, _a = program.getSourceFiles(); _i < _a.length; _i++) {
+                var sourceFile = _a[_i];
+                var nameToDeclarations = sourceFile.getNamedDeclarations();
+                var declarations = ts.getProperty(nameToDeclarations, name.text);
+                if (declarations) {
+                    for (var _b = 0, declarations_8 = declarations; _b < declarations_8.length; _b++) {
+                        var declaration = declarations_8[_b];
+                        var symbol = declaration.symbol;
+                        if (symbol) {
+                            var type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
+                            if (type) {
+                                var callSignatures = type.getCallSignatures();
+                                if (callSignatures && callSignatures.length) {
+                                    return createSignatureHelpItems(callSignatures, callSignatures[0], argumentInfo, typeChecker);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        /**
+         * Returns relevant information for the argument list and the current argument if we are
+         * in the argument of an invocation; returns undefined otherwise.
+         */
+        function getImmediatelyContainingArgumentInfo(node, position, sourceFile) {
+            if (node.parent.kind === 174 /* CallExpression */ || node.parent.kind === 175 /* NewExpression */) {
+                var callExpression = node.parent;
+                // There are 3 cases to handle:
+                //   1. The token introduces a list, and should begin a sig help session
+                //   2. The token is either not associated with a list, or ends a list, so the session should end
+                //   3. The token is buried inside a list, and should give sig help
+                //
+                // The following are examples of each:
+                //
+                //    Case 1:
+                //          foo<#T, U>(#a, b)    -> The token introduces a list, and should begin a sig help session
+                //    Case 2:
+                //          fo#o<T, U>#(a, b)#   -> The token is either not associated with a list, or ends a list, so the session should end
+                //    Case 3:
+                //          foo<T#, U#>(a#, #b#) -> The token is buried inside a list, and should give sig help
+                // Find out if 'node' is an argument, a type argument, or neither
+                if (node.kind === 25 /* LessThanToken */ ||
+                    node.kind === 17 /* OpenParenToken */) {
+                    // Find the list that starts right *after* the < or ( token.
+                    // If the user has just opened a list, consider this item 0.
+                    var list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
+                    var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
+                    ts.Debug.assert(list !== undefined);
+                    return {
+                        kind: isTypeArgList ? 0 /* TypeArguments */ : 1 /* CallArguments */,
+                        invocation: callExpression,
+                        argumentsSpan: getApplicableSpanForArguments(list, sourceFile),
+                        argumentIndex: 0,
+                        argumentCount: getArgumentCount(list)
+                    };
+                }
+                // findListItemInfo can return undefined if we are not in parent's argument list
+                // or type argument list. This includes cases where the cursor is:
+                //   - To the right of the closing paren, non-substitution template, or template tail.
+                //   - Between the type arguments and the arguments (greater than token)
+                //   - On the target of the call (parent.func)
+                //   - On the 'new' keyword in a 'new' expression
+                var listItemInfo = ts.findListItemInfo(node);
+                if (listItemInfo) {
+                    var list = listItemInfo.list;
+                    var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
+                    var argumentIndex = getArgumentIndex(list, node);
+                    var argumentCount = getArgumentCount(list);
+                    ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
+                    return {
+                        kind: isTypeArgList ? 0 /* TypeArguments */ : 1 /* CallArguments */,
+                        invocation: callExpression,
+                        argumentsSpan: getApplicableSpanForArguments(list, sourceFile),
+                        argumentIndex: argumentIndex,
+                        argumentCount: argumentCount
+                    };
+                }
+                return undefined;
+            }
+            else if (node.kind === 11 /* NoSubstitutionTemplateLiteral */ && node.parent.kind === 176 /* TaggedTemplateExpression */) {
+                // Check if we're actually inside the template;
+                // otherwise we'll fall out and return undefined.
+                if (ts.isInsideTemplateLiteral(node, position)) {
+                    return getArgumentListInfoForTemplate(node.parent, /*argumentIndex*/ 0, sourceFile);
+                }
+            }
+            else if (node.kind === 12 /* TemplateHead */ && node.parent.parent.kind === 176 /* TaggedTemplateExpression */) {
+                var templateExpression = node.parent;
+                var tagExpression = templateExpression.parent;
+                ts.Debug.assert(templateExpression.kind === 189 /* TemplateExpression */);
+                var argumentIndex = ts.isInsideTemplateLiteral(node, position) ? 0 : 1;
+                return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
+            }
+            else if (node.parent.kind === 197 /* TemplateSpan */ && node.parent.parent.parent.kind === 176 /* TaggedTemplateExpression */) {
+                var templateSpan = node.parent;
+                var templateExpression = templateSpan.parent;
+                var tagExpression = templateExpression.parent;
+                ts.Debug.assert(templateExpression.kind === 189 /* TemplateExpression */);
+                // If we're just after a template tail, don't show signature help.
+                if (node.kind === 14 /* TemplateTail */ && !ts.isInsideTemplateLiteral(node, position)) {
+                    return undefined;
+                }
+                var spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
+                var argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node, position);
+                return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
+            }
+            return undefined;
+        }
+        function getArgumentIndex(argumentsList, node) {
+            // The list we got back can include commas.  In the presence of errors it may 
+            // also just have nodes without commas.  For example "Foo(a b c)" will have 3 
+            // args without commas.   We want to find what index we're at.  So we count
+            // forward until we hit ourselves, only incrementing the index if it isn't a
+            // comma.
+            //
+            // Note: the subtlety around trailing commas (in getArgumentCount) does not apply
+            // here.  That's because we're only walking forward until we hit the node we're
+            // on.  In that case, even if we're after the trailing comma, we'll still see
+            // that trailing comma in the list, and we'll have generated the appropriate
+            // arg index.
+            var argumentIndex = 0;
+            var listChildren = argumentsList.getChildren();
+            for (var _i = 0, listChildren_1 = listChildren; _i < listChildren_1.length; _i++) {
+                var child = listChildren_1[_i];
+                if (child === node) {
+                    break;
+                }
+                if (child.kind !== 24 /* CommaToken */) {
+                    argumentIndex++;
+                }
+            }
+            return argumentIndex;
+        }
+        function getArgumentCount(argumentsList) {
+            // The argument count for a list is normally the number of non-comma children it has.
+            // For example, if you have "Foo(a,b)" then there will be three children of the arg
+            // list 'a' '<comma>' 'b'.  So, in this case the arg count will be 2.  However, there
+            // is a small subtlety.  If you have  "Foo(a,)", then the child list will just have
+            // 'a' '<comma>'.  So, in the case where the last child is a comma, we increase the
+            // arg count by one to compensate.
+            //
+            // Note: this subtlety only applies to the last comma.  If you had "Foo(a,,"  then 
+            // we'll have:  'a' '<comma>' '<missing>' 
+            // That will give us 2 non-commas.  We then add one for the last comma, givin us an
+            // arg count of 3.
+            var listChildren = argumentsList.getChildren();
+            var argumentCount = ts.countWhere(listChildren, function (arg) { return arg.kind !== 24 /* CommaToken */; });
+            if (listChildren.length > 0 && ts.lastOrUndefined(listChildren).kind === 24 /* CommaToken */) {
+                argumentCount++;
+            }
+            return argumentCount;
+        }
+        // spanIndex is either the index for a given template span.
+        // This does not give appropriate results for a NoSubstitutionTemplateLiteral
+        function getArgumentIndexForTemplatePiece(spanIndex, node, position) {
+            // Because the TemplateStringsArray is the first argument, we have to offset each substitution expression by 1.
+            // There are three cases we can encounter:
+            //      1. We are precisely in the template literal (argIndex = 0).
+            //      2. We are in or to the right of the substitution expression (argIndex = spanIndex + 1).
+            //      3. We are directly to the right of the template literal, but because we look for the token on the left,
+            //          not enough to put us in the substitution expression; we should consider ourselves part of
+            //          the *next* span's expression by offsetting the index (argIndex = (spanIndex + 1) + 1).
+            //
+            // Example: f  `# abcd $#{#  1 + 1#  }# efghi ${ #"#hello"#  }  #  `
+            //              ^       ^ ^       ^   ^          ^ ^      ^     ^
+            // Case:        1       1 3       2   1          3 2      2     1
+            ts.Debug.assert(position >= node.getStart(), "Assumed 'position' could not occur before node.");
+            if (ts.isTemplateLiteralKind(node.kind)) {
+                if (ts.isInsideTemplateLiteral(node, position)) {
+                    return 0;
+                }
+                return spanIndex + 2;
+            }
+            return spanIndex + 1;
+        }
+        function getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile) {
+            // argumentCount is either 1 or (numSpans + 1) to account for the template strings array argument.
+            var argumentCount = tagExpression.template.kind === 11 /* NoSubstitutionTemplateLiteral */
+                ? 1
+                : tagExpression.template.templateSpans.length + 1;
+            ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
+            return {
+                kind: 2 /* TaggedTemplateArguments */,
+                invocation: tagExpression,
+                argumentsSpan: getApplicableSpanForTaggedTemplate(tagExpression, sourceFile),
+                argumentIndex: argumentIndex,
+                argumentCount: argumentCount
+            };
+        }
+        function getApplicableSpanForArguments(argumentsList, sourceFile) {
+            // We use full start and skip trivia on the end because we want to include trivia on
+            // both sides. For example,
+            //
+            //    foo(   /*comment */     a, b, c      /*comment*/     )
+            //        |                                               |
+            //
+            // The applicable span is from the first bar to the second bar (inclusive,
+            // but not including parentheses)
+            var applicableSpanStart = argumentsList.getFullStart();
+            var applicableSpanEnd = ts.skipTrivia(sourceFile.text, argumentsList.getEnd(), /*stopAfterLineBreak*/ false);
+            return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
+        }
+        function getApplicableSpanForTaggedTemplate(taggedTemplate, sourceFile) {
+            var template = taggedTemplate.template;
+            var applicableSpanStart = template.getStart();
+            var applicableSpanEnd = template.getEnd();
+            // We need to adjust the end position for the case where the template does not have a tail.
+            // Otherwise, we will not show signature help past the expression.
+            // For example,
+            //
+            //      `  ${ 1 + 1        foo(10)
+            //       |        |
+            //
+            // This is because a Missing node has no width. However, what we actually want is to include trivia
+            // leading up to the next token in case the user is about to type in a TemplateMiddle or TemplateTail.
+            if (template.kind === 189 /* TemplateExpression */) {
+                var lastSpan = ts.lastOrUndefined(template.templateSpans);
+                if (lastSpan.literal.getFullWidth() === 0) {
+                    applicableSpanEnd = ts.skipTrivia(sourceFile.text, applicableSpanEnd, /*stopAfterLineBreak*/ false);
+                }
+            }
+            return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
+        }
+        function getContainingArgumentInfo(node, position, sourceFile) {
+            for (var n = node; n.kind !== 256 /* SourceFile */; n = n.parent) {
+                if (ts.isFunctionBlock(n)) {
+                    return undefined;
+                }
+                // If the node is not a subspan of its parent, this is a big problem.
+                // There have been crashes that might be caused by this violation.
+                if (n.pos < n.parent.pos || n.end > n.parent.end) {
+                    ts.Debug.fail("Node of kind " + n.kind + " is not a subspan of its parent of kind " + n.parent.kind);
+                }
+                var argumentInfo = getImmediatelyContainingArgumentInfo(n, position, sourceFile);
+                if (argumentInfo) {
+                    return argumentInfo;
+                }
+            }
+            return undefined;
+        }
+        SignatureHelp.getContainingArgumentInfo = getContainingArgumentInfo;
+        function getChildListThatStartsWithOpenerToken(parent, openerToken, sourceFile) {
+            var children = parent.getChildren(sourceFile);
+            var indexOfOpenerToken = children.indexOf(openerToken);
+            ts.Debug.assert(indexOfOpenerToken >= 0 && children.length > indexOfOpenerToken + 1);
+            return children[indexOfOpenerToken + 1];
+        }
+        /**
+         * The selectedItemIndex could be negative for several reasons.
+         *     1. There are too many arguments for all of the overloads
+         *     2. None of the overloads were type compatible
+         * The solution here is to try to pick the best overload by picking
+         * either the first one that has an appropriate number of parameters,
+         * or the one with the most parameters.
+         */
+        function selectBestInvalidOverloadIndex(candidates, argumentCount) {
+            var maxParamsSignatureIndex = -1;
+            var maxParams = -1;
+            for (var i = 0; i < candidates.length; i++) {
+                var candidate = candidates[i];
+                if (candidate.hasRestParameter || candidate.parameters.length >= argumentCount) {
+                    return i;
+                }
+                if (candidate.parameters.length > maxParams) {
+                    maxParams = candidate.parameters.length;
+                    maxParamsSignatureIndex = i;
+                }
+            }
+            return maxParamsSignatureIndex;
+        }
+        function createSignatureHelpItems(candidates, bestSignature, argumentListInfo, typeChecker) {
+            var applicableSpan = argumentListInfo.argumentsSpan;
+            var isTypeParameterList = argumentListInfo.kind === 0 /* TypeArguments */;
+            var invocation = argumentListInfo.invocation;
+            var callTarget = ts.getInvokedExpression(invocation);
+            var callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
+            var callTargetDisplayParts = callTargetSymbol && ts.symbolToDisplayParts(typeChecker, callTargetSymbol, /*enclosingDeclaration*/ undefined, /*meaning*/ undefined);
+            var items = ts.map(candidates, function (candidateSignature) {
+                var signatureHelpParameters;
+                var prefixDisplayParts = [];
+                var suffixDisplayParts = [];
+                if (callTargetDisplayParts) {
+                    ts.addRange(prefixDisplayParts, callTargetDisplayParts);
+                }
+                if (isTypeParameterList) {
+                    prefixDisplayParts.push(ts.punctuationPart(25 /* LessThanToken */));
+                    var typeParameters = candidateSignature.typeParameters;
+                    signatureHelpParameters = typeParameters && typeParameters.length > 0 ? ts.map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
+                    suffixDisplayParts.push(ts.punctuationPart(27 /* GreaterThanToken */));
+                    var parameterParts = ts.mapToDisplayParts(function (writer) {
+                        return typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisType, candidateSignature.parameters, writer, invocation);
+                    });
+                    ts.addRange(suffixDisplayParts, parameterParts);
+                }
+                else {
+                    var typeParameterParts = ts.mapToDisplayParts(function (writer) {
+                        return typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation);
+                    });
+                    ts.addRange(prefixDisplayParts, typeParameterParts);
+                    prefixDisplayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                    var parameters = candidateSignature.parameters;
+                    signatureHelpParameters = parameters.length > 0 ? ts.map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
+                    suffixDisplayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                }
+                var returnTypeParts = ts.mapToDisplayParts(function (writer) {
+                    return typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation);
+                });
+                ts.addRange(suffixDisplayParts, returnTypeParts);
+                return {
+                    isVariadic: candidateSignature.hasRestParameter,
+                    prefixDisplayParts: prefixDisplayParts,
+                    suffixDisplayParts: suffixDisplayParts,
+                    separatorDisplayParts: [ts.punctuationPart(24 /* CommaToken */), ts.spacePart()],
+                    parameters: signatureHelpParameters,
+                    documentation: candidateSignature.getDocumentationComment()
+                };
+            });
+            var argumentIndex = argumentListInfo.argumentIndex;
+            // argumentCount is the *apparent* number of arguments.
+            var argumentCount = argumentListInfo.argumentCount;
+            var selectedItemIndex = candidates.indexOf(bestSignature);
+            if (selectedItemIndex < 0) {
+                selectedItemIndex = selectBestInvalidOverloadIndex(candidates, argumentCount);
+            }
+            ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
+            return {
+                items: items,
+                applicableSpan: applicableSpan,
+                selectedItemIndex: selectedItemIndex,
+                argumentIndex: argumentIndex,
+                argumentCount: argumentCount
+            };
+            function createSignatureHelpParameterForParameter(parameter) {
+                var displayParts = ts.mapToDisplayParts(function (writer) {
+                    return typeChecker.getSymbolDisplayBuilder().buildParameterDisplay(parameter, writer, invocation);
+                });
+                return {
+                    name: parameter.name,
+                    documentation: parameter.getDocumentationComment(),
+                    displayParts: displayParts,
+                    isOptional: typeChecker.isOptionalParameter(parameter.valueDeclaration)
+                };
+            }
+            function createSignatureHelpParameterForTypeParameter(typeParameter) {
+                var displayParts = ts.mapToDisplayParts(function (writer) {
+                    return typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(typeParameter, writer, invocation);
+                });
+                return {
+                    name: typeParameter.symbol.name,
+                    documentation: emptyArray,
+                    displayParts: displayParts,
+                    isOptional: false
+                };
+            }
+        }
+    })(SignatureHelp = ts.SignatureHelp || (ts.SignatureHelp = {}));
+})(ts || (ts = {}));
+// These utilities are common to multiple language service features.
+/* @internal */
+var ts;
+(function (ts) {
+    function getLineStartPositionForPosition(position, sourceFile) {
+        var lineStarts = sourceFile.getLineStarts();
+        var line = sourceFile.getLineAndCharacterOfPosition(position).line;
+        return lineStarts[line];
+    }
+    ts.getLineStartPositionForPosition = getLineStartPositionForPosition;
+    function rangeContainsRange(r1, r2) {
+        return startEndContainsRange(r1.pos, r1.end, r2);
+    }
+    ts.rangeContainsRange = rangeContainsRange;
+    function startEndContainsRange(start, end, range) {
+        return start <= range.pos && end >= range.end;
+    }
+    ts.startEndContainsRange = startEndContainsRange;
+    function rangeContainsStartEnd(range, start, end) {
+        return range.pos <= start && range.end >= end;
+    }
+    ts.rangeContainsStartEnd = rangeContainsStartEnd;
+    function rangeOverlapsWithStartEnd(r1, start, end) {
+        return startEndOverlapsWithStartEnd(r1.pos, r1.end, start, end);
+    }
+    ts.rangeOverlapsWithStartEnd = rangeOverlapsWithStartEnd;
+    function startEndOverlapsWithStartEnd(start1, end1, start2, end2) {
+        var start = Math.max(start1, start2);
+        var end = Math.min(end1, end2);
+        return start < end;
+    }
+    ts.startEndOverlapsWithStartEnd = startEndOverlapsWithStartEnd;
+    function positionBelongsToNode(candidate, position, sourceFile) {
+        return candidate.end > position || !isCompletedNode(candidate, sourceFile);
+    }
+    ts.positionBelongsToNode = positionBelongsToNode;
+    function isCompletedNode(n, sourceFile) {
+        if (ts.nodeIsMissing(n)) {
+            return false;
+        }
+        switch (n.kind) {
+            case 221 /* ClassDeclaration */:
+            case 222 /* InterfaceDeclaration */:
+            case 224 /* EnumDeclaration */:
+            case 171 /* ObjectLiteralExpression */:
+            case 167 /* ObjectBindingPattern */:
+            case 159 /* TypeLiteral */:
+            case 199 /* Block */:
+            case 226 /* ModuleBlock */:
+            case 227 /* CaseBlock */:
+                return nodeEndsWith(n, 16 /* CloseBraceToken */, sourceFile);
+            case 252 /* CatchClause */:
+                return isCompletedNode(n.block, sourceFile);
+            case 175 /* NewExpression */:
+                if (!n.arguments) {
+                    return true;
+                }
+            // fall through
+            case 174 /* CallExpression */:
+            case 178 /* ParenthesizedExpression */:
+            case 164 /* ParenthesizedType */:
+                return nodeEndsWith(n, 18 /* CloseParenToken */, sourceFile);
+            case 156 /* FunctionType */:
+            case 157 /* ConstructorType */:
+                return isCompletedNode(n.type, sourceFile);
+            case 148 /* Constructor */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 220 /* FunctionDeclaration */:
+            case 179 /* FunctionExpression */:
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+            case 152 /* ConstructSignature */:
+            case 151 /* CallSignature */:
+            case 180 /* ArrowFunction */:
+                if (n.body) {
+                    return isCompletedNode(n.body, sourceFile);
+                }
+                if (n.type) {
+                    return isCompletedNode(n.type, sourceFile);
+                }
+                // Even though type parameters can be unclosed, we can get away with
+                // having at least a closing paren.
+                return hasChildOfKind(n, 18 /* CloseParenToken */, sourceFile);
+            case 225 /* ModuleDeclaration */:
+                return n.body && isCompletedNode(n.body, sourceFile);
+            case 203 /* IfStatement */:
+                if (n.elseStatement) {
+                    return isCompletedNode(n.elseStatement, sourceFile);
+                }
+                return isCompletedNode(n.thenStatement, sourceFile);
+            case 202 /* ExpressionStatement */:
+                return isCompletedNode(n.expression, sourceFile) ||
+                    hasChildOfKind(n, 23 /* SemicolonToken */);
+            case 170 /* ArrayLiteralExpression */:
+            case 168 /* ArrayBindingPattern */:
+            case 173 /* ElementAccessExpression */:
+            case 140 /* ComputedPropertyName */:
+            case 161 /* TupleType */:
+                return nodeEndsWith(n, 20 /* CloseBracketToken */, sourceFile);
+            case 153 /* IndexSignature */:
+                if (n.type) {
+                    return isCompletedNode(n.type, sourceFile);
+                }
+                return hasChildOfKind(n, 20 /* CloseBracketToken */, sourceFile);
+            case 249 /* CaseClause */:
+            case 250 /* DefaultClause */:
+                // there is no such thing as terminator token for CaseClause/DefaultClause so for simplicity always consider them non-completed
+                return false;
+            case 206 /* ForStatement */:
+            case 207 /* ForInStatement */:
+            case 208 /* ForOfStatement */:
+            case 205 /* WhileStatement */:
+                return isCompletedNode(n.statement, sourceFile);
+            case 204 /* DoStatement */:
+                // rough approximation: if DoStatement has While keyword - then if node is completed is checking the presence of ')';
+                var hasWhileKeyword = findChildOfKind(n, 104 /* WhileKeyword */, sourceFile);
+                if (hasWhileKeyword) {
+                    return nodeEndsWith(n, 18 /* CloseParenToken */, sourceFile);
+                }
+                return isCompletedNode(n.statement, sourceFile);
+            case 158 /* TypeQuery */:
+                return isCompletedNode(n.exprName, sourceFile);
+            case 182 /* TypeOfExpression */:
+            case 181 /* DeleteExpression */:
+            case 183 /* VoidExpression */:
+            case 190 /* YieldExpression */:
+            case 191 /* SpreadElementExpression */:
+                var unaryWordExpression = n;
+                return isCompletedNode(unaryWordExpression.expression, sourceFile);
+            case 176 /* TaggedTemplateExpression */:
+                return isCompletedNode(n.template, sourceFile);
+            case 189 /* TemplateExpression */:
+                var lastSpan = ts.lastOrUndefined(n.templateSpans);
+                return isCompletedNode(lastSpan, sourceFile);
+            case 197 /* TemplateSpan */:
+                return ts.nodeIsPresent(n.literal);
+            case 185 /* PrefixUnaryExpression */:
+                return isCompletedNode(n.operand, sourceFile);
+            case 187 /* BinaryExpression */:
+                return isCompletedNode(n.right, sourceFile);
+            case 188 /* ConditionalExpression */:
+                return isCompletedNode(n.whenFalse, sourceFile);
+            default:
+                return true;
+        }
+    }
+    ts.isCompletedNode = isCompletedNode;
+    /*
+     * Checks if node ends with 'expectedLastToken'.
+     * If child at position 'length - 1' is 'SemicolonToken' it is skipped and 'expectedLastToken' is compared with child at position 'length - 2'.
+     */
+    function nodeEndsWith(n, expectedLastToken, sourceFile) {
+        var children = n.getChildren(sourceFile);
+        if (children.length) {
+            var last = ts.lastOrUndefined(children);
+            if (last.kind === expectedLastToken) {
+                return true;
+            }
+            else if (last.kind === 23 /* SemicolonToken */ && children.length !== 1) {
+                return children[children.length - 2].kind === expectedLastToken;
+            }
+        }
+        return false;
+    }
+    function findListItemInfo(node) {
+        var list = findContainingList(node);
+        // It is possible at this point for syntaxList to be undefined, either if
+        // node.parent had no list child, or if none of its list children contained
+        // the span of node. If this happens, return undefined. The caller should
+        // handle this case.
+        if (!list) {
+            return undefined;
+        }
+        var children = list.getChildren();
+        var listItemIndex = ts.indexOf(children, node);
+        return {
+            listItemIndex: listItemIndex,
+            list: list
+        };
+    }
+    ts.findListItemInfo = findListItemInfo;
+    function hasChildOfKind(n, kind, sourceFile) {
+        return !!findChildOfKind(n, kind, sourceFile);
+    }
+    ts.hasChildOfKind = hasChildOfKind;
+    function findChildOfKind(n, kind, sourceFile) {
+        return ts.forEach(n.getChildren(sourceFile), function (c) { return c.kind === kind && c; });
+    }
+    ts.findChildOfKind = findChildOfKind;
+    function findContainingList(node) {
+        // The node might be a list element (nonsynthetic) or a comma (synthetic). Either way, it will
+        // be parented by the container of the SyntaxList, not the SyntaxList itself.
+        // In order to find the list item index, we first need to locate SyntaxList itself and then search
+        // for the position of the relevant node (or comma).
+        var syntaxList = ts.forEach(node.parent.getChildren(), function (c) {
+            // find syntax list that covers the span of the node
+            if (c.kind === 282 /* SyntaxList */ && c.pos <= node.pos && c.end >= node.end) {
+                return c;
+            }
+        });
+        // Either we didn't find an appropriate list, or the list must contain us.
+        ts.Debug.assert(!syntaxList || ts.contains(syntaxList.getChildren(), node));
+        return syntaxList;
+    }
+    ts.findContainingList = findContainingList;
+    /* Gets the token whose text has range [start, end) and
+     * position >= start and (position < end or (position === end && token is keyword or identifier))
+     */
+    function getTouchingWord(sourceFile, position, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTouchingToken(sourceFile, position, function (n) { return isWord(n.kind); }, includeJsDocComment);
+    }
+    ts.getTouchingWord = getTouchingWord;
+    /* Gets the token whose text has range [start, end) and position >= start
+     * and (position < end or (position === end && token is keyword or identifier or numeric/string literal))
+     */
+    function getTouchingPropertyName(sourceFile, position, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTouchingToken(sourceFile, position, function (n) { return isPropertyName(n.kind); }, includeJsDocComment);
+    }
+    ts.getTouchingPropertyName = getTouchingPropertyName;
+    /** Returns the token if position is in [start, end) or if position === end and includeItemAtEndPosition(token) === true */
+    function getTouchingToken(sourceFile, position, includeItemAtEndPosition, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ false, includeItemAtEndPosition, includeJsDocComment);
+    }
+    ts.getTouchingToken = getTouchingToken;
+    /** Returns a token if position is in [start-of-leading-trivia, end) */
+    function getTokenAtPosition(sourceFile, position, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includeItemAtEndPosition*/ undefined, includeJsDocComment);
+    }
+    ts.getTokenAtPosition = getTokenAtPosition;
+    /** Get the token whose text contains the position */
+    function getTokenAtPositionWorker(sourceFile, position, allowPositionInLeadingTrivia, includeItemAtEndPosition, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        var current = sourceFile;
+        outer: while (true) {
+            if (isToken(current)) {
+                // exit early
+                return current;
+            }
+            if (includeJsDocComment) {
+                var jsDocChildren = ts.filter(current.getChildren(), ts.isJSDocNode);
+                for (var _i = 0, jsDocChildren_1 = jsDocChildren; _i < jsDocChildren_1.length; _i++) {
+                    var jsDocChild = jsDocChildren_1[_i];
+                    var start = allowPositionInLeadingTrivia ? jsDocChild.getFullStart() : jsDocChild.getStart(sourceFile, includeJsDocComment);
+                    if (start <= position) {
+                        var end = jsDocChild.getEnd();
+                        if (position < end || (position === end && jsDocChild.kind === 1 /* EndOfFileToken */)) {
+                            current = jsDocChild;
+                            continue outer;
+                        }
+                        else if (includeItemAtEndPosition && end === position) {
+                            var previousToken = findPrecedingToken(position, sourceFile, jsDocChild);
+                            if (previousToken && includeItemAtEndPosition(previousToken)) {
+                                return previousToken;
+                            }
+                        }
+                    }
+                }
+            }
+            // find the child that contains 'position'
+            for (var i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
+                var child = current.getChildAt(i);
+                // all jsDocComment nodes were already visited
+                if (ts.isJSDocNode(child)) {
+                    continue;
+                }
+                var start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile, includeJsDocComment);
+                if (start <= position) {
+                    var end = child.getEnd();
+                    if (position < end || (position === end && child.kind === 1 /* EndOfFileToken */)) {
+                        current = child;
+                        continue outer;
+                    }
+                    else if (includeItemAtEndPosition && end === position) {
+                        var previousToken = findPrecedingToken(position, sourceFile, child);
+                        if (previousToken && includeItemAtEndPosition(previousToken)) {
+                            return previousToken;
+                        }
+                    }
+                }
+            }
+            return current;
+        }
+    }
+    /**
+      * The token on the left of the position is the token that strictly includes the position
+      * or sits to the left of the cursor if it is on a boundary. For example
+      *
+      *   fo|o               -> will return foo
+      *   foo <comment> |bar -> will return foo
+      *
+      */
+    function findTokenOnLeftOfPosition(file, position) {
+        // Ideally, getTokenAtPosition should return a token. However, it is currently
+        // broken, so we do a check to make sure the result was indeed a token.
+        var tokenAtPosition = getTokenAtPosition(file, position);
+        if (isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
+            return tokenAtPosition;
+        }
+        return findPrecedingToken(position, file);
+    }
+    ts.findTokenOnLeftOfPosition = findTokenOnLeftOfPosition;
+    function findNextToken(previousToken, parent) {
+        return find(parent);
+        function find(n) {
+            if (isToken(n) && n.pos === previousToken.end) {
+                // this is token that starts at the end of previous token - return it
+                return n;
+            }
+            var children = n.getChildren();
+            for (var _i = 0, children_1 = children; _i < children_1.length; _i++) {
+                var child = children_1[_i];
+                var shouldDiveInChildNode = 
+                // previous token is enclosed somewhere in the child
+                (child.pos <= previousToken.pos && child.end > previousToken.end) ||
+                    // previous token ends exactly at the beginning of child
+                    (child.pos === previousToken.end);
+                if (shouldDiveInChildNode && nodeHasTokens(child)) {
+                    return find(child);
+                }
+            }
+            return undefined;
+        }
+    }
+    ts.findNextToken = findNextToken;
+    function findPrecedingToken(position, sourceFile, startNode) {
+        return find(startNode || sourceFile);
+        function findRightmostToken(n) {
+            if (isToken(n) || n.kind === 244 /* JsxText */) {
+                return n;
+            }
+            var children = n.getChildren();
+            var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
+            return candidate && findRightmostToken(candidate);
+        }
+        function find(n) {
+            if (isToken(n) || n.kind === 244 /* JsxText */) {
+                return n;
+            }
+            var children = n.getChildren();
+            for (var i = 0, len = children.length; i < len; i++) {
+                var child = children[i];
+                // condition 'position < child.end' checks if child node end after the position
+                // in the example below this condition will be false for 'aaaa' and 'bbbb' and true for 'ccc'
+                // aaaa___bbbb___$__ccc
+                // after we found child node with end after the position we check if start of the node is after the position.
+                // if yes - then position is in the trivia and we need to look into the previous child to find the token in question.
+                // if no - position is in the node itself so we should recurse in it.
+                // NOTE: JsxText is a weird kind of node that can contain only whitespaces (since they are not counted as trivia).
+                // if this is the case - then we should assume that token in question is located in previous child.
+                if (position < child.end && (nodeHasTokens(child) || child.kind === 244 /* JsxText */)) {
+                    var start = child.getStart(sourceFile);
+                    var lookInPreviousChild = (start >= position) ||
+                        (child.kind === 244 /* JsxText */ && start === child.end); // whitespace only JsxText
+                    if (lookInPreviousChild) {
+                        // actual start of the node is past the position - previous token should be at the end of previous child
+                        var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ i);
+                        return candidate && findRightmostToken(candidate);
+                    }
+                    else {
+                        // candidate should be in this node
+                        return find(child);
+                    }
+                }
+            }
+            ts.Debug.assert(startNode !== undefined || n.kind === 256 /* SourceFile */);
+            // Here we know that none of child token nodes embrace the position,
+            // the only known case is when position is at the end of the file.
+            // Try to find the rightmost token in the file without filtering.
+            // Namely we are skipping the check: 'position < node.end'
+            if (children.length) {
+                var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
+                return candidate && findRightmostToken(candidate);
+            }
+        }
+        /// finds last node that is considered as candidate for search (isCandidate(node) === true) starting from 'exclusiveStartPosition'
+        function findRightmostChildNodeWithTokens(children, exclusiveStartPosition) {
+            for (var i = exclusiveStartPosition - 1; i >= 0; i--) {
+                if (nodeHasTokens(children[i])) {
+                    return children[i];
+                }
+            }
+        }
+    }
+    ts.findPrecedingToken = findPrecedingToken;
+    function isInString(sourceFile, position) {
+        var previousToken = findPrecedingToken(position, sourceFile);
+        if (previousToken &&
+            (previousToken.kind === 9 /* StringLiteral */ || previousToken.kind === 166 /* StringLiteralType */)) {
+            var start = previousToken.getStart();
+            var end = previousToken.getEnd();
+            // To be "in" one of these literals, the position has to be:
+            //   1. entirely within the token text.
+            //   2. at the end position of an unterminated token.
+            //   3. at the end of a regular expression (due to trailing flags like '/foo/g').
+            if (start < position && position < end) {
+                return true;
+            }
+            if (position === end) {
+                return !!previousToken.isUnterminated;
+            }
+        }
+        return false;
+    }
+    ts.isInString = isInString;
+    function isInComment(sourceFile, position) {
+        return isInCommentHelper(sourceFile, position, /*predicate*/ undefined);
+    }
+    ts.isInComment = isInComment;
+    /**
+     * returns true if the position is in between the open and close elements of an JSX expression.
+     */
+    function isInsideJsxElementOrAttribute(sourceFile, position) {
+        var token = getTokenAtPosition(sourceFile, position);
+        if (!token) {
+            return false;
+        }
+        if (token.kind === 244 /* JsxText */) {
+            return true;
+        }
+        // <div>Hello |</div>
+        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 244 /* JsxText */) {
+            return true;
+        }
+        // <div> { | </div> or <div a={| </div>
+        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 248 /* JsxExpression */) {
+            return true;
+        }
+        // <div> {
+        // |
+        // } < /div>
+        if (token && token.kind === 16 /* CloseBraceToken */ && token.parent.kind === 248 /* JsxExpression */) {
+            return true;
+        }
+        // <div>|</div>
+        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 245 /* JsxClosingElement */) {
+            return true;
+        }
+        return false;
+    }
+    ts.isInsideJsxElementOrAttribute = isInsideJsxElementOrAttribute;
+    function isInTemplateString(sourceFile, position) {
+        var token = getTokenAtPosition(sourceFile, position);
+        return ts.isTemplateLiteralKind(token.kind) && position > token.getStart(sourceFile);
+    }
+    ts.isInTemplateString = isInTemplateString;
+    /**
+     * Returns true if the cursor at position in sourceFile is within a comment that additionally
+     * satisfies predicate, and false otherwise.
+     */
+    function isInCommentHelper(sourceFile, position, predicate) {
+        var token = getTokenAtPosition(sourceFile, position);
+        if (token && position <= token.getStart(sourceFile)) {
+            var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
+            // The end marker of a single-line comment does not include the newline character.
+            // In the following case, we are inside a comment (^ denotes the cursor position):
+            //
+            //    // asdf   ^\n
+            //
+            // But for multi-line comments, we don't want to be inside the comment in the following case:
+            //
+            //    /* asdf */^
+            //
+            // Internally, we represent the end of the comment at the newline and closing '/', respectively.
+            return predicate ?
+                ts.forEach(commentRanges, function (c) { return c.pos < position &&
+                    (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end) &&
+                    predicate(c); }) :
+                ts.forEach(commentRanges, function (c) { return c.pos < position &&
+                    (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end); });
+        }
+        return false;
+    }
+    ts.isInCommentHelper = isInCommentHelper;
+    function hasDocComment(sourceFile, position) {
+        var token = getTokenAtPosition(sourceFile, position);
+        // First, we have to see if this position actually landed in a comment.
+        var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
+        return ts.forEach(commentRanges, jsDocPrefix);
+        function jsDocPrefix(c) {
+            var text = sourceFile.text;
+            return text.length >= c.pos + 3 && text[c.pos] === "/" && text[c.pos + 1] === "*" && text[c.pos + 2] === "*";
+        }
+    }
+    ts.hasDocComment = hasDocComment;
+    /**
+     * Get the corresponding JSDocTag node if the position is in a jsDoc comment
+     */
+    function getJsDocTagAtPosition(sourceFile, position) {
+        var node = ts.getTokenAtPosition(sourceFile, position);
+        if (isToken(node)) {
+            switch (node.kind) {
+                case 102 /* VarKeyword */:
+                case 108 /* LetKeyword */:
+                case 74 /* ConstKeyword */:
+                    // if the current token is var, let or const, skip the VariableDeclarationList
+                    node = node.parent === undefined ? undefined : node.parent.parent;
+                    break;
+                default:
+                    node = node.parent;
+                    break;
+            }
+        }
+        if (node) {
+            if (node.jsDocComments) {
+                for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                    var jsDocComment = _a[_i];
+                    for (var _b = 0, _c = jsDocComment.tags; _b < _c.length; _b++) {
+                        var tag = _c[_b];
+                        if (tag.pos <= position && position <= tag.end) {
+                            return tag;
+                        }
+                    }
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getJsDocTagAtPosition = getJsDocTagAtPosition;
+    function nodeHasTokens(n) {
+        // If we have a token or node that has a non-zero width, it must have tokens.
+        // Note, that getWidth() does not take trivia into account.
+        return n.getWidth() !== 0;
+    }
+    function getNodeModifiers(node) {
+        var flags = ts.getCombinedNodeFlags(node);
+        var result = [];
+        if (flags & 8 /* Private */)
+            result.push(ts.ScriptElementKindModifier.privateMemberModifier);
+        if (flags & 16 /* Protected */)
+            result.push(ts.ScriptElementKindModifier.protectedMemberModifier);
+        if (flags & 4 /* Public */)
+            result.push(ts.ScriptElementKindModifier.publicMemberModifier);
+        if (flags & 32 /* Static */)
+            result.push(ts.ScriptElementKindModifier.staticModifier);
+        if (flags & 128 /* Abstract */)
+            result.push(ts.ScriptElementKindModifier.abstractModifier);
+        if (flags & 1 /* Export */)
+            result.push(ts.ScriptElementKindModifier.exportedModifier);
+        if (ts.isInAmbientContext(node))
+            result.push(ts.ScriptElementKindModifier.ambientModifier);
+        return result.length > 0 ? result.join(",") : ts.ScriptElementKindModifier.none;
+    }
+    ts.getNodeModifiers = getNodeModifiers;
+    function getTypeArgumentOrTypeParameterList(node) {
+        if (node.kind === 155 /* TypeReference */ || node.kind === 174 /* CallExpression */) {
+            return node.typeArguments;
+        }
+        if (ts.isFunctionLike(node) || node.kind === 221 /* ClassDeclaration */ || node.kind === 222 /* InterfaceDeclaration */) {
+            return node.typeParameters;
+        }
+        return undefined;
+    }
+    ts.getTypeArgumentOrTypeParameterList = getTypeArgumentOrTypeParameterList;
+    function isToken(n) {
+        return n.kind >= 0 /* FirstToken */ && n.kind <= 138 /* LastToken */;
+    }
+    ts.isToken = isToken;
+    function isWord(kind) {
+        return kind === 69 /* Identifier */ || ts.isKeyword(kind);
+    }
+    ts.isWord = isWord;
+    function isPropertyName(kind) {
+        return kind === 9 /* StringLiteral */ || kind === 8 /* NumericLiteral */ || isWord(kind);
+    }
+    function isComment(kind) {
+        return kind === 2 /* SingleLineCommentTrivia */ || kind === 3 /* MultiLineCommentTrivia */;
+    }
+    ts.isComment = isComment;
+    function isStringOrRegularExpressionOrTemplateLiteral(kind) {
+        if (kind === 9 /* StringLiteral */
+            || kind === 166 /* StringLiteralType */
+            || kind === 10 /* RegularExpressionLiteral */
+            || ts.isTemplateLiteralKind(kind)) {
+            return true;
+        }
+        return false;
+    }
+    ts.isStringOrRegularExpressionOrTemplateLiteral = isStringOrRegularExpressionOrTemplateLiteral;
+    function isPunctuation(kind) {
+        return 15 /* FirstPunctuation */ <= kind && kind <= 68 /* LastPunctuation */;
+    }
+    ts.isPunctuation = isPunctuation;
+    function isInsideTemplateLiteral(node, position) {
+        return ts.isTemplateLiteralKind(node.kind)
+            && (node.getStart() < position && position < node.getEnd()) || (!!node.isUnterminated && position === node.getEnd());
+    }
+    ts.isInsideTemplateLiteral = isInsideTemplateLiteral;
+    function isAccessibilityModifier(kind) {
+        switch (kind) {
+            case 112 /* PublicKeyword */:
+            case 110 /* PrivateKeyword */:
+            case 111 /* ProtectedKeyword */:
+                return true;
+        }
+        return false;
+    }
+    ts.isAccessibilityModifier = isAccessibilityModifier;
+    function compareDataObjects(dst, src) {
+        for (var e in dst) {
+            if (typeof dst[e] === "object") {
+                if (!compareDataObjects(dst[e], src[e])) {
+                    return false;
+                }
+            }
+            else if (typeof dst[e] !== "function") {
+                if (dst[e] !== src[e]) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+    ts.compareDataObjects = compareDataObjects;
+    function isArrayLiteralOrObjectLiteralDestructuringPattern(node) {
+        if (node.kind === 170 /* ArrayLiteralExpression */ ||
+            node.kind === 171 /* ObjectLiteralExpression */) {
+            // [a,b,c] from:
+            // [a, b, c] = someExpression;
+            if (node.parent.kind === 187 /* BinaryExpression */ &&
+                node.parent.left === node &&
+                node.parent.operatorToken.kind === 56 /* EqualsToken */) {
+                return true;
+            }
+            // [a, b, c] from:
+            // for([a, b, c] of expression)
+            if (node.parent.kind === 208 /* ForOfStatement */ &&
+                node.parent.initializer === node) {
+                return true;
+            }
+            // [a, b, c] of
+            // [x, [a, b, c] ] = someExpression
+            // or
+            // {x, a: {a, b, c} } = someExpression
+            if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.kind === 253 /* PropertyAssignment */ ? node.parent.parent : node.parent)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.isArrayLiteralOrObjectLiteralDestructuringPattern = isArrayLiteralOrObjectLiteralDestructuringPattern;
+})(ts || (ts = {}));
+// Display-part writer helpers
+/* @internal */
+var ts;
+(function (ts) {
+    function isFirstDeclarationOfSymbolParameter(symbol) {
+        return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === 142 /* Parameter */;
+    }
+    ts.isFirstDeclarationOfSymbolParameter = isFirstDeclarationOfSymbolParameter;
+    var displayPartWriter = getDisplayPartWriter();
+    function getDisplayPartWriter() {
+        var displayParts;
+        var lineStart;
+        var indent;
+        resetWriter();
+        return {
+            displayParts: function () { return displayParts; },
+            writeKeyword: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.keyword); },
+            writeOperator: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.operator); },
+            writePunctuation: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.punctuation); },
+            writeSpace: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.space); },
+            writeStringLiteral: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.stringLiteral); },
+            writeParameter: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.parameterName); },
+            writeSymbol: writeSymbol,
+            writeLine: writeLine,
+            increaseIndent: function () { indent++; },
+            decreaseIndent: function () { indent--; },
+            clear: resetWriter,
+            trackSymbol: function () { },
+            reportInaccessibleThisError: function () { }
+        };
+        function writeIndent() {
+            if (lineStart) {
+                var indentString = ts.getIndentString(indent);
+                if (indentString) {
+                    displayParts.push(displayPart(indentString, ts.SymbolDisplayPartKind.space));
+                }
+                lineStart = false;
+            }
+        }
+        function writeKind(text, kind) {
+            writeIndent();
+            displayParts.push(displayPart(text, kind));
+        }
+        function writeSymbol(text, symbol) {
+            writeIndent();
+            displayParts.push(symbolPart(text, symbol));
+        }
+        function writeLine() {
+            displayParts.push(lineBreakPart());
+            lineStart = true;
+        }
+        function resetWriter() {
+            displayParts = [];
+            lineStart = true;
+            indent = 0;
+        }
+    }
+    function symbolPart(text, symbol) {
+        return displayPart(text, displayPartKind(symbol), symbol);
+        function displayPartKind(symbol) {
+            var flags = symbol.flags;
+            if (flags & 3 /* Variable */) {
+                return isFirstDeclarationOfSymbolParameter(symbol) ? ts.SymbolDisplayPartKind.parameterName : ts.SymbolDisplayPartKind.localName;
+            }
+            else if (flags & 4 /* Property */) {
+                return ts.SymbolDisplayPartKind.propertyName;
+            }
+            else if (flags & 32768 /* GetAccessor */) {
+                return ts.SymbolDisplayPartKind.propertyName;
+            }
+            else if (flags & 65536 /* SetAccessor */) {
+                return ts.SymbolDisplayPartKind.propertyName;
+            }
+            else if (flags & 8 /* EnumMember */) {
+                return ts.SymbolDisplayPartKind.enumMemberName;
+            }
+            else if (flags & 16 /* Function */) {
+                return ts.SymbolDisplayPartKind.functionName;
+            }
+            else if (flags & 32 /* Class */) {
+                return ts.SymbolDisplayPartKind.className;
+            }
+            else if (flags & 64 /* Interface */) {
+                return ts.SymbolDisplayPartKind.interfaceName;
+            }
+            else if (flags & 384 /* Enum */) {
+                return ts.SymbolDisplayPartKind.enumName;
+            }
+            else if (flags & 1536 /* Module */) {
+                return ts.SymbolDisplayPartKind.moduleName;
+            }
+            else if (flags & 8192 /* Method */) {
+                return ts.SymbolDisplayPartKind.methodName;
+            }
+            else if (flags & 262144 /* TypeParameter */) {
+                return ts.SymbolDisplayPartKind.typeParameterName;
+            }
+            else if (flags & 524288 /* TypeAlias */) {
+                return ts.SymbolDisplayPartKind.aliasName;
+            }
+            else if (flags & 8388608 /* Alias */) {
+                return ts.SymbolDisplayPartKind.aliasName;
+            }
+            return ts.SymbolDisplayPartKind.text;
+        }
+    }
+    ts.symbolPart = symbolPart;
+    function displayPart(text, kind, symbol) {
+        return {
+            text: text,
+            kind: ts.SymbolDisplayPartKind[kind]
+        };
+    }
+    ts.displayPart = displayPart;
+    function spacePart() {
+        return displayPart(" ", ts.SymbolDisplayPartKind.space);
+    }
+    ts.spacePart = spacePart;
+    function keywordPart(kind) {
+        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.keyword);
+    }
+    ts.keywordPart = keywordPart;
+    function punctuationPart(kind) {
+        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.punctuation);
+    }
+    ts.punctuationPart = punctuationPart;
+    function operatorPart(kind) {
+        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.operator);
+    }
+    ts.operatorPart = operatorPart;
+    function textOrKeywordPart(text) {
+        var kind = ts.stringToToken(text);
+        return kind === undefined
+            ? textPart(text)
+            : keywordPart(kind);
+    }
+    ts.textOrKeywordPart = textOrKeywordPart;
+    function textPart(text) {
+        return displayPart(text, ts.SymbolDisplayPartKind.text);
+    }
+    ts.textPart = textPart;
+    var carriageReturnLineFeed = "\r\n";
+    /**
+     * The default is CRLF.
+     */
+    function getNewLineOrDefaultFromHost(host) {
+        return host.getNewLine ? host.getNewLine() : carriageReturnLineFeed;
+    }
+    ts.getNewLineOrDefaultFromHost = getNewLineOrDefaultFromHost;
+    function lineBreakPart() {
+        return displayPart("\n", ts.SymbolDisplayPartKind.lineBreak);
+    }
+    ts.lineBreakPart = lineBreakPart;
+    function mapToDisplayParts(writeDisplayParts) {
+        writeDisplayParts(displayPartWriter);
+        var result = displayPartWriter.displayParts();
+        displayPartWriter.clear();
+        return result;
+    }
+    ts.mapToDisplayParts = mapToDisplayParts;
+    function typeToDisplayParts(typechecker, type, enclosingDeclaration, flags) {
+        return mapToDisplayParts(function (writer) {
+            typechecker.getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        });
+    }
+    ts.typeToDisplayParts = typeToDisplayParts;
+    function symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration, meaning, flags) {
+        return mapToDisplayParts(function (writer) {
+            typeChecker.getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags);
+        });
+    }
+    ts.symbolToDisplayParts = symbolToDisplayParts;
+    function signatureToDisplayParts(typechecker, signature, enclosingDeclaration, flags) {
+        return mapToDisplayParts(function (writer) {
+            typechecker.getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags);
+        });
+    }
+    ts.signatureToDisplayParts = signatureToDisplayParts;
+    function getDeclaredName(typeChecker, symbol, location) {
+        // If this is an export or import specifier it could have been renamed using the 'as' syntax.
+        // If so we want to search for whatever is under the cursor.
+        if (isImportOrExportSpecifierName(location)) {
+            return location.getText();
+        }
+        else if (ts.isStringOrNumericLiteral(location.kind) &&
+            location.parent.kind === 140 /* ComputedPropertyName */) {
+            return location.text;
+        }
+        // Try to get the local symbol if we're dealing with an 'export default'
+        // since that symbol has the "true" name.
+        var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
+        var name = typeChecker.symbolToString(localExportDefaultSymbol || symbol);
+        return name;
+    }
+    ts.getDeclaredName = getDeclaredName;
+    function isImportOrExportSpecifierName(location) {
+        return location.parent &&
+            (location.parent.kind === 234 /* ImportSpecifier */ || location.parent.kind === 238 /* ExportSpecifier */) &&
+            location.parent.propertyName === location;
+    }
+    ts.isImportOrExportSpecifierName = isImportOrExportSpecifierName;
+    /**
+     * Strip off existed single quotes or double quotes from a given string
+     *
+     * @return non-quoted string
+     */
+    function stripQuotes(name) {
+        var length = name.length;
+        if (length >= 2 &&
+            name.charCodeAt(0) === name.charCodeAt(length - 1) &&
+            (name.charCodeAt(0) === 34 /* doubleQuote */ || name.charCodeAt(0) === 39 /* singleQuote */)) {
+            return name.substring(1, length - 1);
+        }
+        ;
+        return name;
+    }
+    ts.stripQuotes = stripQuotes;
+    function scriptKindIs(fileName, host) {
+        var scriptKinds = [];
+        for (var _i = 2; _i < arguments.length; _i++) {
+            scriptKinds[_i - 2] = arguments[_i];
+        }
+        var scriptKind = getScriptKind(fileName, host);
+        return ts.forEach(scriptKinds, function (k) { return k === scriptKind; });
+    }
+    ts.scriptKindIs = scriptKindIs;
+    function getScriptKind(fileName, host) {
+        // First check to see if the script kind was specified by the host. Chances are the host
+        // may override the default script kind for the file extension.
+        var scriptKind;
+        if (host && host.getScriptKind) {
+            scriptKind = host.getScriptKind(fileName);
+        }
+        if (!scriptKind || scriptKind === 0 /* Unknown */) {
+            scriptKind = ts.getScriptKindFromFileName(fileName);
+        }
+        return ts.ensureScriptKind(fileName, scriptKind);
+    }
+    ts.getScriptKind = getScriptKind;
+})(ts || (ts = {}));
+// Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0.
+// See LICENSE.txt in the project root for complete license information.
+/// <reference path='services.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var JsTyping;
+    (function (JsTyping) {
+        ;
+        ;
+        // A map of loose file names to library names
+        // that we are confident require typings
+        var safeList;
+        /**
+         * @param host is the object providing I/O related operations.
+         * @param fileNames are the file names that belong to the same project
+         * @param projectRootPath is the path to the project root directory
+         * @param safeListPath is the path used to retrieve the safe list
+         * @param packageNameToTypingLocation is the map of package names to their cached typing locations
+         * @param typingOptions are used to customize the typing inference process
+         * @param compilerOptions are used as a source for typing inference
+         */
+        function discoverTypings(host, fileNames, projectRootPath, safeListPath, packageNameToTypingLocation, typingOptions, compilerOptions) {
+            // A typing name to typing file path mapping
+            var inferredTypings = {};
+            if (!typingOptions || !typingOptions.enableAutoDiscovery) {
+                return { cachedTypingPaths: [], newTypingNames: [], filesToWatch: [] };
+            }
+            // Only infer typings for .js and .jsx files
+            fileNames = ts.filter(ts.map(fileNames, ts.normalizePath), function (f) { return ts.scriptKindIs(f, /*LanguageServiceHost*/ undefined, 1 /* JS */, 2 /* JSX */); });
+            if (!safeList) {
+                var result = ts.readConfigFile(safeListPath, function (path) { return host.readFile(path); });
+                if (result.config) {
+                    safeList = result.config;
+                }
+                else {
+                    safeList = {};
+                }
+                ;
+            }
+            var filesToWatch = [];
+            // Directories to search for package.json, bower.json and other typing information
+            var searchDirs = [];
+            var exclude = [];
+            mergeTypings(typingOptions.include);
+            exclude = typingOptions.exclude || [];
+            var possibleSearchDirs = ts.map(fileNames, ts.getDirectoryPath);
+            if (projectRootPath !== undefined) {
+                possibleSearchDirs.push(projectRootPath);
+            }
+            searchDirs = ts.deduplicate(possibleSearchDirs);
+            for (var _i = 0, searchDirs_1 = searchDirs; _i < searchDirs_1.length; _i++) {
+                var searchDir = searchDirs_1[_i];
+                var packageJsonPath = ts.combinePaths(searchDir, "package.json");
+                getTypingNamesFromJson(packageJsonPath, filesToWatch);
+                var bowerJsonPath = ts.combinePaths(searchDir, "bower.json");
+                getTypingNamesFromJson(bowerJsonPath, filesToWatch);
+                var nodeModulesPath = ts.combinePaths(searchDir, "node_modules");
+                getTypingNamesFromNodeModuleFolder(nodeModulesPath);
+            }
+            getTypingNamesFromSourceFileNames(fileNames);
+            // Add the cached typing locations for inferred typings that are already installed
+            for (var name_38 in packageNameToTypingLocation) {
+                if (ts.hasProperty(inferredTypings, name_38) && !inferredTypings[name_38]) {
+                    inferredTypings[name_38] = packageNameToTypingLocation[name_38];
+                }
+            }
+            // Remove typings that the user has added to the exclude list
+            for (var _a = 0, exclude_1 = exclude; _a < exclude_1.length; _a++) {
+                var excludeTypingName = exclude_1[_a];
+                delete inferredTypings[excludeTypingName];
+            }
+            var newTypingNames = [];
+            var cachedTypingPaths = [];
+            for (var typing in inferredTypings) {
+                if (inferredTypings[typing] !== undefined) {
+                    cachedTypingPaths.push(inferredTypings[typing]);
+                }
+                else {
+                    newTypingNames.push(typing);
+                }
+            }
+            return { cachedTypingPaths: cachedTypingPaths, newTypingNames: newTypingNames, filesToWatch: filesToWatch };
+            /**
+             * Merge a given list of typingNames to the inferredTypings map
+             */
+            function mergeTypings(typingNames) {
+                if (!typingNames) {
+                    return;
+                }
+                for (var _i = 0, typingNames_1 = typingNames; _i < typingNames_1.length; _i++) {
+                    var typing = typingNames_1[_i];
+                    if (!ts.hasProperty(inferredTypings, typing)) {
+                        inferredTypings[typing] = undefined;
+                    }
+                }
+            }
+            /**
+             * Get the typing info from common package manager json files like package.json or bower.json
+             */
+            function getTypingNamesFromJson(jsonPath, filesToWatch) {
+                var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); });
+                if (result.config) {
+                    var jsonConfig = result.config;
+                    filesToWatch.push(jsonPath);
+                    if (jsonConfig.dependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.dependencies));
+                    }
+                    if (jsonConfig.devDependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.devDependencies));
+                    }
+                    if (jsonConfig.optionalDependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.optionalDependencies));
+                    }
+                    if (jsonConfig.peerDependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.peerDependencies));
+                    }
+                }
+            }
+            /**
+             * Infer typing names from given file names. For example, the file name "jquery-min.2.3.4.js"
+             * should be inferred to the 'jquery' typing name; and "angular-route.1.2.3.js" should be inferred
+             * to the 'angular-route' typing name.
+             * @param fileNames are the names for source files in the project
+             */
+            function getTypingNamesFromSourceFileNames(fileNames) {
+                var jsFileNames = ts.filter(fileNames, ts.hasJavaScriptFileExtension);
+                var inferredTypingNames = ts.map(jsFileNames, function (f) { return ts.removeFileExtension(ts.getBaseFileName(f.toLowerCase())); });
+                var cleanedTypingNames = ts.map(inferredTypingNames, function (f) { return f.replace(/((?:\.|-)min(?=\.|$))|((?:-|\.)\d+)/g, ""); });
+                if (safeList === undefined) {
+                    mergeTypings(cleanedTypingNames);
+                }
+                else {
+                    mergeTypings(ts.filter(cleanedTypingNames, function (f) { return ts.hasProperty(safeList, f); }));
+                }
+                var hasJsxFile = ts.forEach(fileNames, function (f) { return ts.scriptKindIs(f, /*LanguageServiceHost*/ undefined, 2 /* JSX */); });
+                if (hasJsxFile) {
+                    mergeTypings(["react"]);
+                }
+            }
+            /**
+             * Infer typing names from node_module folder
+             * @param nodeModulesPath is the path to the "node_modules" folder
+             */
+            function getTypingNamesFromNodeModuleFolder(nodeModulesPath) {
+                // Todo: add support for ModuleResolutionHost too
+                if (!host.directoryExists(nodeModulesPath)) {
+                    return;
+                }
+                var typingNames = [];
+                var fileNames = host.readDirectory(nodeModulesPath, "*.json", /*exclude*/ undefined, /*depth*/ 2);
+                for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
+                    var fileName = fileNames_1[_i];
+                    var normalizedFileName = ts.normalizePath(fileName);
+                    if (ts.getBaseFileName(normalizedFileName) !== "package.json") {
+                        continue;
+                    }
+                    var result = ts.readConfigFile(normalizedFileName, function (path) { return host.readFile(path); });
+                    if (!result.config) {
+                        continue;
+                    }
+                    var packageJson = result.config;
+                    // npm 3's package.json contains a "_requiredBy" field
+                    // we should include all the top level module names for npm 2, and only module names whose
+                    // "_requiredBy" field starts with "#" or equals "/" for npm 3.
+                    if (packageJson._requiredBy &&
+                        ts.filter(packageJson._requiredBy, function (r) { return r[0] === "#" || r === "/"; }).length === 0) {
+                        continue;
+                    }
+                    // If the package has its own d.ts typings, those will take precedence. Otherwise the package name will be used
+                    // to download d.ts files from DefinitelyTyped
+                    if (!packageJson.name) {
+                        continue;
+                    }
+                    if (packageJson.typings) {
+                        var absolutePath = ts.getNormalizedAbsolutePath(packageJson.typings, ts.getDirectoryPath(normalizedFileName));
+                        inferredTypings[packageJson.name] = absolutePath;
+                    }
+                    else {
+                        typingNames.push(packageJson.name);
+                    }
+                }
+                mergeTypings(typingNames);
+            }
+        }
+        JsTyping.discoverTypings = discoverTypings;
+    })(JsTyping = ts.JsTyping || (ts.JsTyping = {}));
+})(ts || (ts = {}));
+/// <reference path="formatting.ts"/>
+/// <reference path="..\..\compiler\scanner.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var standardScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, 0 /* Standard */);
+        var jsxScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, 1 /* JSX */);
+        /**
+         * Scanner that is currently used for formatting
+         */
+        var scanner;
+        var ScanAction;
+        (function (ScanAction) {
+            ScanAction[ScanAction["Scan"] = 0] = "Scan";
+            ScanAction[ScanAction["RescanGreaterThanToken"] = 1] = "RescanGreaterThanToken";
+            ScanAction[ScanAction["RescanSlashToken"] = 2] = "RescanSlashToken";
+            ScanAction[ScanAction["RescanTemplateToken"] = 3] = "RescanTemplateToken";
+            ScanAction[ScanAction["RescanJsxIdentifier"] = 4] = "RescanJsxIdentifier";
+        })(ScanAction || (ScanAction = {}));
+        function getFormattingScanner(sourceFile, startPos, endPos) {
+            ts.Debug.assert(scanner === undefined);
+            scanner = sourceFile.languageVariant === 1 /* JSX */ ? jsxScanner : standardScanner;
+            scanner.setText(sourceFile.text);
+            scanner.setTextPos(startPos);
+            var wasNewLine = true;
+            var leadingTrivia;
+            var trailingTrivia;
+            var savedPos;
+            var lastScanAction;
+            var lastTokenInfo;
+            return {
+                advance: advance,
+                readTokenInfo: readTokenInfo,
+                isOnToken: isOnToken,
+                getCurrentLeadingTrivia: function () { return leadingTrivia; },
+                lastTrailingTriviaWasNewLine: function () { return wasNewLine; },
+                close: function () {
+                    ts.Debug.assert(scanner !== undefined);
+                    lastTokenInfo = undefined;
+                    scanner.setText(undefined);
+                    scanner = undefined;
+                }
+            };
+            function advance() {
+                ts.Debug.assert(scanner !== undefined);
+                lastTokenInfo = undefined;
+                var isStarted = scanner.getStartPos() !== startPos;
+                if (isStarted) {
+                    if (trailingTrivia) {
+                        ts.Debug.assert(trailingTrivia.length !== 0);
+                        wasNewLine = ts.lastOrUndefined(trailingTrivia).kind === 4 /* NewLineTrivia */;
+                    }
+                    else {
+                        wasNewLine = false;
+                    }
+                }
+                leadingTrivia = undefined;
+                trailingTrivia = undefined;
+                if (!isStarted) {
+                    scanner.scan();
+                }
+                var pos = scanner.getStartPos();
+                // Read leading trivia and token
+                while (pos < endPos) {
+                    var t = scanner.getToken();
+                    if (!ts.isTrivia(t)) {
+                        break;
+                    }
+                    // consume leading trivia
+                    scanner.scan();
+                    var item = {
+                        pos: pos,
+                        end: scanner.getStartPos(),
+                        kind: t
+                    };
+                    pos = scanner.getStartPos();
+                    if (!leadingTrivia) {
+                        leadingTrivia = [];
+                    }
+                    leadingTrivia.push(item);
+                }
+                savedPos = scanner.getStartPos();
+            }
+            function shouldRescanGreaterThanToken(node) {
+                if (node) {
+                    switch (node.kind) {
+                        case 29 /* GreaterThanEqualsToken */:
+                        case 64 /* GreaterThanGreaterThanEqualsToken */:
+                        case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                        case 45 /* GreaterThanGreaterThanGreaterThanToken */:
+                        case 44 /* GreaterThanGreaterThanToken */:
+                            return true;
+                    }
+                }
+                return false;
+            }
+            function shouldRescanJsxIdentifier(node) {
+                if (node.parent) {
+                    switch (node.parent.kind) {
+                        case 246 /* JsxAttribute */:
+                        case 243 /* JsxOpeningElement */:
+                        case 245 /* JsxClosingElement */:
+                        case 242 /* JsxSelfClosingElement */:
+                            return node.kind === 69 /* Identifier */;
+                    }
+                }
+                return false;
+            }
+            function shouldRescanSlashToken(container) {
+                return container.kind === 10 /* RegularExpressionLiteral */;
+            }
+            function shouldRescanTemplateToken(container) {
+                return container.kind === 13 /* TemplateMiddle */ ||
+                    container.kind === 14 /* TemplateTail */;
+            }
+            function startsWithSlashToken(t) {
+                return t === 39 /* SlashToken */ || t === 61 /* SlashEqualsToken */;
+            }
+            function readTokenInfo(n) {
+                ts.Debug.assert(scanner !== undefined);
+                if (!isOnToken()) {
+                    // scanner is not on the token (either advance was not called yet or scanner is already past the end position)
+                    return {
+                        leadingTrivia: leadingTrivia,
+                        trailingTrivia: undefined,
+                        token: undefined
+                    };
+                }
+                // normally scanner returns the smallest available token
+                // check the kind of context node to determine if scanner should have more greedy behavior and consume more text.
+                var expectedScanAction = shouldRescanGreaterThanToken(n)
+                    ? 1 /* RescanGreaterThanToken */
+                    : shouldRescanSlashToken(n)
+                        ? 2 /* RescanSlashToken */
+                        : shouldRescanTemplateToken(n)
+                            ? 3 /* RescanTemplateToken */
+                            : shouldRescanJsxIdentifier(n)
+                                ? 4 /* RescanJsxIdentifier */
+                                : 0 /* Scan */;
+                if (lastTokenInfo && expectedScanAction === lastScanAction) {
+                    // readTokenInfo was called before with the same expected scan action.
+                    // No need to re-scan text, return existing 'lastTokenInfo'
+                    // it is ok to call fixTokenKind here since it does not affect
+                    // what portion of text is consumed. In contrast rescanning can change it,
+                    // i.e. for '>=' when originally scanner eats just one character
+                    // and rescanning forces it to consume more.
+                    return fixTokenKind(lastTokenInfo, n);
+                }
+                if (scanner.getStartPos() !== savedPos) {
+                    ts.Debug.assert(lastTokenInfo !== undefined);
+                    // readTokenInfo was called before but scan action differs - rescan text
+                    scanner.setTextPos(savedPos);
+                    scanner.scan();
+                }
+                var currentToken = scanner.getToken();
+                if (expectedScanAction === 1 /* RescanGreaterThanToken */ && currentToken === 27 /* GreaterThanToken */) {
+                    currentToken = scanner.reScanGreaterToken();
+                    ts.Debug.assert(n.kind === currentToken);
+                    lastScanAction = 1 /* RescanGreaterThanToken */;
+                }
+                else if (expectedScanAction === 2 /* RescanSlashToken */ && startsWithSlashToken(currentToken)) {
+                    currentToken = scanner.reScanSlashToken();
+                    ts.Debug.assert(n.kind === currentToken);
+                    lastScanAction = 2 /* RescanSlashToken */;
+                }
+                else if (expectedScanAction === 3 /* RescanTemplateToken */ && currentToken === 16 /* CloseBraceToken */) {
+                    currentToken = scanner.reScanTemplateToken();
+                    lastScanAction = 3 /* RescanTemplateToken */;
+                }
+                else if (expectedScanAction === 4 /* RescanJsxIdentifier */ && currentToken === 69 /* Identifier */) {
+                    currentToken = scanner.scanJsxIdentifier();
+                    lastScanAction = 4 /* RescanJsxIdentifier */;
+                }
+                else {
+                    lastScanAction = 0 /* Scan */;
+                }
+                var token = {
+                    pos: scanner.getStartPos(),
+                    end: scanner.getTextPos(),
+                    kind: currentToken
+                };
+                // consume trailing trivia
+                if (trailingTrivia) {
+                    trailingTrivia = undefined;
+                }
+                while (scanner.getStartPos() < endPos) {
+                    currentToken = scanner.scan();
+                    if (!ts.isTrivia(currentToken)) {
+                        break;
+                    }
+                    var trivia = {
+                        pos: scanner.getStartPos(),
+                        end: scanner.getTextPos(),
+                        kind: currentToken
+                    };
+                    if (!trailingTrivia) {
+                        trailingTrivia = [];
+                    }
+                    trailingTrivia.push(trivia);
+                    if (currentToken === 4 /* NewLineTrivia */) {
+                        // move past new line
+                        scanner.scan();
+                        break;
+                    }
+                }
+                lastTokenInfo = {
+                    leadingTrivia: leadingTrivia,
+                    trailingTrivia: trailingTrivia,
+                    token: token
+                };
+                return fixTokenKind(lastTokenInfo, n);
+            }
+            function isOnToken() {
+                ts.Debug.assert(scanner !== undefined);
+                var current = (lastTokenInfo && lastTokenInfo.token.kind) || scanner.getToken();
+                var startPos = (lastTokenInfo && lastTokenInfo.token.pos) || scanner.getStartPos();
+                return startPos < endPos && current !== 1 /* EndOfFileToken */ && !ts.isTrivia(current);
+            }
+            // when containing node in the tree is token
+            // but its kind differs from the kind that was returned by the scanner,
+            // then kind needs to be fixed. This might happen in cases
+            // when parser interprets token differently, i.e keyword treated as identifier
+            function fixTokenKind(tokenInfo, container) {
+                if (ts.isToken(container) && tokenInfo.token.kind !== container.kind) {
+                    tokenInfo.token.kind = container.kind;
+                }
+                return tokenInfo;
+            }
+        }
+        formatting.getFormattingScanner = getFormattingScanner;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+/// <reference path="references.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var FormattingContext = (function () {
+            function FormattingContext(sourceFile, formattingRequestKind) {
+                this.sourceFile = sourceFile;
+                this.formattingRequestKind = formattingRequestKind;
+            }
+            FormattingContext.prototype.updateContext = function (currentRange, currentTokenParent, nextRange, nextTokenParent, commonParent) {
+                ts.Debug.assert(currentRange !== undefined, "currentTokenSpan is null");
+                ts.Debug.assert(currentTokenParent !== undefined, "currentTokenParent is null");
+                ts.Debug.assert(nextRange !== undefined, "nextTokenSpan is null");
+                ts.Debug.assert(nextTokenParent !== undefined, "nextTokenParent is null");
+                ts.Debug.assert(commonParent !== undefined, "commonParent is null");
+                this.currentTokenSpan = currentRange;
+                this.currentTokenParent = currentTokenParent;
+                this.nextTokenSpan = nextRange;
+                this.nextTokenParent = nextTokenParent;
+                this.contextNode = commonParent;
+                // drop cached results
+                this.contextNodeAllOnSameLine = undefined;
+                this.nextNodeAllOnSameLine = undefined;
+                this.tokensAreOnSameLine = undefined;
+                this.contextNodeBlockIsOnOneLine = undefined;
+                this.nextNodeBlockIsOnOneLine = undefined;
+            };
+            FormattingContext.prototype.ContextNodeAllOnSameLine = function () {
+                if (this.contextNodeAllOnSameLine === undefined) {
+                    this.contextNodeAllOnSameLine = this.NodeIsOnOneLine(this.contextNode);
+                }
+                return this.contextNodeAllOnSameLine;
+            };
+            FormattingContext.prototype.NextNodeAllOnSameLine = function () {
+                if (this.nextNodeAllOnSameLine === undefined) {
+                    this.nextNodeAllOnSameLine = this.NodeIsOnOneLine(this.nextTokenParent);
+                }
+                return this.nextNodeAllOnSameLine;
+            };
+            FormattingContext.prototype.TokensAreOnSameLine = function () {
+                if (this.tokensAreOnSameLine === undefined) {
+                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(this.currentTokenSpan.pos).line;
+                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(this.nextTokenSpan.pos).line;
+                    this.tokensAreOnSameLine = (startLine === endLine);
+                }
+                return this.tokensAreOnSameLine;
+            };
+            FormattingContext.prototype.ContextNodeBlockIsOnOneLine = function () {
+                if (this.contextNodeBlockIsOnOneLine === undefined) {
+                    this.contextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.contextNode);
+                }
+                return this.contextNodeBlockIsOnOneLine;
+            };
+            FormattingContext.prototype.NextNodeBlockIsOnOneLine = function () {
+                if (this.nextNodeBlockIsOnOneLine === undefined) {
+                    this.nextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.nextTokenParent);
+                }
+                return this.nextNodeBlockIsOnOneLine;
+            };
+            FormattingContext.prototype.NodeIsOnOneLine = function (node) {
+                var startLine = this.sourceFile.getLineAndCharacterOfPosition(node.getStart(this.sourceFile)).line;
+                var endLine = this.sourceFile.getLineAndCharacterOfPosition(node.getEnd()).line;
+                return startLine === endLine;
+            };
+            FormattingContext.prototype.BlockIsOnOneLine = function (node) {
+                var openBrace = ts.findChildOfKind(node, 15 /* OpenBraceToken */, this.sourceFile);
+                var closeBrace = ts.findChildOfKind(node, 16 /* CloseBraceToken */, this.sourceFile);
+                if (openBrace && closeBrace) {
+                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(openBrace.getEnd()).line;
+                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(closeBrace.getStart(this.sourceFile)).line;
+                    return startLine === endLine;
+                }
+                return false;
+            };
+            return FormattingContext;
+        }());
+        formatting.FormattingContext = FormattingContext;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+/// <reference path="references.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        (function (FormattingRequestKind) {
+            FormattingRequestKind[FormattingRequestKind["FormatDocument"] = 0] = "FormatDocument";
+            FormattingRequestKind[FormattingRequestKind["FormatSelection"] = 1] = "FormatSelection";
+            FormattingRequestKind[FormattingRequestKind["FormatOnEnter"] = 2] = "FormatOnEnter";
+            FormattingRequestKind[FormattingRequestKind["FormatOnSemicolon"] = 3] = "FormatOnSemicolon";
+            FormattingRequestKind[FormattingRequestKind["FormatOnClosingCurlyBrace"] = 4] = "FormatOnClosingCurlyBrace";
+        })(formatting.FormattingRequestKind || (formatting.FormattingRequestKind = {}));
+        var FormattingRequestKind = formatting.FormattingRequestKind;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Rule = (function () {
+            function Rule(Descriptor, Operation, Flag) {
+                if (Flag === void 0) { Flag = 0 /* None */; }
+                this.Descriptor = Descriptor;
+                this.Operation = Operation;
+                this.Flag = Flag;
+            }
+            Rule.prototype.toString = function () {
+                return "[desc=" + this.Descriptor + "," +
+                    "operation=" + this.Operation + "," +
+                    "flag=" + this.Flag + "]";
+            };
+            return Rule;
+        }());
+        formatting.Rule = Rule;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        (function (RuleAction) {
+            RuleAction[RuleAction["Ignore"] = 1] = "Ignore";
+            RuleAction[RuleAction["Space"] = 2] = "Space";
+            RuleAction[RuleAction["NewLine"] = 4] = "NewLine";
+            RuleAction[RuleAction["Delete"] = 8] = "Delete";
+        })(formatting.RuleAction || (formatting.RuleAction = {}));
+        var RuleAction = formatting.RuleAction;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleDescriptor = (function () {
+            function RuleDescriptor(LeftTokenRange, RightTokenRange) {
+                this.LeftTokenRange = LeftTokenRange;
+                this.RightTokenRange = RightTokenRange;
+            }
+            RuleDescriptor.prototype.toString = function () {
+                return "[leftRange=" + this.LeftTokenRange + "," +
+                    "rightRange=" + this.RightTokenRange + "]";
+            };
+            RuleDescriptor.create1 = function (left, right) {
+                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), formatting.Shared.TokenRange.FromToken(right));
+            };
+            RuleDescriptor.create2 = function (left, right) {
+                return RuleDescriptor.create4(left, formatting.Shared.TokenRange.FromToken(right));
+            };
+            RuleDescriptor.create3 = function (left, right) {
+                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), right);
+            };
+            RuleDescriptor.create4 = function (left, right) {
+                return new RuleDescriptor(left, right);
+            };
+            return RuleDescriptor;
+        }());
+        formatting.RuleDescriptor = RuleDescriptor;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        (function (RuleFlags) {
+            RuleFlags[RuleFlags["None"] = 0] = "None";
+            RuleFlags[RuleFlags["CanDeleteNewLines"] = 1] = "CanDeleteNewLines";
+        })(formatting.RuleFlags || (formatting.RuleFlags = {}));
+        var RuleFlags = formatting.RuleFlags;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleOperation = (function () {
+            function RuleOperation(Context, Action) {
+                this.Context = Context;
+                this.Action = Action;
+            }
+            RuleOperation.prototype.toString = function () {
+                return "[context=" + this.Context + "," +
+                    "action=" + this.Action + "]";
+            };
+            RuleOperation.create1 = function (action) {
+                return RuleOperation.create2(formatting.RuleOperationContext.Any, action);
+            };
+            RuleOperation.create2 = function (context, action) {
+                return new RuleOperation(context, action);
+            };
+            return RuleOperation;
+        }());
+        formatting.RuleOperation = RuleOperation;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleOperationContext = (function () {
+            function RuleOperationContext() {
+                var funcs = [];
+                for (var _i = 0; _i < arguments.length; _i++) {
+                    funcs[_i - 0] = arguments[_i];
+                }
+                this.customContextChecks = funcs;
+            }
+            RuleOperationContext.prototype.IsAny = function () {
+                return this === RuleOperationContext.Any;
+            };
+            RuleOperationContext.prototype.InContext = function (context) {
+                if (this.IsAny()) {
+                    return true;
+                }
+                for (var _i = 0, _a = this.customContextChecks; _i < _a.length; _i++) {
+                    var check = _a[_i];
+                    if (!check(context)) {
+                        return false;
+                    }
+                }
+                return true;
+            };
+            RuleOperationContext.Any = new RuleOperationContext();
+            return RuleOperationContext;
+        }());
+        formatting.RuleOperationContext = RuleOperationContext;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Rules = (function () {
+            function Rules() {
+                ///
+                /// Common Rules
+                ///
+                // Leave comments alone
+                this.IgnoreBeforeComment = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.Comments), formatting.RuleOperation.create1(1 /* Ignore */));
+                this.IgnoreAfterLineComment = new formatting.Rule(formatting.RuleDescriptor.create3(2 /* SingleLineCommentTrivia */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create1(1 /* Ignore */));
+                // Space after keyword but not before ; or : or ?
+                this.NoSpaceBeforeSemicolon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 23 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeColon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 54 /* ColonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                this.NoSpaceBeforeQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 53 /* QuestionToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                this.SpaceAfterColon = new formatting.Rule(formatting.RuleDescriptor.create3(54 /* ColonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterQuestionMarkInConditionalOperator = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConditionalOperatorContext), 2 /* Space */));
+                this.NoSpaceAfterQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterSemicolon = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Space after }.
+                this.SpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16 /* CloseBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), 2 /* Space */));
+                // Special case for (}, else) and (}, while) since else & while tokens are not part of the tree which makes SpaceAfterCloseBrace rule not applied
+                this.SpaceBetweenCloseBraceAndElse = new formatting.Rule(formatting.RuleDescriptor.create1(16 /* CloseBraceToken */, 80 /* ElseKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBetweenCloseBraceAndWhile = new formatting.Rule(formatting.RuleDescriptor.create1(16 /* CloseBraceToken */, 104 /* WhileKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16 /* CloseBraceToken */, formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 20 /* CloseBracketToken */, 24 /* CommaToken */, 23 /* SemicolonToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // No space for dot
+                this.NoSpaceBeforeDot = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 21 /* DotToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterDot = new formatting.Rule(formatting.RuleDescriptor.create3(21 /* DotToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // No space before and after indexer
+                this.NoSpaceBeforeOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19 /* OpenBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create3(20 /* CloseBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), 8 /* Delete */));
+                // Place a space before open brace in a function declaration
+                this.FunctionOpenBraceLeftTokenRange = formatting.Shared.TokenRange.AnyIncludingMultilineComments;
+                this.SpaceBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
+                // Place a space before open brace in a TypeScript declaration that has braces as children (class, module, enum, etc)
+                this.TypeScriptOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([69 /* Identifier */, 3 /* MultiLineCommentTrivia */, 73 /* ClassKeyword */]);
+                this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
+                // Place a space before open brace in a control flow construct
+                this.ControlOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 3 /* MultiLineCommentTrivia */, 79 /* DoKeyword */, 100 /* TryKeyword */, 85 /* FinallyKeyword */, 80 /* ElseKeyword */]);
+                this.SpaceBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
+                // Insert a space after { and before } in single-line contexts, but remove space from empty object literals {}.
+                this.SpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2 /* Space */));
+                this.SpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2 /* Space */));
+                this.NoSpaceBetweenEmptyBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15 /* OpenBraceToken */, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), 8 /* Delete */));
+                // Insert new line after { and before } in multi-line contexts.
+                this.NewLineAfterOpenBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
+                // For functions and control block place } on a new line    [multi-line rule]
+                this.NewLineBeforeCloseBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyIncludingMultilineComments, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
+                // Special handling of unary operators.
+                // Prefix operators generally shouldn't have a space between
+                // them and their target unary expression.
+                this.NoSpaceAfterUnaryPrefixOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.UnaryPrefixOperators, formatting.Shared.TokenRange.UnaryPrefixExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                this.NoSpaceAfterUnaryPreincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(41 /* PlusPlusToken */, formatting.Shared.TokenRange.UnaryPreincrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterUnaryPredecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(42 /* MinusMinusToken */, formatting.Shared.TokenRange.UnaryPredecrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeUnaryPostincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostincrementExpressions, 41 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeUnaryPostdecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostdecrementExpressions, 42 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // More unary operator special-casing.
+                // DevDiv 181814:  Be careful when removing leading whitespace
+                // around unary operators.  Examples:
+                //      1 - -2  --X-->  1--2
+                //      a + ++b --X-->  a+++b
+                this.SpaceAfterPostincrementWhenFollowedByAdd = new formatting.Rule(formatting.RuleDescriptor.create1(41 /* PlusPlusToken */, 35 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterAddWhenFollowedByUnaryPlus = new formatting.Rule(formatting.RuleDescriptor.create1(35 /* PlusToken */, 35 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterAddWhenFollowedByPreincrement = new formatting.Rule(formatting.RuleDescriptor.create1(35 /* PlusToken */, 41 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterPostdecrementWhenFollowedBySubtract = new formatting.Rule(formatting.RuleDescriptor.create1(42 /* MinusMinusToken */, 36 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterSubtractWhenFollowedByUnaryMinus = new formatting.Rule(formatting.RuleDescriptor.create1(36 /* MinusToken */, 36 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterSubtractWhenFollowedByPredecrement = new formatting.Rule(formatting.RuleDescriptor.create1(36 /* MinusToken */, 42 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.NoSpaceBeforeComma = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 24 /* CommaToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterCertainKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([102 /* VarKeyword */, 98 /* ThrowKeyword */, 92 /* NewKeyword */, 78 /* DeleteKeyword */, 94 /* ReturnKeyword */, 101 /* TypeOfKeyword */, 119 /* AwaitKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceAfterLetConstInVariableDeclaration = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([108 /* LetKeyword */, 74 /* ConstKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), 2 /* Space */));
+                this.NoSpaceBeforeOpenParenInFuncCall = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), 8 /* Delete */));
+                this.SpaceAfterFunctionInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create3(87 /* FunctionKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
+                this.NoSpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 8 /* Delete */));
+                this.SpaceAfterVoidOperator = new formatting.Rule(formatting.RuleDescriptor.create3(103 /* VoidKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), 2 /* Space */));
+                this.NoSpaceBetweenReturnAndSemicolon = new formatting.Rule(formatting.RuleDescriptor.create1(94 /* ReturnKeyword */, 23 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Add a space between statements. All keywords except (do,else,case) has open/close parens after them.
+                // So, we have a rule to add a space for [),Any], [do,Any], [else,Any], and [case,Any]
+                this.SpaceBetweenStatements = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 79 /* DoKeyword */, 80 /* ElseKeyword */, 71 /* CaseKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotForContext), 2 /* Space */));
+                // This low-pri rule takes care of "try {" and "finally {" in case the rule SpaceBeforeOpenBraceInControl didn't execute on FormatOnEnter.
+                this.SpaceAfterTryFinally = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([100 /* TryKeyword */, 85 /* FinallyKeyword */]), 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                //      get x() {}
+                //      set x(val) {}
+                this.SpaceAfterGetSetInMember = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([123 /* GetKeyword */, 131 /* SetKeyword */]), 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
+                // Special case for binary operators (that are keywords). For these we have to add a space and shouldn't follow any user options.
+                this.SpaceBeforeBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryKeywordOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryKeywordOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                // TypeScript-specific higher priority rules
+                // Treat constructor as an identifier in a function declaration, and remove spaces between constructor and following left parentheses
+                this.NoSpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(121 /* ConstructorKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Use of module as a function call. e.g.: import m2 = module("m2");
+                this.NoSpaceAfterModuleImport = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([125 /* ModuleKeyword */, 129 /* RequireKeyword */]), 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Add a space around certain TypeScript keywords
+                this.SpaceAfterCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([115 /* AbstractKeyword */, 73 /* ClassKeyword */, 122 /* DeclareKeyword */, 77 /* DefaultKeyword */, 81 /* EnumKeyword */, 82 /* ExportKeyword */, 83 /* ExtendsKeyword */, 123 /* GetKeyword */, 106 /* ImplementsKeyword */, 89 /* ImportKeyword */, 107 /* InterfaceKeyword */, 125 /* ModuleKeyword */, 126 /* NamespaceKeyword */, 110 /* PrivateKeyword */, 112 /* PublicKeyword */, 111 /* ProtectedKeyword */, 131 /* SetKeyword */, 113 /* StaticKeyword */, 134 /* TypeKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([83 /* ExtendsKeyword */, 106 /* ImplementsKeyword */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Treat string literals in module names as identifiers, and add a space between the literal and the opening Brace braces, e.g.: module "m2" {
+                this.SpaceAfterModuleName = new formatting.Rule(formatting.RuleDescriptor.create1(9 /* StringLiteral */, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsModuleDeclContext), 2 /* Space */));
+                // Lambda expressions
+                this.SpaceBeforeArrow = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 34 /* EqualsGreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceAfterArrow = new formatting.Rule(formatting.RuleDescriptor.create3(34 /* EqualsGreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Optional parameters and let args
+                this.NoSpaceAfterEllipsis = new formatting.Rule(formatting.RuleDescriptor.create1(22 /* DotDotDotToken */, 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterOptionalParameters = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 24 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                // generics and type assertions
+                this.NoSpaceBeforeOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.TypeNames, 25 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceBetweenCloseParenAndAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create1(18 /* CloseParenToken */, 25 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceAfterOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(25 /* LessThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 27 /* GreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceAfterCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.FromTokens([17 /* OpenParenToken */, 19 /* OpenBracketToken */, 27 /* GreaterThanToken */, 24 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 8 /* Delete */));
+                // Remove spaces in empty interface literals. e.g.: x: {}
+                this.NoSpaceBetweenEmptyInterfaceBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15 /* OpenBraceToken */, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectTypeContext), 8 /* Delete */));
+                // decorators
+                this.SpaceBeforeAt = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 55 /* AtToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceAfterAt = new formatting.Rule(formatting.RuleDescriptor.create3(55 /* AtToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterDecorator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([115 /* AbstractKeyword */, 69 /* Identifier */, 82 /* ExportKeyword */, 77 /* DefaultKeyword */, 73 /* ClassKeyword */, 113 /* StaticKeyword */, 112 /* PublicKeyword */, 110 /* PrivateKeyword */, 111 /* ProtectedKeyword */, 123 /* GetKeyword */, 131 /* SetKeyword */, 19 /* OpenBracketToken */, 37 /* AsteriskToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsEndOfDecoratorContextOnSameLine), 2 /* Space */));
+                this.NoSpaceBetweenFunctionKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 37 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 8 /* Delete */));
+                this.SpaceAfterStarInGeneratorDeclaration = new formatting.Rule(formatting.RuleDescriptor.create3(37 /* AsteriskToken */, formatting.Shared.TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 2 /* Space */));
+                this.NoSpaceBetweenYieldKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(114 /* YieldKeyword */, 37 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 8 /* Delete */));
+                this.SpaceBetweenYieldOrYieldStarAndOperand = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([114 /* YieldKeyword */, 37 /* AsteriskToken */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 2 /* Space */));
+                // Async-await
+                this.SpaceBetweenAsyncAndOpenParen = new formatting.Rule(formatting.RuleDescriptor.create1(118 /* AsyncKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsArrowFunctionContext, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBetweenAsyncAndFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(118 /* AsyncKeyword */, 87 /* FunctionKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // template string
+                this.NoSpaceBetweenTagAndTemplateString = new formatting.Rule(formatting.RuleDescriptor.create3(69 /* Identifier */, formatting.Shared.TokenRange.FromTokens([11 /* NoSubstitutionTemplateLiteral */, 12 /* TemplateHead */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // These rules are higher in priority than user-configurable rules.
+                this.HighPriorityCommonRules = [
+                    this.IgnoreBeforeComment, this.IgnoreAfterLineComment,
+                    this.NoSpaceBeforeColon, this.SpaceAfterColon, this.NoSpaceBeforeQuestionMark, this.SpaceAfterQuestionMarkInConditionalOperator,
+                    this.NoSpaceAfterQuestionMark,
+                    this.NoSpaceBeforeDot, this.NoSpaceAfterDot,
+                    this.NoSpaceAfterUnaryPrefixOperator,
+                    this.NoSpaceAfterUnaryPreincrementOperator, this.NoSpaceAfterUnaryPredecrementOperator,
+                    this.NoSpaceBeforeUnaryPostincrementOperator, this.NoSpaceBeforeUnaryPostdecrementOperator,
+                    this.SpaceAfterPostincrementWhenFollowedByAdd,
+                    this.SpaceAfterAddWhenFollowedByUnaryPlus, this.SpaceAfterAddWhenFollowedByPreincrement,
+                    this.SpaceAfterPostdecrementWhenFollowedBySubtract,
+                    this.SpaceAfterSubtractWhenFollowedByUnaryMinus, this.SpaceAfterSubtractWhenFollowedByPredecrement,
+                    this.NoSpaceAfterCloseBrace,
+                    this.SpaceAfterOpenBrace, this.SpaceBeforeCloseBrace, this.NewLineBeforeCloseBraceInBlockContext,
+                    this.SpaceAfterCloseBrace, this.SpaceBetweenCloseBraceAndElse, this.SpaceBetweenCloseBraceAndWhile, this.NoSpaceBetweenEmptyBraceBrackets,
+                    this.NoSpaceBetweenFunctionKeywordAndStar, this.SpaceAfterStarInGeneratorDeclaration,
+                    this.SpaceAfterFunctionInFuncDecl, this.NewLineAfterOpenBraceInBlockContext, this.SpaceAfterGetSetInMember,
+                    this.NoSpaceBetweenYieldKeywordAndStar, this.SpaceBetweenYieldOrYieldStarAndOperand,
+                    this.NoSpaceBetweenReturnAndSemicolon,
+                    this.SpaceAfterCertainKeywords,
+                    this.SpaceAfterLetConstInVariableDeclaration,
+                    this.NoSpaceBeforeOpenParenInFuncCall,
+                    this.SpaceBeforeBinaryKeywordOperator, this.SpaceAfterBinaryKeywordOperator,
+                    this.SpaceAfterVoidOperator,
+                    this.SpaceBetweenAsyncAndOpenParen, this.SpaceBetweenAsyncAndFunctionKeyword,
+                    this.NoSpaceBetweenTagAndTemplateString,
+                    // TypeScript-specific rules
+                    this.NoSpaceAfterConstructor, this.NoSpaceAfterModuleImport,
+                    this.SpaceAfterCertainTypeScriptKeywords, this.SpaceBeforeCertainTypeScriptKeywords,
+                    this.SpaceAfterModuleName,
+                    this.SpaceBeforeArrow, this.SpaceAfterArrow,
+                    this.NoSpaceAfterEllipsis,
+                    this.NoSpaceAfterOptionalParameters,
+                    this.NoSpaceBetweenEmptyInterfaceBraceBrackets,
+                    this.NoSpaceBeforeOpenAngularBracket,
+                    this.NoSpaceBetweenCloseParenAndAngularBracket,
+                    this.NoSpaceAfterOpenAngularBracket,
+                    this.NoSpaceBeforeCloseAngularBracket,
+                    this.NoSpaceAfterCloseAngularBracket,
+                    this.NoSpaceAfterTypeAssertion,
+                    this.SpaceBeforeAt,
+                    this.NoSpaceAfterAt,
+                    this.SpaceAfterDecorator,
+                ];
+                // These rules are lower in priority than user-configurable rules.
+                this.LowPriorityCommonRules = [
+                    this.NoSpaceBeforeSemicolon,
+                    this.SpaceBeforeOpenBraceInControl, this.SpaceBeforeOpenBraceInFunction, this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock,
+                    this.NoSpaceBeforeComma,
+                    this.NoSpaceBeforeOpenBracket,
+                    this.NoSpaceAfterCloseBracket,
+                    this.SpaceAfterSemicolon,
+                    this.NoSpaceBeforeOpenParenInFuncDecl,
+                    this.SpaceBetweenStatements, this.SpaceAfterTryFinally
+                ];
+                ///
+                /// Rules controlled by user options
+                ///
+                // Insert space after comma delimiter
+                this.SpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNextTokenNotCloseBracket), 2 /* Space */));
+                this.NoSpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Insert space before and after binary operators
+                this.SpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.NoSpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
+                this.NoSpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
+                // Insert space after keywords in control flow statements
+                this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 2 /* Space */));
+                this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 8 /* Delete */));
+                // Open Brace braces after function
+                // TypeScript: Function can have return types, which can be made of tons of different token kinds
+                this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
+                // Open Brace braces after TypeScript module/class/interface
+                this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
+                // Open Brace braces after control block
+                this.NewLineBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
+                // Insert space after semicolon in for statement
+                this.SpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 2 /* Space */));
+                this.NoSpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 8 /* Delete */));
+                // Insert space after opening and before closing nonempty parenthesis
+                this.SpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBetweenParens = new formatting.Rule(formatting.RuleDescriptor.create1(17 /* OpenParenToken */, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Insert space after opening and before closing nonempty brackets
+                this.SpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBetweenBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(19 /* OpenBracketToken */, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Insert space after opening and before closing template string braces
+                this.NoSpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12 /* TemplateHead */, 13 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12 /* TemplateHead */, 13 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13 /* TemplateMiddle */, 14 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13 /* TemplateMiddle */, 14 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Insert space after function keyword for anonymous functions
+                this.SpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
+                this.NoSpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 8 /* Delete */));
+            }
+            Rules.prototype.getRuleName = function (rule) {
+                var o = this;
+                for (var name_39 in o) {
+                    if (o[name_39] === rule) {
+                        return name_39;
+                    }
+                }
+                throw new Error("Unknown rule");
+            };
+            ///
+            /// Contexts
+            ///
+            Rules.IsForContext = function (context) {
+                return context.contextNode.kind === 206 /* ForStatement */;
+            };
+            Rules.IsNotForContext = function (context) {
+                return !Rules.IsForContext(context);
+            };
+            Rules.IsBinaryOpContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 187 /* BinaryExpression */:
+                    case 188 /* ConditionalExpression */:
+                    case 195 /* AsExpression */:
+                    case 154 /* TypePredicate */:
+                    case 162 /* UnionType */:
+                    case 163 /* IntersectionType */:
+                        return true;
+                    // equals in binding elements: function foo([[x, y] = [1, 2]])
+                    case 169 /* BindingElement */:
+                    // equals in type X = ...
+                    case 223 /* TypeAliasDeclaration */:
+                    // equal in import a = module('a');
+                    case 229 /* ImportEqualsDeclaration */:
+                    // equal in let a = 0;
+                    case 218 /* VariableDeclaration */:
+                    // equal in p = 0;
+                    case 142 /* Parameter */:
+                    case 255 /* EnumMember */:
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                        return context.currentTokenSpan.kind === 56 /* EqualsToken */ || context.nextTokenSpan.kind === 56 /* EqualsToken */;
+                    // "in" keyword in for (let x in []) { }
+                    case 207 /* ForInStatement */:
+                        return context.currentTokenSpan.kind === 90 /* InKeyword */ || context.nextTokenSpan.kind === 90 /* InKeyword */;
+                    // Technically, "of" is not a binary operator, but format it the same way as "in"
+                    case 208 /* ForOfStatement */:
+                        return context.currentTokenSpan.kind === 138 /* OfKeyword */ || context.nextTokenSpan.kind === 138 /* OfKeyword */;
+                }
+                return false;
+            };
+            Rules.IsNotBinaryOpContext = function (context) {
+                return !Rules.IsBinaryOpContext(context);
+            };
+            Rules.IsConditionalOperatorContext = function (context) {
+                return context.contextNode.kind === 188 /* ConditionalExpression */;
+            };
+            Rules.IsSameLineTokenOrBeforeMultilineBlockContext = function (context) {
+                //// This check is mainly used inside SpaceBeforeOpenBraceInControl and SpaceBeforeOpenBraceInFunction.
+                ////
+                //// Ex:
+                //// if (1)     { ....
+                ////      * ) and { are on the same line so apply the rule. Here we don't care whether it's same or multi block context
+                ////
+                //// Ex:
+                //// if (1)
+                //// { ... }
+                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we don't format.
+                ////
+                //// Ex:
+                //// if (1)
+                //// { ...
+                //// }
+                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we format.
+                return context.TokensAreOnSameLine() || Rules.IsBeforeMultilineBlockContext(context);
+            };
+            // This check is done before an open brace in a control construct, a function, or a typescript block declaration
+            Rules.IsBeforeMultilineBlockContext = function (context) {
+                return Rules.IsBeforeBlockContext(context) && !(context.NextNodeAllOnSameLine() || context.NextNodeBlockIsOnOneLine());
+            };
+            Rules.IsMultilineBlockContext = function (context) {
+                return Rules.IsBlockContext(context) && !(context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
+            };
+            Rules.IsSingleLineBlockContext = function (context) {
+                return Rules.IsBlockContext(context) && (context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
+            };
+            Rules.IsBlockContext = function (context) {
+                return Rules.NodeIsBlockContext(context.contextNode);
+            };
+            Rules.IsBeforeBlockContext = function (context) {
+                return Rules.NodeIsBlockContext(context.nextTokenParent);
+            };
+            // IMPORTANT!!! This method must return true ONLY for nodes with open and close braces as immediate children
+            Rules.NodeIsBlockContext = function (node) {
+                if (Rules.NodeIsTypeScriptDeclWithBlockContext(node)) {
+                    // This means we are in a context that looks like a block to the user, but in the grammar is actually not a node (it's a class, module, enum, object type literal, etc).
+                    return true;
+                }
+                switch (node.kind) {
+                    case 199 /* Block */:
+                    case 227 /* CaseBlock */:
+                    case 171 /* ObjectLiteralExpression */:
+                    case 226 /* ModuleBlock */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsFunctionDeclContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 220 /* FunctionDeclaration */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    // case SyntaxKind.MemberFunctionDeclaration:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    // case SyntaxKind.MethodSignature:
+                    case 151 /* CallSignature */:
+                    case 179 /* FunctionExpression */:
+                    case 148 /* Constructor */:
+                    case 180 /* ArrowFunction */:
+                    // case SyntaxKind.ConstructorDeclaration:
+                    // case SyntaxKind.SimpleArrowFunctionExpression:
+                    // case SyntaxKind.ParenthesizedArrowFunctionExpression:
+                    case 222 /* InterfaceDeclaration */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsFunctionDeclarationOrFunctionExpressionContext = function (context) {
+                return context.contextNode.kind === 220 /* FunctionDeclaration */ || context.contextNode.kind === 179 /* FunctionExpression */;
+            };
+            Rules.IsTypeScriptDeclWithBlockContext = function (context) {
+                return Rules.NodeIsTypeScriptDeclWithBlockContext(context.contextNode);
+            };
+            Rules.NodeIsTypeScriptDeclWithBlockContext = function (node) {
+                switch (node.kind) {
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 159 /* TypeLiteral */:
+                    case 225 /* ModuleDeclaration */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsAfterCodeBlockContext = function (context) {
+                switch (context.currentTokenParent.kind) {
+                    case 221 /* ClassDeclaration */:
+                    case 225 /* ModuleDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 199 /* Block */:
+                    case 252 /* CatchClause */:
+                    case 226 /* ModuleBlock */:
+                    case 213 /* SwitchStatement */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsControlDeclContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 203 /* IfStatement */:
+                    case 213 /* SwitchStatement */:
+                    case 206 /* ForStatement */:
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                    case 205 /* WhileStatement */:
+                    case 216 /* TryStatement */:
+                    case 204 /* DoStatement */:
+                    case 212 /* WithStatement */:
+                    // TODO
+                    // case SyntaxKind.ElseClause:
+                    case 252 /* CatchClause */:
+                        return true;
+                    default:
+                        return false;
+                }
+            };
+            Rules.IsObjectContext = function (context) {
+                return context.contextNode.kind === 171 /* ObjectLiteralExpression */;
+            };
+            Rules.IsFunctionCallContext = function (context) {
+                return context.contextNode.kind === 174 /* CallExpression */;
+            };
+            Rules.IsNewContext = function (context) {
+                return context.contextNode.kind === 175 /* NewExpression */;
+            };
+            Rules.IsFunctionCallOrNewContext = function (context) {
+                return Rules.IsFunctionCallContext(context) || Rules.IsNewContext(context);
+            };
+            Rules.IsPreviousTokenNotComma = function (context) {
+                return context.currentTokenSpan.kind !== 24 /* CommaToken */;
+            };
+            Rules.IsNextTokenNotCloseBracket = function (context) {
+                return context.nextTokenSpan.kind !== 20 /* CloseBracketToken */;
+            };
+            Rules.IsArrowFunctionContext = function (context) {
+                return context.contextNode.kind === 180 /* ArrowFunction */;
+            };
+            Rules.IsNonJsxSameLineTokenContext = function (context) {
+                return context.TokensAreOnSameLine() && context.contextNode.kind !== 244 /* JsxText */;
+            };
+            Rules.IsNotBeforeBlockInFunctionDeclarationContext = function (context) {
+                return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context);
+            };
+            Rules.IsEndOfDecoratorContextOnSameLine = function (context) {
+                return context.TokensAreOnSameLine() &&
+                    context.contextNode.decorators &&
+                    Rules.NodeIsInDecoratorContext(context.currentTokenParent) &&
+                    !Rules.NodeIsInDecoratorContext(context.nextTokenParent);
+            };
+            Rules.NodeIsInDecoratorContext = function (node) {
+                while (ts.isExpression(node)) {
+                    node = node.parent;
+                }
+                return node.kind === 143 /* Decorator */;
+            };
+            Rules.IsStartOfVariableDeclarationList = function (context) {
+                return context.currentTokenParent.kind === 219 /* VariableDeclarationList */ &&
+                    context.currentTokenParent.getStart(context.sourceFile) === context.currentTokenSpan.pos;
+            };
+            Rules.IsNotFormatOnEnter = function (context) {
+                return context.formattingRequestKind !== 2 /* FormatOnEnter */;
+            };
+            Rules.IsModuleDeclContext = function (context) {
+                return context.contextNode.kind === 225 /* ModuleDeclaration */;
+            };
+            Rules.IsObjectTypeContext = function (context) {
+                return context.contextNode.kind === 159 /* TypeLiteral */; // && context.contextNode.parent.kind !== SyntaxKind.InterfaceDeclaration;
+            };
+            Rules.IsTypeArgumentOrParameterOrAssertion = function (token, parent) {
+                if (token.kind !== 25 /* LessThanToken */ && token.kind !== 27 /* GreaterThanToken */) {
+                    return false;
+                }
+                switch (parent.kind) {
+                    case 155 /* TypeReference */:
+                    case 177 /* TypeAssertionExpression */:
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 220 /* FunctionDeclaration */:
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 151 /* CallSignature */:
+                    case 152 /* ConstructSignature */:
+                    case 174 /* CallExpression */:
+                    case 175 /* NewExpression */:
+                    case 194 /* ExpressionWithTypeArguments */:
+                        return true;
+                    default:
+                        return false;
+                }
+            };
+            Rules.IsTypeArgumentOrParameterOrAssertionContext = function (context) {
+                return Rules.IsTypeArgumentOrParameterOrAssertion(context.currentTokenSpan, context.currentTokenParent) ||
+                    Rules.IsTypeArgumentOrParameterOrAssertion(context.nextTokenSpan, context.nextTokenParent);
+            };
+            Rules.IsTypeAssertionContext = function (context) {
+                return context.contextNode.kind === 177 /* TypeAssertionExpression */;
+            };
+            Rules.IsVoidOpContext = function (context) {
+                return context.currentTokenSpan.kind === 103 /* VoidKeyword */ && context.currentTokenParent.kind === 183 /* VoidExpression */;
+            };
+            Rules.IsYieldOrYieldStarWithOperand = function (context) {
+                return context.contextNode.kind === 190 /* YieldExpression */ && context.contextNode.expression !== undefined;
+            };
+            return Rules;
+        }());
+        formatting.Rules = Rules;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RulesMap = (function () {
+            function RulesMap() {
+                this.map = [];
+                this.mapRowLength = 0;
+            }
+            RulesMap.create = function (rules) {
+                var result = new RulesMap();
+                result.Initialize(rules);
+                return result;
+            };
+            RulesMap.prototype.Initialize = function (rules) {
+                this.mapRowLength = 138 /* LastToken */ + 1;
+                this.map = new Array(this.mapRowLength * this.mapRowLength); // new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
+                // This array is used only during construction of the rulesbucket in the map
+                var rulesBucketConstructionStateList = new Array(this.map.length); // new Array<RulesBucketConstructionState>(this.map.length);
+                this.FillRules(rules, rulesBucketConstructionStateList);
+                return this.map;
+            };
+            RulesMap.prototype.FillRules = function (rules, rulesBucketConstructionStateList) {
+                var _this = this;
+                rules.forEach(function (rule) {
+                    _this.FillRule(rule, rulesBucketConstructionStateList);
+                });
+            };
+            RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
+                var rulesBucketIndex = (row * this.mapRowLength) + column;
+                // Debug.Assert(rulesBucketIndex < this.map.Length, "Trying to access an index outside the array.");
+                return rulesBucketIndex;
+            };
+            RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
+                var _this = this;
+                var specificRule = rule.Descriptor.LeftTokenRange !== formatting.Shared.TokenRange.Any &&
+                    rule.Descriptor.RightTokenRange !== formatting.Shared.TokenRange.Any;
+                rule.Descriptor.LeftTokenRange.GetTokens().forEach(function (left) {
+                    rule.Descriptor.RightTokenRange.GetTokens().forEach(function (right) {
+                        var rulesBucketIndex = _this.GetRuleBucketIndex(left, right);
+                        var rulesBucket = _this.map[rulesBucketIndex];
+                        if (rulesBucket === undefined) {
+                            rulesBucket = _this.map[rulesBucketIndex] = new RulesBucket();
+                        }
+                        rulesBucket.AddRule(rule, specificRule, rulesBucketConstructionStateList, rulesBucketIndex);
+                    });
+                });
+            };
+            RulesMap.prototype.GetRule = function (context) {
+                var bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
+                var bucket = this.map[bucketIndex];
+                if (bucket) {
+                    for (var _i = 0, _a = bucket.Rules(); _i < _a.length; _i++) {
+                        var rule = _a[_i];
+                        if (rule.Operation.Context.InContext(context)) {
+                            return rule;
+                        }
+                    }
+                }
+                return undefined;
+            };
+            return RulesMap;
+        }());
+        formatting.RulesMap = RulesMap;
+        var MaskBitSize = 5;
+        var Mask = 0x1f;
+        (function (RulesPosition) {
+            RulesPosition[RulesPosition["IgnoreRulesSpecific"] = 0] = "IgnoreRulesSpecific";
+            RulesPosition[RulesPosition["IgnoreRulesAny"] = MaskBitSize * 1] = "IgnoreRulesAny";
+            RulesPosition[RulesPosition["ContextRulesSpecific"] = MaskBitSize * 2] = "ContextRulesSpecific";
+            RulesPosition[RulesPosition["ContextRulesAny"] = MaskBitSize * 3] = "ContextRulesAny";
+            RulesPosition[RulesPosition["NoContextRulesSpecific"] = MaskBitSize * 4] = "NoContextRulesSpecific";
+            RulesPosition[RulesPosition["NoContextRulesAny"] = MaskBitSize * 5] = "NoContextRulesAny";
+        })(formatting.RulesPosition || (formatting.RulesPosition = {}));
+        var RulesPosition = formatting.RulesPosition;
+        var RulesBucketConstructionState = (function () {
+            function RulesBucketConstructionState() {
+                //// The Rules list contains all the inserted rules into a rulebucket in the following order:
+                ////    1- Ignore rules with specific token combination
+                ////    2- Ignore rules with any token combination
+                ////    3- Context rules with specific token combination
+                ////    4- Context rules with any token combination
+                ////    5- Non-context rules with specific token combination
+                ////    6- Non-context rules with any token combination
+                ////
+                //// The member rulesInsertionIndexBitmap is used to describe the number of rules
+                //// in each sub-bucket (above) hence can be used to know the index of where to insert
+                //// the next rule. It's a bitmap which contains 6 different sections each is given 5 bits.
+                ////
+                //// Example:
+                //// In order to insert a rule to the end of sub-bucket (3), we get the index by adding
+                //// the values in the bitmap segments 3rd, 2nd, and 1st.
+                this.rulesInsertionIndexBitmap = 0;
+            }
+            RulesBucketConstructionState.prototype.GetInsertionIndex = function (maskPosition) {
+                var index = 0;
+                var pos = 0;
+                var indexBitmap = this.rulesInsertionIndexBitmap;
+                while (pos <= maskPosition) {
+                    index += (indexBitmap & Mask);
+                    indexBitmap >>= MaskBitSize;
+                    pos += MaskBitSize;
+                }
+                return index;
+            };
+            RulesBucketConstructionState.prototype.IncreaseInsertionIndex = function (maskPosition) {
+                var value = (this.rulesInsertionIndexBitmap >> maskPosition) & Mask;
+                value++;
+                ts.Debug.assert((value & Mask) === value, "Adding more rules into the sub-bucket than allowed. Maximum allowed is 32 rules.");
+                var temp = this.rulesInsertionIndexBitmap & ~(Mask << maskPosition);
+                temp |= value << maskPosition;
+                this.rulesInsertionIndexBitmap = temp;
+            };
+            return RulesBucketConstructionState;
+        }());
+        formatting.RulesBucketConstructionState = RulesBucketConstructionState;
+        var RulesBucket = (function () {
+            function RulesBucket() {
+                this.rules = [];
+            }
+            RulesBucket.prototype.Rules = function () {
+                return this.rules;
+            };
+            RulesBucket.prototype.AddRule = function (rule, specificTokens, constructionState, rulesBucketIndex) {
+                var position;
+                if (rule.Operation.Action === 1 /* Ignore */) {
+                    position = specificTokens ?
+                        RulesPosition.IgnoreRulesSpecific :
+                        RulesPosition.IgnoreRulesAny;
+                }
+                else if (!rule.Operation.Context.IsAny()) {
+                    position = specificTokens ?
+                        RulesPosition.ContextRulesSpecific :
+                        RulesPosition.ContextRulesAny;
+                }
+                else {
+                    position = specificTokens ?
+                        RulesPosition.NoContextRulesSpecific :
+                        RulesPosition.NoContextRulesAny;
+                }
+                var state = constructionState[rulesBucketIndex];
+                if (state === undefined) {
+                    state = constructionState[rulesBucketIndex] = new RulesBucketConstructionState();
+                }
+                var index = state.GetInsertionIndex(position);
+                this.rules.splice(index, 0, rule);
+                state.IncreaseInsertionIndex(position);
+            };
+            return RulesBucket;
+        }());
+        formatting.RulesBucket = RulesBucket;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Shared;
+        (function (Shared) {
+            var TokenRangeAccess = (function () {
+                function TokenRangeAccess(from, to, except) {
+                    this.tokens = [];
+                    for (var token = from; token <= to; token++) {
+                        if (ts.indexOf(except, token) < 0) {
+                            this.tokens.push(token);
+                        }
+                    }
+                }
+                TokenRangeAccess.prototype.GetTokens = function () {
+                    return this.tokens;
+                };
+                TokenRangeAccess.prototype.Contains = function (token) {
+                    return this.tokens.indexOf(token) >= 0;
+                };
+                return TokenRangeAccess;
+            }());
+            Shared.TokenRangeAccess = TokenRangeAccess;
+            var TokenValuesAccess = (function () {
+                function TokenValuesAccess(tks) {
+                    this.tokens = tks && tks.length ? tks : [];
+                }
+                TokenValuesAccess.prototype.GetTokens = function () {
+                    return this.tokens;
+                };
+                TokenValuesAccess.prototype.Contains = function (token) {
+                    return this.tokens.indexOf(token) >= 0;
+                };
+                return TokenValuesAccess;
+            }());
+            Shared.TokenValuesAccess = TokenValuesAccess;
+            var TokenSingleValueAccess = (function () {
+                function TokenSingleValueAccess(token) {
+                    this.token = token;
+                }
+                TokenSingleValueAccess.prototype.GetTokens = function () {
+                    return [this.token];
+                };
+                TokenSingleValueAccess.prototype.Contains = function (tokenValue) {
+                    return tokenValue === this.token;
+                };
+                return TokenSingleValueAccess;
+            }());
+            Shared.TokenSingleValueAccess = TokenSingleValueAccess;
+            var TokenAllAccess = (function () {
+                function TokenAllAccess() {
+                }
+                TokenAllAccess.prototype.GetTokens = function () {
+                    var result = [];
+                    for (var token = 0 /* FirstToken */; token <= 138 /* LastToken */; token++) {
+                        result.push(token);
+                    }
+                    return result;
+                };
+                TokenAllAccess.prototype.Contains = function (tokenValue) {
+                    return true;
+                };
+                TokenAllAccess.prototype.toString = function () {
+                    return "[allTokens]";
+                };
+                return TokenAllAccess;
+            }());
+            Shared.TokenAllAccess = TokenAllAccess;
+            var TokenRange = (function () {
+                function TokenRange(tokenAccess) {
+                    this.tokenAccess = tokenAccess;
+                }
+                TokenRange.FromToken = function (token) {
+                    return new TokenRange(new TokenSingleValueAccess(token));
+                };
+                TokenRange.FromTokens = function (tokens) {
+                    return new TokenRange(new TokenValuesAccess(tokens));
+                };
+                TokenRange.FromRange = function (f, to, except) {
+                    if (except === void 0) { except = []; }
+                    return new TokenRange(new TokenRangeAccess(f, to, except));
+                };
+                TokenRange.AllTokens = function () {
+                    return new TokenRange(new TokenAllAccess());
+                };
+                TokenRange.prototype.GetTokens = function () {
+                    return this.tokenAccess.GetTokens();
+                };
+                TokenRange.prototype.Contains = function (token) {
+                    return this.tokenAccess.Contains(token);
+                };
+                TokenRange.prototype.toString = function () {
+                    return this.tokenAccess.toString();
+                };
+                TokenRange.Any = TokenRange.AllTokens();
+                TokenRange.AnyIncludingMultilineComments = TokenRange.FromTokens(TokenRange.Any.GetTokens().concat([3 /* MultiLineCommentTrivia */]));
+                TokenRange.Keywords = TokenRange.FromRange(70 /* FirstKeyword */, 138 /* LastKeyword */);
+                TokenRange.BinaryOperators = TokenRange.FromRange(25 /* FirstBinaryOperator */, 68 /* LastBinaryOperator */);
+                TokenRange.BinaryKeywordOperators = TokenRange.FromTokens([90 /* InKeyword */, 91 /* InstanceOfKeyword */, 138 /* OfKeyword */, 116 /* AsKeyword */, 124 /* IsKeyword */]);
+                TokenRange.UnaryPrefixOperators = TokenRange.FromTokens([41 /* PlusPlusToken */, 42 /* MinusMinusToken */, 50 /* TildeToken */, 49 /* ExclamationToken */]);
+                TokenRange.UnaryPrefixExpressions = TokenRange.FromTokens([8 /* NumericLiteral */, 69 /* Identifier */, 17 /* OpenParenToken */, 19 /* OpenBracketToken */, 15 /* OpenBraceToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
+                TokenRange.UnaryPreincrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
+                TokenRange.UnaryPostincrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 18 /* CloseParenToken */, 20 /* CloseBracketToken */, 92 /* NewKeyword */]);
+                TokenRange.UnaryPredecrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
+                TokenRange.UnaryPostdecrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 18 /* CloseParenToken */, 20 /* CloseBracketToken */, 92 /* NewKeyword */]);
+                TokenRange.Comments = TokenRange.FromTokens([2 /* SingleLineCommentTrivia */, 3 /* MultiLineCommentTrivia */]);
+                TokenRange.TypeNames = TokenRange.FromTokens([69 /* Identifier */, 130 /* NumberKeyword */, 132 /* StringKeyword */, 120 /* BooleanKeyword */, 133 /* SymbolKeyword */, 103 /* VoidKeyword */, 117 /* AnyKeyword */]);
+                return TokenRange;
+            }());
+            Shared.TokenRange = TokenRange;
+        })(Shared = formatting.Shared || (formatting.Shared = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='..\services.ts' />
+///<reference path='formattingContext.ts' />
+///<reference path='formattingRequestKind.ts' />
+///<reference path='rule.ts' />
+///<reference path='ruleAction.ts' />
+///<reference path='ruleDescriptor.ts' />
+///<reference path='ruleFlag.ts' />
+///<reference path='ruleOperation.ts' />
+///<reference path='ruleOperationContext.ts' />
+///<reference path='rules.ts' />
+///<reference path='rulesMap.ts' />
+///<reference path='tokenRange.ts' /> 
+/// <reference path="references.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RulesProvider = (function () {
+            function RulesProvider() {
+                this.globalRules = new formatting.Rules();
+            }
+            RulesProvider.prototype.getRuleName = function (rule) {
+                return this.globalRules.getRuleName(rule);
+            };
+            RulesProvider.prototype.getRuleByName = function (name) {
+                return this.globalRules[name];
+            };
+            RulesProvider.prototype.getRulesMap = function () {
+                return this.rulesMap;
+            };
+            RulesProvider.prototype.ensureUpToDate = function (options) {
+                if (!this.options || !ts.compareDataObjects(this.options, options)) {
+                    var activeRules = this.createActiveRules(options);
+                    var rulesMap = formatting.RulesMap.create(activeRules);
+                    this.activeRules = activeRules;
+                    this.rulesMap = rulesMap;
+                    this.options = ts.clone(options);
+                }
+            };
+            RulesProvider.prototype.createActiveRules = function (options) {
+                var rules = this.globalRules.HighPriorityCommonRules.slice(0);
+                if (options.InsertSpaceAfterCommaDelimiter) {
+                    rules.push(this.globalRules.SpaceAfterComma);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterComma);
+                }
+                if (options.InsertSpaceAfterFunctionKeywordForAnonymousFunctions) {
+                    rules.push(this.globalRules.SpaceAfterAnonymousFunctionKeyword);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterAnonymousFunctionKeyword);
+                }
+                if (options.InsertSpaceAfterKeywordsInControlFlowStatements) {
+                    rules.push(this.globalRules.SpaceAfterKeywordInControl);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterKeywordInControl);
+                }
+                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis) {
+                    rules.push(this.globalRules.SpaceAfterOpenParen);
+                    rules.push(this.globalRules.SpaceBeforeCloseParen);
+                    rules.push(this.globalRules.NoSpaceBetweenParens);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterOpenParen);
+                    rules.push(this.globalRules.NoSpaceBeforeCloseParen);
+                    rules.push(this.globalRules.NoSpaceBetweenParens);
+                }
+                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets) {
+                    rules.push(this.globalRules.SpaceAfterOpenBracket);
+                    rules.push(this.globalRules.SpaceBeforeCloseBracket);
+                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterOpenBracket);
+                    rules.push(this.globalRules.NoSpaceBeforeCloseBracket);
+                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
+                }
+                if (options.InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces) {
+                    rules.push(this.globalRules.SpaceAfterTemplateHeadAndMiddle);
+                    rules.push(this.globalRules.SpaceBeforeTemplateMiddleAndTail);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterTemplateHeadAndMiddle);
+                    rules.push(this.globalRules.NoSpaceBeforeTemplateMiddleAndTail);
+                }
+                if (options.InsertSpaceAfterSemicolonInForStatements) {
+                    rules.push(this.globalRules.SpaceAfterSemicolonInFor);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterSemicolonInFor);
+                }
+                if (options.InsertSpaceBeforeAndAfterBinaryOperators) {
+                    rules.push(this.globalRules.SpaceBeforeBinaryOperator);
+                    rules.push(this.globalRules.SpaceAfterBinaryOperator);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceBeforeBinaryOperator);
+                    rules.push(this.globalRules.NoSpaceAfterBinaryOperator);
+                }
+                if (options.PlaceOpenBraceOnNewLineForControlBlocks) {
+                    rules.push(this.globalRules.NewLineBeforeOpenBraceInControl);
+                }
+                if (options.PlaceOpenBraceOnNewLineForFunctions) {
+                    rules.push(this.globalRules.NewLineBeforeOpenBraceInFunction);
+                    rules.push(this.globalRules.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock);
+                }
+                rules = rules.concat(this.globalRules.LowPriorityCommonRules);
+                return rules;
+            };
+            return RulesProvider;
+        }());
+        formatting.RulesProvider = RulesProvider;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='..\services.ts' />
+///<reference path='formattingScanner.ts' />
+///<reference path='rulesProvider.ts' />
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Constants;
+        (function (Constants) {
+            Constants[Constants["Unknown"] = -1] = "Unknown";
+        })(Constants || (Constants = {}));
+        function formatOnEnter(position, sourceFile, rulesProvider, options) {
+            var line = sourceFile.getLineAndCharacterOfPosition(position).line;
+            if (line === 0) {
+                return [];
+            }
+            // After the enter key, the cursor is now at a new line. The new line may or may not contain non-whitespace characters.
+            // If the new line has only whitespaces, we won't want to format this line, because that would remove the indentation as
+            // trailing whitespaces. So the end of the formatting span should be the later one between:
+            //  1. the end of the previous line
+            //  2. the last non-whitespace character in the current line
+            var endOfFormatSpan = ts.getEndLinePosition(line, sourceFile);
+            while (ts.isWhiteSpace(sourceFile.text.charCodeAt(endOfFormatSpan)) && !ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+                endOfFormatSpan--;
+            }
+            // if the character at the end of the span is a line break, we shouldn't include it, because it indicates we don't want to
+            // touch the current line at all. Also, on some OSes the line break consists of two characters (\r\n), we should test if the
+            // previous character before the end of format span is line break character as well.
+            if (ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+                endOfFormatSpan--;
+            }
+            var span = {
+                // get start position for the previous line
+                pos: ts.getStartPositionOfLine(line - 1, sourceFile),
+                // end value is exclusive so add 1 to the result
+                end: endOfFormatSpan + 1
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 2 /* FormatOnEnter */);
+        }
+        formatting.formatOnEnter = formatOnEnter;
+        function formatOnSemicolon(position, sourceFile, rulesProvider, options) {
+            return formatOutermostParent(position, 23 /* SemicolonToken */, sourceFile, options, rulesProvider, 3 /* FormatOnSemicolon */);
+        }
+        formatting.formatOnSemicolon = formatOnSemicolon;
+        function formatOnClosingCurly(position, sourceFile, rulesProvider, options) {
+            return formatOutermostParent(position, 16 /* CloseBraceToken */, sourceFile, options, rulesProvider, 4 /* FormatOnClosingCurlyBrace */);
+        }
+        formatting.formatOnClosingCurly = formatOnClosingCurly;
+        function formatDocument(sourceFile, rulesProvider, options) {
+            var span = {
+                pos: 0,
+                end: sourceFile.text.length
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 0 /* FormatDocument */);
+        }
+        formatting.formatDocument = formatDocument;
+        function formatSelection(start, end, sourceFile, rulesProvider, options) {
+            // format from the beginning of the line
+            var span = {
+                pos: ts.getLineStartPositionForPosition(start, sourceFile),
+                end: end
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 1 /* FormatSelection */);
+        }
+        formatting.formatSelection = formatSelection;
+        function formatOutermostParent(position, expectedLastToken, sourceFile, options, rulesProvider, requestKind) {
+            var parent = findOutermostParent(position, expectedLastToken, sourceFile);
+            if (!parent) {
+                return [];
+            }
+            var span = {
+                pos: ts.getLineStartPositionForPosition(parent.getStart(sourceFile), sourceFile),
+                end: parent.end
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, requestKind);
+        }
+        function findOutermostParent(position, expectedTokenKind, sourceFile) {
+            var precedingToken = ts.findPrecedingToken(position, sourceFile);
+            // when it is claimed that trigger character was typed at given position
+            // we verify that there is a token with a matching kind whose end is equal to position (because the character was just typed).
+            // If this condition is not hold - then trigger character was typed in some other context,
+            // i.e.in comment and thus should not trigger autoformatting
+            if (!precedingToken ||
+                precedingToken.kind !== expectedTokenKind ||
+                position !== precedingToken.getEnd()) {
+                return undefined;
+            }
+            // walk up and search for the parent node that ends at the same position with precedingToken.
+            // for cases like this
+            //
+            // let x = 1;
+            // while (true) {
+            // }
+            // after typing close curly in while statement we want to reformat just the while statement.
+            // However if we just walk upwards searching for the parent that has the same end value -
+            // we'll end up with the whole source file. isListElement allows to stop on the list element level
+            var current = precedingToken;
+            while (current &&
+                current.parent &&
+                current.parent.end === precedingToken.end &&
+                !isListElement(current.parent, current)) {
+                current = current.parent;
+            }
+            return current;
+        }
+        // Returns true if node is a element in some list in parent
+        // i.e. parent is class declaration with the list of members and node is one of members.
+        function isListElement(parent, node) {
+            switch (parent.kind) {
+                case 221 /* ClassDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                    return ts.rangeContainsRange(parent.members, node);
+                case 225 /* ModuleDeclaration */:
+                    var body = parent.body;
+                    return body && body.kind === 199 /* Block */ && ts.rangeContainsRange(body.statements, node);
+                case 256 /* SourceFile */:
+                case 199 /* Block */:
+                case 226 /* ModuleBlock */:
+                    return ts.rangeContainsRange(parent.statements, node);
+                case 252 /* CatchClause */:
+                    return ts.rangeContainsRange(parent.block.statements, node);
+            }
+            return false;
+        }
+        /** find node that fully contains given text range */
+        function findEnclosingNode(range, sourceFile) {
+            return find(sourceFile);
+            function find(n) {
+                var candidate = ts.forEachChild(n, function (c) { return ts.startEndContainsRange(c.getStart(sourceFile), c.end, range) && c; });
+                if (candidate) {
+                    var result = find(candidate);
+                    if (result) {
+                        return result;
+                    }
+                }
+                return n;
+            }
+        }
+        /** formatting is not applied to ranges that contain parse errors.
+          * This function will return a predicate that for a given text range will tell
+          * if there are any parse errors that overlap with the range.
+          */
+        function prepareRangeContainsErrorFunction(errors, originalRange) {
+            if (!errors.length) {
+                return rangeHasNoErrors;
+            }
+            // pick only errors that fall in range
+            var sorted = errors
+                .filter(function (d) { return ts.rangeOverlapsWithStartEnd(originalRange, d.start, d.start + d.length); })
+                .sort(function (e1, e2) { return e1.start - e2.start; });
+            if (!sorted.length) {
+                return rangeHasNoErrors;
+            }
+            var index = 0;
+            return function (r) {
+                // in current implementation sequence of arguments [r1, r2...] is monotonically increasing.
+                // 'index' tracks the index of the most recent error that was checked.
+                while (true) {
+                    if (index >= sorted.length) {
+                        // all errors in the range were already checked -> no error in specified range
+                        return false;
+                    }
+                    var error = sorted[index];
+                    if (r.end <= error.start) {
+                        // specified range ends before the error refered by 'index' - no error in range
+                        return false;
+                    }
+                    if (ts.startEndOverlapsWithStartEnd(r.pos, r.end, error.start, error.start + error.length)) {
+                        // specified range overlaps with error range
+                        return true;
+                    }
+                    index++;
+                }
+            };
+            function rangeHasNoErrors(r) {
+                return false;
+            }
+        }
+        /**
+          * Start of the original range might fall inside the comment - scanner will not yield appropriate results
+          * This function will look for token that is located before the start of target range
+          * and return its end as start position for the scanner.
+          */
+        function getScanStartPosition(enclosingNode, originalRange, sourceFile) {
+            var start = enclosingNode.getStart(sourceFile);
+            if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
+                return start;
+            }
+            var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile);
+            if (!precedingToken) {
+                // no preceding token found - start from the beginning of enclosing node
+                return enclosingNode.pos;
+            }
+            // preceding token ends after the start of original range (i.e when originalRange.pos falls in the middle of literal)
+            // start from the beginning of enclosingNode to handle the entire 'originalRange'
+            if (precedingToken.end >= originalRange.pos) {
+                return enclosingNode.pos;
+            }
+            return precedingToken.end;
+        }
+        /*
+         * For cases like
+         * if (a ||
+         *     b ||$
+         *     c) {...}
+         * If we hit Enter at $ we want line '    b ||' to be indented.
+         * Formatting will be applied to the last two lines.
+         * Node that fully encloses these lines is binary expression 'a ||...'.
+         * Initial indentation for this node will be 0.
+         * Binary expressions don't introduce new indentation scopes, however it is possible
+         * that some parent node on the same line does - like if statement in this case.
+         * Note that we are considering parents only from the same line with initial node -
+         * if parent is on the different line - its delta was already contributed
+         * to the initial indentation.
+         */
+        function getOwnOrInheritedDelta(n, options, sourceFile) {
+            var previousLine = -1 /* Unknown */;
+            var child;
+            while (n) {
+                var line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
+                if (previousLine !== -1 /* Unknown */ && line !== previousLine) {
+                    break;
+                }
+                if (formatting.SmartIndenter.shouldIndentChildNode(n, child)) {
+                    return options.IndentSize;
+                }
+                previousLine = line;
+                child = n;
+                n = n.parent;
+            }
+            return 0;
+        }
+        function formatSpan(originalRange, sourceFile, options, rulesProvider, requestKind) {
+            var rangeContainsError = prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange);
+            // formatting context is used by rules provider
+            var formattingContext = new formatting.FormattingContext(sourceFile, requestKind);
+            // find the smallest node that fully wraps the range and compute the initial indentation for the node
+            var enclosingNode = findEnclosingNode(originalRange, sourceFile);
+            var formattingScanner = formatting.getFormattingScanner(sourceFile, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end);
+            var initialIndentation = formatting.SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options);
+            var previousRangeHasError;
+            var previousRange;
+            var previousParent;
+            var previousRangeStartLine;
+            var lastIndentedLine;
+            var indentationOnLastIndentedLine;
+            var edits = [];
+            formattingScanner.advance();
+            if (formattingScanner.isOnToken()) {
+                var startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
+                var undecoratedStartLine = startLine;
+                if (enclosingNode.decorators) {
+                    undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
+                }
+                var delta = getOwnOrInheritedDelta(enclosingNode, options, sourceFile);
+                processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
+            }
+            if (!formattingScanner.isOnToken()) {
+                var leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
+                if (leadingTrivia) {
+                    processTrivia(leadingTrivia, enclosingNode, enclosingNode, undefined);
+                    trimTrailingWhitespacesForRemainingRange();
+                }
+            }
+            formattingScanner.close();
+            return edits;
+            // local functions
+            /** Tries to compute the indentation for a list element.
+              * If list element is not in range then
+              * function will pick its actual indentation
+              * so it can be pushed downstream as inherited indentation.
+              * If list element is in the range - its indentation will be equal
+              * to inherited indentation from its predecessors.
+              */
+            function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) {
+                if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) ||
+                    ts.rangeContainsStartEnd(range, startPos, endPos) /* Not to miss zero-range nodes e.g. JsxText */) {
+                    if (inheritedIndentation !== -1 /* Unknown */) {
+                        return inheritedIndentation;
+                    }
+                }
+                else {
+                    var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
+                    var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile);
+                    var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
+                    if (startLine !== parentStartLine || startPos === column) {
+                        return column;
+                    }
+                }
+                return -1 /* Unknown */;
+            }
+            function computeIndentation(node, startLine, inheritedIndentation, parent, parentDynamicIndentation, effectiveParentStartLine) {
+                var indentation = inheritedIndentation;
+                var delta = formatting.SmartIndenter.shouldIndentChildNode(node) ? options.IndentSize : 0;
+                if (effectiveParentStartLine === startLine) {
+                    // if node is located on the same line with the parent
+                    // - inherit indentation from the parent
+                    // - push children if either parent of node itself has non-zero delta
+                    indentation = startLine === lastIndentedLine
+                        ? indentationOnLastIndentedLine
+                        : parentDynamicIndentation.getIndentation();
+                    delta = Math.min(options.IndentSize, parentDynamicIndentation.getDelta(node) + delta);
+                }
+                else if (indentation === -1 /* Unknown */) {
+                    if (formatting.SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement(parent, node, startLine, sourceFile)) {
+                        indentation = parentDynamicIndentation.getIndentation();
+                    }
+                    else {
+                        indentation = parentDynamicIndentation.getIndentation() + parentDynamicIndentation.getDelta(node);
+                    }
+                }
+                return {
+                    indentation: indentation,
+                    delta: delta
+                };
+            }
+            function getFirstNonDecoratorTokenOfNode(node) {
+                if (node.modifiers && node.modifiers.length) {
+                    return node.modifiers[0].kind;
+                }
+                switch (node.kind) {
+                    case 221 /* ClassDeclaration */: return 73 /* ClassKeyword */;
+                    case 222 /* InterfaceDeclaration */: return 107 /* InterfaceKeyword */;
+                    case 220 /* FunctionDeclaration */: return 87 /* FunctionKeyword */;
+                    case 224 /* EnumDeclaration */: return 224 /* EnumDeclaration */;
+                    case 149 /* GetAccessor */: return 123 /* GetKeyword */;
+                    case 150 /* SetAccessor */: return 131 /* SetKeyword */;
+                    case 147 /* MethodDeclaration */:
+                        if (node.asteriskToken) {
+                            return 37 /* AsteriskToken */;
+                        }
+                    // fall-through
+                    case 145 /* PropertyDeclaration */:
+                    case 142 /* Parameter */:
+                        return node.name.kind;
+                }
+            }
+            function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
+                return {
+                    getIndentationForComment: function (kind, tokenIndentation, container) {
+                        switch (kind) {
+                            // preceding comment to the token that closes the indentation scope inherits the indentation from the scope
+                            // ..  {
+                            //     // comment
+                            // }
+                            case 16 /* CloseBraceToken */:
+                            case 20 /* CloseBracketToken */:
+                            case 18 /* CloseParenToken */:
+                                return indentation + getEffectiveDelta(delta, container);
+                        }
+                        return tokenIndentation !== -1 /* Unknown */ ? tokenIndentation : indentation;
+                    },
+                    getIndentationForToken: function (line, kind, container) {
+                        if (nodeStartLine !== line && node.decorators) {
+                            if (kind === getFirstNonDecoratorTokenOfNode(node)) {
+                                // if this token is the first token following the list of decorators, we do not need to indent
+                                return indentation;
+                            }
+                        }
+                        switch (kind) {
+                            // open and close brace, 'else' and 'while' (in do statement) tokens has indentation of the parent
+                            case 15 /* OpenBraceToken */:
+                            case 16 /* CloseBraceToken */:
+                            case 19 /* OpenBracketToken */:
+                            case 20 /* CloseBracketToken */:
+                            case 17 /* OpenParenToken */:
+                            case 18 /* CloseParenToken */:
+                            case 80 /* ElseKeyword */:
+                            case 104 /* WhileKeyword */:
+                            case 55 /* AtToken */:
+                                return indentation;
+                            default:
+                                // if token line equals to the line of containing node (this is a first token in the node) - use node indentation
+                                return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
+                        }
+                    },
+                    getIndentation: function () { return indentation; },
+                    getDelta: function (child) { return getEffectiveDelta(delta, child); },
+                    recomputeIndentation: function (lineAdded) {
+                        if (node.parent && formatting.SmartIndenter.shouldIndentChildNode(node.parent, node)) {
+                            if (lineAdded) {
+                                indentation += options.IndentSize;
+                            }
+                            else {
+                                indentation -= options.IndentSize;
+                            }
+                            if (formatting.SmartIndenter.shouldIndentChildNode(node)) {
+                                delta = options.IndentSize;
+                            }
+                            else {
+                                delta = 0;
+                            }
+                        }
+                    }
+                };
+                function getEffectiveDelta(delta, child) {
+                    // Delta value should be zero when the node explicitly prevents indentation of the child node
+                    return formatting.SmartIndenter.nodeWillIndentChild(node, child, true) ? delta : 0;
+                }
+            }
+            function processNode(node, contextNode, nodeStartLine, undecoratedNodeStartLine, indentation, delta) {
+                if (!ts.rangeOverlapsWithStartEnd(originalRange, node.getStart(sourceFile), node.getEnd())) {
+                    return;
+                }
+                var nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
+                // a useful observations when tracking context node
+                //        /
+                //      [a]
+                //   /   |   \
+                //  [b] [c] [d]
+                // node 'a' is a context node for nodes 'b', 'c', 'd'
+                // except for the leftmost leaf token in [b] - in this case context node ('e') is located somewhere above 'a'
+                // this rule can be applied recursively to child nodes of 'a'.
+                //
+                // context node is set to parent node value after processing every child node
+                // context node is set to parent of the token after processing every token
+                var childContextNode = contextNode;
+                // if there are any tokens that logically belong to node and interleave child nodes
+                // such tokens will be consumed in processChildNode for for the child that follows them
+                ts.forEachChild(node, function (child) {
+                    processChildNode(child, /*inheritedIndentation*/ -1 /* Unknown */, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListItem*/ false);
+                }, function (nodes) {
+                    processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
+                });
+                // proceed any tokens in the node that are located after child nodes
+                while (formattingScanner.isOnToken()) {
+                    var tokenInfo = formattingScanner.readTokenInfo(node);
+                    if (tokenInfo.token.end > node.end) {
+                        break;
+                    }
+                    consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation);
+                }
+                function processChildNode(child, inheritedIndentation, parent, parentDynamicIndentation, parentStartLine, undecoratedParentStartLine, isListItem, isFirstListItem) {
+                    var childStartPos = child.getStart(sourceFile);
+                    var childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
+                    var undecoratedChildStartLine = childStartLine;
+                    if (child.decorators) {
+                        undecoratedChildStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(child, sourceFile)).line;
+                    }
+                    // if child is a list item - try to get its indentation
+                    var childIndentationAmount = -1 /* Unknown */;
+                    if (isListItem) {
+                        childIndentationAmount = tryComputeIndentationForListItem(childStartPos, child.end, parentStartLine, originalRange, inheritedIndentation);
+                        if (childIndentationAmount !== -1 /* Unknown */) {
+                            inheritedIndentation = childIndentationAmount;
+                        }
+                    }
+                    // child node is outside the target range - do not dive inside
+                    if (!ts.rangeOverlapsWithStartEnd(originalRange, child.pos, child.end)) {
+                        return inheritedIndentation;
+                    }
+                    if (child.getFullWidth() === 0) {
+                        return inheritedIndentation;
+                    }
+                    while (formattingScanner.isOnToken()) {
+                        // proceed any parent tokens that are located prior to child.getStart()
+                        var tokenInfo = formattingScanner.readTokenInfo(node);
+                        if (tokenInfo.token.end > childStartPos) {
+                            // stop when formatting scanner advances past the beginning of the child
+                            break;
+                        }
+                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation);
+                    }
+                    if (!formattingScanner.isOnToken()) {
+                        return inheritedIndentation;
+                    }
+                    if (ts.isToken(child)) {
+                        // if child node is a token, it does not impact indentation, proceed it using parent indentation scope rules
+                        var tokenInfo = formattingScanner.readTokenInfo(child);
+                        ts.Debug.assert(tokenInfo.token.end === child.end);
+                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
+                        return inheritedIndentation;
+                    }
+                    var effectiveParentStartLine = child.kind === 143 /* Decorator */ ? childStartLine : undecoratedParentStartLine;
+                    var childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
+                    processNode(child, childContextNode, childStartLine, undecoratedChildStartLine, childIndentation.indentation, childIndentation.delta);
+                    childContextNode = node;
+                    if (isFirstListItem && parent.kind === 170 /* ArrayLiteralExpression */ && inheritedIndentation === -1 /* Unknown */) {
+                        inheritedIndentation = childIndentation.indentation;
+                    }
+                    return inheritedIndentation;
+                }
+                function processChildNodes(nodes, parent, parentStartLine, parentDynamicIndentation) {
+                    var listStartToken = getOpenTokenForList(parent, nodes);
+                    var listEndToken = getCloseTokenForOpenToken(listStartToken);
+                    var listDynamicIndentation = parentDynamicIndentation;
+                    var startLine = parentStartLine;
+                    if (listStartToken !== 0 /* Unknown */) {
+                        // introduce a new indentation scope for lists (including list start and end tokens)
+                        while (formattingScanner.isOnToken()) {
+                            var tokenInfo = formattingScanner.readTokenInfo(parent);
+                            if (tokenInfo.token.end > nodes.pos) {
+                                // stop when formatting scanner moves past the beginning of node list
+                                break;
+                            }
+                            else if (tokenInfo.token.kind === listStartToken) {
+                                // consume list start token
+                                startLine = sourceFile.getLineAndCharacterOfPosition(tokenInfo.token.pos).line;
+                                var indentation_1 = computeIndentation(tokenInfo.token, startLine, -1 /* Unknown */, parent, parentDynamicIndentation, parentStartLine);
+                                listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation_1.indentation, indentation_1.delta);
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
+                            }
+                            else {
+                                // consume any tokens that precede the list as child elements of 'node' using its indentation scope
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation);
+                            }
+                        }
+                    }
+                    var inheritedIndentation = -1 /* Unknown */;
+                    for (var i = 0; i < nodes.length; i++) {
+                        var child = nodes[i];
+                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListItem*/ true, /*isFirstListItem*/ i === 0);
+                    }
+                    if (listEndToken !== 0 /* Unknown */) {
+                        if (formattingScanner.isOnToken()) {
+                            var tokenInfo = formattingScanner.readTokenInfo(parent);
+                            // consume the list end token only if it is still belong to the parent
+                            // there might be the case when current token matches end token but does not considered as one
+                            // function (x: function) <--
+                            // without this check close paren will be interpreted as list end token for function expression which is wrong
+                            if (tokenInfo.token.kind === listEndToken && ts.rangeContainsRange(parent, tokenInfo.token)) {
+                                // consume list end token
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
+                            }
+                        }
+                    }
+                }
+                function consumeTokenAndAdvanceScanner(currentTokenInfo, parent, dynamicIndentation, container) {
+                    ts.Debug.assert(ts.rangeContainsRange(parent, currentTokenInfo.token));
+                    var lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
+                    var indentToken = false;
+                    if (currentTokenInfo.leadingTrivia) {
+                        processTrivia(currentTokenInfo.leadingTrivia, parent, childContextNode, dynamicIndentation);
+                    }
+                    var lineAdded;
+                    var isTokenInRange = ts.rangeContainsRange(originalRange, currentTokenInfo.token);
+                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
+                    if (isTokenInRange) {
+                        var rangeHasError = rangeContainsError(currentTokenInfo.token);
+                        // save previousRange since processRange will overwrite this value with current one
+                        var savePreviousRange = previousRange;
+                        lineAdded = processRange(currentTokenInfo.token, tokenStart, parent, childContextNode, dynamicIndentation);
+                        if (rangeHasError) {
+                            // do not indent comments\token if token range overlaps with some error
+                            indentToken = false;
+                        }
+                        else {
+                            if (lineAdded !== undefined) {
+                                indentToken = lineAdded;
+                            }
+                            else {
+                                // indent token only if end line of previous range does not match start line of the token
+                                var prevEndLine = savePreviousRange && sourceFile.getLineAndCharacterOfPosition(savePreviousRange.end).line;
+                                indentToken = lastTriviaWasNewLine && tokenStart.line !== prevEndLine;
+                            }
+                        }
+                    }
+                    if (currentTokenInfo.trailingTrivia) {
+                        processTrivia(currentTokenInfo.trailingTrivia, parent, childContextNode, dynamicIndentation);
+                    }
+                    if (indentToken) {
+                        var tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
+                            dynamicIndentation.getIndentationForToken(tokenStart.line, currentTokenInfo.token.kind, container) :
+                            -1 /* Unknown */;
+                        var indentNextTokenOrTrivia = true;
+                        if (currentTokenInfo.leadingTrivia) {
+                            var commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
+                            for (var _i = 0, _a = currentTokenInfo.leadingTrivia; _i < _a.length; _i++) {
+                                var triviaItem = _a[_i];
+                                var triviaInRange = ts.rangeContainsRange(originalRange, triviaItem);
+                                switch (triviaItem.kind) {
+                                    case 3 /* MultiLineCommentTrivia */:
+                                        if (triviaInRange) {
+                                            indentMultilineComment(triviaItem, commentIndentation, /*firstLineIsIndented*/ !indentNextTokenOrTrivia);
+                                        }
+                                        indentNextTokenOrTrivia = false;
+                                        break;
+                                    case 2 /* SingleLineCommentTrivia */:
+                                        if (indentNextTokenOrTrivia && triviaInRange) {
+                                            insertIndentation(triviaItem.pos, commentIndentation, /*lineAdded*/ false);
+                                        }
+                                        indentNextTokenOrTrivia = false;
+                                        break;
+                                    case 4 /* NewLineTrivia */:
+                                        indentNextTokenOrTrivia = true;
+                                        break;
+                                }
+                            }
+                        }
+                        // indent token only if is it is in target range and does not overlap with any error ranges
+                        if (tokenIndentation !== -1 /* Unknown */ && indentNextTokenOrTrivia) {
+                            insertIndentation(currentTokenInfo.token.pos, tokenIndentation, lineAdded);
+                            lastIndentedLine = tokenStart.line;
+                            indentationOnLastIndentedLine = tokenIndentation;
+                        }
+                    }
+                    formattingScanner.advance();
+                    childContextNode = parent;
+                }
+            }
+            function processTrivia(trivia, parent, contextNode, dynamicIndentation) {
+                for (var _i = 0, trivia_1 = trivia; _i < trivia_1.length; _i++) {
+                    var triviaItem = trivia_1[_i];
+                    if (ts.isComment(triviaItem.kind) && ts.rangeContainsRange(originalRange, triviaItem)) {
+                        var triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
+                        processRange(triviaItem, triviaItemStart, parent, contextNode, dynamicIndentation);
+                    }
+                }
+            }
+            function processRange(range, rangeStart, parent, contextNode, dynamicIndentation) {
+                var rangeHasError = rangeContainsError(range);
+                var lineAdded;
+                if (!rangeHasError && !previousRangeHasError) {
+                    if (!previousRange) {
+                        // trim whitespaces starting from the beginning of the span up to the current line
+                        var originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
+                        trimTrailingWhitespacesForLines(originalStart.line, rangeStart.line);
+                    }
+                    else {
+                        lineAdded =
+                            processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation);
+                    }
+                }
+                previousRange = range;
+                previousParent = parent;
+                previousRangeStartLine = rangeStart.line;
+                previousRangeHasError = rangeHasError;
+                return lineAdded;
+            }
+            function processPair(currentItem, currentStartLine, currentParent, previousItem, previousStartLine, previousParent, contextNode, dynamicIndentation) {
+                formattingContext.updateContext(previousItem, previousParent, currentItem, currentParent, contextNode);
+                var rule = rulesProvider.getRulesMap().GetRule(formattingContext);
+                var trimTrailingWhitespaces;
+                var lineAdded;
+                if (rule) {
+                    applyRuleEdits(rule, previousItem, previousStartLine, currentItem, currentStartLine);
+                    if (rule.Operation.Action & (2 /* Space */ | 8 /* Delete */) && currentStartLine !== previousStartLine) {
+                        lineAdded = false;
+                        // Handle the case where the next line is moved to be the end of this line.
+                        // In this case we don't indent the next line in the next pass.
+                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
+                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ false);
+                        }
+                    }
+                    else if (rule.Operation.Action & 4 /* NewLine */ && currentStartLine === previousStartLine) {
+                        lineAdded = true;
+                        // Handle the case where token2 is moved to the new line.
+                        // In this case we indent token2 in the next pass but we set
+                        // sameLineIndent flag to notify the indenter that the indentation is within the line.
+                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
+                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ true);
+                        }
+                    }
+                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
+                    trimTrailingWhitespaces = !(rule.Operation.Action & 8 /* Delete */) && rule.Flag !== 1 /* CanDeleteNewLines */;
+                }
+                else {
+                    trimTrailingWhitespaces = true;
+                }
+                if (currentStartLine !== previousStartLine && trimTrailingWhitespaces) {
+                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
+                    trimTrailingWhitespacesForLines(previousStartLine, currentStartLine, previousItem);
+                }
+                return lineAdded;
+            }
+            function insertIndentation(pos, indentation, lineAdded) {
+                var indentationString = getIndentationString(indentation, options);
+                if (lineAdded) {
+                    // new line is added before the token by the formatting rules
+                    // insert indentation string at the very beginning of the token
+                    recordReplace(pos, 0, indentationString);
+                }
+                else {
+                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
+                    var startLinePosition = ts.getStartPositionOfLine(tokenStart.line, sourceFile);
+                    if (indentation !== tokenStart.character || indentationIsDifferent(indentationString, startLinePosition)) {
+                        recordReplace(startLinePosition, tokenStart.character, indentationString);
+                    }
+                }
+            }
+            function indentationIsDifferent(indentationString, startLinePosition) {
+                return indentationString !== sourceFile.text.substr(startLinePosition, indentationString.length);
+            }
+            function indentMultilineComment(commentRange, indentation, firstLineIsIndented) {
+                // split comment in lines
+                var startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
+                var endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
+                var parts;
+                if (startLine === endLine) {
+                    if (!firstLineIsIndented) {
+                        // treat as single line comment
+                        insertIndentation(commentRange.pos, indentation, /*lineAdded*/ false);
+                    }
+                    return;
+                }
+                else {
+                    parts = [];
+                    var startPos = commentRange.pos;
+                    for (var line = startLine; line < endLine; line++) {
+                        var endOfLine = ts.getEndLinePosition(line, sourceFile);
+                        parts.push({ pos: startPos, end: endOfLine });
+                        startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
+                    }
+                    parts.push({ pos: startPos, end: commentRange.end });
+                }
+                var startLinePos = ts.getStartPositionOfLine(startLine, sourceFile);
+                var nonWhitespaceColumnInFirstPart = formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(startLinePos, parts[0].pos, sourceFile, options);
+                if (indentation === nonWhitespaceColumnInFirstPart.column) {
+                    return;
+                }
+                var startIndex = 0;
+                if (firstLineIsIndented) {
+                    startIndex = 1;
+                    startLine++;
+                }
+                // shift all parts on the delta size
+                var delta = indentation - nonWhitespaceColumnInFirstPart.column;
+                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
+                    var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
+                    var nonWhitespaceCharacterAndColumn = i === 0
+                        ? nonWhitespaceColumnInFirstPart
+                        : formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(parts[i].pos, parts[i].end, sourceFile, options);
+                    var newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
+                    if (newIndentation > 0) {
+                        var indentationString = getIndentationString(newIndentation, options);
+                        recordReplace(startLinePos_1, nonWhitespaceCharacterAndColumn.character, indentationString);
+                    }
+                    else {
+                        recordDelete(startLinePos_1, nonWhitespaceCharacterAndColumn.character);
+                    }
+                }
+            }
+            function trimTrailingWhitespacesForLines(line1, line2, range) {
+                for (var line = line1; line < line2; line++) {
+                    var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
+                    var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
+                    // do not trim whitespaces in comments or template expression
+                    if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
+                        continue;
+                    }
+                    var whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
+                    if (whitespaceStart !== -1) {
+                        ts.Debug.assert(whitespaceStart === lineStartPosition || !ts.isWhiteSpace(sourceFile.text.charCodeAt(whitespaceStart - 1)));
+                        recordDelete(whitespaceStart, lineEndPosition + 1 - whitespaceStart);
+                    }
+                }
+            }
+            /**
+             * @param start The position of the first character in range
+             * @param end The position of the last character in range
+             */
+            function getTrailingWhitespaceStartPosition(start, end) {
+                var pos = end;
+                while (pos >= start && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
+                    pos--;
+                }
+                if (pos !== end) {
+                    return pos + 1;
+                }
+                return -1;
+            }
+            /**
+             * Trimming will be done for lines after the previous range
+             */
+            function trimTrailingWhitespacesForRemainingRange() {
+                var startPosition = previousRange ? previousRange.end : originalRange.pos;
+                var startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
+                var endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
+                trimTrailingWhitespacesForLines(startLine, endLine + 1, previousRange);
+            }
+            function newTextChange(start, len, newText) {
+                return { span: ts.createTextSpan(start, len), newText: newText };
+            }
+            function recordDelete(start, len) {
+                if (len) {
+                    edits.push(newTextChange(start, len, ""));
+                }
+            }
+            function recordReplace(start, len, newText) {
+                if (len || newText) {
+                    edits.push(newTextChange(start, len, newText));
+                }
+            }
+            function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
+                switch (rule.Operation.Action) {
+                    case 1 /* Ignore */:
+                        // no action required
+                        return;
+                    case 8 /* Delete */:
+                        if (previousRange.end !== currentRange.pos) {
+                            // delete characters starting from t1.end up to t2.pos exclusive
+                            recordDelete(previousRange.end, currentRange.pos - previousRange.end);
+                        }
+                        break;
+                    case 4 /* NewLine */:
+                        // exit early if we on different lines and rule cannot change number of newlines
+                        // if line1 and line2 are on subsequent lines then no edits are required - ok to exit
+                        // if line1 and line2 are separated with more than one newline - ok to exit since we cannot delete extra new lines
+                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
+                            return;
+                        }
+                        // edit should not be applied only if we have one line feed between elements
+                        var lineDelta = currentStartLine - previousStartLine;
+                        if (lineDelta !== 1) {
+                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, options.NewLineCharacter);
+                        }
+                        break;
+                    case 2 /* Space */:
+                        // exit early if we on different lines and rule cannot change number of newlines
+                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
+                            return;
+                        }
+                        var posDelta = currentRange.pos - previousRange.end;
+                        if (posDelta !== 1 || sourceFile.text.charCodeAt(previousRange.end) !== 32 /* space */) {
+                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, " ");
+                        }
+                        break;
+                }
+            }
+        }
+        function getOpenTokenForList(node, list) {
+            switch (node.kind) {
+                case 148 /* Constructor */:
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 180 /* ArrowFunction */:
+                    if (node.typeParameters === list) {
+                        return 25 /* LessThanToken */;
+                    }
+                    else if (node.parameters === list) {
+                        return 17 /* OpenParenToken */;
+                    }
+                    break;
+                case 174 /* CallExpression */:
+                case 175 /* NewExpression */:
+                    if (node.typeArguments === list) {
+                        return 25 /* LessThanToken */;
+                    }
+                    else if (node.arguments === list) {
+                        return 17 /* OpenParenToken */;
+                    }
+                    break;
+                case 155 /* TypeReference */:
+                    if (node.typeArguments === list) {
+                        return 25 /* LessThanToken */;
+                    }
+            }
+            return 0 /* Unknown */;
+        }
+        function getCloseTokenForOpenToken(kind) {
+            switch (kind) {
+                case 17 /* OpenParenToken */:
+                    return 18 /* CloseParenToken */;
+                case 25 /* LessThanToken */:
+                    return 27 /* GreaterThanToken */;
+            }
+            return 0 /* Unknown */;
+        }
+        var internedSizes;
+        var internedTabsIndentation;
+        var internedSpacesIndentation;
+        function getIndentationString(indentation, options) {
+            // reset interned strings if FormatCodeOptions were changed
+            var resetInternedStrings = !internedSizes || (internedSizes.tabSize !== options.TabSize || internedSizes.indentSize !== options.IndentSize);
+            if (resetInternedStrings) {
+                internedSizes = { tabSize: options.TabSize, indentSize: options.IndentSize };
+                internedTabsIndentation = internedSpacesIndentation = undefined;
+            }
+            if (!options.ConvertTabsToSpaces) {
+                var tabs = Math.floor(indentation / options.TabSize);
+                var spaces = indentation - tabs * options.TabSize;
+                var tabString = void 0;
+                if (!internedTabsIndentation) {
+                    internedTabsIndentation = [];
+                }
+                if (internedTabsIndentation[tabs] === undefined) {
+                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
+                }
+                else {
+                    tabString = internedTabsIndentation[tabs];
+                }
+                return spaces ? tabString + repeat(" ", spaces) : tabString;
+            }
+            else {
+                var spacesString = void 0;
+                var quotient = Math.floor(indentation / options.IndentSize);
+                var remainder = indentation % options.IndentSize;
+                if (!internedSpacesIndentation) {
+                    internedSpacesIndentation = [];
+                }
+                if (internedSpacesIndentation[quotient] === undefined) {
+                    spacesString = repeat(" ", options.IndentSize * quotient);
+                    internedSpacesIndentation[quotient] = spacesString;
+                }
+                else {
+                    spacesString = internedSpacesIndentation[quotient];
+                }
+                return remainder ? spacesString + repeat(" ", remainder) : spacesString;
+            }
+            function repeat(value, count) {
+                var s = "";
+                for (var i = 0; i < count; i++) {
+                    s += value;
+                }
+                return s;
+            }
+        }
+        formatting.getIndentationString = getIndentationString;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='..\services.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var SmartIndenter;
+        (function (SmartIndenter) {
+            var Value;
+            (function (Value) {
+                Value[Value["Unknown"] = -1] = "Unknown";
+            })(Value || (Value = {}));
+            function getIndentation(position, sourceFile, options) {
+                if (position > sourceFile.text.length) {
+                    return 0; // past EOF
+                }
+                // no indentation when the indent style is set to none,
+                // so we can return fast
+                if (options.IndentStyle === ts.IndentStyle.None) {
+                    return 0;
+                }
+                var precedingToken = ts.findPrecedingToken(position, sourceFile);
+                if (!precedingToken) {
+                    return 0;
+                }
+                // no indentation in string \regex\template literals
+                var precedingTokenIsLiteral = ts.isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
+                if (precedingTokenIsLiteral && precedingToken.getStart(sourceFile) <= position && precedingToken.end > position) {
+                    return 0;
+                }
+                var lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
+                // indentation is first non-whitespace character in a previous line
+                // for block indentation, we should look for a line which contains something that's not
+                // whitespace.
+                if (options.IndentStyle === ts.IndentStyle.Block) {
+                    // move backwards until we find a line with a non-whitespace character,
+                    // then find the first non-whitespace character for that line.
+                    var current_1 = position;
+                    while (current_1 > 0) {
+                        var char = sourceFile.text.charCodeAt(current_1);
+                        if (!ts.isWhiteSpace(char) && !ts.isLineBreak(char)) {
+                            break;
+                        }
+                        current_1--;
+                    }
+                    var lineStart = ts.getLineStartPositionForPosition(current_1, sourceFile);
+                    return SmartIndenter.findFirstNonWhitespaceColumn(lineStart, current_1, sourceFile, options);
+                }
+                if (precedingToken.kind === 24 /* CommaToken */ && precedingToken.parent.kind !== 187 /* BinaryExpression */) {
+                    // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
+                    var actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
+                    if (actualIndentation !== -1 /* Unknown */) {
+                        return actualIndentation;
+                    }
+                }
+                // try to find node that can contribute to indentation and includes 'position' starting from 'precedingToken'
+                // if such node is found - compute initial indentation for 'position' inside this node
+                var previous;
+                var current = precedingToken;
+                var currentStart;
+                var indentationDelta;
+                while (current) {
+                    if (ts.positionBelongsToNode(current, position, sourceFile) && shouldIndentChildNode(current, previous)) {
+                        currentStart = getStartLineAndCharacterForNode(current, sourceFile);
+                        if (nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile)) {
+                            indentationDelta = 0;
+                        }
+                        else {
+                            indentationDelta = lineAtPosition !== currentStart.line ? options.IndentSize : 0;
+                        }
+                        break;
+                    }
+                    // check if current node is a list item - if yes, take indentation from it
+                    var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
+                    if (actualIndentation !== -1 /* Unknown */) {
+                        return actualIndentation;
+                    }
+                    actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
+                    if (actualIndentation !== -1 /* Unknown */) {
+                        return actualIndentation + options.IndentSize;
+                    }
+                    previous = current;
+                    current = current.parent;
+                }
+                if (!current) {
+                    // no parent was found - return 0 to be indented on the level of SourceFile
+                    return 0;
+                }
+                return getIndentationForNodeWorker(current, currentStart, /*ignoreActualIndentationRange*/ undefined, indentationDelta, sourceFile, options);
+            }
+            SmartIndenter.getIndentation = getIndentation;
+            function getIndentationForNode(n, ignoreActualIndentationRange, sourceFile, options) {
+                var start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+                return getIndentationForNodeWorker(n, start, ignoreActualIndentationRange, /*indentationDelta*/ 0, sourceFile, options);
+            }
+            SmartIndenter.getIndentationForNode = getIndentationForNode;
+            function getIndentationForNodeWorker(current, currentStart, ignoreActualIndentationRange, indentationDelta, sourceFile, options) {
+                var parent = current.parent;
+                var parentStart;
+                // walk upwards and collect indentations for pairs of parent-child nodes
+                // indentation is not added if parent and child nodes start on the same line or if parent is IfStatement and child starts on the same line with 'else clause'
+                while (parent) {
+                    var useActualIndentation = true;
+                    if (ignoreActualIndentationRange) {
+                        var start = current.getStart(sourceFile);
+                        useActualIndentation = start < ignoreActualIndentationRange.pos || start > ignoreActualIndentationRange.end;
+                    }
+                    if (useActualIndentation) {
+                        // check if current node is a list item - if yes, take indentation from it
+                        var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
+                        if (actualIndentation !== -1 /* Unknown */) {
+                            return actualIndentation + indentationDelta;
+                        }
+                    }
+                    parentStart = getParentStart(parent, current, sourceFile);
+                    var parentAndChildShareLine = parentStart.line === currentStart.line ||
+                        childStartsOnTheSameLineWithElseInIfStatement(parent, current, currentStart.line, sourceFile);
+                    if (useActualIndentation) {
+                        // try to fetch actual indentation for current node from source text
+                        var actualIndentation = getActualIndentationForNode(current, parent, currentStart, parentAndChildShareLine, sourceFile, options);
+                        if (actualIndentation !== -1 /* Unknown */) {
+                            return actualIndentation + indentationDelta;
+                        }
+                        actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
+                        if (actualIndentation !== -1 /* Unknown */) {
+                            return actualIndentation + indentationDelta;
+                        }
+                    }
+                    // increase indentation if parent node wants its content to be indented and parent and child nodes don't start on the same line
+                    if (shouldIndentChildNode(parent, current) && !parentAndChildShareLine) {
+                        indentationDelta += options.IndentSize;
+                    }
+                    current = parent;
+                    currentStart = parentStart;
+                    parent = current.parent;
+                }
+                return indentationDelta;
+            }
+            function getParentStart(parent, child, sourceFile) {
+                var containingList = getContainingList(child, sourceFile);
+                if (containingList) {
+                    return sourceFile.getLineAndCharacterOfPosition(containingList.pos);
+                }
+                return sourceFile.getLineAndCharacterOfPosition(parent.getStart(sourceFile));
+            }
+            /*
+             * Function returns Value.Unknown if indentation cannot be determined
+             */
+            function getActualIndentationForListItemBeforeComma(commaToken, sourceFile, options) {
+                // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
+                var commaItemInfo = ts.findListItemInfo(commaToken);
+                if (commaItemInfo && commaItemInfo.listItemIndex > 0) {
+                    return deriveActualIndentationFromList(commaItemInfo.list.getChildren(), commaItemInfo.listItemIndex - 1, sourceFile, options);
+                }
+                else {
+                    // handle broken code gracefully
+                    return -1 /* Unknown */;
+                }
+            }
+            /*
+             * Function returns Value.Unknown if actual indentation for node should not be used (i.e because node is nested expression)
+             */
+            function getActualIndentationForNode(current, parent, currentLineAndChar, parentAndChildShareLine, sourceFile, options) {
+                // actual indentation is used for statements\declarations if one of cases below is true:
+                // - parent is SourceFile - by default immediate children of SourceFile are not indented except when user indents them manually
+                // - parent and child are not on the same line
+                var useActualIndentation = (ts.isDeclaration(current) || ts.isStatement(current)) &&
+                    (parent.kind === 256 /* SourceFile */ || !parentAndChildShareLine);
+                if (!useActualIndentation) {
+                    return -1 /* Unknown */;
+                }
+                return findColumnForFirstNonWhitespaceCharacterInLine(currentLineAndChar, sourceFile, options);
+            }
+            function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile) {
+                var nextToken = ts.findNextToken(precedingToken, current);
+                if (!nextToken) {
+                    return false;
+                }
+                if (nextToken.kind === 15 /* OpenBraceToken */) {
+                    // open braces are always indented at the parent level
+                    return true;
+                }
+                else if (nextToken.kind === 16 /* CloseBraceToken */) {
+                    // close braces are indented at the parent level if they are located on the same line with cursor
+                    // this means that if new line will be added at $ position, this case will be indented
+                    // class A {
+                    //    $
+                    // }
+                    /// and this one - not
+                    // class A {
+                    // $}
+                    var nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
+                    return lineAtPosition === nextTokenStartLine;
+                }
+                return false;
+            }
+            function getStartLineAndCharacterForNode(n, sourceFile) {
+                return sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+            }
+            function childStartsOnTheSameLineWithElseInIfStatement(parent, child, childStartLine, sourceFile) {
+                if (parent.kind === 203 /* IfStatement */ && parent.elseStatement === child) {
+                    var elseKeyword = ts.findChildOfKind(parent, 80 /* ElseKeyword */, sourceFile);
+                    ts.Debug.assert(elseKeyword !== undefined);
+                    var elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
+                    return elseKeywordStartLine === childStartLine;
+                }
+                return false;
+            }
+            SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement = childStartsOnTheSameLineWithElseInIfStatement;
+            function getContainingList(node, sourceFile) {
+                if (node.parent) {
+                    switch (node.parent.kind) {
+                        case 155 /* TypeReference */:
+                            if (node.parent.typeArguments &&
+                                ts.rangeContainsStartEnd(node.parent.typeArguments, node.getStart(sourceFile), node.getEnd())) {
+                                return node.parent.typeArguments;
+                            }
+                            break;
+                        case 171 /* ObjectLiteralExpression */:
+                            return node.parent.properties;
+                        case 170 /* ArrayLiteralExpression */:
+                            return node.parent.elements;
+                        case 220 /* FunctionDeclaration */:
+                        case 179 /* FunctionExpression */:
+                        case 180 /* ArrowFunction */:
+                        case 147 /* MethodDeclaration */:
+                        case 146 /* MethodSignature */:
+                        case 151 /* CallSignature */:
+                        case 152 /* ConstructSignature */: {
+                            var start = node.getStart(sourceFile);
+                            if (node.parent.typeParameters &&
+                                ts.rangeContainsStartEnd(node.parent.typeParameters, start, node.getEnd())) {
+                                return node.parent.typeParameters;
+                            }
+                            if (ts.rangeContainsStartEnd(node.parent.parameters, start, node.getEnd())) {
+                                return node.parent.parameters;
+                            }
+                            break;
+                        }
+                        case 175 /* NewExpression */:
+                        case 174 /* CallExpression */: {
+                            var start = node.getStart(sourceFile);
+                            if (node.parent.typeArguments &&
+                                ts.rangeContainsStartEnd(node.parent.typeArguments, start, node.getEnd())) {
+                                return node.parent.typeArguments;
+                            }
+                            if (node.parent.arguments &&
+                                ts.rangeContainsStartEnd(node.parent.arguments, start, node.getEnd())) {
+                                return node.parent.arguments;
+                            }
+                            break;
+                        }
+                    }
+                }
+                return undefined;
+            }
+            function getActualIndentationForListItem(node, sourceFile, options) {
+                var containingList = getContainingList(node, sourceFile);
+                return containingList ? getActualIndentationFromList(containingList) : -1 /* Unknown */;
+                function getActualIndentationFromList(list) {
+                    var index = ts.indexOf(list, node);
+                    return index !== -1 ? deriveActualIndentationFromList(list, index, sourceFile, options) : -1 /* Unknown */;
+                }
+            }
+            function getLineIndentationWhenExpressionIsInMultiLine(node, sourceFile, options) {
+                // actual indentation should not be used when:
+                // - node is close parenthesis - this is the end of the expression
+                if (node.kind === 18 /* CloseParenToken */) {
+                    return -1 /* Unknown */;
+                }
+                if (node.parent && (node.parent.kind === 174 /* CallExpression */ ||
+                    node.parent.kind === 175 /* NewExpression */) &&
+                    node.parent.expression !== node) {
+                    var fullCallOrNewExpression = node.parent.expression;
+                    var startingExpression = getStartingExpression(fullCallOrNewExpression);
+                    if (fullCallOrNewExpression === startingExpression) {
+                        return -1 /* Unknown */;
+                    }
+                    var fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
+                    var startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
+                    if (fullCallOrNewExpressionEnd.line === startingExpressionEnd.line) {
+                        return -1 /* Unknown */;
+                    }
+                    return findColumnForFirstNonWhitespaceCharacterInLine(fullCallOrNewExpressionEnd, sourceFile, options);
+                }
+                return -1 /* Unknown */;
+                function getStartingExpression(node) {
+                    while (true) {
+                        switch (node.kind) {
+                            case 174 /* CallExpression */:
+                            case 175 /* NewExpression */:
+                            case 172 /* PropertyAccessExpression */:
+                            case 173 /* ElementAccessExpression */:
+                                node = node.expression;
+                                break;
+                            default:
+                                return node;
+                        }
+                    }
+                }
+            }
+            function deriveActualIndentationFromList(list, index, sourceFile, options) {
+                ts.Debug.assert(index >= 0 && index < list.length);
+                var node = list[index];
+                // walk toward the start of the list starting from current node and check if the line is the same for all items.
+                // if end line for item [i - 1] differs from the start line for item [i] - find column of the first non-whitespace character on the line of item [i]
+                var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
+                for (var i = index - 1; i >= 0; i--) {
+                    if (list[i].kind === 24 /* CommaToken */) {
+                        continue;
+                    }
+                    // skip list items that ends on the same line with the current list element
+                    var prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
+                    if (prevEndLine !== lineAndCharacter.line) {
+                        return findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options);
+                    }
+                    lineAndCharacter = getStartLineAndCharacterForNode(list[i], sourceFile);
+                }
+                return -1 /* Unknown */;
+            }
+            function findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options) {
+                var lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
+                return findFirstNonWhitespaceColumn(lineStart, lineStart + lineAndCharacter.character, sourceFile, options);
+            }
+            /*
+                Character is the actual index of the character since the beginning of the line.
+                Column - position of the character after expanding tabs to spaces
+                "0\t2$"
+                value of 'character' for '$' is 3
+                value of 'column' for '$' is 6 (assuming that tab size is 4)
+            */
+            function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
+                var character = 0;
+                var column = 0;
+                for (var pos = startPos; pos < endPos; pos++) {
+                    var ch = sourceFile.text.charCodeAt(pos);
+                    if (!ts.isWhiteSpace(ch)) {
+                        break;
+                    }
+                    if (ch === 9 /* tab */) {
+                        column += options.TabSize + (column % options.TabSize);
+                    }
+                    else {
+                        column++;
+                    }
+                    character++;
+                }
+                return { column: column, character: character };
+            }
+            SmartIndenter.findFirstNonWhitespaceCharacterAndColumn = findFirstNonWhitespaceCharacterAndColumn;
+            function findFirstNonWhitespaceColumn(startPos, endPos, sourceFile, options) {
+                return findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options).column;
+            }
+            SmartIndenter.findFirstNonWhitespaceColumn = findFirstNonWhitespaceColumn;
+            function nodeContentIsAlwaysIndented(kind) {
+                switch (kind) {
+                    case 202 /* ExpressionStatement */:
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 223 /* TypeAliasDeclaration */:
+                    case 170 /* ArrayLiteralExpression */:
+                    case 199 /* Block */:
+                    case 226 /* ModuleBlock */:
+                    case 171 /* ObjectLiteralExpression */:
+                    case 159 /* TypeLiteral */:
+                    case 161 /* TupleType */:
+                    case 227 /* CaseBlock */:
+                    case 250 /* DefaultClause */:
+                    case 249 /* CaseClause */:
+                    case 178 /* ParenthesizedExpression */:
+                    case 172 /* PropertyAccessExpression */:
+                    case 174 /* CallExpression */:
+                    case 175 /* NewExpression */:
+                    case 200 /* VariableStatement */:
+                    case 218 /* VariableDeclaration */:
+                    case 235 /* ExportAssignment */:
+                    case 211 /* ReturnStatement */:
+                    case 188 /* ConditionalExpression */:
+                    case 168 /* ArrayBindingPattern */:
+                    case 167 /* ObjectBindingPattern */:
+                    case 243 /* JsxOpeningElement */:
+                    case 242 /* JsxSelfClosingElement */:
+                    case 248 /* JsxExpression */:
+                    case 146 /* MethodSignature */:
+                    case 151 /* CallSignature */:
+                    case 152 /* ConstructSignature */:
+                    case 142 /* Parameter */:
+                    case 156 /* FunctionType */:
+                    case 157 /* ConstructorType */:
+                    case 164 /* ParenthesizedType */:
+                    case 176 /* TaggedTemplateExpression */:
+                    case 184 /* AwaitExpression */:
+                    case 233 /* NamedImports */:
+                        return true;
+                }
+                return false;
+            }
+            /* @internal */
+            function nodeWillIndentChild(parent, child, indentByDefault) {
+                var childKind = child ? child.kind : 0 /* Unknown */;
+                switch (parent.kind) {
+                    case 204 /* DoStatement */:
+                    case 205 /* WhileStatement */:
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                    case 206 /* ForStatement */:
+                    case 203 /* IfStatement */:
+                    case 220 /* FunctionDeclaration */:
+                    case 179 /* FunctionExpression */:
+                    case 147 /* MethodDeclaration */:
+                    case 180 /* ArrowFunction */:
+                    case 148 /* Constructor */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        return childKind !== 199 /* Block */;
+                    case 241 /* JsxElement */:
+                        return childKind !== 245 /* JsxClosingElement */;
+                }
+                // No explicit rule for given nodes so the result will follow the default value argument
+                return indentByDefault;
+            }
+            SmartIndenter.nodeWillIndentChild = nodeWillIndentChild;
+            /*
+            Function returns true when the parent node should indent the given child by an explicit rule
+            */
+            function shouldIndentChildNode(parent, child) {
+                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, /*indentByDefault*/ false);
+            }
+            SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
+        })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+/// <reference path="..\compiler\program.ts"/>
+/// <reference path='breakpoints.ts' />
+/// <reference path='outliningElementsCollector.ts' />
+/// <reference path='navigateTo.ts' />
+/// <reference path='navigationBar.ts' />
+/// <reference path='patternMatcher.ts' />
+/// <reference path='signatureHelp.ts' />
+/// <reference path='utilities.ts' />
+/// <reference path='jsTyping.ts' />
+/// <reference path='formatting\formatting.ts' />
+/// <reference path='formatting\smartIndenter.ts' />
+var ts;
+(function (ts) {
+    /** The version of the language service API */
+    ts.servicesVersion = "0.5";
+    var ScriptSnapshot;
+    (function (ScriptSnapshot) {
+        var StringScriptSnapshot = (function () {
+            function StringScriptSnapshot(text) {
+                this.text = text;
+            }
+            StringScriptSnapshot.prototype.getText = function (start, end) {
+                return this.text.substring(start, end);
+            };
+            StringScriptSnapshot.prototype.getLength = function () {
+                return this.text.length;
+            };
+            StringScriptSnapshot.prototype.getChangeRange = function (oldSnapshot) {
+                // Text-based snapshots do not support incremental parsing. Return undefined
+                // to signal that to the caller.
+                return undefined;
+            };
+            return StringScriptSnapshot;
+        }());
+        function fromString(text) {
+            return new StringScriptSnapshot(text);
+        }
+        ScriptSnapshot.fromString = fromString;
+    })(ScriptSnapshot = ts.ScriptSnapshot || (ts.ScriptSnapshot = {}));
+    var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ true);
+    var emptyArray = [];
+    var jsDocTagNames = [
+        "augments",
+        "author",
+        "argument",
+        "borrows",
+        "class",
+        "constant",
+        "constructor",
+        "constructs",
+        "default",
+        "deprecated",
+        "description",
+        "event",
+        "example",
+        "extends",
+        "field",
+        "fileOverview",
+        "function",
+        "ignore",
+        "inner",
+        "lends",
+        "link",
+        "memberOf",
+        "name",
+        "namespace",
+        "param",
+        "private",
+        "property",
+        "public",
+        "requires",
+        "returns",
+        "see",
+        "since",
+        "static",
+        "throws",
+        "type",
+        "typedef",
+        "property",
+        "prop",
+        "version"
+    ];
+    var jsDocCompletionEntries;
+    function createNode(kind, pos, end, flags, parent) {
+        var node = new NodeObject(kind, pos, end);
+        node.flags = flags;
+        node.parent = parent;
+        return node;
+    }
+    var NodeObject = (function () {
+        function NodeObject(kind, pos, end) {
+            this.kind = kind;
+            this.pos = pos;
+            this.end = end;
+            this.flags = 0 /* None */;
+            this.parent = undefined;
+        }
+        NodeObject.prototype.getSourceFile = function () {
+            return ts.getSourceFileOfNode(this);
+        };
+        NodeObject.prototype.getStart = function (sourceFile, includeJsDocComment) {
+            return ts.getTokenPosOfNode(this, sourceFile, includeJsDocComment);
+        };
+        NodeObject.prototype.getFullStart = function () {
+            return this.pos;
+        };
+        NodeObject.prototype.getEnd = function () {
+            return this.end;
+        };
+        NodeObject.prototype.getWidth = function (sourceFile) {
+            return this.getEnd() - this.getStart(sourceFile);
+        };
+        NodeObject.prototype.getFullWidth = function () {
+            return this.end - this.pos;
+        };
+        NodeObject.prototype.getLeadingTriviaWidth = function (sourceFile) {
+            return this.getStart(sourceFile) - this.pos;
+        };
+        NodeObject.prototype.getFullText = function (sourceFile) {
+            return (sourceFile || this.getSourceFile()).text.substring(this.pos, this.end);
+        };
+        NodeObject.prototype.getText = function (sourceFile) {
+            return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
+        };
+        NodeObject.prototype.addSyntheticNodes = function (nodes, pos, end, useJSDocScanner) {
+            scanner.setTextPos(pos);
+            while (pos < end) {
+                var token = useJSDocScanner ? scanner.scanJSDocToken() : scanner.scan();
+                var textPos = scanner.getTextPos();
+                if (textPos <= end) {
+                    nodes.push(createNode(token, pos, textPos, 0, this));
+                }
+                pos = textPos;
+            }
+            return pos;
+        };
+        NodeObject.prototype.createSyntaxList = function (nodes) {
+            var list = createNode(282 /* SyntaxList */, nodes.pos, nodes.end, 0, this);
+            list._children = [];
+            var pos = nodes.pos;
+            for (var _i = 0, nodes_7 = nodes; _i < nodes_7.length; _i++) {
+                var node = nodes_7[_i];
+                if (pos < node.pos) {
+                    pos = this.addSyntheticNodes(list._children, pos, node.pos);
+                }
+                list._children.push(node);
+                pos = node.end;
+            }
+            if (pos < nodes.end) {
+                this.addSyntheticNodes(list._children, pos, nodes.end);
+            }
+            return list;
+        };
+        NodeObject.prototype.createChildren = function (sourceFile) {
+            var _this = this;
+            var children;
+            if (this.kind >= 139 /* FirstNode */) {
+                scanner.setText((sourceFile || this.getSourceFile()).text);
+                children = [];
+                var pos_3 = this.pos;
+                var useJSDocScanner_1 = this.kind >= 273 /* FirstJSDocTagNode */ && this.kind <= 281 /* LastJSDocTagNode */;
+                var processNode = function (node) {
+                    if (pos_3 < node.pos) {
+                        pos_3 = _this.addSyntheticNodes(children, pos_3, node.pos, useJSDocScanner_1);
+                    }
+                    children.push(node);
+                    pos_3 = node.end;
+                };
+                var processNodes = function (nodes) {
+                    if (pos_3 < nodes.pos) {
+                        pos_3 = _this.addSyntheticNodes(children, pos_3, nodes.pos, useJSDocScanner_1);
+                    }
+                    children.push(_this.createSyntaxList(nodes));
+                    pos_3 = nodes.end;
+                };
+                // jsDocComments need to be the first children
+                if (this.jsDocComments) {
+                    for (var _i = 0, _a = this.jsDocComments; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        processNode(jsDocComment);
+                    }
+                }
+                ts.forEachChild(this, processNode, processNodes);
+                if (pos_3 < this.end) {
+                    this.addSyntheticNodes(children, pos_3, this.end);
+                }
+                scanner.setText(undefined);
+            }
+            this._children = children || emptyArray;
+        };
+        NodeObject.prototype.getChildCount = function (sourceFile) {
+            if (!this._children)
+                this.createChildren(sourceFile);
+            return this._children.length;
+        };
+        NodeObject.prototype.getChildAt = function (index, sourceFile) {
+            if (!this._children)
+                this.createChildren(sourceFile);
+            return this._children[index];
+        };
+        NodeObject.prototype.getChildren = function (sourceFile) {
+            if (!this._children)
+                this.createChildren(sourceFile);
+            return this._children;
+        };
+        NodeObject.prototype.getFirstToken = function (sourceFile) {
+            var children = this.getChildren(sourceFile);
+            if (!children.length) {
+                return undefined;
+            }
+            var child = children[0];
+            return child.kind < 139 /* FirstNode */ ? child : child.getFirstToken(sourceFile);
+        };
+        NodeObject.prototype.getLastToken = function (sourceFile) {
+            var children = this.getChildren(sourceFile);
+            var child = ts.lastOrUndefined(children);
+            if (!child) {
+                return undefined;
+            }
+            return child.kind < 139 /* FirstNode */ ? child : child.getLastToken(sourceFile);
+        };
+        return NodeObject;
+    }());
+    var SymbolObject = (function () {
+        function SymbolObject(flags, name) {
+            this.flags = flags;
+            this.name = name;
+        }
+        SymbolObject.prototype.getFlags = function () {
+            return this.flags;
+        };
+        SymbolObject.prototype.getName = function () {
+            return this.name;
+        };
+        SymbolObject.prototype.getDeclarations = function () {
+            return this.declarations;
+        };
+        SymbolObject.prototype.getDocumentationComment = function () {
+            if (this.documentationComment === undefined) {
+                this.documentationComment = getJsDocCommentsFromDeclarations(this.declarations, this.name, !(this.flags & 4 /* Property */));
+            }
+            return this.documentationComment;
+        };
+        return SymbolObject;
+    }());
+    function getJsDocCommentsFromDeclarations(declarations, name, canUseParsedParamTagComments) {
+        var documentationComment = [];
+        var docComments = getJsDocCommentsSeparatedByNewLines();
+        ts.forEach(docComments, function (docComment) {
+            if (documentationComment.length) {
+                documentationComment.push(ts.lineBreakPart());
+            }
+            documentationComment.push(docComment);
+        });
+        return documentationComment;
+        function getJsDocCommentsSeparatedByNewLines() {
+            var paramTag = "@param";
+            var jsDocCommentParts = [];
+            ts.forEach(declarations, function (declaration, indexOfDeclaration) {
+                // Make sure we are collecting doc comment from declaration once,
+                // In case of union property there might be same declaration multiple times
+                // which only varies in type parameter
+                // Eg. const a: Array<string> | Array<number>; a.length
+                // The property length will have two declarations of property length coming
+                // from Array<T> - Array<string> and Array<number>
+                if (ts.indexOf(declarations, declaration) === indexOfDeclaration) {
+                    var sourceFileOfDeclaration = ts.getSourceFileOfNode(declaration);
+                    // If it is parameter - try and get the jsDoc comment with @param tag from function declaration's jsDoc comments
+                    if (canUseParsedParamTagComments && declaration.kind === 142 /* Parameter */) {
+                        if ((declaration.parent.kind === 179 /* FunctionExpression */ || declaration.parent.kind === 180 /* ArrowFunction */) &&
+                            declaration.parent.parent.kind === 218 /* VariableDeclaration */) {
+                            addCommentParts(declaration.parent.parent.parent, sourceFileOfDeclaration, getCleanedParamJsDocComment);
+                        }
+                        addCommentParts(declaration.parent, sourceFileOfDeclaration, getCleanedParamJsDocComment);
+                    }
+                    // If this is left side of dotted module declaration, there is no doc comments associated with this node
+                    if (declaration.kind === 225 /* ModuleDeclaration */ && declaration.body.kind === 225 /* ModuleDeclaration */) {
+                        return;
+                    }
+                    if ((declaration.kind === 179 /* FunctionExpression */ || declaration.kind === 180 /* ArrowFunction */) &&
+                        declaration.parent.kind === 218 /* VariableDeclaration */) {
+                        addCommentParts(declaration.parent.parent, sourceFileOfDeclaration, getCleanedJsDocComment);
+                    }
+                    // If this is dotted module name, get the doc comments from the parent
+                    while (declaration.kind === 225 /* ModuleDeclaration */ && declaration.parent.kind === 225 /* ModuleDeclaration */) {
+                        declaration = declaration.parent;
+                    }
+                    addCommentParts(declaration.kind === 218 /* VariableDeclaration */ ? declaration.parent.parent : declaration, sourceFileOfDeclaration, getCleanedJsDocComment);
+                    if (declaration.kind === 218 /* VariableDeclaration */) {
+                        var init = declaration.initializer;
+                        if (init && (init.kind === 179 /* FunctionExpression */ || init.kind === 180 /* ArrowFunction */)) {
+                            // Get the cleaned js doc comment text from the initializer
+                            addCommentParts(init, sourceFileOfDeclaration, getCleanedJsDocComment);
+                        }
+                    }
+                }
+            });
+            return jsDocCommentParts;
+            function addCommentParts(commented, sourceFileOfDeclaration, getCommentPart) {
+                var ranges = getJsDocCommentTextRange(commented, sourceFileOfDeclaration);
+                // Get the cleaned js doc comment text from the declaration
+                ts.forEach(ranges, function (jsDocCommentTextRange) {
+                    var cleanedComment = getCommentPart(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration);
+                    if (cleanedComment) {
+                        ts.addRange(jsDocCommentParts, cleanedComment);
+                    }
+                });
+            }
+            function getJsDocCommentTextRange(node, sourceFile) {
+                return ts.map(ts.getJsDocComments(node, sourceFile), function (jsDocComment) {
+                    return {
+                        pos: jsDocComment.pos + "/*".length,
+                        end: jsDocComment.end - "*/".length // Trim off comment end indicator
+                    };
+                });
+            }
+            function consumeWhiteSpacesOnTheLine(pos, end, sourceFile, maxSpacesToRemove) {
+                if (maxSpacesToRemove !== undefined) {
+                    end = Math.min(end, pos + maxSpacesToRemove);
+                }
+                for (; pos < end; pos++) {
+                    var ch = sourceFile.text.charCodeAt(pos);
+                    if (!ts.isWhiteSpace(ch) || ts.isLineBreak(ch)) {
+                        // Either found lineBreak or non whiteSpace
+                        return pos;
+                    }
+                }
+                return end;
+            }
+            function consumeLineBreaks(pos, end, sourceFile) {
+                while (pos < end && ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
+                    pos++;
+                }
+                return pos;
+            }
+            function isName(pos, end, sourceFile, name) {
+                return pos + name.length < end &&
+                    sourceFile.text.substr(pos, name.length) === name &&
+                    (ts.isWhiteSpace(sourceFile.text.charCodeAt(pos + name.length)) ||
+                        ts.isLineBreak(sourceFile.text.charCodeAt(pos + name.length)));
+            }
+            function isParamTag(pos, end, sourceFile) {
+                // If it is @param tag
+                return isName(pos, end, sourceFile, paramTag);
+            }
+            function pushDocCommentLineText(docComments, text, blankLineCount) {
+                // Add the empty lines in between texts
+                while (blankLineCount) {
+                    blankLineCount--;
+                    docComments.push(ts.textPart(""));
+                }
+                docComments.push(ts.textPart(text));
+            }
+            function getCleanedJsDocComment(pos, end, sourceFile) {
+                var spacesToRemoveAfterAsterisk;
+                var docComments = [];
+                var blankLineCount = 0;
+                var isInParamTag = false;
+                while (pos < end) {
+                    var docCommentTextOfLine = "";
+                    // First consume leading white space
+                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile);
+                    // If the comment starts with '*' consume the spaces on this line
+                    if (pos < end && sourceFile.text.charCodeAt(pos) === 42 /* asterisk */) {
+                        var lineStartPos = pos + 1;
+                        pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, spacesToRemoveAfterAsterisk);
+                        // Set the spaces to remove after asterisk as margin if not already set
+                        if (spacesToRemoveAfterAsterisk === undefined && pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
+                            spacesToRemoveAfterAsterisk = pos - lineStartPos;
+                        }
+                    }
+                    else if (spacesToRemoveAfterAsterisk === undefined) {
+                        spacesToRemoveAfterAsterisk = 0;
+                    }
+                    // Analyze text on this line
+                    while (pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
+                        var ch = sourceFile.text.charAt(pos);
+                        if (ch === "@") {
+                            // If it is @param tag
+                            if (isParamTag(pos, end, sourceFile)) {
+                                isInParamTag = true;
+                                pos += paramTag.length;
+                                continue;
+                            }
+                            else {
+                                isInParamTag = false;
+                            }
+                        }
+                        // Add the ch to doc text if we arent in param tag
+                        if (!isInParamTag) {
+                            docCommentTextOfLine += ch;
+                        }
+                        // Scan next character
+                        pos++;
+                    }
+                    // Continue with next line
+                    pos = consumeLineBreaks(pos, end, sourceFile);
+                    if (docCommentTextOfLine) {
+                        pushDocCommentLineText(docComments, docCommentTextOfLine, blankLineCount);
+                        blankLineCount = 0;
+                    }
+                    else if (!isInParamTag && docComments.length) {
+                        // This is blank line when there is text already parsed
+                        blankLineCount++;
+                    }
+                }
+                return docComments;
+            }
+            function getCleanedParamJsDocComment(pos, end, sourceFile) {
+                var paramHelpStringMargin;
+                var paramDocComments = [];
+                while (pos < end) {
+                    if (isParamTag(pos, end, sourceFile)) {
+                        var blankLineCount = 0;
+                        var recordedParamTag = false;
+                        // Consume leading spaces
+                        pos = consumeWhiteSpaces(pos + paramTag.length);
+                        if (pos >= end) {
+                            break;
+                        }
+                        // Ignore type expression
+                        if (sourceFile.text.charCodeAt(pos) === 123 /* openBrace */) {
+                            pos++;
+                            for (var curlies = 1; pos < end; pos++) {
+                                var charCode = sourceFile.text.charCodeAt(pos);
+                                // { character means we need to find another } to match the found one
+                                if (charCode === 123 /* openBrace */) {
+                                    curlies++;
+                                    continue;
+                                }
+                                // } char
+                                if (charCode === 125 /* closeBrace */) {
+                                    curlies--;
+                                    if (curlies === 0) {
+                                        // We do not have any more } to match the type expression is ignored completely
+                                        pos++;
+                                        break;
+                                    }
+                                    else {
+                                        // there are more { to be matched with }
+                                        continue;
+                                    }
+                                }
+                                // Found start of another tag
+                                if (charCode === 64 /* at */) {
+                                    break;
+                                }
+                            }
+                            // Consume white spaces
+                            pos = consumeWhiteSpaces(pos);
+                            if (pos >= end) {
+                                break;
+                            }
+                        }
+                        // Parameter name
+                        if (isName(pos, end, sourceFile, name)) {
+                            // Found the parameter we are looking for consume white spaces
+                            pos = consumeWhiteSpaces(pos + name.length);
+                            if (pos >= end) {
+                                break;
+                            }
+                            var paramHelpString = "";
+                            var firstLineParamHelpStringPos = pos;
+                            while (pos < end) {
+                                var ch = sourceFile.text.charCodeAt(pos);
+                                // at line break, set this comment line text and go to next line
+                                if (ts.isLineBreak(ch)) {
+                                    if (paramHelpString) {
+                                        pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
+                                        paramHelpString = "";
+                                        blankLineCount = 0;
+                                        recordedParamTag = true;
+                                    }
+                                    else if (recordedParamTag) {
+                                        blankLineCount++;
+                                    }
+                                    // Get the pos after cleaning start of the line
+                                    setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos);
+                                    continue;
+                                }
+                                // Done scanning param help string - next tag found
+                                if (ch === 64 /* at */) {
+                                    break;
+                                }
+                                paramHelpString += sourceFile.text.charAt(pos);
+                                // Go to next character
+                                pos++;
+                            }
+                            // If there is param help text, add it top the doc comments
+                            if (paramHelpString) {
+                                pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
+                            }
+                            paramHelpStringMargin = undefined;
+                        }
+                        // If this is the start of another tag, continue with the loop in search of param tag with symbol name
+                        if (sourceFile.text.charCodeAt(pos) === 64 /* at */) {
+                            continue;
+                        }
+                    }
+                    // Next character
+                    pos++;
+                }
+                return paramDocComments;
+                function consumeWhiteSpaces(pos) {
+                    while (pos < end && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
+                        pos++;
+                    }
+                    return pos;
+                }
+                function setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos) {
+                    // Get the pos after consuming line breaks
+                    pos = consumeLineBreaks(pos, end, sourceFile);
+                    if (pos >= end) {
+                        return;
+                    }
+                    if (paramHelpStringMargin === undefined) {
+                        paramHelpStringMargin = sourceFile.getLineAndCharacterOfPosition(firstLineParamHelpStringPos).character;
+                    }
+                    // Now consume white spaces max
+                    var startOfLinePos = pos;
+                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile, paramHelpStringMargin);
+                    if (pos >= end) {
+                        return;
+                    }
+                    var consumedSpaces = pos - startOfLinePos;
+                    if (consumedSpaces < paramHelpStringMargin) {
+                        var ch = sourceFile.text.charCodeAt(pos);
+                        if (ch === 42 /* asterisk */) {
+                            // Consume more spaces after asterisk
+                            pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, paramHelpStringMargin - consumedSpaces - 1);
+                        }
+                    }
+                }
+            }
+        }
+    }
+    var TypeObject = (function () {
+        function TypeObject(checker, flags) {
+            this.checker = checker;
+            this.flags = flags;
+        }
+        TypeObject.prototype.getFlags = function () {
+            return this.flags;
+        };
+        TypeObject.prototype.getSymbol = function () {
+            return this.symbol;
+        };
+        TypeObject.prototype.getProperties = function () {
+            return this.checker.getPropertiesOfType(this);
+        };
+        TypeObject.prototype.getProperty = function (propertyName) {
+            return this.checker.getPropertyOfType(this, propertyName);
+        };
+        TypeObject.prototype.getApparentProperties = function () {
+            return this.checker.getAugmentedPropertiesOfType(this);
+        };
+        TypeObject.prototype.getCallSignatures = function () {
+            return this.checker.getSignaturesOfType(this, 0 /* Call */);
+        };
+        TypeObject.prototype.getConstructSignatures = function () {
+            return this.checker.getSignaturesOfType(this, 1 /* Construct */);
+        };
+        TypeObject.prototype.getStringIndexType = function () {
+            return this.checker.getIndexTypeOfType(this, 0 /* String */);
+        };
+        TypeObject.prototype.getNumberIndexType = function () {
+            return this.checker.getIndexTypeOfType(this, 1 /* Number */);
+        };
+        TypeObject.prototype.getBaseTypes = function () {
+            return this.flags & (1024 /* Class */ | 2048 /* Interface */)
+                ? this.checker.getBaseTypes(this)
+                : undefined;
+        };
+        TypeObject.prototype.getNonNullableType = function () {
+            return this.checker.getNonNullableType(this);
+        };
+        return TypeObject;
+    }());
+    var SignatureObject = (function () {
+        function SignatureObject(checker) {
+            this.checker = checker;
+        }
+        SignatureObject.prototype.getDeclaration = function () {
+            return this.declaration;
+        };
+        SignatureObject.prototype.getTypeParameters = function () {
+            return this.typeParameters;
+        };
+        SignatureObject.prototype.getParameters = function () {
+            return this.parameters;
+        };
+        SignatureObject.prototype.getReturnType = function () {
+            return this.checker.getReturnTypeOfSignature(this);
+        };
+        SignatureObject.prototype.getDocumentationComment = function () {
+            if (this.documentationComment === undefined) {
+                this.documentationComment = this.declaration ? getJsDocCommentsFromDeclarations([this.declaration], 
+                /*name*/ undefined, 
+                /*canUseParsedParamTagComments*/ false) : [];
+            }
+            return this.documentationComment;
+        };
+        return SignatureObject;
+    }());
+    var SourceFileObject = (function (_super) {
+        __extends(SourceFileObject, _super);
+        function SourceFileObject(kind, pos, end) {
+            _super.call(this, kind, pos, end);
+        }
+        SourceFileObject.prototype.update = function (newText, textChangeRange) {
+            return ts.updateSourceFile(this, newText, textChangeRange);
+        };
+        SourceFileObject.prototype.getLineAndCharacterOfPosition = function (position) {
+            return ts.getLineAndCharacterOfPosition(this, position);
+        };
+        SourceFileObject.prototype.getLineStarts = function () {
+            return ts.getLineStarts(this);
+        };
+        SourceFileObject.prototype.getPositionOfLineAndCharacter = function (line, character) {
+            return ts.getPositionOfLineAndCharacter(this, line, character);
+        };
+        SourceFileObject.prototype.getNamedDeclarations = function () {
+            if (!this.namedDeclarations) {
+                this.namedDeclarations = this.computeNamedDeclarations();
+            }
+            return this.namedDeclarations;
+        };
+        SourceFileObject.prototype.computeNamedDeclarations = function () {
+            var result = {};
+            ts.forEachChild(this, visit);
+            return result;
+            function addDeclaration(declaration) {
+                var name = getDeclarationName(declaration);
+                if (name) {
+                    var declarations = getDeclarations(name);
+                    declarations.push(declaration);
+                }
+            }
+            function getDeclarations(name) {
+                return ts.getProperty(result, name) || (result[name] = []);
+            }
+            function getDeclarationName(declaration) {
+                if (declaration.name) {
+                    var result_2 = getTextOfIdentifierOrLiteral(declaration.name);
+                    if (result_2 !== undefined) {
+                        return result_2;
+                    }
+                    if (declaration.name.kind === 140 /* ComputedPropertyName */) {
+                        var expr = declaration.name.expression;
+                        if (expr.kind === 172 /* PropertyAccessExpression */) {
+                            return expr.name.text;
+                        }
+                        return getTextOfIdentifierOrLiteral(expr);
+                    }
+                }
+                return undefined;
+            }
+            function getTextOfIdentifierOrLiteral(node) {
+                if (node) {
+                    if (node.kind === 69 /* Identifier */ ||
+                        node.kind === 9 /* StringLiteral */ ||
+                        node.kind === 8 /* NumericLiteral */) {
+                        return node.text;
+                    }
+                }
+                return undefined;
+            }
+            function visit(node) {
+                switch (node.kind) {
+                    case 220 /* FunctionDeclaration */:
+                    case 179 /* FunctionExpression */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        var functionDeclaration = node;
+                        var declarationName = getDeclarationName(functionDeclaration);
+                        if (declarationName) {
+                            var declarations = getDeclarations(declarationName);
+                            var lastDeclaration = ts.lastOrUndefined(declarations);
+                            // Check whether this declaration belongs to an "overload group".
+                            if (lastDeclaration && functionDeclaration.parent === lastDeclaration.parent && functionDeclaration.symbol === lastDeclaration.symbol) {
+                                // Overwrite the last declaration if it was an overload
+                                // and this one is an implementation.
+                                if (functionDeclaration.body && !lastDeclaration.body) {
+                                    declarations[declarations.length - 1] = functionDeclaration;
+                                }
+                            }
+                            else {
+                                declarations.push(functionDeclaration);
+                            }
+                            ts.forEachChild(node, visit);
+                        }
+                        break;
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 223 /* TypeAliasDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 225 /* ModuleDeclaration */:
+                    case 229 /* ImportEqualsDeclaration */:
+                    case 238 /* ExportSpecifier */:
+                    case 234 /* ImportSpecifier */:
+                    case 229 /* ImportEqualsDeclaration */:
+                    case 231 /* ImportClause */:
+                    case 232 /* NamespaceImport */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 159 /* TypeLiteral */:
+                        addDeclaration(node);
+                        ts.forEachChild(node, visit);
+                        break;
+                    case 142 /* Parameter */:
+                        // Only consider parameter properties
+                        if (!(node.flags & 92 /* ParameterPropertyModifier */)) {
+                            break;
+                        }
+                    // fall through
+                    case 218 /* VariableDeclaration */:
+                    case 169 /* BindingElement */: {
+                        var decl = node;
+                        if (ts.isBindingPattern(decl.name)) {
+                            ts.forEachChild(decl.name, visit);
+                            break;
+                        }
+                        if (decl.initializer)
+                            visit(decl.initializer);
+                    }
+                    case 255 /* EnumMember */:
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                        addDeclaration(node);
+                        break;
+                    case 236 /* ExportDeclaration */:
+                        // Handle named exports case e.g.:
+                        //    export {a, b as B} from "mod";
+                        if (node.exportClause) {
+                            ts.forEach(node.exportClause.elements, visit);
+                        }
+                        break;
+                    case 230 /* ImportDeclaration */:
+                        var importClause = node.importClause;
+                        if (importClause) {
+                            // Handle default import case e.g.:
+                            //    import d from "mod";
+                            if (importClause.name) {
+                                addDeclaration(importClause);
+                            }
+                            // Handle named bindings in imports e.g.:
+                            //    import * as NS from "mod";
+                            //    import {a, b as B} from "mod";
+                            if (importClause.namedBindings) {
+                                if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                                    addDeclaration(importClause.namedBindings);
+                                }
+                                else {
+                                    ts.forEach(importClause.namedBindings.elements, visit);
+                                }
+                            }
+                        }
+                        break;
+                    default:
+                        ts.forEachChild(node, visit);
+                }
+            }
+        };
+        return SourceFileObject;
+    }(NodeObject));
+    var TextChange = (function () {
+        function TextChange() {
+        }
+        return TextChange;
+    }());
+    ts.TextChange = TextChange;
+    var HighlightSpanKind;
+    (function (HighlightSpanKind) {
+        HighlightSpanKind.none = "none";
+        HighlightSpanKind.definition = "definition";
+        HighlightSpanKind.reference = "reference";
+        HighlightSpanKind.writtenReference = "writtenReference";
+    })(HighlightSpanKind = ts.HighlightSpanKind || (ts.HighlightSpanKind = {}));
+    (function (IndentStyle) {
+        IndentStyle[IndentStyle["None"] = 0] = "None";
+        IndentStyle[IndentStyle["Block"] = 1] = "Block";
+        IndentStyle[IndentStyle["Smart"] = 2] = "Smart";
+    })(ts.IndentStyle || (ts.IndentStyle = {}));
+    var IndentStyle = ts.IndentStyle;
+    (function (SymbolDisplayPartKind) {
+        SymbolDisplayPartKind[SymbolDisplayPartKind["aliasName"] = 0] = "aliasName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["className"] = 1] = "className";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["enumName"] = 2] = "enumName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["fieldName"] = 3] = "fieldName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["interfaceName"] = 4] = "interfaceName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["keyword"] = 5] = "keyword";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["lineBreak"] = 6] = "lineBreak";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["numericLiteral"] = 7] = "numericLiteral";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["stringLiteral"] = 8] = "stringLiteral";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["localName"] = 9] = "localName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["methodName"] = 10] = "methodName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["moduleName"] = 11] = "moduleName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["operator"] = 12] = "operator";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["parameterName"] = 13] = "parameterName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["propertyName"] = 14] = "propertyName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["punctuation"] = 15] = "punctuation";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["space"] = 16] = "space";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["text"] = 17] = "text";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["typeParameterName"] = 18] = "typeParameterName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["enumMemberName"] = 19] = "enumMemberName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["functionName"] = 20] = "functionName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["regularExpressionLiteral"] = 21] = "regularExpressionLiteral";
+    })(ts.SymbolDisplayPartKind || (ts.SymbolDisplayPartKind = {}));
+    var SymbolDisplayPartKind = ts.SymbolDisplayPartKind;
+    (function (OutputFileType) {
+        OutputFileType[OutputFileType["JavaScript"] = 0] = "JavaScript";
+        OutputFileType[OutputFileType["SourceMap"] = 1] = "SourceMap";
+        OutputFileType[OutputFileType["Declaration"] = 2] = "Declaration";
+    })(ts.OutputFileType || (ts.OutputFileType = {}));
+    var OutputFileType = ts.OutputFileType;
+    (function (EndOfLineState) {
+        EndOfLineState[EndOfLineState["None"] = 0] = "None";
+        EndOfLineState[EndOfLineState["InMultiLineCommentTrivia"] = 1] = "InMultiLineCommentTrivia";
+        EndOfLineState[EndOfLineState["InSingleQuoteStringLiteral"] = 2] = "InSingleQuoteStringLiteral";
+        EndOfLineState[EndOfLineState["InDoubleQuoteStringLiteral"] = 3] = "InDoubleQuoteStringLiteral";
+        EndOfLineState[EndOfLineState["InTemplateHeadOrNoSubstitutionTemplate"] = 4] = "InTemplateHeadOrNoSubstitutionTemplate";
+        EndOfLineState[EndOfLineState["InTemplateMiddleOrTail"] = 5] = "InTemplateMiddleOrTail";
+        EndOfLineState[EndOfLineState["InTemplateSubstitutionPosition"] = 6] = "InTemplateSubstitutionPosition";
+    })(ts.EndOfLineState || (ts.EndOfLineState = {}));
+    var EndOfLineState = ts.EndOfLineState;
+    (function (TokenClass) {
+        TokenClass[TokenClass["Punctuation"] = 0] = "Punctuation";
+        TokenClass[TokenClass["Keyword"] = 1] = "Keyword";
+        TokenClass[TokenClass["Operator"] = 2] = "Operator";
+        TokenClass[TokenClass["Comment"] = 3] = "Comment";
+        TokenClass[TokenClass["Whitespace"] = 4] = "Whitespace";
+        TokenClass[TokenClass["Identifier"] = 5] = "Identifier";
+        TokenClass[TokenClass["NumberLiteral"] = 6] = "NumberLiteral";
+        TokenClass[TokenClass["StringLiteral"] = 7] = "StringLiteral";
+        TokenClass[TokenClass["RegExpLiteral"] = 8] = "RegExpLiteral";
+    })(ts.TokenClass || (ts.TokenClass = {}));
+    var TokenClass = ts.TokenClass;
+    // TODO: move these to enums
+    var ScriptElementKind;
+    (function (ScriptElementKind) {
+        ScriptElementKind.unknown = "";
+        ScriptElementKind.warning = "warning";
+        /** predefined type (void) or keyword (class) */
+        ScriptElementKind.keyword = "keyword";
+        /** top level script node */
+        ScriptElementKind.scriptElement = "script";
+        /** module foo {} */
+        ScriptElementKind.moduleElement = "module";
+        /** class X {} */
+        ScriptElementKind.classElement = "class";
+        /** var x = class X {} */
+        ScriptElementKind.localClassElement = "local class";
+        /** interface Y {} */
+        ScriptElementKind.interfaceElement = "interface";
+        /** type T = ... */
+        ScriptElementKind.typeElement = "type";
+        /** enum E */
+        ScriptElementKind.enumElement = "enum";
+        /**
+         * Inside module and script only
+         * const v = ..
+         */
+        ScriptElementKind.variableElement = "var";
+        /** Inside function */
+        ScriptElementKind.localVariableElement = "local var";
+        /**
+         * Inside module and script only
+         * function f() { }
+         */
+        ScriptElementKind.functionElement = "function";
+        /** Inside function */
+        ScriptElementKind.localFunctionElement = "local function";
+        /** class X { [public|private]* foo() {} } */
+        ScriptElementKind.memberFunctionElement = "method";
+        /** class X { [public|private]* [get|set] foo:number; } */
+        ScriptElementKind.memberGetAccessorElement = "getter";
+        ScriptElementKind.memberSetAccessorElement = "setter";
+        /**
+         * class X { [public|private]* foo:number; }
+         * interface Y { foo:number; }
+         */
+        ScriptElementKind.memberVariableElement = "property";
+        /** class X { constructor() { } } */
+        ScriptElementKind.constructorImplementationElement = "constructor";
+        /** interface Y { ():number; } */
+        ScriptElementKind.callSignatureElement = "call";
+        /** interface Y { []:number; } */
+        ScriptElementKind.indexSignatureElement = "index";
+        /** interface Y { new():Y; } */
+        ScriptElementKind.constructSignatureElement = "construct";
+        /** function foo(*Y*: string) */
+        ScriptElementKind.parameterElement = "parameter";
+        ScriptElementKind.typeParameterElement = "type parameter";
+        ScriptElementKind.primitiveType = "primitive type";
+        ScriptElementKind.label = "label";
+        ScriptElementKind.alias = "alias";
+        ScriptElementKind.constElement = "const";
+        ScriptElementKind.letElement = "let";
+    })(ScriptElementKind = ts.ScriptElementKind || (ts.ScriptElementKind = {}));
+    var ScriptElementKindModifier;
+    (function (ScriptElementKindModifier) {
+        ScriptElementKindModifier.none = "";
+        ScriptElementKindModifier.publicMemberModifier = "public";
+        ScriptElementKindModifier.privateMemberModifier = "private";
+        ScriptElementKindModifier.protectedMemberModifier = "protected";
+        ScriptElementKindModifier.exportedModifier = "export";
+        ScriptElementKindModifier.ambientModifier = "declare";
+        ScriptElementKindModifier.staticModifier = "static";
+        ScriptElementKindModifier.abstractModifier = "abstract";
+    })(ScriptElementKindModifier = ts.ScriptElementKindModifier || (ts.ScriptElementKindModifier = {}));
+    var ClassificationTypeNames = (function () {
+        function ClassificationTypeNames() {
+        }
+        ClassificationTypeNames.comment = "comment";
+        ClassificationTypeNames.identifier = "identifier";
+        ClassificationTypeNames.keyword = "keyword";
+        ClassificationTypeNames.numericLiteral = "number";
+        ClassificationTypeNames.operator = "operator";
+        ClassificationTypeNames.stringLiteral = "string";
+        ClassificationTypeNames.whiteSpace = "whitespace";
+        ClassificationTypeNames.text = "text";
+        ClassificationTypeNames.punctuation = "punctuation";
+        ClassificationTypeNames.className = "class name";
+        ClassificationTypeNames.enumName = "enum name";
+        ClassificationTypeNames.interfaceName = "interface name";
+        ClassificationTypeNames.moduleName = "module name";
+        ClassificationTypeNames.typeParameterName = "type parameter name";
+        ClassificationTypeNames.typeAliasName = "type alias name";
+        ClassificationTypeNames.parameterName = "parameter name";
+        ClassificationTypeNames.docCommentTagName = "doc comment tag name";
+        ClassificationTypeNames.jsxOpenTagName = "jsx open tag name";
+        ClassificationTypeNames.jsxCloseTagName = "jsx close tag name";
+        ClassificationTypeNames.jsxSelfClosingTagName = "jsx self closing tag name";
+        ClassificationTypeNames.jsxAttribute = "jsx attribute";
+        ClassificationTypeNames.jsxText = "jsx text";
+        ClassificationTypeNames.jsxAttributeStringLiteralValue = "jsx attribute string literal value";
+        return ClassificationTypeNames;
+    }());
+    ts.ClassificationTypeNames = ClassificationTypeNames;
+    (function (ClassificationType) {
+        ClassificationType[ClassificationType["comment"] = 1] = "comment";
+        ClassificationType[ClassificationType["identifier"] = 2] = "identifier";
+        ClassificationType[ClassificationType["keyword"] = 3] = "keyword";
+        ClassificationType[ClassificationType["numericLiteral"] = 4] = "numericLiteral";
+        ClassificationType[ClassificationType["operator"] = 5] = "operator";
+        ClassificationType[ClassificationType["stringLiteral"] = 6] = "stringLiteral";
+        ClassificationType[ClassificationType["regularExpressionLiteral"] = 7] = "regularExpressionLiteral";
+        ClassificationType[ClassificationType["whiteSpace"] = 8] = "whiteSpace";
+        ClassificationType[ClassificationType["text"] = 9] = "text";
+        ClassificationType[ClassificationType["punctuation"] = 10] = "punctuation";
+        ClassificationType[ClassificationType["className"] = 11] = "className";
+        ClassificationType[ClassificationType["enumName"] = 12] = "enumName";
+        ClassificationType[ClassificationType["interfaceName"] = 13] = "interfaceName";
+        ClassificationType[ClassificationType["moduleName"] = 14] = "moduleName";
+        ClassificationType[ClassificationType["typeParameterName"] = 15] = "typeParameterName";
+        ClassificationType[ClassificationType["typeAliasName"] = 16] = "typeAliasName";
+        ClassificationType[ClassificationType["parameterName"] = 17] = "parameterName";
+        ClassificationType[ClassificationType["docCommentTagName"] = 18] = "docCommentTagName";
+        ClassificationType[ClassificationType["jsxOpenTagName"] = 19] = "jsxOpenTagName";
+        ClassificationType[ClassificationType["jsxCloseTagName"] = 20] = "jsxCloseTagName";
+        ClassificationType[ClassificationType["jsxSelfClosingTagName"] = 21] = "jsxSelfClosingTagName";
+        ClassificationType[ClassificationType["jsxAttribute"] = 22] = "jsxAttribute";
+        ClassificationType[ClassificationType["jsxText"] = 23] = "jsxText";
+        ClassificationType[ClassificationType["jsxAttributeStringLiteralValue"] = 24] = "jsxAttributeStringLiteralValue";
+    })(ts.ClassificationType || (ts.ClassificationType = {}));
+    var ClassificationType = ts.ClassificationType;
+    function displayPartsToString(displayParts) {
+        if (displayParts) {
+            return ts.map(displayParts, function (displayPart) { return displayPart.text; }).join("");
+        }
+        return "";
+    }
+    ts.displayPartsToString = displayPartsToString;
+    function isLocalVariableOrFunction(symbol) {
+        if (symbol.parent) {
+            return false; // This is exported symbol
+        }
+        return ts.forEach(symbol.declarations, function (declaration) {
+            // Function expressions are local
+            if (declaration.kind === 179 /* FunctionExpression */) {
+                return true;
+            }
+            if (declaration.kind !== 218 /* VariableDeclaration */ && declaration.kind !== 220 /* FunctionDeclaration */) {
+                return false;
+            }
+            // If the parent is not sourceFile or module block it is local variable
+            for (var parent_15 = declaration.parent; !ts.isFunctionBlock(parent_15); parent_15 = parent_15.parent) {
+                // Reached source file or module block
+                if (parent_15.kind === 256 /* SourceFile */ || parent_15.kind === 226 /* ModuleBlock */) {
+                    return false;
+                }
+            }
+            // parent is in function block
+            return true;
+        });
+    }
+    function getDefaultCompilerOptions() {
+        // Always default to "ScriptTarget.ES5" for the language service
+        return {
+            target: 1 /* ES5 */,
+            jsx: 1 /* Preserve */
+        };
+    }
+    ts.getDefaultCompilerOptions = getDefaultCompilerOptions;
+    // Cache host information about scrip Should be refreshed
+    // at each language service public entry point, since we don't know when
+    // set of scripts handled by the host changes.
+    var HostCache = (function () {
+        function HostCache(host, getCanonicalFileName) {
+            this.host = host;
+            this.getCanonicalFileName = getCanonicalFileName;
+            // script id => script index
+            this.currentDirectory = host.getCurrentDirectory();
+            this.fileNameToEntry = ts.createFileMap();
+            // Initialize the list with the root file names
+            var rootFileNames = host.getScriptFileNames();
+            for (var _i = 0, rootFileNames_1 = rootFileNames; _i < rootFileNames_1.length; _i++) {
+                var fileName = rootFileNames_1[_i];
+                this.createEntry(fileName, ts.toPath(fileName, this.currentDirectory, getCanonicalFileName));
+            }
+            // store the compilation settings
+            this._compilationSettings = host.getCompilationSettings() || getDefaultCompilerOptions();
+        }
+        HostCache.prototype.compilationSettings = function () {
+            return this._compilationSettings;
+        };
+        HostCache.prototype.createEntry = function (fileName, path) {
+            var entry;
+            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
+            if (scriptSnapshot) {
+                entry = {
+                    hostFileName: fileName,
+                    version: this.host.getScriptVersion(fileName),
+                    scriptSnapshot: scriptSnapshot,
+                    scriptKind: ts.getScriptKind(fileName, this.host)
+                };
+            }
+            this.fileNameToEntry.set(path, entry);
+            return entry;
+        };
+        HostCache.prototype.getEntry = function (path) {
+            return this.fileNameToEntry.get(path);
+        };
+        HostCache.prototype.contains = function (path) {
+            return this.fileNameToEntry.contains(path);
+        };
+        HostCache.prototype.getOrCreateEntry = function (fileName) {
+            var path = ts.toPath(fileName, this.currentDirectory, this.getCanonicalFileName);
+            return this.getOrCreateEntryByPath(fileName, path);
+        };
+        HostCache.prototype.getOrCreateEntryByPath = function (fileName, path) {
+            return this.contains(path)
+                ? this.getEntry(path)
+                : this.createEntry(fileName, path);
+        };
+        HostCache.prototype.getRootFileNames = function () {
+            var fileNames = [];
+            this.fileNameToEntry.forEachValue(function (path, value) {
+                if (value) {
+                    fileNames.push(value.hostFileName);
+                }
+            });
+            return fileNames;
+        };
+        HostCache.prototype.getVersion = function (path) {
+            var file = this.getEntry(path);
+            return file && file.version;
+        };
+        HostCache.prototype.getScriptSnapshot = function (path) {
+            var file = this.getEntry(path);
+            return file && file.scriptSnapshot;
+        };
+        return HostCache;
+    }());
+    var SyntaxTreeCache = (function () {
+        function SyntaxTreeCache(host) {
+            this.host = host;
+        }
+        SyntaxTreeCache.prototype.getCurrentSourceFile = function (fileName) {
+            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
+            if (!scriptSnapshot) {
+                // The host does not know about this file.
+                throw new Error("Could not find file: '" + fileName + "'.");
+            }
+            var scriptKind = ts.getScriptKind(fileName, this.host);
+            var version = this.host.getScriptVersion(fileName);
+            var sourceFile;
+            if (this.currentFileName !== fileName) {
+                // This is a new file, just parse it
+                sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, 2 /* Latest */, version, /*setNodeParents*/ true, scriptKind);
+            }
+            else if (this.currentFileVersion !== version) {
+                // This is the same file, just a newer version. Incrementally parse the file.
+                var editRange = scriptSnapshot.getChangeRange(this.currentFileScriptSnapshot);
+                sourceFile = updateLanguageServiceSourceFile(this.currentSourceFile, scriptSnapshot, version, editRange);
+            }
+            if (sourceFile) {
+                // All done, ensure state is up to date
+                this.currentFileVersion = version;
+                this.currentFileName = fileName;
+                this.currentFileScriptSnapshot = scriptSnapshot;
+                this.currentSourceFile = sourceFile;
+            }
+            return this.currentSourceFile;
+        };
+        return SyntaxTreeCache;
+    }());
+    function setSourceFileFields(sourceFile, scriptSnapshot, version) {
+        sourceFile.version = version;
+        sourceFile.scriptSnapshot = scriptSnapshot;
+    }
+    var commandLineOptions_stringToEnum;
+    /** JS users may pass in string values for enum compiler options (such as ModuleKind), so convert. */
+    function fixupCompilerOptions(options, diagnostics) {
+        // Lazily create this value to fix module loading errors.
+        commandLineOptions_stringToEnum = commandLineOptions_stringToEnum || ts.filter(ts.optionDeclarations, function (o) {
+            return typeof o.type === "object" && !ts.forEachValue(o.type, function (v) { return typeof v !== "number"; });
+        });
+        options = ts.clone(options);
+        var _loop_2 = function(opt) {
+            if (!ts.hasProperty(options, opt.name)) {
+                return "continue";
+            }
+            var value = options[opt.name];
+            // Value should be a key of opt.type
+            if (typeof value === "string") {
+                // If value is not a string, this will fail
+                options[opt.name] = ts.parseCustomTypeOption(opt, value, diagnostics);
+            }
+            else {
+                if (!ts.forEachValue(opt.type, function (v) { return v === value; })) {
+                    // Supplied value isn't a valid enum value.
+                    diagnostics.push(ts.createCompilerDiagnosticForInvalidCustomType(opt));
+                }
+            }
+        };
+        for (var _i = 0, commandLineOptions_stringToEnum_1 = commandLineOptions_stringToEnum; _i < commandLineOptions_stringToEnum_1.length; _i++) {
+            var opt = commandLineOptions_stringToEnum_1[_i];
+            _loop_2(opt);
+        }
+        return options;
+    }
+    /*
+     * This function will compile source text from 'input' argument using specified compiler options.
+     * If not options are provided - it will use a set of default compiler options.
+     * Extra compiler options that will unconditionally be used by this function are:
+     * - isolatedModules = true
+     * - allowNonTsExtensions = true
+     * - noLib = true
+     * - noResolve = true
+     */
+    function transpileModule(input, transpileOptions) {
+        var diagnostics = [];
+        var options = transpileOptions.compilerOptions ? fixupCompilerOptions(transpileOptions.compilerOptions, diagnostics) : getDefaultCompilerOptions();
+        options.isolatedModules = true;
+        // transpileModule does not write anything to disk so there is no need to verify that there are no conflicts between input and output paths.
+        options.suppressOutputPathCheck = true;
+        // Filename can be non-ts file.
+        options.allowNonTsExtensions = true;
+        // We are not returning a sourceFile for lib file when asked by the program,
+        // so pass --noLib to avoid reporting a file not found error.
+        options.noLib = true;
+        // We are not doing a full typecheck, we are not resolving the whole context,
+        // so pass --noResolve to avoid reporting missing file errors.
+        options.noResolve = true;
+        // if jsx is specified then treat file as .tsx
+        var inputFileName = transpileOptions.fileName || (options.jsx ? "module.tsx" : "module.ts");
+        var sourceFile = ts.createSourceFile(inputFileName, input, options.target);
+        if (transpileOptions.moduleName) {
+            sourceFile.moduleName = transpileOptions.moduleName;
+        }
+        sourceFile.renamedDependencies = transpileOptions.renamedDependencies;
+        var newLine = ts.getNewLineCharacter(options);
+        // Output
+        var outputText;
+        var sourceMapText;
+        // Create a compilerHost object to allow the compiler to read and write files
+        var compilerHost = {
+            getSourceFile: function (fileName, target) { return fileName === ts.normalizePath(inputFileName) ? sourceFile : undefined; },
+            writeFile: function (name, text, writeByteOrderMark) {
+                if (ts.fileExtensionIs(name, ".map")) {
+                    ts.Debug.assert(sourceMapText === undefined, "Unexpected multiple source map outputs for the file '" + name + "'");
+                    sourceMapText = text;
+                }
+                else {
+                    ts.Debug.assert(outputText === undefined, "Unexpected multiple outputs for the file: '" + name + "'");
+                    outputText = text;
+                }
+            },
+            getDefaultLibFileName: function () { return "lib.d.ts"; },
+            useCaseSensitiveFileNames: function () { return false; },
+            getCanonicalFileName: function (fileName) { return fileName; },
+            getCurrentDirectory: function () { return ""; },
+            getNewLine: function () { return newLine; },
+            fileExists: function (fileName) { return fileName === inputFileName; },
+            readFile: function (fileName) { return ""; },
+            directoryExists: function (directoryExists) { return true; }
+        };
+        var program = ts.createProgram([inputFileName], options, compilerHost);
+        if (transpileOptions.reportDiagnostics) {
+            ts.addRange(/*to*/ diagnostics, /*from*/ program.getSyntacticDiagnostics(sourceFile));
+            ts.addRange(/*to*/ diagnostics, /*from*/ program.getOptionsDiagnostics());
+        }
+        // Emit
+        program.emit();
+        ts.Debug.assert(outputText !== undefined, "Output generation failed");
+        return { outputText: outputText, diagnostics: diagnostics, sourceMapText: sourceMapText };
+    }
+    ts.transpileModule = transpileModule;
+    /*
+     * This is a shortcut function for transpileModule - it accepts transpileOptions as parameters and returns only outputText part of the result.
+     */
+    function transpile(input, compilerOptions, fileName, diagnostics, moduleName) {
+        var output = transpileModule(input, { compilerOptions: compilerOptions, fileName: fileName, reportDiagnostics: !!diagnostics, moduleName: moduleName });
+        // addRange correctly handles cases when wither 'from' or 'to' argument is missing
+        ts.addRange(diagnostics, output.diagnostics);
+        return output.outputText;
+    }
+    ts.transpile = transpile;
+    function createLanguageServiceSourceFile(fileName, scriptSnapshot, scriptTarget, version, setNodeParents, scriptKind) {
+        var text = scriptSnapshot.getText(0, scriptSnapshot.getLength());
+        var sourceFile = ts.createSourceFile(fileName, text, scriptTarget, setNodeParents, scriptKind);
+        setSourceFileFields(sourceFile, scriptSnapshot, version);
+        return sourceFile;
+    }
+    ts.createLanguageServiceSourceFile = createLanguageServiceSourceFile;
+    ts.disableIncrementalParsing = false;
+    function updateLanguageServiceSourceFile(sourceFile, scriptSnapshot, version, textChangeRange, aggressiveChecks) {
+        // If we were given a text change range, and our version or open-ness changed, then
+        // incrementally parse this file.
+        if (textChangeRange) {
+            if (version !== sourceFile.version) {
+                // Once incremental parsing is ready, then just call into this function.
+                if (!ts.disableIncrementalParsing) {
+                    var newText = void 0;
+                    // grab the fragment from the beginning of the original text to the beginning of the span
+                    var prefix = textChangeRange.span.start !== 0
+                        ? sourceFile.text.substr(0, textChangeRange.span.start)
+                        : "";
+                    // grab the fragment from the end of the span till the end of the original text
+                    var suffix = ts.textSpanEnd(textChangeRange.span) !== sourceFile.text.length
+                        ? sourceFile.text.substr(ts.textSpanEnd(textChangeRange.span))
+                        : "";
+                    if (textChangeRange.newLength === 0) {
+                        // edit was a deletion - just combine prefix and suffix
+                        newText = prefix && suffix ? prefix + suffix : prefix || suffix;
+                    }
+                    else {
+                        // it was actual edit, fetch the fragment of new text that correspond to new span
+                        var changedText = scriptSnapshot.getText(textChangeRange.span.start, textChangeRange.span.start + textChangeRange.newLength);
+                        // combine prefix, changed text and suffix
+                        newText = prefix && suffix
+                            ? prefix + changedText + suffix
+                            : prefix
+                                ? (prefix + changedText)
+                                : (changedText + suffix);
+                    }
+                    var newSourceFile = ts.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
+                    setSourceFileFields(newSourceFile, scriptSnapshot, version);
+                    // after incremental parsing nameTable might not be up-to-date
+                    // drop it so it can be lazily recreated later
+                    newSourceFile.nameTable = undefined;
+                    // dispose all resources held by old script snapshot
+                    if (sourceFile !== newSourceFile && sourceFile.scriptSnapshot) {
+                        if (sourceFile.scriptSnapshot.dispose) {
+                            sourceFile.scriptSnapshot.dispose();
+                        }
+                        sourceFile.scriptSnapshot = undefined;
+                    }
+                    return newSourceFile;
+                }
+            }
+        }
+        // Otherwise, just create a new source file.
+        return createLanguageServiceSourceFile(sourceFile.fileName, scriptSnapshot, sourceFile.languageVersion, version, /*setNodeParents*/ true, sourceFile.scriptKind);
+    }
+    ts.updateLanguageServiceSourceFile = updateLanguageServiceSourceFile;
+    function createDocumentRegistry(useCaseSensitiveFileNames, currentDirectory) {
+        if (currentDirectory === void 0) { currentDirectory = ""; }
+        // Maps from compiler setting target (ES3, ES5, etc.) to all the cached documents we have
+        // for those settings.
+        var buckets = {};
+        var getCanonicalFileName = ts.createGetCanonicalFileName(!!useCaseSensitiveFileNames);
+        function getKeyForCompilationSettings(settings) {
+            return ("_" + settings.target + "|" + settings.module + "|" + settings.noResolve + "|" + settings.jsx + "|" + settings.allowJs + "|" + settings.baseUrl + "|" + settings.typesRoot + "|" + settings.typesSearchPaths + "|" + JSON.stringify(settings.rootDirs) + "|" + JSON.stringify(settings.paths));
+        }
+        function getBucketForCompilationSettings(key, createIfMissing) {
+            var bucket = ts.lookUp(buckets, key);
+            if (!bucket && createIfMissing) {
+                buckets[key] = bucket = ts.createFileMap();
+            }
+            return bucket;
+        }
+        function reportStats() {
+            var bucketInfoArray = Object.keys(buckets).filter(function (name) { return name && name.charAt(0) === "_"; }).map(function (name) {
+                var entries = ts.lookUp(buckets, name);
+                var sourceFiles = [];
+                entries.forEachValue(function (key, entry) {
+                    sourceFiles.push({
+                        name: key,
+                        refCount: entry.languageServiceRefCount,
+                        references: entry.owners.slice(0)
+                    });
+                });
+                sourceFiles.sort(function (x, y) { return y.refCount - x.refCount; });
+                return {
+                    bucket: name,
+                    sourceFiles: sourceFiles
+                };
+            });
+            return JSON.stringify(bucketInfoArray, undefined, 2);
+        }
+        function acquireDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        }
+        function acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
+            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ true, scriptKind);
+        }
+        function updateDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        }
+        function updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
+            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ false, scriptKind);
+        }
+        function acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, acquiring, scriptKind) {
+            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ true);
+            var entry = bucket.get(path);
+            if (!entry) {
+                ts.Debug.assert(acquiring, "How could we be trying to update a document that the registry doesn't have?");
+                // Have never seen this file with these settings.  Create a new source file for it.
+                var sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, compilationSettings.target, version, /*setNodeParents*/ false, scriptKind);
+                entry = {
+                    sourceFile: sourceFile,
+                    languageServiceRefCount: 0,
+                    owners: []
+                };
+                bucket.set(path, entry);
+            }
+            else {
+                // We have an entry for this file.  However, it may be for a different version of
+                // the script snapshot.  If so, update it appropriately.  Otherwise, we can just
+                // return it as is.
+                if (entry.sourceFile.version !== version) {
+                    entry.sourceFile = updateLanguageServiceSourceFile(entry.sourceFile, scriptSnapshot, version, scriptSnapshot.getChangeRange(entry.sourceFile.scriptSnapshot));
+                }
+            }
+            // If we're acquiring, then this is the first time this LS is asking for this document.
+            // Increase our ref count so we know there's another LS using the document.  If we're
+            // not acquiring, then that means the LS is 'updating' the file instead, and that means
+            // it has already acquired the document previously.  As such, we do not need to increase
+            // the ref count.
+            if (acquiring) {
+                entry.languageServiceRefCount++;
+            }
+            return entry.sourceFile;
+        }
+        function releaseDocument(fileName, compilationSettings) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return releaseDocumentWithKey(path, key);
+        }
+        function releaseDocumentWithKey(path, key) {
+            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ false);
+            ts.Debug.assert(bucket !== undefined);
+            var entry = bucket.get(path);
+            entry.languageServiceRefCount--;
+            ts.Debug.assert(entry.languageServiceRefCount >= 0);
+            if (entry.languageServiceRefCount === 0) {
+                bucket.remove(path);
+            }
+        }
+        return {
+            acquireDocument: acquireDocument,
+            acquireDocumentWithKey: acquireDocumentWithKey,
+            updateDocument: updateDocument,
+            updateDocumentWithKey: updateDocumentWithKey,
+            releaseDocument: releaseDocument,
+            releaseDocumentWithKey: releaseDocumentWithKey,
+            reportStats: reportStats,
+            getKeyForCompilationSettings: getKeyForCompilationSettings
+        };
+    }
+    ts.createDocumentRegistry = createDocumentRegistry;
+    function preProcessFile(sourceText, readImportFiles, detectJavaScriptImports) {
+        if (readImportFiles === void 0) { readImportFiles = true; }
+        if (detectJavaScriptImports === void 0) { detectJavaScriptImports = false; }
+        var referencedFiles = [];
+        var typeReferenceDirectives = [];
+        var importedFiles = [];
+        var ambientExternalModules;
+        var isNoDefaultLib = false;
+        var braceNesting = 0;
+        // assume that text represent an external module if it contains at least one top level import/export
+        // ambient modules that are found inside external modules are interpreted as module augmentations
+        var externalModule = false;
+        function nextToken() {
+            var token = scanner.scan();
+            if (token === 15 /* OpenBraceToken */) {
+                braceNesting++;
+            }
+            else if (token === 16 /* CloseBraceToken */) {
+                braceNesting--;
+            }
+            return token;
+        }
+        function processTripleSlashDirectives() {
+            var commentRanges = ts.getLeadingCommentRanges(sourceText, 0);
+            ts.forEach(commentRanges, function (commentRange) {
+                var comment = sourceText.substring(commentRange.pos, commentRange.end);
+                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, commentRange);
+                if (referencePathMatchResult) {
+                    isNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
+                    var fileReference = referencePathMatchResult.fileReference;
+                    if (fileReference) {
+                        var collection = referencePathMatchResult.isTypeReferenceDirective
+                            ? typeReferenceDirectives
+                            : referencedFiles;
+                        collection.push(fileReference);
+                    }
+                }
+            });
+        }
+        function getFileReference() {
+            var file = scanner.getTokenValue();
+            var pos = scanner.getTokenPos();
+            return {
+                fileName: file,
+                pos: pos,
+                end: pos + file.length
+            };
+        }
+        function recordAmbientExternalModule() {
+            if (!ambientExternalModules) {
+                ambientExternalModules = [];
+            }
+            ambientExternalModules.push({ ref: getFileReference(), depth: braceNesting });
+        }
+        function recordModuleName() {
+            importedFiles.push(getFileReference());
+            markAsExternalModuleIfTopLevel();
+        }
+        function markAsExternalModuleIfTopLevel() {
+            if (braceNesting === 0) {
+                externalModule = true;
+            }
+        }
+        /**
+         * Returns true if at least one token was consumed from the stream
+         */
+        function tryConsumeDeclare() {
+            var token = scanner.getToken();
+            if (token === 122 /* DeclareKeyword */) {
+                // declare module "mod"
+                token = nextToken();
+                if (token === 125 /* ModuleKeyword */) {
+                    token = nextToken();
+                    if (token === 9 /* StringLiteral */) {
+                        recordAmbientExternalModule();
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        /**
+         * Returns true if at least one token was consumed from the stream
+         */
+        function tryConsumeImport() {
+            var token = scanner.getToken();
+            if (token === 89 /* ImportKeyword */) {
+                token = nextToken();
+                if (token === 9 /* StringLiteral */) {
+                    // import "mod";
+                    recordModuleName();
+                    return true;
+                }
+                else {
+                    if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
+                        token = nextToken();
+                        if (token === 136 /* FromKeyword */) {
+                            token = nextToken();
+                            if (token === 9 /* StringLiteral */) {
+                                // import d from "mod";
+                                recordModuleName();
+                                return true;
+                            }
+                        }
+                        else if (token === 56 /* EqualsToken */) {
+                            if (tryConsumeRequireCall(/*skipCurrentToken*/ true)) {
+                                return true;
+                            }
+                        }
+                        else if (token === 24 /* CommaToken */) {
+                            // consume comma and keep going
+                            token = nextToken();
+                        }
+                        else {
+                            // unknown syntax
+                            return true;
+                        }
+                    }
+                    if (token === 15 /* OpenBraceToken */) {
+                        token = nextToken();
+                        // consume "{ a as B, c, d as D}" clauses
+                        // make sure that it stops on EOF
+                        while (token !== 16 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
+                            token = nextToken();
+                        }
+                        if (token === 16 /* CloseBraceToken */) {
+                            token = nextToken();
+                            if (token === 136 /* FromKeyword */) {
+                                token = nextToken();
+                                if (token === 9 /* StringLiteral */) {
+                                    // import {a as A} from "mod";
+                                    // import d, {a, b as B} from "mod"
+                                    recordModuleName();
+                                }
+                            }
+                        }
+                    }
+                    else if (token === 37 /* AsteriskToken */) {
+                        token = nextToken();
+                        if (token === 116 /* AsKeyword */) {
+                            token = nextToken();
+                            if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
+                                token = nextToken();
+                                if (token === 136 /* FromKeyword */) {
+                                    token = nextToken();
+                                    if (token === 9 /* StringLiteral */) {
+                                        // import * as NS from "mod"
+                                        // import d, * as NS from "mod"
+                                        recordModuleName();
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeExport() {
+            var token = scanner.getToken();
+            if (token === 82 /* ExportKeyword */) {
+                markAsExternalModuleIfTopLevel();
+                token = nextToken();
+                if (token === 15 /* OpenBraceToken */) {
+                    token = nextToken();
+                    // consume "{ a as B, c, d as D}" clauses
+                    // make sure it stops on EOF
+                    while (token !== 16 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
+                        token = nextToken();
+                    }
+                    if (token === 16 /* CloseBraceToken */) {
+                        token = nextToken();
+                        if (token === 136 /* FromKeyword */) {
+                            token = nextToken();
+                            if (token === 9 /* StringLiteral */) {
+                                // export {a as A} from "mod";
+                                // export {a, b as B} from "mod"
+                                recordModuleName();
+                            }
+                        }
+                    }
+                }
+                else if (token === 37 /* AsteriskToken */) {
+                    token = nextToken();
+                    if (token === 136 /* FromKeyword */) {
+                        token = nextToken();
+                        if (token === 9 /* StringLiteral */) {
+                            // export * from "mod"
+                            recordModuleName();
+                        }
+                    }
+                }
+                else if (token === 89 /* ImportKeyword */) {
+                    token = nextToken();
+                    if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
+                        token = nextToken();
+                        if (token === 56 /* EqualsToken */) {
+                            if (tryConsumeRequireCall(/*skipCurrentToken*/ true)) {
+                                return true;
+                            }
+                        }
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeRequireCall(skipCurrentToken) {
+            var token = skipCurrentToken ? nextToken() : scanner.getToken();
+            if (token === 129 /* RequireKeyword */) {
+                token = nextToken();
+                if (token === 17 /* OpenParenToken */) {
+                    token = nextToken();
+                    if (token === 9 /* StringLiteral */) {
+                        //  require("mod");
+                        recordModuleName();
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeDefine() {
+            var token = scanner.getToken();
+            if (token === 69 /* Identifier */ && scanner.getTokenValue() === "define") {
+                token = nextToken();
+                if (token !== 17 /* OpenParenToken */) {
+                    return true;
+                }
+                token = nextToken();
+                if (token === 9 /* StringLiteral */) {
+                    // looks like define ("modname", ... - skip string literal and comma
+                    token = nextToken();
+                    if (token === 24 /* CommaToken */) {
+                        token = nextToken();
+                    }
+                    else {
+                        // unexpected token
+                        return true;
+                    }
+                }
+                // should be start of dependency list
+                if (token !== 19 /* OpenBracketToken */) {
+                    return true;
+                }
+                // skip open bracket
+                token = nextToken();
+                var i = 0;
+                // scan until ']' or EOF
+                while (token !== 20 /* CloseBracketToken */ && token !== 1 /* EndOfFileToken */) {
+                    // record string literals as module names
+                    if (token === 9 /* StringLiteral */) {
+                        recordModuleName();
+                        i++;
+                    }
+                    token = nextToken();
+                }
+                return true;
+            }
+            return false;
+        }
+        function processImports() {
+            scanner.setText(sourceText);
+            nextToken();
+            // Look for:
+            //    import "mod";
+            //    import d from "mod"
+            //    import {a as A } from "mod";
+            //    import * as NS  from "mod"
+            //    import d, {a, b as B} from "mod"
+            //    import i = require("mod");
+            //
+            //    export * from "mod"
+            //    export {a as b} from "mod"
+            //    export import i = require("mod")
+            //    (for JavaScript files) require("mod")
+            while (true) {
+                if (scanner.getToken() === 1 /* EndOfFileToken */) {
+                    break;
+                }
+                // check if at least one of alternative have moved scanner forward
+                if (tryConsumeDeclare() ||
+                    tryConsumeImport() ||
+                    tryConsumeExport() ||
+                    (detectJavaScriptImports && (tryConsumeRequireCall(/*skipCurrentToken*/ false) || tryConsumeDefine()))) {
+                    continue;
+                }
+                else {
+                    nextToken();
+                }
+            }
+            scanner.setText(undefined);
+        }
+        if (readImportFiles) {
+            processImports();
+        }
+        processTripleSlashDirectives();
+        if (externalModule) {
+            // for external modules module all nested ambient modules are augmentations
+            if (ambientExternalModules) {
+                // move all detected ambient modules to imported files since they need to be resolved
+                for (var _i = 0, ambientExternalModules_1 = ambientExternalModules; _i < ambientExternalModules_1.length; _i++) {
+                    var decl = ambientExternalModules_1[_i];
+                    importedFiles.push(decl.ref);
+                }
+            }
+            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: undefined };
+        }
+        else {
+            // for global scripts ambient modules still can have augmentations - look for ambient modules with depth > 0
+            var ambientModuleNames = void 0;
+            if (ambientExternalModules) {
+                for (var _a = 0, ambientExternalModules_2 = ambientExternalModules; _a < ambientExternalModules_2.length; _a++) {
+                    var decl = ambientExternalModules_2[_a];
+                    if (decl.depth === 0) {
+                        if (!ambientModuleNames) {
+                            ambientModuleNames = [];
+                        }
+                        ambientModuleNames.push(decl.ref.fileName);
+                    }
+                    else {
+                        importedFiles.push(decl.ref);
+                    }
+                }
+            }
+            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: ambientModuleNames };
+        }
+    }
+    ts.preProcessFile = preProcessFile;
+    /// Helpers
+    function getTargetLabel(referenceNode, labelName) {
+        while (referenceNode) {
+            if (referenceNode.kind === 214 /* LabeledStatement */ && referenceNode.label.text === labelName) {
+                return referenceNode.label;
+            }
+            referenceNode = referenceNode.parent;
+        }
+        return undefined;
+    }
+    function isJumpStatementTarget(node) {
+        return node.kind === 69 /* Identifier */ &&
+            (node.parent.kind === 210 /* BreakStatement */ || node.parent.kind === 209 /* ContinueStatement */) &&
+            node.parent.label === node;
+    }
+    function isLabelOfLabeledStatement(node) {
+        return node.kind === 69 /* Identifier */ &&
+            node.parent.kind === 214 /* LabeledStatement */ &&
+            node.parent.label === node;
+    }
+    /**
+     * Whether or not a 'node' is preceded by a label of the given string.
+     * Note: 'node' cannot be a SourceFile.
+     */
+    function isLabeledBy(node, labelName) {
+        for (var owner = node.parent; owner.kind === 214 /* LabeledStatement */; owner = owner.parent) {
+            if (owner.label.text === labelName) {
+                return true;
+            }
+        }
+        return false;
+    }
+    function isLabelName(node) {
+        return isLabelOfLabeledStatement(node) || isJumpStatementTarget(node);
+    }
+    function isRightSideOfQualifiedName(node) {
+        return node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node;
+    }
+    function isRightSideOfPropertyAccess(node) {
+        return node && node.parent && node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node;
+    }
+    function isCallExpressionTarget(node) {
+        if (isRightSideOfPropertyAccess(node)) {
+            node = node.parent;
+        }
+        return node && node.parent && node.parent.kind === 174 /* CallExpression */ && node.parent.expression === node;
+    }
+    function isNewExpressionTarget(node) {
+        if (isRightSideOfPropertyAccess(node)) {
+            node = node.parent;
+        }
+        return node && node.parent && node.parent.kind === 175 /* NewExpression */ && node.parent.expression === node;
+    }
+    function isNameOfModuleDeclaration(node) {
+        return node.parent.kind === 225 /* ModuleDeclaration */ && node.parent.name === node;
+    }
+    function isNameOfFunctionDeclaration(node) {
+        return node.kind === 69 /* Identifier */ &&
+            ts.isFunctionLike(node.parent) && node.parent.name === node;
+    }
+    function isObjectLiteralPropertyDeclaration(node) {
+        switch (node.kind) {
+            case 253 /* PropertyAssignment */:
+            case 254 /* ShorthandPropertyAssignment */:
+            case 147 /* MethodDeclaration */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+                return true;
+        }
+        return false;
+    }
+    /**
+     * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
+     */
+    function getContainingObjectLiteralElement(node) {
+        switch (node.kind) {
+            case 9 /* StringLiteral */:
+            case 8 /* NumericLiteral */:
+                if (node.parent.kind === 140 /* ComputedPropertyName */) {
+                    return isObjectLiteralPropertyDeclaration(node.parent.parent) ? node.parent.parent : undefined;
+                }
+            // intential fall through
+            case 69 /* Identifier */:
+                return isObjectLiteralPropertyDeclaration(node.parent) && node.parent.name === node ? node.parent : undefined;
+        }
+        return undefined;
+    }
+    function isLiteralNameOfPropertyDeclarationOrIndexAccess(node) {
+        if (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) {
+            switch (node.parent.kind) {
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 253 /* PropertyAssignment */:
+                case 255 /* EnumMember */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 225 /* ModuleDeclaration */:
+                    return node.parent.name === node;
+                case 173 /* ElementAccessExpression */:
+                    return node.parent.argumentExpression === node;
+                case 140 /* ComputedPropertyName */:
+                    return true;
+            }
+        }
+        return false;
+    }
+    function isNameOfExternalModuleImportOrDeclaration(node) {
+        if (node.kind === 9 /* StringLiteral */) {
+            return isNameOfModuleDeclaration(node) ||
+                (ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) && ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node);
+        }
+        return false;
+    }
+    /** Returns true if the position is within a comment */
+    function isInsideComment(sourceFile, token, position) {
+        // The position has to be: 1. in the leading trivia (before token.getStart()), and 2. within a comment
+        return position <= token.getStart(sourceFile) &&
+            (isInsideCommentRange(ts.getTrailingCommentRanges(sourceFile.text, token.getFullStart())) ||
+                isInsideCommentRange(ts.getLeadingCommentRanges(sourceFile.text, token.getFullStart())));
+        function isInsideCommentRange(comments) {
+            return ts.forEach(comments, function (comment) {
+                // either we are 1. completely inside the comment, or 2. at the end of the comment
+                if (comment.pos < position && position < comment.end) {
+                    return true;
+                }
+                else if (position === comment.end) {
+                    var text = sourceFile.text;
+                    var width = comment.end - comment.pos;
+                    // is single line comment or just /*
+                    if (width <= 2 || text.charCodeAt(comment.pos + 1) === 47 /* slash */) {
+                        return true;
+                    }
+                    else {
+                        // is unterminated multi-line comment
+                        return !(text.charCodeAt(comment.end - 1) === 47 /* slash */ &&
+                            text.charCodeAt(comment.end - 2) === 42 /* asterisk */);
+                    }
+                }
+                return false;
+            });
+        }
+    }
+    var SemanticMeaning;
+    (function (SemanticMeaning) {
+        SemanticMeaning[SemanticMeaning["None"] = 0] = "None";
+        SemanticMeaning[SemanticMeaning["Value"] = 1] = "Value";
+        SemanticMeaning[SemanticMeaning["Type"] = 2] = "Type";
+        SemanticMeaning[SemanticMeaning["Namespace"] = 4] = "Namespace";
+        SemanticMeaning[SemanticMeaning["All"] = 7] = "All";
+    })(SemanticMeaning || (SemanticMeaning = {}));
+    var BreakContinueSearchType;
+    (function (BreakContinueSearchType) {
+        BreakContinueSearchType[BreakContinueSearchType["None"] = 0] = "None";
+        BreakContinueSearchType[BreakContinueSearchType["Unlabeled"] = 1] = "Unlabeled";
+        BreakContinueSearchType[BreakContinueSearchType["Labeled"] = 2] = "Labeled";
+        BreakContinueSearchType[BreakContinueSearchType["All"] = 3] = "All";
+    })(BreakContinueSearchType || (BreakContinueSearchType = {}));
+    // A cache of completion entries for keywords, these do not change between sessions
+    var keywordCompletions = [];
+    for (var i = 70 /* FirstKeyword */; i <= 138 /* LastKeyword */; i++) {
+        keywordCompletions.push({
+            name: ts.tokenToString(i),
+            kind: ScriptElementKind.keyword,
+            kindModifiers: ScriptElementKindModifier.none,
+            sortText: "0"
+        });
+    }
+    /* @internal */ function getContainerNode(node) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return undefined;
+            }
+            switch (node.kind) {
+                case 256 /* SourceFile */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 221 /* ClassDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 224 /* EnumDeclaration */:
+                case 225 /* ModuleDeclaration */:
+                    return node;
+            }
+        }
+    }
+    ts.getContainerNode = getContainerNode;
+    /* @internal */ function getNodeKind(node) {
+        switch (node.kind) {
+            case 225 /* ModuleDeclaration */: return ScriptElementKind.moduleElement;
+            case 221 /* ClassDeclaration */:
+            case 192 /* ClassExpression */:
+                return ScriptElementKind.classElement;
+            case 222 /* InterfaceDeclaration */: return ScriptElementKind.interfaceElement;
+            case 223 /* TypeAliasDeclaration */: return ScriptElementKind.typeElement;
+            case 224 /* EnumDeclaration */: return ScriptElementKind.enumElement;
+            case 218 /* VariableDeclaration */:
+                return ts.isConst(node)
+                    ? ScriptElementKind.constElement
+                    : ts.isLet(node)
+                        ? ScriptElementKind.letElement
+                        : ScriptElementKind.variableElement;
+            case 220 /* FunctionDeclaration */:
+            case 179 /* FunctionExpression */:
+                return ScriptElementKind.functionElement;
+            case 149 /* GetAccessor */: return ScriptElementKind.memberGetAccessorElement;
+            case 150 /* SetAccessor */: return ScriptElementKind.memberSetAccessorElement;
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+                return ScriptElementKind.memberFunctionElement;
+            case 145 /* PropertyDeclaration */:
+            case 144 /* PropertySignature */:
+                return ScriptElementKind.memberVariableElement;
+            case 153 /* IndexSignature */: return ScriptElementKind.indexSignatureElement;
+            case 152 /* ConstructSignature */: return ScriptElementKind.constructSignatureElement;
+            case 151 /* CallSignature */: return ScriptElementKind.callSignatureElement;
+            case 148 /* Constructor */: return ScriptElementKind.constructorImplementationElement;
+            case 141 /* TypeParameter */: return ScriptElementKind.typeParameterElement;
+            case 255 /* EnumMember */: return ScriptElementKind.variableElement;
+            case 142 /* Parameter */: return (node.flags & 92 /* ParameterPropertyModifier */) ? ScriptElementKind.memberVariableElement : ScriptElementKind.parameterElement;
+            case 229 /* ImportEqualsDeclaration */:
+            case 234 /* ImportSpecifier */:
+            case 231 /* ImportClause */:
+            case 238 /* ExportSpecifier */:
+            case 232 /* NamespaceImport */:
+                return ScriptElementKind.alias;
+        }
+        return ScriptElementKind.unknown;
+    }
+    ts.getNodeKind = getNodeKind;
+    var CancellationTokenObject = (function () {
+        function CancellationTokenObject(cancellationToken) {
+            this.cancellationToken = cancellationToken;
+        }
+        CancellationTokenObject.prototype.isCancellationRequested = function () {
+            return this.cancellationToken && this.cancellationToken.isCancellationRequested();
+        };
+        CancellationTokenObject.prototype.throwIfCancellationRequested = function () {
+            if (this.isCancellationRequested()) {
+                throw new ts.OperationCanceledException();
+            }
+        };
+        return CancellationTokenObject;
+    }());
+    function createLanguageService(host, documentRegistry) {
+        if (documentRegistry === void 0) { documentRegistry = createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory()); }
+        var syntaxTreeCache = new SyntaxTreeCache(host);
+        var ruleProvider;
+        var program;
+        var lastProjectVersion;
+        var useCaseSensitivefileNames = false;
+        var cancellationToken = new CancellationTokenObject(host.getCancellationToken && host.getCancellationToken());
+        var currentDirectory = host.getCurrentDirectory();
+        // Check if the localized messages json is set, otherwise query the host for it
+        if (!ts.localizedDiagnosticMessages && host.getLocalizedDiagnosticMessages) {
+            ts.localizedDiagnosticMessages = host.getLocalizedDiagnosticMessages();
+        }
+        function log(message) {
+            if (host.log) {
+                host.log(message);
+            }
+        }
+        var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitivefileNames);
+        function getValidSourceFile(fileName) {
+            var sourceFile = program.getSourceFile(fileName);
+            if (!sourceFile) {
+                throw new Error("Could not find file: '" + fileName + "'.");
+            }
+            return sourceFile;
+        }
+        function getRuleProvider(options) {
+            // Ensure rules are initialized and up to date wrt to formatting options
+            if (!ruleProvider) {
+                ruleProvider = new ts.formatting.RulesProvider();
+            }
+            ruleProvider.ensureUpToDate(options);
+            return ruleProvider;
+        }
+        function synchronizeHostData() {
+            // perform fast check if host supports it
+            if (host.getProjectVersion) {
+                var hostProjectVersion = host.getProjectVersion();
+                if (hostProjectVersion) {
+                    if (lastProjectVersion === hostProjectVersion) {
+                        return;
+                    }
+                    lastProjectVersion = hostProjectVersion;
+                }
+            }
+            // Get a fresh cache of the host information
+            var hostCache = new HostCache(host, getCanonicalFileName);
+            // If the program is already up-to-date, we can reuse it
+            if (programUpToDate()) {
+                return;
+            }
+            // IMPORTANT - It is critical from this moment onward that we do not check
+            // cancellation tokens.  We are about to mutate source files from a previous program
+            // instance.  If we cancel midway through, we may end up in an inconsistent state where
+            // the program points to old source files that have been invalidated because of
+            // incremental parsing.
+            var oldSettings = program && program.getCompilerOptions();
+            var newSettings = hostCache.compilationSettings();
+            var changesInCompilationSettingsAffectSyntax = oldSettings &&
+                (oldSettings.target !== newSettings.target ||
+                    oldSettings.module !== newSettings.module ||
+                    oldSettings.moduleResolution !== newSettings.moduleResolution ||
+                    oldSettings.noResolve !== newSettings.noResolve ||
+                    oldSettings.jsx !== newSettings.jsx ||
+                    oldSettings.allowJs !== newSettings.allowJs);
+            // Now create a new compiler
+            var compilerHost = {
+                getSourceFile: getOrCreateSourceFile,
+                getSourceFileByPath: getOrCreateSourceFileByPath,
+                getCancellationToken: function () { return cancellationToken; },
+                getCanonicalFileName: getCanonicalFileName,
+                useCaseSensitiveFileNames: function () { return useCaseSensitivefileNames; },
+                getNewLine: function () { return ts.getNewLineOrDefaultFromHost(host); },
+                getDefaultLibFileName: function (options) { return host.getDefaultLibFileName(options); },
+                writeFile: function (fileName, data, writeByteOrderMark) { },
+                getCurrentDirectory: function () { return currentDirectory; },
+                fileExists: function (fileName) {
+                    // stub missing host functionality
+                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
+                    return hostCache.getOrCreateEntry(fileName) !== undefined;
+                },
+                readFile: function (fileName) {
+                    // stub missing host functionality
+                    var entry = hostCache.getOrCreateEntry(fileName);
+                    return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
+                },
+                directoryExists: function (directoryName) {
+                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
+                    return ts.directoryProbablyExists(directoryName, host);
+                }
+            };
+            if (host.trace) {
+                compilerHost.trace = function (message) { return host.trace(message); };
+            }
+            if (host.resolveModuleNames) {
+                compilerHost.resolveModuleNames = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
+            }
+            if (host.resolveTypeReferenceDirectives) {
+                compilerHost.resolveTypeReferenceDirectives = function (typeReferenceDirectiveNames, containingFile) {
+                    return host.resolveTypeReferenceDirectives(typeReferenceDirectiveNames, containingFile);
+                };
+            }
+            var documentRegistryBucketKey = documentRegistry.getKeyForCompilationSettings(newSettings);
+            var newProgram = ts.createProgram(hostCache.getRootFileNames(), newSettings, compilerHost, program);
+            // Release any files we have acquired in the old program but are
+            // not part of the new program.
+            if (program) {
+                var oldSourceFiles = program.getSourceFiles();
+                var oldSettingsKey = documentRegistry.getKeyForCompilationSettings(oldSettings);
+                for (var _i = 0, oldSourceFiles_1 = oldSourceFiles; _i < oldSourceFiles_1.length; _i++) {
+                    var oldSourceFile = oldSourceFiles_1[_i];
+                    if (!newProgram.getSourceFile(oldSourceFile.fileName) || changesInCompilationSettingsAffectSyntax) {
+                        documentRegistry.releaseDocumentWithKey(oldSourceFile.path, oldSettingsKey);
+                    }
+                }
+            }
+            // hostCache is captured in the closure for 'getOrCreateSourceFile' but it should not be used past this point.
+            // It needs to be cleared to allow all collected snapshots to be released
+            hostCache = undefined;
+            program = newProgram;
+            // Make sure all the nodes in the program are both bound, and have their parent
+            // pointers set property.
+            program.getTypeChecker();
+            return;
+            function getOrCreateSourceFile(fileName) {
+                return getOrCreateSourceFileByPath(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName));
+            }
+            function getOrCreateSourceFileByPath(fileName, path) {
+                ts.Debug.assert(hostCache !== undefined);
+                // The program is asking for this file, check first if the host can locate it.
+                // If the host can not locate the file, then it does not exist. return undefined
+                // to the program to allow reporting of errors for missing files.
+                var hostFileInformation = hostCache.getOrCreateEntryByPath(fileName, path);
+                if (!hostFileInformation) {
+                    return undefined;
+                }
+                // Check if the language version has changed since we last created a program; if they are the same,
+                // it is safe to reuse the sourceFiles; if not, then the shape of the AST can change, and the oldSourceFile
+                // can not be reused. we have to dump all syntax trees and create new ones.
+                if (!changesInCompilationSettingsAffectSyntax) {
+                    // Check if the old program had this file already
+                    var oldSourceFile = program && program.getSourceFileByPath(path);
+                    if (oldSourceFile) {
+                        // We already had a source file for this file name.  Go to the registry to
+                        // ensure that we get the right up to date version of it.  We need this to
+                        // address the following race-condition.  Specifically, say we have the following:
+                        //
+                        //      LS1
+                        //          \
+                        //           DocumentRegistry
+                        //          /
+                        //      LS2
+                        //
+                        // Each LS has a reference to file 'foo.ts' at version 1.  LS2 then updates
+                        // it's version of 'foo.ts' to version 2.  This will cause LS2 and the
+                        // DocumentRegistry to have version 2 of the document.  HOwever, LS1 will
+                        // have version 1.  And *importantly* this source file will be *corrupt*.
+                        // The act of creating version 2 of the file irrevocably damages the version
+                        // 1 file.
+                        //
+                        // So, later when we call into LS1, we need to make sure that it doesn't use
+                        // it's source file any more, and instead defers to DocumentRegistry to get
+                        // either version 1, version 2 (or some other version) depending on what the
+                        // host says should be used.
+                        // We do not support the scenario where a host can modify a registered
+                        // file's script kind, i.e. in one project some file is treated as ".ts"
+                        // and in another as ".js"
+                        ts.Debug.assert(hostFileInformation.scriptKind === oldSourceFile.scriptKind, "Registered script kind (" + oldSourceFile.scriptKind + ") should match new script kind (" + hostFileInformation.scriptKind + ") for file: " + path);
+                        return documentRegistry.updateDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
+                    }
+                }
+                // Could not find this file in the old program, create a new SourceFile for it.
+                return documentRegistry.acquireDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
+            }
+            function sourceFileUpToDate(sourceFile) {
+                if (!sourceFile) {
+                    return false;
+                }
+                var path = sourceFile.path || ts.toPath(sourceFile.fileName, currentDirectory, getCanonicalFileName);
+                return sourceFile.version === hostCache.getVersion(path);
+            }
+            function programUpToDate() {
+                // If we haven't create a program yet, then it is not up-to-date
+                if (!program) {
+                    return false;
+                }
+                // If number of files in the program do not match, it is not up-to-date
+                var rootFileNames = hostCache.getRootFileNames();
+                if (program.getSourceFiles().length !== rootFileNames.length) {
+                    return false;
+                }
+                // If any file is not up-to-date, then the whole program is not up-to-date
+                for (var _i = 0, rootFileNames_2 = rootFileNames; _i < rootFileNames_2.length; _i++) {
+                    var fileName = rootFileNames_2[_i];
+                    if (!sourceFileUpToDate(program.getSourceFile(fileName))) {
+                        return false;
+                    }
+                }
+                // If the compilation settings do no match, then the program is not up-to-date
+                return ts.compareDataObjects(program.getCompilerOptions(), hostCache.compilationSettings());
+            }
+        }
+        function getProgram() {
+            synchronizeHostData();
+            return program;
+        }
+        function cleanupSemanticCache() {
+            // TODO: Should we jettison the program (or it's type checker) here?
+        }
+        function dispose() {
+            if (program) {
+                ts.forEach(program.getSourceFiles(), function (f) {
+                    return documentRegistry.releaseDocument(f.fileName, program.getCompilerOptions());
+                });
+            }
+        }
+        /// Diagnostics
+        function getSyntacticDiagnostics(fileName) {
+            synchronizeHostData();
+            return program.getSyntacticDiagnostics(getValidSourceFile(fileName), cancellationToken);
+        }
+        /**
+         * getSemanticDiagnostics return array of Diagnostics. If '-d' is not enabled, only report semantic errors
+         * If '-d' enabled, report both semantic and emitter errors
+         */
+        function getSemanticDiagnostics(fileName) {
+            synchronizeHostData();
+            var targetSourceFile = getValidSourceFile(fileName);
+            // Only perform the action per file regardless of '-out' flag as LanguageServiceHost is expected to call this function per file.
+            // Therefore only get diagnostics for given file.
+            var semanticDiagnostics = program.getSemanticDiagnostics(targetSourceFile, cancellationToken);
+            if (!program.getCompilerOptions().declaration) {
+                return semanticDiagnostics;
+            }
+            // If '-d' is enabled, check for emitter error. One example of emitter error is export class implements non-export interface
+            var declarationDiagnostics = program.getDeclarationDiagnostics(targetSourceFile, cancellationToken);
+            return ts.concatenate(semanticDiagnostics, declarationDiagnostics);
+        }
+        function getCompilerOptionsDiagnostics() {
+            synchronizeHostData();
+            return program.getOptionsDiagnostics(cancellationToken).concat(program.getGlobalDiagnostics(cancellationToken));
+        }
+        /**
+         * Get the name to be display in completion from a given symbol.
+         *
+         * @return undefined if the name is of external module otherwise a name with striped of any quote
+         */
+        function getCompletionEntryDisplayNameForSymbol(symbol, target, performCharacterChecks, location) {
+            var displayName = ts.getDeclaredName(program.getTypeChecker(), symbol, location);
+            if (displayName) {
+                var firstCharCode = displayName.charCodeAt(0);
+                // First check of the displayName is not external module; if it is an external module, it is not valid entry
+                if ((symbol.flags & 1536 /* Namespace */) && (firstCharCode === 39 /* singleQuote */ || firstCharCode === 34 /* doubleQuote */)) {
+                    // If the symbol is external module, don't show it in the completion list
+                    // (i.e declare module "http" { const x; } | // <= request completion here, "http" should not be there)
+                    return undefined;
+                }
+            }
+            return getCompletionEntryDisplayName(displayName, target, performCharacterChecks);
+        }
+        /**
+         * Get a displayName from a given for completion list, performing any necessary quotes stripping
+         * and checking whether the name is valid identifier name.
+         */
+        function getCompletionEntryDisplayName(name, target, performCharacterChecks) {
+            if (!name) {
+                return undefined;
+            }
+            name = ts.stripQuotes(name);
+            if (!name) {
+                return undefined;
+            }
+            // If the user entered name for the symbol was quoted, removing the quotes is not enough, as the name could be an
+            // invalid identifier name. We need to check if whatever was inside the quotes is actually a valid identifier name.
+            // e.g "b a" is valid quoted name but when we strip off the quotes, it is invalid.
+            // We, thus, need to check if whatever was inside the quotes is actually a valid identifier name.
+            if (performCharacterChecks) {
+                if (!ts.isIdentifier(name, target)) {
+                    return undefined;
+                }
+            }
+            return name;
+        }
+        function getCompletionData(fileName, position) {
+            var typeChecker = program.getTypeChecker();
+            var sourceFile = getValidSourceFile(fileName);
+            var isJavaScriptFile = ts.isSourceFileJavaScript(sourceFile);
+            var isJsDocTagName = false;
+            var start = new Date().getTime();
+            var currentToken = ts.getTokenAtPosition(sourceFile, position);
+            log("getCompletionData: Get current token: " + (new Date().getTime() - start));
+            start = new Date().getTime();
+            // Completion not allowed inside comments, bail out if this is the case
+            var insideComment = isInsideComment(sourceFile, currentToken, position);
+            log("getCompletionData: Is inside comment: " + (new Date().getTime() - start));
+            if (insideComment) {
+                // The current position is next to the '@' sign, when no tag name being provided yet.
+                // Provide a full list of tag names
+                if (ts.hasDocComment(sourceFile, position) && sourceFile.text.charCodeAt(position - 1) === 64 /* at */) {
+                    isJsDocTagName = true;
+                }
+                // Completion should work inside certain JsDoc tags. For example:
+                //     /** @type {number | string} */
+                // Completion should work in the brackets
+                var insideJsDocTagExpression = false;
+                var tag = ts.getJsDocTagAtPosition(sourceFile, position);
+                if (tag) {
+                    if (tag.tagName.pos <= position && position <= tag.tagName.end) {
+                        isJsDocTagName = true;
+                    }
+                    switch (tag.kind) {
+                        case 277 /* JSDocTypeTag */:
+                        case 275 /* JSDocParameterTag */:
+                        case 276 /* JSDocReturnTag */:
+                            var tagWithExpression = tag;
+                            if (tagWithExpression.typeExpression) {
+                                insideJsDocTagExpression = tagWithExpression.typeExpression.pos < position && position < tagWithExpression.typeExpression.end;
+                            }
+                            break;
+                    }
+                }
+                if (isJsDocTagName) {
+                    return { symbols: undefined, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, isJsDocTagName: isJsDocTagName };
+                }
+                if (!insideJsDocTagExpression) {
+                    // Proceed if the current position is in jsDoc tag expression; otherwise it is a normal
+                    // comment or the plain text part of a jsDoc comment, so no completion should be available
+                    log("Returning an empty list because completion was inside a regular comment or plain text part of a JsDoc comment.");
+                    return undefined;
+                }
+            }
+            start = new Date().getTime();
+            var previousToken = ts.findPrecedingToken(position, sourceFile);
+            log("getCompletionData: Get previous token 1: " + (new Date().getTime() - start));
+            // The decision to provide completion depends on the contextToken, which is determined through the previousToken.
+            // Note: 'previousToken' (and thus 'contextToken') can be undefined if we are the beginning of the file
+            var contextToken = previousToken;
+            // Check if the caret is at the end of an identifier; this is a partial identifier that we want to complete: e.g. a.toS|
+            // Skip this partial identifier and adjust the contextToken to the token that precedes it.
+            if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
+                var start_5 = new Date().getTime();
+                contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
+                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_5));
+            }
+            // Find the node where completion is requested on.
+            // Also determine whether we are trying to complete with members of that node
+            // or attributes of a JSX tag.
+            var node = currentToken;
+            var isRightOfDot = false;
+            var isRightOfOpenTag = false;
+            var isStartingCloseTag = false;
+            var location = ts.getTouchingPropertyName(sourceFile, position);
+            if (contextToken) {
+                // Bail out if this is a known invalid completion location
+                if (isCompletionListBlocker(contextToken)) {
+                    log("Returning an empty list because completion was requested in an invalid position.");
+                    return undefined;
+                }
+                var parent_16 = contextToken.parent, kind = contextToken.kind;
+                if (kind === 21 /* DotToken */) {
+                    if (parent_16.kind === 172 /* PropertyAccessExpression */) {
+                        node = contextToken.parent.expression;
+                        isRightOfDot = true;
+                    }
+                    else if (parent_16.kind === 139 /* QualifiedName */) {
+                        node = contextToken.parent.left;
+                        isRightOfDot = true;
+                    }
+                    else {
+                        // There is nothing that precedes the dot, so this likely just a stray character
+                        // or leading into a '...' token. Just bail out instead.
+                        return undefined;
+                    }
+                }
+                else if (sourceFile.languageVariant === 1 /* JSX */) {
+                    if (kind === 25 /* LessThanToken */) {
+                        isRightOfOpenTag = true;
+                        location = contextToken;
+                    }
+                    else if (kind === 39 /* SlashToken */ && contextToken.parent.kind === 245 /* JsxClosingElement */) {
+                        isStartingCloseTag = true;
+                        location = contextToken;
+                    }
+                }
+            }
+            var semanticStart = new Date().getTime();
+            var isMemberCompletion;
+            var isNewIdentifierLocation;
+            var symbols = [];
+            if (isRightOfDot) {
+                getTypeScriptMemberSymbols();
+            }
+            else if (isRightOfOpenTag) {
+                var tagSymbols = typeChecker.getJsxIntrinsicTagNames();
+                if (tryGetGlobalSymbols()) {
+                    symbols = tagSymbols.concat(symbols.filter(function (s) { return !!(s.flags & (107455 /* Value */ | 8388608 /* Alias */)); }));
+                }
+                else {
+                    symbols = tagSymbols;
+                }
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+            }
+            else if (isStartingCloseTag) {
+                var tagName = contextToken.parent.parent.openingElement.tagName;
+                var tagSymbol = typeChecker.getSymbolAtLocation(tagName);
+                if (!typeChecker.isUnknownSymbol(tagSymbol)) {
+                    symbols = [tagSymbol];
+                }
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+            }
+            else {
+                // For JavaScript or TypeScript, if we're not after a dot, then just try to get the
+                // global symbols in scope.  These results should be valid for either language as
+                // the set of symbols that can be referenced from this location.
+                if (!tryGetGlobalSymbols()) {
+                    return undefined;
+                }
+            }
+            log("getCompletionData: Semantic work: " + (new Date().getTime() - semanticStart));
+            return { symbols: symbols, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, location: location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), isJsDocTagName: isJsDocTagName };
+            function getTypeScriptMemberSymbols() {
+                // Right of dot member completion list
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+                if (node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */ || node.kind === 172 /* PropertyAccessExpression */) {
+                    var symbol = typeChecker.getSymbolAtLocation(node);
+                    // This is an alias, follow what it aliases
+                    if (symbol && symbol.flags & 8388608 /* Alias */) {
+                        symbol = typeChecker.getAliasedSymbol(symbol);
+                    }
+                    if (symbol && symbol.flags & 1952 /* HasExports */) {
+                        // Extract module or enum members
+                        var exportedSymbols = typeChecker.getExportsOfModule(symbol);
+                        ts.forEach(exportedSymbols, function (symbol) {
+                            if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
+                                symbols.push(symbol);
+                            }
+                        });
+                    }
+                }
+                var type = typeChecker.getTypeAtLocation(node);
+                addTypeProperties(type);
+            }
+            function addTypeProperties(type) {
+                if (type) {
+                    // Filter private properties
+                    for (var _i = 0, _a = type.getApparentProperties(); _i < _a.length; _i++) {
+                        var symbol = _a[_i];
+                        if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
+                            symbols.push(symbol);
+                        }
+                    }
+                    if (isJavaScriptFile && type.flags & 16384 /* Union */) {
+                        // In javascript files, for union types, we don't just get the members that
+                        // the individual types have in common, we also include all the members that
+                        // each individual type has.  This is because we're going to add all identifiers
+                        // anyways.  So we might as well elevate the members that were at least part
+                        // of the individual types to a higher status since we know what they are.
+                        var unionType = type;
+                        for (var _b = 0, _c = unionType.types; _b < _c.length; _b++) {
+                            var elementType = _c[_b];
+                            addTypeProperties(elementType);
+                        }
+                    }
+                }
+            }
+            function tryGetGlobalSymbols() {
+                var objectLikeContainer;
+                var namedImportsOrExports;
+                var jsxContainer;
+                if (objectLikeContainer = tryGetObjectLikeCompletionContainer(contextToken)) {
+                    return tryGetObjectLikeCompletionSymbols(objectLikeContainer);
+                }
+                if (namedImportsOrExports = tryGetNamedImportsOrExportsForCompletion(contextToken)) {
+                    // cursor is in an import clause
+                    // try to show exported member for imported module
+                    return tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports);
+                }
+                if (jsxContainer = tryGetContainingJsxElement(contextToken)) {
+                    var attrsType = void 0;
+                    if ((jsxContainer.kind === 242 /* JsxSelfClosingElement */) || (jsxContainer.kind === 243 /* JsxOpeningElement */)) {
+                        // Cursor is inside a JSX self-closing element or opening element
+                        attrsType = typeChecker.getJsxElementAttributesType(jsxContainer);
+                        if (attrsType) {
+                            symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), jsxContainer.attributes);
+                            isMemberCompletion = true;
+                            isNewIdentifierLocation = false;
+                            return true;
+                        }
+                    }
+                }
+                // Get all entities in the current scope.
+                isMemberCompletion = false;
+                isNewIdentifierLocation = isNewIdentifierDefinitionLocation(contextToken);
+                if (previousToken !== contextToken) {
+                    ts.Debug.assert(!!previousToken, "Expected 'contextToken' to be defined when different from 'previousToken'.");
+                }
+                // We need to find the node that will give us an appropriate scope to begin
+                // aggregating completion candidates. This is achieved in 'getScopeNode'
+                // by finding the first node that encompasses a position, accounting for whether a node
+                // is "complete" to decide whether a position belongs to the node.
+                //
+                // However, at the end of an identifier, we are interested in the scope of the identifier
+                // itself, but fall outside of the identifier. For instance:
+                //
+                //      xyz => x$
+                //
+                // the cursor is outside of both the 'x' and the arrow function 'xyz => x',
+                // so 'xyz' is not returned in our results.
+                //
+                // We define 'adjustedPosition' so that we may appropriately account for
+                // being at the end of an identifier. The intention is that if requesting completion
+                // at the end of an identifier, it should be effectively equivalent to requesting completion
+                // anywhere inside/at the beginning of the identifier. So in the previous case, the
+                // 'adjustedPosition' will work as if requesting completion in the following:
+                //
+                //      xyz => $x
+                //
+                // If previousToken !== contextToken, then
+                //   - 'contextToken' was adjusted to the token prior to 'previousToken'
+                //      because we were at the end of an identifier.
+                //   - 'previousToken' is defined.
+                var adjustedPosition = previousToken !== contextToken ?
+                    previousToken.getStart() :
+                    position;
+                var scopeNode = getScopeNode(contextToken, adjustedPosition, sourceFile) || sourceFile;
+                /// TODO filter meaning based on the current context
+                var symbolMeanings = 793056 /* Type */ | 107455 /* Value */ | 1536 /* Namespace */ | 8388608 /* Alias */;
+                symbols = typeChecker.getSymbolsInScope(scopeNode, symbolMeanings);
+                return true;
+            }
+            /**
+             * Finds the first node that "embraces" the position, so that one may
+             * accurately aggregate locals from the closest containing scope.
+             */
+            function getScopeNode(initialToken, position, sourceFile) {
+                var scope = initialToken;
+                while (scope && !ts.positionBelongsToNode(scope, position, sourceFile)) {
+                    scope = scope.parent;
+                }
+                return scope;
+            }
+            function isCompletionListBlocker(contextToken) {
+                var start = new Date().getTime();
+                var result = isInStringOrRegularExpressionOrTemplateLiteral(contextToken) ||
+                    isSolelyIdentifierDefinitionLocation(contextToken) ||
+                    isDotOfNumericLiteral(contextToken) ||
+                    isInJsxText(contextToken);
+                log("getCompletionsAtPosition: isCompletionListBlocker: " + (new Date().getTime() - start));
+                return result;
+            }
+            function isInJsxText(contextToken) {
+                if (contextToken.kind === 244 /* JsxText */) {
+                    return true;
+                }
+                if (contextToken.kind === 27 /* GreaterThanToken */ && contextToken.parent) {
+                    if (contextToken.parent.kind === 243 /* JsxOpeningElement */) {
+                        return true;
+                    }
+                    if (contextToken.parent.kind === 245 /* JsxClosingElement */ || contextToken.parent.kind === 242 /* JsxSelfClosingElement */) {
+                        return contextToken.parent.parent && contextToken.parent.parent.kind === 241 /* JsxElement */;
+                    }
+                }
+                return false;
+            }
+            function isNewIdentifierDefinitionLocation(previousToken) {
+                if (previousToken) {
+                    var containingNodeKind = previousToken.parent.kind;
+                    switch (previousToken.kind) {
+                        case 24 /* CommaToken */:
+                            return containingNodeKind === 174 /* CallExpression */ // func( a, |
+                                || containingNodeKind === 148 /* Constructor */ // constructor( a, |   /* public, protected, private keywords are allowed here, so show completion */
+                                || containingNodeKind === 175 /* NewExpression */ // new C(a, |
+                                || containingNodeKind === 170 /* ArrayLiteralExpression */ // [a, |
+                                || containingNodeKind === 187 /* BinaryExpression */ // const x = (a, |
+                                || containingNodeKind === 156 /* FunctionType */; // var x: (s: string, list|
+                        case 17 /* OpenParenToken */:
+                            return containingNodeKind === 174 /* CallExpression */ // func( |
+                                || containingNodeKind === 148 /* Constructor */ // constructor( |
+                                || containingNodeKind === 175 /* NewExpression */ // new C(a|
+                                || containingNodeKind === 178 /* ParenthesizedExpression */ // const x = (a|
+                                || containingNodeKind === 164 /* ParenthesizedType */; // function F(pred: (a| /* this can become an arrow function, where 'a' is the argument */
+                        case 19 /* OpenBracketToken */:
+                            return containingNodeKind === 170 /* ArrayLiteralExpression */ // [ |
+                                || containingNodeKind === 153 /* IndexSignature */ // [ | : string ]
+                                || containingNodeKind === 140 /* ComputedPropertyName */; // [ |    /* this can become an index signature */
+                        case 125 /* ModuleKeyword */: // module |
+                        case 126 /* NamespaceKeyword */:
+                            return true;
+                        case 21 /* DotToken */:
+                            return containingNodeKind === 225 /* ModuleDeclaration */; // module A.|
+                        case 15 /* OpenBraceToken */:
+                            return containingNodeKind === 221 /* ClassDeclaration */; // class A{ |
+                        case 56 /* EqualsToken */:
+                            return containingNodeKind === 218 /* VariableDeclaration */ // const x = a|
+                                || containingNodeKind === 187 /* BinaryExpression */; // x = a|
+                        case 12 /* TemplateHead */:
+                            return containingNodeKind === 189 /* TemplateExpression */; // `aa ${|
+                        case 13 /* TemplateMiddle */:
+                            return containingNodeKind === 197 /* TemplateSpan */; // `aa ${10} dd ${|
+                        case 112 /* PublicKeyword */:
+                        case 110 /* PrivateKeyword */:
+                        case 111 /* ProtectedKeyword */:
+                            return containingNodeKind === 145 /* PropertyDeclaration */; // class A{ public |
+                    }
+                    // Previous token may have been a keyword that was converted to an identifier.
+                    switch (previousToken.getText()) {
+                        case "public":
+                        case "protected":
+                        case "private":
+                            return true;
+                    }
+                }
+                return false;
+            }
+            function isInStringOrRegularExpressionOrTemplateLiteral(contextToken) {
+                if (contextToken.kind === 9 /* StringLiteral */
+                    || contextToken.kind === 166 /* StringLiteralType */
+                    || contextToken.kind === 10 /* RegularExpressionLiteral */
+                    || ts.isTemplateLiteralKind(contextToken.kind)) {
+                    var start_6 = contextToken.getStart();
+                    var end = contextToken.getEnd();
+                    // To be "in" one of these literals, the position has to be:
+                    //   1. entirely within the token text.
+                    //   2. at the end position of an unterminated token.
+                    //   3. at the end of a regular expression (due to trailing flags like '/foo/g').
+                    if (start_6 < position && position < end) {
+                        return true;
+                    }
+                    if (position === end) {
+                        return !!contextToken.isUnterminated
+                            || contextToken.kind === 10 /* RegularExpressionLiteral */;
+                    }
+                }
+                return false;
+            }
+            /**
+             * Aggregates relevant symbols for completion in object literals and object binding patterns.
+             * Relevant symbols are stored in the captured 'symbols' variable.
+             *
+             * @returns true if 'symbols' was successfully populated; false otherwise.
+             */
+            function tryGetObjectLikeCompletionSymbols(objectLikeContainer) {
+                // We're looking up possible property names from contextual/inferred/declared type.
+                isMemberCompletion = true;
+                var typeForObject;
+                var existingMembers;
+                if (objectLikeContainer.kind === 171 /* ObjectLiteralExpression */) {
+                    // We are completing on contextual types, but may also include properties
+                    // other than those within the declared type.
+                    isNewIdentifierLocation = true;
+                    typeForObject = typeChecker.getContextualType(objectLikeContainer);
+                    existingMembers = objectLikeContainer.properties;
+                }
+                else if (objectLikeContainer.kind === 167 /* ObjectBindingPattern */) {
+                    // We are *only* completing on properties from the type being destructured.
+                    isNewIdentifierLocation = false;
+                    var rootDeclaration = ts.getRootDeclaration(objectLikeContainer.parent);
+                    if (ts.isVariableLike(rootDeclaration)) {
+                        // We don't want to complete using the type acquired by the shape
+                        // of the binding pattern; we are only interested in types acquired
+                        // through type declaration or inference.
+                        // Also proceed if rootDeclaration is parameter and if its containing function expression\arrow function is contextually typed -
+                        // type of parameter will flow in from the contextual type of the function
+                        var canGetType = !!(rootDeclaration.initializer || rootDeclaration.type);
+                        if (!canGetType && rootDeclaration.kind === 142 /* Parameter */) {
+                            if (ts.isExpression(rootDeclaration.parent)) {
+                                canGetType = !!typeChecker.getContextualType(rootDeclaration.parent);
+                            }
+                            else if (rootDeclaration.parent.kind === 147 /* MethodDeclaration */ || rootDeclaration.parent.kind === 150 /* SetAccessor */) {
+                                canGetType = ts.isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(rootDeclaration.parent.parent);
+                            }
+                        }
+                        if (canGetType) {
+                            typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
+                            existingMembers = objectLikeContainer.elements;
+                        }
+                    }
+                    else {
+                        ts.Debug.fail("Root declaration is not variable-like.");
+                    }
+                }
+                else {
+                    ts.Debug.fail("Expected object literal or binding pattern, got " + objectLikeContainer.kind);
+                }
+                if (!typeForObject) {
+                    return false;
+                }
+                var typeMembers = typeChecker.getPropertiesOfType(typeForObject);
+                if (typeMembers && typeMembers.length > 0) {
+                    // Add filtered items to the completion list
+                    symbols = filterObjectMembersList(typeMembers, existingMembers);
+                }
+                return true;
+            }
+            /**
+             * Aggregates relevant symbols for completion in import clauses and export clauses
+             * whose declarations have a module specifier; for instance, symbols will be aggregated for
+             *
+             *      import { | } from "moduleName";
+             *      export { a as foo, | } from "moduleName";
+             *
+             * but not for
+             *
+             *      export { | };
+             *
+             * Relevant symbols are stored in the captured 'symbols' variable.
+             *
+             * @returns true if 'symbols' was successfully populated; false otherwise.
+             */
+            function tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports) {
+                var declarationKind = namedImportsOrExports.kind === 233 /* NamedImports */ ?
+                    230 /* ImportDeclaration */ :
+                    236 /* ExportDeclaration */;
+                var importOrExportDeclaration = ts.getAncestor(namedImportsOrExports, declarationKind);
+                var moduleSpecifier = importOrExportDeclaration.moduleSpecifier;
+                if (!moduleSpecifier) {
+                    return false;
+                }
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+                var exports;
+                var moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(importOrExportDeclaration.moduleSpecifier);
+                if (moduleSpecifierSymbol) {
+                    exports = typeChecker.getExportsOfModule(moduleSpecifierSymbol);
+                }
+                symbols = exports ? filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements) : emptyArray;
+                return true;
+            }
+            /**
+             * Returns the immediate owning object literal or binding pattern of a context token,
+             * on the condition that one exists and that the context implies completion should be given.
+             */
+            function tryGetObjectLikeCompletionContainer(contextToken) {
+                if (contextToken) {
+                    switch (contextToken.kind) {
+                        case 15 /* OpenBraceToken */: // const x = { |
+                        case 24 /* CommaToken */:
+                            var parent_17 = contextToken.parent;
+                            if (parent_17 && (parent_17.kind === 171 /* ObjectLiteralExpression */ || parent_17.kind === 167 /* ObjectBindingPattern */)) {
+                                return parent_17;
+                            }
+                            break;
+                    }
+                }
+                return undefined;
+            }
+            /**
+             * Returns the containing list of named imports or exports of a context token,
+             * on the condition that one exists and that the context implies completion should be given.
+             */
+            function tryGetNamedImportsOrExportsForCompletion(contextToken) {
+                if (contextToken) {
+                    switch (contextToken.kind) {
+                        case 15 /* OpenBraceToken */: // import { |
+                        case 24 /* CommaToken */:
+                            switch (contextToken.parent.kind) {
+                                case 233 /* NamedImports */:
+                                case 237 /* NamedExports */:
+                                    return contextToken.parent;
+                            }
+                    }
+                }
+                return undefined;
+            }
+            function tryGetContainingJsxElement(contextToken) {
+                if (contextToken) {
+                    var parent_18 = contextToken.parent;
+                    switch (contextToken.kind) {
+                        case 26 /* LessThanSlashToken */:
+                        case 39 /* SlashToken */:
+                        case 69 /* Identifier */:
+                        case 246 /* JsxAttribute */:
+                        case 247 /* JsxSpreadAttribute */:
+                            if (parent_18 && (parent_18.kind === 242 /* JsxSelfClosingElement */ || parent_18.kind === 243 /* JsxOpeningElement */)) {
+                                return parent_18;
+                            }
+                            else if (parent_18.kind === 246 /* JsxAttribute */) {
+                                return parent_18.parent;
+                            }
+                            break;
+                        // The context token is the closing } or " of an attribute, which means
+                        // its parent is a JsxExpression, whose parent is a JsxAttribute,
+                        // whose parent is a JsxOpeningLikeElement
+                        case 9 /* StringLiteral */:
+                            if (parent_18 && ((parent_18.kind === 246 /* JsxAttribute */) || (parent_18.kind === 247 /* JsxSpreadAttribute */))) {
+                                return parent_18.parent;
+                            }
+                            break;
+                        case 16 /* CloseBraceToken */:
+                            if (parent_18 &&
+                                parent_18.kind === 248 /* JsxExpression */ &&
+                                parent_18.parent &&
+                                (parent_18.parent.kind === 246 /* JsxAttribute */)) {
+                                return parent_18.parent.parent;
+                            }
+                            if (parent_18 && parent_18.kind === 247 /* JsxSpreadAttribute */) {
+                                return parent_18.parent;
+                            }
+                            break;
+                    }
+                }
+                return undefined;
+            }
+            function isFunction(kind) {
+                switch (kind) {
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 220 /* FunctionDeclaration */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 151 /* CallSignature */:
+                    case 152 /* ConstructSignature */:
+                    case 153 /* IndexSignature */:
+                        return true;
+                }
+                return false;
+            }
+            /**
+             * @returns true if we are certain that the currently edited location must define a new location; false otherwise.
+             */
+            function isSolelyIdentifierDefinitionLocation(contextToken) {
+                var containingNodeKind = contextToken.parent.kind;
+                switch (contextToken.kind) {
+                    case 24 /* CommaToken */:
+                        return containingNodeKind === 218 /* VariableDeclaration */ ||
+                            containingNodeKind === 219 /* VariableDeclarationList */ ||
+                            containingNodeKind === 200 /* VariableStatement */ ||
+                            containingNodeKind === 224 /* EnumDeclaration */ ||
+                            isFunction(containingNodeKind) ||
+                            containingNodeKind === 221 /* ClassDeclaration */ ||
+                            containingNodeKind === 192 /* ClassExpression */ ||
+                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
+                            containingNodeKind === 168 /* ArrayBindingPattern */ ||
+                            containingNodeKind === 223 /* TypeAliasDeclaration */; // type Map, K, |
+                    case 21 /* DotToken */:
+                        return containingNodeKind === 168 /* ArrayBindingPattern */; // var [.|
+                    case 54 /* ColonToken */:
+                        return containingNodeKind === 169 /* BindingElement */; // var {x :html|
+                    case 19 /* OpenBracketToken */:
+                        return containingNodeKind === 168 /* ArrayBindingPattern */; // var [x|
+                    case 17 /* OpenParenToken */:
+                        return containingNodeKind === 252 /* CatchClause */ ||
+                            isFunction(containingNodeKind);
+                    case 15 /* OpenBraceToken */:
+                        return containingNodeKind === 224 /* EnumDeclaration */ ||
+                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
+                            containingNodeKind === 159 /* TypeLiteral */; // const x : { |
+                    case 23 /* SemicolonToken */:
+                        return containingNodeKind === 144 /* PropertySignature */ &&
+                            contextToken.parent && contextToken.parent.parent &&
+                            (contextToken.parent.parent.kind === 222 /* InterfaceDeclaration */ ||
+                                contextToken.parent.parent.kind === 159 /* TypeLiteral */); // const x : { a; |
+                    case 25 /* LessThanToken */:
+                        return containingNodeKind === 221 /* ClassDeclaration */ ||
+                            containingNodeKind === 192 /* ClassExpression */ ||
+                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
+                            containingNodeKind === 223 /* TypeAliasDeclaration */ ||
+                            isFunction(containingNodeKind);
+                    case 113 /* StaticKeyword */:
+                        return containingNodeKind === 145 /* PropertyDeclaration */;
+                    case 22 /* DotDotDotToken */:
+                        return containingNodeKind === 142 /* Parameter */ ||
+                            (contextToken.parent && contextToken.parent.parent &&
+                                contextToken.parent.parent.kind === 168 /* ArrayBindingPattern */); // var [...z|
+                    case 112 /* PublicKeyword */:
+                    case 110 /* PrivateKeyword */:
+                    case 111 /* ProtectedKeyword */:
+                        return containingNodeKind === 142 /* Parameter */;
+                    case 116 /* AsKeyword */:
+                        return containingNodeKind === 234 /* ImportSpecifier */ ||
+                            containingNodeKind === 238 /* ExportSpecifier */ ||
+                            containingNodeKind === 232 /* NamespaceImport */;
+                    case 73 /* ClassKeyword */:
+                    case 81 /* EnumKeyword */:
+                    case 107 /* InterfaceKeyword */:
+                    case 87 /* FunctionKeyword */:
+                    case 102 /* VarKeyword */:
+                    case 123 /* GetKeyword */:
+                    case 131 /* SetKeyword */:
+                    case 89 /* ImportKeyword */:
+                    case 108 /* LetKeyword */:
+                    case 74 /* ConstKeyword */:
+                    case 114 /* YieldKeyword */:
+                    case 134 /* TypeKeyword */:
+                        return true;
+                }
+                // Previous token may have been a keyword that was converted to an identifier.
+                switch (contextToken.getText()) {
+                    case "abstract":
+                    case "async":
+                    case "class":
+                    case "const":
+                    case "declare":
+                    case "enum":
+                    case "function":
+                    case "interface":
+                    case "let":
+                    case "private":
+                    case "protected":
+                    case "public":
+                    case "static":
+                    case "var":
+                    case "yield":
+                        return true;
+                }
+                return false;
+            }
+            function isDotOfNumericLiteral(contextToken) {
+                if (contextToken.kind === 8 /* NumericLiteral */) {
+                    var text = contextToken.getFullText();
+                    return text.charAt(text.length - 1) === ".";
+                }
+                return false;
+            }
+            /**
+             * Filters out completion suggestions for named imports or exports.
+             *
+             * @param exportsOfModule          The list of symbols which a module exposes.
+             * @param namedImportsOrExports    The list of existing import/export specifiers in the import/export clause.
+             *
+             * @returns Symbols to be suggested at an import/export clause, barring those whose named imports/exports
+             *          do not occur at the current position and have not otherwise been typed.
+             */
+            function filterNamedImportOrExportCompletionItems(exportsOfModule, namedImportsOrExports) {
+                var existingImportsOrExports = {};
+                for (var _i = 0, namedImportsOrExports_1 = namedImportsOrExports; _i < namedImportsOrExports_1.length; _i++) {
+                    var element = namedImportsOrExports_1[_i];
+                    // If this is the current item we are editing right now, do not filter it out
+                    if (element.getStart() <= position && position <= element.getEnd()) {
+                        continue;
+                    }
+                    var name_40 = element.propertyName || element.name;
+                    existingImportsOrExports[name_40.text] = true;
+                }
+                if (ts.isEmpty(existingImportsOrExports)) {
+                    return ts.filter(exportsOfModule, function (e) { return e.name !== "default"; });
+                }
+                return ts.filter(exportsOfModule, function (e) { return e.name !== "default" && !ts.lookUp(existingImportsOrExports, e.name); });
+            }
+            /**
+             * Filters out completion suggestions for named imports or exports.
+             *
+             * @returns Symbols to be suggested in an object binding pattern or object literal expression, barring those whose declarations
+             *          do not occur at the current position and have not otherwise been typed.
+             */
+            function filterObjectMembersList(contextualMemberSymbols, existingMembers) {
+                if (!existingMembers || existingMembers.length === 0) {
+                    return contextualMemberSymbols;
+                }
+                var existingMemberNames = {};
+                for (var _i = 0, existingMembers_1 = existingMembers; _i < existingMembers_1.length; _i++) {
+                    var m = existingMembers_1[_i];
+                    // Ignore omitted expressions for missing members
+                    if (m.kind !== 253 /* PropertyAssignment */ &&
+                        m.kind !== 254 /* ShorthandPropertyAssignment */ &&
+                        m.kind !== 169 /* BindingElement */ &&
+                        m.kind !== 147 /* MethodDeclaration */) {
+                        continue;
+                    }
+                    // If this is the current item we are editing right now, do not filter it out
+                    if (m.getStart() <= position && position <= m.getEnd()) {
+                        continue;
+                    }
+                    var existingName = void 0;
+                    if (m.kind === 169 /* BindingElement */ && m.propertyName) {
+                        // include only identifiers in completion list
+                        if (m.propertyName.kind === 69 /* Identifier */) {
+                            existingName = m.propertyName.text;
+                        }
+                    }
+                    else {
+                        // TODO(jfreeman): Account for computed property name
+                        // NOTE: if one only performs this step when m.name is an identifier,
+                        // things like '__proto__' are not filtered out.
+                        existingName = m.name.text;
+                    }
+                    existingMemberNames[existingName] = true;
+                }
+                return ts.filter(contextualMemberSymbols, function (m) { return !ts.lookUp(existingMemberNames, m.name); });
+            }
+            /**
+             * Filters out completion suggestions from 'symbols' according to existing JSX attributes.
+             *
+             * @returns Symbols to be suggested in a JSX element, barring those whose attributes
+             *          do not occur at the current position and have not otherwise been typed.
+             */
+            function filterJsxAttributes(symbols, attributes) {
+                var seenNames = {};
+                for (var _i = 0, attributes_1 = attributes; _i < attributes_1.length; _i++) {
+                    var attr = attributes_1[_i];
+                    // If this is the current item we are editing right now, do not filter it out
+                    if (attr.getStart() <= position && position <= attr.getEnd()) {
+                        continue;
+                    }
+                    if (attr.kind === 246 /* JsxAttribute */) {
+                        seenNames[attr.name.text] = true;
+                    }
+                }
+                return ts.filter(symbols, function (a) { return !ts.lookUp(seenNames, a.name); });
+            }
+        }
+        function getCompletionsAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            if (ts.isInString(sourceFile, position)) {
+                return getStringLiteralCompletionEntries(sourceFile, position);
+            }
+            var completionData = getCompletionData(fileName, position);
+            if (!completionData) {
+                return undefined;
+            }
+            var symbols = completionData.symbols, isMemberCompletion = completionData.isMemberCompletion, isNewIdentifierLocation = completionData.isNewIdentifierLocation, location = completionData.location, isJsDocTagName = completionData.isJsDocTagName;
+            if (isJsDocTagName) {
+                // If the current position is a jsDoc tag name, only tag names should be provided for completion
+                return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: getAllJsDocCompletionEntries() };
+            }
+            var entries = [];
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                var uniqueNames = getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ false);
+                ts.addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames));
+            }
+            else {
+                if (!symbols || symbols.length === 0) {
+                    if (sourceFile.languageVariant === 1 /* JSX */ &&
+                        location.parent && location.parent.kind === 245 /* JsxClosingElement */) {
+                        // In the TypeScript JSX element, if such element is not defined. When users query for completion at closing tag,
+                        // instead of simply giving unknown value, the completion will return the tag-name of an associated opening-element.
+                        // For example:
+                        //     var x = <div> </ /*1*/>  completion list at "1" will contain "div" with type any
+                        var tagName = location.parent.parent.openingElement.tagName;
+                        entries.push({
+                            name: tagName.text,
+                            kind: undefined,
+                            kindModifiers: undefined,
+                            sortText: "0"
+                        });
+                    }
+                    else {
+                        return undefined;
+                    }
+                }
+                getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ true);
+            }
+            // Add keywords if this is not a member completion list
+            if (!isMemberCompletion && !isJsDocTagName) {
+                ts.addRange(entries, keywordCompletions);
+            }
+            return { isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries: entries };
+            function getJavaScriptCompletionEntries(sourceFile, position, uniqueNames) {
+                var entries = [];
+                var target = program.getCompilerOptions().target;
+                var nameTable = getNameTable(sourceFile);
+                for (var name_41 in nameTable) {
+                    // Skip identifiers produced only from the current location
+                    if (nameTable[name_41] === position) {
+                        continue;
+                    }
+                    if (!uniqueNames[name_41]) {
+                        uniqueNames[name_41] = name_41;
+                        var displayName = getCompletionEntryDisplayName(name_41, target, /*performCharacterChecks*/ true);
+                        if (displayName) {
+                            var entry = {
+                                name: displayName,
+                                kind: ScriptElementKind.warning,
+                                kindModifiers: "",
+                                sortText: "1"
+                            };
+                            entries.push(entry);
+                        }
+                    }
+                }
+                return entries;
+            }
+            function getAllJsDocCompletionEntries() {
+                return jsDocCompletionEntries || (jsDocCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
+                    return {
+                        name: tagName,
+                        kind: ScriptElementKind.keyword,
+                        kindModifiers: "",
+                        sortText: "0"
+                    };
+                }));
+            }
+            function createCompletionEntry(symbol, location, performCharacterChecks) {
+                // Try to get a valid display name for this symbol, if we could not find one, then ignore it.
+                // We would like to only show things that can be added after a dot, so for instance numeric properties can
+                // not be accessed with a dot (a.1 <- invalid)
+                var displayName = getCompletionEntryDisplayNameForSymbol(symbol, program.getCompilerOptions().target, performCharacterChecks, location);
+                if (!displayName) {
+                    return undefined;
+                }
+                // TODO(drosen): Right now we just permit *all* semantic meanings when calling
+                // 'getSymbolKind' which is permissible given that it is backwards compatible; but
+                // really we should consider passing the meaning for the node so that we don't report
+                // that a suggestion for a value is an interface.  We COULD also just do what
+                // 'getSymbolModifiers' does, which is to use the first declaration.
+                // Use a 'sortText' of 0' so that all symbol completion entries come before any other
+                // entries (like JavaScript identifier entries).
+                return {
+                    name: displayName,
+                    kind: getSymbolKind(symbol, location),
+                    kindModifiers: getSymbolModifiers(symbol),
+                    sortText: "0"
+                };
+            }
+            function getCompletionEntriesFromSymbols(symbols, entries, location, performCharacterChecks) {
+                var start = new Date().getTime();
+                var uniqueNames = {};
+                if (symbols) {
+                    for (var _i = 0, symbols_4 = symbols; _i < symbols_4.length; _i++) {
+                        var symbol = symbols_4[_i];
+                        var entry = createCompletionEntry(symbol, location, performCharacterChecks);
+                        if (entry) {
+                            var id = ts.escapeIdentifier(entry.name);
+                            if (!ts.lookUp(uniqueNames, id)) {
+                                entries.push(entry);
+                                uniqueNames[id] = id;
+                            }
+                        }
+                    }
+                }
+                log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (new Date().getTime() - start));
+                return uniqueNames;
+            }
+            function getStringLiteralCompletionEntries(sourceFile, position) {
+                var node = ts.findPrecedingToken(position, sourceFile);
+                if (!node || node.kind !== 9 /* StringLiteral */) {
+                    return undefined;
+                }
+                var argumentInfo = ts.SignatureHelp.getContainingArgumentInfo(node, position, sourceFile);
+                if (argumentInfo) {
+                    // Get string literal completions from specialized signatures of the target
+                    return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo);
+                }
+                else if (ts.isElementAccessExpression(node.parent) && node.parent.argumentExpression === node) {
+                    // Get all names of properties on the expression
+                    return getStringLiteralCompletionEntriesFromElementAccess(node.parent);
+                }
+                else {
+                    // Otherwise, get the completions from the contextual type if one exists
+                    return getStringLiteralCompletionEntriesFromContextualType(node);
+                }
+            }
+            function getStringLiteralCompletionEntriesFromCallExpression(argumentInfo) {
+                var typeChecker = program.getTypeChecker();
+                var candidates = [];
+                var entries = [];
+                typeChecker.getResolvedSignature(argumentInfo.invocation, candidates);
+                for (var _i = 0, candidates_3 = candidates; _i < candidates_3.length; _i++) {
+                    var candidate = candidates_3[_i];
+                    if (candidate.parameters.length > argumentInfo.argumentIndex) {
+                        var parameter = candidate.parameters[argumentInfo.argumentIndex];
+                        addStringLiteralCompletionsFromType(typeChecker.getTypeAtLocation(parameter.valueDeclaration), entries);
+                    }
+                }
+                if (entries.length) {
+                    return { isMemberCompletion: false, isNewIdentifierLocation: true, entries: entries };
+                }
+                return undefined;
+            }
+            function getStringLiteralCompletionEntriesFromElementAccess(node) {
+                var typeChecker = program.getTypeChecker();
+                var type = typeChecker.getTypeAtLocation(node.expression);
+                var entries = [];
+                if (type) {
+                    getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, node, /*performCharacterChecks*/ false);
+                    if (entries.length) {
+                        return { isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
+                    }
+                }
+                return undefined;
+            }
+            function getStringLiteralCompletionEntriesFromContextualType(node) {
+                var typeChecker = program.getTypeChecker();
+                var type = typeChecker.getContextualType(node);
+                if (type) {
+                    var entries_1 = [];
+                    addStringLiteralCompletionsFromType(type, entries_1);
+                    if (entries_1.length) {
+                        return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: entries_1 };
+                    }
+                }
+                return undefined;
+            }
+            function addStringLiteralCompletionsFromType(type, result) {
+                if (!type) {
+                    return;
+                }
+                if (type.flags & 16384 /* Union */) {
+                    ts.forEach(type.types, function (t) { return addStringLiteralCompletionsFromType(t, result); });
+                }
+                else {
+                    if (type.flags & 256 /* StringLiteral */) {
+                        result.push({
+                            name: type.text,
+                            kindModifiers: ScriptElementKindModifier.none,
+                            kind: ScriptElementKind.variableElement,
+                            sortText: "0"
+                        });
+                    }
+                }
+            }
+        }
+        function getCompletionEntryDetails(fileName, position, entryName) {
+            synchronizeHostData();
+            // Compute all the completion symbols again.
+            var completionData = getCompletionData(fileName, position);
+            if (completionData) {
+                var symbols = completionData.symbols, location_2 = completionData.location;
+                // Find the symbol with the matching entry name.
+                var target_2 = program.getCompilerOptions().target;
+                // We don't need to perform character checks here because we're only comparing the
+                // name against 'entryName' (which is known to be good), not building a new
+                // completion entry.
+                var symbol = ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(s, target_2, /*performCharacterChecks*/ false, location_2) === entryName ? s : undefined; });
+                if (symbol) {
+                    var _a = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, getValidSourceFile(fileName), location_2, location_2, 7 /* All */), displayParts = _a.displayParts, documentation = _a.documentation, symbolKind = _a.symbolKind;
+                    return {
+                        name: entryName,
+                        kindModifiers: getSymbolModifiers(symbol),
+                        kind: symbolKind,
+                        displayParts: displayParts,
+                        documentation: documentation
+                    };
+                }
+            }
+            // Didn't find a symbol with this name.  See if we can find a keyword instead.
+            var keywordCompletion = ts.forEach(keywordCompletions, function (c) { return c.name === entryName; });
+            if (keywordCompletion) {
+                return {
+                    name: entryName,
+                    kind: ScriptElementKind.keyword,
+                    kindModifiers: ScriptElementKindModifier.none,
+                    displayParts: [ts.displayPart(entryName, SymbolDisplayPartKind.keyword)],
+                    documentation: undefined
+                };
+            }
+            return undefined;
+        }
+        // TODO(drosen): use contextual SemanticMeaning.
+        function getSymbolKind(symbol, location) {
+            var flags = symbol.getFlags();
+            if (flags & 32 /* Class */)
+                return ts.getDeclarationOfKind(symbol, 192 /* ClassExpression */) ?
+                    ScriptElementKind.localClassElement : ScriptElementKind.classElement;
+            if (flags & 384 /* Enum */)
+                return ScriptElementKind.enumElement;
+            if (flags & 524288 /* TypeAlias */)
+                return ScriptElementKind.typeElement;
+            if (flags & 64 /* Interface */)
+                return ScriptElementKind.interfaceElement;
+            if (flags & 262144 /* TypeParameter */)
+                return ScriptElementKind.typeParameterElement;
+            var result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location);
+            if (result === ScriptElementKind.unknown) {
+                if (flags & 262144 /* TypeParameter */)
+                    return ScriptElementKind.typeParameterElement;
+                if (flags & 8 /* EnumMember */)
+                    return ScriptElementKind.variableElement;
+                if (flags & 8388608 /* Alias */)
+                    return ScriptElementKind.alias;
+                if (flags & 1536 /* Module */)
+                    return ScriptElementKind.moduleElement;
+            }
+            return result;
+        }
+        function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location) {
+            var typeChecker = program.getTypeChecker();
+            if (typeChecker.isUndefinedSymbol(symbol)) {
+                return ScriptElementKind.variableElement;
+            }
+            if (typeChecker.isArgumentsSymbol(symbol)) {
+                return ScriptElementKind.localVariableElement;
+            }
+            if (location.kind === 97 /* ThisKeyword */ && ts.isExpression(location)) {
+                return ScriptElementKind.parameterElement;
+            }
+            if (flags & 3 /* Variable */) {
+                if (ts.isFirstDeclarationOfSymbolParameter(symbol)) {
+                    return ScriptElementKind.parameterElement;
+                }
+                else if (symbol.valueDeclaration && ts.isConst(symbol.valueDeclaration)) {
+                    return ScriptElementKind.constElement;
+                }
+                else if (ts.forEach(symbol.declarations, ts.isLet)) {
+                    return ScriptElementKind.letElement;
+                }
+                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localVariableElement : ScriptElementKind.variableElement;
+            }
+            if (flags & 16 /* Function */)
+                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localFunctionElement : ScriptElementKind.functionElement;
+            if (flags & 32768 /* GetAccessor */)
+                return ScriptElementKind.memberGetAccessorElement;
+            if (flags & 65536 /* SetAccessor */)
+                return ScriptElementKind.memberSetAccessorElement;
+            if (flags & 8192 /* Method */)
+                return ScriptElementKind.memberFunctionElement;
+            if (flags & 16384 /* Constructor */)
+                return ScriptElementKind.constructorImplementationElement;
+            if (flags & 4 /* Property */) {
+                if (flags & 268435456 /* SyntheticProperty */) {
+                    // If union property is result of union of non method (property/accessors/variables), it is labeled as property
+                    var unionPropertyKind = ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
+                        var rootSymbolFlags = rootSymbol.getFlags();
+                        if (rootSymbolFlags & (98308 /* PropertyOrAccessor */ | 3 /* Variable */)) {
+                            return ScriptElementKind.memberVariableElement;
+                        }
+                        ts.Debug.assert(!!(rootSymbolFlags & 8192 /* Method */));
+                    });
+                    if (!unionPropertyKind) {
+                        // If this was union of all methods,
+                        // make sure it has call signatures before we can label it as method
+                        var typeOfUnionProperty = typeChecker.getTypeOfSymbolAtLocation(symbol, location);
+                        if (typeOfUnionProperty.getCallSignatures().length) {
+                            return ScriptElementKind.memberFunctionElement;
+                        }
+                        return ScriptElementKind.memberVariableElement;
+                    }
+                    return unionPropertyKind;
+                }
+                return ScriptElementKind.memberVariableElement;
+            }
+            return ScriptElementKind.unknown;
+        }
+        function getSymbolModifiers(symbol) {
+            return symbol && symbol.declarations && symbol.declarations.length > 0
+                ? ts.getNodeModifiers(symbol.declarations[0])
+                : ScriptElementKindModifier.none;
+        }
+        // TODO(drosen): Currently completion entry details passes the SemanticMeaning.All instead of using semanticMeaning of location
+        function getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, enclosingDeclaration, location, semanticMeaning) {
+            if (semanticMeaning === void 0) { semanticMeaning = getMeaningFromLocation(location); }
+            var typeChecker = program.getTypeChecker();
+            var displayParts = [];
+            var documentation;
+            var symbolFlags = symbol.flags;
+            var symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, symbolFlags, location);
+            var hasAddedSymbolInfo;
+            var isThisExpression = location.kind === 97 /* ThisKeyword */ && ts.isExpression(location);
+            var type;
+            // Class at constructor site need to be shown as constructor apart from property,method, vars
+            if (symbolKind !== ScriptElementKind.unknown || symbolFlags & 32 /* Class */ || symbolFlags & 8388608 /* Alias */) {
+                // If it is accessor they are allowed only if location is at name of the accessor
+                if (symbolKind === ScriptElementKind.memberGetAccessorElement || symbolKind === ScriptElementKind.memberSetAccessorElement) {
+                    symbolKind = ScriptElementKind.memberVariableElement;
+                }
+                var signature = void 0;
+                type = isThisExpression ? typeChecker.getTypeAtLocation(location) : typeChecker.getTypeOfSymbolAtLocation(symbol, location);
+                if (type) {
+                    if (location.parent && location.parent.kind === 172 /* PropertyAccessExpression */) {
+                        var right = location.parent.name;
+                        // Either the location is on the right of a property access, or on the left and the right is missing
+                        if (right === location || (right && right.getFullWidth() === 0)) {
+                            location = location.parent;
+                        }
+                    }
+                    // try get the call/construct signature from the type if it matches
+                    var callExpression = void 0;
+                    if (location.kind === 174 /* CallExpression */ || location.kind === 175 /* NewExpression */) {
+                        callExpression = location;
+                    }
+                    else if (isCallExpressionTarget(location) || isNewExpressionTarget(location)) {
+                        callExpression = location.parent;
+                    }
+                    if (callExpression) {
+                        var candidateSignatures = [];
+                        signature = typeChecker.getResolvedSignature(callExpression, candidateSignatures);
+                        if (!signature && candidateSignatures.length) {
+                            // Use the first candidate:
+                            signature = candidateSignatures[0];
+                        }
+                        var useConstructSignatures = callExpression.kind === 175 /* NewExpression */ || callExpression.expression.kind === 95 /* SuperKeyword */;
+                        var allSignatures = useConstructSignatures ? type.getConstructSignatures() : type.getCallSignatures();
+                        if (!ts.contains(allSignatures, signature.target) && !ts.contains(allSignatures, signature)) {
+                            // Get the first signature if there is one -- allSignatures may contain
+                            // either the original signature or its target, so check for either
+                            signature = allSignatures.length ? allSignatures[0] : undefined;
+                        }
+                        if (signature) {
+                            if (useConstructSignatures && (symbolFlags & 32 /* Class */)) {
+                                // Constructor
+                                symbolKind = ScriptElementKind.constructorImplementationElement;
+                                addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
+                            }
+                            else if (symbolFlags & 8388608 /* Alias */) {
+                                symbolKind = ScriptElementKind.alias;
+                                pushTypePart(symbolKind);
+                                displayParts.push(ts.spacePart());
+                                if (useConstructSignatures) {
+                                    displayParts.push(ts.keywordPart(92 /* NewKeyword */));
+                                    displayParts.push(ts.spacePart());
+                                }
+                                addFullSymbolName(symbol);
+                            }
+                            else {
+                                addPrefixForAnyFunctionOrVar(symbol, symbolKind);
+                            }
+                            switch (symbolKind) {
+                                case ScriptElementKind.memberVariableElement:
+                                case ScriptElementKind.variableElement:
+                                case ScriptElementKind.constElement:
+                                case ScriptElementKind.letElement:
+                                case ScriptElementKind.parameterElement:
+                                case ScriptElementKind.localVariableElement:
+                                    // If it is call or construct signature of lambda's write type name
+                                    displayParts.push(ts.punctuationPart(54 /* ColonToken */));
+                                    displayParts.push(ts.spacePart());
+                                    if (useConstructSignatures) {
+                                        displayParts.push(ts.keywordPart(92 /* NewKeyword */));
+                                        displayParts.push(ts.spacePart());
+                                    }
+                                    if (!(type.flags & 65536 /* Anonymous */) && type.symbol) {
+                                        ts.addRange(displayParts, ts.symbolToDisplayParts(typeChecker, type.symbol, enclosingDeclaration, /*meaning*/ undefined, 1 /* WriteTypeParametersOrArguments */));
+                                    }
+                                    addSignatureDisplayParts(signature, allSignatures, 8 /* WriteArrowStyleSignature */);
+                                    break;
+                                default:
+                                    // Just signature
+                                    addSignatureDisplayParts(signature, allSignatures);
+                            }
+                            hasAddedSymbolInfo = true;
+                        }
+                    }
+                    else if ((isNameOfFunctionDeclaration(location) && !(symbol.flags & 98304 /* Accessor */)) ||
+                        (location.kind === 121 /* ConstructorKeyword */ && location.parent.kind === 148 /* Constructor */)) {
+                        // get the signature from the declaration and write it
+                        var functionDeclaration = location.parent;
+                        var allSignatures = functionDeclaration.kind === 148 /* Constructor */ ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
+                        if (!typeChecker.isImplementationOfOverload(functionDeclaration)) {
+                            signature = typeChecker.getSignatureFromDeclaration(functionDeclaration);
+                        }
+                        else {
+                            signature = allSignatures[0];
+                        }
+                        if (functionDeclaration.kind === 148 /* Constructor */) {
+                            // show (constructor) Type(...) signature
+                            symbolKind = ScriptElementKind.constructorImplementationElement;
+                            addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
+                        }
+                        else {
+                            // (function/method) symbol(..signature)
+                            addPrefixForAnyFunctionOrVar(functionDeclaration.kind === 151 /* CallSignature */ &&
+                                !(type.symbol.flags & 2048 /* TypeLiteral */ || type.symbol.flags & 4096 /* ObjectLiteral */) ? type.symbol : symbol, symbolKind);
+                        }
+                        addSignatureDisplayParts(signature, allSignatures);
+                        hasAddedSymbolInfo = true;
+                    }
+                }
+            }
+            if (symbolFlags & 32 /* Class */ && !hasAddedSymbolInfo && !isThisExpression) {
+                if (ts.getDeclarationOfKind(symbol, 192 /* ClassExpression */)) {
+                    // Special case for class expressions because we would like to indicate that
+                    // the class name is local to the class body (similar to function expression)
+                    //      (local class) class <className>
+                    pushTypePart(ScriptElementKind.localClassElement);
+                }
+                else {
+                    // Class declaration has name which is not local.
+                    displayParts.push(ts.keywordPart(73 /* ClassKeyword */));
+                }
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                writeTypeParametersOfSymbol(symbol, sourceFile);
+            }
+            if ((symbolFlags & 64 /* Interface */) && (semanticMeaning & 2 /* Type */)) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.keywordPart(107 /* InterfaceKeyword */));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                writeTypeParametersOfSymbol(symbol, sourceFile);
+            }
+            if (symbolFlags & 524288 /* TypeAlias */) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.keywordPart(134 /* TypeKeyword */));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                writeTypeParametersOfSymbol(symbol, sourceFile);
+                displayParts.push(ts.spacePart());
+                displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                displayParts.push(ts.spacePart());
+                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, typeChecker.getDeclaredTypeOfSymbol(symbol), enclosingDeclaration));
+            }
+            if (symbolFlags & 384 /* Enum */) {
+                addNewLineIfDisplayPartsExist();
+                if (ts.forEach(symbol.declarations, ts.isConstEnumDeclaration)) {
+                    displayParts.push(ts.keywordPart(74 /* ConstKeyword */));
+                    displayParts.push(ts.spacePart());
+                }
+                displayParts.push(ts.keywordPart(81 /* EnumKeyword */));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+            }
+            if (symbolFlags & 1536 /* Module */) {
+                addNewLineIfDisplayPartsExist();
+                var declaration = ts.getDeclarationOfKind(symbol, 225 /* ModuleDeclaration */);
+                var isNamespace = declaration && declaration.name && declaration.name.kind === 69 /* Identifier */;
+                displayParts.push(ts.keywordPart(isNamespace ? 126 /* NamespaceKeyword */ : 125 /* ModuleKeyword */));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+            }
+            if ((symbolFlags & 262144 /* TypeParameter */) && (semanticMeaning & 2 /* Type */)) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                displayParts.push(ts.textPart("type parameter"));
+                displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                displayParts.push(ts.spacePart());
+                displayParts.push(ts.keywordPart(90 /* InKeyword */));
+                displayParts.push(ts.spacePart());
+                if (symbol.parent) {
+                    // Class/Interface type parameter
+                    addFullSymbolName(symbol.parent, enclosingDeclaration);
+                    writeTypeParametersOfSymbol(symbol.parent, enclosingDeclaration);
+                }
+                else {
+                    // Method/function type parameter
+                    var declaration = ts.getDeclarationOfKind(symbol, 141 /* TypeParameter */);
+                    ts.Debug.assert(declaration !== undefined);
+                    declaration = declaration.parent;
+                    if (declaration) {
+                        if (ts.isFunctionLikeKind(declaration.kind)) {
+                            var signature = typeChecker.getSignatureFromDeclaration(declaration);
+                            if (declaration.kind === 152 /* ConstructSignature */) {
+                                displayParts.push(ts.keywordPart(92 /* NewKeyword */));
+                                displayParts.push(ts.spacePart());
+                            }
+                            else if (declaration.kind !== 151 /* CallSignature */ && declaration.name) {
+                                addFullSymbolName(declaration.symbol);
+                            }
+                            ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, sourceFile, 32 /* WriteTypeArgumentsOfSignature */));
+                        }
+                        else {
+                            // Type alias type parameter
+                            // For example
+                            //      type list<T> = T[];  // Both T will go through same code path
+                            displayParts.push(ts.keywordPart(134 /* TypeKeyword */));
+                            displayParts.push(ts.spacePart());
+                            addFullSymbolName(declaration.symbol);
+                            writeTypeParametersOfSymbol(declaration.symbol, sourceFile);
+                        }
+                    }
+                }
+            }
+            if (symbolFlags & 8 /* EnumMember */) {
+                addPrefixForAnyFunctionOrVar(symbol, "enum member");
+                var declaration = symbol.declarations[0];
+                if (declaration.kind === 255 /* EnumMember */) {
+                    var constantValue = typeChecker.getConstantValue(declaration);
+                    if (constantValue !== undefined) {
+                        displayParts.push(ts.spacePart());
+                        displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                        displayParts.push(ts.spacePart());
+                        displayParts.push(ts.displayPart(constantValue.toString(), SymbolDisplayPartKind.numericLiteral));
+                    }
+                }
+            }
+            if (symbolFlags & 8388608 /* Alias */) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.keywordPart(89 /* ImportKeyword */));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                ts.forEach(symbol.declarations, function (declaration) {
+                    if (declaration.kind === 229 /* ImportEqualsDeclaration */) {
+                        var importEqualsDeclaration = declaration;
+                        if (ts.isExternalModuleImportEqualsDeclaration(importEqualsDeclaration)) {
+                            displayParts.push(ts.spacePart());
+                            displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                            displayParts.push(ts.spacePart());
+                            displayParts.push(ts.keywordPart(129 /* RequireKeyword */));
+                            displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                            displayParts.push(ts.displayPart(ts.getTextOfNode(ts.getExternalModuleImportEqualsDeclarationExpression(importEqualsDeclaration)), SymbolDisplayPartKind.stringLiteral));
+                            displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                        }
+                        else {
+                            var internalAliasSymbol = typeChecker.getSymbolAtLocation(importEqualsDeclaration.moduleReference);
+                            if (internalAliasSymbol) {
+                                displayParts.push(ts.spacePart());
+                                displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                                displayParts.push(ts.spacePart());
+                                addFullSymbolName(internalAliasSymbol, enclosingDeclaration);
+                            }
+                        }
+                        return true;
+                    }
+                });
+            }
+            if (!hasAddedSymbolInfo) {
+                if (symbolKind !== ScriptElementKind.unknown) {
+                    if (type) {
+                        if (isThisExpression) {
+                            addNewLineIfDisplayPartsExist();
+                            displayParts.push(ts.keywordPart(97 /* ThisKeyword */));
+                        }
+                        else {
+                            addPrefixForAnyFunctionOrVar(symbol, symbolKind);
+                        }
+                        // For properties, variables and local vars: show the type
+                        if (symbolKind === ScriptElementKind.memberVariableElement ||
+                            symbolFlags & 3 /* Variable */ ||
+                            symbolKind === ScriptElementKind.localVariableElement ||
+                            isThisExpression) {
+                            displayParts.push(ts.punctuationPart(54 /* ColonToken */));
+                            displayParts.push(ts.spacePart());
+                            // If the type is type parameter, format it specially
+                            if (type.symbol && type.symbol.flags & 262144 /* TypeParameter */) {
+                                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
+                                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(type, writer, enclosingDeclaration);
+                                });
+                                ts.addRange(displayParts, typeParameterParts);
+                            }
+                            else {
+                                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, type, enclosingDeclaration));
+                            }
+                        }
+                        else if (symbolFlags & 16 /* Function */ ||
+                            symbolFlags & 8192 /* Method */ ||
+                            symbolFlags & 16384 /* Constructor */ ||
+                            symbolFlags & 131072 /* Signature */ ||
+                            symbolFlags & 98304 /* Accessor */ ||
+                            symbolKind === ScriptElementKind.memberFunctionElement) {
+                            var allSignatures = type.getNonNullableType().getCallSignatures();
+                            addSignatureDisplayParts(allSignatures[0], allSignatures);
+                        }
+                    }
+                }
+                else {
+                    symbolKind = getSymbolKind(symbol, location);
+                }
+            }
+            if (!documentation) {
+                documentation = symbol.getDocumentationComment();
+            }
+            return { displayParts: displayParts, documentation: documentation, symbolKind: symbolKind };
+            function addNewLineIfDisplayPartsExist() {
+                if (displayParts.length) {
+                    displayParts.push(ts.lineBreakPart());
+                }
+            }
+            function addFullSymbolName(symbol, enclosingDeclaration) {
+                var fullSymbolDisplayParts = ts.symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration || sourceFile, /*meaning*/ undefined, 1 /* WriteTypeParametersOrArguments */ | 2 /* UseOnlyExternalAliasing */);
+                ts.addRange(displayParts, fullSymbolDisplayParts);
+            }
+            function addPrefixForAnyFunctionOrVar(symbol, symbolKind) {
+                addNewLineIfDisplayPartsExist();
+                if (symbolKind) {
+                    pushTypePart(symbolKind);
+                    displayParts.push(ts.spacePart());
+                    addFullSymbolName(symbol);
+                }
+            }
+            function pushTypePart(symbolKind) {
+                switch (symbolKind) {
+                    case ScriptElementKind.variableElement:
+                    case ScriptElementKind.functionElement:
+                    case ScriptElementKind.letElement:
+                    case ScriptElementKind.constElement:
+                    case ScriptElementKind.constructorImplementationElement:
+                        displayParts.push(ts.textOrKeywordPart(symbolKind));
+                        return;
+                    default:
+                        displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                        displayParts.push(ts.textOrKeywordPart(symbolKind));
+                        displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                        return;
+                }
+            }
+            function addSignatureDisplayParts(signature, allSignatures, flags) {
+                ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, enclosingDeclaration, flags | 32 /* WriteTypeArgumentsOfSignature */));
+                if (allSignatures.length > 1) {
+                    displayParts.push(ts.spacePart());
+                    displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                    displayParts.push(ts.operatorPart(35 /* PlusToken */));
+                    displayParts.push(ts.displayPart((allSignatures.length - 1).toString(), SymbolDisplayPartKind.numericLiteral));
+                    displayParts.push(ts.spacePart());
+                    displayParts.push(ts.textPart(allSignatures.length === 2 ? "overload" : "overloads"));
+                    displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                }
+                documentation = signature.getDocumentationComment();
+            }
+            function writeTypeParametersOfSymbol(symbol, enclosingDeclaration) {
+                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
+                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration);
+                });
+                ts.addRange(displayParts, typeParameterParts);
+            }
+        }
+        function getQuickInfoAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, position);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            if (isLabelName(node)) {
+                return undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol || typeChecker.isUnknownSymbol(symbol)) {
+                // Try getting just type at this position and show
+                switch (node.kind) {
+                    case 69 /* Identifier */:
+                    case 172 /* PropertyAccessExpression */:
+                    case 139 /* QualifiedName */:
+                    case 97 /* ThisKeyword */:
+                    case 165 /* ThisType */:
+                    case 95 /* SuperKeyword */:
+                        // For the identifiers/this/super etc get the type at position
+                        var type = typeChecker.getTypeAtLocation(node);
+                        if (type) {
+                            return {
+                                kind: ScriptElementKind.unknown,
+                                kindModifiers: ScriptElementKindModifier.none,
+                                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
+                                displayParts: ts.typeToDisplayParts(typeChecker, type, getContainerNode(node)),
+                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined
+                            };
+                        }
+                }
+                return undefined;
+            }
+            var displayPartsDocumentationsAndKind = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, getContainerNode(node), node);
+            return {
+                kind: displayPartsDocumentationsAndKind.symbolKind,
+                kindModifiers: getSymbolModifiers(symbol),
+                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
+                displayParts: displayPartsDocumentationsAndKind.displayParts,
+                documentation: displayPartsDocumentationsAndKind.documentation
+            };
+        }
+        function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
+            return {
+                fileName: node.getSourceFile().fileName,
+                textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
+                kind: symbolKind,
+                name: symbolName,
+                containerKind: undefined,
+                containerName: containerName
+            };
+        }
+        function getDefinitionFromSymbol(symbol, node) {
+            var typeChecker = program.getTypeChecker();
+            var result = [];
+            var declarations = symbol.getDeclarations();
+            var symbolName = typeChecker.symbolToString(symbol); // Do not get scoped name, just the name of the symbol
+            var symbolKind = getSymbolKind(symbol, node);
+            var containerSymbol = symbol.parent;
+            var containerName = containerSymbol ? typeChecker.symbolToString(containerSymbol, node) : "";
+            if (!tryAddConstructSignature(symbol, node, symbolKind, symbolName, containerName, result) &&
+                !tryAddCallSignature(symbol, node, symbolKind, symbolName, containerName, result)) {
+                // Just add all the declarations.
+                ts.forEach(declarations, function (declaration) {
+                    result.push(createDefinitionInfo(declaration, symbolKind, symbolName, containerName));
+                });
+            }
+            return result;
+            function tryAddConstructSignature(symbol, location, symbolKind, symbolName, containerName, result) {
+                // Applicable only if we are in a new expression, or we are on a constructor declaration
+                // and in either case the symbol has a construct signature definition, i.e. class
+                if (isNewExpressionTarget(location) || location.kind === 121 /* ConstructorKeyword */) {
+                    if (symbol.flags & 32 /* Class */) {
+                        // Find the first class-like declaration and try to get the construct signature.
+                        for (var _i = 0, _a = symbol.getDeclarations(); _i < _a.length; _i++) {
+                            var declaration = _a[_i];
+                            if (ts.isClassLike(declaration)) {
+                                return tryAddSignature(declaration.members, 
+                                /*selectConstructors*/ true, symbolKind, symbolName, containerName, result);
+                            }
+                        }
+                        ts.Debug.fail("Expected declaration to have at least one class-like declaration");
+                    }
+                }
+                return false;
+            }
+            function tryAddCallSignature(symbol, location, symbolKind, symbolName, containerName, result) {
+                if (isCallExpressionTarget(location) || isNewExpressionTarget(location) || isNameOfFunctionDeclaration(location)) {
+                    return tryAddSignature(symbol.declarations, /*selectConstructors*/ false, symbolKind, symbolName, containerName, result);
+                }
+                return false;
+            }
+            function tryAddSignature(signatureDeclarations, selectConstructors, symbolKind, symbolName, containerName, result) {
+                var declarations = [];
+                var definition;
+                ts.forEach(signatureDeclarations, function (d) {
+                    if ((selectConstructors && d.kind === 148 /* Constructor */) ||
+                        (!selectConstructors && (d.kind === 220 /* FunctionDeclaration */ || d.kind === 147 /* MethodDeclaration */ || d.kind === 146 /* MethodSignature */))) {
+                        declarations.push(d);
+                        if (d.body)
+                            definition = d;
+                    }
+                });
+                if (definition) {
+                    result.push(createDefinitionInfo(definition, symbolKind, symbolName, containerName));
+                    return true;
+                }
+                else if (declarations.length) {
+                    result.push(createDefinitionInfo(ts.lastOrUndefined(declarations), symbolKind, symbolName, containerName));
+                    return true;
+                }
+                return false;
+            }
+        }
+        function findReferenceInPosition(refs, pos) {
+            for (var _i = 0, refs_1 = refs; _i < refs_1.length; _i++) {
+                var ref = refs_1[_i];
+                if (ref.pos <= pos && pos < ref.end) {
+                    return ref;
+                }
+            }
+            return undefined;
+        }
+        function getDefinitionInfoForFileReference(name, targetFileName) {
+            return {
+                fileName: targetFileName,
+                textSpan: ts.createTextSpanFromBounds(0, 0),
+                kind: ScriptElementKind.scriptElement,
+                name: name,
+                containerName: undefined,
+                containerKind: undefined
+            };
+        }
+        /// Goto definition
+        function getDefinitionAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            /// Triple slash reference comments
+            var comment = findReferenceInPosition(sourceFile.referencedFiles, position);
+            if (comment) {
+                var referenceFile = ts.tryResolveScriptReference(program, sourceFile, comment);
+                if (referenceFile) {
+                    return [getDefinitionInfoForFileReference(comment.fileName, referenceFile.fileName)];
+                }
+                return undefined;
+            }
+            // Type reference directives
+            var typeReferenceDirective = findReferenceInPosition(sourceFile.typeReferenceDirectives, position);
+            if (typeReferenceDirective) {
+                var referenceFile = ts.lookUp(program.getResolvedTypeReferenceDirectives(), typeReferenceDirective.fileName);
+                if (referenceFile && referenceFile.resolvedFileName) {
+                    return [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
+                }
+                return undefined;
+            }
+            var node = ts.getTouchingPropertyName(sourceFile, position);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            // Labels
+            if (isJumpStatementTarget(node)) {
+                var labelName = node.text;
+                var label = getTargetLabel(node.parent, node.text);
+                return label ? [createDefinitionInfo(label, ScriptElementKind.label, labelName, /*containerName*/ undefined)] : undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            // Could not find a symbol e.g. node is string or number keyword,
+            // or the symbol was an internal symbol and does not have a declaration e.g. undefined symbol
+            if (!symbol) {
+                return undefined;
+            }
+            // If this is an alias, and the request came at the declaration location
+            // get the aliased symbol instead. This allows for goto def on an import e.g.
+            //   import {A, B} from "mod";
+            // to jump to the implementation directly.
+            if (symbol.flags & 8388608 /* Alias */) {
+                var declaration = symbol.declarations[0];
+                // Go to the original declaration for cases:
+                //
+                //   (1) when the aliased symbol was declared in the location(parent).
+                //   (2) when the aliased symbol is originating from a named import.
+                //
+                if (node.kind === 69 /* Identifier */ &&
+                    (node.parent === declaration ||
+                        (declaration.kind === 234 /* ImportSpecifier */ && declaration.parent && declaration.parent.kind === 233 /* NamedImports */))) {
+                    symbol = typeChecker.getAliasedSymbol(symbol);
+                }
+            }
+            // Because name in short-hand property assignment has two different meanings: property name and property value,
+            // using go-to-definition at such position should go to the variable declaration of the property value rather than
+            // go to the declaration of the property name (in this case stay at the same position). However, if go-to-definition
+            // is performed at the location of property access, we would like to go to definition of the property in the short-hand
+            // assignment. This case and others are handled by the following code.
+            if (node.parent.kind === 254 /* ShorthandPropertyAssignment */) {
+                var shorthandSymbol = typeChecker.getShorthandAssignmentValueSymbol(symbol.valueDeclaration);
+                if (!shorthandSymbol) {
+                    return [];
+                }
+                var shorthandDeclarations = shorthandSymbol.getDeclarations();
+                var shorthandSymbolKind_1 = getSymbolKind(shorthandSymbol, node);
+                var shorthandSymbolName_1 = typeChecker.symbolToString(shorthandSymbol);
+                var shorthandContainerName_1 = typeChecker.symbolToString(symbol.parent, node);
+                return ts.map(shorthandDeclarations, function (declaration) { return createDefinitionInfo(declaration, shorthandSymbolKind_1, shorthandSymbolName_1, shorthandContainerName_1); });
+            }
+            return getDefinitionFromSymbol(symbol, node);
+        }
+        /// Goto type
+        function getTypeDefinitionAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, position);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol) {
+                return undefined;
+            }
+            var type = typeChecker.getTypeOfSymbolAtLocation(symbol, node);
+            if (!type) {
+                return undefined;
+            }
+            if (type.flags & 16384 /* Union */) {
+                var result_3 = [];
+                ts.forEach(type.types, function (t) {
+                    if (t.symbol) {
+                        ts.addRange(/*to*/ result_3, /*from*/ getDefinitionFromSymbol(t.symbol, node));
+                    }
+                });
+                return result_3;
+            }
+            if (!type.symbol) {
+                return undefined;
+            }
+            return getDefinitionFromSymbol(type.symbol, node);
+        }
+        function getOccurrencesAtPosition(fileName, position) {
+            var results = getOccurrencesAtPositionCore(fileName, position);
+            if (results) {
+                var sourceFile_1 = getCanonicalFileName(ts.normalizeSlashes(fileName));
+                // Get occurrences only supports reporting occurrences for the file queried.  So
+                // filter down to that list.
+                results = ts.filter(results, function (r) { return getCanonicalFileName(ts.normalizeSlashes(r.fileName)) === sourceFile_1; });
+            }
+            return results;
+        }
+        function getDocumentHighlights(fileName, position, filesToSearch) {
+            synchronizeHostData();
+            var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingWord(sourceFile, position);
+            if (!node) {
+                return undefined;
+            }
+            return getSemanticDocumentHighlights(node) || getSyntacticDocumentHighlights(node);
+            function getHighlightSpanForNode(node) {
+                var start = node.getStart();
+                var end = node.getEnd();
+                return {
+                    fileName: sourceFile.fileName,
+                    textSpan: ts.createTextSpanFromBounds(start, end),
+                    kind: HighlightSpanKind.none
+                };
+            }
+            function getSemanticDocumentHighlights(node) {
+                if (node.kind === 69 /* Identifier */ ||
+                    node.kind === 97 /* ThisKeyword */ ||
+                    node.kind === 165 /* ThisType */ ||
+                    node.kind === 95 /* SuperKeyword */ ||
+                    node.kind === 9 /* StringLiteral */ ||
+                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                    var referencedSymbols = getReferencedSymbolsForNode(node, sourceFilesToSearch, /*findInStrings*/ false, /*findInComments*/ false);
+                    return convertReferencedSymbols(referencedSymbols);
+                }
+                return undefined;
+                function convertReferencedSymbols(referencedSymbols) {
+                    if (!referencedSymbols) {
+                        return undefined;
+                    }
+                    var fileNameToDocumentHighlights = {};
+                    var result = [];
+                    for (var _i = 0, referencedSymbols_1 = referencedSymbols; _i < referencedSymbols_1.length; _i++) {
+                        var referencedSymbol = referencedSymbols_1[_i];
+                        for (var _a = 0, _b = referencedSymbol.references; _a < _b.length; _a++) {
+                            var referenceEntry = _b[_a];
+                            var fileName_1 = referenceEntry.fileName;
+                            var documentHighlights = ts.getProperty(fileNameToDocumentHighlights, fileName_1);
+                            if (!documentHighlights) {
+                                documentHighlights = { fileName: fileName_1, highlightSpans: [] };
+                                fileNameToDocumentHighlights[fileName_1] = documentHighlights;
+                                result.push(documentHighlights);
+                            }
+                            documentHighlights.highlightSpans.push({
+                                textSpan: referenceEntry.textSpan,
+                                kind: referenceEntry.isWriteAccess ? HighlightSpanKind.writtenReference : HighlightSpanKind.reference
+                            });
+                        }
+                    }
+                    return result;
+                }
+            }
+            function getSyntacticDocumentHighlights(node) {
+                var fileName = sourceFile.fileName;
+                var highlightSpans = getHighlightSpans(node);
+                if (!highlightSpans || highlightSpans.length === 0) {
+                    return undefined;
+                }
+                return [{ fileName: fileName, highlightSpans: highlightSpans }];
+                // returns true if 'node' is defined and has a matching 'kind'.
+                function hasKind(node, kind) {
+                    return node !== undefined && node.kind === kind;
+                }
+                // Null-propagating 'parent' function.
+                function parent(node) {
+                    return node && node.parent;
+                }
+                function getHighlightSpans(node) {
+                    if (node) {
+                        switch (node.kind) {
+                            case 88 /* IfKeyword */:
+                            case 80 /* ElseKeyword */:
+                                if (hasKind(node.parent, 203 /* IfStatement */)) {
+                                    return getIfElseOccurrences(node.parent);
+                                }
+                                break;
+                            case 94 /* ReturnKeyword */:
+                                if (hasKind(node.parent, 211 /* ReturnStatement */)) {
+                                    return getReturnOccurrences(node.parent);
+                                }
+                                break;
+                            case 98 /* ThrowKeyword */:
+                                if (hasKind(node.parent, 215 /* ThrowStatement */)) {
+                                    return getThrowOccurrences(node.parent);
+                                }
+                                break;
+                            case 72 /* CatchKeyword */:
+                                if (hasKind(parent(parent(node)), 216 /* TryStatement */)) {
+                                    return getTryCatchFinallyOccurrences(node.parent.parent);
+                                }
+                                break;
+                            case 100 /* TryKeyword */:
+                            case 85 /* FinallyKeyword */:
+                                if (hasKind(parent(node), 216 /* TryStatement */)) {
+                                    return getTryCatchFinallyOccurrences(node.parent);
+                                }
+                                break;
+                            case 96 /* SwitchKeyword */:
+                                if (hasKind(node.parent, 213 /* SwitchStatement */)) {
+                                    return getSwitchCaseDefaultOccurrences(node.parent);
+                                }
+                                break;
+                            case 71 /* CaseKeyword */:
+                            case 77 /* DefaultKeyword */:
+                                if (hasKind(parent(parent(parent(node))), 213 /* SwitchStatement */)) {
+                                    return getSwitchCaseDefaultOccurrences(node.parent.parent.parent);
+                                }
+                                break;
+                            case 70 /* BreakKeyword */:
+                            case 75 /* ContinueKeyword */:
+                                if (hasKind(node.parent, 210 /* BreakStatement */) || hasKind(node.parent, 209 /* ContinueStatement */)) {
+                                    return getBreakOrContinueStatementOccurrences(node.parent);
+                                }
+                                break;
+                            case 86 /* ForKeyword */:
+                                if (hasKind(node.parent, 206 /* ForStatement */) ||
+                                    hasKind(node.parent, 207 /* ForInStatement */) ||
+                                    hasKind(node.parent, 208 /* ForOfStatement */)) {
+                                    return getLoopBreakContinueOccurrences(node.parent);
+                                }
+                                break;
+                            case 104 /* WhileKeyword */:
+                            case 79 /* DoKeyword */:
+                                if (hasKind(node.parent, 205 /* WhileStatement */) || hasKind(node.parent, 204 /* DoStatement */)) {
+                                    return getLoopBreakContinueOccurrences(node.parent);
+                                }
+                                break;
+                            case 121 /* ConstructorKeyword */:
+                                if (hasKind(node.parent, 148 /* Constructor */)) {
+                                    return getConstructorOccurrences(node.parent);
+                                }
+                                break;
+                            case 123 /* GetKeyword */:
+                            case 131 /* SetKeyword */:
+                                if (hasKind(node.parent, 149 /* GetAccessor */) || hasKind(node.parent, 150 /* SetAccessor */)) {
+                                    return getGetAndSetOccurrences(node.parent);
+                                }
+                                break;
+                            default:
+                                if (ts.isModifierKind(node.kind) && node.parent &&
+                                    (ts.isDeclaration(node.parent) || node.parent.kind === 200 /* VariableStatement */)) {
+                                    return getModifierOccurrences(node.kind, node.parent);
+                                }
+                        }
+                    }
+                    return undefined;
+                }
+                /**
+                 * Aggregates all throw-statements within this node *without* crossing
+                 * into function boundaries and try-blocks with catch-clauses.
+                 */
+                function aggregateOwnedThrowStatements(node) {
+                    var statementAccumulator = [];
+                    aggregate(node);
+                    return statementAccumulator;
+                    function aggregate(node) {
+                        if (node.kind === 215 /* ThrowStatement */) {
+                            statementAccumulator.push(node);
+                        }
+                        else if (node.kind === 216 /* TryStatement */) {
+                            var tryStatement = node;
+                            if (tryStatement.catchClause) {
+                                aggregate(tryStatement.catchClause);
+                            }
+                            else {
+                                // Exceptions thrown within a try block lacking a catch clause
+                                // are "owned" in the current context.
+                                aggregate(tryStatement.tryBlock);
+                            }
+                            if (tryStatement.finallyBlock) {
+                                aggregate(tryStatement.finallyBlock);
+                            }
+                        }
+                        else if (!ts.isFunctionLike(node)) {
+                            ts.forEachChild(node, aggregate);
+                        }
+                    }
+                }
+                /**
+                 * For lack of a better name, this function takes a throw statement and returns the
+                 * nearest ancestor that is a try-block (whose try statement has a catch clause),
+                 * function-block, or source file.
+                 */
+                function getThrowStatementOwner(throwStatement) {
+                    var child = throwStatement;
+                    while (child.parent) {
+                        var parent_19 = child.parent;
+                        if (ts.isFunctionBlock(parent_19) || parent_19.kind === 256 /* SourceFile */) {
+                            return parent_19;
+                        }
+                        // A throw-statement is only owned by a try-statement if the try-statement has
+                        // a catch clause, and if the throw-statement occurs within the try block.
+                        if (parent_19.kind === 216 /* TryStatement */) {
+                            var tryStatement = parent_19;
+                            if (tryStatement.tryBlock === child && tryStatement.catchClause) {
+                                return child;
+                            }
+                        }
+                        child = parent_19;
+                    }
+                    return undefined;
+                }
+                function aggregateAllBreakAndContinueStatements(node) {
+                    var statementAccumulator = [];
+                    aggregate(node);
+                    return statementAccumulator;
+                    function aggregate(node) {
+                        if (node.kind === 210 /* BreakStatement */ || node.kind === 209 /* ContinueStatement */) {
+                            statementAccumulator.push(node);
+                        }
+                        else if (!ts.isFunctionLike(node)) {
+                            ts.forEachChild(node, aggregate);
+                        }
+                    }
+                }
+                function ownsBreakOrContinueStatement(owner, statement) {
+                    var actualOwner = getBreakOrContinueOwner(statement);
+                    return actualOwner && actualOwner === owner;
+                }
+                function getBreakOrContinueOwner(statement) {
+                    for (var node_1 = statement.parent; node_1; node_1 = node_1.parent) {
+                        switch (node_1.kind) {
+                            case 213 /* SwitchStatement */:
+                                if (statement.kind === 209 /* ContinueStatement */) {
+                                    continue;
+                                }
+                            // Fall through.
+                            case 206 /* ForStatement */:
+                            case 207 /* ForInStatement */:
+                            case 208 /* ForOfStatement */:
+                            case 205 /* WhileStatement */:
+                            case 204 /* DoStatement */:
+                                if (!statement.label || isLabeledBy(node_1, statement.label.text)) {
+                                    return node_1;
+                                }
+                                break;
+                            default:
+                                // Don't cross function boundaries.
+                                if (ts.isFunctionLike(node_1)) {
+                                    return undefined;
+                                }
+                                break;
+                        }
+                    }
+                    return undefined;
+                }
+                function getModifierOccurrences(modifier, declaration) {
+                    var container = declaration.parent;
+                    // Make sure we only highlight the keyword when it makes sense to do so.
+                    if (ts.isAccessibilityModifier(modifier)) {
+                        if (!(container.kind === 221 /* ClassDeclaration */ ||
+                            container.kind === 192 /* ClassExpression */ ||
+                            (declaration.kind === 142 /* Parameter */ && hasKind(container, 148 /* Constructor */)))) {
+                            return undefined;
+                        }
+                    }
+                    else if (modifier === 113 /* StaticKeyword */) {
+                        if (!(container.kind === 221 /* ClassDeclaration */ || container.kind === 192 /* ClassExpression */)) {
+                            return undefined;
+                        }
+                    }
+                    else if (modifier === 82 /* ExportKeyword */ || modifier === 122 /* DeclareKeyword */) {
+                        if (!(container.kind === 226 /* ModuleBlock */ || container.kind === 256 /* SourceFile */)) {
+                            return undefined;
+                        }
+                    }
+                    else if (modifier === 115 /* AbstractKeyword */) {
+                        if (!(container.kind === 221 /* ClassDeclaration */ || declaration.kind === 221 /* ClassDeclaration */)) {
+                            return undefined;
+                        }
+                    }
+                    else {
+                        // unsupported modifier
+                        return undefined;
+                    }
+                    var keywords = [];
+                    var modifierFlag = getFlagFromModifier(modifier);
+                    var nodes;
+                    switch (container.kind) {
+                        case 226 /* ModuleBlock */:
+                        case 256 /* SourceFile */:
+                            // Container is either a class declaration or the declaration is a classDeclaration
+                            if (modifierFlag & 128 /* Abstract */) {
+                                nodes = declaration.members.concat(declaration);
+                            }
+                            else {
+                                nodes = container.statements;
+                            }
+                            break;
+                        case 148 /* Constructor */:
+                            nodes = container.parameters.concat(container.parent.members);
+                            break;
+                        case 221 /* ClassDeclaration */:
+                        case 192 /* ClassExpression */:
+                            nodes = container.members;
+                            // If we're an accessibility modifier, we're in an instance member and should search
+                            // the constructor's parameter list for instance members as well.
+                            if (modifierFlag & 28 /* AccessibilityModifier */) {
+                                var constructor = ts.forEach(container.members, function (member) {
+                                    return member.kind === 148 /* Constructor */ && member;
+                                });
+                                if (constructor) {
+                                    nodes = nodes.concat(constructor.parameters);
+                                }
+                            }
+                            else if (modifierFlag & 128 /* Abstract */) {
+                                nodes = nodes.concat(container);
+                            }
+                            break;
+                        default:
+                            ts.Debug.fail("Invalid container kind.");
+                    }
+                    ts.forEach(nodes, function (node) {
+                        if (node.modifiers && node.flags & modifierFlag) {
+                            ts.forEach(node.modifiers, function (child) { return pushKeywordIf(keywords, child, modifier); });
+                        }
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                    function getFlagFromModifier(modifier) {
+                        switch (modifier) {
+                            case 112 /* PublicKeyword */:
+                                return 4 /* Public */;
+                            case 110 /* PrivateKeyword */:
+                                return 8 /* Private */;
+                            case 111 /* ProtectedKeyword */:
+                                return 16 /* Protected */;
+                            case 113 /* StaticKeyword */:
+                                return 32 /* Static */;
+                            case 82 /* ExportKeyword */:
+                                return 1 /* Export */;
+                            case 122 /* DeclareKeyword */:
+                                return 2 /* Ambient */;
+                            case 115 /* AbstractKeyword */:
+                                return 128 /* Abstract */;
+                            default:
+                                ts.Debug.fail();
+                        }
+                    }
+                }
+                function pushKeywordIf(keywordList, token) {
+                    var expected = [];
+                    for (var _i = 2; _i < arguments.length; _i++) {
+                        expected[_i - 2] = arguments[_i];
+                    }
+                    if (token && ts.contains(expected, token.kind)) {
+                        keywordList.push(token);
+                        return true;
+                    }
+                    return false;
+                }
+                function getGetAndSetOccurrences(accessorDeclaration) {
+                    var keywords = [];
+                    tryPushAccessorKeyword(accessorDeclaration.symbol, 149 /* GetAccessor */);
+                    tryPushAccessorKeyword(accessorDeclaration.symbol, 150 /* SetAccessor */);
+                    return ts.map(keywords, getHighlightSpanForNode);
+                    function tryPushAccessorKeyword(accessorSymbol, accessorKind) {
+                        var accessor = ts.getDeclarationOfKind(accessorSymbol, accessorKind);
+                        if (accessor) {
+                            ts.forEach(accessor.getChildren(), function (child) { return pushKeywordIf(keywords, child, 123 /* GetKeyword */, 131 /* SetKeyword */); });
+                        }
+                    }
+                }
+                function getConstructorOccurrences(constructorDeclaration) {
+                    var declarations = constructorDeclaration.symbol.getDeclarations();
+                    var keywords = [];
+                    ts.forEach(declarations, function (declaration) {
+                        ts.forEach(declaration.getChildren(), function (token) {
+                            return pushKeywordIf(keywords, token, 121 /* ConstructorKeyword */);
+                        });
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getLoopBreakContinueOccurrences(loopNode) {
+                    var keywords = [];
+                    if (pushKeywordIf(keywords, loopNode.getFirstToken(), 86 /* ForKeyword */, 104 /* WhileKeyword */, 79 /* DoKeyword */)) {
+                        // If we succeeded and got a do-while loop, then start looking for a 'while' keyword.
+                        if (loopNode.kind === 204 /* DoStatement */) {
+                            var loopTokens = loopNode.getChildren();
+                            for (var i = loopTokens.length - 1; i >= 0; i--) {
+                                if (pushKeywordIf(keywords, loopTokens[i], 104 /* WhileKeyword */)) {
+                                    break;
+                                }
+                            }
+                        }
+                    }
+                    var breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
+                    ts.forEach(breaksAndContinues, function (statement) {
+                        if (ownsBreakOrContinueStatement(loopNode, statement)) {
+                            pushKeywordIf(keywords, statement.getFirstToken(), 70 /* BreakKeyword */, 75 /* ContinueKeyword */);
+                        }
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getBreakOrContinueStatementOccurrences(breakOrContinueStatement) {
+                    var owner = getBreakOrContinueOwner(breakOrContinueStatement);
+                    if (owner) {
+                        switch (owner.kind) {
+                            case 206 /* ForStatement */:
+                            case 207 /* ForInStatement */:
+                            case 208 /* ForOfStatement */:
+                            case 204 /* DoStatement */:
+                            case 205 /* WhileStatement */:
+                                return getLoopBreakContinueOccurrences(owner);
+                            case 213 /* SwitchStatement */:
+                                return getSwitchCaseDefaultOccurrences(owner);
+                        }
+                    }
+                    return undefined;
+                }
+                function getSwitchCaseDefaultOccurrences(switchStatement) {
+                    var keywords = [];
+                    pushKeywordIf(keywords, switchStatement.getFirstToken(), 96 /* SwitchKeyword */);
+                    // Go through each clause in the switch statement, collecting the 'case'/'default' keywords.
+                    ts.forEach(switchStatement.caseBlock.clauses, function (clause) {
+                        pushKeywordIf(keywords, clause.getFirstToken(), 71 /* CaseKeyword */, 77 /* DefaultKeyword */);
+                        var breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
+                        ts.forEach(breaksAndContinues, function (statement) {
+                            if (ownsBreakOrContinueStatement(switchStatement, statement)) {
+                                pushKeywordIf(keywords, statement.getFirstToken(), 70 /* BreakKeyword */);
+                            }
+                        });
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getTryCatchFinallyOccurrences(tryStatement) {
+                    var keywords = [];
+                    pushKeywordIf(keywords, tryStatement.getFirstToken(), 100 /* TryKeyword */);
+                    if (tryStatement.catchClause) {
+                        pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), 72 /* CatchKeyword */);
+                    }
+                    if (tryStatement.finallyBlock) {
+                        var finallyKeyword = ts.findChildOfKind(tryStatement, 85 /* FinallyKeyword */, sourceFile);
+                        pushKeywordIf(keywords, finallyKeyword, 85 /* FinallyKeyword */);
+                    }
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getThrowOccurrences(throwStatement) {
+                    var owner = getThrowStatementOwner(throwStatement);
+                    if (!owner) {
+                        return undefined;
+                    }
+                    var keywords = [];
+                    ts.forEach(aggregateOwnedThrowStatements(owner), function (throwStatement) {
+                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98 /* ThrowKeyword */);
+                    });
+                    // If the "owner" is a function, then we equate 'return' and 'throw' statements in their
+                    // ability to "jump out" of the function, and include occurrences for both.
+                    if (ts.isFunctionBlock(owner)) {
+                        ts.forEachReturnStatement(owner, function (returnStatement) {
+                            pushKeywordIf(keywords, returnStatement.getFirstToken(), 94 /* ReturnKeyword */);
+                        });
+                    }
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getReturnOccurrences(returnStatement) {
+                    var func = ts.getContainingFunction(returnStatement);
+                    // If we didn't find a containing function with a block body, bail out.
+                    if (!(func && hasKind(func.body, 199 /* Block */))) {
+                        return undefined;
+                    }
+                    var keywords = [];
+                    ts.forEachReturnStatement(func.body, function (returnStatement) {
+                        pushKeywordIf(keywords, returnStatement.getFirstToken(), 94 /* ReturnKeyword */);
+                    });
+                    // Include 'throw' statements that do not occur within a try block.
+                    ts.forEach(aggregateOwnedThrowStatements(func.body), function (throwStatement) {
+                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98 /* ThrowKeyword */);
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getIfElseOccurrences(ifStatement) {
+                    var keywords = [];
+                    // Traverse upwards through all parent if-statements linked by their else-branches.
+                    while (hasKind(ifStatement.parent, 203 /* IfStatement */) && ifStatement.parent.elseStatement === ifStatement) {
+                        ifStatement = ifStatement.parent;
+                    }
+                    // Now traverse back down through the else branches, aggregating if/else keywords of if-statements.
+                    while (ifStatement) {
+                        var children = ifStatement.getChildren();
+                        pushKeywordIf(keywords, children[0], 88 /* IfKeyword */);
+                        // Generally the 'else' keyword is second-to-last, so we traverse backwards.
+                        for (var i = children.length - 1; i >= 0; i--) {
+                            if (pushKeywordIf(keywords, children[i], 80 /* ElseKeyword */)) {
+                                break;
+                            }
+                        }
+                        if (!hasKind(ifStatement.elseStatement, 203 /* IfStatement */)) {
+                            break;
+                        }
+                        ifStatement = ifStatement.elseStatement;
+                    }
+                    var result = [];
+                    // We'd like to highlight else/ifs together if they are only separated by whitespace
+                    // (i.e. the keywords are separated by no comments, no newlines).
+                    for (var i = 0; i < keywords.length; i++) {
+                        if (keywords[i].kind === 80 /* ElseKeyword */ && i < keywords.length - 1) {
+                            var elseKeyword = keywords[i];
+                            var ifKeyword = keywords[i + 1]; // this *should* always be an 'if' keyword.
+                            var shouldCombindElseAndIf = true;
+                            // Avoid recalculating getStart() by iterating backwards.
+                            for (var j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
+                                if (!ts.isWhiteSpace(sourceFile.text.charCodeAt(j))) {
+                                    shouldCombindElseAndIf = false;
+                                    break;
+                                }
+                            }
+                            if (shouldCombindElseAndIf) {
+                                result.push({
+                                    fileName: fileName,
+                                    textSpan: ts.createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
+                                    kind: HighlightSpanKind.reference
+                                });
+                                i++; // skip the next keyword
+                                continue;
+                            }
+                        }
+                        // Ordinary case: just highlight the keyword.
+                        result.push(getHighlightSpanForNode(keywords[i]));
+                    }
+                    return result;
+                }
+            }
+        }
+        /// References and Occurrences
+        function getOccurrencesAtPositionCore(fileName, position) {
+            synchronizeHostData();
+            return convertDocumentHighlights(getDocumentHighlights(fileName, position, [fileName]));
+            function convertDocumentHighlights(documentHighlights) {
+                if (!documentHighlights) {
+                    return undefined;
+                }
+                var result = [];
+                for (var _i = 0, documentHighlights_1 = documentHighlights; _i < documentHighlights_1.length; _i++) {
+                    var entry = documentHighlights_1[_i];
+                    for (var _a = 0, _b = entry.highlightSpans; _a < _b.length; _a++) {
+                        var highlightSpan = _b[_a];
+                        result.push({
+                            fileName: entry.fileName,
+                            textSpan: highlightSpan.textSpan,
+                            isWriteAccess: highlightSpan.kind === HighlightSpanKind.writtenReference
+                        });
+                    }
+                }
+                return result;
+            }
+        }
+        function convertReferences(referenceSymbols) {
+            if (!referenceSymbols) {
+                return undefined;
+            }
+            var referenceEntries = [];
+            for (var _i = 0, referenceSymbols_1 = referenceSymbols; _i < referenceSymbols_1.length; _i++) {
+                var referenceSymbol = referenceSymbols_1[_i];
+                ts.addRange(referenceEntries, referenceSymbol.references);
+            }
+            return referenceEntries;
+        }
+        function findRenameLocations(fileName, position, findInStrings, findInComments) {
+            var referencedSymbols = findReferencedSymbols(fileName, position, findInStrings, findInComments);
+            return convertReferences(referencedSymbols);
+        }
+        function getReferencesAtPosition(fileName, position) {
+            var referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
+            return convertReferences(referencedSymbols);
+        }
+        function findReferences(fileName, position) {
+            var referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
+            // Only include referenced symbols that have a valid definition.
+            return ts.filter(referencedSymbols, function (rs) { return !!rs.definition; });
+        }
+        function findReferencedSymbols(fileName, position, findInStrings, findInComments) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            if (node.kind !== 69 /* Identifier */ &&
+                // TODO (drosen): This should be enabled in a later release - currently breaks rename.
+                // node.kind !== SyntaxKind.ThisKeyword &&
+                // node.kind !== SyntaxKind.SuperKeyword &&
+                node.kind !== 9 /* StringLiteral */ &&
+                !isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                return undefined;
+            }
+            ts.Debug.assert(node.kind === 69 /* Identifier */ || node.kind === 8 /* NumericLiteral */ || node.kind === 9 /* StringLiteral */);
+            return getReferencedSymbolsForNode(node, program.getSourceFiles(), findInStrings, findInComments);
+        }
+        function getReferencedSymbolsForNode(node, sourceFiles, findInStrings, findInComments) {
+            var typeChecker = program.getTypeChecker();
+            // Labels
+            if (isLabelName(node)) {
+                if (isJumpStatementTarget(node)) {
+                    var labelDefinition = getTargetLabel(node.parent, node.text);
+                    // if we have a label definition, look within its statement for references, if not, then
+                    // the label is undefined and we have no results..
+                    return labelDefinition ? getLabelReferencesInNode(labelDefinition.parent, labelDefinition) : undefined;
+                }
+                else {
+                    // it is a label definition and not a target, search within the parent labeledStatement
+                    return getLabelReferencesInNode(node.parent, node);
+                }
+            }
+            if (node.kind === 97 /* ThisKeyword */ || node.kind === 165 /* ThisType */) {
+                return getReferencesForThisKeyword(node, sourceFiles);
+            }
+            if (node.kind === 95 /* SuperKeyword */) {
+                return getReferencesForSuperKeyword(node);
+            }
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol && node.kind === 9 /* StringLiteral */) {
+                return getReferencesForStringLiteral(node, sourceFiles);
+            }
+            // Could not find a symbol e.g. unknown identifier
+            if (!symbol) {
+                // Can't have references to something that we have no symbol for.
+                return undefined;
+            }
+            var declarations = symbol.declarations;
+            // The symbol was an internal symbol and does not have a declaration e.g. undefined symbol
+            if (!declarations || !declarations.length) {
+                return undefined;
+            }
+            var result;
+            // Compute the meaning from the location and the symbol it references
+            var searchMeaning = getIntersectingMeaningFromDeclarations(getMeaningFromLocation(node), declarations);
+            // Get the text to search for.
+            // Note: if this is an external module symbol, the name doesn't include quotes.
+            var declaredName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
+            // Try to get the smallest valid scope that we can limit our search to;
+            // otherwise we'll need to search globally (i.e. include each file).
+            var scope = getSymbolScope(symbol);
+            // Maps from a symbol ID to the ReferencedSymbol entry in 'result'.
+            var symbolToIndex = [];
+            if (scope) {
+                result = [];
+                getReferencesInNode(scope, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
+            }
+            else {
+                var internedName = getInternedName(symbol, node, declarations);
+                for (var _i = 0, sourceFiles_4 = sourceFiles; _i < sourceFiles_4.length; _i++) {
+                    var sourceFile = sourceFiles_4[_i];
+                    cancellationToken.throwIfCancellationRequested();
+                    var nameTable = getNameTable(sourceFile);
+                    if (ts.lookUp(nameTable, internedName) !== undefined) {
+                        result = result || [];
+                        getReferencesInNode(sourceFile, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
+                    }
+                }
+            }
+            return result;
+            function getDefinition(symbol) {
+                var info = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, node.getSourceFile(), getContainerNode(node), node);
+                var name = ts.map(info.displayParts, function (p) { return p.text; }).join("");
+                var declarations = symbol.declarations;
+                if (!declarations || declarations.length === 0) {
+                    return undefined;
+                }
+                return {
+                    containerKind: "",
+                    containerName: "",
+                    name: name,
+                    kind: info.symbolKind,
+                    fileName: declarations[0].getSourceFile().fileName,
+                    textSpan: ts.createTextSpan(declarations[0].getStart(), 0)
+                };
+            }
+            function getAliasSymbolForPropertyNameSymbol(symbol, location) {
+                if (symbol.flags & 8388608 /* Alias */) {
+                    // Default import get alias
+                    var defaultImport = ts.getDeclarationOfKind(symbol, 231 /* ImportClause */);
+                    if (defaultImport) {
+                        return typeChecker.getAliasedSymbol(symbol);
+                    }
+                    var importOrExportSpecifier = ts.forEach(symbol.declarations, function (declaration) { return (declaration.kind === 234 /* ImportSpecifier */ ||
+                        declaration.kind === 238 /* ExportSpecifier */) ? declaration : undefined; });
+                    if (importOrExportSpecifier &&
+                        // export { a }
+                        (!importOrExportSpecifier.propertyName ||
+                            // export {a as class } where a is location
+                            importOrExportSpecifier.propertyName === location)) {
+                        // If Import specifier -> get alias
+                        // else Export specifier -> get local target
+                        return importOrExportSpecifier.kind === 234 /* ImportSpecifier */ ?
+                            typeChecker.getAliasedSymbol(symbol) :
+                            typeChecker.getExportSpecifierLocalTargetSymbol(importOrExportSpecifier);
+                    }
+                }
+                return undefined;
+            }
+            function getPropertySymbolOfDestructuringAssignment(location) {
+                return ts.isArrayLiteralOrObjectLiteralDestructuringPattern(location.parent.parent) &&
+                    typeChecker.getPropertySymbolOfDestructuringAssignment(location);
+            }
+            function isObjectBindingPatternElementWithoutPropertyName(symbol) {
+                var bindingElement = ts.getDeclarationOfKind(symbol, 169 /* BindingElement */);
+                return bindingElement &&
+                    bindingElement.parent.kind === 167 /* ObjectBindingPattern */ &&
+                    !bindingElement.propertyName;
+            }
+            function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol) {
+                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
+                    var bindingElement = ts.getDeclarationOfKind(symbol, 169 /* BindingElement */);
+                    var typeOfPattern = typeChecker.getTypeAtLocation(bindingElement.parent);
+                    return typeOfPattern && typeChecker.getPropertyOfType(typeOfPattern, bindingElement.name.text);
+                }
+                return undefined;
+            }
+            function getInternedName(symbol, location, declarations) {
+                // If this is an export or import specifier it could have been renamed using the 'as' syntax.
+                // If so we want to search for whatever under the cursor.
+                if (ts.isImportOrExportSpecifierName(location)) {
+                    return location.getText();
+                }
+                // Try to get the local symbol if we're dealing with an 'export default'
+                // since that symbol has the "true" name.
+                var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
+                symbol = localExportDefaultSymbol || symbol;
+                return ts.stripQuotes(symbol.name);
+            }
+            /**
+             * Determines the smallest scope in which a symbol may have named references.
+             * Note that not every construct has been accounted for. This function can
+             * probably be improved.
+             *
+             * @returns undefined if the scope cannot be determined, implying that
+             * a reference to a symbol can occur anywhere.
+             */
+            function getSymbolScope(symbol) {
+                // If this is the symbol of a named function expression or named class expression,
+                // then named references are limited to its own scope.
+                var valueDeclaration = symbol.valueDeclaration;
+                if (valueDeclaration && (valueDeclaration.kind === 179 /* FunctionExpression */ || valueDeclaration.kind === 192 /* ClassExpression */)) {
+                    return valueDeclaration;
+                }
+                // If this is private property or method, the scope is the containing class
+                if (symbol.flags & (4 /* Property */ | 8192 /* Method */)) {
+                    var privateDeclaration = ts.forEach(symbol.getDeclarations(), function (d) { return (d.flags & 8 /* Private */) ? d : undefined; });
+                    if (privateDeclaration) {
+                        return ts.getAncestor(privateDeclaration, 221 /* ClassDeclaration */);
+                    }
+                }
+                // If the symbol is an import we would like to find it if we are looking for what it imports.
+                // So consider it visible outside its declaration scope.
+                if (symbol.flags & 8388608 /* Alias */) {
+                    return undefined;
+                }
+                // If symbol is of object binding pattern element without property name we would want to
+                // look for property too and that could be anywhere
+                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
+                    return undefined;
+                }
+                // if this symbol is visible from its parent container, e.g. exported, then bail out
+                // if symbol correspond to the union property - bail out
+                if (symbol.parent || (symbol.flags & 268435456 /* SyntheticProperty */)) {
+                    return undefined;
+                }
+                var scope;
+                var declarations = symbol.getDeclarations();
+                if (declarations) {
+                    for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
+                        var declaration = declarations_9[_i];
+                        var container = getContainerNode(declaration);
+                        if (!container) {
+                            return undefined;
+                        }
+                        if (scope && scope !== container) {
+                            // Different declarations have different containers, bail out
+                            return undefined;
+                        }
+                        if (container.kind === 256 /* SourceFile */ && !ts.isExternalModule(container)) {
+                            // This is a global variable and not an external module, any declaration defined
+                            // within this scope is visible outside the file
+                            return undefined;
+                        }
+                        // The search scope is the container node
+                        scope = container;
+                    }
+                }
+                return scope;
+            }
+            function getPossibleSymbolReferencePositions(sourceFile, symbolName, start, end) {
+                var positions = [];
+                /// TODO: Cache symbol existence for files to save text search
+                // Also, need to make this work for unicode escapes.
+                // Be resilient in the face of a symbol with no name or zero length name
+                if (!symbolName || !symbolName.length) {
+                    return positions;
+                }
+                var text = sourceFile.text;
+                var sourceLength = text.length;
+                var symbolNameLength = symbolName.length;
+                var position = text.indexOf(symbolName, start);
+                while (position >= 0) {
+                    cancellationToken.throwIfCancellationRequested();
+                    // If we are past the end, stop looking
+                    if (position > end)
+                        break;
+                    // We found a match.  Make sure it's not part of a larger word (i.e. the char
+                    // before and after it have to be a non-identifier char).
+                    var endPosition = position + symbolNameLength;
+                    if ((position === 0 || !ts.isIdentifierPart(text.charCodeAt(position - 1), 2 /* Latest */)) &&
+                        (endPosition === sourceLength || !ts.isIdentifierPart(text.charCodeAt(endPosition), 2 /* Latest */))) {
+                        // Found a real match.  Keep searching.
+                        positions.push(position);
+                    }
+                    position = text.indexOf(symbolName, position + symbolNameLength + 1);
+                }
+                return positions;
+            }
+            function getLabelReferencesInNode(container, targetLabel) {
+                var references = [];
+                var sourceFile = container.getSourceFile();
+                var labelName = targetLabel.text;
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container.getStart(), container.getEnd());
+                ts.forEach(possiblePositions, function (position) {
+                    cancellationToken.throwIfCancellationRequested();
+                    var node = ts.getTouchingWord(sourceFile, position);
+                    if (!node || node.getWidth() !== labelName.length) {
+                        return;
+                    }
+                    // Only pick labels that are either the target label, or have a target that is the target label
+                    if (node === targetLabel ||
+                        (isJumpStatementTarget(node) && getTargetLabel(node, labelName) === targetLabel)) {
+                        references.push(getReferenceEntryFromNode(node));
+                    }
+                });
+                var definition = {
+                    containerKind: "",
+                    containerName: "",
+                    fileName: targetLabel.getSourceFile().fileName,
+                    kind: ScriptElementKind.label,
+                    name: labelName,
+                    textSpan: ts.createTextSpanFromBounds(targetLabel.getStart(), targetLabel.getEnd())
+                };
+                return [{ definition: definition, references: references }];
+            }
+            function isValidReferencePosition(node, searchSymbolName) {
+                if (node) {
+                    // Compare the length so we filter out strict superstrings of the symbol we are looking for
+                    switch (node.kind) {
+                        case 69 /* Identifier */:
+                            return node.getWidth() === searchSymbolName.length;
+                        case 9 /* StringLiteral */:
+                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
+                                isNameOfExternalModuleImportOrDeclaration(node)) {
+                                // For string literals we have two additional chars for the quotes
+                                return node.getWidth() === searchSymbolName.length + 2;
+                            }
+                            break;
+                        case 8 /* NumericLiteral */:
+                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                                return node.getWidth() === searchSymbolName.length;
+                            }
+                            break;
+                    }
+                }
+                return false;
+            }
+            /** Search within node "container" for references for a search value, where the search value is defined as a
+              * tuple of(searchSymbol, searchText, searchLocation, and searchMeaning).
+              * searchLocation: a node where the search value
+              */
+            function getReferencesInNode(container, searchSymbol, searchText, searchLocation, searchMeaning, findInStrings, findInComments, result, symbolToIndex) {
+                var sourceFile = container.getSourceFile();
+                var tripleSlashDirectivePrefixRegex = /^\/\/\/\s*</;
+                var start = findInComments ? container.getFullStart() : container.getStart();
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, start, container.getEnd());
+                if (possiblePositions.length) {
+                    // Build the set of symbols to search for, initially it has only the current symbol
+                    var searchSymbols_1 = populateSearchSymbolSet(searchSymbol, searchLocation);
+                    ts.forEach(possiblePositions, function (position) {
+                        cancellationToken.throwIfCancellationRequested();
+                        var referenceLocation = ts.getTouchingPropertyName(sourceFile, position);
+                        if (!isValidReferencePosition(referenceLocation, searchText)) {
+                            // This wasn't the start of a token.  Check to see if it might be a
+                            // match in a comment or string if that's what the caller is asking
+                            // for.
+                            if ((findInStrings && ts.isInString(sourceFile, position)) ||
+                                (findInComments && isInNonReferenceComment(sourceFile, position))) {
+                                // In the case where we're looking inside comments/strings, we don't have
+                                // an actual definition.  So just use 'undefined' here.  Features like
+                                // 'Rename' won't care (as they ignore the definitions), and features like
+                                // 'FindReferences' will just filter out these results.
+                                result.push({
+                                    definition: undefined,
+                                    references: [{
+                                            fileName: sourceFile.fileName,
+                                            textSpan: ts.createTextSpan(position, searchText.length),
+                                            isWriteAccess: false
+                                        }]
+                                });
+                            }
+                            return;
+                        }
+                        if (!(getMeaningFromLocation(referenceLocation) & searchMeaning)) {
+                            return;
+                        }
+                        var referenceSymbol = typeChecker.getSymbolAtLocation(referenceLocation);
+                        if (referenceSymbol) {
+                            var referenceSymbolDeclaration = referenceSymbol.valueDeclaration;
+                            var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(referenceSymbolDeclaration);
+                            var relatedSymbol = getRelatedSymbol(searchSymbols_1, referenceSymbol, referenceLocation);
+                            if (relatedSymbol) {
+                                var referencedSymbol = getReferencedSymbol(relatedSymbol);
+                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceLocation));
+                            }
+                            else if (!(referenceSymbol.flags & 67108864 /* Transient */) && searchSymbols_1.indexOf(shorthandValueSymbol) >= 0) {
+                                var referencedSymbol = getReferencedSymbol(shorthandValueSymbol);
+                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceSymbolDeclaration.name));
+                            }
+                        }
+                    });
+                }
+                return;
+                function getReferencedSymbol(symbol) {
+                    var symbolId = ts.getSymbolId(symbol);
+                    var index = symbolToIndex[symbolId];
+                    if (index === undefined) {
+                        index = result.length;
+                        symbolToIndex[symbolId] = index;
+                        result.push({
+                            definition: getDefinition(symbol),
+                            references: []
+                        });
+                    }
+                    return result[index];
+                }
+                function isInNonReferenceComment(sourceFile, position) {
+                    return ts.isInCommentHelper(sourceFile, position, isNonReferenceComment);
+                    function isNonReferenceComment(c) {
+                        var commentText = sourceFile.text.substring(c.pos, c.end);
+                        return !tripleSlashDirectivePrefixRegex.test(commentText);
+                    }
+                }
+            }
+            function getReferencesForSuperKeyword(superKeyword) {
+                var searchSpaceNode = ts.getSuperContainer(superKeyword, /*stopOnFunctions*/ false);
+                if (!searchSpaceNode) {
+                    return undefined;
+                }
+                // Whether 'super' occurs in a static context within a class.
+                var staticFlag = 32 /* Static */;
+                switch (searchSpaceNode.kind) {
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 148 /* Constructor */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        staticFlag &= searchSpaceNode.flags;
+                        searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
+                        break;
+                    default:
+                        return undefined;
+                }
+                var references = [];
+                var sourceFile = searchSpaceNode.getSourceFile();
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
+                ts.forEach(possiblePositions, function (position) {
+                    cancellationToken.throwIfCancellationRequested();
+                    var node = ts.getTouchingWord(sourceFile, position);
+                    if (!node || node.kind !== 95 /* SuperKeyword */) {
+                        return;
+                    }
+                    var container = ts.getSuperContainer(node, /*stopOnFunctions*/ false);
+                    // If we have a 'super' container, we must have an enclosing class.
+                    // Now make sure the owning class is the same as the search-space
+                    // and has the same static qualifier as the original 'super's owner.
+                    if (container && (32 /* Static */ & container.flags) === staticFlag && container.parent.symbol === searchSpaceNode.symbol) {
+                        references.push(getReferenceEntryFromNode(node));
+                    }
+                });
+                var definition = getDefinition(searchSpaceNode.symbol);
+                return [{ definition: definition, references: references }];
+            }
+            function getReferencesForThisKeyword(thisOrSuperKeyword, sourceFiles) {
+                var searchSpaceNode = ts.getThisContainer(thisOrSuperKeyword, /* includeArrowFunctions */ false);
+                // Whether 'this' occurs in a static context within a class.
+                var staticFlag = 32 /* Static */;
+                switch (searchSpaceNode.kind) {
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        if (ts.isObjectLiteralMethod(searchSpaceNode)) {
+                            break;
+                        }
+                    // fall through
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                    case 148 /* Constructor */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        staticFlag &= searchSpaceNode.flags;
+                        searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
+                        break;
+                    case 256 /* SourceFile */:
+                        if (ts.isExternalModule(searchSpaceNode)) {
+                            return undefined;
+                        }
+                    // Fall through
+                    case 220 /* FunctionDeclaration */:
+                    case 179 /* FunctionExpression */:
+                        break;
+                    // Computed properties in classes are not handled here because references to this are illegal,
+                    // so there is no point finding references to them.
+                    default:
+                        return undefined;
+                }
+                var references = [];
+                var possiblePositions;
+                if (searchSpaceNode.kind === 256 /* SourceFile */) {
+                    ts.forEach(sourceFiles, function (sourceFile) {
+                        possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", sourceFile.getStart(), sourceFile.getEnd());
+                        getThisReferencesInFile(sourceFile, sourceFile, possiblePositions, references);
+                    });
+                }
+                else {
+                    var sourceFile = searchSpaceNode.getSourceFile();
+                    possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
+                    getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, references);
+                }
+                return [{
+                        definition: {
+                            containerKind: "",
+                            containerName: "",
+                            fileName: node.getSourceFile().fileName,
+                            kind: ScriptElementKind.variableElement,
+                            name: "this",
+                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
+                        },
+                        references: references
+                    }];
+                function getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, result) {
+                    ts.forEach(possiblePositions, function (position) {
+                        cancellationToken.throwIfCancellationRequested();
+                        var node = ts.getTouchingWord(sourceFile, position);
+                        if (!node || (node.kind !== 97 /* ThisKeyword */ && node.kind !== 165 /* ThisType */)) {
+                            return;
+                        }
+                        var container = ts.getThisContainer(node, /* includeArrowFunctions */ false);
+                        switch (searchSpaceNode.kind) {
+                            case 179 /* FunctionExpression */:
+                            case 220 /* FunctionDeclaration */:
+                                if (searchSpaceNode.symbol === container.symbol) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                            case 147 /* MethodDeclaration */:
+                            case 146 /* MethodSignature */:
+                                if (ts.isObjectLiteralMethod(searchSpaceNode) && searchSpaceNode.symbol === container.symbol) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                            case 192 /* ClassExpression */:
+                            case 221 /* ClassDeclaration */:
+                                // Make sure the container belongs to the same class
+                                // and has the appropriate static modifier from the original container.
+                                if (container.parent && searchSpaceNode.symbol === container.parent.symbol && (container.flags & 32 /* Static */) === staticFlag) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                            case 256 /* SourceFile */:
+                                if (container.kind === 256 /* SourceFile */ && !ts.isExternalModule(container)) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                        }
+                    });
+                }
+            }
+            function getReferencesForStringLiteral(node, sourceFiles) {
+                var typeChecker = program.getTypeChecker();
+                var type = getStringLiteralTypeForNode(node, typeChecker);
+                if (!type) {
+                    // nothing to do here. moving on
+                    return undefined;
+                }
+                var references = [];
+                for (var _i = 0, sourceFiles_5 = sourceFiles; _i < sourceFiles_5.length; _i++) {
+                    var sourceFile = sourceFiles_5[_i];
+                    var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, type.text, sourceFile.getStart(), sourceFile.getEnd());
+                    getReferencesForStringLiteralInFile(sourceFile, type, possiblePositions, references);
+                }
+                return [{
+                        definition: {
+                            containerKind: "",
+                            containerName: "",
+                            fileName: node.getSourceFile().fileName,
+                            kind: ScriptElementKind.variableElement,
+                            name: type.text,
+                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
+                        },
+                        references: references
+                    }];
+                function getReferencesForStringLiteralInFile(sourceFile, searchType, possiblePositions, references) {
+                    for (var _i = 0, possiblePositions_1 = possiblePositions; _i < possiblePositions_1.length; _i++) {
+                        var position = possiblePositions_1[_i];
+                        cancellationToken.throwIfCancellationRequested();
+                        var node_2 = ts.getTouchingWord(sourceFile, position);
+                        if (!node_2 || node_2.kind !== 9 /* StringLiteral */) {
+                            return;
+                        }
+                        var type_1 = getStringLiteralTypeForNode(node_2, typeChecker);
+                        if (type_1 === searchType) {
+                            references.push(getReferenceEntryFromNode(node_2));
+                        }
+                    }
+                }
+            }
+            function populateSearchSymbolSet(symbol, location) {
+                // The search set contains at least the current symbol
+                var result = [symbol];
+                // If the location is name of property symbol from object literal destructuring pattern
+                // Search the property symbol
+                //      for ( { property: p2 } of elems) { }
+                var containingObjectLiteralElement = getContainingObjectLiteralElement(location);
+                if (containingObjectLiteralElement && containingObjectLiteralElement.kind !== 254 /* ShorthandPropertyAssignment */) {
+                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(location);
+                    if (propertySymbol) {
+                        result.push(propertySymbol);
+                    }
+                }
+                // If the symbol is an alias, add what it aliases to the list
+                //     import {a} from "mod";
+                //     export {a}
+                // If the symbol is an alias to default declaration, add what it aliases to the list
+                //     declare "mod" { export default class B { } }
+                //     import B from "mod";
+                //// For export specifiers, the exported name can be referring to a local symbol, e.g.:
+                ////     import {a} from "mod";
+                ////     export {a as somethingElse}
+                //// We want the *local* declaration of 'a' as declared in the import,
+                //// *not* as declared within "mod" (or farther)
+                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(symbol, location);
+                if (aliasSymbol) {
+                    result = result.concat(populateSearchSymbolSet(aliasSymbol, location));
+                }
+                // If the location is in a context sensitive location (i.e. in an object literal) try
+                // to get a contextual type for it, and add the property symbol from the contextual
+                // type to the search set
+                if (containingObjectLiteralElement) {
+                    ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
+                        ts.addRange(result, typeChecker.getRootSymbols(contextualSymbol));
+                    });
+                    /* Because in short-hand property assignment, location has two meaning : property name and as value of the property
+                     * When we do findAllReference at the position of the short-hand property assignment, we would want to have references to position of
+                     * property name and variable declaration of the identifier.
+                     * Like in below example, when querying for all references for an identifier 'name', of the property assignment, the language service
+                     * should show both 'name' in 'obj' and 'name' in variable declaration
+                     *      const name = "Foo";
+                     *      const obj = { name };
+                     * In order to do that, we will populate the search set with the value symbol of the identifier as a value of the property assignment
+                     * so that when matching with potential reference symbol, both symbols from property declaration and variable declaration
+                     * will be included correctly.
+                     */
+                    var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(location.parent);
+                    if (shorthandValueSymbol) {
+                        result.push(shorthandValueSymbol);
+                    }
+                }
+                // If the symbol.valueDeclaration is a property parameter declaration,
+                // we should include both parameter declaration symbol and property declaration symbol
+                // Parameter Declaration symbol is only visible within function scope, so the symbol is stored in constructor.locals.
+                // Property Declaration symbol is a member of the class, so the symbol is stored in its class Declaration.symbol.members
+                if (symbol.valueDeclaration && symbol.valueDeclaration.kind === 142 /* Parameter */ &&
+                    ts.isParameterPropertyDeclaration(symbol.valueDeclaration)) {
+                    result = result.concat(typeChecker.getSymbolsOfParameterPropertyDeclaration(symbol.valueDeclaration, symbol.name));
+                }
+                // If this is symbol of binding element without propertyName declaration in Object binding pattern
+                // Include the property in the search
+                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol);
+                if (bindingElementPropertySymbol) {
+                    result.push(bindingElementPropertySymbol);
+                }
+                // If this is a union property, add all the symbols from all its source symbols in all unioned types.
+                // If the symbol is an instantiation from a another symbol (e.g. widened symbol) , add the root the list
+                ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
+                    if (rootSymbol !== symbol) {
+                        result.push(rootSymbol);
+                    }
+                    // Add symbol of properties/methods of the same name in base classes and implemented interfaces definitions
+                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 /* Class */ | 64 /* Interface */)) {
+                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ {});
+                    }
+                });
+                return result;
+            }
+            /**
+             * Find symbol of the given property-name and add the symbol to the given result array
+             * @param symbol a symbol to start searching for the given propertyName
+             * @param propertyName a name of property to search for
+             * @param result an array of symbol of found property symbols
+             * @param previousIterationSymbolsCache a cache of symbol from previous iterations of calling this function to prevent infinite revisiting of the same symbol.
+             *                                The value of previousIterationSymbol is undefined when the function is first called.
+             */
+            function getPropertySymbolsFromBaseTypes(symbol, propertyName, result, previousIterationSymbolsCache) {
+                if (!symbol) {
+                    return;
+                }
+                // If the current symbol is the same as the previous-iteration symbol, we can just return the symbol that has already been visited
+                // This is particularly important for the following cases, so that we do not infinitely visit the same symbol.
+                // For example:
+                //      interface C extends C {
+                //          /*findRef*/propName: string;
+                //      }
+                // The first time getPropertySymbolsFromBaseTypes is called when finding-all-references at propName,
+                // the symbol argument will be the symbol of an interface "C" and previousIterationSymbol is undefined,
+                // the function will add any found symbol of the property-name, then its sub-routine will call
+                // getPropertySymbolsFromBaseTypes again to walk up any base types to prevent revisiting already
+                // visited symbol, interface "C", the sub-routine will pass the current symbol as previousIterationSymbol.
+                if (ts.hasProperty(previousIterationSymbolsCache, symbol.name)) {
+                    return;
+                }
+                if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                    ts.forEach(symbol.getDeclarations(), function (declaration) {
+                        if (ts.isClassLike(declaration)) {
+                            getPropertySymbolFromTypeReference(ts.getClassExtendsHeritageClauseElement(declaration));
+                            ts.forEach(ts.getClassImplementsHeritageClauseElements(declaration), getPropertySymbolFromTypeReference);
+                        }
+                        else if (declaration.kind === 222 /* InterfaceDeclaration */) {
+                            ts.forEach(ts.getInterfaceBaseTypeNodes(declaration), getPropertySymbolFromTypeReference);
+                        }
+                    });
+                }
+                return;
+                function getPropertySymbolFromTypeReference(typeReference) {
+                    if (typeReference) {
+                        var type = typeChecker.getTypeAtLocation(typeReference);
+                        if (type) {
+                            var propertySymbol = typeChecker.getPropertyOfType(type, propertyName);
+                            if (propertySymbol) {
+                                result.push.apply(result, typeChecker.getRootSymbols(propertySymbol));
+                            }
+                            // Visit the typeReference as well to see if it directly or indirectly use that property
+                            previousIterationSymbolsCache[symbol.name] = symbol;
+                            getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache);
+                        }
+                    }
+                }
+            }
+            function getRelatedSymbol(searchSymbols, referenceSymbol, referenceLocation) {
+                if (searchSymbols.indexOf(referenceSymbol) >= 0) {
+                    return referenceSymbol;
+                }
+                // If the reference symbol is an alias, check if what it is aliasing is one of the search
+                // symbols but by looking up for related symbol of this alias so it can handle multiple level of indirectness.
+                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(referenceSymbol, referenceLocation);
+                if (aliasSymbol) {
+                    return getRelatedSymbol(searchSymbols, aliasSymbol, referenceLocation);
+                }
+                // If the reference location is in an object literal, try to get the contextual type for the
+                // object literal, lookup the property symbol in the contextual type, and use this symbol to
+                // compare to our searchSymbol
+                var containingObjectLiteralElement = getContainingObjectLiteralElement(referenceLocation);
+                if (containingObjectLiteralElement) {
+                    var contextualSymbol = ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
+                        return ts.forEach(typeChecker.getRootSymbols(contextualSymbol), function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
+                    });
+                    if (contextualSymbol) {
+                        return contextualSymbol;
+                    }
+                    // If the reference location is the name of property from object literal destructuring pattern
+                    // Get the property symbol from the object literal's type and look if thats the search symbol
+                    // In below eg. get 'property' from type of elems iterating type
+                    //      for ( { property: p2 } of elems) { }
+                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation);
+                    if (propertySymbol && searchSymbols.indexOf(propertySymbol) >= 0) {
+                        return propertySymbol;
+                    }
+                }
+                // If the reference location is the binding element and doesn't have property name
+                // then include the binding element in the related symbols
+                //      let { a } : { a };
+                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol);
+                if (bindingElementPropertySymbol && searchSymbols.indexOf(bindingElementPropertySymbol) >= 0) {
+                    return bindingElementPropertySymbol;
+                }
+                // Unwrap symbols to get to the root (e.g. transient symbols as a result of widening)
+                // Or a union property, use its underlying unioned symbols
+                return ts.forEach(typeChecker.getRootSymbols(referenceSymbol), function (rootSymbol) {
+                    // if it is in the list, then we are done
+                    if (searchSymbols.indexOf(rootSymbol) >= 0) {
+                        return rootSymbol;
+                    }
+                    // Finally, try all properties with the same name in any type the containing type extended or implemented, and
+                    // see if any is in the list
+                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 /* Class */ | 64 /* Interface */)) {
+                        var result_4 = [];
+                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result_4, /*previousIterationSymbolsCache*/ {});
+                        return ts.forEach(result_4, function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
+                    }
+                    return undefined;
+                });
+            }
+            function getNameFromObjectLiteralElement(node) {
+                if (node.name.kind === 140 /* ComputedPropertyName */) {
+                    var nameExpression = node.name.expression;
+                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
+                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
+                        return nameExpression.text;
+                    }
+                    return undefined;
+                }
+                return node.name.text;
+            }
+            function getPropertySymbolsFromContextualType(node) {
+                var objectLiteral = node.parent;
+                var contextualType = typeChecker.getContextualType(objectLiteral);
+                var name = getNameFromObjectLiteralElement(node);
+                if (name && contextualType) {
+                    var result_5 = [];
+                    var symbol_1 = contextualType.getProperty(name);
+                    if (symbol_1) {
+                        result_5.push(symbol_1);
+                    }
+                    if (contextualType.flags & 16384 /* Union */) {
+                        ts.forEach(contextualType.types, function (t) {
+                            var symbol = t.getProperty(name);
+                            if (symbol) {
+                                result_5.push(symbol);
+                            }
+                        });
+                    }
+                    return result_5;
+                }
+                return undefined;
+            }
+            /** Given an initial searchMeaning, extracted from a location, widen the search scope based on the declarations
+              * of the corresponding symbol. e.g. if we are searching for "Foo" in value position, but "Foo" references a class
+              * then we need to widen the search to include type positions as well.
+              * On the contrary, if we are searching for "Bar" in type position and we trace bar to an interface, and an uninstantiated
+              * module, we want to keep the search limited to only types, as the two declarations (interface and uninstantiated module)
+              * do not intersect in any of the three spaces.
+              */
+            function getIntersectingMeaningFromDeclarations(meaning, declarations) {
+                if (declarations) {
+                    var lastIterationMeaning = void 0;
+                    do {
+                        // The result is order-sensitive, for instance if initialMeaning === Namespace, and declarations = [class, instantiated module]
+                        // we need to consider both as they initialMeaning intersects with the module in the namespace space, and the module
+                        // intersects with the class in the value space.
+                        // To achieve that we will keep iterating until the result stabilizes.
+                        // Remember the last meaning
+                        lastIterationMeaning = meaning;
+                        for (var _i = 0, declarations_10 = declarations; _i < declarations_10.length; _i++) {
+                            var declaration = declarations_10[_i];
+                            var declarationMeaning = getMeaningFromDeclaration(declaration);
+                            if (declarationMeaning & meaning) {
+                                meaning |= declarationMeaning;
+                            }
+                        }
+                    } while (meaning !== lastIterationMeaning);
+                }
+                return meaning;
+            }
+        }
+        function getReferenceEntryFromNode(node) {
+            var start = node.getStart();
+            var end = node.getEnd();
+            if (node.kind === 9 /* StringLiteral */) {
+                start += 1;
+                end -= 1;
+            }
+            return {
+                fileName: node.getSourceFile().fileName,
+                textSpan: ts.createTextSpanFromBounds(start, end),
+                isWriteAccess: isWriteAccess(node)
+            };
+        }
+        /** A node is considered a writeAccess iff it is a name of a declaration or a target of an assignment */
+        function isWriteAccess(node) {
+            if (node.kind === 69 /* Identifier */ && ts.isDeclarationName(node)) {
+                return true;
+            }
+            var parent = node.parent;
+            if (parent) {
+                if (parent.kind === 186 /* PostfixUnaryExpression */ || parent.kind === 185 /* PrefixUnaryExpression */) {
+                    return true;
+                }
+                else if (parent.kind === 187 /* BinaryExpression */ && parent.left === node) {
+                    var operator = parent.operatorToken.kind;
+                    return 56 /* FirstAssignment */ <= operator && operator <= 68 /* LastAssignment */;
+                }
+            }
+            return false;
+        }
+        /// NavigateTo
+        function getNavigateToItems(searchValue, maxResultCount) {
+            synchronizeHostData();
+            var checker = getProgram().getTypeChecker();
+            return ts.NavigateTo.getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount);
+        }
+        function getEmitOutput(fileName) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var outputFiles = [];
+            function writeFile(fileName, data, writeByteOrderMark) {
+                outputFiles.push({
+                    name: fileName,
+                    writeByteOrderMark: writeByteOrderMark,
+                    text: data
+                });
+            }
+            var emitOutput = program.emit(sourceFile, writeFile, cancellationToken);
+            return {
+                outputFiles: outputFiles,
+                emitSkipped: emitOutput.emitSkipped
+            };
+        }
+        function getMeaningFromDeclaration(node) {
+            switch (node.kind) {
+                case 142 /* Parameter */:
+                case 218 /* VariableDeclaration */:
+                case 169 /* BindingElement */:
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 253 /* PropertyAssignment */:
+                case 254 /* ShorthandPropertyAssignment */:
+                case 255 /* EnumMember */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 148 /* Constructor */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                case 252 /* CatchClause */:
+                    return 1 /* Value */;
+                case 141 /* TypeParameter */:
+                case 222 /* InterfaceDeclaration */:
+                case 223 /* TypeAliasDeclaration */:
+                case 159 /* TypeLiteral */:
+                    return 2 /* Type */;
+                case 221 /* ClassDeclaration */:
+                case 224 /* EnumDeclaration */:
+                    return 1 /* Value */ | 2 /* Type */;
+                case 225 /* ModuleDeclaration */:
+                    if (ts.isAmbientModule(node)) {
+                        return 4 /* Namespace */ | 1 /* Value */;
+                    }
+                    else if (ts.getModuleInstanceState(node) === 1 /* Instantiated */) {
+                        return 4 /* Namespace */ | 1 /* Value */;
+                    }
+                    else {
+                        return 4 /* Namespace */;
+                    }
+                case 233 /* NamedImports */:
+                case 234 /* ImportSpecifier */:
+                case 229 /* ImportEqualsDeclaration */:
+                case 230 /* ImportDeclaration */:
+                case 235 /* ExportAssignment */:
+                case 236 /* ExportDeclaration */:
+                    return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+                // An external module can be a Value
+                case 256 /* SourceFile */:
+                    return 4 /* Namespace */ | 1 /* Value */;
+            }
+            return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+        }
+        function isTypeReference(node) {
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(node)) {
+                node = node.parent;
+            }
+            return node.parent.kind === 155 /* TypeReference */ ||
+                (node.parent.kind === 194 /* ExpressionWithTypeArguments */ && !ts.isExpressionWithTypeArgumentsInClassExtendsClause(node.parent)) ||
+                (node.kind === 97 /* ThisKeyword */ && !ts.isExpression(node)) ||
+                node.kind === 165 /* ThisType */;
+        }
+        function isNamespaceReference(node) {
+            return isQualifiedNameNamespaceReference(node) || isPropertyAccessNamespaceReference(node);
+        }
+        function isPropertyAccessNamespaceReference(node) {
+            var root = node;
+            var isLastClause = true;
+            if (root.parent.kind === 172 /* PropertyAccessExpression */) {
+                while (root.parent && root.parent.kind === 172 /* PropertyAccessExpression */) {
+                    root = root.parent;
+                }
+                isLastClause = root.name === node;
+            }
+            if (!isLastClause && root.parent.kind === 194 /* ExpressionWithTypeArguments */ && root.parent.parent.kind === 251 /* HeritageClause */) {
+                var decl = root.parent.parent.parent;
+                return (decl.kind === 221 /* ClassDeclaration */ && root.parent.parent.token === 106 /* ImplementsKeyword */) ||
+                    (decl.kind === 222 /* InterfaceDeclaration */ && root.parent.parent.token === 83 /* ExtendsKeyword */);
+            }
+            return false;
+        }
+        function isQualifiedNameNamespaceReference(node) {
+            var root = node;
+            var isLastClause = true;
+            if (root.parent.kind === 139 /* QualifiedName */) {
+                while (root.parent && root.parent.kind === 139 /* QualifiedName */) {
+                    root = root.parent;
+                }
+                isLastClause = root.right === node;
+            }
+            return root.parent.kind === 155 /* TypeReference */ && !isLastClause;
+        }
+        function isInRightSideOfImport(node) {
+            while (node.parent.kind === 139 /* QualifiedName */) {
+                node = node.parent;
+            }
+            return ts.isInternalModuleImportEqualsDeclaration(node.parent) && node.parent.moduleReference === node;
+        }
+        function getMeaningFromRightHandSideOfImportEquals(node) {
+            ts.Debug.assert(node.kind === 69 /* Identifier */);
+            //     import a = |b|; // Namespace
+            //     import a = |b.c|; // Value, type, namespace
+            //     import a = |b.c|.d; // Namespace
+            if (node.parent.kind === 139 /* QualifiedName */ &&
+                node.parent.right === node &&
+                node.parent.parent.kind === 229 /* ImportEqualsDeclaration */) {
+                return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+            }
+            return 4 /* Namespace */;
+        }
+        function getMeaningFromLocation(node) {
+            if (node.parent.kind === 235 /* ExportAssignment */) {
+                return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+            }
+            else if (isInRightSideOfImport(node)) {
+                return getMeaningFromRightHandSideOfImportEquals(node);
+            }
+            else if (ts.isDeclarationName(node)) {
+                return getMeaningFromDeclaration(node.parent);
+            }
+            else if (isTypeReference(node)) {
+                return 2 /* Type */;
+            }
+            else if (isNamespaceReference(node)) {
+                return 4 /* Namespace */;
+            }
+            else {
+                return 1 /* Value */;
+            }
+        }
+        // Signature help
+        /**
+         * This is a semantic operation.
+         */
+        function getSignatureHelpItems(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            return ts.SignatureHelp.getSignatureHelpItems(program, sourceFile, position, cancellationToken);
+        }
+        /// Syntactic features
+        function getNonBoundSourceFile(fileName) {
+            return syntaxTreeCache.getCurrentSourceFile(fileName);
+        }
+        function getNameOrDottedNameSpan(fileName, startPos, endPos) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            // Get node at the location
+            var node = ts.getTouchingPropertyName(sourceFile, startPos);
+            if (node === sourceFile) {
+                return;
+            }
+            switch (node.kind) {
+                case 172 /* PropertyAccessExpression */:
+                case 139 /* QualifiedName */:
+                case 9 /* StringLiteral */:
+                case 166 /* StringLiteralType */:
+                case 84 /* FalseKeyword */:
+                case 99 /* TrueKeyword */:
+                case 93 /* NullKeyword */:
+                case 95 /* SuperKeyword */:
+                case 97 /* ThisKeyword */:
+                case 165 /* ThisType */:
+                case 69 /* Identifier */:
+                    break;
+                // Cant create the text span
+                default:
+                    return;
+            }
+            var nodeForStartPos = node;
+            while (true) {
+                if (isRightSideOfPropertyAccess(nodeForStartPos) || isRightSideOfQualifiedName(nodeForStartPos)) {
+                    // If on the span is in right side of the the property or qualified name, return the span from the qualified name pos to end of this node
+                    nodeForStartPos = nodeForStartPos.parent;
+                }
+                else if (isNameOfModuleDeclaration(nodeForStartPos)) {
+                    // If this is name of a module declarations, check if this is right side of dotted module name
+                    // If parent of the module declaration which is parent of this node is module declaration and its body is the module declaration that this node is name of
+                    // Then this name is name from dotted module
+                    if (nodeForStartPos.parent.parent.kind === 225 /* ModuleDeclaration */ &&
+                        nodeForStartPos.parent.parent.body === nodeForStartPos.parent) {
+                        // Use parent module declarations name for start pos
+                        nodeForStartPos = nodeForStartPos.parent.parent.name;
+                    }
+                    else {
+                        // We have to use this name for start pos
+                        break;
+                    }
+                }
+                else {
+                    // Is not a member expression so we have found the node for start pos
+                    break;
+                }
+            }
+            return ts.createTextSpanFromBounds(nodeForStartPos.getStart(), node.getEnd());
+        }
+        function getBreakpointStatementAtPosition(fileName, position) {
+            // doesn't use compiler - no need to synchronize with host
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.BreakpointResolver.spanInSourceFileAtLocation(sourceFile, position);
+        }
+        function getNavigationBarItems(fileName) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.NavigationBar.getNavigationBarItems(sourceFile, host.getCompilationSettings());
+        }
+        function getSemanticClassifications(fileName, span) {
+            return convertClassifications(getEncodedSemanticClassifications(fileName, span));
+        }
+        function checkForClassificationCancellation(kind) {
+            // We don't want to actually call back into our host on every node to find out if we've
+            // been canceled.  That would be an enormous amount of chattyness, along with the all
+            // the overhead of marshalling the data to/from the host.  So instead we pick a few
+            // reasonable node kinds to bother checking on.  These node kinds represent high level
+            // constructs that we would expect to see commonly, but just at a far less frequent
+            // interval.
+            //
+            // For example, in checker.ts (around 750k) we only have around 600 of these constructs.
+            // That means we're calling back into the host around every 1.2k of the file we process.
+            // Lib.d.ts has similar numbers.
+            switch (kind) {
+                case 225 /* ModuleDeclaration */:
+                case 221 /* ClassDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 220 /* FunctionDeclaration */:
+                    cancellationToken.throwIfCancellationRequested();
+            }
+        }
+        function getEncodedSemanticClassifications(fileName, span) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var typeChecker = program.getTypeChecker();
+            var result = [];
+            var classifiableNames = program.getClassifiableNames();
+            processNode(sourceFile);
+            return { spans: result, endOfLineState: 0 /* None */ };
+            function pushClassification(start, length, type) {
+                result.push(start);
+                result.push(length);
+                result.push(type);
+            }
+            function classifySymbol(symbol, meaningAtPosition) {
+                var flags = symbol.getFlags();
+                if ((flags & 788448 /* Classifiable */) === 0 /* None */) {
+                    return;
+                }
+                if (flags & 32 /* Class */) {
+                    return 11 /* className */;
+                }
+                else if (flags & 384 /* Enum */) {
+                    return 12 /* enumName */;
+                }
+                else if (flags & 524288 /* TypeAlias */) {
+                    return 16 /* typeAliasName */;
+                }
+                else if (meaningAtPosition & 2 /* Type */) {
+                    if (flags & 64 /* Interface */) {
+                        return 13 /* interfaceName */;
+                    }
+                    else if (flags & 262144 /* TypeParameter */) {
+                        return 15 /* typeParameterName */;
+                    }
+                }
+                else if (flags & 1536 /* Module */) {
+                    // Only classify a module as such if
+                    //  - It appears in a namespace context.
+                    //  - There exists a module declaration which actually impacts the value side.
+                    if (meaningAtPosition & 4 /* Namespace */ ||
+                        (meaningAtPosition & 1 /* Value */ && hasValueSideModule(symbol))) {
+                        return 14 /* moduleName */;
+                    }
+                }
+                return undefined;
+                /**
+                 * Returns true if there exists a module that introduces entities on the value side.
+                 */
+                function hasValueSideModule(symbol) {
+                    return ts.forEach(symbol.declarations, function (declaration) {
+                        return declaration.kind === 225 /* ModuleDeclaration */ &&
+                            ts.getModuleInstanceState(declaration) === 1 /* Instantiated */;
+                    });
+                }
+            }
+            function processNode(node) {
+                // Only walk into nodes that intersect the requested span.
+                if (node && ts.textSpanIntersectsWith(span, node.getFullStart(), node.getFullWidth())) {
+                    var kind = node.kind;
+                    checkForClassificationCancellation(kind);
+                    if (kind === 69 /* Identifier */ && !ts.nodeIsMissing(node)) {
+                        var identifier = node;
+                        // Only bother calling into the typechecker if this is an identifier that
+                        // could possibly resolve to a type name.  This makes classification run
+                        // in a third of the time it would normally take.
+                        if (classifiableNames[identifier.text]) {
+                            var symbol = typeChecker.getSymbolAtLocation(node);
+                            if (symbol) {
+                                var type = classifySymbol(symbol, getMeaningFromLocation(node));
+                                if (type) {
+                                    pushClassification(node.getStart(), node.getWidth(), type);
+                                }
+                            }
+                        }
+                    }
+                    ts.forEachChild(node, processNode);
+                }
+            }
+        }
+        function getClassificationTypeName(type) {
+            switch (type) {
+                case 1 /* comment */: return ClassificationTypeNames.comment;
+                case 2 /* identifier */: return ClassificationTypeNames.identifier;
+                case 3 /* keyword */: return ClassificationTypeNames.keyword;
+                case 4 /* numericLiteral */: return ClassificationTypeNames.numericLiteral;
+                case 5 /* operator */: return ClassificationTypeNames.operator;
+                case 6 /* stringLiteral */: return ClassificationTypeNames.stringLiteral;
+                case 8 /* whiteSpace */: return ClassificationTypeNames.whiteSpace;
+                case 9 /* text */: return ClassificationTypeNames.text;
+                case 10 /* punctuation */: return ClassificationTypeNames.punctuation;
+                case 11 /* className */: return ClassificationTypeNames.className;
+                case 12 /* enumName */: return ClassificationTypeNames.enumName;
+                case 13 /* interfaceName */: return ClassificationTypeNames.interfaceName;
+                case 14 /* moduleName */: return ClassificationTypeNames.moduleName;
+                case 15 /* typeParameterName */: return ClassificationTypeNames.typeParameterName;
+                case 16 /* typeAliasName */: return ClassificationTypeNames.typeAliasName;
+                case 17 /* parameterName */: return ClassificationTypeNames.parameterName;
+                case 18 /* docCommentTagName */: return ClassificationTypeNames.docCommentTagName;
+                case 19 /* jsxOpenTagName */: return ClassificationTypeNames.jsxOpenTagName;
+                case 20 /* jsxCloseTagName */: return ClassificationTypeNames.jsxCloseTagName;
+                case 21 /* jsxSelfClosingTagName */: return ClassificationTypeNames.jsxSelfClosingTagName;
+                case 22 /* jsxAttribute */: return ClassificationTypeNames.jsxAttribute;
+                case 23 /* jsxText */: return ClassificationTypeNames.jsxText;
+                case 24 /* jsxAttributeStringLiteralValue */: return ClassificationTypeNames.jsxAttributeStringLiteralValue;
+            }
+        }
+        function convertClassifications(classifications) {
+            ts.Debug.assert(classifications.spans.length % 3 === 0);
+            var dense = classifications.spans;
+            var result = [];
+            for (var i = 0, n = dense.length; i < n; i += 3) {
+                result.push({
+                    textSpan: ts.createTextSpan(dense[i], dense[i + 1]),
+                    classificationType: getClassificationTypeName(dense[i + 2])
+                });
+            }
+            return result;
+        }
+        function getSyntacticClassifications(fileName, span) {
+            return convertClassifications(getEncodedSyntacticClassifications(fileName, span));
+        }
+        function getEncodedSyntacticClassifications(fileName, span) {
+            // doesn't use compiler - no need to synchronize with host
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            var spanStart = span.start;
+            var spanLength = span.length;
+            // Make a scanner we can get trivia from.
+            var triviaScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
+            var mergeConflictScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
+            var result = [];
+            processElement(sourceFile);
+            return { spans: result, endOfLineState: 0 /* None */ };
+            function pushClassification(start, length, type) {
+                result.push(start);
+                result.push(length);
+                result.push(type);
+            }
+            function classifyLeadingTriviaAndGetTokenStart(token) {
+                triviaScanner.setTextPos(token.pos);
+                while (true) {
+                    var start = triviaScanner.getTextPos();
+                    // only bother scanning if we have something that could be trivia.
+                    if (!ts.couldStartTrivia(sourceFile.text, start)) {
+                        return start;
+                    }
+                    var kind = triviaScanner.scan();
+                    var end = triviaScanner.getTextPos();
+                    var width = end - start;
+                    // The moment we get something that isn't trivia, then stop processing.
+                    if (!ts.isTrivia(kind)) {
+                        return start;
+                    }
+                    // Don't bother with newlines/whitespace.
+                    if (kind === 4 /* NewLineTrivia */ || kind === 5 /* WhitespaceTrivia */) {
+                        continue;
+                    }
+                    // Only bother with the trivia if it at least intersects the span of interest.
+                    if (ts.isComment(kind)) {
+                        classifyComment(token, kind, start, width);
+                        // Classifying a comment might cause us to reuse the trivia scanner
+                        // (because of jsdoc comments).  So after we classify the comment make
+                        // sure we set the scanner position back to where it needs to be.
+                        triviaScanner.setTextPos(end);
+                        continue;
+                    }
+                    if (kind === 7 /* ConflictMarkerTrivia */) {
+                        var text = sourceFile.text;
+                        var ch = text.charCodeAt(start);
+                        // for the <<<<<<< and >>>>>>> markers, we just add them in as comments
+                        // in the classification stream.
+                        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
+                            pushClassification(start, width, 1 /* comment */);
+                            continue;
+                        }
+                        // for the ======== add a comment for the first line, and then lex all
+                        // subsequent lines up until the end of the conflict marker.
+                        ts.Debug.assert(ch === 61 /* equals */);
+                        classifyDisabledMergeCode(text, start, end);
+                    }
+                }
+            }
+            function classifyComment(token, kind, start, width) {
+                if (kind === 3 /* MultiLineCommentTrivia */) {
+                    // See if this is a doc comment.  If so, we'll classify certain portions of it
+                    // specially.
+                    var docCommentAndDiagnostics = ts.parseIsolatedJSDocComment(sourceFile.text, start, width);
+                    if (docCommentAndDiagnostics && docCommentAndDiagnostics.jsDocComment) {
+                        docCommentAndDiagnostics.jsDocComment.parent = token;
+                        classifyJSDocComment(docCommentAndDiagnostics.jsDocComment);
+                        return;
+                    }
+                }
+                // Simple comment.  Just add as is.
+                pushCommentRange(start, width);
+            }
+            function pushCommentRange(start, width) {
+                pushClassification(start, width, 1 /* comment */);
+            }
+            function classifyJSDocComment(docComment) {
+                var pos = docComment.pos;
+                for (var _i = 0, _a = docComment.tags; _i < _a.length; _i++) {
+                    var tag = _a[_i];
+                    // As we walk through each tag, classify the portion of text from the end of
+                    // the last tag (or the start of the entire doc comment) as 'comment'.
+                    if (tag.pos !== pos) {
+                        pushCommentRange(pos, tag.pos - pos);
+                    }
+                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, 10 /* punctuation */);
+                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, 18 /* docCommentTagName */);
+                    pos = tag.tagName.end;
+                    switch (tag.kind) {
+                        case 275 /* JSDocParameterTag */:
+                            processJSDocParameterTag(tag);
+                            break;
+                        case 278 /* JSDocTemplateTag */:
+                            processJSDocTemplateTag(tag);
+                            break;
+                        case 277 /* JSDocTypeTag */:
+                            processElement(tag.typeExpression);
+                            break;
+                        case 276 /* JSDocReturnTag */:
+                            processElement(tag.typeExpression);
+                            break;
+                    }
+                    pos = tag.end;
+                }
+                if (pos !== docComment.end) {
+                    pushCommentRange(pos, docComment.end - pos);
+                }
+                return;
+                function processJSDocParameterTag(tag) {
+                    if (tag.preParameterName) {
+                        pushCommentRange(pos, tag.preParameterName.pos - pos);
+                        pushClassification(tag.preParameterName.pos, tag.preParameterName.end - tag.preParameterName.pos, 17 /* parameterName */);
+                        pos = tag.preParameterName.end;
+                    }
+                    if (tag.typeExpression) {
+                        pushCommentRange(pos, tag.typeExpression.pos - pos);
+                        processElement(tag.typeExpression);
+                        pos = tag.typeExpression.end;
+                    }
+                    if (tag.postParameterName) {
+                        pushCommentRange(pos, tag.postParameterName.pos - pos);
+                        pushClassification(tag.postParameterName.pos, tag.postParameterName.end - tag.postParameterName.pos, 17 /* parameterName */);
+                        pos = tag.postParameterName.end;
+                    }
+                }
+            }
+            function processJSDocTemplateTag(tag) {
+                for (var _i = 0, _a = tag.getChildren(); _i < _a.length; _i++) {
+                    var child = _a[_i];
+                    processElement(child);
+                }
+            }
+            function classifyDisabledMergeCode(text, start, end) {
+                // Classify the line that the ======= marker is on as a comment.  Then just lex
+                // all further tokens and add them to the result.
+                var i;
+                for (i = start; i < end; i++) {
+                    if (ts.isLineBreak(text.charCodeAt(i))) {
+                        break;
+                    }
+                }
+                pushClassification(start, i - start, 1 /* comment */);
+                mergeConflictScanner.setTextPos(i);
+                while (mergeConflictScanner.getTextPos() < end) {
+                    classifyDisabledCodeToken();
+                }
+            }
+            function classifyDisabledCodeToken() {
+                var start = mergeConflictScanner.getTextPos();
+                var tokenKind = mergeConflictScanner.scan();
+                var end = mergeConflictScanner.getTextPos();
+                var type = classifyTokenType(tokenKind);
+                if (type) {
+                    pushClassification(start, end - start, type);
+                }
+            }
+            /**
+             * Returns true if node should be treated as classified and no further processing is required.
+             * False will mean that node is not classified and traverse routine should recurse into node contents.
+             */
+            function tryClassifyNode(node) {
+                if (ts.nodeIsMissing(node)) {
+                    return true;
+                }
+                var classifiedElementName = tryClassifyJsxElementName(node);
+                if (!ts.isToken(node) && node.kind !== 244 /* JsxText */ && classifiedElementName === undefined) {
+                    return false;
+                }
+                var tokenStart = node.kind === 244 /* JsxText */ ? node.pos : classifyLeadingTriviaAndGetTokenStart(node);
+                var tokenWidth = node.end - tokenStart;
+                ts.Debug.assert(tokenWidth >= 0);
+                if (tokenWidth > 0) {
+                    var type = classifiedElementName || classifyTokenType(node.kind, node);
+                    if (type) {
+                        pushClassification(tokenStart, tokenWidth, type);
+                    }
+                }
+                return true;
+            }
+            function tryClassifyJsxElementName(token) {
+                switch (token.parent && token.parent.kind) {
+                    case 243 /* JsxOpeningElement */:
+                        if (token.parent.tagName === token) {
+                            return 19 /* jsxOpenTagName */;
+                        }
+                        break;
+                    case 245 /* JsxClosingElement */:
+                        if (token.parent.tagName === token) {
+                            return 20 /* jsxCloseTagName */;
+                        }
+                        break;
+                    case 242 /* JsxSelfClosingElement */:
+                        if (token.parent.tagName === token) {
+                            return 21 /* jsxSelfClosingTagName */;
+                        }
+                        break;
+                    case 246 /* JsxAttribute */:
+                        if (token.parent.name === token) {
+                            return 22 /* jsxAttribute */;
+                        }
+                        break;
+                }
+                return undefined;
+            }
+            // for accurate classification, the actual token should be passed in.  however, for
+            // cases like 'disabled merge code' classification, we just get the token kind and
+            // classify based on that instead.
+            function classifyTokenType(tokenKind, token) {
+                if (ts.isKeyword(tokenKind)) {
+                    return 3 /* keyword */;
+                }
+                // Special case < and >  If they appear in a generic context they are punctuation,
+                // not operators.
+                if (tokenKind === 25 /* LessThanToken */ || tokenKind === 27 /* GreaterThanToken */) {
+                    // If the node owning the token has a type argument list or type parameter list, then
+                    // we can effectively assume that a '<' and '>' belong to those lists.
+                    if (token && ts.getTypeArgumentOrTypeParameterList(token.parent)) {
+                        return 10 /* punctuation */;
+                    }
+                }
+                if (ts.isPunctuation(tokenKind)) {
+                    if (token) {
+                        if (tokenKind === 56 /* EqualsToken */) {
+                            // the '=' in a variable declaration is special cased here.
+                            if (token.parent.kind === 218 /* VariableDeclaration */ ||
+                                token.parent.kind === 145 /* PropertyDeclaration */ ||
+                                token.parent.kind === 142 /* Parameter */ ||
+                                token.parent.kind === 246 /* JsxAttribute */) {
+                                return 5 /* operator */;
+                            }
+                        }
+                        if (token.parent.kind === 187 /* BinaryExpression */ ||
+                            token.parent.kind === 185 /* PrefixUnaryExpression */ ||
+                            token.parent.kind === 186 /* PostfixUnaryExpression */ ||
+                            token.parent.kind === 188 /* ConditionalExpression */) {
+                            return 5 /* operator */;
+                        }
+                    }
+                    return 10 /* punctuation */;
+                }
+                else if (tokenKind === 8 /* NumericLiteral */) {
+                    return 4 /* numericLiteral */;
+                }
+                else if (tokenKind === 9 /* StringLiteral */ || tokenKind === 166 /* StringLiteralType */) {
+                    return token.parent.kind === 246 /* JsxAttribute */ ? 24 /* jsxAttributeStringLiteralValue */ : 6 /* stringLiteral */;
+                }
+                else if (tokenKind === 10 /* RegularExpressionLiteral */) {
+                    // TODO: we should get another classification type for these literals.
+                    return 6 /* stringLiteral */;
+                }
+                else if (ts.isTemplateLiteralKind(tokenKind)) {
+                    // TODO (drosen): we should *also* get another classification type for these literals.
+                    return 6 /* stringLiteral */;
+                }
+                else if (tokenKind === 244 /* JsxText */) {
+                    return 23 /* jsxText */;
+                }
+                else if (tokenKind === 69 /* Identifier */) {
+                    if (token) {
+                        switch (token.parent.kind) {
+                            case 221 /* ClassDeclaration */:
+                                if (token.parent.name === token) {
+                                    return 11 /* className */;
+                                }
+                                return;
+                            case 141 /* TypeParameter */:
+                                if (token.parent.name === token) {
+                                    return 15 /* typeParameterName */;
+                                }
+                                return;
+                            case 222 /* InterfaceDeclaration */:
+                                if (token.parent.name === token) {
+                                    return 13 /* interfaceName */;
+                                }
+                                return;
+                            case 224 /* EnumDeclaration */:
+                                if (token.parent.name === token) {
+                                    return 12 /* enumName */;
+                                }
+                                return;
+                            case 225 /* ModuleDeclaration */:
+                                if (token.parent.name === token) {
+                                    return 14 /* moduleName */;
+                                }
+                                return;
+                            case 142 /* Parameter */:
+                                if (token.parent.name === token) {
+                                    return 17 /* parameterName */;
+                                }
+                                return;
+                        }
+                    }
+                    return 2 /* identifier */;
+                }
+            }
+            function processElement(element) {
+                if (!element) {
+                    return;
+                }
+                // Ignore nodes that don't intersect the original span to classify.
+                if (ts.decodedTextSpanIntersectsWith(spanStart, spanLength, element.pos, element.getFullWidth())) {
+                    checkForClassificationCancellation(element.kind);
+                    var children = element.getChildren(sourceFile);
+                    for (var i = 0, n = children.length; i < n; i++) {
+                        var child = children[i];
+                        if (!tryClassifyNode(child)) {
+                            // Recurse into our child nodes.
+                            processElement(child);
+                        }
+                    }
+                }
+            }
+        }
+        function getOutliningSpans(fileName) {
+            // doesn't use compiler - no need to synchronize with host
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.OutliningElementsCollector.collectElements(sourceFile);
+        }
+        function getBraceMatchingAtPosition(fileName, position) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            var result = [];
+            var token = ts.getTouchingToken(sourceFile, position);
+            if (token.getStart(sourceFile) === position) {
+                var matchKind = getMatchingTokenKind(token);
+                // Ensure that there is a corresponding token to match ours.
+                if (matchKind) {
+                    var parentElement = token.parent;
+                    var childNodes = parentElement.getChildren(sourceFile);
+                    for (var _i = 0, childNodes_1 = childNodes; _i < childNodes_1.length; _i++) {
+                        var current = childNodes_1[_i];
+                        if (current.kind === matchKind) {
+                            var range1 = ts.createTextSpan(token.getStart(sourceFile), token.getWidth(sourceFile));
+                            var range2 = ts.createTextSpan(current.getStart(sourceFile), current.getWidth(sourceFile));
+                            // We want to order the braces when we return the result.
+                            if (range1.start < range2.start) {
+                                result.push(range1, range2);
+                            }
+                            else {
+                                result.push(range2, range1);
+                            }
+                            break;
+                        }
+                    }
+                }
+            }
+            return result;
+            function getMatchingTokenKind(token) {
+                switch (token.kind) {
+                    case 15 /* OpenBraceToken */: return 16 /* CloseBraceToken */;
+                    case 17 /* OpenParenToken */: return 18 /* CloseParenToken */;
+                    case 19 /* OpenBracketToken */: return 20 /* CloseBracketToken */;
+                    case 25 /* LessThanToken */: return 27 /* GreaterThanToken */;
+                    case 16 /* CloseBraceToken */: return 15 /* OpenBraceToken */;
+                    case 18 /* CloseParenToken */: return 17 /* OpenParenToken */;
+                    case 20 /* CloseBracketToken */: return 19 /* OpenBracketToken */;
+                    case 27 /* GreaterThanToken */: return 25 /* LessThanToken */;
+                }
+                return undefined;
+            }
+        }
+        function getIndentationAtPosition(fileName, position, editorOptions) {
+            var start = new Date().getTime();
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            log("getIndentationAtPosition: getCurrentSourceFile: " + (new Date().getTime() - start));
+            start = new Date().getTime();
+            var result = ts.formatting.SmartIndenter.getIndentation(position, sourceFile, editorOptions);
+            log("getIndentationAtPosition: computeIndentation  : " + (new Date().getTime() - start));
+            return result;
+        }
+        function getFormattingEditsForRange(fileName, start, end, options) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.formatting.formatSelection(start, end, sourceFile, getRuleProvider(options), options);
+        }
+        function getFormattingEditsForDocument(fileName, options) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.formatting.formatDocument(sourceFile, getRuleProvider(options), options);
+        }
+        function getFormattingEditsAfterKeystroke(fileName, position, key, options) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            if (key === "}") {
+                return ts.formatting.formatOnClosingCurly(position, sourceFile, getRuleProvider(options), options);
+            }
+            else if (key === ";") {
+                return ts.formatting.formatOnSemicolon(position, sourceFile, getRuleProvider(options), options);
+            }
+            else if (key === "\n") {
+                return ts.formatting.formatOnEnter(position, sourceFile, getRuleProvider(options), options);
+            }
+            return [];
+        }
+        /**
+         * Checks if position points to a valid position to add JSDoc comments, and if so,
+         * returns the appropriate template. Otherwise returns an empty string.
+         * Valid positions are
+         *      - outside of comments, statements, and expressions, and
+         *      - preceding a:
+         *          - function/constructor/method declaration
+         *          - class declarations
+         *          - variable statements
+         *          - namespace declarations
+         *
+         * Hosts should ideally check that:
+         * - The line is all whitespace up to 'position' before performing the insertion.
+         * - If the keystroke sequence "/\*\*" induced the call, we also check that the next
+         * non-whitespace character is '*', which (approximately) indicates whether we added
+         * the second '*' to complete an existing (JSDoc) comment.
+         * @param fileName The file in which to perform the check.
+         * @param position The (character-indexed) position in the file where the check should
+         * be performed.
+         */
+        function getDocCommentTemplateAtPosition(fileName, position) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            // Check if in a context where we don't want to perform any insertion
+            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position) || ts.hasDocComment(sourceFile, position)) {
+                return undefined;
+            }
+            var tokenAtPos = ts.getTokenAtPosition(sourceFile, position);
+            var tokenStart = tokenAtPos.getStart();
+            if (!tokenAtPos || tokenStart < position) {
+                return undefined;
+            }
+            // TODO: add support for:
+            // - enums/enum members
+            // - interfaces
+            // - property declarations
+            // - potentially property assignments
+            var commentOwner;
+            findOwner: for (commentOwner = tokenAtPos; commentOwner; commentOwner = commentOwner.parent) {
+                switch (commentOwner.kind) {
+                    case 220 /* FunctionDeclaration */:
+                    case 147 /* MethodDeclaration */:
+                    case 148 /* Constructor */:
+                    case 221 /* ClassDeclaration */:
+                    case 200 /* VariableStatement */:
+                        break findOwner;
+                    case 256 /* SourceFile */:
+                        return undefined;
+                    case 225 /* ModuleDeclaration */:
+                        // If in walking up the tree, we hit a a nested namespace declaration,
+                        // then we must be somewhere within a dotted namespace name; however we don't
+                        // want to give back a JSDoc template for the 'b' or 'c' in 'namespace a.b.c { }'.
+                        if (commentOwner.parent.kind === 225 /* ModuleDeclaration */) {
+                            return undefined;
+                        }
+                        break findOwner;
+                }
+            }
+            if (!commentOwner || commentOwner.getStart() < position) {
+                return undefined;
+            }
+            var parameters = getParametersForJsDocOwningNode(commentOwner);
+            var posLineAndChar = sourceFile.getLineAndCharacterOfPosition(position);
+            var lineStart = sourceFile.getLineStarts()[posLineAndChar.line];
+            var indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character);
+            var newLine = ts.getNewLineOrDefaultFromHost(host);
+            var docParams = "";
+            for (var i = 0, numParams = parameters.length; i < numParams; i++) {
+                var currentName = parameters[i].name;
+                var paramName = currentName.kind === 69 /* Identifier */ ?
+                    currentName.text :
+                    "param" + i;
+                docParams += indentationStr + " * @param " + paramName + newLine;
+            }
+            // A doc comment consists of the following
+            // * The opening comment line
+            // * the first line (without a param) for the object's untagged info (this is also where the caret ends up)
+            // * the '@param'-tagged lines
+            // * TODO: other tags.
+            // * the closing comment line
+            // * if the caret was directly in front of the object, then we add an extra line and indentation.
+            var preamble = "/**" + newLine +
+                indentationStr + " * ";
+            var result = preamble + newLine +
+                docParams +
+                indentationStr + " */" +
+                (tokenStart === position ? newLine + indentationStr : "");
+            return { newText: result, caretOffset: preamble.length };
+        }
+        function isValidBraceCompletionAtPostion(fileName, position, openingBrace) {
+            // '<' is currently not supported, figuring out if we're in a Generic Type vs. a comparison is too
+            // expensive to do during typing scenarios
+            // i.e. whether we're dealing with:
+            //      var x = new foo<| ( with class foo<T>{} )
+            // or
+            //      var y = 3 <|
+            if (openingBrace === 60 /* lessThan */) {
+                return false;
+            }
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            // Check if in a context where we don't want to perform any insertion
+            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position)) {
+                return false;
+            }
+            if (ts.isInsideJsxElementOrAttribute(sourceFile, position)) {
+                return openingBrace === 123 /* openBrace */;
+            }
+            if (ts.isInTemplateString(sourceFile, position)) {
+                return false;
+            }
+            return true;
+        }
+        function getParametersForJsDocOwningNode(commentOwner) {
+            if (ts.isFunctionLike(commentOwner)) {
+                return commentOwner.parameters;
+            }
+            if (commentOwner.kind === 200 /* VariableStatement */) {
+                var varStatement = commentOwner;
+                var varDeclarations = varStatement.declarationList.declarations;
+                if (varDeclarations.length === 1 && varDeclarations[0].initializer) {
+                    return getParametersFromRightHandSideOfAssignment(varDeclarations[0].initializer);
+                }
+            }
+            return emptyArray;
+        }
+        /**
+         * Digs into an an initializer or RHS operand of an assignment operation
+         * to get the parameters of an apt signature corresponding to a
+         * function expression or a class expression.
+         *
+         * @param rightHandSide the expression which may contain an appropriate set of parameters
+         * @returns the parameters of a signature found on the RHS if one exists; otherwise 'emptyArray'.
+         */
+        function getParametersFromRightHandSideOfAssignment(rightHandSide) {
+            while (rightHandSide.kind === 178 /* ParenthesizedExpression */) {
+                rightHandSide = rightHandSide.expression;
+            }
+            switch (rightHandSide.kind) {
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    return rightHandSide.parameters;
+                case 192 /* ClassExpression */:
+                    for (var _i = 0, _a = rightHandSide.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        if (member.kind === 148 /* Constructor */) {
+                            return member.parameters;
+                        }
+                    }
+                    break;
+            }
+            return emptyArray;
+        }
+        function getTodoComments(fileName, descriptors) {
+            // Note: while getting todo comments seems like a syntactic operation, we actually
+            // treat it as a semantic operation here.  This is because we expect our host to call
+            // this on every single file.  If we treat this syntactically, then that will cause
+            // us to populate and throw away the tree in our syntax tree cache for each file.  By
+            // treating this as a semantic operation, we can access any tree without throwing
+            // anything away.
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            cancellationToken.throwIfCancellationRequested();
+            var fileContents = sourceFile.text;
+            var result = [];
+            if (descriptors.length > 0) {
+                var regExp = getTodoCommentsRegExp();
+                var matchArray = void 0;
+                while (matchArray = regExp.exec(fileContents)) {
+                    cancellationToken.throwIfCancellationRequested();
+                    // If we got a match, here is what the match array will look like.  Say the source text is:
+                    //
+                    //      "    // hack   1"
+                    //
+                    // The result array with the regexp:    will be:
+                    //
+                    //      ["// hack   1", "// ", "hack   1", undefined, "hack"]
+                    //
+                    // Here are the relevant capture groups:
+                    //  0) The full match for the entire regexp.
+                    //  1) The preamble to the message portion.
+                    //  2) The message portion.
+                    //  3...N) The descriptor that was matched - by index.  'undefined' for each
+                    //         descriptor that didn't match.  an actual value if it did match.
+                    //
+                    //  i.e. 'undefined' in position 3 above means TODO(jason) didn't match.
+                    //       "hack"      in position 4 means HACK did match.
+                    var firstDescriptorCaptureIndex = 3;
+                    ts.Debug.assert(matchArray.length === descriptors.length + firstDescriptorCaptureIndex);
+                    var preamble = matchArray[1];
+                    var matchPosition = matchArray.index + preamble.length;
+                    // OK, we have found a match in the file.  This is only an acceptable match if
+                    // it is contained within a comment.
+                    var token = ts.getTokenAtPosition(sourceFile, matchPosition);
+                    if (!isInsideComment(sourceFile, token, matchPosition)) {
+                        continue;
+                    }
+                    var descriptor = undefined;
+                    for (var i = 0, n = descriptors.length; i < n; i++) {
+                        if (matchArray[i + firstDescriptorCaptureIndex]) {
+                            descriptor = descriptors[i];
+                        }
+                    }
+                    ts.Debug.assert(descriptor !== undefined);
+                    // We don't want to match something like 'TODOBY', so we make sure a non
+                    // letter/digit follows the match.
+                    if (isLetterOrDigit(fileContents.charCodeAt(matchPosition + descriptor.text.length))) {
+                        continue;
+                    }
+                    var message = matchArray[2];
+                    result.push({
+                        descriptor: descriptor,
+                        message: message,
+                        position: matchPosition
+                    });
+                }
+            }
+            return result;
+            function escapeRegExp(str) {
+                return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
+            }
+            function getTodoCommentsRegExp() {
+                // NOTE: ?:  means 'non-capture group'.  It allows us to have groups without having to
+                // filter them out later in the final result array.
+                // TODO comments can appear in one of the following forms:
+                //
+                //  1)      // TODO     or  /////////// TODO
+                //
+                //  2)      /* TODO     or  /********** TODO
+                //
+                //  3)      /*
+                //           *   TODO
+                //           */
+                //
+                // The following three regexps are used to match the start of the text up to the TODO
+                // comment portion.
+                var singleLineCommentStart = /(?:\/\/+\s*)/.source;
+                var multiLineCommentStart = /(?:\/\*+\s*)/.source;
+                var anyNumberOfSpacesAndAsterisksAtStartOfLine = /(?:^(?:\s|\*)*)/.source;
+                // Match any of the above three TODO comment start regexps.
+                // Note that the outermost group *is* a capture group.  We want to capture the preamble
+                // so that we can determine the starting position of the TODO comment match.
+                var preamble = "(" + anyNumberOfSpacesAndAsterisksAtStartOfLine + "|" + singleLineCommentStart + "|" + multiLineCommentStart + ")";
+                // Takes the descriptors and forms a regexp that matches them as if they were literals.
+                // For example, if the descriptors are "TODO(jason)" and "HACK", then this will be:
+                //
+                //      (?:(TODO\(jason\))|(HACK))
+                //
+                // Note that the outermost group is *not* a capture group, but the innermost groups
+                // *are* capture groups.  By capturing the inner literals we can determine after
+                // matching which descriptor we are dealing with.
+                var literals = "(?:" + ts.map(descriptors, function (d) { return "(" + escapeRegExp(d.text) + ")"; }).join("|") + ")";
+                // After matching a descriptor literal, the following regexp matches the rest of the
+                // text up to the end of the line (or */).
+                var endOfLineOrEndOfComment = /(?:$|\*\/)/.source;
+                var messageRemainder = /(?:.*?)/.source;
+                // This is the portion of the match we'll return as part of the TODO comment result. We
+                // match the literal portion up to the end of the line or end of comment.
+                var messagePortion = "(" + literals + messageRemainder + ")";
+                var regExpString = preamble + messagePortion + endOfLineOrEndOfComment;
+                // The final regexp will look like this:
+                // /((?:\/\/+\s*)|(?:\/\*+\s*)|(?:^(?:\s|\*)*))((?:(TODO\(jason\))|(HACK))(?:.*?))(?:$|\*\/)/gim
+                // The flags of the regexp are important here.
+                //  'g' is so that we are doing a global search and can find matches several times
+                //  in the input.
+                //
+                //  'i' is for case insensitivity (We do this to match C# TODO comment code).
+                //
+                //  'm' is so we can find matches in a multi-line input.
+                return new RegExp(regExpString, "gim");
+            }
+            function isLetterOrDigit(char) {
+                return (char >= 97 /* a */ && char <= 122 /* z */) ||
+                    (char >= 65 /* A */ && char <= 90 /* Z */) ||
+                    (char >= 48 /* _0 */ && char <= 57 /* _9 */);
+            }
+        }
+        function getStringLiteralTypeForNode(node, typeChecker) {
+            var searchNode = node.parent.kind === 166 /* StringLiteralType */ ? node.parent : node;
+            var type = typeChecker.getTypeAtLocation(searchNode);
+            if (type && type.flags & 256 /* StringLiteral */) {
+                return type;
+            }
+            return undefined;
+        }
+        function getRenameInfo(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var typeChecker = program.getTypeChecker();
+            var defaultLibFileName = host.getDefaultLibFileName(host.getCompilationSettings());
+            var canonicalDefaultLibName = getCanonicalFileName(ts.normalizePath(defaultLibFileName));
+            var node = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ true);
+            // Can only rename an identifier.
+            if (node) {
+                if (node.kind === 69 /* Identifier */ ||
+                    node.kind === 9 /* StringLiteral */ ||
+                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                    var symbol = typeChecker.getSymbolAtLocation(node);
+                    // Only allow a symbol to be renamed if it actually has at least one declaration.
+                    if (symbol) {
+                        var declarations = symbol.getDeclarations();
+                        if (declarations && declarations.length > 0) {
+                            // Disallow rename for elements that are defined in the standard TypeScript library.
+                            if (ts.forEach(declarations, isDefinedInLibraryFile)) {
+                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
+                            }
+                            var displayName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
+                            var kind = getSymbolKind(symbol, node);
+                            if (kind) {
+                                return {
+                                    canRename: true,
+                                    kind: kind,
+                                    displayName: displayName,
+                                    localizedErrorMessage: undefined,
+                                    fullDisplayName: typeChecker.getFullyQualifiedName(symbol),
+                                    kindModifiers: getSymbolModifiers(symbol),
+                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
+                                };
+                            }
+                        }
+                    }
+                    else if (node.kind === 9 /* StringLiteral */) {
+                        var type = getStringLiteralTypeForNode(node, typeChecker);
+                        if (type) {
+                            if (isDefinedInLibraryFile(node)) {
+                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
+                            }
+                            else {
+                                var displayName = ts.stripQuotes(type.text);
+                                return {
+                                    canRename: true,
+                                    kind: ScriptElementKind.variableElement,
+                                    displayName: displayName,
+                                    localizedErrorMessage: undefined,
+                                    fullDisplayName: displayName,
+                                    kindModifiers: ScriptElementKindModifier.none,
+                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
+                                };
+                            }
+                        }
+                    }
+                }
+            }
+            return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_this_element));
+            function getRenameInfoError(localizedErrorMessage) {
+                return {
+                    canRename: false,
+                    localizedErrorMessage: localizedErrorMessage,
+                    displayName: undefined,
+                    fullDisplayName: undefined,
+                    kind: undefined,
+                    kindModifiers: undefined,
+                    triggerSpan: undefined
+                };
+            }
+            function isDefinedInLibraryFile(declaration) {
+                if (defaultLibFileName) {
+                    var sourceFile_2 = declaration.getSourceFile();
+                    var canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile_2.fileName));
+                    if (canonicalName === canonicalDefaultLibName) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function createTriggerSpanForNode(node, sourceFile) {
+                var start = node.getStart(sourceFile);
+                var width = node.getWidth(sourceFile);
+                if (node.kind === 9 /* StringLiteral */) {
+                    // Exclude the quotes
+                    start += 1;
+                    width -= 2;
+                }
+                return ts.createTextSpan(start, width);
+            }
+        }
+        return {
+            dispose: dispose,
+            cleanupSemanticCache: cleanupSemanticCache,
+            getSyntacticDiagnostics: getSyntacticDiagnostics,
+            getSemanticDiagnostics: getSemanticDiagnostics,
+            getCompilerOptionsDiagnostics: getCompilerOptionsDiagnostics,
+            getSyntacticClassifications: getSyntacticClassifications,
+            getSemanticClassifications: getSemanticClassifications,
+            getEncodedSyntacticClassifications: getEncodedSyntacticClassifications,
+            getEncodedSemanticClassifications: getEncodedSemanticClassifications,
+            getCompletionsAtPosition: getCompletionsAtPosition,
+            getCompletionEntryDetails: getCompletionEntryDetails,
+            getSignatureHelpItems: getSignatureHelpItems,
+            getQuickInfoAtPosition: getQuickInfoAtPosition,
+            getDefinitionAtPosition: getDefinitionAtPosition,
+            getTypeDefinitionAtPosition: getTypeDefinitionAtPosition,
+            getReferencesAtPosition: getReferencesAtPosition,
+            findReferences: findReferences,
+            getOccurrencesAtPosition: getOccurrencesAtPosition,
+            getDocumentHighlights: getDocumentHighlights,
+            getNameOrDottedNameSpan: getNameOrDottedNameSpan,
+            getBreakpointStatementAtPosition: getBreakpointStatementAtPosition,
+            getNavigateToItems: getNavigateToItems,
+            getRenameInfo: getRenameInfo,
+            findRenameLocations: findRenameLocations,
+            getNavigationBarItems: getNavigationBarItems,
+            getOutliningSpans: getOutliningSpans,
+            getTodoComments: getTodoComments,
+            getBraceMatchingAtPosition: getBraceMatchingAtPosition,
+            getIndentationAtPosition: getIndentationAtPosition,
+            getFormattingEditsForRange: getFormattingEditsForRange,
+            getFormattingEditsForDocument: getFormattingEditsForDocument,
+            getFormattingEditsAfterKeystroke: getFormattingEditsAfterKeystroke,
+            getDocCommentTemplateAtPosition: getDocCommentTemplateAtPosition,
+            isValidBraceCompletionAtPostion: isValidBraceCompletionAtPostion,
+            getEmitOutput: getEmitOutput,
+            getNonBoundSourceFile: getNonBoundSourceFile,
+            getProgram: getProgram
+        };
+    }
+    ts.createLanguageService = createLanguageService;
+    /* @internal */
+    function getNameTable(sourceFile) {
+        if (!sourceFile.nameTable) {
+            initializeNameTable(sourceFile);
+        }
+        return sourceFile.nameTable;
+    }
+    ts.getNameTable = getNameTable;
+    function initializeNameTable(sourceFile) {
+        var nameTable = {};
+        walk(sourceFile);
+        sourceFile.nameTable = nameTable;
+        function walk(node) {
+            switch (node.kind) {
+                case 69 /* Identifier */:
+                    nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
+                    break;
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                    // We want to store any numbers/strings if they were a name that could be
+                    // related to a declaration.  So, if we have 'import x = require("something")'
+                    // then we want 'something' to be in the name table.  Similarly, if we have
+                    // "a['propname']" then we want to store "propname" in the name table.
+                    if (ts.isDeclarationName(node) ||
+                        node.parent.kind === 240 /* ExternalModuleReference */ ||
+                        isArgumentOfElementAccessExpression(node) ||
+                        ts.isLiteralComputedPropertyDeclarationName(node)) {
+                        nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
+                    }
+                    break;
+                default:
+                    ts.forEachChild(node, walk);
+                    if (node.jsDocComments) {
+                        for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                            var jsDocComment = _a[_i];
+                            ts.forEachChild(jsDocComment, walk);
+                        }
+                    }
+            }
+        }
+    }
+    function isArgumentOfElementAccessExpression(node) {
+        return node &&
+            node.parent &&
+            node.parent.kind === 173 /* ElementAccessExpression */ &&
+            node.parent.argumentExpression === node;
+    }
+    /// Classifier
+    function createClassifier() {
+        var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false);
+        /// We do not have a full parser support to know when we should parse a regex or not
+        /// If we consider every slash token to be a regex, we could be missing cases like "1/2/3", where
+        /// we have a series of divide operator. this list allows us to be more accurate by ruling out
+        /// locations where a regexp cannot exist.
+        var noRegexTable = [];
+        noRegexTable[69 /* Identifier */] = true;
+        noRegexTable[9 /* StringLiteral */] = true;
+        noRegexTable[8 /* NumericLiteral */] = true;
+        noRegexTable[10 /* RegularExpressionLiteral */] = true;
+        noRegexTable[97 /* ThisKeyword */] = true;
+        noRegexTable[41 /* PlusPlusToken */] = true;
+        noRegexTable[42 /* MinusMinusToken */] = true;
+        noRegexTable[18 /* CloseParenToken */] = true;
+        noRegexTable[20 /* CloseBracketToken */] = true;
+        noRegexTable[16 /* CloseBraceToken */] = true;
+        noRegexTable[99 /* TrueKeyword */] = true;
+        noRegexTable[84 /* FalseKeyword */] = true;
+        // Just a stack of TemplateHeads and OpenCurlyBraces, used to perform rudimentary (inexact)
+        // classification on template strings. Because of the context free nature of templates,
+        // the only precise way to classify a template portion would be by propagating the stack across
+        // lines, just as we do with the end-of-line state. However, this is a burden for implementers,
+        // and the behavior is entirely subsumed by the syntactic classifier anyway, so we instead
+        // flatten any nesting when the template stack is non-empty and encode it in the end-of-line state.
+        // Situations in which this fails are
+        //  1) When template strings are nested across different lines:
+        //          `hello ${ `world
+        //          ` }`
+        //
+        //     Where on the second line, you will get the closing of a template,
+        //     a closing curly, and a new template.
+        //
+        //  2) When substitution expressions have curly braces and the curly brace falls on the next line:
+        //          `hello ${ () => {
+        //          return "world" } } `
+        //
+        //     Where on the second line, you will get the 'return' keyword,
+        //     a string literal, and a template end consisting of '} } `'.
+        var templateStack = [];
+        /** Returns true if 'keyword2' can legally follow 'keyword1' in any language construct. */
+        function canFollow(keyword1, keyword2) {
+            if (ts.isAccessibilityModifier(keyword1)) {
+                if (keyword2 === 123 /* GetKeyword */ ||
+                    keyword2 === 131 /* SetKeyword */ ||
+                    keyword2 === 121 /* ConstructorKeyword */ ||
+                    keyword2 === 113 /* StaticKeyword */) {
+                    // Allow things like "public get", "public constructor" and "public static".
+                    // These are all legal.
+                    return true;
+                }
+                // Any other keyword following "public" is actually an identifier an not a real
+                // keyword.
+                return false;
+            }
+            // Assume any other keyword combination is legal.  This can be refined in the future
+            // if there are more cases we want the classifier to be better at.
+            return true;
+        }
+        function convertClassifications(classifications, text) {
+            var entries = [];
+            var dense = classifications.spans;
+            var lastEnd = 0;
+            for (var i = 0, n = dense.length; i < n; i += 3) {
+                var start = dense[i];
+                var length_3 = dense[i + 1];
+                var type = dense[i + 2];
+                // Make a whitespace entry between the last item and this one.
+                if (lastEnd >= 0) {
+                    var whitespaceLength_1 = start - lastEnd;
+                    if (whitespaceLength_1 > 0) {
+                        entries.push({ length: whitespaceLength_1, classification: TokenClass.Whitespace });
+                    }
+                }
+                entries.push({ length: length_3, classification: convertClassification(type) });
+                lastEnd = start + length_3;
+            }
+            var whitespaceLength = text.length - lastEnd;
+            if (whitespaceLength > 0) {
+                entries.push({ length: whitespaceLength, classification: TokenClass.Whitespace });
+            }
+            return { entries: entries, finalLexState: classifications.endOfLineState };
+        }
+        function convertClassification(type) {
+            switch (type) {
+                case 1 /* comment */: return TokenClass.Comment;
+                case 3 /* keyword */: return TokenClass.Keyword;
+                case 4 /* numericLiteral */: return TokenClass.NumberLiteral;
+                case 5 /* operator */: return TokenClass.Operator;
+                case 6 /* stringLiteral */: return TokenClass.StringLiteral;
+                case 8 /* whiteSpace */: return TokenClass.Whitespace;
+                case 10 /* punctuation */: return TokenClass.Punctuation;
+                case 2 /* identifier */:
+                case 11 /* className */:
+                case 12 /* enumName */:
+                case 13 /* interfaceName */:
+                case 14 /* moduleName */:
+                case 15 /* typeParameterName */:
+                case 16 /* typeAliasName */:
+                case 9 /* text */:
+                case 17 /* parameterName */:
+                default:
+                    return TokenClass.Identifier;
+            }
+        }
+        function getClassificationsForLine(text, lexState, syntacticClassifierAbsent) {
+            return convertClassifications(getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent), text);
+        }
+        // If there is a syntactic classifier ('syntacticClassifierAbsent' is false),
+        // we will be more conservative in order to avoid conflicting with the syntactic classifier.
+        function getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent) {
+            var offset = 0;
+            var token = 0 /* Unknown */;
+            var lastNonTriviaToken = 0 /* Unknown */;
+            // Empty out the template stack for reuse.
+            while (templateStack.length > 0) {
+                templateStack.pop();
+            }
+            // If we're in a string literal, then prepend: "\
+            // (and a newline).  That way when we lex we'll think we're still in a string literal.
+            //
+            // If we're in a multiline comment, then prepend: /*
+            // (and a newline).  That way when we lex we'll think we're still in a multiline comment.
+            switch (lexState) {
+                case 3 /* InDoubleQuoteStringLiteral */:
+                    text = "\"\\\n" + text;
+                    offset = 3;
+                    break;
+                case 2 /* InSingleQuoteStringLiteral */:
+                    text = "'\\\n" + text;
+                    offset = 3;
+                    break;
+                case 1 /* InMultiLineCommentTrivia */:
+                    text = "/*\n" + text;
+                    offset = 3;
+                    break;
+                case 4 /* InTemplateHeadOrNoSubstitutionTemplate */:
+                    text = "`\n" + text;
+                    offset = 2;
+                    break;
+                case 5 /* InTemplateMiddleOrTail */:
+                    text = "}\n" + text;
+                    offset = 2;
+                // fallthrough
+                case 6 /* InTemplateSubstitutionPosition */:
+                    templateStack.push(12 /* TemplateHead */);
+                    break;
+            }
+            scanner.setText(text);
+            var result = {
+                endOfLineState: 0 /* None */,
+                spans: []
+            };
+            // We can run into an unfortunate interaction between the lexical and syntactic classifier
+            // when the user is typing something generic.  Consider the case where the user types:
+            //
+            //      Foo<number
+            //
+            // From the lexical classifier's perspective, 'number' is a keyword, and so the word will
+            // be classified as such.  However, from the syntactic classifier's tree-based perspective
+            // this is simply an expression with the identifier 'number' on the RHS of the less than
+            // token.  So the classification will go back to being an identifier.  The moment the user
+            // types again, number will become a keyword, then an identifier, etc. etc.
+            //
+            // To try to avoid this problem, we avoid classifying contextual keywords as keywords
+            // when the user is potentially typing something generic.  We just can't do a good enough
+            // job at the lexical level, and so well leave it up to the syntactic classifier to make
+            // the determination.
+            //
+            // In order to determine if the user is potentially typing something generic, we use a
+            // weak heuristic where we track < and > tokens.  It's a weak heuristic, but should
+            // work well enough in practice.
+            var angleBracketStack = 0;
+            do {
+                token = scanner.scan();
+                if (!ts.isTrivia(token)) {
+                    if ((token === 39 /* SlashToken */ || token === 61 /* SlashEqualsToken */) && !noRegexTable[lastNonTriviaToken]) {
+                        if (scanner.reScanSlashToken() === 10 /* RegularExpressionLiteral */) {
+                            token = 10 /* RegularExpressionLiteral */;
+                        }
+                    }
+                    else if (lastNonTriviaToken === 21 /* DotToken */ && isKeyword(token)) {
+                        token = 69 /* Identifier */;
+                    }
+                    else if (isKeyword(lastNonTriviaToken) && isKeyword(token) && !canFollow(lastNonTriviaToken, token)) {
+                        // We have two keywords in a row.  Only treat the second as a keyword if
+                        // it's a sequence that could legally occur in the language.  Otherwise
+                        // treat it as an identifier.  This way, if someone writes "private var"
+                        // we recognize that 'var' is actually an identifier here.
+                        token = 69 /* Identifier */;
+                    }
+                    else if (lastNonTriviaToken === 69 /* Identifier */ &&
+                        token === 25 /* LessThanToken */) {
+                        // Could be the start of something generic.  Keep track of that by bumping
+                        // up the current count of generic contexts we may be in.
+                        angleBracketStack++;
+                    }
+                    else if (token === 27 /* GreaterThanToken */ && angleBracketStack > 0) {
+                        // If we think we're currently in something generic, then mark that that
+                        // generic entity is complete.
+                        angleBracketStack--;
+                    }
+                    else if (token === 117 /* AnyKeyword */ ||
+                        token === 132 /* StringKeyword */ ||
+                        token === 130 /* NumberKeyword */ ||
+                        token === 120 /* BooleanKeyword */ ||
+                        token === 133 /* SymbolKeyword */) {
+                        if (angleBracketStack > 0 && !syntacticClassifierAbsent) {
+                            // If it looks like we're could be in something generic, don't classify this
+                            // as a keyword.  We may just get overwritten by the syntactic classifier,
+                            // causing a noisy experience for the user.
+                            token = 69 /* Identifier */;
+                        }
+                    }
+                    else if (token === 12 /* TemplateHead */) {
+                        templateStack.push(token);
+                    }
+                    else if (token === 15 /* OpenBraceToken */) {
+                        // If we don't have anything on the template stack,
+                        // then we aren't trying to keep track of a previously scanned template head.
+                        if (templateStack.length > 0) {
+                            templateStack.push(token);
+                        }
+                    }
+                    else if (token === 16 /* CloseBraceToken */) {
+                        // If we don't have anything on the template stack,
+                        // then we aren't trying to keep track of a previously scanned template head.
+                        if (templateStack.length > 0) {
+                            var lastTemplateStackToken = ts.lastOrUndefined(templateStack);
+                            if (lastTemplateStackToken === 12 /* TemplateHead */) {
+                                token = scanner.reScanTemplateToken();
+                                // Only pop on a TemplateTail; a TemplateMiddle indicates there is more for us.
+                                if (token === 14 /* TemplateTail */) {
+                                    templateStack.pop();
+                                }
+                                else {
+                                    ts.Debug.assert(token === 13 /* TemplateMiddle */, "Should have been a template middle. Was " + token);
+                                }
+                            }
+                            else {
+                                ts.Debug.assert(lastTemplateStackToken === 15 /* OpenBraceToken */, "Should have been an open brace. Was: " + token);
+                                templateStack.pop();
+                            }
+                        }
+                    }
+                    lastNonTriviaToken = token;
+                }
+                processToken();
+            } while (token !== 1 /* EndOfFileToken */);
+            return result;
+            function processToken() {
+                var start = scanner.getTokenPos();
+                var end = scanner.getTextPos();
+                addResult(start, end, classFromKind(token));
+                if (end >= text.length) {
+                    if (token === 9 /* StringLiteral */ || token === 166 /* StringLiteralType */) {
+                        // Check to see if we finished up on a multiline string literal.
+                        var tokenText = scanner.getTokenText();
+                        if (scanner.isUnterminated()) {
+                            var lastCharIndex = tokenText.length - 1;
+                            var numBackslashes = 0;
+                            while (tokenText.charCodeAt(lastCharIndex - numBackslashes) === 92 /* backslash */) {
+                                numBackslashes++;
+                            }
+                            // If we have an odd number of backslashes, then the multiline string is unclosed
+                            if (numBackslashes & 1) {
+                                var quoteChar = tokenText.charCodeAt(0);
+                                result.endOfLineState = quoteChar === 34 /* doubleQuote */
+                                    ? 3 /* InDoubleQuoteStringLiteral */
+                                    : 2 /* InSingleQuoteStringLiteral */;
+                            }
+                        }
+                    }
+                    else if (token === 3 /* MultiLineCommentTrivia */) {
+                        // Check to see if the multiline comment was unclosed.
+                        if (scanner.isUnterminated()) {
+                            result.endOfLineState = 1 /* InMultiLineCommentTrivia */;
+                        }
+                    }
+                    else if (ts.isTemplateLiteralKind(token)) {
+                        if (scanner.isUnterminated()) {
+                            if (token === 14 /* TemplateTail */) {
+                                result.endOfLineState = 5 /* InTemplateMiddleOrTail */;
+                            }
+                            else if (token === 11 /* NoSubstitutionTemplateLiteral */) {
+                                result.endOfLineState = 4 /* InTemplateHeadOrNoSubstitutionTemplate */;
+                            }
+                            else {
+                                ts.Debug.fail("Only 'NoSubstitutionTemplateLiteral's and 'TemplateTail's can be unterminated; got SyntaxKind #" + token);
+                            }
+                        }
+                    }
+                    else if (templateStack.length > 0 && ts.lastOrUndefined(templateStack) === 12 /* TemplateHead */) {
+                        result.endOfLineState = 6 /* InTemplateSubstitutionPosition */;
+                    }
+                }
+            }
+            function addResult(start, end, classification) {
+                if (classification === 8 /* whiteSpace */) {
+                    // Don't bother with whitespace classifications.  They're not needed.
+                    return;
+                }
+                if (start === 0 && offset > 0) {
+                    // We're classifying the first token, and this was a case where we prepended
+                    // text.  We should consider the start of this token to be at the start of
+                    // the original text.
+                    start += offset;
+                }
+                // All our tokens are in relation to the augmented text.  Move them back to be
+                // relative to the original text.
+                start -= offset;
+                end -= offset;
+                var length = end - start;
+                if (length > 0) {
+                    result.spans.push(start);
+                    result.spans.push(length);
+                    result.spans.push(classification);
+                }
+            }
+        }
+        function isBinaryExpressionOperatorToken(token) {
+            switch (token) {
+                case 37 /* AsteriskToken */:
+                case 39 /* SlashToken */:
+                case 40 /* PercentToken */:
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                case 43 /* LessThanLessThanToken */:
+                case 44 /* GreaterThanGreaterThanToken */:
+                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
+                case 25 /* LessThanToken */:
+                case 27 /* GreaterThanToken */:
+                case 28 /* LessThanEqualsToken */:
+                case 29 /* GreaterThanEqualsToken */:
+                case 91 /* InstanceOfKeyword */:
+                case 90 /* InKeyword */:
+                case 116 /* AsKeyword */:
+                case 30 /* EqualsEqualsToken */:
+                case 31 /* ExclamationEqualsToken */:
+                case 32 /* EqualsEqualsEqualsToken */:
+                case 33 /* ExclamationEqualsEqualsToken */:
+                case 46 /* AmpersandToken */:
+                case 48 /* CaretToken */:
+                case 47 /* BarToken */:
+                case 51 /* AmpersandAmpersandToken */:
+                case 52 /* BarBarToken */:
+                case 67 /* BarEqualsToken */:
+                case 66 /* AmpersandEqualsToken */:
+                case 68 /* CaretEqualsToken */:
+                case 63 /* LessThanLessThanEqualsToken */:
+                case 64 /* GreaterThanGreaterThanEqualsToken */:
+                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                case 57 /* PlusEqualsToken */:
+                case 58 /* MinusEqualsToken */:
+                case 59 /* AsteriskEqualsToken */:
+                case 61 /* SlashEqualsToken */:
+                case 62 /* PercentEqualsToken */:
+                case 56 /* EqualsToken */:
+                case 24 /* CommaToken */:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isPrefixUnaryExpressionOperatorToken(token) {
+            switch (token) {
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                case 50 /* TildeToken */:
+                case 49 /* ExclamationToken */:
+                case 41 /* PlusPlusToken */:
+                case 42 /* MinusMinusToken */:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isKeyword(token) {
+            return token >= 70 /* FirstKeyword */ && token <= 138 /* LastKeyword */;
+        }
+        function classFromKind(token) {
+            if (isKeyword(token)) {
+                return 3 /* keyword */;
+            }
+            else if (isBinaryExpressionOperatorToken(token) || isPrefixUnaryExpressionOperatorToken(token)) {
+                return 5 /* operator */;
+            }
+            else if (token >= 15 /* FirstPunctuation */ && token <= 68 /* LastPunctuation */) {
+                return 10 /* punctuation */;
+            }
+            switch (token) {
+                case 8 /* NumericLiteral */:
+                    return 4 /* numericLiteral */;
+                case 9 /* StringLiteral */:
+                case 166 /* StringLiteralType */:
+                    return 6 /* stringLiteral */;
+                case 10 /* RegularExpressionLiteral */:
+                    return 7 /* regularExpressionLiteral */;
+                case 7 /* ConflictMarkerTrivia */:
+                case 3 /* MultiLineCommentTrivia */:
+                case 2 /* SingleLineCommentTrivia */:
+                    return 1 /* comment */;
+                case 5 /* WhitespaceTrivia */:
+                case 4 /* NewLineTrivia */:
+                    return 8 /* whiteSpace */;
+                case 69 /* Identifier */:
+                default:
+                    if (ts.isTemplateLiteralKind(token)) {
+                        return 6 /* stringLiteral */;
+                    }
+                    return 2 /* identifier */;
+            }
+        }
+        return {
+            getClassificationsForLine: getClassificationsForLine,
+            getEncodedLexicalClassifications: getEncodedLexicalClassifications
+        };
+    }
+    ts.createClassifier = createClassifier;
+    /**
+      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
+      * node package.
+      * The functionality is not supported if the ts module is consumed outside of a node module.
+      */
+    function getDefaultLibFilePath(options) {
+        // Check __dirname is defined and that we are on a node.js system.
+        if (typeof __dirname !== "undefined") {
+            return __dirname + ts.directorySeparator + ts.getDefaultLibFileName(options);
+        }
+        throw new Error("getDefaultLibFilePath is only supported when consumed as a node module. ");
+    }
+    ts.getDefaultLibFilePath = getDefaultLibFilePath;
+    function initializeServices() {
+        ts.objectAllocator = {
+            getNodeConstructor: function () { return NodeObject; },
+            getSourceFileConstructor: function () { return SourceFileObject; },
+            getSymbolConstructor: function () { return SymbolObject; },
+            getTypeConstructor: function () { return TypeObject; },
+            getSignatureConstructor: function () { return SignatureObject; }
+        };
+    }
+    initializeServices();
+})(ts || (ts = {}));
+// Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0.
+// See LICENSE.txt in the project root for complete license information.
+/// <reference path='services.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var BreakpointResolver;
+    (function (BreakpointResolver) {
+        /**
+         * Get the breakpoint span in given sourceFile
+         */
+        function spanInSourceFileAtLocation(sourceFile, position) {
+            // Cannot set breakpoint in dts file
+            if (sourceFile.isDeclarationFile) {
+                return undefined;
+            }
+            var tokenAtLocation = ts.getTokenAtPosition(sourceFile, position);
+            var lineOfPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
+            if (sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getStart(sourceFile)).line > lineOfPosition) {
+                // Get previous token if the token is returned starts on new line
+                // eg: let x =10; |--- cursor is here
+                //     let y = 10;
+                // token at position will return let keyword on second line as the token but we would like to use
+                // token on same line if trailing trivia (comments or white spaces on same line) part of the last token on that line
+                tokenAtLocation = ts.findPrecedingToken(tokenAtLocation.pos, sourceFile);
+                // It's a blank line
+                if (!tokenAtLocation || sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getEnd()).line !== lineOfPosition) {
+                    return undefined;
+                }
+            }
+            // Cannot set breakpoint in ambient declarations
+            if (ts.isInAmbientContext(tokenAtLocation)) {
+                return undefined;
+            }
+            // Get the span in the node based on its syntax
+            return spanInNode(tokenAtLocation);
+            function textSpan(startNode, endNode) {
+                var start = startNode.decorators ?
+                    ts.skipTrivia(sourceFile.text, startNode.decorators.end) :
+                    startNode.getStart(sourceFile);
+                return ts.createTextSpanFromBounds(start, (endNode || startNode).getEnd());
+            }
+            function textSpanEndingAtNextToken(startNode, previousTokenToFindNextEndToken) {
+                return textSpan(startNode, ts.findNextToken(previousTokenToFindNextEndToken, previousTokenToFindNextEndToken.parent));
+            }
+            function spanInNodeIfStartsOnSameLine(node, otherwiseOnNode) {
+                if (node && lineOfPosition === sourceFile.getLineAndCharacterOfPosition(node.getStart(sourceFile)).line) {
+                    return spanInNode(node);
+                }
+                return spanInNode(otherwiseOnNode);
+            }
+            function spanInNodeArray(nodeArray) {
+                return ts.createTextSpanFromBounds(ts.skipTrivia(sourceFile.text, nodeArray.pos), nodeArray.end);
+            }
+            function spanInPreviousNode(node) {
+                return spanInNode(ts.findPrecedingToken(node.pos, sourceFile));
+            }
+            function spanInNextNode(node) {
+                return spanInNode(ts.findNextToken(node, node.parent));
+            }
+            function spanInNode(node) {
+                if (node) {
+                    switch (node.kind) {
+                        case 200 /* VariableStatement */:
+                            // Span on first variable declaration
+                            return spanInVariableDeclaration(node.declarationList.declarations[0]);
+                        case 218 /* VariableDeclaration */:
+                        case 145 /* PropertyDeclaration */:
+                        case 144 /* PropertySignature */:
+                            return spanInVariableDeclaration(node);
+                        case 142 /* Parameter */:
+                            return spanInParameterDeclaration(node);
+                        case 220 /* FunctionDeclaration */:
+                        case 147 /* MethodDeclaration */:
+                        case 146 /* MethodSignature */:
+                        case 149 /* GetAccessor */:
+                        case 150 /* SetAccessor */:
+                        case 148 /* Constructor */:
+                        case 179 /* FunctionExpression */:
+                        case 180 /* ArrowFunction */:
+                            return spanInFunctionDeclaration(node);
+                        case 199 /* Block */:
+                            if (ts.isFunctionBlock(node)) {
+                                return spanInFunctionBlock(node);
+                            }
+                        // Fall through
+                        case 226 /* ModuleBlock */:
+                            return spanInBlock(node);
+                        case 252 /* CatchClause */:
+                            return spanInBlock(node.block);
+                        case 202 /* ExpressionStatement */:
+                            // span on the expression
+                            return textSpan(node.expression);
+                        case 211 /* ReturnStatement */:
+                            // span on return keyword and expression if present
+                            return textSpan(node.getChildAt(0), node.expression);
+                        case 205 /* WhileStatement */:
+                            // Span on while(...)
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 204 /* DoStatement */:
+                            // span in statement of the do statement
+                            return spanInNode(node.statement);
+                        case 217 /* DebuggerStatement */:
+                            // span on debugger keyword
+                            return textSpan(node.getChildAt(0));
+                        case 203 /* IfStatement */:
+                            // set on if(..) span
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 214 /* LabeledStatement */:
+                            // span in statement
+                            return spanInNode(node.statement);
+                        case 210 /* BreakStatement */:
+                        case 209 /* ContinueStatement */:
+                            // On break or continue keyword and label if present
+                            return textSpan(node.getChildAt(0), node.label);
+                        case 206 /* ForStatement */:
+                            return spanInForStatement(node);
+                        case 207 /* ForInStatement */:
+                            // span of for (a in ...)
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 208 /* ForOfStatement */:
+                            // span in initializer
+                            return spanInInitializerOfForLike(node);
+                        case 213 /* SwitchStatement */:
+                            // span on switch(...)
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 249 /* CaseClause */:
+                        case 250 /* DefaultClause */:
+                            // span in first statement of the clause
+                            return spanInNode(node.statements[0]);
+                        case 216 /* TryStatement */:
+                            // span in try block
+                            return spanInBlock(node.tryBlock);
+                        case 215 /* ThrowStatement */:
+                            // span in throw ...
+                            return textSpan(node, node.expression);
+                        case 235 /* ExportAssignment */:
+                            // span on export = id
+                            return textSpan(node, node.expression);
+                        case 229 /* ImportEqualsDeclaration */:
+                            // import statement without including semicolon
+                            return textSpan(node, node.moduleReference);
+                        case 230 /* ImportDeclaration */:
+                            // import statement without including semicolon
+                            return textSpan(node, node.moduleSpecifier);
+                        case 236 /* ExportDeclaration */:
+                            // import statement without including semicolon
+                            return textSpan(node, node.moduleSpecifier);
+                        case 225 /* ModuleDeclaration */:
+                            // span on complete module if it is instantiated
+                            if (ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+                                return undefined;
+                            }
+                        case 221 /* ClassDeclaration */:
+                        case 224 /* EnumDeclaration */:
+                        case 255 /* EnumMember */:
+                        case 169 /* BindingElement */:
+                            // span on complete node
+                            return textSpan(node);
+                        case 212 /* WithStatement */:
+                            // span in statement
+                            return spanInNode(node.statement);
+                        case 143 /* Decorator */:
+                            return spanInNodeArray(node.parent.decorators);
+                        case 167 /* ObjectBindingPattern */:
+                        case 168 /* ArrayBindingPattern */:
+                            return spanInBindingPattern(node);
+                        // No breakpoint in interface, type alias
+                        case 222 /* InterfaceDeclaration */:
+                        case 223 /* TypeAliasDeclaration */:
+                            return undefined;
+                        // Tokens:
+                        case 23 /* SemicolonToken */:
+                        case 1 /* EndOfFileToken */:
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile));
+                        case 24 /* CommaToken */:
+                            return spanInPreviousNode(node);
+                        case 15 /* OpenBraceToken */:
+                            return spanInOpenBraceToken(node);
+                        case 16 /* CloseBraceToken */:
+                            return spanInCloseBraceToken(node);
+                        case 20 /* CloseBracketToken */:
+                            return spanInCloseBracketToken(node);
+                        case 17 /* OpenParenToken */:
+                            return spanInOpenParenToken(node);
+                        case 18 /* CloseParenToken */:
+                            return spanInCloseParenToken(node);
+                        case 54 /* ColonToken */:
+                            return spanInColonToken(node);
+                        case 27 /* GreaterThanToken */:
+                        case 25 /* LessThanToken */:
+                            return spanInGreaterThanOrLessThanToken(node);
+                        // Keywords:
+                        case 104 /* WhileKeyword */:
+                            return spanInWhileKeyword(node);
+                        case 80 /* ElseKeyword */:
+                        case 72 /* CatchKeyword */:
+                        case 85 /* FinallyKeyword */:
+                            return spanInNextNode(node);
+                        case 138 /* OfKeyword */:
+                            return spanInOfKeyword(node);
+                        default:
+                            // Destructuring pattern in destructuring assignment
+                            // [a, b, c] of
+                            // [a, b, c] = expression
+                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node)) {
+                                return spanInArrayLiteralOrObjectLiteralDestructuringPattern(node);
+                            }
+                            // Set breakpoint on identifier element of destructuring pattern
+                            // a or ...c  or d: x from
+                            // [a, b, ...c] or { a, b } or { d: x } from destructuring pattern
+                            if ((node.kind === 69 /* Identifier */ ||
+                                node.kind == 191 /* SpreadElementExpression */ ||
+                                node.kind === 253 /* PropertyAssignment */ ||
+                                node.kind === 254 /* ShorthandPropertyAssignment */) &&
+                                ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
+                                return textSpan(node);
+                            }
+                            if (node.kind === 187 /* BinaryExpression */) {
+                                var binaryExpression = node;
+                                // Set breakpoint in destructuring pattern if its destructuring assignment
+                                // [a, b, c] or {a, b, c} of
+                                // [a, b, c] = expression or
+                                // {a, b, c} = expression
+                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left)) {
+                                    return spanInArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left);
+                                }
+                                if (binaryExpression.operatorToken.kind === 56 /* EqualsToken */ &&
+                                    ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.parent)) {
+                                    // Set breakpoint on assignment expression element of destructuring pattern
+                                    // a = expression of
+                                    // [a = expression, b, c] = someExpression or
+                                    // { a = expression, b, c } = someExpression
+                                    return textSpan(node);
+                                }
+                                if (binaryExpression.operatorToken.kind === 24 /* CommaToken */) {
+                                    return spanInNode(binaryExpression.left);
+                                }
+                            }
+                            if (ts.isExpression(node)) {
+                                switch (node.parent.kind) {
+                                    case 204 /* DoStatement */:
+                                        // Set span as if on while keyword
+                                        return spanInPreviousNode(node);
+                                    case 143 /* Decorator */:
+                                        // Set breakpoint on the decorator emit
+                                        return spanInNode(node.parent);
+                                    case 206 /* ForStatement */:
+                                    case 208 /* ForOfStatement */:
+                                        return textSpan(node);
+                                    case 187 /* BinaryExpression */:
+                                        if (node.parent.operatorToken.kind === 24 /* CommaToken */) {
+                                            // If this is a comma expression, the breakpoint is possible in this expression
+                                            return textSpan(node);
+                                        }
+                                        break;
+                                    case 180 /* ArrowFunction */:
+                                        if (node.parent.body === node) {
+                                            // If this is body of arrow function, it is allowed to have the breakpoint
+                                            return textSpan(node);
+                                        }
+                                        break;
+                                }
+                            }
+                            // If this is name of property assignment, set breakpoint in the initializer
+                            if (node.parent.kind === 253 /* PropertyAssignment */ &&
+                                node.parent.name === node &&
+                                !ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.parent)) {
+                                return spanInNode(node.parent.initializer);
+                            }
+                            // Breakpoint in type assertion goes to its operand
+                            if (node.parent.kind === 177 /* TypeAssertionExpression */ && node.parent.type === node) {
+                                return spanInNextNode(node.parent.type);
+                            }
+                            // return type of function go to previous token
+                            if (ts.isFunctionLike(node.parent) && node.parent.type === node) {
+                                return spanInPreviousNode(node);
+                            }
+                            // initializer of variable/parameter declaration go to previous node
+                            if ((node.parent.kind === 218 /* VariableDeclaration */ ||
+                                node.parent.kind === 142 /* Parameter */)) {
+                                var paramOrVarDecl = node.parent;
+                                if (paramOrVarDecl.initializer === node ||
+                                    paramOrVarDecl.type === node ||
+                                    ts.isAssignmentOperator(node.kind)) {
+                                    return spanInPreviousNode(node);
+                                }
+                            }
+                            if (node.parent.kind === 187 /* BinaryExpression */) {
+                                var binaryExpression = node.parent;
+                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left) &&
+                                    (binaryExpression.right === node ||
+                                        binaryExpression.operatorToken === node)) {
+                                    // If initializer of destructuring assignment move to previous token
+                                    return spanInPreviousNode(node);
+                                }
+                            }
+                            // Default go to parent to set the breakpoint
+                            return spanInNode(node.parent);
+                    }
+                }
+                function textSpanFromVariableDeclaration(variableDeclaration) {
+                    var declarations = variableDeclaration.parent.declarations;
+                    if (declarations && declarations[0] === variableDeclaration) {
+                        // First declaration - include let keyword
+                        return textSpan(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent), variableDeclaration);
+                    }
+                    else {
+                        // Span only on this declaration
+                        return textSpan(variableDeclaration);
+                    }
+                }
+                function spanInVariableDeclaration(variableDeclaration) {
+                    // If declaration of for in statement, just set the span in parent
+                    if (variableDeclaration.parent.parent.kind === 207 /* ForInStatement */) {
+                        return spanInNode(variableDeclaration.parent.parent);
+                    }
+                    // If this is a destructuring pattern, set breakpoint in binding pattern
+                    if (ts.isBindingPattern(variableDeclaration.name)) {
+                        return spanInBindingPattern(variableDeclaration.name);
+                    }
+                    // Breakpoint is possible in variableDeclaration only if there is initialization
+                    // or its declaration from 'for of'
+                    if (variableDeclaration.initializer ||
+                        (variableDeclaration.flags & 1 /* Export */) ||
+                        variableDeclaration.parent.parent.kind === 208 /* ForOfStatement */) {
+                        return textSpanFromVariableDeclaration(variableDeclaration);
+                    }
+                    var declarations = variableDeclaration.parent.declarations;
+                    if (declarations && declarations[0] !== variableDeclaration) {
+                        // If we cannot set breakpoint on this declaration, set it on previous one
+                        // Because the variable declaration may be binding pattern and
+                        // we would like to set breakpoint in last binding element if that's the case,
+                        // use preceding token instead
+                        return spanInNode(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent));
+                    }
+                }
+                function canHaveSpanInParameterDeclaration(parameter) {
+                    // Breakpoint is possible on parameter only if it has initializer, is a rest parameter, or has public or private modifier
+                    return !!parameter.initializer || parameter.dotDotDotToken !== undefined ||
+                        !!(parameter.flags & 4 /* Public */) || !!(parameter.flags & 8 /* Private */);
+                }
+                function spanInParameterDeclaration(parameter) {
+                    if (ts.isBindingPattern(parameter.name)) {
+                        // Set breakpoint in binding pattern
+                        return spanInBindingPattern(parameter.name);
+                    }
+                    else if (canHaveSpanInParameterDeclaration(parameter)) {
+                        return textSpan(parameter);
+                    }
+                    else {
+                        var functionDeclaration = parameter.parent;
+                        var indexOfParameter = ts.indexOf(functionDeclaration.parameters, parameter);
+                        if (indexOfParameter) {
+                            // Not a first parameter, go to previous parameter
+                            return spanInParameterDeclaration(functionDeclaration.parameters[indexOfParameter - 1]);
+                        }
+                        else {
+                            // Set breakpoint in the function declaration body
+                            return spanInNode(functionDeclaration.body);
+                        }
+                    }
+                }
+                function canFunctionHaveSpanInWholeDeclaration(functionDeclaration) {
+                    return !!(functionDeclaration.flags & 1 /* Export */) ||
+                        (functionDeclaration.parent.kind === 221 /* ClassDeclaration */ && functionDeclaration.kind !== 148 /* Constructor */);
+                }
+                function spanInFunctionDeclaration(functionDeclaration) {
+                    // No breakpoints in the function signature
+                    if (!functionDeclaration.body) {
+                        return undefined;
+                    }
+                    if (canFunctionHaveSpanInWholeDeclaration(functionDeclaration)) {
+                        // Set the span on whole function declaration
+                        return textSpan(functionDeclaration);
+                    }
+                    // Set span in function body
+                    return spanInNode(functionDeclaration.body);
+                }
+                function spanInFunctionBlock(block) {
+                    var nodeForSpanInBlock = block.statements.length ? block.statements[0] : block.getLastToken();
+                    if (canFunctionHaveSpanInWholeDeclaration(block.parent)) {
+                        return spanInNodeIfStartsOnSameLine(block.parent, nodeForSpanInBlock);
+                    }
+                    return spanInNode(nodeForSpanInBlock);
+                }
+                function spanInBlock(block) {
+                    switch (block.parent.kind) {
+                        case 225 /* ModuleDeclaration */:
+                            if (ts.getModuleInstanceState(block.parent) !== 1 /* Instantiated */) {
+                                return undefined;
+                            }
+                        // Set on parent if on same line otherwise on first statement
+                        case 205 /* WhileStatement */:
+                        case 203 /* IfStatement */:
+                        case 207 /* ForInStatement */:
+                            return spanInNodeIfStartsOnSameLine(block.parent, block.statements[0]);
+                        // Set span on previous token if it starts on same line otherwise on the first statement of the block
+                        case 206 /* ForStatement */:
+                        case 208 /* ForOfStatement */:
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(block.pos, sourceFile, block.parent), block.statements[0]);
+                    }
+                    // Default action is to set on first statement
+                    return spanInNode(block.statements[0]);
+                }
+                function spanInInitializerOfForLike(forLikeStatement) {
+                    if (forLikeStatement.initializer.kind === 219 /* VariableDeclarationList */) {
+                        // Declaration list - set breakpoint in first declaration
+                        var variableDeclarationList = forLikeStatement.initializer;
+                        if (variableDeclarationList.declarations.length > 0) {
+                            return spanInNode(variableDeclarationList.declarations[0]);
+                        }
+                    }
+                    else {
+                        // Expression - set breakpoint in it
+                        return spanInNode(forLikeStatement.initializer);
+                    }
+                }
+                function spanInForStatement(forStatement) {
+                    if (forStatement.initializer) {
+                        return spanInInitializerOfForLike(forStatement);
+                    }
+                    if (forStatement.condition) {
+                        return textSpan(forStatement.condition);
+                    }
+                    if (forStatement.incrementor) {
+                        return textSpan(forStatement.incrementor);
+                    }
+                }
+                function spanInBindingPattern(bindingPattern) {
+                    // Set breakpoint in first binding element
+                    var firstBindingElement = ts.forEach(bindingPattern.elements, function (element) { return element.kind !== 193 /* OmittedExpression */ ? element : undefined; });
+                    if (firstBindingElement) {
+                        return spanInNode(firstBindingElement);
+                    }
+                    // Empty binding pattern of binding element, set breakpoint on binding element
+                    if (bindingPattern.parent.kind === 169 /* BindingElement */) {
+                        return textSpan(bindingPattern.parent);
+                    }
+                    // Variable declaration is used as the span
+                    return textSpanFromVariableDeclaration(bindingPattern.parent);
+                }
+                function spanInArrayLiteralOrObjectLiteralDestructuringPattern(node) {
+                    ts.Debug.assert(node.kind !== 168 /* ArrayBindingPattern */ && node.kind !== 167 /* ObjectBindingPattern */);
+                    var elements = node.kind === 170 /* ArrayLiteralExpression */ ?
+                        node.elements :
+                        node.properties;
+                    var firstBindingElement = ts.forEach(elements, function (element) { return element.kind !== 193 /* OmittedExpression */ ? element : undefined; });
+                    if (firstBindingElement) {
+                        return spanInNode(firstBindingElement);
+                    }
+                    // Could be ArrayLiteral from destructuring assignment or
+                    // just nested element in another destructuring assignment
+                    // set breakpoint on assignment when parent is destructuring assignment
+                    // Otherwise set breakpoint for this element
+                    return textSpan(node.parent.kind === 187 /* BinaryExpression */ ? node.parent : node);
+                }
+                // Tokens:
+                function spanInOpenBraceToken(node) {
+                    switch (node.parent.kind) {
+                        case 224 /* EnumDeclaration */:
+                            var enumDeclaration = node.parent;
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), enumDeclaration.members.length ? enumDeclaration.members[0] : enumDeclaration.getLastToken(sourceFile));
+                        case 221 /* ClassDeclaration */:
+                            var classDeclaration = node.parent;
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), classDeclaration.members.length ? classDeclaration.members[0] : classDeclaration.getLastToken(sourceFile));
+                        case 227 /* CaseBlock */:
+                            return spanInNodeIfStartsOnSameLine(node.parent.parent, node.parent.clauses[0]);
+                    }
+                    // Default to parent node
+                    return spanInNode(node.parent);
+                }
+                function spanInCloseBraceToken(node) {
+                    switch (node.parent.kind) {
+                        case 226 /* ModuleBlock */:
+                            // If this is not an instantiated module block, no bp span
+                            if (ts.getModuleInstanceState(node.parent.parent) !== 1 /* Instantiated */) {
+                                return undefined;
+                            }
+                        case 224 /* EnumDeclaration */:
+                        case 221 /* ClassDeclaration */:
+                            // Span on close brace token
+                            return textSpan(node);
+                        case 199 /* Block */:
+                            if (ts.isFunctionBlock(node.parent)) {
+                                // Span on close brace token
+                                return textSpan(node);
+                            }
+                        // fall through
+                        case 252 /* CatchClause */:
+                            return spanInNode(ts.lastOrUndefined(node.parent.statements));
+                        case 227 /* CaseBlock */:
+                            // breakpoint in last statement of the last clause
+                            var caseBlock = node.parent;
+                            var lastClause = ts.lastOrUndefined(caseBlock.clauses);
+                            if (lastClause) {
+                                return spanInNode(ts.lastOrUndefined(lastClause.statements));
+                            }
+                            return undefined;
+                        case 167 /* ObjectBindingPattern */:
+                            // Breakpoint in last binding element or binding pattern if it contains no elements
+                            var bindingPattern = node.parent;
+                            return spanInNode(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
+                        // Default to parent node
+                        default:
+                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
+                                // Breakpoint in last binding element or binding pattern if it contains no elements
+                                var objectLiteral = node.parent;
+                                return textSpan(ts.lastOrUndefined(objectLiteral.properties) || objectLiteral);
+                            }
+                            return spanInNode(node.parent);
+                    }
+                }
+                function spanInCloseBracketToken(node) {
+                    switch (node.parent.kind) {
+                        case 168 /* ArrayBindingPattern */:
+                            // Breakpoint in last binding element or binding pattern if it contains no elements
+                            var bindingPattern = node.parent;
+                            return textSpan(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
+                        default:
+                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
+                                // Breakpoint in last binding element or binding pattern if it contains no elements
+                                var arrayLiteral = node.parent;
+                                return textSpan(ts.lastOrUndefined(arrayLiteral.elements) || arrayLiteral);
+                            }
+                            // Default to parent node
+                            return spanInNode(node.parent);
+                    }
+                }
+                function spanInOpenParenToken(node) {
+                    if (node.parent.kind === 204 /* DoStatement */ ||
+                        node.parent.kind === 174 /* CallExpression */ ||
+                        node.parent.kind === 175 /* NewExpression */) {
+                        return spanInPreviousNode(node);
+                    }
+                    if (node.parent.kind === 178 /* ParenthesizedExpression */) {
+                        return spanInNextNode(node);
+                    }
+                    // Default to parent node
+                    return spanInNode(node.parent);
+                }
+                function spanInCloseParenToken(node) {
+                    // Is this close paren token of parameter list, set span in previous token
+                    switch (node.parent.kind) {
+                        case 179 /* FunctionExpression */:
+                        case 220 /* FunctionDeclaration */:
+                        case 180 /* ArrowFunction */:
+                        case 147 /* MethodDeclaration */:
+                        case 146 /* MethodSignature */:
+                        case 149 /* GetAccessor */:
+                        case 150 /* SetAccessor */:
+                        case 148 /* Constructor */:
+                        case 205 /* WhileStatement */:
+                        case 204 /* DoStatement */:
+                        case 206 /* ForStatement */:
+                        case 208 /* ForOfStatement */:
+                        case 174 /* CallExpression */:
+                        case 175 /* NewExpression */:
+                        case 178 /* ParenthesizedExpression */:
+                            return spanInPreviousNode(node);
+                        // Default to parent node
+                        default:
+                            return spanInNode(node.parent);
+                    }
+                }
+                function spanInColonToken(node) {
+                    // Is this : specifying return annotation of the function declaration
+                    if (ts.isFunctionLike(node.parent) ||
+                        node.parent.kind === 253 /* PropertyAssignment */ ||
+                        node.parent.kind === 142 /* Parameter */) {
+                        return spanInPreviousNode(node);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInGreaterThanOrLessThanToken(node) {
+                    if (node.parent.kind === 177 /* TypeAssertionExpression */) {
+                        return spanInNextNode(node);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInWhileKeyword(node) {
+                    if (node.parent.kind === 204 /* DoStatement */) {
+                        // Set span on while expression
+                        return textSpanEndingAtNextToken(node, node.parent.expression);
+                    }
+                    // Default to parent node
+                    return spanInNode(node.parent);
+                }
+                function spanInOfKeyword(node) {
+                    if (node.parent.kind === 208 /* ForOfStatement */) {
+                        // Set using next token
+                        return spanInNextNode(node);
+                    }
+                    // Default to parent node
+                    return spanInNode(node.parent);
+                }
+            }
+        }
+        BreakpointResolver.spanInSourceFileAtLocation = spanInSourceFileAtLocation;
+    })(BreakpointResolver = ts.BreakpointResolver || (ts.BreakpointResolver = {}));
+})(ts || (ts = {}));
+//
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+/// <reference path='services.ts' />
+/* @internal */
+var debugObjectHost = this;
+// We need to use 'null' to interface with the managed side.
+/* tslint:disable:no-null-keyword */
+/* tslint:disable:no-in-operator */
+/* @internal */
+var ts;
+(function (ts) {
+    function logInternalError(logger, err) {
+        if (logger) {
+            logger.log("*INTERNAL ERROR* - Exception in typescript services: " + err.message);
+        }
+    }
+    var ScriptSnapshotShimAdapter = (function () {
+        function ScriptSnapshotShimAdapter(scriptSnapshotShim) {
+            this.scriptSnapshotShim = scriptSnapshotShim;
+        }
+        ScriptSnapshotShimAdapter.prototype.getText = function (start, end) {
+            return this.scriptSnapshotShim.getText(start, end);
+        };
+        ScriptSnapshotShimAdapter.prototype.getLength = function () {
+            return this.scriptSnapshotShim.getLength();
+        };
+        ScriptSnapshotShimAdapter.prototype.getChangeRange = function (oldSnapshot) {
+            var oldSnapshotShim = oldSnapshot;
+            var encoded = this.scriptSnapshotShim.getChangeRange(oldSnapshotShim.scriptSnapshotShim);
+            // TODO: should this be '==='?
+            if (encoded == null) {
+                return null;
+            }
+            var decoded = JSON.parse(encoded);
+            return ts.createTextChangeRange(ts.createTextSpan(decoded.span.start, decoded.span.length), decoded.newLength);
+        };
+        ScriptSnapshotShimAdapter.prototype.dispose = function () {
+            // if scriptSnapshotShim is a COM object then property check becomes method call with no arguments
+            // 'in' does not have this effect
+            if ("dispose" in this.scriptSnapshotShim) {
+                this.scriptSnapshotShim.dispose();
+            }
+        };
+        return ScriptSnapshotShimAdapter;
+    }());
+    var LanguageServiceShimHostAdapter = (function () {
+        function LanguageServiceShimHostAdapter(shimHost) {
+            var _this = this;
+            this.shimHost = shimHost;
+            this.loggingEnabled = false;
+            this.tracingEnabled = false;
+            // if shimHost is a COM object then property check will become method call with no arguments.
+            // 'in' does not have this effect.
+            if ("getModuleResolutionsForFile" in this.shimHost) {
+                this.resolveModuleNames = function (moduleNames, containingFile) {
+                    var resolutionsInFile = JSON.parse(_this.shimHost.getModuleResolutionsForFile(containingFile));
+                    return ts.map(moduleNames, function (name) {
+                        var result = ts.lookUp(resolutionsInFile, name);
+                        return result ? { resolvedFileName: result } : undefined;
+                    });
+                };
+            }
+            if ("directoryExists" in this.shimHost) {
+                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
+            }
+            if ("getTypeReferenceDirectiveResolutionsForFile" in this.shimHost) {
+                this.resolveTypeReferenceDirectives = function (typeDirectiveNames, containingFile) {
+                    var typeDirectivesForFile = JSON.parse(_this.shimHost.getTypeReferenceDirectiveResolutionsForFile(containingFile));
+                    return ts.map(typeDirectiveNames, function (name) { return ts.lookUp(typeDirectivesForFile, name); });
+                };
+            }
+        }
+        LanguageServiceShimHostAdapter.prototype.log = function (s) {
+            if (this.loggingEnabled) {
+                this.shimHost.log(s);
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.trace = function (s) {
+            if (this.tracingEnabled) {
+                this.shimHost.trace(s);
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.error = function (s) {
+            this.shimHost.error(s);
+        };
+        LanguageServiceShimHostAdapter.prototype.getProjectVersion = function () {
+            if (!this.shimHost.getProjectVersion) {
+                // shimmed host does not support getProjectVersion
+                return undefined;
+            }
+            return this.shimHost.getProjectVersion();
+        };
+        LanguageServiceShimHostAdapter.prototype.useCaseSensitiveFileNames = function () {
+            return this.shimHost.useCaseSensitiveFileNames ? this.shimHost.useCaseSensitiveFileNames() : false;
+        };
+        LanguageServiceShimHostAdapter.prototype.getCompilationSettings = function () {
+            var settingsJson = this.shimHost.getCompilationSettings();
+            // TODO: should this be '==='?
+            if (settingsJson == null || settingsJson == "") {
+                throw Error("LanguageServiceShimHostAdapter.getCompilationSettings: empty compilationSettings");
+            }
+            return JSON.parse(settingsJson);
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptFileNames = function () {
+            var encoded = this.shimHost.getScriptFileNames();
+            return this.files = JSON.parse(encoded);
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptSnapshot = function (fileName) {
+            var scriptSnapshot = this.shimHost.getScriptSnapshot(fileName);
+            return scriptSnapshot && new ScriptSnapshotShimAdapter(scriptSnapshot);
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptKind = function (fileName) {
+            if ("getScriptKind" in this.shimHost) {
+                return this.shimHost.getScriptKind(fileName);
+            }
+            else {
+                return 0 /* Unknown */;
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptVersion = function (fileName) {
+            return this.shimHost.getScriptVersion(fileName);
+        };
+        LanguageServiceShimHostAdapter.prototype.getLocalizedDiagnosticMessages = function () {
+            var diagnosticMessagesJson = this.shimHost.getLocalizedDiagnosticMessages();
+            if (diagnosticMessagesJson == null || diagnosticMessagesJson == "") {
+                return null;
+            }
+            try {
+                return JSON.parse(diagnosticMessagesJson);
+            }
+            catch (e) {
+                this.log(e.description || "diagnosticMessages.generated.json has invalid JSON format");
+                return null;
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.getCancellationToken = function () {
+            var hostCancellationToken = this.shimHost.getCancellationToken();
+            return new ThrottledCancellationToken(hostCancellationToken);
+        };
+        LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
+            return this.shimHost.getCurrentDirectory();
+        };
+        LanguageServiceShimHostAdapter.prototype.getDirectories = function (path) {
+            return this.shimHost.getDirectories(path);
+        };
+        LanguageServiceShimHostAdapter.prototype.getDefaultLibFileName = function (options) {
+            return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
+        };
+        return LanguageServiceShimHostAdapter;
+    }());
+    ts.LanguageServiceShimHostAdapter = LanguageServiceShimHostAdapter;
+    /** A cancellation that throttles calls to the host */
+    var ThrottledCancellationToken = (function () {
+        function ThrottledCancellationToken(hostCancellationToken) {
+            this.hostCancellationToken = hostCancellationToken;
+            // Store when we last tried to cancel.  Checking cancellation can be expensive (as we have
+            // to marshall over to the host layer).  So we only bother actually checking once enough
+            // time has passed.
+            this.lastCancellationCheckTime = 0;
+        }
+        ThrottledCancellationToken.prototype.isCancellationRequested = function () {
+            var time = Date.now();
+            var duration = Math.abs(time - this.lastCancellationCheckTime);
+            if (duration > 10) {
+                // Check no more than once every 10 ms.
+                this.lastCancellationCheckTime = time;
+                return this.hostCancellationToken.isCancellationRequested();
+            }
+            return false;
+        };
+        return ThrottledCancellationToken;
+    }());
+    var CoreServicesShimHostAdapter = (function () {
+        function CoreServicesShimHostAdapter(shimHost) {
+            var _this = this;
+            this.shimHost = shimHost;
+            if ("directoryExists" in this.shimHost) {
+                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
+            }
+            if ("realpath" in this.shimHost) {
+                this.realpath = function (path) { return _this.shimHost.realpath(path); };
+            }
+        }
+        CoreServicesShimHostAdapter.prototype.readDirectory = function (rootDir, extension, exclude, depth) {
+            // Wrap the API changes for 2.0 release. This try/catch
+            // should be removed once TypeScript 2.0 has shipped.
+            var encoded;
+            try {
+                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude), depth);
+            }
+            catch (e) {
+                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude));
+            }
+            return JSON.parse(encoded);
+        };
+        CoreServicesShimHostAdapter.prototype.fileExists = function (fileName) {
+            return this.shimHost.fileExists(fileName);
+        };
+        CoreServicesShimHostAdapter.prototype.readFile = function (fileName) {
+            return this.shimHost.readFile(fileName);
+        };
+        return CoreServicesShimHostAdapter;
+    }());
+    ts.CoreServicesShimHostAdapter = CoreServicesShimHostAdapter;
+    function simpleForwardCall(logger, actionDescription, action, logPerformance) {
+        var start;
+        if (logPerformance) {
+            logger.log(actionDescription);
+            start = Date.now();
+        }
+        var result = action();
+        if (logPerformance) {
+            var end = Date.now();
+            logger.log(actionDescription + " completed in " + (end - start) + " msec");
+            if (typeof result === "string") {
+                var str = result;
+                if (str.length > 128) {
+                    str = str.substring(0, 128) + "...";
+                }
+                logger.log("  result.length=" + str.length + ", result='" + JSON.stringify(str) + "'");
+            }
+        }
+        return result;
+    }
+    function forwardJSONCall(logger, actionDescription, action, logPerformance) {
+        try {
+            var result = simpleForwardCall(logger, actionDescription, action, logPerformance);
+            return JSON.stringify({ result: result });
+        }
+        catch (err) {
+            if (err instanceof ts.OperationCanceledException) {
+                return JSON.stringify({ canceled: true });
+            }
+            logInternalError(logger, err);
+            err.description = actionDescription;
+            return JSON.stringify({ error: err });
+        }
+    }
+    var ShimBase = (function () {
+        function ShimBase(factory) {
+            this.factory = factory;
+            factory.registerShim(this);
+        }
+        ShimBase.prototype.dispose = function (dummy) {
+            this.factory.unregisterShim(this);
+        };
+        return ShimBase;
+    }());
+    function realizeDiagnostics(diagnostics, newLine) {
+        return diagnostics.map(function (d) { return realizeDiagnostic(d, newLine); });
+    }
+    ts.realizeDiagnostics = realizeDiagnostics;
+    function realizeDiagnostic(diagnostic, newLine) {
+        return {
+            message: ts.flattenDiagnosticMessageText(diagnostic.messageText, newLine),
+            start: diagnostic.start,
+            length: diagnostic.length,
+            /// TODO: no need for the tolowerCase call
+            category: ts.DiagnosticCategory[diagnostic.category].toLowerCase(),
+            code: diagnostic.code
+        };
+    }
+    var LanguageServiceShimObject = (function (_super) {
+        __extends(LanguageServiceShimObject, _super);
+        function LanguageServiceShimObject(factory, host, languageService) {
+            _super.call(this, factory);
+            this.host = host;
+            this.languageService = languageService;
+            this.logPerformance = false;
+            this.logger = this.host;
+        }
+        LanguageServiceShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
+            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
+        };
+        /// DISPOSE
+        /**
+         * Ensure (almost) deterministic release of internal Javascript resources when
+         * some external native objects holds onto us (e.g. Com/Interop).
+         */
+        LanguageServiceShimObject.prototype.dispose = function (dummy) {
+            this.logger.log("dispose()");
+            this.languageService.dispose();
+            this.languageService = null;
+            // force a GC
+            if (debugObjectHost && debugObjectHost.CollectGarbage) {
+                debugObjectHost.CollectGarbage();
+                this.logger.log("CollectGarbage()");
+            }
+            this.logger = null;
+            _super.prototype.dispose.call(this, dummy);
+        };
+        /// REFRESH
+        /**
+         * Update the list of scripts known to the compiler
+         */
+        LanguageServiceShimObject.prototype.refresh = function (throwOnError) {
+            this.forwardJSONCall("refresh(" + throwOnError + ")", function () { return null; });
+        };
+        LanguageServiceShimObject.prototype.cleanupSemanticCache = function () {
+            var _this = this;
+            this.forwardJSONCall("cleanupSemanticCache()", function () {
+                _this.languageService.cleanupSemanticCache();
+                return null;
+            });
+        };
+        LanguageServiceShimObject.prototype.realizeDiagnostics = function (diagnostics) {
+            var newLine = ts.getNewLineOrDefaultFromHost(this.host);
+            return ts.realizeDiagnostics(diagnostics, newLine);
+        };
+        LanguageServiceShimObject.prototype.getSyntacticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSyntacticClassifications(fileName, ts.createTextSpan(start, length)); });
+        };
+        LanguageServiceShimObject.prototype.getSemanticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSemanticClassifications(fileName, ts.createTextSpan(start, length)); });
+        };
+        LanguageServiceShimObject.prototype.getEncodedSyntacticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getEncodedSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", 
+            // directly serialize the spans out to a string.  This is much faster to decode
+            // on the managed side versus a full JSON array.
+            function () { return convertClassifications(_this.languageService.getEncodedSyntacticClassifications(fileName, ts.createTextSpan(start, length))); });
+        };
+        LanguageServiceShimObject.prototype.getEncodedSemanticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getEncodedSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", 
+            // directly serialize the spans out to a string.  This is much faster to decode
+            // on the managed side versus a full JSON array.
+            function () { return convertClassifications(_this.languageService.getEncodedSemanticClassifications(fileName, ts.createTextSpan(start, length))); });
+        };
+        LanguageServiceShimObject.prototype.getSyntacticDiagnostics = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getSyntacticDiagnostics('" + fileName + "')", function () {
+                var diagnostics = _this.languageService.getSyntacticDiagnostics(fileName);
+                return _this.realizeDiagnostics(diagnostics);
+            });
+        };
+        LanguageServiceShimObject.prototype.getSemanticDiagnostics = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getSemanticDiagnostics('" + fileName + "')", function () {
+                var diagnostics = _this.languageService.getSemanticDiagnostics(fileName);
+                return _this.realizeDiagnostics(diagnostics);
+            });
+        };
+        LanguageServiceShimObject.prototype.getCompilerOptionsDiagnostics = function () {
+            var _this = this;
+            return this.forwardJSONCall("getCompilerOptionsDiagnostics()", function () {
+                var diagnostics = _this.languageService.getCompilerOptionsDiagnostics();
+                return _this.realizeDiagnostics(diagnostics);
+            });
+        };
+        /// QUICKINFO
+        /**
+         * Computes a string representation of the type at the requested position
+         * in the active file.
+         */
+        LanguageServiceShimObject.prototype.getQuickInfoAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getQuickInfoAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getQuickInfoAtPosition(fileName, position); });
+        };
+        /// NAMEORDOTTEDNAMESPAN
+        /**
+         * Computes span information of the name or dotted name at the requested position
+         * in the active file.
+         */
+        LanguageServiceShimObject.prototype.getNameOrDottedNameSpan = function (fileName, startPos, endPos) {
+            var _this = this;
+            return this.forwardJSONCall("getNameOrDottedNameSpan('" + fileName + "', " + startPos + ", " + endPos + ")", function () { return _this.languageService.getNameOrDottedNameSpan(fileName, startPos, endPos); });
+        };
+        /**
+         * STATEMENTSPAN
+         * Computes span information of statement at the requested position in the active file.
+         */
+        LanguageServiceShimObject.prototype.getBreakpointStatementAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getBreakpointStatementAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBreakpointStatementAtPosition(fileName, position); });
+        };
+        /// SIGNATUREHELP
+        LanguageServiceShimObject.prototype.getSignatureHelpItems = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getSignatureHelpItems('" + fileName + "', " + position + ")", function () { return _this.languageService.getSignatureHelpItems(fileName, position); });
+        };
+        /// GOTO DEFINITION
+        /**
+         * Computes the definition location and file for the symbol
+         * at the requested position.
+         */
+        LanguageServiceShimObject.prototype.getDefinitionAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDefinitionAtPosition(fileName, position); });
+        };
+        /// GOTO Type
+        /**
+         * Computes the definition location of the type of the symbol
+         * at the requested position.
+         */
+        LanguageServiceShimObject.prototype.getTypeDefinitionAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getTypeDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getTypeDefinitionAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getRenameInfo = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getRenameInfo('" + fileName + "', " + position + ")", function () { return _this.languageService.getRenameInfo(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.findRenameLocations = function (fileName, position, findInStrings, findInComments) {
+            var _this = this;
+            return this.forwardJSONCall("findRenameLocations('" + fileName + "', " + position + ", " + findInStrings + ", " + findInComments + ")", function () { return _this.languageService.findRenameLocations(fileName, position, findInStrings, findInComments); });
+        };
+        /// GET BRACE MATCHING
+        LanguageServiceShimObject.prototype.getBraceMatchingAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getBraceMatchingAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBraceMatchingAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.isValidBraceCompletionAtPostion = function (fileName, position, openingBrace) {
+            var _this = this;
+            return this.forwardJSONCall("isValidBraceCompletionAtPostion('" + fileName + "', " + position + ", " + openingBrace + ")", function () { return _this.languageService.isValidBraceCompletionAtPostion(fileName, position, openingBrace); });
+        };
+        /// GET SMART INDENT
+        LanguageServiceShimObject.prototype.getIndentationAtPosition = function (fileName, position, options /*Services.EditorOptions*/) {
+            var _this = this;
+            return this.forwardJSONCall("getIndentationAtPosition('" + fileName + "', " + position + ")", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getIndentationAtPosition(fileName, position, localOptions);
+            });
+        };
+        /// GET REFERENCES
+        LanguageServiceShimObject.prototype.getReferencesAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getReferencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getReferencesAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.findReferences = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("findReferences('" + fileName + "', " + position + ")", function () { return _this.languageService.findReferences(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getOccurrencesAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getOccurrencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getOccurrencesAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getDocumentHighlights = function (fileName, position, filesToSearch) {
+            var _this = this;
+            return this.forwardJSONCall("getDocumentHighlights('" + fileName + "', " + position + ")", function () {
+                var results = _this.languageService.getDocumentHighlights(fileName, position, JSON.parse(filesToSearch));
+                // workaround for VS document highlighting issue - keep only items from the initial file
+                var normalizedName = ts.normalizeSlashes(fileName).toLowerCase();
+                return ts.filter(results, function (r) { return ts.normalizeSlashes(r.fileName).toLowerCase() === normalizedName; });
+            });
+        };
+        /// COMPLETION LISTS
+        /**
+         * Get a string based representation of the completions
+         * to provide at the given source position and providing a member completion
+         * list if requested.
+         */
+        LanguageServiceShimObject.prototype.getCompletionsAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getCompletionsAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getCompletionsAtPosition(fileName, position); });
+        };
+        /** Get a string based representation of a completion list entry details */
+        LanguageServiceShimObject.prototype.getCompletionEntryDetails = function (fileName, position, entryName) {
+            var _this = this;
+            return this.forwardJSONCall("getCompletionEntryDetails('" + fileName + "', " + position + ", '" + entryName + "')", function () { return _this.languageService.getCompletionEntryDetails(fileName, position, entryName); });
+        };
+        LanguageServiceShimObject.prototype.getFormattingEditsForRange = function (fileName, start, end, options /*Services.FormatCodeOptions*/) {
+            var _this = this;
+            return this.forwardJSONCall("getFormattingEditsForRange('" + fileName + "', " + start + ", " + end + ")", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getFormattingEditsForRange(fileName, start, end, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getFormattingEditsForDocument = function (fileName, options /*Services.FormatCodeOptions*/) {
+            var _this = this;
+            return this.forwardJSONCall("getFormattingEditsForDocument('" + fileName + "')", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getFormattingEditsForDocument(fileName, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getFormattingEditsAfterKeystroke = function (fileName, position, key, options /*Services.FormatCodeOptions*/) {
+            var _this = this;
+            return this.forwardJSONCall("getFormattingEditsAfterKeystroke('" + fileName + "', " + position + ", '" + key + "')", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getFormattingEditsAfterKeystroke(fileName, position, key, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getDocCommentTemplateAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getDocCommentTemplateAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDocCommentTemplateAtPosition(fileName, position); });
+        };
+        /// NAVIGATE TO
+        /** Return a list of symbols that are interesting to navigate to */
+        LanguageServiceShimObject.prototype.getNavigateToItems = function (searchValue, maxResultCount) {
+            var _this = this;
+            return this.forwardJSONCall("getNavigateToItems('" + searchValue + "', " + maxResultCount + ")", function () { return _this.languageService.getNavigateToItems(searchValue, maxResultCount); });
+        };
+        LanguageServiceShimObject.prototype.getNavigationBarItems = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getNavigationBarItems('" + fileName + "')", function () { return _this.languageService.getNavigationBarItems(fileName); });
+        };
+        LanguageServiceShimObject.prototype.getOutliningSpans = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getOutliningSpans('" + fileName + "')", function () { return _this.languageService.getOutliningSpans(fileName); });
+        };
+        LanguageServiceShimObject.prototype.getTodoComments = function (fileName, descriptors) {
+            var _this = this;
+            return this.forwardJSONCall("getTodoComments('" + fileName + "')", function () { return _this.languageService.getTodoComments(fileName, JSON.parse(descriptors)); });
+        };
+        /// Emit
+        LanguageServiceShimObject.prototype.getEmitOutput = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getEmitOutput('" + fileName + "')", function () { return _this.languageService.getEmitOutput(fileName); });
+        };
+        return LanguageServiceShimObject;
+    }(ShimBase));
+    function convertClassifications(classifications) {
+        return { spans: classifications.spans.join(","), endOfLineState: classifications.endOfLineState };
+    }
+    var ClassifierShimObject = (function (_super) {
+        __extends(ClassifierShimObject, _super);
+        function ClassifierShimObject(factory, logger) {
+            _super.call(this, factory);
+            this.logger = logger;
+            this.logPerformance = false;
+            this.classifier = ts.createClassifier();
+        }
+        ClassifierShimObject.prototype.getEncodedLexicalClassifications = function (text, lexState, syntacticClassifierAbsent) {
+            var _this = this;
+            return forwardJSONCall(this.logger, "getEncodedLexicalClassifications", function () { return convertClassifications(_this.classifier.getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent)); }, this.logPerformance);
+        };
+        /// COLORIZATION
+        ClassifierShimObject.prototype.getClassificationsForLine = function (text, lexState, classifyKeywordsInGenerics) {
+            var classification = this.classifier.getClassificationsForLine(text, lexState, classifyKeywordsInGenerics);
+            var result = "";
+            for (var _i = 0, _a = classification.entries; _i < _a.length; _i++) {
+                var item = _a[_i];
+                result += item.length + "\n";
+                result += item.classification + "\n";
+            }
+            result += classification.finalLexState;
+            return result;
+        };
+        return ClassifierShimObject;
+    }(ShimBase));
+    var CoreServicesShimObject = (function (_super) {
+        __extends(CoreServicesShimObject, _super);
+        function CoreServicesShimObject(factory, logger, host) {
+            _super.call(this, factory);
+            this.logger = logger;
+            this.host = host;
+            this.logPerformance = false;
+        }
+        CoreServicesShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
+            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
+        };
+        CoreServicesShimObject.prototype.resolveModuleName = function (fileName, moduleName, compilerOptionsJson) {
+            var _this = this;
+            return this.forwardJSONCall("resolveModuleName('" + fileName + "')", function () {
+                var compilerOptions = JSON.parse(compilerOptionsJson);
+                var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
+                return {
+                    resolvedFileName: result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined,
+                    failedLookupLocations: result.failedLookupLocations
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.resolveTypeReferenceDirective = function (fileName, typeReferenceDirective, compilerOptionsJson) {
+            var _this = this;
+            return this.forwardJSONCall("resolveTypeReferenceDirective(" + fileName + ")", function () {
+                var compilerOptions = JSON.parse(compilerOptionsJson);
+                var result = ts.resolveTypeReferenceDirective(typeReferenceDirective, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
+                return {
+                    resolvedFileName: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.resolvedFileName : undefined,
+                    primary: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.primary : true,
+                    failedLookupLocations: result.failedLookupLocations
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.getPreProcessedFileInfo = function (fileName, sourceTextSnapshot) {
+            var _this = this;
+            return this.forwardJSONCall("getPreProcessedFileInfo('" + fileName + "')", function () {
+                // for now treat files as JavaScript
+                var result = ts.preProcessFile(sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength()), /* readImportFiles */ true, /* detectJavaScriptImports */ true);
+                return {
+                    referencedFiles: _this.convertFileReferences(result.referencedFiles),
+                    importedFiles: _this.convertFileReferences(result.importedFiles),
+                    ambientExternalModules: result.ambientExternalModules,
+                    isLibFile: result.isLibFile,
+                    typeReferenceDirectives: _this.convertFileReferences(result.typeReferenceDirectives)
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.convertFileReferences = function (refs) {
+            if (!refs) {
+                return undefined;
+            }
+            var result = [];
+            for (var _i = 0, refs_2 = refs; _i < refs_2.length; _i++) {
+                var ref = refs_2[_i];
+                result.push({
+                    path: ts.normalizeSlashes(ref.fileName),
+                    position: ref.pos,
+                    length: ref.end - ref.pos
+                });
+            }
+            return result;
+        };
+        CoreServicesShimObject.prototype.getTSConfigFileInfo = function (fileName, sourceTextSnapshot) {
+            var _this = this;
+            return this.forwardJSONCall("getTSConfigFileInfo('" + fileName + "')", function () {
+                var text = sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength());
+                var result = ts.parseConfigFileTextToJson(fileName, text);
+                if (result.error) {
+                    return {
+                        options: {},
+                        typingOptions: {},
+                        files: [],
+                        raw: {},
+                        errors: [realizeDiagnostic(result.error, "\r\n")]
+                    };
+                }
+                var normalizedFileName = ts.normalizeSlashes(fileName);
+                var configFile = ts.parseJsonConfigFileContent(result.config, _this.host, ts.getDirectoryPath(normalizedFileName), /*existingOptions*/ {}, normalizedFileName);
+                return {
+                    options: configFile.options,
+                    typingOptions: configFile.typingOptions,
+                    files: configFile.fileNames,
+                    raw: configFile.raw,
+                    errors: realizeDiagnostics(configFile.errors, "\r\n")
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.getDefaultCompilationSettings = function () {
+            return this.forwardJSONCall("getDefaultCompilationSettings()", function () { return ts.getDefaultCompilerOptions(); });
+        };
+        CoreServicesShimObject.prototype.discoverTypings = function (discoverTypingsJson) {
+            var _this = this;
+            var getCanonicalFileName = ts.createGetCanonicalFileName(/*useCaseSensitivefileNames:*/ false);
+            return this.forwardJSONCall("discoverTypings()", function () {
+                var info = JSON.parse(discoverTypingsJson);
+                return ts.JsTyping.discoverTypings(_this.host, info.fileNames, ts.toPath(info.projectRootPath, info.projectRootPath, getCanonicalFileName), ts.toPath(info.safeListPath, info.safeListPath, getCanonicalFileName), info.packageNameToTypingLocation, info.typingOptions, info.compilerOptions);
+            });
+        };
+        return CoreServicesShimObject;
+    }(ShimBase));
+    var TypeScriptServicesFactory = (function () {
+        function TypeScriptServicesFactory() {
+            this._shims = [];
+        }
+        /*
+         * Returns script API version.
+         */
+        TypeScriptServicesFactory.prototype.getServicesVersion = function () {
+            return ts.servicesVersion;
+        };
+        TypeScriptServicesFactory.prototype.createLanguageServiceShim = function (host) {
+            try {
+                if (this.documentRegistry === undefined) {
+                    this.documentRegistry = ts.createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory());
+                }
+                var hostAdapter = new LanguageServiceShimHostAdapter(host);
+                var languageService = ts.createLanguageService(hostAdapter, this.documentRegistry);
+                return new LanguageServiceShimObject(this, host, languageService);
+            }
+            catch (err) {
+                logInternalError(host, err);
+                throw err;
+            }
+        };
+        TypeScriptServicesFactory.prototype.createClassifierShim = function (logger) {
+            try {
+                return new ClassifierShimObject(this, logger);
+            }
+            catch (err) {
+                logInternalError(logger, err);
+                throw err;
+            }
+        };
+        TypeScriptServicesFactory.prototype.createCoreServicesShim = function (host) {
+            try {
+                var adapter = new CoreServicesShimHostAdapter(host);
+                return new CoreServicesShimObject(this, host, adapter);
+            }
+            catch (err) {
+                logInternalError(host, err);
+                throw err;
+            }
+        };
+        TypeScriptServicesFactory.prototype.close = function () {
+            // Forget all the registered shims
+            this._shims = [];
+            this.documentRegistry = undefined;
+        };
+        TypeScriptServicesFactory.prototype.registerShim = function (shim) {
+            this._shims.push(shim);
+        };
+        TypeScriptServicesFactory.prototype.unregisterShim = function (shim) {
+            for (var i = 0, n = this._shims.length; i < n; i++) {
+                if (this._shims[i] === shim) {
+                    delete this._shims[i];
+                    return;
+                }
+            }
+            throw new Error("Invalid operation");
+        };
+        return TypeScriptServicesFactory;
+    }());
+    ts.TypeScriptServicesFactory = TypeScriptServicesFactory;
+    if (typeof module !== "undefined" && module.exports) {
+        module.exports = ts;
+    }
+})(ts || (ts = {}));
+/* tslint:enable:no-in-operator */
+/* tslint:enable:no-null */
+/// TODO: this is used by VS, clean this up on both sides of the interface
+/* @internal */
+var TypeScript;
+(function (TypeScript) {
+    var Services;
+    (function (Services) {
+        Services.TypeScriptServicesFactory = ts.TypeScriptServicesFactory;
+    })(Services = TypeScript.Services || (TypeScript.Services = {}));
+})(TypeScript || (TypeScript = {}));
+/* tslint:disable:no-unused-variable */
+// 'toolsVersion' gets consumed by the managed side, so it's not unused.
+// TODO: it should be moved into a namespace though.
+/* @internal */
+var toolsVersion = "1.9";
+/* tslint:enable:no-unused-variable */ 
diff --git a/lib/typescriptServices.d.ts b/lib/typescriptServices.d.ts
index 67530e211bc..a9930066fc1 100644
--- a/lib/typescriptServices.d.ts
+++ b/lib/typescriptServices.d.ts
@@ -13,2491 +13,2511 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
-declare namespace ts {
-    interface Map<T> {
-        [index: string]: T;
-    }
-    type Path = string & {
-        __pathBrand: any;
-    };
-    interface FileMap<T> {
-        get(fileName: Path): T;
-        set(fileName: Path, value: T): void;
-        contains(fileName: Path): boolean;
-        remove(fileName: Path): void;
-        forEachValue(f: (key: Path, v: T) => void): void;
-        clear(): void;
-    }
-    interface TextRange {
-        pos: number;
-        end: number;
-    }
-    enum SyntaxKind {
-        Unknown = 0,
-        EndOfFileToken = 1,
-        SingleLineCommentTrivia = 2,
-        MultiLineCommentTrivia = 3,
-        NewLineTrivia = 4,
-        WhitespaceTrivia = 5,
-        ShebangTrivia = 6,
-        ConflictMarkerTrivia = 7,
-        NumericLiteral = 8,
-        StringLiteral = 9,
-        RegularExpressionLiteral = 10,
-        NoSubstitutionTemplateLiteral = 11,
-        TemplateHead = 12,
-        TemplateMiddle = 13,
-        TemplateTail = 14,
-        OpenBraceToken = 15,
-        CloseBraceToken = 16,
-        OpenParenToken = 17,
-        CloseParenToken = 18,
-        OpenBracketToken = 19,
-        CloseBracketToken = 20,
-        DotToken = 21,
-        DotDotDotToken = 22,
-        SemicolonToken = 23,
-        CommaToken = 24,
-        LessThanToken = 25,
-        LessThanSlashToken = 26,
-        GreaterThanToken = 27,
-        LessThanEqualsToken = 28,
-        GreaterThanEqualsToken = 29,
-        EqualsEqualsToken = 30,
-        ExclamationEqualsToken = 31,
-        EqualsEqualsEqualsToken = 32,
-        ExclamationEqualsEqualsToken = 33,
-        EqualsGreaterThanToken = 34,
-        PlusToken = 35,
-        MinusToken = 36,
-        AsteriskToken = 37,
-        AsteriskAsteriskToken = 38,
-        SlashToken = 39,
-        PercentToken = 40,
-        PlusPlusToken = 41,
-        MinusMinusToken = 42,
-        LessThanLessThanToken = 43,
-        GreaterThanGreaterThanToken = 44,
-        GreaterThanGreaterThanGreaterThanToken = 45,
-        AmpersandToken = 46,
-        BarToken = 47,
-        CaretToken = 48,
-        ExclamationToken = 49,
-        TildeToken = 50,
-        AmpersandAmpersandToken = 51,
-        BarBarToken = 52,
-        QuestionToken = 53,
-        ColonToken = 54,
-        AtToken = 55,
-        EqualsToken = 56,
-        PlusEqualsToken = 57,
-        MinusEqualsToken = 58,
-        AsteriskEqualsToken = 59,
-        AsteriskAsteriskEqualsToken = 60,
-        SlashEqualsToken = 61,
-        PercentEqualsToken = 62,
-        LessThanLessThanEqualsToken = 63,
-        GreaterThanGreaterThanEqualsToken = 64,
-        GreaterThanGreaterThanGreaterThanEqualsToken = 65,
-        AmpersandEqualsToken = 66,
-        BarEqualsToken = 67,
-        CaretEqualsToken = 68,
-        Identifier = 69,
-        BreakKeyword = 70,
-        CaseKeyword = 71,
-        CatchKeyword = 72,
-        ClassKeyword = 73,
-        ConstKeyword = 74,
-        ContinueKeyword = 75,
-        DebuggerKeyword = 76,
-        DefaultKeyword = 77,
-        DeleteKeyword = 78,
-        DoKeyword = 79,
-        ElseKeyword = 80,
-        EnumKeyword = 81,
-        ExportKeyword = 82,
-        ExtendsKeyword = 83,
-        FalseKeyword = 84,
-        FinallyKeyword = 85,
-        ForKeyword = 86,
-        FunctionKeyword = 87,
-        IfKeyword = 88,
-        ImportKeyword = 89,
-        InKeyword = 90,
-        InstanceOfKeyword = 91,
-        NewKeyword = 92,
-        NullKeyword = 93,
-        ReturnKeyword = 94,
-        SuperKeyword = 95,
-        SwitchKeyword = 96,
-        ThisKeyword = 97,
-        ThrowKeyword = 98,
-        TrueKeyword = 99,
-        TryKeyword = 100,
-        TypeOfKeyword = 101,
-        VarKeyword = 102,
-        VoidKeyword = 103,
-        WhileKeyword = 104,
-        WithKeyword = 105,
-        ImplementsKeyword = 106,
-        InterfaceKeyword = 107,
-        LetKeyword = 108,
-        PackageKeyword = 109,
-        PrivateKeyword = 110,
-        ProtectedKeyword = 111,
-        PublicKeyword = 112,
-        StaticKeyword = 113,
-        YieldKeyword = 114,
-        AbstractKeyword = 115,
-        AsKeyword = 116,
-        AnyKeyword = 117,
-        AsyncKeyword = 118,
-        AwaitKeyword = 119,
-        BooleanKeyword = 120,
-        ConstructorKeyword = 121,
-        DeclareKeyword = 122,
-        GetKeyword = 123,
-        IsKeyword = 124,
-        ModuleKeyword = 125,
-        NamespaceKeyword = 126,
-        NeverKeyword = 127,
-        ReadonlyKeyword = 128,
-        RequireKeyword = 129,
-        NumberKeyword = 130,
-        SetKeyword = 131,
-        StringKeyword = 132,
-        SymbolKeyword = 133,
-        TypeKeyword = 134,
-        UndefinedKeyword = 135,
-        FromKeyword = 136,
-        GlobalKeyword = 137,
-        OfKeyword = 138,
-        QualifiedName = 139,
-        ComputedPropertyName = 140,
-        TypeParameter = 141,
-        Parameter = 142,
-        Decorator = 143,
-        PropertySignature = 144,
-        PropertyDeclaration = 145,
-        MethodSignature = 146,
-        MethodDeclaration = 147,
-        Constructor = 148,
-        GetAccessor = 149,
-        SetAccessor = 150,
-        CallSignature = 151,
-        ConstructSignature = 152,
-        IndexSignature = 153,
-        TypePredicate = 154,
-        TypeReference = 155,
-        FunctionType = 156,
-        ConstructorType = 157,
-        TypeQuery = 158,
-        TypeLiteral = 159,
-        ArrayType = 160,
-        TupleType = 161,
-        UnionType = 162,
-        IntersectionType = 163,
-        ParenthesizedType = 164,
-        ThisType = 165,
-        StringLiteralType = 166,
-        ObjectBindingPattern = 167,
-        ArrayBindingPattern = 168,
-        BindingElement = 169,
-        ArrayLiteralExpression = 170,
-        ObjectLiteralExpression = 171,
-        PropertyAccessExpression = 172,
-        ElementAccessExpression = 173,
-        CallExpression = 174,
-        NewExpression = 175,
-        TaggedTemplateExpression = 176,
-        TypeAssertionExpression = 177,
-        ParenthesizedExpression = 178,
-        FunctionExpression = 179,
-        ArrowFunction = 180,
-        DeleteExpression = 181,
-        TypeOfExpression = 182,
-        VoidExpression = 183,
-        AwaitExpression = 184,
-        PrefixUnaryExpression = 185,
-        PostfixUnaryExpression = 186,
-        BinaryExpression = 187,
-        ConditionalExpression = 188,
-        TemplateExpression = 189,
-        YieldExpression = 190,
-        SpreadElementExpression = 191,
-        ClassExpression = 192,
-        OmittedExpression = 193,
-        ExpressionWithTypeArguments = 194,
-        AsExpression = 195,
-        NonNullExpression = 196,
-        TemplateSpan = 197,
-        SemicolonClassElement = 198,
-        Block = 199,
-        VariableStatement = 200,
-        EmptyStatement = 201,
-        ExpressionStatement = 202,
-        IfStatement = 203,
-        DoStatement = 204,
-        WhileStatement = 205,
-        ForStatement = 206,
-        ForInStatement = 207,
-        ForOfStatement = 208,
-        ContinueStatement = 209,
-        BreakStatement = 210,
-        ReturnStatement = 211,
-        WithStatement = 212,
-        SwitchStatement = 213,
-        LabeledStatement = 214,
-        ThrowStatement = 215,
-        TryStatement = 216,
-        DebuggerStatement = 217,
-        VariableDeclaration = 218,
-        VariableDeclarationList = 219,
-        FunctionDeclaration = 220,
-        ClassDeclaration = 221,
-        InterfaceDeclaration = 222,
-        TypeAliasDeclaration = 223,
-        EnumDeclaration = 224,
-        ModuleDeclaration = 225,
-        ModuleBlock = 226,
-        CaseBlock = 227,
-        NamespaceExportDeclaration = 228,
-        ImportEqualsDeclaration = 229,
-        ImportDeclaration = 230,
-        ImportClause = 231,
-        NamespaceImport = 232,
-        NamedImports = 233,
-        ImportSpecifier = 234,
-        ExportAssignment = 235,
-        ExportDeclaration = 236,
-        NamedExports = 237,
-        ExportSpecifier = 238,
-        MissingDeclaration = 239,
-        ExternalModuleReference = 240,
-        JsxElement = 241,
-        JsxSelfClosingElement = 242,
-        JsxOpeningElement = 243,
-        JsxText = 244,
-        JsxClosingElement = 245,
-        JsxAttribute = 246,
-        JsxSpreadAttribute = 247,
-        JsxExpression = 248,
-        CaseClause = 249,
-        DefaultClause = 250,
-        HeritageClause = 251,
-        CatchClause = 252,
-        PropertyAssignment = 253,
-        ShorthandPropertyAssignment = 254,
-        EnumMember = 255,
-        SourceFile = 256,
-        JSDocTypeExpression = 257,
-        JSDocAllType = 258,
-        JSDocUnknownType = 259,
-        JSDocArrayType = 260,
-        JSDocUnionType = 261,
-        JSDocTupleType = 262,
-        JSDocNullableType = 263,
-        JSDocNonNullableType = 264,
-        JSDocRecordType = 265,
-        JSDocRecordMember = 266,
-        JSDocTypeReference = 267,
-        JSDocOptionalType = 268,
-        JSDocFunctionType = 269,
-        JSDocVariadicType = 270,
-        JSDocConstructorType = 271,
-        JSDocThisType = 272,
-        JSDocComment = 273,
-        JSDocTag = 274,
-        JSDocParameterTag = 275,
-        JSDocReturnTag = 276,
-        JSDocTypeTag = 277,
-        JSDocTemplateTag = 278,
-        SyntaxList = 279,
-        Count = 280,
-        FirstAssignment = 56,
-        LastAssignment = 68,
-        FirstReservedWord = 70,
-        LastReservedWord = 105,
-        FirstKeyword = 70,
-        LastKeyword = 138,
-        FirstFutureReservedWord = 106,
-        LastFutureReservedWord = 114,
-        FirstTypeNode = 154,
-        LastTypeNode = 166,
-        FirstPunctuation = 15,
-        LastPunctuation = 68,
-        FirstToken = 0,
-        LastToken = 138,
-        FirstTriviaToken = 2,
-        LastTriviaToken = 7,
-        FirstLiteralToken = 8,
-        LastLiteralToken = 11,
-        FirstTemplateToken = 11,
-        LastTemplateToken = 14,
-        FirstBinaryOperator = 25,
-        LastBinaryOperator = 68,
-        FirstNode = 139,
-    }
-    enum NodeFlags {
-        None = 0,
-        Export = 1,
-        Ambient = 2,
-        Public = 4,
-        Private = 8,
-        Protected = 16,
-        Static = 32,
-        Readonly = 64,
-        Abstract = 128,
-        Async = 256,
-        Default = 512,
-        Let = 1024,
-        Const = 2048,
-        Namespace = 4096,
-        ExportContext = 8192,
-        ContainsThis = 16384,
-        HasImplicitReturn = 32768,
-        HasExplicitReturn = 65536,
-        GlobalAugmentation = 131072,
-        HasClassExtends = 262144,
-        HasDecorators = 524288,
-        HasParamDecorators = 1048576,
-        HasAsyncFunctions = 2097152,
-        DisallowInContext = 4194304,
-        YieldContext = 8388608,
-        DecoratorContext = 16777216,
-        AwaitContext = 33554432,
-        ThisNodeHasError = 67108864,
-        JavaScriptFile = 134217728,
-        ThisNodeOrAnySubNodesHasError = 268435456,
-        HasAggregatedChildData = 536870912,
-        HasJsxSpreadAttribute = 1073741824,
-        Modifier = 1023,
-        AccessibilityModifier = 28,
-        ParameterPropertyModifier = 92,
-        BlockScoped = 3072,
-        ReachabilityCheckFlags = 98304,
-        EmitHelperFlags = 3932160,
-        ContextFlags = 197132288,
-        TypeExcludesFlags = 41943040,
-    }
-    enum JsxFlags {
-        None = 0,
-        /** An element from a named property of the JSX.IntrinsicElements interface */
-        IntrinsicNamedElement = 1,
-        /** An element inferred from the string index signature of the JSX.IntrinsicElements interface */
-        IntrinsicIndexedElement = 2,
-        IntrinsicElement = 3,
-    }
-    interface Node extends TextRange {
-        kind: SyntaxKind;
-        flags: NodeFlags;
-        decorators?: NodeArray<Decorator>;
-        modifiers?: ModifiersArray;
-        parent?: Node;
-    }
-    interface NodeArray<T> extends Array<T>, TextRange {
-        hasTrailingComma?: boolean;
-    }
-    interface ModifiersArray extends NodeArray<Modifier> {
-        flags: number;
-    }
-    interface Modifier extends Node {
-    }
-    interface Identifier extends PrimaryExpression {
-        text: string;
-        originalKeywordKind?: SyntaxKind;
-    }
-    interface QualifiedName extends Node {
-        left: EntityName;
-        right: Identifier;
-    }
-    type EntityName = Identifier | QualifiedName;
-    type PropertyName = Identifier | LiteralExpression | ComputedPropertyName;
-    type DeclarationName = Identifier | LiteralExpression | ComputedPropertyName | BindingPattern;
-    interface Declaration extends Node {
-        _declarationBrand: any;
-        name?: DeclarationName;
-    }
-    interface DeclarationStatement extends Declaration, Statement {
-        name?: Identifier;
-    }
-    interface ComputedPropertyName extends Node {
-        expression: Expression;
-    }
-    interface Decorator extends Node {
-        expression: LeftHandSideExpression;
-    }
-    interface TypeParameterDeclaration extends Declaration {
-        name: Identifier;
-        constraint?: TypeNode;
-        expression?: Expression;
-    }
-    interface SignatureDeclaration extends Declaration {
-        name?: PropertyName;
-        typeParameters?: NodeArray<TypeParameterDeclaration>;
-        parameters: NodeArray<ParameterDeclaration>;
-        type?: TypeNode;
-    }
-    interface CallSignatureDeclaration extends SignatureDeclaration, TypeElement {
-    }
-    interface ConstructSignatureDeclaration extends SignatureDeclaration, TypeElement {
-    }
-    interface VariableDeclaration extends Declaration {
-        parent?: VariableDeclarationList;
-        name: Identifier | BindingPattern;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface VariableDeclarationList extends Node {
-        declarations: NodeArray<VariableDeclaration>;
-    }
-    interface ParameterDeclaration extends Declaration {
-        dotDotDotToken?: Node;
-        name: Identifier | BindingPattern;
-        questionToken?: Node;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface BindingElement extends Declaration {
-        propertyName?: PropertyName;
-        dotDotDotToken?: Node;
-        name: Identifier | BindingPattern;
-        initializer?: Expression;
-    }
-    interface PropertySignature extends TypeElement {
-        name: PropertyName;
-        questionToken?: Node;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface PropertyDeclaration extends ClassElement {
-        questionToken?: Node;
-        name: PropertyName;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface ObjectLiteralElement extends Declaration {
-        _objectLiteralBrandBrand: any;
-        name?: PropertyName;
-    }
-    interface PropertyAssignment extends ObjectLiteralElement {
-        _propertyAssignmentBrand: any;
-        name: PropertyName;
-        questionToken?: Node;
-        initializer: Expression;
-    }
-    interface ShorthandPropertyAssignment extends ObjectLiteralElement {
-        name: Identifier;
-        questionToken?: Node;
-        equalsToken?: Node;
-        objectAssignmentInitializer?: Expression;
-    }
-    interface VariableLikeDeclaration extends Declaration {
-        propertyName?: PropertyName;
-        dotDotDotToken?: Node;
-        name: DeclarationName;
-        questionToken?: Node;
-        type?: TypeNode;
-        initializer?: Expression;
-    }
-    interface PropertyLikeDeclaration extends Declaration {
-        name: PropertyName;
-    }
-    interface BindingPattern extends Node {
-        elements: NodeArray<BindingElement>;
-    }
-    interface ObjectBindingPattern extends BindingPattern {
-    }
-    interface ArrayBindingPattern extends BindingPattern {
-    }
-    /**
-     * Several node kinds share function-like features such as a signature,
-     * a name, and a body. These nodes should extend FunctionLikeDeclaration.
-     * Examples:
-     * - FunctionDeclaration
-     * - MethodDeclaration
-     * - AccessorDeclaration
-     */
-    interface FunctionLikeDeclaration extends SignatureDeclaration {
-        _functionLikeDeclarationBrand: any;
-        asteriskToken?: Node;
-        questionToken?: Node;
-        body?: Block | Expression;
-    }
-    interface FunctionDeclaration extends FunctionLikeDeclaration, DeclarationStatement {
-        name?: Identifier;
-        body?: FunctionBody;
-    }
-    interface MethodSignature extends SignatureDeclaration, TypeElement {
-        name: PropertyName;
-    }
-    interface MethodDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
-        name: PropertyName;
-        body?: FunctionBody;
-    }
-    interface ConstructorDeclaration extends FunctionLikeDeclaration, ClassElement {
-        body?: FunctionBody;
-    }
-    interface SemicolonClassElement extends ClassElement {
-        _semicolonClassElementBrand: any;
-    }
-    interface AccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
-        _accessorDeclarationBrand: any;
-        name: PropertyName;
-        body: FunctionBody;
-    }
-    interface GetAccessorDeclaration extends AccessorDeclaration {
-    }
-    interface SetAccessorDeclaration extends AccessorDeclaration {
-    }
-    interface IndexSignatureDeclaration extends SignatureDeclaration, ClassElement, TypeElement {
-        _indexSignatureDeclarationBrand: any;
-    }
-    interface TypeNode extends Node {
-        _typeNodeBrand: any;
-    }
-    interface ThisTypeNode extends TypeNode {
-        _thisTypeNodeBrand: any;
-    }
-    interface FunctionOrConstructorTypeNode extends TypeNode, SignatureDeclaration {
-        _functionOrConstructorTypeNodeBrand: any;
-    }
-    interface FunctionTypeNode extends FunctionOrConstructorTypeNode {
-    }
-    interface ConstructorTypeNode extends FunctionOrConstructorTypeNode {
-    }
-    interface TypeReferenceNode extends TypeNode {
-        typeName: EntityName;
-        typeArguments?: NodeArray<TypeNode>;
-    }
-    interface TypePredicateNode extends TypeNode {
-        parameterName: Identifier | ThisTypeNode;
-        type: TypeNode;
-    }
-    interface TypeQueryNode extends TypeNode {
-        exprName: EntityName;
-    }
-    interface TypeLiteralNode extends TypeNode, Declaration {
-        members: NodeArray<TypeElement>;
-    }
-    interface ArrayTypeNode extends TypeNode {
-        elementType: TypeNode;
-    }
-    interface TupleTypeNode extends TypeNode {
-        elementTypes: NodeArray<TypeNode>;
-    }
-    interface UnionOrIntersectionTypeNode extends TypeNode {
-        types: NodeArray<TypeNode>;
-    }
-    interface UnionTypeNode extends UnionOrIntersectionTypeNode {
-    }
-    interface IntersectionTypeNode extends UnionOrIntersectionTypeNode {
-    }
-    interface ParenthesizedTypeNode extends TypeNode {
-        type: TypeNode;
-    }
-    interface StringLiteralTypeNode extends LiteralLikeNode, TypeNode {
-        _stringLiteralTypeBrand: any;
-    }
-    interface StringLiteral extends LiteralExpression {
-        _stringLiteralBrand: any;
-    }
-    interface Expression extends Node {
-        _expressionBrand: any;
-        contextualType?: Type;
-    }
-    interface OmittedExpression extends Expression {
-    }
-    interface UnaryExpression extends Expression {
-        _unaryExpressionBrand: any;
-    }
-    interface IncrementExpression extends UnaryExpression {
-        _incrementExpressionBrand: any;
-    }
-    interface PrefixUnaryExpression extends IncrementExpression {
-        operator: SyntaxKind;
-        operand: UnaryExpression;
-    }
-    interface PostfixUnaryExpression extends IncrementExpression {
-        operand: LeftHandSideExpression;
-        operator: SyntaxKind;
-    }
-    interface PostfixExpression extends UnaryExpression {
-        _postfixExpressionBrand: any;
-    }
-    interface LeftHandSideExpression extends IncrementExpression {
-        _leftHandSideExpressionBrand: any;
-    }
-    interface MemberExpression extends LeftHandSideExpression {
-        _memberExpressionBrand: any;
-    }
-    interface PrimaryExpression extends MemberExpression {
-        _primaryExpressionBrand: any;
-    }
-    interface DeleteExpression extends UnaryExpression {
-        expression: UnaryExpression;
-    }
-    interface TypeOfExpression extends UnaryExpression {
-        expression: UnaryExpression;
-    }
-    interface VoidExpression extends UnaryExpression {
-        expression: UnaryExpression;
-    }
-    interface AwaitExpression extends UnaryExpression {
-        expression: UnaryExpression;
-    }
-    interface YieldExpression extends Expression {
-        asteriskToken?: Node;
-        expression?: Expression;
-    }
-    interface BinaryExpression extends Expression, Declaration {
-        left: Expression;
-        operatorToken: Node;
-        right: Expression;
-    }
-    interface ConditionalExpression extends Expression {
-        condition: Expression;
-        questionToken: Node;
-        whenTrue: Expression;
-        colonToken: Node;
-        whenFalse: Expression;
-    }
-    type FunctionBody = Block;
-    type ConciseBody = FunctionBody | Expression;
-    interface FunctionExpression extends PrimaryExpression, FunctionLikeDeclaration {
-        name?: Identifier;
-        body: FunctionBody;
-    }
-    interface ArrowFunction extends Expression, FunctionLikeDeclaration {
-        equalsGreaterThanToken: Node;
-        body: ConciseBody;
-    }
-    interface LiteralLikeNode extends Node {
-        text: string;
-        isUnterminated?: boolean;
-        hasExtendedUnicodeEscape?: boolean;
-    }
-    interface LiteralExpression extends LiteralLikeNode, PrimaryExpression {
-        _literalExpressionBrand: any;
-    }
-    interface TemplateLiteralFragment extends LiteralLikeNode {
-        _templateLiteralFragmentBrand: any;
-    }
-    interface TemplateExpression extends PrimaryExpression {
-        head: TemplateLiteralFragment;
-        templateSpans: NodeArray<TemplateSpan>;
-    }
-    interface TemplateSpan extends Node {
-        expression: Expression;
-        literal: TemplateLiteralFragment;
-    }
-    interface ParenthesizedExpression extends PrimaryExpression {
-        expression: Expression;
-    }
-    interface ArrayLiteralExpression extends PrimaryExpression {
-        elements: NodeArray<Expression>;
-    }
-    interface SpreadElementExpression extends Expression {
-        expression: Expression;
-    }
-    interface ObjectLiteralExpression extends PrimaryExpression, Declaration {
-        properties: NodeArray<ObjectLiteralElement>;
-    }
-    interface PropertyAccessExpression extends MemberExpression, Declaration {
-        expression: LeftHandSideExpression;
-        dotToken: Node;
-        name: Identifier;
-    }
-    type IdentifierOrPropertyAccess = Identifier | PropertyAccessExpression;
-    interface ElementAccessExpression extends MemberExpression {
-        expression: LeftHandSideExpression;
-        argumentExpression?: Expression;
-    }
-    interface CallExpression extends LeftHandSideExpression, Declaration {
-        expression: LeftHandSideExpression;
-        typeArguments?: NodeArray<TypeNode>;
-        arguments: NodeArray<Expression>;
-    }
-    interface ExpressionWithTypeArguments extends TypeNode {
-        expression: LeftHandSideExpression;
-        typeArguments?: NodeArray<TypeNode>;
-    }
-    interface NewExpression extends CallExpression, PrimaryExpression {
-    }
-    interface TaggedTemplateExpression extends MemberExpression {
-        tag: LeftHandSideExpression;
-        template: LiteralExpression | TemplateExpression;
-    }
-    type CallLikeExpression = CallExpression | NewExpression | TaggedTemplateExpression | Decorator;
-    interface AsExpression extends Expression {
-        expression: Expression;
-        type: TypeNode;
-    }
-    interface TypeAssertion extends UnaryExpression {
-        type: TypeNode;
-        expression: UnaryExpression;
-    }
-    type AssertionExpression = TypeAssertion | AsExpression;
-    interface NonNullExpression extends LeftHandSideExpression {
-        expression: Expression;
-    }
-    interface JsxElement extends PrimaryExpression {
-        openingElement: JsxOpeningElement;
-        children: NodeArray<JsxChild>;
-        closingElement: JsxClosingElement;
-    }
-    interface JsxOpeningElement extends Expression {
-        _openingElementBrand?: any;
-        tagName: EntityName;
-        attributes: NodeArray<JsxAttribute | JsxSpreadAttribute>;
-    }
-    interface JsxSelfClosingElement extends PrimaryExpression, JsxOpeningElement {
-        _selfClosingElementBrand?: any;
-    }
-    type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
-    interface JsxAttribute extends Node {
-        name: Identifier;
-        initializer?: Expression;
-    }
-    interface JsxSpreadAttribute extends Node {
-        expression: Expression;
-    }
-    interface JsxClosingElement extends Node {
-        tagName: EntityName;
-    }
-    interface JsxExpression extends Expression {
-        expression?: Expression;
-    }
-    interface JsxText extends Node {
-        _jsxTextExpressionBrand: any;
-    }
-    type JsxChild = JsxText | JsxExpression | JsxElement | JsxSelfClosingElement;
-    interface Statement extends Node {
-        _statementBrand: any;
-    }
-    interface EmptyStatement extends Statement {
-    }
-    interface DebuggerStatement extends Statement {
-    }
-    interface MissingDeclaration extends DeclarationStatement, ClassElement, ObjectLiteralElement, TypeElement {
-        name?: Identifier;
-    }
-    type BlockLike = SourceFile | Block | ModuleBlock | CaseClause;
-    interface Block extends Statement {
-        statements: NodeArray<Statement>;
-    }
-    interface VariableStatement extends Statement {
-        declarationList: VariableDeclarationList;
-    }
-    interface ExpressionStatement extends Statement {
-        expression: Expression;
-    }
-    interface IfStatement extends Statement {
-        expression: Expression;
-        thenStatement: Statement;
-        elseStatement?: Statement;
-    }
-    interface IterationStatement extends Statement {
-        statement: Statement;
-    }
-    interface DoStatement extends IterationStatement {
-        expression: Expression;
-    }
-    interface WhileStatement extends IterationStatement {
-        expression: Expression;
-    }
-    interface ForStatement extends IterationStatement {
-        initializer?: VariableDeclarationList | Expression;
-        condition?: Expression;
-        incrementor?: Expression;
-    }
-    interface ForInStatement extends IterationStatement {
-        initializer: VariableDeclarationList | Expression;
-        expression: Expression;
-    }
-    interface ForOfStatement extends IterationStatement {
-        initializer: VariableDeclarationList | Expression;
-        expression: Expression;
-    }
-    interface BreakStatement extends Statement {
-        label?: Identifier;
-    }
-    interface ContinueStatement extends Statement {
-        label?: Identifier;
-    }
-    type BreakOrContinueStatement = BreakStatement | ContinueStatement;
-    interface ReturnStatement extends Statement {
-        expression?: Expression;
-    }
-    interface WithStatement extends Statement {
-        expression: Expression;
-        statement: Statement;
-    }
-    interface SwitchStatement extends Statement {
-        expression: Expression;
-        caseBlock: CaseBlock;
-    }
-    interface CaseBlock extends Node {
-        clauses: NodeArray<CaseOrDefaultClause>;
-    }
-    interface CaseClause extends Node {
-        expression: Expression;
-        statements: NodeArray<Statement>;
-    }
-    interface DefaultClause extends Node {
-        statements: NodeArray<Statement>;
-    }
-    type CaseOrDefaultClause = CaseClause | DefaultClause;
-    interface LabeledStatement extends Statement {
-        label: Identifier;
-        statement: Statement;
-    }
-    interface ThrowStatement extends Statement {
-        expression: Expression;
-    }
-    interface TryStatement extends Statement {
-        tryBlock: Block;
-        catchClause?: CatchClause;
-        finallyBlock?: Block;
-    }
-    interface CatchClause extends Node {
-        variableDeclaration: VariableDeclaration;
-        block: Block;
-    }
-    type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration;
-    interface ClassLikeDeclaration extends Declaration {
-        name?: Identifier;
-        typeParameters?: NodeArray<TypeParameterDeclaration>;
-        heritageClauses?: NodeArray<HeritageClause>;
-        members: NodeArray<ClassElement>;
-    }
-    interface ClassDeclaration extends ClassLikeDeclaration, DeclarationStatement {
-        name?: Identifier;
-    }
-    interface ClassExpression extends ClassLikeDeclaration, PrimaryExpression {
-    }
-    interface ClassElement extends Declaration {
-        _classElementBrand: any;
-        name?: PropertyName;
-    }
-    interface TypeElement extends Declaration {
-        _typeElementBrand: any;
-        name?: PropertyName;
-        questionToken?: Node;
-    }
-    interface InterfaceDeclaration extends DeclarationStatement {
-        name: Identifier;
-        typeParameters?: NodeArray<TypeParameterDeclaration>;
-        heritageClauses?: NodeArray<HeritageClause>;
-        members: NodeArray<TypeElement>;
-    }
-    interface HeritageClause extends Node {
-        token: SyntaxKind;
-        types?: NodeArray<ExpressionWithTypeArguments>;
-    }
-    interface TypeAliasDeclaration extends DeclarationStatement {
-        name: Identifier;
-        typeParameters?: NodeArray<TypeParameterDeclaration>;
-        type: TypeNode;
-    }
-    interface EnumMember extends Declaration {
-        name: DeclarationName;
-        initializer?: Expression;
-    }
-    interface EnumDeclaration extends DeclarationStatement {
-        name: Identifier;
-        members: NodeArray<EnumMember>;
-    }
-    type ModuleBody = ModuleBlock | ModuleDeclaration;
-    interface ModuleDeclaration extends DeclarationStatement {
-        name: Identifier | LiteralExpression;
-        body: ModuleBlock | ModuleDeclaration;
-    }
-    interface ModuleBlock extends Node, Statement {
-        statements: NodeArray<Statement>;
-    }
-    interface ImportEqualsDeclaration extends DeclarationStatement {
-        name: Identifier;
-        moduleReference: EntityName | ExternalModuleReference;
-    }
-    interface ExternalModuleReference extends Node {
-        expression?: Expression;
-    }
-    interface ImportDeclaration extends Statement {
-        importClause?: ImportClause;
-        moduleSpecifier: Expression;
-    }
-    interface ImportClause extends Declaration {
-        name?: Identifier;
-        namedBindings?: NamespaceImport | NamedImports;
-    }
-    interface NamespaceImport extends Declaration {
-        name: Identifier;
-    }
-    interface NamespaceExportDeclaration extends DeclarationStatement {
-        name: Identifier;
-        moduleReference: LiteralLikeNode;
-    }
-    interface ExportDeclaration extends DeclarationStatement {
-        exportClause?: NamedExports;
-        moduleSpecifier?: Expression;
-    }
-    interface NamedImports extends Node {
-        elements: NodeArray<ImportSpecifier>;
-    }
-    interface NamedExports extends Node {
-        elements: NodeArray<ExportSpecifier>;
-    }
-    type NamedImportsOrExports = NamedImports | NamedExports;
-    interface ImportSpecifier extends Declaration {
-        propertyName?: Identifier;
-        name: Identifier;
-    }
-    interface ExportSpecifier extends Declaration {
-        propertyName?: Identifier;
-        name: Identifier;
-    }
-    type ImportOrExportSpecifier = ImportSpecifier | ExportSpecifier;
-    interface ExportAssignment extends DeclarationStatement {
-        isExportEquals?: boolean;
-        expression: Expression;
-    }
-    interface FileReference extends TextRange {
-        fileName: string;
-    }
-    interface CommentRange extends TextRange {
-        hasTrailingNewLine?: boolean;
-        kind: SyntaxKind;
-    }
-    interface JSDocTypeExpression extends Node {
-        type: JSDocType;
-    }
-    interface JSDocType extends TypeNode {
-        _jsDocTypeBrand: any;
-    }
-    interface JSDocAllType extends JSDocType {
-        _JSDocAllTypeBrand: any;
-    }
-    interface JSDocUnknownType extends JSDocType {
-        _JSDocUnknownTypeBrand: any;
-    }
-    interface JSDocArrayType extends JSDocType {
-        elementType: JSDocType;
-    }
-    interface JSDocUnionType extends JSDocType {
-        types: NodeArray<JSDocType>;
-    }
-    interface JSDocTupleType extends JSDocType {
-        types: NodeArray<JSDocType>;
-    }
-    interface JSDocNonNullableType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocNullableType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocRecordType extends JSDocType, TypeLiteralNode {
-        members: NodeArray<JSDocRecordMember>;
-    }
-    interface JSDocTypeReference extends JSDocType {
-        name: EntityName;
-        typeArguments: NodeArray<JSDocType>;
-    }
-    interface JSDocOptionalType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocFunctionType extends JSDocType, SignatureDeclaration {
-        parameters: NodeArray<ParameterDeclaration>;
-        type: JSDocType;
-    }
-    interface JSDocVariadicType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocConstructorType extends JSDocType {
-        type: JSDocType;
-    }
-    interface JSDocThisType extends JSDocType {
-        type: JSDocType;
-    }
-    type JSDocTypeReferencingNode = JSDocThisType | JSDocConstructorType | JSDocVariadicType | JSDocOptionalType | JSDocNullableType | JSDocNonNullableType;
-    interface JSDocRecordMember extends PropertySignature {
-        name: Identifier | LiteralExpression;
-        type?: JSDocType;
-    }
-    interface JSDocComment extends Node {
-        tags: NodeArray<JSDocTag>;
-    }
-    interface JSDocTag extends Node {
-        atToken: Node;
-        tagName: Identifier;
-    }
-    interface JSDocTemplateTag extends JSDocTag {
-        typeParameters: NodeArray<TypeParameterDeclaration>;
-    }
-    interface JSDocReturnTag extends JSDocTag {
-        typeExpression: JSDocTypeExpression;
-    }
-    interface JSDocTypeTag extends JSDocTag {
-        typeExpression: JSDocTypeExpression;
-    }
-    interface JSDocParameterTag extends JSDocTag {
-        preParameterName?: Identifier;
-        typeExpression?: JSDocTypeExpression;
-        postParameterName?: Identifier;
-        isBracketed: boolean;
-    }
-    enum FlowFlags {
-        Unreachable = 1,
-        Start = 2,
-        BranchLabel = 4,
-        LoopLabel = 8,
-        Assignment = 16,
-        TrueCondition = 32,
-        FalseCondition = 64,
-        Referenced = 128,
-        Shared = 256,
-        Label = 12,
-        Condition = 96,
-    }
-    interface FlowNode {
-        flags: FlowFlags;
-        id?: number;
-    }
-    interface FlowLabel extends FlowNode {
-        antecedents: FlowNode[];
-    }
-    interface FlowAssignment extends FlowNode {
-        node: Expression | VariableDeclaration | BindingElement;
-        antecedent: FlowNode;
-    }
-    interface FlowCondition extends FlowNode {
-        expression: Expression;
-        antecedent: FlowNode;
-    }
-    interface AmdDependency {
-        path: string;
-        name: string;
-    }
-    interface SourceFile extends Declaration {
-        statements: NodeArray<Statement>;
-        endOfFileToken: Node;
-        fileName: string;
-        path: Path;
-        text: string;
-        amdDependencies: AmdDependency[];
-        moduleName: string;
-        referencedFiles: FileReference[];
-        typeReferenceDirectives: FileReference[];
-        languageVariant: LanguageVariant;
-        isDeclarationFile: boolean;
-        /**
-         * lib.d.ts should have a reference comment like
-         *
-         *  /// <reference no-default-lib="true"/>
-         *
-         * If any other file has this comment, it signals not to include lib.d.ts
-         * because this containing file is intended to act as a default library.
-         */
-        hasNoDefaultLib: boolean;
-        languageVersion: ScriptTarget;
-    }
-    interface ScriptReferenceHost {
-        getCompilerOptions(): CompilerOptions;
-        getSourceFile(fileName: string): SourceFile;
-        getSourceFileByPath(path: Path): SourceFile;
-        getCurrentDirectory(): string;
-    }
-    interface ParseConfigHost {
-        readDirectory(rootDir: string, extension: string, exclude: string[]): string[];
-    }
-    interface WriteFileCallback {
-        (fileName: string, data: string, writeByteOrderMark: boolean, onError?: (message: string) => void, sourceFiles?: SourceFile[]): void;
-    }
-    class OperationCanceledException {
-    }
-    interface CancellationToken {
-        isCancellationRequested(): boolean;
-        /** @throws OperationCanceledException if isCancellationRequested is true */
-        throwIfCancellationRequested(): void;
-    }
-    interface Program extends ScriptReferenceHost {
-        /**
-         * Get a list of root file names that were passed to a 'createProgram'
-         */
-        getRootFileNames(): string[];
-        /**
-         * Get a list of files in the program
-         */
-        getSourceFiles(): SourceFile[];
-        /**
-         * Emits the JavaScript and declaration files.  If targetSourceFile is not specified, then
-         * the JavaScript and declaration files will be produced for all the files in this program.
-         * If targetSourceFile is specified, then only the JavaScript and declaration for that
-         * specific file will be generated.
-         *
-         * If writeFile is not specified then the writeFile callback from the compiler host will be
-         * used for writing the JavaScript and declaration files.  Otherwise, the writeFile parameter
-         * will be invoked when writing the JavaScript and declaration files.
-         */
-        emit(targetSourceFile?: SourceFile, writeFile?: WriteFileCallback, cancellationToken?: CancellationToken): EmitResult;
-        getOptionsDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
-        getGlobalDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
-        getSyntacticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-        getSemanticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-        getDeclarationDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-        /**
-         * Gets a type checker that can be used to semantically analyze source fils in the program.
-         */
-        getTypeChecker(): TypeChecker;
-    }
-    interface SourceMapSpan {
-        /** Line number in the .js file. */
-        emittedLine: number;
-        /** Column number in the .js file. */
-        emittedColumn: number;
-        /** Line number in the .ts file. */
-        sourceLine: number;
-        /** Column number in the .ts file. */
-        sourceColumn: number;
-        /** Optional name (index into names array) associated with this span. */
-        nameIndex?: number;
-        /** .ts file (index into sources array) associated with this span */
-        sourceIndex: number;
-    }
-    interface SourceMapData {
-        sourceMapFilePath: string;
-        jsSourceMappingURL: string;
-        sourceMapFile: string;
-        sourceMapSourceRoot: string;
-        sourceMapSources: string[];
-        sourceMapSourcesContent?: string[];
-        inputSourceFileNames: string[];
-        sourceMapNames?: string[];
-        sourceMapMappings: string;
-        sourceMapDecodedMappings: SourceMapSpan[];
-    }
-    /** Return code used by getEmitOutput function to indicate status of the function */
-    enum ExitStatus {
-        Success = 0,
-        DiagnosticsPresent_OutputsSkipped = 1,
-        DiagnosticsPresent_OutputsGenerated = 2,
-    }
-    interface EmitResult {
-        emitSkipped: boolean;
-        /** Contains declaration emit diagnostics */
-        diagnostics: Diagnostic[];
-        emittedFiles: string[];
-    }
-    interface TypeChecker {
-        getTypeOfSymbolAtLocation(symbol: Symbol, node: Node): Type;
-        getDeclaredTypeOfSymbol(symbol: Symbol): Type;
-        getPropertiesOfType(type: Type): Symbol[];
-        getPropertyOfType(type: Type, propertyName: string): Symbol;
-        getSignaturesOfType(type: Type, kind: SignatureKind): Signature[];
-        getIndexTypeOfType(type: Type, kind: IndexKind): Type;
-        getBaseTypes(type: InterfaceType): ObjectType[];
-        getReturnTypeOfSignature(signature: Signature): Type;
-        getNonNullableType(type: Type): Type;
-        getSymbolsInScope(location: Node, meaning: SymbolFlags): Symbol[];
-        getSymbolAtLocation(node: Node): Symbol;
-        getSymbolsOfParameterPropertyDeclaration(parameter: ParameterDeclaration, parameterName: string): Symbol[];
-        getShorthandAssignmentValueSymbol(location: Node): Symbol;
-        getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol;
-        getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol;
-        getTypeAtLocation(node: Node): Type;
-        typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
-        symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): string;
-        getSymbolDisplayBuilder(): SymbolDisplayBuilder;
-        getFullyQualifiedName(symbol: Symbol): string;
-        getAugmentedPropertiesOfType(type: Type): Symbol[];
-        getRootSymbols(symbol: Symbol): Symbol[];
-        getContextualType(node: Expression): Type;
-        getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature;
-        getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature;
-        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
-        isUndefinedSymbol(symbol: Symbol): boolean;
-        isArgumentsSymbol(symbol: Symbol): boolean;
-        isUnknownSymbol(symbol: Symbol): boolean;
-        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
-        isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName, propertyName: string): boolean;
-        getAliasedSymbol(symbol: Symbol): Symbol;
-        getExportsOfModule(moduleSymbol: Symbol): Symbol[];
-        getJsxElementAttributesType(elementNode: JsxOpeningLikeElement): Type;
-        getJsxIntrinsicTagNames(): Symbol[];
-        isOptionalParameter(node: ParameterDeclaration): boolean;
-    }
-    interface SymbolDisplayBuilder {
-        buildTypeDisplay(type: Type, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildSymbolDisplay(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): void;
-        buildSignatureDisplay(signatures: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
-        buildParameterDisplay(parameter: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildTypeParameterDisplay(tp: TypeParameter, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildTypePredicateDisplay(predicate: TypePredicate, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildTypeParameterDisplayFromSymbol(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildDisplayForParametersAndDelimiters(thisType: Type, parameters: Symbol[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildDisplayForTypeParametersAndDelimiters(typeParameters: TypeParameter[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-        buildReturnTypeDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
-    }
-    interface SymbolWriter {
-        writeKeyword(text: string): void;
-        writeOperator(text: string): void;
-        writePunctuation(text: string): void;
-        writeSpace(text: string): void;
-        writeStringLiteral(text: string): void;
-        writeParameter(text: string): void;
-        writeSymbol(text: string, symbol: Symbol): void;
-        writeLine(): void;
-        increaseIndent(): void;
-        decreaseIndent(): void;
-        clear(): void;
-        trackSymbol(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): void;
-        reportInaccessibleThisError(): void;
-    }
-    enum TypeFormatFlags {
-        None = 0,
-        WriteArrayAsGenericType = 1,
-        UseTypeOfFunction = 2,
-        NoTruncation = 4,
-        WriteArrowStyleSignature = 8,
-        WriteOwnNameForAnyLike = 16,
-        WriteTypeArgumentsOfSignature = 32,
-        InElementType = 64,
-        UseFullyQualifiedType = 128,
-        InFirstTypeArgument = 256,
-    }
-    enum SymbolFormatFlags {
-        None = 0,
-        WriteTypeParametersOrArguments = 1,
-        UseOnlyExternalAliasing = 2,
-    }
-    enum TypePredicateKind {
-        This = 0,
-        Identifier = 1,
-    }
-    interface TypePredicateBase {
-        kind: TypePredicateKind;
-        type: Type;
-    }
-    interface ThisTypePredicate extends TypePredicateBase {
-        _thisTypePredicateBrand: any;
-    }
-    interface IdentifierTypePredicate extends TypePredicateBase {
-        parameterName: string;
-        parameterIndex: number;
-    }
-    type TypePredicate = IdentifierTypePredicate | ThisTypePredicate;
-    enum SymbolFlags {
-        None = 0,
-        FunctionScopedVariable = 1,
-        BlockScopedVariable = 2,
-        Property = 4,
-        EnumMember = 8,
-        Function = 16,
-        Class = 32,
-        Interface = 64,
-        ConstEnum = 128,
-        RegularEnum = 256,
-        ValueModule = 512,
-        NamespaceModule = 1024,
-        TypeLiteral = 2048,
-        ObjectLiteral = 4096,
-        Method = 8192,
-        Constructor = 16384,
-        GetAccessor = 32768,
-        SetAccessor = 65536,
-        Signature = 131072,
-        TypeParameter = 262144,
-        TypeAlias = 524288,
-        ExportValue = 1048576,
-        ExportType = 2097152,
-        ExportNamespace = 4194304,
-        Alias = 8388608,
-        Instantiated = 16777216,
-        Merged = 33554432,
-        Transient = 67108864,
-        Prototype = 134217728,
-        SyntheticProperty = 268435456,
-        Optional = 536870912,
-        ExportStar = 1073741824,
-        Enum = 384,
-        Variable = 3,
-        Value = 107455,
-        Type = 793056,
-        Namespace = 1536,
-        Module = 1536,
-        Accessor = 98304,
-        FunctionScopedVariableExcludes = 107454,
-        BlockScopedVariableExcludes = 107455,
-        ParameterExcludes = 107455,
-        PropertyExcludes = 0,
-        EnumMemberExcludes = 107455,
-        FunctionExcludes = 106927,
-        ClassExcludes = 899519,
-        InterfaceExcludes = 792960,
-        RegularEnumExcludes = 899327,
-        ConstEnumExcludes = 899967,
-        ValueModuleExcludes = 106639,
-        NamespaceModuleExcludes = 0,
-        MethodExcludes = 99263,
-        GetAccessorExcludes = 41919,
-        SetAccessorExcludes = 74687,
-        TypeParameterExcludes = 530912,
-        TypeAliasExcludes = 793056,
-        AliasExcludes = 8388608,
-        ModuleMember = 8914931,
-        ExportHasLocal = 944,
-        HasExports = 1952,
-        HasMembers = 6240,
-        BlockScoped = 418,
-        PropertyOrAccessor = 98308,
-        Export = 7340032,
-    }
-    interface Symbol {
-        flags: SymbolFlags;
-        name: string;
-        declarations?: Declaration[];
-        valueDeclaration?: Declaration;
-        members?: SymbolTable;
-        exports?: SymbolTable;
-        globalExports?: SymbolTable;
-    }
-    interface SymbolTable {
-        [index: string]: Symbol;
-    }
-    enum TypeFlags {
-        Any = 1,
-        String = 2,
-        Number = 4,
-        Boolean = 8,
-        Void = 16,
-        Undefined = 32,
-        Null = 64,
-        Enum = 128,
-        StringLiteral = 256,
-        TypeParameter = 512,
-        Class = 1024,
-        Interface = 2048,
-        Reference = 4096,
-        Tuple = 8192,
-        Union = 16384,
-        Intersection = 32768,
-        Anonymous = 65536,
-        Instantiated = 131072,
-        ObjectLiteral = 524288,
-        ESSymbol = 16777216,
-        ThisType = 33554432,
-        ObjectLiteralPatternWithComputedProperties = 67108864,
-        Never = 134217728,
-        StringLike = 258,
-        NumberLike = 132,
-        ObjectType = 80896,
-        UnionOrIntersection = 49152,
-        StructuredType = 130048,
-        Narrowable = 97793,
-    }
-    type DestructuringPattern = BindingPattern | ObjectLiteralExpression | ArrayLiteralExpression;
-    interface Type {
-        flags: TypeFlags;
-        symbol?: Symbol;
-        pattern?: DestructuringPattern;
-    }
-    interface StringLiteralType extends Type {
-        text: string;
-    }
-    interface ObjectType extends Type {
-    }
-    interface InterfaceType extends ObjectType {
-        typeParameters: TypeParameter[];
-        outerTypeParameters: TypeParameter[];
-        localTypeParameters: TypeParameter[];
-        thisType: TypeParameter;
-    }
-    interface InterfaceTypeWithDeclaredMembers extends InterfaceType {
-        declaredProperties: Symbol[];
-        declaredCallSignatures: Signature[];
-        declaredConstructSignatures: Signature[];
-        declaredStringIndexInfo: IndexInfo;
-        declaredNumberIndexInfo: IndexInfo;
-    }
-    interface TypeReference extends ObjectType {
-        target: GenericType;
-        typeArguments: Type[];
-    }
-    interface GenericType extends InterfaceType, TypeReference {
-    }
-    interface TupleType extends ObjectType {
-        elementTypes: Type[];
-    }
-    interface UnionOrIntersectionType extends Type {
-        types: Type[];
-    }
-    interface UnionType extends UnionOrIntersectionType {
-    }
-    interface IntersectionType extends UnionOrIntersectionType {
-    }
-    interface TypeParameter extends Type {
-        constraint: Type;
-    }
-    enum SignatureKind {
-        Call = 0,
-        Construct = 1,
-    }
-    interface Signature {
-        declaration: SignatureDeclaration;
-        typeParameters: TypeParameter[];
-        parameters: Symbol[];
-        thisType?: Type;
-    }
-    enum IndexKind {
-        String = 0,
-        Number = 1,
-    }
-    interface IndexInfo {
-        type: Type;
-        isReadonly: boolean;
-        declaration?: SignatureDeclaration;
-    }
-    interface DiagnosticMessage {
-        key: string;
-        category: DiagnosticCategory;
-        code: number;
-        message: string;
-    }
-    /**
-     * A linked list of formatted diagnostic messages to be used as part of a multiline message.
-     * It is built from the bottom up, leaving the head to be the "main" diagnostic.
-     * While it seems that DiagnosticMessageChain is structurally similar to DiagnosticMessage,
-     * the difference is that messages are all preformatted in DMC.
-     */
-    interface DiagnosticMessageChain {
-        messageText: string;
-        category: DiagnosticCategory;
-        code: number;
-        next?: DiagnosticMessageChain;
-    }
-    interface Diagnostic {
-        file: SourceFile;
-        start: number;
-        length: number;
-        messageText: string | DiagnosticMessageChain;
-        category: DiagnosticCategory;
-        code: number;
-    }
-    enum DiagnosticCategory {
-        Warning = 0,
-        Error = 1,
-        Message = 2,
-    }
-    enum ModuleResolutionKind {
-        Classic = 1,
-        NodeJs = 2,
-    }
-    type RootPaths = string[];
-    type PathSubstitutions = Map<string[]>;
-    type TsConfigOnlyOptions = RootPaths | PathSubstitutions;
-    type CompilerOptionsValue = string | number | boolean | (string | number)[] | TsConfigOnlyOptions;
-    interface CompilerOptions {
-        allowNonTsExtensions?: boolean;
-        charset?: string;
-        declaration?: boolean;
-        declarationDir?: string;
-        diagnostics?: boolean;
-        emitBOM?: boolean;
-        help?: boolean;
-        init?: boolean;
-        inlineSourceMap?: boolean;
-        inlineSources?: boolean;
-        jsx?: JsxEmit;
-        reactNamespace?: string;
-        listFiles?: boolean;
-        typesSearchPaths?: string[];
-        locale?: string;
-        mapRoot?: string;
-        module?: ModuleKind;
-        newLine?: NewLineKind;
-        noEmit?: boolean;
-        noEmitHelpers?: boolean;
-        noEmitOnError?: boolean;
-        noErrorTruncation?: boolean;
-        noImplicitAny?: boolean;
-        noImplicitThis?: boolean;
-        noLib?: boolean;
-        noResolve?: boolean;
-        out?: string;
-        outFile?: string;
-        outDir?: string;
-        preserveConstEnums?: boolean;
-        project?: string;
-        removeComments?: boolean;
-        rootDir?: string;
-        sourceMap?: boolean;
-        sourceRoot?: string;
-        suppressExcessPropertyErrors?: boolean;
-        suppressImplicitAnyIndexErrors?: boolean;
-        target?: ScriptTarget;
-        version?: boolean;
-        watch?: boolean;
-        isolatedModules?: boolean;
-        experimentalDecorators?: boolean;
-        emitDecoratorMetadata?: boolean;
-        moduleResolution?: ModuleResolutionKind;
-        allowUnusedLabels?: boolean;
-        allowUnreachableCode?: boolean;
-        noImplicitReturns?: boolean;
-        noFallthroughCasesInSwitch?: boolean;
-        forceConsistentCasingInFileNames?: boolean;
-        baseUrl?: string;
-        paths?: PathSubstitutions;
-        rootDirs?: RootPaths;
-        traceResolution?: boolean;
-        allowSyntheticDefaultImports?: boolean;
-        allowJs?: boolean;
-        noImplicitUseStrict?: boolean;
-        strictNullChecks?: boolean;
-        skipLibCheck?: boolean;
-        listEmittedFiles?: boolean;
-        lib?: string[];
-        types?: string[];
-        list?: string[];
-        [option: string]: CompilerOptionsValue | undefined;
-    }
-    interface TypingOptions {
-        enableAutoDiscovery?: boolean;
-        include?: string[];
-        exclude?: string[];
-        [option: string]: string[] | boolean | undefined;
-    }
-    interface DiscoverTypingsInfo {
-        fileNames: string[];
-        projectRootPath: string;
-        safeListPath: string;
-        packageNameToTypingLocation: Map<string>;
-        typingOptions: TypingOptions;
-        compilerOptions: CompilerOptions;
-    }
-    enum ModuleKind {
-        None = 0,
-        CommonJS = 1,
-        AMD = 2,
-        UMD = 3,
-        System = 4,
-        ES6 = 5,
-        ES2015 = 5,
-    }
-    enum JsxEmit {
-        None = 0,
-        Preserve = 1,
-        React = 2,
-    }
-    enum NewLineKind {
-        CarriageReturnLineFeed = 0,
-        LineFeed = 1,
-    }
-    interface LineAndCharacter {
-        line: number;
-        character: number;
-    }
-    enum ScriptKind {
-        Unknown = 0,
-        JS = 1,
-        JSX = 2,
-        TS = 3,
-        TSX = 4,
-    }
-    enum ScriptTarget {
-        ES3 = 0,
-        ES5 = 1,
-        ES6 = 2,
-        ES2015 = 2,
-        Latest = 2,
-    }
-    enum LanguageVariant {
-        Standard = 0,
-        JSX = 1,
-    }
-    interface ParsedCommandLine {
-        options: CompilerOptions;
-        typingOptions?: TypingOptions;
-        fileNames: string[];
-        raw?: any;
-        errors: Diagnostic[];
-    }
-    interface ModuleResolutionHost {
-        fileExists(fileName: string): boolean;
-        readFile(fileName: string): string;
-        trace?(s: string): void;
-        directoryExists?(directoryName: string): boolean;
-        realpath?(path: string): string;
-        getCurrentDirectory?(): string;
-    }
-    interface ResolvedModule {
-        resolvedFileName: string;
-        isExternalLibraryImport?: boolean;
-    }
-    interface ResolvedModuleWithFailedLookupLocations {
-        resolvedModule: ResolvedModule;
-        failedLookupLocations: string[];
-    }
-    interface ResolvedTypeReferenceDirective {
-        primary: boolean;
-        resolvedFileName?: string;
-    }
-    interface ResolvedTypeReferenceDirectiveWithFailedLookupLocations {
-        resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective;
-        failedLookupLocations: string[];
-    }
-    interface CompilerHost extends ModuleResolutionHost {
-        getSourceFile(fileName: string, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile;
-        getSourceFileByPath?(fileName: string, path: Path, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile;
-        getCancellationToken?(): CancellationToken;
-        getDefaultLibFileName(options: CompilerOptions): string;
-        getDefaultLibLocation?(): string;
-        getDefaultTypeDirectiveNames?(rootPath: string): string[];
-        writeFile: WriteFileCallback;
-        getCurrentDirectory(): string;
-        getCanonicalFileName(fileName: string): string;
-        useCaseSensitiveFileNames(): boolean;
-        getNewLine(): string;
-        resolveModuleNames?(moduleNames: string[], containingFile: string): ResolvedModule[];
-        /**
-         * This method is a companion for 'resolveModuleNames' and is used to resolve 'types' references to actual type declaration files
-         */
-        resolveTypeReferenceDirectives?(typeReferenceDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
-    }
-    interface TextSpan {
-        start: number;
-        length: number;
-    }
-    interface TextChangeRange {
-        span: TextSpan;
-        newLength: number;
-    }
-}
-declare namespace ts {
-    type FileWatcherCallback = (fileName: string, removed?: boolean) => void;
-    type DirectoryWatcherCallback = (directoryName: string) => void;
-    interface WatchedFile {
-        fileName: string;
-        callback: FileWatcherCallback;
-        mtime?: Date;
-    }
-    interface System {
-        args: string[];
-        newLine: string;
-        useCaseSensitiveFileNames: boolean;
-        write(s: string): void;
-        readFile(path: string, encoding?: string): string;
-        writeFile(path: string, data: string, writeByteOrderMark?: boolean): void;
-        watchFile?(path: string, callback: FileWatcherCallback): FileWatcher;
-        watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
-        resolvePath(path: string): string;
-        fileExists(path: string): boolean;
-        directoryExists(path: string): boolean;
-        createDirectory(path: string): void;
-        getExecutingFilePath(): string;
-        getCurrentDirectory(): string;
-        getDirectories(path: string): string[];
-        readDirectory(path: string, extension?: string, exclude?: string[]): string[];
-        getModifiedTime?(path: string): Date;
-        createHash?(data: string): string;
-        getMemoryUsage?(): number;
-        exit(exitCode?: number): void;
-        realpath?(path: string): string;
-    }
-    interface FileWatcher {
-        close(): void;
-    }
-    interface DirectoryWatcher extends FileWatcher {
-        directoryName: string;
-        referenceCount: number;
-    }
-    var sys: System;
-}
-declare namespace ts {
-    interface ErrorCallback {
-        (message: DiagnosticMessage, length: number): void;
-    }
-    interface Scanner {
-        getStartPos(): number;
-        getToken(): SyntaxKind;
-        getTextPos(): number;
-        getTokenPos(): number;
-        getTokenText(): string;
-        getTokenValue(): string;
-        hasExtendedUnicodeEscape(): boolean;
-        hasPrecedingLineBreak(): boolean;
-        isIdentifier(): boolean;
-        isReservedWord(): boolean;
-        isUnterminated(): boolean;
-        reScanGreaterToken(): SyntaxKind;
-        reScanSlashToken(): SyntaxKind;
-        reScanTemplateToken(): SyntaxKind;
-        scanJsxIdentifier(): SyntaxKind;
-        reScanJsxToken(): SyntaxKind;
-        scanJsxToken(): SyntaxKind;
-        scanJSDocToken(): SyntaxKind;
-        scan(): SyntaxKind;
-        setText(text: string, start?: number, length?: number): void;
-        setOnError(onError: ErrorCallback): void;
-        setScriptTarget(scriptTarget: ScriptTarget): void;
-        setLanguageVariant(variant: LanguageVariant): void;
-        setTextPos(textPos: number): void;
-        lookAhead<T>(callback: () => T): T;
-        scanRange<T>(start: number, length: number, callback: () => T): T;
-        tryScan<T>(callback: () => T): T;
-    }
-    function tokenToString(t: SyntaxKind): string;
-    function getPositionOfLineAndCharacter(sourceFile: SourceFile, line: number, character: number): number;
-    function getLineAndCharacterOfPosition(sourceFile: SourceFile, position: number): LineAndCharacter;
-    function isWhiteSpace(ch: number): boolean;
-    function isLineBreak(ch: number): boolean;
-    function couldStartTrivia(text: string, pos: number): boolean;
-    function getLeadingCommentRanges(text: string, pos: number): CommentRange[];
-    function getTrailingCommentRanges(text: string, pos: number): CommentRange[];
-    /** Optionally, get the shebang */
-    function getShebang(text: string): string;
-    function isIdentifierStart(ch: number, languageVersion: ScriptTarget): boolean;
-    function isIdentifierPart(ch: number, languageVersion: ScriptTarget): boolean;
-    function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, text?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
-}
-declare namespace ts {
-    function getDefaultLibFileName(options: CompilerOptions): string;
-    function textSpanEnd(span: TextSpan): number;
-    function textSpanIsEmpty(span: TextSpan): boolean;
-    function textSpanContainsPosition(span: TextSpan, position: number): boolean;
-    function textSpanContainsTextSpan(span: TextSpan, other: TextSpan): boolean;
-    function textSpanOverlapsWith(span: TextSpan, other: TextSpan): boolean;
-    function textSpanOverlap(span1: TextSpan, span2: TextSpan): TextSpan;
-    function textSpanIntersectsWithTextSpan(span: TextSpan, other: TextSpan): boolean;
-    function textSpanIntersectsWith(span: TextSpan, start: number, length: number): boolean;
-    function decodedTextSpanIntersectsWith(start1: number, length1: number, start2: number, length2: number): boolean;
-    function textSpanIntersectsWithPosition(span: TextSpan, position: number): boolean;
-    function textSpanIntersection(span1: TextSpan, span2: TextSpan): TextSpan;
-    function createTextSpan(start: number, length: number): TextSpan;
-    function createTextSpanFromBounds(start: number, end: number): TextSpan;
-    function textChangeRangeNewSpan(range: TextChangeRange): TextSpan;
-    function textChangeRangeIsUnchanged(range: TextChangeRange): boolean;
-    function createTextChangeRange(span: TextSpan, newLength: number): TextChangeRange;
-    let unchangedTextChangeRange: TextChangeRange;
-    /**
-     * Called to merge all the changes that occurred across several versions of a script snapshot
-     * into a single change.  i.e. if a user keeps making successive edits to a script we will
-     * have a text change from V1 to V2, V2 to V3, ..., Vn.
-     *
-     * This function will then merge those changes into a single change range valid between V1 and
-     * Vn.
-     */
-    function collapseTextChangeRangesAcrossMultipleVersions(changes: TextChangeRange[]): TextChangeRange;
-    function getTypeParameterOwner(d: Declaration): Declaration;
-    function isParameterPropertyDeclaration(node: ParameterDeclaration): boolean;
-    function startsWith(str: string, prefix: string): boolean;
-    function endsWith(str: string, suffix: string): boolean;
-}
-declare namespace ts {
-    function createNode(kind: SyntaxKind, pos?: number, end?: number): Node;
-    function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodeArray?: (nodes: Node[]) => T): T;
-    function createSourceFile(fileName: string, sourceText: string, languageVersion: ScriptTarget, setParentNodes?: boolean, scriptKind?: ScriptKind): SourceFile;
-    function isExternalModule(file: SourceFile): boolean;
-    function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
-}
-declare namespace ts {
-    const version: string;
-    function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean): string;
-    function resolveTripleslashReference(moduleName: string, containingFile: string): string;
-    /**
-     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
-     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
-     * is assumed to be the same as root directory of the project.
-     */
-    function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string, options: CompilerOptions, host: ModuleResolutionHost): ResolvedTypeReferenceDirectiveWithFailedLookupLocations;
-    function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-    function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-    function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
-    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
-    function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
-    function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
-    function getDefaultTypeDirectiveNames(options: CompilerOptions, rootFiles: string[], host: CompilerHost): string[];
-    function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program;
-}
-declare namespace ts {
-    /**
-      * Read tsconfig.json file
-      * @param fileName The path to the config file
-      */
-    function readConfigFile(fileName: string, readFile: (path: string) => string): {
-        config?: any;
-        error?: Diagnostic;
-    };
-    /**
-      * Parse the text of the tsconfig.json file
-      * @param fileName The path to the config file
-      * @param jsonText The text of the config file
-      */
-    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
-        config?: any;
-        error?: Diagnostic;
-    };
-    /**
-      * Parse the contents of a config file (tsconfig.json).
-      * @param json The contents of the config file to parse
-      * @param host Instance of ParseConfigHost used to enumerate files in folder.
-      * @param basePath A root directory to resolve relative path entries in the config
-      *    file to. e.g. outDir
-      */
-    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string): ParsedCommandLine;
-    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: CompilerOptions;
-        errors: Diagnostic[];
-    };
-    function convertTypingOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
-        options: CompilerOptions;
-        errors: Diagnostic[];
-    };
-}
-declare namespace ts {
-    /** The version of the language service API */
-    const servicesVersion: string;
-    interface Node {
-        getSourceFile(): SourceFile;
-        getChildCount(sourceFile?: SourceFile): number;
-        getChildAt(index: number, sourceFile?: SourceFile): Node;
-        getChildren(sourceFile?: SourceFile): Node[];
-        getStart(sourceFile?: SourceFile): number;
-        getFullStart(): number;
-        getEnd(): number;
-        getWidth(sourceFile?: SourceFile): number;
-        getFullWidth(): number;
-        getLeadingTriviaWidth(sourceFile?: SourceFile): number;
-        getFullText(sourceFile?: SourceFile): string;
-        getText(sourceFile?: SourceFile): string;
-        getFirstToken(sourceFile?: SourceFile): Node;
-        getLastToken(sourceFile?: SourceFile): Node;
-    }
-    interface Symbol {
-        getFlags(): SymbolFlags;
-        getName(): string;
-        getDeclarations(): Declaration[];
-        getDocumentationComment(): SymbolDisplayPart[];
-    }
-    interface Type {
-        getFlags(): TypeFlags;
-        getSymbol(): Symbol;
-        getProperties(): Symbol[];
-        getProperty(propertyName: string): Symbol;
-        getApparentProperties(): Symbol[];
-        getCallSignatures(): Signature[];
-        getConstructSignatures(): Signature[];
-        getStringIndexType(): Type;
-        getNumberIndexType(): Type;
-        getBaseTypes(): ObjectType[];
-        getNonNullableType(): Type;
-    }
-    interface Signature {
-        getDeclaration(): SignatureDeclaration;
-        getTypeParameters(): Type[];
-        getParameters(): Symbol[];
-        getReturnType(): Type;
-        getDocumentationComment(): SymbolDisplayPart[];
-    }
-    interface SourceFile {
-        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
-        getLineStarts(): number[];
-        getPositionOfLineAndCharacter(line: number, character: number): number;
-        update(newText: string, textChangeRange: TextChangeRange): SourceFile;
-    }
-    /**
-     * Represents an immutable snapshot of a script at a specified time.Once acquired, the
-     * snapshot is observably immutable. i.e. the same calls with the same parameters will return
-     * the same values.
-     */
-    interface IScriptSnapshot {
-        /** Gets a portion of the script snapshot specified by [start, end). */
-        getText(start: number, end: number): string;
-        /** Gets the length of this script snapshot. */
-        getLength(): number;
-        /**
-         * Gets the TextChangeRange that describe how the text changed between this text and
-         * an older version.  This information is used by the incremental parser to determine
-         * what sections of the script need to be re-parsed.  'undefined' can be returned if the
-         * change range cannot be determined.  However, in that case, incremental parsing will
-         * not happen and the entire document will be re - parsed.
-         */
-        getChangeRange(oldSnapshot: IScriptSnapshot): TextChangeRange;
-        /** Releases all resources held by this script snapshot */
-        dispose?(): void;
-    }
-    namespace ScriptSnapshot {
-        function fromString(text: string): IScriptSnapshot;
-    }
-    interface PreProcessedFileInfo {
-        referencedFiles: FileReference[];
-        typeReferenceDirectives: FileReference[];
-        importedFiles: FileReference[];
-        ambientExternalModules: string[];
-        isLibFile: boolean;
-    }
-    interface HostCancellationToken {
-        isCancellationRequested(): boolean;
-    }
-    interface LanguageServiceHost {
-        getCompilationSettings(): CompilerOptions;
-        getNewLine?(): string;
-        getProjectVersion?(): string;
-        getScriptFileNames(): string[];
-        getScriptKind?(fileName: string): ScriptKind;
-        getScriptVersion(fileName: string): string;
-        getScriptSnapshot(fileName: string): IScriptSnapshot | undefined;
-        getLocalizedDiagnosticMessages?(): any;
-        getCancellationToken?(): HostCancellationToken;
-        getCurrentDirectory(): string;
-        getDefaultLibFileName(options: CompilerOptions): string;
-        log?(s: string): void;
-        trace?(s: string): void;
-        error?(s: string): void;
-        useCaseSensitiveFileNames?(): boolean;
-        resolveModuleNames?(moduleNames: string[], containingFile: string): ResolvedModule[];
-        resolveTypeReferenceDirectives?(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
-        directoryExists?(directoryName: string): boolean;
-    }
-    interface LanguageService {
-        cleanupSemanticCache(): void;
-        getSyntacticDiagnostics(fileName: string): Diagnostic[];
-        getSemanticDiagnostics(fileName: string): Diagnostic[];
-        getCompilerOptionsDiagnostics(): Diagnostic[];
-        /**
-         * @deprecated Use getEncodedSyntacticClassifications instead.
-         */
-        getSyntacticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[];
-        /**
-         * @deprecated Use getEncodedSemanticClassifications instead.
-         */
-        getSemanticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[];
-        getEncodedSyntacticClassifications(fileName: string, span: TextSpan): Classifications;
-        getEncodedSemanticClassifications(fileName: string, span: TextSpan): Classifications;
-        getCompletionsAtPosition(fileName: string, position: number): CompletionInfo;
-        getCompletionEntryDetails(fileName: string, position: number, entryName: string): CompletionEntryDetails;
-        getQuickInfoAtPosition(fileName: string, position: number): QuickInfo;
-        getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): TextSpan;
-        getBreakpointStatementAtPosition(fileName: string, position: number): TextSpan;
-        getSignatureHelpItems(fileName: string, position: number): SignatureHelpItems;
-        getRenameInfo(fileName: string, position: number): RenameInfo;
-        findRenameLocations(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): RenameLocation[];
-        getDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[];
-        getTypeDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[];
-        getReferencesAtPosition(fileName: string, position: number): ReferenceEntry[];
-        findReferences(fileName: string, position: number): ReferencedSymbol[];
-        getDocumentHighlights(fileName: string, position: number, filesToSearch: string[]): DocumentHighlights[];
-        /** @deprecated */
-        getOccurrencesAtPosition(fileName: string, position: number): ReferenceEntry[];
-        getNavigateToItems(searchValue: string, maxResultCount?: number): NavigateToItem[];
-        getNavigationBarItems(fileName: string): NavigationBarItem[];
-        getOutliningSpans(fileName: string): OutliningSpan[];
-        getTodoComments(fileName: string, descriptors: TodoCommentDescriptor[]): TodoComment[];
-        getBraceMatchingAtPosition(fileName: string, position: number): TextSpan[];
-        getIndentationAtPosition(fileName: string, position: number, options: EditorOptions): number;
-        getFormattingEditsForRange(fileName: string, start: number, end: number, options: FormatCodeOptions): TextChange[];
-        getFormattingEditsForDocument(fileName: string, options: FormatCodeOptions): TextChange[];
-        getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: FormatCodeOptions): TextChange[];
-        getDocCommentTemplateAtPosition(fileName: string, position: number): TextInsertion;
-        isValidBraceCompletionAtPostion(fileName: string, position: number, openingBrace: number): boolean;
-        getEmitOutput(fileName: string): EmitOutput;
-        getProgram(): Program;
-        dispose(): void;
-    }
-    interface Classifications {
-        spans: number[];
-        endOfLineState: EndOfLineState;
-    }
-    interface ClassifiedSpan {
-        textSpan: TextSpan;
-        classificationType: string;
-    }
-    interface NavigationBarItem {
-        text: string;
-        kind: string;
-        kindModifiers: string;
-        spans: TextSpan[];
-        childItems: NavigationBarItem[];
-        indent: number;
-        bolded: boolean;
-        grayed: boolean;
-    }
-    interface TodoCommentDescriptor {
-        text: string;
-        priority: number;
-    }
-    interface TodoComment {
-        descriptor: TodoCommentDescriptor;
-        message: string;
-        position: number;
-    }
-    class TextChange {
-        span: TextSpan;
-        newText: string;
-    }
-    interface TextInsertion {
-        newText: string;
-        /** The position in newText the caret should point to after the insertion. */
-        caretOffset: number;
-    }
-    interface RenameLocation {
-        textSpan: TextSpan;
-        fileName: string;
-    }
-    interface ReferenceEntry {
-        textSpan: TextSpan;
-        fileName: string;
-        isWriteAccess: boolean;
-    }
-    interface DocumentHighlights {
-        fileName: string;
-        highlightSpans: HighlightSpan[];
-    }
-    namespace HighlightSpanKind {
-        const none: string;
-        const definition: string;
-        const reference: string;
-        const writtenReference: string;
-    }
-    interface HighlightSpan {
-        fileName?: string;
-        textSpan: TextSpan;
-        kind: string;
-    }
-    interface NavigateToItem {
-        name: string;
-        kind: string;
-        kindModifiers: string;
-        matchKind: string;
-        isCaseSensitive: boolean;
-        fileName: string;
-        textSpan: TextSpan;
-        containerName: string;
-        containerKind: string;
-    }
-    interface EditorOptions {
-        IndentSize: number;
-        TabSize: number;
-        NewLineCharacter: string;
-        ConvertTabsToSpaces: boolean;
-        IndentStyle: IndentStyle;
-    }
-    enum IndentStyle {
-        None = 0,
-        Block = 1,
-        Smart = 2,
-    }
-    interface FormatCodeOptions extends EditorOptions {
-        InsertSpaceAfterCommaDelimiter: boolean;
-        InsertSpaceAfterSemicolonInForStatements: boolean;
-        InsertSpaceBeforeAndAfterBinaryOperators: boolean;
-        InsertSpaceAfterKeywordsInControlFlowStatements: boolean;
-        InsertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
-        InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
-        InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: boolean;
-        InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
-        PlaceOpenBraceOnNewLineForFunctions: boolean;
-        PlaceOpenBraceOnNewLineForControlBlocks: boolean;
-        [s: string]: boolean | number | string;
-    }
-    interface DefinitionInfo {
-        fileName: string;
-        textSpan: TextSpan;
-        kind: string;
-        name: string;
-        containerKind: string;
-        containerName: string;
-    }
-    interface ReferencedSymbol {
-        definition: DefinitionInfo;
-        references: ReferenceEntry[];
-    }
-    enum SymbolDisplayPartKind {
-        aliasName = 0,
-        className = 1,
-        enumName = 2,
-        fieldName = 3,
-        interfaceName = 4,
-        keyword = 5,
-        lineBreak = 6,
-        numericLiteral = 7,
-        stringLiteral = 8,
-        localName = 9,
-        methodName = 10,
-        moduleName = 11,
-        operator = 12,
-        parameterName = 13,
-        propertyName = 14,
-        punctuation = 15,
-        space = 16,
-        text = 17,
-        typeParameterName = 18,
-        enumMemberName = 19,
-        functionName = 20,
-        regularExpressionLiteral = 21,
-    }
-    interface SymbolDisplayPart {
-        text: string;
-        kind: string;
-    }
-    interface QuickInfo {
-        kind: string;
-        kindModifiers: string;
-        textSpan: TextSpan;
-        displayParts: SymbolDisplayPart[];
-        documentation: SymbolDisplayPart[];
-    }
-    interface RenameInfo {
-        canRename: boolean;
-        localizedErrorMessage: string;
-        displayName: string;
-        fullDisplayName: string;
-        kind: string;
-        kindModifiers: string;
-        triggerSpan: TextSpan;
-    }
-    interface SignatureHelpParameter {
-        name: string;
-        documentation: SymbolDisplayPart[];
-        displayParts: SymbolDisplayPart[];
-        isOptional: boolean;
-    }
-    /**
-     * Represents a single signature to show in signature help.
-     * The id is used for subsequent calls into the language service to ask questions about the
-     * signature help item in the context of any documents that have been updated.  i.e. after
-     * an edit has happened, while signature help is still active, the host can ask important
-     * questions like 'what parameter is the user currently contained within?'.
-     */
-    interface SignatureHelpItem {
-        isVariadic: boolean;
-        prefixDisplayParts: SymbolDisplayPart[];
-        suffixDisplayParts: SymbolDisplayPart[];
-        separatorDisplayParts: SymbolDisplayPart[];
-        parameters: SignatureHelpParameter[];
-        documentation: SymbolDisplayPart[];
-    }
-    /**
-     * Represents a set of signature help items, and the preferred item that should be selected.
-     */
-    interface SignatureHelpItems {
-        items: SignatureHelpItem[];
-        applicableSpan: TextSpan;
-        selectedItemIndex: number;
-        argumentIndex: number;
-        argumentCount: number;
-    }
-    interface CompletionInfo {
-        isMemberCompletion: boolean;
-        isNewIdentifierLocation: boolean;
-        entries: CompletionEntry[];
-    }
-    interface CompletionEntry {
-        name: string;
-        kind: string;
-        kindModifiers: string;
-        sortText: string;
-    }
-    interface CompletionEntryDetails {
-        name: string;
-        kind: string;
-        kindModifiers: string;
-        displayParts: SymbolDisplayPart[];
-        documentation: SymbolDisplayPart[];
-    }
-    interface OutliningSpan {
-        /** The span of the document to actually collapse. */
-        textSpan: TextSpan;
-        /** The span of the document to display when the user hovers over the collapsed span. */
-        hintSpan: TextSpan;
-        /** The text to display in the editor for the collapsed region. */
-        bannerText: string;
-        /**
-          * Whether or not this region should be automatically collapsed when
-          * the 'Collapse to Definitions' command is invoked.
-          */
-        autoCollapse: boolean;
-    }
-    interface EmitOutput {
-        outputFiles: OutputFile[];
-        emitSkipped: boolean;
-    }
-    enum OutputFileType {
-        JavaScript = 0,
-        SourceMap = 1,
-        Declaration = 2,
-    }
-    interface OutputFile {
-        name: string;
-        writeByteOrderMark: boolean;
-        text: string;
-    }
-    enum EndOfLineState {
-        None = 0,
-        InMultiLineCommentTrivia = 1,
-        InSingleQuoteStringLiteral = 2,
-        InDoubleQuoteStringLiteral = 3,
-        InTemplateHeadOrNoSubstitutionTemplate = 4,
-        InTemplateMiddleOrTail = 5,
-        InTemplateSubstitutionPosition = 6,
-    }
-    enum TokenClass {
-        Punctuation = 0,
-        Keyword = 1,
-        Operator = 2,
-        Comment = 3,
-        Whitespace = 4,
-        Identifier = 5,
-        NumberLiteral = 6,
-        StringLiteral = 7,
-        RegExpLiteral = 8,
-    }
-    interface ClassificationResult {
-        finalLexState: EndOfLineState;
-        entries: ClassificationInfo[];
-    }
-    interface ClassificationInfo {
-        length: number;
-        classification: TokenClass;
-    }
-    interface Classifier {
-        /**
-         * Gives lexical classifications of tokens on a line without any syntactic context.
-         * For instance, a token consisting of the text 'string' can be either an identifier
-         * named 'string' or the keyword 'string', however, because this classifier is not aware,
-         * it relies on certain heuristics to give acceptable results. For classifications where
-         * speed trumps accuracy, this function is preferable; however, for true accuracy, the
-         * syntactic classifier is ideal. In fact, in certain editing scenarios, combining the
-         * lexical, syntactic, and semantic classifiers may issue the best user experience.
-         *
-         * @param text                      The text of a line to classify.
-         * @param lexState                  The state of the lexical classifier at the end of the previous line.
-         * @param syntacticClassifierAbsent Whether the client is *not* using a syntactic classifier.
-         *                                  If there is no syntactic classifier (syntacticClassifierAbsent=true),
-         *                                  certain heuristics may be used in its place; however, if there is a
-         *                                  syntactic classifier (syntacticClassifierAbsent=false), certain
-         *                                  classifications which may be incorrectly categorized will be given
-         *                                  back as Identifiers in order to allow the syntactic classifier to
-         *                                  subsume the classification.
-         * @deprecated Use getLexicalClassifications instead.
-         */
-        getClassificationsForLine(text: string, lexState: EndOfLineState, syntacticClassifierAbsent: boolean): ClassificationResult;
-        getEncodedLexicalClassifications(text: string, endOfLineState: EndOfLineState, syntacticClassifierAbsent: boolean): Classifications;
-    }
-    /**
-      * The document registry represents a store of SourceFile objects that can be shared between
-      * multiple LanguageService instances. A LanguageService instance holds on the SourceFile (AST)
-      * of files in the context.
-      * SourceFile objects account for most of the memory usage by the language service. Sharing
-      * the same DocumentRegistry instance between different instances of LanguageService allow
-      * for more efficient memory utilization since all projects will share at least the library
-      * file (lib.d.ts).
-      *
-      * A more advanced use of the document registry is to serialize sourceFile objects to disk
-      * and re-hydrate them when needed.
-      *
-      * To create a default DocumentRegistry, use createDocumentRegistry to create one, and pass it
-      * to all subsequent createLanguageService calls.
-      */
-    interface DocumentRegistry {
-        /**
-          * Request a stored SourceFile with a given fileName and compilationSettings.
-          * The first call to acquire will call createLanguageServiceSourceFile to generate
-          * the SourceFile if was not found in the registry.
-          *
-          * @param fileName The name of the file requested
-          * @param compilationSettings Some compilation settings like target affects the
-          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
-          * multiple copies of the same file for different compilation settings.
-          * @parm scriptSnapshot Text of the file. Only used if the file was not found
-          * in the registry and a new one was created.
-          * @parm version Current version of the file. Only used if the file was not found
-          * in the registry and a new one was created.
-          */
-        acquireDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
-        acquireDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
-        /**
-          * Request an updated version of an already existing SourceFile with a given fileName
-          * and compilationSettings. The update will in-turn call updateLanguageServiceSourceFile
-          * to get an updated SourceFile.
-          *
-          * @param fileName The name of the file requested
-          * @param compilationSettings Some compilation settings like target affects the
-          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
-          * multiple copies of the same file for different compilation settings.
-          * @param scriptSnapshot Text of the file.
-          * @param version Current version of the file.
-          */
-        updateDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
-        updateDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
-        getKeyForCompilationSettings(settings: CompilerOptions): DocumentRegistryBucketKey;
-        /**
-          * Informs the DocumentRegistry that a file is not needed any longer.
-          *
-          * Note: It is not allowed to call release on a SourceFile that was not acquired from
-          * this registry originally.
-          *
-          * @param fileName The name of the file to be released
-          * @param compilationSettings The compilation settings used to acquire the file
-          */
-        releaseDocument(fileName: string, compilationSettings: CompilerOptions): void;
-        releaseDocumentWithKey(path: Path, key: DocumentRegistryBucketKey): void;
-        reportStats(): string;
-    }
-    type DocumentRegistryBucketKey = string & {
-        __bucketKey: any;
-    };
-    namespace ScriptElementKind {
-        const unknown: string;
-        const warning: string;
-        /** predefined type (void) or keyword (class) */
-        const keyword: string;
-        /** top level script node */
-        const scriptElement: string;
-        /** module foo {} */
-        const moduleElement: string;
-        /** class X {} */
-        const classElement: string;
-        /** var x = class X {} */
-        const localClassElement: string;
-        /** interface Y {} */
-        const interfaceElement: string;
-        /** type T = ... */
-        const typeElement: string;
-        /** enum E */
-        const enumElement: string;
-        /**
-         * Inside module and script only
-         * const v = ..
-         */
-        const variableElement: string;
-        /** Inside function */
-        const localVariableElement: string;
-        /**
-         * Inside module and script only
-         * function f() { }
-         */
-        const functionElement: string;
-        /** Inside function */
-        const localFunctionElement: string;
-        /** class X { [public|private]* foo() {} } */
-        const memberFunctionElement: string;
-        /** class X { [public|private]* [get|set] foo:number; } */
-        const memberGetAccessorElement: string;
-        const memberSetAccessorElement: string;
-        /**
-         * class X { [public|private]* foo:number; }
-         * interface Y { foo:number; }
-         */
-        const memberVariableElement: string;
-        /** class X { constructor() { } } */
-        const constructorImplementationElement: string;
-        /** interface Y { ():number; } */
-        const callSignatureElement: string;
-        /** interface Y { []:number; } */
-        const indexSignatureElement: string;
-        /** interface Y { new():Y; } */
-        const constructSignatureElement: string;
-        /** function foo(*Y*: string) */
-        const parameterElement: string;
-        const typeParameterElement: string;
-        const primitiveType: string;
-        const label: string;
-        const alias: string;
-        const constElement: string;
-        const letElement: string;
-    }
-    namespace ScriptElementKindModifier {
-        const none: string;
-        const publicMemberModifier: string;
-        const privateMemberModifier: string;
-        const protectedMemberModifier: string;
-        const exportedModifier: string;
-        const ambientModifier: string;
-        const staticModifier: string;
-        const abstractModifier: string;
-    }
-    class ClassificationTypeNames {
-        static comment: string;
-        static identifier: string;
-        static keyword: string;
-        static numericLiteral: string;
-        static operator: string;
-        static stringLiteral: string;
-        static whiteSpace: string;
-        static text: string;
-        static punctuation: string;
-        static className: string;
-        static enumName: string;
-        static interfaceName: string;
-        static moduleName: string;
-        static typeParameterName: string;
-        static typeAliasName: string;
-        static parameterName: string;
-        static docCommentTagName: string;
-        static jsxOpenTagName: string;
-        static jsxCloseTagName: string;
-        static jsxSelfClosingTagName: string;
-        static jsxAttribute: string;
-        static jsxText: string;
-        static jsxAttributeStringLiteralValue: string;
-    }
-    enum ClassificationType {
-        comment = 1,
-        identifier = 2,
-        keyword = 3,
-        numericLiteral = 4,
-        operator = 5,
-        stringLiteral = 6,
-        regularExpressionLiteral = 7,
-        whiteSpace = 8,
-        text = 9,
-        punctuation = 10,
-        className = 11,
-        enumName = 12,
-        interfaceName = 13,
-        moduleName = 14,
-        typeParameterName = 15,
-        typeAliasName = 16,
-        parameterName = 17,
-        docCommentTagName = 18,
-        jsxOpenTagName = 19,
-        jsxCloseTagName = 20,
-        jsxSelfClosingTagName = 21,
-        jsxAttribute = 22,
-        jsxText = 23,
-        jsxAttributeStringLiteralValue = 24,
-    }
-    interface DisplayPartsSymbolWriter extends SymbolWriter {
-        displayParts(): SymbolDisplayPart[];
-    }
-    function displayPartsToString(displayParts: SymbolDisplayPart[]): string;
-    function getDefaultCompilerOptions(): CompilerOptions;
-    interface TranspileOptions {
-        compilerOptions?: CompilerOptions;
-        fileName?: string;
-        reportDiagnostics?: boolean;
-        moduleName?: string;
-        renamedDependencies?: Map<string>;
-    }
-    interface TranspileOutput {
-        outputText: string;
-        diagnostics?: Diagnostic[];
-        sourceMapText?: string;
-    }
-    function transpileModule(input: string, transpileOptions: TranspileOptions): TranspileOutput;
-    function transpile(input: string, compilerOptions?: CompilerOptions, fileName?: string, diagnostics?: Diagnostic[], moduleName?: string): string;
-    function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTarget: ScriptTarget, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile;
-    let disableIncrementalParsing: boolean;
-    function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
-    function createDocumentRegistry(useCaseSensitiveFileNames?: boolean, currentDirectory?: string): DocumentRegistry;
-    function preProcessFile(sourceText: string, readImportFiles?: boolean, detectJavaScriptImports?: boolean): PreProcessedFileInfo;
-    function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry): LanguageService;
-    function createClassifier(): Classifier;
-    /**
-      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
-      * node package.
-      * The functionality is not supported if the ts module is consumed outside of a node module.
-      */
-    function getDefaultLibFilePath(options: CompilerOptions): string;
-}
+declare namespace ts {
+    interface Map<T> {
+        [index: string]: T;
+    }
+    type Path = string & {
+        __pathBrand: any;
+    };
+    interface FileMap<T> {
+        get(fileName: Path): T;
+        set(fileName: Path, value: T): void;
+        contains(fileName: Path): boolean;
+        remove(fileName: Path): void;
+        forEachValue(f: (key: Path, v: T) => void): void;
+        clear(): void;
+    }
+    interface TextRange {
+        pos: number;
+        end: number;
+    }
+    enum SyntaxKind {
+        Unknown = 0,
+        EndOfFileToken = 1,
+        SingleLineCommentTrivia = 2,
+        MultiLineCommentTrivia = 3,
+        NewLineTrivia = 4,
+        WhitespaceTrivia = 5,
+        ShebangTrivia = 6,
+        ConflictMarkerTrivia = 7,
+        NumericLiteral = 8,
+        StringLiteral = 9,
+        RegularExpressionLiteral = 10,
+        NoSubstitutionTemplateLiteral = 11,
+        TemplateHead = 12,
+        TemplateMiddle = 13,
+        TemplateTail = 14,
+        OpenBraceToken = 15,
+        CloseBraceToken = 16,
+        OpenParenToken = 17,
+        CloseParenToken = 18,
+        OpenBracketToken = 19,
+        CloseBracketToken = 20,
+        DotToken = 21,
+        DotDotDotToken = 22,
+        SemicolonToken = 23,
+        CommaToken = 24,
+        LessThanToken = 25,
+        LessThanSlashToken = 26,
+        GreaterThanToken = 27,
+        LessThanEqualsToken = 28,
+        GreaterThanEqualsToken = 29,
+        EqualsEqualsToken = 30,
+        ExclamationEqualsToken = 31,
+        EqualsEqualsEqualsToken = 32,
+        ExclamationEqualsEqualsToken = 33,
+        EqualsGreaterThanToken = 34,
+        PlusToken = 35,
+        MinusToken = 36,
+        AsteriskToken = 37,
+        AsteriskAsteriskToken = 38,
+        SlashToken = 39,
+        PercentToken = 40,
+        PlusPlusToken = 41,
+        MinusMinusToken = 42,
+        LessThanLessThanToken = 43,
+        GreaterThanGreaterThanToken = 44,
+        GreaterThanGreaterThanGreaterThanToken = 45,
+        AmpersandToken = 46,
+        BarToken = 47,
+        CaretToken = 48,
+        ExclamationToken = 49,
+        TildeToken = 50,
+        AmpersandAmpersandToken = 51,
+        BarBarToken = 52,
+        QuestionToken = 53,
+        ColonToken = 54,
+        AtToken = 55,
+        EqualsToken = 56,
+        PlusEqualsToken = 57,
+        MinusEqualsToken = 58,
+        AsteriskEqualsToken = 59,
+        AsteriskAsteriskEqualsToken = 60,
+        SlashEqualsToken = 61,
+        PercentEqualsToken = 62,
+        LessThanLessThanEqualsToken = 63,
+        GreaterThanGreaterThanEqualsToken = 64,
+        GreaterThanGreaterThanGreaterThanEqualsToken = 65,
+        AmpersandEqualsToken = 66,
+        BarEqualsToken = 67,
+        CaretEqualsToken = 68,
+        Identifier = 69,
+        BreakKeyword = 70,
+        CaseKeyword = 71,
+        CatchKeyword = 72,
+        ClassKeyword = 73,
+        ConstKeyword = 74,
+        ContinueKeyword = 75,
+        DebuggerKeyword = 76,
+        DefaultKeyword = 77,
+        DeleteKeyword = 78,
+        DoKeyword = 79,
+        ElseKeyword = 80,
+        EnumKeyword = 81,
+        ExportKeyword = 82,
+        ExtendsKeyword = 83,
+        FalseKeyword = 84,
+        FinallyKeyword = 85,
+        ForKeyword = 86,
+        FunctionKeyword = 87,
+        IfKeyword = 88,
+        ImportKeyword = 89,
+        InKeyword = 90,
+        InstanceOfKeyword = 91,
+        NewKeyword = 92,
+        NullKeyword = 93,
+        ReturnKeyword = 94,
+        SuperKeyword = 95,
+        SwitchKeyword = 96,
+        ThisKeyword = 97,
+        ThrowKeyword = 98,
+        TrueKeyword = 99,
+        TryKeyword = 100,
+        TypeOfKeyword = 101,
+        VarKeyword = 102,
+        VoidKeyword = 103,
+        WhileKeyword = 104,
+        WithKeyword = 105,
+        ImplementsKeyword = 106,
+        InterfaceKeyword = 107,
+        LetKeyword = 108,
+        PackageKeyword = 109,
+        PrivateKeyword = 110,
+        ProtectedKeyword = 111,
+        PublicKeyword = 112,
+        StaticKeyword = 113,
+        YieldKeyword = 114,
+        AbstractKeyword = 115,
+        AsKeyword = 116,
+        AnyKeyword = 117,
+        AsyncKeyword = 118,
+        AwaitKeyword = 119,
+        BooleanKeyword = 120,
+        ConstructorKeyword = 121,
+        DeclareKeyword = 122,
+        GetKeyword = 123,
+        IsKeyword = 124,
+        ModuleKeyword = 125,
+        NamespaceKeyword = 126,
+        NeverKeyword = 127,
+        ReadonlyKeyword = 128,
+        RequireKeyword = 129,
+        NumberKeyword = 130,
+        SetKeyword = 131,
+        StringKeyword = 132,
+        SymbolKeyword = 133,
+        TypeKeyword = 134,
+        UndefinedKeyword = 135,
+        FromKeyword = 136,
+        GlobalKeyword = 137,
+        OfKeyword = 138,
+        QualifiedName = 139,
+        ComputedPropertyName = 140,
+        TypeParameter = 141,
+        Parameter = 142,
+        Decorator = 143,
+        PropertySignature = 144,
+        PropertyDeclaration = 145,
+        MethodSignature = 146,
+        MethodDeclaration = 147,
+        Constructor = 148,
+        GetAccessor = 149,
+        SetAccessor = 150,
+        CallSignature = 151,
+        ConstructSignature = 152,
+        IndexSignature = 153,
+        TypePredicate = 154,
+        TypeReference = 155,
+        FunctionType = 156,
+        ConstructorType = 157,
+        TypeQuery = 158,
+        TypeLiteral = 159,
+        ArrayType = 160,
+        TupleType = 161,
+        UnionType = 162,
+        IntersectionType = 163,
+        ParenthesizedType = 164,
+        ThisType = 165,
+        StringLiteralType = 166,
+        ObjectBindingPattern = 167,
+        ArrayBindingPattern = 168,
+        BindingElement = 169,
+        ArrayLiteralExpression = 170,
+        ObjectLiteralExpression = 171,
+        PropertyAccessExpression = 172,
+        ElementAccessExpression = 173,
+        CallExpression = 174,
+        NewExpression = 175,
+        TaggedTemplateExpression = 176,
+        TypeAssertionExpression = 177,
+        ParenthesizedExpression = 178,
+        FunctionExpression = 179,
+        ArrowFunction = 180,
+        DeleteExpression = 181,
+        TypeOfExpression = 182,
+        VoidExpression = 183,
+        AwaitExpression = 184,
+        PrefixUnaryExpression = 185,
+        PostfixUnaryExpression = 186,
+        BinaryExpression = 187,
+        ConditionalExpression = 188,
+        TemplateExpression = 189,
+        YieldExpression = 190,
+        SpreadElementExpression = 191,
+        ClassExpression = 192,
+        OmittedExpression = 193,
+        ExpressionWithTypeArguments = 194,
+        AsExpression = 195,
+        NonNullExpression = 196,
+        TemplateSpan = 197,
+        SemicolonClassElement = 198,
+        Block = 199,
+        VariableStatement = 200,
+        EmptyStatement = 201,
+        ExpressionStatement = 202,
+        IfStatement = 203,
+        DoStatement = 204,
+        WhileStatement = 205,
+        ForStatement = 206,
+        ForInStatement = 207,
+        ForOfStatement = 208,
+        ContinueStatement = 209,
+        BreakStatement = 210,
+        ReturnStatement = 211,
+        WithStatement = 212,
+        SwitchStatement = 213,
+        LabeledStatement = 214,
+        ThrowStatement = 215,
+        TryStatement = 216,
+        DebuggerStatement = 217,
+        VariableDeclaration = 218,
+        VariableDeclarationList = 219,
+        FunctionDeclaration = 220,
+        ClassDeclaration = 221,
+        InterfaceDeclaration = 222,
+        TypeAliasDeclaration = 223,
+        EnumDeclaration = 224,
+        ModuleDeclaration = 225,
+        ModuleBlock = 226,
+        CaseBlock = 227,
+        NamespaceExportDeclaration = 228,
+        ImportEqualsDeclaration = 229,
+        ImportDeclaration = 230,
+        ImportClause = 231,
+        NamespaceImport = 232,
+        NamedImports = 233,
+        ImportSpecifier = 234,
+        ExportAssignment = 235,
+        ExportDeclaration = 236,
+        NamedExports = 237,
+        ExportSpecifier = 238,
+        MissingDeclaration = 239,
+        ExternalModuleReference = 240,
+        JsxElement = 241,
+        JsxSelfClosingElement = 242,
+        JsxOpeningElement = 243,
+        JsxText = 244,
+        JsxClosingElement = 245,
+        JsxAttribute = 246,
+        JsxSpreadAttribute = 247,
+        JsxExpression = 248,
+        CaseClause = 249,
+        DefaultClause = 250,
+        HeritageClause = 251,
+        CatchClause = 252,
+        PropertyAssignment = 253,
+        ShorthandPropertyAssignment = 254,
+        EnumMember = 255,
+        SourceFile = 256,
+        JSDocTypeExpression = 257,
+        JSDocAllType = 258,
+        JSDocUnknownType = 259,
+        JSDocArrayType = 260,
+        JSDocUnionType = 261,
+        JSDocTupleType = 262,
+        JSDocNullableType = 263,
+        JSDocNonNullableType = 264,
+        JSDocRecordType = 265,
+        JSDocRecordMember = 266,
+        JSDocTypeReference = 267,
+        JSDocOptionalType = 268,
+        JSDocFunctionType = 269,
+        JSDocVariadicType = 270,
+        JSDocConstructorType = 271,
+        JSDocThisType = 272,
+        JSDocComment = 273,
+        JSDocTag = 274,
+        JSDocParameterTag = 275,
+        JSDocReturnTag = 276,
+        JSDocTypeTag = 277,
+        JSDocTemplateTag = 278,
+        JSDocTypedefTag = 279,
+        JSDocPropertyTag = 280,
+        JSDocTypeLiteral = 281,
+        SyntaxList = 282,
+        Count = 283,
+        FirstAssignment = 56,
+        LastAssignment = 68,
+        FirstReservedWord = 70,
+        LastReservedWord = 105,
+        FirstKeyword = 70,
+        LastKeyword = 138,
+        FirstFutureReservedWord = 106,
+        LastFutureReservedWord = 114,
+        FirstTypeNode = 154,
+        LastTypeNode = 166,
+        FirstPunctuation = 15,
+        LastPunctuation = 68,
+        FirstToken = 0,
+        LastToken = 138,
+        FirstTriviaToken = 2,
+        LastTriviaToken = 7,
+        FirstLiteralToken = 8,
+        LastLiteralToken = 11,
+        FirstTemplateToken = 11,
+        LastTemplateToken = 14,
+        FirstBinaryOperator = 25,
+        LastBinaryOperator = 68,
+        FirstNode = 139,
+        FirstJSDocNode = 257,
+        LastJSDocNode = 281,
+        FirstJSDocTagNode = 273,
+        LastJSDocTagNode = 281,
+    }
+    enum NodeFlags {
+        None = 0,
+        Export = 1,
+        Ambient = 2,
+        Public = 4,
+        Private = 8,
+        Protected = 16,
+        Static = 32,
+        Readonly = 64,
+        Abstract = 128,
+        Async = 256,
+        Default = 512,
+        Let = 1024,
+        Const = 2048,
+        Namespace = 4096,
+        ExportContext = 8192,
+        ContainsThis = 16384,
+        HasImplicitReturn = 32768,
+        HasExplicitReturn = 65536,
+        GlobalAugmentation = 131072,
+        HasClassExtends = 262144,
+        HasDecorators = 524288,
+        HasParamDecorators = 1048576,
+        HasAsyncFunctions = 2097152,
+        DisallowInContext = 4194304,
+        YieldContext = 8388608,
+        DecoratorContext = 16777216,
+        AwaitContext = 33554432,
+        ThisNodeHasError = 67108864,
+        JavaScriptFile = 134217728,
+        ThisNodeOrAnySubNodesHasError = 268435456,
+        HasAggregatedChildData = 536870912,
+        HasJsxSpreadAttribute = 1073741824,
+        Modifier = 1023,
+        AccessibilityModifier = 28,
+        ParameterPropertyModifier = 92,
+        BlockScoped = 3072,
+        ReachabilityCheckFlags = 98304,
+        EmitHelperFlags = 3932160,
+        ReachabilityAndEmitFlags = 4030464,
+        ContextFlags = 197132288,
+        TypeExcludesFlags = 41943040,
+    }
+    enum JsxFlags {
+        None = 0,
+        /** An element from a named property of the JSX.IntrinsicElements interface */
+        IntrinsicNamedElement = 1,
+        /** An element inferred from the string index signature of the JSX.IntrinsicElements interface */
+        IntrinsicIndexedElement = 2,
+        IntrinsicElement = 3,
+    }
+    interface Node extends TextRange {
+        kind: SyntaxKind;
+        flags: NodeFlags;
+        decorators?: NodeArray<Decorator>;
+        modifiers?: ModifiersArray;
+        parent?: Node;
+    }
+    interface NodeArray<T> extends Array<T>, TextRange {
+        hasTrailingComma?: boolean;
+    }
+    interface ModifiersArray extends NodeArray<Modifier> {
+        flags: number;
+    }
+    interface Modifier extends Node {
+    }
+    interface Identifier extends PrimaryExpression {
+        text: string;
+        originalKeywordKind?: SyntaxKind;
+    }
+    interface QualifiedName extends Node {
+        left: EntityName;
+        right: Identifier;
+    }
+    type EntityName = Identifier | QualifiedName;
+    type PropertyName = Identifier | LiteralExpression | ComputedPropertyName;
+    type DeclarationName = Identifier | LiteralExpression | ComputedPropertyName | BindingPattern;
+    interface Declaration extends Node {
+        _declarationBrand: any;
+        name?: DeclarationName;
+    }
+    interface DeclarationStatement extends Declaration, Statement {
+        name?: Identifier;
+    }
+    interface ComputedPropertyName extends Node {
+        expression: Expression;
+    }
+    interface Decorator extends Node {
+        expression: LeftHandSideExpression;
+    }
+    interface TypeParameterDeclaration extends Declaration {
+        name: Identifier;
+        constraint?: TypeNode;
+        expression?: Expression;
+    }
+    interface SignatureDeclaration extends Declaration {
+        name?: PropertyName;
+        typeParameters?: NodeArray<TypeParameterDeclaration>;
+        parameters: NodeArray<ParameterDeclaration>;
+        type?: TypeNode;
+    }
+    interface CallSignatureDeclaration extends SignatureDeclaration, TypeElement {
+    }
+    interface ConstructSignatureDeclaration extends SignatureDeclaration, TypeElement {
+    }
+    interface VariableDeclaration extends Declaration {
+        parent?: VariableDeclarationList;
+        name: Identifier | BindingPattern;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface VariableDeclarationList extends Node {
+        declarations: NodeArray<VariableDeclaration>;
+    }
+    interface ParameterDeclaration extends Declaration {
+        dotDotDotToken?: Node;
+        name: Identifier | BindingPattern;
+        questionToken?: Node;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface BindingElement extends Declaration {
+        propertyName?: PropertyName;
+        dotDotDotToken?: Node;
+        name: Identifier | BindingPattern;
+        initializer?: Expression;
+    }
+    interface PropertySignature extends TypeElement {
+        name: PropertyName;
+        questionToken?: Node;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface PropertyDeclaration extends ClassElement {
+        questionToken?: Node;
+        name: PropertyName;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface ObjectLiteralElement extends Declaration {
+        _objectLiteralBrandBrand: any;
+        name?: PropertyName;
+    }
+    interface PropertyAssignment extends ObjectLiteralElement {
+        _propertyAssignmentBrand: any;
+        name: PropertyName;
+        questionToken?: Node;
+        initializer: Expression;
+    }
+    interface ShorthandPropertyAssignment extends ObjectLiteralElement {
+        name: Identifier;
+        questionToken?: Node;
+        equalsToken?: Node;
+        objectAssignmentInitializer?: Expression;
+    }
+    interface VariableLikeDeclaration extends Declaration {
+        propertyName?: PropertyName;
+        dotDotDotToken?: Node;
+        name: DeclarationName;
+        questionToken?: Node;
+        type?: TypeNode;
+        initializer?: Expression;
+    }
+    interface PropertyLikeDeclaration extends Declaration {
+        name: PropertyName;
+    }
+    interface BindingPattern extends Node {
+        elements: NodeArray<BindingElement>;
+    }
+    interface ObjectBindingPattern extends BindingPattern {
+    }
+    interface ArrayBindingPattern extends BindingPattern {
+    }
+    /**
+     * Several node kinds share function-like features such as a signature,
+     * a name, and a body. These nodes should extend FunctionLikeDeclaration.
+     * Examples:
+     * - FunctionDeclaration
+     * - MethodDeclaration
+     * - AccessorDeclaration
+     */
+    interface FunctionLikeDeclaration extends SignatureDeclaration {
+        _functionLikeDeclarationBrand: any;
+        asteriskToken?: Node;
+        questionToken?: Node;
+        body?: Block | Expression;
+    }
+    interface FunctionDeclaration extends FunctionLikeDeclaration, DeclarationStatement {
+        name?: Identifier;
+        body?: FunctionBody;
+    }
+    interface MethodSignature extends SignatureDeclaration, TypeElement {
+        name: PropertyName;
+    }
+    interface MethodDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        name: PropertyName;
+        body?: FunctionBody;
+    }
+    interface ConstructorDeclaration extends FunctionLikeDeclaration, ClassElement {
+        body?: FunctionBody;
+    }
+    interface SemicolonClassElement extends ClassElement {
+        _semicolonClassElementBrand: any;
+    }
+    interface AccessorDeclaration extends FunctionLikeDeclaration, ClassElement, ObjectLiteralElement {
+        _accessorDeclarationBrand: any;
+        name: PropertyName;
+        body: FunctionBody;
+    }
+    interface GetAccessorDeclaration extends AccessorDeclaration {
+    }
+    interface SetAccessorDeclaration extends AccessorDeclaration {
+    }
+    interface IndexSignatureDeclaration extends SignatureDeclaration, ClassElement, TypeElement {
+        _indexSignatureDeclarationBrand: any;
+    }
+    interface TypeNode extends Node {
+        _typeNodeBrand: any;
+    }
+    interface ThisTypeNode extends TypeNode {
+        _thisTypeNodeBrand: any;
+    }
+    interface FunctionOrConstructorTypeNode extends TypeNode, SignatureDeclaration {
+        _functionOrConstructorTypeNodeBrand: any;
+    }
+    interface FunctionTypeNode extends FunctionOrConstructorTypeNode {
+    }
+    interface ConstructorTypeNode extends FunctionOrConstructorTypeNode {
+    }
+    interface TypeReferenceNode extends TypeNode {
+        typeName: EntityName;
+        typeArguments?: NodeArray<TypeNode>;
+    }
+    interface TypePredicateNode extends TypeNode {
+        parameterName: Identifier | ThisTypeNode;
+        type: TypeNode;
+    }
+    interface TypeQueryNode extends TypeNode {
+        exprName: EntityName;
+    }
+    interface TypeLiteralNode extends TypeNode, Declaration {
+        members: NodeArray<TypeElement>;
+    }
+    interface ArrayTypeNode extends TypeNode {
+        elementType: TypeNode;
+    }
+    interface TupleTypeNode extends TypeNode {
+        elementTypes: NodeArray<TypeNode>;
+    }
+    interface UnionOrIntersectionTypeNode extends TypeNode {
+        types: NodeArray<TypeNode>;
+    }
+    interface UnionTypeNode extends UnionOrIntersectionTypeNode {
+    }
+    interface IntersectionTypeNode extends UnionOrIntersectionTypeNode {
+    }
+    interface ParenthesizedTypeNode extends TypeNode {
+        type: TypeNode;
+    }
+    interface StringLiteralTypeNode extends LiteralLikeNode, TypeNode {
+        _stringLiteralTypeBrand: any;
+    }
+    interface StringLiteral extends LiteralExpression {
+        _stringLiteralBrand: any;
+    }
+    interface Expression extends Node {
+        _expressionBrand: any;
+        contextualType?: Type;
+    }
+    interface OmittedExpression extends Expression {
+    }
+    interface UnaryExpression extends Expression {
+        _unaryExpressionBrand: any;
+    }
+    interface IncrementExpression extends UnaryExpression {
+        _incrementExpressionBrand: any;
+    }
+    interface PrefixUnaryExpression extends IncrementExpression {
+        operator: SyntaxKind;
+        operand: UnaryExpression;
+    }
+    interface PostfixUnaryExpression extends IncrementExpression {
+        operand: LeftHandSideExpression;
+        operator: SyntaxKind;
+    }
+    interface PostfixExpression extends UnaryExpression {
+        _postfixExpressionBrand: any;
+    }
+    interface LeftHandSideExpression extends IncrementExpression {
+        _leftHandSideExpressionBrand: any;
+    }
+    interface MemberExpression extends LeftHandSideExpression {
+        _memberExpressionBrand: any;
+    }
+    interface PrimaryExpression extends MemberExpression {
+        _primaryExpressionBrand: any;
+    }
+    interface DeleteExpression extends UnaryExpression {
+        expression: UnaryExpression;
+    }
+    interface TypeOfExpression extends UnaryExpression {
+        expression: UnaryExpression;
+    }
+    interface VoidExpression extends UnaryExpression {
+        expression: UnaryExpression;
+    }
+    interface AwaitExpression extends UnaryExpression {
+        expression: UnaryExpression;
+    }
+    interface YieldExpression extends Expression {
+        asteriskToken?: Node;
+        expression?: Expression;
+    }
+    interface BinaryExpression extends Expression, Declaration {
+        left: Expression;
+        operatorToken: Node;
+        right: Expression;
+    }
+    interface ConditionalExpression extends Expression {
+        condition: Expression;
+        questionToken: Node;
+        whenTrue: Expression;
+        colonToken: Node;
+        whenFalse: Expression;
+    }
+    type FunctionBody = Block;
+    type ConciseBody = FunctionBody | Expression;
+    interface FunctionExpression extends PrimaryExpression, FunctionLikeDeclaration {
+        name?: Identifier;
+        body: FunctionBody;
+    }
+    interface ArrowFunction extends Expression, FunctionLikeDeclaration {
+        equalsGreaterThanToken: Node;
+        body: ConciseBody;
+    }
+    interface LiteralLikeNode extends Node {
+        text: string;
+        isUnterminated?: boolean;
+        hasExtendedUnicodeEscape?: boolean;
+    }
+    interface LiteralExpression extends LiteralLikeNode, PrimaryExpression {
+        _literalExpressionBrand: any;
+    }
+    interface TemplateLiteralFragment extends LiteralLikeNode {
+        _templateLiteralFragmentBrand: any;
+    }
+    interface TemplateExpression extends PrimaryExpression {
+        head: TemplateLiteralFragment;
+        templateSpans: NodeArray<TemplateSpan>;
+    }
+    interface TemplateSpan extends Node {
+        expression: Expression;
+        literal: TemplateLiteralFragment;
+    }
+    interface ParenthesizedExpression extends PrimaryExpression {
+        expression: Expression;
+    }
+    interface ArrayLiteralExpression extends PrimaryExpression {
+        elements: NodeArray<Expression>;
+    }
+    interface SpreadElementExpression extends Expression {
+        expression: Expression;
+    }
+    interface ObjectLiteralExpression extends PrimaryExpression, Declaration {
+        properties: NodeArray<ObjectLiteralElement>;
+    }
+    interface PropertyAccessExpression extends MemberExpression, Declaration {
+        expression: LeftHandSideExpression;
+        dotToken: Node;
+        name: Identifier;
+    }
+    type IdentifierOrPropertyAccess = Identifier | PropertyAccessExpression;
+    interface ElementAccessExpression extends MemberExpression {
+        expression: LeftHandSideExpression;
+        argumentExpression?: Expression;
+    }
+    interface CallExpression extends LeftHandSideExpression, Declaration {
+        expression: LeftHandSideExpression;
+        typeArguments?: NodeArray<TypeNode>;
+        arguments: NodeArray<Expression>;
+    }
+    interface ExpressionWithTypeArguments extends TypeNode {
+        expression: LeftHandSideExpression;
+        typeArguments?: NodeArray<TypeNode>;
+    }
+    interface NewExpression extends CallExpression, PrimaryExpression {
+    }
+    interface TaggedTemplateExpression extends MemberExpression {
+        tag: LeftHandSideExpression;
+        template: LiteralExpression | TemplateExpression;
+    }
+    type CallLikeExpression = CallExpression | NewExpression | TaggedTemplateExpression | Decorator;
+    interface AsExpression extends Expression {
+        expression: Expression;
+        type: TypeNode;
+    }
+    interface TypeAssertion extends UnaryExpression {
+        type: TypeNode;
+        expression: UnaryExpression;
+    }
+    type AssertionExpression = TypeAssertion | AsExpression;
+    interface NonNullExpression extends LeftHandSideExpression {
+        expression: Expression;
+    }
+    interface JsxElement extends PrimaryExpression {
+        openingElement: JsxOpeningElement;
+        children: NodeArray<JsxChild>;
+        closingElement: JsxClosingElement;
+    }
+    interface JsxOpeningElement extends Expression {
+        _openingElementBrand?: any;
+        tagName: EntityName;
+        attributes: NodeArray<JsxAttribute | JsxSpreadAttribute>;
+    }
+    interface JsxSelfClosingElement extends PrimaryExpression, JsxOpeningElement {
+        _selfClosingElementBrand?: any;
+    }
+    type JsxOpeningLikeElement = JsxSelfClosingElement | JsxOpeningElement;
+    interface JsxAttribute extends Node {
+        name: Identifier;
+        initializer?: Expression;
+    }
+    interface JsxSpreadAttribute extends Node {
+        expression: Expression;
+    }
+    interface JsxClosingElement extends Node {
+        tagName: EntityName;
+    }
+    interface JsxExpression extends Expression {
+        expression?: Expression;
+    }
+    interface JsxText extends Node {
+        _jsxTextExpressionBrand: any;
+    }
+    type JsxChild = JsxText | JsxExpression | JsxElement | JsxSelfClosingElement;
+    interface Statement extends Node {
+        _statementBrand: any;
+    }
+    interface EmptyStatement extends Statement {
+    }
+    interface DebuggerStatement extends Statement {
+    }
+    interface MissingDeclaration extends DeclarationStatement, ClassElement, ObjectLiteralElement, TypeElement {
+        name?: Identifier;
+    }
+    type BlockLike = SourceFile | Block | ModuleBlock | CaseClause;
+    interface Block extends Statement {
+        statements: NodeArray<Statement>;
+    }
+    interface VariableStatement extends Statement {
+        declarationList: VariableDeclarationList;
+    }
+    interface ExpressionStatement extends Statement {
+        expression: Expression;
+    }
+    interface IfStatement extends Statement {
+        expression: Expression;
+        thenStatement: Statement;
+        elseStatement?: Statement;
+    }
+    interface IterationStatement extends Statement {
+        statement: Statement;
+    }
+    interface DoStatement extends IterationStatement {
+        expression: Expression;
+    }
+    interface WhileStatement extends IterationStatement {
+        expression: Expression;
+    }
+    interface ForStatement extends IterationStatement {
+        initializer?: VariableDeclarationList | Expression;
+        condition?: Expression;
+        incrementor?: Expression;
+    }
+    interface ForInStatement extends IterationStatement {
+        initializer: VariableDeclarationList | Expression;
+        expression: Expression;
+    }
+    interface ForOfStatement extends IterationStatement {
+        initializer: VariableDeclarationList | Expression;
+        expression: Expression;
+    }
+    interface BreakStatement extends Statement {
+        label?: Identifier;
+    }
+    interface ContinueStatement extends Statement {
+        label?: Identifier;
+    }
+    type BreakOrContinueStatement = BreakStatement | ContinueStatement;
+    interface ReturnStatement extends Statement {
+        expression?: Expression;
+    }
+    interface WithStatement extends Statement {
+        expression: Expression;
+        statement: Statement;
+    }
+    interface SwitchStatement extends Statement {
+        expression: Expression;
+        caseBlock: CaseBlock;
+    }
+    interface CaseBlock extends Node {
+        clauses: NodeArray<CaseOrDefaultClause>;
+    }
+    interface CaseClause extends Node {
+        expression: Expression;
+        statements: NodeArray<Statement>;
+    }
+    interface DefaultClause extends Node {
+        statements: NodeArray<Statement>;
+    }
+    type CaseOrDefaultClause = CaseClause | DefaultClause;
+    interface LabeledStatement extends Statement {
+        label: Identifier;
+        statement: Statement;
+    }
+    interface ThrowStatement extends Statement {
+        expression: Expression;
+    }
+    interface TryStatement extends Statement {
+        tryBlock: Block;
+        catchClause?: CatchClause;
+        finallyBlock?: Block;
+    }
+    interface CatchClause extends Node {
+        variableDeclaration: VariableDeclaration;
+        block: Block;
+    }
+    type DeclarationWithTypeParameters = SignatureDeclaration | ClassLikeDeclaration | InterfaceDeclaration | TypeAliasDeclaration;
+    interface ClassLikeDeclaration extends Declaration {
+        name?: Identifier;
+        typeParameters?: NodeArray<TypeParameterDeclaration>;
+        heritageClauses?: NodeArray<HeritageClause>;
+        members: NodeArray<ClassElement>;
+    }
+    interface ClassDeclaration extends ClassLikeDeclaration, DeclarationStatement {
+        name?: Identifier;
+    }
+    interface ClassExpression extends ClassLikeDeclaration, PrimaryExpression {
+    }
+    interface ClassElement extends Declaration {
+        _classElementBrand: any;
+        name?: PropertyName;
+    }
+    interface TypeElement extends Declaration {
+        _typeElementBrand: any;
+        name?: PropertyName;
+        questionToken?: Node;
+    }
+    interface InterfaceDeclaration extends DeclarationStatement {
+        name: Identifier;
+        typeParameters?: NodeArray<TypeParameterDeclaration>;
+        heritageClauses?: NodeArray<HeritageClause>;
+        members: NodeArray<TypeElement>;
+    }
+    interface HeritageClause extends Node {
+        token: SyntaxKind;
+        types?: NodeArray<ExpressionWithTypeArguments>;
+    }
+    interface TypeAliasDeclaration extends DeclarationStatement {
+        name: Identifier;
+        typeParameters?: NodeArray<TypeParameterDeclaration>;
+        type: TypeNode;
+    }
+    interface EnumMember extends Declaration {
+        name: DeclarationName;
+        initializer?: Expression;
+    }
+    interface EnumDeclaration extends DeclarationStatement {
+        name: Identifier;
+        members: NodeArray<EnumMember>;
+    }
+    type ModuleBody = ModuleBlock | ModuleDeclaration;
+    interface ModuleDeclaration extends DeclarationStatement {
+        name: Identifier | LiteralExpression;
+        body: ModuleBlock | ModuleDeclaration;
+    }
+    interface ModuleBlock extends Node, Statement {
+        statements: NodeArray<Statement>;
+    }
+    interface ImportEqualsDeclaration extends DeclarationStatement {
+        name: Identifier;
+        moduleReference: EntityName | ExternalModuleReference;
+    }
+    interface ExternalModuleReference extends Node {
+        expression?: Expression;
+    }
+    interface ImportDeclaration extends Statement {
+        importClause?: ImportClause;
+        moduleSpecifier: Expression;
+    }
+    interface ImportClause extends Declaration {
+        name?: Identifier;
+        namedBindings?: NamespaceImport | NamedImports;
+    }
+    interface NamespaceImport extends Declaration {
+        name: Identifier;
+    }
+    interface NamespaceExportDeclaration extends DeclarationStatement {
+        name: Identifier;
+        moduleReference: LiteralLikeNode;
+    }
+    interface ExportDeclaration extends DeclarationStatement {
+        exportClause?: NamedExports;
+        moduleSpecifier?: Expression;
+    }
+    interface NamedImports extends Node {
+        elements: NodeArray<ImportSpecifier>;
+    }
+    interface NamedExports extends Node {
+        elements: NodeArray<ExportSpecifier>;
+    }
+    type NamedImportsOrExports = NamedImports | NamedExports;
+    interface ImportSpecifier extends Declaration {
+        propertyName?: Identifier;
+        name: Identifier;
+    }
+    interface ExportSpecifier extends Declaration {
+        propertyName?: Identifier;
+        name: Identifier;
+    }
+    type ImportOrExportSpecifier = ImportSpecifier | ExportSpecifier;
+    interface ExportAssignment extends DeclarationStatement {
+        isExportEquals?: boolean;
+        expression: Expression;
+    }
+    interface FileReference extends TextRange {
+        fileName: string;
+    }
+    interface CommentRange extends TextRange {
+        hasTrailingNewLine?: boolean;
+        kind: SyntaxKind;
+    }
+    interface JSDocTypeExpression extends Node {
+        type: JSDocType;
+    }
+    interface JSDocType extends TypeNode {
+        _jsDocTypeBrand: any;
+    }
+    interface JSDocAllType extends JSDocType {
+        _JSDocAllTypeBrand: any;
+    }
+    interface JSDocUnknownType extends JSDocType {
+        _JSDocUnknownTypeBrand: any;
+    }
+    interface JSDocArrayType extends JSDocType {
+        elementType: JSDocType;
+    }
+    interface JSDocUnionType extends JSDocType {
+        types: NodeArray<JSDocType>;
+    }
+    interface JSDocTupleType extends JSDocType {
+        types: NodeArray<JSDocType>;
+    }
+    interface JSDocNonNullableType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocNullableType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocRecordType extends JSDocType, TypeLiteralNode {
+        members: NodeArray<JSDocRecordMember>;
+    }
+    interface JSDocTypeReference extends JSDocType {
+        name: EntityName;
+        typeArguments: NodeArray<JSDocType>;
+    }
+    interface JSDocOptionalType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocFunctionType extends JSDocType, SignatureDeclaration {
+        parameters: NodeArray<ParameterDeclaration>;
+        type: JSDocType;
+    }
+    interface JSDocVariadicType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocConstructorType extends JSDocType {
+        type: JSDocType;
+    }
+    interface JSDocThisType extends JSDocType {
+        type: JSDocType;
+    }
+    type JSDocTypeReferencingNode = JSDocThisType | JSDocConstructorType | JSDocVariadicType | JSDocOptionalType | JSDocNullableType | JSDocNonNullableType;
+    interface JSDocRecordMember extends PropertySignature {
+        name: Identifier | LiteralExpression;
+        type?: JSDocType;
+    }
+    interface JSDocComment extends Node {
+        tags: NodeArray<JSDocTag>;
+    }
+    interface JSDocTag extends Node {
+        atToken: Node;
+        tagName: Identifier;
+    }
+    interface JSDocTemplateTag extends JSDocTag {
+        typeParameters: NodeArray<TypeParameterDeclaration>;
+    }
+    interface JSDocReturnTag extends JSDocTag {
+        typeExpression: JSDocTypeExpression;
+    }
+    interface JSDocTypeTag extends JSDocTag {
+        typeExpression: JSDocTypeExpression;
+    }
+    interface JSDocTypedefTag extends JSDocTag, Declaration {
+        name?: Identifier;
+        typeExpression?: JSDocTypeExpression;
+        jsDocTypeLiteral?: JSDocTypeLiteral;
+    }
+    interface JSDocPropertyTag extends JSDocTag, TypeElement {
+        name: Identifier;
+        typeExpression: JSDocTypeExpression;
+    }
+    interface JSDocTypeLiteral extends JSDocType {
+        jsDocPropertyTags?: NodeArray<JSDocPropertyTag>;
+        jsDocTypeTag?: JSDocTypeTag;
+    }
+    interface JSDocParameterTag extends JSDocTag {
+        preParameterName?: Identifier;
+        typeExpression?: JSDocTypeExpression;
+        postParameterName?: Identifier;
+        isBracketed: boolean;
+    }
+    enum FlowFlags {
+        Unreachable = 1,
+        Start = 2,
+        BranchLabel = 4,
+        LoopLabel = 8,
+        Assignment = 16,
+        TrueCondition = 32,
+        FalseCondition = 64,
+        Referenced = 128,
+        Shared = 256,
+        Label = 12,
+        Condition = 96,
+    }
+    interface FlowNode {
+        flags: FlowFlags;
+        id?: number;
+    }
+    interface FlowStart extends FlowNode {
+        container?: FunctionExpression | ArrowFunction;
+    }
+    interface FlowLabel extends FlowNode {
+        antecedents: FlowNode[];
+    }
+    interface FlowAssignment extends FlowNode {
+        node: Expression | VariableDeclaration | BindingElement;
+        antecedent: FlowNode;
+    }
+    interface FlowCondition extends FlowNode {
+        expression: Expression;
+        antecedent: FlowNode;
+    }
+    interface AmdDependency {
+        path: string;
+        name: string;
+    }
+    interface SourceFile extends Declaration {
+        statements: NodeArray<Statement>;
+        endOfFileToken: Node;
+        fileName: string;
+        path: Path;
+        text: string;
+        amdDependencies: AmdDependency[];
+        moduleName: string;
+        referencedFiles: FileReference[];
+        typeReferenceDirectives: FileReference[];
+        languageVariant: LanguageVariant;
+        isDeclarationFile: boolean;
+        /**
+         * lib.d.ts should have a reference comment like
+         *
+         *  /// <reference no-default-lib="true"/>
+         *
+         * If any other file has this comment, it signals not to include lib.d.ts
+         * because this containing file is intended to act as a default library.
+         */
+        hasNoDefaultLib: boolean;
+        languageVersion: ScriptTarget;
+    }
+    interface ScriptReferenceHost {
+        getCompilerOptions(): CompilerOptions;
+        getSourceFile(fileName: string): SourceFile;
+        getSourceFileByPath(path: Path): SourceFile;
+        getCurrentDirectory(): string;
+    }
+    interface ParseConfigHost {
+        readDirectory(rootDir: string, extension: string, exclude: string[]): string[];
+    }
+    interface WriteFileCallback {
+        (fileName: string, data: string, writeByteOrderMark: boolean, onError?: (message: string) => void, sourceFiles?: SourceFile[]): void;
+    }
+    class OperationCanceledException {
+    }
+    interface CancellationToken {
+        isCancellationRequested(): boolean;
+        /** @throws OperationCanceledException if isCancellationRequested is true */
+        throwIfCancellationRequested(): void;
+    }
+    interface Program extends ScriptReferenceHost {
+        /**
+         * Get a list of root file names that were passed to a 'createProgram'
+         */
+        getRootFileNames(): string[];
+        /**
+         * Get a list of files in the program
+         */
+        getSourceFiles(): SourceFile[];
+        /**
+         * Emits the JavaScript and declaration files.  If targetSourceFile is not specified, then
+         * the JavaScript and declaration files will be produced for all the files in this program.
+         * If targetSourceFile is specified, then only the JavaScript and declaration for that
+         * specific file will be generated.
+         *
+         * If writeFile is not specified then the writeFile callback from the compiler host will be
+         * used for writing the JavaScript and declaration files.  Otherwise, the writeFile parameter
+         * will be invoked when writing the JavaScript and declaration files.
+         */
+        emit(targetSourceFile?: SourceFile, writeFile?: WriteFileCallback, cancellationToken?: CancellationToken): EmitResult;
+        getOptionsDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
+        getGlobalDiagnostics(cancellationToken?: CancellationToken): Diagnostic[];
+        getSyntacticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+        getSemanticDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+        getDeclarationDiagnostics(sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+        /**
+         * Gets a type checker that can be used to semantically analyze source fils in the program.
+         */
+        getTypeChecker(): TypeChecker;
+    }
+    interface SourceMapSpan {
+        /** Line number in the .js file. */
+        emittedLine: number;
+        /** Column number in the .js file. */
+        emittedColumn: number;
+        /** Line number in the .ts file. */
+        sourceLine: number;
+        /** Column number in the .ts file. */
+        sourceColumn: number;
+        /** Optional name (index into names array) associated with this span. */
+        nameIndex?: number;
+        /** .ts file (index into sources array) associated with this span */
+        sourceIndex: number;
+    }
+    interface SourceMapData {
+        sourceMapFilePath: string;
+        jsSourceMappingURL: string;
+        sourceMapFile: string;
+        sourceMapSourceRoot: string;
+        sourceMapSources: string[];
+        sourceMapSourcesContent?: string[];
+        inputSourceFileNames: string[];
+        sourceMapNames?: string[];
+        sourceMapMappings: string;
+        sourceMapDecodedMappings: SourceMapSpan[];
+    }
+    /** Return code used by getEmitOutput function to indicate status of the function */
+    enum ExitStatus {
+        Success = 0,
+        DiagnosticsPresent_OutputsSkipped = 1,
+        DiagnosticsPresent_OutputsGenerated = 2,
+    }
+    interface EmitResult {
+        emitSkipped: boolean;
+        /** Contains declaration emit diagnostics */
+        diagnostics: Diagnostic[];
+        emittedFiles: string[];
+    }
+    interface TypeChecker {
+        getTypeOfSymbolAtLocation(symbol: Symbol, node: Node): Type;
+        getDeclaredTypeOfSymbol(symbol: Symbol): Type;
+        getPropertiesOfType(type: Type): Symbol[];
+        getPropertyOfType(type: Type, propertyName: string): Symbol;
+        getSignaturesOfType(type: Type, kind: SignatureKind): Signature[];
+        getIndexTypeOfType(type: Type, kind: IndexKind): Type;
+        getBaseTypes(type: InterfaceType): ObjectType[];
+        getReturnTypeOfSignature(signature: Signature): Type;
+        getNonNullableType(type: Type): Type;
+        getSymbolsInScope(location: Node, meaning: SymbolFlags): Symbol[];
+        getSymbolAtLocation(node: Node): Symbol;
+        getSymbolsOfParameterPropertyDeclaration(parameter: ParameterDeclaration, parameterName: string): Symbol[];
+        getShorthandAssignmentValueSymbol(location: Node): Symbol;
+        getExportSpecifierLocalTargetSymbol(location: ExportSpecifier): Symbol;
+        getPropertySymbolOfDestructuringAssignment(location: Identifier): Symbol;
+        getTypeAtLocation(node: Node): Type;
+        typeToString(type: Type, enclosingDeclaration?: Node, flags?: TypeFormatFlags): string;
+        symbolToString(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): string;
+        getSymbolDisplayBuilder(): SymbolDisplayBuilder;
+        getFullyQualifiedName(symbol: Symbol): string;
+        getAugmentedPropertiesOfType(type: Type): Symbol[];
+        getRootSymbols(symbol: Symbol): Symbol[];
+        getContextualType(node: Expression): Type;
+        getResolvedSignature(node: CallLikeExpression, candidatesOutArray?: Signature[]): Signature;
+        getSignatureFromDeclaration(declaration: SignatureDeclaration): Signature;
+        isImplementationOfOverload(node: FunctionLikeDeclaration): boolean;
+        isUndefinedSymbol(symbol: Symbol): boolean;
+        isArgumentsSymbol(symbol: Symbol): boolean;
+        isUnknownSymbol(symbol: Symbol): boolean;
+        getConstantValue(node: EnumMember | PropertyAccessExpression | ElementAccessExpression): number;
+        isValidPropertyAccess(node: PropertyAccessExpression | QualifiedName, propertyName: string): boolean;
+        getAliasedSymbol(symbol: Symbol): Symbol;
+        getExportsOfModule(moduleSymbol: Symbol): Symbol[];
+        getJsxElementAttributesType(elementNode: JsxOpeningLikeElement): Type;
+        getJsxIntrinsicTagNames(): Symbol[];
+        isOptionalParameter(node: ParameterDeclaration): boolean;
+    }
+    interface SymbolDisplayBuilder {
+        buildTypeDisplay(type: Type, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildSymbolDisplay(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, meaning?: SymbolFlags, flags?: SymbolFormatFlags): void;
+        buildSignatureDisplay(signatures: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags, kind?: SignatureKind): void;
+        buildParameterDisplay(parameter: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildTypeParameterDisplay(tp: TypeParameter, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildTypePredicateDisplay(predicate: TypePredicate, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildTypeParameterDisplayFromSymbol(symbol: Symbol, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildDisplayForParametersAndDelimiters(thisType: Type, parameters: Symbol[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildDisplayForTypeParametersAndDelimiters(typeParameters: TypeParameter[], writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+        buildReturnTypeDisplay(signature: Signature, writer: SymbolWriter, enclosingDeclaration?: Node, flags?: TypeFormatFlags): void;
+    }
+    interface SymbolWriter {
+        writeKeyword(text: string): void;
+        writeOperator(text: string): void;
+        writePunctuation(text: string): void;
+        writeSpace(text: string): void;
+        writeStringLiteral(text: string): void;
+        writeParameter(text: string): void;
+        writeSymbol(text: string, symbol: Symbol): void;
+        writeLine(): void;
+        increaseIndent(): void;
+        decreaseIndent(): void;
+        clear(): void;
+        trackSymbol(symbol: Symbol, enclosingDeclaration?: Node, meaning?: SymbolFlags): void;
+        reportInaccessibleThisError(): void;
+    }
+    enum TypeFormatFlags {
+        None = 0,
+        WriteArrayAsGenericType = 1,
+        UseTypeOfFunction = 2,
+        NoTruncation = 4,
+        WriteArrowStyleSignature = 8,
+        WriteOwnNameForAnyLike = 16,
+        WriteTypeArgumentsOfSignature = 32,
+        InElementType = 64,
+        UseFullyQualifiedType = 128,
+        InFirstTypeArgument = 256,
+    }
+    enum SymbolFormatFlags {
+        None = 0,
+        WriteTypeParametersOrArguments = 1,
+        UseOnlyExternalAliasing = 2,
+    }
+    enum TypePredicateKind {
+        This = 0,
+        Identifier = 1,
+    }
+    interface TypePredicateBase {
+        kind: TypePredicateKind;
+        type: Type;
+    }
+    interface ThisTypePredicate extends TypePredicateBase {
+        _thisTypePredicateBrand: any;
+    }
+    interface IdentifierTypePredicate extends TypePredicateBase {
+        parameterName: string;
+        parameterIndex: number;
+    }
+    type TypePredicate = IdentifierTypePredicate | ThisTypePredicate;
+    enum SymbolFlags {
+        None = 0,
+        FunctionScopedVariable = 1,
+        BlockScopedVariable = 2,
+        Property = 4,
+        EnumMember = 8,
+        Function = 16,
+        Class = 32,
+        Interface = 64,
+        ConstEnum = 128,
+        RegularEnum = 256,
+        ValueModule = 512,
+        NamespaceModule = 1024,
+        TypeLiteral = 2048,
+        ObjectLiteral = 4096,
+        Method = 8192,
+        Constructor = 16384,
+        GetAccessor = 32768,
+        SetAccessor = 65536,
+        Signature = 131072,
+        TypeParameter = 262144,
+        TypeAlias = 524288,
+        ExportValue = 1048576,
+        ExportType = 2097152,
+        ExportNamespace = 4194304,
+        Alias = 8388608,
+        Instantiated = 16777216,
+        Merged = 33554432,
+        Transient = 67108864,
+        Prototype = 134217728,
+        SyntheticProperty = 268435456,
+        Optional = 536870912,
+        ExportStar = 1073741824,
+        Enum = 384,
+        Variable = 3,
+        Value = 107455,
+        Type = 793056,
+        Namespace = 1536,
+        Module = 1536,
+        Accessor = 98304,
+        FunctionScopedVariableExcludes = 107454,
+        BlockScopedVariableExcludes = 107455,
+        ParameterExcludes = 107455,
+        PropertyExcludes = 0,
+        EnumMemberExcludes = 107455,
+        FunctionExcludes = 106927,
+        ClassExcludes = 899519,
+        InterfaceExcludes = 792960,
+        RegularEnumExcludes = 899327,
+        ConstEnumExcludes = 899967,
+        ValueModuleExcludes = 106639,
+        NamespaceModuleExcludes = 0,
+        MethodExcludes = 99263,
+        GetAccessorExcludes = 41919,
+        SetAccessorExcludes = 74687,
+        TypeParameterExcludes = 530912,
+        TypeAliasExcludes = 793056,
+        AliasExcludes = 8388608,
+        ModuleMember = 8914931,
+        ExportHasLocal = 944,
+        HasExports = 1952,
+        HasMembers = 6240,
+        BlockScoped = 418,
+        PropertyOrAccessor = 98308,
+        Export = 7340032,
+    }
+    interface Symbol {
+        flags: SymbolFlags;
+        name: string;
+        declarations?: Declaration[];
+        valueDeclaration?: Declaration;
+        members?: SymbolTable;
+        exports?: SymbolTable;
+        globalExports?: SymbolTable;
+    }
+    interface SymbolTable {
+        [index: string]: Symbol;
+    }
+    enum TypeFlags {
+        Any = 1,
+        String = 2,
+        Number = 4,
+        Boolean = 8,
+        Void = 16,
+        Undefined = 32,
+        Null = 64,
+        Enum = 128,
+        StringLiteral = 256,
+        TypeParameter = 512,
+        Class = 1024,
+        Interface = 2048,
+        Reference = 4096,
+        Tuple = 8192,
+        Union = 16384,
+        Intersection = 32768,
+        Anonymous = 65536,
+        Instantiated = 131072,
+        ObjectLiteral = 524288,
+        ESSymbol = 16777216,
+        ThisType = 33554432,
+        ObjectLiteralPatternWithComputedProperties = 67108864,
+        Never = 134217728,
+        Falsy = 126,
+        StringLike = 258,
+        NumberLike = 132,
+        ObjectType = 80896,
+        UnionOrIntersection = 49152,
+        StructuredType = 130048,
+        Narrowable = 16908175,
+    }
+    type DestructuringPattern = BindingPattern | ObjectLiteralExpression | ArrayLiteralExpression;
+    interface Type {
+        flags: TypeFlags;
+        symbol?: Symbol;
+        pattern?: DestructuringPattern;
+    }
+    interface StringLiteralType extends Type {
+        text: string;
+    }
+    interface ObjectType extends Type {
+    }
+    interface InterfaceType extends ObjectType {
+        typeParameters: TypeParameter[];
+        outerTypeParameters: TypeParameter[];
+        localTypeParameters: TypeParameter[];
+        thisType: TypeParameter;
+    }
+    interface InterfaceTypeWithDeclaredMembers extends InterfaceType {
+        declaredProperties: Symbol[];
+        declaredCallSignatures: Signature[];
+        declaredConstructSignatures: Signature[];
+        declaredStringIndexInfo: IndexInfo;
+        declaredNumberIndexInfo: IndexInfo;
+    }
+    interface TypeReference extends ObjectType {
+        target: GenericType;
+        typeArguments: Type[];
+    }
+    interface GenericType extends InterfaceType, TypeReference {
+    }
+    interface TupleType extends ObjectType {
+        elementTypes: Type[];
+    }
+    interface UnionOrIntersectionType extends Type {
+        types: Type[];
+    }
+    interface UnionType extends UnionOrIntersectionType {
+    }
+    interface IntersectionType extends UnionOrIntersectionType {
+    }
+    interface TypeParameter extends Type {
+        constraint: Type;
+    }
+    enum SignatureKind {
+        Call = 0,
+        Construct = 1,
+    }
+    interface Signature {
+        declaration: SignatureDeclaration;
+        typeParameters: TypeParameter[];
+        parameters: Symbol[];
+        thisType?: Type;
+    }
+    enum IndexKind {
+        String = 0,
+        Number = 1,
+    }
+    interface IndexInfo {
+        type: Type;
+        isReadonly: boolean;
+        declaration?: SignatureDeclaration;
+    }
+    interface DiagnosticMessage {
+        key: string;
+        category: DiagnosticCategory;
+        code: number;
+        message: string;
+    }
+    /**
+     * A linked list of formatted diagnostic messages to be used as part of a multiline message.
+     * It is built from the bottom up, leaving the head to be the "main" diagnostic.
+     * While it seems that DiagnosticMessageChain is structurally similar to DiagnosticMessage,
+     * the difference is that messages are all preformatted in DMC.
+     */
+    interface DiagnosticMessageChain {
+        messageText: string;
+        category: DiagnosticCategory;
+        code: number;
+        next?: DiagnosticMessageChain;
+    }
+    interface Diagnostic {
+        file: SourceFile;
+        start: number;
+        length: number;
+        messageText: string | DiagnosticMessageChain;
+        category: DiagnosticCategory;
+        code: number;
+    }
+    enum DiagnosticCategory {
+        Warning = 0,
+        Error = 1,
+        Message = 2,
+    }
+    enum ModuleResolutionKind {
+        Classic = 1,
+        NodeJs = 2,
+    }
+    type RootPaths = string[];
+    type PathSubstitutions = Map<string[]>;
+    type TsConfigOnlyOptions = RootPaths | PathSubstitutions;
+    type CompilerOptionsValue = string | number | boolean | (string | number)[] | TsConfigOnlyOptions;
+    interface CompilerOptions {
+        allowJs?: boolean;
+        allowSyntheticDefaultImports?: boolean;
+        allowUnreachableCode?: boolean;
+        allowUnusedLabels?: boolean;
+        baseUrl?: string;
+        charset?: string;
+        declaration?: boolean;
+        declarationDir?: string;
+        emitBOM?: boolean;
+        emitDecoratorMetadata?: boolean;
+        experimentalDecorators?: boolean;
+        forceConsistentCasingInFileNames?: boolean;
+        inlineSourceMap?: boolean;
+        inlineSources?: boolean;
+        isolatedModules?: boolean;
+        jsx?: JsxEmit;
+        lib?: string[];
+        locale?: string;
+        mapRoot?: string;
+        module?: ModuleKind;
+        moduleResolution?: ModuleResolutionKind;
+        newLine?: NewLineKind;
+        noEmit?: boolean;
+        noEmitHelpers?: boolean;
+        noEmitOnError?: boolean;
+        noErrorTruncation?: boolean;
+        noFallthroughCasesInSwitch?: boolean;
+        noImplicitAny?: boolean;
+        noImplicitReturns?: boolean;
+        noImplicitThis?: boolean;
+        noImplicitUseStrict?: boolean;
+        noLib?: boolean;
+        noResolve?: boolean;
+        out?: string;
+        outDir?: string;
+        outFile?: string;
+        paths?: PathSubstitutions;
+        preserveConstEnums?: boolean;
+        project?: string;
+        reactNamespace?: string;
+        removeComments?: boolean;
+        rootDir?: string;
+        rootDirs?: RootPaths;
+        skipLibCheck?: boolean;
+        skipDefaultLibCheck?: boolean;
+        sourceMap?: boolean;
+        sourceRoot?: string;
+        strictNullChecks?: boolean;
+        suppressExcessPropertyErrors?: boolean;
+        suppressImplicitAnyIndexErrors?: boolean;
+        target?: ScriptTarget;
+        traceResolution?: boolean;
+        types?: string[];
+        typesSearchPaths?: string[];
+        [option: string]: CompilerOptionsValue | undefined;
+    }
+    interface TypingOptions {
+        enableAutoDiscovery?: boolean;
+        include?: string[];
+        exclude?: string[];
+        [option: string]: string[] | boolean | undefined;
+    }
+    interface DiscoverTypingsInfo {
+        fileNames: string[];
+        projectRootPath: string;
+        safeListPath: string;
+        packageNameToTypingLocation: Map<string>;
+        typingOptions: TypingOptions;
+        compilerOptions: CompilerOptions;
+    }
+    enum ModuleKind {
+        None = 0,
+        CommonJS = 1,
+        AMD = 2,
+        UMD = 3,
+        System = 4,
+        ES6 = 5,
+        ES2015 = 5,
+    }
+    enum JsxEmit {
+        None = 0,
+        Preserve = 1,
+        React = 2,
+    }
+    enum NewLineKind {
+        CarriageReturnLineFeed = 0,
+        LineFeed = 1,
+    }
+    interface LineAndCharacter {
+        line: number;
+        character: number;
+    }
+    enum ScriptKind {
+        Unknown = 0,
+        JS = 1,
+        JSX = 2,
+        TS = 3,
+        TSX = 4,
+    }
+    enum ScriptTarget {
+        ES3 = 0,
+        ES5 = 1,
+        ES6 = 2,
+        ES2015 = 2,
+        Latest = 2,
+    }
+    enum LanguageVariant {
+        Standard = 0,
+        JSX = 1,
+    }
+    interface ParsedCommandLine {
+        options: CompilerOptions;
+        typingOptions?: TypingOptions;
+        fileNames: string[];
+        raw?: any;
+        errors: Diagnostic[];
+    }
+    interface ModuleResolutionHost {
+        fileExists(fileName: string): boolean;
+        readFile(fileName: string): string;
+        trace?(s: string): void;
+        directoryExists?(directoryName: string): boolean;
+        realpath?(path: string): string;
+        getCurrentDirectory?(): string;
+    }
+    interface ResolvedModule {
+        resolvedFileName: string;
+        isExternalLibraryImport?: boolean;
+    }
+    interface ResolvedModuleWithFailedLookupLocations {
+        resolvedModule: ResolvedModule;
+        failedLookupLocations: string[];
+    }
+    interface ResolvedTypeReferenceDirective {
+        primary: boolean;
+        resolvedFileName?: string;
+    }
+    interface ResolvedTypeReferenceDirectiveWithFailedLookupLocations {
+        resolvedTypeReferenceDirective: ResolvedTypeReferenceDirective;
+        failedLookupLocations: string[];
+    }
+    interface CompilerHost extends ModuleResolutionHost {
+        getSourceFile(fileName: string, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile;
+        getSourceFileByPath?(fileName: string, path: Path, languageVersion: ScriptTarget, onError?: (message: string) => void): SourceFile;
+        getCancellationToken?(): CancellationToken;
+        getDefaultLibFileName(options: CompilerOptions): string;
+        getDefaultLibLocation?(): string;
+        getDefaultTypeDirectiveNames?(rootPath: string): string[];
+        writeFile: WriteFileCallback;
+        getCurrentDirectory(): string;
+        getCanonicalFileName(fileName: string): string;
+        useCaseSensitiveFileNames(): boolean;
+        getNewLine(): string;
+        resolveModuleNames?(moduleNames: string[], containingFile: string): ResolvedModule[];
+        /**
+         * This method is a companion for 'resolveModuleNames' and is used to resolve 'types' references to actual type declaration files
+         */
+        resolveTypeReferenceDirectives?(typeReferenceDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
+    }
+    interface TextSpan {
+        start: number;
+        length: number;
+    }
+    interface TextChangeRange {
+        span: TextSpan;
+        newLength: number;
+    }
+    interface SyntaxList extends Node {
+        _children: Node[];
+    }
+}
+declare namespace ts {
+    type FileWatcherCallback = (fileName: string, removed?: boolean) => void;
+    type DirectoryWatcherCallback = (fileName: string) => void;
+    interface WatchedFile {
+        fileName: string;
+        callback: FileWatcherCallback;
+        mtime?: Date;
+    }
+    interface System {
+        args: string[];
+        newLine: string;
+        useCaseSensitiveFileNames: boolean;
+        write(s: string): void;
+        readFile(path: string, encoding?: string): string;
+        writeFile(path: string, data: string, writeByteOrderMark?: boolean): void;
+        watchFile?(path: string, callback: FileWatcherCallback): FileWatcher;
+        watchDirectory?(path: string, callback: DirectoryWatcherCallback, recursive?: boolean): FileWatcher;
+        resolvePath(path: string): string;
+        fileExists(path: string): boolean;
+        directoryExists(path: string): boolean;
+        createDirectory(path: string): void;
+        getExecutingFilePath(): string;
+        getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
+        readDirectory(path: string, extension?: string, exclude?: string[]): string[];
+        getModifiedTime?(path: string): Date;
+        createHash?(data: string): string;
+        getMemoryUsage?(): number;
+        exit(exitCode?: number): void;
+        realpath?(path: string): string;
+    }
+    interface FileWatcher {
+        close(): void;
+    }
+    interface DirectoryWatcher extends FileWatcher {
+        directoryName: string;
+        referenceCount: number;
+    }
+    var sys: System;
+}
+declare namespace ts {
+    interface ErrorCallback {
+        (message: DiagnosticMessage, length: number): void;
+    }
+    interface Scanner {
+        getStartPos(): number;
+        getToken(): SyntaxKind;
+        getTextPos(): number;
+        getTokenPos(): number;
+        getTokenText(): string;
+        getTokenValue(): string;
+        hasExtendedUnicodeEscape(): boolean;
+        hasPrecedingLineBreak(): boolean;
+        isIdentifier(): boolean;
+        isReservedWord(): boolean;
+        isUnterminated(): boolean;
+        reScanGreaterToken(): SyntaxKind;
+        reScanSlashToken(): SyntaxKind;
+        reScanTemplateToken(): SyntaxKind;
+        scanJsxIdentifier(): SyntaxKind;
+        reScanJsxToken(): SyntaxKind;
+        scanJsxToken(): SyntaxKind;
+        scanJSDocToken(): SyntaxKind;
+        scan(): SyntaxKind;
+        setText(text: string, start?: number, length?: number): void;
+        setOnError(onError: ErrorCallback): void;
+        setScriptTarget(scriptTarget: ScriptTarget): void;
+        setLanguageVariant(variant: LanguageVariant): void;
+        setTextPos(textPos: number): void;
+        lookAhead<T>(callback: () => T): T;
+        scanRange<T>(start: number, length: number, callback: () => T): T;
+        tryScan<T>(callback: () => T): T;
+    }
+    function tokenToString(t: SyntaxKind): string;
+    function getPositionOfLineAndCharacter(sourceFile: SourceFile, line: number, character: number): number;
+    function getLineAndCharacterOfPosition(sourceFile: SourceFile, position: number): LineAndCharacter;
+    function isWhiteSpace(ch: number): boolean;
+    function isLineBreak(ch: number): boolean;
+    function couldStartTrivia(text: string, pos: number): boolean;
+    function getLeadingCommentRanges(text: string, pos: number): CommentRange[];
+    function getTrailingCommentRanges(text: string, pos: number): CommentRange[];
+    /** Optionally, get the shebang */
+    function getShebang(text: string): string;
+    function isIdentifierStart(ch: number, languageVersion: ScriptTarget): boolean;
+    function isIdentifierPart(ch: number, languageVersion: ScriptTarget): boolean;
+    function createScanner(languageVersion: ScriptTarget, skipTrivia: boolean, languageVariant?: LanguageVariant, text?: string, onError?: ErrorCallback, start?: number, length?: number): Scanner;
+}
+declare namespace ts {
+    function getDefaultLibFileName(options: CompilerOptions): string;
+    function textSpanEnd(span: TextSpan): number;
+    function textSpanIsEmpty(span: TextSpan): boolean;
+    function textSpanContainsPosition(span: TextSpan, position: number): boolean;
+    function textSpanContainsTextSpan(span: TextSpan, other: TextSpan): boolean;
+    function textSpanOverlapsWith(span: TextSpan, other: TextSpan): boolean;
+    function textSpanOverlap(span1: TextSpan, span2: TextSpan): TextSpan;
+    function textSpanIntersectsWithTextSpan(span: TextSpan, other: TextSpan): boolean;
+    function textSpanIntersectsWith(span: TextSpan, start: number, length: number): boolean;
+    function decodedTextSpanIntersectsWith(start1: number, length1: number, start2: number, length2: number): boolean;
+    function textSpanIntersectsWithPosition(span: TextSpan, position: number): boolean;
+    function textSpanIntersection(span1: TextSpan, span2: TextSpan): TextSpan;
+    function createTextSpan(start: number, length: number): TextSpan;
+    function createTextSpanFromBounds(start: number, end: number): TextSpan;
+    function textChangeRangeNewSpan(range: TextChangeRange): TextSpan;
+    function textChangeRangeIsUnchanged(range: TextChangeRange): boolean;
+    function createTextChangeRange(span: TextSpan, newLength: number): TextChangeRange;
+    let unchangedTextChangeRange: TextChangeRange;
+    /**
+     * Called to merge all the changes that occurred across several versions of a script snapshot
+     * into a single change.  i.e. if a user keeps making successive edits to a script we will
+     * have a text change from V1 to V2, V2 to V3, ..., Vn.
+     *
+     * This function will then merge those changes into a single change range valid between V1 and
+     * Vn.
+     */
+    function collapseTextChangeRangesAcrossMultipleVersions(changes: TextChangeRange[]): TextChangeRange;
+    function getTypeParameterOwner(d: Declaration): Declaration;
+    function isParameterPropertyDeclaration(node: ParameterDeclaration): boolean;
+    function startsWith(str: string, prefix: string): boolean;
+    function endsWith(str: string, suffix: string): boolean;
+}
+declare namespace ts {
+    function createNode(kind: SyntaxKind, pos?: number, end?: number): Node;
+    function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodeArray?: (nodes: Node[]) => T): T;
+    function createSourceFile(fileName: string, sourceText: string, languageVersion: ScriptTarget, setParentNodes?: boolean, scriptKind?: ScriptKind): SourceFile;
+    function isExternalModule(file: SourceFile): boolean;
+    function updateSourceFile(sourceFile: SourceFile, newText: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
+}
+declare namespace ts {
+    const version: string;
+    function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean): string;
+    function resolveTripleslashReference(moduleName: string, containingFile: string): string;
+    /**
+     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
+     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
+     * is assumed to be the same as root directory of the project.
+     */
+    function resolveTypeReferenceDirective(typeReferenceDirectiveName: string, containingFile: string, options: CompilerOptions, host: ModuleResolutionHost): ResolvedTypeReferenceDirectiveWithFailedLookupLocations;
+    function resolveModuleName(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
+    function nodeModuleNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
+    function classicNameResolver(moduleName: string, containingFile: string, compilerOptions: CompilerOptions, host: ModuleResolutionHost): ResolvedModuleWithFailedLookupLocations;
+    function createCompilerHost(options: CompilerOptions, setParentNodes?: boolean): CompilerHost;
+    function getPreEmitDiagnostics(program: Program, sourceFile?: SourceFile, cancellationToken?: CancellationToken): Diagnostic[];
+    function flattenDiagnosticMessageText(messageText: string | DiagnosticMessageChain, newLine: string): string;
+    function getDefaultTypeDirectiveNames(options: CompilerOptions, rootFiles: string[], host: CompilerHost): string[];
+    function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program;
+}
+declare namespace ts {
+    /**
+      * Read tsconfig.json file
+      * @param fileName The path to the config file
+      */
+    function readConfigFile(fileName: string, readFile: (path: string) => string): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+      * Parse the text of the tsconfig.json file
+      * @param fileName The path to the config file
+      * @param jsonText The text of the config file
+      */
+    function parseConfigFileTextToJson(fileName: string, jsonText: string): {
+        config?: any;
+        error?: Diagnostic;
+    };
+    /**
+      * Parse the contents of a config file (tsconfig.json).
+      * @param json The contents of the config file to parse
+      * @param host Instance of ParseConfigHost used to enumerate files in folder.
+      * @param basePath A root directory to resolve relative path entries in the config
+      *    file to. e.g. outDir
+      */
+    function parseJsonConfigFileContent(json: any, host: ParseConfigHost, basePath: string, existingOptions?: CompilerOptions, configFileName?: string): ParsedCommandLine;
+    function convertCompilerOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: CompilerOptions;
+        errors: Diagnostic[];
+    };
+    function convertTypingOptionsFromJson(jsonOptions: any, basePath: string, configFileName?: string): {
+        options: CompilerOptions;
+        errors: Diagnostic[];
+    };
+}
+declare namespace ts {
+    /** The version of the language service API */
+    const servicesVersion: string;
+    interface Node {
+        getSourceFile(): SourceFile;
+        getChildCount(sourceFile?: SourceFile): number;
+        getChildAt(index: number, sourceFile?: SourceFile): Node;
+        getChildren(sourceFile?: SourceFile): Node[];
+        getStart(sourceFile?: SourceFile, includeJsDocComment?: boolean): number;
+        getFullStart(): number;
+        getEnd(): number;
+        getWidth(sourceFile?: SourceFile): number;
+        getFullWidth(): number;
+        getLeadingTriviaWidth(sourceFile?: SourceFile): number;
+        getFullText(sourceFile?: SourceFile): string;
+        getText(sourceFile?: SourceFile): string;
+        getFirstToken(sourceFile?: SourceFile): Node;
+        getLastToken(sourceFile?: SourceFile): Node;
+    }
+    interface Symbol {
+        getFlags(): SymbolFlags;
+        getName(): string;
+        getDeclarations(): Declaration[];
+        getDocumentationComment(): SymbolDisplayPart[];
+    }
+    interface Type {
+        getFlags(): TypeFlags;
+        getSymbol(): Symbol;
+        getProperties(): Symbol[];
+        getProperty(propertyName: string): Symbol;
+        getApparentProperties(): Symbol[];
+        getCallSignatures(): Signature[];
+        getConstructSignatures(): Signature[];
+        getStringIndexType(): Type;
+        getNumberIndexType(): Type;
+        getBaseTypes(): ObjectType[];
+        getNonNullableType(): Type;
+    }
+    interface Signature {
+        getDeclaration(): SignatureDeclaration;
+        getTypeParameters(): Type[];
+        getParameters(): Symbol[];
+        getReturnType(): Type;
+        getDocumentationComment(): SymbolDisplayPart[];
+    }
+    interface SourceFile {
+        getLineAndCharacterOfPosition(pos: number): LineAndCharacter;
+        getLineStarts(): number[];
+        getPositionOfLineAndCharacter(line: number, character: number): number;
+        update(newText: string, textChangeRange: TextChangeRange): SourceFile;
+    }
+    /**
+     * Represents an immutable snapshot of a script at a specified time.Once acquired, the
+     * snapshot is observably immutable. i.e. the same calls with the same parameters will return
+     * the same values.
+     */
+    interface IScriptSnapshot {
+        /** Gets a portion of the script snapshot specified by [start, end). */
+        getText(start: number, end: number): string;
+        /** Gets the length of this script snapshot. */
+        getLength(): number;
+        /**
+         * Gets the TextChangeRange that describe how the text changed between this text and
+         * an older version.  This information is used by the incremental parser to determine
+         * what sections of the script need to be re-parsed.  'undefined' can be returned if the
+         * change range cannot be determined.  However, in that case, incremental parsing will
+         * not happen and the entire document will be re - parsed.
+         */
+        getChangeRange(oldSnapshot: IScriptSnapshot): TextChangeRange;
+        /** Releases all resources held by this script snapshot */
+        dispose?(): void;
+    }
+    namespace ScriptSnapshot {
+        function fromString(text: string): IScriptSnapshot;
+    }
+    interface PreProcessedFileInfo {
+        referencedFiles: FileReference[];
+        typeReferenceDirectives: FileReference[];
+        importedFiles: FileReference[];
+        ambientExternalModules: string[];
+        isLibFile: boolean;
+    }
+    interface HostCancellationToken {
+        isCancellationRequested(): boolean;
+    }
+    interface LanguageServiceHost {
+        getCompilationSettings(): CompilerOptions;
+        getNewLine?(): string;
+        getProjectVersion?(): string;
+        getScriptFileNames(): string[];
+        getScriptKind?(fileName: string): ScriptKind;
+        getScriptVersion(fileName: string): string;
+        getScriptSnapshot(fileName: string): IScriptSnapshot | undefined;
+        getLocalizedDiagnosticMessages?(): any;
+        getCancellationToken?(): HostCancellationToken;
+        getCurrentDirectory(): string;
+        getDefaultLibFileName(options: CompilerOptions): string;
+        log?(s: string): void;
+        trace?(s: string): void;
+        error?(s: string): void;
+        useCaseSensitiveFileNames?(): boolean;
+        resolveModuleNames?(moduleNames: string[], containingFile: string): ResolvedModule[];
+        resolveTypeReferenceDirectives?(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
+        directoryExists?(directoryName: string): boolean;
+    }
+    interface LanguageService {
+        cleanupSemanticCache(): void;
+        getSyntacticDiagnostics(fileName: string): Diagnostic[];
+        getSemanticDiagnostics(fileName: string): Diagnostic[];
+        getCompilerOptionsDiagnostics(): Diagnostic[];
+        /**
+         * @deprecated Use getEncodedSyntacticClassifications instead.
+         */
+        getSyntacticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[];
+        /**
+         * @deprecated Use getEncodedSemanticClassifications instead.
+         */
+        getSemanticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[];
+        getEncodedSyntacticClassifications(fileName: string, span: TextSpan): Classifications;
+        getEncodedSemanticClassifications(fileName: string, span: TextSpan): Classifications;
+        getCompletionsAtPosition(fileName: string, position: number): CompletionInfo;
+        getCompletionEntryDetails(fileName: string, position: number, entryName: string): CompletionEntryDetails;
+        getQuickInfoAtPosition(fileName: string, position: number): QuickInfo;
+        getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): TextSpan;
+        getBreakpointStatementAtPosition(fileName: string, position: number): TextSpan;
+        getSignatureHelpItems(fileName: string, position: number): SignatureHelpItems;
+        getRenameInfo(fileName: string, position: number): RenameInfo;
+        findRenameLocations(fileName: string, position: number, findInStrings: boolean, findInComments: boolean): RenameLocation[];
+        getDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[];
+        getTypeDefinitionAtPosition(fileName: string, position: number): DefinitionInfo[];
+        getReferencesAtPosition(fileName: string, position: number): ReferenceEntry[];
+        findReferences(fileName: string, position: number): ReferencedSymbol[];
+        getDocumentHighlights(fileName: string, position: number, filesToSearch: string[]): DocumentHighlights[];
+        /** @deprecated */
+        getOccurrencesAtPosition(fileName: string, position: number): ReferenceEntry[];
+        getNavigateToItems(searchValue: string, maxResultCount?: number): NavigateToItem[];
+        getNavigationBarItems(fileName: string): NavigationBarItem[];
+        getOutliningSpans(fileName: string): OutliningSpan[];
+        getTodoComments(fileName: string, descriptors: TodoCommentDescriptor[]): TodoComment[];
+        getBraceMatchingAtPosition(fileName: string, position: number): TextSpan[];
+        getIndentationAtPosition(fileName: string, position: number, options: EditorOptions): number;
+        getFormattingEditsForRange(fileName: string, start: number, end: number, options: FormatCodeOptions): TextChange[];
+        getFormattingEditsForDocument(fileName: string, options: FormatCodeOptions): TextChange[];
+        getFormattingEditsAfterKeystroke(fileName: string, position: number, key: string, options: FormatCodeOptions): TextChange[];
+        getDocCommentTemplateAtPosition(fileName: string, position: number): TextInsertion;
+        isValidBraceCompletionAtPostion(fileName: string, position: number, openingBrace: number): boolean;
+        getEmitOutput(fileName: string): EmitOutput;
+        getProgram(): Program;
+        dispose(): void;
+    }
+    interface Classifications {
+        spans: number[];
+        endOfLineState: EndOfLineState;
+    }
+    interface ClassifiedSpan {
+        textSpan: TextSpan;
+        classificationType: string;
+    }
+    interface NavigationBarItem {
+        text: string;
+        kind: string;
+        kindModifiers: string;
+        spans: TextSpan[];
+        childItems: NavigationBarItem[];
+        indent: number;
+        bolded: boolean;
+        grayed: boolean;
+    }
+    interface TodoCommentDescriptor {
+        text: string;
+        priority: number;
+    }
+    interface TodoComment {
+        descriptor: TodoCommentDescriptor;
+        message: string;
+        position: number;
+    }
+    class TextChange {
+        span: TextSpan;
+        newText: string;
+    }
+    interface TextInsertion {
+        newText: string;
+        /** The position in newText the caret should point to after the insertion. */
+        caretOffset: number;
+    }
+    interface RenameLocation {
+        textSpan: TextSpan;
+        fileName: string;
+    }
+    interface ReferenceEntry {
+        textSpan: TextSpan;
+        fileName: string;
+        isWriteAccess: boolean;
+    }
+    interface DocumentHighlights {
+        fileName: string;
+        highlightSpans: HighlightSpan[];
+    }
+    namespace HighlightSpanKind {
+        const none: string;
+        const definition: string;
+        const reference: string;
+        const writtenReference: string;
+    }
+    interface HighlightSpan {
+        fileName?: string;
+        textSpan: TextSpan;
+        kind: string;
+    }
+    interface NavigateToItem {
+        name: string;
+        kind: string;
+        kindModifiers: string;
+        matchKind: string;
+        isCaseSensitive: boolean;
+        fileName: string;
+        textSpan: TextSpan;
+        containerName: string;
+        containerKind: string;
+    }
+    interface EditorOptions {
+        IndentSize: number;
+        TabSize: number;
+        NewLineCharacter: string;
+        ConvertTabsToSpaces: boolean;
+        IndentStyle: IndentStyle;
+    }
+    enum IndentStyle {
+        None = 0,
+        Block = 1,
+        Smart = 2,
+    }
+    interface FormatCodeOptions extends EditorOptions {
+        InsertSpaceAfterCommaDelimiter: boolean;
+        InsertSpaceAfterSemicolonInForStatements: boolean;
+        InsertSpaceBeforeAndAfterBinaryOperators: boolean;
+        InsertSpaceAfterKeywordsInControlFlowStatements: boolean;
+        InsertSpaceAfterFunctionKeywordForAnonymousFunctions: boolean;
+        InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis: boolean;
+        InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets: boolean;
+        InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces: boolean;
+        PlaceOpenBraceOnNewLineForFunctions: boolean;
+        PlaceOpenBraceOnNewLineForControlBlocks: boolean;
+        [s: string]: boolean | number | string;
+    }
+    interface DefinitionInfo {
+        fileName: string;
+        textSpan: TextSpan;
+        kind: string;
+        name: string;
+        containerKind: string;
+        containerName: string;
+    }
+    interface ReferencedSymbol {
+        definition: DefinitionInfo;
+        references: ReferenceEntry[];
+    }
+    enum SymbolDisplayPartKind {
+        aliasName = 0,
+        className = 1,
+        enumName = 2,
+        fieldName = 3,
+        interfaceName = 4,
+        keyword = 5,
+        lineBreak = 6,
+        numericLiteral = 7,
+        stringLiteral = 8,
+        localName = 9,
+        methodName = 10,
+        moduleName = 11,
+        operator = 12,
+        parameterName = 13,
+        propertyName = 14,
+        punctuation = 15,
+        space = 16,
+        text = 17,
+        typeParameterName = 18,
+        enumMemberName = 19,
+        functionName = 20,
+        regularExpressionLiteral = 21,
+    }
+    interface SymbolDisplayPart {
+        text: string;
+        kind: string;
+    }
+    interface QuickInfo {
+        kind: string;
+        kindModifiers: string;
+        textSpan: TextSpan;
+        displayParts: SymbolDisplayPart[];
+        documentation: SymbolDisplayPart[];
+    }
+    interface RenameInfo {
+        canRename: boolean;
+        localizedErrorMessage: string;
+        displayName: string;
+        fullDisplayName: string;
+        kind: string;
+        kindModifiers: string;
+        triggerSpan: TextSpan;
+    }
+    interface SignatureHelpParameter {
+        name: string;
+        documentation: SymbolDisplayPart[];
+        displayParts: SymbolDisplayPart[];
+        isOptional: boolean;
+    }
+    /**
+     * Represents a single signature to show in signature help.
+     * The id is used for subsequent calls into the language service to ask questions about the
+     * signature help item in the context of any documents that have been updated.  i.e. after
+     * an edit has happened, while signature help is still active, the host can ask important
+     * questions like 'what parameter is the user currently contained within?'.
+     */
+    interface SignatureHelpItem {
+        isVariadic: boolean;
+        prefixDisplayParts: SymbolDisplayPart[];
+        suffixDisplayParts: SymbolDisplayPart[];
+        separatorDisplayParts: SymbolDisplayPart[];
+        parameters: SignatureHelpParameter[];
+        documentation: SymbolDisplayPart[];
+    }
+    /**
+     * Represents a set of signature help items, and the preferred item that should be selected.
+     */
+    interface SignatureHelpItems {
+        items: SignatureHelpItem[];
+        applicableSpan: TextSpan;
+        selectedItemIndex: number;
+        argumentIndex: number;
+        argumentCount: number;
+    }
+    interface CompletionInfo {
+        isMemberCompletion: boolean;
+        isNewIdentifierLocation: boolean;
+        entries: CompletionEntry[];
+    }
+    interface CompletionEntry {
+        name: string;
+        kind: string;
+        kindModifiers: string;
+        sortText: string;
+    }
+    interface CompletionEntryDetails {
+        name: string;
+        kind: string;
+        kindModifiers: string;
+        displayParts: SymbolDisplayPart[];
+        documentation: SymbolDisplayPart[];
+    }
+    interface OutliningSpan {
+        /** The span of the document to actually collapse. */
+        textSpan: TextSpan;
+        /** The span of the document to display when the user hovers over the collapsed span. */
+        hintSpan: TextSpan;
+        /** The text to display in the editor for the collapsed region. */
+        bannerText: string;
+        /**
+          * Whether or not this region should be automatically collapsed when
+          * the 'Collapse to Definitions' command is invoked.
+          */
+        autoCollapse: boolean;
+    }
+    interface EmitOutput {
+        outputFiles: OutputFile[];
+        emitSkipped: boolean;
+    }
+    enum OutputFileType {
+        JavaScript = 0,
+        SourceMap = 1,
+        Declaration = 2,
+    }
+    interface OutputFile {
+        name: string;
+        writeByteOrderMark: boolean;
+        text: string;
+    }
+    enum EndOfLineState {
+        None = 0,
+        InMultiLineCommentTrivia = 1,
+        InSingleQuoteStringLiteral = 2,
+        InDoubleQuoteStringLiteral = 3,
+        InTemplateHeadOrNoSubstitutionTemplate = 4,
+        InTemplateMiddleOrTail = 5,
+        InTemplateSubstitutionPosition = 6,
+    }
+    enum TokenClass {
+        Punctuation = 0,
+        Keyword = 1,
+        Operator = 2,
+        Comment = 3,
+        Whitespace = 4,
+        Identifier = 5,
+        NumberLiteral = 6,
+        StringLiteral = 7,
+        RegExpLiteral = 8,
+    }
+    interface ClassificationResult {
+        finalLexState: EndOfLineState;
+        entries: ClassificationInfo[];
+    }
+    interface ClassificationInfo {
+        length: number;
+        classification: TokenClass;
+    }
+    interface Classifier {
+        /**
+         * Gives lexical classifications of tokens on a line without any syntactic context.
+         * For instance, a token consisting of the text 'string' can be either an identifier
+         * named 'string' or the keyword 'string', however, because this classifier is not aware,
+         * it relies on certain heuristics to give acceptable results. For classifications where
+         * speed trumps accuracy, this function is preferable; however, for true accuracy, the
+         * syntactic classifier is ideal. In fact, in certain editing scenarios, combining the
+         * lexical, syntactic, and semantic classifiers may issue the best user experience.
+         *
+         * @param text                      The text of a line to classify.
+         * @param lexState                  The state of the lexical classifier at the end of the previous line.
+         * @param syntacticClassifierAbsent Whether the client is *not* using a syntactic classifier.
+         *                                  If there is no syntactic classifier (syntacticClassifierAbsent=true),
+         *                                  certain heuristics may be used in its place; however, if there is a
+         *                                  syntactic classifier (syntacticClassifierAbsent=false), certain
+         *                                  classifications which may be incorrectly categorized will be given
+         *                                  back as Identifiers in order to allow the syntactic classifier to
+         *                                  subsume the classification.
+         * @deprecated Use getLexicalClassifications instead.
+         */
+        getClassificationsForLine(text: string, lexState: EndOfLineState, syntacticClassifierAbsent: boolean): ClassificationResult;
+        getEncodedLexicalClassifications(text: string, endOfLineState: EndOfLineState, syntacticClassifierAbsent: boolean): Classifications;
+    }
+    /**
+      * The document registry represents a store of SourceFile objects that can be shared between
+      * multiple LanguageService instances. A LanguageService instance holds on the SourceFile (AST)
+      * of files in the context.
+      * SourceFile objects account for most of the memory usage by the language service. Sharing
+      * the same DocumentRegistry instance between different instances of LanguageService allow
+      * for more efficient memory utilization since all projects will share at least the library
+      * file (lib.d.ts).
+      *
+      * A more advanced use of the document registry is to serialize sourceFile objects to disk
+      * and re-hydrate them when needed.
+      *
+      * To create a default DocumentRegistry, use createDocumentRegistry to create one, and pass it
+      * to all subsequent createLanguageService calls.
+      */
+    interface DocumentRegistry {
+        /**
+          * Request a stored SourceFile with a given fileName and compilationSettings.
+          * The first call to acquire will call createLanguageServiceSourceFile to generate
+          * the SourceFile if was not found in the registry.
+          *
+          * @param fileName The name of the file requested
+          * @param compilationSettings Some compilation settings like target affects the
+          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
+          * multiple copies of the same file for different compilation settings.
+          * @parm scriptSnapshot Text of the file. Only used if the file was not found
+          * in the registry and a new one was created.
+          * @parm version Current version of the file. Only used if the file was not found
+          * in the registry and a new one was created.
+          */
+        acquireDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
+        acquireDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
+        /**
+          * Request an updated version of an already existing SourceFile with a given fileName
+          * and compilationSettings. The update will in-turn call updateLanguageServiceSourceFile
+          * to get an updated SourceFile.
+          *
+          * @param fileName The name of the file requested
+          * @param compilationSettings Some compilation settings like target affects the
+          * shape of a the resulting SourceFile. This allows the DocumentRegistry to store
+          * multiple copies of the same file for different compilation settings.
+          * @param scriptSnapshot Text of the file.
+          * @param version Current version of the file.
+          */
+        updateDocument(fileName: string, compilationSettings: CompilerOptions, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
+        updateDocumentWithKey(fileName: string, path: Path, compilationSettings: CompilerOptions, key: DocumentRegistryBucketKey, scriptSnapshot: IScriptSnapshot, version: string, scriptKind?: ScriptKind): SourceFile;
+        getKeyForCompilationSettings(settings: CompilerOptions): DocumentRegistryBucketKey;
+        /**
+          * Informs the DocumentRegistry that a file is not needed any longer.
+          *
+          * Note: It is not allowed to call release on a SourceFile that was not acquired from
+          * this registry originally.
+          *
+          * @param fileName The name of the file to be released
+          * @param compilationSettings The compilation settings used to acquire the file
+          */
+        releaseDocument(fileName: string, compilationSettings: CompilerOptions): void;
+        releaseDocumentWithKey(path: Path, key: DocumentRegistryBucketKey): void;
+        reportStats(): string;
+    }
+    type DocumentRegistryBucketKey = string & {
+        __bucketKey: any;
+    };
+    namespace ScriptElementKind {
+        const unknown: string;
+        const warning: string;
+        /** predefined type (void) or keyword (class) */
+        const keyword: string;
+        /** top level script node */
+        const scriptElement: string;
+        /** module foo {} */
+        const moduleElement: string;
+        /** class X {} */
+        const classElement: string;
+        /** var x = class X {} */
+        const localClassElement: string;
+        /** interface Y {} */
+        const interfaceElement: string;
+        /** type T = ... */
+        const typeElement: string;
+        /** enum E */
+        const enumElement: string;
+        /**
+         * Inside module and script only
+         * const v = ..
+         */
+        const variableElement: string;
+        /** Inside function */
+        const localVariableElement: string;
+        /**
+         * Inside module and script only
+         * function f() { }
+         */
+        const functionElement: string;
+        /** Inside function */
+        const localFunctionElement: string;
+        /** class X { [public|private]* foo() {} } */
+        const memberFunctionElement: string;
+        /** class X { [public|private]* [get|set] foo:number; } */
+        const memberGetAccessorElement: string;
+        const memberSetAccessorElement: string;
+        /**
+         * class X { [public|private]* foo:number; }
+         * interface Y { foo:number; }
+         */
+        const memberVariableElement: string;
+        /** class X { constructor() { } } */
+        const constructorImplementationElement: string;
+        /** interface Y { ():number; } */
+        const callSignatureElement: string;
+        /** interface Y { []:number; } */
+        const indexSignatureElement: string;
+        /** interface Y { new():Y; } */
+        const constructSignatureElement: string;
+        /** function foo(*Y*: string) */
+        const parameterElement: string;
+        const typeParameterElement: string;
+        const primitiveType: string;
+        const label: string;
+        const alias: string;
+        const constElement: string;
+        const letElement: string;
+    }
+    namespace ScriptElementKindModifier {
+        const none: string;
+        const publicMemberModifier: string;
+        const privateMemberModifier: string;
+        const protectedMemberModifier: string;
+        const exportedModifier: string;
+        const ambientModifier: string;
+        const staticModifier: string;
+        const abstractModifier: string;
+    }
+    class ClassificationTypeNames {
+        static comment: string;
+        static identifier: string;
+        static keyword: string;
+        static numericLiteral: string;
+        static operator: string;
+        static stringLiteral: string;
+        static whiteSpace: string;
+        static text: string;
+        static punctuation: string;
+        static className: string;
+        static enumName: string;
+        static interfaceName: string;
+        static moduleName: string;
+        static typeParameterName: string;
+        static typeAliasName: string;
+        static parameterName: string;
+        static docCommentTagName: string;
+        static jsxOpenTagName: string;
+        static jsxCloseTagName: string;
+        static jsxSelfClosingTagName: string;
+        static jsxAttribute: string;
+        static jsxText: string;
+        static jsxAttributeStringLiteralValue: string;
+    }
+    enum ClassificationType {
+        comment = 1,
+        identifier = 2,
+        keyword = 3,
+        numericLiteral = 4,
+        operator = 5,
+        stringLiteral = 6,
+        regularExpressionLiteral = 7,
+        whiteSpace = 8,
+        text = 9,
+        punctuation = 10,
+        className = 11,
+        enumName = 12,
+        interfaceName = 13,
+        moduleName = 14,
+        typeParameterName = 15,
+        typeAliasName = 16,
+        parameterName = 17,
+        docCommentTagName = 18,
+        jsxOpenTagName = 19,
+        jsxCloseTagName = 20,
+        jsxSelfClosingTagName = 21,
+        jsxAttribute = 22,
+        jsxText = 23,
+        jsxAttributeStringLiteralValue = 24,
+    }
+    interface DisplayPartsSymbolWriter extends SymbolWriter {
+        displayParts(): SymbolDisplayPart[];
+    }
+    function displayPartsToString(displayParts: SymbolDisplayPart[]): string;
+    function getDefaultCompilerOptions(): CompilerOptions;
+    interface TranspileOptions {
+        compilerOptions?: CompilerOptions;
+        fileName?: string;
+        reportDiagnostics?: boolean;
+        moduleName?: string;
+        renamedDependencies?: Map<string>;
+    }
+    interface TranspileOutput {
+        outputText: string;
+        diagnostics?: Diagnostic[];
+        sourceMapText?: string;
+    }
+    function transpileModule(input: string, transpileOptions: TranspileOptions): TranspileOutput;
+    function transpile(input: string, compilerOptions?: CompilerOptions, fileName?: string, diagnostics?: Diagnostic[], moduleName?: string): string;
+    function createLanguageServiceSourceFile(fileName: string, scriptSnapshot: IScriptSnapshot, scriptTarget: ScriptTarget, version: string, setNodeParents: boolean, scriptKind?: ScriptKind): SourceFile;
+    let disableIncrementalParsing: boolean;
+    function updateLanguageServiceSourceFile(sourceFile: SourceFile, scriptSnapshot: IScriptSnapshot, version: string, textChangeRange: TextChangeRange, aggressiveChecks?: boolean): SourceFile;
+    function createDocumentRegistry(useCaseSensitiveFileNames?: boolean, currentDirectory?: string): DocumentRegistry;
+    function preProcessFile(sourceText: string, readImportFiles?: boolean, detectJavaScriptImports?: boolean): PreProcessedFileInfo;
+    function createLanguageService(host: LanguageServiceHost, documentRegistry?: DocumentRegistry): LanguageService;
+    function createClassifier(): Classifier;
+    /**
+      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
+      * node package.
+      * The functionality is not supported if the ts module is consumed outside of a node module.
+      */
+    function getDefaultLibFilePath(options: CompilerOptions): string;
+}
diff --git a/lib/typescriptServices.js b/lib/typescriptServices.js
index df838f8f743..9e41f640305 100644
--- a/lib/typescriptServices.js
+++ b/lib/typescriptServices.js
@@ -13,58314 +13,58978 @@ See the Apache Version 2.0 License for specific language governing permissions
 and limitations under the License.
 ***************************************************************************** */
 
-var __extends = (this && this.__extends) || function (d, b) {
-    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
-    function __() { this.constructor = d; }
-    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
-};
-var ts;
-(function (ts) {
-    // token > SyntaxKind.Identifer => token is a keyword
-    // Also, If you add a new SyntaxKind be sure to keep the `Markers` section at the bottom in sync
-    (function (SyntaxKind) {
-        SyntaxKind[SyntaxKind["Unknown"] = 0] = "Unknown";
-        SyntaxKind[SyntaxKind["EndOfFileToken"] = 1] = "EndOfFileToken";
-        SyntaxKind[SyntaxKind["SingleLineCommentTrivia"] = 2] = "SingleLineCommentTrivia";
-        SyntaxKind[SyntaxKind["MultiLineCommentTrivia"] = 3] = "MultiLineCommentTrivia";
-        SyntaxKind[SyntaxKind["NewLineTrivia"] = 4] = "NewLineTrivia";
-        SyntaxKind[SyntaxKind["WhitespaceTrivia"] = 5] = "WhitespaceTrivia";
-        // We detect and preserve #! on the first line
-        SyntaxKind[SyntaxKind["ShebangTrivia"] = 6] = "ShebangTrivia";
-        // We detect and provide better error recovery when we encounter a git merge marker.  This
-        // allows us to edit files with git-conflict markers in them in a much more pleasant manner.
-        SyntaxKind[SyntaxKind["ConflictMarkerTrivia"] = 7] = "ConflictMarkerTrivia";
-        // Literals
-        SyntaxKind[SyntaxKind["NumericLiteral"] = 8] = "NumericLiteral";
-        SyntaxKind[SyntaxKind["StringLiteral"] = 9] = "StringLiteral";
-        SyntaxKind[SyntaxKind["RegularExpressionLiteral"] = 10] = "RegularExpressionLiteral";
-        SyntaxKind[SyntaxKind["NoSubstitutionTemplateLiteral"] = 11] = "NoSubstitutionTemplateLiteral";
-        // Pseudo-literals
-        SyntaxKind[SyntaxKind["TemplateHead"] = 12] = "TemplateHead";
-        SyntaxKind[SyntaxKind["TemplateMiddle"] = 13] = "TemplateMiddle";
-        SyntaxKind[SyntaxKind["TemplateTail"] = 14] = "TemplateTail";
-        // Punctuation
-        SyntaxKind[SyntaxKind["OpenBraceToken"] = 15] = "OpenBraceToken";
-        SyntaxKind[SyntaxKind["CloseBraceToken"] = 16] = "CloseBraceToken";
-        SyntaxKind[SyntaxKind["OpenParenToken"] = 17] = "OpenParenToken";
-        SyntaxKind[SyntaxKind["CloseParenToken"] = 18] = "CloseParenToken";
-        SyntaxKind[SyntaxKind["OpenBracketToken"] = 19] = "OpenBracketToken";
-        SyntaxKind[SyntaxKind["CloseBracketToken"] = 20] = "CloseBracketToken";
-        SyntaxKind[SyntaxKind["DotToken"] = 21] = "DotToken";
-        SyntaxKind[SyntaxKind["DotDotDotToken"] = 22] = "DotDotDotToken";
-        SyntaxKind[SyntaxKind["SemicolonToken"] = 23] = "SemicolonToken";
-        SyntaxKind[SyntaxKind["CommaToken"] = 24] = "CommaToken";
-        SyntaxKind[SyntaxKind["LessThanToken"] = 25] = "LessThanToken";
-        SyntaxKind[SyntaxKind["LessThanSlashToken"] = 26] = "LessThanSlashToken";
-        SyntaxKind[SyntaxKind["GreaterThanToken"] = 27] = "GreaterThanToken";
-        SyntaxKind[SyntaxKind["LessThanEqualsToken"] = 28] = "LessThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanEqualsToken"] = 29] = "GreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsEqualsToken"] = 30] = "EqualsEqualsToken";
-        SyntaxKind[SyntaxKind["ExclamationEqualsToken"] = 31] = "ExclamationEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsEqualsEqualsToken"] = 32] = "EqualsEqualsEqualsToken";
-        SyntaxKind[SyntaxKind["ExclamationEqualsEqualsToken"] = 33] = "ExclamationEqualsEqualsToken";
-        SyntaxKind[SyntaxKind["EqualsGreaterThanToken"] = 34] = "EqualsGreaterThanToken";
-        SyntaxKind[SyntaxKind["PlusToken"] = 35] = "PlusToken";
-        SyntaxKind[SyntaxKind["MinusToken"] = 36] = "MinusToken";
-        SyntaxKind[SyntaxKind["AsteriskToken"] = 37] = "AsteriskToken";
-        SyntaxKind[SyntaxKind["AsteriskAsteriskToken"] = 38] = "AsteriskAsteriskToken";
-        SyntaxKind[SyntaxKind["SlashToken"] = 39] = "SlashToken";
-        SyntaxKind[SyntaxKind["PercentToken"] = 40] = "PercentToken";
-        SyntaxKind[SyntaxKind["PlusPlusToken"] = 41] = "PlusPlusToken";
-        SyntaxKind[SyntaxKind["MinusMinusToken"] = 42] = "MinusMinusToken";
-        SyntaxKind[SyntaxKind["LessThanLessThanToken"] = 43] = "LessThanLessThanToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanToken"] = 44] = "GreaterThanGreaterThanToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanToken"] = 45] = "GreaterThanGreaterThanGreaterThanToken";
-        SyntaxKind[SyntaxKind["AmpersandToken"] = 46] = "AmpersandToken";
-        SyntaxKind[SyntaxKind["BarToken"] = 47] = "BarToken";
-        SyntaxKind[SyntaxKind["CaretToken"] = 48] = "CaretToken";
-        SyntaxKind[SyntaxKind["ExclamationToken"] = 49] = "ExclamationToken";
-        SyntaxKind[SyntaxKind["TildeToken"] = 50] = "TildeToken";
-        SyntaxKind[SyntaxKind["AmpersandAmpersandToken"] = 51] = "AmpersandAmpersandToken";
-        SyntaxKind[SyntaxKind["BarBarToken"] = 52] = "BarBarToken";
-        SyntaxKind[SyntaxKind["QuestionToken"] = 53] = "QuestionToken";
-        SyntaxKind[SyntaxKind["ColonToken"] = 54] = "ColonToken";
-        SyntaxKind[SyntaxKind["AtToken"] = 55] = "AtToken";
-        // Assignments
-        SyntaxKind[SyntaxKind["EqualsToken"] = 56] = "EqualsToken";
-        SyntaxKind[SyntaxKind["PlusEqualsToken"] = 57] = "PlusEqualsToken";
-        SyntaxKind[SyntaxKind["MinusEqualsToken"] = 58] = "MinusEqualsToken";
-        SyntaxKind[SyntaxKind["AsteriskEqualsToken"] = 59] = "AsteriskEqualsToken";
-        SyntaxKind[SyntaxKind["AsteriskAsteriskEqualsToken"] = 60] = "AsteriskAsteriskEqualsToken";
-        SyntaxKind[SyntaxKind["SlashEqualsToken"] = 61] = "SlashEqualsToken";
-        SyntaxKind[SyntaxKind["PercentEqualsToken"] = 62] = "PercentEqualsToken";
-        SyntaxKind[SyntaxKind["LessThanLessThanEqualsToken"] = 63] = "LessThanLessThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanEqualsToken"] = 64] = "GreaterThanGreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanEqualsToken"] = 65] = "GreaterThanGreaterThanGreaterThanEqualsToken";
-        SyntaxKind[SyntaxKind["AmpersandEqualsToken"] = 66] = "AmpersandEqualsToken";
-        SyntaxKind[SyntaxKind["BarEqualsToken"] = 67] = "BarEqualsToken";
-        SyntaxKind[SyntaxKind["CaretEqualsToken"] = 68] = "CaretEqualsToken";
-        // Identifiers
-        SyntaxKind[SyntaxKind["Identifier"] = 69] = "Identifier";
-        // Reserved words
-        SyntaxKind[SyntaxKind["BreakKeyword"] = 70] = "BreakKeyword";
-        SyntaxKind[SyntaxKind["CaseKeyword"] = 71] = "CaseKeyword";
-        SyntaxKind[SyntaxKind["CatchKeyword"] = 72] = "CatchKeyword";
-        SyntaxKind[SyntaxKind["ClassKeyword"] = 73] = "ClassKeyword";
-        SyntaxKind[SyntaxKind["ConstKeyword"] = 74] = "ConstKeyword";
-        SyntaxKind[SyntaxKind["ContinueKeyword"] = 75] = "ContinueKeyword";
-        SyntaxKind[SyntaxKind["DebuggerKeyword"] = 76] = "DebuggerKeyword";
-        SyntaxKind[SyntaxKind["DefaultKeyword"] = 77] = "DefaultKeyword";
-        SyntaxKind[SyntaxKind["DeleteKeyword"] = 78] = "DeleteKeyword";
-        SyntaxKind[SyntaxKind["DoKeyword"] = 79] = "DoKeyword";
-        SyntaxKind[SyntaxKind["ElseKeyword"] = 80] = "ElseKeyword";
-        SyntaxKind[SyntaxKind["EnumKeyword"] = 81] = "EnumKeyword";
-        SyntaxKind[SyntaxKind["ExportKeyword"] = 82] = "ExportKeyword";
-        SyntaxKind[SyntaxKind["ExtendsKeyword"] = 83] = "ExtendsKeyword";
-        SyntaxKind[SyntaxKind["FalseKeyword"] = 84] = "FalseKeyword";
-        SyntaxKind[SyntaxKind["FinallyKeyword"] = 85] = "FinallyKeyword";
-        SyntaxKind[SyntaxKind["ForKeyword"] = 86] = "ForKeyword";
-        SyntaxKind[SyntaxKind["FunctionKeyword"] = 87] = "FunctionKeyword";
-        SyntaxKind[SyntaxKind["IfKeyword"] = 88] = "IfKeyword";
-        SyntaxKind[SyntaxKind["ImportKeyword"] = 89] = "ImportKeyword";
-        SyntaxKind[SyntaxKind["InKeyword"] = 90] = "InKeyword";
-        SyntaxKind[SyntaxKind["InstanceOfKeyword"] = 91] = "InstanceOfKeyword";
-        SyntaxKind[SyntaxKind["NewKeyword"] = 92] = "NewKeyword";
-        SyntaxKind[SyntaxKind["NullKeyword"] = 93] = "NullKeyword";
-        SyntaxKind[SyntaxKind["ReturnKeyword"] = 94] = "ReturnKeyword";
-        SyntaxKind[SyntaxKind["SuperKeyword"] = 95] = "SuperKeyword";
-        SyntaxKind[SyntaxKind["SwitchKeyword"] = 96] = "SwitchKeyword";
-        SyntaxKind[SyntaxKind["ThisKeyword"] = 97] = "ThisKeyword";
-        SyntaxKind[SyntaxKind["ThrowKeyword"] = 98] = "ThrowKeyword";
-        SyntaxKind[SyntaxKind["TrueKeyword"] = 99] = "TrueKeyword";
-        SyntaxKind[SyntaxKind["TryKeyword"] = 100] = "TryKeyword";
-        SyntaxKind[SyntaxKind["TypeOfKeyword"] = 101] = "TypeOfKeyword";
-        SyntaxKind[SyntaxKind["VarKeyword"] = 102] = "VarKeyword";
-        SyntaxKind[SyntaxKind["VoidKeyword"] = 103] = "VoidKeyword";
-        SyntaxKind[SyntaxKind["WhileKeyword"] = 104] = "WhileKeyword";
-        SyntaxKind[SyntaxKind["WithKeyword"] = 105] = "WithKeyword";
-        // Strict mode reserved words
-        SyntaxKind[SyntaxKind["ImplementsKeyword"] = 106] = "ImplementsKeyword";
-        SyntaxKind[SyntaxKind["InterfaceKeyword"] = 107] = "InterfaceKeyword";
-        SyntaxKind[SyntaxKind["LetKeyword"] = 108] = "LetKeyword";
-        SyntaxKind[SyntaxKind["PackageKeyword"] = 109] = "PackageKeyword";
-        SyntaxKind[SyntaxKind["PrivateKeyword"] = 110] = "PrivateKeyword";
-        SyntaxKind[SyntaxKind["ProtectedKeyword"] = 111] = "ProtectedKeyword";
-        SyntaxKind[SyntaxKind["PublicKeyword"] = 112] = "PublicKeyword";
-        SyntaxKind[SyntaxKind["StaticKeyword"] = 113] = "StaticKeyword";
-        SyntaxKind[SyntaxKind["YieldKeyword"] = 114] = "YieldKeyword";
-        // Contextual keywords
-        SyntaxKind[SyntaxKind["AbstractKeyword"] = 115] = "AbstractKeyword";
-        SyntaxKind[SyntaxKind["AsKeyword"] = 116] = "AsKeyword";
-        SyntaxKind[SyntaxKind["AnyKeyword"] = 117] = "AnyKeyword";
-        SyntaxKind[SyntaxKind["AsyncKeyword"] = 118] = "AsyncKeyword";
-        SyntaxKind[SyntaxKind["AwaitKeyword"] = 119] = "AwaitKeyword";
-        SyntaxKind[SyntaxKind["BooleanKeyword"] = 120] = "BooleanKeyword";
-        SyntaxKind[SyntaxKind["ConstructorKeyword"] = 121] = "ConstructorKeyword";
-        SyntaxKind[SyntaxKind["DeclareKeyword"] = 122] = "DeclareKeyword";
-        SyntaxKind[SyntaxKind["GetKeyword"] = 123] = "GetKeyword";
-        SyntaxKind[SyntaxKind["IsKeyword"] = 124] = "IsKeyword";
-        SyntaxKind[SyntaxKind["ModuleKeyword"] = 125] = "ModuleKeyword";
-        SyntaxKind[SyntaxKind["NamespaceKeyword"] = 126] = "NamespaceKeyword";
-        SyntaxKind[SyntaxKind["NeverKeyword"] = 127] = "NeverKeyword";
-        SyntaxKind[SyntaxKind["ReadonlyKeyword"] = 128] = "ReadonlyKeyword";
-        SyntaxKind[SyntaxKind["RequireKeyword"] = 129] = "RequireKeyword";
-        SyntaxKind[SyntaxKind["NumberKeyword"] = 130] = "NumberKeyword";
-        SyntaxKind[SyntaxKind["SetKeyword"] = 131] = "SetKeyword";
-        SyntaxKind[SyntaxKind["StringKeyword"] = 132] = "StringKeyword";
-        SyntaxKind[SyntaxKind["SymbolKeyword"] = 133] = "SymbolKeyword";
-        SyntaxKind[SyntaxKind["TypeKeyword"] = 134] = "TypeKeyword";
-        SyntaxKind[SyntaxKind["UndefinedKeyword"] = 135] = "UndefinedKeyword";
-        SyntaxKind[SyntaxKind["FromKeyword"] = 136] = "FromKeyword";
-        SyntaxKind[SyntaxKind["GlobalKeyword"] = 137] = "GlobalKeyword";
-        SyntaxKind[SyntaxKind["OfKeyword"] = 138] = "OfKeyword";
-        // Parse tree nodes
-        // Names
-        SyntaxKind[SyntaxKind["QualifiedName"] = 139] = "QualifiedName";
-        SyntaxKind[SyntaxKind["ComputedPropertyName"] = 140] = "ComputedPropertyName";
-        // Signature elements
-        SyntaxKind[SyntaxKind["TypeParameter"] = 141] = "TypeParameter";
-        SyntaxKind[SyntaxKind["Parameter"] = 142] = "Parameter";
-        SyntaxKind[SyntaxKind["Decorator"] = 143] = "Decorator";
-        // TypeMember
-        SyntaxKind[SyntaxKind["PropertySignature"] = 144] = "PropertySignature";
-        SyntaxKind[SyntaxKind["PropertyDeclaration"] = 145] = "PropertyDeclaration";
-        SyntaxKind[SyntaxKind["MethodSignature"] = 146] = "MethodSignature";
-        SyntaxKind[SyntaxKind["MethodDeclaration"] = 147] = "MethodDeclaration";
-        SyntaxKind[SyntaxKind["Constructor"] = 148] = "Constructor";
-        SyntaxKind[SyntaxKind["GetAccessor"] = 149] = "GetAccessor";
-        SyntaxKind[SyntaxKind["SetAccessor"] = 150] = "SetAccessor";
-        SyntaxKind[SyntaxKind["CallSignature"] = 151] = "CallSignature";
-        SyntaxKind[SyntaxKind["ConstructSignature"] = 152] = "ConstructSignature";
-        SyntaxKind[SyntaxKind["IndexSignature"] = 153] = "IndexSignature";
-        // Type
-        SyntaxKind[SyntaxKind["TypePredicate"] = 154] = "TypePredicate";
-        SyntaxKind[SyntaxKind["TypeReference"] = 155] = "TypeReference";
-        SyntaxKind[SyntaxKind["FunctionType"] = 156] = "FunctionType";
-        SyntaxKind[SyntaxKind["ConstructorType"] = 157] = "ConstructorType";
-        SyntaxKind[SyntaxKind["TypeQuery"] = 158] = "TypeQuery";
-        SyntaxKind[SyntaxKind["TypeLiteral"] = 159] = "TypeLiteral";
-        SyntaxKind[SyntaxKind["ArrayType"] = 160] = "ArrayType";
-        SyntaxKind[SyntaxKind["TupleType"] = 161] = "TupleType";
-        SyntaxKind[SyntaxKind["UnionType"] = 162] = "UnionType";
-        SyntaxKind[SyntaxKind["IntersectionType"] = 163] = "IntersectionType";
-        SyntaxKind[SyntaxKind["ParenthesizedType"] = 164] = "ParenthesizedType";
-        SyntaxKind[SyntaxKind["ThisType"] = 165] = "ThisType";
-        SyntaxKind[SyntaxKind["StringLiteralType"] = 166] = "StringLiteralType";
-        // Binding patterns
-        SyntaxKind[SyntaxKind["ObjectBindingPattern"] = 167] = "ObjectBindingPattern";
-        SyntaxKind[SyntaxKind["ArrayBindingPattern"] = 168] = "ArrayBindingPattern";
-        SyntaxKind[SyntaxKind["BindingElement"] = 169] = "BindingElement";
-        // Expression
-        SyntaxKind[SyntaxKind["ArrayLiteralExpression"] = 170] = "ArrayLiteralExpression";
-        SyntaxKind[SyntaxKind["ObjectLiteralExpression"] = 171] = "ObjectLiteralExpression";
-        SyntaxKind[SyntaxKind["PropertyAccessExpression"] = 172] = "PropertyAccessExpression";
-        SyntaxKind[SyntaxKind["ElementAccessExpression"] = 173] = "ElementAccessExpression";
-        SyntaxKind[SyntaxKind["CallExpression"] = 174] = "CallExpression";
-        SyntaxKind[SyntaxKind["NewExpression"] = 175] = "NewExpression";
-        SyntaxKind[SyntaxKind["TaggedTemplateExpression"] = 176] = "TaggedTemplateExpression";
-        SyntaxKind[SyntaxKind["TypeAssertionExpression"] = 177] = "TypeAssertionExpression";
-        SyntaxKind[SyntaxKind["ParenthesizedExpression"] = 178] = "ParenthesizedExpression";
-        SyntaxKind[SyntaxKind["FunctionExpression"] = 179] = "FunctionExpression";
-        SyntaxKind[SyntaxKind["ArrowFunction"] = 180] = "ArrowFunction";
-        SyntaxKind[SyntaxKind["DeleteExpression"] = 181] = "DeleteExpression";
-        SyntaxKind[SyntaxKind["TypeOfExpression"] = 182] = "TypeOfExpression";
-        SyntaxKind[SyntaxKind["VoidExpression"] = 183] = "VoidExpression";
-        SyntaxKind[SyntaxKind["AwaitExpression"] = 184] = "AwaitExpression";
-        SyntaxKind[SyntaxKind["PrefixUnaryExpression"] = 185] = "PrefixUnaryExpression";
-        SyntaxKind[SyntaxKind["PostfixUnaryExpression"] = 186] = "PostfixUnaryExpression";
-        SyntaxKind[SyntaxKind["BinaryExpression"] = 187] = "BinaryExpression";
-        SyntaxKind[SyntaxKind["ConditionalExpression"] = 188] = "ConditionalExpression";
-        SyntaxKind[SyntaxKind["TemplateExpression"] = 189] = "TemplateExpression";
-        SyntaxKind[SyntaxKind["YieldExpression"] = 190] = "YieldExpression";
-        SyntaxKind[SyntaxKind["SpreadElementExpression"] = 191] = "SpreadElementExpression";
-        SyntaxKind[SyntaxKind["ClassExpression"] = 192] = "ClassExpression";
-        SyntaxKind[SyntaxKind["OmittedExpression"] = 193] = "OmittedExpression";
-        SyntaxKind[SyntaxKind["ExpressionWithTypeArguments"] = 194] = "ExpressionWithTypeArguments";
-        SyntaxKind[SyntaxKind["AsExpression"] = 195] = "AsExpression";
-        SyntaxKind[SyntaxKind["NonNullExpression"] = 196] = "NonNullExpression";
-        // Misc
-        SyntaxKind[SyntaxKind["TemplateSpan"] = 197] = "TemplateSpan";
-        SyntaxKind[SyntaxKind["SemicolonClassElement"] = 198] = "SemicolonClassElement";
-        // Element
-        SyntaxKind[SyntaxKind["Block"] = 199] = "Block";
-        SyntaxKind[SyntaxKind["VariableStatement"] = 200] = "VariableStatement";
-        SyntaxKind[SyntaxKind["EmptyStatement"] = 201] = "EmptyStatement";
-        SyntaxKind[SyntaxKind["ExpressionStatement"] = 202] = "ExpressionStatement";
-        SyntaxKind[SyntaxKind["IfStatement"] = 203] = "IfStatement";
-        SyntaxKind[SyntaxKind["DoStatement"] = 204] = "DoStatement";
-        SyntaxKind[SyntaxKind["WhileStatement"] = 205] = "WhileStatement";
-        SyntaxKind[SyntaxKind["ForStatement"] = 206] = "ForStatement";
-        SyntaxKind[SyntaxKind["ForInStatement"] = 207] = "ForInStatement";
-        SyntaxKind[SyntaxKind["ForOfStatement"] = 208] = "ForOfStatement";
-        SyntaxKind[SyntaxKind["ContinueStatement"] = 209] = "ContinueStatement";
-        SyntaxKind[SyntaxKind["BreakStatement"] = 210] = "BreakStatement";
-        SyntaxKind[SyntaxKind["ReturnStatement"] = 211] = "ReturnStatement";
-        SyntaxKind[SyntaxKind["WithStatement"] = 212] = "WithStatement";
-        SyntaxKind[SyntaxKind["SwitchStatement"] = 213] = "SwitchStatement";
-        SyntaxKind[SyntaxKind["LabeledStatement"] = 214] = "LabeledStatement";
-        SyntaxKind[SyntaxKind["ThrowStatement"] = 215] = "ThrowStatement";
-        SyntaxKind[SyntaxKind["TryStatement"] = 216] = "TryStatement";
-        SyntaxKind[SyntaxKind["DebuggerStatement"] = 217] = "DebuggerStatement";
-        SyntaxKind[SyntaxKind["VariableDeclaration"] = 218] = "VariableDeclaration";
-        SyntaxKind[SyntaxKind["VariableDeclarationList"] = 219] = "VariableDeclarationList";
-        SyntaxKind[SyntaxKind["FunctionDeclaration"] = 220] = "FunctionDeclaration";
-        SyntaxKind[SyntaxKind["ClassDeclaration"] = 221] = "ClassDeclaration";
-        SyntaxKind[SyntaxKind["InterfaceDeclaration"] = 222] = "InterfaceDeclaration";
-        SyntaxKind[SyntaxKind["TypeAliasDeclaration"] = 223] = "TypeAliasDeclaration";
-        SyntaxKind[SyntaxKind["EnumDeclaration"] = 224] = "EnumDeclaration";
-        SyntaxKind[SyntaxKind["ModuleDeclaration"] = 225] = "ModuleDeclaration";
-        SyntaxKind[SyntaxKind["ModuleBlock"] = 226] = "ModuleBlock";
-        SyntaxKind[SyntaxKind["CaseBlock"] = 227] = "CaseBlock";
-        SyntaxKind[SyntaxKind["NamespaceExportDeclaration"] = 228] = "NamespaceExportDeclaration";
-        SyntaxKind[SyntaxKind["ImportEqualsDeclaration"] = 229] = "ImportEqualsDeclaration";
-        SyntaxKind[SyntaxKind["ImportDeclaration"] = 230] = "ImportDeclaration";
-        SyntaxKind[SyntaxKind["ImportClause"] = 231] = "ImportClause";
-        SyntaxKind[SyntaxKind["NamespaceImport"] = 232] = "NamespaceImport";
-        SyntaxKind[SyntaxKind["NamedImports"] = 233] = "NamedImports";
-        SyntaxKind[SyntaxKind["ImportSpecifier"] = 234] = "ImportSpecifier";
-        SyntaxKind[SyntaxKind["ExportAssignment"] = 235] = "ExportAssignment";
-        SyntaxKind[SyntaxKind["ExportDeclaration"] = 236] = "ExportDeclaration";
-        SyntaxKind[SyntaxKind["NamedExports"] = 237] = "NamedExports";
-        SyntaxKind[SyntaxKind["ExportSpecifier"] = 238] = "ExportSpecifier";
-        SyntaxKind[SyntaxKind["MissingDeclaration"] = 239] = "MissingDeclaration";
-        // Module references
-        SyntaxKind[SyntaxKind["ExternalModuleReference"] = 240] = "ExternalModuleReference";
-        // JSX
-        SyntaxKind[SyntaxKind["JsxElement"] = 241] = "JsxElement";
-        SyntaxKind[SyntaxKind["JsxSelfClosingElement"] = 242] = "JsxSelfClosingElement";
-        SyntaxKind[SyntaxKind["JsxOpeningElement"] = 243] = "JsxOpeningElement";
-        SyntaxKind[SyntaxKind["JsxText"] = 244] = "JsxText";
-        SyntaxKind[SyntaxKind["JsxClosingElement"] = 245] = "JsxClosingElement";
-        SyntaxKind[SyntaxKind["JsxAttribute"] = 246] = "JsxAttribute";
-        SyntaxKind[SyntaxKind["JsxSpreadAttribute"] = 247] = "JsxSpreadAttribute";
-        SyntaxKind[SyntaxKind["JsxExpression"] = 248] = "JsxExpression";
-        // Clauses
-        SyntaxKind[SyntaxKind["CaseClause"] = 249] = "CaseClause";
-        SyntaxKind[SyntaxKind["DefaultClause"] = 250] = "DefaultClause";
-        SyntaxKind[SyntaxKind["HeritageClause"] = 251] = "HeritageClause";
-        SyntaxKind[SyntaxKind["CatchClause"] = 252] = "CatchClause";
-        // Property assignments
-        SyntaxKind[SyntaxKind["PropertyAssignment"] = 253] = "PropertyAssignment";
-        SyntaxKind[SyntaxKind["ShorthandPropertyAssignment"] = 254] = "ShorthandPropertyAssignment";
-        // Enum
-        SyntaxKind[SyntaxKind["EnumMember"] = 255] = "EnumMember";
-        // Top-level nodes
-        SyntaxKind[SyntaxKind["SourceFile"] = 256] = "SourceFile";
-        // JSDoc nodes
-        SyntaxKind[SyntaxKind["JSDocTypeExpression"] = 257] = "JSDocTypeExpression";
-        // The * type
-        SyntaxKind[SyntaxKind["JSDocAllType"] = 258] = "JSDocAllType";
-        // The ? type
-        SyntaxKind[SyntaxKind["JSDocUnknownType"] = 259] = "JSDocUnknownType";
-        SyntaxKind[SyntaxKind["JSDocArrayType"] = 260] = "JSDocArrayType";
-        SyntaxKind[SyntaxKind["JSDocUnionType"] = 261] = "JSDocUnionType";
-        SyntaxKind[SyntaxKind["JSDocTupleType"] = 262] = "JSDocTupleType";
-        SyntaxKind[SyntaxKind["JSDocNullableType"] = 263] = "JSDocNullableType";
-        SyntaxKind[SyntaxKind["JSDocNonNullableType"] = 264] = "JSDocNonNullableType";
-        SyntaxKind[SyntaxKind["JSDocRecordType"] = 265] = "JSDocRecordType";
-        SyntaxKind[SyntaxKind["JSDocRecordMember"] = 266] = "JSDocRecordMember";
-        SyntaxKind[SyntaxKind["JSDocTypeReference"] = 267] = "JSDocTypeReference";
-        SyntaxKind[SyntaxKind["JSDocOptionalType"] = 268] = "JSDocOptionalType";
-        SyntaxKind[SyntaxKind["JSDocFunctionType"] = 269] = "JSDocFunctionType";
-        SyntaxKind[SyntaxKind["JSDocVariadicType"] = 270] = "JSDocVariadicType";
-        SyntaxKind[SyntaxKind["JSDocConstructorType"] = 271] = "JSDocConstructorType";
-        SyntaxKind[SyntaxKind["JSDocThisType"] = 272] = "JSDocThisType";
-        SyntaxKind[SyntaxKind["JSDocComment"] = 273] = "JSDocComment";
-        SyntaxKind[SyntaxKind["JSDocTag"] = 274] = "JSDocTag";
-        SyntaxKind[SyntaxKind["JSDocParameterTag"] = 275] = "JSDocParameterTag";
-        SyntaxKind[SyntaxKind["JSDocReturnTag"] = 276] = "JSDocReturnTag";
-        SyntaxKind[SyntaxKind["JSDocTypeTag"] = 277] = "JSDocTypeTag";
-        SyntaxKind[SyntaxKind["JSDocTemplateTag"] = 278] = "JSDocTemplateTag";
-        // Synthesized list
-        SyntaxKind[SyntaxKind["SyntaxList"] = 279] = "SyntaxList";
-        // Enum value count
-        SyntaxKind[SyntaxKind["Count"] = 280] = "Count";
-        // Markers
-        SyntaxKind[SyntaxKind["FirstAssignment"] = 56] = "FirstAssignment";
-        SyntaxKind[SyntaxKind["LastAssignment"] = 68] = "LastAssignment";
-        SyntaxKind[SyntaxKind["FirstReservedWord"] = 70] = "FirstReservedWord";
-        SyntaxKind[SyntaxKind["LastReservedWord"] = 105] = "LastReservedWord";
-        SyntaxKind[SyntaxKind["FirstKeyword"] = 70] = "FirstKeyword";
-        SyntaxKind[SyntaxKind["LastKeyword"] = 138] = "LastKeyword";
-        SyntaxKind[SyntaxKind["FirstFutureReservedWord"] = 106] = "FirstFutureReservedWord";
-        SyntaxKind[SyntaxKind["LastFutureReservedWord"] = 114] = "LastFutureReservedWord";
-        SyntaxKind[SyntaxKind["FirstTypeNode"] = 154] = "FirstTypeNode";
-        SyntaxKind[SyntaxKind["LastTypeNode"] = 166] = "LastTypeNode";
-        SyntaxKind[SyntaxKind["FirstPunctuation"] = 15] = "FirstPunctuation";
-        SyntaxKind[SyntaxKind["LastPunctuation"] = 68] = "LastPunctuation";
-        SyntaxKind[SyntaxKind["FirstToken"] = 0] = "FirstToken";
-        SyntaxKind[SyntaxKind["LastToken"] = 138] = "LastToken";
-        SyntaxKind[SyntaxKind["FirstTriviaToken"] = 2] = "FirstTriviaToken";
-        SyntaxKind[SyntaxKind["LastTriviaToken"] = 7] = "LastTriviaToken";
-        SyntaxKind[SyntaxKind["FirstLiteralToken"] = 8] = "FirstLiteralToken";
-        SyntaxKind[SyntaxKind["LastLiteralToken"] = 11] = "LastLiteralToken";
-        SyntaxKind[SyntaxKind["FirstTemplateToken"] = 11] = "FirstTemplateToken";
-        SyntaxKind[SyntaxKind["LastTemplateToken"] = 14] = "LastTemplateToken";
-        SyntaxKind[SyntaxKind["FirstBinaryOperator"] = 25] = "FirstBinaryOperator";
-        SyntaxKind[SyntaxKind["LastBinaryOperator"] = 68] = "LastBinaryOperator";
-        SyntaxKind[SyntaxKind["FirstNode"] = 139] = "FirstNode";
-    })(ts.SyntaxKind || (ts.SyntaxKind = {}));
-    var SyntaxKind = ts.SyntaxKind;
-    (function (NodeFlags) {
-        NodeFlags[NodeFlags["None"] = 0] = "None";
-        NodeFlags[NodeFlags["Export"] = 1] = "Export";
-        NodeFlags[NodeFlags["Ambient"] = 2] = "Ambient";
-        NodeFlags[NodeFlags["Public"] = 4] = "Public";
-        NodeFlags[NodeFlags["Private"] = 8] = "Private";
-        NodeFlags[NodeFlags["Protected"] = 16] = "Protected";
-        NodeFlags[NodeFlags["Static"] = 32] = "Static";
-        NodeFlags[NodeFlags["Readonly"] = 64] = "Readonly";
-        NodeFlags[NodeFlags["Abstract"] = 128] = "Abstract";
-        NodeFlags[NodeFlags["Async"] = 256] = "Async";
-        NodeFlags[NodeFlags["Default"] = 512] = "Default";
-        NodeFlags[NodeFlags["Let"] = 1024] = "Let";
-        NodeFlags[NodeFlags["Const"] = 2048] = "Const";
-        NodeFlags[NodeFlags["Namespace"] = 4096] = "Namespace";
-        NodeFlags[NodeFlags["ExportContext"] = 8192] = "ExportContext";
-        NodeFlags[NodeFlags["ContainsThis"] = 16384] = "ContainsThis";
-        NodeFlags[NodeFlags["HasImplicitReturn"] = 32768] = "HasImplicitReturn";
-        NodeFlags[NodeFlags["HasExplicitReturn"] = 65536] = "HasExplicitReturn";
-        NodeFlags[NodeFlags["GlobalAugmentation"] = 131072] = "GlobalAugmentation";
-        NodeFlags[NodeFlags["HasClassExtends"] = 262144] = "HasClassExtends";
-        NodeFlags[NodeFlags["HasDecorators"] = 524288] = "HasDecorators";
-        NodeFlags[NodeFlags["HasParamDecorators"] = 1048576] = "HasParamDecorators";
-        NodeFlags[NodeFlags["HasAsyncFunctions"] = 2097152] = "HasAsyncFunctions";
-        NodeFlags[NodeFlags["DisallowInContext"] = 4194304] = "DisallowInContext";
-        NodeFlags[NodeFlags["YieldContext"] = 8388608] = "YieldContext";
-        NodeFlags[NodeFlags["DecoratorContext"] = 16777216] = "DecoratorContext";
-        NodeFlags[NodeFlags["AwaitContext"] = 33554432] = "AwaitContext";
-        NodeFlags[NodeFlags["ThisNodeHasError"] = 67108864] = "ThisNodeHasError";
-        NodeFlags[NodeFlags["JavaScriptFile"] = 134217728] = "JavaScriptFile";
-        NodeFlags[NodeFlags["ThisNodeOrAnySubNodesHasError"] = 268435456] = "ThisNodeOrAnySubNodesHasError";
-        NodeFlags[NodeFlags["HasAggregatedChildData"] = 536870912] = "HasAggregatedChildData";
-        NodeFlags[NodeFlags["HasJsxSpreadAttribute"] = 1073741824] = "HasJsxSpreadAttribute";
-        NodeFlags[NodeFlags["Modifier"] = 1023] = "Modifier";
-        NodeFlags[NodeFlags["AccessibilityModifier"] = 28] = "AccessibilityModifier";
-        // Accessibility modifiers and 'readonly' can be attached to a parameter in a constructor to make it a property.
-        NodeFlags[NodeFlags["ParameterPropertyModifier"] = 92] = "ParameterPropertyModifier";
-        NodeFlags[NodeFlags["BlockScoped"] = 3072] = "BlockScoped";
-        NodeFlags[NodeFlags["ReachabilityCheckFlags"] = 98304] = "ReachabilityCheckFlags";
-        NodeFlags[NodeFlags["EmitHelperFlags"] = 3932160] = "EmitHelperFlags";
-        // Parsing context flags
-        NodeFlags[NodeFlags["ContextFlags"] = 197132288] = "ContextFlags";
-        // Exclude these flags when parsing a Type
-        NodeFlags[NodeFlags["TypeExcludesFlags"] = 41943040] = "TypeExcludesFlags";
-    })(ts.NodeFlags || (ts.NodeFlags = {}));
-    var NodeFlags = ts.NodeFlags;
-    (function (JsxFlags) {
-        JsxFlags[JsxFlags["None"] = 0] = "None";
-        /** An element from a named property of the JSX.IntrinsicElements interface */
-        JsxFlags[JsxFlags["IntrinsicNamedElement"] = 1] = "IntrinsicNamedElement";
-        /** An element inferred from the string index signature of the JSX.IntrinsicElements interface */
-        JsxFlags[JsxFlags["IntrinsicIndexedElement"] = 2] = "IntrinsicIndexedElement";
-        JsxFlags[JsxFlags["IntrinsicElement"] = 3] = "IntrinsicElement";
-    })(ts.JsxFlags || (ts.JsxFlags = {}));
-    var JsxFlags = ts.JsxFlags;
-    /* @internal */
-    (function (RelationComparisonResult) {
-        RelationComparisonResult[RelationComparisonResult["Succeeded"] = 1] = "Succeeded";
-        RelationComparisonResult[RelationComparisonResult["Failed"] = 2] = "Failed";
-        RelationComparisonResult[RelationComparisonResult["FailedAndReported"] = 3] = "FailedAndReported";
-    })(ts.RelationComparisonResult || (ts.RelationComparisonResult = {}));
-    var RelationComparisonResult = ts.RelationComparisonResult;
-    (function (FlowFlags) {
-        FlowFlags[FlowFlags["Unreachable"] = 1] = "Unreachable";
-        FlowFlags[FlowFlags["Start"] = 2] = "Start";
-        FlowFlags[FlowFlags["BranchLabel"] = 4] = "BranchLabel";
-        FlowFlags[FlowFlags["LoopLabel"] = 8] = "LoopLabel";
-        FlowFlags[FlowFlags["Assignment"] = 16] = "Assignment";
-        FlowFlags[FlowFlags["TrueCondition"] = 32] = "TrueCondition";
-        FlowFlags[FlowFlags["FalseCondition"] = 64] = "FalseCondition";
-        FlowFlags[FlowFlags["Referenced"] = 128] = "Referenced";
-        FlowFlags[FlowFlags["Shared"] = 256] = "Shared";
-        FlowFlags[FlowFlags["Label"] = 12] = "Label";
-        FlowFlags[FlowFlags["Condition"] = 96] = "Condition";
-    })(ts.FlowFlags || (ts.FlowFlags = {}));
-    var FlowFlags = ts.FlowFlags;
-    var OperationCanceledException = (function () {
-        function OperationCanceledException() {
-        }
-        return OperationCanceledException;
-    }());
-    ts.OperationCanceledException = OperationCanceledException;
-    /** Return code used by getEmitOutput function to indicate status of the function */
-    (function (ExitStatus) {
-        // Compiler ran successfully.  Either this was a simple do-nothing compilation (for example,
-        // when -version or -help was provided, or this was a normal compilation, no diagnostics
-        // were produced, and all outputs were generated successfully.
-        ExitStatus[ExitStatus["Success"] = 0] = "Success";
-        // Diagnostics were produced and because of them no code was generated.
-        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
-        // Diagnostics were produced and outputs were generated in spite of them.
-        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
-    })(ts.ExitStatus || (ts.ExitStatus = {}));
-    var ExitStatus = ts.ExitStatus;
-    (function (TypeFormatFlags) {
-        TypeFormatFlags[TypeFormatFlags["None"] = 0] = "None";
-        TypeFormatFlags[TypeFormatFlags["WriteArrayAsGenericType"] = 1] = "WriteArrayAsGenericType";
-        TypeFormatFlags[TypeFormatFlags["UseTypeOfFunction"] = 2] = "UseTypeOfFunction";
-        TypeFormatFlags[TypeFormatFlags["NoTruncation"] = 4] = "NoTruncation";
-        TypeFormatFlags[TypeFormatFlags["WriteArrowStyleSignature"] = 8] = "WriteArrowStyleSignature";
-        TypeFormatFlags[TypeFormatFlags["WriteOwnNameForAnyLike"] = 16] = "WriteOwnNameForAnyLike";
-        TypeFormatFlags[TypeFormatFlags["WriteTypeArgumentsOfSignature"] = 32] = "WriteTypeArgumentsOfSignature";
-        TypeFormatFlags[TypeFormatFlags["InElementType"] = 64] = "InElementType";
-        TypeFormatFlags[TypeFormatFlags["UseFullyQualifiedType"] = 128] = "UseFullyQualifiedType";
-        TypeFormatFlags[TypeFormatFlags["InFirstTypeArgument"] = 256] = "InFirstTypeArgument";
-    })(ts.TypeFormatFlags || (ts.TypeFormatFlags = {}));
-    var TypeFormatFlags = ts.TypeFormatFlags;
-    (function (SymbolFormatFlags) {
-        SymbolFormatFlags[SymbolFormatFlags["None"] = 0] = "None";
-        // Write symbols's type argument if it is instantiated symbol
-        // eg. class C<T> { p: T }   <-- Show p as C<T>.p here
-        //     var a: C<number>;
-        //     var p = a.p;  <--- Here p is property of C<number> so show it as C<number>.p instead of just C.p
-        SymbolFormatFlags[SymbolFormatFlags["WriteTypeParametersOrArguments"] = 1] = "WriteTypeParametersOrArguments";
-        // Use only external alias information to get the symbol name in the given context
-        // eg.  module m { export class c { } } import x = m.c;
-        // When this flag is specified m.c will be used to refer to the class instead of alias symbol x
-        SymbolFormatFlags[SymbolFormatFlags["UseOnlyExternalAliasing"] = 2] = "UseOnlyExternalAliasing";
-    })(ts.SymbolFormatFlags || (ts.SymbolFormatFlags = {}));
-    var SymbolFormatFlags = ts.SymbolFormatFlags;
-    /* @internal */
-    (function (SymbolAccessibility) {
-        SymbolAccessibility[SymbolAccessibility["Accessible"] = 0] = "Accessible";
-        SymbolAccessibility[SymbolAccessibility["NotAccessible"] = 1] = "NotAccessible";
-        SymbolAccessibility[SymbolAccessibility["CannotBeNamed"] = 2] = "CannotBeNamed";
-    })(ts.SymbolAccessibility || (ts.SymbolAccessibility = {}));
-    var SymbolAccessibility = ts.SymbolAccessibility;
-    (function (TypePredicateKind) {
-        TypePredicateKind[TypePredicateKind["This"] = 0] = "This";
-        TypePredicateKind[TypePredicateKind["Identifier"] = 1] = "Identifier";
-    })(ts.TypePredicateKind || (ts.TypePredicateKind = {}));
-    var TypePredicateKind = ts.TypePredicateKind;
-    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator
-      * metadata */
-    /* @internal */
-    (function (TypeReferenceSerializationKind) {
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
-        // should be emitted using a safe fallback.
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithConstructSignatureAndValue"] = 1] = "TypeWithConstructSignatureAndValue";
-        // function that can be reached at runtime (e.g. a `class`
-        // declaration or a `var` declaration for the static side
-        // of a type, such as the global `Promise` type in lib.d.ts).
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["VoidType"] = 2] = "VoidType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["NumberLikeType"] = 3] = "NumberLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["StringLikeType"] = 4] = "StringLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["BooleanType"] = 5] = "BooleanType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ArrayLikeType"] = 6] = "ArrayLikeType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ESSymbolType"] = 7] = "ESSymbolType";
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 8] = "TypeWithCallSignature";
-        // with call signatures.
-        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 9] = "ObjectType";
-    })(ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
-    var TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind;
-    (function (SymbolFlags) {
-        SymbolFlags[SymbolFlags["None"] = 0] = "None";
-        SymbolFlags[SymbolFlags["FunctionScopedVariable"] = 1] = "FunctionScopedVariable";
-        SymbolFlags[SymbolFlags["BlockScopedVariable"] = 2] = "BlockScopedVariable";
-        SymbolFlags[SymbolFlags["Property"] = 4] = "Property";
-        SymbolFlags[SymbolFlags["EnumMember"] = 8] = "EnumMember";
-        SymbolFlags[SymbolFlags["Function"] = 16] = "Function";
-        SymbolFlags[SymbolFlags["Class"] = 32] = "Class";
-        SymbolFlags[SymbolFlags["Interface"] = 64] = "Interface";
-        SymbolFlags[SymbolFlags["ConstEnum"] = 128] = "ConstEnum";
-        SymbolFlags[SymbolFlags["RegularEnum"] = 256] = "RegularEnum";
-        SymbolFlags[SymbolFlags["ValueModule"] = 512] = "ValueModule";
-        SymbolFlags[SymbolFlags["NamespaceModule"] = 1024] = "NamespaceModule";
-        SymbolFlags[SymbolFlags["TypeLiteral"] = 2048] = "TypeLiteral";
-        SymbolFlags[SymbolFlags["ObjectLiteral"] = 4096] = "ObjectLiteral";
-        SymbolFlags[SymbolFlags["Method"] = 8192] = "Method";
-        SymbolFlags[SymbolFlags["Constructor"] = 16384] = "Constructor";
-        SymbolFlags[SymbolFlags["GetAccessor"] = 32768] = "GetAccessor";
-        SymbolFlags[SymbolFlags["SetAccessor"] = 65536] = "SetAccessor";
-        SymbolFlags[SymbolFlags["Signature"] = 131072] = "Signature";
-        SymbolFlags[SymbolFlags["TypeParameter"] = 262144] = "TypeParameter";
-        SymbolFlags[SymbolFlags["TypeAlias"] = 524288] = "TypeAlias";
-        SymbolFlags[SymbolFlags["ExportValue"] = 1048576] = "ExportValue";
-        SymbolFlags[SymbolFlags["ExportType"] = 2097152] = "ExportType";
-        SymbolFlags[SymbolFlags["ExportNamespace"] = 4194304] = "ExportNamespace";
-        SymbolFlags[SymbolFlags["Alias"] = 8388608] = "Alias";
-        SymbolFlags[SymbolFlags["Instantiated"] = 16777216] = "Instantiated";
-        SymbolFlags[SymbolFlags["Merged"] = 33554432] = "Merged";
-        SymbolFlags[SymbolFlags["Transient"] = 67108864] = "Transient";
-        SymbolFlags[SymbolFlags["Prototype"] = 134217728] = "Prototype";
-        SymbolFlags[SymbolFlags["SyntheticProperty"] = 268435456] = "SyntheticProperty";
-        SymbolFlags[SymbolFlags["Optional"] = 536870912] = "Optional";
-        SymbolFlags[SymbolFlags["ExportStar"] = 1073741824] = "ExportStar";
-        SymbolFlags[SymbolFlags["Enum"] = 384] = "Enum";
-        SymbolFlags[SymbolFlags["Variable"] = 3] = "Variable";
-        SymbolFlags[SymbolFlags["Value"] = 107455] = "Value";
-        SymbolFlags[SymbolFlags["Type"] = 793056] = "Type";
-        SymbolFlags[SymbolFlags["Namespace"] = 1536] = "Namespace";
-        SymbolFlags[SymbolFlags["Module"] = 1536] = "Module";
-        SymbolFlags[SymbolFlags["Accessor"] = 98304] = "Accessor";
-        // Variables can be redeclared, but can not redeclare a block-scoped declaration with the
-        // same name, or any other value that is not a variable, e.g. ValueModule or Class
-        SymbolFlags[SymbolFlags["FunctionScopedVariableExcludes"] = 107454] = "FunctionScopedVariableExcludes";
-        // Block-scoped declarations are not allowed to be re-declared
-        // they can not merge with anything in the value space
-        SymbolFlags[SymbolFlags["BlockScopedVariableExcludes"] = 107455] = "BlockScopedVariableExcludes";
-        SymbolFlags[SymbolFlags["ParameterExcludes"] = 107455] = "ParameterExcludes";
-        SymbolFlags[SymbolFlags["PropertyExcludes"] = 0] = "PropertyExcludes";
-        SymbolFlags[SymbolFlags["EnumMemberExcludes"] = 107455] = "EnumMemberExcludes";
-        SymbolFlags[SymbolFlags["FunctionExcludes"] = 106927] = "FunctionExcludes";
-        SymbolFlags[SymbolFlags["ClassExcludes"] = 899519] = "ClassExcludes";
-        SymbolFlags[SymbolFlags["InterfaceExcludes"] = 792960] = "InterfaceExcludes";
-        SymbolFlags[SymbolFlags["RegularEnumExcludes"] = 899327] = "RegularEnumExcludes";
-        SymbolFlags[SymbolFlags["ConstEnumExcludes"] = 899967] = "ConstEnumExcludes";
-        SymbolFlags[SymbolFlags["ValueModuleExcludes"] = 106639] = "ValueModuleExcludes";
-        SymbolFlags[SymbolFlags["NamespaceModuleExcludes"] = 0] = "NamespaceModuleExcludes";
-        SymbolFlags[SymbolFlags["MethodExcludes"] = 99263] = "MethodExcludes";
-        SymbolFlags[SymbolFlags["GetAccessorExcludes"] = 41919] = "GetAccessorExcludes";
-        SymbolFlags[SymbolFlags["SetAccessorExcludes"] = 74687] = "SetAccessorExcludes";
-        SymbolFlags[SymbolFlags["TypeParameterExcludes"] = 530912] = "TypeParameterExcludes";
-        SymbolFlags[SymbolFlags["TypeAliasExcludes"] = 793056] = "TypeAliasExcludes";
-        SymbolFlags[SymbolFlags["AliasExcludes"] = 8388608] = "AliasExcludes";
-        SymbolFlags[SymbolFlags["ModuleMember"] = 8914931] = "ModuleMember";
-        SymbolFlags[SymbolFlags["ExportHasLocal"] = 944] = "ExportHasLocal";
-        SymbolFlags[SymbolFlags["HasExports"] = 1952] = "HasExports";
-        SymbolFlags[SymbolFlags["HasMembers"] = 6240] = "HasMembers";
-        SymbolFlags[SymbolFlags["BlockScoped"] = 418] = "BlockScoped";
-        SymbolFlags[SymbolFlags["PropertyOrAccessor"] = 98308] = "PropertyOrAccessor";
-        SymbolFlags[SymbolFlags["Export"] = 7340032] = "Export";
-        /* @internal */
-        // The set of things we consider semantically classifiable.  Used to speed up the LS during
-        // classification.
-        SymbolFlags[SymbolFlags["Classifiable"] = 788448] = "Classifiable";
-    })(ts.SymbolFlags || (ts.SymbolFlags = {}));
-    var SymbolFlags = ts.SymbolFlags;
-    /* @internal */
-    (function (NodeCheckFlags) {
-        NodeCheckFlags[NodeCheckFlags["TypeChecked"] = 1] = "TypeChecked";
-        NodeCheckFlags[NodeCheckFlags["LexicalThis"] = 2] = "LexicalThis";
-        NodeCheckFlags[NodeCheckFlags["CaptureThis"] = 4] = "CaptureThis";
-        NodeCheckFlags[NodeCheckFlags["SuperInstance"] = 256] = "SuperInstance";
-        NodeCheckFlags[NodeCheckFlags["SuperStatic"] = 512] = "SuperStatic";
-        NodeCheckFlags[NodeCheckFlags["ContextChecked"] = 1024] = "ContextChecked";
-        NodeCheckFlags[NodeCheckFlags["AsyncMethodWithSuper"] = 2048] = "AsyncMethodWithSuper";
-        NodeCheckFlags[NodeCheckFlags["AsyncMethodWithSuperBinding"] = 4096] = "AsyncMethodWithSuperBinding";
-        NodeCheckFlags[NodeCheckFlags["CaptureArguments"] = 8192] = "CaptureArguments";
-        NodeCheckFlags[NodeCheckFlags["EnumValuesComputed"] = 16384] = "EnumValuesComputed";
-        NodeCheckFlags[NodeCheckFlags["LexicalModuleMergesWithClass"] = 32768] = "LexicalModuleMergesWithClass";
-        NodeCheckFlags[NodeCheckFlags["LoopWithCapturedBlockScopedBinding"] = 65536] = "LoopWithCapturedBlockScopedBinding";
-        NodeCheckFlags[NodeCheckFlags["CapturedBlockScopedBinding"] = 131072] = "CapturedBlockScopedBinding";
-        NodeCheckFlags[NodeCheckFlags["BlockScopedBindingInLoop"] = 262144] = "BlockScopedBindingInLoop";
-        NodeCheckFlags[NodeCheckFlags["ClassWithBodyScopedClassBinding"] = 524288] = "ClassWithBodyScopedClassBinding";
-        NodeCheckFlags[NodeCheckFlags["BodyScopedClassBinding"] = 1048576] = "BodyScopedClassBinding";
-        NodeCheckFlags[NodeCheckFlags["NeedsLoopOutParameter"] = 2097152] = "NeedsLoopOutParameter";
-    })(ts.NodeCheckFlags || (ts.NodeCheckFlags = {}));
-    var NodeCheckFlags = ts.NodeCheckFlags;
-    (function (TypeFlags) {
-        TypeFlags[TypeFlags["Any"] = 1] = "Any";
-        TypeFlags[TypeFlags["String"] = 2] = "String";
-        TypeFlags[TypeFlags["Number"] = 4] = "Number";
-        TypeFlags[TypeFlags["Boolean"] = 8] = "Boolean";
-        TypeFlags[TypeFlags["Void"] = 16] = "Void";
-        TypeFlags[TypeFlags["Undefined"] = 32] = "Undefined";
-        TypeFlags[TypeFlags["Null"] = 64] = "Null";
-        TypeFlags[TypeFlags["Enum"] = 128] = "Enum";
-        TypeFlags[TypeFlags["StringLiteral"] = 256] = "StringLiteral";
-        TypeFlags[TypeFlags["TypeParameter"] = 512] = "TypeParameter";
-        TypeFlags[TypeFlags["Class"] = 1024] = "Class";
-        TypeFlags[TypeFlags["Interface"] = 2048] = "Interface";
-        TypeFlags[TypeFlags["Reference"] = 4096] = "Reference";
-        TypeFlags[TypeFlags["Tuple"] = 8192] = "Tuple";
-        TypeFlags[TypeFlags["Union"] = 16384] = "Union";
-        TypeFlags[TypeFlags["Intersection"] = 32768] = "Intersection";
-        TypeFlags[TypeFlags["Anonymous"] = 65536] = "Anonymous";
-        TypeFlags[TypeFlags["Instantiated"] = 131072] = "Instantiated";
-        /* @internal */
-        TypeFlags[TypeFlags["FromSignature"] = 262144] = "FromSignature";
-        TypeFlags[TypeFlags["ObjectLiteral"] = 524288] = "ObjectLiteral";
-        /* @internal */
-        TypeFlags[TypeFlags["FreshObjectLiteral"] = 1048576] = "FreshObjectLiteral";
-        /* @internal */
-        TypeFlags[TypeFlags["ContainsUndefinedOrNull"] = 2097152] = "ContainsUndefinedOrNull";
-        /* @internal */
-        TypeFlags[TypeFlags["ContainsObjectLiteral"] = 4194304] = "ContainsObjectLiteral";
-        /* @internal */
-        TypeFlags[TypeFlags["ContainsAnyFunctionType"] = 8388608] = "ContainsAnyFunctionType";
-        TypeFlags[TypeFlags["ESSymbol"] = 16777216] = "ESSymbol";
-        TypeFlags[TypeFlags["ThisType"] = 33554432] = "ThisType";
-        TypeFlags[TypeFlags["ObjectLiteralPatternWithComputedProperties"] = 67108864] = "ObjectLiteralPatternWithComputedProperties";
-        TypeFlags[TypeFlags["Never"] = 134217728] = "Never";
-        /* @internal */
-        TypeFlags[TypeFlags["Nullable"] = 96] = "Nullable";
-        /* @internal */
-        TypeFlags[TypeFlags["Intrinsic"] = 150995071] = "Intrinsic";
-        /* @internal */
-        TypeFlags[TypeFlags["Primitive"] = 16777726] = "Primitive";
-        TypeFlags[TypeFlags["StringLike"] = 258] = "StringLike";
-        TypeFlags[TypeFlags["NumberLike"] = 132] = "NumberLike";
-        TypeFlags[TypeFlags["ObjectType"] = 80896] = "ObjectType";
-        TypeFlags[TypeFlags["UnionOrIntersection"] = 49152] = "UnionOrIntersection";
-        TypeFlags[TypeFlags["StructuredType"] = 130048] = "StructuredType";
-        TypeFlags[TypeFlags["Narrowable"] = 97793] = "Narrowable";
-        /* @internal */
-        TypeFlags[TypeFlags["RequiresWidening"] = 6291456] = "RequiresWidening";
-        /* @internal */
-        TypeFlags[TypeFlags["PropagatingFlags"] = 14680064] = "PropagatingFlags";
-    })(ts.TypeFlags || (ts.TypeFlags = {}));
-    var TypeFlags = ts.TypeFlags;
-    (function (SignatureKind) {
-        SignatureKind[SignatureKind["Call"] = 0] = "Call";
-        SignatureKind[SignatureKind["Construct"] = 1] = "Construct";
-    })(ts.SignatureKind || (ts.SignatureKind = {}));
-    var SignatureKind = ts.SignatureKind;
-    (function (IndexKind) {
-        IndexKind[IndexKind["String"] = 0] = "String";
-        IndexKind[IndexKind["Number"] = 1] = "Number";
-    })(ts.IndexKind || (ts.IndexKind = {}));
-    var IndexKind = ts.IndexKind;
-    /* @internal */
-    (function (SpecialPropertyAssignmentKind) {
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["None"] = 0] = "None";
-        /// exports.name = expr
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ExportsProperty"] = 1] = "ExportsProperty";
-        /// module.exports = expr
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ModuleExports"] = 2] = "ModuleExports";
-        /// className.prototype.name = expr
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["PrototypeProperty"] = 3] = "PrototypeProperty";
-        /// this.name = expr
-        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ThisProperty"] = 4] = "ThisProperty";
-    })(ts.SpecialPropertyAssignmentKind || (ts.SpecialPropertyAssignmentKind = {}));
-    var SpecialPropertyAssignmentKind = ts.SpecialPropertyAssignmentKind;
-    (function (DiagnosticCategory) {
-        DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
-        DiagnosticCategory[DiagnosticCategory["Error"] = 1] = "Error";
-        DiagnosticCategory[DiagnosticCategory["Message"] = 2] = "Message";
-    })(ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
-    var DiagnosticCategory = ts.DiagnosticCategory;
-    (function (ModuleResolutionKind) {
-        ModuleResolutionKind[ModuleResolutionKind["Classic"] = 1] = "Classic";
-        ModuleResolutionKind[ModuleResolutionKind["NodeJs"] = 2] = "NodeJs";
-    })(ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
-    var ModuleResolutionKind = ts.ModuleResolutionKind;
-    (function (ModuleKind) {
-        ModuleKind[ModuleKind["None"] = 0] = "None";
-        ModuleKind[ModuleKind["CommonJS"] = 1] = "CommonJS";
-        ModuleKind[ModuleKind["AMD"] = 2] = "AMD";
-        ModuleKind[ModuleKind["UMD"] = 3] = "UMD";
-        ModuleKind[ModuleKind["System"] = 4] = "System";
-        ModuleKind[ModuleKind["ES6"] = 5] = "ES6";
-        ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
-    })(ts.ModuleKind || (ts.ModuleKind = {}));
-    var ModuleKind = ts.ModuleKind;
-    (function (JsxEmit) {
-        JsxEmit[JsxEmit["None"] = 0] = "None";
-        JsxEmit[JsxEmit["Preserve"] = 1] = "Preserve";
-        JsxEmit[JsxEmit["React"] = 2] = "React";
-    })(ts.JsxEmit || (ts.JsxEmit = {}));
-    var JsxEmit = ts.JsxEmit;
-    (function (NewLineKind) {
-        NewLineKind[NewLineKind["CarriageReturnLineFeed"] = 0] = "CarriageReturnLineFeed";
-        NewLineKind[NewLineKind["LineFeed"] = 1] = "LineFeed";
-    })(ts.NewLineKind || (ts.NewLineKind = {}));
-    var NewLineKind = ts.NewLineKind;
-    (function (ScriptKind) {
-        ScriptKind[ScriptKind["Unknown"] = 0] = "Unknown";
-        ScriptKind[ScriptKind["JS"] = 1] = "JS";
-        ScriptKind[ScriptKind["JSX"] = 2] = "JSX";
-        ScriptKind[ScriptKind["TS"] = 3] = "TS";
-        ScriptKind[ScriptKind["TSX"] = 4] = "TSX";
-    })(ts.ScriptKind || (ts.ScriptKind = {}));
-    var ScriptKind = ts.ScriptKind;
-    (function (ScriptTarget) {
-        ScriptTarget[ScriptTarget["ES3"] = 0] = "ES3";
-        ScriptTarget[ScriptTarget["ES5"] = 1] = "ES5";
-        ScriptTarget[ScriptTarget["ES6"] = 2] = "ES6";
-        ScriptTarget[ScriptTarget["ES2015"] = 2] = "ES2015";
-        ScriptTarget[ScriptTarget["Latest"] = 2] = "Latest";
-    })(ts.ScriptTarget || (ts.ScriptTarget = {}));
-    var ScriptTarget = ts.ScriptTarget;
-    (function (LanguageVariant) {
-        LanguageVariant[LanguageVariant["Standard"] = 0] = "Standard";
-        LanguageVariant[LanguageVariant["JSX"] = 1] = "JSX";
-    })(ts.LanguageVariant || (ts.LanguageVariant = {}));
-    var LanguageVariant = ts.LanguageVariant;
-    /* @internal */
-    (function (DiagnosticStyle) {
-        DiagnosticStyle[DiagnosticStyle["Simple"] = 0] = "Simple";
-        DiagnosticStyle[DiagnosticStyle["Pretty"] = 1] = "Pretty";
-    })(ts.DiagnosticStyle || (ts.DiagnosticStyle = {}));
-    var DiagnosticStyle = ts.DiagnosticStyle;
-    /* @internal */
-    (function (CharacterCodes) {
-        CharacterCodes[CharacterCodes["nullCharacter"] = 0] = "nullCharacter";
-        CharacterCodes[CharacterCodes["maxAsciiCharacter"] = 127] = "maxAsciiCharacter";
-        CharacterCodes[CharacterCodes["lineFeed"] = 10] = "lineFeed";
-        CharacterCodes[CharacterCodes["carriageReturn"] = 13] = "carriageReturn";
-        CharacterCodes[CharacterCodes["lineSeparator"] = 8232] = "lineSeparator";
-        CharacterCodes[CharacterCodes["paragraphSeparator"] = 8233] = "paragraphSeparator";
-        CharacterCodes[CharacterCodes["nextLine"] = 133] = "nextLine";
-        // Unicode 3.0 space characters
-        CharacterCodes[CharacterCodes["space"] = 32] = "space";
-        CharacterCodes[CharacterCodes["nonBreakingSpace"] = 160] = "nonBreakingSpace";
-        CharacterCodes[CharacterCodes["enQuad"] = 8192] = "enQuad";
-        CharacterCodes[CharacterCodes["emQuad"] = 8193] = "emQuad";
-        CharacterCodes[CharacterCodes["enSpace"] = 8194] = "enSpace";
-        CharacterCodes[CharacterCodes["emSpace"] = 8195] = "emSpace";
-        CharacterCodes[CharacterCodes["threePerEmSpace"] = 8196] = "threePerEmSpace";
-        CharacterCodes[CharacterCodes["fourPerEmSpace"] = 8197] = "fourPerEmSpace";
-        CharacterCodes[CharacterCodes["sixPerEmSpace"] = 8198] = "sixPerEmSpace";
-        CharacterCodes[CharacterCodes["figureSpace"] = 8199] = "figureSpace";
-        CharacterCodes[CharacterCodes["punctuationSpace"] = 8200] = "punctuationSpace";
-        CharacterCodes[CharacterCodes["thinSpace"] = 8201] = "thinSpace";
-        CharacterCodes[CharacterCodes["hairSpace"] = 8202] = "hairSpace";
-        CharacterCodes[CharacterCodes["zeroWidthSpace"] = 8203] = "zeroWidthSpace";
-        CharacterCodes[CharacterCodes["narrowNoBreakSpace"] = 8239] = "narrowNoBreakSpace";
-        CharacterCodes[CharacterCodes["ideographicSpace"] = 12288] = "ideographicSpace";
-        CharacterCodes[CharacterCodes["mathematicalSpace"] = 8287] = "mathematicalSpace";
-        CharacterCodes[CharacterCodes["ogham"] = 5760] = "ogham";
-        CharacterCodes[CharacterCodes["_"] = 95] = "_";
-        CharacterCodes[CharacterCodes["$"] = 36] = "$";
-        CharacterCodes[CharacterCodes["_0"] = 48] = "_0";
-        CharacterCodes[CharacterCodes["_1"] = 49] = "_1";
-        CharacterCodes[CharacterCodes["_2"] = 50] = "_2";
-        CharacterCodes[CharacterCodes["_3"] = 51] = "_3";
-        CharacterCodes[CharacterCodes["_4"] = 52] = "_4";
-        CharacterCodes[CharacterCodes["_5"] = 53] = "_5";
-        CharacterCodes[CharacterCodes["_6"] = 54] = "_6";
-        CharacterCodes[CharacterCodes["_7"] = 55] = "_7";
-        CharacterCodes[CharacterCodes["_8"] = 56] = "_8";
-        CharacterCodes[CharacterCodes["_9"] = 57] = "_9";
-        CharacterCodes[CharacterCodes["a"] = 97] = "a";
-        CharacterCodes[CharacterCodes["b"] = 98] = "b";
-        CharacterCodes[CharacterCodes["c"] = 99] = "c";
-        CharacterCodes[CharacterCodes["d"] = 100] = "d";
-        CharacterCodes[CharacterCodes["e"] = 101] = "e";
-        CharacterCodes[CharacterCodes["f"] = 102] = "f";
-        CharacterCodes[CharacterCodes["g"] = 103] = "g";
-        CharacterCodes[CharacterCodes["h"] = 104] = "h";
-        CharacterCodes[CharacterCodes["i"] = 105] = "i";
-        CharacterCodes[CharacterCodes["j"] = 106] = "j";
-        CharacterCodes[CharacterCodes["k"] = 107] = "k";
-        CharacterCodes[CharacterCodes["l"] = 108] = "l";
-        CharacterCodes[CharacterCodes["m"] = 109] = "m";
-        CharacterCodes[CharacterCodes["n"] = 110] = "n";
-        CharacterCodes[CharacterCodes["o"] = 111] = "o";
-        CharacterCodes[CharacterCodes["p"] = 112] = "p";
-        CharacterCodes[CharacterCodes["q"] = 113] = "q";
-        CharacterCodes[CharacterCodes["r"] = 114] = "r";
-        CharacterCodes[CharacterCodes["s"] = 115] = "s";
-        CharacterCodes[CharacterCodes["t"] = 116] = "t";
-        CharacterCodes[CharacterCodes["u"] = 117] = "u";
-        CharacterCodes[CharacterCodes["v"] = 118] = "v";
-        CharacterCodes[CharacterCodes["w"] = 119] = "w";
-        CharacterCodes[CharacterCodes["x"] = 120] = "x";
-        CharacterCodes[CharacterCodes["y"] = 121] = "y";
-        CharacterCodes[CharacterCodes["z"] = 122] = "z";
-        CharacterCodes[CharacterCodes["A"] = 65] = "A";
-        CharacterCodes[CharacterCodes["B"] = 66] = "B";
-        CharacterCodes[CharacterCodes["C"] = 67] = "C";
-        CharacterCodes[CharacterCodes["D"] = 68] = "D";
-        CharacterCodes[CharacterCodes["E"] = 69] = "E";
-        CharacterCodes[CharacterCodes["F"] = 70] = "F";
-        CharacterCodes[CharacterCodes["G"] = 71] = "G";
-        CharacterCodes[CharacterCodes["H"] = 72] = "H";
-        CharacterCodes[CharacterCodes["I"] = 73] = "I";
-        CharacterCodes[CharacterCodes["J"] = 74] = "J";
-        CharacterCodes[CharacterCodes["K"] = 75] = "K";
-        CharacterCodes[CharacterCodes["L"] = 76] = "L";
-        CharacterCodes[CharacterCodes["M"] = 77] = "M";
-        CharacterCodes[CharacterCodes["N"] = 78] = "N";
-        CharacterCodes[CharacterCodes["O"] = 79] = "O";
-        CharacterCodes[CharacterCodes["P"] = 80] = "P";
-        CharacterCodes[CharacterCodes["Q"] = 81] = "Q";
-        CharacterCodes[CharacterCodes["R"] = 82] = "R";
-        CharacterCodes[CharacterCodes["S"] = 83] = "S";
-        CharacterCodes[CharacterCodes["T"] = 84] = "T";
-        CharacterCodes[CharacterCodes["U"] = 85] = "U";
-        CharacterCodes[CharacterCodes["V"] = 86] = "V";
-        CharacterCodes[CharacterCodes["W"] = 87] = "W";
-        CharacterCodes[CharacterCodes["X"] = 88] = "X";
-        CharacterCodes[CharacterCodes["Y"] = 89] = "Y";
-        CharacterCodes[CharacterCodes["Z"] = 90] = "Z";
-        CharacterCodes[CharacterCodes["ampersand"] = 38] = "ampersand";
-        CharacterCodes[CharacterCodes["asterisk"] = 42] = "asterisk";
-        CharacterCodes[CharacterCodes["at"] = 64] = "at";
-        CharacterCodes[CharacterCodes["backslash"] = 92] = "backslash";
-        CharacterCodes[CharacterCodes["backtick"] = 96] = "backtick";
-        CharacterCodes[CharacterCodes["bar"] = 124] = "bar";
-        CharacterCodes[CharacterCodes["caret"] = 94] = "caret";
-        CharacterCodes[CharacterCodes["closeBrace"] = 125] = "closeBrace";
-        CharacterCodes[CharacterCodes["closeBracket"] = 93] = "closeBracket";
-        CharacterCodes[CharacterCodes["closeParen"] = 41] = "closeParen";
-        CharacterCodes[CharacterCodes["colon"] = 58] = "colon";
-        CharacterCodes[CharacterCodes["comma"] = 44] = "comma";
-        CharacterCodes[CharacterCodes["dot"] = 46] = "dot";
-        CharacterCodes[CharacterCodes["doubleQuote"] = 34] = "doubleQuote";
-        CharacterCodes[CharacterCodes["equals"] = 61] = "equals";
-        CharacterCodes[CharacterCodes["exclamation"] = 33] = "exclamation";
-        CharacterCodes[CharacterCodes["greaterThan"] = 62] = "greaterThan";
-        CharacterCodes[CharacterCodes["hash"] = 35] = "hash";
-        CharacterCodes[CharacterCodes["lessThan"] = 60] = "lessThan";
-        CharacterCodes[CharacterCodes["minus"] = 45] = "minus";
-        CharacterCodes[CharacterCodes["openBrace"] = 123] = "openBrace";
-        CharacterCodes[CharacterCodes["openBracket"] = 91] = "openBracket";
-        CharacterCodes[CharacterCodes["openParen"] = 40] = "openParen";
-        CharacterCodes[CharacterCodes["percent"] = 37] = "percent";
-        CharacterCodes[CharacterCodes["plus"] = 43] = "plus";
-        CharacterCodes[CharacterCodes["question"] = 63] = "question";
-        CharacterCodes[CharacterCodes["semicolon"] = 59] = "semicolon";
-        CharacterCodes[CharacterCodes["singleQuote"] = 39] = "singleQuote";
-        CharacterCodes[CharacterCodes["slash"] = 47] = "slash";
-        CharacterCodes[CharacterCodes["tilde"] = 126] = "tilde";
-        CharacterCodes[CharacterCodes["backspace"] = 8] = "backspace";
-        CharacterCodes[CharacterCodes["formFeed"] = 12] = "formFeed";
-        CharacterCodes[CharacterCodes["byteOrderMark"] = 65279] = "byteOrderMark";
-        CharacterCodes[CharacterCodes["tab"] = 9] = "tab";
-        CharacterCodes[CharacterCodes["verticalTab"] = 11] = "verticalTab";
-    })(ts.CharacterCodes || (ts.CharacterCodes = {}));
-    var CharacterCodes = ts.CharacterCodes;
-})(ts || (ts = {}));
-/// <reference path="types.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    /**
-     * Ternary values are defined such that
-     * x & y is False if either x or y is False.
-     * x & y is Maybe if either x or y is Maybe, but neither x or y is False.
-     * x & y is True if both x and y are True.
-     * x | y is False if both x and y are False.
-     * x | y is Maybe if either x or y is Maybe, but neither x or y is True.
-     * x | y is True if either x or y is True.
-     */
-    (function (Ternary) {
-        Ternary[Ternary["False"] = 0] = "False";
-        Ternary[Ternary["Maybe"] = 1] = "Maybe";
-        Ternary[Ternary["True"] = -1] = "True";
-    })(ts.Ternary || (ts.Ternary = {}));
-    var Ternary = ts.Ternary;
-    function createFileMap(keyMapper) {
-        var files = {};
-        return {
-            get: get,
-            set: set,
-            contains: contains,
-            remove: remove,
-            forEachValue: forEachValueInMap,
-            clear: clear
-        };
-        function forEachValueInMap(f) {
-            for (var key in files) {
-                f(key, files[key]);
-            }
-        }
-        // path should already be well-formed so it does not need to be normalized
-        function get(path) {
-            return files[toKey(path)];
-        }
-        function set(path, value) {
-            files[toKey(path)] = value;
-        }
-        function contains(path) {
-            return hasProperty(files, toKey(path));
-        }
-        function remove(path) {
-            var key = toKey(path);
-            delete files[key];
-        }
-        function clear() {
-            files = {};
-        }
-        function toKey(path) {
-            return keyMapper ? keyMapper(path) : path;
-        }
-    }
-    ts.createFileMap = createFileMap;
-    function toPath(fileName, basePath, getCanonicalFileName) {
-        var nonCanonicalizedPath = isRootedDiskPath(fileName)
-            ? normalizePath(fileName)
-            : getNormalizedAbsolutePath(fileName, basePath);
-        return getCanonicalFileName(nonCanonicalizedPath);
-    }
-    ts.toPath = toPath;
-    (function (Comparison) {
-        Comparison[Comparison["LessThan"] = -1] = "LessThan";
-        Comparison[Comparison["EqualTo"] = 0] = "EqualTo";
-        Comparison[Comparison["GreaterThan"] = 1] = "GreaterThan";
-    })(ts.Comparison || (ts.Comparison = {}));
-    var Comparison = ts.Comparison;
-    /**
-     * Iterates through 'array' by index and performs the callback on each element of array until the callback
-     * returns a truthy value, then returns that value.
-     * If no such value is found, the callback is applied to each element of array and undefined is returned.
-     */
-    function forEach(array, callback) {
-        if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
-                var result = callback(array[i], i);
-                if (result) {
-                    return result;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.forEach = forEach;
-    function contains(array, value, areEqual) {
-        if (array) {
-            for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
-                var v = array_1[_i];
-                if (areEqual ? areEqual(v, value) : v === value) {
-                    return true;
-                }
-            }
-        }
-        return false;
-    }
-    ts.contains = contains;
-    function indexOf(array, value) {
-        if (array) {
-            for (var i = 0, len = array.length; i < len; i++) {
-                if (array[i] === value) {
-                    return i;
-                }
-            }
-        }
-        return -1;
-    }
-    ts.indexOf = indexOf;
-    function countWhere(array, predicate) {
-        var count = 0;
-        if (array) {
-            for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
-                var v = array_2[_i];
-                if (predicate(v)) {
-                    count++;
-                }
-            }
-        }
-        return count;
-    }
-    ts.countWhere = countWhere;
-    function filter(array, f) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_3 = array; _i < array_3.length; _i++) {
-                var item = array_3[_i];
-                if (f(item)) {
-                    result.push(item);
-                }
-            }
-        }
-        return result;
-    }
-    ts.filter = filter;
-    function map(array, f) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_4 = array; _i < array_4.length; _i++) {
-                var v = array_4[_i];
-                result.push(f(v));
-            }
-        }
-        return result;
-    }
-    ts.map = map;
-    function concatenate(array1, array2) {
-        if (!array2 || !array2.length)
-            return array1;
-        if (!array1 || !array1.length)
-            return array2;
-        return array1.concat(array2);
-    }
-    ts.concatenate = concatenate;
-    function deduplicate(array, areEqual) {
-        var result;
-        if (array) {
-            result = [];
-            for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
-                var item = array_5[_i];
-                if (!contains(result, item, areEqual)) {
-                    result.push(item);
-                }
-            }
-        }
-        return result;
-    }
-    ts.deduplicate = deduplicate;
-    function sum(array, prop) {
-        var result = 0;
-        for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
-            var v = array_6[_i];
-            result += v[prop];
-        }
-        return result;
-    }
-    ts.sum = sum;
-    function addRange(to, from) {
-        if (to && from) {
-            for (var _i = 0, from_1 = from; _i < from_1.length; _i++) {
-                var v = from_1[_i];
-                to.push(v);
-            }
-        }
-    }
-    ts.addRange = addRange;
-    function rangeEquals(array1, array2, pos, end) {
-        while (pos < end) {
-            if (array1[pos] !== array2[pos]) {
-                return false;
-            }
-            pos++;
-        }
-        return true;
-    }
-    ts.rangeEquals = rangeEquals;
-    /**
-     * Returns the last element of an array if non-empty, undefined otherwise.
-     */
-    function lastOrUndefined(array) {
-        if (array.length === 0) {
-            return undefined;
-        }
-        return array[array.length - 1];
-    }
-    ts.lastOrUndefined = lastOrUndefined;
-    /**
-     * Performs a binary search, finding the index at which 'value' occurs in 'array'.
-     * If no such index is found, returns the 2's-complement of first index at which
-     * number[index] exceeds number.
-     * @param array A sorted array whose first element must be no larger than number
-     * @param number The value to be searched for in the array.
-     */
-    function binarySearch(array, value) {
-        var low = 0;
-        var high = array.length - 1;
-        while (low <= high) {
-            var middle = low + ((high - low) >> 1);
-            var midValue = array[middle];
-            if (midValue === value) {
-                return middle;
-            }
-            else if (midValue > value) {
-                high = middle - 1;
-            }
-            else {
-                low = middle + 1;
-            }
-        }
-        return ~low;
-    }
-    ts.binarySearch = binarySearch;
-    function reduceLeft(array, f, initial) {
-        if (array) {
-            var count = array.length;
-            if (count > 0) {
-                var pos = 0;
-                var result = void 0;
-                if (arguments.length <= 2) {
-                    result = array[pos];
-                    pos++;
-                }
-                else {
-                    result = initial;
-                }
-                while (pos < count) {
-                    result = f(result, array[pos]);
-                    pos++;
-                }
-                return result;
-            }
-        }
-        return initial;
-    }
-    ts.reduceLeft = reduceLeft;
-    function reduceRight(array, f, initial) {
-        if (array) {
-            var pos = array.length - 1;
-            if (pos >= 0) {
-                var result = void 0;
-                if (arguments.length <= 2) {
-                    result = array[pos];
-                    pos--;
-                }
-                else {
-                    result = initial;
-                }
-                while (pos >= 0) {
-                    result = f(result, array[pos]);
-                    pos--;
-                }
-                return result;
-            }
-        }
-        return initial;
-    }
-    ts.reduceRight = reduceRight;
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-    function hasProperty(map, key) {
-        return hasOwnProperty.call(map, key);
-    }
-    ts.hasProperty = hasProperty;
-    function getKeys(map) {
-        var keys = [];
-        for (var key in map) {
-            keys.push(key);
-        }
-        return keys;
-    }
-    ts.getKeys = getKeys;
-    function getProperty(map, key) {
-        return hasOwnProperty.call(map, key) ? map[key] : undefined;
-    }
-    ts.getProperty = getProperty;
-    function isEmpty(map) {
-        for (var id in map) {
-            if (hasProperty(map, id)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.isEmpty = isEmpty;
-    function clone(object) {
-        var result = {};
-        for (var id in object) {
-            result[id] = object[id];
-        }
-        return result;
-    }
-    ts.clone = clone;
-    function extend(first, second) {
-        var result = {};
-        for (var id in first) {
-            result[id] = first[id];
-        }
-        for (var id in second) {
-            if (!hasProperty(result, id)) {
-                result[id] = second[id];
-            }
-        }
-        return result;
-    }
-    ts.extend = extend;
-    function forEachValue(map, callback) {
-        var result;
-        for (var id in map) {
-            if (result = callback(map[id]))
-                break;
-        }
-        return result;
-    }
-    ts.forEachValue = forEachValue;
-    function forEachKey(map, callback) {
-        var result;
-        for (var id in map) {
-            if (result = callback(id))
-                break;
-        }
-        return result;
-    }
-    ts.forEachKey = forEachKey;
-    function lookUp(map, key) {
-        return hasProperty(map, key) ? map[key] : undefined;
-    }
-    ts.lookUp = lookUp;
-    function copyMap(source, target) {
-        for (var p in source) {
-            target[p] = source[p];
-        }
-    }
-    ts.copyMap = copyMap;
-    /**
-     * Creates a map from the elements of an array.
-     *
-     * @param array the array of input elements.
-     * @param makeKey a function that produces a key for a given element.
-     *
-     * This function makes no effort to avoid collisions; if any two elements produce
-     * the same key with the given 'makeKey' function, then the element with the higher
-     * index in the array will be the one associated with the produced key.
-     */
-    function arrayToMap(array, makeKey) {
-        var result = {};
-        forEach(array, function (value) {
-            result[makeKey(value)] = value;
-        });
-        return result;
-    }
-    ts.arrayToMap = arrayToMap;
-    /**
-     * Reduce the properties of a map.
-     *
-     * @param map The map to reduce
-     * @param callback An aggregation function that is called for each entry in the map
-     * @param initial The initial value for the reduction.
-     */
-    function reduceProperties(map, callback, initial) {
-        var result = initial;
-        if (map) {
-            for (var key in map) {
-                if (hasProperty(map, key)) {
-                    result = callback(result, map[key], String(key));
-                }
-            }
-        }
-        return result;
-    }
-    ts.reduceProperties = reduceProperties;
-    /**
-     * Tests whether a value is an array.
-     */
-    function isArray(value) {
-        return Array.isArray ? Array.isArray(value) : value instanceof Array;
-    }
-    ts.isArray = isArray;
-    function memoize(callback) {
-        var value;
-        return function () {
-            if (callback) {
-                value = callback();
-                callback = undefined;
-            }
-            return value;
-        };
-    }
-    ts.memoize = memoize;
-    function formatStringFromArgs(text, args, baseIndex) {
-        baseIndex = baseIndex || 0;
-        return text.replace(/{(\d+)}/g, function (match, index) { return args[+index + baseIndex]; });
-    }
-    ts.localizedDiagnosticMessages = undefined;
-    function getLocaleSpecificMessage(message) {
-        return ts.localizedDiagnosticMessages && ts.localizedDiagnosticMessages[message.key]
-            ? ts.localizedDiagnosticMessages[message.key]
-            : message.message;
-    }
-    ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
-    function createFileDiagnostic(file, start, length, message) {
-        var end = start + length;
-        Debug.assert(start >= 0, "start must be non-negative, is " + start);
-        Debug.assert(length >= 0, "length must be non-negative, is " + length);
-        if (file) {
-            Debug.assert(start <= file.text.length, "start must be within the bounds of the file. " + start + " > " + file.text.length);
-            Debug.assert(end <= file.text.length, "end must be the bounds of the file. " + end + " > " + file.text.length);
-        }
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 4) {
-            text = formatStringFromArgs(text, arguments, 4);
-        }
-        return {
-            file: file,
-            start: start,
-            length: length,
-            messageText: text,
-            category: message.category,
-            code: message.code
-        };
-    }
-    ts.createFileDiagnostic = createFileDiagnostic;
-    /* internal */
-    function formatMessage(dummy, message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 2) {
-            text = formatStringFromArgs(text, arguments, 2);
-        }
-        return text;
-    }
-    ts.formatMessage = formatMessage;
-    function createCompilerDiagnostic(message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 1) {
-            text = formatStringFromArgs(text, arguments, 1);
-        }
-        return {
-            file: undefined,
-            start: undefined,
-            length: undefined,
-            messageText: text,
-            category: message.category,
-            code: message.code
-        };
-    }
-    ts.createCompilerDiagnostic = createCompilerDiagnostic;
-    function chainDiagnosticMessages(details, message) {
-        var text = getLocaleSpecificMessage(message);
-        if (arguments.length > 2) {
-            text = formatStringFromArgs(text, arguments, 2);
-        }
-        return {
-            messageText: text,
-            category: message.category,
-            code: message.code,
-            next: details
-        };
-    }
-    ts.chainDiagnosticMessages = chainDiagnosticMessages;
-    function concatenateDiagnosticMessageChains(headChain, tailChain) {
-        var lastChain = headChain;
-        while (lastChain.next) {
-            lastChain = lastChain.next;
-        }
-        lastChain.next = tailChain;
-        return headChain;
-    }
-    ts.concatenateDiagnosticMessageChains = concatenateDiagnosticMessageChains;
-    function compareValues(a, b) {
-        if (a === b)
-            return 0 /* EqualTo */;
-        if (a === undefined)
-            return -1 /* LessThan */;
-        if (b === undefined)
-            return 1 /* GreaterThan */;
-        return a < b ? -1 /* LessThan */ : 1 /* GreaterThan */;
-    }
-    ts.compareValues = compareValues;
-    function getDiagnosticFileName(diagnostic) {
-        return diagnostic.file ? diagnostic.file.fileName : undefined;
-    }
-    function compareDiagnostics(d1, d2) {
-        return compareValues(getDiagnosticFileName(d1), getDiagnosticFileName(d2)) ||
-            compareValues(d1.start, d2.start) ||
-            compareValues(d1.length, d2.length) ||
-            compareValues(d1.code, d2.code) ||
-            compareMessageText(d1.messageText, d2.messageText) ||
-            0 /* EqualTo */;
-    }
-    ts.compareDiagnostics = compareDiagnostics;
-    function compareMessageText(text1, text2) {
-        while (text1 && text2) {
-            // We still have both chains.
-            var string1 = typeof text1 === "string" ? text1 : text1.messageText;
-            var string2 = typeof text2 === "string" ? text2 : text2.messageText;
-            var res = compareValues(string1, string2);
-            if (res) {
-                return res;
-            }
-            text1 = typeof text1 === "string" ? undefined : text1.next;
-            text2 = typeof text2 === "string" ? undefined : text2.next;
-        }
-        if (!text1 && !text2) {
-            // if the chains are done, then these messages are the same.
-            return 0 /* EqualTo */;
-        }
-        // We still have one chain remaining.  The shorter chain should come first.
-        return text1 ? 1 /* GreaterThan */ : -1 /* LessThan */;
-    }
-    function sortAndDeduplicateDiagnostics(diagnostics) {
-        return deduplicateSortedDiagnostics(diagnostics.sort(compareDiagnostics));
-    }
-    ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
-    function deduplicateSortedDiagnostics(diagnostics) {
-        if (diagnostics.length < 2) {
-            return diagnostics;
-        }
-        var newDiagnostics = [diagnostics[0]];
-        var previousDiagnostic = diagnostics[0];
-        for (var i = 1; i < diagnostics.length; i++) {
-            var currentDiagnostic = diagnostics[i];
-            var isDupe = compareDiagnostics(currentDiagnostic, previousDiagnostic) === 0 /* EqualTo */;
-            if (!isDupe) {
-                newDiagnostics.push(currentDiagnostic);
-                previousDiagnostic = currentDiagnostic;
-            }
-        }
-        return newDiagnostics;
-    }
-    ts.deduplicateSortedDiagnostics = deduplicateSortedDiagnostics;
-    function normalizeSlashes(path) {
-        return path.replace(/\\/g, "/");
-    }
-    ts.normalizeSlashes = normalizeSlashes;
-    // Returns length of path root (i.e. length of "/", "x:/", "//server/share/, file:///user/files")
-    function getRootLength(path) {
-        if (path.charCodeAt(0) === 47 /* slash */) {
-            if (path.charCodeAt(1) !== 47 /* slash */)
-                return 1;
-            var p1 = path.indexOf("/", 2);
-            if (p1 < 0)
-                return 2;
-            var p2 = path.indexOf("/", p1 + 1);
-            if (p2 < 0)
-                return p1 + 1;
-            return p2 + 1;
-        }
-        if (path.charCodeAt(1) === 58 /* colon */) {
-            if (path.charCodeAt(2) === 47 /* slash */)
-                return 3;
-            return 2;
-        }
-        // Per RFC 1738 'file' URI schema has the shape file://<host>/<path>
-        // if <host> is omitted then it is assumed that host value is 'localhost',
-        // however slash after the omitted <host> is not removed.
-        // file:///folder1/file1 - this is a correct URI
-        // file://folder2/file2 - this is an incorrect URI
-        if (path.lastIndexOf("file:///", 0) === 0) {
-            return "file:///".length;
-        }
-        var idx = path.indexOf("://");
-        if (idx !== -1) {
-            return idx + "://".length;
-        }
-        return 0;
-    }
-    ts.getRootLength = getRootLength;
-    ts.directorySeparator = "/";
-    function getNormalizedParts(normalizedSlashedPath, rootLength) {
-        var parts = normalizedSlashedPath.substr(rootLength).split(ts.directorySeparator);
-        var normalized = [];
-        for (var _i = 0, parts_1 = parts; _i < parts_1.length; _i++) {
-            var part = parts_1[_i];
-            if (part !== ".") {
-                if (part === ".." && normalized.length > 0 && lastOrUndefined(normalized) !== "..") {
-                    normalized.pop();
-                }
-                else {
-                    // A part may be an empty string (which is 'falsy') if the path had consecutive slashes,
-                    // e.g. "path//file.ts".  Drop these before re-joining the parts.
-                    if (part) {
-                        normalized.push(part);
-                    }
-                }
-            }
-        }
-        return normalized;
-    }
-    function normalizePath(path) {
-        path = normalizeSlashes(path);
-        var rootLength = getRootLength(path);
-        var normalized = getNormalizedParts(path, rootLength);
-        return path.substr(0, rootLength) + normalized.join(ts.directorySeparator);
-    }
-    ts.normalizePath = normalizePath;
-    function getDirectoryPath(path) {
-        return path.substr(0, Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator)));
-    }
-    ts.getDirectoryPath = getDirectoryPath;
-    function isUrl(path) {
-        return path && !isRootedDiskPath(path) && path.indexOf("://") !== -1;
-    }
-    ts.isUrl = isUrl;
-    function isRootedDiskPath(path) {
-        return getRootLength(path) !== 0;
-    }
-    ts.isRootedDiskPath = isRootedDiskPath;
-    function normalizedPathComponents(path, rootLength) {
-        var normalizedParts = getNormalizedParts(path, rootLength);
-        return [path.substr(0, rootLength)].concat(normalizedParts);
-    }
-    function getNormalizedPathComponents(path, currentDirectory) {
-        path = normalizeSlashes(path);
-        var rootLength = getRootLength(path);
-        if (rootLength === 0) {
-            // If the path is not rooted it is relative to current directory
-            path = combinePaths(normalizeSlashes(currentDirectory), path);
-            rootLength = getRootLength(path);
-        }
-        return normalizedPathComponents(path, rootLength);
-    }
-    ts.getNormalizedPathComponents = getNormalizedPathComponents;
-    function getNormalizedAbsolutePath(fileName, currentDirectory) {
-        return getNormalizedPathFromPathComponents(getNormalizedPathComponents(fileName, currentDirectory));
-    }
-    ts.getNormalizedAbsolutePath = getNormalizedAbsolutePath;
-    function getNormalizedPathFromPathComponents(pathComponents) {
-        if (pathComponents && pathComponents.length) {
-            return pathComponents[0] + pathComponents.slice(1).join(ts.directorySeparator);
-        }
-    }
-    ts.getNormalizedPathFromPathComponents = getNormalizedPathFromPathComponents;
-    function getNormalizedPathComponentsOfUrl(url) {
-        // Get root length of http://www.website.com/folder1/folder2/
-        // In this example the root is:  http://www.website.com/
-        // normalized path components should be ["http://www.website.com/", "folder1", "folder2"]
-        var urlLength = url.length;
-        // Initial root length is http:// part
-        var rootLength = url.indexOf("://") + "://".length;
-        while (rootLength < urlLength) {
-            // Consume all immediate slashes in the protocol
-            // eg.initial rootlength is just file:// but it needs to consume another "/" in file:///
-            if (url.charCodeAt(rootLength) === 47 /* slash */) {
-                rootLength++;
-            }
-            else {
-                // non slash character means we continue proceeding to next component of root search
-                break;
-            }
-        }
-        // there are no parts after http:// just return current string as the pathComponent
-        if (rootLength === urlLength) {
-            return [url];
-        }
-        // Find the index of "/" after website.com so the root can be http://www.website.com/ (from existing http://)
-        var indexOfNextSlash = url.indexOf(ts.directorySeparator, rootLength);
-        if (indexOfNextSlash !== -1) {
-            // Found the "/" after the website.com so the root is length of http://www.website.com/
-            // and get components after the root normally like any other folder components
-            rootLength = indexOfNextSlash + 1;
-            return normalizedPathComponents(url, rootLength);
-        }
-        else {
-            // Can't find the host assume the rest of the string as component
-            // but make sure we append "/"  to it as root is not joined using "/"
-            // eg. if url passed in was http://website.com we want to use root as [http://website.com/]
-            // so that other path manipulations will be correct and it can be merged with relative paths correctly
-            return [url + ts.directorySeparator];
-        }
-    }
-    function getNormalizedPathOrUrlComponents(pathOrUrl, currentDirectory) {
-        if (isUrl(pathOrUrl)) {
-            return getNormalizedPathComponentsOfUrl(pathOrUrl);
-        }
-        else {
-            return getNormalizedPathComponents(pathOrUrl, currentDirectory);
-        }
-    }
-    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
-        var pathComponents = getNormalizedPathOrUrlComponents(relativeOrAbsolutePath, currentDirectory);
-        var directoryComponents = getNormalizedPathOrUrlComponents(directoryPathOrUrl, currentDirectory);
-        if (directoryComponents.length > 1 && lastOrUndefined(directoryComponents) === "") {
-            // If the directory path given was of type test/cases/ then we really need components of directory to be only till its name
-            // that is  ["test", "cases", ""] needs to be actually ["test", "cases"]
-            directoryComponents.length--;
-        }
-        // Find the component that differs
-        var joinStartIndex;
-        for (joinStartIndex = 0; joinStartIndex < pathComponents.length && joinStartIndex < directoryComponents.length; joinStartIndex++) {
-            if (getCanonicalFileName(directoryComponents[joinStartIndex]) !== getCanonicalFileName(pathComponents[joinStartIndex])) {
-                break;
-            }
-        }
-        // Get the relative path
-        if (joinStartIndex) {
-            var relativePath = "";
-            var relativePathComponents = pathComponents.slice(joinStartIndex, pathComponents.length);
-            for (; joinStartIndex < directoryComponents.length; joinStartIndex++) {
-                if (directoryComponents[joinStartIndex] !== "") {
-                    relativePath = relativePath + ".." + ts.directorySeparator;
-                }
-            }
-            return relativePath + relativePathComponents.join(ts.directorySeparator);
-        }
-        // Cant find the relative path, get the absolute path
-        var absolutePath = getNormalizedPathFromPathComponents(pathComponents);
-        if (isAbsolutePathAnUrl && isRootedDiskPath(absolutePath)) {
-            absolutePath = "file:///" + absolutePath;
-        }
-        return absolutePath;
-    }
-    ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
-    function getBaseFileName(path) {
-        if (path === undefined) {
-            return undefined;
-        }
-        var i = path.lastIndexOf(ts.directorySeparator);
-        return i < 0 ? path : path.substring(i + 1);
-    }
-    ts.getBaseFileName = getBaseFileName;
-    function combinePaths(path1, path2) {
-        if (!(path1 && path1.length))
-            return path2;
-        if (!(path2 && path2.length))
-            return path1;
-        if (getRootLength(path2) !== 0)
-            return path2;
-        if (path1.charAt(path1.length - 1) === ts.directorySeparator)
-            return path1 + path2;
-        return path1 + ts.directorySeparator + path2;
-    }
-    ts.combinePaths = combinePaths;
-    function fileExtensionIs(path, extension) {
-        var pathLen = path.length;
-        var extLen = extension.length;
-        return pathLen > extLen && path.substr(pathLen - extLen, extLen) === extension;
-    }
-    ts.fileExtensionIs = fileExtensionIs;
-    function ensureScriptKind(fileName, scriptKind) {
-        // Using scriptKind as a condition handles both:
-        // - 'scriptKind' is unspecified and thus it is `undefined`
-        // - 'scriptKind' is set and it is `Unknown` (0)
-        // If the 'scriptKind' is 'undefined' or 'Unknown' then we attempt
-        // to get the ScriptKind from the file name. If it cannot be resolved
-        // from the file name then the default 'TS' script kind is returned.
-        return (scriptKind || getScriptKindFromFileName(fileName)) || 3 /* TS */;
-    }
-    ts.ensureScriptKind = ensureScriptKind;
-    function getScriptKindFromFileName(fileName) {
-        var ext = fileName.substr(fileName.lastIndexOf("."));
-        switch (ext.toLowerCase()) {
-            case ".js":
-                return 1 /* JS */;
-            case ".jsx":
-                return 2 /* JSX */;
-            case ".ts":
-                return 3 /* TS */;
-            case ".tsx":
-                return 4 /* TSX */;
-            default:
-                return 0 /* Unknown */;
-        }
-    }
-    ts.getScriptKindFromFileName = getScriptKindFromFileName;
-    /**
-     *  List of supported extensions in order of file resolution precedence.
-     */
-    ts.supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
-    ts.supportedJavascriptExtensions = [".js", ".jsx"];
-    var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
-    function getSupportedExtensions(options) {
-        return options && options.allowJs ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
-    }
-    ts.getSupportedExtensions = getSupportedExtensions;
-    function isSupportedSourceFileName(fileName, compilerOptions) {
-        if (!fileName) {
-            return false;
-        }
-        for (var _i = 0, _a = getSupportedExtensions(compilerOptions); _i < _a.length; _i++) {
-            var extension = _a[_i];
-            if (fileExtensionIs(fileName, extension)) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.isSupportedSourceFileName = isSupportedSourceFileName;
-    var extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
-    function removeFileExtension(path) {
-        for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
-            var ext = extensionsToRemove_1[_i];
-            if (fileExtensionIs(path, ext)) {
-                return path.substr(0, path.length - ext.length);
-            }
-        }
-        return path;
-    }
-    ts.removeFileExtension = removeFileExtension;
-    function Symbol(flags, name) {
-        this.flags = flags;
-        this.name = name;
-        this.declarations = undefined;
-    }
-    function Type(checker, flags) {
-        this.flags = flags;
-    }
-    function Signature(checker) {
-    }
-    function Node(kind, pos, end) {
-        this.kind = kind;
-        this.pos = pos;
-        this.end = end;
-        this.flags = 0 /* None */;
-        this.parent = undefined;
-    }
-    ts.objectAllocator = {
-        getNodeConstructor: function () { return Node; },
-        getSourceFileConstructor: function () { return Node; },
-        getSymbolConstructor: function () { return Symbol; },
-        getTypeConstructor: function () { return Type; },
-        getSignatureConstructor: function () { return Signature; }
-    };
-    (function (AssertionLevel) {
-        AssertionLevel[AssertionLevel["None"] = 0] = "None";
-        AssertionLevel[AssertionLevel["Normal"] = 1] = "Normal";
-        AssertionLevel[AssertionLevel["Aggressive"] = 2] = "Aggressive";
-        AssertionLevel[AssertionLevel["VeryAggressive"] = 3] = "VeryAggressive";
-    })(ts.AssertionLevel || (ts.AssertionLevel = {}));
-    var AssertionLevel = ts.AssertionLevel;
-    var Debug;
-    (function (Debug) {
-        var currentAssertionLevel = 0 /* None */;
-        function shouldAssert(level) {
-            return currentAssertionLevel >= level;
-        }
-        Debug.shouldAssert = shouldAssert;
-        function assert(expression, message, verboseDebugInfo) {
-            if (!expression) {
-                var verboseDebugString = "";
-                if (verboseDebugInfo) {
-                    verboseDebugString = "\r\nVerbose Debug Information: " + verboseDebugInfo();
-                }
-                debugger;
-                throw new Error("Debug Failure. False expression: " + (message || "") + verboseDebugString);
-            }
-        }
-        Debug.assert = assert;
-        function fail(message) {
-            Debug.assert(/*expression*/ false, message);
-        }
-        Debug.fail = fail;
-    })(Debug = ts.Debug || (ts.Debug = {}));
-    function copyListRemovingItem(item, list) {
-        var copiedList = [];
-        for (var _i = 0, list_1 = list; _i < list_1.length; _i++) {
-            var e = list_1[_i];
-            if (e !== item) {
-                copiedList.push(e);
-            }
-        }
-        return copiedList;
-    }
-    ts.copyListRemovingItem = copyListRemovingItem;
-    function createGetCanonicalFileName(useCaseSensitivefileNames) {
-        return useCaseSensitivefileNames
-            ? (function (fileName) { return fileName; })
-            : (function (fileName) { return fileName.toLowerCase(); });
-    }
-    ts.createGetCanonicalFileName = createGetCanonicalFileName;
-})(ts || (ts = {}));
-/// <reference path="core.ts"/>
-var ts;
-(function (ts) {
-    ts.sys = (function () {
-        function getWScriptSystem() {
-            var fso = new ActiveXObject("Scripting.FileSystemObject");
-            var fileStream = new ActiveXObject("ADODB.Stream");
-            fileStream.Type = 2 /*text*/;
-            var binaryStream = new ActiveXObject("ADODB.Stream");
-            binaryStream.Type = 1 /*binary*/;
-            var args = [];
-            for (var i = 0; i < WScript.Arguments.length; i++) {
-                args[i] = WScript.Arguments.Item(i);
-            }
-            function readFile(fileName, encoding) {
-                if (!fso.FileExists(fileName)) {
-                    return undefined;
-                }
-                fileStream.Open();
-                try {
-                    if (encoding) {
-                        fileStream.Charset = encoding;
-                        fileStream.LoadFromFile(fileName);
-                    }
-                    else {
-                        // Load file and read the first two bytes into a string with no interpretation
-                        fileStream.Charset = "x-ansi";
-                        fileStream.LoadFromFile(fileName);
-                        var bom = fileStream.ReadText(2) || "";
-                        // Position must be at 0 before encoding can be changed
-                        fileStream.Position = 0;
-                        // [0xFF,0xFE] and [0xFE,0xFF] mean utf-16 (little or big endian), otherwise default to utf-8
-                        fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
-                    }
-                    // ReadText method always strips byte order mark from resulting string
-                    return fileStream.ReadText();
-                }
-                catch (e) {
-                    throw e;
-                }
-                finally {
-                    fileStream.Close();
-                }
-            }
-            function writeFile(fileName, data, writeByteOrderMark) {
-                fileStream.Open();
-                binaryStream.Open();
-                try {
-                    // Write characters in UTF-8 encoding
-                    fileStream.Charset = "utf-8";
-                    fileStream.WriteText(data);
-                    // If we don't want the BOM, then skip it by setting the starting location to 3 (size of BOM).
-                    // If not, start from position 0, as the BOM will be added automatically when charset==utf8.
-                    if (writeByteOrderMark) {
-                        fileStream.Position = 0;
-                    }
-                    else {
-                        fileStream.Position = 3;
-                    }
-                    fileStream.CopyTo(binaryStream);
-                    binaryStream.SaveToFile(fileName, 2 /*overwrite*/);
-                }
-                finally {
-                    binaryStream.Close();
-                    fileStream.Close();
-                }
-            }
-            function getCanonicalPath(path) {
-                return path.toLowerCase();
-            }
-            function getNames(collection) {
-                var result = [];
-                for (var e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
-                    result.push(e.item().Name);
-                }
-                return result.sort();
-            }
-            function getDirectories(path) {
-                var folder = fso.GetFolder(path);
-                return getNames(folder.subfolders);
-            }
-            function readDirectory(path, extension, exclude) {
-                var result = [];
-                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
-                visitDirectory(path);
-                return result;
-                function visitDirectory(path) {
-                    var folder = fso.GetFolder(path || ".");
-                    var files = getNames(folder.files);
-                    for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
-                        var current = files_1[_i];
-                        var name_1 = ts.combinePaths(path, current);
-                        if ((!extension || ts.fileExtensionIs(name_1, extension)) && !ts.contains(exclude, getCanonicalPath(name_1))) {
-                            result.push(name_1);
-                        }
-                    }
-                    var subfolders = getNames(folder.subfolders);
-                    for (var _a = 0, subfolders_1 = subfolders; _a < subfolders_1.length; _a++) {
-                        var current = subfolders_1[_a];
-                        var name_2 = ts.combinePaths(path, current);
-                        if (!ts.contains(exclude, getCanonicalPath(name_2))) {
-                            visitDirectory(name_2);
-                        }
-                    }
-                }
-            }
-            return {
-                args: args,
-                newLine: "\r\n",
-                useCaseSensitiveFileNames: false,
-                write: function (s) {
-                    WScript.StdOut.Write(s);
-                },
-                readFile: readFile,
-                writeFile: writeFile,
-                resolvePath: function (path) {
-                    return fso.GetAbsolutePathName(path);
-                },
-                fileExists: function (path) {
-                    return fso.FileExists(path);
-                },
-                directoryExists: function (path) {
-                    return fso.FolderExists(path);
-                },
-                createDirectory: function (directoryName) {
-                    if (!this.directoryExists(directoryName)) {
-                        fso.CreateFolder(directoryName);
-                    }
-                },
-                getExecutingFilePath: function () {
-                    return WScript.ScriptFullName;
-                },
-                getCurrentDirectory: function () {
-                    return new ActiveXObject("WScript.Shell").CurrentDirectory;
-                },
-                getDirectories: getDirectories,
-                readDirectory: readDirectory,
-                exit: function (exitCode) {
-                    try {
-                        WScript.Quit(exitCode);
-                    }
-                    catch (e) {
-                    }
-                }
-            };
-        }
-        function getNodeSystem() {
-            var _fs = require("fs");
-            var _path = require("path");
-            var _os = require("os");
-            var _crypto = require("crypto");
-            var useNonPollingWatchers = process.env["TSC_NONPOLLING_WATCHER"];
-            function createWatchedFileSet() {
-                var dirWatchers = {};
-                // One file can have multiple watchers
-                var fileWatcherCallbacks = {};
-                return { addFile: addFile, removeFile: removeFile };
-                function reduceDirWatcherRefCountForFile(fileName) {
-                    var dirName = ts.getDirectoryPath(fileName);
-                    if (ts.hasProperty(dirWatchers, dirName)) {
-                        var watcher = dirWatchers[dirName];
-                        watcher.referenceCount -= 1;
-                        if (watcher.referenceCount <= 0) {
-                            watcher.close();
-                            delete dirWatchers[dirName];
-                        }
-                    }
-                }
-                function addDirWatcher(dirPath) {
-                    if (ts.hasProperty(dirWatchers, dirPath)) {
-                        var watcher_1 = dirWatchers[dirPath];
-                        watcher_1.referenceCount += 1;
-                        return;
-                    }
-                    var watcher = _fs.watch(dirPath, { persistent: true }, function (eventName, relativeFileName) { return fileEventHandler(eventName, relativeFileName, dirPath); });
-                    watcher.referenceCount = 1;
-                    dirWatchers[dirPath] = watcher;
-                    return;
-                }
-                function addFileWatcherCallback(filePath, callback) {
-                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
-                        fileWatcherCallbacks[filePath].push(callback);
-                    }
-                    else {
-                        fileWatcherCallbacks[filePath] = [callback];
-                    }
-                }
-                function addFile(fileName, callback) {
-                    addFileWatcherCallback(fileName, callback);
-                    addDirWatcher(ts.getDirectoryPath(fileName));
-                    return { fileName: fileName, callback: callback };
-                }
-                function removeFile(watchedFile) {
-                    removeFileWatcherCallback(watchedFile.fileName, watchedFile.callback);
-                    reduceDirWatcherRefCountForFile(watchedFile.fileName);
-                }
-                function removeFileWatcherCallback(filePath, callback) {
-                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
-                        var newCallbacks = ts.copyListRemovingItem(callback, fileWatcherCallbacks[filePath]);
-                        if (newCallbacks.length === 0) {
-                            delete fileWatcherCallbacks[filePath];
-                        }
-                        else {
-                            fileWatcherCallbacks[filePath] = newCallbacks;
-                        }
-                    }
-                }
-                function fileEventHandler(eventName, relativeFileName, baseDirPath) {
-                    // When files are deleted from disk, the triggered "rename" event would have a relativefileName of "undefined"
-                    var fileName = typeof relativeFileName !== "string"
-                        ? undefined
-                        : ts.getNormalizedAbsolutePath(relativeFileName, baseDirPath);
-                    // Some applications save a working file via rename operations
-                    if ((eventName === "change" || eventName === "rename") && ts.hasProperty(fileWatcherCallbacks, fileName)) {
-                        for (var _i = 0, _a = fileWatcherCallbacks[fileName]; _i < _a.length; _i++) {
-                            var fileCallback = _a[_i];
-                            fileCallback(fileName);
-                        }
-                    }
-                }
-            }
-            var watchedFileSet = createWatchedFileSet();
-            function isNode4OrLater() {
-                return parseInt(process.version.charAt(1)) >= 4;
-            }
-            var platform = _os.platform();
-            // win32\win64 are case insensitive platforms, MacOS (darwin) by default is also case insensitive
-            var useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
-            function readFile(fileName, encoding) {
-                if (!fileExists(fileName)) {
-                    return undefined;
-                }
-                var buffer = _fs.readFileSync(fileName);
-                var len = buffer.length;
-                if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
-                    // Big endian UTF-16 byte order mark detected. Since big endian is not supported by node.js,
-                    // flip all byte pairs and treat as little endian.
-                    len &= ~1;
-                    for (var i = 0; i < len; i += 2) {
-                        var temp = buffer[i];
-                        buffer[i] = buffer[i + 1];
-                        buffer[i + 1] = temp;
-                    }
-                    return buffer.toString("utf16le", 2);
-                }
-                if (len >= 2 && buffer[0] === 0xFF && buffer[1] === 0xFE) {
-                    // Little endian UTF-16 byte order mark detected
-                    return buffer.toString("utf16le", 2);
-                }
-                if (len >= 3 && buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
-                    // UTF-8 byte order mark detected
-                    return buffer.toString("utf8", 3);
-                }
-                // Default is UTF-8 with no byte order mark
-                return buffer.toString("utf8");
-            }
-            function writeFile(fileName, data, writeByteOrderMark) {
-                // If a BOM is required, emit one
-                if (writeByteOrderMark) {
-                    data = "\uFEFF" + data;
-                }
-                var fd;
-                try {
-                    fd = _fs.openSync(fileName, "w");
-                    _fs.writeSync(fd, data, undefined, "utf8");
-                }
-                finally {
-                    if (fd !== undefined) {
-                        _fs.closeSync(fd);
-                    }
-                }
-            }
-            function getCanonicalPath(path) {
-                return useCaseSensitiveFileNames ? path : path.toLowerCase();
-            }
-            var FileSystemEntryKind;
-            (function (FileSystemEntryKind) {
-                FileSystemEntryKind[FileSystemEntryKind["File"] = 0] = "File";
-                FileSystemEntryKind[FileSystemEntryKind["Directory"] = 1] = "Directory";
-            })(FileSystemEntryKind || (FileSystemEntryKind = {}));
-            function fileSystemEntryExists(path, entryKind) {
-                try {
-                    var stat = _fs.statSync(path);
-                    switch (entryKind) {
-                        case 0 /* File */: return stat.isFile();
-                        case 1 /* Directory */: return stat.isDirectory();
-                    }
-                }
-                catch (e) {
-                    return false;
-                }
-            }
-            function fileExists(path) {
-                return fileSystemEntryExists(path, 0 /* File */);
-            }
-            function directoryExists(path) {
-                return fileSystemEntryExists(path, 1 /* Directory */);
-            }
-            function getDirectories(path) {
-                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1 /* Directory */); });
-            }
-            function readDirectory(path, extension, exclude) {
-                var result = [];
-                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
-                visitDirectory(path);
-                return result;
-                function visitDirectory(path) {
-                    var files = _fs.readdirSync(path || ".").sort();
-                    var directories = [];
-                    for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
-                        var current = files_2[_i];
-                        // This is necessary because on some file system node fails to exclude
-                        // "." and "..". See https://github.com/nodejs/node/issues/4002
-                        if (current === "." || current === "..") {
-                            continue;
-                        }
-                        var name_3 = ts.combinePaths(path, current);
-                        if (!ts.contains(exclude, getCanonicalPath(name_3))) {
-                            var stat = _fs.statSync(name_3);
-                            if (stat.isFile()) {
-                                if (!extension || ts.fileExtensionIs(name_3, extension)) {
-                                    result.push(name_3);
-                                }
-                            }
-                            else if (stat.isDirectory()) {
-                                directories.push(name_3);
-                            }
-                        }
-                    }
-                    for (var _a = 0, directories_1 = directories; _a < directories_1.length; _a++) {
-                        var current = directories_1[_a];
-                        visitDirectory(current);
-                    }
-                }
-            }
-            return {
-                args: process.argv.slice(2),
-                newLine: _os.EOL,
-                useCaseSensitiveFileNames: useCaseSensitiveFileNames,
-                write: function (s) {
-                    process.stdout.write(s);
-                },
-                readFile: readFile,
-                writeFile: writeFile,
-                watchFile: function (fileName, callback) {
-                    if (useNonPollingWatchers) {
-                        var watchedFile_1 = watchedFileSet.addFile(fileName, callback);
-                        return {
-                            close: function () { return watchedFileSet.removeFile(watchedFile_1); }
-                        };
-                    }
-                    else {
-                        _fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
-                        return {
-                            close: function () { return _fs.unwatchFile(fileName, fileChanged); }
-                        };
-                    }
-                    function fileChanged(curr, prev) {
-                        if (+curr.mtime <= +prev.mtime) {
-                            return;
-                        }
-                        callback(fileName);
-                    }
-                },
-                watchDirectory: function (directoryName, callback, recursive) {
-                    // Node 4.0 `fs.watch` function supports the "recursive" option on both OSX and Windows
-                    // (ref: https://github.com/nodejs/node/pull/2649 and https://github.com/Microsoft/TypeScript/issues/4643)
-                    var options;
-                    if (isNode4OrLater() && (process.platform === "win32" || process.platform === "darwin")) {
-                        options = { persistent: true, recursive: !!recursive };
-                    }
-                    else {
-                        options = { persistent: true };
-                    }
-                    return _fs.watch(directoryName, options, function (eventName, relativeFileName) {
-                        // In watchDirectory we only care about adding and removing files (when event name is
-                        // "rename"); changes made within files are handled by corresponding fileWatchers (when
-                        // event name is "change")
-                        if (eventName === "rename") {
-                            // When deleting a file, the passed baseFileName is null
-                            callback(!relativeFileName ? relativeFileName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
-                        }
-                        ;
-                    });
-                },
-                resolvePath: function (path) {
-                    return _path.resolve(path);
-                },
-                fileExists: fileExists,
-                directoryExists: directoryExists,
-                createDirectory: function (directoryName) {
-                    if (!this.directoryExists(directoryName)) {
-                        _fs.mkdirSync(directoryName);
-                    }
-                },
-                getExecutingFilePath: function () {
-                    return __filename;
-                },
-                getCurrentDirectory: function () {
-                    return process.cwd();
-                },
-                getDirectories: getDirectories,
-                readDirectory: readDirectory,
-                getModifiedTime: function (path) {
-                    try {
-                        return _fs.statSync(path).mtime;
-                    }
-                    catch (e) {
-                        return undefined;
-                    }
-                },
-                createHash: function (data) {
-                    var hash = _crypto.createHash("md5");
-                    hash.update(data);
-                    return hash.digest("hex");
-                },
-                getMemoryUsage: function () {
-                    if (global.gc) {
-                        global.gc();
-                    }
-                    return process.memoryUsage().heapUsed;
-                },
-                exit: function (exitCode) {
-                    process.exit(exitCode);
-                },
-                realpath: function (path) {
-                    return _fs.realpathSync(path);
-                }
-            };
-        }
-        function getChakraSystem() {
-            var realpath = ChakraHost.realpath && (function (path) { return ChakraHost.realpath(path); });
-            return {
-                newLine: ChakraHost.newLine || "\r\n",
-                args: ChakraHost.args,
-                useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
-                write: ChakraHost.echo,
-                readFile: function (path, encoding) {
-                    // encoding is automatically handled by the implementation in ChakraHost
-                    return ChakraHost.readFile(path);
-                },
-                writeFile: function (path, data, writeByteOrderMark) {
-                    // If a BOM is required, emit one
-                    if (writeByteOrderMark) {
-                        data = "\uFEFF" + data;
-                    }
-                    ChakraHost.writeFile(path, data);
-                },
-                resolvePath: ChakraHost.resolvePath,
-                fileExists: ChakraHost.fileExists,
-                directoryExists: ChakraHost.directoryExists,
-                createDirectory: ChakraHost.createDirectory,
-                getExecutingFilePath: function () { return ChakraHost.executingFile; },
-                getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
-                getDirectories: ChakraHost.getDirectories,
-                readDirectory: ChakraHost.readDirectory,
-                exit: ChakraHost.quit,
-                realpath: realpath
-            };
-        }
-        if (typeof ChakraHost !== "undefined") {
-            return getChakraSystem();
-        }
-        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
-            return getWScriptSystem();
-        }
-        else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
-            // process and process.nextTick checks if current environment is node-like
-            // process.browser check excludes webpack and browserify
-            return getNodeSystem();
-        }
-        else {
-            return undefined; // Unsupported host
-        }
-    })();
-})(ts || (ts = {}));
-// <auto-generated />
-/// <reference path="types.ts" />
-/* @internal */
-var ts;
-(function (ts) {
-    ts.Diagnostics = {
-        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
-        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
-        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
-        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
-        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
-        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
-        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
-        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
-        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
-        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
-        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
-        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
-        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
-        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
-        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
-        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
-        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
-        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
-        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
-        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
-        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
-        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
-        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
-        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
-        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
-        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
-        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
-        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
-        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
-        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
-        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
-        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
-        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
-        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
-        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
-        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
-        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
-        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
-        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
-        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
-        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
-        Type_0_is_not_a_valid_async_function_return_type: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_1055", message: "Type '{0}' is not a valid async function return type." },
-        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
-        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
-        Operand_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "Operand_for_await_does_not_have_a_valid_callable_then_member_1058", message: "Operand for 'await' does not have a valid callable 'then' member." },
-        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: { code: 1059, category: ts.DiagnosticCategory.Error, key: "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059", message: "Return expression in async function does not have a valid callable 'then' member." },
-        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: { code: 1060, category: ts.DiagnosticCategory.Error, key: "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060", message: "Expression body for async arrow function does not have a valid callable 'then' member." },
-        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
-        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
-        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
-        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
-        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
-        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
-        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
-        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
-        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
-        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
-        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher." },
-        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
-        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
-        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
-        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
-        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
-        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
-        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
-        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
-        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
-        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
-        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
-        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
-        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
-        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
-        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
-        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
-        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
-        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
-        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
-        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
-        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
-        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'" },
-        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
-        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
-        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
-        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
-        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
-        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
-        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
-        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
-        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
-        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
-        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
-        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
-        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
-        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
-        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
-        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
-        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
-        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
-        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
-        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
-        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
-        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
-        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
-        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
-        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
-        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
-        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
-        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
-        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
-        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
-        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
-        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
-        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
-        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
-        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
-        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
-        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
-        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
-        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
-        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
-        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
-        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
-        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
-        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
-        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
-        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
-        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
-        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
-        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
-        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
-        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
-        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
-        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
-        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
-        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
-        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
-        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
-        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
-        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
-        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
-        A_parameter_property_may_not_be_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_a_binding_pattern_1187", message: "A parameter property may not be a binding pattern." },
-        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
-        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
-        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
-        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
-        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
-        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
-        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
-        Catch_clause_variable_name_must_be_an_identifier: { code: 1195, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_name_must_be_an_identifier_1195", message: "Catch clause variable name must be an identifier." },
-        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
-        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
-        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
-        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
-        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
-        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk__1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
-        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_o_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
-        Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
-        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
-        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
-        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
-        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
-        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
-        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode" },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
-        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
-        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
-        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
-        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
-        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
-        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
-        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
-        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
-        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
-        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
-        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
-        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
-        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
-        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
-        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
-        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
-        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
-        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
-        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
-        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
-        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
-        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
-        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
-        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
-        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
-        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
-        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
-        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
-        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
-        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
-        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
-        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
-        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
-        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
-        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
-        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
-        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
-        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
-        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
-        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
-        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
-        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
-        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
-        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
-        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
-        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
-        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
-        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
-        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
-        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
-        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
-        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
-        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
-        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
-        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
-        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
-        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
-        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
-        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
-        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
-        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
-        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
-        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
-        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
-        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
-        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
-        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
-        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
-        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
-        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
-        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
-        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
-        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
-        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
-        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
-        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
-        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
-        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
-        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
-        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
-        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
-        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
-        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
-        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
-        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
-        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
-        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
-        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
-        Supplied_parameters_do_not_match_any_signature_of_call_target: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Supplied_parameters_do_not_match_any_signature_of_call_target_2346", message: "Supplied parameters do not match any signature of call target." },
-        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
-        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
-        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_2349", message: "Cannot invoke an expression whose type lacks a call signature." },
-        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
-        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
-        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
-        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
-        No_best_common_type_exists_among_return_expressions: { code: 2354, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_return_expressions_2354", message: "No best common type exists among return expressions." },
-        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
-        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
-        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357", message: "The operand of an increment or decrement operator must be a variable, property or indexer." },
-        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
-        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
-        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
-        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter" },
-        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
-        Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_of_assignment_expression_2364", message: "Invalid left-hand side of assignment expression." },
-        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
-        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
-        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'" },
-        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
-        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
-        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
-        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
-        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
-        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
-        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
-        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
-        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
-        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
-        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
-        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
-        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
-        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
-        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
-        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
-        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
-        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
-        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
-        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
-        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
-        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
-        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
-        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
-        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
-        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
-        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
-        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
-        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
-        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
-        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
-        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
-        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
-        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
-        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
-        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
-        Invalid_left_hand_side_in_for_in_statement: { code: 2406, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_in_statement_2406", message: "Invalid left-hand side in 'for...in' statement." },
-        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
-        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
-        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class" },
-        All_symbols_within_a_with_block_will_be_resolved_to_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "All_symbols_within_a_with_block_will_be_resolved_to_any_2410", message: "All symbols within a 'with' block will be resolved to 'any'." },
-        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
-        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
-        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
-        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'" },
-        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
-        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
-        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
-        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
-        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
-        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
-        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
-        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'" },
-        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
-        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
-        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'" },
-        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
-        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged" },
-        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged" },
-        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
-        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
-        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name" },
-        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'" },
-        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
-        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'" },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
-        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
-        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
-        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
-        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
-        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
-        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
-        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
-        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: { code: 2449, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449", message: "The operand of an increment or decrement operator cannot be a constant or a read-only property." },
-        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450", message: "Left-hand side of assignment expression cannot be a constant or a read-only property." },
-        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
-        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
-        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
-        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
-        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
-        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
-        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'" },
-        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
-        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
-        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
-        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
-        A_rest_element_must_be_last_in_an_array_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462", message: "A rest element must be last in an array destructuring pattern" },
-        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
-        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
-        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
-        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
-        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
-        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
-        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
-        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
-        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
-        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
-        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
-        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
-        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
-        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
-        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
-        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
-        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
-        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
-        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
-        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
-        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'" },
-        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2485, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485", message: "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2486, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486", message: "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property." },
-        Invalid_left_hand_side_in_for_of_statement: { code: 2487, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_of_statement_2487", message: "Invalid left-hand side in 'for...of' statement." },
-        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
-        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
-        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
-        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
-        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause" },
-        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
-        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
-        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
-        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
-        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
-        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
-        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
-        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
-        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
-        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
-        No_best_common_type_exists_among_yield_expressions: { code: 2504, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_yield_expressions_2504", message: "No best common type exists among yield expressions." },
-        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
-        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
-        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
-        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
-        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
-        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
-        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
-        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
-        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
-        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
-        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
-        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
-        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
-        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
-        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
-        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
-        The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_function_expression: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_2522", message: "The 'arguments' object cannot be referenced in an async arrow function. Consider using a standard async function expression." },
-        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
-        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
-        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
-        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
-        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
-        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
-        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
-        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
-        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
-        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
-        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
-        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
-        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
-        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
-        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
-        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'" },
-        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
-        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
-        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
-        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property" },
-        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property" },
-        Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: ts.DiagnosticCategory.Error, key: "Cannot_emit_namespaced_JSX_elements_in_React_2650", message: "Cannot emit namespaced JSX elements in React" },
-        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
-        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
-        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
-        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
-        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
-        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element" },
-        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'" },
-        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
-        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
-        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
-        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
-        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
-        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
-        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
-        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
-        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
-        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
-        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
-        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
-        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
-        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
-        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
-        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
-        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
-        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
-        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
-        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: { code: 2679, category: ts.DiagnosticCategory.Error, key: "A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void_2679", message: "A function that is called with the 'new' keyword cannot have a 'this' type that is 'void'." },
-        A_this_parameter_must_be_the_first_parameter: { code: 2680, category: ts.DiagnosticCategory.Error, key: "A_this_parameter_must_be_the_first_parameter_2680", message: "A 'this' parameter must be the first parameter." },
-        A_constructor_cannot_have_a_this_parameter: { code: 2681, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_have_a_this_parameter_2681", message: "A constructor cannot have a 'this' parameter." },
-        get_and_set_accessor_must_have_the_same_this_type: { code: 2682, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_this_type_2682", message: "'get' and 'set' accessor must have the same 'this' type." },
-        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
-        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
-        The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
-        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
-        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
-        Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
-        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4006, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4006", message: "Type parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4008, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4008", message: "Type parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4010, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4010", message: "Type parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4012, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4012", message: "Type parameter '{0}' of public method from exported class has or is using private name '{1}'." },
-        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4014, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", message: "Type parameter '{0}' of method from exported interface has or is using private name '{1}'." },
-        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4016, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", message: "Type parameter '{0}' of exported function has or is using private name '{1}'." },
-        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4019, category: ts.DiagnosticCategory.Error, key: "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", message: "Implements clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
-        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "Extends clause of exported interface '{0}' has or is using private name '{1}'." },
-        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4023, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", message: "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named." },
-        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: { code: 4024, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", message: "Exported variable '{0}' has or is using name '{1}' from private module '{2}'." },
-        Exported_variable_0_has_or_is_using_private_name_1: { code: 4025, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_private_name_1_4025", message: "Exported variable '{0}' has or is using private name '{1}'." },
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4026, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026", message: "Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4027, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4027", message: "Public static property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
-        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4028, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_private_name_1_4028", message: "Public static property '{0}' of exported class has or is using private name '{1}'." },
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4029, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029", message: "Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4030, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4030", message: "Public property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
-        Public_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4031, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_private_name_1_4031", message: "Public property '{0}' of exported class has or is using private name '{1}'." },
-        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4032, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4032", message: "Property '{0}' of exported interface has or is using name '{1}' from private module '{2}'." },
-        Property_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4033, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_private_name_1_4033", message: "Property '{0}' of exported interface has or is using private name '{1}'." },
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4034, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_4034", message: "Parameter '{0}' of public static property setter from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4035, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1_4035", message: "Parameter '{0}' of public static property setter from exported class has or is using private name '{1}'." },
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4036, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_4036", message: "Parameter '{0}' of public property setter from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4037, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1_4037", message: "Parameter '{0}' of public property setter from exported class has or is using private name '{1}'." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4038, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_externa_4038", message: "Return type of public static property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4039, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_4039", message: "Return type of public static property getter from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4040, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0_4040", message: "Return type of public static property getter from exported class has or is using private name '{0}'." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4041, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_modul_4041", message: "Return type of public property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4042, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_4042", message: "Return type of public property getter from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4043, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0_4043", message: "Return type of public property getter from exported class has or is using private name '{0}'." },
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4044, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_mod_4044", message: "Return type of constructor signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4045, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0_4045", message: "Return type of constructor signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4046, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4046", message: "Return type of call signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4047, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0_4047", message: "Return type of call signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4048, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4048", message: "Return type of index signature from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4049, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0_4049", message: "Return type of index signature from exported interface has or is using private name '{0}'." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4050, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module__4050", message: "Return type of public static method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4051, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4051", message: "Return type of public static method from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: { code: 4052, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0_4052", message: "Return type of public static method from exported class has or is using private name '{0}'." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4053, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_c_4053", message: "Return type of public method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4054, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4054", message: "Return type of public method from exported class has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: { code: 4055, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0_4055", message: "Return type of public method from exported class has or is using private name '{0}'." },
-        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4056, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4056", message: "Return type of method from exported interface has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: { code: 4057, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0_4057", message: "Return type of method from exported interface has or is using private name '{0}'." },
-        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4058, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named_4058", message: "Return type of exported function has or is using name '{0}' from external module {1} but cannot be named." },
-        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: { code: 4059, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1_4059", message: "Return type of exported function has or is using name '{0}' from private module '{1}'." },
-        Return_type_of_exported_function_has_or_is_using_private_name_0: { code: 4060, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_private_name_0_4060", message: "Return type of exported function has or is using private name '{0}'." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4061, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_can_4061", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4062, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2_4062", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: { code: 4063, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1_4063", message: "Parameter '{0}' of constructor from exported class has or is using private name '{1}'." },
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4064, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_mod_4064", message: "Parameter '{0}' of constructor signature from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4065, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4065", message: "Parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4066, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4066", message: "Parameter '{0}' of call signature from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4067, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4067", message: "Parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4068, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module__4068", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4069, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4069", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4070, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4070", message: "Parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4071, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_c_4071", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4072, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4072", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4073, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4073", message: "Parameter '{0}' of public method from exported class has or is using private name '{1}'." },
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4074, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4074", message: "Parameter '{0}' of method from exported interface has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4075, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4075", message: "Parameter '{0}' of method from exported interface has or is using private name '{1}'." },
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4076, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4076", message: "Parameter '{0}' of exported function has or is using name '{1}' from external module {2} but cannot be named." },
-        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: { code: 4077, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2_4077", message: "Parameter '{0}' of exported function has or is using name '{1}' from private module '{2}'." },
-        Parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4078, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", message: "Parameter '{0}' of exported function has or is using private name '{1}'." },
-        Exported_type_alias_0_has_or_is_using_private_name_1: { code: 4081, category: ts.DiagnosticCategory.Error, key: "Exported_type_alias_0_has_or_is_using_private_name_1_4081", message: "Exported type alias '{0}' has or is using private name '{1}'." },
-        Default_export_of_the_module_has_or_is_using_private_name_0: { code: 4082, category: ts.DiagnosticCategory.Error, key: "Default_export_of_the_module_has_or_is_using_private_name_0_4082", message: "Default export of the module has or is using private name '{0}'." },
-        Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict: { code: 4090, category: ts.DiagnosticCategory.Message, key: "Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_t_4090", message: "Conflicting library definitions for '{0}' found at '{1}' and '{2}'. Copy the correct file to the 'typings' folder to resolve this conflict." },
-        The_current_host_does_not_support_the_0_option: { code: 5001, category: ts.DiagnosticCategory.Error, key: "The_current_host_does_not_support_the_0_option_5001", message: "The current host does not support the '{0}' option." },
-        Cannot_find_the_common_subdirectory_path_for_the_input_files: { code: 5009, category: ts.DiagnosticCategory.Error, key: "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", message: "Cannot find the common subdirectory path for the input files." },
-        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}" },
-        Unsupported_file_encoding: { code: 5013, category: ts.DiagnosticCategory.Error, key: "Unsupported_file_encoding_5013", message: "Unsupported file encoding." },
-        Failed_to_parse_file_0_Colon_1: { code: 5014, category: ts.DiagnosticCategory.Error, key: "Failed_to_parse_file_0_Colon_1_5014", message: "Failed to parse file '{0}': {1}." },
-        Unknown_compiler_option_0: { code: 5023, category: ts.DiagnosticCategory.Error, key: "Unknown_compiler_option_0_5023", message: "Unknown compiler option '{0}'." },
-        Compiler_option_0_requires_a_value_of_type_1: { code: 5024, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_requires_a_value_of_type_1_5024", message: "Compiler option '{0}' requires a value of type {1}." },
-        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}" },
-        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: { code: 5042, category: ts.DiagnosticCategory.Error, key: "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", message: "Option 'project' cannot be mixed with source files on a command line." },
-        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: { code: 5047, category: ts.DiagnosticCategory.Error, key: "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", message: "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher." },
-        Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: { code: 5051, category: ts.DiagnosticCategory.Error, key: "Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_prov_5051", message: "Option 'inlineSources' can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided." },
-        Option_0_cannot_be_specified_without_specifying_option_1: { code: 5052, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_without_specifying_option_1_5052", message: "Option '{0}' cannot be specified without specifying option '{1}'." },
-        Option_0_cannot_be_specified_with_option_1: { code: 5053, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_with_option_1_5053", message: "Option '{0}' cannot be specified with option '{1}'." },
-        A_tsconfig_json_file_is_already_defined_at_Colon_0: { code: 5054, category: ts.DiagnosticCategory.Error, key: "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", message: "A 'tsconfig.json' file is already defined at: '{0}'." },
-        Cannot_write_file_0_because_it_would_overwrite_input_file: { code: 5055, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", message: "Cannot write file '{0}' because it would overwrite input file." },
-        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: { code: 5056, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", message: "Cannot write file '{0}' because it would be overwritten by multiple input files." },
-        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'" },
-        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'" },
-        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: { code: 5059, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", message: "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier." },
-        Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
-        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
-        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
-        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
-        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
-        Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
-        Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
-        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: { code: 6003, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", message: "Specify the location where debugger should locate map files instead of generated locations." },
-        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: { code: 6004, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations_6004", message: "Specify the location where debugger should locate TypeScript files instead of source locations." },
-        Watch_input_files: { code: 6005, category: ts.DiagnosticCategory.Message, key: "Watch_input_files_6005", message: "Watch input files." },
-        Redirect_output_structure_to_the_directory: { code: 6006, category: ts.DiagnosticCategory.Message, key: "Redirect_output_structure_to_the_directory_6006", message: "Redirect output structure to the directory." },
-        Do_not_erase_const_enum_declarations_in_generated_code: { code: 6007, category: ts.DiagnosticCategory.Message, key: "Do_not_erase_const_enum_declarations_in_generated_code_6007", message: "Do not erase const enum declarations in generated code." },
-        Do_not_emit_outputs_if_any_errors_were_reported: { code: 6008, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_if_any_errors_were_reported_6008", message: "Do not emit outputs if any errors were reported." },
-        Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
-        Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
-        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
-        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
-        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
-        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
-        Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
-        Print_the_compiler_s_version: { code: 6019, category: ts.DiagnosticCategory.Message, key: "Print_the_compiler_s_version_6019", message: "Print the compiler's version." },
-        Compile_the_project_in_the_given_directory: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_in_the_given_directory_6020", message: "Compile the project in the given directory." },
-        Syntax_Colon_0: { code: 6023, category: ts.DiagnosticCategory.Message, key: "Syntax_Colon_0_6023", message: "Syntax: {0}" },
-        options: { code: 6024, category: ts.DiagnosticCategory.Message, key: "options_6024", message: "options" },
-        file: { code: 6025, category: ts.DiagnosticCategory.Message, key: "file_6025", message: "file" },
-        Examples_Colon_0: { code: 6026, category: ts.DiagnosticCategory.Message, key: "Examples_Colon_0_6026", message: "Examples: {0}" },
-        Options_Colon: { code: 6027, category: ts.DiagnosticCategory.Message, key: "Options_Colon_6027", message: "Options:" },
-        Version_0: { code: 6029, category: ts.DiagnosticCategory.Message, key: "Version_0_6029", message: "Version {0}" },
-        Insert_command_line_options_and_files_from_a_file: { code: 6030, category: ts.DiagnosticCategory.Message, key: "Insert_command_line_options_and_files_from_a_file_6030", message: "Insert command line options and files from a file." },
-        File_change_detected_Starting_incremental_compilation: { code: 6032, category: ts.DiagnosticCategory.Message, key: "File_change_detected_Starting_incremental_compilation_6032", message: "File change detected. Starting incremental compilation..." },
-        KIND: { code: 6034, category: ts.DiagnosticCategory.Message, key: "KIND_6034", message: "KIND" },
-        FILE: { code: 6035, category: ts.DiagnosticCategory.Message, key: "FILE_6035", message: "FILE" },
-        VERSION: { code: 6036, category: ts.DiagnosticCategory.Message, key: "VERSION_6036", message: "VERSION" },
-        LOCATION: { code: 6037, category: ts.DiagnosticCategory.Message, key: "LOCATION_6037", message: "LOCATION" },
-        DIRECTORY: { code: 6038, category: ts.DiagnosticCategory.Message, key: "DIRECTORY_6038", message: "DIRECTORY" },
-        Compilation_complete_Watching_for_file_changes: { code: 6042, category: ts.DiagnosticCategory.Message, key: "Compilation_complete_Watching_for_file_changes_6042", message: "Compilation complete. Watching for file changes." },
-        Generates_corresponding_map_file: { code: 6043, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_map_file_6043", message: "Generates corresponding '.map' file." },
-        Compiler_option_0_expects_an_argument: { code: 6044, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_expects_an_argument_6044", message: "Compiler option '{0}' expects an argument." },
-        Unterminated_quoted_string_in_response_file_0: { code: 6045, category: ts.DiagnosticCategory.Error, key: "Unterminated_quoted_string_in_response_file_0_6045", message: "Unterminated quoted string in response file '{0}'." },
-        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}" },
-        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: { code: 6048, category: ts.DiagnosticCategory.Error, key: "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", message: "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'." },
-        Unsupported_locale_0: { code: 6049, category: ts.DiagnosticCategory.Error, key: "Unsupported_locale_0_6049", message: "Unsupported locale '{0}'." },
-        Unable_to_open_file_0: { code: 6050, category: ts.DiagnosticCategory.Error, key: "Unable_to_open_file_0_6050", message: "Unable to open file '{0}'." },
-        Corrupted_locale_file_0: { code: 6051, category: ts.DiagnosticCategory.Error, key: "Corrupted_locale_file_0_6051", message: "Corrupted locale file {0}." },
-        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: { code: 6052, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_expressions_and_declarations_with_an_implied_any_type_6052", message: "Raise error on expressions and declarations with an implied 'any' type." },
-        File_0_not_found: { code: 6053, category: ts.DiagnosticCategory.Error, key: "File_0_not_found_6053", message: "File '{0}' not found." },
-        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: { code: 6054, category: ts.DiagnosticCategory.Error, key: "File_0_has_unsupported_extension_The_only_supported_extensions_are_1_6054", message: "File '{0}' has unsupported extension. The only supported extensions are {1}." },
-        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: { code: 6055, category: ts.DiagnosticCategory.Message, key: "Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures_6055", message: "Suppress noImplicitAny errors for indexing objects lacking index signatures." },
-        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: { code: 6056, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_declarations_for_code_that_has_an_internal_annotation_6056", message: "Do not emit declarations for code that has an '@internal' annotation." },
-        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: { code: 6058, category: ts.DiagnosticCategory.Message, key: "Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir_6058", message: "Specify the root directory of input files. Use to control the output directory structure with --outDir." },
-        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: { code: 6059, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files_6059", message: "File '{0}' is not under 'rootDir' '{1}'. 'rootDir' is expected to contain all source files." },
-        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: { code: 6060, category: ts.DiagnosticCategory.Message, key: "Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix_6060", message: "Specify the end of line sequence to be used when emitting files: 'CRLF' (dos) or 'LF' (unix)." },
-        NEWLINE: { code: 6061, category: ts.DiagnosticCategory.Message, key: "NEWLINE_6061", message: "NEWLINE" },
-        Option_0_can_only_be_specified_in_tsconfig_json_file: { code: 6064, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_specified_in_tsconfig_json_file_6064", message: "Option '{0}' can only be specified in 'tsconfig.json' file." },
-        Enables_experimental_support_for_ES7_decorators: { code: 6065, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_decorators_6065", message: "Enables experimental support for ES7 decorators." },
-        Enables_experimental_support_for_emitting_type_metadata_for_decorators: { code: 6066, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_emitting_type_metadata_for_decorators_6066", message: "Enables experimental support for emitting type metadata for decorators." },
-        Enables_experimental_support_for_ES7_async_functions: { code: 6068, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_async_functions_6068", message: "Enables experimental support for ES7 async functions." },
-        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: { code: 6069, category: ts.DiagnosticCategory.Message, key: "Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6_6069", message: "Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6)." },
-        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: { code: 6070, category: ts.DiagnosticCategory.Message, key: "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", message: "Initializes a TypeScript project and creates a tsconfig.json file." },
-        Successfully_created_a_tsconfig_json_file: { code: 6071, category: ts.DiagnosticCategory.Message, key: "Successfully_created_a_tsconfig_json_file_6071", message: "Successfully created a tsconfig.json file." },
-        Suppress_excess_property_checks_for_object_literals: { code: 6072, category: ts.DiagnosticCategory.Message, key: "Suppress_excess_property_checks_for_object_literals_6072", message: "Suppress excess property checks for object literals." },
-        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context. (experimental)" },
-        Do_not_report_errors_on_unused_labels: { code: 6074, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unused_labels_6074", message: "Do not report errors on unused labels." },
-        Report_error_when_not_all_code_paths_in_function_return_a_value: { code: 6075, category: ts.DiagnosticCategory.Message, key: "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", message: "Report error when not all code paths in function return a value." },
-        Report_errors_for_fallthrough_cases_in_switch_statement: { code: 6076, category: ts.DiagnosticCategory.Message, key: "Report_errors_for_fallthrough_cases_in_switch_statement_6076", message: "Report errors for fallthrough cases in switch statement." },
-        Do_not_report_errors_on_unreachable_code: { code: 6077, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unreachable_code_6077", message: "Do not report errors on unreachable code." },
-        Disallow_inconsistently_cased_references_to_the_same_file: { code: 6078, category: ts.DiagnosticCategory.Message, key: "Disallow_inconsistently_cased_references_to_the_same_file_6078", message: "Disallow inconsistently-cased references to the same file." },
-        Specify_library_files_to_be_included_in_the_compilation_Colon: { code: 6079, category: ts.DiagnosticCategory.Message, key: "Specify_library_files_to_be_included_in_the_compilation_Colon_6079", message: "Specify library files to be included in the compilation: " },
-        Specify_JSX_code_generation_Colon_preserve_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_or_react_6080", message: "Specify JSX code generation: 'preserve' or 'react'" },
-        Only_amd_and_system_modules_are_supported_alongside_0: { code: 6082, category: ts.DiagnosticCategory.Error, key: "Only_amd_and_system_modules_are_supported_alongside_0_6082", message: "Only 'amd' and 'system' modules are supported alongside --{0}." },
-        Base_directory_to_resolve_non_absolute_module_names: { code: 6083, category: ts.DiagnosticCategory.Message, key: "Base_directory_to_resolve_non_absolute_module_names_6083", message: "Base directory to resolve non-absolute module names." },
-        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084", message: "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit" },
-        Enable_tracing_of_the_name_resolution_process: { code: 6085, category: ts.DiagnosticCategory.Message, key: "Enable_tracing_of_the_name_resolution_process_6085", message: "Enable tracing of the name resolution process." },
-        Resolving_module_0_from_1: { code: 6086, category: ts.DiagnosticCategory.Message, key: "Resolving_module_0_from_1_6086", message: "======== Resolving module '{0}' from '{1}'. ========" },
-        Explicitly_specified_module_resolution_kind_Colon_0: { code: 6087, category: ts.DiagnosticCategory.Message, key: "Explicitly_specified_module_resolution_kind_Colon_0_6087", message: "Explicitly specified module resolution kind: '{0}'." },
-        Module_resolution_kind_is_not_specified_using_0: { code: 6088, category: ts.DiagnosticCategory.Message, key: "Module_resolution_kind_is_not_specified_using_0_6088", message: "Module resolution kind is not specified, using '{0}'." },
-        Module_name_0_was_successfully_resolved_to_1: { code: 6089, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_successfully_resolved_to_1_6089", message: "======== Module name '{0}' was successfully resolved to '{1}'. ========" },
-        Module_name_0_was_not_resolved: { code: 6090, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_not_resolved_6090", message: "======== Module name '{0}' was not resolved. ========" },
-        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: { code: 6091, category: ts.DiagnosticCategory.Message, key: "paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0_6091", message: "'paths' option is specified, looking for a pattern to match module name '{0}'." },
-        Module_name_0_matched_pattern_1: { code: 6092, category: ts.DiagnosticCategory.Message, key: "Module_name_0_matched_pattern_1_6092", message: "Module name '{0}', matched pattern '{1}'." },
-        Trying_substitution_0_candidate_module_location_Colon_1: { code: 6093, category: ts.DiagnosticCategory.Message, key: "Trying_substitution_0_candidate_module_location_Colon_1_6093", message: "Trying substitution '{0}', candidate module location: '{1}'." },
-        Resolving_module_name_0_relative_to_base_url_1_2: { code: 6094, category: ts.DiagnosticCategory.Message, key: "Resolving_module_name_0_relative_to_base_url_1_2_6094", message: "Resolving module name '{0}' relative to base url '{1}' - '{2}'." },
-        Loading_module_as_file_Slash_folder_candidate_module_location_0: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095", message: "Loading module as file / folder, candidate module location '{0}'." },
-        File_0_does_not_exist: { code: 6096, category: ts.DiagnosticCategory.Message, key: "File_0_does_not_exist_6096", message: "File '{0}' does not exist." },
-        File_0_exist_use_it_as_a_name_resolution_result: { code: 6097, category: ts.DiagnosticCategory.Message, key: "File_0_exist_use_it_as_a_name_resolution_result_6097", message: "File '{0}' exist - use it as a name resolution result." },
-        Loading_module_0_from_node_modules_folder: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_6098", message: "Loading module '{0}' from 'node_modules' folder." },
-        Found_package_json_at_0: { code: 6099, category: ts.DiagnosticCategory.Message, key: "Found_package_json_at_0_6099", message: "Found 'package.json' at '{0}'." },
-        package_json_does_not_have_types_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_types_field_6100", message: "'package.json' does not have 'types' field." },
-        package_json_has_0_field_1_that_references_2: { code: 6101, category: ts.DiagnosticCategory.Message, key: "package_json_has_0_field_1_that_references_2_6101", message: "'package.json' has '{0}' field '{1}' that references '{2}'." },
-        Allow_javascript_files_to_be_compiled: { code: 6102, category: ts.DiagnosticCategory.Message, key: "Allow_javascript_files_to_be_compiled_6102", message: "Allow javascript files to be compiled." },
-        Option_0_should_have_array_of_strings_as_a_value: { code: 6103, category: ts.DiagnosticCategory.Error, key: "Option_0_should_have_array_of_strings_as_a_value_6103", message: "Option '{0}' should have array of strings as a value." },
-        Checking_if_0_is_the_longest_matching_prefix_for_1_2: { code: 6104, category: ts.DiagnosticCategory.Message, key: "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", message: "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'." },
-        Expected_type_of_0_field_in_package_json_to_be_string_got_1: { code: 6105, category: ts.DiagnosticCategory.Message, key: "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", message: "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'." },
-        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'" },
-        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'" },
-        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'" },
-        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'" },
-        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'" },
-        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed" },
-        Do_not_emit_use_strict_directives_in_module_output: { code: 6112, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_use_strict_directives_in_module_output_6112", message: "Do not emit 'use strict' directives in module output." },
-        Enable_strict_null_checks: { code: 6113, category: ts.DiagnosticCategory.Message, key: "Enable_strict_null_checks_6113", message: "Enable strict null checks." },
-        Unknown_option_excludes_Did_you_mean_exclude: { code: 6114, category: ts.DiagnosticCategory.Error, key: "Unknown_option_excludes_Did_you_mean_exclude_6114", message: "Unknown option 'excludes'. Did you mean 'exclude'?" },
-        Raise_error_on_this_expressions_with_an_implied_any_type: { code: 6115, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_this_expressions_with_an_implied_any_type_6115", message: "Raise error on 'this' expressions with an implied 'any' type." },
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: { code: 6116, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_2_6116", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory '{2}'. ========" },
-        Resolving_using_primary_search_paths: { code: 6117, category: ts.DiagnosticCategory.Message, key: "Resolving_using_primary_search_paths_6117", message: "Resolving using primary search paths..." },
-        Resolving_from_node_modules_folder: { code: 6118, category: ts.DiagnosticCategory.Message, key: "Resolving_from_node_modules_folder_6118", message: "Resolving from node_modules folder..." },
-        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: { code: 6119, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", message: "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========" },
-        Type_reference_directive_0_was_not_resolved: { code: 6120, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_not_resolved_6120", message: "======== Type reference directive '{0}' was not resolved. ========" },
-        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'" },
-        Root_directory_cannot_be_determined_skipping_primary_search_paths: { code: 6122, category: ts.DiagnosticCategory.Message, key: "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", message: "Root directory cannot be determined, skipping primary search paths." },
-        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: { code: 6123, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========" },
-        Type_declaration_files_to_be_included_in_compilation: { code: 6124, category: ts.DiagnosticCategory.Message, key: "Type_declaration_files_to_be_included_in_compilation_6124", message: "Type declaration files to be included in compilation." },
-        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'" },
-        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: { code: 6126, category: ts.DiagnosticCategory.Message, key: "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", message: "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder." },
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: { code: 6127, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", message: "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========" },
-        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
-        The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
-        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
-        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
-        Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
-        Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
-        Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
-        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: { code: 7009, category: ts.DiagnosticCategory.Error, key: "new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type_7009", message: "'new' expression, whose target lacks a construct signature, implicitly has an 'any' type." },
-        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: { code: 7010, category: ts.DiagnosticCategory.Error, key: "_0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type_7010", message: "'{0}', which lacks return-type annotation, implicitly has an '{1}' return type." },
-        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: { code: 7011, category: ts.DiagnosticCategory.Error, key: "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", message: "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type." },
-        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7013, category: ts.DiagnosticCategory.Error, key: "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", message: "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type." },
-        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: { code: 7015, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", message: "Element implicitly has an 'any' type because index expression is not of type 'number'." },
-        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation: { code: 7016, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation_7016", message: "Property '{0}' implicitly has type 'any', because its 'set' accessor lacks a type annotation." },
-        Index_signature_of_object_type_implicitly_has_an_any_type: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Index_signature_of_object_type_implicitly_has_an_any_type_7017", message: "Index signature of object type implicitly has an 'any' type." },
-        Object_literal_s_property_0_implicitly_has_an_1_type: { code: 7018, category: ts.DiagnosticCategory.Error, key: "Object_literal_s_property_0_implicitly_has_an_1_type_7018", message: "Object literal's property '{0}' implicitly has an '{1}' type." },
-        Rest_parameter_0_implicitly_has_an_any_type: { code: 7019, category: ts.DiagnosticCategory.Error, key: "Rest_parameter_0_implicitly_has_an_any_type_7019", message: "Rest parameter '{0}' implicitly has an 'any[]' type." },
-        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7020, category: ts.DiagnosticCategory.Error, key: "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", message: "Call signature, which lacks return-type annotation, implicitly has an 'any' return type." },
-        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: { code: 7022, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or__7022", message: "'{0}' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer." },
-        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7023, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", message: "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
-        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7024, category: ts.DiagnosticCategory.Error, key: "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", message: "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
-        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: { code: 7025, category: ts.DiagnosticCategory.Error, key: "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", message: "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type." },
-        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists" },
-        Unreachable_code_detected: { code: 7027, category: ts.DiagnosticCategory.Error, key: "Unreachable_code_detected_7027", message: "Unreachable code detected." },
-        Unused_label: { code: 7028, category: ts.DiagnosticCategory.Error, key: "Unused_label_7028", message: "Unused label." },
-        Fallthrough_case_in_switch: { code: 7029, category: ts.DiagnosticCategory.Error, key: "Fallthrough_case_in_switch_7029", message: "Fallthrough case in switch." },
-        Not_all_code_paths_return_a_value: { code: 7030, category: ts.DiagnosticCategory.Error, key: "Not_all_code_paths_return_a_value_7030", message: "Not all code paths return a value." },
-        Binding_element_0_implicitly_has_an_1_type: { code: 7031, category: ts.DiagnosticCategory.Error, key: "Binding_element_0_implicitly_has_an_1_type_7031", message: "Binding element '{0}' implicitly has an '{1}' type." },
-        You_cannot_rename_this_element: { code: 8000, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_this_element_8000", message: "You cannot rename this element." },
-        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: { code: 8001, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", message: "You cannot rename elements that are defined in the standard TypeScript library." },
-        import_can_only_be_used_in_a_ts_file: { code: 8002, category: ts.DiagnosticCategory.Error, key: "import_can_only_be_used_in_a_ts_file_8002", message: "'import ... =' can only be used in a .ts file." },
-        export_can_only_be_used_in_a_ts_file: { code: 8003, category: ts.DiagnosticCategory.Error, key: "export_can_only_be_used_in_a_ts_file_8003", message: "'export=' can only be used in a .ts file." },
-        type_parameter_declarations_can_only_be_used_in_a_ts_file: { code: 8004, category: ts.DiagnosticCategory.Error, key: "type_parameter_declarations_can_only_be_used_in_a_ts_file_8004", message: "'type parameter declarations' can only be used in a .ts file." },
-        implements_clauses_can_only_be_used_in_a_ts_file: { code: 8005, category: ts.DiagnosticCategory.Error, key: "implements_clauses_can_only_be_used_in_a_ts_file_8005", message: "'implements clauses' can only be used in a .ts file." },
-        interface_declarations_can_only_be_used_in_a_ts_file: { code: 8006, category: ts.DiagnosticCategory.Error, key: "interface_declarations_can_only_be_used_in_a_ts_file_8006", message: "'interface declarations' can only be used in a .ts file." },
-        module_declarations_can_only_be_used_in_a_ts_file: { code: 8007, category: ts.DiagnosticCategory.Error, key: "module_declarations_can_only_be_used_in_a_ts_file_8007", message: "'module declarations' can only be used in a .ts file." },
-        type_aliases_can_only_be_used_in_a_ts_file: { code: 8008, category: ts.DiagnosticCategory.Error, key: "type_aliases_can_only_be_used_in_a_ts_file_8008", message: "'type aliases' can only be used in a .ts file." },
-        _0_can_only_be_used_in_a_ts_file: { code: 8009, category: ts.DiagnosticCategory.Error, key: "_0_can_only_be_used_in_a_ts_file_8009", message: "'{0}' can only be used in a .ts file." },
-        types_can_only_be_used_in_a_ts_file: { code: 8010, category: ts.DiagnosticCategory.Error, key: "types_can_only_be_used_in_a_ts_file_8010", message: "'types' can only be used in a .ts file." },
-        type_arguments_can_only_be_used_in_a_ts_file: { code: 8011, category: ts.DiagnosticCategory.Error, key: "type_arguments_can_only_be_used_in_a_ts_file_8011", message: "'type arguments' can only be used in a .ts file." },
-        parameter_modifiers_can_only_be_used_in_a_ts_file: { code: 8012, category: ts.DiagnosticCategory.Error, key: "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", message: "'parameter modifiers' can only be used in a .ts file." },
-        property_declarations_can_only_be_used_in_a_ts_file: { code: 8014, category: ts.DiagnosticCategory.Error, key: "property_declarations_can_only_be_used_in_a_ts_file_8014", message: "'property declarations' can only be used in a .ts file." },
-        enum_declarations_can_only_be_used_in_a_ts_file: { code: 8015, category: ts.DiagnosticCategory.Error, key: "enum_declarations_can_only_be_used_in_a_ts_file_8015", message: "'enum declarations' can only be used in a .ts file." },
-        type_assertion_expressions_can_only_be_used_in_a_ts_file: { code: 8016, category: ts.DiagnosticCategory.Error, key: "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", message: "'type assertion expressions' can only be used in a .ts file." },
-        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses." },
-        class_expressions_are_not_currently_supported: { code: 9003, category: ts.DiagnosticCategory.Error, key: "class_expressions_are_not_currently_supported_9003", message: "'class' expressions are not currently supported." },
-        JSX_attributes_must_only_be_assigned_a_non_empty_expression: { code: 17000, category: ts.DiagnosticCategory.Error, key: "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", message: "JSX attributes must only be assigned a non-empty 'expression'." },
-        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: { code: 17001, category: ts.DiagnosticCategory.Error, key: "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", message: "JSX elements cannot have multiple attributes with the same name." },
-        Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: ts.DiagnosticCategory.Error, key: "Expected_corresponding_JSX_closing_tag_for_0_17002", message: "Expected corresponding JSX closing tag for '{0}'." },
-        JSX_attribute_expected: { code: 17003, category: ts.DiagnosticCategory.Error, key: "JSX_attribute_expected_17003", message: "JSX attribute expected." },
-        Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: ts.DiagnosticCategory.Error, key: "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", message: "Cannot use JSX unless the '--jsx' flag is provided." },
-        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'" },
-        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17006, category: ts.DiagnosticCategory.Error, key: "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", message: "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
-        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17007, category: ts.DiagnosticCategory.Error, key: "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", message: "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
-        JSX_element_0_has_no_corresponding_closing_tag: { code: 17008, category: ts.DiagnosticCategory.Error, key: "JSX_element_0_has_no_corresponding_closing_tag_17008", message: "JSX element '{0}' has no corresponding closing tag." },
-        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: { code: 17009, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", message: "'super' must be called before accessing 'this' in the constructor of a derived class." },
-        Unknown_typing_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_typing_option_0_17010", message: "Unknown typing option '{0}'." }
-    };
-})(ts || (ts = {}));
-/// <reference path="core.ts"/>
-/// <reference path="diagnosticInformationMap.generated.ts"/>
-var ts;
-(function (ts) {
-    /* @internal */
-    function tokenIsIdentifierOrKeyword(token) {
-        return token >= 69 /* Identifier */;
-    }
-    ts.tokenIsIdentifierOrKeyword = tokenIsIdentifierOrKeyword;
-    var textToToken = {
-        "abstract": 115 /* AbstractKeyword */,
-        "any": 117 /* AnyKeyword */,
-        "as": 116 /* AsKeyword */,
-        "boolean": 120 /* BooleanKeyword */,
-        "break": 70 /* BreakKeyword */,
-        "case": 71 /* CaseKeyword */,
-        "catch": 72 /* CatchKeyword */,
-        "class": 73 /* ClassKeyword */,
-        "continue": 75 /* ContinueKeyword */,
-        "const": 74 /* ConstKeyword */,
-        "constructor": 121 /* ConstructorKeyword */,
-        "debugger": 76 /* DebuggerKeyword */,
-        "declare": 122 /* DeclareKeyword */,
-        "default": 77 /* DefaultKeyword */,
-        "delete": 78 /* DeleteKeyword */,
-        "do": 79 /* DoKeyword */,
-        "else": 80 /* ElseKeyword */,
-        "enum": 81 /* EnumKeyword */,
-        "export": 82 /* ExportKeyword */,
-        "extends": 83 /* ExtendsKeyword */,
-        "false": 84 /* FalseKeyword */,
-        "finally": 85 /* FinallyKeyword */,
-        "for": 86 /* ForKeyword */,
-        "from": 136 /* FromKeyword */,
-        "function": 87 /* FunctionKeyword */,
-        "get": 123 /* GetKeyword */,
-        "if": 88 /* IfKeyword */,
-        "implements": 106 /* ImplementsKeyword */,
-        "import": 89 /* ImportKeyword */,
-        "in": 90 /* InKeyword */,
-        "instanceof": 91 /* InstanceOfKeyword */,
-        "interface": 107 /* InterfaceKeyword */,
-        "is": 124 /* IsKeyword */,
-        "let": 108 /* LetKeyword */,
-        "module": 125 /* ModuleKeyword */,
-        "namespace": 126 /* NamespaceKeyword */,
-        "never": 127 /* NeverKeyword */,
-        "new": 92 /* NewKeyword */,
-        "null": 93 /* NullKeyword */,
-        "number": 130 /* NumberKeyword */,
-        "package": 109 /* PackageKeyword */,
-        "private": 110 /* PrivateKeyword */,
-        "protected": 111 /* ProtectedKeyword */,
-        "public": 112 /* PublicKeyword */,
-        "readonly": 128 /* ReadonlyKeyword */,
-        "require": 129 /* RequireKeyword */,
-        "global": 137 /* GlobalKeyword */,
-        "return": 94 /* ReturnKeyword */,
-        "set": 131 /* SetKeyword */,
-        "static": 113 /* StaticKeyword */,
-        "string": 132 /* StringKeyword */,
-        "super": 95 /* SuperKeyword */,
-        "switch": 96 /* SwitchKeyword */,
-        "symbol": 133 /* SymbolKeyword */,
-        "this": 97 /* ThisKeyword */,
-        "throw": 98 /* ThrowKeyword */,
-        "true": 99 /* TrueKeyword */,
-        "try": 100 /* TryKeyword */,
-        "type": 134 /* TypeKeyword */,
-        "typeof": 101 /* TypeOfKeyword */,
-        "undefined": 135 /* UndefinedKeyword */,
-        "var": 102 /* VarKeyword */,
-        "void": 103 /* VoidKeyword */,
-        "while": 104 /* WhileKeyword */,
-        "with": 105 /* WithKeyword */,
-        "yield": 114 /* YieldKeyword */,
-        "async": 118 /* AsyncKeyword */,
-        "await": 119 /* AwaitKeyword */,
-        "of": 138 /* OfKeyword */,
-        "{": 15 /* OpenBraceToken */,
-        "}": 16 /* CloseBraceToken */,
-        "(": 17 /* OpenParenToken */,
-        ")": 18 /* CloseParenToken */,
-        "[": 19 /* OpenBracketToken */,
-        "]": 20 /* CloseBracketToken */,
-        ".": 21 /* DotToken */,
-        "...": 22 /* DotDotDotToken */,
-        ";": 23 /* SemicolonToken */,
-        ",": 24 /* CommaToken */,
-        "<": 25 /* LessThanToken */,
-        ">": 27 /* GreaterThanToken */,
-        "<=": 28 /* LessThanEqualsToken */,
-        ">=": 29 /* GreaterThanEqualsToken */,
-        "==": 30 /* EqualsEqualsToken */,
-        "!=": 31 /* ExclamationEqualsToken */,
-        "===": 32 /* EqualsEqualsEqualsToken */,
-        "!==": 33 /* ExclamationEqualsEqualsToken */,
-        "=>": 34 /* EqualsGreaterThanToken */,
-        "+": 35 /* PlusToken */,
-        "-": 36 /* MinusToken */,
-        "**": 38 /* AsteriskAsteriskToken */,
-        "*": 37 /* AsteriskToken */,
-        "/": 39 /* SlashToken */,
-        "%": 40 /* PercentToken */,
-        "++": 41 /* PlusPlusToken */,
-        "--": 42 /* MinusMinusToken */,
-        "<<": 43 /* LessThanLessThanToken */,
-        "</": 26 /* LessThanSlashToken */,
-        ">>": 44 /* GreaterThanGreaterThanToken */,
-        ">>>": 45 /* GreaterThanGreaterThanGreaterThanToken */,
-        "&": 46 /* AmpersandToken */,
-        "|": 47 /* BarToken */,
-        "^": 48 /* CaretToken */,
-        "!": 49 /* ExclamationToken */,
-        "~": 50 /* TildeToken */,
-        "&&": 51 /* AmpersandAmpersandToken */,
-        "||": 52 /* BarBarToken */,
-        "?": 53 /* QuestionToken */,
-        ":": 54 /* ColonToken */,
-        "=": 56 /* EqualsToken */,
-        "+=": 57 /* PlusEqualsToken */,
-        "-=": 58 /* MinusEqualsToken */,
-        "*=": 59 /* AsteriskEqualsToken */,
-        "**=": 60 /* AsteriskAsteriskEqualsToken */,
-        "/=": 61 /* SlashEqualsToken */,
-        "%=": 62 /* PercentEqualsToken */,
-        "<<=": 63 /* LessThanLessThanEqualsToken */,
-        ">>=": 64 /* GreaterThanGreaterThanEqualsToken */,
-        ">>>=": 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */,
-        "&=": 66 /* AmpersandEqualsToken */,
-        "|=": 67 /* BarEqualsToken */,
-        "^=": 68 /* CaretEqualsToken */,
-        "@": 55 /* AtToken */
-    };
-    /*
-        As per ECMAScript Language Specification 3th Edition, Section 7.6: Identifiers
-        IdentifierStart ::
-            Can contain Unicode 3.0.0  categories:
-            Uppercase letter (Lu),
-            Lowercase letter (Ll),
-            Titlecase letter (Lt),
-            Modifier letter (Lm),
-            Other letter (Lo), or
-            Letter number (Nl).
-        IdentifierPart :: =
-            Can contain IdentifierStart + Unicode 3.0.0  categories:
-            Non-spacing mark (Mn),
-            Combining spacing mark (Mc),
-            Decimal number (Nd), or
-            Connector punctuation (Pc).
-
-        Codepoint ranges for ES3 Identifiers are extracted from the Unicode 3.0.0 specification at:
-        http://www.unicode.org/Public/3.0-Update/UnicodeData-3.0.0.txt
-    */
-    var unicodeES3IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1610, 1649, 1747, 1749, 1749, 1765, 1766, 1786, 1788, 1808, 1808, 1810, 1836, 1920, 1957, 2309, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2784, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3294, 3294, 3296, 3297, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3424, 3425, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3805, 3840, 3840, 3904, 3911, 3913, 3946, 3976, 3979, 4096, 4129, 4131, 4135, 4137, 4138, 4176, 4181, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6067, 6176, 6263, 6272, 6312, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8319, 8319, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12346, 12353, 12436, 12445, 12446, 12449, 12538, 12540, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65138, 65140, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    var unicodeES3IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 768, 846, 864, 866, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1155, 1158, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1441, 1443, 1465, 1467, 1469, 1471, 1471, 1473, 1474, 1476, 1476, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1621, 1632, 1641, 1648, 1747, 1749, 1756, 1759, 1768, 1770, 1773, 1776, 1788, 1808, 1836, 1840, 1866, 1920, 1968, 2305, 2307, 2309, 2361, 2364, 2381, 2384, 2388, 2392, 2403, 2406, 2415, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2492, 2494, 2500, 2503, 2504, 2507, 2509, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2562, 2562, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2649, 2652, 2654, 2654, 2662, 2676, 2689, 2691, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2784, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2876, 2883, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2913, 2918, 2927, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3031, 3031, 3047, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3134, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3168, 3169, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3262, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3297, 3302, 3311, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3390, 3395, 3398, 3400, 3402, 3405, 3415, 3415, 3424, 3425, 3430, 3439, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3805, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3946, 3953, 3972, 3974, 3979, 3984, 3991, 3993, 4028, 4038, 4038, 4096, 4129, 4131, 4135, 4137, 4138, 4140, 4146, 4150, 4153, 4160, 4169, 4176, 4185, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 4969, 4977, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6099, 6112, 6121, 6160, 6169, 6176, 6263, 6272, 6313, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8255, 8256, 8319, 8319, 8400, 8412, 8417, 8417, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12346, 12353, 12436, 12441, 12442, 12445, 12446, 12449, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65056, 65059, 65075, 65076, 65101, 65103, 65136, 65138, 65140, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65381, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    /*
-        As per ECMAScript Language Specification 5th Edition, Section 7.6: ISyntaxToken Names and Identifiers
-        IdentifierStart ::
-            Can contain Unicode 6.2  categories:
-            Uppercase letter (Lu),
-            Lowercase letter (Ll),
-            Titlecase letter (Lt),
-            Modifier letter (Lm),
-            Other letter (Lo), or
-            Letter number (Nl).
-        IdentifierPart ::
-            Can contain IdentifierStart + Unicode 6.2  categories:
-            Non-spacing mark (Mn),
-            Combining spacing mark (Mc),
-            Decimal number (Nd),
-            Connector punctuation (Pc),
-            <ZWNJ>, or
-            <ZWJ>.
-
-        Codepoint ranges for ES5 Identifiers are extracted from the Unicode 6.2 specification at:
-        http://www.unicode.org/Public/6.2.0/ucd/UnicodeData.txt
-    */
-    var unicodeES5IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389, 6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688, 6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141, 7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015, 43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259, 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520, 43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695, 43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739, 43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    var unicodeES5IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520, 1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788, 1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112, 2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423, 2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929, 2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424, 3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272, 6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
-    function lookupInUnicodeMap(code, map) {
-        // Bail out quickly if it couldn't possibly be in the map.
-        if (code < map[0]) {
-            return false;
-        }
-        // Perform binary search in one of the Unicode range maps
-        var lo = 0;
-        var hi = map.length;
-        var mid;
-        while (lo + 1 < hi) {
-            mid = lo + (hi - lo) / 2;
-            // mid has to be even to catch a range's beginning
-            mid -= mid % 2;
-            if (map[mid] <= code && code <= map[mid + 1]) {
-                return true;
-            }
-            if (code < map[mid]) {
-                hi = mid;
-            }
-            else {
-                lo = mid + 2;
-            }
-        }
-        return false;
-    }
-    /* @internal */ function isUnicodeIdentifierStart(code, languageVersion) {
-        return languageVersion >= 1 /* ES5 */ ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
-    }
-    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
-    function isUnicodeIdentifierPart(code, languageVersion) {
-        return languageVersion >= 1 /* ES5 */ ?
-            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
-            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
-    }
-    function makeReverseMap(source) {
-        var result = [];
-        for (var name_4 in source) {
-            if (source.hasOwnProperty(name_4)) {
-                result[source[name_4]] = name_4;
-            }
-        }
-        return result;
-    }
-    var tokenStrings = makeReverseMap(textToToken);
-    function tokenToString(t) {
-        return tokenStrings[t];
-    }
-    ts.tokenToString = tokenToString;
-    /* @internal */
-    function stringToToken(s) {
-        return textToToken[s];
-    }
-    ts.stringToToken = stringToToken;
-    /* @internal */
-    function computeLineStarts(text) {
-        var result = new Array();
-        var pos = 0;
-        var lineStart = 0;
-        while (pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                case 10 /* lineFeed */:
-                    result.push(lineStart);
-                    lineStart = pos;
-                    break;
-                default:
-                    if (ch > 127 /* maxAsciiCharacter */ && isLineBreak(ch)) {
-                        result.push(lineStart);
-                        lineStart = pos;
-                    }
-                    break;
-            }
-        }
-        result.push(lineStart);
-        return result;
-    }
-    ts.computeLineStarts = computeLineStarts;
-    function getPositionOfLineAndCharacter(sourceFile, line, character) {
-        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
-    }
-    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
-    /* @internal */
-    function computePositionOfLineAndCharacter(lineStarts, line, character) {
-        ts.Debug.assert(line >= 0 && line < lineStarts.length);
-        return lineStarts[line] + character;
-    }
-    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
-    /* @internal */
-    function getLineStarts(sourceFile) {
-        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
-    }
-    ts.getLineStarts = getLineStarts;
-    /* @internal */
-    /**
-     * We assume the first line starts at position 0 and 'position' is non-negative.
-     */
-    function computeLineAndCharacterOfPosition(lineStarts, position) {
-        var lineNumber = ts.binarySearch(lineStarts, position);
-        if (lineNumber < 0) {
-            // If the actual position was not found,
-            // the binary search returns the 2's-complement of the next line start
-            // e.g. if the line starts at [5, 10, 23, 80] and the position requested was 20
-            // then the search will return -2.
-            //
-            // We want the index of the previous line start, so we subtract 1.
-            // Review 2's-complement if this is confusing.
-            lineNumber = ~lineNumber - 1;
-            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
-        }
-        return {
-            line: lineNumber,
-            character: position - lineStarts[lineNumber]
-        };
-    }
-    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
-    function getLineAndCharacterOfPosition(sourceFile, position) {
-        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
-    }
-    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
-    var hasOwnProperty = Object.prototype.hasOwnProperty;
-    function isWhiteSpace(ch) {
-        // Note: nextLine is in the Zs space, and should be considered to be a whitespace.
-        // It is explicitly not a line-break as it isn't in the exact set specified by EcmaScript.
-        return ch === 32 /* space */ ||
-            ch === 9 /* tab */ ||
-            ch === 11 /* verticalTab */ ||
-            ch === 12 /* formFeed */ ||
-            ch === 160 /* nonBreakingSpace */ ||
-            ch === 133 /* nextLine */ ||
-            ch === 5760 /* ogham */ ||
-            ch >= 8192 /* enQuad */ && ch <= 8203 /* zeroWidthSpace */ ||
-            ch === 8239 /* narrowNoBreakSpace */ ||
-            ch === 8287 /* mathematicalSpace */ ||
-            ch === 12288 /* ideographicSpace */ ||
-            ch === 65279 /* byteOrderMark */;
-    }
-    ts.isWhiteSpace = isWhiteSpace;
-    function isLineBreak(ch) {
-        // ES5 7.3:
-        // The ECMAScript line terminator characters are listed in Table 3.
-        //     Table 3: Line Terminator Characters
-        //     Code Unit Value     Name                    Formal Name
-        //     \u000A              Line Feed               <LF>
-        //     \u000D              Carriage Return         <CR>
-        //     \u2028              Line separator          <LS>
-        //     \u2029              Paragraph separator     <PS>
-        // Only the characters in Table 3 are treated as line terminators. Other new line or line
-        // breaking characters are treated as white space but not as line terminators.
-        return ch === 10 /* lineFeed */ ||
-            ch === 13 /* carriageReturn */ ||
-            ch === 8232 /* lineSeparator */ ||
-            ch === 8233 /* paragraphSeparator */;
-    }
-    ts.isLineBreak = isLineBreak;
-    function isDigit(ch) {
-        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
-    }
-    /* @internal */
-    function isOctalDigit(ch) {
-        return ch >= 48 /* _0 */ && ch <= 55 /* _7 */;
-    }
-    ts.isOctalDigit = isOctalDigit;
-    function couldStartTrivia(text, pos) {
-        // Keep in sync with skipTrivia
-        var ch = text.charCodeAt(pos);
-        switch (ch) {
-            case 13 /* carriageReturn */:
-            case 10 /* lineFeed */:
-            case 9 /* tab */:
-            case 11 /* verticalTab */:
-            case 12 /* formFeed */:
-            case 32 /* space */:
-            case 47 /* slash */:
-            // starts of normal trivia
-            case 60 /* lessThan */:
-            case 61 /* equals */:
-            case 62 /* greaterThan */:
-                // Starts of conflict marker trivia
-                return true;
-            case 35 /* hash */:
-                // Only if its the beginning can we have #! trivia
-                return pos === 0;
-            default:
-                return ch > 127 /* maxAsciiCharacter */;
-        }
-    }
-    ts.couldStartTrivia = couldStartTrivia;
-    /* @internal */
-    function skipTrivia(text, pos, stopAfterLineBreak) {
-        // Using ! with a greater than test is a fast way of testing the following conditions:
-        //  pos === undefined || pos === null || isNaN(pos) || pos < 0;
-        if (!(pos >= 0)) {
-            return pos;
-        }
-        // Keep in sync with couldStartTrivia
-        while (true) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                case 10 /* lineFeed */:
-                    pos++;
-                    if (stopAfterLineBreak) {
-                        return pos;
-                    }
-                    continue;
-                case 9 /* tab */:
-                case 11 /* verticalTab */:
-                case 12 /* formFeed */:
-                case 32 /* space */:
-                    pos++;
-                    continue;
-                case 47 /* slash */:
-                    if (text.charCodeAt(pos + 1) === 47 /* slash */) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (isLineBreak(text.charCodeAt(pos))) {
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
-                        pos += 2;
-                        while (pos < text.length) {
-                            if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
-                                pos += 2;
-                                break;
-                            }
-                            pos++;
-                        }
-                        continue;
-                    }
-                    break;
-                case 60 /* lessThan */:
-                case 61 /* equals */:
-                case 62 /* greaterThan */:
-                    if (isConflictMarkerTrivia(text, pos)) {
-                        pos = scanConflictMarkerTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                case 35 /* hash */:
-                    if (pos === 0 && isShebangTrivia(text, pos)) {
-                        pos = scanShebangTrivia(text, pos);
-                        continue;
-                    }
-                    break;
-                default:
-                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpace(ch) || isLineBreak(ch))) {
-                        pos++;
-                        continue;
-                    }
-                    break;
-            }
-            return pos;
-        }
-    }
-    ts.skipTrivia = skipTrivia;
-    // All conflict markers consist of the same character repeated seven times.  If it is
-    // a <<<<<<< or >>>>>>> marker then it is also followed by a space.
-    var mergeConflictMarkerLength = "<<<<<<<".length;
-    function isConflictMarkerTrivia(text, pos) {
-        ts.Debug.assert(pos >= 0);
-        // Conflict markers must be at the start of a line.
-        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
-            var ch = text.charCodeAt(pos);
-            if ((pos + mergeConflictMarkerLength) < text.length) {
-                for (var i = 0, n = mergeConflictMarkerLength; i < n; i++) {
-                    if (text.charCodeAt(pos + i) !== ch) {
-                        return false;
-                    }
-                }
-                return ch === 61 /* equals */ ||
-                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32 /* space */;
-            }
-        }
-        return false;
-    }
-    function scanConflictMarkerTrivia(text, pos, error) {
-        if (error) {
-            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
-        }
-        var ch = text.charCodeAt(pos);
-        var len = text.length;
-        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
-            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
-                pos++;
-            }
-        }
-        else {
-            ts.Debug.assert(ch === 61 /* equals */);
-            // Consume everything from the start of the mid-conflict marker to the start of the next
-            // end-conflict marker.
-            while (pos < len) {
-                var ch_1 = text.charCodeAt(pos);
-                if (ch_1 === 62 /* greaterThan */ && isConflictMarkerTrivia(text, pos)) {
-                    break;
-                }
-                pos++;
-            }
-        }
-        return pos;
-    }
-    var shebangTriviaRegex = /^#!.*/;
-    function isShebangTrivia(text, pos) {
-        // Shebangs check must only be done at the start of the file
-        ts.Debug.assert(pos === 0);
-        return shebangTriviaRegex.test(text);
-    }
-    function scanShebangTrivia(text, pos) {
-        var shebang = shebangTriviaRegex.exec(text)[0];
-        pos = pos + shebang.length;
-        return pos;
-    }
-    /**
-     * Extract comments from text prefixing the token closest following `pos`.
-     * The return value is an array containing a TextRange for each comment.
-     * Single-line comment ranges include the beginning '//' characters but not the ending line break.
-     * Multi - line comment ranges include the beginning '/* and ending '<asterisk>/' characters.
-     * The return value is undefined if no comments were found.
-     * @param trailing
-     * If false, whitespace is skipped until the first line break and comments between that location
-     * and the next token are returned.
-     * If true, comments occurring between the given position and the next line break are returned.
-     */
-    function getCommentRanges(text, pos, trailing) {
-        var result;
-        var collecting = trailing || pos === 0;
-        while (pos < text.length) {
-            var ch = text.charCodeAt(pos);
-            switch (ch) {
-                case 13 /* carriageReturn */:
-                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                case 10 /* lineFeed */:
-                    pos++;
-                    if (trailing) {
-                        return result;
-                    }
-                    collecting = true;
-                    if (result && result.length) {
-                        ts.lastOrUndefined(result).hasTrailingNewLine = true;
-                    }
-                    continue;
-                case 9 /* tab */:
-                case 11 /* verticalTab */:
-                case 12 /* formFeed */:
-                case 32 /* space */:
-                    pos++;
-                    continue;
-                case 47 /* slash */:
-                    var nextChar = text.charCodeAt(pos + 1);
-                    var hasTrailingNewLine = false;
-                    if (nextChar === 47 /* slash */ || nextChar === 42 /* asterisk */) {
-                        var kind = nextChar === 47 /* slash */ ? 2 /* SingleLineCommentTrivia */ : 3 /* MultiLineCommentTrivia */;
-                        var startPos = pos;
-                        pos += 2;
-                        if (nextChar === 47 /* slash */) {
-                            while (pos < text.length) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    hasTrailingNewLine = true;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        else {
-                            while (pos < text.length) {
-                                if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
-                                    pos += 2;
-                                    break;
-                                }
-                                pos++;
-                            }
-                        }
-                        if (collecting) {
-                            if (!result) {
-                                result = [];
-                            }
-                            result.push({ pos: startPos, end: pos, hasTrailingNewLine: hasTrailingNewLine, kind: kind });
-                        }
-                        continue;
-                    }
-                    break;
-                default:
-                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpace(ch) || isLineBreak(ch))) {
-                        if (result && result.length && isLineBreak(ch)) {
-                            ts.lastOrUndefined(result).hasTrailingNewLine = true;
-                        }
-                        pos++;
-                        continue;
-                    }
-                    break;
-            }
-            return result;
-        }
-        return result;
-    }
-    function getLeadingCommentRanges(text, pos) {
-        return getCommentRanges(text, pos, /*trailing*/ false);
-    }
-    ts.getLeadingCommentRanges = getLeadingCommentRanges;
-    function getTrailingCommentRanges(text, pos) {
-        return getCommentRanges(text, pos, /*trailing*/ true);
-    }
-    ts.getTrailingCommentRanges = getTrailingCommentRanges;
-    /** Optionally, get the shebang */
-    function getShebang(text) {
-        return shebangTriviaRegex.test(text)
-            ? shebangTriviaRegex.exec(text)[0]
-            : undefined;
-    }
-    ts.getShebang = getShebang;
-    function isIdentifierStart(ch, languageVersion) {
-        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
-            ch === 36 /* $ */ || ch === 95 /* _ */ ||
-            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierStart(ch, languageVersion);
-    }
-    ts.isIdentifierStart = isIdentifierStart;
-    function isIdentifierPart(ch, languageVersion) {
-        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
-            ch >= 48 /* _0 */ && ch <= 57 /* _9 */ || ch === 36 /* $ */ || ch === 95 /* _ */ ||
-            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierPart(ch, languageVersion);
-    }
-    ts.isIdentifierPart = isIdentifierPart;
-    /* @internal */
-    function isIdentifier(name, languageVersion) {
-        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
-            return false;
-        }
-        for (var i = 1, n = name.length; i < n; i++) {
-            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.isIdentifier = isIdentifier;
-    // Creates a scanner over a (possibly unspecified) range of a piece of text.
-    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
-        if (languageVariant === void 0) { languageVariant = 0 /* Standard */; }
-        // Current position (end position of text of current token)
-        var pos;
-        // end of text
-        var end;
-        // Start position of whitespace before current token
-        var startPos;
-        // Start position of text of current token
-        var tokenPos;
-        var token;
-        var tokenValue;
-        var precedingLineBreak;
-        var hasExtendedUnicodeEscape;
-        var tokenIsUnterminated;
-        setText(text, start, length);
-        return {
-            getStartPos: function () { return startPos; },
-            getTextPos: function () { return pos; },
-            getToken: function () { return token; },
-            getTokenPos: function () { return tokenPos; },
-            getTokenText: function () { return text.substring(tokenPos, pos); },
-            getTokenValue: function () { return tokenValue; },
-            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
-            hasPrecedingLineBreak: function () { return precedingLineBreak; },
-            isIdentifier: function () { return token === 69 /* Identifier */ || token > 105 /* LastReservedWord */; },
-            isReservedWord: function () { return token >= 70 /* FirstReservedWord */ && token <= 105 /* LastReservedWord */; },
-            isUnterminated: function () { return tokenIsUnterminated; },
-            reScanGreaterToken: reScanGreaterToken,
-            reScanSlashToken: reScanSlashToken,
-            reScanTemplateToken: reScanTemplateToken,
-            scanJsxIdentifier: scanJsxIdentifier,
-            reScanJsxToken: reScanJsxToken,
-            scanJsxToken: scanJsxToken,
-            scanJSDocToken: scanJSDocToken,
-            scan: scan,
-            setText: setText,
-            setScriptTarget: setScriptTarget,
-            setLanguageVariant: setLanguageVariant,
-            setOnError: setOnError,
-            setTextPos: setTextPos,
-            tryScan: tryScan,
-            lookAhead: lookAhead,
-            scanRange: scanRange
-        };
-        function error(message, length) {
-            if (onError) {
-                onError(message, length || 0);
-            }
-        }
-        function scanNumber() {
-            var start = pos;
-            while (isDigit(text.charCodeAt(pos)))
-                pos++;
-            if (text.charCodeAt(pos) === 46 /* dot */) {
-                pos++;
-                while (isDigit(text.charCodeAt(pos)))
-                    pos++;
-            }
-            var end = pos;
-            if (text.charCodeAt(pos) === 69 /* E */ || text.charCodeAt(pos) === 101 /* e */) {
-                pos++;
-                if (text.charCodeAt(pos) === 43 /* plus */ || text.charCodeAt(pos) === 45 /* minus */)
-                    pos++;
-                if (isDigit(text.charCodeAt(pos))) {
-                    pos++;
-                    while (isDigit(text.charCodeAt(pos)))
-                        pos++;
-                    end = pos;
-                }
-                else {
-                    error(ts.Diagnostics.Digit_expected);
-                }
-            }
-            return "" + +(text.substring(start, end));
-        }
-        function scanOctalDigits() {
-            var start = pos;
-            while (isOctalDigit(text.charCodeAt(pos))) {
-                pos++;
-            }
-            return +(text.substring(start, pos));
-        }
-        /**
-         * Scans the given number of hexadecimal digits in the text,
-         * returning -1 if the given number is unavailable.
-         */
-        function scanExactNumberOfHexDigits(count) {
-            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ false);
-        }
-        /**
-         * Scans as many hexadecimal digits as are available in the text,
-         * returning -1 if the given number of digits was unavailable.
-         */
-        function scanMinimumNumberOfHexDigits(count) {
-            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ true);
-        }
-        function scanHexDigits(minCount, scanAsManyAsPossible) {
-            var digits = 0;
-            var value = 0;
-            while (digits < minCount || scanAsManyAsPossible) {
-                var ch = text.charCodeAt(pos);
-                if (ch >= 48 /* _0 */ && ch <= 57 /* _9 */) {
-                    value = value * 16 + ch - 48 /* _0 */;
-                }
-                else if (ch >= 65 /* A */ && ch <= 70 /* F */) {
-                    value = value * 16 + ch - 65 /* A */ + 10;
-                }
-                else if (ch >= 97 /* a */ && ch <= 102 /* f */) {
-                    value = value * 16 + ch - 97 /* a */ + 10;
-                }
-                else {
-                    break;
-                }
-                pos++;
-                digits++;
-            }
-            if (digits < minCount) {
-                value = -1;
-            }
-            return value;
-        }
-        function scanString() {
-            var quote = text.charCodeAt(pos);
-            pos++;
-            var result = "";
-            var start = pos;
-            while (true) {
-                if (pos >= end) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
-                }
-                var ch = text.charCodeAt(pos);
-                if (ch === quote) {
-                    result += text.substring(start, pos);
-                    pos++;
-                    break;
-                }
-                if (ch === 92 /* backslash */) {
-                    result += text.substring(start, pos);
-                    result += scanEscapeSequence();
-                    start = pos;
-                    continue;
-                }
-                if (isLineBreak(ch)) {
-                    result += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_string_literal);
-                    break;
-                }
-                pos++;
-            }
-            return result;
-        }
-        /**
-         * Sets the current 'tokenValue' and returns a NoSubstitutionTemplateLiteral or
-         * a literal component of a TemplateExpression.
-         */
-        function scanTemplateAndSetTokenValue() {
-            var startedWithBacktick = text.charCodeAt(pos) === 96 /* backtick */;
-            pos++;
-            var start = pos;
-            var contents = "";
-            var resultingToken;
-            while (true) {
-                if (pos >= end) {
-                    contents += text.substring(start, pos);
-                    tokenIsUnterminated = true;
-                    error(ts.Diagnostics.Unterminated_template_literal);
-                    resultingToken = startedWithBacktick ? 11 /* NoSubstitutionTemplateLiteral */ : 14 /* TemplateTail */;
-                    break;
-                }
-                var currChar = text.charCodeAt(pos);
-                // '`'
-                if (currChar === 96 /* backtick */) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    resultingToken = startedWithBacktick ? 11 /* NoSubstitutionTemplateLiteral */ : 14 /* TemplateTail */;
-                    break;
-                }
-                // '${'
-                if (currChar === 36 /* $ */ && pos + 1 < end && text.charCodeAt(pos + 1) === 123 /* openBrace */) {
-                    contents += text.substring(start, pos);
-                    pos += 2;
-                    resultingToken = startedWithBacktick ? 12 /* TemplateHead */ : 13 /* TemplateMiddle */;
-                    break;
-                }
-                // Escape character
-                if (currChar === 92 /* backslash */) {
-                    contents += text.substring(start, pos);
-                    contents += scanEscapeSequence();
-                    start = pos;
-                    continue;
-                }
-                // Speculated ECMAScript 6 Spec 11.8.6.1:
-                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for Template Values
-                if (currChar === 13 /* carriageReturn */) {
-                    contents += text.substring(start, pos);
-                    pos++;
-                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                    contents += "\n";
-                    start = pos;
-                    continue;
-                }
-                pos++;
-            }
-            ts.Debug.assert(resultingToken !== undefined);
-            tokenValue = contents;
-            return resultingToken;
-        }
-        function scanEscapeSequence() {
-            pos++;
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                return "";
-            }
-            var ch = text.charCodeAt(pos);
-            pos++;
-            switch (ch) {
-                case 48 /* _0 */:
-                    return "\0";
-                case 98 /* b */:
-                    return "\b";
-                case 116 /* t */:
-                    return "\t";
-                case 110 /* n */:
-                    return "\n";
-                case 118 /* v */:
-                    return "\v";
-                case 102 /* f */:
-                    return "\f";
-                case 114 /* r */:
-                    return "\r";
-                case 39 /* singleQuote */:
-                    return "\'";
-                case 34 /* doubleQuote */:
-                    return "\"";
-                case 117 /* u */:
-                    // '\u{DDDDDDDD}'
-                    if (pos < end && text.charCodeAt(pos) === 123 /* openBrace */) {
-                        hasExtendedUnicodeEscape = true;
-                        pos++;
-                        return scanExtendedUnicodeEscape();
-                    }
-                    // '\uDDDD'
-                    return scanHexadecimalEscape(/*numDigits*/ 4);
-                case 120 /* x */:
-                    // '\xDD'
-                    return scanHexadecimalEscape(/*numDigits*/ 2);
-                // when encountering a LineContinuation (i.e. a backslash and a line terminator sequence),
-                // the line terminator is interpreted to be "the empty code unit sequence".
-                case 13 /* carriageReturn */:
-                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
-                        pos++;
-                    }
-                // fall through
-                case 10 /* lineFeed */:
-                case 8232 /* lineSeparator */:
-                case 8233 /* paragraphSeparator */:
-                    return "";
-                default:
-                    return String.fromCharCode(ch);
-            }
-        }
-        function scanHexadecimalEscape(numDigits) {
-            var escapedValue = scanExactNumberOfHexDigits(numDigits);
-            if (escapedValue >= 0) {
-                return String.fromCharCode(escapedValue);
-            }
-            else {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                return "";
-            }
-        }
-        function scanExtendedUnicodeEscape() {
-            var escapedValue = scanMinimumNumberOfHexDigits(1);
-            var isInvalidExtendedEscape = false;
-            // Validate the value of the digit
-            if (escapedValue < 0) {
-                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                isInvalidExtendedEscape = true;
-            }
-            else if (escapedValue > 0x10FFFF) {
-                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
-                isInvalidExtendedEscape = true;
-            }
-            if (pos >= end) {
-                error(ts.Diagnostics.Unexpected_end_of_text);
-                isInvalidExtendedEscape = true;
-            }
-            else if (text.charCodeAt(pos) === 125 /* closeBrace */) {
-                // Only swallow the following character up if it's a '}'.
-                pos++;
-            }
-            else {
-                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
-                isInvalidExtendedEscape = true;
-            }
-            if (isInvalidExtendedEscape) {
-                return "";
-            }
-            return utf16EncodeAsString(escapedValue);
-        }
-        // Derived from the 10.1.1 UTF16Encoding of the ES6 Spec.
-        function utf16EncodeAsString(codePoint) {
-            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
-            if (codePoint <= 65535) {
-                return String.fromCharCode(codePoint);
-            }
-            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
-            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
-            return String.fromCharCode(codeUnit1, codeUnit2);
-        }
-        // Current character is known to be a backslash. Check for Unicode escape of the form '\uXXXX'
-        // and return code point value if valid Unicode escape is found. Otherwise return -1.
-        function peekUnicodeEscape() {
-            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117 /* u */) {
-                var start_1 = pos;
-                pos += 2;
-                var value = scanExactNumberOfHexDigits(4);
-                pos = start_1;
-                return value;
-            }
-            return -1;
-        }
-        function scanIdentifierParts() {
-            var result = "";
-            var start = pos;
-            while (pos < end) {
-                var ch = text.charCodeAt(pos);
-                if (isIdentifierPart(ch, languageVersion)) {
-                    pos++;
-                }
-                else if (ch === 92 /* backslash */) {
-                    ch = peekUnicodeEscape();
-                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
-                        break;
-                    }
-                    result += text.substring(start, pos);
-                    result += String.fromCharCode(ch);
-                    // Valid Unicode escape is always six characters
-                    pos += 6;
-                    start = pos;
-                }
-                else {
-                    break;
-                }
-            }
-            result += text.substring(start, pos);
-            return result;
-        }
-        function getIdentifierToken() {
-            // Reserved words are between 2 and 11 characters long and start with a lowercase letter
-            var len = tokenValue.length;
-            if (len >= 2 && len <= 11) {
-                var ch = tokenValue.charCodeAt(0);
-                if (ch >= 97 /* a */ && ch <= 122 /* z */ && hasOwnProperty.call(textToToken, tokenValue)) {
-                    return token = textToToken[tokenValue];
-                }
-            }
-            return token = 69 /* Identifier */;
-        }
-        function scanBinaryOrOctalDigits(base) {
-            ts.Debug.assert(base !== 2 || base !== 8, "Expected either base 2 or base 8");
-            var value = 0;
-            // For counting number of digits; Valid binaryIntegerLiteral must have at least one binary digit following B or b.
-            // Similarly valid octalIntegerLiteral must have at least one octal digit following o or O.
-            var numberOfDigits = 0;
-            while (true) {
-                var ch = text.charCodeAt(pos);
-                var valueOfCh = ch - 48 /* _0 */;
-                if (!isDigit(ch) || valueOfCh >= base) {
-                    break;
-                }
-                value = value * base + valueOfCh;
-                pos++;
-                numberOfDigits++;
-            }
-            // Invalid binaryIntegerLiteral or octalIntegerLiteral
-            if (numberOfDigits === 0) {
-                return -1;
-            }
-            return value;
-        }
-        function scan() {
-            startPos = pos;
-            hasExtendedUnicodeEscape = false;
-            precedingLineBreak = false;
-            tokenIsUnterminated = false;
-            while (true) {
-                tokenPos = pos;
-                if (pos >= end) {
-                    return token = 1 /* EndOfFileToken */;
-                }
-                var ch = text.charCodeAt(pos);
-                // Special handling for shebang
-                if (ch === 35 /* hash */ && pos === 0 && isShebangTrivia(text, pos)) {
-                    pos = scanShebangTrivia(text, pos);
-                    if (skipTrivia) {
-                        continue;
-                    }
-                    else {
-                        return token = 6 /* ShebangTrivia */;
-                    }
-                }
-                switch (ch) {
-                    case 10 /* lineFeed */:
-                    case 13 /* carriageReturn */:
-                        precedingLineBreak = true;
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            if (ch === 13 /* carriageReturn */ && pos + 1 < end && text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
-                                // consume both CR and LF
-                                pos += 2;
-                            }
-                            else {
-                                pos++;
-                            }
-                            return token = 4 /* NewLineTrivia */;
-                        }
-                    case 9 /* tab */:
-                    case 11 /* verticalTab */:
-                    case 12 /* formFeed */:
-                    case 32 /* space */:
-                        if (skipTrivia) {
-                            pos++;
-                            continue;
-                        }
-                        else {
-                            while (pos < end && isWhiteSpace(text.charCodeAt(pos))) {
-                                pos++;
-                            }
-                            return token = 5 /* WhitespaceTrivia */;
-                        }
-                    case 33 /* exclamation */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 33 /* ExclamationEqualsEqualsToken */;
-                            }
-                            return pos += 2, token = 31 /* ExclamationEqualsToken */;
-                        }
-                        pos++;
-                        return token = 49 /* ExclamationToken */;
-                    case 34 /* doubleQuote */:
-                    case 39 /* singleQuote */:
-                        tokenValue = scanString();
-                        return token = 9 /* StringLiteral */;
-                    case 96 /* backtick */:
-                        return token = scanTemplateAndSetTokenValue();
-                    case 37 /* percent */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 62 /* PercentEqualsToken */;
-                        }
-                        pos++;
-                        return token = 40 /* PercentToken */;
-                    case 38 /* ampersand */:
-                        if (text.charCodeAt(pos + 1) === 38 /* ampersand */) {
-                            return pos += 2, token = 51 /* AmpersandAmpersandToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 66 /* AmpersandEqualsToken */;
-                        }
-                        pos++;
-                        return token = 46 /* AmpersandToken */;
-                    case 40 /* openParen */:
-                        pos++;
-                        return token = 17 /* OpenParenToken */;
-                    case 41 /* closeParen */:
-                        pos++;
-                        return token = 18 /* CloseParenToken */;
-                    case 42 /* asterisk */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 59 /* AsteriskEqualsToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 60 /* AsteriskAsteriskEqualsToken */;
-                            }
-                            return pos += 2, token = 38 /* AsteriskAsteriskToken */;
-                        }
-                        pos++;
-                        return token = 37 /* AsteriskToken */;
-                    case 43 /* plus */:
-                        if (text.charCodeAt(pos + 1) === 43 /* plus */) {
-                            return pos += 2, token = 41 /* PlusPlusToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 57 /* PlusEqualsToken */;
-                        }
-                        pos++;
-                        return token = 35 /* PlusToken */;
-                    case 44 /* comma */:
-                        pos++;
-                        return token = 24 /* CommaToken */;
-                    case 45 /* minus */:
-                        if (text.charCodeAt(pos + 1) === 45 /* minus */) {
-                            return pos += 2, token = 42 /* MinusMinusToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 58 /* MinusEqualsToken */;
-                        }
-                        pos++;
-                        return token = 36 /* MinusToken */;
-                    case 46 /* dot */:
-                        if (isDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = scanNumber();
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 46 /* dot */ && text.charCodeAt(pos + 2) === 46 /* dot */) {
-                            return pos += 3, token = 22 /* DotDotDotToken */;
-                        }
-                        pos++;
-                        return token = 21 /* DotToken */;
-                    case 47 /* slash */:
-                        // Single-line comment
-                        if (text.charCodeAt(pos + 1) === 47 /* slash */) {
-                            pos += 2;
-                            while (pos < end) {
-                                if (isLineBreak(text.charCodeAt(pos))) {
-                                    break;
-                                }
-                                pos++;
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 2 /* SingleLineCommentTrivia */;
-                            }
-                        }
-                        // Multi-line comment
-                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
-                            pos += 2;
-                            var commentClosed = false;
-                            while (pos < end) {
-                                var ch_2 = text.charCodeAt(pos);
-                                if (ch_2 === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
-                                    pos += 2;
-                                    commentClosed = true;
-                                    break;
-                                }
-                                if (isLineBreak(ch_2)) {
-                                    precedingLineBreak = true;
-                                }
-                                pos++;
-                            }
-                            if (!commentClosed) {
-                                error(ts.Diagnostics.Asterisk_Slash_expected);
-                            }
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                tokenIsUnterminated = !commentClosed;
-                                return token = 3 /* MultiLineCommentTrivia */;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 61 /* SlashEqualsToken */;
-                        }
-                        pos++;
-                        return token = 39 /* SlashToken */;
-                    case 48 /* _0 */:
-                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 /* X */ || text.charCodeAt(pos + 1) === 120 /* x */)) {
-                            pos += 2;
-                            var value = scanMinimumNumberOfHexDigits(1);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Hexadecimal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 /* B */ || text.charCodeAt(pos + 1) === 98 /* b */)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(/* base */ 2);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Binary_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 /* O */ || text.charCodeAt(pos + 1) === 111 /* o */)) {
-                            pos += 2;
-                            var value = scanBinaryOrOctalDigits(/* base */ 8);
-                            if (value < 0) {
-                                error(ts.Diagnostics.Octal_digit_expected);
-                                value = 0;
-                            }
-                            tokenValue = "" + value;
-                            return token = 8 /* NumericLiteral */;
-                        }
-                        // Try to parse as an octal
-                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
-                            tokenValue = "" + scanOctalDigits();
-                            return token = 8 /* NumericLiteral */;
-                        }
-                    // This fall-through is a deviation from the EcmaScript grammar. The grammar says that a leading zero
-                    // can only be followed by an octal digit, a dot, or the end of the number literal. However, we are being
-                    // permissive and allowing decimal digits of the form 08* and 09* (which many browsers also do).
-                    case 49 /* _1 */:
-                    case 50 /* _2 */:
-                    case 51 /* _3 */:
-                    case 52 /* _4 */:
-                    case 53 /* _5 */:
-                    case 54 /* _6 */:
-                    case 55 /* _7 */:
-                    case 56 /* _8 */:
-                    case 57 /* _9 */:
-                        tokenValue = scanNumber();
-                        return token = 8 /* NumericLiteral */;
-                    case 58 /* colon */:
-                        pos++;
-                        return token = 54 /* ColonToken */;
-                    case 59 /* semicolon */:
-                        pos++;
-                        return token = 23 /* SemicolonToken */;
-                    case 60 /* lessThan */:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7 /* ConflictMarkerTrivia */;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 60 /* lessThan */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 63 /* LessThanLessThanEqualsToken */;
-                            }
-                            return pos += 2, token = 43 /* LessThanLessThanToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 28 /* LessThanEqualsToken */;
-                        }
-                        if (languageVariant === 1 /* JSX */ &&
-                            text.charCodeAt(pos + 1) === 47 /* slash */ &&
-                            text.charCodeAt(pos + 2) !== 42 /* asterisk */) {
-                            return pos += 2, token = 26 /* LessThanSlashToken */;
-                        }
-                        pos++;
-                        return token = 25 /* LessThanToken */;
-                    case 61 /* equals */:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7 /* ConflictMarkerTrivia */;
-                            }
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                                return pos += 3, token = 32 /* EqualsEqualsEqualsToken */;
-                            }
-                            return pos += 2, token = 30 /* EqualsEqualsToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
-                            return pos += 2, token = 34 /* EqualsGreaterThanToken */;
-                        }
-                        pos++;
-                        return token = 56 /* EqualsToken */;
-                    case 62 /* greaterThan */:
-                        if (isConflictMarkerTrivia(text, pos)) {
-                            pos = scanConflictMarkerTrivia(text, pos, error);
-                            if (skipTrivia) {
-                                continue;
-                            }
-                            else {
-                                return token = 7 /* ConflictMarkerTrivia */;
-                            }
-                        }
-                        pos++;
-                        return token = 27 /* GreaterThanToken */;
-                    case 63 /* question */:
-                        pos++;
-                        return token = 53 /* QuestionToken */;
-                    case 91 /* openBracket */:
-                        pos++;
-                        return token = 19 /* OpenBracketToken */;
-                    case 93 /* closeBracket */:
-                        pos++;
-                        return token = 20 /* CloseBracketToken */;
-                    case 94 /* caret */:
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 68 /* CaretEqualsToken */;
-                        }
-                        pos++;
-                        return token = 48 /* CaretToken */;
-                    case 123 /* openBrace */:
-                        pos++;
-                        return token = 15 /* OpenBraceToken */;
-                    case 124 /* bar */:
-                        if (text.charCodeAt(pos + 1) === 124 /* bar */) {
-                            return pos += 2, token = 52 /* BarBarToken */;
-                        }
-                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                            return pos += 2, token = 67 /* BarEqualsToken */;
-                        }
-                        pos++;
-                        return token = 47 /* BarToken */;
-                    case 125 /* closeBrace */:
-                        pos++;
-                        return token = 16 /* CloseBraceToken */;
-                    case 126 /* tilde */:
-                        pos++;
-                        return token = 50 /* TildeToken */;
-                    case 64 /* at */:
-                        pos++;
-                        return token = 55 /* AtToken */;
-                    case 92 /* backslash */:
-                        var cookedChar = peekUnicodeEscape();
-                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
-                            pos += 6;
-                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
-                            return token = getIdentifierToken();
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0 /* Unknown */;
-                    default:
-                        if (isIdentifierStart(ch, languageVersion)) {
-                            pos++;
-                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
-                                pos++;
-                            tokenValue = text.substring(tokenPos, pos);
-                            if (ch === 92 /* backslash */) {
-                                tokenValue += scanIdentifierParts();
-                            }
-                            return token = getIdentifierToken();
-                        }
-                        else if (isWhiteSpace(ch)) {
-                            pos++;
-                            continue;
-                        }
-                        else if (isLineBreak(ch)) {
-                            precedingLineBreak = true;
-                            pos++;
-                            continue;
-                        }
-                        error(ts.Diagnostics.Invalid_character);
-                        pos++;
-                        return token = 0 /* Unknown */;
-                }
-            }
-        }
-        function reScanGreaterToken() {
-            if (token === 27 /* GreaterThanToken */) {
-                if (text.charCodeAt(pos) === 62 /* greaterThan */) {
-                    if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
-                        if (text.charCodeAt(pos + 2) === 61 /* equals */) {
-                            return pos += 3, token = 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */;
-                        }
-                        return pos += 2, token = 45 /* GreaterThanGreaterThanGreaterThanToken */;
-                    }
-                    if (text.charCodeAt(pos + 1) === 61 /* equals */) {
-                        return pos += 2, token = 64 /* GreaterThanGreaterThanEqualsToken */;
-                    }
-                    pos++;
-                    return token = 44 /* GreaterThanGreaterThanToken */;
-                }
-                if (text.charCodeAt(pos) === 61 /* equals */) {
-                    pos++;
-                    return token = 29 /* GreaterThanEqualsToken */;
-                }
-            }
-            return token;
-        }
-        function reScanSlashToken() {
-            if (token === 39 /* SlashToken */ || token === 61 /* SlashEqualsToken */) {
-                var p = tokenPos + 1;
-                var inEscape = false;
-                var inCharacterClass = false;
-                while (true) {
-                    // If we reach the end of a file, or hit a newline, then this is an unterminated
-                    // regex.  Report error and return what we have so far.
-                    if (p >= end) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    var ch = text.charCodeAt(p);
-                    if (isLineBreak(ch)) {
-                        tokenIsUnterminated = true;
-                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
-                        break;
-                    }
-                    if (inEscape) {
-                        // Parsing an escape character;
-                        // reset the flag and just advance to the next char.
-                        inEscape = false;
-                    }
-                    else if (ch === 47 /* slash */ && !inCharacterClass) {
-                        // A slash within a character class is permissible,
-                        // but in general it signals the end of the regexp literal.
-                        p++;
-                        break;
-                    }
-                    else if (ch === 91 /* openBracket */) {
-                        inCharacterClass = true;
-                    }
-                    else if (ch === 92 /* backslash */) {
-                        inEscape = true;
-                    }
-                    else if (ch === 93 /* closeBracket */) {
-                        inCharacterClass = false;
-                    }
-                    p++;
-                }
-                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
-                    p++;
-                }
-                pos = p;
-                tokenValue = text.substring(tokenPos, pos);
-                token = 10 /* RegularExpressionLiteral */;
-            }
-            return token;
-        }
-        /**
-         * Unconditionally back up and scan a template expression portion.
-         */
-        function reScanTemplateToken() {
-            ts.Debug.assert(token === 16 /* CloseBraceToken */, "'reScanTemplateToken' should only be called on a '}'");
-            pos = tokenPos;
-            return token = scanTemplateAndSetTokenValue();
-        }
-        function reScanJsxToken() {
-            pos = tokenPos = startPos;
-            return token = scanJsxToken();
-        }
-        function scanJsxToken() {
-            startPos = tokenPos = pos;
-            if (pos >= end) {
-                return token = 1 /* EndOfFileToken */;
-            }
-            var char = text.charCodeAt(pos);
-            if (char === 60 /* lessThan */) {
-                if (text.charCodeAt(pos + 1) === 47 /* slash */) {
-                    pos += 2;
-                    return token = 26 /* LessThanSlashToken */;
-                }
-                pos++;
-                return token = 25 /* LessThanToken */;
-            }
-            if (char === 123 /* openBrace */) {
-                pos++;
-                return token = 15 /* OpenBraceToken */;
-            }
-            while (pos < end) {
-                pos++;
-                char = text.charCodeAt(pos);
-                if ((char === 123 /* openBrace */) || (char === 60 /* lessThan */)) {
-                    break;
-                }
-            }
-            return token = 244 /* JsxText */;
-        }
-        // Scans a JSX identifier; these differ from normal identifiers in that
-        // they allow dashes
-        function scanJsxIdentifier() {
-            if (tokenIsIdentifierOrKeyword(token)) {
-                var firstCharPosition = pos;
-                while (pos < end) {
-                    var ch = text.charCodeAt(pos);
-                    if (ch === 45 /* minus */ || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
-                        pos++;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
-            }
-            return token;
-        }
-        function scanJSDocToken() {
-            if (pos >= end) {
-                return token = 1 /* EndOfFileToken */;
-            }
-            startPos = pos;
-            // Eat leading whitespace
-            var ch = text.charCodeAt(pos);
-            while (pos < end) {
-                ch = text.charCodeAt(pos);
-                if (isWhiteSpace(ch)) {
-                    pos++;
-                }
-                else {
-                    break;
-                }
-            }
-            tokenPos = pos;
-            switch (ch) {
-                case 64 /* at */:
-                    return pos += 1, token = 55 /* AtToken */;
-                case 10 /* lineFeed */:
-                case 13 /* carriageReturn */:
-                    return pos += 1, token = 4 /* NewLineTrivia */;
-                case 42 /* asterisk */:
-                    return pos += 1, token = 37 /* AsteriskToken */;
-                case 123 /* openBrace */:
-                    return pos += 1, token = 15 /* OpenBraceToken */;
-                case 125 /* closeBrace */:
-                    return pos += 1, token = 16 /* CloseBraceToken */;
-                case 91 /* openBracket */:
-                    return pos += 1, token = 19 /* OpenBracketToken */;
-                case 93 /* closeBracket */:
-                    return pos += 1, token = 20 /* CloseBracketToken */;
-                case 61 /* equals */:
-                    return pos += 1, token = 56 /* EqualsToken */;
-                case 44 /* comma */:
-                    return pos += 1, token = 24 /* CommaToken */;
-            }
-            if (isIdentifierStart(ch, 2 /* Latest */)) {
-                pos++;
-                while (isIdentifierPart(text.charCodeAt(pos), 2 /* Latest */) && pos < end) {
-                    pos++;
-                }
-                return token = 69 /* Identifier */;
-            }
-            else {
-                return pos += 1, token = 0 /* Unknown */;
-            }
-        }
-        function speculationHelper(callback, isLookahead) {
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var saveTokenValue = tokenValue;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var result = callback();
-            // If our callback returned something 'falsy' or we're just looking ahead,
-            // then unconditionally restore us to where we were.
-            if (!result || isLookahead) {
-                pos = savePos;
-                startPos = saveStartPos;
-                tokenPos = saveTokenPos;
-                token = saveToken;
-                tokenValue = saveTokenValue;
-                precedingLineBreak = savePrecedingLineBreak;
-            }
-            return result;
-        }
-        function scanRange(start, length, callback) {
-            var saveEnd = end;
-            var savePos = pos;
-            var saveStartPos = startPos;
-            var saveTokenPos = tokenPos;
-            var saveToken = token;
-            var savePrecedingLineBreak = precedingLineBreak;
-            var saveTokenValue = tokenValue;
-            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
-            var saveTokenIsUnterminated = tokenIsUnterminated;
-            setText(text, start, length);
-            var result = callback();
-            end = saveEnd;
-            pos = savePos;
-            startPos = saveStartPos;
-            tokenPos = saveTokenPos;
-            token = saveToken;
-            precedingLineBreak = savePrecedingLineBreak;
-            tokenValue = saveTokenValue;
-            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
-            tokenIsUnterminated = saveTokenIsUnterminated;
-            return result;
-        }
-        function lookAhead(callback) {
-            return speculationHelper(callback, /*isLookahead*/ true);
-        }
-        function tryScan(callback) {
-            return speculationHelper(callback, /*isLookahead*/ false);
-        }
-        function setText(newText, start, length) {
-            text = newText || "";
-            end = length === undefined ? text.length : start + length;
-            setTextPos(start || 0);
-        }
-        function setOnError(errorCallback) {
-            onError = errorCallback;
-        }
-        function setScriptTarget(scriptTarget) {
-            languageVersion = scriptTarget;
-        }
-        function setLanguageVariant(variant) {
-            languageVariant = variant;
-        }
-        function setTextPos(textPos) {
-            ts.Debug.assert(textPos >= 0);
-            pos = textPos;
-            startPos = textPos;
-            tokenPos = textPos;
-            token = 0 /* Unknown */;
-            precedingLineBreak = false;
-            tokenValue = undefined;
-            hasExtendedUnicodeEscape = false;
-            tokenIsUnterminated = false;
-        }
-    }
-    ts.createScanner = createScanner;
-})(ts || (ts = {}));
-/// <reference path="sys.ts" />
-/* @internal */
-var ts;
-(function (ts) {
-    function getDeclarationOfKind(symbol, kind) {
-        var declarations = symbol.declarations;
-        if (declarations) {
-            for (var _i = 0, declarations_1 = declarations; _i < declarations_1.length; _i++) {
-                var declaration = declarations_1[_i];
-                if (declaration.kind === kind) {
-                    return declaration;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getDeclarationOfKind = getDeclarationOfKind;
-    // Pool writers to avoid needing to allocate them for every symbol we write.
-    var stringWriters = [];
-    function getSingleLineStringWriter() {
-        if (stringWriters.length === 0) {
-            var str_1 = "";
-            var writeText = function (text) { return str_1 += text; };
-            return {
-                string: function () { return str_1; },
-                writeKeyword: writeText,
-                writeOperator: writeText,
-                writePunctuation: writeText,
-                writeSpace: writeText,
-                writeStringLiteral: writeText,
-                writeParameter: writeText,
-                writeSymbol: writeText,
-                // Completely ignore indentation for string writers.  And map newlines to
-                // a single space.
-                writeLine: function () { return str_1 += " "; },
-                increaseIndent: function () { },
-                decreaseIndent: function () { },
-                clear: function () { return str_1 = ""; },
-                trackSymbol: function () { },
-                reportInaccessibleThisError: function () { }
-            };
-        }
-        return stringWriters.pop();
-    }
-    ts.getSingleLineStringWriter = getSingleLineStringWriter;
-    function releaseStringWriter(writer) {
-        writer.clear();
-        stringWriters.push(writer);
-    }
-    ts.releaseStringWriter = releaseStringWriter;
-    function getFullWidth(node) {
-        return node.end - node.pos;
-    }
-    ts.getFullWidth = getFullWidth;
-    function mapIsEqualTo(map1, map2) {
-        if (!map1 || !map2) {
-            return map1 === map2;
-        }
-        return containsAll(map1, map2) && containsAll(map2, map1);
-    }
-    ts.mapIsEqualTo = mapIsEqualTo;
-    function containsAll(map, other) {
-        for (var key in map) {
-            if (!ts.hasProperty(map, key)) {
-                continue;
-            }
-            if (!ts.hasProperty(other, key) || map[key] !== other[key]) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function arrayIsEqualTo(array1, array2, equaler) {
-        if (!array1 || !array2) {
-            return array1 === array2;
-        }
-        if (array1.length !== array2.length) {
-            return false;
-        }
-        for (var i = 0; i < array1.length; i++) {
-            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
-            if (!equals) {
-                return false;
-            }
-        }
-        return true;
-    }
-    ts.arrayIsEqualTo = arrayIsEqualTo;
-    function hasResolvedModule(sourceFile, moduleNameText) {
-        return sourceFile.resolvedModules && ts.hasProperty(sourceFile.resolvedModules, moduleNameText);
-    }
-    ts.hasResolvedModule = hasResolvedModule;
-    function getResolvedModule(sourceFile, moduleNameText) {
-        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
-    }
-    ts.getResolvedModule = getResolvedModule;
-    function setResolvedModule(sourceFile, moduleNameText, resolvedModule) {
-        if (!sourceFile.resolvedModules) {
-            sourceFile.resolvedModules = {};
-        }
-        sourceFile.resolvedModules[moduleNameText] = resolvedModule;
-    }
-    ts.setResolvedModule = setResolvedModule;
-    function setResolvedTypeReferenceDirective(sourceFile, typeReferenceDirectiveName, resolvedTypeReferenceDirective) {
-        if (!sourceFile.resolvedTypeReferenceDirectiveNames) {
-            sourceFile.resolvedTypeReferenceDirectiveNames = {};
-        }
-        sourceFile.resolvedTypeReferenceDirectiveNames[typeReferenceDirectiveName] = resolvedTypeReferenceDirective;
-    }
-    ts.setResolvedTypeReferenceDirective = setResolvedTypeReferenceDirective;
-    /* @internal */
-    function moduleResolutionIsEqualTo(oldResolution, newResolution) {
-        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport;
-    }
-    ts.moduleResolutionIsEqualTo = moduleResolutionIsEqualTo;
-    /* @internal */
-    function typeDirectiveIsEqualTo(oldResolution, newResolution) {
-        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.primary === newResolution.primary;
-    }
-    ts.typeDirectiveIsEqualTo = typeDirectiveIsEqualTo;
-    /* @internal */
-    function hasChangesInResolutions(names, newResolutions, oldResolutions, comparer) {
-        if (names.length !== newResolutions.length) {
-            return false;
-        }
-        for (var i = 0; i < names.length; i++) {
-            var newResolution = newResolutions[i];
-            var oldResolution = oldResolutions && ts.hasProperty(oldResolutions, names[i]) ? oldResolutions[names[i]] : undefined;
-            var changed = oldResolution
-                ? !newResolution || !comparer(oldResolution, newResolution)
-                : newResolution;
-            if (changed) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.hasChangesInResolutions = hasChangesInResolutions;
-    // Returns true if this node contains a parse error anywhere underneath it.
-    function containsParseError(node) {
-        aggregateChildData(node);
-        return (node.flags & 268435456 /* ThisNodeOrAnySubNodesHasError */) !== 0;
-    }
-    ts.containsParseError = containsParseError;
-    function aggregateChildData(node) {
-        if (!(node.flags & 536870912 /* HasAggregatedChildData */)) {
-            // A node is considered to contain a parse error if:
-            //  a) the parser explicitly marked that it had an error
-            //  b) any of it's children reported that it had an error.
-            var thisNodeOrAnySubNodesHasError = ((node.flags & 67108864 /* ThisNodeHasError */) !== 0) ||
-                ts.forEachChild(node, containsParseError);
-            // If so, mark ourselves accordingly.
-            if (thisNodeOrAnySubNodesHasError) {
-                node.flags |= 268435456 /* ThisNodeOrAnySubNodesHasError */;
-            }
-            // Also mark that we've propagated the child information to this node.  This way we can
-            // always consult the bit directly on this node without needing to check its children
-            // again.
-            node.flags |= 536870912 /* HasAggregatedChildData */;
-        }
-    }
-    function getSourceFileOfNode(node) {
-        while (node && node.kind !== 256 /* SourceFile */) {
-            node = node.parent;
-        }
-        return node;
-    }
-    ts.getSourceFileOfNode = getSourceFileOfNode;
-    function isStatementWithLocals(node) {
-        switch (node.kind) {
-            case 199 /* Block */:
-            case 227 /* CaseBlock */:
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-                return true;
-        }
-        return false;
-    }
-    ts.isStatementWithLocals = isStatementWithLocals;
-    function getStartPositionOfLine(line, sourceFile) {
-        ts.Debug.assert(line >= 0);
-        return ts.getLineStarts(sourceFile)[line];
-    }
-    ts.getStartPositionOfLine = getStartPositionOfLine;
-    // This is a useful function for debugging purposes.
-    function nodePosToString(node) {
-        var file = getSourceFileOfNode(node);
-        var loc = ts.getLineAndCharacterOfPosition(file, node.pos);
-        return file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + ")";
-    }
-    ts.nodePosToString = nodePosToString;
-    function getStartPosOfNode(node) {
-        return node.pos;
-    }
-    ts.getStartPosOfNode = getStartPosOfNode;
-    function getEndLinePosition(line, sourceFile) {
-        ts.Debug.assert(line >= 0);
-        var lineStarts = ts.getLineStarts(sourceFile);
-        var lineIndex = line;
-        var sourceText = sourceFile.text;
-        if (lineIndex + 1 === lineStarts.length) {
-            // last line - return EOF
-            return sourceText.length - 1;
-        }
-        else {
-            // current line start
-            var start = lineStarts[lineIndex];
-            // take the start position of the next line - 1 = it should be some line break
-            var pos = lineStarts[lineIndex + 1] - 1;
-            ts.Debug.assert(ts.isLineBreak(sourceText.charCodeAt(pos)));
-            // walk backwards skipping line breaks, stop the the beginning of current line.
-            // i.e:
-            // <some text>
-            // $ <- end of line for this position should match the start position
-            while (start <= pos && ts.isLineBreak(sourceText.charCodeAt(pos))) {
-                pos--;
-            }
-            return pos;
-        }
-    }
-    ts.getEndLinePosition = getEndLinePosition;
-    // Returns true if this node is missing from the actual source code. A 'missing' node is different
-    // from 'undefined/defined'. When a node is undefined (which can happen for optional nodes
-    // in the tree), it is definitely missing. However, a node may be defined, but still be
-    // missing.  This happens whenever the parser knows it needs to parse something, but can't
-    // get anything in the source code that it expects at that location. For example:
-    //
-    //          let a: ;
-    //
-    // Here, the Type in the Type-Annotation is not-optional (as there is a colon in the source
-    // code). So the parser will attempt to parse out a type, and will create an actual node.
-    // However, this node will be 'missing' in the sense that no actual source-code/tokens are
-    // contained within it.
-    function nodeIsMissing(node) {
-        if (!node) {
-            return true;
-        }
-        return node.pos === node.end && node.pos >= 0 && node.kind !== 1 /* EndOfFileToken */;
-    }
-    ts.nodeIsMissing = nodeIsMissing;
-    function nodeIsPresent(node) {
-        return !nodeIsMissing(node);
-    }
-    ts.nodeIsPresent = nodeIsPresent;
-    function getTokenPosOfNode(node, sourceFile) {
-        // With nodes that have no width (i.e. 'Missing' nodes), we actually *don't*
-        // want to skip trivia because this will launch us forward to the next token.
-        if (nodeIsMissing(node)) {
-            return node.pos;
-        }
-        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
-    }
-    ts.getTokenPosOfNode = getTokenPosOfNode;
-    function getNonDecoratorTokenPosOfNode(node, sourceFile) {
-        if (nodeIsMissing(node) || !node.decorators) {
-            return getTokenPosOfNode(node, sourceFile);
-        }
-        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.decorators.end);
-    }
-    ts.getNonDecoratorTokenPosOfNode = getNonDecoratorTokenPosOfNode;
-    function getSourceTextOfNodeFromSourceFile(sourceFile, node, includeTrivia) {
-        if (includeTrivia === void 0) { includeTrivia = false; }
-        if (nodeIsMissing(node)) {
-            return "";
-        }
-        var text = sourceFile.text;
-        return text.substring(includeTrivia ? node.pos : ts.skipTrivia(text, node.pos), node.end);
-    }
-    ts.getSourceTextOfNodeFromSourceFile = getSourceTextOfNodeFromSourceFile;
-    function getTextOfNodeFromSourceText(sourceText, node) {
-        if (nodeIsMissing(node)) {
-            return "";
-        }
-        return sourceText.substring(ts.skipTrivia(sourceText, node.pos), node.end);
-    }
-    ts.getTextOfNodeFromSourceText = getTextOfNodeFromSourceText;
-    function getTextOfNode(node, includeTrivia) {
-        if (includeTrivia === void 0) { includeTrivia = false; }
-        return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
-    }
-    ts.getTextOfNode = getTextOfNode;
-    // Add an extra underscore to identifiers that start with two underscores to avoid issues with magic names like '__proto__'
-    function escapeIdentifier(identifier) {
-        return identifier.length >= 2 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ ? "_" + identifier : identifier;
-    }
-    ts.escapeIdentifier = escapeIdentifier;
-    // Remove extra underscore from escaped identifier
-    function unescapeIdentifier(identifier) {
-        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ && identifier.charCodeAt(2) === 95 /* _ */ ? identifier.substr(1) : identifier;
-    }
-    ts.unescapeIdentifier = unescapeIdentifier;
-    // Make an identifier from an external module name by extracting the string after the last "/" and replacing
-    // all non-alphanumeric characters with underscores
-    function makeIdentifierFromModuleName(moduleName) {
-        return ts.getBaseFileName(moduleName).replace(/^(\d)/, "_$1").replace(/\W/g, "_");
-    }
-    ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
-    function isBlockOrCatchScoped(declaration) {
-        return (getCombinedNodeFlags(declaration) & 3072 /* BlockScoped */) !== 0 ||
-            isCatchClauseVariableDeclaration(declaration);
-    }
-    ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
-    function isAmbientModule(node) {
-        return node && node.kind === 225 /* ModuleDeclaration */ &&
-            (node.name.kind === 9 /* StringLiteral */ || isGlobalScopeAugmentation(node));
-    }
-    ts.isAmbientModule = isAmbientModule;
-    function isBlockScopedContainerTopLevel(node) {
-        return node.kind === 256 /* SourceFile */ ||
-            node.kind === 225 /* ModuleDeclaration */ ||
-            isFunctionLike(node) ||
-            isFunctionBlock(node);
-    }
-    ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
-    function isGlobalScopeAugmentation(module) {
-        return !!(module.flags & 131072 /* GlobalAugmentation */);
-    }
-    ts.isGlobalScopeAugmentation = isGlobalScopeAugmentation;
-    function isExternalModuleAugmentation(node) {
-        // external module augmentation is a ambient module declaration that is either:
-        // - defined in the top level scope and source file is an external module
-        // - defined inside ambient module declaration located in the top level scope and source file not an external module
-        if (!node || !isAmbientModule(node)) {
-            return false;
-        }
-        switch (node.parent.kind) {
-            case 256 /* SourceFile */:
-                return ts.isExternalModule(node.parent);
-            case 226 /* ModuleBlock */:
-                return isAmbientModule(node.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
-        }
-        return false;
-    }
-    ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
-    // Gets the nearest enclosing block scope container that has the provided node
-    // as a descendant, that is not the provided node.
-    function getEnclosingBlockScopeContainer(node) {
-        var current = node.parent;
-        while (current) {
-            if (isFunctionLike(current)) {
-                return current;
-            }
-            switch (current.kind) {
-                case 256 /* SourceFile */:
-                case 227 /* CaseBlock */:
-                case 252 /* CatchClause */:
-                case 225 /* ModuleDeclaration */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                    return current;
-                case 199 /* Block */:
-                    // function block is not considered block-scope container
-                    // see comment in binder.ts: bind(...), case for SyntaxKind.Block
-                    if (!isFunctionLike(current.parent)) {
-                        return current;
-                    }
-            }
-            current = current.parent;
-        }
-    }
-    ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
-    function isCatchClauseVariableDeclaration(declaration) {
-        return declaration &&
-            declaration.kind === 218 /* VariableDeclaration */ &&
-            declaration.parent &&
-            declaration.parent.kind === 252 /* CatchClause */;
-    }
-    ts.isCatchClauseVariableDeclaration = isCatchClauseVariableDeclaration;
-    // Return display name of an identifier
-    // Computed property names will just be emitted as "[<expr>]", where <expr> is the source
-    // text of the expression in the computed property.
-    function declarationNameToString(name) {
-        return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
-    }
-    ts.declarationNameToString = declarationNameToString;
-    function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
-        var sourceFile = getSourceFileOfNode(node);
-        var span = getErrorSpanForNode(sourceFile, node);
-        return ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2);
-    }
-    ts.createDiagnosticForNode = createDiagnosticForNode;
-    function createDiagnosticForNodeFromMessageChain(node, messageChain) {
-        var sourceFile = getSourceFileOfNode(node);
-        var span = getErrorSpanForNode(sourceFile, node);
-        return {
-            file: sourceFile,
-            start: span.start,
-            length: span.length,
-            code: messageChain.code,
-            category: messageChain.category,
-            messageText: messageChain.next ? messageChain : messageChain.messageText
-        };
-    }
-    ts.createDiagnosticForNodeFromMessageChain = createDiagnosticForNodeFromMessageChain;
-    function getSpanOfTokenAtPosition(sourceFile, pos) {
-        var scanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ true, sourceFile.languageVariant, sourceFile.text, /*onError:*/ undefined, pos);
-        scanner.scan();
-        var start = scanner.getTokenPos();
-        return ts.createTextSpanFromBounds(start, scanner.getTextPos());
-    }
-    ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
-    function getErrorSpanForArrowFunction(sourceFile, node) {
-        var pos = ts.skipTrivia(sourceFile.text, node.pos);
-        if (node.body && node.body.kind === 199 /* Block */) {
-            var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
-            var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
-            if (startLine < endLine) {
-                // The arrow function spans multiple lines,
-                // make the error span be the first line, inclusive.
-                return ts.createTextSpan(pos, getEndLinePosition(startLine, sourceFile) - pos + 1);
-            }
-        }
-        return ts.createTextSpanFromBounds(pos, node.end);
-    }
-    function getErrorSpanForNode(sourceFile, node) {
-        var errorNode = node;
-        switch (node.kind) {
-            case 256 /* SourceFile */:
-                var pos_1 = ts.skipTrivia(sourceFile.text, 0, /*stopAfterLineBreak*/ false);
-                if (pos_1 === sourceFile.text.length) {
-                    // file is empty - return span for the beginning of the file
-                    return ts.createTextSpan(0, 0);
-                }
-                return getSpanOfTokenAtPosition(sourceFile, pos_1);
-            // This list is a work in progress. Add missing node kinds to improve their error
-            // spans.
-            case 218 /* VariableDeclaration */:
-            case 169 /* BindingElement */:
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-            case 222 /* InterfaceDeclaration */:
-            case 225 /* ModuleDeclaration */:
-            case 224 /* EnumDeclaration */:
-            case 255 /* EnumMember */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 147 /* MethodDeclaration */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 223 /* TypeAliasDeclaration */:
-                errorNode = node.name;
-                break;
-            case 180 /* ArrowFunction */:
-                return getErrorSpanForArrowFunction(sourceFile, node);
-        }
-        if (errorNode === undefined) {
-            // If we don't have a better node, then just set the error on the first token of
-            // construct.
-            return getSpanOfTokenAtPosition(sourceFile, node.pos);
-        }
-        var pos = nodeIsMissing(errorNode)
-            ? errorNode.pos
-            : ts.skipTrivia(sourceFile.text, errorNode.pos);
-        return ts.createTextSpanFromBounds(pos, errorNode.end);
-    }
-    ts.getErrorSpanForNode = getErrorSpanForNode;
-    function isExternalOrCommonJsModule(file) {
-        return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
-    }
-    ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
-    function isDeclarationFile(file) {
-        return file.isDeclarationFile;
-    }
-    ts.isDeclarationFile = isDeclarationFile;
-    function isConstEnumDeclaration(node) {
-        return node.kind === 224 /* EnumDeclaration */ && isConst(node);
-    }
-    ts.isConstEnumDeclaration = isConstEnumDeclaration;
-    function walkUpBindingElementsAndPatterns(node) {
-        while (node && (node.kind === 169 /* BindingElement */ || isBindingPattern(node))) {
-            node = node.parent;
-        }
-        return node;
-    }
-    // Returns the node flags for this node and all relevant parent nodes.  This is done so that
-    // nodes like variable declarations and binding elements can returned a view of their flags
-    // that includes the modifiers from their container.  i.e. flags like export/declare aren't
-    // stored on the variable declaration directly, but on the containing variable statement
-    // (if it has one).  Similarly, flags for let/const are store on the variable declaration
-    // list.  By calling this function, all those flags are combined so that the client can treat
-    // the node as if it actually had those flags.
-    function getCombinedNodeFlags(node) {
-        node = walkUpBindingElementsAndPatterns(node);
-        var flags = node.flags;
-        if (node.kind === 218 /* VariableDeclaration */) {
-            node = node.parent;
-        }
-        if (node && node.kind === 219 /* VariableDeclarationList */) {
-            flags |= node.flags;
-            node = node.parent;
-        }
-        if (node && node.kind === 200 /* VariableStatement */) {
-            flags |= node.flags;
-        }
-        return flags;
-    }
-    ts.getCombinedNodeFlags = getCombinedNodeFlags;
-    function isConst(node) {
-        return !!(getCombinedNodeFlags(node) & 2048 /* Const */);
-    }
-    ts.isConst = isConst;
-    function isLet(node) {
-        return !!(getCombinedNodeFlags(node) & 1024 /* Let */);
-    }
-    ts.isLet = isLet;
-    function isSuperCallExpression(n) {
-        return n.kind === 174 /* CallExpression */ && n.expression.kind === 95 /* SuperKeyword */;
-    }
-    ts.isSuperCallExpression = isSuperCallExpression;
-    function isPrologueDirective(node) {
-        return node.kind === 202 /* ExpressionStatement */ && node.expression.kind === 9 /* StringLiteral */;
-    }
-    ts.isPrologueDirective = isPrologueDirective;
-    function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
-        return ts.getLeadingCommentRanges(sourceFileOfNode.text, node.pos);
-    }
-    ts.getLeadingCommentRangesOfNode = getLeadingCommentRangesOfNode;
-    function getLeadingCommentRangesOfNodeFromText(node, text) {
-        return ts.getLeadingCommentRanges(text, node.pos);
-    }
-    ts.getLeadingCommentRangesOfNodeFromText = getLeadingCommentRangesOfNodeFromText;
-    function getJsDocComments(node, sourceFileOfNode) {
-        return getJsDocCommentsFromText(node, sourceFileOfNode.text);
-    }
-    ts.getJsDocComments = getJsDocComments;
-    function getJsDocCommentsFromText(node, text) {
-        var commentRanges = (node.kind === 142 /* Parameter */ || node.kind === 141 /* TypeParameter */) ?
-            ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
-            getLeadingCommentRangesOfNodeFromText(node, text);
-        return ts.filter(commentRanges, isJsDocComment);
-        function isJsDocComment(comment) {
-            // True if the comment starts with '/**' but not if it is '/**/'
-            return text.charCodeAt(comment.pos + 1) === 42 /* asterisk */ &&
-                text.charCodeAt(comment.pos + 2) === 42 /* asterisk */ &&
-                text.charCodeAt(comment.pos + 3) !== 47 /* slash */;
-        }
-    }
-    ts.getJsDocCommentsFromText = getJsDocCommentsFromText;
-    ts.fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
-    ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx = /^(\/\/\/\s*<reference\s+types\s*=\s*)('|")(.+?)\2.*?\/>/;
-    ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
-    function isTypeNode(node) {
-        if (154 /* FirstTypeNode */ <= node.kind && node.kind <= 166 /* LastTypeNode */) {
-            return true;
-        }
-        switch (node.kind) {
-            case 117 /* AnyKeyword */:
-            case 130 /* NumberKeyword */:
-            case 132 /* StringKeyword */:
-            case 120 /* BooleanKeyword */:
-            case 133 /* SymbolKeyword */:
-            case 135 /* UndefinedKeyword */:
-            case 127 /* NeverKeyword */:
-                return true;
-            case 103 /* VoidKeyword */:
-                return node.parent.kind !== 183 /* VoidExpression */;
-            case 194 /* ExpressionWithTypeArguments */:
-                return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
-            // Identifiers and qualified names may be type nodes, depending on their context. Climb
-            // above them to find the lowest container
-            case 69 /* Identifier */:
-                // If the identifier is the RHS of a qualified name, then it's a type iff its parent is.
-                if (node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node) {
-                    node = node.parent;
-                }
-                else if (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node) {
-                    node = node.parent;
-                }
-                // At this point, node is either a qualified name or an identifier
-                ts.Debug.assert(node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */ || node.kind === 172 /* PropertyAccessExpression */, "'node' was expected to be a qualified name, identifier or property access in 'isTypeNode'.");
-            case 139 /* QualifiedName */:
-            case 172 /* PropertyAccessExpression */:
-            case 97 /* ThisKeyword */:
-                var parent_1 = node.parent;
-                if (parent_1.kind === 158 /* TypeQuery */) {
-                    return false;
-                }
-                // Do not recursively call isTypeNode on the parent. In the example:
-                //
-                //     let a: A.B.C;
-                //
-                // Calling isTypeNode would consider the qualified name A.B a type node. Only C or
-                // A.B.C is a type node.
-                if (154 /* FirstTypeNode */ <= parent_1.kind && parent_1.kind <= 166 /* LastTypeNode */) {
-                    return true;
-                }
-                switch (parent_1.kind) {
-                    case 194 /* ExpressionWithTypeArguments */:
-                        return !isExpressionWithTypeArgumentsInClassExtendsClause(parent_1);
-                    case 141 /* TypeParameter */:
-                        return node === parent_1.constraint;
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 142 /* Parameter */:
-                    case 218 /* VariableDeclaration */:
-                        return node === parent_1.type;
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 148 /* Constructor */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        return node === parent_1.type;
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                        return node === parent_1.type;
-                    case 177 /* TypeAssertionExpression */:
-                        return node === parent_1.type;
-                    case 174 /* CallExpression */:
-                    case 175 /* NewExpression */:
-                        return parent_1.typeArguments && ts.indexOf(parent_1.typeArguments, node) >= 0;
-                    case 176 /* TaggedTemplateExpression */:
-                        // TODO (drosen): TaggedTemplateExpressions may eventually support type arguments.
-                        return false;
-                }
-        }
-        return false;
-    }
-    ts.isTypeNode = isTypeNode;
-    // Warning: This has the same semantics as the forEach family of functions,
-    //          in that traversal terminates in the event that 'visitor' supplies a truthy value.
-    function forEachReturnStatement(body, visitor) {
-        return traverse(body);
-        function traverse(node) {
-            switch (node.kind) {
-                case 211 /* ReturnStatement */:
-                    return visitor(node);
-                case 227 /* CaseBlock */:
-                case 199 /* Block */:
-                case 203 /* IfStatement */:
-                case 204 /* DoStatement */:
-                case 205 /* WhileStatement */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                case 212 /* WithStatement */:
-                case 213 /* SwitchStatement */:
-                case 249 /* CaseClause */:
-                case 250 /* DefaultClause */:
-                case 214 /* LabeledStatement */:
-                case 216 /* TryStatement */:
-                case 252 /* CatchClause */:
-                    return ts.forEachChild(node, traverse);
-            }
-        }
-    }
-    ts.forEachReturnStatement = forEachReturnStatement;
-    function forEachYieldExpression(body, visitor) {
-        return traverse(body);
-        function traverse(node) {
-            switch (node.kind) {
-                case 190 /* YieldExpression */:
-                    visitor(node);
-                    var operand = node.expression;
-                    if (operand) {
-                        traverse(operand);
-                    }
-                case 224 /* EnumDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
-                    // These are not allowed inside a generator now, but eventually they may be allowed
-                    // as local types. Regardless, any yield statements contained within them should be
-                    // skipped in this traversal.
-                    return;
-                default:
-                    if (isFunctionLike(node)) {
-                        var name_5 = node.name;
-                        if (name_5 && name_5.kind === 140 /* ComputedPropertyName */) {
-                            // Note that we will not include methods/accessors of a class because they would require
-                            // first descending into the class. This is by design.
-                            traverse(name_5.expression);
-                            return;
-                        }
-                    }
-                    else if (!isTypeNode(node)) {
-                        // This is the general case, which should include mostly expressions and statements.
-                        // Also includes NodeArrays.
-                        ts.forEachChild(node, traverse);
-                    }
-            }
-        }
-    }
-    ts.forEachYieldExpression = forEachYieldExpression;
-    function isVariableLike(node) {
-        if (node) {
-            switch (node.kind) {
-                case 169 /* BindingElement */:
-                case 255 /* EnumMember */:
-                case 142 /* Parameter */:
-                case 253 /* PropertyAssignment */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 254 /* ShorthandPropertyAssignment */:
-                case 218 /* VariableDeclaration */:
-                    return true;
-            }
-        }
-        return false;
-    }
-    ts.isVariableLike = isVariableLike;
-    function isAccessor(node) {
-        return node && (node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */);
-    }
-    ts.isAccessor = isAccessor;
-    function isClassLike(node) {
-        return node && (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */);
-    }
-    ts.isClassLike = isClassLike;
-    function isFunctionLike(node) {
-        return node && isFunctionLikeKind(node.kind);
-    }
-    ts.isFunctionLike = isFunctionLike;
-    function isFunctionLikeKind(kind) {
-        switch (kind) {
-            case 148 /* Constructor */:
-            case 179 /* FunctionExpression */:
-            case 220 /* FunctionDeclaration */:
-            case 180 /* ArrowFunction */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 151 /* CallSignature */:
-            case 152 /* ConstructSignature */:
-            case 153 /* IndexSignature */:
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
-                return true;
-        }
-    }
-    ts.isFunctionLikeKind = isFunctionLikeKind;
-    function introducesArgumentsExoticObject(node) {
-        switch (node.kind) {
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-                return true;
-        }
-        return false;
-    }
-    ts.introducesArgumentsExoticObject = introducesArgumentsExoticObject;
-    function isIterationStatement(node, lookInLabeledStatements) {
-        switch (node.kind) {
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-            case 204 /* DoStatement */:
-            case 205 /* WhileStatement */:
-                return true;
-            case 214 /* LabeledStatement */:
-                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
-        }
-        return false;
-    }
-    ts.isIterationStatement = isIterationStatement;
-    function isFunctionBlock(node) {
-        return node && node.kind === 199 /* Block */ && isFunctionLike(node.parent);
-    }
-    ts.isFunctionBlock = isFunctionBlock;
-    function isObjectLiteralMethod(node) {
-        return node && node.kind === 147 /* MethodDeclaration */ && node.parent.kind === 171 /* ObjectLiteralExpression */;
-    }
-    ts.isObjectLiteralMethod = isObjectLiteralMethod;
-    function isIdentifierTypePredicate(predicate) {
-        return predicate && predicate.kind === 1 /* Identifier */;
-    }
-    ts.isIdentifierTypePredicate = isIdentifierTypePredicate;
-    function isThisTypePredicate(predicate) {
-        return predicate && predicate.kind === 0 /* This */;
-    }
-    ts.isThisTypePredicate = isThisTypePredicate;
-    function getContainingFunction(node) {
-        while (true) {
-            node = node.parent;
-            if (!node || isFunctionLike(node)) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingFunction = getContainingFunction;
-    function getContainingFunctionOrModule(node) {
-        while (true) {
-            node = node.parent;
-            if (isFunctionLike(node) || node.kind === 225 /* ModuleDeclaration */ || node.kind === 256 /* SourceFile */) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingFunctionOrModule = getContainingFunctionOrModule;
-    function getContainingClass(node) {
-        while (true) {
-            node = node.parent;
-            if (!node || isClassLike(node)) {
-                return node;
-            }
-        }
-    }
-    ts.getContainingClass = getContainingClass;
-    function getThisContainer(node, includeArrowFunctions) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return undefined;
-            }
-            switch (node.kind) {
-                case 140 /* ComputedPropertyName */:
-                    // If the grandparent node is an object literal (as opposed to a class),
-                    // then the computed property is not a 'this' container.
-                    // A computed property name in a class needs to be a this container
-                    // so that we can error on it.
-                    if (isClassLike(node.parent.parent)) {
-                        return node;
-                    }
-                    // If this is a computed property, then the parent should not
-                    // make it a this container. The parent might be a property
-                    // in an object literal, like a method or accessor. But in order for
-                    // such a parent to be a this container, the reference must be in
-                    // the *body* of the container.
-                    node = node.parent;
-                    break;
-                case 143 /* Decorator */:
-                    // Decorators are always applied outside of the body of a class or method.
-                    if (node.parent.kind === 142 /* Parameter */ && isClassElement(node.parent.parent)) {
-                        // If the decorator's parent is a Parameter, we resolve the this container from
-                        // the grandparent class declaration.
-                        node = node.parent.parent;
-                    }
-                    else if (isClassElement(node.parent)) {
-                        // If the decorator's parent is a class element, we resolve the 'this' container
-                        // from the parent class declaration.
-                        node = node.parent;
-                    }
-                    break;
-                case 180 /* ArrowFunction */:
-                    if (!includeArrowFunctions) {
-                        continue;
-                    }
-                // Fall through
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 225 /* ModuleDeclaration */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                case 224 /* EnumDeclaration */:
-                case 256 /* SourceFile */:
-                    return node;
-            }
-        }
-    }
-    ts.getThisContainer = getThisContainer;
-    /**
-      * Given an super call\property node returns a closest node where either
-      * - super call\property is legal in the node and not legal in the parent node the node.
-      *   i.e. super call is legal in constructor but not legal in the class body.
-      * - node is arrow function (so caller might need to call getSuperContainer in case it needs to climb higher)
-      * - super call\property is definitely illegal in the node (but might be legal in some subnode)
-      *   i.e. super property access is illegal in function declaration but can be legal in the statement list
-      */
-    function getSuperContainer(node, stopOnFunctions) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return node;
-            }
-            switch (node.kind) {
-                case 140 /* ComputedPropertyName */:
-                    node = node.parent;
-                    break;
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    if (!stopOnFunctions) {
-                        continue;
-                    }
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return node;
-                case 143 /* Decorator */:
-                    // Decorators are always applied outside of the body of a class or method.
-                    if (node.parent.kind === 142 /* Parameter */ && isClassElement(node.parent.parent)) {
-                        // If the decorator's parent is a Parameter, we resolve the this container from
-                        // the grandparent class declaration.
-                        node = node.parent.parent;
-                    }
-                    else if (isClassElement(node.parent)) {
-                        // If the decorator's parent is a class element, we resolve the 'this' container
-                        // from the parent class declaration.
-                        node = node.parent;
-                    }
-                    break;
-            }
-        }
-    }
-    ts.getSuperContainer = getSuperContainer;
-    /**
-     * Determines whether a node is a property or element access expression for super.
-     */
-    function isSuperPropertyOrElementAccess(node) {
-        return (node.kind === 172 /* PropertyAccessExpression */
-            || node.kind === 173 /* ElementAccessExpression */)
-            && node.expression.kind === 95 /* SuperKeyword */;
-    }
-    ts.isSuperPropertyOrElementAccess = isSuperPropertyOrElementAccess;
-    function getEntityNameFromTypeNode(node) {
-        if (node) {
-            switch (node.kind) {
-                case 155 /* TypeReference */:
-                    return node.typeName;
-                case 194 /* ExpressionWithTypeArguments */:
-                    return node.expression;
-                case 69 /* Identifier */:
-                case 139 /* QualifiedName */:
-                    return node;
-            }
-        }
-        return undefined;
-    }
-    ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
-    function getInvokedExpression(node) {
-        if (node.kind === 176 /* TaggedTemplateExpression */) {
-            return node.tag;
-        }
-        // Will either be a CallExpression, NewExpression, or Decorator.
-        return node.expression;
-    }
-    ts.getInvokedExpression = getInvokedExpression;
-    function nodeCanBeDecorated(node) {
-        switch (node.kind) {
-            case 221 /* ClassDeclaration */:
-                // classes are valid targets
-                return true;
-            case 145 /* PropertyDeclaration */:
-                // property declarations are valid if their parent is a class declaration.
-                return node.parent.kind === 221 /* ClassDeclaration */;
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 147 /* MethodDeclaration */:
-                // if this method has a body and its parent is a class declaration, this is a valid target.
-                return node.body !== undefined
-                    && node.parent.kind === 221 /* ClassDeclaration */;
-            case 142 /* Parameter */:
-                // if the parameter's parent has a body and its grandparent is a class declaration, this is a valid target;
-                return node.parent.body !== undefined
-                    && (node.parent.kind === 148 /* Constructor */
-                        || node.parent.kind === 147 /* MethodDeclaration */
-                        || node.parent.kind === 150 /* SetAccessor */)
-                    && node.parent.parent.kind === 221 /* ClassDeclaration */;
-        }
-        return false;
-    }
-    ts.nodeCanBeDecorated = nodeCanBeDecorated;
-    function nodeIsDecorated(node) {
-        return node.decorators !== undefined
-            && nodeCanBeDecorated(node);
-    }
-    ts.nodeIsDecorated = nodeIsDecorated;
-    function isPropertyAccessExpression(node) {
-        return node.kind === 172 /* PropertyAccessExpression */;
-    }
-    ts.isPropertyAccessExpression = isPropertyAccessExpression;
-    function isElementAccessExpression(node) {
-        return node.kind === 173 /* ElementAccessExpression */;
-    }
-    ts.isElementAccessExpression = isElementAccessExpression;
-    function isJSXTagName(node) {
-        var parent = node.parent;
-        if (parent.kind === 243 /* JsxOpeningElement */ ||
-            parent.kind === 242 /* JsxSelfClosingElement */ ||
-            parent.kind === 245 /* JsxClosingElement */) {
-            return parent.tagName === node;
-        }
-        return false;
-    }
-    ts.isJSXTagName = isJSXTagName;
-    function isExpression(node) {
-        switch (node.kind) {
-            case 97 /* ThisKeyword */:
-            case 95 /* SuperKeyword */:
-            case 93 /* NullKeyword */:
-            case 99 /* TrueKeyword */:
-            case 84 /* FalseKeyword */:
-            case 10 /* RegularExpressionLiteral */:
-            case 170 /* ArrayLiteralExpression */:
-            case 171 /* ObjectLiteralExpression */:
-            case 172 /* PropertyAccessExpression */:
-            case 173 /* ElementAccessExpression */:
-            case 174 /* CallExpression */:
-            case 175 /* NewExpression */:
-            case 176 /* TaggedTemplateExpression */:
-            case 195 /* AsExpression */:
-            case 177 /* TypeAssertionExpression */:
-            case 196 /* NonNullExpression */:
-            case 178 /* ParenthesizedExpression */:
-            case 179 /* FunctionExpression */:
-            case 192 /* ClassExpression */:
-            case 180 /* ArrowFunction */:
-            case 183 /* VoidExpression */:
-            case 181 /* DeleteExpression */:
-            case 182 /* TypeOfExpression */:
-            case 185 /* PrefixUnaryExpression */:
-            case 186 /* PostfixUnaryExpression */:
-            case 187 /* BinaryExpression */:
-            case 188 /* ConditionalExpression */:
-            case 191 /* SpreadElementExpression */:
-            case 189 /* TemplateExpression */:
-            case 11 /* NoSubstitutionTemplateLiteral */:
-            case 193 /* OmittedExpression */:
-            case 241 /* JsxElement */:
-            case 242 /* JsxSelfClosingElement */:
-            case 190 /* YieldExpression */:
-            case 184 /* AwaitExpression */:
-                return true;
-            case 139 /* QualifiedName */:
-                while (node.parent.kind === 139 /* QualifiedName */) {
-                    node = node.parent;
-                }
-                return node.parent.kind === 158 /* TypeQuery */ || isJSXTagName(node);
-            case 69 /* Identifier */:
-                if (node.parent.kind === 158 /* TypeQuery */ || isJSXTagName(node)) {
-                    return true;
-                }
-            // fall through
-            case 8 /* NumericLiteral */:
-            case 9 /* StringLiteral */:
-            case 97 /* ThisKeyword */:
-                var parent_2 = node.parent;
-                switch (parent_2.kind) {
-                    case 218 /* VariableDeclaration */:
-                    case 142 /* Parameter */:
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 255 /* EnumMember */:
-                    case 253 /* PropertyAssignment */:
-                    case 169 /* BindingElement */:
-                        return parent_2.initializer === node;
-                    case 202 /* ExpressionStatement */:
-                    case 203 /* IfStatement */:
-                    case 204 /* DoStatement */:
-                    case 205 /* WhileStatement */:
-                    case 211 /* ReturnStatement */:
-                    case 212 /* WithStatement */:
-                    case 213 /* SwitchStatement */:
-                    case 249 /* CaseClause */:
-                    case 215 /* ThrowStatement */:
-                    case 213 /* SwitchStatement */:
-                        return parent_2.expression === node;
-                    case 206 /* ForStatement */:
-                        var forStatement = parent_2;
-                        return (forStatement.initializer === node && forStatement.initializer.kind !== 219 /* VariableDeclarationList */) ||
-                            forStatement.condition === node ||
-                            forStatement.incrementor === node;
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                        var forInStatement = parent_2;
-                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 219 /* VariableDeclarationList */) ||
-                            forInStatement.expression === node;
-                    case 177 /* TypeAssertionExpression */:
-                    case 195 /* AsExpression */:
-                        return node === parent_2.expression;
-                    case 197 /* TemplateSpan */:
-                        return node === parent_2.expression;
-                    case 140 /* ComputedPropertyName */:
-                        return node === parent_2.expression;
-                    case 143 /* Decorator */:
-                    case 248 /* JsxExpression */:
-                    case 247 /* JsxSpreadAttribute */:
-                        return true;
-                    case 194 /* ExpressionWithTypeArguments */:
-                        return parent_2.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent_2);
-                    default:
-                        if (isExpression(parent_2)) {
-                            return true;
-                        }
-                }
-        }
-        return false;
-    }
-    ts.isExpression = isExpression;
-    function isExternalModuleNameRelative(moduleName) {
-        // TypeScript 1.0 spec (April 2014): 11.2.1
-        // An external module name is "relative" if the first term is "." or "..".
-        return moduleName.substr(0, 2) === "./" || moduleName.substr(0, 3) === "../" || moduleName.substr(0, 2) === ".\\" || moduleName.substr(0, 3) === "..\\";
-    }
-    ts.isExternalModuleNameRelative = isExternalModuleNameRelative;
-    function isInstantiatedModule(node, preserveConstEnums) {
-        var moduleState = ts.getModuleInstanceState(node);
-        return moduleState === 1 /* Instantiated */ ||
-            (preserveConstEnums && moduleState === 2 /* ConstEnumOnly */);
-    }
-    ts.isInstantiatedModule = isInstantiatedModule;
-    function isExternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 240 /* ExternalModuleReference */;
-    }
-    ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
-    function getExternalModuleImportEqualsDeclarationExpression(node) {
-        ts.Debug.assert(isExternalModuleImportEqualsDeclaration(node));
-        return node.moduleReference.expression;
-    }
-    ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
-    function isInternalModuleImportEqualsDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind !== 240 /* ExternalModuleReference */;
-    }
-    ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
-    function isSourceFileJavaScript(file) {
-        return isInJavaScriptFile(file);
-    }
-    ts.isSourceFileJavaScript = isSourceFileJavaScript;
-    function isInJavaScriptFile(node) {
-        return node && !!(node.flags & 134217728 /* JavaScriptFile */);
-    }
-    ts.isInJavaScriptFile = isInJavaScriptFile;
-    /**
-     * Returns true if the node is a CallExpression to the identifier 'require' with
-     * exactly one argument.
-     * This function does not test if the node is in a JavaScript file or not.
-    */
-    function isRequireCall(expression, checkArgumentIsStringLiteral) {
-        // of the form 'require("name")'
-        var isRequire = expression.kind === 174 /* CallExpression */ &&
-            expression.expression.kind === 69 /* Identifier */ &&
-            expression.expression.text === "require" &&
-            expression.arguments.length === 1;
-        return isRequire && (!checkArgumentIsStringLiteral || expression.arguments[0].kind === 9 /* StringLiteral */);
-    }
-    ts.isRequireCall = isRequireCall;
-    function isSingleOrDoubleQuote(charCode) {
-        return charCode === 39 /* singleQuote */ || charCode === 34 /* doubleQuote */;
-    }
-    ts.isSingleOrDoubleQuote = isSingleOrDoubleQuote;
-    /// Given a BinaryExpression, returns SpecialPropertyAssignmentKind for the various kinds of property
-    /// assignments we treat as special in the binder
-    function getSpecialPropertyAssignmentKind(expression) {
-        if (!isInJavaScriptFile(expression)) {
-            return 0 /* None */;
-        }
-        if (expression.kind !== 187 /* BinaryExpression */) {
-            return 0 /* None */;
-        }
-        var expr = expression;
-        if (expr.operatorToken.kind !== 56 /* EqualsToken */ || expr.left.kind !== 172 /* PropertyAccessExpression */) {
-            return 0 /* None */;
-        }
-        var lhs = expr.left;
-        if (lhs.expression.kind === 69 /* Identifier */) {
-            var lhsId = lhs.expression;
-            if (lhsId.text === "exports") {
-                // exports.name = expr
-                return 1 /* ExportsProperty */;
-            }
-            else if (lhsId.text === "module" && lhs.name.text === "exports") {
-                // module.exports = expr
-                return 2 /* ModuleExports */;
-            }
-        }
-        else if (lhs.expression.kind === 97 /* ThisKeyword */) {
-            return 4 /* ThisProperty */;
-        }
-        else if (lhs.expression.kind === 172 /* PropertyAccessExpression */) {
-            // chained dot, e.g. x.y.z = expr; this var is the 'x.y' part
-            var innerPropertyAccess = lhs.expression;
-            if (innerPropertyAccess.expression.kind === 69 /* Identifier */) {
-                // module.exports.name = expr
-                var innerPropertyAccessIdentifier = innerPropertyAccess.expression;
-                if (innerPropertyAccessIdentifier.text === "module" && innerPropertyAccess.name.text === "exports") {
-                    return 1 /* ExportsProperty */;
-                }
-                if (innerPropertyAccess.name.text === "prototype") {
-                    return 3 /* PrototypeProperty */;
-                }
-            }
-        }
-        return 0 /* None */;
-    }
-    ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
-    function getExternalModuleName(node) {
-        if (node.kind === 230 /* ImportDeclaration */) {
-            return node.moduleSpecifier;
-        }
-        if (node.kind === 229 /* ImportEqualsDeclaration */) {
-            var reference = node.moduleReference;
-            if (reference.kind === 240 /* ExternalModuleReference */) {
-                return reference.expression;
-            }
-        }
-        if (node.kind === 236 /* ExportDeclaration */) {
-            return node.moduleSpecifier;
-        }
-        if (node.kind === 225 /* ModuleDeclaration */ && node.name.kind === 9 /* StringLiteral */) {
-            return node.name;
-        }
-    }
-    ts.getExternalModuleName = getExternalModuleName;
-    function hasQuestionToken(node) {
-        if (node) {
-            switch (node.kind) {
-                case 142 /* Parameter */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 254 /* ShorthandPropertyAssignment */:
-                case 253 /* PropertyAssignment */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    return node.questionToken !== undefined;
-            }
-        }
-        return false;
-    }
-    ts.hasQuestionToken = hasQuestionToken;
-    function isJSDocConstructSignature(node) {
-        return node.kind === 269 /* JSDocFunctionType */ &&
-            node.parameters.length > 0 &&
-            node.parameters[0].type.kind === 271 /* JSDocConstructorType */;
-    }
-    ts.isJSDocConstructSignature = isJSDocConstructSignature;
-    function getJSDocTag(node, kind, checkParentVariableStatement) {
-        if (!node) {
-            return undefined;
-        }
-        var jsDocComment = getJSDocComment(node, checkParentVariableStatement);
-        if (!jsDocComment) {
-            return undefined;
-        }
-        for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-            var tag = _a[_i];
-            if (tag.kind === kind) {
-                return tag;
-            }
-        }
-    }
-    function getJSDocComment(node, checkParentVariableStatement) {
-        if (node.jsDocComment) {
-            return node.jsDocComment;
-        }
-        // Try to recognize this pattern when node is initializer of variable declaration and JSDoc comments are on containing variable statement.
-        // /**
-        //   * @param {number} name
-        //   * @returns {number}
-        //   */
-        // var x = function(name) { return name.length; }
-        if (checkParentVariableStatement) {
-            var isInitializerOfVariableDeclarationInStatement = node.parent.kind === 218 /* VariableDeclaration */ &&
-                node.parent.initializer === node &&
-                node.parent.parent.parent.kind === 200 /* VariableStatement */;
-            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent : undefined;
-            if (variableStatementNode) {
-                return variableStatementNode.jsDocComment;
-            }
-            // Also recognize when the node is the RHS of an assignment expression
-            var parent_3 = node.parent;
-            var isSourceOfAssignmentExpressionStatement = parent_3 && parent_3.parent &&
-                parent_3.kind === 187 /* BinaryExpression */ &&
-                parent_3.operatorToken.kind === 56 /* EqualsToken */ &&
-                parent_3.parent.kind === 202 /* ExpressionStatement */;
-            if (isSourceOfAssignmentExpressionStatement) {
-                return parent_3.parent.jsDocComment;
-            }
-            var isPropertyAssignmentExpression = parent_3 && parent_3.kind === 253 /* PropertyAssignment */;
-            if (isPropertyAssignmentExpression) {
-                return parent_3.jsDocComment;
-            }
-        }
-        return undefined;
-    }
-    function getJSDocTypeTag(node) {
-        return getJSDocTag(node, 277 /* JSDocTypeTag */, /*checkParentVariableStatement*/ false);
-    }
-    ts.getJSDocTypeTag = getJSDocTypeTag;
-    function getJSDocReturnTag(node) {
-        return getJSDocTag(node, 276 /* JSDocReturnTag */, /*checkParentVariableStatement*/ true);
-    }
-    ts.getJSDocReturnTag = getJSDocReturnTag;
-    function getJSDocTemplateTag(node) {
-        return getJSDocTag(node, 278 /* JSDocTemplateTag */, /*checkParentVariableStatement*/ false);
-    }
-    ts.getJSDocTemplateTag = getJSDocTemplateTag;
-    function getCorrespondingJSDocParameterTag(parameter) {
-        if (parameter.name && parameter.name.kind === 69 /* Identifier */) {
-            // If it's a parameter, see if the parent has a jsdoc comment with an @param
-            // annotation.
-            var parameterName = parameter.name.text;
-            var jsDocComment = getJSDocComment(parameter.parent, /*checkParentVariableStatement*/ true);
-            if (jsDocComment) {
-                for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-                    var tag = _a[_i];
-                    if (tag.kind === 275 /* JSDocParameterTag */) {
-                        var parameterTag = tag;
-                        var name_6 = parameterTag.preParameterName || parameterTag.postParameterName;
-                        if (name_6.text === parameterName) {
-                            return parameterTag;
-                        }
-                    }
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getCorrespondingJSDocParameterTag = getCorrespondingJSDocParameterTag;
-    function hasRestParameter(s) {
-        return isRestParameter(ts.lastOrUndefined(s.parameters));
-    }
-    ts.hasRestParameter = hasRestParameter;
-    function hasDeclaredRestParameter(s) {
-        return isDeclaredRestParam(ts.lastOrUndefined(s.parameters));
-    }
-    ts.hasDeclaredRestParameter = hasDeclaredRestParameter;
-    function isRestParameter(node) {
-        if (node && (node.flags & 134217728 /* JavaScriptFile */)) {
-            if (node.type && node.type.kind === 270 /* JSDocVariadicType */) {
-                return true;
-            }
-            var paramTag = getCorrespondingJSDocParameterTag(node);
-            if (paramTag && paramTag.typeExpression) {
-                return paramTag.typeExpression.type.kind === 270 /* JSDocVariadicType */;
-            }
-        }
-        return isDeclaredRestParam(node);
-    }
-    ts.isRestParameter = isRestParameter;
-    function isDeclaredRestParam(node) {
-        return node && node.dotDotDotToken !== undefined;
-    }
-    ts.isDeclaredRestParam = isDeclaredRestParam;
-    function isLiteralKind(kind) {
-        return 8 /* FirstLiteralToken */ <= kind && kind <= 11 /* LastLiteralToken */;
-    }
-    ts.isLiteralKind = isLiteralKind;
-    function isTextualLiteralKind(kind) {
-        return kind === 9 /* StringLiteral */ || kind === 11 /* NoSubstitutionTemplateLiteral */;
-    }
-    ts.isTextualLiteralKind = isTextualLiteralKind;
-    function isTemplateLiteralKind(kind) {
-        return 11 /* FirstTemplateToken */ <= kind && kind <= 14 /* LastTemplateToken */;
-    }
-    ts.isTemplateLiteralKind = isTemplateLiteralKind;
-    function isBindingPattern(node) {
-        return !!node && (node.kind === 168 /* ArrayBindingPattern */ || node.kind === 167 /* ObjectBindingPattern */);
-    }
-    ts.isBindingPattern = isBindingPattern;
-    // A node is an assignment target if it is on the left hand side of an '=' token, if it is parented by a property
-    // assignment in an object literal that is an assignment target, or if it is parented by an array literal that is
-    // an assignment target. Examples include 'a = xxx', '{ p: a } = xxx', '[{ p: a}] = xxx'.
-    function isAssignmentTarget(node) {
-        while (node.parent.kind === 178 /* ParenthesizedExpression */) {
-            node = node.parent;
-        }
-        while (true) {
-            var parent_4 = node.parent;
-            if (parent_4.kind === 170 /* ArrayLiteralExpression */ || parent_4.kind === 191 /* SpreadElementExpression */) {
-                node = parent_4;
-                continue;
-            }
-            if (parent_4.kind === 253 /* PropertyAssignment */ || parent_4.kind === 254 /* ShorthandPropertyAssignment */) {
-                node = parent_4.parent;
-                continue;
-            }
-            return parent_4.kind === 187 /* BinaryExpression */ &&
-                parent_4.operatorToken.kind === 56 /* EqualsToken */ &&
-                parent_4.left === node ||
-                (parent_4.kind === 207 /* ForInStatement */ || parent_4.kind === 208 /* ForOfStatement */) &&
-                    parent_4.initializer === node;
-        }
-    }
-    ts.isAssignmentTarget = isAssignmentTarget;
-    function isNodeDescendentOf(node, ancestor) {
-        while (node) {
-            if (node === ancestor)
-                return true;
-            node = node.parent;
-        }
-        return false;
-    }
-    ts.isNodeDescendentOf = isNodeDescendentOf;
-    function isInAmbientContext(node) {
-        while (node) {
-            if (node.flags & 2 /* Ambient */ || (node.kind === 256 /* SourceFile */ && node.isDeclarationFile)) {
-                return true;
-            }
-            node = node.parent;
-        }
-        return false;
-    }
-    ts.isInAmbientContext = isInAmbientContext;
-    function isDeclaration(node) {
-        switch (node.kind) {
-            case 180 /* ArrowFunction */:
-            case 169 /* BindingElement */:
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-            case 148 /* Constructor */:
-            case 224 /* EnumDeclaration */:
-            case 255 /* EnumMember */:
-            case 238 /* ExportSpecifier */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 149 /* GetAccessor */:
-            case 231 /* ImportClause */:
-            case 229 /* ImportEqualsDeclaration */:
-            case 234 /* ImportSpecifier */:
-            case 222 /* InterfaceDeclaration */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 225 /* ModuleDeclaration */:
-            case 232 /* NamespaceImport */:
-            case 142 /* Parameter */:
-            case 253 /* PropertyAssignment */:
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-            case 150 /* SetAccessor */:
-            case 254 /* ShorthandPropertyAssignment */:
-            case 223 /* TypeAliasDeclaration */:
-            case 141 /* TypeParameter */:
-            case 218 /* VariableDeclaration */:
-                return true;
-        }
-        return false;
-    }
-    ts.isDeclaration = isDeclaration;
-    function isStatement(n) {
-        switch (n.kind) {
-            case 210 /* BreakStatement */:
-            case 209 /* ContinueStatement */:
-            case 217 /* DebuggerStatement */:
-            case 204 /* DoStatement */:
-            case 202 /* ExpressionStatement */:
-            case 201 /* EmptyStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-            case 206 /* ForStatement */:
-            case 203 /* IfStatement */:
-            case 214 /* LabeledStatement */:
-            case 211 /* ReturnStatement */:
-            case 213 /* SwitchStatement */:
-            case 215 /* ThrowStatement */:
-            case 216 /* TryStatement */:
-            case 200 /* VariableStatement */:
-            case 205 /* WhileStatement */:
-            case 212 /* WithStatement */:
-            case 235 /* ExportAssignment */:
-                return true;
-            default:
-                return false;
-        }
-    }
-    ts.isStatement = isStatement;
-    function isClassElement(n) {
-        switch (n.kind) {
-            case 148 /* Constructor */:
-            case 145 /* PropertyDeclaration */:
-            case 147 /* MethodDeclaration */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 146 /* MethodSignature */:
-            case 153 /* IndexSignature */:
-                return true;
-            default:
-                return false;
-        }
-    }
-    ts.isClassElement = isClassElement;
-    // True if the given identifier, string literal, or number literal is the name of a declaration node
-    function isDeclarationName(name) {
-        if (name.kind !== 69 /* Identifier */ && name.kind !== 9 /* StringLiteral */ && name.kind !== 8 /* NumericLiteral */) {
-            return false;
-        }
-        var parent = name.parent;
-        if (parent.kind === 234 /* ImportSpecifier */ || parent.kind === 238 /* ExportSpecifier */) {
-            if (parent.propertyName) {
-                return true;
-            }
-        }
-        if (isDeclaration(parent)) {
-            return parent.name === name;
-        }
-        return false;
-    }
-    ts.isDeclarationName = isDeclarationName;
-    function isLiteralComputedPropertyDeclarationName(node) {
-        return (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) &&
-            node.parent.kind === 140 /* ComputedPropertyName */ &&
-            isDeclaration(node.parent.parent);
-    }
-    ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
-    // Return true if the given identifier is classified as an IdentifierName
-    function isIdentifierName(node) {
-        var parent = node.parent;
-        switch (parent.kind) {
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 255 /* EnumMember */:
-            case 253 /* PropertyAssignment */:
-            case 172 /* PropertyAccessExpression */:
-                // Name in member declaration or property name in property access
-                return parent.name === node;
-            case 139 /* QualifiedName */:
-                // Name on right hand side of dot in a type query
-                if (parent.right === node) {
-                    while (parent.kind === 139 /* QualifiedName */) {
-                        parent = parent.parent;
-                    }
-                    return parent.kind === 158 /* TypeQuery */;
-                }
-                return false;
-            case 169 /* BindingElement */:
-            case 234 /* ImportSpecifier */:
-                // Property name in binding element or import specifier
-                return parent.propertyName === node;
-            case 238 /* ExportSpecifier */:
-                // Any name in an export specifier
-                return true;
-        }
-        return false;
-    }
-    ts.isIdentifierName = isIdentifierName;
-    // An alias symbol is created by one of the following declarations:
-    // import <symbol> = ...
-    // import <symbol> from ...
-    // import * as <symbol> from ...
-    // import { x as <symbol> } from ...
-    // export { x as <symbol> } from ...
-    // export = ...
-    // export default ...
-    function isAliasSymbolDeclaration(node) {
-        return node.kind === 229 /* ImportEqualsDeclaration */ ||
-            node.kind === 228 /* NamespaceExportDeclaration */ ||
-            node.kind === 231 /* ImportClause */ && !!node.name ||
-            node.kind === 232 /* NamespaceImport */ ||
-            node.kind === 234 /* ImportSpecifier */ ||
-            node.kind === 238 /* ExportSpecifier */ ||
-            node.kind === 235 /* ExportAssignment */ && node.expression.kind === 69 /* Identifier */;
-    }
-    ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
-    function getClassExtendsHeritageClauseElement(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83 /* ExtendsKeyword */);
-        return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
-    }
-    ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
-    function getClassImplementsHeritageClauseElements(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 106 /* ImplementsKeyword */);
-        return heritageClause ? heritageClause.types : undefined;
-    }
-    ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
-    function getInterfaceBaseTypeNodes(node) {
-        var heritageClause = getHeritageClause(node.heritageClauses, 83 /* ExtendsKeyword */);
-        return heritageClause ? heritageClause.types : undefined;
-    }
-    ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
-    function getHeritageClause(clauses, kind) {
-        if (clauses) {
-            for (var _i = 0, clauses_1 = clauses; _i < clauses_1.length; _i++) {
-                var clause = clauses_1[_i];
-                if (clause.token === kind) {
-                    return clause;
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getHeritageClause = getHeritageClause;
-    function tryResolveScriptReference(host, sourceFile, reference) {
-        if (!host.getCompilerOptions().noResolve) {
-            var referenceFileName = ts.isRootedDiskPath(reference.fileName) ? reference.fileName : ts.combinePaths(ts.getDirectoryPath(sourceFile.fileName), reference.fileName);
-            return host.getSourceFile(referenceFileName);
-        }
-    }
-    ts.tryResolveScriptReference = tryResolveScriptReference;
-    function getAncestor(node, kind) {
-        while (node) {
-            if (node.kind === kind) {
-                return node;
-            }
-            node = node.parent;
-        }
-        return undefined;
-    }
-    ts.getAncestor = getAncestor;
-    function getFileReferenceFromReferencePath(comment, commentRange) {
-        var simpleReferenceRegEx = /^\/\/\/\s*<reference\s+/gim;
-        var isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
-        if (simpleReferenceRegEx.test(comment)) {
-            if (isNoDefaultLibRegEx.test(comment)) {
-                return {
-                    isNoDefaultLib: true
-                };
-            }
-            else {
-                var refMatchResult = ts.fullTripleSlashReferencePathRegEx.exec(comment);
-                var refLibResult = !refMatchResult && ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx.exec(comment);
-                if (refMatchResult || refLibResult) {
-                    var start = commentRange.pos;
-                    var end = commentRange.end;
-                    return {
-                        fileReference: {
-                            pos: start,
-                            end: end,
-                            fileName: (refMatchResult || refLibResult)[3]
-                        },
-                        isNoDefaultLib: false,
-                        isTypeReferenceDirective: !!refLibResult
-                    };
-                }
-                return {
-                    diagnosticMessage: ts.Diagnostics.Invalid_reference_directive_syntax,
-                    isNoDefaultLib: false
-                };
-            }
-        }
-        return undefined;
-    }
-    ts.getFileReferenceFromReferencePath = getFileReferenceFromReferencePath;
-    function isKeyword(token) {
-        return 70 /* FirstKeyword */ <= token && token <= 138 /* LastKeyword */;
-    }
-    ts.isKeyword = isKeyword;
-    function isTrivia(token) {
-        return 2 /* FirstTriviaToken */ <= token && token <= 7 /* LastTriviaToken */;
-    }
-    ts.isTrivia = isTrivia;
-    function isAsyncFunctionLike(node) {
-        return isFunctionLike(node) && (node.flags & 256 /* Async */) !== 0 && !isAccessor(node);
-    }
-    ts.isAsyncFunctionLike = isAsyncFunctionLike;
-    function isStringOrNumericLiteral(kind) {
-        return kind === 9 /* StringLiteral */ || kind === 8 /* NumericLiteral */;
-    }
-    ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
-    /**
-     * A declaration has a dynamic name if both of the following are true:
-     *   1. The declaration has a computed property name
-     *   2. The computed name is *not* expressed as Symbol.<name>, where name
-     *      is a property of the Symbol constructor that denotes a built in
-     *      Symbol.
-     */
-    function hasDynamicName(declaration) {
-        return declaration.name && isDynamicName(declaration.name);
-    }
-    ts.hasDynamicName = hasDynamicName;
-    function isDynamicName(name) {
-        return name.kind === 140 /* ComputedPropertyName */ &&
-            !isStringOrNumericLiteral(name.expression.kind) &&
-            !isWellKnownSymbolSyntactically(name.expression);
-    }
-    ts.isDynamicName = isDynamicName;
-    /**
-     * Checks if the expression is of the form:
-     *    Symbol.name
-     * where Symbol is literally the word "Symbol", and name is any identifierName
-     */
-    function isWellKnownSymbolSyntactically(node) {
-        return isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
-    }
-    ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
-    function getPropertyNameForPropertyNameNode(name) {
-        if (name.kind === 69 /* Identifier */ || name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */ || name.kind === 142 /* Parameter */) {
-            return name.text;
-        }
-        if (name.kind === 140 /* ComputedPropertyName */) {
-            var nameExpression = name.expression;
-            if (isWellKnownSymbolSyntactically(nameExpression)) {
-                var rightHandSideName = nameExpression.name.text;
-                return getPropertyNameForKnownSymbolName(rightHandSideName);
-            }
-            else if (nameExpression.kind === 9 /* StringLiteral */ || nameExpression.kind === 8 /* NumericLiteral */) {
-                return nameExpression.text;
-            }
-        }
-        return undefined;
-    }
-    ts.getPropertyNameForPropertyNameNode = getPropertyNameForPropertyNameNode;
-    function getPropertyNameForKnownSymbolName(symbolName) {
-        return "__@" + symbolName;
-    }
-    ts.getPropertyNameForKnownSymbolName = getPropertyNameForKnownSymbolName;
-    /**
-     * Includes the word "Symbol" with unicode escapes
-     */
-    function isESSymbolIdentifier(node) {
-        return node.kind === 69 /* Identifier */ && node.text === "Symbol";
-    }
-    ts.isESSymbolIdentifier = isESSymbolIdentifier;
-    function isModifierKind(token) {
-        switch (token) {
-            case 115 /* AbstractKeyword */:
-            case 118 /* AsyncKeyword */:
-            case 74 /* ConstKeyword */:
-            case 122 /* DeclareKeyword */:
-            case 77 /* DefaultKeyword */:
-            case 82 /* ExportKeyword */:
-            case 112 /* PublicKeyword */:
-            case 110 /* PrivateKeyword */:
-            case 111 /* ProtectedKeyword */:
-            case 128 /* ReadonlyKeyword */:
-            case 113 /* StaticKeyword */:
-                return true;
-        }
-        return false;
-    }
-    ts.isModifierKind = isModifierKind;
-    function isParameterDeclaration(node) {
-        var root = getRootDeclaration(node);
-        return root.kind === 142 /* Parameter */;
-    }
-    ts.isParameterDeclaration = isParameterDeclaration;
-    function getRootDeclaration(node) {
-        while (node.kind === 169 /* BindingElement */) {
-            node = node.parent.parent;
-        }
-        return node;
-    }
-    ts.getRootDeclaration = getRootDeclaration;
-    function nodeStartsNewLexicalEnvironment(n) {
-        return isFunctionLike(n) || n.kind === 225 /* ModuleDeclaration */ || n.kind === 256 /* SourceFile */;
-    }
-    ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
-    /**
-     * Creates a shallow, memberwise clone of a node. The "kind", "pos", "end", "flags", and "parent"
-     * properties are excluded by default, and can be provided via the "location", "flags", and
-     * "parent" parameters.
-     * @param node The node to clone.
-     * @param location An optional TextRange to use to supply the new position.
-     * @param flags The NodeFlags to use for the cloned node.
-     * @param parent The parent for the new node.
-     */
-    function cloneNode(node, location, flags, parent) {
-        // We don't use "clone" from core.ts here, as we need to preserve the prototype chain of
-        // the original node. We also need to exclude specific properties and only include own-
-        // properties (to skip members already defined on the shared prototype).
-        var clone = location !== undefined
-            ? ts.createNode(node.kind, location.pos, location.end)
-            : createSynthesizedNode(node.kind);
-        for (var key in node) {
-            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
-                continue;
-            }
-            clone[key] = node[key];
-        }
-        if (flags !== undefined) {
-            clone.flags = flags;
-        }
-        if (parent !== undefined) {
-            clone.parent = parent;
-        }
-        return clone;
-    }
-    ts.cloneNode = cloneNode;
-    /**
-     * Creates a deep clone of an EntityName, with new parent pointers.
-     * @param node The EntityName to clone.
-     * @param parent The parent for the cloned node.
-     */
-    function cloneEntityName(node, parent) {
-        var clone = cloneNode(node, node, node.flags, parent);
-        if (isQualifiedName(clone)) {
-            var left = clone.left, right = clone.right;
-            clone.left = cloneEntityName(left, clone);
-            clone.right = cloneNode(right, right, right.flags, parent);
-        }
-        return clone;
-    }
-    ts.cloneEntityName = cloneEntityName;
-    function isQualifiedName(node) {
-        return node.kind === 139 /* QualifiedName */;
-    }
-    ts.isQualifiedName = isQualifiedName;
-    function nodeIsSynthesized(node) {
-        return node.pos === -1;
-    }
-    ts.nodeIsSynthesized = nodeIsSynthesized;
-    function createSynthesizedNode(kind, startsOnNewLine) {
-        var node = ts.createNode(kind, /* pos */ -1, /* end */ -1);
-        node.startsOnNewLine = startsOnNewLine;
-        return node;
-    }
-    ts.createSynthesizedNode = createSynthesizedNode;
-    function createSynthesizedNodeArray() {
-        var array = [];
-        array.pos = -1;
-        array.end = -1;
-        return array;
-    }
-    ts.createSynthesizedNodeArray = createSynthesizedNodeArray;
-    function createDiagnosticCollection() {
-        var nonFileDiagnostics = [];
-        var fileDiagnostics = {};
-        var diagnosticsModified = false;
-        var modificationCount = 0;
-        return {
-            add: add,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getDiagnostics: getDiagnostics,
-            getModificationCount: getModificationCount,
-            reattachFileDiagnostics: reattachFileDiagnostics
-        };
-        function getModificationCount() {
-            return modificationCount;
-        }
-        function reattachFileDiagnostics(newFile) {
-            if (!ts.hasProperty(fileDiagnostics, newFile.fileName)) {
-                return;
-            }
-            for (var _i = 0, _a = fileDiagnostics[newFile.fileName]; _i < _a.length; _i++) {
-                var diagnostic = _a[_i];
-                diagnostic.file = newFile;
-            }
-        }
-        function add(diagnostic) {
-            var diagnostics;
-            if (diagnostic.file) {
-                diagnostics = fileDiagnostics[diagnostic.file.fileName];
-                if (!diagnostics) {
-                    diagnostics = [];
-                    fileDiagnostics[diagnostic.file.fileName] = diagnostics;
-                }
-            }
-            else {
-                diagnostics = nonFileDiagnostics;
-            }
-            diagnostics.push(diagnostic);
-            diagnosticsModified = true;
-            modificationCount++;
-        }
-        function getGlobalDiagnostics() {
-            sortAndDeduplicate();
-            return nonFileDiagnostics;
-        }
-        function getDiagnostics(fileName) {
-            sortAndDeduplicate();
-            if (fileName) {
-                return fileDiagnostics[fileName] || [];
-            }
-            var allDiagnostics = [];
-            function pushDiagnostic(d) {
-                allDiagnostics.push(d);
-            }
-            ts.forEach(nonFileDiagnostics, pushDiagnostic);
-            for (var key in fileDiagnostics) {
-                if (ts.hasProperty(fileDiagnostics, key)) {
-                    ts.forEach(fileDiagnostics[key], pushDiagnostic);
-                }
-            }
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function sortAndDeduplicate() {
-            if (!diagnosticsModified) {
-                return;
-            }
-            diagnosticsModified = false;
-            nonFileDiagnostics = ts.sortAndDeduplicateDiagnostics(nonFileDiagnostics);
-            for (var key in fileDiagnostics) {
-                if (ts.hasProperty(fileDiagnostics, key)) {
-                    fileDiagnostics[key] = ts.sortAndDeduplicateDiagnostics(fileDiagnostics[key]);
-                }
-            }
-        }
-    }
-    ts.createDiagnosticCollection = createDiagnosticCollection;
-    // This consists of the first 19 unprintable ASCII characters, canonical escapes, lineSeparator,
-    // paragraphSeparator, and nextLine. The latter three are just desirable to suppress new lines in
-    // the language service. These characters should be escaped when printing, and if any characters are added,
-    // the map below must be updated. Note that this regexp *does not* include the 'delete' character.
-    // There is no reason for this other than that JSON.stringify does not handle it either.
-    var escapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
-    var escapedCharsMap = {
-        "\0": "\\0",
-        "\t": "\\t",
-        "\v": "\\v",
-        "\f": "\\f",
-        "\b": "\\b",
-        "\r": "\\r",
-        "\n": "\\n",
-        "\\": "\\\\",
-        "\"": "\\\"",
-        "\u2028": "\\u2028",
-        "\u2029": "\\u2029",
-        "\u0085": "\\u0085" // nextLine
-    };
-    /**
-     * Based heavily on the abstract 'Quote'/'QuoteJSONString' operation from ECMA-262 (24.3.2.2),
-     * but augmented for a few select characters (e.g. lineSeparator, paragraphSeparator, nextLine)
-     * Note that this doesn't actually wrap the input in double quotes.
-     */
-    function escapeString(s) {
-        s = escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, getReplacement) : s;
-        return s;
-        function getReplacement(c) {
-            return escapedCharsMap[c] || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
-        }
-    }
-    ts.escapeString = escapeString;
-    function isIntrinsicJsxName(name) {
-        var ch = name.substr(0, 1);
-        return ch.toLowerCase() === ch;
-    }
-    ts.isIntrinsicJsxName = isIntrinsicJsxName;
-    function get16BitUnicodeEscapeSequence(charCode) {
-        var hexCharCode = charCode.toString(16).toUpperCase();
-        var paddedHexCode = ("0000" + hexCharCode).slice(-4);
-        return "\\u" + paddedHexCode;
-    }
-    var nonAsciiCharacters = /[^\u0000-\u007F]/g;
-    function escapeNonAsciiCharacters(s) {
-        // Replace non-ASCII characters with '\uNNNN' escapes if any exist.
-        // Otherwise just return the original string.
-        return nonAsciiCharacters.test(s) ?
-            s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
-            s;
-    }
-    ts.escapeNonAsciiCharacters = escapeNonAsciiCharacters;
-    var indentStrings = ["", "    "];
-    function getIndentString(level) {
-        if (indentStrings[level] === undefined) {
-            indentStrings[level] = getIndentString(level - 1) + indentStrings[1];
-        }
-        return indentStrings[level];
-    }
-    ts.getIndentString = getIndentString;
-    function getIndentSize() {
-        return indentStrings[1].length;
-    }
-    ts.getIndentSize = getIndentSize;
-    function createTextWriter(newLine) {
-        var output;
-        var indent;
-        var lineStart;
-        var lineCount;
-        var linePos;
-        function write(s) {
-            if (s && s.length) {
-                if (lineStart) {
-                    output += getIndentString(indent);
-                    lineStart = false;
-                }
-                output += s;
-            }
-        }
-        function reset() {
-            output = "";
-            indent = 0;
-            lineStart = true;
-            lineCount = 0;
-            linePos = 0;
-        }
-        function rawWrite(s) {
-            if (s !== undefined) {
-                if (lineStart) {
-                    lineStart = false;
-                }
-                output += s;
-            }
-        }
-        function writeLiteral(s) {
-            if (s && s.length) {
-                write(s);
-                var lineStartsOfS = ts.computeLineStarts(s);
-                if (lineStartsOfS.length > 1) {
-                    lineCount = lineCount + lineStartsOfS.length - 1;
-                    linePos = output.length - s.length + ts.lastOrUndefined(lineStartsOfS);
-                }
-            }
-        }
-        function writeLine() {
-            if (!lineStart) {
-                output += newLine;
-                lineCount++;
-                linePos = output.length;
-                lineStart = true;
-            }
-        }
-        function writeTextOfNode(text, node) {
-            write(getTextOfNodeFromSourceText(text, node));
-        }
-        reset();
-        return {
-            write: write,
-            rawWrite: rawWrite,
-            writeTextOfNode: writeTextOfNode,
-            writeLiteral: writeLiteral,
-            writeLine: writeLine,
-            increaseIndent: function () { indent++; },
-            decreaseIndent: function () { indent--; },
-            getIndent: function () { return indent; },
-            getTextPos: function () { return output.length; },
-            getLine: function () { return lineCount + 1; },
-            getColumn: function () { return lineStart ? indent * getIndentSize() + 1 : output.length - linePos + 1; },
-            getText: function () { return output; },
-            reset: reset
-        };
-    }
-    ts.createTextWriter = createTextWriter;
-    /**
-     * Resolves a local path to a path which is absolute to the base of the emit
-     */
-    function getExternalModuleNameFromPath(host, fileName) {
-        var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
-        var dir = ts.toPath(host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
-        var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
-        var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
-        return ts.removeFileExtension(relativePath);
-    }
-    ts.getExternalModuleNameFromPath = getExternalModuleNameFromPath;
-    function getOwnEmitOutputFilePath(sourceFile, host, extension) {
-        var compilerOptions = host.getCompilerOptions();
-        var emitOutputFilePathWithoutExtension;
-        if (compilerOptions.outDir) {
-            emitOutputFilePathWithoutExtension = ts.removeFileExtension(getSourceFilePathInNewDir(sourceFile, host, compilerOptions.outDir));
-        }
-        else {
-            emitOutputFilePathWithoutExtension = ts.removeFileExtension(sourceFile.fileName);
-        }
-        return emitOutputFilePathWithoutExtension + extension;
-    }
-    ts.getOwnEmitOutputFilePath = getOwnEmitOutputFilePath;
-    function getDeclarationEmitOutputFilePath(sourceFile, host) {
-        var options = host.getCompilerOptions();
-        var outputDir = options.declarationDir || options.outDir; // Prefer declaration folder if specified
-        if (options.declaration) {
-            var path = outputDir
-                ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
-                : sourceFile.fileName;
-            return ts.removeFileExtension(path) + ".d.ts";
-        }
-    }
-    ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
-    function getEmitScriptTarget(compilerOptions) {
-        return compilerOptions.target || 0 /* ES3 */;
-    }
-    ts.getEmitScriptTarget = getEmitScriptTarget;
-    function getEmitModuleKind(compilerOptions) {
-        return typeof compilerOptions.module === "number" ?
-            compilerOptions.module :
-            getEmitScriptTarget(compilerOptions) === 2 /* ES6 */ ? ts.ModuleKind.ES6 : ts.ModuleKind.CommonJS;
-    }
-    ts.getEmitModuleKind = getEmitModuleKind;
-    function forEachExpectedEmitFile(host, action, targetSourceFile) {
-        var options = host.getCompilerOptions();
-        // Emit on each source file
-        if (options.outFile || options.out) {
-            onBundledEmit(host);
-        }
-        else {
-            var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
-            for (var _i = 0, sourceFiles_1 = sourceFiles; _i < sourceFiles_1.length; _i++) {
-                var sourceFile = sourceFiles_1[_i];
-                if (!isDeclarationFile(sourceFile)) {
-                    onSingleFileEmit(host, sourceFile);
-                }
-            }
-        }
-        function onSingleFileEmit(host, sourceFile) {
-            // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
-            // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
-            // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
-            var extension = ".js";
-            if (options.jsx === 1 /* Preserve */) {
-                if (isSourceFileJavaScript(sourceFile)) {
-                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
-                        extension = ".jsx";
-                    }
-                }
-                else if (sourceFile.languageVariant === 1 /* JSX */) {
-                    // TypeScript source file preserving JSX syntax
-                    extension = ".jsx";
-                }
-            }
-            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
-            var emitFileNames = {
-                jsFilePath: jsFilePath,
-                sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                declarationFilePath: !isSourceFileJavaScript(sourceFile) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined
-            };
-            action(emitFileNames, [sourceFile], /*isBundledEmit*/ false);
-        }
-        function onBundledEmit(host) {
-            // Can emit only sources that are not declaration file and are either non module code or module with --module or --target es6 specified
-            var bundledSources = ts.filter(host.getSourceFiles(), function (sourceFile) {
-                return !isDeclarationFile(sourceFile) // Not a declaration file
-                    && (!ts.isExternalModule(sourceFile) || !!getEmitModuleKind(options));
-            }); // and not a module, unless module emit enabled
-            if (bundledSources.length) {
-                var jsFilePath = options.outFile || options.out;
-                var emitFileNames = {
-                    jsFilePath: jsFilePath,
-                    sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
-                    declarationFilePath: options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined
-                };
-                action(emitFileNames, bundledSources, /*isBundledEmit*/ true);
-            }
-        }
-        function getSourceMapFilePath(jsFilePath, options) {
-            return options.sourceMap ? jsFilePath + ".map" : undefined;
-        }
-    }
-    ts.forEachExpectedEmitFile = forEachExpectedEmitFile;
-    function getSourceFilePathInNewDir(sourceFile, host, newDirPath) {
-        var sourceFilePath = ts.getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
-        sourceFilePath = sourceFilePath.replace(host.getCommonSourceDirectory(), "");
-        return ts.combinePaths(newDirPath, sourceFilePath);
-    }
-    ts.getSourceFilePathInNewDir = getSourceFilePathInNewDir;
-    function writeFile(host, diagnostics, fileName, data, writeByteOrderMark, sourceFiles) {
-        host.writeFile(fileName, data, writeByteOrderMark, function (hostErrorMessage) {
-            diagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Could_not_write_file_0_Colon_1, fileName, hostErrorMessage));
-        }, sourceFiles);
-    }
-    ts.writeFile = writeFile;
-    function getLineOfLocalPosition(currentSourceFile, pos) {
-        return ts.getLineAndCharacterOfPosition(currentSourceFile, pos).line;
-    }
-    ts.getLineOfLocalPosition = getLineOfLocalPosition;
-    function getLineOfLocalPositionFromLineMap(lineMap, pos) {
-        return ts.computeLineAndCharacterOfPosition(lineMap, pos).line;
-    }
-    ts.getLineOfLocalPositionFromLineMap = getLineOfLocalPositionFromLineMap;
-    function getFirstConstructorWithBody(node) {
-        return ts.forEach(node.members, function (member) {
-            if (member.kind === 148 /* Constructor */ && nodeIsPresent(member.body)) {
-                return member;
-            }
-        });
-    }
-    ts.getFirstConstructorWithBody = getFirstConstructorWithBody;
-    function getSetAccessorTypeAnnotationNode(accessor) {
-        if (accessor && accessor.parameters.length > 0) {
-            var hasThis = accessor.parameters.length === 2 &&
-                accessor.parameters[0].name.kind === 69 /* Identifier */ &&
-                accessor.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */;
-            return accessor.parameters[hasThis ? 1 : 0].type;
-        }
-    }
-    ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
-    function getAllAccessorDeclarations(declarations, accessor) {
-        var firstAccessor;
-        var secondAccessor;
-        var getAccessor;
-        var setAccessor;
-        if (hasDynamicName(accessor)) {
-            firstAccessor = accessor;
-            if (accessor.kind === 149 /* GetAccessor */) {
-                getAccessor = accessor;
-            }
-            else if (accessor.kind === 150 /* SetAccessor */) {
-                setAccessor = accessor;
-            }
-            else {
-                ts.Debug.fail("Accessor has wrong kind");
-            }
-        }
-        else {
-            ts.forEach(declarations, function (member) {
-                if ((member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */)
-                    && (member.flags & 32 /* Static */) === (accessor.flags & 32 /* Static */)) {
-                    var memberName = getPropertyNameForPropertyNameNode(member.name);
-                    var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
-                    if (memberName === accessorName) {
-                        if (!firstAccessor) {
-                            firstAccessor = member;
-                        }
-                        else if (!secondAccessor) {
-                            secondAccessor = member;
-                        }
-                        if (member.kind === 149 /* GetAccessor */ && !getAccessor) {
-                            getAccessor = member;
-                        }
-                        if (member.kind === 150 /* SetAccessor */ && !setAccessor) {
-                            setAccessor = member;
-                        }
-                    }
-                }
-            });
-        }
-        return {
-            firstAccessor: firstAccessor,
-            secondAccessor: secondAccessor,
-            getAccessor: getAccessor,
-            setAccessor: setAccessor
-        };
-    }
-    ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
-    function emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments) {
-        // If the leading comments start on different line than the start of node, write new line
-        if (leadingComments && leadingComments.length && node.pos !== leadingComments[0].pos &&
-            getLineOfLocalPositionFromLineMap(lineMap, node.pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
-            writer.writeLine();
-        }
-    }
-    ts.emitNewLineBeforeLeadingComments = emitNewLineBeforeLeadingComments;
-    function emitComments(text, lineMap, writer, comments, trailingSeparator, newLine, writeComment) {
-        var emitLeadingSpace = !trailingSeparator;
-        ts.forEach(comments, function (comment) {
-            if (emitLeadingSpace) {
-                writer.write(" ");
-                emitLeadingSpace = false;
-            }
-            writeComment(text, lineMap, writer, comment, newLine);
-            if (comment.hasTrailingNewLine) {
-                writer.writeLine();
-            }
-            else if (trailingSeparator) {
-                writer.write(" ");
-            }
-            else {
-                // Emit leading space to separate comment during next comment emit
-                emitLeadingSpace = true;
-            }
-        });
-    }
-    ts.emitComments = emitComments;
-    /**
-     * Detached comment is a comment at the top of file or function body that is separated from
-     * the next statement by space.
-     */
-    function emitDetachedComments(text, lineMap, writer, writeComment, node, newLine, removeComments) {
-        var leadingComments;
-        var currentDetachedCommentInfo;
-        if (removeComments) {
-            // removeComments is true, only reserve pinned comment at the top of file
-            // For example:
-            //      /*! Pinned Comment */
-            //
-            //      var x = 10;
-            if (node.pos === 0) {
-                leadingComments = ts.filter(ts.getLeadingCommentRanges(text, node.pos), isPinnedComment);
-            }
-        }
-        else {
-            // removeComments is false, just get detached as normal and bypass the process to filter comment
-            leadingComments = ts.getLeadingCommentRanges(text, node.pos);
-        }
-        if (leadingComments) {
-            var detachedComments = [];
-            var lastComment = void 0;
-            for (var _i = 0, leadingComments_1 = leadingComments; _i < leadingComments_1.length; _i++) {
-                var comment = leadingComments_1[_i];
-                if (lastComment) {
-                    var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, lastComment.end);
-                    var commentLine = getLineOfLocalPositionFromLineMap(lineMap, comment.pos);
-                    if (commentLine >= lastCommentLine + 2) {
-                        // There was a blank line between the last comment and this comment.  This
-                        // comment is not part of the copyright comments.  Return what we have so
-                        // far.
-                        break;
-                    }
-                }
-                detachedComments.push(comment);
-                lastComment = comment;
-            }
-            if (detachedComments.length) {
-                // All comments look like they could have been part of the copyright header.  Make
-                // sure there is at least one blank line between it and the node.  If not, it's not
-                // a copyright header.
-                var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, ts.lastOrUndefined(detachedComments).end);
-                var nodeLine = getLineOfLocalPositionFromLineMap(lineMap, ts.skipTrivia(text, node.pos));
-                if (nodeLine >= lastCommentLine + 2) {
-                    // Valid detachedComments
-                    emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments);
-                    emitComments(text, lineMap, writer, detachedComments, /*trailingSeparator*/ true, newLine, writeComment);
-                    currentDetachedCommentInfo = { nodePos: node.pos, detachedCommentEndPos: ts.lastOrUndefined(detachedComments).end };
-                }
-            }
-        }
-        return currentDetachedCommentInfo;
-        function isPinnedComment(comment) {
-            return text.charCodeAt(comment.pos + 1) === 42 /* asterisk */ &&
-                text.charCodeAt(comment.pos + 2) === 33 /* exclamation */;
-        }
-    }
-    ts.emitDetachedComments = emitDetachedComments;
-    function writeCommentRange(text, lineMap, writer, comment, newLine) {
-        if (text.charCodeAt(comment.pos + 1) === 42 /* asterisk */) {
-            var firstCommentLineAndCharacter = ts.computeLineAndCharacterOfPosition(lineMap, comment.pos);
-            var lineCount = lineMap.length;
-            var firstCommentLineIndent = void 0;
-            for (var pos = comment.pos, currentLine = firstCommentLineAndCharacter.line; pos < comment.end; currentLine++) {
-                var nextLineStart = (currentLine + 1) === lineCount
-                    ? text.length + 1
-                    : lineMap[currentLine + 1];
-                if (pos !== comment.pos) {
-                    // If we are not emitting first line, we need to write the spaces to adjust the alignment
-                    if (firstCommentLineIndent === undefined) {
-                        firstCommentLineIndent = calculateIndent(text, lineMap[firstCommentLineAndCharacter.line], comment.pos);
-                    }
-                    // These are number of spaces writer is going to write at current indent
-                    var currentWriterIndentSpacing = writer.getIndent() * getIndentSize();
-                    // Number of spaces we want to be writing
-                    // eg: Assume writer indent
-                    // module m {
-                    //         /* starts at character 9 this is line 1
-                    //    * starts at character pos 4 line                        --1  = 8 - 8 + 3
-                    //   More left indented comment */                            --2  = 8 - 8 + 2
-                    //     class c { }
-                    // }
-                    // module m {
-                    //     /* this is line 1 -- Assume current writer indent 8
-                    //      * line                                                --3 = 8 - 4 + 5
-                    //            More right indented comment */                  --4 = 8 - 4 + 11
-                    //     class c { }
-                    // }
-                    var spacesToEmit = currentWriterIndentSpacing - firstCommentLineIndent + calculateIndent(text, pos, nextLineStart);
-                    if (spacesToEmit > 0) {
-                        var numberOfSingleSpacesToEmit = spacesToEmit % getIndentSize();
-                        var indentSizeSpaceString = getIndentString((spacesToEmit - numberOfSingleSpacesToEmit) / getIndentSize());
-                        // Write indent size string ( in eg 1: = "", 2: "" , 3: string with 8 spaces 4: string with 12 spaces
-                        writer.rawWrite(indentSizeSpaceString);
-                        // Emit the single spaces (in eg: 1: 3 spaces, 2: 2 spaces, 3: 1 space, 4: 3 spaces)
-                        while (numberOfSingleSpacesToEmit) {
-                            writer.rawWrite(" ");
-                            numberOfSingleSpacesToEmit--;
-                        }
-                    }
-                    else {
-                        // No spaces to emit write empty string
-                        writer.rawWrite("");
-                    }
-                }
-                // Write the comment line text
-                writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart);
-                pos = nextLineStart;
-            }
-        }
-        else {
-            // Single line comment of style //....
-            writer.write(text.substring(comment.pos, comment.end));
-        }
-    }
-    ts.writeCommentRange = writeCommentRange;
-    function writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart) {
-        var end = Math.min(comment.end, nextLineStart - 1);
-        var currentLineText = text.substring(pos, end).replace(/^\s+|\s+$/g, "");
-        if (currentLineText) {
-            // trimmed forward and ending spaces text
-            writer.write(currentLineText);
-            if (end !== comment.end) {
-                writer.writeLine();
-            }
-        }
-        else {
-            // Empty string - make sure we write empty line
-            writer.writeLiteral(newLine);
-        }
-    }
-    function calculateIndent(text, pos, end) {
-        var currentLineIndent = 0;
-        for (; pos < end && ts.isWhiteSpace(text.charCodeAt(pos)); pos++) {
-            if (text.charCodeAt(pos) === 9 /* tab */) {
-                // Tabs = TabSize = indent size and go to next tabStop
-                currentLineIndent += getIndentSize() - (currentLineIndent % getIndentSize());
-            }
-            else {
-                // Single space
-                currentLineIndent++;
-            }
-        }
-        return currentLineIndent;
-    }
-    function modifierToFlag(token) {
-        switch (token) {
-            case 113 /* StaticKeyword */: return 32 /* Static */;
-            case 112 /* PublicKeyword */: return 4 /* Public */;
-            case 111 /* ProtectedKeyword */: return 16 /* Protected */;
-            case 110 /* PrivateKeyword */: return 8 /* Private */;
-            case 115 /* AbstractKeyword */: return 128 /* Abstract */;
-            case 82 /* ExportKeyword */: return 1 /* Export */;
-            case 122 /* DeclareKeyword */: return 2 /* Ambient */;
-            case 74 /* ConstKeyword */: return 2048 /* Const */;
-            case 77 /* DefaultKeyword */: return 512 /* Default */;
-            case 118 /* AsyncKeyword */: return 256 /* Async */;
-            case 128 /* ReadonlyKeyword */: return 64 /* Readonly */;
-        }
-        return 0;
-    }
-    ts.modifierToFlag = modifierToFlag;
-    function isLeftHandSideExpression(expr) {
-        if (expr) {
-            switch (expr.kind) {
-                case 172 /* PropertyAccessExpression */:
-                case 173 /* ElementAccessExpression */:
-                case 175 /* NewExpression */:
-                case 174 /* CallExpression */:
-                case 196 /* NonNullExpression */:
-                case 241 /* JsxElement */:
-                case 242 /* JsxSelfClosingElement */:
-                case 176 /* TaggedTemplateExpression */:
-                case 170 /* ArrayLiteralExpression */:
-                case 178 /* ParenthesizedExpression */:
-                case 171 /* ObjectLiteralExpression */:
-                case 192 /* ClassExpression */:
-                case 179 /* FunctionExpression */:
-                case 69 /* Identifier */:
-                case 10 /* RegularExpressionLiteral */:
-                case 8 /* NumericLiteral */:
-                case 9 /* StringLiteral */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                case 189 /* TemplateExpression */:
-                case 84 /* FalseKeyword */:
-                case 93 /* NullKeyword */:
-                case 97 /* ThisKeyword */:
-                case 99 /* TrueKeyword */:
-                case 95 /* SuperKeyword */:
-                    return true;
-            }
-        }
-        return false;
-    }
-    ts.isLeftHandSideExpression = isLeftHandSideExpression;
-    function isAssignmentOperator(token) {
-        return token >= 56 /* FirstAssignment */ && token <= 68 /* LastAssignment */;
-    }
-    ts.isAssignmentOperator = isAssignmentOperator;
-    function isExpressionWithTypeArgumentsInClassExtendsClause(node) {
-        return node.kind === 194 /* ExpressionWithTypeArguments */ &&
-            node.parent.token === 83 /* ExtendsKeyword */ &&
-            isClassLike(node.parent.parent);
-    }
-    ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
-    // Returns false if this heritage clause element's expression contains something unsupported
-    // (i.e. not a name or dotted name).
-    function isSupportedExpressionWithTypeArguments(node) {
-        return isSupportedExpressionWithTypeArgumentsRest(node.expression);
-    }
-    ts.isSupportedExpressionWithTypeArguments = isSupportedExpressionWithTypeArguments;
-    function isSupportedExpressionWithTypeArgumentsRest(node) {
-        if (node.kind === 69 /* Identifier */) {
-            return true;
-        }
-        else if (isPropertyAccessExpression(node)) {
-            return isSupportedExpressionWithTypeArgumentsRest(node.expression);
-        }
-        else {
-            return false;
-        }
-    }
-    function isRightSideOfQualifiedNameOrPropertyAccess(node) {
-        return (node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node) ||
-            (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node);
-    }
-    ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
-    function isEmptyObjectLiteralOrArrayLiteral(expression) {
-        var kind = expression.kind;
-        if (kind === 171 /* ObjectLiteralExpression */) {
-            return expression.properties.length === 0;
-        }
-        if (kind === 170 /* ArrayLiteralExpression */) {
-            return expression.elements.length === 0;
-        }
-        return false;
-    }
-    ts.isEmptyObjectLiteralOrArrayLiteral = isEmptyObjectLiteralOrArrayLiteral;
-    function getLocalSymbolForExportDefault(symbol) {
-        return symbol && symbol.valueDeclaration && (symbol.valueDeclaration.flags & 512 /* Default */) ? symbol.valueDeclaration.localSymbol : undefined;
-    }
-    ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
-    function hasJavaScriptFileExtension(fileName) {
-        return ts.forEach(ts.supportedJavascriptExtensions, function (extension) { return ts.fileExtensionIs(fileName, extension); });
-    }
-    ts.hasJavaScriptFileExtension = hasJavaScriptFileExtension;
-    /**
-     * Replace each instance of non-ascii characters by one, two, three, or four escape sequences
-     * representing the UTF-8 encoding of the character, and return the expanded char code list.
-     */
-    function getExpandedCharCodes(input) {
-        var output = [];
-        var length = input.length;
-        for (var i = 0; i < length; i++) {
-            var charCode = input.charCodeAt(i);
-            // handel utf8
-            if (charCode < 0x80) {
-                output.push(charCode);
-            }
-            else if (charCode < 0x800) {
-                output.push((charCode >> 6) | 192);
-                output.push((charCode & 63) | 128);
-            }
-            else if (charCode < 0x10000) {
-                output.push((charCode >> 12) | 224);
-                output.push(((charCode >> 6) & 63) | 128);
-                output.push((charCode & 63) | 128);
-            }
-            else if (charCode < 0x20000) {
-                output.push((charCode >> 18) | 240);
-                output.push(((charCode >> 12) & 63) | 128);
-                output.push(((charCode >> 6) & 63) | 128);
-                output.push((charCode & 63) | 128);
-            }
-            else {
-                ts.Debug.assert(false, "Unexpected code point");
-            }
-        }
-        return output;
-    }
-    /**
-     * Serialize an object graph into a JSON string. This is intended only for use on an acyclic graph
-     * as the fallback implementation does not check for circular references by default.
-     */
-    ts.stringify = typeof JSON !== "undefined" && JSON.stringify
-        ? JSON.stringify
-        : stringifyFallback;
-    /**
-     * Serialize an object graph into a JSON string.
-     */
-    function stringifyFallback(value) {
-        // JSON.stringify returns `undefined` here, instead of the string "undefined".
-        return value === undefined ? undefined : stringifyValue(value);
-    }
-    function stringifyValue(value) {
-        return typeof value === "string" ? "\"" + escapeString(value) + "\""
-            : typeof value === "number" ? isFinite(value) ? String(value) : "null"
-                : typeof value === "boolean" ? value ? "true" : "false"
-                    : typeof value === "object" && value ? ts.isArray(value) ? cycleCheck(stringifyArray, value) : cycleCheck(stringifyObject, value)
-                        : "null";
-    }
-    function cycleCheck(cb, value) {
-        ts.Debug.assert(!value.hasOwnProperty("__cycle"), "Converting circular structure to JSON");
-        value.__cycle = true;
-        var result = cb(value);
-        delete value.__cycle;
-        return result;
-    }
-    function stringifyArray(value) {
-        return "[" + ts.reduceLeft(value, stringifyElement, "") + "]";
-    }
-    function stringifyElement(memo, value) {
-        return (memo ? memo + "," : memo) + stringifyValue(value);
-    }
-    function stringifyObject(value) {
-        return "{" + ts.reduceProperties(value, stringifyProperty, "") + "}";
-    }
-    function stringifyProperty(memo, value, key) {
-        return value === undefined || typeof value === "function" || key === "__cycle" ? memo
-            : (memo ? memo + "," : memo) + ("\"" + escapeString(key) + "\":" + stringifyValue(value));
-    }
-    var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
-    /**
-     * Converts a string to a base-64 encoded ASCII string.
-     */
-    function convertToBase64(input) {
-        var result = "";
-        var charCodes = getExpandedCharCodes(input);
-        var i = 0;
-        var length = charCodes.length;
-        var byte1, byte2, byte3, byte4;
-        while (i < length) {
-            // Convert every 6-bits in the input 3 character points
-            // into a base64 digit
-            byte1 = charCodes[i] >> 2;
-            byte2 = (charCodes[i] & 3) << 4 | charCodes[i + 1] >> 4;
-            byte3 = (charCodes[i + 1] & 15) << 2 | charCodes[i + 2] >> 6;
-            byte4 = charCodes[i + 2] & 63;
-            // We are out of characters in the input, set the extra
-            // digits to 64 (padding character).
-            if (i + 1 >= length) {
-                byte3 = byte4 = 64;
-            }
-            else if (i + 2 >= length) {
-                byte4 = 64;
-            }
-            // Write to the output
-            result += base64Digits.charAt(byte1) + base64Digits.charAt(byte2) + base64Digits.charAt(byte3) + base64Digits.charAt(byte4);
-            i += 3;
-        }
-        return result;
-    }
-    ts.convertToBase64 = convertToBase64;
-    function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
-        return !ts.isRootedDiskPath(absoluteOrRelativePath)
-            ? absoluteOrRelativePath
-            : ts.getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, /* isAbsolutePathAnUrl */ false);
-    }
-    ts.convertToRelativePath = convertToRelativePath;
-    var carriageReturnLineFeed = "\r\n";
-    var lineFeed = "\n";
-    function getNewLineCharacter(options) {
-        if (options.newLine === 0 /* CarriageReturnLineFeed */) {
-            return carriageReturnLineFeed;
-        }
-        else if (options.newLine === 1 /* LineFeed */) {
-            return lineFeed;
-        }
-        else if (ts.sys) {
-            return ts.sys.newLine;
-        }
-        return carriageReturnLineFeed;
-    }
-    ts.getNewLineCharacter = getNewLineCharacter;
-    function isWatchSet(options) {
-        // Firefox has Object.prototype.watch
-        return options.watch && options.hasOwnProperty("watch");
-    }
-    ts.isWatchSet = isWatchSet;
-})(ts || (ts = {}));
-var ts;
-(function (ts) {
-    function getDefaultLibFileName(options) {
-        return options.target === 2 /* ES6 */ ? "lib.es6.d.ts" : "lib.d.ts";
-    }
-    ts.getDefaultLibFileName = getDefaultLibFileName;
-    function textSpanEnd(span) {
-        return span.start + span.length;
-    }
-    ts.textSpanEnd = textSpanEnd;
-    function textSpanIsEmpty(span) {
-        return span.length === 0;
-    }
-    ts.textSpanIsEmpty = textSpanIsEmpty;
-    function textSpanContainsPosition(span, position) {
-        return position >= span.start && position < textSpanEnd(span);
-    }
-    ts.textSpanContainsPosition = textSpanContainsPosition;
-    // Returns true if 'span' contains 'other'.
-    function textSpanContainsTextSpan(span, other) {
-        return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
-    }
-    ts.textSpanContainsTextSpan = textSpanContainsTextSpan;
-    function textSpanOverlapsWith(span, other) {
-        var overlapStart = Math.max(span.start, other.start);
-        var overlapEnd = Math.min(textSpanEnd(span), textSpanEnd(other));
-        return overlapStart < overlapEnd;
-    }
-    ts.textSpanOverlapsWith = textSpanOverlapsWith;
-    function textSpanOverlap(span1, span2) {
-        var overlapStart = Math.max(span1.start, span2.start);
-        var overlapEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
-        if (overlapStart < overlapEnd) {
-            return createTextSpanFromBounds(overlapStart, overlapEnd);
-        }
-        return undefined;
-    }
-    ts.textSpanOverlap = textSpanOverlap;
-    function textSpanIntersectsWithTextSpan(span, other) {
-        return other.start <= textSpanEnd(span) && textSpanEnd(other) >= span.start;
-    }
-    ts.textSpanIntersectsWithTextSpan = textSpanIntersectsWithTextSpan;
-    function textSpanIntersectsWith(span, start, length) {
-        var end = start + length;
-        return start <= textSpanEnd(span) && end >= span.start;
-    }
-    ts.textSpanIntersectsWith = textSpanIntersectsWith;
-    function decodedTextSpanIntersectsWith(start1, length1, start2, length2) {
-        var end1 = start1 + length1;
-        var end2 = start2 + length2;
-        return start2 <= end1 && end2 >= start1;
-    }
-    ts.decodedTextSpanIntersectsWith = decodedTextSpanIntersectsWith;
-    function textSpanIntersectsWithPosition(span, position) {
-        return position <= textSpanEnd(span) && position >= span.start;
-    }
-    ts.textSpanIntersectsWithPosition = textSpanIntersectsWithPosition;
-    function textSpanIntersection(span1, span2) {
-        var intersectStart = Math.max(span1.start, span2.start);
-        var intersectEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
-        if (intersectStart <= intersectEnd) {
-            return createTextSpanFromBounds(intersectStart, intersectEnd);
-        }
-        return undefined;
-    }
-    ts.textSpanIntersection = textSpanIntersection;
-    function createTextSpan(start, length) {
-        if (start < 0) {
-            throw new Error("start < 0");
-        }
-        if (length < 0) {
-            throw new Error("length < 0");
-        }
-        return { start: start, length: length };
-    }
-    ts.createTextSpan = createTextSpan;
-    function createTextSpanFromBounds(start, end) {
-        return createTextSpan(start, end - start);
-    }
-    ts.createTextSpanFromBounds = createTextSpanFromBounds;
-    function textChangeRangeNewSpan(range) {
-        return createTextSpan(range.span.start, range.newLength);
-    }
-    ts.textChangeRangeNewSpan = textChangeRangeNewSpan;
-    function textChangeRangeIsUnchanged(range) {
-        return textSpanIsEmpty(range.span) && range.newLength === 0;
-    }
-    ts.textChangeRangeIsUnchanged = textChangeRangeIsUnchanged;
-    function createTextChangeRange(span, newLength) {
-        if (newLength < 0) {
-            throw new Error("newLength < 0");
-        }
-        return { span: span, newLength: newLength };
-    }
-    ts.createTextChangeRange = createTextChangeRange;
-    ts.unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
-    /**
-     * Called to merge all the changes that occurred across several versions of a script snapshot
-     * into a single change.  i.e. if a user keeps making successive edits to a script we will
-     * have a text change from V1 to V2, V2 to V3, ..., Vn.
-     *
-     * This function will then merge those changes into a single change range valid between V1 and
-     * Vn.
-     */
-    function collapseTextChangeRangesAcrossMultipleVersions(changes) {
-        if (changes.length === 0) {
-            return ts.unchangedTextChangeRange;
-        }
-        if (changes.length === 1) {
-            return changes[0];
-        }
-        // We change from talking about { { oldStart, oldLength }, newLength } to { oldStart, oldEnd, newEnd }
-        // as it makes things much easier to reason about.
-        var change0 = changes[0];
-        var oldStartN = change0.span.start;
-        var oldEndN = textSpanEnd(change0.span);
-        var newEndN = oldStartN + change0.newLength;
-        for (var i = 1; i < changes.length; i++) {
-            var nextChange = changes[i];
-            // Consider the following case:
-            // i.e. two edits.  The first represents the text change range { { 10, 50 }, 30 }.  i.e. The span starting
-            // at 10, with length 50 is reduced to length 30.  The second represents the text change range { { 30, 30 }, 40 }.
-            // i.e. the span starting at 30 with length 30 is increased to length 40.
-            //
-            //      0         10        20        30        40        50        60        70        80        90        100
-            //      -------------------------------------------------------------------------------------------------------
-            //                |                                                 /
-            //                |                                            /----
-            //  T1            |                                       /----
-            //                |                                  /----
-            //                |                             /----
-            //      -------------------------------------------------------------------------------------------------------
-            //                                     |                            \
-            //                                     |                               \
-            //   T2                                |                                 \
-            //                                     |                                   \
-            //                                     |                                      \
-            //      -------------------------------------------------------------------------------------------------------
-            //
-            // Merging these turns out to not be too difficult.  First, determining the new start of the change is trivial
-            // it's just the min of the old and new starts.  i.e.:
-            //
-            //      0         10        20        30        40        50        60        70        80        90        100
-            //      ------------------------------------------------------------*------------------------------------------
-            //                |                                                 /
-            //                |                                            /----
-            //  T1            |                                       /----
-            //                |                                  /----
-            //                |                             /----
-            //      ----------------------------------------$-------------------$------------------------------------------
-            //                .                    |                            \
-            //                .                    |                               \
-            //   T2           .                    |                                 \
-            //                .                    |                                   \
-            //                .                    |                                      \
-            //      ----------------------------------------------------------------------*--------------------------------
-            //
-            // (Note the dots represent the newly inferred start.
-            // Determining the new and old end is also pretty simple.  Basically it boils down to paying attention to the
-            // absolute positions at the asterisks, and the relative change between the dollar signs. Basically, we see
-            // which if the two $'s precedes the other, and we move that one forward until they line up.  in this case that
-            // means:
-            //
-            //      0         10        20        30        40        50        60        70        80        90        100
-            //      --------------------------------------------------------------------------------*----------------------
-            //                |                                                                     /
-            //                |                                                                /----
-            //  T1            |                                                           /----
-            //                |                                                      /----
-            //                |                                                 /----
-            //      ------------------------------------------------------------$------------------------------------------
-            //                .                    |                            \
-            //                .                    |                               \
-            //   T2           .                    |                                 \
-            //                .                    |                                   \
-            //                .                    |                                      \
-            //      ----------------------------------------------------------------------*--------------------------------
-            //
-            // In other words (in this case), we're recognizing that the second edit happened after where the first edit
-            // ended with a delta of 20 characters (60 - 40).  Thus, if we go back in time to where the first edit started
-            // that's the same as if we started at char 80 instead of 60.
-            //
-            // As it so happens, the same logic applies if the second edit precedes the first edit.  In that case rather
-            // than pushing the first edit forward to match the second, we'll push the second edit forward to match the
-            // first.
-            //
-            // In this case that means we have { oldStart: 10, oldEnd: 80, newEnd: 70 } or, in TextChangeRange
-            // semantics: { { start: 10, length: 70 }, newLength: 60 }
-            //
-            // The math then works out as follows.
-            // If we have { oldStart1, oldEnd1, newEnd1 } and { oldStart2, oldEnd2, newEnd2 } then we can compute the
-            // final result like so:
-            //
-            // {
-            //      oldStart3: Min(oldStart1, oldStart2),
-            //      oldEnd3  : Max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1)),
-            //      newEnd3  : Max(newEnd2, newEnd2 + (newEnd1 - oldEnd2))
-            // }
-            var oldStart1 = oldStartN;
-            var oldEnd1 = oldEndN;
-            var newEnd1 = newEndN;
-            var oldStart2 = nextChange.span.start;
-            var oldEnd2 = textSpanEnd(nextChange.span);
-            var newEnd2 = oldStart2 + nextChange.newLength;
-            oldStartN = Math.min(oldStart1, oldStart2);
-            oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
-            newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
-        }
-        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), /*newLength:*/ newEndN - oldStartN);
-    }
-    ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
-    function getTypeParameterOwner(d) {
-        if (d && d.kind === 141 /* TypeParameter */) {
-            for (var current = d; current; current = current.parent) {
-                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 222 /* InterfaceDeclaration */) {
-                    return current;
-                }
-            }
-        }
-    }
-    ts.getTypeParameterOwner = getTypeParameterOwner;
-    function isParameterPropertyDeclaration(node) {
-        return node.flags & 92 /* ParameterPropertyModifier */ && node.parent.kind === 148 /* Constructor */ && ts.isClassLike(node.parent.parent);
-    }
-    ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
-    function startsWith(str, prefix) {
-        return str.lastIndexOf(prefix, 0) === 0;
-    }
-    ts.startsWith = startsWith;
-    function endsWith(str, suffix) {
-        var expectedPos = str.length - suffix.length;
-        return str.indexOf(suffix, expectedPos) === expectedPos;
-    }
-    ts.endsWith = endsWith;
-})(ts || (ts = {}));
-/// <reference path="utilities.ts"/>
-/// <reference path="scanner.ts"/>
-var ts;
-(function (ts) {
-    /* @internal */ ts.parseTime = 0;
-    var NodeConstructor;
-    var SourceFileConstructor;
-    function createNode(kind, pos, end) {
-        if (kind === 256 /* SourceFile */) {
-            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
-        }
-        else {
-            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
-        }
-    }
-    ts.createNode = createNode;
-    function visitNode(cbNode, node) {
-        if (node) {
-            return cbNode(node);
-        }
-    }
-    function visitNodeArray(cbNodes, nodes) {
-        if (nodes) {
-            return cbNodes(nodes);
-        }
-    }
-    function visitEachNode(cbNode, nodes) {
-        if (nodes) {
-            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
-                var node = nodes_1[_i];
-                var result = cbNode(node);
-                if (result) {
-                    return result;
-                }
-            }
-        }
-    }
-    // Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
-    // stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
-    // embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
-    // a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
-    function forEachChild(node, cbNode, cbNodeArray) {
-        if (!node) {
-            return;
-        }
-        // The visitXXX functions could be written as local functions that close over the cbNode and cbNodeArray
-        // callback parameters, but that causes a closure allocation for each invocation with noticeable effects
-        // on performance.
-        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
-        var cbNodes = cbNodeArray || cbNode;
-        switch (node.kind) {
-            case 139 /* QualifiedName */:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.right);
-            case 141 /* TypeParameter */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.constraint) ||
-                    visitNode(cbNode, node.expression);
-            case 254 /* ShorthandPropertyAssignment */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.equalsToken) ||
-                    visitNode(cbNode, node.objectAssignmentInitializer);
-            case 142 /* Parameter */:
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-            case 253 /* PropertyAssignment */:
-            case 218 /* VariableDeclaration */:
-            case 169 /* BindingElement */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.dotDotDotToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.initializer);
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
-            case 151 /* CallSignature */:
-            case 152 /* ConstructSignature */:
-            case 153 /* IndexSignature */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 179 /* FunctionExpression */:
-            case 220 /* FunctionDeclaration */:
-            case 180 /* ArrowFunction */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.equalsGreaterThanToken) ||
-                    visitNode(cbNode, node.body);
-            case 155 /* TypeReference */:
-                return visitNode(cbNode, node.typeName) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 154 /* TypePredicate */:
-                return visitNode(cbNode, node.parameterName) ||
-                    visitNode(cbNode, node.type);
-            case 158 /* TypeQuery */:
-                return visitNode(cbNode, node.exprName);
-            case 159 /* TypeLiteral */:
-                return visitNodes(cbNodes, node.members);
-            case 160 /* ArrayType */:
-                return visitNode(cbNode, node.elementType);
-            case 161 /* TupleType */:
-                return visitNodes(cbNodes, node.elementTypes);
-            case 162 /* UnionType */:
-            case 163 /* IntersectionType */:
-                return visitNodes(cbNodes, node.types);
-            case 164 /* ParenthesizedType */:
-                return visitNode(cbNode, node.type);
-            case 167 /* ObjectBindingPattern */:
-            case 168 /* ArrayBindingPattern */:
-                return visitNodes(cbNodes, node.elements);
-            case 170 /* ArrayLiteralExpression */:
-                return visitNodes(cbNodes, node.elements);
-            case 171 /* ObjectLiteralExpression */:
-                return visitNodes(cbNodes, node.properties);
-            case 172 /* PropertyAccessExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.dotToken) ||
-                    visitNode(cbNode, node.name);
-            case 173 /* ElementAccessExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.argumentExpression);
-            case 174 /* CallExpression */:
-            case 175 /* NewExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments) ||
-                    visitNodes(cbNodes, node.arguments);
-            case 176 /* TaggedTemplateExpression */:
-                return visitNode(cbNode, node.tag) ||
-                    visitNode(cbNode, node.template);
-            case 177 /* TypeAssertionExpression */:
-                return visitNode(cbNode, node.type) ||
-                    visitNode(cbNode, node.expression);
-            case 178 /* ParenthesizedExpression */:
-                return visitNode(cbNode, node.expression);
-            case 181 /* DeleteExpression */:
-                return visitNode(cbNode, node.expression);
-            case 182 /* TypeOfExpression */:
-                return visitNode(cbNode, node.expression);
-            case 183 /* VoidExpression */:
-                return visitNode(cbNode, node.expression);
-            case 185 /* PrefixUnaryExpression */:
-                return visitNode(cbNode, node.operand);
-            case 190 /* YieldExpression */:
-                return visitNode(cbNode, node.asteriskToken) ||
-                    visitNode(cbNode, node.expression);
-            case 184 /* AwaitExpression */:
-                return visitNode(cbNode, node.expression);
-            case 186 /* PostfixUnaryExpression */:
-                return visitNode(cbNode, node.operand);
-            case 187 /* BinaryExpression */:
-                return visitNode(cbNode, node.left) ||
-                    visitNode(cbNode, node.operatorToken) ||
-                    visitNode(cbNode, node.right);
-            case 195 /* AsExpression */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.type);
-            case 196 /* NonNullExpression */:
-                return visitNode(cbNode, node.expression);
-            case 188 /* ConditionalExpression */:
-                return visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.questionToken) ||
-                    visitNode(cbNode, node.whenTrue) ||
-                    visitNode(cbNode, node.colonToken) ||
-                    visitNode(cbNode, node.whenFalse);
-            case 191 /* SpreadElementExpression */:
-                return visitNode(cbNode, node.expression);
-            case 199 /* Block */:
-            case 226 /* ModuleBlock */:
-                return visitNodes(cbNodes, node.statements);
-            case 256 /* SourceFile */:
-                return visitNodes(cbNodes, node.statements) ||
-                    visitNode(cbNode, node.endOfFileToken);
-            case 200 /* VariableStatement */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.declarationList);
-            case 219 /* VariableDeclarationList */:
-                return visitNodes(cbNodes, node.declarations);
-            case 202 /* ExpressionStatement */:
-                return visitNode(cbNode, node.expression);
-            case 203 /* IfStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.thenStatement) ||
-                    visitNode(cbNode, node.elseStatement);
-            case 204 /* DoStatement */:
-                return visitNode(cbNode, node.statement) ||
-                    visitNode(cbNode, node.expression);
-            case 205 /* WhileStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 206 /* ForStatement */:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.condition) ||
-                    visitNode(cbNode, node.incrementor) ||
-                    visitNode(cbNode, node.statement);
-            case 207 /* ForInStatement */:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 208 /* ForOfStatement */:
-                return visitNode(cbNode, node.initializer) ||
-                    visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 209 /* ContinueStatement */:
-            case 210 /* BreakStatement */:
-                return visitNode(cbNode, node.label);
-            case 211 /* ReturnStatement */:
-                return visitNode(cbNode, node.expression);
-            case 212 /* WithStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.statement);
-            case 213 /* SwitchStatement */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNode(cbNode, node.caseBlock);
-            case 227 /* CaseBlock */:
-                return visitNodes(cbNodes, node.clauses);
-            case 249 /* CaseClause */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.statements);
-            case 250 /* DefaultClause */:
-                return visitNodes(cbNodes, node.statements);
-            case 214 /* LabeledStatement */:
-                return visitNode(cbNode, node.label) ||
-                    visitNode(cbNode, node.statement);
-            case 215 /* ThrowStatement */:
-                return visitNode(cbNode, node.expression);
-            case 216 /* TryStatement */:
-                return visitNode(cbNode, node.tryBlock) ||
-                    visitNode(cbNode, node.catchClause) ||
-                    visitNode(cbNode, node.finallyBlock);
-            case 252 /* CatchClause */:
-                return visitNode(cbNode, node.variableDeclaration) ||
-                    visitNode(cbNode, node.block);
-            case 143 /* Decorator */:
-                return visitNode(cbNode, node.expression);
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 222 /* InterfaceDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNodes(cbNodes, node.heritageClauses) ||
-                    visitNodes(cbNodes, node.members);
-            case 223 /* TypeAliasDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeParameters) ||
-                    visitNode(cbNode, node.type);
-            case 224 /* EnumDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.members);
-            case 255 /* EnumMember */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 225 /* ModuleDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.body);
-            case 229 /* ImportEqualsDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.moduleReference);
-            case 230 /* ImportDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.importClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 231 /* ImportClause */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.namedBindings);
-            case 228 /* NamespaceExportDeclaration */:
-                return visitNode(cbNode, node.name);
-            case 232 /* NamespaceImport */:
-                return visitNode(cbNode, node.name);
-            case 233 /* NamedImports */:
-            case 237 /* NamedExports */:
-                return visitNodes(cbNodes, node.elements);
-            case 236 /* ExportDeclaration */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.exportClause) ||
-                    visitNode(cbNode, node.moduleSpecifier);
-            case 234 /* ImportSpecifier */:
-            case 238 /* ExportSpecifier */:
-                return visitNode(cbNode, node.propertyName) ||
-                    visitNode(cbNode, node.name);
-            case 235 /* ExportAssignment */:
-                return visitNodes(cbNodes, node.decorators) ||
-                    visitNodes(cbNodes, node.modifiers) ||
-                    visitNode(cbNode, node.expression);
-            case 189 /* TemplateExpression */:
-                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
-            case 197 /* TemplateSpan */:
-                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
-            case 140 /* ComputedPropertyName */:
-                return visitNode(cbNode, node.expression);
-            case 251 /* HeritageClause */:
-                return visitNodes(cbNodes, node.types);
-            case 194 /* ExpressionWithTypeArguments */:
-                return visitNode(cbNode, node.expression) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 240 /* ExternalModuleReference */:
-                return visitNode(cbNode, node.expression);
-            case 239 /* MissingDeclaration */:
-                return visitNodes(cbNodes, node.decorators);
-            case 241 /* JsxElement */:
-                return visitNode(cbNode, node.openingElement) ||
-                    visitNodes(cbNodes, node.children) ||
-                    visitNode(cbNode, node.closingElement);
-            case 242 /* JsxSelfClosingElement */:
-            case 243 /* JsxOpeningElement */:
-                return visitNode(cbNode, node.tagName) ||
-                    visitNodes(cbNodes, node.attributes);
-            case 246 /* JsxAttribute */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.initializer);
-            case 247 /* JsxSpreadAttribute */:
-                return visitNode(cbNode, node.expression);
-            case 248 /* JsxExpression */:
-                return visitNode(cbNode, node.expression);
-            case 245 /* JsxClosingElement */:
-                return visitNode(cbNode, node.tagName);
-            case 257 /* JSDocTypeExpression */:
-                return visitNode(cbNode, node.type);
-            case 261 /* JSDocUnionType */:
-                return visitNodes(cbNodes, node.types);
-            case 262 /* JSDocTupleType */:
-                return visitNodes(cbNodes, node.types);
-            case 260 /* JSDocArrayType */:
-                return visitNode(cbNode, node.elementType);
-            case 264 /* JSDocNonNullableType */:
-                return visitNode(cbNode, node.type);
-            case 263 /* JSDocNullableType */:
-                return visitNode(cbNode, node.type);
-            case 265 /* JSDocRecordType */:
-                return visitNodes(cbNodes, node.members);
-            case 267 /* JSDocTypeReference */:
-                return visitNode(cbNode, node.name) ||
-                    visitNodes(cbNodes, node.typeArguments);
-            case 268 /* JSDocOptionalType */:
-                return visitNode(cbNode, node.type);
-            case 269 /* JSDocFunctionType */:
-                return visitNodes(cbNodes, node.parameters) ||
-                    visitNode(cbNode, node.type);
-            case 270 /* JSDocVariadicType */:
-                return visitNode(cbNode, node.type);
-            case 271 /* JSDocConstructorType */:
-                return visitNode(cbNode, node.type);
-            case 272 /* JSDocThisType */:
-                return visitNode(cbNode, node.type);
-            case 266 /* JSDocRecordMember */:
-                return visitNode(cbNode, node.name) ||
-                    visitNode(cbNode, node.type);
-            case 273 /* JSDocComment */:
-                return visitNodes(cbNodes, node.tags);
-            case 275 /* JSDocParameterTag */:
-                return visitNode(cbNode, node.preParameterName) ||
-                    visitNode(cbNode, node.typeExpression) ||
-                    visitNode(cbNode, node.postParameterName);
-            case 276 /* JSDocReturnTag */:
-                return visitNode(cbNode, node.typeExpression);
-            case 277 /* JSDocTypeTag */:
-                return visitNode(cbNode, node.typeExpression);
-            case 278 /* JSDocTemplateTag */:
-                return visitNodes(cbNodes, node.typeParameters);
-        }
-    }
-    ts.forEachChild = forEachChild;
-    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
-        if (setParentNodes === void 0) { setParentNodes = false; }
-        var start = new Date().getTime();
-        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, /*syntaxCursor*/ undefined, setParentNodes, scriptKind);
-        ts.parseTime += new Date().getTime() - start;
-        return result;
-    }
-    ts.createSourceFile = createSourceFile;
-    function isExternalModule(file) {
-        return file.externalModuleIndicator !== undefined;
-    }
-    ts.isExternalModule = isExternalModule;
-    // Produces a new SourceFile for the 'newText' provided. The 'textChangeRange' parameter
-    // indicates what changed between the 'text' that this SourceFile has and the 'newText'.
-    // The SourceFile will be created with the compiler attempting to reuse as many nodes from
-    // this file as possible.
-    //
-    // Note: this function mutates nodes from this SourceFile. That means any existing nodes
-    // from this SourceFile that are being held onto may change as a result (including
-    // becoming detached from any SourceFile).  It is recommended that this SourceFile not
-    // be used once 'update' is called on it.
-    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-        return IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
-    }
-    ts.updateSourceFile = updateSourceFile;
-    /* @internal */
-    function parseIsolatedJSDocComment(content, start, length) {
-        return Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
-    }
-    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-    /* @internal */
-    // Exposed only for testing.
-    function parseJSDocTypeExpressionForTests(content, start, length) {
-        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
-    }
-    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-    // Implement the parser as a singleton module.  We do this for perf reasons because creating
-    // parser instances can actually be expensive enough to impact us on projects with many source
-    // files.
-    var Parser;
-    (function (Parser) {
-        // Share a single scanner across all calls to parse a source file.  This helps speed things
-        // up by avoiding the cost of creating/compiling scanners over and over again.
-        var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ true);
-        var disallowInAndDecoratorContext = 4194304 /* DisallowInContext */ | 16777216 /* DecoratorContext */;
-        // capture constructors in 'initializeState' to avoid null checks
-        var NodeConstructor;
-        var SourceFileConstructor;
-        var sourceFile;
-        var parseDiagnostics;
-        var syntaxCursor;
-        var token;
-        var sourceText;
-        var nodeCount;
-        var identifiers;
-        var identifierCount;
-        var parsingContext;
-        // Flags that dictate what parsing context we're in.  For example:
-        // Whether or not we are in strict parsing mode.  All that changes in strict parsing mode is
-        // that some tokens that would be considered identifiers may be considered keywords.
-        //
-        // When adding more parser context flags, consider which is the more common case that the
-        // flag will be in.  This should be the 'false' state for that flag.  The reason for this is
-        // that we don't store data in our nodes unless the value is in the *non-default* state.  So,
-        // for example, more often than code 'allows-in' (or doesn't 'disallow-in').  We opt for
-        // 'disallow-in' set to 'false'.  Otherwise, if we had 'allowsIn' set to 'true', then almost
-        // all nodes would need extra state on them to store this info.
-        //
-        // Note:  'allowIn' and 'allowYield' track 1:1 with the [in] and [yield] concepts in the ES6
-        // grammar specification.
-        //
-        // An important thing about these context concepts.  By default they are effectively inherited
-        // while parsing through every grammar production.  i.e. if you don't change them, then when
-        // you parse a sub-production, it will have the same context values as the parent production.
-        // This is great most of the time.  After all, consider all the 'expression' grammar productions
-        // and how nearly all of them pass along the 'in' and 'yield' context values:
-        //
-        // EqualityExpression[In, Yield] :
-        //      RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] == RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] != RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] === RelationalExpression[?In, ?Yield]
-        //      EqualityExpression[?In, ?Yield] !== RelationalExpression[?In, ?Yield]
-        //
-        // Where you have to be careful is then understanding what the points are in the grammar
-        // where the values are *not* passed along.  For example:
-        //
-        // SingleNameBinding[Yield,GeneratorParameter]
-        //      [+GeneratorParameter]BindingIdentifier[Yield] Initializer[In]opt
-        //      [~GeneratorParameter]BindingIdentifier[?Yield]Initializer[In, ?Yield]opt
-        //
-        // Here this is saying that if the GeneratorParameter context flag is set, that we should
-        // explicitly set the 'yield' context flag to false before calling into the BindingIdentifier
-        // and we should explicitly unset the 'yield' context flag before calling into the Initializer.
-        // production.  Conversely, if the GeneratorParameter context flag is not set, then we
-        // should leave the 'yield' context flag alone.
-        //
-        // Getting this all correct is tricky and requires careful reading of the grammar to
-        // understand when these values should be changed versus when they should be inherited.
-        //
-        // Note: it should not be necessary to save/restore these flags during speculative/lookahead
-        // parsing.  These context flags are naturally stored and restored through normal recursive
-        // descent parsing and unwinding.
-        var contextFlags;
-        // Whether or not we've had a parse error since creating the last AST node.  If we have
-        // encountered an error, it will be stored on the next AST node we create.  Parse errors
-        // can be broken down into three categories:
-        //
-        // 1) An error that occurred during scanning.  For example, an unterminated literal, or a
-        //    character that was completely not understood.
-        //
-        // 2) A token was expected, but was not present.  This type of error is commonly produced
-        //    by the 'parseExpected' function.
-        //
-        // 3) A token was present that no parsing function was able to consume.  This type of error
-        //    only occurs in the 'abortParsingListOrMoveToNextToken' function when the parser
-        //    decides to skip the token.
-        //
-        // In all of these cases, we want to mark the next node as having had an error before it.
-        // With this mark, we can know in incremental settings if this node can be reused, or if
-        // we have to reparse it.  If we don't keep this information around, we may just reuse the
-        // node.  in that event we would then not produce the same errors as we did before, causing
-        // significant confusion problems.
-        //
-        // Note: it is necessary that this value be saved/restored during speculative/lookahead
-        // parsing.  During lookahead parsing, we will often create a node.  That node will have
-        // this value attached, and then this value will be set back to 'false'.  If we decide to
-        // rewind, we must get back to the same value we had prior to the lookahead.
-        //
-        // Note: any errors at the end of the file that do not precede a regular node, should get
-        // attached to the EOF token.
-        var parseErrorBeforeNextFinishedNode = false;
-        function parseSourceFile(fileName, _sourceText, languageVersion, _syntaxCursor, setParentNodes, scriptKind) {
-            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
-            initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind);
-            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
-            clearState();
-            return result;
-        }
-        Parser.parseSourceFile = parseSourceFile;
-        function getLanguageVariant(scriptKind) {
-            // .tsx and .jsx files are treated as jsx language variant.
-            return scriptKind === 4 /* TSX */ || scriptKind === 2 /* JSX */ || scriptKind === 1 /* JS */ ? 1 /* JSX */ : 0 /* Standard */;
-        }
-        function initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind) {
-            NodeConstructor = ts.objectAllocator.getNodeConstructor();
-            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
-            sourceText = _sourceText;
-            syntaxCursor = _syntaxCursor;
-            parseDiagnostics = [];
-            parsingContext = 0;
-            identifiers = {};
-            identifierCount = 0;
-            nodeCount = 0;
-            contextFlags = scriptKind === 1 /* JS */ || scriptKind === 2 /* JSX */ ? 134217728 /* JavaScriptFile */ : 0 /* None */;
-            parseErrorBeforeNextFinishedNode = false;
-            // Initialize and prime the scanner before parsing the source elements.
-            scanner.setText(sourceText);
-            scanner.setOnError(scanError);
-            scanner.setScriptTarget(languageVersion);
-            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
-        }
-        function clearState() {
-            // Clear out the text the scanner is pointing at, so it doesn't keep anything alive unnecessarily.
-            scanner.setText("");
-            scanner.setOnError(undefined);
-            // Clear any data.  We don't want to accidentally hold onto it for too long.
-            parseDiagnostics = undefined;
-            sourceFile = undefined;
-            identifiers = undefined;
-            syntaxCursor = undefined;
-            sourceText = undefined;
-        }
-        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
-            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
-            sourceFile.flags = contextFlags;
-            // Prime the scanner.
-            token = nextToken();
-            processReferenceComments(sourceFile);
-            sourceFile.statements = parseList(0 /* SourceElements */, parseStatement);
-            ts.Debug.assert(token === 1 /* EndOfFileToken */);
-            sourceFile.endOfFileToken = parseTokenNode();
-            setExternalModuleIndicator(sourceFile);
-            sourceFile.nodeCount = nodeCount;
-            sourceFile.identifierCount = identifierCount;
-            sourceFile.identifiers = identifiers;
-            sourceFile.parseDiagnostics = parseDiagnostics;
-            if (setParentNodes) {
-                fixupParentReferences(sourceFile);
-            }
-            return sourceFile;
-        }
-        function addJSDocComment(node) {
-            if (contextFlags & 134217728 /* JavaScriptFile */) {
-                var comments = ts.getLeadingCommentRangesOfNode(node, sourceFile);
-                if (comments) {
-                    for (var _i = 0, comments_1 = comments; _i < comments_1.length; _i++) {
-                        var comment = comments_1[_i];
-                        var jsDocComment = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
-                        if (jsDocComment) {
-                            node.jsDocComment = jsDocComment;
-                        }
-                    }
-                }
-            }
-            return node;
-        }
-        function fixupParentReferences(sourceFile) {
-            // normally parent references are set during binding. However, for clients that only need
-            // a syntax tree, and no semantic features, then the binding process is an unnecessary
-            // overhead.  This functions allows us to set all the parents, without all the expense of
-            // binding.
-            var parent = sourceFile;
-            forEachChild(sourceFile, visitNode);
-            return;
-            function visitNode(n) {
-                // walk down setting parents that differ from the parent we think it should be.  This
-                // allows us to quickly bail out of setting parents for subtrees during incremental
-                // parsing
-                if (n.parent !== parent) {
-                    n.parent = parent;
-                    var saveParent = parent;
-                    parent = n;
-                    forEachChild(n, visitNode);
-                    parent = saveParent;
-                }
-            }
-        }
-        Parser.fixupParentReferences = fixupParentReferences;
-        function createSourceFile(fileName, languageVersion, scriptKind) {
-            // code from createNode is inlined here so createNode won't have to deal with special case of creating source files
-            // this is quite rare comparing to other nodes and createNode should be as fast as possible
-            var sourceFile = new SourceFileConstructor(256 /* SourceFile */, /*pos*/ 0, /* end */ sourceText.length);
-            nodeCount++;
-            sourceFile.text = sourceText;
-            sourceFile.bindDiagnostics = [];
-            sourceFile.languageVersion = languageVersion;
-            sourceFile.fileName = ts.normalizePath(fileName);
-            sourceFile.languageVariant = getLanguageVariant(scriptKind);
-            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts");
-            sourceFile.scriptKind = scriptKind;
-            return sourceFile;
-        }
-        function setContextFlag(val, flag) {
-            if (val) {
-                contextFlags |= flag;
-            }
-            else {
-                contextFlags &= ~flag;
-            }
-        }
-        function setDisallowInContext(val) {
-            setContextFlag(val, 4194304 /* DisallowInContext */);
-        }
-        function setYieldContext(val) {
-            setContextFlag(val, 8388608 /* YieldContext */);
-        }
-        function setDecoratorContext(val) {
-            setContextFlag(val, 16777216 /* DecoratorContext */);
-        }
-        function setAwaitContext(val) {
-            setContextFlag(val, 33554432 /* AwaitContext */);
-        }
-        function doOutsideOfContext(context, func) {
-            // contextFlagsToClear will contain only the context flags that are
-            // currently set that we need to temporarily clear
-            // We don't just blindly reset to the previous flags to ensure
-            // that we do not mutate cached flags for the incremental
-            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
-            // HasAggregatedChildData).
-            var contextFlagsToClear = context & contextFlags;
-            if (contextFlagsToClear) {
-                // clear the requested context flags
-                setContextFlag(/*val*/ false, contextFlagsToClear);
-                var result = func();
-                // restore the context flags we just cleared
-                setContextFlag(/*val*/ true, contextFlagsToClear);
-                return result;
-            }
-            // no need to do anything special as we are not in any of the requested contexts
-            return func();
-        }
-        function doInsideOfContext(context, func) {
-            // contextFlagsToSet will contain only the context flags that
-            // are not currently set that we need to temporarily enable.
-            // We don't just blindly reset to the previous flags to ensure
-            // that we do not mutate cached flags for the incremental
-            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
-            // HasAggregatedChildData).
-            var contextFlagsToSet = context & ~contextFlags;
-            if (contextFlagsToSet) {
-                // set the requested context flags
-                setContextFlag(/*val*/ true, contextFlagsToSet);
-                var result = func();
-                // reset the context flags we just set
-                setContextFlag(/*val*/ false, contextFlagsToSet);
-                return result;
-            }
-            // no need to do anything special as we are already in all of the requested contexts
-            return func();
-        }
-        function allowInAnd(func) {
-            return doOutsideOfContext(4194304 /* DisallowInContext */, func);
-        }
-        function disallowInAnd(func) {
-            return doInsideOfContext(4194304 /* DisallowInContext */, func);
-        }
-        function doInYieldContext(func) {
-            return doInsideOfContext(8388608 /* YieldContext */, func);
-        }
-        function doInDecoratorContext(func) {
-            return doInsideOfContext(16777216 /* DecoratorContext */, func);
-        }
-        function doInAwaitContext(func) {
-            return doInsideOfContext(33554432 /* AwaitContext */, func);
-        }
-        function doOutsideOfAwaitContext(func) {
-            return doOutsideOfContext(33554432 /* AwaitContext */, func);
-        }
-        function doInYieldAndAwaitContext(func) {
-            return doInsideOfContext(8388608 /* YieldContext */ | 33554432 /* AwaitContext */, func);
-        }
-        function inContext(flags) {
-            return (contextFlags & flags) !== 0;
-        }
-        function inYieldContext() {
-            return inContext(8388608 /* YieldContext */);
-        }
-        function inDisallowInContext() {
-            return inContext(4194304 /* DisallowInContext */);
-        }
-        function inDecoratorContext() {
-            return inContext(16777216 /* DecoratorContext */);
-        }
-        function inAwaitContext() {
-            return inContext(33554432 /* AwaitContext */);
-        }
-        function parseErrorAtCurrentToken(message, arg0) {
-            var start = scanner.getTokenPos();
-            var length = scanner.getTextPos() - start;
-            parseErrorAtPosition(start, length, message, arg0);
-        }
-        function parseErrorAtPosition(start, length, message, arg0) {
-            // Don't report another error if it would just be at the same position as the last error.
-            var lastError = ts.lastOrUndefined(parseDiagnostics);
-            if (!lastError || start !== lastError.start) {
-                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
-            }
-            // Mark that we've encountered an error.  We'll set an appropriate bit on the next
-            // node we finish so that it can't be reused incrementally.
-            parseErrorBeforeNextFinishedNode = true;
-        }
-        function scanError(message, length) {
-            var pos = scanner.getTextPos();
-            parseErrorAtPosition(pos, length || 0, message);
-        }
-        function getNodePos() {
-            return scanner.getStartPos();
-        }
-        function getNodeEnd() {
-            return scanner.getStartPos();
-        }
-        function nextToken() {
-            return token = scanner.scan();
-        }
-        function reScanGreaterToken() {
-            return token = scanner.reScanGreaterToken();
-        }
-        function reScanSlashToken() {
-            return token = scanner.reScanSlashToken();
-        }
-        function reScanTemplateToken() {
-            return token = scanner.reScanTemplateToken();
-        }
-        function scanJsxIdentifier() {
-            return token = scanner.scanJsxIdentifier();
-        }
-        function scanJsxText() {
-            return token = scanner.scanJsxToken();
-        }
-        function speculationHelper(callback, isLookAhead) {
-            // Keep track of the state we'll need to rollback to if lookahead fails (or if the
-            // caller asked us to always reset our state).
-            var saveToken = token;
-            var saveParseDiagnosticsLength = parseDiagnostics.length;
-            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-            // Note: it is not actually necessary to save/restore the context flags here.  That's
-            // because the saving/restoring of these flags happens naturally through the recursive
-            // descent nature of our parser.  However, we still store this here just so we can
-            // assert that that invariant holds.
-            var saveContextFlags = contextFlags;
-            // If we're only looking ahead, then tell the scanner to only lookahead as well.
-            // Otherwise, if we're actually speculatively parsing, then tell the scanner to do the
-            // same.
-            var result = isLookAhead
-                ? scanner.lookAhead(callback)
-                : scanner.tryScan(callback);
-            ts.Debug.assert(saveContextFlags === contextFlags);
-            // If our callback returned something 'falsy' or we're just looking ahead,
-            // then unconditionally restore us to where we were.
-            if (!result || isLookAhead) {
-                token = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-            }
-            return result;
-        }
-        /** Invokes the provided callback then unconditionally restores the parser to the state it
-         * was in immediately prior to invoking the callback.  The result of invoking the callback
-         * is returned from this function.
-         */
-        function lookAhead(callback) {
-            return speculationHelper(callback, /*isLookAhead*/ true);
-        }
-        /** Invokes the provided callback.  If the callback returns something falsy, then it restores
-         * the parser to the state it was in immediately prior to invoking the callback.  If the
-         * callback returns something truthy, then the parser state is not rolled back.  The result
-         * of invoking the callback is returned from this function.
-         */
-        function tryParse(callback) {
-            return speculationHelper(callback, /*isLookAhead*/ false);
-        }
-        // Ignore strict mode flag because we will report an error in type checker instead.
-        function isIdentifier() {
-            if (token === 69 /* Identifier */) {
-                return true;
-            }
-            // If we have a 'yield' keyword, and we're in the [yield] context, then 'yield' is
-            // considered a keyword and is not an identifier.
-            if (token === 114 /* YieldKeyword */ && inYieldContext()) {
-                return false;
-            }
-            // If we have a 'await' keyword, and we're in the [Await] context, then 'await' is
-            // considered a keyword and is not an identifier.
-            if (token === 119 /* AwaitKeyword */ && inAwaitContext()) {
-                return false;
-            }
-            return token > 105 /* LastReservedWord */;
-        }
-        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
-            if (shouldAdvance === void 0) { shouldAdvance = true; }
-            if (token === kind) {
-                if (shouldAdvance) {
-                    nextToken();
-                }
-                return true;
-            }
-            // Report specific message if provided with one.  Otherwise, report generic fallback message.
-            if (diagnosticMessage) {
-                parseErrorAtCurrentToken(diagnosticMessage);
-            }
-            else {
-                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
-            }
-            return false;
-        }
-        function parseOptional(t) {
-            if (token === t) {
-                nextToken();
-                return true;
-            }
-            return false;
-        }
-        function parseOptionalToken(t) {
-            if (token === t) {
-                return parseTokenNode();
-            }
-            return undefined;
-        }
-        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            return parseOptionalToken(t) ||
-                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
-        }
-        function parseTokenNode() {
-            var node = createNode(token);
-            nextToken();
-            return finishNode(node);
-        }
-        function canParseSemicolon() {
-            // If there's a real semicolon, then we can always parse it out.
-            if (token === 23 /* SemicolonToken */) {
-                return true;
-            }
-            // We can parse out an optional semicolon in ASI cases in the following cases.
-            return token === 16 /* CloseBraceToken */ || token === 1 /* EndOfFileToken */ || scanner.hasPrecedingLineBreak();
-        }
-        function parseSemicolon() {
-            if (canParseSemicolon()) {
-                if (token === 23 /* SemicolonToken */) {
-                    // consume the semicolon if it was explicitly provided.
-                    nextToken();
-                }
-                return true;
-            }
-            else {
-                return parseExpected(23 /* SemicolonToken */);
-            }
-        }
-        // note: this function creates only node
-        function createNode(kind, pos) {
-            nodeCount++;
-            if (!(pos >= 0)) {
-                pos = scanner.getStartPos();
-            }
-            return new NodeConstructor(kind, pos, pos);
-        }
-        function finishNode(node, end) {
-            node.end = end === undefined ? scanner.getStartPos() : end;
-            if (contextFlags) {
-                node.flags |= contextFlags;
-            }
-            // Keep track on the node if we encountered an error while parsing it.  If we did, then
-            // we cannot reuse the node incrementally.  Once we've marked this node, clear out the
-            // flag so that we don't mark any subsequent nodes.
-            if (parseErrorBeforeNextFinishedNode) {
-                parseErrorBeforeNextFinishedNode = false;
-                node.flags |= 67108864 /* ThisNodeHasError */;
-            }
-            return node;
-        }
-        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
-            if (reportAtCurrentPosition) {
-                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
-            }
-            else {
-                parseErrorAtCurrentToken(diagnosticMessage, arg0);
-            }
-            var result = createNode(kind, scanner.getStartPos());
-            result.text = "";
-            return finishNode(result);
-        }
-        function internIdentifier(text) {
-            text = ts.escapeIdentifier(text);
-            return ts.hasProperty(identifiers, text) ? identifiers[text] : (identifiers[text] = text);
-        }
-        // An identifier that starts with two underscores has an extra underscore character prepended to it to avoid issues
-        // with magic property names like '__proto__'. The 'identifiers' object is used to share a single string instance for
-        // each identifier in order to reduce memory consumption.
-        function createIdentifier(isIdentifier, diagnosticMessage) {
-            identifierCount++;
-            if (isIdentifier) {
-                var node = createNode(69 /* Identifier */);
-                // Store original token kind if it is not just an Identifier so we can report appropriate error later in type checker
-                if (token !== 69 /* Identifier */) {
-                    node.originalKeywordKind = token;
-                }
-                node.text = internIdentifier(scanner.getTokenValue());
-                nextToken();
-                return finishNode(node);
-            }
-            return createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
-        }
-        function parseIdentifier(diagnosticMessage) {
-            return createIdentifier(isIdentifier(), diagnosticMessage);
-        }
-        function parseIdentifierName() {
-            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token));
-        }
-        function isLiteralPropertyName() {
-            return ts.tokenIsIdentifierOrKeyword(token) ||
-                token === 9 /* StringLiteral */ ||
-                token === 8 /* NumericLiteral */;
-        }
-        function parsePropertyNameWorker(allowComputedPropertyNames) {
-            if (token === 9 /* StringLiteral */ || token === 8 /* NumericLiteral */) {
-                return parseLiteralNode(/*internName*/ true);
-            }
-            if (allowComputedPropertyNames && token === 19 /* OpenBracketToken */) {
-                return parseComputedPropertyName();
-            }
-            return parseIdentifierName();
-        }
-        function parsePropertyName() {
-            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ true);
-        }
-        function parseSimplePropertyName() {
-            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ false);
-        }
-        function isSimplePropertyName() {
-            return token === 9 /* StringLiteral */ || token === 8 /* NumericLiteral */ || ts.tokenIsIdentifierOrKeyword(token);
-        }
-        function parseComputedPropertyName() {
-            // PropertyName [Yield]:
-            //      LiteralPropertyName
-            //      ComputedPropertyName[?Yield]
-            var node = createNode(140 /* ComputedPropertyName */);
-            parseExpected(19 /* OpenBracketToken */);
-            // We parse any expression (including a comma expression). But the grammar
-            // says that only an assignment expression is allowed, so the grammar checker
-            // will error if it sees a comma expression.
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(20 /* CloseBracketToken */);
-            return finishNode(node);
-        }
-        function parseContextualModifier(t) {
-            return token === t && tryParse(nextTokenCanFollowModifier);
-        }
-        function nextTokenIsOnSameLineAndCanFollowModifier() {
-            nextToken();
-            if (scanner.hasPrecedingLineBreak()) {
-                return false;
-            }
-            return canFollowModifier();
-        }
-        function nextTokenCanFollowModifier() {
-            if (token === 74 /* ConstKeyword */) {
-                // 'const' is only a modifier if followed by 'enum'.
-                return nextToken() === 81 /* EnumKeyword */;
-            }
-            if (token === 82 /* ExportKeyword */) {
-                nextToken();
-                if (token === 77 /* DefaultKeyword */) {
-                    return lookAhead(nextTokenIsClassOrFunction);
-                }
-                return token !== 37 /* AsteriskToken */ && token !== 116 /* AsKeyword */ && token !== 15 /* OpenBraceToken */ && canFollowModifier();
-            }
-            if (token === 77 /* DefaultKeyword */) {
-                return nextTokenIsClassOrFunction();
-            }
-            if (token === 113 /* StaticKeyword */) {
-                nextToken();
-                return canFollowModifier();
-            }
-            return nextTokenIsOnSameLineAndCanFollowModifier();
-        }
-        function parseAnyContextualModifier() {
-            return ts.isModifierKind(token) && tryParse(nextTokenCanFollowModifier);
-        }
-        function canFollowModifier() {
-            return token === 19 /* OpenBracketToken */
-                || token === 15 /* OpenBraceToken */
-                || token === 37 /* AsteriskToken */
-                || isLiteralPropertyName();
-        }
-        function nextTokenIsClassOrFunction() {
-            nextToken();
-            return token === 73 /* ClassKeyword */ || token === 87 /* FunctionKeyword */;
-        }
-        // True if positioned at the start of a list element
-        function isListElement(parsingContext, inErrorRecovery) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return true;
-            }
-            switch (parsingContext) {
-                case 0 /* SourceElements */:
-                case 1 /* BlockStatements */:
-                case 3 /* SwitchClauseStatements */:
-                    // If we're in error recovery, then we don't want to treat ';' as an empty statement.
-                    // The problem is that ';' can show up in far too many contexts, and if we see one
-                    // and assume it's a statement, then we may bail out inappropriately from whatever
-                    // we're parsing.  For example, if we have a semicolon in the middle of a class, then
-                    // we really don't want to assume the class is over and we're on a statement in the
-                    // outer module.  We just want to consume and move on.
-                    return !(token === 23 /* SemicolonToken */ && inErrorRecovery) && isStartOfStatement();
-                case 2 /* SwitchClauses */:
-                    return token === 71 /* CaseKeyword */ || token === 77 /* DefaultKeyword */;
-                case 4 /* TypeMembers */:
-                    return lookAhead(isTypeMemberStart);
-                case 5 /* ClassMembers */:
-                    // We allow semicolons as class elements (as specified by ES6) as long as we're
-                    // not in error recovery.  If we're in error recovery, we don't want an errant
-                    // semicolon to be treated as a class member (since they're almost always used
-                    // for statements.
-                    return lookAhead(isClassMemberStart) || (token === 23 /* SemicolonToken */ && !inErrorRecovery);
-                case 6 /* EnumMembers */:
-                    // Include open bracket computed properties. This technically also lets in indexers,
-                    // which would be a candidate for improved error reporting.
-                    return token === 19 /* OpenBracketToken */ || isLiteralPropertyName();
-                case 12 /* ObjectLiteralMembers */:
-                    return token === 19 /* OpenBracketToken */ || token === 37 /* AsteriskToken */ || isLiteralPropertyName();
-                case 9 /* ObjectBindingElements */:
-                    return token === 19 /* OpenBracketToken */ || isLiteralPropertyName();
-                case 7 /* HeritageClauseElement */:
-                    // If we see { } then only consume it as an expression if it is followed by , or {
-                    // That way we won't consume the body of a class in its heritage clause.
-                    if (token === 15 /* OpenBraceToken */) {
-                        return lookAhead(isValidHeritageClauseObjectLiteral);
-                    }
-                    if (!inErrorRecovery) {
-                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
-                    }
-                    else {
-                        // If we're in error recovery we tighten up what we're willing to match.
-                        // That way we don't treat something like "this" as a valid heritage clause
-                        // element during recovery.
-                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
-                    }
-                case 8 /* VariableDeclarations */:
-                    return isIdentifierOrPattern();
-                case 10 /* ArrayBindingElements */:
-                    return token === 24 /* CommaToken */ || token === 22 /* DotDotDotToken */ || isIdentifierOrPattern();
-                case 17 /* TypeParameters */:
-                    return isIdentifier();
-                case 11 /* ArgumentExpressions */:
-                case 15 /* ArrayLiteralMembers */:
-                    return token === 24 /* CommaToken */ || token === 22 /* DotDotDotToken */ || isStartOfExpression();
-                case 16 /* Parameters */:
-                    return isStartOfParameter();
-                case 18 /* TypeArguments */:
-                case 19 /* TupleElementTypes */:
-                    return token === 24 /* CommaToken */ || isStartOfType();
-                case 20 /* HeritageClauses */:
-                    return isHeritageClause();
-                case 21 /* ImportOrExportSpecifiers */:
-                    return ts.tokenIsIdentifierOrKeyword(token);
-                case 13 /* JsxAttributes */:
-                    return ts.tokenIsIdentifierOrKeyword(token) || token === 15 /* OpenBraceToken */;
-                case 14 /* JsxChildren */:
-                    return true;
-                case 22 /* JSDocFunctionParameters */:
-                case 23 /* JSDocTypeArguments */:
-                case 25 /* JSDocTupleTypes */:
-                    return JSDocParser.isJSDocType();
-                case 24 /* JSDocRecordMembers */:
-                    return isSimplePropertyName();
-            }
-            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
-        }
-        function isValidHeritageClauseObjectLiteral() {
-            ts.Debug.assert(token === 15 /* OpenBraceToken */);
-            if (nextToken() === 16 /* CloseBraceToken */) {
-                // if we see  "extends {}" then only treat the {} as what we're extending (and not
-                // the class body) if we have:
-                //
-                //      extends {} {
-                //      extends {},
-                //      extends {} extends
-                //      extends {} implements
-                var next = nextToken();
-                return next === 24 /* CommaToken */ || next === 15 /* OpenBraceToken */ || next === 83 /* ExtendsKeyword */ || next === 106 /* ImplementsKeyword */;
-            }
-            return true;
-        }
-        function nextTokenIsIdentifier() {
-            nextToken();
-            return isIdentifier();
-        }
-        function nextTokenIsIdentifierOrKeyword() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token);
-        }
-        function isHeritageClauseExtendsOrImplementsKeyword() {
-            if (token === 106 /* ImplementsKeyword */ ||
-                token === 83 /* ExtendsKeyword */) {
-                return lookAhead(nextTokenIsStartOfExpression);
-            }
-            return false;
-        }
-        function nextTokenIsStartOfExpression() {
-            nextToken();
-            return isStartOfExpression();
-        }
-        // True if positioned at a list terminator
-        function isListTerminator(kind) {
-            if (token === 1 /* EndOfFileToken */) {
-                // Being at the end of the file ends all lists.
-                return true;
-            }
-            switch (kind) {
-                case 1 /* BlockStatements */:
-                case 2 /* SwitchClauses */:
-                case 4 /* TypeMembers */:
-                case 5 /* ClassMembers */:
-                case 6 /* EnumMembers */:
-                case 12 /* ObjectLiteralMembers */:
-                case 9 /* ObjectBindingElements */:
-                case 21 /* ImportOrExportSpecifiers */:
-                    return token === 16 /* CloseBraceToken */;
-                case 3 /* SwitchClauseStatements */:
-                    return token === 16 /* CloseBraceToken */ || token === 71 /* CaseKeyword */ || token === 77 /* DefaultKeyword */;
-                case 7 /* HeritageClauseElement */:
-                    return token === 15 /* OpenBraceToken */ || token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */;
-                case 8 /* VariableDeclarations */:
-                    return isVariableDeclaratorListTerminator();
-                case 17 /* TypeParameters */:
-                    // Tokens other than '>' are here for better error recovery
-                    return token === 27 /* GreaterThanToken */ || token === 17 /* OpenParenToken */ || token === 15 /* OpenBraceToken */ || token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */;
-                case 11 /* ArgumentExpressions */:
-                    // Tokens other than ')' are here for better error recovery
-                    return token === 18 /* CloseParenToken */ || token === 23 /* SemicolonToken */;
-                case 15 /* ArrayLiteralMembers */:
-                case 19 /* TupleElementTypes */:
-                case 10 /* ArrayBindingElements */:
-                    return token === 20 /* CloseBracketToken */;
-                case 16 /* Parameters */:
-                    // Tokens other than ')' and ']' (the latter for index signatures) are here for better error recovery
-                    return token === 18 /* CloseParenToken */ || token === 20 /* CloseBracketToken */ /*|| token === SyntaxKind.OpenBraceToken*/;
-                case 18 /* TypeArguments */:
-                    // Tokens other than '>' are here for better error recovery
-                    return token === 27 /* GreaterThanToken */ || token === 17 /* OpenParenToken */;
-                case 20 /* HeritageClauses */:
-                    return token === 15 /* OpenBraceToken */ || token === 16 /* CloseBraceToken */;
-                case 13 /* JsxAttributes */:
-                    return token === 27 /* GreaterThanToken */ || token === 39 /* SlashToken */;
-                case 14 /* JsxChildren */:
-                    return token === 25 /* LessThanToken */ && lookAhead(nextTokenIsSlash);
-                case 22 /* JSDocFunctionParameters */:
-                    return token === 18 /* CloseParenToken */ || token === 54 /* ColonToken */ || token === 16 /* CloseBraceToken */;
-                case 23 /* JSDocTypeArguments */:
-                    return token === 27 /* GreaterThanToken */ || token === 16 /* CloseBraceToken */;
-                case 25 /* JSDocTupleTypes */:
-                    return token === 20 /* CloseBracketToken */ || token === 16 /* CloseBraceToken */;
-                case 24 /* JSDocRecordMembers */:
-                    return token === 16 /* CloseBraceToken */;
-            }
-        }
-        function isVariableDeclaratorListTerminator() {
-            // If we can consume a semicolon (either explicitly, or with ASI), then consider us done
-            // with parsing the list of  variable declarators.
-            if (canParseSemicolon()) {
-                return true;
-            }
-            // in the case where we're parsing the variable declarator of a 'for-in' statement, we
-            // are done if we see an 'in' keyword in front of us. Same with for-of
-            if (isInOrOfKeyword(token)) {
-                return true;
-            }
-            // ERROR RECOVERY TWEAK:
-            // For better error recovery, if we see an '=>' then we just stop immediately.  We've got an
-            // arrow function here and it's going to be very unlikely that we'll resynchronize and get
-            // another variable declaration.
-            if (token === 34 /* EqualsGreaterThanToken */) {
-                return true;
-            }
-            // Keep trying to parse out variable declarators.
-            return false;
-        }
-        // True if positioned at element or terminator of the current list or any enclosing list
-        function isInSomeParsingContext() {
-            for (var kind = 0; kind < 26 /* Count */; kind++) {
-                if (parsingContext & (1 << kind)) {
-                    if (isListElement(kind, /*inErrorRecovery*/ true) || isListTerminator(kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        // Parses a list of elements
-        function parseList(kind, parseElement) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = [];
-            result.pos = getNodePos();
-            while (!isListTerminator(kind)) {
-                if (isListElement(kind, /*inErrorRecovery*/ false)) {
-                    var element = parseListElement(kind, parseElement);
-                    result.push(element);
-                    continue;
-                }
-                if (abortParsingListOrMoveToNextToken(kind)) {
-                    break;
-                }
-            }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function parseListElement(parsingContext, parseElement) {
-            var node = currentNode(parsingContext);
-            if (node) {
-                return consumeNode(node);
-            }
-            return parseElement();
-        }
-        function currentNode(parsingContext) {
-            // If there is an outstanding parse error that we've encountered, but not attached to
-            // some node, then we cannot get a node from the old source tree.  This is because we
-            // want to mark the next node we encounter as being unusable.
-            //
-            // Note: This may be too conservative.  Perhaps we could reuse the node and set the bit
-            // on it (or its leftmost child) as having the error.  For now though, being conservative
-            // is nice and likely won't ever affect perf.
-            if (parseErrorBeforeNextFinishedNode) {
-                return undefined;
-            }
-            if (!syntaxCursor) {
-                // if we don't have a cursor, we could never return a node from the old tree.
-                return undefined;
-            }
-            var node = syntaxCursor.currentNode(scanner.getStartPos());
-            // Can't reuse a missing node.
-            if (ts.nodeIsMissing(node)) {
-                return undefined;
-            }
-            // Can't reuse a node that intersected the change range.
-            if (node.intersectsChange) {
-                return undefined;
-            }
-            // Can't reuse a node that contains a parse error.  This is necessary so that we
-            // produce the same set of errors again.
-            if (ts.containsParseError(node)) {
-                return undefined;
-            }
-            // We can only reuse a node if it was parsed under the same strict mode that we're
-            // currently in.  i.e. if we originally parsed a node in non-strict mode, but then
-            // the user added 'using strict' at the top of the file, then we can't use that node
-            // again as the presence of strict mode may cause us to parse the tokens in the file
-            // differently.
-            //
-            // Note: we *can* reuse tokens when the strict mode changes.  That's because tokens
-            // are unaffected by strict mode.  It's just the parser will decide what to do with it
-            // differently depending on what mode it is in.
-            //
-            // This also applies to all our other context flags as well.
-            var nodeContextFlags = node.flags & 197132288 /* ContextFlags */;
-            if (nodeContextFlags !== contextFlags) {
-                return undefined;
-            }
-            // Ok, we have a node that looks like it could be reused.  Now verify that it is valid
-            // in the current list parsing context that we're currently at.
-            if (!canReuseNode(node, parsingContext)) {
-                return undefined;
-            }
-            return node;
-        }
-        function consumeNode(node) {
-            // Move the scanner so it is after the node we just consumed.
-            scanner.setTextPos(node.end);
-            nextToken();
-            return node;
-        }
-        function canReuseNode(node, parsingContext) {
-            switch (parsingContext) {
-                case 5 /* ClassMembers */:
-                    return isReusableClassMember(node);
-                case 2 /* SwitchClauses */:
-                    return isReusableSwitchClause(node);
-                case 0 /* SourceElements */:
-                case 1 /* BlockStatements */:
-                case 3 /* SwitchClauseStatements */:
-                    return isReusableStatement(node);
-                case 6 /* EnumMembers */:
-                    return isReusableEnumMember(node);
-                case 4 /* TypeMembers */:
-                    return isReusableTypeMember(node);
-                case 8 /* VariableDeclarations */:
-                    return isReusableVariableDeclaration(node);
-                case 16 /* Parameters */:
-                    return isReusableParameter(node);
-                // Any other lists we do not care about reusing nodes in.  But feel free to add if
-                // you can do so safely.  Danger areas involve nodes that may involve speculative
-                // parsing.  If speculative parsing is involved with the node, then the range the
-                // parser reached while looking ahead might be in the edited range (see the example
-                // in canReuseVariableDeclaratorNode for a good case of this).
-                case 20 /* HeritageClauses */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // heritage clauses.
-                case 17 /* TypeParameters */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // type parameters.  Note that that's because type *parameters* only occur in
-                // unambiguous *type* contexts.  While type *arguments* occur in very ambiguous
-                // *expression* contexts.
-                case 19 /* TupleElementTypes */:
-                // This would probably be safe to reuse.  There is no speculative parsing with
-                // tuple types.
-                // Technically, type argument list types are probably safe to reuse.  While
-                // speculative parsing is involved with them (since type argument lists are only
-                // produced from speculative parsing a < as a type argument list), we only have
-                // the types because speculative parsing succeeded.  Thus, the lookahead never
-                // went past the end of the list and rewound.
-                case 18 /* TypeArguments */:
-                // Note: these are almost certainly not safe to ever reuse.  Expressions commonly
-                // need a large amount of lookahead, and we should not reuse them as they may
-                // have actually intersected the edit.
-                case 11 /* ArgumentExpressions */:
-                // This is not safe to reuse for the same reason as the 'AssignmentExpression'
-                // cases.  i.e. a property assignment may end with an expression, and thus might
-                // have lookahead far beyond it's old node.
-                case 12 /* ObjectLiteralMembers */:
-                // This is probably not safe to reuse.  There can be speculative parsing with
-                // type names in a heritage clause.  There can be generic names in the type
-                // name list, and there can be left hand side expressions (which can have type
-                // arguments.)
-                case 7 /* HeritageClauseElement */:
-                // Perhaps safe to reuse, but it's unlikely we'd see more than a dozen attributes
-                // on any given element. Same for children.
-                case 13 /* JsxAttributes */:
-                case 14 /* JsxChildren */:
-            }
-            return false;
-        }
-        function isReusableClassMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 148 /* Constructor */:
-                    case 153 /* IndexSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 145 /* PropertyDeclaration */:
-                    case 198 /* SemicolonClassElement */:
-                        return true;
-                    case 147 /* MethodDeclaration */:
-                        // Method declarations are not necessarily reusable.  An object-literal
-                        // may have a method calls "constructor(...)" and we must reparse that
-                        // into an actual .ConstructorDeclaration.
-                        var methodDeclaration = node;
-                        var nameIsConstructor = methodDeclaration.name.kind === 69 /* Identifier */ &&
-                            methodDeclaration.name.originalKeywordKind === 121 /* ConstructorKeyword */;
-                        return !nameIsConstructor;
-                }
-            }
-            return false;
-        }
-        function isReusableSwitchClause(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 249 /* CaseClause */:
-                    case 250 /* DefaultClause */:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableStatement(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 200 /* VariableStatement */:
-                    case 199 /* Block */:
-                    case 203 /* IfStatement */:
-                    case 202 /* ExpressionStatement */:
-                    case 215 /* ThrowStatement */:
-                    case 211 /* ReturnStatement */:
-                    case 213 /* SwitchStatement */:
-                    case 210 /* BreakStatement */:
-                    case 209 /* ContinueStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 206 /* ForStatement */:
-                    case 205 /* WhileStatement */:
-                    case 212 /* WithStatement */:
-                    case 201 /* EmptyStatement */:
-                    case 216 /* TryStatement */:
-                    case 214 /* LabeledStatement */:
-                    case 204 /* DoStatement */:
-                    case 217 /* DebuggerStatement */:
-                    case 230 /* ImportDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 236 /* ExportDeclaration */:
-                    case 235 /* ExportAssignment */:
-                    case 225 /* ModuleDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableEnumMember(node) {
-            return node.kind === 255 /* EnumMember */;
-        }
-        function isReusableTypeMember(node) {
-            if (node) {
-                switch (node.kind) {
-                    case 152 /* ConstructSignature */:
-                    case 146 /* MethodSignature */:
-                    case 153 /* IndexSignature */:
-                    case 144 /* PropertySignature */:
-                    case 151 /* CallSignature */:
-                        return true;
-                }
-            }
-            return false;
-        }
-        function isReusableVariableDeclaration(node) {
-            if (node.kind !== 218 /* VariableDeclaration */) {
-                return false;
-            }
-            // Very subtle incremental parsing bug.  Consider the following code:
-            //
-            //      let v = new List < A, B
-            //
-            // This is actually legal code.  It's a list of variable declarators "v = new List<A"
-            // on one side and "B" on the other. If you then change that to:
-            //
-            //      let v = new List < A, B >()
-            //
-            // then we have a problem.  "v = new List<A" doesn't intersect the change range, so we
-            // start reparsing at "B" and we completely fail to handle this properly.
-            //
-            // In order to prevent this, we do not allow a variable declarator to be reused if it
-            // has an initializer.
-            var variableDeclarator = node;
-            return variableDeclarator.initializer === undefined;
-        }
-        function isReusableParameter(node) {
-            if (node.kind !== 142 /* Parameter */) {
-                return false;
-            }
-            // See the comment in isReusableVariableDeclaration for why we do this.
-            var parameter = node;
-            return parameter.initializer === undefined;
-        }
-        // Returns true if we should abort parsing.
-        function abortParsingListOrMoveToNextToken(kind) {
-            parseErrorAtCurrentToken(parsingContextErrors(kind));
-            if (isInSomeParsingContext()) {
-                return true;
-            }
-            nextToken();
-            return false;
-        }
-        function parsingContextErrors(context) {
-            switch (context) {
-                case 0 /* SourceElements */: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 1 /* BlockStatements */: return ts.Diagnostics.Declaration_or_statement_expected;
-                case 2 /* SwitchClauses */: return ts.Diagnostics.case_or_default_expected;
-                case 3 /* SwitchClauseStatements */: return ts.Diagnostics.Statement_expected;
-                case 4 /* TypeMembers */: return ts.Diagnostics.Property_or_signature_expected;
-                case 5 /* ClassMembers */: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
-                case 6 /* EnumMembers */: return ts.Diagnostics.Enum_member_expected;
-                case 7 /* HeritageClauseElement */: return ts.Diagnostics.Expression_expected;
-                case 8 /* VariableDeclarations */: return ts.Diagnostics.Variable_declaration_expected;
-                case 9 /* ObjectBindingElements */: return ts.Diagnostics.Property_destructuring_pattern_expected;
-                case 10 /* ArrayBindingElements */: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
-                case 11 /* ArgumentExpressions */: return ts.Diagnostics.Argument_expression_expected;
-                case 12 /* ObjectLiteralMembers */: return ts.Diagnostics.Property_assignment_expected;
-                case 15 /* ArrayLiteralMembers */: return ts.Diagnostics.Expression_or_comma_expected;
-                case 16 /* Parameters */: return ts.Diagnostics.Parameter_declaration_expected;
-                case 17 /* TypeParameters */: return ts.Diagnostics.Type_parameter_declaration_expected;
-                case 18 /* TypeArguments */: return ts.Diagnostics.Type_argument_expected;
-                case 19 /* TupleElementTypes */: return ts.Diagnostics.Type_expected;
-                case 20 /* HeritageClauses */: return ts.Diagnostics.Unexpected_token_expected;
-                case 21 /* ImportOrExportSpecifiers */: return ts.Diagnostics.Identifier_expected;
-                case 13 /* JsxAttributes */: return ts.Diagnostics.Identifier_expected;
-                case 14 /* JsxChildren */: return ts.Diagnostics.Identifier_expected;
-                case 22 /* JSDocFunctionParameters */: return ts.Diagnostics.Parameter_declaration_expected;
-                case 23 /* JSDocTypeArguments */: return ts.Diagnostics.Type_argument_expected;
-                case 25 /* JSDocTupleTypes */: return ts.Diagnostics.Type_expected;
-                case 24 /* JSDocRecordMembers */: return ts.Diagnostics.Property_assignment_expected;
-            }
-        }
-        ;
-        // Parses a comma-delimited list of elements
-        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << kind;
-            var result = [];
-            result.pos = getNodePos();
-            var commaStart = -1; // Meaning the previous token was not a comma
-            while (true) {
-                if (isListElement(kind, /*inErrorRecovery*/ false)) {
-                    result.push(parseListElement(kind, parseElement));
-                    commaStart = scanner.getTokenPos();
-                    if (parseOptional(24 /* CommaToken */)) {
-                        continue;
-                    }
-                    commaStart = -1; // Back to the state where the last token was not a comma
-                    if (isListTerminator(kind)) {
-                        break;
-                    }
-                    // We didn't get a comma, and the list wasn't terminated, explicitly parse
-                    // out a comma so we give a good error message.
-                    parseExpected(24 /* CommaToken */);
-                    // If the token was a semicolon, and the caller allows that, then skip it and
-                    // continue.  This ensures we get back on track and don't result in tons of
-                    // parse errors.  For example, this can happen when people do things like use
-                    // a semicolon to delimit object literal members.   Note: we'll have already
-                    // reported an error when we called parseExpected above.
-                    if (considerSemicolonAsDelimiter && token === 23 /* SemicolonToken */ && !scanner.hasPrecedingLineBreak()) {
-                        nextToken();
-                    }
-                    continue;
-                }
-                if (isListTerminator(kind)) {
-                    break;
-                }
-                if (abortParsingListOrMoveToNextToken(kind)) {
-                    break;
-                }
-            }
-            // Recording the trailing comma is deliberately done after the previous
-            // loop, and not just if we see a list terminator. This is because the list
-            // may have ended incorrectly, but it is still important to know if there
-            // was a trailing comma.
-            // Check if the last token was a comma.
-            if (commaStart >= 0) {
-                // Always preserve a trailing comma by marking it on the NodeArray
-                result.hasTrailingComma = true;
-            }
-            result.end = getNodeEnd();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function createMissingList() {
-            var pos = getNodePos();
-            var result = [];
-            result.pos = pos;
-            result.end = pos;
-            return result;
-        }
-        function parseBracketedList(kind, parseElement, open, close) {
-            if (parseExpected(open)) {
-                var result = parseDelimitedList(kind, parseElement);
-                parseExpected(close);
-                return result;
-            }
-            return createMissingList();
-        }
-        // The allowReservedWords parameter controls whether reserved words are permitted after the first dot
-        function parseEntityName(allowReservedWords, diagnosticMessage) {
-            var entity = parseIdentifier(diagnosticMessage);
-            while (parseOptional(21 /* DotToken */)) {
-                var node = createNode(139 /* QualifiedName */, entity.pos); // !!!
-                node.left = entity;
-                node.right = parseRightSideOfDot(allowReservedWords);
-                entity = finishNode(node);
-            }
-            return entity;
-        }
-        function parseRightSideOfDot(allowIdentifierNames) {
-            // Technically a keyword is valid here as all identifiers and keywords are identifier names.
-            // However, often we'll encounter this in error situations when the identifier or keyword
-            // is actually starting another valid construct.
-            //
-            // So, we check for the following specific case:
-            //
-            //      name.
-            //      identifierOrKeyword identifierNameOrKeyword
-            //
-            // Note: the newlines are important here.  For example, if that above code
-            // were rewritten into:
-            //
-            //      name.identifierOrKeyword
-            //      identifierNameOrKeyword
-            //
-            // Then we would consider it valid.  That's because ASI would take effect and
-            // the code would be implicitly: "name.identifierOrKeyword; identifierNameOrKeyword".
-            // In the first case though, ASI will not take effect because there is not a
-            // line terminator after the identifier or keyword.
-            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token)) {
-                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                if (matchesPattern) {
-                    // Report that we need an identifier.  However, report it right after the dot,
-                    // and not on the next token.  This is because the next token might actually
-                    // be an identifier and the error would be quite confusing.
-                    return createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Identifier_expected);
-                }
-            }
-            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
-        }
-        function parseTemplateExpression() {
-            var template = createNode(189 /* TemplateExpression */);
-            template.head = parseTemplateLiteralFragment();
-            ts.Debug.assert(template.head.kind === 12 /* TemplateHead */, "Template head has wrong token kind");
-            var templateSpans = [];
-            templateSpans.pos = getNodePos();
-            do {
-                templateSpans.push(parseTemplateSpan());
-            } while (ts.lastOrUndefined(templateSpans).literal.kind === 13 /* TemplateMiddle */);
-            templateSpans.end = getNodeEnd();
-            template.templateSpans = templateSpans;
-            return finishNode(template);
-        }
-        function parseTemplateSpan() {
-            var span = createNode(197 /* TemplateSpan */);
-            span.expression = allowInAnd(parseExpression);
-            var literal;
-            if (token === 16 /* CloseBraceToken */) {
-                reScanTemplateToken();
-                literal = parseTemplateLiteralFragment();
-            }
-            else {
-                literal = parseExpectedToken(14 /* TemplateTail */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(16 /* CloseBraceToken */));
-            }
-            span.literal = literal;
-            return finishNode(span);
-        }
-        function parseStringLiteralTypeNode() {
-            return parseLiteralLikeNode(166 /* StringLiteralType */, /*internName*/ true);
-        }
-        function parseLiteralNode(internName) {
-            return parseLiteralLikeNode(token, internName);
-        }
-        function parseTemplateLiteralFragment() {
-            return parseLiteralLikeNode(token, /*internName*/ false);
-        }
-        function parseLiteralLikeNode(kind, internName) {
-            var node = createNode(kind);
-            var text = scanner.getTokenValue();
-            node.text = internName ? internIdentifier(text) : text;
-            if (scanner.hasExtendedUnicodeEscape()) {
-                node.hasExtendedUnicodeEscape = true;
-            }
-            if (scanner.isUnterminated()) {
-                node.isUnterminated = true;
-            }
-            var tokenPos = scanner.getTokenPos();
-            nextToken();
-            finishNode(node);
-            // Octal literals are not allowed in strict mode or ES5
-            // Note that theoretically the following condition would hold true literals like 009,
-            // which is not octal.But because of how the scanner separates the tokens, we would
-            // never get a token like this. Instead, we would get 00 and 9 as two separate tokens.
-            // We also do not need to check for negatives because any prefix operator would be part of a
-            // parent unary expression.
-            if (node.kind === 8 /* NumericLiteral */
-                && sourceText.charCodeAt(tokenPos) === 48 /* _0 */
-                && ts.isOctalDigit(sourceText.charCodeAt(tokenPos + 1))) {
-                node.isOctalLiteral = true;
-            }
-            return node;
-        }
-        // TYPES
-        function parseTypeReference() {
-            var typeName = parseEntityName(/*allowReservedWords*/ false, ts.Diagnostics.Type_expected);
-            var node = createNode(155 /* TypeReference */, typeName.pos);
-            node.typeName = typeName;
-            if (!scanner.hasPrecedingLineBreak() && token === 25 /* LessThanToken */) {
-                node.typeArguments = parseBracketedList(18 /* TypeArguments */, parseType, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
-            }
-            return finishNode(node);
-        }
-        function parseThisTypePredicate(lhs) {
-            nextToken();
-            var node = createNode(154 /* TypePredicate */, lhs.pos);
-            node.parameterName = lhs;
-            node.type = parseType();
-            return finishNode(node);
-        }
-        function parseThisTypeNode() {
-            var node = createNode(165 /* ThisType */);
-            nextToken();
-            return finishNode(node);
-        }
-        function parseTypeQuery() {
-            var node = createNode(158 /* TypeQuery */);
-            parseExpected(101 /* TypeOfKeyword */);
-            node.exprName = parseEntityName(/*allowReservedWords*/ true);
-            return finishNode(node);
-        }
-        function parseTypeParameter() {
-            var node = createNode(141 /* TypeParameter */);
-            node.name = parseIdentifier();
-            if (parseOptional(83 /* ExtendsKeyword */)) {
-                // It's not uncommon for people to write improper constraints to a generic.  If the
-                // user writes a constraint that is an expression and not an actual type, then parse
-                // it out as an expression (so we can recover well), but report that a type is needed
-                // instead.
-                if (isStartOfType() || !isStartOfExpression()) {
-                    node.constraint = parseType();
-                }
-                else {
-                    // It was not a type, and it looked like an expression.  Parse out an expression
-                    // here so we recover well.  Note: it is important that we call parseUnaryExpression
-                    // and not parseExpression here.  If the user has:
-                    //
-                    //      <T extends "">
-                    //
-                    // We do *not* want to consume the  >  as we're consuming the expression for "".
-                    node.expression = parseUnaryExpressionOrHigher();
-                }
-            }
-            return finishNode(node);
-        }
-        function parseTypeParameters() {
-            if (token === 25 /* LessThanToken */) {
-                return parseBracketedList(17 /* TypeParameters */, parseTypeParameter, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
-            }
-        }
-        function parseParameterType() {
-            if (parseOptional(54 /* ColonToken */)) {
-                return parseType();
-            }
-            return undefined;
-        }
-        function isStartOfParameter() {
-            return token === 22 /* DotDotDotToken */ || isIdentifierOrPattern() || ts.isModifierKind(token) || token === 55 /* AtToken */ || token === 97 /* ThisKeyword */;
-        }
-        function setModifiers(node, modifiers) {
-            if (modifiers) {
-                node.flags |= modifiers.flags;
-                node.modifiers = modifiers;
-            }
-        }
-        function parseParameter() {
-            var node = createNode(142 /* Parameter */);
-            if (token === 97 /* ThisKeyword */) {
-                node.name = createIdentifier(/*isIdentifier*/ true, undefined);
-                node.type = parseParameterType();
-                return finishNode(node);
-            }
-            node.decorators = parseDecorators();
-            setModifiers(node, parseModifiers());
-            node.dotDotDotToken = parseOptionalToken(22 /* DotDotDotToken */);
-            // FormalParameter [Yield,Await]:
-            //      BindingElement[?Yield,?Await]
-            node.name = parseIdentifierOrPattern();
-            if (ts.getFullWidth(node.name) === 0 && node.flags === 0 && ts.isModifierKind(token)) {
-                // in cases like
-                // 'use strict'
-                // function foo(static)
-                // isParameter('static') === true, because of isModifier('static')
-                // however 'static' is not a legal identifier in a strict mode.
-                // so result of this function will be ParameterDeclaration (flags = 0, name = missing, type = undefined, initializer = undefined)
-                // and current token will not change => parsing of the enclosing parameter list will last till the end of time (or OOM)
-                // to avoid this we'll advance cursor to the next token.
-                nextToken();
-            }
-            node.questionToken = parseOptionalToken(53 /* QuestionToken */);
-            node.type = parseParameterType();
-            node.initializer = parseBindingElementInitializer(/*inParameter*/ true);
-            // Do not check for initializers in an ambient context for parameters. This is not
-            // a grammar error because the grammar allows arbitrary call signatures in
-            // an ambient context.
-            // It is actually not necessary for this to be an error at all. The reason is that
-            // function/constructor implementations are syntactically disallowed in ambient
-            // contexts. In addition, parameter initializers are semantically disallowed in
-            // overload signatures. So parameter initializers are transitively disallowed in
-            // ambient contexts.
-            return addJSDocComment(finishNode(node));
-        }
-        function parseBindingElementInitializer(inParameter) {
-            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
-        }
-        function parseParameterInitializer() {
-            return parseInitializer(/*inParameter*/ true);
-        }
-        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
-            var returnTokenRequired = returnToken === 34 /* EqualsGreaterThanToken */;
-            signature.typeParameters = parseTypeParameters();
-            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
-            if (returnTokenRequired) {
-                parseExpected(returnToken);
-                signature.type = parseTypeOrTypePredicate();
-            }
-            else if (parseOptional(returnToken)) {
-                signature.type = parseTypeOrTypePredicate();
-            }
-        }
-        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
-            // FormalParameters [Yield,Await]: (modified)
-            //      [empty]
-            //      FormalParameterList[?Yield,Await]
-            //
-            // FormalParameter[Yield,Await]: (modified)
-            //      BindingElement[?Yield,Await]
-            //
-            // BindingElement [Yield,Await]: (modified)
-            //      SingleNameBinding[?Yield,?Await]
-            //      BindingPattern[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
-            //
-            // SingleNameBinding [Yield,Await]:
-            //      BindingIdentifier[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
-            if (parseExpected(17 /* OpenParenToken */)) {
-                var savedYieldContext = inYieldContext();
-                var savedAwaitContext = inAwaitContext();
-                setYieldContext(yieldContext);
-                setAwaitContext(awaitContext);
-                var result = parseDelimitedList(16 /* Parameters */, parseParameter);
-                setYieldContext(savedYieldContext);
-                setAwaitContext(savedAwaitContext);
-                if (!parseExpected(18 /* CloseParenToken */) && requireCompleteParameterList) {
-                    // Caller insisted that we had to end with a )   We didn't.  So just return
-                    // undefined here.
-                    return undefined;
-                }
-                return result;
-            }
-            // We didn't even have an open paren.  If the caller requires a complete parameter list,
-            // we definitely can't provide that.  However, if they're ok with an incomplete one,
-            // then just return an empty set of parameters.
-            return requireCompleteParameterList ? undefined : createMissingList();
-        }
-        function parseTypeMemberSemicolon() {
-            // We allow type members to be separated by commas or (possibly ASI) semicolons.
-            // First check if it was a comma.  If so, we're done with the member.
-            if (parseOptional(24 /* CommaToken */)) {
-                return;
-            }
-            // Didn't have a comma.  We must have a (possible ASI) semicolon.
-            parseSemicolon();
-        }
-        function parseSignatureMember(kind) {
-            var node = createNode(kind);
-            if (kind === 152 /* ConstructSignature */) {
-                parseExpected(92 /* NewKeyword */);
-            }
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            parseTypeMemberSemicolon();
-            return finishNode(node);
-        }
-        function isIndexSignature() {
-            if (token !== 19 /* OpenBracketToken */) {
-                return false;
-            }
-            return lookAhead(isUnambiguouslyIndexSignature);
-        }
-        function isUnambiguouslyIndexSignature() {
-            // The only allowed sequence is:
-            //
-            //   [id:
-            //
-            // However, for error recovery, we also check the following cases:
-            //
-            //   [...
-            //   [id,
-            //   [id?,
-            //   [id?:
-            //   [id?]
-            //   [public id
-            //   [private id
-            //   [protected id
-            //   []
-            //
-            nextToken();
-            if (token === 22 /* DotDotDotToken */ || token === 20 /* CloseBracketToken */) {
-                return true;
-            }
-            if (ts.isModifierKind(token)) {
-                nextToken();
-                if (isIdentifier()) {
-                    return true;
-                }
-            }
-            else if (!isIdentifier()) {
-                return false;
-            }
-            else {
-                // Skip the identifier
-                nextToken();
-            }
-            // A colon signifies a well formed indexer
-            // A comma should be a badly formed indexer because comma expressions are not allowed
-            // in computed properties.
-            if (token === 54 /* ColonToken */ || token === 24 /* CommaToken */) {
-                return true;
-            }
-            // Question mark could be an indexer with an optional property,
-            // or it could be a conditional expression in a computed property.
-            if (token !== 53 /* QuestionToken */) {
-                return false;
-            }
-            // If any of the following tokens are after the question mark, it cannot
-            // be a conditional expression, so treat it as an indexer.
-            nextToken();
-            return token === 54 /* ColonToken */ || token === 24 /* CommaToken */ || token === 20 /* CloseBracketToken */;
-        }
-        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(153 /* IndexSignature */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.parameters = parseBracketedList(16 /* Parameters */, parseParameter, 19 /* OpenBracketToken */, 20 /* CloseBracketToken */);
-            node.type = parseTypeAnnotation();
-            parseTypeMemberSemicolon();
-            return finishNode(node);
-        }
-        function parsePropertyOrMethodSignature(fullStart, modifiers) {
-            var name = parsePropertyName();
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
-                var method = createNode(146 /* MethodSignature */, fullStart);
-                setModifiers(method, modifiers);
-                method.name = name;
-                method.questionToken = questionToken;
-                // Method signatures don't exist in expression contexts.  So they have neither
-                // [Yield] nor [Await]
-                fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, method);
-                parseTypeMemberSemicolon();
-                return finishNode(method);
-            }
-            else {
-                var property = createNode(144 /* PropertySignature */, fullStart);
-                setModifiers(property, modifiers);
-                property.name = name;
-                property.questionToken = questionToken;
-                property.type = parseTypeAnnotation();
-                if (token === 56 /* EqualsToken */) {
-                    // Although type literal properties cannot not have initializers, we attempt
-                    // to parse an initializer so we can report in the checker that an interface
-                    // property or type literal property cannot have an initializer.
-                    property.initializer = parseNonParameterInitializer();
-                }
-                parseTypeMemberSemicolon();
-                return finishNode(property);
-            }
-        }
-        function isTypeMemberStart() {
-            var idToken;
-            // Return true if we have the start of a signature member
-            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
-                return true;
-            }
-            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier
-            while (ts.isModifierKind(token)) {
-                idToken = token;
-                nextToken();
-            }
-            // Index signatures and computed property names are type members
-            if (token === 19 /* OpenBracketToken */) {
-                return true;
-            }
-            // Try to get the first property-like token following all modifiers
-            if (isLiteralPropertyName()) {
-                idToken = token;
-                nextToken();
-            }
-            // If we were able to get any potential identifier, check that it is
-            // the start of a member declaration
-            if (idToken) {
-                return token === 17 /* OpenParenToken */ ||
-                    token === 25 /* LessThanToken */ ||
-                    token === 53 /* QuestionToken */ ||
-                    token === 54 /* ColonToken */ ||
-                    canParseSemicolon();
-            }
-            return false;
-        }
-        function parseTypeMember() {
-            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
-                return parseSignatureMember(151 /* CallSignature */);
-            }
-            if (token === 92 /* NewKeyword */ && lookAhead(isStartOfConstructSignature)) {
-                return parseSignatureMember(152 /* ConstructSignature */);
-            }
-            var fullStart = getNodePos();
-            var modifiers = parseModifiers();
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, /*decorators*/ undefined, modifiers);
-            }
-            return parsePropertyOrMethodSignature(fullStart, modifiers);
-        }
-        function isStartOfConstructSignature() {
-            nextToken();
-            return token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */;
-        }
-        function parseTypeLiteral() {
-            var node = createNode(159 /* TypeLiteral */);
-            node.members = parseObjectTypeMembers();
-            return finishNode(node);
-        }
-        function parseObjectTypeMembers() {
-            var members;
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                members = parseList(4 /* TypeMembers */, parseTypeMember);
-                parseExpected(16 /* CloseBraceToken */);
-            }
-            else {
-                members = createMissingList();
-            }
-            return members;
-        }
-        function parseTupleType() {
-            var node = createNode(161 /* TupleType */);
-            node.elementTypes = parseBracketedList(19 /* TupleElementTypes */, parseType, 19 /* OpenBracketToken */, 20 /* CloseBracketToken */);
-            return finishNode(node);
-        }
-        function parseParenthesizedType() {
-            var node = createNode(164 /* ParenthesizedType */);
-            parseExpected(17 /* OpenParenToken */);
-            node.type = parseType();
-            parseExpected(18 /* CloseParenToken */);
-            return finishNode(node);
-        }
-        function parseFunctionOrConstructorType(kind) {
-            var node = createNode(kind);
-            if (kind === 157 /* ConstructorType */) {
-                parseExpected(92 /* NewKeyword */);
-            }
-            fillSignature(34 /* EqualsGreaterThanToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            return finishNode(node);
-        }
-        function parseKeywordAndNoDot() {
-            var node = parseTokenNode();
-            return token === 21 /* DotToken */ ? undefined : node;
-        }
-        function parseNonArrayType() {
-            switch (token) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 127 /* NeverKeyword */:
-                    // If these are followed by a dot, then parse these out as a dotted type reference instead.
-                    var node = tryParse(parseKeywordAndNoDot);
-                    return node || parseTypeReference();
-                case 9 /* StringLiteral */:
-                    return parseStringLiteralTypeNode();
-                case 103 /* VoidKeyword */:
-                case 93 /* NullKeyword */:
-                    return parseTokenNode();
-                case 97 /* ThisKeyword */: {
-                    var thisKeyword = parseThisTypeNode();
-                    if (token === 124 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
-                        return parseThisTypePredicate(thisKeyword);
-                    }
-                    else {
-                        return thisKeyword;
-                    }
-                }
-                case 101 /* TypeOfKeyword */:
-                    return parseTypeQuery();
-                case 15 /* OpenBraceToken */:
-                    return parseTypeLiteral();
-                case 19 /* OpenBracketToken */:
-                    return parseTupleType();
-                case 17 /* OpenParenToken */:
-                    return parseParenthesizedType();
-                default:
-                    return parseTypeReference();
-            }
-        }
-        function isStartOfType() {
-            switch (token) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 103 /* VoidKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 93 /* NullKeyword */:
-                case 97 /* ThisKeyword */:
-                case 101 /* TypeOfKeyword */:
-                case 127 /* NeverKeyword */:
-                case 15 /* OpenBraceToken */:
-                case 19 /* OpenBracketToken */:
-                case 25 /* LessThanToken */:
-                case 92 /* NewKeyword */:
-                case 9 /* StringLiteral */:
-                    return true;
-                case 17 /* OpenParenToken */:
-                    // Only consider '(' the start of a type if followed by ')', '...', an identifier, a modifier,
-                    // or something that starts a type. We don't want to consider things like '(1)' a type.
-                    return lookAhead(isStartOfParenthesizedOrFunctionType);
-                default:
-                    return isIdentifier();
-            }
-        }
-        function isStartOfParenthesizedOrFunctionType() {
-            nextToken();
-            return token === 18 /* CloseParenToken */ || isStartOfParameter() || isStartOfType();
-        }
-        function parseArrayTypeOrHigher() {
-            var type = parseNonArrayType();
-            while (!scanner.hasPrecedingLineBreak() && parseOptional(19 /* OpenBracketToken */)) {
-                parseExpected(20 /* CloseBracketToken */);
-                var node = createNode(160 /* ArrayType */, type.pos);
-                node.elementType = type;
-                type = finishNode(node);
-            }
-            return type;
-        }
-        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
-            var type = parseConstituentType();
-            if (token === operator) {
-                var types = [type];
-                types.pos = type.pos;
-                while (parseOptional(operator)) {
-                    types.push(parseConstituentType());
-                }
-                types.end = getNodeEnd();
-                var node = createNode(kind, type.pos);
-                node.types = types;
-                type = finishNode(node);
-            }
-            return type;
-        }
-        function parseIntersectionTypeOrHigher() {
-            return parseUnionOrIntersectionType(163 /* IntersectionType */, parseArrayTypeOrHigher, 46 /* AmpersandToken */);
-        }
-        function parseUnionTypeOrHigher() {
-            return parseUnionOrIntersectionType(162 /* UnionType */, parseIntersectionTypeOrHigher, 47 /* BarToken */);
-        }
-        function isStartOfFunctionType() {
-            if (token === 25 /* LessThanToken */) {
-                return true;
-            }
-            return token === 17 /* OpenParenToken */ && lookAhead(isUnambiguouslyStartOfFunctionType);
-        }
-        function skipParameterStart() {
-            if (ts.isModifierKind(token)) {
-                // Skip modifiers
-                parseModifiers();
-            }
-            if (isIdentifier() || token === 97 /* ThisKeyword */) {
-                nextToken();
-                return true;
-            }
-            if (token === 19 /* OpenBracketToken */ || token === 15 /* OpenBraceToken */) {
-                // Return true if we can parse an array or object binding pattern with no errors
-                var previousErrorCount = parseDiagnostics.length;
-                parseIdentifierOrPattern();
-                return previousErrorCount === parseDiagnostics.length;
-            }
-            return false;
-        }
-        function isUnambiguouslyStartOfFunctionType() {
-            nextToken();
-            if (token === 18 /* CloseParenToken */ || token === 22 /* DotDotDotToken */) {
-                // ( )
-                // ( ...
-                return true;
-            }
-            if (skipParameterStart()) {
-                // We successfully skipped modifiers (if any) and an identifier or binding pattern,
-                // now see if we have something that indicates a parameter declaration
-                if (token === 54 /* ColonToken */ || token === 24 /* CommaToken */ ||
-                    token === 53 /* QuestionToken */ || token === 56 /* EqualsToken */) {
-                    // ( xxx :
-                    // ( xxx ,
-                    // ( xxx ?
-                    // ( xxx =
-                    return true;
-                }
-                if (token === 18 /* CloseParenToken */) {
-                    nextToken();
-                    if (token === 34 /* EqualsGreaterThanToken */) {
-                        // ( xxx ) =>
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function parseTypeOrTypePredicate() {
-            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
-            var type = parseType();
-            if (typePredicateVariable) {
-                var node = createNode(154 /* TypePredicate */, typePredicateVariable.pos);
-                node.parameterName = typePredicateVariable;
-                node.type = type;
-                return finishNode(node);
-            }
-            else {
-                return type;
-            }
-        }
-        function parseTypePredicatePrefix() {
-            var id = parseIdentifier();
-            if (token === 124 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
-                nextToken();
-                return id;
-            }
-        }
-        function parseType() {
-            // The rules about 'yield' only apply to actual code/expression contexts.  They don't
-            // apply to 'type' contexts.  So we disable these parameters here before moving on.
-            return doOutsideOfContext(41943040 /* TypeExcludesFlags */, parseTypeWorker);
-        }
-        function parseTypeWorker() {
-            if (isStartOfFunctionType()) {
-                return parseFunctionOrConstructorType(156 /* FunctionType */);
-            }
-            if (token === 92 /* NewKeyword */) {
-                return parseFunctionOrConstructorType(157 /* ConstructorType */);
-            }
-            return parseUnionTypeOrHigher();
-        }
-        function parseTypeAnnotation() {
-            return parseOptional(54 /* ColonToken */) ? parseType() : undefined;
-        }
-        // EXPRESSIONS
-        function isStartOfLeftHandSideExpression() {
-            switch (token) {
-                case 97 /* ThisKeyword */:
-                case 95 /* SuperKeyword */:
-                case 93 /* NullKeyword */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                case 8 /* NumericLiteral */:
-                case 9 /* StringLiteral */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                case 12 /* TemplateHead */:
-                case 17 /* OpenParenToken */:
-                case 19 /* OpenBracketToken */:
-                case 15 /* OpenBraceToken */:
-                case 87 /* FunctionKeyword */:
-                case 73 /* ClassKeyword */:
-                case 92 /* NewKeyword */:
-                case 39 /* SlashToken */:
-                case 61 /* SlashEqualsToken */:
-                case 69 /* Identifier */:
-                    return true;
-                default:
-                    return isIdentifier();
-            }
-        }
-        function isStartOfExpression() {
-            if (isStartOfLeftHandSideExpression()) {
-                return true;
-            }
-            switch (token) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                case 78 /* DeleteKeyword */:
-                case 101 /* TypeOfKeyword */:
-                case 103 /* VoidKeyword */:
-                case 41 /* PlusPlusToken */:
-                case 42 /* MinusMinusToken */:
-                case 25 /* LessThanToken */:
-                case 119 /* AwaitKeyword */:
-                case 114 /* YieldKeyword */:
-                    // Yield/await always starts an expression.  Either it is an identifier (in which case
-                    // it is definitely an expression).  Or it's a keyword (either because we're in
-                    // a generator or async function, or in strict mode (or both)) and it started a yield or await expression.
-                    return true;
-                default:
-                    // Error tolerance.  If we see the start of some binary operator, we consider
-                    // that the start of an expression.  That way we'll parse out a missing identifier,
-                    // give a good message about an identifier being missing, and then consume the
-                    // rest of the binary expression.
-                    if (isBinaryOperator()) {
-                        return true;
-                    }
-                    return isIdentifier();
-            }
-        }
-        function isStartOfExpressionStatement() {
-            // As per the grammar, none of '{' or 'function' or 'class' can start an expression statement.
-            return token !== 15 /* OpenBraceToken */ &&
-                token !== 87 /* FunctionKeyword */ &&
-                token !== 73 /* ClassKeyword */ &&
-                token !== 55 /* AtToken */ &&
-                isStartOfExpression();
-        }
-        function parseExpression() {
-            // Expression[in]:
-            //      AssignmentExpression[in]
-            //      Expression[in] , AssignmentExpression[in]
-            // clear the decorator context when parsing Expression, as it should be unambiguous when parsing a decorator
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
-            }
-            var expr = parseAssignmentExpressionOrHigher();
-            var operatorToken;
-            while ((operatorToken = parseOptionalToken(24 /* CommaToken */))) {
-                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
-            }
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
-            }
-            return expr;
-        }
-        function parseInitializer(inParameter) {
-            if (token !== 56 /* EqualsToken */) {
-                // It's not uncommon during typing for the user to miss writing the '=' token.  Check if
-                // there is no newline after the last token and if we're on an expression.  If so, parse
-                // this as an equals-value clause with a missing equals.
-                // NOTE: There are two places where we allow equals-value clauses.  The first is in a
-                // variable declarator.  The second is with a parameter.  For variable declarators
-                // it's more likely that a { would be a allowed (as an object literal).  While this
-                // is also allowed for parameters, the risk is that we consume the { as an object
-                // literal when it really will be for the block following the parameter.
-                if (scanner.hasPrecedingLineBreak() || (inParameter && token === 15 /* OpenBraceToken */) || !isStartOfExpression()) {
-                    // preceding line break, open brace in a parameter (likely a function body) or current token is not an expression -
-                    // do not try to parse initializer
-                    return undefined;
-                }
-            }
-            // Initializer[In, Yield] :
-            //     = AssignmentExpression[?In, ?Yield]
-            parseExpected(56 /* EqualsToken */);
-            return parseAssignmentExpressionOrHigher();
-        }
-        function parseAssignmentExpressionOrHigher() {
-            //  AssignmentExpression[in,yield]:
-            //      1) ConditionalExpression[?in,?yield]
-            //      2) LeftHandSideExpression = AssignmentExpression[?in,?yield]
-            //      3) LeftHandSideExpression AssignmentOperator AssignmentExpression[?in,?yield]
-            //      4) ArrowFunctionExpression[?in,?yield]
-            //      5) AsyncArrowFunctionExpression[in,yield,await]
-            //      6) [+Yield] YieldExpression[?In]
-            //
-            // Note: for ease of implementation we treat productions '2' and '3' as the same thing.
-            // (i.e. they're both BinaryExpressions with an assignment operator in it).
-            // First, do the simple check if we have a YieldExpression (production '5').
-            if (isYieldExpression()) {
-                return parseYieldExpression();
-            }
-            // Then, check if we have an arrow function (production '4' and '5') that starts with a parenthesized
-            // parameter list or is an async arrow function.
-            // AsyncArrowFunctionExpression:
-            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
-            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
-            // Production (1) of AsyncArrowFunctionExpression is parsed in "tryParseAsyncSimpleArrowFunctionExpression".
-            // And production (2) is parsed in "tryParseParenthesizedArrowFunctionExpression". 
-            //
-            // If we do successfully parse arrow-function, we must *not* recurse for productions 1, 2 or 3. An ArrowFunction is
-            // not a  LeftHandSideExpression, nor does it start a ConditionalExpression.  So we are done
-            // with AssignmentExpression if we see one.
-            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
-            if (arrowExpression) {
-                return arrowExpression;
-            }
-            // Now try to see if we're in production '1', '2' or '3'.  A conditional expression can
-            // start with a LogicalOrExpression, while the assignment productions can only start with
-            // LeftHandSideExpressions.
-            //
-            // So, first, we try to just parse out a BinaryExpression.  If we get something that is a
-            // LeftHandSide or higher, then we can try to parse out the assignment expression part.
-            // Otherwise, we try to parse out the conditional expression bit.  We want to allow any
-            // binary expression here, so we pass in the 'lowest' precedence here so that it matches
-            // and consumes anything.
-            var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-            // To avoid a look-ahead, we did not handle the case of an arrow function with a single un-parenthesized
-            // parameter ('x => ...') above. We handle it here by checking if the parsed expression was a single
-            // identifier and the current token is an arrow.
-            if (expr.kind === 69 /* Identifier */ && token === 34 /* EqualsGreaterThanToken */) {
-                return parseSimpleArrowFunctionExpression(expr);
-            }
-            // Now see if we might be in cases '2' or '3'.
-            // If the expression was a LHS expression, and we have an assignment operator, then
-            // we're in '2' or '3'. Consume the assignment and return.
-            //
-            // Note: we call reScanGreaterToken so that we get an appropriately merged token
-            // for cases like > > =  becoming >>=
-            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
-                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
-            }
-            // It wasn't an assignment or a lambda.  This is a conditional expression:
-            return parseConditionalExpressionRest(expr);
-        }
-        function isYieldExpression() {
-            if (token === 114 /* YieldKeyword */) {
-                // If we have a 'yield' keyword, and this is a context where yield expressions are
-                // allowed, then definitely parse out a yield expression.
-                if (inYieldContext()) {
-                    return true;
-                }
-                // We're in a context where 'yield expr' is not allowed.  However, if we can
-                // definitely tell that the user was trying to parse a 'yield expr' and not
-                // just a normal expr that start with a 'yield' identifier, then parse out
-                // a 'yield expr'.  We can then report an error later that they are only
-                // allowed in generator expressions.
-                //
-                // for example, if we see 'yield(foo)', then we'll have to treat that as an
-                // invocation expression of something called 'yield'.  However, if we have
-                // 'yield foo' then that is not legal as a normal expression, so we can
-                // definitely recognize this as a yield expression.
-                //
-                // for now we just check if the next token is an identifier.  More heuristics
-                // can be added here later as necessary.  We just need to make sure that we
-                // don't accidentally consume something legal.
-                return lookAhead(nextTokenIsIdentifierOrKeywordOrNumberOnSameLine);
-            }
-            return false;
-        }
-        function nextTokenIsIdentifierOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && isIdentifier();
-        }
-        function parseYieldExpression() {
-            var node = createNode(190 /* YieldExpression */);
-            // YieldExpression[In] :
-            //      yield
-            //      yield [no LineTerminator here] [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
-            //      yield [no LineTerminator here] * [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
-            nextToken();
-            if (!scanner.hasPrecedingLineBreak() &&
-                (token === 37 /* AsteriskToken */ || isStartOfExpression())) {
-                node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-                node.expression = parseAssignmentExpressionOrHigher();
-                return finishNode(node);
-            }
-            else {
-                // if the next token is not on the same line as yield.  or we don't have an '*' or
-                // the start of an expression, then this is just a simple "yield" expression.
-                return finishNode(node);
-            }
-        }
-        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
-            ts.Debug.assert(token === 34 /* EqualsGreaterThanToken */, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
-            var node;
-            if (asyncModifier) {
-                node = createNode(180 /* ArrowFunction */, asyncModifier.pos);
-                setModifiers(node, asyncModifier);
-            }
-            else {
-                node = createNode(180 /* ArrowFunction */, identifier.pos);
-            }
-            var parameter = createNode(142 /* Parameter */, identifier.pos);
-            parameter.name = identifier;
-            finishNode(parameter);
-            node.parameters = [parameter];
-            node.parameters.pos = parameter.pos;
-            node.parameters.end = parameter.end;
-            node.equalsGreaterThanToken = parseExpectedToken(34 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
-            node.body = parseArrowFunctionExpressionBody(/*isAsync*/ !!asyncModifier);
-            return finishNode(node);
-        }
-        function tryParseParenthesizedArrowFunctionExpression() {
-            var triState = isParenthesizedArrowFunctionExpression();
-            if (triState === 0 /* False */) {
-                // It's definitely not a parenthesized arrow function expression.
-                return undefined;
-            }
-            // If we definitely have an arrow function, then we can just parse one, not requiring a
-            // following => or { token. Otherwise, we *might* have an arrow function.  Try to parse
-            // it out, but don't allow any ambiguity, and return 'undefined' if this could be an
-            // expression instead.
-            var arrowFunction = triState === 1 /* True */
-                ? parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ true)
-                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
-            if (!arrowFunction) {
-                // Didn't appear to actually be a parenthesized arrow function.  Just bail out.
-                return undefined;
-            }
-            var isAsync = !!(arrowFunction.flags & 256 /* Async */);
-            // If we have an arrow, then try to parse the body. Even if not, try to parse if we
-            // have an opening brace, just in case we're in an error state.
-            var lastToken = token;
-            arrowFunction.equalsGreaterThanToken = parseExpectedToken(34 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
-            arrowFunction.body = (lastToken === 34 /* EqualsGreaterThanToken */ || lastToken === 15 /* OpenBraceToken */)
-                ? parseArrowFunctionExpressionBody(isAsync)
-                : parseIdentifier();
-            return finishNode(arrowFunction);
-        }
-        //  True        -> We definitely expect a parenthesized arrow function here.
-        //  False       -> There *cannot* be a parenthesized arrow function here.
-        //  Unknown     -> There *might* be a parenthesized arrow function here.
-        //                 Speculatively look ahead to be sure, and rollback if not.
-        function isParenthesizedArrowFunctionExpression() {
-            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */ || token === 118 /* AsyncKeyword */) {
-                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
-            }
-            if (token === 34 /* EqualsGreaterThanToken */) {
-                // ERROR RECOVERY TWEAK:
-                // If we see a standalone => try to parse it as an arrow function expression as that's
-                // likely what the user intended to write.
-                return 1 /* True */;
-            }
-            // Definitely not a parenthesized arrow function.
-            return 0 /* False */;
-        }
-        function isParenthesizedArrowFunctionExpressionWorker() {
-            if (token === 118 /* AsyncKeyword */) {
-                nextToken();
-                if (scanner.hasPrecedingLineBreak()) {
-                    return 0 /* False */;
-                }
-                if (token !== 17 /* OpenParenToken */ && token !== 25 /* LessThanToken */) {
-                    return 0 /* False */;
-                }
-            }
-            var first = token;
-            var second = nextToken();
-            if (first === 17 /* OpenParenToken */) {
-                if (second === 18 /* CloseParenToken */) {
-                    // Simple cases: "() =>", "(): ", and  "() {".
-                    // This is an arrow function with no parameters.
-                    // The last one is not actually an arrow function,
-                    // but this is probably what the user intended.
-                    var third = nextToken();
-                    switch (third) {
-                        case 34 /* EqualsGreaterThanToken */:
-                        case 54 /* ColonToken */:
-                        case 15 /* OpenBraceToken */:
-                            return 1 /* True */;
-                        default:
-                            return 0 /* False */;
-                    }
-                }
-                // If encounter "([" or "({", this could be the start of a binding pattern.
-                // Examples:
-                //      ([ x ]) => { }
-                //      ({ x }) => { }
-                //      ([ x ])
-                //      ({ x })
-                if (second === 19 /* OpenBracketToken */ || second === 15 /* OpenBraceToken */) {
-                    return 2 /* Unknown */;
-                }
-                // Simple case: "(..."
-                // This is an arrow function with a rest parameter.
-                if (second === 22 /* DotDotDotToken */) {
-                    return 1 /* True */;
-                }
-                // If we had "(" followed by something that's not an identifier,
-                // then this definitely doesn't look like a lambda.
-                // Note: we could be a little more lenient and allow
-                // "(public" or "(private". These would not ever actually be allowed,
-                // but we could provide a good error message instead of bailing out.
-                if (!isIdentifier()) {
-                    return 0 /* False */;
-                }
-                // If we have something like "(a:", then we must have a
-                // type-annotated parameter in an arrow function expression.
-                if (nextToken() === 54 /* ColonToken */) {
-                    return 1 /* True */;
-                }
-                // This *could* be a parenthesized arrow function.
-                // Return Unknown to let the caller know.
-                return 2 /* Unknown */;
-            }
-            else {
-                ts.Debug.assert(first === 25 /* LessThanToken */);
-                // If we have "<" not followed by an identifier,
-                // then this definitely is not an arrow function.
-                if (!isIdentifier()) {
-                    return 0 /* False */;
-                }
-                // JSX overrides
-                if (sourceFile.languageVariant === 1 /* JSX */) {
-                    var isArrowFunctionInJsx = lookAhead(function () {
-                        var third = nextToken();
-                        if (third === 83 /* ExtendsKeyword */) {
-                            var fourth = nextToken();
-                            switch (fourth) {
-                                case 56 /* EqualsToken */:
-                                case 27 /* GreaterThanToken */:
-                                    return false;
-                                default:
-                                    return true;
-                            }
-                        }
-                        else if (third === 24 /* CommaToken */) {
-                            return true;
-                        }
-                        return false;
-                    });
-                    if (isArrowFunctionInJsx) {
-                        return 1 /* True */;
-                    }
-                    return 0 /* False */;
-                }
-                // This *could* be a parenthesized arrow function.
-                return 2 /* Unknown */;
-            }
-        }
-        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
-            return parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ false);
-        }
-        function tryParseAsyncSimpleArrowFunctionExpression() {
-            // We do a check here so that we won't be doing unnecessarily call to "lookAhead"
-            if (token === 118 /* AsyncKeyword */) {
-                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
-                if (isUnParenthesizedAsyncArrowFunction === 1 /* True */) {
-                    var asyncModifier = parseModifiersForArrowFunction();
-                    var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
-                }
-            }
-            return undefined;
-        }
-        function isUnParenthesizedAsyncArrowFunctionWorker() {
-            // AsyncArrowFunctionExpression:
-            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
-            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
-            if (token === 118 /* AsyncKeyword */) {
-                nextToken();
-                // If the "async" is followed by "=>" token then it is not a begining of an async arrow-function
-                // but instead a simple arrow-function which will be parsed inside "parseAssignmentExpressionOrHigher"
-                if (scanner.hasPrecedingLineBreak() || token === 34 /* EqualsGreaterThanToken */) {
-                    return 0 /* False */;
-                }
-                // Check for un-parenthesized AsyncArrowFunction
-                var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
-                if (!scanner.hasPrecedingLineBreak() && expr.kind === 69 /* Identifier */ && token === 34 /* EqualsGreaterThanToken */) {
-                    return 1 /* True */;
-                }
-            }
-            return 0 /* False */;
-        }
-        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
-            var node = createNode(180 /* ArrowFunction */);
-            setModifiers(node, parseModifiersForArrowFunction());
-            var isAsync = !!(node.flags & 256 /* Async */);
-            // Arrow functions are never generators.
-            //
-            // If we're speculatively parsing a signature for a parenthesized arrow function, then
-            // we have to have a complete parameter list.  Otherwise we might see something like
-            // a => (b => c)
-            // And think that "(b =>" was actually a parenthesized arrow function with a missing
-            // close paren.
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ !allowAmbiguity, node);
-            // If we couldn't get parameters, we definitely could not parse out an arrow function.
-            if (!node.parameters) {
-                return undefined;
-            }
-            // Parsing a signature isn't enough.
-            // Parenthesized arrow signatures often look like other valid expressions.
-            // For instance:
-            //  - "(x = 10)" is an assignment expression parsed as a signature with a default parameter value.
-            //  - "(x,y)" is a comma expression parsed as a signature with two parameters.
-            //  - "a ? (b): c" will have "(b):" parsed as a signature with a return type annotation.
-            //
-            // So we need just a bit of lookahead to ensure that it can only be a signature.
-            if (!allowAmbiguity && token !== 34 /* EqualsGreaterThanToken */ && token !== 15 /* OpenBraceToken */) {
-                // Returning undefined here will cause our caller to rewind to where we started from.
-                return undefined;
-            }
-            return node;
-        }
-        function parseArrowFunctionExpressionBody(isAsync) {
-            if (token === 15 /* OpenBraceToken */) {
-                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
-            }
-            if (token !== 23 /* SemicolonToken */ &&
-                token !== 87 /* FunctionKeyword */ &&
-                token !== 73 /* ClassKeyword */ &&
-                isStartOfStatement() &&
-                !isStartOfExpressionStatement()) {
-                // Check if we got a plain statement (i.e. no expression-statements, no function/class expressions/declarations)
-                //
-                // Here we try to recover from a potential error situation in the case where the
-                // user meant to supply a block. For example, if the user wrote:
-                //
-                //  a =>
-                //      let v = 0;
-                //  }
-                //
-                // they may be missing an open brace.  Check to see if that's the case so we can
-                // try to recover better.  If we don't do this, then the next close curly we see may end
-                // up preemptively closing the containing construct.
-                //
-                // Note: even when 'ignoreMissingOpenBrace' is passed as true, parseBody will still error.
-                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ true);
-            }
-            return isAsync
-                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
-                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
-        }
-        function parseConditionalExpressionRest(leftOperand) {
-            // Note: we are passed in an expression which was produced from parseBinaryExpressionOrHigher.
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (!questionToken) {
-                return leftOperand;
-            }
-            // Note: we explicitly 'allowIn' in the whenTrue part of the condition expression, and
-            // we do not that for the 'whenFalse' part.
-            var node = createNode(188 /* ConditionalExpression */, leftOperand.pos);
-            node.condition = leftOperand;
-            node.questionToken = questionToken;
-            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
-            node.colonToken = parseExpectedToken(54 /* ColonToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(54 /* ColonToken */));
-            node.whenFalse = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
-        }
-        function parseBinaryExpressionOrHigher(precedence) {
-            var leftOperand = parseUnaryExpressionOrHigher();
-            return parseBinaryExpressionRest(precedence, leftOperand);
-        }
-        function isInOrOfKeyword(t) {
-            return t === 90 /* InKeyword */ || t === 138 /* OfKeyword */;
-        }
-        function parseBinaryExpressionRest(precedence, leftOperand) {
-            while (true) {
-                // We either have a binary operator here, or we're finished.  We call
-                // reScanGreaterToken so that we merge token sequences like > and = into >=
-                reScanGreaterToken();
-                var newPrecedence = getBinaryOperatorPrecedence();
-                // Check the precedence to see if we should "take" this operator
-                // - For left associative operator (all operator but **), consume the operator,
-                //   recursively call the function below, and parse binaryExpression as a rightOperand
-                //   of the caller if the new precedence of the operator is greater then or equal to the current precedence.
-                //   For example:
-                //      a - b - c;
-                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
-                //      a * b - c
-                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
-                //      a - b * c;
-                //            ^token; leftOperand = b. Return b * c to the caller as a rightOperand
-                // - For right associative operator (**), consume the operator, recursively call the function
-                //   and parse binaryExpression as a rightOperand of the caller if the new precedence of
-                //   the operator is strictly grater than the current precedence
-                //   For example:
-                //      a ** b ** c;
-                //             ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
-                //      a - b ** c;
-                //            ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
-                //      a ** b - c
-                //             ^token; leftOperand = b. Return b to the caller as a rightOperand
-                var consumeCurrentOperator = token === 38 /* AsteriskAsteriskToken */ ?
-                    newPrecedence >= precedence :
-                    newPrecedence > precedence;
-                if (!consumeCurrentOperator) {
-                    break;
-                }
-                if (token === 90 /* InKeyword */ && inDisallowInContext()) {
-                    break;
-                }
-                if (token === 116 /* AsKeyword */) {
-                    // Make sure we *do* perform ASI for constructs like this:
-                    //    var x = foo
-                    //    as (Bar)
-                    // This should be parsed as an initialized variable, followed
-                    // by a function call to 'as' with the argument 'Bar'
-                    if (scanner.hasPrecedingLineBreak()) {
-                        break;
-                    }
-                    else {
-                        nextToken();
-                        leftOperand = makeAsExpression(leftOperand, parseType());
-                    }
-                }
-                else {
-                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
-                }
-            }
-            return leftOperand;
-        }
-        function isBinaryOperator() {
-            if (inDisallowInContext() && token === 90 /* InKeyword */) {
-                return false;
-            }
-            return getBinaryOperatorPrecedence() > 0;
-        }
-        function getBinaryOperatorPrecedence() {
-            switch (token) {
-                case 52 /* BarBarToken */:
-                    return 1;
-                case 51 /* AmpersandAmpersandToken */:
-                    return 2;
-                case 47 /* BarToken */:
-                    return 3;
-                case 48 /* CaretToken */:
-                    return 4;
-                case 46 /* AmpersandToken */:
-                    return 5;
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                    return 6;
-                case 25 /* LessThanToken */:
-                case 27 /* GreaterThanToken */:
-                case 28 /* LessThanEqualsToken */:
-                case 29 /* GreaterThanEqualsToken */:
-                case 91 /* InstanceOfKeyword */:
-                case 90 /* InKeyword */:
-                case 116 /* AsKeyword */:
-                    return 7;
-                case 43 /* LessThanLessThanToken */:
-                case 44 /* GreaterThanGreaterThanToken */:
-                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                    return 8;
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                    return 9;
-                case 37 /* AsteriskToken */:
-                case 39 /* SlashToken */:
-                case 40 /* PercentToken */:
-                    return 10;
-                case 38 /* AsteriskAsteriskToken */:
-                    return 11;
-            }
-            // -1 is lower than all other precedences.  Returning it will cause binary expression
-            // parsing to stop.
-            return -1;
-        }
-        function makeBinaryExpression(left, operatorToken, right) {
-            var node = createNode(187 /* BinaryExpression */, left.pos);
-            node.left = left;
-            node.operatorToken = operatorToken;
-            node.right = right;
-            return finishNode(node);
-        }
-        function makeAsExpression(left, right) {
-            var node = createNode(195 /* AsExpression */, left.pos);
-            node.expression = left;
-            node.type = right;
-            return finishNode(node);
-        }
-        function parsePrefixUnaryExpression() {
-            var node = createNode(185 /* PrefixUnaryExpression */);
-            node.operator = token;
-            nextToken();
-            node.operand = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseDeleteExpression() {
-            var node = createNode(181 /* DeleteExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseTypeOfExpression() {
-            var node = createNode(182 /* TypeOfExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseVoidExpression() {
-            var node = createNode(183 /* VoidExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function isAwaitExpression() {
-            if (token === 119 /* AwaitKeyword */) {
-                if (inAwaitContext()) {
-                    return true;
-                }
-                // here we are using similar heuristics as 'isYieldExpression'
-                return lookAhead(nextTokenIsIdentifierOnSameLine);
-            }
-            return false;
-        }
-        function parseAwaitExpression() {
-            var node = createNode(184 /* AwaitExpression */);
-            nextToken();
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        /**
-         * Parse ES7 unary expression and await expression
-         *
-         * ES7 UnaryExpression:
-         *      1) SimpleUnaryExpression[?yield]
-         *      2) IncrementExpression[?yield] ** UnaryExpression[?yield]
-         */
-        function parseUnaryExpressionOrHigher() {
-            if (isAwaitExpression()) {
-                return parseAwaitExpression();
-            }
-            if (isIncrementExpression()) {
-                var incrementExpression = parseIncrementExpression();
-                return token === 38 /* AsteriskAsteriskToken */ ?
-                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), incrementExpression) :
-                    incrementExpression;
-            }
-            var unaryOperator = token;
-            var simpleUnaryExpression = parseSimpleUnaryExpression();
-            if (token === 38 /* AsteriskAsteriskToken */) {
-                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
-                if (simpleUnaryExpression.kind === 177 /* TypeAssertionExpression */) {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
-                }
-                else {
-                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
-                }
-            }
-            return simpleUnaryExpression;
-        }
-        /**
-         * Parse ES7 simple-unary expression or higher:
-         *
-         * ES7 SimpleUnaryExpression:
-         *      1) IncrementExpression[?yield]
-         *      2) delete UnaryExpression[?yield]
-         *      3) void UnaryExpression[?yield]
-         *      4) typeof UnaryExpression[?yield]
-         *      5) + UnaryExpression[?yield]
-         *      6) - UnaryExpression[?yield]
-         *      7) ~ UnaryExpression[?yield]
-         *      8) ! UnaryExpression[?yield]
-         */
-        function parseSimpleUnaryExpression() {
-            switch (token) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                    return parsePrefixUnaryExpression();
-                case 78 /* DeleteKeyword */:
-                    return parseDeleteExpression();
-                case 101 /* TypeOfKeyword */:
-                    return parseTypeOfExpression();
-                case 103 /* VoidKeyword */:
-                    return parseVoidExpression();
-                case 25 /* LessThanToken */:
-                    // This is modified UnaryExpression grammar in TypeScript
-                    //  UnaryExpression (modified):
-                    //      < type > UnaryExpression
-                    return parseTypeAssertion();
-                default:
-                    return parseIncrementExpression();
-            }
-        }
-        /**
-         * Check if the current token can possibly be an ES7 increment expression.
-         *
-         * ES7 IncrementExpression:
-         *      LeftHandSideExpression[?Yield]
-         *      LeftHandSideExpression[?Yield][no LineTerminator here]++
-         *      LeftHandSideExpression[?Yield][no LineTerminator here]--
-         *      ++LeftHandSideExpression[?Yield]
-         *      --LeftHandSideExpression[?Yield]
-         */
-        function isIncrementExpression() {
-            // This function is called inside parseUnaryExpression to decide
-            // whether to call parseSimpleUnaryExpression or call parseIncrementExpression directly
-            switch (token) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                case 78 /* DeleteKeyword */:
-                case 101 /* TypeOfKeyword */:
-                case 103 /* VoidKeyword */:
-                    return false;
-                case 25 /* LessThanToken */:
-                    // If we are not in JSX context, we are parsing TypeAssertion which is an UnaryExpression
-                    if (sourceFile.languageVariant !== 1 /* JSX */) {
-                        return false;
-                    }
-                // We are in JSX context and the token is part of JSXElement.
-                // Fall through
-                default:
-                    return true;
-            }
-        }
-        /**
-         * Parse ES7 IncrementExpression. IncrementExpression is used instead of ES6's PostFixExpression.
-         *
-         * ES7 IncrementExpression[yield]:
-         *      1) LeftHandSideExpression[?yield]
-         *      2) LeftHandSideExpression[?yield] [[no LineTerminator here]]++
-         *      3) LeftHandSideExpression[?yield] [[no LineTerminator here]]--
-         *      4) ++LeftHandSideExpression[?yield]
-         *      5) --LeftHandSideExpression[?yield]
-         * In TypeScript (2), (3) are parsed as PostfixUnaryExpression. (4), (5) are parsed as PrefixUnaryExpression
-         */
-        function parseIncrementExpression() {
-            if (token === 41 /* PlusPlusToken */ || token === 42 /* MinusMinusToken */) {
-                var node = createNode(185 /* PrefixUnaryExpression */);
-                node.operator = token;
-                nextToken();
-                node.operand = parseLeftHandSideExpressionOrHigher();
-                return finishNode(node);
-            }
-            else if (sourceFile.languageVariant === 1 /* JSX */ && token === 25 /* LessThanToken */ && lookAhead(nextTokenIsIdentifierOrKeyword)) {
-                // JSXElement is part of primaryExpression
-                return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true);
-            }
-            var expression = parseLeftHandSideExpressionOrHigher();
-            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
-            if ((token === 41 /* PlusPlusToken */ || token === 42 /* MinusMinusToken */) && !scanner.hasPrecedingLineBreak()) {
-                var node = createNode(186 /* PostfixUnaryExpression */, expression.pos);
-                node.operand = expression;
-                node.operator = token;
-                nextToken();
-                return finishNode(node);
-            }
-            return expression;
-        }
-        function parseLeftHandSideExpressionOrHigher() {
-            // Original Ecma:
-            // LeftHandSideExpression: See 11.2
-            //      NewExpression
-            //      CallExpression
-            //
-            // Our simplification:
-            //
-            // LeftHandSideExpression: See 11.2
-            //      MemberExpression
-            //      CallExpression
-            //
-            // See comment in parseMemberExpressionOrHigher on how we replaced NewExpression with
-            // MemberExpression to make our lives easier.
-            //
-            // to best understand the below code, it's important to see how CallExpression expands
-            // out into its own productions:
-            //
-            // CallExpression:
-            //      MemberExpression Arguments
-            //      CallExpression Arguments
-            //      CallExpression[Expression]
-            //      CallExpression.IdentifierName
-            //      super   (   ArgumentListopt   )
-            //      super.IdentifierName
-            //
-            // Because of the recursion in these calls, we need to bottom out first.  There are two
-            // bottom out states we can run into.  Either we see 'super' which must start either of
-            // the last two CallExpression productions.  Or we have a MemberExpression which either
-            // completes the LeftHandSideExpression, or starts the beginning of the first four
-            // CallExpression productions.
-            var expression = token === 95 /* SuperKeyword */
-                ? parseSuperExpression()
-                : parseMemberExpressionOrHigher();
-            // Now, we *may* be complete.  However, we might have consumed the start of a
-            // CallExpression.  As such, we need to consume the rest of it here to be complete.
-            return parseCallExpressionRest(expression);
-        }
-        function parseMemberExpressionOrHigher() {
-            // Note: to make our lives simpler, we decompose the the NewExpression productions and
-            // place ObjectCreationExpression and FunctionExpression into PrimaryExpression.
-            // like so:
-            //
-            //   PrimaryExpression : See 11.1
-            //      this
-            //      Identifier
-            //      Literal
-            //      ArrayLiteral
-            //      ObjectLiteral
-            //      (Expression)
-            //      FunctionExpression
-            //      new MemberExpression Arguments?
-            //
-            //   MemberExpression : See 11.2
-            //      PrimaryExpression
-            //      MemberExpression[Expression]
-            //      MemberExpression.IdentifierName
-            //
-            //   CallExpression : See 11.2
-            //      MemberExpression
-            //      CallExpression Arguments
-            //      CallExpression[Expression]
-            //      CallExpression.IdentifierName
-            //
-            // Technically this is ambiguous.  i.e. CallExpression defines:
-            //
-            //   CallExpression:
-            //      CallExpression Arguments
-            //
-            // If you see: "new Foo()"
-            //
-            // Then that could be treated as a single ObjectCreationExpression, or it could be
-            // treated as the invocation of "new Foo".  We disambiguate that in code (to match
-            // the original grammar) by making sure that if we see an ObjectCreationExpression
-            // we always consume arguments if they are there. So we treat "new Foo()" as an
-            // object creation only, and not at all as an invocation)  Another way to think
-            // about this is that for every "new" that we see, we will consume an argument list if
-            // it is there as part of the *associated* object creation node.  Any additional
-            // argument lists we see, will become invocation expressions.
-            //
-            // Because there are no other places in the grammar now that refer to FunctionExpression
-            // or ObjectCreationExpression, it is safe to push down into the PrimaryExpression
-            // production.
-            //
-            // Because CallExpression and MemberExpression are left recursive, we need to bottom out
-            // of the recursion immediately.  So we parse out a primary expression to start with.
-            var expression = parsePrimaryExpression();
-            return parseMemberExpressionRest(expression);
-        }
-        function parseSuperExpression() {
-            var expression = parseTokenNode();
-            if (token === 17 /* OpenParenToken */ || token === 21 /* DotToken */ || token === 19 /* OpenBracketToken */) {
-                return expression;
-            }
-            // If we have seen "super" it must be followed by '(' or '.'.
-            // If it wasn't then just try to parse out a '.' and report an error.
-            var node = createNode(172 /* PropertyAccessExpression */, expression.pos);
-            node.expression = expression;
-            node.dotToken = parseExpectedToken(21 /* DotToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
-            node.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
-            return finishNode(node);
-        }
-        function tagNamesAreEquivalent(lhs, rhs) {
-            if (lhs.kind !== rhs.kind) {
-                return false;
-            }
-            if (lhs.kind === 69 /* Identifier */) {
-                return lhs.text === rhs.text;
-            }
-            return lhs.right.text === rhs.right.text &&
-                tagNamesAreEquivalent(lhs.left, rhs.left);
-        }
-        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
-            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
-            var result;
-            if (opening.kind === 243 /* JsxOpeningElement */) {
-                var node = createNode(241 /* JsxElement */, opening.pos);
-                node.openingElement = opening;
-                node.children = parseJsxChildren(node.openingElement.tagName);
-                node.closingElement = parseJsxClosingElement(inExpressionContext);
-                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
-                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
-                }
-                result = finishNode(node);
-            }
-            else {
-                ts.Debug.assert(opening.kind === 242 /* JsxSelfClosingElement */);
-                // Nothing else to do for self-closing elements
-                result = opening;
-            }
-            // If the user writes the invalid code '<div></div><div></div>' in an expression context (i.e. not wrapped in
-            // an enclosing tag), we'll naively try to parse   ^ this as a 'less than' operator and the remainder of the tag
-            // as garbage, which will cause the formatter to badly mangle the JSX. Perform a speculative parse of a JSX
-            // element if we see a < token so that we can wrap it in a synthetic binary expression so the formatter
-            // does less damage and we can report a better error.
-            // Since JSX elements are invalid < operands anyway, this lookahead parse will only occur in error scenarios
-            // of one sort or another.
-            if (inExpressionContext && token === 25 /* LessThanToken */) {
-                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true); });
-                if (invalidElement) {
-                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
-                    var badNode = createNode(187 /* BinaryExpression */, result.pos);
-                    badNode.end = invalidElement.end;
-                    badNode.left = result;
-                    badNode.right = invalidElement;
-                    badNode.operatorToken = createMissingNode(24 /* CommaToken */, /*reportAtCurrentPosition*/ false, /*diagnosticMessage*/ undefined);
-                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
-                    return badNode;
-                }
-            }
-            return result;
-        }
-        function parseJsxText() {
-            var node = createNode(244 /* JsxText */, scanner.getStartPos());
-            token = scanner.scanJsxToken();
-            return finishNode(node);
-        }
-        function parseJsxChild() {
-            switch (token) {
-                case 244 /* JsxText */:
-                    return parseJsxText();
-                case 15 /* OpenBraceToken */:
-                    return parseJsxExpression(/*inExpressionContext*/ false);
-                case 25 /* LessThanToken */:
-                    return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ false);
-            }
-            ts.Debug.fail("Unknown JSX child kind " + token);
-        }
-        function parseJsxChildren(openingTagName) {
-            var result = [];
-            result.pos = scanner.getStartPos();
-            var saveParsingContext = parsingContext;
-            parsingContext |= 1 << 14 /* JsxChildren */;
-            while (true) {
-                token = scanner.reScanJsxToken();
-                if (token === 26 /* LessThanSlashToken */) {
-                    // Closing tag
-                    break;
-                }
-                else if (token === 1 /* EndOfFileToken */) {
-                    // If we hit EOF, issue the error at the tag that lacks the closing element
-                    // rather than at the end of the file (which is useless)
-                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
-                    break;
-                }
-                result.push(parseJsxChild());
-            }
-            result.end = scanner.getTokenPos();
-            parsingContext = saveParsingContext;
-            return result;
-        }
-        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
-            var fullStart = scanner.getStartPos();
-            parseExpected(25 /* LessThanToken */);
-            var tagName = parseJsxElementName();
-            var attributes = parseList(13 /* JsxAttributes */, parseJsxAttribute);
-            var node;
-            if (token === 27 /* GreaterThanToken */) {
-                // Closing tag, so scan the immediately-following text with the JSX scanning instead
-                // of regular scanning to avoid treating illegal characters (e.g. '#') as immediate
-                // scanning errors
-                node = createNode(243 /* JsxOpeningElement */, fullStart);
-                scanJsxText();
-            }
-            else {
-                parseExpected(39 /* SlashToken */);
-                if (inExpressionContext) {
-                    parseExpected(27 /* GreaterThanToken */);
-                }
-                else {
-                    parseExpected(27 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
-                    scanJsxText();
-                }
-                node = createNode(242 /* JsxSelfClosingElement */, fullStart);
-            }
-            node.tagName = tagName;
-            node.attributes = attributes;
-            return finishNode(node);
-        }
-        function parseJsxElementName() {
-            scanJsxIdentifier();
-            var elementName = parseIdentifierName();
-            while (parseOptional(21 /* DotToken */)) {
-                scanJsxIdentifier();
-                var node = createNode(139 /* QualifiedName */, elementName.pos); // !!!
-                node.left = elementName;
-                node.right = parseIdentifierName();
-                elementName = finishNode(node);
-            }
-            return elementName;
-        }
-        function parseJsxExpression(inExpressionContext) {
-            var node = createNode(248 /* JsxExpression */);
-            parseExpected(15 /* OpenBraceToken */);
-            if (token !== 16 /* CloseBraceToken */) {
-                node.expression = parseAssignmentExpressionOrHigher();
-            }
-            if (inExpressionContext) {
-                parseExpected(16 /* CloseBraceToken */);
-            }
-            else {
-                parseExpected(16 /* CloseBraceToken */, /*message*/ undefined, /*shouldAdvance*/ false);
-                scanJsxText();
-            }
-            return finishNode(node);
-        }
-        function parseJsxAttribute() {
-            if (token === 15 /* OpenBraceToken */) {
-                return parseJsxSpreadAttribute();
-            }
-            scanJsxIdentifier();
-            var node = createNode(246 /* JsxAttribute */);
-            node.name = parseIdentifierName();
-            if (parseOptional(56 /* EqualsToken */)) {
-                switch (token) {
-                    case 9 /* StringLiteral */:
-                        node.initializer = parseLiteralNode();
-                        break;
-                    default:
-                        node.initializer = parseJsxExpression(/*inExpressionContext*/ true);
-                        break;
-                }
-            }
-            return finishNode(node);
-        }
-        function parseJsxSpreadAttribute() {
-            var node = createNode(247 /* JsxSpreadAttribute */);
-            parseExpected(15 /* OpenBraceToken */);
-            parseExpected(22 /* DotDotDotToken */);
-            node.expression = parseExpression();
-            parseExpected(16 /* CloseBraceToken */);
-            return finishNode(node);
-        }
-        function parseJsxClosingElement(inExpressionContext) {
-            var node = createNode(245 /* JsxClosingElement */);
-            parseExpected(26 /* LessThanSlashToken */);
-            node.tagName = parseJsxElementName();
-            if (inExpressionContext) {
-                parseExpected(27 /* GreaterThanToken */);
-            }
-            else {
-                parseExpected(27 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
-                scanJsxText();
-            }
-            return finishNode(node);
-        }
-        function parseTypeAssertion() {
-            var node = createNode(177 /* TypeAssertionExpression */);
-            parseExpected(25 /* LessThanToken */);
-            node.type = parseType();
-            parseExpected(27 /* GreaterThanToken */);
-            node.expression = parseSimpleUnaryExpression();
-            return finishNode(node);
-        }
-        function parseMemberExpressionRest(expression) {
-            while (true) {
-                var dotToken = parseOptionalToken(21 /* DotToken */);
-                if (dotToken) {
-                    var propertyAccess = createNode(172 /* PropertyAccessExpression */, expression.pos);
-                    propertyAccess.expression = expression;
-                    propertyAccess.dotToken = dotToken;
-                    propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
-                    expression = finishNode(propertyAccess);
-                    continue;
-                }
-                if (token === 49 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
-                    nextToken();
-                    var nonNullExpression = createNode(196 /* NonNullExpression */, expression.pos);
-                    nonNullExpression.expression = expression;
-                    expression = finishNode(nonNullExpression);
-                    continue;
-                }
-                // when in the [Decorator] context, we do not parse ElementAccess as it could be part of a ComputedPropertyName
-                if (!inDecoratorContext() && parseOptional(19 /* OpenBracketToken */)) {
-                    var indexedAccess = createNode(173 /* ElementAccessExpression */, expression.pos);
-                    indexedAccess.expression = expression;
-                    // It's not uncommon for a user to write: "new Type[]".
-                    // Check for that common pattern and report a better error message.
-                    if (token !== 20 /* CloseBracketToken */) {
-                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
-                        if (indexedAccess.argumentExpression.kind === 9 /* StringLiteral */ || indexedAccess.argumentExpression.kind === 8 /* NumericLiteral */) {
-                            var literal = indexedAccess.argumentExpression;
-                            literal.text = internIdentifier(literal.text);
-                        }
-                    }
-                    parseExpected(20 /* CloseBracketToken */);
-                    expression = finishNode(indexedAccess);
-                    continue;
-                }
-                if (token === 11 /* NoSubstitutionTemplateLiteral */ || token === 12 /* TemplateHead */) {
-                    var tagExpression = createNode(176 /* TaggedTemplateExpression */, expression.pos);
-                    tagExpression.tag = expression;
-                    tagExpression.template = token === 11 /* NoSubstitutionTemplateLiteral */
-                        ? parseLiteralNode()
-                        : parseTemplateExpression();
-                    expression = finishNode(tagExpression);
-                    continue;
-                }
-                return expression;
-            }
-        }
-        function parseCallExpressionRest(expression) {
-            while (true) {
-                expression = parseMemberExpressionRest(expression);
-                if (token === 25 /* LessThanToken */) {
-                    // See if this is the start of a generic invocation.  If so, consume it and
-                    // keep checking for postfix expressions.  Otherwise, it's just a '<' that's
-                    // part of an arithmetic expression.  Break out so we consume it higher in the
-                    // stack.
-                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
-                    if (!typeArguments) {
-                        return expression;
-                    }
-                    var callExpr = createNode(174 /* CallExpression */, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.typeArguments = typeArguments;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
-                }
-                else if (token === 17 /* OpenParenToken */) {
-                    var callExpr = createNode(174 /* CallExpression */, expression.pos);
-                    callExpr.expression = expression;
-                    callExpr.arguments = parseArgumentList();
-                    expression = finishNode(callExpr);
-                    continue;
-                }
-                return expression;
-            }
-        }
-        function parseArgumentList() {
-            parseExpected(17 /* OpenParenToken */);
-            var result = parseDelimitedList(11 /* ArgumentExpressions */, parseArgumentExpression);
-            parseExpected(18 /* CloseParenToken */);
-            return result;
-        }
-        function parseTypeArgumentsInExpression() {
-            if (!parseOptional(25 /* LessThanToken */)) {
-                return undefined;
-            }
-            var typeArguments = parseDelimitedList(18 /* TypeArguments */, parseType);
-            if (!parseExpected(27 /* GreaterThanToken */)) {
-                // If it doesn't have the closing >  then it's definitely not an type argument list.
-                return undefined;
-            }
-            // If we have a '<', then only parse this as a argument list if the type arguments
-            // are complete and we have an open paren.  if we don't, rewind and return nothing.
-            return typeArguments && canFollowTypeArgumentsInExpression()
-                ? typeArguments
-                : undefined;
-        }
-        function canFollowTypeArgumentsInExpression() {
-            switch (token) {
-                case 17 /* OpenParenToken */: // foo<x>(
-                // this case are the only case where this token can legally follow a type argument
-                // list.  So we definitely want to treat this as a type arg list.
-                case 21 /* DotToken */: // foo<x>.
-                case 18 /* CloseParenToken */: // foo<x>)
-                case 20 /* CloseBracketToken */: // foo<x>]
-                case 54 /* ColonToken */: // foo<x>:
-                case 23 /* SemicolonToken */: // foo<x>;
-                case 53 /* QuestionToken */: // foo<x>?
-                case 30 /* EqualsEqualsToken */: // foo<x> ==
-                case 32 /* EqualsEqualsEqualsToken */: // foo<x> ===
-                case 31 /* ExclamationEqualsToken */: // foo<x> !=
-                case 33 /* ExclamationEqualsEqualsToken */: // foo<x> !==
-                case 51 /* AmpersandAmpersandToken */: // foo<x> &&
-                case 52 /* BarBarToken */: // foo<x> ||
-                case 48 /* CaretToken */: // foo<x> ^
-                case 46 /* AmpersandToken */: // foo<x> &
-                case 47 /* BarToken */: // foo<x> |
-                case 16 /* CloseBraceToken */: // foo<x> }
-                case 1 /* EndOfFileToken */:
-                    // these cases can't legally follow a type arg list.  However, they're not legal
-                    // expressions either.  The user is probably in the middle of a generic type. So
-                    // treat it as such.
-                    return true;
-                case 24 /* CommaToken */: // foo<x>,
-                case 15 /* OpenBraceToken */: // foo<x> {
-                // We don't want to treat these as type arguments.  Otherwise we'll parse this
-                // as an invocation expression.  Instead, we want to parse out the expression
-                // in isolation from the type arguments.
-                default:
-                    // Anything else treat as an expression.
-                    return false;
-            }
-        }
-        function parsePrimaryExpression() {
-            switch (token) {
-                case 8 /* NumericLiteral */:
-                case 9 /* StringLiteral */:
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                    return parseLiteralNode();
-                case 97 /* ThisKeyword */:
-                case 95 /* SuperKeyword */:
-                case 93 /* NullKeyword */:
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                    return parseTokenNode();
-                case 17 /* OpenParenToken */:
-                    return parseParenthesizedExpression();
-                case 19 /* OpenBracketToken */:
-                    return parseArrayLiteralExpression();
-                case 15 /* OpenBraceToken */:
-                    return parseObjectLiteralExpression();
-                case 118 /* AsyncKeyword */:
-                    // Async arrow functions are parsed earlier in parseAssignmentExpressionOrHigher.
-                    // If we encounter `async [no LineTerminator here] function` then this is an async
-                    // function; otherwise, its an identifier.
-                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
-                        break;
-                    }
-                    return parseFunctionExpression();
-                case 73 /* ClassKeyword */:
-                    return parseClassExpression();
-                case 87 /* FunctionKeyword */:
-                    return parseFunctionExpression();
-                case 92 /* NewKeyword */:
-                    return parseNewExpression();
-                case 39 /* SlashToken */:
-                case 61 /* SlashEqualsToken */:
-                    if (reScanSlashToken() === 10 /* RegularExpressionLiteral */) {
-                        return parseLiteralNode();
-                    }
-                    break;
-                case 12 /* TemplateHead */:
-                    return parseTemplateExpression();
-            }
-            return parseIdentifier(ts.Diagnostics.Expression_expected);
-        }
-        function parseParenthesizedExpression() {
-            var node = createNode(178 /* ParenthesizedExpression */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            return finishNode(node);
-        }
-        function parseSpreadElement() {
-            var node = createNode(191 /* SpreadElementExpression */);
-            parseExpected(22 /* DotDotDotToken */);
-            node.expression = parseAssignmentExpressionOrHigher();
-            return finishNode(node);
-        }
-        function parseArgumentOrArrayLiteralElement() {
-            return token === 22 /* DotDotDotToken */ ? parseSpreadElement() :
-                token === 24 /* CommaToken */ ? createNode(193 /* OmittedExpression */) :
-                    parseAssignmentExpressionOrHigher();
-        }
-        function parseArgumentExpression() {
-            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
-        }
-        function parseArrayLiteralExpression() {
-            var node = createNode(170 /* ArrayLiteralExpression */);
-            parseExpected(19 /* OpenBracketToken */);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.elements = parseDelimitedList(15 /* ArrayLiteralMembers */, parseArgumentOrArrayLiteralElement);
-            parseExpected(20 /* CloseBracketToken */);
-            return finishNode(node);
-        }
-        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
-            if (parseContextualModifier(123 /* GetKeyword */)) {
-                return addJSDocComment(parseAccessorDeclaration(149 /* GetAccessor */, fullStart, decorators, modifiers));
-            }
-            else if (parseContextualModifier(131 /* SetKeyword */)) {
-                return parseAccessorDeclaration(150 /* SetAccessor */, fullStart, decorators, modifiers);
-            }
-            return undefined;
-        }
-        function parseObjectLiteralElement() {
-            var fullStart = scanner.getStartPos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
-            }
-            var asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            // Disallowing of optional property assignments happens in the grammar checker.
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (asteriskToken || token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
-            }
-            // check if it is short-hand property assignment or normal property assignment
-            // NOTE: if token is EqualsToken it is interpreted as CoverInitializedName production
-            // CoverInitializedName[Yield] :
-            //     IdentifierReference[?Yield] Initializer[In, ?Yield]
-            // this is necessary because ObjectLiteral productions are also used to cover grammar for ObjectAssignmentPattern
-            var isShorthandPropertyAssignment = tokenIsIdentifier && (token === 24 /* CommaToken */ || token === 16 /* CloseBraceToken */ || token === 56 /* EqualsToken */);
-            if (isShorthandPropertyAssignment) {
-                var shorthandDeclaration = createNode(254 /* ShorthandPropertyAssignment */, fullStart);
-                shorthandDeclaration.name = propertyName;
-                shorthandDeclaration.questionToken = questionToken;
-                var equalsToken = parseOptionalToken(56 /* EqualsToken */);
-                if (equalsToken) {
-                    shorthandDeclaration.equalsToken = equalsToken;
-                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                }
-                return addJSDocComment(finishNode(shorthandDeclaration));
-            }
-            else {
-                var propertyAssignment = createNode(253 /* PropertyAssignment */, fullStart);
-                propertyAssignment.modifiers = modifiers;
-                propertyAssignment.name = propertyName;
-                propertyAssignment.questionToken = questionToken;
-                parseExpected(54 /* ColonToken */);
-                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
-                return addJSDocComment(finishNode(propertyAssignment));
-            }
-        }
-        function parseObjectLiteralExpression() {
-            var node = createNode(171 /* ObjectLiteralExpression */);
-            parseExpected(15 /* OpenBraceToken */);
-            if (scanner.hasPrecedingLineBreak()) {
-                node.multiLine = true;
-            }
-            node.properties = parseDelimitedList(12 /* ObjectLiteralMembers */, parseObjectLiteralElement, /*considerSemicolonAsDelimiter*/ true);
-            parseExpected(16 /* CloseBraceToken */);
-            return finishNode(node);
-        }
-        function parseFunctionExpression() {
-            // GeneratorExpression:
-            //      function* BindingIdentifier [Yield][opt](FormalParameters[Yield]){ GeneratorBody }
-            //
-            // FunctionExpression:
-            //      function BindingIdentifier[opt](FormalParameters){ FunctionBody }
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
-            }
-            var node = createNode(179 /* FunctionExpression */);
-            setModifiers(node, parseModifiers());
-            parseExpected(87 /* FunctionKeyword */);
-            node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = !!(node.flags & 256 /* Async */);
-            node.name =
-                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
-                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
-                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
-                            parseOptionalIdentifier();
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlock(/*allowYield*/ isGenerator, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
-            }
-            return addJSDocComment(finishNode(node));
-        }
-        function parseOptionalIdentifier() {
-            return isIdentifier() ? parseIdentifier() : undefined;
-        }
-        function parseNewExpression() {
-            var node = createNode(175 /* NewExpression */);
-            parseExpected(92 /* NewKeyword */);
-            node.expression = parseMemberExpressionOrHigher();
-            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
-            if (node.typeArguments || token === 17 /* OpenParenToken */) {
-                node.arguments = parseArgumentList();
-            }
-            return finishNode(node);
-        }
-        // STATEMENTS
-        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
-            var node = createNode(199 /* Block */);
-            if (parseExpected(15 /* OpenBraceToken */, diagnosticMessage) || ignoreMissingOpenBrace) {
-                node.statements = parseList(1 /* BlockStatements */, parseStatement);
-                parseExpected(16 /* CloseBraceToken */);
-            }
-            else {
-                node.statements = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
-            var savedYieldContext = inYieldContext();
-            setYieldContext(allowYield);
-            var savedAwaitContext = inAwaitContext();
-            setAwaitContext(allowAwait);
-            // We may be in a [Decorator] context when parsing a function expression or
-            // arrow function. The body of the function is not in [Decorator] context.
-            var saveDecoratorContext = inDecoratorContext();
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ false);
-            }
-            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
-            if (saveDecoratorContext) {
-                setDecoratorContext(/*val*/ true);
-            }
-            setYieldContext(savedYieldContext);
-            setAwaitContext(savedAwaitContext);
-            return block;
-        }
-        function parseEmptyStatement() {
-            var node = createNode(201 /* EmptyStatement */);
-            parseExpected(23 /* SemicolonToken */);
-            return finishNode(node);
-        }
-        function parseIfStatement() {
-            var node = createNode(203 /* IfStatement */);
-            parseExpected(88 /* IfKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            node.thenStatement = parseStatement();
-            node.elseStatement = parseOptional(80 /* ElseKeyword */) ? parseStatement() : undefined;
-            return finishNode(node);
-        }
-        function parseDoStatement() {
-            var node = createNode(204 /* DoStatement */);
-            parseExpected(79 /* DoKeyword */);
-            node.statement = parseStatement();
-            parseExpected(104 /* WhileKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            // From: https://mail.mozilla.org/pipermail/es-discuss/2011-August/016188.html
-            // 157 min --- All allen at wirfs-brock.com CONF --- "do{;}while(false)false" prohibited in
-            // spec but allowed in consensus reality. Approved -- this is the de-facto standard whereby
-            //  do;while(0)x will have a semicolon inserted before x.
-            parseOptional(23 /* SemicolonToken */);
-            return finishNode(node);
-        }
-        function parseWhileStatement() {
-            var node = createNode(205 /* WhileStatement */);
-            parseExpected(104 /* WhileKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            node.statement = parseStatement();
-            return finishNode(node);
-        }
-        function parseForOrForInOrForOfStatement() {
-            var pos = getNodePos();
-            parseExpected(86 /* ForKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            var initializer = undefined;
-            if (token !== 23 /* SemicolonToken */) {
-                if (token === 102 /* VarKeyword */ || token === 108 /* LetKeyword */ || token === 74 /* ConstKeyword */) {
-                    initializer = parseVariableDeclarationList(/*inForStatementInitializer*/ true);
-                }
-                else {
-                    initializer = disallowInAnd(parseExpression);
-                }
-            }
-            var forOrForInOrForOfStatement;
-            if (parseOptional(90 /* InKeyword */)) {
-                var forInStatement = createNode(207 /* ForInStatement */, pos);
-                forInStatement.initializer = initializer;
-                forInStatement.expression = allowInAnd(parseExpression);
-                parseExpected(18 /* CloseParenToken */);
-                forOrForInOrForOfStatement = forInStatement;
-            }
-            else if (parseOptional(138 /* OfKeyword */)) {
-                var forOfStatement = createNode(208 /* ForOfStatement */, pos);
-                forOfStatement.initializer = initializer;
-                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
-                parseExpected(18 /* CloseParenToken */);
-                forOrForInOrForOfStatement = forOfStatement;
-            }
-            else {
-                var forStatement = createNode(206 /* ForStatement */, pos);
-                forStatement.initializer = initializer;
-                parseExpected(23 /* SemicolonToken */);
-                if (token !== 23 /* SemicolonToken */ && token !== 18 /* CloseParenToken */) {
-                    forStatement.condition = allowInAnd(parseExpression);
-                }
-                parseExpected(23 /* SemicolonToken */);
-                if (token !== 18 /* CloseParenToken */) {
-                    forStatement.incrementor = allowInAnd(parseExpression);
-                }
-                parseExpected(18 /* CloseParenToken */);
-                forOrForInOrForOfStatement = forStatement;
-            }
-            forOrForInOrForOfStatement.statement = parseStatement();
-            return finishNode(forOrForInOrForOfStatement);
-        }
-        function parseBreakOrContinueStatement(kind) {
-            var node = createNode(kind);
-            parseExpected(kind === 210 /* BreakStatement */ ? 70 /* BreakKeyword */ : 75 /* ContinueKeyword */);
-            if (!canParseSemicolon()) {
-                node.label = parseIdentifier();
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseReturnStatement() {
-            var node = createNode(211 /* ReturnStatement */);
-            parseExpected(94 /* ReturnKeyword */);
-            if (!canParseSemicolon()) {
-                node.expression = allowInAnd(parseExpression);
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseWithStatement() {
-            var node = createNode(212 /* WithStatement */);
-            parseExpected(105 /* WithKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            node.statement = parseStatement();
-            return finishNode(node);
-        }
-        function parseCaseClause() {
-            var node = createNode(249 /* CaseClause */);
-            parseExpected(71 /* CaseKeyword */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(54 /* ColonToken */);
-            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
-            return finishNode(node);
-        }
-        function parseDefaultClause() {
-            var node = createNode(250 /* DefaultClause */);
-            parseExpected(77 /* DefaultKeyword */);
-            parseExpected(54 /* ColonToken */);
-            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
-            return finishNode(node);
-        }
-        function parseCaseOrDefaultClause() {
-            return token === 71 /* CaseKeyword */ ? parseCaseClause() : parseDefaultClause();
-        }
-        function parseSwitchStatement() {
-            var node = createNode(213 /* SwitchStatement */);
-            parseExpected(96 /* SwitchKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = allowInAnd(parseExpression);
-            parseExpected(18 /* CloseParenToken */);
-            var caseBlock = createNode(227 /* CaseBlock */, scanner.getStartPos());
-            parseExpected(15 /* OpenBraceToken */);
-            caseBlock.clauses = parseList(2 /* SwitchClauses */, parseCaseOrDefaultClause);
-            parseExpected(16 /* CloseBraceToken */);
-            node.caseBlock = finishNode(caseBlock);
-            return finishNode(node);
-        }
-        function parseThrowStatement() {
-            // ThrowStatement[Yield] :
-            //      throw [no LineTerminator here]Expression[In, ?Yield];
-            // Because of automatic semicolon insertion, we need to report error if this
-            // throw could be terminated with a semicolon.  Note: we can't call 'parseExpression'
-            // directly as that might consume an expression on the following line.
-            // We just return 'undefined' in that case.  The actual error will be reported in the
-            // grammar walker.
-            var node = createNode(215 /* ThrowStatement */);
-            parseExpected(98 /* ThrowKeyword */);
-            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
-            parseSemicolon();
-            return finishNode(node);
-        }
-        // TODO: Review for error recovery
-        function parseTryStatement() {
-            var node = createNode(216 /* TryStatement */);
-            parseExpected(100 /* TryKeyword */);
-            node.tryBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
-            node.catchClause = token === 72 /* CatchKeyword */ ? parseCatchClause() : undefined;
-            // If we don't have a catch clause, then we must have a finally clause.  Try to parse
-            // one out no matter what.
-            if (!node.catchClause || token === 85 /* FinallyKeyword */) {
-                parseExpected(85 /* FinallyKeyword */);
-                node.finallyBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
-            }
-            return finishNode(node);
-        }
-        function parseCatchClause() {
-            var result = createNode(252 /* CatchClause */);
-            parseExpected(72 /* CatchKeyword */);
-            if (parseExpected(17 /* OpenParenToken */)) {
-                result.variableDeclaration = parseVariableDeclaration();
-            }
-            parseExpected(18 /* CloseParenToken */);
-            result.block = parseBlock(/*ignoreMissingOpenBrace*/ false);
-            return finishNode(result);
-        }
-        function parseDebuggerStatement() {
-            var node = createNode(217 /* DebuggerStatement */);
-            parseExpected(76 /* DebuggerKeyword */);
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseExpressionOrLabeledStatement() {
-            // Avoiding having to do the lookahead for a labeled statement by just trying to parse
-            // out an expression, seeing if it is identifier and then seeing if it is followed by
-            // a colon.
-            var fullStart = scanner.getStartPos();
-            var expression = allowInAnd(parseExpression);
-            if (expression.kind === 69 /* Identifier */ && parseOptional(54 /* ColonToken */)) {
-                var labeledStatement = createNode(214 /* LabeledStatement */, fullStart);
-                labeledStatement.label = expression;
-                labeledStatement.statement = parseStatement();
-                return addJSDocComment(finishNode(labeledStatement));
-            }
-            else {
-                var expressionStatement = createNode(202 /* ExpressionStatement */, fullStart);
-                expressionStatement.expression = expression;
-                parseSemicolon();
-                return addJSDocComment(finishNode(expressionStatement));
-            }
-        }
-        function nextTokenIsIdentifierOrKeywordOnSameLine() {
-            nextToken();
-            return ts.tokenIsIdentifierOrKeyword(token) && !scanner.hasPrecedingLineBreak();
-        }
-        function nextTokenIsFunctionKeywordOnSameLine() {
-            nextToken();
-            return token === 87 /* FunctionKeyword */ && !scanner.hasPrecedingLineBreak();
-        }
-        function nextTokenIsIdentifierOrKeywordOrNumberOnSameLine() {
-            nextToken();
-            return (ts.tokenIsIdentifierOrKeyword(token) || token === 8 /* NumericLiteral */) && !scanner.hasPrecedingLineBreak();
-        }
-        function isDeclaration() {
-            while (true) {
-                switch (token) {
-                    case 102 /* VarKeyword */:
-                    case 108 /* LetKeyword */:
-                    case 74 /* ConstKeyword */:
-                    case 87 /* FunctionKeyword */:
-                    case 73 /* ClassKeyword */:
-                    case 81 /* EnumKeyword */:
-                        return true;
-                    // 'declare', 'module', 'namespace', 'interface'* and 'type' are all legal JavaScript identifiers;
-                    // however, an identifier cannot be followed by another identifier on the same line. This is what we
-                    // count on to parse out the respective declarations. For instance, we exploit this to say that
-                    //
-                    //    namespace n
-                    //
-                    // can be none other than the beginning of a namespace declaration, but need to respect that JavaScript sees
-                    //
-                    //    namespace
-                    //    n
-                    //
-                    // as the identifier 'namespace' on one line followed by the identifier 'n' on another.
-                    // We need to look one token ahead to see if it permissible to try parsing a declaration.
-                    //
-                    // *Note*: 'interface' is actually a strict mode reserved word. So while
-                    //
-                    //   "use strict"
-                    //   interface
-                    //   I {}
-                    //
-                    // could be legal, it would add complexity for very little gain.
-                    case 107 /* InterfaceKeyword */:
-                    case 134 /* TypeKeyword */:
-                        return nextTokenIsIdentifierOnSameLine();
-                    case 125 /* ModuleKeyword */:
-                    case 126 /* NamespaceKeyword */:
-                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
-                    case 115 /* AbstractKeyword */:
-                    case 118 /* AsyncKeyword */:
-                    case 122 /* DeclareKeyword */:
-                    case 110 /* PrivateKeyword */:
-                    case 111 /* ProtectedKeyword */:
-                    case 112 /* PublicKeyword */:
-                    case 128 /* ReadonlyKeyword */:
-                        nextToken();
-                        // ASI takes effect for this modifier.
-                        if (scanner.hasPrecedingLineBreak()) {
-                            return false;
-                        }
-                        continue;
-                    case 137 /* GlobalKeyword */:
-                        nextToken();
-                        return token === 15 /* OpenBraceToken */ || token === 69 /* Identifier */ || token === 82 /* ExportKeyword */;
-                    case 89 /* ImportKeyword */:
-                        nextToken();
-                        return token === 9 /* StringLiteral */ || token === 37 /* AsteriskToken */ ||
-                            token === 15 /* OpenBraceToken */ || ts.tokenIsIdentifierOrKeyword(token);
-                    case 82 /* ExportKeyword */:
-                        nextToken();
-                        if (token === 56 /* EqualsToken */ || token === 37 /* AsteriskToken */ ||
-                            token === 15 /* OpenBraceToken */ || token === 77 /* DefaultKeyword */ ||
-                            token === 116 /* AsKeyword */) {
-                            return true;
-                        }
-                        continue;
-                    case 113 /* StaticKeyword */:
-                        nextToken();
-                        continue;
-                    default:
-                        return false;
-                }
-            }
-        }
-        function isStartOfDeclaration() {
-            return lookAhead(isDeclaration);
-        }
-        function isStartOfStatement() {
-            switch (token) {
-                case 55 /* AtToken */:
-                case 23 /* SemicolonToken */:
-                case 15 /* OpenBraceToken */:
-                case 102 /* VarKeyword */:
-                case 108 /* LetKeyword */:
-                case 87 /* FunctionKeyword */:
-                case 73 /* ClassKeyword */:
-                case 81 /* EnumKeyword */:
-                case 88 /* IfKeyword */:
-                case 79 /* DoKeyword */:
-                case 104 /* WhileKeyword */:
-                case 86 /* ForKeyword */:
-                case 75 /* ContinueKeyword */:
-                case 70 /* BreakKeyword */:
-                case 94 /* ReturnKeyword */:
-                case 105 /* WithKeyword */:
-                case 96 /* SwitchKeyword */:
-                case 98 /* ThrowKeyword */:
-                case 100 /* TryKeyword */:
-                case 76 /* DebuggerKeyword */:
-                // 'catch' and 'finally' do not actually indicate that the code is part of a statement,
-                // however, we say they are here so that we may gracefully parse them and error later.
-                case 72 /* CatchKeyword */:
-                case 85 /* FinallyKeyword */:
-                    return true;
-                case 74 /* ConstKeyword */:
-                case 82 /* ExportKeyword */:
-                case 89 /* ImportKeyword */:
-                    return isStartOfDeclaration();
-                case 118 /* AsyncKeyword */:
-                case 122 /* DeclareKeyword */:
-                case 107 /* InterfaceKeyword */:
-                case 125 /* ModuleKeyword */:
-                case 126 /* NamespaceKeyword */:
-                case 134 /* TypeKeyword */:
-                case 137 /* GlobalKeyword */:
-                    // When these don't start a declaration, they're an identifier in an expression statement
-                    return true;
-                case 112 /* PublicKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 113 /* StaticKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                    // When these don't start a declaration, they may be the start of a class member if an identifier
-                    // immediately follows. Otherwise they're an identifier in an expression statement.
-                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
-                default:
-                    return isStartOfExpression();
-            }
-        }
-        function nextTokenIsIdentifierOrStartOfDestructuring() {
-            nextToken();
-            return isIdentifier() || token === 15 /* OpenBraceToken */ || token === 19 /* OpenBracketToken */;
-        }
-        function isLetDeclaration() {
-            // In ES6 'let' always starts a lexical declaration if followed by an identifier or {
-            // or [.
-            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
-        }
-        function parseStatement() {
-            switch (token) {
-                case 23 /* SemicolonToken */:
-                    return parseEmptyStatement();
-                case 15 /* OpenBraceToken */:
-                    return parseBlock(/*ignoreMissingOpenBrace*/ false);
-                case 102 /* VarKeyword */:
-                    return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                case 108 /* LetKeyword */:
-                    if (isLetDeclaration()) {
-                        return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                    }
-                    break;
-                case 87 /* FunctionKeyword */:
-                    return parseFunctionDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                case 73 /* ClassKeyword */:
-                    return parseClassDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
-                case 88 /* IfKeyword */:
-                    return parseIfStatement();
-                case 79 /* DoKeyword */:
-                    return parseDoStatement();
-                case 104 /* WhileKeyword */:
-                    return parseWhileStatement();
-                case 86 /* ForKeyword */:
-                    return parseForOrForInOrForOfStatement();
-                case 75 /* ContinueKeyword */:
-                    return parseBreakOrContinueStatement(209 /* ContinueStatement */);
-                case 70 /* BreakKeyword */:
-                    return parseBreakOrContinueStatement(210 /* BreakStatement */);
-                case 94 /* ReturnKeyword */:
-                    return parseReturnStatement();
-                case 105 /* WithKeyword */:
-                    return parseWithStatement();
-                case 96 /* SwitchKeyword */:
-                    return parseSwitchStatement();
-                case 98 /* ThrowKeyword */:
-                    return parseThrowStatement();
-                case 100 /* TryKeyword */:
-                // Include 'catch' and 'finally' for error recovery.
-                case 72 /* CatchKeyword */:
-                case 85 /* FinallyKeyword */:
-                    return parseTryStatement();
-                case 76 /* DebuggerKeyword */:
-                    return parseDebuggerStatement();
-                case 55 /* AtToken */:
-                    return parseDeclaration();
-                case 118 /* AsyncKeyword */:
-                case 107 /* InterfaceKeyword */:
-                case 134 /* TypeKeyword */:
-                case 125 /* ModuleKeyword */:
-                case 126 /* NamespaceKeyword */:
-                case 122 /* DeclareKeyword */:
-                case 74 /* ConstKeyword */:
-                case 81 /* EnumKeyword */:
-                case 82 /* ExportKeyword */:
-                case 89 /* ImportKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 112 /* PublicKeyword */:
-                case 115 /* AbstractKeyword */:
-                case 113 /* StaticKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                case 137 /* GlobalKeyword */:
-                    if (isStartOfDeclaration()) {
-                        return parseDeclaration();
-                    }
-                    break;
-            }
-            return parseExpressionOrLabeledStatement();
-        }
-        function parseDeclaration() {
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers();
-            switch (token) {
-                case 102 /* VarKeyword */:
-                case 108 /* LetKeyword */:
-                case 74 /* ConstKeyword */:
-                    return parseVariableStatement(fullStart, decorators, modifiers);
-                case 87 /* FunctionKeyword */:
-                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
-                case 73 /* ClassKeyword */:
-                    return parseClassDeclaration(fullStart, decorators, modifiers);
-                case 107 /* InterfaceKeyword */:
-                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
-                case 134 /* TypeKeyword */:
-                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
-                case 81 /* EnumKeyword */:
-                    return parseEnumDeclaration(fullStart, decorators, modifiers);
-                case 137 /* GlobalKeyword */:
-                case 125 /* ModuleKeyword */:
-                case 126 /* NamespaceKeyword */:
-                    return parseModuleDeclaration(fullStart, decorators, modifiers);
-                case 89 /* ImportKeyword */:
-                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
-                case 82 /* ExportKeyword */:
-                    nextToken();
-                    switch (token) {
-                        case 77 /* DefaultKeyword */:
-                        case 56 /* EqualsToken */:
-                            return parseExportAssignment(fullStart, decorators, modifiers);
-                        case 116 /* AsKeyword */:
-                            return parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers);
-                        default:
-                            return parseExportDeclaration(fullStart, decorators, modifiers);
-                    }
-                default:
-                    if (decorators || modifiers) {
-                        // We reached this point because we encountered decorators and/or modifiers and assumed a declaration
-                        // would follow. For recovery and error reporting purposes, return an incomplete declaration.
-                        var node = createMissingNode(239 /* MissingDeclaration */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
-                        node.pos = fullStart;
-                        node.decorators = decorators;
-                        setModifiers(node, modifiers);
-                        return finishNode(node);
-                    }
-            }
-        }
-        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
-            nextToken();
-            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token === 9 /* StringLiteral */);
-        }
-        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
-            if (token !== 15 /* OpenBraceToken */ && canParseSemicolon()) {
-                parseSemicolon();
-                return;
-            }
-            return parseFunctionBlock(isGenerator, isAsync, /*ignoreMissingOpenBrace*/ false, diagnosticMessage);
-        }
-        // DECLARATIONS
-        function parseArrayBindingElement() {
-            if (token === 24 /* CommaToken */) {
-                return createNode(193 /* OmittedExpression */);
-            }
-            var node = createNode(169 /* BindingElement */);
-            node.dotDotDotToken = parseOptionalToken(22 /* DotDotDotToken */);
-            node.name = parseIdentifierOrPattern();
-            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
-            return finishNode(node);
-        }
-        function parseObjectBindingElement() {
-            var node = createNode(169 /* BindingElement */);
-            var tokenIsIdentifier = isIdentifier();
-            var propertyName = parsePropertyName();
-            if (tokenIsIdentifier && token !== 54 /* ColonToken */) {
-                node.name = propertyName;
-            }
-            else {
-                parseExpected(54 /* ColonToken */);
-                node.propertyName = propertyName;
-                node.name = parseIdentifierOrPattern();
-            }
-            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
-            return finishNode(node);
-        }
-        function parseObjectBindingPattern() {
-            var node = createNode(167 /* ObjectBindingPattern */);
-            parseExpected(15 /* OpenBraceToken */);
-            node.elements = parseDelimitedList(9 /* ObjectBindingElements */, parseObjectBindingElement);
-            parseExpected(16 /* CloseBraceToken */);
-            return finishNode(node);
-        }
-        function parseArrayBindingPattern() {
-            var node = createNode(168 /* ArrayBindingPattern */);
-            parseExpected(19 /* OpenBracketToken */);
-            node.elements = parseDelimitedList(10 /* ArrayBindingElements */, parseArrayBindingElement);
-            parseExpected(20 /* CloseBracketToken */);
-            return finishNode(node);
-        }
-        function isIdentifierOrPattern() {
-            return token === 15 /* OpenBraceToken */ || token === 19 /* OpenBracketToken */ || isIdentifier();
-        }
-        function parseIdentifierOrPattern() {
-            if (token === 19 /* OpenBracketToken */) {
-                return parseArrayBindingPattern();
-            }
-            if (token === 15 /* OpenBraceToken */) {
-                return parseObjectBindingPattern();
-            }
-            return parseIdentifier();
-        }
-        function parseVariableDeclaration() {
-            var node = createNode(218 /* VariableDeclaration */);
-            node.name = parseIdentifierOrPattern();
-            node.type = parseTypeAnnotation();
-            if (!isInOrOfKeyword(token)) {
-                node.initializer = parseInitializer(/*inParameter*/ false);
-            }
-            return finishNode(node);
-        }
-        function parseVariableDeclarationList(inForStatementInitializer) {
-            var node = createNode(219 /* VariableDeclarationList */);
-            switch (token) {
-                case 102 /* VarKeyword */:
-                    break;
-                case 108 /* LetKeyword */:
-                    node.flags |= 1024 /* Let */;
-                    break;
-                case 74 /* ConstKeyword */:
-                    node.flags |= 2048 /* Const */;
-                    break;
-                default:
-                    ts.Debug.fail();
-            }
-            nextToken();
-            // The user may have written the following:
-            //
-            //    for (let of X) { }
-            //
-            // In this case, we want to parse an empty declaration list, and then parse 'of'
-            // as a keyword. The reason this is not automatic is that 'of' is a valid identifier.
-            // So we need to look ahead to determine if 'of' should be treated as a keyword in
-            // this context.
-            // The checker will then give an error that there is an empty declaration list.
-            if (token === 138 /* OfKeyword */ && lookAhead(canFollowContextualOfKeyword)) {
-                node.declarations = createMissingList();
-            }
-            else {
-                var savedDisallowIn = inDisallowInContext();
-                setDisallowInContext(inForStatementInitializer);
-                node.declarations = parseDelimitedList(8 /* VariableDeclarations */, parseVariableDeclaration);
-                setDisallowInContext(savedDisallowIn);
-            }
-            return finishNode(node);
-        }
-        function canFollowContextualOfKeyword() {
-            return nextTokenIsIdentifier() && nextToken() === 18 /* CloseParenToken */;
-        }
-        function parseVariableStatement(fullStart, decorators, modifiers) {
-            var node = createNode(200 /* VariableStatement */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.declarationList = parseVariableDeclarationList(/*inForStatementInitializer*/ false);
-            parseSemicolon();
-            return addJSDocComment(finishNode(node));
-        }
-        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(220 /* FunctionDeclaration */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(87 /* FunctionKeyword */);
-            node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            node.name = node.flags & 512 /* Default */ ? parseOptionalIdentifier() : parseIdentifier();
-            var isGenerator = !!node.asteriskToken;
-            var isAsync = !!(node.flags & 256 /* Async */);
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
-        }
-        function parseConstructorDeclaration(pos, decorators, modifiers) {
-            var node = createNode(148 /* Constructor */, pos);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(121 /* ConstructorKeyword */);
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false, ts.Diagnostics.or_expected);
-            return addJSDocComment(finishNode(node));
-        }
-        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
-            var method = createNode(147 /* MethodDeclaration */, fullStart);
-            method.decorators = decorators;
-            setModifiers(method, modifiers);
-            method.asteriskToken = asteriskToken;
-            method.name = name;
-            method.questionToken = questionToken;
-            var isGenerator = !!asteriskToken;
-            var isAsync = !!(method.flags & 256 /* Async */);
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, method);
-            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
-            return addJSDocComment(finishNode(method));
-        }
-        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
-            var property = createNode(145 /* PropertyDeclaration */, fullStart);
-            property.decorators = decorators;
-            setModifiers(property, modifiers);
-            property.name = name;
-            property.questionToken = questionToken;
-            property.type = parseTypeAnnotation();
-            // For instance properties specifically, since they are evaluated inside the constructor,
-            // we do *not * want to parse yield expressions, so we specifically turn the yield context
-            // off. The grammar would look something like this:
-            //
-            //    MemberVariableDeclaration[Yield]:
-            //        AccessibilityModifier_opt   PropertyName   TypeAnnotation_opt   Initializer_opt[In];
-            //        AccessibilityModifier_opt  static_opt  PropertyName   TypeAnnotation_opt   Initializer_opt[In, ?Yield];
-            //
-            // The checker may still error in the static case to explicitly disallow the yield expression.
-            property.initializer = modifiers && modifiers.flags & 32 /* Static */
-                ? allowInAnd(parseNonParameterInitializer)
-                : doOutsideOfContext(8388608 /* YieldContext */ | 4194304 /* DisallowInContext */, parseNonParameterInitializer);
-            parseSemicolon();
-            return finishNode(property);
-        }
-        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
-            var asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
-            var name = parsePropertyName();
-            // Note: this is not legal as per the grammar.  But we allow it in the parser and
-            // report an error in the grammar checker.
-            var questionToken = parseOptionalToken(53 /* QuestionToken */);
-            if (asteriskToken || token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
-                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
-            }
-            else {
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
-            }
-        }
-        function parseNonParameterInitializer() {
-            return parseInitializer(/*inParameter*/ false);
-        }
-        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.name = parsePropertyName();
-            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
-            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false);
-            return finishNode(node);
-        }
-        function isClassMemberModifier(idToken) {
-            switch (idToken) {
-                case 112 /* PublicKeyword */:
-                case 110 /* PrivateKeyword */:
-                case 111 /* ProtectedKeyword */:
-                case 113 /* StaticKeyword */:
-                case 128 /* ReadonlyKeyword */:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-        function isClassMemberStart() {
-            var idToken;
-            if (token === 55 /* AtToken */) {
-                return true;
-            }
-            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier.
-            while (ts.isModifierKind(token)) {
-                idToken = token;
-                // If the idToken is a class modifier (protected, private, public, and static), it is
-                // certain that we are starting to parse class member. This allows better error recovery
-                // Example:
-                //      public foo() ...     // true
-                //      public @dec blah ... // true; we will then report an error later
-                //      export public ...    // true; we will then report an error later
-                if (isClassMemberModifier(idToken)) {
-                    return true;
-                }
-                nextToken();
-            }
-            if (token === 37 /* AsteriskToken */) {
-                return true;
-            }
-            // Try to get the first property-like token following all modifiers.
-            // This can either be an identifier or the 'get' or 'set' keywords.
-            if (isLiteralPropertyName()) {
-                idToken = token;
-                nextToken();
-            }
-            // Index signatures and computed properties are class members; we can parse.
-            if (token === 19 /* OpenBracketToken */) {
-                return true;
-            }
-            // If we were able to get any potential identifier...
-            if (idToken !== undefined) {
-                // If we have a non-keyword identifier, or if we have an accessor, then it's safe to parse.
-                if (!ts.isKeyword(idToken) || idToken === 131 /* SetKeyword */ || idToken === 123 /* GetKeyword */) {
-                    return true;
-                }
-                // If it *is* a keyword, but not an accessor, check a little farther along
-                // to see if it should actually be parsed as a class member.
-                switch (token) {
-                    case 17 /* OpenParenToken */: // Method declaration
-                    case 25 /* LessThanToken */: // Generic Method declaration
-                    case 54 /* ColonToken */: // Type Annotation for declaration
-                    case 56 /* EqualsToken */: // Initializer for declaration
-                    case 53 /* QuestionToken */:
-                        return true;
-                    default:
-                        // Covers
-                        //  - Semicolons     (declaration termination)
-                        //  - Closing braces (end-of-class, must be declaration)
-                        //  - End-of-files   (not valid, but permitted so that it gets caught later on)
-                        //  - Line-breaks    (enabling *automatic semicolon insertion*)
-                        return canParseSemicolon();
-                }
-            }
-            return false;
-        }
-        function parseDecorators() {
-            var decorators;
-            while (true) {
-                var decoratorStart = getNodePos();
-                if (!parseOptional(55 /* AtToken */)) {
-                    break;
-                }
-                if (!decorators) {
-                    decorators = [];
-                    decorators.pos = decoratorStart;
-                }
-                var decorator = createNode(143 /* Decorator */, decoratorStart);
-                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
-                decorators.push(finishNode(decorator));
-            }
-            if (decorators) {
-                decorators.end = getNodeEnd();
-            }
-            return decorators;
-        }
-        /*
-         * There are situations in which a modifier like 'const' will appear unexpectedly, such as on a class member.
-         * In those situations, if we are entirely sure that 'const' is not valid on its own (such as when ASI takes effect
-         * and turns it into a standalone declaration), then it is better to parse it and report an error later.
-         *
-         * In such situations, 'permitInvalidConstAsModifier' should be set to true.
-         */
-        function parseModifiers(permitInvalidConstAsModifier) {
-            var flags = 0;
-            var modifiers;
-            while (true) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token;
-                if (token === 74 /* ConstKeyword */ && permitInvalidConstAsModifier) {
-                    // We need to ensure that any subsequent modifiers appear on the same line
-                    // so that when 'const' is a standalone declaration, we don't issue an error.
-                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
-                        break;
-                    }
-                }
-                else {
-                    if (!parseAnyContextualModifier()) {
-                        break;
-                    }
-                }
-                if (!modifiers) {
-                    modifiers = [];
-                    modifiers.pos = modifierStart;
-                }
-                flags |= ts.modifierToFlag(modifierKind);
-                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
-            }
-            if (modifiers) {
-                modifiers.flags = flags;
-                modifiers.end = scanner.getStartPos();
-            }
-            return modifiers;
-        }
-        function parseModifiersForArrowFunction() {
-            var flags = 0;
-            var modifiers;
-            if (token === 118 /* AsyncKeyword */) {
-                var modifierStart = scanner.getStartPos();
-                var modifierKind = token;
-                nextToken();
-                modifiers = [];
-                modifiers.pos = modifierStart;
-                flags |= ts.modifierToFlag(modifierKind);
-                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
-                modifiers.flags = flags;
-                modifiers.end = scanner.getStartPos();
-            }
-            return modifiers;
-        }
-        function parseClassElement() {
-            if (token === 23 /* SemicolonToken */) {
-                var result = createNode(198 /* SemicolonClassElement */);
-                nextToken();
-                return finishNode(result);
-            }
-            var fullStart = getNodePos();
-            var decorators = parseDecorators();
-            var modifiers = parseModifiers(/*permitInvalidConstAsModifier*/ true);
-            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
-            if (accessor) {
-                return accessor;
-            }
-            if (token === 121 /* ConstructorKeyword */) {
-                return parseConstructorDeclaration(fullStart, decorators, modifiers);
-            }
-            if (isIndexSignature()) {
-                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
-            }
-            // It is very important that we check this *after* checking indexers because
-            // the [ token can start an index signature or a computed property name
-            if (ts.tokenIsIdentifierOrKeyword(token) ||
-                token === 9 /* StringLiteral */ ||
-                token === 8 /* NumericLiteral */ ||
-                token === 37 /* AsteriskToken */ ||
-                token === 19 /* OpenBracketToken */) {
-                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
-            }
-            if (decorators || modifiers) {
-                // treat this as a property declaration with a missing name.
-                var name_7 = createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
-                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_7, /*questionToken*/ undefined);
-            }
-            // 'isClassMemberStart' should have hinted not to attempt parsing.
-            ts.Debug.fail("Should not have attempted to parse class member declaration.");
-        }
-        function parseClassExpression() {
-            return parseClassDeclarationOrExpression(
-            /*fullStart*/ scanner.getStartPos(), 
-            /*decorators*/ undefined, 
-            /*modifiers*/ undefined, 192 /* ClassExpression */);
-        }
-        function parseClassDeclaration(fullStart, decorators, modifiers) {
-            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 221 /* ClassDeclaration */);
-        }
-        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
-            var node = createNode(kind, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(73 /* ClassKeyword */);
-            node.name = parseNameOfClassDeclarationOrExpression();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ true);
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                // ClassTail[Yield,Await] : (Modified) See 14.5
-                //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
-                node.members = parseClassMembers();
-                parseExpected(16 /* CloseBraceToken */);
-            }
-            else {
-                node.members = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseNameOfClassDeclarationOrExpression() {
-            // implements is a future reserved word so
-            // 'class implements' might mean either
-            // - class expression with omitted name, 'implements' starts heritage clause
-            // - class with name 'implements'
-            // 'isImplementsClause' helps to disambiguate between these two cases
-            return isIdentifier() && !isImplementsClause()
-                ? parseIdentifier()
-                : undefined;
-        }
-        function isImplementsClause() {
-            return token === 106 /* ImplementsKeyword */ && lookAhead(nextTokenIsIdentifierOrKeyword);
-        }
-        function parseHeritageClauses(isClassHeritageClause) {
-            // ClassTail[Yield,Await] : (Modified) See 14.5
-            //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
-            if (isHeritageClause()) {
-                return parseList(20 /* HeritageClauses */, parseHeritageClause);
-            }
-            return undefined;
-        }
-        function parseHeritageClause() {
-            if (token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */) {
-                var node = createNode(251 /* HeritageClause */);
-                node.token = token;
-                nextToken();
-                node.types = parseDelimitedList(7 /* HeritageClauseElement */, parseExpressionWithTypeArguments);
-                return finishNode(node);
-            }
-            return undefined;
-        }
-        function parseExpressionWithTypeArguments() {
-            var node = createNode(194 /* ExpressionWithTypeArguments */);
-            node.expression = parseLeftHandSideExpressionOrHigher();
-            if (token === 25 /* LessThanToken */) {
-                node.typeArguments = parseBracketedList(18 /* TypeArguments */, parseType, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
-            }
-            return finishNode(node);
-        }
-        function isHeritageClause() {
-            return token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */;
-        }
-        function parseClassMembers() {
-            return parseList(5 /* ClassMembers */, parseClassElement);
-        }
-        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(222 /* InterfaceDeclaration */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(107 /* InterfaceKeyword */);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ false);
-            node.members = parseObjectTypeMembers();
-            return finishNode(node);
-        }
-        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(223 /* TypeAliasDeclaration */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(134 /* TypeKeyword */);
-            node.name = parseIdentifier();
-            node.typeParameters = parseTypeParameters();
-            parseExpected(56 /* EqualsToken */);
-            node.type = parseType();
-            parseSemicolon();
-            return finishNode(node);
-        }
-        // In an ambient declaration, the grammar only allows integer literals as initializers.
-        // In a non-ambient declaration, the grammar allows uninitialized members only in a
-        // ConstantEnumMemberSection, which starts at the beginning of an enum declaration
-        // or any time an integer literal initializer is encountered.
-        function parseEnumMember() {
-            var node = createNode(255 /* EnumMember */, scanner.getStartPos());
-            node.name = parsePropertyName();
-            node.initializer = allowInAnd(parseNonParameterInitializer);
-            return finishNode(node);
-        }
-        function parseEnumDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(224 /* EnumDeclaration */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            parseExpected(81 /* EnumKeyword */);
-            node.name = parseIdentifier();
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                node.members = parseDelimitedList(6 /* EnumMembers */, parseEnumMember);
-                parseExpected(16 /* CloseBraceToken */);
-            }
-            else {
-                node.members = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseModuleBlock() {
-            var node = createNode(226 /* ModuleBlock */, scanner.getStartPos());
-            if (parseExpected(15 /* OpenBraceToken */)) {
-                node.statements = parseList(1 /* BlockStatements */, parseStatement);
-                parseExpected(16 /* CloseBraceToken */);
-            }
-            else {
-                node.statements = createMissingList();
-            }
-            return finishNode(node);
-        }
-        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
-            var node = createNode(225 /* ModuleDeclaration */, fullStart);
-            // If we are parsing a dotted namespace name, we want to
-            // propagate the 'Namespace' flag across the names if set.
-            var namespaceFlag = flags & 4096 /* Namespace */;
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            node.flags |= flags;
-            node.name = parseIdentifier();
-            node.body = parseOptional(21 /* DotToken */)
-                ? parseModuleOrNamespaceDeclaration(getNodePos(), /*decorators*/ undefined, /*modifiers*/ undefined, 1 /* Export */ | namespaceFlag)
-                : parseModuleBlock();
-            return finishNode(node);
-        }
-        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(225 /* ModuleDeclaration */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (token === 137 /* GlobalKeyword */) {
-                // parse 'global' as name of global scope augmentation
-                node.name = parseIdentifier();
-                node.flags |= 131072 /* GlobalAugmentation */;
-            }
-            else {
-                node.name = parseLiteralNode(/*internName*/ true);
-            }
-            node.body = parseModuleBlock();
-            return finishNode(node);
-        }
-        function parseModuleDeclaration(fullStart, decorators, modifiers) {
-            var flags = modifiers ? modifiers.flags : 0;
-            if (token === 137 /* GlobalKeyword */) {
-                // global augmentation
-                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
-            }
-            else if (parseOptional(126 /* NamespaceKeyword */)) {
-                flags |= 4096 /* Namespace */;
-            }
-            else {
-                parseExpected(125 /* ModuleKeyword */);
-                if (token === 9 /* StringLiteral */) {
-                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
-                }
-            }
-            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
-        }
-        function isExternalModuleReference() {
-            return token === 129 /* RequireKeyword */ &&
-                lookAhead(nextTokenIsOpenParen);
-        }
-        function nextTokenIsOpenParen() {
-            return nextToken() === 17 /* OpenParenToken */;
-        }
-        function nextTokenIsSlash() {
-            return nextToken() === 39 /* SlashToken */;
-        }
-        function parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers) {
-            var exportDeclaration = createNode(228 /* NamespaceExportDeclaration */, fullStart);
-            exportDeclaration.decorators = decorators;
-            exportDeclaration.modifiers = modifiers;
-            parseExpected(116 /* AsKeyword */);
-            parseExpected(126 /* NamespaceKeyword */);
-            exportDeclaration.name = parseIdentifier();
-            parseExpected(23 /* SemicolonToken */);
-            return finishNode(exportDeclaration);
-        }
-        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
-            parseExpected(89 /* ImportKeyword */);
-            var afterImportPos = scanner.getStartPos();
-            var identifier;
-            if (isIdentifier()) {
-                identifier = parseIdentifier();
-                if (token !== 24 /* CommaToken */ && token !== 136 /* FromKeyword */) {
-                    // ImportEquals declaration of type:
-                    // import x = require("mod"); or
-                    // import x = M.x;
-                    var importEqualsDeclaration = createNode(229 /* ImportEqualsDeclaration */, fullStart);
-                    importEqualsDeclaration.decorators = decorators;
-                    setModifiers(importEqualsDeclaration, modifiers);
-                    importEqualsDeclaration.name = identifier;
-                    parseExpected(56 /* EqualsToken */);
-                    importEqualsDeclaration.moduleReference = parseModuleReference();
-                    parseSemicolon();
-                    return finishNode(importEqualsDeclaration);
-                }
-            }
-            // Import statement
-            var importDeclaration = createNode(230 /* ImportDeclaration */, fullStart);
-            importDeclaration.decorators = decorators;
-            setModifiers(importDeclaration, modifiers);
-            // ImportDeclaration:
-            //  import ImportClause from ModuleSpecifier ;
-            //  import ModuleSpecifier;
-            if (identifier ||
-                token === 37 /* AsteriskToken */ ||
-                token === 15 /* OpenBraceToken */) {
-                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
-                parseExpected(136 /* FromKeyword */);
-            }
-            importDeclaration.moduleSpecifier = parseModuleSpecifier();
-            parseSemicolon();
-            return finishNode(importDeclaration);
-        }
-        function parseImportClause(identifier, fullStart) {
-            // ImportClause:
-            //  ImportedDefaultBinding
-            //  NameSpaceImport
-            //  NamedImports
-            //  ImportedDefaultBinding, NameSpaceImport
-            //  ImportedDefaultBinding, NamedImports
-            var importClause = createNode(231 /* ImportClause */, fullStart);
-            if (identifier) {
-                // ImportedDefaultBinding:
-                //  ImportedBinding
-                importClause.name = identifier;
-            }
-            // If there was no default import or if there is comma token after default import
-            // parse namespace or named imports
-            if (!importClause.name ||
-                parseOptional(24 /* CommaToken */)) {
-                importClause.namedBindings = token === 37 /* AsteriskToken */ ? parseNamespaceImport() : parseNamedImportsOrExports(233 /* NamedImports */);
-            }
-            return finishNode(importClause);
-        }
-        function parseModuleReference() {
-            return isExternalModuleReference()
-                ? parseExternalModuleReference()
-                : parseEntityName(/*allowReservedWords*/ false);
-        }
-        function parseExternalModuleReference() {
-            var node = createNode(240 /* ExternalModuleReference */);
-            parseExpected(129 /* RequireKeyword */);
-            parseExpected(17 /* OpenParenToken */);
-            node.expression = parseModuleSpecifier();
-            parseExpected(18 /* CloseParenToken */);
-            return finishNode(node);
-        }
-        function parseModuleSpecifier() {
-            if (token === 9 /* StringLiteral */) {
-                var result = parseLiteralNode();
-                internIdentifier(result.text);
-                return result;
-            }
-            else {
-                // We allow arbitrary expressions here, even though the grammar only allows string
-                // literals.  We check to ensure that it is only a string literal later in the grammar
-                // check pass.
-                return parseExpression();
-            }
-        }
-        function parseNamespaceImport() {
-            // NameSpaceImport:
-            //  * as ImportedBinding
-            var namespaceImport = createNode(232 /* NamespaceImport */);
-            parseExpected(37 /* AsteriskToken */);
-            parseExpected(116 /* AsKeyword */);
-            namespaceImport.name = parseIdentifier();
-            return finishNode(namespaceImport);
-        }
-        function parseNamedImportsOrExports(kind) {
-            var node = createNode(kind);
-            // NamedImports:
-            //  { }
-            //  { ImportsList }
-            //  { ImportsList, }
-            // ImportsList:
-            //  ImportSpecifier
-            //  ImportsList, ImportSpecifier
-            node.elements = parseBracketedList(21 /* ImportOrExportSpecifiers */, kind === 233 /* NamedImports */ ? parseImportSpecifier : parseExportSpecifier, 15 /* OpenBraceToken */, 16 /* CloseBraceToken */);
-            return finishNode(node);
-        }
-        function parseExportSpecifier() {
-            return parseImportOrExportSpecifier(238 /* ExportSpecifier */);
-        }
-        function parseImportSpecifier() {
-            return parseImportOrExportSpecifier(234 /* ImportSpecifier */);
-        }
-        function parseImportOrExportSpecifier(kind) {
-            var node = createNode(kind);
-            // ImportSpecifier:
-            //   BindingIdentifier
-            //   IdentifierName as BindingIdentifier
-            // ExportSpecifier:
-            //   IdentifierName
-            //   IdentifierName as IdentifierName
-            var checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
-            var checkIdentifierStart = scanner.getTokenPos();
-            var checkIdentifierEnd = scanner.getTextPos();
-            var identifierName = parseIdentifierName();
-            if (token === 116 /* AsKeyword */) {
-                node.propertyName = identifierName;
-                parseExpected(116 /* AsKeyword */);
-                checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
-                checkIdentifierStart = scanner.getTokenPos();
-                checkIdentifierEnd = scanner.getTextPos();
-                node.name = parseIdentifierName();
-            }
-            else {
-                node.name = identifierName;
-            }
-            if (kind === 234 /* ImportSpecifier */ && checkIdentifierIsKeyword) {
-                // Report error identifier expected
-                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
-            }
-            return finishNode(node);
-        }
-        function parseExportDeclaration(fullStart, decorators, modifiers) {
-            var node = createNode(236 /* ExportDeclaration */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (parseOptional(37 /* AsteriskToken */)) {
-                parseExpected(136 /* FromKeyword */);
-                node.moduleSpecifier = parseModuleSpecifier();
-            }
-            else {
-                node.exportClause = parseNamedImportsOrExports(237 /* NamedExports */);
-                // It is not uncommon to accidentally omit the 'from' keyword. Additionally, in editing scenarios,
-                // the 'from' keyword can be parsed as a named export when the export clause is unterminated (i.e. `export { from "moduleName";`)
-                // If we don't have a 'from' keyword, see if we have a string literal such that ASI won't take effect.
-                if (token === 136 /* FromKeyword */ || (token === 9 /* StringLiteral */ && !scanner.hasPrecedingLineBreak())) {
-                    parseExpected(136 /* FromKeyword */);
-                    node.moduleSpecifier = parseModuleSpecifier();
-                }
-            }
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function parseExportAssignment(fullStart, decorators, modifiers) {
-            var node = createNode(235 /* ExportAssignment */, fullStart);
-            node.decorators = decorators;
-            setModifiers(node, modifiers);
-            if (parseOptional(56 /* EqualsToken */)) {
-                node.isExportEquals = true;
-            }
-            else {
-                parseExpected(77 /* DefaultKeyword */);
-            }
-            node.expression = parseAssignmentExpressionOrHigher();
-            parseSemicolon();
-            return finishNode(node);
-        }
-        function processReferenceComments(sourceFile) {
-            var triviaScanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ false, 0 /* Standard */, sourceText);
-            var referencedFiles = [];
-            var typeReferenceDirectives = [];
-            var amdDependencies = [];
-            var amdModuleName;
-            // Keep scanning all the leading trivia in the file until we get to something that
-            // isn't trivia.  Any single line comment will be analyzed to see if it is a
-            // reference comment.
-            while (true) {
-                var kind = triviaScanner.scan();
-                if (kind !== 2 /* SingleLineCommentTrivia */) {
-                    if (ts.isTrivia(kind)) {
-                        continue;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                var range = { pos: triviaScanner.getTokenPos(), end: triviaScanner.getTextPos(), kind: triviaScanner.getToken() };
-                var comment = sourceText.substring(range.pos, range.end);
-                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
-                if (referencePathMatchResult) {
-                    var fileReference = referencePathMatchResult.fileReference;
-                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
-                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
-                    if (fileReference) {
-                        if (referencePathMatchResult.isTypeReferenceDirective) {
-                            typeReferenceDirectives.push(fileReference);
-                        }
-                        else {
-                            referencedFiles.push(fileReference);
-                        }
-                    }
-                    if (diagnosticMessage) {
-                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
-                    }
-                }
-                else {
-                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
-                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
-                    if (amdModuleNameMatchResult) {
-                        if (amdModuleName) {
-                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
-                        }
-                        amdModuleName = amdModuleNameMatchResult[2];
-                    }
-                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
-                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
-                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
-                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
-                    if (amdDependencyMatchResult) {
-                        var pathMatchResult = pathRegex.exec(comment);
-                        var nameMatchResult = nameRegex.exec(comment);
-                        if (pathMatchResult) {
-                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
-                            amdDependencies.push(amdDependency);
-                        }
-                    }
-                }
-            }
-            sourceFile.referencedFiles = referencedFiles;
-            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
-            sourceFile.amdDependencies = amdDependencies;
-            sourceFile.moduleName = amdModuleName;
-        }
-        function setExternalModuleIndicator(sourceFile) {
-            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
-                return node.flags & 1 /* Export */
-                    || node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 240 /* ExternalModuleReference */
-                    || node.kind === 230 /* ImportDeclaration */
-                    || node.kind === 235 /* ExportAssignment */
-                    || node.kind === 236 /* ExportDeclaration */
-                    ? node
-                    : undefined;
-            });
-        }
-        var ParsingContext;
-        (function (ParsingContext) {
-            ParsingContext[ParsingContext["SourceElements"] = 0] = "SourceElements";
-            ParsingContext[ParsingContext["BlockStatements"] = 1] = "BlockStatements";
-            ParsingContext[ParsingContext["SwitchClauses"] = 2] = "SwitchClauses";
-            ParsingContext[ParsingContext["SwitchClauseStatements"] = 3] = "SwitchClauseStatements";
-            ParsingContext[ParsingContext["TypeMembers"] = 4] = "TypeMembers";
-            ParsingContext[ParsingContext["ClassMembers"] = 5] = "ClassMembers";
-            ParsingContext[ParsingContext["EnumMembers"] = 6] = "EnumMembers";
-            ParsingContext[ParsingContext["HeritageClauseElement"] = 7] = "HeritageClauseElement";
-            ParsingContext[ParsingContext["VariableDeclarations"] = 8] = "VariableDeclarations";
-            ParsingContext[ParsingContext["ObjectBindingElements"] = 9] = "ObjectBindingElements";
-            ParsingContext[ParsingContext["ArrayBindingElements"] = 10] = "ArrayBindingElements";
-            ParsingContext[ParsingContext["ArgumentExpressions"] = 11] = "ArgumentExpressions";
-            ParsingContext[ParsingContext["ObjectLiteralMembers"] = 12] = "ObjectLiteralMembers";
-            ParsingContext[ParsingContext["JsxAttributes"] = 13] = "JsxAttributes";
-            ParsingContext[ParsingContext["JsxChildren"] = 14] = "JsxChildren";
-            ParsingContext[ParsingContext["ArrayLiteralMembers"] = 15] = "ArrayLiteralMembers";
-            ParsingContext[ParsingContext["Parameters"] = 16] = "Parameters";
-            ParsingContext[ParsingContext["TypeParameters"] = 17] = "TypeParameters";
-            ParsingContext[ParsingContext["TypeArguments"] = 18] = "TypeArguments";
-            ParsingContext[ParsingContext["TupleElementTypes"] = 19] = "TupleElementTypes";
-            ParsingContext[ParsingContext["HeritageClauses"] = 20] = "HeritageClauses";
-            ParsingContext[ParsingContext["ImportOrExportSpecifiers"] = 21] = "ImportOrExportSpecifiers";
-            ParsingContext[ParsingContext["JSDocFunctionParameters"] = 22] = "JSDocFunctionParameters";
-            ParsingContext[ParsingContext["JSDocTypeArguments"] = 23] = "JSDocTypeArguments";
-            ParsingContext[ParsingContext["JSDocRecordMembers"] = 24] = "JSDocRecordMembers";
-            ParsingContext[ParsingContext["JSDocTupleTypes"] = 25] = "JSDocTupleTypes";
-            ParsingContext[ParsingContext["Count"] = 26] = "Count"; // Number of parsing contexts
-        })(ParsingContext || (ParsingContext = {}));
-        var Tristate;
-        (function (Tristate) {
-            Tristate[Tristate["False"] = 0] = "False";
-            Tristate[Tristate["True"] = 1] = "True";
-            Tristate[Tristate["Unknown"] = 2] = "Unknown";
-        })(Tristate || (Tristate = {}));
-        var JSDocParser;
-        (function (JSDocParser) {
-            function isJSDocType() {
-                switch (token) {
-                    case 37 /* AsteriskToken */:
-                    case 53 /* QuestionToken */:
-                    case 17 /* OpenParenToken */:
-                    case 19 /* OpenBracketToken */:
-                    case 49 /* ExclamationToken */:
-                    case 15 /* OpenBraceToken */:
-                    case 87 /* FunctionKeyword */:
-                    case 22 /* DotDotDotToken */:
-                    case 92 /* NewKeyword */:
-                    case 97 /* ThisKeyword */:
-                        return true;
-                }
-                return ts.tokenIsIdentifierOrKeyword(token);
-            }
-            JSDocParser.isJSDocType = isJSDocType;
-            function parseJSDocTypeExpressionForTests(content, start, length) {
-                initializeState("file.js", content, 2 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
-                scanner.setText(content, start, length);
-                token = scanner.scan();
-                var jsDocTypeExpression = parseJSDocTypeExpression();
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
-            }
-            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
-            // Parses out a JSDoc type expression.
-            /* @internal */
-            function parseJSDocTypeExpression() {
-                var result = createNode(257 /* JSDocTypeExpression */, scanner.getTokenPos());
-                parseExpected(15 /* OpenBraceToken */);
-                result.type = parseJSDocTopLevelType();
-                parseExpected(16 /* CloseBraceToken */);
-                fixupParentReferences(result);
-                return finishNode(result);
-            }
-            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
-            function parseJSDocTopLevelType() {
-                var type = parseJSDocType();
-                if (token === 47 /* BarToken */) {
-                    var unionType = createNode(261 /* JSDocUnionType */, type.pos);
-                    unionType.types = parseJSDocTypeList(type);
-                    type = finishNode(unionType);
-                }
-                if (token === 56 /* EqualsToken */) {
-                    var optionalType = createNode(268 /* JSDocOptionalType */, type.pos);
-                    nextToken();
-                    optionalType.type = type;
-                    type = finishNode(optionalType);
-                }
-                return type;
-            }
-            function parseJSDocType() {
-                var type = parseBasicTypeExpression();
-                while (true) {
-                    if (token === 19 /* OpenBracketToken */) {
-                        var arrayType = createNode(260 /* JSDocArrayType */, type.pos);
-                        arrayType.elementType = type;
-                        nextToken();
-                        parseExpected(20 /* CloseBracketToken */);
-                        type = finishNode(arrayType);
-                    }
-                    else if (token === 53 /* QuestionToken */) {
-                        var nullableType = createNode(263 /* JSDocNullableType */, type.pos);
-                        nullableType.type = type;
-                        nextToken();
-                        type = finishNode(nullableType);
-                    }
-                    else if (token === 49 /* ExclamationToken */) {
-                        var nonNullableType = createNode(264 /* JSDocNonNullableType */, type.pos);
-                        nonNullableType.type = type;
-                        nextToken();
-                        type = finishNode(nonNullableType);
-                    }
-                    else {
-                        break;
-                    }
-                }
-                return type;
-            }
-            function parseBasicTypeExpression() {
-                switch (token) {
-                    case 37 /* AsteriskToken */:
-                        return parseJSDocAllType();
-                    case 53 /* QuestionToken */:
-                        return parseJSDocUnknownOrNullableType();
-                    case 17 /* OpenParenToken */:
-                        return parseJSDocUnionType();
-                    case 19 /* OpenBracketToken */:
-                        return parseJSDocTupleType();
-                    case 49 /* ExclamationToken */:
-                        return parseJSDocNonNullableType();
-                    case 15 /* OpenBraceToken */:
-                        return parseJSDocRecordType();
-                    case 87 /* FunctionKeyword */:
-                        return parseJSDocFunctionType();
-                    case 22 /* DotDotDotToken */:
-                        return parseJSDocVariadicType();
-                    case 92 /* NewKeyword */:
-                        return parseJSDocConstructorType();
-                    case 97 /* ThisKeyword */:
-                        return parseJSDocThisType();
-                    case 117 /* AnyKeyword */:
-                    case 132 /* StringKeyword */:
-                    case 130 /* NumberKeyword */:
-                    case 120 /* BooleanKeyword */:
-                    case 133 /* SymbolKeyword */:
-                    case 103 /* VoidKeyword */:
-                        return parseTokenNode();
-                }
-                // TODO (drosen): Parse string literal types in JSDoc as well.
-                return parseJSDocTypeReference();
-            }
-            function parseJSDocThisType() {
-                var result = createNode(272 /* JSDocThisType */);
-                nextToken();
-                parseExpected(54 /* ColonToken */);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocConstructorType() {
-                var result = createNode(271 /* JSDocConstructorType */);
-                nextToken();
-                parseExpected(54 /* ColonToken */);
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocVariadicType() {
-                var result = createNode(270 /* JSDocVariadicType */);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocFunctionType() {
-                var result = createNode(269 /* JSDocFunctionType */);
-                nextToken();
-                parseExpected(17 /* OpenParenToken */);
-                result.parameters = parseDelimitedList(22 /* JSDocFunctionParameters */, parseJSDocParameter);
-                checkForTrailingComma(result.parameters);
-                parseExpected(18 /* CloseParenToken */);
-                if (token === 54 /* ColonToken */) {
-                    nextToken();
-                    result.type = parseJSDocType();
-                }
-                return finishNode(result);
-            }
-            function parseJSDocParameter() {
-                var parameter = createNode(142 /* Parameter */);
-                parameter.type = parseJSDocType();
-                if (parseOptional(56 /* EqualsToken */)) {
-                    parameter.questionToken = createNode(56 /* EqualsToken */);
-                }
-                return finishNode(parameter);
-            }
-            function parseJSDocTypeReference() {
-                var result = createNode(267 /* JSDocTypeReference */);
-                result.name = parseSimplePropertyName();
-                if (token === 25 /* LessThanToken */) {
-                    result.typeArguments = parseTypeArguments();
-                }
-                else {
-                    while (parseOptional(21 /* DotToken */)) {
-                        if (token === 25 /* LessThanToken */) {
-                            result.typeArguments = parseTypeArguments();
-                            break;
-                        }
-                        else {
-                            result.name = parseQualifiedName(result.name);
-                        }
-                    }
-                }
-                return finishNode(result);
-            }
-            function parseTypeArguments() {
-                // Move past the <
-                nextToken();
-                var typeArguments = parseDelimitedList(23 /* JSDocTypeArguments */, parseJSDocType);
-                checkForTrailingComma(typeArguments);
-                checkForEmptyTypeArgumentList(typeArguments);
-                parseExpected(27 /* GreaterThanToken */);
-                return typeArguments;
-            }
-            function checkForEmptyTypeArgumentList(typeArguments) {
-                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
-                    var start = typeArguments.pos - "<".length;
-                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
-                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
-                }
-            }
-            function parseQualifiedName(left) {
-                var result = createNode(139 /* QualifiedName */, left.pos);
-                result.left = left;
-                result.right = parseIdentifierName();
-                return finishNode(result);
-            }
-            function parseJSDocRecordType() {
-                var result = createNode(265 /* JSDocRecordType */);
-                nextToken();
-                result.members = parseDelimitedList(24 /* JSDocRecordMembers */, parseJSDocRecordMember);
-                checkForTrailingComma(result.members);
-                parseExpected(16 /* CloseBraceToken */);
-                return finishNode(result);
-            }
-            function parseJSDocRecordMember() {
-                var result = createNode(266 /* JSDocRecordMember */);
-                result.name = parseSimplePropertyName();
-                if (token === 54 /* ColonToken */) {
-                    nextToken();
-                    result.type = parseJSDocType();
-                }
-                return finishNode(result);
-            }
-            function parseJSDocNonNullableType() {
-                var result = createNode(264 /* JSDocNonNullableType */);
-                nextToken();
-                result.type = parseJSDocType();
-                return finishNode(result);
-            }
-            function parseJSDocTupleType() {
-                var result = createNode(262 /* JSDocTupleType */);
-                nextToken();
-                result.types = parseDelimitedList(25 /* JSDocTupleTypes */, parseJSDocType);
-                checkForTrailingComma(result.types);
-                parseExpected(20 /* CloseBracketToken */);
-                return finishNode(result);
-            }
-            function checkForTrailingComma(list) {
-                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
-                    var start = list.end - ",".length;
-                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
-                }
-            }
-            function parseJSDocUnionType() {
-                var result = createNode(261 /* JSDocUnionType */);
-                nextToken();
-                result.types = parseJSDocTypeList(parseJSDocType());
-                parseExpected(18 /* CloseParenToken */);
-                return finishNode(result);
-            }
-            function parseJSDocTypeList(firstType) {
-                ts.Debug.assert(!!firstType);
-                var types = [];
-                types.pos = firstType.pos;
-                types.push(firstType);
-                while (parseOptional(47 /* BarToken */)) {
-                    types.push(parseJSDocType());
-                }
-                types.end = scanner.getStartPos();
-                return types;
-            }
-            function parseJSDocAllType() {
-                var result = createNode(258 /* JSDocAllType */);
-                nextToken();
-                return finishNode(result);
-            }
-            function parseJSDocUnknownOrNullableType() {
-                var pos = scanner.getStartPos();
-                // skip the ?
-                nextToken();
-                // Need to lookahead to decide if this is a nullable or unknown type.
-                // Here are cases where we'll pick the unknown type:
-                //
-                //      Foo(?,
-                //      { a: ? }
-                //      Foo(?)
-                //      Foo<?>
-                //      Foo(?=
-                //      (?|
-                if (token === 24 /* CommaToken */ ||
-                    token === 16 /* CloseBraceToken */ ||
-                    token === 18 /* CloseParenToken */ ||
-                    token === 27 /* GreaterThanToken */ ||
-                    token === 56 /* EqualsToken */ ||
-                    token === 47 /* BarToken */) {
-                    var result = createNode(259 /* JSDocUnknownType */, pos);
-                    return finishNode(result);
-                }
-                else {
-                    var result = createNode(263 /* JSDocNullableType */, pos);
-                    result.type = parseJSDocType();
-                    return finishNode(result);
-                }
-            }
-            function parseIsolatedJSDocComment(content, start, length) {
-                initializeState("file.js", content, 2 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
-                sourceFile = { languageVariant: 0 /* Standard */, text: content };
-                var jsDocComment = parseJSDocCommentWorker(start, length);
-                var diagnostics = parseDiagnostics;
-                clearState();
-                return jsDocComment ? { jsDocComment: jsDocComment, diagnostics: diagnostics } : undefined;
-            }
-            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
-            function parseJSDocComment(parent, start, length) {
-                var saveToken = token;
-                var saveParseDiagnosticsLength = parseDiagnostics.length;
-                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
-                var comment = parseJSDocCommentWorker(start, length);
-                if (comment) {
-                    comment.parent = parent;
-                }
-                token = saveToken;
-                parseDiagnostics.length = saveParseDiagnosticsLength;
-                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
-                return comment;
-            }
-            JSDocParser.parseJSDocComment = parseJSDocComment;
-            function parseJSDocCommentWorker(start, length) {
-                var content = sourceText;
-                start = start || 0;
-                var end = length === undefined ? content.length : start + length;
-                length = end - start;
-                ts.Debug.assert(start >= 0);
-                ts.Debug.assert(start <= end);
-                ts.Debug.assert(end <= content.length);
-                var tags;
-                var result;
-                // Check for /** (JSDoc opening part)
-                if (content.charCodeAt(start) === 47 /* slash */ &&
-                    content.charCodeAt(start + 1) === 42 /* asterisk */ &&
-                    content.charCodeAt(start + 2) === 42 /* asterisk */ &&
-                    content.charCodeAt(start + 3) !== 42 /* asterisk */) {
-                    // + 3 for leading /**, - 5 in total for /** */
-                    scanner.scanRange(start + 3, length - 5, function () {
-                        // Initially we can parse out a tag.  We also have seen a starting asterisk.
-                        // This is so that /** * @type */ doesn't parse.
-                        var canParseTag = true;
-                        var seenAsterisk = true;
-                        nextJSDocToken();
-                        while (token !== 1 /* EndOfFileToken */) {
-                            switch (token) {
-                                case 55 /* AtToken */:
-                                    if (canParseTag) {
-                                        parseTag();
-                                    }
-                                    // This will take us to the end of the line, so it's OK to parse a tag on the next pass through the loop
-                                    seenAsterisk = false;
-                                    break;
-                                case 4 /* NewLineTrivia */:
-                                    // After a line break, we can parse a tag, and we haven't seen an asterisk on the next line yet
-                                    canParseTag = true;
-                                    seenAsterisk = false;
-                                    break;
-                                case 37 /* AsteriskToken */:
-                                    if (seenAsterisk) {
-                                        // If we've already seen an asterisk, then we can no longer parse a tag on this line
-                                        canParseTag = false;
-                                    }
-                                    // Ignore the first asterisk on a line
-                                    seenAsterisk = true;
-                                    break;
-                                case 69 /* Identifier */:
-                                    // Anything else is doc comment text.  We can't do anything with it.  Because it
-                                    // wasn't a tag, we can no longer parse a tag on this line until we hit the next
-                                    // line break.
-                                    canParseTag = false;
-                                    break;
-                                case 1 /* EndOfFileToken */:
-                                    break;
-                            }
-                            nextJSDocToken();
-                        }
-                        result = createJSDocComment();
-                    });
-                }
-                return result;
-                function createJSDocComment() {
-                    if (!tags) {
-                        return undefined;
-                    }
-                    var result = createNode(273 /* JSDocComment */, start);
-                    result.tags = tags;
-                    return finishNode(result, end);
-                }
-                function skipWhitespace() {
-                    while (token === 5 /* WhitespaceTrivia */ || token === 4 /* NewLineTrivia */) {
-                        nextJSDocToken();
-                    }
-                }
-                function parseTag() {
-                    ts.Debug.assert(token === 55 /* AtToken */);
-                    var atToken = createNode(55 /* AtToken */, scanner.getTokenPos());
-                    atToken.end = scanner.getTextPos();
-                    nextJSDocToken();
-                    var tagName = parseJSDocIdentifierName();
-                    if (!tagName) {
-                        return;
-                    }
-                    var tag = handleTag(atToken, tagName) || handleUnknownTag(atToken, tagName);
-                    addTag(tag);
-                }
-                function handleTag(atToken, tagName) {
-                    if (tagName) {
-                        switch (tagName.text) {
-                            case "param":
-                                return handleParamTag(atToken, tagName);
-                            case "return":
-                            case "returns":
-                                return handleReturnTag(atToken, tagName);
-                            case "template":
-                                return handleTemplateTag(atToken, tagName);
-                            case "type":
-                                return handleTypeTag(atToken, tagName);
-                        }
-                    }
-                    return undefined;
-                }
-                function handleUnknownTag(atToken, tagName) {
-                    var result = createNode(274 /* JSDocTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    return finishNode(result);
-                }
-                function addTag(tag) {
-                    if (tag) {
-                        if (!tags) {
-                            tags = [];
-                            tags.pos = tag.pos;
-                        }
-                        tags.push(tag);
-                        tags.end = tag.end;
-                    }
-                }
-                function tryParseTypeExpression() {
-                    if (token !== 15 /* OpenBraceToken */) {
-                        return undefined;
-                    }
-                    var typeExpression = parseJSDocTypeExpression();
-                    return typeExpression;
-                }
-                function handleParamTag(atToken, tagName) {
-                    var typeExpression = tryParseTypeExpression();
-                    skipWhitespace();
-                    var name;
-                    var isBracketed;
-                    // Looking for something like '[foo]' or 'foo'
-                    if (parseOptionalToken(19 /* OpenBracketToken */)) {
-                        name = parseJSDocIdentifierName();
-                        isBracketed = true;
-                        // May have an optional default, e.g. '[foo = 42]'
-                        if (parseOptionalToken(56 /* EqualsToken */)) {
-                            parseExpression();
-                        }
-                        parseExpected(20 /* CloseBracketToken */);
-                    }
-                    else if (ts.tokenIsIdentifierOrKeyword(token)) {
-                        name = parseJSDocIdentifierName();
-                    }
-                    if (!name) {
-                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var preName, postName;
-                    if (typeExpression) {
-                        postName = name;
-                    }
-                    else {
-                        preName = name;
-                    }
-                    if (!typeExpression) {
-                        typeExpression = tryParseTypeExpression();
-                    }
-                    var result = createNode(275 /* JSDocParameterTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.preParameterName = preName;
-                    result.typeExpression = typeExpression;
-                    result.postParameterName = postName;
-                    result.isBracketed = isBracketed;
-                    return finishNode(result);
-                }
-                function handleReturnTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 276 /* JSDocReturnTag */; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(276 /* JSDocReturnTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
-                }
-                function handleTypeTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 277 /* JSDocTypeTag */; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    var result = createNode(277 /* JSDocTypeTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeExpression = tryParseTypeExpression();
-                    return finishNode(result);
-                }
-                function handleTemplateTag(atToken, tagName) {
-                    if (ts.forEach(tags, function (t) { return t.kind === 278 /* JSDocTemplateTag */; })) {
-                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
-                    }
-                    // Type parameter list looks like '@template T,U,V'
-                    var typeParameters = [];
-                    typeParameters.pos = scanner.getStartPos();
-                    while (true) {
-                        var name_8 = parseJSDocIdentifierName();
-                        if (!name_8) {
-                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
-                            return undefined;
-                        }
-                        var typeParameter = createNode(141 /* TypeParameter */, name_8.pos);
-                        typeParameter.name = name_8;
-                        finishNode(typeParameter);
-                        typeParameters.push(typeParameter);
-                        if (token === 24 /* CommaToken */) {
-                            nextJSDocToken();
-                        }
-                        else {
-                            break;
-                        }
-                    }
-                    var result = createNode(278 /* JSDocTemplateTag */, atToken.pos);
-                    result.atToken = atToken;
-                    result.tagName = tagName;
-                    result.typeParameters = typeParameters;
-                    finishNode(result);
-                    typeParameters.end = result.end;
-                    return result;
-                }
-                function nextJSDocToken() {
-                    return token = scanner.scanJSDocToken();
-                }
-                function parseJSDocIdentifierName() {
-                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token));
-                }
-                function createJSDocIdentifier(isIdentifier) {
-                    if (!isIdentifier) {
-                        parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
-                        return undefined;
-                    }
-                    var pos = scanner.getTokenPos();
-                    var end = scanner.getTextPos();
-                    var result = createNode(69 /* Identifier */, pos);
-                    result.text = content.substring(pos, end);
-                    finishNode(result, end);
-                    nextJSDocToken();
-                    return result;
-                }
-            }
-            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
-        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
-    })(Parser || (Parser = {}));
-    var IncrementalParser;
-    (function (IncrementalParser) {
-        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2 /* Aggressive */);
-            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
-            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
-                // if the text didn't change, then we can just return our current source file as-is.
-                return sourceFile;
-            }
-            if (sourceFile.statements.length === 0) {
-                // If we don't have any statements in the current source file, then there's no real
-                // way to incrementally parse.  So just do a full parse instead.
-                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, /*syntaxCursor*/ undefined, /*setParentNodes*/ true, sourceFile.scriptKind);
-            }
-            // Make sure we're not trying to incrementally update a source file more than once.  Once
-            // we do an update the original source file is considered unusable from that point onwards.
-            //
-            // This is because we do incremental parsing in-place.  i.e. we take nodes from the old
-            // tree and give them new positions and parents.  From that point on, trusting the old
-            // tree at all is not possible as far too much of it may violate invariants.
-            var incrementalSourceFile = sourceFile;
-            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
-            incrementalSourceFile.hasBeenIncrementallyParsed = true;
-            var oldText = sourceFile.text;
-            var syntaxCursor = createSyntaxCursor(sourceFile);
-            // Make the actual change larger so that we know to reparse anything whose lookahead
-            // might have intersected the change.
-            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
-            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
-            // Ensure that extending the affected range only moved the start of the change range
-            // earlier in the file.
-            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
-            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
-            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
-            // The is the amount the nodes after the edit range need to be adjusted.  It can be
-            // positive (if the edit added characters), negative (if the edit deleted characters)
-            // or zero (if this was a pure overwrite with nothing added/removed).
-            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
-            // If we added or removed characters during the edit, then we need to go and adjust all
-            // the nodes after the edit.  Those nodes may move forward (if we inserted chars) or they
-            // may move backward (if we deleted chars).
-            //
-            // Doing this helps us out in two ways.  First, it means that any nodes/tokens we want
-            // to reuse are already at the appropriate position in the new text.  That way when we
-            // reuse them, we don't have to figure out if they need to be adjusted.  Second, it makes
-            // it very easy to determine if we can reuse a node.  If the node's position is at where
-            // we are in the text, then we can reuse it.  Otherwise we can't.  If the node's position
-            // is ahead of us, then we'll need to rescan tokens.  If the node's position is behind
-            // us, then we'll need to skip it or crumble it as appropriate
-            //
-            // We will also adjust the positions of nodes that intersect the change range as well.
-            // By doing this, we ensure that all the positions in the old tree are consistent, not
-            // just the positions of nodes entirely before/after the change range.  By being
-            // consistent, we can then easily map from positions to nodes in the old tree easily.
-            //
-            // Also, mark any syntax elements that intersect the changed span.  We know, up front,
-            // that we cannot reuse these elements.
-            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
-            // Now that we've set up our internal incremental state just proceed and parse the
-            // source file in the normal fashion.  When possible the parser will retrieve and
-            // reuse nodes from the old tree.
-            //
-            // Note: passing in 'true' for setNodeParents is very important.  When incrementally
-            // parsing, we will be reusing nodes from the old tree, and placing it into new
-            // parents.  If we don't set the parents now, we'll end up with an observably
-            // inconsistent tree.  Setting the parents on the new tree should be very fast.  We
-            // will immediately bail out of walking any subtrees when we can see that their parents
-            // are already correct.
-            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, /*setParentNodes*/ true, sourceFile.scriptKind);
-            return result;
-        }
-        IncrementalParser.updateSourceFile = updateSourceFile;
-        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
-            if (isArray) {
-                visitArray(element);
-            }
-            else {
-                visitNode(element);
-            }
-            return;
-            function visitNode(node) {
-                var text = "";
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    text = oldText.substring(node.pos, node.end);
-                }
-                // Ditch any existing LS children we may have created.  This way we can avoid
-                // moving them forward.
-                if (node._children) {
-                    node._children = undefined;
-                }
-                if (node.jsDocComment) {
-                    node.jsDocComment = undefined;
-                }
-                node.pos += delta;
-                node.end += delta;
-                if (aggressiveChecks && shouldCheckNode(node)) {
-                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
-                }
-                forEachChild(node, visitNode, visitArray);
-                checkNodePositions(node, aggressiveChecks);
-            }
-            function visitArray(array) {
-                array._children = undefined;
-                array.pos += delta;
-                array.end += delta;
-                for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
-                    var node = array_7[_i];
-                    visitNode(node);
-                }
-            }
-        }
-        function shouldCheckNode(node) {
-            switch (node.kind) {
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                case 69 /* Identifier */:
-                    return true;
-            }
-            return false;
-        }
-        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
-            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
-            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
-            ts.Debug.assert(element.pos <= element.end);
-            // We have an element that intersects the change range in some way.  It may have its
-            // start, or its end (or both) in the changed range.  We want to adjust any part
-            // that intersects such that the final tree is in a consistent state.  i.e. all
-            // children have spans within the span of their parent, and all siblings are ordered
-            // properly.
-            // We may need to update both the 'pos' and the 'end' of the element.
-            // If the 'pos' is before the start of the change, then we don't need to touch it.
-            // If it isn't, then the 'pos' must be inside the change.  How we update it will
-            // depend if delta is  positive or negative.  If delta is positive then we have
-            // something like:
-            //
-            //  -------------------AAA-----------------
-            //  -------------------BBBCCCCCCC-----------------
-            //
-            // In this case, we consider any node that started in the change range to still be
-            // starting at the same position.
-            //
-            // however, if the delta is negative, then we instead have something like this:
-            //
-            //  -------------------XXXYYYYYYY-----------------
-            //  -------------------ZZZ-----------------
-            //
-            // In this case, any element that started in the 'X' range will keep its position.
-            // However any element that started after that will have their pos adjusted to be
-            // at the end of the new range.  i.e. any node that started in the 'Y' range will
-            // be adjusted to have their start at the end of the 'Z' range.
-            //
-            // The element will keep its position if possible.  Or Move backward to the new-end
-            // if it's in the 'Y' range.
-            element.pos = Math.min(element.pos, changeRangeNewEnd);
-            // If the 'end' is after the change range, then we always adjust it by the delta
-            // amount.  However, if the end is in the change range, then how we adjust it
-            // will depend on if delta is  positive or negative.  If delta is positive then we
-            // have something like:
-            //
-            //  -------------------AAA-----------------
-            //  -------------------BBBCCCCCCC-----------------
-            //
-            // In this case, we consider any node that ended inside the change range to keep its
-            // end position.
-            //
-            // however, if the delta is negative, then we instead have something like this:
-            //
-            //  -------------------XXXYYYYYYY-----------------
-            //  -------------------ZZZ-----------------
-            //
-            // In this case, any element that ended in the 'X' range will keep its position.
-            // However any element that ended after that will have their pos adjusted to be
-            // at the end of the new range.  i.e. any node that ended in the 'Y' range will
-            // be adjusted to have their end at the end of the 'Z' range.
-            if (element.end >= changeRangeOldEnd) {
-                // Element ends after the change range.  Always adjust the end pos.
-                element.end += delta;
-            }
-            else {
-                // Element ends in the change range.  The element will keep its position if
-                // possible. Or Move backward to the new-end if it's in the 'Y' range.
-                element.end = Math.min(element.end, changeRangeNewEnd);
-            }
-            ts.Debug.assert(element.pos <= element.end);
-            if (element.parent) {
-                ts.Debug.assert(element.pos >= element.parent.pos);
-                ts.Debug.assert(element.end <= element.parent.end);
-            }
-        }
-        function checkNodePositions(node, aggressiveChecks) {
-            if (aggressiveChecks) {
-                var pos_2 = node.pos;
-                forEachChild(node, function (child) {
-                    ts.Debug.assert(child.pos >= pos_2);
-                    pos_2 = child.end;
-                });
-                ts.Debug.assert(pos_2 <= node.end);
-            }
-        }
-        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
-            visitNode(sourceFile);
-            return;
-            function visitNode(child) {
-                ts.Debug.assert(child.pos <= child.end);
-                if (child.pos > changeRangeOldEnd) {
-                    // Node is entirely past the change range.  We need to move both its pos and
-                    // end, forward or backward appropriately.
-                    moveElementEntirelyPastChangeRange(child, /*isArray*/ false, delta, oldText, newText, aggressiveChecks);
-                    return;
-                }
-                // Check if the element intersects the change range.  If it does, then it is not
-                // reusable.  Also, we'll need to recurse to see what constituent portions we may
-                // be able to use.
-                var fullEnd = child.end;
-                if (fullEnd >= changeStart) {
-                    child.intersectsChange = true;
-                    child._children = undefined;
-                    // Adjust the pos or end (or both) of the intersecting element accordingly.
-                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    forEachChild(child, visitNode, visitArray);
-                    checkNodePositions(child, aggressiveChecks);
-                    return;
-                }
-                // Otherwise, the node is entirely before the change range.  No need to do anything with it.
-                ts.Debug.assert(fullEnd < changeStart);
-            }
-            function visitArray(array) {
-                ts.Debug.assert(array.pos <= array.end);
-                if (array.pos > changeRangeOldEnd) {
-                    // Array is entirely after the change range.  We need to move it, and move any of
-                    // its children.
-                    moveElementEntirelyPastChangeRange(array, /*isArray*/ true, delta, oldText, newText, aggressiveChecks);
-                    return;
-                }
-                // Check if the element intersects the change range.  If it does, then it is not
-                // reusable.  Also, we'll need to recurse to see what constituent portions we may
-                // be able to use.
-                var fullEnd = array.end;
-                if (fullEnd >= changeStart) {
-                    array.intersectsChange = true;
-                    array._children = undefined;
-                    // Adjust the pos or end (or both) of the intersecting array accordingly.
-                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
-                    for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
-                        var node = array_8[_i];
-                        visitNode(node);
-                    }
-                    return;
-                }
-                // Otherwise, the array is entirely before the change range.  No need to do anything with it.
-                ts.Debug.assert(fullEnd < changeStart);
-            }
-        }
-        function extendToAffectedRange(sourceFile, changeRange) {
-            // Consider the following code:
-            //      void foo() { /; }
-            //
-            // If the text changes with an insertion of / just before the semicolon then we end up with:
-            //      void foo() { //; }
-            //
-            // If we were to just use the changeRange a is, then we would not rescan the { token
-            // (as it does not intersect the actual original change range).  Because an edit may
-            // change the token touching it, we actually need to look back *at least* one token so
-            // that the prior token sees that change.
-            var maxLookahead = 1;
-            var start = changeRange.span.start;
-            // the first iteration aligns us with the change start. subsequent iteration move us to
-            // the left by maxLookahead tokens.  We only need to do this as long as we're not at the
-            // start of the tree.
-            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
-                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
-                ts.Debug.assert(nearestNode.pos <= start);
-                var position = nearestNode.pos;
-                start = Math.max(0, position - 1);
-            }
-            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
-            var finalLength = changeRange.newLength + (changeRange.span.start - start);
-            return ts.createTextChangeRange(finalSpan, finalLength);
-        }
-        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
-            var bestResult = sourceFile;
-            var lastNodeEntirelyBeforePosition;
-            forEachChild(sourceFile, visit);
-            if (lastNodeEntirelyBeforePosition) {
-                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
-                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
-                    bestResult = lastChildOfLastEntireNodeBeforePosition;
-                }
-            }
-            return bestResult;
-            function getLastChild(node) {
-                while (true) {
-                    var lastChild = getLastChildWorker(node);
-                    if (lastChild) {
-                        node = lastChild;
-                    }
-                    else {
-                        return node;
-                    }
-                }
-            }
-            function getLastChildWorker(node) {
-                var last = undefined;
-                forEachChild(node, function (child) {
-                    if (ts.nodeIsPresent(child)) {
-                        last = child;
-                    }
-                });
-                return last;
-            }
-            function visit(child) {
-                if (ts.nodeIsMissing(child)) {
-                    // Missing nodes are effectively invisible to us.  We never even consider them
-                    // When trying to find the nearest node before us.
-                    return;
-                }
-                // If the child intersects this position, then this node is currently the nearest
-                // node that starts before the position.
-                if (child.pos <= position) {
-                    if (child.pos >= bestResult.pos) {
-                        // This node starts before the position, and is closer to the position than
-                        // the previous best node we found.  It is now the new best node.
-                        bestResult = child;
-                    }
-                    // Now, the node may overlap the position, or it may end entirely before the
-                    // position.  If it overlaps with the position, then either it, or one of its
-                    // children must be the nearest node before the position.  So we can just
-                    // recurse into this child to see if we can find something better.
-                    if (position < child.end) {
-                        // The nearest node is either this child, or one of the children inside
-                        // of it.  We've already marked this child as the best so far.  Recurse
-                        // in case one of the children is better.
-                        forEachChild(child, visit);
-                        // Once we look at the children of this node, then there's no need to
-                        // continue any further.
-                        return true;
-                    }
-                    else {
-                        ts.Debug.assert(child.end <= position);
-                        // The child ends entirely before this position.  Say you have the following
-                        // (where $ is the position)
-                        //
-                        //      <complex expr 1> ? <complex expr 2> $ : <...> <...>
-                        //
-                        // We would want to find the nearest preceding node in "complex expr 2".
-                        // To support that, we keep track of this node, and once we're done searching
-                        // for a best node, we recurse down this node to see if we can find a good
-                        // result in it.
-                        //
-                        // This approach allows us to quickly skip over nodes that are entirely
-                        // before the position, while still allowing us to find any nodes in the
-                        // last one that might be what we want.
-                        lastNodeEntirelyBeforePosition = child;
-                    }
-                }
-                else {
-                    ts.Debug.assert(child.pos > position);
-                    // We're now at a node that is entirely past the position we're searching for.
-                    // This node (and all following nodes) could never contribute to the result,
-                    // so just skip them by returning 'true' here.
-                    return true;
-                }
-            }
-        }
-        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
-            var oldText = sourceFile.text;
-            if (textChangeRange) {
-                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
-                if (aggressiveChecks || ts.Debug.shouldAssert(3 /* VeryAggressive */)) {
-                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
-                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
-                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
-                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
-                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
-                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
-                }
-            }
-        }
-        function createSyntaxCursor(sourceFile) {
-            var currentArray = sourceFile.statements;
-            var currentArrayIndex = 0;
-            ts.Debug.assert(currentArrayIndex < currentArray.length);
-            var current = currentArray[currentArrayIndex];
-            var lastQueriedPosition = -1 /* Value */;
-            return {
-                currentNode: function (position) {
-                    // Only compute the current node if the position is different than the last time
-                    // we were asked.  The parser commonly asks for the node at the same position
-                    // twice.  Once to know if can read an appropriate list element at a certain point,
-                    // and then to actually read and consume the node.
-                    if (position !== lastQueriedPosition) {
-                        // Much of the time the parser will need the very next node in the array that
-                        // we just returned a node from.So just simply check for that case and move
-                        // forward in the array instead of searching for the node again.
-                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
-                            currentArrayIndex++;
-                            current = currentArray[currentArrayIndex];
-                        }
-                        // If we don't have a node, or the node we have isn't in the right position,
-                        // then try to find a viable node at the position requested.
-                        if (!current || current.pos !== position) {
-                            findHighestListElementThatStartsAtPosition(position);
-                        }
-                    }
-                    // Cache this query so that we don't do any extra work if the parser calls back
-                    // into us.  Note: this is very common as the parser will make pairs of calls like
-                    // 'isListElement -> parseListElement'.  If we were unable to find a node when
-                    // called with 'isListElement', we don't want to redo the work when parseListElement
-                    // is called immediately after.
-                    lastQueriedPosition = position;
-                    // Either we don'd have a node, or we have a node at the position being asked for.
-                    ts.Debug.assert(!current || current.pos === position);
-                    return current;
-                }
-            };
-            // Finds the highest element in the tree we can find that starts at the provided position.
-            // The element must be a direct child of some node list in the tree.  This way after we
-            // return it, we can easily return its next sibling in the list.
-            function findHighestListElementThatStartsAtPosition(position) {
-                // Clear out any cached state about the last node we found.
-                currentArray = undefined;
-                currentArrayIndex = -1 /* Value */;
-                current = undefined;
-                // Recurse into the source file to find the highest node at this position.
-                forEachChild(sourceFile, visitNode, visitArray);
-                return;
-                function visitNode(node) {
-                    if (position >= node.pos && position < node.end) {
-                        // Position was within this node.  Keep searching deeper to find the node.
-                        forEachChild(node, visitNode, visitArray);
-                        // don't proceed any further in the search.
-                        return true;
-                    }
-                    // position wasn't in this node, have to keep searching.
-                    return false;
-                }
-                function visitArray(array) {
-                    if (position >= array.pos && position < array.end) {
-                        // position was in this array.  Search through this array to see if we find a
-                        // viable element.
-                        for (var i = 0, n = array.length; i < n; i++) {
-                            var child = array[i];
-                            if (child) {
-                                if (child.pos === position) {
-                                    // Found the right node.  We're done.
-                                    currentArray = array;
-                                    currentArrayIndex = i;
-                                    current = child;
-                                    return true;
-                                }
-                                else {
-                                    if (child.pos < position && position < child.end) {
-                                        // Position in somewhere within this child.  Search in it and
-                                        // stop searching in this array.
-                                        forEachChild(child, visitNode, visitArray);
-                                        return true;
-                                    }
-                                }
-                            }
-                        }
-                    }
-                    // position wasn't in this array, have to keep searching.
-                    return false;
-                }
-            }
-        }
-        var InvalidPosition;
-        (function (InvalidPosition) {
-            InvalidPosition[InvalidPosition["Value"] = -1] = "Value";
-        })(InvalidPosition || (InvalidPosition = {}));
-    })(IncrementalParser || (IncrementalParser = {}));
-})(ts || (ts = {}));
-/// <reference path="utilities.ts"/>
-/// <reference path="parser.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    ts.bindTime = 0;
-    (function (ModuleInstanceState) {
-        ModuleInstanceState[ModuleInstanceState["NonInstantiated"] = 0] = "NonInstantiated";
-        ModuleInstanceState[ModuleInstanceState["Instantiated"] = 1] = "Instantiated";
-        ModuleInstanceState[ModuleInstanceState["ConstEnumOnly"] = 2] = "ConstEnumOnly";
-    })(ts.ModuleInstanceState || (ts.ModuleInstanceState = {}));
-    var ModuleInstanceState = ts.ModuleInstanceState;
-    function getModuleInstanceState(node) {
-        // A module is uninstantiated if it contains only
-        // 1. interface declarations, type alias declarations
-        if (node.kind === 222 /* InterfaceDeclaration */ || node.kind === 223 /* TypeAliasDeclaration */) {
-            return 0 /* NonInstantiated */;
-        }
-        else if (ts.isConstEnumDeclaration(node)) {
-            return 2 /* ConstEnumOnly */;
-        }
-        else if ((node.kind === 230 /* ImportDeclaration */ || node.kind === 229 /* ImportEqualsDeclaration */) && !(node.flags & 1 /* Export */)) {
-            return 0 /* NonInstantiated */;
-        }
-        else if (node.kind === 226 /* ModuleBlock */) {
-            var state_1 = 0 /* NonInstantiated */;
-            ts.forEachChild(node, function (n) {
-                switch (getModuleInstanceState(n)) {
-                    case 0 /* NonInstantiated */:
-                        // child is non-instantiated - continue searching
-                        return false;
-                    case 2 /* ConstEnumOnly */:
-                        // child is const enum only - record state and continue searching
-                        state_1 = 2 /* ConstEnumOnly */;
-                        return false;
-                    case 1 /* Instantiated */:
-                        // child is instantiated - record state and stop
-                        state_1 = 1 /* Instantiated */;
-                        return true;
-                }
-            });
-            return state_1;
-        }
-        else if (node.kind === 225 /* ModuleDeclaration */) {
-            return getModuleInstanceState(node.body);
-        }
-        else {
-            return 1 /* Instantiated */;
-        }
-    }
-    ts.getModuleInstanceState = getModuleInstanceState;
-    var ContainerFlags;
-    (function (ContainerFlags) {
-        // The current node is not a container, and no container manipulation should happen before
-        // recursing into it.
-        ContainerFlags[ContainerFlags["None"] = 0] = "None";
-        // The current node is a container.  It should be set as the current container (and block-
-        // container) before recursing into it.  The current node does not have locals.  Examples:
-        //
-        //      Classes, ObjectLiterals, TypeLiterals, Interfaces...
-        ContainerFlags[ContainerFlags["IsContainer"] = 1] = "IsContainer";
-        // The current node is a block-scoped-container.  It should be set as the current block-
-        // container before recursing into it.  Examples:
-        //
-        //      Blocks (when not parented by functions), Catch clauses, For/For-in/For-of statements...
-        ContainerFlags[ContainerFlags["IsBlockScopedContainer"] = 2] = "IsBlockScopedContainer";
-        ContainerFlags[ContainerFlags["HasLocals"] = 4] = "HasLocals";
-        // If the current node is a container that also container that also contains locals.  Examples:
-        //
-        //      Functions, Methods, Modules, Source-files.
-        ContainerFlags[ContainerFlags["IsContainerWithLocals"] = 5] = "IsContainerWithLocals";
-    })(ContainerFlags || (ContainerFlags = {}));
-    var binder = createBinder();
-    function bindSourceFile(file, options) {
-        var start = new Date().getTime();
-        binder(file, options);
-        ts.bindTime += new Date().getTime() - start;
-    }
-    ts.bindSourceFile = bindSourceFile;
-    function createBinder() {
-        var file;
-        var options;
-        var languageVersion;
-        var parent;
-        var container;
-        var blockScopeContainer;
-        var lastContainer;
-        var seenThisKeyword;
-        // state used by reachability checks
-        var hasExplicitReturn;
-        var currentFlow;
-        var currentBreakTarget;
-        var currentContinueTarget;
-        var currentTrueTarget;
-        var currentFalseTarget;
-        var preSwitchCaseFlow;
-        var activeLabels;
-        // state used for emit helpers
-        var hasClassExtends;
-        var hasAsyncFunctions;
-        var hasDecorators;
-        var hasParameterDecorators;
-        var hasJsxSpreadAttribute;
-        // If this file is an external module, then it is automatically in strict-mode according to
-        // ES6.  If it is not an external module, then we'll determine if it is in strict mode or
-        // not depending on if we see "use strict" in certain places (or if we hit a class/namespace).
-        var inStrictMode;
-        var symbolCount = 0;
-        var Symbol;
-        var classifiableNames;
-        var unreachableFlow = { flags: 1 /* Unreachable */ };
-        var reportedUnreachableFlow = { flags: 1 /* Unreachable */ };
-        function bindSourceFile(f, opts) {
-            file = f;
-            options = opts;
-            languageVersion = ts.getEmitScriptTarget(options);
-            inStrictMode = !!file.externalModuleIndicator;
-            classifiableNames = {};
-            symbolCount = 0;
-            Symbol = ts.objectAllocator.getSymbolConstructor();
-            if (!file.locals) {
-                bind(file);
-                file.symbolCount = symbolCount;
-                file.classifiableNames = classifiableNames;
-            }
-            file = undefined;
-            options = undefined;
-            languageVersion = undefined;
-            parent = undefined;
-            container = undefined;
-            blockScopeContainer = undefined;
-            lastContainer = undefined;
-            seenThisKeyword = false;
-            hasExplicitReturn = false;
-            currentFlow = undefined;
-            currentBreakTarget = undefined;
-            currentContinueTarget = undefined;
-            currentTrueTarget = undefined;
-            currentFalseTarget = undefined;
-            activeLabels = undefined;
-            hasClassExtends = false;
-            hasAsyncFunctions = false;
-            hasDecorators = false;
-            hasParameterDecorators = false;
-            hasJsxSpreadAttribute = false;
-        }
-        return bindSourceFile;
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
-        }
-        function addDeclarationToSymbol(symbol, node, symbolFlags) {
-            symbol.flags |= symbolFlags;
-            node.symbol = symbol;
-            if (!symbol.declarations) {
-                symbol.declarations = [];
-            }
-            symbol.declarations.push(node);
-            if (symbolFlags & 1952 /* HasExports */ && !symbol.exports) {
-                symbol.exports = {};
-            }
-            if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
-                symbol.members = {};
-            }
-            if (symbolFlags & 107455 /* Value */) {
-                var valueDeclaration = symbol.valueDeclaration;
-                if (!valueDeclaration ||
-                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 225 /* ModuleDeclaration */)) {
-                    // other kinds of value declarations take precedence over modules
-                    symbol.valueDeclaration = node;
-                }
-            }
-        }
-        // Should not be called on a declaration with a computed property name,
-        // unless it is a well known Symbol.
-        function getDeclarationName(node) {
-            if (node.name) {
-                if (ts.isAmbientModule(node)) {
-                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
-                }
-                if (node.name.kind === 140 /* ComputedPropertyName */) {
-                    var nameExpression = node.name.expression;
-                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
-                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
-                        return nameExpression.text;
-                    }
-                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
-                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
-                }
-                return node.name.text;
-            }
-            switch (node.kind) {
-                case 148 /* Constructor */:
-                    return "__constructor";
-                case 156 /* FunctionType */:
-                case 151 /* CallSignature */:
-                    return "__call";
-                case 157 /* ConstructorType */:
-                case 152 /* ConstructSignature */:
-                    return "__new";
-                case 153 /* IndexSignature */:
-                    return "__index";
-                case 236 /* ExportDeclaration */:
-                    return "__export";
-                case 235 /* ExportAssignment */:
-                    return node.isExportEquals ? "export=" : "default";
-                case 187 /* BinaryExpression */:
-                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
-                        case 2 /* ModuleExports */:
-                            // module.exports = ...
-                            return "export=";
-                        case 1 /* ExportsProperty */:
-                        case 4 /* ThisProperty */:
-                            // exports.x = ... or this.y = ...
-                            return node.left.name.text;
-                        case 3 /* PrototypeProperty */:
-                            // className.prototype.methodName = ...
-                            return node.left.expression.name.text;
-                    }
-                    ts.Debug.fail("Unknown binary declaration kind");
-                    break;
-                case 220 /* FunctionDeclaration */:
-                case 221 /* ClassDeclaration */:
-                    return node.flags & 512 /* Default */ ? "default" : undefined;
-                case 269 /* JSDocFunctionType */:
-                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
-                case 142 /* Parameter */:
-                    // Parameters with names are handled at the top of this function.  Parameters
-                    // without names can only come from JSDocFunctionTypes.
-                    ts.Debug.assert(node.parent.kind === 269 /* JSDocFunctionType */);
-                    var functionType = node.parent;
-                    var index = ts.indexOf(functionType.parameters, node);
-                    return "p" + index;
-            }
-        }
-        function getDisplayName(node) {
-            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
-        }
-        /**
-         * Declares a Symbol for the node and adds it to symbols. Reports errors for conflicting identifier names.
-         * @param symbolTable - The symbol table which node will be added to.
-         * @param parent - node's parent declaration.
-         * @param node - The declaration to be added to the symbol table
-         * @param includes - The SymbolFlags that node has in addition to its declaration type (eg: export, ambient, etc.)
-         * @param excludes - The flags which node cannot be declared alongside in a symbol table. Used to report forbidden declarations.
-         */
-        function declareSymbol(symbolTable, parent, node, includes, excludes) {
-            ts.Debug.assert(!ts.hasDynamicName(node));
-            var isDefaultExport = node.flags & 512 /* Default */;
-            // The exported symbol for an export default function/class node is always named "default"
-            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
-            var symbol;
-            if (name !== undefined) {
-                // Check and see if the symbol table already has a symbol with this name.  If not,
-                // create a new symbol with this name and add it to the table.  Note that we don't
-                // give the new symbol any flags *yet*.  This ensures that it will not conflict
-                // with the 'excludes' flags we pass in.
-                //
-                // If we do get an existing symbol, see if it conflicts with the new symbol we're
-                // creating.  For example, a 'var' symbol and a 'class' symbol will conflict within
-                // the same symbol table.  If we have a conflict, report the issue on each
-                // declaration we have for this symbol, and then create a new symbol for this
-                // declaration.
-                //
-                // If we created a new symbol, either because we didn't have a symbol with this name
-                // in the symbol table, or we conflicted with an existing symbol, then just add this
-                // node as the sole declaration of the new symbol.
-                //
-                // Otherwise, we'll be merging into a compatible existing symbol (for example when
-                // you have multiple 'vars' with the same name in the same container).  In this case
-                // just add this node into the declarations list of the symbol.
-                symbol = ts.hasProperty(symbolTable, name)
-                    ? symbolTable[name]
-                    : (symbolTable[name] = createSymbol(0 /* None */, name));
-                if (name && (includes & 788448 /* Classifiable */)) {
-                    classifiableNames[name] = name;
-                }
-                if (symbol.flags & excludes) {
-                    if (node.name) {
-                        node.name.parent = node;
-                    }
-                    // Report errors every position with duplicate declaration
-                    // Report errors on previous encountered declarations
-                    var message_1 = symbol.flags & 2 /* BlockScopedVariable */
-                        ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
-                        : ts.Diagnostics.Duplicate_identifier_0;
-                    ts.forEach(symbol.declarations, function (declaration) {
-                        if (declaration.flags & 512 /* Default */) {
-                            message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
-                        }
-                    });
-                    ts.forEach(symbol.declarations, function (declaration) {
-                        file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
-                    });
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
-                    symbol = createSymbol(0 /* None */, name);
-                }
-            }
-            else {
-                symbol = createSymbol(0 /* None */, "__missing");
-            }
-            addDeclarationToSymbol(symbol, node, includes);
-            symbol.parent = parent;
-            return symbol;
-        }
-        function declareModuleMember(node, symbolFlags, symbolExcludes) {
-            var hasExportModifier = ts.getCombinedNodeFlags(node) & 1 /* Export */;
-            if (symbolFlags & 8388608 /* Alias */) {
-                if (node.kind === 238 /* ExportSpecifier */ || (node.kind === 229 /* ImportEqualsDeclaration */ && hasExportModifier)) {
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-                }
-            }
-            else {
-                // Exported module members are given 2 symbols: A local symbol that is classified with an ExportValue,
-                // ExportType, or ExportContainer flag, and an associated export symbol with all the correct flags set
-                // on it. There are 2 main reasons:
-                //
-                //   1. We treat locals and exports of the same name as mutually exclusive within a container.
-                //      That means the binder will issue a Duplicate Identifier error if you mix locals and exports
-                //      with the same name in the same container.
-                //      TODO: Make this a more specific error and decouple it from the exclusion logic.
-                //   2. When we checkIdentifier in the checker, we set its resolved symbol to the local symbol,
-                //      but return the export symbol (by calling getExportSymbolOfValueSymbolIfExported). That way
-                //      when the emitter comes back to it, it knows not to qualify the name if it was found in a containing scope.
-                // NOTE: Nested ambient modules always should go to to 'locals' table to prevent their automatic merge
-                //       during global merging in the checker. Why? The only case when ambient module is permitted inside another module is module augmentation
-                //       and this case is specially handled. Module augmentations should only be merged with original module definition
-                //       and should never be merged directly with other augmentation, and the latter case would be possible if automatic merge is allowed.
-                if (!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 8192 /* ExportContext */)) {
-                    var exportKind = (symbolFlags & 107455 /* Value */ ? 1048576 /* ExportValue */ : 0) |
-                        (symbolFlags & 793056 /* Type */ ? 2097152 /* ExportType */ : 0) |
-                        (symbolFlags & 1536 /* Namespace */ ? 4194304 /* ExportNamespace */ : 0);
-                    var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
-                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                    node.localSymbol = local;
-                    return local;
-                }
-                else {
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-                }
-            }
-        }
-        // All container nodes are kept on a linked list in declaration order. This list is used by
-        // the getLocalNameOfContainer function in the type checker to validate that the local name
-        // used for a container is unique.
-        function bindChildren(node) {
-            // Before we recurse into a node's children, we first save the existing parent, container
-            // and block-container.  Then after we pop out of processing the children, we restore
-            // these saved values.
-            var saveParent = parent;
-            var saveContainer = container;
-            var savedBlockScopeContainer = blockScopeContainer;
-            // This node will now be set as the parent of all of its children as we recurse into them.
-            parent = node;
-            // Depending on what kind of node this is, we may have to adjust the current container
-            // and block-container.   If the current node is a container, then it is automatically
-            // considered the current block-container as well.  Also, for containers that we know
-            // may contain locals, we proactively initialize the .locals field. We do this because
-            // it's highly likely that the .locals will be needed to place some child in (for example,
-            // a parameter, or variable declaration).
-            //
-            // However, we do not proactively create the .locals for block-containers because it's
-            // totally normal and common for block-containers to never actually have a block-scoped
-            // variable in them.  We don't want to end up allocating an object for every 'block' we
-            // run into when most of them won't be necessary.
-            //
-            // Finally, if this is a block-container, then we clear out any existing .locals object
-            // it may contain within it.  This happens in incremental scenarios.  Because we can be
-            // reusing a node from a previous compilation, that node may have had 'locals' created
-            // for it.  We must clear this so we don't accidentally move any stale data forward from
-            // a previous compilation.
-            var containerFlags = getContainerFlags(node);
-            if (containerFlags & 1 /* IsContainer */) {
-                container = blockScopeContainer = node;
-                if (containerFlags & 4 /* HasLocals */) {
-                    container.locals = {};
-                }
-                addToContainerChain(container);
-            }
-            else if (containerFlags & 2 /* IsBlockScopedContainer */) {
-                blockScopeContainer = node;
-                blockScopeContainer.locals = undefined;
-            }
-            var savedHasExplicitReturn;
-            var savedCurrentFlow;
-            var savedBreakTarget;
-            var savedContinueTarget;
-            var savedActiveLabels;
-            var kind = node.kind;
-            var flags = node.flags;
-            // reset all reachability check related flags on node (for incremental scenarios)
-            flags &= ~98304 /* ReachabilityCheckFlags */;
-            // reset all emit helper flags on node (for incremental scenarios)
-            flags &= ~3932160 /* EmitHelperFlags */;
-            if (kind === 222 /* InterfaceDeclaration */) {
-                seenThisKeyword = false;
-            }
-            var saveState = kind === 256 /* SourceFile */ || kind === 226 /* ModuleBlock */ || ts.isFunctionLikeKind(kind);
-            if (saveState) {
-                savedHasExplicitReturn = hasExplicitReturn;
-                savedCurrentFlow = currentFlow;
-                savedBreakTarget = currentBreakTarget;
-                savedContinueTarget = currentContinueTarget;
-                savedActiveLabels = activeLabels;
-                hasExplicitReturn = false;
-                currentFlow = { flags: 2 /* Start */ };
-                currentBreakTarget = undefined;
-                currentContinueTarget = undefined;
-                activeLabels = undefined;
-            }
-            if (ts.isInJavaScriptFile(node) && node.jsDocComment) {
-                bind(node.jsDocComment);
-            }
-            bindReachableStatement(node);
-            if (!(currentFlow.flags & 1 /* Unreachable */) && ts.isFunctionLikeKind(kind) && ts.nodeIsPresent(node.body)) {
-                flags |= 32768 /* HasImplicitReturn */;
-                if (hasExplicitReturn) {
-                    flags |= 65536 /* HasExplicitReturn */;
-                }
-            }
-            if (kind === 222 /* InterfaceDeclaration */) {
-                flags = seenThisKeyword ? flags | 16384 /* ContainsThis */ : flags & ~16384 /* ContainsThis */;
-            }
-            if (kind === 256 /* SourceFile */) {
-                if (hasClassExtends) {
-                    flags |= 262144 /* HasClassExtends */;
-                }
-                if (hasDecorators) {
-                    flags |= 524288 /* HasDecorators */;
-                }
-                if (hasParameterDecorators) {
-                    flags |= 1048576 /* HasParamDecorators */;
-                }
-                if (hasAsyncFunctions) {
-                    flags |= 2097152 /* HasAsyncFunctions */;
-                }
-                if (hasJsxSpreadAttribute) {
-                    flags |= 1073741824 /* HasJsxSpreadAttribute */;
-                }
-            }
-            node.flags = flags;
-            if (saveState) {
-                hasExplicitReturn = savedHasExplicitReturn;
-                currentFlow = savedCurrentFlow;
-                currentBreakTarget = savedBreakTarget;
-                currentContinueTarget = savedContinueTarget;
-                activeLabels = savedActiveLabels;
-            }
-            container = saveContainer;
-            parent = saveParent;
-            blockScopeContainer = savedBlockScopeContainer;
-        }
-        /**
-         * Returns true if node and its subnodes were successfully traversed.
-         * Returning false means that node was not examined and caller needs to dive into the node himself.
-         */
-        function bindReachableStatement(node) {
-            if (checkUnreachable(node)) {
-                ts.forEachChild(node, bind);
-                return;
-            }
-            switch (node.kind) {
-                case 205 /* WhileStatement */:
-                    bindWhileStatement(node);
-                    break;
-                case 204 /* DoStatement */:
-                    bindDoStatement(node);
-                    break;
-                case 206 /* ForStatement */:
-                    bindForStatement(node);
-                    break;
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                    bindForInOrForOfStatement(node);
-                    break;
-                case 203 /* IfStatement */:
-                    bindIfStatement(node);
-                    break;
-                case 211 /* ReturnStatement */:
-                case 215 /* ThrowStatement */:
-                    bindReturnOrThrow(node);
-                    break;
-                case 210 /* BreakStatement */:
-                case 209 /* ContinueStatement */:
-                    bindBreakOrContinueStatement(node);
-                    break;
-                case 216 /* TryStatement */:
-                    bindTryStatement(node);
-                    break;
-                case 213 /* SwitchStatement */:
-                    bindSwitchStatement(node);
-                    break;
-                case 227 /* CaseBlock */:
-                    bindCaseBlock(node);
-                    break;
-                case 214 /* LabeledStatement */:
-                    bindLabeledStatement(node);
-                    break;
-                case 185 /* PrefixUnaryExpression */:
-                    bindPrefixUnaryExpressionFlow(node);
-                    break;
-                case 187 /* BinaryExpression */:
-                    bindBinaryExpressionFlow(node);
-                    break;
-                case 181 /* DeleteExpression */:
-                    bindDeleteExpressionFlow(node);
-                    break;
-                case 188 /* ConditionalExpression */:
-                    bindConditionalExpressionFlow(node);
-                    break;
-                case 218 /* VariableDeclaration */:
-                    bindVariableDeclarationFlow(node);
-                    break;
-                default:
-                    ts.forEachChild(node, bind);
-                    break;
-            }
-        }
-        function isNarrowableReference(expr) {
-            return expr.kind === 69 /* Identifier */ ||
-                expr.kind === 97 /* ThisKeyword */ ||
-                expr.kind === 172 /* PropertyAccessExpression */ && isNarrowableReference(expr.expression);
-        }
-        function isNarrowingExpression(expr) {
-            switch (expr.kind) {
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                case 172 /* PropertyAccessExpression */:
-                    return isNarrowableReference(expr);
-                case 174 /* CallExpression */:
-                    return true;
-                case 178 /* ParenthesizedExpression */:
-                    return isNarrowingExpression(expr.expression);
-                case 187 /* BinaryExpression */:
-                    return isNarrowingBinaryExpression(expr);
-                case 185 /* PrefixUnaryExpression */:
-                    return expr.operator === 49 /* ExclamationToken */ && isNarrowingExpression(expr.operand);
-            }
-            return false;
-        }
-        function isNarrowingBinaryExpression(expr) {
-            switch (expr.operatorToken.kind) {
-                case 56 /* EqualsToken */:
-                    return isNarrowableReference(expr.left);
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                    if (isNarrowingExpression(expr.left) && (expr.right.kind === 93 /* NullKeyword */ || expr.right.kind === 69 /* Identifier */)) {
-                        return true;
-                    }
-                    if (expr.left.kind === 182 /* TypeOfExpression */ && isNarrowingExpression(expr.left.expression) && expr.right.kind === 9 /* StringLiteral */) {
-                        return true;
-                    }
-                    return false;
-                case 91 /* InstanceOfKeyword */:
-                    return isNarrowingExpression(expr.left);
-                case 24 /* CommaToken */:
-                    return isNarrowingExpression(expr.right);
-            }
-            return false;
-        }
-        function createBranchLabel() {
-            return {
-                flags: 4 /* BranchLabel */,
-                antecedents: undefined
-            };
-        }
-        function createLoopLabel() {
-            return {
-                flags: 8 /* LoopLabel */,
-                antecedents: undefined
-            };
-        }
-        function setFlowNodeReferenced(flow) {
-            // On first reference we set the Referenced flag, thereafter we set the Shared flag
-            flow.flags |= flow.flags & 128 /* Referenced */ ? 256 /* Shared */ : 128 /* Referenced */;
-        }
-        function addAntecedent(label, antecedent) {
-            if (!(antecedent.flags & 1 /* Unreachable */) && !ts.contains(label.antecedents, antecedent)) {
-                (label.antecedents || (label.antecedents = [])).push(antecedent);
-                setFlowNodeReferenced(antecedent);
-            }
-        }
-        function createFlowCondition(flags, antecedent, expression) {
-            if (antecedent.flags & 1 /* Unreachable */) {
-                return antecedent;
-            }
-            if (!expression) {
-                return flags & 32 /* TrueCondition */ ? antecedent : unreachableFlow;
-            }
-            if (expression.kind === 99 /* TrueKeyword */ && flags & 64 /* FalseCondition */ ||
-                expression.kind === 84 /* FalseKeyword */ && flags & 32 /* TrueCondition */) {
-                return unreachableFlow;
-            }
-            if (!isNarrowingExpression(expression)) {
-                return antecedent;
-            }
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: flags,
-                antecedent: antecedent,
-                expression: expression
-            };
-        }
-        function createFlowAssignment(antecedent, node) {
-            setFlowNodeReferenced(antecedent);
-            return {
-                flags: 16 /* Assignment */,
-                antecedent: antecedent,
-                node: node
-            };
-        }
-        function finishFlowLabel(flow) {
-            var antecedents = flow.antecedents;
-            if (!antecedents) {
-                return unreachableFlow;
-            }
-            if (antecedents.length === 1) {
-                return antecedents[0];
-            }
-            return flow;
-        }
-        function isStatementCondition(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 203 /* IfStatement */:
-                case 205 /* WhileStatement */:
-                case 204 /* DoStatement */:
-                    return parent.expression === node;
-                case 206 /* ForStatement */:
-                case 188 /* ConditionalExpression */:
-                    return parent.condition === node;
-            }
-            return false;
-        }
-        function isLogicalExpression(node) {
-            while (true) {
-                if (node.kind === 178 /* ParenthesizedExpression */) {
-                    node = node.expression;
-                }
-                else if (node.kind === 185 /* PrefixUnaryExpression */ && node.operator === 49 /* ExclamationToken */) {
-                    node = node.operand;
-                }
-                else {
-                    return node.kind === 187 /* BinaryExpression */ && (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */ ||
-                        node.operatorToken.kind === 52 /* BarBarToken */);
-                }
-            }
-        }
-        function isTopLevelLogicalExpression(node) {
-            while (node.parent.kind === 178 /* ParenthesizedExpression */ ||
-                node.parent.kind === 185 /* PrefixUnaryExpression */ &&
-                    node.parent.operator === 49 /* ExclamationToken */) {
-                node = node.parent;
-            }
-            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
-        }
-        function bindCondition(node, trueTarget, falseTarget) {
-            var saveTrueTarget = currentTrueTarget;
-            var saveFalseTarget = currentFalseTarget;
-            currentTrueTarget = trueTarget;
-            currentFalseTarget = falseTarget;
-            bind(node);
-            currentTrueTarget = saveTrueTarget;
-            currentFalseTarget = saveFalseTarget;
-            if (!node || !isLogicalExpression(node)) {
-                addAntecedent(trueTarget, createFlowCondition(32 /* TrueCondition */, currentFlow, node));
-                addAntecedent(falseTarget, createFlowCondition(64 /* FalseCondition */, currentFlow, node));
-            }
-        }
-        function bindIterativeStatement(node, breakTarget, continueTarget) {
-            var saveBreakTarget = currentBreakTarget;
-            var saveContinueTarget = currentContinueTarget;
-            currentBreakTarget = breakTarget;
-            currentContinueTarget = continueTarget;
-            bind(node);
-            currentBreakTarget = saveBreakTarget;
-            currentContinueTarget = saveContinueTarget;
-        }
-        function bindWhileStatement(node) {
-            var preWhileLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postWhileLabel = createBranchLabel();
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = preWhileLabel;
-            bindCondition(node.expression, preBodyLabel, postWhileLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
-            addAntecedent(preWhileLabel, currentFlow);
-            currentFlow = finishFlowLabel(postWhileLabel);
-        }
-        function bindDoStatement(node) {
-            var preDoLabel = createLoopLabel();
-            var preConditionLabel = createBranchLabel();
-            var postDoLabel = createBranchLabel();
-            addAntecedent(preDoLabel, currentFlow);
-            currentFlow = preDoLabel;
-            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
-            addAntecedent(preConditionLabel, currentFlow);
-            currentFlow = finishFlowLabel(preConditionLabel);
-            bindCondition(node.expression, preDoLabel, postDoLabel);
-            currentFlow = finishFlowLabel(postDoLabel);
-        }
-        function bindForStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var preBodyLabel = createBranchLabel();
-            var postLoopLabel = createBranchLabel();
-            bind(node.initializer);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bindCondition(node.condition, preBodyLabel, postLoopLabel);
-            currentFlow = finishFlowLabel(preBodyLabel);
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            bind(node.incrementor);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindForInOrForOfStatement(node) {
-            var preLoopLabel = createLoopLabel();
-            var postLoopLabel = createBranchLabel();
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = preLoopLabel;
-            bind(node.expression);
-            addAntecedent(postLoopLabel, currentFlow);
-            bind(node.initializer);
-            if (node.initializer.kind !== 219 /* VariableDeclarationList */) {
-                bindAssignmentTargetFlow(node.initializer);
-            }
-            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
-            addAntecedent(preLoopLabel, currentFlow);
-            currentFlow = finishFlowLabel(postLoopLabel);
-        }
-        function bindIfStatement(node) {
-            var thenLabel = createBranchLabel();
-            var elseLabel = createBranchLabel();
-            var postIfLabel = createBranchLabel();
-            bindCondition(node.expression, thenLabel, elseLabel);
-            currentFlow = finishFlowLabel(thenLabel);
-            bind(node.thenStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(elseLabel);
-            bind(node.elseStatement);
-            addAntecedent(postIfLabel, currentFlow);
-            currentFlow = finishFlowLabel(postIfLabel);
-        }
-        function bindReturnOrThrow(node) {
-            bind(node.expression);
-            if (node.kind === 211 /* ReturnStatement */) {
-                hasExplicitReturn = true;
-            }
-            currentFlow = unreachableFlow;
-        }
-        function findActiveLabel(name) {
-            if (activeLabels) {
-                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
-                    var label = activeLabels_1[_i];
-                    if (label.name === name) {
-                        return label;
-                    }
-                }
-            }
-            return undefined;
-        }
-        function bindbreakOrContinueFlow(node, breakTarget, continueTarget) {
-            var flowLabel = node.kind === 210 /* BreakStatement */ ? breakTarget : continueTarget;
-            if (flowLabel) {
-                addAntecedent(flowLabel, currentFlow);
-                currentFlow = unreachableFlow;
-            }
-        }
-        function bindBreakOrContinueStatement(node) {
-            bind(node.label);
-            if (node.label) {
-                var activeLabel = findActiveLabel(node.label.text);
-                if (activeLabel) {
-                    activeLabel.referenced = true;
-                    bindbreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
-                }
-            }
-            else {
-                bindbreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
-            }
-        }
-        function bindTryStatement(node) {
-            var postFinallyLabel = createBranchLabel();
-            var preTryFlow = currentFlow;
-            // TODO: Every statement in try block is potentially an exit point!
-            bind(node.tryBlock);
-            addAntecedent(postFinallyLabel, currentFlow);
-            if (node.catchClause) {
-                currentFlow = preTryFlow;
-                bind(node.catchClause);
-                addAntecedent(postFinallyLabel, currentFlow);
-            }
-            if (node.finallyBlock) {
-                currentFlow = preTryFlow;
-                bind(node.finallyBlock);
-            }
-            currentFlow = finishFlowLabel(postFinallyLabel);
-        }
-        function bindSwitchStatement(node) {
-            var postSwitchLabel = createBranchLabel();
-            bind(node.expression);
-            var saveBreakTarget = currentBreakTarget;
-            var savePreSwitchCaseFlow = preSwitchCaseFlow;
-            currentBreakTarget = postSwitchLabel;
-            preSwitchCaseFlow = currentFlow;
-            bind(node.caseBlock);
-            addAntecedent(postSwitchLabel, currentFlow);
-            var hasDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 250 /* DefaultClause */; });
-            if (!hasDefault) {
-                addAntecedent(postSwitchLabel, preSwitchCaseFlow);
-            }
-            currentBreakTarget = saveBreakTarget;
-            preSwitchCaseFlow = savePreSwitchCaseFlow;
-            currentFlow = finishFlowLabel(postSwitchLabel);
-        }
-        function bindCaseBlock(node) {
-            var clauses = node.clauses;
-            for (var i = 0; i < clauses.length; i++) {
-                var clause = clauses[i];
-                if (clause.statements.length) {
-                    if (currentFlow.flags & 1 /* Unreachable */) {
-                        currentFlow = preSwitchCaseFlow;
-                    }
-                    else {
-                        var preCaseLabel = createBranchLabel();
-                        addAntecedent(preCaseLabel, preSwitchCaseFlow);
-                        addAntecedent(preCaseLabel, currentFlow);
-                        currentFlow = finishFlowLabel(preCaseLabel);
-                    }
-                    bind(clause);
-                    if (!(currentFlow.flags & 1 /* Unreachable */) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
-                        errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
-                    }
-                }
-                else {
-                    bind(clause);
-                }
-            }
-        }
-        function pushActiveLabel(name, breakTarget, continueTarget) {
-            var activeLabel = {
-                name: name,
-                breakTarget: breakTarget,
-                continueTarget: continueTarget,
-                referenced: false
-            };
-            (activeLabels || (activeLabels = [])).push(activeLabel);
-            return activeLabel;
-        }
-        function popActiveLabel() {
-            activeLabels.pop();
-        }
-        function bindLabeledStatement(node) {
-            var preStatementLabel = createLoopLabel();
-            var postStatementLabel = createBranchLabel();
-            bind(node.label);
-            addAntecedent(preStatementLabel, currentFlow);
-            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
-            bind(node.statement);
-            popActiveLabel();
-            if (!activeLabel.referenced && !options.allowUnusedLabels) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
-            }
-            addAntecedent(postStatementLabel, currentFlow);
-            currentFlow = finishFlowLabel(postStatementLabel);
-        }
-        function bindDestructuringTargetFlow(node) {
-            if (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 56 /* EqualsToken */) {
-                bindAssignmentTargetFlow(node.left);
-            }
-            else {
-                bindAssignmentTargetFlow(node);
-            }
-        }
-        function bindAssignmentTargetFlow(node) {
-            if (isNarrowableReference(node)) {
-                currentFlow = createFlowAssignment(currentFlow, node);
-            }
-            else if (node.kind === 170 /* ArrayLiteralExpression */) {
-                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
-                    var e = _a[_i];
-                    if (e.kind === 191 /* SpreadElementExpression */) {
-                        bindAssignmentTargetFlow(e.expression);
-                    }
-                    else {
-                        bindDestructuringTargetFlow(e);
-                    }
-                }
-            }
-            else if (node.kind === 171 /* ObjectLiteralExpression */) {
-                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
-                    var p = _c[_b];
-                    if (p.kind === 253 /* PropertyAssignment */) {
-                        bindDestructuringTargetFlow(p.initializer);
-                    }
-                    else if (p.kind === 254 /* ShorthandPropertyAssignment */) {
-                        bindAssignmentTargetFlow(p.name);
-                    }
-                }
-            }
-        }
-        function bindLogicalExpression(node, trueTarget, falseTarget) {
-            var preRightLabel = createBranchLabel();
-            if (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */) {
-                bindCondition(node.left, preRightLabel, falseTarget);
-            }
-            else {
-                bindCondition(node.left, trueTarget, preRightLabel);
-            }
-            currentFlow = finishFlowLabel(preRightLabel);
-            bind(node.operatorToken);
-            bindCondition(node.right, trueTarget, falseTarget);
-        }
-        function bindPrefixUnaryExpressionFlow(node) {
-            if (node.operator === 49 /* ExclamationToken */) {
-                var saveTrueTarget = currentTrueTarget;
-                currentTrueTarget = currentFalseTarget;
-                currentFalseTarget = saveTrueTarget;
-                ts.forEachChild(node, bind);
-                currentFalseTarget = currentTrueTarget;
-                currentTrueTarget = saveTrueTarget;
-            }
-            else {
-                ts.forEachChild(node, bind);
-            }
-        }
-        function bindBinaryExpressionFlow(node) {
-            var operator = node.operatorToken.kind;
-            if (operator === 51 /* AmpersandAmpersandToken */ || operator === 52 /* BarBarToken */) {
-                if (isTopLevelLogicalExpression(node)) {
-                    var postExpressionLabel = createBranchLabel();
-                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
-                    currentFlow = finishFlowLabel(postExpressionLabel);
-                }
-                else {
-                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
-                }
-            }
-            else {
-                ts.forEachChild(node, bind);
-                if (operator === 56 /* EqualsToken */ && !ts.isAssignmentTarget(node)) {
-                    bindAssignmentTargetFlow(node.left);
-                }
-            }
-        }
-        function bindDeleteExpressionFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.expression.kind === 172 /* PropertyAccessExpression */) {
-                bindAssignmentTargetFlow(node.expression);
-            }
-        }
-        function bindConditionalExpressionFlow(node) {
-            var trueLabel = createBranchLabel();
-            var falseLabel = createBranchLabel();
-            var postExpressionLabel = createBranchLabel();
-            bindCondition(node.condition, trueLabel, falseLabel);
-            currentFlow = finishFlowLabel(trueLabel);
-            bind(node.whenTrue);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(falseLabel);
-            bind(node.whenFalse);
-            addAntecedent(postExpressionLabel, currentFlow);
-            currentFlow = finishFlowLabel(postExpressionLabel);
-        }
-        function bindInitializedVariableFlow(node) {
-            var name = node.name;
-            if (ts.isBindingPattern(name)) {
-                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
-                    var child = _a[_i];
-                    bindInitializedVariableFlow(child);
-                }
-            }
-            else {
-                currentFlow = createFlowAssignment(currentFlow, node);
-            }
-        }
-        function bindVariableDeclarationFlow(node) {
-            ts.forEachChild(node, bind);
-            if (node.initializer || node.parent.parent.kind === 207 /* ForInStatement */ || node.parent.parent.kind === 208 /* ForOfStatement */) {
-                bindInitializedVariableFlow(node);
-            }
-        }
-        function getContainerFlags(node) {
-            switch (node.kind) {
-                case 192 /* ClassExpression */:
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 171 /* ObjectLiteralExpression */:
-                case 159 /* TypeLiteral */:
-                case 265 /* JSDocRecordType */:
-                    return 1 /* IsContainer */;
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 220 /* FunctionDeclaration */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 156 /* FunctionType */:
-                case 269 /* JSDocFunctionType */:
-                case 157 /* ConstructorType */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                case 225 /* ModuleDeclaration */:
-                case 256 /* SourceFile */:
-                case 223 /* TypeAliasDeclaration */:
-                    return 5 /* IsContainerWithLocals */;
-                case 252 /* CatchClause */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                case 227 /* CaseBlock */:
-                    return 2 /* IsBlockScopedContainer */;
-                case 199 /* Block */:
-                    // do not treat blocks directly inside a function as a block-scoped-container.
-                    // Locals that reside in this block should go to the function locals. Otherwise 'x'
-                    // would not appear to be a redeclaration of a block scoped local in the following
-                    // example:
-                    //
-                    //      function foo() {
-                    //          var x;
-                    //          let x;
-                    //      }
-                    //
-                    // If we placed 'var x' into the function locals and 'let x' into the locals of
-                    // the block, then there would be no collision.
-                    //
-                    // By not creating a new block-scoped-container here, we ensure that both 'var x'
-                    // and 'let x' go into the Function-container's locals, and we do get a collision
-                    // conflict.
-                    return ts.isFunctionLike(node.parent) ? 0 /* None */ : 2 /* IsBlockScopedContainer */;
-            }
-            return 0 /* None */;
-        }
-        function addToContainerChain(next) {
-            if (lastContainer) {
-                lastContainer.nextContainer = next;
-            }
-            lastContainer = next;
-        }
-        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
-            // Just call this directly so that the return type of this function stays "void".
-            declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
-        }
-        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
-            switch (container.kind) {
-                // Modules, source files, and classes need specialized handling for how their
-                // members are declared (for example, a member of a class will go into a specific
-                // symbol table depending on if it is static or not). We defer to specialized
-                // handlers to take care of declaring these child members.
-                case 225 /* ModuleDeclaration */:
-                    return declareModuleMember(node, symbolFlags, symbolExcludes);
-                case 256 /* SourceFile */:
-                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
-                case 192 /* ClassExpression */:
-                case 221 /* ClassDeclaration */:
-                    return declareClassMember(node, symbolFlags, symbolExcludes);
-                case 224 /* EnumDeclaration */:
-                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
-                case 159 /* TypeLiteral */:
-                case 171 /* ObjectLiteralExpression */:
-                case 222 /* InterfaceDeclaration */:
-                case 265 /* JSDocRecordType */:
-                    // Interface/Object-types always have their children added to the 'members' of
-                    // their container. They are only accessible through an instance of their
-                    // container, and are never in scope otherwise (even inside the body of the
-                    // object / type / interface declaring them). An exception is type parameters,
-                    // which are in scope without qualification (similar to 'locals').
-                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                case 269 /* JSDocFunctionType */:
-                case 223 /* TypeAliasDeclaration */:
-                    // All the children of these container types are never visible through another
-                    // symbol (i.e. through another symbol's 'exports' or 'members').  Instead,
-                    // they're only accessed 'lexically' (i.e. from code that exists underneath
-                    // their container in the tree.  To accomplish this, we simply add their declared
-                    // symbol to the 'locals' of the container.  These symbols can then be found as
-                    // the type checker walks up the containers, checking them for matching names.
-                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
-            }
-        }
-        function declareClassMember(node, symbolFlags, symbolExcludes) {
-            return node.flags & 32 /* Static */
-                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
-                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
-        }
-        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
-            return ts.isExternalModule(file)
-                ? declareModuleMember(node, symbolFlags, symbolExcludes)
-                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
-        }
-        function hasExportDeclarations(node) {
-            var body = node.kind === 256 /* SourceFile */ ? node : node.body;
-            if (body.kind === 256 /* SourceFile */ || body.kind === 226 /* ModuleBlock */) {
-                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
-                    var stat = _a[_i];
-                    if (stat.kind === 236 /* ExportDeclaration */ || stat.kind === 235 /* ExportAssignment */) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function setExportContextFlag(node) {
-            // A declaration source file or ambient module declaration that contains no export declarations (but possibly regular
-            // declarations with export modifiers) is an export context in which declarations are implicitly exported.
-            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
-                node.flags |= 8192 /* ExportContext */;
-            }
-            else {
-                node.flags &= ~8192 /* ExportContext */;
-            }
-        }
-        function bindModuleDeclaration(node) {
-            setExportContextFlag(node);
-            if (ts.isAmbientModule(node)) {
-                if (node.flags & 1 /* Export */) {
-                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
-                }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    declareSymbolAndAddToSymbolTable(node, 1024 /* NamespaceModule */, 0 /* NamespaceModuleExcludes */);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
-                }
-            }
-            else {
-                var state = getModuleInstanceState(node);
-                if (state === 0 /* NonInstantiated */) {
-                    declareSymbolAndAddToSymbolTable(node, 1024 /* NamespaceModule */, 0 /* NamespaceModuleExcludes */);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
-                    if (node.symbol.flags & (16 /* Function */ | 32 /* Class */ | 256 /* RegularEnum */)) {
-                        // if module was already merged with some function, class or non-const enum
-                        // treat is a non-const-enum-only
-                        node.symbol.constEnumOnlyModule = false;
-                    }
-                    else {
-                        var currentModuleIsConstEnumOnly = state === 2 /* ConstEnumOnly */;
-                        if (node.symbol.constEnumOnlyModule === undefined) {
-                            // non-merged case - use the current state
-                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
-                        }
-                        else {
-                            // merged case: module is const enum only if all its pieces are non-instantiated or const enum
-                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
-                        }
-                    }
-                }
-            }
-        }
-        function bindFunctionOrConstructorType(node) {
-            // For a given function symbol "<...>(...) => T" we want to generate a symbol identical
-            // to the one we would get for: { <...>(...): T }
-            //
-            // We do that by making an anonymous type literal symbol, and then setting the function
-            // symbol as its sole member. To the rest of the system, this symbol will be  indistinguishable
-            // from an actual type literal symbol you would have gotten had you used the long form.
-            var symbol = createSymbol(131072 /* Signature */, getDeclarationName(node));
-            addDeclarationToSymbol(symbol, node, 131072 /* Signature */);
-            var typeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type");
-            addDeclarationToSymbol(typeLiteralSymbol, node, 2048 /* TypeLiteral */);
-            typeLiteralSymbol.members = (_a = {}, _a[symbol.name] = symbol, _a);
-            var _a;
-        }
-        function bindObjectLiteralExpression(node) {
-            var ElementKind;
-            (function (ElementKind) {
-                ElementKind[ElementKind["Property"] = 1] = "Property";
-                ElementKind[ElementKind["Accessor"] = 2] = "Accessor";
-            })(ElementKind || (ElementKind = {}));
-            if (inStrictMode) {
-                var seen = {};
-                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (prop.name.kind !== 69 /* Identifier */) {
-                        continue;
-                    }
-                    var identifier = prop.name;
-                    // ECMA-262 11.1.5 Object Initializer
-                    // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
-                    // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
-                    // IsDataDescriptor(propId.descriptor) is true.
-                    //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
-                    //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
-                    //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
-                    // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
-                    var currentKind = prop.kind === 253 /* PropertyAssignment */ || prop.kind === 254 /* ShorthandPropertyAssignment */ || prop.kind === 147 /* MethodDeclaration */
-                        ? 1 /* Property */
-                        : 2 /* Accessor */;
-                    var existingKind = seen[identifier.text];
-                    if (!existingKind) {
-                        seen[identifier.text] = currentKind;
-                        continue;
-                    }
-                    if (currentKind === 1 /* Property */ && existingKind === 1 /* Property */) {
-                        var span = ts.getErrorSpanForNode(file, identifier);
-                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
-                    }
-                }
-            }
-            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__object");
-        }
-        function bindAnonymousDeclaration(node, symbolFlags, name) {
-            var symbol = createSymbol(symbolFlags, name);
-            addDeclarationToSymbol(symbol, node, symbolFlags);
-        }
-        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
-            switch (blockScopeContainer.kind) {
-                case 225 /* ModuleDeclaration */:
-                    declareModuleMember(node, symbolFlags, symbolExcludes);
-                    break;
-                case 256 /* SourceFile */:
-                    if (ts.isExternalModule(container)) {
-                        declareModuleMember(node, symbolFlags, symbolExcludes);
-                        break;
-                    }
-                // fall through.
-                default:
-                    if (!blockScopeContainer.locals) {
-                        blockScopeContainer.locals = {};
-                        addToContainerChain(blockScopeContainer);
-                    }
-                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
-            }
-        }
-        function bindBlockScopedVariableDeclaration(node) {
-            bindBlockScopedDeclaration(node, 2 /* BlockScopedVariable */, 107455 /* BlockScopedVariableExcludes */);
-        }
-        // The binder visits every node in the syntax tree so it is a convenient place to perform a single localized
-        // check for reserved words used as identifiers in strict mode code.
-        function checkStrictModeIdentifier(node) {
-            if (inStrictMode &&
-                node.originalKeywordKind >= 106 /* FirstFutureReservedWord */ &&
-                node.originalKeywordKind <= 114 /* LastFutureReservedWord */ &&
-                !ts.isIdentifierName(node) &&
-                !ts.isInAmbientContext(node)) {
-                // Report error only if there are no parse errors in file
-                if (!file.parseDiagnostics.length) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
-                }
-            }
-        }
-        function getStrictModeIdentifierMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
-        }
-        function checkStrictModeBinaryExpression(node) {
-            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
-                // ECMA 262 (Annex C) The identifier eval or arguments may not appear as the LeftHandSideExpression of an
-                // Assignment operator(11.13) or of a PostfixExpression(11.3)
-                checkStrictModeEvalOrArguments(node, node.left);
-            }
-        }
-        function checkStrictModeCatchClause(node) {
-            // It is a SyntaxError if a TryStatement with a Catch occurs within strict code and the Identifier of the
-            // Catch production is eval or arguments
-            if (inStrictMode && node.variableDeclaration) {
-                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
-            }
-        }
-        function checkStrictModeDeleteExpression(node) {
-            // Grammar checking
-            if (inStrictMode && node.expression.kind === 69 /* Identifier */) {
-                // When a delete operator occurs within strict mode code, a SyntaxError is thrown if its
-                // UnaryExpression is a direct reference to a variable, function argument, or function name
-                var span = ts.getErrorSpanForNode(file, node.expression);
-                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
-            }
-        }
-        function isEvalOrArgumentsIdentifier(node) {
-            return node.kind === 69 /* Identifier */ &&
-                (node.text === "eval" || node.text === "arguments");
-        }
-        function checkStrictModeEvalOrArguments(contextNode, name) {
-            if (name && name.kind === 69 /* Identifier */) {
-                var identifier = name;
-                if (isEvalOrArgumentsIdentifier(identifier)) {
-                    // We check first if the name is inside class declaration or class expression; if so give explicit message
-                    // otherwise report generic error message.
-                    var span = ts.getErrorSpanForNode(file, name);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
-                }
-            }
-        }
-        function getStrictModeEvalOrArgumentsMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
-        }
-        function checkStrictModeFunctionName(node) {
-            if (inStrictMode) {
-                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a strict mode FunctionDeclaration or FunctionExpression (13.1))
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-        }
-        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
-            // Provide specialized messages to help the user understand why we think they're in
-            // strict mode.
-            if (ts.getContainingClass(node)) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
-            }
-            if (file.externalModuleIndicator) {
-                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
-            }
-            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
-        }
-        function checkStrictModeFunctionDeclaration(node) {
-            if (languageVersion < 2 /* ES6 */) {
-                // Report error if function is not top level function declaration
-                if (blockScopeContainer.kind !== 256 /* SourceFile */ &&
-                    blockScopeContainer.kind !== 225 /* ModuleDeclaration */ &&
-                    !ts.isFunctionLike(blockScopeContainer)) {
-                    // We check first if the name is inside class declaration or class expression; if so give explicit message
-                    // otherwise report generic error message.
-                    var errorSpan = ts.getErrorSpanForNode(file, node);
-                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
-                }
-            }
-        }
-        function checkStrictModeNumericLiteral(node) {
-            if (inStrictMode && node.isOctalLiteral) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
-            }
-        }
-        function checkStrictModePostfixUnaryExpression(node) {
-            // Grammar checking
-            // The identifier eval or arguments may not appear as the LeftHandSideExpression of an
-            // Assignment operator(11.13) or of a PostfixExpression(11.3) or as the UnaryExpression
-            // operated upon by a Prefix Increment(11.4.4) or a Prefix Decrement(11.4.5) operator.
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.operand);
-            }
-        }
-        function checkStrictModePrefixUnaryExpression(node) {
-            // Grammar checking
-            if (inStrictMode) {
-                if (node.operator === 41 /* PlusPlusToken */ || node.operator === 42 /* MinusMinusToken */) {
-                    checkStrictModeEvalOrArguments(node, node.operand);
-                }
-            }
-        }
-        function checkStrictModeWithStatement(node) {
-            // Grammar checking for withStatement
-            if (inStrictMode) {
-                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
-            }
-        }
-        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
-            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
-        }
-        function getDestructuringParameterName(node) {
-            return "__" + ts.indexOf(node.parent.parameters, node);
-        }
-        function bind(node) {
-            if (!node) {
-                return;
-            }
-            node.parent = parent;
-            var savedInStrictMode = inStrictMode;
-            if (!savedInStrictMode) {
-                updateStrictMode(node);
-            }
-            // First we bind declaration nodes to a symbol if possible.  We'll both create a symbol
-            // and then potentially add the symbol to an appropriate symbol table. Possible
-            // destination symbol tables are:
-            //
-            //  1) The 'exports' table of the current container's symbol.
-            //  2) The 'members' table of the current container's symbol.
-            //  3) The 'locals' table of the current container.
-            //
-            // However, not all symbols will end up in any of these tables.  'Anonymous' symbols
-            // (like TypeLiterals for example) will not be put in any table.
-            bindWorker(node);
-            // Then we recurse into the children of the node to bind them as well.  For certain
-            // symbols we do specialized work when we recurse.  For example, we'll keep track of
-            // the current 'container' node when it changes.  This helps us know which symbol table
-            // a local should go into for example.
-            bindChildren(node);
-            inStrictMode = savedInStrictMode;
-        }
-        function updateStrictMode(node) {
-            switch (node.kind) {
-                case 256 /* SourceFile */:
-                case 226 /* ModuleBlock */:
-                    updateStrictModeStatementList(node.statements);
-                    return;
-                case 199 /* Block */:
-                    if (ts.isFunctionLike(node.parent)) {
-                        updateStrictModeStatementList(node.statements);
-                    }
-                    return;
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
-                    // All classes are automatically in strict mode in ES6.
-                    inStrictMode = true;
-                    return;
-            }
-        }
-        function updateStrictModeStatementList(statements) {
-            for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
-                var statement = statements_1[_i];
-                if (!ts.isPrologueDirective(statement)) {
-                    return;
-                }
-                if (isUseStrictPrologueDirective(statement)) {
-                    inStrictMode = true;
-                    return;
-                }
-            }
-        }
-        /// Should be called only on prologue directives (isPrologueDirective(node) should be true)
-        function isUseStrictPrologueDirective(node) {
-            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
-            // Note: the node text must be exactly "use strict" or 'use strict'.  It is not ok for the
-            // string to contain unicode escapes (as per ES5).
-            return nodeText === '"use strict"' || nodeText === "'use strict'";
-        }
-        function bindWorker(node) {
-            switch (node.kind) {
-                /* Strict mode checks */
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                    if (currentFlow && (ts.isExpression(node) || parent.kind === 254 /* ShorthandPropertyAssignment */)) {
-                        node.flowNode = currentFlow;
-                    }
-                    return checkStrictModeIdentifier(node);
-                case 172 /* PropertyAccessExpression */:
-                    if (currentFlow && isNarrowableReference(node)) {
-                        node.flowNode = currentFlow;
-                    }
-                    break;
-                case 187 /* BinaryExpression */:
-                    if (ts.isInJavaScriptFile(node)) {
-                        var specialKind = ts.getSpecialPropertyAssignmentKind(node);
-                        switch (specialKind) {
-                            case 1 /* ExportsProperty */:
-                                bindExportsPropertyAssignment(node);
-                                break;
-                            case 2 /* ModuleExports */:
-                                bindModuleExportsAssignment(node);
-                                break;
-                            case 3 /* PrototypeProperty */:
-                                bindPrototypePropertyAssignment(node);
-                                break;
-                            case 4 /* ThisProperty */:
-                                bindThisPropertyAssignment(node);
-                                break;
-                            case 0 /* None */:
-                                // Nothing to do
-                                break;
-                            default:
-                                ts.Debug.fail("Unknown special property assignment kind");
-                        }
-                    }
-                    return checkStrictModeBinaryExpression(node);
-                case 252 /* CatchClause */:
-                    return checkStrictModeCatchClause(node);
-                case 181 /* DeleteExpression */:
-                    return checkStrictModeDeleteExpression(node);
-                case 8 /* NumericLiteral */:
-                    return checkStrictModeNumericLiteral(node);
-                case 186 /* PostfixUnaryExpression */:
-                    return checkStrictModePostfixUnaryExpression(node);
-                case 185 /* PrefixUnaryExpression */:
-                    return checkStrictModePrefixUnaryExpression(node);
-                case 212 /* WithStatement */:
-                    return checkStrictModeWithStatement(node);
-                case 165 /* ThisType */:
-                    seenThisKeyword = true;
-                    return;
-                case 154 /* TypePredicate */:
-                    return checkTypePredicate(node);
-                case 141 /* TypeParameter */:
-                    return declareSymbolAndAddToSymbolTable(node, 262144 /* TypeParameter */, 530912 /* TypeParameterExcludes */);
-                case 142 /* Parameter */:
-                    return bindParameter(node);
-                case 218 /* VariableDeclaration */:
-                case 169 /* BindingElement */:
-                    return bindVariableDeclarationOrBindingElement(node);
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 266 /* JSDocRecordMember */:
-                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
-                case 253 /* PropertyAssignment */:
-                case 254 /* ShorthandPropertyAssignment */:
-                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* PropertyExcludes */);
-                case 255 /* EnumMember */:
-                    return bindPropertyOrMethodOrAccessor(node, 8 /* EnumMember */, 107455 /* EnumMemberExcludes */);
-                case 247 /* JsxSpreadAttribute */:
-                    hasJsxSpreadAttribute = true;
-                    return;
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                case 153 /* IndexSignature */:
-                    return declareSymbolAndAddToSymbolTable(node, 131072 /* Signature */, 0 /* None */);
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    // If this is an ObjectLiteralExpression method, then it sits in the same space
-                    // as other properties in the object literal.  So we use SymbolFlags.PropertyExcludes
-                    // so that it will conflict with any other object literal members with the same
-                    // name.
-                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 0 /* PropertyExcludes */ : 99263 /* MethodExcludes */);
-                case 220 /* FunctionDeclaration */:
-                    return bindFunctionDeclaration(node);
-                case 148 /* Constructor */:
-                    return declareSymbolAndAddToSymbolTable(node, 16384 /* Constructor */, /*symbolExcludes:*/ 0 /* None */);
-                case 149 /* GetAccessor */:
-                    return bindPropertyOrMethodOrAccessor(node, 32768 /* GetAccessor */, 41919 /* GetAccessorExcludes */);
-                case 150 /* SetAccessor */:
-                    return bindPropertyOrMethodOrAccessor(node, 65536 /* SetAccessor */, 74687 /* SetAccessorExcludes */);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 269 /* JSDocFunctionType */:
-                    return bindFunctionOrConstructorType(node);
-                case 159 /* TypeLiteral */:
-                case 265 /* JSDocRecordType */:
-                    return bindAnonymousDeclaration(node, 2048 /* TypeLiteral */, "__type");
-                case 171 /* ObjectLiteralExpression */:
-                    return bindObjectLiteralExpression(node);
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return bindFunctionExpression(node);
-                case 174 /* CallExpression */:
-                    if (ts.isInJavaScriptFile(node)) {
-                        bindCallExpression(node);
-                    }
-                    break;
-                // Members of classes, interfaces, and modules
-                case 192 /* ClassExpression */:
-                case 221 /* ClassDeclaration */:
-                    return bindClassLikeDeclaration(node);
-                case 222 /* InterfaceDeclaration */:
-                    return bindBlockScopedDeclaration(node, 64 /* Interface */, 792960 /* InterfaceExcludes */);
-                case 223 /* TypeAliasDeclaration */:
-                    return bindBlockScopedDeclaration(node, 524288 /* TypeAlias */, 793056 /* TypeAliasExcludes */);
-                case 224 /* EnumDeclaration */:
-                    return bindEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
-                    return bindModuleDeclaration(node);
-                // Imports and exports
-                case 229 /* ImportEqualsDeclaration */:
-                case 232 /* NamespaceImport */:
-                case 234 /* ImportSpecifier */:
-                case 238 /* ExportSpecifier */:
-                    return declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
-                case 228 /* NamespaceExportDeclaration */:
-                    return bindNamespaceExportDeclaration(node);
-                case 231 /* ImportClause */:
-                    return bindImportClause(node);
-                case 236 /* ExportDeclaration */:
-                    return bindExportDeclaration(node);
-                case 235 /* ExportAssignment */:
-                    return bindExportAssignment(node);
-                case 256 /* SourceFile */:
-                    return bindSourceFileIfExternalModule();
-            }
-        }
-        function checkTypePredicate(node) {
-            var parameterName = node.parameterName, type = node.type;
-            if (parameterName && parameterName.kind === 69 /* Identifier */) {
-                checkStrictModeIdentifier(parameterName);
-            }
-            if (parameterName && parameterName.kind === 165 /* ThisType */) {
-                seenThisKeyword = true;
-            }
-            bind(type);
-        }
-        function bindSourceFileIfExternalModule() {
-            setExportContextFlag(file);
-            if (ts.isExternalModule(file)) {
-                bindSourceFileAsExternalModule();
-            }
-        }
-        function bindSourceFileAsExternalModule() {
-            bindAnonymousDeclaration(file, 512 /* ValueModule */, "\"" + ts.removeFileExtension(file.fileName) + "\"");
-        }
-        function bindExportAssignment(node) {
-            var boundExpression = node.kind === 235 /* ExportAssignment */ ? node.expression : node.right;
-            if (!container.symbol || !container.symbol.exports) {
-                // Export assignment in some sort of block construct
-                bindAnonymousDeclaration(node, 8388608 /* Alias */, getDeclarationName(node));
-            }
-            else if (boundExpression.kind === 69 /* Identifier */ && node.kind === 235 /* ExportAssignment */) {
-                // An export default clause with an identifier exports all meanings of that identifier
-                declareSymbol(container.symbol.exports, container.symbol, node, 8388608 /* Alias */, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
-            }
-            else {
-                // An export default clause with an expression exports a value
-                declareSymbol(container.symbol.exports, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
-            }
-        }
-        function bindNamespaceExportDeclaration(node) {
-            if (node.modifiers && node.modifiers.length) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
-            }
-            if (node.parent.kind !== 256 /* SourceFile */) {
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
-                return;
-            }
-            else {
-                var parent_5 = node.parent;
-                if (!ts.isExternalModule(parent_5)) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
-                    return;
-                }
-                if (!parent_5.isDeclarationFile) {
-                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
-                    return;
-                }
-            }
-            file.symbol.globalExports = file.symbol.globalExports || {};
-            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
-        }
-        function bindExportDeclaration(node) {
-            if (!container.symbol || !container.symbol.exports) {
-                // Export * in some sort of block construct
-                bindAnonymousDeclaration(node, 1073741824 /* ExportStar */, getDeclarationName(node));
-            }
-            else if (!node.exportClause) {
-                // All export * declarations are collected in an __export symbol
-                declareSymbol(container.symbol.exports, container.symbol, node, 1073741824 /* ExportStar */, 0 /* None */);
-            }
-        }
-        function bindImportClause(node) {
-            if (node.name) {
-                declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
-            }
-        }
-        function setCommonJsModuleIndicator(node) {
-            if (!file.commonJsModuleIndicator) {
-                file.commonJsModuleIndicator = node;
-                bindSourceFileAsExternalModule();
-            }
-        }
-        function bindExportsPropertyAssignment(node) {
-            // When we create a property via 'exports.foo = bar', the 'exports.foo' property access
-            // expression is the declaration
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 /* Property */ | 7340032 /* Export */, 0 /* None */);
-        }
-        function bindModuleExportsAssignment(node) {
-            // 'module.exports = expr' assignment
-            setCommonJsModuleIndicator(node);
-            declareSymbol(file.symbol.exports, file.symbol, node, 4 /* Property */ | 7340032 /* Export */ | 512 /* ValueModule */, 0 /* None */);
-        }
-        function bindThisPropertyAssignment(node) {
-            // Declare a 'member' in case it turns out the container was an ES5 class
-            if (container.kind === 179 /* FunctionExpression */ || container.kind === 220 /* FunctionDeclaration */) {
-                container.symbol.members = container.symbol.members || {};
-                // It's acceptable for multiple 'this' assignments of the same identifier to occur
-                declareSymbol(container.symbol.members, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ & ~4 /* Property */);
-            }
-        }
-        function bindPrototypePropertyAssignment(node) {
-            // We saw a node of the form 'x.prototype.y = z'. Declare a 'member' y on x if x was a function.
-            // Look up the function in the local scope, since prototype assignments should
-            // follow the function declaration
-            var leftSideOfAssignment = node.left;
-            var classPrototype = leftSideOfAssignment.expression;
-            var constructorFunction = classPrototype.expression;
-            // Fix up parent pointers since we're going to use these nodes before we bind into them
-            leftSideOfAssignment.parent = node;
-            constructorFunction.parent = classPrototype;
-            classPrototype.parent = leftSideOfAssignment;
-            var funcSymbol = container.locals[constructorFunction.text];
-            if (!funcSymbol || !(funcSymbol.flags & 16 /* Function */)) {
-                return;
-            }
-            // Set up the members collection if it doesn't exist already
-            if (!funcSymbol.members) {
-                funcSymbol.members = {};
-            }
-            // Declare the method/property
-            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4 /* Property */, 0 /* PropertyExcludes */);
-        }
-        function bindCallExpression(node) {
-            // We're only inspecting call expressions to detect CommonJS modules, so we can skip
-            // this check if we've already seen the module indicator
-            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ false)) {
-                setCommonJsModuleIndicator(node);
-            }
-        }
-        function bindClassLikeDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.getClassExtendsHeritageClauseElement(node) !== undefined) {
-                    hasClassExtends = true;
-                }
-                if (ts.nodeIsDecorated(node)) {
-                    hasDecorators = true;
-                }
-            }
-            if (node.kind === 221 /* ClassDeclaration */) {
-                bindBlockScopedDeclaration(node, 32 /* Class */, 899519 /* ClassExcludes */);
-            }
-            else {
-                var bindingName = node.name ? node.name.text : "__class";
-                bindAnonymousDeclaration(node, 32 /* Class */, bindingName);
-                // Add name of class expression into the map for semantic classifier
-                if (node.name) {
-                    classifiableNames[node.name.text] = node.name.text;
-                }
-            }
-            var symbol = node.symbol;
-            // TypeScript 1.0 spec (April 2014): 8.4
-            // Every class automatically contains a static property member named 'prototype', the
-            // type of which is an instantiation of the class type with type Any supplied as a type
-            // argument for each type parameter. It is an error to explicitly declare a static
-            // property member with the name 'prototype'.
-            //
-            // Note: we check for this here because this class may be merging into a module.  The
-            // module might have an exported variable called 'prototype'.  We can't allow that as
-            // that would clash with the built-in 'prototype' for the class.
-            var prototypeSymbol = createSymbol(4 /* Property */ | 134217728 /* Prototype */, "prototype");
-            if (ts.hasProperty(symbol.exports, prototypeSymbol.name)) {
-                if (node.name) {
-                    node.name.parent = node;
-                }
-                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
-            }
-            symbol.exports[prototypeSymbol.name] = prototypeSymbol;
-            prototypeSymbol.parent = symbol;
-        }
-        function bindEnumDeclaration(node) {
-            return ts.isConst(node)
-                ? bindBlockScopedDeclaration(node, 128 /* ConstEnum */, 899967 /* ConstEnumExcludes */)
-                : bindBlockScopedDeclaration(node, 256 /* RegularEnum */, 899327 /* RegularEnumExcludes */);
-        }
-        function bindVariableDeclarationOrBindingElement(node) {
-            if (inStrictMode) {
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-            if (!ts.isBindingPattern(node.name)) {
-                if (ts.isBlockOrCatchScoped(node)) {
-                    bindBlockScopedVariableDeclaration(node);
-                }
-                else if (ts.isParameterDeclaration(node)) {
-                    // It is safe to walk up parent chain to find whether the node is a destructing parameter declaration
-                    // because its parent chain has already been set up, since parents are set before descending into children.
-                    //
-                    // If node is a binding element in parameter declaration, we need to use ParameterExcludes.
-                    // Using ParameterExcludes flag allows the compiler to report an error on duplicate identifiers in Parameter Declaration
-                    // For example:
-                    //      function foo([a,a]) {} // Duplicate Identifier error
-                    //      function bar(a,a) {}   // Duplicate Identifier error, parameter declaration in this case is handled in bindParameter
-                    //                             // which correctly set excluded symbols
-                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
-                }
-                else {
-                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107454 /* FunctionScopedVariableExcludes */);
-                }
-            }
-        }
-        function bindParameter(node) {
-            if (!ts.isDeclarationFile(file) &&
-                !ts.isInAmbientContext(node) &&
-                ts.nodeIsDecorated(node)) {
-                hasDecorators = true;
-                hasParameterDecorators = true;
-            }
-            if (inStrictMode) {
-                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a
-                // strict mode FunctionLikeDeclaration or FunctionExpression(13.1)
-                checkStrictModeEvalOrArguments(node, node.name);
-            }
-            if (ts.isBindingPattern(node.name)) {
-                bindAnonymousDeclaration(node, 1 /* FunctionScopedVariable */, getDestructuringParameterName(node));
-            }
-            else {
-                declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
-            }
-            // If this is a property-parameter, then also declare the property symbol into the
-            // containing class.
-            if (ts.isParameterPropertyDeclaration(node)) {
-                var classDeclaration = node.parent.parent;
-                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */);
-            }
-        }
-        function bindFunctionDeclaration(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-            }
-            checkStrictModeFunctionName(node);
-            if (inStrictMode) {
-                checkStrictModeFunctionDeclaration(node);
-                return bindBlockScopedDeclaration(node, 16 /* Function */, 106927 /* FunctionExcludes */);
-            }
-            else {
-                return declareSymbolAndAddToSymbolTable(node, 16 /* Function */, 106927 /* FunctionExcludes */);
-            }
-        }
-        function bindFunctionExpression(node) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-            }
-            checkStrictModeFunctionName(node);
-            var bindingName = node.name ? node.name.text : "__function";
-            return bindAnonymousDeclaration(node, 16 /* Function */, bindingName);
-        }
-        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
-            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    hasAsyncFunctions = true;
-                }
-                if (ts.nodeIsDecorated(node)) {
-                    hasDecorators = true;
-                }
-            }
-            return ts.hasDynamicName(node)
-                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
-                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
-        }
-        // reachability checks
-        function shouldReportErrorOnModuleDeclaration(node) {
-            var instanceState = getModuleInstanceState(node);
-            return instanceState === 1 /* Instantiated */ || (instanceState === 2 /* ConstEnumOnly */ && options.preserveConstEnums);
-        }
-        function checkUnreachable(node) {
-            if (!(currentFlow.flags & 1 /* Unreachable */)) {
-                return false;
-            }
-            if (currentFlow === unreachableFlow) {
-                var reportError = 
-                // report error on all statements except empty ones
-                (ts.isStatement(node) && node.kind !== 201 /* EmptyStatement */) ||
-                    // report error on class declarations
-                    node.kind === 221 /* ClassDeclaration */ ||
-                    // report error on instantiated modules or const-enums only modules if preserveConstEnums is set
-                    (node.kind === 225 /* ModuleDeclaration */ && shouldReportErrorOnModuleDeclaration(node)) ||
-                    // report error on regular enums and const enums if preserveConstEnums is set
-                    (node.kind === 224 /* EnumDeclaration */ && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
-                if (reportError) {
-                    currentFlow = reportedUnreachableFlow;
-                    // unreachable code is reported if
-                    // - user has explicitly asked about it AND
-                    // - statement is in not ambient context (statements in ambient context is already an error
-                    //   so we should not report extras) AND
-                    //   - node is not variable statement OR
-                    //   - node is block scoped variable statement OR
-                    //   - node is not block scoped variable statement and at least one variable declaration has initializer
-                    //   Rationale: we don't want to report errors on non-initialized var's since they are hoisted
-                    //   On the other side we do want to report errors on non-initialized 'lets' because of TDZ
-                    var reportUnreachableCode = !options.allowUnreachableCode &&
-                        !ts.isInAmbientContext(node) &&
-                        (node.kind !== 200 /* VariableStatement */ ||
-                            ts.getCombinedNodeFlags(node.declarationList) & 3072 /* BlockScoped */ ||
-                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
-                    if (reportUnreachableCode) {
-                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
-                    }
-                }
-            }
-            return true;
-        }
-    }
-})(ts || (ts = {}));
-/// <reference path="binder.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var nextSymbolId = 1;
-    var nextNodeId = 1;
-    var nextMergeId = 1;
-    var nextFlowId = 1;
-    function getNodeId(node) {
-        if (!node.id) {
-            node.id = nextNodeId;
-            nextNodeId++;
-        }
-        return node.id;
-    }
-    ts.getNodeId = getNodeId;
-    ts.checkTime = 0;
-    function getSymbolId(symbol) {
-        if (!symbol.id) {
-            symbol.id = nextSymbolId;
-            nextSymbolId++;
-        }
-        return symbol.id;
-    }
-    ts.getSymbolId = getSymbolId;
-    function createTypeChecker(host, produceDiagnostics) {
-        // Cancellation that controls whether or not we can cancel in the middle of type checking.
-        // In general cancelling is *not* safe for the type checker.  We might be in the middle of
-        // computing something, and we will leave our internals in an inconsistent state.  Callers
-        // who set the cancellation token should catch if a cancellation exception occurs, and
-        // should throw away and create a new TypeChecker.
-        //
-        // Currently we only support setting the cancellation token when getting diagnostics.  This
-        // is because diagnostics can be quite expensive, and we want to allow hosts to bail out if
-        // they no longer need the information (for example, if the user started editing again).
-        var cancellationToken;
-        var Symbol = ts.objectAllocator.getSymbolConstructor();
-        var Type = ts.objectAllocator.getTypeConstructor();
-        var Signature = ts.objectAllocator.getSignatureConstructor();
-        var typeCount = 0;
-        var symbolCount = 0;
-        var emptyArray = [];
-        var emptySymbols = {};
-        var compilerOptions = host.getCompilerOptions();
-        var languageVersion = compilerOptions.target || 0 /* ES3 */;
-        var modulekind = ts.getEmitModuleKind(compilerOptions);
-        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
-        var strictNullChecks = compilerOptions.strictNullChecks;
-        var emitResolver = createResolver();
-        var undefinedSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "undefined");
-        undefinedSymbol.declarations = [];
-        var argumentsSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "arguments");
-        var checker = {
-            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
-            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
-            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
-            getTypeCount: function () { return typeCount; },
-            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
-            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
-            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
-            getDiagnostics: getDiagnostics,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getTypeOfSymbolAtLocation: getTypeOfSymbolAtLocation,
-            getSymbolsOfParameterPropertyDeclaration: getSymbolsOfParameterPropertyDeclaration,
-            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
-            getPropertiesOfType: getPropertiesOfType,
-            getPropertyOfType: getPropertyOfType,
-            getSignaturesOfType: getSignaturesOfType,
-            getIndexTypeOfType: getIndexTypeOfType,
-            getBaseTypes: getBaseTypes,
-            getReturnTypeOfSignature: getReturnTypeOfSignature,
-            getNonNullableType: getNonNullableType,
-            getSymbolsInScope: getSymbolsInScope,
-            getSymbolAtLocation: getSymbolAtLocation,
-            getShorthandAssignmentValueSymbol: getShorthandAssignmentValueSymbol,
-            getExportSpecifierLocalTargetSymbol: getExportSpecifierLocalTargetSymbol,
-            getTypeAtLocation: getTypeOfNode,
-            getPropertySymbolOfDestructuringAssignment: getPropertySymbolOfDestructuringAssignment,
-            typeToString: typeToString,
-            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
-            symbolToString: symbolToString,
-            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
-            getRootSymbols: getRootSymbols,
-            getContextualType: getContextualType,
-            getFullyQualifiedName: getFullyQualifiedName,
-            getResolvedSignature: getResolvedSignature,
-            getConstantValue: getConstantValue,
-            isValidPropertyAccess: isValidPropertyAccess,
-            getSignatureFromDeclaration: getSignatureFromDeclaration,
-            isImplementationOfOverload: isImplementationOfOverload,
-            getAliasedSymbol: resolveAlias,
-            getEmitResolver: getEmitResolver,
-            getExportsOfModule: getExportsOfModuleAsArray,
-            getJsxElementAttributesType: getJsxElementAttributesType,
-            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
-            isOptionalParameter: isOptionalParameter
-        };
-        var unknownSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "unknown");
-        var resolvingSymbol = createSymbol(67108864 /* Transient */, "__resolving__");
-        var nullableWideningFlags = strictNullChecks ? 0 : 2097152 /* ContainsUndefinedOrNull */;
-        var anyType = createIntrinsicType(1 /* Any */, "any");
-        var stringType = createIntrinsicType(2 /* String */, "string");
-        var numberType = createIntrinsicType(4 /* Number */, "number");
-        var booleanType = createIntrinsicType(8 /* Boolean */, "boolean");
-        var esSymbolType = createIntrinsicType(16777216 /* ESSymbol */, "symbol");
-        var voidType = createIntrinsicType(16 /* Void */, "void");
-        var undefinedType = createIntrinsicType(32 /* Undefined */ | nullableWideningFlags, "undefined");
-        var nullType = createIntrinsicType(64 /* Null */ | nullableWideningFlags, "null");
-        var emptyArrayElementType = createIntrinsicType(32 /* Undefined */ | 2097152 /* ContainsUndefinedOrNull */, "undefined");
-        var unknownType = createIntrinsicType(1 /* Any */, "unknown");
-        var neverType = createIntrinsicType(134217728 /* Never */, "never");
-        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        emptyGenericType.instantiations = {};
-        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        // The anyFunctionType contains the anyFunctionType by definition. The flag is further propagated
-        // in getPropagatingFlagsOfTypes, and it is checked in inferFromTypes.
-        anyFunctionType.flags |= 8388608 /* ContainsAnyFunctionType */;
-        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
-        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasStringLiterals*/ false);
-        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasStringLiterals*/ false);
-        var enumNumberIndexInfo = createIndexInfo(stringType, /*isReadonly*/ true);
-        var globals = {};
-        var getGlobalESSymbolConstructorSymbol;
-        var getGlobalPromiseConstructorSymbol;
-        var globalObjectType;
-        var globalFunctionType;
-        var globalArrayType;
-        var globalReadonlyArrayType;
-        var globalStringType;
-        var globalNumberType;
-        var globalBooleanType;
-        var globalRegExpType;
-        var anyArrayType;
-        var anyReadonlyArrayType;
-        // The library files are only loaded when the feature is used.
-        // This allows users to just specify library files they want to used through --lib
-        // and they will not get an error from not having unrelated library files
-        var getGlobalTemplateStringsArrayType;
-        var getGlobalESSymbolType;
-        var getGlobalIterableType;
-        var getGlobalIteratorType;
-        var getGlobalIterableIteratorType;
-        var getGlobalClassDecoratorType;
-        var getGlobalParameterDecoratorType;
-        var getGlobalPropertyDecoratorType;
-        var getGlobalMethodDecoratorType;
-        var getGlobalTypedPropertyDescriptorType;
-        var getGlobalPromiseType;
-        var tryGetGlobalPromiseType;
-        var getGlobalPromiseLikeType;
-        var getInstantiatedGlobalPromiseLikeType;
-        var getGlobalPromiseConstructorLikeType;
-        var getGlobalThenableType;
-        var jsxElementClassType;
-        var deferredNodes;
-        var flowLoopStart = 0;
-        var flowLoopCount = 0;
-        var visitedFlowCount = 0;
-        var tupleTypes = {};
-        var unionTypes = {};
-        var intersectionTypes = {};
-        var stringLiteralTypes = {};
-        var resolutionTargets = [];
-        var resolutionResults = [];
-        var resolutionPropertyNames = [];
-        var mergedSymbols = [];
-        var symbolLinks = [];
-        var nodeLinks = [];
-        var flowLoopCaches = [];
-        var flowLoopNodes = [];
-        var flowLoopKeys = [];
-        var flowLoopTypes = [];
-        var visitedFlowNodes = [];
-        var visitedFlowTypes = [];
-        var potentialThisCollisions = [];
-        var awaitedTypeStack = [];
-        var diagnostics = ts.createDiagnosticCollection();
-        var TypeFacts;
-        (function (TypeFacts) {
-            TypeFacts[TypeFacts["None"] = 0] = "None";
-            TypeFacts[TypeFacts["TypeofEQString"] = 1] = "TypeofEQString";
-            TypeFacts[TypeFacts["TypeofEQNumber"] = 2] = "TypeofEQNumber";
-            TypeFacts[TypeFacts["TypeofEQBoolean"] = 4] = "TypeofEQBoolean";
-            TypeFacts[TypeFacts["TypeofEQSymbol"] = 8] = "TypeofEQSymbol";
-            TypeFacts[TypeFacts["TypeofEQObject"] = 16] = "TypeofEQObject";
-            TypeFacts[TypeFacts["TypeofEQFunction"] = 32] = "TypeofEQFunction";
-            TypeFacts[TypeFacts["TypeofEQHostObject"] = 64] = "TypeofEQHostObject";
-            TypeFacts[TypeFacts["TypeofNEString"] = 128] = "TypeofNEString";
-            TypeFacts[TypeFacts["TypeofNENumber"] = 256] = "TypeofNENumber";
-            TypeFacts[TypeFacts["TypeofNEBoolean"] = 512] = "TypeofNEBoolean";
-            TypeFacts[TypeFacts["TypeofNESymbol"] = 1024] = "TypeofNESymbol";
-            TypeFacts[TypeFacts["TypeofNEObject"] = 2048] = "TypeofNEObject";
-            TypeFacts[TypeFacts["TypeofNEFunction"] = 4096] = "TypeofNEFunction";
-            TypeFacts[TypeFacts["TypeofNEHostObject"] = 8192] = "TypeofNEHostObject";
-            TypeFacts[TypeFacts["EQUndefined"] = 16384] = "EQUndefined";
-            TypeFacts[TypeFacts["EQNull"] = 32768] = "EQNull";
-            TypeFacts[TypeFacts["EQUndefinedOrNull"] = 65536] = "EQUndefinedOrNull";
-            TypeFacts[TypeFacts["NEUndefined"] = 131072] = "NEUndefined";
-            TypeFacts[TypeFacts["NENull"] = 262144] = "NENull";
-            TypeFacts[TypeFacts["NEUndefinedOrNull"] = 524288] = "NEUndefinedOrNull";
-            TypeFacts[TypeFacts["Truthy"] = 1048576] = "Truthy";
-            TypeFacts[TypeFacts["Falsy"] = 2097152] = "Falsy";
-            TypeFacts[TypeFacts["All"] = 4194303] = "All";
-            // The following members encode facts about particular kinds of types for use in the getTypeFacts function.
-            // The presence of a particular fact means that the given test is true for some (and possibly all) values
-            // of that kind of type.
-            TypeFacts[TypeFacts["StringStrictFacts"] = 4079361] = "StringStrictFacts";
-            TypeFacts[TypeFacts["StringFacts"] = 4194049] = "StringFacts";
-            TypeFacts[TypeFacts["NumberStrictFacts"] = 4079234] = "NumberStrictFacts";
-            TypeFacts[TypeFacts["NumberFacts"] = 4193922] = "NumberFacts";
-            TypeFacts[TypeFacts["BooleanStrictFacts"] = 4078980] = "BooleanStrictFacts";
-            TypeFacts[TypeFacts["BooleanFacts"] = 4193668] = "BooleanFacts";
-            TypeFacts[TypeFacts["SymbolStrictFacts"] = 1981320] = "SymbolStrictFacts";
-            TypeFacts[TypeFacts["SymbolFacts"] = 4193160] = "SymbolFacts";
-            TypeFacts[TypeFacts["ObjectStrictFacts"] = 1972176] = "ObjectStrictFacts";
-            TypeFacts[TypeFacts["ObjectFacts"] = 4184016] = "ObjectFacts";
-            TypeFacts[TypeFacts["FunctionStrictFacts"] = 1970144] = "FunctionStrictFacts";
-            TypeFacts[TypeFacts["FunctionFacts"] = 4181984] = "FunctionFacts";
-            TypeFacts[TypeFacts["UndefinedFacts"] = 2457472] = "UndefinedFacts";
-            TypeFacts[TypeFacts["NullFacts"] = 2340752] = "NullFacts";
-        })(TypeFacts || (TypeFacts = {}));
-        var typeofEQFacts = {
-            "string": 1 /* TypeofEQString */,
-            "number": 2 /* TypeofEQNumber */,
-            "boolean": 4 /* TypeofEQBoolean */,
-            "symbol": 8 /* TypeofEQSymbol */,
-            "undefined": 16384 /* EQUndefined */,
-            "object": 16 /* TypeofEQObject */,
-            "function": 32 /* TypeofEQFunction */
-        };
-        var typeofNEFacts = {
-            "string": 128 /* TypeofNEString */,
-            "number": 256 /* TypeofNENumber */,
-            "boolean": 512 /* TypeofNEBoolean */,
-            "symbol": 1024 /* TypeofNESymbol */,
-            "undefined": 131072 /* NEUndefined */,
-            "object": 2048 /* TypeofNEObject */,
-            "function": 4096 /* TypeofNEFunction */
-        };
-        var typeofTypesByName = {
-            "string": stringType,
-            "number": numberType,
-            "boolean": booleanType,
-            "symbol": esSymbolType,
-            "undefined": undefinedType
-        };
-        var jsxElementType;
-        /** Things we lazy load from the JSX namespace */
-        var jsxTypes = {};
-        var JsxNames = {
-            JSX: "JSX",
-            IntrinsicElements: "IntrinsicElements",
-            ElementClass: "ElementClass",
-            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
-            Element: "Element",
-            IntrinsicAttributes: "IntrinsicAttributes",
-            IntrinsicClassAttributes: "IntrinsicClassAttributes"
-        };
-        var subtypeRelation = {};
-        var assignableRelation = {};
-        var comparableRelation = {};
-        var identityRelation = {};
-        // This is for caching the result of getSymbolDisplayBuilder. Do not access directly.
-        var _displayBuilder;
-        var TypeSystemPropertyName;
-        (function (TypeSystemPropertyName) {
-            TypeSystemPropertyName[TypeSystemPropertyName["Type"] = 0] = "Type";
-            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedBaseConstructorType"] = 1] = "ResolvedBaseConstructorType";
-            TypeSystemPropertyName[TypeSystemPropertyName["DeclaredType"] = 2] = "DeclaredType";
-            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedReturnType"] = 3] = "ResolvedReturnType";
-        })(TypeSystemPropertyName || (TypeSystemPropertyName = {}));
-        var builtinGlobals = (_a = {},
-            _a[undefinedSymbol.name] = undefinedSymbol,
-            _a
-        );
-        initializeTypeChecker();
-        return checker;
-        function getEmitResolver(sourceFile, cancellationToken) {
-            // Ensure we have all the type information in place for this file so that all the
-            // emitter questions of this resolver will return the right information.
-            getDiagnostics(sourceFile, cancellationToken);
-            return emitResolver;
-        }
-        function error(location, message, arg0, arg1, arg2) {
-            var diagnostic = location
-                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
-                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
-            diagnostics.add(diagnostic);
-        }
-        function createSymbol(flags, name) {
-            symbolCount++;
-            return new Symbol(flags, name);
-        }
-        function getExcludedSymbolFlags(flags) {
-            var result = 0;
-            if (flags & 2 /* BlockScopedVariable */)
-                result |= 107455 /* BlockScopedVariableExcludes */;
-            if (flags & 1 /* FunctionScopedVariable */)
-                result |= 107454 /* FunctionScopedVariableExcludes */;
-            if (flags & 4 /* Property */)
-                result |= 0 /* PropertyExcludes */;
-            if (flags & 8 /* EnumMember */)
-                result |= 107455 /* EnumMemberExcludes */;
-            if (flags & 16 /* Function */)
-                result |= 106927 /* FunctionExcludes */;
-            if (flags & 32 /* Class */)
-                result |= 899519 /* ClassExcludes */;
-            if (flags & 64 /* Interface */)
-                result |= 792960 /* InterfaceExcludes */;
-            if (flags & 256 /* RegularEnum */)
-                result |= 899327 /* RegularEnumExcludes */;
-            if (flags & 128 /* ConstEnum */)
-                result |= 899967 /* ConstEnumExcludes */;
-            if (flags & 512 /* ValueModule */)
-                result |= 106639 /* ValueModuleExcludes */;
-            if (flags & 8192 /* Method */)
-                result |= 99263 /* MethodExcludes */;
-            if (flags & 32768 /* GetAccessor */)
-                result |= 41919 /* GetAccessorExcludes */;
-            if (flags & 65536 /* SetAccessor */)
-                result |= 74687 /* SetAccessorExcludes */;
-            if (flags & 262144 /* TypeParameter */)
-                result |= 530912 /* TypeParameterExcludes */;
-            if (flags & 524288 /* TypeAlias */)
-                result |= 793056 /* TypeAliasExcludes */;
-            if (flags & 8388608 /* Alias */)
-                result |= 8388608 /* AliasExcludes */;
-            return result;
-        }
-        function recordMergedSymbol(target, source) {
-            if (!source.mergeId) {
-                source.mergeId = nextMergeId;
-                nextMergeId++;
-            }
-            mergedSymbols[source.mergeId] = target;
-        }
-        function cloneSymbol(symbol) {
-            var result = createSymbol(symbol.flags | 33554432 /* Merged */, symbol.name);
-            result.declarations = symbol.declarations.slice(0);
-            result.parent = symbol.parent;
-            if (symbol.valueDeclaration)
-                result.valueDeclaration = symbol.valueDeclaration;
-            if (symbol.constEnumOnlyModule)
-                result.constEnumOnlyModule = true;
-            if (symbol.members)
-                result.members = cloneSymbolTable(symbol.members);
-            if (symbol.exports)
-                result.exports = cloneSymbolTable(symbol.exports);
-            recordMergedSymbol(result, symbol);
-            return result;
-        }
-        function mergeSymbol(target, source) {
-            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
-                if (source.flags & 512 /* ValueModule */ && target.flags & 512 /* ValueModule */ && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
-                    // reset flag when merging instantiated module into value module that has only const enums
-                    target.constEnumOnlyModule = false;
-                }
-                target.flags |= source.flags;
-                if (source.valueDeclaration &&
-                    (!target.valueDeclaration ||
-                        (target.valueDeclaration.kind === 225 /* ModuleDeclaration */ && source.valueDeclaration.kind !== 225 /* ModuleDeclaration */))) {
-                    // other kinds of value declarations take precedence over modules
-                    target.valueDeclaration = source.valueDeclaration;
-                }
-                ts.forEach(source.declarations, function (node) {
-                    target.declarations.push(node);
-                });
-                if (source.members) {
-                    if (!target.members)
-                        target.members = {};
-                    mergeSymbolTable(target.members, source.members);
-                }
-                if (source.exports) {
-                    if (!target.exports)
-                        target.exports = {};
-                    mergeSymbolTable(target.exports, source.exports);
-                }
-                recordMergedSymbol(target, source);
-            }
-            else {
-                var message_2 = target.flags & 2 /* BlockScopedVariable */ || source.flags & 2 /* BlockScopedVariable */
-                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
-                ts.forEach(source.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
-                ts.forEach(target.declarations, function (node) {
-                    error(node.name ? node.name : node, message_2, symbolToString(source));
-                });
-            }
-        }
-        function cloneSymbolTable(symbolTable) {
-            var result = {};
-            for (var id in symbolTable) {
-                if (ts.hasProperty(symbolTable, id)) {
-                    result[id] = symbolTable[id];
-                }
-            }
-            return result;
-        }
-        function mergeSymbolTable(target, source) {
-            for (var id in source) {
-                if (ts.hasProperty(source, id)) {
-                    if (!ts.hasProperty(target, id)) {
-                        target[id] = source[id];
-                    }
-                    else {
-                        var symbol = target[id];
-                        if (!(symbol.flags & 33554432 /* Merged */)) {
-                            target[id] = symbol = cloneSymbol(symbol);
-                        }
-                        mergeSymbol(symbol, source[id]);
-                    }
-                }
-            }
-        }
-        function mergeModuleAugmentation(moduleName) {
-            var moduleAugmentation = moduleName.parent;
-            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
-                // this is a combined symbol for multiple augmentations within the same file.
-                // its symbol already has accumulated information for all declarations
-                // so we need to add it just once - do the work only for first declaration
-                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
-                return;
-            }
-            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
-                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
-            }
-            else {
-                // find a module that about to be augmented
-                // do not validate names of augmentations that are defined in ambient context
-                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
-                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
-                    : undefined;
-                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError);
-                if (!mainModule) {
-                    return;
-                }
-                // obtain item referenced by 'export='
-                mainModule = resolveExternalModuleSymbol(mainModule);
-                if (mainModule.flags & 1536 /* Namespace */) {
-                    // if module symbol has already been merged - it is safe to use it.
-                    // otherwise clone it
-                    mainModule = mainModule.flags & 33554432 /* Merged */ ? mainModule : cloneSymbol(mainModule);
-                    mergeSymbol(mainModule, moduleAugmentation.symbol);
-                }
-                else {
-                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
-                }
-            }
-        }
-        function addToSymbolTable(target, source, message) {
-            for (var id in source) {
-                if (ts.hasProperty(source, id)) {
-                    if (ts.hasProperty(target, id)) {
-                        // Error on redeclarations
-                        ts.forEach(target[id].declarations, addDeclarationDiagnostic(id, message));
-                    }
-                    else {
-                        target[id] = source[id];
-                    }
-                }
-            }
-            function addDeclarationDiagnostic(id, message) {
-                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
-            }
-        }
-        function getSymbolLinks(symbol) {
-            if (symbol.flags & 67108864 /* Transient */)
-                return symbol;
-            var id = getSymbolId(symbol);
-            return symbolLinks[id] || (symbolLinks[id] = {});
-        }
-        function getNodeLinks(node) {
-            var nodeId = getNodeId(node);
-            return nodeLinks[nodeId] || (nodeLinks[nodeId] = {});
-        }
-        function isGlobalSourceFile(node) {
-            return node.kind === 256 /* SourceFile */ && !ts.isExternalOrCommonJsModule(node);
-        }
-        function getSymbol(symbols, name, meaning) {
-            if (meaning && ts.hasProperty(symbols, name)) {
-                var symbol = symbols[name];
-                ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
-                if (symbol.flags & meaning) {
-                    return symbol;
-                }
-                if (symbol.flags & 8388608 /* Alias */) {
-                    var target = resolveAlias(symbol);
-                    // Unknown symbol means an error occurred in alias resolution, treat it as positive answer to avoid cascading errors
-                    if (target === unknownSymbol || target.flags & meaning) {
-                        return symbol;
-                    }
-                }
-            }
-            // return undefined if we can't find a symbol.
-        }
-        /**
-         * Get symbols that represent parameter-property-declaration as parameter and as property declaration
-         * @param parameter a parameterDeclaration node
-         * @param parameterName a name of the parameter to get the symbols for.
-         * @return a tuple of two symbols
-         */
-        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
-            var constructorDeclaration = parameter.parent;
-            var classDeclaration = parameter.parent.parent;
-            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455 /* Value */);
-            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455 /* Value */);
-            if (parameterSymbol && propertySymbol) {
-                return [parameterSymbol, propertySymbol];
-            }
-            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
-        }
-        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
-            var declarationFile = ts.getSourceFileOfNode(declaration);
-            var useFile = ts.getSourceFileOfNode(usage);
-            if (declarationFile !== useFile) {
-                if (modulekind || (!compilerOptions.outFile && !compilerOptions.out)) {
-                    // nodes are in different files and order cannot be determines
-                    return true;
-                }
-                var sourceFiles = host.getSourceFiles();
-                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
-            }
-            if (declaration.pos <= usage.pos) {
-                // declaration is before usage
-                // still might be illegal if usage is in the initializer of the variable declaration
-                return declaration.kind !== 218 /* VariableDeclaration */ ||
-                    !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
-            }
-            // declaration is after usage
-            // can be legal if usage is deferred (i.e. inside function or in initializer of instance property)
-            return isUsedInFunctionOrNonStaticProperty(declaration, usage);
-            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                switch (declaration.parent.parent.kind) {
-                    case 200 /* VariableStatement */:
-                    case 206 /* ForStatement */:
-                    case 208 /* ForOfStatement */:
-                        // variable statement/for/for-of statement case,
-                        // use site should not be inside variable declaration (initializer of declaration or binding element)
-                        if (isSameScopeDescendentOf(usage, declaration, container)) {
-                            return true;
-                        }
-                        break;
-                }
-                switch (declaration.parent.parent.kind) {
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                        // ForIn/ForOf case - use site should not be used in expression part
-                        if (isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container)) {
-                            return true;
-                        }
-                }
-                return false;
-            }
-            function isUsedInFunctionOrNonStaticProperty(declaration, usage) {
-                var container = ts.getEnclosingBlockScopeContainer(declaration);
-                var current = usage;
-                while (current) {
-                    if (current === container) {
-                        return false;
-                    }
-                    if (ts.isFunctionLike(current)) {
-                        return true;
-                    }
-                    var initializerOfNonStaticProperty = current.parent &&
-                        current.parent.kind === 145 /* PropertyDeclaration */ &&
-                        (current.parent.flags & 32 /* Static */) === 0 &&
-                        current.parent.initializer === current;
-                    if (initializerOfNonStaticProperty) {
-                        return true;
-                    }
-                    current = current.parent;
-                }
-                return false;
-            }
-        }
-        // Resolve a given name for a given meaning at a given location. An error is reported if the name was not found and
-        // the nameNotFoundMessage argument is not undefined. Returns the resolved symbol, or undefined if no symbol with
-        // the given name can be found.
-        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg) {
-            var result;
-            var lastLocation;
-            var propertyWithInvalidInitializer;
-            var errorLocation = location;
-            var grandparent;
-            var isInExternalModule = false;
-            loop: while (location) {
-                // Locals of a source file are not in scope (because they get merged into the global symbol table)
-                if (location.locals && !isGlobalSourceFile(location)) {
-                    if (result = getSymbol(location.locals, name, meaning)) {
-                        var useResult = true;
-                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
-                            // symbol lookup restrictions for function-like declarations
-                            // - Type parameters of a function are in scope in the entire function declaration, including the parameter
-                            //   list and return type. However, local types are only in scope in the function body.
-                            // - parameters are only in the scope of function body
-                            // This restriction does not apply to JSDoc comment types because they are parented
-                            // at a higher level than type parameters would normally be
-                            if (meaning & result.flags & 793056 /* Type */ && lastLocation.kind !== 273 /* JSDocComment */) {
-                                useResult = result.flags & 262144 /* TypeParameter */
-                                    ? lastLocation === location.type ||
-                                        lastLocation.kind === 142 /* Parameter */ ||
-                                        lastLocation.kind === 141 /* TypeParameter */
-                                    : false;
-                            }
-                            if (meaning & 107455 /* Value */ && result.flags & 1 /* FunctionScopedVariable */) {
-                                // parameters are visible only inside function body, parameter list and return type
-                                // technically for parameter list case here we might mix parameters and variables declared in function,
-                                // however it is detected separately when checking initializers of parameters
-                                // to make sure that they reference no variables declared after them.
-                                useResult =
-                                    lastLocation.kind === 142 /* Parameter */ ||
-                                        (lastLocation === location.type &&
-                                            result.valueDeclaration.kind === 142 /* Parameter */);
-                            }
-                        }
-                        if (useResult) {
-                            break loop;
-                        }
-                        else {
-                            result = undefined;
-                        }
-                    }
-                }
-                switch (location.kind) {
-                    case 256 /* SourceFile */:
-                        if (!ts.isExternalOrCommonJsModule(location))
-                            break;
-                        isInExternalModule = true;
-                    case 225 /* ModuleDeclaration */:
-                        var moduleExports = getSymbolOfNode(location).exports;
-                        if (location.kind === 256 /* SourceFile */ || ts.isAmbientModule(location)) {
-                            // It's an external module. First see if the module has an export default and if the local
-                            // name of that export default matches.
-                            if (result = moduleExports["default"]) {
-                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
-                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
-                                    break loop;
-                                }
-                                result = undefined;
-                            }
-                            // Because of module/namespace merging, a module's exports are in scope,
-                            // yet we never want to treat an export specifier as putting a member in scope.
-                            // Therefore, if the name we find is purely an export specifier, it is not actually considered in scope.
-                            // Two things to note about this:
-                            //     1. We have to check this without calling getSymbol. The problem with calling getSymbol
-                            //        on an export specifier is that it might find the export specifier itself, and try to
-                            //        resolve it as an alias. This will cause the checker to consider the export specifier
-                            //        a circular alias reference when it might not be.
-                            //     2. We check === SymbolFlags.Alias in order to check that the symbol is *purely*
-                            //        an alias. If we used &, we'd be throwing out symbols that have non alias aspects,
-                            //        which is not the desired behavior.
-                            if (ts.hasProperty(moduleExports, name) &&
-                                moduleExports[name].flags === 8388608 /* Alias */ &&
-                                ts.getDeclarationOfKind(moduleExports[name], 238 /* ExportSpecifier */)) {
-                                break;
-                            }
-                        }
-                        if (result = getSymbol(moduleExports, name, meaning & 8914931 /* ModuleMember */)) {
-                            break loop;
-                        }
-                        break;
-                    case 224 /* EnumDeclaration */:
-                        if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & 8 /* EnumMember */)) {
-                            break loop;
-                        }
-                        break;
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                        // TypeScript 1.0 spec (April 2014): 8.4.1
-                        // Initializer expressions for instance member variables are evaluated in the scope
-                        // of the class constructor body but are not permitted to reference parameters or
-                        // local variables of the constructor. This effectively means that entities from outer scopes
-                        // by the same name as a constructor parameter or local variable are inaccessible
-                        // in initializer expressions for instance member variables.
-                        if (ts.isClassLike(location.parent) && !(location.flags & 32 /* Static */)) {
-                            var ctor = findConstructorDeclaration(location.parent);
-                            if (ctor && ctor.locals) {
-                                if (getSymbol(ctor.locals, name, meaning & 107455 /* Value */)) {
-                                    // Remember the property node, it will be used later to report appropriate error
-                                    propertyWithInvalidInitializer = location;
-                                }
-                            }
-                        }
-                        break;
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                        if (result = getSymbol(getSymbolOfNode(location).members, name, meaning & 793056 /* Type */)) {
-                            if (lastLocation && lastLocation.flags & 32 /* Static */) {
-                                // TypeScript 1.0 spec (April 2014): 3.4.1
-                                // The scope of a type parameter extends over the entire declaration with which the type
-                                // parameter list is associated, with the exception of static member declarations in classes.
-                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
-                                return undefined;
-                            }
-                            break loop;
-                        }
-                        if (location.kind === 192 /* ClassExpression */ && meaning & 32 /* Class */) {
-                            var className = location.name;
-                            if (className && name === className.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    // It is not legal to reference a class's own type parameters from a computed property name that
-                    // belongs to the class. For example:
-                    //
-                    //   function foo<T>() { return '' }
-                    //   class C<T> { // <-- Class's own type parameter T
-                    //       [foo<T>()]() { } // <-- Reference to T from class's own computed property
-                    //   }
-                    //
-                    case 140 /* ComputedPropertyName */:
-                        grandparent = location.parent.parent;
-                        if (ts.isClassLike(grandparent) || grandparent.kind === 222 /* InterfaceDeclaration */) {
-                            // A reference to this grandparent's type parameters would be an error
-                            if (result = getSymbol(getSymbolOfNode(grandparent).members, name, meaning & 793056 /* Type */)) {
-                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
-                                return undefined;
-                            }
-                        }
-                        break;
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 220 /* FunctionDeclaration */:
-                    case 180 /* ArrowFunction */:
-                        if (meaning & 3 /* Variable */ && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        break;
-                    case 179 /* FunctionExpression */:
-                        if (meaning & 3 /* Variable */ && name === "arguments") {
-                            result = argumentsSymbol;
-                            break loop;
-                        }
-                        if (meaning & 16 /* Function */) {
-                            var functionName = location.name;
-                            if (functionName && name === functionName.text) {
-                                result = location.symbol;
-                                break loop;
-                            }
-                        }
-                        break;
-                    case 143 /* Decorator */:
-                        // Decorators are resolved at the class declaration. Resolving at the parameter
-                        // or member would result in looking up locals in the method.
-                        //
-                        //   function y() {}
-                        //   class C {
-                        //       method(@y x, y) {} // <-- decorator y should be resolved at the class declaration, not the parameter.
-                        //   }
-                        //
-                        if (location.parent && location.parent.kind === 142 /* Parameter */) {
-                            location = location.parent;
-                        }
-                        //
-                        //   function y() {}
-                        //   class C {
-                        //       @y method(x, y) {} // <-- decorator y should be resolved at the class declaration, not the method.
-                        //   }
-                        //
-                        if (location.parent && ts.isClassElement(location.parent)) {
-                            location = location.parent;
-                        }
-                        break;
-                }
-                lastLocation = location;
-                location = location.parent;
-            }
-            if (!result) {
-                result = getSymbol(globals, name, meaning);
-            }
-            if (!result) {
-                if (nameNotFoundMessage) {
-                    if (!checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg)) {
-                        error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    }
-                }
-                return undefined;
-            }
-            // Perform extra checks only if error reporting was requested
-            if (nameNotFoundMessage) {
-                if (propertyWithInvalidInitializer) {
-                    // We have a match, but the reference occurred within a property initializer and the identifier also binds
-                    // to a local variable in the constructor where the code will be emitted.
-                    var propertyName = propertyWithInvalidInitializer.name;
-                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                    return undefined;
-                }
-                // Only check for block-scoped variable if we are looking for the
-                // name with variable meaning
-                //      For example,
-                //          declare module foo {
-                //              interface bar {}
-                //          }
-                //      const foo/*1*/: foo/*2*/.bar;
-                // The foo at /*1*/ and /*2*/ will share same symbol with two meaning
-                // block - scope variable and namespace module. However, only when we
-                // try to resolve name in /*1*/ which is used in variable position,
-                // we want to check for block- scoped
-                if (meaning & 2 /* BlockScopedVariable */) {
-                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
-                    if (exportOrLocalSymbol.flags & 2 /* BlockScopedVariable */) {
-                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
-                    }
-                }
-                // If we're in an external module, we can't reference symbols created from UMD export declarations
-                if (result && isInExternalModule) {
-                    var decls = result.declarations;
-                    if (decls && decls.length === 1 && decls[0].kind === 228 /* NamespaceExportDeclaration */) {
-                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
-                    }
-                }
-            }
-            return result;
-        }
-        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
-            if (!errorLocation || (errorLocation.kind === 69 /* Identifier */ && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
-                return false;
-            }
-            var container = ts.getThisContainer(errorLocation, /* includeArrowFunctions */ true);
-            var location = container;
-            while (location) {
-                if (ts.isClassLike(location.parent)) {
-                    var classSymbol = getSymbolOfNode(location.parent);
-                    if (!classSymbol) {
-                        break;
-                    }
-                    // Check to see if a static member exists.
-                    var constructorType = getTypeOfSymbol(classSymbol);
-                    if (getPropertyOfType(constructorType, name)) {
-                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
-                        return true;
-                    }
-                    // No static member is present.
-                    // Check if we're in an instance method and look for a relevant instance member.
-                    if (location === container && !(location.flags & 32 /* Static */)) {
-                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
-                        if (getPropertyOfType(instanceType, name)) {
-                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
-                            return true;
-                        }
-                    }
-                }
-                location = location.parent;
-            }
-            return false;
-        }
-        function checkResolvedBlockScopedVariable(result, errorLocation) {
-            ts.Debug.assert((result.flags & 2 /* BlockScopedVariable */) !== 0);
-            // Block-scoped variables cannot be used before their definition
-            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) ? d : undefined; });
-            ts.Debug.assert(declaration !== undefined, "Block-scoped variable declaration is undefined");
-            if (!isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 218 /* VariableDeclaration */), errorLocation)) {
-                error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
-            }
-        }
-        /* Starting from 'initial' node walk up the parent chain until 'stopAt' node is reached.
-         * If at any point current node is equal to 'parent' node - return true.
-         * Return false if 'stopAt' node is reached or isFunctionLike(current) === true.
-         */
-        function isSameScopeDescendentOf(initial, parent, stopAt) {
-            if (!parent) {
-                return false;
-            }
-            for (var current = initial; current && current !== stopAt && !ts.isFunctionLike(current); current = current.parent) {
-                if (current === parent) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function getAnyImportSyntax(node) {
-            if (ts.isAliasSymbolDeclaration(node)) {
-                if (node.kind === 229 /* ImportEqualsDeclaration */) {
-                    return node;
-                }
-                while (node && node.kind !== 230 /* ImportDeclaration */) {
-                    node = node.parent;
-                }
-                return node;
-            }
-        }
-        function getDeclarationOfAliasSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isAliasSymbolDeclaration(d) ? d : undefined; });
-        }
-        function getTargetOfImportEqualsDeclaration(node) {
-            if (node.moduleReference.kind === 240 /* ExternalModuleReference */) {
-                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
-            }
-            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, node);
-        }
-        function getTargetOfImportClause(node) {
-            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
-            if (moduleSymbol) {
-                var exportDefaultSymbol = moduleSymbol.exports["export="] ?
-                    getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
-                    resolveSymbol(moduleSymbol.exports["default"]);
-                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
-                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
-                }
-                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
-                    return resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
-                }
-                return exportDefaultSymbol;
-            }
-        }
-        function getTargetOfNamespaceImport(node) {
-            var moduleSpecifier = node.parent.parent.moduleSpecifier;
-            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier);
-        }
-        // This function creates a synthetic symbol that combines the value side of one symbol with the
-        // type/namespace side of another symbol. Consider this example:
-        //
-        //   declare module graphics {
-        //       interface Point {
-        //           x: number;
-        //           y: number;
-        //       }
-        //   }
-        //   declare var graphics: {
-        //       Point: new (x: number, y: number) => graphics.Point;
-        //   }
-        //   declare module "graphics" {
-        //       export = graphics;
-        //   }
-        //
-        // An 'import { Point } from "graphics"' needs to create a symbol that combines the value side 'Point'
-        // property with the type/namespace side interface 'Point'.
-        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
-            if (valueSymbol.flags & (793056 /* Type */ | 1536 /* Namespace */)) {
-                return valueSymbol;
-            }
-            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
-            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
-            result.parent = valueSymbol.parent || typeSymbol.parent;
-            if (valueSymbol.valueDeclaration)
-                result.valueDeclaration = valueSymbol.valueDeclaration;
-            if (typeSymbol.members)
-                result.members = typeSymbol.members;
-            if (valueSymbol.exports)
-                result.exports = valueSymbol.exports;
-            return result;
-        }
-        function getExportOfModule(symbol, name) {
-            if (symbol.flags & 1536 /* Module */) {
-                var exports = getExportsOfSymbol(symbol);
-                if (ts.hasProperty(exports, name)) {
-                    return resolveSymbol(exports[name]);
-                }
-            }
-        }
-        function getPropertyOfVariable(symbol, name) {
-            if (symbol.flags & 3 /* Variable */) {
-                var typeAnnotation = symbol.valueDeclaration.type;
-                if (typeAnnotation) {
-                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
-                }
-            }
-        }
-        function getExternalModuleMember(node, specifier) {
-            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier);
-            if (targetSymbol) {
-                var name_9 = specifier.propertyName || specifier.name;
-                if (name_9.text) {
-                    var symbolFromVariable = void 0;
-                    // First check if module was specified with "export=". If so, get the member from the resolved type
-                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
-                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_9.text);
-                    }
-                    else {
-                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_9.text);
-                    }
-                    // if symbolFromVariable is export - get its final target
-                    symbolFromVariable = resolveSymbol(symbolFromVariable);
-                    var symbolFromModule = getExportOfModule(targetSymbol, name_9.text);
-                    var symbol = symbolFromModule && symbolFromVariable ?
-                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
-                        symbolFromModule || symbolFromVariable;
-                    if (!symbol) {
-                        error(name_9, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_9));
-                    }
-                    return symbol;
-                }
-            }
-        }
-        function getTargetOfImportSpecifier(node) {
-            return getExternalModuleMember(node.parent.parent.parent, node);
-        }
-        function getTargetOfGlobalModuleExportDeclaration(node) {
-            return resolveExternalModuleSymbol(node.parent.symbol);
-        }
-        function getTargetOfExportSpecifier(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */);
-        }
-        function getTargetOfExportAssignment(node) {
-            return resolveEntityName(node.expression, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */);
-        }
-        function getTargetOfAliasDeclaration(node) {
-            switch (node.kind) {
-                case 229 /* ImportEqualsDeclaration */:
-                    return getTargetOfImportEqualsDeclaration(node);
-                case 231 /* ImportClause */:
-                    return getTargetOfImportClause(node);
-                case 232 /* NamespaceImport */:
-                    return getTargetOfNamespaceImport(node);
-                case 234 /* ImportSpecifier */:
-                    return getTargetOfImportSpecifier(node);
-                case 238 /* ExportSpecifier */:
-                    return getTargetOfExportSpecifier(node);
-                case 235 /* ExportAssignment */:
-                    return getTargetOfExportAssignment(node);
-                case 228 /* NamespaceExportDeclaration */:
-                    return getTargetOfGlobalModuleExportDeclaration(node);
-            }
-        }
-        function resolveSymbol(symbol) {
-            return symbol && symbol.flags & 8388608 /* Alias */ && !(symbol.flags & (107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */)) ? resolveAlias(symbol) : symbol;
-        }
-        function resolveAlias(symbol) {
-            ts.Debug.assert((symbol.flags & 8388608 /* Alias */) !== 0, "Should only get Alias here.");
-            var links = getSymbolLinks(symbol);
-            if (!links.target) {
-                links.target = resolvingSymbol;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                var target = getTargetOfAliasDeclaration(node);
-                if (links.target === resolvingSymbol) {
-                    links.target = target || unknownSymbol;
-                }
-                else {
-                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
-                }
-            }
-            else if (links.target === resolvingSymbol) {
-                links.target = unknownSymbol;
-            }
-            return links.target;
-        }
-        function markExportAsReferenced(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target) {
-                var markAlias = target === unknownSymbol ||
-                    ((target.flags & 107455 /* Value */) && !isConstEnumOrConstEnumOnlyModule(target));
-                if (markAlias) {
-                    markAliasSymbolAsReferenced(symbol);
-                }
-            }
-        }
-        // When an alias symbol is referenced, we need to mark the entity it references as referenced and in turn repeat that until
-        // we reach a non-alias or an exported entity (which is always considered referenced). We do this by checking the target of
-        // the alias as an expression (which recursively takes us back here if the target references another alias).
-        function markAliasSymbolAsReferenced(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.referenced) {
-                links.referenced = true;
-                var node = getDeclarationOfAliasSymbol(symbol);
-                if (node.kind === 235 /* ExportAssignment */) {
-                    // export default <symbol>
-                    checkExpressionCached(node.expression);
-                }
-                else if (node.kind === 238 /* ExportSpecifier */) {
-                    // export { <symbol> } or export { <symbol> as foo }
-                    checkExpressionCached(node.propertyName || node.name);
-                }
-                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    // import foo = <symbol>
-                    checkExpressionCached(node.moduleReference);
-                }
-            }
-        }
-        // This function is only for imports with entity names
-        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importDeclaration) {
-            if (!importDeclaration) {
-                importDeclaration = ts.getAncestor(entityName, 229 /* ImportEqualsDeclaration */);
-                ts.Debug.assert(importDeclaration !== undefined);
-            }
-            // There are three things we might try to look for. In the following examples,
-            // the search term is enclosed in |...|:
-            //
-            //     import a = |b|; // Namespace
-            //     import a = |b.c|; // Value, type, namespace
-            //     import a = |b.c|.d; // Namespace
-            if (entityName.kind === 69 /* Identifier */ && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
-            }
-            // Check for case 1 and 3 in the above example
-            if (entityName.kind === 69 /* Identifier */ || entityName.parent.kind === 139 /* QualifiedName */) {
-                return resolveEntityName(entityName, 1536 /* Namespace */);
-            }
-            else {
-                // Case 2 in above example
-                // entityName.kind could be a QualifiedName or a Missing identifier
-                ts.Debug.assert(entityName.parent.kind === 229 /* ImportEqualsDeclaration */);
-                return resolveEntityName(entityName, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */);
-            }
-        }
-        function getFullyQualifiedName(symbol) {
-            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
-        }
-        // Resolves a qualified name and any involved aliases
-        function resolveEntityName(name, meaning, ignoreErrors) {
-            if (ts.nodeIsMissing(name)) {
-                return undefined;
-            }
-            var symbol;
-            if (name.kind === 69 /* Identifier */) {
-                var message = meaning === 1536 /* Namespace */ ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
-                symbol = resolveName(name, name.text, meaning, ignoreErrors ? undefined : message, name);
-                if (!symbol) {
-                    return undefined;
-                }
-            }
-            else if (name.kind === 139 /* QualifiedName */ || name.kind === 172 /* PropertyAccessExpression */) {
-                var left = name.kind === 139 /* QualifiedName */ ? name.left : name.expression;
-                var right = name.kind === 139 /* QualifiedName */ ? name.right : name.name;
-                var namespace = resolveEntityName(left, 1536 /* Namespace */, ignoreErrors);
-                if (!namespace || namespace === unknownSymbol || ts.nodeIsMissing(right)) {
-                    return undefined;
-                }
-                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
-                if (!symbol) {
-                    if (!ignoreErrors) {
-                        error(right, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
-                    }
-                    return undefined;
-                }
-            }
-            else {
-                ts.Debug.fail("Unknown entity name kind.");
-            }
-            ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
-            return symbol.flags & meaning ? symbol : resolveAlias(symbol);
-        }
-        function resolveExternalModuleName(location, moduleReferenceExpression) {
-            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
-        }
-        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError) {
-            if (moduleReferenceExpression.kind !== 9 /* StringLiteral */) {
-                return;
-            }
-            var moduleReferenceLiteral = moduleReferenceExpression;
-            // Module names are escaped in our symbol table.  However, string literal values aren't.
-            // Escape the name in the "require(...)" clause to ensure we find the right symbol.
-            var moduleName = ts.escapeIdentifier(moduleReferenceLiteral.text);
-            if (moduleName === undefined) {
-                return;
-            }
-            var isRelative = ts.isExternalModuleNameRelative(moduleName);
-            if (!isRelative) {
-                var symbol = getSymbol(globals, '"' + moduleName + '"', 512 /* ValueModule */);
-                if (symbol) {
-                    // merged symbol is module declaration symbol combined with all augmentations
-                    return getMergedSymbol(symbol);
-                }
-            }
-            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReferenceLiteral.text);
-            var sourceFile = resolvedModule && host.getSourceFile(resolvedModule.resolvedFileName);
-            if (sourceFile) {
-                if (sourceFile.symbol) {
-                    // merged symbol is module declaration symbol combined with all augmentations
-                    return getMergedSymbol(sourceFile.symbol);
-                }
-                if (moduleNotFoundError) {
-                    // report errors only if it was requested
-                    error(moduleReferenceLiteral, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
-                }
-                return undefined;
-            }
-            if (moduleNotFoundError) {
-                // report errors only if it was requested
-                error(moduleReferenceLiteral, moduleNotFoundError, moduleName);
-            }
-            return undefined;
-        }
-        // An external module with an 'export =' declaration resolves to the target of the 'export =' declaration,
-        // and an external module with no 'export =' declaration resolves to the module itself.
-        function resolveExternalModuleSymbol(moduleSymbol) {
-            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports["export="])) || moduleSymbol;
-        }
-        // An external module with an 'export =' declaration may be referenced as an ES6 module provided the 'export ='
-        // references a symbol that is at least declared as a module or a variable. The target of the 'export =' may
-        // combine other declarations with the module or variable (e.g. a class/module, function/module, interface/variable).
-        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression) {
-            var symbol = resolveExternalModuleSymbol(moduleSymbol);
-            if (symbol && !(symbol.flags & (1536 /* Module */ | 3 /* Variable */))) {
-                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
-                symbol = undefined;
-            }
-            return symbol;
-        }
-        function hasExportAssignmentSymbol(moduleSymbol) {
-            return moduleSymbol.exports["export="] !== undefined;
-        }
-        function getExportsOfModuleAsArray(moduleSymbol) {
-            return symbolsToArray(getExportsOfModule(moduleSymbol));
-        }
-        function getExportsOfSymbol(symbol) {
-            return symbol.flags & 1536 /* Module */ ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
-        }
-        function getExportsOfModule(moduleSymbol) {
-            var links = getSymbolLinks(moduleSymbol);
-            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
-        }
-        /**
-         * Extends one symbol table with another while collecting information on name collisions for error message generation into the `lookupTable` argument
-         * Not passing `lookupTable` and `exportNode` disables this collection, and just extends the tables
-         */
-        function extendExportSymbols(target, source, lookupTable, exportNode) {
-            for (var id in source) {
-                if (id !== "default" && !ts.hasProperty(target, id)) {
-                    target[id] = source[id];
-                    if (lookupTable && exportNode) {
-                        lookupTable[id] = {
-                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
-                        };
-                    }
-                }
-                else if (lookupTable && exportNode && id !== "default" && ts.hasProperty(target, id) && resolveSymbol(target[id]) !== resolveSymbol(source[id])) {
-                    if (!lookupTable[id].exportsWithDuplicate) {
-                        lookupTable[id].exportsWithDuplicate = [exportNode];
-                    }
-                    else {
-                        lookupTable[id].exportsWithDuplicate.push(exportNode);
-                    }
-                }
-            }
-        }
-        function getExportsForModule(moduleSymbol) {
-            var visitedSymbols = [];
-            return visit(moduleSymbol) || moduleSymbol.exports;
-            // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
-            // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
-            function visit(symbol) {
-                if (!(symbol && symbol.flags & 1952 /* HasExports */ && !ts.contains(visitedSymbols, symbol))) {
-                    return;
-                }
-                visitedSymbols.push(symbol);
-                var symbols = cloneSymbolTable(symbol.exports);
-                // All export * declarations are collected in an __export symbol by the binder
-                var exportStars = symbol.exports["__export"];
-                if (exportStars) {
-                    var nestedSymbols = {};
-                    var lookupTable = {};
-                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
-                        var node = _a[_i];
-                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
-                        var exportedSymbols = visit(resolvedModule);
-                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable, node);
-                    }
-                    for (var id in lookupTable) {
-                        var exportsWithDuplicate = lookupTable[id].exportsWithDuplicate;
-                        // It's not an error if the file with multiple `export *`s with duplicate names exports a member with that name itself
-                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || ts.hasProperty(symbols, id)) {
-                            continue;
-                        }
-                        for (var _b = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _b < exportsWithDuplicate_1.length; _b++) {
-                            var node = exportsWithDuplicate_1[_b];
-                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable[id].specifierText, id));
-                        }
-                    }
-                    extendExportSymbols(symbols, nestedSymbols);
-                }
-                return symbols;
-            }
-        }
-        function getMergedSymbol(symbol) {
-            var merged;
-            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
-        }
-        function getSymbolOfNode(node) {
-            return getMergedSymbol(node.symbol);
-        }
-        function getParentOfSymbol(symbol) {
-            return getMergedSymbol(symbol.parent);
-        }
-        function getExportSymbolOfValueSymbolIfExported(symbol) {
-            return symbol && (symbol.flags & 1048576 /* ExportValue */) !== 0
-                ? getMergedSymbol(symbol.exportSymbol)
-                : symbol;
-        }
-        function symbolIsValue(symbol) {
-            // If it is an instantiated symbol, then it is a value if the symbol it is an
-            // instantiation of is a value.
-            if (symbol.flags & 16777216 /* Instantiated */) {
-                return symbolIsValue(getSymbolLinks(symbol).target);
-            }
-            // If the symbol has the value flag, it is trivially a value.
-            if (symbol.flags & 107455 /* Value */) {
-                return true;
-            }
-            // If it is an alias, then it is a value if the symbol it resolves to is a value.
-            if (symbol.flags & 8388608 /* Alias */) {
-                return (resolveAlias(symbol).flags & 107455 /* Value */) !== 0;
-            }
-            return false;
-        }
-        function findConstructorDeclaration(node) {
-            var members = node.members;
-            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
-                var member = members_1[_i];
-                if (member.kind === 148 /* Constructor */ && ts.nodeIsPresent(member.body)) {
-                    return member;
-                }
-            }
-        }
-        function createType(flags) {
-            var result = new Type(checker, flags);
-            result.id = typeCount;
-            typeCount++;
-            return result;
-        }
-        function createIntrinsicType(kind, intrinsicName) {
-            var type = createType(kind);
-            type.intrinsicName = intrinsicName;
-            return type;
-        }
-        function createObjectType(kind, symbol) {
-            var type = createType(kind);
-            type.symbol = symbol;
-            return type;
-        }
-        // A reserved member name starts with two underscores, but the third character cannot be an underscore
-        // or the @ symbol. A third underscore indicates an escaped form of an identifer that started
-        // with at least two underscores. The @ character indicates that the name is denoted by a well known ES
-        // Symbol instance.
-        function isReservedMemberName(name) {
-            return name.charCodeAt(0) === 95 /* _ */ &&
-                name.charCodeAt(1) === 95 /* _ */ &&
-                name.charCodeAt(2) !== 95 /* _ */ &&
-                name.charCodeAt(2) !== 64 /* at */;
-        }
-        function getNamedMembers(members) {
-            var result;
-            for (var id in members) {
-                if (ts.hasProperty(members, id)) {
-                    if (!isReservedMemberName(id)) {
-                        if (!result)
-                            result = [];
-                        var symbol = members[id];
-                        if (symbolIsValue(symbol)) {
-                            result.push(symbol);
-                        }
-                    }
-                }
-            }
-            return result || emptyArray;
-        }
-        function setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            type.members = members;
-            type.properties = getNamedMembers(members);
-            type.callSignatures = callSignatures;
-            type.constructSignatures = constructSignatures;
-            if (stringIndexInfo)
-                type.stringIndexInfo = stringIndexInfo;
-            if (numberIndexInfo)
-                type.numberIndexInfo = numberIndexInfo;
-            return type;
-        }
-        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
-            return setObjectTypeMembers(createObjectType(65536 /* Anonymous */, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
-            var result;
-            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
-                // Locals of a source file are not in scope (because they get merged into the global symbol table)
-                if (location_1.locals && !isGlobalSourceFile(location_1)) {
-                    if (result = callback(location_1.locals)) {
-                        return result;
-                    }
-                }
-                switch (location_1.kind) {
-                    case 256 /* SourceFile */:
-                        if (!ts.isExternalOrCommonJsModule(location_1)) {
-                            break;
-                        }
-                    case 225 /* ModuleDeclaration */:
-                        if (result = callback(getSymbolOfNode(location_1).exports)) {
-                            return result;
-                        }
-                        break;
-                }
-            }
-            return callback(globals);
-        }
-        function getQualifiedLeftMeaning(rightMeaning) {
-            // If we are looking in value space, the parent meaning is value, other wise it is namespace
-            return rightMeaning === 107455 /* Value */ ? 107455 /* Value */ : 1536 /* Namespace */;
-        }
-        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
-            function getAccessibleSymbolChainFromSymbolTable(symbols) {
-                function canQualifySymbol(symbolFromSymbolTable, meaning) {
-                    // If the symbol is equivalent and doesn't need further qualification, this symbol is accessible
-                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
-                        return true;
-                    }
-                    // If symbol needs qualification, make sure that parent is accessible, if it is then this symbol is accessible too
-                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
-                    return !!accessibleParent;
-                }
-                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
-                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
-                        // if the symbolFromSymbolTable is not external module (it could be if it was determined as ambient external module and would be in globals table)
-                        // and if symbolFromSymbolTable or alias resolution matches the symbol,
-                        // check the symbol can be qualified, it is only then this symbol is accessible
-                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
-                            canQualifySymbol(symbolFromSymbolTable, meaning);
-                    }
-                }
-                // If symbol is directly available by its name in the symbol table
-                if (isAccessible(ts.lookUp(symbols, symbol.name))) {
-                    return [symbol];
-                }
-                // Check if symbol is any of the alias
-                return ts.forEachValue(symbols, function (symbolFromSymbolTable) {
-                    if (symbolFromSymbolTable.flags & 8388608 /* Alias */
-                        && symbolFromSymbolTable.name !== "export="
-                        && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238 /* ExportSpecifier */)) {
-                        if (!useOnlyExternalAliasing ||
-                            // Is this external alias, then use it to name
-                            ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
-                            var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
-                            if (isAccessible(symbolFromSymbolTable, resolveAlias(symbolFromSymbolTable))) {
-                                return [symbolFromSymbolTable];
-                            }
-                            // Look in the exported members, if we can find accessibleSymbolChain, symbol is accessible using this chain
-                            // but only if the symbolFromSymbolTable can be qualified
-                            var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTable(resolvedImportedSymbol.exports) : undefined;
-                            if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
-                                return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
-                            }
-                        }
-                    }
-                });
-            }
-            if (symbol) {
-                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
-                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
-                }
-            }
-        }
-        function needsQualification(symbol, enclosingDeclaration, meaning) {
-            var qualify = false;
-            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
-                // If symbol of this name is not available in the symbol table we are ok
-                if (!ts.hasProperty(symbolTable, symbol.name)) {
-                    // Continue to the next symbol table
-                    return false;
-                }
-                // If the symbol with this name is present it should refer to the symbol
-                var symbolFromSymbolTable = symbolTable[symbol.name];
-                if (symbolFromSymbolTable === symbol) {
-                    // No need to qualify
-                    return true;
-                }
-                // Qualify if the symbol from symbol table has same meaning as expected
-                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 /* Alias */ && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238 /* ExportSpecifier */)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
-                if (symbolFromSymbolTable.flags & meaning) {
-                    qualify = true;
-                    return true;
-                }
-                // Continue to the next symbol table
-                return false;
-            });
-            return qualify;
-        }
-        function isPropertyOrMethodDeclarationSymbol(symbol) {
-            if (symbol.declarations && symbol.declarations.length) {
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var declaration = _a[_i];
-                    switch (declaration.kind) {
-                        case 145 /* PropertyDeclaration */:
-                        case 147 /* MethodDeclaration */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                            continue;
-                        default:
-                            return false;
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function isSymbolAccessible(symbol, enclosingDeclaration, meaning) {
-            if (symbol && enclosingDeclaration && !(symbol.flags & 262144 /* TypeParameter */)) {
-                var initialSymbol = symbol;
-                var meaningToLook = meaning;
-                while (symbol) {
-                    // Symbol is accessible if it by itself is accessible
-                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, /*useOnlyExternalAliasing*/ false);
-                    if (accessibleSymbolChain) {
-                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0]);
-                        if (!hasAccessibleDeclarations) {
-                            return {
-                                accessibility: 1 /* NotAccessible */,
-                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1536 /* Namespace */) : undefined
-                            };
-                        }
-                        return hasAccessibleDeclarations;
-                    }
-                    // If we haven't got the accessible symbol, it doesn't mean the symbol is actually inaccessible.
-                    // It could be a qualified symbol and hence verify the path
-                    // e.g.:
-                    // module m {
-                    //     export class c {
-                    //     }
-                    // }
-                    // const x: typeof m.c
-                    // In the above example when we start with checking if typeof m.c symbol is accessible,
-                    // we are going to see if c can be accessed in scope directly.
-                    // But it can't, hence the accessible is going to be undefined, but that doesn't mean m.c is inaccessible
-                    // It is accessible if the parent m is accessible because then m.c can be accessed through qualification
-                    meaningToLook = getQualifiedLeftMeaning(meaning);
-                    symbol = getParentOfSymbol(symbol);
-                }
-                // This could be a symbol that is not exported in the external module
-                // or it could be a symbol from different external module that is not aliased and hence cannot be named
-                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
-                if (symbolExternalModule) {
-                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
-                    if (symbolExternalModule !== enclosingExternalModule) {
-                        // name from different external module that is not visible
-                        return {
-                            accessibility: 2 /* CannotBeNamed */,
-                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
-                            errorModuleName: symbolToString(symbolExternalModule)
-                        };
-                    }
-                }
-                // Just a local name that is not accessible
-                return {
-                    accessibility: 1 /* NotAccessible */,
-                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning)
-                };
-            }
-            return { accessibility: 0 /* Accessible */ };
-            function getExternalModuleContainer(declaration) {
-                for (; declaration; declaration = declaration.parent) {
-                    if (hasExternalModuleSymbol(declaration)) {
-                        return getSymbolOfNode(declaration);
-                    }
-                }
-            }
-        }
-        function hasExternalModuleSymbol(declaration) {
-            return ts.isAmbientModule(declaration) || (declaration.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(declaration));
-        }
-        function hasVisibleDeclarations(symbol) {
-            var aliasesToMakeVisible;
-            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
-                return undefined;
-            }
-            return { accessibility: 0 /* Accessible */, aliasesToMakeVisible: aliasesToMakeVisible };
-            function getIsDeclarationVisible(declaration) {
-                if (!isDeclarationVisible(declaration)) {
-                    // Mark the unexported alias as visible if its parent is visible
-                    // because these kind of aliases can be used to name types in declaration file
-                    var anyImportSyntax = getAnyImportSyntax(declaration);
-                    if (anyImportSyntax &&
-                        !(anyImportSyntax.flags & 1 /* Export */) &&
-                        isDeclarationVisible(anyImportSyntax.parent)) {
-                        getNodeLinks(declaration).isVisible = true;
-                        if (aliasesToMakeVisible) {
-                            if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
-                                aliasesToMakeVisible.push(anyImportSyntax);
-                            }
-                        }
-                        else {
-                            aliasesToMakeVisible = [anyImportSyntax];
-                        }
-                        return true;
-                    }
-                    // Declaration is not visible
-                    return false;
-                }
-                return true;
-            }
-        }
-        function isEntityNameVisible(entityName, enclosingDeclaration) {
-            // get symbol of the first identifier of the entityName
-            var meaning;
-            if (entityName.parent.kind === 158 /* TypeQuery */ || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                // Typeof value
-                meaning = 107455 /* Value */ | 1048576 /* ExportValue */;
-            }
-            else if (entityName.kind === 139 /* QualifiedName */ || entityName.kind === 172 /* PropertyAccessExpression */ ||
-                entityName.parent.kind === 229 /* ImportEqualsDeclaration */) {
-                // Left identifier from type reference or TypeAlias
-                // Entity name of the import declaration
-                meaning = 1536 /* Namespace */;
-            }
-            else {
-                // Type Reference or TypeAlias entity = Identifier
-                meaning = 793056 /* Type */;
-            }
-            var firstIdentifier = getFirstIdentifier(entityName);
-            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
-            // Verify if the symbol is accessible
-            return (symbol && hasVisibleDeclarations(symbol)) || {
-                accessibility: 1 /* NotAccessible */,
-                errorSymbolName: ts.getTextOfNode(firstIdentifier),
-                errorNode: firstIdentifier
-            };
-        }
-        function writeKeyword(writer, kind) {
-            writer.writeKeyword(ts.tokenToString(kind));
-        }
-        function writePunctuation(writer, kind) {
-            writer.writePunctuation(ts.tokenToString(kind));
-        }
-        function writeSpace(writer) {
-            writer.writeSpace(" ");
-        }
-        function symbolToString(symbol, enclosingDeclaration, meaning) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function signatureToString(signature, enclosingDeclaration, flags, kind) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function typeToString(type, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            var maxLength = compilerOptions.noErrorTruncation || flags & 4 /* NoTruncation */ ? undefined : 100;
-            if (maxLength && result.length >= maxLength) {
-                result = result.substr(0, maxLength - "...".length) + "...";
-            }
-            return result;
-        }
-        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
-            var writer = ts.getSingleLineStringWriter();
-            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
-            var result = writer.string();
-            ts.releaseStringWriter(writer);
-            return result;
-        }
-        function visibilityToString(flags) {
-            if (flags === 8 /* Private */) {
-                return "private";
-            }
-            if (flags === 16 /* Protected */) {
-                return "protected";
-            }
-            return "public";
-        }
-        function getTypeAliasForTypeLiteral(type) {
-            if (type.symbol && type.symbol.flags & 2048 /* TypeLiteral */) {
-                var node = type.symbol.declarations[0].parent;
-                while (node.kind === 164 /* ParenthesizedType */) {
-                    node = node.parent;
-                }
-                if (node.kind === 223 /* TypeAliasDeclaration */) {
-                    return getSymbolOfNode(node);
-                }
-            }
-            return undefined;
-        }
-        function isTopLevelInExternalModuleAugmentation(node) {
-            return node && node.parent &&
-                node.parent.kind === 226 /* ModuleBlock */ &&
-                ts.isExternalModuleAugmentation(node.parent.parent);
-        }
-        function getSymbolDisplayBuilder() {
-            function getNameOfSymbol(symbol) {
-                if (symbol.declarations && symbol.declarations.length) {
-                    var declaration = symbol.declarations[0];
-                    if (declaration.name) {
-                        return ts.declarationNameToString(declaration.name);
-                    }
-                    switch (declaration.kind) {
-                        case 192 /* ClassExpression */:
-                            return "(Anonymous class)";
-                        case 179 /* FunctionExpression */:
-                        case 180 /* ArrowFunction */:
-                            return "(Anonymous function)";
-                    }
-                }
-                return symbol.name;
-            }
-            /**
-             * Writes only the name of the symbol out to the writer. Uses the original source text
-             * for the name of the symbol if it is available to match how the user wrote the name.
-             */
-            function appendSymbolNameOnly(symbol, writer) {
-                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
-            }
-            /**
-             * Writes a property access or element access with the name of the symbol out to the writer.
-             * Uses the original source text for the name of the symbol if it is available to match how the user wrote the name,
-             * ensuring that any names written with literals use element accesses.
-             */
-            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
-                var symbolName = getNameOfSymbol(symbol);
-                var firstChar = symbolName.charCodeAt(0);
-                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
-                if (needsElementAccess) {
-                    writePunctuation(writer, 19 /* OpenBracketToken */);
-                    if (ts.isSingleOrDoubleQuote(firstChar)) {
-                        writer.writeStringLiteral(symbolName);
-                    }
-                    else {
-                        writer.writeSymbol(symbolName, symbol);
-                    }
-                    writePunctuation(writer, 20 /* CloseBracketToken */);
-                }
-                else {
-                    writePunctuation(writer, 21 /* DotToken */);
-                    writer.writeSymbol(symbolName, symbol);
-                }
-            }
-            /**
-             * Enclosing declaration is optional when we don't want to get qualified name in the enclosing declaration scope
-             * Meaning needs to be specified if the enclosing declaration is given
-             */
-            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
-                var parentSymbol;
-                function appendParentTypeArgumentsAndSymbolName(symbol) {
-                    if (parentSymbol) {
-                        // Write type arguments of instantiated class/interface here
-                        if (flags & 1 /* WriteTypeParametersOrArguments */) {
-                            if (symbol.flags & 16777216 /* Instantiated */) {
-                                buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration);
-                            }
-                            else {
-                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
-                            }
-                        }
-                        appendPropertyOrElementAccessForSymbol(symbol, writer);
-                    }
-                    else {
-                        appendSymbolNameOnly(symbol, writer);
-                    }
-                    parentSymbol = symbol;
-                }
-                // const the writer know we just wrote out a symbol.  The declaration emitter writer uses
-                // this to determine if an import it has previously seen (and not written out) needs
-                // to be written to the file once the walk of the tree is complete.
-                //
-                // NOTE(cyrusn): This approach feels somewhat unfortunate.  A simple pass over the tree
-                // up front (for example, during checking) could determine if we need to emit the imports
-                // and we could then access that data during declaration emit.
-                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
-                function walkSymbol(symbol, meaning) {
-                    if (symbol) {
-                        var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2 /* UseOnlyExternalAliasing */));
-                        if (!accessibleSymbolChain ||
-                            needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
-                            // Go up and add our parent.
-                            walkSymbol(getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol), getQualifiedLeftMeaning(meaning));
-                        }
-                        if (accessibleSymbolChain) {
-                            for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
-                                var accessibleSymbol = accessibleSymbolChain_1[_i];
-                                appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
-                            }
-                        }
-                        else {
-                            // If we didn't find accessible symbol chain for this symbol, break if this is external module
-                            if (!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) {
-                                return;
-                            }
-                            // if this is anonymous type break
-                            if (symbol.flags & 2048 /* TypeLiteral */ || symbol.flags & 4096 /* ObjectLiteral */) {
-                                return;
-                            }
-                            appendParentTypeArgumentsAndSymbolName(symbol);
-                        }
-                    }
-                }
-                // Get qualified name if the symbol is not a type parameter
-                // and there is an enclosing declaration or we specifically
-                // asked for it
-                var isTypeParameter = symbol.flags & 262144 /* TypeParameter */;
-                var typeFormatFlag = 128 /* UseFullyQualifiedType */ & typeFlags;
-                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
-                    walkSymbol(symbol, meaning);
-                    return;
-                }
-                return appendParentTypeArgumentsAndSymbolName(symbol);
-            }
-            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
-                var globalFlagsToPass = globalFlags & 16 /* WriteOwnNameForAnyLike */;
-                var inObjectTypeLiteral = false;
-                return writeType(type, globalFlags);
-                function writeType(type, flags) {
-                    // Write undefined/null type as any
-                    if (type.flags & 150995071 /* Intrinsic */) {
-                        // Special handling for unknown / resolving types, they should show up as any and not unknown or __resolving
-                        writer.writeKeyword(!(globalFlags & 16 /* WriteOwnNameForAnyLike */) && isTypeAny(type)
-                            ? "any"
-                            : type.intrinsicName);
-                    }
-                    else if (type.flags & 33554432 /* ThisType */) {
-                        if (inObjectTypeLiteral) {
-                            writer.reportInaccessibleThisError();
-                        }
-                        writer.writeKeyword("this");
-                    }
-                    else if (type.flags & 4096 /* Reference */) {
-                        writeTypeReference(type, flags);
-                    }
-                    else if (type.flags & (1024 /* Class */ | 2048 /* Interface */ | 128 /* Enum */ | 512 /* TypeParameter */)) {
-                        // The specified symbol flags need to be reinterpreted as type flags
-                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793056 /* Type */, 0 /* None */, flags);
-                    }
-                    else if (type.flags & 8192 /* Tuple */) {
-                        writeTupleType(type);
-                    }
-                    else if (type.flags & 49152 /* UnionOrIntersection */) {
-                        writeUnionOrIntersectionType(type, flags);
-                    }
-                    else if (type.flags & 65536 /* Anonymous */) {
-                        writeAnonymousType(type, flags);
-                    }
-                    else if (type.flags & 256 /* StringLiteral */) {
-                        writer.writeStringLiteral("\"" + ts.escapeString(type.text) + "\"");
-                    }
-                    else {
-                        // Should never get here
-                        // { ... }
-                        writePunctuation(writer, 15 /* OpenBraceToken */);
-                        writeSpace(writer);
-                        writePunctuation(writer, 22 /* DotDotDotToken */);
-                        writeSpace(writer);
-                        writePunctuation(writer, 16 /* CloseBraceToken */);
-                    }
-                }
-                function writeTypeList(types, delimiter) {
-                    for (var i = 0; i < types.length; i++) {
-                        if (i > 0) {
-                            if (delimiter !== 24 /* CommaToken */) {
-                                writeSpace(writer);
-                            }
-                            writePunctuation(writer, delimiter);
-                            writeSpace(writer);
-                        }
-                        writeType(types[i], delimiter === 24 /* CommaToken */ ? 0 /* None */ : 64 /* InElementType */);
-                    }
-                }
-                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
-                    // Unnamed function expressions and arrow functions have reserved names that we don't want to display
-                    if (symbol.flags & 32 /* Class */ || !isReservedMemberName(symbol.name)) {
-                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793056 /* Type */, 0 /* None */, flags);
-                    }
-                    if (pos < end) {
-                        writePunctuation(writer, 25 /* LessThanToken */);
-                        writeType(typeArguments[pos], 256 /* InFirstTypeArgument */);
-                        pos++;
-                        while (pos < end) {
-                            writePunctuation(writer, 24 /* CommaToken */);
-                            writeSpace(writer);
-                            writeType(typeArguments[pos], 0 /* None */);
-                            pos++;
-                        }
-                        writePunctuation(writer, 27 /* GreaterThanToken */);
-                    }
-                }
-                function writeTypeReference(type, flags) {
-                    var typeArguments = type.typeArguments || emptyArray;
-                    if (type.target === globalArrayType && !(flags & 1 /* WriteArrayAsGenericType */)) {
-                        writeType(typeArguments[0], 64 /* InElementType */);
-                        writePunctuation(writer, 19 /* OpenBracketToken */);
-                        writePunctuation(writer, 20 /* CloseBracketToken */);
-                    }
-                    else {
-                        // Write the type reference in the format f<A>.g<B>.C<X, Y> where A and B are type arguments
-                        // for outer type parameters, and f and g are the respective declaring containers of those
-                        // type parameters.
-                        var outerTypeParameters = type.target.outerTypeParameters;
-                        var i = 0;
-                        if (outerTypeParameters) {
-                            var length_1 = outerTypeParameters.length;
-                            while (i < length_1) {
-                                // Find group of type arguments for type parameters with the same declaring container.
-                                var start = i;
-                                var parent_6 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
-                                do {
-                                    i++;
-                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_6);
-                                // When type parameters are their own type arguments for the whole group (i.e. we have
-                                // the default outer type arguments), we don't show the group.
-                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
-                                    writeSymbolTypeReference(parent_6, typeArguments, start, i, flags);
-                                    writePunctuation(writer, 21 /* DotToken */);
-                                }
-                            }
-                        }
-                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
-                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
-                    }
-                }
-                function writeTupleType(type) {
-                    writePunctuation(writer, 19 /* OpenBracketToken */);
-                    writeTypeList(type.elementTypes, 24 /* CommaToken */);
-                    writePunctuation(writer, 20 /* CloseBracketToken */);
-                }
-                function writeUnionOrIntersectionType(type, flags) {
-                    if (flags & 64 /* InElementType */) {
-                        writePunctuation(writer, 17 /* OpenParenToken */);
-                    }
-                    writeTypeList(type.types, type.flags & 16384 /* Union */ ? 47 /* BarToken */ : 46 /* AmpersandToken */);
-                    if (flags & 64 /* InElementType */) {
-                        writePunctuation(writer, 18 /* CloseParenToken */);
-                    }
-                }
-                function writeAnonymousType(type, flags) {
-                    var symbol = type.symbol;
-                    if (symbol) {
-                        // Always use 'typeof T' for type of class, enum, and module objects
-                        if (symbol.flags & (32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
-                            writeTypeOfSymbol(type, flags);
-                        }
-                        else if (shouldWriteTypeOfFunctionSymbol()) {
-                            writeTypeOfSymbol(type, flags);
-                        }
-                        else if (ts.contains(symbolStack, symbol)) {
-                            // If type is an anonymous type literal in a type alias declaration, use type alias name
-                            var typeAlias = getTypeAliasForTypeLiteral(type);
-                            if (typeAlias) {
-                                // The specified symbol flags need to be reinterpreted as type flags
-                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793056 /* Type */, 0 /* None */, flags);
-                            }
-                            else {
-                                // Recursive usage, use any
-                                writeKeyword(writer, 117 /* AnyKeyword */);
-                            }
-                        }
-                        else {
-                            // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
-                            // of types allows us to catch circular references to instantiations of the same anonymous type
-                            if (!symbolStack) {
-                                symbolStack = [];
-                            }
-                            symbolStack.push(symbol);
-                            writeLiteralType(type, flags);
-                            symbolStack.pop();
-                        }
-                    }
-                    else {
-                        // Anonymous types with no symbol are never circular
-                        writeLiteralType(type, flags);
-                    }
-                    function shouldWriteTypeOfFunctionSymbol() {
-                        var isStaticMethodSymbol = !!(symbol.flags & 8192 /* Method */ &&
-                            ts.forEach(symbol.declarations, function (declaration) { return declaration.flags & 32 /* Static */; }));
-                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16 /* Function */) &&
-                            (symbol.parent ||
-                                ts.forEach(symbol.declarations, function (declaration) {
-                                    return declaration.parent.kind === 256 /* SourceFile */ || declaration.parent.kind === 226 /* ModuleBlock */;
-                                }));
-                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
-                            // typeof is allowed only for static/non local functions
-                            return !!(flags & 2 /* UseTypeOfFunction */) ||
-                                (ts.contains(symbolStack, symbol)); // it is type of the symbol uses itself recursively
-                        }
-                    }
-                }
-                function writeTypeOfSymbol(type, typeFormatFlags) {
-                    writeKeyword(writer, 101 /* TypeOfKeyword */);
-                    writeSpace(writer);
-                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455 /* Value */, 0 /* None */, typeFormatFlags);
-                }
-                function writeIndexSignature(info, keyword) {
-                    if (info) {
-                        if (info.isReadonly) {
-                            writeKeyword(writer, 128 /* ReadonlyKeyword */);
-                            writeSpace(writer);
-                        }
-                        writePunctuation(writer, 19 /* OpenBracketToken */);
-                        writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
-                        writePunctuation(writer, 54 /* ColonToken */);
-                        writeSpace(writer);
-                        writeKeyword(writer, keyword);
-                        writePunctuation(writer, 20 /* CloseBracketToken */);
-                        writePunctuation(writer, 54 /* ColonToken */);
-                        writeSpace(writer);
-                        writeType(info.type, 0 /* None */);
-                        writePunctuation(writer, 23 /* SemicolonToken */);
-                        writer.writeLine();
-                    }
-                }
-                function writePropertyWithModifiers(prop) {
-                    if (isReadonlySymbol(prop)) {
-                        writeKeyword(writer, 128 /* ReadonlyKeyword */);
-                        writeSpace(writer);
-                    }
-                    buildSymbolDisplay(prop, writer);
-                    if (prop.flags & 536870912 /* Optional */) {
-                        writePunctuation(writer, 53 /* QuestionToken */);
-                    }
-                }
-                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
-                    if (flags & 64 /* InElementType */) {
-                        return true;
-                    }
-                    else if (flags & 256 /* InFirstTypeArgument */) {
-                        // Add parenthesis around function type for the first type argument to avoid ambiguity
-                        var typeParameters = callSignature.target && (flags & 32 /* WriteTypeArgumentsOfSignature */) ?
-                            callSignature.target.typeParameters : callSignature.typeParameters;
-                        return typeParameters && typeParameters.length !== 0;
-                    }
-                    return false;
-                }
-                function writeLiteralType(type, flags) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
-                            writePunctuation(writer, 15 /* OpenBraceToken */);
-                            writePunctuation(writer, 16 /* CloseBraceToken */);
-                            return;
-                        }
-                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
-                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 17 /* OpenParenToken */);
-                            }
-                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
-                            if (parenthesizeSignature) {
-                                writePunctuation(writer, 18 /* CloseParenToken */);
-                            }
-                            return;
-                        }
-                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
-                            if (flags & 64 /* InElementType */) {
-                                writePunctuation(writer, 17 /* OpenParenToken */);
-                            }
-                            writeKeyword(writer, 92 /* NewKeyword */);
-                            writeSpace(writer);
-                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
-                            if (flags & 64 /* InElementType */) {
-                                writePunctuation(writer, 18 /* CloseParenToken */);
-                            }
-                            return;
-                        }
-                    }
-                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
-                    inObjectTypeLiteral = true;
-                    writePunctuation(writer, 15 /* OpenBraceToken */);
-                    writer.writeLine();
-                    writer.increaseIndent();
-                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
-                        var signature = _a[_i];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
-                        writePunctuation(writer, 23 /* SemicolonToken */);
-                        writer.writeLine();
-                    }
-                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
-                        var signature = _c[_b];
-                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1 /* Construct */, symbolStack);
-                        writePunctuation(writer, 23 /* SemicolonToken */);
-                        writer.writeLine();
-                    }
-                    writeIndexSignature(resolved.stringIndexInfo, 132 /* StringKeyword */);
-                    writeIndexSignature(resolved.numberIndexInfo, 130 /* NumberKeyword */);
-                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
-                        var p = _e[_d];
-                        var t = getTypeOfSymbol(p);
-                        if (p.flags & (16 /* Function */ | 8192 /* Method */) && !getPropertiesOfObjectType(t).length) {
-                            var signatures = getSignaturesOfType(t, 0 /* Call */);
-                            for (var _f = 0, signatures_1 = signatures; _f < signatures_1.length; _f++) {
-                                var signature = signatures_1[_f];
-                                writePropertyWithModifiers(p);
-                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
-                                writePunctuation(writer, 23 /* SemicolonToken */);
-                                writer.writeLine();
-                            }
-                        }
-                        else {
-                            writePropertyWithModifiers(p);
-                            writePunctuation(writer, 54 /* ColonToken */);
-                            writeSpace(writer);
-                            writeType(t, 0 /* None */);
-                            writePunctuation(writer, 23 /* SemicolonToken */);
-                            writer.writeLine();
-                        }
-                    }
-                    writer.decreaseIndent();
-                    writePunctuation(writer, 16 /* CloseBraceToken */);
-                    inObjectTypeLiteral = saveInObjectTypeLiteral;
-                }
-            }
-            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
-                var targetSymbol = getTargetSymbol(symbol);
-                if (targetSymbol.flags & 32 /* Class */ || targetSymbol.flags & 64 /* Interface */ || targetSymbol.flags & 524288 /* TypeAlias */) {
-                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
-                }
-            }
-            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
-                appendSymbolNameOnly(tp.symbol, writer);
-                var constraint = getConstraintOfTypeParameter(tp);
-                if (constraint) {
-                    writeSpace(writer);
-                    writeKeyword(writer, 83 /* ExtendsKeyword */);
-                    writeSpace(writer);
-                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
-                }
-            }
-            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
-                var parameterNode = p.valueDeclaration;
-                if (ts.isRestParameter(parameterNode)) {
-                    writePunctuation(writer, 22 /* DotDotDotToken */);
-                }
-                if (ts.isBindingPattern(parameterNode.name)) {
-                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    appendSymbolNameOnly(p, writer);
-                }
-                if (isOptionalParameter(parameterNode)) {
-                    writePunctuation(writer, 53 /* QuestionToken */);
-                }
-                writePunctuation(writer, 54 /* ColonToken */);
-                writeSpace(writer);
-                buildTypeDisplay(getTypeOfSymbol(p), writer, enclosingDeclaration, flags, symbolStack);
-            }
-            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
-                // We have to explicitly emit square bracket and bracket because these tokens are not stored inside the node.
-                if (bindingPattern.kind === 167 /* ObjectBindingPattern */) {
-                    writePunctuation(writer, 15 /* OpenBraceToken */);
-                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 16 /* CloseBraceToken */);
-                }
-                else if (bindingPattern.kind === 168 /* ArrayBindingPattern */) {
-                    writePunctuation(writer, 19 /* OpenBracketToken */);
-                    var elements = bindingPattern.elements;
-                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
-                    if (elements && elements.hasTrailingComma) {
-                        writePunctuation(writer, 24 /* CommaToken */);
-                    }
-                    writePunctuation(writer, 20 /* CloseBracketToken */);
-                }
-            }
-            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
-                if (bindingElement.kind === 193 /* OmittedExpression */) {
-                    return;
-                }
-                ts.Debug.assert(bindingElement.kind === 169 /* BindingElement */);
-                if (bindingElement.propertyName) {
-                    writer.writeSymbol(ts.getTextOfNode(bindingElement.propertyName), bindingElement.symbol);
-                    writePunctuation(writer, 54 /* ColonToken */);
-                    writeSpace(writer);
-                }
-                if (ts.isBindingPattern(bindingElement.name)) {
-                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    if (bindingElement.dotDotDotToken) {
-                        writePunctuation(writer, 22 /* DotDotDotToken */);
-                    }
-                    appendSymbolNameOnly(bindingElement.symbol, writer);
-                }
-            }
-            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25 /* LessThanToken */);
-                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
-                    writePunctuation(writer, 27 /* GreaterThanToken */);
-                }
-            }
-            function buildDisplayForCommaSeparatedList(list, writer, action) {
-                for (var i = 0; i < list.length; i++) {
-                    if (i > 0) {
-                        writePunctuation(writer, 24 /* CommaToken */);
-                        writeSpace(writer);
-                    }
-                    action(list[i]);
-                }
-            }
-            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration, flags, symbolStack) {
-                if (typeParameters && typeParameters.length) {
-                    writePunctuation(writer, 25 /* LessThanToken */);
-                    var flags_1 = 256 /* InFirstTypeArgument */;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (i > 0) {
-                            writePunctuation(writer, 24 /* CommaToken */);
-                            writeSpace(writer);
-                            flags_1 = 0 /* None */;
-                        }
-                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags_1);
-                    }
-                    writePunctuation(writer, 27 /* GreaterThanToken */);
-                }
-            }
-            function buildDisplayForParametersAndDelimiters(thisType, parameters, writer, enclosingDeclaration, flags, symbolStack) {
-                writePunctuation(writer, 17 /* OpenParenToken */);
-                if (thisType) {
-                    writeKeyword(writer, 97 /* ThisKeyword */);
-                    writePunctuation(writer, 54 /* ColonToken */);
-                    writeSpace(writer);
-                    buildTypeDisplay(thisType, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                for (var i = 0; i < parameters.length; i++) {
-                    if (i > 0 || thisType) {
-                        writePunctuation(writer, 24 /* CommaToken */);
-                        writeSpace(writer);
-                    }
-                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
-                }
-                writePunctuation(writer, 18 /* CloseParenToken */);
-            }
-            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    writer.writeParameter(predicate.parameterName);
-                }
-                else {
-                    writeKeyword(writer, 97 /* ThisKeyword */);
-                }
-                writeSpace(writer);
-                writeKeyword(writer, 124 /* IsKeyword */);
-                writeSpace(writer);
-                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
-            }
-            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
-                if (flags & 8 /* WriteArrowStyleSignature */) {
-                    writeSpace(writer);
-                    writePunctuation(writer, 34 /* EqualsGreaterThanToken */);
-                }
-                else {
-                    writePunctuation(writer, 54 /* ColonToken */);
-                }
-                writeSpace(writer);
-                if (signature.typePredicate) {
-                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                else {
-                    var returnType = getReturnTypeOfSignature(signature);
-                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
-                }
-            }
-            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
-                if (kind === 1 /* Construct */) {
-                    writeKeyword(writer, 92 /* NewKeyword */);
-                    writeSpace(writer);
-                }
-                if (signature.target && (flags & 32 /* WriteTypeArgumentsOfSignature */)) {
-                    // Instantiated signature, write type arguments instead
-                    // This is achieved by passing in the mapper separately
-                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
-                }
-                else {
-                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
-                }
-                buildDisplayForParametersAndDelimiters(signature.thisType, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
-                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
-            }
-            return _displayBuilder || (_displayBuilder = {
-                buildSymbolDisplay: buildSymbolDisplay,
-                buildTypeDisplay: buildTypeDisplay,
-                buildTypeParameterDisplay: buildTypeParameterDisplay,
-                buildTypePredicateDisplay: buildTypePredicateDisplay,
-                buildParameterDisplay: buildParameterDisplay,
-                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
-                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
-                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
-                buildSignatureDisplay: buildSignatureDisplay,
-                buildReturnTypeDisplay: buildReturnTypeDisplay
-            });
-        }
-        function isDeclarationVisible(node) {
-            if (node) {
-                var links = getNodeLinks(node);
-                if (links.isVisible === undefined) {
-                    links.isVisible = !!determineIfDeclarationIsVisible();
-                }
-                return links.isVisible;
-            }
-            return false;
-            function determineIfDeclarationIsVisible() {
-                switch (node.kind) {
-                    case 169 /* BindingElement */:
-                        return isDeclarationVisible(node.parent.parent);
-                    case 218 /* VariableDeclaration */:
-                        if (ts.isBindingPattern(node.name) &&
-                            !node.name.elements.length) {
-                            // If the binding pattern is empty, this variable declaration is not visible
-                            return false;
-                        }
-                    // Otherwise fall through
-                    case 225 /* ModuleDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                        // external module augmentation is always visible
-                        if (ts.isExternalModuleAugmentation(node)) {
-                            return true;
-                        }
-                        var parent_7 = getDeclarationContainer(node);
-                        // If the node is not exported or it is not ambient module element (except import declaration)
-                        if (!(ts.getCombinedNodeFlags(node) & 1 /* Export */) &&
-                            !(node.kind !== 229 /* ImportEqualsDeclaration */ && parent_7.kind !== 256 /* SourceFile */ && ts.isInAmbientContext(parent_7))) {
-                            return isGlobalSourceFile(parent_7);
-                        }
-                        // Exported members/ambient module elements (exception import declaration) are visible if parent is visible
-                        return isDeclarationVisible(parent_7);
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (node.flags & (8 /* Private */ | 16 /* Protected */)) {
-                            // Private/protected properties/methods are not visible
-                            return false;
-                        }
-                    // Public properties/methods are visible if its parents are visible, so const it fall into next case statement
-                    case 148 /* Constructor */:
-                    case 152 /* ConstructSignature */:
-                    case 151 /* CallSignature */:
-                    case 153 /* IndexSignature */:
-                    case 142 /* Parameter */:
-                    case 226 /* ModuleBlock */:
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 159 /* TypeLiteral */:
-                    case 155 /* TypeReference */:
-                    case 160 /* ArrayType */:
-                    case 161 /* TupleType */:
-                    case 162 /* UnionType */:
-                    case 163 /* IntersectionType */:
-                    case 164 /* ParenthesizedType */:
-                        return isDeclarationVisible(node.parent);
-                    // Default binding, import specifier and namespace import is visible
-                    // only on demand so by default it is not visible
-                    case 231 /* ImportClause */:
-                    case 232 /* NamespaceImport */:
-                    case 234 /* ImportSpecifier */:
-                        return false;
-                    // Type parameters are always visible
-                    case 141 /* TypeParameter */:
-                    // Source file is always visible
-                    case 256 /* SourceFile */:
-                        return true;
-                    // Export assignments do not create name bindings outside the module
-                    case 235 /* ExportAssignment */:
-                        return false;
-                    default:
-                        return false;
-                }
-            }
-        }
-        function collectLinkedAliases(node) {
-            var exportSymbol;
-            if (node.parent && node.parent.kind === 235 /* ExportAssignment */) {
-                exportSymbol = resolveName(node.parent, node.text, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */, ts.Diagnostics.Cannot_find_name_0, node);
-            }
-            else if (node.parent.kind === 238 /* ExportSpecifier */) {
-                var exportSpecifier = node.parent;
-                exportSymbol = exportSpecifier.parent.parent.moduleSpecifier ?
-                    getExternalModuleMember(exportSpecifier.parent.parent, exportSpecifier) :
-                    resolveEntityName(exportSpecifier.propertyName || exportSpecifier.name, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */);
-            }
-            var result = [];
-            if (exportSymbol) {
-                buildVisibleNodeList(exportSymbol.declarations);
-            }
-            return result;
-            function buildVisibleNodeList(declarations) {
-                ts.forEach(declarations, function (declaration) {
-                    getNodeLinks(declaration).isVisible = true;
-                    var resultNode = getAnyImportSyntax(declaration) || declaration;
-                    if (!ts.contains(result, resultNode)) {
-                        result.push(resultNode);
-                    }
-                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
-                        // Add the referenced top container visible
-                        var internalModuleReference = declaration.moduleReference;
-                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
-                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */, undefined, undefined);
-                        if (importSymbol) {
-                            buildVisibleNodeList(importSymbol.declarations);
-                        }
-                    }
-                });
-            }
-        }
-        /**
-         * Push an entry on the type resolution stack. If an entry with the given target and the given property name
-         * is already on the stack, and no entries in between already have a type, then a circularity has occurred.
-         * In this case, the result values of the existing entry and all entries pushed after it are changed to false,
-         * and the value false is returned. Otherwise, the new entry is just pushed onto the stack, and true is returned.
-         * In order to see if the same query has already been done before, the target object and the propertyName both
-         * must match the one passed in.
-         *
-         * @param target The symbol, type, or signature whose type is being queried
-         * @param propertyName The property name that should be used to query the target for its type
-         */
-        function pushTypeResolution(target, propertyName) {
-            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
-            if (resolutionCycleStartIndex >= 0) {
-                // A cycle was found
-                var length_2 = resolutionTargets.length;
-                for (var i = resolutionCycleStartIndex; i < length_2; i++) {
-                    resolutionResults[i] = false;
-                }
-                return false;
-            }
-            resolutionTargets.push(target);
-            resolutionResults.push(/*items*/ true);
-            resolutionPropertyNames.push(propertyName);
-            return true;
-        }
-        function findResolutionCycleStartIndex(target, propertyName) {
-            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
-                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
-                    return -1;
-                }
-                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
-                    return i;
-                }
-            }
-            return -1;
-        }
-        function hasType(target, propertyName) {
-            if (propertyName === 0 /* Type */) {
-                return getSymbolLinks(target).type;
-            }
-            if (propertyName === 2 /* DeclaredType */) {
-                return getSymbolLinks(target).declaredType;
-            }
-            if (propertyName === 1 /* ResolvedBaseConstructorType */) {
-                ts.Debug.assert(!!(target.flags & 1024 /* Class */));
-                return target.resolvedBaseConstructorType;
-            }
-            if (propertyName === 3 /* ResolvedReturnType */) {
-                return target.resolvedReturnType;
-            }
-            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
-        }
-        // Pop an entry from the type resolution stack and return its associated result value. The result value will
-        // be true if no circularities were detected, or false if a circularity was found.
-        function popTypeResolution() {
-            resolutionTargets.pop();
-            resolutionPropertyNames.pop();
-            return resolutionResults.pop();
-        }
-        function getDeclarationContainer(node) {
-            node = ts.getRootDeclaration(node);
-            while (node) {
-                switch (node.kind) {
-                    case 218 /* VariableDeclaration */:
-                    case 219 /* VariableDeclarationList */:
-                    case 234 /* ImportSpecifier */:
-                    case 233 /* NamedImports */:
-                    case 232 /* NamespaceImport */:
-                    case 231 /* ImportClause */:
-                        node = node.parent;
-                        break;
-                    default:
-                        return node.parent;
-                }
-            }
-        }
-        function getTypeOfPrototypeProperty(prototype) {
-            // TypeScript 1.0 spec (April 2014): 8.4
-            // Every class automatically contains a static property member named 'prototype',
-            // the type of which is an instantiation of the class type with type Any supplied as a type argument for each type parameter.
-            // It is an error to explicitly declare a static property member with the name 'prototype'.
-            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
-            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
-        }
-        // Return the type of the given property in the given type, or undefined if no such property exists
-        function getTypeOfPropertyOfType(type, name) {
-            var prop = getPropertyOfType(type, name);
-            return prop ? getTypeOfSymbol(prop) : undefined;
-        }
-        function isTypeAny(type) {
-            return type && (type.flags & 1 /* Any */) !== 0;
-        }
-        // Return the type of a binding element parent. We check SymbolLinks first to see if a type has been
-        // assigned by contextual typing.
-        function getTypeForBindingElementParent(node) {
-            var symbol = getSymbolOfNode(node);
-            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false);
-        }
-        function getTextOfPropertyName(name) {
-            switch (name.kind) {
-                case 69 /* Identifier */:
-                    return name.text;
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                    return name.text;
-                case 140 /* ComputedPropertyName */:
-                    if (ts.isStringOrNumericLiteral(name.expression.kind)) {
-                        return name.expression.text;
-                    }
-            }
-            return undefined;
-        }
-        function isComputedNonLiteralName(name) {
-            return name.kind === 140 /* ComputedPropertyName */ && !ts.isStringOrNumericLiteral(name.expression.kind);
-        }
-        /** Return the inferred type for a binding element */
-        function getTypeForBindingElement(declaration) {
-            var pattern = declaration.parent;
-            var parentType = getTypeForBindingElementParent(pattern.parent);
-            // If parent has the unknown (error) type, then so does this binding element
-            if (parentType === unknownType) {
-                return unknownType;
-            }
-            // If no type was specified or inferred for parent, or if the specified or inferred type is any,
-            // infer from the initializer of the binding element if one is present. Otherwise, go with the
-            // undefined or any type of the parent.
-            if (!parentType || isTypeAny(parentType)) {
-                if (declaration.initializer) {
-                    return checkExpressionCached(declaration.initializer);
-                }
-                return parentType;
-            }
-            var type;
-            if (pattern.kind === 167 /* ObjectBindingPattern */) {
-                // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form)
-                var name_10 = declaration.propertyName || declaration.name;
-                if (isComputedNonLiteralName(name_10)) {
-                    // computed properties with non-literal names are treated as 'any'
-                    return anyType;
-                }
-                if (declaration.initializer) {
-                    getContextualType(declaration.initializer);
-                }
-                // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature,
-                // or otherwise the type of the string index signature.
-                var text = getTextOfPropertyName(name_10);
-                type = getTypeOfPropertyOfType(parentType, text) ||
-                    isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1 /* Number */) ||
-                    getIndexTypeOfType(parentType, 0 /* String */);
-                if (!type) {
-                    error(name_10, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_10));
-                    return unknownType;
-                }
-            }
-            else {
-                // This elementType will be used if the specific property corresponding to this index is not
-                // present (aka the tuple element property). This call also checks that the parentType is in
-                // fact an iterable or array (depending on target language).
-                var elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false);
-                if (!declaration.dotDotDotToken) {
-                    // Use specific property type when parent is a tuple or numeric index type when parent is an array
-                    var propName = "" + ts.indexOf(pattern.elements, declaration);
-                    type = isTupleLikeType(parentType)
-                        ? getTypeOfPropertyOfType(parentType, propName)
-                        : elementType;
-                    if (!type) {
-                        if (isTupleType(parentType)) {
-                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), parentType.elementTypes.length, pattern.elements.length);
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
-                        }
-                        return unknownType;
-                    }
-                }
-                else {
-                    // Rest element has an array type with the same element type as the parent type
-                    type = createArrayType(elementType);
-                }
-            }
-            // In strict null checking mode, if a default value of a non-undefined type is specified, remove
-            // undefined from the final type.
-            if (strictNullChecks && declaration.initializer && !(getNullableKind(checkExpressionCached(declaration.initializer)) & 32 /* Undefined */)) {
-                type = getTypeWithFacts(type, 131072 /* NEUndefined */);
-            }
-            return type;
-        }
-        function getTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            var jsDocType = getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-            if (jsDocType) {
-                return getTypeFromTypeNode(jsDocType);
-            }
-        }
-        function getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
-            // First, see if this node has an @type annotation on it directly.
-            var typeTag = ts.getJSDocTypeTag(declaration);
-            if (typeTag && typeTag.typeExpression) {
-                return typeTag.typeExpression.type;
-            }
-            if (declaration.kind === 218 /* VariableDeclaration */ &&
-                declaration.parent.kind === 219 /* VariableDeclarationList */ &&
-                declaration.parent.parent.kind === 200 /* VariableStatement */) {
-                // @type annotation might have been on the variable statement, try that instead.
-                var annotation = ts.getJSDocTypeTag(declaration.parent.parent);
-                if (annotation && annotation.typeExpression) {
-                    return annotation.typeExpression.type;
-                }
-            }
-            else if (declaration.kind === 142 /* Parameter */) {
-                // If it's a parameter, see if the parent has a jsdoc comment with an @param
-                // annotation.
-                var paramTag = ts.getCorrespondingJSDocParameterTag(declaration);
-                if (paramTag && paramTag.typeExpression) {
-                    return paramTag.typeExpression.type;
-                }
-            }
-            return undefined;
-        }
-        function addOptionality(type, optional) {
-            return strictNullChecks && optional ? addNullableKind(type, 32 /* Undefined */) : type;
-        }
-        // Return the inferred type for a variable, parameter, or property declaration
-        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
-            if (declaration.flags & 134217728 /* JavaScriptFile */) {
-                // If this is a variable in a JavaScript file, then use the JSDoc type (if it has
-                // one as its type), otherwise fallback to the below standard TS codepaths to
-                // try to figure it out.
-                var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            // A variable declared in a for..in statement is always of type string
-            if (declaration.parent.parent.kind === 207 /* ForInStatement */) {
-                return stringType;
-            }
-            if (declaration.parent.parent.kind === 208 /* ForOfStatement */) {
-                // checkRightHandSideOfForOf will return undefined if the for-of expression type was
-                // missing properties/signatures required to get its iteratedType (like
-                // [Symbol.iterator] or next). This may be because we accessed properties from anyType,
-                // or it may have led to an error inside getElementTypeOfIterable.
-                return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType;
-            }
-            if (ts.isBindingPattern(declaration.parent)) {
-                return getTypeForBindingElement(declaration);
-            }
-            // Use type from type annotation if one is present
-            if (declaration.type) {
-                return addOptionality(getTypeFromTypeNode(declaration.type), /*optional*/ declaration.questionToken && includeOptionality);
-            }
-            if (declaration.kind === 142 /* Parameter */) {
-                var func = declaration.parent;
-                // For a parameter of a set accessor, use the type of the get accessor if one is present
-                if (func.kind === 150 /* SetAccessor */ && !ts.hasDynamicName(func)) {
-                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149 /* GetAccessor */);
-                    if (getter) {
-                        var signature = getSignatureFromDeclaration(getter);
-                        var thisParameter = getAccessorThisParameter(func);
-                        if (thisParameter && declaration === thisParameter) {
-                            return signature.thisType;
-                        }
-                        return getReturnTypeOfSignature(signature);
-                    }
-                }
-                // Use contextual parameter type if one is available
-                var type = declaration.symbol.name === "this"
-                    ? getContextuallyTypedThisType(func)
-                    : getContextuallyTypedParameterType(declaration);
-                if (type) {
-                    return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
-                }
-            }
-            // Use the type of the initializer expression if one is present
-            if (declaration.initializer) {
-                return addOptionality(checkExpressionCached(declaration.initializer), /*optional*/ declaration.questionToken && includeOptionality);
-            }
-            // If it is a short-hand property assignment, use the type of the identifier
-            if (declaration.kind === 254 /* ShorthandPropertyAssignment */) {
-                return checkIdentifier(declaration.name);
-            }
-            // If the declaration specifies a binding pattern, use the type implied by the binding pattern
-            if (ts.isBindingPattern(declaration.name)) {
-                return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ false);
-            }
-            // No type specified and nothing can be inferred
-            return undefined;
-        }
-        // Return the type implied by a binding pattern element. This is the type of the initializer of the element if
-        // one is present. Otherwise, if the element is itself a binding pattern, it is the type implied by the binding
-        // pattern. Otherwise, it is the type any.
-        function getTypeFromBindingElement(element, includePatternInType) {
-            if (element.initializer) {
-                var type = checkExpressionCached(element.initializer);
-                reportErrorsFromWidening(element, type);
-                return getWidenedType(type);
-            }
-            if (ts.isBindingPattern(element.name)) {
-                return getTypeFromBindingPattern(element.name, includePatternInType);
-            }
-            if (compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
-                reportImplicitAnyError(element, anyType);
-            }
-            return anyType;
-        }
-        // Return the type implied by an object binding pattern
-        function getTypeFromObjectBindingPattern(pattern, includePatternInType) {
-            var members = {};
-            var hasComputedProperties = false;
-            ts.forEach(pattern.elements, function (e) {
-                var name = e.propertyName || e.name;
-                if (isComputedNonLiteralName(name)) {
-                    // do not include computed properties in the implied type
-                    hasComputedProperties = true;
-                    return;
-                }
-                var text = getTextOfPropertyName(name);
-                var flags = 4 /* Property */ | 67108864 /* Transient */ | (e.initializer ? 536870912 /* Optional */ : 0);
-                var symbol = createSymbol(flags, text);
-                symbol.type = getTypeFromBindingElement(e, includePatternInType);
-                symbol.bindingElement = e;
-                members[symbol.name] = symbol;
-            });
-            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined);
-            if (includePatternInType) {
-                result.pattern = pattern;
-            }
-            if (hasComputedProperties) {
-                result.flags |= 67108864 /* ObjectLiteralPatternWithComputedProperties */;
-            }
-            return result;
-        }
-        // Return the type implied by an array binding pattern
-        function getTypeFromArrayBindingPattern(pattern, includePatternInType) {
-            var elements = pattern.elements;
-            if (elements.length === 0 || elements[elements.length - 1].dotDotDotToken) {
-                return languageVersion >= 2 /* ES6 */ ? createIterableType(anyType) : anyArrayType;
-            }
-            // If the pattern has at least one element, and no rest element, then it should imply a tuple type.
-            var elementTypes = ts.map(elements, function (e) { return e.kind === 193 /* OmittedExpression */ ? anyType : getTypeFromBindingElement(e, includePatternInType); });
-            if (includePatternInType) {
-                var result = createNewTupleType(elementTypes);
-                result.pattern = pattern;
-                return result;
-            }
-            return createTupleType(elementTypes);
-        }
-        // Return the type implied by a binding pattern. This is the type implied purely by the binding pattern itself
-        // and without regard to its context (i.e. without regard any type annotation or initializer associated with the
-        // declaration in which the binding pattern is contained). For example, the implied type of [x, y] is [any, any]
-        // and the implied type of { x, y: z = 1 } is { x: any; y: number; }. The type implied by a binding pattern is
-        // used as the contextual type of an initializer associated with the binding pattern. Also, for a destructuring
-        // parameter with no type annotation or initializer, the type implied by the binding pattern becomes the type of
-        // the parameter.
-        function getTypeFromBindingPattern(pattern, includePatternInType) {
-            return pattern.kind === 167 /* ObjectBindingPattern */
-                ? getTypeFromObjectBindingPattern(pattern, includePatternInType)
-                : getTypeFromArrayBindingPattern(pattern, includePatternInType);
-        }
-        // Return the type associated with a variable, parameter, or property declaration. In the simple case this is the type
-        // specified in a type annotation or inferred from an initializer. However, in the case of a destructuring declaration it
-        // is a bit more involved. For example:
-        //
-        //   var [x, s = ""] = [1, "one"];
-        //
-        // Here, the array literal [1, "one"] is contextually typed by the type [any, string], which is the implied type of the
-        // binding pattern [x, s = ""]. Because the contextual type is a tuple type, the resulting type of [1, "one"] is the
-        // tuple type [number, string]. Thus, the type inferred for 'x' is number and the type inferred for 's' is string.
-        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
-            var type = getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
-            if (type) {
-                if (reportErrors) {
-                    reportErrorsFromWidening(declaration, type);
-                }
-                // During a normal type check we'll never get to here with a property assignment (the check of the containing
-                // object literal uses a different path). We exclude widening only so that language services and type verification
-                // tools see the actual type.
-                if (declaration.kind === 253 /* PropertyAssignment */) {
-                    return type;
-                }
-                return getWidenedType(type);
-            }
-            // Rest parameters default to type any[], other parameters default to type any
-            type = declaration.dotDotDotToken ? anyArrayType : anyType;
-            // Report implicit any errors unless this is a private property within an ambient declaration
-            if (reportErrors && compilerOptions.noImplicitAny) {
-                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
-                    reportImplicitAnyError(declaration, type);
-                }
-            }
-            return type;
-        }
-        function declarationBelongsToPrivateAmbientMember(declaration) {
-            var root = ts.getRootDeclaration(declaration);
-            var memberDeclaration = root.kind === 142 /* Parameter */ ? root.parent : root;
-            return isPrivateWithinAmbient(memberDeclaration);
-        }
-        function getTypeOfVariableOrParameterOrProperty(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                // Handle prototype property
-                if (symbol.flags & 134217728 /* Prototype */) {
-                    return links.type = getTypeOfPrototypeProperty(symbol);
-                }
-                // Handle catch clause variables
-                var declaration = symbol.valueDeclaration;
-                if (declaration.parent.kind === 252 /* CatchClause */) {
-                    return links.type = anyType;
-                }
-                // Handle export default expressions
-                if (declaration.kind === 235 /* ExportAssignment */) {
-                    return links.type = checkExpression(declaration.expression);
-                }
-                // Handle module.exports = expr
-                if (declaration.kind === 187 /* BinaryExpression */) {
-                    return links.type = getUnionType(ts.map(symbol.declarations, function (decl) { return checkExpressionCached(decl.right); }));
-                }
-                if (declaration.kind === 172 /* PropertyAccessExpression */) {
-                    // Declarations only exist for property access expressions for certain
-                    // special assignment kinds
-                    if (declaration.parent.kind === 187 /* BinaryExpression */) {
-                        // Handle exports.p = expr or this.p = expr or className.prototype.method = expr
-                        return links.type = checkExpressionCached(declaration.parent.right);
-                    }
-                }
-                // Handle variable, parameter or property
-                if (!pushTypeResolution(symbol, 0 /* Type */)) {
-                    return unknownType;
-                }
-                var type = getWidenedTypeForVariableLikeDeclaration(declaration, /*reportErrors*/ true);
-                if (!popTypeResolution()) {
-                    if (symbol.valueDeclaration.type) {
-                        // Variable has type annotation that circularly references the variable itself
-                        type = unknownType;
-                        error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
-                    }
-                    else {
-                        // Variable has initializer that circularly references the variable itself
-                        type = anyType;
-                        if (compilerOptions.noImplicitAny) {
-                            error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
-                        }
-                    }
-                }
-                links.type = type;
-            }
-            return links.type;
-        }
-        function getAnnotatedAccessorType(accessor) {
-            if (accessor) {
-                if (accessor.kind === 149 /* GetAccessor */) {
-                    return accessor.type && getTypeFromTypeNode(accessor.type);
-                }
-                else {
-                    var setterTypeAnnotation = ts.getSetAccessorTypeAnnotationNode(accessor);
-                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
-                }
-            }
-            return undefined;
-        }
-        function getAnnotatedAccessorThisType(accessor) {
-            if (accessor) {
-                var parameter = getAccessorThisParameter(accessor);
-                if (parameter && parameter.type) {
-                    return getTypeFromTypeNode(accessor.parameters[0].type);
-                }
-            }
-            return undefined;
-        }
-        function getTypeOfAccessors(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var getter = ts.getDeclarationOfKind(symbol, 149 /* GetAccessor */);
-                var setter = ts.getDeclarationOfKind(symbol, 150 /* SetAccessor */);
-                if (getter && getter.flags & 134217728 /* JavaScriptFile */) {
-                    var jsDocType = getTypeForVariableLikeDeclarationFromJSDocComment(getter);
-                    if (jsDocType) {
-                        return links.type = jsDocType;
-                    }
-                }
-                if (!pushTypeResolution(symbol, 0 /* Type */)) {
-                    return unknownType;
-                }
-                var type = void 0;
-                // First try to see if the user specified a return type on the get-accessor.
-                var getterReturnType = getAnnotatedAccessorType(getter);
-                if (getterReturnType) {
-                    type = getterReturnType;
-                }
-                else {
-                    // If the user didn't specify a return type, try to use the set-accessor's parameter type.
-                    var setterParameterType = getAnnotatedAccessorType(setter);
-                    if (setterParameterType) {
-                        type = setterParameterType;
-                    }
-                    else {
-                        // If there are no specified types, try to infer it from the body of the get accessor if it exists.
-                        if (getter && getter.body) {
-                            type = getReturnTypeFromBody(getter);
-                        }
-                        else {
-                            if (compilerOptions.noImplicitAny) {
-                                error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation, symbolToString(symbol));
-                            }
-                            type = anyType;
-                        }
-                    }
-                }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var getter_1 = ts.getDeclarationOfKind(symbol, 149 /* GetAccessor */);
-                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
-                    }
-                }
-                links.type = type;
-            }
-            return links.type;
-        }
-        function getTypeOfFuncClassEnumModule(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var type = createObjectType(65536 /* Anonymous */, symbol);
-                links.type = strictNullChecks && symbol.flags & 536870912 /* Optional */ ?
-                    addNullableKind(type, 32 /* Undefined */) : type;
-            }
-            return links.type;
-        }
-        function getTypeOfEnumMember(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
-            }
-            return links.type;
-        }
-        function getTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                var targetSymbol = resolveAlias(symbol);
-                // It only makes sense to get the type of a value symbol. If the result of resolving
-                // the alias is not a value, then it has no type. To get the type associated with a
-                // type symbol, call getDeclaredTypeOfSymbol.
-                // This check is important because without it, a call to getTypeOfSymbol could end
-                // up recursively calling getTypeOfAlias, causing a stack overflow.
-                links.type = targetSymbol.flags & 107455 /* Value */
-                    ? getTypeOfSymbol(targetSymbol)
-                    : unknownType;
-            }
-            return links.type;
-        }
-        function getTypeOfInstantiatedSymbol(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.type) {
-                links.type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
-            }
-            return links.type;
-        }
-        function getTypeOfSymbol(symbol) {
-            if (symbol.flags & 16777216 /* Instantiated */) {
-                return getTypeOfInstantiatedSymbol(symbol);
-            }
-            if (symbol.flags & (3 /* Variable */ | 4 /* Property */)) {
-                return getTypeOfVariableOrParameterOrProperty(symbol);
-            }
-            if (symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
-                return getTypeOfFuncClassEnumModule(symbol);
-            }
-            if (symbol.flags & 8 /* EnumMember */) {
-                return getTypeOfEnumMember(symbol);
-            }
-            if (symbol.flags & 98304 /* Accessor */) {
-                return getTypeOfAccessors(symbol);
-            }
-            if (symbol.flags & 8388608 /* Alias */) {
-                return getTypeOfAlias(symbol);
-            }
-            return unknownType;
-        }
-        function getTargetType(type) {
-            return type.flags & 4096 /* Reference */ ? type.target : type;
-        }
-        function hasBaseType(type, checkBase) {
-            return check(type);
-            function check(type) {
-                var target = getTargetType(type);
-                return target === checkBase || ts.forEach(getBaseTypes(target), check);
-            }
-        }
-        // Appends the type parameters given by a list of declarations to a set of type parameters and returns the resulting set.
-        // The function allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set
-        // in-place and returns the same array.
-        function appendTypeParameters(typeParameters, declarations) {
-            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
-                var declaration = declarations_2[_i];
-                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
-                if (!typeParameters) {
-                    typeParameters = [tp];
-                }
-                else if (!ts.contains(typeParameters, tp)) {
-                    typeParameters.push(tp);
-                }
-            }
-            return typeParameters;
-        }
-        // Appends the outer type parameters of a node to a set of type parameters and returns the resulting set. The function
-        // allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set in-place and
-        // returns the same array.
-        function appendOuterTypeParameters(typeParameters, node) {
-            while (true) {
-                node = node.parent;
-                if (!node) {
-                    return typeParameters;
-                }
-                if (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */ ||
-                    node.kind === 220 /* FunctionDeclaration */ || node.kind === 179 /* FunctionExpression */ ||
-                    node.kind === 147 /* MethodDeclaration */ || node.kind === 180 /* ArrowFunction */) {
-                    var declarations = node.typeParameters;
-                    if (declarations) {
-                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
-                    }
-                }
-            }
-        }
-        // The outer type parameters are those defined by enclosing generic classes, methods, or functions.
-        function getOuterTypeParametersOfClassOrInterface(symbol) {
-            var declaration = symbol.flags & 32 /* Class */ ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */);
-            return appendOuterTypeParameters(undefined, declaration);
-        }
-        // The local type parameters are the combined set of type parameters from all declarations of the class,
-        // interface, or type alias.
-        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
-            var result;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var node = _a[_i];
-                if (node.kind === 222 /* InterfaceDeclaration */ || node.kind === 221 /* ClassDeclaration */ ||
-                    node.kind === 192 /* ClassExpression */ || node.kind === 223 /* TypeAliasDeclaration */) {
-                    var declaration = node;
-                    if (declaration.typeParameters) {
-                        result = appendTypeParameters(result, declaration.typeParameters);
-                    }
-                }
-            }
-            return result;
-        }
-        // The full set of type parameters for a generic class or interface type consists of its outer type parameters plus
-        // its locally declared type parameters.
-        function getTypeParametersOfClassOrInterface(symbol) {
-            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
-        }
-        function isConstructorType(type) {
-            return type.flags & 80896 /* ObjectType */ && getSignaturesOfType(type, 1 /* Construct */).length > 0;
-        }
-        function getBaseTypeNodeOfClass(type) {
-            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
-        }
-        function getConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var typeArgCount = typeArgumentNodes ? typeArgumentNodes.length : 0;
-            return ts.filter(getSignaturesOfType(type, 1 /* Construct */), function (sig) { return (sig.typeParameters ? sig.typeParameters.length : 0) === typeArgCount; });
-        }
-        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes) {
-            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes);
-            if (typeArgumentNodes) {
-                var typeArguments_1 = ts.map(typeArgumentNodes, getTypeFromTypeNode);
-                signatures = ts.map(signatures, function (sig) { return getSignatureInstantiation(sig, typeArguments_1); });
-            }
-            return signatures;
-        }
-        // The base constructor of a class can resolve to
-        // undefinedType if the class has no extends clause,
-        // unknownType if an error occurred during resolution of the extends expression,
-        // nullType if the extends expression is the null value, or
-        // an object type with at least one construct signature.
-        function getBaseConstructorTypeOfClass(type) {
-            if (!type.resolvedBaseConstructorType) {
-                var baseTypeNode = getBaseTypeNodeOfClass(type);
-                if (!baseTypeNode) {
-                    return type.resolvedBaseConstructorType = undefinedType;
-                }
-                if (!pushTypeResolution(type, 1 /* ResolvedBaseConstructorType */)) {
-                    return unknownType;
-                }
-                var baseConstructorType = checkExpression(baseTypeNode.expression);
-                if (baseConstructorType.flags & 80896 /* ObjectType */) {
-                    // Resolving the members of a class requires us to resolve the base class of that class.
-                    // We force resolution here such that we catch circularities now.
-                    resolveStructuredTypeMembers(baseConstructorType);
-                }
-                if (!popTypeResolution()) {
-                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
-                    return type.resolvedBaseConstructorType = unknownType;
-                }
-                if (baseConstructorType !== unknownType && baseConstructorType !== nullType && !isConstructorType(baseConstructorType)) {
-                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
-                    return type.resolvedBaseConstructorType = unknownType;
-                }
-                type.resolvedBaseConstructorType = baseConstructorType;
-            }
-            return type.resolvedBaseConstructorType;
-        }
-        function getBaseTypes(type) {
-            var isClass = type.symbol.flags & 32 /* Class */;
-            var isInterface = type.symbol.flags & 64 /* Interface */;
-            if (!type.resolvedBaseTypes) {
-                if (!isClass && !isInterface) {
-                    ts.Debug.fail("type must be class or interface");
-                }
-                if (isClass) {
-                    resolveBaseTypesOfClass(type);
-                }
-                if (isInterface) {
-                    resolveBaseTypesOfInterface(type);
-                }
-            }
-            return type.resolvedBaseTypes;
-        }
-        function resolveBaseTypesOfClass(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            var baseConstructorType = getBaseConstructorTypeOfClass(type);
-            if (!(baseConstructorType.flags & 80896 /* ObjectType */)) {
-                return;
-            }
-            var baseTypeNode = getBaseTypeNodeOfClass(type);
-            var baseType;
-            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
-            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 /* Class */ &&
-                areAllOuterTypeParametersApplied(originalBaseType)) {
-                // When base constructor type is a class with no captured type arguments we know that the constructors all have the same type parameters as the
-                // class and all return the instance type of the class. There is no need for further checks and we can apply the
-                // type arguments in the same manner as a type reference to get the same error reporting experience.
-                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol);
-            }
-            else {
-                // The class derives from a "class-like" constructor function, check that we have at least one construct signature
-                // with a matching number of type parameters and use the return type of the first instantiated signature. Elsewhere
-                // we check that all instantiated signatures return the same type.
-                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments);
-                if (!constructors.length) {
-                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
-                    return;
-                }
-                baseType = getReturnTypeOfSignature(constructors[0]);
-            }
-            if (baseType === unknownType) {
-                return;
-            }
-            if (!(getTargetType(baseType).flags & (1024 /* Class */ | 2048 /* Interface */))) {
-                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
-                return;
-            }
-            if (type === baseType || hasBaseType(baseType, type)) {
-                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
-                return;
-            }
-            if (type.resolvedBaseTypes === emptyArray) {
-                type.resolvedBaseTypes = [baseType];
-            }
-            else {
-                type.resolvedBaseTypes.push(baseType);
-            }
-        }
-        function areAllOuterTypeParametersApplied(type) {
-            // An unapplied type parameter has its symbol still the same as the matching argument symbol.
-            // Since parameters are applied outer-to-inner, only the last outer parameter needs to be checked.
-            var outerTypeParameters = type.outerTypeParameters;
-            if (outerTypeParameters) {
-                var last = outerTypeParameters.length - 1;
-                var typeArguments = type.typeArguments;
-                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
-            }
-            return true;
-        }
-        function resolveBaseTypesOfInterface(type) {
-            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
-            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222 /* InterfaceDeclaration */ && ts.getInterfaceBaseTypeNodes(declaration)) {
-                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
-                        var node = _c[_b];
-                        var baseType = getTypeFromTypeNode(node);
-                        if (baseType !== unknownType) {
-                            if (getTargetType(baseType).flags & (1024 /* Class */ | 2048 /* Interface */)) {
-                                if (type !== baseType && !hasBaseType(baseType, type)) {
-                                    if (type.resolvedBaseTypes === emptyArray) {
-                                        type.resolvedBaseTypes = [baseType];
-                                    }
-                                    else {
-                                        type.resolvedBaseTypes.push(baseType);
-                                    }
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
-                                }
-                            }
-                            else {
-                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        // Returns true if the interface given by the symbol is free of "this" references. Specifically, the result is
-        // true if the interface itself contains no references to "this" in its body, if all base types are interfaces,
-        // and if none of the base interfaces have a "this" type.
-        function isIndependentInterface(symbol) {
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 222 /* InterfaceDeclaration */) {
-                    if (declaration.flags & 16384 /* ContainsThis */) {
-                        return false;
-                    }
-                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
-                    if (baseTypeNodes) {
-                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
-                            var node = baseTypeNodes_1[_b];
-                            if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                                var baseSymbol = resolveEntityName(node.expression, 793056 /* Type */, /*ignoreErrors*/ true);
-                                if (!baseSymbol || !(baseSymbol.flags & 64 /* Interface */) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
-                                    return false;
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            return true;
-        }
-        function getDeclaredTypeOfClassOrInterface(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var kind = symbol.flags & 32 /* Class */ ? 1024 /* Class */ : 2048 /* Interface */;
-                var type = links.declaredType = createObjectType(kind, symbol);
-                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
-                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                // A class or interface is generic if it has type parameters or a "this" type. We always give classes a "this" type
-                // because it is not feasible to analyze all members to determine if the "this" type escapes the class (in particular,
-                // property types inferred from initializers and method return types inferred from return statements are very hard
-                // to exhaustively analyze). We give interfaces a "this" type if we can't definitely determine that they are free of
-                // "this" references.
-                if (outerTypeParameters || localTypeParameters || kind === 1024 /* Class */ || !isIndependentInterface(symbol)) {
-                    type.flags |= 4096 /* Reference */;
-                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
-                    type.outerTypeParameters = outerTypeParameters;
-                    type.localTypeParameters = localTypeParameters;
-                    type.instantiations = {};
-                    type.instantiations[getTypeListId(type.typeParameters)] = type;
-                    type.target = type;
-                    type.typeArguments = type.typeParameters;
-                    type.thisType = createType(512 /* TypeParameter */ | 33554432 /* ThisType */);
-                    type.thisType.symbol = symbol;
-                    type.thisType.constraint = type;
-                }
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfTypeAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                // Note that we use the links object as the target here because the symbol object is used as the unique
-                // identity for resolution of the 'type' property in SymbolLinks.
-                if (!pushTypeResolution(symbol, 2 /* DeclaredType */)) {
-                    return unknownType;
-                }
-                var declaration = ts.getDeclarationOfKind(symbol, 223 /* TypeAliasDeclaration */);
-                var type = getTypeFromTypeNode(declaration.type);
-                if (popTypeResolution()) {
-                    links.typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
-                    if (links.typeParameters) {
-                        // Initialize the instantiation cache for generic type aliases. The declared type corresponds to
-                        // an instantiation of the type alias with the type parameters supplied as type arguments.
-                        links.instantiations = {};
-                        links.instantiations[getTypeListId(links.typeParameters)] = type;
-                    }
-                }
-                else {
-                    type = unknownType;
-                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
-                }
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfEnum(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var type = createType(128 /* Enum */);
-                type.symbol = symbol;
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfTypeParameter(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                var type = createType(512 /* TypeParameter */);
-                type.symbol = symbol;
-                if (!ts.getDeclarationOfKind(symbol, 141 /* TypeParameter */).constraint) {
-                    type.constraint = noConstraintType;
-                }
-                links.declaredType = type;
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfAlias(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.declaredType) {
-                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
-            }
-            return links.declaredType;
-        }
-        function getDeclaredTypeOfSymbol(symbol) {
-            ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0);
-            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
-                return getDeclaredTypeOfClassOrInterface(symbol);
-            }
-            if (symbol.flags & 524288 /* TypeAlias */) {
-                return getDeclaredTypeOfTypeAlias(symbol);
-            }
-            if (symbol.flags & 384 /* Enum */) {
-                return getDeclaredTypeOfEnum(symbol);
-            }
-            if (symbol.flags & 262144 /* TypeParameter */) {
-                return getDeclaredTypeOfTypeParameter(symbol);
-            }
-            if (symbol.flags & 8388608 /* Alias */) {
-                return getDeclaredTypeOfAlias(symbol);
-            }
-            return unknownType;
-        }
-        // A type reference is considered independent if each type argument is considered independent.
-        function isIndependentTypeReference(node) {
-            if (node.typeArguments) {
-                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
-                    var typeNode = _a[_i];
-                    if (!isIndependentType(typeNode)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        // A type is considered independent if it the any, string, number, boolean, symbol, or void keyword, a string
-        // literal type, an array with an element type that is considered independent, or a type reference that is
-        // considered independent.
-        function isIndependentType(node) {
-            switch (node.kind) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 103 /* VoidKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 93 /* NullKeyword */:
-                case 127 /* NeverKeyword */:
-                case 166 /* StringLiteralType */:
-                    return true;
-                case 160 /* ArrayType */:
-                    return isIndependentType(node.elementType);
-                case 155 /* TypeReference */:
-                    return isIndependentTypeReference(node);
-            }
-            return false;
-        }
-        // A variable-like declaration is considered independent (free of this references) if it has a type annotation
-        // that specifies an independent type, or if it has no type annotation and no initializer (and thus of type any).
-        function isIndependentVariableLikeDeclaration(node) {
-            return node.type && isIndependentType(node.type) || !node.type && !node.initializer;
-        }
-        // A function-like declaration is considered independent (free of this references) if it has a return type
-        // annotation that is considered independent and if each parameter is considered independent.
-        function isIndependentFunctionLikeDeclaration(node) {
-            if (node.kind !== 148 /* Constructor */ && (!node.type || !isIndependentType(node.type))) {
-                return false;
-            }
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                if (!isIndependentVariableLikeDeclaration(parameter)) {
-                    return false;
-                }
-            }
-            return true;
-        }
-        // Returns true if the class or interface member given by the symbol is free of "this" references. The
-        // function may return false for symbols that are actually free of "this" references because it is not
-        // feasible to perform a complete analysis in all cases. In particular, property members with types
-        // inferred from their initializers and function members with inferred return types are conservatively
-        // assumed not to be free of "this" references.
-        function isIndependentMember(symbol) {
-            if (symbol.declarations && symbol.declarations.length === 1) {
-                var declaration = symbol.declarations[0];
-                if (declaration) {
-                    switch (declaration.kind) {
-                        case 145 /* PropertyDeclaration */:
-                        case 144 /* PropertySignature */:
-                            return isIndependentVariableLikeDeclaration(declaration);
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 148 /* Constructor */:
-                            return isIndependentFunctionLikeDeclaration(declaration);
-                    }
-                }
-            }
-            return false;
-        }
-        function createSymbolTable(symbols) {
-            var result = {};
-            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
-                var symbol = symbols_1[_i];
-                result[symbol.name] = symbol;
-            }
-            return result;
-        }
-        // The mappingThisOnly flag indicates that the only type parameter being mapped is "this". When the flag is true,
-        // we check symbols to see if we can quickly conclude they are free of "this" references, thus needing no instantiation.
-        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
-            var result = {};
-            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
-                var symbol = symbols_2[_i];
-                result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper);
-            }
-            return result;
-        }
-        function addInheritedMembers(symbols, baseSymbols) {
-            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
-                var s = baseSymbols_1[_i];
-                if (!ts.hasProperty(symbols, s.name)) {
-                    symbols[s.name] = s;
-                }
-            }
-        }
-        function resolveDeclaredMembers(type) {
-            if (!type.declaredProperties) {
-                var symbol = type.symbol;
-                type.declaredProperties = getNamedMembers(symbol.members);
-                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members["__call"]);
-                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members["__new"]);
-                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
-                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
-            }
-            return type;
-        }
-        function getTypeWithThisArgument(type, thisArgument) {
-            if (type.flags & 4096 /* Reference */) {
-                return createTypeReference(type.target, ts.concatenate(type.typeArguments, [thisArgument || type.target.thisType]));
-            }
-            return type;
-        }
-        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
-            var mapper = identityMapper;
-            var members = source.symbol.members;
-            var callSignatures = source.declaredCallSignatures;
-            var constructSignatures = source.declaredConstructSignatures;
-            var stringIndexInfo = source.declaredStringIndexInfo;
-            var numberIndexInfo = source.declaredNumberIndexInfo;
-            if (!ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
-                mapper = createTypeMapper(typeParameters, typeArguments);
-                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, /*mappingThisOnly*/ typeParameters.length === 1);
-                callSignatures = instantiateList(source.declaredCallSignatures, mapper, instantiateSignature);
-                constructSignatures = instantiateList(source.declaredConstructSignatures, mapper, instantiateSignature);
-                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
-                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
-            }
-            var baseTypes = getBaseTypes(source);
-            if (baseTypes.length) {
-                if (members === source.symbol.members) {
-                    members = createSymbolTable(source.declaredProperties);
-                }
-                var thisArgument = ts.lastOrUndefined(typeArguments);
-                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
-                    var baseType = baseTypes_1[_i];
-                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
-                    addInheritedMembers(members, getPropertiesOfObjectType(instantiatedBaseType));
-                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0 /* Call */));
-                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1 /* Construct */));
-                    stringIndexInfo = stringIndexInfo || getIndexInfoOfType(instantiatedBaseType, 0 /* String */);
-                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1 /* Number */);
-                }
-            }
-            setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function resolveClassOrInterfaceMembers(type) {
-            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
-        }
-        function resolveTypeReferenceMembers(type) {
-            var source = resolveDeclaredMembers(type.target);
-            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
-            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
-                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
-            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
-        }
-        function createSignature(declaration, typeParameters, thisType, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasStringLiterals) {
-            var sig = new Signature(checker);
-            sig.declaration = declaration;
-            sig.typeParameters = typeParameters;
-            sig.parameters = parameters;
-            sig.thisType = thisType;
-            sig.resolvedReturnType = resolvedReturnType;
-            sig.typePredicate = typePredicate;
-            sig.minArgumentCount = minArgumentCount;
-            sig.hasRestParameter = hasRestParameter;
-            sig.hasStringLiterals = hasStringLiterals;
-            return sig;
-        }
-        function cloneSignature(sig) {
-            return createSignature(sig.declaration, sig.typeParameters, sig.thisType, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasStringLiterals);
-        }
-        function getDefaultConstructSignatures(classType) {
-            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-            var baseSignatures = getSignaturesOfType(baseConstructorType, 1 /* Construct */);
-            if (baseSignatures.length === 0) {
-                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasStringLiterals*/ false)];
-            }
-            var baseTypeNode = getBaseTypeNodeOfClass(classType);
-            var typeArguments = ts.map(baseTypeNode.typeArguments, getTypeFromTypeNode);
-            var typeArgCount = typeArguments ? typeArguments.length : 0;
-            var result = [];
-            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
-                var baseSig = baseSignatures_1[_i];
-                var typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
-                if (typeParamCount === typeArgCount) {
-                    var sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
-                    sig.typeParameters = classType.localTypeParameters;
-                    sig.resolvedReturnType = classType;
-                    result.push(sig);
-                }
-            }
-            return result;
-        }
-        function createTupleTypeMemberSymbols(memberTypes) {
-            var members = {};
-            for (var i = 0; i < memberTypes.length; i++) {
-                var symbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "" + i);
-                symbol.type = memberTypes[i];
-                members[i] = symbol;
-            }
-            return members;
-        }
-        function resolveTupleTypeMembers(type) {
-            var arrayElementType = getUnionType(type.elementTypes, /*noSubtypeReduction*/ true);
-            // Make the tuple type itself the 'this' type by including an extra type argument
-            var arrayType = resolveStructuredTypeMembers(createTypeFromGenericGlobalType(globalArrayType, [arrayElementType, type]));
-            var members = createTupleTypeMemberSymbols(type.elementTypes);
-            addInheritedMembers(members, arrayType.properties);
-            setObjectTypeMembers(type, members, arrayType.callSignatures, arrayType.constructSignatures, arrayType.stringIndexInfo, arrayType.numberIndexInfo);
-        }
-        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
-            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
-                var s = signatureList_1[_i];
-                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
-                    return s;
-                }
-            }
-        }
-        function findMatchingSignatures(signatureLists, signature, listIndex) {
-            if (signature.typeParameters) {
-                // We require an exact match for generic signatures, so we only return signatures from the first
-                // signature list and only if they have exact matches in the other signature lists.
-                if (listIndex > 0) {
-                    return undefined;
-                }
-                for (var i = 1; i < signatureLists.length; i++) {
-                    if (!findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false)) {
-                        return undefined;
-                    }
-                }
-                return [signature];
-            }
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                // Allow matching non-generic signatures to have excess parameters and different return types
-                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ true, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true);
-                if (!match) {
-                    return undefined;
-                }
-                if (!ts.contains(result, match)) {
-                    (result || (result = [])).push(match);
-                }
-            }
-            return result;
-        }
-        // The signatures of a union type are those signatures that are present in each of the constituent types.
-        // Generic signatures must match exactly, but non-generic signatures are allowed to have extra optional
-        // parameters and may differ in return types. When signatures differ in return types, the resulting return
-        // type is the union of the constituent return types.
-        function getUnionSignatures(types, kind) {
-            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
-            var result = undefined;
-            for (var i = 0; i < signatureLists.length; i++) {
-                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
-                    var signature = _a[_i];
-                    // Only process signatures with parameter lists that aren't already in the result list
-                    if (!result || !findMatchingSignature(result, signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true)) {
-                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
-                        if (unionSignatures) {
-                            var s = signature;
-                            // Union the result types when more than one signature matches
-                            if (unionSignatures.length > 1) {
-                                s = cloneSignature(signature);
-                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisType; })) {
-                                    s.thisType = getUnionType(ts.map(unionSignatures, function (sig) { return sig.thisType || anyType; }));
-                                }
-                                // Clear resolved return type we possibly got from cloneSignature
-                                s.resolvedReturnType = undefined;
-                                s.unionSignatures = unionSignatures;
-                            }
-                            (result || (result = [])).push(s);
-                        }
-                    }
-                }
-            }
-            return result || emptyArray;
-        }
-        function getUnionIndexInfo(types, kind) {
-            var indexTypes = [];
-            var isAnyReadonly = false;
-            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
-                var type = types_1[_i];
-                var indexInfo = getIndexInfoOfType(type, kind);
-                if (!indexInfo) {
-                    return undefined;
-                }
-                indexTypes.push(indexInfo.type);
-                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
-            }
-            return createIndexInfo(getUnionType(indexTypes), isAnyReadonly);
-        }
-        function resolveUnionTypeMembers(type) {
-            // The members and properties collections are empty for union types. To get all properties of a union
-            // type use getPropertiesOfType (only the language service uses this).
-            var callSignatures = getUnionSignatures(type.types, 0 /* Call */);
-            var constructSignatures = getUnionSignatures(type.types, 1 /* Construct */);
-            var stringIndexInfo = getUnionIndexInfo(type.types, 0 /* String */);
-            var numberIndexInfo = getUnionIndexInfo(type.types, 1 /* Number */);
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function intersectTypes(type1, type2) {
-            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
-        }
-        function intersectIndexInfos(info1, info2) {
-            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
-        }
-        function resolveIntersectionTypeMembers(type) {
-            // The members and properties collections are empty for intersection types. To get all properties of an
-            // intersection type use getPropertiesOfType (only the language service uses this).
-            var callSignatures = emptyArray;
-            var constructSignatures = emptyArray;
-            var stringIndexInfo = undefined;
-            var numberIndexInfo = undefined;
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0 /* Call */));
-                constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(t, 1 /* Construct */));
-                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0 /* String */));
-                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1 /* Number */));
-            }
-            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-        }
-        function resolveAnonymousTypeMembers(type) {
-            var symbol = type.symbol;
-            if (type.target) {
-                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, /*mappingThisOnly*/ false);
-                var callSignatures = instantiateList(getSignaturesOfType(type.target, 0 /* Call */), type.mapper, instantiateSignature);
-                var constructSignatures = instantiateList(getSignaturesOfType(type.target, 1 /* Construct */), type.mapper, instantiateSignature);
-                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0 /* String */), type.mapper);
-                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1 /* Number */), type.mapper);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-            }
-            else if (symbol.flags & 2048 /* TypeLiteral */) {
-                var members = symbol.members;
-                var callSignatures = getSignaturesOfSymbol(members["__call"]);
-                var constructSignatures = getSignaturesOfSymbol(members["__new"]);
-                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
-                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
-                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
-            }
-            else {
-                // Combinations of function, class, enum and module
-                var members = emptySymbols;
-                var constructSignatures = emptyArray;
-                if (symbol.flags & 1952 /* HasExports */) {
-                    members = getExportsOfSymbol(symbol);
-                }
-                if (symbol.flags & 32 /* Class */) {
-                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
-                    constructSignatures = getSignaturesOfSymbol(symbol.members["__constructor"]);
-                    if (!constructSignatures.length) {
-                        constructSignatures = getDefaultConstructSignatures(classType);
-                    }
-                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
-                    if (baseConstructorType.flags & 80896 /* ObjectType */) {
-                        members = createSymbolTable(getNamedMembers(members));
-                        addInheritedMembers(members, getPropertiesOfObjectType(baseConstructorType));
-                    }
-                }
-                var numberIndexInfo = symbol.flags & 384 /* Enum */ ? enumNumberIndexInfo : undefined;
-                setObjectTypeMembers(type, members, emptyArray, constructSignatures, undefined, numberIndexInfo);
-                // We resolve the members before computing the signatures because a signature may use
-                // typeof with a qualified name expression that circularly references the type we are
-                // in the process of resolving (see issue #6072). The temporarily empty signature list
-                // will never be observed because a qualified name can't reference signatures.
-                if (symbol.flags & (16 /* Function */ | 8192 /* Method */)) {
-                    type.callSignatures = getSignaturesOfSymbol(symbol);
-                }
-            }
-        }
-        function resolveStructuredTypeMembers(type) {
-            if (!type.members) {
-                if (type.flags & 4096 /* Reference */) {
-                    resolveTypeReferenceMembers(type);
-                }
-                else if (type.flags & (1024 /* Class */ | 2048 /* Interface */)) {
-                    resolveClassOrInterfaceMembers(type);
-                }
-                else if (type.flags & 65536 /* Anonymous */) {
-                    resolveAnonymousTypeMembers(type);
-                }
-                else if (type.flags & 8192 /* Tuple */) {
-                    resolveTupleTypeMembers(type);
-                }
-                else if (type.flags & 16384 /* Union */) {
-                    resolveUnionTypeMembers(type);
-                }
-                else if (type.flags & 32768 /* Intersection */) {
-                    resolveIntersectionTypeMembers(type);
-                }
-            }
-            return type;
-        }
-        /** Return properties of an object type or an empty array for other types */
-        function getPropertiesOfObjectType(type) {
-            if (type.flags & 80896 /* ObjectType */) {
-                return resolveStructuredTypeMembers(type).properties;
-            }
-            return emptyArray;
-        }
-        /** If the given type is an object type and that type has a property by the given name,
-         * return the symbol for that property. Otherwise return undefined. */
-        function getPropertyOfObjectType(type, name) {
-            if (type.flags & 80896 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (ts.hasProperty(resolved.members, name)) {
-                    var symbol = resolved.members[name];
-                    if (symbolIsValue(symbol)) {
-                        return symbol;
-                    }
-                }
-            }
-        }
-        function getPropertiesOfUnionOrIntersectionType(type) {
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var current = _a[_i];
-                for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    getPropertyOfUnionOrIntersectionType(type, prop.name);
-                }
-                // The properties of a union type are those that are present in all constituent types, so
-                // we only need to check the properties of the first type
-                if (type.flags & 16384 /* Union */) {
-                    break;
-                }
-            }
-            return type.resolvedProperties ? symbolsToArray(type.resolvedProperties) : emptyArray;
-        }
-        function getPropertiesOfType(type) {
-            type = getApparentType(type);
-            return type.flags & 49152 /* UnionOrIntersection */ ? getPropertiesOfUnionOrIntersectionType(type) : getPropertiesOfObjectType(type);
-        }
-        /**
-         * The apparent type of a type parameter is the base constraint instantiated with the type parameter
-         * as the type argument for the 'this' type.
-         */
-        function getApparentTypeOfTypeParameter(type) {
-            if (!type.resolvedApparentType) {
-                var constraintType = getConstraintOfTypeParameter(type);
-                while (constraintType && constraintType.flags & 512 /* TypeParameter */) {
-                    constraintType = getConstraintOfTypeParameter(constraintType);
-                }
-                type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type);
-            }
-            return type.resolvedApparentType;
-        }
-        /**
-         * For a type parameter, return the base constraint of the type parameter. For the string, number,
-         * boolean, and symbol primitive types, return the corresponding object types. Otherwise return the
-         * type itself. Note that the apparent type of a union type is the union type itself.
-         */
-        function getApparentType(type) {
-            if (type.flags & 512 /* TypeParameter */) {
-                type = getApparentTypeOfTypeParameter(type);
-            }
-            if (type.flags & 258 /* StringLike */) {
-                type = globalStringType;
-            }
-            else if (type.flags & 132 /* NumberLike */) {
-                type = globalNumberType;
-            }
-            else if (type.flags & 8 /* Boolean */) {
-                type = globalBooleanType;
-            }
-            else if (type.flags & 16777216 /* ESSymbol */) {
-                type = getGlobalESSymbolType();
-            }
-            return type;
-        }
-        function createUnionOrIntersectionProperty(containingType, name) {
-            var types = containingType.types;
-            var props;
-            // Flags we want to propagate to the result if they exist in all source symbols
-            var commonFlags = (containingType.flags & 32768 /* Intersection */) ? 536870912 /* Optional */ : 0 /* None */;
-            for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
-                var current = types_2[_i];
-                var type = getApparentType(current);
-                if (type !== unknownType) {
-                    var prop = getPropertyOfType(type, name);
-                    if (prop && !(getDeclarationFlagsFromSymbol(prop) & (8 /* Private */ | 16 /* Protected */))) {
-                        commonFlags &= prop.flags;
-                        if (!props) {
-                            props = [prop];
-                        }
-                        else if (!ts.contains(props, prop)) {
-                            props.push(prop);
-                        }
-                    }
-                    else if (containingType.flags & 16384 /* Union */) {
-                        // A union type requires the property to be present in all constituent types
-                        return undefined;
-                    }
-                }
-            }
-            if (!props) {
-                return undefined;
-            }
-            if (props.length === 1) {
-                return props[0];
-            }
-            var propTypes = [];
-            var declarations = [];
-            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
-                var prop = props_1[_a];
-                if (prop.declarations) {
-                    ts.addRange(declarations, prop.declarations);
-                }
-                propTypes.push(getTypeOfSymbol(prop));
-            }
-            var result = createSymbol(4 /* Property */ |
-                67108864 /* Transient */ |
-                268435456 /* SyntheticProperty */ |
-                commonFlags, name);
-            result.containingType = containingType;
-            result.declarations = declarations;
-            result.type = containingType.flags & 16384 /* Union */ ? getUnionType(propTypes) : getIntersectionType(propTypes);
-            return result;
-        }
-        function getPropertyOfUnionOrIntersectionType(type, name) {
-            var properties = type.resolvedProperties || (type.resolvedProperties = {});
-            if (ts.hasProperty(properties, name)) {
-                return properties[name];
-            }
-            var property = createUnionOrIntersectionProperty(type, name);
-            if (property) {
-                properties[name] = property;
-            }
-            return property;
-        }
-        // Return the symbol for the property with the given name in the given type. Creates synthetic union properties when
-        // necessary, maps primitive types and type parameters are to their apparent types, and augments with properties from
-        // Object and Function as appropriate.
-        function getPropertyOfType(type, name) {
-            type = getApparentType(type);
-            if (type.flags & 80896 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (ts.hasProperty(resolved.members, name)) {
-                    var symbol = resolved.members[name];
-                    if (symbolIsValue(symbol)) {
-                        return symbol;
-                    }
-                }
-                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
-                    var symbol = getPropertyOfObjectType(globalFunctionType, name);
-                    if (symbol) {
-                        return symbol;
-                    }
-                }
-                return getPropertyOfObjectType(globalObjectType, name);
-            }
-            if (type.flags & 49152 /* UnionOrIntersection */) {
-                return getPropertyOfUnionOrIntersectionType(type, name);
-            }
-            return undefined;
-        }
-        function getSignaturesOfStructuredType(type, kind) {
-            if (type.flags & 130048 /* StructuredType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 /* Call */ ? resolved.callSignatures : resolved.constructSignatures;
-            }
-            return emptyArray;
-        }
-        /**
-         * Return the signatures of the given kind in the given type. Creates synthetic union signatures when necessary and
-         * maps primitive types and type parameters are to their apparent types.
-         */
-        function getSignaturesOfType(type, kind) {
-            return getSignaturesOfStructuredType(getApparentType(type), kind);
-        }
-        function getIndexInfoOfStructuredType(type, kind) {
-            if (type.flags & 130048 /* StructuredType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return kind === 0 /* String */ ? resolved.stringIndexInfo : resolved.numberIndexInfo;
-            }
-        }
-        function getIndexTypeOfStructuredType(type, kind) {
-            var info = getIndexInfoOfStructuredType(type, kind);
-            return info && info.type;
-        }
-        // Return the indexing info of the given kind in the given type. Creates synthetic union index types when necessary and
-        // maps primitive types and type parameters are to their apparent types.
-        function getIndexInfoOfType(type, kind) {
-            return getIndexInfoOfStructuredType(getApparentType(type), kind);
-        }
-        // Return the index type of the given kind in the given type. Creates synthetic union index types when necessary and
-        // maps primitive types and type parameters are to their apparent types.
-        function getIndexTypeOfType(type, kind) {
-            return getIndexTypeOfStructuredType(getApparentType(type), kind);
-        }
-        function getImplicitIndexTypeOfType(type, kind) {
-            if (isObjectLiteralType(type)) {
-                var propTypes = [];
-                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
-                        propTypes.push(getTypeOfSymbol(prop));
-                    }
-                }
-                if (propTypes.length) {
-                    return getUnionType(propTypes);
-                }
-            }
-            return undefined;
-        }
-        function getTypeParametersFromJSDocTemplate(declaration) {
-            if (declaration.flags & 134217728 /* JavaScriptFile */) {
-                var templateTag = ts.getJSDocTemplateTag(declaration);
-                if (templateTag) {
-                    return getTypeParametersFromDeclaration(templateTag.typeParameters);
-                }
-            }
-            return undefined;
-        }
-        // Return list of type parameters with duplicates removed (duplicate identifier errors are generated in the actual
-        // type checking functions).
-        function getTypeParametersFromDeclaration(typeParameterDeclarations) {
-            var result = [];
-            ts.forEach(typeParameterDeclarations, function (node) {
-                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
-                if (!ts.contains(result, tp)) {
-                    result.push(tp);
-                }
-            });
-            return result;
-        }
-        function symbolsToArray(symbols) {
-            var result = [];
-            for (var id in symbols) {
-                if (!isReservedMemberName(id)) {
-                    result.push(symbols[id]);
-                }
-            }
-            return result;
-        }
-        function isOptionalParameter(node) {
-            if (node.flags & 134217728 /* JavaScriptFile */) {
-                if (node.type && node.type.kind === 268 /* JSDocOptionalType */) {
-                    return true;
-                }
-                var paramTag = ts.getCorrespondingJSDocParameterTag(node);
-                if (paramTag) {
-                    if (paramTag.isBracketed) {
-                        return true;
-                    }
-                    if (paramTag.typeExpression) {
-                        return paramTag.typeExpression.type.kind === 268 /* JSDocOptionalType */;
-                    }
-                }
-            }
-            if (ts.hasQuestionToken(node)) {
-                return true;
-            }
-            if (node.initializer) {
-                var signatureDeclaration = node.parent;
-                var signature = getSignatureFromDeclaration(signatureDeclaration);
-                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
-                ts.Debug.assert(parameterIndex >= 0);
-                return parameterIndex >= signature.minArgumentCount;
-            }
-            return false;
-        }
-        function createTypePredicateFromTypePredicateNode(node) {
-            if (node.parameterName.kind === 69 /* Identifier */) {
-                var parameterName = node.parameterName;
-                return {
-                    kind: 1 /* Identifier */,
-                    parameterName: parameterName ? parameterName.text : undefined,
-                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
-                    type: getTypeFromTypeNode(node.type)
-                };
-            }
-            else {
-                return {
-                    kind: 0 /* This */,
-                    type: getTypeFromTypeNode(node.type)
-                };
-            }
-        }
-        function getSignatureFromDeclaration(declaration) {
-            var links = getNodeLinks(declaration);
-            if (!links.resolvedSignature) {
-                var parameters = [];
-                var hasStringLiterals = false;
-                var minArgumentCount = -1;
-                var thisType = undefined;
-                var hasThisParameter = void 0;
-                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
-                // If this is a JSDoc construct signature, then skip the first parameter in the
-                // parameter list.  The first parameter represents the return type of the construct
-                // signature.
-                for (var i = isJSConstructSignature ? 1 : 0, n = declaration.parameters.length; i < n; i++) {
-                    var param = declaration.parameters[i];
-                    var paramSymbol = param.symbol;
-                    // Include parameter symbol instead of property symbol in the signature
-                    if (paramSymbol && !!(paramSymbol.flags & 4 /* Property */) && !ts.isBindingPattern(param.name)) {
-                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455 /* Value */, undefined, undefined);
-                        paramSymbol = resolvedSymbol;
-                    }
-                    if (i === 0 && paramSymbol.name === "this") {
-                        hasThisParameter = true;
-                        thisType = param.type ? getTypeFromTypeNode(param.type) : unknownType;
-                    }
-                    else {
-                        parameters.push(paramSymbol);
-                    }
-                    if (param.type && param.type.kind === 166 /* StringLiteralType */) {
-                        hasStringLiterals = true;
-                    }
-                    if (param.initializer || param.questionToken || param.dotDotDotToken) {
-                        if (minArgumentCount < 0) {
-                            minArgumentCount = i - (hasThisParameter ? 1 : 0);
-                        }
-                    }
-                    else {
-                        // If we see any required parameters, it means the prior ones were not in fact optional.
-                        minArgumentCount = -1;
-                    }
-                }
-                // If only one accessor includes a this-type annotation, the other behaves as if it had the same type annotation
-                if ((declaration.kind === 149 /* GetAccessor */ || declaration.kind === 150 /* SetAccessor */) &&
-                    !ts.hasDynamicName(declaration) &&
-                    (!hasThisParameter || thisType === unknownType)) {
-                    var otherKind = declaration.kind === 149 /* GetAccessor */ ? 150 /* SetAccessor */ : 149 /* GetAccessor */;
-                    var setter = ts.getDeclarationOfKind(declaration.symbol, otherKind);
-                    thisType = getAnnotatedAccessorThisType(setter);
-                }
-                if (minArgumentCount < 0) {
-                    minArgumentCount = declaration.parameters.length - (hasThisParameter ? 1 : 0);
-                }
-                if (isJSConstructSignature) {
-                    minArgumentCount--;
-                }
-                var classType = declaration.kind === 148 /* Constructor */ ?
-                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
-                    : undefined;
-                var typeParameters = classType ? classType.localTypeParameters :
-                    declaration.typeParameters ? getTypeParametersFromDeclaration(declaration.typeParameters) :
-                        getTypeParametersFromJSDocTemplate(declaration);
-                var returnType = getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType);
-                var typePredicate = declaration.type && declaration.type.kind === 154 /* TypePredicate */ ?
-                    createTypePredicateFromTypePredicateNode(declaration.type) :
-                    undefined;
-                links.resolvedSignature = createSignature(declaration, typeParameters, thisType, parameters, returnType, typePredicate, minArgumentCount, ts.hasRestParameter(declaration), hasStringLiterals);
-            }
-            return links.resolvedSignature;
-        }
-        function getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType) {
-            if (isJSConstructSignature) {
-                return getTypeFromTypeNode(declaration.parameters[0].type);
-            }
-            else if (classType) {
-                return classType;
-            }
-            else if (declaration.type) {
-                return getTypeFromTypeNode(declaration.type);
-            }
-            if (declaration.flags & 134217728 /* JavaScriptFile */) {
-                var type = getReturnTypeFromJSDocComment(declaration);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            // TypeScript 1.0 spec (April 2014):
-            // If only one accessor includes a type annotation, the other behaves as if it had the same type annotation.
-            if (declaration.kind === 149 /* GetAccessor */ && !ts.hasDynamicName(declaration)) {
-                var setter = ts.getDeclarationOfKind(declaration.symbol, 150 /* SetAccessor */);
-                return getAnnotatedAccessorType(setter);
-            }
-            if (ts.nodeIsMissing(declaration.body)) {
-                return anyType;
-            }
-        }
-        function getSignaturesOfSymbol(symbol) {
-            if (!symbol)
-                return emptyArray;
-            var result = [];
-            for (var i = 0, len = symbol.declarations.length; i < len; i++) {
-                var node = symbol.declarations[i];
-                switch (node.kind) {
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 269 /* JSDocFunctionType */:
-                        // Don't include signature if node is the implementation of an overloaded function. A node is considered
-                        // an implementation node if it has a body and the previous node is of the same kind and immediately
-                        // precedes the implementation node (i.e. has the same parent and ends where the implementation starts).
-                        if (i > 0 && node.body) {
-                            var previous = symbol.declarations[i - 1];
-                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
-                                break;
-                            }
-                        }
-                        result.push(getSignatureFromDeclaration(node));
-                }
-            }
-            return result;
-        }
-        function resolveExternalModuleTypeByLiteral(name) {
-            var moduleSym = resolveExternalModuleName(name, name);
-            if (moduleSym) {
-                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
-                if (resolvedModuleSymbol) {
-                    return getTypeOfSymbol(resolvedModuleSymbol);
-                }
-            }
-            return anyType;
-        }
-        function getReturnTypeOfSignature(signature) {
-            if (!signature.resolvedReturnType) {
-                if (!pushTypeResolution(signature, 3 /* ResolvedReturnType */)) {
-                    return unknownType;
-                }
-                var type = void 0;
-                if (signature.target) {
-                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
-                }
-                else if (signature.unionSignatures) {
-                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature));
-                }
-                else {
-                    type = getReturnTypeFromBody(signature.declaration);
-                }
-                if (!popTypeResolution()) {
-                    type = anyType;
-                    if (compilerOptions.noImplicitAny) {
-                        var declaration = signature.declaration;
-                        if (declaration.name) {
-                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
-                        }
-                        else {
-                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
-                        }
-                    }
-                }
-                signature.resolvedReturnType = type;
-            }
-            return signature.resolvedReturnType;
-        }
-        function getRestTypeOfSignature(signature) {
-            if (signature.hasRestParameter) {
-                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
-                if (type.flags & 4096 /* Reference */ && type.target === globalArrayType) {
-                    return type.typeArguments[0];
-                }
-            }
-            return anyType;
-        }
-        function getSignatureInstantiation(signature, typeArguments) {
-            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), /*eraseTypeParameters*/ true);
-        }
-        function getErasedSignature(signature) {
-            if (!signature.typeParameters)
-                return signature;
-            if (!signature.erasedSignatureCache) {
-                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), /*eraseTypeParameters*/ true);
-            }
-            return signature.erasedSignatureCache;
-        }
-        function getOrCreateTypeFromSignature(signature) {
-            // There are two ways to declare a construct signature, one is by declaring a class constructor
-            // using the constructor keyword, and the other is declaring a bare construct signature in an
-            // object type literal or interface (using the new keyword). Each way of declaring a constructor
-            // will result in a different declaration kind.
-            if (!signature.isolatedSignatureType) {
-                var isConstructor = signature.declaration.kind === 148 /* Constructor */ || signature.declaration.kind === 152 /* ConstructSignature */;
-                var type = createObjectType(65536 /* Anonymous */ | 262144 /* FromSignature */);
-                type.members = emptySymbols;
-                type.properties = emptyArray;
-                type.callSignatures = !isConstructor ? [signature] : emptyArray;
-                type.constructSignatures = isConstructor ? [signature] : emptyArray;
-                signature.isolatedSignatureType = type;
-            }
-            return signature.isolatedSignatureType;
-        }
-        function getIndexSymbol(symbol) {
-            return symbol.members["__index"];
-        }
-        function getIndexDeclarationOfSymbol(symbol, kind) {
-            var syntaxKind = kind === 1 /* Number */ ? 130 /* NumberKeyword */ : 132 /* StringKeyword */;
-            var indexSymbol = getIndexSymbol(symbol);
-            if (indexSymbol) {
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var node = decl;
-                    if (node.parameters.length === 1) {
-                        var parameter = node.parameters[0];
-                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
-                            return node;
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function createIndexInfo(type, isReadonly, declaration) {
-            return { type: type, isReadonly: isReadonly, declaration: declaration };
-        }
-        function getIndexInfoOfSymbol(symbol, kind) {
-            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
-            if (declaration) {
-                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (declaration.flags & 64 /* Readonly */) !== 0, declaration);
-            }
-            return undefined;
-        }
-        function getConstraintDeclaration(type) {
-            return ts.getDeclarationOfKind(type.symbol, 141 /* TypeParameter */).constraint;
-        }
-        function hasConstraintReferenceTo(type, target) {
-            var checked;
-            while (type && !(type.flags & 33554432 /* ThisType */) && type.flags & 512 /* TypeParameter */ && !ts.contains(checked, type)) {
-                if (type === target) {
-                    return true;
-                }
-                (checked || (checked = [])).push(type);
-                var constraintDeclaration = getConstraintDeclaration(type);
-                type = constraintDeclaration && getTypeFromTypeNode(constraintDeclaration);
-            }
-            return false;
-        }
-        function getConstraintOfTypeParameter(typeParameter) {
-            if (!typeParameter.constraint) {
-                if (typeParameter.target) {
-                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
-                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
-                }
-                else {
-                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
-                    var constraint = getTypeFromTypeNode(constraintDeclaration);
-                    if (hasConstraintReferenceTo(constraint, typeParameter)) {
-                        error(constraintDeclaration, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
-                        constraint = unknownType;
-                    }
-                    typeParameter.constraint = constraint;
-                }
-            }
-            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
-        }
-        function getParentSymbolOfTypeParameter(typeParameter) {
-            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 141 /* TypeParameter */).parent);
-        }
-        function getTypeListId(types) {
-            if (types) {
-                switch (types.length) {
-                    case 1:
-                        return "" + types[0].id;
-                    case 2:
-                        return types[0].id + "," + types[1].id;
-                    default:
-                        var result = "";
-                        for (var i = 0; i < types.length; i++) {
-                            if (i > 0) {
-                                result += ",";
-                            }
-                            result += types[i].id;
-                        }
-                        return result;
-                }
-            }
-            return "";
-        }
-        // This function is used to propagate certain flags when creating new object type references and union types.
-        // It is only necessary to do so if a constituent type might be the undefined type, the null type, the type
-        // of an object literal or the anyFunctionType. This is because there are operations in the type checker
-        // that care about the presence of such types at arbitrary depth in a containing type.
-        function getPropagatingFlagsOfTypes(types, excludeKinds) {
-            var result = 0;
-            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
-                var type = types_3[_i];
-                if (!(type.flags & excludeKinds)) {
-                    result |= type.flags;
-                }
-            }
-            return result & 14680064 /* PropagatingFlags */;
-        }
-        function createTypeReference(target, typeArguments) {
-            var id = getTypeListId(typeArguments);
-            var type = target.instantiations[id];
-            if (!type) {
-                var propagatedFlags = typeArguments ? getPropagatingFlagsOfTypes(typeArguments, /*excludeKinds*/ 0) : 0;
-                var flags = 4096 /* Reference */ | propagatedFlags;
-                type = target.instantiations[id] = createObjectType(flags, target.symbol);
-                type.target = target;
-                type.typeArguments = typeArguments;
-            }
-            return type;
-        }
-        // Get type from reference to class or interface
-        function getTypeFromClassOrInterfaceReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
-            var typeParameters = type.localTypeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */), typeParameters.length);
-                    return unknownType;
-                }
-                // In a type reference, the outer type parameters of the referenced class or interface are automatically
-                // supplied as type arguments and the type reference only specifies arguments for the local type parameters
-                // of the class or interface.
-                return createTypeReference(type, ts.concatenate(type.outerTypeParameters, ts.map(node.typeArguments, getTypeFromTypeNode)));
-            }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
-                return unknownType;
-            }
-            return type;
-        }
-        // Get type from reference to type alias. When a type alias is generic, the declared type of the type alias may include
-        // references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
-        // declared type. Instantiations are cached using the type identities of the type arguments as the key.
-        function getTypeFromTypeAliasReference(node, symbol) {
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var links = getSymbolLinks(symbol);
-            var typeParameters = links.typeParameters;
-            if (typeParameters) {
-                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
-                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, symbolToString(symbol), typeParameters.length);
-                    return unknownType;
-                }
-                var typeArguments = ts.map(node.typeArguments, getTypeFromTypeNode);
-                var id = getTypeListId(typeArguments);
-                return links.instantiations[id] || (links.instantiations[id] = instantiateType(type, createTypeMapper(typeParameters, typeArguments)));
-            }
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
-            }
-            return type;
-        }
-        // Get type from reference to named type that cannot be generic (enum or type parameter)
-        function getTypeFromNonGenericTypeReference(node, symbol) {
-            if (node.typeArguments) {
-                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
-                return unknownType;
-            }
-            return getDeclaredTypeOfSymbol(symbol);
-        }
-        function getTypeReferenceName(node) {
-            switch (node.kind) {
-                case 155 /* TypeReference */:
-                    return node.typeName;
-                case 267 /* JSDocTypeReference */:
-                    return node.name;
-                case 194 /* ExpressionWithTypeArguments */:
-                    // We only support expressions that are simple qualified names. For other
-                    // expressions this produces undefined.
-                    if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                        return node.expression;
-                    }
-            }
-            return undefined;
-        }
-        function resolveTypeReferenceName(node, typeReferenceName) {
-            if (!typeReferenceName) {
-                return unknownSymbol;
-            }
-            return resolveEntityName(typeReferenceName, 793056 /* Type */) || unknownSymbol;
-        }
-        function getTypeReferenceType(node, symbol) {
-            if (symbol === unknownSymbol) {
-                return unknownType;
-            }
-            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
-                return getTypeFromClassOrInterfaceReference(node, symbol);
-            }
-            if (symbol.flags & 524288 /* TypeAlias */) {
-                return getTypeFromTypeAliasReference(node, symbol);
-            }
-            if (symbol.flags & 107455 /* Value */ && node.kind === 267 /* JSDocTypeReference */) {
-                // A JSDocTypeReference may have resolved to a value (as opposed to a type). In
-                // that case, the type of this reference is just the type of the value we resolved
-                // to.
-                return getTypeOfSymbol(symbol);
-            }
-            return getTypeFromNonGenericTypeReference(node, symbol);
-        }
-        function getTypeFromTypeReference(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var symbol = void 0;
-                var type = void 0;
-                if (node.kind === 267 /* JSDocTypeReference */) {
-                    var typeReferenceName = getTypeReferenceName(node);
-                    symbol = resolveTypeReferenceName(node, typeReferenceName);
-                    type = getTypeReferenceType(node, symbol);
-                    links.resolvedSymbol = symbol;
-                    links.resolvedType = type;
-                }
-                else {
-                    // We only support expressions that are simple qualified names. For other expressions this produces undefined.
-                    var typeNameOrExpression = node.kind === 155 /* TypeReference */ ? node.typeName :
-                        ts.isSupportedExpressionWithTypeArguments(node) ? node.expression :
-                            undefined;
-                    symbol = typeNameOrExpression && resolveEntityName(typeNameOrExpression, 793056 /* Type */) || unknownSymbol;
-                    type = symbol === unknownSymbol ? unknownType :
-                        symbol.flags & (32 /* Class */ | 64 /* Interface */) ? getTypeFromClassOrInterfaceReference(node, symbol) :
-                            symbol.flags & 524288 /* TypeAlias */ ? getTypeFromTypeAliasReference(node, symbol) :
-                                getTypeFromNonGenericTypeReference(node, symbol);
-                }
-                // Cache both the resolved symbol and the resolved type. The resolved symbol is needed in when we check the
-                // type reference in checkTypeReferenceOrExpressionWithTypeArguments.
-                links.resolvedSymbol = symbol;
-                links.resolvedType = type;
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeQueryNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                // TypeScript 1.0 spec (April 2014): 3.6.3
-                // The expression is processed as an identifier expression (section 4.3)
-                // or property access expression(section 4.10),
-                // the widened type(section 3.9) of which becomes the result.
-                links.resolvedType = getWidenedType(checkExpression(node.exprName));
-            }
-            return links.resolvedType;
-        }
-        function getTypeOfGlobalSymbol(symbol, arity) {
-            function getTypeDeclaration(symbol) {
-                var declarations = symbol.declarations;
-                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
-                    var declaration = declarations_3[_i];
-                    switch (declaration.kind) {
-                        case 221 /* ClassDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                            return declaration;
-                    }
-                }
-            }
-            if (!symbol) {
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            var type = getDeclaredTypeOfSymbol(symbol);
-            if (!(type.flags & 80896 /* ObjectType */)) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            if ((type.typeParameters ? type.typeParameters.length : 0) !== arity) {
-                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
-                return arity ? emptyGenericType : emptyObjectType;
-            }
-            return type;
-        }
-        function getGlobalValueSymbol(name) {
-            return getGlobalSymbol(name, 107455 /* Value */, ts.Diagnostics.Cannot_find_global_value_0);
-        }
-        function getGlobalTypeSymbol(name) {
-            return getGlobalSymbol(name, 793056 /* Type */, ts.Diagnostics.Cannot_find_global_type_0);
-        }
-        function getGlobalSymbol(name, meaning, diagnostic) {
-            return resolveName(undefined, name, meaning, diagnostic, name);
-        }
-        function getGlobalType(name, arity) {
-            if (arity === void 0) { arity = 0; }
-            return getTypeOfGlobalSymbol(getGlobalTypeSymbol(name), arity);
-        }
-        /**
-         * Returns a type that is inside a namespace at the global scope, e.g.
-         * getExportedTypeFromNamespace('JSX', 'Element') returns the JSX.Element type
-         */
-        function getExportedTypeFromNamespace(namespace, name) {
-            var namespaceSymbol = getGlobalSymbol(namespace, 1536 /* Namespace */, /*diagnosticMessage*/ undefined);
-            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793056 /* Type */);
-            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
-        }
-        /**
-          * Creates a TypeReference for a generic `TypedPropertyDescriptor<T>`.
-          */
-        function createTypedPropertyDescriptorType(propertyType) {
-            var globalTypedPropertyDescriptorType = getGlobalTypedPropertyDescriptorType();
-            return globalTypedPropertyDescriptorType !== emptyGenericType
-                ? createTypeReference(globalTypedPropertyDescriptorType, [propertyType])
-                : emptyObjectType;
-        }
-        /**
-         * Instantiates a global type that is generic with some element type, and returns that instantiation.
-         */
-        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
-            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
-        }
-        function createIterableType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableType(), [elementType]);
-        }
-        function createIterableIteratorType(elementType) {
-            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(), [elementType]);
-        }
-        function createArrayType(elementType) {
-            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
-        }
-        function getTypeFromArrayTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
-            }
-            return links.resolvedType;
-        }
-        function createTupleType(elementTypes) {
-            var id = getTypeListId(elementTypes);
-            return tupleTypes[id] || (tupleTypes[id] = createNewTupleType(elementTypes));
-        }
-        function createNewTupleType(elementTypes) {
-            var propagatedFlags = getPropagatingFlagsOfTypes(elementTypes, /*excludeKinds*/ 0);
-            var type = createObjectType(8192 /* Tuple */ | propagatedFlags);
-            type.elementTypes = elementTypes;
-            return type;
-        }
-        function getTypeFromTupleTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNode));
-            }
-            return links.resolvedType;
-        }
-        function addTypeToSet(typeSet, type, typeSetKind) {
-            if (type.flags & typeSetKind) {
-                addTypesToSet(typeSet, type.types, typeSetKind);
-            }
-            else if (type.flags & (1 /* Any */ | 32 /* Undefined */ | 64 /* Null */)) {
-                if (type.flags & 1 /* Any */)
-                    typeSet.containsAny = true;
-                if (type.flags & 32 /* Undefined */)
-                    typeSet.containsUndefined = true;
-                if (type.flags & 64 /* Null */)
-                    typeSet.containsNull = true;
-            }
-            else if (type !== neverType && !ts.contains(typeSet, type)) {
-                typeSet.push(type);
-            }
-        }
-        // Add the given types to the given type set. Order is preserved, duplicates are removed,
-        // and nested types of the given kind are flattened into the set.
-        function addTypesToSet(typeSet, types, typeSetKind) {
-            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
-                var type = types_4[_i];
-                addTypeToSet(typeSet, type, typeSetKind);
-            }
-        }
-        function isSubtypeOfAny(candidate, types) {
-            for (var i = 0, len = types.length; i < len; i++) {
-                if (candidate !== types[i] && isTypeSubtypeOf(candidate, types[i])) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function removeSubtypes(types) {
-            var i = types.length;
-            while (i > 0) {
-                i--;
-                if (isSubtypeOfAny(types[i], types)) {
-                    types.splice(i, 1);
-                }
-            }
-        }
-        // We reduce the constituent type set to only include types that aren't subtypes of other types, unless
-        // the noSubtypeReduction flag is specified, in which case we perform a simple deduplication based on
-        // object identity. Subtype reduction is possible only when union types are known not to circularly
-        // reference themselves (as is the case with union types created by expression constructs such as array
-        // literals and the || and ?: operators). Named types can circularly reference themselves and therefore
-        // cannot be deduplicated during their declaration. For example, "type Item = string | (() => Item" is
-        // a named type that circularly references itself.
-        function getUnionType(types, noSubtypeReduction) {
-            if (types.length === 0) {
-                return neverType;
-            }
-            if (types.length === 1) {
-                return types[0];
-            }
-            var typeSet = [];
-            addTypesToSet(typeSet, types, 16384 /* Union */);
-            if (typeSet.containsAny) {
-                return anyType;
-            }
-            if (strictNullChecks) {
-                if (typeSet.containsNull)
-                    typeSet.push(nullType);
-                if (typeSet.containsUndefined)
-                    typeSet.push(undefinedType);
-            }
-            if (!noSubtypeReduction) {
-                removeSubtypes(typeSet);
-            }
-            if (typeSet.length === 0) {
-                return typeSet.containsNull ? nullType :
-                    typeSet.containsUndefined ? undefinedType :
-                        neverType;
-            }
-            else if (typeSet.length === 1) {
-                return typeSet[0];
-            }
-            var id = getTypeListId(typeSet);
-            var type = unionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 96 /* Nullable */);
-                type = unionTypes[id] = createObjectType(16384 /* Union */ | propagatedFlags);
-                type.types = typeSet;
-            }
-            return type;
-        }
-        function getTypeFromUnionTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), /*noSubtypeReduction*/ true);
-            }
-            return links.resolvedType;
-        }
-        // We do not perform structural deduplication on intersection types. Intersection types are created only by the &
-        // type operator and we can't reduce those because we want to support recursive intersection types. For example,
-        // a type alias of the form "type List<T> = T & { next: List<T> }" cannot be reduced during its declaration.
-        // Also, unlike union types, the order of the constituent types is preserved in order that overload resolution
-        // for intersections of types with signatures can be deterministic.
-        function getIntersectionType(types) {
-            if (types.length === 0) {
-                return emptyObjectType;
-            }
-            var typeSet = [];
-            addTypesToSet(typeSet, types, 32768 /* Intersection */);
-            if (typeSet.containsAny) {
-                return anyType;
-            }
-            if (strictNullChecks) {
-                if (typeSet.containsNull)
-                    typeSet.push(nullType);
-                if (typeSet.containsUndefined)
-                    typeSet.push(undefinedType);
-            }
-            if (typeSet.length === 1) {
-                return typeSet[0];
-            }
-            var id = getTypeListId(typeSet);
-            var type = intersectionTypes[id];
-            if (!type) {
-                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 96 /* Nullable */);
-                type = intersectionTypes[id] = createObjectType(32768 /* Intersection */ | propagatedFlags);
-                type.types = typeSet;
-            }
-            return type;
-        }
-        function getTypeFromIntersectionTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNode));
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                // Deferred resolution of members is handled by resolveObjectTypeMembers
-                links.resolvedType = createObjectType(65536 /* Anonymous */, node.symbol);
-            }
-            return links.resolvedType;
-        }
-        function getStringLiteralTypeForText(text) {
-            if (ts.hasProperty(stringLiteralTypes, text)) {
-                return stringLiteralTypes[text];
-            }
-            var type = stringLiteralTypes[text] = createType(256 /* StringLiteral */);
-            type.text = text;
-            return type;
-        }
-        function getTypeFromStringLiteralTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getStringLiteralTypeForText(ts.unescapeIdentifier(node.text));
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromJSDocVariadicType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var type = getTypeFromTypeNode(node.type);
-                links.resolvedType = type ? createArrayType(type) : unknownType;
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromJSDocTupleType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                var types = ts.map(node.types, getTypeFromTypeNode);
-                links.resolvedType = createTupleType(types);
-            }
-            return links.resolvedType;
-        }
-        function getThisType(node) {
-            var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
-            var parent = container && container.parent;
-            if (parent && (ts.isClassLike(parent) || parent.kind === 222 /* InterfaceDeclaration */)) {
-                if (!(container.flags & 32 /* Static */) &&
-                    (container.kind !== 148 /* Constructor */ || ts.isNodeDescendentOf(node, container.body))) {
-                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
-                }
-            }
-            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
-            return unknownType;
-        }
-        function getTypeFromThisTypeNode(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                links.resolvedType = getThisType(node);
-            }
-            return links.resolvedType;
-        }
-        function getTypeFromTypeNode(node) {
-            switch (node.kind) {
-                case 117 /* AnyKeyword */:
-                case 258 /* JSDocAllType */:
-                case 259 /* JSDocUnknownType */:
-                    return anyType;
-                case 132 /* StringKeyword */:
-                    return stringType;
-                case 130 /* NumberKeyword */:
-                    return numberType;
-                case 120 /* BooleanKeyword */:
-                    return booleanType;
-                case 133 /* SymbolKeyword */:
-                    return esSymbolType;
-                case 103 /* VoidKeyword */:
-                    return voidType;
-                case 135 /* UndefinedKeyword */:
-                    return undefinedType;
-                case 93 /* NullKeyword */:
-                    return nullType;
-                case 127 /* NeverKeyword */:
-                    return neverType;
-                case 165 /* ThisType */:
-                case 97 /* ThisKeyword */:
-                    return getTypeFromThisTypeNode(node);
-                case 166 /* StringLiteralType */:
-                    return getTypeFromStringLiteralTypeNode(node);
-                case 155 /* TypeReference */:
-                case 267 /* JSDocTypeReference */:
-                    return getTypeFromTypeReference(node);
-                case 154 /* TypePredicate */:
-                    return booleanType;
-                case 194 /* ExpressionWithTypeArguments */:
-                    return getTypeFromTypeReference(node);
-                case 158 /* TypeQuery */:
-                    return getTypeFromTypeQueryNode(node);
-                case 160 /* ArrayType */:
-                case 260 /* JSDocArrayType */:
-                    return getTypeFromArrayTypeNode(node);
-                case 161 /* TupleType */:
-                    return getTypeFromTupleTypeNode(node);
-                case 162 /* UnionType */:
-                case 261 /* JSDocUnionType */:
-                    return getTypeFromUnionTypeNode(node);
-                case 163 /* IntersectionType */:
-                    return getTypeFromIntersectionTypeNode(node);
-                case 164 /* ParenthesizedType */:
-                case 263 /* JSDocNullableType */:
-                case 264 /* JSDocNonNullableType */:
-                case 271 /* JSDocConstructorType */:
-                case 272 /* JSDocThisType */:
-                case 268 /* JSDocOptionalType */:
-                    return getTypeFromTypeNode(node.type);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 159 /* TypeLiteral */:
-                case 269 /* JSDocFunctionType */:
-                case 265 /* JSDocRecordType */:
-                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
-                // This function assumes that an identifier or qualified name is a type expression
-                // Callers should first ensure this by calling isTypeNode
-                case 69 /* Identifier */:
-                case 139 /* QualifiedName */:
-                    var symbol = getSymbolAtLocation(node);
-                    return symbol && getDeclaredTypeOfSymbol(symbol);
-                case 262 /* JSDocTupleType */:
-                    return getTypeFromJSDocTupleType(node);
-                case 270 /* JSDocVariadicType */:
-                    return getTypeFromJSDocVariadicType(node);
-                default:
-                    return unknownType;
-            }
-        }
-        function instantiateList(items, mapper, instantiator) {
-            if (items && items.length) {
-                var result = [];
-                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
-                    var v = items_1[_i];
-                    result.push(instantiator(v, mapper));
-                }
-                return result;
-            }
-            return items;
-        }
-        function createUnaryTypeMapper(source, target) {
-            return function (t) { return t === source ? target : t; };
-        }
-        function createBinaryTypeMapper(source1, target1, source2, target2) {
-            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
-        }
-        function createArrayTypeMapper(sources, targets) {
-            return function (t) {
-                for (var i = 0; i < sources.length; i++) {
-                    if (t === sources[i]) {
-                        return targets ? targets[i] : anyType;
-                    }
-                }
-                return t;
-            };
-        }
-        function createTypeMapper(sources, targets) {
-            var count = sources.length;
-            var mapper = count == 1 ? createUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
-                count == 2 ? createBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
-                    createArrayTypeMapper(sources, targets);
-            mapper.mappedTypes = sources;
-            return mapper;
-        }
-        function createTypeEraser(sources) {
-            return createTypeMapper(sources, undefined);
-        }
-        function getInferenceMapper(context) {
-            if (!context.mapper) {
-                var mapper = function (t) {
-                    var typeParameters = context.typeParameters;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (t === typeParameters[i]) {
-                            context.inferences[i].isFixed = true;
-                            return getInferredType(context, i);
-                        }
-                    }
-                    return t;
-                };
-                mapper.mappedTypes = context.typeParameters;
-                mapper.context = context;
-                context.mapper = mapper;
-            }
-            return context.mapper;
-        }
-        function identityMapper(type) {
-            return type;
-        }
-        function combineTypeMappers(mapper1, mapper2) {
-            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
-            mapper.mappedTypes = mapper1.mappedTypes;
-            return mapper;
-        }
-        function cloneTypeParameter(typeParameter) {
-            var result = createType(512 /* TypeParameter */);
-            result.symbol = typeParameter.symbol;
-            result.target = typeParameter;
-            return result;
-        }
-        function cloneTypePredicate(predicate, mapper) {
-            if (ts.isIdentifierTypePredicate(predicate)) {
-                return {
-                    kind: 1 /* Identifier */,
-                    parameterName: predicate.parameterName,
-                    parameterIndex: predicate.parameterIndex,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
-            else {
-                return {
-                    kind: 0 /* This */,
-                    type: instantiateType(predicate.type, mapper)
-                };
-            }
-        }
-        function instantiateSignature(signature, mapper, eraseTypeParameters) {
-            var freshTypeParameters;
-            var freshTypePredicate;
-            if (signature.typeParameters && !eraseTypeParameters) {
-                // First create a fresh set of type parameters, then include a mapping from the old to the
-                // new type parameters in the mapper function. Finally store this mapper in the new type
-                // parameters such that we can use it when instantiating constraints.
-                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
-                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
-                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
-                    var tp = freshTypeParameters_1[_i];
-                    tp.mapper = mapper;
-                }
-            }
-            if (signature.typePredicate) {
-                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
-            }
-            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisType && instantiateType(signature.thisType, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), instantiateType(signature.resolvedReturnType, mapper), freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasStringLiterals);
-            result.target = signature;
-            result.mapper = mapper;
-            return result;
-        }
-        function instantiateSymbol(symbol, mapper) {
-            if (symbol.flags & 16777216 /* Instantiated */) {
-                var links = getSymbolLinks(symbol);
-                // If symbol being instantiated is itself a instantiation, fetch the original target and combine the
-                // type mappers. This ensures that original type identities are properly preserved and that aliases
-                // always reference a non-aliases.
-                symbol = links.target;
-                mapper = combineTypeMappers(links.mapper, mapper);
-            }
-            // Keep the flags from the symbol we're instantiating.  Mark that is instantiated, and
-            // also transient so that we can just store data on it directly.
-            var result = createSymbol(16777216 /* Instantiated */ | 67108864 /* Transient */ | symbol.flags, symbol.name);
-            result.declarations = symbol.declarations;
-            result.parent = symbol.parent;
-            result.target = symbol;
-            result.mapper = mapper;
-            if (symbol.valueDeclaration) {
-                result.valueDeclaration = symbol.valueDeclaration;
-            }
-            return result;
-        }
-        function instantiateAnonymousType(type, mapper) {
-            if (mapper.instantiations) {
-                var cachedType = mapper.instantiations[type.id];
-                if (cachedType) {
-                    return cachedType;
-                }
-            }
-            else {
-                mapper.instantiations = [];
-            }
-            // Mark the anonymous type as instantiated such that our infinite instantiation detection logic can recognize it
-            var result = createObjectType(65536 /* Anonymous */ | 131072 /* Instantiated */, type.symbol);
-            result.target = type;
-            result.mapper = mapper;
-            mapper.instantiations[type.id] = result;
-            return result;
-        }
-        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
-            var mappedTypes = mapper.mappedTypes;
-            // Starting with the parent of the symbol's declaration, check if the mapper maps any of
-            // the type parameters introduced by enclosing declarations. We just pick the first
-            // declaration since multiple declarations will all have the same parent anyway.
-            var node = symbol.declarations[0].parent;
-            while (node) {
-                switch (node.kind) {
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                        var declaration = node;
-                        if (declaration.typeParameters) {
-                            for (var _i = 0, _a = declaration.typeParameters; _i < _a.length; _i++) {
-                                var d = _a[_i];
-                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
-                                    return true;
-                                }
-                            }
-                        }
-                        if (ts.isClassLike(node) || node.kind === 222 /* InterfaceDeclaration */) {
-                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
-                            if (thisType && ts.contains(mappedTypes, thisType)) {
-                                return true;
-                            }
-                        }
-                        break;
-                    case 225 /* ModuleDeclaration */:
-                    case 256 /* SourceFile */:
-                        return false;
-                }
-                node = node.parent;
-            }
-            return false;
-        }
-        function instantiateType(type, mapper) {
-            if (type && mapper !== identityMapper) {
-                if (type.flags & 512 /* TypeParameter */) {
-                    return mapper(type);
-                }
-                if (type.flags & 65536 /* Anonymous */) {
-                    // If the anonymous type originates in a declaration of a function, method, class, or
-                    // interface, in an object type literal, or in an object literal expression, we may need
-                    // to instantiate the type because it might reference a type parameter. We skip instantiation
-                    // if none of the type parameters that are in scope in the type's declaration are mapped by
-                    // the given mapper, however we can only do that analysis if the type isn't itself an
-                    // instantiation.
-                    return type.symbol &&
-                        type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */) &&
-                        (type.flags & 131072 /* Instantiated */ || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
-                        instantiateAnonymousType(type, mapper) : type;
-                }
-                if (type.flags & 4096 /* Reference */) {
-                    return createTypeReference(type.target, instantiateList(type.typeArguments, mapper, instantiateType));
-                }
-                if (type.flags & 8192 /* Tuple */) {
-                    return createTupleType(instantiateList(type.elementTypes, mapper, instantiateType));
-                }
-                if (type.flags & 16384 /* Union */) {
-                    return getUnionType(instantiateList(type.types, mapper, instantiateType), /*noSubtypeReduction*/ true);
-                }
-                if (type.flags & 32768 /* Intersection */) {
-                    return getIntersectionType(instantiateList(type.types, mapper, instantiateType));
-                }
-            }
-            return type;
-        }
-        function instantiateIndexInfo(info, mapper) {
-            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
-        }
-        // Returns true if the given expression contains (at any level of nesting) a function or arrow expression
-        // that is subject to contextual typing.
-        function isContextSensitive(node) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            switch (node.kind) {
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 171 /* ObjectLiteralExpression */:
-                    return ts.forEach(node.properties, isContextSensitive);
-                case 170 /* ArrayLiteralExpression */:
-                    return ts.forEach(node.elements, isContextSensitive);
-                case 188 /* ConditionalExpression */:
-                    return isContextSensitive(node.whenTrue) ||
-                        isContextSensitive(node.whenFalse);
-                case 187 /* BinaryExpression */:
-                    return node.operatorToken.kind === 52 /* BarBarToken */ &&
-                        (isContextSensitive(node.left) || isContextSensitive(node.right));
-                case 253 /* PropertyAssignment */:
-                    return isContextSensitive(node.initializer);
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    return isContextSensitiveFunctionLikeDeclaration(node);
-                case 178 /* ParenthesizedExpression */:
-                    return isContextSensitive(node.expression);
-            }
-            return false;
-        }
-        function isContextSensitiveFunctionLikeDeclaration(node) {
-            var areAllParametersUntyped = !ts.forEach(node.parameters, function (p) { return p.type; });
-            var isNullaryArrow = node.kind === 180 /* ArrowFunction */ && !node.parameters.length;
-            return !node.typeParameters && areAllParametersUntyped && !isNullaryArrow;
-        }
-        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
-            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
-        }
-        function getTypeWithoutSignatures(type) {
-            if (type.flags & 80896 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.constructSignatures.length) {
-                    var result = createObjectType(65536 /* Anonymous */, type.symbol);
-                    result.members = resolved.members;
-                    result.properties = resolved.properties;
-                    result.callSignatures = emptyArray;
-                    result.constructSignatures = emptyArray;
-                    type = result;
-                }
-            }
-            return type;
-        }
-        // TYPE CHECKING
-        function isTypeIdenticalTo(source, target) {
-            return checkTypeRelatedTo(source, target, identityRelation, /*errorNode*/ undefined);
-        }
-        function compareTypesIdentical(source, target) {
-            return checkTypeRelatedTo(source, target, identityRelation, /*errorNode*/ undefined) ? -1 /* True */ : 0 /* False */;
-        }
-        function compareTypesAssignable(source, target) {
-            return checkTypeRelatedTo(source, target, assignableRelation, /*errorNode*/ undefined) ? -1 /* True */ : 0 /* False */;
-        }
-        function isTypeSubtypeOf(source, target) {
-            return checkTypeSubtypeOf(source, target, /*errorNode*/ undefined);
-        }
-        function isTypeAssignableTo(source, target) {
-            return checkTypeAssignableTo(source, target, /*errorNode*/ undefined);
-        }
-        /**
-         * This is *not* a bi-directional relationship.
-         * If one needs to check both directions for comparability, use a second call to this function or 'checkTypeComparableTo'.
-         */
-        function isTypeComparableTo(source, target) {
-            return checkTypeComparableTo(source, target, /*errorNode*/ undefined);
-        }
-        function checkTypeSubtypeOf(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
-        }
-        /**
-         * This is *not* a bi-directional relationship.
-         * If one needs to check both directions for comparability, use a second call to this function or 'isTypeComparableTo'.
-         */
-        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
-            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
-        }
-        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
-            return compareSignaturesRelated(source, target, ignoreReturnTypes, /*reportErrors*/ false, /*errorReporter*/ undefined, compareTypesAssignable) !== 0 /* False */;
-        }
-        /**
-         * See signatureRelatedTo, compareSignaturesIdentical
-         */
-        function compareSignaturesRelated(source, target, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
-            // TODO (drosen): De-duplicate code between related functions.
-            if (source === target) {
-                return -1 /* True */;
-            }
-            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
-                return 0 /* False */;
-            }
-            // Spec 1.0 Section 3.8.3 & 3.8.4:
-            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1 /* True */;
-            if (source.thisType && target.thisType && source.thisType !== voidType) {
-                // void sources are assignable to anything.
-                var related = compareTypes(source.thisType, target.thisType, /*reportErrors*/ false)
-                    || compareTypes(target.thisType, source.thisType, reportErrors);
-                if (!related) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
-                    }
-                    return 0 /* False */;
-                }
-                result &= related;
-            }
-            var sourceMax = getNumNonRestParameters(source);
-            var targetMax = getNumNonRestParameters(target);
-            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
-            var sourceParams = source.parameters;
-            var targetParams = target.parameters;
-            for (var i = 0; i < checkCount; i++) {
-                var s = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
-                var t = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
-                var related = compareTypes(s, t, /*reportErrors*/ false) || compareTypes(t, s, reportErrors);
-                if (!related) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
-                    }
-                    return 0 /* False */;
-                }
-                result &= related;
-            }
-            if (!ignoreReturnTypes) {
-                var targetReturnType = getReturnTypeOfSignature(target);
-                if (targetReturnType === voidType) {
-                    return result;
-                }
-                var sourceReturnType = getReturnTypeOfSignature(source);
-                // The following block preserves behavior forbidding boolean returning functions from being assignable to type guard returning functions
-                if (target.typePredicate) {
-                    if (source.typePredicate) {
-                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
-                    }
-                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
-                        if (reportErrors) {
-                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
-                        }
-                        return 0 /* False */;
-                    }
-                }
-                else {
-                    result &= compareTypes(sourceReturnType, targetReturnType, reportErrors);
-                }
-            }
-            return result;
-        }
-        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
-            if (source.kind !== target.kind) {
-                if (reportErrors) {
-                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
-                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-                }
-                return 0 /* False */;
-            }
-            if (source.kind === 1 /* Identifier */) {
-                var sourceIdentifierPredicate = source;
-                var targetIdentifierPredicate = target;
-                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
-                    if (reportErrors) {
-                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
-                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-                    }
-                    return 0 /* False */;
-                }
-            }
-            var related = compareTypes(source.type, target.type, reportErrors);
-            if (related === 0 /* False */ && reportErrors) {
-                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
-            }
-            return related;
-        }
-        function isImplementationCompatibleWithOverload(implementation, overload) {
-            var erasedSource = getErasedSignature(implementation);
-            var erasedTarget = getErasedSignature(overload);
-            // First see if the return types are compatible in either direction.
-            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
-            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
-            if (targetReturnType === voidType
-                || checkTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation, /*errorNode*/ undefined)
-                || checkTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation, /*errorNode*/ undefined)) {
-                return isSignatureAssignableTo(erasedSource, erasedTarget, /*ignoreReturnTypes*/ true);
-            }
-            return false;
-        }
-        function getNumNonRestParameters(signature) {
-            var numParams = signature.parameters.length;
-            return signature.hasRestParameter ?
-                numParams - 1 :
-                numParams;
-        }
-        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
-            if (source.hasRestParameter === target.hasRestParameter) {
-                if (source.hasRestParameter) {
-                    // If both have rest parameters, get the max and add 1 to
-                    // compensate for the rest parameter.
-                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
-                }
-                else {
-                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
-                }
-            }
-            else {
-                // Return the count for whichever signature doesn't have rest parameters.
-                return source.hasRestParameter ?
-                    targetNonRestParamCount :
-                    sourceNonRestParamCount;
-            }
-        }
-        /**
-         * Checks if 'source' is related to 'target' (e.g.: is a assignable to).
-         * @param source The left-hand-side of the relation.
-         * @param target The right-hand-side of the relation.
-         * @param relation The relation considered. One of 'identityRelation', 'subtypeRelation', 'assignableRelation', or 'comparableRelation'.
-         * Used as both to determine which checks are performed and as a cache of previously computed results.
-         * @param errorNode The suggested node upon which all errors will be reported, if defined. This may or may not be the actual node used.
-         * @param headMessage If the error chain should be prepended by a head message, then headMessage will be used.
-         * @param containingMessageChain A chain of errors to prepend any new errors found.
-         */
-        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
-            var errorInfo;
-            var sourceStack;
-            var targetStack;
-            var maybeStack;
-            var expandingFlags;
-            var depth = 0;
-            var overflow = false;
-            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
-            var result = isRelatedTo(source, target, /*reportErrors*/ !!errorNode, headMessage);
-            if (overflow) {
-                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
-            }
-            else if (errorInfo) {
-                if (containingMessageChain) {
-                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
-                }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
-            }
-            return result !== 0 /* False */;
-            function reportError(message, arg0, arg1, arg2) {
-                ts.Debug.assert(!!errorNode);
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
-            }
-            function reportRelationError(message, source, target) {
-                var sourceType = typeToString(source);
-                var targetType = typeToString(target);
-                if (sourceType === targetType) {
-                    sourceType = typeToString(source, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */);
-                    targetType = typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */);
-                }
-                if (!message) {
-                    message = relation === comparableRelation ?
-                        ts.Diagnostics.Type_0_is_not_comparable_to_type_1 :
-                        ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
-                }
-                reportError(message, sourceType, targetType);
-            }
-            // Compare two types and return
-            // Ternary.True if they are related with no assumptions,
-            // Ternary.Maybe if they are related with assumptions of other relationships, or
-            // Ternary.False if they are not related.
-            function isRelatedTo(source, target, reportErrors, headMessage) {
-                var result;
-                // both types are the same - covers 'they are the same primitive type or both are Any' or the same type parameter cases
-                if (source === target)
-                    return -1 /* True */;
-                if (relation === identityRelation) {
-                    return isIdenticalTo(source, target);
-                }
-                if (!(target.flags & 134217728 /* Never */)) {
-                    if (target.flags & 1 /* Any */ || source.flags & 134217728 /* Never */)
-                        return -1 /* True */;
-                    if (source.flags & 32 /* Undefined */) {
-                        if (!strictNullChecks || target.flags & (32 /* Undefined */ | 16 /* Void */) || source === emptyArrayElementType)
-                            return -1 /* True */;
-                    }
-                    if (source.flags & 64 /* Null */) {
-                        if (!strictNullChecks || target.flags & 64 /* Null */)
-                            return -1 /* True */;
-                    }
-                    if (source.flags & 128 /* Enum */ && target === numberType)
-                        return -1 /* True */;
-                    if (source.flags & 128 /* Enum */ && target.flags & 128 /* Enum */) {
-                        if (result = enumRelatedTo(source, target, reportErrors)) {
-                            return result;
-                        }
-                    }
-                    if (source.flags & 256 /* StringLiteral */ && target === stringType)
-                        return -1 /* True */;
-                    if (relation === assignableRelation || relation === comparableRelation) {
-                        if (source.flags & 1 /* Any */)
-                            return -1 /* True */;
-                        if (source === numberType && target.flags & 128 /* Enum */)
-                            return -1 /* True */;
-                    }
-                    if (source.flags & 8 /* Boolean */ && target.flags & 8 /* Boolean */) {
-                        return -1 /* True */;
-                    }
-                }
-                if (source.flags & 1048576 /* FreshObjectLiteral */) {
-                    if (hasExcessProperties(source, target, reportErrors)) {
-                        if (reportErrors) {
-                            reportRelationError(headMessage, source, target);
-                        }
-                        return 0 /* False */;
-                    }
-                    // Above we check for excess properties with respect to the entire target type. When union
-                    // and intersection types are further deconstructed on the target side, we don't want to
-                    // make the check again (as it might fail for a partial target type). Therefore we obtain
-                    // the regular source type and proceed with that.
-                    if (target.flags & 49152 /* UnionOrIntersection */) {
-                        source = getRegularTypeOfObjectLiteral(source);
-                    }
-                }
-                var saveErrorInfo = errorInfo;
-                // Note that these checks are specifically ordered to produce correct results.
-                if (source.flags & 16384 /* Union */) {
-                    if (relation === comparableRelation) {
-                        result = someTypeRelatedToType(source, target, reportErrors);
-                    }
-                    else {
-                        result = eachTypeRelatedToType(source, target, reportErrors);
-                    }
-                    if (result) {
-                        return result;
-                    }
-                }
-                else if (target.flags & 32768 /* Intersection */) {
-                    result = typeRelatedToEachType(source, target, reportErrors);
-                    if (result) {
-                        return result;
-                    }
-                }
-                else {
-                    // It is necessary to try these "some" checks on both sides because there may be nested "each" checks
-                    // on either side that need to be prioritized. For example, A | B = (A | B) & (C | D) or
-                    // A & B = (A & B) | (C & D).
-                    if (source.flags & 32768 /* Intersection */) {
-                        // Check to see if any constituents of the intersection are immediately related to the target.
-                        //
-                        // Don't report errors though. Checking whether a constituent is related to the source is not actually
-                        // useful and leads to some confusing error messages. Instead it is better to let the below checks
-                        // take care of this, or to not elaborate at all. For instance,
-                        //
-                        //    - For an object type (such as 'C = A & B'), users are usually more interested in structural errors.
-                        //
-                        //    - For a union type (such as '(A | B) = (C & D)'), it's better to hold onto the whole intersection
-                        //          than to report that 'D' is not assignable to 'A' or 'B'.
-                        //
-                        //    - For a primitive type or type parameter (such as 'number = A & B') there is no point in
-                        //          breaking the intersection apart.
-                        if (result = someTypeRelatedToType(source, target, /*reportErrors*/ false)) {
-                            return result;
-                        }
-                    }
-                    if (target.flags & 16384 /* Union */) {
-                        if (result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 16777726 /* Primitive */))) {
-                            return result;
-                        }
-                    }
-                }
-                if (source.flags & 512 /* TypeParameter */) {
-                    var constraint = getConstraintOfTypeParameter(source);
-                    if (!constraint || constraint.flags & 1 /* Any */) {
-                        constraint = emptyObjectType;
-                    }
-                    // The constraint may need to be further instantiated with its 'this' type.
-                    constraint = getTypeWithThisArgument(constraint, source);
-                    // Report constraint errors only if the constraint is not the empty object type
-                    var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
-                    if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
-                        errorInfo = saveErrorInfo;
-                        return result;
-                    }
-                }
-                else {
-                    if (source.flags & 4096 /* Reference */ && target.flags & 4096 /* Reference */ && source.target === target.target) {
-                        // We have type references to same target type, see if relationship holds for all type arguments
-                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
-                            return result;
-                        }
-                    }
-                    // Even if relationship doesn't hold for unions, intersections, or generic type references,
-                    // it may hold in a structural comparison.
-                    var apparentSource = getApparentType(source);
-                    // In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
-                    // to X. Failing both of those we want to check if the aggregation of A and B's members structurally
-                    // relates to X. Thus, we include intersection types on the source side here.
-                    if (apparentSource.flags & (80896 /* ObjectType */ | 32768 /* Intersection */) && target.flags & 80896 /* ObjectType */) {
-                        // Report structural errors only if we haven't reported any errors yet
-                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !(source.flags & 16777726 /* Primitive */);
-                        if (result = objectTypeRelatedTo(apparentSource, source, target, reportStructuralErrors)) {
-                            errorInfo = saveErrorInfo;
-                            return result;
-                        }
-                    }
-                }
-                if (reportErrors) {
-                    reportRelationError(headMessage, source, target);
-                }
-                return 0 /* False */;
-            }
-            function isIdenticalTo(source, target) {
-                var result;
-                if (source.flags & 80896 /* ObjectType */ && target.flags & 80896 /* ObjectType */) {
-                    if (source.flags & 4096 /* Reference */ && target.flags & 4096 /* Reference */ && source.target === target.target) {
-                        // We have type references to same target type, see if all type arguments are identical
-                        if (result = typeArgumentsRelatedTo(source, target, /*reportErrors*/ false)) {
-                            return result;
-                        }
-                    }
-                    return objectTypeRelatedTo(source, source, target, /*reportErrors*/ false);
-                }
-                if (source.flags & 16384 /* Union */ && target.flags & 16384 /* Union */ ||
-                    source.flags & 32768 /* Intersection */ && target.flags & 32768 /* Intersection */) {
-                    if (result = eachTypeRelatedToSomeType(source, target, /*reportErrors*/ false)) {
-                        if (result &= eachTypeRelatedToSomeType(target, source, /*reportErrors*/ false)) {
-                            return result;
-                        }
-                    }
-                }
-                return 0 /* False */;
-            }
-            // Check if a property with the given name is known anywhere in the given type. In an object type, a property
-            // is considered known if the object type is empty and the check is for assignability, if the object type has
-            // index signatures, or if the property is actually declared in the object type. In a union or intersection
-            // type, a property is considered known if it is known in any constituent type.
-            function isKnownProperty(type, name) {
-                if (type.flags & 80896 /* ObjectType */) {
-                    var resolved = resolveStructuredTypeMembers(type);
-                    if ((relation === assignableRelation || relation === comparableRelation) &&
-                        (type === globalObjectType || isEmptyObjectType(resolved)) ||
-                        resolved.stringIndexInfo || resolved.numberIndexInfo || getPropertyOfType(type, name)) {
-                        return true;
-                    }
-                }
-                else if (type.flags & 49152 /* UnionOrIntersection */) {
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (isKnownProperty(t, name)) {
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
-            function isEmptyObjectType(t) {
-                return t.properties.length === 0 &&
-                    t.callSignatures.length === 0 &&
-                    t.constructSignatures.length === 0 &&
-                    !t.stringIndexInfo &&
-                    !t.numberIndexInfo;
-            }
-            function hasExcessProperties(source, target, reportErrors) {
-                if (!(target.flags & 67108864 /* ObjectLiteralPatternWithComputedProperties */) && maybeTypeOfKind(target, 80896 /* ObjectType */)) {
-                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                        var prop = _a[_i];
-                        if (!isKnownProperty(target, prop.name)) {
-                            if (reportErrors) {
-                                // We know *exactly* where things went wrong when comparing the types.
-                                // Use this property as the error node as this will be more helpful in
-                                // reasoning about what went wrong.
-                                ts.Debug.assert(!!errorNode);
-                                errorNode = prop.valueDeclaration;
-                                reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
-                            }
-                            return true;
-                        }
-                    }
-                }
-                return false;
-            }
-            function eachTypeRelatedToSomeType(source, target, reportErrors) {
-                var result = -1 /* True */;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
-                    var sourceType = sourceTypes_1[_i];
-                    var related = typeRelatedToSomeType(sourceType, target, /*reportErrors*/ false);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function typeRelatedToSomeType(source, target, reportErrors) {
-                var targetTypes = target.types;
-                var len = targetTypes.length;
-                // The null and undefined types are guaranteed to be at the end of the constituent type list. In order
-                // to produce the best possible errors we first check the nullable types, such that the last type we
-                // check and report errors from is a non-nullable type if one is present.
-                while (len >= 2 && targetTypes[len - 1].flags & 96 /* Nullable */) {
-                    var related = isRelatedTo(source, targetTypes[len - 1], /*reportErrors*/ false);
-                    if (related) {
-                        return related;
-                    }
-                    len--;
-                }
-                // Now check the non-nullable types and report errors on the last one.
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(source, targetTypes[i], reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
-                    }
-                }
-                return 0 /* False */;
-            }
-            function typeRelatedToEachType(source, target, reportErrors) {
-                var result = -1 /* True */;
-                var targetTypes = target.types;
-                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
-                    var targetType = targetTypes_1[_i];
-                    var related = isRelatedTo(source, targetType, reportErrors);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function someTypeRelatedToType(source, target, reportErrors) {
-                var sourceTypes = source.types;
-                var len = sourceTypes.length;
-                // The null and undefined types are guaranteed to be at the end of the constituent type list. In order
-                // to produce the best possible errors we first check the nullable types, such that the last type we
-                // check and report errors from is a non-nullable type if one is present.
-                while (len >= 2 && sourceTypes[len - 1].flags & 96 /* Nullable */) {
-                    var related = isRelatedTo(sourceTypes[len - 1], target, /*reportErrors*/ false);
-                    if (related) {
-                        return related;
-                    }
-                    len--;
-                }
-                // Now check the non-nullable types and report errors on the last one.
-                for (var i = 0; i < len; i++) {
-                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
-                    if (related) {
-                        return related;
-                    }
-                }
-                return 0 /* False */;
-            }
-            function eachTypeRelatedToType(source, target, reportErrors) {
-                var result = -1 /* True */;
-                var sourceTypes = source.types;
-                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
-                    var sourceType = sourceTypes_2[_i];
-                    var related = isRelatedTo(sourceType, target, reportErrors);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function typeArgumentsRelatedTo(source, target, reportErrors) {
-                var sources = source.typeArguments || emptyArray;
-                var targets = target.typeArguments || emptyArray;
-                if (sources.length !== targets.length && relation === identityRelation) {
-                    return 0 /* False */;
-                }
-                var length = sources.length <= targets.length ? sources.length : targets.length;
-                var result = -1 /* True */;
-                for (var i = 0; i < length; i++) {
-                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            // Determine if two object types are related by structure. First, check if the result is already available in the global cache.
-            // Second, check if we have already started a comparison of the given two types in which case we assume the result to be true.
-            // Third, check if both types are part of deeply nested chains of generic type instantiations and if so assume the types are
-            // equal and infinitely expanding. Fourth, if we have reached a depth of 100 nested comparisons, assume we have runaway recursion
-            // and issue an error. Otherwise, actually compare the structure of the two types.
-            function objectTypeRelatedTo(source, originalSource, target, reportErrors) {
-                if (overflow) {
-                    return 0 /* False */;
-                }
-                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
-                var related = relation[id];
-                if (related !== undefined) {
-                    if (reportErrors && related === 2 /* Failed */) {
-                        // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported
-                        // failure and continue computing the relation such that errors get reported.
-                        relation[id] = 3 /* FailedAndReported */;
-                    }
-                    else {
-                        return related === 1 /* Succeeded */ ? -1 /* True */ : 0 /* False */;
-                    }
-                }
-                if (depth > 0) {
-                    for (var i = 0; i < depth; i++) {
-                        // If source and target are already being compared, consider them related with assumptions
-                        if (maybeStack[i][id]) {
-                            return 1 /* Maybe */;
-                        }
-                    }
-                    if (depth === 100) {
-                        overflow = true;
-                        return 0 /* False */;
-                    }
-                }
-                else {
-                    sourceStack = [];
-                    targetStack = [];
-                    maybeStack = [];
-                    expandingFlags = 0;
-                }
-                sourceStack[depth] = source;
-                targetStack[depth] = target;
-                maybeStack[depth] = {};
-                maybeStack[depth][id] = 1 /* Succeeded */;
-                depth++;
-                var saveExpandingFlags = expandingFlags;
-                if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth))
-                    expandingFlags |= 1;
-                if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth))
-                    expandingFlags |= 2;
-                var result;
-                if (expandingFlags === 3) {
-                    result = 1 /* Maybe */;
-                }
-                else {
-                    result = propertiesRelatedTo(source, target, reportErrors);
-                    if (result) {
-                        result &= signaturesRelatedTo(source, target, 0 /* Call */, reportErrors);
-                        if (result) {
-                            result &= signaturesRelatedTo(source, target, 1 /* Construct */, reportErrors);
-                            if (result) {
-                                result &= indexTypesRelatedTo(source, originalSource, target, 0 /* String */, reportErrors);
-                                if (result) {
-                                    result &= indexTypesRelatedTo(source, originalSource, target, 1 /* Number */, reportErrors);
-                                }
-                            }
-                        }
-                    }
-                }
-                expandingFlags = saveExpandingFlags;
-                depth--;
-                if (result) {
-                    var maybeCache = maybeStack[depth];
-                    // If result is definitely true, copy assumptions to global cache, else copy to next level up
-                    var destinationCache = (result === -1 /* True */ || depth === 0) ? relation : maybeStack[depth - 1];
-                    ts.copyMap(maybeCache, destinationCache);
-                }
-                else {
-                    // A false result goes straight into global cache (when something is false under assumptions it
-                    // will also be false without assumptions)
-                    relation[id] = reportErrors ? 3 /* FailedAndReported */ : 2 /* Failed */;
-                }
-                return result;
-            }
-            function propertiesRelatedTo(source, target, reportErrors) {
-                if (relation === identityRelation) {
-                    return propertiesIdenticalTo(source, target);
-                }
-                var result = -1 /* True */;
-                var properties = getPropertiesOfObjectType(target);
-                var requireOptionalProperties = relation === subtypeRelation && !(source.flags & 524288 /* ObjectLiteral */);
-                for (var _i = 0, properties_1 = properties; _i < properties_1.length; _i++) {
-                    var targetProp = properties_1[_i];
-                    var sourceProp = getPropertyOfType(source, targetProp.name);
-                    if (sourceProp !== targetProp) {
-                        if (!sourceProp) {
-                            if (!(targetProp.flags & 536870912 /* Optional */) || requireOptionalProperties) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
-                                }
-                                return 0 /* False */;
-                            }
-                        }
-                        else if (!(targetProp.flags & 134217728 /* Prototype */)) {
-                            var sourcePropFlags = getDeclarationFlagsFromSymbol(sourceProp);
-                            var targetPropFlags = getDeclarationFlagsFromSymbol(targetProp);
-                            if (sourcePropFlags & 8 /* Private */ || targetPropFlags & 8 /* Private */) {
-                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
-                                    if (reportErrors) {
-                                        if (sourcePropFlags & 8 /* Private */ && targetPropFlags & 8 /* Private */) {
-                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
-                                        }
-                                        else {
-                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 /* Private */ ? source : target), typeToString(sourcePropFlags & 8 /* Private */ ? target : source));
-                                        }
-                                    }
-                                    return 0 /* False */;
-                                }
-                            }
-                            else if (targetPropFlags & 16 /* Protected */) {
-                                var sourceDeclaredInClass = sourceProp.parent && sourceProp.parent.flags & 32 /* Class */;
-                                var sourceClass = sourceDeclaredInClass ? getDeclaredTypeOfSymbol(getParentOfSymbol(sourceProp)) : undefined;
-                                var targetClass = getDeclaredTypeOfSymbol(getParentOfSymbol(targetProp));
-                                if (!sourceClass || !hasBaseType(sourceClass, targetClass)) {
-                                    if (reportErrors) {
-                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(sourceClass || source), typeToString(targetClass));
-                                    }
-                                    return 0 /* False */;
-                                }
-                            }
-                            else if (sourcePropFlags & 16 /* Protected */) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0 /* False */;
-                            }
-                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
-                            if (!related) {
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
-                                }
-                                return 0 /* False */;
-                            }
-                            result &= related;
-                            if (sourceProp.flags & 536870912 /* Optional */ && !(targetProp.flags & 536870912 /* Optional */)) {
-                                // TypeScript 1.0 spec (April 2014): 3.8.3
-                                // S is a subtype of a type T, and T is a supertype of S if ...
-                                // S' and T are object types and, for each member M in T..
-                                // M is a property and S' contains a property N where
-                                // if M is a required property, N is also a required property
-                                // (M - property in T)
-                                // (N - property in S)
-                                if (reportErrors) {
-                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
-                                }
-                                return 0 /* False */;
-                            }
-                        }
-                    }
-                }
-                return result;
-            }
-            function propertiesIdenticalTo(source, target) {
-                if (!(source.flags & 80896 /* ObjectType */ && target.flags & 80896 /* ObjectType */)) {
-                    return 0 /* False */;
-                }
-                var sourceProperties = getPropertiesOfObjectType(source);
-                var targetProperties = getPropertiesOfObjectType(target);
-                if (sourceProperties.length !== targetProperties.length) {
-                    return 0 /* False */;
-                }
-                var result = -1 /* True */;
-                for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
-                    var sourceProp = sourceProperties_1[_i];
-                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
-                    if (!targetProp) {
-                        return 0 /* False */;
-                    }
-                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function signaturesRelatedTo(source, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return signaturesIdenticalTo(source, target, kind);
-                }
-                if (target === anyFunctionType || source === anyFunctionType) {
-                    return -1 /* True */;
-                }
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (kind === 1 /* Construct */ && sourceSignatures.length && targetSignatures.length) {
-                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
-                        // An abstract constructor type is not assignable to a non-abstract constructor type
-                        // as it would otherwise be possible to new an abstract class. Note that the assignability
-                        // check we perform for an extends clause excludes construct signatures from the target,
-                        // so this check never proceeds.
-                        if (reportErrors) {
-                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
-                        }
-                        return 0 /* False */;
-                    }
-                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
-                        return 0 /* False */;
-                    }
-                }
-                var result = -1 /* True */;
-                var saveErrorInfo = errorInfo;
-                outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
-                    var t = targetSignatures_1[_i];
-                    // Only elaborate errors from the first failure
-                    var shouldElaborateErrors = reportErrors;
-                    for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
-                        var s = sourceSignatures_1[_a];
-                        var related = signatureRelatedTo(s, t, shouldElaborateErrors);
-                        if (related) {
-                            result &= related;
-                            errorInfo = saveErrorInfo;
-                            continue outer;
-                        }
-                        shouldElaborateErrors = false;
-                    }
-                    if (shouldElaborateErrors) {
-                        reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, /*enclosingDeclaration*/ undefined, /*flags*/ undefined, kind));
-                    }
-                    return 0 /* False */;
-                }
-                return result;
-            }
-            /**
-             * See signatureAssignableTo, compareSignaturesIdentical
-             */
-            function signatureRelatedTo(source, target, reportErrors) {
-                return compareSignaturesRelated(source, target, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo);
-            }
-            function signaturesIdenticalTo(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                if (sourceSignatures.length !== targetSignatures.length) {
-                    return 0 /* False */;
-                }
-                var result = -1 /* True */;
-                for (var i = 0, len = sourceSignatures.length; i < len; i++) {
-                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false, isRelatedTo);
-                    if (!related) {
-                        return 0 /* False */;
-                    }
-                    result &= related;
-                }
-                return result;
-            }
-            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
-                var result = -1 /* True */;
-                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
-                    var prop = _a[_i];
-                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
-                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
-                        if (!related) {
-                            if (reportErrors) {
-                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
-                            }
-                            return 0 /* False */;
-                        }
-                        result &= related;
-                    }
-                }
-                return result;
-            }
-            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
-                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
-                if (!related && reportErrors) {
-                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
-                }
-                return related;
-            }
-            function indexTypesRelatedTo(source, originalSource, target, kind, reportErrors) {
-                if (relation === identityRelation) {
-                    return indexTypesIdenticalTo(source, target, kind);
-                }
-                var targetInfo = getIndexInfoOfType(target, kind);
-                if (!targetInfo || ((targetInfo.type.flags & 1 /* Any */) && !(originalSource.flags & 16777726 /* Primitive */))) {
-                    // Index signature of type any permits assignment from everything but primitives
-                    return -1 /* True */;
-                }
-                var sourceInfo = getIndexInfoOfType(source, kind) ||
-                    kind === 1 /* Number */ && getIndexInfoOfType(source, 0 /* String */);
-                if (sourceInfo) {
-                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
-                }
-                if (isObjectLiteralType(source)) {
-                    var related = -1 /* True */;
-                    if (kind === 0 /* String */) {
-                        var sourceNumberInfo = getIndexInfoOfType(source, 1 /* Number */);
-                        if (sourceNumberInfo) {
-                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
-                        }
-                    }
-                    if (related) {
-                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
-                    }
-                    return related;
-                }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
-                }
-                return 0 /* False */;
-            }
-            function indexTypesIdenticalTo(source, target, indexKind) {
-                var targetInfo = getIndexInfoOfType(target, indexKind);
-                var sourceInfo = getIndexInfoOfType(source, indexKind);
-                if (!sourceInfo && !targetInfo) {
-                    return -1 /* True */;
-                }
-                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
-                    return isRelatedTo(sourceInfo.type, targetInfo.type);
-                }
-                return 0 /* False */;
-            }
-            function enumRelatedTo(source, target, reportErrors) {
-                if (source.symbol.name !== target.symbol.name ||
-                    source.symbol.flags & 128 /* ConstEnum */ ||
-                    target.symbol.flags & 128 /* ConstEnum */) {
-                    return 0 /* False */;
-                }
-                var targetEnumType = getTypeOfSymbol(target.symbol);
-                for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
-                    var property = _a[_i];
-                    if (property.flags & 8 /* EnumMember */) {
-                        var targetProperty = getPropertyOfType(targetEnumType, property.name);
-                        if (!targetProperty || !(targetProperty.flags & 8 /* EnumMember */)) {
-                            if (reportErrors) {
-                                reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */));
-                            }
-                            return 0 /* False */;
-                        }
-                    }
-                }
-                return -1 /* True */;
-            }
-            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
-                if (!sourceSignature.declaration || !targetSignature.declaration) {
-                    return true;
-                }
-                var sourceAccessibility = sourceSignature.declaration.flags & (8 /* Private */ | 16 /* Protected */);
-                var targetAccessibility = targetSignature.declaration.flags & (8 /* Private */ | 16 /* Protected */);
-                // A public, protected and private signature is assignable to a private signature.
-                if (targetAccessibility === 8 /* Private */) {
-                    return true;
-                }
-                // A public and protected signature is assignable to a protected signature.
-                if (targetAccessibility === 16 /* Protected */ && sourceAccessibility !== 8 /* Private */) {
-                    return true;
-                }
-                // Only a public signature is assignable to public signature.
-                if (targetAccessibility !== 16 /* Protected */ && !sourceAccessibility) {
-                    return true;
-                }
-                if (reportErrors) {
-                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
-                }
-                return false;
-            }
-        }
-        // Return true if the given type is the constructor type for an abstract class
-        function isAbstractConstructorType(type) {
-            if (type.flags & 65536 /* Anonymous */) {
-                var symbol = type.symbol;
-                if (symbol && symbol.flags & 32 /* Class */) {
-                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
-                    if (declaration && declaration.flags & 128 /* Abstract */) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        // Return true if the given type is part of a deeply nested chain of generic instantiations. We consider this to be the case
-        // when structural type comparisons have been started for 10 or more instantiations of the same generic type. It is possible,
-        // though highly unlikely, for this test to be true in a situation where a chain of instantiations is not infinitely expanding.
-        // Effectively, we will generate a false positive when two types are structurally equal to at least 10 levels, but unequal at
-        // some level beyond that.
-        function isDeeplyNestedGeneric(type, stack, depth) {
-            // We track type references (created by createTypeReference) and instantiated types (created by instantiateType)
-            if (type.flags & (4096 /* Reference */ | 131072 /* Instantiated */) && depth >= 5) {
-                var symbol = type.symbol;
-                var count = 0;
-                for (var i = 0; i < depth; i++) {
-                    var t = stack[i];
-                    if (t.flags & (4096 /* Reference */ | 131072 /* Instantiated */) && t.symbol === symbol) {
-                        count++;
-                        if (count >= 5)
-                            return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isPropertyIdenticalTo(sourceProp, targetProp) {
-            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0 /* False */;
-        }
-        function compareProperties(sourceProp, targetProp, compareTypes) {
-            // Two members are considered identical when
-            // - they are public properties with identical names, optionality, and types,
-            // - they are private or protected properties originating in the same declaration and having identical types
-            if (sourceProp === targetProp) {
-                return -1 /* True */;
-            }
-            var sourcePropAccessibility = getDeclarationFlagsFromSymbol(sourceProp) & (8 /* Private */ | 16 /* Protected */);
-            var targetPropAccessibility = getDeclarationFlagsFromSymbol(targetProp) & (8 /* Private */ | 16 /* Protected */);
-            if (sourcePropAccessibility !== targetPropAccessibility) {
-                return 0 /* False */;
-            }
-            if (sourcePropAccessibility) {
-                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
-                    return 0 /* False */;
-                }
-            }
-            else {
-                if ((sourceProp.flags & 536870912 /* Optional */) !== (targetProp.flags & 536870912 /* Optional */)) {
-                    return 0 /* False */;
-                }
-            }
-            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
-                return 0 /* False */;
-            }
-            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
-        }
-        function isMatchingSignature(source, target, partialMatch) {
-            // A source signature matches a target signature if the two signatures have the same number of required,
-            // optional, and rest parameters.
-            if (source.parameters.length === target.parameters.length &&
-                source.minArgumentCount === target.minArgumentCount &&
-                source.hasRestParameter === target.hasRestParameter) {
-                return true;
-            }
-            // A source signature partially matches a target signature if the target signature has no fewer required
-            // parameters and no more overall parameters than the source signature (where a signature with a rest
-            // parameter is always considered to have more overall parameters than one without).
-            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (source.hasRestParameter && !target.hasRestParameter ||
-                source.hasRestParameter === target.hasRestParameter && source.parameters.length >= target.parameters.length)) {
-                return true;
-            }
-            return false;
-        }
-        /**
-         * See signatureRelatedTo, compareSignaturesIdentical
-         */
-        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
-            // TODO (drosen): De-duplicate code between related functions.
-            if (source === target) {
-                return -1 /* True */;
-            }
-            if (!(isMatchingSignature(source, target, partialMatch))) {
-                return 0 /* False */;
-            }
-            // Check that the two signatures have the same number of type parameters. We might consider
-            // also checking that any type parameter constraints match, but that would require instantiating
-            // the constraints with a common set of type arguments to get relatable entities in places where
-            // type parameters occur in the constraints. The complexity of doing that doesn't seem worthwhile,
-            // particularly as we're comparing erased versions of the signatures below.
-            if ((source.typeParameters ? source.typeParameters.length : 0) !== (target.typeParameters ? target.typeParameters.length : 0)) {
-                return 0 /* False */;
-            }
-            // Spec 1.0 Section 3.8.3 & 3.8.4:
-            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
-            source = getErasedSignature(source);
-            target = getErasedSignature(target);
-            var result = -1 /* True */;
-            if (!ignoreThisTypes && source.thisType && target.thisType) {
-                var related = compareTypes(source.thisType, target.thisType);
-                if (!related) {
-                    return 0 /* False */;
-                }
-                result &= related;
-            }
-            var targetLen = target.parameters.length;
-            for (var i = 0; i < targetLen; i++) {
-                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
-                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
-                var related = compareTypes(s, t);
-                if (!related) {
-                    return 0 /* False */;
-                }
-                result &= related;
-            }
-            if (!ignoreReturnTypes) {
-                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
-            }
-            return result;
-        }
-        function isRestParameterIndex(signature, parameterIndex) {
-            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
-        }
-        function isSupertypeOfEach(candidate, types) {
-            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
-                var t = types_5[_i];
-                if (candidate !== t && !isTypeSubtypeOf(t, candidate))
-                    return false;
-            }
-            return true;
-        }
-        function getCombinedFlagsOfTypes(types) {
-            var flags = 0;
-            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
-                var t = types_6[_i];
-                flags |= t.flags;
-            }
-            return flags;
-        }
-        function getCommonSupertype(types) {
-            if (!strictNullChecks) {
-                return ts.forEach(types, function (t) { return isSupertypeOfEach(t, types) ? t : undefined; });
-            }
-            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 96 /* Nullable */); });
-            if (!primaryTypes.length) {
-                return getUnionType(types);
-            }
-            var supertype = ts.forEach(primaryTypes, function (t) { return isSupertypeOfEach(t, primaryTypes) ? t : undefined; });
-            return supertype && addNullableKind(supertype, getCombinedFlagsOfTypes(types) & 96 /* Nullable */);
-        }
-        function reportNoCommonSupertypeError(types, errorLocation, errorMessageChainHead) {
-            // The downfallType/bestSupertypeDownfallType is the first type that caused a particular candidate
-            // to not be the common supertype. So if it weren't for this one downfallType (and possibly others),
-            // the type in question could have been the common supertype.
-            var bestSupertype;
-            var bestSupertypeDownfallType;
-            var bestSupertypeScore = 0;
-            for (var i = 0; i < types.length; i++) {
-                var score = 0;
-                var downfallType = undefined;
-                for (var j = 0; j < types.length; j++) {
-                    if (isTypeSubtypeOf(types[j], types[i])) {
-                        score++;
-                    }
-                    else if (!downfallType) {
-                        downfallType = types[j];
-                    }
-                }
-                ts.Debug.assert(!!downfallType, "If there is no common supertype, each type should have a downfallType");
-                if (score > bestSupertypeScore) {
-                    bestSupertype = types[i];
-                    bestSupertypeDownfallType = downfallType;
-                    bestSupertypeScore = score;
-                }
-                // types.length - 1 is the maximum score, given that getCommonSupertype returned false
-                if (bestSupertypeScore === types.length - 1) {
-                    break;
-                }
-            }
-            // In the following errors, the {1} slot is before the {0} slot because checkTypeSubtypeOf supplies the
-            // subtype as the first argument to the error
-            checkTypeSubtypeOf(bestSupertypeDownfallType, bestSupertype, errorLocation, ts.Diagnostics.Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0, errorMessageChainHead);
-        }
-        function isArrayType(type) {
-            return type.flags & 4096 /* Reference */ && type.target === globalArrayType;
-        }
-        function isArrayLikeType(type) {
-            // A type is array-like if it is a reference to the global Array or global ReadonlyArray type,
-            // or if it is not the undefined or null type and if it is assignable to ReadonlyArray<any>
-            return type.flags & 4096 /* Reference */ && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
-                !(type.flags & 96 /* Nullable */) && isTypeAssignableTo(type, anyReadonlyArrayType);
-        }
-        function isTupleLikeType(type) {
-            return !!getPropertyOfType(type, "0");
-        }
-        function isStringLiteralType(type) {
-            return type.flags & 256 /* StringLiteral */;
-        }
-        /**
-         * Check if a Type was written as a tuple type literal.
-         * Prefer using isTupleLikeType() unless the use of `elementTypes` is required.
-         */
-        function isTupleType(type) {
-            return !!(type.flags & 8192 /* Tuple */);
-        }
-        function getNullableKind(type) {
-            var flags = type.flags;
-            if (flags & 16384 /* Union */) {
-                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    flags |= t.flags;
-                }
-            }
-            return flags & 96 /* Nullable */;
-        }
-        function addNullableKind(type, kind) {
-            if ((getNullableKind(type) & kind) !== kind) {
-                var types = [type];
-                if (kind & 32 /* Undefined */) {
-                    types.push(undefinedType);
-                }
-                if (kind & 64 /* Null */) {
-                    types.push(nullType);
-                }
-                type = getUnionType(types);
-            }
-            return type;
-        }
-        function getNonNullableType(type) {
-            return strictNullChecks ? getTypeWithFacts(type, 524288 /* NEUndefinedOrNull */) : type;
-        }
-        /**
-         * Return true if type was inferred from an object literal or written as an object type literal
-         * with no call or construct signatures.
-         */
-        function isObjectLiteralType(type) {
-            return type.symbol && (type.symbol.flags & (4096 /* ObjectLiteral */ | 2048 /* TypeLiteral */)) !== 0 &&
-                getSignaturesOfType(type, 0 /* Call */).length === 0 &&
-                getSignaturesOfType(type, 1 /* Construct */).length === 0;
-        }
-        function createTransientSymbol(source, type) {
-            var symbol = createSymbol(source.flags | 67108864 /* Transient */, source.name);
-            symbol.declarations = source.declarations;
-            symbol.parent = source.parent;
-            symbol.type = type;
-            symbol.target = source;
-            if (source.valueDeclaration) {
-                symbol.valueDeclaration = source.valueDeclaration;
-            }
-            return symbol;
-        }
-        function transformTypeOfMembers(type, f) {
-            var members = {};
-            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
-                var property = _a[_i];
-                var original = getTypeOfSymbol(property);
-                var updated = f(original);
-                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
-            }
-            ;
-            return members;
-        }
-        /**
-         * If the the provided object literal is subject to the excess properties check,
-         * create a new that is exempt. Recursively mark object literal members as exempt.
-         * Leave signatures alone since they are not subject to the check.
-         */
-        function getRegularTypeOfObjectLiteral(type) {
-            if (!(type.flags & 1048576 /* FreshObjectLiteral */)) {
-                return type;
-            }
-            var regularType = type.regularType;
-            if (regularType) {
-                return regularType;
-            }
-            var resolved = type;
-            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
-            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
-            regularNew.flags = resolved.flags & ~1048576 /* FreshObjectLiteral */;
-            type.regularType = regularNew;
-            return regularNew;
-        }
-        function getWidenedTypeOfObjectLiteral(type) {
-            var members = transformTypeOfMembers(type, function (prop) {
-                var widened = getWidenedType(prop);
-                return prop === widened ? prop : widened;
-            });
-            var stringIndexInfo = getIndexInfoOfType(type, 0 /* String */);
-            var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
-            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
-        }
-        function getWidenedConstituentType(type) {
-            return type.flags & 96 /* Nullable */ ? type : getWidenedType(type);
-        }
-        function getWidenedType(type) {
-            if (type.flags & 6291456 /* RequiresWidening */) {
-                if (type.flags & 96 /* Nullable */) {
-                    return anyType;
-                }
-                if (type.flags & 524288 /* ObjectLiteral */) {
-                    return getWidenedTypeOfObjectLiteral(type);
-                }
-                if (type.flags & 16384 /* Union */) {
-                    return getUnionType(ts.map(type.types, getWidenedConstituentType), /*noSubtypeReduction*/ true);
-                }
-                if (isArrayType(type)) {
-                    return createArrayType(getWidenedType(type.typeArguments[0]));
-                }
-                if (isTupleType(type)) {
-                    return createTupleType(ts.map(type.elementTypes, getWidenedType));
-                }
-            }
-            return type;
-        }
-        /**
-         * Reports implicit any errors that occur as a result of widening 'null' and 'undefined'
-         * to 'any'. A call to reportWideningErrorsInType is normally accompanied by a call to
-         * getWidenedType. But in some cases getWidenedType is called without reporting errors
-         * (type argument inference is an example).
-         *
-         * The return value indicates whether an error was in fact reported. The particular circumstances
-         * are on a best effort basis. Currently, if the null or undefined that causes widening is inside
-         * an object literal property (arbitrarily deeply), this function reports an error. If no error is
-         * reported, reportImplicitAnyError is a suitable fallback to report a general error.
-         */
-        function reportWideningErrorsInType(type) {
-            var errorReported = false;
-            if (type.flags & 16384 /* Union */) {
-                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                    var t = _a[_i];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
-            }
-            if (isArrayType(type)) {
-                return reportWideningErrorsInType(type.typeArguments[0]);
-            }
-            if (isTupleType(type)) {
-                for (var _b = 0, _c = type.elementTypes; _b < _c.length; _b++) {
-                    var t = _c[_b];
-                    if (reportWideningErrorsInType(t)) {
-                        errorReported = true;
-                    }
-                }
-            }
-            if (type.flags & 524288 /* ObjectLiteral */) {
-                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
-                    var p = _e[_d];
-                    var t = getTypeOfSymbol(p);
-                    if (t.flags & 2097152 /* ContainsUndefinedOrNull */) {
-                        if (!reportWideningErrorsInType(t)) {
-                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
-                        }
-                        errorReported = true;
-                    }
-                }
-            }
-            return errorReported;
-        }
-        function reportImplicitAnyError(declaration, type) {
-            var typeAsString = typeToString(getWidenedType(type));
-            var diagnostic;
-            switch (declaration.kind) {
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
-                    break;
-                case 142 /* Parameter */:
-                    diagnostic = declaration.dotDotDotToken ?
-                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
-                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
-                    break;
-                case 169 /* BindingElement */:
-                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
-                    break;
-                case 220 /* FunctionDeclaration */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    if (!declaration.name) {
-                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
-                        return;
-                    }
-                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
-                    break;
-                default:
-                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
-            }
-            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
-        }
-        function reportErrorsFromWidening(declaration, type) {
-            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & 2097152 /* ContainsUndefinedOrNull */) {
-                // Report implicit any error within type if possible, otherwise report error on declaration
-                if (!reportWideningErrorsInType(type)) {
-                    reportImplicitAnyError(declaration, type);
-                }
-            }
-        }
-        function forEachMatchingParameterType(source, target, callback) {
-            var sourceMax = source.parameters.length;
-            var targetMax = target.parameters.length;
-            var count;
-            if (source.hasRestParameter && target.hasRestParameter) {
-                count = Math.max(sourceMax, targetMax);
-            }
-            else if (source.hasRestParameter) {
-                count = targetMax;
-            }
-            else if (target.hasRestParameter) {
-                count = sourceMax;
-            }
-            else {
-                count = Math.min(sourceMax, targetMax);
-            }
-            for (var i = 0; i < count; i++) {
-                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
-            }
-        }
-        function createInferenceContext(typeParameters, inferUnionTypes) {
-            var inferences = ts.map(typeParameters, createTypeInferencesObject);
-            return {
-                typeParameters: typeParameters,
-                inferUnionTypes: inferUnionTypes,
-                inferences: inferences,
-                inferredTypes: new Array(typeParameters.length)
-            };
-        }
-        function createTypeInferencesObject() {
-            return {
-                primary: undefined,
-                secondary: undefined,
-                isFixed: false
-            };
-        }
-        function inferTypes(context, source, target) {
-            var sourceStack;
-            var targetStack;
-            var depth = 0;
-            var inferiority = 0;
-            var visited = {};
-            inferFromTypes(source, target);
-            function isInProcess(source, target) {
-                for (var i = 0; i < depth; i++) {
-                    if (source === sourceStack[i] && target === targetStack[i]) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function inferFromTypes(source, target) {
-                if (source.flags & 16384 /* Union */ && target.flags & 16384 /* Union */ ||
-                    source.flags & 32768 /* Intersection */ && target.flags & 32768 /* Intersection */) {
-                    // Source and target are both unions or both intersections. First, find each
-                    // target constituent type that has an identically matching source constituent
-                    // type, and for each such target constituent type infer from the type to itself.
-                    // When inferring from a type to itself we effectively find all type parameter
-                    // occurrences within that type and infer themselves as their type arguments.
-                    var matchingTypes = void 0;
-                    for (var _i = 0, _a = target.types; _i < _a.length; _i++) {
-                        var t = _a[_i];
-                        if (typeIdenticalToSomeType(t, source.types)) {
-                            (matchingTypes || (matchingTypes = [])).push(t);
-                            inferFromTypes(t, t);
-                        }
-                    }
-                    // Next, to improve the quality of inferences, reduce the source and target types by
-                    // removing the identically matched constituents. For example, when inferring from
-                    // 'string | string[]' to 'string | T' we reduce the types to 'string[]' and 'T'.
-                    if (matchingTypes) {
-                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
-                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
-                    }
-                }
-                if (target.flags & 512 /* TypeParameter */) {
-                    // If target is a type parameter, make an inference, unless the source type contains
-                    // the anyFunctionType (the wildcard type that's used to avoid contextually typing functions).
-                    // Because the anyFunctionType is internal, it should not be exposed to the user by adding
-                    // it as an inference candidate. Hopefully, a better candidate will come along that does
-                    // not contain anyFunctionType when we come back to this argument for its second round
-                    // of inference.
-                    if (source.flags & 8388608 /* ContainsAnyFunctionType */) {
-                        return;
-                    }
-                    var typeParameters = context.typeParameters;
-                    for (var i = 0; i < typeParameters.length; i++) {
-                        if (target === typeParameters[i]) {
-                            var inferences = context.inferences[i];
-                            if (!inferences.isFixed) {
-                                // Any inferences that are made to a type parameter in a union type are inferior
-                                // to inferences made to a flat (non-union) type. This is because if we infer to
-                                // T | string[], we really don't know if we should be inferring to T or not (because
-                                // the correct constituent on the target side could be string[]). Therefore, we put
-                                // such inferior inferences into a secondary bucket, and only use them if the primary
-                                // bucket is empty.
-                                var candidates = inferiority ?
-                                    inferences.secondary || (inferences.secondary = []) :
-                                    inferences.primary || (inferences.primary = []);
-                                if (!ts.contains(candidates, source)) {
-                                    candidates.push(source);
-                                }
-                            }
-                            return;
-                        }
-                    }
-                }
-                else if (source.flags & 4096 /* Reference */ && target.flags & 4096 /* Reference */ && source.target === target.target) {
-                    // If source and target are references to the same generic type, infer from type arguments
-                    var sourceTypes = source.typeArguments || emptyArray;
-                    var targetTypes = target.typeArguments || emptyArray;
-                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
-                    for (var i = 0; i < count; i++) {
-                        inferFromTypes(sourceTypes[i], targetTypes[i]);
-                    }
-                }
-                else if (source.flags & 8192 /* Tuple */ && target.flags & 8192 /* Tuple */ && source.elementTypes.length === target.elementTypes.length) {
-                    // If source and target are tuples of the same size, infer from element types
-                    var sourceTypes = source.elementTypes;
-                    var targetTypes = target.elementTypes;
-                    for (var i = 0; i < sourceTypes.length; i++) {
-                        inferFromTypes(sourceTypes[i], targetTypes[i]);
-                    }
-                }
-                else if (target.flags & 49152 /* UnionOrIntersection */) {
-                    var targetTypes = target.types;
-                    var typeParameterCount = 0;
-                    var typeParameter = void 0;
-                    // First infer to each type in union or intersection that isn't a type parameter
-                    for (var _b = 0, targetTypes_2 = targetTypes; _b < targetTypes_2.length; _b++) {
-                        var t = targetTypes_2[_b];
-                        if (t.flags & 512 /* TypeParameter */ && ts.contains(context.typeParameters, t)) {
-                            typeParameter = t;
-                            typeParameterCount++;
-                        }
-                        else {
-                            inferFromTypes(source, t);
-                        }
-                    }
-                    // Next, if target containings a single naked type parameter, make a secondary inference to that type
-                    // parameter. This gives meaningful results for union types in co-variant positions and intersection
-                    // types in contra-variant positions (such as callback parameters).
-                    if (typeParameterCount === 1) {
-                        inferiority++;
-                        inferFromTypes(source, typeParameter);
-                        inferiority--;
-                    }
-                }
-                else if (source.flags & 49152 /* UnionOrIntersection */) {
-                    // Source is a union or intersection type, infer from each constituent type
-                    var sourceTypes = source.types;
-                    for (var _c = 0, sourceTypes_3 = sourceTypes; _c < sourceTypes_3.length; _c++) {
-                        var sourceType = sourceTypes_3[_c];
-                        inferFromTypes(sourceType, target);
-                    }
-                }
-                else {
-                    source = getApparentType(source);
-                    if (source.flags & 80896 /* ObjectType */ && (target.flags & 4096 /* Reference */ && target.typeArguments ||
-                        target.flags & 8192 /* Tuple */ ||
-                        target.flags & 65536 /* Anonymous */ && target.symbol && target.symbol.flags & (8192 /* Method */ | 2048 /* TypeLiteral */ | 32 /* Class */))) {
-                        // If source is an object type, and target is a type reference with type arguments, a tuple type,
-                        // the type of a method, or a type literal, infer from members
-                        if (isInProcess(source, target)) {
-                            return;
-                        }
-                        if (isDeeplyNestedGeneric(source, sourceStack, depth) && isDeeplyNestedGeneric(target, targetStack, depth)) {
-                            return;
-                        }
-                        var key = source.id + "," + target.id;
-                        if (ts.hasProperty(visited, key)) {
-                            return;
-                        }
-                        visited[key] = true;
-                        if (depth === 0) {
-                            sourceStack = [];
-                            targetStack = [];
-                        }
-                        sourceStack[depth] = source;
-                        targetStack[depth] = target;
-                        depth++;
-                        inferFromProperties(source, target);
-                        inferFromSignatures(source, target, 0 /* Call */);
-                        inferFromSignatures(source, target, 1 /* Construct */);
-                        inferFromIndexTypes(source, target);
-                        depth--;
-                    }
-                }
-            }
-            function inferFromProperties(source, target) {
-                var properties = getPropertiesOfObjectType(target);
-                for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
-                    var targetProp = properties_2[_i];
-                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
-                    if (sourceProp) {
-                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
-                    }
-                }
-            }
-            function inferFromSignatures(source, target, kind) {
-                var sourceSignatures = getSignaturesOfType(source, kind);
-                var targetSignatures = getSignaturesOfType(target, kind);
-                var sourceLen = sourceSignatures.length;
-                var targetLen = targetSignatures.length;
-                var len = sourceLen < targetLen ? sourceLen : targetLen;
-                for (var i = 0; i < len; i++) {
-                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
-                }
-            }
-            function inferFromSignature(source, target) {
-                forEachMatchingParameterType(source, target, inferFromTypes);
-                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
-                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
-                }
-                else {
-                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
-                }
-            }
-            function inferFromIndexTypes(source, target) {
-                var targetStringIndexType = getIndexTypeOfType(target, 0 /* String */);
-                if (targetStringIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 0 /* String */) ||
-                        getImplicitIndexTypeOfType(source, 0 /* String */);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetStringIndexType);
-                    }
-                }
-                var targetNumberIndexType = getIndexTypeOfType(target, 1 /* Number */);
-                if (targetNumberIndexType) {
-                    var sourceIndexType = getIndexTypeOfType(source, 1 /* Number */) ||
-                        getIndexTypeOfType(source, 0 /* String */) ||
-                        getImplicitIndexTypeOfType(source, 1 /* Number */);
-                    if (sourceIndexType) {
-                        inferFromTypes(sourceIndexType, targetNumberIndexType);
-                    }
-                }
-            }
-        }
-        function typeIdenticalToSomeType(type, types) {
-            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
-                var t = types_7[_i];
-                if (isTypeIdenticalTo(t, type)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        /**
-         * Return a new union or intersection type computed by removing a given set of types
-         * from a given union or intersection type.
-         */
-        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
-            var reducedTypes = [];
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (!typeIdenticalToSomeType(t, typesToRemove)) {
-                    reducedTypes.push(t);
-                }
-            }
-            return type.flags & 16384 /* Union */ ? getUnionType(reducedTypes, /*noSubtypeReduction*/ true) : getIntersectionType(reducedTypes);
-        }
-        function getInferenceCandidates(context, index) {
-            var inferences = context.inferences[index];
-            return inferences.primary || inferences.secondary || emptyArray;
-        }
-        function getInferredType(context, index) {
-            var inferredType = context.inferredTypes[index];
-            var inferenceSucceeded;
-            if (!inferredType) {
-                var inferences = getInferenceCandidates(context, index);
-                if (inferences.length) {
-                    // Infer widened union or supertype, or the unknown type for no common supertype
-                    var unionOrSuperType = context.inferUnionTypes ? getUnionType(inferences) : getCommonSupertype(inferences);
-                    inferredType = unionOrSuperType ? getWidenedType(unionOrSuperType) : unknownType;
-                    inferenceSucceeded = !!unionOrSuperType;
-                }
-                else {
-                    // Infer the empty object type when no inferences were made. It is important to remember that
-                    // in this case, inference still succeeds, meaning there is no error for not having inference
-                    // candidates. An inference error only occurs when there are *conflicting* candidates, i.e.
-                    // candidates with no common supertype.
-                    inferredType = emptyObjectType;
-                    inferenceSucceeded = true;
-                }
-                context.inferredTypes[index] = inferredType;
-                // Only do the constraint check if inference succeeded (to prevent cascading errors)
-                if (inferenceSucceeded) {
-                    var constraint = getConstraintOfTypeParameter(context.typeParameters[index]);
-                    if (constraint) {
-                        var instantiatedConstraint = instantiateType(constraint, getInferenceMapper(context));
-                        if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
-                            context.inferredTypes[index] = inferredType = instantiatedConstraint;
-                        }
-                    }
-                }
-                else if (context.failedTypeParameterIndex === undefined || context.failedTypeParameterIndex > index) {
-                    // If inference failed, it is necessary to record the index of the failed type parameter (the one we are on).
-                    // It might be that inference has already failed on a later type parameter on a previous call to inferTypeArguments.
-                    // So if this failure is on preceding type parameter, this type parameter is the new failure index.
-                    context.failedTypeParameterIndex = index;
-                }
-            }
-            return inferredType;
-        }
-        function getInferredTypes(context) {
-            for (var i = 0; i < context.inferredTypes.length; i++) {
-                getInferredType(context, i);
-            }
-            return context.inferredTypes;
-        }
-        // EXPRESSION TYPE CHECKING
-        function getResolvedSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 /* Value */ | 1048576 /* ExportValue */, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol;
-            }
-            return links.resolvedSymbol;
-        }
-        function isInTypeQuery(node) {
-            // TypeScript 1.0 spec (April 2014): 3.6.3
-            // A type query consists of the keyword typeof followed by an expression.
-            // The expression is restricted to a single identifier or a sequence of identifiers separated by periods
-            while (node) {
-                switch (node.kind) {
-                    case 158 /* TypeQuery */:
-                        return true;
-                    case 69 /* Identifier */:
-                    case 139 /* QualifiedName */:
-                        node = node.parent;
-                        continue;
-                    default:
-                        return false;
-                }
-            }
-            ts.Debug.fail("should not get here");
-        }
-        // Return the flow cache key for a "dotted name" (i.e. a sequence of identifiers
-        // separated by dots). The key consists of the id of the symbol referenced by the
-        // leftmost identifier followed by zero or more property names separated by dots.
-        // The result is undefined if the reference isn't a dotted name.
-        function getFlowCacheKey(node) {
-            if (node.kind === 69 /* Identifier */) {
-                var symbol = getResolvedSymbol(node);
-                return symbol !== unknownSymbol ? "" + getSymbolId(symbol) : undefined;
-            }
-            if (node.kind === 97 /* ThisKeyword */) {
-                return "0";
-            }
-            if (node.kind === 172 /* PropertyAccessExpression */) {
-                var key = getFlowCacheKey(node.expression);
-                return key && key + "." + node.name.text;
-            }
-            return undefined;
-        }
-        function isNullOrUndefinedLiteral(node) {
-            return node.kind === 93 /* NullKeyword */ ||
-                node.kind === 69 /* Identifier */ && getResolvedSymbol(node) === undefinedSymbol;
-        }
-        function getLeftmostIdentifierOrThis(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                case 97 /* ThisKeyword */:
-                    return node;
-                case 172 /* PropertyAccessExpression */:
-                    return getLeftmostIdentifierOrThis(node.expression);
-            }
-            return undefined;
-        }
-        function isMatchingReference(source, target) {
-            if (source.kind === target.kind) {
-                switch (source.kind) {
-                    case 69 /* Identifier */:
-                        return getResolvedSymbol(source) === getResolvedSymbol(target);
-                    case 97 /* ThisKeyword */:
-                        return true;
-                    case 172 /* PropertyAccessExpression */:
-                        return source.name.text === target.name.text &&
-                            isMatchingReference(source.expression, target.expression);
-                }
-            }
-            return false;
-        }
-        function containsMatchingReference(source, target) {
-            while (source.kind === 172 /* PropertyAccessExpression */) {
-                source = source.expression;
-                if (isMatchingReference(source, target)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function isOrContainsMatchingReference(source, target) {
-            return isMatchingReference(source, target) || containsMatchingReference(source, target);
-        }
-        function hasMatchingArgument(callExpression, reference) {
-            if (callExpression.arguments) {
-                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
-                    var argument = _a[_i];
-                    if (isOrContainsMatchingReference(reference, argument)) {
-                        return true;
-                    }
-                }
-            }
-            if (callExpression.expression.kind === 172 /* PropertyAccessExpression */ &&
-                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
-                return true;
-            }
-            return false;
-        }
-        function getFlowNodeId(flow) {
-            if (!flow.id) {
-                flow.id = nextFlowId;
-                nextFlowId++;
-            }
-            return flow.id;
-        }
-        function typeMaybeAssignableTo(source, target) {
-            if (!(source.flags & 16384 /* Union */)) {
-                return isTypeAssignableTo(source, target);
-            }
-            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (isTypeAssignableTo(t, target)) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        // Remove those constituent types of declaredType to which no constituent type of assignedType is assignable.
-        // For example, when a variable of type number | string | boolean is assigned a value of type number | boolean,
-        // we remove type string.
-        function getAssignmentReducedType(declaredType, assignedType) {
-            if (declaredType !== assignedType && declaredType.flags & 16384 /* Union */) {
-                var reducedTypes = ts.filter(declaredType.types, function (t) { return typeMaybeAssignableTo(assignedType, t); });
-                if (reducedTypes.length) {
-                    return reducedTypes.length === 1 ? reducedTypes[0] : getUnionType(reducedTypes);
-                }
-            }
-            return declaredType;
-        }
-        function getTypeFacts(type) {
-            var flags = type.flags;
-            if (flags & 258 /* StringLike */) {
-                return strictNullChecks ? 4079361 /* StringStrictFacts */ : 4194049 /* StringFacts */;
-            }
-            if (flags & 132 /* NumberLike */) {
-                return strictNullChecks ? 4079234 /* NumberStrictFacts */ : 4193922 /* NumberFacts */;
-            }
-            if (flags & 8 /* Boolean */) {
-                return strictNullChecks ? 4078980 /* BooleanStrictFacts */ : 4193668 /* BooleanFacts */;
-            }
-            if (flags & 80896 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                return resolved.callSignatures.length || resolved.constructSignatures.length || isTypeSubtypeOf(type, globalFunctionType) ?
-                    strictNullChecks ? 1970144 /* FunctionStrictFacts */ : 4181984 /* FunctionFacts */ :
-                    strictNullChecks ? 1972176 /* ObjectStrictFacts */ : 4184016 /* ObjectFacts */;
-            }
-            if (flags & (16 /* Void */ | 32 /* Undefined */)) {
-                return 2457472 /* UndefinedFacts */;
-            }
-            if (flags & 64 /* Null */) {
-                return 2340752 /* NullFacts */;
-            }
-            if (flags & 16777216 /* ESSymbol */) {
-                return strictNullChecks ? 1981320 /* SymbolStrictFacts */ : 4193160 /* SymbolFacts */;
-            }
-            if (flags & 512 /* TypeParameter */) {
-                var constraint = getConstraintOfTypeParameter(type);
-                return constraint ? getTypeFacts(constraint) : 4194303 /* All */;
-            }
-            if (flags & 32768 /* Intersection */) {
-                return ts.reduceLeft(type.types, function (flags, type) { return flags |= getTypeFacts(type); }, 0 /* None */);
-            }
-            return 4194303 /* All */;
-        }
-        function getTypeWithFacts(type, include) {
-            if (!(type.flags & 16384 /* Union */)) {
-                return getTypeFacts(type) & include ? type : neverType;
-            }
-            var firstType;
-            var types;
-            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                var t = _a[_i];
-                if (getTypeFacts(t) & include) {
-                    if (!firstType) {
-                        firstType = t;
-                    }
-                    else {
-                        if (!types) {
-                            types = [firstType];
-                        }
-                        types.push(t);
-                    }
-                }
-            }
-            return firstType ? types ? getUnionType(types, /*noSubtypeReduction*/ true) : firstType : neverType;
-        }
-        function getTypeWithDefault(type, defaultExpression) {
-            if (defaultExpression) {
-                var defaultType = checkExpression(defaultExpression);
-                return getUnionType([getTypeWithFacts(type, 131072 /* NEUndefined */), defaultType]);
-            }
-            return type;
-        }
-        function getTypeOfDestructuredProperty(type, name) {
-            var text = getTextOfPropertyName(name);
-            return getTypeOfPropertyOfType(type, text) ||
-                isNumericLiteralName(text) && getIndexTypeOfType(type, 1 /* Number */) ||
-                getIndexTypeOfType(type, 0 /* String */) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredArrayElement(type, index) {
-            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
-                checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) ||
-                unknownType;
-        }
-        function getTypeOfDestructuredSpreadElement(type) {
-            return createArrayType(checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) || unknownType);
-        }
-        function getAssignedTypeOfBinaryExpression(node) {
-            return node.parent.kind === 170 /* ArrayLiteralExpression */ || node.parent.kind === 253 /* PropertyAssignment */ ?
-                getTypeWithDefault(getAssignedType(node), node.right) :
-                checkExpression(node.right);
-        }
-        function getAssignedTypeOfArrayLiteralElement(node, element) {
-            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
-        }
-        function getAssignedTypeOfSpreadElement(node) {
-            return getTypeOfDestructuredSpreadElement(getAssignedType(node.parent));
-        }
-        function getAssignedTypeOfPropertyAssignment(node) {
-            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
-        }
-        function getAssignedTypeOfShorthandPropertyAssignment(node) {
-            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
-        }
-        function getAssignedType(node) {
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 207 /* ForInStatement */:
-                    return stringType;
-                case 208 /* ForOfStatement */:
-                    return checkRightHandSideOfForOf(parent.expression) || unknownType;
-                case 187 /* BinaryExpression */:
-                    return getAssignedTypeOfBinaryExpression(parent);
-                case 181 /* DeleteExpression */:
-                    return undefinedType;
-                case 170 /* ArrayLiteralExpression */:
-                    return getAssignedTypeOfArrayLiteralElement(parent, node);
-                case 191 /* SpreadElementExpression */:
-                    return getAssignedTypeOfSpreadElement(parent);
-                case 253 /* PropertyAssignment */:
-                    return getAssignedTypeOfPropertyAssignment(parent);
-                case 254 /* ShorthandPropertyAssignment */:
-                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
-            }
-            return unknownType;
-        }
-        function getInitialTypeOfBindingElement(node) {
-            var pattern = node.parent;
-            var parentType = getInitialType(pattern.parent);
-            var type = pattern.kind === 167 /* ObjectBindingPattern */ ?
-                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
-                !node.dotDotDotToken ?
-                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
-                    getTypeOfDestructuredSpreadElement(parentType);
-            return getTypeWithDefault(type, node.initializer);
-        }
-        function getTypeOfInitializer(node) {
-            // Return the cached type if one is available. If the type of the variable was inferred
-            // from its initializer, we'll already have cached the type. Otherwise we compute it now
-            // without caching such that transient types are reflected.
-            var links = getNodeLinks(node);
-            return links.resolvedType || checkExpression(node);
-        }
-        function getInitialTypeOfVariableDeclaration(node) {
-            if (node.initializer) {
-                return getTypeOfInitializer(node.initializer);
-            }
-            if (node.parent.parent.kind === 207 /* ForInStatement */) {
-                return stringType;
-            }
-            if (node.parent.parent.kind === 208 /* ForOfStatement */) {
-                return checkRightHandSideOfForOf(node.parent.parent.expression) || unknownType;
-            }
-            return unknownType;
-        }
-        function getInitialType(node) {
-            return node.kind === 218 /* VariableDeclaration */ ?
-                getInitialTypeOfVariableDeclaration(node) :
-                getInitialTypeOfBindingElement(node);
-        }
-        function getFlowTypeOfReference(reference, declaredType, assumeInitialized) {
-            var key;
-            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & 97793 /* Narrowable */)) {
-                return declaredType;
-            }
-            var initialType = assumeInitialized ? declaredType : addNullableKind(declaredType, 32 /* Undefined */);
-            var visitedFlowStart = visitedFlowCount;
-            var result = getTypeAtFlowNode(reference.flowNode);
-            visitedFlowCount = visitedFlowStart;
-            if (reference.parent.kind === 196 /* NonNullExpression */ && getTypeWithFacts(result, 524288 /* NEUndefinedOrNull */) === neverType) {
-                return declaredType;
-            }
-            return result;
-            function getTypeAtFlowNode(flow) {
-                while (true) {
-                    if (flow.flags & 256 /* Shared */) {
-                        // We cache results of flow type resolution for shared nodes that were previously visited in
-                        // the same getFlowTypeOfReference invocation. A node is considered shared when it is the
-                        // antecedent of more than one node.
-                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
-                            if (visitedFlowNodes[i] === flow) {
-                                return visitedFlowTypes[i];
-                            }
-                        }
-                    }
-                    var type = void 0;
-                    if (flow.flags & 16 /* Assignment */) {
-                        type = getTypeAtFlowAssignment(flow);
-                        if (!type) {
-                            flow = flow.antecedent;
-                            continue;
-                        }
-                    }
-                    else if (flow.flags & 96 /* Condition */) {
-                        type = getTypeAtFlowCondition(flow);
-                    }
-                    else if (flow.flags & 12 /* Label */) {
-                        if (flow.antecedents.length === 1) {
-                            flow = flow.antecedents[0];
-                            continue;
-                        }
-                        type = flow.flags & 4 /* BranchLabel */ ?
-                            getTypeAtFlowBranchLabel(flow) :
-                            getTypeAtFlowLoopLabel(flow);
-                    }
-                    else if (flow.flags & 1 /* Unreachable */) {
-                        // Unreachable code errors are reported in the binding phase. Here we
-                        // simply return the declared type to reduce follow-on errors.
-                        type = declaredType;
-                    }
-                    else {
-                        // At the top of the flow we have the initial type.
-                        type = initialType;
-                    }
-                    if (flow.flags & 256 /* Shared */) {
-                        // Record visited node and the associated type in the cache.
-                        visitedFlowNodes[visitedFlowCount] = flow;
-                        visitedFlowTypes[visitedFlowCount] = type;
-                        visitedFlowCount++;
-                    }
-                    return type;
-                }
-            }
-            function getTypeAtFlowAssignment(flow) {
-                var node = flow.node;
-                // Assignments only narrow the computed type if the declared type is a union type. Thus, we
-                // only need to evaluate the assigned type if the declared type is a union type.
-                if ((node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) &&
-                    reference.kind === 69 /* Identifier */ &&
-                    getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(reference)) === getSymbolOfNode(node)) {
-                    return declaredType.flags & 16384 /* Union */ ?
-                        getAssignmentReducedType(declaredType, getInitialType(node)) :
-                        declaredType;
-                }
-                // If the node is not a variable declaration or binding element, it is an identifier
-                // or a dotted name that is the target of an assignment. If we have a match, reduce
-                // the declared type by the assigned type.
-                if (isMatchingReference(reference, node)) {
-                    return declaredType.flags & 16384 /* Union */ ?
-                        getAssignmentReducedType(declaredType, getAssignedType(node)) :
-                        declaredType;
-                }
-                // We didn't have a direct match. However, if the reference is a dotted name, this
-                // may be an assignment to a left hand part of the reference. For example, for a
-                // reference 'x.y.z', we may be at an assignment to 'x.y' or 'x'. In that case,
-                // return the declared type.
-                if (containsMatchingReference(reference, node)) {
-                    return declaredType;
-                }
-                // Assignment doesn't affect reference
-                return undefined;
-            }
-            function getTypeAtFlowCondition(flow) {
-                var type = getTypeAtFlowNode(flow.antecedent);
-                if (type !== neverType) {
-                    // If we have an antecedent type (meaning we're reachable in some way), we first
-                    // attempt to narrow the antecedent type. If that produces the nothing type, then
-                    // we take the type guard as an indication that control could reach here in a
-                    // manner not understood by the control flow analyzer (e.g. a function argument
-                    // has an invalid type, or a nested function has possibly made an assignment to a
-                    // captured variable). We proceed by reverting to the declared type and then
-                    // narrow that.
-                    var assumeTrue = (flow.flags & 32 /* TrueCondition */) !== 0;
-                    type = narrowType(type, flow.expression, assumeTrue);
-                    if (type === neverType) {
-                        type = narrowType(declaredType, flow.expression, assumeTrue);
-                    }
-                }
-                return type;
-            }
-            function getTypeAtFlowBranchLabel(flow) {
-                var antecedentTypes = [];
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    var type = getTypeAtFlowNode(antecedent);
-                    // If the type at a particular antecedent path is the declared type and the
-                    // reference is known to always be assigned (i.e. when declared and initial types
-                    // are the same), there is no reason to process more antecedents since the only
-                    // possible outcome is subtypes that will be removed in the final union type anyway.
-                    if (type === declaredType && declaredType === initialType) {
-                        return type;
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                }
-                return getUnionType(antecedentTypes);
-            }
-            function getTypeAtFlowLoopLabel(flow) {
-                // If we have previously computed the control flow type for the reference at
-                // this flow loop junction, return the cached type.
-                var id = getFlowNodeId(flow);
-                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = {});
-                if (!key) {
-                    key = getFlowCacheKey(reference);
-                }
-                if (cache[key]) {
-                    return cache[key];
-                }
-                // If this flow loop junction and reference are already being processed, return
-                // the union of the types computed for each branch so far. We should never see
-                // an empty array here because the first antecedent of a loop junction is always
-                // the non-looping control flow path that leads to the top.
-                for (var i = flowLoopStart; i < flowLoopCount; i++) {
-                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key) {
-                        return getUnionType(flowLoopTypes[i]);
-                    }
-                }
-                // Add the flow loop junction and reference to the in-process stack and analyze
-                // each antecedent code path.
-                var antecedentTypes = [];
-                flowLoopNodes[flowLoopCount] = flow;
-                flowLoopKeys[flowLoopCount] = key;
-                flowLoopTypes[flowLoopCount] = antecedentTypes;
-                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
-                    var antecedent = _a[_i];
-                    flowLoopCount++;
-                    var type = getTypeAtFlowNode(antecedent);
-                    flowLoopCount--;
-                    // If we see a value appear in the cache it is a sign that control flow  analysis
-                    // was restarted and completed by checkExpressionCached. We can simply pick up
-                    // the resulting type and bail out.
-                    if (cache[key]) {
-                        return cache[key];
-                    }
-                    if (!ts.contains(antecedentTypes, type)) {
-                        antecedentTypes.push(type);
-                    }
-                    // If the type at a particular antecedent path is the declared type there is no
-                    // reason to process more antecedents since the only possible outcome is subtypes
-                    // that will be removed in the final union type anyway.
-                    if (type === declaredType) {
-                        break;
-                    }
-                }
-                return cache[key] = getUnionType(antecedentTypes);
-            }
-            function narrowTypeByTruthiness(type, expr, assumeTrue) {
-                return isMatchingReference(reference, expr) ? getTypeWithFacts(type, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */) : type;
-            }
-            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
-                switch (expr.operatorToken.kind) {
-                    case 56 /* EqualsToken */:
-                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
-                    case 30 /* EqualsEqualsToken */:
-                    case 31 /* ExclamationEqualsToken */:
-                    case 32 /* EqualsEqualsEqualsToken */:
-                    case 33 /* ExclamationEqualsEqualsToken */:
-                        if (isNullOrUndefinedLiteral(expr.right)) {
-                            return narrowTypeByNullCheck(type, expr, assumeTrue);
-                        }
-                        if (expr.left.kind === 182 /* TypeOfExpression */ && expr.right.kind === 9 /* StringLiteral */) {
-                            return narrowTypeByTypeof(type, expr, assumeTrue);
-                        }
-                        break;
-                    case 91 /* InstanceOfKeyword */:
-                        return narrowTypeByInstanceof(type, expr, assumeTrue);
-                    case 24 /* CommaToken */:
-                        return narrowType(type, expr.right, assumeTrue);
-                }
-                return type;
-            }
-            function narrowTypeByNullCheck(type, expr, assumeTrue) {
-                // We have '==', '!=', '===', or '!==' operator with 'null' or 'undefined' on the right
-                var operator = expr.operatorToken.kind;
-                if (operator === 31 /* ExclamationEqualsToken */ || operator === 33 /* ExclamationEqualsEqualsToken */) {
-                    assumeTrue = !assumeTrue;
-                }
-                if (!strictNullChecks || !isMatchingReference(reference, expr.left)) {
-                    return type;
-                }
-                var doubleEquals = operator === 30 /* EqualsEqualsToken */ || operator === 31 /* ExclamationEqualsToken */;
-                var facts = doubleEquals ?
-                    assumeTrue ? 65536 /* EQUndefinedOrNull */ : 524288 /* NEUndefinedOrNull */ :
-                    expr.right.kind === 93 /* NullKeyword */ ?
-                        assumeTrue ? 32768 /* EQNull */ : 262144 /* NENull */ :
-                        assumeTrue ? 16384 /* EQUndefined */ : 131072 /* NEUndefined */;
-                return getTypeWithFacts(type, facts);
-            }
-            function narrowTypeByTypeof(type, expr, assumeTrue) {
-                // We have '==', '!=', '====', or !==' operator with 'typeof xxx' on the left
-                // and string literal on the right
-                var left = expr.left;
-                var right = expr.right;
-                if (!isMatchingReference(reference, left.expression)) {
-                    // For a reference of the form 'x.y', a 'typeof x === ...' type guard resets the
-                    // narrowed type of 'y' to its declared type.
-                    if (containsMatchingReference(reference, left.expression)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                if (expr.operatorToken.kind === 31 /* ExclamationEqualsToken */ ||
-                    expr.operatorToken.kind === 33 /* ExclamationEqualsEqualsToken */) {
-                    assumeTrue = !assumeTrue;
-                }
-                if (assumeTrue && !(type.flags & 16384 /* Union */)) {
-                    // We narrow a non-union type to an exact primitive type if the non-union type
-                    // is a supertype of that primtive type. For example, type 'any' can be narrowed
-                    // to one of the primitive types.
-                    var targetType = ts.getProperty(typeofTypesByName, right.text);
-                    if (targetType && isTypeSubtypeOf(targetType, type)) {
-                        return targetType;
-                    }
-                }
-                var facts = assumeTrue ?
-                    ts.getProperty(typeofEQFacts, right.text) || 64 /* TypeofEQHostObject */ :
-                    ts.getProperty(typeofNEFacts, right.text) || 8192 /* TypeofNEHostObject */;
-                return getTypeWithFacts(type, facts);
-            }
-            function narrowTypeByInstanceof(type, expr, assumeTrue) {
-                if (!isMatchingReference(reference, expr.left)) {
-                    // For a reference of the form 'x.y', an 'x instanceof T' type guard resets the
-                    // narrowed type of 'y' to its declared type.
-                    if (containsMatchingReference(reference, expr.left)) {
-                        return declaredType;
-                    }
-                    return type;
-                }
-                // We never narrow type any in an instanceof guard
-                if (isTypeAny(type)) {
-                    return type;
-                }
-                // Check that right operand is a function type with a prototype property
-                var rightType = checkExpression(expr.right);
-                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
-                    return type;
-                }
-                var targetType;
-                var prototypeProperty = getPropertyOfType(rightType, "prototype");
-                if (prototypeProperty) {
-                    // Target type is type of the prototype property
-                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
-                    if (!isTypeAny(prototypePropertyType)) {
-                        targetType = prototypePropertyType;
-                    }
-                }
-                if (!targetType) {
-                    // Target type is type of construct signature
-                    var constructSignatures = void 0;
-                    if (rightType.flags & 2048 /* Interface */) {
-                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
-                    }
-                    else if (rightType.flags & 65536 /* Anonymous */) {
-                        constructSignatures = getSignaturesOfType(rightType, 1 /* Construct */);
-                    }
-                    if (constructSignatures && constructSignatures.length) {
-                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
-                    }
-                }
-                if (targetType) {
-                    return getNarrowedType(type, targetType, assumeTrue);
-                }
-                return type;
-            }
-            function getNarrowedType(type, candidate, assumeTrue) {
-                if (!assumeTrue) {
-                    return type.flags & 16384 /* Union */ ?
-                        getUnionType(ts.filter(type.types, function (t) { return !isTypeSubtypeOf(t, candidate); })) :
-                        type;
-                }
-                // If the current type is a union type, remove all constituents that aren't assignable to
-                // the candidate type. If one or more constituents remain, return a union of those.
-                if (type.flags & 16384 /* Union */) {
-                    var assignableConstituents = ts.filter(type.types, function (t) { return isTypeAssignableTo(t, candidate); });
-                    if (assignableConstituents.length) {
-                        return getUnionType(assignableConstituents);
-                    }
-                }
-                // If the candidate type is assignable to the target type, narrow to the candidate type.
-                // Otherwise, if the current type is assignable to the candidate, keep the current type.
-                // Otherwise, the types are completely unrelated, so narrow to the empty type.
-                var targetType = type.flags & 512 /* TypeParameter */ ? getApparentType(type) : type;
-                return isTypeAssignableTo(candidate, targetType) ? candidate :
-                    isTypeAssignableTo(type, candidate) ? type :
-                        neverType;
-            }
-            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
-                if (type.flags & 1 /* Any */ || !hasMatchingArgument(callExpression, reference)) {
-                    return type;
-                }
-                var signature = getResolvedSignature(callExpression);
-                var predicate = signature.typePredicate;
-                if (!predicate) {
-                    return type;
-                }
-                if (ts.isIdentifierTypePredicate(predicate)) {
-                    var predicateArgument = callExpression.arguments[predicate.parameterIndex];
-                    if (predicateArgument) {
-                        if (isMatchingReference(reference, predicateArgument)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, predicateArgument)) {
-                            return declaredType;
-                        }
-                    }
-                }
-                else {
-                    var invokedExpression = skipParenthesizedNodes(callExpression.expression);
-                    if (invokedExpression.kind === 173 /* ElementAccessExpression */ || invokedExpression.kind === 172 /* PropertyAccessExpression */) {
-                        var accessExpression = invokedExpression;
-                        var possibleReference = skipParenthesizedNodes(accessExpression.expression);
-                        if (isMatchingReference(reference, possibleReference)) {
-                            return getNarrowedType(type, predicate.type, assumeTrue);
-                        }
-                        if (containsMatchingReference(reference, possibleReference)) {
-                            return declaredType;
-                        }
-                    }
-                }
-                return type;
-            }
-            // Narrow the given type based on the given expression having the assumed boolean value. The returned type
-            // will be a subtype or the same type as the argument.
-            function narrowType(type, expr, assumeTrue) {
-                switch (expr.kind) {
-                    case 69 /* Identifier */:
-                    case 97 /* ThisKeyword */:
-                    case 172 /* PropertyAccessExpression */:
-                        return narrowTypeByTruthiness(type, expr, assumeTrue);
-                    case 174 /* CallExpression */:
-                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
-                    case 178 /* ParenthesizedExpression */:
-                        return narrowType(type, expr.expression, assumeTrue);
-                    case 187 /* BinaryExpression */:
-                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
-                    case 185 /* PrefixUnaryExpression */:
-                        if (expr.operator === 49 /* ExclamationToken */) {
-                            return narrowType(type, expr.operand, !assumeTrue);
-                        }
-                        break;
-                }
-                return type;
-            }
-        }
-        function getTypeOfSymbolAtLocation(symbol, location) {
-            // If we have an identifier or a property access at the given location, if the location is
-            // an dotted name expression, and if the location is not an assignment target, obtain the type
-            // of the expression (which will reflect control flow analysis). If the expression indeed
-            // resolved to the given symbol, return the narrowed type.
-            if (location.kind === 69 /* Identifier */) {
-                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
-                    location = location.parent;
-                }
-                if (ts.isExpression(location) && !ts.isAssignmentTarget(location)) {
-                    var type = checkExpression(location);
-                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
-                        return type;
-                    }
-                }
-            }
-            // The location isn't a reference to the given symbol, meaning we're being asked
-            // a hypothetical question of what type the symbol would have if there was a reference
-            // to it at the given location. Since we have no control flow information for the
-            // hypotherical reference (control flow information is created and attached by the
-            // binder), we simply return the declared type of the symbol.
-            return getTypeOfSymbol(symbol);
-        }
-        function skipParenthesizedNodes(expression) {
-            while (expression.kind === 178 /* ParenthesizedExpression */) {
-                expression = expression.expression;
-            }
-            return expression;
-        }
-        function checkIdentifier(node) {
-            var symbol = getResolvedSymbol(node);
-            // As noted in ECMAScript 6 language spec, arrow functions never have an arguments objects.
-            // Although in down-level emit of arrow function, we emit it using function expression which means that
-            // arguments objects will be bound to the inner object; emitting arrow function natively in ES6, arguments objects
-            // will be bound to non-arrow function that contain this arrow function. This results in inconsistent behavior.
-            // To avoid that we will give an error to users if they use arguments objects in arrow function so that they
-            // can explicitly bound arguments objects
-            if (symbol === argumentsSymbol) {
-                var container = ts.getContainingFunction(node);
-                if (container.kind === 180 /* ArrowFunction */) {
-                    if (languageVersion < 2 /* ES6 */) {
-                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
-                    }
-                }
-                if (node.flags & 33554432 /* AwaitContext */) {
-                    getNodeLinks(container).flags |= 8192 /* CaptureArguments */;
-                }
-            }
-            if (symbol.flags & 8388608 /* Alias */ && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
-                markAliasSymbolAsReferenced(symbol);
-            }
-            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
-            // Due to the emit for class decorators, any reference to the class from inside of the class body
-            // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
-            // behavior of class names in ES6.
-            if (languageVersion === 2 /* ES6 */
-                && localOrExportSymbol.flags & 32 /* Class */
-                && localOrExportSymbol.valueDeclaration.kind === 221 /* ClassDeclaration */
-                && ts.nodeIsDecorated(localOrExportSymbol.valueDeclaration)) {
-                var container = ts.getContainingClass(node);
-                while (container !== undefined) {
-                    if (container === localOrExportSymbol.valueDeclaration && container.name !== node) {
-                        getNodeLinks(container).flags |= 524288 /* ClassWithBodyScopedClassBinding */;
-                        getNodeLinks(node).flags |= 1048576 /* BodyScopedClassBinding */;
-                        break;
-                    }
-                    container = ts.getContainingClass(container);
-                }
-            }
-            checkCollisionWithCapturedSuperVariable(node, node);
-            checkCollisionWithCapturedThisVariable(node, node);
-            checkNestedBlockScopedBinding(node, symbol);
-            var type = getTypeOfSymbol(localOrExportSymbol);
-            if (!(localOrExportSymbol.flags & 3 /* Variable */) || ts.isAssignmentTarget(node)) {
-                return type;
-            }
-            var declaration = localOrExportSymbol.valueDeclaration;
-            var assumeInitialized = !strictNullChecks || (type.flags & 1 /* Any */) !== 0 || !declaration ||
-                ts.getRootDeclaration(declaration).kind === 142 /* Parameter */ || ts.isInAmbientContext(declaration) ||
-                ts.getContainingFunctionOrModule(declaration) !== ts.getContainingFunctionOrModule(node);
-            var flowType = getFlowTypeOfReference(node, type, assumeInitialized);
-            if (!assumeInitialized && !(getNullableKind(type) & 32 /* Undefined */) && getNullableKind(flowType) & 32 /* Undefined */) {
-                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
-                // Return the declared type to reduce follow-on errors
-                return type;
-            }
-            return flowType;
-        }
-        function isInsideFunction(node, threshold) {
-            var current = node;
-            while (current && current !== threshold) {
-                if (ts.isFunctionLike(current)) {
-                    return true;
-                }
-                current = current.parent;
-            }
-            return false;
-        }
-        function checkNestedBlockScopedBinding(node, symbol) {
-            if (languageVersion >= 2 /* ES6 */ ||
-                (symbol.flags & (2 /* BlockScopedVariable */ | 32 /* Class */)) === 0 ||
-                symbol.valueDeclaration.parent.kind === 252 /* CatchClause */) {
-                return;
-            }
-            // 1. walk from the use site up to the declaration and check
-            // if there is anything function like between declaration and use-site (is binding/class is captured in function).
-            // 2. walk from the declaration up to the boundary of lexical environment and check
-            // if there is an iteration statement in between declaration and boundary (is binding/class declared inside iteration statement)
-            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-            var usedInFunction = isInsideFunction(node.parent, container);
-            var current = container;
-            var containedInIterationStatement = false;
-            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
-                if (ts.isIterationStatement(current, /*lookInLabeledStatements*/ false)) {
-                    containedInIterationStatement = true;
-                    break;
-                }
-                current = current.parent;
-            }
-            if (containedInIterationStatement) {
-                if (usedInFunction) {
-                    // mark iteration statement as containing block-scoped binding captured in some function
-                    getNodeLinks(current).flags |= 65536 /* LoopWithCapturedBlockScopedBinding */;
-                }
-                // mark variables that are declared in loop initializer and reassigned inside the body of ForStatement.
-                // if body of ForStatement will be converted to function then we'll need a extra machinery to propagate reassigned values back.
-                if (container.kind === 206 /* ForStatement */ &&
-                    ts.getAncestor(symbol.valueDeclaration, 219 /* VariableDeclarationList */).parent === container &&
-                    isAssignedInBodyOfForStatement(node, container)) {
-                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152 /* NeedsLoopOutParameter */;
-                }
-                // set 'declared inside loop' bit on the block-scoped binding
-                getNodeLinks(symbol.valueDeclaration).flags |= 262144 /* BlockScopedBindingInLoop */;
-            }
-            if (usedInFunction) {
-                getNodeLinks(symbol.valueDeclaration).flags |= 131072 /* CapturedBlockScopedBinding */;
-            }
-        }
-        function isAssignedInBodyOfForStatement(node, container) {
-            var current = node;
-            // skip parenthesized nodes
-            while (current.parent.kind === 178 /* ParenthesizedExpression */) {
-                current = current.parent;
-            }
-            // check if node is used as LHS in some assignment expression
-            var isAssigned = false;
-            if (ts.isAssignmentTarget(current)) {
-                isAssigned = true;
-            }
-            else if ((current.parent.kind === 185 /* PrefixUnaryExpression */ || current.parent.kind === 186 /* PostfixUnaryExpression */)) {
-                var expr = current.parent;
-                isAssigned = expr.operator === 41 /* PlusPlusToken */ || expr.operator === 42 /* MinusMinusToken */;
-            }
-            if (!isAssigned) {
-                return false;
-            }
-            // at this point we know that node is the target of assignment
-            // now check that modification happens inside the statement part of the ForStatement
-            while (current !== container) {
-                if (current === container.statement) {
-                    return true;
-                }
-                else {
-                    current = current.parent;
-                }
-            }
-            return false;
-        }
-        function captureLexicalThis(node, container) {
-            getNodeLinks(node).flags |= 2 /* LexicalThis */;
-            if (container.kind === 145 /* PropertyDeclaration */ || container.kind === 148 /* Constructor */) {
-                var classNode = container.parent;
-                getNodeLinks(classNode).flags |= 4 /* CaptureThis */;
-            }
-            else {
-                getNodeLinks(container).flags |= 4 /* CaptureThis */;
-            }
-        }
-        function findFirstSuperCall(n) {
-            if (ts.isSuperCallExpression(n)) {
-                return n;
-            }
-            else if (ts.isFunctionLike(n)) {
-                return undefined;
-            }
-            return ts.forEachChild(n, findFirstSuperCall);
-        }
-        /**
-         * Return a cached result if super-statement is already found.
-         * Otherwise, find a super statement in a given constructor function and cache the result in the node-links of the constructor
-         *
-         * @param constructor constructor-function to look for super statement
-         */
-        function getSuperCallInConstructor(constructor) {
-            var links = getNodeLinks(constructor);
-            // Only trying to find super-call if we haven't yet tried to find one.  Once we try, we will record the result
-            if (links.hasSuperCall === undefined) {
-                links.superCall = findFirstSuperCall(constructor.body);
-                links.hasSuperCall = links.superCall ? true : false;
-            }
-            return links.superCall;
-        }
-        /**
-         * Check if the given class-declaration extends null then return true.
-         * Otherwise, return false
-         * @param classDecl a class declaration to check if it extends null
-         */
-        function classDeclarationExtendsNull(classDecl) {
-            var classSymbol = getSymbolOfNode(classDecl);
-            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
-            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
-            return baseConstructorType === nullType;
-        }
-        function checkThisExpression(node) {
-            // Stop at the first arrow function so that we can
-            // tell whether 'this' needs to be captured.
-            var container = ts.getThisContainer(node, /* includeArrowFunctions */ true);
-            var needToCaptureLexicalThis = false;
-            if (container.kind === 148 /* Constructor */) {
-                var containingClassDecl = container.parent;
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
-                // If a containing class does not have extends clause or the class extends null
-                // skip checking whether super statement is called before "this" accessing.
-                if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
-                    var superCall = getSuperCallInConstructor(container);
-                    // We should give an error in the following cases:
-                    //      - No super-call
-                    //      - "this" is accessing before super-call.
-                    //          i.e super(this)
-                    //              this.x; super();
-                    // We want to make sure that super-call is done before accessing "this" so that
-                    // "this" is not accessed as a parameter of the super-call.
-                    if (!superCall || superCall.end > node.pos) {
-                        // In ES6, super inside constructor of class-declaration has to precede "this" accessing
-                        error(node, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
-                    }
-                }
-            }
-            // Now skip arrow functions to get the "real" owner of 'this'.
-            if (container.kind === 180 /* ArrowFunction */) {
-                container = ts.getThisContainer(container, /* includeArrowFunctions */ false);
-                // When targeting es6, arrow function lexically bind "this" so we do not need to do the work of binding "this" in emitted code
-                needToCaptureLexicalThis = (languageVersion < 2 /* ES6 */);
-            }
-            switch (container.kind) {
-                case 225 /* ModuleDeclaration */:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
-                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
-                    break;
-                case 224 /* EnumDeclaration */:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
-                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
-                    break;
-                case 148 /* Constructor */:
-                    if (isInConstructorArgumentInitializer(node, container)) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
-                    }
-                    break;
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    if (container.flags & 32 /* Static */) {
-                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
-                    }
-                    break;
-                case 140 /* ComputedPropertyName */:
-                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
-                    break;
-            }
-            if (needToCaptureLexicalThis) {
-                captureLexicalThis(node, container);
-            }
-            if (ts.isFunctionLike(container)) {
-                // If this is a function in a JS file, it might be a class method. Check if it's the RHS
-                // of a x.prototype.y = function [name]() { .... }
-                if (container.kind === 179 /* FunctionExpression */ &&
-                    ts.isInJavaScriptFile(container.parent) &&
-                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3 /* PrototypeProperty */) {
-                    // Get the 'x' of 'x.prototype.y = f' (here, 'f' is 'container')
-                    var className = container.parent // x.prototype.y = f
-                        .left // x.prototype.y
-                        .expression // x.prototype
-                        .expression; // x
-                    var classSymbol = checkExpression(className).symbol;
-                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16 /* Function */)) {
-                        return getInferredClassType(classSymbol);
-                    }
-                }
-                var type = getContextuallyTypedThisType(container);
-                if (type) {
-                    return type;
-                }
-                var signature = getSignatureFromDeclaration(container);
-                if (signature.thisType) {
-                    return signature.thisType;
-                }
-            }
-            if (ts.isClassLike(container.parent)) {
-                var symbol = getSymbolOfNode(container.parent);
-                var type = container.flags & 32 /* Static */ ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
-                return getFlowTypeOfReference(node, type, /*assumeInitialized*/ true);
-            }
-            if (ts.isInJavaScriptFile(node)) {
-                var type = getTypeForThisExpressionFromJSDoc(container);
-                if (type && type !== unknownType) {
-                    return type;
-                }
-            }
-            if (compilerOptions.noImplicitThis) {
-                // With noImplicitThis, functions may not reference 'this' if it has type 'any'
-                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
-            }
-            return anyType;
-        }
-        function getTypeForThisExpressionFromJSDoc(node) {
-            var typeTag = ts.getJSDocTypeTag(node);
-            if (typeTag && typeTag.typeExpression && typeTag.typeExpression.type && typeTag.typeExpression.type.kind === 269 /* JSDocFunctionType */) {
-                var jsDocFunctionType = typeTag.typeExpression.type;
-                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 272 /* JSDocThisType */) {
-                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
-                }
-            }
-        }
-        function isInConstructorArgumentInitializer(node, constructorDecl) {
-            for (var n = node; n && n !== constructorDecl; n = n.parent) {
-                if (n.kind === 142 /* Parameter */) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function checkSuperExpression(node) {
-            var isCallExpression = node.parent.kind === 174 /* CallExpression */ && node.parent.expression === node;
-            var container = ts.getSuperContainer(node, /*stopOnFunctions*/ true);
-            var needToCaptureLexicalThis = false;
-            if (!isCallExpression) {
-                // adjust the container reference in case if super is used inside arrow functions with arbitrary deep nesting
-                while (container && container.kind === 180 /* ArrowFunction */) {
-                    container = ts.getSuperContainer(container, /*stopOnFunctions*/ true);
-                    needToCaptureLexicalThis = languageVersion < 2 /* ES6 */;
-                }
-            }
-            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
-            var nodeCheckFlag = 0;
-            if (!canUseSuperExpression) {
-                // issue more specific error if super is used in computed property name
-                // class A { foo() { return "1" }}
-                // class B {
-                //     [super.foo()]() {}
-                // }
-                var current = node;
-                while (current && current !== container && current.kind !== 140 /* ComputedPropertyName */) {
-                    current = current.parent;
-                }
-                if (current && current.kind === 140 /* ComputedPropertyName */) {
-                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
-                }
-                else if (isCallExpression) {
-                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
-                }
-                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 171 /* ObjectLiteralExpression */)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
-                }
-                else {
-                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
-                }
-                return unknownType;
-            }
-            if ((container.flags & 32 /* Static */) || isCallExpression) {
-                nodeCheckFlag = 512 /* SuperStatic */;
-            }
-            else {
-                nodeCheckFlag = 256 /* SuperInstance */;
-            }
-            getNodeLinks(node).flags |= nodeCheckFlag;
-            // Due to how we emit async functions, we need to specialize the emit for an async method that contains a `super` reference.
-            // This is due to the fact that we emit the body of an async function inside of a generator function. As generator
-            // functions cannot reference `super`, we emit a helper inside of the method body, but outside of the generator. This helper
-            // uses an arrow function, which is permitted to reference `super`.
-            //
-            // There are two primary ways we can access `super` from within an async method. The first is getting the value of a property
-            // or indexed access on super, either as part of a right-hand-side expression or call expression. The second is when setting the value
-            // of a property or indexed access, either as part of an assignment expression or destructuring assignment.
-            //
-            // The simplest case is reading a value, in which case we will emit something like the following:
-            //
-            //  // ts
-            //  ...
-            //  async asyncMethod() {
-            //    let x = await super.asyncMethod();
-            //    return x;
-            //  }
-            //  ...
-            //
-            //  // js
-            //  ...
-            //  asyncMethod() {
-            //      const _super = name => super[name];
-            //      return __awaiter(this, arguments, Promise, function *() {
-            //          let x = yield _super("asyncMethod").call(this);
-            //          return x;
-            //      });
-            //  }
-            //  ...
-            //
-            // The more complex case is when we wish to assign a value, especially as part of a destructuring assignment. As both cases
-            // are legal in ES6, but also likely less frequent, we emit the same more complex helper for both scenarios:
-            //
-            //  // ts
-            //  ...
-            //  async asyncMethod(ar: Promise<any[]>) {
-            //      [super.a, super.b] = await ar;
-            //  }
-            //  ...
-            //
-            //  // js
-            //  ...
-            //  asyncMethod(ar) {
-            //      const _super = (function (geti, seti) {
-            //          const cache = Object.create(null);
-            //          return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
-            //      })(name => super[name], (name, value) => super[name] = value);
-            //      return __awaiter(this, arguments, Promise, function *() {
-            //          [_super("a").value, _super("b").value] = yield ar;
-            //      });
-            //  }
-            //  ...
-            //
-            // This helper creates an object with a "value" property that wraps the `super` property or indexed access for both get and set.
-            // This is required for destructuring assignments, as a call expression cannot be used as the target of a destructuring assignment
-            // while a property access can.
-            if (container.kind === 147 /* MethodDeclaration */ && container.flags & 256 /* Async */) {
-                if (ts.isSuperPropertyOrElementAccess(node.parent) && ts.isAssignmentTarget(node.parent)) {
-                    getNodeLinks(container).flags |= 4096 /* AsyncMethodWithSuperBinding */;
-                }
-                else {
-                    getNodeLinks(container).flags |= 2048 /* AsyncMethodWithSuper */;
-                }
-            }
-            if (needToCaptureLexicalThis) {
-                // call expressions are allowed only in constructors so they should always capture correct 'this'
-                // super property access expressions can also appear in arrow functions -
-                // in this case they should also use correct lexical this
-                captureLexicalThis(node.parent, container);
-            }
-            if (container.parent.kind === 171 /* ObjectLiteralExpression */) {
-                if (languageVersion < 2 /* ES6 */) {
-                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
-                    return unknownType;
-                }
-                else {
-                    // for object literal assume that type of 'super' is 'any'
-                    return anyType;
-                }
-            }
-            // at this point the only legal case for parent is ClassLikeDeclaration
-            var classLikeDeclaration = container.parent;
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
-            var baseClassType = classType && getBaseTypes(classType)[0];
-            if (!baseClassType) {
-                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
-                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
-                }
-                return unknownType;
-            }
-            if (container.kind === 148 /* Constructor */ && isInConstructorArgumentInitializer(node, container)) {
-                // issue custom error message for super property access in constructor arguments (to be aligned with old compiler)
-                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
-                return unknownType;
-            }
-            return nodeCheckFlag === 512 /* SuperStatic */
-                ? getBaseConstructorTypeOfClass(classType)
-                : getTypeWithThisArgument(baseClassType, classType.thisType);
-            function isLegalUsageOfSuperExpression(container) {
-                if (!container) {
-                    return false;
-                }
-                if (isCallExpression) {
-                    // TS 1.0 SPEC (April 2014): 4.8.1
-                    // Super calls are only permitted in constructors of derived classes
-                    return container.kind === 148 /* Constructor */;
-                }
-                else {
-                    // TS 1.0 SPEC (April 2014)
-                    // 'super' property access is allowed
-                    // - In a constructor, instance member function, instance member accessor, or instance member variable initializer where this references a derived class instance
-                    // - In a static member function or static member accessor
-                    // topmost container must be something that is directly nested in the class declaration\object literal expression
-                    if (ts.isClassLike(container.parent) || container.parent.kind === 171 /* ObjectLiteralExpression */) {
-                        if (container.flags & 32 /* Static */) {
-                            return container.kind === 147 /* MethodDeclaration */ ||
-                                container.kind === 146 /* MethodSignature */ ||
-                                container.kind === 149 /* GetAccessor */ ||
-                                container.kind === 150 /* SetAccessor */;
-                        }
-                        else {
-                            return container.kind === 147 /* MethodDeclaration */ ||
-                                container.kind === 146 /* MethodSignature */ ||
-                                container.kind === 149 /* GetAccessor */ ||
-                                container.kind === 150 /* SetAccessor */ ||
-                                container.kind === 145 /* PropertyDeclaration */ ||
-                                container.kind === 144 /* PropertySignature */ ||
-                                container.kind === 148 /* Constructor */;
-                        }
-                    }
-                }
-                return false;
-            }
-        }
-        function getContextuallyTypedThisType(func) {
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func) && func.kind !== 180 /* ArrowFunction */) {
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    return contextualSignature.thisType;
-                }
-            }
-            return undefined;
-        }
-        // Return contextual type of parameter or undefined if no contextual type is available
-        function getContextuallyTypedParameterType(parameter) {
-            var func = parameter.parent;
-            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
-                var iife = getImmediatelyInvokedFunctionExpression(func);
-                if (iife) {
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
-                        if (parameter.dotDotDotToken) {
-                            var restTypes = [];
-                            for (var i = indexOfParameter; i < iife.arguments.length; i++) {
-                                restTypes.push(getTypeOfExpression(iife.arguments[i]));
-                            }
-                            return createArrayType(getUnionType(restTypes));
-                        }
-                        var links = getNodeLinks(iife);
-                        var cached = links.resolvedSignature;
-                        links.resolvedSignature = anySignature;
-                        var type = checkExpression(iife.arguments[indexOfParameter]);
-                        links.resolvedSignature = cached;
-                        return type;
-                    }
-                }
-                var contextualSignature = getContextualSignature(func);
-                if (contextualSignature) {
-                    var funcHasRestParameters = ts.hasRestParameter(func);
-                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
-                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
-                    if (indexOfParameter < len) {
-                        return getTypeAtPosition(contextualSignature, indexOfParameter);
-                    }
-                    // If last parameter is contextually rest parameter get its type
-                    if (funcHasRestParameters &&
-                        indexOfParameter === (func.parameters.length - 1) &&
-                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
-                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
-                    }
-                }
-            }
-            return undefined;
-        }
-        function getImmediatelyInvokedFunctionExpression(func) {
-            if (isFunctionExpressionOrArrowFunction(func)) {
-                var prev = func;
-                var parent_8 = func.parent;
-                while (parent_8.kind === 178 /* ParenthesizedExpression */) {
-                    prev = parent_8;
-                    parent_8 = parent_8.parent;
-                }
-                if (parent_8.kind === 174 /* CallExpression */ && parent_8.expression === prev) {
-                    return parent_8;
-                }
-            }
-        }
-        // In a variable, parameter or property declaration with a type annotation,
-        //   the contextual type of an initializer expression is the type of the variable, parameter or property.
-        // Otherwise, in a parameter declaration of a contextually typed function expression,
-        //   the contextual type of an initializer expression is the contextual type of the parameter.
-        // Otherwise, in a variable or parameter declaration with a binding pattern name,
-        //   the contextual type of an initializer expression is the type implied by the binding pattern.
-        // Otherwise, in a binding pattern inside a variable or parameter declaration,
-        //   the contextual type of an initializer expression is the type annotation of the containing declaration, if present.
-        function getContextualTypeForInitializerExpression(node) {
-            var declaration = node.parent;
-            if (node === declaration.initializer) {
-                if (declaration.type) {
-                    return getTypeFromTypeNode(declaration.type);
-                }
-                if (declaration.kind === 142 /* Parameter */) {
-                    var type = getContextuallyTypedParameterType(declaration);
-                    if (type) {
-                        return type;
-                    }
-                }
-                if (ts.isBindingPattern(declaration.name)) {
-                    return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ true);
-                }
-                if (ts.isBindingPattern(declaration.parent)) {
-                    var parentDeclaration = declaration.parent.parent;
-                    var name_11 = declaration.propertyName || declaration.name;
-                    if (ts.isVariableLike(parentDeclaration) &&
-                        parentDeclaration.type &&
-                        !ts.isBindingPattern(name_11)) {
-                        var text = getTextOfPropertyName(name_11);
-                        if (text) {
-                            return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text);
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function getContextualTypeForReturnExpression(node) {
-            var func = ts.getContainingFunction(node);
-            if (func && !func.asteriskToken) {
-                return getContextualReturnType(func);
-            }
-            return undefined;
-        }
-        function getContextualTypeForYieldOperand(node) {
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var contextualReturnType = getContextualReturnType(func);
-                if (contextualReturnType) {
-                    return node.asteriskToken
-                        ? contextualReturnType
-                        : getElementTypeOfIterableIterator(contextualReturnType);
-                }
-            }
-            return undefined;
-        }
-        function isInParameterInitializerBeforeContainingFunction(node) {
-            while (node.parent && !ts.isFunctionLike(node.parent)) {
-                if (node.parent.kind === 142 /* Parameter */ && node.parent.initializer === node) {
-                    return true;
-                }
-                node = node.parent;
-            }
-            return false;
-        }
-        function getContextualReturnType(functionDecl) {
-            // If the containing function has a return type annotation, is a constructor, or is a get accessor whose
-            // corresponding set accessor has a type annotation, return statements in the function are contextually typed
-            if (functionDecl.type ||
-                functionDecl.kind === 148 /* Constructor */ ||
-                functionDecl.kind === 149 /* GetAccessor */ && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(functionDecl.symbol, 150 /* SetAccessor */))) {
-                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
-            }
-            // Otherwise, if the containing function is contextually typed by a function type with exactly one call signature
-            // and that call signature is non-generic, return statements are contextually typed by the return type of the signature
-            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
-            if (signature) {
-                return getReturnTypeOfSignature(signature);
-            }
-            return undefined;
-        }
-        // In a typed function call, an argument or substitution expression is contextually typed by the type of the corresponding parameter.
-        function getContextualTypeForArgument(callTarget, arg) {
-            var args = getEffectiveCallArguments(callTarget);
-            var argIndex = ts.indexOf(args, arg);
-            if (argIndex >= 0) {
-                var signature = getResolvedOrAnySignature(callTarget);
-                return getTypeAtPosition(signature, argIndex);
-            }
-            return undefined;
-        }
-        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
-            if (template.parent.kind === 176 /* TaggedTemplateExpression */) {
-                return getContextualTypeForArgument(template.parent, substitutionExpression);
-            }
-            return undefined;
-        }
-        function getContextualTypeForBinaryOperand(node) {
-            var binaryExpression = node.parent;
-            var operator = binaryExpression.operatorToken.kind;
-            if (operator >= 56 /* FirstAssignment */ && operator <= 68 /* LastAssignment */) {
-                // In an assignment expression, the right operand is contextually typed by the type of the left operand.
-                if (node === binaryExpression.right) {
-                    return checkExpression(binaryExpression.left);
-                }
-            }
-            else if (operator === 52 /* BarBarToken */) {
-                // When an || expression has a contextual type, the operands are contextually typed by that type. When an ||
-                // expression has no contextual type, the right operand is contextually typed by the type of the left operand.
-                var type = getContextualType(binaryExpression);
-                if (!type && node === binaryExpression.right) {
-                    type = checkExpression(binaryExpression.left);
-                }
-                return type;
-            }
-            else if (operator === 51 /* AmpersandAmpersandToken */ || operator === 24 /* CommaToken */) {
-                if (node === binaryExpression.right) {
-                    return getContextualType(binaryExpression);
-                }
-            }
-            return undefined;
-        }
-        // Apply a mapping function to a contextual type and return the resulting type. If the contextual type
-        // is a union type, the mapping function is applied to each constituent type and a union of the resulting
-        // types is returned.
-        function applyToContextualType(type, mapper) {
-            if (!(type.flags & 16384 /* Union */)) {
-                return mapper(type);
-            }
-            var types = type.types;
-            var mappedType;
-            var mappedTypes;
-            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
-                var current = types_8[_i];
-                var t = mapper(current);
-                if (t) {
-                    if (!mappedType) {
-                        mappedType = t;
-                    }
-                    else if (!mappedTypes) {
-                        mappedTypes = [mappedType, t];
-                    }
-                    else {
-                        mappedTypes.push(t);
-                    }
-                }
-            }
-            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
-        }
-        function getTypeOfPropertyOfContextualType(type, name) {
-            return applyToContextualType(type, function (t) {
-                var prop = t.flags & 130048 /* StructuredType */ ? getPropertyOfType(t, name) : undefined;
-                return prop ? getTypeOfSymbol(prop) : undefined;
-            });
-        }
-        function getIndexTypeOfContextualType(type, kind) {
-            return applyToContextualType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
-        }
-        function contextualTypeIsStringLiteralType(type) {
-            return !!(type.flags & 16384 /* Union */ ? ts.forEach(type.types, isStringLiteralType) : isStringLiteralType(type));
-        }
-        // Return true if the given contextual type is a tuple-like type
-        function contextualTypeIsTupleLikeType(type) {
-            return !!(type.flags & 16384 /* Union */ ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
-        }
-        // In an object literal contextually typed by a type T, the contextual type of a property assignment is the type of
-        // the matching property in T, if one exists. Otherwise, it is the type of the numeric index signature in T, if one
-        // exists. Otherwise, it is the type of the string index signature in T, if one exists.
-        function getContextualTypeForObjectLiteralMethod(node) {
-            ts.Debug.assert(ts.isObjectLiteralMethod(node));
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return undefined;
-            }
-            return getContextualTypeForObjectLiteralElement(node);
-        }
-        function getContextualTypeForObjectLiteralElement(element) {
-            var objectLiteral = element.parent;
-            var type = getApparentTypeOfContextualType(objectLiteral);
-            if (type) {
-                if (!ts.hasDynamicName(element)) {
-                    // For a (non-symbol) computed property, there is no reason to look up the name
-                    // in the type. It will just be "__computed", which does not appear in any
-                    // SymbolTable.
-                    var symbolName = getSymbolOfNode(element).name;
-                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
-                    if (propertyType) {
-                        return propertyType;
-                    }
-                }
-                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1 /* Number */) ||
-                    getIndexTypeOfContextualType(type, 0 /* String */);
-            }
-            return undefined;
-        }
-        // In an array literal contextually typed by a type T, the contextual type of an element expression at index N is
-        // the type of the property with the numeric name N in T, if one exists. Otherwise, if T has a numeric index signature,
-        // it is the type of the numeric index signature in T. Otherwise, in ES6 and higher, the contextual type is the iterated
-        // type of T.
-        function getContextualTypeForElementExpression(node) {
-            var arrayLiteral = node.parent;
-            var type = getApparentTypeOfContextualType(arrayLiteral);
-            if (type) {
-                var index = ts.indexOf(arrayLiteral.elements, node);
-                return getTypeOfPropertyOfContextualType(type, "" + index)
-                    || getIndexTypeOfContextualType(type, 1 /* Number */)
-                    || (languageVersion >= 2 /* ES6 */ ? getElementTypeOfIterable(type, /*errorNode*/ undefined) : undefined);
-            }
-            return undefined;
-        }
-        // In a contextually typed conditional expression, the true/false expressions are contextually typed by the same type.
-        function getContextualTypeForConditionalOperand(node) {
-            var conditional = node.parent;
-            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
-        }
-        function getContextualTypeForJsxAttribute(attribute) {
-            var kind = attribute.kind;
-            var jsxElement = attribute.parent;
-            var attrsType = getJsxElementAttributesType(jsxElement);
-            if (attribute.kind === 246 /* JsxAttribute */) {
-                if (!attrsType || isTypeAny(attrsType)) {
-                    return undefined;
-                }
-                return getTypeOfPropertyOfType(attrsType, attribute.name.text);
-            }
-            else if (attribute.kind === 247 /* JsxSpreadAttribute */) {
-                return attrsType;
-            }
-            ts.Debug.fail("Expected JsxAttribute or JsxSpreadAttribute, got ts.SyntaxKind[" + kind + "]");
-        }
-        // Return the contextual type for a given expression node. During overload resolution, a contextual type may temporarily
-        // be "pushed" onto a node using the contextualType property.
-        function getApparentTypeOfContextualType(node) {
-            var type = getContextualType(node);
-            return type && getApparentType(type);
-        }
-        /**
-         * Woah! Do you really want to use this function?
-         *
-         * Unless you're trying to get the *non-apparent* type for a
-         * value-literal type or you're authoring relevant portions of this algorithm,
-         * you probably meant to use 'getApparentTypeOfContextualType'.
-         * Otherwise this may not be very useful.
-         *
-         * In cases where you *are* working on this function, you should understand
-         * when it is appropriate to use 'getContextualType' and 'getApparentTypeOfContextualType'.
-         *
-         *   - Use 'getContextualType' when you are simply going to propagate the result to the expression.
-         *   - Use 'getApparentTypeOfContextualType' when you're going to need the members of the type.
-         *
-         * @param node the expression whose contextual type will be returned.
-         * @returns the contextual type of an expression.
-         */
-        function getContextualType(node) {
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return undefined;
-            }
-            if (node.contextualType) {
-                return node.contextualType;
-            }
-            var parent = node.parent;
-            switch (parent.kind) {
-                case 218 /* VariableDeclaration */:
-                case 142 /* Parameter */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 169 /* BindingElement */:
-                    return getContextualTypeForInitializerExpression(node);
-                case 180 /* ArrowFunction */:
-                case 211 /* ReturnStatement */:
-                    return getContextualTypeForReturnExpression(node);
-                case 190 /* YieldExpression */:
-                    return getContextualTypeForYieldOperand(parent);
-                case 174 /* CallExpression */:
-                case 175 /* NewExpression */:
-                    return getContextualTypeForArgument(parent, node);
-                case 177 /* TypeAssertionExpression */:
-                case 195 /* AsExpression */:
-                    return getTypeFromTypeNode(parent.type);
-                case 187 /* BinaryExpression */:
-                    return getContextualTypeForBinaryOperand(node);
-                case 253 /* PropertyAssignment */:
-                    return getContextualTypeForObjectLiteralElement(parent);
-                case 170 /* ArrayLiteralExpression */:
-                    return getContextualTypeForElementExpression(node);
-                case 188 /* ConditionalExpression */:
-                    return getContextualTypeForConditionalOperand(node);
-                case 197 /* TemplateSpan */:
-                    ts.Debug.assert(parent.parent.kind === 189 /* TemplateExpression */);
-                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
-                case 178 /* ParenthesizedExpression */:
-                    return getContextualType(parent);
-                case 248 /* JsxExpression */:
-                    return getContextualType(parent);
-                case 246 /* JsxAttribute */:
-                case 247 /* JsxSpreadAttribute */:
-                    return getContextualTypeForJsxAttribute(parent);
-            }
-            return undefined;
-        }
-        // If the given type is an object or union type, if that type has a single signature, and if
-        // that signature is non-generic, return the signature. Otherwise return undefined.
-        function getNonGenericSignature(type) {
-            var signatures = getSignaturesOfStructuredType(type, 0 /* Call */);
-            if (signatures.length === 1) {
-                var signature = signatures[0];
-                if (!signature.typeParameters) {
-                    return signature;
-                }
-            }
-        }
-        function isFunctionExpressionOrArrowFunction(node) {
-            return node.kind === 179 /* FunctionExpression */ || node.kind === 180 /* ArrowFunction */;
-        }
-        function getContextualSignatureForFunctionLikeDeclaration(node) {
-            // Only function expressions, arrow functions, and object literal methods are contextually typed.
-            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
-                ? getContextualSignature(node)
-                : undefined;
-        }
-        function getContextualTypeForFunctionLikeDeclaration(node) {
-            return ts.isObjectLiteralMethod(node) ?
-                getContextualTypeForObjectLiteralMethod(node) :
-                getApparentTypeOfContextualType(node);
-        }
-        // Return the contextual signature for a given expression node. A contextual type provides a
-        // contextual signature if it has a single call signature and if that call signature is non-generic.
-        // If the contextual type is a union type, get the signature from each type possible and if they are
-        // all identical ignoring their return type, the result is same signature but with return type as
-        // union type of return types from these signatures
-        function getContextualSignature(node) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            var type = getContextualTypeForFunctionLikeDeclaration(node);
-            if (!type) {
-                return undefined;
-            }
-            if (!(type.flags & 16384 /* Union */)) {
-                return getNonGenericSignature(type);
-            }
-            var signatureList;
-            var types = type.types;
-            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
-                var current = types_9[_i];
-                var signature = getNonGenericSignature(current);
-                if (signature) {
-                    if (!signatureList) {
-                        // This signature will contribute to contextual union signature
-                        signatureList = [signature];
-                    }
-                    else if (!compareSignaturesIdentical(signatureList[0], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true, compareTypesIdentical)) {
-                        // Signatures aren't identical, do not use
-                        return undefined;
-                    }
-                    else {
-                        // Use this signature for contextual union signature
-                        signatureList.push(signature);
-                    }
-                }
-            }
-            // Result is union of signatures collected (return type is union of return types of this signature set)
-            var result;
-            if (signatureList) {
-                result = cloneSignature(signatureList[0]);
-                // Clear resolved return type we possibly got from cloneSignature
-                result.resolvedReturnType = undefined;
-                result.unionSignatures = signatureList;
-            }
-            return result;
-        }
-        /**
-         * Detect if the mapper implies an inference context. Specifically, there are 4 possible values
-         * for a mapper. Let's go through each one of them:
-         *
-         *    1. undefined - this means we are not doing inferential typing, but we may do contextual typing,
-         *       which could cause us to assign a parameter a type
-         *    2. identityMapper - means we want to avoid assigning a parameter a type, whether or not we are in
-         *       inferential typing (context is undefined for the identityMapper)
-         *    3. a mapper created by createInferenceMapper - we are doing inferential typing, we want to assign
-         *       types to parameters and fix type parameters (context is defined)
-         *    4. an instantiation mapper created by createTypeMapper or createTypeEraser - this should never be
-         *       passed as the contextual mapper when checking an expression (context is undefined for these)
-         *
-         * isInferentialContext is detecting if we are in case 3
-         */
-        function isInferentialContext(mapper) {
-            return mapper && mapper.context;
-        }
-        function checkSpreadElementExpression(node, contextualMapper) {
-            // It is usually not safe to call checkExpressionCached if we can be contextually typing.
-            // You can tell that we are contextually typing because of the contextualMapper parameter.
-            // While it is true that a spread element can have a contextual type, it does not do anything
-            // with this type. It is neither affected by it, nor does it propagate it to its operand.
-            // So the fact that contextualMapper is passed is not important, because the operand of a spread
-            // element is not contextually typed.
-            var arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
-            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, /*allowStringInput*/ false);
-        }
-        function hasDefaultValue(node) {
-            return (node.kind === 169 /* BindingElement */ && !!node.initializer) ||
-                (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 56 /* EqualsToken */);
-        }
-        function checkArrayLiteral(node, contextualMapper) {
-            var elements = node.elements;
-            var hasSpreadElement = false;
-            var elementTypes = [];
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
-            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
-                var e = elements_1[_i];
-                if (inDestructuringPattern && e.kind === 191 /* SpreadElementExpression */) {
-                    // Given the following situation:
-                    //    var c: {};
-                    //    [...c] = ["", 0];
-                    //
-                    // c is represented in the tree as a spread element in an array literal.
-                    // But c really functions as a rest element, and its purpose is to provide
-                    // a contextual type for the right hand side of the assignment. Therefore,
-                    // instead of calling checkExpression on "...c", which will give an error
-                    // if c is not iterable/array-like, we need to act as if we are trying to
-                    // get the contextual element type from it. So we do something similar to
-                    // getContextualTypeForElementExpression, which will crucially not error
-                    // if there is no index type / iterated type.
-                    var restArrayType = checkExpression(e.expression, contextualMapper);
-                    var restElementType = getIndexTypeOfType(restArrayType, 1 /* Number */) ||
-                        (languageVersion >= 2 /* ES6 */ ? getElementTypeOfIterable(restArrayType, /*errorNode*/ undefined) : undefined);
-                    if (restElementType) {
-                        elementTypes.push(restElementType);
-                    }
-                }
-                else {
-                    var type = checkExpression(e, contextualMapper);
-                    elementTypes.push(type);
-                }
-                hasSpreadElement = hasSpreadElement || e.kind === 191 /* SpreadElementExpression */;
-            }
-            if (!hasSpreadElement) {
-                // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
-                // that we get the same behavior for "var [x, y] = []" and "[x, y] = []".
-                if (inDestructuringPattern && elementTypes.length) {
-                    var type = createNewTupleType(elementTypes);
-                    type.pattern = node;
-                    return type;
-                }
-                var contextualType = getApparentTypeOfContextualType(node);
-                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
-                    var pattern = contextualType.pattern;
-                    // If array literal is contextually typed by a binding pattern or an assignment pattern, pad the resulting
-                    // tuple type with the corresponding binding or assignment element types to make the lengths equal.
-                    if (pattern && (pattern.kind === 168 /* ArrayBindingPattern */ || pattern.kind === 170 /* ArrayLiteralExpression */)) {
-                        var patternElements = pattern.elements;
-                        for (var i = elementTypes.length; i < patternElements.length; i++) {
-                            var patternElement = patternElements[i];
-                            if (hasDefaultValue(patternElement)) {
-                                elementTypes.push(contextualType.elementTypes[i]);
-                            }
-                            else {
-                                if (patternElement.kind !== 193 /* OmittedExpression */) {
-                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
-                                }
-                                elementTypes.push(unknownType);
-                            }
-                        }
-                    }
-                    if (elementTypes.length) {
-                        return createTupleType(elementTypes);
-                    }
-                }
-            }
-            return createArrayType(elementTypes.length ? getUnionType(elementTypes) : emptyArrayElementType);
-        }
-        function isNumericName(name) {
-            return name.kind === 140 /* ComputedPropertyName */ ? isNumericComputedName(name) : isNumericLiteralName(name.text);
-        }
-        function isNumericComputedName(name) {
-            // It seems odd to consider an expression of type Any to result in a numeric name,
-            // but this behavior is consistent with checkIndexedAccess
-            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 132 /* NumberLike */);
-        }
-        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
-            return isTypeAny(type) || isTypeOfKind(type, kind);
-        }
-        function isNumericLiteralName(name) {
-            // The intent of numeric names is that
-            //     - they are names with text in a numeric form, and that
-            //     - setting properties/indexing with them is always equivalent to doing so with the numeric literal 'numLit',
-            //         acquired by applying the abstract 'ToNumber' operation on the name's text.
-            //
-            // The subtlety is in the latter portion, as we cannot reliably say that anything that looks like a numeric literal is a numeric name.
-            // In fact, it is the case that the text of the name must be equal to 'ToString(numLit)' for this to hold.
-            //
-            // Consider the property name '"0xF00D"'. When one indexes with '0xF00D', they are actually indexing with the value of 'ToString(0xF00D)'
-            // according to the ECMAScript specification, so it is actually as if the user indexed with the string '"61453"'.
-            // Thus, the text of all numeric literals equivalent to '61543' such as '0xF00D', '0xf00D', '0170015', etc. are not valid numeric names
-            // because their 'ToString' representation is not equal to their original text.
-            // This is motivated by ECMA-262 sections 9.3.1, 9.8.1, 11.1.5, and 11.2.1.
-            //
-            // Here, we test whether 'ToString(ToNumber(name))' is exactly equal to 'name'.
-            // The '+' prefix operator is equivalent here to applying the abstract ToNumber operation.
-            // Applying the 'toString()' method on a number gives us the abstract ToString operation on a number.
-            //
-            // Note that this accepts the values 'Infinity', '-Infinity', and 'NaN', and that this is intentional.
-            // This is desired behavior, because when indexing with them as numeric entities, you are indexing
-            // with the strings '"Infinity"', '"-Infinity"', and '"NaN"' respectively.
-            return (+name).toString() === name;
-        }
-        function checkComputedPropertyName(node) {
-            var links = getNodeLinks(node.expression);
-            if (!links.resolvedType) {
-                links.resolvedType = checkExpression(node.expression);
-                // This will allow types number, string, symbol or any. It will also allow enums, the unknown
-                // type, and any union of these types (like string | number).
-                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 132 /* NumberLike */ | 258 /* StringLike */ | 16777216 /* ESSymbol */)) {
-                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
-                }
-                else {
-                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, /*reportError*/ true);
-                }
-            }
-            return links.resolvedType;
-        }
-        function getObjectLiteralIndexInfo(node, properties, kind) {
-            var propTypes = [];
-            for (var i = 0; i < properties.length; i++) {
-                if (kind === 0 /* String */ || isNumericName(node.properties[i].name)) {
-                    propTypes.push(getTypeOfSymbol(properties[i]));
-                }
-            }
-            var unionType = propTypes.length ? getUnionType(propTypes) : undefinedType;
-            return createIndexInfo(unionType, /*isReadonly*/ false);
-        }
-        function checkObjectLiteral(node, contextualMapper) {
-            var inDestructuringPattern = ts.isAssignmentTarget(node);
-            // Grammar checking
-            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
-            var propertiesTable = {};
-            var propertiesArray = [];
-            var contextualType = getApparentTypeOfContextualType(node);
-            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
-                (contextualType.pattern.kind === 167 /* ObjectBindingPattern */ || contextualType.pattern.kind === 171 /* ObjectLiteralExpression */);
-            var typeFlags = 0;
-            var patternWithComputedProperties = false;
-            var hasComputedStringProperty = false;
-            var hasComputedNumberProperty = false;
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var memberDecl = _a[_i];
-                var member = memberDecl.symbol;
-                if (memberDecl.kind === 253 /* PropertyAssignment */ ||
-                    memberDecl.kind === 254 /* ShorthandPropertyAssignment */ ||
-                    ts.isObjectLiteralMethod(memberDecl)) {
-                    var type = void 0;
-                    if (memberDecl.kind === 253 /* PropertyAssignment */) {
-                        type = checkPropertyAssignment(memberDecl, contextualMapper);
-                    }
-                    else if (memberDecl.kind === 147 /* MethodDeclaration */) {
-                        type = checkObjectLiteralMethod(memberDecl, contextualMapper);
-                    }
-                    else {
-                        ts.Debug.assert(memberDecl.kind === 254 /* ShorthandPropertyAssignment */);
-                        type = checkExpression(memberDecl.name, contextualMapper);
-                    }
-                    typeFlags |= type.flags;
-                    var prop = createSymbol(4 /* Property */ | 67108864 /* Transient */ | member.flags, member.name);
-                    if (inDestructuringPattern) {
-                        // If object literal is an assignment pattern and if the assignment pattern specifies a default value
-                        // for the property, make the property optional.
-                        var isOptional = (memberDecl.kind === 253 /* PropertyAssignment */ && hasDefaultValue(memberDecl.initializer)) ||
-                            (memberDecl.kind === 254 /* ShorthandPropertyAssignment */ && memberDecl.objectAssignmentInitializer);
-                        if (isOptional) {
-                            prop.flags |= 536870912 /* Optional */;
-                        }
-                        if (ts.hasDynamicName(memberDecl)) {
-                            patternWithComputedProperties = true;
-                        }
-                    }
-                    else if (contextualTypeHasPattern && !(contextualType.flags & 67108864 /* ObjectLiteralPatternWithComputedProperties */)) {
-                        // If object literal is contextually typed by the implied type of a binding pattern, and if the
-                        // binding pattern specifies a default value for the property, make the property optional.
-                        var impliedProp = getPropertyOfType(contextualType, member.name);
-                        if (impliedProp) {
-                            prop.flags |= impliedProp.flags & 536870912 /* Optional */;
-                        }
-                        else if (!compilerOptions.suppressExcessPropertyErrors) {
-                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
-                        }
-                    }
-                    prop.declarations = member.declarations;
-                    prop.parent = member.parent;
-                    if (member.valueDeclaration) {
-                        prop.valueDeclaration = member.valueDeclaration;
-                    }
-                    prop.type = type;
-                    prop.target = member;
-                    member = prop;
-                }
-                else {
-                    // TypeScript 1.0 spec (April 2014)
-                    // A get accessor declaration is processed in the same manner as
-                    // an ordinary function declaration(section 6.1) with no parameters.
-                    // A set accessor declaration is processed in the same manner
-                    // as an ordinary function declaration with a single parameter and a Void return type.
-                    ts.Debug.assert(memberDecl.kind === 149 /* GetAccessor */ || memberDecl.kind === 150 /* SetAccessor */);
-                    checkAccessorDeclaration(memberDecl);
-                }
-                if (ts.hasDynamicName(memberDecl)) {
-                    if (isNumericName(memberDecl.name)) {
-                        hasComputedNumberProperty = true;
-                    }
-                    else {
-                        hasComputedStringProperty = true;
-                    }
-                }
-                else {
-                    propertiesTable[member.name] = member;
-                }
-                propertiesArray.push(member);
-            }
-            // If object literal is contextually typed by the implied type of a binding pattern, augment the result
-            // type with those properties for which the binding pattern specifies a default value.
-            if (contextualTypeHasPattern) {
-                for (var _b = 0, _c = getPropertiesOfType(contextualType); _b < _c.length; _b++) {
-                    var prop = _c[_b];
-                    if (!ts.hasProperty(propertiesTable, prop.name)) {
-                        if (!(prop.flags & 536870912 /* Optional */)) {
-                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
-                        }
-                        propertiesTable[prop.name] = prop;
-                        propertiesArray.push(prop);
-                    }
-                }
-            }
-            var stringIndexInfo = hasComputedStringProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 0 /* String */) : undefined;
-            var numberIndexInfo = hasComputedNumberProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 1 /* Number */) : undefined;
-            var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
-            var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576 /* FreshObjectLiteral */;
-            result.flags |= 524288 /* ObjectLiteral */ | 4194304 /* ContainsObjectLiteral */ | freshObjectLiteralFlag | (typeFlags & 14680064 /* PropagatingFlags */) | (patternWithComputedProperties ? 67108864 /* ObjectLiteralPatternWithComputedProperties */ : 0);
-            if (inDestructuringPattern) {
-                result.pattern = node;
-            }
-            return result;
-        }
-        function checkJsxSelfClosingElement(node) {
-            checkJsxOpeningLikeElement(node);
-            return jsxElementType || anyType;
-        }
-        function checkJsxElement(node) {
-            // Check attributes
-            checkJsxOpeningLikeElement(node.openingElement);
-            // Perform resolution on the closing tag so that rename/go to definition/etc work
-            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
-                getIntrinsicTagSymbol(node.closingElement);
-            }
-            else {
-                checkExpression(node.closingElement.tagName);
-            }
-            // Check children
-            for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
-                var child = _a[_i];
-                switch (child.kind) {
-                    case 248 /* JsxExpression */:
-                        checkJsxExpression(child);
-                        break;
-                    case 241 /* JsxElement */:
-                        checkJsxElement(child);
-                        break;
-                    case 242 /* JsxSelfClosingElement */:
-                        checkJsxSelfClosingElement(child);
-                        break;
-                }
-            }
-            return jsxElementType || anyType;
-        }
-        /**
-         * Returns true iff the JSX element name would be a valid JS identifier, ignoring restrictions about keywords not being identifiers
-         */
-        function isUnhyphenatedJsxName(name) {
-            // - is the only character supported in JSX attribute names that isn't valid in JavaScript identifiers
-            return name.indexOf("-") < 0;
-        }
-        /**
-         * Returns true iff React would emit this tag name as a string rather than an identifier or qualified name
-         */
-        function isJsxIntrinsicIdentifier(tagName) {
-            if (tagName.kind === 139 /* QualifiedName */) {
-                return false;
-            }
-            else {
-                return ts.isIntrinsicJsxName(tagName.text);
-            }
-        }
-        function checkJsxAttribute(node, elementAttributesType, nameTable) {
-            var correspondingPropType = undefined;
-            // Look up the corresponding property for this attribute
-            if (elementAttributesType === emptyObjectType && isUnhyphenatedJsxName(node.name.text)) {
-                // If there is no 'props' property, you may not have non-"data-" attributes
-                error(node.parent, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
-            }
-            else if (elementAttributesType && !isTypeAny(elementAttributesType)) {
-                var correspondingPropSymbol = getPropertyOfType(elementAttributesType, node.name.text);
-                correspondingPropType = correspondingPropSymbol && getTypeOfSymbol(correspondingPropSymbol);
-                if (isUnhyphenatedJsxName(node.name.text)) {
-                    // Maybe there's a string indexer?
-                    var indexerType = getIndexTypeOfType(elementAttributesType, 0 /* String */);
-                    if (indexerType) {
-                        correspondingPropType = indexerType;
-                    }
-                    else {
-                        // If there's no corresponding property with this name, error
-                        if (!correspondingPropType) {
-                            error(node.name, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.name.text, typeToString(elementAttributesType));
-                            return unknownType;
-                        }
-                    }
-                }
-            }
-            var exprType;
-            if (node.initializer) {
-                exprType = checkExpression(node.initializer);
-            }
-            else {
-                // <Elem attr /> is sugar for <Elem attr={true} />
-                exprType = booleanType;
-            }
-            if (correspondingPropType) {
-                checkTypeAssignableTo(exprType, correspondingPropType, node);
-            }
-            nameTable[node.name.text] = true;
-            return exprType;
-        }
-        function checkJsxSpreadAttribute(node, elementAttributesType, nameTable) {
-            var type = checkExpression(node.expression);
-            var props = getPropertiesOfType(type);
-            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
-                var prop = props_2[_i];
-                // Is there a corresponding property in the element attributes type? Skip checking of properties
-                // that have already been assigned to, as these are not actually pushed into the resulting type
-                if (!nameTable[prop.name]) {
-                    var targetPropSym = getPropertyOfType(elementAttributesType, prop.name);
-                    if (targetPropSym) {
-                        var msg = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property, prop.name);
-                        checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(targetPropSym), node, undefined, msg);
-                    }
-                    nameTable[prop.name] = true;
-                }
-            }
-            return type;
-        }
-        function getJsxType(name) {
-            if (jsxTypes[name] === undefined) {
-                return jsxTypes[name] = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType;
-            }
-            return jsxTypes[name];
-        }
-        /**
-          * Looks up an intrinsic tag name and returns a symbol that either points to an intrinsic
-          * property (in which case nodeLinks.jsxFlags will be IntrinsicNamedElement) or an intrinsic
-          * string index signature (in which case nodeLinks.jsxFlags will be IntrinsicIndexedElement).
-          * May also return unknownSymbol if both of these lookups fail.
-          */
-        function getIntrinsicTagSymbol(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedSymbol) {
-                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
-                if (intrinsicElementsType !== unknownType) {
-                    // Property case
-                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
-                    if (intrinsicProp) {
-                        links.jsxFlags |= 1 /* IntrinsicNamedElement */;
-                        return links.resolvedSymbol = intrinsicProp;
-                    }
-                    // Intrinsic string indexer case
-                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
-                    if (indexSignatureType) {
-                        links.jsxFlags |= 2 /* IntrinsicIndexedElement */;
-                        return links.resolvedSymbol = intrinsicElementsType.symbol;
-                    }
-                    // Wasn't found
-                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
-                    return links.resolvedSymbol = unknownSymbol;
-                }
-                else {
-                    if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
-                    }
-                    return links.resolvedSymbol = unknownSymbol;
-                }
-            }
-            return links.resolvedSymbol;
-        }
-        /**
-         * Given a JSX element that is a class element, finds the Element Instance Type. If the
-         * element is not a class element, or the class element type cannot be determined, returns 'undefined'.
-         * For example, in the element <MyClass>, the element instance type is `MyClass` (not `typeof MyClass`).
-         */
-        function getJsxElementInstanceType(node, valueType) {
-            ts.Debug.assert(!(valueType.flags & 16384 /* Union */));
-            if (isTypeAny(valueType)) {
-                // Short-circuit if the class tag is using an element type 'any'
-                return anyType;
-            }
-            // Resolve the signatures, preferring constructor
-            var signatures = getSignaturesOfType(valueType, 1 /* Construct */);
-            if (signatures.length === 0) {
-                // No construct signatures, try call signatures
-                signatures = getSignaturesOfType(valueType, 0 /* Call */);
-                if (signatures.length === 0) {
-                    // We found no signatures at all, which is an error
-                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
-                    return unknownType;
-                }
-            }
-            return getUnionType(signatures.map(getReturnTypeOfSignature));
-        }
-        /// e.g. "props" for React.d.ts,
-        /// or 'undefined' if ElementAttributesProperty doesn't exist (which means all
-        ///     non-intrinsic elements' attributes type is 'any'),
-        /// or '' if it has 0 properties (which means every
-        ///     non-intrinsic elements' attributes type is the element instance type)
-        function getJsxElementPropertiesName() {
-            // JSX
-            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1536 /* Namespace */, /*diagnosticMessage*/ undefined);
-            // JSX.ElementAttributesProperty [symbol]
-            var attribsPropTypeSym = jsxNamespace && getSymbol(jsxNamespace.exports, JsxNames.ElementAttributesPropertyNameContainer, 793056 /* Type */);
-            // JSX.ElementAttributesProperty [type]
-            var attribPropType = attribsPropTypeSym && getDeclaredTypeOfSymbol(attribsPropTypeSym);
-            // The properties of JSX.ElementAttributesProperty
-            var attribProperties = attribPropType && getPropertiesOfType(attribPropType);
-            if (attribProperties) {
-                // Element Attributes has zero properties, so the element attributes type will be the class instance type
-                if (attribProperties.length === 0) {
-                    return "";
-                }
-                else if (attribProperties.length === 1) {
-                    return attribProperties[0].name;
-                }
-                else {
-                    error(attribsPropTypeSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, JsxNames.ElementAttributesPropertyNameContainer);
-                    return undefined;
-                }
-            }
-            else {
-                // No interface exists, so the element attributes type will be an implicit any
-                return undefined;
-            }
-        }
-        /**
-         * Given React element instance type and the class type, resolve the Jsx type
-         * Pass elemType to handle individual type in the union typed element type.
-         */
-        function getResolvedJsxType(node, elemType, elemClassType) {
-            if (!elemType) {
-                elemType = checkExpression(node.tagName);
-            }
-            if (elemType.flags & 16384 /* Union */) {
-                var types = elemType.types;
-                return getUnionType(types.map(function (type) {
-                    return getResolvedJsxType(node, type, elemClassType);
-                }));
-            }
-            // Get the element instance type (the result of newing or invoking this tag)
-            var elemInstanceType = getJsxElementInstanceType(node, elemType);
-            if (!elemClassType || !isTypeAssignableTo(elemInstanceType, elemClassType)) {
-                // Is this is a stateless function component? See if its single signature's return type is
-                // assignable to the JSX Element Type
-                if (jsxElementType) {
-                    var callSignatures = elemType && getSignaturesOfType(elemType, 0 /* Call */);
-                    var callSignature = callSignatures && callSignatures.length > 0 && callSignatures[0];
-                    var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
-                    var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
-                    if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType)) {
-                        // Intersect in JSX.IntrinsicAttributes if it exists
-                        var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
-                        if (intrinsicAttributes !== unknownType) {
-                            paramType = intersectTypes(intrinsicAttributes, paramType);
-                        }
-                        return paramType;
-                    }
-                }
-            }
-            // Issue an error if this return type isn't assignable to JSX.ElementClass
-            if (elemClassType) {
-                checkTypeRelatedTo(elemInstanceType, elemClassType, assignableRelation, node, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
-            }
-            if (isTypeAny(elemInstanceType)) {
-                return elemInstanceType;
-            }
-            var propsName = getJsxElementPropertiesName();
-            if (propsName === undefined) {
-                // There is no type ElementAttributesProperty, return 'any'
-                return anyType;
-            }
-            else if (propsName === "") {
-                // If there is no e.g. 'props' member in ElementAttributesProperty, use the element class type instead
-                return elemInstanceType;
-            }
-            else {
-                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
-                if (!attributesType) {
-                    // There is no property named 'props' on this instance type
-                    return emptyObjectType;
-                }
-                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
-                    // Props is of type 'any' or unknown
-                    return attributesType;
-                }
-                else if (attributesType.flags & 16384 /* Union */) {
-                    // Props cannot be a union type
-                    error(node.tagName, ts.Diagnostics.JSX_element_attributes_type_0_may_not_be_a_union_type, typeToString(attributesType));
-                    return anyType;
-                }
-                else {
-                    // Normal case -- add in IntrinsicClassElements<T> and IntrinsicElements
-                    var apparentAttributesType = attributesType;
-                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
-                    if (intrinsicClassAttribs !== unknownType) {
-                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
-                        if (typeParams) {
-                            if (typeParams.length === 1) {
-                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
-                            }
-                        }
-                        else {
-                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
-                        }
-                    }
-                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
-                    if (intrinsicAttribs !== unknownType) {
-                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
-                    }
-                    return apparentAttributesType;
-                }
-            }
-        }
-        /**
-         * Given an opening/self-closing element, get the 'element attributes type', i.e. the type that tells
-         * us which attributes are valid on a given element.
-         */
-        function getJsxElementAttributesType(node) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedJsxType) {
-                if (isJsxIntrinsicIdentifier(node.tagName)) {
-                    var symbol = getIntrinsicTagSymbol(node);
-                    if (links.jsxFlags & 1 /* IntrinsicNamedElement */) {
-                        return links.resolvedJsxType = getTypeOfSymbol(symbol);
-                    }
-                    else if (links.jsxFlags & 2 /* IntrinsicIndexedElement */) {
-                        return links.resolvedJsxType = getIndexInfoOfSymbol(symbol, 0 /* String */).type;
-                    }
-                    else {
-                        return links.resolvedJsxType = unknownType;
-                    }
-                }
-                else {
-                    var elemClassType = getJsxGlobalElementClassType();
-                    return links.resolvedJsxType = getResolvedJsxType(node, undefined, elemClassType);
-                }
-            }
-            return links.resolvedJsxType;
-        }
-        /**
-         * Given a JSX attribute, returns the symbol for the corresponds property
-         * of the element attributes type. Will return unknownSymbol for attributes
-         * that have no matching element attributes type property.
-         */
-        function getJsxAttributePropertySymbol(attrib) {
-            var attributesType = getJsxElementAttributesType(attrib.parent);
-            var prop = getPropertyOfType(attributesType, attrib.name.text);
-            return prop || unknownSymbol;
-        }
-        function getJsxGlobalElementClassType() {
-            if (!jsxElementClassType) {
-                jsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
-            }
-            return jsxElementClassType;
-        }
-        /// Returns all the properties of the Jsx.IntrinsicElements interface
-        function getJsxIntrinsicTagNames() {
-            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
-            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
-        }
-        function checkJsxPreconditions(errorNode) {
-            // Preconditions for using JSX
-            if ((compilerOptions.jsx || 0 /* None */) === 0 /* None */) {
-                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
-            }
-            if (jsxElementType === undefined) {
-                if (compilerOptions.noImplicitAny) {
-                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
-                }
-            }
-        }
-        function checkJsxOpeningLikeElement(node) {
-            checkGrammarJsxElement(node);
-            checkJsxPreconditions(node);
-            // The reactNamespace symbol should be marked as 'used' so we don't incorrectly elide its import. And if there
-            // is no reactNamespace symbol in scope when targeting React emit, we should issue an error.
-            var reactRefErr = compilerOptions.jsx === 2 /* React */ ? ts.Diagnostics.Cannot_find_name_0 : undefined;
-            var reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
-            var reactSym = resolveName(node.tagName, reactNamespace, 107455 /* Value */, reactRefErr, reactNamespace);
-            if (reactSym) {
-                getSymbolLinks(reactSym).referenced = true;
-            }
-            var targetAttributesType = getJsxElementAttributesType(node);
-            var nameTable = {};
-            // Process this array in right-to-left order so we know which
-            // attributes (mostly from spreads) are being overwritten and
-            // thus should have their types ignored
-            var sawSpreadedAny = false;
-            for (var i = node.attributes.length - 1; i >= 0; i--) {
-                if (node.attributes[i].kind === 246 /* JsxAttribute */) {
-                    checkJsxAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                }
-                else {
-                    ts.Debug.assert(node.attributes[i].kind === 247 /* JsxSpreadAttribute */);
-                    var spreadType = checkJsxSpreadAttribute((node.attributes[i]), targetAttributesType, nameTable);
-                    if (isTypeAny(spreadType)) {
-                        sawSpreadedAny = true;
-                    }
-                }
-            }
-            // Check that all required properties have been provided. If an 'any'
-            // was spreaded in, though, assume that it provided all required properties
-            if (targetAttributesType && !sawSpreadedAny) {
-                var targetProperties = getPropertiesOfType(targetAttributesType);
-                for (var i = 0; i < targetProperties.length; i++) {
-                    if (!(targetProperties[i].flags & 536870912 /* Optional */) &&
-                        nameTable[targetProperties[i].name] === undefined) {
-                        error(node, ts.Diagnostics.Property_0_is_missing_in_type_1, targetProperties[i].name, typeToString(targetAttributesType));
-                    }
-                }
-            }
-        }
-        function checkJsxExpression(node) {
-            if (node.expression) {
-                return checkExpression(node.expression);
-            }
-            else {
-                return unknownType;
-            }
-        }
-        // If a symbol is a synthesized symbol with no value declaration, we assume it is a property. Example of this are the synthesized
-        // '.prototype' property as well as synthesized tuple index properties.
-        function getDeclarationKindFromSymbol(s) {
-            return s.valueDeclaration ? s.valueDeclaration.kind : 145 /* PropertyDeclaration */;
-        }
-        function getDeclarationFlagsFromSymbol(s) {
-            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : s.flags & 134217728 /* Prototype */ ? 4 /* Public */ | 32 /* Static */ : 0;
-        }
-        /**
-         * Check whether the requested property access is valid.
-         * Returns true if node is a valid property access, and false otherwise.
-         * @param node The node to be checked.
-         * @param left The left hand side of the property access (e.g.: the super in `super.foo`).
-         * @param type The type of left.
-         * @param prop The symbol for the right hand side of the property access.
-         */
-        function checkClassPropertyAccess(node, left, type, prop) {
-            var flags = getDeclarationFlagsFromSymbol(prop);
-            var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop));
-            var errorNode = node.kind === 172 /* PropertyAccessExpression */ || node.kind === 218 /* VariableDeclaration */ ?
-                node.name :
-                node.right;
-            if (left.kind === 95 /* SuperKeyword */) {
-                // TS 1.0 spec (April 2014): 4.8.2
-                // - In a constructor, instance member function, instance member accessor, or
-                //   instance member variable initializer where this references a derived class instance,
-                //   a super property access is permitted and must specify a public instance member function of the base class.
-                // - In a static member function or static member accessor
-                //   where this references the constructor function object of a derived class,
-                //   a super property access is permitted and must specify a public static member function of the base class.
-                if (languageVersion < 2 /* ES6 */ && getDeclarationKindFromSymbol(prop) !== 147 /* MethodDeclaration */) {
-                    // `prop` refers to a *property* declared in the super class
-                    // rather than a *method*, so it does not satisfy the above criteria.
-                    error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
-                    return false;
-                }
-                if (flags & 128 /* Abstract */) {
-                    // A method cannot be accessed in a super property access if the method is abstract.
-                    // This error could mask a private property access error. But, a member
-                    // cannot simultaneously be private and abstract, so this will trigger an
-                    // additional error elsewhere.
-                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-            }
-            // Public properties are otherwise accessible.
-            if (!(flags & (8 /* Private */ | 16 /* Protected */))) {
-                return true;
-            }
-            // Property is known to be private or protected at this point
-            // Private property is accessible if the property is within the declaring class
-            if (flags & 8 /* Private */) {
-                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
-                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass));
-                    return false;
-                }
-                return true;
-            }
-            // Property is known to be protected at this point
-            // All protected properties of a supertype are accessible in a super access
-            if (left.kind === 95 /* SuperKeyword */) {
-                return true;
-            }
-            // Get the enclosing class that has the declaring class as its base type
-            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
-                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
-                return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined;
-            });
-            // A protected property is accessible if the property is within the declaring class or classes derived from it
-            if (!enclosingClass) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass));
-                return false;
-            }
-            // No further restrictions for static properties
-            if (flags & 32 /* Static */) {
-                return true;
-            }
-            // An instance property must be accessed through an instance of the enclosing class
-            if (type.flags & 33554432 /* ThisType */) {
-                // get the original type -- represented as the type constraint of the 'this' type
-                type = getConstraintOfTypeParameter(type);
-            }
-            // TODO: why is the first part of this check here?
-            if (!(getTargetType(type).flags & (1024 /* Class */ | 2048 /* Interface */) && hasBaseType(type, enclosingClass))) {
-                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
-                return false;
-            }
-            return true;
-        }
-        function checkNonNullExpression(node) {
-            var type = checkExpression(node);
-            if (strictNullChecks) {
-                var kind = getNullableKind(type);
-                if (kind) {
-                    error(node, kind & 32 /* Undefined */ ? kind & 64 /* Null */ ?
-                        ts.Diagnostics.Object_is_possibly_null_or_undefined :
-                        ts.Diagnostics.Object_is_possibly_undefined :
-                        ts.Diagnostics.Object_is_possibly_null);
-                }
-                return getNonNullableType(type);
-            }
-            return type;
-        }
-        function checkPropertyAccessExpression(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
-        }
-        function checkQualifiedName(node) {
-            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
-        }
-        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
-            var type = checkNonNullExpression(left);
-            if (isTypeAny(type)) {
-                return type;
-            }
-            var apparentType = getApparentType(getWidenedType(type));
-            if (apparentType === unknownType) {
-                // handle cases when type is Type parameter with invalid constraint
-                return unknownType;
-            }
-            var prop = getPropertyOfType(apparentType, right.text);
-            if (!prop) {
-                if (right.text) {
-                    error(right, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(right), typeToString(type.flags & 33554432 /* ThisType */ ? apparentType : type));
-                }
-                return unknownType;
-            }
-            getNodeLinks(node).resolvedSymbol = prop;
-            if (prop.parent && prop.parent.flags & 32 /* Class */) {
-                checkClassPropertyAccess(node, left, apparentType, prop);
-            }
-            var propType = getTypeOfSymbol(prop);
-            if (node.kind !== 172 /* PropertyAccessExpression */ || ts.isAssignmentTarget(node) ||
-                !(propType.flags & 16384 /* Union */) && !(prop.flags & (3 /* Variable */ | 4 /* Property */ | 98304 /* Accessor */))) {
-                return propType;
-            }
-            var leftmostNode = getLeftmostIdentifierOrThis(node);
-            if (!leftmostNode) {
-                return propType;
-            }
-            if (leftmostNode.kind === 69 /* Identifier */) {
-                var leftmostSymbol = getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(leftmostNode));
-                if (!leftmostSymbol) {
-                    return propType;
-                }
-                var declaration = leftmostSymbol.valueDeclaration;
-                if (!declaration || declaration.kind !== 218 /* VariableDeclaration */ && declaration.kind !== 142 /* Parameter */ && declaration.kind !== 169 /* BindingElement */) {
-                    return propType;
-                }
-            }
-            return getFlowTypeOfReference(node, propType, /*assumeInitialized*/ true);
-        }
-        function isValidPropertyAccess(node, propertyName) {
-            var left = node.kind === 172 /* PropertyAccessExpression */
-                ? node.expression
-                : node.left;
-            var type = checkExpression(left);
-            if (type !== unknownType && !isTypeAny(type)) {
-                var prop = getPropertyOfType(getWidenedType(type), propertyName);
-                if (prop && prop.parent && prop.parent.flags & 32 /* Class */) {
-                    return checkClassPropertyAccess(node, left, type, prop);
-                }
-            }
-            return true;
-        }
-        /**
-         * Return the symbol of the for-in variable declared or referenced by the given for-in statement.
-         */
-        function getForInVariableSymbol(node) {
-            var initializer = node.initializer;
-            if (initializer.kind === 219 /* VariableDeclarationList */) {
-                var variable = initializer.declarations[0];
-                if (variable && !ts.isBindingPattern(variable.name)) {
-                    return getSymbolOfNode(variable);
-                }
-            }
-            else if (initializer.kind === 69 /* Identifier */) {
-                return getResolvedSymbol(initializer);
-            }
-            return undefined;
-        }
-        /**
-         * Return true if the given type is considered to have numeric property names.
-         */
-        function hasNumericPropertyNames(type) {
-            return getIndexTypeOfType(type, 1 /* Number */) && !getIndexTypeOfType(type, 0 /* String */);
-        }
-        /**
-         * Return true if given node is an expression consisting of an identifier (possibly parenthesized)
-         * that references a for-in variable for an object with numeric property names.
-         */
-        function isForInVariableForNumericPropertyNames(expr) {
-            var e = skipParenthesizedNodes(expr);
-            if (e.kind === 69 /* Identifier */) {
-                var symbol = getResolvedSymbol(e);
-                if (symbol.flags & 3 /* Variable */) {
-                    var child = expr;
-                    var node = expr.parent;
-                    while (node) {
-                        if (node.kind === 207 /* ForInStatement */ &&
-                            child === node.statement &&
-                            getForInVariableSymbol(node) === symbol &&
-                            hasNumericPropertyNames(checkExpression(node.expression))) {
-                            return true;
-                        }
-                        child = node;
-                        node = node.parent;
-                    }
-                }
-            }
-            return false;
-        }
-        function checkIndexedAccess(node) {
-            // Grammar checking
-            if (!node.argumentExpression) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                if (node.parent.kind === 175 /* NewExpression */ && node.parent.expression === node) {
-                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
-                }
-                else {
-                    var start = node.end - "]".length;
-                    var end = node.end;
-                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
-                }
-            }
-            // Obtain base constraint such that we can bail out if the constraint is an unknown type
-            var objectType = getApparentType(checkNonNullExpression(node.expression));
-            var indexType = node.argumentExpression ? checkExpression(node.argumentExpression) : unknownType;
-            if (objectType === unknownType) {
-                return unknownType;
-            }
-            var isConstEnum = isConstEnumObjectType(objectType);
-            if (isConstEnum &&
-                (!node.argumentExpression || node.argumentExpression.kind !== 9 /* StringLiteral */)) {
-                error(node.argumentExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
-                return unknownType;
-            }
-            // TypeScript 1.0 spec (April 2014): 4.10 Property Access
-            // - If IndexExpr is a string literal or a numeric literal and ObjExpr's apparent type has a property with the name
-            //    given by that literal(converted to its string representation in the case of a numeric literal), the property access is of the type of that property.
-            // - Otherwise, if ObjExpr's apparent type has a numeric index signature and IndexExpr is of type Any, the Number primitive type, or an enum type,
-            //    the property access is of the type of that index signature.
-            // - Otherwise, if ObjExpr's apparent type has a string index signature and IndexExpr is of type Any, the String or Number primitive type, or an enum type,
-            //    the property access is of the type of that index signature.
-            // - Otherwise, if IndexExpr is of type Any, the String or Number primitive type, or an enum type, the property access is of type Any.
-            // See if we can index as a property.
-            if (node.argumentExpression) {
-                var name_12 = getPropertyNameForIndexedAccess(node.argumentExpression, indexType);
-                if (name_12 !== undefined) {
-                    var prop = getPropertyOfType(objectType, name_12);
-                    if (prop) {
-                        getNodeLinks(node).resolvedSymbol = prop;
-                        return getTypeOfSymbol(prop);
-                    }
-                    else if (isConstEnum) {
-                        error(node.argumentExpression, ts.Diagnostics.Property_0_does_not_exist_on_const_enum_1, name_12, symbolToString(objectType.symbol));
-                        return unknownType;
-                    }
-                }
-            }
-            // Check for compatible indexer types.
-            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 258 /* StringLike */ | 132 /* NumberLike */ | 16777216 /* ESSymbol */)) {
-                // Try to use a number indexer.
-                if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 132 /* NumberLike */) || isForInVariableForNumericPropertyNames(node.argumentExpression)) {
-                    var numberIndexInfo = getIndexInfoOfType(objectType, 1 /* Number */);
-                    if (numberIndexInfo) {
-                        getNodeLinks(node).resolvedIndexInfo = numberIndexInfo;
-                        return numberIndexInfo.type;
-                    }
-                }
-                // Try to use string indexing.
-                var stringIndexInfo = getIndexInfoOfType(objectType, 0 /* String */);
-                if (stringIndexInfo) {
-                    getNodeLinks(node).resolvedIndexInfo = stringIndexInfo;
-                    return stringIndexInfo.type;
-                }
-                // Fall back to any.
-                if (compilerOptions.noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors && !isTypeAny(objectType)) {
-                    error(node, getIndexTypeOfType(objectType, 1 /* Number */) ?
-                        ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number :
-                        ts.Diagnostics.Index_signature_of_object_type_implicitly_has_an_any_type);
-                }
-                return anyType;
-            }
-            // REVIEW: Users should know the type that was actually used.
-            error(node, ts.Diagnostics.An_index_expression_argument_must_be_of_type_string_number_symbol_or_any);
-            return unknownType;
-        }
-        /**
-         * If indexArgumentExpression is a string literal or number literal, returns its text.
-         * If indexArgumentExpression is a constant value, returns its string value.
-         * If indexArgumentExpression is a well known symbol, returns the property name corresponding
-         *    to this symbol, as long as it is a proper symbol reference.
-         * Otherwise, returns undefined.
-         */
-        function getPropertyNameForIndexedAccess(indexArgumentExpression, indexArgumentType) {
-            if (indexArgumentExpression.kind === 9 /* StringLiteral */ || indexArgumentExpression.kind === 8 /* NumericLiteral */) {
-                return indexArgumentExpression.text;
-            }
-            if (indexArgumentExpression.kind === 173 /* ElementAccessExpression */ || indexArgumentExpression.kind === 172 /* PropertyAccessExpression */) {
-                var value = getConstantValue(indexArgumentExpression);
-                if (value !== undefined) {
-                    return value.toString();
-                }
-            }
-            if (checkThatExpressionIsProperSymbolReference(indexArgumentExpression, indexArgumentType, /*reportError*/ false)) {
-                var rightHandSideName = indexArgumentExpression.name.text;
-                return ts.getPropertyNameForKnownSymbolName(rightHandSideName);
-            }
-            return undefined;
-        }
-        /**
-         * A proper symbol reference requires the following:
-         *   1. The property access denotes a property that exists
-         *   2. The expression is of the form Symbol.<identifier>
-         *   3. The property access is of the primitive type symbol.
-         *   4. Symbol in this context resolves to the global Symbol object
-         */
-        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
-            if (expressionType === unknownType) {
-                // There is already an error, so no need to report one.
-                return false;
-            }
-            if (!ts.isWellKnownSymbolSyntactically(expression)) {
-                return false;
-            }
-            // Make sure the property type is the primitive symbol type
-            if ((expressionType.flags & 16777216 /* ESSymbol */) === 0) {
-                if (reportError) {
-                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
-                }
-                return false;
-            }
-            // The name is Symbol.<someName>, so make sure Symbol actually resolves to the
-            // global Symbol object
-            var leftHandSide = expression.expression;
-            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
-            if (!leftHandSideSymbol) {
-                return false;
-            }
-            var globalESSymbol = getGlobalESSymbolConstructorSymbol();
-            if (!globalESSymbol) {
-                // Already errored when we tried to look up the symbol
-                return false;
-            }
-            if (leftHandSideSymbol !== globalESSymbol) {
-                if (reportError) {
-                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
-                }
-                return false;
-            }
-            return true;
-        }
-        function resolveUntypedCall(node) {
-            if (node.kind === 176 /* TaggedTemplateExpression */) {
-                checkExpression(node.template);
-            }
-            else if (node.kind !== 143 /* Decorator */) {
-                ts.forEach(node.arguments, function (argument) {
-                    checkExpression(argument);
-                });
-            }
-            return anySignature;
-        }
-        function resolveErrorCall(node) {
-            resolveUntypedCall(node);
-            return unknownSignature;
-        }
-        // Re-order candidate signatures into the result array. Assumes the result array to be empty.
-        // The candidate list orders groups in reverse, but within a group signatures are kept in declaration order
-        // A nit here is that we reorder only signatures that belong to the same symbol,
-        // so order how inherited signatures are processed is still preserved.
-        // interface A { (x: string): void }
-        // interface B extends A { (x: 'foo'): string }
-        // const b: B;
-        // b('foo') // <- here overloads should be processed as [(x:'foo'): string, (x: string): void]
-        function reorderCandidates(signatures, result) {
-            var lastParent;
-            var lastSymbol;
-            var cutoffIndex = 0;
-            var index;
-            var specializedIndex = -1;
-            var spliceIndex;
-            ts.Debug.assert(!result.length);
-            for (var _i = 0, signatures_2 = signatures; _i < signatures_2.length; _i++) {
-                var signature = signatures_2[_i];
-                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
-                var parent_9 = signature.declaration && signature.declaration.parent;
-                if (!lastSymbol || symbol === lastSymbol) {
-                    if (lastParent && parent_9 === lastParent) {
-                        index++;
-                    }
-                    else {
-                        lastParent = parent_9;
-                        index = cutoffIndex;
-                    }
-                }
-                else {
-                    // current declaration belongs to a different symbol
-                    // set cutoffIndex so re-orderings in the future won't change result set from 0 to cutoffIndex
-                    index = cutoffIndex = result.length;
-                    lastParent = parent_9;
-                }
-                lastSymbol = symbol;
-                // specialized signatures always need to be placed before non-specialized signatures regardless
-                // of the cutoff position; see GH#1133
-                if (signature.hasStringLiterals) {
-                    specializedIndex++;
-                    spliceIndex = specializedIndex;
-                    // The cutoff index always needs to be greater than or equal to the specialized signature index
-                    // in order to prevent non-specialized signatures from being added before a specialized
-                    // signature.
-                    cutoffIndex++;
-                }
-                else {
-                    spliceIndex = index;
-                }
-                result.splice(spliceIndex, 0, signature);
-            }
-        }
-        function getSpreadArgumentIndex(args) {
-            for (var i = 0; i < args.length; i++) {
-                var arg = args[i];
-                if (arg && arg.kind === 191 /* SpreadElementExpression */) {
-                    return i;
-                }
-            }
-            return -1;
-        }
-        function hasCorrectArity(node, args, signature) {
-            var adjustedArgCount; // Apparent number of arguments we will have in this call
-            var typeArguments; // Type arguments (undefined if none)
-            var callIsIncomplete; // In incomplete call we want to be lenient when we have too few arguments
-            var isDecorator;
-            var spreadArgIndex = -1;
-            if (node.kind === 176 /* TaggedTemplateExpression */) {
-                var tagExpression = node;
-                // Even if the call is incomplete, we'll have a missing expression as our last argument,
-                // so we can say the count is just the arg list length
-                adjustedArgCount = args.length;
-                typeArguments = undefined;
-                if (tagExpression.template.kind === 189 /* TemplateExpression */) {
-                    // If a tagged template expression lacks a tail literal, the call is incomplete.
-                    // Specifically, a template only can end in a TemplateTail or a Missing literal.
-                    var templateExpression = tagExpression.template;
-                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
-                    ts.Debug.assert(lastSpan !== undefined); // we should always have at least one span.
-                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
-                }
-                else {
-                    // If the template didn't end in a backtick, or its beginning occurred right prior to EOF,
-                    // then this might actually turn out to be a TemplateHead in the future;
-                    // so we consider the call to be incomplete.
-                    var templateLiteral = tagExpression.template;
-                    ts.Debug.assert(templateLiteral.kind === 11 /* NoSubstitutionTemplateLiteral */);
-                    callIsIncomplete = !!templateLiteral.isUnterminated;
-                }
-            }
-            else if (node.kind === 143 /* Decorator */) {
-                isDecorator = true;
-                typeArguments = undefined;
-                adjustedArgCount = getEffectiveArgumentCount(node, /*args*/ undefined, signature);
-            }
-            else {
-                var callExpression = node;
-                if (!callExpression.arguments) {
-                    // This only happens when we have something of the form: 'new C'
-                    ts.Debug.assert(callExpression.kind === 175 /* NewExpression */);
-                    return signature.minArgumentCount === 0;
-                }
-                // For IDE scenarios we may have an incomplete call, so a trailing comma is tantamount to adding another argument.
-                adjustedArgCount = callExpression.arguments.hasTrailingComma ? args.length + 1 : args.length;
-                // If we are missing the close paren, the call is incomplete.
-                callIsIncomplete = callExpression.arguments.end === callExpression.end;
-                typeArguments = callExpression.typeArguments;
-                spreadArgIndex = getSpreadArgumentIndex(args);
-            }
-            // If the user supplied type arguments, but the number of type arguments does not match
-            // the declared number of type parameters, the call has an incorrect arity.
-            var hasRightNumberOfTypeArgs = !typeArguments ||
-                (signature.typeParameters && typeArguments.length === signature.typeParameters.length);
-            if (!hasRightNumberOfTypeArgs) {
-                return false;
-            }
-            // If spread arguments are present, check that they correspond to a rest parameter. If so, no
-            // further checking is necessary.
-            if (spreadArgIndex >= 0) {
-                return isRestParameterIndex(signature, spreadArgIndex);
-            }
-            // Too many arguments implies incorrect arity.
-            if (!signature.hasRestParameter && adjustedArgCount > signature.parameters.length) {
-                return false;
-            }
-            // If the call is incomplete, we should skip the lower bound check.
-            var hasEnoughArguments = adjustedArgCount >= signature.minArgumentCount;
-            return callIsIncomplete || hasEnoughArguments;
-        }
-        // If type has a single call signature and no other members, return that signature. Otherwise, return undefined.
-        function getSingleCallSignature(type) {
-            if (type.flags & 80896 /* ObjectType */) {
-                var resolved = resolveStructuredTypeMembers(type);
-                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
-                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
-                    return resolved.callSignatures[0];
-                }
-            }
-            return undefined;
-        }
-        // Instantiate a generic signature in the context of a non-generic signature (section 3.8.5 in TypeScript spec)
-        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
-            var context = createInferenceContext(signature.typeParameters, /*inferUnionTypes*/ true);
-            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
-                // Type parameters from outer context referenced by source type are fixed by instantiation of the source type
-                inferTypes(context, instantiateType(source, contextualMapper), target);
-            });
-            return getSignatureInstantiation(signature, getInferredTypes(context));
-        }
-        function inferTypeArguments(node, signature, args, excludeArgument, context) {
-            var typeParameters = signature.typeParameters;
-            var inferenceMapper = getInferenceMapper(context);
-            // Clear out all the inference results from the last time inferTypeArguments was called on this context
-            for (var i = 0; i < typeParameters.length; i++) {
-                // As an optimization, we don't have to clear (and later recompute) inferred types
-                // for type parameters that have already been fixed on the previous call to inferTypeArguments.
-                // It would be just as correct to reset all of them. But then we'd be repeating the same work
-                // for the type parameters that were fixed, namely the work done by getInferredType.
-                if (!context.inferences[i].isFixed) {
-                    context.inferredTypes[i] = undefined;
-                }
-            }
-            // On this call to inferTypeArguments, we may get more inferences for certain type parameters that were not
-            // fixed last time. This means that a type parameter that failed inference last time may succeed this time,
-            // or vice versa. Therefore, the failedTypeParameterIndex is useless if it points to an unfixed type parameter,
-            // because it may change. So here we reset it. However, getInferredType will not revisit any type parameters
-            // that were previously fixed. So if a fixed type parameter failed previously, it will fail again because
-            // it will contain the exact same set of inferences. So if we reset the index from a fixed type parameter,
-            // we will lose information that we won't recover this time around.
-            if (context.failedTypeParameterIndex !== undefined && !context.inferences[context.failedTypeParameterIndex].isFixed) {
-                context.failedTypeParameterIndex = undefined;
-            }
-            if (signature.thisType) {
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                inferTypes(context, thisArgumentType, signature.thisType);
-            }
-            // We perform two passes over the arguments. In the first pass we infer from all arguments, but use
-            // wildcards for all context sensitive function expressions.
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
-                if (arg === undefined || arg.kind !== 193 /* OmittedExpression */) {
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    // If the effective argument type is 'undefined', there is no synthetic type
-                    // for the argument. In that case, we should check the argument.
-                    if (argType === undefined) {
-                        // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
-                        // context sensitive function expressions as wildcards
-                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : inferenceMapper;
-                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
-                    }
-                    inferTypes(context, argType, paramType);
-                }
-            }
-            // In the second pass we visit only context sensitive arguments, and only those that aren't excluded, this
-            // time treating function expressions normally (which may cause previously inferred type arguments to be fixed
-            // as we construct types for contextually typed parameters)
-            // Decorators will not have `excludeArgument`, as their arguments cannot be contextually typed.
-            // Tagged template expressions will always have `undefined` for `excludeArgument[0]`.
-            if (excludeArgument) {
-                for (var i = 0; i < argCount; i++) {
-                    // No need to check for omitted args and template expressions, their exclusion value is always undefined
-                    if (excludeArgument[i] === false) {
-                        var arg = args[i];
-                        var paramType = getTypeAtPosition(signature, i);
-                        inferTypes(context, checkExpressionWithContextualType(arg, paramType, inferenceMapper), paramType);
-                    }
-                }
-            }
-            getInferredTypes(context);
-        }
-        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
-            var typeParameters = signature.typeParameters;
-            var typeArgumentsAreAssignable = true;
-            var mapper;
-            for (var i = 0; i < typeParameters.length; i++) {
-                if (typeArgumentsAreAssignable /* so far */) {
-                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                    if (constraint) {
-                        var errorInfo = void 0;
-                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
-                        if (reportErrors && headMessage) {
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
-                            typeArgumentHeadMessage = headMessage;
-                        }
-                        if (!mapper) {
-                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
-                        }
-                        var typeArgument = typeArgumentTypes[i];
-                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
-                    }
-                }
-            }
-            return typeArgumentsAreAssignable;
-        }
-        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
-            if (signature.thisType && signature.thisType !== voidType && node.kind !== 175 /* NewExpression */) {
-                // If the called expression is not of the form `x.f` or `x["f"]`, then sourceType = voidType
-                // If the signature's 'this' type is voidType, then the check is skipped -- anything is compatible.
-                // If the expression is a new expression, then the check is skipped.
-                var thisArgumentNode = getThisArgumentOfCall(node);
-                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
-                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
-                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
-                if (!checkTypeRelatedTo(thisArgumentType, signature.thisType, relation, errorNode, headMessage_1)) {
-                    return false;
-                }
-            }
-            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
-            var argCount = getEffectiveArgumentCount(node, args, signature);
-            for (var i = 0; i < argCount; i++) {
-                var arg = getEffectiveArgument(node, args, i);
-                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
-                if (arg === undefined || arg.kind !== 193 /* OmittedExpression */) {
-                    // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
-                    var paramType = getTypeAtPosition(signature, i);
-                    var argType = getEffectiveArgumentType(node, i, arg);
-                    // If the effective argument type is 'undefined', there is no synthetic type
-                    // for the argument. In that case, we should check the argument.
-                    if (argType === undefined) {
-                        argType = arg.kind === 9 /* StringLiteral */ && !reportErrors
-                            ? getStringLiteralTypeForText(arg.text)
-                            : checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
-                    }
-                    // Use argument expression as error location when reporting errors
-                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
-                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        /**
-         * Returns the this argument in calls like x.f(...) and x[f](...). Undefined otherwise.
-         */
-        function getThisArgumentOfCall(node) {
-            if (node.kind === 174 /* CallExpression */) {
-                var callee = node.expression;
-                if (callee.kind === 172 /* PropertyAccessExpression */) {
-                    return callee.expression;
-                }
-                else if (callee.kind === 173 /* ElementAccessExpression */) {
-                    return callee.expression;
-                }
-            }
-        }
-        /**
-         * Returns the effective arguments for an expression that works like a function invocation.
-         *
-         * If 'node' is a CallExpression or a NewExpression, then its argument list is returned.
-         * If 'node' is a TaggedTemplateExpression, a new argument list is constructed from the substitution
-         *    expressions, where the first element of the list is `undefined`.
-         * If 'node' is a Decorator, the argument list will be `undefined`, and its arguments and types
-         *    will be supplied from calls to `getEffectiveArgumentCount` and `getEffectiveArgumentType`.
-         */
-        function getEffectiveCallArguments(node) {
-            var args;
-            if (node.kind === 176 /* TaggedTemplateExpression */) {
-                var template = node.template;
-                args = [undefined];
-                if (template.kind === 189 /* TemplateExpression */) {
-                    ts.forEach(template.templateSpans, function (span) {
-                        args.push(span.expression);
-                    });
-                }
-            }
-            else if (node.kind === 143 /* Decorator */) {
-                // For a decorator, we return undefined as we will determine
-                // the number and types of arguments for a decorator using
-                // `getEffectiveArgumentCount` and `getEffectiveArgumentType` below.
-                return undefined;
-            }
-            else {
-                args = node.arguments || emptyArray;
-            }
-            return args;
-        }
-        /**
-          * Returns the effective argument count for a node that works like a function invocation.
-          * If 'node' is a Decorator, the number of arguments is derived from the decoration
-          *    target and the signature:
-          *    If 'node.target' is a class declaration or class expression, the effective argument
-          *       count is 1.
-          *    If 'node.target' is a parameter declaration, the effective argument count is 3.
-          *    If 'node.target' is a property declaration, the effective argument count is 2.
-          *    If 'node.target' is a method or accessor declaration, the effective argument count
-          *       is 3, although it can be 2 if the signature only accepts two arguments, allowing
-          *       us to match a property decorator.
-          * Otherwise, the argument count is the length of the 'args' array.
-          */
-        function getEffectiveArgumentCount(node, args, signature) {
-            if (node.kind === 143 /* Decorator */) {
-                switch (node.parent.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                        // A class decorator will have one argument (see `ClassDecorator` in core.d.ts)
-                        return 1;
-                    case 145 /* PropertyDeclaration */:
-                        // A property declaration decorator will have two arguments (see
-                        // `PropertyDecorator` in core.d.ts)
-                        return 2;
-                    case 147 /* MethodDeclaration */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        // A method or accessor declaration decorator will have two or three arguments (see
-                        // `PropertyDecorator` and `MethodDecorator` in core.d.ts)
-                        // If we are emitting decorators for ES3, we will only pass two arguments.
-                        if (languageVersion === 0 /* ES3 */) {
-                            return 2;
-                        }
-                        // If the method decorator signature only accepts a target and a key, we will only
-                        // type check those arguments.
-                        return signature.parameters.length >= 3 ? 3 : 2;
-                    case 142 /* Parameter */:
-                        // A parameter declaration decorator will have three arguments (see
-                        // `ParameterDecorator` in core.d.ts)
-                        return 3;
-                }
-            }
-            else {
-                return args.length;
-            }
-        }
-        /**
-          * Returns the effective type of the first argument to a decorator.
-          * If 'node' is a class declaration or class expression, the effective argument type
-          *    is the type of the static side of the class.
-          * If 'node' is a parameter declaration, the effective argument type is either the type
-          *    of the static or instance side of the class for the parameter's parent method,
-          *    depending on whether the method is declared static.
-          *    For a constructor, the type is always the type of the static side of the class.
-          * If 'node' is a property, method, or accessor declaration, the effective argument
-          *    type is the type of the static or instance side of the parent class for class
-          *    element, depending on whether the element is declared static.
-          */
-        function getEffectiveDecoratorFirstArgumentType(node) {
-            // The first argument to a decorator is its `target`.
-            if (node.kind === 221 /* ClassDeclaration */) {
-                // For a class decorator, the `target` is the type of the class (e.g. the
-                // "static" or "constructor" side of the class)
-                var classSymbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(classSymbol);
-            }
-            if (node.kind === 142 /* Parameter */) {
-                // For a parameter decorator, the `target` is the parent type of the
-                // parameter's containing method.
-                node = node.parent;
-                if (node.kind === 148 /* Constructor */) {
-                    var classSymbol = getSymbolOfNode(node);
-                    return getTypeOfSymbol(classSymbol);
-                }
-            }
-            if (node.kind === 145 /* PropertyDeclaration */ ||
-                node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // For a property or method decorator, the `target` is the
-                // "static"-side type of the parent of the member if the member is
-                // declared "static"; otherwise, it is the "instance"-side type of the
-                // parent of the member.
-                return getParentTypeOfClassElement(node);
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        /**
-          * Returns the effective type for the second argument to a decorator.
-          * If 'node' is a parameter, its effective argument type is one of the following:
-          *    If 'node.parent' is a constructor, the effective argument type is 'any', as we
-          *       will emit `undefined`.
-          *    If 'node.parent' is a member with an identifier, numeric, or string literal name,
-          *       the effective argument type will be a string literal type for the member name.
-          *    If 'node.parent' is a computed property name, the effective argument type will
-          *       either be a symbol type or the string type.
-          * If 'node' is a member with an identifier, numeric, or string literal name, the
-          *    effective argument type will be a string literal type for the member name.
-          * If 'node' is a computed property name, the effective argument type will either
-          *    be a symbol type or the string type.
-          * A class decorator does not have a second argument type.
-          */
-        function getEffectiveDecoratorSecondArgumentType(node) {
-            // The second argument to a decorator is its `propertyKey`
-            if (node.kind === 221 /* ClassDeclaration */) {
-                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 142 /* Parameter */) {
-                node = node.parent;
-                if (node.kind === 148 /* Constructor */) {
-                    // For a constructor parameter decorator, the `propertyKey` will be `undefined`.
-                    return anyType;
-                }
-            }
-            if (node.kind === 145 /* PropertyDeclaration */ ||
-                node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // The `propertyKey` for a property or method decorator will be a
-                // string literal type if the member name is an identifier, number, or string;
-                // otherwise, if the member name is a computed property name it will
-                // be either string or symbol.
-                var element = node;
-                switch (element.name.kind) {
-                    case 69 /* Identifier */:
-                    case 8 /* NumericLiteral */:
-                    case 9 /* StringLiteral */:
-                        return getStringLiteralTypeForText(element.name.text);
-                    case 140 /* ComputedPropertyName */:
-                        var nameType = checkComputedPropertyName(element.name);
-                        if (isTypeOfKind(nameType, 16777216 /* ESSymbol */)) {
-                            return nameType;
-                        }
-                        else {
-                            return stringType;
-                        }
-                    default:
-                        ts.Debug.fail("Unsupported property name.");
-                        return unknownType;
-                }
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        /**
-          * Returns the effective argument type for the third argument to a decorator.
-          * If 'node' is a parameter, the effective argument type is the number type.
-          * If 'node' is a method or accessor, the effective argument type is a
-          *    `TypedPropertyDescriptor<T>` instantiated with the type of the member.
-          * Class and property decorators do not have a third effective argument.
-          */
-        function getEffectiveDecoratorThirdArgumentType(node) {
-            // The third argument to a decorator is either its `descriptor` for a method decorator
-            // or its `parameterIndex` for a parameter decorator
-            if (node.kind === 221 /* ClassDeclaration */) {
-                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 142 /* Parameter */) {
-                // The `parameterIndex` for a parameter decorator is always a number
-                return numberType;
-            }
-            if (node.kind === 145 /* PropertyDeclaration */) {
-                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
-                return unknownType;
-            }
-            if (node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // The `descriptor` for a method decorator will be a `TypedPropertyDescriptor<T>`
-                // for the type of the member.
-                var propertyType = getTypeOfNode(node);
-                return createTypedPropertyDescriptorType(propertyType);
-            }
-            ts.Debug.fail("Unsupported decorator target.");
-            return unknownType;
-        }
-        /**
-          * Returns the effective argument type for the provided argument to a decorator.
-          */
-        function getEffectiveDecoratorArgumentType(node, argIndex) {
-            if (argIndex === 0) {
-                return getEffectiveDecoratorFirstArgumentType(node.parent);
-            }
-            else if (argIndex === 1) {
-                return getEffectiveDecoratorSecondArgumentType(node.parent);
-            }
-            else if (argIndex === 2) {
-                return getEffectiveDecoratorThirdArgumentType(node.parent);
-            }
-            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
-            return unknownType;
-        }
-        /**
-          * Gets the effective argument type for an argument in a call expression.
-          */
-        function getEffectiveArgumentType(node, argIndex, arg) {
-            // Decorators provide special arguments, a tagged template expression provides
-            // a special first argument, and string literals get string literal types
-            // unless we're reporting errors
-            if (node.kind === 143 /* Decorator */) {
-                return getEffectiveDecoratorArgumentType(node, argIndex);
-            }
-            else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) {
-                return getGlobalTemplateStringsArrayType();
-            }
-            // This is not a synthetic argument, so we return 'undefined'
-            // to signal that the caller needs to check the argument.
-            return undefined;
-        }
-        /**
-          * Gets the effective argument expression for an argument in a call expression.
-          */
-        function getEffectiveArgument(node, args, argIndex) {
-            // For a decorator or the first argument of a tagged template expression we return undefined.
-            if (node.kind === 143 /* Decorator */ ||
-                (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */)) {
-                return undefined;
-            }
-            return args[argIndex];
-        }
-        /**
-          * Gets the error node to use when reporting errors for an effective argument.
-          */
-        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
-            if (node.kind === 143 /* Decorator */) {
-                // For a decorator, we use the expression of the decorator for error reporting.
-                return node.expression;
-            }
-            else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) {
-                // For a the first argument of a tagged template expression, we use the template of the tag for error reporting.
-                return node.template;
-            }
-            else {
-                return arg;
-            }
-        }
-        function resolveCall(node, signatures, candidatesOutArray, headMessage) {
-            var isTaggedTemplate = node.kind === 176 /* TaggedTemplateExpression */;
-            var isDecorator = node.kind === 143 /* Decorator */;
-            var typeArguments;
-            if (!isTaggedTemplate && !isDecorator) {
-                typeArguments = node.typeArguments;
-                // We already perform checking on the type arguments on the class declaration itself.
-                if (node.expression.kind !== 95 /* SuperKeyword */) {
-                    ts.forEach(typeArguments, checkSourceElement);
-                }
-            }
-            var candidates = candidatesOutArray || [];
-            // reorderCandidates fills up the candidates array directly
-            reorderCandidates(signatures, candidates);
-            if (!candidates.length) {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
-                return resolveErrorCall(node);
-            }
-            var args = getEffectiveCallArguments(node);
-            // The following applies to any value of 'excludeArgument[i]':
-            //    - true:      the argument at 'i' is susceptible to a one-time permanent contextual typing.
-            //    - undefined: the argument at 'i' is *not* susceptible to permanent contextual typing.
-            //    - false:     the argument at 'i' *was* and *has been* permanently contextually typed.
-            //
-            // The idea is that we will perform type argument inference & assignability checking once
-            // without using the susceptible parameters that are functions, and once more for each of those
-            // parameters, contextually typing each as we go along.
-            //
-            // For a tagged template, then the first argument be 'undefined' if necessary
-            // because it represents a TemplateStringsArray.
-            //
-            // For a decorator, no arguments are susceptible to contextual typing due to the fact
-            // decorators are applied to a declaration by the emitter, and not to an expression.
-            var excludeArgument;
-            if (!isDecorator) {
-                // We do not need to call `getEffectiveArgumentCount` here as it only
-                // applies when calculating the number of arguments for a decorator.
-                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
-                    if (isContextSensitive(args[i])) {
-                        if (!excludeArgument) {
-                            excludeArgument = new Array(args.length);
-                        }
-                        excludeArgument[i] = true;
-                    }
-                }
-            }
-            // The following variables are captured and modified by calls to chooseOverload.
-            // If overload resolution or type argument inference fails, we want to report the
-            // best error possible. The best error is one which says that an argument was not
-            // assignable to a parameter. This implies that everything else about the overload
-            // was fine. So if there is any overload that is only incorrect because of an
-            // argument, we will report an error on that one.
-            //
-            //     function foo(s: string) {}
-            //     function foo(n: number) {} // Report argument error on this overload
-            //     function foo() {}
-            //     foo(true);
-            //
-            // If none of the overloads even made it that far, there are two possibilities.
-            // There was a problem with type arguments for some overload, in which case
-            // report an error on that. Or none of the overloads even had correct arity,
-            // in which case give an arity error.
-            //
-            //     function foo<T>(x: T, y: T) {} // Report type argument inference error
-            //     function foo() {}
-            //     foo(0, true);
-            //
-            var candidateForArgumentError;
-            var candidateForTypeArgumentError;
-            var resultOfFailedInference;
-            var result;
-            // Section 4.12.1:
-            // if the candidate list contains one or more signatures for which the type of each argument
-            // expression is a subtype of each corresponding parameter type, the return type of the first
-            // of those signatures becomes the return type of the function call.
-            // Otherwise, the return type of the first signature in the candidate list becomes the return
-            // type of the function call.
-            //
-            // Whether the call is an error is determined by assignability of the arguments. The subtype pass
-            // is just important for choosing the best signature. So in the case where there is only one
-            // signature, the subtype pass is useless. So skipping it is an optimization.
-            if (candidates.length > 1) {
-                result = chooseOverload(candidates, subtypeRelation);
-            }
-            if (!result) {
-                // Reinitialize these pointers for round two
-                candidateForArgumentError = undefined;
-                candidateForTypeArgumentError = undefined;
-                resultOfFailedInference = undefined;
-                result = chooseOverload(candidates, assignableRelation);
-            }
-            if (result) {
-                return result;
-            }
-            // No signatures were applicable. Now report errors based on the last applicable signature with
-            // no arguments excluded from assignability checks.
-            // If candidate is undefined, it means that no candidates had a suitable arity. In that case,
-            // skip the checkApplicableSignature check.
-            if (candidateForArgumentError) {
-                // excludeArgument is undefined, in this case also equivalent to [undefined, undefined, ...]
-                // The importance of excludeArgument is to prevent us from typing function expression parameters
-                // in arguments too early. If possible, we'd like to only type them once we know the correct
-                // overload. However, this matters for the case where the call is correct. When the call is
-                // an error, we don't need to exclude any arguments, although it would cause no harm to do so.
-                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, /*excludeArgument*/ undefined, /*reportErrors*/ true);
-            }
-            else if (candidateForTypeArgumentError) {
-                if (!isTaggedTemplate && !isDecorator && typeArguments) {
-                    var typeArguments_2 = node.typeArguments;
-                    checkTypeArguments(candidateForTypeArgumentError, typeArguments_2, ts.map(typeArguments_2, getTypeFromTypeNode), /*reportErrors*/ true, headMessage);
-                }
-                else {
-                    ts.Debug.assert(resultOfFailedInference.failedTypeParameterIndex >= 0);
-                    var failedTypeParameter = candidateForTypeArgumentError.typeParameters[resultOfFailedInference.failedTypeParameterIndex];
-                    var inferenceCandidates = getInferenceCandidates(resultOfFailedInference, resultOfFailedInference.failedTypeParameterIndex);
-                    var diagnosticChainHead = ts.chainDiagnosticMessages(/*details*/ undefined, // details will be provided by call to reportNoCommonSupertypeError
-                    ts.Diagnostics.The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly, typeToString(failedTypeParameter));
-                    if (headMessage) {
-                        diagnosticChainHead = ts.chainDiagnosticMessages(diagnosticChainHead, headMessage);
-                    }
-                    reportNoCommonSupertypeError(inferenceCandidates, node.expression || node.tag, diagnosticChainHead);
-                }
-            }
-            else {
-                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
-            }
-            // No signature was applicable. We have already reported the errors for the invalid signature.
-            // If this is a type resolution session, e.g. Language Service, try to get better information that anySignature.
-            // Pick the first candidate that matches the arity. This way we can get a contextual type for cases like:
-            //  declare function f(a: { xa: number; xb: number; });
-            //  f({ |
-            if (!produceDiagnostics) {
-                for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
-                    var candidate = candidates_1[_i];
-                    if (hasCorrectArity(node, args, candidate)) {
-                        if (candidate.typeParameters && typeArguments) {
-                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNode));
-                        }
-                        return candidate;
-                    }
-                }
-            }
-            return resolveErrorCall(node);
-            function reportError(message, arg0, arg1, arg2) {
-                var errorInfo;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
-                if (headMessage) {
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                }
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
-            }
-            function chooseOverload(candidates, relation) {
-                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
-                    var originalCandidate = candidates_2[_i];
-                    if (!hasCorrectArity(node, args, originalCandidate)) {
-                        continue;
-                    }
-                    var candidate = void 0;
-                    var typeArgumentsAreValid = void 0;
-                    var inferenceContext = originalCandidate.typeParameters
-                        ? createInferenceContext(originalCandidate.typeParameters, /*inferUnionTypes*/ false)
-                        : undefined;
-                    while (true) {
-                        candidate = originalCandidate;
-                        if (candidate.typeParameters) {
-                            var typeArgumentTypes = void 0;
-                            if (typeArguments) {
-                                typeArgumentTypes = ts.map(typeArguments, getTypeFromTypeNode);
-                                typeArgumentsAreValid = checkTypeArguments(candidate, typeArguments, typeArgumentTypes, /*reportErrors*/ false);
-                            }
-                            else {
-                                inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
-                                typeArgumentsAreValid = inferenceContext.failedTypeParameterIndex === undefined;
-                                typeArgumentTypes = inferenceContext.inferredTypes;
-                            }
-                            if (!typeArgumentsAreValid) {
-                                break;
-                            }
-                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
-                        }
-                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, /*reportErrors*/ false)) {
-                            break;
-                        }
-                        var index = excludeArgument ? ts.indexOf(excludeArgument, true) : -1;
-                        if (index < 0) {
-                            return candidate;
-                        }
-                        excludeArgument[index] = false;
-                    }
-                    // A post-mortem of this iteration of the loop. The signature was not applicable,
-                    // so we want to track it as a candidate for reporting an error. If the candidate
-                    // had no type parameters, or had no issues related to type arguments, we can
-                    // report an error based on the arguments. If there was an issue with type
-                    // arguments, then we can only report an error based on the type arguments.
-                    if (originalCandidate.typeParameters) {
-                        var instantiatedCandidate = candidate;
-                        if (typeArgumentsAreValid) {
-                            candidateForArgumentError = instantiatedCandidate;
-                        }
-                        else {
-                            candidateForTypeArgumentError = originalCandidate;
-                            if (!typeArguments) {
-                                resultOfFailedInference = inferenceContext;
-                            }
-                        }
-                    }
-                    else {
-                        ts.Debug.assert(originalCandidate === candidate);
-                        candidateForArgumentError = originalCandidate;
-                    }
-                }
-                return undefined;
-            }
-        }
-        function resolveCallExpression(node, candidatesOutArray) {
-            if (node.expression.kind === 95 /* SuperKeyword */) {
-                var superType = checkSuperExpression(node.expression);
-                if (superType !== unknownType) {
-                    // In super call, the candidate signatures are the matching arity signatures of the base constructor function instantiated
-                    // with the type arguments specified in the extends clause.
-                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
-                    if (baseTypeNode) {
-                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments);
-                        return resolveCall(node, baseConstructors, candidatesOutArray);
-                    }
-                }
-                return resolveUntypedCall(node);
-            }
-            var funcType = checkNonNullExpression(node.expression);
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                // Another error has already been reported
-                return resolveErrorCall(node);
-            }
-            // Technically, this signatures list may be incomplete. We are taking the apparent type,
-            // but we are not including call signatures that may have been added to the Object or
-            // Function interface, since they have none by default. This is a bit of a leap of faith
-            // that the user will not add any.
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
-            // TS 1.0 spec: 4.12
-            // If FuncExpr is of type Any, or of an object type that has no call or construct signatures
-            // but is a subtype of the Function interface, the call is an untyped function call. In an
-            // untyped function call no TypeArgs are permitted, Args can be any argument list, no contextual
-            // types are provided for the argument expressions, and the result is always of type Any.
-            // We exclude union types because we may have a union of function types that happen to have
-            // no common signatures.
-            if (isTypeAny(funcType) || (!callSignatures.length && !constructSignatures.length && !(funcType.flags & 16384 /* Union */) && isTypeAssignableTo(funcType, globalFunctionType))) {
-                // The unknownType indicates that an error already occurred (and was reported).  No
-                // need to report another error in this case.
-                if (funcType !== unknownType && node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
-                }
-                return resolveUntypedCall(node);
-            }
-            // If FuncExpr's apparent type(section 3.8.1) is a function type, the call is a typed function call.
-            // TypeScript employs overload resolution in typed function calls in order to support functions
-            // with multiple call signatures.
-            if (!callSignatures.length) {
-                if (constructSignatures.length) {
-                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
-                }
-                else {
-                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                }
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        function resolveNewExpression(node, candidatesOutArray) {
-            if (node.arguments && languageVersion < 1 /* ES5 */) {
-                var spreadIndex = getSpreadArgumentIndex(node.arguments);
-                if (spreadIndex >= 0) {
-                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
-                }
-            }
-            var expressionType = checkNonNullExpression(node.expression);
-            // If expressionType's apparent type(section 3.8.1) is an object type with one or
-            // more construct signatures, the expression is processed in the same manner as a
-            // function call, but using the construct signatures as the initial set of candidate
-            // signatures for overload resolution. The result type of the function call becomes
-            // the result type of the operation.
-            expressionType = getApparentType(expressionType);
-            if (expressionType === unknownType) {
-                // Another error has already been reported
-                return resolveErrorCall(node);
-            }
-            // If the expression is a class of abstract type, then it cannot be instantiated.
-            // Note, only class declarations can be declared abstract.
-            // In the case of a merged class-module or class-interface declaration,
-            // only the class declaration node will have the Abstract flag set.
-            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
-            if (valueDecl && valueDecl.flags & 128 /* Abstract */) {
-                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
-                return resolveErrorCall(node);
-            }
-            // TS 1.0 spec: 4.11
-            // If expressionType is of type Any, Args can be any argument
-            // list and the result of the operation is of type Any.
-            if (isTypeAny(expressionType)) {
-                if (node.typeArguments) {
-                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
-                }
-                return resolveUntypedCall(node);
-            }
-            // Technically, this signatures list may be incomplete. We are taking the apparent type,
-            // but we are not including construct signatures that may have been added to the Object or
-            // Function interface, since they have none by default. This is a bit of a leap of faith
-            // that the user will not add any.
-            var constructSignatures = getSignaturesOfType(expressionType, 1 /* Construct */);
-            if (constructSignatures.length) {
-                if (!isConstructorAccessible(node, constructSignatures[0])) {
-                    return resolveErrorCall(node);
-                }
-                return resolveCall(node, constructSignatures, candidatesOutArray);
-            }
-            // If expressionType's apparent type is an object type with no construct signatures but
-            // one or more call signatures, the expression is processed as a function call. A compile-time
-            // error occurs if the result of the function call is not Void. The type of the result of the
-            // operation is Any. It is an error to have a Void this type.
-            var callSignatures = getSignaturesOfType(expressionType, 0 /* Call */);
-            if (callSignatures.length) {
-                var signature = resolveCall(node, callSignatures, candidatesOutArray);
-                if (getReturnTypeOfSignature(signature) !== voidType) {
-                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
-                }
-                if (signature.thisType === voidType) {
-                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
-                }
-                return signature;
-            }
-            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
-            return resolveErrorCall(node);
-        }
-        function isConstructorAccessible(node, signature) {
-            if (!signature || !signature.declaration) {
-                return true;
-            }
-            var declaration = signature.declaration;
-            var flags = declaration.flags;
-            // Public constructor is accessible.
-            if (!(flags & (8 /* Private */ | 16 /* Protected */))) {
-                return true;
-            }
-            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
-            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
-            // A private or protected constructor can only be instantiated within it's own class 
-            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
-                if (flags & 8 /* Private */) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
-                if (flags & 16 /* Protected */) {
-                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
-                }
-                return false;
-            }
-            return true;
-        }
-        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
-            var tagType = checkExpression(node.tag);
-            var apparentType = getApparentType(tagType);
-            if (apparentType === unknownType) {
-                // Another error has already been reported
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            if (isTypeAny(tagType) || (!callSignatures.length && !(tagType.flags & 16384 /* Union */) && isTypeAssignableTo(tagType, globalFunctionType))) {
-                return resolveUntypedCall(node);
-            }
-            if (!callSignatures.length) {
-                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray);
-        }
-        /**
-          * Gets the localized diagnostic head message to use for errors when resolving a decorator as a call expression.
-          */
-        function getDiagnosticHeadMessageForDecoratorResolution(node) {
-            switch (node.parent.kind) {
-                case 221 /* ClassDeclaration */:
-                case 192 /* ClassExpression */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
-                case 142 /* Parameter */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
-                case 145 /* PropertyDeclaration */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
-                case 147 /* MethodDeclaration */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
-            }
-        }
-        /**
-          * Resolves a decorator as if it were a call expression.
-          */
-        function resolveDecorator(node, candidatesOutArray) {
-            var funcType = checkExpression(node.expression);
-            var apparentType = getApparentType(funcType);
-            if (apparentType === unknownType) {
-                return resolveErrorCall(node);
-            }
-            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
-            if (funcType === anyType || (!callSignatures.length && !(funcType.flags & 16384 /* Union */) && isTypeAssignableTo(funcType, globalFunctionType))) {
-                return resolveUntypedCall(node);
-            }
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            if (!callSignatures.length) {
-                var errorInfo = void 0;
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
-                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
-                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
-                return resolveErrorCall(node);
-            }
-            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
-        }
-        function resolveSignature(node, candidatesOutArray) {
-            switch (node.kind) {
-                case 174 /* CallExpression */:
-                    return resolveCallExpression(node, candidatesOutArray);
-                case 175 /* NewExpression */:
-                    return resolveNewExpression(node, candidatesOutArray);
-                case 176 /* TaggedTemplateExpression */:
-                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
-                case 143 /* Decorator */:
-                    return resolveDecorator(node, candidatesOutArray);
-            }
-            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
-        }
-        // candidatesOutArray is passed by signature help in the language service, and collectCandidates
-        // must fill it up with the appropriate candidate signatures
-        function getResolvedSignature(node, candidatesOutArray) {
-            var links = getNodeLinks(node);
-            // If getResolvedSignature has already been called, we will have cached the resolvedSignature.
-            // However, it is possible that either candidatesOutArray was not passed in the first time,
-            // or that a different candidatesOutArray was passed in. Therefore, we need to redo the work
-            // to correctly fill the candidatesOutArray.
-            var cached = links.resolvedSignature;
-            if (cached && cached !== anySignature && !candidatesOutArray) {
-                return cached;
-            }
-            links.resolvedSignature = anySignature;
-            var result = resolveSignature(node, candidatesOutArray);
-            // If signature resolution originated in control flow type analysis (for example to compute the
-            // assigned type in a flow assignment) we don't cache the result as it may be based on temporary
-            // types from the control flow analysis.
-            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
-            return result;
-        }
-        function getResolvedOrAnySignature(node) {
-            // If we're already in the process of resolving the given signature, don't resolve again as
-            // that could cause infinite recursion. Instead, return anySignature.
-            return getNodeLinks(node).resolvedSignature === anySignature ? anySignature : getResolvedSignature(node);
-        }
-        function getInferredClassType(symbol) {
-            var links = getSymbolLinks(symbol);
-            if (!links.inferredClassType) {
-                links.inferredClassType = createAnonymousType(undefined, symbol.members, emptyArray, emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
-            }
-            return links.inferredClassType;
-        }
-        /**
-         * Syntactically and semantically checks a call or new expression.
-         * @param node The call/new expression to be checked.
-         * @returns On success, the expression's signature's return type. On failure, anyType.
-         */
-        function checkCallExpression(node) {
-            // Grammar checking; stop grammar-checking if checkGrammarTypeArguments return true
-            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
-            var signature = getResolvedSignature(node);
-            if (node.expression.kind === 95 /* SuperKeyword */) {
-                return voidType;
-            }
-            if (node.kind === 175 /* NewExpression */) {
-                var declaration = signature.declaration;
-                if (declaration &&
-                    declaration.kind !== 148 /* Constructor */ &&
-                    declaration.kind !== 152 /* ConstructSignature */ &&
-                    declaration.kind !== 157 /* ConstructorType */ &&
-                    !ts.isJSDocConstructSignature(declaration)) {
-                    // When resolved signature is a call signature (and not a construct signature) the result type is any, unless
-                    // the declaring function had members created through 'x.prototype.y = expr' or 'this.y = expr' psuedodeclarations
-                    // in a JS file
-                    var funcSymbol = checkExpression(node.expression).symbol;
-                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16 /* Function */)) {
-                        return getInferredClassType(funcSymbol);
-                    }
-                    else if (compilerOptions.noImplicitAny) {
-                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
-                    }
-                    return anyType;
-                }
-            }
-            // In JavaScript files, calls to any identifier 'require' are treated as external module imports
-            if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
-                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
-            }
-            return getReturnTypeOfSignature(signature);
-        }
-        function checkTaggedTemplateExpression(node) {
-            return getReturnTypeOfSignature(getResolvedSignature(node));
-        }
-        function checkAssertion(node) {
-            var exprType = getRegularTypeOfObjectLiteral(checkExpression(node.expression));
-            var targetType = getTypeFromTypeNode(node.type);
-            if (produceDiagnostics && targetType !== unknownType) {
-                var widenedType = getWidenedType(exprType);
-                if (!isTypeComparableTo(targetType, widenedType)) {
-                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
-                }
-            }
-            return targetType;
-        }
-        function checkNonNullAssertion(node) {
-            return getNonNullableType(checkExpression(node.expression));
-        }
-        function getTypeOfParameter(symbol) {
-            var type = getTypeOfSymbol(symbol);
-            if (strictNullChecks) {
-                var declaration = symbol.valueDeclaration;
-                if (declaration && declaration.initializer) {
-                    return addNullableKind(type, 32 /* Undefined */);
-                }
-            }
-            return type;
-        }
-        function getTypeAtPosition(signature, pos) {
-            return signature.hasRestParameter ?
-                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
-                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
-        }
-        function assignContextualParameterTypes(signature, context, mapper) {
-            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
-            for (var i = 0; i < len; i++) {
-                var parameter = signature.parameters[i];
-                var contextualParameterType = getTypeAtPosition(context, i);
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
-            }
-            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
-                var parameter = ts.lastOrUndefined(signature.parameters);
-                var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
-                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
-            }
-        }
-        // When contextual typing assigns a type to a parameter that contains a binding pattern, we also need to push
-        // the destructured type into the contained binding elements.
-        function assignBindingElementTypes(node) {
-            if (ts.isBindingPattern(node.name)) {
-                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (element.kind !== 193 /* OmittedExpression */) {
-                        if (element.name.kind === 69 /* Identifier */) {
-                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
-                        }
-                        assignBindingElementTypes(element);
-                    }
-                }
-            }
-        }
-        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType, mapper) {
-            var links = getSymbolLinks(parameter);
-            if (!links.type) {
-                links.type = instantiateType(contextualType, mapper);
-                // if inference didn't come up with anything but {}, fall back to the binding pattern if present.
-                if (links.type === emptyObjectType &&
-                    (parameter.valueDeclaration.name.kind === 167 /* ObjectBindingPattern */ ||
-                        parameter.valueDeclaration.name.kind === 168 /* ArrayBindingPattern */)) {
-                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
-                }
-                assignBindingElementTypes(parameter.valueDeclaration);
-            }
-            else if (isInferentialContext(mapper)) {
-                // Even if the parameter already has a type, it might be because it was given a type while
-                // processing the function as an argument to a prior signature during overload resolution.
-                // If this was the case, it may have caused some type parameters to be fixed. So here,
-                // we need to ensure that type parameters at the same positions get fixed again. This is
-                // done by calling instantiateType to attach the mapper to the contextualType, and then
-                // calling inferTypes to force a walk of contextualType so that all the correct fixing
-                // happens. The choice to pass in links.type may seem kind of arbitrary, but it serves
-                // to make sure that all the correct positions in contextualType are reached by the walk.
-                // Here is an example:
-                //
-                //      interface Base {
-                //          baseProp;
-                //      }
-                //      interface Derived extends Base {
-                //          toBase(): Base;
-                //      }
-                //
-                //      var derived: Derived;
-                //
-                //      declare function foo<T>(x: T, func: (p: T) => T): T;
-                //      declare function foo<T>(x: T, func: (p: T) => T): T;
-                //
-                //      var result = foo(derived, d => d.toBase());
-                //
-                // We are typing d while checking the second overload. But we've already given d
-                // a type (Derived) from the first overload. However, we still want to fix the
-                // T in the second overload so that we do not infer Base as a candidate for T
-                // (inferring Base would make type argument inference inconsistent between the two
-                // overloads).
-                inferTypes(mapper.context, links.type, instantiateType(contextualType, mapper));
-            }
-        }
-        function getReturnTypeFromJSDocComment(func) {
-            var returnTag = ts.getJSDocReturnTag(func);
-            if (returnTag && returnTag.typeExpression) {
-                return getTypeFromTypeNode(returnTag.typeExpression.type);
-            }
-            return undefined;
-        }
-        function createPromiseType(promisedType) {
-            // creates a `Promise<T>` type where `T` is the promisedType argument
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType !== emptyGenericType) {
-                // if the promised type is itself a promise, get the underlying type; otherwise, fallback to the promised type
-                promisedType = getAwaitedType(promisedType);
-                return createTypeReference(globalPromiseType, [promisedType]);
-            }
-            return emptyObjectType;
-        }
-        function getReturnTypeFromBody(func, contextualMapper) {
-            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
-            if (!func.body) {
-                return unknownType;
-            }
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var type;
-            if (func.body.kind !== 199 /* Block */) {
-                type = checkExpressionCached(func.body, contextualMapper);
-                if (isAsync) {
-                    // From within an async function you can return either a non-promise value or a promise. Any
-                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-                    // return type of the body should be unwrapped to its awaited type, which we will wrap in
-                    // the native Promise<T> type later in this function.
-                    type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                }
-            }
-            else {
-                var types = void 0;
-                var funcIsGenerator = !!func.asteriskToken;
-                if (funcIsGenerator) {
-                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
-                    if (types.length === 0) {
-                        var iterableIteratorAny = createIterableIteratorType(anyType);
-                        if (compilerOptions.noImplicitAny) {
-                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
-                        }
-                        return iterableIteratorAny;
-                    }
-                }
-                else {
-                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
-                    if (!types) {
-                        return neverType;
-                    }
-                    if (types.length === 0) {
-                        if (isAsync) {
-                            // For an async function, the return type will not be void, but rather a Promise for void.
-                            var promiseType = createPromiseType(voidType);
-                            if (promiseType === emptyObjectType) {
-                                error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-                                return unknownType;
-                            }
-                            return promiseType;
-                        }
-                        return voidType;
-                    }
-                }
-                // When yield/return statements are contextually typed we allow the return type to be a union type.
-                // Otherwise we require the yield/return expressions to have a best common supertype.
-                type = contextualSignature ? getUnionType(types) : getCommonSupertype(types);
-                if (!type) {
-                    if (funcIsGenerator) {
-                        error(func, ts.Diagnostics.No_best_common_type_exists_among_yield_expressions);
-                        return createIterableIteratorType(unknownType);
-                    }
-                    else {
-                        error(func, ts.Diagnostics.No_best_common_type_exists_among_return_expressions);
-                        // Defer to unioning the return types so we get a) downstream errors earlier and b) better Salsa experience
-                        return getUnionType(types);
-                    }
-                }
-                if (funcIsGenerator) {
-                    type = createIterableIteratorType(type);
-                }
-            }
-            if (!contextualSignature) {
-                reportErrorsFromWidening(func, type);
-            }
-            var widenedType = getWidenedType(type);
-            if (isAsync) {
-                // From within an async function you can return either a non-promise value or a promise. Any
-                // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-                // return type of the body is awaited type of the body, wrapped in a native Promise<T> type.
-                var promiseType = createPromiseType(widenedType);
-                if (promiseType === emptyObjectType) {
-                    error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-                    return unknownType;
-                }
-                return promiseType;
-            }
-            else {
-                return widenedType;
-            }
-        }
-        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
-            var aggregatedTypes = [];
-            ts.forEachYieldExpression(func.body, function (yieldExpression) {
-                var expr = yieldExpression.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (yieldExpression.asteriskToken) {
-                        // A yield* expression effectively yields everything that its operand yields
-                        type = checkElementTypeOfIterable(type, yieldExpression.expression);
-                    }
-                    if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
-                    }
-                }
-            });
-            return aggregatedTypes;
-        }
-        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
-            var isAsync = ts.isAsyncFunctionLike(func);
-            var aggregatedTypes = [];
-            var hasReturnWithNoExpression = !!(func.flags & 32768 /* HasImplicitReturn */);
-            var hasReturnOfTypeNever = false;
-            ts.forEachReturnStatement(func.body, function (returnStatement) {
-                var expr = returnStatement.expression;
-                if (expr) {
-                    var type = checkExpressionCached(expr, contextualMapper);
-                    if (isAsync) {
-                        // From within an async function you can return either a non-promise value or a promise. Any
-                        // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
-                        // return type of the body should be unwrapped to its awaited type, which should be wrapped in
-                        // the native Promise<T> type by the caller.
-                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                    }
-                    if (type === neverType) {
-                        hasReturnOfTypeNever = true;
-                    }
-                    else if (!ts.contains(aggregatedTypes, type)) {
-                        aggregatedTypes.push(type);
-                    }
-                }
-                else {
-                    hasReturnWithNoExpression = true;
-                }
-            });
-            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
-                func.kind === 179 /* FunctionExpression */ || func.kind === 180 /* ArrowFunction */)) {
-                return undefined;
-            }
-            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
-                if (!ts.contains(aggregatedTypes, undefinedType)) {
-                    aggregatedTypes.push(undefinedType);
-                }
-            }
-            return aggregatedTypes;
-        }
-        /**
-         * TypeScript Specification 1.0 (6.3) - July 2014
-         *   An explicitly typed function whose return type isn't the Void type,
-         *   the Any type, or a union type containing the Void or Any type as a constituent
-         *   must have at least one return statement somewhere in its body.
-         *   An exception to this rule is if the function implementation consists of a single 'throw' statement.
-         *
-         * @param returnType - return type of the function, can be undefined if return type is not explicitly specified
-         */
-        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            // Functions with with an explicitly specified 'void' or 'any' return type don't need any return expressions.
-            if (returnType && maybeTypeOfKind(returnType, 1 /* Any */ | 16 /* Void */)) {
-                return;
-            }
-            // If all we have is a function signature, or an arrow function with an expression body, then there is nothing to check.
-            // also if HasImplicitReturn flag is not set this means that all codepaths in function body end with return or throw
-            if (ts.nodeIsMissing(func.body) || func.body.kind !== 199 /* Block */ || !(func.flags & 32768 /* HasImplicitReturn */)) {
-                return;
-            }
-            var hasExplicitReturn = func.flags & 65536 /* HasExplicitReturn */;
-            if (returnType === neverType) {
-                error(func.type, ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
-            }
-            else if (returnType && !hasExplicitReturn) {
-                // minimal check: function has syntactic return type annotation and no explicit return statements in the body
-                // this function does not conform to the specification.
-                // NOTE: having returnType !== undefined is a precondition for entering this branch so func.type will always be present
-                error(func.type, ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
-            }
-            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
-                error(func.type, ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
-            }
-            else if (compilerOptions.noImplicitReturns) {
-                if (!returnType) {
-                    // If return type annotation is omitted check if function has any explicit return statements.
-                    // If it does not have any - its inferred return type is void - don't do any checks.
-                    // Otherwise get inferred return type from function body and report error only if it is not void / anytype
-                    if (!hasExplicitReturn) {
-                        return;
-                    }
-                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
-                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
-                        return;
-                    }
-                }
-                error(func.type || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
-            }
-        }
-        function checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            // Grammar checking
-            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
-            if (!hasGrammarError && node.kind === 179 /* FunctionExpression */) {
-                checkGrammarForGenerator(node);
-            }
-            // The identityMapper object is used to indicate that function expressions are wildcards
-            if (contextualMapper === identityMapper && isContextSensitive(node)) {
-                checkNodeDeferred(node);
-                return anyFunctionType;
-            }
-            var links = getNodeLinks(node);
-            var type = getTypeOfSymbol(node.symbol);
-            var contextSensitive = isContextSensitive(node);
-            var mightFixTypeParameters = contextSensitive && isInferentialContext(contextualMapper);
-            // Check if function expression is contextually typed and assign parameter types if so.
-            // See the comment in assignTypeToParameterAndFixTypeParameters to understand why we need to
-            // check mightFixTypeParameters.
-            if (mightFixTypeParameters || !(links.flags & 1024 /* ContextChecked */)) {
-                var contextualSignature = getContextualSignature(node);
-                // If a type check is started at a function expression that is an argument of a function call, obtaining the
-                // contextual type may recursively get back to here during overload resolution of the call. If so, we will have
-                // already assigned contextual types.
-                var contextChecked = !!(links.flags & 1024 /* ContextChecked */);
-                if (mightFixTypeParameters || !contextChecked) {
-                    links.flags |= 1024 /* ContextChecked */;
-                    if (contextualSignature) {
-                        var signature = getSignaturesOfType(type, 0 /* Call */)[0];
-                        if (contextSensitive) {
-                            assignContextualParameterTypes(signature, contextualSignature, contextualMapper || identityMapper);
-                        }
-                        if (mightFixTypeParameters || !node.type && !signature.resolvedReturnType) {
-                            var returnType = getReturnTypeFromBody(node, contextualMapper);
-                            if (!signature.resolvedReturnType) {
-                                signature.resolvedReturnType = returnType;
-                            }
-                        }
-                    }
-                    if (!contextChecked) {
-                        checkSignatureDeclaration(node);
-                        checkNodeDeferred(node);
-                    }
-                }
-            }
-            if (produceDiagnostics && node.kind !== 147 /* MethodDeclaration */ && node.kind !== 146 /* MethodSignature */) {
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-            }
-            return type;
-        }
-        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
-            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
-            var isAsync = ts.isAsyncFunctionLike(node);
-            var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-            if (!node.asteriskToken) {
-                // return is not necessary in the body of generators
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (node.body) {
-                if (!node.type) {
-                    // There are some checks that are only performed in getReturnTypeFromBody, that may produce errors
-                    // we need. An example is the noImplicitAny errors resulting from widening the return expression
-                    // of a function. Because checking of function expression bodies is deferred, there was never an
-                    // appropriate time to do this during the main walk of the file (see the comment at the top of
-                    // checkFunctionExpressionBodies). So it must be done now.
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
-                }
-                if (node.body.kind === 199 /* Block */) {
-                    checkSourceElement(node.body);
-                }
-                else {
-                    // From within an async function you can return either a non-promise value or a promise. Any
-                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so we
-                    // should not be checking assignability of a promise to the return type. Instead, we need to
-                    // check assignability of the awaited type of the expression body against the promised type of
-                    // its return type annotation.
-                    var exprType = checkExpression(node.body);
-                    if (returnOrPromisedType) {
-                        if (isAsync) {
-                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member);
-                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
-                        }
-                    }
-                }
-            }
-        }
-        function checkArithmeticOperandType(operand, type, diagnostic) {
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 132 /* NumberLike */)) {
-                error(operand, diagnostic);
-                return false;
-            }
-            return true;
-        }
-        function isReadonlySymbol(symbol) {
-            // The following symbols are considered read-only:
-            // Properties with a 'readonly' modifier
-            // Variables declared with 'const'
-            // Get accessors without matching set accessors
-            // Enum members
-            return symbol.flags & 4 /* Property */ && (getDeclarationFlagsFromSymbol(symbol) & 64 /* Readonly */) !== 0 ||
-                symbol.flags & 3 /* Variable */ && (getDeclarationFlagsFromSymbol(symbol) & 2048 /* Const */) !== 0 ||
-                symbol.flags & 98304 /* Accessor */ && !(symbol.flags & 65536 /* SetAccessor */) ||
-                (symbol.flags & 8 /* EnumMember */) !== 0;
-        }
-        function isReferenceToReadonlyEntity(expr, symbol) {
-            if (isReadonlySymbol(symbol)) {
-                // Allow assignments to readonly properties within constructors of the same class declaration.
-                if (symbol.flags & 4 /* Property */ &&
-                    (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) &&
-                    expr.expression.kind === 97 /* ThisKeyword */) {
-                    // Look for if this is the constructor for the class that `symbol` is a property of.
-                    var func = ts.getContainingFunction(expr);
-                    if (!(func && func.kind === 148 /* Constructor */))
-                        return true;
-                    // If func.parent is a class and symbol is a (readonly) property of that class, or
-                    // if func is a constructor and symbol is a (readonly) parameter property declared in it,
-                    // then symbol is writeable here.
-                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
-                }
-                return true;
-            }
-            return false;
-        }
-        function isReferenceThroughNamespaceImport(expr) {
-            if (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) {
-                var node = skipParenthesizedNodes(expr.expression);
-                if (node.kind === 69 /* Identifier */) {
-                    var symbol = getNodeLinks(node).resolvedSymbol;
-                    if (symbol.flags & 8388608 /* Alias */) {
-                        var declaration = getDeclarationOfAliasSymbol(symbol);
-                        return declaration && declaration.kind === 232 /* NamespaceImport */;
-                    }
-                }
-            }
-            return false;
-        }
-        function checkReferenceExpression(expr, invalidReferenceMessage, constantVariableMessage) {
-            // References are combinations of identifiers, parentheses, and property accesses.
-            var node = skipParenthesizedNodes(expr);
-            if (node.kind !== 69 /* Identifier */ && node.kind !== 172 /* PropertyAccessExpression */ && node.kind !== 173 /* ElementAccessExpression */) {
-                error(expr, invalidReferenceMessage);
-                return false;
-            }
-            // Because we get the symbol from the resolvedSymbol property, it might be of kind
-            // SymbolFlags.ExportValue. In this case it is necessary to get the actual export
-            // symbol, which will have the correct flags set on it.
-            var links = getNodeLinks(node);
-            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
-            if (symbol) {
-                if (symbol !== unknownSymbol && symbol !== argumentsSymbol) {
-                    // Only variables (and not functions, classes, namespaces, enum objects, or enum members)
-                    // are considered references when referenced using a simple identifier.
-                    if (node.kind === 69 /* Identifier */ && !(symbol.flags & 3 /* Variable */)) {
-                        error(expr, invalidReferenceMessage);
-                        return false;
-                    }
-                    if (isReferenceToReadonlyEntity(node, symbol) || isReferenceThroughNamespaceImport(node)) {
-                        error(expr, constantVariableMessage);
-                        return false;
-                    }
-                }
-            }
-            else if (node.kind === 173 /* ElementAccessExpression */) {
-                if (links.resolvedIndexInfo && links.resolvedIndexInfo.isReadonly) {
-                    error(expr, constantVariableMessage);
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkDeleteExpression(node) {
-            checkExpression(node.expression);
-            return booleanType;
-        }
-        function checkTypeOfExpression(node) {
-            checkExpression(node.expression);
-            return stringType;
-        }
-        function checkVoidExpression(node) {
-            checkExpression(node.expression);
-            return undefinedType;
-        }
-        function checkAwaitExpression(node) {
-            // Grammar checking
-            if (produceDiagnostics) {
-                if (!(node.flags & 33554432 /* AwaitContext */)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
-                }
-            }
-            var operandType = checkExpression(node.expression);
-            return checkAwaitedType(operandType, node);
-        }
-        function checkPrefixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            switch (node.operator) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                    if (maybeTypeOfKind(operandType, 16777216 /* ESSymbol */)) {
-                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
-                    }
-                    return numberType;
-                case 49 /* ExclamationToken */:
-                    return booleanType;
-                case 41 /* PlusPlusToken */:
-                case 42 /* MinusMinusToken */:
-                    var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-                    if (ok) {
-                        // run check only if former checks succeeded to avoid reporting cascading errors
-                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
-                    }
-                    return numberType;
-            }
-            return unknownType;
-        }
-        function checkPostfixUnaryExpression(node) {
-            var operandType = checkExpression(node.operand);
-            var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
-            if (ok) {
-                // run check only if former checks succeeded to avoid reporting cascading errors
-                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
-            }
-            return numberType;
-        }
-        // Return true if type might be of the given kind. A union or intersection type might be of a given
-        // kind if at least one constituent type is of the given kind.
-        function maybeTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 49152 /* UnionOrIntersection */) {
-                var types = type.types;
-                for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
-                    var t = types_10[_i];
-                    if (maybeTypeOfKind(t, kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        // Return true if type is of the given kind. A union type is of a given kind if all constituent types
-        // are of the given kind. An intersection type is of a given kind if at least one constituent type is
-        // of the given kind.
-        function isTypeOfKind(type, kind) {
-            if (type.flags & kind) {
-                return true;
-            }
-            if (type.flags & 16384 /* Union */) {
-                var types = type.types;
-                for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
-                    var t = types_11[_i];
-                    if (!isTypeOfKind(t, kind)) {
-                        return false;
-                    }
-                }
-                return true;
-            }
-            if (type.flags & 32768 /* Intersection */) {
-                var types = type.types;
-                for (var _a = 0, types_12 = types; _a < types_12.length; _a++) {
-                    var t = types_12[_a];
-                    if (isTypeOfKind(t, kind)) {
-                        return true;
-                    }
-                }
-            }
-            return false;
-        }
-        function isConstEnumObjectType(type) {
-            return type.flags & (80896 /* ObjectType */ | 65536 /* Anonymous */) && type.symbol && isConstEnumSymbol(type.symbol);
-        }
-        function isConstEnumSymbol(symbol) {
-            return (symbol.flags & 128 /* ConstEnum */) !== 0;
-        }
-        function checkInstanceOfExpression(left, right, leftType, rightType) {
-            // TypeScript 1.0 spec (April 2014): 4.15.4
-            // The instanceof operator requires the left operand to be of type Any, an object type, or a type parameter type,
-            // and the right operand to be of type Any or a subtype of the 'Function' interface type.
-            // The result is always of the Boolean primitive type.
-            // NOTE: do not raise error if leftType is unknown as related error was already reported
-            if (isTypeOfKind(leftType, 16777726 /* Primitive */)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            // NOTE: do not raise error if right is unknown as related error was already reported
-            if (!(isTypeAny(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
-            }
-            return booleanType;
-        }
-        function checkInExpression(left, right, leftType, rightType) {
-            // TypeScript 1.0 spec (April 2014): 4.15.5
-            // The in operator requires the left operand to be of type Any, the String primitive type, or the Number primitive type,
-            // and the right operand to be of type Any, an object type, or a type parameter type.
-            // The result is always of the Boolean primitive type.
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 /* StringLike */ | 132 /* NumberLike */ | 16777216 /* ESSymbol */)) {
-                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
-            }
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 /* ObjectType */ | 512 /* TypeParameter */)) {
-                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            return booleanType;
-        }
-        function checkObjectLiteralAssignment(node, sourceType, contextualMapper) {
-            var properties = node.properties;
-            for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
-                var p = properties_3[_i];
-                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, contextualMapper);
-            }
-            return sourceType;
-        }
-        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, contextualMapper) {
-            if (property.kind === 253 /* PropertyAssignment */ || property.kind === 254 /* ShorthandPropertyAssignment */) {
-                var name_13 = property.name;
-                if (name_13.kind === 140 /* ComputedPropertyName */) {
-                    checkComputedPropertyName(name_13);
-                }
-                if (isComputedNonLiteralName(name_13)) {
-                    return undefined;
-                }
-                var text = getTextOfPropertyName(name_13);
-                var type = isTypeAny(objectLiteralType)
-                    ? objectLiteralType
-                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
-                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1 /* Number */) ||
-                        getIndexTypeOfType(objectLiteralType, 0 /* String */);
-                if (type) {
-                    if (property.kind === 254 /* ShorthandPropertyAssignment */) {
-                        return checkDestructuringAssignment(property, type);
-                    }
-                    else {
-                        // non-shorthand property assignments should always have initializers
-                        return checkDestructuringAssignment(property.initializer, type);
-                    }
-                }
-                else {
-                    error(name_13, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_13));
-                }
-            }
-            else {
-                error(property, ts.Diagnostics.Property_assignment_expected);
-            }
-        }
-        function checkArrayLiteralAssignment(node, sourceType, contextualMapper) {
-            // This elementType will be used if the specific property corresponding to this index is not
-            // present (aka the tuple element property). This call also checks that the parentType is in
-            // fact an iterable or array (depending on target language).
-            var elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false) || unknownType;
-            var elements = node.elements;
-            for (var i = 0; i < elements.length; i++) {
-                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, contextualMapper);
-            }
-            return sourceType;
-        }
-        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, contextualMapper) {
-            var elements = node.elements;
-            var element = elements[elementIndex];
-            if (element.kind !== 193 /* OmittedExpression */) {
-                if (element.kind !== 191 /* SpreadElementExpression */) {
-                    var propName = "" + elementIndex;
-                    var type = isTypeAny(sourceType)
-                        ? sourceType
-                        : isTupleLikeType(sourceType)
-                            ? getTypeOfPropertyOfType(sourceType, propName)
-                            : elementType;
-                    if (type) {
-                        return checkDestructuringAssignment(element, type, contextualMapper);
-                    }
-                    else {
-                        if (isTupleType(sourceType)) {
-                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), sourceType.elementTypes.length, elements.length);
-                        }
-                        else {
-                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
-                        }
-                    }
-                }
-                else {
-                    if (elementIndex < elements.length - 1) {
-                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
-                    }
-                    else {
-                        var restExpression = element.expression;
-                        if (restExpression.kind === 187 /* BinaryExpression */ && restExpression.operatorToken.kind === 56 /* EqualsToken */) {
-                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
-                        }
-                        else {
-                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), contextualMapper);
-                        }
-                    }
-                }
-            }
-            return undefined;
-        }
-        function checkDestructuringAssignment(exprOrAssignment, sourceType, contextualMapper) {
-            var target;
-            if (exprOrAssignment.kind === 254 /* ShorthandPropertyAssignment */) {
-                var prop = exprOrAssignment;
-                if (prop.objectAssignmentInitializer) {
-                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, contextualMapper);
-                }
-                target = exprOrAssignment.name;
-            }
-            else {
-                target = exprOrAssignment;
-            }
-            if (target.kind === 187 /* BinaryExpression */ && target.operatorToken.kind === 56 /* EqualsToken */) {
-                checkBinaryExpression(target, contextualMapper);
-                target = target.left;
-            }
-            if (target.kind === 171 /* ObjectLiteralExpression */) {
-                return checkObjectLiteralAssignment(target, sourceType, contextualMapper);
-            }
-            if (target.kind === 170 /* ArrayLiteralExpression */) {
-                return checkArrayLiteralAssignment(target, sourceType, contextualMapper);
-            }
-            return checkReferenceAssignment(target, sourceType, contextualMapper);
-        }
-        function checkReferenceAssignment(target, sourceType, contextualMapper) {
-            var targetType = checkExpression(target, contextualMapper);
-            if (checkReferenceExpression(target, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property)) {
-                checkTypeAssignableTo(sourceType, targetType, target, /*headMessage*/ undefined);
-            }
-            return sourceType;
-        }
-        function isTypeEqualityComparableTo(source, target) {
-            return (target.flags & 96 /* Nullable */) !== 0 || isTypeComparableTo(source, target);
-        }
-        function checkBinaryExpression(node, contextualMapper) {
-            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, contextualMapper, node);
-        }
-        function checkBinaryLikeExpression(left, operatorToken, right, contextualMapper, errorNode) {
-            var operator = operatorToken.kind;
-            if (operator === 56 /* EqualsToken */ && (left.kind === 171 /* ObjectLiteralExpression */ || left.kind === 170 /* ArrayLiteralExpression */)) {
-                return checkDestructuringAssignment(left, checkExpression(right, contextualMapper), contextualMapper);
-            }
-            var leftType = checkExpression(left, contextualMapper);
-            var rightType = checkExpression(right, contextualMapper);
-            switch (operator) {
-                case 37 /* AsteriskToken */:
-                case 38 /* AsteriskAsteriskToken */:
-                case 59 /* AsteriskEqualsToken */:
-                case 60 /* AsteriskAsteriskEqualsToken */:
-                case 39 /* SlashToken */:
-                case 61 /* SlashEqualsToken */:
-                case 40 /* PercentToken */:
-                case 62 /* PercentEqualsToken */:
-                case 36 /* MinusToken */:
-                case 58 /* MinusEqualsToken */:
-                case 43 /* LessThanLessThanToken */:
-                case 63 /* LessThanLessThanEqualsToken */:
-                case 44 /* GreaterThanGreaterThanToken */:
-                case 64 /* GreaterThanGreaterThanEqualsToken */:
-                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                case 47 /* BarToken */:
-                case 67 /* BarEqualsToken */:
-                case 48 /* CaretToken */:
-                case 68 /* CaretEqualsToken */:
-                case 46 /* AmpersandToken */:
-                case 66 /* AmpersandEqualsToken */:
-                    // TypeScript 1.0 spec (April 2014): 4.19.1
-                    // These operators require their operands to be of type Any, the Number primitive type,
-                    // or an enum type. Operands of an enum type are treated
-                    // as having the primitive type Number. If one operand is the null or undefined value,
-                    // it is treated as having the type of the other operand.
-                    // The result is always of the Number primitive type.
-                    if (leftType.flags & 96 /* Nullable */)
-                        leftType = rightType;
-                    if (rightType.flags & 96 /* Nullable */)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var suggestedOperator = void 0;
-                    // if a user tries to apply a bitwise operator to 2 boolean operands
-                    // try and return them a helpful suggestion
-                    if ((leftType.flags & 8 /* Boolean */) &&
-                        (rightType.flags & 8 /* Boolean */) &&
-                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
-                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
-                    }
-                    else {
-                        // otherwise just check each operand separately and report errors as normal
-                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
-                        if (leftOk && rightOk) {
-                            checkAssignmentOperator(numberType);
-                        }
-                    }
-                    return numberType;
-                case 35 /* PlusToken */:
-                case 57 /* PlusEqualsToken */:
-                    // TypeScript 1.0 spec (April 2014): 4.19.2
-                    // The binary + operator requires both operands to be of the Number primitive type or an enum type,
-                    // or at least one of the operands to be of type Any or the String primitive type.
-                    // If one operand is the null or undefined value, it is treated as having the type of the other operand.
-                    if (leftType.flags & 96 /* Nullable */)
-                        leftType = rightType;
-                    if (rightType.flags & 96 /* Nullable */)
-                        rightType = leftType;
-                    leftType = getNonNullableType(leftType);
-                    rightType = getNonNullableType(rightType);
-                    var resultType = void 0;
-                    if (isTypeOfKind(leftType, 132 /* NumberLike */) && isTypeOfKind(rightType, 132 /* NumberLike */)) {
-                        // Operands of an enum type are treated as having the primitive type Number.
-                        // If both operands are of the Number primitive type, the result is of the Number primitive type.
-                        resultType = numberType;
-                    }
-                    else {
-                        if (isTypeOfKind(leftType, 258 /* StringLike */) || isTypeOfKind(rightType, 258 /* StringLike */)) {
-                            // If one or both operands are of the String primitive type, the result is of the String primitive type.
-                            resultType = stringType;
-                        }
-                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
-                            // Otherwise, the result is of type Any.
-                            // NOTE: unknown type here denotes error type. Old compiler treated this case as any type so do we.
-                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
-                        }
-                        // Symbols are not allowed at all in arithmetic expressions
-                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
-                            return resultType;
-                        }
-                    }
-                    if (!resultType) {
-                        reportOperatorError();
-                        return anyType;
-                    }
-                    if (operator === 57 /* PlusEqualsToken */) {
-                        checkAssignmentOperator(resultType);
-                    }
-                    return resultType;
-                case 25 /* LessThanToken */:
-                case 27 /* GreaterThanToken */:
-                case 28 /* LessThanEqualsToken */:
-                case 29 /* GreaterThanEqualsToken */:
-                    if (checkForDisallowedESSymbolOperand(operator)) {
-                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
-                            reportOperatorError();
-                        }
-                    }
-                    return booleanType;
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
-                        reportOperatorError();
-                    }
-                    return booleanType;
-                case 91 /* InstanceOfKeyword */:
-                    return checkInstanceOfExpression(left, right, leftType, rightType);
-                case 90 /* InKeyword */:
-                    return checkInExpression(left, right, leftType, rightType);
-                case 51 /* AmpersandAmpersandToken */:
-                    return addNullableKind(rightType, getNullableKind(leftType));
-                case 52 /* BarBarToken */:
-                    return getUnionType([getNonNullableType(leftType), rightType]);
-                case 56 /* EqualsToken */:
-                    checkAssignmentOperator(rightType);
-                    return getRegularTypeOfObjectLiteral(rightType);
-                case 24 /* CommaToken */:
-                    return rightType;
-            }
-            // Return true if there was no error, false if there was an error.
-            function checkForDisallowedESSymbolOperand(operator) {
-                var offendingSymbolOperand = maybeTypeOfKind(leftType, 16777216 /* ESSymbol */) ? left :
-                    maybeTypeOfKind(rightType, 16777216 /* ESSymbol */) ? right :
-                        undefined;
-                if (offendingSymbolOperand) {
-                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
-                    return false;
-                }
-                return true;
-            }
-            function getSuggestedBooleanOperator(operator) {
-                switch (operator) {
-                    case 47 /* BarToken */:
-                    case 67 /* BarEqualsToken */:
-                        return 52 /* BarBarToken */;
-                    case 48 /* CaretToken */:
-                    case 68 /* CaretEqualsToken */:
-                        return 33 /* ExclamationEqualsEqualsToken */;
-                    case 46 /* AmpersandToken */:
-                    case 66 /* AmpersandEqualsToken */:
-                        return 51 /* AmpersandAmpersandToken */;
-                    default:
-                        return undefined;
-                }
-            }
-            function checkAssignmentOperator(valueType) {
-                if (produceDiagnostics && operator >= 56 /* FirstAssignment */ && operator <= 68 /* LastAssignment */) {
-                    // TypeScript 1.0 spec (April 2014): 4.17
-                    // An assignment of the form
-                    //    VarExpr = ValueExpr
-                    // requires VarExpr to be classified as a reference
-                    // A compound assignment furthermore requires VarExpr to be classified as a reference (section 4.1)
-                    // and the type of the non - compound operation to be assignable to the type of VarExpr.
-                    var ok = checkReferenceExpression(left, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property);
-                    // Use default messages
-                    if (ok) {
-                        // to avoid cascading errors check assignability only if 'isReference' check succeeded and no errors were reported
-                        checkTypeAssignableTo(valueType, leftType, left, /*headMessage*/ undefined);
-                    }
-                }
-            }
-            function reportOperatorError() {
-                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
-            }
-        }
-        function isYieldExpressionInClass(node) {
-            var current = node;
-            var parent = node.parent;
-            while (parent) {
-                if (ts.isFunctionLike(parent) && current === parent.body) {
-                    return false;
-                }
-                else if (ts.isClassLike(current)) {
-                    return true;
-                }
-                current = parent;
-                parent = parent.parent;
-            }
-            return false;
-        }
-        function checkYieldExpression(node) {
-            // Grammar checking
-            if (produceDiagnostics) {
-                if (!(node.flags & 8388608 /* YieldContext */) || isYieldExpressionInClass(node)) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
-                }
-                if (isInParameterInitializerBeforeContainingFunction(node)) {
-                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
-                }
-            }
-            if (node.expression) {
-                var func = ts.getContainingFunction(node);
-                // If the user's code is syntactically correct, the func should always have a star. After all,
-                // we are in a yield context.
-                if (func && func.asteriskToken) {
-                    var expressionType = checkExpressionCached(node.expression, /*contextualMapper*/ undefined);
-                    var expressionElementType = void 0;
-                    var nodeIsYieldStar = !!node.asteriskToken;
-                    if (nodeIsYieldStar) {
-                        expressionElementType = checkElementTypeOfIterable(expressionType, node.expression);
-                    }
-                    // There is no point in doing an assignability check if the function
-                    // has no explicit return type because the return type is directly computed
-                    // from the yield expressions.
-                    if (func.type) {
-                        var signatureElementType = getElementTypeOfIterableIterator(getTypeFromTypeNode(func.type)) || anyType;
-                        if (nodeIsYieldStar) {
-                            checkTypeAssignableTo(expressionElementType, signatureElementType, node.expression, /*headMessage*/ undefined);
-                        }
-                        else {
-                            checkTypeAssignableTo(expressionType, signatureElementType, node.expression, /*headMessage*/ undefined);
-                        }
-                    }
-                }
-            }
-            // Both yield and yield* expressions have type 'any'
-            return anyType;
-        }
-        function checkConditionalExpression(node, contextualMapper) {
-            checkExpression(node.condition);
-            var type1 = checkExpression(node.whenTrue, contextualMapper);
-            var type2 = checkExpression(node.whenFalse, contextualMapper);
-            return getUnionType([type1, type2]);
-        }
-        function checkStringLiteralExpression(node) {
-            var contextualType = getContextualType(node);
-            if (contextualType && contextualTypeIsStringLiteralType(contextualType)) {
-                return getStringLiteralTypeForText(node.text);
-            }
-            return stringType;
-        }
-        function checkTemplateExpression(node) {
-            // We just want to check each expressions, but we are unconcerned with
-            // the type of each expression, as any value may be coerced into a string.
-            // It is worth asking whether this is what we really want though.
-            // A place where we actually *are* concerned with the expressions' types are
-            // in tagged templates.
-            ts.forEach(node.templateSpans, function (templateSpan) {
-                checkExpression(templateSpan.expression);
-            });
-            return stringType;
-        }
-        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
-            var saveContextualType = node.contextualType;
-            node.contextualType = contextualType;
-            var result = checkExpression(node, contextualMapper);
-            node.contextualType = saveContextualType;
-            return result;
-        }
-        function checkExpressionCached(node, contextualMapper) {
-            var links = getNodeLinks(node);
-            if (!links.resolvedType) {
-                // When computing a type that we're going to cache, we need to ignore any ongoing control flow
-                // analysis because variables may have transient types in indeterminable states. Moving flowLoopStart
-                // to the top of the stack ensures all transient types are computed from a known point.
-                var saveFlowLoopStart = flowLoopStart;
-                flowLoopStart = flowLoopCount;
-                links.resolvedType = checkExpression(node, contextualMapper);
-                flowLoopStart = saveFlowLoopStart;
-            }
-            return links.resolvedType;
-        }
-        function checkPropertyAssignment(node, contextualMapper) {
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 140 /* ComputedPropertyName */) {
-                checkComputedPropertyName(node.name);
-            }
-            return checkExpression(node.initializer, contextualMapper);
-        }
-        function checkObjectLiteralMethod(node, contextualMapper) {
-            // Grammar checking
-            checkGrammarMethod(node);
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 140 /* ComputedPropertyName */) {
-                checkComputedPropertyName(node.name);
-            }
-            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
-        }
-        function instantiateTypeWithSingleGenericCallSignature(node, type, contextualMapper) {
-            if (isInferentialContext(contextualMapper)) {
-                var signature = getSingleCallSignature(type);
-                if (signature && signature.typeParameters) {
-                    var contextualType = getApparentTypeOfContextualType(node);
-                    if (contextualType) {
-                        var contextualSignature = getSingleCallSignature(contextualType);
-                        if (contextualSignature && !contextualSignature.typeParameters) {
-                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper));
-                        }
-                    }
-                }
-            }
-            return type;
-        }
-        // Checks an expression and returns its type. The contextualMapper parameter serves two purposes: When
-        // contextualMapper is not undefined and not equal to the identityMapper function object it indicates that the
-        // expression is being inferentially typed (section 4.15.2 in spec) and provides the type mapper to use in
-        // conjunction with the generic contextual type. When contextualMapper is equal to the identityMapper function
-        // object, it serves as an indicator that all contained function and arrow expressions should be considered to
-        // have the wildcard function type; this form of type check is used during overload resolution to exclude
-        // contextually typed function and arrow expressions in the initial phase.
-        function checkExpression(node, contextualMapper) {
-            var type;
-            if (node.kind === 139 /* QualifiedName */) {
-                type = checkQualifiedName(node);
-            }
-            else {
-                var uninstantiatedType = checkExpressionWorker(node, contextualMapper);
-                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
-            }
-            if (isConstEnumObjectType(type)) {
-                // enum object type for const enums are only permitted in:
-                // - 'left' in property access
-                // - 'object' in indexed access
-                // - target in rhs of import statement
-                var ok = (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.expression === node) ||
-                    (node.parent.kind === 173 /* ElementAccessExpression */ && node.parent.expression === node) ||
-                    ((node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */) && isInRightSideOfImportOrExportAssignment(node));
-                if (!ok) {
-                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
-                }
-            }
-            return type;
-        }
-        function checkNumericLiteral(node) {
-            // Grammar checking
-            checkGrammarNumericLiteral(node);
-            return numberType;
-        }
-        function checkExpressionWorker(node, contextualMapper) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                    return checkIdentifier(node);
-                case 97 /* ThisKeyword */:
-                    return checkThisExpression(node);
-                case 95 /* SuperKeyword */:
-                    return checkSuperExpression(node);
-                case 93 /* NullKeyword */:
-                    return nullType;
-                case 99 /* TrueKeyword */:
-                case 84 /* FalseKeyword */:
-                    return booleanType;
-                case 8 /* NumericLiteral */:
-                    return checkNumericLiteral(node);
-                case 189 /* TemplateExpression */:
-                    return checkTemplateExpression(node);
-                case 9 /* StringLiteral */:
-                    return checkStringLiteralExpression(node);
-                case 11 /* NoSubstitutionTemplateLiteral */:
-                    return stringType;
-                case 10 /* RegularExpressionLiteral */:
-                    return globalRegExpType;
-                case 170 /* ArrayLiteralExpression */:
-                    return checkArrayLiteral(node, contextualMapper);
-                case 171 /* ObjectLiteralExpression */:
-                    return checkObjectLiteral(node, contextualMapper);
-                case 172 /* PropertyAccessExpression */:
-                    return checkPropertyAccessExpression(node);
-                case 173 /* ElementAccessExpression */:
-                    return checkIndexedAccess(node);
-                case 174 /* CallExpression */:
-                case 175 /* NewExpression */:
-                    return checkCallExpression(node);
-                case 176 /* TaggedTemplateExpression */:
-                    return checkTaggedTemplateExpression(node);
-                case 178 /* ParenthesizedExpression */:
-                    return checkExpression(node.expression, contextualMapper);
-                case 192 /* ClassExpression */:
-                    return checkClassExpression(node);
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
-                case 182 /* TypeOfExpression */:
-                    return checkTypeOfExpression(node);
-                case 177 /* TypeAssertionExpression */:
-                case 195 /* AsExpression */:
-                    return checkAssertion(node);
-                case 196 /* NonNullExpression */:
-                    return checkNonNullAssertion(node);
-                case 181 /* DeleteExpression */:
-                    return checkDeleteExpression(node);
-                case 183 /* VoidExpression */:
-                    return checkVoidExpression(node);
-                case 184 /* AwaitExpression */:
-                    return checkAwaitExpression(node);
-                case 185 /* PrefixUnaryExpression */:
-                    return checkPrefixUnaryExpression(node);
-                case 186 /* PostfixUnaryExpression */:
-                    return checkPostfixUnaryExpression(node);
-                case 187 /* BinaryExpression */:
-                    return checkBinaryExpression(node, contextualMapper);
-                case 188 /* ConditionalExpression */:
-                    return checkConditionalExpression(node, contextualMapper);
-                case 191 /* SpreadElementExpression */:
-                    return checkSpreadElementExpression(node, contextualMapper);
-                case 193 /* OmittedExpression */:
-                    return undefinedType;
-                case 190 /* YieldExpression */:
-                    return checkYieldExpression(node);
-                case 248 /* JsxExpression */:
-                    return checkJsxExpression(node);
-                case 241 /* JsxElement */:
-                    return checkJsxElement(node);
-                case 242 /* JsxSelfClosingElement */:
-                    return checkJsxSelfClosingElement(node);
-                case 243 /* JsxOpeningElement */:
-                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
-            }
-            return unknownType;
-        }
-        // DECLARATION AND STATEMENT TYPE CHECKING
-        function checkTypeParameter(node) {
-            // Grammar Checking
-            if (node.expression) {
-                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
-            }
-            checkSourceElement(node.constraint);
-            getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node)));
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
-            }
-        }
-        function checkParameter(node) {
-            // Grammar checking
-            // It is a SyntaxError if the Identifier "eval" or the Identifier "arguments" occurs as the
-            // Identifier in a PropertySetParameterList of a PropertyAssignment that is contained in strict code
-            // or if its FunctionBody is strict code(11.1.5).
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkVariableLikeDeclaration(node);
-            var func = ts.getContainingFunction(node);
-            if (node.flags & 92 /* ParameterPropertyModifier */) {
-                func = ts.getContainingFunction(node);
-                if (!(func.kind === 148 /* Constructor */ && ts.nodeIsPresent(func.body))) {
-                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
-                }
-            }
-            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
-                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
-            }
-            if (node.name.text === "this") {
-                if (ts.indexOf(func.parameters, node) !== 0) {
-                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
-                }
-                if (func.kind === 148 /* Constructor */ || func.kind === 152 /* ConstructSignature */ || func.kind === 157 /* ConstructorType */) {
-                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
-                }
-            }
-            // Only check rest parameter type if it's not a binding pattern. Since binding patterns are
-            // not allowed in a rest parameter, we already have an error from checkGrammarParameterList.
-            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
-                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
-            }
-        }
-        function isSyntacticallyValidGenerator(node) {
-            if (!node.asteriskToken || !node.body) {
-                return false;
-            }
-            return node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 220 /* FunctionDeclaration */ ||
-                node.kind === 179 /* FunctionExpression */;
-        }
-        function getTypePredicateParameterIndex(parameterList, parameter) {
-            if (parameterList) {
-                for (var i = 0; i < parameterList.length; i++) {
-                    var param = parameterList[i];
-                    if (param.name.kind === 69 /* Identifier */ &&
-                        param.name.text === parameter.text) {
-                        return i;
-                    }
-                }
-            }
-            return -1;
-        }
-        function checkTypePredicate(node) {
-            var parent = getTypePredicateParent(node);
-            if (!parent) {
-                // The parent must not be valid.
-                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
-                return;
-            }
-            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
-            if (!typePredicate) {
-                return;
-            }
-            var parameterName = node.parameterName;
-            if (ts.isThisTypePredicate(typePredicate)) {
-                getTypeFromThisTypeNode(parameterName);
-            }
-            else {
-                if (typePredicate.parameterIndex >= 0) {
-                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
-                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
-                    }
-                    else {
-                        var leadingError = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
-                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, 
-                        /*headMessage*/ undefined, leadingError);
-                    }
-                }
-                else if (parameterName) {
-                    var hasReportedError = false;
-                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
-                        var name_14 = _a[_i].name;
-                        if (ts.isBindingPattern(name_14) &&
-                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_14, parameterName, typePredicate.parameterName)) {
-                            hasReportedError = true;
-                            break;
-                        }
-                    }
-                    if (!hasReportedError) {
-                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
-                    }
-                }
-            }
-        }
-        function getTypePredicateParent(node) {
-            switch (node.parent.kind) {
-                case 180 /* ArrowFunction */:
-                case 151 /* CallSignature */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 156 /* FunctionType */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    var parent_10 = node.parent;
-                    if (node === parent_10.type) {
-                        return parent_10;
-                    }
-            }
-        }
-        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
-            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
-                var name_15 = _a[_i].name;
-                if (name_15.kind === 69 /* Identifier */ &&
-                    name_15.text === predicateVariableName) {
-                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
-                    return true;
-                }
-                else if (name_15.kind === 168 /* ArrayBindingPattern */ ||
-                    name_15.kind === 167 /* ObjectBindingPattern */) {
-                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_15, predicateVariableNode, predicateVariableName)) {
-                        return true;
-                    }
-                }
-            }
-        }
-        function checkSignatureDeclaration(node) {
-            // Grammar checking
-            if (node.kind === 153 /* IndexSignature */) {
-                checkGrammarIndexSignature(node);
-            }
-            else if (node.kind === 156 /* FunctionType */ || node.kind === 220 /* FunctionDeclaration */ || node.kind === 157 /* ConstructorType */ ||
-                node.kind === 151 /* CallSignature */ || node.kind === 148 /* Constructor */ ||
-                node.kind === 152 /* ConstructSignature */) {
-                checkGrammarFunctionLikeDeclaration(node);
-            }
-            checkTypeParameters(node.typeParameters);
-            ts.forEach(node.parameters, checkParameter);
-            if (node.type) {
-                checkSourceElement(node.type);
-            }
-            if (produceDiagnostics) {
-                checkCollisionWithArgumentsInGeneratedCode(node);
-                if (compilerOptions.noImplicitAny && !node.type) {
-                    switch (node.kind) {
-                        case 152 /* ConstructSignature */:
-                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
-                        case 151 /* CallSignature */:
-                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
-                            break;
-                    }
-                }
-                if (node.type) {
-                    if (languageVersion >= 2 /* ES6 */ && isSyntacticallyValidGenerator(node)) {
-                        var returnType = getTypeFromTypeNode(node.type);
-                        if (returnType === voidType) {
-                            error(node.type, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
-                        }
-                        else {
-                            var generatorElementType = getElementTypeOfIterableIterator(returnType) || anyType;
-                            var iterableIteratorInstantiation = createIterableIteratorType(generatorElementType);
-                            // Naively, one could check that IterableIterator<any> is assignable to the return type annotation.
-                            // However, that would not catch the error in the following case.
-                            //
-                            //    interface BadGenerator extends Iterable<number>, Iterator<string> { }
-                            //    function* g(): BadGenerator { } // Iterable and Iterator have different types!
-                            //
-                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, node.type);
-                        }
-                    }
-                    else if (ts.isAsyncFunctionLike(node)) {
-                        checkAsyncFunctionReturnType(node);
-                    }
-                }
-            }
-        }
-        function checkClassForDuplicateDeclarations(node) {
-            var getter = 1, setter = 2, property = getter | setter;
-            var instanceNames = {};
-            var staticNames = {};
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind === 148 /* Constructor */) {
-                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
-                        var param = _c[_b];
-                        if (ts.isParameterPropertyDeclaration(param)) {
-                            addName(instanceNames, param.name, param.name.text, property);
-                        }
-                    }
-                }
-                else {
-                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113 /* StaticKeyword */; });
-                    var names = static ? staticNames : instanceNames;
-                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
-                    if (memberName) {
-                        switch (member.kind) {
-                            case 149 /* GetAccessor */:
-                                addName(names, member.name, memberName, getter);
-                                break;
-                            case 150 /* SetAccessor */:
-                                addName(names, member.name, memberName, setter);
-                                break;
-                            case 145 /* PropertyDeclaration */:
-                                addName(names, member.name, memberName, property);
-                                break;
-                        }
-                    }
-                }
-            }
-            function addName(names, location, name, meaning) {
-                if (ts.hasProperty(names, name)) {
-                    var prev = names[name];
-                    if (prev & meaning) {
-                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
-                    }
-                    else {
-                        names[name] = prev | meaning;
-                    }
-                }
-                else {
-                    names[name] = meaning;
-                }
-            }
-        }
-        function checkObjectTypeForDuplicateDeclarations(node) {
-            var names = {};
-            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                var member = _a[_i];
-                if (member.kind == 144 /* PropertySignature */) {
-                    var memberName = void 0;
-                    switch (member.name.kind) {
-                        case 9 /* StringLiteral */:
-                        case 8 /* NumericLiteral */:
-                        case 69 /* Identifier */:
-                            memberName = member.name.text;
-                            break;
-                        default:
-                            continue;
-                    }
-                    if (ts.hasProperty(names, memberName)) {
-                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
-                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
-                    }
-                    else {
-                        names[memberName] = true;
-                    }
-                }
-            }
-        }
-        function checkTypeForDuplicateIndexSignatures(node) {
-            if (node.kind === 222 /* InterfaceDeclaration */) {
-                var nodeSymbol = getSymbolOfNode(node);
-                // in case of merging interface declaration it is possible that we'll enter this check procedure several times for every declaration
-                // to prevent this run check only for the first declaration of a given kind
-                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
-                    return;
-                }
-            }
-            // TypeScript 1.0 spec (April 2014)
-            // 3.7.4: An object type can contain at most one string index signature and one numeric index signature.
-            // 8.5: A class declaration can have at most one string index member declaration and one numeric index member declaration
-            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
-            if (indexSymbol) {
-                var seenNumericIndexer = false;
-                var seenStringIndexer = false;
-                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var declaration = decl;
-                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
-                        switch (declaration.parameters[0].type.kind) {
-                            case 132 /* StringKeyword */:
-                                if (!seenStringIndexer) {
-                                    seenStringIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
-                                }
-                                break;
-                            case 130 /* NumberKeyword */:
-                                if (!seenNumericIndexer) {
-                                    seenNumericIndexer = true;
-                                }
-                                else {
-                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
-                                }
-                                break;
-                        }
-                    }
-                }
-            }
-        }
-        function checkPropertyDeclaration(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
-            checkVariableLikeDeclaration(node);
-        }
-        function checkMethodDeclaration(node) {
-            // Grammar checking
-            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
-            // Grammar checking for modifiers is done inside the function checkGrammarFunctionLikeDeclaration
-            checkFunctionOrMethodDeclaration(node);
-            // Abstract methods cannot have an implementation.
-            // Extra checks are to avoid reporting multiple errors relating to the "abstractness" of the node.
-            if (node.flags & 128 /* Abstract */ && node.body) {
-                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
-            }
-        }
-        function checkConstructorDeclaration(node) {
-            // Grammar check on signature of constructor and modifier of the constructor is done in checkSignatureDeclaration function.
-            checkSignatureDeclaration(node);
-            // Grammar check for checking only related to constructorDeclaration
-            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
-            checkSourceElement(node.body);
-            var symbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
-            // Only type check the symbol once
-            if (node === firstDeclaration) {
-                checkFunctionOrConstructorSymbol(symbol);
-            }
-            // exit early in the case of signature - super checks are not relevant to them
-            if (ts.nodeIsMissing(node.body)) {
-                return;
-            }
-            if (!produceDiagnostics) {
-                return;
-            }
-            function containsSuperCallAsComputedPropertyName(n) {
-                return n.name && containsSuperCall(n.name);
-            }
-            function containsSuperCall(n) {
-                if (ts.isSuperCallExpression(n)) {
-                    return true;
-                }
-                else if (ts.isFunctionLike(n)) {
-                    return false;
-                }
-                else if (ts.isClassLike(n)) {
-                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
-                }
-                return ts.forEachChild(n, containsSuperCall);
-            }
-            function markThisReferencesAsErrors(n) {
-                if (n.kind === 97 /* ThisKeyword */) {
-                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
-                }
-                else if (n.kind !== 179 /* FunctionExpression */ && n.kind !== 220 /* FunctionDeclaration */) {
-                    ts.forEachChild(n, markThisReferencesAsErrors);
-                }
-            }
-            function isInstancePropertyWithInitializer(n) {
-                return n.kind === 145 /* PropertyDeclaration */ &&
-                    !(n.flags & 32 /* Static */) &&
-                    !!n.initializer;
-            }
-            // TS 1.0 spec (April 2014): 8.3.2
-            // Constructors of classes with no extends clause may not contain super calls, whereas
-            // constructors of derived classes must contain at least one super call somewhere in their function body.
-            var containingClassDecl = node.parent;
-            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
-                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
-                var superCall = getSuperCallInConstructor(node);
-                if (superCall) {
-                    if (classExtendsNull) {
-                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
-                    }
-                    // The first statement in the body of a constructor (excluding prologue directives) must be a super call
-                    // if both of the following are true:
-                    // - The containing class is a derived class.
-                    // - The constructor declares parameter properties
-                    //   or the containing class declares instance member variables with initializers.
-                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
-                        ts.forEach(node.parameters, function (p) { return p.flags & 92 /* ParameterPropertyModifier */; });
-                    // Skip past any prologue directives to find the first statement
-                    // to ensure that it was a super call.
-                    if (superCallShouldBeFirst) {
-                        var statements = node.body.statements;
-                        var superCallStatement = void 0;
-                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
-                            var statement = statements_2[_i];
-                            if (statement.kind === 202 /* ExpressionStatement */ && ts.isSuperCallExpression(statement.expression)) {
-                                superCallStatement = statement;
-                                break;
-                            }
-                            if (!ts.isPrologueDirective(statement)) {
-                                break;
-                            }
-                        }
-                        if (!superCallStatement) {
-                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
-                        }
-                    }
-                }
-                else if (!classExtendsNull) {
-                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
-                }
-            }
-        }
-        function checkAccessorDeclaration(node) {
-            if (produceDiagnostics) {
-                // Grammar checking accessors
-                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
-                checkDecorators(node);
-                checkSignatureDeclaration(node);
-                if (node.kind === 149 /* GetAccessor */) {
-                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 32768 /* HasImplicitReturn */)) {
-                        if (node.flags & 65536 /* HasExplicitReturn */) {
-                            if (compilerOptions.noImplicitReturns) {
-                                error(node.name, ts.Diagnostics.Not_all_code_paths_return_a_value);
-                            }
-                        }
-                        else {
-                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
-                        }
-                    }
-                }
-                // Do not use hasDynamicName here, because that returns false for well known symbols.
-                // We want to perform checkComputedPropertyName for all computed properties, including
-                // well known symbols.
-                if (node.name.kind === 140 /* ComputedPropertyName */) {
-                    checkComputedPropertyName(node.name);
-                }
-                if (!ts.hasDynamicName(node)) {
-                    // TypeScript 1.0 spec (April 2014): 8.4.3
-                    // Accessors for the same member name must specify the same accessibility.
-                    var otherKind = node.kind === 149 /* GetAccessor */ ? 150 /* SetAccessor */ : 149 /* GetAccessor */;
-                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
-                    if (otherAccessor) {
-                        if (((node.flags & 28 /* AccessibilityModifier */) !== (otherAccessor.flags & 28 /* AccessibilityModifier */))) {
-                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
-                        }
-                        if (((node.flags & 128 /* Abstract */) !== (otherAccessor.flags & 128 /* Abstract */))) {
-                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
-                        }
-                        // TypeScript 1.0 spec (April 2014): 4.5
-                        // If both accessors include type annotations, the specified types must be identical.
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
-                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorThisType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
-                    }
-                }
-                getTypeOfAccessors(getSymbolOfNode(node));
-            }
-            if (node.parent.kind !== 171 /* ObjectLiteralExpression */) {
-                checkSourceElement(node.body);
-            }
-            else {
-                checkNodeDeferred(node);
-            }
-        }
-        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
-            var firstType = getAnnotatedType(first);
-            var secondType = getAnnotatedType(second);
-            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
-                error(first, message);
-            }
-        }
-        function checkAccessorDeferred(node) {
-            checkSourceElement(node.body);
-        }
-        function checkMissingDeclaration(node) {
-            checkDecorators(node);
-        }
-        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
-            var typeArguments;
-            var mapper;
-            var result = true;
-            for (var i = 0; i < typeParameters.length; i++) {
-                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
-                if (constraint) {
-                    if (!typeArguments) {
-                        typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
-                        mapper = createTypeMapper(typeParameters, typeArguments);
-                    }
-                    var typeArgument = typeArguments[i];
-                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
-                }
-            }
-            return result;
-        }
-        function checkTypeReferenceNode(node) {
-            checkGrammarTypeArguments(node, node.typeArguments);
-            var type = getTypeFromTypeReference(node);
-            if (type !== unknownType && node.typeArguments) {
-                // Do type argument local checks only if referenced type is successfully resolved
-                ts.forEach(node.typeArguments, checkSourceElement);
-                if (produceDiagnostics) {
-                    var symbol = getNodeLinks(node).resolvedSymbol;
-                    var typeParameters = symbol.flags & 524288 /* TypeAlias */ ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
-                    checkTypeArgumentConstraints(typeParameters, node.typeArguments);
-                }
-            }
-        }
-        function checkTypeQuery(node) {
-            getTypeFromTypeQueryNode(node);
-        }
-        function checkTypeLiteral(node) {
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-                checkObjectTypeForDuplicateDeclarations(node);
-            }
-        }
-        function checkArrayType(node) {
-            checkSourceElement(node.elementType);
-        }
-        function checkTupleType(node) {
-            // Grammar checking
-            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
-            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
-                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
-            }
-            ts.forEach(node.elementTypes, checkSourceElement);
-        }
-        function checkUnionOrIntersectionType(node) {
-            ts.forEach(node.types, checkSourceElement);
-        }
-        function isPrivateWithinAmbient(node) {
-            return (node.flags & 8 /* Private */) && ts.isInAmbientContext(node);
-        }
-        function getEffectiveDeclarationFlags(n, flagsToCheck) {
-            var flags = ts.getCombinedNodeFlags(n);
-            // children of classes (even ambient classes) should not be marked as ambient or export
-            // because those flags have no useful semantics there.
-            if (n.parent.kind !== 222 /* InterfaceDeclaration */ &&
-                n.parent.kind !== 221 /* ClassDeclaration */ &&
-                n.parent.kind !== 192 /* ClassExpression */ &&
-                ts.isInAmbientContext(n)) {
-                if (!(flags & 2 /* Ambient */)) {
-                    // It is nested in an ambient context, which means it is automatically exported
-                    flags |= 1 /* Export */;
-                }
-                flags |= 2 /* Ambient */;
-            }
-            return flags & flagsToCheck;
-        }
-        function checkFunctionOrConstructorSymbol(symbol) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            function getCanonicalOverload(overloads, implementation) {
-                // Consider the canonical set of flags to be the flags of the bodyDeclaration or the first declaration
-                // Error on all deviations from this canonical set of flags
-                // The caveat is that if some overloads are defined in lib.d.ts, we don't want to
-                // report the errors on those. To achieve this, we will say that the implementation is
-                // the canonical signature only if it is in the same container as the first overload
-                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
-                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
-            }
-            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
-                // Error if some overloads have a flag that is not shared by all overloads. To find the
-                // deviations, we XOR someOverloadFlags with allOverloadFlags
-                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
-                if (someButNotAllOverloadFlags !== 0) {
-                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
-                    ts.forEach(overloads, function (o) {
-                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
-                        if (deviation & 1 /* Export */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
-                        }
-                        else if (deviation & 2 /* Ambient */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
-                        }
-                        else if (deviation & (8 /* Private */ | 16 /* Protected */)) {
-                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
-                        }
-                        else if (deviation & 128 /* Abstract */) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
-                        }
-                    });
-                }
-            }
-            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
-                if (someHaveQuestionToken !== allHaveQuestionToken) {
-                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
-                    ts.forEach(overloads, function (o) {
-                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
-                        if (deviation) {
-                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
-                        }
-                    });
-                }
-            }
-            var flagsToCheck = 1 /* Export */ | 2 /* Ambient */ | 8 /* Private */ | 16 /* Protected */ | 128 /* Abstract */;
-            var someNodeFlags = 0;
-            var allNodeFlags = flagsToCheck;
-            var someHaveQuestionToken = false;
-            var allHaveQuestionToken = true;
-            var hasOverloads = false;
-            var bodyDeclaration;
-            var lastSeenNonAmbientDeclaration;
-            var previousDeclaration;
-            var declarations = symbol.declarations;
-            var isConstructor = (symbol.flags & 16384 /* Constructor */) !== 0;
-            function reportImplementationExpectedError(node) {
-                if (node.name && ts.nodeIsMissing(node.name)) {
-                    return;
-                }
-                var seen = false;
-                var subsequentNode = ts.forEachChild(node.parent, function (c) {
-                    if (seen) {
-                        return c;
-                    }
-                    else {
-                        seen = c === node;
-                    }
-                });
-                // We may be here because of some extra nodes between overloads that could not be parsed into a valid node.
-                // In this case the subsequent node is not really consecutive (.pos !== node.end), and we must ignore it here.
-                if (subsequentNode && subsequentNode.pos === node.end) {
-                    if (subsequentNode.kind === node.kind) {
-                        var errorNode_1 = subsequentNode.name || subsequentNode;
-                        // TODO(jfreeman): These are methods, so handle computed name case
-                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
-                            var reportError = (node.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) &&
-                                (node.flags & 32 /* Static */) !== (subsequentNode.flags & 32 /* Static */);
-                            // we can get here in two cases
-                            // 1. mixed static and instance class members
-                            // 2. something with the same name was defined before the set of overloads that prevents them from merging
-                            // here we'll report error only for the first case since for second we should already report error in binder
-                            if (reportError) {
-                                var diagnostic = node.flags & 32 /* Static */ ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
-                                error(errorNode_1, diagnostic);
-                            }
-                            return;
-                        }
-                        else if (ts.nodeIsPresent(subsequentNode.body)) {
-                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
-                            return;
-                        }
-                    }
-                }
-                var errorNode = node.name || node;
-                if (isConstructor) {
-                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
-                }
-                else {
-                    // Report different errors regarding non-consecutive blocks of declarations depending on whether
-                    // the node in question is abstract.
-                    if (node.flags & 128 /* Abstract */) {
-                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
-                    }
-                    else {
-                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
-                    }
-                }
-            }
-            // when checking exported function declarations across modules check only duplicate implementations
-            // names and consistency of modifiers are verified when we check local symbol
-            var isExportSymbolInsideModule = symbol.parent && symbol.parent.flags & 1536 /* Module */;
-            var duplicateFunctionDeclaration = false;
-            var multipleConstructorImplementation = false;
-            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
-                var current = declarations_4[_i];
-                var node = current;
-                var inAmbientContext = ts.isInAmbientContext(node);
-                var inAmbientContextOrInterface = node.parent.kind === 222 /* InterfaceDeclaration */ || node.parent.kind === 159 /* TypeLiteral */ || inAmbientContext;
-                if (inAmbientContextOrInterface) {
-                    // check if declarations are consecutive only if they are non-ambient
-                    // 1. ambient declarations can be interleaved
-                    // i.e. this is legal
-                    //     declare function foo();
-                    //     declare function bar();
-                    //     declare function foo();
-                    // 2. mixing ambient and non-ambient declarations is a separate error that will be reported - do not want to report an extra one
-                    previousDeclaration = undefined;
-                }
-                if (node.kind === 220 /* FunctionDeclaration */ || node.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */ || node.kind === 148 /* Constructor */) {
-                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
-                    someNodeFlags |= currentNodeFlags;
-                    allNodeFlags &= currentNodeFlags;
-                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
-                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
-                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
-                        if (isConstructor) {
-                            multipleConstructorImplementation = true;
-                        }
-                        else {
-                            duplicateFunctionDeclaration = true;
-                        }
-                    }
-                    else if (!isExportSymbolInsideModule && previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
-                        reportImplementationExpectedError(previousDeclaration);
-                    }
-                    if (ts.nodeIsPresent(node.body)) {
-                        if (!bodyDeclaration) {
-                            bodyDeclaration = node;
-                        }
-                    }
-                    else {
-                        hasOverloads = true;
-                    }
-                    previousDeclaration = node;
-                    if (!inAmbientContextOrInterface) {
-                        lastSeenNonAmbientDeclaration = node;
-                    }
-                }
-            }
-            if (multipleConstructorImplementation) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
-                });
-            }
-            if (duplicateFunctionDeclaration) {
-                ts.forEach(declarations, function (declaration) {
-                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
-                });
-            }
-            // Abstract methods can't have an implementation -- in particular, they don't need one.
-            if (!isExportSymbolInsideModule && lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
-                !(lastSeenNonAmbientDeclaration.flags & 128 /* Abstract */) && !lastSeenNonAmbientDeclaration.questionToken) {
-                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
-            }
-            if (hasOverloads) {
-                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
-                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
-                if (bodyDeclaration) {
-                    var signatures = getSignaturesOfSymbol(symbol);
-                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
-                    for (var _a = 0, signatures_3 = signatures; _a < signatures_3.length; _a++) {
-                        var signature = signatures_3[_a];
-                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
-                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
-                            break;
-                        }
-                    }
-                }
-            }
-        }
-        function checkExportsOnMergedDeclarations(node) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            // if localSymbol is defined on node then node itself is exported - check is required
-            var symbol = node.localSymbol;
-            if (!symbol) {
-                // local symbol is undefined => this declaration is non-exported.
-                // however symbol might contain other declarations that are exported
-                symbol = getSymbolOfNode(node);
-                if (!(symbol.flags & 7340032 /* Export */)) {
-                    // this is a pure local symbol (all declarations are non-exported) - no need to check anything
-                    return;
-                }
-            }
-            // run the check only for the first declaration in the list
-            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
-                return;
-            }
-            // we use SymbolFlags.ExportValue, SymbolFlags.ExportType and SymbolFlags.ExportNamespace
-            // to denote disjoint declarationSpaces (without making new enum type).
-            var exportedDeclarationSpaces = 0 /* None */;
-            var nonExportedDeclarationSpaces = 0 /* None */;
-            var defaultExportedDeclarationSpaces = 0 /* None */;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var d = _a[_i];
-                var declarationSpaces = getDeclarationSpaces(d);
-                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 /* Export */ | 512 /* Default */);
-                if (effectiveDeclarationFlags & 1 /* Export */) {
-                    if (effectiveDeclarationFlags & 512 /* Default */) {
-                        defaultExportedDeclarationSpaces |= declarationSpaces;
-                    }
-                    else {
-                        exportedDeclarationSpaces |= declarationSpaces;
-                    }
-                }
-                else {
-                    nonExportedDeclarationSpaces |= declarationSpaces;
-                }
-            }
-            // Spaces for anything not declared a 'default export'.
-            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
-            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
-            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
-                // declaration spaces for exported and non-exported declarations intersect
-                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
-                    var d = _c[_b];
-                    var declarationSpaces = getDeclarationSpaces(d);
-                    // Only error on the declarations that contributed to the intersecting spaces.
-                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
-                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
-                    }
-                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
-                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
-                    }
-                }
-            }
-            function getDeclarationSpaces(d) {
-                switch (d.kind) {
-                    case 222 /* InterfaceDeclaration */:
-                        return 2097152 /* ExportType */;
-                    case 225 /* ModuleDeclaration */:
-                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0 /* NonInstantiated */
-                            ? 4194304 /* ExportNamespace */ | 1048576 /* ExportValue */
-                            : 4194304 /* ExportNamespace */;
-                    case 221 /* ClassDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                        return 2097152 /* ExportType */ | 1048576 /* ExportValue */;
-                    case 229 /* ImportEqualsDeclaration */:
-                        var result_1 = 0;
-                        var target = resolveAlias(getSymbolOfNode(d));
-                        ts.forEach(target.declarations, function (d) { result_1 |= getDeclarationSpaces(d); });
-                        return result_1;
-                    default:
-                        return 1048576 /* ExportValue */;
-                }
-            }
-        }
-        function checkNonThenableType(type, location, message) {
-            type = getWidenedType(type);
-            if (!isTypeAny(type) && isTypeAssignableTo(type, getGlobalThenableType())) {
-                if (location) {
-                    if (!message) {
-                        message = ts.Diagnostics.Operand_for_await_does_not_have_a_valid_callable_then_member;
-                    }
-                    error(location, message);
-                }
-                return unknownType;
-            }
-            return type;
-        }
-        /**
-          * Gets the "promised type" of a promise.
-          * @param type The type of the promise.
-          * @remarks The "promised type" of a type is the type of the "value" parameter of the "onfulfilled" callback.
-          */
-        function getPromisedType(promise) {
-            //
-            //  { // promise
-            //      then( // thenFunction
-            //          onfulfilled: ( // onfulfilledParameterType
-            //              value: T // valueParameterType
-            //          ) => any
-            //      ): any;
-            //  }
-            //
-            if (promise.flags & 1 /* Any */) {
-                return undefined;
-            }
-            if ((promise.flags & 4096 /* Reference */) && promise.target === tryGetGlobalPromiseType()) {
-                return promise.typeArguments[0];
-            }
-            var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType();
-            if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) {
-                return undefined;
-            }
-            var thenFunction = getTypeOfPropertyOfType(promise, "then");
-            if (thenFunction && (thenFunction.flags & 1 /* Any */)) {
-                return undefined;
-            }
-            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0 /* Call */) : emptyArray;
-            if (thenSignatures.length === 0) {
-                return undefined;
-            }
-            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072 /* NEUndefined */);
-            if (onfulfilledParameterType.flags & 1 /* Any */) {
-                return undefined;
-            }
-            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0 /* Call */);
-            if (onfulfilledParameterSignatures.length === 0) {
-                return undefined;
-            }
-            var valueParameterType = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature));
-            return valueParameterType;
-        }
-        function getTypeOfFirstParameterOfSignature(signature) {
-            return getTypeAtPosition(signature, 0);
-        }
-        /**
-          * Gets the "awaited type" of a type.
-          * @param type The type to await.
-          * @remarks The "awaited type" of an expression is its "promised type" if the expression is a
-          * Promise-like type; otherwise, it is the type of the expression. This is used to reflect
-          * The runtime behavior of the `await` keyword.
-          */
-        function getAwaitedType(type) {
-            return checkAwaitedType(type, /*location*/ undefined, /*message*/ undefined);
-        }
-        function checkAwaitedType(type, location, message) {
-            return checkAwaitedTypeWorker(type);
-            function checkAwaitedTypeWorker(type) {
-                if (type.flags & 16384 /* Union */) {
-                    var types = [];
-                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
-                        var constituentType = _a[_i];
-                        types.push(checkAwaitedTypeWorker(constituentType));
-                    }
-                    return getUnionType(types);
-                }
-                else {
-                    var promisedType = getPromisedType(type);
-                    if (promisedType === undefined) {
-                        // The type was not a PromiseLike, so it could not be unwrapped any further.
-                        // As long as the type does not have a callable "then" property, it is
-                        // safe to return the type; otherwise, an error will have been reported in
-                        // the call to checkNonThenableType and we will return unknownType.
-                        //
-                        // An example of a non-promise "thenable" might be:
-                        //
-                        //  await { then(): void {} }
-                        //
-                        // The "thenable" does not match the minimal definition for a PromiseLike. When
-                        // a Promise/A+-compatible or ES6 promise tries to adopt this value, the promise
-                        // will never settle. We treat this as an error to help flag an early indicator
-                        // of a runtime problem. If the user wants to return this value from an async
-                        // function, they would need to wrap it in some other value. If they want it to
-                        // be treated as a promise, they can cast to <any>.
-                        return checkNonThenableType(type, location, message);
-                    }
-                    else {
-                        if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
-                            // We have a bad actor in the form of a promise whose promised type is
-                            // the same promise type, or a mutually recursive promise. Return the
-                            // unknown type as we cannot guess the shape. If this were the actual
-                            // case in the JavaScript, this Promise would never resolve.
-                            //
-                            // An example of a bad actor with a singly-recursive promise type might
-                            // be:
-                            //
-                            //  interface BadPromise {
-                            //      then(
-                            //          onfulfilled: (value: BadPromise) => any,
-                            //          onrejected: (error: any) => any): BadPromise;
-                            //  }
-                            //
-                            // The above interface will pass the PromiseLike check, and return a
-                            // promised type of `BadPromise`. Since this is a self reference, we
-                            // don't want to keep recursing ad infinitum.
-                            //
-                            // An example of a bad actor in the form of a mutually-recursive
-                            // promise type might be:
-                            //
-                            //  interface BadPromiseA {
-                            //      then(
-                            //          onfulfilled: (value: BadPromiseB) => any,
-                            //          onrejected: (error: any) => any): BadPromiseB;
-                            //  }
-                            //
-                            //  interface BadPromiseB {
-                            //      then(
-                            //          onfulfilled: (value: BadPromiseA) => any,
-                            //          onrejected: (error: any) => any): BadPromiseA;
-                            //  }
-                            //
-                            if (location) {
-                                error(location, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method, symbolToString(type.symbol));
-                            }
-                            return unknownType;
-                        }
-                        // Keep track of the type we're about to unwrap to avoid bad recursive promise types.
-                        // See the comments above for more information.
-                        awaitedTypeStack.push(type.id);
-                        var awaitedType = checkAwaitedTypeWorker(promisedType);
-                        awaitedTypeStack.pop();
-                        return awaitedType;
-                    }
-                }
-            }
-        }
-        /**
-         * Checks that the return type provided is an instantiation of the global Promise<T> type
-         * and returns the awaited type of the return type.
-         *
-         * @param returnType The return type of a FunctionLikeDeclaration
-         * @param location The node on which to report the error.
-         */
-        function checkCorrectPromiseType(returnType, location) {
-            if (returnType === unknownType) {
-                // The return type already had some other error, so we ignore and return
-                // the unknown type.
-                return unknownType;
-            }
-            var globalPromiseType = getGlobalPromiseType();
-            if (globalPromiseType === emptyGenericType
-                || globalPromiseType === getTargetType(returnType)) {
-                // Either we couldn't resolve the global promise type, which would have already
-                // reported an error, or we could resolve it and the return type is a valid type
-                // reference to the global type. In either case, we return the awaited type for
-                // the return type.
-                return checkAwaitedType(returnType, location, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-            }
-            // The promise type was not a valid type reference to the global promise type, so we
-            // report an error and return the unknown type.
-            error(location, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
-            return unknownType;
-        }
-        /**
-          * Checks the return type of an async function to ensure it is a compatible
-          * Promise implementation.
-          * @param node The signature to check
-          * @param returnType The return type for the function
-          * @remarks
-          * This checks that an async function has a valid Promise-compatible return type,
-          * and returns the *awaited type* of the promise. An async function has a valid
-          * Promise-compatible return type if the resolved value of the return type has a
-          * construct signature that takes in an `initializer` function that in turn supplies
-          * a `resolve` function as one of its arguments and results in an object with a
-          * callable `then` signature.
-          */
-        function checkAsyncFunctionReturnType(node) {
-            if (languageVersion >= 2 /* ES6 */) {
-                var returnType = getTypeFromTypeNode(node.type);
-                return checkCorrectPromiseType(returnType, node.type);
-            }
-            var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType();
-            if (globalPromiseConstructorLikeType === emptyObjectType) {
-                // If we couldn't resolve the global PromiseConstructorLike type we cannot verify
-                // compatibility with __awaiter.
-                return unknownType;
-            }
-            // As part of our emit for an async function, we will need to emit the entity name of
-            // the return type annotation as an expression. To meet the necessary runtime semantics
-            // for __awaiter, we must also check that the type of the declaration (e.g. the static
-            // side or "constructor" of the promise type) is compatible `PromiseConstructorLike`.
-            //
-            // An example might be (from lib.es6.d.ts):
-            //
-            //  interface Promise<T> { ... }
-            //  interface PromiseConstructor {
-            //      new <T>(...): Promise<T>;
-            //  }
-            //  declare var Promise: PromiseConstructor;
-            //
-            // When an async function declares a return type annotation of `Promise<T>`, we
-            // need to get the type of the `Promise` variable declaration above, which would
-            // be `PromiseConstructor`.
-            //
-            // The same case applies to a class:
-            //
-            //  declare class Promise<T> {
-            //      constructor(...);
-            //      then<U>(...): Promise<U>;
-            //  }
-            //
-            // When we get the type of the `Promise` symbol here, we get the type of the static
-            // side of the `Promise` class, which would be `{ new <T>(...): Promise<T> }`.
-            var promiseType = getTypeFromTypeNode(node.type);
-            if (promiseType === unknownType && compilerOptions.isolatedModules) {
-                // If we are compiling with isolatedModules, we may not be able to resolve the
-                // type as a value. As such, we will just return unknownType;
-                return unknownType;
-            }
-            var promiseConstructor = getNodeLinks(node.type).resolvedSymbol;
-            if (!promiseConstructor || !symbolIsValue(promiseConstructor)) {
-                var typeName = promiseConstructor
-                    ? symbolToString(promiseConstructor)
-                    : typeToString(promiseType);
-                error(node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName);
-                return unknownType;
-            }
-            // If the Promise constructor, resolved locally, is an alias symbol we should mark it as referenced.
-            checkReturnTypeAnnotationAsExpression(node);
-            // Validate the promise constructor type.
-            var promiseConstructorType = getTypeOfSymbol(promiseConstructor);
-            if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) {
-                return unknownType;
-            }
-            // Verify there is no local declaration that could collide with the promise constructor.
-            var promiseName = ts.getEntityNameFromTypeNode(node.type);
-            var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName);
-            var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455 /* Value */);
-            if (rootSymbol) {
-                error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor));
-                return unknownType;
-            }
-            // Get and return the awaited type of the return type.
-            return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
-        }
-        /** Check a decorator */
-        function checkDecorator(node) {
-            var signature = getResolvedSignature(node);
-            var returnType = getReturnTypeOfSignature(signature);
-            if (returnType.flags & 1 /* Any */) {
-                return;
-            }
-            var expectedReturnType;
-            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
-            var errorInfo;
-            switch (node.parent.kind) {
-                case 221 /* ClassDeclaration */:
-                    var classSymbol = getSymbolOfNode(node.parent);
-                    var classConstructorType = getTypeOfSymbol(classSymbol);
-                    expectedReturnType = getUnionType([classConstructorType, voidType]);
-                    break;
-                case 142 /* Parameter */:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 145 /* PropertyDeclaration */:
-                    expectedReturnType = voidType;
-                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
-                    break;
-                case 147 /* MethodDeclaration */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    var methodType = getTypeOfNode(node.parent);
-                    var descriptorType = createTypedPropertyDescriptorType(methodType);
-                    expectedReturnType = getUnionType([descriptorType, voidType]);
-                    break;
-            }
-            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
-        }
-        /** Checks a type reference node as an expression. */
-        function checkTypeNodeAsExpression(node) {
-            // When we are emitting type metadata for decorators, we need to try to check the type
-            // as if it were an expression so that we can emit the type in a value position when we
-            // serialize the type metadata.
-            if (node && node.kind === 155 /* TypeReference */) {
-                var root = getFirstIdentifier(node.typeName);
-                var meaning = root.parent.kind === 155 /* TypeReference */ ? 793056 /* Type */ : 1536 /* Namespace */;
-                // Resolve type so we know which symbol is referenced
-                var rootSymbol = resolveName(root, root.text, meaning | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-                // Resolved symbol is alias
-                if (rootSymbol && rootSymbol.flags & 8388608 /* Alias */) {
-                    var aliasTarget = resolveAlias(rootSymbol);
-                    // If alias has value symbol - mark alias as referenced
-                    if (aliasTarget.flags & 107455 /* Value */ && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
-                        markAliasSymbolAsReferenced(rootSymbol);
-                    }
-                }
-            }
-        }
-        /**
-          * Checks the type annotation of an accessor declaration or property declaration as
-          * an expression if it is a type reference to a type with a value declaration.
-          */
-        function checkTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        function checkReturnTypeAnnotationAsExpression(node) {
-            checkTypeNodeAsExpression(node.type);
-        }
-        /** Checks the type annotation of the parameters of a function/method or the constructor of a class as expressions */
-        function checkParameterTypeAnnotationsAsExpressions(node) {
-            // ensure all type annotations with a value declaration are checked as an expression
-            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
-                var parameter = _a[_i];
-                checkTypeAnnotationAsExpression(parameter);
-            }
-        }
-        /** Check the decorators of a node */
-        function checkDecorators(node) {
-            if (!node.decorators) {
-                return;
-            }
-            // skip this check for nodes that cannot have decorators. These should have already had an error reported by
-            // checkGrammarDecorators.
-            if (!ts.nodeCanBeDecorated(node)) {
-                return;
-            }
-            if (!compilerOptions.experimentalDecorators) {
-                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
-            }
-            if (compilerOptions.emitDecoratorMetadata) {
-                // we only need to perform these checks if we are emitting serialized type metadata for the target of a decorator.
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                        var constructor = ts.getFirstConstructorWithBody(node);
-                        if (constructor) {
-                            checkParameterTypeAnnotationsAsExpressions(constructor);
-                        }
-                        break;
-                    case 147 /* MethodDeclaration */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        checkParameterTypeAnnotationsAsExpressions(node);
-                        checkReturnTypeAnnotationAsExpression(node);
-                        break;
-                    case 145 /* PropertyDeclaration */:
-                    case 142 /* Parameter */:
-                        checkTypeAnnotationAsExpression(node);
-                        break;
-                }
-            }
-            ts.forEach(node.decorators, checkDecorator);
-        }
-        function checkFunctionDeclaration(node) {
-            if (produceDiagnostics) {
-                checkFunctionOrMethodDeclaration(node) || checkGrammarForGenerator(node);
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-        }
-        function checkFunctionOrMethodDeclaration(node) {
-            checkDecorators(node);
-            checkSignatureDeclaration(node);
-            var isAsync = ts.isAsyncFunctionLike(node);
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name && node.name.kind === 140 /* ComputedPropertyName */) {
-                // This check will account for methods in class/interface declarations,
-                // as well as accessors in classes/object literals
-                checkComputedPropertyName(node.name);
-            }
-            if (!ts.hasDynamicName(node)) {
-                // first we want to check the local symbol that contain this declaration
-                // - if node.localSymbol !== undefined - this is current declaration is exported and localSymbol points to the local symbol
-                // - if node.localSymbol === undefined - this node is non-exported so we can just pick the result of getSymbolOfNode
-                var symbol = getSymbolOfNode(node);
-                var localSymbol = node.localSymbol || symbol;
-                // Since the javascript won't do semantic analysis like typescript,
-                // if the javascript file comes before the typescript file and both contain same name functions,
-                // checkFunctionOrConstructorSymbol wouldn't be called if we didnt ignore javascript function.
-                var firstDeclaration = ts.forEach(localSymbol.declarations, 
-                // Get first non javascript function declaration
-                function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
-                    declaration : undefined; });
-                // Only type check the symbol once
-                if (node === firstDeclaration) {
-                    checkFunctionOrConstructorSymbol(localSymbol);
-                }
-                if (symbol.parent) {
-                    // run check once for the first declaration
-                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
-                        // run check on export symbol to check that modifiers agree across all exported declarations
-                        checkFunctionOrConstructorSymbol(symbol);
-                    }
-                }
-            }
-            checkSourceElement(node.body);
-            if (!node.asteriskToken) {
-                var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
-                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
-            }
-            if (produceDiagnostics && !node.type) {
-                // Report an implicit any error if there is no body, no explicit return type, and node is not a private method
-                // in an ambient context
-                if (compilerOptions.noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
-                    reportImplicitAnyError(node, anyType);
-                }
-                if (node.asteriskToken && ts.nodeIsPresent(node.body)) {
-                    // A generator with a body and no type annotation can still cause errors. It can error if the
-                    // yielded values have no common supertype, or it can give an implicit any error if it has no
-                    // yielded values. The only way to trigger these errors is to try checking its return type.
-                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
-                }
-            }
-        }
-        function checkBlock(node) {
-            // Grammar checking for SyntaxKind.Block
-            if (node.kind === 199 /* Block */) {
-                checkGrammarStatementInAmbientContext(node);
-            }
-            ts.forEach(node.statements, checkSourceElement);
-        }
-        function checkCollisionWithArgumentsInGeneratedCode(node) {
-            // no rest parameters \ declaration context \ overload - no codegen impact
-            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
-                return;
-            }
-            ts.forEach(node.parameters, function (p) {
-                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
-                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
-                }
-            });
-        }
-        function needCollisionCheckForIdentifier(node, identifier, name) {
-            if (!(identifier && identifier.text === name)) {
-                return false;
-            }
-            if (node.kind === 145 /* PropertyDeclaration */ ||
-                node.kind === 144 /* PropertySignature */ ||
-                node.kind === 147 /* MethodDeclaration */ ||
-                node.kind === 146 /* MethodSignature */ ||
-                node.kind === 149 /* GetAccessor */ ||
-                node.kind === 150 /* SetAccessor */) {
-                // it is ok to have member named '_super' or '_this' - member access is always qualified
-                return false;
-            }
-            if (ts.isInAmbientContext(node)) {
-                // ambient context - no codegen impact
-                return false;
-            }
-            var root = ts.getRootDeclaration(node);
-            if (root.kind === 142 /* Parameter */ && ts.nodeIsMissing(root.parent.body)) {
-                // just an overload - no codegen impact
-                return false;
-            }
-            return true;
-        }
-        function checkCollisionWithCapturedThisVariable(node, name) {
-            if (needCollisionCheckForIdentifier(node, name, "_this")) {
-                potentialThisCollisions.push(node);
-            }
-        }
-        // this function will run after checking the source file so 'CaptureThis' is correct for all nodes
-        function checkIfThisIsCapturedInEnclosingScope(node) {
-            var current = node;
-            while (current) {
-                if (getNodeCheckFlags(current) & 4 /* CaptureThis */) {
-                    var isDeclaration_1 = node.kind !== 69 /* Identifier */;
-                    if (isDeclaration_1) {
-                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
-                    }
-                    else {
-                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
-                    }
-                    return;
-                }
-                current = current.parent;
-            }
-        }
-        function checkCollisionWithCapturedSuperVariable(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
-                return;
-            }
-            // bubble up and find containing type
-            var enclosingClass = ts.getContainingClass(node);
-            // if containing type was not found or it is ambient - exit (no codegen)
-            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
-                return;
-            }
-            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
-                var isDeclaration_2 = node.kind !== 69 /* Identifier */;
-                if (isDeclaration_2) {
-                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
-                }
-                else {
-                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
-                }
-            }
-        }
-        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
-                return;
-            }
-            // Uninstantiated modules shouldnt do this check
-            if (node.kind === 225 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
-                return;
-            }
-            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent)) {
-                // If the declaration happens to be in external module, report error that require and exports are reserved keywords
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
-            }
-        }
-        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
-            if (!needCollisionCheckForIdentifier(node, name, "Promise")) {
-                return;
-            }
-            // Uninstantiated modules shouldnt do this check
-            if (node.kind === 225 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
-                return;
-            }
-            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
-            var parent = getDeclarationContainer(node);
-            if (parent.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent) && parent.flags & 2097152 /* HasAsyncFunctions */) {
-                // If the declaration happens to be in external module, report error that Promise is a reserved identifier.
-                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
-            }
-        }
-        function checkVarDeclaredNamesNotShadowed(node) {
-            // - ScriptBody : StatementList
-            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
-            // also occurs in the VarDeclaredNames of StatementList.
-            // - Block : { StatementList }
-            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
-            // also occurs in the VarDeclaredNames of StatementList.
-            // Variable declarations are hoisted to the top of their function scope. They can shadow
-            // block scoped declarations, which bind tighter. this will not be flagged as duplicate definition
-            // by the binder as the declaration scope is different.
-            // A non-initialized declaration is a no-op as the block declaration will resolve before the var
-            // declaration. the problem is if the declaration has an initializer. this will act as a write to the
-            // block declared value. this is fine for let, but not const.
-            // Only consider declarations with initializers, uninitialized const declarations will not
-            // step on a let/const variable.
-            // Do not consider const and const declarations, as duplicate block-scoped declarations
-            // are handled by the binder.
-            // We are only looking for const declarations that step on let\const declarations from a
-            // different scope. e.g.:
-            //      {
-            //          const x = 0; // localDeclarationSymbol obtained after name resolution will correspond to this declaration
-            //          const x = 0; // symbol for this declaration will be 'symbol'
-            //      }
-            // skip block-scoped variables and parameters
-            if ((ts.getCombinedNodeFlags(node) & 3072 /* BlockScoped */) !== 0 || ts.isParameterDeclaration(node)) {
-                return;
-            }
-            // skip variable declarations that don't have initializers
-            // NOTE: in ES6 spec initializer is required in variable declarations where name is binding pattern
-            // so we'll always treat binding elements as initialized
-            if (node.kind === 218 /* VariableDeclaration */ && !node.initializer) {
-                return;
-            }
-            var symbol = getSymbolOfNode(node);
-            if (symbol.flags & 1 /* FunctionScopedVariable */) {
-                var localDeclarationSymbol = resolveName(node, node.name.text, 3 /* Variable */, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
-                if (localDeclarationSymbol &&
-                    localDeclarationSymbol !== symbol &&
-                    localDeclarationSymbol.flags & 2 /* BlockScopedVariable */) {
-                    if (getDeclarationFlagsFromSymbol(localDeclarationSymbol) & 3072 /* BlockScoped */) {
-                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 219 /* VariableDeclarationList */);
-                        var container = varDeclList.parent.kind === 200 /* VariableStatement */ && varDeclList.parent.parent
-                            ? varDeclList.parent.parent
-                            : undefined;
-                        // names of block-scoped and function scoped variables can collide only
-                        // if block scoped variable is defined in the function\module\source file scope (because of variable hoisting)
-                        var namesShareScope = container &&
-                            (container.kind === 199 /* Block */ && ts.isFunctionLike(container.parent) ||
-                                container.kind === 226 /* ModuleBlock */ ||
-                                container.kind === 225 /* ModuleDeclaration */ ||
-                                container.kind === 256 /* SourceFile */);
-                        // here we know that function scoped variable is shadowed by block scoped one
-                        // if they are defined in the same scope - binder has already reported redeclaration error
-                        // otherwise if variable has an initializer - show error that initialization will fail
-                        // since LHS will be block scoped name instead of function scoped
-                        if (!namesShareScope) {
-                            var name_16 = symbolToString(localDeclarationSymbol);
-                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_16, name_16);
-                        }
-                    }
-                }
-            }
-        }
-        // Check that a parameter initializer contains no references to parameters declared to the right of itself
-        function checkParameterInitializer(node) {
-            if (ts.getRootDeclaration(node).kind !== 142 /* Parameter */) {
-                return;
-            }
-            var func = ts.getContainingFunction(node);
-            visit(node.initializer);
-            function visit(n) {
-                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
-                    // do not dive in types
-                    // skip declaration names (i.e. in object literal expressions)
-                    return;
-                }
-                if (n.kind === 172 /* PropertyAccessExpression */) {
-                    // skip property names in property access expression
-                    return visit(n.expression);
-                }
-                else if (n.kind === 69 /* Identifier */) {
-                    // check FunctionLikeDeclaration.locals (stores parameters\function local variable)
-                    // if it contains entry with a specified name
-                    var symbol = resolveName(n, n.text, 107455 /* Value */ | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
-                        return;
-                    }
-                    if (symbol.valueDeclaration === node) {
-                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
-                        return;
-                    }
-                    // locals map for function contain both parameters and function locals
-                    // so we need to do a bit of extra work to check if reference is legal
-                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (enclosingContainer === func) {
-                        if (symbol.valueDeclaration.kind === 142 /* Parameter */) {
-                            // it is ok to reference parameter in initializer if either
-                            // - parameter is located strictly on the left of current parameter declaration
-                            if (symbol.valueDeclaration.pos < node.pos) {
-                                return;
-                            }
-                            // - parameter is wrapped in function-like entity
-                            var current = n;
-                            while (current !== node.initializer) {
-                                if (ts.isFunctionLike(current.parent)) {
-                                    return;
-                                }
-                                // computed property names/initializers in instance property declaration of class like entities
-                                // are executed in constructor and thus deferred
-                                if (current.parent.kind === 145 /* PropertyDeclaration */ &&
-                                    !(current.parent.flags & 32 /* Static */) &&
-                                    ts.isClassLike(current.parent.parent)) {
-                                    return;
-                                }
-                                current = current.parent;
-                            }
-                        }
-                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
-                    }
-                }
-                else {
-                    return ts.forEachChild(n, visit);
-                }
-            }
-        }
-        // Check variable, parameter, or property declaration
-        function checkVariableLikeDeclaration(node) {
-            checkDecorators(node);
-            checkSourceElement(node.type);
-            // For a computed property, just check the initializer and exit
-            // Do not use hasDynamicName here, because that returns false for well known symbols.
-            // We want to perform checkComputedPropertyName for all computed properties, including
-            // well known symbols.
-            if (node.name.kind === 140 /* ComputedPropertyName */) {
-                checkComputedPropertyName(node.name);
-                if (node.initializer) {
-                    checkExpressionCached(node.initializer);
-                }
-            }
-            if (node.kind === 169 /* BindingElement */) {
-                // check computed properties inside property names of binding elements
-                if (node.propertyName && node.propertyName.kind === 140 /* ComputedPropertyName */) {
-                    checkComputedPropertyName(node.propertyName);
-                }
-                // check private/protected variable access
-                var parent_11 = node.parent.parent;
-                var parentType = getTypeForBindingElementParent(parent_11);
-                var name_17 = node.propertyName || node.name;
-                var property = getPropertyOfType(parentType, getTextOfPropertyName(name_17));
-                if (parent_11.initializer && property && getParentOfSymbol(property)) {
-                    checkClassPropertyAccess(parent_11, parent_11.initializer, parentType, property);
-                }
-            }
-            // For a binding pattern, check contained binding elements
-            if (ts.isBindingPattern(node.name)) {
-                ts.forEach(node.name.elements, checkSourceElement);
-            }
-            // For a parameter declaration with an initializer, error and exit if the containing function doesn't have a body
-            if (node.initializer && ts.getRootDeclaration(node).kind === 142 /* Parameter */ && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
-                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
-                return;
-            }
-            // For a binding pattern, validate the initializer and exit
-            if (ts.isBindingPattern(node.name)) {
-                // Don't validate for-in initializer as it is already an error
-                if (node.initializer && node.parent.parent.kind !== 207 /* ForInStatement */) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, /*headMessage*/ undefined);
-                    checkParameterInitializer(node);
-                }
-                return;
-            }
-            var symbol = getSymbolOfNode(node);
-            var type = getTypeOfVariableOrParameterOrProperty(symbol);
-            if (node === symbol.valueDeclaration) {
-                // Node is the primary declaration of the symbol, just validate the initializer
-                // Don't validate for-in initializer as it is already an error
-                if (node.initializer && node.parent.parent.kind !== 207 /* ForInStatement */) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, /*headMessage*/ undefined);
-                    checkParameterInitializer(node);
-                }
-            }
-            else {
-                // Node is a secondary declaration, check that type is identical to primary declaration and check that
-                // initializer is consistent with type associated with the node
-                var declarationType = getWidenedTypeForVariableLikeDeclaration(node);
-                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
-                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
-                }
-                if (node.initializer) {
-                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
-                }
-                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
-                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
-                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
-                }
-            }
-            if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */) {
-                // We know we don't have a binding pattern or computed name here
-                checkExportsOnMergedDeclarations(node);
-                if (node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) {
-                    checkVarDeclaredNamesNotShadowed(node);
-                }
-                checkCollisionWithCapturedSuperVariable(node, node.name);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-        }
-        function areDeclarationFlagsIdentical(left, right) {
-            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
-                return false;
-            }
-            var interestingFlags = 8 /* Private */ |
-                16 /* Protected */ |
-                256 /* Async */ |
-                128 /* Abstract */ |
-                64 /* Readonly */ |
-                32 /* Static */;
-            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
-        }
-        function checkVariableDeclaration(node) {
-            checkGrammarVariableDeclaration(node);
-            return checkVariableLikeDeclaration(node);
-        }
-        function checkBindingElement(node) {
-            checkGrammarBindingElement(node);
-            return checkVariableLikeDeclaration(node);
-        }
-        function checkVariableStatement(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
-            ts.forEach(node.declarationList.declarations, checkSourceElement);
-        }
-        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
-            // We only disallow modifier on a method declaration if it is a property of object-literal-expression
-            if (node.modifiers && node.parent.kind === 171 /* ObjectLiteralExpression */) {
-                if (ts.isAsyncFunctionLike(node)) {
-                    if (node.modifiers.length > 1) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                }
-                else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                }
-            }
-        }
-        function checkExpressionStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-        }
-        function checkIfStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.thenStatement);
-            if (node.thenStatement.kind === 201 /* EmptyStatement */) {
-                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
-            }
-            checkSourceElement(node.elseStatement);
-        }
-        function checkDoStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkSourceElement(node.statement);
-            checkExpression(node.expression);
-        }
-        function checkWhileStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkExpression(node.expression);
-            checkSourceElement(node.statement);
-        }
-        function checkForStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.initializer && node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    checkGrammarVariableDeclarationList(node.initializer);
-                }
-            }
-            if (node.initializer) {
-                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
-                }
-                else {
-                    checkExpression(node.initializer);
-                }
-            }
-            if (node.condition)
-                checkExpression(node.condition);
-            if (node.incrementor)
-                checkExpression(node.incrementor);
-            checkSourceElement(node.statement);
-        }
-        function checkForOfStatement(node) {
-            checkGrammarForInOrForOfStatement(node);
-            // Check the LHS and RHS
-            // If the LHS is a declaration, just check it as a variable declaration, which will in turn check the RHS
-            // via checkRightHandSideOfForOf.
-            // If the LHS is an expression, check the LHS, as a destructuring assignment or as a reference.
-            // Then check that the RHS is assignable to it.
-            if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                checkForInOrForOfVariableDeclaration(node);
-            }
-            else {
-                var varExpr = node.initializer;
-                var iteratedType = checkRightHandSideOfForOf(node.expression);
-                // There may be a destructuring assignment on the left side
-                if (varExpr.kind === 170 /* ArrayLiteralExpression */ || varExpr.kind === 171 /* ObjectLiteralExpression */) {
-                    // iteratedType may be undefined. In this case, we still want to check the structure of
-                    // varExpr, in particular making sure it's a valid LeftHandSideExpression. But we'd like
-                    // to short circuit the type relation checking as much as possible, so we pass the unknownType.
-                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
-                }
-                else {
-                    var leftType = checkExpression(varExpr);
-                    checkReferenceExpression(varExpr, /*invalidReferenceMessage*/ ts.Diagnostics.Invalid_left_hand_side_in_for_of_statement, 
-                    /*constantVariableMessage*/ ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property);
-                    // iteratedType will be undefined if the rightType was missing properties/signatures
-                    // required to get its iteratedType (like [Symbol.iterator] or next). This may be
-                    // because we accessed properties from anyType, or it may have led to an error inside
-                    // getElementTypeOfIterable.
-                    if (iteratedType) {
-                        checkTypeAssignableTo(iteratedType, leftType, varExpr, /*headMessage*/ undefined);
-                    }
-                }
-            }
-            checkSourceElement(node.statement);
-        }
-        function checkForInStatement(node) {
-            // Grammar checking
-            checkGrammarForInOrForOfStatement(node);
-            // TypeScript 1.0 spec  (April 2014): 5.4
-            // In a 'for-in' statement of the form
-            // for (let VarDecl in Expr) Statement
-            //   VarDecl must be a variable declaration without a type annotation that declares a variable of type Any,
-            //   and Expr must be an expression of type Any, an object type, or a type parameter type.
-            if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                var variable = node.initializer.declarations[0];
-                if (variable && ts.isBindingPattern(variable.name)) {
-                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
-                }
-                checkForInOrForOfVariableDeclaration(node);
-            }
-            else {
-                // In a 'for-in' statement of the form
-                // for (Var in Expr) Statement
-                //   Var must be an expression classified as a reference of type Any or the String primitive type,
-                //   and Expr must be an expression of type Any, an object type, or a type parameter type.
-                var varExpr = node.initializer;
-                var leftType = checkExpression(varExpr);
-                if (varExpr.kind === 170 /* ArrayLiteralExpression */ || varExpr.kind === 171 /* ObjectLiteralExpression */) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
-                }
-                else if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 /* StringLike */)) {
-                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
-                }
-                else {
-                    // run check only former check succeeded to avoid cascading errors
-                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_in_statement, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property);
-                }
-            }
-            var rightType = checkNonNullExpression(node.expression);
-            // unknownType is returned i.e. if node.expression is identifier whose name cannot be resolved
-            // in this case error about missing name is already reported - do not report extra one
-            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 /* ObjectType */ | 512 /* TypeParameter */)) {
-                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
-            }
-            checkSourceElement(node.statement);
-        }
-        function checkForInOrForOfVariableDeclaration(iterationStatement) {
-            var variableDeclarationList = iterationStatement.initializer;
-            // checkGrammarForInOrForOfStatement will check that there is exactly one declaration.
-            if (variableDeclarationList.declarations.length >= 1) {
-                var decl = variableDeclarationList.declarations[0];
-                checkVariableDeclaration(decl);
-            }
-        }
-        function checkRightHandSideOfForOf(rhsExpression) {
-            var expressionType = checkNonNullExpression(rhsExpression);
-            return checkIteratedTypeOrElementType(expressionType, rhsExpression, /*allowStringInput*/ true);
-        }
-        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput) {
-            if (isTypeAny(inputType)) {
-                return inputType;
-            }
-            if (languageVersion >= 2 /* ES6 */) {
-                return checkElementTypeOfIterable(inputType, errorNode);
-            }
-            if (allowStringInput) {
-                return checkElementTypeOfArrayOrString(inputType, errorNode);
-            }
-            if (isArrayLikeType(inputType)) {
-                var indexType = getIndexTypeOfType(inputType, 1 /* Number */);
-                if (indexType) {
-                    return indexType;
-                }
-            }
-            if (errorNode) {
-                error(errorNode, ts.Diagnostics.Type_0_is_not_an_array_type, typeToString(inputType));
-            }
-            return unknownType;
-        }
-        /**
-         * When errorNode is undefined, it means we should not report any errors.
-         */
-        function checkElementTypeOfIterable(iterable, errorNode) {
-            var elementType = getElementTypeOfIterable(iterable, errorNode);
-            // Now even though we have extracted the iteratedType, we will have to validate that the type
-            // passed in is actually an Iterable.
-            if (errorNode && elementType) {
-                checkTypeAssignableTo(iterable, createIterableType(elementType), errorNode);
-            }
-            return elementType || anyType;
-        }
-        /**
-         * We want to treat type as an iterable, and get the type it is an iterable of. The iterable
-         * must have the following structure (annotated with the names of the variables below):
-         *
-         * { // iterable
-         *     [Symbol.iterator]: { // iteratorFunction
-         *         (): Iterator<T>
-         *     }
-         * }
-         *
-         * T is the type we are after. At every level that involves analyzing return types
-         * of signatures, we union the return types of all the signatures.
-         *
-         * Another thing to note is that at any step of this process, we could run into a dead end,
-         * meaning either the property is missing, or we run into the anyType. If either of these things
-         * happens, we return undefined to signal that we could not find the iterated type. If a property
-         * is missing, and the previous step did not result in 'any', then we also give an error if the
-         * caller requested it. Then the caller can decide what to do in the case where there is no iterated
-         * type. This is different from returning anyType, because that would signify that we have matched the
-         * whole pattern and that T (above) is 'any'.
-         */
-        function getElementTypeOfIterable(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            var typeAsIterable = type;
-            if (!typeAsIterable.iterableElementType) {
-                // As an optimization, if the type is instantiated directly using the globalIterableType (Iterable<number>),
-                // then just grab its type argument.
-                if ((type.flags & 4096 /* Reference */) && type.target === getGlobalIterableType()) {
-                    typeAsIterable.iterableElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorFunction = getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator"));
-                    if (isTypeAny(iteratorFunction)) {
-                        return undefined;
-                    }
-                    var iteratorFunctionSignatures = iteratorFunction ? getSignaturesOfType(iteratorFunction, 0 /* Call */) : emptyArray;
-                    if (iteratorFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
-                        }
-                        return undefined;
-                    }
-                    typeAsIterable.iterableElementType = getElementTypeOfIterator(getUnionType(ts.map(iteratorFunctionSignatures, getReturnTypeOfSignature)), errorNode);
-                }
-            }
-            return typeAsIterable.iterableElementType;
-        }
-        /**
-         * This function has very similar logic as getElementTypeOfIterable, except that it operates on
-         * Iterators instead of Iterables. Here is the structure:
-         *
-         *  { // iterator
-         *      next: { // iteratorNextFunction
-         *          (): { // iteratorNextResult
-         *              value: T // iteratorNextValue
-         *          }
-         *      }
-         *  }
-         *
-         */
-        function getElementTypeOfIterator(type, errorNode) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            var typeAsIterator = type;
-            if (!typeAsIterator.iteratorElementType) {
-                // As an optimization, if the type is instantiated directly using the globalIteratorType (Iterator<number>),
-                // then just grab its type argument.
-                if ((type.flags & 4096 /* Reference */) && type.target === getGlobalIteratorType()) {
-                    typeAsIterator.iteratorElementType = type.typeArguments[0];
-                }
-                else {
-                    var iteratorNextFunction = getTypeOfPropertyOfType(type, "next");
-                    if (isTypeAny(iteratorNextFunction)) {
-                        return undefined;
-                    }
-                    var iteratorNextFunctionSignatures = iteratorNextFunction ? getSignaturesOfType(iteratorNextFunction, 0 /* Call */) : emptyArray;
-                    if (iteratorNextFunctionSignatures.length === 0) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.An_iterator_must_have_a_next_method);
-                        }
-                        return undefined;
-                    }
-                    var iteratorNextResult = getUnionType(ts.map(iteratorNextFunctionSignatures, getReturnTypeOfSignature));
-                    if (isTypeAny(iteratorNextResult)) {
-                        return undefined;
-                    }
-                    var iteratorNextValue = getTypeOfPropertyOfType(iteratorNextResult, "value");
-                    if (!iteratorNextValue) {
-                        if (errorNode) {
-                            error(errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
-                        }
-                        return undefined;
-                    }
-                    typeAsIterator.iteratorElementType = iteratorNextValue;
-                }
-            }
-            return typeAsIterator.iteratorElementType;
-        }
-        function getElementTypeOfIterableIterator(type) {
-            if (isTypeAny(type)) {
-                return undefined;
-            }
-            // As an optimization, if the type is instantiated directly using the globalIterableIteratorType (IterableIterator<number>),
-            // then just grab its type argument.
-            if ((type.flags & 4096 /* Reference */) && type.target === getGlobalIterableIteratorType()) {
-                return type.typeArguments[0];
-            }
-            return getElementTypeOfIterable(type, /*errorNode*/ undefined) ||
-                getElementTypeOfIterator(type, /*errorNode*/ undefined);
-        }
-        /**
-         * This function does the following steps:
-         *   1. Break up arrayOrStringType (possibly a union) into its string constituents and array constituents.
-         *   2. Take the element types of the array constituents.
-         *   3. Return the union of the element types, and string if there was a string constituent.
-         *
-         * For example:
-         *     string -> string
-         *     number[] -> number
-         *     string[] | number[] -> string | number
-         *     string | number[] -> string | number
-         *     string | string[] | number[] -> string | number
-         *
-         * It also errors if:
-         *   1. Some constituent is neither a string nor an array.
-         *   2. Some constituent is a string and target is less than ES5 (because in ES3 string is not indexable).
-         */
-        function checkElementTypeOfArrayOrString(arrayOrStringType, errorNode) {
-            ts.Debug.assert(languageVersion < 2 /* ES6 */);
-            // After we remove all types that are StringLike, we will know if there was a string constituent
-            // based on whether the remaining type is the same as the initial type.
-            var arrayType = arrayOrStringType;
-            if (arrayOrStringType.flags & 16384 /* Union */) {
-                arrayType = getUnionType(ts.filter(arrayOrStringType.types, function (t) { return !(t.flags & 258 /* StringLike */); }));
-            }
-            else if (arrayOrStringType.flags & 258 /* StringLike */) {
-                arrayType = neverType;
-            }
-            var hasStringConstituent = arrayOrStringType !== arrayType;
-            var reportedError = false;
-            if (hasStringConstituent) {
-                if (languageVersion < 1 /* ES5 */) {
-                    error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
-                    reportedError = true;
-                }
-                // Now that we've removed all the StringLike types, if no constituents remain, then the entire
-                // arrayOrStringType was a string.
-                if (arrayType === neverType) {
-                    return stringType;
-                }
-            }
-            if (!isArrayLikeType(arrayType)) {
-                if (!reportedError) {
-                    // Which error we report depends on whether there was a string constituent. For example,
-                    // if the input type is number | string, we want to say that number is not an array type.
-                    // But if the input was just number, we want to say that number is not an array type
-                    // or a string type.
-                    var diagnostic = hasStringConstituent
-                        ? ts.Diagnostics.Type_0_is_not_an_array_type
-                        : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
-                    error(errorNode, diagnostic, typeToString(arrayType));
-                }
-                return hasStringConstituent ? stringType : unknownType;
-            }
-            var arrayElementType = getIndexTypeOfType(arrayType, 1 /* Number */) || unknownType;
-            if (hasStringConstituent) {
-                // This is just an optimization for the case where arrayOrStringType is string | string[]
-                if (arrayElementType.flags & 258 /* StringLike */) {
-                    return stringType;
-                }
-                return getUnionType([arrayElementType, stringType]);
-            }
-            return arrayElementType;
-        }
-        function checkBreakOrContinueStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
-            // TODO: Check that target label is valid
-        }
-        function isGetAccessorWithAnnotatedSetAccessor(node) {
-            return !!(node.kind === 149 /* GetAccessor */ && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 150 /* SetAccessor */)));
-        }
-        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
-            var unwrappedReturnType = ts.isAsyncFunctionLike(func) ? getPromisedType(returnType) : returnType;
-            return maybeTypeOfKind(unwrappedReturnType, 16 /* Void */ | 1 /* Any */);
-        }
-        function checkReturnStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var functionBlock = ts.getContainingFunction(node);
-                if (!functionBlock) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
-                }
-            }
-            var func = ts.getContainingFunction(node);
-            if (func) {
-                var signature = getSignatureFromDeclaration(func);
-                var returnType = getReturnTypeOfSignature(signature);
-                if (strictNullChecks || node.expression || returnType === neverType) {
-                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
-                    if (func.asteriskToken) {
-                        // A generator does not need its return expressions checked against its return type.
-                        // Instead, the yield expressions are checked against the element type.
-                        // TODO: Check return expressions of generators when return type tracking is added
-                        // for generators.
-                        return;
-                    }
-                    if (func.kind === 150 /* SetAccessor */) {
-                        if (node.expression) {
-                            error(node.expression, ts.Diagnostics.Setters_cannot_return_a_value);
-                        }
-                    }
-                    else if (func.kind === 148 /* Constructor */) {
-                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node.expression)) {
-                            error(node.expression, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
-                        }
-                    }
-                    else if (func.type || isGetAccessorWithAnnotatedSetAccessor(func)) {
-                        if (ts.isAsyncFunctionLike(func)) {
-                            var promisedType = getPromisedType(returnType);
-                            var awaitedType = checkAwaitedType(exprType, node.expression || node, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
-                            if (promisedType) {
-                                // If the function has a return type, but promisedType is
-                                // undefined, an error will be reported in checkAsyncFunctionReturnType
-                                // so we don't need to report one here.
-                                checkTypeAssignableTo(awaitedType, promisedType, node.expression || node);
-                            }
-                        }
-                        else {
-                            checkTypeAssignableTo(exprType, returnType, node.expression || node);
-                        }
-                    }
-                }
-                else if (func.kind !== 148 /* Constructor */ && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
-                    // The function has a return type, but the return statement doesn't have an expression.
-                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
-                }
-            }
-        }
-        function checkWithStatement(node) {
-            // Grammar checking for withStatement
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.flags & 33554432 /* AwaitContext */) {
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
-                }
-            }
-            checkExpression(node.expression);
-            error(node.expression, ts.Diagnostics.All_symbols_within_a_with_block_will_be_resolved_to_any);
-        }
-        function checkSwitchStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            var firstDefaultClause;
-            var hasDuplicateDefaultClause = false;
-            var expressionType = checkExpression(node.expression);
-            ts.forEach(node.caseBlock.clauses, function (clause) {
-                // Grammar check for duplicate default clauses, skip if we already report duplicate default clause
-                if (clause.kind === 250 /* DefaultClause */ && !hasDuplicateDefaultClause) {
-                    if (firstDefaultClause === undefined) {
-                        firstDefaultClause = clause;
-                    }
-                    else {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
-                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
-                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
-                        hasDuplicateDefaultClause = true;
-                    }
-                }
-                if (produceDiagnostics && clause.kind === 249 /* CaseClause */) {
-                    var caseClause = clause;
-                    // TypeScript 1.0 spec (April 2014): 5.9
-                    // In a 'switch' statement, each 'case' expression must be of a type that is comparable
-                    // to or from the type of the 'switch' expression.
-                    var caseType = checkExpression(caseClause.expression);
-                    if (!isTypeComparableTo(expressionType, caseType)) {
-                        // expressionType is not comparable to caseType, try the reversed check and report errors if it fails
-                        checkTypeComparableTo(caseType, expressionType, caseClause.expression, /*headMessage*/ undefined);
-                    }
-                }
-                ts.forEach(clause.statements, checkSourceElement);
-            });
-        }
-        function checkLabeledStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                var current = node.parent;
-                while (current) {
-                    if (ts.isFunctionLike(current)) {
-                        break;
-                    }
-                    if (current.kind === 214 /* LabeledStatement */ && current.label.text === node.label.text) {
-                        var sourceFile = ts.getSourceFileOfNode(node);
-                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
-                        break;
-                    }
-                    current = current.parent;
-                }
-            }
-            // ensure that label is unique
-            checkSourceElement(node.statement);
-        }
-        function checkThrowStatement(node) {
-            // Grammar checking
-            if (!checkGrammarStatementInAmbientContext(node)) {
-                if (node.expression === undefined) {
-                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
-                }
-            }
-            if (node.expression) {
-                checkExpression(node.expression);
-            }
-        }
-        function checkTryStatement(node) {
-            // Grammar checking
-            checkGrammarStatementInAmbientContext(node);
-            checkBlock(node.tryBlock);
-            var catchClause = node.catchClause;
-            if (catchClause) {
-                // Grammar checking
-                if (catchClause.variableDeclaration) {
-                    if (catchClause.variableDeclaration.name.kind !== 69 /* Identifier */) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.name, ts.Diagnostics.Catch_clause_variable_name_must_be_an_identifier);
-                    }
-                    else if (catchClause.variableDeclaration.type) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
-                    }
-                    else if (catchClause.variableDeclaration.initializer) {
-                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
-                    }
-                    else {
-                        var identifierName = catchClause.variableDeclaration.name.text;
-                        var locals = catchClause.block.locals;
-                        if (locals && ts.hasProperty(locals, identifierName)) {
-                            var localSymbol = locals[identifierName];
-                            if (localSymbol && (localSymbol.flags & 2 /* BlockScopedVariable */) !== 0) {
-                                grammarErrorOnNode(localSymbol.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, identifierName);
-                            }
-                        }
-                    }
-                }
-                checkBlock(catchClause.block);
-            }
-            if (node.finallyBlock) {
-                checkBlock(node.finallyBlock);
-            }
-        }
-        function checkIndexConstraints(type) {
-            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1 /* Number */);
-            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0 /* String */);
-            var stringIndexType = getIndexTypeOfType(type, 0 /* String */);
-            var numberIndexType = getIndexTypeOfType(type, 1 /* Number */);
-            if (stringIndexType || numberIndexType) {
-                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
-                    var propType = getTypeOfSymbol(prop);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
-                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
-                });
-                if (type.flags & 1024 /* Class */ && ts.isClassLike(type.symbol.valueDeclaration)) {
-                    var classDeclaration = type.symbol.valueDeclaration;
-                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
-                        var member = _a[_i];
-                        // Only process instance properties with computed names here.
-                        // Static properties cannot be in conflict with indexers,
-                        // and properties with literal names were already checked.
-                        if (!(member.flags & 32 /* Static */) && ts.hasDynamicName(member)) {
-                            var propType = getTypeOfSymbol(member.symbol);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
-                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
-                        }
-                    }
-                }
-            }
-            var errorNode;
-            if (stringIndexType && numberIndexType) {
-                errorNode = declaredNumberIndexer || declaredStringIndexer;
-                // condition 'errorNode === undefined' may appear if types does not declare nor string neither number indexer
-                if (!errorNode && (type.flags & 2048 /* Interface */)) {
-                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0 /* String */) && getIndexTypeOfType(base, 1 /* Number */); });
-                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
-                }
-            }
-            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
-                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
-            }
-            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
-                if (!indexType) {
-                    return;
-                }
-                // index is numeric and property name is not valid numeric literal
-                if (indexKind === 1 /* Number */ && !isNumericName(prop.valueDeclaration.name)) {
-                    return;
-                }
-                // perform property check if property or indexer is declared in 'type'
-                // this allows to rule out cases when both property and indexer are inherited from the base class
-                var errorNode;
-                if (prop.valueDeclaration.name.kind === 140 /* ComputedPropertyName */ || prop.parent === containingType.symbol) {
-                    errorNode = prop.valueDeclaration;
-                }
-                else if (indexDeclaration) {
-                    errorNode = indexDeclaration;
-                }
-                else if (containingType.flags & 2048 /* Interface */) {
-                    // for interfaces property and indexer might be inherited from different bases
-                    // check if any base class already has both property and indexer.
-                    // check should be performed only if 'type' is the first type that brings property\indexer together
-                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
-                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
-                }
-                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
-                    var errorMessage = indexKind === 0 /* String */
-                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
-                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
-                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
-                }
-            }
-        }
-        function checkTypeNameIsReserved(name, message) {
-            // TS 1.0 spec (April 2014): 3.6.1
-            // The predefined type keywords are reserved and cannot be used as names of user defined types.
-            switch (name.text) {
-                case "any":
-                case "number":
-                case "boolean":
-                case "string":
-                case "symbol":
-                case "void":
-                    error(name, message, name.text);
-            }
-        }
-        /** Check each type parameter and check that type parameters have no duplicate type parameter declarations */
-        function checkTypeParameters(typeParameterDeclarations) {
-            if (typeParameterDeclarations) {
-                for (var i = 0, n = typeParameterDeclarations.length; i < n; i++) {
-                    var node = typeParameterDeclarations[i];
-                    checkTypeParameter(node);
-                    if (produceDiagnostics) {
-                        for (var j = 0; j < i; j++) {
-                            if (typeParameterDeclarations[j].symbol === node.symbol) {
-                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
-                            }
-                        }
-                    }
-                }
-            }
-        }
-        /** Check that type parameter lists are identical across multiple declarations */
-        function checkTypeParameterListsIdentical(node, symbol) {
-            if (symbol.declarations.length === 1) {
-                return;
-            }
-            var firstDecl;
-            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                var declaration = _a[_i];
-                if (declaration.kind === 221 /* ClassDeclaration */ || declaration.kind === 222 /* InterfaceDeclaration */) {
-                    if (!firstDecl) {
-                        firstDecl = declaration;
-                    }
-                    else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) {
-                        error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text);
-                    }
-                }
-            }
-        }
-        function checkClassExpression(node) {
-            checkClassLikeDeclaration(node);
-            checkNodeDeferred(node);
-            return getTypeOfSymbol(getSymbolOfNode(node));
-        }
-        function checkClassExpressionDeferred(node) {
-            ts.forEach(node.members, checkSourceElement);
-        }
-        function checkClassDeclaration(node) {
-            if (!node.name && !(node.flags & 512 /* Default */)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
-            }
-            checkClassLikeDeclaration(node);
-            ts.forEach(node.members, checkSourceElement);
-        }
-        function checkClassLikeDeclaration(node) {
-            checkGrammarClassDeclarationHeritageClauses(node);
-            checkDecorators(node);
-            if (node.name) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            }
-            checkTypeParameters(node.typeParameters);
-            checkExportsOnMergedDeclarations(node);
-            var symbol = getSymbolOfNode(node);
-            var type = getDeclaredTypeOfSymbol(symbol);
-            var typeWithThis = getTypeWithThisArgument(type);
-            var staticType = getTypeOfSymbol(symbol);
-            checkTypeParameterListsIdentical(node, symbol);
-            checkClassForDuplicateDeclarations(node);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                var baseTypes = getBaseTypes(type);
-                if (baseTypes.length && produceDiagnostics) {
-                    var baseType_1 = baseTypes[0];
-                    var staticBaseType = getBaseConstructorTypeOfClass(type);
-                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
-                    checkSourceElement(baseTypeNode.expression);
-                    if (baseTypeNode.typeArguments) {
-                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
-                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments); _i < _a.length; _i++) {
-                            var constructor = _a[_i];
-                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
-                                break;
-                            }
-                        }
-                    }
-                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
-                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
-                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32 /* Class */)) {
-                        // When the static base type is a "class-like" constructor function (but not actually a class), we verify
-                        // that all instantiated base constructor signatures return the same type. We can simply compare the type
-                        // references (as opposed to checking the structure of the types) because elsewhere we have already checked
-                        // that the base type is a class or interface type (and not, for example, an anonymous object type).
-                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
-                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
-                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
-                        }
-                    }
-                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
-                }
-            }
-            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
-            if (implementedTypeNodes) {
-                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
-                    var typeRefNode = implementedTypeNodes_1[_b];
-                    if (!ts.isSupportedExpressionWithTypeArguments(typeRefNode)) {
-                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
-                    }
-                    checkTypeReferenceNode(typeRefNode);
-                    if (produceDiagnostics) {
-                        var t = getTypeFromTypeNode(typeRefNode);
-                        if (t !== unknownType) {
-                            var declaredType = (t.flags & 4096 /* Reference */) ? t.target : t;
-                            if (declaredType.flags & (1024 /* Class */ | 2048 /* Interface */)) {
-                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
-                            }
-                            else {
-                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
-                            }
-                        }
-                    }
-                }
-            }
-            if (produceDiagnostics) {
-                checkIndexConstraints(type);
-                checkTypeForDuplicateIndexSignatures(node);
-            }
-        }
-        function checkBaseTypeAccessibility(type, node) {
-            var signatures = getSignaturesOfType(type, 1 /* Construct */);
-            if (signatures.length) {
-                var declaration = signatures[0].declaration;
-                if (declaration && declaration.flags & 8 /* Private */) {
-                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
-                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
-                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, node.expression.text);
-                    }
-                }
-            }
-        }
-        function getTargetSymbol(s) {
-            // if symbol is instantiated its flags are not copied from the 'target'
-            // so we'll need to get back original 'target' symbol to work with correct set of flags
-            return s.flags & 16777216 /* Instantiated */ ? getSymbolLinks(s).target : s;
-        }
-        function getClassLikeDeclarationOfSymbol(symbol) {
-            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
-        }
-        function checkKindsOfPropertyMemberOverrides(type, baseType) {
-            // TypeScript 1.0 spec (April 2014): 8.2.3
-            // A derived class inherits all members from its base class it doesn't override.
-            // Inheritance means that a derived class implicitly contains all non - overridden members of the base class.
-            // Both public and private property members are inherited, but only public property members can be overridden.
-            // A property member in a derived class is said to override a property member in a base class
-            // when the derived class property member has the same name and kind(instance or static)
-            // as the base class property member.
-            // The type of an overriding property member must be assignable(section 3.8.4)
-            // to the type of the overridden property member, or otherwise a compile - time error occurs.
-            // Base class instance member functions can be overridden by derived class instance member functions,
-            // but not by other kinds of members.
-            // Base class instance member variables and accessors can be overridden by
-            // derived class instance member variables and accessors, but not by other kinds of members.
-            // NOTE: assignability is checked in checkClassDeclaration
-            var baseProperties = getPropertiesOfObjectType(baseType);
-            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
-                var baseProperty = baseProperties_1[_i];
-                var base = getTargetSymbol(baseProperty);
-                if (base.flags & 134217728 /* Prototype */) {
-                    continue;
-                }
-                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
-                var baseDeclarationFlags = getDeclarationFlagsFromSymbol(base);
-                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
-                if (derived) {
-                    // In order to resolve whether the inherited method was overridden in the base class or not,
-                    // we compare the Symbols obtained. Since getTargetSymbol returns the symbol on the *uninstantiated*
-                    // type declaration, derived and base resolve to the same symbol even in the case of generic classes.
-                    if (derived === base) {
-                        // derived class inherits base without override/redeclaration
-                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
-                        // It is an error to inherit an abstract member without implementing it or being declared abstract.
-                        // If there is no declaration for the derived class (as in the case of class expressions),
-                        // then the class cannot be declared abstract.
-                        if (baseDeclarationFlags & 128 /* Abstract */ && (!derivedClassDecl || !(derivedClassDecl.flags & 128 /* Abstract */))) {
-                            if (derivedClassDecl.kind === 192 /* ClassExpression */) {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
-                            }
-                            else {
-                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
-                            }
-                        }
-                    }
-                    else {
-                        // derived overrides base.
-                        var derivedDeclarationFlags = getDeclarationFlagsFromSymbol(derived);
-                        if ((baseDeclarationFlags & 8 /* Private */) || (derivedDeclarationFlags & 8 /* Private */)) {
-                            // either base or derived property is private - not override, skip it
-                            continue;
-                        }
-                        if ((baseDeclarationFlags & 32 /* Static */) !== (derivedDeclarationFlags & 32 /* Static */)) {
-                            // value of 'static' is not the same for properties - not override, skip it
-                            continue;
-                        }
-                        if ((base.flags & derived.flags & 8192 /* Method */) || ((base.flags & 98308 /* PropertyOrAccessor */) && (derived.flags & 98308 /* PropertyOrAccessor */))) {
-                            // method is overridden with method or property/accessor is overridden with property/accessor - correct case
-                            continue;
-                        }
-                        var errorMessage = void 0;
-                        if (base.flags & 8192 /* Method */) {
-                            if (derived.flags & 98304 /* Accessor */) {
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
-                            }
-                            else {
-                                ts.Debug.assert((derived.flags & 4 /* Property */) !== 0);
-                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
-                            }
-                        }
-                        else if (base.flags & 4 /* Property */) {
-                            ts.Debug.assert((derived.flags & 8192 /* Method */) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        else {
-                            ts.Debug.assert((base.flags & 98304 /* Accessor */) !== 0);
-                            ts.Debug.assert((derived.flags & 8192 /* Method */) !== 0);
-                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
-                        }
-                        error(derived.valueDeclaration.name, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
-                    }
-                }
-            }
-        }
-        function isAccessor(kind) {
-            return kind === 149 /* GetAccessor */ || kind === 150 /* SetAccessor */;
-        }
-        function areTypeParametersIdentical(list1, list2) {
-            if (!list1 && !list2) {
-                return true;
-            }
-            if (!list1 || !list2 || list1.length !== list2.length) {
-                return false;
-            }
-            // TypeScript 1.0 spec (April 2014):
-            // When a generic interface has multiple declarations,  all declarations must have identical type parameter
-            // lists, i.e. identical type parameter names with identical constraints in identical order.
-            for (var i = 0, len = list1.length; i < len; i++) {
-                var tp1 = list1[i];
-                var tp2 = list2[i];
-                if (tp1.name.text !== tp2.name.text) {
-                    return false;
-                }
-                if (!tp1.constraint && !tp2.constraint) {
-                    continue;
-                }
-                if (!tp1.constraint || !tp2.constraint) {
-                    return false;
-                }
-                if (!isTypeIdenticalTo(getTypeFromTypeNode(tp1.constraint), getTypeFromTypeNode(tp2.constraint))) {
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkInheritedPropertiesAreIdentical(type, typeNode) {
-            var baseTypes = getBaseTypes(type);
-            if (baseTypes.length < 2) {
-                return true;
-            }
-            var seen = {};
-            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen[p.name] = { prop: p, containingType: type }; });
-            var ok = true;
-            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
-                var base = baseTypes_2[_i];
-                var properties = getPropertiesOfObjectType(getTypeWithThisArgument(base, type.thisType));
-                for (var _a = 0, properties_4 = properties; _a < properties_4.length; _a++) {
-                    var prop = properties_4[_a];
-                    if (!ts.hasProperty(seen, prop.name)) {
-                        seen[prop.name] = { prop: prop, containingType: base };
-                    }
-                    else {
-                        var existing = seen[prop.name];
-                        var isInheritedProperty = existing.containingType !== type;
-                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
-                            ok = false;
-                            var typeName1 = typeToString(existing.containingType);
-                            var typeName2 = typeToString(base);
-                            var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
-                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
-                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
-                        }
-                    }
-                }
-            }
-            return ok;
-        }
-        function checkInterfaceDeclaration(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
-            checkTypeParameters(node.typeParameters);
-            if (produceDiagnostics) {
-                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                checkTypeParameterListsIdentical(node, symbol);
-                // Only check this symbol once
-                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */);
-                if (node === firstInterfaceDecl) {
-                    var type = getDeclaredTypeOfSymbol(symbol);
-                    var typeWithThis = getTypeWithThisArgument(type);
-                    // run subsequent checks only if first set succeeded
-                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
-                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
-                            var baseType = _a[_i];
-                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
-                        }
-                        checkIndexConstraints(type);
-                    }
-                }
-                checkObjectTypeForDuplicateDeclarations(node);
-            }
-            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
-                if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
-                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
-                }
-                checkTypeReferenceNode(heritageElement);
-            });
-            ts.forEach(node.members, checkSourceElement);
-            if (produceDiagnostics) {
-                checkTypeForDuplicateIndexSignatures(node);
-            }
-        }
-        function checkTypeAliasDeclaration(node) {
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
-            checkSourceElement(node.type);
-        }
-        function computeEnumMemberValues(node) {
-            var nodeLinks = getNodeLinks(node);
-            if (!(nodeLinks.flags & 16384 /* EnumValuesComputed */)) {
-                var enumSymbol = getSymbolOfNode(node);
-                var enumType = getDeclaredTypeOfSymbol(enumSymbol);
-                var autoValue = 0; // set to undefined when enum member is non-constant
-                var ambient = ts.isInAmbientContext(node);
-                var enumIsConst = ts.isConst(node);
-                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
-                    var member = _a[_i];
-                    if (isComputedNonLiteralName(member.name)) {
-                        error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
-                    }
-                    else {
-                        var text = getTextOfPropertyName(member.name);
-                        if (isNumericLiteralName(text)) {
-                            error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
-                        }
-                    }
-                    var previousEnumMemberIsNonConstant = autoValue === undefined;
-                    var initializer = member.initializer;
-                    if (initializer) {
-                        autoValue = computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient);
-                    }
-                    else if (ambient && !enumIsConst) {
-                        // In ambient enum declarations that specify no const modifier, enum member declarations
-                        // that omit a value are considered computed members (as opposed to having auto-incremented values assigned).
-                        autoValue = undefined;
-                    }
-                    else if (previousEnumMemberIsNonConstant) {
-                        // If the member declaration specifies no value, the member is considered a constant enum member.
-                        // If the member is the first member in the enum declaration, it is assigned the value zero.
-                        // Otherwise, it is assigned the value of the immediately preceding member plus one,
-                        // and an error occurs if the immediately preceding member is not a constant enum member
-                        error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
-                    }
-                    if (autoValue !== undefined) {
-                        getNodeLinks(member).enumMemberValue = autoValue;
-                        autoValue++;
-                    }
-                }
-                nodeLinks.flags |= 16384 /* EnumValuesComputed */;
-            }
-            function computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient) {
-                // Controls if error should be reported after evaluation of constant value is completed
-                // Can be false if another more precise error was already reported during evaluation.
-                var reportError = true;
-                var value = evalConstant(initializer);
-                if (reportError) {
-                    if (value === undefined) {
-                        if (enumIsConst) {
-                            error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else if (ambient) {
-                            error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
-                        }
-                        else {
-                            // Only here do we need to check that the initializer is assignable to the enum type.
-                            checkTypeAssignableTo(checkExpression(initializer), enumType, initializer, /*headMessage*/ undefined);
-                        }
-                    }
-                    else if (enumIsConst) {
-                        if (isNaN(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN);
-                        }
-                        else if (!isFinite(value)) {
-                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
-                        }
-                    }
-                }
-                return value;
-                function evalConstant(e) {
-                    switch (e.kind) {
-                        case 185 /* PrefixUnaryExpression */:
-                            var value_1 = evalConstant(e.operand);
-                            if (value_1 === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operator) {
-                                case 35 /* PlusToken */: return value_1;
-                                case 36 /* MinusToken */: return -value_1;
-                                case 50 /* TildeToken */: return ~value_1;
-                            }
-                            return undefined;
-                        case 187 /* BinaryExpression */:
-                            var left = evalConstant(e.left);
-                            if (left === undefined) {
-                                return undefined;
-                            }
-                            var right = evalConstant(e.right);
-                            if (right === undefined) {
-                                return undefined;
-                            }
-                            switch (e.operatorToken.kind) {
-                                case 47 /* BarToken */: return left | right;
-                                case 46 /* AmpersandToken */: return left & right;
-                                case 44 /* GreaterThanGreaterThanToken */: return left >> right;
-                                case 45 /* GreaterThanGreaterThanGreaterThanToken */: return left >>> right;
-                                case 43 /* LessThanLessThanToken */: return left << right;
-                                case 48 /* CaretToken */: return left ^ right;
-                                case 37 /* AsteriskToken */: return left * right;
-                                case 39 /* SlashToken */: return left / right;
-                                case 35 /* PlusToken */: return left + right;
-                                case 36 /* MinusToken */: return left - right;
-                                case 40 /* PercentToken */: return left % right;
-                            }
-                            return undefined;
-                        case 8 /* NumericLiteral */:
-                            return +e.text;
-                        case 178 /* ParenthesizedExpression */:
-                            return evalConstant(e.expression);
-                        case 69 /* Identifier */:
-                        case 173 /* ElementAccessExpression */:
-                        case 172 /* PropertyAccessExpression */:
-                            var member = initializer.parent;
-                            var currentType = getTypeOfSymbol(getSymbolOfNode(member.parent));
-                            var enumType_1;
-                            var propertyName = void 0;
-                            if (e.kind === 69 /* Identifier */) {
-                                // unqualified names can refer to member that reside in different declaration of the enum so just doing name resolution won't work.
-                                // instead pick current enum type and later try to fetch member from the type
-                                enumType_1 = currentType;
-                                propertyName = e.text;
-                            }
-                            else {
-                                var expression = void 0;
-                                if (e.kind === 173 /* ElementAccessExpression */) {
-                                    if (e.argumentExpression === undefined ||
-                                        e.argumentExpression.kind !== 9 /* StringLiteral */) {
-                                        return undefined;
-                                    }
-                                    expression = e.expression;
-                                    propertyName = e.argumentExpression.text;
-                                }
-                                else {
-                                    expression = e.expression;
-                                    propertyName = e.name.text;
-                                }
-                                // expression part in ElementAccess\PropertyAccess should be either identifier or dottedName
-                                var current = expression;
-                                while (current) {
-                                    if (current.kind === 69 /* Identifier */) {
-                                        break;
-                                    }
-                                    else if (current.kind === 172 /* PropertyAccessExpression */) {
-                                        current = current.expression;
-                                    }
-                                    else {
-                                        return undefined;
-                                    }
-                                }
-                                enumType_1 = checkExpression(expression);
-                                // allow references to constant members of other enums
-                                if (!(enumType_1.symbol && (enumType_1.symbol.flags & 384 /* Enum */))) {
-                                    return undefined;
-                                }
-                            }
-                            if (propertyName === undefined) {
-                                return undefined;
-                            }
-                            var property = getPropertyOfObjectType(enumType_1, propertyName);
-                            if (!property || !(property.flags & 8 /* EnumMember */)) {
-                                return undefined;
-                            }
-                            var propertyDecl = property.valueDeclaration;
-                            // self references are illegal
-                            if (member === propertyDecl) {
-                                return undefined;
-                            }
-                            // illegal case: forward reference
-                            if (!isBlockScopedNameDeclaredBeforeUse(propertyDecl, member)) {
-                                reportError = false;
-                                error(e, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
-                                return undefined;
-                            }
-                            return getNodeLinks(propertyDecl).enumMemberValue;
-                    }
-                }
-            }
-        }
-        function checkEnumDeclaration(node) {
-            if (!produceDiagnostics) {
-                return;
-            }
-            // Grammar checking
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkExportsOnMergedDeclarations(node);
-            computeEnumMemberValues(node);
-            var enumIsConst = ts.isConst(node);
-            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
-                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
-            }
-            // Spec 2014 - Section 9.3:
-            // It isn't possible for one enum declaration to continue the automatic numbering sequence of another,
-            // and when an enum type has multiple declarations, only one declaration is permitted to omit a value
-            // for the first member.
-            //
-            // Only perform this check once per symbol
-            var enumSymbol = getSymbolOfNode(node);
-            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
-            if (node === firstDeclaration) {
-                if (enumSymbol.declarations.length > 1) {
-                    // check that const is placed\omitted on all enum declarations
-                    ts.forEach(enumSymbol.declarations, function (decl) {
-                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
-                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
-                        }
-                    });
-                }
-                var seenEnumMissingInitialInitializer_1 = false;
-                ts.forEach(enumSymbol.declarations, function (declaration) {
-                    // return true if we hit a violation of the rule, false otherwise
-                    if (declaration.kind !== 224 /* EnumDeclaration */) {
-                        return false;
-                    }
-                    var enumDeclaration = declaration;
-                    if (!enumDeclaration.members.length) {
-                        return false;
-                    }
-                    var firstEnumMember = enumDeclaration.members[0];
-                    if (!firstEnumMember.initializer) {
-                        if (seenEnumMissingInitialInitializer_1) {
-                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
-                        }
-                        else {
-                            seenEnumMissingInitialInitializer_1 = true;
-                        }
-                    }
-                });
-            }
-        }
-        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
-            var declarations = symbol.declarations;
-            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
-                var declaration = declarations_5[_i];
-                if ((declaration.kind === 221 /* ClassDeclaration */ ||
-                    (declaration.kind === 220 /* FunctionDeclaration */ && ts.nodeIsPresent(declaration.body))) &&
-                    !ts.isInAmbientContext(declaration)) {
-                    return declaration;
-                }
-            }
-            return undefined;
-        }
-        function inSameLexicalScope(node1, node2) {
-            var container1 = ts.getEnclosingBlockScopeContainer(node1);
-            var container2 = ts.getEnclosingBlockScopeContainer(node2);
-            if (isGlobalSourceFile(container1)) {
-                return isGlobalSourceFile(container2);
-            }
-            else if (isGlobalSourceFile(container2)) {
-                return false;
-            }
-            else {
-                return container1 === container2;
-            }
-        }
-        function checkModuleDeclaration(node) {
-            if (produceDiagnostics) {
-                // Grammar checking
-                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
-                var inAmbientContext = ts.isInAmbientContext(node);
-                if (isGlobalAugmentation && !inAmbientContext) {
-                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
-                }
-                var isAmbientExternalModule = ts.isAmbientModule(node);
-                var contextErrorMessage = isAmbientExternalModule
-                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
-                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
-                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
-                    // If we hit a module declaration in an illegal context, just bail out to avoid cascading errors.
-                    return;
-                }
-                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
-                    if (!inAmbientContext && node.name.kind === 9 /* StringLiteral */) {
-                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
-                    }
-                }
-                checkCollisionWithCapturedThisVariable(node, node.name);
-                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-                checkExportsOnMergedDeclarations(node);
-                var symbol = getSymbolOfNode(node);
-                // The following checks only apply on a non-ambient instantiated module declaration.
-                if (symbol.flags & 512 /* ValueModule */
-                    && symbol.declarations.length > 1
-                    && !inAmbientContext
-                    && ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
-                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
-                    if (firstNonAmbientClassOrFunc) {
-                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
-                        }
-                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
-                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
-                        }
-                    }
-                    // if the module merges with a class declaration in the same lexical scope,
-                    // we need to track this to ensure the correct emit.
-                    var mergedClass = ts.getDeclarationOfKind(symbol, 221 /* ClassDeclaration */);
-                    if (mergedClass &&
-                        inSameLexicalScope(node, mergedClass)) {
-                        getNodeLinks(node).flags |= 32768 /* LexicalModuleMergesWithClass */;
-                    }
-                }
-                if (isAmbientExternalModule) {
-                    if (ts.isExternalModuleAugmentation(node)) {
-                        // body of the augmentation should be checked for consistency only if augmentation was applied to its target (either global scope or module)
-                        // otherwise we'll be swamped in cascading errors.
-                        // We can detect if augmentation was applied using following rules:
-                        // - augmentation for a global scope is always applied
-                        // - augmentation for some external module is applied if symbol for augmentation is merged (it was combined with target module).
-                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432 /* Merged */);
-                        if (checkBody) {
-                            // body of ambient external module is always a module block
-                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
-                                var statement = _a[_i];
-                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
-                            }
-                        }
-                    }
-                    else if (isGlobalSourceFile(node.parent)) {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
-                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
-                        }
-                    }
-                    else {
-                        if (isGlobalAugmentation) {
-                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
-                        }
-                        else {
-                            // Node is not an augmentation and is not located on the script level.
-                            // This means that this is declaration of ambient module that is located in other module or namespace which is prohibited.
-                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
-                        }
-                    }
-                }
-            }
-            checkSourceElement(node.body);
-        }
-        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
-            switch (node.kind) {
-                case 200 /* VariableStatement */:
-                    // error each individual name in variable statement instead of marking the entire variable statement
-                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
-                        var decl = _a[_i];
-                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
-                    }
-                    break;
-                case 235 /* ExportAssignment */:
-                case 236 /* ExportDeclaration */:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
-                    break;
-                case 229 /* ImportEqualsDeclaration */:
-                case 230 /* ImportDeclaration */:
-                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
-                    break;
-                case 169 /* BindingElement */:
-                case 218 /* VariableDeclaration */:
-                    var name_18 = node.name;
-                    if (ts.isBindingPattern(name_18)) {
-                        for (var _b = 0, _c = name_18.elements; _b < _c.length; _b++) {
-                            var el = _c[_b];
-                            // mark individual names in binding pattern
-                            checkModuleAugmentationElement(el, isGlobalAugmentation);
-                        }
-                        break;
-                    }
-                // fallthrough
-                case 221 /* ClassDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 220 /* FunctionDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                    if (isGlobalAugmentation) {
-                        return;
-                    }
-                    var symbol = getSymbolOfNode(node);
-                    if (symbol) {
-                        // module augmentations cannot introduce new names on the top level scope of the module
-                        // this is done it two steps
-                        // 1. quick check - if symbol for node is not merged - this is local symbol to this augmentation - report error
-                        // 2. main check - report error if value declaration of the parent symbol is module augmentation)
-                        var reportError = !(symbol.flags & 33554432 /* Merged */);
-                        if (!reportError) {
-                            // symbol should not originate in augmentation
-                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
-                        }
-                    }
-                    break;
-            }
-        }
-        function getFirstIdentifier(node) {
-            while (true) {
-                if (node.kind === 139 /* QualifiedName */) {
-                    node = node.left;
-                }
-                else if (node.kind === 172 /* PropertyAccessExpression */) {
-                    node = node.expression;
-                }
-                else {
-                    break;
-                }
-            }
-            ts.Debug.assert(node.kind === 69 /* Identifier */);
-            return node;
-        }
-        function checkExternalImportOrExportDeclaration(node) {
-            var moduleName = ts.getExternalModuleName(node);
-            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9 /* StringLiteral */) {
-                error(moduleName, ts.Diagnostics.String_literal_expected);
-                return false;
-            }
-            var inAmbientExternalModule = node.parent.kind === 226 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
-            if (node.parent.kind !== 256 /* SourceFile */ && !inAmbientExternalModule) {
-                error(moduleName, node.kind === 236 /* ExportDeclaration */ ?
-                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
-                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
-                return false;
-            }
-            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
-                // we have already reported errors on top level imports\exports in external module augmentations in checkModuleDeclaration
-                // no need to do this again.
-                if (!isTopLevelInExternalModuleAugmentation(node)) {
-                    // TypeScript 1.0 spec (April 2013): 12.1.6
-                    // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference
-                    // other external modules only through top - level external module names.
-                    // Relative external module names are not permitted.
-                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
-                    return false;
-                }
-            }
-            return true;
-        }
-        function checkAliasSymbol(node) {
-            var symbol = getSymbolOfNode(node);
-            var target = resolveAlias(symbol);
-            if (target !== unknownSymbol) {
-                // For external modules symbol represent local symbol for an alias. 
-                // This local symbol will merge any other local declarations (excluding other aliases)
-                // and symbol.flags will contains combined representation for all merged declaration.
-                // Based on symbol.flags we can compute a set of excluded meanings (meaning that resolved alias should not have,
-                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export* 
-                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names). 
-                var excludedMeanings = (symbol.flags & (107455 /* Value */ | 1048576 /* ExportValue */) ? 107455 /* Value */ : 0) |
-                    (symbol.flags & 793056 /* Type */ ? 793056 /* Type */ : 0) |
-                    (symbol.flags & 1536 /* Namespace */ ? 1536 /* Namespace */ : 0);
-                if (target.flags & excludedMeanings) {
-                    var message = node.kind === 238 /* ExportSpecifier */ ?
-                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
-                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
-                    error(node, message, symbolToString(symbol));
-                }
-            }
-        }
-        function checkImportBinding(node) {
-            checkCollisionWithCapturedThisVariable(node, node.name);
-            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
-            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
-            checkAliasSymbol(node);
-        }
-        function checkImportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023 /* Modifier */)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
-            }
-            if (checkExternalImportOrExportDeclaration(node)) {
-                var importClause = node.importClause;
-                if (importClause) {
-                    if (importClause.name) {
-                        checkImportBinding(importClause);
-                    }
-                    if (importClause.namedBindings) {
-                        if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                            checkImportBinding(importClause.namedBindings);
-                        }
-                        else {
-                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
-                        }
-                    }
-                }
-            }
-        }
-        function checkImportEqualsDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
-                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            checkGrammarDecorators(node) || checkGrammarModifiers(node);
-            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
-                checkImportBinding(node);
-                if (node.flags & 1 /* Export */) {
-                    markExportAsReferenced(node);
-                }
-                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                    var target = resolveAlias(getSymbolOfNode(node));
-                    if (target !== unknownSymbol) {
-                        if (target.flags & 107455 /* Value */) {
-                            // Target is a value symbol, check that it is not hidden by a local declaration with the same name
-                            var moduleName = getFirstIdentifier(node.moduleReference);
-                            if (!(resolveEntityName(moduleName, 107455 /* Value */ | 1536 /* Namespace */).flags & 1536 /* Namespace */)) {
-                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
-                            }
-                        }
-                        if (target.flags & 793056 /* Type */) {
-                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
-                        }
-                    }
-                }
-                else {
-                    if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
-                        // Import equals declaration is deprecated in es6 or above
-                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
-                    }
-                }
-            }
-        }
-        function checkExportDeclaration(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
-                // If we hit an export in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023 /* Modifier */)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
-            }
-            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
-                if (node.exportClause) {
-                    // export { x, y }
-                    // export { x, y } from "foo"
-                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
-                    var inAmbientExternalModule = node.parent.kind === 226 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
-                    if (node.parent.kind !== 256 /* SourceFile */ && !inAmbientExternalModule) {
-                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
-                    }
-                }
-                else {
-                    // export * from "foo"
-                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
-                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
-                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
-                    }
-                }
-            }
-        }
-        function checkGrammarModuleElementContext(node, errorMessage) {
-            if (node.parent.kind !== 256 /* SourceFile */ && node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 225 /* ModuleDeclaration */) {
-                return grammarErrorOnFirstToken(node, errorMessage);
-            }
-        }
-        function checkExportSpecifier(node) {
-            checkAliasSymbol(node);
-            if (!node.parent.parent.moduleSpecifier) {
-                var exportedName = node.propertyName || node.name;
-                // find immediate value referenced by exported name (SymbolFlags.Alias is set so we don't chase down aliases)
-                var symbol = resolveName(exportedName, exportedName.text, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */, 
-                /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
-                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
-                }
-                else {
-                    markExportAsReferenced(node);
-                }
-            }
-        }
-        function checkExportAssignment(node) {
-            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
-                // If we hit an export assignment in an illegal context, just bail out to avoid cascading errors.
-                return;
-            }
-            var container = node.parent.kind === 256 /* SourceFile */ ? node.parent : node.parent.parent;
-            if (container.kind === 225 /* ModuleDeclaration */ && !ts.isAmbientModule(container)) {
-                error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
-                return;
-            }
-            // Grammar checking
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023 /* Modifier */)) {
-                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
-            }
-            if (node.expression.kind === 69 /* Identifier */) {
-                markExportAsReferenced(node);
-            }
-            else {
-                checkExpressionCached(node.expression);
-            }
-            checkExternalModuleExports(container);
-            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
-                if (modulekind === ts.ModuleKind.ES6) {
-                    // export assignment is not supported in es6 modules
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
-                }
-                else if (modulekind === ts.ModuleKind.System) {
-                    // system modules does not support export assignment
-                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
-                }
-            }
-        }
-        function hasExportedMembers(moduleSymbol) {
-            for (var id in moduleSymbol.exports) {
-                if (id !== "export=") {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function checkExternalModuleExports(node) {
-            var moduleSymbol = getSymbolOfNode(node);
-            var links = getSymbolLinks(moduleSymbol);
-            if (!links.exportsChecked) {
-                var exportEqualsSymbol = moduleSymbol.exports["export="];
-                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
-                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
-                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
-                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
-                    }
-                }
-                // Checks for export * conflicts
-                var exports = getExportsOfModule(moduleSymbol);
-                for (var id in exports) {
-                    if (id === "__export") {
-                        continue;
-                    }
-                    var _a = exports[id], declarations = _a.declarations, flags = _a.flags;
-                    // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries. 
-                    // (TS Exceptions: namespaces, function overloads, enums, and interfaces)
-                    if (flags & (1536 /* Namespace */ | 64 /* Interface */ | 384 /* Enum */)) {
-                        continue;
-                    }
-                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
-                    if (flags & 524288 /* TypeAlias */ && exportedDeclarationsCount <= 2) {
-                        // it is legal to merge type alias with other values
-                        // so count should be either 1 (just type alias) or 2 (type alias + merged value)
-                        continue;
-                    }
-                    if (exportedDeclarationsCount > 1) {
-                        for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
-                            var declaration = declarations_6[_i];
-                            if (isNotOverload(declaration)) {
-                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
-                            }
-                        }
-                    }
-                }
-                links.exportsChecked = true;
-            }
-            function isNotOverload(declaration) {
-                return declaration.kind !== 220 /* FunctionDeclaration */ || !!declaration.body;
-            }
-        }
-        function checkSourceElement(node) {
-            if (!node) {
-                return;
-            }
-            var kind = node.kind;
-            if (cancellationToken) {
-                // Only bother checking on a few construct kinds.  We don't want to be excessively
-                // hitting the cancellation token on every node we check.
-                switch (kind) {
-                    case 225 /* ModuleDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                        cancellationToken.throwIfCancellationRequested();
-                }
-            }
-            switch (kind) {
-                case 141 /* TypeParameter */:
-                    return checkTypeParameter(node);
-                case 142 /* Parameter */:
-                    return checkParameter(node);
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    return checkPropertyDeclaration(node);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                case 151 /* CallSignature */:
-                case 152 /* ConstructSignature */:
-                    return checkSignatureDeclaration(node);
-                case 153 /* IndexSignature */:
-                    return checkSignatureDeclaration(node);
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    return checkMethodDeclaration(node);
-                case 148 /* Constructor */:
-                    return checkConstructorDeclaration(node);
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return checkAccessorDeclaration(node);
-                case 155 /* TypeReference */:
-                    return checkTypeReferenceNode(node);
-                case 154 /* TypePredicate */:
-                    return checkTypePredicate(node);
-                case 158 /* TypeQuery */:
-                    return checkTypeQuery(node);
-                case 159 /* TypeLiteral */:
-                    return checkTypeLiteral(node);
-                case 160 /* ArrayType */:
-                    return checkArrayType(node);
-                case 161 /* TupleType */:
-                    return checkTupleType(node);
-                case 162 /* UnionType */:
-                case 163 /* IntersectionType */:
-                    return checkUnionOrIntersectionType(node);
-                case 164 /* ParenthesizedType */:
-                    return checkSourceElement(node.type);
-                case 220 /* FunctionDeclaration */:
-                    return checkFunctionDeclaration(node);
-                case 199 /* Block */:
-                case 226 /* ModuleBlock */:
-                    return checkBlock(node);
-                case 200 /* VariableStatement */:
-                    return checkVariableStatement(node);
-                case 202 /* ExpressionStatement */:
-                    return checkExpressionStatement(node);
-                case 203 /* IfStatement */:
-                    return checkIfStatement(node);
-                case 204 /* DoStatement */:
-                    return checkDoStatement(node);
-                case 205 /* WhileStatement */:
-                    return checkWhileStatement(node);
-                case 206 /* ForStatement */:
-                    return checkForStatement(node);
-                case 207 /* ForInStatement */:
-                    return checkForInStatement(node);
-                case 208 /* ForOfStatement */:
-                    return checkForOfStatement(node);
-                case 209 /* ContinueStatement */:
-                case 210 /* BreakStatement */:
-                    return checkBreakOrContinueStatement(node);
-                case 211 /* ReturnStatement */:
-                    return checkReturnStatement(node);
-                case 212 /* WithStatement */:
-                    return checkWithStatement(node);
-                case 213 /* SwitchStatement */:
-                    return checkSwitchStatement(node);
-                case 214 /* LabeledStatement */:
-                    return checkLabeledStatement(node);
-                case 215 /* ThrowStatement */:
-                    return checkThrowStatement(node);
-                case 216 /* TryStatement */:
-                    return checkTryStatement(node);
-                case 218 /* VariableDeclaration */:
-                    return checkVariableDeclaration(node);
-                case 169 /* BindingElement */:
-                    return checkBindingElement(node);
-                case 221 /* ClassDeclaration */:
-                    return checkClassDeclaration(node);
-                case 222 /* InterfaceDeclaration */:
-                    return checkInterfaceDeclaration(node);
-                case 223 /* TypeAliasDeclaration */:
-                    return checkTypeAliasDeclaration(node);
-                case 224 /* EnumDeclaration */:
-                    return checkEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
-                    return checkModuleDeclaration(node);
-                case 230 /* ImportDeclaration */:
-                    return checkImportDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
-                    return checkImportEqualsDeclaration(node);
-                case 236 /* ExportDeclaration */:
-                    return checkExportDeclaration(node);
-                case 235 /* ExportAssignment */:
-                    return checkExportAssignment(node);
-                case 201 /* EmptyStatement */:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 217 /* DebuggerStatement */:
-                    checkGrammarStatementInAmbientContext(node);
-                    return;
-                case 239 /* MissingDeclaration */:
-                    return checkMissingDeclaration(node);
-            }
-        }
-        // Function and class expression bodies are checked after all statements in the enclosing body. This is
-        // to ensure constructs like the following are permitted:
-        //     const foo = function () {
-        //        const s = foo();
-        //        return "hello";
-        //     }
-        // Here, performing a full type check of the body of the function expression whilst in the process of
-        // determining the type of foo would cause foo to be given type any because of the recursive reference.
-        // Delaying the type check of the body ensures foo has been assigned a type.
-        function checkNodeDeferred(node) {
-            if (deferredNodes) {
-                deferredNodes.push(node);
-            }
-        }
-        function checkDeferredNodes() {
-            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
-                var node = deferredNodes_1[_i];
-                switch (node.kind) {
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
-                        break;
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        checkAccessorDeferred(node);
-                        break;
-                    case 192 /* ClassExpression */:
-                        checkClassExpressionDeferred(node);
-                        break;
-                }
-            }
-        }
-        function checkSourceFile(node) {
-            var start = new Date().getTime();
-            checkSourceFileWorker(node);
-            ts.checkTime += new Date().getTime() - start;
-        }
-        // Fully type check a source file and collect the relevant diagnostics.
-        function checkSourceFileWorker(node) {
-            var links = getNodeLinks(node);
-            if (!(links.flags & 1 /* TypeChecked */)) {
-                // If skipLibCheck is enabled, skip type checking if file is a declaration file.
-                // If skipDefaultLibCheck is enabled, skip type checking if file contains a
-                // '/// <reference no-default-lib="true"/>' directive.
-                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
-                    return;
-                }
-                // Grammar checking
-                checkGrammarSourceFile(node);
-                potentialThisCollisions.length = 0;
-                deferredNodes = [];
-                ts.forEach(node.statements, checkSourceElement);
-                checkDeferredNodes();
-                deferredNodes = undefined;
-                if (ts.isExternalOrCommonJsModule(node)) {
-                    checkExternalModuleExports(node);
-                }
-                if (potentialThisCollisions.length) {
-                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
-                    potentialThisCollisions.length = 0;
-                }
-                links.flags |= 1 /* TypeChecked */;
-            }
-        }
-        function getDiagnostics(sourceFile, ct) {
-            try {
-                // Record the cancellation token so it can be checked later on during checkSourceElement.
-                // Do this in a finally block so we can ensure that it gets reset back to nothing after
-                // this call is done.
-                cancellationToken = ct;
-                return getDiagnosticsWorker(sourceFile);
-            }
-            finally {
-                cancellationToken = undefined;
-            }
-        }
-        function getDiagnosticsWorker(sourceFile) {
-            throwIfNonDiagnosticsProducing();
-            if (sourceFile) {
-                checkSourceFile(sourceFile);
-                return diagnostics.getDiagnostics(sourceFile.fileName);
-            }
-            ts.forEach(host.getSourceFiles(), checkSourceFile);
-            return diagnostics.getDiagnostics();
-        }
-        function getGlobalDiagnostics() {
-            throwIfNonDiagnosticsProducing();
-            return diagnostics.getGlobalDiagnostics();
-        }
-        function throwIfNonDiagnosticsProducing() {
-            if (!produceDiagnostics) {
-                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
-            }
-        }
-        // Language service support
-        function isInsideWithStatementBody(node) {
-            if (node) {
-                while (node.parent) {
-                    if (node.parent.kind === 212 /* WithStatement */ && node.parent.statement === node) {
-                        return true;
-                    }
-                    node = node.parent;
-                }
-            }
-            return false;
-        }
-        function getSymbolsInScope(location, meaning) {
-            var symbols = {};
-            var memberFlags = 0;
-            if (isInsideWithStatementBody(location)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return [];
-            }
-            populateSymbols();
-            return symbolsToArray(symbols);
-            function populateSymbols() {
-                while (location) {
-                    if (location.locals && !isGlobalSourceFile(location)) {
-                        copySymbols(location.locals, meaning);
-                    }
-                    switch (location.kind) {
-                        case 256 /* SourceFile */:
-                            if (!ts.isExternalOrCommonJsModule(location)) {
-                                break;
-                            }
-                        case 225 /* ModuleDeclaration */:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931 /* ModuleMember */);
-                            break;
-                        case 224 /* EnumDeclaration */:
-                            copySymbols(getSymbolOfNode(location).exports, meaning & 8 /* EnumMember */);
-                            break;
-                        case 192 /* ClassExpression */:
-                            var className = location.name;
-                            if (className) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                        // fall through; this fall-through is necessary because we would like to handle
-                        // type parameter inside class expression similar to how we handle it in classDeclaration and interface Declaration
-                        case 221 /* ClassDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                            // If we didn't come from static member of class or interface,
-                            // add the type parameters into the symbol table
-                            // (type parameters of classDeclaration/classExpression and interface are in member property of the symbol.
-                            // Note: that the memberFlags come from previous iteration.
-                            if (!(memberFlags & 32 /* Static */)) {
-                                copySymbols(getSymbolOfNode(location).members, meaning & 793056 /* Type */);
-                            }
-                            break;
-                        case 179 /* FunctionExpression */:
-                            var funcName = location.name;
-                            if (funcName) {
-                                copySymbol(location.symbol, meaning);
-                            }
-                            break;
-                    }
-                    if (ts.introducesArgumentsExoticObject(location)) {
-                        copySymbol(argumentsSymbol, meaning);
-                    }
-                    memberFlags = location.flags;
-                    location = location.parent;
-                }
-                copySymbols(globals, meaning);
-            }
-            /**
-             * Copy the given symbol into symbol tables if the symbol has the given meaning
-             * and it doesn't already existed in the symbol table
-             * @param key a key for storing in symbol table; if undefined, use symbol.name
-             * @param symbol the symbol to be added into symbol table
-             * @param meaning meaning of symbol to filter by before adding to symbol table
-             */
-            function copySymbol(symbol, meaning) {
-                if (symbol.flags & meaning) {
-                    var id = symbol.name;
-                    // We will copy all symbol regardless of its reserved name because
-                    // symbolsToArray will check whether the key is a reserved name and
-                    // it will not copy symbol with reserved name to the array
-                    if (!ts.hasProperty(symbols, id)) {
-                        symbols[id] = symbol;
-                    }
-                }
-            }
-            function copySymbols(source, meaning) {
-                if (meaning) {
-                    for (var id in source) {
-                        var symbol = source[id];
-                        copySymbol(symbol, meaning);
-                    }
-                }
-            }
-        }
-        function isTypeDeclarationName(name) {
-            return name.kind === 69 /* Identifier */ &&
-                isTypeDeclaration(name.parent) &&
-                name.parent.name === name;
-        }
-        function isTypeDeclaration(node) {
-            switch (node.kind) {
-                case 141 /* TypeParameter */:
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 224 /* EnumDeclaration */:
-                    return true;
-            }
-        }
-        // True if the given identifier is part of a type reference
-        function isTypeReferenceIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 139 /* QualifiedName */) {
-                node = node.parent;
-            }
-            return node.parent && node.parent.kind === 155 /* TypeReference */;
-        }
-        function isHeritageClauseElementIdentifier(entityName) {
-            var node = entityName;
-            while (node.parent && node.parent.kind === 172 /* PropertyAccessExpression */) {
-                node = node.parent;
-            }
-            return node.parent && node.parent.kind === 194 /* ExpressionWithTypeArguments */;
-        }
-        function forEachEnclosingClass(node, callback) {
-            var result;
-            while (true) {
-                node = ts.getContainingClass(node);
-                if (!node)
-                    break;
-                if (result = callback(node))
-                    break;
-            }
-            return result;
-        }
-        function isNodeWithinClass(node, classDeclaration) {
-            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
-        }
-        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
-            while (nodeOnRightSide.parent.kind === 139 /* QualifiedName */) {
-                nodeOnRightSide = nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 229 /* ImportEqualsDeclaration */) {
-                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
-            }
-            if (nodeOnRightSide.parent.kind === 235 /* ExportAssignment */) {
-                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
-            }
-            return undefined;
-        }
-        function isInRightSideOfImportOrExportAssignment(node) {
-            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
-        }
-        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
-            if (ts.isDeclarationName(entityName)) {
-                return getSymbolOfNode(entityName.parent);
-            }
-            if (ts.isInJavaScriptFile(entityName) && entityName.parent.kind === 172 /* PropertyAccessExpression */) {
-                var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
-                switch (specialPropertyAssignmentKind) {
-                    case 1 /* ExportsProperty */:
-                    case 3 /* PrototypeProperty */:
-                        return getSymbolOfNode(entityName.parent);
-                    case 4 /* ThisProperty */:
-                    case 2 /* ModuleExports */:
-                        return getSymbolOfNode(entityName.parent.parent);
-                    default:
-                }
-            }
-            if (entityName.parent.kind === 235 /* ExportAssignment */) {
-                return resolveEntityName(entityName, 
-                /*all meanings*/ 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */);
-            }
-            if (entityName.kind !== 172 /* PropertyAccessExpression */) {
-                if (isInRightSideOfImportOrExportAssignment(entityName)) {
-                    // Since we already checked for ExportAssignment, this really could only be an Import
-                    return getSymbolOfPartOfRightHandSideOfImportEquals(entityName);
-                }
-            }
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
-                entityName = entityName.parent;
-            }
-            if (isHeritageClauseElementIdentifier(entityName)) {
-                var meaning = 0 /* None */;
-                // In an interface or class, we're definitely interested in a type.
-                if (entityName.parent.kind === 194 /* ExpressionWithTypeArguments */) {
-                    meaning = 793056 /* Type */;
-                    // In a class 'extends' clause we are also looking for a value.
-                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
-                        meaning |= 107455 /* Value */;
-                    }
-                }
-                else {
-                    meaning = 1536 /* Namespace */;
-                }
-                meaning |= 8388608 /* Alias */;
-                return resolveEntityName(entityName, meaning);
-            }
-            else if (ts.isExpression(entityName)) {
-                if (ts.nodeIsMissing(entityName)) {
-                    // Missing entity name.
-                    return undefined;
-                }
-                if (entityName.kind === 69 /* Identifier */) {
-                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
-                        return getIntrinsicTagSymbol(entityName.parent);
-                    }
-                    // Include aliases in the meaning, this ensures that we do not follow aliases to where they point and instead
-                    // return the alias symbol.
-                    var meaning = 107455 /* Value */ | 8388608 /* Alias */;
-                    return resolveEntityName(entityName, meaning);
-                }
-                else if (entityName.kind === 172 /* PropertyAccessExpression */) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkPropertyAccessExpression(entityName);
-                    }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
-                else if (entityName.kind === 139 /* QualifiedName */) {
-                    var symbol = getNodeLinks(entityName).resolvedSymbol;
-                    if (!symbol) {
-                        checkQualifiedName(entityName);
-                    }
-                    return getNodeLinks(entityName).resolvedSymbol;
-                }
-            }
-            else if (isTypeReferenceIdentifier(entityName)) {
-                var meaning = entityName.parent.kind === 155 /* TypeReference */ ? 793056 /* Type */ : 1536 /* Namespace */;
-                // Include aliases in the meaning, this ensures that we do not follow aliases to where they point and instead
-                // return the alias symbol.
-                meaning |= 8388608 /* Alias */;
-                return resolveEntityName(entityName, meaning);
-            }
-            else if (entityName.parent.kind === 246 /* JsxAttribute */) {
-                return getJsxAttributePropertySymbol(entityName.parent);
-            }
-            if (entityName.parent.kind === 154 /* TypePredicate */) {
-                return resolveEntityName(entityName, /*meaning*/ 1 /* FunctionScopedVariable */);
-            }
-            // Do we want to return undefined here?
-            return undefined;
-        }
-        function getSymbolAtLocation(node) {
-            if (node.kind === 256 /* SourceFile */) {
-                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
-            }
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return undefined;
-            }
-            if (ts.isDeclarationName(node)) {
-                // This is a declaration, call getSymbolOfNode
-                return getSymbolOfNode(node.parent);
-            }
-            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
-                return getSymbolOfNode(node.parent.parent);
-            }
-            if (node.kind === 69 /* Identifier */) {
-                if (isInRightSideOfImportOrExportAssignment(node)) {
-                    return node.parent.kind === 235 /* ExportAssignment */
-                        ? getSymbolOfEntityNameOrPropertyAccessExpression(node)
-                        : getSymbolOfPartOfRightHandSideOfImportEquals(node);
-                }
-                else if (node.parent.kind === 169 /* BindingElement */ &&
-                    node.parent.parent.kind === 167 /* ObjectBindingPattern */ &&
-                    node === node.parent.propertyName) {
-                    var typeOfPattern = getTypeOfNode(node.parent.parent);
-                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
-                    if (propertyDeclaration) {
-                        return propertyDeclaration;
-                    }
-                }
-            }
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                case 172 /* PropertyAccessExpression */:
-                case 139 /* QualifiedName */:
-                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
-                case 97 /* ThisKeyword */:
-                case 95 /* SuperKeyword */:
-                    var type = ts.isExpression(node) ? checkExpression(node) : getTypeFromTypeNode(node);
-                    return type.symbol;
-                case 165 /* ThisType */:
-                    return getTypeFromTypeNode(node).symbol;
-                case 121 /* ConstructorKeyword */:
-                    // constructor keyword for an overload, should take us to the definition if it exist
-                    var constructorDeclaration = node.parent;
-                    if (constructorDeclaration && constructorDeclaration.kind === 148 /* Constructor */) {
-                        return constructorDeclaration.parent.symbol;
-                    }
-                    return undefined;
-                case 9 /* StringLiteral */:
-                    // External module name in an import declaration
-                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
-                        ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
-                        ((node.parent.kind === 230 /* ImportDeclaration */ || node.parent.kind === 236 /* ExportDeclaration */) &&
-                            node.parent.moduleSpecifier === node)) {
-                        return resolveExternalModuleName(node, node);
-                    }
-                // Fall through
-                case 8 /* NumericLiteral */:
-                    // index access
-                    if (node.parent.kind === 173 /* ElementAccessExpression */ && node.parent.argumentExpression === node) {
-                        var objectType = checkExpression(node.parent.expression);
-                        if (objectType === unknownType)
-                            return undefined;
-                        var apparentType = getApparentType(objectType);
-                        if (apparentType === unknownType)
-                            return undefined;
-                        return getPropertyOfType(apparentType, node.text);
-                    }
-                    break;
-            }
-            return undefined;
-        }
-        function getShorthandAssignmentValueSymbol(location) {
-            // The function returns a value symbol of an identifier in the short-hand property assignment.
-            // This is necessary as an identifier in short-hand property assignment can contains two meaning:
-            // property name and property value.
-            if (location && location.kind === 254 /* ShorthandPropertyAssignment */) {
-                return resolveEntityName(location.name, 107455 /* Value */ | 8388608 /* Alias */);
-            }
-            return undefined;
-        }
-        /** Returns the target of an export specifier without following aliases */
-        function getExportSpecifierLocalTargetSymbol(node) {
-            return node.parent.parent.moduleSpecifier ?
-                getExternalModuleMember(node.parent.parent, node) :
-                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */);
-        }
-        function getTypeOfNode(node) {
-            if (isInsideWithStatementBody(node)) {
-                // We cannot answer semantic questions within a with block, do not proceed any further
-                return unknownType;
-            }
-            if (ts.isTypeNode(node)) {
-                return getTypeFromTypeNode(node);
-            }
-            if (ts.isExpression(node)) {
-                return getTypeOfExpression(node);
-            }
-            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
-                // A SyntaxKind.ExpressionWithTypeArguments is considered a type node, except when it occurs in the
-                // extends clause of a class. We handle that case here.
-                return getBaseTypes(getDeclaredTypeOfSymbol(getSymbolOfNode(node.parent.parent)))[0];
-            }
-            if (isTypeDeclaration(node)) {
-                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
-                var symbol = getSymbolOfNode(node);
-                return getDeclaredTypeOfSymbol(symbol);
-            }
-            if (isTypeDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getDeclaredTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclaration(node)) {
-                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
-                var symbol = getSymbolOfNode(node);
-                return getTypeOfSymbol(symbol);
-            }
-            if (ts.isDeclarationName(node)) {
-                var symbol = getSymbolAtLocation(node);
-                return symbol && getTypeOfSymbol(symbol);
-            }
-            if (ts.isBindingPattern(node)) {
-                return getTypeForVariableLikeDeclaration(node.parent, /*includeOptionality*/ true);
-            }
-            if (isInRightSideOfImportOrExportAssignment(node)) {
-                var symbol = getSymbolAtLocation(node);
-                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
-                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
-            }
-            return unknownType;
-        }
-        // Gets the type of object literal or array literal of destructuring assignment.
-        // { a } from 
-        //     for ( { a } of elems) {
-        //     }
-        // [ a ] from 
-        //     [a] = [ some array ...]
-        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
-            ts.Debug.assert(expr.kind === 171 /* ObjectLiteralExpression */ || expr.kind === 170 /* ArrayLiteralExpression */);
-            // If this is from "for of"
-            //     for ( { a } of elems) {
-            //     }
-            if (expr.parent.kind === 208 /* ForOfStatement */) {
-                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
-            }
-            // If this is from "for" initializer
-            //     for ({a } = elems[0];.....) { }
-            if (expr.parent.kind === 187 /* BinaryExpression */) {
-                var iteratedType = checkExpression(expr.parent.right);
-                return checkDestructuringAssignment(expr, iteratedType || unknownType);
-            }
-            // If this is from nested object binding pattern
-            //     for ({ skills: { primary, secondary } } = multiRobot, i = 0; i < 1; i++) {
-            if (expr.parent.kind === 253 /* PropertyAssignment */) {
-                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
-                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
-            }
-            // Array literal assignment - array destructuring pattern
-            ts.Debug.assert(expr.parent.kind === 170 /* ArrayLiteralExpression */);
-            //    [{ property1: p1, property2 }] = elems;
-            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
-            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, /*allowStringInput*/ false) || unknownType;
-            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
-        }
-        // Gets the property symbol corresponding to the property in destructuring assignment
-        // 'property1' from 
-        //     for ( { property1: a } of elems) {
-        //     }
-        // 'property1' at location 'a' from: 
-        //     [a] = [ property1, property2 ]
-        function getPropertySymbolOfDestructuringAssignment(location) {
-            // Get the type of the object or array literal and then look for property of given name in the type
-            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
-            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
-        }
-        function getTypeOfExpression(expr) {
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
-                expr = expr.parent;
-            }
-            return checkExpression(expr);
-        }
-        /**
-          * Gets either the static or instance type of a class element, based on
-          * whether the element is declared as "static".
-          */
-        function getParentTypeOfClassElement(node) {
-            var classSymbol = getSymbolOfNode(node.parent);
-            return node.flags & 32 /* Static */
-                ? getTypeOfSymbol(classSymbol)
-                : getDeclaredTypeOfSymbol(classSymbol);
-        }
-        // Return the list of properties of the given type, augmented with properties from Function
-        // if the type has call or construct signatures
-        function getAugmentedPropertiesOfType(type) {
-            type = getApparentType(type);
-            var propsByName = createSymbolTable(getPropertiesOfType(type));
-            if (getSignaturesOfType(type, 0 /* Call */).length || getSignaturesOfType(type, 1 /* Construct */).length) {
-                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
-                    if (!ts.hasProperty(propsByName, p.name)) {
-                        propsByName[p.name] = p;
-                    }
-                });
-            }
-            return getNamedMembers(propsByName);
-        }
-        function getRootSymbols(symbol) {
-            if (symbol.flags & 268435456 /* SyntheticProperty */) {
-                var symbols_3 = [];
-                var name_19 = symbol.name;
-                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
-                    var symbol = getPropertyOfType(t, name_19);
-                    if (symbol) {
-                        symbols_3.push(symbol);
-                    }
-                });
-                return symbols_3;
-            }
-            else if (symbol.flags & 67108864 /* Transient */) {
-                var target = void 0;
-                var next = symbol;
-                while (next = getSymbolLinks(next).target) {
-                    target = next;
-                }
-                if (target) {
-                    return [target];
-                }
-            }
-            return [symbol];
-        }
-        // Emitter support
-        function isArgumentsLocalBinding(node) {
-            return getReferencedValueSymbol(node) === argumentsSymbol;
-        }
-        function moduleExportsSomeValue(moduleReferenceExpression) {
-            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
-            if (!moduleSymbol) {
-                // module not found - be conservative
-                return true;
-            }
-            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
-            // if module has export assignment then 'resolveExternalModuleSymbol' will return resolved symbol for export assignment
-            // otherwise it will return moduleSymbol itself
-            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
-            var symbolLinks = getSymbolLinks(moduleSymbol);
-            if (symbolLinks.exportsSomeValue === undefined) {
-                // for export assignments - check if resolved symbol for RHS is itself a value
-                // otherwise - check if at least one export is value
-                symbolLinks.exportsSomeValue = hasExportAssignment
-                    ? !!(moduleSymbol.flags & 107455 /* Value */)
-                    : ts.forEachValue(getExportsOfModule(moduleSymbol), isValue);
-            }
-            return symbolLinks.exportsSomeValue;
-            function isValue(s) {
-                s = resolveSymbol(s);
-                return s && !!(s.flags & 107455 /* Value */);
-            }
-        }
-        // When resolved as an expression identifier, if the given node references an exported entity, return the declaration
-        // node of the exported entity's container. Otherwise, return undefined.
-        function getReferencedExportContainer(node) {
-            var symbol = getReferencedValueSymbol(node);
-            if (symbol) {
-                if (symbol.flags & 1048576 /* ExportValue */) {
-                    // If we reference an exported entity within the same module declaration, then whether
-                    // we prefix depends on the kind of entity. SymbolFlags.ExportHasLocal encompasses all the
-                    // kinds that we do NOT prefix.
-                    var exportSymbol = getMergedSymbol(symbol.exportSymbol);
-                    if (exportSymbol.flags & 944 /* ExportHasLocal */) {
-                        return undefined;
-                    }
-                    symbol = exportSymbol;
-                }
-                var parentSymbol = getParentOfSymbol(symbol);
-                if (parentSymbol) {
-                    if (parentSymbol.flags & 512 /* ValueModule */ && parentSymbol.valueDeclaration.kind === 256 /* SourceFile */) {
-                        return parentSymbol.valueDeclaration;
-                    }
-                    for (var n = node.parent; n; n = n.parent) {
-                        if ((n.kind === 225 /* ModuleDeclaration */ || n.kind === 224 /* EnumDeclaration */) && getSymbolOfNode(n) === parentSymbol) {
-                            return n;
-                        }
-                    }
-                }
-            }
-        }
-        // When resolved as an expression identifier, if the given node references an import, return the declaration of
-        // that import. Otherwise, return undefined.
-        function getReferencedImportDeclaration(node) {
-            var symbol = getReferencedValueSymbol(node);
-            return symbol && symbol.flags & 8388608 /* Alias */ ? getDeclarationOfAliasSymbol(symbol) : undefined;
-        }
-        function isSymbolOfDeclarationWithCollidingName(symbol) {
-            if (symbol.flags & 418 /* BlockScoped */) {
-                var links = getSymbolLinks(symbol);
-                if (links.isDeclarationWithCollidingName === undefined) {
-                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
-                    if (ts.isStatementWithLocals(container)) {
-                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
-                        if (!!resolveName(container.parent, symbol.name, 107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined)) {
-                            // redeclaration - always should be renamed
-                            links.isDeclarationWithCollidingName = true;
-                        }
-                        else if (nodeLinks_1.flags & 131072 /* CapturedBlockScopedBinding */) {
-                            // binding is captured in the function
-                            // should be renamed if:
-                            // - binding is not top level - top level bindings never collide with anything
-                            // AND
-                            //   - binding is not declared in loop, should be renamed to avoid name reuse across siblings
-                            //     let a, b
-                            //     { let x = 1; a = () => x;  }
-                            //     { let x = 100; b = () => x; }
-                            //     console.log(a()); // should print '1'
-                            //     console.log(b()); // should print '100'
-                            //     OR
-                            //   - binding is declared inside loop but not in inside initializer of iteration statement or directly inside loop body
-                            //     * variables from initializer are passed to rewritten loop body as parameters so they are not captured directly
-                            //     * variables that are declared immediately in loop body will become top level variable after loop is rewritten and thus
-                            //       they will not collide with anything
-                            var isDeclaredInLoop = nodeLinks_1.flags & 262144 /* BlockScopedBindingInLoop */;
-                            var inLoopInitializer = ts.isIterationStatement(container, /*lookInLabeledStatements*/ false);
-                            var inLoopBodyBlock = container.kind === 199 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false);
-                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
-                        }
-                        else {
-                            links.isDeclarationWithCollidingName = false;
-                        }
-                    }
-                }
-                return links.isDeclarationWithCollidingName;
-            }
-            return false;
-        }
-        // When resolved as an expression identifier, if the given node references a nested block scoped entity with
-        // a name that either hides an existing name or might hide it when compiled downlevel,
-        // return the declaration of that entity. Otherwise, return undefined.
-        function getReferencedDeclarationWithCollidingName(node) {
-            var symbol = getReferencedValueSymbol(node);
-            return symbol && isSymbolOfDeclarationWithCollidingName(symbol) ? symbol.valueDeclaration : undefined;
-        }
-        // Return true if the given node is a declaration of a nested block scoped entity with a name that either hides an
-        // existing name or might hide a name when compiled downlevel
-        function isDeclarationWithCollidingName(node) {
-            return isSymbolOfDeclarationWithCollidingName(getSymbolOfNode(node));
-        }
-        function isValueAliasDeclaration(node) {
-            switch (node.kind) {
-                case 229 /* ImportEqualsDeclaration */:
-                case 231 /* ImportClause */:
-                case 232 /* NamespaceImport */:
-                case 234 /* ImportSpecifier */:
-                case 238 /* ExportSpecifier */:
-                    return isAliasResolvedToValue(getSymbolOfNode(node));
-                case 236 /* ExportDeclaration */:
-                    var exportClause = node.exportClause;
-                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
-                case 235 /* ExportAssignment */:
-                    return node.expression && node.expression.kind === 69 /* Identifier */ ? isAliasResolvedToValue(getSymbolOfNode(node)) : true;
-            }
-            return false;
-        }
-        function isTopLevelValueImportEqualsWithEntityName(node) {
-            if (node.parent.kind !== 256 /* SourceFile */ || !ts.isInternalModuleImportEqualsDeclaration(node)) {
-                // parent is not source file or it is not reference to internal module
-                return false;
-            }
-            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
-            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
-        }
-        function isAliasResolvedToValue(symbol) {
-            var target = resolveAlias(symbol);
-            if (target === unknownSymbol) {
-                return true;
-            }
-            // const enums and modules that contain only const enums are not considered values from the emit perspective
-            // unless 'preserveConstEnums' option is set to true
-            return target.flags & 107455 /* Value */ &&
-                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
-        }
-        function isConstEnumOrConstEnumOnlyModule(s) {
-            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
-        }
-        function isReferencedAliasDeclaration(node, checkChildren) {
-            if (ts.isAliasSymbolDeclaration(node)) {
-                var symbol = getSymbolOfNode(node);
-                if (getSymbolLinks(symbol).referenced) {
-                    return true;
-                }
-            }
-            if (checkChildren) {
-                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
-            }
-            return false;
-        }
-        function isImplementationOfOverload(node) {
-            if (ts.nodeIsPresent(node.body)) {
-                var symbol = getSymbolOfNode(node);
-                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
-                // If this function body corresponds to function with multiple signature, it is implementation of overload
-                // e.g.: function foo(a: string): string;
-                //       function foo(a: number): number;
-                //       function foo(a: any) { // This is implementation of the overloads
-                //           return a;
-                //       }
-                return signaturesOfSymbol.length > 1 ||
-                    // If there is single signature for the symbol, it is overload if that signature isn't coming from the node
-                    // e.g.: function foo(a: string): string;
-                    //       function foo(a: any) { // This is implementation of the overloads
-                    //           return a;
-                    //       }
-                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
-            }
-            return false;
-        }
-        function getNodeCheckFlags(node) {
-            return getNodeLinks(node).flags;
-        }
-        function getEnumMemberValue(node) {
-            computeEnumMemberValues(node.parent);
-            return getNodeLinks(node).enumMemberValue;
-        }
-        function getConstantValue(node) {
-            if (node.kind === 255 /* EnumMember */) {
-                return getEnumMemberValue(node);
-            }
-            var symbol = getNodeLinks(node).resolvedSymbol;
-            if (symbol && (symbol.flags & 8 /* EnumMember */)) {
-                // inline property\index accesses only for const enums
-                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
-                    return getEnumMemberValue(symbol.valueDeclaration);
-                }
-            }
-            return undefined;
-        }
-        function isFunctionType(type) {
-            return type.flags & 80896 /* ObjectType */ && getSignaturesOfType(type, 0 /* Call */).length > 0;
-        }
-        function getTypeReferenceSerializationKind(typeName) {
-            // Resolve the symbol as a value to ensure the type can be reached at runtime during emit.
-            var valueSymbol = resolveEntityName(typeName, 107455 /* Value */, /*ignoreErrors*/ true);
-            var constructorType = valueSymbol ? getTypeOfSymbol(valueSymbol) : undefined;
-            if (constructorType && isConstructorType(constructorType)) {
-                return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
-            }
-            // Resolve the symbol as a type so that we can provide a more useful hint for the type serializer.
-            var typeSymbol = resolveEntityName(typeName, 793056 /* Type */, /*ignoreErrors*/ true);
-            // We might not be able to resolve type symbol so use unknown type in that case (eg error case)
-            if (!typeSymbol) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            var type = getDeclaredTypeOfSymbol(typeSymbol);
-            if (type === unknownType) {
-                return ts.TypeReferenceSerializationKind.Unknown;
-            }
-            else if (type.flags & 1 /* Any */) {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-            else if (isTypeOfKind(type, 16 /* Void */)) {
-                return ts.TypeReferenceSerializationKind.VoidType;
-            }
-            else if (isTypeOfKind(type, 8 /* Boolean */)) {
-                return ts.TypeReferenceSerializationKind.BooleanType;
-            }
-            else if (isTypeOfKind(type, 132 /* NumberLike */)) {
-                return ts.TypeReferenceSerializationKind.NumberLikeType;
-            }
-            else if (isTypeOfKind(type, 258 /* StringLike */)) {
-                return ts.TypeReferenceSerializationKind.StringLikeType;
-            }
-            else if (isTypeOfKind(type, 8192 /* Tuple */)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
-            }
-            else if (isTypeOfKind(type, 16777216 /* ESSymbol */)) {
-                return ts.TypeReferenceSerializationKind.ESSymbolType;
-            }
-            else if (isFunctionType(type)) {
-                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
-            }
-            else if (isArrayType(type)) {
-                return ts.TypeReferenceSerializationKind.ArrayLikeType;
-            }
-            else {
-                return ts.TypeReferenceSerializationKind.ObjectType;
-            }
-        }
-        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
-            // Get type of the symbol if this is the valid symbol otherwise get type at location
-            var symbol = getSymbolOfNode(declaration);
-            var type = symbol && !(symbol.flags & (2048 /* TypeLiteral */ | 131072 /* Signature */))
-                ? getTypeOfSymbol(symbol)
-                : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
-            var signature = getSignatureFromDeclaration(signatureDeclaration);
-            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
-        }
-        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
-            var type = getWidenedType(getTypeOfExpression(expr));
-            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        }
-        function writeBaseConstructorTypeOfClass(node, enclosingDeclaration, flags, writer) {
-            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(node));
-            resolveBaseTypesOfClass(classType);
-            var baseType = classType.resolvedBaseTypes.length ? classType.resolvedBaseTypes[0] : unknownType;
-            getSymbolDisplayBuilder().buildTypeDisplay(baseType, writer, enclosingDeclaration, flags);
-        }
-        function hasGlobalName(name) {
-            return ts.hasProperty(globals, name);
-        }
-        function getReferencedValueSymbol(reference) {
-            return getNodeLinks(reference).resolvedSymbol ||
-                resolveName(reference, reference.text, 107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */, 
-                /*nodeNotFoundMessage*/ undefined, /*nameArg*/ undefined);
-        }
-        function getReferencedValueDeclaration(reference) {
-            ts.Debug.assert(!ts.nodeIsSynthesized(reference));
-            var symbol = getReferencedValueSymbol(reference);
-            return symbol && getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
-        }
-        function createResolver() {
-            // this variable and functions that use it are deliberately moved here from the outer scope
-            // to avoid scope pollution
-            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
-            var fileToDirective;
-            if (resolvedTypeReferenceDirectives) {
-                // populate reverse mapping: file path -> type reference directive that was resolved to this file
-                fileToDirective = ts.createFileMap();
-                for (var key in resolvedTypeReferenceDirectives) {
-                    if (!ts.hasProperty(resolvedTypeReferenceDirectives, key)) {
-                        continue;
-                    }
-                    var resolvedDirective = resolvedTypeReferenceDirectives[key];
-                    if (!resolvedDirective) {
-                        continue;
-                    }
-                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
-                    fileToDirective.set(file.path, key);
-                }
-            }
-            return {
-                getReferencedExportContainer: getReferencedExportContainer,
-                getReferencedImportDeclaration: getReferencedImportDeclaration,
-                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
-                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
-                isValueAliasDeclaration: isValueAliasDeclaration,
-                hasGlobalName: hasGlobalName,
-                isReferencedAliasDeclaration: isReferencedAliasDeclaration,
-                getNodeCheckFlags: getNodeCheckFlags,
-                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
-                isDeclarationVisible: isDeclarationVisible,
-                isImplementationOfOverload: isImplementationOfOverload,
-                writeTypeOfDeclaration: writeTypeOfDeclaration,
-                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
-                writeTypeOfExpression: writeTypeOfExpression,
-                writeBaseConstructorTypeOfClass: writeBaseConstructorTypeOfClass,
-                isSymbolAccessible: isSymbolAccessible,
-                isEntityNameVisible: isEntityNameVisible,
-                getConstantValue: getConstantValue,
-                collectLinkedAliases: collectLinkedAliases,
-                getReferencedValueDeclaration: getReferencedValueDeclaration,
-                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
-                isOptionalParameter: isOptionalParameter,
-                moduleExportsSomeValue: moduleExportsSomeValue,
-                isArgumentsLocalBinding: isArgumentsLocalBinding,
-                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
-                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
-                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol
-            };
-            // defined here to avoid outer scope pollution
-            function getTypeReferenceDirectivesForEntityName(node) {
-                // program does not have any files with type reference directives - bail out
-                if (!fileToDirective) {
-                    return undefined;
-                }
-                // property access can only be used as values
-                // qualified names can only be used as types\namespaces
-                // identifiers are treated as values only if they appear in type queries
-                var meaning = (node.kind === 172 /* PropertyAccessExpression */) || (node.kind === 69 /* Identifier */ && isInTypeQuery(node))
-                    ? 107455 /* Value */ | 1048576 /* ExportValue */
-                    : 793056 /* Type */ | 1536 /* Namespace */;
-                var symbol = resolveEntityName(node, meaning, /*ignoreErrors*/ true);
-                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
-            }
-            // defined here to avoid outer scope pollution
-            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
-                // program does not have any files with type reference directives - bail out
-                if (!fileToDirective) {
-                    return undefined;
-                }
-                if (!isSymbolFromTypeDeclarationFile(symbol)) {
-                    return undefined;
-                }
-                // check what declarations in the symbol can contribute to the target meaning
-                var typeReferenceDirectives;
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    // check meaning of the local symbol to see if declaration needs to be analyzed further
-                    if (decl.symbol && decl.symbol.flags & meaning) {
-                        var file = ts.getSourceFileOfNode(decl);
-                        var typeReferenceDirective = fileToDirective.get(file.path);
-                        if (typeReferenceDirective) {
-                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
-                        }
-                    }
-                }
-                return typeReferenceDirectives;
-            }
-            function isSymbolFromTypeDeclarationFile(symbol) {
-                // bail out if symbol does not have associated declarations (i.e. this is transient symbol created for property in binding pattern)
-                if (!symbol.declarations) {
-                    return false;
-                }
-                // walk the parent chain for symbols to make sure that top level parent symbol is in the global scope
-                // external modules cannot define or contribute to type declaration files
-                var current = symbol;
-                while (true) {
-                    var parent_12 = getParentOfSymbol(current);
-                    if (parent_12) {
-                        current = parent_12;
-                    }
-                    else {
-                        break;
-                    }
-                }
-                if (current.valueDeclaration && current.valueDeclaration.kind === 256 /* SourceFile */ && current.flags & 512 /* ValueModule */) {
-                    return false;
-                }
-                // check that at least one declaration of top level symbol originates from type declaration file
-                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
-                    var decl = _a[_i];
-                    var file = ts.getSourceFileOfNode(decl);
-                    if (fileToDirective.contains(file.path)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-        }
-        function getExternalModuleFileFromDeclaration(declaration) {
-            var specifier = ts.getExternalModuleName(declaration);
-            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, /*moduleNotFoundError*/ undefined);
-            if (!moduleSymbol) {
-                return undefined;
-            }
-            return ts.getDeclarationOfKind(moduleSymbol, 256 /* SourceFile */);
-        }
-        function initializeTypeChecker() {
-            // Bind all source files and propagate errors
-            ts.forEach(host.getSourceFiles(), function (file) {
-                ts.bindSourceFile(file, compilerOptions);
-            });
-            var augmentations;
-            // Initialize global symbol table
-            ts.forEach(host.getSourceFiles(), function (file) {
-                if (!ts.isExternalOrCommonJsModule(file)) {
-                    mergeSymbolTable(globals, file.locals);
-                }
-                if (file.moduleAugmentations.length) {
-                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
-                }
-                if (file.symbol && file.symbol.globalExports) {
-                    mergeSymbolTable(globals, file.symbol.globalExports);
-                }
-            });
-            if (augmentations) {
-                // merge module augmentations.
-                // this needs to be done after global symbol table is initialized to make sure that all ambient modules are indexed
-                for (var _i = 0, augmentations_1 = augmentations; _i < augmentations_1.length; _i++) {
-                    var list = augmentations_1[_i];
-                    for (var _a = 0, list_2 = list; _a < list_2.length; _a++) {
-                        var augmentation = list_2[_a];
-                        mergeModuleAugmentation(augmentation);
-                    }
-                }
-            }
-            // Setup global builtins
-            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
-            getSymbolLinks(undefinedSymbol).type = undefinedType;
-            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
-            getSymbolLinks(unknownSymbol).type = unknownType;
-            // Initialize special types
-            globalArrayType = getGlobalType("Array", /*arity*/ 1);
-            globalObjectType = getGlobalType("Object");
-            globalFunctionType = getGlobalType("Function");
-            globalStringType = getGlobalType("String");
-            globalNumberType = getGlobalType("Number");
-            globalBooleanType = getGlobalType("Boolean");
-            globalRegExpType = getGlobalType("RegExp");
-            jsxElementType = getExportedTypeFromNamespace("JSX", JsxNames.Element);
-            getGlobalClassDecoratorType = ts.memoize(function () { return getGlobalType("ClassDecorator"); });
-            getGlobalPropertyDecoratorType = ts.memoize(function () { return getGlobalType("PropertyDecorator"); });
-            getGlobalMethodDecoratorType = ts.memoize(function () { return getGlobalType("MethodDecorator"); });
-            getGlobalParameterDecoratorType = ts.memoize(function () { return getGlobalType("ParameterDecorator"); });
-            getGlobalTypedPropertyDescriptorType = ts.memoize(function () { return getGlobalType("TypedPropertyDescriptor", /*arity*/ 1); });
-            getGlobalESSymbolConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Symbol"); });
-            getGlobalPromiseType = ts.memoize(function () { return getGlobalType("Promise", /*arity*/ 1); });
-            tryGetGlobalPromiseType = ts.memoize(function () { return getGlobalSymbol("Promise", 793056 /* Type */, /*diagnostic*/ undefined) && getGlobalPromiseType(); });
-            getGlobalPromiseLikeType = ts.memoize(function () { return getGlobalType("PromiseLike", /*arity*/ 1); });
-            getInstantiatedGlobalPromiseLikeType = ts.memoize(createInstantiatedPromiseLikeType);
-            getGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Promise"); });
-            getGlobalPromiseConstructorLikeType = ts.memoize(function () { return getGlobalType("PromiseConstructorLike"); });
-            getGlobalThenableType = ts.memoize(createThenableType);
-            getGlobalTemplateStringsArrayType = ts.memoize(function () { return getGlobalType("TemplateStringsArray"); });
-            if (languageVersion >= 2 /* ES6 */) {
-                getGlobalESSymbolType = ts.memoize(function () { return getGlobalType("Symbol"); });
-                getGlobalIterableType = ts.memoize(function () { return getGlobalType("Iterable", /*arity*/ 1); });
-                getGlobalIteratorType = ts.memoize(function () { return getGlobalType("Iterator", /*arity*/ 1); });
-                getGlobalIterableIteratorType = ts.memoize(function () { return getGlobalType("IterableIterator", /*arity*/ 1); });
-            }
-            else {
-                getGlobalESSymbolType = ts.memoize(function () { return emptyObjectType; });
-                getGlobalIterableType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIteratorType = ts.memoize(function () { return emptyGenericType; });
-                getGlobalIterableIteratorType = ts.memoize(function () { return emptyGenericType; });
-            }
-            anyArrayType = createArrayType(anyType);
-            var symbol = getGlobalSymbol("ReadonlyArray", 793056 /* Type */, /*diagnostic*/ undefined);
-            globalReadonlyArrayType = symbol && getTypeOfGlobalSymbol(symbol, /*arity*/ 1);
-            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
-        }
-        function createInstantiatedPromiseLikeType() {
-            var promiseLikeType = getGlobalPromiseLikeType();
-            if (promiseLikeType !== emptyGenericType) {
-                return createTypeReference(promiseLikeType, [anyType]);
-            }
-            return emptyObjectType;
-        }
-        function createThenableType() {
-            // build the thenable type that is used to verify against a non-promise "thenable" operand to `await`.
-            var thenPropertySymbol = createSymbol(67108864 /* Transient */ | 4 /* Property */, "then");
-            getSymbolLinks(thenPropertySymbol).type = globalFunctionType;
-            var thenableType = createObjectType(65536 /* Anonymous */);
-            thenableType.properties = [thenPropertySymbol];
-            thenableType.members = createSymbolTable(thenableType.properties);
-            thenableType.callSignatures = [];
-            thenableType.constructSignatures = [];
-            return thenableType;
-        }
-        // GRAMMAR CHECKING
-        function checkGrammarDecorators(node) {
-            if (!node.decorators) {
-                return false;
-            }
-            if (!ts.nodeCanBeDecorated(node)) {
-                if (node.kind === 147 /* MethodDeclaration */ && !ts.nodeIsPresent(node.body)) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
-                }
-                else {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
-                }
-            }
-            else if (node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */) {
-                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
-                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
-                }
-            }
-            return false;
-        }
-        function checkGrammarModifiers(node) {
-            switch (node.kind) {
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 148 /* Constructor */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 153 /* IndexSignature */:
-                case 225 /* ModuleDeclaration */:
-                case 230 /* ImportDeclaration */:
-                case 229 /* ImportEqualsDeclaration */:
-                case 236 /* ExportDeclaration */:
-                case 235 /* ExportAssignment */:
-                case 142 /* Parameter */:
-                    break;
-                case 220 /* FunctionDeclaration */:
-                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 118 /* AsyncKeyword */) &&
-                        node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 256 /* SourceFile */) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 200 /* VariableStatement */:
-                case 223 /* TypeAliasDeclaration */:
-                    if (node.modifiers && node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 256 /* SourceFile */) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                case 224 /* EnumDeclaration */:
-                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 74 /* ConstKeyword */) &&
-                        node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 256 /* SourceFile */) {
-                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
-                    }
-                    break;
-                default:
-                    return false;
-            }
-            if (!node.modifiers) {
-                return;
-            }
-            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
-            var flags = 0;
-            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
-                var modifier = _a[_i];
-                if (modifier.kind !== 128 /* ReadonlyKeyword */) {
-                    if (node.kind === 144 /* PropertySignature */ || node.kind === 146 /* MethodSignature */) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
-                    }
-                    if (node.kind === 153 /* IndexSignature */) {
-                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
-                    }
-                }
-                switch (modifier.kind) {
-                    case 74 /* ConstKeyword */:
-                        if (node.kind !== 224 /* EnumDeclaration */ && node.parent.kind === 221 /* ClassDeclaration */) {
-                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(74 /* ConstKeyword */));
-                        }
-                        break;
-                    case 112 /* PublicKeyword */:
-                    case 111 /* ProtectedKeyword */:
-                    case 110 /* PrivateKeyword */:
-                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
-                        if (modifier.kind === 111 /* ProtectedKeyword */) {
-                            lastProtected = modifier;
-                        }
-                        else if (modifier.kind === 110 /* PrivateKeyword */) {
-                            lastPrivate = modifier;
-                        }
-                        if (flags & 28 /* AccessibilityModifier */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
-                        }
-                        else if (flags & 32 /* Static */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
-                        }
-                        else if (flags & 64 /* Readonly */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
-                        }
-                        else if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
-                        }
-                        else if (flags & 128 /* Abstract */) {
-                            if (modifier.kind === 110 /* PrivateKeyword */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
-                            }
-                            else {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
-                            }
-                        }
-                        flags |= ts.modifierToFlag(modifier.kind);
-                        break;
-                    case 113 /* StaticKeyword */:
-                        if (flags & 32 /* Static */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
-                        }
-                        else if (flags & 64 /* Readonly */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
-                        }
-                        else if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
-                        }
-                        else if (flags & 128 /* Abstract */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                        }
-                        flags |= 32 /* Static */;
-                        lastStatic = modifier;
-                        break;
-                    case 128 /* ReadonlyKeyword */:
-                        if (flags & 64 /* Readonly */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
-                        }
-                        else if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */ && node.kind !== 153 /* IndexSignature */ && node.kind !== 142 /* Parameter */) {
-                            // If node.kind === SyntaxKind.Parameter, checkParameter report an error if it's not a parameter property.
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
-                        }
-                        flags |= 64 /* Readonly */;
-                        lastReadonly = modifier;
-                        break;
-                    case 82 /* ExportKeyword */:
-                        if (flags & 1 /* Export */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
-                        }
-                        else if (flags & 2 /* Ambient */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
-                        }
-                        else if (flags & 128 /* Abstract */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
-                        }
-                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
-                        }
-                        flags |= 1 /* Export */;
-                        break;
-                    case 122 /* DeclareKeyword */:
-                        if (flags & 2 /* Ambient */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
-                        }
-                        else if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
-                        }
-                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 226 /* ModuleBlock */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
-                        }
-                        flags |= 2 /* Ambient */;
-                        lastDeclare = modifier;
-                        break;
-                    case 115 /* AbstractKeyword */:
-                        if (flags & 128 /* Abstract */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
-                        }
-                        if (node.kind !== 221 /* ClassDeclaration */) {
-                            if (node.kind !== 147 /* MethodDeclaration */ &&
-                                node.kind !== 145 /* PropertyDeclaration */ &&
-                                node.kind !== 149 /* GetAccessor */ &&
-                                node.kind !== 150 /* SetAccessor */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
-                            }
-                            if (!(node.parent.kind === 221 /* ClassDeclaration */ && node.parent.flags & 128 /* Abstract */)) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
-                            }
-                            if (flags & 32 /* Static */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
-                            }
-                            if (flags & 8 /* Private */) {
-                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
-                            }
-                        }
-                        flags |= 128 /* Abstract */;
-                        break;
-                    case 118 /* AsyncKeyword */:
-                        if (flags & 256 /* Async */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
-                        }
-                        else if (flags & 2 /* Ambient */ || ts.isInAmbientContext(node.parent)) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
-                        }
-                        else if (node.kind === 142 /* Parameter */) {
-                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
-                        }
-                        flags |= 256 /* Async */;
-                        lastAsync = modifier;
-                        break;
-                }
-            }
-            if (node.kind === 148 /* Constructor */) {
-                if (flags & 32 /* Static */) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
-                }
-                if (flags & 128 /* Abstract */) {
-                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
-                }
-                else if (flags & 256 /* Async */) {
-                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
-                }
-                else if (flags & 64 /* Readonly */) {
-                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
-                }
-                return;
-            }
-            else if ((node.kind === 230 /* ImportDeclaration */ || node.kind === 229 /* ImportEqualsDeclaration */) && flags & 2 /* Ambient */) {
-                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
-            }
-            else if (node.kind === 142 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && ts.isBindingPattern(node.name)) {
-                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_a_binding_pattern);
-            }
-            if (flags & 256 /* Async */) {
-                return checkGrammarAsyncModifier(node, lastAsync);
-            }
-        }
-        function checkGrammarAsyncModifier(node, asyncModifier) {
-            if (languageVersion < 2 /* ES6 */) {
-                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
-            }
-            switch (node.kind) {
-                case 147 /* MethodDeclaration */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    if (!node.asteriskToken) {
-                        return false;
-                    }
-                    break;
-            }
-            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
-        }
-        function checkGrammarForDisallowedTrailingComma(list) {
-            if (list && list.hasTrailingComma) {
-                var start = list.end - ",".length;
-                var end = list.end;
-                var sourceFile = ts.getSourceFileOfNode(list[0]);
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
-            }
-        }
-        function checkGrammarTypeParameterList(node, typeParameters, file) {
-            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
-                return true;
-            }
-            if (typeParameters && typeParameters.length === 0) {
-                var start = typeParameters.pos - "<".length;
-                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
-                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
-            }
-        }
-        function checkGrammarParameterList(parameters) {
-            if (checkGrammarForDisallowedTrailingComma(parameters)) {
-                return true;
-            }
-            var seenOptionalParameter = false;
-            var parameterCount = parameters.length;
-            for (var i = 0; i < parameterCount; i++) {
-                var parameter = parameters[i];
-                if (parameter.dotDotDotToken) {
-                    if (i !== (parameterCount - 1)) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
-                    }
-                    if (ts.isBindingPattern(parameter.name)) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
-                    }
-                    if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
-                    }
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
-                    }
-                }
-                else if (parameter.questionToken) {
-                    seenOptionalParameter = true;
-                    if (parameter.initializer) {
-                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
-                    }
-                }
-                else if (seenOptionalParameter && !parameter.initializer) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
-                }
-            }
-        }
-        function checkGrammarFunctionLikeDeclaration(node) {
-            // Prevent cascading error by short-circuit
-            var file = ts.getSourceFileOfNode(node);
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node, node.typeParameters, file) ||
-                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
-        }
-        function checkGrammarArrowFunction(node, file) {
-            if (node.kind === 180 /* ArrowFunction */) {
-                var arrowFunction = node;
-                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
-                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
-                if (startLine !== endLine) {
-                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
-                }
-            }
-            return false;
-        }
-        function checkGrammarIndexSignatureParameters(node) {
-            var parameter = node.parameters[0];
-            if (node.parameters.length !== 1) {
-                if (parameter) {
-                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
-                }
-                else {
-                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
-                }
-            }
-            if (parameter.dotDotDotToken) {
-                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
-            }
-            if (parameter.flags & 1023 /* Modifier */) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
-            }
-            if (parameter.questionToken) {
-                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
-            }
-            if (parameter.initializer) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
-            }
-            if (!parameter.type) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
-            }
-            if (parameter.type.kind !== 132 /* StringKeyword */ && parameter.type.kind !== 130 /* NumberKeyword */) {
-                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
-            }
-            if (!node.type) {
-                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
-            }
-        }
-        function checkGrammarIndexSignature(node) {
-            // Prevent cascading error by short-circuit
-            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
-        }
-        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
-            if (typeArguments && typeArguments.length === 0) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                var start = typeArguments.pos - "<".length;
-                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
-                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
-            }
-        }
-        function checkGrammarTypeArguments(node, typeArguments) {
-            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
-                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
-        }
-        function checkGrammarForOmittedArgument(node, args) {
-            if (args) {
-                var sourceFile = ts.getSourceFileOfNode(node);
-                for (var _i = 0, args_1 = args; _i < args_1.length; _i++) {
-                    var arg = args_1[_i];
-                    if (arg.kind === 193 /* OmittedExpression */) {
-                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
-                    }
-                }
-            }
-        }
-        function checkGrammarArguments(node, args) {
-            return checkGrammarForDisallowedTrailingComma(args) ||
-                checkGrammarForOmittedArgument(node, args);
-        }
-        function checkGrammarHeritageClause(node) {
-            var types = node.types;
-            if (checkGrammarForDisallowedTrailingComma(types)) {
-                return true;
-            }
-            if (types && types.length === 0) {
-                var listType = ts.tokenToString(node.token);
-                var sourceFile = ts.getSourceFileOfNode(node);
-                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
-            }
-        }
-        function checkGrammarClassDeclarationHeritageClauses(node) {
-            var seenExtendsClause = false;
-            var seenImplementsClause = false;
-            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83 /* ExtendsKeyword */) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
-                        }
-                        if (heritageClause.types.length > 1) {
-                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
-                        }
-                        seenExtendsClause = true;
-                    }
-                    else {
-                        ts.Debug.assert(heritageClause.token === 106 /* ImplementsKeyword */);
-                        if (seenImplementsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
-                        }
-                        seenImplementsClause = true;
-                    }
-                    // Grammar checking heritageClause inside class declaration
-                    checkGrammarHeritageClause(heritageClause);
-                }
-            }
-        }
-        function checkGrammarInterfaceDeclaration(node) {
-            var seenExtendsClause = false;
-            if (node.heritageClauses) {
-                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
-                    var heritageClause = _a[_i];
-                    if (heritageClause.token === 83 /* ExtendsKeyword */) {
-                        if (seenExtendsClause) {
-                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
-                        }
-                        seenExtendsClause = true;
-                    }
-                    else {
-                        ts.Debug.assert(heritageClause.token === 106 /* ImplementsKeyword */);
-                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
-                    }
-                    // Grammar checking heritageClause inside class declaration
-                    checkGrammarHeritageClause(heritageClause);
-                }
-            }
-            return false;
-        }
-        function checkGrammarComputedPropertyName(node) {
-            // If node is not a computedPropertyName, just skip the grammar checking
-            if (node.kind !== 140 /* ComputedPropertyName */) {
-                return false;
-            }
-            var computedPropertyName = node;
-            if (computedPropertyName.expression.kind === 187 /* BinaryExpression */ && computedPropertyName.expression.operatorToken.kind === 24 /* CommaToken */) {
-                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
-            }
-        }
-        function checkGrammarForGenerator(node) {
-            if (node.asteriskToken) {
-                ts.Debug.assert(node.kind === 220 /* FunctionDeclaration */ ||
-                    node.kind === 179 /* FunctionExpression */ ||
-                    node.kind === 147 /* MethodDeclaration */);
-                if (ts.isInAmbientContext(node)) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
-                }
-                if (!node.body) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
-                }
-                if (languageVersion < 2 /* ES6 */) {
-                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
-                }
-            }
-        }
-        function checkGrammarForInvalidQuestionMark(node, questionToken, message) {
-            if (questionToken) {
-                return grammarErrorOnNode(questionToken, message);
-            }
-        }
-        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
-            var seen = {};
-            var Property = 1;
-            var GetAccessor = 2;
-            var SetAccessor = 4;
-            var GetOrSetAccessor = GetAccessor | SetAccessor;
-            var _loop_1 = function(prop) {
-                var name_20 = prop.name;
-                if (prop.kind === 193 /* OmittedExpression */ ||
-                    name_20.kind === 140 /* ComputedPropertyName */) {
-                    // If the name is not a ComputedPropertyName, the grammar checking will skip it
-                    checkGrammarComputedPropertyName(name_20);
-                }
-                if (prop.kind === 254 /* ShorthandPropertyAssignment */ && !inDestructuring && prop.objectAssignmentInitializer) {
-                    // having objectAssignmentInitializer is only valid in ObjectAssignmentPattern
-                    // outside of destructuring it is a syntax error
-                    return { value: grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment) };
-                }
-                // Modifiers are never allowed on properties except for 'async' on a method declaration
-                ts.forEach(prop.modifiers, function (mod) {
-                    if (mod.kind !== 118 /* AsyncKeyword */ || prop.kind !== 147 /* MethodDeclaration */) {
-                        grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
-                    }
-                });
-                // ECMA-262 11.1.5 Object Initializer
-                // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
-                // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
-                // IsDataDescriptor(propId.descriptor) is true.
-                //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
-                //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
-                //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
-                // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
-                var currentKind = void 0;
-                if (prop.kind === 253 /* PropertyAssignment */ || prop.kind === 254 /* ShorthandPropertyAssignment */) {
-                    // Grammar checking for computedPropertyName and shorthandPropertyAssignment
-                    checkGrammarForInvalidQuestionMark(prop, prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
-                    if (name_20.kind === 8 /* NumericLiteral */) {
-                        checkGrammarNumericLiteral(name_20);
-                    }
-                    currentKind = Property;
-                }
-                else if (prop.kind === 147 /* MethodDeclaration */) {
-                    currentKind = Property;
-                }
-                else if (prop.kind === 149 /* GetAccessor */) {
-                    currentKind = GetAccessor;
-                }
-                else if (prop.kind === 150 /* SetAccessor */) {
-                    currentKind = SetAccessor;
-                }
-                else {
-                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
-                }
-                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_20);
-                if (effectiveName === undefined) {
-                    return "continue";
-                }
-                if (!ts.hasProperty(seen, effectiveName)) {
-                    seen[effectiveName] = currentKind;
-                }
-                else {
-                    var existingKind = seen[effectiveName];
-                    if (currentKind === Property && existingKind === Property) {
-                        grammarErrorOnNode(name_20, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_20));
-                    }
-                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
-                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
-                            seen[effectiveName] = currentKind | existingKind;
-                        }
-                        else {
-                            return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
-                        }
-                    }
-                    else {
-                        return { value: grammarErrorOnNode(name_20, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name) };
-                    }
-                }
-            };
-            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
-                var prop = _a[_i];
-                var state_2 = _loop_1(prop);
-                if (typeof state_2 === "object") return state_2.value;
-            }
-        }
-        function checkGrammarJsxElement(node) {
-            var seen = {};
-            for (var _i = 0, _a = node.attributes; _i < _a.length; _i++) {
-                var attr = _a[_i];
-                if (attr.kind === 247 /* JsxSpreadAttribute */) {
-                    continue;
-                }
-                var jsxAttr = attr;
-                var name_21 = jsxAttr.name;
-                if (!ts.hasProperty(seen, name_21.text)) {
-                    seen[name_21.text] = true;
-                }
-                else {
-                    return grammarErrorOnNode(name_21, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
-                }
-                var initializer = jsxAttr.initializer;
-                if (initializer && initializer.kind === 248 /* JsxExpression */ && !initializer.expression) {
-                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
-                }
-            }
-        }
-        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
-            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
-                return true;
-            }
-            if (forInOrOfStatement.initializer.kind === 219 /* VariableDeclarationList */) {
-                var variableList = forInOrOfStatement.initializer;
-                if (!checkGrammarVariableDeclarationList(variableList)) {
-                    var declarations = variableList.declarations;
-                    // declarations.length can be zero if there is an error in variable declaration in for-of or for-in
-                    // See http://www.ecma-international.org/ecma-262/6.0/#sec-for-in-and-for-of-statements for details
-                    // For example:
-                    //      var let = 10;
-                    //      for (let of [1,2,3]) {} // this is invalid ES6 syntax
-                    //      for (let in [1,2,3]) {} // this is invalid ES6 syntax
-                    // We will then want to skip on grammar checking on variableList declaration
-                    if (!declarations.length) {
-                        return false;
-                    }
-                    if (declarations.length > 1) {
-                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
-                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
-                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
-                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
-                    }
-                    var firstDeclaration = declarations[0];
-                    if (firstDeclaration.initializer) {
-                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
-                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
-                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
-                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
-                    }
-                    if (firstDeclaration.type) {
-                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
-                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
-                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
-                        return grammarErrorOnNode(firstDeclaration, diagnostic);
-                    }
-                }
-            }
-            return false;
-        }
-        function checkGrammarAccessor(accessor) {
-            var kind = accessor.kind;
-            if (languageVersion < 1 /* ES5 */) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
-            }
-            else if (ts.isInAmbientContext(accessor)) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
-            }
-            else if (accessor.body === undefined && !(accessor.flags & 128 /* Abstract */)) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
-            }
-            else if (accessor.typeParameters) {
-                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
-            }
-            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
-                return grammarErrorOnNode(accessor.name, kind === 149 /* GetAccessor */ ?
-                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
-                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
-            }
-            else if (kind === 150 /* SetAccessor */) {
-                if (accessor.type) {
-                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
-                }
-                else {
-                    var parameter = accessor.parameters[0];
-                    if (parameter.dotDotDotToken) {
-                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
-                    }
-                    else if (parameter.questionToken) {
-                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
-                    }
-                    else if (parameter.initializer) {
-                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
-                    }
-                }
-            }
-        }
-        /** Does the accessor have the right number of parameters?
-
-            A get accessor has no parameters or a single `this` parameter.
-            A set accessor has one parameter or a `this` parameter and one more parameter */
-        function doesAccessorHaveCorrectParameterCount(accessor) {
-            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 149 /* GetAccessor */ ? 0 : 1);
-        }
-        function getAccessorThisParameter(accessor) {
-            if (accessor.parameters.length === (accessor.kind === 149 /* GetAccessor */ ? 1 : 2) &&
-                accessor.parameters[0].name.kind === 69 /* Identifier */ &&
-                accessor.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */) {
-                return accessor.parameters[0];
-            }
-        }
-        function checkGrammarForNonSymbolComputedProperty(node, message) {
-            if (ts.isDynamicName(node)) {
-                return grammarErrorOnNode(node, message);
-            }
-        }
-        function checkGrammarMethod(node) {
-            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
-                checkGrammarFunctionLikeDeclaration(node) ||
-                checkGrammarForGenerator(node)) {
-                return true;
-            }
-            if (node.parent.kind === 171 /* ObjectLiteralExpression */) {
-                if (checkGrammarForInvalidQuestionMark(node, node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
-                    return true;
-                }
-                else if (node.body === undefined) {
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
-                }
-            }
-            if (ts.isClassLike(node.parent)) {
-                // Technically, computed properties in ambient contexts is disallowed
-                // for property declarations and accessors too, not just methods.
-                // However, property declarations disallow computed names in general,
-                // and accessors are not allowed in ambient contexts in general,
-                // so this error only really matters for methods.
-                if (ts.isInAmbientContext(node)) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
-                }
-                else if (!node.body) {
-                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
-                }
-            }
-            else if (node.parent.kind === 222 /* InterfaceDeclaration */) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
-            }
-            else if (node.parent.kind === 159 /* TypeLiteral */) {
-                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
-            }
-        }
-        function checkGrammarBreakOrContinueStatement(node) {
-            var current = node;
-            while (current) {
-                if (ts.isFunctionLike(current)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
-                }
-                switch (current.kind) {
-                    case 214 /* LabeledStatement */:
-                        if (node.label && current.label.text === node.label.text) {
-                            // found matching label - verify that label usage is correct
-                            // continue can only target labels that are on iteration statements
-                            var isMisplacedContinueLabel = node.kind === 209 /* ContinueStatement */
-                                && !ts.isIterationStatement(current.statement, /*lookInLabeledStatement*/ true);
-                            if (isMisplacedContinueLabel) {
-                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
-                            }
-                            return false;
-                        }
-                        break;
-                    case 213 /* SwitchStatement */:
-                        if (node.kind === 210 /* BreakStatement */ && !node.label) {
-                            // unlabeled break within switch statement - ok
-                            return false;
-                        }
-                        break;
-                    default:
-                        if (ts.isIterationStatement(current, /*lookInLabeledStatement*/ false) && !node.label) {
-                            // unlabeled break or continue within iteration statement - ok
-                            return false;
-                        }
-                        break;
-                }
-                current = current.parent;
-            }
-            if (node.label) {
-                var message = node.kind === 210 /* BreakStatement */
-                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-            else {
-                var message = node.kind === 210 /* BreakStatement */
-                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
-                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
-                return grammarErrorOnNode(node, message);
-            }
-        }
-        function checkGrammarBindingElement(node) {
-            if (node.dotDotDotToken) {
-                var elements = node.parent.elements;
-                if (node !== ts.lastOrUndefined(elements)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
-                }
-                if (node.name.kind === 168 /* ArrayBindingPattern */ || node.name.kind === 167 /* ObjectBindingPattern */) {
-                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
-                }
-                if (node.initializer) {
-                    // Error on equals token which immediate precedes the initializer
-                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
-                }
-            }
-        }
-        function checkGrammarVariableDeclaration(node) {
-            if (node.parent.parent.kind !== 207 /* ForInStatement */ && node.parent.parent.kind !== 208 /* ForOfStatement */) {
-                if (ts.isInAmbientContext(node)) {
-                    if (node.initializer) {
-                        // Error on equals token which immediate precedes the initializer
-                        var equalsTokenLength = "=".length;
-                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-                    }
-                }
-                else if (!node.initializer) {
-                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
-                    }
-                    if (ts.isConst(node)) {
-                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
-                    }
-                }
-            }
-            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
-            // 1. LexicalDeclaration : LetOrConst BindingList ;
-            // It is a Syntax Error if the BoundNames of BindingList contains "let".
-            // 2. ForDeclaration: ForDeclaration : LetOrConst ForBinding
-            // It is a Syntax Error if the BoundNames of ForDeclaration contains "let".
-            // It is a SyntaxError if a VariableDeclaration or VariableDeclarationNoIn occurs within strict code
-            // and its Identifier is eval or arguments
-            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
-        }
-        function checkGrammarNameInLetOrConstDeclarations(name) {
-            if (name.kind === 69 /* Identifier */) {
-                if (name.originalKeywordKind === 108 /* LetKeyword */) {
-                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
-                }
-            }
-            else {
-                var elements = name.elements;
-                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
-                    var element = elements_2[_i];
-                    if (element.kind !== 193 /* OmittedExpression */) {
-                        checkGrammarNameInLetOrConstDeclarations(element.name);
-                    }
-                }
-            }
-        }
-        function checkGrammarVariableDeclarationList(declarationList) {
-            var declarations = declarationList.declarations;
-            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
-                return true;
-            }
-            if (!declarationList.declarations.length) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
-            }
-        }
-        function allowLetAndConstDeclarations(parent) {
-            switch (parent.kind) {
-                case 203 /* IfStatement */:
-                case 204 /* DoStatement */:
-                case 205 /* WhileStatement */:
-                case 212 /* WithStatement */:
-                case 206 /* ForStatement */:
-                case 207 /* ForInStatement */:
-                case 208 /* ForOfStatement */:
-                    return false;
-                case 214 /* LabeledStatement */:
-                    return allowLetAndConstDeclarations(parent.parent);
-            }
-            return true;
-        }
-        function checkGrammarForDisallowedLetOrConstStatement(node) {
-            if (!allowLetAndConstDeclarations(node.parent)) {
-                if (ts.isLet(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
-                }
-                else if (ts.isConst(node.declarationList)) {
-                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
-                }
-            }
-        }
-        function hasParseDiagnostics(sourceFile) {
-            return sourceFile.parseDiagnostics.length > 0;
-        }
-        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        function checkGrammarConstructorTypeParameters(node) {
-            if (node.typeParameters) {
-                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
-            }
-        }
-        function checkGrammarConstructorTypeAnnotation(node) {
-            if (node.type) {
-                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
-            }
-        }
-        function checkGrammarProperty(node) {
-            if (ts.isClassLike(node.parent)) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-            }
-            else if (node.parent.kind === 222 /* InterfaceDeclaration */) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
-                }
-            }
-            else if (node.parent.kind === 159 /* TypeLiteral */) {
-                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
-                    return true;
-                }
-                if (node.initializer) {
-                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
-                }
-            }
-            if (ts.isInAmbientContext(node) && node.initializer) {
-                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
-            }
-        }
-        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
-            // A declare modifier is required for any top level .d.ts declaration except export=, export default,
-            // interfaces and imports categories:
-            //
-            //  DeclarationElement:
-            //     ExportAssignment
-            //     export_opt   InterfaceDeclaration
-            //     export_opt   TypeAliasDeclaration
-            //     export_opt   ImportDeclaration
-            //     export_opt   ExternalImportDeclaration
-            //     export_opt   AmbientDeclaration
-            //
-            // TODO: The spec needs to be amended to reflect this grammar.
-            if (node.kind === 222 /* InterfaceDeclaration */ ||
-                node.kind === 223 /* TypeAliasDeclaration */ ||
-                node.kind === 230 /* ImportDeclaration */ ||
-                node.kind === 229 /* ImportEqualsDeclaration */ ||
-                node.kind === 236 /* ExportDeclaration */ ||
-                node.kind === 235 /* ExportAssignment */ ||
-                (node.flags & 2 /* Ambient */) ||
-                (node.flags & (1 /* Export */ | 512 /* Default */))) {
-                return false;
-            }
-            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
-        }
-        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
-            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
-                var decl = _a[_i];
-                if (ts.isDeclaration(decl) || decl.kind === 200 /* VariableStatement */) {
-                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
-                        return true;
-                    }
-                }
-            }
-        }
-        function checkGrammarSourceFile(node) {
-            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
-        }
-        function checkGrammarStatementInAmbientContext(node) {
-            if (ts.isInAmbientContext(node)) {
-                // An accessors is already reported about the ambient context
-                if (isAccessor(node.parent.kind)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
-                }
-                // Find containing block which is either Block, ModuleBlock, SourceFile
-                var links = getNodeLinks(node);
-                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
-                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
-                }
-                // We are either parented by another statement, or some sort of block.
-                // If we're in a block, we only want to really report an error once
-                // to prevent noisiness.  So use a bit on the block to indicate if
-                // this has already been reported, and don't report if it has.
-                //
-                if (node.parent.kind === 199 /* Block */ || node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
-                    var links_1 = getNodeLinks(node.parent);
-                    // Check if the containing block ever report this error
-                    if (!links_1.hasReportedStatementInAmbientContext) {
-                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
-                    }
-                }
-                else {
-                }
-            }
-        }
-        function checkGrammarNumericLiteral(node) {
-            // Grammar checking
-            if (node.isOctalLiteral && languageVersion >= 1 /* ES5 */) {
-                return grammarErrorOnNode(node, ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
-            }
-        }
-        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
-            var sourceFile = ts.getSourceFileOfNode(node);
-            if (!hasParseDiagnostics(sourceFile)) {
-                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
-                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span), /*length*/ 0, message, arg0, arg1, arg2));
-                return true;
-            }
-        }
-        var _a;
-    }
-    ts.createTypeChecker = createTypeChecker;
-})(ts || (ts = {}));
-/// <reference path="checker.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var nullSourceMapWriter;
-    // Used for initialize lastEncodedSourceMapSpan and reset lastEncodedSourceMapSpan when updateLastEncodedAndRecordedSpans
-    var defaultLastEncodedSourceMapSpan = {
-        emittedLine: 1,
-        emittedColumn: 1,
-        sourceLine: 1,
-        sourceColumn: 1,
-        sourceIndex: 0
-    };
-    function getNullSourceMapWriter() {
-        if (nullSourceMapWriter === undefined) {
-            nullSourceMapWriter = {
-                getSourceMapData: function () { return undefined; },
-                setSourceFile: function (sourceFile) { },
-                emitStart: function (range) { },
-                emitEnd: function (range, stopOverridingSpan) { },
-                emitPos: function (pos) { },
-                changeEmitSourcePos: function () { },
-                getText: function () { return undefined; },
-                getSourceMappingURL: function () { return undefined; },
-                initialize: function (filePath, sourceMapFilePath, sourceFiles, isBundledEmit) { },
-                reset: function () { }
-            };
-        }
-        return nullSourceMapWriter;
-    }
-    ts.getNullSourceMapWriter = getNullSourceMapWriter;
-    function createSourceMapWriter(host, writer) {
-        var compilerOptions = host.getCompilerOptions();
-        var currentSourceFile;
-        var sourceMapDir; // The directory in which sourcemap will be
-        var stopOverridingSpan = false;
-        var modifyLastSourcePos = false;
-        // Current source map file and its index in the sources list
-        var sourceMapSourceIndex;
-        // Last recorded and encoded spans
-        var lastRecordedSourceMapSpan;
-        var lastEncodedSourceMapSpan;
-        var lastEncodedNameIndex;
-        // Source map data
-        var sourceMapData;
-        return {
-            getSourceMapData: function () { return sourceMapData; },
-            setSourceFile: setSourceFile,
-            emitPos: emitPos,
-            emitStart: emitStart,
-            emitEnd: emitEnd,
-            changeEmitSourcePos: changeEmitSourcePos,
-            getText: getText,
-            getSourceMappingURL: getSourceMappingURL,
-            initialize: initialize,
-            reset: reset
-        };
-        function initialize(filePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
-            if (sourceMapData) {
-                reset();
-            }
-            currentSourceFile = undefined;
-            // Current source map file and its index in the sources list
-            sourceMapSourceIndex = -1;
-            // Last recorded and encoded spans
-            lastRecordedSourceMapSpan = undefined;
-            lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
-            lastEncodedNameIndex = 0;
-            // Initialize source map data
-            sourceMapData = {
-                sourceMapFilePath: sourceMapFilePath,
-                jsSourceMappingURL: !compilerOptions.inlineSourceMap ? ts.getBaseFileName(ts.normalizeSlashes(sourceMapFilePath)) : undefined,
-                sourceMapFile: ts.getBaseFileName(ts.normalizeSlashes(filePath)),
-                sourceMapSourceRoot: compilerOptions.sourceRoot || "",
-                sourceMapSources: [],
-                inputSourceFileNames: [],
-                sourceMapNames: [],
-                sourceMapMappings: "",
-                sourceMapSourcesContent: compilerOptions.inlineSources ? [] : undefined,
-                sourceMapDecodedMappings: []
-            };
-            // Normalize source root and make sure it has trailing "/" so that it can be used to combine paths with the
-            // relative paths of the sources list in the sourcemap
-            sourceMapData.sourceMapSourceRoot = ts.normalizeSlashes(sourceMapData.sourceMapSourceRoot);
-            if (sourceMapData.sourceMapSourceRoot.length && sourceMapData.sourceMapSourceRoot.charCodeAt(sourceMapData.sourceMapSourceRoot.length - 1) !== 47 /* slash */) {
-                sourceMapData.sourceMapSourceRoot += ts.directorySeparator;
-            }
-            if (compilerOptions.mapRoot) {
-                sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
-                if (!isBundledEmit) {
-                    ts.Debug.assert(sourceFiles.length === 1);
-                    // For modules or multiple emit files the mapRoot will have directory structure like the sources
-                    // So if src\a.ts and src\lib\b.ts are compiled together user would be moving the maps into mapRoot\a.js.map and mapRoot\lib\b.js.map
-                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFiles[0], host, sourceMapDir));
-                }
-                if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
-                    // The relative paths are relative to the common directory
-                    sourceMapDir = ts.combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
-                    sourceMapData.jsSourceMappingURL = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizePath(filePath)), // get the relative sourceMapDir path based on jsFilePath
-                    ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), // this is where user expects to see sourceMap
-                    host.getCurrentDirectory(), host.getCanonicalFileName, 
-                    /*isAbsolutePathAnUrl*/ true);
-                }
-                else {
-                    sourceMapData.jsSourceMappingURL = ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL);
-                }
-            }
-            else {
-                sourceMapDir = ts.getDirectoryPath(ts.normalizePath(filePath));
-            }
-        }
-        function reset() {
-            currentSourceFile = undefined;
-            sourceMapDir = undefined;
-            sourceMapSourceIndex = undefined;
-            lastRecordedSourceMapSpan = undefined;
-            lastEncodedSourceMapSpan = undefined;
-            lastEncodedNameIndex = undefined;
-            sourceMapData = undefined;
-        }
-        function updateLastEncodedAndRecordedSpans() {
-            if (modifyLastSourcePos) {
-                // Reset the source pos
-                modifyLastSourcePos = false;
-                // Change Last recorded Map with last encoded emit line and character
-                lastRecordedSourceMapSpan.emittedLine = lastEncodedSourceMapSpan.emittedLine;
-                lastRecordedSourceMapSpan.emittedColumn = lastEncodedSourceMapSpan.emittedColumn;
-                // Pop sourceMapDecodedMappings to remove last entry
-                sourceMapData.sourceMapDecodedMappings.pop();
-                // Point the lastEncodedSourceMapSpace to the previous encoded sourceMapSpan
-                // If the list is empty which indicates that we are at the beginning of the file,
-                // we have to reset it to default value (same value when we first initialize sourceMapWriter)
-                lastEncodedSourceMapSpan = sourceMapData.sourceMapDecodedMappings.length ?
-                    sourceMapData.sourceMapDecodedMappings[sourceMapData.sourceMapDecodedMappings.length - 1] :
-                    defaultLastEncodedSourceMapSpan;
-                // TODO: Update lastEncodedNameIndex 
-                // Since we dont support this any more, lets not worry about it right now.
-                // When we start supporting nameIndex, we will get back to this
-                // Change the encoded source map
-                var sourceMapMappings = sourceMapData.sourceMapMappings;
-                var lenthToSet = sourceMapMappings.length - 1;
-                for (; lenthToSet >= 0; lenthToSet--) {
-                    var currentChar = sourceMapMappings.charAt(lenthToSet);
-                    if (currentChar === ",") {
-                        // Separator for the entry found
-                        break;
-                    }
-                    if (currentChar === ";" && lenthToSet !== 0 && sourceMapMappings.charAt(lenthToSet - 1) !== ";") {
-                        // Last line separator found
-                        break;
-                    }
-                }
-                sourceMapData.sourceMapMappings = sourceMapMappings.substr(0, Math.max(0, lenthToSet));
-            }
-        }
-        // Encoding for sourcemap span
-        function encodeLastRecordedSourceMapSpan() {
-            if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) {
-                return;
-            }
-            var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn;
-            // Line/Comma delimiters
-            if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) {
-                // Emit comma to separate the entry
-                if (sourceMapData.sourceMapMappings) {
-                    sourceMapData.sourceMapMappings += ",";
-                }
-            }
-            else {
-                // Emit line delimiters
-                for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) {
-                    sourceMapData.sourceMapMappings += ";";
-                }
-                prevEncodedEmittedColumn = 1;
-            }
-            // 1. Relative Column 0 based
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn);
-            // 2. Relative sourceIndex
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex);
-            // 3. Relative sourceLine 0 based
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine);
-            // 4. Relative sourceColumn 0 based
-            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn);
-            // 5. Relative namePosition 0 based
-            if (lastRecordedSourceMapSpan.nameIndex >= 0) {
-                ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this");
-                sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex);
-                lastEncodedNameIndex = lastRecordedSourceMapSpan.nameIndex;
-            }
-            lastEncodedSourceMapSpan = lastRecordedSourceMapSpan;
-            sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan);
-        }
-        function emitPos(pos) {
-            if (pos === -1) {
-                return;
-            }
-            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSourceFile, pos);
-            // Convert the location to be one-based.
-            sourceLinePos.line++;
-            sourceLinePos.character++;
-            var emittedLine = writer.getLine();
-            var emittedColumn = writer.getColumn();
-            // If this location wasn't recorded or the location in source is going backwards, record the span
-            if (!lastRecordedSourceMapSpan ||
-                lastRecordedSourceMapSpan.emittedLine !== emittedLine ||
-                lastRecordedSourceMapSpan.emittedColumn !== emittedColumn ||
-                (lastRecordedSourceMapSpan.sourceIndex === sourceMapSourceIndex &&
-                    (lastRecordedSourceMapSpan.sourceLine > sourceLinePos.line ||
-                        (lastRecordedSourceMapSpan.sourceLine === sourceLinePos.line && lastRecordedSourceMapSpan.sourceColumn > sourceLinePos.character)))) {
-                // Encode the last recordedSpan before assigning new
-                encodeLastRecordedSourceMapSpan();
-                // New span
-                lastRecordedSourceMapSpan = {
-                    emittedLine: emittedLine,
-                    emittedColumn: emittedColumn,
-                    sourceLine: sourceLinePos.line,
-                    sourceColumn: sourceLinePos.character,
-                    sourceIndex: sourceMapSourceIndex
-                };
-                stopOverridingSpan = false;
-            }
-            else if (!stopOverridingSpan) {
-                // Take the new pos instead since there is no change in emittedLine and column since last location
-                lastRecordedSourceMapSpan.sourceLine = sourceLinePos.line;
-                lastRecordedSourceMapSpan.sourceColumn = sourceLinePos.character;
-                lastRecordedSourceMapSpan.sourceIndex = sourceMapSourceIndex;
-            }
-            updateLastEncodedAndRecordedSpans();
-        }
-        function getStartPos(range) {
-            var rangeHasDecorators = !!range.decorators;
-            return range.pos !== -1 ? ts.skipTrivia(currentSourceFile.text, rangeHasDecorators ? range.decorators.end : range.pos) : -1;
-        }
-        function emitStart(range) {
-            emitPos(getStartPos(range));
-        }
-        function emitEnd(range, stopOverridingEnd) {
-            emitPos(range.end);
-            stopOverridingSpan = stopOverridingEnd;
-        }
-        function changeEmitSourcePos() {
-            ts.Debug.assert(!modifyLastSourcePos);
-            modifyLastSourcePos = true;
-        }
-        function setSourceFile(sourceFile) {
-            currentSourceFile = sourceFile;
-            // Add the file to tsFilePaths
-            // If sourceroot option: Use the relative path corresponding to the common directory path
-            // otherwise source locations relative to map file location
-            var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
-            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSourceFile.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
-            /*isAbsolutePathAnUrl*/ true);
-            sourceMapSourceIndex = ts.indexOf(sourceMapData.sourceMapSources, source);
-            if (sourceMapSourceIndex === -1) {
-                sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
-                sourceMapData.sourceMapSources.push(source);
-                // The one that can be used from program to get the actual source file
-                sourceMapData.inputSourceFileNames.push(sourceFile.fileName);
-                if (compilerOptions.inlineSources) {
-                    sourceMapData.sourceMapSourcesContent.push(sourceFile.text);
-                }
-            }
-        }
-        function getText() {
-            encodeLastRecordedSourceMapSpan();
-            return ts.stringify({
-                version: 3,
-                file: sourceMapData.sourceMapFile,
-                sourceRoot: sourceMapData.sourceMapSourceRoot,
-                sources: sourceMapData.sourceMapSources,
-                names: sourceMapData.sourceMapNames,
-                mappings: sourceMapData.sourceMapMappings,
-                sourcesContent: sourceMapData.sourceMapSourcesContent
-            });
-        }
-        function getSourceMappingURL() {
-            if (compilerOptions.inlineSourceMap) {
-                // Encode the sourceMap into the sourceMap url
-                var base64SourceMapText = ts.convertToBase64(getText());
-                return sourceMapData.jsSourceMappingURL = "data:application/json;base64," + base64SourceMapText;
-            }
-            else {
-                return sourceMapData.jsSourceMappingURL;
-            }
-        }
-    }
-    ts.createSourceMapWriter = createSourceMapWriter;
-    var base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-    function base64FormatEncode(inValue) {
-        if (inValue < 64) {
-            return base64Chars.charAt(inValue);
-        }
-        throw TypeError(inValue + ": not a 64 based value");
-    }
-    function base64VLQFormatEncode(inValue) {
-        // Add a new least significant bit that has the sign of the value.
-        // if negative number the least significant bit that gets added to the number has value 1
-        // else least significant bit value that gets added is 0
-        // eg. -1 changes to binary : 01 [1] => 3
-        //     +1 changes to binary : 01 [0] => 2
-        if (inValue < 0) {
-            inValue = ((-inValue) << 1) + 1;
-        }
-        else {
-            inValue = inValue << 1;
-        }
-        // Encode 5 bits at a time starting from least significant bits
-        var encodedStr = "";
-        do {
-            var currentDigit = inValue & 31; // 11111
-            inValue = inValue >> 5;
-            if (inValue > 0) {
-                // There are still more digits to decode, set the msb (6th bit)
-                currentDigit = currentDigit | 32;
-            }
-            encodedStr = encodedStr + base64FormatEncode(currentDigit);
-        } while (inValue > 0);
-        return encodedStr;
-    }
-})(ts || (ts = {}));
-/// <reference path="checker.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
-        var declarationDiagnostics = ts.createDiagnosticCollection();
-        ts.forEachExpectedEmitFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
-        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
-        function getDeclarationDiagnosticsFromFile(_a, sources, isBundledEmit) {
-            var declarationFilePath = _a.declarationFilePath;
-            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sources, isBundledEmit);
-        }
-    }
-    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
-    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit) {
-        var newLine = host.getNewLine();
-        var compilerOptions = host.getCompilerOptions();
-        var write;
-        var writeLine;
-        var increaseIndent;
-        var decreaseIndent;
-        var writeTextOfNode;
-        var writer;
-        createAndSetNewTextWriterWithSymbolWriter();
-        var enclosingDeclaration;
-        var resultHasExternalModuleIndicator;
-        var currentText;
-        var currentLineMap;
-        var currentIdentifiers;
-        var isCurrentFileExternalModule;
-        var reportedDeclarationError = false;
-        var errorNameNode;
-        var emitJsDocComments = compilerOptions.removeComments ? function (declaration) { } : writeJsDocComments;
-        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
-        var noDeclare;
-        var moduleElementDeclarationEmitInfo = [];
-        var asynchronousSubModuleDeclarationEmitInfo;
-        // Contains the reference paths that needs to go in the declaration file.
-        // Collecting this separately because reference paths need to be first thing in the declaration file
-        // and we could be collecting these paths from multiple files into single one with --out option
-        var referencesOutput = "";
-        var usedTypeDirectiveReferences;
-        // Emit references corresponding to each file
-        var emittedReferencedFiles = [];
-        var addedGlobalFileReference = false;
-        var allSourcesModuleElementDeclarationEmitInfo = [];
-        ts.forEach(sourceFiles, function (sourceFile) {
-            // Dont emit for javascript file
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                return;
-            }
-            // Check what references need to be added
-            if (!compilerOptions.noResolve) {
-                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
-                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
-                    // Emit reference in dts, if the file reference was not already emitted
-                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
-                        // Add a reference to generated dts file,
-                        // global file reference is added only 
-                        //  - if it is not bundled emit (because otherwise it would be self reference)
-                        //  - and it is not already added
-                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference)) {
-                            addedGlobalFileReference = true;
-                        }
-                        emittedReferencedFiles.push(referencedFile);
-                    }
-                });
-            }
-            resultHasExternalModuleIndicator = false;
-            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
-                noDeclare = false;
-                emitSourceFile(sourceFile);
-            }
-            else if (ts.isExternalModule(sourceFile)) {
-                noDeclare = true;
-                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
-                writeLine();
-                increaseIndent();
-                emitSourceFile(sourceFile);
-                decreaseIndent();
-                write("}");
-                writeLine();
-            }
-            // create asynchronous output for the importDeclarations
-            if (moduleElementDeclarationEmitInfo.length) {
-                var oldWriter = writer;
-                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
-                        ts.Debug.assert(aliasEmitInfo.node.kind === 230 /* ImportDeclaration */);
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            increaseIndent();
-                        }
-                        writeImportDeclaration(aliasEmitInfo.node);
-                        aliasEmitInfo.asynchronousOutput = writer.getText();
-                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
-                            decreaseIndent();
-                        }
-                    }
-                });
-                setWriter(oldWriter);
-                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
-                moduleElementDeclarationEmitInfo = [];
-            }
-            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
-                // if file was external module with augmentations - this fact should be preserved in .d.ts as well.
-                // in case if we didn't write any external module specifiers in .d.ts we need to emit something 
-                // that will force compiler to think that this file is an external module - 'export {}' is a reasonable choice here.
-                write("export {};");
-                writeLine();
-            }
-        });
-        if (usedTypeDirectiveReferences) {
-            for (var directive in usedTypeDirectiveReferences) {
-                if (ts.hasProperty(usedTypeDirectiveReferences, directive)) {
-                    referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
-                }
-            }
-        }
-        return {
-            reportedDeclarationError: reportedDeclarationError,
-            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
-            synchronousDeclarationOutput: writer.getText(),
-            referencesOutput: referencesOutput
-        };
-        function hasInternalAnnotation(range) {
-            var comment = currentText.substring(range.pos, range.end);
-            return comment.indexOf("@internal") >= 0;
-        }
-        function stripInternal(node) {
-            if (node) {
-                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
-                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
-                    return;
-                }
-                emitNode(node);
-            }
-        }
-        function createAndSetNewTextWriterWithSymbolWriter() {
-            var writer = ts.createTextWriter(newLine);
-            writer.trackSymbol = trackSymbol;
-            writer.reportInaccessibleThisError = reportInaccessibleThisError;
-            writer.writeKeyword = writer.write;
-            writer.writeOperator = writer.write;
-            writer.writePunctuation = writer.write;
-            writer.writeSpace = writer.write;
-            writer.writeStringLiteral = writer.writeLiteral;
-            writer.writeParameter = writer.write;
-            writer.writeSymbol = writer.write;
-            setWriter(writer);
-        }
-        function setWriter(newWriter) {
-            writer = newWriter;
-            write = newWriter.write;
-            writeTextOfNode = newWriter.writeTextOfNode;
-            writeLine = newWriter.writeLine;
-            increaseIndent = newWriter.increaseIndent;
-            decreaseIndent = newWriter.decreaseIndent;
-        }
-        function writeAsynchronousModuleElements(nodes) {
-            var oldWriter = writer;
-            ts.forEach(nodes, function (declaration) {
-                var nodeToCheck;
-                if (declaration.kind === 218 /* VariableDeclaration */) {
-                    nodeToCheck = declaration.parent.parent;
-                }
-                else if (declaration.kind === 233 /* NamedImports */ || declaration.kind === 234 /* ImportSpecifier */ || declaration.kind === 231 /* ImportClause */) {
-                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
-                }
-                else {
-                    nodeToCheck = declaration;
-                }
-                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
-                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
-                }
-                // If the alias was marked as not visible when we saw its declaration, we would have saved the aliasEmitInfo, but if we haven't yet visited the alias declaration
-                // then we don't need to write it at this point. We will write it when we actually see its declaration
-                // Eg.
-                // export function bar(a: foo.Foo) { }
-                // import foo = require("foo");
-                // Writing of function bar would mark alias declaration foo as visible but we haven't yet visited that declaration so do nothing,
-                // we would write alias foo declaration when we visit it since it would now be marked as visible
-                if (moduleElementEmitInfo) {
-                    if (moduleElementEmitInfo.node.kind === 230 /* ImportDeclaration */) {
-                        // we have to create asynchronous output only after we have collected complete information
-                        // because it is possible to enable multiple bindings as asynchronously visible
-                        moduleElementEmitInfo.isVisible = true;
-                    }
-                    else {
-                        createAndSetNewTextWriterWithSymbolWriter();
-                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
-                            increaseIndent();
-                        }
-                        if (nodeToCheck.kind === 225 /* ModuleDeclaration */) {
-                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
-                            asynchronousSubModuleDeclarationEmitInfo = [];
-                        }
-                        writeModuleElement(nodeToCheck);
-                        if (nodeToCheck.kind === 225 /* ModuleDeclaration */) {
-                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
-                            asynchronousSubModuleDeclarationEmitInfo = undefined;
-                        }
-                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
-                    }
-                }
-            });
-            setWriter(oldWriter);
-        }
-        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
-            if (!typeReferenceDirectives) {
-                return;
-            }
-            if (!usedTypeDirectiveReferences) {
-                usedTypeDirectiveReferences = {};
-            }
-            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
-                var directive = typeReferenceDirectives_1[_i];
-                if (!ts.hasProperty(usedTypeDirectiveReferences, directive)) {
-                    usedTypeDirectiveReferences[directive] = directive;
-                }
-            }
-        }
-        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
-            if (symbolAccessibilityResult.accessibility === 0 /* Accessible */) {
-                // write the aliases
-                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
-                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
-                }
-            }
-            else {
-                // Report error
-                reportedDeclarationError = true;
-                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
-                if (errorInfo) {
-                    if (errorInfo.typeName) {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                    else {
-                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
-                    }
-                }
-            }
-        }
-        function trackSymbol(symbol, enclosingDeclaration, meaning) {
-            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning));
-            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
-        }
-        function reportInaccessibleThisError() {
-            if (errorNameNode) {
-                reportedDeclarationError = true;
-                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
-            }
-        }
-        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (type) {
-                // Write the type
-                emitType(type);
-            }
-            else {
-                errorNameNode = declaration.name;
-                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            write(": ");
-            if (signature.type) {
-                // Write the type
-                emitType(signature.type);
-            }
-            else {
-                errorNameNode = signature.name;
-                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
-                errorNameNode = undefined;
-            }
-        }
-        function emitLines(nodes) {
-            for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
-                var node = nodes_2[_i];
-                emit(node);
-            }
-        }
-        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
-            var currentWriterPos = writer.getTextPos();
-            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
-                var node = nodes_3[_i];
-                if (!canEmitFn || canEmitFn(node)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        write(separator);
-                    }
-                    currentWriterPos = writer.getTextPos();
-                    eachNodeEmitFn(node);
-                }
-            }
-        }
-        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
-            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
-        }
-        function writeJsDocComments(declaration) {
-            if (declaration) {
-                var jsDocComments = ts.getJsDocCommentsFromText(declaration, currentText);
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
-                // jsDoc comments are emitted at /*leading comment1 */space/*leading comment*/space
-                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, /*trailingSeparator*/ true, newLine, ts.writeCommentRange);
-            }
-        }
-        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
-            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
-            emitType(type);
-        }
-        function emitType(type) {
-            switch (type.kind) {
-                case 117 /* AnyKeyword */:
-                case 132 /* StringKeyword */:
-                case 130 /* NumberKeyword */:
-                case 120 /* BooleanKeyword */:
-                case 133 /* SymbolKeyword */:
-                case 103 /* VoidKeyword */:
-                case 135 /* UndefinedKeyword */:
-                case 93 /* NullKeyword */:
-                case 127 /* NeverKeyword */:
-                case 165 /* ThisType */:
-                case 166 /* StringLiteralType */:
-                    return writeTextOfNode(currentText, type);
-                case 194 /* ExpressionWithTypeArguments */:
-                    return emitExpressionWithTypeArguments(type);
-                case 155 /* TypeReference */:
-                    return emitTypeReference(type);
-                case 158 /* TypeQuery */:
-                    return emitTypeQuery(type);
-                case 160 /* ArrayType */:
-                    return emitArrayType(type);
-                case 161 /* TupleType */:
-                    return emitTupleType(type);
-                case 162 /* UnionType */:
-                    return emitUnionType(type);
-                case 163 /* IntersectionType */:
-                    return emitIntersectionType(type);
-                case 164 /* ParenthesizedType */:
-                    return emitParenType(type);
-                case 156 /* FunctionType */:
-                case 157 /* ConstructorType */:
-                    return emitSignatureDeclarationWithJsDocComments(type);
-                case 159 /* TypeLiteral */:
-                    return emitTypeLiteral(type);
-                case 69 /* Identifier */:
-                    return emitEntityName(type);
-                case 139 /* QualifiedName */:
-                    return emitEntityName(type);
-                case 154 /* TypePredicate */:
-                    return emitTypePredicate(type);
-            }
-            function writeEntityName(entityName) {
-                if (entityName.kind === 69 /* Identifier */) {
-                    writeTextOfNode(currentText, entityName);
-                }
-                else {
-                    var left = entityName.kind === 139 /* QualifiedName */ ? entityName.left : entityName.expression;
-                    var right = entityName.kind === 139 /* QualifiedName */ ? entityName.right : entityName.name;
-                    writeEntityName(left);
-                    write(".");
-                    writeTextOfNode(currentText, right);
-                }
-            }
-            function emitEntityName(entityName) {
-                var visibilityResult = resolver.isEntityNameVisible(entityName, 
-                // Aliases can be written asynchronously so use correct enclosing declaration
-                entityName.parent.kind === 229 /* ImportEqualsDeclaration */ ? entityName.parent : enclosingDeclaration);
-                handleSymbolAccessibilityError(visibilityResult);
-                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
-                writeEntityName(entityName);
-            }
-            function emitExpressionWithTypeArguments(node) {
-                if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                    ts.Debug.assert(node.expression.kind === 69 /* Identifier */ || node.expression.kind === 172 /* PropertyAccessExpression */);
-                    emitEntityName(node.expression);
-                    if (node.typeArguments) {
-                        write("<");
-                        emitCommaList(node.typeArguments, emitType);
-                        write(">");
-                    }
-                }
-            }
-            function emitTypeReference(type) {
-                emitEntityName(type.typeName);
-                if (type.typeArguments) {
-                    write("<");
-                    emitCommaList(type.typeArguments, emitType);
-                    write(">");
-                }
-            }
-            function emitTypePredicate(type) {
-                writeTextOfNode(currentText, type.parameterName);
-                write(" is ");
-                emitType(type.type);
-            }
-            function emitTypeQuery(type) {
-                write("typeof ");
-                emitEntityName(type.exprName);
-            }
-            function emitArrayType(type) {
-                emitType(type.elementType);
-                write("[]");
-            }
-            function emitTupleType(type) {
-                write("[");
-                emitCommaList(type.elementTypes, emitType);
-                write("]");
-            }
-            function emitUnionType(type) {
-                emitSeparatedList(type.types, " | ", emitType);
-            }
-            function emitIntersectionType(type) {
-                emitSeparatedList(type.types, " & ", emitType);
-            }
-            function emitParenType(type) {
-                write("(");
-                emitType(type.type);
-                write(")");
-            }
-            function emitTypeLiteral(type) {
-                write("{");
-                if (type.members.length) {
-                    writeLine();
-                    increaseIndent();
-                    // write members
-                    emitLines(type.members);
-                    decreaseIndent();
-                }
-                write("}");
-            }
-        }
-        function emitSourceFile(node) {
-            currentText = node.text;
-            currentLineMap = ts.getLineStarts(node);
-            currentIdentifiers = node.identifiers;
-            isCurrentFileExternalModule = ts.isExternalModule(node);
-            enclosingDeclaration = node;
-            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, true /* remove comments */);
-            emitLines(node.statements);
-        }
-        // Return a temp variable name to be used in `export default` statements.
-        // The temp name will be of the form _default_counter.
-        // Note that export default is only allowed at most once in a module, so we
-        // do not need to keep track of created temp names.
-        function getExportDefaultTempVariableName() {
-            var baseName = "_default";
-            if (!ts.hasProperty(currentIdentifiers, baseName)) {
-                return baseName;
-            }
-            var count = 0;
-            while (true) {
-                count++;
-                var name_22 = baseName + "_" + count;
-                if (!ts.hasProperty(currentIdentifiers, name_22)) {
-                    return name_22;
-                }
-            }
-        }
-        function emitExportAssignment(node) {
-            if (node.expression.kind === 69 /* Identifier */) {
-                write(node.isExportEquals ? "export = " : "export default ");
-                writeTextOfNode(currentText, node.expression);
-            }
-            else {
-                // Expression
-                var tempVarName = getExportDefaultTempVariableName();
-                if (!noDeclare) {
-                    write("declare ");
-                }
-                write("var ");
-                write(tempVarName);
-                write(": ");
-                writer.getSymbolAccessibilityDiagnostic = getDefaultExportAccessibilityDiagnostic;
-                resolver.writeTypeOfExpression(node.expression, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
-                write(";");
-                writeLine();
-                write(node.isExportEquals ? "export = " : "export default ");
-                write(tempVarName);
-            }
-            write(";");
-            writeLine();
-            // Make all the declarations visible for the export name
-            if (node.expression.kind === 69 /* Identifier */) {
-                var nodes = resolver.collectLinkedAliases(node.expression);
-                // write each of these declarations asynchronously
-                writeAsynchronousModuleElements(nodes);
-            }
-            function getDefaultExportAccessibilityDiagnostic(diagnostic) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
-                    errorNode: node
-                };
-            }
-        }
-        function isModuleElementVisible(node) {
-            return resolver.isDeclarationVisible(node);
-        }
-        function emitModuleElement(node, isModuleElementVisible) {
-            if (isModuleElementVisible) {
-                writeModuleElement(node);
-            }
-            else if (node.kind === 229 /* ImportEqualsDeclaration */ ||
-                (node.parent.kind === 256 /* SourceFile */ && isCurrentFileExternalModule)) {
-                var isVisible = void 0;
-                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 256 /* SourceFile */) {
-                    // Import declaration of another module that is visited async so lets put it in right spot
-                    asynchronousSubModuleDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-                else {
-                    if (node.kind === 230 /* ImportDeclaration */) {
-                        var importDeclaration = node;
-                        if (importDeclaration.importClause) {
-                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
-                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
-                        }
-                    }
-                    moduleElementDeclarationEmitInfo.push({
-                        node: node,
-                        outputPos: writer.getTextPos(),
-                        indent: writer.getIndent(),
-                        isVisible: isVisible
-                    });
-                }
-            }
-        }
-        function writeModuleElement(node) {
-            switch (node.kind) {
-                case 220 /* FunctionDeclaration */:
-                    return writeFunctionDeclaration(node);
-                case 200 /* VariableStatement */:
-                    return writeVariableStatement(node);
-                case 222 /* InterfaceDeclaration */:
-                    return writeInterfaceDeclaration(node);
-                case 221 /* ClassDeclaration */:
-                    return writeClassDeclaration(node);
-                case 223 /* TypeAliasDeclaration */:
-                    return writeTypeAliasDeclaration(node);
-                case 224 /* EnumDeclaration */:
-                    return writeEnumDeclaration(node);
-                case 225 /* ModuleDeclaration */:
-                    return writeModuleDeclaration(node);
-                case 229 /* ImportEqualsDeclaration */:
-                    return writeImportEqualsDeclaration(node);
-                case 230 /* ImportDeclaration */:
-                    return writeImportDeclaration(node);
-                default:
-                    ts.Debug.fail("Unknown symbol kind");
-            }
-        }
-        function emitModuleElementDeclarationFlags(node) {
-            // If the node is parented in the current source file we need to emit export declare or just export
-            if (node.parent.kind === 256 /* SourceFile */) {
-                // If the node is exported
-                if (node.flags & 1 /* Export */) {
-                    write("export ");
-                }
-                if (node.flags & 512 /* Default */) {
-                    write("default ");
-                }
-                else if (node.kind !== 222 /* InterfaceDeclaration */ && !noDeclare) {
-                    write("declare ");
-                }
-            }
-        }
-        function emitClassMemberDeclarationFlags(flags) {
-            if (flags & 8 /* Private */) {
-                write("private ");
-            }
-            else if (flags & 16 /* Protected */) {
-                write("protected ");
-            }
-            if (flags & 32 /* Static */) {
-                write("static ");
-            }
-            if (flags & 64 /* Readonly */) {
-                write("readonly ");
-            }
-            if (flags & 128 /* Abstract */) {
-                write("abstract ");
-            }
-        }
-        function writeImportEqualsDeclaration(node) {
-            // note usage of writer. methods instead of aliases created, just to make sure we are using
-            // correct writer especially to handle asynchronous alias writing
-            emitJsDocComments(node);
-            if (node.flags & 1 /* Export */) {
-                write("export ");
-            }
-            write("import ");
-            writeTextOfNode(currentText, node.name);
-            write(" = ");
-            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
-                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
-                write(";");
-            }
-            else {
-                write("require(");
-                emitExternalModuleSpecifier(node);
-                write(");");
-            }
-            writer.writeLine();
-            function getImportEntityNameVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
-                    errorNode: node,
-                    typeName: node.name
-                };
-            }
-        }
-        function isVisibleNamedBinding(namedBindings) {
-            if (namedBindings) {
-                if (namedBindings.kind === 232 /* NamespaceImport */) {
-                    return resolver.isDeclarationVisible(namedBindings);
-                }
-                else {
-                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
-                }
-            }
-        }
-        function writeImportDeclaration(node) {
-            emitJsDocComments(node);
-            if (node.flags & 1 /* Export */) {
-                write("export ");
-            }
-            write("import ");
-            if (node.importClause) {
-                var currentWriterPos = writer.getTextPos();
-                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
-                    writeTextOfNode(currentText, node.importClause.name);
-                }
-                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
-                    if (currentWriterPos !== writer.getTextPos()) {
-                        // If the default binding was emitted, write the separated
-                        write(", ");
-                    }
-                    if (node.importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                        write("* as ");
-                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
-                    }
-                    else {
-                        write("{ ");
-                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
-                        write(" }");
-                    }
-                }
-                write(" from ");
-            }
-            emitExternalModuleSpecifier(node);
-            write(";");
-            writer.writeLine();
-        }
-        function emitExternalModuleSpecifier(parent) {
-            // emitExternalModuleSpecifier is usually called when we emit something in the.d.ts file that will make it an external module (i.e. import/export declarations).
-            // the only case when it is not true is when we call it to emit correct name for module augmentation - d.ts files with just module augmentations are not considered 
-            // external modules since they are indistinguishable from script files with ambient modules. To fix this in such d.ts files we'll emit top level 'export {}'
-            // so compiler will treat them as external modules.
-            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 225 /* ModuleDeclaration */;
-            var moduleSpecifier;
-            if (parent.kind === 229 /* ImportEqualsDeclaration */) {
-                var node = parent;
-                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
-            }
-            else if (parent.kind === 225 /* ModuleDeclaration */) {
-                moduleSpecifier = parent.name;
-            }
-            else {
-                var node = parent;
-                moduleSpecifier = node.moduleSpecifier;
-            }
-            if (moduleSpecifier.kind === 9 /* StringLiteral */ && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
-                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
-                if (moduleName) {
-                    write('"');
-                    write(moduleName);
-                    write('"');
-                    return;
-                }
-            }
-            writeTextOfNode(currentText, moduleSpecifier);
-        }
-        function emitImportOrExportSpecifier(node) {
-            if (node.propertyName) {
-                writeTextOfNode(currentText, node.propertyName);
-                write(" as ");
-            }
-            writeTextOfNode(currentText, node.name);
-        }
-        function emitExportSpecifier(node) {
-            emitImportOrExportSpecifier(node);
-            // Make all the declarations visible for the export name
-            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
-            // write each of these declarations asynchronously
-            writeAsynchronousModuleElements(nodes);
-        }
-        function emitExportDeclaration(node) {
-            emitJsDocComments(node);
-            write("export ");
-            if (node.exportClause) {
-                write("{ ");
-                emitCommaList(node.exportClause.elements, emitExportSpecifier);
-                write(" }");
-            }
-            else {
-                write("*");
-            }
-            if (node.moduleSpecifier) {
-                write(" from ");
-                emitExternalModuleSpecifier(node);
-            }
-            write(";");
-            writer.writeLine();
-        }
-        function writeModuleDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isGlobalScopeAugmentation(node)) {
-                write("global ");
-            }
-            else {
-                if (node.flags & 4096 /* Namespace */) {
-                    write("namespace ");
-                }
-                else {
-                    write("module ");
-                }
-                if (ts.isExternalModuleAugmentation(node)) {
-                    emitExternalModuleSpecifier(node);
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                }
-            }
-            while (node.body.kind !== 226 /* ModuleBlock */) {
-                node = node.body;
-                write(".");
-                writeTextOfNode(currentText, node.name);
-            }
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.body.statements);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function writeTypeAliasDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("type ");
-            writeTextOfNode(currentText, node.name);
-            emitTypeParameters(node.typeParameters);
-            write(" = ");
-            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
-            write(";");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-            function getTypeAliasDeclarationVisibilityError(symbolAccessibilityResult) {
-                return {
-                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
-                    errorNode: node.type,
-                    typeName: node.name
-                };
-            }
-        }
-        function writeEnumDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isConst(node)) {
-                write("const ");
-            }
-            write("enum ");
-            writeTextOfNode(currentText, node.name);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-        }
-        function emitEnumMemberDeclaration(node) {
-            emitJsDocComments(node);
-            writeTextOfNode(currentText, node.name);
-            var enumMemberValue = resolver.getConstantValue(node);
-            if (enumMemberValue !== undefined) {
-                write(" = ");
-                write(enumMemberValue.toString());
-            }
-            write(",");
-            writeLine();
-        }
-        function isPrivateMethodTypeParameter(node) {
-            return node.parent.kind === 147 /* MethodDeclaration */ && (node.parent.flags & 8 /* Private */);
-        }
-        function emitTypeParameters(typeParameters) {
-            function emitTypeParameter(node) {
-                increaseIndent();
-                emitJsDocComments(node);
-                decreaseIndent();
-                writeTextOfNode(currentText, node.name);
-                // If there is constraint present and this is not a type parameter of the private method emit the constraint
-                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
-                    write(" extends ");
-                    if (node.parent.kind === 156 /* FunctionType */ ||
-                        node.parent.kind === 157 /* ConstructorType */ ||
-                        (node.parent.parent && node.parent.parent.kind === 159 /* TypeLiteral */)) {
-                        ts.Debug.assert(node.parent.kind === 147 /* MethodDeclaration */ ||
-                            node.parent.kind === 146 /* MethodSignature */ ||
-                            node.parent.kind === 156 /* FunctionType */ ||
-                            node.parent.kind === 157 /* ConstructorType */ ||
-                            node.parent.kind === 151 /* CallSignature */ ||
-                            node.parent.kind === 152 /* ConstructSignature */);
-                        emitType(node.constraint);
-                    }
-                    else {
-                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
-                    }
-                }
-                function getTypeParameterConstraintVisibilityError(symbolAccessibilityResult) {
-                    // Type parameter constraints are named by user so we should always be able to name it
-                    var diagnosticMessage;
-                    switch (node.parent.kind) {
-                        case 221 /* ClassDeclaration */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
-                            break;
-                        case 222 /* InterfaceDeclaration */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 152 /* ConstructSignature */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 151 /* CallSignature */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                            break;
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                            if (node.parent.flags & 32 /* Static */) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                            }
-                            else {
-                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
-                            }
-                            break;
-                        case 220 /* FunctionDeclaration */:
-                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                            break;
-                        default:
-                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.name
-                    };
-                }
-            }
-            if (typeParameters) {
-                write("<");
-                emitCommaList(typeParameters, emitTypeParameter);
-                write(">");
-            }
-        }
-        function emitHeritageClause(typeReferences, isImplementsList) {
-            if (typeReferences) {
-                write(isImplementsList ? " implements " : " extends ");
-                emitCommaList(typeReferences, emitTypeOfTypeReference);
-            }
-            function emitTypeOfTypeReference(node) {
-                if (ts.isSupportedExpressionWithTypeArguments(node)) {
-                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
-                }
-                else if (!isImplementsList && node.expression.kind === 93 /* NullKeyword */) {
-                    write("null");
-                }
-                else {
-                    writer.getSymbolAccessibilityDiagnostic = getHeritageClauseVisibilityError;
-                    resolver.writeBaseConstructorTypeOfClass(enclosingDeclaration, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
-                }
-                function getHeritageClauseVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage;
-                    // Heritage clause is written by user so it can always be named
-                    if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
-                        // Class or Interface implemented/extended is inaccessible
-                        diagnosticMessage = isImplementsList ?
-                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
-                            ts.Diagnostics.Extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        // interface is inaccessible
-                        diagnosticMessage = ts.Diagnostics.Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: node,
-                        typeName: node.parent.parent.name
-                    };
-                }
-            }
-        }
-        function writeClassDeclaration(node) {
-            function emitParameterProperties(constructorDeclaration) {
-                if (constructorDeclaration) {
-                    ts.forEach(constructorDeclaration.parameters, function (param) {
-                        if (param.flags & 92 /* ParameterPropertyModifier */) {
-                            emitPropertyDeclaration(param);
-                        }
-                    });
-                }
-            }
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (node.flags & 128 /* Abstract */) {
-                write("abstract ");
-            }
-            write("class ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-            if (baseTypeNode) {
-                emitHeritageClause([baseTypeNode], /*isImplementsList*/ false);
-            }
-            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), /*isImplementsList*/ true);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitParameterProperties(ts.getFirstConstructorWithBody(node));
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function writeInterfaceDeclaration(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            write("interface ");
-            writeTextOfNode(currentText, node.name);
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            emitTypeParameters(node.typeParameters);
-            emitHeritageClause(ts.getInterfaceBaseTypeNodes(node), /*isImplementsList*/ false);
-            write(" {");
-            writeLine();
-            increaseIndent();
-            emitLines(node.members);
-            decreaseIndent();
-            write("}");
-            writeLine();
-            enclosingDeclaration = prevEnclosingDeclaration;
-        }
-        function emitPropertyDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            emitJsDocComments(node);
-            emitClassMemberDeclarationFlags(node.flags);
-            emitVariableDeclaration(node);
-            write(";");
-            writeLine();
-        }
-        function emitVariableDeclaration(node) {
-            // If we are emitting property it isn't moduleElement and hence we already know it needs to be emitted
-            // so there is no check needed to see if declaration is visible
-            if (node.kind !== 218 /* VariableDeclaration */ || resolver.isDeclarationVisible(node)) {
-                if (ts.isBindingPattern(node.name)) {
-                    emitBindingPattern(node.name);
-                }
-                else {
-                    // If this node is a computed name, it can only be a symbol, because we've already skipped
-                    // it if it's not a well known symbol. In that case, the text of the name will be exactly
-                    // what we want, namely the name expression enclosed in brackets.
-                    writeTextOfNode(currentText, node.name);
-                    // If optional property emit ?
-                    if ((node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */ || node.kind === 142 /* Parameter */) && ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                    if ((node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */) && node.parent.kind === 159 /* TypeLiteral */) {
-                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
-                    }
-                    else if (!(node.flags & 8 /* Private */)) {
-                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                if (node.kind === 218 /* VariableDeclaration */) {
-                    return symbolAccessibilityResult.errorModuleName ?
-                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
-                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
-                }
-                else if (node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */) {
-                    // TODO(jfreeman): Deal with computed properties in error reporting.
-                    if (node.flags & 32 /* Static */) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        // Interfaces cannot have types that cannot be named
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
-                    }
-                }
-            }
-            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
-            }
-            function emitBindingPattern(bindingPattern) {
-                // Only select non-omitted expression from the bindingPattern's elements.
-                // We have to do this to avoid emitting trailing commas.
-                // For example:
-                //      original: var [, c,,] = [ 2,3,4]
-                //      emitted: declare var c: number; // instead of declare var c:number, ;
-                var elements = [];
-                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
-                    var element = _a[_i];
-                    if (element.kind !== 193 /* OmittedExpression */) {
-                        elements.push(element);
-                    }
-                }
-                emitCommaList(elements, emitBindingElement);
-            }
-            function emitBindingElement(bindingElement) {
-                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
-                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                    return diagnosticMessage !== undefined ? {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: bindingElement,
-                        typeName: bindingElement.name
-                    } : undefined;
-                }
-                if (bindingElement.name) {
-                    if (ts.isBindingPattern(bindingElement.name)) {
-                        emitBindingPattern(bindingElement.name);
-                    }
-                    else {
-                        writeTextOfNode(currentText, bindingElement.name);
-                        writeTypeOfDeclaration(bindingElement, /*type*/ undefined, getBindingElementTypeVisibilityError);
-                    }
-                }
-            }
-        }
-        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
-            // if this is property of type literal,
-            // or is parameter of method/call/construct/index signature of type literal
-            // emit only if type is specified
-            if (node.type) {
-                write(": ");
-                emitType(node.type);
-            }
-        }
-        function isVariableStatementVisible(node) {
-            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
-        }
-        function writeVariableStatement(node) {
-            emitJsDocComments(node);
-            emitModuleElementDeclarationFlags(node);
-            if (ts.isLet(node.declarationList)) {
-                write("let ");
-            }
-            else if (ts.isConst(node.declarationList)) {
-                write("const ");
-            }
-            else {
-                write("var ");
-            }
-            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
-            write(";");
-            writeLine();
-        }
-        function emitAccessorDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
-            var accessorWithTypeAnnotation;
-            if (node === accessors.firstAccessor) {
-                emitJsDocComments(accessors.getAccessor);
-                emitJsDocComments(accessors.setAccessor);
-                emitClassMemberDeclarationFlags(node.flags | (accessors.setAccessor ? 0 : 64 /* Readonly */));
-                writeTextOfNode(currentText, node.name);
-                if (!(node.flags & 8 /* Private */)) {
-                    accessorWithTypeAnnotation = node;
-                    var type = getTypeAnnotationFromAccessor(node);
-                    if (!type) {
-                        // couldn't get type for the first accessor, try the another one
-                        var anotherAccessor = node.kind === 149 /* GetAccessor */ ? accessors.setAccessor : accessors.getAccessor;
-                        type = getTypeAnnotationFromAccessor(anotherAccessor);
-                        if (type) {
-                            accessorWithTypeAnnotation = anotherAccessor;
-                        }
-                    }
-                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
-                }
-                write(";");
-                writeLine();
-            }
-            function getTypeAnnotationFromAccessor(accessor) {
-                if (accessor) {
-                    return accessor.kind === 149 /* GetAccessor */
-                        ? accessor.type // Getter - return type
-                        : accessor.parameters.length > 0
-                            ? accessor.parameters[0].type // Setter parameter type
-                            : undefined;
-                }
-            }
-            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                if (accessorWithTypeAnnotation.kind === 150 /* SetAccessor */) {
-                    // Setters have to have type named and cannot infer it so, the type should always be named
-                    if (accessorWithTypeAnnotation.parent.flags & 32 /* Static */) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
-                    }
-                    else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.parameters[0],
-                        // TODO(jfreeman): Investigate why we are passing node.name instead of node.parameters[0].name
-                        typeName: accessorWithTypeAnnotation.name
-                    };
-                }
-                else {
-                    if (accessorWithTypeAnnotation.flags & 32 /* Static */) {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
-                    }
-                    else {
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
-                    }
-                    return {
-                        diagnosticMessage: diagnosticMessage,
-                        errorNode: accessorWithTypeAnnotation.name,
-                        typeName: undefined
-                    };
-                }
-            }
-        }
-        function writeFunctionDeclaration(node) {
-            if (ts.hasDynamicName(node)) {
-                return;
-            }
-            // If we are emitting Method/Constructor it isn't moduleElement and hence already determined to be emitting
-            // so no need to verify if the declaration is visible
-            if (!resolver.isImplementationOfOverload(node)) {
-                emitJsDocComments(node);
-                if (node.kind === 220 /* FunctionDeclaration */) {
-                    emitModuleElementDeclarationFlags(node);
-                }
-                else if (node.kind === 147 /* MethodDeclaration */ || node.kind === 148 /* Constructor */) {
-                    emitClassMemberDeclarationFlags(node.flags);
-                }
-                if (node.kind === 220 /* FunctionDeclaration */) {
-                    write("function ");
-                    writeTextOfNode(currentText, node.name);
-                }
-                else if (node.kind === 148 /* Constructor */) {
-                    write("constructor");
-                }
-                else {
-                    writeTextOfNode(currentText, node.name);
-                    if (ts.hasQuestionToken(node)) {
-                        write("?");
-                    }
-                }
-                emitSignatureDeclaration(node);
-            }
-        }
-        function emitSignatureDeclarationWithJsDocComments(node) {
-            emitJsDocComments(node);
-            emitSignatureDeclaration(node);
-        }
-        function emitSignatureDeclaration(node) {
-            var prevEnclosingDeclaration = enclosingDeclaration;
-            enclosingDeclaration = node;
-            var closeParenthesizedFunctionType = false;
-            if (node.kind === 153 /* IndexSignature */) {
-                // Index signature can have readonly modifier
-                emitClassMemberDeclarationFlags(node.flags);
-                write("[");
-            }
-            else {
-                // Construct signature or constructor type write new Signature
-                if (node.kind === 152 /* ConstructSignature */ || node.kind === 157 /* ConstructorType */) {
-                    write("new ");
-                }
-                else if (node.kind === 156 /* FunctionType */) {
-                    var currentOutput = writer.getText();
-                    // Do not generate incorrect type when function type with type parameters is type argument
-                    // This could happen if user used space between two '<' making it error free
-                    // e.g var x: A< <Tany>(a: Tany)=>Tany>;
-                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
-                        closeParenthesizedFunctionType = true;
-                        write("(");
-                    }
-                }
-                emitTypeParameters(node.typeParameters);
-                write("(");
-            }
-            // Parameters
-            emitCommaList(node.parameters, emitParameterDeclaration);
-            if (node.kind === 153 /* IndexSignature */) {
-                write("]");
-            }
-            else {
-                write(")");
-            }
-            // If this is not a constructor and is not private, emit the return type
-            var isFunctionTypeOrConstructorType = node.kind === 156 /* FunctionType */ || node.kind === 157 /* ConstructorType */;
-            if (isFunctionTypeOrConstructorType || node.parent.kind === 159 /* TypeLiteral */) {
-                // Emit type literal signature return type only if specified
-                if (node.type) {
-                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
-                    emitType(node.type);
-                }
-            }
-            else if (node.kind !== 148 /* Constructor */ && !(node.flags & 8 /* Private */)) {
-                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
-            }
-            enclosingDeclaration = prevEnclosingDeclaration;
-            if (!isFunctionTypeOrConstructorType) {
-                write(";");
-                writeLine();
-            }
-            else if (closeParenthesizedFunctionType) {
-                write(")");
-            }
-            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage;
-                switch (node.kind) {
-                    case 152 /* ConstructSignature */:
-                        // Interfaces cannot have return types that cannot be named
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 151 /* CallSignature */:
-                        // Interfaces cannot have return types that cannot be named
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 153 /* IndexSignature */:
-                        // Interfaces cannot have return types that cannot be named
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
-                        break;
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (node.flags & 32 /* Static */) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
-                        }
-                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
-                        }
-                        else {
-                            // Interfaces cannot have return types that cannot be named
-                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
-                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
-                        }
-                        break;
-                    case 220 /* FunctionDeclaration */:
-                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
-                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
-                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
-                        break;
-                    default:
-                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
-                }
-                return {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node.name || node
-                };
-            }
-        }
-        function emitParameterDeclaration(node) {
-            increaseIndent();
-            emitJsDocComments(node);
-            if (node.dotDotDotToken) {
-                write("...");
-            }
-            if (ts.isBindingPattern(node.name)) {
-                // For bindingPattern, we can't simply writeTextOfNode from the source file
-                // because we want to omit the initializer and using writeTextOfNode will result in initializer get emitted.
-                // Therefore, we will have to recursively emit each element in the bindingPattern.
-                emitBindingPattern(node.name);
-            }
-            else {
-                writeTextOfNode(currentText, node.name);
-            }
-            if (resolver.isOptionalParameter(node)) {
-                write("?");
-            }
-            decreaseIndent();
-            if (node.parent.kind === 156 /* FunctionType */ ||
-                node.parent.kind === 157 /* ConstructorType */ ||
-                node.parent.parent.kind === 159 /* TypeLiteral */) {
-                emitTypeOfVariableDeclarationFromTypeLiteral(node);
-            }
-            else if (!(node.parent.flags & 8 /* Private */)) {
-                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
-            }
-            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
-                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
-                return diagnosticMessage !== undefined ? {
-                    diagnosticMessage: diagnosticMessage,
-                    errorNode: node,
-                    typeName: node.name
-                } : undefined;
-            }
-            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
-                switch (node.parent.kind) {
-                    case 148 /* Constructor */:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
-                    case 152 /* ConstructSignature */:
-                        // Interfaces cannot have parameter types that cannot be named
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 151 /* CallSignature */:
-                        // Interfaces cannot have parameter types that cannot be named
-                        return symbolAccessibilityResult.errorModuleName ?
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (node.parent.flags & 32 /* Static */) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
-                            return symbolAccessibilityResult.errorModuleName ?
-                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
-                        }
-                        else {
-                            // Interfaces cannot have parameter types that cannot be named
-                            return symbolAccessibilityResult.errorModuleName ?
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
-                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
-                        }
-                    case 220 /* FunctionDeclaration */:
-                        return symbolAccessibilityResult.errorModuleName ?
-                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
-                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
-                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
-                    default:
-                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
-                }
-            }
-            function emitBindingPattern(bindingPattern) {
-                // We have to explicitly emit square bracket and bracket because these tokens are not store inside the node.
-                if (bindingPattern.kind === 167 /* ObjectBindingPattern */) {
-                    write("{");
-                    emitCommaList(bindingPattern.elements, emitBindingElement);
-                    write("}");
-                }
-                else if (bindingPattern.kind === 168 /* ArrayBindingPattern */) {
-                    write("[");
-                    var elements = bindingPattern.elements;
-                    emitCommaList(elements, emitBindingElement);
-                    if (elements && elements.hasTrailingComma) {
-                        write(", ");
-                    }
-                    write("]");
-                }
-            }
-            function emitBindingElement(bindingElement) {
-                if (bindingElement.kind === 193 /* OmittedExpression */) {
-                    // If bindingElement is an omittedExpression (i.e. containing elision),
-                    // we will emit blank space (although this may differ from users' original code,
-                    // it allows emitSeparatedList to write separator appropriately)
-                    // Example:
-                    //      original: function foo([, x, ,]) {}
-                    //      emit    : function foo([ , x,  , ]) {}
-                    write(" ");
-                }
-                else if (bindingElement.kind === 169 /* BindingElement */) {
-                    if (bindingElement.propertyName) {
-                        // bindingElement has propertyName property in the following case:
-                        //      { y: [a,b,c] ...} -> bindingPattern will have a property called propertyName for "y"
-                        // We have to explicitly emit the propertyName before descending into its binding elements.
-                        // Example:
-                        //      original: function foo({y: [a,b,c]}) {}
-                        //      emit    : declare function foo({y: [a, b, c]}: { y: [any, any, any] }) void;
-                        writeTextOfNode(currentText, bindingElement.propertyName);
-                        write(": ");
-                    }
-                    if (bindingElement.name) {
-                        if (ts.isBindingPattern(bindingElement.name)) {
-                            // If it is a nested binding pattern, we will recursively descend into each element and emit each one separately.
-                            // In the case of rest element, we will omit rest element.
-                            // Example:
-                            //      original: function foo([a, [[b]], c] = [1,[["string"]], 3]) {}
-                            //      emit    : declare function foo([a, [[b]], c]: [number, [[string]], number]): void;
-                            //      original with rest: function foo([a, ...c]) {}
-                            //      emit              : declare function foo([a, ...c]): void;
-                            emitBindingPattern(bindingElement.name);
-                        }
-                        else {
-                            ts.Debug.assert(bindingElement.name.kind === 69 /* Identifier */);
-                            // If the node is just an identifier, we will simply emit the text associated with the node's name
-                            // Example:
-                            //      original: function foo({y = 10, x}) {}
-                            //      emit    : declare function foo({y, x}: {number, any}): void;
-                            if (bindingElement.dotDotDotToken) {
-                                write("...");
-                            }
-                            writeTextOfNode(currentText, bindingElement.name);
-                        }
-                    }
-                }
-            }
-        }
-        function emitNode(node) {
-            switch (node.kind) {
-                case 220 /* FunctionDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                case 229 /* ImportEqualsDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 221 /* ClassDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 224 /* EnumDeclaration */:
-                    return emitModuleElement(node, isModuleElementVisible(node));
-                case 200 /* VariableStatement */:
-                    return emitModuleElement(node, isVariableStatementVisible(node));
-                case 230 /* ImportDeclaration */:
-                    // Import declaration without import clause is visible, otherwise it is not visible
-                    return emitModuleElement(node, /*isModuleElementVisible*/ !node.importClause);
-                case 236 /* ExportDeclaration */:
-                    return emitExportDeclaration(node);
-                case 148 /* Constructor */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                    return writeFunctionDeclaration(node);
-                case 152 /* ConstructSignature */:
-                case 151 /* CallSignature */:
-                case 153 /* IndexSignature */:
-                    return emitSignatureDeclarationWithJsDocComments(node);
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                    return emitAccessorDeclaration(node);
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                    return emitPropertyDeclaration(node);
-                case 255 /* EnumMember */:
-                    return emitEnumMemberDeclaration(node);
-                case 235 /* ExportAssignment */:
-                    return emitExportAssignment(node);
-                case 256 /* SourceFile */:
-                    return emitSourceFile(node);
-            }
-        }
-        /**
-         * Adds the reference to referenced file, returns true if global file reference was emitted
-         * @param referencedFile
-         * @param addBundledFileReference Determines if global file reference corresponding to bundled file should be emitted or not
-         */
-        function writeReferencePath(referencedFile, addBundledFileReference) {
-            var declFileName;
-            var addedBundledEmitReference = false;
-            if (ts.isDeclarationFile(referencedFile)) {
-                // Declaration file, use declaration file name
-                declFileName = referencedFile.fileName;
-            }
-            else {
-                // Get the declaration file path
-                ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile);
-            }
-            if (declFileName) {
-                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
-                /*isAbsolutePathAnUrl*/ false);
-                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
-            }
-            return addedBundledEmitReference;
-            function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) {
-                // Dont add reference path to this file if it is a bundled emit and caller asked not emit bundled file path
-                if (isBundledEmit && !addBundledFileReference) {
-                    return;
-                }
-                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
-                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
-                addedBundledEmitReference = isBundledEmit;
-            }
-        }
-    }
-    /* @internal */
-    function writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) {
-        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit);
-        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
-        if (!emitSkipped) {
-            var declarationOutput = emitDeclarationResult.referencesOutput
-                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
-            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
-        }
-        return emitSkipped;
-        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
-            var appliedSyncOutputPos = 0;
-            var declarationOutput = "";
-            // apply asynchronous additions to the synchronous output
-            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
-                if (aliasEmitInfo.asynchronousOutput) {
-                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
-                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
-                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
-                }
-            });
-            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
-            return declarationOutput;
-        }
-    }
-    ts.writeDeclarationFile = writeDeclarationFile;
-})(ts || (ts = {}));
-/// <reference path="checker.ts"/>
-/// <reference path="sourcemap.ts" />
-/// <reference path="declarationEmitter.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    function getResolvedExternalModuleName(host, file) {
-        return file.moduleName || ts.getExternalModuleNameFromPath(host, file.fileName);
-    }
-    ts.getResolvedExternalModuleName = getResolvedExternalModuleName;
-    function getExternalModuleNameFromDeclaration(host, resolver, declaration) {
-        var file = resolver.getExternalModuleFileFromDeclaration(declaration);
-        if (!file || ts.isDeclarationFile(file)) {
-            return undefined;
-        }
-        return getResolvedExternalModuleName(host, file);
-    }
-    ts.getExternalModuleNameFromDeclaration = getExternalModuleNameFromDeclaration;
-    var Jump;
-    (function (Jump) {
-        Jump[Jump["Break"] = 2] = "Break";
-        Jump[Jump["Continue"] = 4] = "Continue";
-        Jump[Jump["Return"] = 8] = "Return";
-    })(Jump || (Jump = {}));
-    var entities = {
-        "quot": 0x0022,
-        "amp": 0x0026,
-        "apos": 0x0027,
-        "lt": 0x003C,
-        "gt": 0x003E,
-        "nbsp": 0x00A0,
-        "iexcl": 0x00A1,
-        "cent": 0x00A2,
-        "pound": 0x00A3,
-        "curren": 0x00A4,
-        "yen": 0x00A5,
-        "brvbar": 0x00A6,
-        "sect": 0x00A7,
-        "uml": 0x00A8,
-        "copy": 0x00A9,
-        "ordf": 0x00AA,
-        "laquo": 0x00AB,
-        "not": 0x00AC,
-        "shy": 0x00AD,
-        "reg": 0x00AE,
-        "macr": 0x00AF,
-        "deg": 0x00B0,
-        "plusmn": 0x00B1,
-        "sup2": 0x00B2,
-        "sup3": 0x00B3,
-        "acute": 0x00B4,
-        "micro": 0x00B5,
-        "para": 0x00B6,
-        "middot": 0x00B7,
-        "cedil": 0x00B8,
-        "sup1": 0x00B9,
-        "ordm": 0x00BA,
-        "raquo": 0x00BB,
-        "frac14": 0x00BC,
-        "frac12": 0x00BD,
-        "frac34": 0x00BE,
-        "iquest": 0x00BF,
-        "Agrave": 0x00C0,
-        "Aacute": 0x00C1,
-        "Acirc": 0x00C2,
-        "Atilde": 0x00C3,
-        "Auml": 0x00C4,
-        "Aring": 0x00C5,
-        "AElig": 0x00C6,
-        "Ccedil": 0x00C7,
-        "Egrave": 0x00C8,
-        "Eacute": 0x00C9,
-        "Ecirc": 0x00CA,
-        "Euml": 0x00CB,
-        "Igrave": 0x00CC,
-        "Iacute": 0x00CD,
-        "Icirc": 0x00CE,
-        "Iuml": 0x00CF,
-        "ETH": 0x00D0,
-        "Ntilde": 0x00D1,
-        "Ograve": 0x00D2,
-        "Oacute": 0x00D3,
-        "Ocirc": 0x00D4,
-        "Otilde": 0x00D5,
-        "Ouml": 0x00D6,
-        "times": 0x00D7,
-        "Oslash": 0x00D8,
-        "Ugrave": 0x00D9,
-        "Uacute": 0x00DA,
-        "Ucirc": 0x00DB,
-        "Uuml": 0x00DC,
-        "Yacute": 0x00DD,
-        "THORN": 0x00DE,
-        "szlig": 0x00DF,
-        "agrave": 0x00E0,
-        "aacute": 0x00E1,
-        "acirc": 0x00E2,
-        "atilde": 0x00E3,
-        "auml": 0x00E4,
-        "aring": 0x00E5,
-        "aelig": 0x00E6,
-        "ccedil": 0x00E7,
-        "egrave": 0x00E8,
-        "eacute": 0x00E9,
-        "ecirc": 0x00EA,
-        "euml": 0x00EB,
-        "igrave": 0x00EC,
-        "iacute": 0x00ED,
-        "icirc": 0x00EE,
-        "iuml": 0x00EF,
-        "eth": 0x00F0,
-        "ntilde": 0x00F1,
-        "ograve": 0x00F2,
-        "oacute": 0x00F3,
-        "ocirc": 0x00F4,
-        "otilde": 0x00F5,
-        "ouml": 0x00F6,
-        "divide": 0x00F7,
-        "oslash": 0x00F8,
-        "ugrave": 0x00F9,
-        "uacute": 0x00FA,
-        "ucirc": 0x00FB,
-        "uuml": 0x00FC,
-        "yacute": 0x00FD,
-        "thorn": 0x00FE,
-        "yuml": 0x00FF,
-        "OElig": 0x0152,
-        "oelig": 0x0153,
-        "Scaron": 0x0160,
-        "scaron": 0x0161,
-        "Yuml": 0x0178,
-        "fnof": 0x0192,
-        "circ": 0x02C6,
-        "tilde": 0x02DC,
-        "Alpha": 0x0391,
-        "Beta": 0x0392,
-        "Gamma": 0x0393,
-        "Delta": 0x0394,
-        "Epsilon": 0x0395,
-        "Zeta": 0x0396,
-        "Eta": 0x0397,
-        "Theta": 0x0398,
-        "Iota": 0x0399,
-        "Kappa": 0x039A,
-        "Lambda": 0x039B,
-        "Mu": 0x039C,
-        "Nu": 0x039D,
-        "Xi": 0x039E,
-        "Omicron": 0x039F,
-        "Pi": 0x03A0,
-        "Rho": 0x03A1,
-        "Sigma": 0x03A3,
-        "Tau": 0x03A4,
-        "Upsilon": 0x03A5,
-        "Phi": 0x03A6,
-        "Chi": 0x03A7,
-        "Psi": 0x03A8,
-        "Omega": 0x03A9,
-        "alpha": 0x03B1,
-        "beta": 0x03B2,
-        "gamma": 0x03B3,
-        "delta": 0x03B4,
-        "epsilon": 0x03B5,
-        "zeta": 0x03B6,
-        "eta": 0x03B7,
-        "theta": 0x03B8,
-        "iota": 0x03B9,
-        "kappa": 0x03BA,
-        "lambda": 0x03BB,
-        "mu": 0x03BC,
-        "nu": 0x03BD,
-        "xi": 0x03BE,
-        "omicron": 0x03BF,
-        "pi": 0x03C0,
-        "rho": 0x03C1,
-        "sigmaf": 0x03C2,
-        "sigma": 0x03C3,
-        "tau": 0x03C4,
-        "upsilon": 0x03C5,
-        "phi": 0x03C6,
-        "chi": 0x03C7,
-        "psi": 0x03C8,
-        "omega": 0x03C9,
-        "thetasym": 0x03D1,
-        "upsih": 0x03D2,
-        "piv": 0x03D6,
-        "ensp": 0x2002,
-        "emsp": 0x2003,
-        "thinsp": 0x2009,
-        "zwnj": 0x200C,
-        "zwj": 0x200D,
-        "lrm": 0x200E,
-        "rlm": 0x200F,
-        "ndash": 0x2013,
-        "mdash": 0x2014,
-        "lsquo": 0x2018,
-        "rsquo": 0x2019,
-        "sbquo": 0x201A,
-        "ldquo": 0x201C,
-        "rdquo": 0x201D,
-        "bdquo": 0x201E,
-        "dagger": 0x2020,
-        "Dagger": 0x2021,
-        "bull": 0x2022,
-        "hellip": 0x2026,
-        "permil": 0x2030,
-        "prime": 0x2032,
-        "Prime": 0x2033,
-        "lsaquo": 0x2039,
-        "rsaquo": 0x203A,
-        "oline": 0x203E,
-        "frasl": 0x2044,
-        "euro": 0x20AC,
-        "image": 0x2111,
-        "weierp": 0x2118,
-        "real": 0x211C,
-        "trade": 0x2122,
-        "alefsym": 0x2135,
-        "larr": 0x2190,
-        "uarr": 0x2191,
-        "rarr": 0x2192,
-        "darr": 0x2193,
-        "harr": 0x2194,
-        "crarr": 0x21B5,
-        "lArr": 0x21D0,
-        "uArr": 0x21D1,
-        "rArr": 0x21D2,
-        "dArr": 0x21D3,
-        "hArr": 0x21D4,
-        "forall": 0x2200,
-        "part": 0x2202,
-        "exist": 0x2203,
-        "empty": 0x2205,
-        "nabla": 0x2207,
-        "isin": 0x2208,
-        "notin": 0x2209,
-        "ni": 0x220B,
-        "prod": 0x220F,
-        "sum": 0x2211,
-        "minus": 0x2212,
-        "lowast": 0x2217,
-        "radic": 0x221A,
-        "prop": 0x221D,
-        "infin": 0x221E,
-        "ang": 0x2220,
-        "and": 0x2227,
-        "or": 0x2228,
-        "cap": 0x2229,
-        "cup": 0x222A,
-        "int": 0x222B,
-        "there4": 0x2234,
-        "sim": 0x223C,
-        "cong": 0x2245,
-        "asymp": 0x2248,
-        "ne": 0x2260,
-        "equiv": 0x2261,
-        "le": 0x2264,
-        "ge": 0x2265,
-        "sub": 0x2282,
-        "sup": 0x2283,
-        "nsub": 0x2284,
-        "sube": 0x2286,
-        "supe": 0x2287,
-        "oplus": 0x2295,
-        "otimes": 0x2297,
-        "perp": 0x22A5,
-        "sdot": 0x22C5,
-        "lceil": 0x2308,
-        "rceil": 0x2309,
-        "lfloor": 0x230A,
-        "rfloor": 0x230B,
-        "lang": 0x2329,
-        "rang": 0x232A,
-        "loz": 0x25CA,
-        "spades": 0x2660,
-        "clubs": 0x2663,
-        "hearts": 0x2665,
-        "diams": 0x2666
-    };
-    // Flags enum to track count of temp variables and a few dedicated names
-    var TempFlags;
-    (function (TempFlags) {
-        TempFlags[TempFlags["Auto"] = 0] = "Auto";
-        TempFlags[TempFlags["CountMask"] = 268435455] = "CountMask";
-        TempFlags[TempFlags["_i"] = 268435456] = "_i";
-    })(TempFlags || (TempFlags = {}));
-    var CopyDirection;
-    (function (CopyDirection) {
-        CopyDirection[CopyDirection["ToOriginal"] = 0] = "ToOriginal";
-        CopyDirection[CopyDirection["ToOutParameter"] = 1] = "ToOutParameter";
-    })(CopyDirection || (CopyDirection = {}));
-    // targetSourceFile is when users only want one file in entire project to be emitted. This is used in compileOnSave feature
-    function emitFiles(resolver, host, targetSourceFile) {
-        // emit output for the __extends helper function
-        var extendsHelper = "\nvar __extends = (this && this.__extends) || function (d, b) {\n    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n    function __() { this.constructor = d; }\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n};";
-        var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n    for (var s, i = 1, n = arguments.length; i < n; i++) {\n        s = arguments[i];\n        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n            t[p] = s[p];\n    }\n    return t;\n};";
-        // emit output for the __decorate helper function
-        var decorateHelper = "\nvar __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\n};";
-        // emit output for the __metadata helper function
-        var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};";
-        // emit output for the __param helper function
-        var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n    return function (target, key) { decorator(target, key, paramIndex); }\n};";
-        var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n    return new (P || (P = Promise))(function (resolve, reject) {\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n        step((generator = generator.apply(thisArg, _arguments)).next());\n    });\n};";
-        var compilerOptions = host.getCompilerOptions();
-        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
-        var modulekind = ts.getEmitModuleKind(compilerOptions);
-        var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
-        var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined;
-        var emitterDiagnostics = ts.createDiagnosticCollection();
-        var emitSkipped = false;
-        var newLine = host.getNewLine();
-        var emitJavaScript = createFileEmitter();
-        ts.forEachExpectedEmitFile(host, emitFile, targetSourceFile);
-        return {
-            emitSkipped: emitSkipped,
-            diagnostics: emitterDiagnostics.getDiagnostics(),
-            emittedFiles: emittedFilesList,
-            sourceMaps: sourceMapDataList
-        };
-        function isUniqueLocalName(name, container) {
-            for (var node = container; ts.isNodeDescendentOf(node, container); node = node.nextContainer) {
-                if (node.locals && ts.hasProperty(node.locals, name)) {
-                    // We conservatively include alias symbols to cover cases where they're emitted as locals
-                    if (node.locals[name].flags & (107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */)) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        function setLabeledJump(state, isBreak, labelText, labelMarker) {
-            if (isBreak) {
-                if (!state.labeledNonLocalBreaks) {
-                    state.labeledNonLocalBreaks = {};
-                }
-                state.labeledNonLocalBreaks[labelText] = labelMarker;
-            }
-            else {
-                if (!state.labeledNonLocalContinues) {
-                    state.labeledNonLocalContinues = {};
-                }
-                state.labeledNonLocalContinues[labelText] = labelMarker;
-            }
-        }
-        function hoistVariableDeclarationFromLoop(state, declaration) {
-            if (!state.hoistedLocalVariables) {
-                state.hoistedLocalVariables = [];
-            }
-            visit(declaration.name);
-            function visit(node) {
-                if (node.kind === 69 /* Identifier */) {
-                    state.hoistedLocalVariables.push(node);
-                }
-                else {
-                    for (var _a = 0, _b = node.elements; _a < _b.length; _a++) {
-                        var element = _b[_a];
-                        visit(element.name);
-                    }
-                }
-            }
-        }
-        function createFileEmitter() {
-            var writer = ts.createTextWriter(newLine);
-            var write = writer.write, writeTextOfNode = writer.writeTextOfNode, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent;
-            var sourceMap = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? ts.createSourceMapWriter(host, writer) : ts.getNullSourceMapWriter();
-            var setSourceFile = sourceMap.setSourceFile, emitStart = sourceMap.emitStart, emitEnd = sourceMap.emitEnd, emitPos = sourceMap.emitPos;
-            var currentSourceFile;
-            var currentText;
-            var currentLineMap;
-            var currentFileIdentifiers;
-            var renamedDependencies;
-            var isEs6Module;
-            var isCurrentFileExternalModule;
-            // name of an exporter function if file is a System external module
-            // System.register([...], function (<exporter>) {...})
-            // exporting in System modules looks like:
-            // export var x; ... x = 1
-            // =>
-            // var x;... exporter("x", x = 1)
-            var exportFunctionForFile;
-            var contextObjectForFile;
-            var generatedNameSet;
-            var nodeToGeneratedName;
-            var computedPropertyNamesToGeneratedNames;
-            var decoratedClassAliases;
-            var convertedLoopState;
-            var extendsEmitted;
-            var assignEmitted;
-            var decorateEmitted;
-            var paramEmitted;
-            var awaiterEmitted;
-            var tempFlags = 0;
-            var tempVariables;
-            var tempParameters;
-            var externalImports;
-            var exportSpecifiers;
-            var exportEquals;
-            var hasExportStarsToExportValues;
-            var detachedCommentsInfo;
-            /** Sourcemap data that will get encoded */
-            var sourceMapData;
-            /** Is the file being emitted into its own file */
-            var isOwnFileEmit;
-            /** If removeComments is true, no leading-comments needed to be emitted **/
-            var emitLeadingCommentsOfPosition = compilerOptions.removeComments ? function (pos) { } : emitLeadingCommentsOfPositionWorker;
-            var setSourceMapWriterEmit = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? changeSourceMapEmit : function (writer) { };
-            var moduleEmitDelegates = (_a = {},
-                _a[ts.ModuleKind.ES6] = emitES6Module,
-                _a[ts.ModuleKind.AMD] = emitAMDModule,
-                _a[ts.ModuleKind.System] = emitSystemModule,
-                _a[ts.ModuleKind.UMD] = emitUMDModule,
-                _a[ts.ModuleKind.CommonJS] = emitCommonJSModule,
-                _a
-            );
-            var bundleEmitDelegates = (_b = {},
-                _b[ts.ModuleKind.ES6] = function () { },
-                _b[ts.ModuleKind.AMD] = emitAMDModule,
-                _b[ts.ModuleKind.System] = emitSystemModule,
-                _b[ts.ModuleKind.UMD] = function () { },
-                _b[ts.ModuleKind.CommonJS] = function () { },
-                _b
-            );
-            return doEmit;
-            function doEmit(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
-                sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
-                generatedNameSet = {};
-                nodeToGeneratedName = [];
-                decoratedClassAliases = [];
-                isOwnFileEmit = !isBundledEmit;
-                // Emit helpers from all the files
-                if (isBundledEmit && modulekind) {
-                    ts.forEach(sourceFiles, emitEmitHelpers);
-                }
-                // Do not call emit directly. It does not set the currentSourceFile.
-                ts.forEach(sourceFiles, emitSourceFile);
-                writeLine();
-                var sourceMappingURL = sourceMap.getSourceMappingURL();
-                if (sourceMappingURL) {
-                    write("//# sourceMappingURL=" + sourceMappingURL);
-                }
-                writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, /*writeByteOrderMark*/ compilerOptions.emitBOM, sourceFiles);
-                // reset the state
-                sourceMap.reset();
-                writer.reset();
-                currentSourceFile = undefined;
-                currentText = undefined;
-                currentLineMap = undefined;
-                exportFunctionForFile = undefined;
-                contextObjectForFile = undefined;
-                generatedNameSet = undefined;
-                nodeToGeneratedName = undefined;
-                decoratedClassAliases = undefined;
-                computedPropertyNamesToGeneratedNames = undefined;
-                convertedLoopState = undefined;
-                extendsEmitted = false;
-                decorateEmitted = false;
-                paramEmitted = false;
-                awaiterEmitted = false;
-                assignEmitted = false;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = undefined;
-                detachedCommentsInfo = undefined;
-                sourceMapData = undefined;
-                isEs6Module = false;
-                renamedDependencies = undefined;
-                isCurrentFileExternalModule = false;
-            }
-            function emitSourceFile(sourceFile) {
-                currentSourceFile = sourceFile;
-                currentText = sourceFile.text;
-                currentLineMap = ts.getLineStarts(sourceFile);
-                exportFunctionForFile = undefined;
-                contextObjectForFile = undefined;
-                isEs6Module = sourceFile.symbol && sourceFile.symbol.exports && !!sourceFile.symbol.exports["___esModule"];
-                renamedDependencies = sourceFile.renamedDependencies;
-                currentFileIdentifiers = sourceFile.identifiers;
-                isCurrentFileExternalModule = ts.isExternalModule(sourceFile);
-                setSourceFile(sourceFile);
-                emitNodeWithCommentsAndWithoutSourcemap(sourceFile);
-            }
-            function isUniqueName(name) {
-                return !resolver.hasGlobalName(name) &&
-                    !ts.hasProperty(currentFileIdentifiers, name) &&
-                    !ts.hasProperty(generatedNameSet, name);
-            }
-            // Return the next available name in the pattern _a ... _z, _0, _1, ...
-            // TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
-            // Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
-            function makeTempVariableName(flags) {
-                if (flags && !(tempFlags & flags)) {
-                    var name_23 = flags === 268435456 /* _i */ ? "_i" : "_n";
-                    if (isUniqueName(name_23)) {
-                        tempFlags |= flags;
-                        return name_23;
-                    }
-                }
-                while (true) {
-                    var count = tempFlags & 268435455 /* CountMask */;
-                    tempFlags++;
-                    // Skip over 'i' and 'n'
-                    if (count !== 8 && count !== 13) {
-                        var name_24 = count < 26 ? "_" + String.fromCharCode(97 /* a */ + count) : "_" + (count - 26);
-                        if (isUniqueName(name_24)) {
-                            return name_24;
-                        }
-                    }
-                }
-            }
-            // Generate a name that is unique within the current file and doesn't conflict with any names
-            // in global scope. The name is formed by adding an '_n' suffix to the specified base name,
-            // where n is a positive integer. Note that names generated by makeTempVariableName and
-            // makeUniqueName are guaranteed to never conflict.
-            function makeUniqueName(baseName) {
-                // Find the first unique 'name_n', where n is a positive number
-                if (baseName.charCodeAt(baseName.length - 1) !== 95 /* _ */) {
-                    baseName += "_";
-                }
-                var i = 1;
-                while (true) {
-                    var generatedName = baseName + i;
-                    if (isUniqueName(generatedName)) {
-                        return generatedNameSet[generatedName] = generatedName;
-                    }
-                    i++;
-                }
-            }
-            function generateNameForModuleOrEnum(node) {
-                var name = node.name.text;
-                // Use module/enum name itself if it is unique, otherwise make a unique variation
-                return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
-            }
-            function generateNameForImportOrExportDeclaration(node) {
-                var expr = ts.getExternalModuleName(node);
-                var baseName = expr.kind === 9 /* StringLiteral */ ?
-                    ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module";
-                return makeUniqueName(baseName);
-            }
-            function generateNameForExportDefault() {
-                return makeUniqueName("default");
-            }
-            function generateNameForClassExpression() {
-                return makeUniqueName("class");
-            }
-            function generateNameForNode(node) {
-                switch (node.kind) {
-                    case 69 /* Identifier */:
-                        return makeUniqueName(node.text);
-                    case 225 /* ModuleDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                        return generateNameForModuleOrEnum(node);
-                    case 230 /* ImportDeclaration */:
-                    case 236 /* ExportDeclaration */:
-                        return generateNameForImportOrExportDeclaration(node);
-                    case 220 /* FunctionDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 235 /* ExportAssignment */:
-                        return generateNameForExportDefault();
-                    case 192 /* ClassExpression */:
-                        return generateNameForClassExpression();
-                }
-            }
-            function getGeneratedNameForNode(node) {
-                var id = ts.getNodeId(node);
-                return nodeToGeneratedName[id] || (nodeToGeneratedName[id] = ts.unescapeIdentifier(generateNameForNode(node)));
-            }
-            /** Write emitted output to disk */
-            function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) {
-                if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
-                    ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false, sourceFiles);
-                }
-                if (sourceMapDataList) {
-                    sourceMapDataList.push(sourceMap.getSourceMapData());
-                }
-                ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles);
-            }
-            // Create a temporary variable with a unique unused name.
-            function createTempVariable(flags) {
-                var result = ts.createSynthesizedNode(69 /* Identifier */);
-                result.text = makeTempVariableName(flags);
-                return result;
-            }
-            function recordTempDeclaration(name) {
-                if (!tempVariables) {
-                    tempVariables = [];
-                }
-                tempVariables.push(name);
-            }
-            function createAndRecordTempVariable(flags) {
-                var temp = createTempVariable(flags);
-                recordTempDeclaration(temp);
-                return temp;
-            }
-            function emitTempDeclarations(newLine) {
-                if (tempVariables) {
-                    if (newLine) {
-                        writeLine();
-                    }
-                    else {
-                        write(" ");
-                    }
-                    write("var ");
-                    emitCommaList(tempVariables);
-                    write(";");
-                }
-            }
-            /** Emit the text for the given token that comes after startPos
-              * This by default writes the text provided with the given tokenKind
-              * but if optional emitFn callback is provided the text is emitted using the callback instead of default text
-              * @param tokenKind the kind of the token to search and emit
-              * @param startPos the position in the source to start searching for the token
-              * @param emitFn if given will be invoked to emit the text instead of actual token emit */
-            function emitToken(tokenKind, startPos, emitFn) {
-                var tokenStartPos = ts.skipTrivia(currentText, startPos);
-                emitPos(tokenStartPos);
-                var tokenString = ts.tokenToString(tokenKind);
-                if (emitFn) {
-                    emitFn();
-                }
-                else {
-                    write(tokenString);
-                }
-                var tokenEndPos = tokenStartPos + tokenString.length;
-                emitPos(tokenEndPos);
-                return tokenEndPos;
-            }
-            function emitOptional(prefix, node) {
-                if (node) {
-                    write(prefix);
-                    emit(node);
-                }
-            }
-            function emitParenthesizedIf(node, parenthesized) {
-                if (parenthesized) {
-                    write("(");
-                }
-                emit(node);
-                if (parenthesized) {
-                    write(")");
-                }
-            }
-            function emitLinePreservingList(parent, nodes, allowTrailingComma, spacesBetweenBraces) {
-                ts.Debug.assert(nodes.length > 0);
-                increaseIndent();
-                if (nodeStartPositionsAreOnSameLine(parent, nodes[0])) {
-                    if (spacesBetweenBraces) {
-                        write(" ");
-                    }
-                }
-                else {
-                    writeLine();
-                }
-                for (var i = 0, n = nodes.length; i < n; i++) {
-                    if (i) {
-                        if (nodeEndIsOnSameLineAsNodeStart(nodes[i - 1], nodes[i])) {
-                            write(", ");
-                        }
-                        else {
-                            write(",");
-                            writeLine();
-                        }
-                    }
-                    emit(nodes[i]);
-                }
-                if (nodes.hasTrailingComma && allowTrailingComma) {
-                    write(",");
-                }
-                decreaseIndent();
-                if (nodeEndPositionsAreOnSameLine(parent, ts.lastOrUndefined(nodes))) {
-                    if (spacesBetweenBraces) {
-                        write(" ");
-                    }
-                }
-                else {
-                    writeLine();
-                }
-            }
-            function emitList(nodes, start, count, multiLine, trailingComma, leadingComma, noTrailingNewLine, emitNode) {
-                if (!emitNode) {
-                    emitNode = emit;
-                }
-                for (var i = 0; i < count; i++) {
-                    if (multiLine) {
-                        if (i || leadingComma) {
-                            write(",");
-                        }
-                        writeLine();
-                    }
-                    else {
-                        if (i || leadingComma) {
-                            write(", ");
-                        }
-                    }
-                    var node = nodes[start + i];
-                    // This emitting is to make sure we emit following comment properly
-                    //   ...(x, /*comment1*/ y)...
-                    //         ^ => node.pos
-                    // "comment1" is not considered leading comment for "y" but rather
-                    // considered as trailing comment of the previous node.
-                    emitTrailingCommentsOfPosition(node.pos);
-                    emitNode(node);
-                    leadingComma = true;
-                }
-                if (trailingComma) {
-                    write(",");
-                }
-                if (multiLine && !noTrailingNewLine) {
-                    writeLine();
-                }
-                return count;
-            }
-            function emitCommaList(nodes) {
-                if (nodes) {
-                    emitList(nodes, 0, nodes.length, /*multiLine*/ false, /*trailingComma*/ false);
-                }
-            }
-            function emitLines(nodes) {
-                emitLinesStartingAt(nodes, /*startIndex*/ 0);
-            }
-            function emitLinesStartingAt(nodes, startIndex) {
-                for (var i = startIndex; i < nodes.length; i++) {
-                    writeLine();
-                    emit(nodes[i]);
-                }
-            }
-            function isBinaryOrOctalIntegerLiteral(node, text) {
-                if (node.kind === 8 /* NumericLiteral */ && text.length > 1) {
-                    switch (text.charCodeAt(1)) {
-                        case 98 /* b */:
-                        case 66 /* B */:
-                        case 111 /* o */:
-                        case 79 /* O */:
-                            return true;
-                    }
-                }
-                return false;
-            }
-            function emitLiteral(node) {
-                var text = getLiteralText(node);
-                if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap) && (node.kind === 9 /* StringLiteral */ || ts.isTemplateLiteralKind(node.kind))) {
-                    writer.writeLiteral(text);
-                }
-                else if (languageVersion < 2 /* ES6 */ && isBinaryOrOctalIntegerLiteral(node, text)) {
-                    write(node.text);
-                }
-                else {
-                    write(text);
-                }
-            }
-            function getLiteralText(node) {
-                // Any template literal or string literal with an extended escape
-                // (e.g. "\u{0067}") will need to be downleveled as a escaped string literal.
-                if (languageVersion < 2 /* ES6 */ && (ts.isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) {
-                    return getQuotedEscapedLiteralText('"', node.text, '"');
-                }
-                // If we don't need to downlevel and we can reach the original source text using
-                // the node's parent reference, then simply get the text as it was originally written.
-                if (node.parent) {
-                    return ts.getTextOfNodeFromSourceText(currentText, node);
-                }
-                // If we can't reach the original source text, use the canonical form if it's a number,
-                // or an escaped quoted form of the original text if it's string-like.
-                switch (node.kind) {
-                    case 9 /* StringLiteral */:
-                        return getQuotedEscapedLiteralText('"', node.text, '"');
-                    case 11 /* NoSubstitutionTemplateLiteral */:
-                        return getQuotedEscapedLiteralText("`", node.text, "`");
-                    case 12 /* TemplateHead */:
-                        return getQuotedEscapedLiteralText("`", node.text, "${");
-                    case 13 /* TemplateMiddle */:
-                        return getQuotedEscapedLiteralText("}", node.text, "${");
-                    case 14 /* TemplateTail */:
-                        return getQuotedEscapedLiteralText("}", node.text, "`");
-                    case 8 /* NumericLiteral */:
-                        return node.text;
-                }
-                ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
-            }
-            function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) {
-                return leftQuote + ts.escapeNonAsciiCharacters(ts.escapeString(text)) + rightQuote;
-            }
-            function emitDownlevelRawTemplateLiteral(node) {
-                // Find original source text, since we need to emit the raw strings of the tagged template.
-                // The raw strings contain the (escaped) strings of what the user wrote.
-                // Examples: `\n` is converted to "\\n", a template string with a newline to "\n".
-                var text = ts.getTextOfNodeFromSourceText(currentText, node);
-                // text contains the original source, it will also contain quotes ("`"), dollar signs and braces ("${" and "}"),
-                // thus we need to remove those characters.
-                // First template piece starts with "`", others with "}"
-                // Last template piece ends with "`", others with "${"
-                var isLast = node.kind === 11 /* NoSubstitutionTemplateLiteral */ || node.kind === 14 /* TemplateTail */;
-                text = text.substring(1, text.length - (isLast ? 1 : 2));
-                // Newline normalization:
-                // ES6 Spec 11.8.6.1 - Static Semantics of TV's and TRV's
-                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for both TV and TRV.
-                text = text.replace(/\r\n?/g, "\n");
-                text = ts.escapeString(text);
-                write("\"" + text + "\"");
-            }
-            function emitDownlevelTaggedTemplateArray(node, literalEmitter) {
-                write("[");
-                if (node.template.kind === 11 /* NoSubstitutionTemplateLiteral */) {
-                    literalEmitter(node.template);
-                }
-                else {
-                    literalEmitter(node.template.head);
-                    ts.forEach(node.template.templateSpans, function (child) {
-                        write(", ");
-                        literalEmitter(child.literal);
-                    });
-                }
-                write("]");
-            }
-            function emitDownlevelTaggedTemplate(node) {
-                var tempVariable = createAndRecordTempVariable(0 /* Auto */);
-                write("(");
-                emit(tempVariable);
-                write(" = ");
-                emitDownlevelTaggedTemplateArray(node, emit);
-                write(", ");
-                emit(tempVariable);
-                write(".raw = ");
-                emitDownlevelTaggedTemplateArray(node, emitDownlevelRawTemplateLiteral);
-                write(", ");
-                emitParenthesizedIf(node.tag, needsParenthesisForPropertyAccessOrInvocation(node.tag));
-                write("(");
-                emit(tempVariable);
-                // Now we emit the expressions
-                if (node.template.kind === 189 /* TemplateExpression */) {
-                    ts.forEach(node.template.templateSpans, function (templateSpan) {
-                        write(", ");
-                        var needsParens = templateSpan.expression.kind === 187 /* BinaryExpression */
-                            && templateSpan.expression.operatorToken.kind === 24 /* CommaToken */;
-                        emitParenthesizedIf(templateSpan.expression, needsParens);
-                    });
-                }
-                write("))");
-            }
-            function emitTemplateExpression(node) {
-                // In ES6 mode and above, we can simply emit each portion of a template in order, but in
-                // ES3 & ES5 we must convert the template expression into a series of string concatenations.
-                if (languageVersion >= 2 /* ES6 */) {
-                    ts.forEachChild(node, emit);
-                    return;
-                }
-                var emitOuterParens = ts.isExpression(node.parent)
-                    && templateNeedsParens(node, node.parent);
-                if (emitOuterParens) {
-                    write("(");
-                }
-                var headEmitted = false;
-                if (shouldEmitTemplateHead()) {
-                    emitLiteral(node.head);
-                    headEmitted = true;
-                }
-                for (var i = 0, n = node.templateSpans.length; i < n; i++) {
-                    var templateSpan = node.templateSpans[i];
-                    // Check if the expression has operands and binds its operands less closely than binary '+'.
-                    // If it does, we need to wrap the expression in parentheses. Otherwise, something like
-                    //    `abc${ 1 << 2 }`
-                    // becomes
-                    //    "abc" + 1 << 2 + ""
-                    // which is really
-                    //    ("abc" + 1) << (2 + "")
-                    // rather than
-                    //    "abc" + (1 << 2) + ""
-                    var needsParens = templateSpan.expression.kind !== 178 /* ParenthesizedExpression */
-                        && comparePrecedenceToBinaryPlus(templateSpan.expression) !== 1 /* GreaterThan */;
-                    if (i > 0 || headEmitted) {
-                        // If this is the first span and the head was not emitted, then this templateSpan's
-                        // expression will be the first to be emitted. Don't emit the preceding ' + ' in that
-                        // case.
-                        write(" + ");
-                    }
-                    emitParenthesizedIf(templateSpan.expression, needsParens);
-                    // Only emit if the literal is non-empty.
-                    // The binary '+' operator is left-associative, so the first string concatenation
-                    // with the head will force the result up to this point to be a string.
-                    // Emitting a '+ ""' has no semantic effect for middles and tails.
-                    if (templateSpan.literal.text.length !== 0) {
-                        write(" + ");
-                        emitLiteral(templateSpan.literal);
-                    }
-                }
-                if (emitOuterParens) {
-                    write(")");
-                }
-                function shouldEmitTemplateHead() {
-                    // If this expression has an empty head literal and the first template span has a non-empty
-                    // literal, then emitting the empty head literal is not necessary.
-                    //     `${ foo } and ${ bar }`
-                    // can be emitted as
-                    //     foo + " and " + bar
-                    // This is because it is only required that one of the first two operands in the emit
-                    // output must be a string literal, so that the other operand and all following operands
-                    // are forced into strings.
-                    //
-                    // If the first template span has an empty literal, then the head must still be emitted.
-                    //     `${ foo }${ bar }`
-                    // must still be emitted as
-                    //     "" + foo + bar
-                    // There is always atleast one templateSpan in this code path, since
-                    // NoSubstitutionTemplateLiterals are directly emitted via emitLiteral()
-                    ts.Debug.assert(node.templateSpans.length !== 0);
-                    return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0;
-                }
-                function templateNeedsParens(template, parent) {
-                    switch (parent.kind) {
-                        case 174 /* CallExpression */:
-                        case 175 /* NewExpression */:
-                            return parent.expression === template;
-                        case 176 /* TaggedTemplateExpression */:
-                        case 178 /* ParenthesizedExpression */:
-                            return false;
-                        default:
-                            return comparePrecedenceToBinaryPlus(parent) !== -1 /* LessThan */;
-                    }
-                }
-                /**
-                 * Returns whether the expression has lesser, greater,
-                 * or equal precedence to the binary '+' operator
-                 */
-                function comparePrecedenceToBinaryPlus(expression) {
-                    // All binary expressions have lower precedence than '+' apart from '*', '/', and '%'
-                    // which have greater precedence and '-' which has equal precedence.
-                    // All unary operators have a higher precedence apart from yield.
-                    // Arrow functions and conditionals have a lower precedence,
-                    // although we convert the former into regular function expressions in ES5 mode,
-                    // and in ES6 mode this function won't get called anyway.
-                    //
-                    // TODO (drosen): Note that we need to account for the upcoming 'yield' and
-                    //                spread ('...') unary operators that are anticipated for ES6.
-                    switch (expression.kind) {
-                        case 187 /* BinaryExpression */:
-                            switch (expression.operatorToken.kind) {
-                                case 37 /* AsteriskToken */:
-                                case 39 /* SlashToken */:
-                                case 40 /* PercentToken */:
-                                    return 1 /* GreaterThan */;
-                                case 35 /* PlusToken */:
-                                case 36 /* MinusToken */:
-                                    return 0 /* EqualTo */;
-                                default:
-                                    return -1 /* LessThan */;
-                            }
-                        case 190 /* YieldExpression */:
-                        case 188 /* ConditionalExpression */:
-                            return -1 /* LessThan */;
-                        default:
-                            return 1 /* GreaterThan */;
-                    }
-                }
-            }
-            function emitTemplateSpan(span) {
-                emit(span.expression);
-                emit(span.literal);
-            }
-            function jsxEmitReact(node) {
-                /// Emit a tag name, which is either '"div"' for lower-cased names, or
-                /// 'Div' for upper-cased or dotted names
-                function emitTagName(name) {
-                    if (name.kind === 69 /* Identifier */ && ts.isIntrinsicJsxName(name.text)) {
-                        write('"');
-                        emit(name);
-                        write('"');
-                    }
-                    else {
-                        emit(name);
-                    }
-                }
-                /// Emit an attribute name, which is quoted if it needs to be quoted. Because
-                /// these emit into an object literal property name, we don't need to be worried
-                /// about keywords, just non-identifier characters
-                function emitAttributeName(name) {
-                    if (/^[A-Za-z_]\w*$/.test(name.text)) {
-                        emit(name);
-                    }
-                    else {
-                        write('"');
-                        emit(name);
-                        write('"');
-                    }
-                }
-                /// Emit an name/value pair for an attribute (e.g. "x: 3")
-                function emitJsxAttribute(node) {
-                    emitAttributeName(node.name);
-                    write(": ");
-                    if (node.initializer) {
-                        emit(node.initializer);
-                    }
-                    else {
-                        write("true");
-                    }
-                }
-                function emitJsxElement(openingNode, children) {
-                    var syntheticReactRef = ts.createSynthesizedNode(69 /* Identifier */);
-                    syntheticReactRef.text = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
-                    syntheticReactRef.parent = openingNode;
-                    // Call React.createElement(tag, ...
-                    emitLeadingComments(openingNode);
-                    emitExpressionIdentifier(syntheticReactRef);
-                    write(".createElement(");
-                    emitTagName(openingNode.tagName);
-                    write(", ");
-                    // Attribute list
-                    if (openingNode.attributes.length === 0) {
-                        // When there are no attributes, React wants "null"
-                        write("null");
-                    }
-                    else {
-                        // Either emit one big object literal (no spread attribs), or
-                        // a call to the __assign helper
-                        var attrs = openingNode.attributes;
-                        if (ts.forEach(attrs, function (attr) { return attr.kind === 247 /* JsxSpreadAttribute */; })) {
-                            write("__assign(");
-                            var haveOpenedObjectLiteral = false;
-                            for (var i = 0; i < attrs.length; i++) {
-                                if (attrs[i].kind === 247 /* JsxSpreadAttribute */) {
-                                    // If this is the first argument, we need to emit a {} as the first argument
-                                    if (i === 0) {
-                                        write("{}, ");
-                                    }
-                                    if (haveOpenedObjectLiteral) {
-                                        write("}");
-                                        haveOpenedObjectLiteral = false;
-                                    }
-                                    if (i > 0) {
-                                        write(", ");
-                                    }
-                                    emit(attrs[i].expression);
-                                }
-                                else {
-                                    ts.Debug.assert(attrs[i].kind === 246 /* JsxAttribute */);
-                                    if (haveOpenedObjectLiteral) {
-                                        write(", ");
-                                    }
-                                    else {
-                                        haveOpenedObjectLiteral = true;
-                                        if (i > 0) {
-                                            write(", ");
-                                        }
-                                        write("{");
-                                    }
-                                    emitJsxAttribute(attrs[i]);
-                                }
-                            }
-                            if (haveOpenedObjectLiteral)
-                                write("}");
-                            write(")"); // closing paren to React.__spread(
-                        }
-                        else {
-                            // One object literal with all the attributes in them
-                            write("{");
-                            for (var i = 0, n = attrs.length; i < n; i++) {
-                                if (i > 0) {
-                                    write(", ");
-                                }
-                                emitJsxAttribute(attrs[i]);
-                            }
-                            write("}");
-                        }
-                    }
-                    // Children
-                    if (children) {
-                        var firstChild = void 0;
-                        var multipleEmittableChildren = false;
-                        for (var i = 0, n = children.length; i < n; i++) {
-                            var jsxChild = children[i];
-                            if (isJsxChildEmittable(jsxChild)) {
-                                // we need to decide whether to emit in single line or multiple lines as indented list
-                                // store firstChild reference, if we see another emittable child, then emit accordingly
-                                if (!firstChild) {
-                                    write(", ");
-                                    firstChild = jsxChild;
-                                }
-                                else {
-                                    // more than one emittable child, emit indented list
-                                    if (!multipleEmittableChildren) {
-                                        multipleEmittableChildren = true;
-                                        increaseIndent();
-                                        writeLine();
-                                        emit(firstChild);
-                                    }
-                                    write(", ");
-                                    writeLine();
-                                    emit(jsxChild);
-                                }
-                            }
-                        }
-                        if (multipleEmittableChildren) {
-                            decreaseIndent();
-                        }
-                        else if (firstChild) {
-                            if (firstChild.kind !== 241 /* JsxElement */ && firstChild.kind !== 242 /* JsxSelfClosingElement */) {
-                                emit(firstChild);
-                            }
-                            else {
-                                // If the only child is jsx element, put it on a new indented line
-                                increaseIndent();
-                                writeLine();
-                                emit(firstChild);
-                                writeLine();
-                                decreaseIndent();
-                            }
-                        }
-                    }
-                    // Closing paren
-                    write(")"); // closes "React.createElement("
-                    emitTrailingComments(openingNode);
-                }
-                if (node.kind === 241 /* JsxElement */) {
-                    emitJsxElement(node.openingElement, node.children);
-                }
-                else {
-                    ts.Debug.assert(node.kind === 242 /* JsxSelfClosingElement */);
-                    emitJsxElement(node);
-                }
-            }
-            function jsxEmitPreserve(node) {
-                function emitJsxAttribute(node) {
-                    emit(node.name);
-                    if (node.initializer) {
-                        write("=");
-                        emit(node.initializer);
-                    }
-                }
-                function emitJsxSpreadAttribute(node) {
-                    write("{...");
-                    emit(node.expression);
-                    write("}");
-                }
-                function emitAttributes(attribs) {
-                    for (var i = 0, n = attribs.length; i < n; i++) {
-                        if (i > 0) {
-                            write(" ");
-                        }
-                        if (attribs[i].kind === 247 /* JsxSpreadAttribute */) {
-                            emitJsxSpreadAttribute(attribs[i]);
-                        }
-                        else {
-                            ts.Debug.assert(attribs[i].kind === 246 /* JsxAttribute */);
-                            emitJsxAttribute(attribs[i]);
-                        }
-                    }
-                }
-                function emitJsxOpeningOrSelfClosingElement(node) {
-                    write("<");
-                    emit(node.tagName);
-                    if (node.attributes.length > 0 || (node.kind === 242 /* JsxSelfClosingElement */)) {
-                        write(" ");
-                    }
-                    emitAttributes(node.attributes);
-                    if (node.kind === 242 /* JsxSelfClosingElement */) {
-                        write("/>");
-                    }
-                    else {
-                        write(">");
-                    }
-                }
-                function emitJsxClosingElement(node) {
-                    write("</");
-                    emit(node.tagName);
-                    write(">");
-                }
-                function emitJsxElement(node) {
-                    emitJsxOpeningOrSelfClosingElement(node.openingElement);
-                    for (var i = 0, n = node.children.length; i < n; i++) {
-                        emit(node.children[i]);
-                    }
-                    emitJsxClosingElement(node.closingElement);
-                }
-                if (node.kind === 241 /* JsxElement */) {
-                    emitJsxElement(node);
-                }
-                else {
-                    ts.Debug.assert(node.kind === 242 /* JsxSelfClosingElement */);
-                    emitJsxOpeningOrSelfClosingElement(node);
-                }
-            }
-            // This function specifically handles numeric/string literals for enum and accessor 'identifiers'.
-            // In a sense, it does not actually emit identifiers as much as it declares a name for a specific property.
-            // For example, this is utilized when feeding in a result to Object.defineProperty.
-            function emitExpressionForPropertyName(node) {
-                ts.Debug.assert(node.kind !== 169 /* BindingElement */);
-                if (node.kind === 9 /* StringLiteral */) {
-                    emitLiteral(node);
-                }
-                else if (node.kind === 140 /* ComputedPropertyName */) {
-                    // if this is a decorated computed property, we will need to capture the result
-                    // of the property expression so that we can apply decorators later. This is to ensure
-                    // we don't introduce unintended side effects:
-                    //
-                    //   class C {
-                    //     [_a = x]() { }
-                    //   }
-                    //
-                    // The emit for the decorated computed property decorator is:
-                    //
-                    //   __decorate([dec], C.prototype, _a, Object.getOwnPropertyDescriptor(C.prototype, _a));
-                    //
-                    if (ts.nodeIsDecorated(node.parent)) {
-                        if (!computedPropertyNamesToGeneratedNames) {
-                            computedPropertyNamesToGeneratedNames = [];
-                        }
-                        var generatedName = computedPropertyNamesToGeneratedNames[ts.getNodeId(node)];
-                        if (generatedName) {
-                            // we have already generated a variable for this node, write that value instead.
-                            write(generatedName);
-                            return;
-                        }
-                        generatedName = createAndRecordTempVariable(0 /* Auto */).text;
-                        computedPropertyNamesToGeneratedNames[ts.getNodeId(node)] = generatedName;
-                        write(generatedName);
-                        write(" = ");
-                    }
-                    emit(node.expression);
-                }
-                else {
-                    write('"');
-                    if (node.kind === 8 /* NumericLiteral */) {
-                        write(node.text);
-                    }
-                    else {
-                        writeTextOfNode(currentText, node);
-                    }
-                    write('"');
-                }
-            }
-            function isExpressionIdentifier(node) {
-                var parent = node.parent;
-                switch (parent.kind) {
-                    case 170 /* ArrayLiteralExpression */:
-                    case 195 /* AsExpression */:
-                    case 184 /* AwaitExpression */:
-                    case 187 /* BinaryExpression */:
-                    case 174 /* CallExpression */:
-                    case 249 /* CaseClause */:
-                    case 140 /* ComputedPropertyName */:
-                    case 188 /* ConditionalExpression */:
-                    case 143 /* Decorator */:
-                    case 181 /* DeleteExpression */:
-                    case 204 /* DoStatement */:
-                    case 173 /* ElementAccessExpression */:
-                    case 235 /* ExportAssignment */:
-                    case 202 /* ExpressionStatement */:
-                    case 194 /* ExpressionWithTypeArguments */:
-                    case 206 /* ForStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 203 /* IfStatement */:
-                    case 245 /* JsxClosingElement */:
-                    case 242 /* JsxSelfClosingElement */:
-                    case 243 /* JsxOpeningElement */:
-                    case 247 /* JsxSpreadAttribute */:
-                    case 248 /* JsxExpression */:
-                    case 175 /* NewExpression */:
-                    case 196 /* NonNullExpression */:
-                    case 178 /* ParenthesizedExpression */:
-                    case 186 /* PostfixUnaryExpression */:
-                    case 185 /* PrefixUnaryExpression */:
-                    case 211 /* ReturnStatement */:
-                    case 254 /* ShorthandPropertyAssignment */:
-                    case 191 /* SpreadElementExpression */:
-                    case 213 /* SwitchStatement */:
-                    case 176 /* TaggedTemplateExpression */:
-                    case 197 /* TemplateSpan */:
-                    case 215 /* ThrowStatement */:
-                    case 177 /* TypeAssertionExpression */:
-                    case 182 /* TypeOfExpression */:
-                    case 183 /* VoidExpression */:
-                    case 205 /* WhileStatement */:
-                    case 212 /* WithStatement */:
-                    case 190 /* YieldExpression */:
-                        return true;
-                    case 169 /* BindingElement */:
-                    case 255 /* EnumMember */:
-                    case 142 /* Parameter */:
-                    case 253 /* PropertyAssignment */:
-                    case 145 /* PropertyDeclaration */:
-                    case 218 /* VariableDeclaration */:
-                        return parent.initializer === node;
-                    case 172 /* PropertyAccessExpression */:
-                        return parent.expression === node;
-                    case 180 /* ArrowFunction */:
-                    case 179 /* FunctionExpression */:
-                        return parent.body === node;
-                    case 229 /* ImportEqualsDeclaration */:
-                        return parent.moduleReference === node;
-                    case 139 /* QualifiedName */:
-                        return parent.left === node;
-                }
-                return false;
-            }
-            function emitExpressionIdentifier(node) {
-                var container = resolver.getReferencedExportContainer(node);
-                if (container) {
-                    if (container.kind === 256 /* SourceFile */) {
-                        // Identifier references module export
-                        if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
-                            write("exports.");
-                        }
-                    }
-                    else {
-                        // Identifier references namespace export
-                        write(getGeneratedNameForNode(container));
-                        write(".");
-                    }
-                }
-                else {
-                    if (modulekind !== ts.ModuleKind.ES6) {
-                        var declaration = resolver.getReferencedImportDeclaration(node);
-                        if (declaration) {
-                            if (declaration.kind === 231 /* ImportClause */) {
-                                // Identifier references default import
-                                write(getGeneratedNameForNode(declaration.parent));
-                                write(languageVersion === 0 /* ES3 */ ? '["default"]' : ".default");
-                                return;
-                            }
-                            else if (declaration.kind === 234 /* ImportSpecifier */) {
-                                // Identifier references named import
-                                write(getGeneratedNameForNode(declaration.parent.parent.parent));
-                                var name_25 = declaration.propertyName || declaration.name;
-                                var identifier = ts.getTextOfNodeFromSourceText(currentText, name_25);
-                                if (languageVersion === 0 /* ES3 */ && identifier === "default") {
-                                    write('["default"]');
-                                }
-                                else {
-                                    write(".");
-                                    write(identifier);
-                                }
-                                return;
-                            }
-                        }
-                    }
-                    if (languageVersion < 2 /* ES6 */) {
-                        var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
-                        if (declaration) {
-                            write(getGeneratedNameForNode(declaration.name));
-                            return;
-                        }
-                    }
-                    else if (resolver.getNodeCheckFlags(node) & 1048576 /* BodyScopedClassBinding */) {
-                        // Due to the emit for class decorators, any reference to the class from inside of the class body
-                        // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
-                        // behavior of class names in ES6.
-                        var declaration = resolver.getReferencedValueDeclaration(node);
-                        if (declaration) {
-                            var classAlias = decoratedClassAliases[ts.getNodeId(declaration)];
-                            if (classAlias !== undefined) {
-                                write(classAlias);
-                                return;
-                            }
-                        }
-                    }
-                }
-                if (ts.nodeIsSynthesized(node)) {
-                    write(node.text);
-                }
-                else {
-                    writeTextOfNode(currentText, node);
-                }
-            }
-            function isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node) {
-                if (languageVersion < 2 /* ES6 */) {
-                    var parent_13 = node.parent;
-                    switch (parent_13.kind) {
-                        case 169 /* BindingElement */:
-                        case 221 /* ClassDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                        case 218 /* VariableDeclaration */:
-                            return parent_13.name === node && resolver.isDeclarationWithCollidingName(parent_13);
-                    }
-                }
-                return false;
-            }
-            function emitIdentifier(node) {
-                if (convertedLoopState) {
-                    if (node.text == "arguments" && resolver.isArgumentsLocalBinding(node)) {
-                        // in converted loop body arguments cannot be used directly.
-                        var name_26 = convertedLoopState.argumentsName || (convertedLoopState.argumentsName = makeUniqueName("arguments"));
-                        write(name_26);
-                        return;
-                    }
-                }
-                if (!node.parent) {
-                    write(node.text);
-                }
-                else if (isExpressionIdentifier(node)) {
-                    emitExpressionIdentifier(node);
-                }
-                else if (isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node)) {
-                    write(getGeneratedNameForNode(node));
-                }
-                else if (ts.nodeIsSynthesized(node)) {
-                    write(node.text);
-                }
-                else {
-                    writeTextOfNode(currentText, node);
-                }
-            }
-            function emitThis(node) {
-                if (resolver.getNodeCheckFlags(node) & 2 /* LexicalThis */) {
-                    write("_this");
-                }
-                else if (convertedLoopState) {
-                    write(convertedLoopState.thisName || (convertedLoopState.thisName = makeUniqueName("this")));
-                }
-                else {
-                    write("this");
-                }
-            }
-            function emitSuper(node) {
-                if (languageVersion >= 2 /* ES6 */) {
-                    write("super");
-                }
-                else {
-                    var flags = resolver.getNodeCheckFlags(node);
-                    if (flags & 256 /* SuperInstance */) {
-                        write("_super.prototype");
-                    }
-                    else {
-                        write("_super");
-                    }
-                }
-            }
-            function emitObjectBindingPattern(node) {
-                write("{ ");
-                var elements = node.elements;
-                emitList(elements, 0, elements.length, /*multiLine*/ false, /*trailingComma*/ elements.hasTrailingComma);
-                write(" }");
-            }
-            function emitArrayBindingPattern(node) {
-                write("[");
-                var elements = node.elements;
-                emitList(elements, 0, elements.length, /*multiLine*/ false, /*trailingComma*/ elements.hasTrailingComma);
-                write("]");
-            }
-            function emitBindingElement(node) {
-                if (node.propertyName) {
-                    emit(node.propertyName);
-                    write(": ");
-                }
-                if (node.dotDotDotToken) {
-                    write("...");
-                }
-                if (ts.isBindingPattern(node.name)) {
-                    emit(node.name);
-                }
-                else {
-                    emitModuleMemberName(node);
-                }
-                emitOptional(" = ", node.initializer);
-            }
-            function emitSpreadElementExpression(node) {
-                write("...");
-                emit(node.expression);
-            }
-            function emitYieldExpression(node) {
-                write(ts.tokenToString(114 /* YieldKeyword */));
-                if (node.asteriskToken) {
-                    write("*");
-                }
-                if (node.expression) {
-                    write(" ");
-                    emit(node.expression);
-                }
-            }
-            function emitAwaitExpression(node) {
-                var needsParenthesis = needsParenthesisForAwaitExpressionAsYield(node);
-                if (needsParenthesis) {
-                    write("(");
-                }
-                write(ts.tokenToString(114 /* YieldKeyword */));
-                write(" ");
-                emit(node.expression);
-                if (needsParenthesis) {
-                    write(")");
-                }
-            }
-            function needsParenthesisForAwaitExpressionAsYield(node) {
-                if (node.parent.kind === 187 /* BinaryExpression */ && !ts.isAssignmentOperator(node.parent.operatorToken.kind)) {
-                    return true;
-                }
-                else if (node.parent.kind === 188 /* ConditionalExpression */ && node.parent.condition === node) {
-                    return true;
-                }
-                return false;
-            }
-            function needsParenthesisForPropertyAccessOrInvocation(node) {
-                switch (node.kind) {
-                    case 69 /* Identifier */:
-                    case 170 /* ArrayLiteralExpression */:
-                    case 172 /* PropertyAccessExpression */:
-                    case 173 /* ElementAccessExpression */:
-                    case 174 /* CallExpression */:
-                    case 178 /* ParenthesizedExpression */:
-                        // This list is not exhaustive and only includes those cases that are relevant
-                        // to the check in emitArrayLiteral. More cases can be added as needed.
-                        return false;
-                }
-                return true;
-            }
-            function emitListWithSpread(elements, needsUniqueCopy, multiLine, trailingComma, useConcat) {
-                var pos = 0;
-                var group = 0;
-                var length = elements.length;
-                while (pos < length) {
-                    // Emit using the pattern <group0>.concat(<group1>, <group2>, ...)
-                    if (group === 1 && useConcat) {
-                        write(".concat(");
-                    }
-                    else if (group > 0) {
-                        write(", ");
-                    }
-                    var e = elements[pos];
-                    if (e.kind === 191 /* SpreadElementExpression */) {
-                        e = e.expression;
-                        emitParenthesizedIf(e, /*parenthesized*/ group === 0 && needsParenthesisForPropertyAccessOrInvocation(e));
-                        pos++;
-                        if (pos === length && group === 0 && needsUniqueCopy && e.kind !== 170 /* ArrayLiteralExpression */) {
-                            write(".slice()");
-                        }
-                    }
-                    else {
-                        var i = pos;
-                        while (i < length && elements[i].kind !== 191 /* SpreadElementExpression */) {
-                            i++;
-                        }
-                        write("[");
-                        if (multiLine) {
-                            increaseIndent();
-                        }
-                        emitList(elements, pos, i - pos, multiLine, trailingComma && i === length);
-                        if (multiLine) {
-                            decreaseIndent();
-                        }
-                        write("]");
-                        pos = i;
-                    }
-                    group++;
-                }
-                if (group > 1) {
-                    if (useConcat) {
-                        write(")");
-                    }
-                }
-            }
-            function isSpreadElementExpression(node) {
-                return node.kind === 191 /* SpreadElementExpression */;
-            }
-            function emitArrayLiteral(node) {
-                var elements = node.elements;
-                if (elements.length === 0) {
-                    write("[]");
-                }
-                else if (languageVersion >= 2 /* ES6 */ || !ts.forEach(elements, isSpreadElementExpression)) {
-                    write("[");
-                    emitLinePreservingList(node, node.elements, elements.hasTrailingComma, /*spacesBetweenBraces*/ false);
-                    write("]");
-                }
-                else {
-                    emitListWithSpread(elements, /*needsUniqueCopy*/ true, /*multiLine*/ node.multiLine, 
-                    /*trailingComma*/ elements.hasTrailingComma, /*useConcat*/ true);
-                }
-            }
-            function emitObjectLiteralBody(node, numElements) {
-                if (numElements === 0) {
-                    write("{}");
-                    return;
-                }
-                write("{");
-                if (numElements > 0) {
-                    var properties = node.properties;
-                    // If we are not doing a downlevel transformation for object literals,
-                    // then try to preserve the original shape of the object literal.
-                    // Otherwise just try to preserve the formatting.
-                    if (numElements === properties.length) {
-                        emitLinePreservingList(node, properties, /*allowTrailingComma*/ languageVersion >= 1 /* ES5 */, /*spacesBetweenBraces*/ true);
-                    }
-                    else {
-                        var multiLine = node.multiLine;
-                        if (!multiLine) {
-                            write(" ");
-                        }
-                        else {
-                            increaseIndent();
-                        }
-                        emitList(properties, 0, numElements, /*multiLine*/ multiLine, /*trailingComma*/ false);
-                        if (!multiLine) {
-                            write(" ");
-                        }
-                        else {
-                            decreaseIndent();
-                        }
-                    }
-                }
-                write("}");
-            }
-            function emitDownlevelObjectLiteralWithComputedProperties(node, firstComputedPropertyIndex) {
-                var multiLine = node.multiLine;
-                var properties = node.properties;
-                write("(");
-                if (multiLine) {
-                    increaseIndent();
-                }
-                // For computed properties, we need to create a unique handle to the object
-                // literal so we can modify it without risking internal assignments tainting the object.
-                var tempVar = createAndRecordTempVariable(0 /* Auto */);
-                // Write out the first non-computed properties
-                // (or all properties if none of them are computed),
-                // then emit the rest through indexing on the temp variable.
-                emit(tempVar);
-                write(" = ");
-                emitObjectLiteralBody(node, firstComputedPropertyIndex);
-                for (var i = firstComputedPropertyIndex, n = properties.length; i < n; i++) {
-                    writeComma();
-                    var property = properties[i];
-                    emitStart(property);
-                    if (property.kind === 149 /* GetAccessor */ || property.kind === 150 /* SetAccessor */) {
-                        // TODO (drosen): Reconcile with 'emitMemberFunctions'.
-                        var accessors = ts.getAllAccessorDeclarations(node.properties, property);
-                        if (property !== accessors.firstAccessor) {
-                            continue;
-                        }
-                        write("Object.defineProperty(");
-                        emit(tempVar);
-                        write(", ");
-                        emitStart(property.name);
-                        emitExpressionForPropertyName(property.name);
-                        emitEnd(property.name);
-                        write(", {");
-                        increaseIndent();
-                        if (accessors.getAccessor) {
-                            writeLine();
-                            emitLeadingComments(accessors.getAccessor);
-                            write("get: ");
-                            emitStart(accessors.getAccessor);
-                            write("function ");
-                            emitSignatureAndBody(accessors.getAccessor);
-                            emitEnd(accessors.getAccessor);
-                            emitTrailingComments(accessors.getAccessor);
-                            write(",");
-                        }
-                        if (accessors.setAccessor) {
-                            writeLine();
-                            emitLeadingComments(accessors.setAccessor);
-                            write("set: ");
-                            emitStart(accessors.setAccessor);
-                            write("function ");
-                            emitSignatureAndBody(accessors.setAccessor);
-                            emitEnd(accessors.setAccessor);
-                            emitTrailingComments(accessors.setAccessor);
-                            write(",");
-                        }
-                        writeLine();
-                        write("enumerable: true,");
-                        writeLine();
-                        write("configurable: true");
-                        decreaseIndent();
-                        writeLine();
-                        write("})");
-                        emitEnd(property);
-                    }
-                    else {
-                        emitLeadingComments(property);
-                        emitStart(property.name);
-                        emit(tempVar);
-                        emitMemberAccessForPropertyName(property.name);
-                        emitEnd(property.name);
-                        write(" = ");
-                        if (property.kind === 253 /* PropertyAssignment */) {
-                            emit(property.initializer);
-                        }
-                        else if (property.kind === 254 /* ShorthandPropertyAssignment */) {
-                            emitExpressionIdentifier(property.name);
-                        }
-                        else if (property.kind === 147 /* MethodDeclaration */) {
-                            emitFunctionDeclaration(property);
-                        }
-                        else {
-                            ts.Debug.fail("ObjectLiteralElement type not accounted for: " + property.kind);
-                        }
-                    }
-                    emitEnd(property);
-                }
-                writeComma();
-                emit(tempVar);
-                if (multiLine) {
-                    decreaseIndent();
-                    writeLine();
-                }
-                write(")");
-                function writeComma() {
-                    if (multiLine) {
-                        write(",");
-                        writeLine();
-                    }
-                    else {
-                        write(", ");
-                    }
-                }
-            }
-            function emitObjectLiteral(node) {
-                var properties = node.properties;
-                if (languageVersion < 2 /* ES6 */) {
-                    var numProperties = properties.length;
-                    // Find the first computed property.
-                    // Everything until that point can be emitted as part of the initial object literal.
-                    var numInitialNonComputedProperties = numProperties;
-                    for (var i = 0, n = properties.length; i < n; i++) {
-                        if (properties[i].name.kind === 140 /* ComputedPropertyName */) {
-                            numInitialNonComputedProperties = i;
-                            break;
-                        }
-                    }
-                    var hasComputedProperty = numInitialNonComputedProperties !== properties.length;
-                    if (hasComputedProperty) {
-                        emitDownlevelObjectLiteralWithComputedProperties(node, numInitialNonComputedProperties);
-                        return;
-                    }
-                }
-                // Ordinary case: either the object has no computed properties
-                // or we're compiling with an ES6+ target.
-                emitObjectLiteralBody(node, properties.length);
-            }
-            function createBinaryExpression(left, operator, right, startsOnNewLine) {
-                var result = ts.createSynthesizedNode(187 /* BinaryExpression */, startsOnNewLine);
-                result.operatorToken = ts.createSynthesizedNode(operator);
-                result.left = left;
-                result.right = right;
-                return result;
-            }
-            function createPropertyAccessExpression(expression, name) {
-                var result = ts.createSynthesizedNode(172 /* PropertyAccessExpression */);
-                result.expression = parenthesizeForAccess(expression);
-                result.dotToken = ts.createSynthesizedNode(21 /* DotToken */);
-                result.name = name;
-                return result;
-            }
-            function createElementAccessExpression(expression, argumentExpression) {
-                var result = ts.createSynthesizedNode(173 /* ElementAccessExpression */);
-                result.expression = parenthesizeForAccess(expression);
-                result.argumentExpression = argumentExpression;
-                return result;
-            }
-            function parenthesizeForAccess(expr) {
-                // When diagnosing whether the expression needs parentheses, the decision should be based
-                // on the innermost expression in a chain of nested type assertions.
-                while (expr.kind === 177 /* TypeAssertionExpression */ ||
-                    expr.kind === 195 /* AsExpression */ ||
-                    expr.kind === 196 /* NonNullExpression */) {
-                    expr = expr.expression;
-                }
-                // isLeftHandSideExpression is almost the correct criterion for when it is not necessary
-                // to parenthesize the expression before a dot. The known exceptions are:
-                //
-                //    NewExpression:
-                //       new C.x        -> not the same as (new C).x
-                //    NumberLiteral
-                //       1.x            -> not the same as (1).x
-                //
-                if (ts.isLeftHandSideExpression(expr) &&
-                    expr.kind !== 175 /* NewExpression */ &&
-                    expr.kind !== 8 /* NumericLiteral */) {
-                    return expr;
-                }
-                var node = ts.createSynthesizedNode(178 /* ParenthesizedExpression */);
-                node.expression = expr;
-                return node;
-            }
-            function emitComputedPropertyName(node) {
-                write("[");
-                emitExpressionForPropertyName(node);
-                write("]");
-            }
-            function emitMethod(node) {
-                if (languageVersion >= 2 /* ES6 */ && node.asteriskToken) {
-                    write("*");
-                }
-                emit(node.name);
-                if (languageVersion < 2 /* ES6 */) {
-                    write(": function ");
-                }
-                emitSignatureAndBody(node);
-            }
-            function emitPropertyAssignment(node) {
-                emit(node.name);
-                write(": ");
-                // This is to ensure that we emit comment in the following case:
-                //      For example:
-                //          obj = {
-                //              id: /*comment1*/ ()=>void
-                //          }
-                // "comment1" is not considered to be leading comment for node.initializer
-                // but rather a trailing comment on the previous node.
-                emitTrailingCommentsOfPosition(node.initializer.pos);
-                emit(node.initializer);
-            }
-            // Return true if identifier resolves to an exported member of a namespace
-            function isNamespaceExportReference(node) {
-                var container = resolver.getReferencedExportContainer(node);
-                return container && container.kind !== 256 /* SourceFile */;
-            }
-            // Return true if identifier resolves to an imported identifier
-            function isImportedReference(node) {
-                var declaration = resolver.getReferencedImportDeclaration(node);
-                return declaration && (declaration.kind === 231 /* ImportClause */ || declaration.kind === 234 /* ImportSpecifier */);
-            }
-            function emitShorthandPropertyAssignment(node) {
-                // The name property of a short-hand property assignment is considered an expression position, so here
-                // we manually emit the identifier to avoid rewriting.
-                writeTextOfNode(currentText, node.name);
-                // If emitting pre-ES6 code, or if the name requires rewriting when resolved as an expression identifier,
-                // we emit a normal property assignment. For example:
-                //   module m {
-                //       export let y;
-                //   }
-                //   module m {
-                //       let obj = { y };
-                //   }
-                // Here we need to emit obj = { y : m.y } regardless of the output target.
-                // The same rules apply for imported identifiers when targeting module formats with indirect access to
-                // the imported identifiers. For example, when targeting CommonJS:
-                //
-                //   import {foo} from './foo';
-                //   export const baz = { foo };
-                //
-                // Must be transformed into:
-                //
-                //   const foo_1 = require('./foo');
-                //   exports.baz = { foo: foo_1.foo };
-                //
-                if (languageVersion < 2 /* ES6 */ || (modulekind !== ts.ModuleKind.ES6 && isImportedReference(node.name)) || isNamespaceExportReference(node.name)) {
-                    // Emit identifier as an identifier
-                    write(": ");
-                    emit(node.name);
-                }
-                if (languageVersion >= 2 /* ES6 */ && node.objectAssignmentInitializer) {
-                    write(" = ");
-                    emit(node.objectAssignmentInitializer);
-                }
-            }
-            function tryEmitConstantValue(node) {
-                var constantValue = tryGetConstEnumValue(node);
-                if (constantValue !== undefined) {
-                    write(constantValue.toString());
-                    if (!compilerOptions.removeComments) {
-                        var propertyName = node.kind === 172 /* PropertyAccessExpression */ ? ts.declarationNameToString(node.name) : ts.getTextOfNode(node.argumentExpression);
-                        write(" /* " + propertyName + " */");
-                    }
-                    return true;
-                }
-                return false;
-            }
-            function tryGetConstEnumValue(node) {
-                if (compilerOptions.isolatedModules) {
-                    return undefined;
-                }
-                return node.kind === 172 /* PropertyAccessExpression */ || node.kind === 173 /* ElementAccessExpression */
-                    ? resolver.getConstantValue(node)
-                    : undefined;
-            }
-            // Returns 'true' if the code was actually indented, false otherwise.
-            // If the code is not indented, an optional valueToWriteWhenNotIndenting will be
-            // emitted instead.
-            function indentIfOnDifferentLines(parent, node1, node2, valueToWriteWhenNotIndenting) {
-                var realNodesAreOnDifferentLines = !ts.nodeIsSynthesized(parent) && !nodeEndIsOnSameLineAsNodeStart(node1, node2);
-                // Always use a newline for synthesized code if the synthesizer desires it.
-                var synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2);
-                if (realNodesAreOnDifferentLines || synthesizedNodeIsOnDifferentLine) {
-                    increaseIndent();
-                    writeLine();
-                    return true;
-                }
-                else {
-                    if (valueToWriteWhenNotIndenting) {
-                        write(valueToWriteWhenNotIndenting);
-                    }
-                    return false;
-                }
-            }
-            function emitPropertyAccess(node) {
-                if (tryEmitConstantValue(node)) {
-                    return;
-                }
-                if (languageVersion === 2 /* ES6 */ &&
-                    node.expression.kind === 95 /* SuperKeyword */ &&
-                    isInAsyncMethodWithSuperInES6(node)) {
-                    var name_27 = ts.createSynthesizedNode(9 /* StringLiteral */);
-                    name_27.text = node.name.text;
-                    emitSuperAccessInAsyncMethod(node.expression, name_27);
-                    return;
-                }
-                emit(node.expression);
-                var indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, node.dotToken);
-                // 1 .toString is a valid property access, emit a space after the literal
-                // Also emit a space if expression is a integer const enum value - it will appear in generated code as numeric literal
-                var shouldEmitSpace = false;
-                if (!indentedBeforeDot) {
-                    if (node.expression.kind === 8 /* NumericLiteral */) {
-                        // check if numeric literal was originally written with a dot
-                        var text = ts.getTextOfNodeFromSourceText(currentText, node.expression);
-                        shouldEmitSpace = text.indexOf(ts.tokenToString(21 /* DotToken */)) < 0;
-                    }
-                    else {
-                        // check if constant enum value is integer
-                        var constantValue = tryGetConstEnumValue(node.expression);
-                        // isFinite handles cases when constantValue is undefined
-                        shouldEmitSpace = isFinite(constantValue) && Math.floor(constantValue) === constantValue;
-                    }
-                }
-                if (shouldEmitSpace) {
-                    write(" .");
-                }
-                else {
-                    write(".");
-                }
-                var indentedAfterDot = indentIfOnDifferentLines(node, node.dotToken, node.name);
-                emit(node.name);
-                decreaseIndentIf(indentedBeforeDot, indentedAfterDot);
-            }
-            function emitQualifiedName(node) {
-                emit(node.left);
-                write(".");
-                emit(node.right);
-            }
-            function emitQualifiedNameAsExpression(node, useFallback) {
-                if (node.left.kind === 69 /* Identifier */) {
-                    emitEntityNameAsExpression(node.left, useFallback);
-                }
-                else if (useFallback) {
-                    var temp = createAndRecordTempVariable(0 /* Auto */);
-                    write("(");
-                    emitNodeWithoutSourceMap(temp);
-                    write(" = ");
-                    emitEntityNameAsExpression(node.left, /*useFallback*/ true);
-                    write(") && ");
-                    emitNodeWithoutSourceMap(temp);
-                }
-                else {
-                    emitEntityNameAsExpression(node.left, /*useFallback*/ false);
-                }
-                write(".");
-                emit(node.right);
-            }
-            function emitEntityNameAsExpression(node, useFallback) {
-                switch (node.kind) {
-                    case 69 /* Identifier */:
-                        if (useFallback) {
-                            write("typeof ");
-                            emitExpressionIdentifier(node);
-                            write(" !== 'undefined' && ");
-                        }
-                        emitExpressionIdentifier(node);
-                        break;
-                    case 139 /* QualifiedName */:
-                        emitQualifiedNameAsExpression(node, useFallback);
-                        break;
-                    default:
-                        emitNodeWithoutSourceMap(node);
-                        break;
-                }
-            }
-            function emitIndexedAccess(node) {
-                if (tryEmitConstantValue(node)) {
-                    return;
-                }
-                if (languageVersion === 2 /* ES6 */ &&
-                    node.expression.kind === 95 /* SuperKeyword */ &&
-                    isInAsyncMethodWithSuperInES6(node)) {
-                    emitSuperAccessInAsyncMethod(node.expression, node.argumentExpression);
-                    return;
-                }
-                emit(node.expression);
-                write("[");
-                emit(node.argumentExpression);
-                write("]");
-            }
-            function hasSpreadElement(elements) {
-                return ts.forEach(elements, function (e) { return e.kind === 191 /* SpreadElementExpression */; });
-            }
-            function skipParentheses(node) {
-                while (node.kind === 178 /* ParenthesizedExpression */ ||
-                    node.kind === 177 /* TypeAssertionExpression */ ||
-                    node.kind === 195 /* AsExpression */ ||
-                    node.kind === 196 /* NonNullExpression */) {
-                    node = node.expression;
-                }
-                return node;
-            }
-            function emitCallTarget(node) {
-                if (node.kind === 69 /* Identifier */ || node.kind === 97 /* ThisKeyword */ || node.kind === 95 /* SuperKeyword */) {
-                    emit(node);
-                    return node;
-                }
-                var temp = createAndRecordTempVariable(0 /* Auto */);
-                write("(");
-                emit(temp);
-                write(" = ");
-                emit(node);
-                write(")");
-                return temp;
-            }
-            function emitCallWithSpread(node) {
-                var target;
-                var expr = skipParentheses(node.expression);
-                if (expr.kind === 172 /* PropertyAccessExpression */) {
-                    // Target will be emitted as "this" argument
-                    target = emitCallTarget(expr.expression);
-                    write(".");
-                    emit(expr.name);
-                }
-                else if (expr.kind === 173 /* ElementAccessExpression */) {
-                    // Target will be emitted as "this" argument
-                    target = emitCallTarget(expr.expression);
-                    write("[");
-                    emit(expr.argumentExpression);
-                    write("]");
-                }
-                else if (expr.kind === 95 /* SuperKeyword */) {
-                    target = expr;
-                    write("_super");
-                }
-                else {
-                    emit(node.expression);
-                }
-                write(".apply(");
-                if (target) {
-                    if (target.kind === 95 /* SuperKeyword */) {
-                        // Calls of form super(...) and super.foo(...)
-                        emitThis(target);
-                    }
-                    else {
-                        // Calls of form obj.foo(...)
-                        emit(target);
-                    }
-                }
-                else {
-                    // Calls of form foo(...)
-                    write("void 0");
-                }
-                write(", ");
-                emitListWithSpread(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*trailingComma*/ false, /*useConcat*/ true);
-                write(")");
-            }
-            function isInAsyncMethodWithSuperInES6(node) {
-                if (languageVersion === 2 /* ES6 */) {
-                    var container = ts.getSuperContainer(node, /*includeFunctions*/ false);
-                    if (container && resolver.getNodeCheckFlags(container) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function emitSuperAccessInAsyncMethod(superNode, argumentExpression) {
-                var container = ts.getSuperContainer(superNode, /*includeFunctions*/ false);
-                var isSuperBinding = resolver.getNodeCheckFlags(container) & 4096 /* AsyncMethodWithSuperBinding */;
-                write("_super(");
-                emit(argumentExpression);
-                write(isSuperBinding ? ").value" : ")");
-            }
-            function emitCallExpression(node) {
-                if (languageVersion < 2 /* ES6 */ && hasSpreadElement(node.arguments)) {
-                    emitCallWithSpread(node);
-                    return;
-                }
-                var expression = node.expression;
-                var superCall = false;
-                var isAsyncMethodWithSuper = false;
-                if (expression.kind === 95 /* SuperKeyword */) {
-                    emitSuper(expression);
-                    superCall = true;
-                }
-                else {
-                    superCall = ts.isSuperPropertyOrElementAccess(expression);
-                    isAsyncMethodWithSuper = superCall && isInAsyncMethodWithSuperInES6(node);
-                    emit(expression);
-                }
-                if (superCall && (languageVersion < 2 /* ES6 */ || isAsyncMethodWithSuper)) {
-                    write(".call(");
-                    emitThis(expression);
-                    if (node.arguments.length) {
-                        write(", ");
-                        emitCommaList(node.arguments);
-                    }
-                    write(")");
-                }
-                else {
-                    write("(");
-                    emitCommaList(node.arguments);
-                    write(")");
-                }
-            }
-            function emitNewExpression(node) {
-                write("new ");
-                // Spread operator logic is supported in new expressions in ES5 using a combination
-                // of Function.prototype.bind() and Function.prototype.apply().
-                //
-                //     Example:
-                //
-                //         var args = [1, 2, 3, 4, 5];
-                //         new Array(...args);
-                //
-                //     is compiled into the following ES5:
-                //
-                //         var args = [1, 2, 3, 4, 5];
-                //         new (Array.bind.apply(Array, [void 0].concat(args)));
-                //
-                // The 'thisArg' to 'bind' is ignored when invoking the result of 'bind' with 'new',
-                // Thus, we set it to undefined ('void 0').
-                if (languageVersion === 1 /* ES5 */ &&
-                    node.arguments &&
-                    hasSpreadElement(node.arguments)) {
-                    write("(");
-                    var target = emitCallTarget(node.expression);
-                    write(".bind.apply(");
-                    emit(target);
-                    write(", [void 0].concat(");
-                    emitListWithSpread(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*trailingComma*/ false, /*useConcat*/ false);
-                    write(")))");
-                    write("()");
-                }
-                else {
-                    emit(node.expression);
-                    if (node.arguments) {
-                        write("(");
-                        emitCommaList(node.arguments);
-                        write(")");
-                    }
-                }
-            }
-            function emitTaggedTemplateExpression(node) {
-                if (languageVersion >= 2 /* ES6 */) {
-                    emit(node.tag);
-                    write(" ");
-                    emit(node.template);
-                }
-                else {
-                    emitDownlevelTaggedTemplate(node);
-                }
-            }
-            function emitParenExpression(node) {
-                // If the node is synthesized, it means the emitter put the parentheses there,
-                // not the user. If we didn't want them, the emitter would not have put them
-                // there.
-                if (!ts.nodeIsSynthesized(node) && node.parent.kind !== 180 /* ArrowFunction */) {
-                    if (node.expression.kind === 177 /* TypeAssertionExpression */ ||
-                        node.expression.kind === 195 /* AsExpression */ ||
-                        node.expression.kind === 196 /* NonNullExpression */) {
-                        var operand = node.expression.expression;
-                        // Make sure we consider all nested cast expressions, e.g.:
-                        // (<any><number><any>-A).x;
-                        while (operand.kind === 177 /* TypeAssertionExpression */ ||
-                            operand.kind === 195 /* AsExpression */ ||
-                            operand.kind === 196 /* NonNullExpression */) {
-                            operand = operand.expression;
-                        }
-                        // We have an expression of the form: (<Type>SubExpr)
-                        // Emitting this as (SubExpr) is really not desirable. We would like to emit the subexpr as is.
-                        // Omitting the parentheses, however, could cause change in the semantics of the generated
-                        // code if the casted expression has a lower precedence than the rest of the expression, e.g.:
-                        //      (<any>new A).foo should be emitted as (new A).foo and not new A.foo
-                        //      (<any>typeof A).toString() should be emitted as (typeof A).toString() and not typeof A.toString()
-                        //      new (<any>A()) should be emitted as new (A()) and not new A()
-                        //      (<any>function foo() { })() should be emitted as an IIF (function foo(){})() and not declaration function foo(){} ()
-                        if (operand.kind !== 185 /* PrefixUnaryExpression */ &&
-                            operand.kind !== 183 /* VoidExpression */ &&
-                            operand.kind !== 182 /* TypeOfExpression */ &&
-                            operand.kind !== 181 /* DeleteExpression */ &&
-                            operand.kind !== 186 /* PostfixUnaryExpression */ &&
-                            operand.kind !== 175 /* NewExpression */ &&
-                            !(operand.kind === 174 /* CallExpression */ && node.parent.kind === 175 /* NewExpression */) &&
-                            !(operand.kind === 179 /* FunctionExpression */ && node.parent.kind === 174 /* CallExpression */) &&
-                            !(operand.kind === 8 /* NumericLiteral */ && node.parent.kind === 172 /* PropertyAccessExpression */)) {
-                            emit(operand);
-                            return;
-                        }
-                    }
-                }
-                write("(");
-                emit(node.expression);
-                write(")");
-            }
-            function emitDeleteExpression(node) {
-                write(ts.tokenToString(78 /* DeleteKeyword */));
-                write(" ");
-                emit(node.expression);
-            }
-            function emitVoidExpression(node) {
-                write(ts.tokenToString(103 /* VoidKeyword */));
-                write(" ");
-                emit(node.expression);
-            }
-            function emitTypeOfExpression(node) {
-                write(ts.tokenToString(101 /* TypeOfKeyword */));
-                write(" ");
-                emit(node.expression);
-            }
-            function isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node) {
-                if (!isCurrentFileSystemExternalModule() || node.kind !== 69 /* Identifier */ || ts.nodeIsSynthesized(node)) {
-                    return false;
-                }
-                var isVariableDeclarationOrBindingElement = node.parent && (node.parent.kind === 218 /* VariableDeclaration */ || node.parent.kind === 169 /* BindingElement */);
-                var targetDeclaration = isVariableDeclarationOrBindingElement
-                    ? node.parent
-                    : resolver.getReferencedValueDeclaration(node);
-                return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, /*isExported*/ true);
-            }
-            function emitPrefixUnaryExpression(node) {
-                var exportChanged = (node.operator === 41 /* PlusPlusToken */ || node.operator === 42 /* MinusMinusToken */) &&
-                    isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
-                if (exportChanged) {
-                    // emit
-                    // ++x
-                    // as
-                    // exports('x', ++x)
-                    write(exportFunctionForFile + "(\"");
-                    emitNodeWithoutSourceMap(node.operand);
-                    write("\", ");
-                }
-                write(ts.tokenToString(node.operator));
-                // In some cases, we need to emit a space between the operator and the operand. One obvious case
-                // is when the operator is an identifier, like delete or typeof. We also need to do this for plus
-                // and minus expressions in certain cases. Specifically, consider the following two cases (parens
-                // are just for clarity of exposition, and not part of the source code):
-                //
-                //  (+(+1))
-                //  (+(++1))
-                //
-                // We need to emit a space in both cases. In the first case, the absence of a space will make
-                // the resulting expression a prefix increment operation. And in the second, it will make the resulting
-                // expression a prefix increment whose operand is a plus expression - (++(+x))
-                // The same is true of minus of course.
-                if (node.operand.kind === 185 /* PrefixUnaryExpression */) {
-                    var operand = node.operand;
-                    if (node.operator === 35 /* PlusToken */ && (operand.operator === 35 /* PlusToken */ || operand.operator === 41 /* PlusPlusToken */)) {
-                        write(" ");
-                    }
-                    else if (node.operator === 36 /* MinusToken */ && (operand.operator === 36 /* MinusToken */ || operand.operator === 42 /* MinusMinusToken */)) {
-                        write(" ");
-                    }
-                }
-                emit(node.operand);
-                if (exportChanged) {
-                    write(")");
-                }
-            }
-            function emitPostfixUnaryExpression(node) {
-                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
-                if (exportChanged) {
-                    // export function returns the value that was passes as the second argument
-                    // however for postfix unary expressions result value should be the value before modification.
-                    // emit 'x++' as '(export('x', ++x) - 1)' and 'x--' as '(export('x', --x) + 1)'
-                    write("(" + exportFunctionForFile + "(\"");
-                    emitNodeWithoutSourceMap(node.operand);
-                    write("\", ");
-                    write(ts.tokenToString(node.operator));
-                    emit(node.operand);
-                    if (node.operator === 41 /* PlusPlusToken */) {
-                        write(") - 1)");
-                    }
-                    else {
-                        write(") + 1)");
-                    }
-                }
-                else {
-                    emit(node.operand);
-                    write(ts.tokenToString(node.operator));
-                }
-            }
-            function shouldHoistDeclarationInSystemJsModule(node) {
-                return isSourceFileLevelDeclarationInSystemJsModule(node, /*isExported*/ false);
-            }
-            /*
-             * Checks if given node is a source file level declaration (not nested in module/function).
-             * If 'isExported' is true - then declaration must also be exported.
-             * This function is used in two cases:
-             * - check if node is a exported source file level value to determine
-             *   if we should also export the value after its it changed
-             * - check if node is a source level declaration to emit it differently,
-             *   i.e non-exported variable statement 'var x = 1' is hoisted so
-             *   we we emit variable statement 'var' should be dropped.
-             */
-            function isSourceFileLevelDeclarationInSystemJsModule(node, isExported) {
-                if (!node || !isCurrentFileSystemExternalModule()) {
-                    return false;
-                }
-                var current = ts.getRootDeclaration(node).parent;
-                while (current) {
-                    if (current.kind === 256 /* SourceFile */) {
-                        return !isExported || ((ts.getCombinedNodeFlags(node) & 1 /* Export */) !== 0);
-                    }
-                    else if (ts.isDeclaration(current)) {
-                        return false;
-                    }
-                    else {
-                        current = current.parent;
-                    }
-                }
-            }
-            /**
-             * Emit ES7 exponentiation operator downlevel using Math.pow
-             * @param node a binary expression node containing exponentiationOperator (**, **=)
-             */
-            function emitExponentiationOperator(node) {
-                var leftHandSideExpression = node.left;
-                if (node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) {
-                    var synthesizedLHS = void 0;
-                    var shouldEmitParentheses = false;
-                    if (ts.isElementAccessExpression(leftHandSideExpression)) {
-                        shouldEmitParentheses = true;
-                        write("(");
-                        synthesizedLHS = ts.createSynthesizedNode(173 /* ElementAccessExpression */, /*startsOnNewLine*/ false);
-                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, /*canDefineTempVariablesInPlace*/ false, /*shouldEmitCommaBeforeAssignment*/ false);
-                        synthesizedLHS.expression = identifier;
-                        if (leftHandSideExpression.argumentExpression.kind !== 8 /* NumericLiteral */ &&
-                            leftHandSideExpression.argumentExpression.kind !== 9 /* StringLiteral */) {
-                            var tempArgumentExpression = createAndRecordTempVariable(268435456 /* _i */);
-                            synthesizedLHS.argumentExpression = tempArgumentExpression;
-                            emitAssignment(tempArgumentExpression, leftHandSideExpression.argumentExpression, /*shouldEmitCommaBeforeAssignment*/ true, leftHandSideExpression.expression);
-                        }
-                        else {
-                            synthesizedLHS.argumentExpression = leftHandSideExpression.argumentExpression;
-                        }
-                        write(", ");
-                    }
-                    else if (ts.isPropertyAccessExpression(leftHandSideExpression)) {
-                        shouldEmitParentheses = true;
-                        write("(");
-                        synthesizedLHS = ts.createSynthesizedNode(172 /* PropertyAccessExpression */, /*startsOnNewLine*/ false);
-                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, /*canDefineTempVariablesInPlace*/ false, /*shouldEmitCommaBeforeAssignment*/ false);
-                        synthesizedLHS.expression = identifier;
-                        synthesizedLHS.dotToken = leftHandSideExpression.dotToken;
-                        synthesizedLHS.name = leftHandSideExpression.name;
-                        write(", ");
-                    }
-                    emit(synthesizedLHS || leftHandSideExpression);
-                    write(" = ");
-                    write("Math.pow(");
-                    emit(synthesizedLHS || leftHandSideExpression);
-                    write(", ");
-                    emit(node.right);
-                    write(")");
-                    if (shouldEmitParentheses) {
-                        write(")");
-                    }
-                }
-                else {
-                    write("Math.pow(");
-                    emit(leftHandSideExpression);
-                    write(", ");
-                    emit(node.right);
-                    write(")");
-                }
-            }
-            function emitBinaryExpression(node) {
-                if (languageVersion < 2 /* ES6 */ && node.operatorToken.kind === 56 /* EqualsToken */ &&
-                    (node.left.kind === 171 /* ObjectLiteralExpression */ || node.left.kind === 170 /* ArrayLiteralExpression */)) {
-                    emitDestructuring(node, node.parent.kind === 202 /* ExpressionStatement */);
-                }
-                else {
-                    var exportChanged = node.operatorToken.kind >= 56 /* FirstAssignment */ &&
-                        node.operatorToken.kind <= 68 /* LastAssignment */ &&
-                        isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left);
-                    if (exportChanged) {
-                        // emit assignment 'x <op> y' as 'exports("x", x <op> y)'
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithoutSourceMap(node.left);
-                        write("\", ");
-                    }
-                    if (node.operatorToken.kind === 38 /* AsteriskAsteriskToken */ || node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) {
-                        // Downleveled emit exponentiation operator using Math.pow
-                        emitExponentiationOperator(node);
-                    }
-                    else {
-                        emit(node.left);
-                        // Add indentation before emit the operator if the operator is on different line
-                        // For example:
-                        //      3
-                        //      + 2;
-                        //   emitted as
-                        //      3
-                        //          + 2;
-                        var indentedBeforeOperator = indentIfOnDifferentLines(node, node.left, node.operatorToken, node.operatorToken.kind !== 24 /* CommaToken */ ? " " : undefined);
-                        write(ts.tokenToString(node.operatorToken.kind));
-                        var indentedAfterOperator = indentIfOnDifferentLines(node, node.operatorToken, node.right, " ");
-                        emit(node.right);
-                        decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator);
-                    }
-                    if (exportChanged) {
-                        write(")");
-                    }
-                }
-            }
-            function synthesizedNodeStartsOnNewLine(node) {
-                return ts.nodeIsSynthesized(node) && node.startsOnNewLine;
-            }
-            function emitConditionalExpression(node) {
-                emit(node.condition);
-                var indentedBeforeQuestion = indentIfOnDifferentLines(node, node.condition, node.questionToken, " ");
-                write("?");
-                var indentedAfterQuestion = indentIfOnDifferentLines(node, node.questionToken, node.whenTrue, " ");
-                emit(node.whenTrue);
-                decreaseIndentIf(indentedBeforeQuestion, indentedAfterQuestion);
-                var indentedBeforeColon = indentIfOnDifferentLines(node, node.whenTrue, node.colonToken, " ");
-                write(":");
-                var indentedAfterColon = indentIfOnDifferentLines(node, node.colonToken, node.whenFalse, " ");
-                emit(node.whenFalse);
-                decreaseIndentIf(indentedBeforeColon, indentedAfterColon);
-            }
-            // Helper function to decrease the indent if we previously indented.  Allows multiple
-            // previous indent values to be considered at a time.  This also allows caller to just
-            // call this once, passing in all their appropriate indent values, instead of needing
-            // to call this helper function multiple times.
-            function decreaseIndentIf(value1, value2) {
-                if (value1) {
-                    decreaseIndent();
-                }
-                if (value2) {
-                    decreaseIndent();
-                }
-            }
-            function isSingleLineEmptyBlock(node) {
-                if (node && node.kind === 199 /* Block */) {
-                    var block = node;
-                    return block.statements.length === 0 && nodeEndIsOnSameLineAsNodeStart(block, block);
-                }
-            }
-            function emitBlock(node) {
-                if (isSingleLineEmptyBlock(node)) {
-                    emitToken(15 /* OpenBraceToken */, node.pos);
-                    write(" ");
-                    emitToken(16 /* CloseBraceToken */, node.statements.end);
-                    return;
-                }
-                emitToken(15 /* OpenBraceToken */, node.pos);
-                increaseIndent();
-                if (node.kind === 226 /* ModuleBlock */) {
-                    ts.Debug.assert(node.parent.kind === 225 /* ModuleDeclaration */);
-                    emitCaptureThisForNodeIfNecessary(node.parent);
-                }
-                emitLines(node.statements);
-                if (node.kind === 226 /* ModuleBlock */) {
-                    emitTempDeclarations(/*newLine*/ true);
-                }
-                decreaseIndent();
-                writeLine();
-                emitToken(16 /* CloseBraceToken */, node.statements.end);
-            }
-            function emitEmbeddedStatement(node) {
-                if (node.kind === 199 /* Block */) {
-                    write(" ");
-                    emit(node);
-                }
-                else {
-                    increaseIndent();
-                    writeLine();
-                    emit(node);
-                    decreaseIndent();
-                }
-            }
-            function emitExpressionStatement(node) {
-                emitParenthesizedIf(node.expression, /*parenthesized*/ node.expression.kind === 180 /* ArrowFunction */);
-                write(";");
-            }
-            function emitIfStatement(node) {
-                var endPos = emitToken(88 /* IfKeyword */, node.pos);
-                write(" ");
-                endPos = emitToken(17 /* OpenParenToken */, endPos);
-                emit(node.expression);
-                emitToken(18 /* CloseParenToken */, node.expression.end);
-                emitEmbeddedStatement(node.thenStatement);
-                if (node.elseStatement) {
-                    writeLine();
-                    emitToken(80 /* ElseKeyword */, node.thenStatement.end);
-                    if (node.elseStatement.kind === 203 /* IfStatement */) {
-                        write(" ");
-                        emit(node.elseStatement);
-                    }
-                    else {
-                        emitEmbeddedStatement(node.elseStatement);
-                    }
-                }
-            }
-            function emitDoStatement(node) {
-                emitLoop(node, emitDoStatementWorker);
-            }
-            function emitDoStatementWorker(node, loop) {
-                write("do");
-                if (loop) {
-                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
-                }
-                else {
-                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
-                }
-                if (node.statement.kind === 199 /* Block */) {
-                    write(" ");
-                }
-                else {
-                    writeLine();
-                }
-                write("while (");
-                emit(node.expression);
-                write(");");
-            }
-            function emitWhileStatement(node) {
-                emitLoop(node, emitWhileStatementWorker);
-            }
-            function emitWhileStatementWorker(node, loop) {
-                write("while (");
-                emit(node.expression);
-                write(")");
-                if (loop) {
-                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
-                }
-                else {
-                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
-                }
-            }
-            /**
-             * Returns true if start of variable declaration list was emitted.
-             * Returns false if nothing was written - this can happen for source file level variable declarations
-             *     in system modules where such variable declarations are hoisted.
-             */
-            function tryEmitStartOfVariableDeclarationList(decl) {
-                if (shouldHoistVariable(decl, /*checkIfSourceFileLevelDecl*/ true)) {
-                    // variables in variable declaration list were already hoisted
-                    return false;
-                }
-                if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072 /* BlockScoped */) === 0) {
-                    // we are inside a converted loop - this can only happen in downlevel scenarios
-                    // record names for all variable declarations
-                    for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) {
-                        var varDecl = _b[_a];
-                        hoistVariableDeclarationFromLoop(convertedLoopState, varDecl);
-                    }
-                    return false;
-                }
-                emitStart(decl);
-                if (decl && languageVersion >= 2 /* ES6 */) {
-                    if (ts.isLet(decl)) {
-                        write("let ");
-                    }
-                    else if (ts.isConst(decl)) {
-                        write("const ");
-                    }
-                    else {
-                        write("var ");
-                    }
-                }
-                else {
-                    write("var ");
-                }
-                // Note here we specifically dont emit end so that if we are going to emit binding pattern
-                // we can alter the source map correctly
-                return true;
-            }
-            function emitVariableDeclarationListSkippingUninitializedEntries(list) {
-                var started = false;
-                for (var _a = 0, _b = list.declarations; _a < _b.length; _a++) {
-                    var decl = _b[_a];
-                    if (!decl.initializer) {
-                        continue;
-                    }
-                    if (!started) {
-                        started = true;
-                    }
-                    else {
-                        write(", ");
-                    }
-                    emit(decl);
-                }
-                return started;
-            }
-            function shouldConvertLoopBody(node) {
-                return languageVersion < 2 /* ES6 */ &&
-                    (resolver.getNodeCheckFlags(node) & 65536 /* LoopWithCapturedBlockScopedBinding */) !== 0;
-            }
-            function emitLoop(node, loopEmitter) {
-                var shouldConvert = shouldConvertLoopBody(node);
-                if (!shouldConvert) {
-                    loopEmitter(node, /* convertedLoop*/ undefined);
-                }
-                else {
-                    var loop = convertLoopBody(node);
-                    if (node.parent.kind === 214 /* LabeledStatement */) {
-                        // if parent of the loop was labeled statement - attach the label to loop skipping converted loop body
-                        emitLabelAndColon(node.parent);
-                    }
-                    loopEmitter(node, loop);
-                }
-            }
-            function convertLoopBody(node) {
-                var functionName = makeUniqueName("_loop");
-                var loopInitializer;
-                switch (node.kind) {
-                    case 206 /* ForStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                        var initializer = node.initializer;
-                        if (initializer && initializer.kind === 219 /* VariableDeclarationList */) {
-                            loopInitializer = node.initializer;
-                        }
-                        break;
-                }
-                var loopParameters;
-                var loopOutParameters;
-                if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3072 /* BlockScoped */)) {
-                    // if loop initializer contains block scoped variables - they should be passed to converted loop body as parameters
-                    loopParameters = [];
-                    for (var _a = 0, _b = loopInitializer.declarations; _a < _b.length; _a++) {
-                        var varDeclaration = _b[_a];
-                        processVariableDeclaration(varDeclaration.name);
-                    }
-                }
-                var bodyIsBlock = node.statement.kind === 199 /* Block */;
-                var paramList = loopParameters ? loopParameters.join(", ") : "";
-                writeLine();
-                write("var " + functionName + " = function(" + paramList + ")");
-                var convertedOuterLoopState = convertedLoopState;
-                convertedLoopState = { loopOutParameters: loopOutParameters };
-                if (convertedOuterLoopState) {
-                    // convertedOuterLoopState !== undefined means that this converted loop is nested in another converted loop.
-                    // if outer converted loop has already accumulated some state - pass it through
-                    if (convertedOuterLoopState.argumentsName) {
-                        // outer loop has already used 'arguments' so we've already have some name to alias it
-                        // use the same name in all nested loops
-                        convertedLoopState.argumentsName = convertedOuterLoopState.argumentsName;
-                    }
-                    if (convertedOuterLoopState.thisName) {
-                        // outer loop has already used 'this' so we've already have some name to alias it
-                        // use the same name in all nested loops
-                        convertedLoopState.thisName = convertedOuterLoopState.thisName;
-                    }
-                    if (convertedOuterLoopState.hoistedLocalVariables) {
-                        // we've already collected some non-block scoped variable declarations in enclosing loop
-                        // use the same storage in nested loop
-                        convertedLoopState.hoistedLocalVariables = convertedOuterLoopState.hoistedLocalVariables;
-                    }
-                }
-                write(" {");
-                writeLine();
-                increaseIndent();
-                if (bodyIsBlock) {
-                    emitLines(node.statement.statements);
-                }
-                else {
-                    emit(node.statement);
-                }
-                writeLine();
-                // end of loop body -> copy out parameter
-                copyLoopOutParameters(convertedLoopState, 1 /* ToOutParameter */, /*emitAsStatements*/ true);
-                decreaseIndent();
-                writeLine();
-                write("};");
-                writeLine();
-                if (loopOutParameters) {
-                    // declare variables to hold out params for loop body
-                    write("var ");
-                    for (var i = 0; i < loopOutParameters.length; i++) {
-                        if (i !== 0) {
-                            write(", ");
-                        }
-                        write(loopOutParameters[i].outParamName);
-                    }
-                    write(";");
-                    writeLine();
-                }
-                if (convertedLoopState.argumentsName) {
-                    // if alias for arguments is set
-                    if (convertedOuterLoopState) {
-                        // pass it to outer converted loop
-                        convertedOuterLoopState.argumentsName = convertedLoopState.argumentsName;
-                    }
-                    else {
-                        // this is top level converted loop and we need to create an alias for 'arguments' object
-                        write("var " + convertedLoopState.argumentsName + " = arguments;");
-                        writeLine();
-                    }
-                }
-                if (convertedLoopState.thisName) {
-                    // if alias for this is set
-                    if (convertedOuterLoopState) {
-                        // pass it to outer converted loop
-                        convertedOuterLoopState.thisName = convertedLoopState.thisName;
-                    }
-                    else {
-                        // this is top level converted loop so we need to create an alias for 'this' here
-                        // NOTE:
-                        // if converted loops were all nested in arrow function then we'll always emit '_this' so convertedLoopState.thisName will not be set.
-                        // If it is set this means that all nested loops are not nested in arrow function and it is safe to capture 'this'.
-                        write("var " + convertedLoopState.thisName + " = this;");
-                        writeLine();
-                    }
-                }
-                if (convertedLoopState.hoistedLocalVariables) {
-                    // if hoistedLocalVariables !== undefined this means that we've possibly collected some variable declarations to be hoisted later
-                    if (convertedOuterLoopState) {
-                        // pass them to outer converted loop
-                        convertedOuterLoopState.hoistedLocalVariables = convertedLoopState.hoistedLocalVariables;
-                    }
-                    else {
-                        // deduplicate and hoist collected variable declarations
-                        write("var ");
-                        var seen = void 0;
-                        for (var _c = 0, _d = convertedLoopState.hoistedLocalVariables; _c < _d.length; _c++) {
-                            var id = _d[_c];
-                            // Don't initialize seen unless we have at least one element.
-                            // Emit a comma to separate for all but the first element.
-                            if (!seen) {
-                                seen = {};
-                            }
-                            else {
-                                write(", ");
-                            }
-                            if (!ts.hasProperty(seen, id.text)) {
-                                emit(id);
-                                seen[id.text] = id.text;
-                            }
-                        }
-                        write(";");
-                        writeLine();
-                    }
-                }
-                var currentLoopState = convertedLoopState;
-                convertedLoopState = convertedOuterLoopState;
-                return { functionName: functionName, paramList: paramList, state: currentLoopState };
-                function processVariableDeclaration(name) {
-                    if (name.kind === 69 /* Identifier */) {
-                        var nameText = isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(name)
-                            ? getGeneratedNameForNode(name)
-                            : name.text;
-                        loopParameters.push(nameText);
-                        if (resolver.getNodeCheckFlags(name.parent) & 2097152 /* NeedsLoopOutParameter */) {
-                            var reassignedVariable = { originalName: name, outParamName: makeUniqueName("out_" + nameText) };
-                            (loopOutParameters || (loopOutParameters = [])).push(reassignedVariable);
-                        }
-                    }
-                    else {
-                        for (var _a = 0, _b = name.elements; _a < _b.length; _a++) {
-                            var element = _b[_a];
-                            processVariableDeclaration(element.name);
-                        }
-                    }
-                }
-            }
-            function emitNormalLoopBody(node, emitAsEmbeddedStatement) {
-                var saveAllowedNonLabeledJumps;
-                if (convertedLoopState) {
-                    // we get here if we are trying to emit normal loop loop inside converted loop
-                    // set allowedNonLabeledJumps to Break | Continue to mark that break\continue inside the loop should be emitted as is
-                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-                    convertedLoopState.allowedNonLabeledJumps = 2 /* Break */ | 4 /* Continue */;
-                }
-                if (emitAsEmbeddedStatement) {
-                    emitEmbeddedStatement(node.statement);
-                }
-                else if (node.statement.kind === 199 /* Block */) {
-                    emitLines(node.statement.statements);
-                }
-                else {
-                    writeLine();
-                    emit(node.statement);
-                }
-                if (convertedLoopState) {
-                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
-                }
-            }
-            function copyLoopOutParameters(state, copyDirection, emitAsStatements) {
-                if (state.loopOutParameters) {
-                    for (var _a = 0, _b = state.loopOutParameters; _a < _b.length; _a++) {
-                        var outParam = _b[_a];
-                        if (copyDirection === 0 /* ToOriginal */) {
-                            emitIdentifier(outParam.originalName);
-                            write(" = " + outParam.outParamName);
-                        }
-                        else {
-                            write(outParam.outParamName + " = ");
-                            emitIdentifier(outParam.originalName);
-                        }
-                        if (emitAsStatements) {
-                            write(";");
-                            writeLine();
-                        }
-                        else {
-                            write(", ");
-                        }
-                    }
-                }
-            }
-            function emitConvertedLoopCall(loop, emitAsBlock) {
-                if (emitAsBlock) {
-                    write(" {");
-                    writeLine();
-                    increaseIndent();
-                }
-                // loop is considered simple if it does not have any return statements or break\continue that transfer control outside of the loop
-                // simple loops are emitted as just 'loop()';
-                // NOTE: if loop uses only 'continue' it still will be emitted as simple loop
-                var isSimpleLoop = !(loop.state.nonLocalJumps & ~4 /* Continue */) &&
-                    !loop.state.labeledNonLocalBreaks &&
-                    !loop.state.labeledNonLocalContinues;
-                var loopResult = makeUniqueName("state");
-                if (!isSimpleLoop) {
-                    write("var " + loopResult + " = ");
-                }
-                write(loop.functionName + "(" + loop.paramList + ");");
-                writeLine();
-                copyLoopOutParameters(loop.state, 0 /* ToOriginal */, /*emitAsStatements*/ true);
-                if (!isSimpleLoop) {
-                    // for non simple loops we need to store result returned from converted loop function and use it to do dispatching
-                    // converted loop function can return:
-                    // - object - used when body of the converted loop contains return statement. Property "value" of this object stores retuned value
-                    // - string - used to dispatch jumps. "break" and "continue" are used to non-labeled jumps, other values are used to transfer control to
-                    //   different labels
-                    writeLine();
-                    if (loop.state.nonLocalJumps & 8 /* Return */) {
-                        write("if (typeof " + loopResult + " === \"object\") ");
-                        if (convertedLoopState) {
-                            // we are currently nested in another converted loop - return unwrapped result
-                            write("return " + loopResult + ";");
-                            // propagate 'hasReturn' flag to outer loop
-                            convertedLoopState.nonLocalJumps |= 8 /* Return */;
-                        }
-                        else {
-                            // top level converted loop - return unwrapped value
-                            write("return " + loopResult + ".value;");
-                        }
-                        writeLine();
-                    }
-                    if (loop.state.nonLocalJumps & 2 /* Break */) {
-                        write("if (" + loopResult + " === \"break\") break;");
-                        writeLine();
-                    }
-                    // in case of labeled breaks emit code that either breaks to some known label inside outer loop or delegates jump decision to outer loop
-                    emitDispatchTableForLabeledJumps(loopResult, loop.state, convertedLoopState);
-                }
-                if (emitAsBlock) {
-                    writeLine();
-                    decreaseIndent();
-                    write("}");
-                }
-                function emitDispatchTableForLabeledJumps(loopResultVariable, currentLoop, outerLoop) {
-                    if (!currentLoop.labeledNonLocalBreaks && !currentLoop.labeledNonLocalContinues) {
-                        return;
-                    }
-                    write("switch(" + loopResultVariable + ") {");
-                    increaseIndent();
-                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalBreaks, /*isBreak*/ true, loopResultVariable, outerLoop);
-                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalContinues, /*isBreak*/ false, loopResultVariable, outerLoop);
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-                function emitDispatchEntriesForLabeledJumps(table, isBreak, loopResultVariable, outerLoop) {
-                    if (!table) {
-                        return;
-                    }
-                    for (var labelText in table) {
-                        var labelMarker = table[labelText];
-                        writeLine();
-                        write("case \"" + labelMarker + "\": ");
-                        // if there are no outer converted loop or outer label in question is located inside outer converted loop
-                        // then emit labeled break\continue
-                        // otherwise propagate pair 'label -> marker' to outer converted loop and emit 'return labelMarker' so outer loop can later decide what to do
-                        if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) {
-                            if (isBreak) {
-                                write("break ");
-                            }
-                            else {
-                                write("continue ");
-                            }
-                            write(labelText + ";");
-                        }
-                        else {
-                            setLabeledJump(outerLoop, isBreak, labelText, labelMarker);
-                            write("return " + loopResultVariable + ";");
-                        }
-                    }
-                }
-            }
-            function emitForStatement(node) {
-                emitLoop(node, emitForStatementWorker);
-            }
-            function emitForStatementWorker(node, loop) {
-                var endPos = emitToken(86 /* ForKeyword */, node.pos);
-                write(" ");
-                endPos = emitToken(17 /* OpenParenToken */, endPos);
-                if (node.initializer && node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    var variableDeclarationList = node.initializer;
-                    var startIsEmitted = tryEmitStartOfVariableDeclarationList(variableDeclarationList);
-                    if (startIsEmitted) {
-                        emitCommaList(variableDeclarationList.declarations);
-                    }
-                    else {
-                        emitVariableDeclarationListSkippingUninitializedEntries(variableDeclarationList);
-                    }
-                }
-                else if (node.initializer) {
-                    emit(node.initializer);
-                }
-                write(";");
-                emitOptional(" ", node.condition);
-                write(";");
-                emitOptional(" ", node.incrementor);
-                write(")");
-                if (loop) {
-                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
-                }
-                else {
-                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
-                }
-            }
-            function emitForInOrForOfStatement(node) {
-                if (languageVersion < 2 /* ES6 */ && node.kind === 208 /* ForOfStatement */) {
-                    emitLoop(node, emitDownLevelForOfStatementWorker);
-                }
-                else {
-                    emitLoop(node, emitForInOrForOfStatementWorker);
-                }
-            }
-            function emitForInOrForOfStatementWorker(node, loop) {
-                var endPos = emitToken(86 /* ForKeyword */, node.pos);
-                write(" ");
-                endPos = emitToken(17 /* OpenParenToken */, endPos);
-                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    var variableDeclarationList = node.initializer;
-                    if (variableDeclarationList.declarations.length >= 1) {
-                        tryEmitStartOfVariableDeclarationList(variableDeclarationList);
-                        emit(variableDeclarationList.declarations[0]);
-                    }
-                }
-                else {
-                    emit(node.initializer);
-                }
-                if (node.kind === 207 /* ForInStatement */) {
-                    write(" in ");
-                }
-                else {
-                    write(" of ");
-                }
-                emit(node.expression);
-                emitToken(18 /* CloseParenToken */, node.expression.end);
-                if (loop) {
-                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
-                }
-                else {
-                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
-                }
-            }
-            function emitDownLevelForOfStatementWorker(node, loop) {
-                // The following ES6 code:
-                //
-                //    for (let v of expr) { }
-                //
-                // should be emitted as
-                //
-                //    for (let _i = 0, _a = expr; _i < _a.length; _i++) {
-                //        let v = _a[_i];
-                //    }
-                //
-                // where _a and _i are temps emitted to capture the RHS and the counter,
-                // respectively.
-                // When the left hand side is an expression instead of a let declaration,
-                // the "let v" is not emitted.
-                // When the left hand side is a let/const, the v is renamed if there is
-                // another v in scope.
-                // Note that all assignments to the LHS are emitted in the body, including
-                // all destructuring.
-                // Note also that because an extra statement is needed to assign to the LHS,
-                // for-of bodies are always emitted as blocks.
-                var endPos = emitToken(86 /* ForKeyword */, node.pos);
-                write(" ");
-                endPos = emitToken(17 /* OpenParenToken */, endPos);
-                // Do not emit the LHS let declaration yet, because it might contain destructuring.
-                // Do not call recordTempDeclaration because we are declaring the temps
-                // right here. Recording means they will be declared later.
-                // In the case where the user wrote an identifier as the RHS, like this:
-                //
-                //     for (let v of arr) { }
-                //
-                // we can't reuse 'arr' because it might be modified within the body of the loop.
-                var counter = createTempVariable(268435456 /* _i */);
-                var rhsReference = ts.createSynthesizedNode(69 /* Identifier */);
-                rhsReference.text = node.expression.kind === 69 /* Identifier */ ?
-                    makeUniqueName(node.expression.text) :
-                    makeTempVariableName(0 /* Auto */);
-                // This is the let keyword for the counter and rhsReference. The let keyword for
-                // the LHS will be emitted inside the body.
-                emitStart(node.expression);
-                write("var ");
-                // _i = 0
-                emitNodeWithoutSourceMap(counter);
-                write(" = 0");
-                emitEnd(node.expression);
-                // , _a = expr
-                write(", ");
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(rhsReference);
-                write(" = ");
-                emitNodeWithoutSourceMap(node.expression);
-                emitEnd(node.expression);
-                write("; ");
-                // _i < _a.length;
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(counter);
-                write(" < ");
-                emitNodeWithCommentsAndWithoutSourcemap(rhsReference);
-                write(".length");
-                emitEnd(node.expression);
-                write("; ");
-                // _i++)
-                emitStart(node.expression);
-                emitNodeWithoutSourceMap(counter);
-                write("++");
-                emitEnd(node.expression);
-                emitToken(18 /* CloseParenToken */, node.expression.end);
-                // Body
-                write(" {");
-                writeLine();
-                increaseIndent();
-                // Initialize LHS
-                // let v = _a[_i];
-                var rhsIterationValue = createElementAccessExpression(rhsReference, counter);
-                emitStart(node.initializer);
-                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
-                    write("var ");
-                    var variableDeclarationList = node.initializer;
-                    if (variableDeclarationList.declarations.length > 0) {
-                        var declaration = variableDeclarationList.declarations[0];
-                        if (ts.isBindingPattern(declaration.name)) {
-                            // This works whether the declaration is a var, let, or const.
-                            // It will use rhsIterationValue _a[_i] as the initializer.
-                            emitDestructuring(declaration, /*isAssignmentExpressionStatement*/ false, rhsIterationValue);
-                        }
-                        else {
-                            // The following call does not include the initializer, so we have
-                            // to emit it separately.
-                            emitNodeWithCommentsAndWithoutSourcemap(declaration);
-                            write(" = ");
-                            emitNodeWithoutSourceMap(rhsIterationValue);
-                        }
-                    }
-                    else {
-                        // It's an empty declaration list. This can only happen in an error case, if the user wrote
-                        //     for (let of []) {}
-                        emitNodeWithoutSourceMap(createTempVariable(0 /* Auto */));
-                        write(" = ");
-                        emitNodeWithoutSourceMap(rhsIterationValue);
-                    }
-                }
-                else {
-                    // Initializer is an expression. Emit the expression in the body, so that it's
-                    // evaluated on every iteration.
-                    var assignmentExpression = createBinaryExpression(node.initializer, 56 /* EqualsToken */, rhsIterationValue, /*startsOnNewLine*/ false);
-                    if (node.initializer.kind === 170 /* ArrayLiteralExpression */ || node.initializer.kind === 171 /* ObjectLiteralExpression */) {
-                        // This is a destructuring pattern, so call emitDestructuring instead of emit. Calling emit will not work, because it will cause
-                        // the BinaryExpression to be passed in instead of the expression statement, which will cause emitDestructuring to crash.
-                        emitDestructuring(assignmentExpression, /*isAssignmentExpressionStatement*/ true, /*value*/ undefined);
-                    }
-                    else {
-                        emitNodeWithCommentsAndWithoutSourcemap(assignmentExpression);
-                    }
-                }
-                emitEnd(node.initializer);
-                write(";");
-                if (loop) {
-                    writeLine();
-                    emitConvertedLoopCall(loop, /*emitAsBlock*/ false);
-                }
-                else {
-                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ false);
-                }
-                writeLine();
-                decreaseIndent();
-                write("}");
-            }
-            function emitBreakOrContinueStatement(node) {
-                if (convertedLoopState) {
-                    // check if we can emit break\continue as is
-                    // it is possible if either
-                    //   - break\continue is statement labeled and label is located inside the converted loop
-                    //   - break\continue is non-labeled and located in non-converted loop\switch statement
-                    var jump = node.kind === 210 /* BreakStatement */ ? 2 /* Break */ : 4 /* Continue */;
-                    var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) ||
-                        (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
-                    if (!canUseBreakOrContinue) {
-                        write("return ");
-                        // explicit exit from loop -> copy out parameters
-                        copyLoopOutParameters(convertedLoopState, 1 /* ToOutParameter */, /*emitAsStatements*/ false);
-                        if (!node.label) {
-                            if (node.kind === 210 /* BreakStatement */) {
-                                convertedLoopState.nonLocalJumps |= 2 /* Break */;
-                                write("\"break\";");
-                            }
-                            else {
-                                convertedLoopState.nonLocalJumps |= 4 /* Continue */;
-                                // note: return value is emitted only to simplify debugging, call to converted loop body does not do any dispatching on it.
-                                write("\"continue\";");
-                            }
-                        }
-                        else {
-                            var labelMarker = void 0;
-                            if (node.kind === 210 /* BreakStatement */) {
-                                labelMarker = "break-" + node.label.text;
-                                setLabeledJump(convertedLoopState, /*isBreak*/ true, node.label.text, labelMarker);
-                            }
-                            else {
-                                labelMarker = "continue-" + node.label.text;
-                                setLabeledJump(convertedLoopState, /*isBreak*/ false, node.label.text, labelMarker);
-                            }
-                            write("\"" + labelMarker + "\";");
-                        }
-                        return;
-                    }
-                }
-                emitToken(node.kind === 210 /* BreakStatement */ ? 70 /* BreakKeyword */ : 75 /* ContinueKeyword */, node.pos);
-                emitOptional(" ", node.label);
-                write(";");
-            }
-            function emitReturnStatement(node) {
-                if (convertedLoopState) {
-                    convertedLoopState.nonLocalJumps |= 8 /* Return */;
-                    write("return { value: ");
-                    if (node.expression) {
-                        emit(node.expression);
-                    }
-                    else {
-                        write("void 0");
-                    }
-                    write(" };");
-                    return;
-                }
-                emitToken(94 /* ReturnKeyword */, node.pos);
-                emitOptional(" ", node.expression);
-                write(";");
-            }
-            function emitWithStatement(node) {
-                write("with (");
-                emit(node.expression);
-                write(")");
-                emitEmbeddedStatement(node.statement);
-            }
-            function emitSwitchStatement(node) {
-                var endPos = emitToken(96 /* SwitchKeyword */, node.pos);
-                write(" ");
-                emitToken(17 /* OpenParenToken */, endPos);
-                emit(node.expression);
-                endPos = emitToken(18 /* CloseParenToken */, node.expression.end);
-                write(" ");
-                var saveAllowedNonLabeledJumps;
-                if (convertedLoopState) {
-                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
-                    // for switch statement allow only non-labeled break
-                    convertedLoopState.allowedNonLabeledJumps |= 2 /* Break */;
-                }
-                emitCaseBlock(node.caseBlock, endPos);
-                if (convertedLoopState) {
-                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
-                }
-            }
-            function emitCaseBlock(node, startPos) {
-                emitToken(15 /* OpenBraceToken */, startPos);
-                increaseIndent();
-                emitLines(node.clauses);
-                decreaseIndent();
-                writeLine();
-                emitToken(16 /* CloseBraceToken */, node.clauses.end);
-            }
-            function nodeStartPositionsAreOnSameLine(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node1.pos)) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
-            }
-            function nodeEndPositionsAreOnSameLine(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, node2.end);
-            }
-            function nodeEndIsOnSameLineAsNodeStart(node1, node2) {
-                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
-                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
-            }
-            function emitCaseOrDefaultClause(node) {
-                if (node.kind === 249 /* CaseClause */) {
-                    write("case ");
-                    emit(node.expression);
-                    write(":");
-                }
-                else {
-                    write("default:");
-                }
-                if (node.statements.length === 1 && nodeStartPositionsAreOnSameLine(node, node.statements[0])) {
-                    write(" ");
-                    emit(node.statements[0]);
-                }
-                else {
-                    increaseIndent();
-                    emitLines(node.statements);
-                    decreaseIndent();
-                }
-            }
-            function emitThrowStatement(node) {
-                write("throw ");
-                emit(node.expression);
-                write(";");
-            }
-            function emitTryStatement(node) {
-                write("try ");
-                emit(node.tryBlock);
-                emit(node.catchClause);
-                if (node.finallyBlock) {
-                    writeLine();
-                    write("finally ");
-                    emit(node.finallyBlock);
-                }
-            }
-            function emitCatchClause(node) {
-                writeLine();
-                var endPos = emitToken(72 /* CatchKeyword */, node.pos);
-                write(" ");
-                emitToken(17 /* OpenParenToken */, endPos);
-                emit(node.variableDeclaration);
-                emitToken(18 /* CloseParenToken */, node.variableDeclaration ? node.variableDeclaration.end : endPos);
-                write(" ");
-                emitBlock(node.block);
-            }
-            function emitDebuggerStatement(node) {
-                emitToken(76 /* DebuggerKeyword */, node.pos);
-                write(";");
-            }
-            function emitLabelAndColon(node) {
-                emit(node.label);
-                write(": ");
-            }
-            function emitLabeledStatement(node) {
-                if (!ts.isIterationStatement(node.statement, /* lookInLabeledStatements */ false) || !shouldConvertLoopBody(node.statement)) {
-                    emitLabelAndColon(node);
-                }
-                if (convertedLoopState) {
-                    if (!convertedLoopState.labels) {
-                        convertedLoopState.labels = {};
-                    }
-                    convertedLoopState.labels[node.label.text] = node.label.text;
-                }
-                emit(node.statement);
-                if (convertedLoopState) {
-                    convertedLoopState.labels[node.label.text] = undefined;
-                }
-            }
-            function getContainingModule(node) {
-                do {
-                    node = node.parent;
-                } while (node && node.kind !== 225 /* ModuleDeclaration */);
-                return node;
-            }
-            function emitContainingModuleName(node) {
-                var container = getContainingModule(node);
-                write(container ? getGeneratedNameForNode(container) : "exports");
-            }
-            function emitModuleMemberName(node) {
-                emitStart(node.name);
-                if (ts.getCombinedNodeFlags(node) & 1 /* Export */) {
-                    var container = getContainingModule(node);
-                    if (container) {
-                        write(getGeneratedNameForNode(container));
-                        write(".");
-                    }
-                    else if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
-                        write("exports.");
-                    }
-                }
-                emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                emitEnd(node.name);
-            }
-            function createVoidZero() {
-                var zero = ts.createSynthesizedNode(8 /* NumericLiteral */);
-                zero.text = "0";
-                var result = ts.createSynthesizedNode(183 /* VoidExpression */);
-                result.expression = zero;
-                return result;
-            }
-            function emitEs6ExportDefaultCompat(node) {
-                if (node.parent.kind === 256 /* SourceFile */) {
-                    ts.Debug.assert(!!(node.flags & 512 /* Default */) || node.kind === 235 /* ExportAssignment */);
-                    // only allow export default at a source file level
-                    if (modulekind === ts.ModuleKind.CommonJS || modulekind === ts.ModuleKind.AMD || modulekind === ts.ModuleKind.UMD) {
-                        if (!isEs6Module) {
-                            if (languageVersion !== 0 /* ES3 */) {
-                                // default value of configurable, enumerable, writable are `false`.
-                                write('Object.defineProperty(exports, "__esModule", { value: true });');
-                                writeLine();
-                            }
-                            else {
-                                write("exports.__esModule = true;");
-                                writeLine();
-                            }
-                        }
-                    }
-                }
-            }
-            function emitExportMemberAssignment(node) {
-                if (node.flags & 1 /* Export */) {
-                    writeLine();
-                    emitStart(node);
-                    // emit call to exporter only for top level nodes
-                    if (modulekind === ts.ModuleKind.System && node.parent === currentSourceFile) {
-                        // emit export default <smth> as
-                        // export("default", <smth>)
-                        write(exportFunctionForFile + "(\"");
-                        if (node.flags & 512 /* Default */) {
-                            write("default");
-                        }
-                        else {
-                            emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                        }
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(")");
-                    }
-                    else {
-                        if (node.flags & 512 /* Default */) {
-                            emitEs6ExportDefaultCompat(node);
-                            if (languageVersion === 0 /* ES3 */) {
-                                write('exports["default"]');
-                            }
-                            else {
-                                write("exports.default");
-                            }
-                        }
-                        else {
-                            emitModuleMemberName(node);
-                        }
-                        write(" = ");
-                        emitDeclarationName(node);
-                    }
-                    emitEnd(node);
-                    write(";");
-                }
-            }
-            function emitExportMemberAssignments(name) {
-                if (modulekind === ts.ModuleKind.System) {
-                    return;
-                }
-                if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
-                    for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
-                        var specifier = _b[_a];
-                        writeLine();
-                        emitStart(specifier.name);
-                        emitContainingModuleName(specifier);
-                        write(".");
-                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                        emitEnd(specifier.name);
-                        write(" = ");
-                        emitExpressionIdentifier(name);
-                        write(";");
-                    }
-                }
-            }
-            function emitExportSpecifierInSystemModule(specifier) {
-                ts.Debug.assert(modulekind === ts.ModuleKind.System);
-                if (!resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name) && !resolver.isValueAliasDeclaration(specifier)) {
-                    return;
-                }
-                writeLine();
-                emitStart(specifier.name);
-                write(exportFunctionForFile + "(\"");
-                emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                write("\", ");
-                emitExpressionIdentifier(specifier.propertyName || specifier.name);
-                write(")");
-                emitEnd(specifier.name);
-                write(";");
-            }
-            /**
-             * Emit an assignment to a given identifier, 'name', with a given expression, 'value'.
-             * @param name an identifier as a left-hand-side operand of the assignment
-             * @param value an expression as a right-hand-side operand of the assignment
-             * @param shouldEmitCommaBeforeAssignment a boolean indicating whether to prefix an assignment with comma
-             */
-            function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) {
-                if (shouldEmitCommaBeforeAssignment) {
-                    write(", ");
-                }
-                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name);
-                if (exportChanged) {
-                    write(exportFunctionForFile + "(\"");
-                    emitNodeWithCommentsAndWithoutSourcemap(name);
-                    write("\", ");
-                }
-                var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 /* VariableDeclaration */ || name.parent.kind === 169 /* BindingElement */);
-                // If this is first var declaration, we need to start at var/let/const keyword instead
-                // otherwise use nodeForSourceMap as the start position
-                emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap);
-                withTemporaryNoSourceMap(function () {
-                    if (isVariableDeclarationOrBindingElement) {
-                        emitModuleMemberName(name.parent);
-                    }
-                    else {
-                        emit(name);
-                    }
-                    write(" = ");
-                    emit(value);
-                });
-                emitEnd(nodeForSourceMap, /*stopOverridingSpan*/ true);
-                if (exportChanged) {
-                    write(")");
-                }
-            }
-            /**
-             * Create temporary variable, emit an assignment of the variable the given expression
-             * @param expression an expression to assign to the newly created temporary variable
-             * @param canDefineTempVariablesInPlace a boolean indicating whether you can define the temporary variable at an assignment location
-             * @param shouldEmitCommaBeforeAssignment a boolean indicating whether an assignment should prefix with comma
-             */
-            function emitTempVariableAssignment(expression, canDefineTempVariablesInPlace, shouldEmitCommaBeforeAssignment, sourceMapNode) {
-                var identifier = createTempVariable(0 /* Auto */);
-                if (!canDefineTempVariablesInPlace) {
-                    recordTempDeclaration(identifier);
-                }
-                emitAssignment(identifier, expression, shouldEmitCommaBeforeAssignment, sourceMapNode || expression.parent);
-                return identifier;
-            }
-            function isFirstVariableDeclaration(root) {
-                return root.kind === 218 /* VariableDeclaration */ &&
-                    root.parent.kind === 219 /* VariableDeclarationList */ &&
-                    root.parent.declarations[0] === root;
-            }
-            function emitDestructuring(root, isAssignmentExpressionStatement, value) {
-                var emitCount = 0;
-                // An exported declaration is actually emitted as an assignment (to a property on the module object), so
-                // temporary variables in an exported declaration need to have real declarations elsewhere
-                // Also temporary variables should be explicitly allocated for source level declarations when module target is system
-                // because actual variable declarations are hoisted
-                var canDefineTempVariablesInPlace = false;
-                if (root.kind === 218 /* VariableDeclaration */) {
-                    var isExported = ts.getCombinedNodeFlags(root) & 1 /* Export */;
-                    var isSourceLevelForSystemModuleKind = shouldHoistDeclarationInSystemJsModule(root);
-                    canDefineTempVariablesInPlace = !isExported && !isSourceLevelForSystemModuleKind;
-                }
-                else if (root.kind === 142 /* Parameter */) {
-                    canDefineTempVariablesInPlace = true;
-                }
-                if (root.kind === 187 /* BinaryExpression */) {
-                    emitAssignmentExpression(root);
-                }
-                else {
-                    ts.Debug.assert(!isAssignmentExpressionStatement);
-                    // If first variable declaration of variable statement correct the start location
-                    if (isFirstVariableDeclaration(root)) {
-                        // Use emit location of "var " as next emit start entry
-                        sourceMap.changeEmitSourcePos();
-                    }
-                    emitBindingElement(root, value);
-                }
-                /**
-                 * Ensures that there exists a declared identifier whose value holds the given expression.
-                 * This function is useful to ensure that the expression's value can be read from in subsequent expressions.
-                 * Unless 'reuseIdentifierExpressions' is false, 'expr' will be returned if it is just an identifier.
-                 *
-                 * @param expr the expression whose value needs to be bound.
-                 * @param reuseIdentifierExpressions true if identifier expressions can simply be returned;
-                 *                                   false if it is necessary to always emit an identifier.
-                 */
-                function ensureIdentifier(expr, reuseIdentifierExpressions, sourceMapNode) {
-                    if (expr.kind === 69 /* Identifier */ && reuseIdentifierExpressions) {
-                        return expr;
-                    }
-                    var identifier = emitTempVariableAssignment(expr, canDefineTempVariablesInPlace, emitCount > 0, sourceMapNode);
-                    emitCount++;
-                    return identifier;
-                }
-                function createDefaultValueCheck(value, defaultValue, sourceMapNode) {
-                    // The value expression will be evaluated twice, so for anything but a simple identifier
-                    // we need to generate a temporary variable
-                    // If the temporary variable needs to be emitted use the source Map node for assignment of that statement
-                    value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode);
-                    // Return the expression 'value === void 0 ? defaultValue : value'
-                    var equals = ts.createSynthesizedNode(187 /* BinaryExpression */);
-                    equals.left = value;
-                    equals.operatorToken = ts.createSynthesizedNode(32 /* EqualsEqualsEqualsToken */);
-                    equals.right = createVoidZero();
-                    return createConditionalExpression(equals, defaultValue, value);
-                }
-                function createConditionalExpression(condition, whenTrue, whenFalse) {
-                    var cond = ts.createSynthesizedNode(188 /* ConditionalExpression */);
-                    cond.condition = condition;
-                    cond.questionToken = ts.createSynthesizedNode(53 /* QuestionToken */);
-                    cond.whenTrue = whenTrue;
-                    cond.colonToken = ts.createSynthesizedNode(54 /* ColonToken */);
-                    cond.whenFalse = whenFalse;
-                    return cond;
-                }
-                function createNumericLiteral(value) {
-                    var node = ts.createSynthesizedNode(8 /* NumericLiteral */);
-                    node.text = "" + value;
-                    return node;
-                }
-                function createPropertyAccessForDestructuringProperty(object, propName) {
-                    var index;
-                    var nameIsComputed = propName.kind === 140 /* ComputedPropertyName */;
-                    if (nameIsComputed) {
-                        // TODO to handle when we look into sourcemaps for computed properties, for now use propName
-                        index = ensureIdentifier(propName.expression, /*reuseIdentifierExpressions*/ false, propName);
-                    }
-                    else {
-                        // We create a synthetic copy of the identifier in order to avoid the rewriting that might
-                        // otherwise occur when the identifier is emitted.
-                        index = ts.createSynthesizedNode(propName.kind);
-                        // We need to unescape identifier here because when parsing an identifier prefixing with "__"
-                        // the parser need to append "_" in order to escape colliding with magic identifiers such as "__proto__"
-                        // Therefore, in order to correctly emit identifiers that are written in original TypeScript file,
-                        // we will unescapeIdentifier to remove additional underscore (if no underscore is added, the function will return original input string)
-                        index.text = ts.unescapeIdentifier(propName.text);
-                    }
-                    return !nameIsComputed && index.kind === 69 /* Identifier */
-                        ? createPropertyAccessExpression(object, index)
-                        : createElementAccessExpression(object, index);
-                }
-                function createSliceCall(value, sliceIndex) {
-                    var call = ts.createSynthesizedNode(174 /* CallExpression */);
-                    var sliceIdentifier = ts.createSynthesizedNode(69 /* Identifier */);
-                    sliceIdentifier.text = "slice";
-                    call.expression = createPropertyAccessExpression(value, sliceIdentifier);
-                    call.arguments = ts.createSynthesizedNodeArray();
-                    call.arguments[0] = createNumericLiteral(sliceIndex);
-                    return call;
-                }
-                function emitObjectLiteralAssignment(target, value, sourceMapNode) {
-                    var properties = target.properties;
-                    if (properties.length !== 1) {
-                        // For anything but a single element destructuring we need to generate a temporary
-                        // to ensure value is evaluated exactly once.
-                        // When doing so we want to highlight the passed in source map node since thats the one needing this temp assignment
-                        value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode);
-                    }
-                    for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) {
-                        var p = properties_5[_a];
-                        if (p.kind === 253 /* PropertyAssignment */ || p.kind === 254 /* ShorthandPropertyAssignment */) {
-                            var propName = p.name;
-                            var target_1 = p.kind === 254 /* ShorthandPropertyAssignment */ ? p : p.initializer || propName;
-                            // Assignment for target = value.propName should highlight whole property, hence use p as source map node
-                            emitDestructuringAssignment(target_1, createPropertyAccessForDestructuringProperty(value, propName), p);
-                        }
-                    }
-                }
-                function emitArrayLiteralAssignment(target, value, sourceMapNode) {
-                    var elements = target.elements;
-                    if (elements.length !== 1) {
-                        // For anything but a single element destructuring we need to generate a temporary
-                        // to ensure value is evaluated exactly once.
-                        // When doing so we want to highlight the passed in source map node since thats the one needing this temp assignment
-                        value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode);
-                    }
-                    for (var i = 0; i < elements.length; i++) {
-                        var e = elements[i];
-                        if (e.kind !== 193 /* OmittedExpression */) {
-                            // Assignment for target = value.propName should highlight whole property, hence use e as source map node
-                            if (e.kind !== 191 /* SpreadElementExpression */) {
-                                emitDestructuringAssignment(e, createElementAccessExpression(value, createNumericLiteral(i)), e);
-                            }
-                            else if (i === elements.length - 1) {
-                                emitDestructuringAssignment(e.expression, createSliceCall(value, i), e);
-                            }
-                        }
-                    }
-                }
-                function emitDestructuringAssignment(target, value, sourceMapNode) {
-                    // When emitting target = value use source map node to highlight, including any temporary assignments needed for this
-                    if (target.kind === 254 /* ShorthandPropertyAssignment */) {
-                        if (target.objectAssignmentInitializer) {
-                            value = createDefaultValueCheck(value, target.objectAssignmentInitializer, sourceMapNode);
-                        }
-                        target = target.name;
-                    }
-                    else if (target.kind === 187 /* BinaryExpression */ && target.operatorToken.kind === 56 /* EqualsToken */) {
-                        value = createDefaultValueCheck(value, target.right, sourceMapNode);
-                        target = target.left;
-                    }
-                    if (target.kind === 171 /* ObjectLiteralExpression */) {
-                        emitObjectLiteralAssignment(target, value, sourceMapNode);
-                    }
-                    else if (target.kind === 170 /* ArrayLiteralExpression */) {
-                        emitArrayLiteralAssignment(target, value, sourceMapNode);
-                    }
-                    else {
-                        emitAssignment(target, value, /*shouldEmitCommaBeforeAssignment*/ emitCount > 0, sourceMapNode);
-                        emitCount++;
-                    }
-                }
-                function emitAssignmentExpression(root) {
-                    var target = root.left;
-                    var value = root.right;
-                    if (ts.isEmptyObjectLiteralOrArrayLiteral(target)) {
-                        emit(value);
-                    }
-                    else if (isAssignmentExpressionStatement) {
-                        // Source map node for root.left = root.right is root
-                        // but if root is synthetic, which could be in below case, use the target which is { a }
-                        // for ({a} of {a: string}) {
-                        // }
-                        emitDestructuringAssignment(target, value, ts.nodeIsSynthesized(root) ? target : root);
-                    }
-                    else {
-                        if (root.parent.kind !== 178 /* ParenthesizedExpression */) {
-                            write("(");
-                        }
-                        // Temporary assignment needed to emit root should highlight whole binary expression
-                        value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, root);
-                        // Source map node for root.left = root.right is root
-                        emitDestructuringAssignment(target, value, root);
-                        write(", ");
-                        emit(value);
-                        if (root.parent.kind !== 178 /* ParenthesizedExpression */) {
-                            write(")");
-                        }
-                    }
-                }
-                function emitBindingElement(target, value) {
-                    // Any temporary assignments needed to emit target = value should point to target
-                    if (target.initializer) {
-                        // Combine value and initializer
-                        value = value ? createDefaultValueCheck(value, target.initializer, target) : target.initializer;
-                    }
-                    else if (!value) {
-                        // Use 'void 0' in absence of value and initializer
-                        value = createVoidZero();
-                    }
-                    if (ts.isBindingPattern(target.name)) {
-                        var pattern = target.name;
-                        var elements = pattern.elements;
-                        var numElements = elements.length;
-                        if (numElements !== 1) {
-                            // For anything other than a single-element destructuring we need to generate a temporary
-                            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
-                            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
-                            // so in that case, we'll intentionally create that temporary.
-                            value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ numElements !== 0, target);
-                        }
-                        for (var i = 0; i < numElements; i++) {
-                            var element = elements[i];
-                            if (pattern.kind === 167 /* ObjectBindingPattern */) {
-                                // Rewrite element to a declaration with an initializer that fetches property
-                                var propName = element.propertyName || element.name;
-                                emitBindingElement(element, createPropertyAccessForDestructuringProperty(value, propName));
-                            }
-                            else if (element.kind !== 193 /* OmittedExpression */) {
-                                if (!element.dotDotDotToken) {
-                                    // Rewrite element to a declaration that accesses array element at index i
-                                    emitBindingElement(element, createElementAccessExpression(value, createNumericLiteral(i)));
-                                }
-                                else if (i === numElements - 1) {
-                                    emitBindingElement(element, createSliceCall(value, i));
-                                }
-                            }
-                        }
-                    }
-                    else {
-                        emitAssignment(target.name, value, /*shouldEmitCommaBeforeAssignment*/ emitCount > 0, target);
-                        emitCount++;
-                    }
-                }
-            }
-            function emitVariableDeclaration(node) {
-                if (ts.isBindingPattern(node.name)) {
-                    var isExported = ts.getCombinedNodeFlags(node) & 1 /* Export */;
-                    if (languageVersion >= 2 /* ES6 */ && (!isExported || modulekind === ts.ModuleKind.ES6)) {
-                        // emit ES6 destructuring only if target module is ES6 or variable is not exported
-                        // exported variables in CJS/AMD are prefixed with 'exports.' so result javascript { exports.toString } = 1; is illegal
-                        var isTopLevelDeclarationInSystemModule = modulekind === ts.ModuleKind.System &&
-                            shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ true);
-                        if (isTopLevelDeclarationInSystemModule) {
-                            // In System modules top level variables are hoisted
-                            // so variable declarations with destructuring are turned into destructuring assignments.
-                            // As a result, they will need parentheses to disambiguate object binding assignments from blocks.
-                            write("(");
-                        }
-                        emit(node.name);
-                        emitOptional(" = ", node.initializer);
-                        if (isTopLevelDeclarationInSystemModule) {
-                            write(")");
-                        }
-                    }
-                    else {
-                        emitDestructuring(node, /*isAssignmentExpressionStatement*/ false);
-                    }
-                }
-                else {
-                    var initializer = node.initializer;
-                    if (!initializer &&
-                        languageVersion < 2 /* ES6 */ &&
-                        // for names - binding patterns that lack initializer there is no point to emit explicit initializer
-                        // since downlevel codegen for destructuring will fail in the absence of initializer so all binding elements will say uninitialized
-                        node.name.kind === 69 /* Identifier */) {
-                        var container = ts.getEnclosingBlockScopeContainer(node);
-                        var flags = resolver.getNodeCheckFlags(node);
-                        // nested let bindings might need to be initialized explicitly to preserve ES6 semantic
-                        // { let x = 1; }
-                        // { let x; } // x here should be undefined. not 1
-                        // NOTES:
-                        // Top level bindings never collide with anything and thus don't require explicit initialization.
-                        // As for nested let bindings there are two cases:
-                        // - nested let bindings that were not renamed definitely should be initialized explicitly
-                        //   { let x = 1; }
-                        //   { let x; if (some-condition) { x = 1}; if (x) { /*1*/ } }
-                        //   Without explicit initialization code in /*1*/ can be executed even if some-condition is evaluated to false
-                        // - renaming introduces fresh name that should not collide with any existing names, however renamed bindings sometimes also should be
-                        //   explicitly initialized. One particular case: non-captured binding declared inside loop body (but not in loop initializer)
-                        //   let x;
-                        //   for (;;) {
-                        //       let x;
-                        //   }
-                        //   in downlevel codegen inner 'x' will be renamed so it won't collide with outer 'x' however it will should be reset on every iteration
-                        //   as if it was declared anew.
-                        //   * Why non-captured binding - because if loop contains block scoped binding captured in some function then loop body will be rewritten
-                        //   to have a fresh scope on every iteration so everything will just work.
-                        //   * Why loop initializer is excluded - since we've introduced a fresh name it already will be undefined.
-                        var isCapturedInFunction = flags & 131072 /* CapturedBlockScopedBinding */;
-                        var isDeclaredInLoop = flags & 262144 /* BlockScopedBindingInLoop */;
-                        var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(container) ||
-                            (isCapturedInFunction && isDeclaredInLoop && container.kind === 199 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false));
-                        var emittedAsNestedLetDeclaration = ts.getCombinedNodeFlags(node) & 1024 /* Let */ &&
-                            !emittedAsTopLevel;
-                        var emitExplicitInitializer = emittedAsNestedLetDeclaration &&
-                            container.kind !== 207 /* ForInStatement */ &&
-                            container.kind !== 208 /* ForOfStatement */ &&
-                            (!resolver.isDeclarationWithCollidingName(node) ||
-                                (isDeclaredInLoop && !isCapturedInFunction && !ts.isIterationStatement(container, /*lookInLabeledStatements*/ false)));
-                        if (emitExplicitInitializer) {
-                            initializer = createVoidZero();
-                        }
-                    }
-                    var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.name);
-                    if (exportChanged) {
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                        write("\", ");
-                    }
-                    emitModuleMemberName(node);
-                    emitOptional(" = ", initializer);
-                    if (exportChanged) {
-                        write(")");
-                    }
-                }
-            }
-            function emitExportVariableAssignments(node) {
-                if (node.kind === 193 /* OmittedExpression */) {
-                    return;
-                }
-                var name = node.name;
-                if (name.kind === 69 /* Identifier */) {
-                    emitExportMemberAssignments(name);
-                }
-                else if (ts.isBindingPattern(name)) {
-                    ts.forEach(name.elements, emitExportVariableAssignments);
-                }
-            }
-            function isES6ExportedDeclaration(node) {
-                return !!(node.flags & 1 /* Export */) &&
-                    modulekind === ts.ModuleKind.ES6 &&
-                    node.parent.kind === 256 /* SourceFile */;
-            }
-            function emitVariableStatement(node) {
-                var startIsEmitted = false;
-                if (node.flags & 1 /* Export */) {
-                    if (isES6ExportedDeclaration(node)) {
-                        // Exported ES6 module member
-                        write("export ");
-                        startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
-                    }
-                }
-                else {
-                    startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
-                }
-                if (startIsEmitted) {
-                    emitCommaList(node.declarationList.declarations);
-                    write(";");
-                }
-                else {
-                    var atLeastOneItem = emitVariableDeclarationListSkippingUninitializedEntries(node.declarationList);
-                    if (atLeastOneItem) {
-                        write(";");
-                    }
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
-                    ts.forEach(node.declarationList.declarations, emitExportVariableAssignments);
-                }
-            }
-            function shouldEmitLeadingAndTrailingCommentsForVariableStatement(node) {
-                // If we're not exporting the variables, there's nothing special here.
-                // Always emit comments for these nodes.
-                if (!(node.flags & 1 /* Export */)) {
-                    return true;
-                }
-                // If we are exporting, but it's a top-level ES6 module exports,
-                // we'll emit the declaration list verbatim, so emit comments too.
-                if (isES6ExportedDeclaration(node)) {
-                    return true;
-                }
-                // Otherwise, only emit if we have at least one initializer present.
-                for (var _a = 0, _b = node.declarationList.declarations; _a < _b.length; _a++) {
-                    var declaration = _b[_a];
-                    if (declaration.initializer) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function emitParameter(node) {
-                if (languageVersion < 2 /* ES6 */) {
-                    if (ts.isBindingPattern(node.name)) {
-                        var name_28 = createTempVariable(0 /* Auto */);
-                        if (!tempParameters) {
-                            tempParameters = [];
-                        }
-                        tempParameters.push(name_28);
-                        emit(name_28);
-                    }
-                    else {
-                        emit(node.name);
-                    }
-                }
-                else {
-                    if (node.dotDotDotToken) {
-                        write("...");
-                    }
-                    emit(node.name);
-                    emitOptional(" = ", node.initializer);
-                }
-            }
-            function emitDefaultValueAssignments(node) {
-                if (languageVersion < 2 /* ES6 */) {
-                    var tempIndex_1 = 0;
-                    ts.forEach(node.parameters, function (parameter) {
-                        // A rest parameter cannot have a binding pattern or an initializer,
-                        // so let's just ignore it.
-                        if (parameter.dotDotDotToken) {
-                            return;
-                        }
-                        var paramName = parameter.name, initializer = parameter.initializer;
-                        if (ts.isBindingPattern(paramName)) {
-                            // In cases where a binding pattern is simply '[]' or '{}',
-                            // we usually don't want to emit a var declaration; however, in the presence
-                            // of an initializer, we must emit that expression to preserve side effects.
-                            var hasBindingElements = paramName.elements.length > 0;
-                            if (hasBindingElements || initializer) {
-                                writeLine();
-                                write("var ");
-                                if (hasBindingElements) {
-                                    emitDestructuring(parameter, /*isAssignmentExpressionStatement*/ false, tempParameters[tempIndex_1]);
-                                }
-                                else {
-                                    emit(tempParameters[tempIndex_1]);
-                                    write(" = ");
-                                    emit(initializer);
-                                }
-                                write(";");
-                                tempIndex_1++;
-                            }
-                        }
-                        else if (initializer) {
-                            writeLine();
-                            emitStart(parameter);
-                            write("if (");
-                            emitNodeWithoutSourceMap(paramName);
-                            write(" === void 0)");
-                            emitEnd(parameter);
-                            write(" { ");
-                            emitStart(parameter);
-                            emitNodeWithCommentsAndWithoutSourcemap(paramName);
-                            write(" = ");
-                            emitNodeWithCommentsAndWithoutSourcemap(initializer);
-                            emitEnd(parameter);
-                            write("; }");
-                        }
-                    });
-                }
-            }
-            function emitRestParameter(node) {
-                if (languageVersion < 2 /* ES6 */ && ts.hasDeclaredRestParameter(node)) {
-                    var restIndex = node.parameters.length - 1;
-                    var restParam = node.parameters[restIndex];
-                    // A rest parameter cannot have a binding pattern, so let's just ignore it if it does.
-                    if (ts.isBindingPattern(restParam.name)) {
-                        return;
-                    }
-                    var tempName = createTempVariable(268435456 /* _i */).text;
-                    writeLine();
-                    emitLeadingComments(restParam);
-                    emitStart(restParam);
-                    write("var ");
-                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
-                    write(" = [];");
-                    emitEnd(restParam);
-                    emitTrailingComments(restParam);
-                    writeLine();
-                    write("for (");
-                    emitStart(restParam);
-                    write("var " + tempName + " = " + restIndex + ";");
-                    emitEnd(restParam);
-                    write(" ");
-                    emitStart(restParam);
-                    write(tempName + " < arguments.length;");
-                    emitEnd(restParam);
-                    write(" ");
-                    emitStart(restParam);
-                    write(tempName + "++");
-                    emitEnd(restParam);
-                    write(") {");
-                    increaseIndent();
-                    writeLine();
-                    emitStart(restParam);
-                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
-                    write("[" + tempName + " - " + restIndex + "] = arguments[" + tempName + "];");
-                    emitEnd(restParam);
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function emitAccessor(node) {
-                write(node.kind === 149 /* GetAccessor */ ? "get " : "set ");
-                emit(node.name);
-                emitSignatureAndBody(node);
-            }
-            function shouldEmitAsArrowFunction(node) {
-                return node.kind === 180 /* ArrowFunction */ && languageVersion >= 2 /* ES6 */;
-            }
-            function emitDeclarationName(node) {
-                if (node.name) {
-                    emitNodeWithCommentsAndWithoutSourcemap(node.name);
-                }
-                else {
-                    write(getGeneratedNameForNode(node));
-                }
-            }
-            function shouldEmitFunctionName(node) {
-                if (node.kind === 179 /* FunctionExpression */) {
-                    // Emit name if one is present
-                    return !!node.name;
-                }
-                if (node.kind === 220 /* FunctionDeclaration */) {
-                    // Emit name if one is present, or emit generated name in down-level case (for export default case)
-                    return !!node.name || modulekind !== ts.ModuleKind.ES6;
-                }
-            }
-            function emitFunctionDeclaration(node) {
-                if (ts.nodeIsMissing(node.body)) {
-                    return emitCommentsOnNotEmittedNode(node);
-                }
-                // TODO (yuisu) : we should not have special cases to condition emitting comments
-                // but have one place to fix check for these conditions.
-                var kind = node.kind, parent = node.parent;
-                if (kind !== 147 /* MethodDeclaration */ &&
-                    kind !== 146 /* MethodSignature */ &&
-                    parent &&
-                    parent.kind !== 253 /* PropertyAssignment */ &&
-                    parent.kind !== 174 /* CallExpression */ &&
-                    parent.kind !== 170 /* ArrayLiteralExpression */) {
-                    // 1. Methods will emit comments at their assignment declaration sites.
-                    //
-                    // 2. If the function is a property of object literal, emitting leading-comments
-                    //    is done by emitNodeWithoutSourceMap which then call this function.
-                    //    In particular, we would like to avoid emit comments twice in following case:
-                    //
-                    //          var obj = {
-                    //              id:
-                    //                  /*comment*/ () => void
-                    //          }
-                    //
-                    // 3. If the function is an argument in call expression, emitting of comments will be
-                    //    taken care of in emit list of arguments inside of 'emitCallExpression'.
-                    //
-                    // 4. If the function is in an array literal, 'emitLinePreservingList' will take care
-                    //    of leading comments.
-                    emitLeadingComments(node);
-                }
-                emitStart(node);
-                // For targeting below es6, emit functions-like declaration including arrow function using function keyword.
-                // When targeting ES6, emit arrow function natively in ES6 by omitting function keyword and using fat arrow instead
-                if (!shouldEmitAsArrowFunction(node)) {
-                    if (isES6ExportedDeclaration(node)) {
-                        write("export ");
-                        if (node.flags & 512 /* Default */) {
-                            write("default ");
-                        }
-                    }
-                    write("function");
-                    if (languageVersion >= 2 /* ES6 */ && node.asteriskToken) {
-                        write("*");
-                    }
-                    write(" ");
-                }
-                if (shouldEmitFunctionName(node)) {
-                    emitDeclarationName(node);
-                }
-                emitSignatureAndBody(node);
-                if (modulekind !== ts.ModuleKind.ES6 && kind === 220 /* FunctionDeclaration */ && parent === currentSourceFile && node.name) {
-                    emitExportMemberAssignments(node.name);
-                }
-                emitEnd(node);
-                if (kind !== 147 /* MethodDeclaration */ &&
-                    kind !== 146 /* MethodSignature */ &&
-                    kind !== 180 /* ArrowFunction */) {
-                    emitTrailingComments(node);
-                }
-            }
-            function emitCaptureThisForNodeIfNecessary(node) {
-                if (resolver.getNodeCheckFlags(node) & 4 /* CaptureThis */) {
-                    writeLine();
-                    emitStart(node);
-                    write("var _this = this;");
-                    emitEnd(node);
-                }
-            }
-            function emitSignatureParameters(node) {
-                increaseIndent();
-                write("(");
-                if (node) {
-                    var parameters = node.parameters;
-                    var skipCount = node.parameters.length && node.parameters[0].name.text === "this" ? 1 : 0;
-                    var omitCount = languageVersion < 2 /* ES6 */ && ts.hasDeclaredRestParameter(node) ? 1 : 0;
-                    emitList(parameters, skipCount, parameters.length - omitCount - skipCount, /*multiLine*/ false, /*trailingComma*/ false);
-                }
-                write(")");
-                decreaseIndent();
-            }
-            function emitSignatureParametersForArrow(node) {
-                // Check whether the parameter list needs parentheses and preserve no-parenthesis
-                if (node.parameters.length === 1 && node.pos === node.parameters[0].pos) {
-                    emit(node.parameters[0]);
-                    return;
-                }
-                emitSignatureParameters(node);
-            }
-            function emitAsyncFunctionBodyForES6(node) {
-                var promiseConstructor = ts.getEntityNameFromTypeNode(node.type);
-                var isArrowFunction = node.kind === 180 /* ArrowFunction */;
-                var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192 /* CaptureArguments */) !== 0;
-                // An async function is emit as an outer function that calls an inner
-                // generator function. To preserve lexical bindings, we pass the current
-                // `this` and `arguments` objects to `__awaiter`. The generator function
-                // passed to `__awaiter` is executed inside of the callback to the
-                // promise constructor.
-                //
-                // The emit for an async arrow without a lexical `arguments` binding might be:
-                //
-                //  // input
-                //  let a = async (b) => { await b; }
-                //
-                //  // output
-                //  let a = (b) => __awaiter(this, void 0, void 0, function* () {
-                //      yield b;
-                //  });
-                //
-                // The emit for an async arrow with a lexical `arguments` binding might be:
-                //
-                //  // input
-                //  let a = async (b) => { await arguments[0]; }
-                //
-                //  // output
-                //  let a = (b) => __awaiter(this, arguments, void 0, function* (arguments) {
-                //      yield arguments[0];
-                //  });
-                //
-                // The emit for an async function expression without a lexical `arguments` binding
-                // might be:
-                //
-                //  // input
-                //  let a = async function (b) {
-                //      await b;
-                //  }
-                //
-                //  // output
-                //  let a = function (b) {
-                //      return __awaiter(this, void 0, void 0, function* () {
-                //          yield b;
-                //      });
-                //  }
-                //
-                // The emit for an async function expression with a lexical `arguments` binding
-                // might be:
-                //
-                //  // input
-                //  let a = async function (b) {
-                //      await arguments[0];
-                //  }
-                //
-                //  // output
-                //  let a = function (b) {
-                //      return __awaiter(this, arguments, void 0, function* (_arguments) {
-                //          yield _arguments[0];
-                //      });
-                //  }
-                //
-                // The emit for an async function expression with a lexical `arguments` binding
-                // and a return type annotation might be:
-                //
-                //  // input
-                //  let a = async function (b): MyPromise<any> {
-                //      await arguments[0];
-                //  }
-                //
-                //  // output
-                //  let a = function (b) {
-                //      return __awaiter(this, arguments, MyPromise, function* (_arguments) {
-                //          yield _arguments[0];
-                //      });
-                //  }
-                //
-                // If this is not an async arrow, emit the opening brace of the function body
-                // and the start of the return statement.
-                if (!isArrowFunction) {
-                    write(" {");
-                    increaseIndent();
-                    writeLine();
-                    if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
-                        writeLines("\nconst _super = (function (geti, seti) {\n    const cache = Object.create(null);\n    return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);");
-                        writeLine();
-                    }
-                    else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
-                        write("const _super = name => super[name];");
-                        writeLine();
-                    }
-                    write("return");
-                }
-                write(" __awaiter(this");
-                if (hasLexicalArguments) {
-                    write(", arguments, ");
-                }
-                else {
-                    write(", void 0, ");
-                }
-                if (languageVersion >= 2 /* ES6 */ || !promiseConstructor) {
-                    write("void 0");
-                }
-                else {
-                    emitEntityNameAsExpression(promiseConstructor, /*useFallback*/ false);
-                }
-                // Emit the call to __awaiter.
-                write(", function* ()");
-                // Emit the signature and body for the inner generator function.
-                emitFunctionBody(node);
-                write(")");
-                // If this is not an async arrow, emit the closing brace of the outer function body.
-                if (!isArrowFunction) {
-                    write(";");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function emitFunctionBody(node) {
-                if (!node.body) {
-                    // There can be no body when there are parse errors.  Just emit an empty block
-                    // in that case.
-                    write(" { }");
-                }
-                else {
-                    if (node.body.kind === 199 /* Block */) {
-                        emitBlockFunctionBody(node, node.body);
-                    }
-                    else {
-                        emitExpressionFunctionBody(node, node.body);
-                    }
-                }
-            }
-            function emitSignatureAndBody(node) {
-                var saveConvertedLoopState = convertedLoopState;
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                // When targeting ES6, emit arrow function natively in ES6
-                if (shouldEmitAsArrowFunction(node)) {
-                    emitSignatureParametersForArrow(node);
-                    write(" =>");
-                }
-                else {
-                    emitSignatureParameters(node);
-                }
-                var isAsync = ts.isAsyncFunctionLike(node);
-                if (isAsync) {
-                    emitAsyncFunctionBodyForES6(node);
-                }
-                else {
-                    emitFunctionBody(node);
-                }
-                if (!isES6ExportedDeclaration(node)) {
-                    emitExportMemberAssignment(node);
-                }
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-            }
-            // Returns true if any preamble code was emitted.
-            function emitFunctionBodyPreamble(node) {
-                emitCaptureThisForNodeIfNecessary(node);
-                emitDefaultValueAssignments(node);
-                emitRestParameter(node);
-            }
-            function emitExpressionFunctionBody(node, body) {
-                if (languageVersion < 2 /* ES6 */ || node.flags & 256 /* Async */) {
-                    emitDownLevelExpressionFunctionBody(node, body);
-                    return;
-                }
-                // For es6 and higher we can emit the expression as is.  However, in the case
-                // where the expression might end up looking like a block when emitted, we'll
-                // also wrap it in parentheses first.  For example if you have: a => <foo>{}
-                // then we need to generate: a => ({})
-                write(" ");
-                // Unwrap all type assertions.
-                var current = body;
-                while (current.kind === 177 /* TypeAssertionExpression */) {
-                    current = current.expression;
-                }
-                emitParenthesizedIf(body, current.kind === 171 /* ObjectLiteralExpression */);
-            }
-            function emitDownLevelExpressionFunctionBody(node, body) {
-                write(" {");
-                increaseIndent();
-                var outPos = writer.getTextPos();
-                emitDetachedCommentsAndUpdateCommentsInfo(node.body);
-                emitFunctionBodyPreamble(node);
-                var preambleEmitted = writer.getTextPos() !== outPos;
-                decreaseIndent();
-                // If we didn't have to emit any preamble code, then attempt to keep the arrow
-                // function on one line.
-                if (!preambleEmitted && nodeStartPositionsAreOnSameLine(node, body)) {
-                    write(" ");
-                    emitStart(body);
-                    write("return ");
-                    emit(body);
-                    emitEnd(body);
-                    write(";");
-                    emitTempDeclarations(/*newLine*/ false);
-                    write(" ");
-                }
-                else {
-                    increaseIndent();
-                    writeLine();
-                    emitLeadingComments(node.body);
-                    emitStart(body);
-                    write("return ");
-                    emit(body);
-                    emitEnd(body);
-                    write(";");
-                    emitTrailingComments(node.body);
-                    emitTempDeclarations(/*newLine*/ true);
-                    decreaseIndent();
-                    writeLine();
-                }
-                emitStart(node.body);
-                write("}");
-                emitEnd(node.body);
-            }
-            function emitBlockFunctionBody(node, body) {
-                write(" {");
-                var initialTextPos = writer.getTextPos();
-                increaseIndent();
-                emitDetachedCommentsAndUpdateCommentsInfo(body.statements);
-                // Emit all the directive prologues (like "use strict").  These have to come before
-                // any other preamble code we write (like parameter initializers).
-                var startIndex = emitDirectivePrologues(body.statements, /*startWithNewLine*/ true);
-                emitFunctionBodyPreamble(node);
-                decreaseIndent();
-                var preambleEmitted = writer.getTextPos() !== initialTextPos;
-                if (!preambleEmitted && nodeEndIsOnSameLineAsNodeStart(body, body)) {
-                    for (var _a = 0, _b = body.statements; _a < _b.length; _a++) {
-                        var statement = _b[_a];
-                        write(" ");
-                        emit(statement);
-                    }
-                    emitTempDeclarations(/*newLine*/ false);
-                    write(" ");
-                    emitLeadingCommentsOfPosition(body.statements.end);
-                }
-                else {
-                    increaseIndent();
-                    emitLinesStartingAt(body.statements, startIndex);
-                    emitTempDeclarations(/*newLine*/ true);
-                    writeLine();
-                    emitLeadingCommentsOfPosition(body.statements.end);
-                    decreaseIndent();
-                }
-                emitToken(16 /* CloseBraceToken */, body.statements.end);
-            }
-            /**
-             * Return the statement at a given index if it is a super-call statement
-             * @param ctor a constructor declaration
-             * @param index an index to constructor's body to check
-             */
-            function getSuperCallAtGivenIndex(ctor, index) {
-                if (!ctor.body) {
-                    return undefined;
-                }
-                var statements = ctor.body.statements;
-                if (!statements || index >= statements.length) {
-                    return undefined;
-                }
-                var statement = statements[index];
-                if (statement.kind === 202 /* ExpressionStatement */) {
-                    return ts.isSuperCallExpression(statement.expression) ? statement : undefined;
-                }
-            }
-            function emitParameterPropertyAssignments(node) {
-                ts.forEach(node.parameters, function (param) {
-                    if (param.flags & 92 /* ParameterPropertyModifier */) {
-                        writeLine();
-                        emitStart(param);
-                        emitStart(param.name);
-                        write("this.");
-                        emitNodeWithoutSourceMap(param.name);
-                        emitEnd(param.name);
-                        write(" = ");
-                        emit(param.name);
-                        write(";");
-                        emitEnd(param);
-                    }
-                });
-            }
-            function emitMemberAccessForPropertyName(memberName) {
-                // This does not emit source map because it is emitted by caller as caller
-                // is aware how the property name changes to the property access
-                // eg. public x = 10; becomes this.x and static x = 10 becomes className.x
-                if (memberName.kind === 9 /* StringLiteral */ || memberName.kind === 8 /* NumericLiteral */) {
-                    write("[");
-                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
-                    write("]");
-                }
-                else if (memberName.kind === 140 /* ComputedPropertyName */) {
-                    emitComputedPropertyName(memberName);
-                }
-                else {
-                    write(".");
-                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
-                }
-            }
-            function getInitializedProperties(node, isStatic) {
-                var properties = [];
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    if (member.kind === 145 /* PropertyDeclaration */ && isStatic === ((member.flags & 32 /* Static */) !== 0) && member.initializer) {
-                        properties.push(member);
-                    }
-                }
-                return properties;
-            }
-            function emitPropertyDeclarations(node, properties) {
-                for (var _a = 0, properties_6 = properties; _a < properties_6.length; _a++) {
-                    var property = properties_6[_a];
-                    emitPropertyDeclaration(node, property);
-                }
-            }
-            function emitPropertyDeclaration(node, property, receiver, isExpression) {
-                writeLine();
-                emitLeadingComments(property);
-                emitStart(property);
-                emitStart(property.name);
-                if (receiver) {
-                    emit(receiver);
-                }
-                else {
-                    if (property.flags & 32 /* Static */) {
-                        emitDeclarationName(node);
-                    }
-                    else {
-                        write("this");
-                    }
-                }
-                emitMemberAccessForPropertyName(property.name);
-                emitEnd(property.name);
-                write(" = ");
-                emit(property.initializer);
-                if (!isExpression) {
-                    write(";");
-                }
-                emitEnd(property);
-                emitTrailingComments(property);
-            }
-            function emitMemberFunctionsForES5AndLower(node) {
-                ts.forEach(node.members, function (member) {
-                    if (member.kind === 198 /* SemicolonClassElement */) {
-                        writeLine();
-                        write(";");
-                    }
-                    else if (member.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) {
-                        if (!member.body) {
-                            return emitCommentsOnNotEmittedNode(member);
-                        }
-                        writeLine();
-                        emitLeadingComments(member);
-                        emitStart(member);
-                        emitStart(member.name);
-                        emitClassMemberPrefix(node, member);
-                        emitMemberAccessForPropertyName(member.name);
-                        emitEnd(member.name);
-                        write(" = ");
-                        emitFunctionDeclaration(member);
-                        emitEnd(member);
-                        write(";");
-                        emitTrailingComments(member);
-                    }
-                    else if (member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */) {
-                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
-                        if (member === accessors.firstAccessor) {
-                            writeLine();
-                            emitStart(member);
-                            write("Object.defineProperty(");
-                            emitStart(member.name);
-                            emitClassMemberPrefix(node, member);
-                            write(", ");
-                            emitExpressionForPropertyName(member.name);
-                            emitEnd(member.name);
-                            write(", {");
-                            increaseIndent();
-                            if (accessors.getAccessor) {
-                                writeLine();
-                                emitLeadingComments(accessors.getAccessor);
-                                write("get: ");
-                                emitStart(accessors.getAccessor);
-                                write("function ");
-                                emitSignatureAndBody(accessors.getAccessor);
-                                emitEnd(accessors.getAccessor);
-                                emitTrailingComments(accessors.getAccessor);
-                                write(",");
-                            }
-                            if (accessors.setAccessor) {
-                                writeLine();
-                                emitLeadingComments(accessors.setAccessor);
-                                write("set: ");
-                                emitStart(accessors.setAccessor);
-                                write("function ");
-                                emitSignatureAndBody(accessors.setAccessor);
-                                emitEnd(accessors.setAccessor);
-                                emitTrailingComments(accessors.setAccessor);
-                                write(",");
-                            }
-                            writeLine();
-                            write("enumerable: true,");
-                            writeLine();
-                            write("configurable: true");
-                            decreaseIndent();
-                            writeLine();
-                            write("});");
-                            emitEnd(member);
-                        }
-                    }
-                });
-            }
-            function emitMemberFunctionsForES6AndHigher(node) {
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    if ((member.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) && !member.body) {
-                        emitCommentsOnNotEmittedNode(member);
-                    }
-                    else if (member.kind === 147 /* MethodDeclaration */ ||
-                        member.kind === 149 /* GetAccessor */ ||
-                        member.kind === 150 /* SetAccessor */) {
-                        writeLine();
-                        emitLeadingComments(member);
-                        emitStart(member);
-                        if (member.flags & 32 /* Static */) {
-                            write("static ");
-                        }
-                        if (member.kind === 149 /* GetAccessor */) {
-                            write("get ");
-                        }
-                        else if (member.kind === 150 /* SetAccessor */) {
-                            write("set ");
-                        }
-                        if (member.asteriskToken) {
-                            write("*");
-                        }
-                        emit(member.name);
-                        emitSignatureAndBody(member);
-                        emitEnd(member);
-                        emitTrailingComments(member);
-                    }
-                    else if (member.kind === 198 /* SemicolonClassElement */) {
-                        writeLine();
-                        write(";");
-                    }
-                }
-            }
-            function emitConstructor(node, baseTypeElement) {
-                var saveConvertedLoopState = convertedLoopState;
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                emitConstructorWorker(node, baseTypeElement);
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-            }
-            function emitConstructorWorker(node, baseTypeElement) {
-                // Check if we have property assignment inside class declaration.
-                // If there is property assignment, we need to emit constructor whether users define it or not
-                // If there is no property assignment, we can omit constructor if users do not define it
-                var hasInstancePropertyWithInitializer = false;
-                // Emit the constructor overload pinned comments
-                ts.forEach(node.members, function (member) {
-                    if (member.kind === 148 /* Constructor */ && !member.body) {
-                        emitCommentsOnNotEmittedNode(member);
-                    }
-                    // Check if there is any non-static property assignment
-                    if (member.kind === 145 /* PropertyDeclaration */ && member.initializer && (member.flags & 32 /* Static */) === 0) {
-                        hasInstancePropertyWithInitializer = true;
-                    }
-                });
-                var ctor = ts.getFirstConstructorWithBody(node);
-                // For target ES6 and above, if there is no user-defined constructor and there is no property assignment
-                // do not emit constructor in class declaration.
-                if (languageVersion >= 2 /* ES6 */ && !ctor && !hasInstancePropertyWithInitializer) {
-                    return;
-                }
-                if (ctor) {
-                    emitLeadingComments(ctor);
-                }
-                emitStart(ctor || node);
-                if (languageVersion < 2 /* ES6 */) {
-                    write("function ");
-                    emitDeclarationName(node);
-                    emitSignatureParameters(ctor);
-                }
-                else {
-                    write("constructor");
-                    if (ctor) {
-                        emitSignatureParameters(ctor);
-                    }
-                    else {
-                        // Based on EcmaScript6 section 14.5.14: Runtime Semantics: ClassDefinitionEvaluation.
-                        // If constructor is empty, then,
-                        //      If ClassHeritageopt is present, then
-                        //          Let constructor be the result of parsing the String "constructor(... args){ super (...args);}" using the syntactic grammar with the goal symbol MethodDefinition.
-                        //      Else,
-                        //          Let constructor be the result of parsing the String "constructor( ){ }" using the syntactic grammar with the goal symbol MethodDefinition
-                        if (baseTypeElement) {
-                            write("(...args)");
-                        }
-                        else {
-                            write("()");
-                        }
-                    }
-                }
-                var startIndex = 0;
-                write(" {");
-                increaseIndent();
-                if (ctor) {
-                    // Emit all the directive prologues (like "use strict").  These have to come before
-                    // any other preamble code we write (like parameter initializers).
-                    startIndex = emitDirectivePrologues(ctor.body.statements, /*startWithNewLine*/ true);
-                    emitDetachedCommentsAndUpdateCommentsInfo(ctor.body.statements);
-                }
-                emitCaptureThisForNodeIfNecessary(node);
-                var superCall;
-                if (ctor) {
-                    emitDefaultValueAssignments(ctor);
-                    emitRestParameter(ctor);
-                    if (baseTypeElement) {
-                        superCall = getSuperCallAtGivenIndex(ctor, startIndex);
-                        if (superCall) {
-                            writeLine();
-                            emit(superCall);
-                        }
-                    }
-                    emitParameterPropertyAssignments(ctor);
-                }
-                else {
-                    if (baseTypeElement) {
-                        writeLine();
-                        emitStart(baseTypeElement);
-                        if (languageVersion < 2 /* ES6 */) {
-                            write("_super.apply(this, arguments);");
-                        }
-                        else {
-                            write("super(...args);");
-                        }
-                        emitEnd(baseTypeElement);
-                    }
-                }
-                emitPropertyDeclarations(node, getInitializedProperties(node, /*isStatic*/ false));
-                if (ctor) {
-                    var statements = ctor.body.statements;
-                    if (superCall) {
-                        statements = statements.slice(1);
-                    }
-                    emitLinesStartingAt(statements, startIndex);
-                }
-                emitTempDeclarations(/*newLine*/ true);
-                writeLine();
-                if (ctor) {
-                    emitLeadingCommentsOfPosition(ctor.body.statements.end);
-                }
-                decreaseIndent();
-                emitToken(16 /* CloseBraceToken */, ctor ? ctor.body.statements.end : node.members.end);
-                emitEnd(ctor || node);
-                if (ctor) {
-                    emitTrailingComments(ctor);
-                }
-            }
-            function emitClassExpression(node) {
-                return emitClassLikeDeclaration(node);
-            }
-            function emitClassDeclaration(node) {
-                return emitClassLikeDeclaration(node);
-            }
-            function emitClassLikeDeclaration(node) {
-                if (languageVersion < 2 /* ES6 */) {
-                    emitClassLikeDeclarationBelowES6(node);
-                }
-                else {
-                    emitClassLikeDeclarationForES6AndHigher(node);
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile && node.name) {
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            function emitClassLikeDeclarationForES6AndHigher(node) {
-                var decoratedClassAlias;
-                var isHoistedDeclarationInSystemModule = shouldHoistDeclarationInSystemJsModule(node);
-                var isDecorated = ts.nodeIsDecorated(node);
-                var rewriteAsClassExpression = isDecorated || isHoistedDeclarationInSystemModule;
-                if (node.kind === 221 /* ClassDeclaration */) {
-                    if (rewriteAsClassExpression) {
-                        // When we emit an ES6 class that has a class decorator, we must tailor the
-                        // emit to certain specific cases.
-                        //
-                        // In the simplest case, we emit the class declaration as a let declaration, and
-                        // evaluate decorators after the close of the class body:
-                        //
-                        //  TypeScript                      | Javascript
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | let C = class C {
-                        //  class C {                       | }
-                        //  }                               | C = __decorate([dec], C);
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | export let C = class C {
-                        //  export class C {                | }
-                        //  }                               | C = __decorate([dec], C);
-                        //  ---------------------------------------------------------------------
-                        //  [Example 1]
-                        //
-                        // If a class declaration contains a reference to itself *inside* of the class body,
-                        // this introduces two bindings to the class: One outside of the class body, and one
-                        // inside of the class body. If we apply decorators as in [Example 1] above, there
-                        // is the possibility that the decorator `dec` will return a new value for the
-                        // constructor, which would result in the binding inside of the class no longer
-                        // pointing to the same reference as the binding outside of the class.
-                        //
-                        // As a result, we must instead rewrite all references to the class *inside* of the
-                        // class body to instead point to a local temporary alias for the class:
-                        //
-                        //  TypeScript                      | Javascript
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | let C_1;
-                        //  class C {                       | let C = C_1 = class C {
-                        //    static x() { return C.y; }    |   static x() { return C_1.y; }
-                        //    static y = 1;                 | }
-                        //  }                               | C.y = 1;
-                        //                                  | C = C_1 = __decorate([dec], C);
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | let C_1;
-                        //  export class C {                | export let C = C_1 = class C {
-                        //    static x() { return C.y; }    |   static x() { return C_1.y; }
-                        //    static y = 1;                 | }
-                        //  }                               | C.y = 1;
-                        //                                  | C = C_1 = __decorate([dec], C);
-                        //  ---------------------------------------------------------------------
-                        //  [Example 2]
-                        //
-                        // If a class declaration is the default export of a module, we instead emit
-                        // the export after the decorated declaration:
-                        //
-                        //  TypeScript                      | Javascript
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | let default_1 = class {
-                        //  export default class {          | }
-                        //  }                               | default_1 = __decorate([dec], default_1);
-                        //                                  | export default default_1;
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | let C = class C {
-                        //  export default class {          | }
-                        //  }                               | C = __decorate([dec], C);
-                        //                                  | export default C;
-                        //  ---------------------------------------------------------------------
-                        //  [Example 3]
-                        //
-                        // If the class declaration is the default export and a reference to itself
-                        // inside of the class body, we must emit both an alias for the class *and*
-                        // move the export after the declaration:
-                        //
-                        //  TypeScript                      | Javascript
-                        //  --------------------------------|------------------------------------
-                        //  @dec                            | let C_1;
-                        //  export default class C {        | let C = C_1 = class C {
-                        //    static x() { return C.y; }    |   static x() { return C_1.y; }
-                        //    static y = 1;                 | }
-                        //  }                               | C.y = 1;
-                        //                                  | C = C_1 = __decorate([dec], C);
-                        //                                  | export default C;
-                        //  ---------------------------------------------------------------------
-                        //  [Example 4]
-                        //
-                        // NOTE: we reuse the same rewriting logic for cases when targeting ES6 and module kind is System.
-                        // Because of hoisting top level class declaration need to be emitted as class expressions. 
-                        // Double bind case is only required if node is decorated.
-                        if (isDecorated && resolver.getNodeCheckFlags(node) & 524288 /* ClassWithBodyScopedClassBinding */) {
-                            decoratedClassAlias = ts.unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default"));
-                            decoratedClassAliases[ts.getNodeId(node)] = decoratedClassAlias;
-                            write("let " + decoratedClassAlias + ";");
-                            writeLine();
-                        }
-                        if (isES6ExportedDeclaration(node) && !(node.flags & 512 /* Default */)) {
-                            write("export ");
-                        }
-                        if (!isHoistedDeclarationInSystemModule) {
-                            write("let ");
-                        }
-                        emitDeclarationName(node);
-                        if (decoratedClassAlias !== undefined) {
-                            write(" = " + decoratedClassAlias);
-                        }
-                        write(" = ");
-                    }
-                    else if (isES6ExportedDeclaration(node)) {
-                        write("export ");
-                        if (node.flags & 512 /* Default */) {
-                            write("default ");
-                        }
-                    }
-                }
-                // If the class has static properties, and it's a class expression, then we'll need
-                // to specialize the emit a bit.  for a class expression of the form:
-                //
-                //      class C { static a = 1; static b = 2; ... }
-                //
-                // We'll emit:
-                //
-                //      (_temp = class C { ... }, _temp.a = 1, _temp.b = 2, _temp)
-                //
-                // This keeps the expression as an expression, while ensuring that the static parts
-                // of it have been initialized by the time it is used.
-                var staticProperties = getInitializedProperties(node, /*isStatic*/ true);
-                var isClassExpressionWithStaticProperties = staticProperties.length > 0 && node.kind === 192 /* ClassExpression */;
-                var tempVariable;
-                if (isClassExpressionWithStaticProperties) {
-                    tempVariable = createAndRecordTempVariable(0 /* Auto */);
-                    write("(");
-                    increaseIndent();
-                    emit(tempVariable);
-                    write(" = ");
-                }
-                write("class");
-                // emit name if
-                // - node has a name
-                // - this is default export with static initializers
-                if (node.name || (node.flags & 512 /* Default */ && (staticProperties.length > 0 || modulekind !== ts.ModuleKind.ES6) && !rewriteAsClassExpression)) {
-                    write(" ");
-                    emitDeclarationName(node);
-                }
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-                if (baseTypeNode) {
-                    write(" extends ");
-                    emit(baseTypeNode.expression);
-                }
-                write(" {");
-                increaseIndent();
-                writeLine();
-                emitConstructor(node, baseTypeNode);
-                emitMemberFunctionsForES6AndHigher(node);
-                decreaseIndent();
-                writeLine();
-                emitToken(16 /* CloseBraceToken */, node.members.end);
-                if (rewriteAsClassExpression) {
-                    decoratedClassAliases[ts.getNodeId(node)] = undefined;
-                    write(";");
-                }
-                // Emit static property assignment. Because classDeclaration is lexically evaluated,
-                // it is safe to emit static property assignment after classDeclaration
-                // From ES6 specification:
-                //      HasLexicalDeclaration (N) : Determines if the argument identifier has a binding in this environment record that was created using
-                //                                  a lexical declaration such as a LexicalDeclaration or a ClassDeclaration.
-                if (isClassExpressionWithStaticProperties) {
-                    for (var _a = 0, staticProperties_1 = staticProperties; _a < staticProperties_1.length; _a++) {
-                        var property = staticProperties_1[_a];
-                        write(",");
-                        writeLine();
-                        emitPropertyDeclaration(node, property, /*receiver*/ tempVariable, /*isExpression*/ true);
-                    }
-                    write(",");
-                    writeLine();
-                    emit(tempVariable);
-                    decreaseIndent();
-                    write(")");
-                }
-                else {
-                    writeLine();
-                    emitPropertyDeclarations(node, staticProperties);
-                    emitDecoratorsOfClass(node, decoratedClassAlias);
-                }
-                if (!(node.flags & 1 /* Export */)) {
-                    return;
-                }
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    emitExportMemberAssignment(node);
-                }
-                else {
-                    // If this is an exported class, but not on the top level (i.e. on an internal
-                    // module), export it
-                    if (node.flags & 512 /* Default */) {
-                        // if this is a top level default export of decorated class, write the export after the declaration.
-                        if (isDecorated) {
-                            writeLine();
-                            write("export default ");
-                            emitDeclarationName(node);
-                            write(";");
-                        }
-                    }
-                    else if (node.parent.kind !== 256 /* SourceFile */) {
-                        writeLine();
-                        emitStart(node);
-                        emitModuleMemberName(node);
-                        write(" = ");
-                        emitDeclarationName(node);
-                        emitEnd(node);
-                        write(";");
-                    }
-                }
-            }
-            function emitClassLikeDeclarationBelowES6(node) {
-                if (node.kind === 221 /* ClassDeclaration */) {
-                    // source file level classes in system modules are hoisted so 'var's for them are already defined
-                    if (!shouldHoistDeclarationInSystemJsModule(node)) {
-                        write("var ");
-                    }
-                    emitDeclarationName(node);
-                    write(" = ");
-                }
-                write("(function (");
-                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
-                if (baseTypeNode) {
-                    write("_super");
-                }
-                write(") {");
-                var saveTempFlags = tempFlags;
-                var saveTempVariables = tempVariables;
-                var saveTempParameters = tempParameters;
-                var saveComputedPropertyNamesToGeneratedNames = computedPropertyNamesToGeneratedNames;
-                var saveConvertedLoopState = convertedLoopState;
-                convertedLoopState = undefined;
-                tempFlags = 0;
-                tempVariables = undefined;
-                tempParameters = undefined;
-                computedPropertyNamesToGeneratedNames = undefined;
-                increaseIndent();
-                if (baseTypeNode) {
-                    writeLine();
-                    emitStart(baseTypeNode);
-                    write("__extends(");
-                    emitDeclarationName(node);
-                    write(", _super);");
-                    emitEnd(baseTypeNode);
-                }
-                writeLine();
-                emitConstructor(node, baseTypeNode);
-                emitMemberFunctionsForES5AndLower(node);
-                emitPropertyDeclarations(node, getInitializedProperties(node, /*isStatic*/ true));
-                writeLine();
-                emitDecoratorsOfClass(node, /*decoratedClassAlias*/ undefined);
-                writeLine();
-                emitToken(16 /* CloseBraceToken */, node.members.end, function () {
-                    write("return ");
-                    emitDeclarationName(node);
-                });
-                write(";");
-                emitTempDeclarations(/*newLine*/ true);
-                ts.Debug.assert(convertedLoopState === undefined);
-                convertedLoopState = saveConvertedLoopState;
-                tempFlags = saveTempFlags;
-                tempVariables = saveTempVariables;
-                tempParameters = saveTempParameters;
-                computedPropertyNamesToGeneratedNames = saveComputedPropertyNamesToGeneratedNames;
-                decreaseIndent();
-                writeLine();
-                emitToken(16 /* CloseBraceToken */, node.members.end);
-                emitStart(node);
-                write("(");
-                if (baseTypeNode) {
-                    emit(baseTypeNode.expression);
-                }
-                write("))");
-                if (node.kind === 221 /* ClassDeclaration */) {
-                    write(";");
-                }
-                emitEnd(node);
-                if (node.kind === 221 /* ClassDeclaration */) {
-                    emitExportMemberAssignment(node);
-                }
-            }
-            function emitClassMemberPrefix(node, member) {
-                emitDeclarationName(node);
-                if (!(member.flags & 32 /* Static */)) {
-                    write(".prototype");
-                }
-            }
-            function emitDecoratorsOfClass(node, decoratedClassAlias) {
-                emitDecoratorsOfMembers(node, /*staticFlag*/ 0);
-                emitDecoratorsOfMembers(node, 32 /* Static */);
-                emitDecoratorsOfConstructor(node, decoratedClassAlias);
-            }
-            function emitDecoratorsOfConstructor(node, decoratedClassAlias) {
-                var decorators = node.decorators;
-                var constructor = ts.getFirstConstructorWithBody(node);
-                var firstParameterDecorator = constructor && ts.forEach(constructor.parameters, function (parameter) { return parameter.decorators; });
-                // skip decoration of the constructor if neither it nor its parameters are decorated
-                if (!decorators && !firstParameterDecorator) {
-                    return;
-                }
-                // Emit the call to __decorate. Given the class:
-                //
-                //   @dec
-                //   class C {
-                //   }
-                //
-                // The emit for the class is:
-                //
-                //   C = __decorate([dec], C);
-                //
-                writeLine();
-                emitStart(node.decorators || firstParameterDecorator);
-                emitDeclarationName(node);
-                if (decoratedClassAlias !== undefined) {
-                    write(" = " + decoratedClassAlias);
-                }
-                write(" = __decorate([");
-                increaseIndent();
-                writeLine();
-                var decoratorCount = decorators ? decorators.length : 0;
-                var argumentsWritten = emitList(decorators, 0, decoratorCount, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ false, /*noTrailingNewLine*/ true, function (decorator) { return emit(decorator.expression); });
-                if (firstParameterDecorator) {
-                    argumentsWritten += emitDecoratorsOfParameters(constructor, /*leadingComma*/ argumentsWritten > 0);
-                }
-                emitSerializedTypeMetadata(node, /*leadingComma*/ argumentsWritten >= 0);
-                decreaseIndent();
-                writeLine();
-                write("], ");
-                emitDeclarationName(node);
-                write(")");
-                emitEnd(node.decorators || firstParameterDecorator);
-                write(";");
-                writeLine();
-            }
-            function emitDecoratorsOfMembers(node, staticFlag) {
-                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                    var member = _b[_a];
-                    // only emit members in the correct group
-                    if ((member.flags & 32 /* Static */) !== staticFlag) {
-                        continue;
-                    }
-                    // skip members that cannot be decorated (such as the constructor)
-                    if (!ts.nodeCanBeDecorated(member)) {
-                        continue;
-                    }
-                    // skip an accessor declaration if it is not the first accessor
-                    var decorators = void 0;
-                    var functionLikeMember = void 0;
-                    if (ts.isAccessor(member)) {
-                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
-                        if (member !== accessors.firstAccessor) {
-                            continue;
-                        }
-                        // get the decorators from the first accessor with decorators
-                        decorators = accessors.firstAccessor.decorators;
-                        if (!decorators && accessors.secondAccessor) {
-                            decorators = accessors.secondAccessor.decorators;
-                        }
-                        // we only decorate parameters of the set accessor
-                        functionLikeMember = accessors.setAccessor;
-                    }
-                    else {
-                        decorators = member.decorators;
-                        // we only decorate the parameters here if this is a method
-                        if (member.kind === 147 /* MethodDeclaration */) {
-                            functionLikeMember = member;
-                        }
-                    }
-                    var firstParameterDecorator = functionLikeMember && ts.forEach(functionLikeMember.parameters, function (parameter) { return parameter.decorators; });
-                    // skip a member if it or any of its parameters are not decorated
-                    if (!decorators && !firstParameterDecorator) {
-                        continue;
-                    }
-                    // Emit the call to __decorate. Given the following:
-                    //
-                    //   class C {
-                    //     @dec method(@dec2 x) {}
-                    //     @dec get accessor() {}
-                    //     @dec prop;
-                    //   }
-                    //
-                    // The emit for a method is:
-                    //
-                    //   __decorate([
-                    //       dec,
-                    //       __param(0, dec2),
-                    //       __metadata("design:type", Function),
-                    //       __metadata("design:paramtypes", [Object]),
-                    //       __metadata("design:returntype", void 0)
-                    //   ], C.prototype, "method", undefined);
-                    //
-                    // The emit for an accessor is:
-                    //
-                    //   __decorate([
-                    //       dec
-                    //   ], C.prototype, "accessor", undefined);
-                    //
-                    // The emit for a property is:
-                    //
-                    //   __decorate([
-                    //       dec
-                    //   ], C.prototype, "prop");
-                    //
-                    writeLine();
-                    emitStart(decorators || firstParameterDecorator);
-                    write("__decorate([");
-                    increaseIndent();
-                    writeLine();
-                    var decoratorCount = decorators ? decorators.length : 0;
-                    var argumentsWritten = emitList(decorators, 0, decoratorCount, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ false, /*noTrailingNewLine*/ true, function (decorator) { return emit(decorator.expression); });
-                    if (firstParameterDecorator) {
-                        argumentsWritten += emitDecoratorsOfParameters(functionLikeMember, argumentsWritten > 0);
-                    }
-                    emitSerializedTypeMetadata(member, argumentsWritten > 0);
-                    decreaseIndent();
-                    writeLine();
-                    write("], ");
-                    emitClassMemberPrefix(node, member);
-                    write(", ");
-                    emitExpressionForPropertyName(member.name);
-                    if (languageVersion > 0 /* ES3 */) {
-                        if (member.kind !== 145 /* PropertyDeclaration */) {
-                            // We emit `null` here to indicate to `__decorate` that it can invoke `Object.getOwnPropertyDescriptor` directly.
-                            // We have this extra argument here so that we can inject an explicit property descriptor at a later date.
-                            write(", null");
-                        }
-                        else {
-                            // We emit `void 0` here to indicate to `__decorate` that it can invoke `Object.defineProperty` directly, but that it
-                            // should not invoke `Object.getOwnPropertyDescriptor`.
-                            write(", void 0");
-                        }
-                    }
-                    write(")");
-                    emitEnd(decorators || firstParameterDecorator);
-                    write(";");
-                    writeLine();
-                }
-            }
-            function emitDecoratorsOfParameters(node, leadingComma) {
-                var argumentsWritten = 0;
-                if (node) {
-                    var parameterIndex_1 = 0;
-                    for (var _a = 0, _b = node.parameters; _a < _b.length; _a++) {
-                        var parameter = _b[_a];
-                        if (ts.nodeIsDecorated(parameter)) {
-                            var decorators = parameter.decorators;
-                            argumentsWritten += emitList(decorators, 0, decorators.length, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ leadingComma, /*noTrailingNewLine*/ true, function (decorator) {
-                                write("__param(" + parameterIndex_1 + ", ");
-                                emit(decorator.expression);
-                                write(")");
-                            });
-                            leadingComma = true;
-                        }
-                        parameterIndex_1++;
-                    }
-                }
-                return argumentsWritten;
-            }
-            function shouldEmitTypeMetadata(node) {
-                // This method determines whether to emit the "design:type" metadata based on the node's kind.
-                // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata
-                // compiler option is set.
-                switch (node.kind) {
-                    case 147 /* MethodDeclaration */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 145 /* PropertyDeclaration */:
-                        return true;
-                }
-                return false;
-            }
-            function shouldEmitReturnTypeMetadata(node) {
-                // This method determines whether to emit the "design:returntype" metadata based on the node's kind.
-                // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata
-                // compiler option is set.
-                switch (node.kind) {
-                    case 147 /* MethodDeclaration */:
-                        return true;
-                }
-                return false;
-            }
-            function shouldEmitParamTypesMetadata(node) {
-                // This method determines whether to emit the "design:paramtypes" metadata based on the node's kind.
-                // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata
-                // compiler option is set.
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 150 /* SetAccessor */:
-                        return true;
-                }
-                return false;
-            }
-            /** Serializes the type of a declaration to an appropriate JS constructor value. Used by the __metadata decorator for a class member. */
-            function emitSerializedTypeOfNode(node) {
-                // serialization of the type of a declaration uses the following rules:
-                //
-                // * The serialized type of a ClassDeclaration is "Function"
-                // * The serialized type of a ParameterDeclaration is the serialized type of its type annotation.
-                // * The serialized type of a PropertyDeclaration is the serialized type of its type annotation.
-                // * The serialized type of an AccessorDeclaration is the serialized type of the return type annotation of its getter or parameter type annotation of its setter.
-                // * The serialized type of any other FunctionLikeDeclaration is "Function".
-                // * The serialized type of any other node is "void 0".
-                //
-                // For rules on serializing type annotations, see `serializeTypeNode`.
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                        write("Function");
-                        return;
-                    case 145 /* PropertyDeclaration */:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 142 /* Parameter */:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 149 /* GetAccessor */:
-                        emitSerializedTypeNode(node.type);
-                        return;
-                    case 150 /* SetAccessor */:
-                        emitSerializedTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
-                        return;
-                }
-                if (ts.isFunctionLike(node)) {
-                    write("Function");
-                    return;
-                }
-                write("void 0");
-            }
-            function emitSerializedTypeNode(node) {
-                if (node) {
-                    switch (node.kind) {
-                        case 103 /* VoidKeyword */:
-                            write("void 0");
-                            return;
-                        case 164 /* ParenthesizedType */:
-                            emitSerializedTypeNode(node.type);
-                            return;
-                        case 156 /* FunctionType */:
-                        case 157 /* ConstructorType */:
-                            write("Function");
-                            return;
-                        case 160 /* ArrayType */:
-                        case 161 /* TupleType */:
-                            write("Array");
-                            return;
-                        case 154 /* TypePredicate */:
-                        case 120 /* BooleanKeyword */:
-                            write("Boolean");
-                            return;
-                        case 132 /* StringKeyword */:
-                        case 166 /* StringLiteralType */:
-                            write("String");
-                            return;
-                        case 130 /* NumberKeyword */:
-                            write("Number");
-                            return;
-                        case 133 /* SymbolKeyword */:
-                            write("Symbol");
-                            return;
-                        case 155 /* TypeReference */:
-                            emitSerializedTypeReferenceNode(node);
-                            return;
-                        case 158 /* TypeQuery */:
-                        case 159 /* TypeLiteral */:
-                        case 162 /* UnionType */:
-                        case 163 /* IntersectionType */:
-                        case 117 /* AnyKeyword */:
-                        case 165 /* ThisType */:
-                            break;
-                        default:
-                            ts.Debug.fail("Cannot serialize unexpected type node.");
-                            break;
-                    }
-                }
-                write("Object");
-            }
-            /** Serializes a TypeReferenceNode to an appropriate JS constructor value. Used by the __metadata decorator. */
-            function emitSerializedTypeReferenceNode(node) {
-                var location = node.parent;
-                while (ts.isDeclaration(location) || ts.isTypeNode(location)) {
-                    location = location.parent;
-                }
-                // Clone the type name and parent it to a location outside of the current declaration.
-                var typeName = ts.cloneEntityName(node.typeName, location);
-                var result = resolver.getTypeReferenceSerializationKind(typeName);
-                switch (result) {
-                    case ts.TypeReferenceSerializationKind.Unknown:
-                        var temp = createAndRecordTempVariable(0 /* Auto */);
-                        write("(typeof (");
-                        emitNodeWithoutSourceMap(temp);
-                        write(" = ");
-                        emitEntityNameAsExpression(typeName, /*useFallback*/ true);
-                        write(") === 'function' && ");
-                        emitNodeWithoutSourceMap(temp);
-                        write(") || Object");
-                        break;
-                    case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
-                        emitEntityNameAsExpression(typeName, /*useFallback*/ false);
-                        break;
-                    case ts.TypeReferenceSerializationKind.VoidType:
-                        write("void 0");
-                        break;
-                    case ts.TypeReferenceSerializationKind.BooleanType:
-                        write("Boolean");
-                        break;
-                    case ts.TypeReferenceSerializationKind.NumberLikeType:
-                        write("Number");
-                        break;
-                    case ts.TypeReferenceSerializationKind.StringLikeType:
-                        write("String");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ArrayLikeType:
-                        write("Array");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ESSymbolType:
-                        if (languageVersion < 2 /* ES6 */) {
-                            write("typeof Symbol === 'function' ? Symbol : Object");
-                        }
-                        else {
-                            write("Symbol");
-                        }
-                        break;
-                    case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
-                        write("Function");
-                        break;
-                    case ts.TypeReferenceSerializationKind.ObjectType:
-                        write("Object");
-                        break;
-                }
-            }
-            /** Serializes the parameter types of a function or the constructor of a class. Used by the __metadata decorator for a method or set accessor. */
-            function emitSerializedParameterTypesOfNode(node) {
-                // serialization of parameter types uses the following rules:
-                //
-                // * If the declaration is a class, the parameters of the first constructor with a body are used.
-                // * If the declaration is function-like and has a body, the parameters of the function are used.
-                //
-                // For the rules on serializing the type of each parameter declaration, see `serializeTypeOfDeclaration`.
-                if (node) {
-                    var valueDeclaration = void 0;
-                    if (node.kind === 221 /* ClassDeclaration */) {
-                        valueDeclaration = ts.getFirstConstructorWithBody(node);
-                    }
-                    else if (ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)) {
-                        valueDeclaration = node;
-                    }
-                    if (valueDeclaration) {
-                        var parameters = valueDeclaration.parameters;
-                        var parameterCount = parameters.length;
-                        if (parameterCount > 0) {
-                            for (var i = 0; i < parameterCount; i++) {
-                                if (i > 0) {
-                                    write(", ");
-                                }
-                                if (parameters[i].dotDotDotToken) {
-                                    var parameterType = parameters[i].type;
-                                    if (parameterType.kind === 160 /* ArrayType */) {
-                                        parameterType = parameterType.elementType;
-                                    }
-                                    else if (parameterType.kind === 155 /* TypeReference */ && parameterType.typeArguments && parameterType.typeArguments.length === 1) {
-                                        parameterType = parameterType.typeArguments[0];
-                                    }
-                                    else {
-                                        parameterType = undefined;
-                                    }
-                                    emitSerializedTypeNode(parameterType);
-                                }
-                                else {
-                                    emitSerializedTypeOfNode(parameters[i]);
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            /** Serializes the return type of function. Used by the __metadata decorator for a method. */
-            function emitSerializedReturnTypeOfNode(node) {
-                if (node && ts.isFunctionLike(node) && node.type) {
-                    emitSerializedTypeNode(node.type);
-                    return;
-                }
-                write("void 0");
-            }
-            function emitSerializedTypeMetadata(node, writeComma) {
-                // This method emits the serialized type metadata for a decorator target.
-                // The caller should have already tested whether the node has decorators.
-                var argumentsWritten = 0;
-                if (compilerOptions.emitDecoratorMetadata) {
-                    if (shouldEmitTypeMetadata(node)) {
-                        if (writeComma) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:type', ");
-                        emitSerializedTypeOfNode(node);
-                        write(")");
-                        argumentsWritten++;
-                    }
-                    if (shouldEmitParamTypesMetadata(node)) {
-                        if (writeComma || argumentsWritten) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:paramtypes', [");
-                        emitSerializedParameterTypesOfNode(node);
-                        write("])");
-                        argumentsWritten++;
-                    }
-                    if (shouldEmitReturnTypeMetadata(node)) {
-                        if (writeComma || argumentsWritten) {
-                            write(", ");
-                        }
-                        writeLine();
-                        write("__metadata('design:returntype', ");
-                        emitSerializedReturnTypeOfNode(node);
-                        write(")");
-                        argumentsWritten++;
-                    }
-                }
-                return argumentsWritten;
-            }
-            function emitInterfaceDeclaration(node) {
-                emitCommentsOnNotEmittedNode(node);
-            }
-            function shouldEmitEnumDeclaration(node) {
-                var isConstEnum = ts.isConst(node);
-                return !isConstEnum || compilerOptions.preserveConstEnums || compilerOptions.isolatedModules;
-            }
-            function emitEnumDeclaration(node) {
-                // const enums are completely erased during compilation.
-                if (!shouldEmitEnumDeclaration(node)) {
-                    return;
-                }
-                if (!shouldHoistDeclarationInSystemJsModule(node)) {
-                    // do not emit var if variable was already hoisted
-                    var isES6ExportedEnum = isES6ExportedDeclaration(node);
-                    if (!(node.flags & 1 /* Export */) || (isES6ExportedEnum && isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 224 /* EnumDeclaration */))) {
-                        emitStart(node);
-                        if (isES6ExportedEnum) {
-                            write("export ");
-                        }
-                        write("var ");
-                        emit(node.name);
-                        emitEnd(node);
-                        write(";");
-                    }
-                }
-                writeLine();
-                emitStart(node);
-                write("(function (");
-                emitStart(node.name);
-                write(getGeneratedNameForNode(node));
-                emitEnd(node.name);
-                write(") {");
-                increaseIndent();
-                emitLines(node.members);
-                decreaseIndent();
-                writeLine();
-                emitToken(16 /* CloseBraceToken */, node.members.end);
-                write(")(");
-                emitModuleMemberName(node);
-                write(" || (");
-                emitModuleMemberName(node);
-                write(" = {}));");
-                emitEnd(node);
-                if (!isES6ExportedDeclaration(node) && node.flags & 1 /* Export */ && !shouldHoistDeclarationInSystemJsModule(node)) {
-                    // do not emit var if variable was already hoisted
-                    writeLine();
-                    emitStart(node);
-                    write("var ");
-                    emit(node.name);
-                    write(" = ");
-                    emitModuleMemberName(node);
-                    emitEnd(node);
-                    write(";");
-                }
-                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
-                    if (modulekind === ts.ModuleKind.System && (node.flags & 1 /* Export */)) {
-                        // write the call to exporter for enum
-                        writeLine();
-                        write(exportFunctionForFile + "(\"");
-                        emitDeclarationName(node);
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(");");
-                    }
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            function emitEnumMember(node) {
-                var enumParent = node.parent;
-                emitStart(node);
-                write(getGeneratedNameForNode(enumParent));
-                write("[");
-                write(getGeneratedNameForNode(enumParent));
-                write("[");
-                emitExpressionForPropertyName(node.name);
-                write("] = ");
-                writeEnumMemberDeclarationValue(node);
-                write("] = ");
-                emitExpressionForPropertyName(node.name);
-                emitEnd(node);
-                write(";");
-            }
-            function writeEnumMemberDeclarationValue(member) {
-                var value = resolver.getConstantValue(member);
-                if (value !== undefined) {
-                    write(value.toString());
-                    return;
-                }
-                else if (member.initializer) {
-                    emit(member.initializer);
-                }
-                else {
-                    write("undefined");
-                }
-            }
-            function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
-                if (moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) {
-                    var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
-                    return recursiveInnerModule || moduleDeclaration.body;
-                }
-            }
-            function shouldEmitModuleDeclaration(node) {
-                return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules);
-            }
-            function isModuleMergedWithES6Class(node) {
-                return languageVersion === 2 /* ES6 */ && !!(resolver.getNodeCheckFlags(node) & 32768 /* LexicalModuleMergesWithClass */);
-            }
-            function isFirstDeclarationOfKind(node, declarations, kind) {
-                return !ts.forEach(declarations, function (declaration) { return declaration.kind === kind && declaration.pos < node.pos; });
-            }
-            function emitModuleDeclaration(node) {
-                // Emit only if this module is non-ambient.
-                var shouldEmit = shouldEmitModuleDeclaration(node);
-                if (!shouldEmit) {
-                    return emitCommentsOnNotEmittedNode(node);
-                }
-                var hoistedInDeclarationScope = shouldHoistDeclarationInSystemJsModule(node);
-                var emitVarForModule = !hoistedInDeclarationScope && !isModuleMergedWithES6Class(node);
-                if (emitVarForModule) {
-                    var isES6ExportedNamespace = isES6ExportedDeclaration(node);
-                    if (!isES6ExportedNamespace || isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 225 /* ModuleDeclaration */)) {
-                        emitStart(node);
-                        if (isES6ExportedNamespace) {
-                            write("export ");
-                        }
-                        write("var ");
-                        emit(node.name);
-                        write(";");
-                        emitEnd(node);
-                        writeLine();
-                    }
-                }
-                emitStart(node);
-                write("(function (");
-                emitStart(node.name);
-                write(getGeneratedNameForNode(node));
-                emitEnd(node.name);
-                write(") ");
-                if (node.body.kind === 226 /* ModuleBlock */) {
-                    var saveConvertedLoopState = convertedLoopState;
-                    var saveTempFlags = tempFlags;
-                    var saveTempVariables = tempVariables;
-                    convertedLoopState = undefined;
-                    tempFlags = 0;
-                    tempVariables = undefined;
-                    emit(node.body);
-                    ts.Debug.assert(convertedLoopState === undefined);
-                    convertedLoopState = saveConvertedLoopState;
-                    tempFlags = saveTempFlags;
-                    tempVariables = saveTempVariables;
-                }
-                else {
-                    write("{");
-                    increaseIndent();
-                    emitCaptureThisForNodeIfNecessary(node);
-                    writeLine();
-                    emit(node.body);
-                    decreaseIndent();
-                    writeLine();
-                    var moduleBlock = getInnerMostModuleDeclarationFromDottedModule(node).body;
-                    emitToken(16 /* CloseBraceToken */, moduleBlock.statements.end);
-                }
-                write(")(");
-                // write moduleDecl = containingModule.m only if it is not exported es6 module member
-                if ((node.flags & 1 /* Export */) && !isES6ExportedDeclaration(node)) {
-                    emit(node.name);
-                    write(" = ");
-                }
-                emitModuleMemberName(node);
-                write(" || (");
-                emitModuleMemberName(node);
-                write(" = {}));");
-                emitEnd(node);
-                if (!isES6ExportedDeclaration(node) && node.name.kind === 69 /* Identifier */ && node.parent === currentSourceFile) {
-                    if (modulekind === ts.ModuleKind.System && (node.flags & 1 /* Export */)) {
-                        writeLine();
-                        write(exportFunctionForFile + "(\"");
-                        emitDeclarationName(node);
-                        write("\", ");
-                        emitDeclarationName(node);
-                        write(");");
-                    }
-                    emitExportMemberAssignments(node.name);
-                }
-            }
-            /*
-             * Some bundlers (SystemJS builder) sometimes want to rename dependencies.
-             * Here we check if alternative name was provided for a given moduleName and return it if possible.
-             */
-            function tryRenameExternalModule(moduleName) {
-                if (renamedDependencies && ts.hasProperty(renamedDependencies, moduleName.text)) {
-                    return "\"" + renamedDependencies[moduleName.text] + "\"";
-                }
-                return undefined;
-            }
-            function emitRequire(moduleName) {
-                if (moduleName.kind === 9 /* StringLiteral */) {
-                    write("require(");
-                    var text = tryRenameExternalModule(moduleName);
-                    if (text) {
-                        write(text);
-                    }
-                    else {
-                        emitStart(moduleName);
-                        emitLiteral(moduleName);
-                        emitEnd(moduleName);
-                    }
-                    emitToken(18 /* CloseParenToken */, moduleName.end);
-                }
-                else {
-                    write("require()");
-                }
-            }
-            function getNamespaceDeclarationNode(node) {
-                if (node.kind === 229 /* ImportEqualsDeclaration */) {
-                    return node;
-                }
-                var importClause = node.importClause;
-                if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                    return importClause.namedBindings;
-                }
-            }
-            function isDefaultImport(node) {
-                return node.kind === 230 /* ImportDeclaration */ && node.importClause && !!node.importClause.name;
-            }
-            function emitExportImportAssignments(node) {
-                if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
-                    emitExportMemberAssignments(node.name);
-                }
-                ts.forEachChild(node, emitExportImportAssignments);
-            }
-            function emitImportDeclaration(node) {
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    return emitExternalImportDeclaration(node);
-                }
-                // ES6 import
-                if (node.importClause) {
-                    var shouldEmitDefaultBindings = resolver.isReferencedAliasDeclaration(node.importClause);
-                    var shouldEmitNamedBindings = node.importClause.namedBindings && resolver.isReferencedAliasDeclaration(node.importClause.namedBindings, /* checkChildren */ true);
-                    if (shouldEmitDefaultBindings || shouldEmitNamedBindings) {
-                        write("import ");
-                        emitStart(node.importClause);
-                        if (shouldEmitDefaultBindings) {
-                            emit(node.importClause.name);
-                            if (shouldEmitNamedBindings) {
-                                write(", ");
-                            }
-                        }
-                        if (shouldEmitNamedBindings) {
-                            emitLeadingComments(node.importClause.namedBindings);
-                            emitStart(node.importClause.namedBindings);
-                            if (node.importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                                write("* as ");
-                                emit(node.importClause.namedBindings.name);
-                            }
-                            else {
-                                write("{ ");
-                                emitExportOrImportSpecifierList(node.importClause.namedBindings.elements, resolver.isReferencedAliasDeclaration);
-                                write(" }");
-                            }
-                            emitEnd(node.importClause.namedBindings);
-                            emitTrailingComments(node.importClause.namedBindings);
-                        }
-                        emitEnd(node.importClause);
-                        write(" from ");
-                        emit(node.moduleSpecifier);
-                        write(";");
-                    }
-                }
-                else {
-                    write("import ");
-                    emit(node.moduleSpecifier);
-                    write(";");
-                }
-            }
-            function emitExternalImportDeclaration(node) {
-                if (ts.contains(externalImports, node)) {
-                    var isExportedImport = node.kind === 229 /* ImportEqualsDeclaration */ && (node.flags & 1 /* Export */) !== 0;
-                    var namespaceDeclaration = getNamespaceDeclarationNode(node);
-                    var varOrConst = (languageVersion <= 1 /* ES5 */) ? "var " : "const ";
-                    if (modulekind !== ts.ModuleKind.AMD) {
-                        emitLeadingComments(node);
-                        emitStart(node);
-                        if (namespaceDeclaration && !isDefaultImport(node)) {
-                            // import x = require("foo")
-                            // import * as x from "foo"
-                            if (!isExportedImport) {
-                                write(varOrConst);
-                            }
-                            ;
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                        }
-                        else {
-                            // import "foo"
-                            // import x from "foo"
-                            // import { x, y } from "foo"
-                            // import d, * as x from "foo"
-                            // import d, { x, y } from "foo"
-                            var isNakedImport = 230 /* ImportDeclaration */ && !node.importClause;
-                            if (!isNakedImport) {
-                                write(varOrConst);
-                                write(getGeneratedNameForNode(node));
-                                write(" = ");
-                            }
-                        }
-                        emitRequire(ts.getExternalModuleName(node));
-                        if (namespaceDeclaration && isDefaultImport(node)) {
-                            // import d, * as x from "foo"
-                            write(", ");
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            write(getGeneratedNameForNode(node));
-                        }
-                        write(";");
-                        emitEnd(node);
-                        emitExportImportAssignments(node);
-                        emitTrailingComments(node);
-                    }
-                    else {
-                        if (isExportedImport) {
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            emit(namespaceDeclaration.name);
-                            write(";");
-                        }
-                        else if (namespaceDeclaration && isDefaultImport(node)) {
-                            // import d, * as x from "foo"
-                            write(varOrConst);
-                            emitModuleMemberName(namespaceDeclaration);
-                            write(" = ");
-                            write(getGeneratedNameForNode(node));
-                            write(";");
-                        }
-                        emitExportImportAssignments(node);
-                    }
-                }
-            }
-            function emitImportEqualsDeclaration(node) {
-                if (ts.isExternalModuleImportEqualsDeclaration(node)) {
-                    emitExternalImportDeclaration(node);
-                    return;
-                }
-                // preserve old compiler's behavior: emit 'var' for import declaration (even if we do not consider them referenced) when
-                // - current file is not external module
-                // - import declaration is top level and target is value imported by entity name
-                if (resolver.isReferencedAliasDeclaration(node) ||
-                    (!isCurrentFileExternalModule && resolver.isTopLevelValueImportEqualsWithEntityName(node))) {
-                    emitLeadingComments(node);
-                    emitStart(node);
-                    // variable declaration for import-equals declaration can be hoisted in system modules
-                    // in this case 'var' should be omitted and emit should contain only initialization
-                    var variableDeclarationIsHoisted = shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ true);
-                    // is it top level export import v = a.b.c in system module?
-                    // if yes - it needs to be rewritten as exporter('v', v = a.b.c)
-                    var isExported = isSourceFileLevelDeclarationInSystemJsModule(node, /*isExported*/ true);
-                    if (!variableDeclarationIsHoisted) {
-                        ts.Debug.assert(!isExported);
-                        if (isES6ExportedDeclaration(node)) {
-                            write("export ");
-                            write("var ");
-                        }
-                        else if (!(node.flags & 1 /* Export */)) {
-                            write("var ");
-                        }
-                    }
-                    if (isExported) {
-                        write(exportFunctionForFile + "(\"");
-                        emitNodeWithoutSourceMap(node.name);
-                        write("\", ");
-                    }
-                    emitModuleMemberName(node);
-                    write(" = ");
-                    emit(node.moduleReference);
-                    if (isExported) {
-                        write(")");
-                    }
-                    write(";");
-                    emitEnd(node);
-                    emitExportImportAssignments(node);
-                    emitTrailingComments(node);
-                }
-            }
-            function emitExportDeclaration(node) {
-                ts.Debug.assert(modulekind !== ts.ModuleKind.System);
-                if (modulekind !== ts.ModuleKind.ES6) {
-                    if (node.moduleSpecifier && (!node.exportClause || resolver.isValueAliasDeclaration(node))) {
-                        emitStart(node);
-                        var generatedName = getGeneratedNameForNode(node);
-                        if (node.exportClause) {
-                            // export { x, y, ... } from "foo"
-                            if (modulekind !== ts.ModuleKind.AMD) {
-                                write("var ");
-                                write(generatedName);
-                                write(" = ");
-                                emitRequire(ts.getExternalModuleName(node));
-                                write(";");
-                            }
-                            for (var _a = 0, _b = node.exportClause.elements; _a < _b.length; _a++) {
-                                var specifier = _b[_a];
-                                if (resolver.isValueAliasDeclaration(specifier)) {
-                                    writeLine();
-                                    emitStart(specifier);
-                                    emitContainingModuleName(specifier);
-                                    write(".");
-                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
-                                    write(" = ");
-                                    write(generatedName);
-                                    write(".");
-                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.propertyName || specifier.name);
-                                    write(";");
-                                    emitEnd(specifier);
-                                }
-                            }
-                        }
-                        else {
-                            // export * from "foo"
-                            if (hasExportStarsToExportValues && resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
-                                writeLine();
-                                write("__export(");
-                                if (modulekind !== ts.ModuleKind.AMD) {
-                                    emitRequire(ts.getExternalModuleName(node));
-                                }
-                                else {
-                                    write(generatedName);
-                                }
-                                write(");");
-                            }
-                        }
-                        emitEnd(node);
-                    }
-                }
-                else {
-                    if (!node.exportClause || resolver.isValueAliasDeclaration(node)) {
-                        write("export ");
-                        if (node.exportClause) {
-                            // export { x, y, ... }
-                            write("{ ");
-                            emitExportOrImportSpecifierList(node.exportClause.elements, resolver.isValueAliasDeclaration);
-                            write(" }");
-                        }
-                        else {
-                            write("*");
-                        }
-                        if (node.moduleSpecifier) {
-                            write(" from ");
-                            emit(node.moduleSpecifier);
-                        }
-                        write(";");
-                    }
-                }
-            }
-            function emitExportOrImportSpecifierList(specifiers, shouldEmit) {
-                ts.Debug.assert(modulekind === ts.ModuleKind.ES6);
-                var needsComma = false;
-                for (var _a = 0, specifiers_1 = specifiers; _a < specifiers_1.length; _a++) {
-                    var specifier = specifiers_1[_a];
-                    if (shouldEmit(specifier)) {
-                        if (needsComma) {
-                            write(", ");
-                        }
-                        if (specifier.propertyName) {
-                            emit(specifier.propertyName);
-                            write(" as ");
-                        }
-                        emit(specifier.name);
-                        needsComma = true;
-                    }
-                }
-            }
-            function emitExportAssignment(node) {
-                if (!node.isExportEquals && resolver.isValueAliasDeclaration(node)) {
-                    if (modulekind === ts.ModuleKind.ES6) {
-                        writeLine();
-                        emitStart(node);
-                        write("export default ");
-                        var expression = node.expression;
-                        emit(expression);
-                        if (expression.kind !== 220 /* FunctionDeclaration */ &&
-                            expression.kind !== 221 /* ClassDeclaration */) {
-                            write(";");
-                        }
-                        emitEnd(node);
-                    }
-                    else {
-                        writeLine();
-                        emitStart(node);
-                        if (modulekind === ts.ModuleKind.System) {
-                            write(exportFunctionForFile + "(\"default\",");
-                            emit(node.expression);
-                            write(")");
-                        }
-                        else {
-                            emitEs6ExportDefaultCompat(node);
-                            emitContainingModuleName(node);
-                            if (languageVersion === 0 /* ES3 */) {
-                                write('["default"] = ');
-                            }
-                            else {
-                                write(".default = ");
-                            }
-                            emit(node.expression);
-                        }
-                        write(";");
-                        emitEnd(node);
-                    }
-                }
-            }
-            function collectExternalModuleInfo(sourceFile) {
-                externalImports = [];
-                exportSpecifiers = {};
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                for (var _a = 0, _b = sourceFile.statements; _a < _b.length; _a++) {
-                    var node = _b[_a];
-                    switch (node.kind) {
-                        case 230 /* ImportDeclaration */:
-                            if (!node.importClause ||
-                                resolver.isReferencedAliasDeclaration(node.importClause, /*checkChildren*/ true)) {
-                                // import "mod"
-                                // import x from "mod" where x is referenced
-                                // import * as x from "mod" where x is referenced
-                                // import { x, y } from "mod" where at least one import is referenced
-                                externalImports.push(node);
-                            }
-                            break;
-                        case 229 /* ImportEqualsDeclaration */:
-                            if (node.moduleReference.kind === 240 /* ExternalModuleReference */ && resolver.isReferencedAliasDeclaration(node)) {
-                                // import x = require("mod") where x is referenced
-                                externalImports.push(node);
-                            }
-                            break;
-                        case 236 /* ExportDeclaration */:
-                            if (node.moduleSpecifier) {
-                                if (!node.exportClause) {
-                                    // export * from "mod"
-                                    if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
-                                        externalImports.push(node);
-                                        hasExportStarsToExportValues = true;
-                                    }
-                                }
-                                else if (resolver.isValueAliasDeclaration(node)) {
-                                    // export { x, y } from "mod" where at least one export is a value symbol
-                                    externalImports.push(node);
-                                }
-                            }
-                            else {
-                                // export { x, y }
-                                for (var _c = 0, _d = node.exportClause.elements; _c < _d.length; _c++) {
-                                    var specifier = _d[_c];
-                                    var name_29 = (specifier.propertyName || specifier.name).text;
-                                    (exportSpecifiers[name_29] || (exportSpecifiers[name_29] = [])).push(specifier);
-                                }
-                            }
-                            break;
-                        case 235 /* ExportAssignment */:
-                            if (node.isExportEquals && !exportEquals) {
-                                // export = x
-                                exportEquals = node;
-                            }
-                            break;
-                    }
-                }
-            }
-            function emitExportStarHelper() {
-                if (hasExportStarsToExportValues) {
-                    writeLine();
-                    write("function __export(m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                }
-            }
-            function getLocalNameForExternalImport(node) {
-                var namespaceDeclaration = getNamespaceDeclarationNode(node);
-                if (namespaceDeclaration && !isDefaultImport(node)) {
-                    return ts.getTextOfNodeFromSourceText(currentText, namespaceDeclaration.name);
-                }
-                if (node.kind === 230 /* ImportDeclaration */ && node.importClause) {
-                    return getGeneratedNameForNode(node);
-                }
-                if (node.kind === 236 /* ExportDeclaration */ && node.moduleSpecifier) {
-                    return getGeneratedNameForNode(node);
-                }
-            }
-            function getExternalModuleNameText(importNode, emitRelativePathAsModuleName) {
-                if (emitRelativePathAsModuleName) {
-                    var name_30 = getExternalModuleNameFromDeclaration(host, resolver, importNode);
-                    if (name_30) {
-                        return "\"" + name_30 + "\"";
-                    }
-                }
-                var moduleName = ts.getExternalModuleName(importNode);
-                if (moduleName.kind === 9 /* StringLiteral */) {
-                    return tryRenameExternalModule(moduleName) || getLiteralText(moduleName);
-                }
-                return undefined;
-            }
-            function emitVariableDeclarationsForImports() {
-                if (externalImports.length === 0) {
-                    return;
-                }
-                writeLine();
-                var started = false;
-                for (var _a = 0, externalImports_1 = externalImports; _a < externalImports_1.length; _a++) {
-                    var importNode = externalImports_1[_a];
-                    // do not create variable declaration for exports and imports that lack import clause
-                    var skipNode = importNode.kind === 236 /* ExportDeclaration */ ||
-                        (importNode.kind === 230 /* ImportDeclaration */ && !importNode.importClause);
-                    if (skipNode) {
-                        continue;
-                    }
-                    if (!started) {
-                        write("var ");
-                        started = true;
-                    }
-                    else {
-                        write(", ");
-                    }
-                    write(getLocalNameForExternalImport(importNode));
-                }
-                if (started) {
-                    write(";");
-                }
-            }
-            function emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations) {
-                // when resolving exports local exported entries/indirect exported entries in the module
-                // should always win over entries with similar names that were added via star exports
-                // to support this we store names of local/indirect exported entries in a set.
-                // this set is used to filter names brought by star exports.
-                if (!hasExportStarsToExportValues) {
-                    // local names set is needed only in presence of star exports
-                    return undefined;
-                }
-                // local names set should only be added if we have anything exported
-                if (!exportedDeclarations && ts.isEmpty(exportSpecifiers)) {
-                    // no exported declarations (export var ...) or export specifiers (export {x})
-                    // check if we have any non star export declarations.
-                    var hasExportDeclarationWithExportClause = false;
-                    for (var _a = 0, externalImports_2 = externalImports; _a < externalImports_2.length; _a++) {
-                        var externalImport = externalImports_2[_a];
-                        if (externalImport.kind === 236 /* ExportDeclaration */ && externalImport.exportClause) {
-                            hasExportDeclarationWithExportClause = true;
-                            break;
-                        }
-                    }
-                    if (!hasExportDeclarationWithExportClause) {
-                        // we still need to emit exportStar helper
-                        return emitExportStarFunction(/*localNames*/ undefined);
-                    }
-                }
-                var exportedNamesStorageRef = makeUniqueName("exportedNames");
-                writeLine();
-                write("var " + exportedNamesStorageRef + " = {");
-                increaseIndent();
-                var started = false;
-                if (exportedDeclarations) {
-                    for (var i = 0; i < exportedDeclarations.length; i++) {
-                        // write name of exported declaration, i.e 'export var x...'
-                        writeExportedName(exportedDeclarations[i]);
-                    }
-                }
-                if (exportSpecifiers) {
-                    for (var n in exportSpecifiers) {
-                        for (var _b = 0, _c = exportSpecifiers[n]; _b < _c.length; _b++) {
-                            var specifier = _c[_b];
-                            // write name of export specified, i.e. 'export {x}'
-                            writeExportedName(specifier.name);
-                        }
-                    }
-                }
-                for (var _d = 0, externalImports_3 = externalImports; _d < externalImports_3.length; _d++) {
-                    var externalImport = externalImports_3[_d];
-                    if (externalImport.kind !== 236 /* ExportDeclaration */) {
-                        continue;
-                    }
-                    var exportDecl = externalImport;
-                    if (!exportDecl.exportClause) {
-                        // export * from ...
-                        continue;
-                    }
-                    for (var _e = 0, _f = exportDecl.exportClause.elements; _e < _f.length; _e++) {
-                        var element = _f[_e];
-                        // write name of indirectly exported entry, i.e. 'export {x} from ...'
-                        writeExportedName(element.name || element.propertyName);
-                    }
-                }
-                decreaseIndent();
-                writeLine();
-                write("};");
-                return emitExportStarFunction(exportedNamesStorageRef);
-                function emitExportStarFunction(localNames) {
-                    var exportStarFunction = makeUniqueName("exportStar");
-                    writeLine();
-                    // define an export star helper function
-                    write("function " + exportStarFunction + "(m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("var exports = {};");
-                    writeLine();
-                    write("for(var n in m) {");
-                    increaseIndent();
-                    writeLine();
-                    write("if (n !== \"default\"");
-                    if (localNames) {
-                        write("&& !" + localNames + ".hasOwnProperty(n)");
-                    }
-                    write(") exports[n] = m[n];");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                    writeLine();
-                    write(exportFunctionForFile + "(exports);");
-                    decreaseIndent();
-                    writeLine();
-                    write("}");
-                    return exportStarFunction;
-                }
-                function writeExportedName(node) {
-                    // do not record default exports
-                    // they are local to module and never overwritten (explicitly skipped) by star export
-                    if (node.kind !== 69 /* Identifier */ && node.flags & 512 /* Default */) {
-                        return;
-                    }
-                    if (started) {
-                        write(",");
-                    }
-                    else {
-                        started = true;
-                    }
-                    writeLine();
-                    write("'");
-                    if (node.kind === 69 /* Identifier */) {
-                        emitNodeWithCommentsAndWithoutSourcemap(node);
-                    }
-                    else {
-                        emitDeclarationName(node);
-                    }
-                    write("': true");
-                }
-            }
-            function processTopLevelVariableAndFunctionDeclarations(node) {
-                // per ES6 spec:
-                // 15.2.1.16.4 ModuleDeclarationInstantiation() Concrete Method
-                // - var declarations are initialized to undefined - 14.a.ii
-                // - function/generator declarations are instantiated - 16.a.iv
-                // this means that after module is instantiated but before its evaluation
-                // exported functions are already accessible at import sites
-                // in theory we should hoist only exported functions and its dependencies
-                // in practice to simplify things we'll hoist all source level functions and variable declaration
-                // including variables declarations for module and class declarations
-                var hoistedVars;
-                var hoistedFunctionDeclarations;
-                var exportedDeclarations;
-                visit(node);
-                if (hoistedVars) {
-                    writeLine();
-                    write("var ");
-                    var seen = {};
-                    for (var i = 0; i < hoistedVars.length; i++) {
-                        var local = hoistedVars[i];
-                        var name_31 = local.kind === 69 /* Identifier */
-                            ? local
-                            : local.name;
-                        if (name_31) {
-                            // do not emit duplicate entries (in case of declaration merging) in the list of hoisted variables
-                            var text = ts.unescapeIdentifier(name_31.text);
-                            if (ts.hasProperty(seen, text)) {
-                                continue;
-                            }
-                            else {
-                                seen[text] = text;
-                            }
-                        }
-                        if (i !== 0) {
-                            write(", ");
-                        }
-                        if (local.kind === 221 /* ClassDeclaration */ || local.kind === 225 /* ModuleDeclaration */ || local.kind === 224 /* EnumDeclaration */) {
-                            emitDeclarationName(local);
-                        }
-                        else {
-                            emit(local);
-                        }
-                        var flags = ts.getCombinedNodeFlags(local.kind === 69 /* Identifier */ ? local.parent : local);
-                        if (flags & 1 /* Export */) {
-                            if (!exportedDeclarations) {
-                                exportedDeclarations = [];
-                            }
-                            exportedDeclarations.push(local);
-                        }
-                    }
-                    write(";");
-                }
-                if (hoistedFunctionDeclarations) {
-                    for (var _a = 0, hoistedFunctionDeclarations_1 = hoistedFunctionDeclarations; _a < hoistedFunctionDeclarations_1.length; _a++) {
-                        var f = hoistedFunctionDeclarations_1[_a];
-                        writeLine();
-                        emit(f);
-                        if (f.flags & 1 /* Export */) {
-                            if (!exportedDeclarations) {
-                                exportedDeclarations = [];
-                            }
-                            exportedDeclarations.push(f);
-                        }
-                    }
-                }
-                return exportedDeclarations;
-                function visit(node) {
-                    if (node.flags & 2 /* Ambient */) {
-                        return;
-                    }
-                    if (node.kind === 220 /* FunctionDeclaration */) {
-                        if (!hoistedFunctionDeclarations) {
-                            hoistedFunctionDeclarations = [];
-                        }
-                        hoistedFunctionDeclarations.push(node);
-                        return;
-                    }
-                    if (node.kind === 221 /* ClassDeclaration */) {
-                        if (!hoistedVars) {
-                            hoistedVars = [];
-                        }
-                        hoistedVars.push(node);
-                        return;
-                    }
-                    if (node.kind === 224 /* EnumDeclaration */) {
-                        if (shouldEmitEnumDeclaration(node)) {
-                            if (!hoistedVars) {
-                                hoistedVars = [];
-                            }
-                            hoistedVars.push(node);
-                        }
-                        return;
-                    }
-                    if (node.kind === 225 /* ModuleDeclaration */) {
-                        if (shouldEmitModuleDeclaration(node)) {
-                            if (!hoistedVars) {
-                                hoistedVars = [];
-                            }
-                            hoistedVars.push(node);
-                        }
-                        return;
-                    }
-                    if (node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) {
-                        if (shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ false)) {
-                            var name_32 = node.name;
-                            if (name_32.kind === 69 /* Identifier */) {
-                                if (!hoistedVars) {
-                                    hoistedVars = [];
-                                }
-                                hoistedVars.push(name_32);
-                            }
-                            else {
-                                ts.forEachChild(name_32, visit);
-                            }
-                        }
-                        return;
-                    }
-                    if (ts.isInternalModuleImportEqualsDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
-                        if (!hoistedVars) {
-                            hoistedVars = [];
-                        }
-                        hoistedVars.push(node.name);
-                        return;
-                    }
-                    if (ts.isBindingPattern(node)) {
-                        ts.forEach(node.elements, visit);
-                        return;
-                    }
-                    if (!ts.isDeclaration(node)) {
-                        ts.forEachChild(node, visit);
-                    }
-                }
-            }
-            function shouldHoistVariable(node, checkIfSourceFileLevelDecl) {
-                if (checkIfSourceFileLevelDecl && !shouldHoistDeclarationInSystemJsModule(node)) {
-                    return false;
-                }
-                // hoist variable if
-                // - it is not block scoped
-                // - it is top level block scoped
-                // if block scoped variables are nested in some another block then
-                // no other functions can use them except ones that are defined at least in the same block
-                return (ts.getCombinedNodeFlags(node) & 3072 /* BlockScoped */) === 0 ||
-                    ts.getEnclosingBlockScopeContainer(node).kind === 256 /* SourceFile */;
-            }
-            function isCurrentFileSystemExternalModule() {
-                return modulekind === ts.ModuleKind.System && isCurrentFileExternalModule;
-            }
-            function emitSystemModuleBody(node, dependencyGroups, startIndex) {
-                // shape of the body in system modules:
-                // function (exports) {
-                //     <list of local aliases for imports>
-                //     <hoisted function declarations>
-                //     <hoisted variable declarations>
-                //     return {
-                //         setters: [
-                //             <list of setter function for imports>
-                //         ],
-                //         execute: function() {
-                //             <module statements>
-                //         }
-                //     }
-                //     <temp declarations>
-                // }
-                // I.e:
-                // import {x} from 'file1'
-                // var y = 1;
-                // export function foo() { return y + x(); }
-                // console.log(y);
-                // will be transformed to
-                // function(exports) {
-                //     var file1; // local alias
-                //     var y;
-                //     function foo() { return y + file1.x(); }
-                //     exports("foo", foo);
-                //     return {
-                //         setters: [
-                //             function(v) { file1 = v }
-                //         ],
-                //         execute(): function() {
-                //             y = 1;
-                //             console.log(y);
-                //         }
-                //     };
-                // }
-                emitVariableDeclarationsForImports();
-                writeLine();
-                var exportedDeclarations = processTopLevelVariableAndFunctionDeclarations(node);
-                var exportStarFunction = emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations);
-                writeLine();
-                write("return {");
-                increaseIndent();
-                writeLine();
-                emitSetters(exportStarFunction, dependencyGroups);
-                writeLine();
-                emitExecute(node, startIndex);
-                decreaseIndent();
-                writeLine();
-                write("}"); // return
-                emitTempDeclarations(/*newLine*/ true);
-            }
-            function emitSetters(exportStarFunction, dependencyGroups) {
-                write("setters:[");
-                for (var i = 0; i < dependencyGroups.length; i++) {
-                    if (i !== 0) {
-                        write(",");
-                    }
-                    writeLine();
-                    increaseIndent();
-                    var group = dependencyGroups[i];
-                    // derive a unique name for parameter from the first named entry in the group
-                    var parameterName = makeUniqueName(ts.forEach(group, getLocalNameForExternalImport) || "");
-                    write("function (" + parameterName + ") {");
-                    increaseIndent();
-                    for (var _a = 0, group_1 = group; _a < group_1.length; _a++) {
-                        var entry = group_1[_a];
-                        var importVariableName = getLocalNameForExternalImport(entry) || "";
-                        switch (entry.kind) {
-                            case 230 /* ImportDeclaration */:
-                                if (!entry.importClause) {
-                                    // 'import "..."' case
-                                    // module is imported only for side-effects, no emit required
-                                    break;
-                                }
-                            // fall-through
-                            case 229 /* ImportEqualsDeclaration */:
-                                ts.Debug.assert(importVariableName !== "");
-                                writeLine();
-                                // save import into the local
-                                write(importVariableName + " = " + parameterName + ";");
-                                writeLine();
-                                break;
-                            case 236 /* ExportDeclaration */:
-                                ts.Debug.assert(importVariableName !== "");
-                                if (entry.exportClause) {
-                                    // export {a, b as c} from 'foo'
-                                    // emit as:
-                                    // exports_({
-                                    //    "a": _["a"],
-                                    //    "c": _["b"]
-                                    // });
-                                    writeLine();
-                                    write(exportFunctionForFile + "({");
-                                    writeLine();
-                                    increaseIndent();
-                                    for (var i_1 = 0, len = entry.exportClause.elements.length; i_1 < len; i_1++) {
-                                        if (i_1 !== 0) {
-                                            write(",");
-                                            writeLine();
-                                        }
-                                        var e = entry.exportClause.elements[i_1];
-                                        write("\"");
-                                        emitNodeWithCommentsAndWithoutSourcemap(e.name);
-                                        write("\": " + parameterName + "[\"");
-                                        emitNodeWithCommentsAndWithoutSourcemap(e.propertyName || e.name);
-                                        write("\"]");
-                                    }
-                                    decreaseIndent();
-                                    writeLine();
-                                    write("});");
-                                }
-                                else {
-                                    // collectExternalModuleInfo prefilters star exports to keep only ones that export values
-                                    // this means that check 'resolver.moduleExportsSomeValue' is redundant and can be omitted here
-                                    writeLine();
-                                    // export * from 'foo'
-                                    // emit as:
-                                    // exportStar(_foo);
-                                    write(exportStarFunction + "(" + parameterName + ");");
-                                }
-                                writeLine();
-                                break;
-                        }
-                    }
-                    decreaseIndent();
-                    write("}");
-                    decreaseIndent();
-                }
-                write("],");
-            }
-            function emitExecute(node, startIndex) {
-                write("execute: function() {");
-                increaseIndent();
-                writeLine();
-                for (var i = startIndex; i < node.statements.length; i++) {
-                    var statement = node.statements[i];
-                    switch (statement.kind) {
-                        // - function declarations are not emitted because they were already hoisted
-                        // - import declarations are not emitted since they are already handled in setters
-                        // - export declarations with module specifiers are not emitted since they were already written in setters
-                        // - export declarations without module specifiers are emitted preserving the order
-                        case 220 /* FunctionDeclaration */:
-                        case 230 /* ImportDeclaration */:
-                            continue;
-                        case 236 /* ExportDeclaration */:
-                            if (!statement.moduleSpecifier) {
-                                for (var _a = 0, _b = statement.exportClause.elements; _a < _b.length; _a++) {
-                                    var element = _b[_a];
-                                    // write call to exporter function for every export specifier in exports list
-                                    emitExportSpecifierInSystemModule(element);
-                                }
-                            }
-                            continue;
-                        case 229 /* ImportEqualsDeclaration */:
-                            if (!ts.isInternalModuleImportEqualsDeclaration(statement)) {
-                                // - import equals declarations that import external modules are not emitted
-                                continue;
-                            }
-                        // fall-though for import declarations that import internal modules
-                        default:
-                            writeLine();
-                            emit(statement);
-                    }
-                }
-                decreaseIndent();
-                writeLine();
-                write("}"); // execute
-            }
-            function writeModuleName(node, emitRelativePathAsModuleName) {
-                var moduleName = node.moduleName;
-                if (moduleName || (emitRelativePathAsModuleName && (moduleName = getResolvedExternalModuleName(host, node)))) {
-                    write("\"" + moduleName + "\", ");
-                }
-            }
-            function emitSystemModule(node, emitRelativePathAsModuleName) {
-                collectExternalModuleInfo(node);
-                // System modules has the following shape
-                // System.register(['dep-1', ... 'dep-n'], function(exports) {/* module body function */})
-                // 'exports' here is a function 'exports<T>(name: string, value: T): T' that is used to publish exported values.
-                // 'exports' returns its 'value' argument so in most cases expressions
-                // that mutate exported values can be rewritten as:
-                // expr -> exports('name', expr).
-                // The only exception in this rule is postfix unary operators,
-                // see comment to 'emitPostfixUnaryExpression' for more details
-                ts.Debug.assert(!exportFunctionForFile);
-                // make sure that  name of 'exports' function does not conflict with existing identifiers
-                exportFunctionForFile = makeUniqueName("exports");
-                contextObjectForFile = makeUniqueName("context");
-                writeLine();
-                write("System.register(");
-                writeModuleName(node, emitRelativePathAsModuleName);
-                write("[");
-                var groupIndices = {};
-                var dependencyGroups = [];
-                for (var i = 0; i < externalImports.length; i++) {
-                    var text = getExternalModuleNameText(externalImports[i], emitRelativePathAsModuleName);
-                    if (text === undefined) {
-                        continue;
-                    }
-                    // text should be quoted string
-                    // for deduplication purposes in key remove leading and trailing quotes so 'a' and "a" will be considered the same
-                    var key = text.substr(1, text.length - 2);
-                    if (ts.hasProperty(groupIndices, key)) {
-                        // deduplicate/group entries in dependency list by the dependency name
-                        var groupIndex = groupIndices[key];
-                        dependencyGroups[groupIndex].push(externalImports[i]);
-                        continue;
-                    }
-                    else {
-                        groupIndices[key] = dependencyGroups.length;
-                        dependencyGroups.push([externalImports[i]]);
-                    }
-                    if (i !== 0) {
-                        write(", ");
-                    }
-                    write(text);
-                }
-                write("], function(" + exportFunctionForFile + ", " + contextObjectForFile + ") {");
-                writeLine();
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
-                writeLine();
-                write("var __moduleName = " + contextObjectForFile + " && " + contextObjectForFile + ".id;");
-                writeLine();
-                emitEmitHelpers(node);
-                emitCaptureThisForNodeIfNecessary(node);
-                emitSystemModuleBody(node, dependencyGroups, startIndex);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
-                // names of modules with corresponding parameter in the factory function
-                var aliasedModuleNames = [];
-                // names of modules with no corresponding parameters in factory function
-                var unaliasedModuleNames = [];
-                var importAliasNames = []; // names of the parameters in the factory function; these
-                // parameters need to match the indexes of the corresponding
-                // module names in aliasedModuleNames.
-                // Fill in amd-dependency tags
-                for (var _a = 0, _b = node.amdDependencies; _a < _b.length; _a++) {
-                    var amdDependency = _b[_a];
-                    if (amdDependency.name) {
-                        aliasedModuleNames.push('"' + amdDependency.path + '"');
-                        importAliasNames.push(amdDependency.name);
-                    }
-                    else {
-                        unaliasedModuleNames.push('"' + amdDependency.path + '"');
-                    }
-                }
-                for (var _c = 0, externalImports_4 = externalImports; _c < externalImports_4.length; _c++) {
-                    var importNode = externalImports_4[_c];
-                    // Find the name of the external module
-                    var externalModuleName = getExternalModuleNameText(importNode, emitRelativePathAsModuleName);
-                    // Find the name of the module alias, if there is one
-                    var importAliasName = getLocalNameForExternalImport(importNode);
-                    if (includeNonAmdDependencies && importAliasName) {
-                        aliasedModuleNames.push(externalModuleName);
-                        importAliasNames.push(importAliasName);
-                    }
-                    else {
-                        unaliasedModuleNames.push(externalModuleName);
-                    }
-                }
-                return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
-            }
-            function emitAMDDependencies(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
-                // An AMD define function has the following shape:
-                //     define(id?, dependencies?, factory);
-                //
-                // This has the shape of
-                //     define(name, ["module1", "module2"], function (module1Alias) {
-                // The location of the alias in the parameter list in the factory function needs to
-                // match the position of the module name in the dependency list.
-                //
-                // To ensure this is true in cases of modules with no aliases, e.g.:
-                // `import "module"` or `<amd-dependency path= "a.css" />`
-                // we need to add modules without alias names to the end of the dependencies list
-                var dependencyNames = getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName);
-                emitAMDDependencyList(dependencyNames);
-                write(", ");
-                emitAMDFactoryHeader(dependencyNames);
-            }
-            function emitAMDDependencyList(_a) {
-                var aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames;
-                write('["require", "exports"');
-                if (aliasedModuleNames.length) {
-                    write(", ");
-                    write(aliasedModuleNames.join(", "));
-                }
-                if (unaliasedModuleNames.length) {
-                    write(", ");
-                    write(unaliasedModuleNames.join(", "));
-                }
-                write("]");
-            }
-            function emitAMDFactoryHeader(_a) {
-                var importAliasNames = _a.importAliasNames;
-                write("function (require, exports");
-                if (importAliasNames.length) {
-                    write(", ");
-                    write(importAliasNames.join(", "));
-                }
-                write(") {");
-            }
-            function emitAMDModule(node, emitRelativePathAsModuleName) {
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                writeLine();
-                write("define(");
-                writeModuleName(node, emitRelativePathAsModuleName);
-                emitAMDDependencies(node, /*includeNonAmdDependencies*/ true, emitRelativePathAsModuleName);
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(/*emitAsReturn*/ true);
-                emitTempDeclarations(/*newLine*/ true);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function emitCommonJSModule(node) {
-                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(/*emitAsReturn*/ false);
-                emitTempDeclarations(/*newLine*/ true);
-            }
-            function emitUMDModule(node) {
-                emitEmitHelpers(node);
-                collectExternalModuleInfo(node);
-                var dependencyNames = getAMDDependencyNames(node, /*includeNonAmdDependencies*/ false);
-                // Module is detected first to support Browserify users that load into a browser with an AMD loader
-                writeLines("(function (factory) {\n    if (typeof module === 'object' && typeof module.exports === 'object') {\n        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n    }\n    else if (typeof define === 'function' && define.amd) {\n        define(");
-                emitAMDDependencyList(dependencyNames);
-                write(", factory);");
-                writeLines("    }\n})(");
-                emitAMDFactoryHeader(dependencyNames);
-                increaseIndent();
-                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
-                emitExportStarHelper();
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitExportEquals(/*emitAsReturn*/ true);
-                emitTempDeclarations(/*newLine*/ true);
-                decreaseIndent();
-                writeLine();
-                write("});");
-            }
-            function emitES6Module(node) {
-                externalImports = undefined;
-                exportSpecifiers = undefined;
-                exportEquals = undefined;
-                hasExportStarsToExportValues = false;
-                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false);
-                emitEmitHelpers(node);
-                emitCaptureThisForNodeIfNecessary(node);
-                emitLinesStartingAt(node.statements, startIndex);
-                emitTempDeclarations(/*newLine*/ true);
-                // Emit exportDefault if it exists will happen as part
-                // or normal statement emit.
-            }
-            function emitExportEquals(emitAsReturn) {
-                if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) {
-                    writeLine();
-                    emitStart(exportEquals);
-                    write(emitAsReturn ? "return " : "module.exports = ");
-                    emit(exportEquals.expression);
-                    write(";");
-                    emitEnd(exportEquals);
-                }
-            }
-            function emitJsxElement(node) {
-                switch (compilerOptions.jsx) {
-                    case 2 /* React */:
-                        jsxEmitReact(node);
-                        break;
-                    case 1 /* Preserve */:
-                    // Fall back to preserve if None was specified (we'll error earlier)
-                    default:
-                        jsxEmitPreserve(node);
-                        break;
-                }
-            }
-            function trimReactWhitespaceAndApplyEntities(node) {
-                var result = undefined;
-                var text = ts.getTextOfNode(node, /*includeTrivia*/ true);
-                var firstNonWhitespace = 0;
-                var lastNonWhitespace = -1;
-                // JSX trims whitespace at the end and beginning of lines, except that the
-                // start/end of a tag is considered a start/end of a line only if that line is
-                // on the same line as the closing tag. See examples in tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx
-                for (var i = 0; i < text.length; i++) {
-                    var c = text.charCodeAt(i);
-                    if (ts.isLineBreak(c)) {
-                        if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) {
-                            var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1);
-                            result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
-                        }
-                        firstNonWhitespace = -1;
-                    }
-                    else if (!ts.isWhiteSpace(c)) {
-                        lastNonWhitespace = i;
-                        if (firstNonWhitespace === -1) {
-                            firstNonWhitespace = i;
-                        }
-                    }
-                }
-                if (firstNonWhitespace !== -1) {
-                    var part = text.substr(firstNonWhitespace);
-                    result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
-                }
-                if (result) {
-                    // Replace entities like &nbsp;
-                    result = result.replace(/&(\w+);/g, function (s, m) {
-                        if (entities[m] !== undefined) {
-                            var ch = String.fromCharCode(entities[m]);
-                            // &quot; needs to be escaped
-                            return ch === '"' ? "\\\"" : ch;
-                        }
-                        else {
-                            return s;
-                        }
-                    });
-                }
-                return result;
-            }
-            function isJsxChildEmittable(child) {
-                if (child.kind === 248 /* JsxExpression */) {
-                    // Don't emit empty expressions
-                    return !!child.expression;
-                }
-                else if (child.kind === 244 /* JsxText */) {
-                    // Don't emit empty strings
-                    return !!getTextToEmit(child);
-                }
-                return true;
-            }
-            ;
-            function getTextToEmit(node) {
-                switch (compilerOptions.jsx) {
-                    case 2 /* React */:
-                        var text = trimReactWhitespaceAndApplyEntities(node);
-                        if (text === undefined || text.length === 0) {
-                            return undefined;
-                        }
-                        else {
-                            return text;
-                        }
-                    case 1 /* Preserve */:
-                    default:
-                        return ts.getTextOfNode(node, /*includeTrivia*/ true);
-                }
-            }
-            function emitJsxText(node) {
-                switch (compilerOptions.jsx) {
-                    case 2 /* React */:
-                        write('"');
-                        write(trimReactWhitespaceAndApplyEntities(node));
-                        write('"');
-                        break;
-                    case 1 /* Preserve */:
-                    default:
-                        writer.writeLiteral(ts.getTextOfNode(node, /*includeTrivia*/ true));
-                        break;
-                }
-            }
-            function emitJsxExpression(node) {
-                if (node.expression) {
-                    switch (compilerOptions.jsx) {
-                        case 1 /* Preserve */:
-                        default:
-                            write("{");
-                            emit(node.expression);
-                            write("}");
-                            break;
-                        case 2 /* React */:
-                            emit(node.expression);
-                            break;
-                    }
-                }
-            }
-            function isUseStrictPrologue(node) {
-                return node.expression.text === "use strict";
-            }
-            function ensureUseStrictPrologue(startWithNewLine, writeUseStrict) {
-                if (writeUseStrict) {
-                    if (startWithNewLine) {
-                        writeLine();
-                    }
-                    write("\"use strict\";");
-                }
-            }
-            function emitDirectivePrologues(statements, startWithNewLine, ensureUseStrict) {
-                var foundUseStrict = false;
-                for (var i = 0; i < statements.length; i++) {
-                    if (ts.isPrologueDirective(statements[i])) {
-                        if (isUseStrictPrologue(statements[i])) {
-                            foundUseStrict = true;
-                        }
-                        if (startWithNewLine || i > 0) {
-                            writeLine();
-                        }
-                        emit(statements[i]);
-                    }
-                    else {
-                        ensureUseStrictPrologue(startWithNewLine || i > 0, !foundUseStrict && ensureUseStrict);
-                        // return index of the first non prologue directive
-                        return i;
-                    }
-                }
-                ensureUseStrictPrologue(startWithNewLine, !foundUseStrict && ensureUseStrict);
-                return statements.length;
-            }
-            function writeLines(text) {
-                var lines = text.split(/\r\n|\r|\n/g);
-                for (var i = 0; i < lines.length; i++) {
-                    var line = lines[i];
-                    if (line.length) {
-                        writeLine();
-                        write(line);
-                    }
-                }
-            }
-            function emitEmitHelpers(node) {
-                // Only emit helpers if the user did not say otherwise.
-                if (!compilerOptions.noEmitHelpers) {
-                    // Only Emit __extends function when target ES5.
-                    // For target ES6 and above, we can emit classDeclaration as is.
-                    if (languageVersion < 2 /* ES6 */ && !extendsEmitted && node.flags & 262144 /* HasClassExtends */) {
-                        writeLines(extendsHelper);
-                        extendsEmitted = true;
-                    }
-                    if (compilerOptions.jsx !== 1 /* Preserve */ && !assignEmitted && (node.flags & 1073741824 /* HasJsxSpreadAttribute */)) {
-                        writeLines(assignHelper);
-                        assignEmitted = true;
-                    }
-                    if (!decorateEmitted && node.flags & 524288 /* HasDecorators */) {
-                        writeLines(decorateHelper);
-                        if (compilerOptions.emitDecoratorMetadata) {
-                            writeLines(metadataHelper);
-                        }
-                        decorateEmitted = true;
-                    }
-                    if (!paramEmitted && node.flags & 1048576 /* HasParamDecorators */) {
-                        writeLines(paramHelper);
-                        paramEmitted = true;
-                    }
-                    if (!awaiterEmitted && node.flags & 2097152 /* HasAsyncFunctions */) {
-                        writeLines(awaiterHelper);
-                        awaiterEmitted = true;
-                    }
-                }
-            }
-            function emitSourceFileNode(node) {
-                // Start new file on new line
-                writeLine();
-                emitShebang();
-                emitDetachedCommentsAndUpdateCommentsInfo(node);
-                if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
-                    if (isOwnFileEmit || (!ts.isExternalModule(node) && compilerOptions.isolatedModules)) {
-                        var emitModule = moduleEmitDelegates[modulekind] || moduleEmitDelegates[ts.ModuleKind.CommonJS];
-                        emitModule(node);
-                    }
-                    else {
-                        bundleEmitDelegates[modulekind](node, /*emitRelativePathAsModuleName*/ true);
-                    }
-                }
-                else {
-                    // emit prologue directives prior to __extends
-                    var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false);
-                    externalImports = undefined;
-                    exportSpecifiers = undefined;
-                    exportEquals = undefined;
-                    hasExportStarsToExportValues = false;
-                    emitEmitHelpers(node);
-                    emitCaptureThisForNodeIfNecessary(node);
-                    emitLinesStartingAt(node.statements, startIndex);
-                    emitTempDeclarations(/*newLine*/ true);
-                }
-                emitLeadingComments(node.endOfFileToken);
-            }
-            function emit(node) {
-                emitNodeConsideringCommentsOption(node, emitNodeWithSourceMap);
-            }
-            function emitNodeWithCommentsAndWithoutSourcemap(node) {
-                emitNodeConsideringCommentsOption(node, emitNodeWithoutSourceMap);
-            }
-            function emitNodeConsideringCommentsOption(node, emitNodeConsideringSourcemap) {
-                if (node) {
-                    if (node.flags & 2 /* Ambient */) {
-                        return emitCommentsOnNotEmittedNode(node);
-                    }
-                    if (isSpecializedCommentHandling(node)) {
-                        // This is the node that will handle its own comments and sourcemap
-                        return emitNodeWithoutSourceMap(node);
-                    }
-                    var emitComments_1 = shouldEmitLeadingAndTrailingComments(node);
-                    if (emitComments_1) {
-                        emitLeadingComments(node);
-                    }
-                    emitNodeConsideringSourcemap(node);
-                    if (emitComments_1) {
-                        emitTrailingComments(node);
-                    }
-                }
-            }
-            function emitNodeWithSourceMap(node) {
-                if (node) {
-                    emitStart(node);
-                    emitNodeWithoutSourceMap(node);
-                    emitEnd(node);
-                }
-            }
-            function emitNodeWithoutSourceMap(node) {
-                if (node) {
-                    emitJavaScriptWorker(node);
-                }
-            }
-            function changeSourceMapEmit(writer) {
-                sourceMap = writer;
-                emitStart = writer.emitStart;
-                emitEnd = writer.emitEnd;
-                emitPos = writer.emitPos;
-                setSourceFile = writer.setSourceFile;
-            }
-            function withTemporaryNoSourceMap(callback) {
-                var prevSourceMap = sourceMap;
-                setSourceMapWriterEmit(ts.getNullSourceMapWriter());
-                callback();
-                setSourceMapWriterEmit(prevSourceMap);
-            }
-            function isSpecializedCommentHandling(node) {
-                switch (node.kind) {
-                    // All of these entities are emitted in a specialized fashion.  As such, we allow
-                    // the specialized methods for each to handle the comments on the nodes.
-                    case 222 /* InterfaceDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                    case 230 /* ImportDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 235 /* ExportAssignment */:
-                        return true;
-                }
-            }
-            function shouldEmitLeadingAndTrailingComments(node) {
-                switch (node.kind) {
-                    case 200 /* VariableStatement */:
-                        return shouldEmitLeadingAndTrailingCommentsForVariableStatement(node);
-                    case 225 /* ModuleDeclaration */:
-                        // Only emit the leading/trailing comments for a module if we're actually
-                        // emitting the module as well.
-                        return shouldEmitModuleDeclaration(node);
-                    case 224 /* EnumDeclaration */:
-                        // Only emit the leading/trailing comments for an enum if we're actually
-                        // emitting the module as well.
-                        return shouldEmitEnumDeclaration(node);
-                }
-                // If the node is emitted in specialized fashion, dont emit comments as this node will handle
-                // emitting comments when emitting itself
-                ts.Debug.assert(!isSpecializedCommentHandling(node));
-                // If this is the expression body of an arrow function that we're down-leveling,
-                // then we don't want to emit comments when we emit the body.  It will have already
-                // been taken care of when we emitted the 'return' statement for the function
-                // expression body.
-                if (node.kind !== 199 /* Block */ &&
-                    node.parent &&
-                    node.parent.kind === 180 /* ArrowFunction */ &&
-                    node.parent.body === node &&
-                    languageVersion <= 1 /* ES5 */) {
-                    return false;
-                }
-                // Emit comments for everything else.
-                return true;
-            }
-            function emitJavaScriptWorker(node) {
-                // Check if the node can be emitted regardless of the ScriptTarget
-                switch (node.kind) {
-                    case 69 /* Identifier */:
-                        return emitIdentifier(node);
-                    case 142 /* Parameter */:
-                        return emitParameter(node);
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        return emitMethod(node);
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        return emitAccessor(node);
-                    case 97 /* ThisKeyword */:
-                        return emitThis(node);
-                    case 95 /* SuperKeyword */:
-                        return emitSuper(node);
-                    case 93 /* NullKeyword */:
-                        return write("null");
-                    case 99 /* TrueKeyword */:
-                        return write("true");
-                    case 84 /* FalseKeyword */:
-                        return write("false");
-                    case 8 /* NumericLiteral */:
-                    case 9 /* StringLiteral */:
-                    case 10 /* RegularExpressionLiteral */:
-                    case 11 /* NoSubstitutionTemplateLiteral */:
-                    case 12 /* TemplateHead */:
-                    case 13 /* TemplateMiddle */:
-                    case 14 /* TemplateTail */:
-                        return emitLiteral(node);
-                    case 189 /* TemplateExpression */:
-                        return emitTemplateExpression(node);
-                    case 197 /* TemplateSpan */:
-                        return emitTemplateSpan(node);
-                    case 241 /* JsxElement */:
-                    case 242 /* JsxSelfClosingElement */:
-                        return emitJsxElement(node);
-                    case 244 /* JsxText */:
-                        return emitJsxText(node);
-                    case 248 /* JsxExpression */:
-                        return emitJsxExpression(node);
-                    case 139 /* QualifiedName */:
-                        return emitQualifiedName(node);
-                    case 167 /* ObjectBindingPattern */:
-                        return emitObjectBindingPattern(node);
-                    case 168 /* ArrayBindingPattern */:
-                        return emitArrayBindingPattern(node);
-                    case 169 /* BindingElement */:
-                        return emitBindingElement(node);
-                    case 170 /* ArrayLiteralExpression */:
-                        return emitArrayLiteral(node);
-                    case 171 /* ObjectLiteralExpression */:
-                        return emitObjectLiteral(node);
-                    case 253 /* PropertyAssignment */:
-                        return emitPropertyAssignment(node);
-                    case 254 /* ShorthandPropertyAssignment */:
-                        return emitShorthandPropertyAssignment(node);
-                    case 140 /* ComputedPropertyName */:
-                        return emitComputedPropertyName(node);
-                    case 172 /* PropertyAccessExpression */:
-                        return emitPropertyAccess(node);
-                    case 173 /* ElementAccessExpression */:
-                        return emitIndexedAccess(node);
-                    case 174 /* CallExpression */:
-                        return emitCallExpression(node);
-                    case 175 /* NewExpression */:
-                        return emitNewExpression(node);
-                    case 176 /* TaggedTemplateExpression */:
-                        return emitTaggedTemplateExpression(node);
-                    case 177 /* TypeAssertionExpression */:
-                    case 195 /* AsExpression */:
-                    case 196 /* NonNullExpression */:
-                        return emit(node.expression);
-                    case 178 /* ParenthesizedExpression */:
-                        return emitParenExpression(node);
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                        return emitFunctionDeclaration(node);
-                    case 181 /* DeleteExpression */:
-                        return emitDeleteExpression(node);
-                    case 182 /* TypeOfExpression */:
-                        return emitTypeOfExpression(node);
-                    case 183 /* VoidExpression */:
-                        return emitVoidExpression(node);
-                    case 184 /* AwaitExpression */:
-                        return emitAwaitExpression(node);
-                    case 185 /* PrefixUnaryExpression */:
-                        return emitPrefixUnaryExpression(node);
-                    case 186 /* PostfixUnaryExpression */:
-                        return emitPostfixUnaryExpression(node);
-                    case 187 /* BinaryExpression */:
-                        return emitBinaryExpression(node);
-                    case 188 /* ConditionalExpression */:
-                        return emitConditionalExpression(node);
-                    case 191 /* SpreadElementExpression */:
-                        return emitSpreadElementExpression(node);
-                    case 190 /* YieldExpression */:
-                        return emitYieldExpression(node);
-                    case 193 /* OmittedExpression */:
-                        return;
-                    case 199 /* Block */:
-                    case 226 /* ModuleBlock */:
-                        return emitBlock(node);
-                    case 200 /* VariableStatement */:
-                        return emitVariableStatement(node);
-                    case 201 /* EmptyStatement */:
-                        return write(";");
-                    case 202 /* ExpressionStatement */:
-                        return emitExpressionStatement(node);
-                    case 203 /* IfStatement */:
-                        return emitIfStatement(node);
-                    case 204 /* DoStatement */:
-                        return emitDoStatement(node);
-                    case 205 /* WhileStatement */:
-                        return emitWhileStatement(node);
-                    case 206 /* ForStatement */:
-                        return emitForStatement(node);
-                    case 208 /* ForOfStatement */:
-                    case 207 /* ForInStatement */:
-                        return emitForInOrForOfStatement(node);
-                    case 209 /* ContinueStatement */:
-                    case 210 /* BreakStatement */:
-                        return emitBreakOrContinueStatement(node);
-                    case 211 /* ReturnStatement */:
-                        return emitReturnStatement(node);
-                    case 212 /* WithStatement */:
-                        return emitWithStatement(node);
-                    case 213 /* SwitchStatement */:
-                        return emitSwitchStatement(node);
-                    case 249 /* CaseClause */:
-                    case 250 /* DefaultClause */:
-                        return emitCaseOrDefaultClause(node);
-                    case 214 /* LabeledStatement */:
-                        return emitLabeledStatement(node);
-                    case 215 /* ThrowStatement */:
-                        return emitThrowStatement(node);
-                    case 216 /* TryStatement */:
-                        return emitTryStatement(node);
-                    case 252 /* CatchClause */:
-                        return emitCatchClause(node);
-                    case 217 /* DebuggerStatement */:
-                        return emitDebuggerStatement(node);
-                    case 218 /* VariableDeclaration */:
-                        return emitVariableDeclaration(node);
-                    case 192 /* ClassExpression */:
-                        return emitClassExpression(node);
-                    case 221 /* ClassDeclaration */:
-                        return emitClassDeclaration(node);
-                    case 222 /* InterfaceDeclaration */:
-                        return emitInterfaceDeclaration(node);
-                    case 224 /* EnumDeclaration */:
-                        return emitEnumDeclaration(node);
-                    case 255 /* EnumMember */:
-                        return emitEnumMember(node);
-                    case 225 /* ModuleDeclaration */:
-                        return emitModuleDeclaration(node);
-                    case 230 /* ImportDeclaration */:
-                        return emitImportDeclaration(node);
-                    case 229 /* ImportEqualsDeclaration */:
-                        return emitImportEqualsDeclaration(node);
-                    case 236 /* ExportDeclaration */:
-                        return emitExportDeclaration(node);
-                    case 235 /* ExportAssignment */:
-                        return emitExportAssignment(node);
-                    case 256 /* SourceFile */:
-                        return emitSourceFileNode(node);
-                }
-            }
-            function hasDetachedComments(pos) {
-                return detachedCommentsInfo !== undefined && ts.lastOrUndefined(detachedCommentsInfo).nodePos === pos;
-            }
-            function getLeadingCommentsWithoutDetachedComments() {
-                // get the leading comments from detachedPos
-                var leadingComments = ts.getLeadingCommentRanges(currentText, ts.lastOrUndefined(detachedCommentsInfo).detachedCommentEndPos);
-                if (detachedCommentsInfo.length - 1) {
-                    detachedCommentsInfo.pop();
-                }
-                else {
-                    detachedCommentsInfo = undefined;
-                }
-                return leadingComments;
-            }
-            /**
-             * Determine if the given comment is a triple-slash
-             *
-             * @return true if the comment is a triple-slash comment else false
-             **/
-            function isTripleSlashComment(comment) {
-                // Verify this is /// comment, but do the regexp match only when we first can find /// in the comment text
-                // so that we don't end up computing comment string and doing match for all // comments
-                if (currentText.charCodeAt(comment.pos + 1) === 47 /* slash */ &&
-                    comment.pos + 2 < comment.end &&
-                    currentText.charCodeAt(comment.pos + 2) === 47 /* slash */) {
-                    var textSubStr = currentText.substring(comment.pos, comment.end);
-                    return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) ||
-                        textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ?
-                        true : false;
-                }
-                return false;
-            }
-            function getLeadingCommentsToEmit(node) {
-                // Emit the leading comments only if the parent's pos doesn't match because parent should take care of emitting these comments
-                if (node.parent) {
-                    if (node.parent.kind === 256 /* SourceFile */ || node.pos !== node.parent.pos) {
-                        if (hasDetachedComments(node.pos)) {
-                            // get comments without detached comments
-                            return getLeadingCommentsWithoutDetachedComments();
-                        }
-                        else {
-                            // get the leading comments from the node
-                            return ts.getLeadingCommentRangesOfNodeFromText(node, currentText);
-                        }
-                    }
-                }
-            }
-            function getTrailingCommentsToEmit(node) {
-                // Emit the trailing comments only if the parent's pos doesn't match because parent should take care of emitting these comments
-                if (node.parent) {
-                    if (node.parent.kind === 256 /* SourceFile */ || node.end !== node.parent.end) {
-                        return ts.getTrailingCommentRanges(currentText, node.end);
-                    }
-                }
-            }
-            /**
-             * Emit comments associated with node that will not be emitted into JS file
-             */
-            function emitCommentsOnNotEmittedNode(node) {
-                emitLeadingCommentsWorker(node, /*isEmittedNode*/ false);
-            }
-            function emitLeadingComments(node) {
-                return emitLeadingCommentsWorker(node, /*isEmittedNode*/ true);
-            }
-            function emitLeadingCommentsWorker(node, isEmittedNode) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var leadingComments;
-                if (isEmittedNode) {
-                    leadingComments = getLeadingCommentsToEmit(node);
-                }
-                else {
-                    // If the node will not be emitted in JS, remove all the comments(normal, pinned and ///) associated with the node,
-                    // unless it is a triple slash comment at the top of the file.
-                    // For Example:
-                    //      /// <reference-path ...>
-                    //      declare var x;
-                    //      /// <reference-path ...>
-                    //      interface F {}
-                    //  The first /// will NOT be removed while the second one will be removed even though both node will not be emitted
-                    if (node.pos === 0) {
-                        leadingComments = ts.filter(getLeadingCommentsToEmit(node), isTripleSlashComment);
-                    }
-                }
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, node, leadingComments);
-                // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
-                ts.emitComments(currentText, currentLineMap, writer, leadingComments, /*trailingSeparator*/ true, newLine, writeComment);
-            }
-            function emitTrailingComments(node) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                // Emit the trailing comments only if the parent's end doesn't match
-                var trailingComments = getTrailingCommentsToEmit(node);
-                // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment*/
-                ts.emitComments(currentText, currentLineMap, writer, trailingComments, /*trailingSeparator*/ false, newLine, writeComment);
-            }
-            /**
-             * Emit trailing comments at the position. The term trailing comment is used here to describe following comment:
-             *      x, /comment1/ y
-             *        ^ => pos; the function will emit "comment1" in the emitJS
-             */
-            function emitTrailingCommentsOfPosition(pos) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var trailingComments = ts.getTrailingCommentRanges(currentText, pos);
-                // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment*/
-                ts.emitComments(currentText, currentLineMap, writer, trailingComments, /*trailingSeparator*/ true, newLine, writeComment);
-            }
-            function emitLeadingCommentsOfPositionWorker(pos) {
-                if (compilerOptions.removeComments) {
-                    return;
-                }
-                var leadingComments;
-                if (hasDetachedComments(pos)) {
-                    // get comments without detached comments
-                    leadingComments = getLeadingCommentsWithoutDetachedComments();
-                }
-                else {
-                    // get the leading comments from the node
-                    leadingComments = ts.getLeadingCommentRanges(currentText, pos);
-                }
-                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, { pos: pos, end: pos }, leadingComments);
-                // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
-                ts.emitComments(currentText, currentLineMap, writer, leadingComments, /*trailingSeparator*/ true, newLine, writeComment);
-            }
-            function emitDetachedCommentsAndUpdateCommentsInfo(node) {
-                var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, node, newLine, compilerOptions.removeComments);
-                if (currentDetachedCommentInfo) {
-                    if (detachedCommentsInfo) {
-                        detachedCommentsInfo.push(currentDetachedCommentInfo);
-                    }
-                    else {
-                        detachedCommentsInfo = [currentDetachedCommentInfo];
-                    }
-                }
-            }
-            function writeComment(text, lineMap, writer, comment, newLine) {
-                emitPos(comment.pos);
-                ts.writeCommentRange(text, lineMap, writer, comment, newLine);
-                emitPos(comment.end);
-            }
-            function emitShebang() {
-                var shebang = ts.getShebang(currentText);
-                if (shebang) {
-                    write(shebang);
-                    writeLine();
-                }
-            }
-            var _a, _b;
-        }
-        function emitFile(_a, sourceFiles, isBundledEmit) {
-            var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath;
-            // Make sure not to write js File and source map file if any of them cannot be written
-            if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
-                emitJavaScript(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
-            }
-            else {
-                emitSkipped = true;
-            }
-            if (declarationFilePath) {
-                emitSkipped = ts.writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) || emitSkipped;
-            }
-            if (!emitSkipped && emittedFilesList) {
-                emittedFilesList.push(jsFilePath);
-                if (sourceMapFilePath) {
-                    emittedFilesList.push(sourceMapFilePath);
-                }
-                if (declarationFilePath) {
-                    emittedFilesList.push(declarationFilePath);
-                }
-            }
-        }
-    }
-    ts.emitFiles = emitFiles;
-})(ts || (ts = {}));
-/// <reference path="sys.ts" />
-/// <reference path="emitter.ts" />
-/// <reference path="core.ts" />
-var ts;
-(function (ts) {
-    /* @internal */ ts.programTime = 0;
-    /* @internal */ ts.emitTime = 0;
-    /* @internal */ ts.ioReadTime = 0;
-    /* @internal */ ts.ioWriteTime = 0;
-    /** The version of the TypeScript compiler release */
-    var emptyArray = [];
-    var defaultLibrarySearchPaths = [
-        "types/",
-        "node_modules/",
-        "node_modules/@types/",
-    ];
-    ts.version = "1.9.0";
-    function findConfigFile(searchPath, fileExists) {
-        while (true) {
-            var fileName = ts.combinePaths(searchPath, "tsconfig.json");
-            if (fileExists(fileName)) {
-                return fileName;
-            }
-            var parentPath = ts.getDirectoryPath(searchPath);
-            if (parentPath === searchPath) {
-                break;
-            }
-            searchPath = parentPath;
-        }
-        return undefined;
-    }
-    ts.findConfigFile = findConfigFile;
-    function resolveTripleslashReference(moduleName, containingFile) {
-        var basePath = ts.getDirectoryPath(containingFile);
-        var referencedFileName = ts.isRootedDiskPath(moduleName) ? moduleName : ts.combinePaths(basePath, moduleName);
-        return ts.normalizePath(referencedFileName);
-    }
-    ts.resolveTripleslashReference = resolveTripleslashReference;
-    /* @internal */
-    function computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName) {
-        var commonPathComponents;
-        var failed = ts.forEach(fileNames, function (sourceFile) {
-            // Each file contributes into common source file path
-            var sourcePathComponents = ts.getNormalizedPathComponents(sourceFile, currentDirectory);
-            sourcePathComponents.pop(); // The base file name is not part of the common directory path
-            if (!commonPathComponents) {
-                // first file
-                commonPathComponents = sourcePathComponents;
-                return;
-            }
-            for (var i = 0, n = Math.min(commonPathComponents.length, sourcePathComponents.length); i < n; i++) {
-                if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
-                    if (i === 0) {
-                        // Failed to find any common path component
-                        return true;
-                    }
-                    // New common path found that is 0 -> i-1
-                    commonPathComponents.length = i;
-                    break;
-                }
-            }
-            // If the sourcePathComponents was shorter than the commonPathComponents, truncate to the sourcePathComponents
-            if (sourcePathComponents.length < commonPathComponents.length) {
-                commonPathComponents.length = sourcePathComponents.length;
-            }
-        });
-        // A common path can not be found when paths span multiple drives on windows, for example
-        if (failed) {
-            return "";
-        }
-        if (!commonPathComponents) {
-            return currentDirectory;
-        }
-        return ts.getNormalizedPathFromPathComponents(commonPathComponents);
-    }
-    ts.computeCommonSourceDirectoryOfFilenames = computeCommonSourceDirectoryOfFilenames;
-    function trace(host, message) {
-        host.trace(ts.formatMessage.apply(undefined, arguments));
-    }
-    function isTraceEnabled(compilerOptions, host) {
-        return compilerOptions.traceResolution && host.trace !== undefined;
-    }
-    function hasZeroOrOneAsteriskCharacter(str) {
-        var seenAsterisk = false;
-        for (var i = 0; i < str.length; i++) {
-            if (str.charCodeAt(i) === 42 /* asterisk */) {
-                if (!seenAsterisk) {
-                    seenAsterisk = true;
-                }
-                else {
-                    // have already seen asterisk
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-    function createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations) {
-        return { resolvedModule: resolvedFileName ? { resolvedFileName: resolvedFileName, isExternalLibraryImport: isExternalLibraryImport } : undefined, failedLookupLocations: failedLookupLocations };
-    }
-    function moduleHasNonRelativeName(moduleName) {
-        if (ts.isRootedDiskPath(moduleName)) {
-            return false;
-        }
-        var i = moduleName.lastIndexOf("./", 1);
-        var startsWithDotSlashOrDotDotSlash = i === 0 || (i === 1 && moduleName.charCodeAt(0) === 46 /* dot */);
-        return !startsWithDotSlashOrDotDotSlash;
-    }
-    function tryReadTypesSection(packageJsonPath, baseDirectory, state) {
-        var jsonContent;
-        try {
-            var jsonText = state.host.readFile(packageJsonPath);
-            jsonContent = jsonText ? JSON.parse(jsonText) : {};
-        }
-        catch (e) {
-            // gracefully handle if readFile fails or returns not JSON
-            jsonContent = {};
-        }
-        var typesFile;
-        var fieldName;
-        // first try to read content of 'typings' section (backward compatibility)
-        if (jsonContent.typings) {
-            if (typeof jsonContent.typings === "string") {
-                fieldName = "typings";
-                typesFile = jsonContent.typings;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "typings", typeof jsonContent.typings);
-                }
-            }
-        }
-        // then read 'types'
-        if (!typesFile && jsonContent.types) {
-            if (typeof jsonContent.types === "string") {
-                fieldName = "types";
-                typesFile = jsonContent.types;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "types", typeof jsonContent.types);
-                }
-            }
-        }
-        if (typesFile) {
-            var typesFilePath = ts.normalizePath(ts.combinePaths(baseDirectory, typesFile));
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, typesFile, typesFilePath);
-            }
-            return typesFilePath;
-        }
-        return undefined;
-    }
-    var typeReferenceExtensions = [".d.ts"];
-    /**
-     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
-     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
-     * is assumed to be the same as root directory of the project.
-     */
-    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
-        var traceEnabled = isTraceEnabled(options, host);
-        var moduleResolutionState = {
-            compilerOptions: options,
-            host: host,
-            skipTsx: true,
-            traceEnabled: traceEnabled
-        };
-        // use typesRoot and fallback to directory that contains tsconfig or current directory if typesRoot is not set
-        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
-        if (traceEnabled) {
-            if (containingFile === undefined) {
-                if (rootDir === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, rootDir);
-                }
-            }
-            else {
-                if (rootDir === undefined) {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, rootDir);
-                }
-            }
-        }
-        var failedLookupLocations = [];
-        // Check primary library paths
-        if (rootDir !== undefined) {
-            var effectivePrimarySearchPaths = options.typesSearchPaths || defaultLibrarySearchPaths;
-            for (var _i = 0, effectivePrimarySearchPaths_1 = effectivePrimarySearchPaths; _i < effectivePrimarySearchPaths_1.length; _i++) {
-                var searchPath = effectivePrimarySearchPaths_1[_i];
-                var primaryPath = ts.combinePaths(rootDir, searchPath);
-                if (traceEnabled) {
-                    trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, primaryPath);
-                }
-                var candidate = ts.combinePaths(primaryPath, typeReferenceDirectiveName);
-                var candidateDirectory = ts.getDirectoryPath(candidate);
-                var resolvedFile_1 = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations, !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
-                if (resolvedFile_1) {
-                    if (traceEnabled) {
-                        trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile_1, true);
-                    }
-                    return {
-                        resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile_1 },
-                        failedLookupLocations: failedLookupLocations
-                    };
-                }
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
-            }
-        }
-        var resolvedFile;
-        var initialLocationForSecondaryLookup;
-        if (containingFile) {
-            initialLocationForSecondaryLookup = ts.getDirectoryPath(containingFile);
-        }
-        else {
-            initialLocationForSecondaryLookup = rootDir;
-        }
-        if (initialLocationForSecondaryLookup !== undefined) {
-            // check secondary locations
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
-            }
-            resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState);
-            if (traceEnabled) {
-                if (resolvedFile) {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
-                }
-                else {
-                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
-                }
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
-            }
-        }
-        return {
-            resolvedTypeReferenceDirective: resolvedFile
-                ? { primary: false, resolvedFileName: resolvedFile }
-                : undefined,
-            failedLookupLocations: failedLookupLocations
-        };
-    }
-    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
-    function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        if (traceEnabled) {
-            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
-        }
-        var moduleResolution = compilerOptions.moduleResolution;
-        if (moduleResolution === undefined) {
-            moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
-            }
-        }
-        else {
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
-            }
-        }
-        var result;
-        switch (moduleResolution) {
-            case ts.ModuleResolutionKind.NodeJs:
-                result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-            case ts.ModuleResolutionKind.Classic:
-                result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
-                break;
-        }
-        if (traceEnabled) {
-            if (result.resolvedModule) {
-                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
-            }
-            else {
-                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
-            }
-        }
-        return result;
-    }
-    ts.resolveModuleName = resolveModuleName;
-    /**
-     * Any module resolution kind can be augmented with optional settings: 'baseUrl', 'paths' and 'rootDirs' - they are used to
-     * mitigate differences between design time structure of the project and its runtime counterpart so the same import name
-     * can be resolved successfully by TypeScript compiler and runtime module loader.
-     * If these settings are set then loading procedure will try to use them to resolve module name and it can of failure it will
-     * fallback to standard resolution routine.
-     *
-     * - baseUrl - this setting controls how non-relative module names are resolved. If this setting is specified then non-relative
-     * names will be resolved relative to baseUrl: i.e. if baseUrl is '/a/b' then candidate location to resolve module name 'c/d' will
-     * be '/a/b/c/d'
-     * - paths - this setting can only be used when baseUrl is specified. allows to tune how non-relative module names
-     * will be resolved based on the content of the module name.
-     * Structure of 'paths' compiler options
-     * 'paths': {
-     *    pattern-1: [...substitutions],
-     *    pattern-2: [...substitutions],
-     *    ...
-     *    pattern-n: [...substitutions]
-     * }
-     * Pattern here is a string that can contain zero or one '*' character. During module resolution module name will be matched against
-     * all patterns in the list. Matching for patterns that don't contain '*' means that module name must be equal to pattern respecting the case.
-     * If pattern contains '*' then to match pattern "<prefix>*<suffix>" module name must start with the <prefix> and end with <suffix>.
-     * <MatchedStar> denotes part of the module name between <prefix> and <suffix>.
-     * If module name can be matches with multiple patterns then pattern with the longest prefix will be picked.
-     * After selecting pattern we'll use list of substitutions to get candidate locations of the module and the try to load module
-     * from the candidate location.
-     * Substitution is a string that can contain zero or one '*'. To get candidate location from substitution we'll pick every
-     * substitution in the list and replace '*' with <MatchedStar> string. If candidate location is not rooted it
-     * will be converted to absolute using baseUrl.
-     * For example:
-     * baseUrl: /a/b/c
-     * "paths": {
-     *     // match all module names
-     *     "*": [
-     *         "*",        // use matched name as is,
-     *                     // <matched name> will be looked as /a/b/c/<matched name>
-     *
-     *         "folder1/*" // substitution will convert matched name to 'folder1/<matched name>',
-     *                     // since it is not rooted then final candidate location will be /a/b/c/folder1/<matched name>
-     *     ],
-     *     // match module names that start with 'components/'
-     *     "components/*": [ "/root/components/*" ] // substitution will convert /components/folder1/<matched name> to '/root/components/folder1/<matched name>',
-     *                                              // it is rooted so it will be final candidate location
-     * }
-     *
-     * 'rootDirs' allows the project to be spreaded across multiple locations and resolve modules with relative names as if
-     * they were in the same location. For example lets say there are two files
-     * '/local/src/content/file1.ts'
-     * '/shared/components/contracts/src/content/protocols/file2.ts'
-     * After bundling content of '/shared/components/contracts/src' will be merged with '/local/src' so
-     * if file1 has the following import 'import {x} from "./protocols/file2"' it will be resolved successfully in runtime.
-     * 'rootDirs' provides the way to tell compiler that in order to get the whole project it should behave as if content of all
-     * root dirs were merged together.
-     * I.e. for the example above 'rootDirs' will have two entries: [ '/local/src', '/shared/components/contracts/src' ].
-     * Compiler will first convert './protocols/file2' into absolute path relative to the location of containing file:
-     * '/local/src/content/protocols/file2' and try to load it - failure.
-     * Then it will search 'rootDirs' looking for a longest matching prefix of this absolute path and if such prefix is found - absolute path will
-     * be converted to a path relative to found rootDir entry './content/protocols/file2' (*). As a last step compiler will check all remaining
-     * entries in 'rootDirs', use them to build absolute path out of (*) and try to resolve module from this location.
-     */
-    function tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (moduleHasNonRelativeName(moduleName)) {
-            return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
-        }
-        else {
-            return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
-        }
-    }
-    function tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.rootDirs) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
-        }
-        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-        var matchedRootDir;
-        var matchedNormalizedPrefix;
-        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
-            var rootDir = _a[_i];
-            // rootDirs are expected to be absolute
-            // in case of tsconfig.json this will happen automatically - compiler will expand relative names
-            // using location of tsconfig.json as base location
-            var normalizedRoot = ts.normalizePath(rootDir);
-            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
-                normalizedRoot += ts.directorySeparator;
-            }
-            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
-                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
-            }
-            if (isLongestMatchingPrefix) {
-                matchedNormalizedPrefix = normalizedRoot;
-                matchedRootDir = rootDir;
-            }
-        }
-        if (matchedNormalizedPrefix) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
-            }
-            var suffix = candidate.substr(matchedNormalizedPrefix.length);
-            // first - try to load from a initial location
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
-            }
-            var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
-            if (resolvedFileName) {
-                return resolvedFileName;
-            }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
-            }
-            // then try to resolve using remaining entries in rootDirs
-            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
-                var rootDir = _c[_b];
-                if (rootDir === matchedRootDir) {
-                    // skip the initially matched entry
-                    continue;
-                }
-                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
-                }
-                var baseDirectory = ts.getDirectoryPath(candidate_1);
-                var resolvedFileName_1 = loader(candidate_1, supportedExtensions, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
-                if (resolvedFileName_1) {
-                    return resolvedFileName_1;
-                }
-            }
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
-            }
-        }
-        return undefined;
-    }
-    function tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state) {
-        if (!state.compilerOptions.baseUrl) {
-            return undefined;
-        }
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
-        }
-        var longestMatchPrefixLength = -1;
-        var matchedPattern;
-        var matchedStar;
-        if (state.compilerOptions.paths) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
-            }
-            for (var key in state.compilerOptions.paths) {
-                var pattern = key;
-                var indexOfStar = pattern.indexOf("*");
-                if (indexOfStar !== -1) {
-                    var prefix = pattern.substr(0, indexOfStar);
-                    var suffix = pattern.substr(indexOfStar + 1);
-                    if (moduleName.length >= prefix.length + suffix.length &&
-                        ts.startsWith(moduleName, prefix) &&
-                        ts.endsWith(moduleName, suffix)) {
-                        // use length of prefix as betterness criteria
-                        if (prefix.length > longestMatchPrefixLength) {
-                            longestMatchPrefixLength = prefix.length;
-                            matchedPattern = pattern;
-                            matchedStar = moduleName.substr(prefix.length, moduleName.length - suffix.length);
-                        }
-                    }
-                }
-                else if (pattern === moduleName) {
-                    // pattern was matched as is - no need to search further
-                    matchedPattern = pattern;
-                    matchedStar = undefined;
-                    break;
-                }
-            }
-        }
-        if (matchedPattern) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPattern);
-            }
-            for (var _i = 0, _a = state.compilerOptions.paths[matchedPattern]; _i < _a.length; _i++) {
-                var subst = _a[_i];
-                var path = matchedStar ? subst.replace("\*", matchedStar) : subst;
-                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
-                }
-                var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
-                if (resolvedFileName) {
-                    return resolvedFileName;
-                }
-            }
-            return undefined;
-        }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
-            }
-            return loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
-        }
-    }
-    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var failedLookupLocations = [];
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: false };
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName, failedLookupLocations, supportedExtensions, state);
-        var isExternalLibraryImport = false;
-        if (!resolvedFileName) {
-            if (moduleHasNonRelativeName(moduleName)) {
-                if (traceEnabled) {
-                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
-                }
-                resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state);
-                isExternalLibraryImport = resolvedFileName !== undefined;
-            }
-            else {
-                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
-            }
-        }
-        if (resolvedFileName && host.realpath) {
-            var originalFileName = resolvedFileName;
-            resolvedFileName = ts.normalizePath(host.realpath(resolvedFileName));
-            if (traceEnabled) {
-                trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
-            }
-        }
-        return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
-    }
-    ts.nodeModuleNameResolver = nodeModuleNameResolver;
-    function nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state) {
-        if (state.traceEnabled) {
-            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
-        }
-        var resolvedFileName = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
-        return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
-    }
-    /* @internal */
-    function directoryProbablyExists(directoryName, host) {
-        // if host does not support 'directoryExists' assume that directory will exist
-        return !host.directoryExists || host.directoryExists(directoryName);
-    }
-    ts.directoryProbablyExists = directoryProbablyExists;
-    /**
-     * @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
-     * in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
-     */
-    function loadModuleFromFile(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
-        if (!onlyRecordFailures) {
-            // check if containig folder exists - if it doesn't then just record failures for all supported extensions without disk probing
-            var directory = ts.getDirectoryPath(candidate);
-            if (directory) {
-                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
-            }
-        }
-        return ts.forEach(extensions, tryLoad);
-        function tryLoad(ext) {
-            if (ext === ".tsx" && state.skipTsx) {
-                return undefined;
-            }
-            var fileName = ts.fileExtensionIs(candidate, ext) ? candidate : candidate + ext;
-            if (!onlyRecordFailures && state.host.fileExists(fileName)) {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
-                }
-                return fileName;
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
-                }
-                failedLookupLocation.push(fileName);
-                return undefined;
-            }
-        }
-    }
-    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocation, onlyRecordFailures, state) {
-        var packageJsonPath = ts.combinePaths(candidate, "package.json");
-        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
-        if (directoryExists && state.host.fileExists(packageJsonPath)) {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
-            }
-            var typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
-            if (typesFile) {
-                var result = loadModuleFromFile(typesFile, extensions, failedLookupLocation, !directoryProbablyExists(ts.getDirectoryPath(typesFile), state.host), state);
-                if (result) {
-                    return result;
-                }
-            }
-            else {
-                if (state.traceEnabled) {
-                    trace(state.host, ts.Diagnostics.package_json_does_not_have_types_field);
-                }
-            }
-        }
-        else {
-            if (state.traceEnabled) {
-                trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
-            }
-            // record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
-            failedLookupLocation.push(packageJsonPath);
-        }
-        return loadModuleFromFile(ts.combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
-    }
-    function loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) {
-        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
-        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
-        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
-        // Load only typescript files irrespective of allowJs option if loading from node modules
-        var result = loadModuleFromFile(candidate, ts.supportedTypeScriptExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
-        }
-        result = loadNodeModuleFromDirectory(ts.supportedTypeScriptExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
-        if (result) {
-            return result;
-        }
-    }
-    function loadModuleFromNodeModules(moduleName, directory, failedLookupLocations, state) {
-        directory = ts.normalizeSlashes(directory);
-        while (true) {
-            var baseName = ts.getBaseFileName(directory);
-            if (baseName !== "node_modules") {
-                var result = 
-                // first: try to load module as-is
-                loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) ||
-                    // second: try to load module from the scope '@types'
-                    loadModuleFromNodeModulesFolder(ts.combinePaths("@types", moduleName), directory, failedLookupLocations, state);
-                if (result) {
-                    return result;
-                }
-            }
-            var parentPath = ts.getDirectoryPath(directory);
-            if (parentPath === directory) {
-                break;
-            }
-            directory = parentPath;
-        }
-        return undefined;
-    }
-    function classicNameResolver(moduleName, containingFile, compilerOptions, host) {
-        var traceEnabled = isTraceEnabled(compilerOptions, host);
-        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: !compilerOptions.jsx };
-        var failedLookupLocations = [];
-        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
-        var containingDirectory = ts.getDirectoryPath(containingFile);
-        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
-        if (resolvedFileName) {
-            return createResolvedModule(resolvedFileName, /*isExternalLibraryImport*/ false, failedLookupLocations);
-        }
-        var referencedSourceFile;
-        if (moduleHasNonRelativeName(moduleName)) {
-            while (true) {
-                var searchName = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-                referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
-                if (referencedSourceFile) {
-                    break;
-                }
-                var parentPath = ts.getDirectoryPath(containingDirectory);
-                if (parentPath === containingDirectory) {
-                    break;
-                }
-                containingDirectory = parentPath;
-            }
-        }
-        else {
-            var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
-            referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
-        }
-        return referencedSourceFile
-            ? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations: failedLookupLocations }
-            : { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
-    }
-    ts.classicNameResolver = classicNameResolver;
-    /* @internal */
-    ts.defaultInitCompilerOptions = {
-        module: ts.ModuleKind.CommonJS,
-        target: 1 /* ES5 */,
-        noImplicitAny: false,
-        sourceMap: false
-    };
-    function createCompilerHost(options, setParentNodes) {
-        var existingDirectories = {};
-        function getCanonicalFileName(fileName) {
-            // if underlying system can distinguish between two files whose names differs only in cases then file name already in canonical form.
-            // otherwise use toLowerCase as a canonical form.
-            return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
-        }
-        // returned by CScript sys environment
-        var unsupportedFileEncodingErrorCode = -2147024809;
-        function getSourceFile(fileName, languageVersion, onError) {
-            var text;
-            try {
-                var start = new Date().getTime();
-                text = ts.sys.readFile(fileName, options.charset);
-                ts.ioReadTime += new Date().getTime() - start;
-            }
-            catch (e) {
-                if (onError) {
-                    onError(e.number === unsupportedFileEncodingErrorCode
-                        ? ts.createCompilerDiagnostic(ts.Diagnostics.Unsupported_file_encoding).messageText
-                        : e.message);
-                }
-                text = "";
-            }
-            return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
-        }
-        function directoryExists(directoryPath) {
-            if (ts.hasProperty(existingDirectories, directoryPath)) {
-                return true;
-            }
-            if (ts.sys.directoryExists(directoryPath)) {
-                existingDirectories[directoryPath] = true;
-                return true;
-            }
-            return false;
-        }
-        function ensureDirectoriesExist(directoryPath) {
-            if (directoryPath.length > ts.getRootLength(directoryPath) && !directoryExists(directoryPath)) {
-                var parentDirectory = ts.getDirectoryPath(directoryPath);
-                ensureDirectoriesExist(parentDirectory);
-                ts.sys.createDirectory(directoryPath);
-            }
-        }
-        var outputFingerprints;
-        function writeFileIfUpdated(fileName, data, writeByteOrderMark) {
-            if (!outputFingerprints) {
-                outputFingerprints = {};
-            }
-            var hash = ts.sys.createHash(data);
-            var mtimeBefore = ts.sys.getModifiedTime(fileName);
-            if (mtimeBefore && ts.hasProperty(outputFingerprints, fileName)) {
-                var fingerprint = outputFingerprints[fileName];
-                // If output has not been changed, and the file has no external modification
-                if (fingerprint.byteOrderMark === writeByteOrderMark &&
-                    fingerprint.hash === hash &&
-                    fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
-                    return;
-                }
-            }
-            ts.sys.writeFile(fileName, data, writeByteOrderMark);
-            var mtimeAfter = ts.sys.getModifiedTime(fileName);
-            outputFingerprints[fileName] = {
-                hash: hash,
-                byteOrderMark: writeByteOrderMark,
-                mtime: mtimeAfter
-            };
-        }
-        function writeFile(fileName, data, writeByteOrderMark, onError) {
-            try {
-                var start = new Date().getTime();
-                ensureDirectoriesExist(ts.getDirectoryPath(ts.normalizePath(fileName)));
-                if (ts.isWatchSet(options) && ts.sys.createHash && ts.sys.getModifiedTime) {
-                    writeFileIfUpdated(fileName, data, writeByteOrderMark);
-                }
-                else {
-                    ts.sys.writeFile(fileName, data, writeByteOrderMark);
-                }
-                ts.ioWriteTime += new Date().getTime() - start;
-            }
-            catch (e) {
-                if (onError) {
-                    onError(e.message);
-                }
-            }
-        }
-        function getDefaultTypeDirectiveNames(rootPath) {
-            var localTypes = ts.combinePaths(rootPath, "types");
-            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
-            var result = [];
-            if (ts.sys.directoryExists(localTypes)) {
-                result = result.concat(ts.sys.getDirectories(localTypes));
-            }
-            if (ts.sys.directoryExists(npmTypes)) {
-                result = result.concat(ts.sys.getDirectories(npmTypes));
-            }
-            return result;
-        }
-        function getDefaultLibLocation() {
-            return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
-        }
-        var newLine = ts.getNewLineCharacter(options);
-        var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
-        return {
-            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
-            getSourceFile: getSourceFile,
-            getDefaultLibLocation: getDefaultLibLocation,
-            getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
-            writeFile: writeFile,
-            getCurrentDirectory: ts.memoize(function () { return ts.sys.getCurrentDirectory(); }),
-            useCaseSensitiveFileNames: function () { return ts.sys.useCaseSensitiveFileNames; },
-            getCanonicalFileName: getCanonicalFileName,
-            getNewLine: function () { return newLine; },
-            fileExists: function (fileName) { return ts.sys.fileExists(fileName); },
-            readFile: function (fileName) { return ts.sys.readFile(fileName); },
-            trace: function (s) { return ts.sys.write(s + newLine); },
-            directoryExists: function (directoryName) { return ts.sys.directoryExists(directoryName); },
-            realpath: realpath
-        };
-    }
-    ts.createCompilerHost = createCompilerHost;
-    function getPreEmitDiagnostics(program, sourceFile, cancellationToken) {
-        var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
-        if (program.getCompilerOptions().declaration) {
-            diagnostics = diagnostics.concat(program.getDeclarationDiagnostics(sourceFile, cancellationToken));
-        }
-        return ts.sortAndDeduplicateDiagnostics(diagnostics);
-    }
-    ts.getPreEmitDiagnostics = getPreEmitDiagnostics;
-    function flattenDiagnosticMessageText(messageText, newLine) {
-        if (typeof messageText === "string") {
-            return messageText;
-        }
-        else {
-            var diagnosticChain = messageText;
-            var result = "";
-            var indent = 0;
-            while (diagnosticChain) {
-                if (indent) {
-                    result += newLine;
-                    for (var i = 0; i < indent; i++) {
-                        result += "  ";
-                    }
-                }
-                result += diagnosticChain.messageText;
-                indent++;
-                diagnosticChain = diagnosticChain.next;
-            }
-            return result;
-        }
-    }
-    ts.flattenDiagnosticMessageText = flattenDiagnosticMessageText;
-    function loadWithLocalCache(names, containingFile, loader) {
-        if (names.length === 0) {
-            return [];
-        }
-        var resolutions = [];
-        var cache = {};
-        for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
-            var name_33 = names_1[_i];
-            var result = void 0;
-            if (ts.hasProperty(cache, name_33)) {
-                result = cache[name_33];
-            }
-            else {
-                result = loader(name_33, containingFile);
-                cache[name_33] = result;
-            }
-            resolutions.push(result);
-        }
-        return resolutions;
-    }
-    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
-        // Use explicit type list from tsconfig.json
-        if (options.types) {
-            return options.types;
-        }
-        // or load all types from the automatic type import fields
-        if (host && host.getDefaultTypeDirectiveNames) {
-            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
-            if (commonRoot) {
-                return host.getDefaultTypeDirectiveNames(commonRoot);
-            }
-        }
-        return undefined;
-    }
-    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
-    function createProgram(rootNames, options, host, oldProgram) {
-        var program;
-        var files = [];
-        var commonSourceDirectory;
-        var diagnosticsProducingTypeChecker;
-        var noDiagnosticsTypeChecker;
-        var classifiableNames;
-        var resolvedTypeReferenceDirectives = {};
-        var fileProcessingDiagnostics = ts.createDiagnosticCollection();
-        var start = new Date().getTime();
-        host = host || createCompilerHost(options);
-        var skipDefaultLib = options.noLib;
-        var programDiagnostics = ts.createDiagnosticCollection();
-        var currentDirectory = host.getCurrentDirectory();
-        var supportedExtensions = ts.getSupportedExtensions(options);
-        // Map storing if there is emit blocking diagnostics for given input
-        var hasEmitBlockingDiagnostics = ts.createFileMap(getCanonicalFileName);
-        var resolveModuleNamesWorker;
-        if (host.resolveModuleNames) {
-            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
-        }
-        else {
-            var loader_1 = function (moduleName, containingFile) { return resolveModuleName(moduleName, containingFile, options, host).resolvedModule; };
-            resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(moduleNames, containingFile, loader_1); };
-        }
-        var resolveTypeReferenceDirectiveNamesWorker;
-        if (host.resolveTypeReferenceDirectives) {
-            resolveTypeReferenceDirectiveNamesWorker = function (typeDirectiveNames, containingFile) { return host.resolveTypeReferenceDirectives(typeDirectiveNames, containingFile); };
-        }
-        else {
-            var loader_2 = function (typesRef, containingFile) { return resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective; };
-            resolveTypeReferenceDirectiveNamesWorker = function (typeReferenceDirectiveNames, containingFile) { return loadWithLocalCache(typeReferenceDirectiveNames, containingFile, loader_2); };
-        }
-        var filesByName = ts.createFileMap();
-        // stores 'filename -> file association' ignoring case
-        // used to track cases when two file names differ only in casing
-        var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
-        if (!tryReuseStructureFromOldProgram()) {
-            ts.forEach(rootNames, function (name) { return processRootFile(name, /*isDefaultLib*/ false); });
-            // load type declarations specified via 'types' argument
-            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
-            if (typeReferences) {
-                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, /*containingFile*/ undefined);
-                for (var i = 0; i < typeReferences.length; i++) {
-                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
-                }
-            }
-            // Do not process the default library if:
-            //  - The '--noLib' flag is used.
-            //  - A 'no-default-lib' reference comment is encountered in
-            //      processing the root files.
-            if (!skipDefaultLib) {
-                // If '--lib' is not specified, include default library file according to '--target'
-                // otherwise, using options specified in '--lib' instead of '--target' default library file
-                if (!options.lib) {
-                    processRootFile(host.getDefaultLibFileName(options), /*isDefaultLib*/ true);
-                }
-                else {
-                    var libDirectory_1 = host.getDefaultLibLocation ? host.getDefaultLibLocation() : ts.getDirectoryPath(host.getDefaultLibFileName(options));
-                    ts.forEach(options.lib, function (libFileName) {
-                        processRootFile(ts.combinePaths(libDirectory_1, libFileName), /*isDefaultLib*/ true);
-                    });
-                }
-            }
-        }
-        // unconditionally set oldProgram to undefined to prevent it from being captured in closure
-        oldProgram = undefined;
-        program = {
-            getRootFileNames: function () { return rootNames; },
-            getSourceFile: getSourceFile,
-            getSourceFileByPath: getSourceFileByPath,
-            getSourceFiles: function () { return files; },
-            getCompilerOptions: function () { return options; },
-            getSyntacticDiagnostics: getSyntacticDiagnostics,
-            getOptionsDiagnostics: getOptionsDiagnostics,
-            getGlobalDiagnostics: getGlobalDiagnostics,
-            getSemanticDiagnostics: getSemanticDiagnostics,
-            getDeclarationDiagnostics: getDeclarationDiagnostics,
-            getTypeChecker: getTypeChecker,
-            getClassifiableNames: getClassifiableNames,
-            getDiagnosticsProducingTypeChecker: getDiagnosticsProducingTypeChecker,
-            getCommonSourceDirectory: getCommonSourceDirectory,
-            emit: emit,
-            getCurrentDirectory: function () { return currentDirectory; },
-            getNodeCount: function () { return getDiagnosticsProducingTypeChecker().getNodeCount(); },
-            getIdentifierCount: function () { return getDiagnosticsProducingTypeChecker().getIdentifierCount(); },
-            getSymbolCount: function () { return getDiagnosticsProducingTypeChecker().getSymbolCount(); },
-            getTypeCount: function () { return getDiagnosticsProducingTypeChecker().getTypeCount(); },
-            getFileProcessingDiagnostics: function () { return fileProcessingDiagnostics; },
-            getResolvedTypeReferenceDirectives: function () { return resolvedTypeReferenceDirectives; }
-        };
-        verifyCompilerOptions();
-        ts.programTime += new Date().getTime() - start;
-        return program;
-        function getCommonSourceDirectory() {
-            if (typeof commonSourceDirectory === "undefined") {
-                if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
-                    // If a rootDir is specified and is valid use it as the commonSourceDirectory
-                    commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
-                }
-                else {
-                    commonSourceDirectory = computeCommonSourceDirectory(files);
-                }
-                if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
-                    // Make sure directory path ends with directory separator so this string can directly
-                    // used to replace with "" to get the relative path of the source file and the relative path doesn't
-                    // start with / making it rooted path
-                    commonSourceDirectory += ts.directorySeparator;
-                }
-            }
-            return commonSourceDirectory;
-        }
-        function getClassifiableNames() {
-            if (!classifiableNames) {
-                // Initialize a checker so that all our files are bound.
-                getTypeChecker();
-                classifiableNames = {};
-                for (var _i = 0, files_3 = files; _i < files_3.length; _i++) {
-                    var sourceFile = files_3[_i];
-                    ts.copyMap(sourceFile.classifiableNames, classifiableNames);
-                }
-            }
-            return classifiableNames;
-        }
-        function tryReuseStructureFromOldProgram() {
-            if (!oldProgram) {
-                return false;
-            }
-            // check properties that can affect structure of the program or module resolution strategy
-            // if any of these properties has changed - structure cannot be reused
-            var oldOptions = oldProgram.getCompilerOptions();
-            if ((oldOptions.module !== options.module) ||
-                (oldOptions.noResolve !== options.noResolve) ||
-                (oldOptions.target !== options.target) ||
-                (oldOptions.noLib !== options.noLib) ||
-                (oldOptions.jsx !== options.jsx) ||
-                (oldOptions.allowJs !== options.allowJs) ||
-                (oldOptions.rootDir !== options.rootDir) ||
-                (oldOptions.typesSearchPaths !== options.typesSearchPaths) ||
-                (oldOptions.configFilePath !== options.configFilePath) ||
-                (oldOptions.baseUrl !== options.baseUrl) ||
-                (oldOptions.typesRoot !== options.typesRoot) ||
-                !ts.arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
-                !ts.mapIsEqualTo(oldOptions.paths, options.paths)) {
-                return false;
-            }
-            ts.Debug.assert(!oldProgram.structureIsReused);
-            // there is an old program, check if we can reuse its structure
-            var oldRootNames = oldProgram.getRootFileNames();
-            if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
-                return false;
-            }
-            if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
-                return false;
-            }
-            // check if program source files has changed in the way that can affect structure of the program
-            var newSourceFiles = [];
-            var filePaths = [];
-            var modifiedSourceFiles = [];
-            for (var _i = 0, _a = oldProgram.getSourceFiles(); _i < _a.length; _i++) {
-                var oldSourceFile = _a[_i];
-                var newSourceFile = host.getSourceFileByPath
-                    ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target)
-                    : host.getSourceFile(oldSourceFile.fileName, options.target);
-                if (!newSourceFile) {
-                    return false;
-                }
-                newSourceFile.path = oldSourceFile.path;
-                filePaths.push(newSourceFile.path);
-                if (oldSourceFile !== newSourceFile) {
-                    if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
-                        // value of no-default-lib has changed
-                        // this will affect if default library is injected into the list of files
-                        return false;
-                    }
-                    // check tripleslash references
-                    if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
-                        // tripleslash references has changed
-                        return false;
-                    }
-                    // check imports and module augmentations
-                    collectExternalModuleReferences(newSourceFile);
-                    if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
-                        // imports has changed
-                        return false;
-                    }
-                    if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
-                        // moduleAugmentations has changed
-                        return false;
-                    }
-                    if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
-                        // 'types' references has changed
-                        return false;
-                    }
-                    var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
-                    if (resolveModuleNamesWorker) {
-                        var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
-                        var resolutions = resolveModuleNamesWorker(moduleNames, newSourceFilePath);
-                        // ensure that module resolution results are still correct
-                        var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
-                    }
-                    if (resolveTypeReferenceDirectiveNamesWorker) {
-                        var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
-                        var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
-                        // ensure that types resolutions are still correct
-                        var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
-                        if (resolutionsChanged) {
-                            return false;
-                        }
-                    }
-                    // pass the cache of module/types resolutions from the old source file
-                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
-                    newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
-                    modifiedSourceFiles.push(newSourceFile);
-                }
-                else {
-                    // file has no changes - use it as is
-                    newSourceFile = oldSourceFile;
-                }
-                // if file has passed all checks it should be safe to reuse it
-                newSourceFiles.push(newSourceFile);
-            }
-            // update fileName -> file mapping
-            for (var i = 0, len = newSourceFiles.length; i < len; i++) {
-                filesByName.set(filePaths[i], newSourceFiles[i]);
-            }
-            files = newSourceFiles;
-            fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
-            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
-                var modifiedFile = modifiedSourceFiles_1[_b];
-                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile);
-            }
-            resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
-            oldProgram.structureIsReused = true;
-            return true;
-        }
-        function getEmitHost(writeFileCallback) {
-            return {
-                getCanonicalFileName: getCanonicalFileName,
-                getCommonSourceDirectory: program.getCommonSourceDirectory,
-                getCompilerOptions: program.getCompilerOptions,
-                getCurrentDirectory: function () { return currentDirectory; },
-                getNewLine: function () { return host.getNewLine(); },
-                getSourceFile: program.getSourceFile,
-                getSourceFileByPath: program.getSourceFileByPath,
-                getSourceFiles: program.getSourceFiles,
-                writeFile: writeFileCallback || (function (fileName, data, writeByteOrderMark, onError, sourceFiles) { return host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles); }),
-                isEmitBlocked: isEmitBlocked
-            };
-        }
-        function getDiagnosticsProducingTypeChecker() {
-            return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ true));
-        }
-        function getTypeChecker() {
-            return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ false));
-        }
-        function emit(sourceFile, writeFileCallback, cancellationToken) {
-            var _this = this;
-            return runWithCancellationToken(function () { return emitWorker(_this, sourceFile, writeFileCallback, cancellationToken); });
-        }
-        function isEmitBlocked(emitFileName) {
-            return hasEmitBlockingDiagnostics.contains(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName));
-        }
-        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken) {
-            var declarationDiagnostics = [];
-            if (options.noEmit) {
-                return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
-            }
-            // If the noEmitOnError flag is set, then check if we have any errors so far.  If so,
-            // immediately bail out.  Note that we pass 'undefined' for 'sourceFile' so that we
-            // get any preEmit diagnostics, not just the ones
-            if (options.noEmitOnError) {
-                var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
-                if (diagnostics.length === 0 && program.getCompilerOptions().declaration) {
-                    declarationDiagnostics = program.getDeclarationDiagnostics(/*sourceFile*/ undefined, cancellationToken);
-                }
-                if (diagnostics.length > 0 || declarationDiagnostics.length > 0) {
-                    return {
-                        diagnostics: ts.concatenate(diagnostics, declarationDiagnostics),
-                        sourceMaps: undefined,
-                        emittedFiles: undefined,
-                        emitSkipped: true
-                    };
-                }
-            }
-            // Create the emit resolver outside of the "emitTime" tracking code below.  That way
-            // any cost associated with it (like type checking) are appropriate associated with
-            // the type-checking counter.
-            //
-            // If the -out option is specified, we should not pass the source file to getEmitResolver.
-            // This is because in the -out scenario all files need to be emitted, and therefore all
-            // files need to be type checked. And the way to specify that all files need to be type
-            // checked is to not pass the file to getEmitResolver.
-            var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile);
-            var start = new Date().getTime();
-            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile);
-            ts.emitTime += new Date().getTime() - start;
-            return emitResult;
-        }
-        function getSourceFile(fileName) {
-            return getSourceFileByPath(ts.toPath(fileName, currentDirectory, getCanonicalFileName));
-        }
-        function getSourceFileByPath(path) {
-            return filesByName.get(path);
-        }
-        function getDiagnosticsHelper(sourceFile, getDiagnostics, cancellationToken) {
-            if (sourceFile) {
-                return getDiagnostics(sourceFile, cancellationToken);
-            }
-            var allDiagnostics = [];
-            ts.forEach(program.getSourceFiles(), function (sourceFile) {
-                if (cancellationToken) {
-                    cancellationToken.throwIfCancellationRequested();
-                }
-                ts.addRange(allDiagnostics, getDiagnostics(sourceFile, cancellationToken));
-            });
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function getSyntacticDiagnostics(sourceFile, cancellationToken) {
-            return getDiagnosticsHelper(sourceFile, getSyntacticDiagnosticsForFile, cancellationToken);
-        }
-        function getSemanticDiagnostics(sourceFile, cancellationToken) {
-            return getDiagnosticsHelper(sourceFile, getSemanticDiagnosticsForFile, cancellationToken);
-        }
-        function getDeclarationDiagnostics(sourceFile, cancellationToken) {
-            var options = program.getCompilerOptions();
-            // collect diagnostics from the program only once if either no source file was specified or out/outFile is set (bundled emit)
-            if (!sourceFile || options.out || options.outFile) {
-                return getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
-            }
-            else {
-                return getDiagnosticsHelper(sourceFile, getDeclarationDiagnosticsForFile, cancellationToken);
-            }
-        }
-        function getSyntacticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return sourceFile.parseDiagnostics;
-        }
-        function runWithCancellationToken(func) {
-            try {
-                return func();
-            }
-            catch (e) {
-                if (e instanceof ts.OperationCanceledException) {
-                    // We were canceled while performing the operation.  Because our type checker
-                    // might be a bad state, we need to throw it away.
-                    //
-                    // Note: we are overly aggressive here.  We do not actually *have* to throw away
-                    // the "noDiagnosticsTypeChecker".  However, for simplicity, i'd like to keep
-                    // the lifetimes of these two TypeCheckers the same.  Also, we generally only
-                    // cancel when the user has made a change anyways.  And, in that case, we (the
-                    // program instance) will get thrown away anyways.  So trying to keep one of
-                    // these type checkers alive doesn't serve much purpose.
-                    noDiagnosticsTypeChecker = undefined;
-                    diagnosticsProducingTypeChecker = undefined;
-                }
-                throw e;
-            }
-        }
-        function getSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var typeChecker = getDiagnosticsProducingTypeChecker();
-                ts.Debug.assert(!!sourceFile.bindDiagnostics);
-                var bindDiagnostics = sourceFile.bindDiagnostics;
-                // For JavaScript files, we don't want to report the normal typescript semantic errors.
-                // Instead, we just report errors for using TypeScript-only constructs from within a
-                // JavaScript file.
-                var checkDiagnostics = ts.isSourceFileJavaScript(sourceFile) ?
-                    getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) :
-                    typeChecker.getDiagnostics(sourceFile, cancellationToken);
-                var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
-                var programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
-                return bindDiagnostics.concat(checkDiagnostics).concat(fileProcessingDiagnosticsInFile).concat(programDiagnosticsInFile);
-            });
-        }
-        function getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var diagnostics = [];
-                walk(sourceFile);
-                return diagnostics;
-                function walk(node) {
-                    if (!node) {
-                        return false;
-                    }
-                    switch (node.kind) {
-                        case 229 /* ImportEqualsDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 235 /* ExportAssignment */:
-                            if (node.isExportEquals) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 221 /* ClassDeclaration */:
-                            var classDeclaration = node;
-                            if (checkModifiers(classDeclaration.modifiers) ||
-                                checkTypeParameters(classDeclaration.typeParameters)) {
-                                return true;
-                            }
-                            break;
-                        case 251 /* HeritageClause */:
-                            var heritageClause = node;
-                            if (heritageClause.token === 106 /* ImplementsKeyword */) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 222 /* InterfaceDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 225 /* ModuleDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 223 /* TypeAliasDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 148 /* Constructor */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                        case 179 /* FunctionExpression */:
-                        case 220 /* FunctionDeclaration */:
-                        case 180 /* ArrowFunction */:
-                        case 220 /* FunctionDeclaration */:
-                            var functionDeclaration = node;
-                            if (checkModifiers(functionDeclaration.modifiers) ||
-                                checkTypeParameters(functionDeclaration.typeParameters) ||
-                                checkTypeAnnotation(functionDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 200 /* VariableStatement */:
-                            var variableStatement = node;
-                            if (checkModifiers(variableStatement.modifiers)) {
-                                return true;
-                            }
-                            break;
-                        case 218 /* VariableDeclaration */:
-                            var variableDeclaration = node;
-                            if (checkTypeAnnotation(variableDeclaration.type)) {
-                                return true;
-                            }
-                            break;
-                        case 174 /* CallExpression */:
-                        case 175 /* NewExpression */:
-                            var expression = node;
-                            if (expression.typeArguments && expression.typeArguments.length > 0) {
-                                var start_2 = expression.typeArguments.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_2, expression.typeArguments.end - start_2, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 142 /* Parameter */:
-                            var parameter = node;
-                            if (parameter.modifiers) {
-                                var start_3 = parameter.modifiers.pos;
-                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_3, parameter.modifiers.end - start_3, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            if (parameter.questionToken) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
-                                return true;
-                            }
-                            if (parameter.type) {
-                                diagnostics.push(ts.createDiagnosticForNode(parameter.type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                                return true;
-                            }
-                            break;
-                        case 145 /* PropertyDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.property_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 224 /* EnumDeclaration */:
-                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 177 /* TypeAssertionExpression */:
-                            var typeAssertionExpression = node;
-                            diagnostics.push(ts.createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
-                            return true;
-                        case 143 /* Decorator */:
-                            if (!options.experimentalDecorators) {
-                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
-                            }
-                            return true;
-                    }
-                    return ts.forEachChild(node, walk);
-                }
-                function checkTypeParameters(typeParameters) {
-                    if (typeParameters) {
-                        var start_4 = typeParameters.pos;
-                        diagnostics.push(ts.createFileDiagnostic(sourceFile, start_4, typeParameters.end - start_4, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
-                        return true;
-                    }
-                    return false;
-                }
-                function checkTypeAnnotation(type) {
-                    if (type) {
-                        diagnostics.push(ts.createDiagnosticForNode(type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
-                        return true;
-                    }
-                    return false;
-                }
-                function checkModifiers(modifiers) {
-                    if (modifiers) {
-                        for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
-                            var modifier = modifiers_1[_i];
-                            switch (modifier.kind) {
-                                case 112 /* PublicKeyword */:
-                                case 110 /* PrivateKeyword */:
-                                case 111 /* ProtectedKeyword */:
-                                case 128 /* ReadonlyKeyword */:
-                                case 122 /* DeclareKeyword */:
-                                    diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
-                                    return true;
-                                // These are all legal modifiers.
-                                case 113 /* StaticKeyword */:
-                                case 82 /* ExportKeyword */:
-                                case 74 /* ConstKeyword */:
-                                case 77 /* DefaultKeyword */:
-                                case 115 /* AbstractKeyword */:
-                            }
-                        }
-                    }
-                    return false;
-                }
-            });
-        }
-        function getDeclarationDiagnosticsWorker(sourceFile, cancellationToken) {
-            return runWithCancellationToken(function () {
-                var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
-                // Don't actually write any files since we're just getting diagnostics.
-                var writeFile = function () { };
-                return ts.getDeclarationDiagnostics(getEmitHost(writeFile), resolver, sourceFile);
-            });
-        }
-        function getDeclarationDiagnosticsForFile(sourceFile, cancellationToken) {
-            return ts.isDeclarationFile(sourceFile) ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
-        }
-        function getOptionsDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, fileProcessingDiagnostics.getGlobalDiagnostics());
-            ts.addRange(allDiagnostics, programDiagnostics.getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function getGlobalDiagnostics() {
-            var allDiagnostics = [];
-            ts.addRange(allDiagnostics, getDiagnosticsProducingTypeChecker().getGlobalDiagnostics());
-            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
-        }
-        function hasExtension(fileName) {
-            return ts.getBaseFileName(fileName).indexOf(".") >= 0;
-        }
-        function processRootFile(fileName, isDefaultLib) {
-            processSourceFile(ts.normalizePath(fileName), isDefaultLib, /*isReference*/ true);
-        }
-        function fileReferenceIsEqualTo(a, b) {
-            return a.fileName === b.fileName;
-        }
-        function moduleNameIsEqualTo(a, b) {
-            return a.text === b.text;
-        }
-        function getTextOfLiteral(literal) {
-            return literal.text;
-        }
-        function collectExternalModuleReferences(file) {
-            if (file.imports) {
-                return;
-            }
-            var isJavaScriptFile = ts.isSourceFileJavaScript(file);
-            var isExternalModuleFile = ts.isExternalModule(file);
-            var imports;
-            var moduleAugmentations;
-            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
-                var node = _a[_i];
-                collectModuleReferences(node, /*inAmbientModule*/ false);
-                if (isJavaScriptFile) {
-                    collectRequireCalls(node);
-                }
-            }
-            file.imports = imports || emptyArray;
-            file.moduleAugmentations = moduleAugmentations || emptyArray;
-            return;
-            function collectModuleReferences(node, inAmbientModule) {
-                switch (node.kind) {
-                    case 230 /* ImportDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 236 /* ExportDeclaration */:
-                        var moduleNameExpr = ts.getExternalModuleName(node);
-                        if (!moduleNameExpr || moduleNameExpr.kind !== 9 /* StringLiteral */) {
-                            break;
-                        }
-                        if (!moduleNameExpr.text) {
-                            break;
-                        }
-                        // TypeScript 1.0 spec (April 2014): 12.1.6
-                        // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference other external modules
-                        // only through top - level external module names. Relative external module names are not permitted.
-                        if (!inAmbientModule || !ts.isExternalModuleNameRelative(moduleNameExpr.text)) {
-                            (imports || (imports = [])).push(moduleNameExpr);
-                        }
-                        break;
-                    case 225 /* ModuleDeclaration */:
-                        if (ts.isAmbientModule(node) && (inAmbientModule || node.flags & 2 /* Ambient */ || ts.isDeclarationFile(file))) {
-                            var moduleName = node.name;
-                            // Ambient module declarations can be interpreted as augmentations for some existing external modules.
-                            // This will happen in two cases:
-                            // - if current file is external module then module augmentation is a ambient module declaration defined in the top level scope
-                            // - if current file is not external module then module augmentation is an ambient module declaration with non-relative module name
-                            //   immediately nested in top level ambient module declaration .
-                            if (isExternalModuleFile || (inAmbientModule && !ts.isExternalModuleNameRelative(moduleName.text))) {
-                                (moduleAugmentations || (moduleAugmentations = [])).push(moduleName);
-                            }
-                            else if (!inAmbientModule) {
-                                // An AmbientExternalModuleDeclaration declares an external module.
-                                // This type of declaration is permitted only in the global module.
-                                // The StringLiteral must specify a top - level external module name.
-                                // Relative external module names are not permitted
-                                // NOTE: body of ambient module is always a module block
-                                for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
-                                    var statement = _a[_i];
-                                    collectModuleReferences(statement, /*inAmbientModule*/ true);
-                                }
-                            }
-                        }
-                }
-            }
-            function collectRequireCalls(node) {
-                if (ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
-                    (imports || (imports = [])).push(node.arguments[0]);
-                }
-                else {
-                    ts.forEachChild(node, collectRequireCalls);
-                }
-            }
-        }
-        /**
-          * 'isReference' indicates whether the file was brought in via a reference directive (rather than an import declaration)
-          */
-        function processSourceFile(fileName, isDefaultLib, isReference, refFile, refPos, refEnd) {
-            var diagnosticArgument;
-            var diagnostic;
-            if (hasExtension(fileName)) {
-                if (!options.allowNonTsExtensions && !ts.forEach(supportedExtensions, function (extension) { return ts.fileExtensionIs(host.getCanonicalFileName(fileName), extension); })) {
-                    diagnostic = ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1;
-                    diagnosticArgument = [fileName, "'" + supportedExtensions.join("', '") + "'"];
-                }
-                else if (!findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd)) {
-                    diagnostic = ts.Diagnostics.File_0_not_found;
-                    diagnosticArgument = [fileName];
-                }
-                else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
-                    diagnostic = ts.Diagnostics.A_file_cannot_have_a_reference_to_itself;
-                    diagnosticArgument = [fileName];
-                }
-            }
-            else {
-                var nonTsFile = options.allowNonTsExtensions && findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd);
-                if (!nonTsFile) {
-                    if (options.allowNonTsExtensions) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        diagnosticArgument = [fileName];
-                    }
-                    else if (!ts.forEach(supportedExtensions, function (extension) { return findSourceFile(fileName + extension, ts.toPath(fileName + extension, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd); })) {
-                        diagnostic = ts.Diagnostics.File_0_not_found;
-                        fileName += ".ts";
-                        diagnosticArgument = [fileName];
-                    }
-                }
-            }
-            if (diagnostic) {
-                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
-                    fileProcessingDiagnostics.add(ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(diagnosticArgument)));
-                }
-                else {
-                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(diagnosticArgument)));
-                }
-            }
-        }
-        function reportFileNamesDifferOnlyInCasingError(fileName, existingFileName, refFile, refPos, refEnd) {
-            if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
-                fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
-            }
-            else {
-                fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
-            }
-        }
-        // Get source file from normalized fileName
-        function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) {
-            if (filesByName.contains(path)) {
-                var file_1 = filesByName.get(path);
-                // try to check if we've already seen this file but with a different casing in path
-                // NOTE: this only makes sense for case-insensitive file systems
-                if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
-                    reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
-                }
-                return file_1;
-            }
-            // We haven't looked for this file, do so now and cache result
-            var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
-                if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
-                    fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
-                }
-                else {
-                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
-                }
-            });
-            filesByName.set(path, file);
-            if (file) {
-                file.path = path;
-                if (host.useCaseSensitiveFileNames()) {
-                    // for case-sensitive file systems check if we've already seen some file with similar filename ignoring case
-                    var existingFile = filesByNameIgnoreCase.get(path);
-                    if (existingFile) {
-                        reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd);
-                    }
-                    else {
-                        filesByNameIgnoreCase.set(path, file);
-                    }
-                }
-                skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
-                var basePath = ts.getDirectoryPath(fileName);
-                if (!options.noResolve) {
-                    processReferencedFiles(file, basePath, isDefaultLib);
-                    processTypeReferenceDirectives(file);
-                }
-                // always process imported modules to record module name resolutions
-                processImportedModules(file, basePath);
-                if (isDefaultLib) {
-                    files.unshift(file);
-                }
-                else {
-                    files.push(file);
-                }
-            }
-            return file;
-        }
-        function processReferencedFiles(file, basePath, isDefaultLib) {
-            ts.forEach(file.referencedFiles, function (ref) {
-                var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
-                processSourceFile(referencedFileName, isDefaultLib, /*isReference*/ true, file, ref.pos, ref.end);
-            });
-        }
-        function processTypeReferenceDirectives(file) {
-            var typeDirectives = ts.map(file.typeReferenceDirectives, function (l) { return l.fileName; });
-            var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeDirectives, file.fileName);
-            for (var i = 0; i < typeDirectives.length; i++) {
-                var ref = file.typeReferenceDirectives[i];
-                var resolvedTypeReferenceDirective = resolutions[i];
-                // store resolved type directive on the file
-                ts.setResolvedTypeReferenceDirective(file, ref.fileName, resolvedTypeReferenceDirective);
-                processTypeReferenceDirective(ref.fileName, resolvedTypeReferenceDirective, file, ref.pos, ref.end);
-            }
-        }
-        function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
-            // If we already found this library as a primary reference - nothing to do
-            var previousResolution = resolvedTypeReferenceDirectives[typeReferenceDirective];
-            if (previousResolution && previousResolution.primary) {
-                return;
-            }
-            var saveResolution = true;
-            if (resolvedTypeReferenceDirective) {
-                if (resolvedTypeReferenceDirective.primary) {
-                    // resolved from the primary path
-                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
-                }
-                else {
-                    // If we already resolved to this file, it must have been a secondary reference. Check file contents
-                    // for sameness and possibly issue an error
-                    if (previousResolution) {
-                        var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
-                        if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
-                            fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
-                        }
-                        // don't overwrite previous resolution result
-                        saveResolution = false;
-                    }
-                    else {
-                        // First resolution of this library
-                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
-                    }
-                }
-            }
-            else {
-                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_name_0, typeReferenceDirective));
-            }
-            if (saveResolution) {
-                resolvedTypeReferenceDirectives[typeReferenceDirective] = resolvedTypeReferenceDirective;
-            }
-        }
-        function createDiagnostic(refFile, refPos, refEnd, message) {
-            var args = [];
-            for (var _i = 4; _i < arguments.length; _i++) {
-                args[_i - 4] = arguments[_i];
-            }
-            if (refFile === undefined || refPos === undefined || refEnd === undefined) {
-                return ts.createCompilerDiagnostic.apply(void 0, [message].concat(args));
-            }
-            else {
-                return ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, message].concat(args));
-            }
-        }
-        function getCanonicalFileName(fileName) {
-            return host.getCanonicalFileName(fileName);
-        }
-        function processImportedModules(file, basePath) {
-            collectExternalModuleReferences(file);
-            if (file.imports.length || file.moduleAugmentations.length) {
-                file.resolvedModules = {};
-                var moduleNames = ts.map(ts.concatenate(file.imports, file.moduleAugmentations), getTextOfLiteral);
-                var resolutions = resolveModuleNamesWorker(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory));
-                for (var i = 0; i < moduleNames.length; i++) {
-                    var resolution = resolutions[i];
-                    ts.setResolvedModule(file, moduleNames[i], resolution);
-                    // add file to program only if:
-                    // - resolution was successful
-                    // - noResolve is falsy
-                    // - module name comes from the list of imports
-                    var shouldAddFile = resolution &&
-                        !options.noResolve &&
-                        i < file.imports.length;
-                    if (shouldAddFile) {
-                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), /*isDefaultLib*/ false, /*isReference*/ false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
-                    }
-                }
-            }
-            else {
-                // no imports - drop cached module resolutions
-                file.resolvedModules = undefined;
-            }
-            return;
-        }
-        function computeCommonSourceDirectory(sourceFiles) {
-            var fileNames = [];
-            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
-                var file = sourceFiles_2[_i];
-                if (!file.isDeclarationFile) {
-                    fileNames.push(file.fileName);
-                }
-            }
-            return computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName);
-        }
-        function checkSourceFilesBelongToPath(sourceFiles, rootDirectory) {
-            var allFilesBelongToPath = true;
-            if (sourceFiles) {
-                var absoluteRootDirectoryPath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(rootDirectory, currentDirectory));
-                for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
-                    var sourceFile = sourceFiles_3[_i];
-                    if (!ts.isDeclarationFile(sourceFile)) {
-                        var absoluteSourceFilePath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
-                        if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
-                            programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
-                            allFilesBelongToPath = false;
-                        }
-                    }
-                }
-            }
-            return allFilesBelongToPath;
-        }
-        function verifyCompilerOptions() {
-            if (options.isolatedModules) {
-                if (options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules"));
-                }
-                if (options.noEmitOnError) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules"));
-                }
-                if (options.out) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules"));
-                }
-                if (options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules"));
-                }
-            }
-            if (options.inlineSourceMap) {
-                if (options.sourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap"));
-                }
-                if (options.mapRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap"));
-                }
-            }
-            if (options.paths && options.baseUrl === undefined) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option));
-            }
-            if (options.paths) {
-                for (var key in options.paths) {
-                    if (!ts.hasProperty(options.paths, key)) {
-                        continue;
-                    }
-                    if (!hasZeroOrOneAsteriskCharacter(key)) {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key));
-                    }
-                    if (ts.isArray(options.paths[key])) {
-                        for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
-                            var subst = _a[_i];
-                            var typeOfSubst = typeof subst;
-                            if (typeOfSubst === "string") {
-                                if (!hasZeroOrOneAsteriskCharacter(subst)) {
-                                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key));
-                                }
-                            }
-                            else {
-                                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst));
-                            }
-                        }
-                    }
-                    else {
-                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
-                    }
-                }
-            }
-            if (options.inlineSources) {
-                if (!options.sourceMap && !options.inlineSourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_inlineSources_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided));
-                }
-                if (options.sourceRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceRoot", "inlineSources"));
-                }
-            }
-            if (options.out && options.outFile) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
-            }
-            if (!options.sourceMap && (options.mapRoot || options.sourceRoot)) {
-                // Error to specify --mapRoot or --sourceRoot without mapSourceFiles
-                if (options.mapRoot) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
-                }
-                if (options.sourceRoot && !options.inlineSourceMap) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "sourceRoot", "sourceMap"));
-                }
-            }
-            if (options.declarationDir) {
-                if (!options.declaration) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration"));
-                }
-                if (options.out || options.outFile) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile"));
-                }
-            }
-            if (options.lib && options.noLib) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib"));
-            }
-            var languageVersion = options.target || 0 /* ES3 */;
-            var outFile = options.outFile || options.out;
-            var firstExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) ? f : undefined; });
-            if (options.isolatedModules) {
-                if (options.module === ts.ModuleKind.None && languageVersion < 2 /* ES6 */) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
-                }
-                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
-                if (firstNonExternalModuleSourceFile) {
-                    var span = ts.getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
-                    programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
-                }
-            }
-            else if (firstExternalModuleSourceFile && languageVersion < 2 /* ES6 */ && options.module === ts.ModuleKind.None) {
-                // We cannot use createDiagnosticFromNode because nodes do not have parents yet
-                var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
-            }
-            // Cannot specify module gen target of es6 when below es6
-            if (options.module === ts.ModuleKind.ES6 && languageVersion < 2 /* ES6 */) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
-            }
-            // Cannot specify module gen that isn't amd or system with --out
-            if (outFile) {
-                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
-                }
-                else if (options.module === undefined && firstExternalModuleSourceFile) {
-                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
-                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
-                }
-            }
-            // there has to be common source directory if user specified --outdir || --sourceRoot
-            // if user specified --mapRoot, there needs to be common source directory if there would be multiple files being emitted
-            if (options.outDir ||
-                options.sourceRoot ||
-                options.mapRoot) {
-                // Precalculate and cache the common source directory
-                var dir = getCommonSourceDirectory();
-                // If we failed to find a good common directory, but outDir is specified and at least one of our files is on a windows drive/URL/other resource, add a failure
-                if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
-                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files));
-                }
-            }
-            if (!options.noEmit && options.allowJs && options.declaration) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration"));
-            }
-            if (options.emitDecoratorMetadata &&
-                !options.experimentalDecorators) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators"));
-            }
-            if (options.reactNamespace && !ts.isIdentifier(options.reactNamespace, languageVersion)) {
-                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace));
-            }
-            // If the emit is enabled make sure that every output file is unique and not overwriting any of the input files
-            if (!options.noEmit && !options.suppressOutputPathCheck) {
-                var emitHost = getEmitHost();
-                var emitFilesSeen_1 = ts.createFileMap(!host.useCaseSensitiveFileNames() ? function (key) { return key.toLocaleLowerCase(); } : undefined);
-                ts.forEachExpectedEmitFile(emitHost, function (emitFileNames, sourceFiles, isBundledEmit) {
-                    verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen_1);
-                    verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
-                });
-            }
-            // Verify that all the emit files are unique and don't overwrite input files
-            function verifyEmitFilePath(emitFileName, emitFilesSeen) {
-                if (emitFileName) {
-                    var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName);
-                    // Report error if the output overwrites input file
-                    if (filesByName.contains(emitFilePath)) {
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file);
-                    }
-                    // Report error if multiple files write into same file
-                    if (emitFilesSeen.contains(emitFilePath)) {
-                        // Already seen the same emit file - report error
-                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files);
-                    }
-                    else {
-                        emitFilesSeen.set(emitFilePath, true);
-                    }
-                }
-            }
-        }
-        function createEmitBlockingDiagnostics(emitFileName, emitFilePath, message) {
-            hasEmitBlockingDiagnostics.set(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName), true);
-            programDiagnostics.add(ts.createCompilerDiagnostic(message, emitFileName));
-        }
-    }
-    ts.createProgram = createProgram;
-})(ts || (ts = {}));
-/// <reference path="sys.ts"/>
-/// <reference path="types.ts"/>
-/// <reference path="core.ts"/>
-/// <reference path="diagnosticInformationMap.generated.ts"/>
-/// <reference path="scanner.ts"/>
-var ts;
-(function (ts) {
-    /* @internal */
-    ts.optionDeclarations = [
-        {
-            name: "charset",
-            type: "string"
-        },
-        {
-            name: "declaration",
-            shortName: "d",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_d_ts_file
-        },
-        {
-            name: "declarationDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "diagnostics",
-            type: "boolean"
-        },
-        {
-            name: "emitBOM",
-            type: "boolean"
-        },
-        {
-            name: "help",
-            shortName: "h",
-            type: "boolean",
-            description: ts.Diagnostics.Print_this_message
-        },
-        {
-            name: "help",
-            shortName: "?",
-            type: "boolean"
-        },
-        {
-            name: "init",
-            type: "boolean",
-            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file
-        },
-        {
-            name: "inlineSourceMap",
-            type: "boolean"
-        },
-        {
-            name: "inlineSources",
-            type: "boolean"
-        },
-        {
-            name: "jsx",
-            type: {
-                "preserve": 1 /* Preserve */,
-                "react": 2 /* React */
-            },
-            paramType: ts.Diagnostics.KIND,
-            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_or_react
-        },
-        {
-            name: "reactNamespace",
-            type: "string",
-            description: ts.Diagnostics.Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit
-        },
-        {
-            name: "listFiles",
-            type: "boolean"
-        },
-        {
-            name: "locale",
-            type: "string"
-        },
-        {
-            name: "mapRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
-            paramType: ts.Diagnostics.LOCATION
-        },
-        {
-            name: "module",
-            shortName: "m",
-            type: {
-                "none": ts.ModuleKind.None,
-                "commonjs": ts.ModuleKind.CommonJS,
-                "amd": ts.ModuleKind.AMD,
-                "system": ts.ModuleKind.System,
-                "umd": ts.ModuleKind.UMD,
-                "es6": ts.ModuleKind.ES6,
-                "es2015": ts.ModuleKind.ES2015
-            },
-            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
-            paramType: ts.Diagnostics.KIND
-        },
-        {
-            name: "newLine",
-            type: {
-                "crlf": 0 /* CarriageReturnLineFeed */,
-                "lf": 1 /* LineFeed */
-            },
-            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
-            paramType: ts.Diagnostics.NEWLINE
-        },
-        {
-            name: "noEmit",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs
-        },
-        {
-            name: "noEmitHelpers",
-            type: "boolean"
-        },
-        {
-            name: "noEmitOnError",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported
-        },
-        {
-            name: "noImplicitAny",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type
-        },
-        {
-            name: "noImplicitThis",
-            type: "boolean",
-            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type
-        },
-        {
-            name: "noLib",
-            type: "boolean"
-        },
-        {
-            name: "noResolve",
-            type: "boolean"
-        },
-        {
-            name: "skipDefaultLibCheck",
-            type: "boolean"
-        },
-        {
-            name: "skipLibCheck",
-            type: "boolean",
-            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
-        },
-        {
-            name: "out",
-            type: "string",
-            isFilePath: false,
-            // for correct behaviour, please use outFile
-            paramType: ts.Diagnostics.FILE
-        },
-        {
-            name: "outFile",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
-            paramType: ts.Diagnostics.FILE
-        },
-        {
-            name: "outDir",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "preserveConstEnums",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
-        },
-        {
-            name: "pretty",
-            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental,
-            type: "boolean"
-        },
-        {
-            name: "project",
-            shortName: "p",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Compile_the_project_in_the_given_directory,
-            paramType: ts.Diagnostics.DIRECTORY
-        },
-        {
-            name: "removeComments",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_comments_to_output
-        },
-        {
-            name: "rootDir",
-            type: "string",
-            isFilePath: true,
-            paramType: ts.Diagnostics.LOCATION,
-            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir
-        },
-        {
-            name: "isolatedModules",
-            type: "boolean"
-        },
-        {
-            name: "sourceMap",
-            type: "boolean",
-            description: ts.Diagnostics.Generates_corresponding_map_file
-        },
-        {
-            name: "sourceRoot",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
-            paramType: ts.Diagnostics.LOCATION
-        },
-        {
-            name: "suppressExcessPropertyErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
-            experimental: true
-        },
-        {
-            name: "suppressImplicitAnyIndexErrors",
-            type: "boolean",
-            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures
-        },
-        {
-            name: "stripInternal",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
-            experimental: true
-        },
-        {
-            name: "target",
-            shortName: "t",
-            type: {
-                "es3": 0 /* ES3 */,
-                "es5": 1 /* ES5 */,
-                "es6": 2 /* ES6 */,
-                "es2015": 2 /* ES2015 */
-            },
-            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
-            paramType: ts.Diagnostics.VERSION
-        },
-        {
-            name: "version",
-            shortName: "v",
-            type: "boolean",
-            description: ts.Diagnostics.Print_the_compiler_s_version
-        },
-        {
-            name: "watch",
-            shortName: "w",
-            type: "boolean",
-            description: ts.Diagnostics.Watch_input_files
-        },
-        {
-            name: "experimentalDecorators",
-            type: "boolean",
-            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
-        },
-        {
-            name: "emitDecoratorMetadata",
-            type: "boolean",
-            experimental: true,
-            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
-        },
-        {
-            name: "moduleResolution",
-            type: {
-                "node": ts.ModuleResolutionKind.NodeJs,
-                "classic": ts.ModuleResolutionKind.Classic
-            },
-            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6
-        },
-        {
-            name: "allowUnusedLabels",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
-        },
-        {
-            name: "noImplicitReturns",
-            type: "boolean",
-            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
-        },
-        {
-            name: "noFallthroughCasesInSwitch",
-            type: "boolean",
-            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
-        },
-        {
-            name: "allowUnreachableCode",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
-        },
-        {
-            name: "forceConsistentCasingInFileNames",
-            type: "boolean",
-            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
-        },
-        {
-            name: "baseUrl",
-            type: "string",
-            isFilePath: true,
-            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
-        },
-        {
-            // this option can only be specified in tsconfig.json
-            // use type = object to copy the value as-is
-            name: "paths",
-            type: "object",
-            isTSConfigOnly: true
-        },
-        {
-            // this option can only be specified in tsconfig.json
-            // use type = object to copy the value as-is
-            name: "rootDirs",
-            type: "list",
-            isTSConfigOnly: true,
-            element: {
-                name: "rootDirs",
-                type: "string",
-                isFilePath: true
-            }
-        },
-        {
-            name: "typesSearchPaths",
-            type: "list",
-            isTSConfigOnly: true,
-            element: {
-                name: "typesSearchPaths",
-                type: "string",
-                isFilePath: true
-            }
-        },
-        {
-            name: "typesRoot",
-            type: "string"
-        },
-        {
-            name: "types",
-            type: "list",
-            element: {
-                name: "types",
-                type: "string"
-            },
-            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
-        },
-        {
-            name: "traceResolution",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
-        },
-        {
-            name: "allowJs",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
-        },
-        {
-            name: "allowSyntheticDefaultImports",
-            type: "boolean",
-            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
-        },
-        {
-            name: "noImplicitUseStrict",
-            type: "boolean",
-            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
-        },
-        {
-            name: "listEmittedFiles",
-            type: "boolean"
-        },
-        {
-            name: "lib",
-            type: "list",
-            element: {
-                name: "lib",
-                type: {
-                    // JavaScript only
-                    "es5": "lib.es5.d.ts",
-                    "es6": "lib.es2015.d.ts",
-                    "es2015": "lib.es2015.d.ts",
-                    "es7": "lib.es2016.d.ts",
-                    "es2016": "lib.es2016.d.ts",
-                    "es2017": "lib.es2017.d.ts",
-                    // Host only
-                    "dom": "lib.dom.d.ts",
-                    "webworker": "lib.webworker.d.ts",
-                    "scripthost": "lib.scripthost.d.ts",
-                    // ES2015 Or ESNext By-feature options
-                    "es2015.core": "lib.es2015.core.d.ts",
-                    "es2015.collection": "lib.es2015.collection.d.ts",
-                    "es2015.generator": "lib.es2015.generator.d.ts",
-                    "es2015.iterable": "lib.es2015.iterable.d.ts",
-                    "es2015.promise": "lib.es2015.promise.d.ts",
-                    "es2015.proxy": "lib.es2015.proxy.d.ts",
-                    "es2015.reflect": "lib.es2015.reflect.d.ts",
-                    "es2015.symbol": "lib.es2015.symbol.d.ts",
-                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
-                    "es2016.array.include": "lib.es2016.array.include.d.ts",
-                    "es2017.object": "lib.es2017.object.d.ts"
-                }
-            },
-            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
-        },
-        {
-            name: "strictNullChecks",
-            type: "boolean",
-            description: ts.Diagnostics.Enable_strict_null_checks
-        }
-    ];
-    /* @internal */
-    ts.typingOptionDeclarations = [
-        {
-            name: "enableAutoDiscovery",
-            type: "boolean"
-        },
-        {
-            name: "include",
-            type: "list",
-            element: {
-                name: "include",
-                type: "string"
-            }
-        },
-        {
-            name: "exclude",
-            type: "list",
-            element: {
-                name: "exclude",
-                type: "string"
-            }
-        }
-    ];
-    var optionNameMapCache;
-    /* @internal */
-    function getOptionNameMap() {
-        if (optionNameMapCache) {
-            return optionNameMapCache;
-        }
-        var optionNameMap = {};
-        var shortOptionNames = {};
-        ts.forEach(ts.optionDeclarations, function (option) {
-            optionNameMap[option.name.toLowerCase()] = option;
-            if (option.shortName) {
-                shortOptionNames[option.shortName] = option.name;
-            }
-        });
-        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
-        return optionNameMapCache;
-    }
-    ts.getOptionNameMap = getOptionNameMap;
-    /* @internal */
-    function createCompilerDiagnosticForInvalidCustomType(opt) {
-        var namesOfType = [];
-        ts.forEachKey(opt.type, function (key) {
-            namesOfType.push(" '" + key + "'");
-        });
-        return ts.createCompilerDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
-    }
-    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
-    /* @internal */
-    function parseCustomTypeOption(opt, value, errors) {
-        var key = trimString((value || "")).toLowerCase();
-        var map = opt.type;
-        if (ts.hasProperty(map, key)) {
-            return map[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
-    }
-    ts.parseCustomTypeOption = parseCustomTypeOption;
-    /* @internal */
-    function parseListTypeOption(opt, value, errors) {
-        var values = trimString((value || "")).split(",");
-        switch (opt.element.type) {
-            case "number":
-                return ts.map(values, parseInt);
-            case "string":
-                return ts.map(values, function (v) { return v || ""; });
-            default:
-                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
-        }
-    }
-    ts.parseListTypeOption = parseListTypeOption;
-    /* @internal */
-    function parseCommandLine(commandLine, readFile) {
-        var options = {};
-        var fileNames = [];
-        var errors = [];
-        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
-        parseStrings(commandLine);
-        return {
-            options: options,
-            fileNames: fileNames,
-            errors: errors
-        };
-        function parseStrings(args) {
-            var i = 0;
-            while (i < args.length) {
-                var s = args[i];
-                i++;
-                if (s.charCodeAt(0) === 64 /* at */) {
-                    parseResponseFile(s.slice(1));
-                }
-                else if (s.charCodeAt(0) === 45 /* minus */) {
-                    s = s.slice(s.charCodeAt(1) === 45 /* minus */ ? 2 : 1).toLowerCase();
-                    // Try to translate short option names to their full equivalents.
-                    if (ts.hasProperty(shortOptionNames, s)) {
-                        s = shortOptionNames[s];
-                    }
-                    if (ts.hasProperty(optionNameMap, s)) {
-                        var opt = optionNameMap[s];
-                        if (opt.isTSConfigOnly) {
-                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
-                        }
-                        else {
-                            // Check to see if no argument was provided (e.g. "--locale" is the last command-line argument).
-                            if (!args[i] && opt.type !== "boolean") {
-                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
-                            }
-                            switch (opt.type) {
-                                case "number":
-                                    options[opt.name] = parseInt(args[i]);
-                                    i++;
-                                    break;
-                                case "boolean":
-                                    options[opt.name] = true;
-                                    break;
-                                case "string":
-                                    options[opt.name] = args[i] || "";
-                                    i++;
-                                    break;
-                                case "list":
-                                    options[opt.name] = parseListTypeOption(opt, args[i], errors);
-                                    i++;
-                                    break;
-                                // If not a primitive, the possible types are specified in what is effectively a map of options.
-                                default:
-                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
-                                    i++;
-                                    break;
-                            }
-                        }
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
-                    }
-                }
-                else {
-                    fileNames.push(s);
-                }
-            }
-        }
-        function parseResponseFile(fileName) {
-            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
-            if (!text) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
-                return;
-            }
-            var args = [];
-            var pos = 0;
-            while (true) {
-                while (pos < text.length && text.charCodeAt(pos) <= 32 /* space */)
-                    pos++;
-                if (pos >= text.length)
-                    break;
-                var start = pos;
-                if (text.charCodeAt(start) === 34 /* doubleQuote */) {
-                    pos++;
-                    while (pos < text.length && text.charCodeAt(pos) !== 34 /* doubleQuote */)
-                        pos++;
-                    if (pos < text.length) {
-                        args.push(text.substring(start + 1, pos));
-                        pos++;
-                    }
-                    else {
-                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
-                    }
-                }
-                else {
-                    while (text.charCodeAt(pos) > 32 /* space */)
-                        pos++;
-                    args.push(text.substring(start, pos));
-                }
-            }
-            parseStrings(args);
-        }
-    }
-    ts.parseCommandLine = parseCommandLine;
-    /**
-      * Read tsconfig.json file
-      * @param fileName The path to the config file
-      */
-    function readConfigFile(fileName, readFile) {
-        var text = "";
-        try {
-            text = readFile(fileName);
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
-        }
-        return parseConfigFileTextToJson(fileName, text);
-    }
-    ts.readConfigFile = readConfigFile;
-    /**
-      * Parse the text of the tsconfig.json file
-      * @param fileName The path to the config file
-      * @param jsonText The text of the config file
-      */
-    function parseConfigFileTextToJson(fileName, jsonText) {
-        try {
-            var jsonTextWithoutComments = removeComments(jsonText);
-            return { config: /\S/.test(jsonTextWithoutComments) ? JSON.parse(jsonTextWithoutComments) : {} };
-        }
-        catch (e) {
-            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) };
-        }
-    }
-    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
-    /**
-     * Remove the comments from a json like text.
-     * Comments can be single line comments (starting with # or //) or multiline comments using / * * /
-     *
-     * This method replace comment content by whitespace rather than completely remove them to keep positions in json parsing error reporting accurate.
-     */
-    function removeComments(jsonText) {
-        var output = "";
-        var scanner = ts.createScanner(1 /* ES5 */, /* skipTrivia */ false, 0 /* Standard */, jsonText);
-        var token;
-        while ((token = scanner.scan()) !== 1 /* EndOfFileToken */) {
-            switch (token) {
-                case 2 /* SingleLineCommentTrivia */:
-                case 3 /* MultiLineCommentTrivia */:
-                    // replace comments with whitespace to preserve original character positions
-                    output += scanner.getTokenText().replace(/\S/g, " ");
-                    break;
-                default:
-                    output += scanner.getTokenText();
-                    break;
-            }
-        }
-        return output;
-    }
-    // Skip over any minified JavaScript files (ending in ".min.js")
-    // Skip over dotted files and folders as well
-    var IgnoreFileNamePattern = /(\.min\.js$)|([\\/]\.[\w.])/;
-    /**
-      * Parse the contents of a config file (tsconfig.json).
-      * @param json The contents of the config file to parse
-      * @param host Instance of ParseConfigHost used to enumerate files in folder.
-      * @param basePath A root directory to resolve relative path entries in the config
-      *    file to. e.g. outDir
-      */
-    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName) {
-        if (existingOptions === void 0) { existingOptions = {}; }
-        var errors = [];
-        var compilerOptions = convertCompilerOptionsFromJsonWorker(json["compilerOptions"], basePath, errors, configFileName);
-        var options = ts.extend(existingOptions, compilerOptions);
-        var typingOptions = convertTypingOptionsFromJsonWorker(json["typingOptions"], basePath, errors, configFileName);
-        options.configFilePath = configFileName;
-        var fileNames = getFileNames(errors);
-        return {
-            options: options,
-            fileNames: fileNames,
-            typingOptions: typingOptions,
-            raw: json,
-            errors: errors
-        };
-        function getFileNames(errors) {
-            var fileNames = [];
-            if (ts.hasProperty(json, "files")) {
-                if (ts.isArray(json["files"])) {
-                    fileNames = ts.map(json["files"], function (s) { return ts.combinePaths(basePath, s); });
-                }
-                else {
-                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
-                }
-            }
-            else {
-                var filesSeen = {};
-                var exclude = [];
-                if (ts.isArray(json["exclude"])) {
-                    exclude = json["exclude"];
-                }
-                else {
-                    // by default exclude node_modules, and any specificied output directory
-                    exclude = ["node_modules", "bower_components", "jspm_packages"];
-                }
-                var outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
-                if (outDir) {
-                    exclude.push(outDir);
-                }
-                exclude = ts.map(exclude, ts.normalizeSlashes);
-                var supportedExtensions = ts.getSupportedExtensions(options);
-                ts.Debug.assert(ts.indexOf(supportedExtensions, ".ts") < ts.indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
-                // Get files of supported extensions in their order of resolution
-                for (var _i = 0, supportedExtensions_1 = supportedExtensions; _i < supportedExtensions_1.length; _i++) {
-                    var extension = supportedExtensions_1[_i];
-                    var filesInDirWithExtension = host.readDirectory(basePath, extension, exclude);
-                    for (var _a = 0, filesInDirWithExtension_1 = filesInDirWithExtension; _a < filesInDirWithExtension_1.length; _a++) {
-                        var fileName = filesInDirWithExtension_1[_a];
-                        // .ts extension would read the .d.ts extension files too but since .d.ts is lower priority extension,
-                        // lets pick them when its turn comes up
-                        if (extension === ".ts" && ts.fileExtensionIs(fileName, ".d.ts")) {
-                            continue;
-                        }
-                        if (IgnoreFileNamePattern.test(fileName)) {
-                            continue;
-                        }
-                        // If this is one of the output extension (which would be .d.ts and .js if we are allowing compilation of js files)
-                        // do not include this file if we included .ts or .tsx file with same base name as it could be output of the earlier compilation
-                        if (extension === ".d.ts" || (options.allowJs && ts.contains(ts.supportedJavascriptExtensions, extension))) {
-                            var baseName = fileName.substr(0, fileName.length - extension.length);
-                            if (ts.hasProperty(filesSeen, baseName + ".ts") || ts.hasProperty(filesSeen, baseName + ".tsx")) {
-                                continue;
-                            }
-                        }
-                        filesSeen[fileName] = true;
-                        fileNames.push(fileName);
-                    }
-                }
-            }
-            if (ts.hasProperty(json, "excludes") && !ts.hasProperty(json, "exclude")) {
-                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
-            }
-            return fileNames;
-        }
-    }
-    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
-    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
-    }
-    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
-    function convertTypingOptionsFromJson(jsonOptions, basePath, configFileName) {
-        var errors = [];
-        var options = convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
-        return { options: options, errors: errors };
-    }
-    ts.convertTypingOptionsFromJson = convertTypingOptionsFromJson;
-    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json" ? { allowJs: true } : {};
-        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
-        return options;
-    }
-    function convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
-        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
-            ? { enableAutoDiscovery: true, include: [], exclude: [] }
-            : { enableAutoDiscovery: false, include: [], exclude: [] };
-        convertOptionsFromJson(ts.typingOptionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_typing_option_0, errors);
-        return options;
-    }
-    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
-        if (!jsonOptions) {
-            return;
-        }
-        var optionNameMap = ts.arrayToMap(optionDeclarations, function (opt) { return opt.name; });
-        for (var id in jsonOptions) {
-            if (ts.hasProperty(optionNameMap, id)) {
-                var opt = optionNameMap[id];
-                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
-            }
-            else {
-                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
-            }
-        }
-    }
-    function convertJsonOption(opt, value, basePath, errors) {
-        var optType = opt.type;
-        var expectedType = typeof optType === "string" ? optType : "string";
-        if (optType === "list" && ts.isArray(value)) {
-            return convertJsonOptionOfListType(opt, value, basePath, errors);
-        }
-        else if (typeof value === expectedType) {
-            if (typeof optType !== "string") {
-                return convertJsonOptionOfCustomType(opt, value, errors);
-            }
-            else {
-                if (opt.isFilePath) {
-                    value = ts.normalizePath(ts.combinePaths(basePath, value));
-                    if (value === "") {
-                        value = ".";
-                    }
-                }
-            }
-            return value;
-        }
-        else {
-            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, expectedType));
-        }
-    }
-    function convertJsonOptionOfCustomType(opt, value, errors) {
-        var key = value.toLowerCase();
-        if (ts.hasProperty(opt.type, key)) {
-            return opt.type[key];
-        }
-        else {
-            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
-        }
-    }
-    function convertJsonOptionOfListType(option, values, basePath, errors) {
-        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
-    }
-    function trimString(s) {
-        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
-    }
-})(ts || (ts = {}));
-/* @internal */
-var ts;
-(function (ts) {
-    var OutliningElementsCollector;
-    (function (OutliningElementsCollector) {
-        function collectElements(sourceFile) {
-            var elements = [];
-            var collapseText = "...";
-            function addOutliningSpan(hintSpanNode, startElement, endElement, autoCollapse) {
-                if (hintSpanNode && startElement && endElement) {
-                    var span = {
-                        textSpan: ts.createTextSpanFromBounds(startElement.pos, endElement.end),
-                        hintSpan: ts.createTextSpanFromBounds(hintSpanNode.getStart(), hintSpanNode.end),
-                        bannerText: collapseText,
-                        autoCollapse: autoCollapse
-                    };
-                    elements.push(span);
-                }
-            }
-            function addOutliningSpanComments(commentSpan, autoCollapse) {
-                if (commentSpan) {
-                    var span = {
-                        textSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
-                        hintSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
-                        bannerText: collapseText,
-                        autoCollapse: autoCollapse
-                    };
-                    elements.push(span);
-                }
-            }
-            function addOutliningForLeadingCommentsForNode(n) {
-                var comments = ts.getLeadingCommentRangesOfNode(n, sourceFile);
-                if (comments) {
-                    var firstSingleLineCommentStart = -1;
-                    var lastSingleLineCommentEnd = -1;
-                    var isFirstSingleLineComment = true;
-                    var singleLineCommentCount = 0;
-                    for (var _i = 0, comments_2 = comments; _i < comments_2.length; _i++) {
-                        var currentComment = comments_2[_i];
-                        // For single line comments, combine consecutive ones (2 or more) into
-                        // a single span from the start of the first till the end of the last
-                        if (currentComment.kind === 2 /* SingleLineCommentTrivia */) {
-                            if (isFirstSingleLineComment) {
-                                firstSingleLineCommentStart = currentComment.pos;
-                            }
-                            isFirstSingleLineComment = false;
-                            lastSingleLineCommentEnd = currentComment.end;
-                            singleLineCommentCount++;
-                        }
-                        else if (currentComment.kind === 3 /* MultiLineCommentTrivia */) {
-                            combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
-                            addOutliningSpanComments(currentComment, /*autoCollapse*/ false);
-                            singleLineCommentCount = 0;
-                            lastSingleLineCommentEnd = -1;
-                            isFirstSingleLineComment = true;
-                        }
-                    }
-                    combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
-                }
-            }
-            function combineAndAddMultipleSingleLineComments(count, start, end) {
-                // Only outline spans of two or more consecutive single line comments
-                if (count > 1) {
-                    var multipleSingleLineComments = {
-                        pos: start,
-                        end: end,
-                        kind: 2 /* SingleLineCommentTrivia */
-                    };
-                    addOutliningSpanComments(multipleSingleLineComments, /*autoCollapse*/ false);
-                }
-            }
-            function autoCollapse(node) {
-                return ts.isFunctionBlock(node) && node.parent.kind !== 180 /* ArrowFunction */;
-            }
-            var depth = 0;
-            var maxDepth = 20;
-            function walk(n) {
-                if (depth > maxDepth) {
-                    return;
-                }
-                if (ts.isDeclaration(n)) {
-                    addOutliningForLeadingCommentsForNode(n);
-                }
-                switch (n.kind) {
-                    case 199 /* Block */:
-                        if (!ts.isFunctionBlock(n)) {
-                            var parent_14 = n.parent;
-                            var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
-                            var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
-                            // Check if the block is standalone, or 'attached' to some parent statement.
-                            // If the latter, we want to collapse the block, but consider its hint span
-                            // to be the entire span of the parent.
-                            if (parent_14.kind === 204 /* DoStatement */ ||
-                                parent_14.kind === 207 /* ForInStatement */ ||
-                                parent_14.kind === 208 /* ForOfStatement */ ||
-                                parent_14.kind === 206 /* ForStatement */ ||
-                                parent_14.kind === 203 /* IfStatement */ ||
-                                parent_14.kind === 205 /* WhileStatement */ ||
-                                parent_14.kind === 212 /* WithStatement */ ||
-                                parent_14.kind === 252 /* CatchClause */) {
-                                addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
-                                break;
-                            }
-                            if (parent_14.kind === 216 /* TryStatement */) {
-                                // Could be the try-block, or the finally-block.
-                                var tryStatement = parent_14;
-                                if (tryStatement.tryBlock === n) {
-                                    addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
-                                    break;
-                                }
-                                else if (tryStatement.finallyBlock === n) {
-                                    var finallyKeyword = ts.findChildOfKind(tryStatement, 85 /* FinallyKeyword */, sourceFile);
-                                    if (finallyKeyword) {
-                                        addOutliningSpan(finallyKeyword, openBrace, closeBrace, autoCollapse(n));
-                                        break;
-                                    }
-                                }
-                            }
-                            // Block was a standalone block.  In this case we want to only collapse
-                            // the span of the block, independent of any parent span.
-                            var span = ts.createTextSpanFromBounds(n.getStart(), n.end);
-                            elements.push({
-                                textSpan: span,
-                                hintSpan: span,
-                                bannerText: collapseText,
-                                autoCollapse: autoCollapse(n)
-                            });
-                            break;
-                        }
-                    // Fallthrough.
-                    case 226 /* ModuleBlock */: {
-                        var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
-                        var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
-                        addOutliningSpan(n.parent, openBrace, closeBrace, autoCollapse(n));
-                        break;
-                    }
-                    case 221 /* ClassDeclaration */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 171 /* ObjectLiteralExpression */:
-                    case 227 /* CaseBlock */: {
-                        var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
-                        var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
-                        addOutliningSpan(n, openBrace, closeBrace, autoCollapse(n));
-                        break;
-                    }
-                    case 170 /* ArrayLiteralExpression */:
-                        var openBracket = ts.findChildOfKind(n, 19 /* OpenBracketToken */, sourceFile);
-                        var closeBracket = ts.findChildOfKind(n, 20 /* CloseBracketToken */, sourceFile);
-                        addOutliningSpan(n, openBracket, closeBracket, autoCollapse(n));
-                        break;
-                }
-                depth++;
-                ts.forEachChild(n, walk);
-                depth--;
-            }
-            walk(sourceFile);
-            return elements;
-        }
-        OutliningElementsCollector.collectElements = collectElements;
-    })(OutliningElementsCollector = ts.OutliningElementsCollector || (ts.OutliningElementsCollector = {}));
-})(ts || (ts = {}));
-/* @internal */
-var ts;
-(function (ts) {
-    var NavigateTo;
-    (function (NavigateTo) {
-        function getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount) {
-            var patternMatcher = ts.createPatternMatcher(searchValue);
-            var rawItems = [];
-            // This means "compare in a case insensitive manner."
-            var baseSensitivity = { sensitivity: "base" };
-            // Search the declarations in all files and output matched NavigateToItem into array of NavigateToItem[] 
-            ts.forEach(program.getSourceFiles(), function (sourceFile) {
-                cancellationToken.throwIfCancellationRequested();
-                var nameToDeclarations = sourceFile.getNamedDeclarations();
-                for (var name_34 in nameToDeclarations) {
-                    var declarations = ts.getProperty(nameToDeclarations, name_34);
-                    if (declarations) {
-                        // First do a quick check to see if the name of the declaration matches the 
-                        // last portion of the (possibly) dotted name they're searching for.
-                        var matches = patternMatcher.getMatchesForLastSegmentOfPattern(name_34);
-                        if (!matches) {
-                            continue;
-                        }
-                        for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
-                            var declaration = declarations_7[_i];
-                            // It was a match!  If the pattern has dots in it, then also see if the 
-                            // declaration container matches as well.
-                            if (patternMatcher.patternContainsDots) {
-                                var containers = getContainers(declaration);
-                                if (!containers) {
-                                    return undefined;
-                                }
-                                matches = patternMatcher.getMatches(containers, name_34);
-                                if (!matches) {
-                                    continue;
-                                }
-                            }
-                            var fileName = sourceFile.fileName;
-                            var matchKind = bestMatchKind(matches);
-                            rawItems.push({ name: name_34, fileName: fileName, matchKind: matchKind, isCaseSensitive: allMatchesAreCaseSensitive(matches), declaration: declaration });
-                        }
-                    }
-                }
-            });
-            // Remove imports when the imported declaration is already in the list and has the same name.
-            rawItems = ts.filter(rawItems, function (item) {
-                var decl = item.declaration;
-                if (decl.kind === 231 /* ImportClause */ || decl.kind === 234 /* ImportSpecifier */ || decl.kind === 229 /* ImportEqualsDeclaration */) {
-                    var importer = checker.getSymbolAtLocation(decl.name);
-                    var imported = checker.getAliasedSymbol(importer);
-                    return importer.name !== imported.name;
-                }
-                else {
-                    return true;
-                }
-            });
-            rawItems.sort(compareNavigateToItems);
-            if (maxResultCount !== undefined) {
-                rawItems = rawItems.slice(0, maxResultCount);
-            }
-            var items = ts.map(rawItems, createNavigateToItem);
-            return items;
-            function allMatchesAreCaseSensitive(matches) {
-                ts.Debug.assert(matches.length > 0);
-                // This is a case sensitive match, only if all the submatches were case sensitive.
-                for (var _i = 0, matches_1 = matches; _i < matches_1.length; _i++) {
-                    var match = matches_1[_i];
-                    if (!match.isCaseSensitive) {
-                        return false;
-                    }
-                }
-                return true;
-            }
-            function getTextOfIdentifierOrLiteral(node) {
-                if (node) {
-                    if (node.kind === 69 /* Identifier */ ||
-                        node.kind === 9 /* StringLiteral */ ||
-                        node.kind === 8 /* NumericLiteral */) {
-                        return node.text;
-                    }
-                }
-                return undefined;
-            }
-            function tryAddSingleDeclarationName(declaration, containers) {
-                if (declaration && declaration.name) {
-                    var text = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (text !== undefined) {
-                        containers.unshift(text);
-                    }
-                    else if (declaration.name.kind === 140 /* ComputedPropertyName */) {
-                        return tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ true);
-                    }
-                    else {
-                        // Don't know how to add this.
-                        return false;
-                    }
-                }
-                return true;
-            }
-            // Only added the names of computed properties if they're simple dotted expressions, like:
-            //
-            //      [X.Y.Z]() { }
-            function tryAddComputedPropertyName(expression, containers, includeLastPortion) {
-                var text = getTextOfIdentifierOrLiteral(expression);
-                if (text !== undefined) {
-                    if (includeLastPortion) {
-                        containers.unshift(text);
-                    }
-                    return true;
-                }
-                if (expression.kind === 172 /* PropertyAccessExpression */) {
-                    var propertyAccess = expression;
-                    if (includeLastPortion) {
-                        containers.unshift(propertyAccess.name.text);
-                    }
-                    return tryAddComputedPropertyName(propertyAccess.expression, containers, /*includeLastPortion*/ true);
-                }
-                return false;
-            }
-            function getContainers(declaration) {
-                var containers = [];
-                // First, if we started with a computed property name, then add all but the last
-                // portion into the container array.
-                if (declaration.name.kind === 140 /* ComputedPropertyName */) {
-                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ false)) {
-                        return undefined;
-                    }
-                }
-                // Now, walk up our containers, adding all their names to the container array.
-                declaration = ts.getContainerNode(declaration);
-                while (declaration) {
-                    if (!tryAddSingleDeclarationName(declaration, containers)) {
-                        return undefined;
-                    }
-                    declaration = ts.getContainerNode(declaration);
-                }
-                return containers;
-            }
-            function bestMatchKind(matches) {
-                ts.Debug.assert(matches.length > 0);
-                var bestMatchKind = ts.PatternMatchKind.camelCase;
-                for (var _i = 0, matches_2 = matches; _i < matches_2.length; _i++) {
-                    var match = matches_2[_i];
-                    var kind = match.kind;
-                    if (kind < bestMatchKind) {
-                        bestMatchKind = kind;
-                    }
-                }
-                return bestMatchKind;
-            }
-            function compareNavigateToItems(i1, i2) {
-                // TODO(cyrusn): get the gamut of comparisons that VS already uses here.
-                // Right now we just sort by kind first, and then by name of the item.
-                // We first sort case insensitively.  So "Aaa" will come before "bar".
-                // Then we sort case sensitively, so "aaa" will come before "Aaa".
-                return i1.matchKind - i2.matchKind ||
-                    i1.name.localeCompare(i2.name, undefined, baseSensitivity) ||
-                    i1.name.localeCompare(i2.name);
-            }
-            function createNavigateToItem(rawItem) {
-                var declaration = rawItem.declaration;
-                var container = ts.getContainerNode(declaration);
-                return {
-                    name: rawItem.name,
-                    kind: ts.getNodeKind(declaration),
-                    kindModifiers: ts.getNodeModifiers(declaration),
-                    matchKind: ts.PatternMatchKind[rawItem.matchKind],
-                    isCaseSensitive: rawItem.isCaseSensitive,
-                    fileName: rawItem.fileName,
-                    textSpan: ts.createTextSpanFromBounds(declaration.getStart(), declaration.getEnd()),
-                    // TODO(jfreeman): What should be the containerName when the container has a computed name?
-                    containerName: container && container.name ? container.name.text : "",
-                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
-                };
-            }
-        }
-        NavigateTo.getNavigateToItems = getNavigateToItems;
-    })(NavigateTo = ts.NavigateTo || (ts.NavigateTo = {}));
-})(ts || (ts = {}));
-/// <reference path='services.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var NavigationBar;
-    (function (NavigationBar) {
-        function getNavigationBarItems(sourceFile, compilerOptions) {
-            // TODO: Handle JS files differently in 'navbar' calls for now, but ideally we should unify
-            // the 'navbar' and 'navto' logic for TypeScript and JavaScript.
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                return getJsNavigationBarItems(sourceFile, compilerOptions);
-            }
-            // If the source file has any child items, then it included in the tree
-            // and takes lexical ownership of all other top-level items.
-            var hasGlobalNode = false;
-            return getItemsWorker(getTopLevelNodes(sourceFile), createTopLevelItem);
-            function getIndent(node) {
-                // If we have a global node in the tree,
-                // then it adds an extra layer of depth to all subnodes.
-                var indent = hasGlobalNode ? 1 : 0;
-                var current = node.parent;
-                while (current) {
-                    switch (current.kind) {
-                        case 225 /* ModuleDeclaration */:
-                            // If we have a module declared as A.B.C, it is more "intuitive"
-                            // to say it only has a single layer of depth
-                            do {
-                                current = current.parent;
-                            } while (current.kind === 225 /* ModuleDeclaration */);
-                        // fall through
-                        case 221 /* ClassDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                        case 220 /* FunctionDeclaration */:
-                            indent++;
-                    }
-                    current = current.parent;
-                }
-                return indent;
-            }
-            function getChildNodes(nodes) {
-                var childNodes = [];
-                function visit(node) {
-                    switch (node.kind) {
-                        case 200 /* VariableStatement */:
-                            ts.forEach(node.declarationList.declarations, visit);
-                            break;
-                        case 167 /* ObjectBindingPattern */:
-                        case 168 /* ArrayBindingPattern */:
-                            ts.forEach(node.elements, visit);
-                            break;
-                        case 236 /* ExportDeclaration */:
-                            // Handle named exports case e.g.:
-                            //    export {a, b as B} from "mod";
-                            if (node.exportClause) {
-                                ts.forEach(node.exportClause.elements, visit);
-                            }
-                            break;
-                        case 230 /* ImportDeclaration */:
-                            var importClause = node.importClause;
-                            if (importClause) {
-                                // Handle default import case e.g.:
-                                //    import d from "mod";
-                                if (importClause.name) {
-                                    childNodes.push(importClause);
-                                }
-                                // Handle named bindings in imports e.g.:
-                                //    import * as NS from "mod";
-                                //    import {a, b as B} from "mod";
-                                if (importClause.namedBindings) {
-                                    if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                                        childNodes.push(importClause.namedBindings);
-                                    }
-                                    else {
-                                        ts.forEach(importClause.namedBindings.elements, visit);
-                                    }
-                                }
-                            }
-                            break;
-                        case 169 /* BindingElement */:
-                        case 218 /* VariableDeclaration */:
-                            if (ts.isBindingPattern(node.name)) {
-                                visit(node.name);
-                                break;
-                            }
-                        // Fall through
-                        case 221 /* ClassDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                        case 225 /* ModuleDeclaration */:
-                        case 220 /* FunctionDeclaration */:
-                        case 229 /* ImportEqualsDeclaration */:
-                        case 234 /* ImportSpecifier */:
-                        case 238 /* ExportSpecifier */:
-                            childNodes.push(node);
-                            break;
-                    }
-                }
-                // for (let i = 0, n = nodes.length; i < n; i++) {
-                //    let node = nodes[i];
-                //    if (node.kind === SyntaxKind.ClassDeclaration ||
-                //        node.kind === SyntaxKind.EnumDeclaration ||
-                //        node.kind === SyntaxKind.InterfaceDeclaration ||
-                //        node.kind === SyntaxKind.ModuleDeclaration ||
-                //        node.kind === SyntaxKind.FunctionDeclaration) {
-                //        childNodes.push(node);
-                //    }
-                //    else if (node.kind === SyntaxKind.VariableStatement) {
-                //        childNodes.push.apply(childNodes, (<VariableStatement>node).declarations);
-                //    }
-                // }
-                ts.forEach(nodes, visit);
-                return sortNodes(childNodes);
-            }
-            function getTopLevelNodes(node) {
-                var topLevelNodes = [];
-                topLevelNodes.push(node);
-                addTopLevelNodes(node.statements, topLevelNodes);
-                return topLevelNodes;
-            }
-            function sortNodes(nodes) {
-                return nodes.slice(0).sort(function (n1, n2) {
-                    if (n1.name && n2.name) {
-                        return ts.getPropertyNameForPropertyNameNode(n1.name).localeCompare(ts.getPropertyNameForPropertyNameNode(n2.name));
-                    }
-                    else if (n1.name) {
-                        return 1;
-                    }
-                    else if (n2.name) {
-                        return -1;
-                    }
-                    else {
-                        return n1.kind - n2.kind;
-                    }
-                });
-            }
-            function addTopLevelNodes(nodes, topLevelNodes) {
-                nodes = sortNodes(nodes);
-                for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
-                    var node = nodes_4[_i];
-                    switch (node.kind) {
-                        case 221 /* ClassDeclaration */:
-                            topLevelNodes.push(node);
-                            for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
-                                var member = _b[_a];
-                                if (member.kind === 147 /* MethodDeclaration */ || member.kind === 148 /* Constructor */) {
-                                    if (member.body) {
-                                        // We do not include methods that does not have child functions in it, because of duplications.
-                                        if (hasNamedFunctionDeclarations(member.body.statements)) {
-                                            topLevelNodes.push(member);
-                                        }
-                                        addTopLevelNodes(member.body.statements, topLevelNodes);
-                                    }
-                                }
-                            }
-                            break;
-                        case 224 /* EnumDeclaration */:
-                        case 222 /* InterfaceDeclaration */:
-                        case 223 /* TypeAliasDeclaration */:
-                            topLevelNodes.push(node);
-                            break;
-                        case 225 /* ModuleDeclaration */:
-                            var moduleDeclaration = node;
-                            topLevelNodes.push(node);
-                            addTopLevelNodes(getInnermostModule(moduleDeclaration).body.statements, topLevelNodes);
-                            break;
-                        case 220 /* FunctionDeclaration */:
-                            var functionDeclaration = node;
-                            if (isTopLevelFunctionDeclaration(functionDeclaration)) {
-                                topLevelNodes.push(node);
-                                addTopLevelNodes(functionDeclaration.body.statements, topLevelNodes);
-                            }
-                            break;
-                    }
-                }
-            }
-            function hasNamedFunctionDeclarations(nodes) {
-                for (var _i = 0, nodes_5 = nodes; _i < nodes_5.length; _i++) {
-                    var s = nodes_5[_i];
-                    if (s.kind === 220 /* FunctionDeclaration */ && !isEmpty(s.name.text)) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function isTopLevelFunctionDeclaration(functionDeclaration) {
-                if (functionDeclaration.kind === 220 /* FunctionDeclaration */) {
-                    // A function declaration is 'top level' if it contains any function declarations
-                    // within it.
-                    if (functionDeclaration.body && functionDeclaration.body.kind === 199 /* Block */) {
-                        // Proper function declarations can only have identifier names
-                        if (hasNamedFunctionDeclarations(functionDeclaration.body.statements)) {
-                            return true;
-                        }
-                        // Or if it is not parented by another function. I.e all functions at module scope are 'top level'.
-                        if (!ts.isFunctionBlock(functionDeclaration.parent)) {
-                            return true;
-                        }
-                        else {
-                            // We have made sure that a grand parent node exists with 'isFunctionBlock()' above.
-                            var grandParentKind = functionDeclaration.parent.parent.kind;
-                            if (grandParentKind === 147 /* MethodDeclaration */ ||
-                                grandParentKind === 148 /* Constructor */) {
-                                return true;
-                            }
-                        }
-                    }
-                }
-                return false;
-            }
-            function getItemsWorker(nodes, createItem) {
-                var items = [];
-                var keyToItem = {};
-                for (var _i = 0, nodes_6 = nodes; _i < nodes_6.length; _i++) {
-                    var child = nodes_6[_i];
-                    var item = createItem(child);
-                    if (item !== undefined) {
-                        if (item.text.length > 0) {
-                            var key = item.text + "-" + item.kind + "-" + item.indent;
-                            var itemWithSameName = keyToItem[key];
-                            if (itemWithSameName) {
-                                // We had an item with the same name.  Merge these items together.
-                                merge(itemWithSameName, item);
-                            }
-                            else {
-                                keyToItem[key] = item;
-                                items.push(item);
-                            }
-                        }
-                    }
-                }
-                return items;
-            }
-            function merge(target, source) {
-                // First, add any spans in the source to the target.
-                ts.addRange(target.spans, source.spans);
-                if (source.childItems) {
-                    if (!target.childItems) {
-                        target.childItems = [];
-                    }
-                    // Next, recursively merge or add any children in the source as appropriate.
-                    outer: for (var _i = 0, _a = source.childItems; _i < _a.length; _i++) {
-                        var sourceChild = _a[_i];
-                        for (var _b = 0, _c = target.childItems; _b < _c.length; _b++) {
-                            var targetChild = _c[_b];
-                            if (targetChild.text === sourceChild.text && targetChild.kind === sourceChild.kind) {
-                                // Found a match.  merge them.
-                                merge(targetChild, sourceChild);
-                                continue outer;
-                            }
-                        }
-                        // Didn't find a match, just add this child to the list.
-                        target.childItems.push(sourceChild);
-                    }
-                }
-            }
-            function createChildItem(node) {
-                switch (node.kind) {
-                    case 142 /* Parameter */:
-                        if (ts.isBindingPattern(node.name)) {
-                            break;
-                        }
-                        if ((node.flags & 1023 /* Modifier */) === 0) {
-                            return undefined;
-                        }
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberFunctionElement);
-                    case 149 /* GetAccessor */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberGetAccessorElement);
-                    case 150 /* SetAccessor */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberSetAccessorElement);
-                    case 153 /* IndexSignature */:
-                        return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
-                    case 224 /* EnumDeclaration */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.enumElement);
-                    case 255 /* EnumMember */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
-                    case 222 /* InterfaceDeclaration */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.interfaceElement);
-                    case 151 /* CallSignature */:
-                        return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
-                    case 152 /* ConstructSignature */:
-                        return createItem(node, "new()", ts.ScriptElementKind.constructSignatureElement);
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
-                    case 220 /* FunctionDeclaration */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.functionElement);
-                    case 218 /* VariableDeclaration */:
-                    case 169 /* BindingElement */:
-                        var variableDeclarationNode = void 0;
-                        var name_35;
-                        if (node.kind === 169 /* BindingElement */) {
-                            name_35 = node.name;
-                            variableDeclarationNode = node;
-                            // binding elements are added only for variable declarations
-                            // bubble up to the containing variable declaration
-                            while (variableDeclarationNode && variableDeclarationNode.kind !== 218 /* VariableDeclaration */) {
-                                variableDeclarationNode = variableDeclarationNode.parent;
-                            }
-                            ts.Debug.assert(variableDeclarationNode !== undefined);
-                        }
-                        else {
-                            ts.Debug.assert(!ts.isBindingPattern(node.name));
-                            variableDeclarationNode = node;
-                            name_35 = node.name;
-                        }
-                        if (ts.isConst(variableDeclarationNode)) {
-                            return createItem(node, getTextOfNode(name_35), ts.ScriptElementKind.constElement);
-                        }
-                        else if (ts.isLet(variableDeclarationNode)) {
-                            return createItem(node, getTextOfNode(name_35), ts.ScriptElementKind.letElement);
-                        }
-                        else {
-                            return createItem(node, getTextOfNode(name_35), ts.ScriptElementKind.variableElement);
-                        }
-                    case 148 /* Constructor */:
-                        return createItem(node, "constructor", ts.ScriptElementKind.constructorImplementationElement);
-                    case 238 /* ExportSpecifier */:
-                    case 234 /* ImportSpecifier */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 231 /* ImportClause */:
-                    case 232 /* NamespaceImport */:
-                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.alias);
-                }
-                return undefined;
-                function createItem(node, name, scriptElementKind) {
-                    return getNavigationBarItem(name, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)]);
-                }
-            }
-            function isEmpty(text) {
-                return !text || text.trim() === "";
-            }
-            function getNavigationBarItem(text, kind, kindModifiers, spans, childItems, indent) {
-                if (childItems === void 0) { childItems = []; }
-                if (indent === void 0) { indent = 0; }
-                if (isEmpty(text)) {
-                    return undefined;
-                }
-                return {
-                    text: text,
-                    kind: kind,
-                    kindModifiers: kindModifiers,
-                    spans: spans,
-                    childItems: childItems,
-                    indent: indent,
-                    bolded: false,
-                    grayed: false
-                };
-            }
-            function createTopLevelItem(node) {
-                switch (node.kind) {
-                    case 256 /* SourceFile */:
-                        return createSourceFileItem(node);
-                    case 221 /* ClassDeclaration */:
-                        return createClassItem(node);
-                    case 147 /* MethodDeclaration */:
-                    case 148 /* Constructor */:
-                        return createMemberFunctionLikeItem(node);
-                    case 224 /* EnumDeclaration */:
-                        return createEnumItem(node);
-                    case 222 /* InterfaceDeclaration */:
-                        return createInterfaceItem(node);
-                    case 225 /* ModuleDeclaration */:
-                        return createModuleItem(node);
-                    case 220 /* FunctionDeclaration */:
-                        return createFunctionItem(node);
-                    case 223 /* TypeAliasDeclaration */:
-                        return createTypeAliasItem(node);
-                }
-                return undefined;
-                function getModuleName(moduleDeclaration) {
-                    // We want to maintain quotation marks.
-                    if (ts.isAmbientModule(moduleDeclaration)) {
-                        return getTextOfNode(moduleDeclaration.name);
-                    }
-                    // Otherwise, we need to aggregate each identifier to build up the qualified name.
-                    var result = [];
-                    result.push(moduleDeclaration.name.text);
-                    while (moduleDeclaration.body && moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) {
-                        moduleDeclaration = moduleDeclaration.body;
-                        result.push(moduleDeclaration.name.text);
-                    }
-                    return result.join(".");
-                }
-                function createModuleItem(node) {
-                    var moduleName = getModuleName(node);
-                    var childItems = getItemsWorker(getChildNodes(getInnermostModule(node).body.statements), createChildItem);
-                    return getNavigationBarItem(moduleName, ts.ScriptElementKind.moduleElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-                function createFunctionItem(node) {
-                    if (node.body && node.body.kind === 199 /* Block */) {
-                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
-                        return getNavigationBarItem(!node.name ? "default" : node.name.text, ts.ScriptElementKind.functionElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                    }
-                    return undefined;
-                }
-                function createTypeAliasItem(node) {
-                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.typeElement, ts.getNodeModifiers(node), [getNodeSpan(node)], [], getIndent(node));
-                }
-                function createMemberFunctionLikeItem(node) {
-                    if (node.body && node.body.kind === 199 /* Block */) {
-                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
-                        var scriptElementKind = void 0;
-                        var memberFunctionName = void 0;
-                        if (node.kind === 147 /* MethodDeclaration */) {
-                            memberFunctionName = ts.getPropertyNameForPropertyNameNode(node.name);
-                            scriptElementKind = ts.ScriptElementKind.memberFunctionElement;
-                        }
-                        else {
-                            memberFunctionName = "constructor";
-                            scriptElementKind = ts.ScriptElementKind.constructorImplementationElement;
-                        }
-                        return getNavigationBarItem(memberFunctionName, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                    }
-                    return undefined;
-                }
-                function createSourceFileItem(node) {
-                    var childItems = getItemsWorker(getChildNodes(node.statements), createChildItem);
-                    if (childItems === undefined || childItems.length === 0) {
-                        return undefined;
-                    }
-                    hasGlobalNode = true;
-                    var rootName = ts.isExternalModule(node)
-                        ? "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(node.fileName)))) + "\""
-                        : "<global>";
-                    return getNavigationBarItem(rootName, ts.ScriptElementKind.moduleElement, ts.ScriptElementKindModifier.none, [getNodeSpan(node)], childItems);
-                }
-                function createClassItem(node) {
-                    var childItems;
-                    if (node.members) {
-                        var constructor = ts.forEach(node.members, function (member) {
-                            return member.kind === 148 /* Constructor */ && member;
-                        });
-                        // Add the constructor parameters in as children of the class (for property parameters).
-                        // Note that *all non-binding pattern named* parameters will be added to the nodes array, but parameters that
-                        // are not properties will be filtered out later by createChildItem.
-                        var nodes = removeDynamicallyNamedProperties(node);
-                        if (constructor) {
-                            ts.addRange(nodes, ts.filter(constructor.parameters, function (p) { return !ts.isBindingPattern(p.name); }));
-                        }
-                        childItems = getItemsWorker(sortNodes(nodes), createChildItem);
-                    }
-                    var nodeName = !node.name ? "default" : node.name.text;
-                    return getNavigationBarItem(nodeName, ts.ScriptElementKind.classElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-                function createEnumItem(node) {
-                    var childItems = getItemsWorker(sortNodes(removeComputedProperties(node)), createChildItem);
-                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.enumElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-                function createInterfaceItem(node) {
-                    var childItems = getItemsWorker(sortNodes(removeDynamicallyNamedProperties(node)), createChildItem);
-                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.interfaceElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
-                }
-            }
-            function removeComputedProperties(node) {
-                return ts.filter(node.members, function (member) { return member.name === undefined || member.name.kind !== 140 /* ComputedPropertyName */; });
-            }
-            /**
-             * Like removeComputedProperties, but retains the properties with well known symbol names
-             */
-            function removeDynamicallyNamedProperties(node) {
-                return ts.filter(node.members, function (member) { return !ts.hasDynamicName(member); });
-            }
-            function getInnermostModule(node) {
-                while (node.body.kind === 225 /* ModuleDeclaration */) {
-                    node = node.body;
-                }
-                return node;
-            }
-            function getNodeSpan(node) {
-                return node.kind === 256 /* SourceFile */
-                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
-            }
-            function getTextOfNode(node) {
-                return ts.getTextOfNodeFromSourceText(sourceFile.text, node);
-            }
-        }
-        NavigationBar.getNavigationBarItems = getNavigationBarItems;
-        function getJsNavigationBarItems(sourceFile, compilerOptions) {
-            var anonFnText = "<function>";
-            var anonClassText = "<class>";
-            var indent = 0;
-            var rootName = ts.isExternalModule(sourceFile) ?
-                "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(sourceFile.fileName)))) + "\""
-                : "<global>";
-            var sourceFileItem = getNavBarItem(rootName, ts.ScriptElementKind.moduleElement, [getNodeSpan(sourceFile)]);
-            var topItem = sourceFileItem;
-            // Walk the whole file, because we want to also find function expressions - which may be in variable initializer,
-            // call arguments, expressions, etc...
-            ts.forEachChild(sourceFile, visitNode);
-            function visitNode(node) {
-                var newItem = createNavBarItem(node);
-                if (newItem) {
-                    topItem.childItems.push(newItem);
-                }
-                // Add a level if traversing into a container
-                if (newItem && (ts.isFunctionLike(node) || ts.isClassLike(node))) {
-                    var lastTop = topItem;
-                    indent++;
-                    topItem = newItem;
-                    ts.forEachChild(node, visitNode);
-                    topItem = lastTop;
-                    indent--;
-                    // If the last item added was an anonymous function expression, and it had no children, discard it.
-                    if (newItem && newItem.text === anonFnText && newItem.childItems.length === 0) {
-                        topItem.childItems.pop();
-                    }
-                }
-                else {
-                    ts.forEachChild(node, visitNode);
-                }
-            }
-            function createNavBarItem(node) {
-                switch (node.kind) {
-                    case 218 /* VariableDeclaration */:
-                        // Only add to the navbar if at the top-level of the file
-                        // Note: "const" and "let" are also SyntaxKind.VariableDeclarations
-                        if (node.parent /*VariableDeclarationList*/.parent /*VariableStatement*/
-                            .parent /*SourceFile*/.kind !== 256 /* SourceFile */) {
-                            return undefined;
-                        }
-                        // If it is initialized with a function expression, handle it when we reach the function expression node
-                        var varDecl = node;
-                        if (varDecl.initializer && (varDecl.initializer.kind === 179 /* FunctionExpression */ ||
-                            varDecl.initializer.kind === 180 /* ArrowFunction */ ||
-                            varDecl.initializer.kind === 192 /* ClassExpression */)) {
-                            return undefined;
-                        }
-                    // Fall through
-                    case 220 /* FunctionDeclaration */:
-                    case 221 /* ClassDeclaration */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        // "export default function().." looks just like a regular function/class declaration, except with the 'default' flag
-                        var name_36 = node.flags && (node.flags & 512 /* Default */) && !node.name ? "default" :
-                            node.kind === 148 /* Constructor */ ? "constructor" :
-                                ts.declarationNameToString(node.name);
-                        return getNavBarItem(name_36, getScriptKindForElementKind(node.kind), [getNodeSpan(node)]);
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 192 /* ClassExpression */:
-                        return getDefineModuleItem(node) || getFunctionOrClassExpressionItem(node);
-                    case 147 /* MethodDeclaration */:
-                        var methodDecl = node;
-                        return getNavBarItem(ts.declarationNameToString(methodDecl.name), ts.ScriptElementKind.memberFunctionElement, [getNodeSpan(node)]);
-                    case 235 /* ExportAssignment */:
-                        // e.g. "export default <expr>"
-                        return getNavBarItem("default", ts.ScriptElementKind.variableElement, [getNodeSpan(node)]);
-                    case 231 /* ImportClause */:
-                        if (!node.name) {
-                            // No default import (this node is still a parent of named & namespace imports, which are handled below)
-                            return undefined;
-                        }
-                    // fall through
-                    case 234 /* ImportSpecifier */: // e.g. 'id' in: import {id} from 'mod' (in NamedImports, in ImportClause)
-                    case 232 /* NamespaceImport */: // e.g. '* as ns' in: import * as ns from 'mod' (in ImportClause)
-                    case 238 /* ExportSpecifier */:
-                        // Export specifiers are only interesting if they are reexports from another module, or renamed, else they are already globals
-                        if (node.kind === 238 /* ExportSpecifier */) {
-                            if (!node.parent.parent.moduleSpecifier && !node.propertyName) {
-                                return undefined;
-                            }
-                        }
-                        var decl = node;
-                        if (!decl.name) {
-                            return undefined;
-                        }
-                        var declName = ts.declarationNameToString(decl.name);
-                        return getNavBarItem(declName, ts.ScriptElementKind.constElement, [getNodeSpan(node)]);
-                    default:
-                        return undefined;
-                }
-            }
-            function getNavBarItem(text, kind, spans, kindModifiers) {
-                if (kindModifiers === void 0) { kindModifiers = ts.ScriptElementKindModifier.none; }
-                return {
-                    text: text, kind: kind, kindModifiers: kindModifiers, spans: spans, childItems: [], indent: indent, bolded: false, grayed: false
-                };
-            }
-            function getDefineModuleItem(node) {
-                if (node.kind !== 179 /* FunctionExpression */ && node.kind !== 180 /* ArrowFunction */) {
-                    return undefined;
-                }
-                // No match if this is not a call expression to an identifier named 'define'
-                if (node.parent.kind !== 174 /* CallExpression */) {
-                    return undefined;
-                }
-                var callExpr = node.parent;
-                if (callExpr.expression.kind !== 69 /* Identifier */ || callExpr.expression.getText() !== "define") {
-                    return undefined;
-                }
-                // Return a module of either the given text in the first argument, or of the source file path
-                var defaultName = node.getSourceFile().fileName;
-                if (callExpr.arguments[0].kind === 9 /* StringLiteral */) {
-                    defaultName = (callExpr.arguments[0]).text;
-                }
-                return getNavBarItem(defaultName, ts.ScriptElementKind.moduleElement, [getNodeSpan(node.parent)]);
-            }
-            function getFunctionOrClassExpressionItem(node) {
-                if (node.kind !== 179 /* FunctionExpression */ &&
-                    node.kind !== 180 /* ArrowFunction */ &&
-                    node.kind !== 192 /* ClassExpression */) {
-                    return undefined;
-                }
-                var fnExpr = node;
-                var fnName;
-                if (fnExpr.name && ts.getFullWidth(fnExpr.name) > 0) {
-                    // The expression has an identifier, so use that as the name
-                    fnName = ts.declarationNameToString(fnExpr.name);
-                }
-                else {
-                    // See if it is a var initializer. If so, use the var name.
-                    if (fnExpr.parent.kind === 218 /* VariableDeclaration */) {
-                        fnName = ts.declarationNameToString(fnExpr.parent.name);
-                    }
-                    else if (fnExpr.parent.kind === 187 /* BinaryExpression */ &&
-                        fnExpr.parent.operatorToken.kind === 56 /* EqualsToken */) {
-                        fnName = fnExpr.parent.left.getText();
-                    }
-                    else if (fnExpr.parent.kind === 253 /* PropertyAssignment */ &&
-                        fnExpr.parent.name) {
-                        fnName = fnExpr.parent.name.getText();
-                    }
-                    else {
-                        fnName = node.kind === 192 /* ClassExpression */ ? anonClassText : anonFnText;
-                    }
-                }
-                var scriptKind = node.kind === 192 /* ClassExpression */ ? ts.ScriptElementKind.classElement : ts.ScriptElementKind.functionElement;
-                return getNavBarItem(fnName, scriptKind, [getNodeSpan(node)]);
-            }
-            function getNodeSpan(node) {
-                return node.kind === 256 /* SourceFile */
-                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
-            }
-            function getScriptKindForElementKind(kind) {
-                switch (kind) {
-                    case 218 /* VariableDeclaration */:
-                        return ts.ScriptElementKind.variableElement;
-                    case 220 /* FunctionDeclaration */:
-                        return ts.ScriptElementKind.functionElement;
-                    case 221 /* ClassDeclaration */:
-                        return ts.ScriptElementKind.classElement;
-                    case 148 /* Constructor */:
-                        return ts.ScriptElementKind.constructorImplementationElement;
-                    case 149 /* GetAccessor */:
-                        return ts.ScriptElementKind.memberGetAccessorElement;
-                    case 150 /* SetAccessor */:
-                        return ts.ScriptElementKind.memberSetAccessorElement;
-                    default:
-                        return "unknown";
-                }
-            }
-            return sourceFileItem.childItems;
-        }
-        NavigationBar.getJsNavigationBarItems = getJsNavigationBarItems;
-    })(NavigationBar = ts.NavigationBar || (ts.NavigationBar = {}));
-})(ts || (ts = {}));
-/* @internal */
-var ts;
-(function (ts) {
-    // Note(cyrusn): this enum is ordered from strongest match type to weakest match type.
-    (function (PatternMatchKind) {
-        PatternMatchKind[PatternMatchKind["exact"] = 0] = "exact";
-        PatternMatchKind[PatternMatchKind["prefix"] = 1] = "prefix";
-        PatternMatchKind[PatternMatchKind["substring"] = 2] = "substring";
-        PatternMatchKind[PatternMatchKind["camelCase"] = 3] = "camelCase";
-    })(ts.PatternMatchKind || (ts.PatternMatchKind = {}));
-    var PatternMatchKind = ts.PatternMatchKind;
-    function createPatternMatch(kind, punctuationStripped, isCaseSensitive, camelCaseWeight) {
-        return {
-            kind: kind,
-            punctuationStripped: punctuationStripped,
-            isCaseSensitive: isCaseSensitive,
-            camelCaseWeight: camelCaseWeight
-        };
-    }
-    function createPatternMatcher(pattern) {
-        // We'll often see the same candidate string many times when searching (For example, when
-        // we see the name of a module that is used everywhere, or the name of an overload).  As
-        // such, we cache the information we compute about the candidate for the life of this
-        // pattern matcher so we don't have to compute it multiple times.
-        var stringToWordSpans = {};
-        pattern = pattern.trim();
-        var dotSeparatedSegments = pattern.split(".").map(function (p) { return createSegment(p.trim()); });
-        var invalidPattern = dotSeparatedSegments.length === 0 || ts.forEach(dotSeparatedSegments, segmentIsInvalid);
-        return {
-            getMatches: getMatches,
-            getMatchesForLastSegmentOfPattern: getMatchesForLastSegmentOfPattern,
-            patternContainsDots: dotSeparatedSegments.length > 1
-        };
-        // Quick checks so we can bail out when asked to match a candidate.
-        function skipMatch(candidate) {
-            return invalidPattern || !candidate;
-        }
-        function getMatchesForLastSegmentOfPattern(candidate) {
-            if (skipMatch(candidate)) {
-                return undefined;
-            }
-            return matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
-        }
-        function getMatches(candidateContainers, candidate) {
-            if (skipMatch(candidate)) {
-                return undefined;
-            }
-            // First, check that the last part of the dot separated pattern matches the name of the
-            // candidate.  If not, then there's no point in proceeding and doing the more
-            // expensive work.
-            var candidateMatch = matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
-            if (!candidateMatch) {
-                return undefined;
-            }
-            candidateContainers = candidateContainers || [];
-            // -1 because the last part was checked against the name, and only the rest
-            // of the parts are checked against the container.
-            if (dotSeparatedSegments.length - 1 > candidateContainers.length) {
-                // There weren't enough container parts to match against the pattern parts.
-                // So this definitely doesn't match.
-                return undefined;
-            }
-            // So far so good.  Now break up the container for the candidate and check if all
-            // the dotted parts match up correctly.
-            var totalMatch = candidateMatch;
-            for (var i = dotSeparatedSegments.length - 2, j = candidateContainers.length - 1; i >= 0; i -= 1, j -= 1) {
-                var segment = dotSeparatedSegments[i];
-                var containerName = candidateContainers[j];
-                var containerMatch = matchSegment(containerName, segment);
-                if (!containerMatch) {
-                    // This container didn't match the pattern piece.  So there's no match at all.
-                    return undefined;
-                }
-                ts.addRange(totalMatch, containerMatch);
-            }
-            // Success, this symbol's full name matched against the dotted name the user was asking
-            // about.
-            return totalMatch;
-        }
-        function getWordSpans(word) {
-            if (!ts.hasProperty(stringToWordSpans, word)) {
-                stringToWordSpans[word] = breakIntoWordSpans(word);
-            }
-            return stringToWordSpans[word];
-        }
-        function matchTextChunk(candidate, chunk, punctuationStripped) {
-            var index = indexOfIgnoringCase(candidate, chunk.textLowerCase);
-            if (index === 0) {
-                if (chunk.text.length === candidate.length) {
-                    // a) Check if the part matches the candidate entirely, in an case insensitive or
-                    //    sensitive manner.  If it does, return that there was an exact match.
-                    return createPatternMatch(PatternMatchKind.exact, punctuationStripped, /*isCaseSensitive:*/ candidate === chunk.text);
-                }
-                else {
-                    // b) Check if the part is a prefix of the candidate, in a case insensitive or sensitive
-                    //    manner.  If it does, return that there was a prefix match.
-                    return createPatternMatch(PatternMatchKind.prefix, punctuationStripped, /*isCaseSensitive:*/ startsWith(candidate, chunk.text));
-                }
-            }
-            var isLowercase = chunk.isLowerCase;
-            if (isLowercase) {
-                if (index > 0) {
-                    // c) If the part is entirely lowercase, then check if it is contained anywhere in the
-                    //    candidate in a case insensitive manner.  If so, return that there was a substring
-                    //    match.
-                    //
-                    //    Note: We only have a substring match if the lowercase part is prefix match of some
-                    //    word part. That way we don't match something like 'Class' when the user types 'a'.
-                    //    But we would match 'FooAttribute' (since 'Attribute' starts with 'a').
-                    var wordSpans = getWordSpans(candidate);
-                    for (var _i = 0, wordSpans_1 = wordSpans; _i < wordSpans_1.length; _i++) {
-                        var span = wordSpans_1[_i];
-                        if (partStartsWith(candidate, span, chunk.text, /*ignoreCase:*/ true)) {
-                            return createPatternMatch(PatternMatchKind.substring, punctuationStripped, 
-                            /*isCaseSensitive:*/ partStartsWith(candidate, span, chunk.text, /*ignoreCase:*/ false));
-                        }
-                    }
-                }
-            }
-            else {
-                // d) If the part was not entirely lowercase, then check if it is contained in the
-                //    candidate in a case *sensitive* manner. If so, return that there was a substring
-                //    match.
-                if (candidate.indexOf(chunk.text) > 0) {
-                    return createPatternMatch(PatternMatchKind.substring, punctuationStripped, /*isCaseSensitive:*/ true);
-                }
-            }
-            if (!isLowercase) {
-                // e) If the part was not entirely lowercase, then attempt a camel cased match as well.
-                if (chunk.characterSpans.length > 0) {
-                    var candidateParts = getWordSpans(candidate);
-                    var camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, /*ignoreCase:*/ false);
-                    if (camelCaseWeight !== undefined) {
-                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, /*isCaseSensitive:*/ true, /*camelCaseWeight:*/ camelCaseWeight);
-                    }
-                    camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, /*ignoreCase:*/ true);
-                    if (camelCaseWeight !== undefined) {
-                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, /*isCaseSensitive:*/ false, /*camelCaseWeight:*/ camelCaseWeight);
-                    }
-                }
-            }
-            if (isLowercase) {
-                // f) Is the pattern a substring of the candidate starting on one of the candidate's word boundaries?
-                // We could check every character boundary start of the candidate for the pattern. However, that's
-                // an m * n operation in the wost case. Instead, find the first instance of the pattern
-                // substring, and see if it starts on a capital letter. It seems unlikely that the user will try to
-                // filter the list based on a substring that starts on a capital letter and also with a lowercase one.
-                // (Pattern: fogbar, Candidate: quuxfogbarFogBar).
-                if (chunk.text.length < candidate.length) {
-                    if (index > 0 && isUpperCaseLetter(candidate.charCodeAt(index))) {
-                        return createPatternMatch(PatternMatchKind.substring, punctuationStripped, /*isCaseSensitive:*/ false);
-                    }
-                }
-            }
-            return undefined;
-        }
-        function containsSpaceOrAsterisk(text) {
-            for (var i = 0; i < text.length; i++) {
-                var ch = text.charCodeAt(i);
-                if (ch === 32 /* space */ || ch === 42 /* asterisk */) {
-                    return true;
-                }
-            }
-            return false;
-        }
-        function matchSegment(candidate, segment) {
-            // First check if the segment matches as is.  This is also useful if the segment contains
-            // characters we would normally strip when splitting into parts that we also may want to
-            // match in the candidate.  For example if the segment is "@int" and the candidate is
-            // "@int", then that will show up as an exact match here.
-            //
-            // Note: if the segment contains a space or an asterisk then we must assume that it's a
-            // multi-word segment.
-            if (!containsSpaceOrAsterisk(segment.totalTextChunk.text)) {
-                var match = matchTextChunk(candidate, segment.totalTextChunk, /*punctuationStripped:*/ false);
-                if (match) {
-                    return [match];
-                }
-            }
-            // The logic for pattern matching is now as follows:
-            //
-            // 1) Break the segment passed in into words.  Breaking is rather simple and a
-            //    good way to think about it that if gives you all the individual alphanumeric words
-            //    of the pattern.
-            //
-            // 2) For each word try to match the word against the candidate value.
-            //
-            // 3) Matching is as follows:
-            //
-            //   a) Check if the word matches the candidate entirely, in an case insensitive or
-            //    sensitive manner.  If it does, return that there was an exact match.
-            //
-            //   b) Check if the word is a prefix of the candidate, in a case insensitive or
-            //      sensitive manner.  If it does, return that there was a prefix match.
-            //
-            //   c) If the word is entirely lowercase, then check if it is contained anywhere in the
-            //      candidate in a case insensitive manner.  If so, return that there was a substring
-            //      match.
-            //
-            //      Note: We only have a substring match if the lowercase part is prefix match of
-            //      some word part. That way we don't match something like 'Class' when the user
-            //      types 'a'. But we would match 'FooAttribute' (since 'Attribute' starts with
-            //      'a').
-            //
-            //   d) If the word was not entirely lowercase, then check if it is contained in the
-            //      candidate in a case *sensitive* manner. If so, return that there was a substring
-            //      match.
-            //
-            //   e) If the word was not entirely lowercase, then attempt a camel cased match as
-            //      well.
-            //
-            //   f) The word is all lower case. Is it a case insensitive substring of the candidate starting
-            //      on a part boundary of the candidate?
-            //
-            // Only if all words have some sort of match is the pattern considered matched.
-            var subWordTextChunks = segment.subWordTextChunks;
-            var matches = undefined;
-            for (var _i = 0, subWordTextChunks_1 = subWordTextChunks; _i < subWordTextChunks_1.length; _i++) {
-                var subWordTextChunk = subWordTextChunks_1[_i];
-                // Try to match the candidate with this word
-                var result = matchTextChunk(candidate, subWordTextChunk, /*punctuationStripped:*/ true);
-                if (!result) {
-                    return undefined;
-                }
-                matches = matches || [];
-                matches.push(result);
-            }
-            return matches;
-        }
-        function partStartsWith(candidate, candidateSpan, pattern, ignoreCase, patternSpan) {
-            var patternPartStart = patternSpan ? patternSpan.start : 0;
-            var patternPartLength = patternSpan ? patternSpan.length : pattern.length;
-            if (patternPartLength > candidateSpan.length) {
-                // Pattern part is longer than the candidate part. There can never be a match.
-                return false;
-            }
-            if (ignoreCase) {
-                for (var i = 0; i < patternPartLength; i++) {
-                    var ch1 = pattern.charCodeAt(patternPartStart + i);
-                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
-                    if (toLowerCase(ch1) !== toLowerCase(ch2)) {
-                        return false;
-                    }
-                }
-            }
-            else {
-                for (var i = 0; i < patternPartLength; i++) {
-                    var ch1 = pattern.charCodeAt(patternPartStart + i);
-                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
-                    if (ch1 !== ch2) {
-                        return false;
-                    }
-                }
-            }
-            return true;
-        }
-        function tryCamelCaseMatch(candidate, candidateParts, chunk, ignoreCase) {
-            var chunkCharacterSpans = chunk.characterSpans;
-            // Note: we may have more pattern parts than candidate parts.  This is because multiple
-            // pattern parts may match a candidate part.  For example "SiUI" against "SimpleUI".
-            // We'll have 3 pattern parts Si/U/I against two candidate parts Simple/UI.  However, U
-            // and I will both match in UI.
-            var currentCandidate = 0;
-            var currentChunkSpan = 0;
-            var firstMatch = undefined;
-            var contiguous = undefined;
-            while (true) {
-                // Let's consider our termination cases
-                if (currentChunkSpan === chunkCharacterSpans.length) {
-                    // We did match! We shall assign a weight to this
-                    var weight = 0;
-                    // Was this contiguous?
-                    if (contiguous) {
-                        weight += 1;
-                    }
-                    // Did we start at the beginning of the candidate?
-                    if (firstMatch === 0) {
-                        weight += 2;
-                    }
-                    return weight;
-                }
-                else if (currentCandidate === candidateParts.length) {
-                    // No match, since we still have more of the pattern to hit
-                    return undefined;
-                }
-                var candidatePart = candidateParts[currentCandidate];
-                var gotOneMatchThisCandidate = false;
-                // Consider the case of matching SiUI against SimpleUIElement. The candidate parts
-                // will be Simple/UI/Element, and the pattern parts will be Si/U/I.  We'll match 'Si'
-                // against 'Simple' first.  Then we'll match 'U' against 'UI'. However, we want to
-                // still keep matching pattern parts against that candidate part.
-                for (; currentChunkSpan < chunkCharacterSpans.length; currentChunkSpan++) {
-                    var chunkCharacterSpan = chunkCharacterSpans[currentChunkSpan];
-                    if (gotOneMatchThisCandidate) {
-                        // We've already gotten one pattern part match in this candidate.  We will
-                        // only continue trying to consumer pattern parts if the last part and this
-                        // part are both upper case.
-                        if (!isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan - 1].start)) ||
-                            !isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan].start))) {
-                            break;
-                        }
-                    }
-                    if (!partStartsWith(candidate, candidatePart, chunk.text, ignoreCase, chunkCharacterSpan)) {
-                        break;
-                    }
-                    gotOneMatchThisCandidate = true;
-                    firstMatch = firstMatch === undefined ? currentCandidate : firstMatch;
-                    // If we were contiguous, then keep that value.  If we weren't, then keep that
-                    // value.  If we don't know, then set the value to 'true' as an initial match is
-                    // obviously contiguous.
-                    contiguous = contiguous === undefined ? true : contiguous;
-                    candidatePart = ts.createTextSpan(candidatePart.start + chunkCharacterSpan.length, candidatePart.length - chunkCharacterSpan.length);
-                }
-                // Check if we matched anything at all.  If we didn't, then we need to unset the
-                // contiguous bit if we currently had it set.
-                // If we haven't set the bit yet, then that means we haven't matched anything so
-                // far, and we don't want to change that.
-                if (!gotOneMatchThisCandidate && contiguous !== undefined) {
-                    contiguous = false;
-                }
-                // Move onto the next candidate.
-                currentCandidate++;
-            }
-        }
-    }
-    ts.createPatternMatcher = createPatternMatcher;
-    function createSegment(text) {
-        return {
-            totalTextChunk: createTextChunk(text),
-            subWordTextChunks: breakPatternIntoTextChunks(text)
-        };
-    }
-    // A segment is considered invalid if we couldn't find any words in it.
-    function segmentIsInvalid(segment) {
-        return segment.subWordTextChunks.length === 0;
-    }
-    function isUpperCaseLetter(ch) {
-        // Fast check for the ascii range.
-        if (ch >= 65 /* A */ && ch <= 90 /* Z */) {
-            return true;
-        }
-        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 2 /* Latest */)) {
-            return false;
-        }
-        // TODO: find a way to determine this for any unicode characters in a
-        // non-allocating manner.
-        var str = String.fromCharCode(ch);
-        return str === str.toUpperCase();
-    }
-    function isLowerCaseLetter(ch) {
-        // Fast check for the ascii range.
-        if (ch >= 97 /* a */ && ch <= 122 /* z */) {
-            return true;
-        }
-        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 2 /* Latest */)) {
-            return false;
-        }
-        // TODO: find a way to determine this for any unicode characters in a
-        // non-allocating manner.
-        var str = String.fromCharCode(ch);
-        return str === str.toLowerCase();
-    }
-    function startsWith(string, search) {
-        for (var i = 0, n = search.length; i < n; i++) {
-            if (string.charCodeAt(i) !== search.charCodeAt(i)) {
-                return false;
-            }
-        }
-        return true;
-    }
-    // Assumes 'value' is already lowercase.
-    function indexOfIgnoringCase(string, value) {
-        for (var i = 0, n = string.length - value.length; i <= n; i++) {
-            if (startsWithIgnoringCase(string, value, i)) {
-                return i;
-            }
-        }
-        return -1;
-    }
-    // Assumes 'value' is already lowercase.
-    function startsWithIgnoringCase(string, value, start) {
-        for (var i = 0, n = value.length; i < n; i++) {
-            var ch1 = toLowerCase(string.charCodeAt(i + start));
-            var ch2 = value.charCodeAt(i);
-            if (ch1 !== ch2) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function toLowerCase(ch) {
-        // Fast convert for the ascii range.
-        if (ch >= 65 /* A */ && ch <= 90 /* Z */) {
-            return 97 /* a */ + (ch - 65 /* A */);
-        }
-        if (ch < 127 /* maxAsciiCharacter */) {
-            return ch;
-        }
-        // TODO: find a way to compute this for any unicode characters in a
-        // non-allocating manner.
-        return String.fromCharCode(ch).toLowerCase().charCodeAt(0);
-    }
-    function isDigit(ch) {
-        // TODO(cyrusn): Find a way to support this for unicode digits.
-        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
-    }
-    function isWordChar(ch) {
-        return isUpperCaseLetter(ch) || isLowerCaseLetter(ch) || isDigit(ch) || ch === 95 /* _ */ || ch === 36 /* $ */;
-    }
-    function breakPatternIntoTextChunks(pattern) {
-        var result = [];
-        var wordStart = 0;
-        var wordLength = 0;
-        for (var i = 0; i < pattern.length; i++) {
-            var ch = pattern.charCodeAt(i);
-            if (isWordChar(ch)) {
-                if (wordLength === 0) {
-                    wordStart = i;
-                }
-                wordLength++;
-            }
-            else {
-                if (wordLength > 0) {
-                    result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
-                    wordLength = 0;
-                }
-            }
-        }
-        if (wordLength > 0) {
-            result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
-        }
-        return result;
-    }
-    function createTextChunk(text) {
-        var textLowerCase = text.toLowerCase();
-        return {
-            text: text,
-            textLowerCase: textLowerCase,
-            isLowerCase: text === textLowerCase,
-            characterSpans: breakIntoCharacterSpans(text)
-        };
-    }
-    /* @internal */ function breakIntoCharacterSpans(identifier) {
-        return breakIntoSpans(identifier, /*word:*/ false);
-    }
-    ts.breakIntoCharacterSpans = breakIntoCharacterSpans;
-    /* @internal */ function breakIntoWordSpans(identifier) {
-        return breakIntoSpans(identifier, /*word:*/ true);
-    }
-    ts.breakIntoWordSpans = breakIntoWordSpans;
-    function breakIntoSpans(identifier, word) {
-        var result = [];
-        var wordStart = 0;
-        for (var i = 1, n = identifier.length; i < n; i++) {
-            var lastIsDigit = isDigit(identifier.charCodeAt(i - 1));
-            var currentIsDigit = isDigit(identifier.charCodeAt(i));
-            var hasTransitionFromLowerToUpper = transitionFromLowerToUpper(identifier, word, i);
-            var hasTransitionFromUpperToLower = transitionFromUpperToLower(identifier, word, i, wordStart);
-            if (charIsPunctuation(identifier.charCodeAt(i - 1)) ||
-                charIsPunctuation(identifier.charCodeAt(i)) ||
-                lastIsDigit !== currentIsDigit ||
-                hasTransitionFromLowerToUpper ||
-                hasTransitionFromUpperToLower) {
-                if (!isAllPunctuation(identifier, wordStart, i)) {
-                    result.push(ts.createTextSpan(wordStart, i - wordStart));
-                }
-                wordStart = i;
-            }
-        }
-        if (!isAllPunctuation(identifier, wordStart, identifier.length)) {
-            result.push(ts.createTextSpan(wordStart, identifier.length - wordStart));
-        }
-        return result;
-    }
-    function charIsPunctuation(ch) {
-        switch (ch) {
-            case 33 /* exclamation */:
-            case 34 /* doubleQuote */:
-            case 35 /* hash */:
-            case 37 /* percent */:
-            case 38 /* ampersand */:
-            case 39 /* singleQuote */:
-            case 40 /* openParen */:
-            case 41 /* closeParen */:
-            case 42 /* asterisk */:
-            case 44 /* comma */:
-            case 45 /* minus */:
-            case 46 /* dot */:
-            case 47 /* slash */:
-            case 58 /* colon */:
-            case 59 /* semicolon */:
-            case 63 /* question */:
-            case 64 /* at */:
-            case 91 /* openBracket */:
-            case 92 /* backslash */:
-            case 93 /* closeBracket */:
-            case 95 /* _ */:
-            case 123 /* openBrace */:
-            case 125 /* closeBrace */:
-                return true;
-        }
-        return false;
-    }
-    function isAllPunctuation(identifier, start, end) {
-        for (var i = start; i < end; i++) {
-            var ch = identifier.charCodeAt(i);
-            // We don't consider _ or $ as punctuation as there may be things with that name.
-            if (!charIsPunctuation(ch) || ch === 95 /* _ */ || ch === 36 /* $ */) {
-                return false;
-            }
-        }
-        return true;
-    }
-    function transitionFromUpperToLower(identifier, word, index, wordStart) {
-        if (word) {
-            // Cases this supports:
-            // 1) IDisposable -> I, Disposable
-            // 2) UIElement -> UI, Element
-            // 3) HTMLDocument -> HTML, Document
-            //
-            // etc.
-            if (index !== wordStart &&
-                index + 1 < identifier.length) {
-                var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
-                var nextIsLower = isLowerCaseLetter(identifier.charCodeAt(index + 1));
-                if (currentIsUpper && nextIsLower) {
-                    // We have a transition from an upper to a lower letter here.  But we only
-                    // want to break if all the letters that preceded are uppercase.  i.e. if we
-                    // have "Foo" we don't want to break that into "F, oo".  But if we have
-                    // "IFoo" or "UIFoo", then we want to break that into "I, Foo" and "UI,
-                    // Foo".  i.e. the last uppercase letter belongs to the lowercase letters
-                    // that follows.  Note: this will make the following not split properly:
-                    // "HELLOthere".  However, these sorts of names do not show up in .Net
-                    // programs.
-                    for (var i = wordStart; i < index; i++) {
-                        if (!isUpperCaseLetter(identifier.charCodeAt(i))) {
-                            return false;
-                        }
-                    }
-                    return true;
-                }
-            }
-        }
-        return false;
-    }
-    function transitionFromLowerToUpper(identifier, word, index) {
-        var lastIsUpper = isUpperCaseLetter(identifier.charCodeAt(index - 1));
-        var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
-        // See if the casing indicates we're starting a new word. Note: if we're breaking on
-        // words, then just seeing an upper case character isn't enough.  Instead, it has to
-        // be uppercase and the previous character can't be uppercase.
-        //
-        // For example, breaking "AddMetadata" on words would make: Add Metadata
-        //
-        // on characters would be: A dd M etadata
-        //
-        // Break "AM" on words would be: AM
-        //
-        // on characters would be: A M
-        //
-        // We break the search string on characters.  But we break the symbol name on words.
-        var transition = word
-            ? (currentIsUpper && !lastIsUpper)
-            : currentIsUpper;
-        return transition;
-    }
-})(ts || (ts = {}));
-///<reference path='services.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var SignatureHelp;
-    (function (SignatureHelp) {
-        // A partially written generic type expression is not guaranteed to have the correct syntax tree. the expression could be parsed as less than/greater than expression or a comma expression
-        // or some other combination depending on what the user has typed so far. For the purposes of signature help we need to consider any location after "<" as a possible generic type reference. 
-        // To do this, the method will back parse the expression starting at the position required. it will try to parse the current expression as a generic type expression, if it did succeed it 
-        // will return the generic identifier that started the expression (e.g. "foo" in "foo<any, |"). It is then up to the caller to ensure that this is a valid generic expression through 
-        // looking up the type. The method will also keep track of the parameter index inside the expression.
-        // public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
-        //    let token = Syntax.findTokenOnLeft(syntaxTree.sourceUnit(), position, /*includeSkippedTokens*/ true);
-        //    if (token && TypeScript.Syntax.hasAncestorOfKind(token, TypeScript.SyntaxKind.TypeParameterList)) {
-        //        // We are in the wrong generic list. bail out
-        //        return null;
-        //    }
-        //    let stack = 0;
-        //    let argumentIndex = 0;
-        //    whileLoop:
-        //    while (token) {
-        //        switch (token.kind()) {
-        //            case TypeScript.SyntaxKind.LessThanToken:
-        //                if (stack === 0) {
-        //                    // Found the beginning of the generic argument expression
-        //                    let lessThanToken = token;
-        //                    token = previousToken(token, /*includeSkippedTokens*/ true);
-        //                    if (!token || token.kind() !== TypeScript.SyntaxKind.IdentifierName) {
-        //                        break whileLoop;
-        //                    }
-        //                    // Found the name, return the data
-        //                    return {
-        //                        genericIdentifer: token,
-        //                        lessThanToken: lessThanToken,
-        //                        argumentIndex: argumentIndex
-        //                    };
-        //                }
-        //                else if (stack < 0) {
-        //                    // Seen one too many less than tokens, bail out
-        //                    break whileLoop;
-        //                }
-        //                else {
-        //                    stack--;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.GreaterThanGreaterThanGreaterThanToken:
-        //                stack++;
-        //            // Intentional fall through
-        //            case TypeScript.SyntaxKind.GreaterThanToken:
-        //                stack++;
-        //                break;
-        //            case TypeScript.SyntaxKind.CommaToken:
-        //                if (stack == 0) {
-        //                    argumentIndex++;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.CloseBraceToken:
-        //                // This can be object type, skip untill we find the matching open brace token
-        //                let unmatchedOpenBraceTokens = 0;
-        //                // Skip untill the matching open brace token
-        //                token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseBraceToken, TypeScript.SyntaxKind.OpenBraceToken);
-        //                if (!token) {
-        //                    // No matching token was found. bail out
-        //                    break whileLoop;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.EqualsGreaterThanToken:
-        //                // This can be a function type or a constructor type. In either case, we want to skip the function definition
-        //                token = previousToken(token, /*includeSkippedTokens*/ true);
-        //                if (token && token.kind() === TypeScript.SyntaxKind.CloseParenToken) {
-        //                    // Skip untill the matching open paren token
-        //                    token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseParenToken, TypeScript.SyntaxKind.OpenParenToken);
-        //                    if (token && token.kind() === TypeScript.SyntaxKind.GreaterThanToken) {
-        //                        // Another generic type argument list, skip it\
-        //                        token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.GreaterThanToken, TypeScript.SyntaxKind.LessThanToken);
-        //                    }
-        //                    if (token && token.kind() === TypeScript.SyntaxKind.NewKeyword) {
-        //                        // In case this was a constructor type, skip the new keyword
-        //                        token = previousToken(token, /*includeSkippedTokens*/ true);
-        //                    }
-        //                    if (!token) {
-        //                        // No matching token was found. bail out
-        //                        break whileLoop;
-        //                    }
-        //                }
-        //                else {
-        //                    // This is not a function type. exit the main loop
-        //                    break whileLoop;
-        //                }
-        //                break;
-        //            case TypeScript.SyntaxKind.IdentifierName:
-        //            case TypeScript.SyntaxKind.AnyKeyword:
-        //            case TypeScript.SyntaxKind.NumberKeyword:
-        //            case TypeScript.SyntaxKind.StringKeyword:
-        //            case TypeScript.SyntaxKind.VoidKeyword:
-        //            case TypeScript.SyntaxKind.BooleanKeyword:
-        //            case TypeScript.SyntaxKind.DotToken:
-        //            case TypeScript.SyntaxKind.OpenBracketToken:
-        //            case TypeScript.SyntaxKind.CloseBracketToken:
-        //                // Valid tokens in a type name. Skip.
-        //                break;
-        //            default:
-        //                break whileLoop;
-        //        }
-        //        token = previousToken(token, /*includeSkippedTokens*/ true);
-        //    }
-        //    return null;
-        // }
-        // private static moveBackUpTillMatchingTokenKind(token: TypeScript.ISyntaxToken, tokenKind: TypeScript.SyntaxKind, matchingTokenKind: TypeScript.SyntaxKind): TypeScript.ISyntaxToken {
-        //    if (!token || token.kind() !== tokenKind) {
-        //        throw TypeScript.Errors.invalidOperation();
-        //    }
-        //    // Skip the current token
-        //    token = previousToken(token, /*includeSkippedTokens*/ true);
-        //    let stack = 0;
-        //    while (token) {
-        //        if (token.kind() === matchingTokenKind) {
-        //            if (stack === 0) {
-        //                // Found the matching token, return
-        //                return token;
-        //            }
-        //            else if (stack < 0) {
-        //                // tokens overlapped.. bail out.
-        //                break;
-        //            }
-        //            else {
-        //                stack--;
-        //            }
-        //        }
-        //        else if (token.kind() === tokenKind) {
-        //            stack++;
-        //        }
-        //        // Move back
-        //        token = previousToken(token, /*includeSkippedTokens*/ true);
-        //    }
-        //    // Did not find matching token
-        //    return null;
-        // }
-        var emptyArray = [];
-        var ArgumentListKind;
-        (function (ArgumentListKind) {
-            ArgumentListKind[ArgumentListKind["TypeArguments"] = 0] = "TypeArguments";
-            ArgumentListKind[ArgumentListKind["CallArguments"] = 1] = "CallArguments";
-            ArgumentListKind[ArgumentListKind["TaggedTemplateArguments"] = 2] = "TaggedTemplateArguments";
-        })(ArgumentListKind || (ArgumentListKind = {}));
-        function getSignatureHelpItems(program, sourceFile, position, cancellationToken) {
-            var typeChecker = program.getTypeChecker();
-            // Decide whether to show signature help
-            var startingToken = ts.findTokenOnLeftOfPosition(sourceFile, position);
-            if (!startingToken) {
-                // We are at the beginning of the file
-                return undefined;
-            }
-            var argumentInfo = getContainingArgumentInfo(startingToken);
-            cancellationToken.throwIfCancellationRequested();
-            // Semantic filtering of signature help
-            if (!argumentInfo) {
-                return undefined;
-            }
-            var call = argumentInfo.invocation;
-            var candidates = [];
-            var resolvedSignature = typeChecker.getResolvedSignature(call, candidates);
-            cancellationToken.throwIfCancellationRequested();
-            if (!candidates.length) {
-                // We didn't have any sig help items produced by the TS compiler.  If this is a JS 
-                // file, then see if we can figure out anything better.
-                if (ts.isSourceFileJavaScript(sourceFile)) {
-                    return createJavaScriptSignatureHelpItems(argumentInfo);
-                }
-                return undefined;
-            }
-            return createSignatureHelpItems(candidates, resolvedSignature, argumentInfo);
-            function createJavaScriptSignatureHelpItems(argumentInfo) {
-                if (argumentInfo.invocation.kind !== 174 /* CallExpression */) {
-                    return undefined;
-                }
-                // See if we can find some symbol with the call expression name that has call signatures.
-                var callExpression = argumentInfo.invocation;
-                var expression = callExpression.expression;
-                var name = expression.kind === 69 /* Identifier */
-                    ? expression
-                    : expression.kind === 172 /* PropertyAccessExpression */
-                        ? expression.name
-                        : undefined;
-                if (!name || !name.text) {
-                    return undefined;
-                }
-                var typeChecker = program.getTypeChecker();
-                for (var _i = 0, _a = program.getSourceFiles(); _i < _a.length; _i++) {
-                    var sourceFile_1 = _a[_i];
-                    var nameToDeclarations = sourceFile_1.getNamedDeclarations();
-                    var declarations = ts.getProperty(nameToDeclarations, name.text);
-                    if (declarations) {
-                        for (var _b = 0, declarations_8 = declarations; _b < declarations_8.length; _b++) {
-                            var declaration = declarations_8[_b];
-                            var symbol = declaration.symbol;
-                            if (symbol) {
-                                var type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
-                                if (type) {
-                                    var callSignatures = type.getCallSignatures();
-                                    if (callSignatures && callSignatures.length) {
-                                        return createSignatureHelpItems(callSignatures, callSignatures[0], argumentInfo);
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-            /**
-             * Returns relevant information for the argument list and the current argument if we are
-             * in the argument of an invocation; returns undefined otherwise.
-             */
-            function getImmediatelyContainingArgumentInfo(node) {
-                if (node.parent.kind === 174 /* CallExpression */ || node.parent.kind === 175 /* NewExpression */) {
-                    var callExpression = node.parent;
-                    // There are 3 cases to handle:
-                    //   1. The token introduces a list, and should begin a sig help session
-                    //   2. The token is either not associated with a list, or ends a list, so the session should end
-                    //   3. The token is buried inside a list, and should give sig help
-                    //
-                    // The following are examples of each:
-                    //
-                    //    Case 1:
-                    //          foo<#T, U>(#a, b)    -> The token introduces a list, and should begin a sig help session
-                    //    Case 2:
-                    //          fo#o<T, U>#(a, b)#   -> The token is either not associated with a list, or ends a list, so the session should end
-                    //    Case 3:
-                    //          foo<T#, U#>(a#, #b#) -> The token is buried inside a list, and should give sig help
-                    // Find out if 'node' is an argument, a type argument, or neither
-                    if (node.kind === 25 /* LessThanToken */ ||
-                        node.kind === 17 /* OpenParenToken */) {
-                        // Find the list that starts right *after* the < or ( token.
-                        // If the user has just opened a list, consider this item 0.
-                        var list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
-                        var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
-                        ts.Debug.assert(list !== undefined);
-                        return {
-                            kind: isTypeArgList ? 0 /* TypeArguments */ : 1 /* CallArguments */,
-                            invocation: callExpression,
-                            argumentsSpan: getApplicableSpanForArguments(list),
-                            argumentIndex: 0,
-                            argumentCount: getArgumentCount(list)
-                        };
-                    }
-                    // findListItemInfo can return undefined if we are not in parent's argument list
-                    // or type argument list. This includes cases where the cursor is:
-                    //   - To the right of the closing paren, non-substitution template, or template tail.
-                    //   - Between the type arguments and the arguments (greater than token)
-                    //   - On the target of the call (parent.func)
-                    //   - On the 'new' keyword in a 'new' expression
-                    var listItemInfo = ts.findListItemInfo(node);
-                    if (listItemInfo) {
-                        var list = listItemInfo.list;
-                        var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
-                        var argumentIndex = getArgumentIndex(list, node);
-                        var argumentCount = getArgumentCount(list);
-                        ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
-                        return {
-                            kind: isTypeArgList ? 0 /* TypeArguments */ : 1 /* CallArguments */,
-                            invocation: callExpression,
-                            argumentsSpan: getApplicableSpanForArguments(list),
-                            argumentIndex: argumentIndex,
-                            argumentCount: argumentCount
-                        };
-                    }
-                }
-                else if (node.kind === 11 /* NoSubstitutionTemplateLiteral */ && node.parent.kind === 176 /* TaggedTemplateExpression */) {
-                    // Check if we're actually inside the template;
-                    // otherwise we'll fall out and return undefined.
-                    if (ts.isInsideTemplateLiteral(node, position)) {
-                        return getArgumentListInfoForTemplate(node.parent, /*argumentIndex*/ 0);
-                    }
-                }
-                else if (node.kind === 12 /* TemplateHead */ && node.parent.parent.kind === 176 /* TaggedTemplateExpression */) {
-                    var templateExpression = node.parent;
-                    var tagExpression = templateExpression.parent;
-                    ts.Debug.assert(templateExpression.kind === 189 /* TemplateExpression */);
-                    var argumentIndex = ts.isInsideTemplateLiteral(node, position) ? 0 : 1;
-                    return getArgumentListInfoForTemplate(tagExpression, argumentIndex);
-                }
-                else if (node.parent.kind === 197 /* TemplateSpan */ && node.parent.parent.parent.kind === 176 /* TaggedTemplateExpression */) {
-                    var templateSpan = node.parent;
-                    var templateExpression = templateSpan.parent;
-                    var tagExpression = templateExpression.parent;
-                    ts.Debug.assert(templateExpression.kind === 189 /* TemplateExpression */);
-                    // If we're just after a template tail, don't show signature help.
-                    if (node.kind === 14 /* TemplateTail */ && !ts.isInsideTemplateLiteral(node, position)) {
-                        return undefined;
-                    }
-                    var spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
-                    var argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node);
-                    return getArgumentListInfoForTemplate(tagExpression, argumentIndex);
-                }
-                return undefined;
-            }
-            function getArgumentIndex(argumentsList, node) {
-                // The list we got back can include commas.  In the presence of errors it may 
-                // also just have nodes without commas.  For example "Foo(a b c)" will have 3 
-                // args without commas.   We want to find what index we're at.  So we count
-                // forward until we hit ourselves, only incrementing the index if it isn't a
-                // comma.
-                //
-                // Note: the subtlety around trailing commas (in getArgumentCount) does not apply
-                // here.  That's because we're only walking forward until we hit the node we're
-                // on.  In that case, even if we're after the trailing comma, we'll still see
-                // that trailing comma in the list, and we'll have generated the appropriate
-                // arg index.
-                var argumentIndex = 0;
-                var listChildren = argumentsList.getChildren();
-                for (var _i = 0, listChildren_1 = listChildren; _i < listChildren_1.length; _i++) {
-                    var child = listChildren_1[_i];
-                    if (child === node) {
-                        break;
-                    }
-                    if (child.kind !== 24 /* CommaToken */) {
-                        argumentIndex++;
-                    }
-                }
-                return argumentIndex;
-            }
-            function getArgumentCount(argumentsList) {
-                // The argument count for a list is normally the number of non-comma children it has.
-                // For example, if you have "Foo(a,b)" then there will be three children of the arg
-                // list 'a' '<comma>' 'b'.  So, in this case the arg count will be 2.  However, there
-                // is a small subtlety.  If you have  "Foo(a,)", then the child list will just have
-                // 'a' '<comma>'.  So, in the case where the last child is a comma, we increase the
-                // arg count by one to compensate.
-                //
-                // Note: this subtlety only applies to the last comma.  If you had "Foo(a,,"  then 
-                // we'll have:  'a' '<comma>' '<missing>' 
-                // That will give us 2 non-commas.  We then add one for the last comma, givin us an
-                // arg count of 3.
-                var listChildren = argumentsList.getChildren();
-                var argumentCount = ts.countWhere(listChildren, function (arg) { return arg.kind !== 24 /* CommaToken */; });
-                if (listChildren.length > 0 && ts.lastOrUndefined(listChildren).kind === 24 /* CommaToken */) {
-                    argumentCount++;
-                }
-                return argumentCount;
-            }
-            // spanIndex is either the index for a given template span.
-            // This does not give appropriate results for a NoSubstitutionTemplateLiteral
-            function getArgumentIndexForTemplatePiece(spanIndex, node) {
-                // Because the TemplateStringsArray is the first argument, we have to offset each substitution expression by 1.
-                // There are three cases we can encounter:
-                //      1. We are precisely in the template literal (argIndex = 0).
-                //      2. We are in or to the right of the substitution expression (argIndex = spanIndex + 1).
-                //      3. We are directly to the right of the template literal, but because we look for the token on the left,
-                //          not enough to put us in the substitution expression; we should consider ourselves part of
-                //          the *next* span's expression by offsetting the index (argIndex = (spanIndex + 1) + 1).
-                //
-                // Example: f  `# abcd $#{#  1 + 1#  }# efghi ${ #"#hello"#  }  #  `
-                //              ^       ^ ^       ^   ^          ^ ^      ^     ^
-                // Case:        1       1 3       2   1          3 2      2     1
-                ts.Debug.assert(position >= node.getStart(), "Assumed 'position' could not occur before node.");
-                if (ts.isTemplateLiteralKind(node.kind)) {
-                    if (ts.isInsideTemplateLiteral(node, position)) {
-                        return 0;
-                    }
-                    return spanIndex + 2;
-                }
-                return spanIndex + 1;
-            }
-            function getArgumentListInfoForTemplate(tagExpression, argumentIndex) {
-                // argumentCount is either 1 or (numSpans + 1) to account for the template strings array argument.
-                var argumentCount = tagExpression.template.kind === 11 /* NoSubstitutionTemplateLiteral */
-                    ? 1
-                    : tagExpression.template.templateSpans.length + 1;
-                ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
-                return {
-                    kind: 2 /* TaggedTemplateArguments */,
-                    invocation: tagExpression,
-                    argumentsSpan: getApplicableSpanForTaggedTemplate(tagExpression),
-                    argumentIndex: argumentIndex,
-                    argumentCount: argumentCount
-                };
-            }
-            function getApplicableSpanForArguments(argumentsList) {
-                // We use full start and skip trivia on the end because we want to include trivia on
-                // both sides. For example,
-                //
-                //    foo(   /*comment */     a, b, c      /*comment*/     )
-                //        |                                               |
-                //
-                // The applicable span is from the first bar to the second bar (inclusive,
-                // but not including parentheses)
-                var applicableSpanStart = argumentsList.getFullStart();
-                var applicableSpanEnd = ts.skipTrivia(sourceFile.text, argumentsList.getEnd(), /*stopAfterLineBreak*/ false);
-                return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
-            }
-            function getApplicableSpanForTaggedTemplate(taggedTemplate) {
-                var template = taggedTemplate.template;
-                var applicableSpanStart = template.getStart();
-                var applicableSpanEnd = template.getEnd();
-                // We need to adjust the end position for the case where the template does not have a tail.
-                // Otherwise, we will not show signature help past the expression.
-                // For example,
-                //
-                //      `  ${ 1 + 1        foo(10)
-                //       |        |
-                //
-                // This is because a Missing node has no width. However, what we actually want is to include trivia
-                // leading up to the next token in case the user is about to type in a TemplateMiddle or TemplateTail.
-                if (template.kind === 189 /* TemplateExpression */) {
-                    var lastSpan = ts.lastOrUndefined(template.templateSpans);
-                    if (lastSpan.literal.getFullWidth() === 0) {
-                        applicableSpanEnd = ts.skipTrivia(sourceFile.text, applicableSpanEnd, /*stopAfterLineBreak*/ false);
-                    }
-                }
-                return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
-            }
-            function getContainingArgumentInfo(node) {
-                for (var n = node; n.kind !== 256 /* SourceFile */; n = n.parent) {
-                    if (ts.isFunctionBlock(n)) {
-                        return undefined;
-                    }
-                    // If the node is not a subspan of its parent, this is a big problem.
-                    // There have been crashes that might be caused by this violation.
-                    if (n.pos < n.parent.pos || n.end > n.parent.end) {
-                        ts.Debug.fail("Node of kind " + n.kind + " is not a subspan of its parent of kind " + n.parent.kind);
-                    }
-                    var argumentInfo_1 = getImmediatelyContainingArgumentInfo(n);
-                    if (argumentInfo_1) {
-                        return argumentInfo_1;
-                    }
-                }
-                return undefined;
-            }
-            function getChildListThatStartsWithOpenerToken(parent, openerToken, sourceFile) {
-                var children = parent.getChildren(sourceFile);
-                var indexOfOpenerToken = children.indexOf(openerToken);
-                ts.Debug.assert(indexOfOpenerToken >= 0 && children.length > indexOfOpenerToken + 1);
-                return children[indexOfOpenerToken + 1];
-            }
-            /**
-             * The selectedItemIndex could be negative for several reasons.
-             *     1. There are too many arguments for all of the overloads
-             *     2. None of the overloads were type compatible
-             * The solution here is to try to pick the best overload by picking
-             * either the first one that has an appropriate number of parameters,
-             * or the one with the most parameters.
-             */
-            function selectBestInvalidOverloadIndex(candidates, argumentCount) {
-                var maxParamsSignatureIndex = -1;
-                var maxParams = -1;
-                for (var i = 0; i < candidates.length; i++) {
-                    var candidate = candidates[i];
-                    if (candidate.hasRestParameter || candidate.parameters.length >= argumentCount) {
-                        return i;
-                    }
-                    if (candidate.parameters.length > maxParams) {
-                        maxParams = candidate.parameters.length;
-                        maxParamsSignatureIndex = i;
-                    }
-                }
-                return maxParamsSignatureIndex;
-            }
-            function createSignatureHelpItems(candidates, bestSignature, argumentListInfo) {
-                var applicableSpan = argumentListInfo.argumentsSpan;
-                var isTypeParameterList = argumentListInfo.kind === 0 /* TypeArguments */;
-                var invocation = argumentListInfo.invocation;
-                var callTarget = ts.getInvokedExpression(invocation);
-                var callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
-                var callTargetDisplayParts = callTargetSymbol && ts.symbolToDisplayParts(typeChecker, callTargetSymbol, /*enclosingDeclaration*/ undefined, /*meaning*/ undefined);
-                var items = ts.map(candidates, function (candidateSignature) {
-                    var signatureHelpParameters;
-                    var prefixDisplayParts = [];
-                    var suffixDisplayParts = [];
-                    if (callTargetDisplayParts) {
-                        ts.addRange(prefixDisplayParts, callTargetDisplayParts);
-                    }
-                    if (isTypeParameterList) {
-                        prefixDisplayParts.push(ts.punctuationPart(25 /* LessThanToken */));
-                        var typeParameters = candidateSignature.typeParameters;
-                        signatureHelpParameters = typeParameters && typeParameters.length > 0 ? ts.map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
-                        suffixDisplayParts.push(ts.punctuationPart(27 /* GreaterThanToken */));
-                        var parameterParts = ts.mapToDisplayParts(function (writer) {
-                            return typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisType, candidateSignature.parameters, writer, invocation);
-                        });
-                        ts.addRange(suffixDisplayParts, parameterParts);
-                    }
-                    else {
-                        var typeParameterParts = ts.mapToDisplayParts(function (writer) {
-                            return typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation);
-                        });
-                        ts.addRange(prefixDisplayParts, typeParameterParts);
-                        prefixDisplayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
-                        var parameters = candidateSignature.parameters;
-                        signatureHelpParameters = parameters.length > 0 ? ts.map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
-                        suffixDisplayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
-                    }
-                    var returnTypeParts = ts.mapToDisplayParts(function (writer) {
-                        return typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation);
-                    });
-                    ts.addRange(suffixDisplayParts, returnTypeParts);
-                    return {
-                        isVariadic: candidateSignature.hasRestParameter,
-                        prefixDisplayParts: prefixDisplayParts,
-                        suffixDisplayParts: suffixDisplayParts,
-                        separatorDisplayParts: [ts.punctuationPart(24 /* CommaToken */), ts.spacePart()],
-                        parameters: signatureHelpParameters,
-                        documentation: candidateSignature.getDocumentationComment()
-                    };
-                });
-                var argumentIndex = argumentListInfo.argumentIndex;
-                // argumentCount is the *apparent* number of arguments.
-                var argumentCount = argumentListInfo.argumentCount;
-                var selectedItemIndex = candidates.indexOf(bestSignature);
-                if (selectedItemIndex < 0) {
-                    selectedItemIndex = selectBestInvalidOverloadIndex(candidates, argumentCount);
-                }
-                ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
-                return {
-                    items: items,
-                    applicableSpan: applicableSpan,
-                    selectedItemIndex: selectedItemIndex,
-                    argumentIndex: argumentIndex,
-                    argumentCount: argumentCount
-                };
-                function createSignatureHelpParameterForParameter(parameter) {
-                    var displayParts = ts.mapToDisplayParts(function (writer) {
-                        return typeChecker.getSymbolDisplayBuilder().buildParameterDisplay(parameter, writer, invocation);
-                    });
-                    return {
-                        name: parameter.name,
-                        documentation: parameter.getDocumentationComment(),
-                        displayParts: displayParts,
-                        isOptional: typeChecker.isOptionalParameter(parameter.valueDeclaration)
-                    };
-                }
-                function createSignatureHelpParameterForTypeParameter(typeParameter) {
-                    var displayParts = ts.mapToDisplayParts(function (writer) {
-                        return typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(typeParameter, writer, invocation);
-                    });
-                    return {
-                        name: typeParameter.symbol.name,
-                        documentation: emptyArray,
-                        displayParts: displayParts,
-                        isOptional: false
-                    };
-                }
-            }
-        }
-        SignatureHelp.getSignatureHelpItems = getSignatureHelpItems;
-    })(SignatureHelp = ts.SignatureHelp || (ts.SignatureHelp = {}));
-})(ts || (ts = {}));
-// These utilities are common to multiple language service features.
-/* @internal */
-var ts;
-(function (ts) {
-    function getLineStartPositionForPosition(position, sourceFile) {
-        var lineStarts = sourceFile.getLineStarts();
-        var line = sourceFile.getLineAndCharacterOfPosition(position).line;
-        return lineStarts[line];
-    }
-    ts.getLineStartPositionForPosition = getLineStartPositionForPosition;
-    function rangeContainsRange(r1, r2) {
-        return startEndContainsRange(r1.pos, r1.end, r2);
-    }
-    ts.rangeContainsRange = rangeContainsRange;
-    function startEndContainsRange(start, end, range) {
-        return start <= range.pos && end >= range.end;
-    }
-    ts.startEndContainsRange = startEndContainsRange;
-    function rangeContainsStartEnd(range, start, end) {
-        return range.pos <= start && range.end >= end;
-    }
-    ts.rangeContainsStartEnd = rangeContainsStartEnd;
-    function rangeOverlapsWithStartEnd(r1, start, end) {
-        return startEndOverlapsWithStartEnd(r1.pos, r1.end, start, end);
-    }
-    ts.rangeOverlapsWithStartEnd = rangeOverlapsWithStartEnd;
-    function startEndOverlapsWithStartEnd(start1, end1, start2, end2) {
-        var start = Math.max(start1, start2);
-        var end = Math.min(end1, end2);
-        return start < end;
-    }
-    ts.startEndOverlapsWithStartEnd = startEndOverlapsWithStartEnd;
-    function positionBelongsToNode(candidate, position, sourceFile) {
-        return candidate.end > position || !isCompletedNode(candidate, sourceFile);
-    }
-    ts.positionBelongsToNode = positionBelongsToNode;
-    function isCompletedNode(n, sourceFile) {
-        if (ts.nodeIsMissing(n)) {
-            return false;
-        }
-        switch (n.kind) {
-            case 221 /* ClassDeclaration */:
-            case 222 /* InterfaceDeclaration */:
-            case 224 /* EnumDeclaration */:
-            case 171 /* ObjectLiteralExpression */:
-            case 167 /* ObjectBindingPattern */:
-            case 159 /* TypeLiteral */:
-            case 199 /* Block */:
-            case 226 /* ModuleBlock */:
-            case 227 /* CaseBlock */:
-                return nodeEndsWith(n, 16 /* CloseBraceToken */, sourceFile);
-            case 252 /* CatchClause */:
-                return isCompletedNode(n.block, sourceFile);
-            case 175 /* NewExpression */:
-                if (!n.arguments) {
-                    return true;
-                }
-            // fall through
-            case 174 /* CallExpression */:
-            case 178 /* ParenthesizedExpression */:
-            case 164 /* ParenthesizedType */:
-                return nodeEndsWith(n, 18 /* CloseParenToken */, sourceFile);
-            case 156 /* FunctionType */:
-            case 157 /* ConstructorType */:
-                return isCompletedNode(n.type, sourceFile);
-            case 148 /* Constructor */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-            case 152 /* ConstructSignature */:
-            case 151 /* CallSignature */:
-            case 180 /* ArrowFunction */:
-                if (n.body) {
-                    return isCompletedNode(n.body, sourceFile);
-                }
-                if (n.type) {
-                    return isCompletedNode(n.type, sourceFile);
-                }
-                // Even though type parameters can be unclosed, we can get away with
-                // having at least a closing paren.
-                return hasChildOfKind(n, 18 /* CloseParenToken */, sourceFile);
-            case 225 /* ModuleDeclaration */:
-                return n.body && isCompletedNode(n.body, sourceFile);
-            case 203 /* IfStatement */:
-                if (n.elseStatement) {
-                    return isCompletedNode(n.elseStatement, sourceFile);
-                }
-                return isCompletedNode(n.thenStatement, sourceFile);
-            case 202 /* ExpressionStatement */:
-                return isCompletedNode(n.expression, sourceFile) ||
-                    hasChildOfKind(n, 23 /* SemicolonToken */);
-            case 170 /* ArrayLiteralExpression */:
-            case 168 /* ArrayBindingPattern */:
-            case 173 /* ElementAccessExpression */:
-            case 140 /* ComputedPropertyName */:
-            case 161 /* TupleType */:
-                return nodeEndsWith(n, 20 /* CloseBracketToken */, sourceFile);
-            case 153 /* IndexSignature */:
-                if (n.type) {
-                    return isCompletedNode(n.type, sourceFile);
-                }
-                return hasChildOfKind(n, 20 /* CloseBracketToken */, sourceFile);
-            case 249 /* CaseClause */:
-            case 250 /* DefaultClause */:
-                // there is no such thing as terminator token for CaseClause/DefaultClause so for simplicity always consider them non-completed
-                return false;
-            case 206 /* ForStatement */:
-            case 207 /* ForInStatement */:
-            case 208 /* ForOfStatement */:
-            case 205 /* WhileStatement */:
-                return isCompletedNode(n.statement, sourceFile);
-            case 204 /* DoStatement */:
-                // rough approximation: if DoStatement has While keyword - then if node is completed is checking the presence of ')';
-                var hasWhileKeyword = findChildOfKind(n, 104 /* WhileKeyword */, sourceFile);
-                if (hasWhileKeyword) {
-                    return nodeEndsWith(n, 18 /* CloseParenToken */, sourceFile);
-                }
-                return isCompletedNode(n.statement, sourceFile);
-            case 158 /* TypeQuery */:
-                return isCompletedNode(n.exprName, sourceFile);
-            case 182 /* TypeOfExpression */:
-            case 181 /* DeleteExpression */:
-            case 183 /* VoidExpression */:
-            case 190 /* YieldExpression */:
-            case 191 /* SpreadElementExpression */:
-                var unaryWordExpression = n;
-                return isCompletedNode(unaryWordExpression.expression, sourceFile);
-            case 176 /* TaggedTemplateExpression */:
-                return isCompletedNode(n.template, sourceFile);
-            case 189 /* TemplateExpression */:
-                var lastSpan = ts.lastOrUndefined(n.templateSpans);
-                return isCompletedNode(lastSpan, sourceFile);
-            case 197 /* TemplateSpan */:
-                return ts.nodeIsPresent(n.literal);
-            case 185 /* PrefixUnaryExpression */:
-                return isCompletedNode(n.operand, sourceFile);
-            case 187 /* BinaryExpression */:
-                return isCompletedNode(n.right, sourceFile);
-            case 188 /* ConditionalExpression */:
-                return isCompletedNode(n.whenFalse, sourceFile);
-            default:
-                return true;
-        }
-    }
-    ts.isCompletedNode = isCompletedNode;
-    /*
-     * Checks if node ends with 'expectedLastToken'.
-     * If child at position 'length - 1' is 'SemicolonToken' it is skipped and 'expectedLastToken' is compared with child at position 'length - 2'.
-     */
-    function nodeEndsWith(n, expectedLastToken, sourceFile) {
-        var children = n.getChildren(sourceFile);
-        if (children.length) {
-            var last = ts.lastOrUndefined(children);
-            if (last.kind === expectedLastToken) {
-                return true;
-            }
-            else if (last.kind === 23 /* SemicolonToken */ && children.length !== 1) {
-                return children[children.length - 2].kind === expectedLastToken;
-            }
-        }
-        return false;
-    }
-    function findListItemInfo(node) {
-        var list = findContainingList(node);
-        // It is possible at this point for syntaxList to be undefined, either if
-        // node.parent had no list child, or if none of its list children contained
-        // the span of node. If this happens, return undefined. The caller should
-        // handle this case.
-        if (!list) {
-            return undefined;
-        }
-        var children = list.getChildren();
-        var listItemIndex = ts.indexOf(children, node);
-        return {
-            listItemIndex: listItemIndex,
-            list: list
-        };
-    }
-    ts.findListItemInfo = findListItemInfo;
-    function hasChildOfKind(n, kind, sourceFile) {
-        return !!findChildOfKind(n, kind, sourceFile);
-    }
-    ts.hasChildOfKind = hasChildOfKind;
-    function findChildOfKind(n, kind, sourceFile) {
-        return ts.forEach(n.getChildren(sourceFile), function (c) { return c.kind === kind && c; });
-    }
-    ts.findChildOfKind = findChildOfKind;
-    function findContainingList(node) {
-        // The node might be a list element (nonsynthetic) or a comma (synthetic). Either way, it will
-        // be parented by the container of the SyntaxList, not the SyntaxList itself.
-        // In order to find the list item index, we first need to locate SyntaxList itself and then search
-        // for the position of the relevant node (or comma).
-        var syntaxList = ts.forEach(node.parent.getChildren(), function (c) {
-            // find syntax list that covers the span of the node
-            if (c.kind === 279 /* SyntaxList */ && c.pos <= node.pos && c.end >= node.end) {
-                return c;
-            }
-        });
-        // Either we didn't find an appropriate list, or the list must contain us.
-        ts.Debug.assert(!syntaxList || ts.contains(syntaxList.getChildren(), node));
-        return syntaxList;
-    }
-    ts.findContainingList = findContainingList;
-    /* Gets the token whose text has range [start, end) and
-     * position >= start and (position < end or (position === end && token is keyword or identifier))
-     */
-    function getTouchingWord(sourceFile, position) {
-        return getTouchingToken(sourceFile, position, function (n) { return isWord(n.kind); });
-    }
-    ts.getTouchingWord = getTouchingWord;
-    /* Gets the token whose text has range [start, end) and position >= start
-     * and (position < end or (position === end && token is keyword or identifier or numeric/string literal))
-     */
-    function getTouchingPropertyName(sourceFile, position) {
-        return getTouchingToken(sourceFile, position, function (n) { return isPropertyName(n.kind); });
-    }
-    ts.getTouchingPropertyName = getTouchingPropertyName;
-    /** Returns the token if position is in [start, end) or if position === end and includeItemAtEndPosition(token) === true */
-    function getTouchingToken(sourceFile, position, includeItemAtEndPosition) {
-        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ false, includeItemAtEndPosition);
-    }
-    ts.getTouchingToken = getTouchingToken;
-    /** Returns a token if position is in [start-of-leading-trivia, end) */
-    function getTokenAtPosition(sourceFile, position) {
-        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includeItemAtEndPosition*/ undefined);
-    }
-    ts.getTokenAtPosition = getTokenAtPosition;
-    /** Get the token whose text contains the position */
-    function getTokenAtPositionWorker(sourceFile, position, allowPositionInLeadingTrivia, includeItemAtEndPosition) {
-        var current = sourceFile;
-        outer: while (true) {
-            if (isToken(current)) {
-                // exit early
-                return current;
-            }
-            // find the child that contains 'position'
-            for (var i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
-                var child = current.getChildAt(i);
-                var start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile);
-                if (start <= position) {
-                    var end = child.getEnd();
-                    if (position < end || (position === end && child.kind === 1 /* EndOfFileToken */)) {
-                        current = child;
-                        continue outer;
-                    }
-                    else if (includeItemAtEndPosition && end === position) {
-                        var previousToken = findPrecedingToken(position, sourceFile, child);
-                        if (previousToken && includeItemAtEndPosition(previousToken)) {
-                            return previousToken;
-                        }
-                    }
-                }
-            }
-            return current;
-        }
-    }
-    /**
-      * The token on the left of the position is the token that strictly includes the position
-      * or sits to the left of the cursor if it is on a boundary. For example
-      *
-      *   fo|o               -> will return foo
-      *   foo <comment> |bar -> will return foo
-      *
-      */
-    function findTokenOnLeftOfPosition(file, position) {
-        // Ideally, getTokenAtPosition should return a token. However, it is currently
-        // broken, so we do a check to make sure the result was indeed a token.
-        var tokenAtPosition = getTokenAtPosition(file, position);
-        if (isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
-            return tokenAtPosition;
-        }
-        return findPrecedingToken(position, file);
-    }
-    ts.findTokenOnLeftOfPosition = findTokenOnLeftOfPosition;
-    function findNextToken(previousToken, parent) {
-        return find(parent);
-        function find(n) {
-            if (isToken(n) && n.pos === previousToken.end) {
-                // this is token that starts at the end of previous token - return it
-                return n;
-            }
-            var children = n.getChildren();
-            for (var _i = 0, children_1 = children; _i < children_1.length; _i++) {
-                var child = children_1[_i];
-                var shouldDiveInChildNode = 
-                // previous token is enclosed somewhere in the child
-                (child.pos <= previousToken.pos && child.end > previousToken.end) ||
-                    // previous token ends exactly at the beginning of child
-                    (child.pos === previousToken.end);
-                if (shouldDiveInChildNode && nodeHasTokens(child)) {
-                    return find(child);
-                }
-            }
-            return undefined;
-        }
-    }
-    ts.findNextToken = findNextToken;
-    function findPrecedingToken(position, sourceFile, startNode) {
-        return find(startNode || sourceFile);
-        function findRightmostToken(n) {
-            if (isToken(n) || n.kind === 244 /* JsxText */) {
-                return n;
-            }
-            var children = n.getChildren();
-            var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
-            return candidate && findRightmostToken(candidate);
-        }
-        function find(n) {
-            if (isToken(n) || n.kind === 244 /* JsxText */) {
-                return n;
-            }
-            var children = n.getChildren();
-            for (var i = 0, len = children.length; i < len; i++) {
-                var child = children[i];
-                // condition 'position < child.end' checks if child node end after the position
-                // in the example below this condition will be false for 'aaaa' and 'bbbb' and true for 'ccc'
-                // aaaa___bbbb___$__ccc
-                // after we found child node with end after the position we check if start of the node is after the position.
-                // if yes - then position is in the trivia and we need to look into the previous child to find the token in question.
-                // if no - position is in the node itself so we should recurse in it.
-                // NOTE: JsxText is a weird kind of node that can contain only whitespaces (since they are not counted as trivia).
-                // if this is the case - then we should assume that token in question is located in previous child.
-                if (position < child.end && (nodeHasTokens(child) || child.kind === 244 /* JsxText */)) {
-                    var start = child.getStart(sourceFile);
-                    var lookInPreviousChild = (start >= position) ||
-                        (child.kind === 244 /* JsxText */ && start === child.end); // whitespace only JsxText
-                    if (lookInPreviousChild) {
-                        // actual start of the node is past the position - previous token should be at the end of previous child
-                        var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ i);
-                        return candidate && findRightmostToken(candidate);
-                    }
-                    else {
-                        // candidate should be in this node
-                        return find(child);
-                    }
-                }
-            }
-            ts.Debug.assert(startNode !== undefined || n.kind === 256 /* SourceFile */);
-            // Here we know that none of child token nodes embrace the position,
-            // the only known case is when position is at the end of the file.
-            // Try to find the rightmost token in the file without filtering.
-            // Namely we are skipping the check: 'position < node.end'
-            if (children.length) {
-                var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
-                return candidate && findRightmostToken(candidate);
-            }
-        }
-        /// finds last node that is considered as candidate for search (isCandidate(node) === true) starting from 'exclusiveStartPosition'
-        function findRightmostChildNodeWithTokens(children, exclusiveStartPosition) {
-            for (var i = exclusiveStartPosition - 1; i >= 0; i--) {
-                if (nodeHasTokens(children[i])) {
-                    return children[i];
-                }
-            }
-        }
-    }
-    ts.findPrecedingToken = findPrecedingToken;
-    function isInString(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        return token && (token.kind === 9 /* StringLiteral */ || token.kind === 166 /* StringLiteralType */) && position > token.getStart(sourceFile);
-    }
-    ts.isInString = isInString;
-    function isInComment(sourceFile, position) {
-        return isInCommentHelper(sourceFile, position, /*predicate*/ undefined);
-    }
-    ts.isInComment = isInComment;
-    /**
-     * returns true if the position is in between the open and close elements of an JSX expression.
-     */
-    function isInsideJsxElementOrAttribute(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        if (!token) {
-            return false;
-        }
-        // <div>Hello |</div>
-        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 244 /* JsxText */) {
-            return true;
-        }
-        // <div> { | </div> or <div a={| </div>
-        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 248 /* JsxExpression */) {
-            return true;
-        }
-        // <div> { 
-        // |
-        // } < /div>
-        if (token && token.kind === 16 /* CloseBraceToken */ && token.parent.kind === 248 /* JsxExpression */) {
-            return true;
-        }
-        // <div>|</div>
-        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 245 /* JsxClosingElement */) {
-            return true;
-        }
-        return false;
-    }
-    ts.isInsideJsxElementOrAttribute = isInsideJsxElementOrAttribute;
-    function isInTemplateString(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        return ts.isTemplateLiteralKind(token.kind) && position > token.getStart(sourceFile);
-    }
-    ts.isInTemplateString = isInTemplateString;
-    /**
-     * Returns true if the cursor at position in sourceFile is within a comment that additionally
-     * satisfies predicate, and false otherwise.
-     */
-    function isInCommentHelper(sourceFile, position, predicate) {
-        var token = getTokenAtPosition(sourceFile, position);
-        if (token && position <= token.getStart(sourceFile)) {
-            var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
-            // The end marker of a single-line comment does not include the newline character.
-            // In the following case, we are inside a comment (^ denotes the cursor position):
-            //
-            //    // asdf   ^\n
-            //
-            // But for multi-line comments, we don't want to be inside the comment in the following case:
-            //
-            //    /* asdf */^
-            //
-            // Internally, we represent the end of the comment at the newline and closing '/', respectively.
-            return predicate ?
-                ts.forEach(commentRanges, function (c) { return c.pos < position &&
-                    (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end) &&
-                    predicate(c); }) :
-                ts.forEach(commentRanges, function (c) { return c.pos < position &&
-                    (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end); });
-        }
-        return false;
-    }
-    ts.isInCommentHelper = isInCommentHelper;
-    function hasDocComment(sourceFile, position) {
-        var token = getTokenAtPosition(sourceFile, position);
-        // First, we have to see if this position actually landed in a comment.
-        var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
-        return ts.forEach(commentRanges, jsDocPrefix);
-        function jsDocPrefix(c) {
-            var text = sourceFile.text;
-            return text.length >= c.pos + 3 && text[c.pos] === "/" && text[c.pos + 1] === "*" && text[c.pos + 2] === "*";
-        }
-    }
-    ts.hasDocComment = hasDocComment;
-    /**
-     * Get the corresponding JSDocTag node if the position is in a jsDoc comment
-     */
-    function getJsDocTagAtPosition(sourceFile, position) {
-        var node = ts.getTokenAtPosition(sourceFile, position);
-        if (isToken(node)) {
-            switch (node.kind) {
-                case 102 /* VarKeyword */:
-                case 108 /* LetKeyword */:
-                case 74 /* ConstKeyword */:
-                    // if the current token is var, let or const, skip the VariableDeclarationList
-                    node = node.parent === undefined ? undefined : node.parent.parent;
-                    break;
-                default:
-                    node = node.parent;
-                    break;
-            }
-        }
-        if (node) {
-            var jsDocComment = node.jsDocComment;
-            if (jsDocComment) {
-                for (var _i = 0, _a = jsDocComment.tags; _i < _a.length; _i++) {
-                    var tag = _a[_i];
-                    if (tag.pos <= position && position <= tag.end) {
-                        return tag;
-                    }
-                }
-            }
-        }
-        return undefined;
-    }
-    ts.getJsDocTagAtPosition = getJsDocTagAtPosition;
-    function nodeHasTokens(n) {
-        // If we have a token or node that has a non-zero width, it must have tokens.
-        // Note, that getWidth() does not take trivia into account.
-        return n.getWidth() !== 0;
-    }
-    function getNodeModifiers(node) {
-        var flags = ts.getCombinedNodeFlags(node);
-        var result = [];
-        if (flags & 8 /* Private */)
-            result.push(ts.ScriptElementKindModifier.privateMemberModifier);
-        if (flags & 16 /* Protected */)
-            result.push(ts.ScriptElementKindModifier.protectedMemberModifier);
-        if (flags & 4 /* Public */)
-            result.push(ts.ScriptElementKindModifier.publicMemberModifier);
-        if (flags & 32 /* Static */)
-            result.push(ts.ScriptElementKindModifier.staticModifier);
-        if (flags & 128 /* Abstract */)
-            result.push(ts.ScriptElementKindModifier.abstractModifier);
-        if (flags & 1 /* Export */)
-            result.push(ts.ScriptElementKindModifier.exportedModifier);
-        if (ts.isInAmbientContext(node))
-            result.push(ts.ScriptElementKindModifier.ambientModifier);
-        return result.length > 0 ? result.join(",") : ts.ScriptElementKindModifier.none;
-    }
-    ts.getNodeModifiers = getNodeModifiers;
-    function getTypeArgumentOrTypeParameterList(node) {
-        if (node.kind === 155 /* TypeReference */ || node.kind === 174 /* CallExpression */) {
-            return node.typeArguments;
-        }
-        if (ts.isFunctionLike(node) || node.kind === 221 /* ClassDeclaration */ || node.kind === 222 /* InterfaceDeclaration */) {
-            return node.typeParameters;
-        }
-        return undefined;
-    }
-    ts.getTypeArgumentOrTypeParameterList = getTypeArgumentOrTypeParameterList;
-    function isToken(n) {
-        return n.kind >= 0 /* FirstToken */ && n.kind <= 138 /* LastToken */;
-    }
-    ts.isToken = isToken;
-    function isWord(kind) {
-        return kind === 69 /* Identifier */ || ts.isKeyword(kind);
-    }
-    ts.isWord = isWord;
-    function isPropertyName(kind) {
-        return kind === 9 /* StringLiteral */ || kind === 8 /* NumericLiteral */ || isWord(kind);
-    }
-    function isComment(kind) {
-        return kind === 2 /* SingleLineCommentTrivia */ || kind === 3 /* MultiLineCommentTrivia */;
-    }
-    ts.isComment = isComment;
-    function isStringOrRegularExpressionOrTemplateLiteral(kind) {
-        if (kind === 9 /* StringLiteral */
-            || kind === 166 /* StringLiteralType */
-            || kind === 10 /* RegularExpressionLiteral */
-            || ts.isTemplateLiteralKind(kind)) {
-            return true;
-        }
-        return false;
-    }
-    ts.isStringOrRegularExpressionOrTemplateLiteral = isStringOrRegularExpressionOrTemplateLiteral;
-    function isPunctuation(kind) {
-        return 15 /* FirstPunctuation */ <= kind && kind <= 68 /* LastPunctuation */;
-    }
-    ts.isPunctuation = isPunctuation;
-    function isInsideTemplateLiteral(node, position) {
-        return ts.isTemplateLiteralKind(node.kind)
-            && (node.getStart() < position && position < node.getEnd()) || (!!node.isUnterminated && position === node.getEnd());
-    }
-    ts.isInsideTemplateLiteral = isInsideTemplateLiteral;
-    function isAccessibilityModifier(kind) {
-        switch (kind) {
-            case 112 /* PublicKeyword */:
-            case 110 /* PrivateKeyword */:
-            case 111 /* ProtectedKeyword */:
-                return true;
-        }
-        return false;
-    }
-    ts.isAccessibilityModifier = isAccessibilityModifier;
-    function compareDataObjects(dst, src) {
-        for (var e in dst) {
-            if (typeof dst[e] === "object") {
-                if (!compareDataObjects(dst[e], src[e])) {
-                    return false;
-                }
-            }
-            else if (typeof dst[e] !== "function") {
-                if (dst[e] !== src[e]) {
-                    return false;
-                }
-            }
-        }
-        return true;
-    }
-    ts.compareDataObjects = compareDataObjects;
-    function isArrayLiteralOrObjectLiteralDestructuringPattern(node) {
-        if (node.kind === 170 /* ArrayLiteralExpression */ ||
-            node.kind === 171 /* ObjectLiteralExpression */) {
-            // [a,b,c] from:
-            // [a, b, c] = someExpression;
-            if (node.parent.kind === 187 /* BinaryExpression */ &&
-                node.parent.left === node &&
-                node.parent.operatorToken.kind === 56 /* EqualsToken */) {
-                return true;
-            }
-            // [a, b, c] from:
-            // for([a, b, c] of expression)
-            if (node.parent.kind === 208 /* ForOfStatement */ &&
-                node.parent.initializer === node) {
-                return true;
-            }
-            // [a, b, c] of
-            // [x, [a, b, c] ] = someExpression
-            // or 
-            // {x, a: {a, b, c} } = someExpression
-            if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.kind === 253 /* PropertyAssignment */ ? node.parent.parent : node.parent)) {
-                return true;
-            }
-        }
-        return false;
-    }
-    ts.isArrayLiteralOrObjectLiteralDestructuringPattern = isArrayLiteralOrObjectLiteralDestructuringPattern;
-})(ts || (ts = {}));
-// Display-part writer helpers
-/* @internal */
-var ts;
-(function (ts) {
-    function isFirstDeclarationOfSymbolParameter(symbol) {
-        return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === 142 /* Parameter */;
-    }
-    ts.isFirstDeclarationOfSymbolParameter = isFirstDeclarationOfSymbolParameter;
-    var displayPartWriter = getDisplayPartWriter();
-    function getDisplayPartWriter() {
-        var displayParts;
-        var lineStart;
-        var indent;
-        resetWriter();
-        return {
-            displayParts: function () { return displayParts; },
-            writeKeyword: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.keyword); },
-            writeOperator: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.operator); },
-            writePunctuation: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.punctuation); },
-            writeSpace: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.space); },
-            writeStringLiteral: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.stringLiteral); },
-            writeParameter: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.parameterName); },
-            writeSymbol: writeSymbol,
-            writeLine: writeLine,
-            increaseIndent: function () { indent++; },
-            decreaseIndent: function () { indent--; },
-            clear: resetWriter,
-            trackSymbol: function () { },
-            reportInaccessibleThisError: function () { }
-        };
-        function writeIndent() {
-            if (lineStart) {
-                var indentString = ts.getIndentString(indent);
-                if (indentString) {
-                    displayParts.push(displayPart(indentString, ts.SymbolDisplayPartKind.space));
-                }
-                lineStart = false;
-            }
-        }
-        function writeKind(text, kind) {
-            writeIndent();
-            displayParts.push(displayPart(text, kind));
-        }
-        function writeSymbol(text, symbol) {
-            writeIndent();
-            displayParts.push(symbolPart(text, symbol));
-        }
-        function writeLine() {
-            displayParts.push(lineBreakPart());
-            lineStart = true;
-        }
-        function resetWriter() {
-            displayParts = [];
-            lineStart = true;
-            indent = 0;
-        }
-    }
-    function symbolPart(text, symbol) {
-        return displayPart(text, displayPartKind(symbol), symbol);
-        function displayPartKind(symbol) {
-            var flags = symbol.flags;
-            if (flags & 3 /* Variable */) {
-                return isFirstDeclarationOfSymbolParameter(symbol) ? ts.SymbolDisplayPartKind.parameterName : ts.SymbolDisplayPartKind.localName;
-            }
-            else if (flags & 4 /* Property */) {
-                return ts.SymbolDisplayPartKind.propertyName;
-            }
-            else if (flags & 32768 /* GetAccessor */) {
-                return ts.SymbolDisplayPartKind.propertyName;
-            }
-            else if (flags & 65536 /* SetAccessor */) {
-                return ts.SymbolDisplayPartKind.propertyName;
-            }
-            else if (flags & 8 /* EnumMember */) {
-                return ts.SymbolDisplayPartKind.enumMemberName;
-            }
-            else if (flags & 16 /* Function */) {
-                return ts.SymbolDisplayPartKind.functionName;
-            }
-            else if (flags & 32 /* Class */) {
-                return ts.SymbolDisplayPartKind.className;
-            }
-            else if (flags & 64 /* Interface */) {
-                return ts.SymbolDisplayPartKind.interfaceName;
-            }
-            else if (flags & 384 /* Enum */) {
-                return ts.SymbolDisplayPartKind.enumName;
-            }
-            else if (flags & 1536 /* Module */) {
-                return ts.SymbolDisplayPartKind.moduleName;
-            }
-            else if (flags & 8192 /* Method */) {
-                return ts.SymbolDisplayPartKind.methodName;
-            }
-            else if (flags & 262144 /* TypeParameter */) {
-                return ts.SymbolDisplayPartKind.typeParameterName;
-            }
-            else if (flags & 524288 /* TypeAlias */) {
-                return ts.SymbolDisplayPartKind.aliasName;
-            }
-            else if (flags & 8388608 /* Alias */) {
-                return ts.SymbolDisplayPartKind.aliasName;
-            }
-            return ts.SymbolDisplayPartKind.text;
-        }
-    }
-    ts.symbolPart = symbolPart;
-    function displayPart(text, kind, symbol) {
-        return {
-            text: text,
-            kind: ts.SymbolDisplayPartKind[kind]
-        };
-    }
-    ts.displayPart = displayPart;
-    function spacePart() {
-        return displayPart(" ", ts.SymbolDisplayPartKind.space);
-    }
-    ts.spacePart = spacePart;
-    function keywordPart(kind) {
-        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.keyword);
-    }
-    ts.keywordPart = keywordPart;
-    function punctuationPart(kind) {
-        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.punctuation);
-    }
-    ts.punctuationPart = punctuationPart;
-    function operatorPart(kind) {
-        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.operator);
-    }
-    ts.operatorPart = operatorPart;
-    function textOrKeywordPart(text) {
-        var kind = ts.stringToToken(text);
-        return kind === undefined
-            ? textPart(text)
-            : keywordPart(kind);
-    }
-    ts.textOrKeywordPart = textOrKeywordPart;
-    function textPart(text) {
-        return displayPart(text, ts.SymbolDisplayPartKind.text);
-    }
-    ts.textPart = textPart;
-    var carriageReturnLineFeed = "\r\n";
-    /**
-     * The default is CRLF.
-     */
-    function getNewLineOrDefaultFromHost(host) {
-        return host.getNewLine ? host.getNewLine() : carriageReturnLineFeed;
-    }
-    ts.getNewLineOrDefaultFromHost = getNewLineOrDefaultFromHost;
-    function lineBreakPart() {
-        return displayPart("\n", ts.SymbolDisplayPartKind.lineBreak);
-    }
-    ts.lineBreakPart = lineBreakPart;
-    function mapToDisplayParts(writeDisplayParts) {
-        writeDisplayParts(displayPartWriter);
-        var result = displayPartWriter.displayParts();
-        displayPartWriter.clear();
-        return result;
-    }
-    ts.mapToDisplayParts = mapToDisplayParts;
-    function typeToDisplayParts(typechecker, type, enclosingDeclaration, flags) {
-        return mapToDisplayParts(function (writer) {
-            typechecker.getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
-        });
-    }
-    ts.typeToDisplayParts = typeToDisplayParts;
-    function symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration, meaning, flags) {
-        return mapToDisplayParts(function (writer) {
-            typeChecker.getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags);
-        });
-    }
-    ts.symbolToDisplayParts = symbolToDisplayParts;
-    function signatureToDisplayParts(typechecker, signature, enclosingDeclaration, flags) {
-        return mapToDisplayParts(function (writer) {
-            typechecker.getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags);
-        });
-    }
-    ts.signatureToDisplayParts = signatureToDisplayParts;
-    function getDeclaredName(typeChecker, symbol, location) {
-        // If this is an export or import specifier it could have been renamed using the 'as' syntax.
-        // If so we want to search for whatever is under the cursor.
-        if (isImportOrExportSpecifierName(location)) {
-            return location.getText();
-        }
-        else if (ts.isStringOrNumericLiteral(location.kind) &&
-            location.parent.kind === 140 /* ComputedPropertyName */) {
-            return location.text;
-        }
-        // Try to get the local symbol if we're dealing with an 'export default'
-        // since that symbol has the "true" name.
-        var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
-        var name = typeChecker.symbolToString(localExportDefaultSymbol || symbol);
-        return name;
-    }
-    ts.getDeclaredName = getDeclaredName;
-    function isImportOrExportSpecifierName(location) {
-        return location.parent &&
-            (location.parent.kind === 234 /* ImportSpecifier */ || location.parent.kind === 238 /* ExportSpecifier */) &&
-            location.parent.propertyName === location;
-    }
-    ts.isImportOrExportSpecifierName = isImportOrExportSpecifierName;
-    /**
-     * Strip off existed single quotes or double quotes from a given string
-     *
-     * @return non-quoted string
-     */
-    function stripQuotes(name) {
-        var length = name.length;
-        if (length >= 2 &&
-            name.charCodeAt(0) === name.charCodeAt(length - 1) &&
-            (name.charCodeAt(0) === 34 /* doubleQuote */ || name.charCodeAt(0) === 39 /* singleQuote */)) {
-            return name.substring(1, length - 1);
-        }
-        ;
-        return name;
-    }
-    ts.stripQuotes = stripQuotes;
-    function scriptKindIs(fileName, host) {
-        var scriptKinds = [];
-        for (var _i = 2; _i < arguments.length; _i++) {
-            scriptKinds[_i - 2] = arguments[_i];
-        }
-        var scriptKind = getScriptKind(fileName, host);
-        return ts.forEach(scriptKinds, function (k) { return k === scriptKind; });
-    }
-    ts.scriptKindIs = scriptKindIs;
-    function getScriptKind(fileName, host) {
-        // First check to see if the script kind was specified by the host. Chances are the host
-        // may override the default script kind for the file extension.
-        var scriptKind;
-        if (host && host.getScriptKind) {
-            scriptKind = host.getScriptKind(fileName);
-        }
-        if (!scriptKind || scriptKind === 0 /* Unknown */) {
-            scriptKind = ts.getScriptKindFromFileName(fileName);
-        }
-        return ts.ensureScriptKind(fileName, scriptKind);
-    }
-    ts.getScriptKind = getScriptKind;
-})(ts || (ts = {}));
-// Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0.
-// See LICENSE.txt in the project root for complete license information.
-/// <reference path='services.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var JsTyping;
-    (function (JsTyping) {
-        ;
-        ;
-        // A map of loose file names to library names
-        // that we are confident require typings
-        var safeList;
-        /**
-         * @param host is the object providing I/O related operations.
-         * @param fileNames are the file names that belong to the same project
-         * @param projectRootPath is the path to the project root directory
-         * @param safeListPath is the path used to retrieve the safe list
-         * @param packageNameToTypingLocation is the map of package names to their cached typing locations
-         * @param typingOptions are used to customize the typing inference process
-         * @param compilerOptions are used as a source for typing inference
-         */
-        function discoverTypings(host, fileNames, projectRootPath, safeListPath, packageNameToTypingLocation, typingOptions, compilerOptions) {
-            // A typing name to typing file path mapping
-            var inferredTypings = {};
-            if (!typingOptions || !typingOptions.enableAutoDiscovery) {
-                return { cachedTypingPaths: [], newTypingNames: [], filesToWatch: [] };
-            }
-            // Only infer typings for .js and .jsx files
-            fileNames = ts.filter(ts.map(fileNames, ts.normalizePath), function (f) { return ts.scriptKindIs(f, /*LanguageServiceHost*/ undefined, 1 /* JS */, 2 /* JSX */); });
-            if (!safeList) {
-                var result = ts.readConfigFile(safeListPath, function (path) { return host.readFile(path); });
-                if (result.config) {
-                    safeList = result.config;
-                }
-                else {
-                    safeList = {};
-                }
-                ;
-            }
-            var filesToWatch = [];
-            // Directories to search for package.json, bower.json and other typing information
-            var searchDirs = [];
-            var exclude = [];
-            mergeTypings(typingOptions.include);
-            exclude = typingOptions.exclude || [];
-            var possibleSearchDirs = ts.map(fileNames, ts.getDirectoryPath);
-            if (projectRootPath !== undefined) {
-                possibleSearchDirs.push(projectRootPath);
-            }
-            searchDirs = ts.deduplicate(possibleSearchDirs);
-            for (var _i = 0, searchDirs_1 = searchDirs; _i < searchDirs_1.length; _i++) {
-                var searchDir = searchDirs_1[_i];
-                var packageJsonPath = ts.combinePaths(searchDir, "package.json");
-                getTypingNamesFromJson(packageJsonPath, filesToWatch);
-                var bowerJsonPath = ts.combinePaths(searchDir, "bower.json");
-                getTypingNamesFromJson(bowerJsonPath, filesToWatch);
-                var nodeModulesPath = ts.combinePaths(searchDir, "node_modules");
-                getTypingNamesFromNodeModuleFolder(nodeModulesPath);
-            }
-            getTypingNamesFromSourceFileNames(fileNames);
-            // Add the cached typing locations for inferred typings that are already installed
-            for (var name_37 in packageNameToTypingLocation) {
-                if (ts.hasProperty(inferredTypings, name_37) && !inferredTypings[name_37]) {
-                    inferredTypings[name_37] = packageNameToTypingLocation[name_37];
-                }
-            }
-            // Remove typings that the user has added to the exclude list
-            for (var _a = 0, exclude_1 = exclude; _a < exclude_1.length; _a++) {
-                var excludeTypingName = exclude_1[_a];
-                delete inferredTypings[excludeTypingName];
-            }
-            var newTypingNames = [];
-            var cachedTypingPaths = [];
-            for (var typing in inferredTypings) {
-                if (inferredTypings[typing] !== undefined) {
-                    cachedTypingPaths.push(inferredTypings[typing]);
-                }
-                else {
-                    newTypingNames.push(typing);
-                }
-            }
-            return { cachedTypingPaths: cachedTypingPaths, newTypingNames: newTypingNames, filesToWatch: filesToWatch };
-            /**
-             * Merge a given list of typingNames to the inferredTypings map
-             */
-            function mergeTypings(typingNames) {
-                if (!typingNames) {
-                    return;
-                }
-                for (var _i = 0, typingNames_1 = typingNames; _i < typingNames_1.length; _i++) {
-                    var typing = typingNames_1[_i];
-                    if (!ts.hasProperty(inferredTypings, typing)) {
-                        inferredTypings[typing] = undefined;
-                    }
-                }
-            }
-            /**
-             * Get the typing info from common package manager json files like package.json or bower.json
-             */
-            function getTypingNamesFromJson(jsonPath, filesToWatch) {
-                var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); });
-                if (result.config) {
-                    var jsonConfig = result.config;
-                    filesToWatch.push(jsonPath);
-                    if (jsonConfig.dependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.dependencies));
-                    }
-                    if (jsonConfig.devDependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.devDependencies));
-                    }
-                    if (jsonConfig.optionalDependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.optionalDependencies));
-                    }
-                    if (jsonConfig.peerDependencies) {
-                        mergeTypings(ts.getKeys(jsonConfig.peerDependencies));
-                    }
-                }
-            }
-            /**
-             * Infer typing names from given file names. For example, the file name "jquery-min.2.3.4.js"
-             * should be inferred to the 'jquery' typing name; and "angular-route.1.2.3.js" should be inferred
-             * to the 'angular-route' typing name.
-             * @param fileNames are the names for source files in the project
-             */
-            function getTypingNamesFromSourceFileNames(fileNames) {
-                var jsFileNames = ts.filter(fileNames, ts.hasJavaScriptFileExtension);
-                var inferredTypingNames = ts.map(jsFileNames, function (f) { return ts.removeFileExtension(ts.getBaseFileName(f.toLowerCase())); });
-                var cleanedTypingNames = ts.map(inferredTypingNames, function (f) { return f.replace(/((?:\.|-)min(?=\.|$))|((?:-|\.)\d+)/g, ""); });
-                if (safeList === undefined) {
-                    mergeTypings(cleanedTypingNames);
-                }
-                else {
-                    mergeTypings(ts.filter(cleanedTypingNames, function (f) { return ts.hasProperty(safeList, f); }));
-                }
-                var hasJsxFile = ts.forEach(fileNames, function (f) { return ts.scriptKindIs(f, /*LanguageServiceHost*/ undefined, 2 /* JSX */); });
-                if (hasJsxFile) {
-                    mergeTypings(["react"]);
-                }
-            }
-            /**
-             * Infer typing names from node_module folder
-             * @param nodeModulesPath is the path to the "node_modules" folder
-             */
-            function getTypingNamesFromNodeModuleFolder(nodeModulesPath) {
-                // Todo: add support for ModuleResolutionHost too
-                if (!host.directoryExists(nodeModulesPath)) {
-                    return;
-                }
-                var typingNames = [];
-                var fileNames = host.readDirectory(nodeModulesPath, "*.json", /*exclude*/ undefined, /*depth*/ 2);
-                for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
-                    var fileName = fileNames_1[_i];
-                    var normalizedFileName = ts.normalizePath(fileName);
-                    if (ts.getBaseFileName(normalizedFileName) !== "package.json") {
-                        continue;
-                    }
-                    var result = ts.readConfigFile(normalizedFileName, function (path) { return host.readFile(path); });
-                    if (!result.config) {
-                        continue;
-                    }
-                    var packageJson = result.config;
-                    // npm 3's package.json contains a "_requiredBy" field
-                    // we should include all the top level module names for npm 2, and only module names whose
-                    // "_requiredBy" field starts with "#" or equals "/" for npm 3.
-                    if (packageJson._requiredBy &&
-                        ts.filter(packageJson._requiredBy, function (r) { return r[0] === "#" || r === "/"; }).length === 0) {
-                        continue;
-                    }
-                    // If the package has its own d.ts typings, those will take precedence. Otherwise the package name will be used
-                    // to download d.ts files from DefinitelyTyped
-                    if (!packageJson.name) {
-                        continue;
-                    }
-                    if (packageJson.typings) {
-                        var absolutePath = ts.getNormalizedAbsolutePath(packageJson.typings, ts.getDirectoryPath(normalizedFileName));
-                        inferredTypings[packageJson.name] = absolutePath;
-                    }
-                    else {
-                        typingNames.push(packageJson.name);
-                    }
-                }
-                mergeTypings(typingNames);
-            }
-        }
-        JsTyping.discoverTypings = discoverTypings;
-    })(JsTyping = ts.JsTyping || (ts.JsTyping = {}));
-})(ts || (ts = {}));
-/// <reference path="formatting.ts"/>
-/// <reference path="..\..\compiler\scanner.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var standardScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, 0 /* Standard */);
-        var jsxScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, 1 /* JSX */);
-        /**
-         * Scanner that is currently used for formatting
-         */
-        var scanner;
-        var ScanAction;
-        (function (ScanAction) {
-            ScanAction[ScanAction["Scan"] = 0] = "Scan";
-            ScanAction[ScanAction["RescanGreaterThanToken"] = 1] = "RescanGreaterThanToken";
-            ScanAction[ScanAction["RescanSlashToken"] = 2] = "RescanSlashToken";
-            ScanAction[ScanAction["RescanTemplateToken"] = 3] = "RescanTemplateToken";
-            ScanAction[ScanAction["RescanJsxIdentifier"] = 4] = "RescanJsxIdentifier";
-        })(ScanAction || (ScanAction = {}));
-        function getFormattingScanner(sourceFile, startPos, endPos) {
-            ts.Debug.assert(scanner === undefined);
-            scanner = sourceFile.languageVariant === 1 /* JSX */ ? jsxScanner : standardScanner;
-            scanner.setText(sourceFile.text);
-            scanner.setTextPos(startPos);
-            var wasNewLine = true;
-            var leadingTrivia;
-            var trailingTrivia;
-            var savedPos;
-            var lastScanAction;
-            var lastTokenInfo;
-            return {
-                advance: advance,
-                readTokenInfo: readTokenInfo,
-                isOnToken: isOnToken,
-                getCurrentLeadingTrivia: function () { return leadingTrivia; },
-                lastTrailingTriviaWasNewLine: function () { return wasNewLine; },
-                close: function () {
-                    ts.Debug.assert(scanner !== undefined);
-                    lastTokenInfo = undefined;
-                    scanner.setText(undefined);
-                    scanner = undefined;
-                }
-            };
-            function advance() {
-                ts.Debug.assert(scanner !== undefined);
-                lastTokenInfo = undefined;
-                var isStarted = scanner.getStartPos() !== startPos;
-                if (isStarted) {
-                    if (trailingTrivia) {
-                        ts.Debug.assert(trailingTrivia.length !== 0);
-                        wasNewLine = ts.lastOrUndefined(trailingTrivia).kind === 4 /* NewLineTrivia */;
-                    }
-                    else {
-                        wasNewLine = false;
-                    }
-                }
-                leadingTrivia = undefined;
-                trailingTrivia = undefined;
-                if (!isStarted) {
-                    scanner.scan();
-                }
-                var pos = scanner.getStartPos();
-                // Read leading trivia and token
-                while (pos < endPos) {
-                    var t = scanner.getToken();
-                    if (!ts.isTrivia(t)) {
-                        break;
-                    }
-                    // consume leading trivia
-                    scanner.scan();
-                    var item = {
-                        pos: pos,
-                        end: scanner.getStartPos(),
-                        kind: t
-                    };
-                    pos = scanner.getStartPos();
-                    if (!leadingTrivia) {
-                        leadingTrivia = [];
-                    }
-                    leadingTrivia.push(item);
-                }
-                savedPos = scanner.getStartPos();
-            }
-            function shouldRescanGreaterThanToken(node) {
-                if (node) {
-                    switch (node.kind) {
-                        case 29 /* GreaterThanEqualsToken */:
-                        case 64 /* GreaterThanGreaterThanEqualsToken */:
-                        case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                        case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                        case 44 /* GreaterThanGreaterThanToken */:
-                            return true;
-                    }
-                }
-                return false;
-            }
-            function shouldRescanJsxIdentifier(node) {
-                if (node.parent) {
-                    switch (node.parent.kind) {
-                        case 246 /* JsxAttribute */:
-                        case 243 /* JsxOpeningElement */:
-                        case 245 /* JsxClosingElement */:
-                        case 242 /* JsxSelfClosingElement */:
-                            return node.kind === 69 /* Identifier */;
-                    }
-                }
-                return false;
-            }
-            function shouldRescanSlashToken(container) {
-                return container.kind === 10 /* RegularExpressionLiteral */;
-            }
-            function shouldRescanTemplateToken(container) {
-                return container.kind === 13 /* TemplateMiddle */ ||
-                    container.kind === 14 /* TemplateTail */;
-            }
-            function startsWithSlashToken(t) {
-                return t === 39 /* SlashToken */ || t === 61 /* SlashEqualsToken */;
-            }
-            function readTokenInfo(n) {
-                ts.Debug.assert(scanner !== undefined);
-                if (!isOnToken()) {
-                    // scanner is not on the token (either advance was not called yet or scanner is already past the end position)
-                    return {
-                        leadingTrivia: leadingTrivia,
-                        trailingTrivia: undefined,
-                        token: undefined
-                    };
-                }
-                // normally scanner returns the smallest available token
-                // check the kind of context node to determine if scanner should have more greedy behavior and consume more text.
-                var expectedScanAction = shouldRescanGreaterThanToken(n)
-                    ? 1 /* RescanGreaterThanToken */
-                    : shouldRescanSlashToken(n)
-                        ? 2 /* RescanSlashToken */
-                        : shouldRescanTemplateToken(n)
-                            ? 3 /* RescanTemplateToken */
-                            : shouldRescanJsxIdentifier(n)
-                                ? 4 /* RescanJsxIdentifier */
-                                : 0 /* Scan */;
-                if (lastTokenInfo && expectedScanAction === lastScanAction) {
-                    // readTokenInfo was called before with the same expected scan action.
-                    // No need to re-scan text, return existing 'lastTokenInfo'
-                    // it is ok to call fixTokenKind here since it does not affect
-                    // what portion of text is consumed. In contrast rescanning can change it,
-                    // i.e. for '>=' when originally scanner eats just one character
-                    // and rescanning forces it to consume more.
-                    return fixTokenKind(lastTokenInfo, n);
-                }
-                if (scanner.getStartPos() !== savedPos) {
-                    ts.Debug.assert(lastTokenInfo !== undefined);
-                    // readTokenInfo was called before but scan action differs - rescan text
-                    scanner.setTextPos(savedPos);
-                    scanner.scan();
-                }
-                var currentToken = scanner.getToken();
-                if (expectedScanAction === 1 /* RescanGreaterThanToken */ && currentToken === 27 /* GreaterThanToken */) {
-                    currentToken = scanner.reScanGreaterToken();
-                    ts.Debug.assert(n.kind === currentToken);
-                    lastScanAction = 1 /* RescanGreaterThanToken */;
-                }
-                else if (expectedScanAction === 2 /* RescanSlashToken */ && startsWithSlashToken(currentToken)) {
-                    currentToken = scanner.reScanSlashToken();
-                    ts.Debug.assert(n.kind === currentToken);
-                    lastScanAction = 2 /* RescanSlashToken */;
-                }
-                else if (expectedScanAction === 3 /* RescanTemplateToken */ && currentToken === 16 /* CloseBraceToken */) {
-                    currentToken = scanner.reScanTemplateToken();
-                    lastScanAction = 3 /* RescanTemplateToken */;
-                }
-                else if (expectedScanAction === 4 /* RescanJsxIdentifier */ && currentToken === 69 /* Identifier */) {
-                    currentToken = scanner.scanJsxIdentifier();
-                    lastScanAction = 4 /* RescanJsxIdentifier */;
-                }
-                else {
-                    lastScanAction = 0 /* Scan */;
-                }
-                var token = {
-                    pos: scanner.getStartPos(),
-                    end: scanner.getTextPos(),
-                    kind: currentToken
-                };
-                // consume trailing trivia
-                if (trailingTrivia) {
-                    trailingTrivia = undefined;
-                }
-                while (scanner.getStartPos() < endPos) {
-                    currentToken = scanner.scan();
-                    if (!ts.isTrivia(currentToken)) {
-                        break;
-                    }
-                    var trivia = {
-                        pos: scanner.getStartPos(),
-                        end: scanner.getTextPos(),
-                        kind: currentToken
-                    };
-                    if (!trailingTrivia) {
-                        trailingTrivia = [];
-                    }
-                    trailingTrivia.push(trivia);
-                    if (currentToken === 4 /* NewLineTrivia */) {
-                        // move past new line
-                        scanner.scan();
-                        break;
-                    }
-                }
-                lastTokenInfo = {
-                    leadingTrivia: leadingTrivia,
-                    trailingTrivia: trailingTrivia,
-                    token: token
-                };
-                return fixTokenKind(lastTokenInfo, n);
-            }
-            function isOnToken() {
-                ts.Debug.assert(scanner !== undefined);
-                var current = (lastTokenInfo && lastTokenInfo.token.kind) || scanner.getToken();
-                var startPos = (lastTokenInfo && lastTokenInfo.token.pos) || scanner.getStartPos();
-                return startPos < endPos && current !== 1 /* EndOfFileToken */ && !ts.isTrivia(current);
-            }
-            // when containing node in the tree is token 
-            // but its kind differs from the kind that was returned by the scanner,
-            // then kind needs to be fixed. This might happen in cases 
-            // when parser interprets token differently, i.e keyword treated as identifier
-            function fixTokenKind(tokenInfo, container) {
-                if (ts.isToken(container) && tokenInfo.token.kind !== container.kind) {
-                    tokenInfo.token.kind = container.kind;
-                }
-                return tokenInfo;
-            }
-        }
-        formatting.getFormattingScanner = getFormattingScanner;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-/// <reference path="references.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var FormattingContext = (function () {
-            function FormattingContext(sourceFile, formattingRequestKind) {
-                this.sourceFile = sourceFile;
-                this.formattingRequestKind = formattingRequestKind;
-            }
-            FormattingContext.prototype.updateContext = function (currentRange, currentTokenParent, nextRange, nextTokenParent, commonParent) {
-                ts.Debug.assert(currentRange !== undefined, "currentTokenSpan is null");
-                ts.Debug.assert(currentTokenParent !== undefined, "currentTokenParent is null");
-                ts.Debug.assert(nextRange !== undefined, "nextTokenSpan is null");
-                ts.Debug.assert(nextTokenParent !== undefined, "nextTokenParent is null");
-                ts.Debug.assert(commonParent !== undefined, "commonParent is null");
-                this.currentTokenSpan = currentRange;
-                this.currentTokenParent = currentTokenParent;
-                this.nextTokenSpan = nextRange;
-                this.nextTokenParent = nextTokenParent;
-                this.contextNode = commonParent;
-                // drop cached results
-                this.contextNodeAllOnSameLine = undefined;
-                this.nextNodeAllOnSameLine = undefined;
-                this.tokensAreOnSameLine = undefined;
-                this.contextNodeBlockIsOnOneLine = undefined;
-                this.nextNodeBlockIsOnOneLine = undefined;
-            };
-            FormattingContext.prototype.ContextNodeAllOnSameLine = function () {
-                if (this.contextNodeAllOnSameLine === undefined) {
-                    this.contextNodeAllOnSameLine = this.NodeIsOnOneLine(this.contextNode);
-                }
-                return this.contextNodeAllOnSameLine;
-            };
-            FormattingContext.prototype.NextNodeAllOnSameLine = function () {
-                if (this.nextNodeAllOnSameLine === undefined) {
-                    this.nextNodeAllOnSameLine = this.NodeIsOnOneLine(this.nextTokenParent);
-                }
-                return this.nextNodeAllOnSameLine;
-            };
-            FormattingContext.prototype.TokensAreOnSameLine = function () {
-                if (this.tokensAreOnSameLine === undefined) {
-                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(this.currentTokenSpan.pos).line;
-                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(this.nextTokenSpan.pos).line;
-                    this.tokensAreOnSameLine = (startLine === endLine);
-                }
-                return this.tokensAreOnSameLine;
-            };
-            FormattingContext.prototype.ContextNodeBlockIsOnOneLine = function () {
-                if (this.contextNodeBlockIsOnOneLine === undefined) {
-                    this.contextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.contextNode);
-                }
-                return this.contextNodeBlockIsOnOneLine;
-            };
-            FormattingContext.prototype.NextNodeBlockIsOnOneLine = function () {
-                if (this.nextNodeBlockIsOnOneLine === undefined) {
-                    this.nextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.nextTokenParent);
-                }
-                return this.nextNodeBlockIsOnOneLine;
-            };
-            FormattingContext.prototype.NodeIsOnOneLine = function (node) {
-                var startLine = this.sourceFile.getLineAndCharacterOfPosition(node.getStart(this.sourceFile)).line;
-                var endLine = this.sourceFile.getLineAndCharacterOfPosition(node.getEnd()).line;
-                return startLine === endLine;
-            };
-            FormattingContext.prototype.BlockIsOnOneLine = function (node) {
-                var openBrace = ts.findChildOfKind(node, 15 /* OpenBraceToken */, this.sourceFile);
-                var closeBrace = ts.findChildOfKind(node, 16 /* CloseBraceToken */, this.sourceFile);
-                if (openBrace && closeBrace) {
-                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(openBrace.getEnd()).line;
-                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(closeBrace.getStart(this.sourceFile)).line;
-                    return startLine === endLine;
-                }
-                return false;
-            };
-            return FormattingContext;
-        }());
-        formatting.FormattingContext = FormattingContext;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-/// <reference path="references.ts"/>
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        (function (FormattingRequestKind) {
-            FormattingRequestKind[FormattingRequestKind["FormatDocument"] = 0] = "FormatDocument";
-            FormattingRequestKind[FormattingRequestKind["FormatSelection"] = 1] = "FormatSelection";
-            FormattingRequestKind[FormattingRequestKind["FormatOnEnter"] = 2] = "FormatOnEnter";
-            FormattingRequestKind[FormattingRequestKind["FormatOnSemicolon"] = 3] = "FormatOnSemicolon";
-            FormattingRequestKind[FormattingRequestKind["FormatOnClosingCurlyBrace"] = 4] = "FormatOnClosingCurlyBrace";
-        })(formatting.FormattingRequestKind || (formatting.FormattingRequestKind = {}));
-        var FormattingRequestKind = formatting.FormattingRequestKind;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Rule = (function () {
-            function Rule(Descriptor, Operation, Flag) {
-                if (Flag === void 0) { Flag = 0 /* None */; }
-                this.Descriptor = Descriptor;
-                this.Operation = Operation;
-                this.Flag = Flag;
-            }
-            Rule.prototype.toString = function () {
-                return "[desc=" + this.Descriptor + "," +
-                    "operation=" + this.Operation + "," +
-                    "flag=" + this.Flag + "]";
-            };
-            return Rule;
-        }());
-        formatting.Rule = Rule;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        (function (RuleAction) {
-            RuleAction[RuleAction["Ignore"] = 1] = "Ignore";
-            RuleAction[RuleAction["Space"] = 2] = "Space";
-            RuleAction[RuleAction["NewLine"] = 4] = "NewLine";
-            RuleAction[RuleAction["Delete"] = 8] = "Delete";
-        })(formatting.RuleAction || (formatting.RuleAction = {}));
-        var RuleAction = formatting.RuleAction;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RuleDescriptor = (function () {
-            function RuleDescriptor(LeftTokenRange, RightTokenRange) {
-                this.LeftTokenRange = LeftTokenRange;
-                this.RightTokenRange = RightTokenRange;
-            }
-            RuleDescriptor.prototype.toString = function () {
-                return "[leftRange=" + this.LeftTokenRange + "," +
-                    "rightRange=" + this.RightTokenRange + "]";
-            };
-            RuleDescriptor.create1 = function (left, right) {
-                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), formatting.Shared.TokenRange.FromToken(right));
-            };
-            RuleDescriptor.create2 = function (left, right) {
-                return RuleDescriptor.create4(left, formatting.Shared.TokenRange.FromToken(right));
-            };
-            RuleDescriptor.create3 = function (left, right) {
-                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), right);
-            };
-            RuleDescriptor.create4 = function (left, right) {
-                return new RuleDescriptor(left, right);
-            };
-            return RuleDescriptor;
-        }());
-        formatting.RuleDescriptor = RuleDescriptor;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        (function (RuleFlags) {
-            RuleFlags[RuleFlags["None"] = 0] = "None";
-            RuleFlags[RuleFlags["CanDeleteNewLines"] = 1] = "CanDeleteNewLines";
-        })(formatting.RuleFlags || (formatting.RuleFlags = {}));
-        var RuleFlags = formatting.RuleFlags;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* tslint:disable:no-null-keyword */
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RuleOperation = (function () {
-            function RuleOperation() {
-                this.Context = null;
-                this.Action = null;
-            }
-            RuleOperation.prototype.toString = function () {
-                return "[context=" + this.Context + "," +
-                    "action=" + this.Action + "]";
-            };
-            RuleOperation.create1 = function (action) {
-                return RuleOperation.create2(formatting.RuleOperationContext.Any, action);
-            };
-            RuleOperation.create2 = function (context, action) {
-                var result = new RuleOperation();
-                result.Context = context;
-                result.Action = action;
-                return result;
-            };
-            return RuleOperation;
-        }());
-        formatting.RuleOperation = RuleOperation;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RuleOperationContext = (function () {
-            function RuleOperationContext() {
-                var funcs = [];
-                for (var _i = 0; _i < arguments.length; _i++) {
-                    funcs[_i - 0] = arguments[_i];
-                }
-                this.customContextChecks = funcs;
-            }
-            RuleOperationContext.prototype.IsAny = function () {
-                return this === RuleOperationContext.Any;
-            };
-            RuleOperationContext.prototype.InContext = function (context) {
-                if (this.IsAny()) {
-                    return true;
-                }
-                for (var _i = 0, _a = this.customContextChecks; _i < _a.length; _i++) {
-                    var check = _a[_i];
-                    if (!check(context)) {
-                        return false;
-                    }
-                }
-                return true;
-            };
-            RuleOperationContext.Any = new RuleOperationContext();
-            return RuleOperationContext;
-        }());
-        formatting.RuleOperationContext = RuleOperationContext;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Rules = (function () {
-            function Rules() {
-                ///
-                /// Common Rules
-                ///
-                // Leave comments alone
-                this.IgnoreBeforeComment = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.Comments), formatting.RuleOperation.create1(1 /* Ignore */));
-                this.IgnoreAfterLineComment = new formatting.Rule(formatting.RuleDescriptor.create3(2 /* SingleLineCommentTrivia */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create1(1 /* Ignore */));
-                // Space after keyword but not before ; or : or ?
-                this.NoSpaceBeforeSemicolon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 23 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeColon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 54 /* ColonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                this.NoSpaceBeforeQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 53 /* QuestionToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                this.SpaceAfterColon = new formatting.Rule(formatting.RuleDescriptor.create3(54 /* ColonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterQuestionMarkInConditionalOperator = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConditionalOperatorContext), 2 /* Space */));
-                this.NoSpaceAfterQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterSemicolon = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Space after }.
-                this.SpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16 /* CloseBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), 2 /* Space */));
-                // Special case for (}, else) and (}, while) since else & while tokens are not part of the tree which makes SpaceAfterCloseBrace rule not applied
-                this.SpaceBetweenCloseBraceAndElse = new formatting.Rule(formatting.RuleDescriptor.create1(16 /* CloseBraceToken */, 80 /* ElseKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBetweenCloseBraceAndWhile = new formatting.Rule(formatting.RuleDescriptor.create1(16 /* CloseBraceToken */, 104 /* WhileKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16 /* CloseBraceToken */, formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 20 /* CloseBracketToken */, 24 /* CommaToken */, 23 /* SemicolonToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // No space for dot
-                this.NoSpaceBeforeDot = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 21 /* DotToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterDot = new formatting.Rule(formatting.RuleDescriptor.create3(21 /* DotToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // No space before and after indexer
-                this.NoSpaceBeforeOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19 /* OpenBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create3(20 /* CloseBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), 8 /* Delete */));
-                // Place a space before open brace in a function declaration
-                this.FunctionOpenBraceLeftTokenRange = formatting.Shared.TokenRange.AnyIncludingMultilineComments;
-                this.SpaceBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
-                // Place a space before open brace in a TypeScript declaration that has braces as children (class, module, enum, etc)
-                this.TypeScriptOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([69 /* Identifier */, 3 /* MultiLineCommentTrivia */, 73 /* ClassKeyword */]);
-                this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
-                // Place a space before open brace in a control flow construct
-                this.ControlOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 3 /* MultiLineCommentTrivia */, 79 /* DoKeyword */, 100 /* TryKeyword */, 85 /* FinallyKeyword */, 80 /* ElseKeyword */]);
-                this.SpaceBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
-                // Insert a space after { and before } in single-line contexts, but remove space from empty object literals {}.
-                this.SpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2 /* Space */));
-                this.SpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2 /* Space */));
-                this.NoSpaceBetweenEmptyBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15 /* OpenBraceToken */, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), 8 /* Delete */));
-                // Insert new line after { and before } in multi-line contexts.
-                this.NewLineAfterOpenBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
-                // For functions and control block place } on a new line    [multi-line rule]
-                this.NewLineBeforeCloseBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyIncludingMultilineComments, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
-                // Special handling of unary operators.
-                // Prefix operators generally shouldn't have a space between
-                // them and their target unary expression.
-                this.NoSpaceAfterUnaryPrefixOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.UnaryPrefixOperators, formatting.Shared.TokenRange.UnaryPrefixExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                this.NoSpaceAfterUnaryPreincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(41 /* PlusPlusToken */, formatting.Shared.TokenRange.UnaryPreincrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterUnaryPredecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(42 /* MinusMinusToken */, formatting.Shared.TokenRange.UnaryPredecrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeUnaryPostincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostincrementExpressions, 41 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeUnaryPostdecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostdecrementExpressions, 42 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // More unary operator special-casing.
-                // DevDiv 181814:  Be careful when removing leading whitespace
-                // around unary operators.  Examples:
-                //      1 - -2  --X-->  1--2
-                //      a + ++b --X-->  a+++b
-                this.SpaceAfterPostincrementWhenFollowedByAdd = new formatting.Rule(formatting.RuleDescriptor.create1(41 /* PlusPlusToken */, 35 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterAddWhenFollowedByUnaryPlus = new formatting.Rule(formatting.RuleDescriptor.create1(35 /* PlusToken */, 35 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterAddWhenFollowedByPreincrement = new formatting.Rule(formatting.RuleDescriptor.create1(35 /* PlusToken */, 41 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterPostdecrementWhenFollowedBySubtract = new formatting.Rule(formatting.RuleDescriptor.create1(42 /* MinusMinusToken */, 36 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterSubtractWhenFollowedByUnaryMinus = new formatting.Rule(formatting.RuleDescriptor.create1(36 /* MinusToken */, 36 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterSubtractWhenFollowedByPredecrement = new formatting.Rule(formatting.RuleDescriptor.create1(36 /* MinusToken */, 42 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.NoSpaceBeforeComma = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 24 /* CommaToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterCertainKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([102 /* VarKeyword */, 98 /* ThrowKeyword */, 92 /* NewKeyword */, 78 /* DeleteKeyword */, 94 /* ReturnKeyword */, 101 /* TypeOfKeyword */, 119 /* AwaitKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceAfterLetConstInVariableDeclaration = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([108 /* LetKeyword */, 74 /* ConstKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), 2 /* Space */));
-                this.NoSpaceBeforeOpenParenInFuncCall = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), 8 /* Delete */));
-                this.SpaceAfterFunctionInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create3(87 /* FunctionKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
-                this.NoSpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 8 /* Delete */));
-                this.SpaceAfterVoidOperator = new formatting.Rule(formatting.RuleDescriptor.create3(103 /* VoidKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), 2 /* Space */));
-                this.NoSpaceBetweenReturnAndSemicolon = new formatting.Rule(formatting.RuleDescriptor.create1(94 /* ReturnKeyword */, 23 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Add a space between statements. All keywords except (do,else,case) has open/close parens after them.
-                // So, we have a rule to add a space for [),Any], [do,Any], [else,Any], and [case,Any]
-                this.SpaceBetweenStatements = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 79 /* DoKeyword */, 80 /* ElseKeyword */, 71 /* CaseKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotForContext), 2 /* Space */));
-                // This low-pri rule takes care of "try {" and "finally {" in case the rule SpaceBeforeOpenBraceInControl didn't execute on FormatOnEnter.
-                this.SpaceAfterTryFinally = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([100 /* TryKeyword */, 85 /* FinallyKeyword */]), 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                //      get x() {}
-                //      set x(val) {}
-                this.SpaceAfterGetSetInMember = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([123 /* GetKeyword */, 131 /* SetKeyword */]), 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
-                // Special case for binary operators (that are keywords). For these we have to add a space and shouldn't follow any user options.
-                this.SpaceBeforeBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryKeywordOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryKeywordOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                // TypeScript-specific higher priority rules
-                // Treat constructor as an identifier in a function declaration, and remove spaces between constructor and following left parentheses
-                this.NoSpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(121 /* ConstructorKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Use of module as a function call. e.g.: import m2 = module("m2");
-                this.NoSpaceAfterModuleImport = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([125 /* ModuleKeyword */, 129 /* RequireKeyword */]), 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Add a space around certain TypeScript keywords
-                this.SpaceAfterCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([115 /* AbstractKeyword */, 73 /* ClassKeyword */, 122 /* DeclareKeyword */, 77 /* DefaultKeyword */, 81 /* EnumKeyword */, 82 /* ExportKeyword */, 83 /* ExtendsKeyword */, 123 /* GetKeyword */, 106 /* ImplementsKeyword */, 89 /* ImportKeyword */, 107 /* InterfaceKeyword */, 125 /* ModuleKeyword */, 126 /* NamespaceKeyword */, 110 /* PrivateKeyword */, 112 /* PublicKeyword */, 111 /* ProtectedKeyword */, 131 /* SetKeyword */, 113 /* StaticKeyword */, 134 /* TypeKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([83 /* ExtendsKeyword */, 106 /* ImplementsKeyword */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Treat string literals in module names as identifiers, and add a space between the literal and the opening Brace braces, e.g.: module "m2" {
-                this.SpaceAfterModuleName = new formatting.Rule(formatting.RuleDescriptor.create1(9 /* StringLiteral */, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsModuleDeclContext), 2 /* Space */));
-                // Lambda expressions
-                this.SpaceBeforeArrow = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 34 /* EqualsGreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceAfterArrow = new formatting.Rule(formatting.RuleDescriptor.create3(34 /* EqualsGreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Optional parameters and let args
-                this.NoSpaceAfterEllipsis = new formatting.Rule(formatting.RuleDescriptor.create1(22 /* DotDotDotToken */, 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterOptionalParameters = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 24 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
-                // generics and type assertions
-                this.NoSpaceBeforeOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.TypeNames, 25 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceBetweenCloseParenAndAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create1(18 /* CloseParenToken */, 25 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceAfterOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(25 /* LessThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 27 /* GreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceAfterCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.FromTokens([17 /* OpenParenToken */, 19 /* OpenBracketToken */, 27 /* GreaterThanToken */, 24 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
-                this.NoSpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 8 /* Delete */));
-                // Remove spaces in empty interface literals. e.g.: x: {}
-                this.NoSpaceBetweenEmptyInterfaceBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15 /* OpenBraceToken */, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectTypeContext), 8 /* Delete */));
-                // decorators
-                this.SpaceBeforeAt = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 55 /* AtToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceAfterAt = new formatting.Rule(formatting.RuleDescriptor.create3(55 /* AtToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterDecorator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([115 /* AbstractKeyword */, 69 /* Identifier */, 82 /* ExportKeyword */, 77 /* DefaultKeyword */, 73 /* ClassKeyword */, 113 /* StaticKeyword */, 112 /* PublicKeyword */, 110 /* PrivateKeyword */, 111 /* ProtectedKeyword */, 123 /* GetKeyword */, 131 /* SetKeyword */, 19 /* OpenBracketToken */, 37 /* AsteriskToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsEndOfDecoratorContextOnSameLine), 2 /* Space */));
-                this.NoSpaceBetweenFunctionKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 37 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 8 /* Delete */));
-                this.SpaceAfterStarInGeneratorDeclaration = new formatting.Rule(formatting.RuleDescriptor.create3(37 /* AsteriskToken */, formatting.Shared.TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 2 /* Space */));
-                this.NoSpaceBetweenYieldKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(114 /* YieldKeyword */, 37 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 8 /* Delete */));
-                this.SpaceBetweenYieldOrYieldStarAndOperand = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([114 /* YieldKeyword */, 37 /* AsteriskToken */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 2 /* Space */));
-                // Async-await
-                this.SpaceBetweenAsyncAndOpenParen = new formatting.Rule(formatting.RuleDescriptor.create1(118 /* AsyncKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsArrowFunctionContext, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBetweenAsyncAndFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(118 /* AsyncKeyword */, 87 /* FunctionKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // template string
-                this.NoSpaceBetweenTagAndTemplateString = new formatting.Rule(formatting.RuleDescriptor.create3(69 /* Identifier */, formatting.Shared.TokenRange.FromTokens([11 /* NoSubstitutionTemplateLiteral */, 12 /* TemplateHead */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // These rules are higher in priority than user-configurable rules.
-                this.HighPriorityCommonRules = [
-                    this.IgnoreBeforeComment, this.IgnoreAfterLineComment,
-                    this.NoSpaceBeforeColon, this.SpaceAfterColon, this.NoSpaceBeforeQuestionMark, this.SpaceAfterQuestionMarkInConditionalOperator,
-                    this.NoSpaceAfterQuestionMark,
-                    this.NoSpaceBeforeDot, this.NoSpaceAfterDot,
-                    this.NoSpaceAfterUnaryPrefixOperator,
-                    this.NoSpaceAfterUnaryPreincrementOperator, this.NoSpaceAfterUnaryPredecrementOperator,
-                    this.NoSpaceBeforeUnaryPostincrementOperator, this.NoSpaceBeforeUnaryPostdecrementOperator,
-                    this.SpaceAfterPostincrementWhenFollowedByAdd,
-                    this.SpaceAfterAddWhenFollowedByUnaryPlus, this.SpaceAfterAddWhenFollowedByPreincrement,
-                    this.SpaceAfterPostdecrementWhenFollowedBySubtract,
-                    this.SpaceAfterSubtractWhenFollowedByUnaryMinus, this.SpaceAfterSubtractWhenFollowedByPredecrement,
-                    this.NoSpaceAfterCloseBrace,
-                    this.SpaceAfterOpenBrace, this.SpaceBeforeCloseBrace, this.NewLineBeforeCloseBraceInBlockContext,
-                    this.SpaceAfterCloseBrace, this.SpaceBetweenCloseBraceAndElse, this.SpaceBetweenCloseBraceAndWhile, this.NoSpaceBetweenEmptyBraceBrackets,
-                    this.NoSpaceBetweenFunctionKeywordAndStar, this.SpaceAfterStarInGeneratorDeclaration,
-                    this.SpaceAfterFunctionInFuncDecl, this.NewLineAfterOpenBraceInBlockContext, this.SpaceAfterGetSetInMember,
-                    this.NoSpaceBetweenYieldKeywordAndStar, this.SpaceBetweenYieldOrYieldStarAndOperand,
-                    this.NoSpaceBetweenReturnAndSemicolon,
-                    this.SpaceAfterCertainKeywords,
-                    this.SpaceAfterLetConstInVariableDeclaration,
-                    this.NoSpaceBeforeOpenParenInFuncCall,
-                    this.SpaceBeforeBinaryKeywordOperator, this.SpaceAfterBinaryKeywordOperator,
-                    this.SpaceAfterVoidOperator,
-                    this.SpaceBetweenAsyncAndOpenParen, this.SpaceBetweenAsyncAndFunctionKeyword,
-                    this.NoSpaceBetweenTagAndTemplateString,
-                    // TypeScript-specific rules
-                    this.NoSpaceAfterConstructor, this.NoSpaceAfterModuleImport,
-                    this.SpaceAfterCertainTypeScriptKeywords, this.SpaceBeforeCertainTypeScriptKeywords,
-                    this.SpaceAfterModuleName,
-                    this.SpaceBeforeArrow, this.SpaceAfterArrow,
-                    this.NoSpaceAfterEllipsis,
-                    this.NoSpaceAfterOptionalParameters,
-                    this.NoSpaceBetweenEmptyInterfaceBraceBrackets,
-                    this.NoSpaceBeforeOpenAngularBracket,
-                    this.NoSpaceBetweenCloseParenAndAngularBracket,
-                    this.NoSpaceAfterOpenAngularBracket,
-                    this.NoSpaceBeforeCloseAngularBracket,
-                    this.NoSpaceAfterCloseAngularBracket,
-                    this.NoSpaceAfterTypeAssertion,
-                    this.SpaceBeforeAt,
-                    this.NoSpaceAfterAt,
-                    this.SpaceAfterDecorator,
-                ];
-                // These rules are lower in priority than user-configurable rules.
-                this.LowPriorityCommonRules = [
-                    this.NoSpaceBeforeSemicolon,
-                    this.SpaceBeforeOpenBraceInControl, this.SpaceBeforeOpenBraceInFunction, this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock,
-                    this.NoSpaceBeforeComma,
-                    this.NoSpaceBeforeOpenBracket,
-                    this.NoSpaceAfterCloseBracket,
-                    this.SpaceAfterSemicolon,
-                    this.NoSpaceBeforeOpenParenInFuncDecl,
-                    this.SpaceBetweenStatements, this.SpaceAfterTryFinally
-                ];
-                ///
-                /// Rules controlled by user options
-                ///
-                // Insert space after comma delimiter
-                this.SpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNextTokenNotCloseBracket), 2 /* Space */));
-                this.NoSpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Insert space before and after binary operators
-                this.SpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.SpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
-                this.NoSpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
-                this.NoSpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
-                // Insert space after keywords in control flow statements
-                this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 2 /* Space */));
-                this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 8 /* Delete */));
-                // Open Brace braces after function
-                // TypeScript: Function can have return types, which can be made of tons of different token kinds
-                this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
-                // Open Brace braces after TypeScript module/class/interface
-                this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
-                // Open Brace braces after control block
-                this.NewLineBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
-                // Insert space after semicolon in for statement
-                this.SpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 2 /* Space */));
-                this.NoSpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 8 /* Delete */));
-                // Insert space after opening and before closing nonempty parenthesis
-                this.SpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBetweenParens = new formatting.Rule(formatting.RuleDescriptor.create1(17 /* OpenParenToken */, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Insert space after opening and before closing nonempty brackets
-                this.SpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.SpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBetweenBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(19 /* OpenBracketToken */, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.NoSpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                // Insert space after opening and before closing template string braces
-                this.NoSpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12 /* TemplateHead */, 13 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12 /* TemplateHead */, 13 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                this.NoSpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13 /* TemplateMiddle */, 14 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
-                this.SpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13 /* TemplateMiddle */, 14 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
-                // Insert space after function keyword for anonymous functions
-                this.SpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
-                this.NoSpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 8 /* Delete */));
-            }
-            Rules.prototype.getRuleName = function (rule) {
-                var o = this;
-                for (var name_38 in o) {
-                    if (o[name_38] === rule) {
-                        return name_38;
-                    }
-                }
-                throw new Error("Unknown rule");
-            };
-            ///
-            /// Contexts
-            ///
-            Rules.IsForContext = function (context) {
-                return context.contextNode.kind === 206 /* ForStatement */;
-            };
-            Rules.IsNotForContext = function (context) {
-                return !Rules.IsForContext(context);
-            };
-            Rules.IsBinaryOpContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 187 /* BinaryExpression */:
-                    case 188 /* ConditionalExpression */:
-                    case 195 /* AsExpression */:
-                    case 154 /* TypePredicate */:
-                    case 162 /* UnionType */:
-                    case 163 /* IntersectionType */:
-                        return true;
-                    // equals in binding elements: function foo([[x, y] = [1, 2]])
-                    case 169 /* BindingElement */:
-                    // equals in type X = ...
-                    case 223 /* TypeAliasDeclaration */:
-                    // equal in import a = module('a');
-                    case 229 /* ImportEqualsDeclaration */:
-                    // equal in let a = 0;
-                    case 218 /* VariableDeclaration */:
-                    // equal in p = 0;
-                    case 142 /* Parameter */:
-                    case 255 /* EnumMember */:
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                        return context.currentTokenSpan.kind === 56 /* EqualsToken */ || context.nextTokenSpan.kind === 56 /* EqualsToken */;
-                    // "in" keyword in for (let x in []) { }
-                    case 207 /* ForInStatement */:
-                        return context.currentTokenSpan.kind === 90 /* InKeyword */ || context.nextTokenSpan.kind === 90 /* InKeyword */;
-                    // Technically, "of" is not a binary operator, but format it the same way as "in"
-                    case 208 /* ForOfStatement */:
-                        return context.currentTokenSpan.kind === 138 /* OfKeyword */ || context.nextTokenSpan.kind === 138 /* OfKeyword */;
-                }
-                return false;
-            };
-            Rules.IsNotBinaryOpContext = function (context) {
-                return !Rules.IsBinaryOpContext(context);
-            };
-            Rules.IsConditionalOperatorContext = function (context) {
-                return context.contextNode.kind === 188 /* ConditionalExpression */;
-            };
-            Rules.IsSameLineTokenOrBeforeMultilineBlockContext = function (context) {
-                //// This check is mainly used inside SpaceBeforeOpenBraceInControl and SpaceBeforeOpenBraceInFunction.
-                ////
-                //// Ex: 
-                //// if (1)     { ....
-                ////      * ) and { are on the same line so apply the rule. Here we don't care whether it's same or multi block context
-                ////
-                //// Ex: 
-                //// if (1)
-                //// { ... }
-                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we don't format.
-                ////
-                //// Ex:
-                //// if (1) 
-                //// { ...
-                //// }
-                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we format.
-                return context.TokensAreOnSameLine() || Rules.IsBeforeMultilineBlockContext(context);
-            };
-            // This check is done before an open brace in a control construct, a function, or a typescript block declaration
-            Rules.IsBeforeMultilineBlockContext = function (context) {
-                return Rules.IsBeforeBlockContext(context) && !(context.NextNodeAllOnSameLine() || context.NextNodeBlockIsOnOneLine());
-            };
-            Rules.IsMultilineBlockContext = function (context) {
-                return Rules.IsBlockContext(context) && !(context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
-            };
-            Rules.IsSingleLineBlockContext = function (context) {
-                return Rules.IsBlockContext(context) && (context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
-            };
-            Rules.IsBlockContext = function (context) {
-                return Rules.NodeIsBlockContext(context.contextNode);
-            };
-            Rules.IsBeforeBlockContext = function (context) {
-                return Rules.NodeIsBlockContext(context.nextTokenParent);
-            };
-            // IMPORTANT!!! This method must return true ONLY for nodes with open and close braces as immediate children
-            Rules.NodeIsBlockContext = function (node) {
-                if (Rules.NodeIsTypeScriptDeclWithBlockContext(node)) {
-                    // This means we are in a context that looks like a block to the user, but in the grammar is actually not a node (it's a class, module, enum, object type literal, etc).
-                    return true;
-                }
-                switch (node.kind) {
-                    case 199 /* Block */:
-                    case 227 /* CaseBlock */:
-                    case 171 /* ObjectLiteralExpression */:
-                    case 226 /* ModuleBlock */:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsFunctionDeclContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    // case SyntaxKind.MemberFunctionDeclaration:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    // case SyntaxKind.MethodSignature:
-                    case 151 /* CallSignature */:
-                    case 179 /* FunctionExpression */:
-                    case 148 /* Constructor */:
-                    case 180 /* ArrowFunction */:
-                    // case SyntaxKind.ConstructorDeclaration:
-                    // case SyntaxKind.SimpleArrowFunctionExpression:
-                    // case SyntaxKind.ParenthesizedArrowFunctionExpression:
-                    case 222 /* InterfaceDeclaration */:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsFunctionDeclarationOrFunctionExpressionContext = function (context) {
-                return context.contextNode.kind === 220 /* FunctionDeclaration */ || context.contextNode.kind === 179 /* FunctionExpression */;
-            };
-            Rules.IsTypeScriptDeclWithBlockContext = function (context) {
-                return Rules.NodeIsTypeScriptDeclWithBlockContext(context.contextNode);
-            };
-            Rules.NodeIsTypeScriptDeclWithBlockContext = function (node) {
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 159 /* TypeLiteral */:
-                    case 225 /* ModuleDeclaration */:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsAfterCodeBlockContext = function (context) {
-                switch (context.currentTokenParent.kind) {
-                    case 221 /* ClassDeclaration */:
-                    case 225 /* ModuleDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 199 /* Block */:
-                    case 252 /* CatchClause */:
-                    case 226 /* ModuleBlock */:
-                    case 213 /* SwitchStatement */:
-                        return true;
-                }
-                return false;
-            };
-            Rules.IsControlDeclContext = function (context) {
-                switch (context.contextNode.kind) {
-                    case 203 /* IfStatement */:
-                    case 213 /* SwitchStatement */:
-                    case 206 /* ForStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 205 /* WhileStatement */:
-                    case 216 /* TryStatement */:
-                    case 204 /* DoStatement */:
-                    case 212 /* WithStatement */:
-                    // TODO
-                    // case SyntaxKind.ElseClause:
-                    case 252 /* CatchClause */:
-                        return true;
-                    default:
-                        return false;
-                }
-            };
-            Rules.IsObjectContext = function (context) {
-                return context.contextNode.kind === 171 /* ObjectLiteralExpression */;
-            };
-            Rules.IsFunctionCallContext = function (context) {
-                return context.contextNode.kind === 174 /* CallExpression */;
-            };
-            Rules.IsNewContext = function (context) {
-                return context.contextNode.kind === 175 /* NewExpression */;
-            };
-            Rules.IsFunctionCallOrNewContext = function (context) {
-                return Rules.IsFunctionCallContext(context) || Rules.IsNewContext(context);
-            };
-            Rules.IsPreviousTokenNotComma = function (context) {
-                return context.currentTokenSpan.kind !== 24 /* CommaToken */;
-            };
-            Rules.IsNextTokenNotCloseBracket = function (context) {
-                return context.nextTokenSpan.kind !== 20 /* CloseBracketToken */;
-            };
-            Rules.IsArrowFunctionContext = function (context) {
-                return context.contextNode.kind === 180 /* ArrowFunction */;
-            };
-            Rules.IsNonJsxSameLineTokenContext = function (context) {
-                return context.TokensAreOnSameLine() && context.contextNode.kind !== 244 /* JsxText */;
-            };
-            Rules.IsNotBeforeBlockInFunctionDeclarationContext = function (context) {
-                return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context);
-            };
-            Rules.IsEndOfDecoratorContextOnSameLine = function (context) {
-                return context.TokensAreOnSameLine() &&
-                    context.contextNode.decorators &&
-                    Rules.NodeIsInDecoratorContext(context.currentTokenParent) &&
-                    !Rules.NodeIsInDecoratorContext(context.nextTokenParent);
-            };
-            Rules.NodeIsInDecoratorContext = function (node) {
-                while (ts.isExpression(node)) {
-                    node = node.parent;
-                }
-                return node.kind === 143 /* Decorator */;
-            };
-            Rules.IsStartOfVariableDeclarationList = function (context) {
-                return context.currentTokenParent.kind === 219 /* VariableDeclarationList */ &&
-                    context.currentTokenParent.getStart(context.sourceFile) === context.currentTokenSpan.pos;
-            };
-            Rules.IsNotFormatOnEnter = function (context) {
-                return context.formattingRequestKind !== 2 /* FormatOnEnter */;
-            };
-            Rules.IsModuleDeclContext = function (context) {
-                return context.contextNode.kind === 225 /* ModuleDeclaration */;
-            };
-            Rules.IsObjectTypeContext = function (context) {
-                return context.contextNode.kind === 159 /* TypeLiteral */; // && context.contextNode.parent.kind !== SyntaxKind.InterfaceDeclaration;
-            };
-            Rules.IsTypeArgumentOrParameterOrAssertion = function (token, parent) {
-                if (token.kind !== 25 /* LessThanToken */ && token.kind !== 27 /* GreaterThanToken */) {
-                    return false;
-                }
-                switch (parent.kind) {
-                    case 155 /* TypeReference */:
-                    case 177 /* TypeAssertionExpression */:
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 174 /* CallExpression */:
-                    case 175 /* NewExpression */:
-                    case 194 /* ExpressionWithTypeArguments */:
-                        return true;
-                    default:
-                        return false;
-                }
-            };
-            Rules.IsTypeArgumentOrParameterOrAssertionContext = function (context) {
-                return Rules.IsTypeArgumentOrParameterOrAssertion(context.currentTokenSpan, context.currentTokenParent) ||
-                    Rules.IsTypeArgumentOrParameterOrAssertion(context.nextTokenSpan, context.nextTokenParent);
-            };
-            Rules.IsTypeAssertionContext = function (context) {
-                return context.contextNode.kind === 177 /* TypeAssertionExpression */;
-            };
-            Rules.IsVoidOpContext = function (context) {
-                return context.currentTokenSpan.kind === 103 /* VoidKeyword */ && context.currentTokenParent.kind === 183 /* VoidExpression */;
-            };
-            Rules.IsYieldOrYieldStarWithOperand = function (context) {
-                return context.contextNode.kind === 190 /* YieldExpression */ && context.contextNode.expression !== undefined;
-            };
-            return Rules;
-        }());
-        formatting.Rules = Rules;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* tslint:disable:no-null-keyword */
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RulesMap = (function () {
-            function RulesMap() {
-                this.map = [];
-                this.mapRowLength = 0;
-            }
-            RulesMap.create = function (rules) {
-                var result = new RulesMap();
-                result.Initialize(rules);
-                return result;
-            };
-            RulesMap.prototype.Initialize = function (rules) {
-                this.mapRowLength = 138 /* LastToken */ + 1;
-                this.map = new Array(this.mapRowLength * this.mapRowLength); // new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
-                // This array is used only during construction of the rulesbucket in the map
-                var rulesBucketConstructionStateList = new Array(this.map.length); // new Array<RulesBucketConstructionState>(this.map.length);
-                this.FillRules(rules, rulesBucketConstructionStateList);
-                return this.map;
-            };
-            RulesMap.prototype.FillRules = function (rules, rulesBucketConstructionStateList) {
-                var _this = this;
-                rules.forEach(function (rule) {
-                    _this.FillRule(rule, rulesBucketConstructionStateList);
-                });
-            };
-            RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
-                var rulesBucketIndex = (row * this.mapRowLength) + column;
-                // Debug.Assert(rulesBucketIndex < this.map.Length, "Trying to access an index outside the array.");
-                return rulesBucketIndex;
-            };
-            RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
-                var _this = this;
-                var specificRule = rule.Descriptor.LeftTokenRange !== formatting.Shared.TokenRange.Any &&
-                    rule.Descriptor.RightTokenRange !== formatting.Shared.TokenRange.Any;
-                rule.Descriptor.LeftTokenRange.GetTokens().forEach(function (left) {
-                    rule.Descriptor.RightTokenRange.GetTokens().forEach(function (right) {
-                        var rulesBucketIndex = _this.GetRuleBucketIndex(left, right);
-                        var rulesBucket = _this.map[rulesBucketIndex];
-                        if (rulesBucket === undefined) {
-                            rulesBucket = _this.map[rulesBucketIndex] = new RulesBucket();
-                        }
-                        rulesBucket.AddRule(rule, specificRule, rulesBucketConstructionStateList, rulesBucketIndex);
-                    });
-                });
-            };
-            RulesMap.prototype.GetRule = function (context) {
-                var bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
-                var bucket = this.map[bucketIndex];
-                if (bucket != null) {
-                    for (var _i = 0, _a = bucket.Rules(); _i < _a.length; _i++) {
-                        var rule = _a[_i];
-                        if (rule.Operation.Context.InContext(context)) {
-                            return rule;
-                        }
-                    }
-                }
-                return null;
-            };
-            return RulesMap;
-        }());
-        formatting.RulesMap = RulesMap;
-        var MaskBitSize = 5;
-        var Mask = 0x1f;
-        (function (RulesPosition) {
-            RulesPosition[RulesPosition["IgnoreRulesSpecific"] = 0] = "IgnoreRulesSpecific";
-            RulesPosition[RulesPosition["IgnoreRulesAny"] = MaskBitSize * 1] = "IgnoreRulesAny";
-            RulesPosition[RulesPosition["ContextRulesSpecific"] = MaskBitSize * 2] = "ContextRulesSpecific";
-            RulesPosition[RulesPosition["ContextRulesAny"] = MaskBitSize * 3] = "ContextRulesAny";
-            RulesPosition[RulesPosition["NoContextRulesSpecific"] = MaskBitSize * 4] = "NoContextRulesSpecific";
-            RulesPosition[RulesPosition["NoContextRulesAny"] = MaskBitSize * 5] = "NoContextRulesAny";
-        })(formatting.RulesPosition || (formatting.RulesPosition = {}));
-        var RulesPosition = formatting.RulesPosition;
-        var RulesBucketConstructionState = (function () {
-            function RulesBucketConstructionState() {
-                //// The Rules list contains all the inserted rules into a rulebucket in the following order:
-                ////    1- Ignore rules with specific token combination
-                ////    2- Ignore rules with any token combination
-                ////    3- Context rules with specific token combination
-                ////    4- Context rules with any token combination
-                ////    5- Non-context rules with specific token combination
-                ////    6- Non-context rules with any token combination
-                //// 
-                //// The member rulesInsertionIndexBitmap is used to describe the number of rules
-                //// in each sub-bucket (above) hence can be used to know the index of where to insert 
-                //// the next rule. It's a bitmap which contains 6 different sections each is given 5 bits.
-                ////
-                //// Example:
-                //// In order to insert a rule to the end of sub-bucket (3), we get the index by adding
-                //// the values in the bitmap segments 3rd, 2nd, and 1st.
-                this.rulesInsertionIndexBitmap = 0;
-            }
-            RulesBucketConstructionState.prototype.GetInsertionIndex = function (maskPosition) {
-                var index = 0;
-                var pos = 0;
-                var indexBitmap = this.rulesInsertionIndexBitmap;
-                while (pos <= maskPosition) {
-                    index += (indexBitmap & Mask);
-                    indexBitmap >>= MaskBitSize;
-                    pos += MaskBitSize;
-                }
-                return index;
-            };
-            RulesBucketConstructionState.prototype.IncreaseInsertionIndex = function (maskPosition) {
-                var value = (this.rulesInsertionIndexBitmap >> maskPosition) & Mask;
-                value++;
-                ts.Debug.assert((value & Mask) === value, "Adding more rules into the sub-bucket than allowed. Maximum allowed is 32 rules.");
-                var temp = this.rulesInsertionIndexBitmap & ~(Mask << maskPosition);
-                temp |= value << maskPosition;
-                this.rulesInsertionIndexBitmap = temp;
-            };
-            return RulesBucketConstructionState;
-        }());
-        formatting.RulesBucketConstructionState = RulesBucketConstructionState;
-        var RulesBucket = (function () {
-            function RulesBucket() {
-                this.rules = [];
-            }
-            RulesBucket.prototype.Rules = function () {
-                return this.rules;
-            };
-            RulesBucket.prototype.AddRule = function (rule, specificTokens, constructionState, rulesBucketIndex) {
-                var position;
-                if (rule.Operation.Action === 1 /* Ignore */) {
-                    position = specificTokens ?
-                        RulesPosition.IgnoreRulesSpecific :
-                        RulesPosition.IgnoreRulesAny;
-                }
-                else if (!rule.Operation.Context.IsAny()) {
-                    position = specificTokens ?
-                        RulesPosition.ContextRulesSpecific :
-                        RulesPosition.ContextRulesAny;
-                }
-                else {
-                    position = specificTokens ?
-                        RulesPosition.NoContextRulesSpecific :
-                        RulesPosition.NoContextRulesAny;
-                }
-                var state = constructionState[rulesBucketIndex];
-                if (state === undefined) {
-                    state = constructionState[rulesBucketIndex] = new RulesBucketConstructionState();
-                }
-                var index = state.GetInsertionIndex(position);
-                this.rules.splice(index, 0, rule);
-                state.IncreaseInsertionIndex(position);
-            };
-            return RulesBucket;
-        }());
-        formatting.RulesBucket = RulesBucket;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Shared;
-        (function (Shared) {
-            var TokenRangeAccess = (function () {
-                function TokenRangeAccess(from, to, except) {
-                    this.tokens = [];
-                    for (var token = from; token <= to; token++) {
-                        if (ts.indexOf(except, token) < 0) {
-                            this.tokens.push(token);
-                        }
-                    }
-                }
-                TokenRangeAccess.prototype.GetTokens = function () {
-                    return this.tokens;
-                };
-                TokenRangeAccess.prototype.Contains = function (token) {
-                    return this.tokens.indexOf(token) >= 0;
-                };
-                return TokenRangeAccess;
-            }());
-            Shared.TokenRangeAccess = TokenRangeAccess;
-            var TokenValuesAccess = (function () {
-                function TokenValuesAccess(tks) {
-                    this.tokens = tks && tks.length ? tks : [];
-                }
-                TokenValuesAccess.prototype.GetTokens = function () {
-                    return this.tokens;
-                };
-                TokenValuesAccess.prototype.Contains = function (token) {
-                    return this.tokens.indexOf(token) >= 0;
-                };
-                return TokenValuesAccess;
-            }());
-            Shared.TokenValuesAccess = TokenValuesAccess;
-            var TokenSingleValueAccess = (function () {
-                function TokenSingleValueAccess(token) {
-                    this.token = token;
-                }
-                TokenSingleValueAccess.prototype.GetTokens = function () {
-                    return [this.token];
-                };
-                TokenSingleValueAccess.prototype.Contains = function (tokenValue) {
-                    return tokenValue === this.token;
-                };
-                return TokenSingleValueAccess;
-            }());
-            Shared.TokenSingleValueAccess = TokenSingleValueAccess;
-            var TokenAllAccess = (function () {
-                function TokenAllAccess() {
-                }
-                TokenAllAccess.prototype.GetTokens = function () {
-                    var result = [];
-                    for (var token = 0 /* FirstToken */; token <= 138 /* LastToken */; token++) {
-                        result.push(token);
-                    }
-                    return result;
-                };
-                TokenAllAccess.prototype.Contains = function (tokenValue) {
-                    return true;
-                };
-                TokenAllAccess.prototype.toString = function () {
-                    return "[allTokens]";
-                };
-                return TokenAllAccess;
-            }());
-            Shared.TokenAllAccess = TokenAllAccess;
-            var TokenRange = (function () {
-                function TokenRange(tokenAccess) {
-                    this.tokenAccess = tokenAccess;
-                }
-                TokenRange.FromToken = function (token) {
-                    return new TokenRange(new TokenSingleValueAccess(token));
-                };
-                TokenRange.FromTokens = function (tokens) {
-                    return new TokenRange(new TokenValuesAccess(tokens));
-                };
-                TokenRange.FromRange = function (f, to, except) {
-                    if (except === void 0) { except = []; }
-                    return new TokenRange(new TokenRangeAccess(f, to, except));
-                };
-                TokenRange.AllTokens = function () {
-                    return new TokenRange(new TokenAllAccess());
-                };
-                TokenRange.prototype.GetTokens = function () {
-                    return this.tokenAccess.GetTokens();
-                };
-                TokenRange.prototype.Contains = function (token) {
-                    return this.tokenAccess.Contains(token);
-                };
-                TokenRange.prototype.toString = function () {
-                    return this.tokenAccess.toString();
-                };
-                TokenRange.Any = TokenRange.AllTokens();
-                TokenRange.AnyIncludingMultilineComments = TokenRange.FromTokens(TokenRange.Any.GetTokens().concat([3 /* MultiLineCommentTrivia */]));
-                TokenRange.Keywords = TokenRange.FromRange(70 /* FirstKeyword */, 138 /* LastKeyword */);
-                TokenRange.BinaryOperators = TokenRange.FromRange(25 /* FirstBinaryOperator */, 68 /* LastBinaryOperator */);
-                TokenRange.BinaryKeywordOperators = TokenRange.FromTokens([90 /* InKeyword */, 91 /* InstanceOfKeyword */, 138 /* OfKeyword */, 116 /* AsKeyword */, 124 /* IsKeyword */]);
-                TokenRange.UnaryPrefixOperators = TokenRange.FromTokens([41 /* PlusPlusToken */, 42 /* MinusMinusToken */, 50 /* TildeToken */, 49 /* ExclamationToken */]);
-                TokenRange.UnaryPrefixExpressions = TokenRange.FromTokens([8 /* NumericLiteral */, 69 /* Identifier */, 17 /* OpenParenToken */, 19 /* OpenBracketToken */, 15 /* OpenBraceToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
-                TokenRange.UnaryPreincrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
-                TokenRange.UnaryPostincrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 18 /* CloseParenToken */, 20 /* CloseBracketToken */, 92 /* NewKeyword */]);
-                TokenRange.UnaryPredecrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
-                TokenRange.UnaryPostdecrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 18 /* CloseParenToken */, 20 /* CloseBracketToken */, 92 /* NewKeyword */]);
-                TokenRange.Comments = TokenRange.FromTokens([2 /* SingleLineCommentTrivia */, 3 /* MultiLineCommentTrivia */]);
-                TokenRange.TypeNames = TokenRange.FromTokens([69 /* Identifier */, 130 /* NumberKeyword */, 132 /* StringKeyword */, 120 /* BooleanKeyword */, 133 /* SymbolKeyword */, 103 /* VoidKeyword */, 117 /* AnyKeyword */]);
-                return TokenRange;
-            }());
-            Shared.TokenRange = TokenRange;
-        })(Shared = formatting.Shared || (formatting.Shared = {}));
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='..\services.ts' />
-///<reference path='formattingContext.ts' />
-///<reference path='formattingRequestKind.ts' />
-///<reference path='rule.ts' />
-///<reference path='ruleAction.ts' />
-///<reference path='ruleDescriptor.ts' />
-///<reference path='ruleFlag.ts' />
-///<reference path='ruleOperation.ts' />
-///<reference path='ruleOperationContext.ts' />
-///<reference path='rules.ts' />
-///<reference path='rulesMap.ts' />
-///<reference path='tokenRange.ts' /> 
-/// <reference path="references.ts"/>
-/* tslint:disable:no-null-keyword */
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var RulesProvider = (function () {
-            function RulesProvider() {
-                this.globalRules = new formatting.Rules();
-            }
-            RulesProvider.prototype.getRuleName = function (rule) {
-                return this.globalRules.getRuleName(rule);
-            };
-            RulesProvider.prototype.getRuleByName = function (name) {
-                return this.globalRules[name];
-            };
-            RulesProvider.prototype.getRulesMap = function () {
-                return this.rulesMap;
-            };
-            RulesProvider.prototype.ensureUpToDate = function (options) {
-                // TODO: Should this be '==='?
-                if (this.options == null || !ts.compareDataObjects(this.options, options)) {
-                    var activeRules = this.createActiveRules(options);
-                    var rulesMap = formatting.RulesMap.create(activeRules);
-                    this.activeRules = activeRules;
-                    this.rulesMap = rulesMap;
-                    this.options = ts.clone(options);
-                }
-            };
-            RulesProvider.prototype.createActiveRules = function (options) {
-                var rules = this.globalRules.HighPriorityCommonRules.slice(0);
-                if (options.InsertSpaceAfterCommaDelimiter) {
-                    rules.push(this.globalRules.SpaceAfterComma);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterComma);
-                }
-                if (options.InsertSpaceAfterFunctionKeywordForAnonymousFunctions) {
-                    rules.push(this.globalRules.SpaceAfterAnonymousFunctionKeyword);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterAnonymousFunctionKeyword);
-                }
-                if (options.InsertSpaceAfterKeywordsInControlFlowStatements) {
-                    rules.push(this.globalRules.SpaceAfterKeywordInControl);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterKeywordInControl);
-                }
-                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis) {
-                    rules.push(this.globalRules.SpaceAfterOpenParen);
-                    rules.push(this.globalRules.SpaceBeforeCloseParen);
-                    rules.push(this.globalRules.NoSpaceBetweenParens);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenParen);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseParen);
-                    rules.push(this.globalRules.NoSpaceBetweenParens);
-                }
-                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets) {
-                    rules.push(this.globalRules.SpaceAfterOpenBracket);
-                    rules.push(this.globalRules.SpaceBeforeCloseBracket);
-                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterOpenBracket);
-                    rules.push(this.globalRules.NoSpaceBeforeCloseBracket);
-                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
-                }
-                if (options.InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces) {
-                    rules.push(this.globalRules.SpaceAfterTemplateHeadAndMiddle);
-                    rules.push(this.globalRules.SpaceBeforeTemplateMiddleAndTail);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterTemplateHeadAndMiddle);
-                    rules.push(this.globalRules.NoSpaceBeforeTemplateMiddleAndTail);
-                }
-                if (options.InsertSpaceAfterSemicolonInForStatements) {
-                    rules.push(this.globalRules.SpaceAfterSemicolonInFor);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceAfterSemicolonInFor);
-                }
-                if (options.InsertSpaceBeforeAndAfterBinaryOperators) {
-                    rules.push(this.globalRules.SpaceBeforeBinaryOperator);
-                    rules.push(this.globalRules.SpaceAfterBinaryOperator);
-                }
-                else {
-                    rules.push(this.globalRules.NoSpaceBeforeBinaryOperator);
-                    rules.push(this.globalRules.NoSpaceAfterBinaryOperator);
-                }
-                if (options.PlaceOpenBraceOnNewLineForControlBlocks) {
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInControl);
-                }
-                if (options.PlaceOpenBraceOnNewLineForFunctions) {
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInFunction);
-                    rules.push(this.globalRules.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock);
-                }
-                rules = rules.concat(this.globalRules.LowPriorityCommonRules);
-                return rules;
-            };
-            return RulesProvider;
-        }());
-        formatting.RulesProvider = RulesProvider;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='..\services.ts' />
-///<reference path='formattingScanner.ts' />
-///<reference path='rulesProvider.ts' />
-///<reference path='references.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var Constants;
-        (function (Constants) {
-            Constants[Constants["Unknown"] = -1] = "Unknown";
-        })(Constants || (Constants = {}));
-        function formatOnEnter(position, sourceFile, rulesProvider, options) {
-            var line = sourceFile.getLineAndCharacterOfPosition(position).line;
-            if (line === 0) {
-                return [];
-            }
-            // After the enter key, the cursor is now at a new line. The new line may or may not contain non-whitespace characters.
-            // If the new line has only whitespaces, we won't want to format this line, because that would remove the indentation as
-            // trailing whitespaces. So the end of the formatting span should be the later one between:
-            //  1. the end of the previous line
-            //  2. the last non-whitespace character in the current line
-            var endOfFormatSpan = ts.getEndLinePosition(line, sourceFile);
-            while (ts.isWhiteSpace(sourceFile.text.charCodeAt(endOfFormatSpan)) && !ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
-                endOfFormatSpan--;
-            }
-            var span = {
-                // get start position for the previous line
-                pos: ts.getStartPositionOfLine(line - 1, sourceFile),
-                // end value is exclusive so add 1 to the result
-                end: endOfFormatSpan + 1
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 2 /* FormatOnEnter */);
-        }
-        formatting.formatOnEnter = formatOnEnter;
-        function formatOnSemicolon(position, sourceFile, rulesProvider, options) {
-            return formatOutermostParent(position, 23 /* SemicolonToken */, sourceFile, options, rulesProvider, 3 /* FormatOnSemicolon */);
-        }
-        formatting.formatOnSemicolon = formatOnSemicolon;
-        function formatOnClosingCurly(position, sourceFile, rulesProvider, options) {
-            return formatOutermostParent(position, 16 /* CloseBraceToken */, sourceFile, options, rulesProvider, 4 /* FormatOnClosingCurlyBrace */);
-        }
-        formatting.formatOnClosingCurly = formatOnClosingCurly;
-        function formatDocument(sourceFile, rulesProvider, options) {
-            var span = {
-                pos: 0,
-                end: sourceFile.text.length
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 0 /* FormatDocument */);
-        }
-        formatting.formatDocument = formatDocument;
-        function formatSelection(start, end, sourceFile, rulesProvider, options) {
-            // format from the beginning of the line
-            var span = {
-                pos: ts.getLineStartPositionForPosition(start, sourceFile),
-                end: end
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, 1 /* FormatSelection */);
-        }
-        formatting.formatSelection = formatSelection;
-        function formatOutermostParent(position, expectedLastToken, sourceFile, options, rulesProvider, requestKind) {
-            var parent = findOutermostParent(position, expectedLastToken, sourceFile);
-            if (!parent) {
-                return [];
-            }
-            var span = {
-                pos: ts.getLineStartPositionForPosition(parent.getStart(sourceFile), sourceFile),
-                end: parent.end
-            };
-            return formatSpan(span, sourceFile, options, rulesProvider, requestKind);
-        }
-        function findOutermostParent(position, expectedTokenKind, sourceFile) {
-            var precedingToken = ts.findPrecedingToken(position, sourceFile);
-            // when it is claimed that trigger character was typed at given position
-            // we verify that there is a token with a matching kind whose end is equal to position (because the character was just typed).
-            // If this condition is not hold - then trigger character was typed in some other context,
-            // i.e.in comment and thus should not trigger autoformatting
-            if (!precedingToken ||
-                precedingToken.kind !== expectedTokenKind ||
-                position !== precedingToken.getEnd()) {
-                return undefined;
-            }
-            // walk up and search for the parent node that ends at the same position with precedingToken.
-            // for cases like this
-            //
-            // let x = 1;
-            // while (true) {
-            // }
-            // after typing close curly in while statement we want to reformat just the while statement.
-            // However if we just walk upwards searching for the parent that has the same end value -
-            // we'll end up with the whole source file. isListElement allows to stop on the list element level
-            var current = precedingToken;
-            while (current &&
-                current.parent &&
-                current.parent.end === precedingToken.end &&
-                !isListElement(current.parent, current)) {
-                current = current.parent;
-            }
-            return current;
-        }
-        // Returns true if node is a element in some list in parent
-        // i.e. parent is class declaration with the list of members and node is one of members.
-        function isListElement(parent, node) {
-            switch (parent.kind) {
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                    return ts.rangeContainsRange(parent.members, node);
-                case 225 /* ModuleDeclaration */:
-                    var body = parent.body;
-                    return body && body.kind === 199 /* Block */ && ts.rangeContainsRange(body.statements, node);
-                case 256 /* SourceFile */:
-                case 199 /* Block */:
-                case 226 /* ModuleBlock */:
-                    return ts.rangeContainsRange(parent.statements, node);
-                case 252 /* CatchClause */:
-                    return ts.rangeContainsRange(parent.block.statements, node);
-            }
-            return false;
-        }
-        /** find node that fully contains given text range */
-        function findEnclosingNode(range, sourceFile) {
-            return find(sourceFile);
-            function find(n) {
-                var candidate = ts.forEachChild(n, function (c) { return ts.startEndContainsRange(c.getStart(sourceFile), c.end, range) && c; });
-                if (candidate) {
-                    var result = find(candidate);
-                    if (result) {
-                        return result;
-                    }
-                }
-                return n;
-            }
-        }
-        /** formatting is not applied to ranges that contain parse errors.
-          * This function will return a predicate that for a given text range will tell
-          * if there are any parse errors that overlap with the range.
-          */
-        function prepareRangeContainsErrorFunction(errors, originalRange) {
-            if (!errors.length) {
-                return rangeHasNoErrors;
-            }
-            // pick only errors that fall in range
-            var sorted = errors
-                .filter(function (d) { return ts.rangeOverlapsWithStartEnd(originalRange, d.start, d.start + d.length); })
-                .sort(function (e1, e2) { return e1.start - e2.start; });
-            if (!sorted.length) {
-                return rangeHasNoErrors;
-            }
-            var index = 0;
-            return function (r) {
-                // in current implementation sequence of arguments [r1, r2...] is monotonically increasing.
-                // 'index' tracks the index of the most recent error that was checked.
-                while (true) {
-                    if (index >= sorted.length) {
-                        // all errors in the range were already checked -> no error in specified range
-                        return false;
-                    }
-                    var error = sorted[index];
-                    if (r.end <= error.start) {
-                        // specified range ends before the error refered by 'index' - no error in range
-                        return false;
-                    }
-                    if (ts.startEndOverlapsWithStartEnd(r.pos, r.end, error.start, error.start + error.length)) {
-                        // specified range overlaps with error range
-                        return true;
-                    }
-                    index++;
-                }
-            };
-            function rangeHasNoErrors(r) {
-                return false;
-            }
-        }
-        /**
-          * Start of the original range might fall inside the comment - scanner will not yield appropriate results
-          * This function will look for token that is located before the start of target range
-          * and return its end as start position for the scanner.
-          */
-        function getScanStartPosition(enclosingNode, originalRange, sourceFile) {
-            var start = enclosingNode.getStart(sourceFile);
-            if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
-                return start;
-            }
-            var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile);
-            if (!precedingToken) {
-                // no preceding token found - start from the beginning of enclosing node
-                return enclosingNode.pos;
-            }
-            // preceding token ends after the start of original range (i.e when originalRange.pos falls in the middle of literal)
-            // start from the beginning of enclosingNode to handle the entire 'originalRange'
-            if (precedingToken.end >= originalRange.pos) {
-                return enclosingNode.pos;
-            }
-            return precedingToken.end;
-        }
-        /*
-         * For cases like
-         * if (a ||
-         *     b ||$
-         *     c) {...}
-         * If we hit Enter at $ we want line '    b ||' to be indented.
-         * Formatting will be applied to the last two lines.
-         * Node that fully encloses these lines is binary expression 'a ||...'.
-         * Initial indentation for this node will be 0.
-         * Binary expressions don't introduce new indentation scopes, however it is possible
-         * that some parent node on the same line does - like if statement in this case.
-         * Note that we are considering parents only from the same line with initial node -
-         * if parent is on the different line - its delta was already contributed
-         * to the initial indentation.
-         */
-        function getOwnOrInheritedDelta(n, options, sourceFile) {
-            var previousLine = -1 /* Unknown */;
-            var child;
-            while (n) {
-                var line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
-                if (previousLine !== -1 /* Unknown */ && line !== previousLine) {
-                    break;
-                }
-                if (formatting.SmartIndenter.shouldIndentChildNode(n, child)) {
-                    return options.IndentSize;
-                }
-                previousLine = line;
-                child = n;
-                n = n.parent;
-            }
-            return 0;
-        }
-        function formatSpan(originalRange, sourceFile, options, rulesProvider, requestKind) {
-            var rangeContainsError = prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange);
-            // formatting context is used by rules provider
-            var formattingContext = new formatting.FormattingContext(sourceFile, requestKind);
-            // find the smallest node that fully wraps the range and compute the initial indentation for the node
-            var enclosingNode = findEnclosingNode(originalRange, sourceFile);
-            var formattingScanner = formatting.getFormattingScanner(sourceFile, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end);
-            var initialIndentation = formatting.SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options);
-            var previousRangeHasError;
-            var previousRange;
-            var previousParent;
-            var previousRangeStartLine;
-            var lastIndentedLine;
-            var indentationOnLastIndentedLine;
-            var edits = [];
-            formattingScanner.advance();
-            if (formattingScanner.isOnToken()) {
-                var startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
-                var undecoratedStartLine = startLine;
-                if (enclosingNode.decorators) {
-                    undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
-                }
-                var delta = getOwnOrInheritedDelta(enclosingNode, options, sourceFile);
-                processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
-            }
-            if (!formattingScanner.isOnToken()) {
-                var leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
-                if (leadingTrivia) {
-                    processTrivia(leadingTrivia, enclosingNode, enclosingNode, undefined);
-                    trimTrailingWhitespacesForRemainingRange();
-                }
-            }
-            formattingScanner.close();
-            return edits;
-            // local functions
-            /** Tries to compute the indentation for a list element.
-              * If list element is not in range then
-              * function will pick its actual indentation
-              * so it can be pushed downstream as inherited indentation.
-              * If list element is in the range - its indentation will be equal
-              * to inherited indentation from its predecessors.
-              */
-            function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) {
-                if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) ||
-                    ts.rangeContainsStartEnd(range, startPos, endPos) /* Not to miss zero-range nodes e.g. JsxText */) {
-                    if (inheritedIndentation !== -1 /* Unknown */) {
-                        return inheritedIndentation;
-                    }
-                }
-                else {
-                    var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
-                    var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile);
-                    var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
-                    if (startLine !== parentStartLine || startPos === column) {
-                        return column;
-                    }
-                }
-                return -1 /* Unknown */;
-            }
-            function computeIndentation(node, startLine, inheritedIndentation, parent, parentDynamicIndentation, effectiveParentStartLine) {
-                var indentation = inheritedIndentation;
-                var delta = formatting.SmartIndenter.shouldIndentChildNode(node) ? options.IndentSize : 0;
-                if (effectiveParentStartLine === startLine) {
-                    // if node is located on the same line with the parent
-                    // - inherit indentation from the parent
-                    // - push children if either parent of node itself has non-zero delta
-                    indentation = startLine === lastIndentedLine
-                        ? indentationOnLastIndentedLine
-                        : parentDynamicIndentation.getIndentation();
-                    delta = Math.min(options.IndentSize, parentDynamicIndentation.getDelta(node) + delta);
-                }
-                else if (indentation === -1 /* Unknown */) {
-                    if (formatting.SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement(parent, node, startLine, sourceFile)) {
-                        indentation = parentDynamicIndentation.getIndentation();
-                    }
-                    else {
-                        indentation = parentDynamicIndentation.getIndentation() + parentDynamicIndentation.getDelta(node);
-                    }
-                }
-                return {
-                    indentation: indentation,
-                    delta: delta
-                };
-            }
-            function getFirstNonDecoratorTokenOfNode(node) {
-                if (node.modifiers && node.modifiers.length) {
-                    return node.modifiers[0].kind;
-                }
-                switch (node.kind) {
-                    case 221 /* ClassDeclaration */: return 73 /* ClassKeyword */;
-                    case 222 /* InterfaceDeclaration */: return 107 /* InterfaceKeyword */;
-                    case 220 /* FunctionDeclaration */: return 87 /* FunctionKeyword */;
-                    case 224 /* EnumDeclaration */: return 224 /* EnumDeclaration */;
-                    case 149 /* GetAccessor */: return 123 /* GetKeyword */;
-                    case 150 /* SetAccessor */: return 131 /* SetKeyword */;
-                    case 147 /* MethodDeclaration */:
-                        if (node.asteriskToken) {
-                            return 37 /* AsteriskToken */;
-                        }
-                    // fall-through
-                    case 145 /* PropertyDeclaration */:
-                    case 142 /* Parameter */:
-                        return node.name.kind;
-                }
-            }
-            function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
-                return {
-                    getIndentationForComment: function (kind, tokenIndentation, container) {
-                        switch (kind) {
-                            // preceding comment to the token that closes the indentation scope inherits the indentation from the scope
-                            // ..  {
-                            //     // comment
-                            // }
-                            case 16 /* CloseBraceToken */:
-                            case 20 /* CloseBracketToken */:
-                            case 18 /* CloseParenToken */:
-                                return indentation + getEffectiveDelta(delta, container);
-                        }
-                        return tokenIndentation !== -1 /* Unknown */ ? tokenIndentation : indentation;
-                    },
-                    getIndentationForToken: function (line, kind, container) {
-                        if (nodeStartLine !== line && node.decorators) {
-                            if (kind === getFirstNonDecoratorTokenOfNode(node)) {
-                                // if this token is the first token following the list of decorators, we do not need to indent
-                                return indentation;
-                            }
-                        }
-                        switch (kind) {
-                            // open and close brace, 'else' and 'while' (in do statement) tokens has indentation of the parent
-                            case 15 /* OpenBraceToken */:
-                            case 16 /* CloseBraceToken */:
-                            case 19 /* OpenBracketToken */:
-                            case 20 /* CloseBracketToken */:
-                            case 17 /* OpenParenToken */:
-                            case 18 /* CloseParenToken */:
-                            case 80 /* ElseKeyword */:
-                            case 104 /* WhileKeyword */:
-                            case 55 /* AtToken */:
-                                return indentation;
-                            default:
-                                // if token line equals to the line of containing node (this is a first token in the node) - use node indentation
-                                return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
-                        }
-                    },
-                    getIndentation: function () { return indentation; },
-                    getDelta: function (child) { return getEffectiveDelta(delta, child); },
-                    recomputeIndentation: function (lineAdded) {
-                        if (node.parent && formatting.SmartIndenter.shouldIndentChildNode(node.parent, node)) {
-                            if (lineAdded) {
-                                indentation += options.IndentSize;
-                            }
-                            else {
-                                indentation -= options.IndentSize;
-                            }
-                            if (formatting.SmartIndenter.shouldIndentChildNode(node)) {
-                                delta = options.IndentSize;
-                            }
-                            else {
-                                delta = 0;
-                            }
-                        }
-                    }
-                };
-                function getEffectiveDelta(delta, child) {
-                    // Delta value should be zero when the node explicitly prevents indentation of the child node
-                    return formatting.SmartIndenter.nodeWillIndentChild(node, child, true) ? delta : 0;
-                }
-            }
-            function processNode(node, contextNode, nodeStartLine, undecoratedNodeStartLine, indentation, delta) {
-                if (!ts.rangeOverlapsWithStartEnd(originalRange, node.getStart(sourceFile), node.getEnd())) {
-                    return;
-                }
-                var nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
-                // a useful observations when tracking context node
-                //        /
-                //      [a]
-                //   /   |   \
-                //  [b] [c] [d]
-                // node 'a' is a context node for nodes 'b', 'c', 'd'
-                // except for the leftmost leaf token in [b] - in this case context node ('e') is located somewhere above 'a'
-                // this rule can be applied recursively to child nodes of 'a'.
-                //
-                // context node is set to parent node value after processing every child node
-                // context node is set to parent of the token after processing every token
-                var childContextNode = contextNode;
-                // if there are any tokens that logically belong to node and interleave child nodes
-                // such tokens will be consumed in processChildNode for for the child that follows them
-                ts.forEachChild(node, function (child) {
-                    processChildNode(child, /*inheritedIndentation*/ -1 /* Unknown */, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListItem*/ false);
-                }, function (nodes) {
-                    processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
-                });
-                // proceed any tokens in the node that are located after child nodes
-                while (formattingScanner.isOnToken()) {
-                    var tokenInfo = formattingScanner.readTokenInfo(node);
-                    if (tokenInfo.token.end > node.end) {
-                        break;
-                    }
-                    consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation);
-                }
-                function processChildNode(child, inheritedIndentation, parent, parentDynamicIndentation, parentStartLine, undecoratedParentStartLine, isListItem, isFirstListItem) {
-                    var childStartPos = child.getStart(sourceFile);
-                    var childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
-                    var undecoratedChildStartLine = childStartLine;
-                    if (child.decorators) {
-                        undecoratedChildStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(child, sourceFile)).line;
-                    }
-                    // if child is a list item - try to get its indentation
-                    var childIndentationAmount = -1 /* Unknown */;
-                    if (isListItem) {
-                        childIndentationAmount = tryComputeIndentationForListItem(childStartPos, child.end, parentStartLine, originalRange, inheritedIndentation);
-                        if (childIndentationAmount !== -1 /* Unknown */) {
-                            inheritedIndentation = childIndentationAmount;
-                        }
-                    }
-                    // child node is outside the target range - do not dive inside
-                    if (!ts.rangeOverlapsWithStartEnd(originalRange, child.pos, child.end)) {
-                        return inheritedIndentation;
-                    }
-                    if (child.getFullWidth() === 0) {
-                        return inheritedIndentation;
-                    }
-                    while (formattingScanner.isOnToken()) {
-                        // proceed any parent tokens that are located prior to child.getStart()
-                        var tokenInfo = formattingScanner.readTokenInfo(node);
-                        if (tokenInfo.token.end > childStartPos) {
-                            // stop when formatting scanner advances past the beginning of the child
-                            break;
-                        }
-                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation);
-                    }
-                    if (!formattingScanner.isOnToken()) {
-                        return inheritedIndentation;
-                    }
-                    if (ts.isToken(child)) {
-                        // if child node is a token, it does not impact indentation, proceed it using parent indentation scope rules
-                        var tokenInfo = formattingScanner.readTokenInfo(child);
-                        ts.Debug.assert(tokenInfo.token.end === child.end);
-                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
-                        return inheritedIndentation;
-                    }
-                    var effectiveParentStartLine = child.kind === 143 /* Decorator */ ? childStartLine : undecoratedParentStartLine;
-                    var childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
-                    processNode(child, childContextNode, childStartLine, undecoratedChildStartLine, childIndentation.indentation, childIndentation.delta);
-                    childContextNode = node;
-                    if (isFirstListItem && parent.kind === 170 /* ArrayLiteralExpression */ && inheritedIndentation === -1 /* Unknown */) {
-                        inheritedIndentation = childIndentation.indentation;
-                    }
-                    return inheritedIndentation;
-                }
-                function processChildNodes(nodes, parent, parentStartLine, parentDynamicIndentation) {
-                    var listStartToken = getOpenTokenForList(parent, nodes);
-                    var listEndToken = getCloseTokenForOpenToken(listStartToken);
-                    var listDynamicIndentation = parentDynamicIndentation;
-                    var startLine = parentStartLine;
-                    if (listStartToken !== 0 /* Unknown */) {
-                        // introduce a new indentation scope for lists (including list start and end tokens)
-                        while (formattingScanner.isOnToken()) {
-                            var tokenInfo = formattingScanner.readTokenInfo(parent);
-                            if (tokenInfo.token.end > nodes.pos) {
-                                // stop when formatting scanner moves past the beginning of node list
-                                break;
-                            }
-                            else if (tokenInfo.token.kind === listStartToken) {
-                                // consume list start token
-                                startLine = sourceFile.getLineAndCharacterOfPosition(tokenInfo.token.pos).line;
-                                var indentation_1 = computeIndentation(tokenInfo.token, startLine, -1 /* Unknown */, parent, parentDynamicIndentation, parentStartLine);
-                                listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation_1.indentation, indentation_1.delta);
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
-                            }
-                            else {
-                                // consume any tokens that precede the list as child elements of 'node' using its indentation scope
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation);
-                            }
-                        }
-                    }
-                    var inheritedIndentation = -1 /* Unknown */;
-                    for (var i = 0; i < nodes.length; i++) {
-                        var child = nodes[i];
-                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListItem*/ true, /*isFirstListItem*/ i === 0);
-                    }
-                    if (listEndToken !== 0 /* Unknown */) {
-                        if (formattingScanner.isOnToken()) {
-                            var tokenInfo = formattingScanner.readTokenInfo(parent);
-                            // consume the list end token only if it is still belong to the parent
-                            // there might be the case when current token matches end token but does not considered as one
-                            // function (x: function) <--
-                            // without this check close paren will be interpreted as list end token for function expression which is wrong
-                            if (tokenInfo.token.kind === listEndToken && ts.rangeContainsRange(parent, tokenInfo.token)) {
-                                // consume list end token
-                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
-                            }
-                        }
-                    }
-                }
-                function consumeTokenAndAdvanceScanner(currentTokenInfo, parent, dynamicIndentation, container) {
-                    ts.Debug.assert(ts.rangeContainsRange(parent, currentTokenInfo.token));
-                    var lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
-                    var indentToken = false;
-                    if (currentTokenInfo.leadingTrivia) {
-                        processTrivia(currentTokenInfo.leadingTrivia, parent, childContextNode, dynamicIndentation);
-                    }
-                    var lineAdded;
-                    var isTokenInRange = ts.rangeContainsRange(originalRange, currentTokenInfo.token);
-                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
-                    if (isTokenInRange) {
-                        var rangeHasError = rangeContainsError(currentTokenInfo.token);
-                        // save previousRange since processRange will overwrite this value with current one
-                        var savePreviousRange = previousRange;
-                        lineAdded = processRange(currentTokenInfo.token, tokenStart, parent, childContextNode, dynamicIndentation);
-                        if (rangeHasError) {
-                            // do not indent comments\token if token range overlaps with some error
-                            indentToken = false;
-                        }
-                        else {
-                            if (lineAdded !== undefined) {
-                                indentToken = lineAdded;
-                            }
-                            else {
-                                // indent token only if end line of previous range does not match start line of the token
-                                var prevEndLine = savePreviousRange && sourceFile.getLineAndCharacterOfPosition(savePreviousRange.end).line;
-                                indentToken = lastTriviaWasNewLine && tokenStart.line !== prevEndLine;
-                            }
-                        }
-                    }
-                    if (currentTokenInfo.trailingTrivia) {
-                        processTrivia(currentTokenInfo.trailingTrivia, parent, childContextNode, dynamicIndentation);
-                    }
-                    if (indentToken) {
-                        var tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
-                            dynamicIndentation.getIndentationForToken(tokenStart.line, currentTokenInfo.token.kind, container) :
-                            -1 /* Unknown */;
-                        var indentNextTokenOrTrivia = true;
-                        if (currentTokenInfo.leadingTrivia) {
-                            var commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
-                            for (var _i = 0, _a = currentTokenInfo.leadingTrivia; _i < _a.length; _i++) {
-                                var triviaItem = _a[_i];
-                                var triviaInRange = ts.rangeContainsRange(originalRange, triviaItem);
-                                switch (triviaItem.kind) {
-                                    case 3 /* MultiLineCommentTrivia */:
-                                        if (triviaInRange) {
-                                            indentMultilineComment(triviaItem, commentIndentation, /*firstLineIsIndented*/ !indentNextTokenOrTrivia);
-                                        }
-                                        indentNextTokenOrTrivia = false;
-                                        break;
-                                    case 2 /* SingleLineCommentTrivia */:
-                                        if (indentNextTokenOrTrivia && triviaInRange) {
-                                            insertIndentation(triviaItem.pos, commentIndentation, /*lineAdded*/ false);
-                                        }
-                                        indentNextTokenOrTrivia = false;
-                                        break;
-                                    case 4 /* NewLineTrivia */:
-                                        indentNextTokenOrTrivia = true;
-                                        break;
-                                }
-                            }
-                        }
-                        // indent token only if is it is in target range and does not overlap with any error ranges
-                        if (tokenIndentation !== -1 /* Unknown */ && indentNextTokenOrTrivia) {
-                            insertIndentation(currentTokenInfo.token.pos, tokenIndentation, lineAdded);
-                            lastIndentedLine = tokenStart.line;
-                            indentationOnLastIndentedLine = tokenIndentation;
-                        }
-                    }
-                    formattingScanner.advance();
-                    childContextNode = parent;
-                }
-            }
-            function processTrivia(trivia, parent, contextNode, dynamicIndentation) {
-                for (var _i = 0, trivia_1 = trivia; _i < trivia_1.length; _i++) {
-                    var triviaItem = trivia_1[_i];
-                    if (ts.isComment(triviaItem.kind) && ts.rangeContainsRange(originalRange, triviaItem)) {
-                        var triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
-                        processRange(triviaItem, triviaItemStart, parent, contextNode, dynamicIndentation);
-                    }
-                }
-            }
-            function processRange(range, rangeStart, parent, contextNode, dynamicIndentation) {
-                var rangeHasError = rangeContainsError(range);
-                var lineAdded;
-                if (!rangeHasError && !previousRangeHasError) {
-                    if (!previousRange) {
-                        // trim whitespaces starting from the beginning of the span up to the current line
-                        var originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
-                        trimTrailingWhitespacesForLines(originalStart.line, rangeStart.line);
-                    }
-                    else {
-                        lineAdded =
-                            processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation);
-                    }
-                }
-                previousRange = range;
-                previousParent = parent;
-                previousRangeStartLine = rangeStart.line;
-                previousRangeHasError = rangeHasError;
-                return lineAdded;
-            }
-            function processPair(currentItem, currentStartLine, currentParent, previousItem, previousStartLine, previousParent, contextNode, dynamicIndentation) {
-                formattingContext.updateContext(previousItem, previousParent, currentItem, currentParent, contextNode);
-                var rule = rulesProvider.getRulesMap().GetRule(formattingContext);
-                var trimTrailingWhitespaces;
-                var lineAdded;
-                if (rule) {
-                    applyRuleEdits(rule, previousItem, previousStartLine, currentItem, currentStartLine);
-                    if (rule.Operation.Action & (2 /* Space */ | 8 /* Delete */) && currentStartLine !== previousStartLine) {
-                        lineAdded = false;
-                        // Handle the case where the next line is moved to be the end of this line.
-                        // In this case we don't indent the next line in the next pass.
-                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ false);
-                        }
-                    }
-                    else if (rule.Operation.Action & 4 /* NewLine */ && currentStartLine === previousStartLine) {
-                        lineAdded = true;
-                        // Handle the case where token2 is moved to the new line.
-                        // In this case we indent token2 in the next pass but we set
-                        // sameLineIndent flag to notify the indenter that the indentation is within the line.
-                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
-                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ true);
-                        }
-                    }
-                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
-                    trimTrailingWhitespaces = !(rule.Operation.Action & 8 /* Delete */) && rule.Flag !== 1 /* CanDeleteNewLines */;
-                }
-                else {
-                    trimTrailingWhitespaces = true;
-                }
-                if (currentStartLine !== previousStartLine && trimTrailingWhitespaces) {
-                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
-                    trimTrailingWhitespacesForLines(previousStartLine, currentStartLine, previousItem);
-                }
-                return lineAdded;
-            }
-            function insertIndentation(pos, indentation, lineAdded) {
-                var indentationString = getIndentationString(indentation, options);
-                if (lineAdded) {
-                    // new line is added before the token by the formatting rules
-                    // insert indentation string at the very beginning of the token
-                    recordReplace(pos, 0, indentationString);
-                }
-                else {
-                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
-                    var startLinePosition = ts.getStartPositionOfLine(tokenStart.line, sourceFile);
-                    if (indentation !== tokenStart.character || indentationIsDifferent(indentationString, startLinePosition)) {
-                        recordReplace(startLinePosition, tokenStart.character, indentationString);
-                    }
-                }
-            }
-            function indentationIsDifferent(indentationString, startLinePosition) {
-                return indentationString !== sourceFile.text.substr(startLinePosition, indentationString.length);
-            }
-            function indentMultilineComment(commentRange, indentation, firstLineIsIndented) {
-                // split comment in lines
-                var startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
-                var endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
-                var parts;
-                if (startLine === endLine) {
-                    if (!firstLineIsIndented) {
-                        // treat as single line comment
-                        insertIndentation(commentRange.pos, indentation, /*lineAdded*/ false);
-                    }
-                    return;
-                }
-                else {
-                    parts = [];
-                    var startPos = commentRange.pos;
-                    for (var line = startLine; line < endLine; line++) {
-                        var endOfLine = ts.getEndLinePosition(line, sourceFile);
-                        parts.push({ pos: startPos, end: endOfLine });
-                        startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
-                    }
-                    parts.push({ pos: startPos, end: commentRange.end });
-                }
-                var startLinePos = ts.getStartPositionOfLine(startLine, sourceFile);
-                var nonWhitespaceColumnInFirstPart = formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(startLinePos, parts[0].pos, sourceFile, options);
-                if (indentation === nonWhitespaceColumnInFirstPart.column) {
-                    return;
-                }
-                var startIndex = 0;
-                if (firstLineIsIndented) {
-                    startIndex = 1;
-                    startLine++;
-                }
-                // shift all parts on the delta size
-                var delta = indentation - nonWhitespaceColumnInFirstPart.column;
-                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
-                    var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
-                    var nonWhitespaceCharacterAndColumn = i === 0
-                        ? nonWhitespaceColumnInFirstPart
-                        : formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(parts[i].pos, parts[i].end, sourceFile, options);
-                    var newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
-                    if (newIndentation > 0) {
-                        var indentationString = getIndentationString(newIndentation, options);
-                        recordReplace(startLinePos_1, nonWhitespaceCharacterAndColumn.character, indentationString);
-                    }
-                    else {
-                        recordDelete(startLinePos_1, nonWhitespaceCharacterAndColumn.character);
-                    }
-                }
-            }
-            function trimTrailingWhitespacesForLines(line1, line2, range) {
-                for (var line = line1; line < line2; line++) {
-                    var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
-                    var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
-                    // do not trim whitespaces in comments or template expression
-                    if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
-                        continue;
-                    }
-                    var whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
-                    if (whitespaceStart !== -1) {
-                        ts.Debug.assert(whitespaceStart === lineStartPosition || !ts.isWhiteSpace(sourceFile.text.charCodeAt(whitespaceStart - 1)));
-                        recordDelete(whitespaceStart, lineEndPosition + 1 - whitespaceStart);
-                    }
-                }
-            }
-            /**
-             * @param start The position of the first character in range
-             * @param end The position of the last character in range
-             */
-            function getTrailingWhitespaceStartPosition(start, end) {
-                var pos = end;
-                while (pos >= start && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
-                    pos--;
-                }
-                if (pos !== end) {
-                    return pos + 1;
-                }
-                return -1;
-            }
-            /**
-             * Trimming will be done for lines after the previous range
-             */
-            function trimTrailingWhitespacesForRemainingRange() {
-                var startPosition = previousRange ? previousRange.end : originalRange.pos;
-                var startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
-                var endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
-                trimTrailingWhitespacesForLines(startLine, endLine + 1, previousRange);
-            }
-            function newTextChange(start, len, newText) {
-                return { span: ts.createTextSpan(start, len), newText: newText };
-            }
-            function recordDelete(start, len) {
-                if (len) {
-                    edits.push(newTextChange(start, len, ""));
-                }
-            }
-            function recordReplace(start, len, newText) {
-                if (len || newText) {
-                    edits.push(newTextChange(start, len, newText));
-                }
-            }
-            function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
-                switch (rule.Operation.Action) {
-                    case 1 /* Ignore */:
-                        // no action required
-                        return;
-                    case 8 /* Delete */:
-                        if (previousRange.end !== currentRange.pos) {
-                            // delete characters starting from t1.end up to t2.pos exclusive
-                            recordDelete(previousRange.end, currentRange.pos - previousRange.end);
-                        }
-                        break;
-                    case 4 /* NewLine */:
-                        // exit early if we on different lines and rule cannot change number of newlines
-                        // if line1 and line2 are on subsequent lines then no edits are required - ok to exit
-                        // if line1 and line2 are separated with more than one newline - ok to exit since we cannot delete extra new lines
-                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
-                            return;
-                        }
-                        // edit should not be applied only if we have one line feed between elements
-                        var lineDelta = currentStartLine - previousStartLine;
-                        if (lineDelta !== 1) {
-                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, options.NewLineCharacter);
-                        }
-                        break;
-                    case 2 /* Space */:
-                        // exit early if we on different lines and rule cannot change number of newlines
-                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
-                            return;
-                        }
-                        var posDelta = currentRange.pos - previousRange.end;
-                        if (posDelta !== 1 || sourceFile.text.charCodeAt(previousRange.end) !== 32 /* space */) {
-                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, " ");
-                        }
-                        break;
-                }
-            }
-        }
-        function getOpenTokenForList(node, list) {
-            switch (node.kind) {
-                case 148 /* Constructor */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 180 /* ArrowFunction */:
-                    if (node.typeParameters === list) {
-                        return 25 /* LessThanToken */;
-                    }
-                    else if (node.parameters === list) {
-                        return 17 /* OpenParenToken */;
-                    }
-                    break;
-                case 174 /* CallExpression */:
-                case 175 /* NewExpression */:
-                    if (node.typeArguments === list) {
-                        return 25 /* LessThanToken */;
-                    }
-                    else if (node.arguments === list) {
-                        return 17 /* OpenParenToken */;
-                    }
-                    break;
-                case 155 /* TypeReference */:
-                    if (node.typeArguments === list) {
-                        return 25 /* LessThanToken */;
-                    }
-            }
-            return 0 /* Unknown */;
-        }
-        function getCloseTokenForOpenToken(kind) {
-            switch (kind) {
-                case 17 /* OpenParenToken */:
-                    return 18 /* CloseParenToken */;
-                case 25 /* LessThanToken */:
-                    return 27 /* GreaterThanToken */;
-            }
-            return 0 /* Unknown */;
-        }
-        var internedSizes;
-        var internedTabsIndentation;
-        var internedSpacesIndentation;
-        function getIndentationString(indentation, options) {
-            // reset interned strings if FormatCodeOptions were changed
-            var resetInternedStrings = !internedSizes || (internedSizes.tabSize !== options.TabSize || internedSizes.indentSize !== options.IndentSize);
-            if (resetInternedStrings) {
-                internedSizes = { tabSize: options.TabSize, indentSize: options.IndentSize };
-                internedTabsIndentation = internedSpacesIndentation = undefined;
-            }
-            if (!options.ConvertTabsToSpaces) {
-                var tabs = Math.floor(indentation / options.TabSize);
-                var spaces = indentation - tabs * options.TabSize;
-                var tabString = void 0;
-                if (!internedTabsIndentation) {
-                    internedTabsIndentation = [];
-                }
-                if (internedTabsIndentation[tabs] === undefined) {
-                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
-                }
-                else {
-                    tabString = internedTabsIndentation[tabs];
-                }
-                return spaces ? tabString + repeat(" ", spaces) : tabString;
-            }
-            else {
-                var spacesString = void 0;
-                var quotient = Math.floor(indentation / options.IndentSize);
-                var remainder = indentation % options.IndentSize;
-                if (!internedSpacesIndentation) {
-                    internedSpacesIndentation = [];
-                }
-                if (internedSpacesIndentation[quotient] === undefined) {
-                    spacesString = repeat(" ", options.IndentSize * quotient);
-                    internedSpacesIndentation[quotient] = spacesString;
-                }
-                else {
-                    spacesString = internedSpacesIndentation[quotient];
-                }
-                return remainder ? spacesString + repeat(" ", remainder) : spacesString;
-            }
-            function repeat(value, count) {
-                var s = "";
-                for (var i = 0; i < count; i++) {
-                    s += value;
-                }
-                return s;
-            }
-        }
-        formatting.getIndentationString = getIndentationString;
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-///<reference path='..\services.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var formatting;
-    (function (formatting) {
-        var SmartIndenter;
-        (function (SmartIndenter) {
-            var Value;
-            (function (Value) {
-                Value[Value["Unknown"] = -1] = "Unknown";
-            })(Value || (Value = {}));
-            function getIndentation(position, sourceFile, options) {
-                if (position > sourceFile.text.length) {
-                    return 0; // past EOF
-                }
-                // no indentation when the indent style is set to none,
-                // so we can return fast
-                if (options.IndentStyle === ts.IndentStyle.None) {
-                    return 0;
-                }
-                var precedingToken = ts.findPrecedingToken(position, sourceFile);
-                if (!precedingToken) {
-                    return 0;
-                }
-                // no indentation in string \regex\template literals
-                var precedingTokenIsLiteral = ts.isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
-                if (precedingTokenIsLiteral && precedingToken.getStart(sourceFile) <= position && precedingToken.end > position) {
-                    return 0;
-                }
-                var lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
-                // indentation is first non-whitespace character in a previous line
-                // for block indentation, we should look for a line which contains something that's not
-                // whitespace.
-                if (options.IndentStyle === ts.IndentStyle.Block) {
-                    // move backwards until we find a line with a non-whitespace character,
-                    // then find the first non-whitespace character for that line.
-                    var current_1 = position;
-                    while (current_1 > 0) {
-                        var char = sourceFile.text.charCodeAt(current_1);
-                        if (!ts.isWhiteSpace(char) && !ts.isLineBreak(char)) {
-                            break;
-                        }
-                        current_1--;
-                    }
-                    var lineStart = ts.getLineStartPositionForPosition(current_1, sourceFile);
-                    return SmartIndenter.findFirstNonWhitespaceColumn(lineStart, current_1, sourceFile, options);
-                }
-                if (precedingToken.kind === 24 /* CommaToken */ && precedingToken.parent.kind !== 187 /* BinaryExpression */) {
-                    // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
-                    var actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
-                    if (actualIndentation !== -1 /* Unknown */) {
-                        return actualIndentation;
-                    }
-                }
-                // try to find node that can contribute to indentation and includes 'position' starting from 'precedingToken'
-                // if such node is found - compute initial indentation for 'position' inside this node
-                var previous;
-                var current = precedingToken;
-                var currentStart;
-                var indentationDelta;
-                while (current) {
-                    if (ts.positionBelongsToNode(current, position, sourceFile) && shouldIndentChildNode(current, previous)) {
-                        currentStart = getStartLineAndCharacterForNode(current, sourceFile);
-                        if (nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile)) {
-                            indentationDelta = 0;
-                        }
-                        else {
-                            indentationDelta = lineAtPosition !== currentStart.line ? options.IndentSize : 0;
-                        }
-                        break;
-                    }
-                    // check if current node is a list item - if yes, take indentation from it
-                    var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
-                    if (actualIndentation !== -1 /* Unknown */) {
-                        return actualIndentation;
-                    }
-                    actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
-                    if (actualIndentation !== -1 /* Unknown */) {
-                        return actualIndentation + options.IndentSize;
-                    }
-                    previous = current;
-                    current = current.parent;
-                }
-                if (!current) {
-                    // no parent was found - return 0 to be indented on the level of SourceFile
-                    return 0;
-                }
-                return getIndentationForNodeWorker(current, currentStart, /*ignoreActualIndentationRange*/ undefined, indentationDelta, sourceFile, options);
-            }
-            SmartIndenter.getIndentation = getIndentation;
-            function getIndentationForNode(n, ignoreActualIndentationRange, sourceFile, options) {
-                var start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
-                return getIndentationForNodeWorker(n, start, ignoreActualIndentationRange, /*indentationDelta*/ 0, sourceFile, options);
-            }
-            SmartIndenter.getIndentationForNode = getIndentationForNode;
-            function getIndentationForNodeWorker(current, currentStart, ignoreActualIndentationRange, indentationDelta, sourceFile, options) {
-                var parent = current.parent;
-                var parentStart;
-                // walk upwards and collect indentations for pairs of parent-child nodes
-                // indentation is not added if parent and child nodes start on the same line or if parent is IfStatement and child starts on the same line with 'else clause'
-                while (parent) {
-                    var useActualIndentation = true;
-                    if (ignoreActualIndentationRange) {
-                        var start = current.getStart(sourceFile);
-                        useActualIndentation = start < ignoreActualIndentationRange.pos || start > ignoreActualIndentationRange.end;
-                    }
-                    if (useActualIndentation) {
-                        // check if current node is a list item - if yes, take indentation from it
-                        var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
-                        if (actualIndentation !== -1 /* Unknown */) {
-                            return actualIndentation + indentationDelta;
-                        }
-                    }
-                    parentStart = getParentStart(parent, current, sourceFile);
-                    var parentAndChildShareLine = parentStart.line === currentStart.line ||
-                        childStartsOnTheSameLineWithElseInIfStatement(parent, current, currentStart.line, sourceFile);
-                    if (useActualIndentation) {
-                        // try to fetch actual indentation for current node from source text
-                        var actualIndentation = getActualIndentationForNode(current, parent, currentStart, parentAndChildShareLine, sourceFile, options);
-                        if (actualIndentation !== -1 /* Unknown */) {
-                            return actualIndentation + indentationDelta;
-                        }
-                        actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
-                        if (actualIndentation !== -1 /* Unknown */) {
-                            return actualIndentation + indentationDelta;
-                        }
-                    }
-                    // increase indentation if parent node wants its content to be indented and parent and child nodes don't start on the same line
-                    if (shouldIndentChildNode(parent, current) && !parentAndChildShareLine) {
-                        indentationDelta += options.IndentSize;
-                    }
-                    current = parent;
-                    currentStart = parentStart;
-                    parent = current.parent;
-                }
-                return indentationDelta;
-            }
-            function getParentStart(parent, child, sourceFile) {
-                var containingList = getContainingList(child, sourceFile);
-                if (containingList) {
-                    return sourceFile.getLineAndCharacterOfPosition(containingList.pos);
-                }
-                return sourceFile.getLineAndCharacterOfPosition(parent.getStart(sourceFile));
-            }
-            /*
-             * Function returns Value.Unknown if indentation cannot be determined
-             */
-            function getActualIndentationForListItemBeforeComma(commaToken, sourceFile, options) {
-                // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
-                var commaItemInfo = ts.findListItemInfo(commaToken);
-                if (commaItemInfo && commaItemInfo.listItemIndex > 0) {
-                    return deriveActualIndentationFromList(commaItemInfo.list.getChildren(), commaItemInfo.listItemIndex - 1, sourceFile, options);
-                }
-                else {
-                    // handle broken code gracefully
-                    return -1 /* Unknown */;
-                }
-            }
-            /*
-             * Function returns Value.Unknown if actual indentation for node should not be used (i.e because node is nested expression)
-             */
-            function getActualIndentationForNode(current, parent, currentLineAndChar, parentAndChildShareLine, sourceFile, options) {
-                // actual indentation is used for statements\declarations if one of cases below is true:
-                // - parent is SourceFile - by default immediate children of SourceFile are not indented except when user indents them manually
-                // - parent and child are not on the same line
-                var useActualIndentation = (ts.isDeclaration(current) || ts.isStatement(current)) &&
-                    (parent.kind === 256 /* SourceFile */ || !parentAndChildShareLine);
-                if (!useActualIndentation) {
-                    return -1 /* Unknown */;
-                }
-                return findColumnForFirstNonWhitespaceCharacterInLine(currentLineAndChar, sourceFile, options);
-            }
-            function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile) {
-                var nextToken = ts.findNextToken(precedingToken, current);
-                if (!nextToken) {
-                    return false;
-                }
-                if (nextToken.kind === 15 /* OpenBraceToken */) {
-                    // open braces are always indented at the parent level
-                    return true;
-                }
-                else if (nextToken.kind === 16 /* CloseBraceToken */) {
-                    // close braces are indented at the parent level if they are located on the same line with cursor
-                    // this means that if new line will be added at $ position, this case will be indented
-                    // class A {
-                    //    $
-                    // }
-                    /// and this one - not
-                    // class A {
-                    // $}
-                    var nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
-                    return lineAtPosition === nextTokenStartLine;
-                }
-                return false;
-            }
-            function getStartLineAndCharacterForNode(n, sourceFile) {
-                return sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
-            }
-            function childStartsOnTheSameLineWithElseInIfStatement(parent, child, childStartLine, sourceFile) {
-                if (parent.kind === 203 /* IfStatement */ && parent.elseStatement === child) {
-                    var elseKeyword = ts.findChildOfKind(parent, 80 /* ElseKeyword */, sourceFile);
-                    ts.Debug.assert(elseKeyword !== undefined);
-                    var elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
-                    return elseKeywordStartLine === childStartLine;
-                }
-                return false;
-            }
-            SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement = childStartsOnTheSameLineWithElseInIfStatement;
-            function getContainingList(node, sourceFile) {
-                if (node.parent) {
-                    switch (node.parent.kind) {
-                        case 155 /* TypeReference */:
-                            if (node.parent.typeArguments &&
-                                ts.rangeContainsStartEnd(node.parent.typeArguments, node.getStart(sourceFile), node.getEnd())) {
-                                return node.parent.typeArguments;
-                            }
-                            break;
-                        case 171 /* ObjectLiteralExpression */:
-                            return node.parent.properties;
-                        case 170 /* ArrayLiteralExpression */:
-                            return node.parent.elements;
-                        case 220 /* FunctionDeclaration */:
-                        case 179 /* FunctionExpression */:
-                        case 180 /* ArrowFunction */:
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 151 /* CallSignature */:
-                        case 152 /* ConstructSignature */: {
-                            var start = node.getStart(sourceFile);
-                            if (node.parent.typeParameters &&
-                                ts.rangeContainsStartEnd(node.parent.typeParameters, start, node.getEnd())) {
-                                return node.parent.typeParameters;
-                            }
-                            if (ts.rangeContainsStartEnd(node.parent.parameters, start, node.getEnd())) {
-                                return node.parent.parameters;
-                            }
-                            break;
-                        }
-                        case 175 /* NewExpression */:
-                        case 174 /* CallExpression */: {
-                            var start = node.getStart(sourceFile);
-                            if (node.parent.typeArguments &&
-                                ts.rangeContainsStartEnd(node.parent.typeArguments, start, node.getEnd())) {
-                                return node.parent.typeArguments;
-                            }
-                            if (node.parent.arguments &&
-                                ts.rangeContainsStartEnd(node.parent.arguments, start, node.getEnd())) {
-                                return node.parent.arguments;
-                            }
-                            break;
-                        }
-                    }
-                }
-                return undefined;
-            }
-            function getActualIndentationForListItem(node, sourceFile, options) {
-                var containingList = getContainingList(node, sourceFile);
-                return containingList ? getActualIndentationFromList(containingList) : -1 /* Unknown */;
-                function getActualIndentationFromList(list) {
-                    var index = ts.indexOf(list, node);
-                    return index !== -1 ? deriveActualIndentationFromList(list, index, sourceFile, options) : -1 /* Unknown */;
-                }
-            }
-            function getLineIndentationWhenExpressionIsInMultiLine(node, sourceFile, options) {
-                // actual indentation should not be used when:
-                // - node is close parenthesis - this is the end of the expression
-                if (node.kind === 18 /* CloseParenToken */) {
-                    return -1 /* Unknown */;
-                }
-                if (node.parent && (node.parent.kind === 174 /* CallExpression */ ||
-                    node.parent.kind === 175 /* NewExpression */) &&
-                    node.parent.expression !== node) {
-                    var fullCallOrNewExpression = node.parent.expression;
-                    var startingExpression = getStartingExpression(fullCallOrNewExpression);
-                    if (fullCallOrNewExpression === startingExpression) {
-                        return -1 /* Unknown */;
-                    }
-                    var fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
-                    var startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
-                    if (fullCallOrNewExpressionEnd.line === startingExpressionEnd.line) {
-                        return -1 /* Unknown */;
-                    }
-                    return findColumnForFirstNonWhitespaceCharacterInLine(fullCallOrNewExpressionEnd, sourceFile, options);
-                }
-                return -1 /* Unknown */;
-                function getStartingExpression(node) {
-                    while (true) {
-                        switch (node.kind) {
-                            case 174 /* CallExpression */:
-                            case 175 /* NewExpression */:
-                            case 172 /* PropertyAccessExpression */:
-                            case 173 /* ElementAccessExpression */:
-                                node = node.expression;
-                                break;
-                            default:
-                                return node;
-                        }
-                    }
-                }
-            }
-            function deriveActualIndentationFromList(list, index, sourceFile, options) {
-                ts.Debug.assert(index >= 0 && index < list.length);
-                var node = list[index];
-                // walk toward the start of the list starting from current node and check if the line is the same for all items.
-                // if end line for item [i - 1] differs from the start line for item [i] - find column of the first non-whitespace character on the line of item [i]
-                var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
-                for (var i = index - 1; i >= 0; i--) {
-                    if (list[i].kind === 24 /* CommaToken */) {
-                        continue;
-                    }
-                    // skip list items that ends on the same line with the current list element
-                    var prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
-                    if (prevEndLine !== lineAndCharacter.line) {
-                        return findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options);
-                    }
-                    lineAndCharacter = getStartLineAndCharacterForNode(list[i], sourceFile);
-                }
-                return -1 /* Unknown */;
-            }
-            function findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options) {
-                var lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
-                return findFirstNonWhitespaceColumn(lineStart, lineStart + lineAndCharacter.character, sourceFile, options);
-            }
-            /*
-                Character is the actual index of the character since the beginning of the line.
-                Column - position of the character after expanding tabs to spaces
-                "0\t2$"
-                value of 'character' for '$' is 3
-                value of 'column' for '$' is 6 (assuming that tab size is 4)
-            */
-            function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
-                var character = 0;
-                var column = 0;
-                for (var pos = startPos; pos < endPos; pos++) {
-                    var ch = sourceFile.text.charCodeAt(pos);
-                    if (!ts.isWhiteSpace(ch)) {
-                        break;
-                    }
-                    if (ch === 9 /* tab */) {
-                        column += options.TabSize + (column % options.TabSize);
-                    }
-                    else {
-                        column++;
-                    }
-                    character++;
-                }
-                return { column: column, character: character };
-            }
-            SmartIndenter.findFirstNonWhitespaceCharacterAndColumn = findFirstNonWhitespaceCharacterAndColumn;
-            function findFirstNonWhitespaceColumn(startPos, endPos, sourceFile, options) {
-                return findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options).column;
-            }
-            SmartIndenter.findFirstNonWhitespaceColumn = findFirstNonWhitespaceColumn;
-            function nodeContentIsAlwaysIndented(kind) {
-                switch (kind) {
-                    case 202 /* ExpressionStatement */:
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 170 /* ArrayLiteralExpression */:
-                    case 199 /* Block */:
-                    case 226 /* ModuleBlock */:
-                    case 171 /* ObjectLiteralExpression */:
-                    case 159 /* TypeLiteral */:
-                    case 161 /* TupleType */:
-                    case 227 /* CaseBlock */:
-                    case 250 /* DefaultClause */:
-                    case 249 /* CaseClause */:
-                    case 178 /* ParenthesizedExpression */:
-                    case 172 /* PropertyAccessExpression */:
-                    case 174 /* CallExpression */:
-                    case 175 /* NewExpression */:
-                    case 200 /* VariableStatement */:
-                    case 218 /* VariableDeclaration */:
-                    case 235 /* ExportAssignment */:
-                    case 211 /* ReturnStatement */:
-                    case 188 /* ConditionalExpression */:
-                    case 168 /* ArrayBindingPattern */:
-                    case 167 /* ObjectBindingPattern */:
-                    case 243 /* JsxOpeningElement */:
-                    case 242 /* JsxSelfClosingElement */:
-                    case 248 /* JsxExpression */:
-                    case 146 /* MethodSignature */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 142 /* Parameter */:
-                    case 156 /* FunctionType */:
-                    case 157 /* ConstructorType */:
-                    case 164 /* ParenthesizedType */:
-                    case 176 /* TaggedTemplateExpression */:
-                    case 184 /* AwaitExpression */:
-                    case 233 /* NamedImports */:
-                        return true;
-                }
-                return false;
-            }
-            /* @internal */
-            function nodeWillIndentChild(parent, child, indentByDefault) {
-                var childKind = child ? child.kind : 0 /* Unknown */;
-                switch (parent.kind) {
-                    case 204 /* DoStatement */:
-                    case 205 /* WhileStatement */:
-                    case 207 /* ForInStatement */:
-                    case 208 /* ForOfStatement */:
-                    case 206 /* ForStatement */:
-                    case 203 /* IfStatement */:
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 147 /* MethodDeclaration */:
-                    case 180 /* ArrowFunction */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        return childKind !== 199 /* Block */;
-                    case 241 /* JsxElement */:
-                        return childKind !== 245 /* JsxClosingElement */;
-                }
-                // No explicit rule for given nodes so the result will follow the default value argument
-                return indentByDefault;
-            }
-            SmartIndenter.nodeWillIndentChild = nodeWillIndentChild;
-            /*
-            Function returns true when the parent node should indent the given child by an explicit rule
-            */
-            function shouldIndentChildNode(parent, child) {
-                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, /*indentByDefault*/ false);
-            }
-            SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
-        })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
-    })(formatting = ts.formatting || (ts.formatting = {}));
-})(ts || (ts = {}));
-/// <reference path="..\compiler\program.ts"/>
-/// <reference path='breakpoints.ts' />
-/// <reference path='outliningElementsCollector.ts' />
-/// <reference path='navigateTo.ts' />
-/// <reference path='navigationBar.ts' />
-/// <reference path='patternMatcher.ts' />
-/// <reference path='signatureHelp.ts' />
-/// <reference path='utilities.ts' />
-/// <reference path='jsTyping.ts' />
-/// <reference path='formatting\formatting.ts' />
-/// <reference path='formatting\smartIndenter.ts' />
-var ts;
-(function (ts) {
-    /** The version of the language service API */
-    ts.servicesVersion = "0.5";
-    var ScriptSnapshot;
-    (function (ScriptSnapshot) {
-        var StringScriptSnapshot = (function () {
-            function StringScriptSnapshot(text) {
-                this.text = text;
-            }
-            StringScriptSnapshot.prototype.getText = function (start, end) {
-                return this.text.substring(start, end);
-            };
-            StringScriptSnapshot.prototype.getLength = function () {
-                return this.text.length;
-            };
-            StringScriptSnapshot.prototype.getChangeRange = function (oldSnapshot) {
-                // Text-based snapshots do not support incremental parsing. Return undefined
-                // to signal that to the caller.
-                return undefined;
-            };
-            return StringScriptSnapshot;
-        }());
-        function fromString(text) {
-            return new StringScriptSnapshot(text);
-        }
-        ScriptSnapshot.fromString = fromString;
-    })(ScriptSnapshot = ts.ScriptSnapshot || (ts.ScriptSnapshot = {}));
-    var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ true);
-    var emptyArray = [];
-    var jsDocTagNames = [
-        "augments",
-        "author",
-        "argument",
-        "borrows",
-        "class",
-        "constant",
-        "constructor",
-        "constructs",
-        "default",
-        "deprecated",
-        "description",
-        "event",
-        "example",
-        "extends",
-        "field",
-        "fileOverview",
-        "function",
-        "ignore",
-        "inner",
-        "lends",
-        "link",
-        "memberOf",
-        "name",
-        "namespace",
-        "param",
-        "private",
-        "property",
-        "public",
-        "requires",
-        "returns",
-        "see",
-        "since",
-        "static",
-        "throws",
-        "type",
-        "version"
-    ];
-    var jsDocCompletionEntries;
-    function createNode(kind, pos, end, flags, parent) {
-        var node = new NodeObject(kind, pos, end);
-        node.flags = flags;
-        node.parent = parent;
-        return node;
-    }
-    var NodeObject = (function () {
-        function NodeObject(kind, pos, end) {
-            this.kind = kind;
-            this.pos = pos;
-            this.end = end;
-            this.flags = 0 /* None */;
-            this.parent = undefined;
-        }
-        NodeObject.prototype.getSourceFile = function () {
-            return ts.getSourceFileOfNode(this);
-        };
-        NodeObject.prototype.getStart = function (sourceFile) {
-            return ts.getTokenPosOfNode(this, sourceFile);
-        };
-        NodeObject.prototype.getFullStart = function () {
-            return this.pos;
-        };
-        NodeObject.prototype.getEnd = function () {
-            return this.end;
-        };
-        NodeObject.prototype.getWidth = function (sourceFile) {
-            return this.getEnd() - this.getStart(sourceFile);
-        };
-        NodeObject.prototype.getFullWidth = function () {
-            return this.end - this.pos;
-        };
-        NodeObject.prototype.getLeadingTriviaWidth = function (sourceFile) {
-            return this.getStart(sourceFile) - this.pos;
-        };
-        NodeObject.prototype.getFullText = function (sourceFile) {
-            return (sourceFile || this.getSourceFile()).text.substring(this.pos, this.end);
-        };
-        NodeObject.prototype.getText = function (sourceFile) {
-            return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
-        };
-        NodeObject.prototype.addSyntheticNodes = function (nodes, pos, end) {
-            scanner.setTextPos(pos);
-            while (pos < end) {
-                var token = scanner.scan();
-                var textPos = scanner.getTextPos();
-                nodes.push(createNode(token, pos, textPos, 0, this));
-                pos = textPos;
-            }
-            return pos;
-        };
-        NodeObject.prototype.createSyntaxList = function (nodes) {
-            var list = createNode(279 /* SyntaxList */, nodes.pos, nodes.end, 0, this);
-            list._children = [];
-            var pos = nodes.pos;
-            for (var _i = 0, nodes_7 = nodes; _i < nodes_7.length; _i++) {
-                var node = nodes_7[_i];
-                if (pos < node.pos) {
-                    pos = this.addSyntheticNodes(list._children, pos, node.pos);
-                }
-                list._children.push(node);
-                pos = node.end;
-            }
-            if (pos < nodes.end) {
-                this.addSyntheticNodes(list._children, pos, nodes.end);
-            }
-            return list;
-        };
-        NodeObject.prototype.createChildren = function (sourceFile) {
-            var _this = this;
-            var children;
-            if (this.kind >= 139 /* FirstNode */) {
-                scanner.setText((sourceFile || this.getSourceFile()).text);
-                children = [];
-                var pos_3 = this.pos;
-                var processNode = function (node) {
-                    if (pos_3 < node.pos) {
-                        pos_3 = _this.addSyntheticNodes(children, pos_3, node.pos);
-                    }
-                    children.push(node);
-                    pos_3 = node.end;
-                };
-                var processNodes = function (nodes) {
-                    if (pos_3 < nodes.pos) {
-                        pos_3 = _this.addSyntheticNodes(children, pos_3, nodes.pos);
-                    }
-                    children.push(_this.createSyntaxList(nodes));
-                    pos_3 = nodes.end;
-                };
-                ts.forEachChild(this, processNode, processNodes);
-                if (pos_3 < this.end) {
-                    this.addSyntheticNodes(children, pos_3, this.end);
-                }
-                scanner.setText(undefined);
-            }
-            this._children = children || emptyArray;
-        };
-        NodeObject.prototype.getChildCount = function (sourceFile) {
-            if (!this._children)
-                this.createChildren(sourceFile);
-            return this._children.length;
-        };
-        NodeObject.prototype.getChildAt = function (index, sourceFile) {
-            if (!this._children)
-                this.createChildren(sourceFile);
-            return this._children[index];
-        };
-        NodeObject.prototype.getChildren = function (sourceFile) {
-            if (!this._children)
-                this.createChildren(sourceFile);
-            return this._children;
-        };
-        NodeObject.prototype.getFirstToken = function (sourceFile) {
-            var children = this.getChildren(sourceFile);
-            if (!children.length) {
-                return undefined;
-            }
-            var child = children[0];
-            return child.kind < 139 /* FirstNode */ ? child : child.getFirstToken(sourceFile);
-        };
-        NodeObject.prototype.getLastToken = function (sourceFile) {
-            var children = this.getChildren(sourceFile);
-            var child = ts.lastOrUndefined(children);
-            if (!child) {
-                return undefined;
-            }
-            return child.kind < 139 /* FirstNode */ ? child : child.getLastToken(sourceFile);
-        };
-        return NodeObject;
-    }());
-    var SymbolObject = (function () {
-        function SymbolObject(flags, name) {
-            this.flags = flags;
-            this.name = name;
-        }
-        SymbolObject.prototype.getFlags = function () {
-            return this.flags;
-        };
-        SymbolObject.prototype.getName = function () {
-            return this.name;
-        };
-        SymbolObject.prototype.getDeclarations = function () {
-            return this.declarations;
-        };
-        SymbolObject.prototype.getDocumentationComment = function () {
-            if (this.documentationComment === undefined) {
-                this.documentationComment = getJsDocCommentsFromDeclarations(this.declarations, this.name, !(this.flags & 4 /* Property */));
-            }
-            return this.documentationComment;
-        };
-        return SymbolObject;
-    }());
-    function getJsDocCommentsFromDeclarations(declarations, name, canUseParsedParamTagComments) {
-        var documentationComment = [];
-        var docComments = getJsDocCommentsSeparatedByNewLines();
-        ts.forEach(docComments, function (docComment) {
-            if (documentationComment.length) {
-                documentationComment.push(ts.lineBreakPart());
-            }
-            documentationComment.push(docComment);
-        });
-        return documentationComment;
-        function getJsDocCommentsSeparatedByNewLines() {
-            var paramTag = "@param";
-            var jsDocCommentParts = [];
-            ts.forEach(declarations, function (declaration, indexOfDeclaration) {
-                // Make sure we are collecting doc comment from declaration once,
-                // In case of union property there might be same declaration multiple times
-                // which only varies in type parameter
-                // Eg. const a: Array<string> | Array<number>; a.length
-                // The property length will have two declarations of property length coming
-                // from Array<T> - Array<string> and Array<number>
-                if (ts.indexOf(declarations, declaration) === indexOfDeclaration) {
-                    var sourceFileOfDeclaration_1 = ts.getSourceFileOfNode(declaration);
-                    // If it is parameter - try and get the jsDoc comment with @param tag from function declaration's jsDoc comments
-                    if (canUseParsedParamTagComments && declaration.kind === 142 /* Parameter */) {
-                        ts.forEach(getJsDocCommentTextRange(declaration.parent, sourceFileOfDeclaration_1), function (jsDocCommentTextRange) {
-                            var cleanedParamJsDocComment = getCleanedParamJsDocComment(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration_1);
-                            if (cleanedParamJsDocComment) {
-                                ts.addRange(jsDocCommentParts, cleanedParamJsDocComment);
-                            }
-                        });
-                    }
-                    // If this is left side of dotted module declaration, there is no doc comments associated with this node
-                    if (declaration.kind === 225 /* ModuleDeclaration */ && declaration.body.kind === 225 /* ModuleDeclaration */) {
-                        return;
-                    }
-                    // If this is dotted module name, get the doc comments from the parent
-                    while (declaration.kind === 225 /* ModuleDeclaration */ && declaration.parent.kind === 225 /* ModuleDeclaration */) {
-                        declaration = declaration.parent;
-                    }
-                    // Get the cleaned js doc comment text from the declaration
-                    ts.forEach(getJsDocCommentTextRange(declaration.kind === 218 /* VariableDeclaration */ ? declaration.parent.parent : declaration, sourceFileOfDeclaration_1), function (jsDocCommentTextRange) {
-                        var cleanedJsDocComment = getCleanedJsDocComment(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration_1);
-                        if (cleanedJsDocComment) {
-                            ts.addRange(jsDocCommentParts, cleanedJsDocComment);
-                        }
-                    });
-                }
-            });
-            return jsDocCommentParts;
-            function getJsDocCommentTextRange(node, sourceFile) {
-                return ts.map(ts.getJsDocComments(node, sourceFile), function (jsDocComment) {
-                    return {
-                        pos: jsDocComment.pos + "/*".length,
-                        end: jsDocComment.end - "*/".length // Trim off comment end indicator
-                    };
-                });
-            }
-            function consumeWhiteSpacesOnTheLine(pos, end, sourceFile, maxSpacesToRemove) {
-                if (maxSpacesToRemove !== undefined) {
-                    end = Math.min(end, pos + maxSpacesToRemove);
-                }
-                for (; pos < end; pos++) {
-                    var ch = sourceFile.text.charCodeAt(pos);
-                    if (!ts.isWhiteSpace(ch) || ts.isLineBreak(ch)) {
-                        // Either found lineBreak or non whiteSpace
-                        return pos;
-                    }
-                }
-                return end;
-            }
-            function consumeLineBreaks(pos, end, sourceFile) {
-                while (pos < end && ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
-                    pos++;
-                }
-                return pos;
-            }
-            function isName(pos, end, sourceFile, name) {
-                return pos + name.length < end &&
-                    sourceFile.text.substr(pos, name.length) === name &&
-                    (ts.isWhiteSpace(sourceFile.text.charCodeAt(pos + name.length)) ||
-                        ts.isLineBreak(sourceFile.text.charCodeAt(pos + name.length)));
-            }
-            function isParamTag(pos, end, sourceFile) {
-                // If it is @param tag
-                return isName(pos, end, sourceFile, paramTag);
-            }
-            function pushDocCommentLineText(docComments, text, blankLineCount) {
-                // Add the empty lines in between texts
-                while (blankLineCount) {
-                    blankLineCount--;
-                    docComments.push(ts.textPart(""));
-                }
-                docComments.push(ts.textPart(text));
-            }
-            function getCleanedJsDocComment(pos, end, sourceFile) {
-                var spacesToRemoveAfterAsterisk;
-                var docComments = [];
-                var blankLineCount = 0;
-                var isInParamTag = false;
-                while (pos < end) {
-                    var docCommentTextOfLine = "";
-                    // First consume leading white space
-                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile);
-                    // If the comment starts with '*' consume the spaces on this line
-                    if (pos < end && sourceFile.text.charCodeAt(pos) === 42 /* asterisk */) {
-                        var lineStartPos = pos + 1;
-                        pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, spacesToRemoveAfterAsterisk);
-                        // Set the spaces to remove after asterisk as margin if not already set
-                        if (spacesToRemoveAfterAsterisk === undefined && pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
-                            spacesToRemoveAfterAsterisk = pos - lineStartPos;
-                        }
-                    }
-                    else if (spacesToRemoveAfterAsterisk === undefined) {
-                        spacesToRemoveAfterAsterisk = 0;
-                    }
-                    // Analyze text on this line
-                    while (pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
-                        var ch = sourceFile.text.charAt(pos);
-                        if (ch === "@") {
-                            // If it is @param tag
-                            if (isParamTag(pos, end, sourceFile)) {
-                                isInParamTag = true;
-                                pos += paramTag.length;
-                                continue;
-                            }
-                            else {
-                                isInParamTag = false;
-                            }
-                        }
-                        // Add the ch to doc text if we arent in param tag
-                        if (!isInParamTag) {
-                            docCommentTextOfLine += ch;
-                        }
-                        // Scan next character
-                        pos++;
-                    }
-                    // Continue with next line
-                    pos = consumeLineBreaks(pos, end, sourceFile);
-                    if (docCommentTextOfLine) {
-                        pushDocCommentLineText(docComments, docCommentTextOfLine, blankLineCount);
-                        blankLineCount = 0;
-                    }
-                    else if (!isInParamTag && docComments.length) {
-                        // This is blank line when there is text already parsed
-                        blankLineCount++;
-                    }
-                }
-                return docComments;
-            }
-            function getCleanedParamJsDocComment(pos, end, sourceFile) {
-                var paramHelpStringMargin;
-                var paramDocComments = [];
-                while (pos < end) {
-                    if (isParamTag(pos, end, sourceFile)) {
-                        var blankLineCount = 0;
-                        var recordedParamTag = false;
-                        // Consume leading spaces
-                        pos = consumeWhiteSpaces(pos + paramTag.length);
-                        if (pos >= end) {
-                            break;
-                        }
-                        // Ignore type expression
-                        if (sourceFile.text.charCodeAt(pos) === 123 /* openBrace */) {
-                            pos++;
-                            for (var curlies = 1; pos < end; pos++) {
-                                var charCode = sourceFile.text.charCodeAt(pos);
-                                // { character means we need to find another } to match the found one
-                                if (charCode === 123 /* openBrace */) {
-                                    curlies++;
-                                    continue;
-                                }
-                                // } char
-                                if (charCode === 125 /* closeBrace */) {
-                                    curlies--;
-                                    if (curlies === 0) {
-                                        // We do not have any more } to match the type expression is ignored completely
-                                        pos++;
-                                        break;
-                                    }
-                                    else {
-                                        // there are more { to be matched with }
-                                        continue;
-                                    }
-                                }
-                                // Found start of another tag
-                                if (charCode === 64 /* at */) {
-                                    break;
-                                }
-                            }
-                            // Consume white spaces
-                            pos = consumeWhiteSpaces(pos);
-                            if (pos >= end) {
-                                break;
-                            }
-                        }
-                        // Parameter name
-                        if (isName(pos, end, sourceFile, name)) {
-                            // Found the parameter we are looking for consume white spaces
-                            pos = consumeWhiteSpaces(pos + name.length);
-                            if (pos >= end) {
-                                break;
-                            }
-                            var paramHelpString = "";
-                            var firstLineParamHelpStringPos = pos;
-                            while (pos < end) {
-                                var ch = sourceFile.text.charCodeAt(pos);
-                                // at line break, set this comment line text and go to next line
-                                if (ts.isLineBreak(ch)) {
-                                    if (paramHelpString) {
-                                        pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
-                                        paramHelpString = "";
-                                        blankLineCount = 0;
-                                        recordedParamTag = true;
-                                    }
-                                    else if (recordedParamTag) {
-                                        blankLineCount++;
-                                    }
-                                    // Get the pos after cleaning start of the line
-                                    setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos);
-                                    continue;
-                                }
-                                // Done scanning param help string - next tag found
-                                if (ch === 64 /* at */) {
-                                    break;
-                                }
-                                paramHelpString += sourceFile.text.charAt(pos);
-                                // Go to next character
-                                pos++;
-                            }
-                            // If there is param help text, add it top the doc comments
-                            if (paramHelpString) {
-                                pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
-                            }
-                            paramHelpStringMargin = undefined;
-                        }
-                        // If this is the start of another tag, continue with the loop in search of param tag with symbol name
-                        if (sourceFile.text.charCodeAt(pos) === 64 /* at */) {
-                            continue;
-                        }
-                    }
-                    // Next character
-                    pos++;
-                }
-                return paramDocComments;
-                function consumeWhiteSpaces(pos) {
-                    while (pos < end && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
-                        pos++;
-                    }
-                    return pos;
-                }
-                function setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos) {
-                    // Get the pos after consuming line breaks
-                    pos = consumeLineBreaks(pos, end, sourceFile);
-                    if (pos >= end) {
-                        return;
-                    }
-                    if (paramHelpStringMargin === undefined) {
-                        paramHelpStringMargin = sourceFile.getLineAndCharacterOfPosition(firstLineParamHelpStringPos).character;
-                    }
-                    // Now consume white spaces max
-                    var startOfLinePos = pos;
-                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile, paramHelpStringMargin);
-                    if (pos >= end) {
-                        return;
-                    }
-                    var consumedSpaces = pos - startOfLinePos;
-                    if (consumedSpaces < paramHelpStringMargin) {
-                        var ch = sourceFile.text.charCodeAt(pos);
-                        if (ch === 42 /* asterisk */) {
-                            // Consume more spaces after asterisk
-                            pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, paramHelpStringMargin - consumedSpaces - 1);
-                        }
-                    }
-                }
-            }
-        }
-    }
-    var TypeObject = (function () {
-        function TypeObject(checker, flags) {
-            this.checker = checker;
-            this.flags = flags;
-        }
-        TypeObject.prototype.getFlags = function () {
-            return this.flags;
-        };
-        TypeObject.prototype.getSymbol = function () {
-            return this.symbol;
-        };
-        TypeObject.prototype.getProperties = function () {
-            return this.checker.getPropertiesOfType(this);
-        };
-        TypeObject.prototype.getProperty = function (propertyName) {
-            return this.checker.getPropertyOfType(this, propertyName);
-        };
-        TypeObject.prototype.getApparentProperties = function () {
-            return this.checker.getAugmentedPropertiesOfType(this);
-        };
-        TypeObject.prototype.getCallSignatures = function () {
-            return this.checker.getSignaturesOfType(this, 0 /* Call */);
-        };
-        TypeObject.prototype.getConstructSignatures = function () {
-            return this.checker.getSignaturesOfType(this, 1 /* Construct */);
-        };
-        TypeObject.prototype.getStringIndexType = function () {
-            return this.checker.getIndexTypeOfType(this, 0 /* String */);
-        };
-        TypeObject.prototype.getNumberIndexType = function () {
-            return this.checker.getIndexTypeOfType(this, 1 /* Number */);
-        };
-        TypeObject.prototype.getBaseTypes = function () {
-            return this.flags & (1024 /* Class */ | 2048 /* Interface */)
-                ? this.checker.getBaseTypes(this)
-                : undefined;
-        };
-        TypeObject.prototype.getNonNullableType = function () {
-            return this.checker.getNonNullableType(this);
-        };
-        return TypeObject;
-    }());
-    var SignatureObject = (function () {
-        function SignatureObject(checker) {
-            this.checker = checker;
-        }
-        SignatureObject.prototype.getDeclaration = function () {
-            return this.declaration;
-        };
-        SignatureObject.prototype.getTypeParameters = function () {
-            return this.typeParameters;
-        };
-        SignatureObject.prototype.getParameters = function () {
-            return this.parameters;
-        };
-        SignatureObject.prototype.getReturnType = function () {
-            return this.checker.getReturnTypeOfSignature(this);
-        };
-        SignatureObject.prototype.getDocumentationComment = function () {
-            if (this.documentationComment === undefined) {
-                this.documentationComment = this.declaration ? getJsDocCommentsFromDeclarations([this.declaration], 
-                /*name*/ undefined, 
-                /*canUseParsedParamTagComments*/ false) : [];
-            }
-            return this.documentationComment;
-        };
-        return SignatureObject;
-    }());
-    var SourceFileObject = (function (_super) {
-        __extends(SourceFileObject, _super);
-        function SourceFileObject(kind, pos, end) {
-            _super.call(this, kind, pos, end);
-        }
-        SourceFileObject.prototype.update = function (newText, textChangeRange) {
-            return ts.updateSourceFile(this, newText, textChangeRange);
-        };
-        SourceFileObject.prototype.getLineAndCharacterOfPosition = function (position) {
-            return ts.getLineAndCharacterOfPosition(this, position);
-        };
-        SourceFileObject.prototype.getLineStarts = function () {
-            return ts.getLineStarts(this);
-        };
-        SourceFileObject.prototype.getPositionOfLineAndCharacter = function (line, character) {
-            return ts.getPositionOfLineAndCharacter(this, line, character);
-        };
-        SourceFileObject.prototype.getNamedDeclarations = function () {
-            if (!this.namedDeclarations) {
-                this.namedDeclarations = this.computeNamedDeclarations();
-            }
-            return this.namedDeclarations;
-        };
-        SourceFileObject.prototype.computeNamedDeclarations = function () {
-            var result = {};
-            ts.forEachChild(this, visit);
-            return result;
-            function addDeclaration(declaration) {
-                var name = getDeclarationName(declaration);
-                if (name) {
-                    var declarations = getDeclarations(name);
-                    declarations.push(declaration);
-                }
-            }
-            function getDeclarations(name) {
-                return ts.getProperty(result, name) || (result[name] = []);
-            }
-            function getDeclarationName(declaration) {
-                if (declaration.name) {
-                    var result_2 = getTextOfIdentifierOrLiteral(declaration.name);
-                    if (result_2 !== undefined) {
-                        return result_2;
-                    }
-                    if (declaration.name.kind === 140 /* ComputedPropertyName */) {
-                        var expr = declaration.name.expression;
-                        if (expr.kind === 172 /* PropertyAccessExpression */) {
-                            return expr.name.text;
-                        }
-                        return getTextOfIdentifierOrLiteral(expr);
-                    }
-                }
-                return undefined;
-            }
-            function getTextOfIdentifierOrLiteral(node) {
-                if (node) {
-                    if (node.kind === 69 /* Identifier */ ||
-                        node.kind === 9 /* StringLiteral */ ||
-                        node.kind === 8 /* NumericLiteral */) {
-                        return node.text;
-                    }
-                }
-                return undefined;
-            }
-            function visit(node) {
-                switch (node.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        var functionDeclaration = node;
-                        var declarationName = getDeclarationName(functionDeclaration);
-                        if (declarationName) {
-                            var declarations = getDeclarations(declarationName);
-                            var lastDeclaration = ts.lastOrUndefined(declarations);
-                            // Check whether this declaration belongs to an "overload group".
-                            if (lastDeclaration && functionDeclaration.parent === lastDeclaration.parent && functionDeclaration.symbol === lastDeclaration.symbol) {
-                                // Overwrite the last declaration if it was an overload
-                                // and this one is an implementation.
-                                if (functionDeclaration.body && !lastDeclaration.body) {
-                                    declarations[declarations.length - 1] = functionDeclaration;
-                                }
-                            }
-                            else {
-                                declarations.push(functionDeclaration);
-                            }
-                            ts.forEachChild(node, visit);
-                        }
-                        break;
-                    case 221 /* ClassDeclaration */:
-                    case 192 /* ClassExpression */:
-                    case 222 /* InterfaceDeclaration */:
-                    case 223 /* TypeAliasDeclaration */:
-                    case 224 /* EnumDeclaration */:
-                    case 225 /* ModuleDeclaration */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 238 /* ExportSpecifier */:
-                    case 234 /* ImportSpecifier */:
-                    case 229 /* ImportEqualsDeclaration */:
-                    case 231 /* ImportClause */:
-                    case 232 /* NamespaceImport */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 159 /* TypeLiteral */:
-                        addDeclaration(node);
-                        ts.forEachChild(node, visit);
-                        break;
-                    case 142 /* Parameter */:
-                        // Only consider parameter properties
-                        if (!(node.flags & 92 /* ParameterPropertyModifier */)) {
-                            break;
-                        }
-                    // fall through
-                    case 218 /* VariableDeclaration */:
-                    case 169 /* BindingElement */: {
-                        var decl = node;
-                        if (ts.isBindingPattern(decl.name)) {
-                            ts.forEachChild(decl.name, visit);
-                            break;
-                        }
-                        if (decl.initializer)
-                            visit(decl.initializer);
-                    }
-                    case 255 /* EnumMember */:
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                        addDeclaration(node);
-                        break;
-                    case 236 /* ExportDeclaration */:
-                        // Handle named exports case e.g.:
-                        //    export {a, b as B} from "mod";
-                        if (node.exportClause) {
-                            ts.forEach(node.exportClause.elements, visit);
-                        }
-                        break;
-                    case 230 /* ImportDeclaration */:
-                        var importClause = node.importClause;
-                        if (importClause) {
-                            // Handle default import case e.g.:
-                            //    import d from "mod";
-                            if (importClause.name) {
-                                addDeclaration(importClause);
-                            }
-                            // Handle named bindings in imports e.g.:
-                            //    import * as NS from "mod";
-                            //    import {a, b as B} from "mod";
-                            if (importClause.namedBindings) {
-                                if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
-                                    addDeclaration(importClause.namedBindings);
-                                }
-                                else {
-                                    ts.forEach(importClause.namedBindings.elements, visit);
-                                }
-                            }
-                        }
-                        break;
-                    default:
-                        ts.forEachChild(node, visit);
-                }
-            }
-        };
-        return SourceFileObject;
-    }(NodeObject));
-    var TextChange = (function () {
-        function TextChange() {
-        }
-        return TextChange;
-    }());
-    ts.TextChange = TextChange;
-    var HighlightSpanKind;
-    (function (HighlightSpanKind) {
-        HighlightSpanKind.none = "none";
-        HighlightSpanKind.definition = "definition";
-        HighlightSpanKind.reference = "reference";
-        HighlightSpanKind.writtenReference = "writtenReference";
-    })(HighlightSpanKind = ts.HighlightSpanKind || (ts.HighlightSpanKind = {}));
-    (function (IndentStyle) {
-        IndentStyle[IndentStyle["None"] = 0] = "None";
-        IndentStyle[IndentStyle["Block"] = 1] = "Block";
-        IndentStyle[IndentStyle["Smart"] = 2] = "Smart";
-    })(ts.IndentStyle || (ts.IndentStyle = {}));
-    var IndentStyle = ts.IndentStyle;
-    (function (SymbolDisplayPartKind) {
-        SymbolDisplayPartKind[SymbolDisplayPartKind["aliasName"] = 0] = "aliasName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["className"] = 1] = "className";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["enumName"] = 2] = "enumName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["fieldName"] = 3] = "fieldName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["interfaceName"] = 4] = "interfaceName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["keyword"] = 5] = "keyword";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["lineBreak"] = 6] = "lineBreak";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["numericLiteral"] = 7] = "numericLiteral";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["stringLiteral"] = 8] = "stringLiteral";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["localName"] = 9] = "localName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["methodName"] = 10] = "methodName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["moduleName"] = 11] = "moduleName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["operator"] = 12] = "operator";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["parameterName"] = 13] = "parameterName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["propertyName"] = 14] = "propertyName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["punctuation"] = 15] = "punctuation";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["space"] = 16] = "space";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["text"] = 17] = "text";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["typeParameterName"] = 18] = "typeParameterName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["enumMemberName"] = 19] = "enumMemberName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["functionName"] = 20] = "functionName";
-        SymbolDisplayPartKind[SymbolDisplayPartKind["regularExpressionLiteral"] = 21] = "regularExpressionLiteral";
-    })(ts.SymbolDisplayPartKind || (ts.SymbolDisplayPartKind = {}));
-    var SymbolDisplayPartKind = ts.SymbolDisplayPartKind;
-    (function (OutputFileType) {
-        OutputFileType[OutputFileType["JavaScript"] = 0] = "JavaScript";
-        OutputFileType[OutputFileType["SourceMap"] = 1] = "SourceMap";
-        OutputFileType[OutputFileType["Declaration"] = 2] = "Declaration";
-    })(ts.OutputFileType || (ts.OutputFileType = {}));
-    var OutputFileType = ts.OutputFileType;
-    (function (EndOfLineState) {
-        EndOfLineState[EndOfLineState["None"] = 0] = "None";
-        EndOfLineState[EndOfLineState["InMultiLineCommentTrivia"] = 1] = "InMultiLineCommentTrivia";
-        EndOfLineState[EndOfLineState["InSingleQuoteStringLiteral"] = 2] = "InSingleQuoteStringLiteral";
-        EndOfLineState[EndOfLineState["InDoubleQuoteStringLiteral"] = 3] = "InDoubleQuoteStringLiteral";
-        EndOfLineState[EndOfLineState["InTemplateHeadOrNoSubstitutionTemplate"] = 4] = "InTemplateHeadOrNoSubstitutionTemplate";
-        EndOfLineState[EndOfLineState["InTemplateMiddleOrTail"] = 5] = "InTemplateMiddleOrTail";
-        EndOfLineState[EndOfLineState["InTemplateSubstitutionPosition"] = 6] = "InTemplateSubstitutionPosition";
-    })(ts.EndOfLineState || (ts.EndOfLineState = {}));
-    var EndOfLineState = ts.EndOfLineState;
-    (function (TokenClass) {
-        TokenClass[TokenClass["Punctuation"] = 0] = "Punctuation";
-        TokenClass[TokenClass["Keyword"] = 1] = "Keyword";
-        TokenClass[TokenClass["Operator"] = 2] = "Operator";
-        TokenClass[TokenClass["Comment"] = 3] = "Comment";
-        TokenClass[TokenClass["Whitespace"] = 4] = "Whitespace";
-        TokenClass[TokenClass["Identifier"] = 5] = "Identifier";
-        TokenClass[TokenClass["NumberLiteral"] = 6] = "NumberLiteral";
-        TokenClass[TokenClass["StringLiteral"] = 7] = "StringLiteral";
-        TokenClass[TokenClass["RegExpLiteral"] = 8] = "RegExpLiteral";
-    })(ts.TokenClass || (ts.TokenClass = {}));
-    var TokenClass = ts.TokenClass;
-    // TODO: move these to enums
-    var ScriptElementKind;
-    (function (ScriptElementKind) {
-        ScriptElementKind.unknown = "";
-        ScriptElementKind.warning = "warning";
-        /** predefined type (void) or keyword (class) */
-        ScriptElementKind.keyword = "keyword";
-        /** top level script node */
-        ScriptElementKind.scriptElement = "script";
-        /** module foo {} */
-        ScriptElementKind.moduleElement = "module";
-        /** class X {} */
-        ScriptElementKind.classElement = "class";
-        /** var x = class X {} */
-        ScriptElementKind.localClassElement = "local class";
-        /** interface Y {} */
-        ScriptElementKind.interfaceElement = "interface";
-        /** type T = ... */
-        ScriptElementKind.typeElement = "type";
-        /** enum E */
-        ScriptElementKind.enumElement = "enum";
-        /**
-         * Inside module and script only
-         * const v = ..
-         */
-        ScriptElementKind.variableElement = "var";
-        /** Inside function */
-        ScriptElementKind.localVariableElement = "local var";
-        /**
-         * Inside module and script only
-         * function f() { }
-         */
-        ScriptElementKind.functionElement = "function";
-        /** Inside function */
-        ScriptElementKind.localFunctionElement = "local function";
-        /** class X { [public|private]* foo() {} } */
-        ScriptElementKind.memberFunctionElement = "method";
-        /** class X { [public|private]* [get|set] foo:number; } */
-        ScriptElementKind.memberGetAccessorElement = "getter";
-        ScriptElementKind.memberSetAccessorElement = "setter";
-        /**
-         * class X { [public|private]* foo:number; }
-         * interface Y { foo:number; }
-         */
-        ScriptElementKind.memberVariableElement = "property";
-        /** class X { constructor() { } } */
-        ScriptElementKind.constructorImplementationElement = "constructor";
-        /** interface Y { ():number; } */
-        ScriptElementKind.callSignatureElement = "call";
-        /** interface Y { []:number; } */
-        ScriptElementKind.indexSignatureElement = "index";
-        /** interface Y { new():Y; } */
-        ScriptElementKind.constructSignatureElement = "construct";
-        /** function foo(*Y*: string) */
-        ScriptElementKind.parameterElement = "parameter";
-        ScriptElementKind.typeParameterElement = "type parameter";
-        ScriptElementKind.primitiveType = "primitive type";
-        ScriptElementKind.label = "label";
-        ScriptElementKind.alias = "alias";
-        ScriptElementKind.constElement = "const";
-        ScriptElementKind.letElement = "let";
-    })(ScriptElementKind = ts.ScriptElementKind || (ts.ScriptElementKind = {}));
-    var ScriptElementKindModifier;
-    (function (ScriptElementKindModifier) {
-        ScriptElementKindModifier.none = "";
-        ScriptElementKindModifier.publicMemberModifier = "public";
-        ScriptElementKindModifier.privateMemberModifier = "private";
-        ScriptElementKindModifier.protectedMemberModifier = "protected";
-        ScriptElementKindModifier.exportedModifier = "export";
-        ScriptElementKindModifier.ambientModifier = "declare";
-        ScriptElementKindModifier.staticModifier = "static";
-        ScriptElementKindModifier.abstractModifier = "abstract";
-    })(ScriptElementKindModifier = ts.ScriptElementKindModifier || (ts.ScriptElementKindModifier = {}));
-    var ClassificationTypeNames = (function () {
-        function ClassificationTypeNames() {
-        }
-        ClassificationTypeNames.comment = "comment";
-        ClassificationTypeNames.identifier = "identifier";
-        ClassificationTypeNames.keyword = "keyword";
-        ClassificationTypeNames.numericLiteral = "number";
-        ClassificationTypeNames.operator = "operator";
-        ClassificationTypeNames.stringLiteral = "string";
-        ClassificationTypeNames.whiteSpace = "whitespace";
-        ClassificationTypeNames.text = "text";
-        ClassificationTypeNames.punctuation = "punctuation";
-        ClassificationTypeNames.className = "class name";
-        ClassificationTypeNames.enumName = "enum name";
-        ClassificationTypeNames.interfaceName = "interface name";
-        ClassificationTypeNames.moduleName = "module name";
-        ClassificationTypeNames.typeParameterName = "type parameter name";
-        ClassificationTypeNames.typeAliasName = "type alias name";
-        ClassificationTypeNames.parameterName = "parameter name";
-        ClassificationTypeNames.docCommentTagName = "doc comment tag name";
-        ClassificationTypeNames.jsxOpenTagName = "jsx open tag name";
-        ClassificationTypeNames.jsxCloseTagName = "jsx close tag name";
-        ClassificationTypeNames.jsxSelfClosingTagName = "jsx self closing tag name";
-        ClassificationTypeNames.jsxAttribute = "jsx attribute";
-        ClassificationTypeNames.jsxText = "jsx text";
-        ClassificationTypeNames.jsxAttributeStringLiteralValue = "jsx attribute string literal value";
-        return ClassificationTypeNames;
-    }());
-    ts.ClassificationTypeNames = ClassificationTypeNames;
-    (function (ClassificationType) {
-        ClassificationType[ClassificationType["comment"] = 1] = "comment";
-        ClassificationType[ClassificationType["identifier"] = 2] = "identifier";
-        ClassificationType[ClassificationType["keyword"] = 3] = "keyword";
-        ClassificationType[ClassificationType["numericLiteral"] = 4] = "numericLiteral";
-        ClassificationType[ClassificationType["operator"] = 5] = "operator";
-        ClassificationType[ClassificationType["stringLiteral"] = 6] = "stringLiteral";
-        ClassificationType[ClassificationType["regularExpressionLiteral"] = 7] = "regularExpressionLiteral";
-        ClassificationType[ClassificationType["whiteSpace"] = 8] = "whiteSpace";
-        ClassificationType[ClassificationType["text"] = 9] = "text";
-        ClassificationType[ClassificationType["punctuation"] = 10] = "punctuation";
-        ClassificationType[ClassificationType["className"] = 11] = "className";
-        ClassificationType[ClassificationType["enumName"] = 12] = "enumName";
-        ClassificationType[ClassificationType["interfaceName"] = 13] = "interfaceName";
-        ClassificationType[ClassificationType["moduleName"] = 14] = "moduleName";
-        ClassificationType[ClassificationType["typeParameterName"] = 15] = "typeParameterName";
-        ClassificationType[ClassificationType["typeAliasName"] = 16] = "typeAliasName";
-        ClassificationType[ClassificationType["parameterName"] = 17] = "parameterName";
-        ClassificationType[ClassificationType["docCommentTagName"] = 18] = "docCommentTagName";
-        ClassificationType[ClassificationType["jsxOpenTagName"] = 19] = "jsxOpenTagName";
-        ClassificationType[ClassificationType["jsxCloseTagName"] = 20] = "jsxCloseTagName";
-        ClassificationType[ClassificationType["jsxSelfClosingTagName"] = 21] = "jsxSelfClosingTagName";
-        ClassificationType[ClassificationType["jsxAttribute"] = 22] = "jsxAttribute";
-        ClassificationType[ClassificationType["jsxText"] = 23] = "jsxText";
-        ClassificationType[ClassificationType["jsxAttributeStringLiteralValue"] = 24] = "jsxAttributeStringLiteralValue";
-    })(ts.ClassificationType || (ts.ClassificationType = {}));
-    var ClassificationType = ts.ClassificationType;
-    function displayPartsToString(displayParts) {
-        if (displayParts) {
-            return ts.map(displayParts, function (displayPart) { return displayPart.text; }).join("");
-        }
-        return "";
-    }
-    ts.displayPartsToString = displayPartsToString;
-    function isLocalVariableOrFunction(symbol) {
-        if (symbol.parent) {
-            return false; // This is exported symbol
-        }
-        return ts.forEach(symbol.declarations, function (declaration) {
-            // Function expressions are local
-            if (declaration.kind === 179 /* FunctionExpression */) {
-                return true;
-            }
-            if (declaration.kind !== 218 /* VariableDeclaration */ && declaration.kind !== 220 /* FunctionDeclaration */) {
-                return false;
-            }
-            // If the parent is not sourceFile or module block it is local variable
-            for (var parent_15 = declaration.parent; !ts.isFunctionBlock(parent_15); parent_15 = parent_15.parent) {
-                // Reached source file or module block
-                if (parent_15.kind === 256 /* SourceFile */ || parent_15.kind === 226 /* ModuleBlock */) {
-                    return false;
-                }
-            }
-            // parent is in function block
-            return true;
-        });
-    }
-    function getDefaultCompilerOptions() {
-        // Always default to "ScriptTarget.ES5" for the language service
-        return {
-            target: 1 /* ES5 */,
-            jsx: 1 /* Preserve */
-        };
-    }
-    ts.getDefaultCompilerOptions = getDefaultCompilerOptions;
-    // Cache host information about scrip Should be refreshed
-    // at each language service public entry point, since we don't know when
-    // set of scripts handled by the host changes.
-    var HostCache = (function () {
-        function HostCache(host, getCanonicalFileName) {
-            this.host = host;
-            this.getCanonicalFileName = getCanonicalFileName;
-            // script id => script index
-            this.currentDirectory = host.getCurrentDirectory();
-            this.fileNameToEntry = ts.createFileMap();
-            // Initialize the list with the root file names
-            var rootFileNames = host.getScriptFileNames();
-            for (var _i = 0, rootFileNames_1 = rootFileNames; _i < rootFileNames_1.length; _i++) {
-                var fileName = rootFileNames_1[_i];
-                this.createEntry(fileName, ts.toPath(fileName, this.currentDirectory, getCanonicalFileName));
-            }
-            // store the compilation settings
-            this._compilationSettings = host.getCompilationSettings() || getDefaultCompilerOptions();
-        }
-        HostCache.prototype.compilationSettings = function () {
-            return this._compilationSettings;
-        };
-        HostCache.prototype.createEntry = function (fileName, path) {
-            var entry;
-            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
-            if (scriptSnapshot) {
-                entry = {
-                    hostFileName: fileName,
-                    version: this.host.getScriptVersion(fileName),
-                    scriptSnapshot: scriptSnapshot,
-                    scriptKind: ts.getScriptKind(fileName, this.host)
-                };
-            }
-            this.fileNameToEntry.set(path, entry);
-            return entry;
-        };
-        HostCache.prototype.getEntry = function (path) {
-            return this.fileNameToEntry.get(path);
-        };
-        HostCache.prototype.contains = function (path) {
-            return this.fileNameToEntry.contains(path);
-        };
-        HostCache.prototype.getOrCreateEntry = function (fileName) {
-            var path = ts.toPath(fileName, this.currentDirectory, this.getCanonicalFileName);
-            return this.getOrCreateEntryByPath(fileName, path);
-        };
-        HostCache.prototype.getOrCreateEntryByPath = function (fileName, path) {
-            return this.contains(path)
-                ? this.getEntry(path)
-                : this.createEntry(fileName, path);
-        };
-        HostCache.prototype.getRootFileNames = function () {
-            var fileNames = [];
-            this.fileNameToEntry.forEachValue(function (path, value) {
-                if (value) {
-                    fileNames.push(value.hostFileName);
-                }
-            });
-            return fileNames;
-        };
-        HostCache.prototype.getVersion = function (path) {
-            var file = this.getEntry(path);
-            return file && file.version;
-        };
-        HostCache.prototype.getScriptSnapshot = function (path) {
-            var file = this.getEntry(path);
-            return file && file.scriptSnapshot;
-        };
-        return HostCache;
-    }());
-    var SyntaxTreeCache = (function () {
-        function SyntaxTreeCache(host) {
-            this.host = host;
-        }
-        SyntaxTreeCache.prototype.getCurrentSourceFile = function (fileName) {
-            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
-            if (!scriptSnapshot) {
-                // The host does not know about this file.
-                throw new Error("Could not find file: '" + fileName + "'.");
-            }
-            var scriptKind = ts.getScriptKind(fileName, this.host);
-            var version = this.host.getScriptVersion(fileName);
-            var sourceFile;
-            if (this.currentFileName !== fileName) {
-                // This is a new file, just parse it
-                sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, 2 /* Latest */, version, /*setNodeParents*/ true, scriptKind);
-            }
-            else if (this.currentFileVersion !== version) {
-                // This is the same file, just a newer version. Incrementally parse the file.
-                var editRange = scriptSnapshot.getChangeRange(this.currentFileScriptSnapshot);
-                sourceFile = updateLanguageServiceSourceFile(this.currentSourceFile, scriptSnapshot, version, editRange);
-            }
-            if (sourceFile) {
-                // All done, ensure state is up to date
-                this.currentFileVersion = version;
-                this.currentFileName = fileName;
-                this.currentFileScriptSnapshot = scriptSnapshot;
-                this.currentSourceFile = sourceFile;
-            }
-            return this.currentSourceFile;
-        };
-        return SyntaxTreeCache;
-    }());
-    function setSourceFileFields(sourceFile, scriptSnapshot, version) {
-        sourceFile.version = version;
-        sourceFile.scriptSnapshot = scriptSnapshot;
-    }
-    /*
-     * This function will compile source text from 'input' argument using specified compiler options.
-     * If not options are provided - it will use a set of default compiler options.
-     * Extra compiler options that will unconditionally be used by this function are:
-     * - isolatedModules = true
-     * - allowNonTsExtensions = true
-     * - noLib = true
-     * - noResolve = true
-     */
-    function transpileModule(input, transpileOptions) {
-        var options = transpileOptions.compilerOptions ? ts.clone(transpileOptions.compilerOptions) : getDefaultCompilerOptions();
-        options.isolatedModules = true;
-        // transpileModule does not write anything to disk so there is no need to verify that there are no conflicts between input and output paths.
-        options.suppressOutputPathCheck = true;
-        // Filename can be non-ts file.
-        options.allowNonTsExtensions = true;
-        // We are not returning a sourceFile for lib file when asked by the program,
-        // so pass --noLib to avoid reporting a file not found error.
-        options.noLib = true;
-        // We are not doing a full typecheck, we are not resolving the whole context,
-        // so pass --noResolve to avoid reporting missing file errors.
-        options.noResolve = true;
-        // if jsx is specified then treat file as .tsx
-        var inputFileName = transpileOptions.fileName || (options.jsx ? "module.tsx" : "module.ts");
-        var sourceFile = ts.createSourceFile(inputFileName, input, options.target);
-        if (transpileOptions.moduleName) {
-            sourceFile.moduleName = transpileOptions.moduleName;
-        }
-        sourceFile.renamedDependencies = transpileOptions.renamedDependencies;
-        var newLine = ts.getNewLineCharacter(options);
-        // Output
-        var outputText;
-        var sourceMapText;
-        // Create a compilerHost object to allow the compiler to read and write files
-        var compilerHost = {
-            getSourceFile: function (fileName, target) { return fileName === ts.normalizePath(inputFileName) ? sourceFile : undefined; },
-            writeFile: function (name, text, writeByteOrderMark) {
-                if (ts.fileExtensionIs(name, ".map")) {
-                    ts.Debug.assert(sourceMapText === undefined, "Unexpected multiple source map outputs for the file '" + name + "'");
-                    sourceMapText = text;
-                }
-                else {
-                    ts.Debug.assert(outputText === undefined, "Unexpected multiple outputs for the file: '" + name + "'");
-                    outputText = text;
-                }
-            },
-            getDefaultLibFileName: function () { return "lib.d.ts"; },
-            useCaseSensitiveFileNames: function () { return false; },
-            getCanonicalFileName: function (fileName) { return fileName; },
-            getCurrentDirectory: function () { return ""; },
-            getNewLine: function () { return newLine; },
-            fileExists: function (fileName) { return fileName === inputFileName; },
-            readFile: function (fileName) { return ""; },
-            directoryExists: function (directoryExists) { return true; }
-        };
-        var program = ts.createProgram([inputFileName], options, compilerHost);
-        var diagnostics;
-        if (transpileOptions.reportDiagnostics) {
-            diagnostics = [];
-            ts.addRange(/*to*/ diagnostics, /*from*/ program.getSyntacticDiagnostics(sourceFile));
-            ts.addRange(/*to*/ diagnostics, /*from*/ program.getOptionsDiagnostics());
-        }
-        // Emit
-        program.emit();
-        ts.Debug.assert(outputText !== undefined, "Output generation failed");
-        return { outputText: outputText, diagnostics: diagnostics, sourceMapText: sourceMapText };
-    }
-    ts.transpileModule = transpileModule;
-    /*
-     * This is a shortcut function for transpileModule - it accepts transpileOptions as parameters and returns only outputText part of the result.
-     */
-    function transpile(input, compilerOptions, fileName, diagnostics, moduleName) {
-        var output = transpileModule(input, { compilerOptions: compilerOptions, fileName: fileName, reportDiagnostics: !!diagnostics, moduleName: moduleName });
-        // addRange correctly handles cases when wither 'from' or 'to' argument is missing
-        ts.addRange(diagnostics, output.diagnostics);
-        return output.outputText;
-    }
-    ts.transpile = transpile;
-    function createLanguageServiceSourceFile(fileName, scriptSnapshot, scriptTarget, version, setNodeParents, scriptKind) {
-        var text = scriptSnapshot.getText(0, scriptSnapshot.getLength());
-        var sourceFile = ts.createSourceFile(fileName, text, scriptTarget, setNodeParents, scriptKind);
-        setSourceFileFields(sourceFile, scriptSnapshot, version);
-        return sourceFile;
-    }
-    ts.createLanguageServiceSourceFile = createLanguageServiceSourceFile;
-    ts.disableIncrementalParsing = false;
-    function updateLanguageServiceSourceFile(sourceFile, scriptSnapshot, version, textChangeRange, aggressiveChecks) {
-        // If we were given a text change range, and our version or open-ness changed, then
-        // incrementally parse this file.
-        if (textChangeRange) {
-            if (version !== sourceFile.version) {
-                // Once incremental parsing is ready, then just call into this function.
-                if (!ts.disableIncrementalParsing) {
-                    var newText = void 0;
-                    // grab the fragment from the beginning of the original text to the beginning of the span
-                    var prefix = textChangeRange.span.start !== 0
-                        ? sourceFile.text.substr(0, textChangeRange.span.start)
-                        : "";
-                    // grab the fragment from the end of the span till the end of the original text
-                    var suffix = ts.textSpanEnd(textChangeRange.span) !== sourceFile.text.length
-                        ? sourceFile.text.substr(ts.textSpanEnd(textChangeRange.span))
-                        : "";
-                    if (textChangeRange.newLength === 0) {
-                        // edit was a deletion - just combine prefix and suffix
-                        newText = prefix && suffix ? prefix + suffix : prefix || suffix;
-                    }
-                    else {
-                        // it was actual edit, fetch the fragment of new text that correspond to new span
-                        var changedText = scriptSnapshot.getText(textChangeRange.span.start, textChangeRange.span.start + textChangeRange.newLength);
-                        // combine prefix, changed text and suffix
-                        newText = prefix && suffix
-                            ? prefix + changedText + suffix
-                            : prefix
-                                ? (prefix + changedText)
-                                : (changedText + suffix);
-                    }
-                    var newSourceFile = ts.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
-                    setSourceFileFields(newSourceFile, scriptSnapshot, version);
-                    // after incremental parsing nameTable might not be up-to-date
-                    // drop it so it can be lazily recreated later
-                    newSourceFile.nameTable = undefined;
-                    // dispose all resources held by old script snapshot
-                    if (sourceFile !== newSourceFile && sourceFile.scriptSnapshot) {
-                        if (sourceFile.scriptSnapshot.dispose) {
-                            sourceFile.scriptSnapshot.dispose();
-                        }
-                        sourceFile.scriptSnapshot = undefined;
-                    }
-                    return newSourceFile;
-                }
-            }
-        }
-        // Otherwise, just create a new source file.
-        return createLanguageServiceSourceFile(sourceFile.fileName, scriptSnapshot, sourceFile.languageVersion, version, /*setNodeParents*/ true, sourceFile.scriptKind);
-    }
-    ts.updateLanguageServiceSourceFile = updateLanguageServiceSourceFile;
-    function createDocumentRegistry(useCaseSensitiveFileNames, currentDirectory) {
-        if (currentDirectory === void 0) { currentDirectory = ""; }
-        // Maps from compiler setting target (ES3, ES5, etc.) to all the cached documents we have
-        // for those settings.
-        var buckets = {};
-        var getCanonicalFileName = ts.createGetCanonicalFileName(!!useCaseSensitiveFileNames);
-        function getKeyForCompilationSettings(settings) {
-            return ("_" + settings.target + "|" + settings.module + "|" + settings.noResolve + "|" + settings.jsx + "|" + settings.allowJs + "|" + settings.baseUrl + "|" + settings.typesRoot + "|" + settings.typesSearchPaths + "|" + JSON.stringify(settings.rootDirs) + "|" + JSON.stringify(settings.paths));
-        }
-        function getBucketForCompilationSettings(key, createIfMissing) {
-            var bucket = ts.lookUp(buckets, key);
-            if (!bucket && createIfMissing) {
-                buckets[key] = bucket = ts.createFileMap();
-            }
-            return bucket;
-        }
-        function reportStats() {
-            var bucketInfoArray = Object.keys(buckets).filter(function (name) { return name && name.charAt(0) === "_"; }).map(function (name) {
-                var entries = ts.lookUp(buckets, name);
-                var sourceFiles = [];
-                entries.forEachValue(function (key, entry) {
-                    sourceFiles.push({
-                        name: key,
-                        refCount: entry.languageServiceRefCount,
-                        references: entry.owners.slice(0)
-                    });
-                });
-                sourceFiles.sort(function (x, y) { return y.refCount - x.refCount; });
-                return {
-                    bucket: name,
-                    sourceFiles: sourceFiles
-                };
-            });
-            return JSON.stringify(bucketInfoArray, undefined, 2);
-        }
-        function acquireDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
-        }
-        function acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
-            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ true, scriptKind);
-        }
-        function updateDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
-        }
-        function updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
-            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ false, scriptKind);
-        }
-        function acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, acquiring, scriptKind) {
-            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ true);
-            var entry = bucket.get(path);
-            if (!entry) {
-                ts.Debug.assert(acquiring, "How could we be trying to update a document that the registry doesn't have?");
-                // Have never seen this file with these settings.  Create a new source file for it.
-                var sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, compilationSettings.target, version, /*setNodeParents*/ false, scriptKind);
-                entry = {
-                    sourceFile: sourceFile,
-                    languageServiceRefCount: 0,
-                    owners: []
-                };
-                bucket.set(path, entry);
-            }
-            else {
-                // We have an entry for this file.  However, it may be for a different version of
-                // the script snapshot.  If so, update it appropriately.  Otherwise, we can just
-                // return it as is.
-                if (entry.sourceFile.version !== version) {
-                    entry.sourceFile = updateLanguageServiceSourceFile(entry.sourceFile, scriptSnapshot, version, scriptSnapshot.getChangeRange(entry.sourceFile.scriptSnapshot));
-                }
-            }
-            // If we're acquiring, then this is the first time this LS is asking for this document.
-            // Increase our ref count so we know there's another LS using the document.  If we're
-            // not acquiring, then that means the LS is 'updating' the file instead, and that means
-            // it has already acquired the document previously.  As such, we do not need to increase
-            // the ref count.
-            if (acquiring) {
-                entry.languageServiceRefCount++;
-            }
-            return entry.sourceFile;
-        }
-        function releaseDocument(fileName, compilationSettings) {
-            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
-            var key = getKeyForCompilationSettings(compilationSettings);
-            return releaseDocumentWithKey(path, key);
-        }
-        function releaseDocumentWithKey(path, key) {
-            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ false);
-            ts.Debug.assert(bucket !== undefined);
-            var entry = bucket.get(path);
-            entry.languageServiceRefCount--;
-            ts.Debug.assert(entry.languageServiceRefCount >= 0);
-            if (entry.languageServiceRefCount === 0) {
-                bucket.remove(path);
-            }
-        }
-        return {
-            acquireDocument: acquireDocument,
-            acquireDocumentWithKey: acquireDocumentWithKey,
-            updateDocument: updateDocument,
-            updateDocumentWithKey: updateDocumentWithKey,
-            releaseDocument: releaseDocument,
-            releaseDocumentWithKey: releaseDocumentWithKey,
-            reportStats: reportStats,
-            getKeyForCompilationSettings: getKeyForCompilationSettings
-        };
-    }
-    ts.createDocumentRegistry = createDocumentRegistry;
-    function preProcessFile(sourceText, readImportFiles, detectJavaScriptImports) {
-        if (readImportFiles === void 0) { readImportFiles = true; }
-        if (detectJavaScriptImports === void 0) { detectJavaScriptImports = false; }
-        var referencedFiles = [];
-        var typeReferenceDirectives = [];
-        var importedFiles = [];
-        var ambientExternalModules;
-        var isNoDefaultLib = false;
-        var braceNesting = 0;
-        // assume that text represent an external module if it contains at least one top level import/export
-        // ambient modules that are found inside external modules are interpreted as module augmentations
-        var externalModule = false;
-        function nextToken() {
-            var token = scanner.scan();
-            if (token === 15 /* OpenBraceToken */) {
-                braceNesting++;
-            }
-            else if (token === 16 /* CloseBraceToken */) {
-                braceNesting--;
-            }
-            return token;
-        }
-        function processTripleSlashDirectives() {
-            var commentRanges = ts.getLeadingCommentRanges(sourceText, 0);
-            ts.forEach(commentRanges, function (commentRange) {
-                var comment = sourceText.substring(commentRange.pos, commentRange.end);
-                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, commentRange);
-                if (referencePathMatchResult) {
-                    isNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
-                    var fileReference = referencePathMatchResult.fileReference;
-                    if (fileReference) {
-                        var collection = referencePathMatchResult.isTypeReferenceDirective
-                            ? typeReferenceDirectives
-                            : referencedFiles;
-                        collection.push(fileReference);
-                    }
-                }
-            });
-        }
-        function getFileReference() {
-            var file = scanner.getTokenValue();
-            var pos = scanner.getTokenPos();
-            return {
-                fileName: file,
-                pos: pos,
-                end: pos + file.length
-            };
-        }
-        function recordAmbientExternalModule() {
-            if (!ambientExternalModules) {
-                ambientExternalModules = [];
-            }
-            ambientExternalModules.push({ ref: getFileReference(), depth: braceNesting });
-        }
-        function recordModuleName() {
-            importedFiles.push(getFileReference());
-            markAsExternalModuleIfTopLevel();
-        }
-        function markAsExternalModuleIfTopLevel() {
-            if (braceNesting === 0) {
-                externalModule = true;
-            }
-        }
-        /**
-         * Returns true if at least one token was consumed from the stream
-         */
-        function tryConsumeDeclare() {
-            var token = scanner.getToken();
-            if (token === 122 /* DeclareKeyword */) {
-                // declare module "mod"
-                token = nextToken();
-                if (token === 125 /* ModuleKeyword */) {
-                    token = nextToken();
-                    if (token === 9 /* StringLiteral */) {
-                        recordAmbientExternalModule();
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        /**
-         * Returns true if at least one token was consumed from the stream
-         */
-        function tryConsumeImport() {
-            var token = scanner.getToken();
-            if (token === 89 /* ImportKeyword */) {
-                token = nextToken();
-                if (token === 9 /* StringLiteral */) {
-                    // import "mod";
-                    recordModuleName();
-                    return true;
-                }
-                else {
-                    if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
-                        token = nextToken();
-                        if (token === 136 /* FromKeyword */) {
-                            token = nextToken();
-                            if (token === 9 /* StringLiteral */) {
-                                // import d from "mod";
-                                recordModuleName();
-                                return true;
-                            }
-                        }
-                        else if (token === 56 /* EqualsToken */) {
-                            if (tryConsumeRequireCall(/*skipCurrentToken*/ true)) {
-                                return true;
-                            }
-                        }
-                        else if (token === 24 /* CommaToken */) {
-                            // consume comma and keep going
-                            token = nextToken();
-                        }
-                        else {
-                            // unknown syntax
-                            return true;
-                        }
-                    }
-                    if (token === 15 /* OpenBraceToken */) {
-                        token = nextToken();
-                        // consume "{ a as B, c, d as D}" clauses
-                        // make sure that it stops on EOF
-                        while (token !== 16 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
-                            token = nextToken();
-                        }
-                        if (token === 16 /* CloseBraceToken */) {
-                            token = nextToken();
-                            if (token === 136 /* FromKeyword */) {
-                                token = nextToken();
-                                if (token === 9 /* StringLiteral */) {
-                                    // import {a as A} from "mod";
-                                    // import d, {a, b as B} from "mod"
-                                    recordModuleName();
-                                }
-                            }
-                        }
-                    }
-                    else if (token === 37 /* AsteriskToken */) {
-                        token = nextToken();
-                        if (token === 116 /* AsKeyword */) {
-                            token = nextToken();
-                            if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
-                                token = nextToken();
-                                if (token === 136 /* FromKeyword */) {
-                                    token = nextToken();
-                                    if (token === 9 /* StringLiteral */) {
-                                        // import * as NS from "mod"
-                                        // import d, * as NS from "mod"
-                                        recordModuleName();
-                                    }
-                                }
-                            }
-                        }
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeExport() {
-            var token = scanner.getToken();
-            if (token === 82 /* ExportKeyword */) {
-                markAsExternalModuleIfTopLevel();
-                token = nextToken();
-                if (token === 15 /* OpenBraceToken */) {
-                    token = nextToken();
-                    // consume "{ a as B, c, d as D}" clauses
-                    // make sure it stops on EOF
-                    while (token !== 16 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
-                        token = nextToken();
-                    }
-                    if (token === 16 /* CloseBraceToken */) {
-                        token = nextToken();
-                        if (token === 136 /* FromKeyword */) {
-                            token = nextToken();
-                            if (token === 9 /* StringLiteral */) {
-                                // export {a as A} from "mod";
-                                // export {a, b as B} from "mod"
-                                recordModuleName();
-                            }
-                        }
-                    }
-                }
-                else if (token === 37 /* AsteriskToken */) {
-                    token = nextToken();
-                    if (token === 136 /* FromKeyword */) {
-                        token = nextToken();
-                        if (token === 9 /* StringLiteral */) {
-                            // export * from "mod"
-                            recordModuleName();
-                        }
-                    }
-                }
-                else if (token === 89 /* ImportKeyword */) {
-                    token = nextToken();
-                    if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
-                        token = nextToken();
-                        if (token === 56 /* EqualsToken */) {
-                            if (tryConsumeRequireCall(/*skipCurrentToken*/ true)) {
-                                return true;
-                            }
-                        }
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeRequireCall(skipCurrentToken) {
-            var token = skipCurrentToken ? nextToken() : scanner.getToken();
-            if (token === 129 /* RequireKeyword */) {
-                token = nextToken();
-                if (token === 17 /* OpenParenToken */) {
-                    token = nextToken();
-                    if (token === 9 /* StringLiteral */) {
-                        //  require("mod");
-                        recordModuleName();
-                    }
-                }
-                return true;
-            }
-            return false;
-        }
-        function tryConsumeDefine() {
-            var token = scanner.getToken();
-            if (token === 69 /* Identifier */ && scanner.getTokenValue() === "define") {
-                token = nextToken();
-                if (token !== 17 /* OpenParenToken */) {
-                    return true;
-                }
-                token = nextToken();
-                if (token === 9 /* StringLiteral */) {
-                    // looks like define ("modname", ... - skip string literal and comma
-                    token = nextToken();
-                    if (token === 24 /* CommaToken */) {
-                        token = nextToken();
-                    }
-                    else {
-                        // unexpected token
-                        return true;
-                    }
-                }
-                // should be start of dependency list
-                if (token !== 19 /* OpenBracketToken */) {
-                    return true;
-                }
-                // skip open bracket
-                token = nextToken();
-                var i = 0;
-                // scan until ']' or EOF
-                while (token !== 20 /* CloseBracketToken */ && token !== 1 /* EndOfFileToken */) {
-                    // record string literals as module names
-                    if (token === 9 /* StringLiteral */) {
-                        recordModuleName();
-                        i++;
-                    }
-                    token = nextToken();
-                }
-                return true;
-            }
-            return false;
-        }
-        function processImports() {
-            scanner.setText(sourceText);
-            nextToken();
-            // Look for:
-            //    import "mod";
-            //    import d from "mod"
-            //    import {a as A } from "mod";
-            //    import * as NS  from "mod"
-            //    import d, {a, b as B} from "mod"
-            //    import i = require("mod");
-            //
-            //    export * from "mod"
-            //    export {a as b} from "mod"
-            //    export import i = require("mod")
-            //    (for JavaScript files) require("mod")
-            while (true) {
-                if (scanner.getToken() === 1 /* EndOfFileToken */) {
-                    break;
-                }
-                // check if at least one of alternative have moved scanner forward
-                if (tryConsumeDeclare() ||
-                    tryConsumeImport() ||
-                    tryConsumeExport() ||
-                    (detectJavaScriptImports && (tryConsumeRequireCall(/*skipCurrentToken*/ false) || tryConsumeDefine()))) {
-                    continue;
-                }
-                else {
-                    nextToken();
-                }
-            }
-            scanner.setText(undefined);
-        }
-        if (readImportFiles) {
-            processImports();
-        }
-        processTripleSlashDirectives();
-        if (externalModule) {
-            // for external modules module all nested ambient modules are augmentations
-            if (ambientExternalModules) {
-                // move all detected ambient modules to imported files since they need to be resolved
-                for (var _i = 0, ambientExternalModules_1 = ambientExternalModules; _i < ambientExternalModules_1.length; _i++) {
-                    var decl = ambientExternalModules_1[_i];
-                    importedFiles.push(decl.ref);
-                }
-            }
-            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: undefined };
-        }
-        else {
-            // for global scripts ambient modules still can have augmentations - look for ambient modules with depth > 0
-            var ambientModuleNames = void 0;
-            if (ambientExternalModules) {
-                for (var _a = 0, ambientExternalModules_2 = ambientExternalModules; _a < ambientExternalModules_2.length; _a++) {
-                    var decl = ambientExternalModules_2[_a];
-                    if (decl.depth === 0) {
-                        if (!ambientModuleNames) {
-                            ambientModuleNames = [];
-                        }
-                        ambientModuleNames.push(decl.ref.fileName);
-                    }
-                    else {
-                        importedFiles.push(decl.ref);
-                    }
-                }
-            }
-            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: ambientModuleNames };
-        }
-    }
-    ts.preProcessFile = preProcessFile;
-    /// Helpers
-    function getTargetLabel(referenceNode, labelName) {
-        while (referenceNode) {
-            if (referenceNode.kind === 214 /* LabeledStatement */ && referenceNode.label.text === labelName) {
-                return referenceNode.label;
-            }
-            referenceNode = referenceNode.parent;
-        }
-        return undefined;
-    }
-    function isJumpStatementTarget(node) {
-        return node.kind === 69 /* Identifier */ &&
-            (node.parent.kind === 210 /* BreakStatement */ || node.parent.kind === 209 /* ContinueStatement */) &&
-            node.parent.label === node;
-    }
-    function isLabelOfLabeledStatement(node) {
-        return node.kind === 69 /* Identifier */ &&
-            node.parent.kind === 214 /* LabeledStatement */ &&
-            node.parent.label === node;
-    }
-    /**
-     * Whether or not a 'node' is preceded by a label of the given string.
-     * Note: 'node' cannot be a SourceFile.
-     */
-    function isLabeledBy(node, labelName) {
-        for (var owner = node.parent; owner.kind === 214 /* LabeledStatement */; owner = owner.parent) {
-            if (owner.label.text === labelName) {
-                return true;
-            }
-        }
-        return false;
-    }
-    function isLabelName(node) {
-        return isLabelOfLabeledStatement(node) || isJumpStatementTarget(node);
-    }
-    function isRightSideOfQualifiedName(node) {
-        return node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node;
-    }
-    function isRightSideOfPropertyAccess(node) {
-        return node && node.parent && node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node;
-    }
-    function isCallExpressionTarget(node) {
-        if (isRightSideOfPropertyAccess(node)) {
-            node = node.parent;
-        }
-        return node && node.parent && node.parent.kind === 174 /* CallExpression */ && node.parent.expression === node;
-    }
-    function isNewExpressionTarget(node) {
-        if (isRightSideOfPropertyAccess(node)) {
-            node = node.parent;
-        }
-        return node && node.parent && node.parent.kind === 175 /* NewExpression */ && node.parent.expression === node;
-    }
-    function isNameOfModuleDeclaration(node) {
-        return node.parent.kind === 225 /* ModuleDeclaration */ && node.parent.name === node;
-    }
-    function isNameOfFunctionDeclaration(node) {
-        return node.kind === 69 /* Identifier */ &&
-            ts.isFunctionLike(node.parent) && node.parent.name === node;
-    }
-    function isObjectLiteralPropertyDeclaration(node) {
-        switch (node.kind) {
-            case 253 /* PropertyAssignment */:
-            case 254 /* ShorthandPropertyAssignment */:
-            case 147 /* MethodDeclaration */:
-            case 149 /* GetAccessor */:
-            case 150 /* SetAccessor */:
-                return true;
-        }
-        return false;
-    }
-    /**
-     * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
-     */
-    function getContainingObjectLiteralElement(node) {
-        switch (node.kind) {
-            case 9 /* StringLiteral */:
-            case 8 /* NumericLiteral */:
-                if (node.parent.kind === 140 /* ComputedPropertyName */) {
-                    return isObjectLiteralPropertyDeclaration(node.parent.parent) ? node.parent.parent : undefined;
-                }
-            // intential fall through
-            case 69 /* Identifier */:
-                return isObjectLiteralPropertyDeclaration(node.parent) && node.parent.name === node ? node.parent : undefined;
-        }
-        return undefined;
-    }
-    function isLiteralNameOfPropertyDeclarationOrIndexAccess(node) {
-        if (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) {
-            switch (node.parent.kind) {
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 253 /* PropertyAssignment */:
-                case 255 /* EnumMember */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 225 /* ModuleDeclaration */:
-                    return node.parent.name === node;
-                case 173 /* ElementAccessExpression */:
-                    return node.parent.argumentExpression === node;
-                case 140 /* ComputedPropertyName */:
-                    return true;
-            }
-        }
-        return false;
-    }
-    function isNameOfExternalModuleImportOrDeclaration(node) {
-        if (node.kind === 9 /* StringLiteral */) {
-            return isNameOfModuleDeclaration(node) ||
-                (ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) && ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node);
-        }
-        return false;
-    }
-    /** Returns true if the position is within a comment */
-    function isInsideComment(sourceFile, token, position) {
-        // The position has to be: 1. in the leading trivia (before token.getStart()), and 2. within a comment
-        return position <= token.getStart(sourceFile) &&
-            (isInsideCommentRange(ts.getTrailingCommentRanges(sourceFile.text, token.getFullStart())) ||
-                isInsideCommentRange(ts.getLeadingCommentRanges(sourceFile.text, token.getFullStart())));
-        function isInsideCommentRange(comments) {
-            return ts.forEach(comments, function (comment) {
-                // either we are 1. completely inside the comment, or 2. at the end of the comment
-                if (comment.pos < position && position < comment.end) {
-                    return true;
-                }
-                else if (position === comment.end) {
-                    var text = sourceFile.text;
-                    var width = comment.end - comment.pos;
-                    // is single line comment or just /*
-                    if (width <= 2 || text.charCodeAt(comment.pos + 1) === 47 /* slash */) {
-                        return true;
-                    }
-                    else {
-                        // is unterminated multi-line comment
-                        return !(text.charCodeAt(comment.end - 1) === 47 /* slash */ &&
-                            text.charCodeAt(comment.end - 2) === 42 /* asterisk */);
-                    }
-                }
-                return false;
-            });
-        }
-    }
-    var SemanticMeaning;
-    (function (SemanticMeaning) {
-        SemanticMeaning[SemanticMeaning["None"] = 0] = "None";
-        SemanticMeaning[SemanticMeaning["Value"] = 1] = "Value";
-        SemanticMeaning[SemanticMeaning["Type"] = 2] = "Type";
-        SemanticMeaning[SemanticMeaning["Namespace"] = 4] = "Namespace";
-        SemanticMeaning[SemanticMeaning["All"] = 7] = "All";
-    })(SemanticMeaning || (SemanticMeaning = {}));
-    var BreakContinueSearchType;
-    (function (BreakContinueSearchType) {
-        BreakContinueSearchType[BreakContinueSearchType["None"] = 0] = "None";
-        BreakContinueSearchType[BreakContinueSearchType["Unlabeled"] = 1] = "Unlabeled";
-        BreakContinueSearchType[BreakContinueSearchType["Labeled"] = 2] = "Labeled";
-        BreakContinueSearchType[BreakContinueSearchType["All"] = 3] = "All";
-    })(BreakContinueSearchType || (BreakContinueSearchType = {}));
-    // A cache of completion entries for keywords, these do not change between sessions
-    var keywordCompletions = [];
-    for (var i = 70 /* FirstKeyword */; i <= 138 /* LastKeyword */; i++) {
-        keywordCompletions.push({
-            name: ts.tokenToString(i),
-            kind: ScriptElementKind.keyword,
-            kindModifiers: ScriptElementKindModifier.none,
-            sortText: "0"
-        });
-    }
-    /* @internal */ function getContainerNode(node) {
-        while (true) {
-            node = node.parent;
-            if (!node) {
-                return undefined;
-            }
-            switch (node.kind) {
-                case 256 /* SourceFile */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 224 /* EnumDeclaration */:
-                case 225 /* ModuleDeclaration */:
-                    return node;
-            }
-        }
-    }
-    ts.getContainerNode = getContainerNode;
-    /* @internal */ function getNodeKind(node) {
-        switch (node.kind) {
-            case 225 /* ModuleDeclaration */: return ScriptElementKind.moduleElement;
-            case 221 /* ClassDeclaration */:
-            case 192 /* ClassExpression */:
-                return ScriptElementKind.classElement;
-            case 222 /* InterfaceDeclaration */: return ScriptElementKind.interfaceElement;
-            case 223 /* TypeAliasDeclaration */: return ScriptElementKind.typeElement;
-            case 224 /* EnumDeclaration */: return ScriptElementKind.enumElement;
-            case 218 /* VariableDeclaration */:
-                return ts.isConst(node)
-                    ? ScriptElementKind.constElement
-                    : ts.isLet(node)
-                        ? ScriptElementKind.letElement
-                        : ScriptElementKind.variableElement;
-            case 220 /* FunctionDeclaration */:
-            case 179 /* FunctionExpression */:
-                return ScriptElementKind.functionElement;
-            case 149 /* GetAccessor */: return ScriptElementKind.memberGetAccessorElement;
-            case 150 /* SetAccessor */: return ScriptElementKind.memberSetAccessorElement;
-            case 147 /* MethodDeclaration */:
-            case 146 /* MethodSignature */:
-                return ScriptElementKind.memberFunctionElement;
-            case 145 /* PropertyDeclaration */:
-            case 144 /* PropertySignature */:
-                return ScriptElementKind.memberVariableElement;
-            case 153 /* IndexSignature */: return ScriptElementKind.indexSignatureElement;
-            case 152 /* ConstructSignature */: return ScriptElementKind.constructSignatureElement;
-            case 151 /* CallSignature */: return ScriptElementKind.callSignatureElement;
-            case 148 /* Constructor */: return ScriptElementKind.constructorImplementationElement;
-            case 141 /* TypeParameter */: return ScriptElementKind.typeParameterElement;
-            case 255 /* EnumMember */: return ScriptElementKind.variableElement;
-            case 142 /* Parameter */: return (node.flags & 92 /* ParameterPropertyModifier */) ? ScriptElementKind.memberVariableElement : ScriptElementKind.parameterElement;
-            case 229 /* ImportEqualsDeclaration */:
-            case 234 /* ImportSpecifier */:
-            case 231 /* ImportClause */:
-            case 238 /* ExportSpecifier */:
-            case 232 /* NamespaceImport */:
-                return ScriptElementKind.alias;
-        }
-        return ScriptElementKind.unknown;
-    }
-    ts.getNodeKind = getNodeKind;
-    var CancellationTokenObject = (function () {
-        function CancellationTokenObject(cancellationToken) {
-            this.cancellationToken = cancellationToken;
-        }
-        CancellationTokenObject.prototype.isCancellationRequested = function () {
-            return this.cancellationToken && this.cancellationToken.isCancellationRequested();
-        };
-        CancellationTokenObject.prototype.throwIfCancellationRequested = function () {
-            if (this.isCancellationRequested()) {
-                throw new ts.OperationCanceledException();
-            }
-        };
-        return CancellationTokenObject;
-    }());
-    function createLanguageService(host, documentRegistry) {
-        if (documentRegistry === void 0) { documentRegistry = createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory()); }
-        var syntaxTreeCache = new SyntaxTreeCache(host);
-        var ruleProvider;
-        var program;
-        var lastProjectVersion;
-        var useCaseSensitivefileNames = false;
-        var cancellationToken = new CancellationTokenObject(host.getCancellationToken && host.getCancellationToken());
-        var currentDirectory = host.getCurrentDirectory();
-        // Check if the localized messages json is set, otherwise query the host for it
-        if (!ts.localizedDiagnosticMessages && host.getLocalizedDiagnosticMessages) {
-            ts.localizedDiagnosticMessages = host.getLocalizedDiagnosticMessages();
-        }
-        function log(message) {
-            if (host.log) {
-                host.log(message);
-            }
-        }
-        var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitivefileNames);
-        function getValidSourceFile(fileName) {
-            var sourceFile = program.getSourceFile(fileName);
-            if (!sourceFile) {
-                throw new Error("Could not find file: '" + fileName + "'.");
-            }
-            return sourceFile;
-        }
-        function getRuleProvider(options) {
-            // Ensure rules are initialized and up to date wrt to formatting options
-            if (!ruleProvider) {
-                ruleProvider = new ts.formatting.RulesProvider();
-            }
-            ruleProvider.ensureUpToDate(options);
-            return ruleProvider;
-        }
-        function synchronizeHostData() {
-            // perform fast check if host supports it
-            if (host.getProjectVersion) {
-                var hostProjectVersion = host.getProjectVersion();
-                if (hostProjectVersion) {
-                    if (lastProjectVersion === hostProjectVersion) {
-                        return;
-                    }
-                    lastProjectVersion = hostProjectVersion;
-                }
-            }
-            // Get a fresh cache of the host information
-            var hostCache = new HostCache(host, getCanonicalFileName);
-            // If the program is already up-to-date, we can reuse it
-            if (programUpToDate()) {
-                return;
-            }
-            // IMPORTANT - It is critical from this moment onward that we do not check
-            // cancellation tokens.  We are about to mutate source files from a previous program
-            // instance.  If we cancel midway through, we may end up in an inconsistent state where
-            // the program points to old source files that have been invalidated because of
-            // incremental parsing.
-            var oldSettings = program && program.getCompilerOptions();
-            var newSettings = hostCache.compilationSettings();
-            var changesInCompilationSettingsAffectSyntax = oldSettings &&
-                (oldSettings.target !== newSettings.target ||
-                    oldSettings.module !== newSettings.module ||
-                    oldSettings.noResolve !== newSettings.noResolve ||
-                    oldSettings.jsx !== newSettings.jsx ||
-                    oldSettings.allowJs !== newSettings.allowJs);
-            // Now create a new compiler
-            var compilerHost = {
-                getSourceFile: getOrCreateSourceFile,
-                getSourceFileByPath: getOrCreateSourceFileByPath,
-                getCancellationToken: function () { return cancellationToken; },
-                getCanonicalFileName: getCanonicalFileName,
-                useCaseSensitiveFileNames: function () { return useCaseSensitivefileNames; },
-                getNewLine: function () { return ts.getNewLineOrDefaultFromHost(host); },
-                getDefaultLibFileName: function (options) { return host.getDefaultLibFileName(options); },
-                writeFile: function (fileName, data, writeByteOrderMark) { },
-                getCurrentDirectory: function () { return currentDirectory; },
-                fileExists: function (fileName) {
-                    // stub missing host functionality
-                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
-                    return hostCache.getOrCreateEntry(fileName) !== undefined;
-                },
-                readFile: function (fileName) {
-                    // stub missing host functionality
-                    var entry = hostCache.getOrCreateEntry(fileName);
-                    return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
-                },
-                directoryExists: function (directoryName) {
-                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
-                    return ts.directoryProbablyExists(directoryName, host);
-                }
-            };
-            if (host.trace) {
-                compilerHost.trace = function (message) { return host.trace(message); };
-            }
-            if (host.resolveModuleNames) {
-                compilerHost.resolveModuleNames = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
-            }
-            if (host.resolveTypeReferenceDirectives) {
-                compilerHost.resolveTypeReferenceDirectives = function (typeReferenceDirectiveNames, containingFile) {
-                    return host.resolveTypeReferenceDirectives(typeReferenceDirectiveNames, containingFile);
-                };
-            }
-            var documentRegistryBucketKey = documentRegistry.getKeyForCompilationSettings(newSettings);
-            var newProgram = ts.createProgram(hostCache.getRootFileNames(), newSettings, compilerHost, program);
-            // Release any files we have acquired in the old program but are
-            // not part of the new program.
-            if (program) {
-                var oldSourceFiles = program.getSourceFiles();
-                var oldSettingsKey = documentRegistry.getKeyForCompilationSettings(oldSettings);
-                for (var _i = 0, oldSourceFiles_1 = oldSourceFiles; _i < oldSourceFiles_1.length; _i++) {
-                    var oldSourceFile = oldSourceFiles_1[_i];
-                    if (!newProgram.getSourceFile(oldSourceFile.fileName) || changesInCompilationSettingsAffectSyntax) {
-                        documentRegistry.releaseDocumentWithKey(oldSourceFile.path, oldSettingsKey);
-                    }
-                }
-            }
-            // hostCache is captured in the closure for 'getOrCreateSourceFile' but it should not be used past this point.
-            // It needs to be cleared to allow all collected snapshots to be released
-            hostCache = undefined;
-            program = newProgram;
-            // Make sure all the nodes in the program are both bound, and have their parent
-            // pointers set property.
-            program.getTypeChecker();
-            return;
-            function getOrCreateSourceFile(fileName) {
-                return getOrCreateSourceFileByPath(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName));
-            }
-            function getOrCreateSourceFileByPath(fileName, path) {
-                ts.Debug.assert(hostCache !== undefined);
-                // The program is asking for this file, check first if the host can locate it.
-                // If the host can not locate the file, then it does not exist. return undefined
-                // to the program to allow reporting of errors for missing files.
-                var hostFileInformation = hostCache.getOrCreateEntryByPath(fileName, path);
-                if (!hostFileInformation) {
-                    return undefined;
-                }
-                // Check if the language version has changed since we last created a program; if they are the same,
-                // it is safe to reuse the sourceFiles; if not, then the shape of the AST can change, and the oldSourceFile
-                // can not be reused. we have to dump all syntax trees and create new ones.
-                if (!changesInCompilationSettingsAffectSyntax) {
-                    // Check if the old program had this file already
-                    var oldSourceFile = program && program.getSourceFileByPath(path);
-                    if (oldSourceFile) {
-                        // We already had a source file for this file name.  Go to the registry to
-                        // ensure that we get the right up to date version of it.  We need this to
-                        // address the following race-condition.  Specifically, say we have the following:
-                        //
-                        //      LS1
-                        //          \
-                        //           DocumentRegistry
-                        //          /
-                        //      LS2
-                        //
-                        // Each LS has a reference to file 'foo.ts' at version 1.  LS2 then updates
-                        // it's version of 'foo.ts' to version 2.  This will cause LS2 and the
-                        // DocumentRegistry to have version 2 of the document.  HOwever, LS1 will
-                        // have version 1.  And *importantly* this source file will be *corrupt*.
-                        // The act of creating version 2 of the file irrevocably damages the version
-                        // 1 file.
-                        //
-                        // So, later when we call into LS1, we need to make sure that it doesn't use
-                        // it's source file any more, and instead defers to DocumentRegistry to get
-                        // either version 1, version 2 (or some other version) depending on what the
-                        // host says should be used.
-                        // We do not support the scenario where a host can modify a registered
-                        // file's script kind, i.e. in one project some file is treated as ".ts"
-                        // and in another as ".js"
-                        ts.Debug.assert(hostFileInformation.scriptKind === oldSourceFile.scriptKind, "Registered script kind (" + oldSourceFile.scriptKind + ") should match new script kind (" + hostFileInformation.scriptKind + ") for file: " + path);
-                        return documentRegistry.updateDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
-                    }
-                }
-                // Could not find this file in the old program, create a new SourceFile for it.
-                return documentRegistry.acquireDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
-            }
-            function sourceFileUpToDate(sourceFile) {
-                if (!sourceFile) {
-                    return false;
-                }
-                var path = sourceFile.path || ts.toPath(sourceFile.fileName, currentDirectory, getCanonicalFileName);
-                return sourceFile.version === hostCache.getVersion(path);
-            }
-            function programUpToDate() {
-                // If we haven't create a program yet, then it is not up-to-date
-                if (!program) {
-                    return false;
-                }
-                // If number of files in the program do not match, it is not up-to-date
-                var rootFileNames = hostCache.getRootFileNames();
-                if (program.getSourceFiles().length !== rootFileNames.length) {
-                    return false;
-                }
-                // If any file is not up-to-date, then the whole program is not up-to-date
-                for (var _i = 0, rootFileNames_2 = rootFileNames; _i < rootFileNames_2.length; _i++) {
-                    var fileName = rootFileNames_2[_i];
-                    if (!sourceFileUpToDate(program.getSourceFile(fileName))) {
-                        return false;
-                    }
-                }
-                // If the compilation settings do no match, then the program is not up-to-date
-                return ts.compareDataObjects(program.getCompilerOptions(), hostCache.compilationSettings());
-            }
-        }
-        function getProgram() {
-            synchronizeHostData();
-            return program;
-        }
-        function cleanupSemanticCache() {
-            // TODO: Should we jettison the program (or it's type checker) here?
-        }
-        function dispose() {
-            if (program) {
-                ts.forEach(program.getSourceFiles(), function (f) {
-                    return documentRegistry.releaseDocument(f.fileName, program.getCompilerOptions());
-                });
-            }
-        }
-        /// Diagnostics
-        function getSyntacticDiagnostics(fileName) {
-            synchronizeHostData();
-            return program.getSyntacticDiagnostics(getValidSourceFile(fileName), cancellationToken);
-        }
-        /**
-         * getSemanticDiagnostics return array of Diagnostics. If '-d' is not enabled, only report semantic errors
-         * If '-d' enabled, report both semantic and emitter errors
-         */
-        function getSemanticDiagnostics(fileName) {
-            synchronizeHostData();
-            var targetSourceFile = getValidSourceFile(fileName);
-            // Only perform the action per file regardless of '-out' flag as LanguageServiceHost is expected to call this function per file.
-            // Therefore only get diagnostics for given file.
-            var semanticDiagnostics = program.getSemanticDiagnostics(targetSourceFile, cancellationToken);
-            if (!program.getCompilerOptions().declaration) {
-                return semanticDiagnostics;
-            }
-            // If '-d' is enabled, check for emitter error. One example of emitter error is export class implements non-export interface
-            var declarationDiagnostics = program.getDeclarationDiagnostics(targetSourceFile, cancellationToken);
-            return ts.concatenate(semanticDiagnostics, declarationDiagnostics);
-        }
-        function getCompilerOptionsDiagnostics() {
-            synchronizeHostData();
-            return program.getOptionsDiagnostics(cancellationToken).concat(program.getGlobalDiagnostics(cancellationToken));
-        }
-        /**
-         * Get the name to be display in completion from a given symbol.
-         *
-         * @return undefined if the name is of external module otherwise a name with striped of any quote
-         */
-        function getCompletionEntryDisplayNameForSymbol(symbol, target, performCharacterChecks, location) {
-            var displayName = ts.getDeclaredName(program.getTypeChecker(), symbol, location);
-            if (displayName) {
-                var firstCharCode = displayName.charCodeAt(0);
-                // First check of the displayName is not external module; if it is an external module, it is not valid entry
-                if ((symbol.flags & 1536 /* Namespace */) && (firstCharCode === 39 /* singleQuote */ || firstCharCode === 34 /* doubleQuote */)) {
-                    // If the symbol is external module, don't show it in the completion list
-                    // (i.e declare module "http" { const x; } | // <= request completion here, "http" should not be there)
-                    return undefined;
-                }
-            }
-            return getCompletionEntryDisplayName(displayName, target, performCharacterChecks);
-        }
-        /**
-         * Get a displayName from a given for completion list, performing any necessary quotes stripping
-         * and checking whether the name is valid identifier name.
-         */
-        function getCompletionEntryDisplayName(name, target, performCharacterChecks) {
-            if (!name) {
-                return undefined;
-            }
-            name = ts.stripQuotes(name);
-            if (!name) {
-                return undefined;
-            }
-            // If the user entered name for the symbol was quoted, removing the quotes is not enough, as the name could be an
-            // invalid identifier name. We need to check if whatever was inside the quotes is actually a valid identifier name.
-            // e.g "b a" is valid quoted name but when we strip off the quotes, it is invalid.
-            // We, thus, need to check if whatever was inside the quotes is actually a valid identifier name.
-            if (performCharacterChecks) {
-                if (!ts.isIdentifier(name, target)) {
-                    return undefined;
-                }
-            }
-            return name;
-        }
-        function getCompletionData(fileName, position) {
-            var typeChecker = program.getTypeChecker();
-            var sourceFile = getValidSourceFile(fileName);
-            var isJavaScriptFile = ts.isSourceFileJavaScript(sourceFile);
-            var isJsDocTagName = false;
-            var start = new Date().getTime();
-            var currentToken = ts.getTokenAtPosition(sourceFile, position);
-            log("getCompletionData: Get current token: " + (new Date().getTime() - start));
-            start = new Date().getTime();
-            // Completion not allowed inside comments, bail out if this is the case
-            var insideComment = isInsideComment(sourceFile, currentToken, position);
-            log("getCompletionData: Is inside comment: " + (new Date().getTime() - start));
-            if (insideComment) {
-                // The current position is next to the '@' sign, when no tag name being provided yet.
-                // Provide a full list of tag names
-                if (ts.hasDocComment(sourceFile, position) && sourceFile.text.charCodeAt(position - 1) === 64 /* at */) {
-                    isJsDocTagName = true;
-                }
-                // Completion should work inside certain JsDoc tags. For example:
-                //     /** @type {number | string} */
-                // Completion should work in the brackets
-                var insideJsDocTagExpression = false;
-                var tag = ts.getJsDocTagAtPosition(sourceFile, position);
-                if (tag) {
-                    if (tag.tagName.pos <= position && position <= tag.tagName.end) {
-                        isJsDocTagName = true;
-                    }
-                    switch (tag.kind) {
-                        case 277 /* JSDocTypeTag */:
-                        case 275 /* JSDocParameterTag */:
-                        case 276 /* JSDocReturnTag */:
-                            var tagWithExpression = tag;
-                            if (tagWithExpression.typeExpression) {
-                                insideJsDocTagExpression = tagWithExpression.typeExpression.pos < position && position < tagWithExpression.typeExpression.end;
-                            }
-                            break;
-                    }
-                }
-                if (isJsDocTagName) {
-                    return { symbols: undefined, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, isJsDocTagName: isJsDocTagName };
-                }
-                if (!insideJsDocTagExpression) {
-                    // Proceed if the current position is in jsDoc tag expression; otherwise it is a normal
-                    // comment or the plain text part of a jsDoc comment, so no completion should be available
-                    log("Returning an empty list because completion was inside a regular comment or plain text part of a JsDoc comment.");
-                    return undefined;
-                }
-            }
-            start = new Date().getTime();
-            var previousToken = ts.findPrecedingToken(position, sourceFile);
-            log("getCompletionData: Get previous token 1: " + (new Date().getTime() - start));
-            // The decision to provide completion depends on the contextToken, which is determined through the previousToken.
-            // Note: 'previousToken' (and thus 'contextToken') can be undefined if we are the beginning of the file
-            var contextToken = previousToken;
-            // Check if the caret is at the end of an identifier; this is a partial identifier that we want to complete: e.g. a.toS|
-            // Skip this partial identifier and adjust the contextToken to the token that precedes it.
-            if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
-                var start_5 = new Date().getTime();
-                contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
-                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_5));
-            }
-            // Find the node where completion is requested on.
-            // Also determine whether we are trying to complete with members of that node
-            // or attributes of a JSX tag.
-            var node = currentToken;
-            var isRightOfDot = false;
-            var isRightOfOpenTag = false;
-            var isStartingCloseTag = false;
-            var location = ts.getTouchingPropertyName(sourceFile, position);
-            if (contextToken) {
-                // Bail out if this is a known invalid completion location
-                if (isCompletionListBlocker(contextToken)) {
-                    log("Returning an empty list because completion was requested in an invalid position.");
-                    return undefined;
-                }
-                var parent_16 = contextToken.parent, kind = contextToken.kind;
-                if (kind === 21 /* DotToken */) {
-                    if (parent_16.kind === 172 /* PropertyAccessExpression */) {
-                        node = contextToken.parent.expression;
-                        isRightOfDot = true;
-                    }
-                    else if (parent_16.kind === 139 /* QualifiedName */) {
-                        node = contextToken.parent.left;
-                        isRightOfDot = true;
-                    }
-                    else {
-                        // There is nothing that precedes the dot, so this likely just a stray character
-                        // or leading into a '...' token. Just bail out instead.
-                        return undefined;
-                    }
-                }
-                else if (sourceFile.languageVariant === 1 /* JSX */) {
-                    if (kind === 25 /* LessThanToken */) {
-                        isRightOfOpenTag = true;
-                        location = contextToken;
-                    }
-                    else if (kind === 39 /* SlashToken */ && contextToken.parent.kind === 245 /* JsxClosingElement */) {
-                        isStartingCloseTag = true;
-                        location = contextToken;
-                    }
-                }
-            }
-            var semanticStart = new Date().getTime();
-            var isMemberCompletion;
-            var isNewIdentifierLocation;
-            var symbols = [];
-            if (isRightOfDot) {
-                getTypeScriptMemberSymbols();
-            }
-            else if (isRightOfOpenTag) {
-                var tagSymbols = typeChecker.getJsxIntrinsicTagNames();
-                if (tryGetGlobalSymbols()) {
-                    symbols = tagSymbols.concat(symbols.filter(function (s) { return !!(s.flags & (107455 /* Value */ | 8388608 /* Alias */)); }));
-                }
-                else {
-                    symbols = tagSymbols;
-                }
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-            }
-            else if (isStartingCloseTag) {
-                var tagName = contextToken.parent.parent.openingElement.tagName;
-                var tagSymbol = typeChecker.getSymbolAtLocation(tagName);
-                if (!typeChecker.isUnknownSymbol(tagSymbol)) {
-                    symbols = [tagSymbol];
-                }
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-            }
-            else {
-                // For JavaScript or TypeScript, if we're not after a dot, then just try to get the
-                // global symbols in scope.  These results should be valid for either language as
-                // the set of symbols that can be referenced from this location.
-                if (!tryGetGlobalSymbols()) {
-                    return undefined;
-                }
-            }
-            log("getCompletionData: Semantic work: " + (new Date().getTime() - semanticStart));
-            return { symbols: symbols, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, location: location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), isJsDocTagName: isJsDocTagName };
-            function getTypeScriptMemberSymbols() {
-                // Right of dot member completion list
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-                if (node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */ || node.kind === 172 /* PropertyAccessExpression */) {
-                    var symbol = typeChecker.getSymbolAtLocation(node);
-                    // This is an alias, follow what it aliases
-                    if (symbol && symbol.flags & 8388608 /* Alias */) {
-                        symbol = typeChecker.getAliasedSymbol(symbol);
-                    }
-                    if (symbol && symbol.flags & 1952 /* HasExports */) {
-                        // Extract module or enum members
-                        var exportedSymbols = typeChecker.getExportsOfModule(symbol);
-                        ts.forEach(exportedSymbols, function (symbol) {
-                            if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
-                                symbols.push(symbol);
-                            }
-                        });
-                    }
-                }
-                var type = typeChecker.getTypeAtLocation(node);
-                addTypeProperties(type);
-            }
-            function addTypeProperties(type) {
-                if (type) {
-                    // Filter private properties
-                    for (var _i = 0, _a = type.getApparentProperties(); _i < _a.length; _i++) {
-                        var symbol = _a[_i];
-                        if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
-                            symbols.push(symbol);
-                        }
-                    }
-                    if (isJavaScriptFile && type.flags & 16384 /* Union */) {
-                        // In javascript files, for union types, we don't just get the members that
-                        // the individual types have in common, we also include all the members that
-                        // each individual type has.  This is because we're going to add all identifiers
-                        // anyways.  So we might as well elevate the members that were at least part
-                        // of the individual types to a higher status since we know what they are.
-                        var unionType = type;
-                        for (var _b = 0, _c = unionType.types; _b < _c.length; _b++) {
-                            var elementType = _c[_b];
-                            addTypeProperties(elementType);
-                        }
-                    }
-                }
-            }
-            function tryGetGlobalSymbols() {
-                var objectLikeContainer;
-                var namedImportsOrExports;
-                var jsxContainer;
-                if (objectLikeContainer = tryGetObjectLikeCompletionContainer(contextToken)) {
-                    return tryGetObjectLikeCompletionSymbols(objectLikeContainer);
-                }
-                if (namedImportsOrExports = tryGetNamedImportsOrExportsForCompletion(contextToken)) {
-                    // cursor is in an import clause
-                    // try to show exported member for imported module
-                    return tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports);
-                }
-                if (jsxContainer = tryGetContainingJsxElement(contextToken)) {
-                    var attrsType = void 0;
-                    if ((jsxContainer.kind === 242 /* JsxSelfClosingElement */) || (jsxContainer.kind === 243 /* JsxOpeningElement */)) {
-                        // Cursor is inside a JSX self-closing element or opening element
-                        attrsType = typeChecker.getJsxElementAttributesType(jsxContainer);
-                        if (attrsType) {
-                            symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), jsxContainer.attributes);
-                            isMemberCompletion = true;
-                            isNewIdentifierLocation = false;
-                            return true;
-                        }
-                    }
-                }
-                // Get all entities in the current scope.
-                isMemberCompletion = false;
-                isNewIdentifierLocation = isNewIdentifierDefinitionLocation(contextToken);
-                if (previousToken !== contextToken) {
-                    ts.Debug.assert(!!previousToken, "Expected 'contextToken' to be defined when different from 'previousToken'.");
-                }
-                // We need to find the node that will give us an appropriate scope to begin
-                // aggregating completion candidates. This is achieved in 'getScopeNode'
-                // by finding the first node that encompasses a position, accounting for whether a node
-                // is "complete" to decide whether a position belongs to the node.
-                //
-                // However, at the end of an identifier, we are interested in the scope of the identifier
-                // itself, but fall outside of the identifier. For instance:
-                //
-                //      xyz => x$
-                //
-                // the cursor is outside of both the 'x' and the arrow function 'xyz => x',
-                // so 'xyz' is not returned in our results.
-                //
-                // We define 'adjustedPosition' so that we may appropriately account for
-                // being at the end of an identifier. The intention is that if requesting completion
-                // at the end of an identifier, it should be effectively equivalent to requesting completion
-                // anywhere inside/at the beginning of the identifier. So in the previous case, the
-                // 'adjustedPosition' will work as if requesting completion in the following:
-                //
-                //      xyz => $x
-                //
-                // If previousToken !== contextToken, then
-                //   - 'contextToken' was adjusted to the token prior to 'previousToken'
-                //      because we were at the end of an identifier.
-                //   - 'previousToken' is defined.
-                var adjustedPosition = previousToken !== contextToken ?
-                    previousToken.getStart() :
-                    position;
-                var scopeNode = getScopeNode(contextToken, adjustedPosition, sourceFile) || sourceFile;
-                /// TODO filter meaning based on the current context
-                var symbolMeanings = 793056 /* Type */ | 107455 /* Value */ | 1536 /* Namespace */ | 8388608 /* Alias */;
-                symbols = typeChecker.getSymbolsInScope(scopeNode, symbolMeanings);
-                return true;
-            }
-            /**
-             * Finds the first node that "embraces" the position, so that one may
-             * accurately aggregate locals from the closest containing scope.
-             */
-            function getScopeNode(initialToken, position, sourceFile) {
-                var scope = initialToken;
-                while (scope && !ts.positionBelongsToNode(scope, position, sourceFile)) {
-                    scope = scope.parent;
-                }
-                return scope;
-            }
-            function isCompletionListBlocker(contextToken) {
-                var start = new Date().getTime();
-                var result = isInStringOrRegularExpressionOrTemplateLiteral(contextToken) ||
-                    isSolelyIdentifierDefinitionLocation(contextToken) ||
-                    isDotOfNumericLiteral(contextToken) ||
-                    isInJsxText(contextToken);
-                log("getCompletionsAtPosition: isCompletionListBlocker: " + (new Date().getTime() - start));
-                return result;
-            }
-            function isInJsxText(contextToken) {
-                if (contextToken.kind === 244 /* JsxText */) {
-                    return true;
-                }
-                if (contextToken.kind === 27 /* GreaterThanToken */ && contextToken.parent) {
-                    if (contextToken.parent.kind === 243 /* JsxOpeningElement */) {
-                        return true;
-                    }
-                    if (contextToken.parent.kind === 245 /* JsxClosingElement */ || contextToken.parent.kind === 242 /* JsxSelfClosingElement */) {
-                        return contextToken.parent.parent && contextToken.parent.parent.kind === 241 /* JsxElement */;
-                    }
-                }
-                return false;
-            }
-            function isNewIdentifierDefinitionLocation(previousToken) {
-                if (previousToken) {
-                    var containingNodeKind = previousToken.parent.kind;
-                    switch (previousToken.kind) {
-                        case 24 /* CommaToken */:
-                            return containingNodeKind === 174 /* CallExpression */ // func( a, |
-                                || containingNodeKind === 148 /* Constructor */ // constructor( a, |   /* public, protected, private keywords are allowed here, so show completion */
-                                || containingNodeKind === 175 /* NewExpression */ // new C(a, |
-                                || containingNodeKind === 170 /* ArrayLiteralExpression */ // [a, |
-                                || containingNodeKind === 187 /* BinaryExpression */ // const x = (a, |
-                                || containingNodeKind === 156 /* FunctionType */; // var x: (s: string, list|
-                        case 17 /* OpenParenToken */:
-                            return containingNodeKind === 174 /* CallExpression */ // func( |
-                                || containingNodeKind === 148 /* Constructor */ // constructor( |
-                                || containingNodeKind === 175 /* NewExpression */ // new C(a|
-                                || containingNodeKind === 178 /* ParenthesizedExpression */ // const x = (a|
-                                || containingNodeKind === 164 /* ParenthesizedType */; // function F(pred: (a| /* this can become an arrow function, where 'a' is the argument */
-                        case 19 /* OpenBracketToken */:
-                            return containingNodeKind === 170 /* ArrayLiteralExpression */ // [ |
-                                || containingNodeKind === 153 /* IndexSignature */ // [ | : string ]
-                                || containingNodeKind === 140 /* ComputedPropertyName */; // [ |    /* this can become an index signature */
-                        case 125 /* ModuleKeyword */: // module |
-                        case 126 /* NamespaceKeyword */:
-                            return true;
-                        case 21 /* DotToken */:
-                            return containingNodeKind === 225 /* ModuleDeclaration */; // module A.|
-                        case 15 /* OpenBraceToken */:
-                            return containingNodeKind === 221 /* ClassDeclaration */; // class A{ |
-                        case 56 /* EqualsToken */:
-                            return containingNodeKind === 218 /* VariableDeclaration */ // const x = a|
-                                || containingNodeKind === 187 /* BinaryExpression */; // x = a|
-                        case 12 /* TemplateHead */:
-                            return containingNodeKind === 189 /* TemplateExpression */; // `aa ${|
-                        case 13 /* TemplateMiddle */:
-                            return containingNodeKind === 197 /* TemplateSpan */; // `aa ${10} dd ${|
-                        case 112 /* PublicKeyword */:
-                        case 110 /* PrivateKeyword */:
-                        case 111 /* ProtectedKeyword */:
-                            return containingNodeKind === 145 /* PropertyDeclaration */; // class A{ public |
-                    }
-                    // Previous token may have been a keyword that was converted to an identifier.
-                    switch (previousToken.getText()) {
-                        case "public":
-                        case "protected":
-                        case "private":
-                            return true;
-                    }
-                }
-                return false;
-            }
-            function isInStringOrRegularExpressionOrTemplateLiteral(contextToken) {
-                if (contextToken.kind === 9 /* StringLiteral */
-                    || contextToken.kind === 166 /* StringLiteralType */
-                    || contextToken.kind === 10 /* RegularExpressionLiteral */
-                    || ts.isTemplateLiteralKind(contextToken.kind)) {
-                    var start_6 = contextToken.getStart();
-                    var end = contextToken.getEnd();
-                    // To be "in" one of these literals, the position has to be:
-                    //   1. entirely within the token text.
-                    //   2. at the end position of an unterminated token.
-                    //   3. at the end of a regular expression (due to trailing flags like '/foo/g').
-                    if (start_6 < position && position < end) {
-                        return true;
-                    }
-                    if (position === end) {
-                        return !!contextToken.isUnterminated
-                            || contextToken.kind === 10 /* RegularExpressionLiteral */;
-                    }
-                }
-                return false;
-            }
-            /**
-             * Aggregates relevant symbols for completion in object literals and object binding patterns.
-             * Relevant symbols are stored in the captured 'symbols' variable.
-             *
-             * @returns true if 'symbols' was successfully populated; false otherwise.
-             */
-            function tryGetObjectLikeCompletionSymbols(objectLikeContainer) {
-                // We're looking up possible property names from contextual/inferred/declared type.
-                isMemberCompletion = true;
-                var typeForObject;
-                var existingMembers;
-                if (objectLikeContainer.kind === 171 /* ObjectLiteralExpression */) {
-                    // We are completing on contextual types, but may also include properties
-                    // other than those within the declared type.
-                    isNewIdentifierLocation = true;
-                    typeForObject = typeChecker.getContextualType(objectLikeContainer);
-                    existingMembers = objectLikeContainer.properties;
-                }
-                else if (objectLikeContainer.kind === 167 /* ObjectBindingPattern */) {
-                    // We are *only* completing on properties from the type being destructured.
-                    isNewIdentifierLocation = false;
-                    var rootDeclaration = ts.getRootDeclaration(objectLikeContainer.parent);
-                    if (ts.isVariableLike(rootDeclaration)) {
-                        // We don't want to complete using the type acquired by the shape
-                        // of the binding pattern; we are only interested in types acquired
-                        // through type declaration or inference.
-                        // Also proceed if rootDeclaration is parameter and if its containing function expression\arrow function is contextually typed -
-                        // type of parameter will flow in from the contextual type of the function
-                        var canGetType = !!(rootDeclaration.initializer || rootDeclaration.type);
-                        if (!canGetType && rootDeclaration.kind === 142 /* Parameter */) {
-                            if (ts.isExpression(rootDeclaration.parent)) {
-                                canGetType = !!typeChecker.getContextualType(rootDeclaration.parent);
-                            }
-                            else if (rootDeclaration.parent.kind === 147 /* MethodDeclaration */ || rootDeclaration.parent.kind === 150 /* SetAccessor */) {
-                                canGetType = ts.isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(rootDeclaration.parent.parent);
-                            }
-                        }
-                        if (canGetType) {
-                            typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
-                            existingMembers = objectLikeContainer.elements;
-                        }
-                    }
-                    else {
-                        ts.Debug.fail("Root declaration is not variable-like.");
-                    }
-                }
-                else {
-                    ts.Debug.fail("Expected object literal or binding pattern, got " + objectLikeContainer.kind);
-                }
-                if (!typeForObject) {
-                    return false;
-                }
-                var typeMembers = typeChecker.getPropertiesOfType(typeForObject);
-                if (typeMembers && typeMembers.length > 0) {
-                    // Add filtered items to the completion list
-                    symbols = filterObjectMembersList(typeMembers, existingMembers);
-                }
-                return true;
-            }
-            /**
-             * Aggregates relevant symbols for completion in import clauses and export clauses
-             * whose declarations have a module specifier; for instance, symbols will be aggregated for
-             *
-             *      import { | } from "moduleName";
-             *      export { a as foo, | } from "moduleName";
-             *
-             * but not for
-             *
-             *      export { | };
-             *
-             * Relevant symbols are stored in the captured 'symbols' variable.
-             *
-             * @returns true if 'symbols' was successfully populated; false otherwise.
-             */
-            function tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports) {
-                var declarationKind = namedImportsOrExports.kind === 233 /* NamedImports */ ?
-                    230 /* ImportDeclaration */ :
-                    236 /* ExportDeclaration */;
-                var importOrExportDeclaration = ts.getAncestor(namedImportsOrExports, declarationKind);
-                var moduleSpecifier = importOrExportDeclaration.moduleSpecifier;
-                if (!moduleSpecifier) {
-                    return false;
-                }
-                isMemberCompletion = true;
-                isNewIdentifierLocation = false;
-                var exports;
-                var moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(importOrExportDeclaration.moduleSpecifier);
-                if (moduleSpecifierSymbol) {
-                    exports = typeChecker.getExportsOfModule(moduleSpecifierSymbol);
-                }
-                symbols = exports ? filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements) : emptyArray;
-                return true;
-            }
-            /**
-             * Returns the immediate owning object literal or binding pattern of a context token,
-             * on the condition that one exists and that the context implies completion should be given.
-             */
-            function tryGetObjectLikeCompletionContainer(contextToken) {
-                if (contextToken) {
-                    switch (contextToken.kind) {
-                        case 15 /* OpenBraceToken */: // const x = { |
-                        case 24 /* CommaToken */:
-                            var parent_17 = contextToken.parent;
-                            if (parent_17 && (parent_17.kind === 171 /* ObjectLiteralExpression */ || parent_17.kind === 167 /* ObjectBindingPattern */)) {
-                                return parent_17;
-                            }
-                            break;
-                    }
-                }
-                return undefined;
-            }
-            /**
-             * Returns the containing list of named imports or exports of a context token,
-             * on the condition that one exists and that the context implies completion should be given.
-             */
-            function tryGetNamedImportsOrExportsForCompletion(contextToken) {
-                if (contextToken) {
-                    switch (contextToken.kind) {
-                        case 15 /* OpenBraceToken */: // import { |
-                        case 24 /* CommaToken */:
-                            switch (contextToken.parent.kind) {
-                                case 233 /* NamedImports */:
-                                case 237 /* NamedExports */:
-                                    return contextToken.parent;
-                            }
-                    }
-                }
-                return undefined;
-            }
-            function tryGetContainingJsxElement(contextToken) {
-                if (contextToken) {
-                    var parent_18 = contextToken.parent;
-                    switch (contextToken.kind) {
-                        case 26 /* LessThanSlashToken */:
-                        case 39 /* SlashToken */:
-                        case 69 /* Identifier */:
-                        case 246 /* JsxAttribute */:
-                        case 247 /* JsxSpreadAttribute */:
-                            if (parent_18 && (parent_18.kind === 242 /* JsxSelfClosingElement */ || parent_18.kind === 243 /* JsxOpeningElement */)) {
-                                return parent_18;
-                            }
-                            else if (parent_18.kind === 246 /* JsxAttribute */) {
-                                return parent_18.parent;
-                            }
-                            break;
-                        // The context token is the closing } or " of an attribute, which means
-                        // its parent is a JsxExpression, whose parent is a JsxAttribute,
-                        // whose parent is a JsxOpeningLikeElement
-                        case 9 /* StringLiteral */:
-                            if (parent_18 && ((parent_18.kind === 246 /* JsxAttribute */) || (parent_18.kind === 247 /* JsxSpreadAttribute */))) {
-                                return parent_18.parent;
-                            }
-                            break;
-                        case 16 /* CloseBraceToken */:
-                            if (parent_18 &&
-                                parent_18.kind === 248 /* JsxExpression */ &&
-                                parent_18.parent &&
-                                (parent_18.parent.kind === 246 /* JsxAttribute */)) {
-                                return parent_18.parent.parent;
-                            }
-                            if (parent_18 && parent_18.kind === 247 /* JsxSpreadAttribute */) {
-                                return parent_18.parent;
-                            }
-                            break;
-                    }
-                }
-                return undefined;
-            }
-            function isFunction(kind) {
-                switch (kind) {
-                    case 179 /* FunctionExpression */:
-                    case 180 /* ArrowFunction */:
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                    case 151 /* CallSignature */:
-                    case 152 /* ConstructSignature */:
-                    case 153 /* IndexSignature */:
-                        return true;
-                }
-                return false;
-            }
-            /**
-             * @returns true if we are certain that the currently edited location must define a new location; false otherwise.
-             */
-            function isSolelyIdentifierDefinitionLocation(contextToken) {
-                var containingNodeKind = contextToken.parent.kind;
-                switch (contextToken.kind) {
-                    case 24 /* CommaToken */:
-                        return containingNodeKind === 218 /* VariableDeclaration */ ||
-                            containingNodeKind === 219 /* VariableDeclarationList */ ||
-                            containingNodeKind === 200 /* VariableStatement */ ||
-                            containingNodeKind === 224 /* EnumDeclaration */ ||
-                            isFunction(containingNodeKind) ||
-                            containingNodeKind === 221 /* ClassDeclaration */ ||
-                            containingNodeKind === 192 /* ClassExpression */ ||
-                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
-                            containingNodeKind === 168 /* ArrayBindingPattern */ ||
-                            containingNodeKind === 223 /* TypeAliasDeclaration */; // type Map, K, |
-                    case 21 /* DotToken */:
-                        return containingNodeKind === 168 /* ArrayBindingPattern */; // var [.|
-                    case 54 /* ColonToken */:
-                        return containingNodeKind === 169 /* BindingElement */; // var {x :html|
-                    case 19 /* OpenBracketToken */:
-                        return containingNodeKind === 168 /* ArrayBindingPattern */; // var [x|
-                    case 17 /* OpenParenToken */:
-                        return containingNodeKind === 252 /* CatchClause */ ||
-                            isFunction(containingNodeKind);
-                    case 15 /* OpenBraceToken */:
-                        return containingNodeKind === 224 /* EnumDeclaration */ ||
-                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
-                            containingNodeKind === 159 /* TypeLiteral */; // const x : { |
-                    case 23 /* SemicolonToken */:
-                        return containingNodeKind === 144 /* PropertySignature */ &&
-                            contextToken.parent && contextToken.parent.parent &&
-                            (contextToken.parent.parent.kind === 222 /* InterfaceDeclaration */ ||
-                                contextToken.parent.parent.kind === 159 /* TypeLiteral */); // const x : { a; |
-                    case 25 /* LessThanToken */:
-                        return containingNodeKind === 221 /* ClassDeclaration */ ||
-                            containingNodeKind === 192 /* ClassExpression */ ||
-                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
-                            containingNodeKind === 223 /* TypeAliasDeclaration */ ||
-                            isFunction(containingNodeKind);
-                    case 113 /* StaticKeyword */:
-                        return containingNodeKind === 145 /* PropertyDeclaration */;
-                    case 22 /* DotDotDotToken */:
-                        return containingNodeKind === 142 /* Parameter */ ||
-                            (contextToken.parent && contextToken.parent.parent &&
-                                contextToken.parent.parent.kind === 168 /* ArrayBindingPattern */); // var [...z|
-                    case 112 /* PublicKeyword */:
-                    case 110 /* PrivateKeyword */:
-                    case 111 /* ProtectedKeyword */:
-                        return containingNodeKind === 142 /* Parameter */;
-                    case 116 /* AsKeyword */:
-                        return containingNodeKind === 234 /* ImportSpecifier */ ||
-                            containingNodeKind === 238 /* ExportSpecifier */ ||
-                            containingNodeKind === 232 /* NamespaceImport */;
-                    case 73 /* ClassKeyword */:
-                    case 81 /* EnumKeyword */:
-                    case 107 /* InterfaceKeyword */:
-                    case 87 /* FunctionKeyword */:
-                    case 102 /* VarKeyword */:
-                    case 123 /* GetKeyword */:
-                    case 131 /* SetKeyword */:
-                    case 89 /* ImportKeyword */:
-                    case 108 /* LetKeyword */:
-                    case 74 /* ConstKeyword */:
-                    case 114 /* YieldKeyword */:
-                    case 134 /* TypeKeyword */:
-                        return true;
-                }
-                // Previous token may have been a keyword that was converted to an identifier.
-                switch (contextToken.getText()) {
-                    case "abstract":
-                    case "async":
-                    case "class":
-                    case "const":
-                    case "declare":
-                    case "enum":
-                    case "function":
-                    case "interface":
-                    case "let":
-                    case "private":
-                    case "protected":
-                    case "public":
-                    case "static":
-                    case "var":
-                    case "yield":
-                        return true;
-                }
-                return false;
-            }
-            function isDotOfNumericLiteral(contextToken) {
-                if (contextToken.kind === 8 /* NumericLiteral */) {
-                    var text = contextToken.getFullText();
-                    return text.charAt(text.length - 1) === ".";
-                }
-                return false;
-            }
-            /**
-             * Filters out completion suggestions for named imports or exports.
-             *
-             * @param exportsOfModule          The list of symbols which a module exposes.
-             * @param namedImportsOrExports    The list of existing import/export specifiers in the import/export clause.
-             *
-             * @returns Symbols to be suggested at an import/export clause, barring those whose named imports/exports
-             *          do not occur at the current position and have not otherwise been typed.
-             */
-            function filterNamedImportOrExportCompletionItems(exportsOfModule, namedImportsOrExports) {
-                var existingImportsOrExports = {};
-                for (var _i = 0, namedImportsOrExports_1 = namedImportsOrExports; _i < namedImportsOrExports_1.length; _i++) {
-                    var element = namedImportsOrExports_1[_i];
-                    // If this is the current item we are editing right now, do not filter it out
-                    if (element.getStart() <= position && position <= element.getEnd()) {
-                        continue;
-                    }
-                    var name_39 = element.propertyName || element.name;
-                    existingImportsOrExports[name_39.text] = true;
-                }
-                if (ts.isEmpty(existingImportsOrExports)) {
-                    return ts.filter(exportsOfModule, function (e) { return e.name !== "default"; });
-                }
-                return ts.filter(exportsOfModule, function (e) { return e.name !== "default" && !ts.lookUp(existingImportsOrExports, e.name); });
-            }
-            /**
-             * Filters out completion suggestions for named imports or exports.
-             *
-             * @returns Symbols to be suggested in an object binding pattern or object literal expression, barring those whose declarations
-             *          do not occur at the current position and have not otherwise been typed.
-             */
-            function filterObjectMembersList(contextualMemberSymbols, existingMembers) {
-                if (!existingMembers || existingMembers.length === 0) {
-                    return contextualMemberSymbols;
-                }
-                var existingMemberNames = {};
-                for (var _i = 0, existingMembers_1 = existingMembers; _i < existingMembers_1.length; _i++) {
-                    var m = existingMembers_1[_i];
-                    // Ignore omitted expressions for missing members
-                    if (m.kind !== 253 /* PropertyAssignment */ &&
-                        m.kind !== 254 /* ShorthandPropertyAssignment */ &&
-                        m.kind !== 169 /* BindingElement */ &&
-                        m.kind !== 147 /* MethodDeclaration */) {
-                        continue;
-                    }
-                    // If this is the current item we are editing right now, do not filter it out
-                    if (m.getStart() <= position && position <= m.getEnd()) {
-                        continue;
-                    }
-                    var existingName = void 0;
-                    if (m.kind === 169 /* BindingElement */ && m.propertyName) {
-                        // include only identifiers in completion list
-                        if (m.propertyName.kind === 69 /* Identifier */) {
-                            existingName = m.propertyName.text;
-                        }
-                    }
-                    else {
-                        // TODO(jfreeman): Account for computed property name
-                        // NOTE: if one only performs this step when m.name is an identifier,
-                        // things like '__proto__' are not filtered out.
-                        existingName = m.name.text;
-                    }
-                    existingMemberNames[existingName] = true;
-                }
-                return ts.filter(contextualMemberSymbols, function (m) { return !ts.lookUp(existingMemberNames, m.name); });
-            }
-            /**
-             * Filters out completion suggestions from 'symbols' according to existing JSX attributes.
-             *
-             * @returns Symbols to be suggested in a JSX element, barring those whose attributes
-             *          do not occur at the current position and have not otherwise been typed.
-             */
-            function filterJsxAttributes(symbols, attributes) {
-                var seenNames = {};
-                for (var _i = 0, attributes_1 = attributes; _i < attributes_1.length; _i++) {
-                    var attr = attributes_1[_i];
-                    // If this is the current item we are editing right now, do not filter it out
-                    if (attr.getStart() <= position && position <= attr.getEnd()) {
-                        continue;
-                    }
-                    if (attr.kind === 246 /* JsxAttribute */) {
-                        seenNames[attr.name.text] = true;
-                    }
-                }
-                return ts.filter(symbols, function (a) { return !ts.lookUp(seenNames, a.name); });
-            }
-        }
-        function getCompletionsAtPosition(fileName, position) {
-            synchronizeHostData();
-            var completionData = getCompletionData(fileName, position);
-            if (!completionData) {
-                return undefined;
-            }
-            var symbols = completionData.symbols, isMemberCompletion = completionData.isMemberCompletion, isNewIdentifierLocation = completionData.isNewIdentifierLocation, location = completionData.location, isJsDocTagName = completionData.isJsDocTagName;
-            if (isJsDocTagName) {
-                // If the current position is a jsDoc tag name, only tag names should be provided for completion
-                return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: getAllJsDocCompletionEntries() };
-            }
-            var sourceFile = getValidSourceFile(fileName);
-            var entries = [];
-            if (ts.isSourceFileJavaScript(sourceFile)) {
-                var uniqueNames = getCompletionEntriesFromSymbols(symbols, entries);
-                ts.addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames));
-            }
-            else {
-                if (!symbols || symbols.length === 0) {
-                    if (sourceFile.languageVariant === 1 /* JSX */ &&
-                        location.parent && location.parent.kind === 245 /* JsxClosingElement */) {
-                        // In the TypeScript JSX element, if such element is not defined. When users query for completion at closing tag,
-                        // instead of simply giving unknown value, the completion will return the tag-name of an associated opening-element.
-                        // For example:
-                        //     var x = <div> </ /*1*/>  completion list at "1" will contain "div" with type any
-                        var tagName = location.parent.parent.openingElement.tagName;
-                        entries.push({
-                            name: tagName.text,
-                            kind: undefined,
-                            kindModifiers: undefined,
-                            sortText: "0"
-                        });
-                    }
-                    else {
-                        return undefined;
-                    }
-                }
-                getCompletionEntriesFromSymbols(symbols, entries);
-            }
-            // Add keywords if this is not a member completion list
-            if (!isMemberCompletion && !isJsDocTagName) {
-                ts.addRange(entries, keywordCompletions);
-            }
-            return { isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries: entries };
-            function getJavaScriptCompletionEntries(sourceFile, position, uniqueNames) {
-                var entries = [];
-                var target = program.getCompilerOptions().target;
-                var nameTable = getNameTable(sourceFile);
-                for (var name_40 in nameTable) {
-                    // Skip identifiers produced only from the current location
-                    if (nameTable[name_40] === position) {
-                        continue;
-                    }
-                    if (!uniqueNames[name_40]) {
-                        uniqueNames[name_40] = name_40;
-                        var displayName = getCompletionEntryDisplayName(name_40, target, /*performCharacterChecks*/ true);
-                        if (displayName) {
-                            var entry = {
-                                name: displayName,
-                                kind: ScriptElementKind.warning,
-                                kindModifiers: "",
-                                sortText: "1"
-                            };
-                            entries.push(entry);
-                        }
-                    }
-                }
-                return entries;
-            }
-            function getAllJsDocCompletionEntries() {
-                return jsDocCompletionEntries || (jsDocCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
-                    return {
-                        name: tagName,
-                        kind: ScriptElementKind.keyword,
-                        kindModifiers: "",
-                        sortText: "0"
-                    };
-                }));
-            }
-            function createCompletionEntry(symbol, location) {
-                // Try to get a valid display name for this symbol, if we could not find one, then ignore it.
-                // We would like to only show things that can be added after a dot, so for instance numeric properties can
-                // not be accessed with a dot (a.1 <- invalid)
-                var displayName = getCompletionEntryDisplayNameForSymbol(symbol, program.getCompilerOptions().target, /*performCharacterChecks*/ true, location);
-                if (!displayName) {
-                    return undefined;
-                }
-                // TODO(drosen): Right now we just permit *all* semantic meanings when calling
-                // 'getSymbolKind' which is permissible given that it is backwards compatible; but
-                // really we should consider passing the meaning for the node so that we don't report
-                // that a suggestion for a value is an interface.  We COULD also just do what
-                // 'getSymbolModifiers' does, which is to use the first declaration.
-                // Use a 'sortText' of 0' so that all symbol completion entries come before any other
-                // entries (like JavaScript identifier entries).
-                return {
-                    name: displayName,
-                    kind: getSymbolKind(symbol, location),
-                    kindModifiers: getSymbolModifiers(symbol),
-                    sortText: "0"
-                };
-            }
-            function getCompletionEntriesFromSymbols(symbols, entries) {
-                var start = new Date().getTime();
-                var uniqueNames = {};
-                if (symbols) {
-                    for (var _i = 0, symbols_4 = symbols; _i < symbols_4.length; _i++) {
-                        var symbol = symbols_4[_i];
-                        var entry = createCompletionEntry(symbol, location);
-                        if (entry) {
-                            var id = ts.escapeIdentifier(entry.name);
-                            if (!ts.lookUp(uniqueNames, id)) {
-                                entries.push(entry);
-                                uniqueNames[id] = id;
-                            }
-                        }
-                    }
-                }
-                log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (new Date().getTime() - start));
-                return uniqueNames;
-            }
-        }
-        function getCompletionEntryDetails(fileName, position, entryName) {
-            synchronizeHostData();
-            // Compute all the completion symbols again.
-            var completionData = getCompletionData(fileName, position);
-            if (completionData) {
-                var symbols = completionData.symbols, location_2 = completionData.location;
-                // Find the symbol with the matching entry name.
-                var target_2 = program.getCompilerOptions().target;
-                // We don't need to perform character checks here because we're only comparing the
-                // name against 'entryName' (which is known to be good), not building a new
-                // completion entry.
-                var symbol = ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(s, target_2, /*performCharacterChecks*/ false, location_2) === entryName ? s : undefined; });
-                if (symbol) {
-                    var _a = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, getValidSourceFile(fileName), location_2, location_2, 7 /* All */), displayParts = _a.displayParts, documentation = _a.documentation, symbolKind = _a.symbolKind;
-                    return {
-                        name: entryName,
-                        kindModifiers: getSymbolModifiers(symbol),
-                        kind: symbolKind,
-                        displayParts: displayParts,
-                        documentation: documentation
-                    };
-                }
-            }
-            // Didn't find a symbol with this name.  See if we can find a keyword instead.
-            var keywordCompletion = ts.forEach(keywordCompletions, function (c) { return c.name === entryName; });
-            if (keywordCompletion) {
-                return {
-                    name: entryName,
-                    kind: ScriptElementKind.keyword,
-                    kindModifiers: ScriptElementKindModifier.none,
-                    displayParts: [ts.displayPart(entryName, SymbolDisplayPartKind.keyword)],
-                    documentation: undefined
-                };
-            }
-            return undefined;
-        }
-        // TODO(drosen): use contextual SemanticMeaning.
-        function getSymbolKind(symbol, location) {
-            var flags = symbol.getFlags();
-            if (flags & 32 /* Class */)
-                return ts.getDeclarationOfKind(symbol, 192 /* ClassExpression */) ?
-                    ScriptElementKind.localClassElement : ScriptElementKind.classElement;
-            if (flags & 384 /* Enum */)
-                return ScriptElementKind.enumElement;
-            if (flags & 524288 /* TypeAlias */)
-                return ScriptElementKind.typeElement;
-            if (flags & 64 /* Interface */)
-                return ScriptElementKind.interfaceElement;
-            if (flags & 262144 /* TypeParameter */)
-                return ScriptElementKind.typeParameterElement;
-            var result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location);
-            if (result === ScriptElementKind.unknown) {
-                if (flags & 262144 /* TypeParameter */)
-                    return ScriptElementKind.typeParameterElement;
-                if (flags & 8 /* EnumMember */)
-                    return ScriptElementKind.variableElement;
-                if (flags & 8388608 /* Alias */)
-                    return ScriptElementKind.alias;
-                if (flags & 1536 /* Module */)
-                    return ScriptElementKind.moduleElement;
-            }
-            return result;
-        }
-        function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location) {
-            var typeChecker = program.getTypeChecker();
-            if (typeChecker.isUndefinedSymbol(symbol)) {
-                return ScriptElementKind.variableElement;
-            }
-            if (typeChecker.isArgumentsSymbol(symbol)) {
-                return ScriptElementKind.localVariableElement;
-            }
-            if (location.kind === 97 /* ThisKeyword */ && ts.isExpression(location)) {
-                return ScriptElementKind.parameterElement;
-            }
-            if (flags & 3 /* Variable */) {
-                if (ts.isFirstDeclarationOfSymbolParameter(symbol)) {
-                    return ScriptElementKind.parameterElement;
-                }
-                else if (symbol.valueDeclaration && ts.isConst(symbol.valueDeclaration)) {
-                    return ScriptElementKind.constElement;
-                }
-                else if (ts.forEach(symbol.declarations, ts.isLet)) {
-                    return ScriptElementKind.letElement;
-                }
-                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localVariableElement : ScriptElementKind.variableElement;
-            }
-            if (flags & 16 /* Function */)
-                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localFunctionElement : ScriptElementKind.functionElement;
-            if (flags & 32768 /* GetAccessor */)
-                return ScriptElementKind.memberGetAccessorElement;
-            if (flags & 65536 /* SetAccessor */)
-                return ScriptElementKind.memberSetAccessorElement;
-            if (flags & 8192 /* Method */)
-                return ScriptElementKind.memberFunctionElement;
-            if (flags & 16384 /* Constructor */)
-                return ScriptElementKind.constructorImplementationElement;
-            if (flags & 4 /* Property */) {
-                if (flags & 268435456 /* SyntheticProperty */) {
-                    // If union property is result of union of non method (property/accessors/variables), it is labeled as property
-                    var unionPropertyKind = ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
-                        var rootSymbolFlags = rootSymbol.getFlags();
-                        if (rootSymbolFlags & (98308 /* PropertyOrAccessor */ | 3 /* Variable */)) {
-                            return ScriptElementKind.memberVariableElement;
-                        }
-                        ts.Debug.assert(!!(rootSymbolFlags & 8192 /* Method */));
-                    });
-                    if (!unionPropertyKind) {
-                        // If this was union of all methods,
-                        // make sure it has call signatures before we can label it as method
-                        var typeOfUnionProperty = typeChecker.getTypeOfSymbolAtLocation(symbol, location);
-                        if (typeOfUnionProperty.getCallSignatures().length) {
-                            return ScriptElementKind.memberFunctionElement;
-                        }
-                        return ScriptElementKind.memberVariableElement;
-                    }
-                    return unionPropertyKind;
-                }
-                return ScriptElementKind.memberVariableElement;
-            }
-            return ScriptElementKind.unknown;
-        }
-        function getSymbolModifiers(symbol) {
-            return symbol && symbol.declarations && symbol.declarations.length > 0
-                ? ts.getNodeModifiers(symbol.declarations[0])
-                : ScriptElementKindModifier.none;
-        }
-        // TODO(drosen): Currently completion entry details passes the SemanticMeaning.All instead of using semanticMeaning of location
-        function getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, enclosingDeclaration, location, semanticMeaning) {
-            if (semanticMeaning === void 0) { semanticMeaning = getMeaningFromLocation(location); }
-            var typeChecker = program.getTypeChecker();
-            var displayParts = [];
-            var documentation;
-            var symbolFlags = symbol.flags;
-            var symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, symbolFlags, location);
-            var hasAddedSymbolInfo;
-            var isThisExpression = location.kind === 97 /* ThisKeyword */ && ts.isExpression(location);
-            var type;
-            // Class at constructor site need to be shown as constructor apart from property,method, vars
-            if (symbolKind !== ScriptElementKind.unknown || symbolFlags & 32 /* Class */ || symbolFlags & 8388608 /* Alias */) {
-                // If it is accessor they are allowed only if location is at name of the accessor
-                if (symbolKind === ScriptElementKind.memberGetAccessorElement || symbolKind === ScriptElementKind.memberSetAccessorElement) {
-                    symbolKind = ScriptElementKind.memberVariableElement;
-                }
-                var signature = void 0;
-                type = isThisExpression ? typeChecker.getTypeAtLocation(location) : typeChecker.getTypeOfSymbolAtLocation(symbol, location);
-                if (type) {
-                    if (location.parent && location.parent.kind === 172 /* PropertyAccessExpression */) {
-                        var right = location.parent.name;
-                        // Either the location is on the right of a property access, or on the left and the right is missing
-                        if (right === location || (right && right.getFullWidth() === 0)) {
-                            location = location.parent;
-                        }
-                    }
-                    // try get the call/construct signature from the type if it matches
-                    var callExpression = void 0;
-                    if (location.kind === 174 /* CallExpression */ || location.kind === 175 /* NewExpression */) {
-                        callExpression = location;
-                    }
-                    else if (isCallExpressionTarget(location) || isNewExpressionTarget(location)) {
-                        callExpression = location.parent;
-                    }
-                    if (callExpression) {
-                        var candidateSignatures = [];
-                        signature = typeChecker.getResolvedSignature(callExpression, candidateSignatures);
-                        if (!signature && candidateSignatures.length) {
-                            // Use the first candidate:
-                            signature = candidateSignatures[0];
-                        }
-                        var useConstructSignatures = callExpression.kind === 175 /* NewExpression */ || callExpression.expression.kind === 95 /* SuperKeyword */;
-                        var allSignatures = useConstructSignatures ? type.getConstructSignatures() : type.getCallSignatures();
-                        if (!ts.contains(allSignatures, signature.target) && !ts.contains(allSignatures, signature)) {
-                            // Get the first signature if there is one -- allSignatures may contain
-                            // either the original signature or its target, so check for either
-                            signature = allSignatures.length ? allSignatures[0] : undefined;
-                        }
-                        if (signature) {
-                            if (useConstructSignatures && (symbolFlags & 32 /* Class */)) {
-                                // Constructor
-                                symbolKind = ScriptElementKind.constructorImplementationElement;
-                                addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
-                            }
-                            else if (symbolFlags & 8388608 /* Alias */) {
-                                symbolKind = ScriptElementKind.alias;
-                                pushTypePart(symbolKind);
-                                displayParts.push(ts.spacePart());
-                                if (useConstructSignatures) {
-                                    displayParts.push(ts.keywordPart(92 /* NewKeyword */));
-                                    displayParts.push(ts.spacePart());
-                                }
-                                addFullSymbolName(symbol);
-                            }
-                            else {
-                                addPrefixForAnyFunctionOrVar(symbol, symbolKind);
-                            }
-                            switch (symbolKind) {
-                                case ScriptElementKind.memberVariableElement:
-                                case ScriptElementKind.variableElement:
-                                case ScriptElementKind.constElement:
-                                case ScriptElementKind.letElement:
-                                case ScriptElementKind.parameterElement:
-                                case ScriptElementKind.localVariableElement:
-                                    // If it is call or construct signature of lambda's write type name
-                                    displayParts.push(ts.punctuationPart(54 /* ColonToken */));
-                                    displayParts.push(ts.spacePart());
-                                    if (useConstructSignatures) {
-                                        displayParts.push(ts.keywordPart(92 /* NewKeyword */));
-                                        displayParts.push(ts.spacePart());
-                                    }
-                                    if (!(type.flags & 65536 /* Anonymous */) && type.symbol) {
-                                        ts.addRange(displayParts, ts.symbolToDisplayParts(typeChecker, type.symbol, enclosingDeclaration, /*meaning*/ undefined, 1 /* WriteTypeParametersOrArguments */));
-                                    }
-                                    addSignatureDisplayParts(signature, allSignatures, 8 /* WriteArrowStyleSignature */);
-                                    break;
-                                default:
-                                    // Just signature
-                                    addSignatureDisplayParts(signature, allSignatures);
-                            }
-                            hasAddedSymbolInfo = true;
-                        }
-                    }
-                    else if ((isNameOfFunctionDeclaration(location) && !(symbol.flags & 98304 /* Accessor */)) ||
-                        (location.kind === 121 /* ConstructorKeyword */ && location.parent.kind === 148 /* Constructor */)) {
-                        // get the signature from the declaration and write it
-                        var functionDeclaration = location.parent;
-                        var allSignatures = functionDeclaration.kind === 148 /* Constructor */ ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
-                        if (!typeChecker.isImplementationOfOverload(functionDeclaration)) {
-                            signature = typeChecker.getSignatureFromDeclaration(functionDeclaration);
-                        }
-                        else {
-                            signature = allSignatures[0];
-                        }
-                        if (functionDeclaration.kind === 148 /* Constructor */) {
-                            // show (constructor) Type(...) signature
-                            symbolKind = ScriptElementKind.constructorImplementationElement;
-                            addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
-                        }
-                        else {
-                            // (function/method) symbol(..signature)
-                            addPrefixForAnyFunctionOrVar(functionDeclaration.kind === 151 /* CallSignature */ &&
-                                !(type.symbol.flags & 2048 /* TypeLiteral */ || type.symbol.flags & 4096 /* ObjectLiteral */) ? type.symbol : symbol, symbolKind);
-                        }
-                        addSignatureDisplayParts(signature, allSignatures);
-                        hasAddedSymbolInfo = true;
-                    }
-                }
-            }
-            if (symbolFlags & 32 /* Class */ && !hasAddedSymbolInfo && !isThisExpression) {
-                if (ts.getDeclarationOfKind(symbol, 192 /* ClassExpression */)) {
-                    // Special case for class expressions because we would like to indicate that
-                    // the class name is local to the class body (similar to function expression)
-                    //      (local class) class <className>
-                    pushTypePart(ScriptElementKind.localClassElement);
-                }
-                else {
-                    // Class declaration has name which is not local.
-                    displayParts.push(ts.keywordPart(73 /* ClassKeyword */));
-                }
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                writeTypeParametersOfSymbol(symbol, sourceFile);
-            }
-            if ((symbolFlags & 64 /* Interface */) && (semanticMeaning & 2 /* Type */)) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(107 /* InterfaceKeyword */));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                writeTypeParametersOfSymbol(symbol, sourceFile);
-            }
-            if (symbolFlags & 524288 /* TypeAlias */) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(134 /* TypeKeyword */));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                writeTypeParametersOfSymbol(symbol, sourceFile);
-                displayParts.push(ts.spacePart());
-                displayParts.push(ts.operatorPart(56 /* EqualsToken */));
-                displayParts.push(ts.spacePart());
-                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, typeChecker.getDeclaredTypeOfSymbol(symbol), enclosingDeclaration));
-            }
-            if (symbolFlags & 384 /* Enum */) {
-                addNewLineIfDisplayPartsExist();
-                if (ts.forEach(symbol.declarations, ts.isConstEnumDeclaration)) {
-                    displayParts.push(ts.keywordPart(74 /* ConstKeyword */));
-                    displayParts.push(ts.spacePart());
-                }
-                displayParts.push(ts.keywordPart(81 /* EnumKeyword */));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-            }
-            if (symbolFlags & 1536 /* Module */) {
-                addNewLineIfDisplayPartsExist();
-                var declaration = ts.getDeclarationOfKind(symbol, 225 /* ModuleDeclaration */);
-                var isNamespace = declaration && declaration.name && declaration.name.kind === 69 /* Identifier */;
-                displayParts.push(ts.keywordPart(isNamespace ? 126 /* NamespaceKeyword */ : 125 /* ModuleKeyword */));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-            }
-            if ((symbolFlags & 262144 /* TypeParameter */) && (semanticMeaning & 2 /* Type */)) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
-                displayParts.push(ts.textPart("type parameter"));
-                displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                displayParts.push(ts.spacePart());
-                displayParts.push(ts.keywordPart(90 /* InKeyword */));
-                displayParts.push(ts.spacePart());
-                if (symbol.parent) {
-                    // Class/Interface type parameter
-                    addFullSymbolName(symbol.parent, enclosingDeclaration);
-                    writeTypeParametersOfSymbol(symbol.parent, enclosingDeclaration);
-                }
-                else {
-                    // Method/function type parameter
-                    var declaration = ts.getDeclarationOfKind(symbol, 141 /* TypeParameter */);
-                    ts.Debug.assert(declaration !== undefined);
-                    declaration = declaration.parent;
-                    if (declaration) {
-                        if (ts.isFunctionLikeKind(declaration.kind)) {
-                            var signature = typeChecker.getSignatureFromDeclaration(declaration);
-                            if (declaration.kind === 152 /* ConstructSignature */) {
-                                displayParts.push(ts.keywordPart(92 /* NewKeyword */));
-                                displayParts.push(ts.spacePart());
-                            }
-                            else if (declaration.kind !== 151 /* CallSignature */ && declaration.name) {
-                                addFullSymbolName(declaration.symbol);
-                            }
-                            ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, sourceFile, 32 /* WriteTypeArgumentsOfSignature */));
-                        }
-                        else {
-                            // Type alias type parameter
-                            // For example
-                            //      type list<T> = T[];  // Both T will go through same code path
-                            displayParts.push(ts.keywordPart(134 /* TypeKeyword */));
-                            displayParts.push(ts.spacePart());
-                            addFullSymbolName(declaration.symbol);
-                            writeTypeParametersOfSymbol(declaration.symbol, sourceFile);
-                        }
-                    }
-                }
-            }
-            if (symbolFlags & 8 /* EnumMember */) {
-                addPrefixForAnyFunctionOrVar(symbol, "enum member");
-                var declaration = symbol.declarations[0];
-                if (declaration.kind === 255 /* EnumMember */) {
-                    var constantValue = typeChecker.getConstantValue(declaration);
-                    if (constantValue !== undefined) {
-                        displayParts.push(ts.spacePart());
-                        displayParts.push(ts.operatorPart(56 /* EqualsToken */));
-                        displayParts.push(ts.spacePart());
-                        displayParts.push(ts.displayPart(constantValue.toString(), SymbolDisplayPartKind.numericLiteral));
-                    }
-                }
-            }
-            if (symbolFlags & 8388608 /* Alias */) {
-                addNewLineIfDisplayPartsExist();
-                displayParts.push(ts.keywordPart(89 /* ImportKeyword */));
-                displayParts.push(ts.spacePart());
-                addFullSymbolName(symbol);
-                ts.forEach(symbol.declarations, function (declaration) {
-                    if (declaration.kind === 229 /* ImportEqualsDeclaration */) {
-                        var importEqualsDeclaration = declaration;
-                        if (ts.isExternalModuleImportEqualsDeclaration(importEqualsDeclaration)) {
-                            displayParts.push(ts.spacePart());
-                            displayParts.push(ts.operatorPart(56 /* EqualsToken */));
-                            displayParts.push(ts.spacePart());
-                            displayParts.push(ts.keywordPart(129 /* RequireKeyword */));
-                            displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
-                            displayParts.push(ts.displayPart(ts.getTextOfNode(ts.getExternalModuleImportEqualsDeclarationExpression(importEqualsDeclaration)), SymbolDisplayPartKind.stringLiteral));
-                            displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
-                        }
-                        else {
-                            var internalAliasSymbol = typeChecker.getSymbolAtLocation(importEqualsDeclaration.moduleReference);
-                            if (internalAliasSymbol) {
-                                displayParts.push(ts.spacePart());
-                                displayParts.push(ts.operatorPart(56 /* EqualsToken */));
-                                displayParts.push(ts.spacePart());
-                                addFullSymbolName(internalAliasSymbol, enclosingDeclaration);
-                            }
-                        }
-                        return true;
-                    }
-                });
-            }
-            if (!hasAddedSymbolInfo) {
-                if (symbolKind !== ScriptElementKind.unknown) {
-                    if (type) {
-                        if (isThisExpression) {
-                            addNewLineIfDisplayPartsExist();
-                            displayParts.push(ts.keywordPart(97 /* ThisKeyword */));
-                        }
-                        else {
-                            addPrefixForAnyFunctionOrVar(symbol, symbolKind);
-                        }
-                        // For properties, variables and local vars: show the type
-                        if (symbolKind === ScriptElementKind.memberVariableElement ||
-                            symbolFlags & 3 /* Variable */ ||
-                            symbolKind === ScriptElementKind.localVariableElement ||
-                            isThisExpression) {
-                            displayParts.push(ts.punctuationPart(54 /* ColonToken */));
-                            displayParts.push(ts.spacePart());
-                            // If the type is type parameter, format it specially
-                            if (type.symbol && type.symbol.flags & 262144 /* TypeParameter */) {
-                                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
-                                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(type, writer, enclosingDeclaration);
-                                });
-                                ts.addRange(displayParts, typeParameterParts);
-                            }
-                            else {
-                                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, type, enclosingDeclaration));
-                            }
-                        }
-                        else if (symbolFlags & 16 /* Function */ ||
-                            symbolFlags & 8192 /* Method */ ||
-                            symbolFlags & 16384 /* Constructor */ ||
-                            symbolFlags & 131072 /* Signature */ ||
-                            symbolFlags & 98304 /* Accessor */ ||
-                            symbolKind === ScriptElementKind.memberFunctionElement) {
-                            var allSignatures = type.getNonNullableType().getCallSignatures();
-                            addSignatureDisplayParts(allSignatures[0], allSignatures);
-                        }
-                    }
-                }
-                else {
-                    symbolKind = getSymbolKind(symbol, location);
-                }
-            }
-            if (!documentation) {
-                documentation = symbol.getDocumentationComment();
-            }
-            return { displayParts: displayParts, documentation: documentation, symbolKind: symbolKind };
-            function addNewLineIfDisplayPartsExist() {
-                if (displayParts.length) {
-                    displayParts.push(ts.lineBreakPart());
-                }
-            }
-            function addFullSymbolName(symbol, enclosingDeclaration) {
-                var fullSymbolDisplayParts = ts.symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration || sourceFile, /*meaning*/ undefined, 1 /* WriteTypeParametersOrArguments */ | 2 /* UseOnlyExternalAliasing */);
-                ts.addRange(displayParts, fullSymbolDisplayParts);
-            }
-            function addPrefixForAnyFunctionOrVar(symbol, symbolKind) {
-                addNewLineIfDisplayPartsExist();
-                if (symbolKind) {
-                    pushTypePart(symbolKind);
-                    displayParts.push(ts.spacePart());
-                    addFullSymbolName(symbol);
-                }
-            }
-            function pushTypePart(symbolKind) {
-                switch (symbolKind) {
-                    case ScriptElementKind.variableElement:
-                    case ScriptElementKind.functionElement:
-                    case ScriptElementKind.letElement:
-                    case ScriptElementKind.constElement:
-                    case ScriptElementKind.constructorImplementationElement:
-                        displayParts.push(ts.textOrKeywordPart(symbolKind));
-                        return;
-                    default:
-                        displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
-                        displayParts.push(ts.textOrKeywordPart(symbolKind));
-                        displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
-                        return;
-                }
-            }
-            function addSignatureDisplayParts(signature, allSignatures, flags) {
-                ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, enclosingDeclaration, flags | 32 /* WriteTypeArgumentsOfSignature */));
-                if (allSignatures.length > 1) {
-                    displayParts.push(ts.spacePart());
-                    displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
-                    displayParts.push(ts.operatorPart(35 /* PlusToken */));
-                    displayParts.push(ts.displayPart((allSignatures.length - 1).toString(), SymbolDisplayPartKind.numericLiteral));
-                    displayParts.push(ts.spacePart());
-                    displayParts.push(ts.textPart(allSignatures.length === 2 ? "overload" : "overloads"));
-                    displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
-                }
-                documentation = signature.getDocumentationComment();
-            }
-            function writeTypeParametersOfSymbol(symbol, enclosingDeclaration) {
-                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
-                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration);
-                });
-                ts.addRange(displayParts, typeParameterParts);
-            }
-        }
-        function getQuickInfoAtPosition(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            if (isLabelName(node)) {
-                return undefined;
-            }
-            var typeChecker = program.getTypeChecker();
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol || typeChecker.isUnknownSymbol(symbol)) {
-                // Try getting just type at this position and show
-                switch (node.kind) {
-                    case 69 /* Identifier */:
-                    case 172 /* PropertyAccessExpression */:
-                    case 139 /* QualifiedName */:
-                    case 97 /* ThisKeyword */:
-                    case 165 /* ThisType */:
-                    case 95 /* SuperKeyword */:
-                        // For the identifiers/this/super etc get the type at position
-                        var type = typeChecker.getTypeAtLocation(node);
-                        if (type) {
-                            return {
-                                kind: ScriptElementKind.unknown,
-                                kindModifiers: ScriptElementKindModifier.none,
-                                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
-                                displayParts: ts.typeToDisplayParts(typeChecker, type, getContainerNode(node)),
-                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined
-                            };
-                        }
-                }
-                return undefined;
-            }
-            var displayPartsDocumentationsAndKind = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, getContainerNode(node), node);
-            return {
-                kind: displayPartsDocumentationsAndKind.symbolKind,
-                kindModifiers: getSymbolModifiers(symbol),
-                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
-                displayParts: displayPartsDocumentationsAndKind.displayParts,
-                documentation: displayPartsDocumentationsAndKind.documentation
-            };
-        }
-        function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
-            return {
-                fileName: node.getSourceFile().fileName,
-                textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
-                kind: symbolKind,
-                name: symbolName,
-                containerKind: undefined,
-                containerName: containerName
-            };
-        }
-        function getDefinitionFromSymbol(symbol, node) {
-            var typeChecker = program.getTypeChecker();
-            var result = [];
-            var declarations = symbol.getDeclarations();
-            var symbolName = typeChecker.symbolToString(symbol); // Do not get scoped name, just the name of the symbol
-            var symbolKind = getSymbolKind(symbol, node);
-            var containerSymbol = symbol.parent;
-            var containerName = containerSymbol ? typeChecker.symbolToString(containerSymbol, node) : "";
-            if (!tryAddConstructSignature(symbol, node, symbolKind, symbolName, containerName, result) &&
-                !tryAddCallSignature(symbol, node, symbolKind, symbolName, containerName, result)) {
-                // Just add all the declarations.
-                ts.forEach(declarations, function (declaration) {
-                    result.push(createDefinitionInfo(declaration, symbolKind, symbolName, containerName));
-                });
-            }
-            return result;
-            function tryAddConstructSignature(symbol, location, symbolKind, symbolName, containerName, result) {
-                // Applicable only if we are in a new expression, or we are on a constructor declaration
-                // and in either case the symbol has a construct signature definition, i.e. class
-                if (isNewExpressionTarget(location) || location.kind === 121 /* ConstructorKeyword */) {
-                    if (symbol.flags & 32 /* Class */) {
-                        // Find the first class-like declaration and try to get the construct signature.
-                        for (var _i = 0, _a = symbol.getDeclarations(); _i < _a.length; _i++) {
-                            var declaration = _a[_i];
-                            if (ts.isClassLike(declaration)) {
-                                return tryAddSignature(declaration.members, 
-                                /*selectConstructors*/ true, symbolKind, symbolName, containerName, result);
-                            }
-                        }
-                        ts.Debug.fail("Expected declaration to have at least one class-like declaration");
-                    }
-                }
-                return false;
-            }
-            function tryAddCallSignature(symbol, location, symbolKind, symbolName, containerName, result) {
-                if (isCallExpressionTarget(location) || isNewExpressionTarget(location) || isNameOfFunctionDeclaration(location)) {
-                    return tryAddSignature(symbol.declarations, /*selectConstructors*/ false, symbolKind, symbolName, containerName, result);
-                }
-                return false;
-            }
-            function tryAddSignature(signatureDeclarations, selectConstructors, symbolKind, symbolName, containerName, result) {
-                var declarations = [];
-                var definition;
-                ts.forEach(signatureDeclarations, function (d) {
-                    if ((selectConstructors && d.kind === 148 /* Constructor */) ||
-                        (!selectConstructors && (d.kind === 220 /* FunctionDeclaration */ || d.kind === 147 /* MethodDeclaration */ || d.kind === 146 /* MethodSignature */))) {
-                        declarations.push(d);
-                        if (d.body)
-                            definition = d;
-                    }
-                });
-                if (definition) {
-                    result.push(createDefinitionInfo(definition, symbolKind, symbolName, containerName));
-                    return true;
-                }
-                else if (declarations.length) {
-                    result.push(createDefinitionInfo(ts.lastOrUndefined(declarations), symbolKind, symbolName, containerName));
-                    return true;
-                }
-                return false;
-            }
-        }
-        function findReferenceInPosition(refs, pos) {
-            for (var _i = 0, refs_1 = refs; _i < refs_1.length; _i++) {
-                var ref = refs_1[_i];
-                if (ref.pos <= pos && pos < ref.end) {
-                    return ref;
-                }
-            }
-            return undefined;
-        }
-        function getDefinitionInfoForFileReference(name, targetFileName) {
-            return {
-                fileName: targetFileName,
-                textSpan: ts.createTextSpanFromBounds(0, 0),
-                kind: ScriptElementKind.scriptElement,
-                name: name,
-                containerName: undefined,
-                containerKind: undefined
-            };
-        }
-        /// Goto definition
-        function getDefinitionAtPosition(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            /// Triple slash reference comments
-            var comment = findReferenceInPosition(sourceFile.referencedFiles, position);
-            if (comment) {
-                var referenceFile = ts.tryResolveScriptReference(program, sourceFile, comment);
-                if (referenceFile) {
-                    return [getDefinitionInfoForFileReference(comment.fileName, referenceFile.fileName)];
-                }
-                return undefined;
-            }
-            // Type reference directives
-            var typeReferenceDirective = findReferenceInPosition(sourceFile.typeReferenceDirectives, position);
-            if (typeReferenceDirective) {
-                var referenceFile = ts.lookUp(program.getResolvedTypeReferenceDirectives(), typeReferenceDirective.fileName);
-                if (referenceFile && referenceFile.resolvedFileName) {
-                    return [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
-                }
-                return undefined;
-            }
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            // Labels
-            if (isJumpStatementTarget(node)) {
-                var labelName = node.text;
-                var label = getTargetLabel(node.parent, node.text);
-                return label ? [createDefinitionInfo(label, ScriptElementKind.label, labelName, /*containerName*/ undefined)] : undefined;
-            }
-            var typeChecker = program.getTypeChecker();
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            // Could not find a symbol e.g. node is string or number keyword,
-            // or the symbol was an internal symbol and does not have a declaration e.g. undefined symbol
-            if (!symbol) {
-                return undefined;
-            }
-            // If this is an alias, and the request came at the declaration location
-            // get the aliased symbol instead. This allows for goto def on an import e.g.
-            //   import {A, B} from "mod";
-            // to jump to the implementation directly.
-            if (symbol.flags & 8388608 /* Alias */) {
-                var declaration = symbol.declarations[0];
-                // Go to the original declaration for cases:
-                //
-                //   (1) when the aliased symbol was declared in the location(parent).
-                //   (2) when the aliased symbol is originating from a named import.
-                //
-                if (node.kind === 69 /* Identifier */ &&
-                    (node.parent === declaration ||
-                        (declaration.kind === 234 /* ImportSpecifier */ && declaration.parent && declaration.parent.kind === 233 /* NamedImports */))) {
-                    symbol = typeChecker.getAliasedSymbol(symbol);
-                }
-            }
-            // Because name in short-hand property assignment has two different meanings: property name and property value,
-            // using go-to-definition at such position should go to the variable declaration of the property value rather than
-            // go to the declaration of the property name (in this case stay at the same position). However, if go-to-definition
-            // is performed at the location of property access, we would like to go to definition of the property in the short-hand
-            // assignment. This case and others are handled by the following code.
-            if (node.parent.kind === 254 /* ShorthandPropertyAssignment */) {
-                var shorthandSymbol = typeChecker.getShorthandAssignmentValueSymbol(symbol.valueDeclaration);
-                if (!shorthandSymbol) {
-                    return [];
-                }
-                var shorthandDeclarations = shorthandSymbol.getDeclarations();
-                var shorthandSymbolKind_1 = getSymbolKind(shorthandSymbol, node);
-                var shorthandSymbolName_1 = typeChecker.symbolToString(shorthandSymbol);
-                var shorthandContainerName_1 = typeChecker.symbolToString(symbol.parent, node);
-                return ts.map(shorthandDeclarations, function (declaration) { return createDefinitionInfo(declaration, shorthandSymbolKind_1, shorthandSymbolName_1, shorthandContainerName_1); });
-            }
-            return getDefinitionFromSymbol(symbol, node);
-        }
-        /// Goto type
-        function getTypeDefinitionAtPosition(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            var typeChecker = program.getTypeChecker();
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol) {
-                return undefined;
-            }
-            var type = typeChecker.getTypeOfSymbolAtLocation(symbol, node);
-            if (!type) {
-                return undefined;
-            }
-            if (type.flags & 16384 /* Union */) {
-                var result_3 = [];
-                ts.forEach(type.types, function (t) {
-                    if (t.symbol) {
-                        ts.addRange(/*to*/ result_3, /*from*/ getDefinitionFromSymbol(t.symbol, node));
-                    }
-                });
-                return result_3;
-            }
-            if (!type.symbol) {
-                return undefined;
-            }
-            return getDefinitionFromSymbol(type.symbol, node);
-        }
-        function getOccurrencesAtPosition(fileName, position) {
-            var results = getOccurrencesAtPositionCore(fileName, position);
-            if (results) {
-                var sourceFile_2 = getCanonicalFileName(ts.normalizeSlashes(fileName));
-                // Get occurrences only supports reporting occurrences for the file queried.  So
-                // filter down to that list.
-                results = ts.filter(results, function (r) { return getCanonicalFileName(ts.normalizeSlashes(r.fileName)) === sourceFile_2; });
-            }
-            return results;
-        }
-        function getDocumentHighlights(fileName, position, filesToSearch) {
-            synchronizeHostData();
-            var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingWord(sourceFile, position);
-            if (!node) {
-                return undefined;
-            }
-            return getSemanticDocumentHighlights(node) || getSyntacticDocumentHighlights(node);
-            function getHighlightSpanForNode(node) {
-                var start = node.getStart();
-                var end = node.getEnd();
-                return {
-                    fileName: sourceFile.fileName,
-                    textSpan: ts.createTextSpanFromBounds(start, end),
-                    kind: HighlightSpanKind.none
-                };
-            }
-            function getSemanticDocumentHighlights(node) {
-                if (node.kind === 69 /* Identifier */ ||
-                    node.kind === 97 /* ThisKeyword */ ||
-                    node.kind === 165 /* ThisType */ ||
-                    node.kind === 95 /* SuperKeyword */ ||
-                    node.kind === 9 /* StringLiteral */ ||
-                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                    var referencedSymbols = getReferencedSymbolsForNode(node, sourceFilesToSearch, /*findInStrings*/ false, /*findInComments*/ false);
-                    return convertReferencedSymbols(referencedSymbols);
-                }
-                return undefined;
-                function convertReferencedSymbols(referencedSymbols) {
-                    if (!referencedSymbols) {
-                        return undefined;
-                    }
-                    var fileNameToDocumentHighlights = {};
-                    var result = [];
-                    for (var _i = 0, referencedSymbols_1 = referencedSymbols; _i < referencedSymbols_1.length; _i++) {
-                        var referencedSymbol = referencedSymbols_1[_i];
-                        for (var _a = 0, _b = referencedSymbol.references; _a < _b.length; _a++) {
-                            var referenceEntry = _b[_a];
-                            var fileName_1 = referenceEntry.fileName;
-                            var documentHighlights = ts.getProperty(fileNameToDocumentHighlights, fileName_1);
-                            if (!documentHighlights) {
-                                documentHighlights = { fileName: fileName_1, highlightSpans: [] };
-                                fileNameToDocumentHighlights[fileName_1] = documentHighlights;
-                                result.push(documentHighlights);
-                            }
-                            documentHighlights.highlightSpans.push({
-                                textSpan: referenceEntry.textSpan,
-                                kind: referenceEntry.isWriteAccess ? HighlightSpanKind.writtenReference : HighlightSpanKind.reference
-                            });
-                        }
-                    }
-                    return result;
-                }
-            }
-            function getSyntacticDocumentHighlights(node) {
-                var fileName = sourceFile.fileName;
-                var highlightSpans = getHighlightSpans(node);
-                if (!highlightSpans || highlightSpans.length === 0) {
-                    return undefined;
-                }
-                return [{ fileName: fileName, highlightSpans: highlightSpans }];
-                // returns true if 'node' is defined and has a matching 'kind'.
-                function hasKind(node, kind) {
-                    return node !== undefined && node.kind === kind;
-                }
-                // Null-propagating 'parent' function.
-                function parent(node) {
-                    return node && node.parent;
-                }
-                function getHighlightSpans(node) {
-                    if (node) {
-                        switch (node.kind) {
-                            case 88 /* IfKeyword */:
-                            case 80 /* ElseKeyword */:
-                                if (hasKind(node.parent, 203 /* IfStatement */)) {
-                                    return getIfElseOccurrences(node.parent);
-                                }
-                                break;
-                            case 94 /* ReturnKeyword */:
-                                if (hasKind(node.parent, 211 /* ReturnStatement */)) {
-                                    return getReturnOccurrences(node.parent);
-                                }
-                                break;
-                            case 98 /* ThrowKeyword */:
-                                if (hasKind(node.parent, 215 /* ThrowStatement */)) {
-                                    return getThrowOccurrences(node.parent);
-                                }
-                                break;
-                            case 72 /* CatchKeyword */:
-                                if (hasKind(parent(parent(node)), 216 /* TryStatement */)) {
-                                    return getTryCatchFinallyOccurrences(node.parent.parent);
-                                }
-                                break;
-                            case 100 /* TryKeyword */:
-                            case 85 /* FinallyKeyword */:
-                                if (hasKind(parent(node), 216 /* TryStatement */)) {
-                                    return getTryCatchFinallyOccurrences(node.parent);
-                                }
-                                break;
-                            case 96 /* SwitchKeyword */:
-                                if (hasKind(node.parent, 213 /* SwitchStatement */)) {
-                                    return getSwitchCaseDefaultOccurrences(node.parent);
-                                }
-                                break;
-                            case 71 /* CaseKeyword */:
-                            case 77 /* DefaultKeyword */:
-                                if (hasKind(parent(parent(parent(node))), 213 /* SwitchStatement */)) {
-                                    return getSwitchCaseDefaultOccurrences(node.parent.parent.parent);
-                                }
-                                break;
-                            case 70 /* BreakKeyword */:
-                            case 75 /* ContinueKeyword */:
-                                if (hasKind(node.parent, 210 /* BreakStatement */) || hasKind(node.parent, 209 /* ContinueStatement */)) {
-                                    return getBreakOrContinueStatementOccurrences(node.parent);
-                                }
-                                break;
-                            case 86 /* ForKeyword */:
-                                if (hasKind(node.parent, 206 /* ForStatement */) ||
-                                    hasKind(node.parent, 207 /* ForInStatement */) ||
-                                    hasKind(node.parent, 208 /* ForOfStatement */)) {
-                                    return getLoopBreakContinueOccurrences(node.parent);
-                                }
-                                break;
-                            case 104 /* WhileKeyword */:
-                            case 79 /* DoKeyword */:
-                                if (hasKind(node.parent, 205 /* WhileStatement */) || hasKind(node.parent, 204 /* DoStatement */)) {
-                                    return getLoopBreakContinueOccurrences(node.parent);
-                                }
-                                break;
-                            case 121 /* ConstructorKeyword */:
-                                if (hasKind(node.parent, 148 /* Constructor */)) {
-                                    return getConstructorOccurrences(node.parent);
-                                }
-                                break;
-                            case 123 /* GetKeyword */:
-                            case 131 /* SetKeyword */:
-                                if (hasKind(node.parent, 149 /* GetAccessor */) || hasKind(node.parent, 150 /* SetAccessor */)) {
-                                    return getGetAndSetOccurrences(node.parent);
-                                }
-                                break;
-                            default:
-                                if (ts.isModifierKind(node.kind) && node.parent &&
-                                    (ts.isDeclaration(node.parent) || node.parent.kind === 200 /* VariableStatement */)) {
-                                    return getModifierOccurrences(node.kind, node.parent);
-                                }
-                        }
-                    }
-                    return undefined;
-                }
-                /**
-                 * Aggregates all throw-statements within this node *without* crossing
-                 * into function boundaries and try-blocks with catch-clauses.
-                 */
-                function aggregateOwnedThrowStatements(node) {
-                    var statementAccumulator = [];
-                    aggregate(node);
-                    return statementAccumulator;
-                    function aggregate(node) {
-                        if (node.kind === 215 /* ThrowStatement */) {
-                            statementAccumulator.push(node);
-                        }
-                        else if (node.kind === 216 /* TryStatement */) {
-                            var tryStatement = node;
-                            if (tryStatement.catchClause) {
-                                aggregate(tryStatement.catchClause);
-                            }
-                            else {
-                                // Exceptions thrown within a try block lacking a catch clause
-                                // are "owned" in the current context.
-                                aggregate(tryStatement.tryBlock);
-                            }
-                            if (tryStatement.finallyBlock) {
-                                aggregate(tryStatement.finallyBlock);
-                            }
-                        }
-                        else if (!ts.isFunctionLike(node)) {
-                            ts.forEachChild(node, aggregate);
-                        }
-                    }
-                }
-                /**
-                 * For lack of a better name, this function takes a throw statement and returns the
-                 * nearest ancestor that is a try-block (whose try statement has a catch clause),
-                 * function-block, or source file.
-                 */
-                function getThrowStatementOwner(throwStatement) {
-                    var child = throwStatement;
-                    while (child.parent) {
-                        var parent_19 = child.parent;
-                        if (ts.isFunctionBlock(parent_19) || parent_19.kind === 256 /* SourceFile */) {
-                            return parent_19;
-                        }
-                        // A throw-statement is only owned by a try-statement if the try-statement has
-                        // a catch clause, and if the throw-statement occurs within the try block.
-                        if (parent_19.kind === 216 /* TryStatement */) {
-                            var tryStatement = parent_19;
-                            if (tryStatement.tryBlock === child && tryStatement.catchClause) {
-                                return child;
-                            }
-                        }
-                        child = parent_19;
-                    }
-                    return undefined;
-                }
-                function aggregateAllBreakAndContinueStatements(node) {
-                    var statementAccumulator = [];
-                    aggregate(node);
-                    return statementAccumulator;
-                    function aggregate(node) {
-                        if (node.kind === 210 /* BreakStatement */ || node.kind === 209 /* ContinueStatement */) {
-                            statementAccumulator.push(node);
-                        }
-                        else if (!ts.isFunctionLike(node)) {
-                            ts.forEachChild(node, aggregate);
-                        }
-                    }
-                }
-                function ownsBreakOrContinueStatement(owner, statement) {
-                    var actualOwner = getBreakOrContinueOwner(statement);
-                    return actualOwner && actualOwner === owner;
-                }
-                function getBreakOrContinueOwner(statement) {
-                    for (var node_1 = statement.parent; node_1; node_1 = node_1.parent) {
-                        switch (node_1.kind) {
-                            case 213 /* SwitchStatement */:
-                                if (statement.kind === 209 /* ContinueStatement */) {
-                                    continue;
-                                }
-                            // Fall through.
-                            case 206 /* ForStatement */:
-                            case 207 /* ForInStatement */:
-                            case 208 /* ForOfStatement */:
-                            case 205 /* WhileStatement */:
-                            case 204 /* DoStatement */:
-                                if (!statement.label || isLabeledBy(node_1, statement.label.text)) {
-                                    return node_1;
-                                }
-                                break;
-                            default:
-                                // Don't cross function boundaries.
-                                if (ts.isFunctionLike(node_1)) {
-                                    return undefined;
-                                }
-                                break;
-                        }
-                    }
-                    return undefined;
-                }
-                function getModifierOccurrences(modifier, declaration) {
-                    var container = declaration.parent;
-                    // Make sure we only highlight the keyword when it makes sense to do so.
-                    if (ts.isAccessibilityModifier(modifier)) {
-                        if (!(container.kind === 221 /* ClassDeclaration */ ||
-                            container.kind === 192 /* ClassExpression */ ||
-                            (declaration.kind === 142 /* Parameter */ && hasKind(container, 148 /* Constructor */)))) {
-                            return undefined;
-                        }
-                    }
-                    else if (modifier === 113 /* StaticKeyword */) {
-                        if (!(container.kind === 221 /* ClassDeclaration */ || container.kind === 192 /* ClassExpression */)) {
-                            return undefined;
-                        }
-                    }
-                    else if (modifier === 82 /* ExportKeyword */ || modifier === 122 /* DeclareKeyword */) {
-                        if (!(container.kind === 226 /* ModuleBlock */ || container.kind === 256 /* SourceFile */)) {
-                            return undefined;
-                        }
-                    }
-                    else if (modifier === 115 /* AbstractKeyword */) {
-                        if (!(container.kind === 221 /* ClassDeclaration */ || declaration.kind === 221 /* ClassDeclaration */)) {
-                            return undefined;
-                        }
-                    }
-                    else {
-                        // unsupported modifier
-                        return undefined;
-                    }
-                    var keywords = [];
-                    var modifierFlag = getFlagFromModifier(modifier);
-                    var nodes;
-                    switch (container.kind) {
-                        case 226 /* ModuleBlock */:
-                        case 256 /* SourceFile */:
-                            // Container is either a class declaration or the declaration is a classDeclaration
-                            if (modifierFlag & 128 /* Abstract */) {
-                                nodes = declaration.members.concat(declaration);
-                            }
-                            else {
-                                nodes = container.statements;
-                            }
-                            break;
-                        case 148 /* Constructor */:
-                            nodes = container.parameters.concat(container.parent.members);
-                            break;
-                        case 221 /* ClassDeclaration */:
-                        case 192 /* ClassExpression */:
-                            nodes = container.members;
-                            // If we're an accessibility modifier, we're in an instance member and should search
-                            // the constructor's parameter list for instance members as well.
-                            if (modifierFlag & 28 /* AccessibilityModifier */) {
-                                var constructor = ts.forEach(container.members, function (member) {
-                                    return member.kind === 148 /* Constructor */ && member;
-                                });
-                                if (constructor) {
-                                    nodes = nodes.concat(constructor.parameters);
-                                }
-                            }
-                            else if (modifierFlag & 128 /* Abstract */) {
-                                nodes = nodes.concat(container);
-                            }
-                            break;
-                        default:
-                            ts.Debug.fail("Invalid container kind.");
-                    }
-                    ts.forEach(nodes, function (node) {
-                        if (node.modifiers && node.flags & modifierFlag) {
-                            ts.forEach(node.modifiers, function (child) { return pushKeywordIf(keywords, child, modifier); });
-                        }
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                    function getFlagFromModifier(modifier) {
-                        switch (modifier) {
-                            case 112 /* PublicKeyword */:
-                                return 4 /* Public */;
-                            case 110 /* PrivateKeyword */:
-                                return 8 /* Private */;
-                            case 111 /* ProtectedKeyword */:
-                                return 16 /* Protected */;
-                            case 113 /* StaticKeyword */:
-                                return 32 /* Static */;
-                            case 82 /* ExportKeyword */:
-                                return 1 /* Export */;
-                            case 122 /* DeclareKeyword */:
-                                return 2 /* Ambient */;
-                            case 115 /* AbstractKeyword */:
-                                return 128 /* Abstract */;
-                            default:
-                                ts.Debug.fail();
-                        }
-                    }
-                }
-                function pushKeywordIf(keywordList, token) {
-                    var expected = [];
-                    for (var _i = 2; _i < arguments.length; _i++) {
-                        expected[_i - 2] = arguments[_i];
-                    }
-                    if (token && ts.contains(expected, token.kind)) {
-                        keywordList.push(token);
-                        return true;
-                    }
-                    return false;
-                }
-                function getGetAndSetOccurrences(accessorDeclaration) {
-                    var keywords = [];
-                    tryPushAccessorKeyword(accessorDeclaration.symbol, 149 /* GetAccessor */);
-                    tryPushAccessorKeyword(accessorDeclaration.symbol, 150 /* SetAccessor */);
-                    return ts.map(keywords, getHighlightSpanForNode);
-                    function tryPushAccessorKeyword(accessorSymbol, accessorKind) {
-                        var accessor = ts.getDeclarationOfKind(accessorSymbol, accessorKind);
-                        if (accessor) {
-                            ts.forEach(accessor.getChildren(), function (child) { return pushKeywordIf(keywords, child, 123 /* GetKeyword */, 131 /* SetKeyword */); });
-                        }
-                    }
-                }
-                function getConstructorOccurrences(constructorDeclaration) {
-                    var declarations = constructorDeclaration.symbol.getDeclarations();
-                    var keywords = [];
-                    ts.forEach(declarations, function (declaration) {
-                        ts.forEach(declaration.getChildren(), function (token) {
-                            return pushKeywordIf(keywords, token, 121 /* ConstructorKeyword */);
-                        });
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getLoopBreakContinueOccurrences(loopNode) {
-                    var keywords = [];
-                    if (pushKeywordIf(keywords, loopNode.getFirstToken(), 86 /* ForKeyword */, 104 /* WhileKeyword */, 79 /* DoKeyword */)) {
-                        // If we succeeded and got a do-while loop, then start looking for a 'while' keyword.
-                        if (loopNode.kind === 204 /* DoStatement */) {
-                            var loopTokens = loopNode.getChildren();
-                            for (var i = loopTokens.length - 1; i >= 0; i--) {
-                                if (pushKeywordIf(keywords, loopTokens[i], 104 /* WhileKeyword */)) {
-                                    break;
-                                }
-                            }
-                        }
-                    }
-                    var breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
-                    ts.forEach(breaksAndContinues, function (statement) {
-                        if (ownsBreakOrContinueStatement(loopNode, statement)) {
-                            pushKeywordIf(keywords, statement.getFirstToken(), 70 /* BreakKeyword */, 75 /* ContinueKeyword */);
-                        }
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getBreakOrContinueStatementOccurrences(breakOrContinueStatement) {
-                    var owner = getBreakOrContinueOwner(breakOrContinueStatement);
-                    if (owner) {
-                        switch (owner.kind) {
-                            case 206 /* ForStatement */:
-                            case 207 /* ForInStatement */:
-                            case 208 /* ForOfStatement */:
-                            case 204 /* DoStatement */:
-                            case 205 /* WhileStatement */:
-                                return getLoopBreakContinueOccurrences(owner);
-                            case 213 /* SwitchStatement */:
-                                return getSwitchCaseDefaultOccurrences(owner);
-                        }
-                    }
-                    return undefined;
-                }
-                function getSwitchCaseDefaultOccurrences(switchStatement) {
-                    var keywords = [];
-                    pushKeywordIf(keywords, switchStatement.getFirstToken(), 96 /* SwitchKeyword */);
-                    // Go through each clause in the switch statement, collecting the 'case'/'default' keywords.
-                    ts.forEach(switchStatement.caseBlock.clauses, function (clause) {
-                        pushKeywordIf(keywords, clause.getFirstToken(), 71 /* CaseKeyword */, 77 /* DefaultKeyword */);
-                        var breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
-                        ts.forEach(breaksAndContinues, function (statement) {
-                            if (ownsBreakOrContinueStatement(switchStatement, statement)) {
-                                pushKeywordIf(keywords, statement.getFirstToken(), 70 /* BreakKeyword */);
-                            }
-                        });
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getTryCatchFinallyOccurrences(tryStatement) {
-                    var keywords = [];
-                    pushKeywordIf(keywords, tryStatement.getFirstToken(), 100 /* TryKeyword */);
-                    if (tryStatement.catchClause) {
-                        pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), 72 /* CatchKeyword */);
-                    }
-                    if (tryStatement.finallyBlock) {
-                        var finallyKeyword = ts.findChildOfKind(tryStatement, 85 /* FinallyKeyword */, sourceFile);
-                        pushKeywordIf(keywords, finallyKeyword, 85 /* FinallyKeyword */);
-                    }
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getThrowOccurrences(throwStatement) {
-                    var owner = getThrowStatementOwner(throwStatement);
-                    if (!owner) {
-                        return undefined;
-                    }
-                    var keywords = [];
-                    ts.forEach(aggregateOwnedThrowStatements(owner), function (throwStatement) {
-                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98 /* ThrowKeyword */);
-                    });
-                    // If the "owner" is a function, then we equate 'return' and 'throw' statements in their
-                    // ability to "jump out" of the function, and include occurrences for both.
-                    if (ts.isFunctionBlock(owner)) {
-                        ts.forEachReturnStatement(owner, function (returnStatement) {
-                            pushKeywordIf(keywords, returnStatement.getFirstToken(), 94 /* ReturnKeyword */);
-                        });
-                    }
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getReturnOccurrences(returnStatement) {
-                    var func = ts.getContainingFunction(returnStatement);
-                    // If we didn't find a containing function with a block body, bail out.
-                    if (!(func && hasKind(func.body, 199 /* Block */))) {
-                        return undefined;
-                    }
-                    var keywords = [];
-                    ts.forEachReturnStatement(func.body, function (returnStatement) {
-                        pushKeywordIf(keywords, returnStatement.getFirstToken(), 94 /* ReturnKeyword */);
-                    });
-                    // Include 'throw' statements that do not occur within a try block.
-                    ts.forEach(aggregateOwnedThrowStatements(func.body), function (throwStatement) {
-                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98 /* ThrowKeyword */);
-                    });
-                    return ts.map(keywords, getHighlightSpanForNode);
-                }
-                function getIfElseOccurrences(ifStatement) {
-                    var keywords = [];
-                    // Traverse upwards through all parent if-statements linked by their else-branches.
-                    while (hasKind(ifStatement.parent, 203 /* IfStatement */) && ifStatement.parent.elseStatement === ifStatement) {
-                        ifStatement = ifStatement.parent;
-                    }
-                    // Now traverse back down through the else branches, aggregating if/else keywords of if-statements.
-                    while (ifStatement) {
-                        var children = ifStatement.getChildren();
-                        pushKeywordIf(keywords, children[0], 88 /* IfKeyword */);
-                        // Generally the 'else' keyword is second-to-last, so we traverse backwards.
-                        for (var i = children.length - 1; i >= 0; i--) {
-                            if (pushKeywordIf(keywords, children[i], 80 /* ElseKeyword */)) {
-                                break;
-                            }
-                        }
-                        if (!hasKind(ifStatement.elseStatement, 203 /* IfStatement */)) {
-                            break;
-                        }
-                        ifStatement = ifStatement.elseStatement;
-                    }
-                    var result = [];
-                    // We'd like to highlight else/ifs together if they are only separated by whitespace
-                    // (i.e. the keywords are separated by no comments, no newlines).
-                    for (var i = 0; i < keywords.length; i++) {
-                        if (keywords[i].kind === 80 /* ElseKeyword */ && i < keywords.length - 1) {
-                            var elseKeyword = keywords[i];
-                            var ifKeyword = keywords[i + 1]; // this *should* always be an 'if' keyword.
-                            var shouldCombindElseAndIf = true;
-                            // Avoid recalculating getStart() by iterating backwards.
-                            for (var j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
-                                if (!ts.isWhiteSpace(sourceFile.text.charCodeAt(j))) {
-                                    shouldCombindElseAndIf = false;
-                                    break;
-                                }
-                            }
-                            if (shouldCombindElseAndIf) {
-                                result.push({
-                                    fileName: fileName,
-                                    textSpan: ts.createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
-                                    kind: HighlightSpanKind.reference
-                                });
-                                i++; // skip the next keyword
-                                continue;
-                            }
-                        }
-                        // Ordinary case: just highlight the keyword.
-                        result.push(getHighlightSpanForNode(keywords[i]));
-                    }
-                    return result;
-                }
-            }
-        }
-        /// References and Occurrences
-        function getOccurrencesAtPositionCore(fileName, position) {
-            synchronizeHostData();
-            return convertDocumentHighlights(getDocumentHighlights(fileName, position, [fileName]));
-            function convertDocumentHighlights(documentHighlights) {
-                if (!documentHighlights) {
-                    return undefined;
-                }
-                var result = [];
-                for (var _i = 0, documentHighlights_1 = documentHighlights; _i < documentHighlights_1.length; _i++) {
-                    var entry = documentHighlights_1[_i];
-                    for (var _a = 0, _b = entry.highlightSpans; _a < _b.length; _a++) {
-                        var highlightSpan = _b[_a];
-                        result.push({
-                            fileName: entry.fileName,
-                            textSpan: highlightSpan.textSpan,
-                            isWriteAccess: highlightSpan.kind === HighlightSpanKind.writtenReference
-                        });
-                    }
-                }
-                return result;
-            }
-        }
-        function convertReferences(referenceSymbols) {
-            if (!referenceSymbols) {
-                return undefined;
-            }
-            var referenceEntries = [];
-            for (var _i = 0, referenceSymbols_1 = referenceSymbols; _i < referenceSymbols_1.length; _i++) {
-                var referenceSymbol = referenceSymbols_1[_i];
-                ts.addRange(referenceEntries, referenceSymbol.references);
-            }
-            return referenceEntries;
-        }
-        function findRenameLocations(fileName, position, findInStrings, findInComments) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, findInStrings, findInComments);
-            return convertReferences(referencedSymbols);
-        }
-        function getReferencesAtPosition(fileName, position) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
-            return convertReferences(referencedSymbols);
-        }
-        function findReferences(fileName, position) {
-            var referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
-            // Only include referenced symbols that have a valid definition.
-            return ts.filter(referencedSymbols, function (rs) { return !!rs.definition; });
-        }
-        function findReferencedSymbols(fileName, position, findInStrings, findInComments) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var node = ts.getTouchingPropertyName(sourceFile, position);
-            if (node === sourceFile) {
-                return undefined;
-            }
-            if (node.kind !== 69 /* Identifier */ &&
-                // TODO (drosen): This should be enabled in a later release - currently breaks rename.
-                // node.kind !== SyntaxKind.ThisKeyword &&
-                // node.kind !== SyntaxKind.SuperKeyword &&
-                node.kind !== 9 /* StringLiteral */ &&
-                !isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                return undefined;
-            }
-            ts.Debug.assert(node.kind === 69 /* Identifier */ || node.kind === 8 /* NumericLiteral */ || node.kind === 9 /* StringLiteral */);
-            return getReferencedSymbolsForNode(node, program.getSourceFiles(), findInStrings, findInComments);
-        }
-        function getReferencedSymbolsForNode(node, sourceFiles, findInStrings, findInComments) {
-            var typeChecker = program.getTypeChecker();
-            // Labels
-            if (isLabelName(node)) {
-                if (isJumpStatementTarget(node)) {
-                    var labelDefinition = getTargetLabel(node.parent, node.text);
-                    // if we have a label definition, look within its statement for references, if not, then
-                    // the label is undefined and we have no results..
-                    return labelDefinition ? getLabelReferencesInNode(labelDefinition.parent, labelDefinition) : undefined;
-                }
-                else {
-                    // it is a label definition and not a target, search within the parent labeledStatement
-                    return getLabelReferencesInNode(node.parent, node);
-                }
-            }
-            if (node.kind === 97 /* ThisKeyword */ || node.kind === 165 /* ThisType */) {
-                return getReferencesForThisKeyword(node, sourceFiles);
-            }
-            if (node.kind === 95 /* SuperKeyword */) {
-                return getReferencesForSuperKeyword(node);
-            }
-            var symbol = typeChecker.getSymbolAtLocation(node);
-            if (!symbol && node.kind === 9 /* StringLiteral */) {
-                return getReferencesForStringLiteral(node, sourceFiles);
-            }
-            // Could not find a symbol e.g. unknown identifier
-            if (!symbol) {
-                // Can't have references to something that we have no symbol for.
-                return undefined;
-            }
-            var declarations = symbol.declarations;
-            // The symbol was an internal symbol and does not have a declaration e.g. undefined symbol
-            if (!declarations || !declarations.length) {
-                return undefined;
-            }
-            var result;
-            // Compute the meaning from the location and the symbol it references
-            var searchMeaning = getIntersectingMeaningFromDeclarations(getMeaningFromLocation(node), declarations);
-            // Get the text to search for.
-            // Note: if this is an external module symbol, the name doesn't include quotes.
-            var declaredName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
-            // Try to get the smallest valid scope that we can limit our search to;
-            // otherwise we'll need to search globally (i.e. include each file).
-            var scope = getSymbolScope(symbol);
-            // Maps from a symbol ID to the ReferencedSymbol entry in 'result'.
-            var symbolToIndex = [];
-            if (scope) {
-                result = [];
-                getReferencesInNode(scope, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
-            }
-            else {
-                var internedName = getInternedName(symbol, node, declarations);
-                for (var _i = 0, sourceFiles_4 = sourceFiles; _i < sourceFiles_4.length; _i++) {
-                    var sourceFile = sourceFiles_4[_i];
-                    cancellationToken.throwIfCancellationRequested();
-                    var nameTable = getNameTable(sourceFile);
-                    if (ts.lookUp(nameTable, internedName) !== undefined) {
-                        result = result || [];
-                        getReferencesInNode(sourceFile, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
-                    }
-                }
-            }
-            return result;
-            function getDefinition(symbol) {
-                var info = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, node.getSourceFile(), getContainerNode(node), node);
-                var name = ts.map(info.displayParts, function (p) { return p.text; }).join("");
-                var declarations = symbol.declarations;
-                if (!declarations || declarations.length === 0) {
-                    return undefined;
-                }
-                return {
-                    containerKind: "",
-                    containerName: "",
-                    name: name,
-                    kind: info.symbolKind,
-                    fileName: declarations[0].getSourceFile().fileName,
-                    textSpan: ts.createTextSpan(declarations[0].getStart(), 0)
-                };
-            }
-            function getAliasSymbolForPropertyNameSymbol(symbol, location) {
-                if (symbol.flags & 8388608 /* Alias */) {
-                    // Default import get alias
-                    var defaultImport = ts.getDeclarationOfKind(symbol, 231 /* ImportClause */);
-                    if (defaultImport) {
-                        return typeChecker.getAliasedSymbol(symbol);
-                    }
-                    var importOrExportSpecifier = ts.forEach(symbol.declarations, function (declaration) { return (declaration.kind === 234 /* ImportSpecifier */ ||
-                        declaration.kind === 238 /* ExportSpecifier */) ? declaration : undefined; });
-                    if (importOrExportSpecifier &&
-                        // export { a }
-                        (!importOrExportSpecifier.propertyName ||
-                            // export {a as class } where a is location
-                            importOrExportSpecifier.propertyName === location)) {
-                        // If Import specifier -> get alias
-                        // else Export specifier -> get local target
-                        return importOrExportSpecifier.kind === 234 /* ImportSpecifier */ ?
-                            typeChecker.getAliasedSymbol(symbol) :
-                            typeChecker.getExportSpecifierLocalTargetSymbol(importOrExportSpecifier);
-                    }
-                }
-                return undefined;
-            }
-            function getPropertySymbolOfDestructuringAssignment(location) {
-                return ts.isArrayLiteralOrObjectLiteralDestructuringPattern(location.parent.parent) &&
-                    typeChecker.getPropertySymbolOfDestructuringAssignment(location);
-            }
-            function isObjectBindingPatternElementWithoutPropertyName(symbol) {
-                var bindingElement = ts.getDeclarationOfKind(symbol, 169 /* BindingElement */);
-                return bindingElement &&
-                    bindingElement.parent.kind === 167 /* ObjectBindingPattern */ &&
-                    !bindingElement.propertyName;
-            }
-            function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol) {
-                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
-                    var bindingElement = ts.getDeclarationOfKind(symbol, 169 /* BindingElement */);
-                    var typeOfPattern = typeChecker.getTypeAtLocation(bindingElement.parent);
-                    return typeOfPattern && typeChecker.getPropertyOfType(typeOfPattern, bindingElement.name.text);
-                }
-                return undefined;
-            }
-            function getInternedName(symbol, location, declarations) {
-                // If this is an export or import specifier it could have been renamed using the 'as' syntax.
-                // If so we want to search for whatever under the cursor.
-                if (ts.isImportOrExportSpecifierName(location)) {
-                    return location.getText();
-                }
-                // Try to get the local symbol if we're dealing with an 'export default'
-                // since that symbol has the "true" name.
-                var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
-                symbol = localExportDefaultSymbol || symbol;
-                return ts.stripQuotes(symbol.name);
-            }
-            /**
-             * Determines the smallest scope in which a symbol may have named references.
-             * Note that not every construct has been accounted for. This function can
-             * probably be improved.
-             *
-             * @returns undefined if the scope cannot be determined, implying that
-             * a reference to a symbol can occur anywhere.
-             */
-            function getSymbolScope(symbol) {
-                // If this is the symbol of a named function expression or named class expression,
-                // then named references are limited to its own scope.
-                var valueDeclaration = symbol.valueDeclaration;
-                if (valueDeclaration && (valueDeclaration.kind === 179 /* FunctionExpression */ || valueDeclaration.kind === 192 /* ClassExpression */)) {
-                    return valueDeclaration;
-                }
-                // If this is private property or method, the scope is the containing class
-                if (symbol.flags & (4 /* Property */ | 8192 /* Method */)) {
-                    var privateDeclaration = ts.forEach(symbol.getDeclarations(), function (d) { return (d.flags & 8 /* Private */) ? d : undefined; });
-                    if (privateDeclaration) {
-                        return ts.getAncestor(privateDeclaration, 221 /* ClassDeclaration */);
-                    }
-                }
-                // If the symbol is an import we would like to find it if we are looking for what it imports.
-                // So consider it visible outside its declaration scope.
-                if (symbol.flags & 8388608 /* Alias */) {
-                    return undefined;
-                }
-                // If symbol is of object binding pattern element without property name we would want to
-                // look for property too and that could be anywhere
-                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
-                    return undefined;
-                }
-                // if this symbol is visible from its parent container, e.g. exported, then bail out
-                // if symbol correspond to the union property - bail out
-                if (symbol.parent || (symbol.flags & 268435456 /* SyntheticProperty */)) {
-                    return undefined;
-                }
-                var scope;
-                var declarations = symbol.getDeclarations();
-                if (declarations) {
-                    for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
-                        var declaration = declarations_9[_i];
-                        var container = getContainerNode(declaration);
-                        if (!container) {
-                            return undefined;
-                        }
-                        if (scope && scope !== container) {
-                            // Different declarations have different containers, bail out
-                            return undefined;
-                        }
-                        if (container.kind === 256 /* SourceFile */ && !ts.isExternalModule(container)) {
-                            // This is a global variable and not an external module, any declaration defined
-                            // within this scope is visible outside the file
-                            return undefined;
-                        }
-                        // The search scope is the container node
-                        scope = container;
-                    }
-                }
-                return scope;
-            }
-            function getPossibleSymbolReferencePositions(sourceFile, symbolName, start, end) {
-                var positions = [];
-                /// TODO: Cache symbol existence for files to save text search
-                // Also, need to make this work for unicode escapes.
-                // Be resilient in the face of a symbol with no name or zero length name
-                if (!symbolName || !symbolName.length) {
-                    return positions;
-                }
-                var text = sourceFile.text;
-                var sourceLength = text.length;
-                var symbolNameLength = symbolName.length;
-                var position = text.indexOf(symbolName, start);
-                while (position >= 0) {
-                    cancellationToken.throwIfCancellationRequested();
-                    // If we are past the end, stop looking
-                    if (position > end)
-                        break;
-                    // We found a match.  Make sure it's not part of a larger word (i.e. the char
-                    // before and after it have to be a non-identifier char).
-                    var endPosition = position + symbolNameLength;
-                    if ((position === 0 || !ts.isIdentifierPart(text.charCodeAt(position - 1), 2 /* Latest */)) &&
-                        (endPosition === sourceLength || !ts.isIdentifierPart(text.charCodeAt(endPosition), 2 /* Latest */))) {
-                        // Found a real match.  Keep searching.
-                        positions.push(position);
-                    }
-                    position = text.indexOf(symbolName, position + symbolNameLength + 1);
-                }
-                return positions;
-            }
-            function getLabelReferencesInNode(container, targetLabel) {
-                var references = [];
-                var sourceFile = container.getSourceFile();
-                var labelName = targetLabel.text;
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container.getStart(), container.getEnd());
-                ts.forEach(possiblePositions, function (position) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var node = ts.getTouchingWord(sourceFile, position);
-                    if (!node || node.getWidth() !== labelName.length) {
-                        return;
-                    }
-                    // Only pick labels that are either the target label, or have a target that is the target label
-                    if (node === targetLabel ||
-                        (isJumpStatementTarget(node) && getTargetLabel(node, labelName) === targetLabel)) {
-                        references.push(getReferenceEntryFromNode(node));
-                    }
-                });
-                var definition = {
-                    containerKind: "",
-                    containerName: "",
-                    fileName: targetLabel.getSourceFile().fileName,
-                    kind: ScriptElementKind.label,
-                    name: labelName,
-                    textSpan: ts.createTextSpanFromBounds(targetLabel.getStart(), targetLabel.getEnd())
-                };
-                return [{ definition: definition, references: references }];
-            }
-            function isValidReferencePosition(node, searchSymbolName) {
-                if (node) {
-                    // Compare the length so we filter out strict superstrings of the symbol we are looking for
-                    switch (node.kind) {
-                        case 69 /* Identifier */:
-                            return node.getWidth() === searchSymbolName.length;
-                        case 9 /* StringLiteral */:
-                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
-                                isNameOfExternalModuleImportOrDeclaration(node)) {
-                                // For string literals we have two additional chars for the quotes
-                                return node.getWidth() === searchSymbolName.length + 2;
-                            }
-                            break;
-                        case 8 /* NumericLiteral */:
-                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                                return node.getWidth() === searchSymbolName.length;
-                            }
-                            break;
-                    }
-                }
-                return false;
-            }
-            /** Search within node "container" for references for a search value, where the search value is defined as a
-              * tuple of(searchSymbol, searchText, searchLocation, and searchMeaning).
-              * searchLocation: a node where the search value
-              */
-            function getReferencesInNode(container, searchSymbol, searchText, searchLocation, searchMeaning, findInStrings, findInComments, result, symbolToIndex) {
-                var sourceFile = container.getSourceFile();
-                var tripleSlashDirectivePrefixRegex = /^\/\/\/\s*</;
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, container.getStart(), container.getEnd());
-                if (possiblePositions.length) {
-                    // Build the set of symbols to search for, initially it has only the current symbol
-                    var searchSymbols_1 = populateSearchSymbolSet(searchSymbol, searchLocation);
-                    ts.forEach(possiblePositions, function (position) {
-                        cancellationToken.throwIfCancellationRequested();
-                        var referenceLocation = ts.getTouchingPropertyName(sourceFile, position);
-                        if (!isValidReferencePosition(referenceLocation, searchText)) {
-                            // This wasn't the start of a token.  Check to see if it might be a
-                            // match in a comment or string if that's what the caller is asking
-                            // for.
-                            if ((findInStrings && ts.isInString(sourceFile, position)) ||
-                                (findInComments && isInNonReferenceComment(sourceFile, position))) {
-                                // In the case where we're looking inside comments/strings, we don't have
-                                // an actual definition.  So just use 'undefined' here.  Features like
-                                // 'Rename' won't care (as they ignore the definitions), and features like
-                                // 'FindReferences' will just filter out these results.
-                                result.push({
-                                    definition: undefined,
-                                    references: [{
-                                            fileName: sourceFile.fileName,
-                                            textSpan: ts.createTextSpan(position, searchText.length),
-                                            isWriteAccess: false
-                                        }]
-                                });
-                            }
-                            return;
-                        }
-                        if (!(getMeaningFromLocation(referenceLocation) & searchMeaning)) {
-                            return;
-                        }
-                        var referenceSymbol = typeChecker.getSymbolAtLocation(referenceLocation);
-                        if (referenceSymbol) {
-                            var referenceSymbolDeclaration = referenceSymbol.valueDeclaration;
-                            var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(referenceSymbolDeclaration);
-                            var relatedSymbol = getRelatedSymbol(searchSymbols_1, referenceSymbol, referenceLocation);
-                            if (relatedSymbol) {
-                                var referencedSymbol = getReferencedSymbol(relatedSymbol);
-                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceLocation));
-                            }
-                            else if (!(referenceSymbol.flags & 67108864 /* Transient */) && searchSymbols_1.indexOf(shorthandValueSymbol) >= 0) {
-                                var referencedSymbol = getReferencedSymbol(shorthandValueSymbol);
-                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceSymbolDeclaration.name));
-                            }
-                        }
-                    });
-                }
-                return;
-                function getReferencedSymbol(symbol) {
-                    var symbolId = ts.getSymbolId(symbol);
-                    var index = symbolToIndex[symbolId];
-                    if (index === undefined) {
-                        index = result.length;
-                        symbolToIndex[symbolId] = index;
-                        result.push({
-                            definition: getDefinition(symbol),
-                            references: []
-                        });
-                    }
-                    return result[index];
-                }
-                function isInNonReferenceComment(sourceFile, position) {
-                    return ts.isInCommentHelper(sourceFile, position, isNonReferenceComment);
-                    function isNonReferenceComment(c) {
-                        var commentText = sourceFile.text.substring(c.pos, c.end);
-                        return !tripleSlashDirectivePrefixRegex.test(commentText);
-                    }
-                }
-            }
-            function getReferencesForSuperKeyword(superKeyword) {
-                var searchSpaceNode = ts.getSuperContainer(superKeyword, /*stopOnFunctions*/ false);
-                if (!searchSpaceNode) {
-                    return undefined;
-                }
-                // Whether 'super' occurs in a static context within a class.
-                var staticFlag = 32 /* Static */;
-                switch (searchSpaceNode.kind) {
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        staticFlag &= searchSpaceNode.flags;
-                        searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
-                        break;
-                    default:
-                        return undefined;
-                }
-                var references = [];
-                var sourceFile = searchSpaceNode.getSourceFile();
-                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
-                ts.forEach(possiblePositions, function (position) {
-                    cancellationToken.throwIfCancellationRequested();
-                    var node = ts.getTouchingWord(sourceFile, position);
-                    if (!node || node.kind !== 95 /* SuperKeyword */) {
-                        return;
-                    }
-                    var container = ts.getSuperContainer(node, /*stopOnFunctions*/ false);
-                    // If we have a 'super' container, we must have an enclosing class.
-                    // Now make sure the owning class is the same as the search-space
-                    // and has the same static qualifier as the original 'super's owner.
-                    if (container && (32 /* Static */ & container.flags) === staticFlag && container.parent.symbol === searchSpaceNode.symbol) {
-                        references.push(getReferenceEntryFromNode(node));
-                    }
-                });
-                var definition = getDefinition(searchSpaceNode.symbol);
-                return [{ definition: definition, references: references }];
-            }
-            function getReferencesForThisKeyword(thisOrSuperKeyword, sourceFiles) {
-                var searchSpaceNode = ts.getThisContainer(thisOrSuperKeyword, /* includeArrowFunctions */ false);
-                // Whether 'this' occurs in a static context within a class.
-                var staticFlag = 32 /* Static */;
-                switch (searchSpaceNode.kind) {
-                    case 147 /* MethodDeclaration */:
-                    case 146 /* MethodSignature */:
-                        if (ts.isObjectLiteralMethod(searchSpaceNode)) {
-                            break;
-                        }
-                    // fall through
-                    case 145 /* PropertyDeclaration */:
-                    case 144 /* PropertySignature */:
-                    case 148 /* Constructor */:
-                    case 149 /* GetAccessor */:
-                    case 150 /* SetAccessor */:
-                        staticFlag &= searchSpaceNode.flags;
-                        searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
-                        break;
-                    case 256 /* SourceFile */:
-                        if (ts.isExternalModule(searchSpaceNode)) {
-                            return undefined;
-                        }
-                    // Fall through
-                    case 220 /* FunctionDeclaration */:
-                    case 179 /* FunctionExpression */:
-                        break;
-                    // Computed properties in classes are not handled here because references to this are illegal,
-                    // so there is no point finding references to them.
-                    default:
-                        return undefined;
-                }
-                var references = [];
-                var possiblePositions;
-                if (searchSpaceNode.kind === 256 /* SourceFile */) {
-                    ts.forEach(sourceFiles, function (sourceFile) {
-                        possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", sourceFile.getStart(), sourceFile.getEnd());
-                        getThisReferencesInFile(sourceFile, sourceFile, possiblePositions, references);
-                    });
-                }
-                else {
-                    var sourceFile = searchSpaceNode.getSourceFile();
-                    possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
-                    getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, references);
-                }
-                return [{
-                        definition: {
-                            containerKind: "",
-                            containerName: "",
-                            fileName: node.getSourceFile().fileName,
-                            kind: ScriptElementKind.variableElement,
-                            name: "this",
-                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
-                        },
-                        references: references
-                    }];
-                function getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, result) {
-                    ts.forEach(possiblePositions, function (position) {
-                        cancellationToken.throwIfCancellationRequested();
-                        var node = ts.getTouchingWord(sourceFile, position);
-                        if (!node || (node.kind !== 97 /* ThisKeyword */ && node.kind !== 165 /* ThisType */)) {
-                            return;
-                        }
-                        var container = ts.getThisContainer(node, /* includeArrowFunctions */ false);
-                        switch (searchSpaceNode.kind) {
-                            case 179 /* FunctionExpression */:
-                            case 220 /* FunctionDeclaration */:
-                                if (searchSpaceNode.symbol === container.symbol) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                            case 147 /* MethodDeclaration */:
-                            case 146 /* MethodSignature */:
-                                if (ts.isObjectLiteralMethod(searchSpaceNode) && searchSpaceNode.symbol === container.symbol) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                            case 192 /* ClassExpression */:
-                            case 221 /* ClassDeclaration */:
-                                // Make sure the container belongs to the same class
-                                // and has the appropriate static modifier from the original container.
-                                if (container.parent && searchSpaceNode.symbol === container.parent.symbol && (container.flags & 32 /* Static */) === staticFlag) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                            case 256 /* SourceFile */:
-                                if (container.kind === 256 /* SourceFile */ && !ts.isExternalModule(container)) {
-                                    result.push(getReferenceEntryFromNode(node));
-                                }
-                                break;
-                        }
-                    });
-                }
-            }
-            function getReferencesForStringLiteral(node, sourceFiles) {
-                var typeChecker = program.getTypeChecker();
-                var type = getStringLiteralTypeForNode(node, typeChecker);
-                if (!type) {
-                    // nothing to do here. moving on
-                    return undefined;
-                }
-                var references = [];
-                for (var _i = 0, sourceFiles_5 = sourceFiles; _i < sourceFiles_5.length; _i++) {
-                    var sourceFile = sourceFiles_5[_i];
-                    var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, type.text, sourceFile.getStart(), sourceFile.getEnd());
-                    getReferencesForStringLiteralInFile(sourceFile, type, possiblePositions, references);
-                }
-                return [{
-                        definition: {
-                            containerKind: "",
-                            containerName: "",
-                            fileName: node.getSourceFile().fileName,
-                            kind: ScriptElementKind.variableElement,
-                            name: type.text,
-                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
-                        },
-                        references: references
-                    }];
-                function getReferencesForStringLiteralInFile(sourceFile, searchType, possiblePositions, references) {
-                    for (var _i = 0, possiblePositions_1 = possiblePositions; _i < possiblePositions_1.length; _i++) {
-                        var position = possiblePositions_1[_i];
-                        cancellationToken.throwIfCancellationRequested();
-                        var node_2 = ts.getTouchingWord(sourceFile, position);
-                        if (!node_2 || node_2.kind !== 9 /* StringLiteral */) {
-                            return;
-                        }
-                        var type_1 = getStringLiteralTypeForNode(node_2, typeChecker);
-                        if (type_1 === searchType) {
-                            references.push(getReferenceEntryFromNode(node_2));
-                        }
-                    }
-                }
-            }
-            function populateSearchSymbolSet(symbol, location) {
-                // The search set contains at least the current symbol
-                var result = [symbol];
-                // If the location is name of property symbol from object literal destructuring pattern
-                // Search the property symbol
-                //      for ( { property: p2 } of elems) { }
-                var containingObjectLiteralElement = getContainingObjectLiteralElement(location);
-                if (containingObjectLiteralElement && containingObjectLiteralElement.kind !== 254 /* ShorthandPropertyAssignment */) {
-                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(location);
-                    if (propertySymbol) {
-                        result.push(propertySymbol);
-                    }
-                }
-                // If the symbol is an alias, add what it aliases to the list
-                //     import {a} from "mod";
-                //     export {a}
-                // If the symbol is an alias to default declaration, add what it aliases to the list
-                //     declare "mod" { export default class B { } }
-                //     import B from "mod";
-                //// For export specifiers, the exported name can be referring to a local symbol, e.g.:
-                ////     import {a} from "mod";
-                ////     export {a as somethingElse}
-                //// We want the *local* declaration of 'a' as declared in the import,
-                //// *not* as declared within "mod" (or farther)
-                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(symbol, location);
-                if (aliasSymbol) {
-                    result = result.concat(populateSearchSymbolSet(aliasSymbol, location));
-                }
-                // If the location is in a context sensitive location (i.e. in an object literal) try
-                // to get a contextual type for it, and add the property symbol from the contextual
-                // type to the search set
-                if (containingObjectLiteralElement) {
-                    ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
-                        ts.addRange(result, typeChecker.getRootSymbols(contextualSymbol));
-                    });
-                    /* Because in short-hand property assignment, location has two meaning : property name and as value of the property
-                     * When we do findAllReference at the position of the short-hand property assignment, we would want to have references to position of
-                     * property name and variable declaration of the identifier.
-                     * Like in below example, when querying for all references for an identifier 'name', of the property assignment, the language service
-                     * should show both 'name' in 'obj' and 'name' in variable declaration
-                     *      const name = "Foo";
-                     *      const obj = { name };
-                     * In order to do that, we will populate the search set with the value symbol of the identifier as a value of the property assignment
-                     * so that when matching with potential reference symbol, both symbols from property declaration and variable declaration
-                     * will be included correctly.
-                     */
-                    var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(location.parent);
-                    if (shorthandValueSymbol) {
-                        result.push(shorthandValueSymbol);
-                    }
-                }
-                // If the symbol.valueDeclaration is a property parameter declaration,
-                // we should include both parameter declaration symbol and property declaration symbol
-                // Parameter Declaration symbol is only visible within function scope, so the symbol is stored in constructor.locals.
-                // Property Declaration symbol is a member of the class, so the symbol is stored in its class Declaration.symbol.members
-                if (symbol.valueDeclaration && symbol.valueDeclaration.kind === 142 /* Parameter */ &&
-                    ts.isParameterPropertyDeclaration(symbol.valueDeclaration)) {
-                    result = result.concat(typeChecker.getSymbolsOfParameterPropertyDeclaration(symbol.valueDeclaration, symbol.name));
-                }
-                // If this is symbol of binding element without propertyName declaration in Object binding pattern
-                // Include the property in the search
-                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol);
-                if (bindingElementPropertySymbol) {
-                    result.push(bindingElementPropertySymbol);
-                }
-                // If this is a union property, add all the symbols from all its source symbols in all unioned types.
-                // If the symbol is an instantiation from a another symbol (e.g. widened symbol) , add the root the list
-                ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
-                    if (rootSymbol !== symbol) {
-                        result.push(rootSymbol);
-                    }
-                    // Add symbol of properties/methods of the same name in base classes and implemented interfaces definitions
-                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 /* Class */ | 64 /* Interface */)) {
-                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ {});
-                    }
-                });
-                return result;
-            }
-            /**
-             * Find symbol of the given property-name and add the symbol to the given result array
-             * @param symbol a symbol to start searching for the given propertyName
-             * @param propertyName a name of property to search for
-             * @param result an array of symbol of found property symbols
-             * @param previousIterationSymbolsCache a cache of symbol from previous iterations of calling this function to prevent infinite revisiting of the same symbol.
-             *                                The value of previousIterationSymbol is undefined when the function is first called.
-             */
-            function getPropertySymbolsFromBaseTypes(symbol, propertyName, result, previousIterationSymbolsCache) {
-                if (!symbol) {
-                    return;
-                }
-                // If the current symbol is the same as the previous-iteration symbol, we can just return the symbol that has already been visited
-                // This is particularly important for the following cases, so that we do not infinitely visit the same symbol.
-                // For example:
-                //      interface C extends C {
-                //          /*findRef*/propName: string;
-                //      }
-                // The first time getPropertySymbolsFromBaseTypes is called when finding-all-references at propName,
-                // the symbol argument will be the symbol of an interface "C" and previousIterationSymbol is undefined,
-                // the function will add any found symbol of the property-name, then its sub-routine will call
-                // getPropertySymbolsFromBaseTypes again to walk up any base types to prevent revisiting already
-                // visited symbol, interface "C", the sub-routine will pass the current symbol as previousIterationSymbol.
-                if (ts.hasProperty(previousIterationSymbolsCache, symbol.name)) {
-                    return;
-                }
-                if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
-                    ts.forEach(symbol.getDeclarations(), function (declaration) {
-                        if (ts.isClassLike(declaration)) {
-                            getPropertySymbolFromTypeReference(ts.getClassExtendsHeritageClauseElement(declaration));
-                            ts.forEach(ts.getClassImplementsHeritageClauseElements(declaration), getPropertySymbolFromTypeReference);
-                        }
-                        else if (declaration.kind === 222 /* InterfaceDeclaration */) {
-                            ts.forEach(ts.getInterfaceBaseTypeNodes(declaration), getPropertySymbolFromTypeReference);
-                        }
-                    });
-                }
-                return;
-                function getPropertySymbolFromTypeReference(typeReference) {
-                    if (typeReference) {
-                        var type = typeChecker.getTypeAtLocation(typeReference);
-                        if (type) {
-                            var propertySymbol = typeChecker.getPropertyOfType(type, propertyName);
-                            if (propertySymbol) {
-                                result.push.apply(result, typeChecker.getRootSymbols(propertySymbol));
-                            }
-                            // Visit the typeReference as well to see if it directly or indirectly use that property
-                            previousIterationSymbolsCache[symbol.name] = symbol;
-                            getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache);
-                        }
-                    }
-                }
-            }
-            function getRelatedSymbol(searchSymbols, referenceSymbol, referenceLocation) {
-                if (searchSymbols.indexOf(referenceSymbol) >= 0) {
-                    return referenceSymbol;
-                }
-                // If the reference symbol is an alias, check if what it is aliasing is one of the search
-                // symbols but by looking up for related symbol of this alias so it can handle multiple level of indirectness.
-                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(referenceSymbol, referenceLocation);
-                if (aliasSymbol) {
-                    return getRelatedSymbol(searchSymbols, aliasSymbol, referenceLocation);
-                }
-                // If the reference location is in an object literal, try to get the contextual type for the
-                // object literal, lookup the property symbol in the contextual type, and use this symbol to
-                // compare to our searchSymbol
-                var containingObjectLiteralElement = getContainingObjectLiteralElement(referenceLocation);
-                if (containingObjectLiteralElement) {
-                    var contextualSymbol = ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
-                        return ts.forEach(typeChecker.getRootSymbols(contextualSymbol), function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
-                    });
-                    if (contextualSymbol) {
-                        return contextualSymbol;
-                    }
-                    // If the reference location is the name of property from object literal destructuring pattern
-                    // Get the property symbol from the object literal's type and look if thats the search symbol
-                    // In below eg. get 'property' from type of elems iterating type
-                    //      for ( { property: p2 } of elems) { }
-                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation);
-                    if (propertySymbol && searchSymbols.indexOf(propertySymbol) >= 0) {
-                        return propertySymbol;
-                    }
-                }
-                // If the reference location is the binding element and doesn't have property name
-                // then include the binding element in the related symbols
-                //      let { a } : { a };
-                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol);
-                if (bindingElementPropertySymbol && searchSymbols.indexOf(bindingElementPropertySymbol) >= 0) {
-                    return bindingElementPropertySymbol;
-                }
-                // Unwrap symbols to get to the root (e.g. transient symbols as a result of widening)
-                // Or a union property, use its underlying unioned symbols
-                return ts.forEach(typeChecker.getRootSymbols(referenceSymbol), function (rootSymbol) {
-                    // if it is in the list, then we are done
-                    if (searchSymbols.indexOf(rootSymbol) >= 0) {
-                        return rootSymbol;
-                    }
-                    // Finally, try all properties with the same name in any type the containing type extended or implemented, and
-                    // see if any is in the list
-                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 /* Class */ | 64 /* Interface */)) {
-                        var result_4 = [];
-                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result_4, /*previousIterationSymbolsCache*/ {});
-                        return ts.forEach(result_4, function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
-                    }
-                    return undefined;
-                });
-            }
-            function getNameFromObjectLiteralElement(node) {
-                if (node.name.kind === 140 /* ComputedPropertyName */) {
-                    var nameExpression = node.name.expression;
-                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
-                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
-                        return nameExpression.text;
-                    }
-                    return undefined;
-                }
-                return node.name.text;
-            }
-            function getPropertySymbolsFromContextualType(node) {
-                var objectLiteral = node.parent;
-                var contextualType = typeChecker.getContextualType(objectLiteral);
-                var name = getNameFromObjectLiteralElement(node);
-                if (name && contextualType) {
-                    var result_5 = [];
-                    var symbol_1 = contextualType.getProperty(name);
-                    if (symbol_1) {
-                        result_5.push(symbol_1);
-                    }
-                    if (contextualType.flags & 16384 /* Union */) {
-                        ts.forEach(contextualType.types, function (t) {
-                            var symbol = t.getProperty(name);
-                            if (symbol) {
-                                result_5.push(symbol);
-                            }
-                        });
-                    }
-                    return result_5;
-                }
-                return undefined;
-            }
-            /** Given an initial searchMeaning, extracted from a location, widen the search scope based on the declarations
-              * of the corresponding symbol. e.g. if we are searching for "Foo" in value position, but "Foo" references a class
-              * then we need to widen the search to include type positions as well.
-              * On the contrary, if we are searching for "Bar" in type position and we trace bar to an interface, and an uninstantiated
-              * module, we want to keep the search limited to only types, as the two declarations (interface and uninstantiated module)
-              * do not intersect in any of the three spaces.
-              */
-            function getIntersectingMeaningFromDeclarations(meaning, declarations) {
-                if (declarations) {
-                    var lastIterationMeaning = void 0;
-                    do {
-                        // The result is order-sensitive, for instance if initialMeaning === Namespace, and declarations = [class, instantiated module]
-                        // we need to consider both as they initialMeaning intersects with the module in the namespace space, and the module
-                        // intersects with the class in the value space.
-                        // To achieve that we will keep iterating until the result stabilizes.
-                        // Remember the last meaning
-                        lastIterationMeaning = meaning;
-                        for (var _i = 0, declarations_10 = declarations; _i < declarations_10.length; _i++) {
-                            var declaration = declarations_10[_i];
-                            var declarationMeaning = getMeaningFromDeclaration(declaration);
-                            if (declarationMeaning & meaning) {
-                                meaning |= declarationMeaning;
-                            }
-                        }
-                    } while (meaning !== lastIterationMeaning);
-                }
-                return meaning;
-            }
-        }
-        function getReferenceEntryFromNode(node) {
-            var start = node.getStart();
-            var end = node.getEnd();
-            if (node.kind === 9 /* StringLiteral */) {
-                start += 1;
-                end -= 1;
-            }
-            return {
-                fileName: node.getSourceFile().fileName,
-                textSpan: ts.createTextSpanFromBounds(start, end),
-                isWriteAccess: isWriteAccess(node)
-            };
-        }
-        /** A node is considered a writeAccess iff it is a name of a declaration or a target of an assignment */
-        function isWriteAccess(node) {
-            if (node.kind === 69 /* Identifier */ && ts.isDeclarationName(node)) {
-                return true;
-            }
-            var parent = node.parent;
-            if (parent) {
-                if (parent.kind === 186 /* PostfixUnaryExpression */ || parent.kind === 185 /* PrefixUnaryExpression */) {
-                    return true;
-                }
-                else if (parent.kind === 187 /* BinaryExpression */ && parent.left === node) {
-                    var operator = parent.operatorToken.kind;
-                    return 56 /* FirstAssignment */ <= operator && operator <= 68 /* LastAssignment */;
-                }
-            }
-            return false;
-        }
-        /// NavigateTo
-        function getNavigateToItems(searchValue, maxResultCount) {
-            synchronizeHostData();
-            var checker = getProgram().getTypeChecker();
-            return ts.NavigateTo.getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount);
-        }
-        function getEmitOutput(fileName) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var outputFiles = [];
-            function writeFile(fileName, data, writeByteOrderMark) {
-                outputFiles.push({
-                    name: fileName,
-                    writeByteOrderMark: writeByteOrderMark,
-                    text: data
-                });
-            }
-            var emitOutput = program.emit(sourceFile, writeFile, cancellationToken);
-            return {
-                outputFiles: outputFiles,
-                emitSkipped: emitOutput.emitSkipped
-            };
-        }
-        function getMeaningFromDeclaration(node) {
-            switch (node.kind) {
-                case 142 /* Parameter */:
-                case 218 /* VariableDeclaration */:
-                case 169 /* BindingElement */:
-                case 145 /* PropertyDeclaration */:
-                case 144 /* PropertySignature */:
-                case 253 /* PropertyAssignment */:
-                case 254 /* ShorthandPropertyAssignment */:
-                case 255 /* EnumMember */:
-                case 147 /* MethodDeclaration */:
-                case 146 /* MethodSignature */:
-                case 148 /* Constructor */:
-                case 149 /* GetAccessor */:
-                case 150 /* SetAccessor */:
-                case 220 /* FunctionDeclaration */:
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                case 252 /* CatchClause */:
-                    return 1 /* Value */;
-                case 141 /* TypeParameter */:
-                case 222 /* InterfaceDeclaration */:
-                case 223 /* TypeAliasDeclaration */:
-                case 159 /* TypeLiteral */:
-                    return 2 /* Type */;
-                case 221 /* ClassDeclaration */:
-                case 224 /* EnumDeclaration */:
-                    return 1 /* Value */ | 2 /* Type */;
-                case 225 /* ModuleDeclaration */:
-                    if (ts.isAmbientModule(node)) {
-                        return 4 /* Namespace */ | 1 /* Value */;
-                    }
-                    else if (ts.getModuleInstanceState(node) === 1 /* Instantiated */) {
-                        return 4 /* Namespace */ | 1 /* Value */;
-                    }
-                    else {
-                        return 4 /* Namespace */;
-                    }
-                case 233 /* NamedImports */:
-                case 234 /* ImportSpecifier */:
-                case 229 /* ImportEqualsDeclaration */:
-                case 230 /* ImportDeclaration */:
-                case 235 /* ExportAssignment */:
-                case 236 /* ExportDeclaration */:
-                    return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
-                // An external module can be a Value
-                case 256 /* SourceFile */:
-                    return 4 /* Namespace */ | 1 /* Value */;
-            }
-            return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
-        }
-        function isTypeReference(node) {
-            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(node)) {
-                node = node.parent;
-            }
-            return node.parent.kind === 155 /* TypeReference */ ||
-                (node.parent.kind === 194 /* ExpressionWithTypeArguments */ && !ts.isExpressionWithTypeArgumentsInClassExtendsClause(node.parent)) ||
-                (node.kind === 97 /* ThisKeyword */ && !ts.isExpression(node)) ||
-                node.kind === 165 /* ThisType */;
-        }
-        function isNamespaceReference(node) {
-            return isQualifiedNameNamespaceReference(node) || isPropertyAccessNamespaceReference(node);
-        }
-        function isPropertyAccessNamespaceReference(node) {
-            var root = node;
-            var isLastClause = true;
-            if (root.parent.kind === 172 /* PropertyAccessExpression */) {
-                while (root.parent && root.parent.kind === 172 /* PropertyAccessExpression */) {
-                    root = root.parent;
-                }
-                isLastClause = root.name === node;
-            }
-            if (!isLastClause && root.parent.kind === 194 /* ExpressionWithTypeArguments */ && root.parent.parent.kind === 251 /* HeritageClause */) {
-                var decl = root.parent.parent.parent;
-                return (decl.kind === 221 /* ClassDeclaration */ && root.parent.parent.token === 106 /* ImplementsKeyword */) ||
-                    (decl.kind === 222 /* InterfaceDeclaration */ && root.parent.parent.token === 83 /* ExtendsKeyword */);
-            }
-            return false;
-        }
-        function isQualifiedNameNamespaceReference(node) {
-            var root = node;
-            var isLastClause = true;
-            if (root.parent.kind === 139 /* QualifiedName */) {
-                while (root.parent && root.parent.kind === 139 /* QualifiedName */) {
-                    root = root.parent;
-                }
-                isLastClause = root.right === node;
-            }
-            return root.parent.kind === 155 /* TypeReference */ && !isLastClause;
-        }
-        function isInRightSideOfImport(node) {
-            while (node.parent.kind === 139 /* QualifiedName */) {
-                node = node.parent;
-            }
-            return ts.isInternalModuleImportEqualsDeclaration(node.parent) && node.parent.moduleReference === node;
-        }
-        function getMeaningFromRightHandSideOfImportEquals(node) {
-            ts.Debug.assert(node.kind === 69 /* Identifier */);
-            //     import a = |b|; // Namespace
-            //     import a = |b.c|; // Value, type, namespace
-            //     import a = |b.c|.d; // Namespace
-            if (node.parent.kind === 139 /* QualifiedName */ &&
-                node.parent.right === node &&
-                node.parent.parent.kind === 229 /* ImportEqualsDeclaration */) {
-                return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
-            }
-            return 4 /* Namespace */;
-        }
-        function getMeaningFromLocation(node) {
-            if (node.parent.kind === 235 /* ExportAssignment */) {
-                return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
-            }
-            else if (isInRightSideOfImport(node)) {
-                return getMeaningFromRightHandSideOfImportEquals(node);
-            }
-            else if (ts.isDeclarationName(node)) {
-                return getMeaningFromDeclaration(node.parent);
-            }
-            else if (isTypeReference(node)) {
-                return 2 /* Type */;
-            }
-            else if (isNamespaceReference(node)) {
-                return 4 /* Namespace */;
-            }
-            else {
-                return 1 /* Value */;
-            }
-        }
-        // Signature help
-        /**
-         * This is a semantic operation.
-         */
-        function getSignatureHelpItems(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            return ts.SignatureHelp.getSignatureHelpItems(program, sourceFile, position, cancellationToken);
-        }
-        /// Syntactic features
-        function getNonBoundSourceFile(fileName) {
-            return syntaxTreeCache.getCurrentSourceFile(fileName);
-        }
-        function getNameOrDottedNameSpan(fileName, startPos, endPos) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            // Get node at the location
-            var node = ts.getTouchingPropertyName(sourceFile, startPos);
-            if (node === sourceFile) {
-                return;
-            }
-            switch (node.kind) {
-                case 172 /* PropertyAccessExpression */:
-                case 139 /* QualifiedName */:
-                case 9 /* StringLiteral */:
-                case 166 /* StringLiteralType */:
-                case 84 /* FalseKeyword */:
-                case 99 /* TrueKeyword */:
-                case 93 /* NullKeyword */:
-                case 95 /* SuperKeyword */:
-                case 97 /* ThisKeyword */:
-                case 165 /* ThisType */:
-                case 69 /* Identifier */:
-                    break;
-                // Cant create the text span
-                default:
-                    return;
-            }
-            var nodeForStartPos = node;
-            while (true) {
-                if (isRightSideOfPropertyAccess(nodeForStartPos) || isRightSideOfQualifiedName(nodeForStartPos)) {
-                    // If on the span is in right side of the the property or qualified name, return the span from the qualified name pos to end of this node
-                    nodeForStartPos = nodeForStartPos.parent;
-                }
-                else if (isNameOfModuleDeclaration(nodeForStartPos)) {
-                    // If this is name of a module declarations, check if this is right side of dotted module name
-                    // If parent of the module declaration which is parent of this node is module declaration and its body is the module declaration that this node is name of
-                    // Then this name is name from dotted module
-                    if (nodeForStartPos.parent.parent.kind === 225 /* ModuleDeclaration */ &&
-                        nodeForStartPos.parent.parent.body === nodeForStartPos.parent) {
-                        // Use parent module declarations name for start pos
-                        nodeForStartPos = nodeForStartPos.parent.parent.name;
-                    }
-                    else {
-                        // We have to use this name for start pos
-                        break;
-                    }
-                }
-                else {
-                    // Is not a member expression so we have found the node for start pos
-                    break;
-                }
-            }
-            return ts.createTextSpanFromBounds(nodeForStartPos.getStart(), node.getEnd());
-        }
-        function getBreakpointStatementAtPosition(fileName, position) {
-            // doesn't use compiler - no need to synchronize with host
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.BreakpointResolver.spanInSourceFileAtLocation(sourceFile, position);
-        }
-        function getNavigationBarItems(fileName) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.NavigationBar.getNavigationBarItems(sourceFile, host.getCompilationSettings());
-        }
-        function getSemanticClassifications(fileName, span) {
-            return convertClassifications(getEncodedSemanticClassifications(fileName, span));
-        }
-        function checkForClassificationCancellation(kind) {
-            // We don't want to actually call back into our host on every node to find out if we've
-            // been canceled.  That would be an enormous amount of chattyness, along with the all
-            // the overhead of marshalling the data to/from the host.  So instead we pick a few
-            // reasonable node kinds to bother checking on.  These node kinds represent high level
-            // constructs that we would expect to see commonly, but just at a far less frequent
-            // interval.
-            //
-            // For example, in checker.ts (around 750k) we only have around 600 of these constructs.
-            // That means we're calling back into the host around every 1.2k of the file we process.
-            // Lib.d.ts has similar numbers.
-            switch (kind) {
-                case 225 /* ModuleDeclaration */:
-                case 221 /* ClassDeclaration */:
-                case 222 /* InterfaceDeclaration */:
-                case 220 /* FunctionDeclaration */:
-                    cancellationToken.throwIfCancellationRequested();
-            }
-        }
-        function getEncodedSemanticClassifications(fileName, span) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var typeChecker = program.getTypeChecker();
-            var result = [];
-            var classifiableNames = program.getClassifiableNames();
-            processNode(sourceFile);
-            return { spans: result, endOfLineState: 0 /* None */ };
-            function pushClassification(start, length, type) {
-                result.push(start);
-                result.push(length);
-                result.push(type);
-            }
-            function classifySymbol(symbol, meaningAtPosition) {
-                var flags = symbol.getFlags();
-                if ((flags & 788448 /* Classifiable */) === 0 /* None */) {
-                    return;
-                }
-                if (flags & 32 /* Class */) {
-                    return 11 /* className */;
-                }
-                else if (flags & 384 /* Enum */) {
-                    return 12 /* enumName */;
-                }
-                else if (flags & 524288 /* TypeAlias */) {
-                    return 16 /* typeAliasName */;
-                }
-                else if (meaningAtPosition & 2 /* Type */) {
-                    if (flags & 64 /* Interface */) {
-                        return 13 /* interfaceName */;
-                    }
-                    else if (flags & 262144 /* TypeParameter */) {
-                        return 15 /* typeParameterName */;
-                    }
-                }
-                else if (flags & 1536 /* Module */) {
-                    // Only classify a module as such if
-                    //  - It appears in a namespace context.
-                    //  - There exists a module declaration which actually impacts the value side.
-                    if (meaningAtPosition & 4 /* Namespace */ ||
-                        (meaningAtPosition & 1 /* Value */ && hasValueSideModule(symbol))) {
-                        return 14 /* moduleName */;
-                    }
-                }
-                return undefined;
-                /**
-                 * Returns true if there exists a module that introduces entities on the value side.
-                 */
-                function hasValueSideModule(symbol) {
-                    return ts.forEach(symbol.declarations, function (declaration) {
-                        return declaration.kind === 225 /* ModuleDeclaration */ &&
-                            ts.getModuleInstanceState(declaration) === 1 /* Instantiated */;
-                    });
-                }
-            }
-            function processNode(node) {
-                // Only walk into nodes that intersect the requested span.
-                if (node && ts.textSpanIntersectsWith(span, node.getFullStart(), node.getFullWidth())) {
-                    var kind = node.kind;
-                    checkForClassificationCancellation(kind);
-                    if (kind === 69 /* Identifier */ && !ts.nodeIsMissing(node)) {
-                        var identifier = node;
-                        // Only bother calling into the typechecker if this is an identifier that
-                        // could possibly resolve to a type name.  This makes classification run
-                        // in a third of the time it would normally take.
-                        if (classifiableNames[identifier.text]) {
-                            var symbol = typeChecker.getSymbolAtLocation(node);
-                            if (symbol) {
-                                var type = classifySymbol(symbol, getMeaningFromLocation(node));
-                                if (type) {
-                                    pushClassification(node.getStart(), node.getWidth(), type);
-                                }
-                            }
-                        }
-                    }
-                    ts.forEachChild(node, processNode);
-                }
-            }
-        }
-        function getClassificationTypeName(type) {
-            switch (type) {
-                case 1 /* comment */: return ClassificationTypeNames.comment;
-                case 2 /* identifier */: return ClassificationTypeNames.identifier;
-                case 3 /* keyword */: return ClassificationTypeNames.keyword;
-                case 4 /* numericLiteral */: return ClassificationTypeNames.numericLiteral;
-                case 5 /* operator */: return ClassificationTypeNames.operator;
-                case 6 /* stringLiteral */: return ClassificationTypeNames.stringLiteral;
-                case 8 /* whiteSpace */: return ClassificationTypeNames.whiteSpace;
-                case 9 /* text */: return ClassificationTypeNames.text;
-                case 10 /* punctuation */: return ClassificationTypeNames.punctuation;
-                case 11 /* className */: return ClassificationTypeNames.className;
-                case 12 /* enumName */: return ClassificationTypeNames.enumName;
-                case 13 /* interfaceName */: return ClassificationTypeNames.interfaceName;
-                case 14 /* moduleName */: return ClassificationTypeNames.moduleName;
-                case 15 /* typeParameterName */: return ClassificationTypeNames.typeParameterName;
-                case 16 /* typeAliasName */: return ClassificationTypeNames.typeAliasName;
-                case 17 /* parameterName */: return ClassificationTypeNames.parameterName;
-                case 18 /* docCommentTagName */: return ClassificationTypeNames.docCommentTagName;
-                case 19 /* jsxOpenTagName */: return ClassificationTypeNames.jsxOpenTagName;
-                case 20 /* jsxCloseTagName */: return ClassificationTypeNames.jsxCloseTagName;
-                case 21 /* jsxSelfClosingTagName */: return ClassificationTypeNames.jsxSelfClosingTagName;
-                case 22 /* jsxAttribute */: return ClassificationTypeNames.jsxAttribute;
-                case 23 /* jsxText */: return ClassificationTypeNames.jsxText;
-                case 24 /* jsxAttributeStringLiteralValue */: return ClassificationTypeNames.jsxAttributeStringLiteralValue;
-            }
-        }
-        function convertClassifications(classifications) {
-            ts.Debug.assert(classifications.spans.length % 3 === 0);
-            var dense = classifications.spans;
-            var result = [];
-            for (var i = 0, n = dense.length; i < n; i += 3) {
-                result.push({
-                    textSpan: ts.createTextSpan(dense[i], dense[i + 1]),
-                    classificationType: getClassificationTypeName(dense[i + 2])
-                });
-            }
-            return result;
-        }
-        function getSyntacticClassifications(fileName, span) {
-            return convertClassifications(getEncodedSyntacticClassifications(fileName, span));
-        }
-        function getEncodedSyntacticClassifications(fileName, span) {
-            // doesn't use compiler - no need to synchronize with host
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            var spanStart = span.start;
-            var spanLength = span.length;
-            // Make a scanner we can get trivia from.
-            var triviaScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
-            var mergeConflictScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
-            var result = [];
-            processElement(sourceFile);
-            return { spans: result, endOfLineState: 0 /* None */ };
-            function pushClassification(start, length, type) {
-                result.push(start);
-                result.push(length);
-                result.push(type);
-            }
-            function classifyLeadingTriviaAndGetTokenStart(token) {
-                triviaScanner.setTextPos(token.pos);
-                while (true) {
-                    var start = triviaScanner.getTextPos();
-                    // only bother scanning if we have something that could be trivia.
-                    if (!ts.couldStartTrivia(sourceFile.text, start)) {
-                        return start;
-                    }
-                    var kind = triviaScanner.scan();
-                    var end = triviaScanner.getTextPos();
-                    var width = end - start;
-                    // The moment we get something that isn't trivia, then stop processing.
-                    if (!ts.isTrivia(kind)) {
-                        return start;
-                    }
-                    // Don't bother with newlines/whitespace.
-                    if (kind === 4 /* NewLineTrivia */ || kind === 5 /* WhitespaceTrivia */) {
-                        continue;
-                    }
-                    // Only bother with the trivia if it at least intersects the span of interest.
-                    if (ts.isComment(kind)) {
-                        classifyComment(token, kind, start, width);
-                        // Classifying a comment might cause us to reuse the trivia scanner
-                        // (because of jsdoc comments).  So after we classify the comment make
-                        // sure we set the scanner position back to where it needs to be.
-                        triviaScanner.setTextPos(end);
-                        continue;
-                    }
-                    if (kind === 7 /* ConflictMarkerTrivia */) {
-                        var text = sourceFile.text;
-                        var ch = text.charCodeAt(start);
-                        // for the <<<<<<< and >>>>>>> markers, we just add them in as comments
-                        // in the classification stream.
-                        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
-                            pushClassification(start, width, 1 /* comment */);
-                            continue;
-                        }
-                        // for the ======== add a comment for the first line, and then lex all
-                        // subsequent lines up until the end of the conflict marker.
-                        ts.Debug.assert(ch === 61 /* equals */);
-                        classifyDisabledMergeCode(text, start, end);
-                    }
-                }
-            }
-            function classifyComment(token, kind, start, width) {
-                if (kind === 3 /* MultiLineCommentTrivia */) {
-                    // See if this is a doc comment.  If so, we'll classify certain portions of it
-                    // specially.
-                    var docCommentAndDiagnostics = ts.parseIsolatedJSDocComment(sourceFile.text, start, width);
-                    if (docCommentAndDiagnostics && docCommentAndDiagnostics.jsDocComment) {
-                        docCommentAndDiagnostics.jsDocComment.parent = token;
-                        classifyJSDocComment(docCommentAndDiagnostics.jsDocComment);
-                        return;
-                    }
-                }
-                // Simple comment.  Just add as is.
-                pushCommentRange(start, width);
-            }
-            function pushCommentRange(start, width) {
-                pushClassification(start, width, 1 /* comment */);
-            }
-            function classifyJSDocComment(docComment) {
-                var pos = docComment.pos;
-                for (var _i = 0, _a = docComment.tags; _i < _a.length; _i++) {
-                    var tag = _a[_i];
-                    // As we walk through each tag, classify the portion of text from the end of
-                    // the last tag (or the start of the entire doc comment) as 'comment'.
-                    if (tag.pos !== pos) {
-                        pushCommentRange(pos, tag.pos - pos);
-                    }
-                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, 10 /* punctuation */);
-                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, 18 /* docCommentTagName */);
-                    pos = tag.tagName.end;
-                    switch (tag.kind) {
-                        case 275 /* JSDocParameterTag */:
-                            processJSDocParameterTag(tag);
-                            break;
-                        case 278 /* JSDocTemplateTag */:
-                            processJSDocTemplateTag(tag);
-                            break;
-                        case 277 /* JSDocTypeTag */:
-                            processElement(tag.typeExpression);
-                            break;
-                        case 276 /* JSDocReturnTag */:
-                            processElement(tag.typeExpression);
-                            break;
-                    }
-                    pos = tag.end;
-                }
-                if (pos !== docComment.end) {
-                    pushCommentRange(pos, docComment.end - pos);
-                }
-                return;
-                function processJSDocParameterTag(tag) {
-                    if (tag.preParameterName) {
-                        pushCommentRange(pos, tag.preParameterName.pos - pos);
-                        pushClassification(tag.preParameterName.pos, tag.preParameterName.end - tag.preParameterName.pos, 17 /* parameterName */);
-                        pos = tag.preParameterName.end;
-                    }
-                    if (tag.typeExpression) {
-                        pushCommentRange(pos, tag.typeExpression.pos - pos);
-                        processElement(tag.typeExpression);
-                        pos = tag.typeExpression.end;
-                    }
-                    if (tag.postParameterName) {
-                        pushCommentRange(pos, tag.postParameterName.pos - pos);
-                        pushClassification(tag.postParameterName.pos, tag.postParameterName.end - tag.postParameterName.pos, 17 /* parameterName */);
-                        pos = tag.postParameterName.end;
-                    }
-                }
-            }
-            function processJSDocTemplateTag(tag) {
-                for (var _i = 0, _a = tag.getChildren(); _i < _a.length; _i++) {
-                    var child = _a[_i];
-                    processElement(child);
-                }
-            }
-            function classifyDisabledMergeCode(text, start, end) {
-                // Classify the line that the ======= marker is on as a comment.  Then just lex
-                // all further tokens and add them to the result.
-                var i;
-                for (i = start; i < end; i++) {
-                    if (ts.isLineBreak(text.charCodeAt(i))) {
-                        break;
-                    }
-                }
-                pushClassification(start, i - start, 1 /* comment */);
-                mergeConflictScanner.setTextPos(i);
-                while (mergeConflictScanner.getTextPos() < end) {
-                    classifyDisabledCodeToken();
-                }
-            }
-            function classifyDisabledCodeToken() {
-                var start = mergeConflictScanner.getTextPos();
-                var tokenKind = mergeConflictScanner.scan();
-                var end = mergeConflictScanner.getTextPos();
-                var type = classifyTokenType(tokenKind);
-                if (type) {
-                    pushClassification(start, end - start, type);
-                }
-            }
-            /**
-             * Returns true if node should be treated as classified and no further processing is required.
-             * False will mean that node is not classified and traverse routine should recurse into node contents.
-             */
-            function tryClassifyNode(node) {
-                if (ts.nodeIsMissing(node)) {
-                    return true;
-                }
-                var classifiedElementName = tryClassifyJsxElementName(node);
-                if (!ts.isToken(node) && node.kind !== 244 /* JsxText */ && classifiedElementName === undefined) {
-                    return false;
-                }
-                var tokenStart = node.kind === 244 /* JsxText */ ? node.pos : classifyLeadingTriviaAndGetTokenStart(node);
-                var tokenWidth = node.end - tokenStart;
-                ts.Debug.assert(tokenWidth >= 0);
-                if (tokenWidth > 0) {
-                    var type = classifiedElementName || classifyTokenType(node.kind, node);
-                    if (type) {
-                        pushClassification(tokenStart, tokenWidth, type);
-                    }
-                }
-                return true;
-            }
-            function tryClassifyJsxElementName(token) {
-                switch (token.parent && token.parent.kind) {
-                    case 243 /* JsxOpeningElement */:
-                        if (token.parent.tagName === token) {
-                            return 19 /* jsxOpenTagName */;
-                        }
-                        break;
-                    case 245 /* JsxClosingElement */:
-                        if (token.parent.tagName === token) {
-                            return 20 /* jsxCloseTagName */;
-                        }
-                        break;
-                    case 242 /* JsxSelfClosingElement */:
-                        if (token.parent.tagName === token) {
-                            return 21 /* jsxSelfClosingTagName */;
-                        }
-                        break;
-                    case 246 /* JsxAttribute */:
-                        if (token.parent.name === token) {
-                            return 22 /* jsxAttribute */;
-                        }
-                        break;
-                }
-                return undefined;
-            }
-            // for accurate classification, the actual token should be passed in.  however, for
-            // cases like 'disabled merge code' classification, we just get the token kind and
-            // classify based on that instead.
-            function classifyTokenType(tokenKind, token) {
-                if (ts.isKeyword(tokenKind)) {
-                    return 3 /* keyword */;
-                }
-                // Special case < and >  If they appear in a generic context they are punctuation,
-                // not operators.
-                if (tokenKind === 25 /* LessThanToken */ || tokenKind === 27 /* GreaterThanToken */) {
-                    // If the node owning the token has a type argument list or type parameter list, then
-                    // we can effectively assume that a '<' and '>' belong to those lists.
-                    if (token && ts.getTypeArgumentOrTypeParameterList(token.parent)) {
-                        return 10 /* punctuation */;
-                    }
-                }
-                if (ts.isPunctuation(tokenKind)) {
-                    if (token) {
-                        if (tokenKind === 56 /* EqualsToken */) {
-                            // the '=' in a variable declaration is special cased here.
-                            if (token.parent.kind === 218 /* VariableDeclaration */ ||
-                                token.parent.kind === 145 /* PropertyDeclaration */ ||
-                                token.parent.kind === 142 /* Parameter */ ||
-                                token.parent.kind === 246 /* JsxAttribute */) {
-                                return 5 /* operator */;
-                            }
-                        }
-                        if (token.parent.kind === 187 /* BinaryExpression */ ||
-                            token.parent.kind === 185 /* PrefixUnaryExpression */ ||
-                            token.parent.kind === 186 /* PostfixUnaryExpression */ ||
-                            token.parent.kind === 188 /* ConditionalExpression */) {
-                            return 5 /* operator */;
-                        }
-                    }
-                    return 10 /* punctuation */;
-                }
-                else if (tokenKind === 8 /* NumericLiteral */) {
-                    return 4 /* numericLiteral */;
-                }
-                else if (tokenKind === 9 /* StringLiteral */ || tokenKind === 166 /* StringLiteralType */) {
-                    return token.parent.kind === 246 /* JsxAttribute */ ? 24 /* jsxAttributeStringLiteralValue */ : 6 /* stringLiteral */;
-                }
-                else if (tokenKind === 10 /* RegularExpressionLiteral */) {
-                    // TODO: we should get another classification type for these literals.
-                    return 6 /* stringLiteral */;
-                }
-                else if (ts.isTemplateLiteralKind(tokenKind)) {
-                    // TODO (drosen): we should *also* get another classification type for these literals.
-                    return 6 /* stringLiteral */;
-                }
-                else if (tokenKind === 244 /* JsxText */) {
-                    return 23 /* jsxText */;
-                }
-                else if (tokenKind === 69 /* Identifier */) {
-                    if (token) {
-                        switch (token.parent.kind) {
-                            case 221 /* ClassDeclaration */:
-                                if (token.parent.name === token) {
-                                    return 11 /* className */;
-                                }
-                                return;
-                            case 141 /* TypeParameter */:
-                                if (token.parent.name === token) {
-                                    return 15 /* typeParameterName */;
-                                }
-                                return;
-                            case 222 /* InterfaceDeclaration */:
-                                if (token.parent.name === token) {
-                                    return 13 /* interfaceName */;
-                                }
-                                return;
-                            case 224 /* EnumDeclaration */:
-                                if (token.parent.name === token) {
-                                    return 12 /* enumName */;
-                                }
-                                return;
-                            case 225 /* ModuleDeclaration */:
-                                if (token.parent.name === token) {
-                                    return 14 /* moduleName */;
-                                }
-                                return;
-                            case 142 /* Parameter */:
-                                if (token.parent.name === token) {
-                                    return 17 /* parameterName */;
-                                }
-                                return;
-                        }
-                    }
-                    return 2 /* identifier */;
-                }
-            }
-            function processElement(element) {
-                if (!element) {
-                    return;
-                }
-                // Ignore nodes that don't intersect the original span to classify.
-                if (ts.decodedTextSpanIntersectsWith(spanStart, spanLength, element.pos, element.getFullWidth())) {
-                    checkForClassificationCancellation(element.kind);
-                    var children = element.getChildren(sourceFile);
-                    for (var i = 0, n = children.length; i < n; i++) {
-                        var child = children[i];
-                        if (!tryClassifyNode(child)) {
-                            // Recurse into our child nodes.
-                            processElement(child);
-                        }
-                    }
-                }
-            }
-        }
-        function getOutliningSpans(fileName) {
-            // doesn't use compiler - no need to synchronize with host
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.OutliningElementsCollector.collectElements(sourceFile);
-        }
-        function getBraceMatchingAtPosition(fileName, position) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            var result = [];
-            var token = ts.getTouchingToken(sourceFile, position);
-            if (token.getStart(sourceFile) === position) {
-                var matchKind = getMatchingTokenKind(token);
-                // Ensure that there is a corresponding token to match ours.
-                if (matchKind) {
-                    var parentElement = token.parent;
-                    var childNodes = parentElement.getChildren(sourceFile);
-                    for (var _i = 0, childNodes_1 = childNodes; _i < childNodes_1.length; _i++) {
-                        var current = childNodes_1[_i];
-                        if (current.kind === matchKind) {
-                            var range1 = ts.createTextSpan(token.getStart(sourceFile), token.getWidth(sourceFile));
-                            var range2 = ts.createTextSpan(current.getStart(sourceFile), current.getWidth(sourceFile));
-                            // We want to order the braces when we return the result.
-                            if (range1.start < range2.start) {
-                                result.push(range1, range2);
-                            }
-                            else {
-                                result.push(range2, range1);
-                            }
-                            break;
-                        }
-                    }
-                }
-            }
-            return result;
-            function getMatchingTokenKind(token) {
-                switch (token.kind) {
-                    case 15 /* OpenBraceToken */: return 16 /* CloseBraceToken */;
-                    case 17 /* OpenParenToken */: return 18 /* CloseParenToken */;
-                    case 19 /* OpenBracketToken */: return 20 /* CloseBracketToken */;
-                    case 25 /* LessThanToken */: return 27 /* GreaterThanToken */;
-                    case 16 /* CloseBraceToken */: return 15 /* OpenBraceToken */;
-                    case 18 /* CloseParenToken */: return 17 /* OpenParenToken */;
-                    case 20 /* CloseBracketToken */: return 19 /* OpenBracketToken */;
-                    case 27 /* GreaterThanToken */: return 25 /* LessThanToken */;
-                }
-                return undefined;
-            }
-        }
-        function getIndentationAtPosition(fileName, position, editorOptions) {
-            var start = new Date().getTime();
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            log("getIndentationAtPosition: getCurrentSourceFile: " + (new Date().getTime() - start));
-            start = new Date().getTime();
-            var result = ts.formatting.SmartIndenter.getIndentation(position, sourceFile, editorOptions);
-            log("getIndentationAtPosition: computeIndentation  : " + (new Date().getTime() - start));
-            return result;
-        }
-        function getFormattingEditsForRange(fileName, start, end, options) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.formatting.formatSelection(start, end, sourceFile, getRuleProvider(options), options);
-        }
-        function getFormattingEditsForDocument(fileName, options) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            return ts.formatting.formatDocument(sourceFile, getRuleProvider(options), options);
-        }
-        function getFormattingEditsAfterKeystroke(fileName, position, key, options) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            if (key === "}") {
-                return ts.formatting.formatOnClosingCurly(position, sourceFile, getRuleProvider(options), options);
-            }
-            else if (key === ";") {
-                return ts.formatting.formatOnSemicolon(position, sourceFile, getRuleProvider(options), options);
-            }
-            else if (key === "\n") {
-                return ts.formatting.formatOnEnter(position, sourceFile, getRuleProvider(options), options);
-            }
-            return [];
-        }
-        /**
-         * Checks if position points to a valid position to add JSDoc comments, and if so,
-         * returns the appropriate template. Otherwise returns an empty string.
-         * Valid positions are
-         *      - outside of comments, statements, and expressions, and
-         *      - preceding a:
-         *          - function/constructor/method declaration
-         *          - class declarations
-         *          - variable statements
-         *          - namespace declarations
-         *
-         * Hosts should ideally check that:
-         * - The line is all whitespace up to 'position' before performing the insertion.
-         * - If the keystroke sequence "/\*\*" induced the call, we also check that the next
-         * non-whitespace character is '*', which (approximately) indicates whether we added
-         * the second '*' to complete an existing (JSDoc) comment.
-         * @param fileName The file in which to perform the check.
-         * @param position The (character-indexed) position in the file where the check should
-         * be performed.
-         */
-        function getDocCommentTemplateAtPosition(fileName, position) {
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            // Check if in a context where we don't want to perform any insertion
-            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position) || ts.hasDocComment(sourceFile, position)) {
-                return undefined;
-            }
-            var tokenAtPos = ts.getTokenAtPosition(sourceFile, position);
-            var tokenStart = tokenAtPos.getStart();
-            if (!tokenAtPos || tokenStart < position) {
-                return undefined;
-            }
-            // TODO: add support for:
-            // - enums/enum members
-            // - interfaces
-            // - property declarations
-            // - potentially property assignments
-            var commentOwner;
-            findOwner: for (commentOwner = tokenAtPos; commentOwner; commentOwner = commentOwner.parent) {
-                switch (commentOwner.kind) {
-                    case 220 /* FunctionDeclaration */:
-                    case 147 /* MethodDeclaration */:
-                    case 148 /* Constructor */:
-                    case 221 /* ClassDeclaration */:
-                    case 200 /* VariableStatement */:
-                        break findOwner;
-                    case 256 /* SourceFile */:
-                        return undefined;
-                    case 225 /* ModuleDeclaration */:
-                        // If in walking up the tree, we hit a a nested namespace declaration,
-                        // then we must be somewhere within a dotted namespace name; however we don't
-                        // want to give back a JSDoc template for the 'b' or 'c' in 'namespace a.b.c { }'.
-                        if (commentOwner.parent.kind === 225 /* ModuleDeclaration */) {
-                            return undefined;
-                        }
-                        break findOwner;
-                }
-            }
-            if (!commentOwner || commentOwner.getStart() < position) {
-                return undefined;
-            }
-            var parameters = getParametersForJsDocOwningNode(commentOwner);
-            var posLineAndChar = sourceFile.getLineAndCharacterOfPosition(position);
-            var lineStart = sourceFile.getLineStarts()[posLineAndChar.line];
-            var indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character);
-            var newLine = ts.getNewLineOrDefaultFromHost(host);
-            var docParams = "";
-            for (var i = 0, numParams = parameters.length; i < numParams; i++) {
-                var currentName = parameters[i].name;
-                var paramName = currentName.kind === 69 /* Identifier */ ?
-                    currentName.text :
-                    "param" + i;
-                docParams += indentationStr + " * @param " + paramName + newLine;
-            }
-            // A doc comment consists of the following
-            // * The opening comment line
-            // * the first line (without a param) for the object's untagged info (this is also where the caret ends up)
-            // * the '@param'-tagged lines
-            // * TODO: other tags.
-            // * the closing comment line
-            // * if the caret was directly in front of the object, then we add an extra line and indentation.
-            var preamble = "/**" + newLine +
-                indentationStr + " * ";
-            var result = preamble + newLine +
-                docParams +
-                indentationStr + " */" +
-                (tokenStart === position ? newLine + indentationStr : "");
-            return { newText: result, caretOffset: preamble.length };
-        }
-        function isValidBraceCompletionAtPostion(fileName, position, openingBrace) {
-            // '<' is currently not supported, figuring out if we're in a Generic Type vs. a comparison is too 
-            // expensive to do during typing scenarios
-            // i.e. whether we're dealing with:
-            //      var x = new foo<| ( with class foo<T>{} )
-            // or 
-            //      var y = 3 <|
-            if (openingBrace === 60 /* lessThan */) {
-                return false;
-            }
-            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
-            // Check if in a context where we don't want to perform any insertion
-            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position)) {
-                return false;
-            }
-            if (ts.isInsideJsxElementOrAttribute(sourceFile, position)) {
-                return openingBrace === 123 /* openBrace */;
-            }
-            if (ts.isInTemplateString(sourceFile, position)) {
-                return false;
-            }
-            return true;
-        }
-        function getParametersForJsDocOwningNode(commentOwner) {
-            if (ts.isFunctionLike(commentOwner)) {
-                return commentOwner.parameters;
-            }
-            if (commentOwner.kind === 200 /* VariableStatement */) {
-                var varStatement = commentOwner;
-                var varDeclarations = varStatement.declarationList.declarations;
-                if (varDeclarations.length === 1 && varDeclarations[0].initializer) {
-                    return getParametersFromRightHandSideOfAssignment(varDeclarations[0].initializer);
-                }
-            }
-            return emptyArray;
-        }
-        /**
-         * Digs into an an initializer or RHS operand of an assignment operation
-         * to get the parameters of an apt signature corresponding to a
-         * function expression or a class expression.
-         *
-         * @param rightHandSide the expression which may contain an appropriate set of parameters
-         * @returns the parameters of a signature found on the RHS if one exists; otherwise 'emptyArray'.
-         */
-        function getParametersFromRightHandSideOfAssignment(rightHandSide) {
-            while (rightHandSide.kind === 178 /* ParenthesizedExpression */) {
-                rightHandSide = rightHandSide.expression;
-            }
-            switch (rightHandSide.kind) {
-                case 179 /* FunctionExpression */:
-                case 180 /* ArrowFunction */:
-                    return rightHandSide.parameters;
-                case 192 /* ClassExpression */:
-                    for (var _i = 0, _a = rightHandSide.members; _i < _a.length; _i++) {
-                        var member = _a[_i];
-                        if (member.kind === 148 /* Constructor */) {
-                            return member.parameters;
-                        }
-                    }
-                    break;
-            }
-            return emptyArray;
-        }
-        function getTodoComments(fileName, descriptors) {
-            // Note: while getting todo comments seems like a syntactic operation, we actually
-            // treat it as a semantic operation here.  This is because we expect our host to call
-            // this on every single file.  If we treat this syntactically, then that will cause
-            // us to populate and throw away the tree in our syntax tree cache for each file.  By
-            // treating this as a semantic operation, we can access any tree without throwing
-            // anything away.
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            cancellationToken.throwIfCancellationRequested();
-            var fileContents = sourceFile.text;
-            var result = [];
-            if (descriptors.length > 0) {
-                var regExp = getTodoCommentsRegExp();
-                var matchArray = void 0;
-                while (matchArray = regExp.exec(fileContents)) {
-                    cancellationToken.throwIfCancellationRequested();
-                    // If we got a match, here is what the match array will look like.  Say the source text is:
-                    //
-                    //      "    // hack   1"
-                    //
-                    // The result array with the regexp:    will be:
-                    //
-                    //      ["// hack   1", "// ", "hack   1", undefined, "hack"]
-                    //
-                    // Here are the relevant capture groups:
-                    //  0) The full match for the entire regexp.
-                    //  1) The preamble to the message portion.
-                    //  2) The message portion.
-                    //  3...N) The descriptor that was matched - by index.  'undefined' for each
-                    //         descriptor that didn't match.  an actual value if it did match.
-                    //
-                    //  i.e. 'undefined' in position 3 above means TODO(jason) didn't match.
-                    //       "hack"      in position 4 means HACK did match.
-                    var firstDescriptorCaptureIndex = 3;
-                    ts.Debug.assert(matchArray.length === descriptors.length + firstDescriptorCaptureIndex);
-                    var preamble = matchArray[1];
-                    var matchPosition = matchArray.index + preamble.length;
-                    // OK, we have found a match in the file.  This is only an acceptable match if
-                    // it is contained within a comment.
-                    var token = ts.getTokenAtPosition(sourceFile, matchPosition);
-                    if (!isInsideComment(sourceFile, token, matchPosition)) {
-                        continue;
-                    }
-                    var descriptor = undefined;
-                    for (var i = 0, n = descriptors.length; i < n; i++) {
-                        if (matchArray[i + firstDescriptorCaptureIndex]) {
-                            descriptor = descriptors[i];
-                        }
-                    }
-                    ts.Debug.assert(descriptor !== undefined);
-                    // We don't want to match something like 'TODOBY', so we make sure a non
-                    // letter/digit follows the match.
-                    if (isLetterOrDigit(fileContents.charCodeAt(matchPosition + descriptor.text.length))) {
-                        continue;
-                    }
-                    var message = matchArray[2];
-                    result.push({
-                        descriptor: descriptor,
-                        message: message,
-                        position: matchPosition
-                    });
-                }
-            }
-            return result;
-            function escapeRegExp(str) {
-                return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
-            }
-            function getTodoCommentsRegExp() {
-                // NOTE: ?:  means 'non-capture group'.  It allows us to have groups without having to
-                // filter them out later in the final result array.
-                // TODO comments can appear in one of the following forms:
-                //
-                //  1)      // TODO     or  /////////// TODO
-                //
-                //  2)      /* TODO     or  /********** TODO
-                //
-                //  3)      /*
-                //           *   TODO
-                //           */
-                //
-                // The following three regexps are used to match the start of the text up to the TODO
-                // comment portion.
-                var singleLineCommentStart = /(?:\/\/+\s*)/.source;
-                var multiLineCommentStart = /(?:\/\*+\s*)/.source;
-                var anyNumberOfSpacesAndAsterisksAtStartOfLine = /(?:^(?:\s|\*)*)/.source;
-                // Match any of the above three TODO comment start regexps.
-                // Note that the outermost group *is* a capture group.  We want to capture the preamble
-                // so that we can determine the starting position of the TODO comment match.
-                var preamble = "(" + anyNumberOfSpacesAndAsterisksAtStartOfLine + "|" + singleLineCommentStart + "|" + multiLineCommentStart + ")";
-                // Takes the descriptors and forms a regexp that matches them as if they were literals.
-                // For example, if the descriptors are "TODO(jason)" and "HACK", then this will be:
-                //
-                //      (?:(TODO\(jason\))|(HACK))
-                //
-                // Note that the outermost group is *not* a capture group, but the innermost groups
-                // *are* capture groups.  By capturing the inner literals we can determine after
-                // matching which descriptor we are dealing with.
-                var literals = "(?:" + ts.map(descriptors, function (d) { return "(" + escapeRegExp(d.text) + ")"; }).join("|") + ")";
-                // After matching a descriptor literal, the following regexp matches the rest of the
-                // text up to the end of the line (or */).
-                var endOfLineOrEndOfComment = /(?:$|\*\/)/.source;
-                var messageRemainder = /(?:.*?)/.source;
-                // This is the portion of the match we'll return as part of the TODO comment result. We
-                // match the literal portion up to the end of the line or end of comment.
-                var messagePortion = "(" + literals + messageRemainder + ")";
-                var regExpString = preamble + messagePortion + endOfLineOrEndOfComment;
-                // The final regexp will look like this:
-                // /((?:\/\/+\s*)|(?:\/\*+\s*)|(?:^(?:\s|\*)*))((?:(TODO\(jason\))|(HACK))(?:.*?))(?:$|\*\/)/gim
-                // The flags of the regexp are important here.
-                //  'g' is so that we are doing a global search and can find matches several times
-                //  in the input.
-                //
-                //  'i' is for case insensitivity (We do this to match C# TODO comment code).
-                //
-                //  'm' is so we can find matches in a multi-line input.
-                return new RegExp(regExpString, "gim");
-            }
-            function isLetterOrDigit(char) {
-                return (char >= 97 /* a */ && char <= 122 /* z */) ||
-                    (char >= 65 /* A */ && char <= 90 /* Z */) ||
-                    (char >= 48 /* _0 */ && char <= 57 /* _9 */);
-            }
-        }
-        function getStringLiteralTypeForNode(node, typeChecker) {
-            var searchNode = node.parent.kind === 166 /* StringLiteralType */ ? node.parent : node;
-            var type = typeChecker.getTypeAtLocation(searchNode);
-            if (type && type.flags & 256 /* StringLiteral */) {
-                return type;
-            }
-            return undefined;
-        }
-        function getRenameInfo(fileName, position) {
-            synchronizeHostData();
-            var sourceFile = getValidSourceFile(fileName);
-            var typeChecker = program.getTypeChecker();
-            var defaultLibFileName = host.getDefaultLibFileName(host.getCompilationSettings());
-            var canonicalDefaultLibName = getCanonicalFileName(ts.normalizePath(defaultLibFileName));
-            var node = ts.getTouchingWord(sourceFile, position);
-            // Can only rename an identifier.
-            if (node) {
-                if (node.kind === 69 /* Identifier */ ||
-                    node.kind === 9 /* StringLiteral */ ||
-                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
-                    var symbol = typeChecker.getSymbolAtLocation(node);
-                    // Only allow a symbol to be renamed if it actually has at least one declaration.
-                    if (symbol) {
-                        var declarations = symbol.getDeclarations();
-                        if (declarations && declarations.length > 0) {
-                            // Disallow rename for elements that are defined in the standard TypeScript library.
-                            if (ts.forEach(declarations, isDefinedInLibraryFile)) {
-                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                            }
-                            var displayName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
-                            var kind = getSymbolKind(symbol, node);
-                            if (kind) {
-                                return {
-                                    canRename: true,
-                                    kind: kind,
-                                    displayName: displayName,
-                                    localizedErrorMessage: undefined,
-                                    fullDisplayName: typeChecker.getFullyQualifiedName(symbol),
-                                    kindModifiers: getSymbolModifiers(symbol),
-                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                                };
-                            }
-                        }
-                    }
-                    else if (node.kind === 9 /* StringLiteral */) {
-                        var type = getStringLiteralTypeForNode(node, typeChecker);
-                        if (type) {
-                            if (isDefinedInLibraryFile(node)) {
-                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
-                            }
-                            else {
-                                var displayName = ts.stripQuotes(type.text);
-                                return {
-                                    canRename: true,
-                                    kind: ScriptElementKind.variableElement,
-                                    displayName: displayName,
-                                    localizedErrorMessage: undefined,
-                                    fullDisplayName: displayName,
-                                    kindModifiers: ScriptElementKindModifier.none,
-                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
-                                };
-                            }
-                        }
-                    }
-                }
-            }
-            return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_this_element));
-            function getRenameInfoError(localizedErrorMessage) {
-                return {
-                    canRename: false,
-                    localizedErrorMessage: localizedErrorMessage,
-                    displayName: undefined,
-                    fullDisplayName: undefined,
-                    kind: undefined,
-                    kindModifiers: undefined,
-                    triggerSpan: undefined
-                };
-            }
-            function isDefinedInLibraryFile(declaration) {
-                if (defaultLibFileName) {
-                    var sourceFile_3 = declaration.getSourceFile();
-                    var canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile_3.fileName));
-                    if (canonicalName === canonicalDefaultLibName) {
-                        return true;
-                    }
-                }
-                return false;
-            }
-            function createTriggerSpanForNode(node, sourceFile) {
-                var start = node.getStart(sourceFile);
-                var width = node.getWidth(sourceFile);
-                if (node.kind === 9 /* StringLiteral */) {
-                    // Exclude the quotes
-                    start += 1;
-                    width -= 2;
-                }
-                return ts.createTextSpan(start, width);
-            }
-        }
-        return {
-            dispose: dispose,
-            cleanupSemanticCache: cleanupSemanticCache,
-            getSyntacticDiagnostics: getSyntacticDiagnostics,
-            getSemanticDiagnostics: getSemanticDiagnostics,
-            getCompilerOptionsDiagnostics: getCompilerOptionsDiagnostics,
-            getSyntacticClassifications: getSyntacticClassifications,
-            getSemanticClassifications: getSemanticClassifications,
-            getEncodedSyntacticClassifications: getEncodedSyntacticClassifications,
-            getEncodedSemanticClassifications: getEncodedSemanticClassifications,
-            getCompletionsAtPosition: getCompletionsAtPosition,
-            getCompletionEntryDetails: getCompletionEntryDetails,
-            getSignatureHelpItems: getSignatureHelpItems,
-            getQuickInfoAtPosition: getQuickInfoAtPosition,
-            getDefinitionAtPosition: getDefinitionAtPosition,
-            getTypeDefinitionAtPosition: getTypeDefinitionAtPosition,
-            getReferencesAtPosition: getReferencesAtPosition,
-            findReferences: findReferences,
-            getOccurrencesAtPosition: getOccurrencesAtPosition,
-            getDocumentHighlights: getDocumentHighlights,
-            getNameOrDottedNameSpan: getNameOrDottedNameSpan,
-            getBreakpointStatementAtPosition: getBreakpointStatementAtPosition,
-            getNavigateToItems: getNavigateToItems,
-            getRenameInfo: getRenameInfo,
-            findRenameLocations: findRenameLocations,
-            getNavigationBarItems: getNavigationBarItems,
-            getOutliningSpans: getOutliningSpans,
-            getTodoComments: getTodoComments,
-            getBraceMatchingAtPosition: getBraceMatchingAtPosition,
-            getIndentationAtPosition: getIndentationAtPosition,
-            getFormattingEditsForRange: getFormattingEditsForRange,
-            getFormattingEditsForDocument: getFormattingEditsForDocument,
-            getFormattingEditsAfterKeystroke: getFormattingEditsAfterKeystroke,
-            getDocCommentTemplateAtPosition: getDocCommentTemplateAtPosition,
-            isValidBraceCompletionAtPostion: isValidBraceCompletionAtPostion,
-            getEmitOutput: getEmitOutput,
-            getNonBoundSourceFile: getNonBoundSourceFile,
-            getProgram: getProgram
-        };
-    }
-    ts.createLanguageService = createLanguageService;
-    /* @internal */
-    function getNameTable(sourceFile) {
-        if (!sourceFile.nameTable) {
-            initializeNameTable(sourceFile);
-        }
-        return sourceFile.nameTable;
-    }
-    ts.getNameTable = getNameTable;
-    function initializeNameTable(sourceFile) {
-        var nameTable = {};
-        walk(sourceFile);
-        sourceFile.nameTable = nameTable;
-        function walk(node) {
-            switch (node.kind) {
-                case 69 /* Identifier */:
-                    nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
-                    break;
-                case 9 /* StringLiteral */:
-                case 8 /* NumericLiteral */:
-                    // We want to store any numbers/strings if they were a name that could be
-                    // related to a declaration.  So, if we have 'import x = require("something")'
-                    // then we want 'something' to be in the name table.  Similarly, if we have
-                    // "a['propname']" then we want to store "propname" in the name table.
-                    if (ts.isDeclarationName(node) ||
-                        node.parent.kind === 240 /* ExternalModuleReference */ ||
-                        isArgumentOfElementAccessExpression(node) ||
-                        ts.isLiteralComputedPropertyDeclarationName(node)) {
-                        nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
-                    }
-                    break;
-                default:
-                    ts.forEachChild(node, walk);
-            }
-        }
-    }
-    function isArgumentOfElementAccessExpression(node) {
-        return node &&
-            node.parent &&
-            node.parent.kind === 173 /* ElementAccessExpression */ &&
-            node.parent.argumentExpression === node;
-    }
-    /// Classifier
-    function createClassifier() {
-        var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false);
-        /// We do not have a full parser support to know when we should parse a regex or not
-        /// If we consider every slash token to be a regex, we could be missing cases like "1/2/3", where
-        /// we have a series of divide operator. this list allows us to be more accurate by ruling out
-        /// locations where a regexp cannot exist.
-        var noRegexTable = [];
-        noRegexTable[69 /* Identifier */] = true;
-        noRegexTable[9 /* StringLiteral */] = true;
-        noRegexTable[8 /* NumericLiteral */] = true;
-        noRegexTable[10 /* RegularExpressionLiteral */] = true;
-        noRegexTable[97 /* ThisKeyword */] = true;
-        noRegexTable[41 /* PlusPlusToken */] = true;
-        noRegexTable[42 /* MinusMinusToken */] = true;
-        noRegexTable[18 /* CloseParenToken */] = true;
-        noRegexTable[20 /* CloseBracketToken */] = true;
-        noRegexTable[16 /* CloseBraceToken */] = true;
-        noRegexTable[99 /* TrueKeyword */] = true;
-        noRegexTable[84 /* FalseKeyword */] = true;
-        // Just a stack of TemplateHeads and OpenCurlyBraces, used to perform rudimentary (inexact)
-        // classification on template strings. Because of the context free nature of templates,
-        // the only precise way to classify a template portion would be by propagating the stack across
-        // lines, just as we do with the end-of-line state. However, this is a burden for implementers,
-        // and the behavior is entirely subsumed by the syntactic classifier anyway, so we instead
-        // flatten any nesting when the template stack is non-empty and encode it in the end-of-line state.
-        // Situations in which this fails are
-        //  1) When template strings are nested across different lines:
-        //          `hello ${ `world
-        //          ` }`
-        //
-        //     Where on the second line, you will get the closing of a template,
-        //     a closing curly, and a new template.
-        //
-        //  2) When substitution expressions have curly braces and the curly brace falls on the next line:
-        //          `hello ${ () => {
-        //          return "world" } } `
-        //
-        //     Where on the second line, you will get the 'return' keyword,
-        //     a string literal, and a template end consisting of '} } `'.
-        var templateStack = [];
-        /** Returns true if 'keyword2' can legally follow 'keyword1' in any language construct. */
-        function canFollow(keyword1, keyword2) {
-            if (ts.isAccessibilityModifier(keyword1)) {
-                if (keyword2 === 123 /* GetKeyword */ ||
-                    keyword2 === 131 /* SetKeyword */ ||
-                    keyword2 === 121 /* ConstructorKeyword */ ||
-                    keyword2 === 113 /* StaticKeyword */) {
-                    // Allow things like "public get", "public constructor" and "public static".
-                    // These are all legal.
-                    return true;
-                }
-                // Any other keyword following "public" is actually an identifier an not a real
-                // keyword.
-                return false;
-            }
-            // Assume any other keyword combination is legal.  This can be refined in the future
-            // if there are more cases we want the classifier to be better at.
-            return true;
-        }
-        function convertClassifications(classifications, text) {
-            var entries = [];
-            var dense = classifications.spans;
-            var lastEnd = 0;
-            for (var i = 0, n = dense.length; i < n; i += 3) {
-                var start = dense[i];
-                var length_3 = dense[i + 1];
-                var type = dense[i + 2];
-                // Make a whitespace entry between the last item and this one.
-                if (lastEnd >= 0) {
-                    var whitespaceLength_1 = start - lastEnd;
-                    if (whitespaceLength_1 > 0) {
-                        entries.push({ length: whitespaceLength_1, classification: TokenClass.Whitespace });
-                    }
-                }
-                entries.push({ length: length_3, classification: convertClassification(type) });
-                lastEnd = start + length_3;
-            }
-            var whitespaceLength = text.length - lastEnd;
-            if (whitespaceLength > 0) {
-                entries.push({ length: whitespaceLength, classification: TokenClass.Whitespace });
-            }
-            return { entries: entries, finalLexState: classifications.endOfLineState };
-        }
-        function convertClassification(type) {
-            switch (type) {
-                case 1 /* comment */: return TokenClass.Comment;
-                case 3 /* keyword */: return TokenClass.Keyword;
-                case 4 /* numericLiteral */: return TokenClass.NumberLiteral;
-                case 5 /* operator */: return TokenClass.Operator;
-                case 6 /* stringLiteral */: return TokenClass.StringLiteral;
-                case 8 /* whiteSpace */: return TokenClass.Whitespace;
-                case 10 /* punctuation */: return TokenClass.Punctuation;
-                case 2 /* identifier */:
-                case 11 /* className */:
-                case 12 /* enumName */:
-                case 13 /* interfaceName */:
-                case 14 /* moduleName */:
-                case 15 /* typeParameterName */:
-                case 16 /* typeAliasName */:
-                case 9 /* text */:
-                case 17 /* parameterName */:
-                default:
-                    return TokenClass.Identifier;
-            }
-        }
-        function getClassificationsForLine(text, lexState, syntacticClassifierAbsent) {
-            return convertClassifications(getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent), text);
-        }
-        // If there is a syntactic classifier ('syntacticClassifierAbsent' is false),
-        // we will be more conservative in order to avoid conflicting with the syntactic classifier.
-        function getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent) {
-            var offset = 0;
-            var token = 0 /* Unknown */;
-            var lastNonTriviaToken = 0 /* Unknown */;
-            // Empty out the template stack for reuse.
-            while (templateStack.length > 0) {
-                templateStack.pop();
-            }
-            // If we're in a string literal, then prepend: "\
-            // (and a newline).  That way when we lex we'll think we're still in a string literal.
-            //
-            // If we're in a multiline comment, then prepend: /*
-            // (and a newline).  That way when we lex we'll think we're still in a multiline comment.
-            switch (lexState) {
-                case 3 /* InDoubleQuoteStringLiteral */:
-                    text = "\"\\\n" + text;
-                    offset = 3;
-                    break;
-                case 2 /* InSingleQuoteStringLiteral */:
-                    text = "'\\\n" + text;
-                    offset = 3;
-                    break;
-                case 1 /* InMultiLineCommentTrivia */:
-                    text = "/*\n" + text;
-                    offset = 3;
-                    break;
-                case 4 /* InTemplateHeadOrNoSubstitutionTemplate */:
-                    text = "`\n" + text;
-                    offset = 2;
-                    break;
-                case 5 /* InTemplateMiddleOrTail */:
-                    text = "}\n" + text;
-                    offset = 2;
-                // fallthrough
-                case 6 /* InTemplateSubstitutionPosition */:
-                    templateStack.push(12 /* TemplateHead */);
-                    break;
-            }
-            scanner.setText(text);
-            var result = {
-                endOfLineState: 0 /* None */,
-                spans: []
-            };
-            // We can run into an unfortunate interaction between the lexical and syntactic classifier
-            // when the user is typing something generic.  Consider the case where the user types:
-            //
-            //      Foo<number
-            //
-            // From the lexical classifier's perspective, 'number' is a keyword, and so the word will
-            // be classified as such.  However, from the syntactic classifier's tree-based perspective
-            // this is simply an expression with the identifier 'number' on the RHS of the less than
-            // token.  So the classification will go back to being an identifier.  The moment the user
-            // types again, number will become a keyword, then an identifier, etc. etc.
-            //
-            // To try to avoid this problem, we avoid classifying contextual keywords as keywords
-            // when the user is potentially typing something generic.  We just can't do a good enough
-            // job at the lexical level, and so well leave it up to the syntactic classifier to make
-            // the determination.
-            //
-            // In order to determine if the user is potentially typing something generic, we use a
-            // weak heuristic where we track < and > tokens.  It's a weak heuristic, but should
-            // work well enough in practice.
-            var angleBracketStack = 0;
-            do {
-                token = scanner.scan();
-                if (!ts.isTrivia(token)) {
-                    if ((token === 39 /* SlashToken */ || token === 61 /* SlashEqualsToken */) && !noRegexTable[lastNonTriviaToken]) {
-                        if (scanner.reScanSlashToken() === 10 /* RegularExpressionLiteral */) {
-                            token = 10 /* RegularExpressionLiteral */;
-                        }
-                    }
-                    else if (lastNonTriviaToken === 21 /* DotToken */ && isKeyword(token)) {
-                        token = 69 /* Identifier */;
-                    }
-                    else if (isKeyword(lastNonTriviaToken) && isKeyword(token) && !canFollow(lastNonTriviaToken, token)) {
-                        // We have two keywords in a row.  Only treat the second as a keyword if
-                        // it's a sequence that could legally occur in the language.  Otherwise
-                        // treat it as an identifier.  This way, if someone writes "private var"
-                        // we recognize that 'var' is actually an identifier here.
-                        token = 69 /* Identifier */;
-                    }
-                    else if (lastNonTriviaToken === 69 /* Identifier */ &&
-                        token === 25 /* LessThanToken */) {
-                        // Could be the start of something generic.  Keep track of that by bumping
-                        // up the current count of generic contexts we may be in.
-                        angleBracketStack++;
-                    }
-                    else if (token === 27 /* GreaterThanToken */ && angleBracketStack > 0) {
-                        // If we think we're currently in something generic, then mark that that
-                        // generic entity is complete.
-                        angleBracketStack--;
-                    }
-                    else if (token === 117 /* AnyKeyword */ ||
-                        token === 132 /* StringKeyword */ ||
-                        token === 130 /* NumberKeyword */ ||
-                        token === 120 /* BooleanKeyword */ ||
-                        token === 133 /* SymbolKeyword */) {
-                        if (angleBracketStack > 0 && !syntacticClassifierAbsent) {
-                            // If it looks like we're could be in something generic, don't classify this
-                            // as a keyword.  We may just get overwritten by the syntactic classifier,
-                            // causing a noisy experience for the user.
-                            token = 69 /* Identifier */;
-                        }
-                    }
-                    else if (token === 12 /* TemplateHead */) {
-                        templateStack.push(token);
-                    }
-                    else if (token === 15 /* OpenBraceToken */) {
-                        // If we don't have anything on the template stack,
-                        // then we aren't trying to keep track of a previously scanned template head.
-                        if (templateStack.length > 0) {
-                            templateStack.push(token);
-                        }
-                    }
-                    else if (token === 16 /* CloseBraceToken */) {
-                        // If we don't have anything on the template stack,
-                        // then we aren't trying to keep track of a previously scanned template head.
-                        if (templateStack.length > 0) {
-                            var lastTemplateStackToken = ts.lastOrUndefined(templateStack);
-                            if (lastTemplateStackToken === 12 /* TemplateHead */) {
-                                token = scanner.reScanTemplateToken();
-                                // Only pop on a TemplateTail; a TemplateMiddle indicates there is more for us.
-                                if (token === 14 /* TemplateTail */) {
-                                    templateStack.pop();
-                                }
-                                else {
-                                    ts.Debug.assert(token === 13 /* TemplateMiddle */, "Should have been a template middle. Was " + token);
-                                }
-                            }
-                            else {
-                                ts.Debug.assert(lastTemplateStackToken === 15 /* OpenBraceToken */, "Should have been an open brace. Was: " + token);
-                                templateStack.pop();
-                            }
-                        }
-                    }
-                    lastNonTriviaToken = token;
-                }
-                processToken();
-            } while (token !== 1 /* EndOfFileToken */);
-            return result;
-            function processToken() {
-                var start = scanner.getTokenPos();
-                var end = scanner.getTextPos();
-                addResult(start, end, classFromKind(token));
-                if (end >= text.length) {
-                    if (token === 9 /* StringLiteral */ || token === 166 /* StringLiteralType */) {
-                        // Check to see if we finished up on a multiline string literal.
-                        var tokenText = scanner.getTokenText();
-                        if (scanner.isUnterminated()) {
-                            var lastCharIndex = tokenText.length - 1;
-                            var numBackslashes = 0;
-                            while (tokenText.charCodeAt(lastCharIndex - numBackslashes) === 92 /* backslash */) {
-                                numBackslashes++;
-                            }
-                            // If we have an odd number of backslashes, then the multiline string is unclosed
-                            if (numBackslashes & 1) {
-                                var quoteChar = tokenText.charCodeAt(0);
-                                result.endOfLineState = quoteChar === 34 /* doubleQuote */
-                                    ? 3 /* InDoubleQuoteStringLiteral */
-                                    : 2 /* InSingleQuoteStringLiteral */;
-                            }
-                        }
-                    }
-                    else if (token === 3 /* MultiLineCommentTrivia */) {
-                        // Check to see if the multiline comment was unclosed.
-                        if (scanner.isUnterminated()) {
-                            result.endOfLineState = 1 /* InMultiLineCommentTrivia */;
-                        }
-                    }
-                    else if (ts.isTemplateLiteralKind(token)) {
-                        if (scanner.isUnterminated()) {
-                            if (token === 14 /* TemplateTail */) {
-                                result.endOfLineState = 5 /* InTemplateMiddleOrTail */;
-                            }
-                            else if (token === 11 /* NoSubstitutionTemplateLiteral */) {
-                                result.endOfLineState = 4 /* InTemplateHeadOrNoSubstitutionTemplate */;
-                            }
-                            else {
-                                ts.Debug.fail("Only 'NoSubstitutionTemplateLiteral's and 'TemplateTail's can be unterminated; got SyntaxKind #" + token);
-                            }
-                        }
-                    }
-                    else if (templateStack.length > 0 && ts.lastOrUndefined(templateStack) === 12 /* TemplateHead */) {
-                        result.endOfLineState = 6 /* InTemplateSubstitutionPosition */;
-                    }
-                }
-            }
-            function addResult(start, end, classification) {
-                if (classification === 8 /* whiteSpace */) {
-                    // Don't bother with whitespace classifications.  They're not needed.
-                    return;
-                }
-                if (start === 0 && offset > 0) {
-                    // We're classifying the first token, and this was a case where we prepended
-                    // text.  We should consider the start of this token to be at the start of
-                    // the original text.
-                    start += offset;
-                }
-                // All our tokens are in relation to the augmented text.  Move them back to be
-                // relative to the original text.
-                start -= offset;
-                end -= offset;
-                var length = end - start;
-                if (length > 0) {
-                    result.spans.push(start);
-                    result.spans.push(length);
-                    result.spans.push(classification);
-                }
-            }
-        }
-        function isBinaryExpressionOperatorToken(token) {
-            switch (token) {
-                case 37 /* AsteriskToken */:
-                case 39 /* SlashToken */:
-                case 40 /* PercentToken */:
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 43 /* LessThanLessThanToken */:
-                case 44 /* GreaterThanGreaterThanToken */:
-                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
-                case 25 /* LessThanToken */:
-                case 27 /* GreaterThanToken */:
-                case 28 /* LessThanEqualsToken */:
-                case 29 /* GreaterThanEqualsToken */:
-                case 91 /* InstanceOfKeyword */:
-                case 90 /* InKeyword */:
-                case 116 /* AsKeyword */:
-                case 30 /* EqualsEqualsToken */:
-                case 31 /* ExclamationEqualsToken */:
-                case 32 /* EqualsEqualsEqualsToken */:
-                case 33 /* ExclamationEqualsEqualsToken */:
-                case 46 /* AmpersandToken */:
-                case 48 /* CaretToken */:
-                case 47 /* BarToken */:
-                case 51 /* AmpersandAmpersandToken */:
-                case 52 /* BarBarToken */:
-                case 67 /* BarEqualsToken */:
-                case 66 /* AmpersandEqualsToken */:
-                case 68 /* CaretEqualsToken */:
-                case 63 /* LessThanLessThanEqualsToken */:
-                case 64 /* GreaterThanGreaterThanEqualsToken */:
-                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
-                case 57 /* PlusEqualsToken */:
-                case 58 /* MinusEqualsToken */:
-                case 59 /* AsteriskEqualsToken */:
-                case 61 /* SlashEqualsToken */:
-                case 62 /* PercentEqualsToken */:
-                case 56 /* EqualsToken */:
-                case 24 /* CommaToken */:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-        function isPrefixUnaryExpressionOperatorToken(token) {
-            switch (token) {
-                case 35 /* PlusToken */:
-                case 36 /* MinusToken */:
-                case 50 /* TildeToken */:
-                case 49 /* ExclamationToken */:
-                case 41 /* PlusPlusToken */:
-                case 42 /* MinusMinusToken */:
-                    return true;
-                default:
-                    return false;
-            }
-        }
-        function isKeyword(token) {
-            return token >= 70 /* FirstKeyword */ && token <= 138 /* LastKeyword */;
-        }
-        function classFromKind(token) {
-            if (isKeyword(token)) {
-                return 3 /* keyword */;
-            }
-            else if (isBinaryExpressionOperatorToken(token) || isPrefixUnaryExpressionOperatorToken(token)) {
-                return 5 /* operator */;
-            }
-            else if (token >= 15 /* FirstPunctuation */ && token <= 68 /* LastPunctuation */) {
-                return 10 /* punctuation */;
-            }
-            switch (token) {
-                case 8 /* NumericLiteral */:
-                    return 4 /* numericLiteral */;
-                case 9 /* StringLiteral */:
-                case 166 /* StringLiteralType */:
-                    return 6 /* stringLiteral */;
-                case 10 /* RegularExpressionLiteral */:
-                    return 7 /* regularExpressionLiteral */;
-                case 7 /* ConflictMarkerTrivia */:
-                case 3 /* MultiLineCommentTrivia */:
-                case 2 /* SingleLineCommentTrivia */:
-                    return 1 /* comment */;
-                case 5 /* WhitespaceTrivia */:
-                case 4 /* NewLineTrivia */:
-                    return 8 /* whiteSpace */;
-                case 69 /* Identifier */:
-                default:
-                    if (ts.isTemplateLiteralKind(token)) {
-                        return 6 /* stringLiteral */;
-                    }
-                    return 2 /* identifier */;
-            }
-        }
-        return {
-            getClassificationsForLine: getClassificationsForLine,
-            getEncodedLexicalClassifications: getEncodedLexicalClassifications
-        };
-    }
-    ts.createClassifier = createClassifier;
-    /**
-      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
-      * node package.
-      * The functionality is not supported if the ts module is consumed outside of a node module.
-      */
-    function getDefaultLibFilePath(options) {
-        // Check __dirname is defined and that we are on a node.js system.
-        if (typeof __dirname !== "undefined") {
-            return __dirname + ts.directorySeparator + ts.getDefaultLibFileName(options);
-        }
-        throw new Error("getDefaultLibFilePath is only supported when consumed as a node module. ");
-    }
-    ts.getDefaultLibFilePath = getDefaultLibFilePath;
-    function initializeServices() {
-        ts.objectAllocator = {
-            getNodeConstructor: function () { return NodeObject; },
-            getSourceFileConstructor: function () { return SourceFileObject; },
-            getSymbolConstructor: function () { return SymbolObject; },
-            getTypeConstructor: function () { return TypeObject; },
-            getSignatureConstructor: function () { return SignatureObject; }
-        };
-    }
-    initializeServices();
-})(ts || (ts = {}));
-// Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0. 
-// See LICENSE.txt in the project root for complete license information.
-/// <reference path='services.ts' />
-/* @internal */
-var ts;
-(function (ts) {
-    var BreakpointResolver;
-    (function (BreakpointResolver) {
-        /**
-         * Get the breakpoint span in given sourceFile
-         */
-        function spanInSourceFileAtLocation(sourceFile, position) {
-            // Cannot set breakpoint in dts file
-            if (sourceFile.isDeclarationFile) {
-                return undefined;
-            }
-            var tokenAtLocation = ts.getTokenAtPosition(sourceFile, position);
-            var lineOfPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
-            if (sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getStart(sourceFile)).line > lineOfPosition) {
-                // Get previous token if the token is returned starts on new line
-                // eg: let x =10; |--- cursor is here
-                //     let y = 10; 
-                // token at position will return let keyword on second line as the token but we would like to use 
-                // token on same line if trailing trivia (comments or white spaces on same line) part of the last token on that line
-                tokenAtLocation = ts.findPrecedingToken(tokenAtLocation.pos, sourceFile);
-                // It's a blank line
-                if (!tokenAtLocation || sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getEnd()).line !== lineOfPosition) {
-                    return undefined;
-                }
-            }
-            // Cannot set breakpoint in ambient declarations
-            if (ts.isInAmbientContext(tokenAtLocation)) {
-                return undefined;
-            }
-            // Get the span in the node based on its syntax
-            return spanInNode(tokenAtLocation);
-            function textSpan(startNode, endNode) {
-                var start = startNode.decorators ?
-                    ts.skipTrivia(sourceFile.text, startNode.decorators.end) :
-                    startNode.getStart(sourceFile);
-                return ts.createTextSpanFromBounds(start, (endNode || startNode).getEnd());
-            }
-            function textSpanEndingAtNextToken(startNode, previousTokenToFindNextEndToken) {
-                return textSpan(startNode, ts.findNextToken(previousTokenToFindNextEndToken, previousTokenToFindNextEndToken.parent));
-            }
-            function spanInNodeIfStartsOnSameLine(node, otherwiseOnNode) {
-                if (node && lineOfPosition === sourceFile.getLineAndCharacterOfPosition(node.getStart(sourceFile)).line) {
-                    return spanInNode(node);
-                }
-                return spanInNode(otherwiseOnNode);
-            }
-            function spanInNodeArray(nodeArray) {
-                return ts.createTextSpanFromBounds(ts.skipTrivia(sourceFile.text, nodeArray.pos), nodeArray.end);
-            }
-            function spanInPreviousNode(node) {
-                return spanInNode(ts.findPrecedingToken(node.pos, sourceFile));
-            }
-            function spanInNextNode(node) {
-                return spanInNode(ts.findNextToken(node, node.parent));
-            }
-            function spanInNode(node) {
-                if (node) {
-                    switch (node.kind) {
-                        case 200 /* VariableStatement */:
-                            // Span on first variable declaration
-                            return spanInVariableDeclaration(node.declarationList.declarations[0]);
-                        case 218 /* VariableDeclaration */:
-                        case 145 /* PropertyDeclaration */:
-                        case 144 /* PropertySignature */:
-                            return spanInVariableDeclaration(node);
-                        case 142 /* Parameter */:
-                            return spanInParameterDeclaration(node);
-                        case 220 /* FunctionDeclaration */:
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                        case 148 /* Constructor */:
-                        case 179 /* FunctionExpression */:
-                        case 180 /* ArrowFunction */:
-                            return spanInFunctionDeclaration(node);
-                        case 199 /* Block */:
-                            if (ts.isFunctionBlock(node)) {
-                                return spanInFunctionBlock(node);
-                            }
-                        // Fall through
-                        case 226 /* ModuleBlock */:
-                            return spanInBlock(node);
-                        case 252 /* CatchClause */:
-                            return spanInBlock(node.block);
-                        case 202 /* ExpressionStatement */:
-                            // span on the expression
-                            return textSpan(node.expression);
-                        case 211 /* ReturnStatement */:
-                            // span on return keyword and expression if present
-                            return textSpan(node.getChildAt(0), node.expression);
-                        case 205 /* WhileStatement */:
-                            // Span on while(...)
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 204 /* DoStatement */:
-                            // span in statement of the do statement
-                            return spanInNode(node.statement);
-                        case 217 /* DebuggerStatement */:
-                            // span on debugger keyword
-                            return textSpan(node.getChildAt(0));
-                        case 203 /* IfStatement */:
-                            // set on if(..) span
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 214 /* LabeledStatement */:
-                            // span in statement
-                            return spanInNode(node.statement);
-                        case 210 /* BreakStatement */:
-                        case 209 /* ContinueStatement */:
-                            // On break or continue keyword and label if present
-                            return textSpan(node.getChildAt(0), node.label);
-                        case 206 /* ForStatement */:
-                            return spanInForStatement(node);
-                        case 207 /* ForInStatement */:
-                            // span of for (a in ...)
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 208 /* ForOfStatement */:
-                            // span in initializer
-                            return spanInInitializerOfForLike(node);
-                        case 213 /* SwitchStatement */:
-                            // span on switch(...)
-                            return textSpanEndingAtNextToken(node, node.expression);
-                        case 249 /* CaseClause */:
-                        case 250 /* DefaultClause */:
-                            // span in first statement of the clause
-                            return spanInNode(node.statements[0]);
-                        case 216 /* TryStatement */:
-                            // span in try block
-                            return spanInBlock(node.tryBlock);
-                        case 215 /* ThrowStatement */:
-                            // span in throw ...
-                            return textSpan(node, node.expression);
-                        case 235 /* ExportAssignment */:
-                            // span on export = id
-                            return textSpan(node, node.expression);
-                        case 229 /* ImportEqualsDeclaration */:
-                            // import statement without including semicolon
-                            return textSpan(node, node.moduleReference);
-                        case 230 /* ImportDeclaration */:
-                            // import statement without including semicolon
-                            return textSpan(node, node.moduleSpecifier);
-                        case 236 /* ExportDeclaration */:
-                            // import statement without including semicolon
-                            return textSpan(node, node.moduleSpecifier);
-                        case 225 /* ModuleDeclaration */:
-                            // span on complete module if it is instantiated
-                            if (ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
-                                return undefined;
-                            }
-                        case 221 /* ClassDeclaration */:
-                        case 224 /* EnumDeclaration */:
-                        case 255 /* EnumMember */:
-                        case 169 /* BindingElement */:
-                            // span on complete node
-                            return textSpan(node);
-                        case 212 /* WithStatement */:
-                            // span in statement
-                            return spanInNode(node.statement);
-                        case 143 /* Decorator */:
-                            return spanInNodeArray(node.parent.decorators);
-                        case 167 /* ObjectBindingPattern */:
-                        case 168 /* ArrayBindingPattern */:
-                            return spanInBindingPattern(node);
-                        // No breakpoint in interface, type alias
-                        case 222 /* InterfaceDeclaration */:
-                        case 223 /* TypeAliasDeclaration */:
-                            return undefined;
-                        // Tokens:
-                        case 23 /* SemicolonToken */:
-                        case 1 /* EndOfFileToken */:
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile));
-                        case 24 /* CommaToken */:
-                            return spanInPreviousNode(node);
-                        case 15 /* OpenBraceToken */:
-                            return spanInOpenBraceToken(node);
-                        case 16 /* CloseBraceToken */:
-                            return spanInCloseBraceToken(node);
-                        case 20 /* CloseBracketToken */:
-                            return spanInCloseBracketToken(node);
-                        case 17 /* OpenParenToken */:
-                            return spanInOpenParenToken(node);
-                        case 18 /* CloseParenToken */:
-                            return spanInCloseParenToken(node);
-                        case 54 /* ColonToken */:
-                            return spanInColonToken(node);
-                        case 27 /* GreaterThanToken */:
-                        case 25 /* LessThanToken */:
-                            return spanInGreaterThanOrLessThanToken(node);
-                        // Keywords:
-                        case 104 /* WhileKeyword */:
-                            return spanInWhileKeyword(node);
-                        case 80 /* ElseKeyword */:
-                        case 72 /* CatchKeyword */:
-                        case 85 /* FinallyKeyword */:
-                            return spanInNextNode(node);
-                        case 138 /* OfKeyword */:
-                            return spanInOfKeyword(node);
-                        default:
-                            // Destructuring pattern in destructuring assignment
-                            // [a, b, c] of
-                            // [a, b, c] = expression
-                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node)) {
-                                return spanInArrayLiteralOrObjectLiteralDestructuringPattern(node);
-                            }
-                            // Set breakpoint on identifier element of destructuring pattern
-                            // a or ...c  or d: x from 
-                            // [a, b, ...c] or { a, b } or { d: x } from destructuring pattern
-                            if ((node.kind === 69 /* Identifier */ ||
-                                node.kind == 191 /* SpreadElementExpression */ ||
-                                node.kind === 253 /* PropertyAssignment */ ||
-                                node.kind === 254 /* ShorthandPropertyAssignment */) &&
-                                ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
-                                return textSpan(node);
-                            }
-                            if (node.kind === 187 /* BinaryExpression */) {
-                                var binaryExpression = node;
-                                // Set breakpoint in destructuring pattern if its destructuring assignment
-                                // [a, b, c] or {a, b, c} of
-                                // [a, b, c] = expression or 
-                                // {a, b, c} = expression
-                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left)) {
-                                    return spanInArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left);
-                                }
-                                if (binaryExpression.operatorToken.kind === 56 /* EqualsToken */ &&
-                                    ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.parent)) {
-                                    // Set breakpoint on assignment expression element of destructuring pattern
-                                    // a = expression of 
-                                    // [a = expression, b, c] = someExpression or 
-                                    // { a = expression, b, c } = someExpression
-                                    return textSpan(node);
-                                }
-                                if (binaryExpression.operatorToken.kind === 24 /* CommaToken */) {
-                                    return spanInNode(binaryExpression.left);
-                                }
-                            }
-                            if (ts.isExpression(node)) {
-                                switch (node.parent.kind) {
-                                    case 204 /* DoStatement */:
-                                        // Set span as if on while keyword
-                                        return spanInPreviousNode(node);
-                                    case 143 /* Decorator */:
-                                        // Set breakpoint on the decorator emit
-                                        return spanInNode(node.parent);
-                                    case 206 /* ForStatement */:
-                                    case 208 /* ForOfStatement */:
-                                        return textSpan(node);
-                                    case 187 /* BinaryExpression */:
-                                        if (node.parent.operatorToken.kind === 24 /* CommaToken */) {
-                                            // If this is a comma expression, the breakpoint is possible in this expression
-                                            return textSpan(node);
-                                        }
-                                        break;
-                                    case 180 /* ArrowFunction */:
-                                        if (node.parent.body === node) {
-                                            // If this is body of arrow function, it is allowed to have the breakpoint
-                                            return textSpan(node);
-                                        }
-                                        break;
-                                }
-                            }
-                            // If this is name of property assignment, set breakpoint in the initializer
-                            if (node.parent.kind === 253 /* PropertyAssignment */ &&
-                                node.parent.name === node &&
-                                !ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.parent)) {
-                                return spanInNode(node.parent.initializer);
-                            }
-                            // Breakpoint in type assertion goes to its operand
-                            if (node.parent.kind === 177 /* TypeAssertionExpression */ && node.parent.type === node) {
-                                return spanInNextNode(node.parent.type);
-                            }
-                            // return type of function go to previous token
-                            if (ts.isFunctionLike(node.parent) && node.parent.type === node) {
-                                return spanInPreviousNode(node);
-                            }
-                            // initializer of variable/parameter declaration go to previous node
-                            if ((node.parent.kind === 218 /* VariableDeclaration */ ||
-                                node.parent.kind === 142 /* Parameter */)) {
-                                var paramOrVarDecl = node.parent;
-                                if (paramOrVarDecl.initializer === node ||
-                                    paramOrVarDecl.type === node ||
-                                    ts.isAssignmentOperator(node.kind)) {
-                                    return spanInPreviousNode(node);
-                                }
-                            }
-                            if (node.parent.kind === 187 /* BinaryExpression */) {
-                                var binaryExpression = node.parent;
-                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left) &&
-                                    (binaryExpression.right === node ||
-                                        binaryExpression.operatorToken === node)) {
-                                    // If initializer of destructuring assignment move to previous token
-                                    return spanInPreviousNode(node);
-                                }
-                            }
-                            // Default go to parent to set the breakpoint
-                            return spanInNode(node.parent);
-                    }
-                }
-                function textSpanFromVariableDeclaration(variableDeclaration) {
-                    var declarations = variableDeclaration.parent.declarations;
-                    if (declarations && declarations[0] === variableDeclaration) {
-                        // First declaration - include let keyword
-                        return textSpan(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent), variableDeclaration);
-                    }
-                    else {
-                        // Span only on this declaration
-                        return textSpan(variableDeclaration);
-                    }
-                }
-                function spanInVariableDeclaration(variableDeclaration) {
-                    // If declaration of for in statement, just set the span in parent
-                    if (variableDeclaration.parent.parent.kind === 207 /* ForInStatement */) {
-                        return spanInNode(variableDeclaration.parent.parent);
-                    }
-                    // If this is a destructuring pattern, set breakpoint in binding pattern
-                    if (ts.isBindingPattern(variableDeclaration.name)) {
-                        return spanInBindingPattern(variableDeclaration.name);
-                    }
-                    // Breakpoint is possible in variableDeclaration only if there is initialization
-                    // or its declaration from 'for of'
-                    if (variableDeclaration.initializer ||
-                        (variableDeclaration.flags & 1 /* Export */) ||
-                        variableDeclaration.parent.parent.kind === 208 /* ForOfStatement */) {
-                        return textSpanFromVariableDeclaration(variableDeclaration);
-                    }
-                    var declarations = variableDeclaration.parent.declarations;
-                    if (declarations && declarations[0] !== variableDeclaration) {
-                        // If we cannot set breakpoint on this declaration, set it on previous one
-                        // Because the variable declaration may be binding pattern and 
-                        // we would like to set breakpoint in last binding element if that's the case,
-                        // use preceding token instead
-                        return spanInNode(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent));
-                    }
-                }
-                function canHaveSpanInParameterDeclaration(parameter) {
-                    // Breakpoint is possible on parameter only if it has initializer, is a rest parameter, or has public or private modifier
-                    return !!parameter.initializer || parameter.dotDotDotToken !== undefined ||
-                        !!(parameter.flags & 4 /* Public */) || !!(parameter.flags & 8 /* Private */);
-                }
-                function spanInParameterDeclaration(parameter) {
-                    if (ts.isBindingPattern(parameter.name)) {
-                        // Set breakpoint in binding pattern
-                        return spanInBindingPattern(parameter.name);
-                    }
-                    else if (canHaveSpanInParameterDeclaration(parameter)) {
-                        return textSpan(parameter);
-                    }
-                    else {
-                        var functionDeclaration = parameter.parent;
-                        var indexOfParameter = ts.indexOf(functionDeclaration.parameters, parameter);
-                        if (indexOfParameter) {
-                            // Not a first parameter, go to previous parameter
-                            return spanInParameterDeclaration(functionDeclaration.parameters[indexOfParameter - 1]);
-                        }
-                        else {
-                            // Set breakpoint in the function declaration body
-                            return spanInNode(functionDeclaration.body);
-                        }
-                    }
-                }
-                function canFunctionHaveSpanInWholeDeclaration(functionDeclaration) {
-                    return !!(functionDeclaration.flags & 1 /* Export */) ||
-                        (functionDeclaration.parent.kind === 221 /* ClassDeclaration */ && functionDeclaration.kind !== 148 /* Constructor */);
-                }
-                function spanInFunctionDeclaration(functionDeclaration) {
-                    // No breakpoints in the function signature
-                    if (!functionDeclaration.body) {
-                        return undefined;
-                    }
-                    if (canFunctionHaveSpanInWholeDeclaration(functionDeclaration)) {
-                        // Set the span on whole function declaration
-                        return textSpan(functionDeclaration);
-                    }
-                    // Set span in function body
-                    return spanInNode(functionDeclaration.body);
-                }
-                function spanInFunctionBlock(block) {
-                    var nodeForSpanInBlock = block.statements.length ? block.statements[0] : block.getLastToken();
-                    if (canFunctionHaveSpanInWholeDeclaration(block.parent)) {
-                        return spanInNodeIfStartsOnSameLine(block.parent, nodeForSpanInBlock);
-                    }
-                    return spanInNode(nodeForSpanInBlock);
-                }
-                function spanInBlock(block) {
-                    switch (block.parent.kind) {
-                        case 225 /* ModuleDeclaration */:
-                            if (ts.getModuleInstanceState(block.parent) !== 1 /* Instantiated */) {
-                                return undefined;
-                            }
-                        // Set on parent if on same line otherwise on first statement
-                        case 205 /* WhileStatement */:
-                        case 203 /* IfStatement */:
-                        case 207 /* ForInStatement */:
-                            return spanInNodeIfStartsOnSameLine(block.parent, block.statements[0]);
-                        // Set span on previous token if it starts on same line otherwise on the first statement of the block
-                        case 206 /* ForStatement */:
-                        case 208 /* ForOfStatement */:
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(block.pos, sourceFile, block.parent), block.statements[0]);
-                    }
-                    // Default action is to set on first statement
-                    return spanInNode(block.statements[0]);
-                }
-                function spanInInitializerOfForLike(forLikeStatement) {
-                    if (forLikeStatement.initializer.kind === 219 /* VariableDeclarationList */) {
-                        // Declaration list - set breakpoint in first declaration
-                        var variableDeclarationList = forLikeStatement.initializer;
-                        if (variableDeclarationList.declarations.length > 0) {
-                            return spanInNode(variableDeclarationList.declarations[0]);
-                        }
-                    }
-                    else {
-                        // Expression - set breakpoint in it
-                        return spanInNode(forLikeStatement.initializer);
-                    }
-                }
-                function spanInForStatement(forStatement) {
-                    if (forStatement.initializer) {
-                        return spanInInitializerOfForLike(forStatement);
-                    }
-                    if (forStatement.condition) {
-                        return textSpan(forStatement.condition);
-                    }
-                    if (forStatement.incrementor) {
-                        return textSpan(forStatement.incrementor);
-                    }
-                }
-                function spanInBindingPattern(bindingPattern) {
-                    // Set breakpoint in first binding element
-                    var firstBindingElement = ts.forEach(bindingPattern.elements, function (element) { return element.kind !== 193 /* OmittedExpression */ ? element : undefined; });
-                    if (firstBindingElement) {
-                        return spanInNode(firstBindingElement);
-                    }
-                    // Empty binding pattern of binding element, set breakpoint on binding element
-                    if (bindingPattern.parent.kind === 169 /* BindingElement */) {
-                        return textSpan(bindingPattern.parent);
-                    }
-                    // Variable declaration is used as the span
-                    return textSpanFromVariableDeclaration(bindingPattern.parent);
-                }
-                function spanInArrayLiteralOrObjectLiteralDestructuringPattern(node) {
-                    ts.Debug.assert(node.kind !== 168 /* ArrayBindingPattern */ && node.kind !== 167 /* ObjectBindingPattern */);
-                    var elements = node.kind === 170 /* ArrayLiteralExpression */ ?
-                        node.elements :
-                        node.properties;
-                    var firstBindingElement = ts.forEach(elements, function (element) { return element.kind !== 193 /* OmittedExpression */ ? element : undefined; });
-                    if (firstBindingElement) {
-                        return spanInNode(firstBindingElement);
-                    }
-                    // Could be ArrayLiteral from destructuring assignment or 
-                    // just nested element in another destructuring assignment
-                    // set breakpoint on assignment when parent is destructuring assignment
-                    // Otherwise set breakpoint for this element
-                    return textSpan(node.parent.kind === 187 /* BinaryExpression */ ? node.parent : node);
-                }
-                // Tokens:
-                function spanInOpenBraceToken(node) {
-                    switch (node.parent.kind) {
-                        case 224 /* EnumDeclaration */:
-                            var enumDeclaration = node.parent;
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), enumDeclaration.members.length ? enumDeclaration.members[0] : enumDeclaration.getLastToken(sourceFile));
-                        case 221 /* ClassDeclaration */:
-                            var classDeclaration = node.parent;
-                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), classDeclaration.members.length ? classDeclaration.members[0] : classDeclaration.getLastToken(sourceFile));
-                        case 227 /* CaseBlock */:
-                            return spanInNodeIfStartsOnSameLine(node.parent.parent, node.parent.clauses[0]);
-                    }
-                    // Default to parent node
-                    return spanInNode(node.parent);
-                }
-                function spanInCloseBraceToken(node) {
-                    switch (node.parent.kind) {
-                        case 226 /* ModuleBlock */:
-                            // If this is not an instantiated module block, no bp span
-                            if (ts.getModuleInstanceState(node.parent.parent) !== 1 /* Instantiated */) {
-                                return undefined;
-                            }
-                        case 224 /* EnumDeclaration */:
-                        case 221 /* ClassDeclaration */:
-                            // Span on close brace token
-                            return textSpan(node);
-                        case 199 /* Block */:
-                            if (ts.isFunctionBlock(node.parent)) {
-                                // Span on close brace token
-                                return textSpan(node);
-                            }
-                        // fall through
-                        case 252 /* CatchClause */:
-                            return spanInNode(ts.lastOrUndefined(node.parent.statements));
-                        case 227 /* CaseBlock */:
-                            // breakpoint in last statement of the last clause
-                            var caseBlock = node.parent;
-                            var lastClause = ts.lastOrUndefined(caseBlock.clauses);
-                            if (lastClause) {
-                                return spanInNode(ts.lastOrUndefined(lastClause.statements));
-                            }
-                            return undefined;
-                        case 167 /* ObjectBindingPattern */:
-                            // Breakpoint in last binding element or binding pattern if it contains no elements
-                            var bindingPattern = node.parent;
-                            return spanInNode(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
-                        // Default to parent node
-                        default:
-                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
-                                // Breakpoint in last binding element or binding pattern if it contains no elements
-                                var objectLiteral = node.parent;
-                                return textSpan(ts.lastOrUndefined(objectLiteral.properties) || objectLiteral);
-                            }
-                            return spanInNode(node.parent);
-                    }
-                }
-                function spanInCloseBracketToken(node) {
-                    switch (node.parent.kind) {
-                        case 168 /* ArrayBindingPattern */:
-                            // Breakpoint in last binding element or binding pattern if it contains no elements
-                            var bindingPattern = node.parent;
-                            return textSpan(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
-                        default:
-                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
-                                // Breakpoint in last binding element or binding pattern if it contains no elements
-                                var arrayLiteral = node.parent;
-                                return textSpan(ts.lastOrUndefined(arrayLiteral.elements) || arrayLiteral);
-                            }
-                            // Default to parent node
-                            return spanInNode(node.parent);
-                    }
-                }
-                function spanInOpenParenToken(node) {
-                    if (node.parent.kind === 204 /* DoStatement */ ||
-                        node.parent.kind === 174 /* CallExpression */ ||
-                        node.parent.kind === 175 /* NewExpression */) {
-                        return spanInPreviousNode(node);
-                    }
-                    if (node.parent.kind === 178 /* ParenthesizedExpression */) {
-                        return spanInNextNode(node);
-                    }
-                    // Default to parent node
-                    return spanInNode(node.parent);
-                }
-                function spanInCloseParenToken(node) {
-                    // Is this close paren token of parameter list, set span in previous token
-                    switch (node.parent.kind) {
-                        case 179 /* FunctionExpression */:
-                        case 220 /* FunctionDeclaration */:
-                        case 180 /* ArrowFunction */:
-                        case 147 /* MethodDeclaration */:
-                        case 146 /* MethodSignature */:
-                        case 149 /* GetAccessor */:
-                        case 150 /* SetAccessor */:
-                        case 148 /* Constructor */:
-                        case 205 /* WhileStatement */:
-                        case 204 /* DoStatement */:
-                        case 206 /* ForStatement */:
-                        case 208 /* ForOfStatement */:
-                        case 174 /* CallExpression */:
-                        case 175 /* NewExpression */:
-                        case 178 /* ParenthesizedExpression */:
-                            return spanInPreviousNode(node);
-                        // Default to parent node
-                        default:
-                            return spanInNode(node.parent);
-                    }
-                }
-                function spanInColonToken(node) {
-                    // Is this : specifying return annotation of the function declaration
-                    if (ts.isFunctionLike(node.parent) ||
-                        node.parent.kind === 253 /* PropertyAssignment */ ||
-                        node.parent.kind === 142 /* Parameter */) {
-                        return spanInPreviousNode(node);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInGreaterThanOrLessThanToken(node) {
-                    if (node.parent.kind === 177 /* TypeAssertionExpression */) {
-                        return spanInNextNode(node);
-                    }
-                    return spanInNode(node.parent);
-                }
-                function spanInWhileKeyword(node) {
-                    if (node.parent.kind === 204 /* DoStatement */) {
-                        // Set span on while expression
-                        return textSpanEndingAtNextToken(node, node.parent.expression);
-                    }
-                    // Default to parent node
-                    return spanInNode(node.parent);
-                }
-                function spanInOfKeyword(node) {
-                    if (node.parent.kind === 208 /* ForOfStatement */) {
-                        // Set using next token
-                        return spanInNextNode(node);
-                    }
-                    // Default to parent node
-                    return spanInNode(node.parent);
-                }
-            }
-        }
-        BreakpointResolver.spanInSourceFileAtLocation = spanInSourceFileAtLocation;
-    })(BreakpointResolver = ts.BreakpointResolver || (ts.BreakpointResolver = {}));
-})(ts || (ts = {}));
-//
-// Copyright (c) Microsoft Corporation.  All rights reserved.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//   http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-//
-/// <reference path='services.ts' />
-/* @internal */
-var debugObjectHost = this;
-// We need to use 'null' to interface with the managed side.
-/* tslint:disable:no-null-keyword */
-/* tslint:disable:no-in-operator */
-/* @internal */
-var ts;
-(function (ts) {
-    function logInternalError(logger, err) {
-        if (logger) {
-            logger.log("*INTERNAL ERROR* - Exception in typescript services: " + err.message);
-        }
-    }
-    var ScriptSnapshotShimAdapter = (function () {
-        function ScriptSnapshotShimAdapter(scriptSnapshotShim) {
-            this.scriptSnapshotShim = scriptSnapshotShim;
-        }
-        ScriptSnapshotShimAdapter.prototype.getText = function (start, end) {
-            return this.scriptSnapshotShim.getText(start, end);
-        };
-        ScriptSnapshotShimAdapter.prototype.getLength = function () {
-            return this.scriptSnapshotShim.getLength();
-        };
-        ScriptSnapshotShimAdapter.prototype.getChangeRange = function (oldSnapshot) {
-            var oldSnapshotShim = oldSnapshot;
-            var encoded = this.scriptSnapshotShim.getChangeRange(oldSnapshotShim.scriptSnapshotShim);
-            // TODO: should this be '==='?
-            if (encoded == null) {
-                return null;
-            }
-            var decoded = JSON.parse(encoded);
-            return ts.createTextChangeRange(ts.createTextSpan(decoded.span.start, decoded.span.length), decoded.newLength);
-        };
-        ScriptSnapshotShimAdapter.prototype.dispose = function () {
-            // if scriptSnapshotShim is a COM object then property check becomes method call with no arguments
-            // 'in' does not have this effect
-            if ("dispose" in this.scriptSnapshotShim) {
-                this.scriptSnapshotShim.dispose();
-            }
-        };
-        return ScriptSnapshotShimAdapter;
-    }());
-    var LanguageServiceShimHostAdapter = (function () {
-        function LanguageServiceShimHostAdapter(shimHost) {
-            var _this = this;
-            this.shimHost = shimHost;
-            this.loggingEnabled = false;
-            this.tracingEnabled = false;
-            // if shimHost is a COM object then property check will become method call with no arguments.
-            // 'in' does not have this effect. 
-            if ("getModuleResolutionsForFile" in this.shimHost) {
-                this.resolveModuleNames = function (moduleNames, containingFile) {
-                    var resolutionsInFile = JSON.parse(_this.shimHost.getModuleResolutionsForFile(containingFile));
-                    return ts.map(moduleNames, function (name) {
-                        var result = ts.lookUp(resolutionsInFile, name);
-                        return result ? { resolvedFileName: result } : undefined;
-                    });
-                };
-            }
-            if ("directoryExists" in this.shimHost) {
-                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
-            }
-            if ("getTypeReferenceDirectiveResolutionsForFile" in this.shimHost) {
-                this.resolveTypeReferenceDirectives = function (typeDirectiveNames, containingFile) {
-                    var typeDirectivesForFile = JSON.parse(_this.shimHost.getTypeReferenceDirectiveResolutionsForFile(containingFile));
-                    return ts.map(typeDirectiveNames, function (name) { return ts.lookUp(typeDirectivesForFile, name); });
-                };
-            }
-        }
-        LanguageServiceShimHostAdapter.prototype.log = function (s) {
-            if (this.loggingEnabled) {
-                this.shimHost.log(s);
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.trace = function (s) {
-            if (this.tracingEnabled) {
-                this.shimHost.trace(s);
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.error = function (s) {
-            this.shimHost.error(s);
-        };
-        LanguageServiceShimHostAdapter.prototype.getProjectVersion = function () {
-            if (!this.shimHost.getProjectVersion) {
-                // shimmed host does not support getProjectVersion
-                return undefined;
-            }
-            return this.shimHost.getProjectVersion();
-        };
-        LanguageServiceShimHostAdapter.prototype.useCaseSensitiveFileNames = function () {
-            return this.shimHost.useCaseSensitiveFileNames ? this.shimHost.useCaseSensitiveFileNames() : false;
-        };
-        LanguageServiceShimHostAdapter.prototype.getCompilationSettings = function () {
-            var settingsJson = this.shimHost.getCompilationSettings();
-            // TODO: should this be '==='?
-            if (settingsJson == null || settingsJson == "") {
-                throw Error("LanguageServiceShimHostAdapter.getCompilationSettings: empty compilationSettings");
-            }
-            return JSON.parse(settingsJson);
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptFileNames = function () {
-            var encoded = this.shimHost.getScriptFileNames();
-            return this.files = JSON.parse(encoded);
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptSnapshot = function (fileName) {
-            var scriptSnapshot = this.shimHost.getScriptSnapshot(fileName);
-            return scriptSnapshot && new ScriptSnapshotShimAdapter(scriptSnapshot);
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptKind = function (fileName) {
-            if ("getScriptKind" in this.shimHost) {
-                return this.shimHost.getScriptKind(fileName);
-            }
-            else {
-                return 0 /* Unknown */;
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.getScriptVersion = function (fileName) {
-            return this.shimHost.getScriptVersion(fileName);
-        };
-        LanguageServiceShimHostAdapter.prototype.getLocalizedDiagnosticMessages = function () {
-            var diagnosticMessagesJson = this.shimHost.getLocalizedDiagnosticMessages();
-            if (diagnosticMessagesJson == null || diagnosticMessagesJson == "") {
-                return null;
-            }
-            try {
-                return JSON.parse(diagnosticMessagesJson);
-            }
-            catch (e) {
-                this.log(e.description || "diagnosticMessages.generated.json has invalid JSON format");
-                return null;
-            }
-        };
-        LanguageServiceShimHostAdapter.prototype.getCancellationToken = function () {
-            var hostCancellationToken = this.shimHost.getCancellationToken();
-            return new ThrottledCancellationToken(hostCancellationToken);
-        };
-        LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
-            return this.shimHost.getCurrentDirectory();
-        };
-        LanguageServiceShimHostAdapter.prototype.getDirectories = function (path) {
-            return this.shimHost.getDirectories(path);
-        };
-        LanguageServiceShimHostAdapter.prototype.getDefaultLibFileName = function (options) {
-            return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
-        };
-        return LanguageServiceShimHostAdapter;
-    }());
-    ts.LanguageServiceShimHostAdapter = LanguageServiceShimHostAdapter;
-    /** A cancellation that throttles calls to the host */
-    var ThrottledCancellationToken = (function () {
-        function ThrottledCancellationToken(hostCancellationToken) {
-            this.hostCancellationToken = hostCancellationToken;
-            // Store when we last tried to cancel.  Checking cancellation can be expensive (as we have
-            // to marshall over to the host layer).  So we only bother actually checking once enough
-            // time has passed.
-            this.lastCancellationCheckTime = 0;
-        }
-        ThrottledCancellationToken.prototype.isCancellationRequested = function () {
-            var time = Date.now();
-            var duration = Math.abs(time - this.lastCancellationCheckTime);
-            if (duration > 10) {
-                // Check no more than once every 10 ms.
-                this.lastCancellationCheckTime = time;
-                return this.hostCancellationToken.isCancellationRequested();
-            }
-            return false;
-        };
-        return ThrottledCancellationToken;
-    }());
-    var CoreServicesShimHostAdapter = (function () {
-        function CoreServicesShimHostAdapter(shimHost) {
-            var _this = this;
-            this.shimHost = shimHost;
-            if ("directoryExists" in this.shimHost) {
-                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
-            }
-            if ("realpath" in this.shimHost) {
-                this.realpath = function (path) { return _this.shimHost.realpath(path); };
-            }
-        }
-        CoreServicesShimHostAdapter.prototype.readDirectory = function (rootDir, extension, exclude, depth) {
-            // Wrap the API changes for 2.0 release. This try/catch
-            // should be removed once TypeScript 2.0 has shipped.
-            var encoded;
-            try {
-                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude), depth);
-            }
-            catch (e) {
-                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude));
-            }
-            return JSON.parse(encoded);
-        };
-        CoreServicesShimHostAdapter.prototype.fileExists = function (fileName) {
-            return this.shimHost.fileExists(fileName);
-        };
-        CoreServicesShimHostAdapter.prototype.readFile = function (fileName) {
-            return this.shimHost.readFile(fileName);
-        };
-        return CoreServicesShimHostAdapter;
-    }());
-    ts.CoreServicesShimHostAdapter = CoreServicesShimHostAdapter;
-    function simpleForwardCall(logger, actionDescription, action, logPerformance) {
-        var start;
-        if (logPerformance) {
-            logger.log(actionDescription);
-            start = Date.now();
-        }
-        var result = action();
-        if (logPerformance) {
-            var end = Date.now();
-            logger.log(actionDescription + " completed in " + (end - start) + " msec");
-            if (typeof result === "string") {
-                var str = result;
-                if (str.length > 128) {
-                    str = str.substring(0, 128) + "...";
-                }
-                logger.log("  result.length=" + str.length + ", result='" + JSON.stringify(str) + "'");
-            }
-        }
-        return result;
-    }
-    function forwardJSONCall(logger, actionDescription, action, logPerformance) {
-        try {
-            var result = simpleForwardCall(logger, actionDescription, action, logPerformance);
-            return JSON.stringify({ result: result });
-        }
-        catch (err) {
-            if (err instanceof ts.OperationCanceledException) {
-                return JSON.stringify({ canceled: true });
-            }
-            logInternalError(logger, err);
-            err.description = actionDescription;
-            return JSON.stringify({ error: err });
-        }
-    }
-    var ShimBase = (function () {
-        function ShimBase(factory) {
-            this.factory = factory;
-            factory.registerShim(this);
-        }
-        ShimBase.prototype.dispose = function (dummy) {
-            this.factory.unregisterShim(this);
-        };
-        return ShimBase;
-    }());
-    function realizeDiagnostics(diagnostics, newLine) {
-        return diagnostics.map(function (d) { return realizeDiagnostic(d, newLine); });
-    }
-    ts.realizeDiagnostics = realizeDiagnostics;
-    function realizeDiagnostic(diagnostic, newLine) {
-        return {
-            message: ts.flattenDiagnosticMessageText(diagnostic.messageText, newLine),
-            start: diagnostic.start,
-            length: diagnostic.length,
-            /// TODO: no need for the tolowerCase call
-            category: ts.DiagnosticCategory[diagnostic.category].toLowerCase(),
-            code: diagnostic.code
-        };
-    }
-    var LanguageServiceShimObject = (function (_super) {
-        __extends(LanguageServiceShimObject, _super);
-        function LanguageServiceShimObject(factory, host, languageService) {
-            _super.call(this, factory);
-            this.host = host;
-            this.languageService = languageService;
-            this.logPerformance = false;
-            this.logger = this.host;
-        }
-        LanguageServiceShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
-            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
-        };
-        /// DISPOSE
-        /**
-         * Ensure (almost) deterministic release of internal Javascript resources when
-         * some external native objects holds onto us (e.g. Com/Interop).
-         */
-        LanguageServiceShimObject.prototype.dispose = function (dummy) {
-            this.logger.log("dispose()");
-            this.languageService.dispose();
-            this.languageService = null;
-            // force a GC
-            if (debugObjectHost && debugObjectHost.CollectGarbage) {
-                debugObjectHost.CollectGarbage();
-                this.logger.log("CollectGarbage()");
-            }
-            this.logger = null;
-            _super.prototype.dispose.call(this, dummy);
-        };
-        /// REFRESH
-        /**
-         * Update the list of scripts known to the compiler
-         */
-        LanguageServiceShimObject.prototype.refresh = function (throwOnError) {
-            this.forwardJSONCall("refresh(" + throwOnError + ")", function () { return null; });
-        };
-        LanguageServiceShimObject.prototype.cleanupSemanticCache = function () {
-            var _this = this;
-            this.forwardJSONCall("cleanupSemanticCache()", function () {
-                _this.languageService.cleanupSemanticCache();
-                return null;
-            });
-        };
-        LanguageServiceShimObject.prototype.realizeDiagnostics = function (diagnostics) {
-            var newLine = ts.getNewLineOrDefaultFromHost(this.host);
-            return ts.realizeDiagnostics(diagnostics, newLine);
-        };
-        LanguageServiceShimObject.prototype.getSyntacticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSyntacticClassifications(fileName, ts.createTextSpan(start, length)); });
-        };
-        LanguageServiceShimObject.prototype.getSemanticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSemanticClassifications(fileName, ts.createTextSpan(start, length)); });
-        };
-        LanguageServiceShimObject.prototype.getEncodedSyntacticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getEncodedSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", 
-            // directly serialize the spans out to a string.  This is much faster to decode
-            // on the managed side versus a full JSON array.
-            function () { return convertClassifications(_this.languageService.getEncodedSyntacticClassifications(fileName, ts.createTextSpan(start, length))); });
-        };
-        LanguageServiceShimObject.prototype.getEncodedSemanticClassifications = function (fileName, start, length) {
-            var _this = this;
-            return this.forwardJSONCall("getEncodedSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", 
-            // directly serialize the spans out to a string.  This is much faster to decode
-            // on the managed side versus a full JSON array.
-            function () { return convertClassifications(_this.languageService.getEncodedSemanticClassifications(fileName, ts.createTextSpan(start, length))); });
-        };
-        LanguageServiceShimObject.prototype.getSyntacticDiagnostics = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getSyntacticDiagnostics('" + fileName + "')", function () {
-                var diagnostics = _this.languageService.getSyntacticDiagnostics(fileName);
-                return _this.realizeDiagnostics(diagnostics);
-            });
-        };
-        LanguageServiceShimObject.prototype.getSemanticDiagnostics = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getSemanticDiagnostics('" + fileName + "')", function () {
-                var diagnostics = _this.languageService.getSemanticDiagnostics(fileName);
-                return _this.realizeDiagnostics(diagnostics);
-            });
-        };
-        LanguageServiceShimObject.prototype.getCompilerOptionsDiagnostics = function () {
-            var _this = this;
-            return this.forwardJSONCall("getCompilerOptionsDiagnostics()", function () {
-                var diagnostics = _this.languageService.getCompilerOptionsDiagnostics();
-                return _this.realizeDiagnostics(diagnostics);
-            });
-        };
-        /// QUICKINFO
-        /**
-         * Computes a string representation of the type at the requested position
-         * in the active file.
-         */
-        LanguageServiceShimObject.prototype.getQuickInfoAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getQuickInfoAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getQuickInfoAtPosition(fileName, position); });
-        };
-        /// NAMEORDOTTEDNAMESPAN
-        /**
-         * Computes span information of the name or dotted name at the requested position
-         * in the active file.
-         */
-        LanguageServiceShimObject.prototype.getNameOrDottedNameSpan = function (fileName, startPos, endPos) {
-            var _this = this;
-            return this.forwardJSONCall("getNameOrDottedNameSpan('" + fileName + "', " + startPos + ", " + endPos + ")", function () { return _this.languageService.getNameOrDottedNameSpan(fileName, startPos, endPos); });
-        };
-        /**
-         * STATEMENTSPAN
-         * Computes span information of statement at the requested position in the active file.
-         */
-        LanguageServiceShimObject.prototype.getBreakpointStatementAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getBreakpointStatementAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBreakpointStatementAtPosition(fileName, position); });
-        };
-        /// SIGNATUREHELP
-        LanguageServiceShimObject.prototype.getSignatureHelpItems = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getSignatureHelpItems('" + fileName + "', " + position + ")", function () { return _this.languageService.getSignatureHelpItems(fileName, position); });
-        };
-        /// GOTO DEFINITION
-        /**
-         * Computes the definition location and file for the symbol
-         * at the requested position.
-         */
-        LanguageServiceShimObject.prototype.getDefinitionAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDefinitionAtPosition(fileName, position); });
-        };
-        /// GOTO Type
-        /**
-         * Computes the definition location of the type of the symbol
-         * at the requested position.
-         */
-        LanguageServiceShimObject.prototype.getTypeDefinitionAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getTypeDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getTypeDefinitionAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getRenameInfo = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getRenameInfo('" + fileName + "', " + position + ")", function () { return _this.languageService.getRenameInfo(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.findRenameLocations = function (fileName, position, findInStrings, findInComments) {
-            var _this = this;
-            return this.forwardJSONCall("findRenameLocations('" + fileName + "', " + position + ", " + findInStrings + ", " + findInComments + ")", function () { return _this.languageService.findRenameLocations(fileName, position, findInStrings, findInComments); });
-        };
-        /// GET BRACE MATCHING
-        LanguageServiceShimObject.prototype.getBraceMatchingAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getBraceMatchingAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBraceMatchingAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.isValidBraceCompletionAtPostion = function (fileName, position, openingBrace) {
-            var _this = this;
-            return this.forwardJSONCall("isValidBraceCompletionAtPostion('" + fileName + "', " + position + ", " + openingBrace + ")", function () { return _this.languageService.isValidBraceCompletionAtPostion(fileName, position, openingBrace); });
-        };
-        /// GET SMART INDENT
-        LanguageServiceShimObject.prototype.getIndentationAtPosition = function (fileName, position, options /*Services.EditorOptions*/) {
-            var _this = this;
-            return this.forwardJSONCall("getIndentationAtPosition('" + fileName + "', " + position + ")", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getIndentationAtPosition(fileName, position, localOptions);
-            });
-        };
-        /// GET REFERENCES
-        LanguageServiceShimObject.prototype.getReferencesAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getReferencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getReferencesAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.findReferences = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("findReferences('" + fileName + "', " + position + ")", function () { return _this.languageService.findReferences(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getOccurrencesAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getOccurrencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getOccurrencesAtPosition(fileName, position); });
-        };
-        LanguageServiceShimObject.prototype.getDocumentHighlights = function (fileName, position, filesToSearch) {
-            var _this = this;
-            return this.forwardJSONCall("getDocumentHighlights('" + fileName + "', " + position + ")", function () {
-                var results = _this.languageService.getDocumentHighlights(fileName, position, JSON.parse(filesToSearch));
-                // workaround for VS document highlighting issue - keep only items from the initial file
-                var normalizedName = ts.normalizeSlashes(fileName).toLowerCase();
-                return ts.filter(results, function (r) { return ts.normalizeSlashes(r.fileName).toLowerCase() === normalizedName; });
-            });
-        };
-        /// COMPLETION LISTS
-        /**
-         * Get a string based representation of the completions
-         * to provide at the given source position and providing a member completion
-         * list if requested.
-         */
-        LanguageServiceShimObject.prototype.getCompletionsAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getCompletionsAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getCompletionsAtPosition(fileName, position); });
-        };
-        /** Get a string based representation of a completion list entry details */
-        LanguageServiceShimObject.prototype.getCompletionEntryDetails = function (fileName, position, entryName) {
-            var _this = this;
-            return this.forwardJSONCall("getCompletionEntryDetails('" + fileName + "', " + position + ", '" + entryName + "')", function () { return _this.languageService.getCompletionEntryDetails(fileName, position, entryName); });
-        };
-        LanguageServiceShimObject.prototype.getFormattingEditsForRange = function (fileName, start, end, options /*Services.FormatCodeOptions*/) {
-            var _this = this;
-            return this.forwardJSONCall("getFormattingEditsForRange('" + fileName + "', " + start + ", " + end + ")", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getFormattingEditsForRange(fileName, start, end, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getFormattingEditsForDocument = function (fileName, options /*Services.FormatCodeOptions*/) {
-            var _this = this;
-            return this.forwardJSONCall("getFormattingEditsForDocument('" + fileName + "')", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getFormattingEditsForDocument(fileName, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getFormattingEditsAfterKeystroke = function (fileName, position, key, options /*Services.FormatCodeOptions*/) {
-            var _this = this;
-            return this.forwardJSONCall("getFormattingEditsAfterKeystroke('" + fileName + "', " + position + ", '" + key + "')", function () {
-                var localOptions = JSON.parse(options);
-                return _this.languageService.getFormattingEditsAfterKeystroke(fileName, position, key, localOptions);
-            });
-        };
-        LanguageServiceShimObject.prototype.getDocCommentTemplateAtPosition = function (fileName, position) {
-            var _this = this;
-            return this.forwardJSONCall("getDocCommentTemplateAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDocCommentTemplateAtPosition(fileName, position); });
-        };
-        /// NAVIGATE TO
-        /** Return a list of symbols that are interesting to navigate to */
-        LanguageServiceShimObject.prototype.getNavigateToItems = function (searchValue, maxResultCount) {
-            var _this = this;
-            return this.forwardJSONCall("getNavigateToItems('" + searchValue + "', " + maxResultCount + ")", function () { return _this.languageService.getNavigateToItems(searchValue, maxResultCount); });
-        };
-        LanguageServiceShimObject.prototype.getNavigationBarItems = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getNavigationBarItems('" + fileName + "')", function () { return _this.languageService.getNavigationBarItems(fileName); });
-        };
-        LanguageServiceShimObject.prototype.getOutliningSpans = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getOutliningSpans('" + fileName + "')", function () { return _this.languageService.getOutliningSpans(fileName); });
-        };
-        LanguageServiceShimObject.prototype.getTodoComments = function (fileName, descriptors) {
-            var _this = this;
-            return this.forwardJSONCall("getTodoComments('" + fileName + "')", function () { return _this.languageService.getTodoComments(fileName, JSON.parse(descriptors)); });
-        };
-        /// Emit
-        LanguageServiceShimObject.prototype.getEmitOutput = function (fileName) {
-            var _this = this;
-            return this.forwardJSONCall("getEmitOutput('" + fileName + "')", function () { return _this.languageService.getEmitOutput(fileName); });
-        };
-        return LanguageServiceShimObject;
-    }(ShimBase));
-    function convertClassifications(classifications) {
-        return { spans: classifications.spans.join(","), endOfLineState: classifications.endOfLineState };
-    }
-    var ClassifierShimObject = (function (_super) {
-        __extends(ClassifierShimObject, _super);
-        function ClassifierShimObject(factory, logger) {
-            _super.call(this, factory);
-            this.logger = logger;
-            this.logPerformance = false;
-            this.classifier = ts.createClassifier();
-        }
-        ClassifierShimObject.prototype.getEncodedLexicalClassifications = function (text, lexState, syntacticClassifierAbsent) {
-            var _this = this;
-            return forwardJSONCall(this.logger, "getEncodedLexicalClassifications", function () { return convertClassifications(_this.classifier.getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent)); }, this.logPerformance);
-        };
-        /// COLORIZATION
-        ClassifierShimObject.prototype.getClassificationsForLine = function (text, lexState, classifyKeywordsInGenerics) {
-            var classification = this.classifier.getClassificationsForLine(text, lexState, classifyKeywordsInGenerics);
-            var result = "";
-            for (var _i = 0, _a = classification.entries; _i < _a.length; _i++) {
-                var item = _a[_i];
-                result += item.length + "\n";
-                result += item.classification + "\n";
-            }
-            result += classification.finalLexState;
-            return result;
-        };
-        return ClassifierShimObject;
-    }(ShimBase));
-    var CoreServicesShimObject = (function (_super) {
-        __extends(CoreServicesShimObject, _super);
-        function CoreServicesShimObject(factory, logger, host) {
-            _super.call(this, factory);
-            this.logger = logger;
-            this.host = host;
-            this.logPerformance = false;
-        }
-        CoreServicesShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
-            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
-        };
-        CoreServicesShimObject.prototype.resolveModuleName = function (fileName, moduleName, compilerOptionsJson) {
-            var _this = this;
-            return this.forwardJSONCall("resolveModuleName('" + fileName + "')", function () {
-                var compilerOptions = JSON.parse(compilerOptionsJson);
-                var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
-                return {
-                    resolvedFileName: result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined,
-                    failedLookupLocations: result.failedLookupLocations
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.resolveTypeReferenceDirective = function (fileName, typeReferenceDirective, compilerOptionsJson) {
-            var _this = this;
-            return this.forwardJSONCall("resolveTypeReferenceDirective(" + fileName + ")", function () {
-                var compilerOptions = JSON.parse(compilerOptionsJson);
-                var result = ts.resolveTypeReferenceDirective(typeReferenceDirective, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
-                return {
-                    resolvedFileName: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.resolvedFileName : undefined,
-                    primary: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.primary : true,
-                    failedLookupLocations: result.failedLookupLocations
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.getPreProcessedFileInfo = function (fileName, sourceTextSnapshot) {
-            var _this = this;
-            return this.forwardJSONCall("getPreProcessedFileInfo('" + fileName + "')", function () {
-                // for now treat files as JavaScript 
-                var result = ts.preProcessFile(sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength()), /* readImportFiles */ true, /* detectJavaScriptImports */ true);
-                return {
-                    referencedFiles: _this.convertFileReferences(result.referencedFiles),
-                    importedFiles: _this.convertFileReferences(result.importedFiles),
-                    ambientExternalModules: result.ambientExternalModules,
-                    isLibFile: result.isLibFile,
-                    typeReferenceDirectives: _this.convertFileReferences(result.typeReferenceDirectives)
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.convertFileReferences = function (refs) {
-            if (!refs) {
-                return undefined;
-            }
-            var result = [];
-            for (var _i = 0, refs_2 = refs; _i < refs_2.length; _i++) {
-                var ref = refs_2[_i];
-                result.push({
-                    path: ts.normalizeSlashes(ref.fileName),
-                    position: ref.pos,
-                    length: ref.end - ref.pos
-                });
-            }
-            return result;
-        };
-        CoreServicesShimObject.prototype.getTSConfigFileInfo = function (fileName, sourceTextSnapshot) {
-            var _this = this;
-            return this.forwardJSONCall("getTSConfigFileInfo('" + fileName + "')", function () {
-                var text = sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength());
-                var result = ts.parseConfigFileTextToJson(fileName, text);
-                if (result.error) {
-                    return {
-                        options: {},
-                        typingOptions: {},
-                        files: [],
-                        raw: {},
-                        errors: [realizeDiagnostic(result.error, "\r\n")]
-                    };
-                }
-                var normalizedFileName = ts.normalizeSlashes(fileName);
-                var configFile = ts.parseJsonConfigFileContent(result.config, _this.host, ts.getDirectoryPath(normalizedFileName), /*existingOptions*/ {}, normalizedFileName);
-                return {
-                    options: configFile.options,
-                    typingOptions: configFile.typingOptions,
-                    files: configFile.fileNames,
-                    raw: configFile.raw,
-                    errors: realizeDiagnostics(configFile.errors, "\r\n")
-                };
-            });
-        };
-        CoreServicesShimObject.prototype.getDefaultCompilationSettings = function () {
-            return this.forwardJSONCall("getDefaultCompilationSettings()", function () { return ts.getDefaultCompilerOptions(); });
-        };
-        CoreServicesShimObject.prototype.discoverTypings = function (discoverTypingsJson) {
-            var _this = this;
-            var getCanonicalFileName = ts.createGetCanonicalFileName(/*useCaseSensitivefileNames:*/ false);
-            return this.forwardJSONCall("discoverTypings()", function () {
-                var info = JSON.parse(discoverTypingsJson);
-                return ts.JsTyping.discoverTypings(_this.host, info.fileNames, ts.toPath(info.projectRootPath, info.projectRootPath, getCanonicalFileName), ts.toPath(info.safeListPath, info.safeListPath, getCanonicalFileName), info.packageNameToTypingLocation, info.typingOptions, info.compilerOptions);
-            });
-        };
-        return CoreServicesShimObject;
-    }(ShimBase));
-    var TypeScriptServicesFactory = (function () {
-        function TypeScriptServicesFactory() {
-            this._shims = [];
-        }
-        /*
-         * Returns script API version.
-         */
-        TypeScriptServicesFactory.prototype.getServicesVersion = function () {
-            return ts.servicesVersion;
-        };
-        TypeScriptServicesFactory.prototype.createLanguageServiceShim = function (host) {
-            try {
-                if (this.documentRegistry === undefined) {
-                    this.documentRegistry = ts.createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory());
-                }
-                var hostAdapter = new LanguageServiceShimHostAdapter(host);
-                var languageService = ts.createLanguageService(hostAdapter, this.documentRegistry);
-                return new LanguageServiceShimObject(this, host, languageService);
-            }
-            catch (err) {
-                logInternalError(host, err);
-                throw err;
-            }
-        };
-        TypeScriptServicesFactory.prototype.createClassifierShim = function (logger) {
-            try {
-                return new ClassifierShimObject(this, logger);
-            }
-            catch (err) {
-                logInternalError(logger, err);
-                throw err;
-            }
-        };
-        TypeScriptServicesFactory.prototype.createCoreServicesShim = function (host) {
-            try {
-                var adapter = new CoreServicesShimHostAdapter(host);
-                return new CoreServicesShimObject(this, host, adapter);
-            }
-            catch (err) {
-                logInternalError(host, err);
-                throw err;
-            }
-        };
-        TypeScriptServicesFactory.prototype.close = function () {
-            // Forget all the registered shims
-            this._shims = [];
-            this.documentRegistry = undefined;
-        };
-        TypeScriptServicesFactory.prototype.registerShim = function (shim) {
-            this._shims.push(shim);
-        };
-        TypeScriptServicesFactory.prototype.unregisterShim = function (shim) {
-            for (var i = 0, n = this._shims.length; i < n; i++) {
-                if (this._shims[i] === shim) {
-                    delete this._shims[i];
-                    return;
-                }
-            }
-            throw new Error("Invalid operation");
-        };
-        return TypeScriptServicesFactory;
-    }());
-    ts.TypeScriptServicesFactory = TypeScriptServicesFactory;
-    if (typeof module !== "undefined" && module.exports) {
-        module.exports = ts;
-    }
-})(ts || (ts = {}));
-/* tslint:enable:no-in-operator */
-/* tslint:enable:no-null */
-/// TODO: this is used by VS, clean this up on both sides of the interface
-/* @internal */
-var TypeScript;
-(function (TypeScript) {
-    var Services;
-    (function (Services) {
-        Services.TypeScriptServicesFactory = ts.TypeScriptServicesFactory;
-    })(Services = TypeScript.Services || (TypeScript.Services = {}));
-})(TypeScript || (TypeScript = {}));
-/* tslint:disable:no-unused-variable */
-// 'toolsVersion' gets consumed by the managed side, so it's not unused.
-// TODO: it should be moved into a namespace though.
-/* @internal */
-var toolsVersion = "1.9";
-/* tslint:enable:no-unused-variable */ 
+var __extends = (this && this.__extends) || function (d, b) {
+    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+};
+var ts;
+(function (ts) {
+    // token > SyntaxKind.Identifer => token is a keyword
+    // Also, If you add a new SyntaxKind be sure to keep the `Markers` section at the bottom in sync
+    (function (SyntaxKind) {
+        SyntaxKind[SyntaxKind["Unknown"] = 0] = "Unknown";
+        SyntaxKind[SyntaxKind["EndOfFileToken"] = 1] = "EndOfFileToken";
+        SyntaxKind[SyntaxKind["SingleLineCommentTrivia"] = 2] = "SingleLineCommentTrivia";
+        SyntaxKind[SyntaxKind["MultiLineCommentTrivia"] = 3] = "MultiLineCommentTrivia";
+        SyntaxKind[SyntaxKind["NewLineTrivia"] = 4] = "NewLineTrivia";
+        SyntaxKind[SyntaxKind["WhitespaceTrivia"] = 5] = "WhitespaceTrivia";
+        // We detect and preserve #! on the first line
+        SyntaxKind[SyntaxKind["ShebangTrivia"] = 6] = "ShebangTrivia";
+        // We detect and provide better error recovery when we encounter a git merge marker.  This
+        // allows us to edit files with git-conflict markers in them in a much more pleasant manner.
+        SyntaxKind[SyntaxKind["ConflictMarkerTrivia"] = 7] = "ConflictMarkerTrivia";
+        // Literals
+        SyntaxKind[SyntaxKind["NumericLiteral"] = 8] = "NumericLiteral";
+        SyntaxKind[SyntaxKind["StringLiteral"] = 9] = "StringLiteral";
+        SyntaxKind[SyntaxKind["RegularExpressionLiteral"] = 10] = "RegularExpressionLiteral";
+        SyntaxKind[SyntaxKind["NoSubstitutionTemplateLiteral"] = 11] = "NoSubstitutionTemplateLiteral";
+        // Pseudo-literals
+        SyntaxKind[SyntaxKind["TemplateHead"] = 12] = "TemplateHead";
+        SyntaxKind[SyntaxKind["TemplateMiddle"] = 13] = "TemplateMiddle";
+        SyntaxKind[SyntaxKind["TemplateTail"] = 14] = "TemplateTail";
+        // Punctuation
+        SyntaxKind[SyntaxKind["OpenBraceToken"] = 15] = "OpenBraceToken";
+        SyntaxKind[SyntaxKind["CloseBraceToken"] = 16] = "CloseBraceToken";
+        SyntaxKind[SyntaxKind["OpenParenToken"] = 17] = "OpenParenToken";
+        SyntaxKind[SyntaxKind["CloseParenToken"] = 18] = "CloseParenToken";
+        SyntaxKind[SyntaxKind["OpenBracketToken"] = 19] = "OpenBracketToken";
+        SyntaxKind[SyntaxKind["CloseBracketToken"] = 20] = "CloseBracketToken";
+        SyntaxKind[SyntaxKind["DotToken"] = 21] = "DotToken";
+        SyntaxKind[SyntaxKind["DotDotDotToken"] = 22] = "DotDotDotToken";
+        SyntaxKind[SyntaxKind["SemicolonToken"] = 23] = "SemicolonToken";
+        SyntaxKind[SyntaxKind["CommaToken"] = 24] = "CommaToken";
+        SyntaxKind[SyntaxKind["LessThanToken"] = 25] = "LessThanToken";
+        SyntaxKind[SyntaxKind["LessThanSlashToken"] = 26] = "LessThanSlashToken";
+        SyntaxKind[SyntaxKind["GreaterThanToken"] = 27] = "GreaterThanToken";
+        SyntaxKind[SyntaxKind["LessThanEqualsToken"] = 28] = "LessThanEqualsToken";
+        SyntaxKind[SyntaxKind["GreaterThanEqualsToken"] = 29] = "GreaterThanEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsEqualsToken"] = 30] = "EqualsEqualsToken";
+        SyntaxKind[SyntaxKind["ExclamationEqualsToken"] = 31] = "ExclamationEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsEqualsEqualsToken"] = 32] = "EqualsEqualsEqualsToken";
+        SyntaxKind[SyntaxKind["ExclamationEqualsEqualsToken"] = 33] = "ExclamationEqualsEqualsToken";
+        SyntaxKind[SyntaxKind["EqualsGreaterThanToken"] = 34] = "EqualsGreaterThanToken";
+        SyntaxKind[SyntaxKind["PlusToken"] = 35] = "PlusToken";
+        SyntaxKind[SyntaxKind["MinusToken"] = 36] = "MinusToken";
+        SyntaxKind[SyntaxKind["AsteriskToken"] = 37] = "AsteriskToken";
+        SyntaxKind[SyntaxKind["AsteriskAsteriskToken"] = 38] = "AsteriskAsteriskToken";
+        SyntaxKind[SyntaxKind["SlashToken"] = 39] = "SlashToken";
+        SyntaxKind[SyntaxKind["PercentToken"] = 40] = "PercentToken";
+        SyntaxKind[SyntaxKind["PlusPlusToken"] = 41] = "PlusPlusToken";
+        SyntaxKind[SyntaxKind["MinusMinusToken"] = 42] = "MinusMinusToken";
+        SyntaxKind[SyntaxKind["LessThanLessThanToken"] = 43] = "LessThanLessThanToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanToken"] = 44] = "GreaterThanGreaterThanToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanToken"] = 45] = "GreaterThanGreaterThanGreaterThanToken";
+        SyntaxKind[SyntaxKind["AmpersandToken"] = 46] = "AmpersandToken";
+        SyntaxKind[SyntaxKind["BarToken"] = 47] = "BarToken";
+        SyntaxKind[SyntaxKind["CaretToken"] = 48] = "CaretToken";
+        SyntaxKind[SyntaxKind["ExclamationToken"] = 49] = "ExclamationToken";
+        SyntaxKind[SyntaxKind["TildeToken"] = 50] = "TildeToken";
+        SyntaxKind[SyntaxKind["AmpersandAmpersandToken"] = 51] = "AmpersandAmpersandToken";
+        SyntaxKind[SyntaxKind["BarBarToken"] = 52] = "BarBarToken";
+        SyntaxKind[SyntaxKind["QuestionToken"] = 53] = "QuestionToken";
+        SyntaxKind[SyntaxKind["ColonToken"] = 54] = "ColonToken";
+        SyntaxKind[SyntaxKind["AtToken"] = 55] = "AtToken";
+        // Assignments
+        SyntaxKind[SyntaxKind["EqualsToken"] = 56] = "EqualsToken";
+        SyntaxKind[SyntaxKind["PlusEqualsToken"] = 57] = "PlusEqualsToken";
+        SyntaxKind[SyntaxKind["MinusEqualsToken"] = 58] = "MinusEqualsToken";
+        SyntaxKind[SyntaxKind["AsteriskEqualsToken"] = 59] = "AsteriskEqualsToken";
+        SyntaxKind[SyntaxKind["AsteriskAsteriskEqualsToken"] = 60] = "AsteriskAsteriskEqualsToken";
+        SyntaxKind[SyntaxKind["SlashEqualsToken"] = 61] = "SlashEqualsToken";
+        SyntaxKind[SyntaxKind["PercentEqualsToken"] = 62] = "PercentEqualsToken";
+        SyntaxKind[SyntaxKind["LessThanLessThanEqualsToken"] = 63] = "LessThanLessThanEqualsToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanEqualsToken"] = 64] = "GreaterThanGreaterThanEqualsToken";
+        SyntaxKind[SyntaxKind["GreaterThanGreaterThanGreaterThanEqualsToken"] = 65] = "GreaterThanGreaterThanGreaterThanEqualsToken";
+        SyntaxKind[SyntaxKind["AmpersandEqualsToken"] = 66] = "AmpersandEqualsToken";
+        SyntaxKind[SyntaxKind["BarEqualsToken"] = 67] = "BarEqualsToken";
+        SyntaxKind[SyntaxKind["CaretEqualsToken"] = 68] = "CaretEqualsToken";
+        // Identifiers
+        SyntaxKind[SyntaxKind["Identifier"] = 69] = "Identifier";
+        // Reserved words
+        SyntaxKind[SyntaxKind["BreakKeyword"] = 70] = "BreakKeyword";
+        SyntaxKind[SyntaxKind["CaseKeyword"] = 71] = "CaseKeyword";
+        SyntaxKind[SyntaxKind["CatchKeyword"] = 72] = "CatchKeyword";
+        SyntaxKind[SyntaxKind["ClassKeyword"] = 73] = "ClassKeyword";
+        SyntaxKind[SyntaxKind["ConstKeyword"] = 74] = "ConstKeyword";
+        SyntaxKind[SyntaxKind["ContinueKeyword"] = 75] = "ContinueKeyword";
+        SyntaxKind[SyntaxKind["DebuggerKeyword"] = 76] = "DebuggerKeyword";
+        SyntaxKind[SyntaxKind["DefaultKeyword"] = 77] = "DefaultKeyword";
+        SyntaxKind[SyntaxKind["DeleteKeyword"] = 78] = "DeleteKeyword";
+        SyntaxKind[SyntaxKind["DoKeyword"] = 79] = "DoKeyword";
+        SyntaxKind[SyntaxKind["ElseKeyword"] = 80] = "ElseKeyword";
+        SyntaxKind[SyntaxKind["EnumKeyword"] = 81] = "EnumKeyword";
+        SyntaxKind[SyntaxKind["ExportKeyword"] = 82] = "ExportKeyword";
+        SyntaxKind[SyntaxKind["ExtendsKeyword"] = 83] = "ExtendsKeyword";
+        SyntaxKind[SyntaxKind["FalseKeyword"] = 84] = "FalseKeyword";
+        SyntaxKind[SyntaxKind["FinallyKeyword"] = 85] = "FinallyKeyword";
+        SyntaxKind[SyntaxKind["ForKeyword"] = 86] = "ForKeyword";
+        SyntaxKind[SyntaxKind["FunctionKeyword"] = 87] = "FunctionKeyword";
+        SyntaxKind[SyntaxKind["IfKeyword"] = 88] = "IfKeyword";
+        SyntaxKind[SyntaxKind["ImportKeyword"] = 89] = "ImportKeyword";
+        SyntaxKind[SyntaxKind["InKeyword"] = 90] = "InKeyword";
+        SyntaxKind[SyntaxKind["InstanceOfKeyword"] = 91] = "InstanceOfKeyword";
+        SyntaxKind[SyntaxKind["NewKeyword"] = 92] = "NewKeyword";
+        SyntaxKind[SyntaxKind["NullKeyword"] = 93] = "NullKeyword";
+        SyntaxKind[SyntaxKind["ReturnKeyword"] = 94] = "ReturnKeyword";
+        SyntaxKind[SyntaxKind["SuperKeyword"] = 95] = "SuperKeyword";
+        SyntaxKind[SyntaxKind["SwitchKeyword"] = 96] = "SwitchKeyword";
+        SyntaxKind[SyntaxKind["ThisKeyword"] = 97] = "ThisKeyword";
+        SyntaxKind[SyntaxKind["ThrowKeyword"] = 98] = "ThrowKeyword";
+        SyntaxKind[SyntaxKind["TrueKeyword"] = 99] = "TrueKeyword";
+        SyntaxKind[SyntaxKind["TryKeyword"] = 100] = "TryKeyword";
+        SyntaxKind[SyntaxKind["TypeOfKeyword"] = 101] = "TypeOfKeyword";
+        SyntaxKind[SyntaxKind["VarKeyword"] = 102] = "VarKeyword";
+        SyntaxKind[SyntaxKind["VoidKeyword"] = 103] = "VoidKeyword";
+        SyntaxKind[SyntaxKind["WhileKeyword"] = 104] = "WhileKeyword";
+        SyntaxKind[SyntaxKind["WithKeyword"] = 105] = "WithKeyword";
+        // Strict mode reserved words
+        SyntaxKind[SyntaxKind["ImplementsKeyword"] = 106] = "ImplementsKeyword";
+        SyntaxKind[SyntaxKind["InterfaceKeyword"] = 107] = "InterfaceKeyword";
+        SyntaxKind[SyntaxKind["LetKeyword"] = 108] = "LetKeyword";
+        SyntaxKind[SyntaxKind["PackageKeyword"] = 109] = "PackageKeyword";
+        SyntaxKind[SyntaxKind["PrivateKeyword"] = 110] = "PrivateKeyword";
+        SyntaxKind[SyntaxKind["ProtectedKeyword"] = 111] = "ProtectedKeyword";
+        SyntaxKind[SyntaxKind["PublicKeyword"] = 112] = "PublicKeyword";
+        SyntaxKind[SyntaxKind["StaticKeyword"] = 113] = "StaticKeyword";
+        SyntaxKind[SyntaxKind["YieldKeyword"] = 114] = "YieldKeyword";
+        // Contextual keywords
+        SyntaxKind[SyntaxKind["AbstractKeyword"] = 115] = "AbstractKeyword";
+        SyntaxKind[SyntaxKind["AsKeyword"] = 116] = "AsKeyword";
+        SyntaxKind[SyntaxKind["AnyKeyword"] = 117] = "AnyKeyword";
+        SyntaxKind[SyntaxKind["AsyncKeyword"] = 118] = "AsyncKeyword";
+        SyntaxKind[SyntaxKind["AwaitKeyword"] = 119] = "AwaitKeyword";
+        SyntaxKind[SyntaxKind["BooleanKeyword"] = 120] = "BooleanKeyword";
+        SyntaxKind[SyntaxKind["ConstructorKeyword"] = 121] = "ConstructorKeyword";
+        SyntaxKind[SyntaxKind["DeclareKeyword"] = 122] = "DeclareKeyword";
+        SyntaxKind[SyntaxKind["GetKeyword"] = 123] = "GetKeyword";
+        SyntaxKind[SyntaxKind["IsKeyword"] = 124] = "IsKeyword";
+        SyntaxKind[SyntaxKind["ModuleKeyword"] = 125] = "ModuleKeyword";
+        SyntaxKind[SyntaxKind["NamespaceKeyword"] = 126] = "NamespaceKeyword";
+        SyntaxKind[SyntaxKind["NeverKeyword"] = 127] = "NeverKeyword";
+        SyntaxKind[SyntaxKind["ReadonlyKeyword"] = 128] = "ReadonlyKeyword";
+        SyntaxKind[SyntaxKind["RequireKeyword"] = 129] = "RequireKeyword";
+        SyntaxKind[SyntaxKind["NumberKeyword"] = 130] = "NumberKeyword";
+        SyntaxKind[SyntaxKind["SetKeyword"] = 131] = "SetKeyword";
+        SyntaxKind[SyntaxKind["StringKeyword"] = 132] = "StringKeyword";
+        SyntaxKind[SyntaxKind["SymbolKeyword"] = 133] = "SymbolKeyword";
+        SyntaxKind[SyntaxKind["TypeKeyword"] = 134] = "TypeKeyword";
+        SyntaxKind[SyntaxKind["UndefinedKeyword"] = 135] = "UndefinedKeyword";
+        SyntaxKind[SyntaxKind["FromKeyword"] = 136] = "FromKeyword";
+        SyntaxKind[SyntaxKind["GlobalKeyword"] = 137] = "GlobalKeyword";
+        SyntaxKind[SyntaxKind["OfKeyword"] = 138] = "OfKeyword";
+        // Parse tree nodes
+        // Names
+        SyntaxKind[SyntaxKind["QualifiedName"] = 139] = "QualifiedName";
+        SyntaxKind[SyntaxKind["ComputedPropertyName"] = 140] = "ComputedPropertyName";
+        // Signature elements
+        SyntaxKind[SyntaxKind["TypeParameter"] = 141] = "TypeParameter";
+        SyntaxKind[SyntaxKind["Parameter"] = 142] = "Parameter";
+        SyntaxKind[SyntaxKind["Decorator"] = 143] = "Decorator";
+        // TypeMember
+        SyntaxKind[SyntaxKind["PropertySignature"] = 144] = "PropertySignature";
+        SyntaxKind[SyntaxKind["PropertyDeclaration"] = 145] = "PropertyDeclaration";
+        SyntaxKind[SyntaxKind["MethodSignature"] = 146] = "MethodSignature";
+        SyntaxKind[SyntaxKind["MethodDeclaration"] = 147] = "MethodDeclaration";
+        SyntaxKind[SyntaxKind["Constructor"] = 148] = "Constructor";
+        SyntaxKind[SyntaxKind["GetAccessor"] = 149] = "GetAccessor";
+        SyntaxKind[SyntaxKind["SetAccessor"] = 150] = "SetAccessor";
+        SyntaxKind[SyntaxKind["CallSignature"] = 151] = "CallSignature";
+        SyntaxKind[SyntaxKind["ConstructSignature"] = 152] = "ConstructSignature";
+        SyntaxKind[SyntaxKind["IndexSignature"] = 153] = "IndexSignature";
+        // Type
+        SyntaxKind[SyntaxKind["TypePredicate"] = 154] = "TypePredicate";
+        SyntaxKind[SyntaxKind["TypeReference"] = 155] = "TypeReference";
+        SyntaxKind[SyntaxKind["FunctionType"] = 156] = "FunctionType";
+        SyntaxKind[SyntaxKind["ConstructorType"] = 157] = "ConstructorType";
+        SyntaxKind[SyntaxKind["TypeQuery"] = 158] = "TypeQuery";
+        SyntaxKind[SyntaxKind["TypeLiteral"] = 159] = "TypeLiteral";
+        SyntaxKind[SyntaxKind["ArrayType"] = 160] = "ArrayType";
+        SyntaxKind[SyntaxKind["TupleType"] = 161] = "TupleType";
+        SyntaxKind[SyntaxKind["UnionType"] = 162] = "UnionType";
+        SyntaxKind[SyntaxKind["IntersectionType"] = 163] = "IntersectionType";
+        SyntaxKind[SyntaxKind["ParenthesizedType"] = 164] = "ParenthesizedType";
+        SyntaxKind[SyntaxKind["ThisType"] = 165] = "ThisType";
+        SyntaxKind[SyntaxKind["StringLiteralType"] = 166] = "StringLiteralType";
+        // Binding patterns
+        SyntaxKind[SyntaxKind["ObjectBindingPattern"] = 167] = "ObjectBindingPattern";
+        SyntaxKind[SyntaxKind["ArrayBindingPattern"] = 168] = "ArrayBindingPattern";
+        SyntaxKind[SyntaxKind["BindingElement"] = 169] = "BindingElement";
+        // Expression
+        SyntaxKind[SyntaxKind["ArrayLiteralExpression"] = 170] = "ArrayLiteralExpression";
+        SyntaxKind[SyntaxKind["ObjectLiteralExpression"] = 171] = "ObjectLiteralExpression";
+        SyntaxKind[SyntaxKind["PropertyAccessExpression"] = 172] = "PropertyAccessExpression";
+        SyntaxKind[SyntaxKind["ElementAccessExpression"] = 173] = "ElementAccessExpression";
+        SyntaxKind[SyntaxKind["CallExpression"] = 174] = "CallExpression";
+        SyntaxKind[SyntaxKind["NewExpression"] = 175] = "NewExpression";
+        SyntaxKind[SyntaxKind["TaggedTemplateExpression"] = 176] = "TaggedTemplateExpression";
+        SyntaxKind[SyntaxKind["TypeAssertionExpression"] = 177] = "TypeAssertionExpression";
+        SyntaxKind[SyntaxKind["ParenthesizedExpression"] = 178] = "ParenthesizedExpression";
+        SyntaxKind[SyntaxKind["FunctionExpression"] = 179] = "FunctionExpression";
+        SyntaxKind[SyntaxKind["ArrowFunction"] = 180] = "ArrowFunction";
+        SyntaxKind[SyntaxKind["DeleteExpression"] = 181] = "DeleteExpression";
+        SyntaxKind[SyntaxKind["TypeOfExpression"] = 182] = "TypeOfExpression";
+        SyntaxKind[SyntaxKind["VoidExpression"] = 183] = "VoidExpression";
+        SyntaxKind[SyntaxKind["AwaitExpression"] = 184] = "AwaitExpression";
+        SyntaxKind[SyntaxKind["PrefixUnaryExpression"] = 185] = "PrefixUnaryExpression";
+        SyntaxKind[SyntaxKind["PostfixUnaryExpression"] = 186] = "PostfixUnaryExpression";
+        SyntaxKind[SyntaxKind["BinaryExpression"] = 187] = "BinaryExpression";
+        SyntaxKind[SyntaxKind["ConditionalExpression"] = 188] = "ConditionalExpression";
+        SyntaxKind[SyntaxKind["TemplateExpression"] = 189] = "TemplateExpression";
+        SyntaxKind[SyntaxKind["YieldExpression"] = 190] = "YieldExpression";
+        SyntaxKind[SyntaxKind["SpreadElementExpression"] = 191] = "SpreadElementExpression";
+        SyntaxKind[SyntaxKind["ClassExpression"] = 192] = "ClassExpression";
+        SyntaxKind[SyntaxKind["OmittedExpression"] = 193] = "OmittedExpression";
+        SyntaxKind[SyntaxKind["ExpressionWithTypeArguments"] = 194] = "ExpressionWithTypeArguments";
+        SyntaxKind[SyntaxKind["AsExpression"] = 195] = "AsExpression";
+        SyntaxKind[SyntaxKind["NonNullExpression"] = 196] = "NonNullExpression";
+        // Misc
+        SyntaxKind[SyntaxKind["TemplateSpan"] = 197] = "TemplateSpan";
+        SyntaxKind[SyntaxKind["SemicolonClassElement"] = 198] = "SemicolonClassElement";
+        // Element
+        SyntaxKind[SyntaxKind["Block"] = 199] = "Block";
+        SyntaxKind[SyntaxKind["VariableStatement"] = 200] = "VariableStatement";
+        SyntaxKind[SyntaxKind["EmptyStatement"] = 201] = "EmptyStatement";
+        SyntaxKind[SyntaxKind["ExpressionStatement"] = 202] = "ExpressionStatement";
+        SyntaxKind[SyntaxKind["IfStatement"] = 203] = "IfStatement";
+        SyntaxKind[SyntaxKind["DoStatement"] = 204] = "DoStatement";
+        SyntaxKind[SyntaxKind["WhileStatement"] = 205] = "WhileStatement";
+        SyntaxKind[SyntaxKind["ForStatement"] = 206] = "ForStatement";
+        SyntaxKind[SyntaxKind["ForInStatement"] = 207] = "ForInStatement";
+        SyntaxKind[SyntaxKind["ForOfStatement"] = 208] = "ForOfStatement";
+        SyntaxKind[SyntaxKind["ContinueStatement"] = 209] = "ContinueStatement";
+        SyntaxKind[SyntaxKind["BreakStatement"] = 210] = "BreakStatement";
+        SyntaxKind[SyntaxKind["ReturnStatement"] = 211] = "ReturnStatement";
+        SyntaxKind[SyntaxKind["WithStatement"] = 212] = "WithStatement";
+        SyntaxKind[SyntaxKind["SwitchStatement"] = 213] = "SwitchStatement";
+        SyntaxKind[SyntaxKind["LabeledStatement"] = 214] = "LabeledStatement";
+        SyntaxKind[SyntaxKind["ThrowStatement"] = 215] = "ThrowStatement";
+        SyntaxKind[SyntaxKind["TryStatement"] = 216] = "TryStatement";
+        SyntaxKind[SyntaxKind["DebuggerStatement"] = 217] = "DebuggerStatement";
+        SyntaxKind[SyntaxKind["VariableDeclaration"] = 218] = "VariableDeclaration";
+        SyntaxKind[SyntaxKind["VariableDeclarationList"] = 219] = "VariableDeclarationList";
+        SyntaxKind[SyntaxKind["FunctionDeclaration"] = 220] = "FunctionDeclaration";
+        SyntaxKind[SyntaxKind["ClassDeclaration"] = 221] = "ClassDeclaration";
+        SyntaxKind[SyntaxKind["InterfaceDeclaration"] = 222] = "InterfaceDeclaration";
+        SyntaxKind[SyntaxKind["TypeAliasDeclaration"] = 223] = "TypeAliasDeclaration";
+        SyntaxKind[SyntaxKind["EnumDeclaration"] = 224] = "EnumDeclaration";
+        SyntaxKind[SyntaxKind["ModuleDeclaration"] = 225] = "ModuleDeclaration";
+        SyntaxKind[SyntaxKind["ModuleBlock"] = 226] = "ModuleBlock";
+        SyntaxKind[SyntaxKind["CaseBlock"] = 227] = "CaseBlock";
+        SyntaxKind[SyntaxKind["NamespaceExportDeclaration"] = 228] = "NamespaceExportDeclaration";
+        SyntaxKind[SyntaxKind["ImportEqualsDeclaration"] = 229] = "ImportEqualsDeclaration";
+        SyntaxKind[SyntaxKind["ImportDeclaration"] = 230] = "ImportDeclaration";
+        SyntaxKind[SyntaxKind["ImportClause"] = 231] = "ImportClause";
+        SyntaxKind[SyntaxKind["NamespaceImport"] = 232] = "NamespaceImport";
+        SyntaxKind[SyntaxKind["NamedImports"] = 233] = "NamedImports";
+        SyntaxKind[SyntaxKind["ImportSpecifier"] = 234] = "ImportSpecifier";
+        SyntaxKind[SyntaxKind["ExportAssignment"] = 235] = "ExportAssignment";
+        SyntaxKind[SyntaxKind["ExportDeclaration"] = 236] = "ExportDeclaration";
+        SyntaxKind[SyntaxKind["NamedExports"] = 237] = "NamedExports";
+        SyntaxKind[SyntaxKind["ExportSpecifier"] = 238] = "ExportSpecifier";
+        SyntaxKind[SyntaxKind["MissingDeclaration"] = 239] = "MissingDeclaration";
+        // Module references
+        SyntaxKind[SyntaxKind["ExternalModuleReference"] = 240] = "ExternalModuleReference";
+        // JSX
+        SyntaxKind[SyntaxKind["JsxElement"] = 241] = "JsxElement";
+        SyntaxKind[SyntaxKind["JsxSelfClosingElement"] = 242] = "JsxSelfClosingElement";
+        SyntaxKind[SyntaxKind["JsxOpeningElement"] = 243] = "JsxOpeningElement";
+        SyntaxKind[SyntaxKind["JsxText"] = 244] = "JsxText";
+        SyntaxKind[SyntaxKind["JsxClosingElement"] = 245] = "JsxClosingElement";
+        SyntaxKind[SyntaxKind["JsxAttribute"] = 246] = "JsxAttribute";
+        SyntaxKind[SyntaxKind["JsxSpreadAttribute"] = 247] = "JsxSpreadAttribute";
+        SyntaxKind[SyntaxKind["JsxExpression"] = 248] = "JsxExpression";
+        // Clauses
+        SyntaxKind[SyntaxKind["CaseClause"] = 249] = "CaseClause";
+        SyntaxKind[SyntaxKind["DefaultClause"] = 250] = "DefaultClause";
+        SyntaxKind[SyntaxKind["HeritageClause"] = 251] = "HeritageClause";
+        SyntaxKind[SyntaxKind["CatchClause"] = 252] = "CatchClause";
+        // Property assignments
+        SyntaxKind[SyntaxKind["PropertyAssignment"] = 253] = "PropertyAssignment";
+        SyntaxKind[SyntaxKind["ShorthandPropertyAssignment"] = 254] = "ShorthandPropertyAssignment";
+        // Enum
+        SyntaxKind[SyntaxKind["EnumMember"] = 255] = "EnumMember";
+        // Top-level nodes
+        SyntaxKind[SyntaxKind["SourceFile"] = 256] = "SourceFile";
+        // JSDoc nodes
+        SyntaxKind[SyntaxKind["JSDocTypeExpression"] = 257] = "JSDocTypeExpression";
+        // The * type
+        SyntaxKind[SyntaxKind["JSDocAllType"] = 258] = "JSDocAllType";
+        // The ? type
+        SyntaxKind[SyntaxKind["JSDocUnknownType"] = 259] = "JSDocUnknownType";
+        SyntaxKind[SyntaxKind["JSDocArrayType"] = 260] = "JSDocArrayType";
+        SyntaxKind[SyntaxKind["JSDocUnionType"] = 261] = "JSDocUnionType";
+        SyntaxKind[SyntaxKind["JSDocTupleType"] = 262] = "JSDocTupleType";
+        SyntaxKind[SyntaxKind["JSDocNullableType"] = 263] = "JSDocNullableType";
+        SyntaxKind[SyntaxKind["JSDocNonNullableType"] = 264] = "JSDocNonNullableType";
+        SyntaxKind[SyntaxKind["JSDocRecordType"] = 265] = "JSDocRecordType";
+        SyntaxKind[SyntaxKind["JSDocRecordMember"] = 266] = "JSDocRecordMember";
+        SyntaxKind[SyntaxKind["JSDocTypeReference"] = 267] = "JSDocTypeReference";
+        SyntaxKind[SyntaxKind["JSDocOptionalType"] = 268] = "JSDocOptionalType";
+        SyntaxKind[SyntaxKind["JSDocFunctionType"] = 269] = "JSDocFunctionType";
+        SyntaxKind[SyntaxKind["JSDocVariadicType"] = 270] = "JSDocVariadicType";
+        SyntaxKind[SyntaxKind["JSDocConstructorType"] = 271] = "JSDocConstructorType";
+        SyntaxKind[SyntaxKind["JSDocThisType"] = 272] = "JSDocThisType";
+        SyntaxKind[SyntaxKind["JSDocComment"] = 273] = "JSDocComment";
+        SyntaxKind[SyntaxKind["JSDocTag"] = 274] = "JSDocTag";
+        SyntaxKind[SyntaxKind["JSDocParameterTag"] = 275] = "JSDocParameterTag";
+        SyntaxKind[SyntaxKind["JSDocReturnTag"] = 276] = "JSDocReturnTag";
+        SyntaxKind[SyntaxKind["JSDocTypeTag"] = 277] = "JSDocTypeTag";
+        SyntaxKind[SyntaxKind["JSDocTemplateTag"] = 278] = "JSDocTemplateTag";
+        SyntaxKind[SyntaxKind["JSDocTypedefTag"] = 279] = "JSDocTypedefTag";
+        SyntaxKind[SyntaxKind["JSDocPropertyTag"] = 280] = "JSDocPropertyTag";
+        SyntaxKind[SyntaxKind["JSDocTypeLiteral"] = 281] = "JSDocTypeLiteral";
+        // Synthesized list
+        SyntaxKind[SyntaxKind["SyntaxList"] = 282] = "SyntaxList";
+        // Enum value count
+        SyntaxKind[SyntaxKind["Count"] = 283] = "Count";
+        // Markers
+        SyntaxKind[SyntaxKind["FirstAssignment"] = 56] = "FirstAssignment";
+        SyntaxKind[SyntaxKind["LastAssignment"] = 68] = "LastAssignment";
+        SyntaxKind[SyntaxKind["FirstReservedWord"] = 70] = "FirstReservedWord";
+        SyntaxKind[SyntaxKind["LastReservedWord"] = 105] = "LastReservedWord";
+        SyntaxKind[SyntaxKind["FirstKeyword"] = 70] = "FirstKeyword";
+        SyntaxKind[SyntaxKind["LastKeyword"] = 138] = "LastKeyword";
+        SyntaxKind[SyntaxKind["FirstFutureReservedWord"] = 106] = "FirstFutureReservedWord";
+        SyntaxKind[SyntaxKind["LastFutureReservedWord"] = 114] = "LastFutureReservedWord";
+        SyntaxKind[SyntaxKind["FirstTypeNode"] = 154] = "FirstTypeNode";
+        SyntaxKind[SyntaxKind["LastTypeNode"] = 166] = "LastTypeNode";
+        SyntaxKind[SyntaxKind["FirstPunctuation"] = 15] = "FirstPunctuation";
+        SyntaxKind[SyntaxKind["LastPunctuation"] = 68] = "LastPunctuation";
+        SyntaxKind[SyntaxKind["FirstToken"] = 0] = "FirstToken";
+        SyntaxKind[SyntaxKind["LastToken"] = 138] = "LastToken";
+        SyntaxKind[SyntaxKind["FirstTriviaToken"] = 2] = "FirstTriviaToken";
+        SyntaxKind[SyntaxKind["LastTriviaToken"] = 7] = "LastTriviaToken";
+        SyntaxKind[SyntaxKind["FirstLiteralToken"] = 8] = "FirstLiteralToken";
+        SyntaxKind[SyntaxKind["LastLiteralToken"] = 11] = "LastLiteralToken";
+        SyntaxKind[SyntaxKind["FirstTemplateToken"] = 11] = "FirstTemplateToken";
+        SyntaxKind[SyntaxKind["LastTemplateToken"] = 14] = "LastTemplateToken";
+        SyntaxKind[SyntaxKind["FirstBinaryOperator"] = 25] = "FirstBinaryOperator";
+        SyntaxKind[SyntaxKind["LastBinaryOperator"] = 68] = "LastBinaryOperator";
+        SyntaxKind[SyntaxKind["FirstNode"] = 139] = "FirstNode";
+        SyntaxKind[SyntaxKind["FirstJSDocNode"] = 257] = "FirstJSDocNode";
+        SyntaxKind[SyntaxKind["LastJSDocNode"] = 281] = "LastJSDocNode";
+        SyntaxKind[SyntaxKind["FirstJSDocTagNode"] = 273] = "FirstJSDocTagNode";
+        SyntaxKind[SyntaxKind["LastJSDocTagNode"] = 281] = "LastJSDocTagNode";
+    })(ts.SyntaxKind || (ts.SyntaxKind = {}));
+    var SyntaxKind = ts.SyntaxKind;
+    (function (NodeFlags) {
+        NodeFlags[NodeFlags["None"] = 0] = "None";
+        NodeFlags[NodeFlags["Export"] = 1] = "Export";
+        NodeFlags[NodeFlags["Ambient"] = 2] = "Ambient";
+        NodeFlags[NodeFlags["Public"] = 4] = "Public";
+        NodeFlags[NodeFlags["Private"] = 8] = "Private";
+        NodeFlags[NodeFlags["Protected"] = 16] = "Protected";
+        NodeFlags[NodeFlags["Static"] = 32] = "Static";
+        NodeFlags[NodeFlags["Readonly"] = 64] = "Readonly";
+        NodeFlags[NodeFlags["Abstract"] = 128] = "Abstract";
+        NodeFlags[NodeFlags["Async"] = 256] = "Async";
+        NodeFlags[NodeFlags["Default"] = 512] = "Default";
+        NodeFlags[NodeFlags["Let"] = 1024] = "Let";
+        NodeFlags[NodeFlags["Const"] = 2048] = "Const";
+        NodeFlags[NodeFlags["Namespace"] = 4096] = "Namespace";
+        NodeFlags[NodeFlags["ExportContext"] = 8192] = "ExportContext";
+        NodeFlags[NodeFlags["ContainsThis"] = 16384] = "ContainsThis";
+        NodeFlags[NodeFlags["HasImplicitReturn"] = 32768] = "HasImplicitReturn";
+        NodeFlags[NodeFlags["HasExplicitReturn"] = 65536] = "HasExplicitReturn";
+        NodeFlags[NodeFlags["GlobalAugmentation"] = 131072] = "GlobalAugmentation";
+        NodeFlags[NodeFlags["HasClassExtends"] = 262144] = "HasClassExtends";
+        NodeFlags[NodeFlags["HasDecorators"] = 524288] = "HasDecorators";
+        NodeFlags[NodeFlags["HasParamDecorators"] = 1048576] = "HasParamDecorators";
+        NodeFlags[NodeFlags["HasAsyncFunctions"] = 2097152] = "HasAsyncFunctions";
+        NodeFlags[NodeFlags["DisallowInContext"] = 4194304] = "DisallowInContext";
+        NodeFlags[NodeFlags["YieldContext"] = 8388608] = "YieldContext";
+        NodeFlags[NodeFlags["DecoratorContext"] = 16777216] = "DecoratorContext";
+        NodeFlags[NodeFlags["AwaitContext"] = 33554432] = "AwaitContext";
+        NodeFlags[NodeFlags["ThisNodeHasError"] = 67108864] = "ThisNodeHasError";
+        NodeFlags[NodeFlags["JavaScriptFile"] = 134217728] = "JavaScriptFile";
+        NodeFlags[NodeFlags["ThisNodeOrAnySubNodesHasError"] = 268435456] = "ThisNodeOrAnySubNodesHasError";
+        NodeFlags[NodeFlags["HasAggregatedChildData"] = 536870912] = "HasAggregatedChildData";
+        NodeFlags[NodeFlags["HasJsxSpreadAttribute"] = 1073741824] = "HasJsxSpreadAttribute";
+        NodeFlags[NodeFlags["Modifier"] = 1023] = "Modifier";
+        NodeFlags[NodeFlags["AccessibilityModifier"] = 28] = "AccessibilityModifier";
+        // Accessibility modifiers and 'readonly' can be attached to a parameter in a constructor to make it a property.
+        NodeFlags[NodeFlags["ParameterPropertyModifier"] = 92] = "ParameterPropertyModifier";
+        NodeFlags[NodeFlags["BlockScoped"] = 3072] = "BlockScoped";
+        NodeFlags[NodeFlags["ReachabilityCheckFlags"] = 98304] = "ReachabilityCheckFlags";
+        NodeFlags[NodeFlags["EmitHelperFlags"] = 3932160] = "EmitHelperFlags";
+        NodeFlags[NodeFlags["ReachabilityAndEmitFlags"] = 4030464] = "ReachabilityAndEmitFlags";
+        // Parsing context flags
+        NodeFlags[NodeFlags["ContextFlags"] = 197132288] = "ContextFlags";
+        // Exclude these flags when parsing a Type
+        NodeFlags[NodeFlags["TypeExcludesFlags"] = 41943040] = "TypeExcludesFlags";
+    })(ts.NodeFlags || (ts.NodeFlags = {}));
+    var NodeFlags = ts.NodeFlags;
+    (function (JsxFlags) {
+        JsxFlags[JsxFlags["None"] = 0] = "None";
+        /** An element from a named property of the JSX.IntrinsicElements interface */
+        JsxFlags[JsxFlags["IntrinsicNamedElement"] = 1] = "IntrinsicNamedElement";
+        /** An element inferred from the string index signature of the JSX.IntrinsicElements interface */
+        JsxFlags[JsxFlags["IntrinsicIndexedElement"] = 2] = "IntrinsicIndexedElement";
+        JsxFlags[JsxFlags["IntrinsicElement"] = 3] = "IntrinsicElement";
+    })(ts.JsxFlags || (ts.JsxFlags = {}));
+    var JsxFlags = ts.JsxFlags;
+    /* @internal */
+    (function (RelationComparisonResult) {
+        RelationComparisonResult[RelationComparisonResult["Succeeded"] = 1] = "Succeeded";
+        RelationComparisonResult[RelationComparisonResult["Failed"] = 2] = "Failed";
+        RelationComparisonResult[RelationComparisonResult["FailedAndReported"] = 3] = "FailedAndReported";
+    })(ts.RelationComparisonResult || (ts.RelationComparisonResult = {}));
+    var RelationComparisonResult = ts.RelationComparisonResult;
+    (function (FlowFlags) {
+        FlowFlags[FlowFlags["Unreachable"] = 1] = "Unreachable";
+        FlowFlags[FlowFlags["Start"] = 2] = "Start";
+        FlowFlags[FlowFlags["BranchLabel"] = 4] = "BranchLabel";
+        FlowFlags[FlowFlags["LoopLabel"] = 8] = "LoopLabel";
+        FlowFlags[FlowFlags["Assignment"] = 16] = "Assignment";
+        FlowFlags[FlowFlags["TrueCondition"] = 32] = "TrueCondition";
+        FlowFlags[FlowFlags["FalseCondition"] = 64] = "FalseCondition";
+        FlowFlags[FlowFlags["Referenced"] = 128] = "Referenced";
+        FlowFlags[FlowFlags["Shared"] = 256] = "Shared";
+        FlowFlags[FlowFlags["Label"] = 12] = "Label";
+        FlowFlags[FlowFlags["Condition"] = 96] = "Condition";
+    })(ts.FlowFlags || (ts.FlowFlags = {}));
+    var FlowFlags = ts.FlowFlags;
+    var OperationCanceledException = (function () {
+        function OperationCanceledException() {
+        }
+        return OperationCanceledException;
+    }());
+    ts.OperationCanceledException = OperationCanceledException;
+    /** Return code used by getEmitOutput function to indicate status of the function */
+    (function (ExitStatus) {
+        // Compiler ran successfully.  Either this was a simple do-nothing compilation (for example,
+        // when -version or -help was provided, or this was a normal compilation, no diagnostics
+        // were produced, and all outputs were generated successfully.
+        ExitStatus[ExitStatus["Success"] = 0] = "Success";
+        // Diagnostics were produced and because of them no code was generated.
+        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsSkipped"] = 1] = "DiagnosticsPresent_OutputsSkipped";
+        // Diagnostics were produced and outputs were generated in spite of them.
+        ExitStatus[ExitStatus["DiagnosticsPresent_OutputsGenerated"] = 2] = "DiagnosticsPresent_OutputsGenerated";
+    })(ts.ExitStatus || (ts.ExitStatus = {}));
+    var ExitStatus = ts.ExitStatus;
+    (function (TypeFormatFlags) {
+        TypeFormatFlags[TypeFormatFlags["None"] = 0] = "None";
+        TypeFormatFlags[TypeFormatFlags["WriteArrayAsGenericType"] = 1] = "WriteArrayAsGenericType";
+        TypeFormatFlags[TypeFormatFlags["UseTypeOfFunction"] = 2] = "UseTypeOfFunction";
+        TypeFormatFlags[TypeFormatFlags["NoTruncation"] = 4] = "NoTruncation";
+        TypeFormatFlags[TypeFormatFlags["WriteArrowStyleSignature"] = 8] = "WriteArrowStyleSignature";
+        TypeFormatFlags[TypeFormatFlags["WriteOwnNameForAnyLike"] = 16] = "WriteOwnNameForAnyLike";
+        TypeFormatFlags[TypeFormatFlags["WriteTypeArgumentsOfSignature"] = 32] = "WriteTypeArgumentsOfSignature";
+        TypeFormatFlags[TypeFormatFlags["InElementType"] = 64] = "InElementType";
+        TypeFormatFlags[TypeFormatFlags["UseFullyQualifiedType"] = 128] = "UseFullyQualifiedType";
+        TypeFormatFlags[TypeFormatFlags["InFirstTypeArgument"] = 256] = "InFirstTypeArgument";
+    })(ts.TypeFormatFlags || (ts.TypeFormatFlags = {}));
+    var TypeFormatFlags = ts.TypeFormatFlags;
+    (function (SymbolFormatFlags) {
+        SymbolFormatFlags[SymbolFormatFlags["None"] = 0] = "None";
+        // Write symbols's type argument if it is instantiated symbol
+        // eg. class C<T> { p: T }   <-- Show p as C<T>.p here
+        //     var a: C<number>;
+        //     var p = a.p;  <--- Here p is property of C<number> so show it as C<number>.p instead of just C.p
+        SymbolFormatFlags[SymbolFormatFlags["WriteTypeParametersOrArguments"] = 1] = "WriteTypeParametersOrArguments";
+        // Use only external alias information to get the symbol name in the given context
+        // eg.  module m { export class c { } } import x = m.c;
+        // When this flag is specified m.c will be used to refer to the class instead of alias symbol x
+        SymbolFormatFlags[SymbolFormatFlags["UseOnlyExternalAliasing"] = 2] = "UseOnlyExternalAliasing";
+    })(ts.SymbolFormatFlags || (ts.SymbolFormatFlags = {}));
+    var SymbolFormatFlags = ts.SymbolFormatFlags;
+    /* @internal */
+    (function (SymbolAccessibility) {
+        SymbolAccessibility[SymbolAccessibility["Accessible"] = 0] = "Accessible";
+        SymbolAccessibility[SymbolAccessibility["NotAccessible"] = 1] = "NotAccessible";
+        SymbolAccessibility[SymbolAccessibility["CannotBeNamed"] = 2] = "CannotBeNamed";
+    })(ts.SymbolAccessibility || (ts.SymbolAccessibility = {}));
+    var SymbolAccessibility = ts.SymbolAccessibility;
+    (function (TypePredicateKind) {
+        TypePredicateKind[TypePredicateKind["This"] = 0] = "This";
+        TypePredicateKind[TypePredicateKind["Identifier"] = 1] = "Identifier";
+    })(ts.TypePredicateKind || (ts.TypePredicateKind = {}));
+    var TypePredicateKind = ts.TypePredicateKind;
+    /** Indicates how to serialize the name for a TypeReferenceNode when emitting decorator
+      * metadata */
+    /* @internal */
+    (function (TypeReferenceSerializationKind) {
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["Unknown"] = 0] = "Unknown";
+        // should be emitted using a safe fallback.
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithConstructSignatureAndValue"] = 1] = "TypeWithConstructSignatureAndValue";
+        // function that can be reached at runtime (e.g. a `class`
+        // declaration or a `var` declaration for the static side
+        // of a type, such as the global `Promise` type in lib.d.ts).
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["VoidType"] = 2] = "VoidType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["NumberLikeType"] = 3] = "NumberLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["StringLikeType"] = 4] = "StringLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["BooleanType"] = 5] = "BooleanType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ArrayLikeType"] = 6] = "ArrayLikeType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ESSymbolType"] = 7] = "ESSymbolType";
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["TypeWithCallSignature"] = 8] = "TypeWithCallSignature";
+        // with call signatures.
+        TypeReferenceSerializationKind[TypeReferenceSerializationKind["ObjectType"] = 9] = "ObjectType";
+    })(ts.TypeReferenceSerializationKind || (ts.TypeReferenceSerializationKind = {}));
+    var TypeReferenceSerializationKind = ts.TypeReferenceSerializationKind;
+    (function (SymbolFlags) {
+        SymbolFlags[SymbolFlags["None"] = 0] = "None";
+        SymbolFlags[SymbolFlags["FunctionScopedVariable"] = 1] = "FunctionScopedVariable";
+        SymbolFlags[SymbolFlags["BlockScopedVariable"] = 2] = "BlockScopedVariable";
+        SymbolFlags[SymbolFlags["Property"] = 4] = "Property";
+        SymbolFlags[SymbolFlags["EnumMember"] = 8] = "EnumMember";
+        SymbolFlags[SymbolFlags["Function"] = 16] = "Function";
+        SymbolFlags[SymbolFlags["Class"] = 32] = "Class";
+        SymbolFlags[SymbolFlags["Interface"] = 64] = "Interface";
+        SymbolFlags[SymbolFlags["ConstEnum"] = 128] = "ConstEnum";
+        SymbolFlags[SymbolFlags["RegularEnum"] = 256] = "RegularEnum";
+        SymbolFlags[SymbolFlags["ValueModule"] = 512] = "ValueModule";
+        SymbolFlags[SymbolFlags["NamespaceModule"] = 1024] = "NamespaceModule";
+        SymbolFlags[SymbolFlags["TypeLiteral"] = 2048] = "TypeLiteral";
+        SymbolFlags[SymbolFlags["ObjectLiteral"] = 4096] = "ObjectLiteral";
+        SymbolFlags[SymbolFlags["Method"] = 8192] = "Method";
+        SymbolFlags[SymbolFlags["Constructor"] = 16384] = "Constructor";
+        SymbolFlags[SymbolFlags["GetAccessor"] = 32768] = "GetAccessor";
+        SymbolFlags[SymbolFlags["SetAccessor"] = 65536] = "SetAccessor";
+        SymbolFlags[SymbolFlags["Signature"] = 131072] = "Signature";
+        SymbolFlags[SymbolFlags["TypeParameter"] = 262144] = "TypeParameter";
+        SymbolFlags[SymbolFlags["TypeAlias"] = 524288] = "TypeAlias";
+        SymbolFlags[SymbolFlags["ExportValue"] = 1048576] = "ExportValue";
+        SymbolFlags[SymbolFlags["ExportType"] = 2097152] = "ExportType";
+        SymbolFlags[SymbolFlags["ExportNamespace"] = 4194304] = "ExportNamespace";
+        SymbolFlags[SymbolFlags["Alias"] = 8388608] = "Alias";
+        SymbolFlags[SymbolFlags["Instantiated"] = 16777216] = "Instantiated";
+        SymbolFlags[SymbolFlags["Merged"] = 33554432] = "Merged";
+        SymbolFlags[SymbolFlags["Transient"] = 67108864] = "Transient";
+        SymbolFlags[SymbolFlags["Prototype"] = 134217728] = "Prototype";
+        SymbolFlags[SymbolFlags["SyntheticProperty"] = 268435456] = "SyntheticProperty";
+        SymbolFlags[SymbolFlags["Optional"] = 536870912] = "Optional";
+        SymbolFlags[SymbolFlags["ExportStar"] = 1073741824] = "ExportStar";
+        SymbolFlags[SymbolFlags["Enum"] = 384] = "Enum";
+        SymbolFlags[SymbolFlags["Variable"] = 3] = "Variable";
+        SymbolFlags[SymbolFlags["Value"] = 107455] = "Value";
+        SymbolFlags[SymbolFlags["Type"] = 793056] = "Type";
+        SymbolFlags[SymbolFlags["Namespace"] = 1536] = "Namespace";
+        SymbolFlags[SymbolFlags["Module"] = 1536] = "Module";
+        SymbolFlags[SymbolFlags["Accessor"] = 98304] = "Accessor";
+        // Variables can be redeclared, but can not redeclare a block-scoped declaration with the
+        // same name, or any other value that is not a variable, e.g. ValueModule or Class
+        SymbolFlags[SymbolFlags["FunctionScopedVariableExcludes"] = 107454] = "FunctionScopedVariableExcludes";
+        // Block-scoped declarations are not allowed to be re-declared
+        // they can not merge with anything in the value space
+        SymbolFlags[SymbolFlags["BlockScopedVariableExcludes"] = 107455] = "BlockScopedVariableExcludes";
+        SymbolFlags[SymbolFlags["ParameterExcludes"] = 107455] = "ParameterExcludes";
+        SymbolFlags[SymbolFlags["PropertyExcludes"] = 0] = "PropertyExcludes";
+        SymbolFlags[SymbolFlags["EnumMemberExcludes"] = 107455] = "EnumMemberExcludes";
+        SymbolFlags[SymbolFlags["FunctionExcludes"] = 106927] = "FunctionExcludes";
+        SymbolFlags[SymbolFlags["ClassExcludes"] = 899519] = "ClassExcludes";
+        SymbolFlags[SymbolFlags["InterfaceExcludes"] = 792960] = "InterfaceExcludes";
+        SymbolFlags[SymbolFlags["RegularEnumExcludes"] = 899327] = "RegularEnumExcludes";
+        SymbolFlags[SymbolFlags["ConstEnumExcludes"] = 899967] = "ConstEnumExcludes";
+        SymbolFlags[SymbolFlags["ValueModuleExcludes"] = 106639] = "ValueModuleExcludes";
+        SymbolFlags[SymbolFlags["NamespaceModuleExcludes"] = 0] = "NamespaceModuleExcludes";
+        SymbolFlags[SymbolFlags["MethodExcludes"] = 99263] = "MethodExcludes";
+        SymbolFlags[SymbolFlags["GetAccessorExcludes"] = 41919] = "GetAccessorExcludes";
+        SymbolFlags[SymbolFlags["SetAccessorExcludes"] = 74687] = "SetAccessorExcludes";
+        SymbolFlags[SymbolFlags["TypeParameterExcludes"] = 530912] = "TypeParameterExcludes";
+        SymbolFlags[SymbolFlags["TypeAliasExcludes"] = 793056] = "TypeAliasExcludes";
+        SymbolFlags[SymbolFlags["AliasExcludes"] = 8388608] = "AliasExcludes";
+        SymbolFlags[SymbolFlags["ModuleMember"] = 8914931] = "ModuleMember";
+        SymbolFlags[SymbolFlags["ExportHasLocal"] = 944] = "ExportHasLocal";
+        SymbolFlags[SymbolFlags["HasExports"] = 1952] = "HasExports";
+        SymbolFlags[SymbolFlags["HasMembers"] = 6240] = "HasMembers";
+        SymbolFlags[SymbolFlags["BlockScoped"] = 418] = "BlockScoped";
+        SymbolFlags[SymbolFlags["PropertyOrAccessor"] = 98308] = "PropertyOrAccessor";
+        SymbolFlags[SymbolFlags["Export"] = 7340032] = "Export";
+        /* @internal */
+        // The set of things we consider semantically classifiable.  Used to speed up the LS during
+        // classification.
+        SymbolFlags[SymbolFlags["Classifiable"] = 788448] = "Classifiable";
+    })(ts.SymbolFlags || (ts.SymbolFlags = {}));
+    var SymbolFlags = ts.SymbolFlags;
+    /* @internal */
+    (function (NodeCheckFlags) {
+        NodeCheckFlags[NodeCheckFlags["TypeChecked"] = 1] = "TypeChecked";
+        NodeCheckFlags[NodeCheckFlags["LexicalThis"] = 2] = "LexicalThis";
+        NodeCheckFlags[NodeCheckFlags["CaptureThis"] = 4] = "CaptureThis";
+        NodeCheckFlags[NodeCheckFlags["SuperInstance"] = 256] = "SuperInstance";
+        NodeCheckFlags[NodeCheckFlags["SuperStatic"] = 512] = "SuperStatic";
+        NodeCheckFlags[NodeCheckFlags["ContextChecked"] = 1024] = "ContextChecked";
+        NodeCheckFlags[NodeCheckFlags["AsyncMethodWithSuper"] = 2048] = "AsyncMethodWithSuper";
+        NodeCheckFlags[NodeCheckFlags["AsyncMethodWithSuperBinding"] = 4096] = "AsyncMethodWithSuperBinding";
+        NodeCheckFlags[NodeCheckFlags["CaptureArguments"] = 8192] = "CaptureArguments";
+        NodeCheckFlags[NodeCheckFlags["EnumValuesComputed"] = 16384] = "EnumValuesComputed";
+        NodeCheckFlags[NodeCheckFlags["LexicalModuleMergesWithClass"] = 32768] = "LexicalModuleMergesWithClass";
+        NodeCheckFlags[NodeCheckFlags["LoopWithCapturedBlockScopedBinding"] = 65536] = "LoopWithCapturedBlockScopedBinding";
+        NodeCheckFlags[NodeCheckFlags["CapturedBlockScopedBinding"] = 131072] = "CapturedBlockScopedBinding";
+        NodeCheckFlags[NodeCheckFlags["BlockScopedBindingInLoop"] = 262144] = "BlockScopedBindingInLoop";
+        NodeCheckFlags[NodeCheckFlags["ClassWithBodyScopedClassBinding"] = 524288] = "ClassWithBodyScopedClassBinding";
+        NodeCheckFlags[NodeCheckFlags["BodyScopedClassBinding"] = 1048576] = "BodyScopedClassBinding";
+        NodeCheckFlags[NodeCheckFlags["NeedsLoopOutParameter"] = 2097152] = "NeedsLoopOutParameter";
+    })(ts.NodeCheckFlags || (ts.NodeCheckFlags = {}));
+    var NodeCheckFlags = ts.NodeCheckFlags;
+    (function (TypeFlags) {
+        TypeFlags[TypeFlags["Any"] = 1] = "Any";
+        TypeFlags[TypeFlags["String"] = 2] = "String";
+        TypeFlags[TypeFlags["Number"] = 4] = "Number";
+        TypeFlags[TypeFlags["Boolean"] = 8] = "Boolean";
+        TypeFlags[TypeFlags["Void"] = 16] = "Void";
+        TypeFlags[TypeFlags["Undefined"] = 32] = "Undefined";
+        TypeFlags[TypeFlags["Null"] = 64] = "Null";
+        TypeFlags[TypeFlags["Enum"] = 128] = "Enum";
+        TypeFlags[TypeFlags["StringLiteral"] = 256] = "StringLiteral";
+        TypeFlags[TypeFlags["TypeParameter"] = 512] = "TypeParameter";
+        TypeFlags[TypeFlags["Class"] = 1024] = "Class";
+        TypeFlags[TypeFlags["Interface"] = 2048] = "Interface";
+        TypeFlags[TypeFlags["Reference"] = 4096] = "Reference";
+        TypeFlags[TypeFlags["Tuple"] = 8192] = "Tuple";
+        TypeFlags[TypeFlags["Union"] = 16384] = "Union";
+        TypeFlags[TypeFlags["Intersection"] = 32768] = "Intersection";
+        TypeFlags[TypeFlags["Anonymous"] = 65536] = "Anonymous";
+        TypeFlags[TypeFlags["Instantiated"] = 131072] = "Instantiated";
+        /* @internal */
+        TypeFlags[TypeFlags["FromSignature"] = 262144] = "FromSignature";
+        TypeFlags[TypeFlags["ObjectLiteral"] = 524288] = "ObjectLiteral";
+        /* @internal */
+        TypeFlags[TypeFlags["FreshObjectLiteral"] = 1048576] = "FreshObjectLiteral";
+        /* @internal */
+        TypeFlags[TypeFlags["ContainsWideningType"] = 2097152] = "ContainsWideningType";
+        /* @internal */
+        TypeFlags[TypeFlags["ContainsObjectLiteral"] = 4194304] = "ContainsObjectLiteral";
+        /* @internal */
+        TypeFlags[TypeFlags["ContainsAnyFunctionType"] = 8388608] = "ContainsAnyFunctionType";
+        TypeFlags[TypeFlags["ESSymbol"] = 16777216] = "ESSymbol";
+        TypeFlags[TypeFlags["ThisType"] = 33554432] = "ThisType";
+        TypeFlags[TypeFlags["ObjectLiteralPatternWithComputedProperties"] = 67108864] = "ObjectLiteralPatternWithComputedProperties";
+        TypeFlags[TypeFlags["Never"] = 134217728] = "Never";
+        /* @internal */
+        TypeFlags[TypeFlags["Nullable"] = 96] = "Nullable";
+        TypeFlags[TypeFlags["Falsy"] = 126] = "Falsy";
+        /* @internal */
+        TypeFlags[TypeFlags["Intrinsic"] = 150995071] = "Intrinsic";
+        /* @internal */
+        TypeFlags[TypeFlags["Primitive"] = 16777726] = "Primitive";
+        TypeFlags[TypeFlags["StringLike"] = 258] = "StringLike";
+        TypeFlags[TypeFlags["NumberLike"] = 132] = "NumberLike";
+        TypeFlags[TypeFlags["ObjectType"] = 80896] = "ObjectType";
+        TypeFlags[TypeFlags["UnionOrIntersection"] = 49152] = "UnionOrIntersection";
+        TypeFlags[TypeFlags["StructuredType"] = 130048] = "StructuredType";
+        // 'Narrowable' types are types where narrowing actually narrows.
+        // This *should* be every type other than null, undefined, void, and never
+        TypeFlags[TypeFlags["Narrowable"] = 16908175] = "Narrowable";
+        /* @internal */
+        TypeFlags[TypeFlags["RequiresWidening"] = 6291456] = "RequiresWidening";
+        /* @internal */
+        TypeFlags[TypeFlags["PropagatingFlags"] = 14680064] = "PropagatingFlags";
+    })(ts.TypeFlags || (ts.TypeFlags = {}));
+    var TypeFlags = ts.TypeFlags;
+    (function (SignatureKind) {
+        SignatureKind[SignatureKind["Call"] = 0] = "Call";
+        SignatureKind[SignatureKind["Construct"] = 1] = "Construct";
+    })(ts.SignatureKind || (ts.SignatureKind = {}));
+    var SignatureKind = ts.SignatureKind;
+    (function (IndexKind) {
+        IndexKind[IndexKind["String"] = 0] = "String";
+        IndexKind[IndexKind["Number"] = 1] = "Number";
+    })(ts.IndexKind || (ts.IndexKind = {}));
+    var IndexKind = ts.IndexKind;
+    /* @internal */
+    (function (SpecialPropertyAssignmentKind) {
+        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["None"] = 0] = "None";
+        /// exports.name = expr
+        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ExportsProperty"] = 1] = "ExportsProperty";
+        /// module.exports = expr
+        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ModuleExports"] = 2] = "ModuleExports";
+        /// className.prototype.name = expr
+        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["PrototypeProperty"] = 3] = "PrototypeProperty";
+        /// this.name = expr
+        SpecialPropertyAssignmentKind[SpecialPropertyAssignmentKind["ThisProperty"] = 4] = "ThisProperty";
+    })(ts.SpecialPropertyAssignmentKind || (ts.SpecialPropertyAssignmentKind = {}));
+    var SpecialPropertyAssignmentKind = ts.SpecialPropertyAssignmentKind;
+    (function (DiagnosticCategory) {
+        DiagnosticCategory[DiagnosticCategory["Warning"] = 0] = "Warning";
+        DiagnosticCategory[DiagnosticCategory["Error"] = 1] = "Error";
+        DiagnosticCategory[DiagnosticCategory["Message"] = 2] = "Message";
+    })(ts.DiagnosticCategory || (ts.DiagnosticCategory = {}));
+    var DiagnosticCategory = ts.DiagnosticCategory;
+    (function (ModuleResolutionKind) {
+        ModuleResolutionKind[ModuleResolutionKind["Classic"] = 1] = "Classic";
+        ModuleResolutionKind[ModuleResolutionKind["NodeJs"] = 2] = "NodeJs";
+    })(ts.ModuleResolutionKind || (ts.ModuleResolutionKind = {}));
+    var ModuleResolutionKind = ts.ModuleResolutionKind;
+    (function (ModuleKind) {
+        ModuleKind[ModuleKind["None"] = 0] = "None";
+        ModuleKind[ModuleKind["CommonJS"] = 1] = "CommonJS";
+        ModuleKind[ModuleKind["AMD"] = 2] = "AMD";
+        ModuleKind[ModuleKind["UMD"] = 3] = "UMD";
+        ModuleKind[ModuleKind["System"] = 4] = "System";
+        ModuleKind[ModuleKind["ES6"] = 5] = "ES6";
+        ModuleKind[ModuleKind["ES2015"] = 5] = "ES2015";
+    })(ts.ModuleKind || (ts.ModuleKind = {}));
+    var ModuleKind = ts.ModuleKind;
+    (function (JsxEmit) {
+        JsxEmit[JsxEmit["None"] = 0] = "None";
+        JsxEmit[JsxEmit["Preserve"] = 1] = "Preserve";
+        JsxEmit[JsxEmit["React"] = 2] = "React";
+    })(ts.JsxEmit || (ts.JsxEmit = {}));
+    var JsxEmit = ts.JsxEmit;
+    (function (NewLineKind) {
+        NewLineKind[NewLineKind["CarriageReturnLineFeed"] = 0] = "CarriageReturnLineFeed";
+        NewLineKind[NewLineKind["LineFeed"] = 1] = "LineFeed";
+    })(ts.NewLineKind || (ts.NewLineKind = {}));
+    var NewLineKind = ts.NewLineKind;
+    (function (ScriptKind) {
+        ScriptKind[ScriptKind["Unknown"] = 0] = "Unknown";
+        ScriptKind[ScriptKind["JS"] = 1] = "JS";
+        ScriptKind[ScriptKind["JSX"] = 2] = "JSX";
+        ScriptKind[ScriptKind["TS"] = 3] = "TS";
+        ScriptKind[ScriptKind["TSX"] = 4] = "TSX";
+    })(ts.ScriptKind || (ts.ScriptKind = {}));
+    var ScriptKind = ts.ScriptKind;
+    (function (ScriptTarget) {
+        ScriptTarget[ScriptTarget["ES3"] = 0] = "ES3";
+        ScriptTarget[ScriptTarget["ES5"] = 1] = "ES5";
+        ScriptTarget[ScriptTarget["ES6"] = 2] = "ES6";
+        ScriptTarget[ScriptTarget["ES2015"] = 2] = "ES2015";
+        ScriptTarget[ScriptTarget["Latest"] = 2] = "Latest";
+    })(ts.ScriptTarget || (ts.ScriptTarget = {}));
+    var ScriptTarget = ts.ScriptTarget;
+    (function (LanguageVariant) {
+        LanguageVariant[LanguageVariant["Standard"] = 0] = "Standard";
+        LanguageVariant[LanguageVariant["JSX"] = 1] = "JSX";
+    })(ts.LanguageVariant || (ts.LanguageVariant = {}));
+    var LanguageVariant = ts.LanguageVariant;
+    /* @internal */
+    (function (DiagnosticStyle) {
+        DiagnosticStyle[DiagnosticStyle["Simple"] = 0] = "Simple";
+        DiagnosticStyle[DiagnosticStyle["Pretty"] = 1] = "Pretty";
+    })(ts.DiagnosticStyle || (ts.DiagnosticStyle = {}));
+    var DiagnosticStyle = ts.DiagnosticStyle;
+    /* @internal */
+    (function (CharacterCodes) {
+        CharacterCodes[CharacterCodes["nullCharacter"] = 0] = "nullCharacter";
+        CharacterCodes[CharacterCodes["maxAsciiCharacter"] = 127] = "maxAsciiCharacter";
+        CharacterCodes[CharacterCodes["lineFeed"] = 10] = "lineFeed";
+        CharacterCodes[CharacterCodes["carriageReturn"] = 13] = "carriageReturn";
+        CharacterCodes[CharacterCodes["lineSeparator"] = 8232] = "lineSeparator";
+        CharacterCodes[CharacterCodes["paragraphSeparator"] = 8233] = "paragraphSeparator";
+        CharacterCodes[CharacterCodes["nextLine"] = 133] = "nextLine";
+        // Unicode 3.0 space characters
+        CharacterCodes[CharacterCodes["space"] = 32] = "space";
+        CharacterCodes[CharacterCodes["nonBreakingSpace"] = 160] = "nonBreakingSpace";
+        CharacterCodes[CharacterCodes["enQuad"] = 8192] = "enQuad";
+        CharacterCodes[CharacterCodes["emQuad"] = 8193] = "emQuad";
+        CharacterCodes[CharacterCodes["enSpace"] = 8194] = "enSpace";
+        CharacterCodes[CharacterCodes["emSpace"] = 8195] = "emSpace";
+        CharacterCodes[CharacterCodes["threePerEmSpace"] = 8196] = "threePerEmSpace";
+        CharacterCodes[CharacterCodes["fourPerEmSpace"] = 8197] = "fourPerEmSpace";
+        CharacterCodes[CharacterCodes["sixPerEmSpace"] = 8198] = "sixPerEmSpace";
+        CharacterCodes[CharacterCodes["figureSpace"] = 8199] = "figureSpace";
+        CharacterCodes[CharacterCodes["punctuationSpace"] = 8200] = "punctuationSpace";
+        CharacterCodes[CharacterCodes["thinSpace"] = 8201] = "thinSpace";
+        CharacterCodes[CharacterCodes["hairSpace"] = 8202] = "hairSpace";
+        CharacterCodes[CharacterCodes["zeroWidthSpace"] = 8203] = "zeroWidthSpace";
+        CharacterCodes[CharacterCodes["narrowNoBreakSpace"] = 8239] = "narrowNoBreakSpace";
+        CharacterCodes[CharacterCodes["ideographicSpace"] = 12288] = "ideographicSpace";
+        CharacterCodes[CharacterCodes["mathematicalSpace"] = 8287] = "mathematicalSpace";
+        CharacterCodes[CharacterCodes["ogham"] = 5760] = "ogham";
+        CharacterCodes[CharacterCodes["_"] = 95] = "_";
+        CharacterCodes[CharacterCodes["$"] = 36] = "$";
+        CharacterCodes[CharacterCodes["_0"] = 48] = "_0";
+        CharacterCodes[CharacterCodes["_1"] = 49] = "_1";
+        CharacterCodes[CharacterCodes["_2"] = 50] = "_2";
+        CharacterCodes[CharacterCodes["_3"] = 51] = "_3";
+        CharacterCodes[CharacterCodes["_4"] = 52] = "_4";
+        CharacterCodes[CharacterCodes["_5"] = 53] = "_5";
+        CharacterCodes[CharacterCodes["_6"] = 54] = "_6";
+        CharacterCodes[CharacterCodes["_7"] = 55] = "_7";
+        CharacterCodes[CharacterCodes["_8"] = 56] = "_8";
+        CharacterCodes[CharacterCodes["_9"] = 57] = "_9";
+        CharacterCodes[CharacterCodes["a"] = 97] = "a";
+        CharacterCodes[CharacterCodes["b"] = 98] = "b";
+        CharacterCodes[CharacterCodes["c"] = 99] = "c";
+        CharacterCodes[CharacterCodes["d"] = 100] = "d";
+        CharacterCodes[CharacterCodes["e"] = 101] = "e";
+        CharacterCodes[CharacterCodes["f"] = 102] = "f";
+        CharacterCodes[CharacterCodes["g"] = 103] = "g";
+        CharacterCodes[CharacterCodes["h"] = 104] = "h";
+        CharacterCodes[CharacterCodes["i"] = 105] = "i";
+        CharacterCodes[CharacterCodes["j"] = 106] = "j";
+        CharacterCodes[CharacterCodes["k"] = 107] = "k";
+        CharacterCodes[CharacterCodes["l"] = 108] = "l";
+        CharacterCodes[CharacterCodes["m"] = 109] = "m";
+        CharacterCodes[CharacterCodes["n"] = 110] = "n";
+        CharacterCodes[CharacterCodes["o"] = 111] = "o";
+        CharacterCodes[CharacterCodes["p"] = 112] = "p";
+        CharacterCodes[CharacterCodes["q"] = 113] = "q";
+        CharacterCodes[CharacterCodes["r"] = 114] = "r";
+        CharacterCodes[CharacterCodes["s"] = 115] = "s";
+        CharacterCodes[CharacterCodes["t"] = 116] = "t";
+        CharacterCodes[CharacterCodes["u"] = 117] = "u";
+        CharacterCodes[CharacterCodes["v"] = 118] = "v";
+        CharacterCodes[CharacterCodes["w"] = 119] = "w";
+        CharacterCodes[CharacterCodes["x"] = 120] = "x";
+        CharacterCodes[CharacterCodes["y"] = 121] = "y";
+        CharacterCodes[CharacterCodes["z"] = 122] = "z";
+        CharacterCodes[CharacterCodes["A"] = 65] = "A";
+        CharacterCodes[CharacterCodes["B"] = 66] = "B";
+        CharacterCodes[CharacterCodes["C"] = 67] = "C";
+        CharacterCodes[CharacterCodes["D"] = 68] = "D";
+        CharacterCodes[CharacterCodes["E"] = 69] = "E";
+        CharacterCodes[CharacterCodes["F"] = 70] = "F";
+        CharacterCodes[CharacterCodes["G"] = 71] = "G";
+        CharacterCodes[CharacterCodes["H"] = 72] = "H";
+        CharacterCodes[CharacterCodes["I"] = 73] = "I";
+        CharacterCodes[CharacterCodes["J"] = 74] = "J";
+        CharacterCodes[CharacterCodes["K"] = 75] = "K";
+        CharacterCodes[CharacterCodes["L"] = 76] = "L";
+        CharacterCodes[CharacterCodes["M"] = 77] = "M";
+        CharacterCodes[CharacterCodes["N"] = 78] = "N";
+        CharacterCodes[CharacterCodes["O"] = 79] = "O";
+        CharacterCodes[CharacterCodes["P"] = 80] = "P";
+        CharacterCodes[CharacterCodes["Q"] = 81] = "Q";
+        CharacterCodes[CharacterCodes["R"] = 82] = "R";
+        CharacterCodes[CharacterCodes["S"] = 83] = "S";
+        CharacterCodes[CharacterCodes["T"] = 84] = "T";
+        CharacterCodes[CharacterCodes["U"] = 85] = "U";
+        CharacterCodes[CharacterCodes["V"] = 86] = "V";
+        CharacterCodes[CharacterCodes["W"] = 87] = "W";
+        CharacterCodes[CharacterCodes["X"] = 88] = "X";
+        CharacterCodes[CharacterCodes["Y"] = 89] = "Y";
+        CharacterCodes[CharacterCodes["Z"] = 90] = "Z";
+        CharacterCodes[CharacterCodes["ampersand"] = 38] = "ampersand";
+        CharacterCodes[CharacterCodes["asterisk"] = 42] = "asterisk";
+        CharacterCodes[CharacterCodes["at"] = 64] = "at";
+        CharacterCodes[CharacterCodes["backslash"] = 92] = "backslash";
+        CharacterCodes[CharacterCodes["backtick"] = 96] = "backtick";
+        CharacterCodes[CharacterCodes["bar"] = 124] = "bar";
+        CharacterCodes[CharacterCodes["caret"] = 94] = "caret";
+        CharacterCodes[CharacterCodes["closeBrace"] = 125] = "closeBrace";
+        CharacterCodes[CharacterCodes["closeBracket"] = 93] = "closeBracket";
+        CharacterCodes[CharacterCodes["closeParen"] = 41] = "closeParen";
+        CharacterCodes[CharacterCodes["colon"] = 58] = "colon";
+        CharacterCodes[CharacterCodes["comma"] = 44] = "comma";
+        CharacterCodes[CharacterCodes["dot"] = 46] = "dot";
+        CharacterCodes[CharacterCodes["doubleQuote"] = 34] = "doubleQuote";
+        CharacterCodes[CharacterCodes["equals"] = 61] = "equals";
+        CharacterCodes[CharacterCodes["exclamation"] = 33] = "exclamation";
+        CharacterCodes[CharacterCodes["greaterThan"] = 62] = "greaterThan";
+        CharacterCodes[CharacterCodes["hash"] = 35] = "hash";
+        CharacterCodes[CharacterCodes["lessThan"] = 60] = "lessThan";
+        CharacterCodes[CharacterCodes["minus"] = 45] = "minus";
+        CharacterCodes[CharacterCodes["openBrace"] = 123] = "openBrace";
+        CharacterCodes[CharacterCodes["openBracket"] = 91] = "openBracket";
+        CharacterCodes[CharacterCodes["openParen"] = 40] = "openParen";
+        CharacterCodes[CharacterCodes["percent"] = 37] = "percent";
+        CharacterCodes[CharacterCodes["plus"] = 43] = "plus";
+        CharacterCodes[CharacterCodes["question"] = 63] = "question";
+        CharacterCodes[CharacterCodes["semicolon"] = 59] = "semicolon";
+        CharacterCodes[CharacterCodes["singleQuote"] = 39] = "singleQuote";
+        CharacterCodes[CharacterCodes["slash"] = 47] = "slash";
+        CharacterCodes[CharacterCodes["tilde"] = 126] = "tilde";
+        CharacterCodes[CharacterCodes["backspace"] = 8] = "backspace";
+        CharacterCodes[CharacterCodes["formFeed"] = 12] = "formFeed";
+        CharacterCodes[CharacterCodes["byteOrderMark"] = 65279] = "byteOrderMark";
+        CharacterCodes[CharacterCodes["tab"] = 9] = "tab";
+        CharacterCodes[CharacterCodes["verticalTab"] = 11] = "verticalTab";
+    })(ts.CharacterCodes || (ts.CharacterCodes = {}));
+    var CharacterCodes = ts.CharacterCodes;
+})(ts || (ts = {}));
+/// <reference path="types.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    /**
+     * Ternary values are defined such that
+     * x & y is False if either x or y is False.
+     * x & y is Maybe if either x or y is Maybe, but neither x or y is False.
+     * x & y is True if both x and y are True.
+     * x | y is False if both x and y are False.
+     * x | y is Maybe if either x or y is Maybe, but neither x or y is True.
+     * x | y is True if either x or y is True.
+     */
+    (function (Ternary) {
+        Ternary[Ternary["False"] = 0] = "False";
+        Ternary[Ternary["Maybe"] = 1] = "Maybe";
+        Ternary[Ternary["True"] = -1] = "True";
+    })(ts.Ternary || (ts.Ternary = {}));
+    var Ternary = ts.Ternary;
+    function createFileMap(keyMapper) {
+        var files = {};
+        return {
+            get: get,
+            set: set,
+            contains: contains,
+            remove: remove,
+            forEachValue: forEachValueInMap,
+            clear: clear
+        };
+        function forEachValueInMap(f) {
+            for (var key in files) {
+                f(key, files[key]);
+            }
+        }
+        // path should already be well-formed so it does not need to be normalized
+        function get(path) {
+            return files[toKey(path)];
+        }
+        function set(path, value) {
+            files[toKey(path)] = value;
+        }
+        function contains(path) {
+            return hasProperty(files, toKey(path));
+        }
+        function remove(path) {
+            var key = toKey(path);
+            delete files[key];
+        }
+        function clear() {
+            files = {};
+        }
+        function toKey(path) {
+            return keyMapper ? keyMapper(path) : path;
+        }
+    }
+    ts.createFileMap = createFileMap;
+    function toPath(fileName, basePath, getCanonicalFileName) {
+        var nonCanonicalizedPath = isRootedDiskPath(fileName)
+            ? normalizePath(fileName)
+            : getNormalizedAbsolutePath(fileName, basePath);
+        return getCanonicalFileName(nonCanonicalizedPath);
+    }
+    ts.toPath = toPath;
+    (function (Comparison) {
+        Comparison[Comparison["LessThan"] = -1] = "LessThan";
+        Comparison[Comparison["EqualTo"] = 0] = "EqualTo";
+        Comparison[Comparison["GreaterThan"] = 1] = "GreaterThan";
+    })(ts.Comparison || (ts.Comparison = {}));
+    var Comparison = ts.Comparison;
+    /**
+     * Iterates through 'array' by index and performs the callback on each element of array until the callback
+     * returns a truthy value, then returns that value.
+     * If no such value is found, the callback is applied to each element of array and undefined is returned.
+     */
+    function forEach(array, callback) {
+        if (array) {
+            for (var i = 0, len = array.length; i < len; i++) {
+                var result = callback(array[i], i);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.forEach = forEach;
+    function contains(array, value, areEqual) {
+        if (array) {
+            for (var _i = 0, array_1 = array; _i < array_1.length; _i++) {
+                var v = array_1[_i];
+                if (areEqual ? areEqual(v, value) : v === value) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+    ts.contains = contains;
+    function indexOf(array, value) {
+        if (array) {
+            for (var i = 0, len = array.length; i < len; i++) {
+                if (array[i] === value) {
+                    return i;
+                }
+            }
+        }
+        return -1;
+    }
+    ts.indexOf = indexOf;
+    function countWhere(array, predicate) {
+        var count = 0;
+        if (array) {
+            for (var _i = 0, array_2 = array; _i < array_2.length; _i++) {
+                var v = array_2[_i];
+                if (predicate(v)) {
+                    count++;
+                }
+            }
+        }
+        return count;
+    }
+    ts.countWhere = countWhere;
+    function filter(array, f) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_3 = array; _i < array_3.length; _i++) {
+                var item = array_3[_i];
+                if (f(item)) {
+                    result.push(item);
+                }
+            }
+        }
+        return result;
+    }
+    ts.filter = filter;
+    function map(array, f) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_4 = array; _i < array_4.length; _i++) {
+                var v = array_4[_i];
+                result.push(f(v));
+            }
+        }
+        return result;
+    }
+    ts.map = map;
+    function concatenate(array1, array2) {
+        if (!array2 || !array2.length)
+            return array1;
+        if (!array1 || !array1.length)
+            return array2;
+        return array1.concat(array2);
+    }
+    ts.concatenate = concatenate;
+    function deduplicate(array, areEqual) {
+        var result;
+        if (array) {
+            result = [];
+            for (var _i = 0, array_5 = array; _i < array_5.length; _i++) {
+                var item = array_5[_i];
+                if (!contains(result, item, areEqual)) {
+                    result.push(item);
+                }
+            }
+        }
+        return result;
+    }
+    ts.deduplicate = deduplicate;
+    function sum(array, prop) {
+        var result = 0;
+        for (var _i = 0, array_6 = array; _i < array_6.length; _i++) {
+            var v = array_6[_i];
+            result += v[prop];
+        }
+        return result;
+    }
+    ts.sum = sum;
+    function addRange(to, from) {
+        if (to && from) {
+            for (var _i = 0, from_1 = from; _i < from_1.length; _i++) {
+                var v = from_1[_i];
+                to.push(v);
+            }
+        }
+    }
+    ts.addRange = addRange;
+    function rangeEquals(array1, array2, pos, end) {
+        while (pos < end) {
+            if (array1[pos] !== array2[pos]) {
+                return false;
+            }
+            pos++;
+        }
+        return true;
+    }
+    ts.rangeEquals = rangeEquals;
+    /**
+     * Returns the last element of an array if non-empty, undefined otherwise.
+     */
+    function lastOrUndefined(array) {
+        if (array.length === 0) {
+            return undefined;
+        }
+        return array[array.length - 1];
+    }
+    ts.lastOrUndefined = lastOrUndefined;
+    /**
+     * Performs a binary search, finding the index at which 'value' occurs in 'array'.
+     * If no such index is found, returns the 2's-complement of first index at which
+     * number[index] exceeds number.
+     * @param array A sorted array whose first element must be no larger than number
+     * @param number The value to be searched for in the array.
+     */
+    function binarySearch(array, value) {
+        var low = 0;
+        var high = array.length - 1;
+        while (low <= high) {
+            var middle = low + ((high - low) >> 1);
+            var midValue = array[middle];
+            if (midValue === value) {
+                return middle;
+            }
+            else if (midValue > value) {
+                high = middle - 1;
+            }
+            else {
+                low = middle + 1;
+            }
+        }
+        return ~low;
+    }
+    ts.binarySearch = binarySearch;
+    function reduceLeft(array, f, initial) {
+        if (array) {
+            var count = array.length;
+            if (count > 0) {
+                var pos = 0;
+                var result = void 0;
+                if (arguments.length <= 2) {
+                    result = array[pos];
+                    pos++;
+                }
+                else {
+                    result = initial;
+                }
+                while (pos < count) {
+                    result = f(result, array[pos]);
+                    pos++;
+                }
+                return result;
+            }
+        }
+        return initial;
+    }
+    ts.reduceLeft = reduceLeft;
+    function reduceRight(array, f, initial) {
+        if (array) {
+            var pos = array.length - 1;
+            if (pos >= 0) {
+                var result = void 0;
+                if (arguments.length <= 2) {
+                    result = array[pos];
+                    pos--;
+                }
+                else {
+                    result = initial;
+                }
+                while (pos >= 0) {
+                    result = f(result, array[pos]);
+                    pos--;
+                }
+                return result;
+            }
+        }
+        return initial;
+    }
+    ts.reduceRight = reduceRight;
+    var hasOwnProperty = Object.prototype.hasOwnProperty;
+    function hasProperty(map, key) {
+        return hasOwnProperty.call(map, key);
+    }
+    ts.hasProperty = hasProperty;
+    function getKeys(map) {
+        var keys = [];
+        for (var key in map) {
+            keys.push(key);
+        }
+        return keys;
+    }
+    ts.getKeys = getKeys;
+    function getProperty(map, key) {
+        return hasOwnProperty.call(map, key) ? map[key] : undefined;
+    }
+    ts.getProperty = getProperty;
+    function isEmpty(map) {
+        for (var id in map) {
+            if (hasProperty(map, id)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.isEmpty = isEmpty;
+    function clone(object) {
+        var result = {};
+        for (var id in object) {
+            result[id] = object[id];
+        }
+        return result;
+    }
+    ts.clone = clone;
+    function extend(first, second) {
+        var result = {};
+        for (var id in first) {
+            result[id] = first[id];
+        }
+        for (var id in second) {
+            if (!hasProperty(result, id)) {
+                result[id] = second[id];
+            }
+        }
+        return result;
+    }
+    ts.extend = extend;
+    function forEachValue(map, callback) {
+        var result;
+        for (var id in map) {
+            if (result = callback(map[id]))
+                break;
+        }
+        return result;
+    }
+    ts.forEachValue = forEachValue;
+    function forEachKey(map, callback) {
+        var result;
+        for (var id in map) {
+            if (result = callback(id))
+                break;
+        }
+        return result;
+    }
+    ts.forEachKey = forEachKey;
+    function lookUp(map, key) {
+        return hasProperty(map, key) ? map[key] : undefined;
+    }
+    ts.lookUp = lookUp;
+    function copyMap(source, target) {
+        for (var p in source) {
+            target[p] = source[p];
+        }
+    }
+    ts.copyMap = copyMap;
+    /**
+     * Creates a map from the elements of an array.
+     *
+     * @param array the array of input elements.
+     * @param makeKey a function that produces a key for a given element.
+     *
+     * This function makes no effort to avoid collisions; if any two elements produce
+     * the same key with the given 'makeKey' function, then the element with the higher
+     * index in the array will be the one associated with the produced key.
+     */
+    function arrayToMap(array, makeKey) {
+        var result = {};
+        forEach(array, function (value) {
+            result[makeKey(value)] = value;
+        });
+        return result;
+    }
+    ts.arrayToMap = arrayToMap;
+    /**
+     * Reduce the properties of a map.
+     *
+     * @param map The map to reduce
+     * @param callback An aggregation function that is called for each entry in the map
+     * @param initial The initial value for the reduction.
+     */
+    function reduceProperties(map, callback, initial) {
+        var result = initial;
+        if (map) {
+            for (var key in map) {
+                if (hasProperty(map, key)) {
+                    result = callback(result, map[key], String(key));
+                }
+            }
+        }
+        return result;
+    }
+    ts.reduceProperties = reduceProperties;
+    /**
+     * Tests whether a value is an array.
+     */
+    function isArray(value) {
+        return Array.isArray ? Array.isArray(value) : value instanceof Array;
+    }
+    ts.isArray = isArray;
+    function memoize(callback) {
+        var value;
+        return function () {
+            if (callback) {
+                value = callback();
+                callback = undefined;
+            }
+            return value;
+        };
+    }
+    ts.memoize = memoize;
+    function formatStringFromArgs(text, args, baseIndex) {
+        baseIndex = baseIndex || 0;
+        return text.replace(/{(\d+)}/g, function (match, index) { return args[+index + baseIndex]; });
+    }
+    ts.localizedDiagnosticMessages = undefined;
+    function getLocaleSpecificMessage(message) {
+        return ts.localizedDiagnosticMessages && ts.localizedDiagnosticMessages[message.key]
+            ? ts.localizedDiagnosticMessages[message.key]
+            : message.message;
+    }
+    ts.getLocaleSpecificMessage = getLocaleSpecificMessage;
+    function createFileDiagnostic(file, start, length, message) {
+        var end = start + length;
+        Debug.assert(start >= 0, "start must be non-negative, is " + start);
+        Debug.assert(length >= 0, "length must be non-negative, is " + length);
+        if (file) {
+            Debug.assert(start <= file.text.length, "start must be within the bounds of the file. " + start + " > " + file.text.length);
+            Debug.assert(end <= file.text.length, "end must be the bounds of the file. " + end + " > " + file.text.length);
+        }
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 4) {
+            text = formatStringFromArgs(text, arguments, 4);
+        }
+        return {
+            file: file,
+            start: start,
+            length: length,
+            messageText: text,
+            category: message.category,
+            code: message.code
+        };
+    }
+    ts.createFileDiagnostic = createFileDiagnostic;
+    /* internal */
+    function formatMessage(dummy, message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 2) {
+            text = formatStringFromArgs(text, arguments, 2);
+        }
+        return text;
+    }
+    ts.formatMessage = formatMessage;
+    function createCompilerDiagnostic(message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 1) {
+            text = formatStringFromArgs(text, arguments, 1);
+        }
+        return {
+            file: undefined,
+            start: undefined,
+            length: undefined,
+            messageText: text,
+            category: message.category,
+            code: message.code
+        };
+    }
+    ts.createCompilerDiagnostic = createCompilerDiagnostic;
+    function chainDiagnosticMessages(details, message) {
+        var text = getLocaleSpecificMessage(message);
+        if (arguments.length > 2) {
+            text = formatStringFromArgs(text, arguments, 2);
+        }
+        return {
+            messageText: text,
+            category: message.category,
+            code: message.code,
+            next: details
+        };
+    }
+    ts.chainDiagnosticMessages = chainDiagnosticMessages;
+    function concatenateDiagnosticMessageChains(headChain, tailChain) {
+        var lastChain = headChain;
+        while (lastChain.next) {
+            lastChain = lastChain.next;
+        }
+        lastChain.next = tailChain;
+        return headChain;
+    }
+    ts.concatenateDiagnosticMessageChains = concatenateDiagnosticMessageChains;
+    function compareValues(a, b) {
+        if (a === b)
+            return 0 /* EqualTo */;
+        if (a === undefined)
+            return -1 /* LessThan */;
+        if (b === undefined)
+            return 1 /* GreaterThan */;
+        return a < b ? -1 /* LessThan */ : 1 /* GreaterThan */;
+    }
+    ts.compareValues = compareValues;
+    function getDiagnosticFileName(diagnostic) {
+        return diagnostic.file ? diagnostic.file.fileName : undefined;
+    }
+    function compareDiagnostics(d1, d2) {
+        return compareValues(getDiagnosticFileName(d1), getDiagnosticFileName(d2)) ||
+            compareValues(d1.start, d2.start) ||
+            compareValues(d1.length, d2.length) ||
+            compareValues(d1.code, d2.code) ||
+            compareMessageText(d1.messageText, d2.messageText) ||
+            0 /* EqualTo */;
+    }
+    ts.compareDiagnostics = compareDiagnostics;
+    function compareMessageText(text1, text2) {
+        while (text1 && text2) {
+            // We still have both chains.
+            var string1 = typeof text1 === "string" ? text1 : text1.messageText;
+            var string2 = typeof text2 === "string" ? text2 : text2.messageText;
+            var res = compareValues(string1, string2);
+            if (res) {
+                return res;
+            }
+            text1 = typeof text1 === "string" ? undefined : text1.next;
+            text2 = typeof text2 === "string" ? undefined : text2.next;
+        }
+        if (!text1 && !text2) {
+            // if the chains are done, then these messages are the same.
+            return 0 /* EqualTo */;
+        }
+        // We still have one chain remaining.  The shorter chain should come first.
+        return text1 ? 1 /* GreaterThan */ : -1 /* LessThan */;
+    }
+    function sortAndDeduplicateDiagnostics(diagnostics) {
+        return deduplicateSortedDiagnostics(diagnostics.sort(compareDiagnostics));
+    }
+    ts.sortAndDeduplicateDiagnostics = sortAndDeduplicateDiagnostics;
+    function deduplicateSortedDiagnostics(diagnostics) {
+        if (diagnostics.length < 2) {
+            return diagnostics;
+        }
+        var newDiagnostics = [diagnostics[0]];
+        var previousDiagnostic = diagnostics[0];
+        for (var i = 1; i < diagnostics.length; i++) {
+            var currentDiagnostic = diagnostics[i];
+            var isDupe = compareDiagnostics(currentDiagnostic, previousDiagnostic) === 0 /* EqualTo */;
+            if (!isDupe) {
+                newDiagnostics.push(currentDiagnostic);
+                previousDiagnostic = currentDiagnostic;
+            }
+        }
+        return newDiagnostics;
+    }
+    ts.deduplicateSortedDiagnostics = deduplicateSortedDiagnostics;
+    function normalizeSlashes(path) {
+        return path.replace(/\\/g, "/");
+    }
+    ts.normalizeSlashes = normalizeSlashes;
+    // Returns length of path root (i.e. length of "/", "x:/", "//server/share/, file:///user/files")
+    function getRootLength(path) {
+        if (path.charCodeAt(0) === 47 /* slash */) {
+            if (path.charCodeAt(1) !== 47 /* slash */)
+                return 1;
+            var p1 = path.indexOf("/", 2);
+            if (p1 < 0)
+                return 2;
+            var p2 = path.indexOf("/", p1 + 1);
+            if (p2 < 0)
+                return p1 + 1;
+            return p2 + 1;
+        }
+        if (path.charCodeAt(1) === 58 /* colon */) {
+            if (path.charCodeAt(2) === 47 /* slash */)
+                return 3;
+            return 2;
+        }
+        // Per RFC 1738 'file' URI schema has the shape file://<host>/<path>
+        // if <host> is omitted then it is assumed that host value is 'localhost',
+        // however slash after the omitted <host> is not removed.
+        // file:///folder1/file1 - this is a correct URI
+        // file://folder2/file2 - this is an incorrect URI
+        if (path.lastIndexOf("file:///", 0) === 0) {
+            return "file:///".length;
+        }
+        var idx = path.indexOf("://");
+        if (idx !== -1) {
+            return idx + "://".length;
+        }
+        return 0;
+    }
+    ts.getRootLength = getRootLength;
+    ts.directorySeparator = "/";
+    function getNormalizedParts(normalizedSlashedPath, rootLength) {
+        var parts = normalizedSlashedPath.substr(rootLength).split(ts.directorySeparator);
+        var normalized = [];
+        for (var _i = 0, parts_1 = parts; _i < parts_1.length; _i++) {
+            var part = parts_1[_i];
+            if (part !== ".") {
+                if (part === ".." && normalized.length > 0 && lastOrUndefined(normalized) !== "..") {
+                    normalized.pop();
+                }
+                else {
+                    // A part may be an empty string (which is 'falsy') if the path had consecutive slashes,
+                    // e.g. "path//file.ts".  Drop these before re-joining the parts.
+                    if (part) {
+                        normalized.push(part);
+                    }
+                }
+            }
+        }
+        return normalized;
+    }
+    function normalizePath(path) {
+        path = normalizeSlashes(path);
+        var rootLength = getRootLength(path);
+        var normalized = getNormalizedParts(path, rootLength);
+        return path.substr(0, rootLength) + normalized.join(ts.directorySeparator);
+    }
+    ts.normalizePath = normalizePath;
+    function getDirectoryPath(path) {
+        return path.substr(0, Math.max(getRootLength(path), path.lastIndexOf(ts.directorySeparator)));
+    }
+    ts.getDirectoryPath = getDirectoryPath;
+    function isUrl(path) {
+        return path && !isRootedDiskPath(path) && path.indexOf("://") !== -1;
+    }
+    ts.isUrl = isUrl;
+    function isRootedDiskPath(path) {
+        return getRootLength(path) !== 0;
+    }
+    ts.isRootedDiskPath = isRootedDiskPath;
+    function normalizedPathComponents(path, rootLength) {
+        var normalizedParts = getNormalizedParts(path, rootLength);
+        return [path.substr(0, rootLength)].concat(normalizedParts);
+    }
+    function getNormalizedPathComponents(path, currentDirectory) {
+        path = normalizeSlashes(path);
+        var rootLength = getRootLength(path);
+        if (rootLength === 0) {
+            // If the path is not rooted it is relative to current directory
+            path = combinePaths(normalizeSlashes(currentDirectory), path);
+            rootLength = getRootLength(path);
+        }
+        return normalizedPathComponents(path, rootLength);
+    }
+    ts.getNormalizedPathComponents = getNormalizedPathComponents;
+    function getNormalizedAbsolutePath(fileName, currentDirectory) {
+        return getNormalizedPathFromPathComponents(getNormalizedPathComponents(fileName, currentDirectory));
+    }
+    ts.getNormalizedAbsolutePath = getNormalizedAbsolutePath;
+    function getNormalizedPathFromPathComponents(pathComponents) {
+        if (pathComponents && pathComponents.length) {
+            return pathComponents[0] + pathComponents.slice(1).join(ts.directorySeparator);
+        }
+    }
+    ts.getNormalizedPathFromPathComponents = getNormalizedPathFromPathComponents;
+    function getNormalizedPathComponentsOfUrl(url) {
+        // Get root length of http://www.website.com/folder1/folder2/
+        // In this example the root is:  http://www.website.com/
+        // normalized path components should be ["http://www.website.com/", "folder1", "folder2"]
+        var urlLength = url.length;
+        // Initial root length is http:// part
+        var rootLength = url.indexOf("://") + "://".length;
+        while (rootLength < urlLength) {
+            // Consume all immediate slashes in the protocol
+            // eg.initial rootlength is just file:// but it needs to consume another "/" in file:///
+            if (url.charCodeAt(rootLength) === 47 /* slash */) {
+                rootLength++;
+            }
+            else {
+                // non slash character means we continue proceeding to next component of root search
+                break;
+            }
+        }
+        // there are no parts after http:// just return current string as the pathComponent
+        if (rootLength === urlLength) {
+            return [url];
+        }
+        // Find the index of "/" after website.com so the root can be http://www.website.com/ (from existing http://)
+        var indexOfNextSlash = url.indexOf(ts.directorySeparator, rootLength);
+        if (indexOfNextSlash !== -1) {
+            // Found the "/" after the website.com so the root is length of http://www.website.com/
+            // and get components after the root normally like any other folder components
+            rootLength = indexOfNextSlash + 1;
+            return normalizedPathComponents(url, rootLength);
+        }
+        else {
+            // Can't find the host assume the rest of the string as component
+            // but make sure we append "/"  to it as root is not joined using "/"
+            // eg. if url passed in was http://website.com we want to use root as [http://website.com/]
+            // so that other path manipulations will be correct and it can be merged with relative paths correctly
+            return [url + ts.directorySeparator];
+        }
+    }
+    function getNormalizedPathOrUrlComponents(pathOrUrl, currentDirectory) {
+        if (isUrl(pathOrUrl)) {
+            return getNormalizedPathComponentsOfUrl(pathOrUrl);
+        }
+        else {
+            return getNormalizedPathComponents(pathOrUrl, currentDirectory);
+        }
+    }
+    function getRelativePathToDirectoryOrUrl(directoryPathOrUrl, relativeOrAbsolutePath, currentDirectory, getCanonicalFileName, isAbsolutePathAnUrl) {
+        var pathComponents = getNormalizedPathOrUrlComponents(relativeOrAbsolutePath, currentDirectory);
+        var directoryComponents = getNormalizedPathOrUrlComponents(directoryPathOrUrl, currentDirectory);
+        if (directoryComponents.length > 1 && lastOrUndefined(directoryComponents) === "") {
+            // If the directory path given was of type test/cases/ then we really need components of directory to be only till its name
+            // that is  ["test", "cases", ""] needs to be actually ["test", "cases"]
+            directoryComponents.length--;
+        }
+        // Find the component that differs
+        var joinStartIndex;
+        for (joinStartIndex = 0; joinStartIndex < pathComponents.length && joinStartIndex < directoryComponents.length; joinStartIndex++) {
+            if (getCanonicalFileName(directoryComponents[joinStartIndex]) !== getCanonicalFileName(pathComponents[joinStartIndex])) {
+                break;
+            }
+        }
+        // Get the relative path
+        if (joinStartIndex) {
+            var relativePath = "";
+            var relativePathComponents = pathComponents.slice(joinStartIndex, pathComponents.length);
+            for (; joinStartIndex < directoryComponents.length; joinStartIndex++) {
+                if (directoryComponents[joinStartIndex] !== "") {
+                    relativePath = relativePath + ".." + ts.directorySeparator;
+                }
+            }
+            return relativePath + relativePathComponents.join(ts.directorySeparator);
+        }
+        // Cant find the relative path, get the absolute path
+        var absolutePath = getNormalizedPathFromPathComponents(pathComponents);
+        if (isAbsolutePathAnUrl && isRootedDiskPath(absolutePath)) {
+            absolutePath = "file:///" + absolutePath;
+        }
+        return absolutePath;
+    }
+    ts.getRelativePathToDirectoryOrUrl = getRelativePathToDirectoryOrUrl;
+    function getBaseFileName(path) {
+        if (path === undefined) {
+            return undefined;
+        }
+        var i = path.lastIndexOf(ts.directorySeparator);
+        return i < 0 ? path : path.substring(i + 1);
+    }
+    ts.getBaseFileName = getBaseFileName;
+    function combinePaths(path1, path2) {
+        if (!(path1 && path1.length))
+            return path2;
+        if (!(path2 && path2.length))
+            return path1;
+        if (getRootLength(path2) !== 0)
+            return path2;
+        if (path1.charAt(path1.length - 1) === ts.directorySeparator)
+            return path1 + path2;
+        return path1 + ts.directorySeparator + path2;
+    }
+    ts.combinePaths = combinePaths;
+    function fileExtensionIs(path, extension) {
+        var pathLen = path.length;
+        var extLen = extension.length;
+        return pathLen > extLen && path.substr(pathLen - extLen, extLen) === extension;
+    }
+    ts.fileExtensionIs = fileExtensionIs;
+    function ensureScriptKind(fileName, scriptKind) {
+        // Using scriptKind as a condition handles both:
+        // - 'scriptKind' is unspecified and thus it is `undefined`
+        // - 'scriptKind' is set and it is `Unknown` (0)
+        // If the 'scriptKind' is 'undefined' or 'Unknown' then we attempt
+        // to get the ScriptKind from the file name. If it cannot be resolved
+        // from the file name then the default 'TS' script kind is returned.
+        return (scriptKind || getScriptKindFromFileName(fileName)) || 3 /* TS */;
+    }
+    ts.ensureScriptKind = ensureScriptKind;
+    function getScriptKindFromFileName(fileName) {
+        var ext = fileName.substr(fileName.lastIndexOf("."));
+        switch (ext.toLowerCase()) {
+            case ".js":
+                return 1 /* JS */;
+            case ".jsx":
+                return 2 /* JSX */;
+            case ".ts":
+                return 3 /* TS */;
+            case ".tsx":
+                return 4 /* TSX */;
+            default:
+                return 0 /* Unknown */;
+        }
+    }
+    ts.getScriptKindFromFileName = getScriptKindFromFileName;
+    /**
+     *  List of supported extensions in order of file resolution precedence.
+     */
+    ts.supportedTypeScriptExtensions = [".ts", ".tsx", ".d.ts"];
+    ts.supportedJavascriptExtensions = [".js", ".jsx"];
+    var allSupportedExtensions = ts.supportedTypeScriptExtensions.concat(ts.supportedJavascriptExtensions);
+    function getSupportedExtensions(options) {
+        return options && options.allowJs ? allSupportedExtensions : ts.supportedTypeScriptExtensions;
+    }
+    ts.getSupportedExtensions = getSupportedExtensions;
+    function isSupportedSourceFileName(fileName, compilerOptions) {
+        if (!fileName) {
+            return false;
+        }
+        for (var _i = 0, _a = getSupportedExtensions(compilerOptions); _i < _a.length; _i++) {
+            var extension = _a[_i];
+            if (fileExtensionIs(fileName, extension)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.isSupportedSourceFileName = isSupportedSourceFileName;
+    var extensionsToRemove = [".d.ts", ".ts", ".js", ".tsx", ".jsx"];
+    function removeFileExtension(path) {
+        for (var _i = 0, extensionsToRemove_1 = extensionsToRemove; _i < extensionsToRemove_1.length; _i++) {
+            var ext = extensionsToRemove_1[_i];
+            var extensionless = tryRemoveExtension(path, ext);
+            if (extensionless !== undefined) {
+                return extensionless;
+            }
+        }
+        return path;
+    }
+    ts.removeFileExtension = removeFileExtension;
+    function tryRemoveExtension(path, extension) {
+        return fileExtensionIs(path, extension) ? path.substring(0, path.length - extension.length) : undefined;
+    }
+    ts.tryRemoveExtension = tryRemoveExtension;
+    function isJsxOrTsxExtension(ext) {
+        return ext === ".jsx" || ext === ".tsx";
+    }
+    ts.isJsxOrTsxExtension = isJsxOrTsxExtension;
+    function Symbol(flags, name) {
+        this.flags = flags;
+        this.name = name;
+        this.declarations = undefined;
+    }
+    function Type(checker, flags) {
+        this.flags = flags;
+    }
+    function Signature(checker) {
+    }
+    function Node(kind, pos, end) {
+        this.kind = kind;
+        this.pos = pos;
+        this.end = end;
+        this.flags = 0 /* None */;
+        this.parent = undefined;
+    }
+    ts.objectAllocator = {
+        getNodeConstructor: function () { return Node; },
+        getSourceFileConstructor: function () { return Node; },
+        getSymbolConstructor: function () { return Symbol; },
+        getTypeConstructor: function () { return Type; },
+        getSignatureConstructor: function () { return Signature; }
+    };
+    (function (AssertionLevel) {
+        AssertionLevel[AssertionLevel["None"] = 0] = "None";
+        AssertionLevel[AssertionLevel["Normal"] = 1] = "Normal";
+        AssertionLevel[AssertionLevel["Aggressive"] = 2] = "Aggressive";
+        AssertionLevel[AssertionLevel["VeryAggressive"] = 3] = "VeryAggressive";
+    })(ts.AssertionLevel || (ts.AssertionLevel = {}));
+    var AssertionLevel = ts.AssertionLevel;
+    var Debug;
+    (function (Debug) {
+        var currentAssertionLevel = 0 /* None */;
+        function shouldAssert(level) {
+            return currentAssertionLevel >= level;
+        }
+        Debug.shouldAssert = shouldAssert;
+        function assert(expression, message, verboseDebugInfo) {
+            if (!expression) {
+                var verboseDebugString = "";
+                if (verboseDebugInfo) {
+                    verboseDebugString = "\r\nVerbose Debug Information: " + verboseDebugInfo();
+                }
+                debugger;
+                throw new Error("Debug Failure. False expression: " + (message || "") + verboseDebugString);
+            }
+        }
+        Debug.assert = assert;
+        function fail(message) {
+            Debug.assert(/*expression*/ false, message);
+        }
+        Debug.fail = fail;
+    })(Debug = ts.Debug || (ts.Debug = {}));
+    function copyListRemovingItem(item, list) {
+        var copiedList = [];
+        for (var _i = 0, list_1 = list; _i < list_1.length; _i++) {
+            var e = list_1[_i];
+            if (e !== item) {
+                copiedList.push(e);
+            }
+        }
+        return copiedList;
+    }
+    ts.copyListRemovingItem = copyListRemovingItem;
+    function createGetCanonicalFileName(useCaseSensitivefileNames) {
+        return useCaseSensitivefileNames
+            ? (function (fileName) { return fileName; })
+            : (function (fileName) { return fileName.toLowerCase(); });
+    }
+    ts.createGetCanonicalFileName = createGetCanonicalFileName;
+})(ts || (ts = {}));
+/// <reference path="core.ts"/>
+var ts;
+(function (ts) {
+    ts.sys = (function () {
+        function getWScriptSystem() {
+            var fso = new ActiveXObject("Scripting.FileSystemObject");
+            var fileStream = new ActiveXObject("ADODB.Stream");
+            fileStream.Type = 2 /*text*/;
+            var binaryStream = new ActiveXObject("ADODB.Stream");
+            binaryStream.Type = 1 /*binary*/;
+            var args = [];
+            for (var i = 0; i < WScript.Arguments.length; i++) {
+                args[i] = WScript.Arguments.Item(i);
+            }
+            function readFile(fileName, encoding) {
+                if (!fso.FileExists(fileName)) {
+                    return undefined;
+                }
+                fileStream.Open();
+                try {
+                    if (encoding) {
+                        fileStream.Charset = encoding;
+                        fileStream.LoadFromFile(fileName);
+                    }
+                    else {
+                        // Load file and read the first two bytes into a string with no interpretation
+                        fileStream.Charset = "x-ansi";
+                        fileStream.LoadFromFile(fileName);
+                        var bom = fileStream.ReadText(2) || "";
+                        // Position must be at 0 before encoding can be changed
+                        fileStream.Position = 0;
+                        // [0xFF,0xFE] and [0xFE,0xFF] mean utf-16 (little or big endian), otherwise default to utf-8
+                        fileStream.Charset = bom.length >= 2 && (bom.charCodeAt(0) === 0xFF && bom.charCodeAt(1) === 0xFE || bom.charCodeAt(0) === 0xFE && bom.charCodeAt(1) === 0xFF) ? "unicode" : "utf-8";
+                    }
+                    // ReadText method always strips byte order mark from resulting string
+                    return fileStream.ReadText();
+                }
+                catch (e) {
+                    throw e;
+                }
+                finally {
+                    fileStream.Close();
+                }
+            }
+            function writeFile(fileName, data, writeByteOrderMark) {
+                fileStream.Open();
+                binaryStream.Open();
+                try {
+                    // Write characters in UTF-8 encoding
+                    fileStream.Charset = "utf-8";
+                    fileStream.WriteText(data);
+                    // If we don't want the BOM, then skip it by setting the starting location to 3 (size of BOM).
+                    // If not, start from position 0, as the BOM will be added automatically when charset==utf8.
+                    if (writeByteOrderMark) {
+                        fileStream.Position = 0;
+                    }
+                    else {
+                        fileStream.Position = 3;
+                    }
+                    fileStream.CopyTo(binaryStream);
+                    binaryStream.SaveToFile(fileName, 2 /*overwrite*/);
+                }
+                finally {
+                    binaryStream.Close();
+                    fileStream.Close();
+                }
+            }
+            function getCanonicalPath(path) {
+                return path.toLowerCase();
+            }
+            function getNames(collection) {
+                var result = [];
+                for (var e = new Enumerator(collection); !e.atEnd(); e.moveNext()) {
+                    result.push(e.item().Name);
+                }
+                return result.sort();
+            }
+            function getDirectories(path) {
+                var folder = fso.GetFolder(path);
+                return getNames(folder.subfolders);
+            }
+            function readDirectory(path, extension, exclude) {
+                var result = [];
+                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
+                visitDirectory(path);
+                return result;
+                function visitDirectory(path) {
+                    var folder = fso.GetFolder(path || ".");
+                    var files = getNames(folder.files);
+                    for (var _i = 0, files_1 = files; _i < files_1.length; _i++) {
+                        var current = files_1[_i];
+                        var name_1 = ts.combinePaths(path, current);
+                        if ((!extension || ts.fileExtensionIs(name_1, extension)) && !ts.contains(exclude, getCanonicalPath(name_1))) {
+                            result.push(name_1);
+                        }
+                    }
+                    var subfolders = getNames(folder.subfolders);
+                    for (var _a = 0, subfolders_1 = subfolders; _a < subfolders_1.length; _a++) {
+                        var current = subfolders_1[_a];
+                        var name_2 = ts.combinePaths(path, current);
+                        if (!ts.contains(exclude, getCanonicalPath(name_2))) {
+                            visitDirectory(name_2);
+                        }
+                    }
+                }
+            }
+            return {
+                args: args,
+                newLine: "\r\n",
+                useCaseSensitiveFileNames: false,
+                write: function (s) {
+                    WScript.StdOut.Write(s);
+                },
+                readFile: readFile,
+                writeFile: writeFile,
+                resolvePath: function (path) {
+                    return fso.GetAbsolutePathName(path);
+                },
+                fileExists: function (path) {
+                    return fso.FileExists(path);
+                },
+                directoryExists: function (path) {
+                    return fso.FolderExists(path);
+                },
+                createDirectory: function (directoryName) {
+                    if (!this.directoryExists(directoryName)) {
+                        fso.CreateFolder(directoryName);
+                    }
+                },
+                getExecutingFilePath: function () {
+                    return WScript.ScriptFullName;
+                },
+                getCurrentDirectory: function () {
+                    return new ActiveXObject("WScript.Shell").CurrentDirectory;
+                },
+                getDirectories: getDirectories,
+                readDirectory: readDirectory,
+                exit: function (exitCode) {
+                    try {
+                        WScript.Quit(exitCode);
+                    }
+                    catch (e) {
+                    }
+                }
+            };
+        }
+        function getNodeSystem() {
+            var _fs = require("fs");
+            var _path = require("path");
+            var _os = require("os");
+            var _crypto = require("crypto");
+            var useNonPollingWatchers = process.env["TSC_NONPOLLING_WATCHER"];
+            function createWatchedFileSet() {
+                var dirWatchers = {};
+                // One file can have multiple watchers
+                var fileWatcherCallbacks = {};
+                return { addFile: addFile, removeFile: removeFile };
+                function reduceDirWatcherRefCountForFile(fileName) {
+                    var dirName = ts.getDirectoryPath(fileName);
+                    if (ts.hasProperty(dirWatchers, dirName)) {
+                        var watcher = dirWatchers[dirName];
+                        watcher.referenceCount -= 1;
+                        if (watcher.referenceCount <= 0) {
+                            watcher.close();
+                            delete dirWatchers[dirName];
+                        }
+                    }
+                }
+                function addDirWatcher(dirPath) {
+                    if (ts.hasProperty(dirWatchers, dirPath)) {
+                        var watcher_1 = dirWatchers[dirPath];
+                        watcher_1.referenceCount += 1;
+                        return;
+                    }
+                    var watcher = _fs.watch(dirPath, { persistent: true }, function (eventName, relativeFileName) { return fileEventHandler(eventName, relativeFileName, dirPath); });
+                    watcher.referenceCount = 1;
+                    dirWatchers[dirPath] = watcher;
+                    return;
+                }
+                function addFileWatcherCallback(filePath, callback) {
+                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
+                        fileWatcherCallbacks[filePath].push(callback);
+                    }
+                    else {
+                        fileWatcherCallbacks[filePath] = [callback];
+                    }
+                }
+                function addFile(fileName, callback) {
+                    addFileWatcherCallback(fileName, callback);
+                    addDirWatcher(ts.getDirectoryPath(fileName));
+                    return { fileName: fileName, callback: callback };
+                }
+                function removeFile(watchedFile) {
+                    removeFileWatcherCallback(watchedFile.fileName, watchedFile.callback);
+                    reduceDirWatcherRefCountForFile(watchedFile.fileName);
+                }
+                function removeFileWatcherCallback(filePath, callback) {
+                    if (ts.hasProperty(fileWatcherCallbacks, filePath)) {
+                        var newCallbacks = ts.copyListRemovingItem(callback, fileWatcherCallbacks[filePath]);
+                        if (newCallbacks.length === 0) {
+                            delete fileWatcherCallbacks[filePath];
+                        }
+                        else {
+                            fileWatcherCallbacks[filePath] = newCallbacks;
+                        }
+                    }
+                }
+                function fileEventHandler(eventName, relativeFileName, baseDirPath) {
+                    // When files are deleted from disk, the triggered "rename" event would have a relativefileName of "undefined"
+                    var fileName = typeof relativeFileName !== "string"
+                        ? undefined
+                        : ts.getNormalizedAbsolutePath(relativeFileName, baseDirPath);
+                    // Some applications save a working file via rename operations
+                    if ((eventName === "change" || eventName === "rename") && ts.hasProperty(fileWatcherCallbacks, fileName)) {
+                        for (var _i = 0, _a = fileWatcherCallbacks[fileName]; _i < _a.length; _i++) {
+                            var fileCallback = _a[_i];
+                            fileCallback(fileName);
+                        }
+                    }
+                }
+            }
+            var watchedFileSet = createWatchedFileSet();
+            function isNode4OrLater() {
+                return parseInt(process.version.charAt(1)) >= 4;
+            }
+            var platform = _os.platform();
+            // win32\win64 are case insensitive platforms, MacOS (darwin) by default is also case insensitive
+            var useCaseSensitiveFileNames = platform !== "win32" && platform !== "win64" && platform !== "darwin";
+            function readFile(fileName, encoding) {
+                if (!fileExists(fileName)) {
+                    return undefined;
+                }
+                var buffer = _fs.readFileSync(fileName);
+                var len = buffer.length;
+                if (len >= 2 && buffer[0] === 0xFE && buffer[1] === 0xFF) {
+                    // Big endian UTF-16 byte order mark detected. Since big endian is not supported by node.js,
+                    // flip all byte pairs and treat as little endian.
+                    len &= ~1;
+                    for (var i = 0; i < len; i += 2) {
+                        var temp = buffer[i];
+                        buffer[i] = buffer[i + 1];
+                        buffer[i + 1] = temp;
+                    }
+                    return buffer.toString("utf16le", 2);
+                }
+                if (len >= 2 && buffer[0] === 0xFF && buffer[1] === 0xFE) {
+                    // Little endian UTF-16 byte order mark detected
+                    return buffer.toString("utf16le", 2);
+                }
+                if (len >= 3 && buffer[0] === 0xEF && buffer[1] === 0xBB && buffer[2] === 0xBF) {
+                    // UTF-8 byte order mark detected
+                    return buffer.toString("utf8", 3);
+                }
+                // Default is UTF-8 with no byte order mark
+                return buffer.toString("utf8");
+            }
+            function writeFile(fileName, data, writeByteOrderMark) {
+                // If a BOM is required, emit one
+                if (writeByteOrderMark) {
+                    data = "\uFEFF" + data;
+                }
+                var fd;
+                try {
+                    fd = _fs.openSync(fileName, "w");
+                    _fs.writeSync(fd, data, undefined, "utf8");
+                }
+                finally {
+                    if (fd !== undefined) {
+                        _fs.closeSync(fd);
+                    }
+                }
+            }
+            function getCanonicalPath(path) {
+                return useCaseSensitiveFileNames ? path : path.toLowerCase();
+            }
+            var FileSystemEntryKind;
+            (function (FileSystemEntryKind) {
+                FileSystemEntryKind[FileSystemEntryKind["File"] = 0] = "File";
+                FileSystemEntryKind[FileSystemEntryKind["Directory"] = 1] = "Directory";
+            })(FileSystemEntryKind || (FileSystemEntryKind = {}));
+            function fileSystemEntryExists(path, entryKind) {
+                try {
+                    var stat = _fs.statSync(path);
+                    switch (entryKind) {
+                        case 0 /* File */: return stat.isFile();
+                        case 1 /* Directory */: return stat.isDirectory();
+                    }
+                }
+                catch (e) {
+                    return false;
+                }
+            }
+            function fileExists(path) {
+                return fileSystemEntryExists(path, 0 /* File */);
+            }
+            function directoryExists(path) {
+                return fileSystemEntryExists(path, 1 /* Directory */);
+            }
+            function getDirectories(path) {
+                return ts.filter(_fs.readdirSync(path), function (p) { return fileSystemEntryExists(ts.combinePaths(path, p), 1 /* Directory */); });
+            }
+            function readDirectory(path, extension, exclude) {
+                var result = [];
+                exclude = ts.map(exclude, function (s) { return getCanonicalPath(ts.combinePaths(path, s)); });
+                visitDirectory(path);
+                return result;
+                function visitDirectory(path) {
+                    var files = _fs.readdirSync(path || ".").sort();
+                    var directories = [];
+                    for (var _i = 0, files_2 = files; _i < files_2.length; _i++) {
+                        var current = files_2[_i];
+                        // This is necessary because on some file system node fails to exclude
+                        // "." and "..". See https://github.com/nodejs/node/issues/4002
+                        if (current === "." || current === "..") {
+                            continue;
+                        }
+                        var name_3 = ts.combinePaths(path, current);
+                        if (!ts.contains(exclude, getCanonicalPath(name_3))) {
+                            var stat = _fs.statSync(name_3);
+                            if (stat.isFile()) {
+                                if (!extension || ts.fileExtensionIs(name_3, extension)) {
+                                    result.push(name_3);
+                                }
+                            }
+                            else if (stat.isDirectory()) {
+                                directories.push(name_3);
+                            }
+                        }
+                    }
+                    for (var _a = 0, directories_1 = directories; _a < directories_1.length; _a++) {
+                        var current = directories_1[_a];
+                        visitDirectory(current);
+                    }
+                }
+            }
+            return {
+                args: process.argv.slice(2),
+                newLine: _os.EOL,
+                useCaseSensitiveFileNames: useCaseSensitiveFileNames,
+                write: function (s) {
+                    process.stdout.write(s);
+                },
+                readFile: readFile,
+                writeFile: writeFile,
+                watchFile: function (fileName, callback) {
+                    if (useNonPollingWatchers) {
+                        var watchedFile_1 = watchedFileSet.addFile(fileName, callback);
+                        return {
+                            close: function () { return watchedFileSet.removeFile(watchedFile_1); }
+                        };
+                    }
+                    else {
+                        _fs.watchFile(fileName, { persistent: true, interval: 250 }, fileChanged);
+                        return {
+                            close: function () { return _fs.unwatchFile(fileName, fileChanged); }
+                        };
+                    }
+                    function fileChanged(curr, prev) {
+                        if (+curr.mtime <= +prev.mtime) {
+                            return;
+                        }
+                        callback(fileName);
+                    }
+                },
+                watchDirectory: function (directoryName, callback, recursive) {
+                    // Node 4.0 `fs.watch` function supports the "recursive" option on both OSX and Windows
+                    // (ref: https://github.com/nodejs/node/pull/2649 and https://github.com/Microsoft/TypeScript/issues/4643)
+                    var options;
+                    if (isNode4OrLater() && (process.platform === "win32" || process.platform === "darwin")) {
+                        options = { persistent: true, recursive: !!recursive };
+                    }
+                    else {
+                        options = { persistent: true };
+                    }
+                    return _fs.watch(directoryName, options, function (eventName, relativeFileName) {
+                        // In watchDirectory we only care about adding and removing files (when event name is
+                        // "rename"); changes made within files are handled by corresponding fileWatchers (when
+                        // event name is "change")
+                        if (eventName === "rename") {
+                            // When deleting a file, the passed baseFileName is null
+                            callback(!relativeFileName ? relativeFileName : ts.normalizePath(ts.combinePaths(directoryName, relativeFileName)));
+                        }
+                        ;
+                    });
+                },
+                resolvePath: function (path) {
+                    return _path.resolve(path);
+                },
+                fileExists: fileExists,
+                directoryExists: directoryExists,
+                createDirectory: function (directoryName) {
+                    if (!this.directoryExists(directoryName)) {
+                        _fs.mkdirSync(directoryName);
+                    }
+                },
+                getExecutingFilePath: function () {
+                    return __filename;
+                },
+                getCurrentDirectory: function () {
+                    return process.cwd();
+                },
+                getDirectories: getDirectories,
+                readDirectory: readDirectory,
+                getModifiedTime: function (path) {
+                    try {
+                        return _fs.statSync(path).mtime;
+                    }
+                    catch (e) {
+                        return undefined;
+                    }
+                },
+                createHash: function (data) {
+                    var hash = _crypto.createHash("md5");
+                    hash.update(data);
+                    return hash.digest("hex");
+                },
+                getMemoryUsage: function () {
+                    if (global.gc) {
+                        global.gc();
+                    }
+                    return process.memoryUsage().heapUsed;
+                },
+                exit: function (exitCode) {
+                    process.exit(exitCode);
+                },
+                realpath: function (path) {
+                    return _fs.realpathSync(path);
+                }
+            };
+        }
+        function getChakraSystem() {
+            var realpath = ChakraHost.realpath && (function (path) { return ChakraHost.realpath(path); });
+            return {
+                newLine: ChakraHost.newLine || "\r\n",
+                args: ChakraHost.args,
+                useCaseSensitiveFileNames: !!ChakraHost.useCaseSensitiveFileNames,
+                write: ChakraHost.echo,
+                readFile: function (path, encoding) {
+                    // encoding is automatically handled by the implementation in ChakraHost
+                    return ChakraHost.readFile(path);
+                },
+                writeFile: function (path, data, writeByteOrderMark) {
+                    // If a BOM is required, emit one
+                    if (writeByteOrderMark) {
+                        data = "\uFEFF" + data;
+                    }
+                    ChakraHost.writeFile(path, data);
+                },
+                resolvePath: ChakraHost.resolvePath,
+                fileExists: ChakraHost.fileExists,
+                directoryExists: ChakraHost.directoryExists,
+                createDirectory: ChakraHost.createDirectory,
+                getExecutingFilePath: function () { return ChakraHost.executingFile; },
+                getCurrentDirectory: function () { return ChakraHost.currentDirectory; },
+                getDirectories: ChakraHost.getDirectories,
+                readDirectory: ChakraHost.readDirectory,
+                exit: ChakraHost.quit,
+                realpath: realpath
+            };
+        }
+        if (typeof ChakraHost !== "undefined") {
+            return getChakraSystem();
+        }
+        else if (typeof WScript !== "undefined" && typeof ActiveXObject === "function") {
+            return getWScriptSystem();
+        }
+        else if (typeof process !== "undefined" && process.nextTick && !process.browser && typeof require !== "undefined") {
+            // process and process.nextTick checks if current environment is node-like
+            // process.browser check excludes webpack and browserify
+            return getNodeSystem();
+        }
+        else {
+            return undefined; // Unsupported host
+        }
+    })();
+})(ts || (ts = {}));
+// <auto-generated />
+/// <reference path="types.ts" />
+/* @internal */
+var ts;
+(function (ts) {
+    ts.Diagnostics = {
+        Unterminated_string_literal: { code: 1002, category: ts.DiagnosticCategory.Error, key: "Unterminated_string_literal_1002", message: "Unterminated string literal." },
+        Identifier_expected: { code: 1003, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_1003", message: "Identifier expected." },
+        _0_expected: { code: 1005, category: ts.DiagnosticCategory.Error, key: "_0_expected_1005", message: "'{0}' expected." },
+        A_file_cannot_have_a_reference_to_itself: { code: 1006, category: ts.DiagnosticCategory.Error, key: "A_file_cannot_have_a_reference_to_itself_1006", message: "A file cannot have a reference to itself." },
+        Trailing_comma_not_allowed: { code: 1009, category: ts.DiagnosticCategory.Error, key: "Trailing_comma_not_allowed_1009", message: "Trailing comma not allowed." },
+        Asterisk_Slash_expected: { code: 1010, category: ts.DiagnosticCategory.Error, key: "Asterisk_Slash_expected_1010", message: "'*/' expected." },
+        Unexpected_token: { code: 1012, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_1012", message: "Unexpected token." },
+        A_rest_parameter_must_be_last_in_a_parameter_list: { code: 1014, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_last_in_a_parameter_list_1014", message: "A rest parameter must be last in a parameter list." },
+        Parameter_cannot_have_question_mark_and_initializer: { code: 1015, category: ts.DiagnosticCategory.Error, key: "Parameter_cannot_have_question_mark_and_initializer_1015", message: "Parameter cannot have question mark and initializer." },
+        A_required_parameter_cannot_follow_an_optional_parameter: { code: 1016, category: ts.DiagnosticCategory.Error, key: "A_required_parameter_cannot_follow_an_optional_parameter_1016", message: "A required parameter cannot follow an optional parameter." },
+        An_index_signature_cannot_have_a_rest_parameter: { code: 1017, category: ts.DiagnosticCategory.Error, key: "An_index_signature_cannot_have_a_rest_parameter_1017", message: "An index signature cannot have a rest parameter." },
+        An_index_signature_parameter_cannot_have_an_accessibility_modifier: { code: 1018, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_accessibility_modifier_1018", message: "An index signature parameter cannot have an accessibility modifier." },
+        An_index_signature_parameter_cannot_have_a_question_mark: { code: 1019, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_a_question_mark_1019", message: "An index signature parameter cannot have a question mark." },
+        An_index_signature_parameter_cannot_have_an_initializer: { code: 1020, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_cannot_have_an_initializer_1020", message: "An index signature parameter cannot have an initializer." },
+        An_index_signature_must_have_a_type_annotation: { code: 1021, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_a_type_annotation_1021", message: "An index signature must have a type annotation." },
+        An_index_signature_parameter_must_have_a_type_annotation: { code: 1022, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_must_have_a_type_annotation_1022", message: "An index signature parameter must have a type annotation." },
+        An_index_signature_parameter_type_must_be_string_or_number: { code: 1023, category: ts.DiagnosticCategory.Error, key: "An_index_signature_parameter_type_must_be_string_or_number_1023", message: "An index signature parameter type must be 'string' or 'number'." },
+        readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature: { code: 1024, category: ts.DiagnosticCategory.Error, key: "readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature_1024", message: "'readonly' modifier can only appear on a property declaration or index signature." },
+        Accessibility_modifier_already_seen: { code: 1028, category: ts.DiagnosticCategory.Error, key: "Accessibility_modifier_already_seen_1028", message: "Accessibility modifier already seen." },
+        _0_modifier_must_precede_1_modifier: { code: 1029, category: ts.DiagnosticCategory.Error, key: "_0_modifier_must_precede_1_modifier_1029", message: "'{0}' modifier must precede '{1}' modifier." },
+        _0_modifier_already_seen: { code: 1030, category: ts.DiagnosticCategory.Error, key: "_0_modifier_already_seen_1030", message: "'{0}' modifier already seen." },
+        _0_modifier_cannot_appear_on_a_class_element: { code: 1031, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_class_element_1031", message: "'{0}' modifier cannot appear on a class element." },
+        super_must_be_followed_by_an_argument_list_or_member_access: { code: 1034, category: ts.DiagnosticCategory.Error, key: "super_must_be_followed_by_an_argument_list_or_member_access_1034", message: "'super' must be followed by an argument list or member access." },
+        Only_ambient_modules_can_use_quoted_names: { code: 1035, category: ts.DiagnosticCategory.Error, key: "Only_ambient_modules_can_use_quoted_names_1035", message: "Only ambient modules can use quoted names." },
+        Statements_are_not_allowed_in_ambient_contexts: { code: 1036, category: ts.DiagnosticCategory.Error, key: "Statements_are_not_allowed_in_ambient_contexts_1036", message: "Statements are not allowed in ambient contexts." },
+        A_declare_modifier_cannot_be_used_in_an_already_ambient_context: { code: 1038, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_cannot_be_used_in_an_already_ambient_context_1038", message: "A 'declare' modifier cannot be used in an already ambient context." },
+        Initializers_are_not_allowed_in_ambient_contexts: { code: 1039, category: ts.DiagnosticCategory.Error, key: "Initializers_are_not_allowed_in_ambient_contexts_1039", message: "Initializers are not allowed in ambient contexts." },
+        _0_modifier_cannot_be_used_in_an_ambient_context: { code: 1040, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_in_an_ambient_context_1040", message: "'{0}' modifier cannot be used in an ambient context." },
+        _0_modifier_cannot_be_used_with_a_class_declaration: { code: 1041, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_a_class_declaration_1041", message: "'{0}' modifier cannot be used with a class declaration." },
+        _0_modifier_cannot_be_used_here: { code: 1042, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_here_1042", message: "'{0}' modifier cannot be used here." },
+        _0_modifier_cannot_appear_on_a_data_property: { code: 1043, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_data_property_1043", message: "'{0}' modifier cannot appear on a data property." },
+        _0_modifier_cannot_appear_on_a_module_or_namespace_element: { code: 1044, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_module_or_namespace_element_1044", message: "'{0}' modifier cannot appear on a module or namespace element." },
+        A_0_modifier_cannot_be_used_with_an_interface_declaration: { code: 1045, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_interface_declaration_1045", message: "A '{0}' modifier cannot be used with an interface declaration." },
+        A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file: { code: 1046, category: ts.DiagnosticCategory.Error, key: "A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file_1046", message: "A 'declare' modifier is required for a top level declaration in a .d.ts file." },
+        A_rest_parameter_cannot_be_optional: { code: 1047, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_be_optional_1047", message: "A rest parameter cannot be optional." },
+        A_rest_parameter_cannot_have_an_initializer: { code: 1048, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_cannot_have_an_initializer_1048", message: "A rest parameter cannot have an initializer." },
+        A_set_accessor_must_have_exactly_one_parameter: { code: 1049, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_must_have_exactly_one_parameter_1049", message: "A 'set' accessor must have exactly one parameter." },
+        A_set_accessor_cannot_have_an_optional_parameter: { code: 1051, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_an_optional_parameter_1051", message: "A 'set' accessor cannot have an optional parameter." },
+        A_set_accessor_parameter_cannot_have_an_initializer: { code: 1052, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_parameter_cannot_have_an_initializer_1052", message: "A 'set' accessor parameter cannot have an initializer." },
+        A_set_accessor_cannot_have_rest_parameter: { code: 1053, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_rest_parameter_1053", message: "A 'set' accessor cannot have rest parameter." },
+        A_get_accessor_cannot_have_parameters: { code: 1054, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_cannot_have_parameters_1054", message: "A 'get' accessor cannot have parameters." },
+        Type_0_is_not_a_valid_async_function_return_type: { code: 1055, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_valid_async_function_return_type_1055", message: "Type '{0}' is not a valid async function return type." },
+        Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher: { code: 1056, category: ts.DiagnosticCategory.Error, key: "Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher_1056", message: "Accessors are only available when targeting ECMAScript 5 and higher." },
+        An_async_function_or_method_must_have_a_valid_awaitable_return_type: { code: 1057, category: ts.DiagnosticCategory.Error, key: "An_async_function_or_method_must_have_a_valid_awaitable_return_type_1057", message: "An async function or method must have a valid awaitable return type." },
+        Operand_for_await_does_not_have_a_valid_callable_then_member: { code: 1058, category: ts.DiagnosticCategory.Error, key: "Operand_for_await_does_not_have_a_valid_callable_then_member_1058", message: "Operand for 'await' does not have a valid callable 'then' member." },
+        Return_expression_in_async_function_does_not_have_a_valid_callable_then_member: { code: 1059, category: ts.DiagnosticCategory.Error, key: "Return_expression_in_async_function_does_not_have_a_valid_callable_then_member_1059", message: "Return expression in async function does not have a valid callable 'then' member." },
+        Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member: { code: 1060, category: ts.DiagnosticCategory.Error, key: "Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member_1060", message: "Expression body for async arrow function does not have a valid callable 'then' member." },
+        Enum_member_must_have_initializer: { code: 1061, category: ts.DiagnosticCategory.Error, key: "Enum_member_must_have_initializer_1061", message: "Enum member must have initializer." },
+        _0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method: { code: 1062, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method_1062", message: "{0} is referenced directly or indirectly in the fulfillment callback of its own 'then' method." },
+        An_export_assignment_cannot_be_used_in_a_namespace: { code: 1063, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_namespace_1063", message: "An export assignment cannot be used in a namespace." },
+        The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type: { code: 1064, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type_1064", message: "The return type of an async function or method must be the global Promise<T> type." },
+        In_ambient_enum_declarations_member_initializer_must_be_constant_expression: { code: 1066, category: ts.DiagnosticCategory.Error, key: "In_ambient_enum_declarations_member_initializer_must_be_constant_expression_1066", message: "In ambient enum declarations member initializer must be constant expression." },
+        Unexpected_token_A_constructor_method_accessor_or_property_was_expected: { code: 1068, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_A_constructor_method_accessor_or_property_was_expected_1068", message: "Unexpected token. A constructor, method, accessor, or property was expected." },
+        _0_modifier_cannot_appear_on_a_type_member: { code: 1070, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_type_member_1070", message: "'{0}' modifier cannot appear on a type member." },
+        _0_modifier_cannot_appear_on_an_index_signature: { code: 1071, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_an_index_signature_1071", message: "'{0}' modifier cannot appear on an index signature." },
+        A_0_modifier_cannot_be_used_with_an_import_declaration: { code: 1079, category: ts.DiagnosticCategory.Error, key: "A_0_modifier_cannot_be_used_with_an_import_declaration_1079", message: "A '{0}' modifier cannot be used with an import declaration." },
+        Invalid_reference_directive_syntax: { code: 1084, category: ts.DiagnosticCategory.Error, key: "Invalid_reference_directive_syntax_1084", message: "Invalid 'reference' directive syntax." },
+        Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher: { code: 1085, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher_1085", message: "Octal literals are not available when targeting ECMAScript 5 and higher." },
+        An_accessor_cannot_be_declared_in_an_ambient_context: { code: 1086, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_be_declared_in_an_ambient_context_1086", message: "An accessor cannot be declared in an ambient context." },
+        _0_modifier_cannot_appear_on_a_constructor_declaration: { code: 1089, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_constructor_declaration_1089", message: "'{0}' modifier cannot appear on a constructor declaration." },
+        _0_modifier_cannot_appear_on_a_parameter: { code: 1090, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_appear_on_a_parameter_1090", message: "'{0}' modifier cannot appear on a parameter." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement: { code: 1091, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement_1091", message: "Only a single variable declaration is allowed in a 'for...in' statement." },
+        Type_parameters_cannot_appear_on_a_constructor_declaration: { code: 1092, category: ts.DiagnosticCategory.Error, key: "Type_parameters_cannot_appear_on_a_constructor_declaration_1092", message: "Type parameters cannot appear on a constructor declaration." },
+        Type_annotation_cannot_appear_on_a_constructor_declaration: { code: 1093, category: ts.DiagnosticCategory.Error, key: "Type_annotation_cannot_appear_on_a_constructor_declaration_1093", message: "Type annotation cannot appear on a constructor declaration." },
+        An_accessor_cannot_have_type_parameters: { code: 1094, category: ts.DiagnosticCategory.Error, key: "An_accessor_cannot_have_type_parameters_1094", message: "An accessor cannot have type parameters." },
+        A_set_accessor_cannot_have_a_return_type_annotation: { code: 1095, category: ts.DiagnosticCategory.Error, key: "A_set_accessor_cannot_have_a_return_type_annotation_1095", message: "A 'set' accessor cannot have a return type annotation." },
+        An_index_signature_must_have_exactly_one_parameter: { code: 1096, category: ts.DiagnosticCategory.Error, key: "An_index_signature_must_have_exactly_one_parameter_1096", message: "An index signature must have exactly one parameter." },
+        _0_list_cannot_be_empty: { code: 1097, category: ts.DiagnosticCategory.Error, key: "_0_list_cannot_be_empty_1097", message: "'{0}' list cannot be empty." },
+        Type_parameter_list_cannot_be_empty: { code: 1098, category: ts.DiagnosticCategory.Error, key: "Type_parameter_list_cannot_be_empty_1098", message: "Type parameter list cannot be empty." },
+        Type_argument_list_cannot_be_empty: { code: 1099, category: ts.DiagnosticCategory.Error, key: "Type_argument_list_cannot_be_empty_1099", message: "Type argument list cannot be empty." },
+        Invalid_use_of_0_in_strict_mode: { code: 1100, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_in_strict_mode_1100", message: "Invalid use of '{0}' in strict mode." },
+        with_statements_are_not_allowed_in_strict_mode: { code: 1101, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_strict_mode_1101", message: "'with' statements are not allowed in strict mode." },
+        delete_cannot_be_called_on_an_identifier_in_strict_mode: { code: 1102, category: ts.DiagnosticCategory.Error, key: "delete_cannot_be_called_on_an_identifier_in_strict_mode_1102", message: "'delete' cannot be called on an identifier in strict mode." },
+        A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement: { code: 1104, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement_1104", message: "A 'continue' statement can only be used within an enclosing iteration statement." },
+        A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement: { code: 1105, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement_1105", message: "A 'break' statement can only be used within an enclosing iteration or switch statement." },
+        Jump_target_cannot_cross_function_boundary: { code: 1107, category: ts.DiagnosticCategory.Error, key: "Jump_target_cannot_cross_function_boundary_1107", message: "Jump target cannot cross function boundary." },
+        A_return_statement_can_only_be_used_within_a_function_body: { code: 1108, category: ts.DiagnosticCategory.Error, key: "A_return_statement_can_only_be_used_within_a_function_body_1108", message: "A 'return' statement can only be used within a function body." },
+        Expression_expected: { code: 1109, category: ts.DiagnosticCategory.Error, key: "Expression_expected_1109", message: "Expression expected." },
+        Type_expected: { code: 1110, category: ts.DiagnosticCategory.Error, key: "Type_expected_1110", message: "Type expected." },
+        A_default_clause_cannot_appear_more_than_once_in_a_switch_statement: { code: 1113, category: ts.DiagnosticCategory.Error, key: "A_default_clause_cannot_appear_more_than_once_in_a_switch_statement_1113", message: "A 'default' clause cannot appear more than once in a 'switch' statement." },
+        Duplicate_label_0: { code: 1114, category: ts.DiagnosticCategory.Error, key: "Duplicate_label_0_1114", message: "Duplicate label '{0}'" },
+        A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement: { code: 1115, category: ts.DiagnosticCategory.Error, key: "A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement_1115", message: "A 'continue' statement can only jump to a label of an enclosing iteration statement." },
+        A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement: { code: 1116, category: ts.DiagnosticCategory.Error, key: "A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement_1116", message: "A 'break' statement can only jump to a label of an enclosing statement." },
+        An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode: { code: 1117, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode_1117", message: "An object literal cannot have multiple properties with the same name in strict mode." },
+        An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name: { code: 1118, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name_1118", message: "An object literal cannot have multiple get/set accessors with the same name." },
+        An_object_literal_cannot_have_property_and_accessor_with_the_same_name: { code: 1119, category: ts.DiagnosticCategory.Error, key: "An_object_literal_cannot_have_property_and_accessor_with_the_same_name_1119", message: "An object literal cannot have property and accessor with the same name." },
+        An_export_assignment_cannot_have_modifiers: { code: 1120, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_have_modifiers_1120", message: "An export assignment cannot have modifiers." },
+        Octal_literals_are_not_allowed_in_strict_mode: { code: 1121, category: ts.DiagnosticCategory.Error, key: "Octal_literals_are_not_allowed_in_strict_mode_1121", message: "Octal literals are not allowed in strict mode." },
+        A_tuple_type_element_list_cannot_be_empty: { code: 1122, category: ts.DiagnosticCategory.Error, key: "A_tuple_type_element_list_cannot_be_empty_1122", message: "A tuple type element list cannot be empty." },
+        Variable_declaration_list_cannot_be_empty: { code: 1123, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_list_cannot_be_empty_1123", message: "Variable declaration list cannot be empty." },
+        Digit_expected: { code: 1124, category: ts.DiagnosticCategory.Error, key: "Digit_expected_1124", message: "Digit expected." },
+        Hexadecimal_digit_expected: { code: 1125, category: ts.DiagnosticCategory.Error, key: "Hexadecimal_digit_expected_1125", message: "Hexadecimal digit expected." },
+        Unexpected_end_of_text: { code: 1126, category: ts.DiagnosticCategory.Error, key: "Unexpected_end_of_text_1126", message: "Unexpected end of text." },
+        Invalid_character: { code: 1127, category: ts.DiagnosticCategory.Error, key: "Invalid_character_1127", message: "Invalid character." },
+        Declaration_or_statement_expected: { code: 1128, category: ts.DiagnosticCategory.Error, key: "Declaration_or_statement_expected_1128", message: "Declaration or statement expected." },
+        Statement_expected: { code: 1129, category: ts.DiagnosticCategory.Error, key: "Statement_expected_1129", message: "Statement expected." },
+        case_or_default_expected: { code: 1130, category: ts.DiagnosticCategory.Error, key: "case_or_default_expected_1130", message: "'case' or 'default' expected." },
+        Property_or_signature_expected: { code: 1131, category: ts.DiagnosticCategory.Error, key: "Property_or_signature_expected_1131", message: "Property or signature expected." },
+        Enum_member_expected: { code: 1132, category: ts.DiagnosticCategory.Error, key: "Enum_member_expected_1132", message: "Enum member expected." },
+        Variable_declaration_expected: { code: 1134, category: ts.DiagnosticCategory.Error, key: "Variable_declaration_expected_1134", message: "Variable declaration expected." },
+        Argument_expression_expected: { code: 1135, category: ts.DiagnosticCategory.Error, key: "Argument_expression_expected_1135", message: "Argument expression expected." },
+        Property_assignment_expected: { code: 1136, category: ts.DiagnosticCategory.Error, key: "Property_assignment_expected_1136", message: "Property assignment expected." },
+        Expression_or_comma_expected: { code: 1137, category: ts.DiagnosticCategory.Error, key: "Expression_or_comma_expected_1137", message: "Expression or comma expected." },
+        Parameter_declaration_expected: { code: 1138, category: ts.DiagnosticCategory.Error, key: "Parameter_declaration_expected_1138", message: "Parameter declaration expected." },
+        Type_parameter_declaration_expected: { code: 1139, category: ts.DiagnosticCategory.Error, key: "Type_parameter_declaration_expected_1139", message: "Type parameter declaration expected." },
+        Type_argument_expected: { code: 1140, category: ts.DiagnosticCategory.Error, key: "Type_argument_expected_1140", message: "Type argument expected." },
+        String_literal_expected: { code: 1141, category: ts.DiagnosticCategory.Error, key: "String_literal_expected_1141", message: "String literal expected." },
+        Line_break_not_permitted_here: { code: 1142, category: ts.DiagnosticCategory.Error, key: "Line_break_not_permitted_here_1142", message: "Line break not permitted here." },
+        or_expected: { code: 1144, category: ts.DiagnosticCategory.Error, key: "or_expected_1144", message: "'{' or ';' expected." },
+        Declaration_expected: { code: 1146, category: ts.DiagnosticCategory.Error, key: "Declaration_expected_1146", message: "Declaration expected." },
+        Import_declarations_in_a_namespace_cannot_reference_a_module: { code: 1147, category: ts.DiagnosticCategory.Error, key: "Import_declarations_in_a_namespace_cannot_reference_a_module_1147", message: "Import declarations in a namespace cannot reference a module." },
+        Cannot_use_imports_exports_or_module_augmentations_when_module_is_none: { code: 1148, category: ts.DiagnosticCategory.Error, key: "Cannot_use_imports_exports_or_module_augmentations_when_module_is_none_1148", message: "Cannot use imports, exports, or module augmentations when '--module' is 'none'." },
+        File_name_0_differs_from_already_included_file_name_1_only_in_casing: { code: 1149, category: ts.DiagnosticCategory.Error, key: "File_name_0_differs_from_already_included_file_name_1_only_in_casing_1149", message: "File name '{0}' differs from already included file name '{1}' only in casing" },
+        new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead: { code: 1150, category: ts.DiagnosticCategory.Error, key: "new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead_1150", message: "'new T[]' cannot be used to create an array. Use 'new Array<T>()' instead." },
+        const_declarations_must_be_initialized: { code: 1155, category: ts.DiagnosticCategory.Error, key: "const_declarations_must_be_initialized_1155", message: "'const' declarations must be initialized" },
+        const_declarations_can_only_be_declared_inside_a_block: { code: 1156, category: ts.DiagnosticCategory.Error, key: "const_declarations_can_only_be_declared_inside_a_block_1156", message: "'const' declarations can only be declared inside a block." },
+        let_declarations_can_only_be_declared_inside_a_block: { code: 1157, category: ts.DiagnosticCategory.Error, key: "let_declarations_can_only_be_declared_inside_a_block_1157", message: "'let' declarations can only be declared inside a block." },
+        Unterminated_template_literal: { code: 1160, category: ts.DiagnosticCategory.Error, key: "Unterminated_template_literal_1160", message: "Unterminated template literal." },
+        Unterminated_regular_expression_literal: { code: 1161, category: ts.DiagnosticCategory.Error, key: "Unterminated_regular_expression_literal_1161", message: "Unterminated regular expression literal." },
+        An_object_member_cannot_be_declared_optional: { code: 1162, category: ts.DiagnosticCategory.Error, key: "An_object_member_cannot_be_declared_optional_1162", message: "An object member cannot be declared optional." },
+        A_yield_expression_is_only_allowed_in_a_generator_body: { code: 1163, category: ts.DiagnosticCategory.Error, key: "A_yield_expression_is_only_allowed_in_a_generator_body_1163", message: "A 'yield' expression is only allowed in a generator body." },
+        Computed_property_names_are_not_allowed_in_enums: { code: 1164, category: ts.DiagnosticCategory.Error, key: "Computed_property_names_are_not_allowed_in_enums_1164", message: "Computed property names are not allowed in enums." },
+        A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol: { code: 1165, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol_1165", message: "A computed property name in an ambient context must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol: { code: 1166, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol_1166", message: "A computed property name in a class property declaration must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol: { code: 1168, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol_1168", message: "A computed property name in a method overload must directly refer to a built-in symbol." },
+        A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol: { code: 1169, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol_1169", message: "A computed property name in an interface must directly refer to a built-in symbol." },
+        A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol: { code: 1170, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol_1170", message: "A computed property name in a type literal must directly refer to a built-in symbol." },
+        A_comma_expression_is_not_allowed_in_a_computed_property_name: { code: 1171, category: ts.DiagnosticCategory.Error, key: "A_comma_expression_is_not_allowed_in_a_computed_property_name_1171", message: "A comma expression is not allowed in a computed property name." },
+        extends_clause_already_seen: { code: 1172, category: ts.DiagnosticCategory.Error, key: "extends_clause_already_seen_1172", message: "'extends' clause already seen." },
+        extends_clause_must_precede_implements_clause: { code: 1173, category: ts.DiagnosticCategory.Error, key: "extends_clause_must_precede_implements_clause_1173", message: "'extends' clause must precede 'implements' clause." },
+        Classes_can_only_extend_a_single_class: { code: 1174, category: ts.DiagnosticCategory.Error, key: "Classes_can_only_extend_a_single_class_1174", message: "Classes can only extend a single class." },
+        implements_clause_already_seen: { code: 1175, category: ts.DiagnosticCategory.Error, key: "implements_clause_already_seen_1175", message: "'implements' clause already seen." },
+        Interface_declaration_cannot_have_implements_clause: { code: 1176, category: ts.DiagnosticCategory.Error, key: "Interface_declaration_cannot_have_implements_clause_1176", message: "Interface declaration cannot have 'implements' clause." },
+        Binary_digit_expected: { code: 1177, category: ts.DiagnosticCategory.Error, key: "Binary_digit_expected_1177", message: "Binary digit expected." },
+        Octal_digit_expected: { code: 1178, category: ts.DiagnosticCategory.Error, key: "Octal_digit_expected_1178", message: "Octal digit expected." },
+        Unexpected_token_expected: { code: 1179, category: ts.DiagnosticCategory.Error, key: "Unexpected_token_expected_1179", message: "Unexpected token. '{' expected." },
+        Property_destructuring_pattern_expected: { code: 1180, category: ts.DiagnosticCategory.Error, key: "Property_destructuring_pattern_expected_1180", message: "Property destructuring pattern expected." },
+        Array_element_destructuring_pattern_expected: { code: 1181, category: ts.DiagnosticCategory.Error, key: "Array_element_destructuring_pattern_expected_1181", message: "Array element destructuring pattern expected." },
+        A_destructuring_declaration_must_have_an_initializer: { code: 1182, category: ts.DiagnosticCategory.Error, key: "A_destructuring_declaration_must_have_an_initializer_1182", message: "A destructuring declaration must have an initializer." },
+        An_implementation_cannot_be_declared_in_ambient_contexts: { code: 1183, category: ts.DiagnosticCategory.Error, key: "An_implementation_cannot_be_declared_in_ambient_contexts_1183", message: "An implementation cannot be declared in ambient contexts." },
+        Modifiers_cannot_appear_here: { code: 1184, category: ts.DiagnosticCategory.Error, key: "Modifiers_cannot_appear_here_1184", message: "Modifiers cannot appear here." },
+        Merge_conflict_marker_encountered: { code: 1185, category: ts.DiagnosticCategory.Error, key: "Merge_conflict_marker_encountered_1185", message: "Merge conflict marker encountered." },
+        A_rest_element_cannot_have_an_initializer: { code: 1186, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_have_an_initializer_1186", message: "A rest element cannot have an initializer." },
+        A_parameter_property_may_not_be_a_binding_pattern: { code: 1187, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_may_not_be_a_binding_pattern_1187", message: "A parameter property may not be a binding pattern." },
+        Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement: { code: 1188, category: ts.DiagnosticCategory.Error, key: "Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement_1188", message: "Only a single variable declaration is allowed in a 'for...of' statement." },
+        The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer: { code: 1189, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer_1189", message: "The variable declaration of a 'for...in' statement cannot have an initializer." },
+        The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer: { code: 1190, category: ts.DiagnosticCategory.Error, key: "The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer_1190", message: "The variable declaration of a 'for...of' statement cannot have an initializer." },
+        An_import_declaration_cannot_have_modifiers: { code: 1191, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_cannot_have_modifiers_1191", message: "An import declaration cannot have modifiers." },
+        Module_0_has_no_default_export: { code: 1192, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_default_export_1192", message: "Module '{0}' has no default export." },
+        An_export_declaration_cannot_have_modifiers: { code: 1193, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_cannot_have_modifiers_1193", message: "An export declaration cannot have modifiers." },
+        Export_declarations_are_not_permitted_in_a_namespace: { code: 1194, category: ts.DiagnosticCategory.Error, key: "Export_declarations_are_not_permitted_in_a_namespace_1194", message: "Export declarations are not permitted in a namespace." },
+        Catch_clause_variable_name_must_be_an_identifier: { code: 1195, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_name_must_be_an_identifier_1195", message: "Catch clause variable name must be an identifier." },
+        Catch_clause_variable_cannot_have_a_type_annotation: { code: 1196, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_a_type_annotation_1196", message: "Catch clause variable cannot have a type annotation." },
+        Catch_clause_variable_cannot_have_an_initializer: { code: 1197, category: ts.DiagnosticCategory.Error, key: "Catch_clause_variable_cannot_have_an_initializer_1197", message: "Catch clause variable cannot have an initializer." },
+        An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive: { code: 1198, category: ts.DiagnosticCategory.Error, key: "An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive_1198", message: "An extended Unicode escape value must be between 0x0 and 0x10FFFF inclusive." },
+        Unterminated_Unicode_escape_sequence: { code: 1199, category: ts.DiagnosticCategory.Error, key: "Unterminated_Unicode_escape_sequence_1199", message: "Unterminated Unicode escape sequence." },
+        Line_terminator_not_permitted_before_arrow: { code: 1200, category: ts.DiagnosticCategory.Error, key: "Line_terminator_not_permitted_before_arrow_1200", message: "Line terminator not permitted before arrow." },
+        Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead: { code: 1202, category: ts.DiagnosticCategory.Error, key: "Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asteri_1202", message: "Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from \"mod\"', 'import {a} from \"mod\"', 'import d from \"mod\"', or another module format instead." },
+        Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead: { code: 1203, category: ts.DiagnosticCategory.Error, key: "Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_defaul_1203", message: "Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead." },
+        Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower: { code: 1204, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower_1204", message: "Cannot compile modules into 'es2015' when targeting 'ES5' or lower." },
+        Decorators_are_not_valid_here: { code: 1206, category: ts.DiagnosticCategory.Error, key: "Decorators_are_not_valid_here_1206", message: "Decorators are not valid here." },
+        Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name: { code: 1207, category: ts.DiagnosticCategory.Error, key: "Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name_1207", message: "Decorators cannot be applied to multiple get/set accessors of the same name." },
+        Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided: { code: 1208, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided_1208", message: "Cannot compile namespaces when the '--isolatedModules' flag is provided." },
+        Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided: { code: 1209, category: ts.DiagnosticCategory.Error, key: "Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided_1209", message: "Ambient const enums are not allowed when the '--isolatedModules' flag is provided." },
+        Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode: { code: 1210, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode_1210", message: "Invalid use of '{0}'. Class definitions are automatically in strict mode." },
+        A_class_declaration_without_the_default_modifier_must_have_a_name: { code: 1211, category: ts.DiagnosticCategory.Error, key: "A_class_declaration_without_the_default_modifier_must_have_a_name_1211", message: "A class declaration without the 'default' modifier must have a name" },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode: { code: 1212, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_1212", message: "Identifier expected. '{0}' is a reserved word in strict mode" },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode: { code: 1213, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_stric_1213", message: "Identifier expected. '{0}' is a reserved word in strict mode. Class definitions are automatically in strict mode." },
+        Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode: { code: 1214, category: ts.DiagnosticCategory.Error, key: "Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode_1214", message: "Identifier expected. '{0}' is a reserved word in strict mode. Modules are automatically in strict mode." },
+        Invalid_use_of_0_Modules_are_automatically_in_strict_mode: { code: 1215, category: ts.DiagnosticCategory.Error, key: "Invalid_use_of_0_Modules_are_automatically_in_strict_mode_1215", message: "Invalid use of '{0}'. Modules are automatically in strict mode." },
+        Export_assignment_is_not_supported_when_module_flag_is_system: { code: 1218, category: ts.DiagnosticCategory.Error, key: "Export_assignment_is_not_supported_when_module_flag_is_system_1218", message: "Export assignment is not supported when '--module' flag is 'system'." },
+        Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning: { code: 1219, category: ts.DiagnosticCategory.Error, key: "Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_t_1219", message: "Experimental support for decorators is a feature that is subject to change in a future release. Set the 'experimentalDecorators' option to remove this warning." },
+        Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1220, category: ts.DiagnosticCategory.Error, key: "Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher_1220", message: "Generators are only available when targeting ECMAScript 2015 or higher." },
+        Generators_are_not_allowed_in_an_ambient_context: { code: 1221, category: ts.DiagnosticCategory.Error, key: "Generators_are_not_allowed_in_an_ambient_context_1221", message: "Generators are not allowed in an ambient context." },
+        An_overload_signature_cannot_be_declared_as_a_generator: { code: 1222, category: ts.DiagnosticCategory.Error, key: "An_overload_signature_cannot_be_declared_as_a_generator_1222", message: "An overload signature cannot be declared as a generator." },
+        _0_tag_already_specified: { code: 1223, category: ts.DiagnosticCategory.Error, key: "_0_tag_already_specified_1223", message: "'{0}' tag already specified." },
+        Signature_0_must_have_a_type_predicate: { code: 1224, category: ts.DiagnosticCategory.Error, key: "Signature_0_must_have_a_type_predicate_1224", message: "Signature '{0}' must have a type predicate." },
+        Cannot_find_parameter_0: { code: 1225, category: ts.DiagnosticCategory.Error, key: "Cannot_find_parameter_0_1225", message: "Cannot find parameter '{0}'." },
+        Type_predicate_0_is_not_assignable_to_1: { code: 1226, category: ts.DiagnosticCategory.Error, key: "Type_predicate_0_is_not_assignable_to_1_1226", message: "Type predicate '{0}' is not assignable to '{1}'." },
+        Parameter_0_is_not_in_the_same_position_as_parameter_1: { code: 1227, category: ts.DiagnosticCategory.Error, key: "Parameter_0_is_not_in_the_same_position_as_parameter_1_1227", message: "Parameter '{0}' is not in the same position as parameter '{1}'." },
+        A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods: { code: 1228, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods_1228", message: "A type predicate is only allowed in return type position for functions and methods." },
+        A_type_predicate_cannot_reference_a_rest_parameter: { code: 1229, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_a_rest_parameter_1229", message: "A type predicate cannot reference a rest parameter." },
+        A_type_predicate_cannot_reference_element_0_in_a_binding_pattern: { code: 1230, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_cannot_reference_element_0_in_a_binding_pattern_1230", message: "A type predicate cannot reference element '{0}' in a binding pattern." },
+        An_export_assignment_can_only_be_used_in_a_module: { code: 1231, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_can_only_be_used_in_a_module_1231", message: "An export assignment can only be used in a module." },
+        An_import_declaration_can_only_be_used_in_a_namespace_or_module: { code: 1232, category: ts.DiagnosticCategory.Error, key: "An_import_declaration_can_only_be_used_in_a_namespace_or_module_1232", message: "An import declaration can only be used in a namespace or module." },
+        An_export_declaration_can_only_be_used_in_a_module: { code: 1233, category: ts.DiagnosticCategory.Error, key: "An_export_declaration_can_only_be_used_in_a_module_1233", message: "An export declaration can only be used in a module." },
+        An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file: { code: 1234, category: ts.DiagnosticCategory.Error, key: "An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file_1234", message: "An ambient module declaration is only allowed at the top level in a file." },
+        A_namespace_declaration_is_only_allowed_in_a_namespace_or_module: { code: 1235, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_is_only_allowed_in_a_namespace_or_module_1235", message: "A namespace declaration is only allowed in a namespace or module." },
+        The_return_type_of_a_property_decorator_function_must_be_either_void_or_any: { code: 1236, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_property_decorator_function_must_be_either_void_or_any_1236", message: "The return type of a property decorator function must be either 'void' or 'any'." },
+        The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any: { code: 1237, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any_1237", message: "The return type of a parameter decorator function must be either 'void' or 'any'." },
+        Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression: { code: 1238, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression_1238", message: "Unable to resolve signature of class decorator when called as an expression." },
+        Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression: { code: 1239, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression_1239", message: "Unable to resolve signature of parameter decorator when called as an expression." },
+        Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression: { code: 1240, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression_1240", message: "Unable to resolve signature of property decorator when called as an expression." },
+        Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression: { code: 1241, category: ts.DiagnosticCategory.Error, key: "Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression_1241", message: "Unable to resolve signature of method decorator when called as an expression." },
+        abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration: { code: 1242, category: ts.DiagnosticCategory.Error, key: "abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration_1242", message: "'abstract' modifier can only appear on a class, method, or property declaration." },
+        _0_modifier_cannot_be_used_with_1_modifier: { code: 1243, category: ts.DiagnosticCategory.Error, key: "_0_modifier_cannot_be_used_with_1_modifier_1243", message: "'{0}' modifier cannot be used with '{1}' modifier." },
+        Abstract_methods_can_only_appear_within_an_abstract_class: { code: 1244, category: ts.DiagnosticCategory.Error, key: "Abstract_methods_can_only_appear_within_an_abstract_class_1244", message: "Abstract methods can only appear within an abstract class." },
+        Method_0_cannot_have_an_implementation_because_it_is_marked_abstract: { code: 1245, category: ts.DiagnosticCategory.Error, key: "Method_0_cannot_have_an_implementation_because_it_is_marked_abstract_1245", message: "Method '{0}' cannot have an implementation because it is marked abstract." },
+        An_interface_property_cannot_have_an_initializer: { code: 1246, category: ts.DiagnosticCategory.Error, key: "An_interface_property_cannot_have_an_initializer_1246", message: "An interface property cannot have an initializer." },
+        A_type_literal_property_cannot_have_an_initializer: { code: 1247, category: ts.DiagnosticCategory.Error, key: "A_type_literal_property_cannot_have_an_initializer_1247", message: "A type literal property cannot have an initializer." },
+        A_class_member_cannot_have_the_0_keyword: { code: 1248, category: ts.DiagnosticCategory.Error, key: "A_class_member_cannot_have_the_0_keyword_1248", message: "A class member cannot have the '{0}' keyword." },
+        A_decorator_can_only_decorate_a_method_implementation_not_an_overload: { code: 1249, category: ts.DiagnosticCategory.Error, key: "A_decorator_can_only_decorate_a_method_implementation_not_an_overload_1249", message: "A decorator can only decorate a method implementation, not an overload." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5: { code: 1250, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_1250", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode: { code: 1251, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_d_1251", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Class definitions are automatically in strict mode." },
+        Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode: { code: 1252, category: ts.DiagnosticCategory.Error, key: "Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_1252", message: "Function declarations are not allowed inside blocks in strict mode when targeting 'ES3' or 'ES5'. Modules are automatically in strict mode." },
+        _0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag: { code: 1253, category: ts.DiagnosticCategory.Error, key: "_0_tag_cannot_be_used_independently_as_a_top_level_JSDoc_tag_1253", message: "'{0}' tag cannot be used independently as a top level JSDoc tag." },
+        with_statements_are_not_allowed_in_an_async_function_block: { code: 1300, category: ts.DiagnosticCategory.Error, key: "with_statements_are_not_allowed_in_an_async_function_block_1300", message: "'with' statements are not allowed in an async function block." },
+        await_expression_is_only_allowed_within_an_async_function: { code: 1308, category: ts.DiagnosticCategory.Error, key: "await_expression_is_only_allowed_within_an_async_function_1308", message: "'await' expression is only allowed within an async function." },
+        Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher: { code: 1311, category: ts.DiagnosticCategory.Error, key: "Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher_1311", message: "Async functions are only available when targeting ECMAScript 2015 or higher." },
+        can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment: { code: 1312, category: ts.DiagnosticCategory.Error, key: "can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment_1312", message: "'=' can only be used in an object literal property inside a destructuring assignment." },
+        The_body_of_an_if_statement_cannot_be_the_empty_statement: { code: 1313, category: ts.DiagnosticCategory.Error, key: "The_body_of_an_if_statement_cannot_be_the_empty_statement_1313", message: "The body of an 'if' statement cannot be the empty statement." },
+        Global_module_exports_may_only_appear_in_module_files: { code: 1314, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_module_files_1314", message: "Global module exports may only appear in module files." },
+        Global_module_exports_may_only_appear_in_declaration_files: { code: 1315, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_in_declaration_files_1315", message: "Global module exports may only appear in declaration files." },
+        Global_module_exports_may_only_appear_at_top_level: { code: 1316, category: ts.DiagnosticCategory.Error, key: "Global_module_exports_may_only_appear_at_top_level_1316", message: "Global module exports may only appear at top level." },
+        Duplicate_identifier_0: { code: 2300, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_2300", message: "Duplicate identifier '{0}'." },
+        Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor: { code: 2301, category: ts.DiagnosticCategory.Error, key: "Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor_2301", message: "Initializer of instance member variable '{0}' cannot reference identifier '{1}' declared in the constructor." },
+        Static_members_cannot_reference_class_type_parameters: { code: 2302, category: ts.DiagnosticCategory.Error, key: "Static_members_cannot_reference_class_type_parameters_2302", message: "Static members cannot reference class type parameters." },
+        Circular_definition_of_import_alias_0: { code: 2303, category: ts.DiagnosticCategory.Error, key: "Circular_definition_of_import_alias_0_2303", message: "Circular definition of import alias '{0}'." },
+        Cannot_find_name_0: { code: 2304, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_2304", message: "Cannot find name '{0}'." },
+        Module_0_has_no_exported_member_1: { code: 2305, category: ts.DiagnosticCategory.Error, key: "Module_0_has_no_exported_member_1_2305", message: "Module '{0}' has no exported member '{1}'." },
+        File_0_is_not_a_module: { code: 2306, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_a_module_2306", message: "File '{0}' is not a module." },
+        Cannot_find_module_0: { code: 2307, category: ts.DiagnosticCategory.Error, key: "Cannot_find_module_0_2307", message: "Cannot find module '{0}'." },
+        Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity: { code: 2308, category: ts.DiagnosticCategory.Error, key: "Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambig_2308", message: "Module {0} has already exported a member named '{1}'. Consider explicitly re-exporting to resolve the ambiguity." },
+        An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements: { code: 2309, category: ts.DiagnosticCategory.Error, key: "An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements_2309", message: "An export assignment cannot be used in a module with other exported elements." },
+        Type_0_recursively_references_itself_as_a_base_type: { code: 2310, category: ts.DiagnosticCategory.Error, key: "Type_0_recursively_references_itself_as_a_base_type_2310", message: "Type '{0}' recursively references itself as a base type." },
+        A_class_may_only_extend_another_class: { code: 2311, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_extend_another_class_2311", message: "A class may only extend another class." },
+        An_interface_may_only_extend_a_class_or_another_interface: { code: 2312, category: ts.DiagnosticCategory.Error, key: "An_interface_may_only_extend_a_class_or_another_interface_2312", message: "An interface may only extend a class or another interface." },
+        Type_parameter_0_has_a_circular_constraint: { code: 2313, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_has_a_circular_constraint_2313", message: "Type parameter '{0}' has a circular constraint." },
+        Generic_type_0_requires_1_type_argument_s: { code: 2314, category: ts.DiagnosticCategory.Error, key: "Generic_type_0_requires_1_type_argument_s_2314", message: "Generic type '{0}' requires {1} type argument(s)." },
+        Type_0_is_not_generic: { code: 2315, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_generic_2315", message: "Type '{0}' is not generic." },
+        Global_type_0_must_be_a_class_or_interface_type: { code: 2316, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_be_a_class_or_interface_type_2316", message: "Global type '{0}' must be a class or interface type." },
+        Global_type_0_must_have_1_type_parameter_s: { code: 2317, category: ts.DiagnosticCategory.Error, key: "Global_type_0_must_have_1_type_parameter_s_2317", message: "Global type '{0}' must have {1} type parameter(s)." },
+        Cannot_find_global_type_0: { code: 2318, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_type_0_2318", message: "Cannot find global type '{0}'." },
+        Named_property_0_of_types_1_and_2_are_not_identical: { code: 2319, category: ts.DiagnosticCategory.Error, key: "Named_property_0_of_types_1_and_2_are_not_identical_2319", message: "Named property '{0}' of types '{1}' and '{2}' are not identical." },
+        Interface_0_cannot_simultaneously_extend_types_1_and_2: { code: 2320, category: ts.DiagnosticCategory.Error, key: "Interface_0_cannot_simultaneously_extend_types_1_and_2_2320", message: "Interface '{0}' cannot simultaneously extend types '{1}' and '{2}'." },
+        Excessive_stack_depth_comparing_types_0_and_1: { code: 2321, category: ts.DiagnosticCategory.Error, key: "Excessive_stack_depth_comparing_types_0_and_1_2321", message: "Excessive stack depth comparing types '{0}' and '{1}'." },
+        Type_0_is_not_assignable_to_type_1: { code: 2322, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_assignable_to_type_1_2322", message: "Type '{0}' is not assignable to type '{1}'." },
+        Cannot_redeclare_exported_variable_0: { code: 2323, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_exported_variable_0_2323", message: "Cannot redeclare exported variable '{0}'." },
+        Property_0_is_missing_in_type_1: { code: 2324, category: ts.DiagnosticCategory.Error, key: "Property_0_is_missing_in_type_1_2324", message: "Property '{0}' is missing in type '{1}'." },
+        Property_0_is_private_in_type_1_but_not_in_type_2: { code: 2325, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_in_type_1_but_not_in_type_2_2325", message: "Property '{0}' is private in type '{1}' but not in type '{2}'." },
+        Types_of_property_0_are_incompatible: { code: 2326, category: ts.DiagnosticCategory.Error, key: "Types_of_property_0_are_incompatible_2326", message: "Types of property '{0}' are incompatible." },
+        Property_0_is_optional_in_type_1_but_required_in_type_2: { code: 2327, category: ts.DiagnosticCategory.Error, key: "Property_0_is_optional_in_type_1_but_required_in_type_2_2327", message: "Property '{0}' is optional in type '{1}' but required in type '{2}'." },
+        Types_of_parameters_0_and_1_are_incompatible: { code: 2328, category: ts.DiagnosticCategory.Error, key: "Types_of_parameters_0_and_1_are_incompatible_2328", message: "Types of parameters '{0}' and '{1}' are incompatible." },
+        Index_signature_is_missing_in_type_0: { code: 2329, category: ts.DiagnosticCategory.Error, key: "Index_signature_is_missing_in_type_0_2329", message: "Index signature is missing in type '{0}'." },
+        Index_signatures_are_incompatible: { code: 2330, category: ts.DiagnosticCategory.Error, key: "Index_signatures_are_incompatible_2330", message: "Index signatures are incompatible." },
+        this_cannot_be_referenced_in_a_module_or_namespace_body: { code: 2331, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_module_or_namespace_body_2331", message: "'this' cannot be referenced in a module or namespace body." },
+        this_cannot_be_referenced_in_current_location: { code: 2332, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_current_location_2332", message: "'this' cannot be referenced in current location." },
+        this_cannot_be_referenced_in_constructor_arguments: { code: 2333, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_constructor_arguments_2333", message: "'this' cannot be referenced in constructor arguments." },
+        this_cannot_be_referenced_in_a_static_property_initializer: { code: 2334, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_static_property_initializer_2334", message: "'this' cannot be referenced in a static property initializer." },
+        super_can_only_be_referenced_in_a_derived_class: { code: 2335, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_a_derived_class_2335", message: "'super' can only be referenced in a derived class." },
+        super_cannot_be_referenced_in_constructor_arguments: { code: 2336, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_constructor_arguments_2336", message: "'super' cannot be referenced in constructor arguments." },
+        Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors: { code: 2337, category: ts.DiagnosticCategory.Error, key: "Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors_2337", message: "Super calls are not permitted outside constructors or in nested functions inside constructors." },
+        super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class: { code: 2338, category: ts.DiagnosticCategory.Error, key: "super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_der_2338", message: "'super' property access is permitted only in a constructor, member function, or member accessor of a derived class." },
+        Property_0_does_not_exist_on_type_1: { code: 2339, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_type_1_2339", message: "Property '{0}' does not exist on type '{1}'." },
+        Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword: { code: 2340, category: ts.DiagnosticCategory.Error, key: "Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword_2340", message: "Only public and protected methods of the base class are accessible via the 'super' keyword." },
+        Property_0_is_private_and_only_accessible_within_class_1: { code: 2341, category: ts.DiagnosticCategory.Error, key: "Property_0_is_private_and_only_accessible_within_class_1_2341", message: "Property '{0}' is private and only accessible within class '{1}'." },
+        An_index_expression_argument_must_be_of_type_string_number_symbol_or_any: { code: 2342, category: ts.DiagnosticCategory.Error, key: "An_index_expression_argument_must_be_of_type_string_number_symbol_or_any_2342", message: "An index expression argument must be of type 'string', 'number', 'symbol', or 'any'." },
+        Type_0_does_not_satisfy_the_constraint_1: { code: 2344, category: ts.DiagnosticCategory.Error, key: "Type_0_does_not_satisfy_the_constraint_1_2344", message: "Type '{0}' does not satisfy the constraint '{1}'." },
+        Argument_of_type_0_is_not_assignable_to_parameter_of_type_1: { code: 2345, category: ts.DiagnosticCategory.Error, key: "Argument_of_type_0_is_not_assignable_to_parameter_of_type_1_2345", message: "Argument of type '{0}' is not assignable to parameter of type '{1}'." },
+        Supplied_parameters_do_not_match_any_signature_of_call_target: { code: 2346, category: ts.DiagnosticCategory.Error, key: "Supplied_parameters_do_not_match_any_signature_of_call_target_2346", message: "Supplied parameters do not match any signature of call target." },
+        Untyped_function_calls_may_not_accept_type_arguments: { code: 2347, category: ts.DiagnosticCategory.Error, key: "Untyped_function_calls_may_not_accept_type_arguments_2347", message: "Untyped function calls may not accept type arguments." },
+        Value_of_type_0_is_not_callable_Did_you_mean_to_include_new: { code: 2348, category: ts.DiagnosticCategory.Error, key: "Value_of_type_0_is_not_callable_Did_you_mean_to_include_new_2348", message: "Value of type '{0}' is not callable. Did you mean to include 'new'?" },
+        Cannot_invoke_an_expression_whose_type_lacks_a_call_signature: { code: 2349, category: ts.DiagnosticCategory.Error, key: "Cannot_invoke_an_expression_whose_type_lacks_a_call_signature_2349", message: "Cannot invoke an expression whose type lacks a call signature." },
+        Only_a_void_function_can_be_called_with_the_new_keyword: { code: 2350, category: ts.DiagnosticCategory.Error, key: "Only_a_void_function_can_be_called_with_the_new_keyword_2350", message: "Only a void function can be called with the 'new' keyword." },
+        Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature: { code: 2351, category: ts.DiagnosticCategory.Error, key: "Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature_2351", message: "Cannot use 'new' with an expression whose type lacks a call or construct signature." },
+        Type_0_cannot_be_converted_to_type_1: { code: 2352, category: ts.DiagnosticCategory.Error, key: "Type_0_cannot_be_converted_to_type_1_2352", message: "Type '{0}' cannot be converted to type '{1}'." },
+        Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1: { code: 2353, category: ts.DiagnosticCategory.Error, key: "Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1_2353", message: "Object literal may only specify known properties, and '{0}' does not exist in type '{1}'." },
+        No_best_common_type_exists_among_return_expressions: { code: 2354, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_return_expressions_2354", message: "No best common type exists among return expressions." },
+        A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value: { code: 2355, category: ts.DiagnosticCategory.Error, key: "A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value_2355", message: "A function whose declared type is neither 'void' nor 'any' must return a value." },
+        An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type: { code: 2356, category: ts.DiagnosticCategory.Error, key: "An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type_2356", message: "An arithmetic operand must be of type 'any', 'number' or an enum type." },
+        The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer: { code: 2357, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer_2357", message: "The operand of an increment or decrement operator must be a variable, property or indexer." },
+        The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2358, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_paramete_2358", message: "The left-hand side of an 'instanceof' expression must be of type 'any', an object type or a type parameter." },
+        The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type: { code: 2359, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_F_2359", message: "The right-hand side of an 'instanceof' expression must be of type 'any' or of a type assignable to the 'Function' interface type." },
+        The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol: { code: 2360, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol_2360", message: "The left-hand side of an 'in' expression must be of type 'any', 'string', 'number', or 'symbol'." },
+        The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2361, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter_2361", message: "The right-hand side of an 'in' expression must be of type 'any', an object type or a type parameter" },
+        The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2362, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2362", message: "The left-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type: { code: 2363, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type_2363", message: "The right-hand side of an arithmetic operation must be of type 'any', 'number' or an enum type." },
+        Invalid_left_hand_side_of_assignment_expression: { code: 2364, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_of_assignment_expression_2364", message: "Invalid left-hand side of assignment expression." },
+        Operator_0_cannot_be_applied_to_types_1_and_2: { code: 2365, category: ts.DiagnosticCategory.Error, key: "Operator_0_cannot_be_applied_to_types_1_and_2_2365", message: "Operator '{0}' cannot be applied to types '{1}' and '{2}'." },
+        Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined: { code: 2366, category: ts.DiagnosticCategory.Error, key: "Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined_2366", message: "Function lacks ending return statement and return type does not include 'undefined'." },
+        Type_parameter_name_cannot_be_0: { code: 2368, category: ts.DiagnosticCategory.Error, key: "Type_parameter_name_cannot_be_0_2368", message: "Type parameter name cannot be '{0}'" },
+        A_parameter_property_is_only_allowed_in_a_constructor_implementation: { code: 2369, category: ts.DiagnosticCategory.Error, key: "A_parameter_property_is_only_allowed_in_a_constructor_implementation_2369", message: "A parameter property is only allowed in a constructor implementation." },
+        A_rest_parameter_must_be_of_an_array_type: { code: 2370, category: ts.DiagnosticCategory.Error, key: "A_rest_parameter_must_be_of_an_array_type_2370", message: "A rest parameter must be of an array type." },
+        A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation: { code: 2371, category: ts.DiagnosticCategory.Error, key: "A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation_2371", message: "A parameter initializer is only allowed in a function or constructor implementation." },
+        Parameter_0_cannot_be_referenced_in_its_initializer: { code: 2372, category: ts.DiagnosticCategory.Error, key: "Parameter_0_cannot_be_referenced_in_its_initializer_2372", message: "Parameter '{0}' cannot be referenced in its initializer." },
+        Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it: { code: 2373, category: ts.DiagnosticCategory.Error, key: "Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it_2373", message: "Initializer of parameter '{0}' cannot reference identifier '{1}' declared after it." },
+        Duplicate_string_index_signature: { code: 2374, category: ts.DiagnosticCategory.Error, key: "Duplicate_string_index_signature_2374", message: "Duplicate string index signature." },
+        Duplicate_number_index_signature: { code: 2375, category: ts.DiagnosticCategory.Error, key: "Duplicate_number_index_signature_2375", message: "Duplicate number index signature." },
+        A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties: { code: 2376, category: ts.DiagnosticCategory.Error, key: "A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_proper_2376", message: "A 'super' call must be the first statement in the constructor when a class contains initialized properties or has parameter properties." },
+        Constructors_for_derived_classes_must_contain_a_super_call: { code: 2377, category: ts.DiagnosticCategory.Error, key: "Constructors_for_derived_classes_must_contain_a_super_call_2377", message: "Constructors for derived classes must contain a 'super' call." },
+        A_get_accessor_must_return_a_value: { code: 2378, category: ts.DiagnosticCategory.Error, key: "A_get_accessor_must_return_a_value_2378", message: "A 'get' accessor must return a value." },
+        Getter_and_setter_accessors_do_not_agree_in_visibility: { code: 2379, category: ts.DiagnosticCategory.Error, key: "Getter_and_setter_accessors_do_not_agree_in_visibility_2379", message: "Getter and setter accessors do not agree in visibility." },
+        get_and_set_accessor_must_have_the_same_type: { code: 2380, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_type_2380", message: "'get' and 'set' accessor must have the same type." },
+        A_signature_with_an_implementation_cannot_use_a_string_literal_type: { code: 2381, category: ts.DiagnosticCategory.Error, key: "A_signature_with_an_implementation_cannot_use_a_string_literal_type_2381", message: "A signature with an implementation cannot use a string literal type." },
+        Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature: { code: 2382, category: ts.DiagnosticCategory.Error, key: "Specialized_overload_signature_is_not_assignable_to_any_non_specialized_signature_2382", message: "Specialized overload signature is not assignable to any non-specialized signature." },
+        Overload_signatures_must_all_be_exported_or_non_exported: { code: 2383, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_exported_or_non_exported_2383", message: "Overload signatures must all be exported or non-exported." },
+        Overload_signatures_must_all_be_ambient_or_non_ambient: { code: 2384, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_ambient_or_non_ambient_2384", message: "Overload signatures must all be ambient or non-ambient." },
+        Overload_signatures_must_all_be_public_private_or_protected: { code: 2385, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_public_private_or_protected_2385", message: "Overload signatures must all be public, private or protected." },
+        Overload_signatures_must_all_be_optional_or_required: { code: 2386, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_optional_or_required_2386", message: "Overload signatures must all be optional or required." },
+        Function_overload_must_be_static: { code: 2387, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_be_static_2387", message: "Function overload must be static." },
+        Function_overload_must_not_be_static: { code: 2388, category: ts.DiagnosticCategory.Error, key: "Function_overload_must_not_be_static_2388", message: "Function overload must not be static." },
+        Function_implementation_name_must_be_0: { code: 2389, category: ts.DiagnosticCategory.Error, key: "Function_implementation_name_must_be_0_2389", message: "Function implementation name must be '{0}'." },
+        Constructor_implementation_is_missing: { code: 2390, category: ts.DiagnosticCategory.Error, key: "Constructor_implementation_is_missing_2390", message: "Constructor implementation is missing." },
+        Function_implementation_is_missing_or_not_immediately_following_the_declaration: { code: 2391, category: ts.DiagnosticCategory.Error, key: "Function_implementation_is_missing_or_not_immediately_following_the_declaration_2391", message: "Function implementation is missing or not immediately following the declaration." },
+        Multiple_constructor_implementations_are_not_allowed: { code: 2392, category: ts.DiagnosticCategory.Error, key: "Multiple_constructor_implementations_are_not_allowed_2392", message: "Multiple constructor implementations are not allowed." },
+        Duplicate_function_implementation: { code: 2393, category: ts.DiagnosticCategory.Error, key: "Duplicate_function_implementation_2393", message: "Duplicate function implementation." },
+        Overload_signature_is_not_compatible_with_function_implementation: { code: 2394, category: ts.DiagnosticCategory.Error, key: "Overload_signature_is_not_compatible_with_function_implementation_2394", message: "Overload signature is not compatible with function implementation." },
+        Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local: { code: 2395, category: ts.DiagnosticCategory.Error, key: "Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local_2395", message: "Individual declarations in merged declaration '{0}' must be all exported or all local." },
+        Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters: { code: 2396, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters_2396", message: "Duplicate identifier 'arguments'. Compiler uses 'arguments' to initialize rest parameters." },
+        Declaration_name_conflicts_with_built_in_global_identifier_0: { code: 2397, category: ts.DiagnosticCategory.Error, key: "Declaration_name_conflicts_with_built_in_global_identifier_0_2397", message: "Declaration name conflicts with built-in global identifier '{0}'." },
+        Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference: { code: 2399, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference_2399", message: "Duplicate identifier '_this'. Compiler uses variable declaration '_this' to capture 'this' reference." },
+        Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference: { code: 2400, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference_2400", message: "Expression resolves to variable declaration '_this' that compiler uses to capture 'this' reference." },
+        Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference: { code: 2401, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference_2401", message: "Duplicate identifier '_super'. Compiler uses '_super' to capture base class reference." },
+        Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference: { code: 2402, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference_2402", message: "Expression resolves to '_super' that compiler uses to capture base class reference." },
+        Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2: { code: 2403, category: ts.DiagnosticCategory.Error, key: "Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_t_2403", message: "Subsequent variable declarations must have the same type.  Variable '{0}' must be of type '{1}', but here has type '{2}'." },
+        The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation: { code: 2404, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation_2404", message: "The left-hand side of a 'for...in' statement cannot use a type annotation." },
+        The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any: { code: 2405, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any_2405", message: "The left-hand side of a 'for...in' statement must be of type 'string' or 'any'." },
+        Invalid_left_hand_side_in_for_in_statement: { code: 2406, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_in_statement_2406", message: "Invalid left-hand side in 'for...in' statement." },
+        The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter: { code: 2407, category: ts.DiagnosticCategory.Error, key: "The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter_2407", message: "The right-hand side of a 'for...in' statement must be of type 'any', an object type or a type parameter." },
+        Setters_cannot_return_a_value: { code: 2408, category: ts.DiagnosticCategory.Error, key: "Setters_cannot_return_a_value_2408", message: "Setters cannot return a value." },
+        Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class: { code: 2409, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class_2409", message: "Return type of constructor signature must be assignable to the instance type of the class" },
+        All_symbols_within_a_with_block_will_be_resolved_to_any: { code: 2410, category: ts.DiagnosticCategory.Error, key: "All_symbols_within_a_with_block_will_be_resolved_to_any_2410", message: "All symbols within a 'with' block will be resolved to 'any'." },
+        Property_0_of_type_1_is_not_assignable_to_string_index_type_2: { code: 2411, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_string_index_type_2_2411", message: "Property '{0}' of type '{1}' is not assignable to string index type '{2}'." },
+        Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2: { code: 2412, category: ts.DiagnosticCategory.Error, key: "Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2_2412", message: "Property '{0}' of type '{1}' is not assignable to numeric index type '{2}'." },
+        Numeric_index_type_0_is_not_assignable_to_string_index_type_1: { code: 2413, category: ts.DiagnosticCategory.Error, key: "Numeric_index_type_0_is_not_assignable_to_string_index_type_1_2413", message: "Numeric index type '{0}' is not assignable to string index type '{1}'." },
+        Class_name_cannot_be_0: { code: 2414, category: ts.DiagnosticCategory.Error, key: "Class_name_cannot_be_0_2414", message: "Class name cannot be '{0}'" },
+        Class_0_incorrectly_extends_base_class_1: { code: 2415, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_extends_base_class_1_2415", message: "Class '{0}' incorrectly extends base class '{1}'." },
+        Class_static_side_0_incorrectly_extends_base_class_static_side_1: { code: 2417, category: ts.DiagnosticCategory.Error, key: "Class_static_side_0_incorrectly_extends_base_class_static_side_1_2417", message: "Class static side '{0}' incorrectly extends base class static side '{1}'." },
+        Class_0_incorrectly_implements_interface_1: { code: 2420, category: ts.DiagnosticCategory.Error, key: "Class_0_incorrectly_implements_interface_1_2420", message: "Class '{0}' incorrectly implements interface '{1}'." },
+        A_class_may_only_implement_another_class_or_interface: { code: 2422, category: ts.DiagnosticCategory.Error, key: "A_class_may_only_implement_another_class_or_interface_2422", message: "A class may only implement another class or interface." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor: { code: 2423, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_access_2423", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member accessor." },
+        Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property: { code: 2424, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_proper_2424", message: "Class '{0}' defines instance member function '{1}', but extended class '{2}' defines it as instance member property." },
+        Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2425, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_functi_2425", message: "Class '{0}' defines instance member property '{1}', but extended class '{2}' defines it as instance member function." },
+        Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function: { code: 2426, category: ts.DiagnosticCategory.Error, key: "Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_functi_2426", message: "Class '{0}' defines instance member accessor '{1}', but extended class '{2}' defines it as instance member function." },
+        Interface_name_cannot_be_0: { code: 2427, category: ts.DiagnosticCategory.Error, key: "Interface_name_cannot_be_0_2427", message: "Interface name cannot be '{0}'" },
+        All_declarations_of_0_must_have_identical_type_parameters: { code: 2428, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_type_parameters_2428", message: "All declarations of '{0}' must have identical type parameters." },
+        Interface_0_incorrectly_extends_interface_1: { code: 2430, category: ts.DiagnosticCategory.Error, key: "Interface_0_incorrectly_extends_interface_1_2430", message: "Interface '{0}' incorrectly extends interface '{1}'." },
+        Enum_name_cannot_be_0: { code: 2431, category: ts.DiagnosticCategory.Error, key: "Enum_name_cannot_be_0_2431", message: "Enum name cannot be '{0}'" },
+        In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element: { code: 2432, category: ts.DiagnosticCategory.Error, key: "In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enu_2432", message: "In an enum with multiple declarations, only one declaration can omit an initializer for its first enum element." },
+        A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged: { code: 2433, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merg_2433", message: "A namespace declaration cannot be in a different file from a class or function with which it is merged" },
+        A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged: { code: 2434, category: ts.DiagnosticCategory.Error, key: "A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged_2434", message: "A namespace declaration cannot be located prior to a class or function with which it is merged" },
+        Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces: { code: 2435, category: ts.DiagnosticCategory.Error, key: "Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces_2435", message: "Ambient modules cannot be nested in other modules or namespaces." },
+        Ambient_module_declaration_cannot_specify_relative_module_name: { code: 2436, category: ts.DiagnosticCategory.Error, key: "Ambient_module_declaration_cannot_specify_relative_module_name_2436", message: "Ambient module declaration cannot specify relative module name." },
+        Module_0_is_hidden_by_a_local_declaration_with_the_same_name: { code: 2437, category: ts.DiagnosticCategory.Error, key: "Module_0_is_hidden_by_a_local_declaration_with_the_same_name_2437", message: "Module '{0}' is hidden by a local declaration with the same name" },
+        Import_name_cannot_be_0: { code: 2438, category: ts.DiagnosticCategory.Error, key: "Import_name_cannot_be_0_2438", message: "Import name cannot be '{0}'" },
+        Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name: { code: 2439, category: ts.DiagnosticCategory.Error, key: "Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relati_2439", message: "Import or export declaration in an ambient module declaration cannot reference module through relative module name." },
+        Import_declaration_conflicts_with_local_declaration_of_0: { code: 2440, category: ts.DiagnosticCategory.Error, key: "Import_declaration_conflicts_with_local_declaration_of_0_2440", message: "Import declaration conflicts with local declaration of '{0}'" },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module: { code: 2441, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_2441", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module." },
+        Types_have_separate_declarations_of_a_private_property_0: { code: 2442, category: ts.DiagnosticCategory.Error, key: "Types_have_separate_declarations_of_a_private_property_0_2442", message: "Types have separate declarations of a private property '{0}'." },
+        Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2: { code: 2443, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2_2443", message: "Property '{0}' is protected but type '{1}' is not a class derived from '{2}'." },
+        Property_0_is_protected_in_type_1_but_public_in_type_2: { code: 2444, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_in_type_1_but_public_in_type_2_2444", message: "Property '{0}' is protected in type '{1}' but public in type '{2}'." },
+        Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses: { code: 2445, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses_2445", message: "Property '{0}' is protected and only accessible within class '{1}' and its subclasses." },
+        Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1: { code: 2446, category: ts.DiagnosticCategory.Error, key: "Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1_2446", message: "Property '{0}' is protected and only accessible through an instance of class '{1}'." },
+        The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead: { code: 2447, category: ts.DiagnosticCategory.Error, key: "The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead_2447", message: "The '{0}' operator is not allowed for boolean types. Consider using '{1}' instead." },
+        Block_scoped_variable_0_used_before_its_declaration: { code: 2448, category: ts.DiagnosticCategory.Error, key: "Block_scoped_variable_0_used_before_its_declaration_2448", message: "Block-scoped variable '{0}' used before its declaration." },
+        The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property: { code: 2449, category: ts.DiagnosticCategory.Error, key: "The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property_2449", message: "The operand of an increment or decrement operator cannot be a constant or a read-only property." },
+        Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property: { code: 2450, category: ts.DiagnosticCategory.Error, key: "Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property_2450", message: "Left-hand side of assignment expression cannot be a constant or a read-only property." },
+        Cannot_redeclare_block_scoped_variable_0: { code: 2451, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_block_scoped_variable_0_2451", message: "Cannot redeclare block-scoped variable '{0}'." },
+        An_enum_member_cannot_have_a_numeric_name: { code: 2452, category: ts.DiagnosticCategory.Error, key: "An_enum_member_cannot_have_a_numeric_name_2452", message: "An enum member cannot have a numeric name." },
+        The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly: { code: 2453, category: ts.DiagnosticCategory.Error, key: "The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_typ_2453", message: "The type argument for type parameter '{0}' cannot be inferred from the usage. Consider specifying the type arguments explicitly." },
+        Variable_0_is_used_before_being_assigned: { code: 2454, category: ts.DiagnosticCategory.Error, key: "Variable_0_is_used_before_being_assigned_2454", message: "Variable '{0}' is used before being assigned." },
+        Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0: { code: 2455, category: ts.DiagnosticCategory.Error, key: "Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0_2455", message: "Type argument candidate '{1}' is not a valid type argument because it is not a supertype of candidate '{0}'." },
+        Type_alias_0_circularly_references_itself: { code: 2456, category: ts.DiagnosticCategory.Error, key: "Type_alias_0_circularly_references_itself_2456", message: "Type alias '{0}' circularly references itself." },
+        Type_alias_name_cannot_be_0: { code: 2457, category: ts.DiagnosticCategory.Error, key: "Type_alias_name_cannot_be_0_2457", message: "Type alias name cannot be '{0}'" },
+        An_AMD_module_cannot_have_multiple_name_assignments: { code: 2458, category: ts.DiagnosticCategory.Error, key: "An_AMD_module_cannot_have_multiple_name_assignments_2458", message: "An AMD module cannot have multiple name assignments." },
+        Type_0_has_no_property_1_and_no_string_index_signature: { code: 2459, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_and_no_string_index_signature_2459", message: "Type '{0}' has no property '{1}' and no string index signature." },
+        Type_0_has_no_property_1: { code: 2460, category: ts.DiagnosticCategory.Error, key: "Type_0_has_no_property_1_2460", message: "Type '{0}' has no property '{1}'." },
+        Type_0_is_not_an_array_type: { code: 2461, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_2461", message: "Type '{0}' is not an array type." },
+        A_rest_element_must_be_last_in_an_array_destructuring_pattern: { code: 2462, category: ts.DiagnosticCategory.Error, key: "A_rest_element_must_be_last_in_an_array_destructuring_pattern_2462", message: "A rest element must be last in an array destructuring pattern" },
+        A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature: { code: 2463, category: ts.DiagnosticCategory.Error, key: "A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature_2463", message: "A binding pattern parameter cannot be optional in an implementation signature." },
+        A_computed_property_name_must_be_of_type_string_number_symbol_or_any: { code: 2464, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_must_be_of_type_string_number_symbol_or_any_2464", message: "A computed property name must be of type 'string', 'number', 'symbol', or 'any'." },
+        this_cannot_be_referenced_in_a_computed_property_name: { code: 2465, category: ts.DiagnosticCategory.Error, key: "this_cannot_be_referenced_in_a_computed_property_name_2465", message: "'this' cannot be referenced in a computed property name." },
+        super_cannot_be_referenced_in_a_computed_property_name: { code: 2466, category: ts.DiagnosticCategory.Error, key: "super_cannot_be_referenced_in_a_computed_property_name_2466", message: "'super' cannot be referenced in a computed property name." },
+        A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type: { code: 2467, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type_2467", message: "A computed property name cannot reference a type parameter from its containing type." },
+        Cannot_find_global_value_0: { code: 2468, category: ts.DiagnosticCategory.Error, key: "Cannot_find_global_value_0_2468", message: "Cannot find global value '{0}'." },
+        The_0_operator_cannot_be_applied_to_type_symbol: { code: 2469, category: ts.DiagnosticCategory.Error, key: "The_0_operator_cannot_be_applied_to_type_symbol_2469", message: "The '{0}' operator cannot be applied to type 'symbol'." },
+        Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object: { code: 2470, category: ts.DiagnosticCategory.Error, key: "Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object_2470", message: "'Symbol' reference does not refer to the global Symbol constructor object." },
+        A_computed_property_name_of_the_form_0_must_be_of_type_symbol: { code: 2471, category: ts.DiagnosticCategory.Error, key: "A_computed_property_name_of_the_form_0_must_be_of_type_symbol_2471", message: "A computed property name of the form '{0}' must be of type 'symbol'." },
+        Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher: { code: 2472, category: ts.DiagnosticCategory.Error, key: "Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher_2472", message: "Spread operator in 'new' expressions is only available when targeting ECMAScript 5 and higher." },
+        Enum_declarations_must_all_be_const_or_non_const: { code: 2473, category: ts.DiagnosticCategory.Error, key: "Enum_declarations_must_all_be_const_or_non_const_2473", message: "Enum declarations must all be const or non-const." },
+        In_const_enum_declarations_member_initializer_must_be_constant_expression: { code: 2474, category: ts.DiagnosticCategory.Error, key: "In_const_enum_declarations_member_initializer_must_be_constant_expression_2474", message: "In 'const' enum declarations member initializer must be constant expression." },
+        const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment: { code: 2475, category: ts.DiagnosticCategory.Error, key: "const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_im_2475", message: "'const' enums can only be used in property or index access expressions or the right hand side of an import declaration or export assignment." },
+        A_const_enum_member_can_only_be_accessed_using_a_string_literal: { code: 2476, category: ts.DiagnosticCategory.Error, key: "A_const_enum_member_can_only_be_accessed_using_a_string_literal_2476", message: "A const enum member can only be accessed using a string literal." },
+        const_enum_member_initializer_was_evaluated_to_a_non_finite_value: { code: 2477, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_a_non_finite_value_2477", message: "'const' enum member initializer was evaluated to a non-finite value." },
+        const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN: { code: 2478, category: ts.DiagnosticCategory.Error, key: "const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN_2478", message: "'const' enum member initializer was evaluated to disallowed value 'NaN'." },
+        Property_0_does_not_exist_on_const_enum_1: { code: 2479, category: ts.DiagnosticCategory.Error, key: "Property_0_does_not_exist_on_const_enum_1_2479", message: "Property '{0}' does not exist on 'const' enum '{1}'." },
+        let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations: { code: 2480, category: ts.DiagnosticCategory.Error, key: "let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations_2480", message: "'let' is not allowed to be used as a name in 'let' or 'const' declarations." },
+        Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1: { code: 2481, category: ts.DiagnosticCategory.Error, key: "Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1_2481", message: "Cannot initialize outer scoped variable '{0}' in the same scope as block scoped declaration '{1}'." },
+        The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation: { code: 2483, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation_2483", message: "The left-hand side of a 'for...of' statement cannot use a type annotation." },
+        Export_declaration_conflicts_with_exported_declaration_of_0: { code: 2484, category: ts.DiagnosticCategory.Error, key: "Export_declaration_conflicts_with_exported_declaration_of_0_2484", message: "Export declaration conflicts with exported declaration of '{0}'" },
+        The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2485, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property_2485", message: "The left-hand side of a 'for...of' statement cannot be a constant or a read-only property." },
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property: { code: 2486, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property_2486", message: "The left-hand side of a 'for...in' statement cannot be a constant or a read-only property." },
+        Invalid_left_hand_side_in_for_of_statement: { code: 2487, category: ts.DiagnosticCategory.Error, key: "Invalid_left_hand_side_in_for_of_statement_2487", message: "Invalid left-hand side in 'for...of' statement." },
+        Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator: { code: 2488, category: ts.DiagnosticCategory.Error, key: "Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator_2488", message: "Type must have a '[Symbol.iterator]()' method that returns an iterator." },
+        An_iterator_must_have_a_next_method: { code: 2489, category: ts.DiagnosticCategory.Error, key: "An_iterator_must_have_a_next_method_2489", message: "An iterator must have a 'next()' method." },
+        The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property: { code: 2490, category: ts.DiagnosticCategory.Error, key: "The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property_2490", message: "The type returned by the 'next()' method of an iterator must have a 'value' property." },
+        The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern: { code: 2491, category: ts.DiagnosticCategory.Error, key: "The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern_2491", message: "The left-hand side of a 'for...in' statement cannot be a destructuring pattern." },
+        Cannot_redeclare_identifier_0_in_catch_clause: { code: 2492, category: ts.DiagnosticCategory.Error, key: "Cannot_redeclare_identifier_0_in_catch_clause_2492", message: "Cannot redeclare identifier '{0}' in catch clause" },
+        Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2: { code: 2493, category: ts.DiagnosticCategory.Error, key: "Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2_2493", message: "Tuple type '{0}' with length '{1}' cannot be assigned to tuple with length '{2}'." },
+        Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher: { code: 2494, category: ts.DiagnosticCategory.Error, key: "Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher_2494", message: "Using a string in a 'for...of' statement is only supported in ECMAScript 5 and higher." },
+        Type_0_is_not_an_array_type_or_a_string_type: { code: 2495, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_an_array_type_or_a_string_type_2495", message: "Type '{0}' is not an array type or a string type." },
+        The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression: { code: 2496, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_stand_2496", message: "The 'arguments' object cannot be referenced in an arrow function in ES3 and ES5. Consider using a standard function expression." },
+        Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct: { code: 2497, category: ts.DiagnosticCategory.Error, key: "Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct_2497", message: "Module '{0}' resolves to a non-module entity and cannot be imported using this construct." },
+        Module_0_uses_export_and_cannot_be_used_with_export_Asterisk: { code: 2498, category: ts.DiagnosticCategory.Error, key: "Module_0_uses_export_and_cannot_be_used_with_export_Asterisk_2498", message: "Module '{0}' uses 'export =' and cannot be used with 'export *'." },
+        An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2499, category: ts.DiagnosticCategory.Error, key: "An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments_2499", message: "An interface can only extend an identifier/qualified-name with optional type arguments." },
+        A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments: { code: 2500, category: ts.DiagnosticCategory.Error, key: "A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments_2500", message: "A class can only implement an identifier/qualified-name with optional type arguments." },
+        A_rest_element_cannot_contain_a_binding_pattern: { code: 2501, category: ts.DiagnosticCategory.Error, key: "A_rest_element_cannot_contain_a_binding_pattern_2501", message: "A rest element cannot contain a binding pattern." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_type_annotation: { code: 2502, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_type_annotation_2502", message: "'{0}' is referenced directly or indirectly in its own type annotation." },
+        Cannot_find_namespace_0: { code: 2503, category: ts.DiagnosticCategory.Error, key: "Cannot_find_namespace_0_2503", message: "Cannot find namespace '{0}'." },
+        No_best_common_type_exists_among_yield_expressions: { code: 2504, category: ts.DiagnosticCategory.Error, key: "No_best_common_type_exists_among_yield_expressions_2504", message: "No best common type exists among yield expressions." },
+        A_generator_cannot_have_a_void_type_annotation: { code: 2505, category: ts.DiagnosticCategory.Error, key: "A_generator_cannot_have_a_void_type_annotation_2505", message: "A generator cannot have a 'void' type annotation." },
+        _0_is_referenced_directly_or_indirectly_in_its_own_base_expression: { code: 2506, category: ts.DiagnosticCategory.Error, key: "_0_is_referenced_directly_or_indirectly_in_its_own_base_expression_2506", message: "'{0}' is referenced directly or indirectly in its own base expression." },
+        Type_0_is_not_a_constructor_function_type: { code: 2507, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_a_constructor_function_type_2507", message: "Type '{0}' is not a constructor function type." },
+        No_base_constructor_has_the_specified_number_of_type_arguments: { code: 2508, category: ts.DiagnosticCategory.Error, key: "No_base_constructor_has_the_specified_number_of_type_arguments_2508", message: "No base constructor has the specified number of type arguments." },
+        Base_constructor_return_type_0_is_not_a_class_or_interface_type: { code: 2509, category: ts.DiagnosticCategory.Error, key: "Base_constructor_return_type_0_is_not_a_class_or_interface_type_2509", message: "Base constructor return type '{0}' is not a class or interface type." },
+        Base_constructors_must_all_have_the_same_return_type: { code: 2510, category: ts.DiagnosticCategory.Error, key: "Base_constructors_must_all_have_the_same_return_type_2510", message: "Base constructors must all have the same return type." },
+        Cannot_create_an_instance_of_the_abstract_class_0: { code: 2511, category: ts.DiagnosticCategory.Error, key: "Cannot_create_an_instance_of_the_abstract_class_0_2511", message: "Cannot create an instance of the abstract class '{0}'." },
+        Overload_signatures_must_all_be_abstract_or_non_abstract: { code: 2512, category: ts.DiagnosticCategory.Error, key: "Overload_signatures_must_all_be_abstract_or_non_abstract_2512", message: "Overload signatures must all be abstract or non-abstract." },
+        Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression: { code: 2513, category: ts.DiagnosticCategory.Error, key: "Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression_2513", message: "Abstract method '{0}' in class '{1}' cannot be accessed via super expression." },
+        Classes_containing_abstract_methods_must_be_marked_abstract: { code: 2514, category: ts.DiagnosticCategory.Error, key: "Classes_containing_abstract_methods_must_be_marked_abstract_2514", message: "Classes containing abstract methods must be marked abstract." },
+        Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2: { code: 2515, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2_2515", message: "Non-abstract class '{0}' does not implement inherited abstract member '{1}' from class '{2}'." },
+        All_declarations_of_an_abstract_method_must_be_consecutive: { code: 2516, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_an_abstract_method_must_be_consecutive_2516", message: "All declarations of an abstract method must be consecutive." },
+        Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type: { code: 2517, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type_2517", message: "Cannot assign an abstract constructor type to a non-abstract constructor type." },
+        A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard: { code: 2518, category: ts.DiagnosticCategory.Error, key: "A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard_2518", message: "A 'this'-based type guard is not compatible with a parameter-based type guard." },
+        Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions: { code: 2520, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions_2520", message: "Duplicate identifier '{0}'. Compiler uses declaration '{1}' to support async functions." },
+        Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions: { code: 2521, category: ts.DiagnosticCategory.Error, key: "Expression_resolves_to_variable_declaration_0_that_compiler_uses_to_support_async_functions_2521", message: "Expression resolves to variable declaration '{0}' that compiler uses to support async functions." },
+        The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_function_expression: { code: 2522, category: ts.DiagnosticCategory.Error, key: "The_arguments_object_cannot_be_referenced_in_an_async_arrow_function_Consider_using_a_standard_async_2522", message: "The 'arguments' object cannot be referenced in an async arrow function. Consider using a standard async function expression." },
+        yield_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2523, category: ts.DiagnosticCategory.Error, key: "yield_expressions_cannot_be_used_in_a_parameter_initializer_2523", message: "'yield' expressions cannot be used in a parameter initializer." },
+        await_expressions_cannot_be_used_in_a_parameter_initializer: { code: 2524, category: ts.DiagnosticCategory.Error, key: "await_expressions_cannot_be_used_in_a_parameter_initializer_2524", message: "'await' expressions cannot be used in a parameter initializer." },
+        Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value: { code: 2525, category: ts.DiagnosticCategory.Error, key: "Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value_2525", message: "Initializer provides no value for this binding element and the binding element has no default value." },
+        A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface: { code: 2526, category: ts.DiagnosticCategory.Error, key: "A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface_2526", message: "A 'this' type is available only in a non-static member of a class or interface." },
+        The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary: { code: 2527, category: ts.DiagnosticCategory.Error, key: "The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary_2527", message: "The inferred type of '{0}' references an inaccessible 'this' type. A type annotation is necessary." },
+        A_module_cannot_have_multiple_default_exports: { code: 2528, category: ts.DiagnosticCategory.Error, key: "A_module_cannot_have_multiple_default_exports_2528", message: "A module cannot have multiple default exports." },
+        Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions: { code: 2529, category: ts.DiagnosticCategory.Error, key: "Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_func_2529", message: "Duplicate identifier '{0}'. Compiler reserves name '{1}' in top level scope of a module containing async functions." },
+        Property_0_is_incompatible_with_index_signature: { code: 2530, category: ts.DiagnosticCategory.Error, key: "Property_0_is_incompatible_with_index_signature_2530", message: "Property '{0}' is incompatible with index signature." },
+        Object_is_possibly_null: { code: 2531, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_2531", message: "Object is possibly 'null'." },
+        Object_is_possibly_undefined: { code: 2532, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_undefined_2532", message: "Object is possibly 'undefined'." },
+        Object_is_possibly_null_or_undefined: { code: 2533, category: ts.DiagnosticCategory.Error, key: "Object_is_possibly_null_or_undefined_2533", message: "Object is possibly 'null' or 'undefined'." },
+        A_function_returning_never_cannot_have_a_reachable_end_point: { code: 2534, category: ts.DiagnosticCategory.Error, key: "A_function_returning_never_cannot_have_a_reachable_end_point_2534", message: "A function returning 'never' cannot have a reachable end point." },
+        JSX_element_attributes_type_0_may_not_be_a_union_type: { code: 2600, category: ts.DiagnosticCategory.Error, key: "JSX_element_attributes_type_0_may_not_be_a_union_type_2600", message: "JSX element attributes type '{0}' may not be a union type." },
+        The_return_type_of_a_JSX_element_constructor_must_return_an_object_type: { code: 2601, category: ts.DiagnosticCategory.Error, key: "The_return_type_of_a_JSX_element_constructor_must_return_an_object_type_2601", message: "The return type of a JSX element constructor must return an object type." },
+        JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist: { code: 2602, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist_2602", message: "JSX element implicitly has type 'any' because the global type 'JSX.Element' does not exist." },
+        Property_0_in_type_1_is_not_assignable_to_type_2: { code: 2603, category: ts.DiagnosticCategory.Error, key: "Property_0_in_type_1_is_not_assignable_to_type_2_2603", message: "Property '{0}' in type '{1}' is not assignable to type '{2}'" },
+        JSX_element_type_0_does_not_have_any_construct_or_call_signatures: { code: 2604, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_does_not_have_any_construct_or_call_signatures_2604", message: "JSX element type '{0}' does not have any construct or call signatures." },
+        JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements: { code: 2605, category: ts.DiagnosticCategory.Error, key: "JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements_2605", message: "JSX element type '{0}' is not a constructor function for JSX elements." },
+        Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property: { code: 2606, category: ts.DiagnosticCategory.Error, key: "Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property_2606", message: "Property '{0}' of JSX spread attribute is not assignable to target property." },
+        JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property: { code: 2607, category: ts.DiagnosticCategory.Error, key: "JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property_2607", message: "JSX element class does not support attributes because it does not have a '{0}' property" },
+        The_global_type_JSX_0_may_not_have_more_than_one_property: { code: 2608, category: ts.DiagnosticCategory.Error, key: "The_global_type_JSX_0_may_not_have_more_than_one_property_2608", message: "The global type 'JSX.{0}' may not have more than one property" },
+        Cannot_emit_namespaced_JSX_elements_in_React: { code: 2650, category: ts.DiagnosticCategory.Error, key: "Cannot_emit_namespaced_JSX_elements_in_React_2650", message: "Cannot emit namespaced JSX elements in React" },
+        A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums: { code: 2651, category: ts.DiagnosticCategory.Error, key: "A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_memb_2651", message: "A member initializer in a enum declaration cannot reference members declared after it, including members defined in other enums." },
+        Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead: { code: 2652, category: ts.DiagnosticCategory.Error, key: "Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_d_2652", message: "Merged declaration '{0}' cannot include a default export declaration. Consider adding a separate 'export default {0}' declaration instead." },
+        Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1: { code: 2653, category: ts.DiagnosticCategory.Error, key: "Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1_2653", message: "Non-abstract class expression does not implement inherited abstract member '{0}' from class '{1}'." },
+        Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_package_author_to_update_the_package_definition: { code: 2654, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_cannot_contain_tripleslash_references_Please_contact_the_pack_2654", message: "Exported external package typings file cannot contain tripleslash references. Please contact the package author to update the package definition." },
+        Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_the_package_definition: { code: 2656, category: ts.DiagnosticCategory.Error, key: "Exported_external_package_typings_file_0_is_not_a_module_Please_contact_the_package_author_to_update_2656", message: "Exported external package typings file '{0}' is not a module. Please contact the package author to update the package definition." },
+        JSX_expressions_must_have_one_parent_element: { code: 2657, category: ts.DiagnosticCategory.Error, key: "JSX_expressions_must_have_one_parent_element_2657", message: "JSX expressions must have one parent element" },
+        Type_0_provides_no_match_for_the_signature_1: { code: 2658, category: ts.DiagnosticCategory.Error, key: "Type_0_provides_no_match_for_the_signature_1_2658", message: "Type '{0}' provides no match for the signature '{1}'" },
+        super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher: { code: 2659, category: ts.DiagnosticCategory.Error, key: "super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_highe_2659", message: "'super' is only allowed in members of object literal expressions when option 'target' is 'ES2015' or higher." },
+        super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions: { code: 2660, category: ts.DiagnosticCategory.Error, key: "super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions_2660", message: "'super' can only be referenced in members of derived classes or object literal expressions." },
+        Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module: { code: 2661, category: ts.DiagnosticCategory.Error, key: "Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module_2661", message: "Cannot export '{0}'. Only local declarations can be exported from a module." },
+        Cannot_find_name_0_Did_you_mean_the_static_member_1_0: { code: 2662, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_static_member_1_0_2662", message: "Cannot find name '{0}'. Did you mean the static member '{1}.{0}'?" },
+        Cannot_find_name_0_Did_you_mean_the_instance_member_this_0: { code: 2663, category: ts.DiagnosticCategory.Error, key: "Cannot_find_name_0_Did_you_mean_the_instance_member_this_0_2663", message: "Cannot find name '{0}'. Did you mean the instance member 'this.{0}'?" },
+        Invalid_module_name_in_augmentation_module_0_cannot_be_found: { code: 2664, category: ts.DiagnosticCategory.Error, key: "Invalid_module_name_in_augmentation_module_0_cannot_be_found_2664", message: "Invalid module name in augmentation, module '{0}' cannot be found." },
+        Exports_and_export_assignments_are_not_permitted_in_module_augmentations: { code: 2666, category: ts.DiagnosticCategory.Error, key: "Exports_and_export_assignments_are_not_permitted_in_module_augmentations_2666", message: "Exports and export assignments are not permitted in module augmentations." },
+        Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module: { code: 2667, category: ts.DiagnosticCategory.Error, key: "Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_mod_2667", message: "Imports are not permitted in module augmentations. Consider moving them to the enclosing external module." },
+        export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible: { code: 2668, category: ts.DiagnosticCategory.Error, key: "export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always__2668", message: "'export' modifier cannot be applied to ambient modules and module augmentations since they are always visible." },
+        Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations: { code: 2669, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_2669", message: "Augmentations for the global scope can only be directly nested in external modules or ambient module declarations." },
+        Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context: { code: 2670, category: ts.DiagnosticCategory.Error, key: "Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambien_2670", message: "Augmentations for the global scope should have 'declare' modifier unless they appear in already ambient context." },
+        Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity: { code: 2671, category: ts.DiagnosticCategory.Error, key: "Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity_2671", message: "Cannot augment module '{0}' because it resolves to a non-module entity." },
+        Cannot_assign_a_0_constructor_type_to_a_1_constructor_type: { code: 2672, category: ts.DiagnosticCategory.Error, key: "Cannot_assign_a_0_constructor_type_to_a_1_constructor_type_2672", message: "Cannot assign a '{0}' constructor type to a '{1}' constructor type." },
+        Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration: { code: 2673, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration_2673", message: "Constructor of class '{0}' is private and only accessible within the class declaration." },
+        Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration: { code: 2674, category: ts.DiagnosticCategory.Error, key: "Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration_2674", message: "Constructor of class '{0}' is protected and only accessible within the class declaration." },
+        Cannot_extend_a_class_0_Class_constructor_is_marked_as_private: { code: 2675, category: ts.DiagnosticCategory.Error, key: "Cannot_extend_a_class_0_Class_constructor_is_marked_as_private_2675", message: "Cannot extend a class '{0}'. Class constructor is marked as private." },
+        Accessors_must_both_be_abstract_or_non_abstract: { code: 2676, category: ts.DiagnosticCategory.Error, key: "Accessors_must_both_be_abstract_or_non_abstract_2676", message: "Accessors must both be abstract or non-abstract." },
+        A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type: { code: 2677, category: ts.DiagnosticCategory.Error, key: "A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type_2677", message: "A type predicate's type must be assignable to its parameter's type." },
+        Type_0_is_not_comparable_to_type_1: { code: 2678, category: ts.DiagnosticCategory.Error, key: "Type_0_is_not_comparable_to_type_1_2678", message: "Type '{0}' is not comparable to type '{1}'." },
+        A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void: { code: 2679, category: ts.DiagnosticCategory.Error, key: "A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void_2679", message: "A function that is called with the 'new' keyword cannot have a 'this' type that is 'void'." },
+        A_this_parameter_must_be_the_first_parameter: { code: 2680, category: ts.DiagnosticCategory.Error, key: "A_this_parameter_must_be_the_first_parameter_2680", message: "A 'this' parameter must be the first parameter." },
+        A_constructor_cannot_have_a_this_parameter: { code: 2681, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_have_a_this_parameter_2681", message: "A constructor cannot have a 'this' parameter." },
+        get_and_set_accessor_must_have_the_same_this_type: { code: 2682, category: ts.DiagnosticCategory.Error, key: "get_and_set_accessor_must_have_the_same_this_type_2682", message: "'get' and 'set' accessor must have the same 'this' type." },
+        this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation: { code: 2683, category: ts.DiagnosticCategory.Error, key: "this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_2683", message: "'this' implicitly has type 'any' because it does not have a type annotation." },
+        The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1: { code: 2684, category: ts.DiagnosticCategory.Error, key: "The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1_2684", message: "The 'this' context of type '{0}' is not assignable to method's 'this' of type '{1}'." },
+        The_this_types_of_each_signature_are_incompatible: { code: 2685, category: ts.DiagnosticCategory.Error, key: "The_this_types_of_each_signature_are_incompatible_2685", message: "The 'this' types of each signature are incompatible." },
+        Identifier_0_must_be_imported_from_a_module: { code: 2686, category: ts.DiagnosticCategory.Error, key: "Identifier_0_must_be_imported_from_a_module_2686", message: "Identifier '{0}' must be imported from a module" },
+        All_declarations_of_0_must_have_identical_modifiers: { code: 2687, category: ts.DiagnosticCategory.Error, key: "All_declarations_of_0_must_have_identical_modifiers_2687", message: "All declarations of '{0}' must have identical modifiers." },
+        Import_declaration_0_is_using_private_name_1: { code: 4000, category: ts.DiagnosticCategory.Error, key: "Import_declaration_0_is_using_private_name_1_4000", message: "Import declaration '{0}' is using private name '{1}'." },
+        Type_parameter_0_of_exported_class_has_or_is_using_private_name_1: { code: 4002, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_class_has_or_is_using_private_name_1_4002", message: "Type parameter '{0}' of exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4004, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1_4004", message: "Type parameter '{0}' of exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4006, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4006", message: "Type parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4008, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4008", message: "Type parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4010, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4010", message: "Type parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4012, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4012", message: "Type parameter '{0}' of public method from exported class has or is using private name '{1}'." },
+        Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4014, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4014", message: "Type parameter '{0}' of method from exported interface has or is using private name '{1}'." },
+        Type_parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4016, category: ts.DiagnosticCategory.Error, key: "Type_parameter_0_of_exported_function_has_or_is_using_private_name_1_4016", message: "Type parameter '{0}' of exported function has or is using private name '{1}'." },
+        Implements_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4019, category: ts.DiagnosticCategory.Error, key: "Implements_clause_of_exported_class_0_has_or_is_using_private_name_1_4019", message: "Implements clause of exported class '{0}' has or is using private name '{1}'." },
+        Extends_clause_of_exported_class_0_has_or_is_using_private_name_1: { code: 4020, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_class_0_has_or_is_using_private_name_1_4020", message: "Extends clause of exported class '{0}' has or is using private name '{1}'." },
+        Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1: { code: 4022, category: ts.DiagnosticCategory.Error, key: "Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1_4022", message: "Extends clause of exported interface '{0}' has or is using private name '{1}'." },
+        Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4023, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4023", message: "Exported variable '{0}' has or is using name '{1}' from external module {2} but cannot be named." },
+        Exported_variable_0_has_or_is_using_name_1_from_private_module_2: { code: 4024, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_name_1_from_private_module_2_4024", message: "Exported variable '{0}' has or is using name '{1}' from private module '{2}'." },
+        Exported_variable_0_has_or_is_using_private_name_1: { code: 4025, category: ts.DiagnosticCategory.Error, key: "Exported_variable_0_has_or_is_using_private_name_1_4025", message: "Exported variable '{0}' has or is using private name '{1}'." },
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4026, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot__4026", message: "Public static property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4027, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4027", message: "Public static property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
+        Public_static_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4028, category: ts.DiagnosticCategory.Error, key: "Public_static_property_0_of_exported_class_has_or_is_using_private_name_1_4028", message: "Public static property '{0}' of exported class has or is using private name '{1}'." },
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4029, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_name_4029", message: "Public property '{0}' of exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4030, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2_4030", message: "Public property '{0}' of exported class has or is using name '{1}' from private module '{2}'." },
+        Public_property_0_of_exported_class_has_or_is_using_private_name_1: { code: 4031, category: ts.DiagnosticCategory.Error, key: "Public_property_0_of_exported_class_has_or_is_using_private_name_1_4031", message: "Public property '{0}' of exported class has or is using private name '{1}'." },
+        Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4032, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2_4032", message: "Property '{0}' of exported interface has or is using name '{1}' from private module '{2}'." },
+        Property_0_of_exported_interface_has_or_is_using_private_name_1: { code: 4033, category: ts.DiagnosticCategory.Error, key: "Property_0_of_exported_interface_has_or_is_using_private_name_1_4033", message: "Property '{0}' of exported interface has or is using private name '{1}'." },
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4034, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_4034", message: "Parameter '{0}' of public static property setter from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4035, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1_4035", message: "Parameter '{0}' of public static property setter from exported class has or is using private name '{1}'." },
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4036, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_4036", message: "Parameter '{0}' of public property setter from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1: { code: 4037, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1_4037", message: "Parameter '{0}' of public property setter from exported class has or is using private name '{1}'." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4038, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_externa_4038", message: "Return type of public static property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4039, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_4039", message: "Return type of public static property getter from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4040, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0_4040", message: "Return type of public static property getter from exported class has or is using private name '{0}'." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4041, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_modul_4041", message: "Return type of public property getter from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4042, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_4042", message: "Return type of public property getter from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0: { code: 4043, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0_4043", message: "Return type of public property getter from exported class has or is using private name '{0}'." },
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4044, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_mod_4044", message: "Return type of constructor signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4045, category: ts.DiagnosticCategory.Error, key: "Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0_4045", message: "Return type of constructor signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4046, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4046", message: "Return type of call signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4047, category: ts.DiagnosticCategory.Error, key: "Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0_4047", message: "Return type of call signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4048, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4048", message: "Return type of index signature from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0: { code: 4049, category: ts.DiagnosticCategory.Error, key: "Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0_4049", message: "Return type of index signature from exported interface has or is using private name '{0}'." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4050, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module__4050", message: "Return type of public static method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4051, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4051", message: "Return type of public static method from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0: { code: 4052, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0_4052", message: "Return type of public static method from exported class has or is using private name '{0}'." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4053, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_c_4053", message: "Return type of public method from exported class has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1: { code: 4054, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1_4054", message: "Return type of public method from exported class has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0: { code: 4055, category: ts.DiagnosticCategory.Error, key: "Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0_4055", message: "Return type of public method from exported class has or is using private name '{0}'." },
+        Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1: { code: 4056, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1_4056", message: "Return type of method from exported interface has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0: { code: 4057, category: ts.DiagnosticCategory.Error, key: "Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0_4057", message: "Return type of method from exported interface has or is using private name '{0}'." },
+        Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named: { code: 4058, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named_4058", message: "Return type of exported function has or is using name '{0}' from external module {1} but cannot be named." },
+        Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1: { code: 4059, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1_4059", message: "Return type of exported function has or is using name '{0}' from private module '{1}'." },
+        Return_type_of_exported_function_has_or_is_using_private_name_0: { code: 4060, category: ts.DiagnosticCategory.Error, key: "Return_type_of_exported_function_has_or_is_using_private_name_0_4060", message: "Return type of exported function has or is using private name '{0}'." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4061, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_can_4061", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4062, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2_4062", message: "Parameter '{0}' of constructor from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1: { code: 4063, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1_4063", message: "Parameter '{0}' of constructor from exported class has or is using private name '{1}'." },
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4064, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_mod_4064", message: "Parameter '{0}' of constructor signature from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4065, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1_4065", message: "Parameter '{0}' of constructor signature from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4066, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4066", message: "Parameter '{0}' of call signature from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1: { code: 4067, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1_4067", message: "Parameter '{0}' of call signature from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4068, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module__4068", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4069, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4069", message: "Parameter '{0}' of public static method from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1: { code: 4070, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1_4070", message: "Parameter '{0}' of public static method from exported class has or is using private name '{1}'." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4071, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_c_4071", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2: { code: 4072, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2_4072", message: "Parameter '{0}' of public method from exported class has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1: { code: 4073, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1_4073", message: "Parameter '{0}' of public method from exported class has or is using private name '{1}'." },
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2: { code: 4074, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2_4074", message: "Parameter '{0}' of method from exported interface has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1: { code: 4075, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1_4075", message: "Parameter '{0}' of method from exported interface has or is using private name '{1}'." },
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named: { code: 4076, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named_4076", message: "Parameter '{0}' of exported function has or is using name '{1}' from external module {2} but cannot be named." },
+        Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2: { code: 4077, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2_4077", message: "Parameter '{0}' of exported function has or is using name '{1}' from private module '{2}'." },
+        Parameter_0_of_exported_function_has_or_is_using_private_name_1: { code: 4078, category: ts.DiagnosticCategory.Error, key: "Parameter_0_of_exported_function_has_or_is_using_private_name_1_4078", message: "Parameter '{0}' of exported function has or is using private name '{1}'." },
+        Exported_type_alias_0_has_or_is_using_private_name_1: { code: 4081, category: ts.DiagnosticCategory.Error, key: "Exported_type_alias_0_has_or_is_using_private_name_1_4081", message: "Exported type alias '{0}' has or is using private name '{1}'." },
+        Default_export_of_the_module_has_or_is_using_private_name_0: { code: 4082, category: ts.DiagnosticCategory.Error, key: "Default_export_of_the_module_has_or_is_using_private_name_0_4082", message: "Default export of the module has or is using private name '{0}'." },
+        Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict: { code: 4090, category: ts.DiagnosticCategory.Message, key: "Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_t_4090", message: "Conflicting library definitions for '{0}' found at '{1}' and '{2}'. Copy the correct file to the 'typings' folder to resolve this conflict." },
+        The_current_host_does_not_support_the_0_option: { code: 5001, category: ts.DiagnosticCategory.Error, key: "The_current_host_does_not_support_the_0_option_5001", message: "The current host does not support the '{0}' option." },
+        Cannot_find_the_common_subdirectory_path_for_the_input_files: { code: 5009, category: ts.DiagnosticCategory.Error, key: "Cannot_find_the_common_subdirectory_path_for_the_input_files_5009", message: "Cannot find the common subdirectory path for the input files." },
+        Cannot_read_file_0_Colon_1: { code: 5012, category: ts.DiagnosticCategory.Error, key: "Cannot_read_file_0_Colon_1_5012", message: "Cannot read file '{0}': {1}" },
+        Unsupported_file_encoding: { code: 5013, category: ts.DiagnosticCategory.Error, key: "Unsupported_file_encoding_5013", message: "Unsupported file encoding." },
+        Failed_to_parse_file_0_Colon_1: { code: 5014, category: ts.DiagnosticCategory.Error, key: "Failed_to_parse_file_0_Colon_1_5014", message: "Failed to parse file '{0}': {1}." },
+        Unknown_compiler_option_0: { code: 5023, category: ts.DiagnosticCategory.Error, key: "Unknown_compiler_option_0_5023", message: "Unknown compiler option '{0}'." },
+        Compiler_option_0_requires_a_value_of_type_1: { code: 5024, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_requires_a_value_of_type_1_5024", message: "Compiler option '{0}' requires a value of type {1}." },
+        Could_not_write_file_0_Colon_1: { code: 5033, category: ts.DiagnosticCategory.Error, key: "Could_not_write_file_0_Colon_1_5033", message: "Could not write file '{0}': {1}" },
+        Option_project_cannot_be_mixed_with_source_files_on_a_command_line: { code: 5042, category: ts.DiagnosticCategory.Error, key: "Option_project_cannot_be_mixed_with_source_files_on_a_command_line_5042", message: "Option 'project' cannot be mixed with source files on a command line." },
+        Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher: { code: 5047, category: ts.DiagnosticCategory.Error, key: "Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES_5047", message: "Option 'isolatedModules' can only be used when either option '--module' is provided or option 'target' is 'ES2015' or higher." },
+        Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided: { code: 5051, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided_5051", message: "Option '{0} can only be used when either option '--inlineSourceMap' or option '--sourceMap' is provided." },
+        Option_0_cannot_be_specified_without_specifying_option_1: { code: 5052, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_without_specifying_option_1_5052", message: "Option '{0}' cannot be specified without specifying option '{1}'." },
+        Option_0_cannot_be_specified_with_option_1: { code: 5053, category: ts.DiagnosticCategory.Error, key: "Option_0_cannot_be_specified_with_option_1_5053", message: "Option '{0}' cannot be specified with option '{1}'." },
+        A_tsconfig_json_file_is_already_defined_at_Colon_0: { code: 5054, category: ts.DiagnosticCategory.Error, key: "A_tsconfig_json_file_is_already_defined_at_Colon_0_5054", message: "A 'tsconfig.json' file is already defined at: '{0}'." },
+        Cannot_write_file_0_because_it_would_overwrite_input_file: { code: 5055, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_overwrite_input_file_5055", message: "Cannot write file '{0}' because it would overwrite input file." },
+        Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files: { code: 5056, category: ts.DiagnosticCategory.Error, key: "Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files_5056", message: "Cannot write file '{0}' because it would be overwritten by multiple input files." },
+        Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0: { code: 5057, category: ts.DiagnosticCategory.Error, key: "Cannot_find_a_tsconfig_json_file_at_the_specified_directory_Colon_0_5057", message: "Cannot find a tsconfig.json file at the specified directory: '{0}'" },
+        The_specified_path_does_not_exist_Colon_0: { code: 5058, category: ts.DiagnosticCategory.Error, key: "The_specified_path_does_not_exist_Colon_0_5058", message: "The specified path does not exist: '{0}'" },
+        Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier: { code: 5059, category: ts.DiagnosticCategory.Error, key: "Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier_5059", message: "Invalid value for '--reactNamespace'. '{0}' is not a valid identifier." },
+        Option_paths_cannot_be_used_without_specifying_baseUrl_option: { code: 5060, category: ts.DiagnosticCategory.Error, key: "Option_paths_cannot_be_used_without_specifying_baseUrl_option_5060", message: "Option 'paths' cannot be used without specifying '--baseUrl' option." },
+        Pattern_0_can_have_at_most_one_Asterisk_character: { code: 5061, category: ts.DiagnosticCategory.Error, key: "Pattern_0_can_have_at_most_one_Asterisk_character_5061", message: "Pattern '{0}' can have at most one '*' character" },
+        Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character: { code: 5062, category: ts.DiagnosticCategory.Error, key: "Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character_5062", message: "Substitution '{0}' in pattern '{1}' in can have at most one '*' character" },
+        Substitutions_for_pattern_0_should_be_an_array: { code: 5063, category: ts.DiagnosticCategory.Error, key: "Substitutions_for_pattern_0_should_be_an_array_5063", message: "Substitutions for pattern '{0}' should be an array." },
+        Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2: { code: 5064, category: ts.DiagnosticCategory.Error, key: "Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2_5064", message: "Substitution '{0}' for pattern '{1}' has incorrect type, expected 'string', got '{2}'." },
+        Concatenate_and_emit_output_to_single_file: { code: 6001, category: ts.DiagnosticCategory.Message, key: "Concatenate_and_emit_output_to_single_file_6001", message: "Concatenate and emit output to single file." },
+        Generates_corresponding_d_ts_file: { code: 6002, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_d_ts_file_6002", message: "Generates corresponding '.d.ts' file." },
+        Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations: { code: 6003, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations_6003", message: "Specify the location where debugger should locate map files instead of generated locations." },
+        Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations: { code: 6004, category: ts.DiagnosticCategory.Message, key: "Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations_6004", message: "Specify the location where debugger should locate TypeScript files instead of source locations." },
+        Watch_input_files: { code: 6005, category: ts.DiagnosticCategory.Message, key: "Watch_input_files_6005", message: "Watch input files." },
+        Redirect_output_structure_to_the_directory: { code: 6006, category: ts.DiagnosticCategory.Message, key: "Redirect_output_structure_to_the_directory_6006", message: "Redirect output structure to the directory." },
+        Do_not_erase_const_enum_declarations_in_generated_code: { code: 6007, category: ts.DiagnosticCategory.Message, key: "Do_not_erase_const_enum_declarations_in_generated_code_6007", message: "Do not erase const enum declarations in generated code." },
+        Do_not_emit_outputs_if_any_errors_were_reported: { code: 6008, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_if_any_errors_were_reported_6008", message: "Do not emit outputs if any errors were reported." },
+        Do_not_emit_comments_to_output: { code: 6009, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_comments_to_output_6009", message: "Do not emit comments to output." },
+        Do_not_emit_outputs: { code: 6010, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_outputs_6010", message: "Do not emit outputs." },
+        Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking: { code: 6011, category: ts.DiagnosticCategory.Message, key: "Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typech_6011", message: "Allow default imports from modules with no default export. This does not affect code emit, just typechecking." },
+        Skip_type_checking_of_declaration_files: { code: 6012, category: ts.DiagnosticCategory.Message, key: "Skip_type_checking_of_declaration_files_6012", message: "Skip type checking of declaration files." },
+        Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015: { code: 6015, category: ts.DiagnosticCategory.Message, key: "Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015_6015", message: "Specify ECMAScript target version: 'ES3' (default), 'ES5', or 'ES2015'" },
+        Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015: { code: 6016, category: ts.DiagnosticCategory.Message, key: "Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015_6016", message: "Specify module code generation: 'commonjs', 'amd', 'system', 'umd' or 'es2015'" },
+        Print_this_message: { code: 6017, category: ts.DiagnosticCategory.Message, key: "Print_this_message_6017", message: "Print this message." },
+        Print_the_compiler_s_version: { code: 6019, category: ts.DiagnosticCategory.Message, key: "Print_the_compiler_s_version_6019", message: "Print the compiler's version." },
+        Compile_the_project_in_the_given_directory: { code: 6020, category: ts.DiagnosticCategory.Message, key: "Compile_the_project_in_the_given_directory_6020", message: "Compile the project in the given directory." },
+        Syntax_Colon_0: { code: 6023, category: ts.DiagnosticCategory.Message, key: "Syntax_Colon_0_6023", message: "Syntax: {0}" },
+        options: { code: 6024, category: ts.DiagnosticCategory.Message, key: "options_6024", message: "options" },
+        file: { code: 6025, category: ts.DiagnosticCategory.Message, key: "file_6025", message: "file" },
+        Examples_Colon_0: { code: 6026, category: ts.DiagnosticCategory.Message, key: "Examples_Colon_0_6026", message: "Examples: {0}" },
+        Options_Colon: { code: 6027, category: ts.DiagnosticCategory.Message, key: "Options_Colon_6027", message: "Options:" },
+        Version_0: { code: 6029, category: ts.DiagnosticCategory.Message, key: "Version_0_6029", message: "Version {0}" },
+        Insert_command_line_options_and_files_from_a_file: { code: 6030, category: ts.DiagnosticCategory.Message, key: "Insert_command_line_options_and_files_from_a_file_6030", message: "Insert command line options and files from a file." },
+        File_change_detected_Starting_incremental_compilation: { code: 6032, category: ts.DiagnosticCategory.Message, key: "File_change_detected_Starting_incremental_compilation_6032", message: "File change detected. Starting incremental compilation..." },
+        KIND: { code: 6034, category: ts.DiagnosticCategory.Message, key: "KIND_6034", message: "KIND" },
+        FILE: { code: 6035, category: ts.DiagnosticCategory.Message, key: "FILE_6035", message: "FILE" },
+        VERSION: { code: 6036, category: ts.DiagnosticCategory.Message, key: "VERSION_6036", message: "VERSION" },
+        LOCATION: { code: 6037, category: ts.DiagnosticCategory.Message, key: "LOCATION_6037", message: "LOCATION" },
+        DIRECTORY: { code: 6038, category: ts.DiagnosticCategory.Message, key: "DIRECTORY_6038", message: "DIRECTORY" },
+        Compilation_complete_Watching_for_file_changes: { code: 6042, category: ts.DiagnosticCategory.Message, key: "Compilation_complete_Watching_for_file_changes_6042", message: "Compilation complete. Watching for file changes." },
+        Generates_corresponding_map_file: { code: 6043, category: ts.DiagnosticCategory.Message, key: "Generates_corresponding_map_file_6043", message: "Generates corresponding '.map' file." },
+        Compiler_option_0_expects_an_argument: { code: 6044, category: ts.DiagnosticCategory.Error, key: "Compiler_option_0_expects_an_argument_6044", message: "Compiler option '{0}' expects an argument." },
+        Unterminated_quoted_string_in_response_file_0: { code: 6045, category: ts.DiagnosticCategory.Error, key: "Unterminated_quoted_string_in_response_file_0_6045", message: "Unterminated quoted string in response file '{0}'." },
+        Argument_for_0_option_must_be_Colon_1: { code: 6046, category: ts.DiagnosticCategory.Error, key: "Argument_for_0_option_must_be_Colon_1_6046", message: "Argument for '{0}' option must be: {1}" },
+        Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1: { code: 6048, category: ts.DiagnosticCategory.Error, key: "Locale_must_be_of_the_form_language_or_language_territory_For_example_0_or_1_6048", message: "Locale must be of the form <language> or <language>-<territory>. For example '{0}' or '{1}'." },
+        Unsupported_locale_0: { code: 6049, category: ts.DiagnosticCategory.Error, key: "Unsupported_locale_0_6049", message: "Unsupported locale '{0}'." },
+        Unable_to_open_file_0: { code: 6050, category: ts.DiagnosticCategory.Error, key: "Unable_to_open_file_0_6050", message: "Unable to open file '{0}'." },
+        Corrupted_locale_file_0: { code: 6051, category: ts.DiagnosticCategory.Error, key: "Corrupted_locale_file_0_6051", message: "Corrupted locale file {0}." },
+        Raise_error_on_expressions_and_declarations_with_an_implied_any_type: { code: 6052, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_expressions_and_declarations_with_an_implied_any_type_6052", message: "Raise error on expressions and declarations with an implied 'any' type." },
+        File_0_not_found: { code: 6053, category: ts.DiagnosticCategory.Error, key: "File_0_not_found_6053", message: "File '{0}' not found." },
+        File_0_has_unsupported_extension_The_only_supported_extensions_are_1: { code: 6054, category: ts.DiagnosticCategory.Error, key: "File_0_has_unsupported_extension_The_only_supported_extensions_are_1_6054", message: "File '{0}' has unsupported extension. The only supported extensions are {1}." },
+        Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures: { code: 6055, category: ts.DiagnosticCategory.Message, key: "Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures_6055", message: "Suppress noImplicitAny errors for indexing objects lacking index signatures." },
+        Do_not_emit_declarations_for_code_that_has_an_internal_annotation: { code: 6056, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_declarations_for_code_that_has_an_internal_annotation_6056", message: "Do not emit declarations for code that has an '@internal' annotation." },
+        Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir: { code: 6058, category: ts.DiagnosticCategory.Message, key: "Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir_6058", message: "Specify the root directory of input files. Use to control the output directory structure with --outDir." },
+        File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files: { code: 6059, category: ts.DiagnosticCategory.Error, key: "File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files_6059", message: "File '{0}' is not under 'rootDir' '{1}'. 'rootDir' is expected to contain all source files." },
+        Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix: { code: 6060, category: ts.DiagnosticCategory.Message, key: "Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix_6060", message: "Specify the end of line sequence to be used when emitting files: 'CRLF' (dos) or 'LF' (unix)." },
+        NEWLINE: { code: 6061, category: ts.DiagnosticCategory.Message, key: "NEWLINE_6061", message: "NEWLINE" },
+        Option_0_can_only_be_specified_in_tsconfig_json_file: { code: 6064, category: ts.DiagnosticCategory.Error, key: "Option_0_can_only_be_specified_in_tsconfig_json_file_6064", message: "Option '{0}' can only be specified in 'tsconfig.json' file." },
+        Enables_experimental_support_for_ES7_decorators: { code: 6065, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_decorators_6065", message: "Enables experimental support for ES7 decorators." },
+        Enables_experimental_support_for_emitting_type_metadata_for_decorators: { code: 6066, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_emitting_type_metadata_for_decorators_6066", message: "Enables experimental support for emitting type metadata for decorators." },
+        Enables_experimental_support_for_ES7_async_functions: { code: 6068, category: ts.DiagnosticCategory.Message, key: "Enables_experimental_support_for_ES7_async_functions_6068", message: "Enables experimental support for ES7 async functions." },
+        Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6: { code: 6069, category: ts.DiagnosticCategory.Message, key: "Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6_6069", message: "Specify module resolution strategy: 'node' (Node.js) or 'classic' (TypeScript pre-1.6)." },
+        Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file: { code: 6070, category: ts.DiagnosticCategory.Message, key: "Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file_6070", message: "Initializes a TypeScript project and creates a tsconfig.json file." },
+        Successfully_created_a_tsconfig_json_file: { code: 6071, category: ts.DiagnosticCategory.Message, key: "Successfully_created_a_tsconfig_json_file_6071", message: "Successfully created a tsconfig.json file." },
+        Suppress_excess_property_checks_for_object_literals: { code: 6072, category: ts.DiagnosticCategory.Message, key: "Suppress_excess_property_checks_for_object_literals_6072", message: "Suppress excess property checks for object literals." },
+        Stylize_errors_and_messages_using_color_and_context_experimental: { code: 6073, category: ts.DiagnosticCategory.Message, key: "Stylize_errors_and_messages_using_color_and_context_experimental_6073", message: "Stylize errors and messages using color and context. (experimental)" },
+        Do_not_report_errors_on_unused_labels: { code: 6074, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unused_labels_6074", message: "Do not report errors on unused labels." },
+        Report_error_when_not_all_code_paths_in_function_return_a_value: { code: 6075, category: ts.DiagnosticCategory.Message, key: "Report_error_when_not_all_code_paths_in_function_return_a_value_6075", message: "Report error when not all code paths in function return a value." },
+        Report_errors_for_fallthrough_cases_in_switch_statement: { code: 6076, category: ts.DiagnosticCategory.Message, key: "Report_errors_for_fallthrough_cases_in_switch_statement_6076", message: "Report errors for fallthrough cases in switch statement." },
+        Do_not_report_errors_on_unreachable_code: { code: 6077, category: ts.DiagnosticCategory.Message, key: "Do_not_report_errors_on_unreachable_code_6077", message: "Do not report errors on unreachable code." },
+        Disallow_inconsistently_cased_references_to_the_same_file: { code: 6078, category: ts.DiagnosticCategory.Message, key: "Disallow_inconsistently_cased_references_to_the_same_file_6078", message: "Disallow inconsistently-cased references to the same file." },
+        Specify_library_files_to_be_included_in_the_compilation_Colon: { code: 6079, category: ts.DiagnosticCategory.Message, key: "Specify_library_files_to_be_included_in_the_compilation_Colon_6079", message: "Specify library files to be included in the compilation: " },
+        Specify_JSX_code_generation_Colon_preserve_or_react: { code: 6080, category: ts.DiagnosticCategory.Message, key: "Specify_JSX_code_generation_Colon_preserve_or_react_6080", message: "Specify JSX code generation: 'preserve' or 'react'" },
+        Only_amd_and_system_modules_are_supported_alongside_0: { code: 6082, category: ts.DiagnosticCategory.Error, key: "Only_amd_and_system_modules_are_supported_alongside_0_6082", message: "Only 'amd' and 'system' modules are supported alongside --{0}." },
+        Base_directory_to_resolve_non_absolute_module_names: { code: 6083, category: ts.DiagnosticCategory.Message, key: "Base_directory_to_resolve_non_absolute_module_names_6083", message: "Base directory to resolve non-absolute module names." },
+        Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit: { code: 6084, category: ts.DiagnosticCategory.Message, key: "Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit_6084", message: "Specify the object invoked for createElement and __spread when targeting 'react' JSX emit" },
+        Enable_tracing_of_the_name_resolution_process: { code: 6085, category: ts.DiagnosticCategory.Message, key: "Enable_tracing_of_the_name_resolution_process_6085", message: "Enable tracing of the name resolution process." },
+        Resolving_module_0_from_1: { code: 6086, category: ts.DiagnosticCategory.Message, key: "Resolving_module_0_from_1_6086", message: "======== Resolving module '{0}' from '{1}'. ========" },
+        Explicitly_specified_module_resolution_kind_Colon_0: { code: 6087, category: ts.DiagnosticCategory.Message, key: "Explicitly_specified_module_resolution_kind_Colon_0_6087", message: "Explicitly specified module resolution kind: '{0}'." },
+        Module_resolution_kind_is_not_specified_using_0: { code: 6088, category: ts.DiagnosticCategory.Message, key: "Module_resolution_kind_is_not_specified_using_0_6088", message: "Module resolution kind is not specified, using '{0}'." },
+        Module_name_0_was_successfully_resolved_to_1: { code: 6089, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_successfully_resolved_to_1_6089", message: "======== Module name '{0}' was successfully resolved to '{1}'. ========" },
+        Module_name_0_was_not_resolved: { code: 6090, category: ts.DiagnosticCategory.Message, key: "Module_name_0_was_not_resolved_6090", message: "======== Module name '{0}' was not resolved. ========" },
+        paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0: { code: 6091, category: ts.DiagnosticCategory.Message, key: "paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0_6091", message: "'paths' option is specified, looking for a pattern to match module name '{0}'." },
+        Module_name_0_matched_pattern_1: { code: 6092, category: ts.DiagnosticCategory.Message, key: "Module_name_0_matched_pattern_1_6092", message: "Module name '{0}', matched pattern '{1}'." },
+        Trying_substitution_0_candidate_module_location_Colon_1: { code: 6093, category: ts.DiagnosticCategory.Message, key: "Trying_substitution_0_candidate_module_location_Colon_1_6093", message: "Trying substitution '{0}', candidate module location: '{1}'." },
+        Resolving_module_name_0_relative_to_base_url_1_2: { code: 6094, category: ts.DiagnosticCategory.Message, key: "Resolving_module_name_0_relative_to_base_url_1_2_6094", message: "Resolving module name '{0}' relative to base url '{1}' - '{2}'." },
+        Loading_module_as_file_Slash_folder_candidate_module_location_0: { code: 6095, category: ts.DiagnosticCategory.Message, key: "Loading_module_as_file_Slash_folder_candidate_module_location_0_6095", message: "Loading module as file / folder, candidate module location '{0}'." },
+        File_0_does_not_exist: { code: 6096, category: ts.DiagnosticCategory.Message, key: "File_0_does_not_exist_6096", message: "File '{0}' does not exist." },
+        File_0_exist_use_it_as_a_name_resolution_result: { code: 6097, category: ts.DiagnosticCategory.Message, key: "File_0_exist_use_it_as_a_name_resolution_result_6097", message: "File '{0}' exist - use it as a name resolution result." },
+        Loading_module_0_from_node_modules_folder: { code: 6098, category: ts.DiagnosticCategory.Message, key: "Loading_module_0_from_node_modules_folder_6098", message: "Loading module '{0}' from 'node_modules' folder." },
+        Found_package_json_at_0: { code: 6099, category: ts.DiagnosticCategory.Message, key: "Found_package_json_at_0_6099", message: "Found 'package.json' at '{0}'." },
+        package_json_does_not_have_types_field: { code: 6100, category: ts.DiagnosticCategory.Message, key: "package_json_does_not_have_types_field_6100", message: "'package.json' does not have 'types' field." },
+        package_json_has_0_field_1_that_references_2: { code: 6101, category: ts.DiagnosticCategory.Message, key: "package_json_has_0_field_1_that_references_2_6101", message: "'package.json' has '{0}' field '{1}' that references '{2}'." },
+        Allow_javascript_files_to_be_compiled: { code: 6102, category: ts.DiagnosticCategory.Message, key: "Allow_javascript_files_to_be_compiled_6102", message: "Allow javascript files to be compiled." },
+        Option_0_should_have_array_of_strings_as_a_value: { code: 6103, category: ts.DiagnosticCategory.Error, key: "Option_0_should_have_array_of_strings_as_a_value_6103", message: "Option '{0}' should have array of strings as a value." },
+        Checking_if_0_is_the_longest_matching_prefix_for_1_2: { code: 6104, category: ts.DiagnosticCategory.Message, key: "Checking_if_0_is_the_longest_matching_prefix_for_1_2_6104", message: "Checking if '{0}' is the longest matching prefix for '{1}' - '{2}'." },
+        Expected_type_of_0_field_in_package_json_to_be_string_got_1: { code: 6105, category: ts.DiagnosticCategory.Message, key: "Expected_type_of_0_field_in_package_json_to_be_string_got_1_6105", message: "Expected type of '{0}' field in 'package.json' to be 'string', got '{1}'." },
+        baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1: { code: 6106, category: ts.DiagnosticCategory.Message, key: "baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1_6106", message: "'baseUrl' option is set to '{0}', using this value to resolve non-relative module name '{1}'" },
+        rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0: { code: 6107, category: ts.DiagnosticCategory.Message, key: "rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0_6107", message: "'rootDirs' option is set, using it to resolve relative module name '{0}'" },
+        Longest_matching_prefix_for_0_is_1: { code: 6108, category: ts.DiagnosticCategory.Message, key: "Longest_matching_prefix_for_0_is_1_6108", message: "Longest matching prefix for '{0}' is '{1}'" },
+        Loading_0_from_the_root_dir_1_candidate_location_2: { code: 6109, category: ts.DiagnosticCategory.Message, key: "Loading_0_from_the_root_dir_1_candidate_location_2_6109", message: "Loading '{0}' from the root dir '{1}', candidate location '{2}'" },
+        Trying_other_entries_in_rootDirs: { code: 6110, category: ts.DiagnosticCategory.Message, key: "Trying_other_entries_in_rootDirs_6110", message: "Trying other entries in 'rootDirs'" },
+        Module_resolution_using_rootDirs_has_failed: { code: 6111, category: ts.DiagnosticCategory.Message, key: "Module_resolution_using_rootDirs_has_failed_6111", message: "Module resolution using 'rootDirs' has failed" },
+        Do_not_emit_use_strict_directives_in_module_output: { code: 6112, category: ts.DiagnosticCategory.Message, key: "Do_not_emit_use_strict_directives_in_module_output_6112", message: "Do not emit 'use strict' directives in module output." },
+        Enable_strict_null_checks: { code: 6113, category: ts.DiagnosticCategory.Message, key: "Enable_strict_null_checks_6113", message: "Enable strict null checks." },
+        Unknown_option_excludes_Did_you_mean_exclude: { code: 6114, category: ts.DiagnosticCategory.Error, key: "Unknown_option_excludes_Did_you_mean_exclude_6114", message: "Unknown option 'excludes'. Did you mean 'exclude'?" },
+        Raise_error_on_this_expressions_with_an_implied_any_type: { code: 6115, category: ts.DiagnosticCategory.Message, key: "Raise_error_on_this_expressions_with_an_implied_any_type_6115", message: "Raise error on 'this' expressions with an implied 'any' type." },
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_2: { code: 6116, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_2_6116", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory '{2}'. ========" },
+        Resolving_using_primary_search_paths: { code: 6117, category: ts.DiagnosticCategory.Message, key: "Resolving_using_primary_search_paths_6117", message: "Resolving using primary search paths..." },
+        Resolving_from_node_modules_folder: { code: 6118, category: ts.DiagnosticCategory.Message, key: "Resolving_from_node_modules_folder_6118", message: "Resolving from node_modules folder..." },
+        Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2: { code: 6119, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2_6119", message: "======== Type reference directive '{0}' was successfully resolved to '{1}', primary: {2}. ========" },
+        Type_reference_directive_0_was_not_resolved: { code: 6120, category: ts.DiagnosticCategory.Message, key: "Type_reference_directive_0_was_not_resolved_6120", message: "======== Type reference directive '{0}' was not resolved. ========" },
+        Resolving_with_primary_search_path_0: { code: 6121, category: ts.DiagnosticCategory.Message, key: "Resolving_with_primary_search_path_0_6121", message: "Resolving with primary search path '{0}'" },
+        Root_directory_cannot_be_determined_skipping_primary_search_paths: { code: 6122, category: ts.DiagnosticCategory.Message, key: "Root_directory_cannot_be_determined_skipping_primary_search_paths_6122", message: "Root directory cannot be determined, skipping primary search paths." },
+        Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set: { code: 6123, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set_6123", message: "======== Resolving type reference directive '{0}', containing file '{1}', root directory not set. ========" },
+        Type_declaration_files_to_be_included_in_compilation: { code: 6124, category: ts.DiagnosticCategory.Message, key: "Type_declaration_files_to_be_included_in_compilation_6124", message: "Type declaration files to be included in compilation." },
+        Looking_up_in_node_modules_folder_initial_location_0: { code: 6125, category: ts.DiagnosticCategory.Message, key: "Looking_up_in_node_modules_folder_initial_location_0_6125", message: "Looking up in 'node_modules' folder, initial location '{0}'" },
+        Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder: { code: 6126, category: ts.DiagnosticCategory.Message, key: "Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_mod_6126", message: "Containing file is not specified and root directory cannot be determined, skipping lookup in 'node_modules' folder." },
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1: { code: 6127, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1_6127", message: "======== Resolving type reference directive '{0}', containing file not set, root directory '{1}'. ========" },
+        Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set: { code: 6128, category: ts.DiagnosticCategory.Message, key: "Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set_6128", message: "======== Resolving type reference directive '{0}', containing file not set, root directory not set. ========" },
+        The_config_file_0_found_doesn_t_contain_any_source_files: { code: 6129, category: ts.DiagnosticCategory.Error, key: "The_config_file_0_found_doesn_t_contain_any_source_files_6129", message: "The config file '{0}' found doesn't contain any source files." },
+        Resolving_real_path_for_0_result_1: { code: 6130, category: ts.DiagnosticCategory.Message, key: "Resolving_real_path_for_0_result_1_6130", message: "Resolving real path for '{0}', result '{1}'" },
+        Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system: { code: 6131, category: ts.DiagnosticCategory.Error, key: "Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system_6131", message: "Cannot compile modules using option '{0}' unless the '--module' flag is 'amd' or 'system'." },
+        File_name_0_has_a_1_extension_stripping_it: { code: 6132, category: ts.DiagnosticCategory.Message, key: "File_name_0_has_a_1_extension_stripping_it_6132", message: "File name '{0}' has a '{1}' extension - stripping it" },
+        Variable_0_implicitly_has_an_1_type: { code: 7005, category: ts.DiagnosticCategory.Error, key: "Variable_0_implicitly_has_an_1_type_7005", message: "Variable '{0}' implicitly has an '{1}' type." },
+        Parameter_0_implicitly_has_an_1_type: { code: 7006, category: ts.DiagnosticCategory.Error, key: "Parameter_0_implicitly_has_an_1_type_7006", message: "Parameter '{0}' implicitly has an '{1}' type." },
+        Member_0_implicitly_has_an_1_type: { code: 7008, category: ts.DiagnosticCategory.Error, key: "Member_0_implicitly_has_an_1_type_7008", message: "Member '{0}' implicitly has an '{1}' type." },
+        new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type: { code: 7009, category: ts.DiagnosticCategory.Error, key: "new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type_7009", message: "'new' expression, whose target lacks a construct signature, implicitly has an 'any' type." },
+        _0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type: { code: 7010, category: ts.DiagnosticCategory.Error, key: "_0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type_7010", message: "'{0}', which lacks return-type annotation, implicitly has an '{1}' return type." },
+        Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type: { code: 7011, category: ts.DiagnosticCategory.Error, key: "Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type_7011", message: "Function expression, which lacks return-type annotation, implicitly has an '{0}' return type." },
+        Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7013, category: ts.DiagnosticCategory.Error, key: "Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7013", message: "Construct signature, which lacks return-type annotation, implicitly has an 'any' return type." },
+        Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number: { code: 7015, category: ts.DiagnosticCategory.Error, key: "Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number_7015", message: "Element implicitly has an 'any' type because index expression is not of type 'number'." },
+        Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation: { code: 7016, category: ts.DiagnosticCategory.Error, key: "Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation_7016", message: "Property '{0}' implicitly has type 'any', because its 'set' accessor lacks a type annotation." },
+        Index_signature_of_object_type_implicitly_has_an_any_type: { code: 7017, category: ts.DiagnosticCategory.Error, key: "Index_signature_of_object_type_implicitly_has_an_any_type_7017", message: "Index signature of object type implicitly has an 'any' type." },
+        Object_literal_s_property_0_implicitly_has_an_1_type: { code: 7018, category: ts.DiagnosticCategory.Error, key: "Object_literal_s_property_0_implicitly_has_an_1_type_7018", message: "Object literal's property '{0}' implicitly has an '{1}' type." },
+        Rest_parameter_0_implicitly_has_an_any_type: { code: 7019, category: ts.DiagnosticCategory.Error, key: "Rest_parameter_0_implicitly_has_an_any_type_7019", message: "Rest parameter '{0}' implicitly has an 'any[]' type." },
+        Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type: { code: 7020, category: ts.DiagnosticCategory.Error, key: "Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type_7020", message: "Call signature, which lacks return-type annotation, implicitly has an 'any' return type." },
+        _0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer: { code: 7022, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or__7022", message: "'{0}' implicitly has type 'any' because it does not have a type annotation and is referenced directly or indirectly in its own initializer." },
+        _0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7023, category: ts.DiagnosticCategory.Error, key: "_0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_reference_7023", message: "'{0}' implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
+        Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions: { code: 7024, category: ts.DiagnosticCategory.Error, key: "Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_ref_7024", message: "Function implicitly has return type 'any' because it does not have a return type annotation and is referenced directly or indirectly in one of its return expressions." },
+        Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type: { code: 7025, category: ts.DiagnosticCategory.Error, key: "Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_typ_7025", message: "Generator implicitly has type '{0}' because it does not yield any values. Consider supplying a return type." },
+        JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists: { code: 7026, category: ts.DiagnosticCategory.Error, key: "JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists_7026", message: "JSX element implicitly has type 'any' because no interface 'JSX.{0}' exists" },
+        Unreachable_code_detected: { code: 7027, category: ts.DiagnosticCategory.Error, key: "Unreachable_code_detected_7027", message: "Unreachable code detected." },
+        Unused_label: { code: 7028, category: ts.DiagnosticCategory.Error, key: "Unused_label_7028", message: "Unused label." },
+        Fallthrough_case_in_switch: { code: 7029, category: ts.DiagnosticCategory.Error, key: "Fallthrough_case_in_switch_7029", message: "Fallthrough case in switch." },
+        Not_all_code_paths_return_a_value: { code: 7030, category: ts.DiagnosticCategory.Error, key: "Not_all_code_paths_return_a_value_7030", message: "Not all code paths return a value." },
+        Binding_element_0_implicitly_has_an_1_type: { code: 7031, category: ts.DiagnosticCategory.Error, key: "Binding_element_0_implicitly_has_an_1_type_7031", message: "Binding element '{0}' implicitly has an '{1}' type." },
+        You_cannot_rename_this_element: { code: 8000, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_this_element_8000", message: "You cannot rename this element." },
+        You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library: { code: 8001, category: ts.DiagnosticCategory.Error, key: "You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library_8001", message: "You cannot rename elements that are defined in the standard TypeScript library." },
+        import_can_only_be_used_in_a_ts_file: { code: 8002, category: ts.DiagnosticCategory.Error, key: "import_can_only_be_used_in_a_ts_file_8002", message: "'import ... =' can only be used in a .ts file." },
+        export_can_only_be_used_in_a_ts_file: { code: 8003, category: ts.DiagnosticCategory.Error, key: "export_can_only_be_used_in_a_ts_file_8003", message: "'export=' can only be used in a .ts file." },
+        type_parameter_declarations_can_only_be_used_in_a_ts_file: { code: 8004, category: ts.DiagnosticCategory.Error, key: "type_parameter_declarations_can_only_be_used_in_a_ts_file_8004", message: "'type parameter declarations' can only be used in a .ts file." },
+        implements_clauses_can_only_be_used_in_a_ts_file: { code: 8005, category: ts.DiagnosticCategory.Error, key: "implements_clauses_can_only_be_used_in_a_ts_file_8005", message: "'implements clauses' can only be used in a .ts file." },
+        interface_declarations_can_only_be_used_in_a_ts_file: { code: 8006, category: ts.DiagnosticCategory.Error, key: "interface_declarations_can_only_be_used_in_a_ts_file_8006", message: "'interface declarations' can only be used in a .ts file." },
+        module_declarations_can_only_be_used_in_a_ts_file: { code: 8007, category: ts.DiagnosticCategory.Error, key: "module_declarations_can_only_be_used_in_a_ts_file_8007", message: "'module declarations' can only be used in a .ts file." },
+        type_aliases_can_only_be_used_in_a_ts_file: { code: 8008, category: ts.DiagnosticCategory.Error, key: "type_aliases_can_only_be_used_in_a_ts_file_8008", message: "'type aliases' can only be used in a .ts file." },
+        _0_can_only_be_used_in_a_ts_file: { code: 8009, category: ts.DiagnosticCategory.Error, key: "_0_can_only_be_used_in_a_ts_file_8009", message: "'{0}' can only be used in a .ts file." },
+        types_can_only_be_used_in_a_ts_file: { code: 8010, category: ts.DiagnosticCategory.Error, key: "types_can_only_be_used_in_a_ts_file_8010", message: "'types' can only be used in a .ts file." },
+        type_arguments_can_only_be_used_in_a_ts_file: { code: 8011, category: ts.DiagnosticCategory.Error, key: "type_arguments_can_only_be_used_in_a_ts_file_8011", message: "'type arguments' can only be used in a .ts file." },
+        parameter_modifiers_can_only_be_used_in_a_ts_file: { code: 8012, category: ts.DiagnosticCategory.Error, key: "parameter_modifiers_can_only_be_used_in_a_ts_file_8012", message: "'parameter modifiers' can only be used in a .ts file." },
+        property_declarations_can_only_be_used_in_a_ts_file: { code: 8014, category: ts.DiagnosticCategory.Error, key: "property_declarations_can_only_be_used_in_a_ts_file_8014", message: "'property declarations' can only be used in a .ts file." },
+        enum_declarations_can_only_be_used_in_a_ts_file: { code: 8015, category: ts.DiagnosticCategory.Error, key: "enum_declarations_can_only_be_used_in_a_ts_file_8015", message: "'enum declarations' can only be used in a .ts file." },
+        type_assertion_expressions_can_only_be_used_in_a_ts_file: { code: 8016, category: ts.DiagnosticCategory.Error, key: "type_assertion_expressions_can_only_be_used_in_a_ts_file_8016", message: "'type assertion expressions' can only be used in a .ts file." },
+        Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_class_extends_clauses: { code: 9002, category: ts.DiagnosticCategory.Error, key: "Only_identifiers_Slashqualified_names_with_optional_type_arguments_are_currently_supported_in_a_clas_9002", message: "Only identifiers/qualified-names with optional type arguments are currently supported in a class 'extends' clauses." },
+        class_expressions_are_not_currently_supported: { code: 9003, category: ts.DiagnosticCategory.Error, key: "class_expressions_are_not_currently_supported_9003", message: "'class' expressions are not currently supported." },
+        JSX_attributes_must_only_be_assigned_a_non_empty_expression: { code: 17000, category: ts.DiagnosticCategory.Error, key: "JSX_attributes_must_only_be_assigned_a_non_empty_expression_17000", message: "JSX attributes must only be assigned a non-empty 'expression'." },
+        JSX_elements_cannot_have_multiple_attributes_with_the_same_name: { code: 17001, category: ts.DiagnosticCategory.Error, key: "JSX_elements_cannot_have_multiple_attributes_with_the_same_name_17001", message: "JSX elements cannot have multiple attributes with the same name." },
+        Expected_corresponding_JSX_closing_tag_for_0: { code: 17002, category: ts.DiagnosticCategory.Error, key: "Expected_corresponding_JSX_closing_tag_for_0_17002", message: "Expected corresponding JSX closing tag for '{0}'." },
+        JSX_attribute_expected: { code: 17003, category: ts.DiagnosticCategory.Error, key: "JSX_attribute_expected_17003", message: "JSX attribute expected." },
+        Cannot_use_JSX_unless_the_jsx_flag_is_provided: { code: 17004, category: ts.DiagnosticCategory.Error, key: "Cannot_use_JSX_unless_the_jsx_flag_is_provided_17004", message: "Cannot use JSX unless the '--jsx' flag is provided." },
+        A_constructor_cannot_contain_a_super_call_when_its_class_extends_null: { code: 17005, category: ts.DiagnosticCategory.Error, key: "A_constructor_cannot_contain_a_super_call_when_its_class_extends_null_17005", message: "A constructor cannot contain a 'super' call when its class extends 'null'" },
+        An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17006, category: ts.DiagnosticCategory.Error, key: "An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_ex_17006", message: "An unary expression with the '{0}' operator is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
+        A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses: { code: 17007, category: ts.DiagnosticCategory.Error, key: "A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Con_17007", message: "A type assertion expression is not allowed in the left-hand side of an exponentiation expression. Consider enclosing the expression in parentheses." },
+        JSX_element_0_has_no_corresponding_closing_tag: { code: 17008, category: ts.DiagnosticCategory.Error, key: "JSX_element_0_has_no_corresponding_closing_tag_17008", message: "JSX element '{0}' has no corresponding closing tag." },
+        super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class: { code: 17009, category: ts.DiagnosticCategory.Error, key: "super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class_17009", message: "'super' must be called before accessing 'this' in the constructor of a derived class." },
+        Unknown_typing_option_0: { code: 17010, category: ts.DiagnosticCategory.Error, key: "Unknown_typing_option_0_17010", message: "Unknown typing option '{0}'." }
+    };
+})(ts || (ts = {}));
+/// <reference path="core.ts"/>
+/// <reference path="diagnosticInformationMap.generated.ts"/>
+var ts;
+(function (ts) {
+    /* @internal */
+    function tokenIsIdentifierOrKeyword(token) {
+        return token >= 69 /* Identifier */;
+    }
+    ts.tokenIsIdentifierOrKeyword = tokenIsIdentifierOrKeyword;
+    var textToToken = {
+        "abstract": 115 /* AbstractKeyword */,
+        "any": 117 /* AnyKeyword */,
+        "as": 116 /* AsKeyword */,
+        "boolean": 120 /* BooleanKeyword */,
+        "break": 70 /* BreakKeyword */,
+        "case": 71 /* CaseKeyword */,
+        "catch": 72 /* CatchKeyword */,
+        "class": 73 /* ClassKeyword */,
+        "continue": 75 /* ContinueKeyword */,
+        "const": 74 /* ConstKeyword */,
+        "constructor": 121 /* ConstructorKeyword */,
+        "debugger": 76 /* DebuggerKeyword */,
+        "declare": 122 /* DeclareKeyword */,
+        "default": 77 /* DefaultKeyword */,
+        "delete": 78 /* DeleteKeyword */,
+        "do": 79 /* DoKeyword */,
+        "else": 80 /* ElseKeyword */,
+        "enum": 81 /* EnumKeyword */,
+        "export": 82 /* ExportKeyword */,
+        "extends": 83 /* ExtendsKeyword */,
+        "false": 84 /* FalseKeyword */,
+        "finally": 85 /* FinallyKeyword */,
+        "for": 86 /* ForKeyword */,
+        "from": 136 /* FromKeyword */,
+        "function": 87 /* FunctionKeyword */,
+        "get": 123 /* GetKeyword */,
+        "if": 88 /* IfKeyword */,
+        "implements": 106 /* ImplementsKeyword */,
+        "import": 89 /* ImportKeyword */,
+        "in": 90 /* InKeyword */,
+        "instanceof": 91 /* InstanceOfKeyword */,
+        "interface": 107 /* InterfaceKeyword */,
+        "is": 124 /* IsKeyword */,
+        "let": 108 /* LetKeyword */,
+        "module": 125 /* ModuleKeyword */,
+        "namespace": 126 /* NamespaceKeyword */,
+        "never": 127 /* NeverKeyword */,
+        "new": 92 /* NewKeyword */,
+        "null": 93 /* NullKeyword */,
+        "number": 130 /* NumberKeyword */,
+        "package": 109 /* PackageKeyword */,
+        "private": 110 /* PrivateKeyword */,
+        "protected": 111 /* ProtectedKeyword */,
+        "public": 112 /* PublicKeyword */,
+        "readonly": 128 /* ReadonlyKeyword */,
+        "require": 129 /* RequireKeyword */,
+        "global": 137 /* GlobalKeyword */,
+        "return": 94 /* ReturnKeyword */,
+        "set": 131 /* SetKeyword */,
+        "static": 113 /* StaticKeyword */,
+        "string": 132 /* StringKeyword */,
+        "super": 95 /* SuperKeyword */,
+        "switch": 96 /* SwitchKeyword */,
+        "symbol": 133 /* SymbolKeyword */,
+        "this": 97 /* ThisKeyword */,
+        "throw": 98 /* ThrowKeyword */,
+        "true": 99 /* TrueKeyword */,
+        "try": 100 /* TryKeyword */,
+        "type": 134 /* TypeKeyword */,
+        "typeof": 101 /* TypeOfKeyword */,
+        "undefined": 135 /* UndefinedKeyword */,
+        "var": 102 /* VarKeyword */,
+        "void": 103 /* VoidKeyword */,
+        "while": 104 /* WhileKeyword */,
+        "with": 105 /* WithKeyword */,
+        "yield": 114 /* YieldKeyword */,
+        "async": 118 /* AsyncKeyword */,
+        "await": 119 /* AwaitKeyword */,
+        "of": 138 /* OfKeyword */,
+        "{": 15 /* OpenBraceToken */,
+        "}": 16 /* CloseBraceToken */,
+        "(": 17 /* OpenParenToken */,
+        ")": 18 /* CloseParenToken */,
+        "[": 19 /* OpenBracketToken */,
+        "]": 20 /* CloseBracketToken */,
+        ".": 21 /* DotToken */,
+        "...": 22 /* DotDotDotToken */,
+        ";": 23 /* SemicolonToken */,
+        ",": 24 /* CommaToken */,
+        "<": 25 /* LessThanToken */,
+        ">": 27 /* GreaterThanToken */,
+        "<=": 28 /* LessThanEqualsToken */,
+        ">=": 29 /* GreaterThanEqualsToken */,
+        "==": 30 /* EqualsEqualsToken */,
+        "!=": 31 /* ExclamationEqualsToken */,
+        "===": 32 /* EqualsEqualsEqualsToken */,
+        "!==": 33 /* ExclamationEqualsEqualsToken */,
+        "=>": 34 /* EqualsGreaterThanToken */,
+        "+": 35 /* PlusToken */,
+        "-": 36 /* MinusToken */,
+        "**": 38 /* AsteriskAsteriskToken */,
+        "*": 37 /* AsteriskToken */,
+        "/": 39 /* SlashToken */,
+        "%": 40 /* PercentToken */,
+        "++": 41 /* PlusPlusToken */,
+        "--": 42 /* MinusMinusToken */,
+        "<<": 43 /* LessThanLessThanToken */,
+        "</": 26 /* LessThanSlashToken */,
+        ">>": 44 /* GreaterThanGreaterThanToken */,
+        ">>>": 45 /* GreaterThanGreaterThanGreaterThanToken */,
+        "&": 46 /* AmpersandToken */,
+        "|": 47 /* BarToken */,
+        "^": 48 /* CaretToken */,
+        "!": 49 /* ExclamationToken */,
+        "~": 50 /* TildeToken */,
+        "&&": 51 /* AmpersandAmpersandToken */,
+        "||": 52 /* BarBarToken */,
+        "?": 53 /* QuestionToken */,
+        ":": 54 /* ColonToken */,
+        "=": 56 /* EqualsToken */,
+        "+=": 57 /* PlusEqualsToken */,
+        "-=": 58 /* MinusEqualsToken */,
+        "*=": 59 /* AsteriskEqualsToken */,
+        "**=": 60 /* AsteriskAsteriskEqualsToken */,
+        "/=": 61 /* SlashEqualsToken */,
+        "%=": 62 /* PercentEqualsToken */,
+        "<<=": 63 /* LessThanLessThanEqualsToken */,
+        ">>=": 64 /* GreaterThanGreaterThanEqualsToken */,
+        ">>>=": 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */,
+        "&=": 66 /* AmpersandEqualsToken */,
+        "|=": 67 /* BarEqualsToken */,
+        "^=": 68 /* CaretEqualsToken */,
+        "@": 55 /* AtToken */
+    };
+    /*
+        As per ECMAScript Language Specification 3th Edition, Section 7.6: Identifiers
+        IdentifierStart ::
+            Can contain Unicode 3.0.0  categories:
+            Uppercase letter (Lu),
+            Lowercase letter (Ll),
+            Titlecase letter (Lt),
+            Modifier letter (Lm),
+            Other letter (Lo), or
+            Letter number (Nl).
+        IdentifierPart :: =
+            Can contain IdentifierStart + Unicode 3.0.0  categories:
+            Non-spacing mark (Mn),
+            Combining spacing mark (Mc),
+            Decimal number (Nd), or
+            Connector punctuation (Pc).
+
+        Codepoint ranges for ES3 Identifiers are extracted from the Unicode 3.0.0 specification at:
+        http://www.unicode.org/Public/3.0-Update/UnicodeData-3.0.0.txt
+    */
+    var unicodeES3IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1610, 1649, 1747, 1749, 1749, 1765, 1766, 1786, 1788, 1808, 1808, 1810, 1836, 1920, 1957, 2309, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2784, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3294, 3294, 3296, 3297, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3424, 3425, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3805, 3840, 3840, 3904, 3911, 3913, 3946, 3976, 3979, 4096, 4129, 4131, 4135, 4137, 4138, 4176, 4181, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6067, 6176, 6263, 6272, 6312, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8319, 8319, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12346, 12353, 12436, 12445, 12446, 12449, 12538, 12540, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65138, 65140, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    var unicodeES3IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 543, 546, 563, 592, 685, 688, 696, 699, 705, 720, 721, 736, 740, 750, 750, 768, 846, 864, 866, 890, 890, 902, 902, 904, 906, 908, 908, 910, 929, 931, 974, 976, 983, 986, 1011, 1024, 1153, 1155, 1158, 1164, 1220, 1223, 1224, 1227, 1228, 1232, 1269, 1272, 1273, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1441, 1443, 1465, 1467, 1469, 1471, 1471, 1473, 1474, 1476, 1476, 1488, 1514, 1520, 1522, 1569, 1594, 1600, 1621, 1632, 1641, 1648, 1747, 1749, 1756, 1759, 1768, 1770, 1773, 1776, 1788, 1808, 1836, 1840, 1866, 1920, 1968, 2305, 2307, 2309, 2361, 2364, 2381, 2384, 2388, 2392, 2403, 2406, 2415, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2492, 2494, 2500, 2503, 2504, 2507, 2509, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2562, 2562, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2649, 2652, 2654, 2654, 2662, 2676, 2689, 2691, 2693, 2699, 2701, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2784, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2870, 2873, 2876, 2883, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2913, 2918, 2927, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 2997, 2999, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3031, 3031, 3047, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3134, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3168, 3169, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3262, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3297, 3302, 3311, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3368, 3370, 3385, 3390, 3395, 3398, 3400, 3402, 3405, 3415, 3415, 3424, 3425, 3430, 3439, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3805, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3946, 3953, 3972, 3974, 3979, 3984, 3991, 3993, 4028, 4038, 4038, 4096, 4129, 4131, 4135, 4137, 4138, 4140, 4146, 4150, 4153, 4160, 4169, 4176, 4185, 4256, 4293, 4304, 4342, 4352, 4441, 4447, 4514, 4520, 4601, 4608, 4614, 4616, 4678, 4680, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4742, 4744, 4744, 4746, 4749, 4752, 4782, 4784, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4814, 4816, 4822, 4824, 4846, 4848, 4878, 4880, 4880, 4882, 4885, 4888, 4894, 4896, 4934, 4936, 4954, 4969, 4977, 5024, 5108, 5121, 5740, 5743, 5750, 5761, 5786, 5792, 5866, 6016, 6099, 6112, 6121, 6160, 6169, 6176, 6263, 6272, 6313, 7680, 7835, 7840, 7929, 7936, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8255, 8256, 8319, 8319, 8400, 8412, 8417, 8417, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8497, 8499, 8505, 8544, 8579, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12346, 12353, 12436, 12441, 12442, 12445, 12446, 12449, 12542, 12549, 12588, 12593, 12686, 12704, 12727, 13312, 19893, 19968, 40869, 40960, 42124, 44032, 55203, 63744, 64045, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65056, 65059, 65075, 65076, 65101, 65103, 65136, 65138, 65140, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65381, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    /*
+        As per ECMAScript Language Specification 5th Edition, Section 7.6: ISyntaxToken Names and Identifiers
+        IdentifierStart ::
+            Can contain Unicode 6.2  categories:
+            Uppercase letter (Lu),
+            Lowercase letter (Ll),
+            Titlecase letter (Lt),
+            Modifier letter (Lm),
+            Other letter (Lo), or
+            Letter number (Nl).
+        IdentifierPart ::
+            Can contain IdentifierStart + Unicode 6.2  categories:
+            Non-spacing mark (Mn),
+            Combining spacing mark (Mc),
+            Decimal number (Nd),
+            Connector punctuation (Pc),
+            <ZWNJ>, or
+            <ZWJ>.
+
+        Codepoint ranges for ES5 Identifiers are extracted from the Unicode 6.2 specification at:
+        http://www.unicode.org/Public/6.2.0/ucd/UnicodeData.txt
+    */
+    var unicodeES5IdentifierStart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 880, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1488, 1514, 1520, 1522, 1568, 1610, 1646, 1647, 1649, 1747, 1749, 1749, 1765, 1766, 1774, 1775, 1786, 1788, 1791, 1791, 1808, 1808, 1810, 1839, 1869, 1957, 1969, 1969, 1994, 2026, 2036, 2037, 2042, 2042, 2048, 2069, 2074, 2074, 2084, 2084, 2088, 2088, 2112, 2136, 2208, 2208, 2210, 2220, 2308, 2361, 2365, 2365, 2384, 2384, 2392, 2401, 2417, 2423, 2425, 2431, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2493, 2493, 2510, 2510, 2524, 2525, 2527, 2529, 2544, 2545, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2649, 2652, 2654, 2654, 2674, 2676, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2749, 2749, 2768, 2768, 2784, 2785, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2877, 2877, 2908, 2909, 2911, 2913, 2929, 2929, 2947, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3024, 3024, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3133, 3160, 3161, 3168, 3169, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3261, 3261, 3294, 3294, 3296, 3297, 3313, 3314, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3389, 3406, 3406, 3424, 3425, 3450, 3455, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3585, 3632, 3634, 3635, 3648, 3654, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3760, 3762, 3763, 3773, 3773, 3776, 3780, 3782, 3782, 3804, 3807, 3840, 3840, 3904, 3911, 3913, 3948, 3976, 3980, 4096, 4138, 4159, 4159, 4176, 4181, 4186, 4189, 4193, 4193, 4197, 4198, 4206, 4208, 4213, 4225, 4238, 4238, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5905, 5920, 5937, 5952, 5969, 5984, 5996, 5998, 6000, 6016, 6067, 6103, 6103, 6108, 6108, 6176, 6263, 6272, 6312, 6314, 6314, 6320, 6389, 6400, 6428, 6480, 6509, 6512, 6516, 6528, 6571, 6593, 6599, 6656, 6678, 6688, 6740, 6823, 6823, 6917, 6963, 6981, 6987, 7043, 7072, 7086, 7087, 7098, 7141, 7168, 7203, 7245, 7247, 7258, 7293, 7401, 7404, 7406, 7409, 7413, 7414, 7424, 7615, 7680, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8305, 8305, 8319, 8319, 8336, 8348, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11502, 11506, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11648, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11823, 11823, 12293, 12295, 12321, 12329, 12337, 12341, 12344, 12348, 12353, 12438, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42527, 42538, 42539, 42560, 42606, 42623, 42647, 42656, 42735, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43009, 43011, 43013, 43015, 43018, 43020, 43042, 43072, 43123, 43138, 43187, 43250, 43255, 43259, 43259, 43274, 43301, 43312, 43334, 43360, 43388, 43396, 43442, 43471, 43471, 43520, 43560, 43584, 43586, 43588, 43595, 43616, 43638, 43642, 43642, 43648, 43695, 43697, 43697, 43701, 43702, 43705, 43709, 43712, 43712, 43714, 43714, 43739, 43741, 43744, 43754, 43762, 43764, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44002, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64285, 64287, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65136, 65140, 65142, 65276, 65313, 65338, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    var unicodeES5IdentifierPart = [170, 170, 181, 181, 186, 186, 192, 214, 216, 246, 248, 705, 710, 721, 736, 740, 748, 748, 750, 750, 768, 884, 886, 887, 890, 893, 902, 902, 904, 906, 908, 908, 910, 929, 931, 1013, 1015, 1153, 1155, 1159, 1162, 1319, 1329, 1366, 1369, 1369, 1377, 1415, 1425, 1469, 1471, 1471, 1473, 1474, 1476, 1477, 1479, 1479, 1488, 1514, 1520, 1522, 1552, 1562, 1568, 1641, 1646, 1747, 1749, 1756, 1759, 1768, 1770, 1788, 1791, 1791, 1808, 1866, 1869, 1969, 1984, 2037, 2042, 2042, 2048, 2093, 2112, 2139, 2208, 2208, 2210, 2220, 2276, 2302, 2304, 2403, 2406, 2415, 2417, 2423, 2425, 2431, 2433, 2435, 2437, 2444, 2447, 2448, 2451, 2472, 2474, 2480, 2482, 2482, 2486, 2489, 2492, 2500, 2503, 2504, 2507, 2510, 2519, 2519, 2524, 2525, 2527, 2531, 2534, 2545, 2561, 2563, 2565, 2570, 2575, 2576, 2579, 2600, 2602, 2608, 2610, 2611, 2613, 2614, 2616, 2617, 2620, 2620, 2622, 2626, 2631, 2632, 2635, 2637, 2641, 2641, 2649, 2652, 2654, 2654, 2662, 2677, 2689, 2691, 2693, 2701, 2703, 2705, 2707, 2728, 2730, 2736, 2738, 2739, 2741, 2745, 2748, 2757, 2759, 2761, 2763, 2765, 2768, 2768, 2784, 2787, 2790, 2799, 2817, 2819, 2821, 2828, 2831, 2832, 2835, 2856, 2858, 2864, 2866, 2867, 2869, 2873, 2876, 2884, 2887, 2888, 2891, 2893, 2902, 2903, 2908, 2909, 2911, 2915, 2918, 2927, 2929, 2929, 2946, 2947, 2949, 2954, 2958, 2960, 2962, 2965, 2969, 2970, 2972, 2972, 2974, 2975, 2979, 2980, 2984, 2986, 2990, 3001, 3006, 3010, 3014, 3016, 3018, 3021, 3024, 3024, 3031, 3031, 3046, 3055, 3073, 3075, 3077, 3084, 3086, 3088, 3090, 3112, 3114, 3123, 3125, 3129, 3133, 3140, 3142, 3144, 3146, 3149, 3157, 3158, 3160, 3161, 3168, 3171, 3174, 3183, 3202, 3203, 3205, 3212, 3214, 3216, 3218, 3240, 3242, 3251, 3253, 3257, 3260, 3268, 3270, 3272, 3274, 3277, 3285, 3286, 3294, 3294, 3296, 3299, 3302, 3311, 3313, 3314, 3330, 3331, 3333, 3340, 3342, 3344, 3346, 3386, 3389, 3396, 3398, 3400, 3402, 3406, 3415, 3415, 3424, 3427, 3430, 3439, 3450, 3455, 3458, 3459, 3461, 3478, 3482, 3505, 3507, 3515, 3517, 3517, 3520, 3526, 3530, 3530, 3535, 3540, 3542, 3542, 3544, 3551, 3570, 3571, 3585, 3642, 3648, 3662, 3664, 3673, 3713, 3714, 3716, 3716, 3719, 3720, 3722, 3722, 3725, 3725, 3732, 3735, 3737, 3743, 3745, 3747, 3749, 3749, 3751, 3751, 3754, 3755, 3757, 3769, 3771, 3773, 3776, 3780, 3782, 3782, 3784, 3789, 3792, 3801, 3804, 3807, 3840, 3840, 3864, 3865, 3872, 3881, 3893, 3893, 3895, 3895, 3897, 3897, 3902, 3911, 3913, 3948, 3953, 3972, 3974, 3991, 3993, 4028, 4038, 4038, 4096, 4169, 4176, 4253, 4256, 4293, 4295, 4295, 4301, 4301, 4304, 4346, 4348, 4680, 4682, 4685, 4688, 4694, 4696, 4696, 4698, 4701, 4704, 4744, 4746, 4749, 4752, 4784, 4786, 4789, 4792, 4798, 4800, 4800, 4802, 4805, 4808, 4822, 4824, 4880, 4882, 4885, 4888, 4954, 4957, 4959, 4992, 5007, 5024, 5108, 5121, 5740, 5743, 5759, 5761, 5786, 5792, 5866, 5870, 5872, 5888, 5900, 5902, 5908, 5920, 5940, 5952, 5971, 5984, 5996, 5998, 6000, 6002, 6003, 6016, 6099, 6103, 6103, 6108, 6109, 6112, 6121, 6155, 6157, 6160, 6169, 6176, 6263, 6272, 6314, 6320, 6389, 6400, 6428, 6432, 6443, 6448, 6459, 6470, 6509, 6512, 6516, 6528, 6571, 6576, 6601, 6608, 6617, 6656, 6683, 6688, 6750, 6752, 6780, 6783, 6793, 6800, 6809, 6823, 6823, 6912, 6987, 6992, 7001, 7019, 7027, 7040, 7155, 7168, 7223, 7232, 7241, 7245, 7293, 7376, 7378, 7380, 7414, 7424, 7654, 7676, 7957, 7960, 7965, 7968, 8005, 8008, 8013, 8016, 8023, 8025, 8025, 8027, 8027, 8029, 8029, 8031, 8061, 8064, 8116, 8118, 8124, 8126, 8126, 8130, 8132, 8134, 8140, 8144, 8147, 8150, 8155, 8160, 8172, 8178, 8180, 8182, 8188, 8204, 8205, 8255, 8256, 8276, 8276, 8305, 8305, 8319, 8319, 8336, 8348, 8400, 8412, 8417, 8417, 8421, 8432, 8450, 8450, 8455, 8455, 8458, 8467, 8469, 8469, 8473, 8477, 8484, 8484, 8486, 8486, 8488, 8488, 8490, 8493, 8495, 8505, 8508, 8511, 8517, 8521, 8526, 8526, 8544, 8584, 11264, 11310, 11312, 11358, 11360, 11492, 11499, 11507, 11520, 11557, 11559, 11559, 11565, 11565, 11568, 11623, 11631, 11631, 11647, 11670, 11680, 11686, 11688, 11694, 11696, 11702, 11704, 11710, 11712, 11718, 11720, 11726, 11728, 11734, 11736, 11742, 11744, 11775, 11823, 11823, 12293, 12295, 12321, 12335, 12337, 12341, 12344, 12348, 12353, 12438, 12441, 12442, 12445, 12447, 12449, 12538, 12540, 12543, 12549, 12589, 12593, 12686, 12704, 12730, 12784, 12799, 13312, 19893, 19968, 40908, 40960, 42124, 42192, 42237, 42240, 42508, 42512, 42539, 42560, 42607, 42612, 42621, 42623, 42647, 42655, 42737, 42775, 42783, 42786, 42888, 42891, 42894, 42896, 42899, 42912, 42922, 43000, 43047, 43072, 43123, 43136, 43204, 43216, 43225, 43232, 43255, 43259, 43259, 43264, 43309, 43312, 43347, 43360, 43388, 43392, 43456, 43471, 43481, 43520, 43574, 43584, 43597, 43600, 43609, 43616, 43638, 43642, 43643, 43648, 43714, 43739, 43741, 43744, 43759, 43762, 43766, 43777, 43782, 43785, 43790, 43793, 43798, 43808, 43814, 43816, 43822, 43968, 44010, 44012, 44013, 44016, 44025, 44032, 55203, 55216, 55238, 55243, 55291, 63744, 64109, 64112, 64217, 64256, 64262, 64275, 64279, 64285, 64296, 64298, 64310, 64312, 64316, 64318, 64318, 64320, 64321, 64323, 64324, 64326, 64433, 64467, 64829, 64848, 64911, 64914, 64967, 65008, 65019, 65024, 65039, 65056, 65062, 65075, 65076, 65101, 65103, 65136, 65140, 65142, 65276, 65296, 65305, 65313, 65338, 65343, 65343, 65345, 65370, 65382, 65470, 65474, 65479, 65482, 65487, 65490, 65495, 65498, 65500,];
+    function lookupInUnicodeMap(code, map) {
+        // Bail out quickly if it couldn't possibly be in the map.
+        if (code < map[0]) {
+            return false;
+        }
+        // Perform binary search in one of the Unicode range maps
+        var lo = 0;
+        var hi = map.length;
+        var mid;
+        while (lo + 1 < hi) {
+            mid = lo + (hi - lo) / 2;
+            // mid has to be even to catch a range's beginning
+            mid -= mid % 2;
+            if (map[mid] <= code && code <= map[mid + 1]) {
+                return true;
+            }
+            if (code < map[mid]) {
+                hi = mid;
+            }
+            else {
+                lo = mid + 2;
+            }
+        }
+        return false;
+    }
+    /* @internal */ function isUnicodeIdentifierStart(code, languageVersion) {
+        return languageVersion >= 1 /* ES5 */ ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierStart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierStart);
+    }
+    ts.isUnicodeIdentifierStart = isUnicodeIdentifierStart;
+    function isUnicodeIdentifierPart(code, languageVersion) {
+        return languageVersion >= 1 /* ES5 */ ?
+            lookupInUnicodeMap(code, unicodeES5IdentifierPart) :
+            lookupInUnicodeMap(code, unicodeES3IdentifierPart);
+    }
+    function makeReverseMap(source) {
+        var result = [];
+        for (var name_4 in source) {
+            if (source.hasOwnProperty(name_4)) {
+                result[source[name_4]] = name_4;
+            }
+        }
+        return result;
+    }
+    var tokenStrings = makeReverseMap(textToToken);
+    function tokenToString(t) {
+        return tokenStrings[t];
+    }
+    ts.tokenToString = tokenToString;
+    /* @internal */
+    function stringToToken(s) {
+        return textToToken[s];
+    }
+    ts.stringToToken = stringToToken;
+    /* @internal */
+    function computeLineStarts(text) {
+        var result = new Array();
+        var pos = 0;
+        var lineStart = 0;
+        while (pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 13 /* carriageReturn */:
+                    if (text.charCodeAt(pos) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                case 10 /* lineFeed */:
+                    result.push(lineStart);
+                    lineStart = pos;
+                    break;
+                default:
+                    if (ch > 127 /* maxAsciiCharacter */ && isLineBreak(ch)) {
+                        result.push(lineStart);
+                        lineStart = pos;
+                    }
+                    break;
+            }
+        }
+        result.push(lineStart);
+        return result;
+    }
+    ts.computeLineStarts = computeLineStarts;
+    function getPositionOfLineAndCharacter(sourceFile, line, character) {
+        return computePositionOfLineAndCharacter(getLineStarts(sourceFile), line, character);
+    }
+    ts.getPositionOfLineAndCharacter = getPositionOfLineAndCharacter;
+    /* @internal */
+    function computePositionOfLineAndCharacter(lineStarts, line, character) {
+        ts.Debug.assert(line >= 0 && line < lineStarts.length);
+        return lineStarts[line] + character;
+    }
+    ts.computePositionOfLineAndCharacter = computePositionOfLineAndCharacter;
+    /* @internal */
+    function getLineStarts(sourceFile) {
+        return sourceFile.lineMap || (sourceFile.lineMap = computeLineStarts(sourceFile.text));
+    }
+    ts.getLineStarts = getLineStarts;
+    /* @internal */
+    /**
+     * We assume the first line starts at position 0 and 'position' is non-negative.
+     */
+    function computeLineAndCharacterOfPosition(lineStarts, position) {
+        var lineNumber = ts.binarySearch(lineStarts, position);
+        if (lineNumber < 0) {
+            // If the actual position was not found,
+            // the binary search returns the 2's-complement of the next line start
+            // e.g. if the line starts at [5, 10, 23, 80] and the position requested was 20
+            // then the search will return -2.
+            //
+            // We want the index of the previous line start, so we subtract 1.
+            // Review 2's-complement if this is confusing.
+            lineNumber = ~lineNumber - 1;
+            ts.Debug.assert(lineNumber !== -1, "position cannot precede the beginning of the file");
+        }
+        return {
+            line: lineNumber,
+            character: position - lineStarts[lineNumber]
+        };
+    }
+    ts.computeLineAndCharacterOfPosition = computeLineAndCharacterOfPosition;
+    function getLineAndCharacterOfPosition(sourceFile, position) {
+        return computeLineAndCharacterOfPosition(getLineStarts(sourceFile), position);
+    }
+    ts.getLineAndCharacterOfPosition = getLineAndCharacterOfPosition;
+    var hasOwnProperty = Object.prototype.hasOwnProperty;
+    function isWhiteSpace(ch) {
+        // Note: nextLine is in the Zs space, and should be considered to be a whitespace.
+        // It is explicitly not a line-break as it isn't in the exact set specified by EcmaScript.
+        return ch === 32 /* space */ ||
+            ch === 9 /* tab */ ||
+            ch === 11 /* verticalTab */ ||
+            ch === 12 /* formFeed */ ||
+            ch === 160 /* nonBreakingSpace */ ||
+            ch === 133 /* nextLine */ ||
+            ch === 5760 /* ogham */ ||
+            ch >= 8192 /* enQuad */ && ch <= 8203 /* zeroWidthSpace */ ||
+            ch === 8239 /* narrowNoBreakSpace */ ||
+            ch === 8287 /* mathematicalSpace */ ||
+            ch === 12288 /* ideographicSpace */ ||
+            ch === 65279 /* byteOrderMark */;
+    }
+    ts.isWhiteSpace = isWhiteSpace;
+    function isLineBreak(ch) {
+        // ES5 7.3:
+        // The ECMAScript line terminator characters are listed in Table 3.
+        //     Table 3: Line Terminator Characters
+        //     Code Unit Value     Name                    Formal Name
+        //     \u000A              Line Feed               <LF>
+        //     \u000D              Carriage Return         <CR>
+        //     \u2028              Line separator          <LS>
+        //     \u2029              Paragraph separator     <PS>
+        // Only the characters in Table 3 are treated as line terminators. Other new line or line
+        // breaking characters are treated as white space but not as line terminators.
+        return ch === 10 /* lineFeed */ ||
+            ch === 13 /* carriageReturn */ ||
+            ch === 8232 /* lineSeparator */ ||
+            ch === 8233 /* paragraphSeparator */;
+    }
+    ts.isLineBreak = isLineBreak;
+    function isDigit(ch) {
+        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
+    }
+    /* @internal */
+    function isOctalDigit(ch) {
+        return ch >= 48 /* _0 */ && ch <= 55 /* _7 */;
+    }
+    ts.isOctalDigit = isOctalDigit;
+    function couldStartTrivia(text, pos) {
+        // Keep in sync with skipTrivia
+        var ch = text.charCodeAt(pos);
+        switch (ch) {
+            case 13 /* carriageReturn */:
+            case 10 /* lineFeed */:
+            case 9 /* tab */:
+            case 11 /* verticalTab */:
+            case 12 /* formFeed */:
+            case 32 /* space */:
+            case 47 /* slash */:
+            // starts of normal trivia
+            case 60 /* lessThan */:
+            case 61 /* equals */:
+            case 62 /* greaterThan */:
+                // Starts of conflict marker trivia
+                return true;
+            case 35 /* hash */:
+                // Only if its the beginning can we have #! trivia
+                return pos === 0;
+            default:
+                return ch > 127 /* maxAsciiCharacter */;
+        }
+    }
+    ts.couldStartTrivia = couldStartTrivia;
+    /* @internal */
+    function skipTrivia(text, pos, stopAfterLineBreak, stopAtComments) {
+        if (stopAtComments === void 0) { stopAtComments = false; }
+        // Using ! with a greater than test is a fast way of testing the following conditions:
+        //  pos === undefined || pos === null || isNaN(pos) || pos < 0;
+        if (!(pos >= 0)) {
+            return pos;
+        }
+        // Keep in sync with couldStartTrivia
+        while (true) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13 /* carriageReturn */:
+                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                case 10 /* lineFeed */:
+                    pos++;
+                    if (stopAfterLineBreak) {
+                        return pos;
+                    }
+                    continue;
+                case 9 /* tab */:
+                case 11 /* verticalTab */:
+                case 12 /* formFeed */:
+                case 32 /* space */:
+                    pos++;
+                    continue;
+                case 47 /* slash */:
+                    if (stopAtComments) {
+                        break;
+                    }
+                    if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (isLineBreak(text.charCodeAt(pos))) {
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                        pos += 2;
+                        while (pos < text.length) {
+                            if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                pos += 2;
+                                break;
+                            }
+                            pos++;
+                        }
+                        continue;
+                    }
+                    break;
+                case 60 /* lessThan */:
+                case 61 /* equals */:
+                case 62 /* greaterThan */:
+                    if (isConflictMarkerTrivia(text, pos)) {
+                        pos = scanConflictMarkerTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                case 35 /* hash */:
+                    if (pos === 0 && isShebangTrivia(text, pos)) {
+                        pos = scanShebangTrivia(text, pos);
+                        continue;
+                    }
+                    break;
+                default:
+                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpace(ch) || isLineBreak(ch))) {
+                        pos++;
+                        continue;
+                    }
+                    break;
+            }
+            return pos;
+        }
+    }
+    ts.skipTrivia = skipTrivia;
+    // All conflict markers consist of the same character repeated seven times.  If it is
+    // a <<<<<<< or >>>>>>> marker then it is also followed by a space.
+    var mergeConflictMarkerLength = "<<<<<<<".length;
+    function isConflictMarkerTrivia(text, pos) {
+        ts.Debug.assert(pos >= 0);
+        // Conflict markers must be at the start of a line.
+        if (pos === 0 || isLineBreak(text.charCodeAt(pos - 1))) {
+            var ch = text.charCodeAt(pos);
+            if ((pos + mergeConflictMarkerLength) < text.length) {
+                for (var i = 0, n = mergeConflictMarkerLength; i < n; i++) {
+                    if (text.charCodeAt(pos + i) !== ch) {
+                        return false;
+                    }
+                }
+                return ch === 61 /* equals */ ||
+                    text.charCodeAt(pos + mergeConflictMarkerLength) === 32 /* space */;
+            }
+        }
+        return false;
+    }
+    function scanConflictMarkerTrivia(text, pos, error) {
+        if (error) {
+            error(ts.Diagnostics.Merge_conflict_marker_encountered, mergeConflictMarkerLength);
+        }
+        var ch = text.charCodeAt(pos);
+        var len = text.length;
+        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
+            while (pos < len && !isLineBreak(text.charCodeAt(pos))) {
+                pos++;
+            }
+        }
+        else {
+            ts.Debug.assert(ch === 61 /* equals */);
+            // Consume everything from the start of the mid-conflict marker to the start of the next
+            // end-conflict marker.
+            while (pos < len) {
+                var ch_1 = text.charCodeAt(pos);
+                if (ch_1 === 62 /* greaterThan */ && isConflictMarkerTrivia(text, pos)) {
+                    break;
+                }
+                pos++;
+            }
+        }
+        return pos;
+    }
+    var shebangTriviaRegex = /^#!.*/;
+    function isShebangTrivia(text, pos) {
+        // Shebangs check must only be done at the start of the file
+        ts.Debug.assert(pos === 0);
+        return shebangTriviaRegex.test(text);
+    }
+    function scanShebangTrivia(text, pos) {
+        var shebang = shebangTriviaRegex.exec(text)[0];
+        pos = pos + shebang.length;
+        return pos;
+    }
+    /**
+     * Extract comments from text prefixing the token closest following `pos`.
+     * The return value is an array containing a TextRange for each comment.
+     * Single-line comment ranges include the beginning '//' characters but not the ending line break.
+     * Multi - line comment ranges include the beginning '/* and ending '<asterisk>/' characters.
+     * The return value is undefined if no comments were found.
+     * @param trailing
+     * If false, whitespace is skipped until the first line break and comments between that location
+     * and the next token are returned.
+     * If true, comments occurring between the given position and the next line break are returned.
+     */
+    function getCommentRanges(text, pos, trailing) {
+        var result;
+        var collecting = trailing || pos === 0;
+        while (pos < text.length) {
+            var ch = text.charCodeAt(pos);
+            switch (ch) {
+                case 13 /* carriageReturn */:
+                    if (text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                case 10 /* lineFeed */:
+                    pos++;
+                    if (trailing) {
+                        return result;
+                    }
+                    collecting = true;
+                    if (result && result.length) {
+                        ts.lastOrUndefined(result).hasTrailingNewLine = true;
+                    }
+                    continue;
+                case 9 /* tab */:
+                case 11 /* verticalTab */:
+                case 12 /* formFeed */:
+                case 32 /* space */:
+                    pos++;
+                    continue;
+                case 47 /* slash */:
+                    var nextChar = text.charCodeAt(pos + 1);
+                    var hasTrailingNewLine = false;
+                    if (nextChar === 47 /* slash */ || nextChar === 42 /* asterisk */) {
+                        var kind = nextChar === 47 /* slash */ ? 2 /* SingleLineCommentTrivia */ : 3 /* MultiLineCommentTrivia */;
+                        var startPos = pos;
+                        pos += 2;
+                        if (nextChar === 47 /* slash */) {
+                            while (pos < text.length) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    hasTrailingNewLine = true;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        else {
+                            while (pos < text.length) {
+                                if (text.charCodeAt(pos) === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                    pos += 2;
+                                    break;
+                                }
+                                pos++;
+                            }
+                        }
+                        if (collecting) {
+                            if (!result) {
+                                result = [];
+                            }
+                            result.push({ pos: startPos, end: pos, hasTrailingNewLine: hasTrailingNewLine, kind: kind });
+                        }
+                        continue;
+                    }
+                    break;
+                default:
+                    if (ch > 127 /* maxAsciiCharacter */ && (isWhiteSpace(ch) || isLineBreak(ch))) {
+                        if (result && result.length && isLineBreak(ch)) {
+                            ts.lastOrUndefined(result).hasTrailingNewLine = true;
+                        }
+                        pos++;
+                        continue;
+                    }
+                    break;
+            }
+            return result;
+        }
+        return result;
+    }
+    function getLeadingCommentRanges(text, pos) {
+        return getCommentRanges(text, pos, /*trailing*/ false);
+    }
+    ts.getLeadingCommentRanges = getLeadingCommentRanges;
+    function getTrailingCommentRanges(text, pos) {
+        return getCommentRanges(text, pos, /*trailing*/ true);
+    }
+    ts.getTrailingCommentRanges = getTrailingCommentRanges;
+    /** Optionally, get the shebang */
+    function getShebang(text) {
+        return shebangTriviaRegex.test(text)
+            ? shebangTriviaRegex.exec(text)[0]
+            : undefined;
+    }
+    ts.getShebang = getShebang;
+    function isIdentifierStart(ch, languageVersion) {
+        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
+            ch === 36 /* $ */ || ch === 95 /* _ */ ||
+            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierStart(ch, languageVersion);
+    }
+    ts.isIdentifierStart = isIdentifierStart;
+    function isIdentifierPart(ch, languageVersion) {
+        return ch >= 65 /* A */ && ch <= 90 /* Z */ || ch >= 97 /* a */ && ch <= 122 /* z */ ||
+            ch >= 48 /* _0 */ && ch <= 57 /* _9 */ || ch === 36 /* $ */ || ch === 95 /* _ */ ||
+            ch > 127 /* maxAsciiCharacter */ && isUnicodeIdentifierPart(ch, languageVersion);
+    }
+    ts.isIdentifierPart = isIdentifierPart;
+    /* @internal */
+    function isIdentifier(name, languageVersion) {
+        if (!isIdentifierStart(name.charCodeAt(0), languageVersion)) {
+            return false;
+        }
+        for (var i = 1, n = name.length; i < n; i++) {
+            if (!isIdentifierPart(name.charCodeAt(i), languageVersion)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.isIdentifier = isIdentifier;
+    // Creates a scanner over a (possibly unspecified) range of a piece of text.
+    function createScanner(languageVersion, skipTrivia, languageVariant, text, onError, start, length) {
+        if (languageVariant === void 0) { languageVariant = 0 /* Standard */; }
+        // Current position (end position of text of current token)
+        var pos;
+        // end of text
+        var end;
+        // Start position of whitespace before current token
+        var startPos;
+        // Start position of text of current token
+        var tokenPos;
+        var token;
+        var tokenValue;
+        var precedingLineBreak;
+        var hasExtendedUnicodeEscape;
+        var tokenIsUnterminated;
+        setText(text, start, length);
+        return {
+            getStartPos: function () { return startPos; },
+            getTextPos: function () { return pos; },
+            getToken: function () { return token; },
+            getTokenPos: function () { return tokenPos; },
+            getTokenText: function () { return text.substring(tokenPos, pos); },
+            getTokenValue: function () { return tokenValue; },
+            hasExtendedUnicodeEscape: function () { return hasExtendedUnicodeEscape; },
+            hasPrecedingLineBreak: function () { return precedingLineBreak; },
+            isIdentifier: function () { return token === 69 /* Identifier */ || token > 105 /* LastReservedWord */; },
+            isReservedWord: function () { return token >= 70 /* FirstReservedWord */ && token <= 105 /* LastReservedWord */; },
+            isUnterminated: function () { return tokenIsUnterminated; },
+            reScanGreaterToken: reScanGreaterToken,
+            reScanSlashToken: reScanSlashToken,
+            reScanTemplateToken: reScanTemplateToken,
+            scanJsxIdentifier: scanJsxIdentifier,
+            reScanJsxToken: reScanJsxToken,
+            scanJsxToken: scanJsxToken,
+            scanJSDocToken: scanJSDocToken,
+            scan: scan,
+            setText: setText,
+            setScriptTarget: setScriptTarget,
+            setLanguageVariant: setLanguageVariant,
+            setOnError: setOnError,
+            setTextPos: setTextPos,
+            tryScan: tryScan,
+            lookAhead: lookAhead,
+            scanRange: scanRange
+        };
+        function error(message, length) {
+            if (onError) {
+                onError(message, length || 0);
+            }
+        }
+        function scanNumber() {
+            var start = pos;
+            while (isDigit(text.charCodeAt(pos)))
+                pos++;
+            if (text.charCodeAt(pos) === 46 /* dot */) {
+                pos++;
+                while (isDigit(text.charCodeAt(pos)))
+                    pos++;
+            }
+            var end = pos;
+            if (text.charCodeAt(pos) === 69 /* E */ || text.charCodeAt(pos) === 101 /* e */) {
+                pos++;
+                if (text.charCodeAt(pos) === 43 /* plus */ || text.charCodeAt(pos) === 45 /* minus */)
+                    pos++;
+                if (isDigit(text.charCodeAt(pos))) {
+                    pos++;
+                    while (isDigit(text.charCodeAt(pos)))
+                        pos++;
+                    end = pos;
+                }
+                else {
+                    error(ts.Diagnostics.Digit_expected);
+                }
+            }
+            return "" + +(text.substring(start, end));
+        }
+        function scanOctalDigits() {
+            var start = pos;
+            while (isOctalDigit(text.charCodeAt(pos))) {
+                pos++;
+            }
+            return +(text.substring(start, pos));
+        }
+        /**
+         * Scans the given number of hexadecimal digits in the text,
+         * returning -1 if the given number is unavailable.
+         */
+        function scanExactNumberOfHexDigits(count) {
+            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ false);
+        }
+        /**
+         * Scans as many hexadecimal digits as are available in the text,
+         * returning -1 if the given number of digits was unavailable.
+         */
+        function scanMinimumNumberOfHexDigits(count) {
+            return scanHexDigits(/*minCount*/ count, /*scanAsManyAsPossible*/ true);
+        }
+        function scanHexDigits(minCount, scanAsManyAsPossible) {
+            var digits = 0;
+            var value = 0;
+            while (digits < minCount || scanAsManyAsPossible) {
+                var ch = text.charCodeAt(pos);
+                if (ch >= 48 /* _0 */ && ch <= 57 /* _9 */) {
+                    value = value * 16 + ch - 48 /* _0 */;
+                }
+                else if (ch >= 65 /* A */ && ch <= 70 /* F */) {
+                    value = value * 16 + ch - 65 /* A */ + 10;
+                }
+                else if (ch >= 97 /* a */ && ch <= 102 /* f */) {
+                    value = value * 16 + ch - 97 /* a */ + 10;
+                }
+                else {
+                    break;
+                }
+                pos++;
+                digits++;
+            }
+            if (digits < minCount) {
+                value = -1;
+            }
+            return value;
+        }
+        function scanString() {
+            var quote = text.charCodeAt(pos);
+            pos++;
+            var result = "";
+            var start = pos;
+            while (true) {
+                if (pos >= end) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                var ch = text.charCodeAt(pos);
+                if (ch === quote) {
+                    result += text.substring(start, pos);
+                    pos++;
+                    break;
+                }
+                if (ch === 92 /* backslash */) {
+                    result += text.substring(start, pos);
+                    result += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                if (isLineBreak(ch)) {
+                    result += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_string_literal);
+                    break;
+                }
+                pos++;
+            }
+            return result;
+        }
+        /**
+         * Sets the current 'tokenValue' and returns a NoSubstitutionTemplateLiteral or
+         * a literal component of a TemplateExpression.
+         */
+        function scanTemplateAndSetTokenValue() {
+            var startedWithBacktick = text.charCodeAt(pos) === 96 /* backtick */;
+            pos++;
+            var start = pos;
+            var contents = "";
+            var resultingToken;
+            while (true) {
+                if (pos >= end) {
+                    contents += text.substring(start, pos);
+                    tokenIsUnterminated = true;
+                    error(ts.Diagnostics.Unterminated_template_literal);
+                    resultingToken = startedWithBacktick ? 11 /* NoSubstitutionTemplateLiteral */ : 14 /* TemplateTail */;
+                    break;
+                }
+                var currChar = text.charCodeAt(pos);
+                // '`'
+                if (currChar === 96 /* backtick */) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    resultingToken = startedWithBacktick ? 11 /* NoSubstitutionTemplateLiteral */ : 14 /* TemplateTail */;
+                    break;
+                }
+                // '${'
+                if (currChar === 36 /* $ */ && pos + 1 < end && text.charCodeAt(pos + 1) === 123 /* openBrace */) {
+                    contents += text.substring(start, pos);
+                    pos += 2;
+                    resultingToken = startedWithBacktick ? 12 /* TemplateHead */ : 13 /* TemplateMiddle */;
+                    break;
+                }
+                // Escape character
+                if (currChar === 92 /* backslash */) {
+                    contents += text.substring(start, pos);
+                    contents += scanEscapeSequence();
+                    start = pos;
+                    continue;
+                }
+                // Speculated ECMAScript 6 Spec 11.8.6.1:
+                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for Template Values
+                if (currChar === 13 /* carriageReturn */) {
+                    contents += text.substring(start, pos);
+                    pos++;
+                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                    contents += "\n";
+                    start = pos;
+                    continue;
+                }
+                pos++;
+            }
+            ts.Debug.assert(resultingToken !== undefined);
+            tokenValue = contents;
+            return resultingToken;
+        }
+        function scanEscapeSequence() {
+            pos++;
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                return "";
+            }
+            var ch = text.charCodeAt(pos);
+            pos++;
+            switch (ch) {
+                case 48 /* _0 */:
+                    return "\0";
+                case 98 /* b */:
+                    return "\b";
+                case 116 /* t */:
+                    return "\t";
+                case 110 /* n */:
+                    return "\n";
+                case 118 /* v */:
+                    return "\v";
+                case 102 /* f */:
+                    return "\f";
+                case 114 /* r */:
+                    return "\r";
+                case 39 /* singleQuote */:
+                    return "\'";
+                case 34 /* doubleQuote */:
+                    return "\"";
+                case 117 /* u */:
+                    // '\u{DDDDDDDD}'
+                    if (pos < end && text.charCodeAt(pos) === 123 /* openBrace */) {
+                        hasExtendedUnicodeEscape = true;
+                        pos++;
+                        return scanExtendedUnicodeEscape();
+                    }
+                    // '\uDDDD'
+                    return scanHexadecimalEscape(/*numDigits*/ 4);
+                case 120 /* x */:
+                    // '\xDD'
+                    return scanHexadecimalEscape(/*numDigits*/ 2);
+                // when encountering a LineContinuation (i.e. a backslash and a line terminator sequence),
+                // the line terminator is interpreted to be "the empty code unit sequence".
+                case 13 /* carriageReturn */:
+                    if (pos < end && text.charCodeAt(pos) === 10 /* lineFeed */) {
+                        pos++;
+                    }
+                // fall through
+                case 10 /* lineFeed */:
+                case 8232 /* lineSeparator */:
+                case 8233 /* paragraphSeparator */:
+                    return "";
+                default:
+                    return String.fromCharCode(ch);
+            }
+        }
+        function scanHexadecimalEscape(numDigits) {
+            var escapedValue = scanExactNumberOfHexDigits(numDigits);
+            if (escapedValue >= 0) {
+                return String.fromCharCode(escapedValue);
+            }
+            else {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                return "";
+            }
+        }
+        function scanExtendedUnicodeEscape() {
+            var escapedValue = scanMinimumNumberOfHexDigits(1);
+            var isInvalidExtendedEscape = false;
+            // Validate the value of the digit
+            if (escapedValue < 0) {
+                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                isInvalidExtendedEscape = true;
+            }
+            else if (escapedValue > 0x10FFFF) {
+                error(ts.Diagnostics.An_extended_Unicode_escape_value_must_be_between_0x0_and_0x10FFFF_inclusive);
+                isInvalidExtendedEscape = true;
+            }
+            if (pos >= end) {
+                error(ts.Diagnostics.Unexpected_end_of_text);
+                isInvalidExtendedEscape = true;
+            }
+            else if (text.charCodeAt(pos) === 125 /* closeBrace */) {
+                // Only swallow the following character up if it's a '}'.
+                pos++;
+            }
+            else {
+                error(ts.Diagnostics.Unterminated_Unicode_escape_sequence);
+                isInvalidExtendedEscape = true;
+            }
+            if (isInvalidExtendedEscape) {
+                return "";
+            }
+            return utf16EncodeAsString(escapedValue);
+        }
+        // Derived from the 10.1.1 UTF16Encoding of the ES6 Spec.
+        function utf16EncodeAsString(codePoint) {
+            ts.Debug.assert(0x0 <= codePoint && codePoint <= 0x10FFFF);
+            if (codePoint <= 65535) {
+                return String.fromCharCode(codePoint);
+            }
+            var codeUnit1 = Math.floor((codePoint - 65536) / 1024) + 0xD800;
+            var codeUnit2 = ((codePoint - 65536) % 1024) + 0xDC00;
+            return String.fromCharCode(codeUnit1, codeUnit2);
+        }
+        // Current character is known to be a backslash. Check for Unicode escape of the form '\uXXXX'
+        // and return code point value if valid Unicode escape is found. Otherwise return -1.
+        function peekUnicodeEscape() {
+            if (pos + 5 < end && text.charCodeAt(pos + 1) === 117 /* u */) {
+                var start_1 = pos;
+                pos += 2;
+                var value = scanExactNumberOfHexDigits(4);
+                pos = start_1;
+                return value;
+            }
+            return -1;
+        }
+        function scanIdentifierParts() {
+            var result = "";
+            var start = pos;
+            while (pos < end) {
+                var ch = text.charCodeAt(pos);
+                if (isIdentifierPart(ch, languageVersion)) {
+                    pos++;
+                }
+                else if (ch === 92 /* backslash */) {
+                    ch = peekUnicodeEscape();
+                    if (!(ch >= 0 && isIdentifierPart(ch, languageVersion))) {
+                        break;
+                    }
+                    result += text.substring(start, pos);
+                    result += String.fromCharCode(ch);
+                    // Valid Unicode escape is always six characters
+                    pos += 6;
+                    start = pos;
+                }
+                else {
+                    break;
+                }
+            }
+            result += text.substring(start, pos);
+            return result;
+        }
+        function getIdentifierToken() {
+            // Reserved words are between 2 and 11 characters long and start with a lowercase letter
+            var len = tokenValue.length;
+            if (len >= 2 && len <= 11) {
+                var ch = tokenValue.charCodeAt(0);
+                if (ch >= 97 /* a */ && ch <= 122 /* z */ && hasOwnProperty.call(textToToken, tokenValue)) {
+                    return token = textToToken[tokenValue];
+                }
+            }
+            return token = 69 /* Identifier */;
+        }
+        function scanBinaryOrOctalDigits(base) {
+            ts.Debug.assert(base !== 2 || base !== 8, "Expected either base 2 or base 8");
+            var value = 0;
+            // For counting number of digits; Valid binaryIntegerLiteral must have at least one binary digit following B or b.
+            // Similarly valid octalIntegerLiteral must have at least one octal digit following o or O.
+            var numberOfDigits = 0;
+            while (true) {
+                var ch = text.charCodeAt(pos);
+                var valueOfCh = ch - 48 /* _0 */;
+                if (!isDigit(ch) || valueOfCh >= base) {
+                    break;
+                }
+                value = value * base + valueOfCh;
+                pos++;
+                numberOfDigits++;
+            }
+            // Invalid binaryIntegerLiteral or octalIntegerLiteral
+            if (numberOfDigits === 0) {
+                return -1;
+            }
+            return value;
+        }
+        function scan() {
+            startPos = pos;
+            hasExtendedUnicodeEscape = false;
+            precedingLineBreak = false;
+            tokenIsUnterminated = false;
+            while (true) {
+                tokenPos = pos;
+                if (pos >= end) {
+                    return token = 1 /* EndOfFileToken */;
+                }
+                var ch = text.charCodeAt(pos);
+                // Special handling for shebang
+                if (ch === 35 /* hash */ && pos === 0 && isShebangTrivia(text, pos)) {
+                    pos = scanShebangTrivia(text, pos);
+                    if (skipTrivia) {
+                        continue;
+                    }
+                    else {
+                        return token = 6 /* ShebangTrivia */;
+                    }
+                }
+                switch (ch) {
+                    case 10 /* lineFeed */:
+                    case 13 /* carriageReturn */:
+                        precedingLineBreak = true;
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            if (ch === 13 /* carriageReturn */ && pos + 1 < end && text.charCodeAt(pos + 1) === 10 /* lineFeed */) {
+                                // consume both CR and LF
+                                pos += 2;
+                            }
+                            else {
+                                pos++;
+                            }
+                            return token = 4 /* NewLineTrivia */;
+                        }
+                    case 9 /* tab */:
+                    case 11 /* verticalTab */:
+                    case 12 /* formFeed */:
+                    case 32 /* space */:
+                        if (skipTrivia) {
+                            pos++;
+                            continue;
+                        }
+                        else {
+                            while (pos < end && isWhiteSpace(text.charCodeAt(pos))) {
+                                pos++;
+                            }
+                            return token = 5 /* WhitespaceTrivia */;
+                        }
+                    case 33 /* exclamation */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 33 /* ExclamationEqualsEqualsToken */;
+                            }
+                            return pos += 2, token = 31 /* ExclamationEqualsToken */;
+                        }
+                        pos++;
+                        return token = 49 /* ExclamationToken */;
+                    case 34 /* doubleQuote */:
+                    case 39 /* singleQuote */:
+                        tokenValue = scanString();
+                        return token = 9 /* StringLiteral */;
+                    case 96 /* backtick */:
+                        return token = scanTemplateAndSetTokenValue();
+                    case 37 /* percent */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 62 /* PercentEqualsToken */;
+                        }
+                        pos++;
+                        return token = 40 /* PercentToken */;
+                    case 38 /* ampersand */:
+                        if (text.charCodeAt(pos + 1) === 38 /* ampersand */) {
+                            return pos += 2, token = 51 /* AmpersandAmpersandToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 66 /* AmpersandEqualsToken */;
+                        }
+                        pos++;
+                        return token = 46 /* AmpersandToken */;
+                    case 40 /* openParen */:
+                        pos++;
+                        return token = 17 /* OpenParenToken */;
+                    case 41 /* closeParen */:
+                        pos++;
+                        return token = 18 /* CloseParenToken */;
+                    case 42 /* asterisk */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 59 /* AsteriskEqualsToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 60 /* AsteriskAsteriskEqualsToken */;
+                            }
+                            return pos += 2, token = 38 /* AsteriskAsteriskToken */;
+                        }
+                        pos++;
+                        return token = 37 /* AsteriskToken */;
+                    case 43 /* plus */:
+                        if (text.charCodeAt(pos + 1) === 43 /* plus */) {
+                            return pos += 2, token = 41 /* PlusPlusToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 57 /* PlusEqualsToken */;
+                        }
+                        pos++;
+                        return token = 35 /* PlusToken */;
+                    case 44 /* comma */:
+                        pos++;
+                        return token = 24 /* CommaToken */;
+                    case 45 /* minus */:
+                        if (text.charCodeAt(pos + 1) === 45 /* minus */) {
+                            return pos += 2, token = 42 /* MinusMinusToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 58 /* MinusEqualsToken */;
+                        }
+                        pos++;
+                        return token = 36 /* MinusToken */;
+                    case 46 /* dot */:
+                        if (isDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = scanNumber();
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 46 /* dot */ && text.charCodeAt(pos + 2) === 46 /* dot */) {
+                            return pos += 3, token = 22 /* DotDotDotToken */;
+                        }
+                        pos++;
+                        return token = 21 /* DotToken */;
+                    case 47 /* slash */:
+                        // Single-line comment
+                        if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                            pos += 2;
+                            while (pos < end) {
+                                if (isLineBreak(text.charCodeAt(pos))) {
+                                    break;
+                                }
+                                pos++;
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 2 /* SingleLineCommentTrivia */;
+                            }
+                        }
+                        // Multi-line comment
+                        if (text.charCodeAt(pos + 1) === 42 /* asterisk */) {
+                            pos += 2;
+                            var commentClosed = false;
+                            while (pos < end) {
+                                var ch_2 = text.charCodeAt(pos);
+                                if (ch_2 === 42 /* asterisk */ && text.charCodeAt(pos + 1) === 47 /* slash */) {
+                                    pos += 2;
+                                    commentClosed = true;
+                                    break;
+                                }
+                                if (isLineBreak(ch_2)) {
+                                    precedingLineBreak = true;
+                                }
+                                pos++;
+                            }
+                            if (!commentClosed) {
+                                error(ts.Diagnostics.Asterisk_Slash_expected);
+                            }
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                tokenIsUnterminated = !commentClosed;
+                                return token = 3 /* MultiLineCommentTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 61 /* SlashEqualsToken */;
+                        }
+                        pos++;
+                        return token = 39 /* SlashToken */;
+                    case 48 /* _0 */:
+                        if (pos + 2 < end && (text.charCodeAt(pos + 1) === 88 /* X */ || text.charCodeAt(pos + 1) === 120 /* x */)) {
+                            pos += 2;
+                            var value = scanMinimumNumberOfHexDigits(1);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Hexadecimal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 66 /* B */ || text.charCodeAt(pos + 1) === 98 /* b */)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(/* base */ 2);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Binary_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        else if (pos + 2 < end && (text.charCodeAt(pos + 1) === 79 /* O */ || text.charCodeAt(pos + 1) === 111 /* o */)) {
+                            pos += 2;
+                            var value = scanBinaryOrOctalDigits(/* base */ 8);
+                            if (value < 0) {
+                                error(ts.Diagnostics.Octal_digit_expected);
+                                value = 0;
+                            }
+                            tokenValue = "" + value;
+                            return token = 8 /* NumericLiteral */;
+                        }
+                        // Try to parse as an octal
+                        if (pos + 1 < end && isOctalDigit(text.charCodeAt(pos + 1))) {
+                            tokenValue = "" + scanOctalDigits();
+                            return token = 8 /* NumericLiteral */;
+                        }
+                    // This fall-through is a deviation from the EcmaScript grammar. The grammar says that a leading zero
+                    // can only be followed by an octal digit, a dot, or the end of the number literal. However, we are being
+                    // permissive and allowing decimal digits of the form 08* and 09* (which many browsers also do).
+                    case 49 /* _1 */:
+                    case 50 /* _2 */:
+                    case 51 /* _3 */:
+                    case 52 /* _4 */:
+                    case 53 /* _5 */:
+                    case 54 /* _6 */:
+                    case 55 /* _7 */:
+                    case 56 /* _8 */:
+                    case 57 /* _9 */:
+                        tokenValue = scanNumber();
+                        return token = 8 /* NumericLiteral */;
+                    case 58 /* colon */:
+                        pos++;
+                        return token = 54 /* ColonToken */;
+                    case 59 /* semicolon */:
+                        pos++;
+                        return token = 23 /* SemicolonToken */;
+                    case 60 /* lessThan */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 60 /* lessThan */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 63 /* LessThanLessThanEqualsToken */;
+                            }
+                            return pos += 2, token = 43 /* LessThanLessThanToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 28 /* LessThanEqualsToken */;
+                        }
+                        if (languageVariant === 1 /* JSX */ &&
+                            text.charCodeAt(pos + 1) === 47 /* slash */ &&
+                            text.charCodeAt(pos + 2) !== 42 /* asterisk */) {
+                            return pos += 2, token = 26 /* LessThanSlashToken */;
+                        }
+                        pos++;
+                        return token = 25 /* LessThanToken */;
+                    case 61 /* equals */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                                return pos += 3, token = 32 /* EqualsEqualsEqualsToken */;
+                            }
+                            return pos += 2, token = 30 /* EqualsEqualsToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
+                            return pos += 2, token = 34 /* EqualsGreaterThanToken */;
+                        }
+                        pos++;
+                        return token = 56 /* EqualsToken */;
+                    case 62 /* greaterThan */:
+                        if (isConflictMarkerTrivia(text, pos)) {
+                            pos = scanConflictMarkerTrivia(text, pos, error);
+                            if (skipTrivia) {
+                                continue;
+                            }
+                            else {
+                                return token = 7 /* ConflictMarkerTrivia */;
+                            }
+                        }
+                        pos++;
+                        return token = 27 /* GreaterThanToken */;
+                    case 63 /* question */:
+                        pos++;
+                        return token = 53 /* QuestionToken */;
+                    case 91 /* openBracket */:
+                        pos++;
+                        return token = 19 /* OpenBracketToken */;
+                    case 93 /* closeBracket */:
+                        pos++;
+                        return token = 20 /* CloseBracketToken */;
+                    case 94 /* caret */:
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 68 /* CaretEqualsToken */;
+                        }
+                        pos++;
+                        return token = 48 /* CaretToken */;
+                    case 123 /* openBrace */:
+                        pos++;
+                        return token = 15 /* OpenBraceToken */;
+                    case 124 /* bar */:
+                        if (text.charCodeAt(pos + 1) === 124 /* bar */) {
+                            return pos += 2, token = 52 /* BarBarToken */;
+                        }
+                        if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                            return pos += 2, token = 67 /* BarEqualsToken */;
+                        }
+                        pos++;
+                        return token = 47 /* BarToken */;
+                    case 125 /* closeBrace */:
+                        pos++;
+                        return token = 16 /* CloseBraceToken */;
+                    case 126 /* tilde */:
+                        pos++;
+                        return token = 50 /* TildeToken */;
+                    case 64 /* at */:
+                        pos++;
+                        return token = 55 /* AtToken */;
+                    case 92 /* backslash */:
+                        var cookedChar = peekUnicodeEscape();
+                        if (cookedChar >= 0 && isIdentifierStart(cookedChar, languageVersion)) {
+                            pos += 6;
+                            tokenValue = String.fromCharCode(cookedChar) + scanIdentifierParts();
+                            return token = getIdentifierToken();
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0 /* Unknown */;
+                    default:
+                        if (isIdentifierStart(ch, languageVersion)) {
+                            pos++;
+                            while (pos < end && isIdentifierPart(ch = text.charCodeAt(pos), languageVersion))
+                                pos++;
+                            tokenValue = text.substring(tokenPos, pos);
+                            if (ch === 92 /* backslash */) {
+                                tokenValue += scanIdentifierParts();
+                            }
+                            return token = getIdentifierToken();
+                        }
+                        else if (isWhiteSpace(ch)) {
+                            pos++;
+                            continue;
+                        }
+                        else if (isLineBreak(ch)) {
+                            precedingLineBreak = true;
+                            pos++;
+                            continue;
+                        }
+                        error(ts.Diagnostics.Invalid_character);
+                        pos++;
+                        return token = 0 /* Unknown */;
+                }
+            }
+        }
+        function reScanGreaterToken() {
+            if (token === 27 /* GreaterThanToken */) {
+                if (text.charCodeAt(pos) === 62 /* greaterThan */) {
+                    if (text.charCodeAt(pos + 1) === 62 /* greaterThan */) {
+                        if (text.charCodeAt(pos + 2) === 61 /* equals */) {
+                            return pos += 3, token = 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */;
+                        }
+                        return pos += 2, token = 45 /* GreaterThanGreaterThanGreaterThanToken */;
+                    }
+                    if (text.charCodeAt(pos + 1) === 61 /* equals */) {
+                        return pos += 2, token = 64 /* GreaterThanGreaterThanEqualsToken */;
+                    }
+                    pos++;
+                    return token = 44 /* GreaterThanGreaterThanToken */;
+                }
+                if (text.charCodeAt(pos) === 61 /* equals */) {
+                    pos++;
+                    return token = 29 /* GreaterThanEqualsToken */;
+                }
+            }
+            return token;
+        }
+        function reScanSlashToken() {
+            if (token === 39 /* SlashToken */ || token === 61 /* SlashEqualsToken */) {
+                var p = tokenPos + 1;
+                var inEscape = false;
+                var inCharacterClass = false;
+                while (true) {
+                    // If we reach the end of a file, or hit a newline, then this is an unterminated
+                    // regex.  Report error and return what we have so far.
+                    if (p >= end) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    var ch = text.charCodeAt(p);
+                    if (isLineBreak(ch)) {
+                        tokenIsUnterminated = true;
+                        error(ts.Diagnostics.Unterminated_regular_expression_literal);
+                        break;
+                    }
+                    if (inEscape) {
+                        // Parsing an escape character;
+                        // reset the flag and just advance to the next char.
+                        inEscape = false;
+                    }
+                    else if (ch === 47 /* slash */ && !inCharacterClass) {
+                        // A slash within a character class is permissible,
+                        // but in general it signals the end of the regexp literal.
+                        p++;
+                        break;
+                    }
+                    else if (ch === 91 /* openBracket */) {
+                        inCharacterClass = true;
+                    }
+                    else if (ch === 92 /* backslash */) {
+                        inEscape = true;
+                    }
+                    else if (ch === 93 /* closeBracket */) {
+                        inCharacterClass = false;
+                    }
+                    p++;
+                }
+                while (p < end && isIdentifierPart(text.charCodeAt(p), languageVersion)) {
+                    p++;
+                }
+                pos = p;
+                tokenValue = text.substring(tokenPos, pos);
+                token = 10 /* RegularExpressionLiteral */;
+            }
+            return token;
+        }
+        /**
+         * Unconditionally back up and scan a template expression portion.
+         */
+        function reScanTemplateToken() {
+            ts.Debug.assert(token === 16 /* CloseBraceToken */, "'reScanTemplateToken' should only be called on a '}'");
+            pos = tokenPos;
+            return token = scanTemplateAndSetTokenValue();
+        }
+        function reScanJsxToken() {
+            pos = tokenPos = startPos;
+            return token = scanJsxToken();
+        }
+        function scanJsxToken() {
+            startPos = tokenPos = pos;
+            if (pos >= end) {
+                return token = 1 /* EndOfFileToken */;
+            }
+            var char = text.charCodeAt(pos);
+            if (char === 60 /* lessThan */) {
+                if (text.charCodeAt(pos + 1) === 47 /* slash */) {
+                    pos += 2;
+                    return token = 26 /* LessThanSlashToken */;
+                }
+                pos++;
+                return token = 25 /* LessThanToken */;
+            }
+            if (char === 123 /* openBrace */) {
+                pos++;
+                return token = 15 /* OpenBraceToken */;
+            }
+            while (pos < end) {
+                pos++;
+                char = text.charCodeAt(pos);
+                if ((char === 123 /* openBrace */) || (char === 60 /* lessThan */)) {
+                    break;
+                }
+            }
+            return token = 244 /* JsxText */;
+        }
+        // Scans a JSX identifier; these differ from normal identifiers in that
+        // they allow dashes
+        function scanJsxIdentifier() {
+            if (tokenIsIdentifierOrKeyword(token)) {
+                var firstCharPosition = pos;
+                while (pos < end) {
+                    var ch = text.charCodeAt(pos);
+                    if (ch === 45 /* minus */ || ((firstCharPosition === pos) ? isIdentifierStart(ch, languageVersion) : isIdentifierPart(ch, languageVersion))) {
+                        pos++;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                tokenValue += text.substr(firstCharPosition, pos - firstCharPosition);
+            }
+            return token;
+        }
+        function scanJSDocToken() {
+            if (pos >= end) {
+                return token = 1 /* EndOfFileToken */;
+            }
+            startPos = pos;
+            // Eat leading whitespace
+            var ch = text.charCodeAt(pos);
+            while (pos < end) {
+                ch = text.charCodeAt(pos);
+                if (isWhiteSpace(ch)) {
+                    pos++;
+                }
+                else {
+                    break;
+                }
+            }
+            tokenPos = pos;
+            switch (ch) {
+                case 64 /* at */:
+                    return pos += 1, token = 55 /* AtToken */;
+                case 10 /* lineFeed */:
+                case 13 /* carriageReturn */:
+                    return pos += 1, token = 4 /* NewLineTrivia */;
+                case 42 /* asterisk */:
+                    return pos += 1, token = 37 /* AsteriskToken */;
+                case 123 /* openBrace */:
+                    return pos += 1, token = 15 /* OpenBraceToken */;
+                case 125 /* closeBrace */:
+                    return pos += 1, token = 16 /* CloseBraceToken */;
+                case 91 /* openBracket */:
+                    return pos += 1, token = 19 /* OpenBracketToken */;
+                case 93 /* closeBracket */:
+                    return pos += 1, token = 20 /* CloseBracketToken */;
+                case 61 /* equals */:
+                    return pos += 1, token = 56 /* EqualsToken */;
+                case 44 /* comma */:
+                    return pos += 1, token = 24 /* CommaToken */;
+            }
+            if (isIdentifierStart(ch, 2 /* Latest */)) {
+                pos++;
+                while (isIdentifierPart(text.charCodeAt(pos), 2 /* Latest */) && pos < end) {
+                    pos++;
+                }
+                return token = 69 /* Identifier */;
+            }
+            else {
+                return pos += 1, token = 0 /* Unknown */;
+            }
+        }
+        function speculationHelper(callback, isLookahead) {
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var saveTokenValue = tokenValue;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var result = callback();
+            // If our callback returned something 'falsy' or we're just looking ahead,
+            // then unconditionally restore us to where we were.
+            if (!result || isLookahead) {
+                pos = savePos;
+                startPos = saveStartPos;
+                tokenPos = saveTokenPos;
+                token = saveToken;
+                tokenValue = saveTokenValue;
+                precedingLineBreak = savePrecedingLineBreak;
+            }
+            return result;
+        }
+        function scanRange(start, length, callback) {
+            var saveEnd = end;
+            var savePos = pos;
+            var saveStartPos = startPos;
+            var saveTokenPos = tokenPos;
+            var saveToken = token;
+            var savePrecedingLineBreak = precedingLineBreak;
+            var saveTokenValue = tokenValue;
+            var saveHasExtendedUnicodeEscape = hasExtendedUnicodeEscape;
+            var saveTokenIsUnterminated = tokenIsUnterminated;
+            setText(text, start, length);
+            var result = callback();
+            end = saveEnd;
+            pos = savePos;
+            startPos = saveStartPos;
+            tokenPos = saveTokenPos;
+            token = saveToken;
+            precedingLineBreak = savePrecedingLineBreak;
+            tokenValue = saveTokenValue;
+            hasExtendedUnicodeEscape = saveHasExtendedUnicodeEscape;
+            tokenIsUnterminated = saveTokenIsUnterminated;
+            return result;
+        }
+        function lookAhead(callback) {
+            return speculationHelper(callback, /*isLookahead*/ true);
+        }
+        function tryScan(callback) {
+            return speculationHelper(callback, /*isLookahead*/ false);
+        }
+        function setText(newText, start, length) {
+            text = newText || "";
+            end = length === undefined ? text.length : start + length;
+            setTextPos(start || 0);
+        }
+        function setOnError(errorCallback) {
+            onError = errorCallback;
+        }
+        function setScriptTarget(scriptTarget) {
+            languageVersion = scriptTarget;
+        }
+        function setLanguageVariant(variant) {
+            languageVariant = variant;
+        }
+        function setTextPos(textPos) {
+            ts.Debug.assert(textPos >= 0);
+            pos = textPos;
+            startPos = textPos;
+            tokenPos = textPos;
+            token = 0 /* Unknown */;
+            precedingLineBreak = false;
+            tokenValue = undefined;
+            hasExtendedUnicodeEscape = false;
+            tokenIsUnterminated = false;
+        }
+    }
+    ts.createScanner = createScanner;
+})(ts || (ts = {}));
+/// <reference path="sys.ts" />
+/* @internal */
+var ts;
+(function (ts) {
+    function getDeclarationOfKind(symbol, kind) {
+        var declarations = symbol.declarations;
+        if (declarations) {
+            for (var _i = 0, declarations_1 = declarations; _i < declarations_1.length; _i++) {
+                var declaration = declarations_1[_i];
+                if (declaration.kind === kind) {
+                    return declaration;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getDeclarationOfKind = getDeclarationOfKind;
+    // Pool writers to avoid needing to allocate them for every symbol we write.
+    var stringWriters = [];
+    function getSingleLineStringWriter() {
+        if (stringWriters.length === 0) {
+            var str_1 = "";
+            var writeText = function (text) { return str_1 += text; };
+            return {
+                string: function () { return str_1; },
+                writeKeyword: writeText,
+                writeOperator: writeText,
+                writePunctuation: writeText,
+                writeSpace: writeText,
+                writeStringLiteral: writeText,
+                writeParameter: writeText,
+                writeSymbol: writeText,
+                // Completely ignore indentation for string writers.  And map newlines to
+                // a single space.
+                writeLine: function () { return str_1 += " "; },
+                increaseIndent: function () { },
+                decreaseIndent: function () { },
+                clear: function () { return str_1 = ""; },
+                trackSymbol: function () { },
+                reportInaccessibleThisError: function () { }
+            };
+        }
+        return stringWriters.pop();
+    }
+    ts.getSingleLineStringWriter = getSingleLineStringWriter;
+    function releaseStringWriter(writer) {
+        writer.clear();
+        stringWriters.push(writer);
+    }
+    ts.releaseStringWriter = releaseStringWriter;
+    function getFullWidth(node) {
+        return node.end - node.pos;
+    }
+    ts.getFullWidth = getFullWidth;
+    function mapIsEqualTo(map1, map2) {
+        if (!map1 || !map2) {
+            return map1 === map2;
+        }
+        return containsAll(map1, map2) && containsAll(map2, map1);
+    }
+    ts.mapIsEqualTo = mapIsEqualTo;
+    function containsAll(map, other) {
+        for (var key in map) {
+            if (!ts.hasProperty(map, key)) {
+                continue;
+            }
+            if (!ts.hasProperty(other, key) || map[key] !== other[key]) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function arrayIsEqualTo(array1, array2, equaler) {
+        if (!array1 || !array2) {
+            return array1 === array2;
+        }
+        if (array1.length !== array2.length) {
+            return false;
+        }
+        for (var i = 0; i < array1.length; i++) {
+            var equals = equaler ? equaler(array1[i], array2[i]) : array1[i] === array2[i];
+            if (!equals) {
+                return false;
+            }
+        }
+        return true;
+    }
+    ts.arrayIsEqualTo = arrayIsEqualTo;
+    function hasResolvedModule(sourceFile, moduleNameText) {
+        return sourceFile.resolvedModules && ts.hasProperty(sourceFile.resolvedModules, moduleNameText);
+    }
+    ts.hasResolvedModule = hasResolvedModule;
+    function getResolvedModule(sourceFile, moduleNameText) {
+        return hasResolvedModule(sourceFile, moduleNameText) ? sourceFile.resolvedModules[moduleNameText] : undefined;
+    }
+    ts.getResolvedModule = getResolvedModule;
+    function setResolvedModule(sourceFile, moduleNameText, resolvedModule) {
+        if (!sourceFile.resolvedModules) {
+            sourceFile.resolvedModules = {};
+        }
+        sourceFile.resolvedModules[moduleNameText] = resolvedModule;
+    }
+    ts.setResolvedModule = setResolvedModule;
+    function setResolvedTypeReferenceDirective(sourceFile, typeReferenceDirectiveName, resolvedTypeReferenceDirective) {
+        if (!sourceFile.resolvedTypeReferenceDirectiveNames) {
+            sourceFile.resolvedTypeReferenceDirectiveNames = {};
+        }
+        sourceFile.resolvedTypeReferenceDirectiveNames[typeReferenceDirectiveName] = resolvedTypeReferenceDirective;
+    }
+    ts.setResolvedTypeReferenceDirective = setResolvedTypeReferenceDirective;
+    /* @internal */
+    function moduleResolutionIsEqualTo(oldResolution, newResolution) {
+        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.isExternalLibraryImport === newResolution.isExternalLibraryImport;
+    }
+    ts.moduleResolutionIsEqualTo = moduleResolutionIsEqualTo;
+    /* @internal */
+    function typeDirectiveIsEqualTo(oldResolution, newResolution) {
+        return oldResolution.resolvedFileName === newResolution.resolvedFileName && oldResolution.primary === newResolution.primary;
+    }
+    ts.typeDirectiveIsEqualTo = typeDirectiveIsEqualTo;
+    /* @internal */
+    function hasChangesInResolutions(names, newResolutions, oldResolutions, comparer) {
+        if (names.length !== newResolutions.length) {
+            return false;
+        }
+        for (var i = 0; i < names.length; i++) {
+            var newResolution = newResolutions[i];
+            var oldResolution = oldResolutions && ts.hasProperty(oldResolutions, names[i]) ? oldResolutions[names[i]] : undefined;
+            var changed = oldResolution
+                ? !newResolution || !comparer(oldResolution, newResolution)
+                : newResolution;
+            if (changed) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.hasChangesInResolutions = hasChangesInResolutions;
+    // Returns true if this node contains a parse error anywhere underneath it.
+    function containsParseError(node) {
+        aggregateChildData(node);
+        return (node.flags & 268435456 /* ThisNodeOrAnySubNodesHasError */) !== 0;
+    }
+    ts.containsParseError = containsParseError;
+    function aggregateChildData(node) {
+        if (!(node.flags & 536870912 /* HasAggregatedChildData */)) {
+            // A node is considered to contain a parse error if:
+            //  a) the parser explicitly marked that it had an error
+            //  b) any of it's children reported that it had an error.
+            var thisNodeOrAnySubNodesHasError = ((node.flags & 67108864 /* ThisNodeHasError */) !== 0) ||
+                ts.forEachChild(node, containsParseError);
+            // If so, mark ourselves accordingly.
+            if (thisNodeOrAnySubNodesHasError) {
+                node.flags |= 268435456 /* ThisNodeOrAnySubNodesHasError */;
+            }
+            // Also mark that we've propagated the child information to this node.  This way we can
+            // always consult the bit directly on this node without needing to check its children
+            // again.
+            node.flags |= 536870912 /* HasAggregatedChildData */;
+        }
+    }
+    function getSourceFileOfNode(node) {
+        while (node && node.kind !== 256 /* SourceFile */) {
+            node = node.parent;
+        }
+        return node;
+    }
+    ts.getSourceFileOfNode = getSourceFileOfNode;
+    function isStatementWithLocals(node) {
+        switch (node.kind) {
+            case 199 /* Block */:
+            case 227 /* CaseBlock */:
+            case 206 /* ForStatement */:
+            case 207 /* ForInStatement */:
+            case 208 /* ForOfStatement */:
+                return true;
+        }
+        return false;
+    }
+    ts.isStatementWithLocals = isStatementWithLocals;
+    function getStartPositionOfLine(line, sourceFile) {
+        ts.Debug.assert(line >= 0);
+        return ts.getLineStarts(sourceFile)[line];
+    }
+    ts.getStartPositionOfLine = getStartPositionOfLine;
+    // This is a useful function for debugging purposes.
+    function nodePosToString(node) {
+        var file = getSourceFileOfNode(node);
+        var loc = ts.getLineAndCharacterOfPosition(file, node.pos);
+        return file.fileName + "(" + (loc.line + 1) + "," + (loc.character + 1) + ")";
+    }
+    ts.nodePosToString = nodePosToString;
+    function getStartPosOfNode(node) {
+        return node.pos;
+    }
+    ts.getStartPosOfNode = getStartPosOfNode;
+    function getEndLinePosition(line, sourceFile) {
+        ts.Debug.assert(line >= 0);
+        var lineStarts = ts.getLineStarts(sourceFile);
+        var lineIndex = line;
+        var sourceText = sourceFile.text;
+        if (lineIndex + 1 === lineStarts.length) {
+            // last line - return EOF
+            return sourceText.length - 1;
+        }
+        else {
+            // current line start
+            var start = lineStarts[lineIndex];
+            // take the start position of the next line - 1 = it should be some line break
+            var pos = lineStarts[lineIndex + 1] - 1;
+            ts.Debug.assert(ts.isLineBreak(sourceText.charCodeAt(pos)));
+            // walk backwards skipping line breaks, stop the the beginning of current line.
+            // i.e:
+            // <some text>
+            // $ <- end of line for this position should match the start position
+            while (start <= pos && ts.isLineBreak(sourceText.charCodeAt(pos))) {
+                pos--;
+            }
+            return pos;
+        }
+    }
+    ts.getEndLinePosition = getEndLinePosition;
+    // Returns true if this node is missing from the actual source code. A 'missing' node is different
+    // from 'undefined/defined'. When a node is undefined (which can happen for optional nodes
+    // in the tree), it is definitely missing. However, a node may be defined, but still be
+    // missing.  This happens whenever the parser knows it needs to parse something, but can't
+    // get anything in the source code that it expects at that location. For example:
+    //
+    //          let a: ;
+    //
+    // Here, the Type in the Type-Annotation is not-optional (as there is a colon in the source
+    // code). So the parser will attempt to parse out a type, and will create an actual node.
+    // However, this node will be 'missing' in the sense that no actual source-code/tokens are
+    // contained within it.
+    function nodeIsMissing(node) {
+        if (!node) {
+            return true;
+        }
+        return node.pos === node.end && node.pos >= 0 && node.kind !== 1 /* EndOfFileToken */;
+    }
+    ts.nodeIsMissing = nodeIsMissing;
+    function nodeIsPresent(node) {
+        return !nodeIsMissing(node);
+    }
+    ts.nodeIsPresent = nodeIsPresent;
+    function getTokenPosOfNode(node, sourceFile, includeJsDocComment) {
+        // With nodes that have no width (i.e. 'Missing' nodes), we actually *don't*
+        // want to skip trivia because this will launch us forward to the next token.
+        if (nodeIsMissing(node)) {
+            return node.pos;
+        }
+        if (isJSDocNode(node)) {
+            return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos, /*stopAfterLineBreak*/ false, /*stopAtComments*/ true);
+        }
+        if (includeJsDocComment && node.jsDocComments && node.jsDocComments.length > 0) {
+            return getTokenPosOfNode(node.jsDocComments[0]);
+        }
+        // For a syntax list, it is possible that one of its children has JSDocComment nodes, while
+        // the syntax list itself considers them as normal trivia. Therefore if we simply skip
+        // trivia for the list, we may have skipped the JSDocComment as well. So we should process its
+        // first child to determine the actual position of its first token.
+        if (node.kind === 282 /* SyntaxList */ && node._children.length > 0) {
+            return getTokenPosOfNode(node._children[0], sourceFile, includeJsDocComment);
+        }
+        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.pos);
+    }
+    ts.getTokenPosOfNode = getTokenPosOfNode;
+    function isJSDocNode(node) {
+        return node.kind >= 257 /* FirstJSDocNode */ && node.kind <= 281 /* LastJSDocNode */;
+    }
+    ts.isJSDocNode = isJSDocNode;
+    function getNonDecoratorTokenPosOfNode(node, sourceFile) {
+        if (nodeIsMissing(node) || !node.decorators) {
+            return getTokenPosOfNode(node, sourceFile);
+        }
+        return ts.skipTrivia((sourceFile || getSourceFileOfNode(node)).text, node.decorators.end);
+    }
+    ts.getNonDecoratorTokenPosOfNode = getNonDecoratorTokenPosOfNode;
+    function getSourceTextOfNodeFromSourceFile(sourceFile, node, includeTrivia) {
+        if (includeTrivia === void 0) { includeTrivia = false; }
+        if (nodeIsMissing(node)) {
+            return "";
+        }
+        var text = sourceFile.text;
+        return text.substring(includeTrivia ? node.pos : ts.skipTrivia(text, node.pos), node.end);
+    }
+    ts.getSourceTextOfNodeFromSourceFile = getSourceTextOfNodeFromSourceFile;
+    function getTextOfNodeFromSourceText(sourceText, node) {
+        if (nodeIsMissing(node)) {
+            return "";
+        }
+        return sourceText.substring(ts.skipTrivia(sourceText, node.pos), node.end);
+    }
+    ts.getTextOfNodeFromSourceText = getTextOfNodeFromSourceText;
+    function getTextOfNode(node, includeTrivia) {
+        if (includeTrivia === void 0) { includeTrivia = false; }
+        return getSourceTextOfNodeFromSourceFile(getSourceFileOfNode(node), node, includeTrivia);
+    }
+    ts.getTextOfNode = getTextOfNode;
+    // Add an extra underscore to identifiers that start with two underscores to avoid issues with magic names like '__proto__'
+    function escapeIdentifier(identifier) {
+        return identifier.length >= 2 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ ? "_" + identifier : identifier;
+    }
+    ts.escapeIdentifier = escapeIdentifier;
+    // Remove extra underscore from escaped identifier
+    function unescapeIdentifier(identifier) {
+        return identifier.length >= 3 && identifier.charCodeAt(0) === 95 /* _ */ && identifier.charCodeAt(1) === 95 /* _ */ && identifier.charCodeAt(2) === 95 /* _ */ ? identifier.substr(1) : identifier;
+    }
+    ts.unescapeIdentifier = unescapeIdentifier;
+    // Make an identifier from an external module name by extracting the string after the last "/" and replacing
+    // all non-alphanumeric characters with underscores
+    function makeIdentifierFromModuleName(moduleName) {
+        return ts.getBaseFileName(moduleName).replace(/^(\d)/, "_$1").replace(/\W/g, "_");
+    }
+    ts.makeIdentifierFromModuleName = makeIdentifierFromModuleName;
+    function isBlockOrCatchScoped(declaration) {
+        return (getCombinedNodeFlags(declaration) & 3072 /* BlockScoped */) !== 0 ||
+            isCatchClauseVariableDeclaration(declaration);
+    }
+    ts.isBlockOrCatchScoped = isBlockOrCatchScoped;
+    function isAmbientModule(node) {
+        return node && node.kind === 225 /* ModuleDeclaration */ &&
+            (node.name.kind === 9 /* StringLiteral */ || isGlobalScopeAugmentation(node));
+    }
+    ts.isAmbientModule = isAmbientModule;
+    function isBlockScopedContainerTopLevel(node) {
+        return node.kind === 256 /* SourceFile */ ||
+            node.kind === 225 /* ModuleDeclaration */ ||
+            isFunctionLike(node) ||
+            isFunctionBlock(node);
+    }
+    ts.isBlockScopedContainerTopLevel = isBlockScopedContainerTopLevel;
+    function isGlobalScopeAugmentation(module) {
+        return !!(module.flags & 131072 /* GlobalAugmentation */);
+    }
+    ts.isGlobalScopeAugmentation = isGlobalScopeAugmentation;
+    function isExternalModuleAugmentation(node) {
+        // external module augmentation is a ambient module declaration that is either:
+        // - defined in the top level scope and source file is an external module
+        // - defined inside ambient module declaration located in the top level scope and source file not an external module
+        if (!node || !isAmbientModule(node)) {
+            return false;
+        }
+        switch (node.parent.kind) {
+            case 256 /* SourceFile */:
+                return ts.isExternalModule(node.parent);
+            case 226 /* ModuleBlock */:
+                return isAmbientModule(node.parent.parent) && !ts.isExternalModule(node.parent.parent.parent);
+        }
+        return false;
+    }
+    ts.isExternalModuleAugmentation = isExternalModuleAugmentation;
+    // Gets the nearest enclosing block scope container that has the provided node
+    // as a descendant, that is not the provided node.
+    function getEnclosingBlockScopeContainer(node) {
+        var current = node.parent;
+        while (current) {
+            if (isFunctionLike(current)) {
+                return current;
+            }
+            switch (current.kind) {
+                case 256 /* SourceFile */:
+                case 227 /* CaseBlock */:
+                case 252 /* CatchClause */:
+                case 225 /* ModuleDeclaration */:
+                case 206 /* ForStatement */:
+                case 207 /* ForInStatement */:
+                case 208 /* ForOfStatement */:
+                    return current;
+                case 199 /* Block */:
+                    // function block is not considered block-scope container
+                    // see comment in binder.ts: bind(...), case for SyntaxKind.Block
+                    if (!isFunctionLike(current.parent)) {
+                        return current;
+                    }
+            }
+            current = current.parent;
+        }
+    }
+    ts.getEnclosingBlockScopeContainer = getEnclosingBlockScopeContainer;
+    function isCatchClauseVariableDeclaration(declaration) {
+        return declaration &&
+            declaration.kind === 218 /* VariableDeclaration */ &&
+            declaration.parent &&
+            declaration.parent.kind === 252 /* CatchClause */;
+    }
+    ts.isCatchClauseVariableDeclaration = isCatchClauseVariableDeclaration;
+    // Return display name of an identifier
+    // Computed property names will just be emitted as "[<expr>]", where <expr> is the source
+    // text of the expression in the computed property.
+    function declarationNameToString(name) {
+        return getFullWidth(name) === 0 ? "(Missing)" : getTextOfNode(name);
+    }
+    ts.declarationNameToString = declarationNameToString;
+    function createDiagnosticForNode(node, message, arg0, arg1, arg2) {
+        var sourceFile = getSourceFileOfNode(node);
+        var span = getErrorSpanForNode(sourceFile, node);
+        return ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2);
+    }
+    ts.createDiagnosticForNode = createDiagnosticForNode;
+    function createDiagnosticForNodeFromMessageChain(node, messageChain) {
+        var sourceFile = getSourceFileOfNode(node);
+        var span = getErrorSpanForNode(sourceFile, node);
+        return {
+            file: sourceFile,
+            start: span.start,
+            length: span.length,
+            code: messageChain.code,
+            category: messageChain.category,
+            messageText: messageChain.next ? messageChain : messageChain.messageText
+        };
+    }
+    ts.createDiagnosticForNodeFromMessageChain = createDiagnosticForNodeFromMessageChain;
+    function getSpanOfTokenAtPosition(sourceFile, pos) {
+        var scanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ true, sourceFile.languageVariant, sourceFile.text, /*onError:*/ undefined, pos);
+        scanner.scan();
+        var start = scanner.getTokenPos();
+        return ts.createTextSpanFromBounds(start, scanner.getTextPos());
+    }
+    ts.getSpanOfTokenAtPosition = getSpanOfTokenAtPosition;
+    function getErrorSpanForArrowFunction(sourceFile, node) {
+        var pos = ts.skipTrivia(sourceFile.text, node.pos);
+        if (node.body && node.body.kind === 199 /* Block */) {
+            var startLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.pos).line;
+            var endLine = ts.getLineAndCharacterOfPosition(sourceFile, node.body.end).line;
+            if (startLine < endLine) {
+                // The arrow function spans multiple lines,
+                // make the error span be the first line, inclusive.
+                return ts.createTextSpan(pos, getEndLinePosition(startLine, sourceFile) - pos + 1);
+            }
+        }
+        return ts.createTextSpanFromBounds(pos, node.end);
+    }
+    function getErrorSpanForNode(sourceFile, node) {
+        var errorNode = node;
+        switch (node.kind) {
+            case 256 /* SourceFile */:
+                var pos_1 = ts.skipTrivia(sourceFile.text, 0, /*stopAfterLineBreak*/ false);
+                if (pos_1 === sourceFile.text.length) {
+                    // file is empty - return span for the beginning of the file
+                    return ts.createTextSpan(0, 0);
+                }
+                return getSpanOfTokenAtPosition(sourceFile, pos_1);
+            // This list is a work in progress. Add missing node kinds to improve their error
+            // spans.
+            case 218 /* VariableDeclaration */:
+            case 169 /* BindingElement */:
+            case 221 /* ClassDeclaration */:
+            case 192 /* ClassExpression */:
+            case 222 /* InterfaceDeclaration */:
+            case 225 /* ModuleDeclaration */:
+            case 224 /* EnumDeclaration */:
+            case 255 /* EnumMember */:
+            case 220 /* FunctionDeclaration */:
+            case 179 /* FunctionExpression */:
+            case 147 /* MethodDeclaration */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 223 /* TypeAliasDeclaration */:
+                errorNode = node.name;
+                break;
+            case 180 /* ArrowFunction */:
+                return getErrorSpanForArrowFunction(sourceFile, node);
+        }
+        if (errorNode === undefined) {
+            // If we don't have a better node, then just set the error on the first token of
+            // construct.
+            return getSpanOfTokenAtPosition(sourceFile, node.pos);
+        }
+        var pos = nodeIsMissing(errorNode)
+            ? errorNode.pos
+            : ts.skipTrivia(sourceFile.text, errorNode.pos);
+        return ts.createTextSpanFromBounds(pos, errorNode.end);
+    }
+    ts.getErrorSpanForNode = getErrorSpanForNode;
+    function isExternalOrCommonJsModule(file) {
+        return (file.externalModuleIndicator || file.commonJsModuleIndicator) !== undefined;
+    }
+    ts.isExternalOrCommonJsModule = isExternalOrCommonJsModule;
+    function isDeclarationFile(file) {
+        return file.isDeclarationFile;
+    }
+    ts.isDeclarationFile = isDeclarationFile;
+    function isConstEnumDeclaration(node) {
+        return node.kind === 224 /* EnumDeclaration */ && isConst(node);
+    }
+    ts.isConstEnumDeclaration = isConstEnumDeclaration;
+    function walkUpBindingElementsAndPatterns(node) {
+        while (node && (node.kind === 169 /* BindingElement */ || isBindingPattern(node))) {
+            node = node.parent;
+        }
+        return node;
+    }
+    // Returns the node flags for this node and all relevant parent nodes.  This is done so that
+    // nodes like variable declarations and binding elements can returned a view of their flags
+    // that includes the modifiers from their container.  i.e. flags like export/declare aren't
+    // stored on the variable declaration directly, but on the containing variable statement
+    // (if it has one).  Similarly, flags for let/const are store on the variable declaration
+    // list.  By calling this function, all those flags are combined so that the client can treat
+    // the node as if it actually had those flags.
+    function getCombinedNodeFlags(node) {
+        node = walkUpBindingElementsAndPatterns(node);
+        var flags = node.flags;
+        if (node.kind === 218 /* VariableDeclaration */) {
+            node = node.parent;
+        }
+        if (node && node.kind === 219 /* VariableDeclarationList */) {
+            flags |= node.flags;
+            node = node.parent;
+        }
+        if (node && node.kind === 200 /* VariableStatement */) {
+            flags |= node.flags;
+        }
+        return flags;
+    }
+    ts.getCombinedNodeFlags = getCombinedNodeFlags;
+    function isConst(node) {
+        return !!(getCombinedNodeFlags(node) & 2048 /* Const */);
+    }
+    ts.isConst = isConst;
+    function isLet(node) {
+        return !!(getCombinedNodeFlags(node) & 1024 /* Let */);
+    }
+    ts.isLet = isLet;
+    function isSuperCallExpression(n) {
+        return n.kind === 174 /* CallExpression */ && n.expression.kind === 95 /* SuperKeyword */;
+    }
+    ts.isSuperCallExpression = isSuperCallExpression;
+    function isPrologueDirective(node) {
+        return node.kind === 202 /* ExpressionStatement */ && node.expression.kind === 9 /* StringLiteral */;
+    }
+    ts.isPrologueDirective = isPrologueDirective;
+    function getLeadingCommentRangesOfNode(node, sourceFileOfNode) {
+        return ts.getLeadingCommentRanges(sourceFileOfNode.text, node.pos);
+    }
+    ts.getLeadingCommentRangesOfNode = getLeadingCommentRangesOfNode;
+    function getLeadingCommentRangesOfNodeFromText(node, text) {
+        return ts.getLeadingCommentRanges(text, node.pos);
+    }
+    ts.getLeadingCommentRangesOfNodeFromText = getLeadingCommentRangesOfNodeFromText;
+    function getJsDocComments(node, sourceFileOfNode) {
+        return getJsDocCommentsFromText(node, sourceFileOfNode.text);
+    }
+    ts.getJsDocComments = getJsDocComments;
+    function getJsDocCommentsFromText(node, text) {
+        var commentRanges = (node.kind === 142 /* Parameter */ ||
+            node.kind === 141 /* TypeParameter */ ||
+            node.kind === 179 /* FunctionExpression */ ||
+            node.kind === 180 /* ArrowFunction */) ?
+            ts.concatenate(ts.getTrailingCommentRanges(text, node.pos), ts.getLeadingCommentRanges(text, node.pos)) :
+            getLeadingCommentRangesOfNodeFromText(node, text);
+        return ts.filter(commentRanges, isJsDocComment);
+        function isJsDocComment(comment) {
+            // True if the comment starts with '/**' but not if it is '/**/'
+            return text.charCodeAt(comment.pos + 1) === 42 /* asterisk */ &&
+                text.charCodeAt(comment.pos + 2) === 42 /* asterisk */ &&
+                text.charCodeAt(comment.pos + 3) !== 47 /* slash */;
+        }
+    }
+    ts.getJsDocCommentsFromText = getJsDocCommentsFromText;
+    ts.fullTripleSlashReferencePathRegEx = /^(\/\/\/\s*<reference\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
+    ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx = /^(\/\/\/\s*<reference\s+types\s*=\s*)('|")(.+?)\2.*?\/>/;
+    ts.fullTripleSlashAMDReferencePathRegEx = /^(\/\/\/\s*<amd-dependency\s+path\s*=\s*)('|")(.+?)\2.*?\/>/;
+    function isTypeNode(node) {
+        if (154 /* FirstTypeNode */ <= node.kind && node.kind <= 166 /* LastTypeNode */) {
+            return true;
+        }
+        switch (node.kind) {
+            case 117 /* AnyKeyword */:
+            case 130 /* NumberKeyword */:
+            case 132 /* StringKeyword */:
+            case 120 /* BooleanKeyword */:
+            case 133 /* SymbolKeyword */:
+            case 135 /* UndefinedKeyword */:
+            case 127 /* NeverKeyword */:
+                return true;
+            case 103 /* VoidKeyword */:
+                return node.parent.kind !== 183 /* VoidExpression */;
+            case 194 /* ExpressionWithTypeArguments */:
+                return !isExpressionWithTypeArgumentsInClassExtendsClause(node);
+            // Identifiers and qualified names may be type nodes, depending on their context. Climb
+            // above them to find the lowest container
+            case 69 /* Identifier */:
+                // If the identifier is the RHS of a qualified name, then it's a type iff its parent is.
+                if (node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node) {
+                    node = node.parent;
+                }
+                else if (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node) {
+                    node = node.parent;
+                }
+                // At this point, node is either a qualified name or an identifier
+                ts.Debug.assert(node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */ || node.kind === 172 /* PropertyAccessExpression */, "'node' was expected to be a qualified name, identifier or property access in 'isTypeNode'.");
+            case 139 /* QualifiedName */:
+            case 172 /* PropertyAccessExpression */:
+            case 97 /* ThisKeyword */:
+                var parent_1 = node.parent;
+                if (parent_1.kind === 158 /* TypeQuery */) {
+                    return false;
+                }
+                // Do not recursively call isTypeNode on the parent. In the example:
+                //
+                //     let a: A.B.C;
+                //
+                // Calling isTypeNode would consider the qualified name A.B a type node. Only C or
+                // A.B.C is a type node.
+                if (154 /* FirstTypeNode */ <= parent_1.kind && parent_1.kind <= 166 /* LastTypeNode */) {
+                    return true;
+                }
+                switch (parent_1.kind) {
+                    case 194 /* ExpressionWithTypeArguments */:
+                        return !isExpressionWithTypeArgumentsInClassExtendsClause(parent_1);
+                    case 141 /* TypeParameter */:
+                        return node === parent_1.constraint;
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                    case 142 /* Parameter */:
+                    case 218 /* VariableDeclaration */:
+                        return node === parent_1.type;
+                    case 220 /* FunctionDeclaration */:
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 148 /* Constructor */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        return node === parent_1.type;
+                    case 151 /* CallSignature */:
+                    case 152 /* ConstructSignature */:
+                    case 153 /* IndexSignature */:
+                        return node === parent_1.type;
+                    case 177 /* TypeAssertionExpression */:
+                        return node === parent_1.type;
+                    case 174 /* CallExpression */:
+                    case 175 /* NewExpression */:
+                        return parent_1.typeArguments && ts.indexOf(parent_1.typeArguments, node) >= 0;
+                    case 176 /* TaggedTemplateExpression */:
+                        // TODO (drosen): TaggedTemplateExpressions may eventually support type arguments.
+                        return false;
+                }
+        }
+        return false;
+    }
+    ts.isTypeNode = isTypeNode;
+    // Warning: This has the same semantics as the forEach family of functions,
+    //          in that traversal terminates in the event that 'visitor' supplies a truthy value.
+    function forEachReturnStatement(body, visitor) {
+        return traverse(body);
+        function traverse(node) {
+            switch (node.kind) {
+                case 211 /* ReturnStatement */:
+                    return visitor(node);
+                case 227 /* CaseBlock */:
+                case 199 /* Block */:
+                case 203 /* IfStatement */:
+                case 204 /* DoStatement */:
+                case 205 /* WhileStatement */:
+                case 206 /* ForStatement */:
+                case 207 /* ForInStatement */:
+                case 208 /* ForOfStatement */:
+                case 212 /* WithStatement */:
+                case 213 /* SwitchStatement */:
+                case 249 /* CaseClause */:
+                case 250 /* DefaultClause */:
+                case 214 /* LabeledStatement */:
+                case 216 /* TryStatement */:
+                case 252 /* CatchClause */:
+                    return ts.forEachChild(node, traverse);
+            }
+        }
+    }
+    ts.forEachReturnStatement = forEachReturnStatement;
+    function forEachYieldExpression(body, visitor) {
+        return traverse(body);
+        function traverse(node) {
+            switch (node.kind) {
+                case 190 /* YieldExpression */:
+                    visitor(node);
+                    var operand = node.expression;
+                    if (operand) {
+                        traverse(operand);
+                    }
+                case 224 /* EnumDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 225 /* ModuleDeclaration */:
+                case 223 /* TypeAliasDeclaration */:
+                case 221 /* ClassDeclaration */:
+                case 192 /* ClassExpression */:
+                    // These are not allowed inside a generator now, but eventually they may be allowed
+                    // as local types. Regardless, any yield statements contained within them should be
+                    // skipped in this traversal.
+                    return;
+                default:
+                    if (isFunctionLike(node)) {
+                        var name_5 = node.name;
+                        if (name_5 && name_5.kind === 140 /* ComputedPropertyName */) {
+                            // Note that we will not include methods/accessors of a class because they would require
+                            // first descending into the class. This is by design.
+                            traverse(name_5.expression);
+                            return;
+                        }
+                    }
+                    else if (!isTypeNode(node)) {
+                        // This is the general case, which should include mostly expressions and statements.
+                        // Also includes NodeArrays.
+                        ts.forEachChild(node, traverse);
+                    }
+            }
+        }
+    }
+    ts.forEachYieldExpression = forEachYieldExpression;
+    function isVariableLike(node) {
+        if (node) {
+            switch (node.kind) {
+                case 169 /* BindingElement */:
+                case 255 /* EnumMember */:
+                case 142 /* Parameter */:
+                case 253 /* PropertyAssignment */:
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 254 /* ShorthandPropertyAssignment */:
+                case 218 /* VariableDeclaration */:
+                    return true;
+            }
+        }
+        return false;
+    }
+    ts.isVariableLike = isVariableLike;
+    function isAccessor(node) {
+        return node && (node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */);
+    }
+    ts.isAccessor = isAccessor;
+    function isClassLike(node) {
+        return node && (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */);
+    }
+    ts.isClassLike = isClassLike;
+    function isFunctionLike(node) {
+        return node && isFunctionLikeKind(node.kind);
+    }
+    ts.isFunctionLike = isFunctionLike;
+    function isFunctionLikeKind(kind) {
+        switch (kind) {
+            case 148 /* Constructor */:
+            case 179 /* FunctionExpression */:
+            case 220 /* FunctionDeclaration */:
+            case 180 /* ArrowFunction */:
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 151 /* CallSignature */:
+            case 152 /* ConstructSignature */:
+            case 153 /* IndexSignature */:
+            case 156 /* FunctionType */:
+            case 157 /* ConstructorType */:
+                return true;
+        }
+    }
+    ts.isFunctionLikeKind = isFunctionLikeKind;
+    function introducesArgumentsExoticObject(node) {
+        switch (node.kind) {
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+            case 148 /* Constructor */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 220 /* FunctionDeclaration */:
+            case 179 /* FunctionExpression */:
+                return true;
+        }
+        return false;
+    }
+    ts.introducesArgumentsExoticObject = introducesArgumentsExoticObject;
+    function isIterationStatement(node, lookInLabeledStatements) {
+        switch (node.kind) {
+            case 206 /* ForStatement */:
+            case 207 /* ForInStatement */:
+            case 208 /* ForOfStatement */:
+            case 204 /* DoStatement */:
+            case 205 /* WhileStatement */:
+                return true;
+            case 214 /* LabeledStatement */:
+                return lookInLabeledStatements && isIterationStatement(node.statement, lookInLabeledStatements);
+        }
+        return false;
+    }
+    ts.isIterationStatement = isIterationStatement;
+    function isFunctionBlock(node) {
+        return node && node.kind === 199 /* Block */ && isFunctionLike(node.parent);
+    }
+    ts.isFunctionBlock = isFunctionBlock;
+    function isObjectLiteralMethod(node) {
+        return node && node.kind === 147 /* MethodDeclaration */ && node.parent.kind === 171 /* ObjectLiteralExpression */;
+    }
+    ts.isObjectLiteralMethod = isObjectLiteralMethod;
+    function isIdentifierTypePredicate(predicate) {
+        return predicate && predicate.kind === 1 /* Identifier */;
+    }
+    ts.isIdentifierTypePredicate = isIdentifierTypePredicate;
+    function isThisTypePredicate(predicate) {
+        return predicate && predicate.kind === 0 /* This */;
+    }
+    ts.isThisTypePredicate = isThisTypePredicate;
+    function getContainingFunction(node) {
+        while (true) {
+            node = node.parent;
+            if (!node || isFunctionLike(node)) {
+                return node;
+            }
+        }
+    }
+    ts.getContainingFunction = getContainingFunction;
+    function getContainingClass(node) {
+        while (true) {
+            node = node.parent;
+            if (!node || isClassLike(node)) {
+                return node;
+            }
+        }
+    }
+    ts.getContainingClass = getContainingClass;
+    function getThisContainer(node, includeArrowFunctions) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return undefined;
+            }
+            switch (node.kind) {
+                case 140 /* ComputedPropertyName */:
+                    // If the grandparent node is an object literal (as opposed to a class),
+                    // then the computed property is not a 'this' container.
+                    // A computed property name in a class needs to be a this container
+                    // so that we can error on it.
+                    if (isClassLike(node.parent.parent)) {
+                        return node;
+                    }
+                    // If this is a computed property, then the parent should not
+                    // make it a this container. The parent might be a property
+                    // in an object literal, like a method or accessor. But in order for
+                    // such a parent to be a this container, the reference must be in
+                    // the *body* of the container.
+                    node = node.parent;
+                    break;
+                case 143 /* Decorator */:
+                    // Decorators are always applied outside of the body of a class or method.
+                    if (node.parent.kind === 142 /* Parameter */ && isClassElement(node.parent.parent)) {
+                        // If the decorator's parent is a Parameter, we resolve the this container from
+                        // the grandparent class declaration.
+                        node = node.parent.parent;
+                    }
+                    else if (isClassElement(node.parent)) {
+                        // If the decorator's parent is a class element, we resolve the 'this' container
+                        // from the parent class declaration.
+                        node = node.parent;
+                    }
+                    break;
+                case 180 /* ArrowFunction */:
+                    if (!includeArrowFunctions) {
+                        continue;
+                    }
+                // Fall through
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 225 /* ModuleDeclaration */:
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 148 /* Constructor */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 151 /* CallSignature */:
+                case 152 /* ConstructSignature */:
+                case 153 /* IndexSignature */:
+                case 224 /* EnumDeclaration */:
+                case 256 /* SourceFile */:
+                    return node;
+            }
+        }
+    }
+    ts.getThisContainer = getThisContainer;
+    /**
+      * Given an super call\property node returns a closest node where either
+      * - super call\property is legal in the node and not legal in the parent node the node.
+      *   i.e. super call is legal in constructor but not legal in the class body.
+      * - node is arrow function (so caller might need to call getSuperContainer in case it needs to climb higher)
+      * - super call\property is definitely illegal in the node (but might be legal in some subnode)
+      *   i.e. super property access is illegal in function declaration but can be legal in the statement list
+      */
+    function getSuperContainer(node, stopOnFunctions) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return node;
+            }
+            switch (node.kind) {
+                case 140 /* ComputedPropertyName */:
+                    node = node.parent;
+                    break;
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    if (!stopOnFunctions) {
+                        continue;
+                    }
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 148 /* Constructor */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                    return node;
+                case 143 /* Decorator */:
+                    // Decorators are always applied outside of the body of a class or method.
+                    if (node.parent.kind === 142 /* Parameter */ && isClassElement(node.parent.parent)) {
+                        // If the decorator's parent is a Parameter, we resolve the this container from
+                        // the grandparent class declaration.
+                        node = node.parent.parent;
+                    }
+                    else if (isClassElement(node.parent)) {
+                        // If the decorator's parent is a class element, we resolve the 'this' container
+                        // from the parent class declaration.
+                        node = node.parent;
+                    }
+                    break;
+            }
+        }
+    }
+    ts.getSuperContainer = getSuperContainer;
+    function getImmediatelyInvokedFunctionExpression(func) {
+        if (func.kind === 179 /* FunctionExpression */ || func.kind === 180 /* ArrowFunction */) {
+            var prev = func;
+            var parent_2 = func.parent;
+            while (parent_2.kind === 178 /* ParenthesizedExpression */) {
+                prev = parent_2;
+                parent_2 = parent_2.parent;
+            }
+            if (parent_2.kind === 174 /* CallExpression */ && parent_2.expression === prev) {
+                return parent_2;
+            }
+        }
+    }
+    ts.getImmediatelyInvokedFunctionExpression = getImmediatelyInvokedFunctionExpression;
+    /**
+     * Determines whether a node is a property or element access expression for super.
+     */
+    function isSuperPropertyOrElementAccess(node) {
+        return (node.kind === 172 /* PropertyAccessExpression */
+            || node.kind === 173 /* ElementAccessExpression */)
+            && node.expression.kind === 95 /* SuperKeyword */;
+    }
+    ts.isSuperPropertyOrElementAccess = isSuperPropertyOrElementAccess;
+    function getEntityNameFromTypeNode(node) {
+        if (node) {
+            switch (node.kind) {
+                case 155 /* TypeReference */:
+                    return node.typeName;
+                case 194 /* ExpressionWithTypeArguments */:
+                    return node.expression;
+                case 69 /* Identifier */:
+                case 139 /* QualifiedName */:
+                    return node;
+            }
+        }
+        return undefined;
+    }
+    ts.getEntityNameFromTypeNode = getEntityNameFromTypeNode;
+    function getInvokedExpression(node) {
+        if (node.kind === 176 /* TaggedTemplateExpression */) {
+            return node.tag;
+        }
+        // Will either be a CallExpression, NewExpression, or Decorator.
+        return node.expression;
+    }
+    ts.getInvokedExpression = getInvokedExpression;
+    function nodeCanBeDecorated(node) {
+        switch (node.kind) {
+            case 221 /* ClassDeclaration */:
+                // classes are valid targets
+                return true;
+            case 145 /* PropertyDeclaration */:
+                // property declarations are valid if their parent is a class declaration.
+                return node.parent.kind === 221 /* ClassDeclaration */;
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 147 /* MethodDeclaration */:
+                // if this method has a body and its parent is a class declaration, this is a valid target.
+                return node.body !== undefined
+                    && node.parent.kind === 221 /* ClassDeclaration */;
+            case 142 /* Parameter */:
+                // if the parameter's parent has a body and its grandparent is a class declaration, this is a valid target;
+                return node.parent.body !== undefined
+                    && (node.parent.kind === 148 /* Constructor */
+                        || node.parent.kind === 147 /* MethodDeclaration */
+                        || node.parent.kind === 150 /* SetAccessor */)
+                    && node.parent.parent.kind === 221 /* ClassDeclaration */;
+        }
+        return false;
+    }
+    ts.nodeCanBeDecorated = nodeCanBeDecorated;
+    function nodeIsDecorated(node) {
+        return node.decorators !== undefined
+            && nodeCanBeDecorated(node);
+    }
+    ts.nodeIsDecorated = nodeIsDecorated;
+    function isPropertyAccessExpression(node) {
+        return node.kind === 172 /* PropertyAccessExpression */;
+    }
+    ts.isPropertyAccessExpression = isPropertyAccessExpression;
+    function isElementAccessExpression(node) {
+        return node.kind === 173 /* ElementAccessExpression */;
+    }
+    ts.isElementAccessExpression = isElementAccessExpression;
+    function isJSXTagName(node) {
+        var parent = node.parent;
+        if (parent.kind === 243 /* JsxOpeningElement */ ||
+            parent.kind === 242 /* JsxSelfClosingElement */ ||
+            parent.kind === 245 /* JsxClosingElement */) {
+            return parent.tagName === node;
+        }
+        return false;
+    }
+    ts.isJSXTagName = isJSXTagName;
+    function isExpression(node) {
+        switch (node.kind) {
+            case 97 /* ThisKeyword */:
+            case 95 /* SuperKeyword */:
+            case 93 /* NullKeyword */:
+            case 99 /* TrueKeyword */:
+            case 84 /* FalseKeyword */:
+            case 10 /* RegularExpressionLiteral */:
+            case 170 /* ArrayLiteralExpression */:
+            case 171 /* ObjectLiteralExpression */:
+            case 172 /* PropertyAccessExpression */:
+            case 173 /* ElementAccessExpression */:
+            case 174 /* CallExpression */:
+            case 175 /* NewExpression */:
+            case 176 /* TaggedTemplateExpression */:
+            case 195 /* AsExpression */:
+            case 177 /* TypeAssertionExpression */:
+            case 196 /* NonNullExpression */:
+            case 178 /* ParenthesizedExpression */:
+            case 179 /* FunctionExpression */:
+            case 192 /* ClassExpression */:
+            case 180 /* ArrowFunction */:
+            case 183 /* VoidExpression */:
+            case 181 /* DeleteExpression */:
+            case 182 /* TypeOfExpression */:
+            case 185 /* PrefixUnaryExpression */:
+            case 186 /* PostfixUnaryExpression */:
+            case 187 /* BinaryExpression */:
+            case 188 /* ConditionalExpression */:
+            case 191 /* SpreadElementExpression */:
+            case 189 /* TemplateExpression */:
+            case 11 /* NoSubstitutionTemplateLiteral */:
+            case 193 /* OmittedExpression */:
+            case 241 /* JsxElement */:
+            case 242 /* JsxSelfClosingElement */:
+            case 190 /* YieldExpression */:
+            case 184 /* AwaitExpression */:
+                return true;
+            case 139 /* QualifiedName */:
+                while (node.parent.kind === 139 /* QualifiedName */) {
+                    node = node.parent;
+                }
+                return node.parent.kind === 158 /* TypeQuery */ || isJSXTagName(node);
+            case 69 /* Identifier */:
+                if (node.parent.kind === 158 /* TypeQuery */ || isJSXTagName(node)) {
+                    return true;
+                }
+            // fall through
+            case 8 /* NumericLiteral */:
+            case 9 /* StringLiteral */:
+            case 97 /* ThisKeyword */:
+                var parent_3 = node.parent;
+                switch (parent_3.kind) {
+                    case 218 /* VariableDeclaration */:
+                    case 142 /* Parameter */:
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                    case 255 /* EnumMember */:
+                    case 253 /* PropertyAssignment */:
+                    case 169 /* BindingElement */:
+                        return parent_3.initializer === node;
+                    case 202 /* ExpressionStatement */:
+                    case 203 /* IfStatement */:
+                    case 204 /* DoStatement */:
+                    case 205 /* WhileStatement */:
+                    case 211 /* ReturnStatement */:
+                    case 212 /* WithStatement */:
+                    case 213 /* SwitchStatement */:
+                    case 249 /* CaseClause */:
+                    case 215 /* ThrowStatement */:
+                    case 213 /* SwitchStatement */:
+                        return parent_3.expression === node;
+                    case 206 /* ForStatement */:
+                        var forStatement = parent_3;
+                        return (forStatement.initializer === node && forStatement.initializer.kind !== 219 /* VariableDeclarationList */) ||
+                            forStatement.condition === node ||
+                            forStatement.incrementor === node;
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                        var forInStatement = parent_3;
+                        return (forInStatement.initializer === node && forInStatement.initializer.kind !== 219 /* VariableDeclarationList */) ||
+                            forInStatement.expression === node;
+                    case 177 /* TypeAssertionExpression */:
+                    case 195 /* AsExpression */:
+                        return node === parent_3.expression;
+                    case 197 /* TemplateSpan */:
+                        return node === parent_3.expression;
+                    case 140 /* ComputedPropertyName */:
+                        return node === parent_3.expression;
+                    case 143 /* Decorator */:
+                    case 248 /* JsxExpression */:
+                    case 247 /* JsxSpreadAttribute */:
+                        return true;
+                    case 194 /* ExpressionWithTypeArguments */:
+                        return parent_3.expression === node && isExpressionWithTypeArgumentsInClassExtendsClause(parent_3);
+                    default:
+                        if (isExpression(parent_3)) {
+                            return true;
+                        }
+                }
+        }
+        return false;
+    }
+    ts.isExpression = isExpression;
+    function isExternalModuleNameRelative(moduleName) {
+        // TypeScript 1.0 spec (April 2014): 11.2.1
+        // An external module name is "relative" if the first term is "." or "..".
+        return moduleName.substr(0, 2) === "./" || moduleName.substr(0, 3) === "../" || moduleName.substr(0, 2) === ".\\" || moduleName.substr(0, 3) === "..\\";
+    }
+    ts.isExternalModuleNameRelative = isExternalModuleNameRelative;
+    function isInstantiatedModule(node, preserveConstEnums) {
+        var moduleState = ts.getModuleInstanceState(node);
+        return moduleState === 1 /* Instantiated */ ||
+            (preserveConstEnums && moduleState === 2 /* ConstEnumOnly */);
+    }
+    ts.isInstantiatedModule = isInstantiatedModule;
+    function isExternalModuleImportEqualsDeclaration(node) {
+        return node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 240 /* ExternalModuleReference */;
+    }
+    ts.isExternalModuleImportEqualsDeclaration = isExternalModuleImportEqualsDeclaration;
+    function getExternalModuleImportEqualsDeclarationExpression(node) {
+        ts.Debug.assert(isExternalModuleImportEqualsDeclaration(node));
+        return node.moduleReference.expression;
+    }
+    ts.getExternalModuleImportEqualsDeclarationExpression = getExternalModuleImportEqualsDeclarationExpression;
+    function isInternalModuleImportEqualsDeclaration(node) {
+        return node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind !== 240 /* ExternalModuleReference */;
+    }
+    ts.isInternalModuleImportEqualsDeclaration = isInternalModuleImportEqualsDeclaration;
+    function isSourceFileJavaScript(file) {
+        return isInJavaScriptFile(file);
+    }
+    ts.isSourceFileJavaScript = isSourceFileJavaScript;
+    function isInJavaScriptFile(node) {
+        return node && !!(node.flags & 134217728 /* JavaScriptFile */);
+    }
+    ts.isInJavaScriptFile = isInJavaScriptFile;
+    /**
+     * Returns true if the node is a CallExpression to the identifier 'require' with
+     * exactly one argument.
+     * This function does not test if the node is in a JavaScript file or not.
+    */
+    function isRequireCall(expression, checkArgumentIsStringLiteral) {
+        // of the form 'require("name")'
+        var isRequire = expression.kind === 174 /* CallExpression */ &&
+            expression.expression.kind === 69 /* Identifier */ &&
+            expression.expression.text === "require" &&
+            expression.arguments.length === 1;
+        return isRequire && (!checkArgumentIsStringLiteral || expression.arguments[0].kind === 9 /* StringLiteral */);
+    }
+    ts.isRequireCall = isRequireCall;
+    function isSingleOrDoubleQuote(charCode) {
+        return charCode === 39 /* singleQuote */ || charCode === 34 /* doubleQuote */;
+    }
+    ts.isSingleOrDoubleQuote = isSingleOrDoubleQuote;
+    /// Given a BinaryExpression, returns SpecialPropertyAssignmentKind for the various kinds of property
+    /// assignments we treat as special in the binder
+    function getSpecialPropertyAssignmentKind(expression) {
+        if (!isInJavaScriptFile(expression)) {
+            return 0 /* None */;
+        }
+        if (expression.kind !== 187 /* BinaryExpression */) {
+            return 0 /* None */;
+        }
+        var expr = expression;
+        if (expr.operatorToken.kind !== 56 /* EqualsToken */ || expr.left.kind !== 172 /* PropertyAccessExpression */) {
+            return 0 /* None */;
+        }
+        var lhs = expr.left;
+        if (lhs.expression.kind === 69 /* Identifier */) {
+            var lhsId = lhs.expression;
+            if (lhsId.text === "exports") {
+                // exports.name = expr
+                return 1 /* ExportsProperty */;
+            }
+            else if (lhsId.text === "module" && lhs.name.text === "exports") {
+                // module.exports = expr
+                return 2 /* ModuleExports */;
+            }
+        }
+        else if (lhs.expression.kind === 97 /* ThisKeyword */) {
+            return 4 /* ThisProperty */;
+        }
+        else if (lhs.expression.kind === 172 /* PropertyAccessExpression */) {
+            // chained dot, e.g. x.y.z = expr; this var is the 'x.y' part
+            var innerPropertyAccess = lhs.expression;
+            if (innerPropertyAccess.expression.kind === 69 /* Identifier */) {
+                // module.exports.name = expr
+                var innerPropertyAccessIdentifier = innerPropertyAccess.expression;
+                if (innerPropertyAccessIdentifier.text === "module" && innerPropertyAccess.name.text === "exports") {
+                    return 1 /* ExportsProperty */;
+                }
+                if (innerPropertyAccess.name.text === "prototype") {
+                    return 3 /* PrototypeProperty */;
+                }
+            }
+        }
+        return 0 /* None */;
+    }
+    ts.getSpecialPropertyAssignmentKind = getSpecialPropertyAssignmentKind;
+    function getExternalModuleName(node) {
+        if (node.kind === 230 /* ImportDeclaration */) {
+            return node.moduleSpecifier;
+        }
+        if (node.kind === 229 /* ImportEqualsDeclaration */) {
+            var reference = node.moduleReference;
+            if (reference.kind === 240 /* ExternalModuleReference */) {
+                return reference.expression;
+            }
+        }
+        if (node.kind === 236 /* ExportDeclaration */) {
+            return node.moduleSpecifier;
+        }
+        if (node.kind === 225 /* ModuleDeclaration */ && node.name.kind === 9 /* StringLiteral */) {
+            return node.name;
+        }
+    }
+    ts.getExternalModuleName = getExternalModuleName;
+    function hasQuestionToken(node) {
+        if (node) {
+            switch (node.kind) {
+                case 142 /* Parameter */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 254 /* ShorthandPropertyAssignment */:
+                case 253 /* PropertyAssignment */:
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                    return node.questionToken !== undefined;
+            }
+        }
+        return false;
+    }
+    ts.hasQuestionToken = hasQuestionToken;
+    function isJSDocConstructSignature(node) {
+        return node.kind === 269 /* JSDocFunctionType */ &&
+            node.parameters.length > 0 &&
+            node.parameters[0].type.kind === 271 /* JSDocConstructorType */;
+    }
+    ts.isJSDocConstructSignature = isJSDocConstructSignature;
+    function getJSDocTag(node, kind, checkParentVariableStatement) {
+        if (!node) {
+            return undefined;
+        }
+        var jsDocComments = getJSDocComments(node, checkParentVariableStatement);
+        if (!jsDocComments) {
+            return undefined;
+        }
+        for (var _i = 0, jsDocComments_1 = jsDocComments; _i < jsDocComments_1.length; _i++) {
+            var jsDocComment = jsDocComments_1[_i];
+            for (var _a = 0, _b = jsDocComment.tags; _a < _b.length; _a++) {
+                var tag = _b[_a];
+                if (tag.kind === kind) {
+                    return tag;
+                }
+            }
+        }
+    }
+    function getJSDocComments(node, checkParentVariableStatement) {
+        if (node.jsDocComments) {
+            return node.jsDocComments;
+        }
+        // Try to recognize this pattern when node is initializer of variable declaration and JSDoc comments are on containing variable statement.
+        // /**
+        //   * @param {number} name
+        //   * @returns {number}
+        //   */
+        // var x = function(name) { return name.length; }
+        if (checkParentVariableStatement) {
+            var isInitializerOfVariableDeclarationInStatement = node.parent.kind === 218 /* VariableDeclaration */ &&
+                node.parent.initializer === node &&
+                node.parent.parent.parent.kind === 200 /* VariableStatement */;
+            var variableStatementNode = isInitializerOfVariableDeclarationInStatement ? node.parent.parent.parent : undefined;
+            if (variableStatementNode) {
+                return variableStatementNode.jsDocComments;
+            }
+            // Also recognize when the node is the RHS of an assignment expression
+            var parent_4 = node.parent;
+            var isSourceOfAssignmentExpressionStatement = parent_4 && parent_4.parent &&
+                parent_4.kind === 187 /* BinaryExpression */ &&
+                parent_4.operatorToken.kind === 56 /* EqualsToken */ &&
+                parent_4.parent.kind === 202 /* ExpressionStatement */;
+            if (isSourceOfAssignmentExpressionStatement) {
+                return parent_4.parent.jsDocComments;
+            }
+            var isPropertyAssignmentExpression = parent_4 && parent_4.kind === 253 /* PropertyAssignment */;
+            if (isPropertyAssignmentExpression) {
+                return parent_4.jsDocComments;
+            }
+        }
+        return undefined;
+    }
+    function getJSDocTypeTag(node) {
+        return getJSDocTag(node, 277 /* JSDocTypeTag */, /*checkParentVariableStatement*/ false);
+    }
+    ts.getJSDocTypeTag = getJSDocTypeTag;
+    function getJSDocReturnTag(node) {
+        return getJSDocTag(node, 276 /* JSDocReturnTag */, /*checkParentVariableStatement*/ true);
+    }
+    ts.getJSDocReturnTag = getJSDocReturnTag;
+    function getJSDocTemplateTag(node) {
+        return getJSDocTag(node, 278 /* JSDocTemplateTag */, /*checkParentVariableStatement*/ false);
+    }
+    ts.getJSDocTemplateTag = getJSDocTemplateTag;
+    function getCorrespondingJSDocParameterTag(parameter) {
+        if (parameter.name && parameter.name.kind === 69 /* Identifier */) {
+            // If it's a parameter, see if the parent has a jsdoc comment with an @param
+            // annotation.
+            var parameterName = parameter.name.text;
+            var jsDocComments = getJSDocComments(parameter.parent, /*checkParentVariableStatement*/ true);
+            if (jsDocComments) {
+                for (var _i = 0, jsDocComments_2 = jsDocComments; _i < jsDocComments_2.length; _i++) {
+                    var jsDocComment = jsDocComments_2[_i];
+                    for (var _a = 0, _b = jsDocComment.tags; _a < _b.length; _a++) {
+                        var tag = _b[_a];
+                        if (tag.kind === 275 /* JSDocParameterTag */) {
+                            var parameterTag = tag;
+                            var name_6 = parameterTag.preParameterName || parameterTag.postParameterName;
+                            if (name_6.text === parameterName) {
+                                return parameterTag;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getCorrespondingJSDocParameterTag = getCorrespondingJSDocParameterTag;
+    function hasRestParameter(s) {
+        return isRestParameter(ts.lastOrUndefined(s.parameters));
+    }
+    ts.hasRestParameter = hasRestParameter;
+    function hasDeclaredRestParameter(s) {
+        return isDeclaredRestParam(ts.lastOrUndefined(s.parameters));
+    }
+    ts.hasDeclaredRestParameter = hasDeclaredRestParameter;
+    function isRestParameter(node) {
+        if (node && (node.flags & 134217728 /* JavaScriptFile */)) {
+            if (node.type && node.type.kind === 270 /* JSDocVariadicType */) {
+                return true;
+            }
+            var paramTag = getCorrespondingJSDocParameterTag(node);
+            if (paramTag && paramTag.typeExpression) {
+                return paramTag.typeExpression.type.kind === 270 /* JSDocVariadicType */;
+            }
+        }
+        return isDeclaredRestParam(node);
+    }
+    ts.isRestParameter = isRestParameter;
+    function isDeclaredRestParam(node) {
+        return node && node.dotDotDotToken !== undefined;
+    }
+    ts.isDeclaredRestParam = isDeclaredRestParam;
+    function isLiteralKind(kind) {
+        return 8 /* FirstLiteralToken */ <= kind && kind <= 11 /* LastLiteralToken */;
+    }
+    ts.isLiteralKind = isLiteralKind;
+    function isTextualLiteralKind(kind) {
+        return kind === 9 /* StringLiteral */ || kind === 11 /* NoSubstitutionTemplateLiteral */;
+    }
+    ts.isTextualLiteralKind = isTextualLiteralKind;
+    function isTemplateLiteralKind(kind) {
+        return 11 /* FirstTemplateToken */ <= kind && kind <= 14 /* LastTemplateToken */;
+    }
+    ts.isTemplateLiteralKind = isTemplateLiteralKind;
+    function isBindingPattern(node) {
+        return !!node && (node.kind === 168 /* ArrayBindingPattern */ || node.kind === 167 /* ObjectBindingPattern */);
+    }
+    ts.isBindingPattern = isBindingPattern;
+    // A node is an assignment target if it is on the left hand side of an '=' token, if it is parented by a property
+    // assignment in an object literal that is an assignment target, or if it is parented by an array literal that is
+    // an assignment target. Examples include 'a = xxx', '{ p: a } = xxx', '[{ p: a}] = xxx'.
+    function isAssignmentTarget(node) {
+        while (node.parent.kind === 178 /* ParenthesizedExpression */) {
+            node = node.parent;
+        }
+        while (true) {
+            var parent_5 = node.parent;
+            if (parent_5.kind === 170 /* ArrayLiteralExpression */ || parent_5.kind === 191 /* SpreadElementExpression */) {
+                node = parent_5;
+                continue;
+            }
+            if (parent_5.kind === 253 /* PropertyAssignment */ || parent_5.kind === 254 /* ShorthandPropertyAssignment */) {
+                node = parent_5.parent;
+                continue;
+            }
+            return parent_5.kind === 187 /* BinaryExpression */ &&
+                parent_5.operatorToken.kind === 56 /* EqualsToken */ &&
+                parent_5.left === node ||
+                (parent_5.kind === 207 /* ForInStatement */ || parent_5.kind === 208 /* ForOfStatement */) &&
+                    parent_5.initializer === node;
+        }
+    }
+    ts.isAssignmentTarget = isAssignmentTarget;
+    function isNodeDescendentOf(node, ancestor) {
+        while (node) {
+            if (node === ancestor)
+                return true;
+            node = node.parent;
+        }
+        return false;
+    }
+    ts.isNodeDescendentOf = isNodeDescendentOf;
+    function isInAmbientContext(node) {
+        while (node) {
+            if (node.flags & 2 /* Ambient */ || (node.kind === 256 /* SourceFile */ && node.isDeclarationFile)) {
+                return true;
+            }
+            node = node.parent;
+        }
+        return false;
+    }
+    ts.isInAmbientContext = isInAmbientContext;
+    function isDeclaration(node) {
+        switch (node.kind) {
+            case 180 /* ArrowFunction */:
+            case 169 /* BindingElement */:
+            case 221 /* ClassDeclaration */:
+            case 192 /* ClassExpression */:
+            case 148 /* Constructor */:
+            case 224 /* EnumDeclaration */:
+            case 255 /* EnumMember */:
+            case 238 /* ExportSpecifier */:
+            case 220 /* FunctionDeclaration */:
+            case 179 /* FunctionExpression */:
+            case 149 /* GetAccessor */:
+            case 231 /* ImportClause */:
+            case 229 /* ImportEqualsDeclaration */:
+            case 234 /* ImportSpecifier */:
+            case 222 /* InterfaceDeclaration */:
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+            case 225 /* ModuleDeclaration */:
+            case 232 /* NamespaceImport */:
+            case 142 /* Parameter */:
+            case 253 /* PropertyAssignment */:
+            case 145 /* PropertyDeclaration */:
+            case 144 /* PropertySignature */:
+            case 150 /* SetAccessor */:
+            case 254 /* ShorthandPropertyAssignment */:
+            case 223 /* TypeAliasDeclaration */:
+            case 141 /* TypeParameter */:
+            case 218 /* VariableDeclaration */:
+            case 279 /* JSDocTypedefTag */:
+                return true;
+        }
+        return false;
+    }
+    ts.isDeclaration = isDeclaration;
+    function isStatement(n) {
+        switch (n.kind) {
+            case 210 /* BreakStatement */:
+            case 209 /* ContinueStatement */:
+            case 217 /* DebuggerStatement */:
+            case 204 /* DoStatement */:
+            case 202 /* ExpressionStatement */:
+            case 201 /* EmptyStatement */:
+            case 207 /* ForInStatement */:
+            case 208 /* ForOfStatement */:
+            case 206 /* ForStatement */:
+            case 203 /* IfStatement */:
+            case 214 /* LabeledStatement */:
+            case 211 /* ReturnStatement */:
+            case 213 /* SwitchStatement */:
+            case 215 /* ThrowStatement */:
+            case 216 /* TryStatement */:
+            case 200 /* VariableStatement */:
+            case 205 /* WhileStatement */:
+            case 212 /* WithStatement */:
+            case 235 /* ExportAssignment */:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isStatement = isStatement;
+    function isClassElement(n) {
+        switch (n.kind) {
+            case 148 /* Constructor */:
+            case 145 /* PropertyDeclaration */:
+            case 147 /* MethodDeclaration */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 146 /* MethodSignature */:
+            case 153 /* IndexSignature */:
+                return true;
+            default:
+                return false;
+        }
+    }
+    ts.isClassElement = isClassElement;
+    // True if the given identifier, string literal, or number literal is the name of a declaration node
+    function isDeclarationName(name) {
+        if (name.kind !== 69 /* Identifier */ && name.kind !== 9 /* StringLiteral */ && name.kind !== 8 /* NumericLiteral */) {
+            return false;
+        }
+        var parent = name.parent;
+        if (parent.kind === 234 /* ImportSpecifier */ || parent.kind === 238 /* ExportSpecifier */) {
+            if (parent.propertyName) {
+                return true;
+            }
+        }
+        if (isDeclaration(parent)) {
+            return parent.name === name;
+        }
+        return false;
+    }
+    ts.isDeclarationName = isDeclarationName;
+    function isLiteralComputedPropertyDeclarationName(node) {
+        return (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) &&
+            node.parent.kind === 140 /* ComputedPropertyName */ &&
+            isDeclaration(node.parent.parent);
+    }
+    ts.isLiteralComputedPropertyDeclarationName = isLiteralComputedPropertyDeclarationName;
+    // Return true if the given identifier is classified as an IdentifierName
+    function isIdentifierName(node) {
+        var parent = node.parent;
+        switch (parent.kind) {
+            case 145 /* PropertyDeclaration */:
+            case 144 /* PropertySignature */:
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 255 /* EnumMember */:
+            case 253 /* PropertyAssignment */:
+            case 172 /* PropertyAccessExpression */:
+                // Name in member declaration or property name in property access
+                return parent.name === node;
+            case 139 /* QualifiedName */:
+                // Name on right hand side of dot in a type query
+                if (parent.right === node) {
+                    while (parent.kind === 139 /* QualifiedName */) {
+                        parent = parent.parent;
+                    }
+                    return parent.kind === 158 /* TypeQuery */;
+                }
+                return false;
+            case 169 /* BindingElement */:
+            case 234 /* ImportSpecifier */:
+                // Property name in binding element or import specifier
+                return parent.propertyName === node;
+            case 238 /* ExportSpecifier */:
+                // Any name in an export specifier
+                return true;
+        }
+        return false;
+    }
+    ts.isIdentifierName = isIdentifierName;
+    // An alias symbol is created by one of the following declarations:
+    // import <symbol> = ...
+    // import <symbol> from ...
+    // import * as <symbol> from ...
+    // import { x as <symbol> } from ...
+    // export { x as <symbol> } from ...
+    // export = ...
+    // export default ...
+    function isAliasSymbolDeclaration(node) {
+        return node.kind === 229 /* ImportEqualsDeclaration */ ||
+            node.kind === 228 /* NamespaceExportDeclaration */ ||
+            node.kind === 231 /* ImportClause */ && !!node.name ||
+            node.kind === 232 /* NamespaceImport */ ||
+            node.kind === 234 /* ImportSpecifier */ ||
+            node.kind === 238 /* ExportSpecifier */ ||
+            node.kind === 235 /* ExportAssignment */ && node.expression.kind === 69 /* Identifier */;
+    }
+    ts.isAliasSymbolDeclaration = isAliasSymbolDeclaration;
+    function getClassExtendsHeritageClauseElement(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 83 /* ExtendsKeyword */);
+        return heritageClause && heritageClause.types.length > 0 ? heritageClause.types[0] : undefined;
+    }
+    ts.getClassExtendsHeritageClauseElement = getClassExtendsHeritageClauseElement;
+    function getClassImplementsHeritageClauseElements(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 106 /* ImplementsKeyword */);
+        return heritageClause ? heritageClause.types : undefined;
+    }
+    ts.getClassImplementsHeritageClauseElements = getClassImplementsHeritageClauseElements;
+    function getInterfaceBaseTypeNodes(node) {
+        var heritageClause = getHeritageClause(node.heritageClauses, 83 /* ExtendsKeyword */);
+        return heritageClause ? heritageClause.types : undefined;
+    }
+    ts.getInterfaceBaseTypeNodes = getInterfaceBaseTypeNodes;
+    function getHeritageClause(clauses, kind) {
+        if (clauses) {
+            for (var _i = 0, clauses_1 = clauses; _i < clauses_1.length; _i++) {
+                var clause = clauses_1[_i];
+                if (clause.token === kind) {
+                    return clause;
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getHeritageClause = getHeritageClause;
+    function tryResolveScriptReference(host, sourceFile, reference) {
+        if (!host.getCompilerOptions().noResolve) {
+            var referenceFileName = ts.isRootedDiskPath(reference.fileName) ? reference.fileName : ts.combinePaths(ts.getDirectoryPath(sourceFile.fileName), reference.fileName);
+            return host.getSourceFile(referenceFileName);
+        }
+    }
+    ts.tryResolveScriptReference = tryResolveScriptReference;
+    function getAncestor(node, kind) {
+        while (node) {
+            if (node.kind === kind) {
+                return node;
+            }
+            node = node.parent;
+        }
+        return undefined;
+    }
+    ts.getAncestor = getAncestor;
+    function getFileReferenceFromReferencePath(comment, commentRange) {
+        var simpleReferenceRegEx = /^\/\/\/\s*<reference\s+/gim;
+        var isNoDefaultLibRegEx = /^(\/\/\/\s*<reference\s+no-default-lib\s*=\s*)('|")(.+?)\2\s*\/>/gim;
+        if (simpleReferenceRegEx.test(comment)) {
+            if (isNoDefaultLibRegEx.test(comment)) {
+                return {
+                    isNoDefaultLib: true
+                };
+            }
+            else {
+                var refMatchResult = ts.fullTripleSlashReferencePathRegEx.exec(comment);
+                var refLibResult = !refMatchResult && ts.fullTripleSlashReferenceTypeReferenceDirectiveRegEx.exec(comment);
+                if (refMatchResult || refLibResult) {
+                    var start = commentRange.pos;
+                    var end = commentRange.end;
+                    return {
+                        fileReference: {
+                            pos: start,
+                            end: end,
+                            fileName: (refMatchResult || refLibResult)[3]
+                        },
+                        isNoDefaultLib: false,
+                        isTypeReferenceDirective: !!refLibResult
+                    };
+                }
+                return {
+                    diagnosticMessage: ts.Diagnostics.Invalid_reference_directive_syntax,
+                    isNoDefaultLib: false
+                };
+            }
+        }
+        return undefined;
+    }
+    ts.getFileReferenceFromReferencePath = getFileReferenceFromReferencePath;
+    function isKeyword(token) {
+        return 70 /* FirstKeyword */ <= token && token <= 138 /* LastKeyword */;
+    }
+    ts.isKeyword = isKeyword;
+    function isTrivia(token) {
+        return 2 /* FirstTriviaToken */ <= token && token <= 7 /* LastTriviaToken */;
+    }
+    ts.isTrivia = isTrivia;
+    function isAsyncFunctionLike(node) {
+        return isFunctionLike(node) && (node.flags & 256 /* Async */) !== 0 && !isAccessor(node);
+    }
+    ts.isAsyncFunctionLike = isAsyncFunctionLike;
+    function isStringOrNumericLiteral(kind) {
+        return kind === 9 /* StringLiteral */ || kind === 8 /* NumericLiteral */;
+    }
+    ts.isStringOrNumericLiteral = isStringOrNumericLiteral;
+    /**
+     * A declaration has a dynamic name if both of the following are true:
+     *   1. The declaration has a computed property name
+     *   2. The computed name is *not* expressed as Symbol.<name>, where name
+     *      is a property of the Symbol constructor that denotes a built in
+     *      Symbol.
+     */
+    function hasDynamicName(declaration) {
+        return declaration.name && isDynamicName(declaration.name);
+    }
+    ts.hasDynamicName = hasDynamicName;
+    function isDynamicName(name) {
+        return name.kind === 140 /* ComputedPropertyName */ &&
+            !isStringOrNumericLiteral(name.expression.kind) &&
+            !isWellKnownSymbolSyntactically(name.expression);
+    }
+    ts.isDynamicName = isDynamicName;
+    /**
+     * Checks if the expression is of the form:
+     *    Symbol.name
+     * where Symbol is literally the word "Symbol", and name is any identifierName
+     */
+    function isWellKnownSymbolSyntactically(node) {
+        return isPropertyAccessExpression(node) && isESSymbolIdentifier(node.expression);
+    }
+    ts.isWellKnownSymbolSyntactically = isWellKnownSymbolSyntactically;
+    function getPropertyNameForPropertyNameNode(name) {
+        if (name.kind === 69 /* Identifier */ || name.kind === 9 /* StringLiteral */ || name.kind === 8 /* NumericLiteral */ || name.kind === 142 /* Parameter */) {
+            return name.text;
+        }
+        if (name.kind === 140 /* ComputedPropertyName */) {
+            var nameExpression = name.expression;
+            if (isWellKnownSymbolSyntactically(nameExpression)) {
+                var rightHandSideName = nameExpression.name.text;
+                return getPropertyNameForKnownSymbolName(rightHandSideName);
+            }
+            else if (nameExpression.kind === 9 /* StringLiteral */ || nameExpression.kind === 8 /* NumericLiteral */) {
+                return nameExpression.text;
+            }
+        }
+        return undefined;
+    }
+    ts.getPropertyNameForPropertyNameNode = getPropertyNameForPropertyNameNode;
+    function getPropertyNameForKnownSymbolName(symbolName) {
+        return "__@" + symbolName;
+    }
+    ts.getPropertyNameForKnownSymbolName = getPropertyNameForKnownSymbolName;
+    /**
+     * Includes the word "Symbol" with unicode escapes
+     */
+    function isESSymbolIdentifier(node) {
+        return node.kind === 69 /* Identifier */ && node.text === "Symbol";
+    }
+    ts.isESSymbolIdentifier = isESSymbolIdentifier;
+    function isModifierKind(token) {
+        switch (token) {
+            case 115 /* AbstractKeyword */:
+            case 118 /* AsyncKeyword */:
+            case 74 /* ConstKeyword */:
+            case 122 /* DeclareKeyword */:
+            case 77 /* DefaultKeyword */:
+            case 82 /* ExportKeyword */:
+            case 112 /* PublicKeyword */:
+            case 110 /* PrivateKeyword */:
+            case 111 /* ProtectedKeyword */:
+            case 128 /* ReadonlyKeyword */:
+            case 113 /* StaticKeyword */:
+                return true;
+        }
+        return false;
+    }
+    ts.isModifierKind = isModifierKind;
+    function isParameterDeclaration(node) {
+        var root = getRootDeclaration(node);
+        return root.kind === 142 /* Parameter */;
+    }
+    ts.isParameterDeclaration = isParameterDeclaration;
+    function getRootDeclaration(node) {
+        while (node.kind === 169 /* BindingElement */) {
+            node = node.parent.parent;
+        }
+        return node;
+    }
+    ts.getRootDeclaration = getRootDeclaration;
+    function nodeStartsNewLexicalEnvironment(n) {
+        return isFunctionLike(n) || n.kind === 225 /* ModuleDeclaration */ || n.kind === 256 /* SourceFile */;
+    }
+    ts.nodeStartsNewLexicalEnvironment = nodeStartsNewLexicalEnvironment;
+    /**
+     * Creates a shallow, memberwise clone of a node. The "kind", "pos", "end", "flags", and "parent"
+     * properties are excluded by default, and can be provided via the "location", "flags", and
+     * "parent" parameters.
+     * @param node The node to clone.
+     * @param location An optional TextRange to use to supply the new position.
+     * @param flags The NodeFlags to use for the cloned node.
+     * @param parent The parent for the new node.
+     */
+    function cloneNode(node, location, flags, parent) {
+        // We don't use "clone" from core.ts here, as we need to preserve the prototype chain of
+        // the original node. We also need to exclude specific properties and only include own-
+        // properties (to skip members already defined on the shared prototype).
+        var clone = location !== undefined
+            ? ts.createNode(node.kind, location.pos, location.end)
+            : createSynthesizedNode(node.kind);
+        for (var key in node) {
+            if (clone.hasOwnProperty(key) || !node.hasOwnProperty(key)) {
+                continue;
+            }
+            clone[key] = node[key];
+        }
+        if (flags !== undefined) {
+            clone.flags = flags;
+        }
+        if (parent !== undefined) {
+            clone.parent = parent;
+        }
+        return clone;
+    }
+    ts.cloneNode = cloneNode;
+    /**
+     * Creates a deep clone of an EntityName, with new parent pointers.
+     * @param node The EntityName to clone.
+     * @param parent The parent for the cloned node.
+     */
+    function cloneEntityName(node, parent) {
+        var clone = cloneNode(node, node, node.flags, parent);
+        if (isQualifiedName(clone)) {
+            var left = clone.left, right = clone.right;
+            clone.left = cloneEntityName(left, clone);
+            clone.right = cloneNode(right, right, right.flags, parent);
+        }
+        return clone;
+    }
+    ts.cloneEntityName = cloneEntityName;
+    function isQualifiedName(node) {
+        return node.kind === 139 /* QualifiedName */;
+    }
+    ts.isQualifiedName = isQualifiedName;
+    function nodeIsSynthesized(node) {
+        return node.pos === -1;
+    }
+    ts.nodeIsSynthesized = nodeIsSynthesized;
+    function createSynthesizedNode(kind, startsOnNewLine) {
+        var node = ts.createNode(kind, /* pos */ -1, /* end */ -1);
+        node.startsOnNewLine = startsOnNewLine;
+        return node;
+    }
+    ts.createSynthesizedNode = createSynthesizedNode;
+    function createSynthesizedNodeArray() {
+        var array = [];
+        array.pos = -1;
+        array.end = -1;
+        return array;
+    }
+    ts.createSynthesizedNodeArray = createSynthesizedNodeArray;
+    function createDiagnosticCollection() {
+        var nonFileDiagnostics = [];
+        var fileDiagnostics = {};
+        var diagnosticsModified = false;
+        var modificationCount = 0;
+        return {
+            add: add,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getDiagnostics: getDiagnostics,
+            getModificationCount: getModificationCount,
+            reattachFileDiagnostics: reattachFileDiagnostics
+        };
+        function getModificationCount() {
+            return modificationCount;
+        }
+        function reattachFileDiagnostics(newFile) {
+            if (!ts.hasProperty(fileDiagnostics, newFile.fileName)) {
+                return;
+            }
+            for (var _i = 0, _a = fileDiagnostics[newFile.fileName]; _i < _a.length; _i++) {
+                var diagnostic = _a[_i];
+                diagnostic.file = newFile;
+            }
+        }
+        function add(diagnostic) {
+            var diagnostics;
+            if (diagnostic.file) {
+                diagnostics = fileDiagnostics[diagnostic.file.fileName];
+                if (!diagnostics) {
+                    diagnostics = [];
+                    fileDiagnostics[diagnostic.file.fileName] = diagnostics;
+                }
+            }
+            else {
+                diagnostics = nonFileDiagnostics;
+            }
+            diagnostics.push(diagnostic);
+            diagnosticsModified = true;
+            modificationCount++;
+        }
+        function getGlobalDiagnostics() {
+            sortAndDeduplicate();
+            return nonFileDiagnostics;
+        }
+        function getDiagnostics(fileName) {
+            sortAndDeduplicate();
+            if (fileName) {
+                return fileDiagnostics[fileName] || [];
+            }
+            var allDiagnostics = [];
+            function pushDiagnostic(d) {
+                allDiagnostics.push(d);
+            }
+            ts.forEach(nonFileDiagnostics, pushDiagnostic);
+            for (var key in fileDiagnostics) {
+                if (ts.hasProperty(fileDiagnostics, key)) {
+                    ts.forEach(fileDiagnostics[key], pushDiagnostic);
+                }
+            }
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function sortAndDeduplicate() {
+            if (!diagnosticsModified) {
+                return;
+            }
+            diagnosticsModified = false;
+            nonFileDiagnostics = ts.sortAndDeduplicateDiagnostics(nonFileDiagnostics);
+            for (var key in fileDiagnostics) {
+                if (ts.hasProperty(fileDiagnostics, key)) {
+                    fileDiagnostics[key] = ts.sortAndDeduplicateDiagnostics(fileDiagnostics[key]);
+                }
+            }
+        }
+    }
+    ts.createDiagnosticCollection = createDiagnosticCollection;
+    // This consists of the first 19 unprintable ASCII characters, canonical escapes, lineSeparator,
+    // paragraphSeparator, and nextLine. The latter three are just desirable to suppress new lines in
+    // the language service. These characters should be escaped when printing, and if any characters are added,
+    // the map below must be updated. Note that this regexp *does not* include the 'delete' character.
+    // There is no reason for this other than that JSON.stringify does not handle it either.
+    var escapedCharsRegExp = /[\\\"\u0000-\u001f\t\v\f\b\r\n\u2028\u2029\u0085]/g;
+    var escapedCharsMap = {
+        "\0": "\\0",
+        "\t": "\\t",
+        "\v": "\\v",
+        "\f": "\\f",
+        "\b": "\\b",
+        "\r": "\\r",
+        "\n": "\\n",
+        "\\": "\\\\",
+        "\"": "\\\"",
+        "\u2028": "\\u2028",
+        "\u2029": "\\u2029",
+        "\u0085": "\\u0085" // nextLine
+    };
+    /**
+     * Based heavily on the abstract 'Quote'/'QuoteJSONString' operation from ECMA-262 (24.3.2.2),
+     * but augmented for a few select characters (e.g. lineSeparator, paragraphSeparator, nextLine)
+     * Note that this doesn't actually wrap the input in double quotes.
+     */
+    function escapeString(s) {
+        s = escapedCharsRegExp.test(s) ? s.replace(escapedCharsRegExp, getReplacement) : s;
+        return s;
+        function getReplacement(c) {
+            return escapedCharsMap[c] || get16BitUnicodeEscapeSequence(c.charCodeAt(0));
+        }
+    }
+    ts.escapeString = escapeString;
+    function isIntrinsicJsxName(name) {
+        var ch = name.substr(0, 1);
+        return ch.toLowerCase() === ch;
+    }
+    ts.isIntrinsicJsxName = isIntrinsicJsxName;
+    function get16BitUnicodeEscapeSequence(charCode) {
+        var hexCharCode = charCode.toString(16).toUpperCase();
+        var paddedHexCode = ("0000" + hexCharCode).slice(-4);
+        return "\\u" + paddedHexCode;
+    }
+    var nonAsciiCharacters = /[^\u0000-\u007F]/g;
+    function escapeNonAsciiCharacters(s) {
+        // Replace non-ASCII characters with '\uNNNN' escapes if any exist.
+        // Otherwise just return the original string.
+        return nonAsciiCharacters.test(s) ?
+            s.replace(nonAsciiCharacters, function (c) { return get16BitUnicodeEscapeSequence(c.charCodeAt(0)); }) :
+            s;
+    }
+    ts.escapeNonAsciiCharacters = escapeNonAsciiCharacters;
+    var indentStrings = ["", "    "];
+    function getIndentString(level) {
+        if (indentStrings[level] === undefined) {
+            indentStrings[level] = getIndentString(level - 1) + indentStrings[1];
+        }
+        return indentStrings[level];
+    }
+    ts.getIndentString = getIndentString;
+    function getIndentSize() {
+        return indentStrings[1].length;
+    }
+    ts.getIndentSize = getIndentSize;
+    function createTextWriter(newLine) {
+        var output;
+        var indent;
+        var lineStart;
+        var lineCount;
+        var linePos;
+        function write(s) {
+            if (s && s.length) {
+                if (lineStart) {
+                    output += getIndentString(indent);
+                    lineStart = false;
+                }
+                output += s;
+            }
+        }
+        function reset() {
+            output = "";
+            indent = 0;
+            lineStart = true;
+            lineCount = 0;
+            linePos = 0;
+        }
+        function rawWrite(s) {
+            if (s !== undefined) {
+                if (lineStart) {
+                    lineStart = false;
+                }
+                output += s;
+            }
+        }
+        function writeLiteral(s) {
+            if (s && s.length) {
+                write(s);
+                var lineStartsOfS = ts.computeLineStarts(s);
+                if (lineStartsOfS.length > 1) {
+                    lineCount = lineCount + lineStartsOfS.length - 1;
+                    linePos = output.length - s.length + ts.lastOrUndefined(lineStartsOfS);
+                }
+            }
+        }
+        function writeLine() {
+            if (!lineStart) {
+                output += newLine;
+                lineCount++;
+                linePos = output.length;
+                lineStart = true;
+            }
+        }
+        function writeTextOfNode(text, node) {
+            write(getTextOfNodeFromSourceText(text, node));
+        }
+        reset();
+        return {
+            write: write,
+            rawWrite: rawWrite,
+            writeTextOfNode: writeTextOfNode,
+            writeLiteral: writeLiteral,
+            writeLine: writeLine,
+            increaseIndent: function () { indent++; },
+            decreaseIndent: function () { indent--; },
+            getIndent: function () { return indent; },
+            getTextPos: function () { return output.length; },
+            getLine: function () { return lineCount + 1; },
+            getColumn: function () { return lineStart ? indent * getIndentSize() + 1 : output.length - linePos + 1; },
+            getText: function () { return output; },
+            reset: reset
+        };
+    }
+    ts.createTextWriter = createTextWriter;
+    /**
+     * Resolves a local path to a path which is absolute to the base of the emit
+     */
+    function getExternalModuleNameFromPath(host, fileName) {
+        var getCanonicalFileName = function (f) { return host.getCanonicalFileName(f); };
+        var dir = ts.toPath(host.getCommonSourceDirectory(), host.getCurrentDirectory(), getCanonicalFileName);
+        var filePath = ts.getNormalizedAbsolutePath(fileName, host.getCurrentDirectory());
+        var relativePath = ts.getRelativePathToDirectoryOrUrl(dir, filePath, dir, getCanonicalFileName, /*isAbsolutePathAnUrl*/ false);
+        return ts.removeFileExtension(relativePath);
+    }
+    ts.getExternalModuleNameFromPath = getExternalModuleNameFromPath;
+    function getOwnEmitOutputFilePath(sourceFile, host, extension) {
+        var compilerOptions = host.getCompilerOptions();
+        var emitOutputFilePathWithoutExtension;
+        if (compilerOptions.outDir) {
+            emitOutputFilePathWithoutExtension = ts.removeFileExtension(getSourceFilePathInNewDir(sourceFile, host, compilerOptions.outDir));
+        }
+        else {
+            emitOutputFilePathWithoutExtension = ts.removeFileExtension(sourceFile.fileName);
+        }
+        return emitOutputFilePathWithoutExtension + extension;
+    }
+    ts.getOwnEmitOutputFilePath = getOwnEmitOutputFilePath;
+    function getDeclarationEmitOutputFilePath(sourceFile, host) {
+        var options = host.getCompilerOptions();
+        var outputDir = options.declarationDir || options.outDir; // Prefer declaration folder if specified
+        if (options.declaration) {
+            var path = outputDir
+                ? getSourceFilePathInNewDir(sourceFile, host, outputDir)
+                : sourceFile.fileName;
+            return ts.removeFileExtension(path) + ".d.ts";
+        }
+    }
+    ts.getDeclarationEmitOutputFilePath = getDeclarationEmitOutputFilePath;
+    function getEmitScriptTarget(compilerOptions) {
+        return compilerOptions.target || 0 /* ES3 */;
+    }
+    ts.getEmitScriptTarget = getEmitScriptTarget;
+    function getEmitModuleKind(compilerOptions) {
+        return typeof compilerOptions.module === "number" ?
+            compilerOptions.module :
+            getEmitScriptTarget(compilerOptions) === 2 /* ES6 */ ? ts.ModuleKind.ES6 : ts.ModuleKind.CommonJS;
+    }
+    ts.getEmitModuleKind = getEmitModuleKind;
+    function forEachExpectedEmitFile(host, action, targetSourceFile) {
+        var options = host.getCompilerOptions();
+        // Emit on each source file
+        if (options.outFile || options.out) {
+            onBundledEmit(host);
+        }
+        else {
+            var sourceFiles = targetSourceFile === undefined ? host.getSourceFiles() : [targetSourceFile];
+            for (var _i = 0, sourceFiles_1 = sourceFiles; _i < sourceFiles_1.length; _i++) {
+                var sourceFile = sourceFiles_1[_i];
+                if (!isDeclarationFile(sourceFile)) {
+                    onSingleFileEmit(host, sourceFile);
+                }
+            }
+        }
+        function onSingleFileEmit(host, sourceFile) {
+            // JavaScript files are always LanguageVariant.JSX, as JSX syntax is allowed in .js files also.
+            // So for JavaScript files, '.jsx' is only emitted if the input was '.jsx', and JsxEmit.Preserve.
+            // For TypeScript, the only time to emit with a '.jsx' extension, is on JSX input, and JsxEmit.Preserve
+            var extension = ".js";
+            if (options.jsx === 1 /* Preserve */) {
+                if (isSourceFileJavaScript(sourceFile)) {
+                    if (ts.fileExtensionIs(sourceFile.fileName, ".jsx")) {
+                        extension = ".jsx";
+                    }
+                }
+                else if (sourceFile.languageVariant === 1 /* JSX */) {
+                    // TypeScript source file preserving JSX syntax
+                    extension = ".jsx";
+                }
+            }
+            var jsFilePath = getOwnEmitOutputFilePath(sourceFile, host, extension);
+            var emitFileNames = {
+                jsFilePath: jsFilePath,
+                sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
+                declarationFilePath: !isSourceFileJavaScript(sourceFile) ? getDeclarationEmitOutputFilePath(sourceFile, host) : undefined
+            };
+            action(emitFileNames, [sourceFile], /*isBundledEmit*/ false);
+        }
+        function onBundledEmit(host) {
+            // Can emit only sources that are not declaration file and are either non module code or module with --module or --target es6 specified
+            var bundledSources = ts.filter(host.getSourceFiles(), function (sourceFile) {
+                return !isDeclarationFile(sourceFile) // Not a declaration file
+                    && (!ts.isExternalModule(sourceFile) || !!getEmitModuleKind(options));
+            }); // and not a module, unless module emit enabled
+            if (bundledSources.length) {
+                var jsFilePath = options.outFile || options.out;
+                var emitFileNames = {
+                    jsFilePath: jsFilePath,
+                    sourceMapFilePath: getSourceMapFilePath(jsFilePath, options),
+                    declarationFilePath: options.declaration ? ts.removeFileExtension(jsFilePath) + ".d.ts" : undefined
+                };
+                action(emitFileNames, bundledSources, /*isBundledEmit*/ true);
+            }
+        }
+        function getSourceMapFilePath(jsFilePath, options) {
+            return options.sourceMap ? jsFilePath + ".map" : undefined;
+        }
+    }
+    ts.forEachExpectedEmitFile = forEachExpectedEmitFile;
+    function getSourceFilePathInNewDir(sourceFile, host, newDirPath) {
+        var sourceFilePath = ts.getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
+        sourceFilePath = sourceFilePath.replace(host.getCommonSourceDirectory(), "");
+        return ts.combinePaths(newDirPath, sourceFilePath);
+    }
+    ts.getSourceFilePathInNewDir = getSourceFilePathInNewDir;
+    function writeFile(host, diagnostics, fileName, data, writeByteOrderMark, sourceFiles) {
+        host.writeFile(fileName, data, writeByteOrderMark, function (hostErrorMessage) {
+            diagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Could_not_write_file_0_Colon_1, fileName, hostErrorMessage));
+        }, sourceFiles);
+    }
+    ts.writeFile = writeFile;
+    function getLineOfLocalPosition(currentSourceFile, pos) {
+        return ts.getLineAndCharacterOfPosition(currentSourceFile, pos).line;
+    }
+    ts.getLineOfLocalPosition = getLineOfLocalPosition;
+    function getLineOfLocalPositionFromLineMap(lineMap, pos) {
+        return ts.computeLineAndCharacterOfPosition(lineMap, pos).line;
+    }
+    ts.getLineOfLocalPositionFromLineMap = getLineOfLocalPositionFromLineMap;
+    function getFirstConstructorWithBody(node) {
+        return ts.forEach(node.members, function (member) {
+            if (member.kind === 148 /* Constructor */ && nodeIsPresent(member.body)) {
+                return member;
+            }
+        });
+    }
+    ts.getFirstConstructorWithBody = getFirstConstructorWithBody;
+    function getSetAccessorTypeAnnotationNode(accessor) {
+        if (accessor && accessor.parameters.length > 0) {
+            var hasThis = accessor.parameters.length === 2 &&
+                accessor.parameters[0].name.kind === 69 /* Identifier */ &&
+                accessor.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */;
+            return accessor.parameters[hasThis ? 1 : 0].type;
+        }
+    }
+    ts.getSetAccessorTypeAnnotationNode = getSetAccessorTypeAnnotationNode;
+    function getAllAccessorDeclarations(declarations, accessor) {
+        var firstAccessor;
+        var secondAccessor;
+        var getAccessor;
+        var setAccessor;
+        if (hasDynamicName(accessor)) {
+            firstAccessor = accessor;
+            if (accessor.kind === 149 /* GetAccessor */) {
+                getAccessor = accessor;
+            }
+            else if (accessor.kind === 150 /* SetAccessor */) {
+                setAccessor = accessor;
+            }
+            else {
+                ts.Debug.fail("Accessor has wrong kind");
+            }
+        }
+        else {
+            ts.forEach(declarations, function (member) {
+                if ((member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */)
+                    && (member.flags & 32 /* Static */) === (accessor.flags & 32 /* Static */)) {
+                    var memberName = getPropertyNameForPropertyNameNode(member.name);
+                    var accessorName = getPropertyNameForPropertyNameNode(accessor.name);
+                    if (memberName === accessorName) {
+                        if (!firstAccessor) {
+                            firstAccessor = member;
+                        }
+                        else if (!secondAccessor) {
+                            secondAccessor = member;
+                        }
+                        if (member.kind === 149 /* GetAccessor */ && !getAccessor) {
+                            getAccessor = member;
+                        }
+                        if (member.kind === 150 /* SetAccessor */ && !setAccessor) {
+                            setAccessor = member;
+                        }
+                    }
+                }
+            });
+        }
+        return {
+            firstAccessor: firstAccessor,
+            secondAccessor: secondAccessor,
+            getAccessor: getAccessor,
+            setAccessor: setAccessor
+        };
+    }
+    ts.getAllAccessorDeclarations = getAllAccessorDeclarations;
+    function emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments) {
+        // If the leading comments start on different line than the start of node, write new line
+        if (leadingComments && leadingComments.length && node.pos !== leadingComments[0].pos &&
+            getLineOfLocalPositionFromLineMap(lineMap, node.pos) !== getLineOfLocalPositionFromLineMap(lineMap, leadingComments[0].pos)) {
+            writer.writeLine();
+        }
+    }
+    ts.emitNewLineBeforeLeadingComments = emitNewLineBeforeLeadingComments;
+    function emitComments(text, lineMap, writer, comments, trailingSeparator, newLine, writeComment) {
+        var emitLeadingSpace = !trailingSeparator;
+        ts.forEach(comments, function (comment) {
+            if (emitLeadingSpace) {
+                writer.write(" ");
+                emitLeadingSpace = false;
+            }
+            writeComment(text, lineMap, writer, comment, newLine);
+            if (comment.hasTrailingNewLine) {
+                writer.writeLine();
+            }
+            else if (trailingSeparator) {
+                writer.write(" ");
+            }
+            else {
+                // Emit leading space to separate comment during next comment emit
+                emitLeadingSpace = true;
+            }
+        });
+    }
+    ts.emitComments = emitComments;
+    /**
+     * Detached comment is a comment at the top of file or function body that is separated from
+     * the next statement by space.
+     */
+    function emitDetachedComments(text, lineMap, writer, writeComment, node, newLine, removeComments) {
+        var leadingComments;
+        var currentDetachedCommentInfo;
+        if (removeComments) {
+            // removeComments is true, only reserve pinned comment at the top of file
+            // For example:
+            //      /*! Pinned Comment */
+            //
+            //      var x = 10;
+            if (node.pos === 0) {
+                leadingComments = ts.filter(ts.getLeadingCommentRanges(text, node.pos), isPinnedComment);
+            }
+        }
+        else {
+            // removeComments is false, just get detached as normal and bypass the process to filter comment
+            leadingComments = ts.getLeadingCommentRanges(text, node.pos);
+        }
+        if (leadingComments) {
+            var detachedComments = [];
+            var lastComment = void 0;
+            for (var _i = 0, leadingComments_1 = leadingComments; _i < leadingComments_1.length; _i++) {
+                var comment = leadingComments_1[_i];
+                if (lastComment) {
+                    var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, lastComment.end);
+                    var commentLine = getLineOfLocalPositionFromLineMap(lineMap, comment.pos);
+                    if (commentLine >= lastCommentLine + 2) {
+                        // There was a blank line between the last comment and this comment.  This
+                        // comment is not part of the copyright comments.  Return what we have so
+                        // far.
+                        break;
+                    }
+                }
+                detachedComments.push(comment);
+                lastComment = comment;
+            }
+            if (detachedComments.length) {
+                // All comments look like they could have been part of the copyright header.  Make
+                // sure there is at least one blank line between it and the node.  If not, it's not
+                // a copyright header.
+                var lastCommentLine = getLineOfLocalPositionFromLineMap(lineMap, ts.lastOrUndefined(detachedComments).end);
+                var nodeLine = getLineOfLocalPositionFromLineMap(lineMap, ts.skipTrivia(text, node.pos));
+                if (nodeLine >= lastCommentLine + 2) {
+                    // Valid detachedComments
+                    emitNewLineBeforeLeadingComments(lineMap, writer, node, leadingComments);
+                    emitComments(text, lineMap, writer, detachedComments, /*trailingSeparator*/ true, newLine, writeComment);
+                    currentDetachedCommentInfo = { nodePos: node.pos, detachedCommentEndPos: ts.lastOrUndefined(detachedComments).end };
+                }
+            }
+        }
+        return currentDetachedCommentInfo;
+        function isPinnedComment(comment) {
+            return text.charCodeAt(comment.pos + 1) === 42 /* asterisk */ &&
+                text.charCodeAt(comment.pos + 2) === 33 /* exclamation */;
+        }
+    }
+    ts.emitDetachedComments = emitDetachedComments;
+    function writeCommentRange(text, lineMap, writer, comment, newLine) {
+        if (text.charCodeAt(comment.pos + 1) === 42 /* asterisk */) {
+            var firstCommentLineAndCharacter = ts.computeLineAndCharacterOfPosition(lineMap, comment.pos);
+            var lineCount = lineMap.length;
+            var firstCommentLineIndent = void 0;
+            for (var pos = comment.pos, currentLine = firstCommentLineAndCharacter.line; pos < comment.end; currentLine++) {
+                var nextLineStart = (currentLine + 1) === lineCount
+                    ? text.length + 1
+                    : lineMap[currentLine + 1];
+                if (pos !== comment.pos) {
+                    // If we are not emitting first line, we need to write the spaces to adjust the alignment
+                    if (firstCommentLineIndent === undefined) {
+                        firstCommentLineIndent = calculateIndent(text, lineMap[firstCommentLineAndCharacter.line], comment.pos);
+                    }
+                    // These are number of spaces writer is going to write at current indent
+                    var currentWriterIndentSpacing = writer.getIndent() * getIndentSize();
+                    // Number of spaces we want to be writing
+                    // eg: Assume writer indent
+                    // module m {
+                    //         /* starts at character 9 this is line 1
+                    //    * starts at character pos 4 line                        --1  = 8 - 8 + 3
+                    //   More left indented comment */                            --2  = 8 - 8 + 2
+                    //     class c { }
+                    // }
+                    // module m {
+                    //     /* this is line 1 -- Assume current writer indent 8
+                    //      * line                                                --3 = 8 - 4 + 5
+                    //            More right indented comment */                  --4 = 8 - 4 + 11
+                    //     class c { }
+                    // }
+                    var spacesToEmit = currentWriterIndentSpacing - firstCommentLineIndent + calculateIndent(text, pos, nextLineStart);
+                    if (spacesToEmit > 0) {
+                        var numberOfSingleSpacesToEmit = spacesToEmit % getIndentSize();
+                        var indentSizeSpaceString = getIndentString((spacesToEmit - numberOfSingleSpacesToEmit) / getIndentSize());
+                        // Write indent size string ( in eg 1: = "", 2: "" , 3: string with 8 spaces 4: string with 12 spaces
+                        writer.rawWrite(indentSizeSpaceString);
+                        // Emit the single spaces (in eg: 1: 3 spaces, 2: 2 spaces, 3: 1 space, 4: 3 spaces)
+                        while (numberOfSingleSpacesToEmit) {
+                            writer.rawWrite(" ");
+                            numberOfSingleSpacesToEmit--;
+                        }
+                    }
+                    else {
+                        // No spaces to emit write empty string
+                        writer.rawWrite("");
+                    }
+                }
+                // Write the comment line text
+                writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart);
+                pos = nextLineStart;
+            }
+        }
+        else {
+            // Single line comment of style //....
+            writer.write(text.substring(comment.pos, comment.end));
+        }
+    }
+    ts.writeCommentRange = writeCommentRange;
+    function writeTrimmedCurrentLine(text, comment, writer, newLine, pos, nextLineStart) {
+        var end = Math.min(comment.end, nextLineStart - 1);
+        var currentLineText = text.substring(pos, end).replace(/^\s+|\s+$/g, "");
+        if (currentLineText) {
+            // trimmed forward and ending spaces text
+            writer.write(currentLineText);
+            if (end !== comment.end) {
+                writer.writeLine();
+            }
+        }
+        else {
+            // Empty string - make sure we write empty line
+            writer.writeLiteral(newLine);
+        }
+    }
+    function calculateIndent(text, pos, end) {
+        var currentLineIndent = 0;
+        for (; pos < end && ts.isWhiteSpace(text.charCodeAt(pos)); pos++) {
+            if (text.charCodeAt(pos) === 9 /* tab */) {
+                // Tabs = TabSize = indent size and go to next tabStop
+                currentLineIndent += getIndentSize() - (currentLineIndent % getIndentSize());
+            }
+            else {
+                // Single space
+                currentLineIndent++;
+            }
+        }
+        return currentLineIndent;
+    }
+    function modifierToFlag(token) {
+        switch (token) {
+            case 113 /* StaticKeyword */: return 32 /* Static */;
+            case 112 /* PublicKeyword */: return 4 /* Public */;
+            case 111 /* ProtectedKeyword */: return 16 /* Protected */;
+            case 110 /* PrivateKeyword */: return 8 /* Private */;
+            case 115 /* AbstractKeyword */: return 128 /* Abstract */;
+            case 82 /* ExportKeyword */: return 1 /* Export */;
+            case 122 /* DeclareKeyword */: return 2 /* Ambient */;
+            case 74 /* ConstKeyword */: return 2048 /* Const */;
+            case 77 /* DefaultKeyword */: return 512 /* Default */;
+            case 118 /* AsyncKeyword */: return 256 /* Async */;
+            case 128 /* ReadonlyKeyword */: return 64 /* Readonly */;
+        }
+        return 0;
+    }
+    ts.modifierToFlag = modifierToFlag;
+    function isLeftHandSideExpression(expr) {
+        if (expr) {
+            switch (expr.kind) {
+                case 172 /* PropertyAccessExpression */:
+                case 173 /* ElementAccessExpression */:
+                case 175 /* NewExpression */:
+                case 174 /* CallExpression */:
+                case 196 /* NonNullExpression */:
+                case 241 /* JsxElement */:
+                case 242 /* JsxSelfClosingElement */:
+                case 176 /* TaggedTemplateExpression */:
+                case 170 /* ArrayLiteralExpression */:
+                case 178 /* ParenthesizedExpression */:
+                case 171 /* ObjectLiteralExpression */:
+                case 192 /* ClassExpression */:
+                case 179 /* FunctionExpression */:
+                case 69 /* Identifier */:
+                case 10 /* RegularExpressionLiteral */:
+                case 8 /* NumericLiteral */:
+                case 9 /* StringLiteral */:
+                case 11 /* NoSubstitutionTemplateLiteral */:
+                case 189 /* TemplateExpression */:
+                case 84 /* FalseKeyword */:
+                case 93 /* NullKeyword */:
+                case 97 /* ThisKeyword */:
+                case 99 /* TrueKeyword */:
+                case 95 /* SuperKeyword */:
+                    return true;
+            }
+        }
+        return false;
+    }
+    ts.isLeftHandSideExpression = isLeftHandSideExpression;
+    function isAssignmentOperator(token) {
+        return token >= 56 /* FirstAssignment */ && token <= 68 /* LastAssignment */;
+    }
+    ts.isAssignmentOperator = isAssignmentOperator;
+    function isExpressionWithTypeArgumentsInClassExtendsClause(node) {
+        return node.kind === 194 /* ExpressionWithTypeArguments */ &&
+            node.parent.token === 83 /* ExtendsKeyword */ &&
+            isClassLike(node.parent.parent);
+    }
+    ts.isExpressionWithTypeArgumentsInClassExtendsClause = isExpressionWithTypeArgumentsInClassExtendsClause;
+    // Returns false if this heritage clause element's expression contains something unsupported
+    // (i.e. not a name or dotted name).
+    function isSupportedExpressionWithTypeArguments(node) {
+        return isSupportedExpressionWithTypeArgumentsRest(node.expression);
+    }
+    ts.isSupportedExpressionWithTypeArguments = isSupportedExpressionWithTypeArguments;
+    function isSupportedExpressionWithTypeArgumentsRest(node) {
+        if (node.kind === 69 /* Identifier */) {
+            return true;
+        }
+        else if (isPropertyAccessExpression(node)) {
+            return isSupportedExpressionWithTypeArgumentsRest(node.expression);
+        }
+        else {
+            return false;
+        }
+    }
+    function isRightSideOfQualifiedNameOrPropertyAccess(node) {
+        return (node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node) ||
+            (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node);
+    }
+    ts.isRightSideOfQualifiedNameOrPropertyAccess = isRightSideOfQualifiedNameOrPropertyAccess;
+    function isEmptyObjectLiteralOrArrayLiteral(expression) {
+        var kind = expression.kind;
+        if (kind === 171 /* ObjectLiteralExpression */) {
+            return expression.properties.length === 0;
+        }
+        if (kind === 170 /* ArrayLiteralExpression */) {
+            return expression.elements.length === 0;
+        }
+        return false;
+    }
+    ts.isEmptyObjectLiteralOrArrayLiteral = isEmptyObjectLiteralOrArrayLiteral;
+    function getLocalSymbolForExportDefault(symbol) {
+        return symbol && symbol.valueDeclaration && (symbol.valueDeclaration.flags & 512 /* Default */) ? symbol.valueDeclaration.localSymbol : undefined;
+    }
+    ts.getLocalSymbolForExportDefault = getLocalSymbolForExportDefault;
+    function hasJavaScriptFileExtension(fileName) {
+        return ts.forEach(ts.supportedJavascriptExtensions, function (extension) { return ts.fileExtensionIs(fileName, extension); });
+    }
+    ts.hasJavaScriptFileExtension = hasJavaScriptFileExtension;
+    /**
+     * Replace each instance of non-ascii characters by one, two, three, or four escape sequences
+     * representing the UTF-8 encoding of the character, and return the expanded char code list.
+     */
+    function getExpandedCharCodes(input) {
+        var output = [];
+        var length = input.length;
+        for (var i = 0; i < length; i++) {
+            var charCode = input.charCodeAt(i);
+            // handel utf8
+            if (charCode < 0x80) {
+                output.push(charCode);
+            }
+            else if (charCode < 0x800) {
+                output.push((charCode >> 6) | 192);
+                output.push((charCode & 63) | 128);
+            }
+            else if (charCode < 0x10000) {
+                output.push((charCode >> 12) | 224);
+                output.push(((charCode >> 6) & 63) | 128);
+                output.push((charCode & 63) | 128);
+            }
+            else if (charCode < 0x20000) {
+                output.push((charCode >> 18) | 240);
+                output.push(((charCode >> 12) & 63) | 128);
+                output.push(((charCode >> 6) & 63) | 128);
+                output.push((charCode & 63) | 128);
+            }
+            else {
+                ts.Debug.assert(false, "Unexpected code point");
+            }
+        }
+        return output;
+    }
+    /**
+     * Serialize an object graph into a JSON string. This is intended only for use on an acyclic graph
+     * as the fallback implementation does not check for circular references by default.
+     */
+    ts.stringify = typeof JSON !== "undefined" && JSON.stringify
+        ? JSON.stringify
+        : stringifyFallback;
+    /**
+     * Serialize an object graph into a JSON string.
+     */
+    function stringifyFallback(value) {
+        // JSON.stringify returns `undefined` here, instead of the string "undefined".
+        return value === undefined ? undefined : stringifyValue(value);
+    }
+    function stringifyValue(value) {
+        return typeof value === "string" ? "\"" + escapeString(value) + "\""
+            : typeof value === "number" ? isFinite(value) ? String(value) : "null"
+                : typeof value === "boolean" ? value ? "true" : "false"
+                    : typeof value === "object" && value ? ts.isArray(value) ? cycleCheck(stringifyArray, value) : cycleCheck(stringifyObject, value)
+                        : "null";
+    }
+    function cycleCheck(cb, value) {
+        ts.Debug.assert(!value.hasOwnProperty("__cycle"), "Converting circular structure to JSON");
+        value.__cycle = true;
+        var result = cb(value);
+        delete value.__cycle;
+        return result;
+    }
+    function stringifyArray(value) {
+        return "[" + ts.reduceLeft(value, stringifyElement, "") + "]";
+    }
+    function stringifyElement(memo, value) {
+        return (memo ? memo + "," : memo) + stringifyValue(value);
+    }
+    function stringifyObject(value) {
+        return "{" + ts.reduceProperties(value, stringifyProperty, "") + "}";
+    }
+    function stringifyProperty(memo, value, key) {
+        return value === undefined || typeof value === "function" || key === "__cycle" ? memo
+            : (memo ? memo + "," : memo) + ("\"" + escapeString(key) + "\":" + stringifyValue(value));
+    }
+    var base64Digits = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";
+    /**
+     * Converts a string to a base-64 encoded ASCII string.
+     */
+    function convertToBase64(input) {
+        var result = "";
+        var charCodes = getExpandedCharCodes(input);
+        var i = 0;
+        var length = charCodes.length;
+        var byte1, byte2, byte3, byte4;
+        while (i < length) {
+            // Convert every 6-bits in the input 3 character points
+            // into a base64 digit
+            byte1 = charCodes[i] >> 2;
+            byte2 = (charCodes[i] & 3) << 4 | charCodes[i + 1] >> 4;
+            byte3 = (charCodes[i + 1] & 15) << 2 | charCodes[i + 2] >> 6;
+            byte4 = charCodes[i + 2] & 63;
+            // We are out of characters in the input, set the extra
+            // digits to 64 (padding character).
+            if (i + 1 >= length) {
+                byte3 = byte4 = 64;
+            }
+            else if (i + 2 >= length) {
+                byte4 = 64;
+            }
+            // Write to the output
+            result += base64Digits.charAt(byte1) + base64Digits.charAt(byte2) + base64Digits.charAt(byte3) + base64Digits.charAt(byte4);
+            i += 3;
+        }
+        return result;
+    }
+    ts.convertToBase64 = convertToBase64;
+    function convertToRelativePath(absoluteOrRelativePath, basePath, getCanonicalFileName) {
+        return !ts.isRootedDiskPath(absoluteOrRelativePath)
+            ? absoluteOrRelativePath
+            : ts.getRelativePathToDirectoryOrUrl(basePath, absoluteOrRelativePath, basePath, getCanonicalFileName, /* isAbsolutePathAnUrl */ false);
+    }
+    ts.convertToRelativePath = convertToRelativePath;
+    var carriageReturnLineFeed = "\r\n";
+    var lineFeed = "\n";
+    function getNewLineCharacter(options) {
+        if (options.newLine === 0 /* CarriageReturnLineFeed */) {
+            return carriageReturnLineFeed;
+        }
+        else if (options.newLine === 1 /* LineFeed */) {
+            return lineFeed;
+        }
+        else if (ts.sys) {
+            return ts.sys.newLine;
+        }
+        return carriageReturnLineFeed;
+    }
+    ts.getNewLineCharacter = getNewLineCharacter;
+    function isWatchSet(options) {
+        // Firefox has Object.prototype.watch
+        return options.watch && options.hasOwnProperty("watch");
+    }
+    ts.isWatchSet = isWatchSet;
+})(ts || (ts = {}));
+var ts;
+(function (ts) {
+    function getDefaultLibFileName(options) {
+        return options.target === 2 /* ES6 */ ? "lib.es6.d.ts" : "lib.d.ts";
+    }
+    ts.getDefaultLibFileName = getDefaultLibFileName;
+    function textSpanEnd(span) {
+        return span.start + span.length;
+    }
+    ts.textSpanEnd = textSpanEnd;
+    function textSpanIsEmpty(span) {
+        return span.length === 0;
+    }
+    ts.textSpanIsEmpty = textSpanIsEmpty;
+    function textSpanContainsPosition(span, position) {
+        return position >= span.start && position < textSpanEnd(span);
+    }
+    ts.textSpanContainsPosition = textSpanContainsPosition;
+    // Returns true if 'span' contains 'other'.
+    function textSpanContainsTextSpan(span, other) {
+        return other.start >= span.start && textSpanEnd(other) <= textSpanEnd(span);
+    }
+    ts.textSpanContainsTextSpan = textSpanContainsTextSpan;
+    function textSpanOverlapsWith(span, other) {
+        var overlapStart = Math.max(span.start, other.start);
+        var overlapEnd = Math.min(textSpanEnd(span), textSpanEnd(other));
+        return overlapStart < overlapEnd;
+    }
+    ts.textSpanOverlapsWith = textSpanOverlapsWith;
+    function textSpanOverlap(span1, span2) {
+        var overlapStart = Math.max(span1.start, span2.start);
+        var overlapEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
+        if (overlapStart < overlapEnd) {
+            return createTextSpanFromBounds(overlapStart, overlapEnd);
+        }
+        return undefined;
+    }
+    ts.textSpanOverlap = textSpanOverlap;
+    function textSpanIntersectsWithTextSpan(span, other) {
+        return other.start <= textSpanEnd(span) && textSpanEnd(other) >= span.start;
+    }
+    ts.textSpanIntersectsWithTextSpan = textSpanIntersectsWithTextSpan;
+    function textSpanIntersectsWith(span, start, length) {
+        var end = start + length;
+        return start <= textSpanEnd(span) && end >= span.start;
+    }
+    ts.textSpanIntersectsWith = textSpanIntersectsWith;
+    function decodedTextSpanIntersectsWith(start1, length1, start2, length2) {
+        var end1 = start1 + length1;
+        var end2 = start2 + length2;
+        return start2 <= end1 && end2 >= start1;
+    }
+    ts.decodedTextSpanIntersectsWith = decodedTextSpanIntersectsWith;
+    function textSpanIntersectsWithPosition(span, position) {
+        return position <= textSpanEnd(span) && position >= span.start;
+    }
+    ts.textSpanIntersectsWithPosition = textSpanIntersectsWithPosition;
+    function textSpanIntersection(span1, span2) {
+        var intersectStart = Math.max(span1.start, span2.start);
+        var intersectEnd = Math.min(textSpanEnd(span1), textSpanEnd(span2));
+        if (intersectStart <= intersectEnd) {
+            return createTextSpanFromBounds(intersectStart, intersectEnd);
+        }
+        return undefined;
+    }
+    ts.textSpanIntersection = textSpanIntersection;
+    function createTextSpan(start, length) {
+        if (start < 0) {
+            throw new Error("start < 0");
+        }
+        if (length < 0) {
+            throw new Error("length < 0");
+        }
+        return { start: start, length: length };
+    }
+    ts.createTextSpan = createTextSpan;
+    function createTextSpanFromBounds(start, end) {
+        return createTextSpan(start, end - start);
+    }
+    ts.createTextSpanFromBounds = createTextSpanFromBounds;
+    function textChangeRangeNewSpan(range) {
+        return createTextSpan(range.span.start, range.newLength);
+    }
+    ts.textChangeRangeNewSpan = textChangeRangeNewSpan;
+    function textChangeRangeIsUnchanged(range) {
+        return textSpanIsEmpty(range.span) && range.newLength === 0;
+    }
+    ts.textChangeRangeIsUnchanged = textChangeRangeIsUnchanged;
+    function createTextChangeRange(span, newLength) {
+        if (newLength < 0) {
+            throw new Error("newLength < 0");
+        }
+        return { span: span, newLength: newLength };
+    }
+    ts.createTextChangeRange = createTextChangeRange;
+    ts.unchangedTextChangeRange = createTextChangeRange(createTextSpan(0, 0), 0);
+    /**
+     * Called to merge all the changes that occurred across several versions of a script snapshot
+     * into a single change.  i.e. if a user keeps making successive edits to a script we will
+     * have a text change from V1 to V2, V2 to V3, ..., Vn.
+     *
+     * This function will then merge those changes into a single change range valid between V1 and
+     * Vn.
+     */
+    function collapseTextChangeRangesAcrossMultipleVersions(changes) {
+        if (changes.length === 0) {
+            return ts.unchangedTextChangeRange;
+        }
+        if (changes.length === 1) {
+            return changes[0];
+        }
+        // We change from talking about { { oldStart, oldLength }, newLength } to { oldStart, oldEnd, newEnd }
+        // as it makes things much easier to reason about.
+        var change0 = changes[0];
+        var oldStartN = change0.span.start;
+        var oldEndN = textSpanEnd(change0.span);
+        var newEndN = oldStartN + change0.newLength;
+        for (var i = 1; i < changes.length; i++) {
+            var nextChange = changes[i];
+            // Consider the following case:
+            // i.e. two edits.  The first represents the text change range { { 10, 50 }, 30 }.  i.e. The span starting
+            // at 10, with length 50 is reduced to length 30.  The second represents the text change range { { 30, 30 }, 40 }.
+            // i.e. the span starting at 30 with length 30 is increased to length 40.
+            //
+            //      0         10        20        30        40        50        60        70        80        90        100
+            //      -------------------------------------------------------------------------------------------------------
+            //                |                                                 /
+            //                |                                            /----
+            //  T1            |                                       /----
+            //                |                                  /----
+            //                |                             /----
+            //      -------------------------------------------------------------------------------------------------------
+            //                                     |                            \
+            //                                     |                               \
+            //   T2                                |                                 \
+            //                                     |                                   \
+            //                                     |                                      \
+            //      -------------------------------------------------------------------------------------------------------
+            //
+            // Merging these turns out to not be too difficult.  First, determining the new start of the change is trivial
+            // it's just the min of the old and new starts.  i.e.:
+            //
+            //      0         10        20        30        40        50        60        70        80        90        100
+            //      ------------------------------------------------------------*------------------------------------------
+            //                |                                                 /
+            //                |                                            /----
+            //  T1            |                                       /----
+            //                |                                  /----
+            //                |                             /----
+            //      ----------------------------------------$-------------------$------------------------------------------
+            //                .                    |                            \
+            //                .                    |                               \
+            //   T2           .                    |                                 \
+            //                .                    |                                   \
+            //                .                    |                                      \
+            //      ----------------------------------------------------------------------*--------------------------------
+            //
+            // (Note the dots represent the newly inferred start.
+            // Determining the new and old end is also pretty simple.  Basically it boils down to paying attention to the
+            // absolute positions at the asterisks, and the relative change between the dollar signs. Basically, we see
+            // which if the two $'s precedes the other, and we move that one forward until they line up.  in this case that
+            // means:
+            //
+            //      0         10        20        30        40        50        60        70        80        90        100
+            //      --------------------------------------------------------------------------------*----------------------
+            //                |                                                                     /
+            //                |                                                                /----
+            //  T1            |                                                           /----
+            //                |                                                      /----
+            //                |                                                 /----
+            //      ------------------------------------------------------------$------------------------------------------
+            //                .                    |                            \
+            //                .                    |                               \
+            //   T2           .                    |                                 \
+            //                .                    |                                   \
+            //                .                    |                                      \
+            //      ----------------------------------------------------------------------*--------------------------------
+            //
+            // In other words (in this case), we're recognizing that the second edit happened after where the first edit
+            // ended with a delta of 20 characters (60 - 40).  Thus, if we go back in time to where the first edit started
+            // that's the same as if we started at char 80 instead of 60.
+            //
+            // As it so happens, the same logic applies if the second edit precedes the first edit.  In that case rather
+            // than pushing the first edit forward to match the second, we'll push the second edit forward to match the
+            // first.
+            //
+            // In this case that means we have { oldStart: 10, oldEnd: 80, newEnd: 70 } or, in TextChangeRange
+            // semantics: { { start: 10, length: 70 }, newLength: 60 }
+            //
+            // The math then works out as follows.
+            // If we have { oldStart1, oldEnd1, newEnd1 } and { oldStart2, oldEnd2, newEnd2 } then we can compute the
+            // final result like so:
+            //
+            // {
+            //      oldStart3: Min(oldStart1, oldStart2),
+            //      oldEnd3  : Max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1)),
+            //      newEnd3  : Max(newEnd2, newEnd2 + (newEnd1 - oldEnd2))
+            // }
+            var oldStart1 = oldStartN;
+            var oldEnd1 = oldEndN;
+            var newEnd1 = newEndN;
+            var oldStart2 = nextChange.span.start;
+            var oldEnd2 = textSpanEnd(nextChange.span);
+            var newEnd2 = oldStart2 + nextChange.newLength;
+            oldStartN = Math.min(oldStart1, oldStart2);
+            oldEndN = Math.max(oldEnd1, oldEnd1 + (oldEnd2 - newEnd1));
+            newEndN = Math.max(newEnd2, newEnd2 + (newEnd1 - oldEnd2));
+        }
+        return createTextChangeRange(createTextSpanFromBounds(oldStartN, oldEndN), /*newLength:*/ newEndN - oldStartN);
+    }
+    ts.collapseTextChangeRangesAcrossMultipleVersions = collapseTextChangeRangesAcrossMultipleVersions;
+    function getTypeParameterOwner(d) {
+        if (d && d.kind === 141 /* TypeParameter */) {
+            for (var current = d; current; current = current.parent) {
+                if (ts.isFunctionLike(current) || ts.isClassLike(current) || current.kind === 222 /* InterfaceDeclaration */) {
+                    return current;
+                }
+            }
+        }
+    }
+    ts.getTypeParameterOwner = getTypeParameterOwner;
+    function isParameterPropertyDeclaration(node) {
+        return node.flags & 92 /* ParameterPropertyModifier */ && node.parent.kind === 148 /* Constructor */ && ts.isClassLike(node.parent.parent);
+    }
+    ts.isParameterPropertyDeclaration = isParameterPropertyDeclaration;
+    function startsWith(str, prefix) {
+        return str.lastIndexOf(prefix, 0) === 0;
+    }
+    ts.startsWith = startsWith;
+    function endsWith(str, suffix) {
+        var expectedPos = str.length - suffix.length;
+        return str.indexOf(suffix, expectedPos) === expectedPos;
+    }
+    ts.endsWith = endsWith;
+})(ts || (ts = {}));
+/// <reference path="utilities.ts"/>
+/// <reference path="scanner.ts"/>
+var ts;
+(function (ts) {
+    /* @internal */ ts.parseTime = 0;
+    var NodeConstructor;
+    var SourceFileConstructor;
+    function createNode(kind, pos, end) {
+        if (kind === 256 /* SourceFile */) {
+            return new (SourceFileConstructor || (SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor()))(kind, pos, end);
+        }
+        else {
+            return new (NodeConstructor || (NodeConstructor = ts.objectAllocator.getNodeConstructor()))(kind, pos, end);
+        }
+    }
+    ts.createNode = createNode;
+    function visitNode(cbNode, node) {
+        if (node) {
+            return cbNode(node);
+        }
+    }
+    function visitNodeArray(cbNodes, nodes) {
+        if (nodes) {
+            return cbNodes(nodes);
+        }
+    }
+    function visitEachNode(cbNode, nodes) {
+        if (nodes) {
+            for (var _i = 0, nodes_1 = nodes; _i < nodes_1.length; _i++) {
+                var node = nodes_1[_i];
+                var result = cbNode(node);
+                if (result) {
+                    return result;
+                }
+            }
+        }
+    }
+    // Invokes a callback for each child of the given node. The 'cbNode' callback is invoked for all child nodes
+    // stored in properties. If a 'cbNodes' callback is specified, it is invoked for embedded arrays; otherwise,
+    // embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
+    // a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
+    function forEachChild(node, cbNode, cbNodeArray) {
+        if (!node) {
+            return;
+        }
+        // The visitXXX functions could be written as local functions that close over the cbNode and cbNodeArray
+        // callback parameters, but that causes a closure allocation for each invocation with noticeable effects
+        // on performance.
+        var visitNodes = cbNodeArray ? visitNodeArray : visitEachNode;
+        var cbNodes = cbNodeArray || cbNode;
+        switch (node.kind) {
+            case 139 /* QualifiedName */:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.right);
+            case 141 /* TypeParameter */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.constraint) ||
+                    visitNode(cbNode, node.expression);
+            case 254 /* ShorthandPropertyAssignment */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.equalsToken) ||
+                    visitNode(cbNode, node.objectAssignmentInitializer);
+            case 142 /* Parameter */:
+            case 145 /* PropertyDeclaration */:
+            case 144 /* PropertySignature */:
+            case 253 /* PropertyAssignment */:
+            case 218 /* VariableDeclaration */:
+            case 169 /* BindingElement */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.dotDotDotToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.initializer);
+            case 156 /* FunctionType */:
+            case 157 /* ConstructorType */:
+            case 151 /* CallSignature */:
+            case 152 /* ConstructSignature */:
+            case 153 /* IndexSignature */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+            case 148 /* Constructor */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 179 /* FunctionExpression */:
+            case 220 /* FunctionDeclaration */:
+            case 180 /* ArrowFunction */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.equalsGreaterThanToken) ||
+                    visitNode(cbNode, node.body);
+            case 155 /* TypeReference */:
+                return visitNode(cbNode, node.typeName) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 154 /* TypePredicate */:
+                return visitNode(cbNode, node.parameterName) ||
+                    visitNode(cbNode, node.type);
+            case 158 /* TypeQuery */:
+                return visitNode(cbNode, node.exprName);
+            case 159 /* TypeLiteral */:
+                return visitNodes(cbNodes, node.members);
+            case 160 /* ArrayType */:
+                return visitNode(cbNode, node.elementType);
+            case 161 /* TupleType */:
+                return visitNodes(cbNodes, node.elementTypes);
+            case 162 /* UnionType */:
+            case 163 /* IntersectionType */:
+                return visitNodes(cbNodes, node.types);
+            case 164 /* ParenthesizedType */:
+                return visitNode(cbNode, node.type);
+            case 167 /* ObjectBindingPattern */:
+            case 168 /* ArrayBindingPattern */:
+                return visitNodes(cbNodes, node.elements);
+            case 170 /* ArrayLiteralExpression */:
+                return visitNodes(cbNodes, node.elements);
+            case 171 /* ObjectLiteralExpression */:
+                return visitNodes(cbNodes, node.properties);
+            case 172 /* PropertyAccessExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.dotToken) ||
+                    visitNode(cbNode, node.name);
+            case 173 /* ElementAccessExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.argumentExpression);
+            case 174 /* CallExpression */:
+            case 175 /* NewExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments) ||
+                    visitNodes(cbNodes, node.arguments);
+            case 176 /* TaggedTemplateExpression */:
+                return visitNode(cbNode, node.tag) ||
+                    visitNode(cbNode, node.template);
+            case 177 /* TypeAssertionExpression */:
+                return visitNode(cbNode, node.type) ||
+                    visitNode(cbNode, node.expression);
+            case 178 /* ParenthesizedExpression */:
+                return visitNode(cbNode, node.expression);
+            case 181 /* DeleteExpression */:
+                return visitNode(cbNode, node.expression);
+            case 182 /* TypeOfExpression */:
+                return visitNode(cbNode, node.expression);
+            case 183 /* VoidExpression */:
+                return visitNode(cbNode, node.expression);
+            case 185 /* PrefixUnaryExpression */:
+                return visitNode(cbNode, node.operand);
+            case 190 /* YieldExpression */:
+                return visitNode(cbNode, node.asteriskToken) ||
+                    visitNode(cbNode, node.expression);
+            case 184 /* AwaitExpression */:
+                return visitNode(cbNode, node.expression);
+            case 186 /* PostfixUnaryExpression */:
+                return visitNode(cbNode, node.operand);
+            case 187 /* BinaryExpression */:
+                return visitNode(cbNode, node.left) ||
+                    visitNode(cbNode, node.operatorToken) ||
+                    visitNode(cbNode, node.right);
+            case 195 /* AsExpression */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.type);
+            case 196 /* NonNullExpression */:
+                return visitNode(cbNode, node.expression);
+            case 188 /* ConditionalExpression */:
+                return visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.questionToken) ||
+                    visitNode(cbNode, node.whenTrue) ||
+                    visitNode(cbNode, node.colonToken) ||
+                    visitNode(cbNode, node.whenFalse);
+            case 191 /* SpreadElementExpression */:
+                return visitNode(cbNode, node.expression);
+            case 199 /* Block */:
+            case 226 /* ModuleBlock */:
+                return visitNodes(cbNodes, node.statements);
+            case 256 /* SourceFile */:
+                return visitNodes(cbNodes, node.statements) ||
+                    visitNode(cbNode, node.endOfFileToken);
+            case 200 /* VariableStatement */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.declarationList);
+            case 219 /* VariableDeclarationList */:
+                return visitNodes(cbNodes, node.declarations);
+            case 202 /* ExpressionStatement */:
+                return visitNode(cbNode, node.expression);
+            case 203 /* IfStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.thenStatement) ||
+                    visitNode(cbNode, node.elseStatement);
+            case 204 /* DoStatement */:
+                return visitNode(cbNode, node.statement) ||
+                    visitNode(cbNode, node.expression);
+            case 205 /* WhileStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 206 /* ForStatement */:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.condition) ||
+                    visitNode(cbNode, node.incrementor) ||
+                    visitNode(cbNode, node.statement);
+            case 207 /* ForInStatement */:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 208 /* ForOfStatement */:
+                return visitNode(cbNode, node.initializer) ||
+                    visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 209 /* ContinueStatement */:
+            case 210 /* BreakStatement */:
+                return visitNode(cbNode, node.label);
+            case 211 /* ReturnStatement */:
+                return visitNode(cbNode, node.expression);
+            case 212 /* WithStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.statement);
+            case 213 /* SwitchStatement */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNode(cbNode, node.caseBlock);
+            case 227 /* CaseBlock */:
+                return visitNodes(cbNodes, node.clauses);
+            case 249 /* CaseClause */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.statements);
+            case 250 /* DefaultClause */:
+                return visitNodes(cbNodes, node.statements);
+            case 214 /* LabeledStatement */:
+                return visitNode(cbNode, node.label) ||
+                    visitNode(cbNode, node.statement);
+            case 215 /* ThrowStatement */:
+                return visitNode(cbNode, node.expression);
+            case 216 /* TryStatement */:
+                return visitNode(cbNode, node.tryBlock) ||
+                    visitNode(cbNode, node.catchClause) ||
+                    visitNode(cbNode, node.finallyBlock);
+            case 252 /* CatchClause */:
+                return visitNode(cbNode, node.variableDeclaration) ||
+                    visitNode(cbNode, node.block);
+            case 143 /* Decorator */:
+                return visitNode(cbNode, node.expression);
+            case 221 /* ClassDeclaration */:
+            case 192 /* ClassExpression */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 222 /* InterfaceDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNodes(cbNodes, node.heritageClauses) ||
+                    visitNodes(cbNodes, node.members);
+            case 223 /* TypeAliasDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeParameters) ||
+                    visitNode(cbNode, node.type);
+            case 224 /* EnumDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.members);
+            case 255 /* EnumMember */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 225 /* ModuleDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.body);
+            case 229 /* ImportEqualsDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.moduleReference);
+            case 230 /* ImportDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.importClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 231 /* ImportClause */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.namedBindings);
+            case 228 /* NamespaceExportDeclaration */:
+                return visitNode(cbNode, node.name);
+            case 232 /* NamespaceImport */:
+                return visitNode(cbNode, node.name);
+            case 233 /* NamedImports */:
+            case 237 /* NamedExports */:
+                return visitNodes(cbNodes, node.elements);
+            case 236 /* ExportDeclaration */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.exportClause) ||
+                    visitNode(cbNode, node.moduleSpecifier);
+            case 234 /* ImportSpecifier */:
+            case 238 /* ExportSpecifier */:
+                return visitNode(cbNode, node.propertyName) ||
+                    visitNode(cbNode, node.name);
+            case 235 /* ExportAssignment */:
+                return visitNodes(cbNodes, node.decorators) ||
+                    visitNodes(cbNodes, node.modifiers) ||
+                    visitNode(cbNode, node.expression);
+            case 189 /* TemplateExpression */:
+                return visitNode(cbNode, node.head) || visitNodes(cbNodes, node.templateSpans);
+            case 197 /* TemplateSpan */:
+                return visitNode(cbNode, node.expression) || visitNode(cbNode, node.literal);
+            case 140 /* ComputedPropertyName */:
+                return visitNode(cbNode, node.expression);
+            case 251 /* HeritageClause */:
+                return visitNodes(cbNodes, node.types);
+            case 194 /* ExpressionWithTypeArguments */:
+                return visitNode(cbNode, node.expression) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 240 /* ExternalModuleReference */:
+                return visitNode(cbNode, node.expression);
+            case 239 /* MissingDeclaration */:
+                return visitNodes(cbNodes, node.decorators);
+            case 241 /* JsxElement */:
+                return visitNode(cbNode, node.openingElement) ||
+                    visitNodes(cbNodes, node.children) ||
+                    visitNode(cbNode, node.closingElement);
+            case 242 /* JsxSelfClosingElement */:
+            case 243 /* JsxOpeningElement */:
+                return visitNode(cbNode, node.tagName) ||
+                    visitNodes(cbNodes, node.attributes);
+            case 246 /* JsxAttribute */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.initializer);
+            case 247 /* JsxSpreadAttribute */:
+                return visitNode(cbNode, node.expression);
+            case 248 /* JsxExpression */:
+                return visitNode(cbNode, node.expression);
+            case 245 /* JsxClosingElement */:
+                return visitNode(cbNode, node.tagName);
+            case 257 /* JSDocTypeExpression */:
+                return visitNode(cbNode, node.type);
+            case 261 /* JSDocUnionType */:
+                return visitNodes(cbNodes, node.types);
+            case 262 /* JSDocTupleType */:
+                return visitNodes(cbNodes, node.types);
+            case 260 /* JSDocArrayType */:
+                return visitNode(cbNode, node.elementType);
+            case 264 /* JSDocNonNullableType */:
+                return visitNode(cbNode, node.type);
+            case 263 /* JSDocNullableType */:
+                return visitNode(cbNode, node.type);
+            case 265 /* JSDocRecordType */:
+                return visitNodes(cbNodes, node.members);
+            case 267 /* JSDocTypeReference */:
+                return visitNode(cbNode, node.name) ||
+                    visitNodes(cbNodes, node.typeArguments);
+            case 268 /* JSDocOptionalType */:
+                return visitNode(cbNode, node.type);
+            case 269 /* JSDocFunctionType */:
+                return visitNodes(cbNodes, node.parameters) ||
+                    visitNode(cbNode, node.type);
+            case 270 /* JSDocVariadicType */:
+                return visitNode(cbNode, node.type);
+            case 271 /* JSDocConstructorType */:
+                return visitNode(cbNode, node.type);
+            case 272 /* JSDocThisType */:
+                return visitNode(cbNode, node.type);
+            case 266 /* JSDocRecordMember */:
+                return visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.type);
+            case 273 /* JSDocComment */:
+                return visitNodes(cbNodes, node.tags);
+            case 275 /* JSDocParameterTag */:
+                return visitNode(cbNode, node.preParameterName) ||
+                    visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.postParameterName);
+            case 276 /* JSDocReturnTag */:
+                return visitNode(cbNode, node.typeExpression);
+            case 277 /* JSDocTypeTag */:
+                return visitNode(cbNode, node.typeExpression);
+            case 278 /* JSDocTemplateTag */:
+                return visitNodes(cbNodes, node.typeParameters);
+            case 279 /* JSDocTypedefTag */:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.name) ||
+                    visitNode(cbNode, node.jsDocTypeLiteral);
+            case 281 /* JSDocTypeLiteral */:
+                return visitNodes(cbNodes, node.jsDocPropertyTags);
+            case 280 /* JSDocPropertyTag */:
+                return visitNode(cbNode, node.typeExpression) ||
+                    visitNode(cbNode, node.name);
+        }
+    }
+    ts.forEachChild = forEachChild;
+    function createSourceFile(fileName, sourceText, languageVersion, setParentNodes, scriptKind) {
+        if (setParentNodes === void 0) { setParentNodes = false; }
+        var start = new Date().getTime();
+        var result = Parser.parseSourceFile(fileName, sourceText, languageVersion, /*syntaxCursor*/ undefined, setParentNodes, scriptKind);
+        ts.parseTime += new Date().getTime() - start;
+        return result;
+    }
+    ts.createSourceFile = createSourceFile;
+    function isExternalModule(file) {
+        return file.externalModuleIndicator !== undefined;
+    }
+    ts.isExternalModule = isExternalModule;
+    // Produces a new SourceFile for the 'newText' provided. The 'textChangeRange' parameter
+    // indicates what changed between the 'text' that this SourceFile has and the 'newText'.
+    // The SourceFile will be created with the compiler attempting to reuse as many nodes from
+    // this file as possible.
+    //
+    // Note: this function mutates nodes from this SourceFile. That means any existing nodes
+    // from this SourceFile that are being held onto may change as a result (including
+    // becoming detached from any SourceFile).  It is recommended that this SourceFile not
+    // be used once 'update' is called on it.
+    function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+        return IncrementalParser.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
+    }
+    ts.updateSourceFile = updateSourceFile;
+    /* @internal */
+    function parseIsolatedJSDocComment(content, start, length) {
+        var result = Parser.JSDocParser.parseIsolatedJSDocComment(content, start, length);
+        if (result && result.jsDocComment) {
+            // because the jsDocComment was parsed out of the source file, it might
+            // not be covered by the fixupParentReferences.
+            Parser.fixupParentReferences(result.jsDocComment);
+        }
+        return result;
+    }
+    ts.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+    /* @internal */
+    // Exposed only for testing.
+    function parseJSDocTypeExpressionForTests(content, start, length) {
+        return Parser.JSDocParser.parseJSDocTypeExpressionForTests(content, start, length);
+    }
+    ts.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+    // Implement the parser as a singleton module.  We do this for perf reasons because creating
+    // parser instances can actually be expensive enough to impact us on projects with many source
+    // files.
+    var Parser;
+    (function (Parser) {
+        // Share a single scanner across all calls to parse a source file.  This helps speed things
+        // up by avoiding the cost of creating/compiling scanners over and over again.
+        var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ true);
+        var disallowInAndDecoratorContext = 4194304 /* DisallowInContext */ | 16777216 /* DecoratorContext */;
+        // capture constructors in 'initializeState' to avoid null checks
+        var NodeConstructor;
+        var SourceFileConstructor;
+        var sourceFile;
+        var parseDiagnostics;
+        var syntaxCursor;
+        var token;
+        var sourceText;
+        var nodeCount;
+        var identifiers;
+        var identifierCount;
+        var parsingContext;
+        // Flags that dictate what parsing context we're in.  For example:
+        // Whether or not we are in strict parsing mode.  All that changes in strict parsing mode is
+        // that some tokens that would be considered identifiers may be considered keywords.
+        //
+        // When adding more parser context flags, consider which is the more common case that the
+        // flag will be in.  This should be the 'false' state for that flag.  The reason for this is
+        // that we don't store data in our nodes unless the value is in the *non-default* state.  So,
+        // for example, more often than code 'allows-in' (or doesn't 'disallow-in').  We opt for
+        // 'disallow-in' set to 'false'.  Otherwise, if we had 'allowsIn' set to 'true', then almost
+        // all nodes would need extra state on them to store this info.
+        //
+        // Note:  'allowIn' and 'allowYield' track 1:1 with the [in] and [yield] concepts in the ES6
+        // grammar specification.
+        //
+        // An important thing about these context concepts.  By default they are effectively inherited
+        // while parsing through every grammar production.  i.e. if you don't change them, then when
+        // you parse a sub-production, it will have the same context values as the parent production.
+        // This is great most of the time.  After all, consider all the 'expression' grammar productions
+        // and how nearly all of them pass along the 'in' and 'yield' context values:
+        //
+        // EqualityExpression[In, Yield] :
+        //      RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] == RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] != RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] === RelationalExpression[?In, ?Yield]
+        //      EqualityExpression[?In, ?Yield] !== RelationalExpression[?In, ?Yield]
+        //
+        // Where you have to be careful is then understanding what the points are in the grammar
+        // where the values are *not* passed along.  For example:
+        //
+        // SingleNameBinding[Yield,GeneratorParameter]
+        //      [+GeneratorParameter]BindingIdentifier[Yield] Initializer[In]opt
+        //      [~GeneratorParameter]BindingIdentifier[?Yield]Initializer[In, ?Yield]opt
+        //
+        // Here this is saying that if the GeneratorParameter context flag is set, that we should
+        // explicitly set the 'yield' context flag to false before calling into the BindingIdentifier
+        // and we should explicitly unset the 'yield' context flag before calling into the Initializer.
+        // production.  Conversely, if the GeneratorParameter context flag is not set, then we
+        // should leave the 'yield' context flag alone.
+        //
+        // Getting this all correct is tricky and requires careful reading of the grammar to
+        // understand when these values should be changed versus when they should be inherited.
+        //
+        // Note: it should not be necessary to save/restore these flags during speculative/lookahead
+        // parsing.  These context flags are naturally stored and restored through normal recursive
+        // descent parsing and unwinding.
+        var contextFlags;
+        // Whether or not we've had a parse error since creating the last AST node.  If we have
+        // encountered an error, it will be stored on the next AST node we create.  Parse errors
+        // can be broken down into three categories:
+        //
+        // 1) An error that occurred during scanning.  For example, an unterminated literal, or a
+        //    character that was completely not understood.
+        //
+        // 2) A token was expected, but was not present.  This type of error is commonly produced
+        //    by the 'parseExpected' function.
+        //
+        // 3) A token was present that no parsing function was able to consume.  This type of error
+        //    only occurs in the 'abortParsingListOrMoveToNextToken' function when the parser
+        //    decides to skip the token.
+        //
+        // In all of these cases, we want to mark the next node as having had an error before it.
+        // With this mark, we can know in incremental settings if this node can be reused, or if
+        // we have to reparse it.  If we don't keep this information around, we may just reuse the
+        // node.  in that event we would then not produce the same errors as we did before, causing
+        // significant confusion problems.
+        //
+        // Note: it is necessary that this value be saved/restored during speculative/lookahead
+        // parsing.  During lookahead parsing, we will often create a node.  That node will have
+        // this value attached, and then this value will be set back to 'false'.  If we decide to
+        // rewind, we must get back to the same value we had prior to the lookahead.
+        //
+        // Note: any errors at the end of the file that do not precede a regular node, should get
+        // attached to the EOF token.
+        var parseErrorBeforeNextFinishedNode = false;
+        function parseSourceFile(fileName, _sourceText, languageVersion, _syntaxCursor, setParentNodes, scriptKind) {
+            scriptKind = ts.ensureScriptKind(fileName, scriptKind);
+            initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind);
+            var result = parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind);
+            clearState();
+            return result;
+        }
+        Parser.parseSourceFile = parseSourceFile;
+        function getLanguageVariant(scriptKind) {
+            // .tsx and .jsx files are treated as jsx language variant.
+            return scriptKind === 4 /* TSX */ || scriptKind === 2 /* JSX */ || scriptKind === 1 /* JS */ ? 1 /* JSX */ : 0 /* Standard */;
+        }
+        function initializeState(fileName, _sourceText, languageVersion, _syntaxCursor, scriptKind) {
+            NodeConstructor = ts.objectAllocator.getNodeConstructor();
+            SourceFileConstructor = ts.objectAllocator.getSourceFileConstructor();
+            sourceText = _sourceText;
+            syntaxCursor = _syntaxCursor;
+            parseDiagnostics = [];
+            parsingContext = 0;
+            identifiers = {};
+            identifierCount = 0;
+            nodeCount = 0;
+            contextFlags = scriptKind === 1 /* JS */ || scriptKind === 2 /* JSX */ ? 134217728 /* JavaScriptFile */ : 0 /* None */;
+            parseErrorBeforeNextFinishedNode = false;
+            // Initialize and prime the scanner before parsing the source elements.
+            scanner.setText(sourceText);
+            scanner.setOnError(scanError);
+            scanner.setScriptTarget(languageVersion);
+            scanner.setLanguageVariant(getLanguageVariant(scriptKind));
+        }
+        function clearState() {
+            // Clear out the text the scanner is pointing at, so it doesn't keep anything alive unnecessarily.
+            scanner.setText("");
+            scanner.setOnError(undefined);
+            // Clear any data.  We don't want to accidentally hold onto it for too long.
+            parseDiagnostics = undefined;
+            sourceFile = undefined;
+            identifiers = undefined;
+            syntaxCursor = undefined;
+            sourceText = undefined;
+        }
+        function parseSourceFileWorker(fileName, languageVersion, setParentNodes, scriptKind) {
+            sourceFile = createSourceFile(fileName, languageVersion, scriptKind);
+            sourceFile.flags = contextFlags;
+            // Prime the scanner.
+            token = nextToken();
+            processReferenceComments(sourceFile);
+            sourceFile.statements = parseList(0 /* SourceElements */, parseStatement);
+            ts.Debug.assert(token === 1 /* EndOfFileToken */);
+            sourceFile.endOfFileToken = parseTokenNode();
+            setExternalModuleIndicator(sourceFile);
+            sourceFile.nodeCount = nodeCount;
+            sourceFile.identifierCount = identifierCount;
+            sourceFile.identifiers = identifiers;
+            sourceFile.parseDiagnostics = parseDiagnostics;
+            if (setParentNodes) {
+                fixupParentReferences(sourceFile);
+            }
+            return sourceFile;
+        }
+        function addJSDocComment(node) {
+            if (contextFlags & 134217728 /* JavaScriptFile */) {
+                var comments = ts.getLeadingCommentRangesOfNode(node, sourceFile);
+                if (comments) {
+                    for (var _i = 0, comments_1 = comments; _i < comments_1.length; _i++) {
+                        var comment = comments_1[_i];
+                        var jsDocComment = JSDocParser.parseJSDocComment(node, comment.pos, comment.end - comment.pos);
+                        if (!jsDocComment) {
+                            continue;
+                        }
+                        if (!node.jsDocComments) {
+                            node.jsDocComments = [];
+                        }
+                        node.jsDocComments.push(jsDocComment);
+                    }
+                }
+            }
+            return node;
+        }
+        function fixupParentReferences(rootNode) {
+            // normally parent references are set during binding. However, for clients that only need
+            // a syntax tree, and no semantic features, then the binding process is an unnecessary
+            // overhead.  This functions allows us to set all the parents, without all the expense of
+            // binding.
+            var parent = rootNode;
+            forEachChild(rootNode, visitNode);
+            return;
+            function visitNode(n) {
+                // walk down setting parents that differ from the parent we think it should be.  This
+                // allows us to quickly bail out of setting parents for subtrees during incremental
+                // parsing
+                if (n.parent !== parent) {
+                    n.parent = parent;
+                    var saveParent = parent;
+                    parent = n;
+                    forEachChild(n, visitNode);
+                    if (n.jsDocComments) {
+                        for (var _i = 0, _a = n.jsDocComments; _i < _a.length; _i++) {
+                            var jsDocComment = _a[_i];
+                            jsDocComment.parent = n;
+                            parent = jsDocComment;
+                            forEachChild(jsDocComment, visitNode);
+                        }
+                    }
+                    parent = saveParent;
+                }
+            }
+        }
+        Parser.fixupParentReferences = fixupParentReferences;
+        function createSourceFile(fileName, languageVersion, scriptKind) {
+            // code from createNode is inlined here so createNode won't have to deal with special case of creating source files
+            // this is quite rare comparing to other nodes and createNode should be as fast as possible
+            var sourceFile = new SourceFileConstructor(256 /* SourceFile */, /*pos*/ 0, /* end */ sourceText.length);
+            nodeCount++;
+            sourceFile.text = sourceText;
+            sourceFile.bindDiagnostics = [];
+            sourceFile.languageVersion = languageVersion;
+            sourceFile.fileName = ts.normalizePath(fileName);
+            sourceFile.languageVariant = getLanguageVariant(scriptKind);
+            sourceFile.isDeclarationFile = ts.fileExtensionIs(sourceFile.fileName, ".d.ts");
+            sourceFile.scriptKind = scriptKind;
+            return sourceFile;
+        }
+        function setContextFlag(val, flag) {
+            if (val) {
+                contextFlags |= flag;
+            }
+            else {
+                contextFlags &= ~flag;
+            }
+        }
+        function setDisallowInContext(val) {
+            setContextFlag(val, 4194304 /* DisallowInContext */);
+        }
+        function setYieldContext(val) {
+            setContextFlag(val, 8388608 /* YieldContext */);
+        }
+        function setDecoratorContext(val) {
+            setContextFlag(val, 16777216 /* DecoratorContext */);
+        }
+        function setAwaitContext(val) {
+            setContextFlag(val, 33554432 /* AwaitContext */);
+        }
+        function doOutsideOfContext(context, func) {
+            // contextFlagsToClear will contain only the context flags that are
+            // currently set that we need to temporarily clear
+            // We don't just blindly reset to the previous flags to ensure
+            // that we do not mutate cached flags for the incremental
+            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
+            // HasAggregatedChildData).
+            var contextFlagsToClear = context & contextFlags;
+            if (contextFlagsToClear) {
+                // clear the requested context flags
+                setContextFlag(/*val*/ false, contextFlagsToClear);
+                var result = func();
+                // restore the context flags we just cleared
+                setContextFlag(/*val*/ true, contextFlagsToClear);
+                return result;
+            }
+            // no need to do anything special as we are not in any of the requested contexts
+            return func();
+        }
+        function doInsideOfContext(context, func) {
+            // contextFlagsToSet will contain only the context flags that
+            // are not currently set that we need to temporarily enable.
+            // We don't just blindly reset to the previous flags to ensure
+            // that we do not mutate cached flags for the incremental
+            // parser (ThisNodeHasError, ThisNodeOrAnySubNodesHasError, and
+            // HasAggregatedChildData).
+            var contextFlagsToSet = context & ~contextFlags;
+            if (contextFlagsToSet) {
+                // set the requested context flags
+                setContextFlag(/*val*/ true, contextFlagsToSet);
+                var result = func();
+                // reset the context flags we just set
+                setContextFlag(/*val*/ false, contextFlagsToSet);
+                return result;
+            }
+            // no need to do anything special as we are already in all of the requested contexts
+            return func();
+        }
+        function allowInAnd(func) {
+            return doOutsideOfContext(4194304 /* DisallowInContext */, func);
+        }
+        function disallowInAnd(func) {
+            return doInsideOfContext(4194304 /* DisallowInContext */, func);
+        }
+        function doInYieldContext(func) {
+            return doInsideOfContext(8388608 /* YieldContext */, func);
+        }
+        function doInDecoratorContext(func) {
+            return doInsideOfContext(16777216 /* DecoratorContext */, func);
+        }
+        function doInAwaitContext(func) {
+            return doInsideOfContext(33554432 /* AwaitContext */, func);
+        }
+        function doOutsideOfAwaitContext(func) {
+            return doOutsideOfContext(33554432 /* AwaitContext */, func);
+        }
+        function doInYieldAndAwaitContext(func) {
+            return doInsideOfContext(8388608 /* YieldContext */ | 33554432 /* AwaitContext */, func);
+        }
+        function inContext(flags) {
+            return (contextFlags & flags) !== 0;
+        }
+        function inYieldContext() {
+            return inContext(8388608 /* YieldContext */);
+        }
+        function inDisallowInContext() {
+            return inContext(4194304 /* DisallowInContext */);
+        }
+        function inDecoratorContext() {
+            return inContext(16777216 /* DecoratorContext */);
+        }
+        function inAwaitContext() {
+            return inContext(33554432 /* AwaitContext */);
+        }
+        function parseErrorAtCurrentToken(message, arg0) {
+            var start = scanner.getTokenPos();
+            var length = scanner.getTextPos() - start;
+            parseErrorAtPosition(start, length, message, arg0);
+        }
+        function parseErrorAtPosition(start, length, message, arg0) {
+            // Don't report another error if it would just be at the same position as the last error.
+            var lastError = ts.lastOrUndefined(parseDiagnostics);
+            if (!lastError || start !== lastError.start) {
+                parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, start, length, message, arg0));
+            }
+            // Mark that we've encountered an error.  We'll set an appropriate bit on the next
+            // node we finish so that it can't be reused incrementally.
+            parseErrorBeforeNextFinishedNode = true;
+        }
+        function scanError(message, length) {
+            var pos = scanner.getTextPos();
+            parseErrorAtPosition(pos, length || 0, message);
+        }
+        function getNodePos() {
+            return scanner.getStartPos();
+        }
+        function getNodeEnd() {
+            return scanner.getStartPos();
+        }
+        function nextToken() {
+            return token = scanner.scan();
+        }
+        function reScanGreaterToken() {
+            return token = scanner.reScanGreaterToken();
+        }
+        function reScanSlashToken() {
+            return token = scanner.reScanSlashToken();
+        }
+        function reScanTemplateToken() {
+            return token = scanner.reScanTemplateToken();
+        }
+        function scanJsxIdentifier() {
+            return token = scanner.scanJsxIdentifier();
+        }
+        function scanJsxText() {
+            return token = scanner.scanJsxToken();
+        }
+        function speculationHelper(callback, isLookAhead) {
+            // Keep track of the state we'll need to rollback to if lookahead fails (or if the
+            // caller asked us to always reset our state).
+            var saveToken = token;
+            var saveParseDiagnosticsLength = parseDiagnostics.length;
+            var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+            // Note: it is not actually necessary to save/restore the context flags here.  That's
+            // because the saving/restoring of these flags happens naturally through the recursive
+            // descent nature of our parser.  However, we still store this here just so we can
+            // assert that that invariant holds.
+            var saveContextFlags = contextFlags;
+            // If we're only looking ahead, then tell the scanner to only lookahead as well.
+            // Otherwise, if we're actually speculatively parsing, then tell the scanner to do the
+            // same.
+            var result = isLookAhead
+                ? scanner.lookAhead(callback)
+                : scanner.tryScan(callback);
+            ts.Debug.assert(saveContextFlags === contextFlags);
+            // If our callback returned something 'falsy' or we're just looking ahead,
+            // then unconditionally restore us to where we were.
+            if (!result || isLookAhead) {
+                token = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+            }
+            return result;
+        }
+        /** Invokes the provided callback then unconditionally restores the parser to the state it
+         * was in immediately prior to invoking the callback.  The result of invoking the callback
+         * is returned from this function.
+         */
+        function lookAhead(callback) {
+            return speculationHelper(callback, /*isLookAhead*/ true);
+        }
+        /** Invokes the provided callback.  If the callback returns something falsy, then it restores
+         * the parser to the state it was in immediately prior to invoking the callback.  If the
+         * callback returns something truthy, then the parser state is not rolled back.  The result
+         * of invoking the callback is returned from this function.
+         */
+        function tryParse(callback) {
+            return speculationHelper(callback, /*isLookAhead*/ false);
+        }
+        // Ignore strict mode flag because we will report an error in type checker instead.
+        function isIdentifier() {
+            if (token === 69 /* Identifier */) {
+                return true;
+            }
+            // If we have a 'yield' keyword, and we're in the [yield] context, then 'yield' is
+            // considered a keyword and is not an identifier.
+            if (token === 114 /* YieldKeyword */ && inYieldContext()) {
+                return false;
+            }
+            // If we have a 'await' keyword, and we're in the [Await] context, then 'await' is
+            // considered a keyword and is not an identifier.
+            if (token === 119 /* AwaitKeyword */ && inAwaitContext()) {
+                return false;
+            }
+            return token > 105 /* LastReservedWord */;
+        }
+        function parseExpected(kind, diagnosticMessage, shouldAdvance) {
+            if (shouldAdvance === void 0) { shouldAdvance = true; }
+            if (token === kind) {
+                if (shouldAdvance) {
+                    nextToken();
+                }
+                return true;
+            }
+            // Report specific message if provided with one.  Otherwise, report generic fallback message.
+            if (diagnosticMessage) {
+                parseErrorAtCurrentToken(diagnosticMessage);
+            }
+            else {
+                parseErrorAtCurrentToken(ts.Diagnostics._0_expected, ts.tokenToString(kind));
+            }
+            return false;
+        }
+        function parseOptional(t) {
+            if (token === t) {
+                nextToken();
+                return true;
+            }
+            return false;
+        }
+        function parseOptionalToken(t) {
+            if (token === t) {
+                return parseTokenNode();
+            }
+            return undefined;
+        }
+        function parseExpectedToken(t, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            return parseOptionalToken(t) ||
+                createMissingNode(t, reportAtCurrentPosition, diagnosticMessage, arg0);
+        }
+        function parseTokenNode() {
+            var node = createNode(token);
+            nextToken();
+            return finishNode(node);
+        }
+        function canParseSemicolon() {
+            // If there's a real semicolon, then we can always parse it out.
+            if (token === 23 /* SemicolonToken */) {
+                return true;
+            }
+            // We can parse out an optional semicolon in ASI cases in the following cases.
+            return token === 16 /* CloseBraceToken */ || token === 1 /* EndOfFileToken */ || scanner.hasPrecedingLineBreak();
+        }
+        function parseSemicolon() {
+            if (canParseSemicolon()) {
+                if (token === 23 /* SemicolonToken */) {
+                    // consume the semicolon if it was explicitly provided.
+                    nextToken();
+                }
+                return true;
+            }
+            else {
+                return parseExpected(23 /* SemicolonToken */);
+            }
+        }
+        // note: this function creates only node
+        function createNode(kind, pos) {
+            nodeCount++;
+            if (!(pos >= 0)) {
+                pos = scanner.getStartPos();
+            }
+            return new NodeConstructor(kind, pos, pos);
+        }
+        function finishNode(node, end) {
+            node.end = end === undefined ? scanner.getStartPos() : end;
+            if (contextFlags) {
+                node.flags |= contextFlags;
+            }
+            // Keep track on the node if we encountered an error while parsing it.  If we did, then
+            // we cannot reuse the node incrementally.  Once we've marked this node, clear out the
+            // flag so that we don't mark any subsequent nodes.
+            if (parseErrorBeforeNextFinishedNode) {
+                parseErrorBeforeNextFinishedNode = false;
+                node.flags |= 67108864 /* ThisNodeHasError */;
+            }
+            return node;
+        }
+        function createMissingNode(kind, reportAtCurrentPosition, diagnosticMessage, arg0) {
+            if (reportAtCurrentPosition) {
+                parseErrorAtPosition(scanner.getStartPos(), 0, diagnosticMessage, arg0);
+            }
+            else {
+                parseErrorAtCurrentToken(diagnosticMessage, arg0);
+            }
+            var result = createNode(kind, scanner.getStartPos());
+            result.text = "";
+            return finishNode(result);
+        }
+        function internIdentifier(text) {
+            text = ts.escapeIdentifier(text);
+            return ts.hasProperty(identifiers, text) ? identifiers[text] : (identifiers[text] = text);
+        }
+        // An identifier that starts with two underscores has an extra underscore character prepended to it to avoid issues
+        // with magic property names like '__proto__'. The 'identifiers' object is used to share a single string instance for
+        // each identifier in order to reduce memory consumption.
+        function createIdentifier(isIdentifier, diagnosticMessage) {
+            identifierCount++;
+            if (isIdentifier) {
+                var node = createNode(69 /* Identifier */);
+                // Store original token kind if it is not just an Identifier so we can report appropriate error later in type checker
+                if (token !== 69 /* Identifier */) {
+                    node.originalKeywordKind = token;
+                }
+                node.text = internIdentifier(scanner.getTokenValue());
+                nextToken();
+                return finishNode(node);
+            }
+            return createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ false, diagnosticMessage || ts.Diagnostics.Identifier_expected);
+        }
+        function parseIdentifier(diagnosticMessage) {
+            return createIdentifier(isIdentifier(), diagnosticMessage);
+        }
+        function parseIdentifierName() {
+            return createIdentifier(ts.tokenIsIdentifierOrKeyword(token));
+        }
+        function isLiteralPropertyName() {
+            return ts.tokenIsIdentifierOrKeyword(token) ||
+                token === 9 /* StringLiteral */ ||
+                token === 8 /* NumericLiteral */;
+        }
+        function parsePropertyNameWorker(allowComputedPropertyNames) {
+            if (token === 9 /* StringLiteral */ || token === 8 /* NumericLiteral */) {
+                return parseLiteralNode(/*internName*/ true);
+            }
+            if (allowComputedPropertyNames && token === 19 /* OpenBracketToken */) {
+                return parseComputedPropertyName();
+            }
+            return parseIdentifierName();
+        }
+        function parsePropertyName() {
+            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ true);
+        }
+        function parseSimplePropertyName() {
+            return parsePropertyNameWorker(/*allowComputedPropertyNames*/ false);
+        }
+        function isSimplePropertyName() {
+            return token === 9 /* StringLiteral */ || token === 8 /* NumericLiteral */ || ts.tokenIsIdentifierOrKeyword(token);
+        }
+        function parseComputedPropertyName() {
+            // PropertyName [Yield]:
+            //      LiteralPropertyName
+            //      ComputedPropertyName[?Yield]
+            var node = createNode(140 /* ComputedPropertyName */);
+            parseExpected(19 /* OpenBracketToken */);
+            // We parse any expression (including a comma expression). But the grammar
+            // says that only an assignment expression is allowed, so the grammar checker
+            // will error if it sees a comma expression.
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(20 /* CloseBracketToken */);
+            return finishNode(node);
+        }
+        function parseContextualModifier(t) {
+            return token === t && tryParse(nextTokenCanFollowModifier);
+        }
+        function nextTokenIsOnSameLineAndCanFollowModifier() {
+            nextToken();
+            if (scanner.hasPrecedingLineBreak()) {
+                return false;
+            }
+            return canFollowModifier();
+        }
+        function nextTokenCanFollowModifier() {
+            if (token === 74 /* ConstKeyword */) {
+                // 'const' is only a modifier if followed by 'enum'.
+                return nextToken() === 81 /* EnumKeyword */;
+            }
+            if (token === 82 /* ExportKeyword */) {
+                nextToken();
+                if (token === 77 /* DefaultKeyword */) {
+                    return lookAhead(nextTokenIsClassOrFunction);
+                }
+                return token !== 37 /* AsteriskToken */ && token !== 116 /* AsKeyword */ && token !== 15 /* OpenBraceToken */ && canFollowModifier();
+            }
+            if (token === 77 /* DefaultKeyword */) {
+                return nextTokenIsClassOrFunction();
+            }
+            if (token === 113 /* StaticKeyword */) {
+                nextToken();
+                return canFollowModifier();
+            }
+            return nextTokenIsOnSameLineAndCanFollowModifier();
+        }
+        function parseAnyContextualModifier() {
+            return ts.isModifierKind(token) && tryParse(nextTokenCanFollowModifier);
+        }
+        function canFollowModifier() {
+            return token === 19 /* OpenBracketToken */
+                || token === 15 /* OpenBraceToken */
+                || token === 37 /* AsteriskToken */
+                || isLiteralPropertyName();
+        }
+        function nextTokenIsClassOrFunction() {
+            nextToken();
+            return token === 73 /* ClassKeyword */ || token === 87 /* FunctionKeyword */;
+        }
+        // True if positioned at the start of a list element
+        function isListElement(parsingContext, inErrorRecovery) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return true;
+            }
+            switch (parsingContext) {
+                case 0 /* SourceElements */:
+                case 1 /* BlockStatements */:
+                case 3 /* SwitchClauseStatements */:
+                    // If we're in error recovery, then we don't want to treat ';' as an empty statement.
+                    // The problem is that ';' can show up in far too many contexts, and if we see one
+                    // and assume it's a statement, then we may bail out inappropriately from whatever
+                    // we're parsing.  For example, if we have a semicolon in the middle of a class, then
+                    // we really don't want to assume the class is over and we're on a statement in the
+                    // outer module.  We just want to consume and move on.
+                    return !(token === 23 /* SemicolonToken */ && inErrorRecovery) && isStartOfStatement();
+                case 2 /* SwitchClauses */:
+                    return token === 71 /* CaseKeyword */ || token === 77 /* DefaultKeyword */;
+                case 4 /* TypeMembers */:
+                    return lookAhead(isTypeMemberStart);
+                case 5 /* ClassMembers */:
+                    // We allow semicolons as class elements (as specified by ES6) as long as we're
+                    // not in error recovery.  If we're in error recovery, we don't want an errant
+                    // semicolon to be treated as a class member (since they're almost always used
+                    // for statements.
+                    return lookAhead(isClassMemberStart) || (token === 23 /* SemicolonToken */ && !inErrorRecovery);
+                case 6 /* EnumMembers */:
+                    // Include open bracket computed properties. This technically also lets in indexers,
+                    // which would be a candidate for improved error reporting.
+                    return token === 19 /* OpenBracketToken */ || isLiteralPropertyName();
+                case 12 /* ObjectLiteralMembers */:
+                    return token === 19 /* OpenBracketToken */ || token === 37 /* AsteriskToken */ || isLiteralPropertyName();
+                case 9 /* ObjectBindingElements */:
+                    return token === 19 /* OpenBracketToken */ || isLiteralPropertyName();
+                case 7 /* HeritageClauseElement */:
+                    // If we see { } then only consume it as an expression if it is followed by , or {
+                    // That way we won't consume the body of a class in its heritage clause.
+                    if (token === 15 /* OpenBraceToken */) {
+                        return lookAhead(isValidHeritageClauseObjectLiteral);
+                    }
+                    if (!inErrorRecovery) {
+                        return isStartOfLeftHandSideExpression() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    }
+                    else {
+                        // If we're in error recovery we tighten up what we're willing to match.
+                        // That way we don't treat something like "this" as a valid heritage clause
+                        // element during recovery.
+                        return isIdentifier() && !isHeritageClauseExtendsOrImplementsKeyword();
+                    }
+                case 8 /* VariableDeclarations */:
+                    return isIdentifierOrPattern();
+                case 10 /* ArrayBindingElements */:
+                    return token === 24 /* CommaToken */ || token === 22 /* DotDotDotToken */ || isIdentifierOrPattern();
+                case 17 /* TypeParameters */:
+                    return isIdentifier();
+                case 11 /* ArgumentExpressions */:
+                case 15 /* ArrayLiteralMembers */:
+                    return token === 24 /* CommaToken */ || token === 22 /* DotDotDotToken */ || isStartOfExpression();
+                case 16 /* Parameters */:
+                    return isStartOfParameter();
+                case 18 /* TypeArguments */:
+                case 19 /* TupleElementTypes */:
+                    return token === 24 /* CommaToken */ || isStartOfType();
+                case 20 /* HeritageClauses */:
+                    return isHeritageClause();
+                case 21 /* ImportOrExportSpecifiers */:
+                    return ts.tokenIsIdentifierOrKeyword(token);
+                case 13 /* JsxAttributes */:
+                    return ts.tokenIsIdentifierOrKeyword(token) || token === 15 /* OpenBraceToken */;
+                case 14 /* JsxChildren */:
+                    return true;
+                case 22 /* JSDocFunctionParameters */:
+                case 23 /* JSDocTypeArguments */:
+                case 25 /* JSDocTupleTypes */:
+                    return JSDocParser.isJSDocType();
+                case 24 /* JSDocRecordMembers */:
+                    return isSimplePropertyName();
+            }
+            ts.Debug.fail("Non-exhaustive case in 'isListElement'.");
+        }
+        function isValidHeritageClauseObjectLiteral() {
+            ts.Debug.assert(token === 15 /* OpenBraceToken */);
+            if (nextToken() === 16 /* CloseBraceToken */) {
+                // if we see  "extends {}" then only treat the {} as what we're extending (and not
+                // the class body) if we have:
+                //
+                //      extends {} {
+                //      extends {},
+                //      extends {} extends
+                //      extends {} implements
+                var next = nextToken();
+                return next === 24 /* CommaToken */ || next === 15 /* OpenBraceToken */ || next === 83 /* ExtendsKeyword */ || next === 106 /* ImplementsKeyword */;
+            }
+            return true;
+        }
+        function nextTokenIsIdentifier() {
+            nextToken();
+            return isIdentifier();
+        }
+        function nextTokenIsIdentifierOrKeyword() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token);
+        }
+        function isHeritageClauseExtendsOrImplementsKeyword() {
+            if (token === 106 /* ImplementsKeyword */ ||
+                token === 83 /* ExtendsKeyword */) {
+                return lookAhead(nextTokenIsStartOfExpression);
+            }
+            return false;
+        }
+        function nextTokenIsStartOfExpression() {
+            nextToken();
+            return isStartOfExpression();
+        }
+        // True if positioned at a list terminator
+        function isListTerminator(kind) {
+            if (token === 1 /* EndOfFileToken */) {
+                // Being at the end of the file ends all lists.
+                return true;
+            }
+            switch (kind) {
+                case 1 /* BlockStatements */:
+                case 2 /* SwitchClauses */:
+                case 4 /* TypeMembers */:
+                case 5 /* ClassMembers */:
+                case 6 /* EnumMembers */:
+                case 12 /* ObjectLiteralMembers */:
+                case 9 /* ObjectBindingElements */:
+                case 21 /* ImportOrExportSpecifiers */:
+                    return token === 16 /* CloseBraceToken */;
+                case 3 /* SwitchClauseStatements */:
+                    return token === 16 /* CloseBraceToken */ || token === 71 /* CaseKeyword */ || token === 77 /* DefaultKeyword */;
+                case 7 /* HeritageClauseElement */:
+                    return token === 15 /* OpenBraceToken */ || token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */;
+                case 8 /* VariableDeclarations */:
+                    return isVariableDeclaratorListTerminator();
+                case 17 /* TypeParameters */:
+                    // Tokens other than '>' are here for better error recovery
+                    return token === 27 /* GreaterThanToken */ || token === 17 /* OpenParenToken */ || token === 15 /* OpenBraceToken */ || token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */;
+                case 11 /* ArgumentExpressions */:
+                    // Tokens other than ')' are here for better error recovery
+                    return token === 18 /* CloseParenToken */ || token === 23 /* SemicolonToken */;
+                case 15 /* ArrayLiteralMembers */:
+                case 19 /* TupleElementTypes */:
+                case 10 /* ArrayBindingElements */:
+                    return token === 20 /* CloseBracketToken */;
+                case 16 /* Parameters */:
+                    // Tokens other than ')' and ']' (the latter for index signatures) are here for better error recovery
+                    return token === 18 /* CloseParenToken */ || token === 20 /* CloseBracketToken */ /*|| token === SyntaxKind.OpenBraceToken*/;
+                case 18 /* TypeArguments */:
+                    // Tokens other than '>' are here for better error recovery
+                    return token === 27 /* GreaterThanToken */ || token === 17 /* OpenParenToken */;
+                case 20 /* HeritageClauses */:
+                    return token === 15 /* OpenBraceToken */ || token === 16 /* CloseBraceToken */;
+                case 13 /* JsxAttributes */:
+                    return token === 27 /* GreaterThanToken */ || token === 39 /* SlashToken */;
+                case 14 /* JsxChildren */:
+                    return token === 25 /* LessThanToken */ && lookAhead(nextTokenIsSlash);
+                case 22 /* JSDocFunctionParameters */:
+                    return token === 18 /* CloseParenToken */ || token === 54 /* ColonToken */ || token === 16 /* CloseBraceToken */;
+                case 23 /* JSDocTypeArguments */:
+                    return token === 27 /* GreaterThanToken */ || token === 16 /* CloseBraceToken */;
+                case 25 /* JSDocTupleTypes */:
+                    return token === 20 /* CloseBracketToken */ || token === 16 /* CloseBraceToken */;
+                case 24 /* JSDocRecordMembers */:
+                    return token === 16 /* CloseBraceToken */;
+            }
+        }
+        function isVariableDeclaratorListTerminator() {
+            // If we can consume a semicolon (either explicitly, or with ASI), then consider us done
+            // with parsing the list of  variable declarators.
+            if (canParseSemicolon()) {
+                return true;
+            }
+            // in the case where we're parsing the variable declarator of a 'for-in' statement, we
+            // are done if we see an 'in' keyword in front of us. Same with for-of
+            if (isInOrOfKeyword(token)) {
+                return true;
+            }
+            // ERROR RECOVERY TWEAK:
+            // For better error recovery, if we see an '=>' then we just stop immediately.  We've got an
+            // arrow function here and it's going to be very unlikely that we'll resynchronize and get
+            // another variable declaration.
+            if (token === 34 /* EqualsGreaterThanToken */) {
+                return true;
+            }
+            // Keep trying to parse out variable declarators.
+            return false;
+        }
+        // True if positioned at element or terminator of the current list or any enclosing list
+        function isInSomeParsingContext() {
+            for (var kind = 0; kind < 26 /* Count */; kind++) {
+                if (parsingContext & (1 << kind)) {
+                    if (isListElement(kind, /*inErrorRecovery*/ true) || isListTerminator(kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        // Parses a list of elements
+        function parseList(kind, parseElement) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = [];
+            result.pos = getNodePos();
+            while (!isListTerminator(kind)) {
+                if (isListElement(kind, /*inErrorRecovery*/ false)) {
+                    var element = parseListElement(kind, parseElement);
+                    result.push(element);
+                    continue;
+                }
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
+                }
+            }
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function parseListElement(parsingContext, parseElement) {
+            var node = currentNode(parsingContext);
+            if (node) {
+                return consumeNode(node);
+            }
+            return parseElement();
+        }
+        function currentNode(parsingContext) {
+            // If there is an outstanding parse error that we've encountered, but not attached to
+            // some node, then we cannot get a node from the old source tree.  This is because we
+            // want to mark the next node we encounter as being unusable.
+            //
+            // Note: This may be too conservative.  Perhaps we could reuse the node and set the bit
+            // on it (or its leftmost child) as having the error.  For now though, being conservative
+            // is nice and likely won't ever affect perf.
+            if (parseErrorBeforeNextFinishedNode) {
+                return undefined;
+            }
+            if (!syntaxCursor) {
+                // if we don't have a cursor, we could never return a node from the old tree.
+                return undefined;
+            }
+            var node = syntaxCursor.currentNode(scanner.getStartPos());
+            // Can't reuse a missing node.
+            if (ts.nodeIsMissing(node)) {
+                return undefined;
+            }
+            // Can't reuse a node that intersected the change range.
+            if (node.intersectsChange) {
+                return undefined;
+            }
+            // Can't reuse a node that contains a parse error.  This is necessary so that we
+            // produce the same set of errors again.
+            if (ts.containsParseError(node)) {
+                return undefined;
+            }
+            // We can only reuse a node if it was parsed under the same strict mode that we're
+            // currently in.  i.e. if we originally parsed a node in non-strict mode, but then
+            // the user added 'using strict' at the top of the file, then we can't use that node
+            // again as the presence of strict mode may cause us to parse the tokens in the file
+            // differently.
+            //
+            // Note: we *can* reuse tokens when the strict mode changes.  That's because tokens
+            // are unaffected by strict mode.  It's just the parser will decide what to do with it
+            // differently depending on what mode it is in.
+            //
+            // This also applies to all our other context flags as well.
+            var nodeContextFlags = node.flags & 197132288 /* ContextFlags */;
+            if (nodeContextFlags !== contextFlags) {
+                return undefined;
+            }
+            // Ok, we have a node that looks like it could be reused.  Now verify that it is valid
+            // in the current list parsing context that we're currently at.
+            if (!canReuseNode(node, parsingContext)) {
+                return undefined;
+            }
+            return node;
+        }
+        function consumeNode(node) {
+            // Move the scanner so it is after the node we just consumed.
+            scanner.setTextPos(node.end);
+            nextToken();
+            return node;
+        }
+        function canReuseNode(node, parsingContext) {
+            switch (parsingContext) {
+                case 5 /* ClassMembers */:
+                    return isReusableClassMember(node);
+                case 2 /* SwitchClauses */:
+                    return isReusableSwitchClause(node);
+                case 0 /* SourceElements */:
+                case 1 /* BlockStatements */:
+                case 3 /* SwitchClauseStatements */:
+                    return isReusableStatement(node);
+                case 6 /* EnumMembers */:
+                    return isReusableEnumMember(node);
+                case 4 /* TypeMembers */:
+                    return isReusableTypeMember(node);
+                case 8 /* VariableDeclarations */:
+                    return isReusableVariableDeclaration(node);
+                case 16 /* Parameters */:
+                    return isReusableParameter(node);
+                // Any other lists we do not care about reusing nodes in.  But feel free to add if
+                // you can do so safely.  Danger areas involve nodes that may involve speculative
+                // parsing.  If speculative parsing is involved with the node, then the range the
+                // parser reached while looking ahead might be in the edited range (see the example
+                // in canReuseVariableDeclaratorNode for a good case of this).
+                case 20 /* HeritageClauses */:
+                // This would probably be safe to reuse.  There is no speculative parsing with
+                // heritage clauses.
+                case 17 /* TypeParameters */:
+                // This would probably be safe to reuse.  There is no speculative parsing with
+                // type parameters.  Note that that's because type *parameters* only occur in
+                // unambiguous *type* contexts.  While type *arguments* occur in very ambiguous
+                // *expression* contexts.
+                case 19 /* TupleElementTypes */:
+                // This would probably be safe to reuse.  There is no speculative parsing with
+                // tuple types.
+                // Technically, type argument list types are probably safe to reuse.  While
+                // speculative parsing is involved with them (since type argument lists are only
+                // produced from speculative parsing a < as a type argument list), we only have
+                // the types because speculative parsing succeeded.  Thus, the lookahead never
+                // went past the end of the list and rewound.
+                case 18 /* TypeArguments */:
+                // Note: these are almost certainly not safe to ever reuse.  Expressions commonly
+                // need a large amount of lookahead, and we should not reuse them as they may
+                // have actually intersected the edit.
+                case 11 /* ArgumentExpressions */:
+                // This is not safe to reuse for the same reason as the 'AssignmentExpression'
+                // cases.  i.e. a property assignment may end with an expression, and thus might
+                // have lookahead far beyond it's old node.
+                case 12 /* ObjectLiteralMembers */:
+                // This is probably not safe to reuse.  There can be speculative parsing with
+                // type names in a heritage clause.  There can be generic names in the type
+                // name list, and there can be left hand side expressions (which can have type
+                // arguments.)
+                case 7 /* HeritageClauseElement */:
+                // Perhaps safe to reuse, but it's unlikely we'd see more than a dozen attributes
+                // on any given element. Same for children.
+                case 13 /* JsxAttributes */:
+                case 14 /* JsxChildren */:
+            }
+            return false;
+        }
+        function isReusableClassMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 148 /* Constructor */:
+                    case 153 /* IndexSignature */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 145 /* PropertyDeclaration */:
+                    case 198 /* SemicolonClassElement */:
+                        return true;
+                    case 147 /* MethodDeclaration */:
+                        // Method declarations are not necessarily reusable.  An object-literal
+                        // may have a method calls "constructor(...)" and we must reparse that
+                        // into an actual .ConstructorDeclaration.
+                        var methodDeclaration = node;
+                        var nameIsConstructor = methodDeclaration.name.kind === 69 /* Identifier */ &&
+                            methodDeclaration.name.originalKeywordKind === 121 /* ConstructorKeyword */;
+                        return !nameIsConstructor;
+                }
+            }
+            return false;
+        }
+        function isReusableSwitchClause(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 249 /* CaseClause */:
+                    case 250 /* DefaultClause */:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableStatement(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 220 /* FunctionDeclaration */:
+                    case 200 /* VariableStatement */:
+                    case 199 /* Block */:
+                    case 203 /* IfStatement */:
+                    case 202 /* ExpressionStatement */:
+                    case 215 /* ThrowStatement */:
+                    case 211 /* ReturnStatement */:
+                    case 213 /* SwitchStatement */:
+                    case 210 /* BreakStatement */:
+                    case 209 /* ContinueStatement */:
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                    case 206 /* ForStatement */:
+                    case 205 /* WhileStatement */:
+                    case 212 /* WithStatement */:
+                    case 201 /* EmptyStatement */:
+                    case 216 /* TryStatement */:
+                    case 214 /* LabeledStatement */:
+                    case 204 /* DoStatement */:
+                    case 217 /* DebuggerStatement */:
+                    case 230 /* ImportDeclaration */:
+                    case 229 /* ImportEqualsDeclaration */:
+                    case 236 /* ExportDeclaration */:
+                    case 235 /* ExportAssignment */:
+                    case 225 /* ModuleDeclaration */:
+                    case 221 /* ClassDeclaration */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 223 /* TypeAliasDeclaration */:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableEnumMember(node) {
+            return node.kind === 255 /* EnumMember */;
+        }
+        function isReusableTypeMember(node) {
+            if (node) {
+                switch (node.kind) {
+                    case 152 /* ConstructSignature */:
+                    case 146 /* MethodSignature */:
+                    case 153 /* IndexSignature */:
+                    case 144 /* PropertySignature */:
+                    case 151 /* CallSignature */:
+                        return true;
+                }
+            }
+            return false;
+        }
+        function isReusableVariableDeclaration(node) {
+            if (node.kind !== 218 /* VariableDeclaration */) {
+                return false;
+            }
+            // Very subtle incremental parsing bug.  Consider the following code:
+            //
+            //      let v = new List < A, B
+            //
+            // This is actually legal code.  It's a list of variable declarators "v = new List<A"
+            // on one side and "B" on the other. If you then change that to:
+            //
+            //      let v = new List < A, B >()
+            //
+            // then we have a problem.  "v = new List<A" doesn't intersect the change range, so we
+            // start reparsing at "B" and we completely fail to handle this properly.
+            //
+            // In order to prevent this, we do not allow a variable declarator to be reused if it
+            // has an initializer.
+            var variableDeclarator = node;
+            return variableDeclarator.initializer === undefined;
+        }
+        function isReusableParameter(node) {
+            if (node.kind !== 142 /* Parameter */) {
+                return false;
+            }
+            // See the comment in isReusableVariableDeclaration for why we do this.
+            var parameter = node;
+            return parameter.initializer === undefined;
+        }
+        // Returns true if we should abort parsing.
+        function abortParsingListOrMoveToNextToken(kind) {
+            parseErrorAtCurrentToken(parsingContextErrors(kind));
+            if (isInSomeParsingContext()) {
+                return true;
+            }
+            nextToken();
+            return false;
+        }
+        function parsingContextErrors(context) {
+            switch (context) {
+                case 0 /* SourceElements */: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 1 /* BlockStatements */: return ts.Diagnostics.Declaration_or_statement_expected;
+                case 2 /* SwitchClauses */: return ts.Diagnostics.case_or_default_expected;
+                case 3 /* SwitchClauseStatements */: return ts.Diagnostics.Statement_expected;
+                case 4 /* TypeMembers */: return ts.Diagnostics.Property_or_signature_expected;
+                case 5 /* ClassMembers */: return ts.Diagnostics.Unexpected_token_A_constructor_method_accessor_or_property_was_expected;
+                case 6 /* EnumMembers */: return ts.Diagnostics.Enum_member_expected;
+                case 7 /* HeritageClauseElement */: return ts.Diagnostics.Expression_expected;
+                case 8 /* VariableDeclarations */: return ts.Diagnostics.Variable_declaration_expected;
+                case 9 /* ObjectBindingElements */: return ts.Diagnostics.Property_destructuring_pattern_expected;
+                case 10 /* ArrayBindingElements */: return ts.Diagnostics.Array_element_destructuring_pattern_expected;
+                case 11 /* ArgumentExpressions */: return ts.Diagnostics.Argument_expression_expected;
+                case 12 /* ObjectLiteralMembers */: return ts.Diagnostics.Property_assignment_expected;
+                case 15 /* ArrayLiteralMembers */: return ts.Diagnostics.Expression_or_comma_expected;
+                case 16 /* Parameters */: return ts.Diagnostics.Parameter_declaration_expected;
+                case 17 /* TypeParameters */: return ts.Diagnostics.Type_parameter_declaration_expected;
+                case 18 /* TypeArguments */: return ts.Diagnostics.Type_argument_expected;
+                case 19 /* TupleElementTypes */: return ts.Diagnostics.Type_expected;
+                case 20 /* HeritageClauses */: return ts.Diagnostics.Unexpected_token_expected;
+                case 21 /* ImportOrExportSpecifiers */: return ts.Diagnostics.Identifier_expected;
+                case 13 /* JsxAttributes */: return ts.Diagnostics.Identifier_expected;
+                case 14 /* JsxChildren */: return ts.Diagnostics.Identifier_expected;
+                case 22 /* JSDocFunctionParameters */: return ts.Diagnostics.Parameter_declaration_expected;
+                case 23 /* JSDocTypeArguments */: return ts.Diagnostics.Type_argument_expected;
+                case 25 /* JSDocTupleTypes */: return ts.Diagnostics.Type_expected;
+                case 24 /* JSDocRecordMembers */: return ts.Diagnostics.Property_assignment_expected;
+            }
+        }
+        ;
+        // Parses a comma-delimited list of elements
+        function parseDelimitedList(kind, parseElement, considerSemicolonAsDelimiter) {
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << kind;
+            var result = [];
+            result.pos = getNodePos();
+            var commaStart = -1; // Meaning the previous token was not a comma
+            while (true) {
+                if (isListElement(kind, /*inErrorRecovery*/ false)) {
+                    result.push(parseListElement(kind, parseElement));
+                    commaStart = scanner.getTokenPos();
+                    if (parseOptional(24 /* CommaToken */)) {
+                        continue;
+                    }
+                    commaStart = -1; // Back to the state where the last token was not a comma
+                    if (isListTerminator(kind)) {
+                        break;
+                    }
+                    // We didn't get a comma, and the list wasn't terminated, explicitly parse
+                    // out a comma so we give a good error message.
+                    parseExpected(24 /* CommaToken */);
+                    // If the token was a semicolon, and the caller allows that, then skip it and
+                    // continue.  This ensures we get back on track and don't result in tons of
+                    // parse errors.  For example, this can happen when people do things like use
+                    // a semicolon to delimit object literal members.   Note: we'll have already
+                    // reported an error when we called parseExpected above.
+                    if (considerSemicolonAsDelimiter && token === 23 /* SemicolonToken */ && !scanner.hasPrecedingLineBreak()) {
+                        nextToken();
+                    }
+                    continue;
+                }
+                if (isListTerminator(kind)) {
+                    break;
+                }
+                if (abortParsingListOrMoveToNextToken(kind)) {
+                    break;
+                }
+            }
+            // Recording the trailing comma is deliberately done after the previous
+            // loop, and not just if we see a list terminator. This is because the list
+            // may have ended incorrectly, but it is still important to know if there
+            // was a trailing comma.
+            // Check if the last token was a comma.
+            if (commaStart >= 0) {
+                // Always preserve a trailing comma by marking it on the NodeArray
+                result.hasTrailingComma = true;
+            }
+            result.end = getNodeEnd();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function createMissingList() {
+            var pos = getNodePos();
+            var result = [];
+            result.pos = pos;
+            result.end = pos;
+            return result;
+        }
+        function parseBracketedList(kind, parseElement, open, close) {
+            if (parseExpected(open)) {
+                var result = parseDelimitedList(kind, parseElement);
+                parseExpected(close);
+                return result;
+            }
+            return createMissingList();
+        }
+        // The allowReservedWords parameter controls whether reserved words are permitted after the first dot
+        function parseEntityName(allowReservedWords, diagnosticMessage) {
+            var entity = parseIdentifier(diagnosticMessage);
+            while (parseOptional(21 /* DotToken */)) {
+                var node = createNode(139 /* QualifiedName */, entity.pos); // !!!
+                node.left = entity;
+                node.right = parseRightSideOfDot(allowReservedWords);
+                entity = finishNode(node);
+            }
+            return entity;
+        }
+        function parseRightSideOfDot(allowIdentifierNames) {
+            // Technically a keyword is valid here as all identifiers and keywords are identifier names.
+            // However, often we'll encounter this in error situations when the identifier or keyword
+            // is actually starting another valid construct.
+            //
+            // So, we check for the following specific case:
+            //
+            //      name.
+            //      identifierOrKeyword identifierNameOrKeyword
+            //
+            // Note: the newlines are important here.  For example, if that above code
+            // were rewritten into:
+            //
+            //      name.identifierOrKeyword
+            //      identifierNameOrKeyword
+            //
+            // Then we would consider it valid.  That's because ASI would take effect and
+            // the code would be implicitly: "name.identifierOrKeyword; identifierNameOrKeyword".
+            // In the first case though, ASI will not take effect because there is not a
+            // line terminator after the identifier or keyword.
+            if (scanner.hasPrecedingLineBreak() && ts.tokenIsIdentifierOrKeyword(token)) {
+                var matchesPattern = lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                if (matchesPattern) {
+                    // Report that we need an identifier.  However, report it right after the dot,
+                    // and not on the next token.  This is because the next token might actually
+                    // be an identifier and the error would be quite confusing.
+                    return createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Identifier_expected);
+                }
+            }
+            return allowIdentifierNames ? parseIdentifierName() : parseIdentifier();
+        }
+        function parseTemplateExpression() {
+            var template = createNode(189 /* TemplateExpression */);
+            template.head = parseTemplateLiteralFragment();
+            ts.Debug.assert(template.head.kind === 12 /* TemplateHead */, "Template head has wrong token kind");
+            var templateSpans = [];
+            templateSpans.pos = getNodePos();
+            do {
+                templateSpans.push(parseTemplateSpan());
+            } while (ts.lastOrUndefined(templateSpans).literal.kind === 13 /* TemplateMiddle */);
+            templateSpans.end = getNodeEnd();
+            template.templateSpans = templateSpans;
+            return finishNode(template);
+        }
+        function parseTemplateSpan() {
+            var span = createNode(197 /* TemplateSpan */);
+            span.expression = allowInAnd(parseExpression);
+            var literal;
+            if (token === 16 /* CloseBraceToken */) {
+                reScanTemplateToken();
+                literal = parseTemplateLiteralFragment();
+            }
+            else {
+                literal = parseExpectedToken(14 /* TemplateTail */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(16 /* CloseBraceToken */));
+            }
+            span.literal = literal;
+            return finishNode(span);
+        }
+        function parseStringLiteralTypeNode() {
+            return parseLiteralLikeNode(166 /* StringLiteralType */, /*internName*/ true);
+        }
+        function parseLiteralNode(internName) {
+            return parseLiteralLikeNode(token, internName);
+        }
+        function parseTemplateLiteralFragment() {
+            return parseLiteralLikeNode(token, /*internName*/ false);
+        }
+        function parseLiteralLikeNode(kind, internName) {
+            var node = createNode(kind);
+            var text = scanner.getTokenValue();
+            node.text = internName ? internIdentifier(text) : text;
+            if (scanner.hasExtendedUnicodeEscape()) {
+                node.hasExtendedUnicodeEscape = true;
+            }
+            if (scanner.isUnterminated()) {
+                node.isUnterminated = true;
+            }
+            var tokenPos = scanner.getTokenPos();
+            nextToken();
+            finishNode(node);
+            // Octal literals are not allowed in strict mode or ES5
+            // Note that theoretically the following condition would hold true literals like 009,
+            // which is not octal.But because of how the scanner separates the tokens, we would
+            // never get a token like this. Instead, we would get 00 and 9 as two separate tokens.
+            // We also do not need to check for negatives because any prefix operator would be part of a
+            // parent unary expression.
+            if (node.kind === 8 /* NumericLiteral */
+                && sourceText.charCodeAt(tokenPos) === 48 /* _0 */
+                && ts.isOctalDigit(sourceText.charCodeAt(tokenPos + 1))) {
+                node.isOctalLiteral = true;
+            }
+            return node;
+        }
+        // TYPES
+        function parseTypeReference() {
+            var typeName = parseEntityName(/*allowReservedWords*/ false, ts.Diagnostics.Type_expected);
+            var node = createNode(155 /* TypeReference */, typeName.pos);
+            node.typeName = typeName;
+            if (!scanner.hasPrecedingLineBreak() && token === 25 /* LessThanToken */) {
+                node.typeArguments = parseBracketedList(18 /* TypeArguments */, parseType, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
+            }
+            return finishNode(node);
+        }
+        function parseThisTypePredicate(lhs) {
+            nextToken();
+            var node = createNode(154 /* TypePredicate */, lhs.pos);
+            node.parameterName = lhs;
+            node.type = parseType();
+            return finishNode(node);
+        }
+        function parseThisTypeNode() {
+            var node = createNode(165 /* ThisType */);
+            nextToken();
+            return finishNode(node);
+        }
+        function parseTypeQuery() {
+            var node = createNode(158 /* TypeQuery */);
+            parseExpected(101 /* TypeOfKeyword */);
+            node.exprName = parseEntityName(/*allowReservedWords*/ true);
+            return finishNode(node);
+        }
+        function parseTypeParameter() {
+            var node = createNode(141 /* TypeParameter */);
+            node.name = parseIdentifier();
+            if (parseOptional(83 /* ExtendsKeyword */)) {
+                // It's not uncommon for people to write improper constraints to a generic.  If the
+                // user writes a constraint that is an expression and not an actual type, then parse
+                // it out as an expression (so we can recover well), but report that a type is needed
+                // instead.
+                if (isStartOfType() || !isStartOfExpression()) {
+                    node.constraint = parseType();
+                }
+                else {
+                    // It was not a type, and it looked like an expression.  Parse out an expression
+                    // here so we recover well.  Note: it is important that we call parseUnaryExpression
+                    // and not parseExpression here.  If the user has:
+                    //
+                    //      <T extends "">
+                    //
+                    // We do *not* want to consume the  >  as we're consuming the expression for "".
+                    node.expression = parseUnaryExpressionOrHigher();
+                }
+            }
+            return finishNode(node);
+        }
+        function parseTypeParameters() {
+            if (token === 25 /* LessThanToken */) {
+                return parseBracketedList(17 /* TypeParameters */, parseTypeParameter, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
+            }
+        }
+        function parseParameterType() {
+            if (parseOptional(54 /* ColonToken */)) {
+                return parseType();
+            }
+            return undefined;
+        }
+        function isStartOfParameter() {
+            return token === 22 /* DotDotDotToken */ || isIdentifierOrPattern() || ts.isModifierKind(token) || token === 55 /* AtToken */ || token === 97 /* ThisKeyword */;
+        }
+        function setModifiers(node, modifiers) {
+            if (modifiers) {
+                node.flags |= modifiers.flags;
+                node.modifiers = modifiers;
+            }
+        }
+        function parseParameter() {
+            var node = createNode(142 /* Parameter */);
+            if (token === 97 /* ThisKeyword */) {
+                node.name = createIdentifier(/*isIdentifier*/ true, undefined);
+                node.type = parseParameterType();
+                return finishNode(node);
+            }
+            node.decorators = parseDecorators();
+            setModifiers(node, parseModifiers());
+            node.dotDotDotToken = parseOptionalToken(22 /* DotDotDotToken */);
+            // FormalParameter [Yield,Await]:
+            //      BindingElement[?Yield,?Await]
+            node.name = parseIdentifierOrPattern();
+            if (ts.getFullWidth(node.name) === 0 && node.flags === 0 && ts.isModifierKind(token)) {
+                // in cases like
+                // 'use strict'
+                // function foo(static)
+                // isParameter('static') === true, because of isModifier('static')
+                // however 'static' is not a legal identifier in a strict mode.
+                // so result of this function will be ParameterDeclaration (flags = 0, name = missing, type = undefined, initializer = undefined)
+                // and current token will not change => parsing of the enclosing parameter list will last till the end of time (or OOM)
+                // to avoid this we'll advance cursor to the next token.
+                nextToken();
+            }
+            node.questionToken = parseOptionalToken(53 /* QuestionToken */);
+            node.type = parseParameterType();
+            node.initializer = parseBindingElementInitializer(/*inParameter*/ true);
+            // Do not check for initializers in an ambient context for parameters. This is not
+            // a grammar error because the grammar allows arbitrary call signatures in
+            // an ambient context.
+            // It is actually not necessary for this to be an error at all. The reason is that
+            // function/constructor implementations are syntactically disallowed in ambient
+            // contexts. In addition, parameter initializers are semantically disallowed in
+            // overload signatures. So parameter initializers are transitively disallowed in
+            // ambient contexts.
+            return addJSDocComment(finishNode(node));
+        }
+        function parseBindingElementInitializer(inParameter) {
+            return inParameter ? parseParameterInitializer() : parseNonParameterInitializer();
+        }
+        function parseParameterInitializer() {
+            return parseInitializer(/*inParameter*/ true);
+        }
+        function fillSignature(returnToken, yieldContext, awaitContext, requireCompleteParameterList, signature) {
+            var returnTokenRequired = returnToken === 34 /* EqualsGreaterThanToken */;
+            signature.typeParameters = parseTypeParameters();
+            signature.parameters = parseParameterList(yieldContext, awaitContext, requireCompleteParameterList);
+            if (returnTokenRequired) {
+                parseExpected(returnToken);
+                signature.type = parseTypeOrTypePredicate();
+            }
+            else if (parseOptional(returnToken)) {
+                signature.type = parseTypeOrTypePredicate();
+            }
+        }
+        function parseParameterList(yieldContext, awaitContext, requireCompleteParameterList) {
+            // FormalParameters [Yield,Await]: (modified)
+            //      [empty]
+            //      FormalParameterList[?Yield,Await]
+            //
+            // FormalParameter[Yield,Await]: (modified)
+            //      BindingElement[?Yield,Await]
+            //
+            // BindingElement [Yield,Await]: (modified)
+            //      SingleNameBinding[?Yield,?Await]
+            //      BindingPattern[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
+            //
+            // SingleNameBinding [Yield,Await]:
+            //      BindingIdentifier[?Yield,?Await]Initializer [In, ?Yield,?Await] opt
+            if (parseExpected(17 /* OpenParenToken */)) {
+                var savedYieldContext = inYieldContext();
+                var savedAwaitContext = inAwaitContext();
+                setYieldContext(yieldContext);
+                setAwaitContext(awaitContext);
+                var result = parseDelimitedList(16 /* Parameters */, parseParameter);
+                setYieldContext(savedYieldContext);
+                setAwaitContext(savedAwaitContext);
+                if (!parseExpected(18 /* CloseParenToken */) && requireCompleteParameterList) {
+                    // Caller insisted that we had to end with a )   We didn't.  So just return
+                    // undefined here.
+                    return undefined;
+                }
+                return result;
+            }
+            // We didn't even have an open paren.  If the caller requires a complete parameter list,
+            // we definitely can't provide that.  However, if they're ok with an incomplete one,
+            // then just return an empty set of parameters.
+            return requireCompleteParameterList ? undefined : createMissingList();
+        }
+        function parseTypeMemberSemicolon() {
+            // We allow type members to be separated by commas or (possibly ASI) semicolons.
+            // First check if it was a comma.  If so, we're done with the member.
+            if (parseOptional(24 /* CommaToken */)) {
+                return;
+            }
+            // Didn't have a comma.  We must have a (possible ASI) semicolon.
+            parseSemicolon();
+        }
+        function parseSignatureMember(kind) {
+            var node = createNode(kind);
+            if (kind === 152 /* ConstructSignature */) {
+                parseExpected(92 /* NewKeyword */);
+            }
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            parseTypeMemberSemicolon();
+            return finishNode(node);
+        }
+        function isIndexSignature() {
+            if (token !== 19 /* OpenBracketToken */) {
+                return false;
+            }
+            return lookAhead(isUnambiguouslyIndexSignature);
+        }
+        function isUnambiguouslyIndexSignature() {
+            // The only allowed sequence is:
+            //
+            //   [id:
+            //
+            // However, for error recovery, we also check the following cases:
+            //
+            //   [...
+            //   [id,
+            //   [id?,
+            //   [id?:
+            //   [id?]
+            //   [public id
+            //   [private id
+            //   [protected id
+            //   []
+            //
+            nextToken();
+            if (token === 22 /* DotDotDotToken */ || token === 20 /* CloseBracketToken */) {
+                return true;
+            }
+            if (ts.isModifierKind(token)) {
+                nextToken();
+                if (isIdentifier()) {
+                    return true;
+                }
+            }
+            else if (!isIdentifier()) {
+                return false;
+            }
+            else {
+                // Skip the identifier
+                nextToken();
+            }
+            // A colon signifies a well formed indexer
+            // A comma should be a badly formed indexer because comma expressions are not allowed
+            // in computed properties.
+            if (token === 54 /* ColonToken */ || token === 24 /* CommaToken */) {
+                return true;
+            }
+            // Question mark could be an indexer with an optional property,
+            // or it could be a conditional expression in a computed property.
+            if (token !== 53 /* QuestionToken */) {
+                return false;
+            }
+            // If any of the following tokens are after the question mark, it cannot
+            // be a conditional expression, so treat it as an indexer.
+            nextToken();
+            return token === 54 /* ColonToken */ || token === 24 /* CommaToken */ || token === 20 /* CloseBracketToken */;
+        }
+        function parseIndexSignatureDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(153 /* IndexSignature */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.parameters = parseBracketedList(16 /* Parameters */, parseParameter, 19 /* OpenBracketToken */, 20 /* CloseBracketToken */);
+            node.type = parseTypeAnnotation();
+            parseTypeMemberSemicolon();
+            return finishNode(node);
+        }
+        function parsePropertyOrMethodSignature(fullStart, modifiers) {
+            var name = parsePropertyName();
+            var questionToken = parseOptionalToken(53 /* QuestionToken */);
+            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
+                var method = createNode(146 /* MethodSignature */, fullStart);
+                setModifiers(method, modifiers);
+                method.name = name;
+                method.questionToken = questionToken;
+                // Method signatures don't exist in expression contexts.  So they have neither
+                // [Yield] nor [Await]
+                fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, method);
+                parseTypeMemberSemicolon();
+                return finishNode(method);
+            }
+            else {
+                var property = createNode(144 /* PropertySignature */, fullStart);
+                setModifiers(property, modifiers);
+                property.name = name;
+                property.questionToken = questionToken;
+                property.type = parseTypeAnnotation();
+                if (token === 56 /* EqualsToken */) {
+                    // Although type literal properties cannot not have initializers, we attempt
+                    // to parse an initializer so we can report in the checker that an interface
+                    // property or type literal property cannot have an initializer.
+                    property.initializer = parseNonParameterInitializer();
+                }
+                parseTypeMemberSemicolon();
+                return finishNode(property);
+            }
+        }
+        function isTypeMemberStart() {
+            var idToken;
+            // Return true if we have the start of a signature member
+            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
+                return true;
+            }
+            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier
+            while (ts.isModifierKind(token)) {
+                idToken = token;
+                nextToken();
+            }
+            // Index signatures and computed property names are type members
+            if (token === 19 /* OpenBracketToken */) {
+                return true;
+            }
+            // Try to get the first property-like token following all modifiers
+            if (isLiteralPropertyName()) {
+                idToken = token;
+                nextToken();
+            }
+            // If we were able to get any potential identifier, check that it is
+            // the start of a member declaration
+            if (idToken) {
+                return token === 17 /* OpenParenToken */ ||
+                    token === 25 /* LessThanToken */ ||
+                    token === 53 /* QuestionToken */ ||
+                    token === 54 /* ColonToken */ ||
+                    canParseSemicolon();
+            }
+            return false;
+        }
+        function parseTypeMember() {
+            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
+                return parseSignatureMember(151 /* CallSignature */);
+            }
+            if (token === 92 /* NewKeyword */ && lookAhead(isStartOfConstructSignature)) {
+                return parseSignatureMember(152 /* ConstructSignature */);
+            }
+            var fullStart = getNodePos();
+            var modifiers = parseModifiers();
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, /*decorators*/ undefined, modifiers);
+            }
+            return parsePropertyOrMethodSignature(fullStart, modifiers);
+        }
+        function isStartOfConstructSignature() {
+            nextToken();
+            return token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */;
+        }
+        function parseTypeLiteral() {
+            var node = createNode(159 /* TypeLiteral */);
+            node.members = parseObjectTypeMembers();
+            return finishNode(node);
+        }
+        function parseObjectTypeMembers() {
+            var members;
+            if (parseExpected(15 /* OpenBraceToken */)) {
+                members = parseList(4 /* TypeMembers */, parseTypeMember);
+                parseExpected(16 /* CloseBraceToken */);
+            }
+            else {
+                members = createMissingList();
+            }
+            return members;
+        }
+        function parseTupleType() {
+            var node = createNode(161 /* TupleType */);
+            node.elementTypes = parseBracketedList(19 /* TupleElementTypes */, parseType, 19 /* OpenBracketToken */, 20 /* CloseBracketToken */);
+            return finishNode(node);
+        }
+        function parseParenthesizedType() {
+            var node = createNode(164 /* ParenthesizedType */);
+            parseExpected(17 /* OpenParenToken */);
+            node.type = parseType();
+            parseExpected(18 /* CloseParenToken */);
+            return finishNode(node);
+        }
+        function parseFunctionOrConstructorType(kind) {
+            var node = createNode(kind);
+            if (kind === 157 /* ConstructorType */) {
+                parseExpected(92 /* NewKeyword */);
+            }
+            fillSignature(34 /* EqualsGreaterThanToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            return finishNode(node);
+        }
+        function parseKeywordAndNoDot() {
+            var node = parseTokenNode();
+            return token === 21 /* DotToken */ ? undefined : node;
+        }
+        function parseNonArrayType() {
+            switch (token) {
+                case 117 /* AnyKeyword */:
+                case 132 /* StringKeyword */:
+                case 130 /* NumberKeyword */:
+                case 120 /* BooleanKeyword */:
+                case 133 /* SymbolKeyword */:
+                case 135 /* UndefinedKeyword */:
+                case 127 /* NeverKeyword */:
+                    // If these are followed by a dot, then parse these out as a dotted type reference instead.
+                    var node = tryParse(parseKeywordAndNoDot);
+                    return node || parseTypeReference();
+                case 9 /* StringLiteral */:
+                    return parseStringLiteralTypeNode();
+                case 103 /* VoidKeyword */:
+                case 93 /* NullKeyword */:
+                    return parseTokenNode();
+                case 97 /* ThisKeyword */: {
+                    var thisKeyword = parseThisTypeNode();
+                    if (token === 124 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
+                        return parseThisTypePredicate(thisKeyword);
+                    }
+                    else {
+                        return thisKeyword;
+                    }
+                }
+                case 101 /* TypeOfKeyword */:
+                    return parseTypeQuery();
+                case 15 /* OpenBraceToken */:
+                    return parseTypeLiteral();
+                case 19 /* OpenBracketToken */:
+                    return parseTupleType();
+                case 17 /* OpenParenToken */:
+                    return parseParenthesizedType();
+                default:
+                    return parseTypeReference();
+            }
+        }
+        function isStartOfType() {
+            switch (token) {
+                case 117 /* AnyKeyword */:
+                case 132 /* StringKeyword */:
+                case 130 /* NumberKeyword */:
+                case 120 /* BooleanKeyword */:
+                case 133 /* SymbolKeyword */:
+                case 103 /* VoidKeyword */:
+                case 135 /* UndefinedKeyword */:
+                case 93 /* NullKeyword */:
+                case 97 /* ThisKeyword */:
+                case 101 /* TypeOfKeyword */:
+                case 127 /* NeverKeyword */:
+                case 15 /* OpenBraceToken */:
+                case 19 /* OpenBracketToken */:
+                case 25 /* LessThanToken */:
+                case 92 /* NewKeyword */:
+                case 9 /* StringLiteral */:
+                    return true;
+                case 17 /* OpenParenToken */:
+                    // Only consider '(' the start of a type if followed by ')', '...', an identifier, a modifier,
+                    // or something that starts a type. We don't want to consider things like '(1)' a type.
+                    return lookAhead(isStartOfParenthesizedOrFunctionType);
+                default:
+                    return isIdentifier();
+            }
+        }
+        function isStartOfParenthesizedOrFunctionType() {
+            nextToken();
+            return token === 18 /* CloseParenToken */ || isStartOfParameter() || isStartOfType();
+        }
+        function parseArrayTypeOrHigher() {
+            var type = parseNonArrayType();
+            while (!scanner.hasPrecedingLineBreak() && parseOptional(19 /* OpenBracketToken */)) {
+                parseExpected(20 /* CloseBracketToken */);
+                var node = createNode(160 /* ArrayType */, type.pos);
+                node.elementType = type;
+                type = finishNode(node);
+            }
+            return type;
+        }
+        function parseUnionOrIntersectionType(kind, parseConstituentType, operator) {
+            var type = parseConstituentType();
+            if (token === operator) {
+                var types = [type];
+                types.pos = type.pos;
+                while (parseOptional(operator)) {
+                    types.push(parseConstituentType());
+                }
+                types.end = getNodeEnd();
+                var node = createNode(kind, type.pos);
+                node.types = types;
+                type = finishNode(node);
+            }
+            return type;
+        }
+        function parseIntersectionTypeOrHigher() {
+            return parseUnionOrIntersectionType(163 /* IntersectionType */, parseArrayTypeOrHigher, 46 /* AmpersandToken */);
+        }
+        function parseUnionTypeOrHigher() {
+            return parseUnionOrIntersectionType(162 /* UnionType */, parseIntersectionTypeOrHigher, 47 /* BarToken */);
+        }
+        function isStartOfFunctionType() {
+            if (token === 25 /* LessThanToken */) {
+                return true;
+            }
+            return token === 17 /* OpenParenToken */ && lookAhead(isUnambiguouslyStartOfFunctionType);
+        }
+        function skipParameterStart() {
+            if (ts.isModifierKind(token)) {
+                // Skip modifiers
+                parseModifiers();
+            }
+            if (isIdentifier() || token === 97 /* ThisKeyword */) {
+                nextToken();
+                return true;
+            }
+            if (token === 19 /* OpenBracketToken */ || token === 15 /* OpenBraceToken */) {
+                // Return true if we can parse an array or object binding pattern with no errors
+                var previousErrorCount = parseDiagnostics.length;
+                parseIdentifierOrPattern();
+                return previousErrorCount === parseDiagnostics.length;
+            }
+            return false;
+        }
+        function isUnambiguouslyStartOfFunctionType() {
+            nextToken();
+            if (token === 18 /* CloseParenToken */ || token === 22 /* DotDotDotToken */) {
+                // ( )
+                // ( ...
+                return true;
+            }
+            if (skipParameterStart()) {
+                // We successfully skipped modifiers (if any) and an identifier or binding pattern,
+                // now see if we have something that indicates a parameter declaration
+                if (token === 54 /* ColonToken */ || token === 24 /* CommaToken */ ||
+                    token === 53 /* QuestionToken */ || token === 56 /* EqualsToken */) {
+                    // ( xxx :
+                    // ( xxx ,
+                    // ( xxx ?
+                    // ( xxx =
+                    return true;
+                }
+                if (token === 18 /* CloseParenToken */) {
+                    nextToken();
+                    if (token === 34 /* EqualsGreaterThanToken */) {
+                        // ( xxx ) =>
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function parseTypeOrTypePredicate() {
+            var typePredicateVariable = isIdentifier() && tryParse(parseTypePredicatePrefix);
+            var type = parseType();
+            if (typePredicateVariable) {
+                var node = createNode(154 /* TypePredicate */, typePredicateVariable.pos);
+                node.parameterName = typePredicateVariable;
+                node.type = type;
+                return finishNode(node);
+            }
+            else {
+                return type;
+            }
+        }
+        function parseTypePredicatePrefix() {
+            var id = parseIdentifier();
+            if (token === 124 /* IsKeyword */ && !scanner.hasPrecedingLineBreak()) {
+                nextToken();
+                return id;
+            }
+        }
+        function parseType() {
+            // The rules about 'yield' only apply to actual code/expression contexts.  They don't
+            // apply to 'type' contexts.  So we disable these parameters here before moving on.
+            return doOutsideOfContext(41943040 /* TypeExcludesFlags */, parseTypeWorker);
+        }
+        function parseTypeWorker() {
+            if (isStartOfFunctionType()) {
+                return parseFunctionOrConstructorType(156 /* FunctionType */);
+            }
+            if (token === 92 /* NewKeyword */) {
+                return parseFunctionOrConstructorType(157 /* ConstructorType */);
+            }
+            return parseUnionTypeOrHigher();
+        }
+        function parseTypeAnnotation() {
+            return parseOptional(54 /* ColonToken */) ? parseType() : undefined;
+        }
+        // EXPRESSIONS
+        function isStartOfLeftHandSideExpression() {
+            switch (token) {
+                case 97 /* ThisKeyword */:
+                case 95 /* SuperKeyword */:
+                case 93 /* NullKeyword */:
+                case 99 /* TrueKeyword */:
+                case 84 /* FalseKeyword */:
+                case 8 /* NumericLiteral */:
+                case 9 /* StringLiteral */:
+                case 11 /* NoSubstitutionTemplateLiteral */:
+                case 12 /* TemplateHead */:
+                case 17 /* OpenParenToken */:
+                case 19 /* OpenBracketToken */:
+                case 15 /* OpenBraceToken */:
+                case 87 /* FunctionKeyword */:
+                case 73 /* ClassKeyword */:
+                case 92 /* NewKeyword */:
+                case 39 /* SlashToken */:
+                case 61 /* SlashEqualsToken */:
+                case 69 /* Identifier */:
+                    return true;
+                default:
+                    return isIdentifier();
+            }
+        }
+        function isStartOfExpression() {
+            if (isStartOfLeftHandSideExpression()) {
+                return true;
+            }
+            switch (token) {
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                case 50 /* TildeToken */:
+                case 49 /* ExclamationToken */:
+                case 78 /* DeleteKeyword */:
+                case 101 /* TypeOfKeyword */:
+                case 103 /* VoidKeyword */:
+                case 41 /* PlusPlusToken */:
+                case 42 /* MinusMinusToken */:
+                case 25 /* LessThanToken */:
+                case 119 /* AwaitKeyword */:
+                case 114 /* YieldKeyword */:
+                    // Yield/await always starts an expression.  Either it is an identifier (in which case
+                    // it is definitely an expression).  Or it's a keyword (either because we're in
+                    // a generator or async function, or in strict mode (or both)) and it started a yield or await expression.
+                    return true;
+                default:
+                    // Error tolerance.  If we see the start of some binary operator, we consider
+                    // that the start of an expression.  That way we'll parse out a missing identifier,
+                    // give a good message about an identifier being missing, and then consume the
+                    // rest of the binary expression.
+                    if (isBinaryOperator()) {
+                        return true;
+                    }
+                    return isIdentifier();
+            }
+        }
+        function isStartOfExpressionStatement() {
+            // As per the grammar, none of '{' or 'function' or 'class' can start an expression statement.
+            return token !== 15 /* OpenBraceToken */ &&
+                token !== 87 /* FunctionKeyword */ &&
+                token !== 73 /* ClassKeyword */ &&
+                token !== 55 /* AtToken */ &&
+                isStartOfExpression();
+        }
+        function parseExpression() {
+            // Expression[in]:
+            //      AssignmentExpression[in]
+            //      Expression[in] , AssignmentExpression[in]
+            // clear the decorator context when parsing Expression, as it should be unambiguous when parsing a decorator
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ false);
+            }
+            var expr = parseAssignmentExpressionOrHigher();
+            var operatorToken;
+            while ((operatorToken = parseOptionalToken(24 /* CommaToken */))) {
+                expr = makeBinaryExpression(expr, operatorToken, parseAssignmentExpressionOrHigher());
+            }
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ true);
+            }
+            return expr;
+        }
+        function parseInitializer(inParameter) {
+            if (token !== 56 /* EqualsToken */) {
+                // It's not uncommon during typing for the user to miss writing the '=' token.  Check if
+                // there is no newline after the last token and if we're on an expression.  If so, parse
+                // this as an equals-value clause with a missing equals.
+                // NOTE: There are two places where we allow equals-value clauses.  The first is in a
+                // variable declarator.  The second is with a parameter.  For variable declarators
+                // it's more likely that a { would be a allowed (as an object literal).  While this
+                // is also allowed for parameters, the risk is that we consume the { as an object
+                // literal when it really will be for the block following the parameter.
+                if (scanner.hasPrecedingLineBreak() || (inParameter && token === 15 /* OpenBraceToken */) || !isStartOfExpression()) {
+                    // preceding line break, open brace in a parameter (likely a function body) or current token is not an expression -
+                    // do not try to parse initializer
+                    return undefined;
+                }
+            }
+            // Initializer[In, Yield] :
+            //     = AssignmentExpression[?In, ?Yield]
+            parseExpected(56 /* EqualsToken */);
+            return parseAssignmentExpressionOrHigher();
+        }
+        function parseAssignmentExpressionOrHigher() {
+            //  AssignmentExpression[in,yield]:
+            //      1) ConditionalExpression[?in,?yield]
+            //      2) LeftHandSideExpression = AssignmentExpression[?in,?yield]
+            //      3) LeftHandSideExpression AssignmentOperator AssignmentExpression[?in,?yield]
+            //      4) ArrowFunctionExpression[?in,?yield]
+            //      5) AsyncArrowFunctionExpression[in,yield,await]
+            //      6) [+Yield] YieldExpression[?In]
+            //
+            // Note: for ease of implementation we treat productions '2' and '3' as the same thing.
+            // (i.e. they're both BinaryExpressions with an assignment operator in it).
+            // First, do the simple check if we have a YieldExpression (production '5').
+            if (isYieldExpression()) {
+                return parseYieldExpression();
+            }
+            // Then, check if we have an arrow function (production '4' and '5') that starts with a parenthesized
+            // parameter list or is an async arrow function.
+            // AsyncArrowFunctionExpression:
+            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
+            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
+            // Production (1) of AsyncArrowFunctionExpression is parsed in "tryParseAsyncSimpleArrowFunctionExpression".
+            // And production (2) is parsed in "tryParseParenthesizedArrowFunctionExpression".
+            //
+            // If we do successfully parse arrow-function, we must *not* recurse for productions 1, 2 or 3. An ArrowFunction is
+            // not a  LeftHandSideExpression, nor does it start a ConditionalExpression.  So we are done
+            // with AssignmentExpression if we see one.
+            var arrowExpression = tryParseParenthesizedArrowFunctionExpression() || tryParseAsyncSimpleArrowFunctionExpression();
+            if (arrowExpression) {
+                return arrowExpression;
+            }
+            // Now try to see if we're in production '1', '2' or '3'.  A conditional expression can
+            // start with a LogicalOrExpression, while the assignment productions can only start with
+            // LeftHandSideExpressions.
+            //
+            // So, first, we try to just parse out a BinaryExpression.  If we get something that is a
+            // LeftHandSide or higher, then we can try to parse out the assignment expression part.
+            // Otherwise, we try to parse out the conditional expression bit.  We want to allow any
+            // binary expression here, so we pass in the 'lowest' precedence here so that it matches
+            // and consumes anything.
+            var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
+            // To avoid a look-ahead, we did not handle the case of an arrow function with a single un-parenthesized
+            // parameter ('x => ...') above. We handle it here by checking if the parsed expression was a single
+            // identifier and the current token is an arrow.
+            if (expr.kind === 69 /* Identifier */ && token === 34 /* EqualsGreaterThanToken */) {
+                return parseSimpleArrowFunctionExpression(expr);
+            }
+            // Now see if we might be in cases '2' or '3'.
+            // If the expression was a LHS expression, and we have an assignment operator, then
+            // we're in '2' or '3'. Consume the assignment and return.
+            //
+            // Note: we call reScanGreaterToken so that we get an appropriately merged token
+            // for cases like > > =  becoming >>=
+            if (ts.isLeftHandSideExpression(expr) && ts.isAssignmentOperator(reScanGreaterToken())) {
+                return makeBinaryExpression(expr, parseTokenNode(), parseAssignmentExpressionOrHigher());
+            }
+            // It wasn't an assignment or a lambda.  This is a conditional expression:
+            return parseConditionalExpressionRest(expr);
+        }
+        function isYieldExpression() {
+            if (token === 114 /* YieldKeyword */) {
+                // If we have a 'yield' keyword, and this is a context where yield expressions are
+                // allowed, then definitely parse out a yield expression.
+                if (inYieldContext()) {
+                    return true;
+                }
+                // We're in a context where 'yield expr' is not allowed.  However, if we can
+                // definitely tell that the user was trying to parse a 'yield expr' and not
+                // just a normal expr that start with a 'yield' identifier, then parse out
+                // a 'yield expr'.  We can then report an error later that they are only
+                // allowed in generator expressions.
+                //
+                // for example, if we see 'yield(foo)', then we'll have to treat that as an
+                // invocation expression of something called 'yield'.  However, if we have
+                // 'yield foo' then that is not legal as a normal expression, so we can
+                // definitely recognize this as a yield expression.
+                //
+                // for now we just check if the next token is an identifier.  More heuristics
+                // can be added here later as necessary.  We just need to make sure that we
+                // don't accidentally consume something legal.
+                return lookAhead(nextTokenIsIdentifierOrKeywordOrNumberOnSameLine);
+            }
+            return false;
+        }
+        function nextTokenIsIdentifierOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && isIdentifier();
+        }
+        function parseYieldExpression() {
+            var node = createNode(190 /* YieldExpression */);
+            // YieldExpression[In] :
+            //      yield
+            //      yield [no LineTerminator here] [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
+            //      yield [no LineTerminator here] * [Lexical goal InputElementRegExp]AssignmentExpression[?In, Yield]
+            nextToken();
+            if (!scanner.hasPrecedingLineBreak() &&
+                (token === 37 /* AsteriskToken */ || isStartOfExpression())) {
+                node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
+                node.expression = parseAssignmentExpressionOrHigher();
+                return finishNode(node);
+            }
+            else {
+                // if the next token is not on the same line as yield.  or we don't have an '*' or
+                // the start of an expression, then this is just a simple "yield" expression.
+                return finishNode(node);
+            }
+        }
+        function parseSimpleArrowFunctionExpression(identifier, asyncModifier) {
+            ts.Debug.assert(token === 34 /* EqualsGreaterThanToken */, "parseSimpleArrowFunctionExpression should only have been called if we had a =>");
+            var node;
+            if (asyncModifier) {
+                node = createNode(180 /* ArrowFunction */, asyncModifier.pos);
+                setModifiers(node, asyncModifier);
+            }
+            else {
+                node = createNode(180 /* ArrowFunction */, identifier.pos);
+            }
+            var parameter = createNode(142 /* Parameter */, identifier.pos);
+            parameter.name = identifier;
+            finishNode(parameter);
+            node.parameters = [parameter];
+            node.parameters.pos = parameter.pos;
+            node.parameters.end = parameter.end;
+            node.equalsGreaterThanToken = parseExpectedToken(34 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
+            node.body = parseArrowFunctionExpressionBody(/*isAsync*/ !!asyncModifier);
+            return finishNode(node);
+        }
+        function tryParseParenthesizedArrowFunctionExpression() {
+            var triState = isParenthesizedArrowFunctionExpression();
+            if (triState === 0 /* False */) {
+                // It's definitely not a parenthesized arrow function expression.
+                return undefined;
+            }
+            // If we definitely have an arrow function, then we can just parse one, not requiring a
+            // following => or { token. Otherwise, we *might* have an arrow function.  Try to parse
+            // it out, but don't allow any ambiguity, and return 'undefined' if this could be an
+            // expression instead.
+            var arrowFunction = triState === 1 /* True */
+                ? parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ true)
+                : tryParse(parsePossibleParenthesizedArrowFunctionExpressionHead);
+            if (!arrowFunction) {
+                // Didn't appear to actually be a parenthesized arrow function.  Just bail out.
+                return undefined;
+            }
+            var isAsync = !!(arrowFunction.flags & 256 /* Async */);
+            // If we have an arrow, then try to parse the body. Even if not, try to parse if we
+            // have an opening brace, just in case we're in an error state.
+            var lastToken = token;
+            arrowFunction.equalsGreaterThanToken = parseExpectedToken(34 /* EqualsGreaterThanToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, "=>");
+            arrowFunction.body = (lastToken === 34 /* EqualsGreaterThanToken */ || lastToken === 15 /* OpenBraceToken */)
+                ? parseArrowFunctionExpressionBody(isAsync)
+                : parseIdentifier();
+            return finishNode(arrowFunction);
+        }
+        //  True        -> We definitely expect a parenthesized arrow function here.
+        //  False       -> There *cannot* be a parenthesized arrow function here.
+        //  Unknown     -> There *might* be a parenthesized arrow function here.
+        //                 Speculatively look ahead to be sure, and rollback if not.
+        function isParenthesizedArrowFunctionExpression() {
+            if (token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */ || token === 118 /* AsyncKeyword */) {
+                return lookAhead(isParenthesizedArrowFunctionExpressionWorker);
+            }
+            if (token === 34 /* EqualsGreaterThanToken */) {
+                // ERROR RECOVERY TWEAK:
+                // If we see a standalone => try to parse it as an arrow function expression as that's
+                // likely what the user intended to write.
+                return 1 /* True */;
+            }
+            // Definitely not a parenthesized arrow function.
+            return 0 /* False */;
+        }
+        function isParenthesizedArrowFunctionExpressionWorker() {
+            if (token === 118 /* AsyncKeyword */) {
+                nextToken();
+                if (scanner.hasPrecedingLineBreak()) {
+                    return 0 /* False */;
+                }
+                if (token !== 17 /* OpenParenToken */ && token !== 25 /* LessThanToken */) {
+                    return 0 /* False */;
+                }
+            }
+            var first = token;
+            var second = nextToken();
+            if (first === 17 /* OpenParenToken */) {
+                if (second === 18 /* CloseParenToken */) {
+                    // Simple cases: "() =>", "(): ", and  "() {".
+                    // This is an arrow function with no parameters.
+                    // The last one is not actually an arrow function,
+                    // but this is probably what the user intended.
+                    var third = nextToken();
+                    switch (third) {
+                        case 34 /* EqualsGreaterThanToken */:
+                        case 54 /* ColonToken */:
+                        case 15 /* OpenBraceToken */:
+                            return 1 /* True */;
+                        default:
+                            return 0 /* False */;
+                    }
+                }
+                // If encounter "([" or "({", this could be the start of a binding pattern.
+                // Examples:
+                //      ([ x ]) => { }
+                //      ({ x }) => { }
+                //      ([ x ])
+                //      ({ x })
+                if (second === 19 /* OpenBracketToken */ || second === 15 /* OpenBraceToken */) {
+                    return 2 /* Unknown */;
+                }
+                // Simple case: "(..."
+                // This is an arrow function with a rest parameter.
+                if (second === 22 /* DotDotDotToken */) {
+                    return 1 /* True */;
+                }
+                // If we had "(" followed by something that's not an identifier,
+                // then this definitely doesn't look like a lambda.
+                // Note: we could be a little more lenient and allow
+                // "(public" or "(private". These would not ever actually be allowed,
+                // but we could provide a good error message instead of bailing out.
+                if (!isIdentifier()) {
+                    return 0 /* False */;
+                }
+                // If we have something like "(a:", then we must have a
+                // type-annotated parameter in an arrow function expression.
+                if (nextToken() === 54 /* ColonToken */) {
+                    return 1 /* True */;
+                }
+                // This *could* be a parenthesized arrow function.
+                // Return Unknown to let the caller know.
+                return 2 /* Unknown */;
+            }
+            else {
+                ts.Debug.assert(first === 25 /* LessThanToken */);
+                // If we have "<" not followed by an identifier,
+                // then this definitely is not an arrow function.
+                if (!isIdentifier()) {
+                    return 0 /* False */;
+                }
+                // JSX overrides
+                if (sourceFile.languageVariant === 1 /* JSX */) {
+                    var isArrowFunctionInJsx = lookAhead(function () {
+                        var third = nextToken();
+                        if (third === 83 /* ExtendsKeyword */) {
+                            var fourth = nextToken();
+                            switch (fourth) {
+                                case 56 /* EqualsToken */:
+                                case 27 /* GreaterThanToken */:
+                                    return false;
+                                default:
+                                    return true;
+                            }
+                        }
+                        else if (third === 24 /* CommaToken */) {
+                            return true;
+                        }
+                        return false;
+                    });
+                    if (isArrowFunctionInJsx) {
+                        return 1 /* True */;
+                    }
+                    return 0 /* False */;
+                }
+                // This *could* be a parenthesized arrow function.
+                return 2 /* Unknown */;
+            }
+        }
+        function parsePossibleParenthesizedArrowFunctionExpressionHead() {
+            return parseParenthesizedArrowFunctionExpressionHead(/*allowAmbiguity*/ false);
+        }
+        function tryParseAsyncSimpleArrowFunctionExpression() {
+            // We do a check here so that we won't be doing unnecessarily call to "lookAhead"
+            if (token === 118 /* AsyncKeyword */) {
+                var isUnParenthesizedAsyncArrowFunction = lookAhead(isUnParenthesizedAsyncArrowFunctionWorker);
+                if (isUnParenthesizedAsyncArrowFunction === 1 /* True */) {
+                    var asyncModifier = parseModifiersForArrowFunction();
+                    var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
+                    return parseSimpleArrowFunctionExpression(expr, asyncModifier);
+                }
+            }
+            return undefined;
+        }
+        function isUnParenthesizedAsyncArrowFunctionWorker() {
+            // AsyncArrowFunctionExpression:
+            //      1) async[no LineTerminator here]AsyncArrowBindingIdentifier[?Yield][no LineTerminator here]=>AsyncConciseBody[?In]
+            //      2) CoverCallExpressionAndAsyncArrowHead[?Yield, ?Await][no LineTerminator here]=>AsyncConciseBody[?In]
+            if (token === 118 /* AsyncKeyword */) {
+                nextToken();
+                // If the "async" is followed by "=>" token then it is not a begining of an async arrow-function
+                // but instead a simple arrow-function which will be parsed inside "parseAssignmentExpressionOrHigher"
+                if (scanner.hasPrecedingLineBreak() || token === 34 /* EqualsGreaterThanToken */) {
+                    return 0 /* False */;
+                }
+                // Check for un-parenthesized AsyncArrowFunction
+                var expr = parseBinaryExpressionOrHigher(/*precedence*/ 0);
+                if (!scanner.hasPrecedingLineBreak() && expr.kind === 69 /* Identifier */ && token === 34 /* EqualsGreaterThanToken */) {
+                    return 1 /* True */;
+                }
+            }
+            return 0 /* False */;
+        }
+        function parseParenthesizedArrowFunctionExpressionHead(allowAmbiguity) {
+            var node = createNode(180 /* ArrowFunction */);
+            setModifiers(node, parseModifiersForArrowFunction());
+            var isAsync = !!(node.flags & 256 /* Async */);
+            // Arrow functions are never generators.
+            //
+            // If we're speculatively parsing a signature for a parenthesized arrow function, then
+            // we have to have a complete parameter list.  Otherwise we might see something like
+            // a => (b => c)
+            // And think that "(b =>" was actually a parenthesized arrow function with a missing
+            // close paren.
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ !allowAmbiguity, node);
+            // If we couldn't get parameters, we definitely could not parse out an arrow function.
+            if (!node.parameters) {
+                return undefined;
+            }
+            // Parsing a signature isn't enough.
+            // Parenthesized arrow signatures often look like other valid expressions.
+            // For instance:
+            //  - "(x = 10)" is an assignment expression parsed as a signature with a default parameter value.
+            //  - "(x,y)" is a comma expression parsed as a signature with two parameters.
+            //  - "a ? (b): c" will have "(b):" parsed as a signature with a return type annotation.
+            //
+            // So we need just a bit of lookahead to ensure that it can only be a signature.
+            if (!allowAmbiguity && token !== 34 /* EqualsGreaterThanToken */ && token !== 15 /* OpenBraceToken */) {
+                // Returning undefined here will cause our caller to rewind to where we started from.
+                return undefined;
+            }
+            return node;
+        }
+        function parseArrowFunctionExpressionBody(isAsync) {
+            if (token === 15 /* OpenBraceToken */) {
+                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
+            }
+            if (token !== 23 /* SemicolonToken */ &&
+                token !== 87 /* FunctionKeyword */ &&
+                token !== 73 /* ClassKeyword */ &&
+                isStartOfStatement() &&
+                !isStartOfExpressionStatement()) {
+                // Check if we got a plain statement (i.e. no expression-statements, no function/class expressions/declarations)
+                //
+                // Here we try to recover from a potential error situation in the case where the
+                // user meant to supply a block. For example, if the user wrote:
+                //
+                //  a =>
+                //      let v = 0;
+                //  }
+                //
+                // they may be missing an open brace.  Check to see if that's the case so we can
+                // try to recover better.  If we don't do this, then the next close curly we see may end
+                // up preemptively closing the containing construct.
+                //
+                // Note: even when 'ignoreMissingOpenBrace' is passed as true, parseBody will still error.
+                return parseFunctionBlock(/*allowYield*/ false, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ true);
+            }
+            return isAsync
+                ? doInAwaitContext(parseAssignmentExpressionOrHigher)
+                : doOutsideOfAwaitContext(parseAssignmentExpressionOrHigher);
+        }
+        function parseConditionalExpressionRest(leftOperand) {
+            // Note: we are passed in an expression which was produced from parseBinaryExpressionOrHigher.
+            var questionToken = parseOptionalToken(53 /* QuestionToken */);
+            if (!questionToken) {
+                return leftOperand;
+            }
+            // Note: we explicitly 'allowIn' in the whenTrue part of the condition expression, and
+            // we do not that for the 'whenFalse' part.
+            var node = createNode(188 /* ConditionalExpression */, leftOperand.pos);
+            node.condition = leftOperand;
+            node.questionToken = questionToken;
+            node.whenTrue = doOutsideOfContext(disallowInAndDecoratorContext, parseAssignmentExpressionOrHigher);
+            node.colonToken = parseExpectedToken(54 /* ColonToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics._0_expected, ts.tokenToString(54 /* ColonToken */));
+            node.whenFalse = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
+        }
+        function parseBinaryExpressionOrHigher(precedence) {
+            var leftOperand = parseUnaryExpressionOrHigher();
+            return parseBinaryExpressionRest(precedence, leftOperand);
+        }
+        function isInOrOfKeyword(t) {
+            return t === 90 /* InKeyword */ || t === 138 /* OfKeyword */;
+        }
+        function parseBinaryExpressionRest(precedence, leftOperand) {
+            while (true) {
+                // We either have a binary operator here, or we're finished.  We call
+                // reScanGreaterToken so that we merge token sequences like > and = into >=
+                reScanGreaterToken();
+                var newPrecedence = getBinaryOperatorPrecedence();
+                // Check the precedence to see if we should "take" this operator
+                // - For left associative operator (all operator but **), consume the operator,
+                //   recursively call the function below, and parse binaryExpression as a rightOperand
+                //   of the caller if the new precedence of the operator is greater then or equal to the current precedence.
+                //   For example:
+                //      a - b - c;
+                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
+                //      a * b - c
+                //            ^token; leftOperand = b. Return b to the caller as a rightOperand
+                //      a - b * c;
+                //            ^token; leftOperand = b. Return b * c to the caller as a rightOperand
+                // - For right associative operator (**), consume the operator, recursively call the function
+                //   and parse binaryExpression as a rightOperand of the caller if the new precedence of
+                //   the operator is strictly grater than the current precedence
+                //   For example:
+                //      a ** b ** c;
+                //             ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
+                //      a - b ** c;
+                //            ^^token; leftOperand = b. Return b ** c to the caller as a rightOperand
+                //      a ** b - c
+                //             ^token; leftOperand = b. Return b to the caller as a rightOperand
+                var consumeCurrentOperator = token === 38 /* AsteriskAsteriskToken */ ?
+                    newPrecedence >= precedence :
+                    newPrecedence > precedence;
+                if (!consumeCurrentOperator) {
+                    break;
+                }
+                if (token === 90 /* InKeyword */ && inDisallowInContext()) {
+                    break;
+                }
+                if (token === 116 /* AsKeyword */) {
+                    // Make sure we *do* perform ASI for constructs like this:
+                    //    var x = foo
+                    //    as (Bar)
+                    // This should be parsed as an initialized variable, followed
+                    // by a function call to 'as' with the argument 'Bar'
+                    if (scanner.hasPrecedingLineBreak()) {
+                        break;
+                    }
+                    else {
+                        nextToken();
+                        leftOperand = makeAsExpression(leftOperand, parseType());
+                    }
+                }
+                else {
+                    leftOperand = makeBinaryExpression(leftOperand, parseTokenNode(), parseBinaryExpressionOrHigher(newPrecedence));
+                }
+            }
+            return leftOperand;
+        }
+        function isBinaryOperator() {
+            if (inDisallowInContext() && token === 90 /* InKeyword */) {
+                return false;
+            }
+            return getBinaryOperatorPrecedence() > 0;
+        }
+        function getBinaryOperatorPrecedence() {
+            switch (token) {
+                case 52 /* BarBarToken */:
+                    return 1;
+                case 51 /* AmpersandAmpersandToken */:
+                    return 2;
+                case 47 /* BarToken */:
+                    return 3;
+                case 48 /* CaretToken */:
+                    return 4;
+                case 46 /* AmpersandToken */:
+                    return 5;
+                case 30 /* EqualsEqualsToken */:
+                case 31 /* ExclamationEqualsToken */:
+                case 32 /* EqualsEqualsEqualsToken */:
+                case 33 /* ExclamationEqualsEqualsToken */:
+                    return 6;
+                case 25 /* LessThanToken */:
+                case 27 /* GreaterThanToken */:
+                case 28 /* LessThanEqualsToken */:
+                case 29 /* GreaterThanEqualsToken */:
+                case 91 /* InstanceOfKeyword */:
+                case 90 /* InKeyword */:
+                case 116 /* AsKeyword */:
+                    return 7;
+                case 43 /* LessThanLessThanToken */:
+                case 44 /* GreaterThanGreaterThanToken */:
+                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
+                    return 8;
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                    return 9;
+                case 37 /* AsteriskToken */:
+                case 39 /* SlashToken */:
+                case 40 /* PercentToken */:
+                    return 10;
+                case 38 /* AsteriskAsteriskToken */:
+                    return 11;
+            }
+            // -1 is lower than all other precedences.  Returning it will cause binary expression
+            // parsing to stop.
+            return -1;
+        }
+        function makeBinaryExpression(left, operatorToken, right) {
+            var node = createNode(187 /* BinaryExpression */, left.pos);
+            node.left = left;
+            node.operatorToken = operatorToken;
+            node.right = right;
+            return finishNode(node);
+        }
+        function makeAsExpression(left, right) {
+            var node = createNode(195 /* AsExpression */, left.pos);
+            node.expression = left;
+            node.type = right;
+            return finishNode(node);
+        }
+        function parsePrefixUnaryExpression() {
+            var node = createNode(185 /* PrefixUnaryExpression */);
+            node.operator = token;
+            nextToken();
+            node.operand = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseDeleteExpression() {
+            var node = createNode(181 /* DeleteExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseTypeOfExpression() {
+            var node = createNode(182 /* TypeOfExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseVoidExpression() {
+            var node = createNode(183 /* VoidExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function isAwaitExpression() {
+            if (token === 119 /* AwaitKeyword */) {
+                if (inAwaitContext()) {
+                    return true;
+                }
+                // here we are using similar heuristics as 'isYieldExpression'
+                return lookAhead(nextTokenIsIdentifierOnSameLine);
+            }
+            return false;
+        }
+        function parseAwaitExpression() {
+            var node = createNode(184 /* AwaitExpression */);
+            nextToken();
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        /**
+         * Parse ES7 unary expression and await expression
+         *
+         * ES7 UnaryExpression:
+         *      1) SimpleUnaryExpression[?yield]
+         *      2) IncrementExpression[?yield] ** UnaryExpression[?yield]
+         */
+        function parseUnaryExpressionOrHigher() {
+            if (isAwaitExpression()) {
+                return parseAwaitExpression();
+            }
+            if (isIncrementExpression()) {
+                var incrementExpression = parseIncrementExpression();
+                return token === 38 /* AsteriskAsteriskToken */ ?
+                    parseBinaryExpressionRest(getBinaryOperatorPrecedence(), incrementExpression) :
+                    incrementExpression;
+            }
+            var unaryOperator = token;
+            var simpleUnaryExpression = parseSimpleUnaryExpression();
+            if (token === 38 /* AsteriskAsteriskToken */) {
+                var start = ts.skipTrivia(sourceText, simpleUnaryExpression.pos);
+                if (simpleUnaryExpression.kind === 177 /* TypeAssertionExpression */) {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.A_type_assertion_expression_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses);
+                }
+                else {
+                    parseErrorAtPosition(start, simpleUnaryExpression.end - start, ts.Diagnostics.An_unary_expression_with_the_0_operator_is_not_allowed_in_the_left_hand_side_of_an_exponentiation_expression_Consider_enclosing_the_expression_in_parentheses, ts.tokenToString(unaryOperator));
+                }
+            }
+            return simpleUnaryExpression;
+        }
+        /**
+         * Parse ES7 simple-unary expression or higher:
+         *
+         * ES7 SimpleUnaryExpression:
+         *      1) IncrementExpression[?yield]
+         *      2) delete UnaryExpression[?yield]
+         *      3) void UnaryExpression[?yield]
+         *      4) typeof UnaryExpression[?yield]
+         *      5) + UnaryExpression[?yield]
+         *      6) - UnaryExpression[?yield]
+         *      7) ~ UnaryExpression[?yield]
+         *      8) ! UnaryExpression[?yield]
+         */
+        function parseSimpleUnaryExpression() {
+            switch (token) {
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                case 50 /* TildeToken */:
+                case 49 /* ExclamationToken */:
+                    return parsePrefixUnaryExpression();
+                case 78 /* DeleteKeyword */:
+                    return parseDeleteExpression();
+                case 101 /* TypeOfKeyword */:
+                    return parseTypeOfExpression();
+                case 103 /* VoidKeyword */:
+                    return parseVoidExpression();
+                case 25 /* LessThanToken */:
+                    // This is modified UnaryExpression grammar in TypeScript
+                    //  UnaryExpression (modified):
+                    //      < type > UnaryExpression
+                    return parseTypeAssertion();
+                default:
+                    return parseIncrementExpression();
+            }
+        }
+        /**
+         * Check if the current token can possibly be an ES7 increment expression.
+         *
+         * ES7 IncrementExpression:
+         *      LeftHandSideExpression[?Yield]
+         *      LeftHandSideExpression[?Yield][no LineTerminator here]++
+         *      LeftHandSideExpression[?Yield][no LineTerminator here]--
+         *      ++LeftHandSideExpression[?Yield]
+         *      --LeftHandSideExpression[?Yield]
+         */
+        function isIncrementExpression() {
+            // This function is called inside parseUnaryExpression to decide
+            // whether to call parseSimpleUnaryExpression or call parseIncrementExpression directly
+            switch (token) {
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                case 50 /* TildeToken */:
+                case 49 /* ExclamationToken */:
+                case 78 /* DeleteKeyword */:
+                case 101 /* TypeOfKeyword */:
+                case 103 /* VoidKeyword */:
+                    return false;
+                case 25 /* LessThanToken */:
+                    // If we are not in JSX context, we are parsing TypeAssertion which is an UnaryExpression
+                    if (sourceFile.languageVariant !== 1 /* JSX */) {
+                        return false;
+                    }
+                // We are in JSX context and the token is part of JSXElement.
+                // Fall through
+                default:
+                    return true;
+            }
+        }
+        /**
+         * Parse ES7 IncrementExpression. IncrementExpression is used instead of ES6's PostFixExpression.
+         *
+         * ES7 IncrementExpression[yield]:
+         *      1) LeftHandSideExpression[?yield]
+         *      2) LeftHandSideExpression[?yield] [[no LineTerminator here]]++
+         *      3) LeftHandSideExpression[?yield] [[no LineTerminator here]]--
+         *      4) ++LeftHandSideExpression[?yield]
+         *      5) --LeftHandSideExpression[?yield]
+         * In TypeScript (2), (3) are parsed as PostfixUnaryExpression. (4), (5) are parsed as PrefixUnaryExpression
+         */
+        function parseIncrementExpression() {
+            if (token === 41 /* PlusPlusToken */ || token === 42 /* MinusMinusToken */) {
+                var node = createNode(185 /* PrefixUnaryExpression */);
+                node.operator = token;
+                nextToken();
+                node.operand = parseLeftHandSideExpressionOrHigher();
+                return finishNode(node);
+            }
+            else if (sourceFile.languageVariant === 1 /* JSX */ && token === 25 /* LessThanToken */ && lookAhead(nextTokenIsIdentifierOrKeyword)) {
+                // JSXElement is part of primaryExpression
+                return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true);
+            }
+            var expression = parseLeftHandSideExpressionOrHigher();
+            ts.Debug.assert(ts.isLeftHandSideExpression(expression));
+            if ((token === 41 /* PlusPlusToken */ || token === 42 /* MinusMinusToken */) && !scanner.hasPrecedingLineBreak()) {
+                var node = createNode(186 /* PostfixUnaryExpression */, expression.pos);
+                node.operand = expression;
+                node.operator = token;
+                nextToken();
+                return finishNode(node);
+            }
+            return expression;
+        }
+        function parseLeftHandSideExpressionOrHigher() {
+            // Original Ecma:
+            // LeftHandSideExpression: See 11.2
+            //      NewExpression
+            //      CallExpression
+            //
+            // Our simplification:
+            //
+            // LeftHandSideExpression: See 11.2
+            //      MemberExpression
+            //      CallExpression
+            //
+            // See comment in parseMemberExpressionOrHigher on how we replaced NewExpression with
+            // MemberExpression to make our lives easier.
+            //
+            // to best understand the below code, it's important to see how CallExpression expands
+            // out into its own productions:
+            //
+            // CallExpression:
+            //      MemberExpression Arguments
+            //      CallExpression Arguments
+            //      CallExpression[Expression]
+            //      CallExpression.IdentifierName
+            //      super   (   ArgumentListopt   )
+            //      super.IdentifierName
+            //
+            // Because of the recursion in these calls, we need to bottom out first.  There are two
+            // bottom out states we can run into.  Either we see 'super' which must start either of
+            // the last two CallExpression productions.  Or we have a MemberExpression which either
+            // completes the LeftHandSideExpression, or starts the beginning of the first four
+            // CallExpression productions.
+            var expression = token === 95 /* SuperKeyword */
+                ? parseSuperExpression()
+                : parseMemberExpressionOrHigher();
+            // Now, we *may* be complete.  However, we might have consumed the start of a
+            // CallExpression.  As such, we need to consume the rest of it here to be complete.
+            return parseCallExpressionRest(expression);
+        }
+        function parseMemberExpressionOrHigher() {
+            // Note: to make our lives simpler, we decompose the the NewExpression productions and
+            // place ObjectCreationExpression and FunctionExpression into PrimaryExpression.
+            // like so:
+            //
+            //   PrimaryExpression : See 11.1
+            //      this
+            //      Identifier
+            //      Literal
+            //      ArrayLiteral
+            //      ObjectLiteral
+            //      (Expression)
+            //      FunctionExpression
+            //      new MemberExpression Arguments?
+            //
+            //   MemberExpression : See 11.2
+            //      PrimaryExpression
+            //      MemberExpression[Expression]
+            //      MemberExpression.IdentifierName
+            //
+            //   CallExpression : See 11.2
+            //      MemberExpression
+            //      CallExpression Arguments
+            //      CallExpression[Expression]
+            //      CallExpression.IdentifierName
+            //
+            // Technically this is ambiguous.  i.e. CallExpression defines:
+            //
+            //   CallExpression:
+            //      CallExpression Arguments
+            //
+            // If you see: "new Foo()"
+            //
+            // Then that could be treated as a single ObjectCreationExpression, or it could be
+            // treated as the invocation of "new Foo".  We disambiguate that in code (to match
+            // the original grammar) by making sure that if we see an ObjectCreationExpression
+            // we always consume arguments if they are there. So we treat "new Foo()" as an
+            // object creation only, and not at all as an invocation)  Another way to think
+            // about this is that for every "new" that we see, we will consume an argument list if
+            // it is there as part of the *associated* object creation node.  Any additional
+            // argument lists we see, will become invocation expressions.
+            //
+            // Because there are no other places in the grammar now that refer to FunctionExpression
+            // or ObjectCreationExpression, it is safe to push down into the PrimaryExpression
+            // production.
+            //
+            // Because CallExpression and MemberExpression are left recursive, we need to bottom out
+            // of the recursion immediately.  So we parse out a primary expression to start with.
+            var expression = parsePrimaryExpression();
+            return parseMemberExpressionRest(expression);
+        }
+        function parseSuperExpression() {
+            var expression = parseTokenNode();
+            if (token === 17 /* OpenParenToken */ || token === 21 /* DotToken */ || token === 19 /* OpenBracketToken */) {
+                return expression;
+            }
+            // If we have seen "super" it must be followed by '(' or '.'.
+            // If it wasn't then just try to parse out a '.' and report an error.
+            var node = createNode(172 /* PropertyAccessExpression */, expression.pos);
+            node.expression = expression;
+            node.dotToken = parseExpectedToken(21 /* DotToken */, /*reportAtCurrentPosition*/ false, ts.Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
+            node.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
+            return finishNode(node);
+        }
+        function tagNamesAreEquivalent(lhs, rhs) {
+            if (lhs.kind !== rhs.kind) {
+                return false;
+            }
+            if (lhs.kind === 69 /* Identifier */) {
+                return lhs.text === rhs.text;
+            }
+            return lhs.right.text === rhs.right.text &&
+                tagNamesAreEquivalent(lhs.left, rhs.left);
+        }
+        function parseJsxElementOrSelfClosingElement(inExpressionContext) {
+            var opening = parseJsxOpeningOrSelfClosingElement(inExpressionContext);
+            var result;
+            if (opening.kind === 243 /* JsxOpeningElement */) {
+                var node = createNode(241 /* JsxElement */, opening.pos);
+                node.openingElement = opening;
+                node.children = parseJsxChildren(node.openingElement.tagName);
+                node.closingElement = parseJsxClosingElement(inExpressionContext);
+                if (!tagNamesAreEquivalent(node.openingElement.tagName, node.closingElement.tagName)) {
+                    parseErrorAtPosition(node.closingElement.pos, node.closingElement.end - node.closingElement.pos, ts.Diagnostics.Expected_corresponding_JSX_closing_tag_for_0, ts.getTextOfNodeFromSourceText(sourceText, node.openingElement.tagName));
+                }
+                result = finishNode(node);
+            }
+            else {
+                ts.Debug.assert(opening.kind === 242 /* JsxSelfClosingElement */);
+                // Nothing else to do for self-closing elements
+                result = opening;
+            }
+            // If the user writes the invalid code '<div></div><div></div>' in an expression context (i.e. not wrapped in
+            // an enclosing tag), we'll naively try to parse   ^ this as a 'less than' operator and the remainder of the tag
+            // as garbage, which will cause the formatter to badly mangle the JSX. Perform a speculative parse of a JSX
+            // element if we see a < token so that we can wrap it in a synthetic binary expression so the formatter
+            // does less damage and we can report a better error.
+            // Since JSX elements are invalid < operands anyway, this lookahead parse will only occur in error scenarios
+            // of one sort or another.
+            if (inExpressionContext && token === 25 /* LessThanToken */) {
+                var invalidElement = tryParse(function () { return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ true); });
+                if (invalidElement) {
+                    parseErrorAtCurrentToken(ts.Diagnostics.JSX_expressions_must_have_one_parent_element);
+                    var badNode = createNode(187 /* BinaryExpression */, result.pos);
+                    badNode.end = invalidElement.end;
+                    badNode.left = result;
+                    badNode.right = invalidElement;
+                    badNode.operatorToken = createMissingNode(24 /* CommaToken */, /*reportAtCurrentPosition*/ false, /*diagnosticMessage*/ undefined);
+                    badNode.operatorToken.pos = badNode.operatorToken.end = badNode.right.pos;
+                    return badNode;
+                }
+            }
+            return result;
+        }
+        function parseJsxText() {
+            var node = createNode(244 /* JsxText */, scanner.getStartPos());
+            token = scanner.scanJsxToken();
+            return finishNode(node);
+        }
+        function parseJsxChild() {
+            switch (token) {
+                case 244 /* JsxText */:
+                    return parseJsxText();
+                case 15 /* OpenBraceToken */:
+                    return parseJsxExpression(/*inExpressionContext*/ false);
+                case 25 /* LessThanToken */:
+                    return parseJsxElementOrSelfClosingElement(/*inExpressionContext*/ false);
+            }
+            ts.Debug.fail("Unknown JSX child kind " + token);
+        }
+        function parseJsxChildren(openingTagName) {
+            var result = [];
+            result.pos = scanner.getStartPos();
+            var saveParsingContext = parsingContext;
+            parsingContext |= 1 << 14 /* JsxChildren */;
+            while (true) {
+                token = scanner.reScanJsxToken();
+                if (token === 26 /* LessThanSlashToken */) {
+                    // Closing tag
+                    break;
+                }
+                else if (token === 1 /* EndOfFileToken */) {
+                    // If we hit EOF, issue the error at the tag that lacks the closing element
+                    // rather than at the end of the file (which is useless)
+                    parseErrorAtPosition(openingTagName.pos, openingTagName.end - openingTagName.pos, ts.Diagnostics.JSX_element_0_has_no_corresponding_closing_tag, ts.getTextOfNodeFromSourceText(sourceText, openingTagName));
+                    break;
+                }
+                result.push(parseJsxChild());
+            }
+            result.end = scanner.getTokenPos();
+            parsingContext = saveParsingContext;
+            return result;
+        }
+        function parseJsxOpeningOrSelfClosingElement(inExpressionContext) {
+            var fullStart = scanner.getStartPos();
+            parseExpected(25 /* LessThanToken */);
+            var tagName = parseJsxElementName();
+            var attributes = parseList(13 /* JsxAttributes */, parseJsxAttribute);
+            var node;
+            if (token === 27 /* GreaterThanToken */) {
+                // Closing tag, so scan the immediately-following text with the JSX scanning instead
+                // of regular scanning to avoid treating illegal characters (e.g. '#') as immediate
+                // scanning errors
+                node = createNode(243 /* JsxOpeningElement */, fullStart);
+                scanJsxText();
+            }
+            else {
+                parseExpected(39 /* SlashToken */);
+                if (inExpressionContext) {
+                    parseExpected(27 /* GreaterThanToken */);
+                }
+                else {
+                    parseExpected(27 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
+                    scanJsxText();
+                }
+                node = createNode(242 /* JsxSelfClosingElement */, fullStart);
+            }
+            node.tagName = tagName;
+            node.attributes = attributes;
+            return finishNode(node);
+        }
+        function parseJsxElementName() {
+            scanJsxIdentifier();
+            var elementName = parseIdentifierName();
+            while (parseOptional(21 /* DotToken */)) {
+                scanJsxIdentifier();
+                var node = createNode(139 /* QualifiedName */, elementName.pos); // !!!
+                node.left = elementName;
+                node.right = parseIdentifierName();
+                elementName = finishNode(node);
+            }
+            return elementName;
+        }
+        function parseJsxExpression(inExpressionContext) {
+            var node = createNode(248 /* JsxExpression */);
+            parseExpected(15 /* OpenBraceToken */);
+            if (token !== 16 /* CloseBraceToken */) {
+                node.expression = parseAssignmentExpressionOrHigher();
+            }
+            if (inExpressionContext) {
+                parseExpected(16 /* CloseBraceToken */);
+            }
+            else {
+                parseExpected(16 /* CloseBraceToken */, /*message*/ undefined, /*shouldAdvance*/ false);
+                scanJsxText();
+            }
+            return finishNode(node);
+        }
+        function parseJsxAttribute() {
+            if (token === 15 /* OpenBraceToken */) {
+                return parseJsxSpreadAttribute();
+            }
+            scanJsxIdentifier();
+            var node = createNode(246 /* JsxAttribute */);
+            node.name = parseIdentifierName();
+            if (parseOptional(56 /* EqualsToken */)) {
+                switch (token) {
+                    case 9 /* StringLiteral */:
+                        node.initializer = parseLiteralNode();
+                        break;
+                    default:
+                        node.initializer = parseJsxExpression(/*inExpressionContext*/ true);
+                        break;
+                }
+            }
+            return finishNode(node);
+        }
+        function parseJsxSpreadAttribute() {
+            var node = createNode(247 /* JsxSpreadAttribute */);
+            parseExpected(15 /* OpenBraceToken */);
+            parseExpected(22 /* DotDotDotToken */);
+            node.expression = parseExpression();
+            parseExpected(16 /* CloseBraceToken */);
+            return finishNode(node);
+        }
+        function parseJsxClosingElement(inExpressionContext) {
+            var node = createNode(245 /* JsxClosingElement */);
+            parseExpected(26 /* LessThanSlashToken */);
+            node.tagName = parseJsxElementName();
+            if (inExpressionContext) {
+                parseExpected(27 /* GreaterThanToken */);
+            }
+            else {
+                parseExpected(27 /* GreaterThanToken */, /*diagnostic*/ undefined, /*shouldAdvance*/ false);
+                scanJsxText();
+            }
+            return finishNode(node);
+        }
+        function parseTypeAssertion() {
+            var node = createNode(177 /* TypeAssertionExpression */);
+            parseExpected(25 /* LessThanToken */);
+            node.type = parseType();
+            parseExpected(27 /* GreaterThanToken */);
+            node.expression = parseSimpleUnaryExpression();
+            return finishNode(node);
+        }
+        function parseMemberExpressionRest(expression) {
+            while (true) {
+                var dotToken = parseOptionalToken(21 /* DotToken */);
+                if (dotToken) {
+                    var propertyAccess = createNode(172 /* PropertyAccessExpression */, expression.pos);
+                    propertyAccess.expression = expression;
+                    propertyAccess.dotToken = dotToken;
+                    propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
+                    expression = finishNode(propertyAccess);
+                    continue;
+                }
+                if (token === 49 /* ExclamationToken */ && !scanner.hasPrecedingLineBreak()) {
+                    nextToken();
+                    var nonNullExpression = createNode(196 /* NonNullExpression */, expression.pos);
+                    nonNullExpression.expression = expression;
+                    expression = finishNode(nonNullExpression);
+                    continue;
+                }
+                // when in the [Decorator] context, we do not parse ElementAccess as it could be part of a ComputedPropertyName
+                if (!inDecoratorContext() && parseOptional(19 /* OpenBracketToken */)) {
+                    var indexedAccess = createNode(173 /* ElementAccessExpression */, expression.pos);
+                    indexedAccess.expression = expression;
+                    // It's not uncommon for a user to write: "new Type[]".
+                    // Check for that common pattern and report a better error message.
+                    if (token !== 20 /* CloseBracketToken */) {
+                        indexedAccess.argumentExpression = allowInAnd(parseExpression);
+                        if (indexedAccess.argumentExpression.kind === 9 /* StringLiteral */ || indexedAccess.argumentExpression.kind === 8 /* NumericLiteral */) {
+                            var literal = indexedAccess.argumentExpression;
+                            literal.text = internIdentifier(literal.text);
+                        }
+                    }
+                    parseExpected(20 /* CloseBracketToken */);
+                    expression = finishNode(indexedAccess);
+                    continue;
+                }
+                if (token === 11 /* NoSubstitutionTemplateLiteral */ || token === 12 /* TemplateHead */) {
+                    var tagExpression = createNode(176 /* TaggedTemplateExpression */, expression.pos);
+                    tagExpression.tag = expression;
+                    tagExpression.template = token === 11 /* NoSubstitutionTemplateLiteral */
+                        ? parseLiteralNode()
+                        : parseTemplateExpression();
+                    expression = finishNode(tagExpression);
+                    continue;
+                }
+                return expression;
+            }
+        }
+        function parseCallExpressionRest(expression) {
+            while (true) {
+                expression = parseMemberExpressionRest(expression);
+                if (token === 25 /* LessThanToken */) {
+                    // See if this is the start of a generic invocation.  If so, consume it and
+                    // keep checking for postfix expressions.  Otherwise, it's just a '<' that's
+                    // part of an arithmetic expression.  Break out so we consume it higher in the
+                    // stack.
+                    var typeArguments = tryParse(parseTypeArgumentsInExpression);
+                    if (!typeArguments) {
+                        return expression;
+                    }
+                    var callExpr = createNode(174 /* CallExpression */, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.typeArguments = typeArguments;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                else if (token === 17 /* OpenParenToken */) {
+                    var callExpr = createNode(174 /* CallExpression */, expression.pos);
+                    callExpr.expression = expression;
+                    callExpr.arguments = parseArgumentList();
+                    expression = finishNode(callExpr);
+                    continue;
+                }
+                return expression;
+            }
+        }
+        function parseArgumentList() {
+            parseExpected(17 /* OpenParenToken */);
+            var result = parseDelimitedList(11 /* ArgumentExpressions */, parseArgumentExpression);
+            parseExpected(18 /* CloseParenToken */);
+            return result;
+        }
+        function parseTypeArgumentsInExpression() {
+            if (!parseOptional(25 /* LessThanToken */)) {
+                return undefined;
+            }
+            var typeArguments = parseDelimitedList(18 /* TypeArguments */, parseType);
+            if (!parseExpected(27 /* GreaterThanToken */)) {
+                // If it doesn't have the closing >  then it's definitely not an type argument list.
+                return undefined;
+            }
+            // If we have a '<', then only parse this as a argument list if the type arguments
+            // are complete and we have an open paren.  if we don't, rewind and return nothing.
+            return typeArguments && canFollowTypeArgumentsInExpression()
+                ? typeArguments
+                : undefined;
+        }
+        function canFollowTypeArgumentsInExpression() {
+            switch (token) {
+                case 17 /* OpenParenToken */: // foo<x>(
+                // this case are the only case where this token can legally follow a type argument
+                // list.  So we definitely want to treat this as a type arg list.
+                case 21 /* DotToken */: // foo<x>.
+                case 18 /* CloseParenToken */: // foo<x>)
+                case 20 /* CloseBracketToken */: // foo<x>]
+                case 54 /* ColonToken */: // foo<x>:
+                case 23 /* SemicolonToken */: // foo<x>;
+                case 53 /* QuestionToken */: // foo<x>?
+                case 30 /* EqualsEqualsToken */: // foo<x> ==
+                case 32 /* EqualsEqualsEqualsToken */: // foo<x> ===
+                case 31 /* ExclamationEqualsToken */: // foo<x> !=
+                case 33 /* ExclamationEqualsEqualsToken */: // foo<x> !==
+                case 51 /* AmpersandAmpersandToken */: // foo<x> &&
+                case 52 /* BarBarToken */: // foo<x> ||
+                case 48 /* CaretToken */: // foo<x> ^
+                case 46 /* AmpersandToken */: // foo<x> &
+                case 47 /* BarToken */: // foo<x> |
+                case 16 /* CloseBraceToken */: // foo<x> }
+                case 1 /* EndOfFileToken */:
+                    // these cases can't legally follow a type arg list.  However, they're not legal
+                    // expressions either.  The user is probably in the middle of a generic type. So
+                    // treat it as such.
+                    return true;
+                case 24 /* CommaToken */: // foo<x>,
+                case 15 /* OpenBraceToken */: // foo<x> {
+                // We don't want to treat these as type arguments.  Otherwise we'll parse this
+                // as an invocation expression.  Instead, we want to parse out the expression
+                // in isolation from the type arguments.
+                default:
+                    // Anything else treat as an expression.
+                    return false;
+            }
+        }
+        function parsePrimaryExpression() {
+            switch (token) {
+                case 8 /* NumericLiteral */:
+                case 9 /* StringLiteral */:
+                case 11 /* NoSubstitutionTemplateLiteral */:
+                    return parseLiteralNode();
+                case 97 /* ThisKeyword */:
+                case 95 /* SuperKeyword */:
+                case 93 /* NullKeyword */:
+                case 99 /* TrueKeyword */:
+                case 84 /* FalseKeyword */:
+                    return parseTokenNode();
+                case 17 /* OpenParenToken */:
+                    return parseParenthesizedExpression();
+                case 19 /* OpenBracketToken */:
+                    return parseArrayLiteralExpression();
+                case 15 /* OpenBraceToken */:
+                    return parseObjectLiteralExpression();
+                case 118 /* AsyncKeyword */:
+                    // Async arrow functions are parsed earlier in parseAssignmentExpressionOrHigher.
+                    // If we encounter `async [no LineTerminator here] function` then this is an async
+                    // function; otherwise, its an identifier.
+                    if (!lookAhead(nextTokenIsFunctionKeywordOnSameLine)) {
+                        break;
+                    }
+                    return parseFunctionExpression();
+                case 73 /* ClassKeyword */:
+                    return parseClassExpression();
+                case 87 /* FunctionKeyword */:
+                    return parseFunctionExpression();
+                case 92 /* NewKeyword */:
+                    return parseNewExpression();
+                case 39 /* SlashToken */:
+                case 61 /* SlashEqualsToken */:
+                    if (reScanSlashToken() === 10 /* RegularExpressionLiteral */) {
+                        return parseLiteralNode();
+                    }
+                    break;
+                case 12 /* TemplateHead */:
+                    return parseTemplateExpression();
+            }
+            return parseIdentifier(ts.Diagnostics.Expression_expected);
+        }
+        function parseParenthesizedExpression() {
+            var node = createNode(178 /* ParenthesizedExpression */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18 /* CloseParenToken */);
+            return finishNode(node);
+        }
+        function parseSpreadElement() {
+            var node = createNode(191 /* SpreadElementExpression */);
+            parseExpected(22 /* DotDotDotToken */);
+            node.expression = parseAssignmentExpressionOrHigher();
+            return finishNode(node);
+        }
+        function parseArgumentOrArrayLiteralElement() {
+            return token === 22 /* DotDotDotToken */ ? parseSpreadElement() :
+                token === 24 /* CommaToken */ ? createNode(193 /* OmittedExpression */) :
+                    parseAssignmentExpressionOrHigher();
+        }
+        function parseArgumentExpression() {
+            return doOutsideOfContext(disallowInAndDecoratorContext, parseArgumentOrArrayLiteralElement);
+        }
+        function parseArrayLiteralExpression() {
+            var node = createNode(170 /* ArrayLiteralExpression */);
+            parseExpected(19 /* OpenBracketToken */);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.elements = parseDelimitedList(15 /* ArrayLiteralMembers */, parseArgumentOrArrayLiteralElement);
+            parseExpected(20 /* CloseBracketToken */);
+            return finishNode(node);
+        }
+        function tryParseAccessorDeclaration(fullStart, decorators, modifiers) {
+            if (parseContextualModifier(123 /* GetKeyword */)) {
+                return addJSDocComment(parseAccessorDeclaration(149 /* GetAccessor */, fullStart, decorators, modifiers));
+            }
+            else if (parseContextualModifier(131 /* SetKeyword */)) {
+                return parseAccessorDeclaration(150 /* SetAccessor */, fullStart, decorators, modifiers);
+            }
+            return undefined;
+        }
+        function parseObjectLiteralElement() {
+            var fullStart = scanner.getStartPos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
+            }
+            var asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            // Disallowing of optional property assignments happens in the grammar checker.
+            var questionToken = parseOptionalToken(53 /* QuestionToken */);
+            if (asteriskToken || token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, propertyName, questionToken);
+            }
+            // check if it is short-hand property assignment or normal property assignment
+            // NOTE: if token is EqualsToken it is interpreted as CoverInitializedName production
+            // CoverInitializedName[Yield] :
+            //     IdentifierReference[?Yield] Initializer[In, ?Yield]
+            // this is necessary because ObjectLiteral productions are also used to cover grammar for ObjectAssignmentPattern
+            var isShorthandPropertyAssignment = tokenIsIdentifier && (token === 24 /* CommaToken */ || token === 16 /* CloseBraceToken */ || token === 56 /* EqualsToken */);
+            if (isShorthandPropertyAssignment) {
+                var shorthandDeclaration = createNode(254 /* ShorthandPropertyAssignment */, fullStart);
+                shorthandDeclaration.name = propertyName;
+                shorthandDeclaration.questionToken = questionToken;
+                var equalsToken = parseOptionalToken(56 /* EqualsToken */);
+                if (equalsToken) {
+                    shorthandDeclaration.equalsToken = equalsToken;
+                    shorthandDeclaration.objectAssignmentInitializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                }
+                return addJSDocComment(finishNode(shorthandDeclaration));
+            }
+            else {
+                var propertyAssignment = createNode(253 /* PropertyAssignment */, fullStart);
+                propertyAssignment.modifiers = modifiers;
+                propertyAssignment.name = propertyName;
+                propertyAssignment.questionToken = questionToken;
+                parseExpected(54 /* ColonToken */);
+                propertyAssignment.initializer = allowInAnd(parseAssignmentExpressionOrHigher);
+                return addJSDocComment(finishNode(propertyAssignment));
+            }
+        }
+        function parseObjectLiteralExpression() {
+            var node = createNode(171 /* ObjectLiteralExpression */);
+            parseExpected(15 /* OpenBraceToken */);
+            if (scanner.hasPrecedingLineBreak()) {
+                node.multiLine = true;
+            }
+            node.properties = parseDelimitedList(12 /* ObjectLiteralMembers */, parseObjectLiteralElement, /*considerSemicolonAsDelimiter*/ true);
+            parseExpected(16 /* CloseBraceToken */);
+            return finishNode(node);
+        }
+        function parseFunctionExpression() {
+            // GeneratorExpression:
+            //      function* BindingIdentifier [Yield][opt](FormalParameters[Yield]){ GeneratorBody }
+            //
+            // FunctionExpression:
+            //      function BindingIdentifier[opt](FormalParameters){ FunctionBody }
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ false);
+            }
+            var node = createNode(179 /* FunctionExpression */);
+            setModifiers(node, parseModifiers());
+            parseExpected(87 /* FunctionKeyword */);
+            node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = !!(node.flags & 256 /* Async */);
+            node.name =
+                isGenerator && isAsync ? doInYieldAndAwaitContext(parseOptionalIdentifier) :
+                    isGenerator ? doInYieldContext(parseOptionalIdentifier) :
+                        isAsync ? doInAwaitContext(parseOptionalIdentifier) :
+                            parseOptionalIdentifier();
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlock(/*allowYield*/ isGenerator, /*allowAwait*/ isAsync, /*ignoreMissingOpenBrace*/ false);
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ true);
+            }
+            return addJSDocComment(finishNode(node));
+        }
+        function parseOptionalIdentifier() {
+            return isIdentifier() ? parseIdentifier() : undefined;
+        }
+        function parseNewExpression() {
+            var node = createNode(175 /* NewExpression */);
+            parseExpected(92 /* NewKeyword */);
+            node.expression = parseMemberExpressionOrHigher();
+            node.typeArguments = tryParse(parseTypeArgumentsInExpression);
+            if (node.typeArguments || token === 17 /* OpenParenToken */) {
+                node.arguments = parseArgumentList();
+            }
+            return finishNode(node);
+        }
+        // STATEMENTS
+        function parseBlock(ignoreMissingOpenBrace, diagnosticMessage) {
+            var node = createNode(199 /* Block */);
+            if (parseExpected(15 /* OpenBraceToken */, diagnosticMessage) || ignoreMissingOpenBrace) {
+                node.statements = parseList(1 /* BlockStatements */, parseStatement);
+                parseExpected(16 /* CloseBraceToken */);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseFunctionBlock(allowYield, allowAwait, ignoreMissingOpenBrace, diagnosticMessage) {
+            var savedYieldContext = inYieldContext();
+            setYieldContext(allowYield);
+            var savedAwaitContext = inAwaitContext();
+            setAwaitContext(allowAwait);
+            // We may be in a [Decorator] context when parsing a function expression or
+            // arrow function. The body of the function is not in [Decorator] context.
+            var saveDecoratorContext = inDecoratorContext();
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ false);
+            }
+            var block = parseBlock(ignoreMissingOpenBrace, diagnosticMessage);
+            if (saveDecoratorContext) {
+                setDecoratorContext(/*val*/ true);
+            }
+            setYieldContext(savedYieldContext);
+            setAwaitContext(savedAwaitContext);
+            return block;
+        }
+        function parseEmptyStatement() {
+            var node = createNode(201 /* EmptyStatement */);
+            parseExpected(23 /* SemicolonToken */);
+            return finishNode(node);
+        }
+        function parseIfStatement() {
+            var node = createNode(203 /* IfStatement */);
+            parseExpected(88 /* IfKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18 /* CloseParenToken */);
+            node.thenStatement = parseStatement();
+            node.elseStatement = parseOptional(80 /* ElseKeyword */) ? parseStatement() : undefined;
+            return finishNode(node);
+        }
+        function parseDoStatement() {
+            var node = createNode(204 /* DoStatement */);
+            parseExpected(79 /* DoKeyword */);
+            node.statement = parseStatement();
+            parseExpected(104 /* WhileKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18 /* CloseParenToken */);
+            // From: https://mail.mozilla.org/pipermail/es-discuss/2011-August/016188.html
+            // 157 min --- All allen at wirfs-brock.com CONF --- "do{;}while(false)false" prohibited in
+            // spec but allowed in consensus reality. Approved -- this is the de-facto standard whereby
+            //  do;while(0)x will have a semicolon inserted before x.
+            parseOptional(23 /* SemicolonToken */);
+            return finishNode(node);
+        }
+        function parseWhileStatement() {
+            var node = createNode(205 /* WhileStatement */);
+            parseExpected(104 /* WhileKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18 /* CloseParenToken */);
+            node.statement = parseStatement();
+            return finishNode(node);
+        }
+        function parseForOrForInOrForOfStatement() {
+            var pos = getNodePos();
+            parseExpected(86 /* ForKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            var initializer = undefined;
+            if (token !== 23 /* SemicolonToken */) {
+                if (token === 102 /* VarKeyword */ || token === 108 /* LetKeyword */ || token === 74 /* ConstKeyword */) {
+                    initializer = parseVariableDeclarationList(/*inForStatementInitializer*/ true);
+                }
+                else {
+                    initializer = disallowInAnd(parseExpression);
+                }
+            }
+            var forOrForInOrForOfStatement;
+            if (parseOptional(90 /* InKeyword */)) {
+                var forInStatement = createNode(207 /* ForInStatement */, pos);
+                forInStatement.initializer = initializer;
+                forInStatement.expression = allowInAnd(parseExpression);
+                parseExpected(18 /* CloseParenToken */);
+                forOrForInOrForOfStatement = forInStatement;
+            }
+            else if (parseOptional(138 /* OfKeyword */)) {
+                var forOfStatement = createNode(208 /* ForOfStatement */, pos);
+                forOfStatement.initializer = initializer;
+                forOfStatement.expression = allowInAnd(parseAssignmentExpressionOrHigher);
+                parseExpected(18 /* CloseParenToken */);
+                forOrForInOrForOfStatement = forOfStatement;
+            }
+            else {
+                var forStatement = createNode(206 /* ForStatement */, pos);
+                forStatement.initializer = initializer;
+                parseExpected(23 /* SemicolonToken */);
+                if (token !== 23 /* SemicolonToken */ && token !== 18 /* CloseParenToken */) {
+                    forStatement.condition = allowInAnd(parseExpression);
+                }
+                parseExpected(23 /* SemicolonToken */);
+                if (token !== 18 /* CloseParenToken */) {
+                    forStatement.incrementor = allowInAnd(parseExpression);
+                }
+                parseExpected(18 /* CloseParenToken */);
+                forOrForInOrForOfStatement = forStatement;
+            }
+            forOrForInOrForOfStatement.statement = parseStatement();
+            return finishNode(forOrForInOrForOfStatement);
+        }
+        function parseBreakOrContinueStatement(kind) {
+            var node = createNode(kind);
+            parseExpected(kind === 210 /* BreakStatement */ ? 70 /* BreakKeyword */ : 75 /* ContinueKeyword */);
+            if (!canParseSemicolon()) {
+                node.label = parseIdentifier();
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseReturnStatement() {
+            var node = createNode(211 /* ReturnStatement */);
+            parseExpected(94 /* ReturnKeyword */);
+            if (!canParseSemicolon()) {
+                node.expression = allowInAnd(parseExpression);
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseWithStatement() {
+            var node = createNode(212 /* WithStatement */);
+            parseExpected(105 /* WithKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18 /* CloseParenToken */);
+            node.statement = parseStatement();
+            return finishNode(node);
+        }
+        function parseCaseClause() {
+            var node = createNode(249 /* CaseClause */);
+            parseExpected(71 /* CaseKeyword */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(54 /* ColonToken */);
+            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
+            return finishNode(node);
+        }
+        function parseDefaultClause() {
+            var node = createNode(250 /* DefaultClause */);
+            parseExpected(77 /* DefaultKeyword */);
+            parseExpected(54 /* ColonToken */);
+            node.statements = parseList(3 /* SwitchClauseStatements */, parseStatement);
+            return finishNode(node);
+        }
+        function parseCaseOrDefaultClause() {
+            return token === 71 /* CaseKeyword */ ? parseCaseClause() : parseDefaultClause();
+        }
+        function parseSwitchStatement() {
+            var node = createNode(213 /* SwitchStatement */);
+            parseExpected(96 /* SwitchKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = allowInAnd(parseExpression);
+            parseExpected(18 /* CloseParenToken */);
+            var caseBlock = createNode(227 /* CaseBlock */, scanner.getStartPos());
+            parseExpected(15 /* OpenBraceToken */);
+            caseBlock.clauses = parseList(2 /* SwitchClauses */, parseCaseOrDefaultClause);
+            parseExpected(16 /* CloseBraceToken */);
+            node.caseBlock = finishNode(caseBlock);
+            return finishNode(node);
+        }
+        function parseThrowStatement() {
+            // ThrowStatement[Yield] :
+            //      throw [no LineTerminator here]Expression[In, ?Yield];
+            // Because of automatic semicolon insertion, we need to report error if this
+            // throw could be terminated with a semicolon.  Note: we can't call 'parseExpression'
+            // directly as that might consume an expression on the following line.
+            // We just return 'undefined' in that case.  The actual error will be reported in the
+            // grammar walker.
+            var node = createNode(215 /* ThrowStatement */);
+            parseExpected(98 /* ThrowKeyword */);
+            node.expression = scanner.hasPrecedingLineBreak() ? undefined : allowInAnd(parseExpression);
+            parseSemicolon();
+            return finishNode(node);
+        }
+        // TODO: Review for error recovery
+        function parseTryStatement() {
+            var node = createNode(216 /* TryStatement */);
+            parseExpected(100 /* TryKeyword */);
+            node.tryBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            node.catchClause = token === 72 /* CatchKeyword */ ? parseCatchClause() : undefined;
+            // If we don't have a catch clause, then we must have a finally clause.  Try to parse
+            // one out no matter what.
+            if (!node.catchClause || token === 85 /* FinallyKeyword */) {
+                parseExpected(85 /* FinallyKeyword */);
+                node.finallyBlock = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            }
+            return finishNode(node);
+        }
+        function parseCatchClause() {
+            var result = createNode(252 /* CatchClause */);
+            parseExpected(72 /* CatchKeyword */);
+            if (parseExpected(17 /* OpenParenToken */)) {
+                result.variableDeclaration = parseVariableDeclaration();
+            }
+            parseExpected(18 /* CloseParenToken */);
+            result.block = parseBlock(/*ignoreMissingOpenBrace*/ false);
+            return finishNode(result);
+        }
+        function parseDebuggerStatement() {
+            var node = createNode(217 /* DebuggerStatement */);
+            parseExpected(76 /* DebuggerKeyword */);
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseExpressionOrLabeledStatement() {
+            // Avoiding having to do the lookahead for a labeled statement by just trying to parse
+            // out an expression, seeing if it is identifier and then seeing if it is followed by
+            // a colon.
+            var fullStart = scanner.getStartPos();
+            var expression = allowInAnd(parseExpression);
+            if (expression.kind === 69 /* Identifier */ && parseOptional(54 /* ColonToken */)) {
+                var labeledStatement = createNode(214 /* LabeledStatement */, fullStart);
+                labeledStatement.label = expression;
+                labeledStatement.statement = parseStatement();
+                return addJSDocComment(finishNode(labeledStatement));
+            }
+            else {
+                var expressionStatement = createNode(202 /* ExpressionStatement */, fullStart);
+                expressionStatement.expression = expression;
+                parseSemicolon();
+                return addJSDocComment(finishNode(expressionStatement));
+            }
+        }
+        function nextTokenIsIdentifierOrKeywordOnSameLine() {
+            nextToken();
+            return ts.tokenIsIdentifierOrKeyword(token) && !scanner.hasPrecedingLineBreak();
+        }
+        function nextTokenIsFunctionKeywordOnSameLine() {
+            nextToken();
+            return token === 87 /* FunctionKeyword */ && !scanner.hasPrecedingLineBreak();
+        }
+        function nextTokenIsIdentifierOrKeywordOrNumberOnSameLine() {
+            nextToken();
+            return (ts.tokenIsIdentifierOrKeyword(token) || token === 8 /* NumericLiteral */) && !scanner.hasPrecedingLineBreak();
+        }
+        function isDeclaration() {
+            while (true) {
+                switch (token) {
+                    case 102 /* VarKeyword */:
+                    case 108 /* LetKeyword */:
+                    case 74 /* ConstKeyword */:
+                    case 87 /* FunctionKeyword */:
+                    case 73 /* ClassKeyword */:
+                    case 81 /* EnumKeyword */:
+                        return true;
+                    // 'declare', 'module', 'namespace', 'interface'* and 'type' are all legal JavaScript identifiers;
+                    // however, an identifier cannot be followed by another identifier on the same line. This is what we
+                    // count on to parse out the respective declarations. For instance, we exploit this to say that
+                    //
+                    //    namespace n
+                    //
+                    // can be none other than the beginning of a namespace declaration, but need to respect that JavaScript sees
+                    //
+                    //    namespace
+                    //    n
+                    //
+                    // as the identifier 'namespace' on one line followed by the identifier 'n' on another.
+                    // We need to look one token ahead to see if it permissible to try parsing a declaration.
+                    //
+                    // *Note*: 'interface' is actually a strict mode reserved word. So while
+                    //
+                    //   "use strict"
+                    //   interface
+                    //   I {}
+                    //
+                    // could be legal, it would add complexity for very little gain.
+                    case 107 /* InterfaceKeyword */:
+                    case 134 /* TypeKeyword */:
+                        return nextTokenIsIdentifierOnSameLine();
+                    case 125 /* ModuleKeyword */:
+                    case 126 /* NamespaceKeyword */:
+                        return nextTokenIsIdentifierOrStringLiteralOnSameLine();
+                    case 115 /* AbstractKeyword */:
+                    case 118 /* AsyncKeyword */:
+                    case 122 /* DeclareKeyword */:
+                    case 110 /* PrivateKeyword */:
+                    case 111 /* ProtectedKeyword */:
+                    case 112 /* PublicKeyword */:
+                    case 128 /* ReadonlyKeyword */:
+                        nextToken();
+                        // ASI takes effect for this modifier.
+                        if (scanner.hasPrecedingLineBreak()) {
+                            return false;
+                        }
+                        continue;
+                    case 137 /* GlobalKeyword */:
+                        nextToken();
+                        return token === 15 /* OpenBraceToken */ || token === 69 /* Identifier */ || token === 82 /* ExportKeyword */;
+                    case 89 /* ImportKeyword */:
+                        nextToken();
+                        return token === 9 /* StringLiteral */ || token === 37 /* AsteriskToken */ ||
+                            token === 15 /* OpenBraceToken */ || ts.tokenIsIdentifierOrKeyword(token);
+                    case 82 /* ExportKeyword */:
+                        nextToken();
+                        if (token === 56 /* EqualsToken */ || token === 37 /* AsteriskToken */ ||
+                            token === 15 /* OpenBraceToken */ || token === 77 /* DefaultKeyword */ ||
+                            token === 116 /* AsKeyword */) {
+                            return true;
+                        }
+                        continue;
+                    case 113 /* StaticKeyword */:
+                        nextToken();
+                        continue;
+                    default:
+                        return false;
+                }
+            }
+        }
+        function isStartOfDeclaration() {
+            return lookAhead(isDeclaration);
+        }
+        function isStartOfStatement() {
+            switch (token) {
+                case 55 /* AtToken */:
+                case 23 /* SemicolonToken */:
+                case 15 /* OpenBraceToken */:
+                case 102 /* VarKeyword */:
+                case 108 /* LetKeyword */:
+                case 87 /* FunctionKeyword */:
+                case 73 /* ClassKeyword */:
+                case 81 /* EnumKeyword */:
+                case 88 /* IfKeyword */:
+                case 79 /* DoKeyword */:
+                case 104 /* WhileKeyword */:
+                case 86 /* ForKeyword */:
+                case 75 /* ContinueKeyword */:
+                case 70 /* BreakKeyword */:
+                case 94 /* ReturnKeyword */:
+                case 105 /* WithKeyword */:
+                case 96 /* SwitchKeyword */:
+                case 98 /* ThrowKeyword */:
+                case 100 /* TryKeyword */:
+                case 76 /* DebuggerKeyword */:
+                // 'catch' and 'finally' do not actually indicate that the code is part of a statement,
+                // however, we say they are here so that we may gracefully parse them and error later.
+                case 72 /* CatchKeyword */:
+                case 85 /* FinallyKeyword */:
+                    return true;
+                case 74 /* ConstKeyword */:
+                case 82 /* ExportKeyword */:
+                case 89 /* ImportKeyword */:
+                    return isStartOfDeclaration();
+                case 118 /* AsyncKeyword */:
+                case 122 /* DeclareKeyword */:
+                case 107 /* InterfaceKeyword */:
+                case 125 /* ModuleKeyword */:
+                case 126 /* NamespaceKeyword */:
+                case 134 /* TypeKeyword */:
+                case 137 /* GlobalKeyword */:
+                    // When these don't start a declaration, they're an identifier in an expression statement
+                    return true;
+                case 112 /* PublicKeyword */:
+                case 110 /* PrivateKeyword */:
+                case 111 /* ProtectedKeyword */:
+                case 113 /* StaticKeyword */:
+                case 128 /* ReadonlyKeyword */:
+                    // When these don't start a declaration, they may be the start of a class member if an identifier
+                    // immediately follows. Otherwise they're an identifier in an expression statement.
+                    return isStartOfDeclaration() || !lookAhead(nextTokenIsIdentifierOrKeywordOnSameLine);
+                default:
+                    return isStartOfExpression();
+            }
+        }
+        function nextTokenIsIdentifierOrStartOfDestructuring() {
+            nextToken();
+            return isIdentifier() || token === 15 /* OpenBraceToken */ || token === 19 /* OpenBracketToken */;
+        }
+        function isLetDeclaration() {
+            // In ES6 'let' always starts a lexical declaration if followed by an identifier or {
+            // or [.
+            return lookAhead(nextTokenIsIdentifierOrStartOfDestructuring);
+        }
+        function parseStatement() {
+            switch (token) {
+                case 23 /* SemicolonToken */:
+                    return parseEmptyStatement();
+                case 15 /* OpenBraceToken */:
+                    return parseBlock(/*ignoreMissingOpenBrace*/ false);
+                case 102 /* VarKeyword */:
+                    return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                case 108 /* LetKeyword */:
+                    if (isLetDeclaration()) {
+                        return parseVariableStatement(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                    }
+                    break;
+                case 87 /* FunctionKeyword */:
+                    return parseFunctionDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                case 73 /* ClassKeyword */:
+                    return parseClassDeclaration(scanner.getStartPos(), /*decorators*/ undefined, /*modifiers*/ undefined);
+                case 88 /* IfKeyword */:
+                    return parseIfStatement();
+                case 79 /* DoKeyword */:
+                    return parseDoStatement();
+                case 104 /* WhileKeyword */:
+                    return parseWhileStatement();
+                case 86 /* ForKeyword */:
+                    return parseForOrForInOrForOfStatement();
+                case 75 /* ContinueKeyword */:
+                    return parseBreakOrContinueStatement(209 /* ContinueStatement */);
+                case 70 /* BreakKeyword */:
+                    return parseBreakOrContinueStatement(210 /* BreakStatement */);
+                case 94 /* ReturnKeyword */:
+                    return parseReturnStatement();
+                case 105 /* WithKeyword */:
+                    return parseWithStatement();
+                case 96 /* SwitchKeyword */:
+                    return parseSwitchStatement();
+                case 98 /* ThrowKeyword */:
+                    return parseThrowStatement();
+                case 100 /* TryKeyword */:
+                // Include 'catch' and 'finally' for error recovery.
+                case 72 /* CatchKeyword */:
+                case 85 /* FinallyKeyword */:
+                    return parseTryStatement();
+                case 76 /* DebuggerKeyword */:
+                    return parseDebuggerStatement();
+                case 55 /* AtToken */:
+                    return parseDeclaration();
+                case 118 /* AsyncKeyword */:
+                case 107 /* InterfaceKeyword */:
+                case 134 /* TypeKeyword */:
+                case 125 /* ModuleKeyword */:
+                case 126 /* NamespaceKeyword */:
+                case 122 /* DeclareKeyword */:
+                case 74 /* ConstKeyword */:
+                case 81 /* EnumKeyword */:
+                case 82 /* ExportKeyword */:
+                case 89 /* ImportKeyword */:
+                case 110 /* PrivateKeyword */:
+                case 111 /* ProtectedKeyword */:
+                case 112 /* PublicKeyword */:
+                case 115 /* AbstractKeyword */:
+                case 113 /* StaticKeyword */:
+                case 128 /* ReadonlyKeyword */:
+                case 137 /* GlobalKeyword */:
+                    if (isStartOfDeclaration()) {
+                        return parseDeclaration();
+                    }
+                    break;
+            }
+            return parseExpressionOrLabeledStatement();
+        }
+        function parseDeclaration() {
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers();
+            switch (token) {
+                case 102 /* VarKeyword */:
+                case 108 /* LetKeyword */:
+                case 74 /* ConstKeyword */:
+                    return parseVariableStatement(fullStart, decorators, modifiers);
+                case 87 /* FunctionKeyword */:
+                    return parseFunctionDeclaration(fullStart, decorators, modifiers);
+                case 73 /* ClassKeyword */:
+                    return parseClassDeclaration(fullStart, decorators, modifiers);
+                case 107 /* InterfaceKeyword */:
+                    return parseInterfaceDeclaration(fullStart, decorators, modifiers);
+                case 134 /* TypeKeyword */:
+                    return parseTypeAliasDeclaration(fullStart, decorators, modifiers);
+                case 81 /* EnumKeyword */:
+                    return parseEnumDeclaration(fullStart, decorators, modifiers);
+                case 137 /* GlobalKeyword */:
+                case 125 /* ModuleKeyword */:
+                case 126 /* NamespaceKeyword */:
+                    return parseModuleDeclaration(fullStart, decorators, modifiers);
+                case 89 /* ImportKeyword */:
+                    return parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers);
+                case 82 /* ExportKeyword */:
+                    nextToken();
+                    switch (token) {
+                        case 77 /* DefaultKeyword */:
+                        case 56 /* EqualsToken */:
+                            return parseExportAssignment(fullStart, decorators, modifiers);
+                        case 116 /* AsKeyword */:
+                            return parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers);
+                        default:
+                            return parseExportDeclaration(fullStart, decorators, modifiers);
+                    }
+                default:
+                    if (decorators || modifiers) {
+                        // We reached this point because we encountered decorators and/or modifiers and assumed a declaration
+                        // would follow. For recovery and error reporting purposes, return an incomplete declaration.
+                        var node = createMissingNode(239 /* MissingDeclaration */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
+                        node.pos = fullStart;
+                        node.decorators = decorators;
+                        setModifiers(node, modifiers);
+                        return finishNode(node);
+                    }
+            }
+        }
+        function nextTokenIsIdentifierOrStringLiteralOnSameLine() {
+            nextToken();
+            return !scanner.hasPrecedingLineBreak() && (isIdentifier() || token === 9 /* StringLiteral */);
+        }
+        function parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage) {
+            if (token !== 15 /* OpenBraceToken */ && canParseSemicolon()) {
+                parseSemicolon();
+                return;
+            }
+            return parseFunctionBlock(isGenerator, isAsync, /*ignoreMissingOpenBrace*/ false, diagnosticMessage);
+        }
+        // DECLARATIONS
+        function parseArrayBindingElement() {
+            if (token === 24 /* CommaToken */) {
+                return createNode(193 /* OmittedExpression */);
+            }
+            var node = createNode(169 /* BindingElement */);
+            node.dotDotDotToken = parseOptionalToken(22 /* DotDotDotToken */);
+            node.name = parseIdentifierOrPattern();
+            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
+            return finishNode(node);
+        }
+        function parseObjectBindingElement() {
+            var node = createNode(169 /* BindingElement */);
+            var tokenIsIdentifier = isIdentifier();
+            var propertyName = parsePropertyName();
+            if (tokenIsIdentifier && token !== 54 /* ColonToken */) {
+                node.name = propertyName;
+            }
+            else {
+                parseExpected(54 /* ColonToken */);
+                node.propertyName = propertyName;
+                node.name = parseIdentifierOrPattern();
+            }
+            node.initializer = parseBindingElementInitializer(/*inParameter*/ false);
+            return finishNode(node);
+        }
+        function parseObjectBindingPattern() {
+            var node = createNode(167 /* ObjectBindingPattern */);
+            parseExpected(15 /* OpenBraceToken */);
+            node.elements = parseDelimitedList(9 /* ObjectBindingElements */, parseObjectBindingElement);
+            parseExpected(16 /* CloseBraceToken */);
+            return finishNode(node);
+        }
+        function parseArrayBindingPattern() {
+            var node = createNode(168 /* ArrayBindingPattern */);
+            parseExpected(19 /* OpenBracketToken */);
+            node.elements = parseDelimitedList(10 /* ArrayBindingElements */, parseArrayBindingElement);
+            parseExpected(20 /* CloseBracketToken */);
+            return finishNode(node);
+        }
+        function isIdentifierOrPattern() {
+            return token === 15 /* OpenBraceToken */ || token === 19 /* OpenBracketToken */ || isIdentifier();
+        }
+        function parseIdentifierOrPattern() {
+            if (token === 19 /* OpenBracketToken */) {
+                return parseArrayBindingPattern();
+            }
+            if (token === 15 /* OpenBraceToken */) {
+                return parseObjectBindingPattern();
+            }
+            return parseIdentifier();
+        }
+        function parseVariableDeclaration() {
+            var node = createNode(218 /* VariableDeclaration */);
+            node.name = parseIdentifierOrPattern();
+            node.type = parseTypeAnnotation();
+            if (!isInOrOfKeyword(token)) {
+                node.initializer = parseInitializer(/*inParameter*/ false);
+            }
+            return finishNode(node);
+        }
+        function parseVariableDeclarationList(inForStatementInitializer) {
+            var node = createNode(219 /* VariableDeclarationList */);
+            switch (token) {
+                case 102 /* VarKeyword */:
+                    break;
+                case 108 /* LetKeyword */:
+                    node.flags |= 1024 /* Let */;
+                    break;
+                case 74 /* ConstKeyword */:
+                    node.flags |= 2048 /* Const */;
+                    break;
+                default:
+                    ts.Debug.fail();
+            }
+            nextToken();
+            // The user may have written the following:
+            //
+            //    for (let of X) { }
+            //
+            // In this case, we want to parse an empty declaration list, and then parse 'of'
+            // as a keyword. The reason this is not automatic is that 'of' is a valid identifier.
+            // So we need to look ahead to determine if 'of' should be treated as a keyword in
+            // this context.
+            // The checker will then give an error that there is an empty declaration list.
+            if (token === 138 /* OfKeyword */ && lookAhead(canFollowContextualOfKeyword)) {
+                node.declarations = createMissingList();
+            }
+            else {
+                var savedDisallowIn = inDisallowInContext();
+                setDisallowInContext(inForStatementInitializer);
+                node.declarations = parseDelimitedList(8 /* VariableDeclarations */, parseVariableDeclaration);
+                setDisallowInContext(savedDisallowIn);
+            }
+            return finishNode(node);
+        }
+        function canFollowContextualOfKeyword() {
+            return nextTokenIsIdentifier() && nextToken() === 18 /* CloseParenToken */;
+        }
+        function parseVariableStatement(fullStart, decorators, modifiers) {
+            var node = createNode(200 /* VariableStatement */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.declarationList = parseVariableDeclarationList(/*inForStatementInitializer*/ false);
+            parseSemicolon();
+            return addJSDocComment(finishNode(node));
+        }
+        function parseFunctionDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(220 /* FunctionDeclaration */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(87 /* FunctionKeyword */);
+            node.asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
+            node.name = node.flags & 512 /* Default */ ? parseOptionalIdentifier() : parseIdentifier();
+            var isGenerator = !!node.asteriskToken;
+            var isAsync = !!(node.flags & 256 /* Async */);
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseConstructorDeclaration(pos, decorators, modifiers) {
+            var node = createNode(148 /* Constructor */, pos);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(121 /* ConstructorKeyword */);
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false, ts.Diagnostics.or_expected);
+            return addJSDocComment(finishNode(node));
+        }
+        function parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, diagnosticMessage) {
+            var method = createNode(147 /* MethodDeclaration */, fullStart);
+            method.decorators = decorators;
+            setModifiers(method, modifiers);
+            method.asteriskToken = asteriskToken;
+            method.name = name;
+            method.questionToken = questionToken;
+            var isGenerator = !!asteriskToken;
+            var isAsync = !!(method.flags & 256 /* Async */);
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ isGenerator, /*awaitContext*/ isAsync, /*requireCompleteParameterList*/ false, method);
+            method.body = parseFunctionBlockOrSemicolon(isGenerator, isAsync, diagnosticMessage);
+            return addJSDocComment(finishNode(method));
+        }
+        function parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken) {
+            var property = createNode(145 /* PropertyDeclaration */, fullStart);
+            property.decorators = decorators;
+            setModifiers(property, modifiers);
+            property.name = name;
+            property.questionToken = questionToken;
+            property.type = parseTypeAnnotation();
+            // For instance properties specifically, since they are evaluated inside the constructor,
+            // we do *not * want to parse yield expressions, so we specifically turn the yield context
+            // off. The grammar would look something like this:
+            //
+            //    MemberVariableDeclaration[Yield]:
+            //        AccessibilityModifier_opt   PropertyName   TypeAnnotation_opt   Initializer_opt[In];
+            //        AccessibilityModifier_opt  static_opt  PropertyName   TypeAnnotation_opt   Initializer_opt[In, ?Yield];
+            //
+            // The checker may still error in the static case to explicitly disallow the yield expression.
+            property.initializer = modifiers && modifiers.flags & 32 /* Static */
+                ? allowInAnd(parseNonParameterInitializer)
+                : doOutsideOfContext(8388608 /* YieldContext */ | 4194304 /* DisallowInContext */, parseNonParameterInitializer);
+            parseSemicolon();
+            return finishNode(property);
+        }
+        function parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers) {
+            var asteriskToken = parseOptionalToken(37 /* AsteriskToken */);
+            var name = parsePropertyName();
+            // Note: this is not legal as per the grammar.  But we allow it in the parser and
+            // report an error in the grammar checker.
+            var questionToken = parseOptionalToken(53 /* QuestionToken */);
+            if (asteriskToken || token === 17 /* OpenParenToken */ || token === 25 /* LessThanToken */) {
+                return parseMethodDeclaration(fullStart, decorators, modifiers, asteriskToken, name, questionToken, ts.Diagnostics.or_expected);
+            }
+            else {
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name, questionToken);
+            }
+        }
+        function parseNonParameterInitializer() {
+            return parseInitializer(/*inParameter*/ false);
+        }
+        function parseAccessorDeclaration(kind, fullStart, decorators, modifiers) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.name = parsePropertyName();
+            fillSignature(54 /* ColonToken */, /*yieldContext*/ false, /*awaitContext*/ false, /*requireCompleteParameterList*/ false, node);
+            node.body = parseFunctionBlockOrSemicolon(/*isGenerator*/ false, /*isAsync*/ false);
+            return finishNode(node);
+        }
+        function isClassMemberModifier(idToken) {
+            switch (idToken) {
+                case 112 /* PublicKeyword */:
+                case 110 /* PrivateKeyword */:
+                case 111 /* ProtectedKeyword */:
+                case 113 /* StaticKeyword */:
+                case 128 /* ReadonlyKeyword */:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isClassMemberStart() {
+            var idToken;
+            if (token === 55 /* AtToken */) {
+                return true;
+            }
+            // Eat up all modifiers, but hold on to the last one in case it is actually an identifier.
+            while (ts.isModifierKind(token)) {
+                idToken = token;
+                // If the idToken is a class modifier (protected, private, public, and static), it is
+                // certain that we are starting to parse class member. This allows better error recovery
+                // Example:
+                //      public foo() ...     // true
+                //      public @dec blah ... // true; we will then report an error later
+                //      export public ...    // true; we will then report an error later
+                if (isClassMemberModifier(idToken)) {
+                    return true;
+                }
+                nextToken();
+            }
+            if (token === 37 /* AsteriskToken */) {
+                return true;
+            }
+            // Try to get the first property-like token following all modifiers.
+            // This can either be an identifier or the 'get' or 'set' keywords.
+            if (isLiteralPropertyName()) {
+                idToken = token;
+                nextToken();
+            }
+            // Index signatures and computed properties are class members; we can parse.
+            if (token === 19 /* OpenBracketToken */) {
+                return true;
+            }
+            // If we were able to get any potential identifier...
+            if (idToken !== undefined) {
+                // If we have a non-keyword identifier, or if we have an accessor, then it's safe to parse.
+                if (!ts.isKeyword(idToken) || idToken === 131 /* SetKeyword */ || idToken === 123 /* GetKeyword */) {
+                    return true;
+                }
+                // If it *is* a keyword, but not an accessor, check a little farther along
+                // to see if it should actually be parsed as a class member.
+                switch (token) {
+                    case 17 /* OpenParenToken */: // Method declaration
+                    case 25 /* LessThanToken */: // Generic Method declaration
+                    case 54 /* ColonToken */: // Type Annotation for declaration
+                    case 56 /* EqualsToken */: // Initializer for declaration
+                    case 53 /* QuestionToken */:
+                        return true;
+                    default:
+                        // Covers
+                        //  - Semicolons     (declaration termination)
+                        //  - Closing braces (end-of-class, must be declaration)
+                        //  - End-of-files   (not valid, but permitted so that it gets caught later on)
+                        //  - Line-breaks    (enabling *automatic semicolon insertion*)
+                        return canParseSemicolon();
+                }
+            }
+            return false;
+        }
+        function parseDecorators() {
+            var decorators;
+            while (true) {
+                var decoratorStart = getNodePos();
+                if (!parseOptional(55 /* AtToken */)) {
+                    break;
+                }
+                if (!decorators) {
+                    decorators = [];
+                    decorators.pos = decoratorStart;
+                }
+                var decorator = createNode(143 /* Decorator */, decoratorStart);
+                decorator.expression = doInDecoratorContext(parseLeftHandSideExpressionOrHigher);
+                decorators.push(finishNode(decorator));
+            }
+            if (decorators) {
+                decorators.end = getNodeEnd();
+            }
+            return decorators;
+        }
+        /*
+         * There are situations in which a modifier like 'const' will appear unexpectedly, such as on a class member.
+         * In those situations, if we are entirely sure that 'const' is not valid on its own (such as when ASI takes effect
+         * and turns it into a standalone declaration), then it is better to parse it and report an error later.
+         *
+         * In such situations, 'permitInvalidConstAsModifier' should be set to true.
+         */
+        function parseModifiers(permitInvalidConstAsModifier) {
+            var flags = 0;
+            var modifiers;
+            while (true) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token;
+                if (token === 74 /* ConstKeyword */ && permitInvalidConstAsModifier) {
+                    // We need to ensure that any subsequent modifiers appear on the same line
+                    // so that when 'const' is a standalone declaration, we don't issue an error.
+                    if (!tryParse(nextTokenIsOnSameLineAndCanFollowModifier)) {
+                        break;
+                    }
+                }
+                else {
+                    if (!parseAnyContextualModifier()) {
+                        break;
+                    }
+                }
+                if (!modifiers) {
+                    modifiers = [];
+                    modifiers.pos = modifierStart;
+                }
+                flags |= ts.modifierToFlag(modifierKind);
+                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
+            }
+            if (modifiers) {
+                modifiers.flags = flags;
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
+        }
+        function parseModifiersForArrowFunction() {
+            var flags = 0;
+            var modifiers;
+            if (token === 118 /* AsyncKeyword */) {
+                var modifierStart = scanner.getStartPos();
+                var modifierKind = token;
+                nextToken();
+                modifiers = [];
+                modifiers.pos = modifierStart;
+                flags |= ts.modifierToFlag(modifierKind);
+                modifiers.push(finishNode(createNode(modifierKind, modifierStart)));
+                modifiers.flags = flags;
+                modifiers.end = scanner.getStartPos();
+            }
+            return modifiers;
+        }
+        function parseClassElement() {
+            if (token === 23 /* SemicolonToken */) {
+                var result = createNode(198 /* SemicolonClassElement */);
+                nextToken();
+                return finishNode(result);
+            }
+            var fullStart = getNodePos();
+            var decorators = parseDecorators();
+            var modifiers = parseModifiers(/*permitInvalidConstAsModifier*/ true);
+            var accessor = tryParseAccessorDeclaration(fullStart, decorators, modifiers);
+            if (accessor) {
+                return accessor;
+            }
+            if (token === 121 /* ConstructorKeyword */) {
+                return parseConstructorDeclaration(fullStart, decorators, modifiers);
+            }
+            if (isIndexSignature()) {
+                return parseIndexSignatureDeclaration(fullStart, decorators, modifiers);
+            }
+            // It is very important that we check this *after* checking indexers because
+            // the [ token can start an index signature or a computed property name
+            if (ts.tokenIsIdentifierOrKeyword(token) ||
+                token === 9 /* StringLiteral */ ||
+                token === 8 /* NumericLiteral */ ||
+                token === 37 /* AsteriskToken */ ||
+                token === 19 /* OpenBracketToken */) {
+                return parsePropertyOrMethodDeclaration(fullStart, decorators, modifiers);
+            }
+            if (decorators || modifiers) {
+                // treat this as a property declaration with a missing name.
+                var name_7 = createMissingNode(69 /* Identifier */, /*reportAtCurrentPosition*/ true, ts.Diagnostics.Declaration_expected);
+                return parsePropertyDeclaration(fullStart, decorators, modifiers, name_7, /*questionToken*/ undefined);
+            }
+            // 'isClassMemberStart' should have hinted not to attempt parsing.
+            ts.Debug.fail("Should not have attempted to parse class member declaration.");
+        }
+        function parseClassExpression() {
+            return parseClassDeclarationOrExpression(
+            /*fullStart*/ scanner.getStartPos(), 
+            /*decorators*/ undefined, 
+            /*modifiers*/ undefined, 192 /* ClassExpression */);
+        }
+        function parseClassDeclaration(fullStart, decorators, modifiers) {
+            return parseClassDeclarationOrExpression(fullStart, decorators, modifiers, 221 /* ClassDeclaration */);
+        }
+        function parseClassDeclarationOrExpression(fullStart, decorators, modifiers, kind) {
+            var node = createNode(kind, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(73 /* ClassKeyword */);
+            node.name = parseNameOfClassDeclarationOrExpression();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ true);
+            if (parseExpected(15 /* OpenBraceToken */)) {
+                // ClassTail[Yield,Await] : (Modified) See 14.5
+                //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
+                node.members = parseClassMembers();
+                parseExpected(16 /* CloseBraceToken */);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseNameOfClassDeclarationOrExpression() {
+            // implements is a future reserved word so
+            // 'class implements' might mean either
+            // - class expression with omitted name, 'implements' starts heritage clause
+            // - class with name 'implements'
+            // 'isImplementsClause' helps to disambiguate between these two cases
+            return isIdentifier() && !isImplementsClause()
+                ? parseIdentifier()
+                : undefined;
+        }
+        function isImplementsClause() {
+            return token === 106 /* ImplementsKeyword */ && lookAhead(nextTokenIsIdentifierOrKeyword);
+        }
+        function parseHeritageClauses(isClassHeritageClause) {
+            // ClassTail[Yield,Await] : (Modified) See 14.5
+            //      ClassHeritage[?Yield,?Await]opt { ClassBody[?Yield,?Await]opt }
+            if (isHeritageClause()) {
+                return parseList(20 /* HeritageClauses */, parseHeritageClause);
+            }
+            return undefined;
+        }
+        function parseHeritageClause() {
+            if (token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */) {
+                var node = createNode(251 /* HeritageClause */);
+                node.token = token;
+                nextToken();
+                node.types = parseDelimitedList(7 /* HeritageClauseElement */, parseExpressionWithTypeArguments);
+                return finishNode(node);
+            }
+            return undefined;
+        }
+        function parseExpressionWithTypeArguments() {
+            var node = createNode(194 /* ExpressionWithTypeArguments */);
+            node.expression = parseLeftHandSideExpressionOrHigher();
+            if (token === 25 /* LessThanToken */) {
+                node.typeArguments = parseBracketedList(18 /* TypeArguments */, parseType, 25 /* LessThanToken */, 27 /* GreaterThanToken */);
+            }
+            return finishNode(node);
+        }
+        function isHeritageClause() {
+            return token === 83 /* ExtendsKeyword */ || token === 106 /* ImplementsKeyword */;
+        }
+        function parseClassMembers() {
+            return parseList(5 /* ClassMembers */, parseClassElement);
+        }
+        function parseInterfaceDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(222 /* InterfaceDeclaration */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(107 /* InterfaceKeyword */);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            node.heritageClauses = parseHeritageClauses(/*isClassHeritageClause*/ false);
+            node.members = parseObjectTypeMembers();
+            return finishNode(node);
+        }
+        function parseTypeAliasDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(223 /* TypeAliasDeclaration */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(134 /* TypeKeyword */);
+            node.name = parseIdentifier();
+            node.typeParameters = parseTypeParameters();
+            parseExpected(56 /* EqualsToken */);
+            node.type = parseType();
+            parseSemicolon();
+            return finishNode(node);
+        }
+        // In an ambient declaration, the grammar only allows integer literals as initializers.
+        // In a non-ambient declaration, the grammar allows uninitialized members only in a
+        // ConstantEnumMemberSection, which starts at the beginning of an enum declaration
+        // or any time an integer literal initializer is encountered.
+        function parseEnumMember() {
+            var node = createNode(255 /* EnumMember */, scanner.getStartPos());
+            node.name = parsePropertyName();
+            node.initializer = allowInAnd(parseNonParameterInitializer);
+            return finishNode(node);
+        }
+        function parseEnumDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(224 /* EnumDeclaration */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            parseExpected(81 /* EnumKeyword */);
+            node.name = parseIdentifier();
+            if (parseExpected(15 /* OpenBraceToken */)) {
+                node.members = parseDelimitedList(6 /* EnumMembers */, parseEnumMember);
+                parseExpected(16 /* CloseBraceToken */);
+            }
+            else {
+                node.members = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseModuleBlock() {
+            var node = createNode(226 /* ModuleBlock */, scanner.getStartPos());
+            if (parseExpected(15 /* OpenBraceToken */)) {
+                node.statements = parseList(1 /* BlockStatements */, parseStatement);
+                parseExpected(16 /* CloseBraceToken */);
+            }
+            else {
+                node.statements = createMissingList();
+            }
+            return finishNode(node);
+        }
+        function parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags) {
+            var node = createNode(225 /* ModuleDeclaration */, fullStart);
+            // If we are parsing a dotted namespace name, we want to
+            // propagate the 'Namespace' flag across the names if set.
+            var namespaceFlag = flags & 4096 /* Namespace */;
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            node.flags |= flags;
+            node.name = parseIdentifier();
+            node.body = parseOptional(21 /* DotToken */)
+                ? parseModuleOrNamespaceDeclaration(getNodePos(), /*decorators*/ undefined, /*modifiers*/ undefined, 1 /* Export */ | namespaceFlag)
+                : parseModuleBlock();
+            return finishNode(node);
+        }
+        function parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(225 /* ModuleDeclaration */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (token === 137 /* GlobalKeyword */) {
+                // parse 'global' as name of global scope augmentation
+                node.name = parseIdentifier();
+                node.flags |= 131072 /* GlobalAugmentation */;
+            }
+            else {
+                node.name = parseLiteralNode(/*internName*/ true);
+            }
+            node.body = parseModuleBlock();
+            return finishNode(node);
+        }
+        function parseModuleDeclaration(fullStart, decorators, modifiers) {
+            var flags = modifiers ? modifiers.flags : 0;
+            if (token === 137 /* GlobalKeyword */) {
+                // global augmentation
+                return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+            }
+            else if (parseOptional(126 /* NamespaceKeyword */)) {
+                flags |= 4096 /* Namespace */;
+            }
+            else {
+                parseExpected(125 /* ModuleKeyword */);
+                if (token === 9 /* StringLiteral */) {
+                    return parseAmbientExternalModuleDeclaration(fullStart, decorators, modifiers);
+                }
+            }
+            return parseModuleOrNamespaceDeclaration(fullStart, decorators, modifiers, flags);
+        }
+        function isExternalModuleReference() {
+            return token === 129 /* RequireKeyword */ &&
+                lookAhead(nextTokenIsOpenParen);
+        }
+        function nextTokenIsOpenParen() {
+            return nextToken() === 17 /* OpenParenToken */;
+        }
+        function nextTokenIsSlash() {
+            return nextToken() === 39 /* SlashToken */;
+        }
+        function parseGlobalModuleExportDeclaration(fullStart, decorators, modifiers) {
+            var exportDeclaration = createNode(228 /* NamespaceExportDeclaration */, fullStart);
+            exportDeclaration.decorators = decorators;
+            exportDeclaration.modifiers = modifiers;
+            parseExpected(116 /* AsKeyword */);
+            parseExpected(126 /* NamespaceKeyword */);
+            exportDeclaration.name = parseIdentifier();
+            parseExpected(23 /* SemicolonToken */);
+            return finishNode(exportDeclaration);
+        }
+        function parseImportDeclarationOrImportEqualsDeclaration(fullStart, decorators, modifiers) {
+            parseExpected(89 /* ImportKeyword */);
+            var afterImportPos = scanner.getStartPos();
+            var identifier;
+            if (isIdentifier()) {
+                identifier = parseIdentifier();
+                if (token !== 24 /* CommaToken */ && token !== 136 /* FromKeyword */) {
+                    // ImportEquals declaration of type:
+                    // import x = require("mod"); or
+                    // import x = M.x;
+                    var importEqualsDeclaration = createNode(229 /* ImportEqualsDeclaration */, fullStart);
+                    importEqualsDeclaration.decorators = decorators;
+                    setModifiers(importEqualsDeclaration, modifiers);
+                    importEqualsDeclaration.name = identifier;
+                    parseExpected(56 /* EqualsToken */);
+                    importEqualsDeclaration.moduleReference = parseModuleReference();
+                    parseSemicolon();
+                    return finishNode(importEqualsDeclaration);
+                }
+            }
+            // Import statement
+            var importDeclaration = createNode(230 /* ImportDeclaration */, fullStart);
+            importDeclaration.decorators = decorators;
+            setModifiers(importDeclaration, modifiers);
+            // ImportDeclaration:
+            //  import ImportClause from ModuleSpecifier ;
+            //  import ModuleSpecifier;
+            if (identifier ||
+                token === 37 /* AsteriskToken */ ||
+                token === 15 /* OpenBraceToken */) {
+                importDeclaration.importClause = parseImportClause(identifier, afterImportPos);
+                parseExpected(136 /* FromKeyword */);
+            }
+            importDeclaration.moduleSpecifier = parseModuleSpecifier();
+            parseSemicolon();
+            return finishNode(importDeclaration);
+        }
+        function parseImportClause(identifier, fullStart) {
+            // ImportClause:
+            //  ImportedDefaultBinding
+            //  NameSpaceImport
+            //  NamedImports
+            //  ImportedDefaultBinding, NameSpaceImport
+            //  ImportedDefaultBinding, NamedImports
+            var importClause = createNode(231 /* ImportClause */, fullStart);
+            if (identifier) {
+                // ImportedDefaultBinding:
+                //  ImportedBinding
+                importClause.name = identifier;
+            }
+            // If there was no default import or if there is comma token after default import
+            // parse namespace or named imports
+            if (!importClause.name ||
+                parseOptional(24 /* CommaToken */)) {
+                importClause.namedBindings = token === 37 /* AsteriskToken */ ? parseNamespaceImport() : parseNamedImportsOrExports(233 /* NamedImports */);
+            }
+            return finishNode(importClause);
+        }
+        function parseModuleReference() {
+            return isExternalModuleReference()
+                ? parseExternalModuleReference()
+                : parseEntityName(/*allowReservedWords*/ false);
+        }
+        function parseExternalModuleReference() {
+            var node = createNode(240 /* ExternalModuleReference */);
+            parseExpected(129 /* RequireKeyword */);
+            parseExpected(17 /* OpenParenToken */);
+            node.expression = parseModuleSpecifier();
+            parseExpected(18 /* CloseParenToken */);
+            return finishNode(node);
+        }
+        function parseModuleSpecifier() {
+            if (token === 9 /* StringLiteral */) {
+                var result = parseLiteralNode();
+                internIdentifier(result.text);
+                return result;
+            }
+            else {
+                // We allow arbitrary expressions here, even though the grammar only allows string
+                // literals.  We check to ensure that it is only a string literal later in the grammar
+                // check pass.
+                return parseExpression();
+            }
+        }
+        function parseNamespaceImport() {
+            // NameSpaceImport:
+            //  * as ImportedBinding
+            var namespaceImport = createNode(232 /* NamespaceImport */);
+            parseExpected(37 /* AsteriskToken */);
+            parseExpected(116 /* AsKeyword */);
+            namespaceImport.name = parseIdentifier();
+            return finishNode(namespaceImport);
+        }
+        function parseNamedImportsOrExports(kind) {
+            var node = createNode(kind);
+            // NamedImports:
+            //  { }
+            //  { ImportsList }
+            //  { ImportsList, }
+            // ImportsList:
+            //  ImportSpecifier
+            //  ImportsList, ImportSpecifier
+            node.elements = parseBracketedList(21 /* ImportOrExportSpecifiers */, kind === 233 /* NamedImports */ ? parseImportSpecifier : parseExportSpecifier, 15 /* OpenBraceToken */, 16 /* CloseBraceToken */);
+            return finishNode(node);
+        }
+        function parseExportSpecifier() {
+            return parseImportOrExportSpecifier(238 /* ExportSpecifier */);
+        }
+        function parseImportSpecifier() {
+            return parseImportOrExportSpecifier(234 /* ImportSpecifier */);
+        }
+        function parseImportOrExportSpecifier(kind) {
+            var node = createNode(kind);
+            // ImportSpecifier:
+            //   BindingIdentifier
+            //   IdentifierName as BindingIdentifier
+            // ExportSpecifier:
+            //   IdentifierName
+            //   IdentifierName as IdentifierName
+            var checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
+            var checkIdentifierStart = scanner.getTokenPos();
+            var checkIdentifierEnd = scanner.getTextPos();
+            var identifierName = parseIdentifierName();
+            if (token === 116 /* AsKeyword */) {
+                node.propertyName = identifierName;
+                parseExpected(116 /* AsKeyword */);
+                checkIdentifierIsKeyword = ts.isKeyword(token) && !isIdentifier();
+                checkIdentifierStart = scanner.getTokenPos();
+                checkIdentifierEnd = scanner.getTextPos();
+                node.name = parseIdentifierName();
+            }
+            else {
+                node.name = identifierName;
+            }
+            if (kind === 234 /* ImportSpecifier */ && checkIdentifierIsKeyword) {
+                // Report error identifier expected
+                parseErrorAtPosition(checkIdentifierStart, checkIdentifierEnd - checkIdentifierStart, ts.Diagnostics.Identifier_expected);
+            }
+            return finishNode(node);
+        }
+        function parseExportDeclaration(fullStart, decorators, modifiers) {
+            var node = createNode(236 /* ExportDeclaration */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (parseOptional(37 /* AsteriskToken */)) {
+                parseExpected(136 /* FromKeyword */);
+                node.moduleSpecifier = parseModuleSpecifier();
+            }
+            else {
+                node.exportClause = parseNamedImportsOrExports(237 /* NamedExports */);
+                // It is not uncommon to accidentally omit the 'from' keyword. Additionally, in editing scenarios,
+                // the 'from' keyword can be parsed as a named export when the export clause is unterminated (i.e. `export { from "moduleName";`)
+                // If we don't have a 'from' keyword, see if we have a string literal such that ASI won't take effect.
+                if (token === 136 /* FromKeyword */ || (token === 9 /* StringLiteral */ && !scanner.hasPrecedingLineBreak())) {
+                    parseExpected(136 /* FromKeyword */);
+                    node.moduleSpecifier = parseModuleSpecifier();
+                }
+            }
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function parseExportAssignment(fullStart, decorators, modifiers) {
+            var node = createNode(235 /* ExportAssignment */, fullStart);
+            node.decorators = decorators;
+            setModifiers(node, modifiers);
+            if (parseOptional(56 /* EqualsToken */)) {
+                node.isExportEquals = true;
+            }
+            else {
+                parseExpected(77 /* DefaultKeyword */);
+            }
+            node.expression = parseAssignmentExpressionOrHigher();
+            parseSemicolon();
+            return finishNode(node);
+        }
+        function processReferenceComments(sourceFile) {
+            var triviaScanner = ts.createScanner(sourceFile.languageVersion, /*skipTrivia*/ false, 0 /* Standard */, sourceText);
+            var referencedFiles = [];
+            var typeReferenceDirectives = [];
+            var amdDependencies = [];
+            var amdModuleName;
+            // Keep scanning all the leading trivia in the file until we get to something that
+            // isn't trivia.  Any single line comment will be analyzed to see if it is a
+            // reference comment.
+            while (true) {
+                var kind = triviaScanner.scan();
+                if (kind !== 2 /* SingleLineCommentTrivia */) {
+                    if (ts.isTrivia(kind)) {
+                        continue;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                var range = { pos: triviaScanner.getTokenPos(), end: triviaScanner.getTextPos(), kind: triviaScanner.getToken() };
+                var comment = sourceText.substring(range.pos, range.end);
+                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, range);
+                if (referencePathMatchResult) {
+                    var fileReference = referencePathMatchResult.fileReference;
+                    sourceFile.hasNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
+                    var diagnosticMessage = referencePathMatchResult.diagnosticMessage;
+                    if (fileReference) {
+                        if (referencePathMatchResult.isTypeReferenceDirective) {
+                            typeReferenceDirectives.push(fileReference);
+                        }
+                        else {
+                            referencedFiles.push(fileReference);
+                        }
+                    }
+                    if (diagnosticMessage) {
+                        parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, diagnosticMessage));
+                    }
+                }
+                else {
+                    var amdModuleNameRegEx = /^\/\/\/\s*<amd-module\s+name\s*=\s*('|")(.+?)\1/gim;
+                    var amdModuleNameMatchResult = amdModuleNameRegEx.exec(comment);
+                    if (amdModuleNameMatchResult) {
+                        if (amdModuleName) {
+                            parseDiagnostics.push(ts.createFileDiagnostic(sourceFile, range.pos, range.end - range.pos, ts.Diagnostics.An_AMD_module_cannot_have_multiple_name_assignments));
+                        }
+                        amdModuleName = amdModuleNameMatchResult[2];
+                    }
+                    var amdDependencyRegEx = /^\/\/\/\s*<amd-dependency\s/gim;
+                    var pathRegex = /\spath\s*=\s*('|")(.+?)\1/gim;
+                    var nameRegex = /\sname\s*=\s*('|")(.+?)\1/gim;
+                    var amdDependencyMatchResult = amdDependencyRegEx.exec(comment);
+                    if (amdDependencyMatchResult) {
+                        var pathMatchResult = pathRegex.exec(comment);
+                        var nameMatchResult = nameRegex.exec(comment);
+                        if (pathMatchResult) {
+                            var amdDependency = { path: pathMatchResult[2], name: nameMatchResult ? nameMatchResult[2] : undefined };
+                            amdDependencies.push(amdDependency);
+                        }
+                    }
+                }
+            }
+            sourceFile.referencedFiles = referencedFiles;
+            sourceFile.typeReferenceDirectives = typeReferenceDirectives;
+            sourceFile.amdDependencies = amdDependencies;
+            sourceFile.moduleName = amdModuleName;
+        }
+        function setExternalModuleIndicator(sourceFile) {
+            sourceFile.externalModuleIndicator = ts.forEach(sourceFile.statements, function (node) {
+                return node.flags & 1 /* Export */
+                    || node.kind === 229 /* ImportEqualsDeclaration */ && node.moduleReference.kind === 240 /* ExternalModuleReference */
+                    || node.kind === 230 /* ImportDeclaration */
+                    || node.kind === 235 /* ExportAssignment */
+                    || node.kind === 236 /* ExportDeclaration */
+                    ? node
+                    : undefined;
+            });
+        }
+        var ParsingContext;
+        (function (ParsingContext) {
+            ParsingContext[ParsingContext["SourceElements"] = 0] = "SourceElements";
+            ParsingContext[ParsingContext["BlockStatements"] = 1] = "BlockStatements";
+            ParsingContext[ParsingContext["SwitchClauses"] = 2] = "SwitchClauses";
+            ParsingContext[ParsingContext["SwitchClauseStatements"] = 3] = "SwitchClauseStatements";
+            ParsingContext[ParsingContext["TypeMembers"] = 4] = "TypeMembers";
+            ParsingContext[ParsingContext["ClassMembers"] = 5] = "ClassMembers";
+            ParsingContext[ParsingContext["EnumMembers"] = 6] = "EnumMembers";
+            ParsingContext[ParsingContext["HeritageClauseElement"] = 7] = "HeritageClauseElement";
+            ParsingContext[ParsingContext["VariableDeclarations"] = 8] = "VariableDeclarations";
+            ParsingContext[ParsingContext["ObjectBindingElements"] = 9] = "ObjectBindingElements";
+            ParsingContext[ParsingContext["ArrayBindingElements"] = 10] = "ArrayBindingElements";
+            ParsingContext[ParsingContext["ArgumentExpressions"] = 11] = "ArgumentExpressions";
+            ParsingContext[ParsingContext["ObjectLiteralMembers"] = 12] = "ObjectLiteralMembers";
+            ParsingContext[ParsingContext["JsxAttributes"] = 13] = "JsxAttributes";
+            ParsingContext[ParsingContext["JsxChildren"] = 14] = "JsxChildren";
+            ParsingContext[ParsingContext["ArrayLiteralMembers"] = 15] = "ArrayLiteralMembers";
+            ParsingContext[ParsingContext["Parameters"] = 16] = "Parameters";
+            ParsingContext[ParsingContext["TypeParameters"] = 17] = "TypeParameters";
+            ParsingContext[ParsingContext["TypeArguments"] = 18] = "TypeArguments";
+            ParsingContext[ParsingContext["TupleElementTypes"] = 19] = "TupleElementTypes";
+            ParsingContext[ParsingContext["HeritageClauses"] = 20] = "HeritageClauses";
+            ParsingContext[ParsingContext["ImportOrExportSpecifiers"] = 21] = "ImportOrExportSpecifiers";
+            ParsingContext[ParsingContext["JSDocFunctionParameters"] = 22] = "JSDocFunctionParameters";
+            ParsingContext[ParsingContext["JSDocTypeArguments"] = 23] = "JSDocTypeArguments";
+            ParsingContext[ParsingContext["JSDocRecordMembers"] = 24] = "JSDocRecordMembers";
+            ParsingContext[ParsingContext["JSDocTupleTypes"] = 25] = "JSDocTupleTypes";
+            ParsingContext[ParsingContext["Count"] = 26] = "Count"; // Number of parsing contexts
+        })(ParsingContext || (ParsingContext = {}));
+        var Tristate;
+        (function (Tristate) {
+            Tristate[Tristate["False"] = 0] = "False";
+            Tristate[Tristate["True"] = 1] = "True";
+            Tristate[Tristate["Unknown"] = 2] = "Unknown";
+        })(Tristate || (Tristate = {}));
+        var JSDocParser;
+        (function (JSDocParser) {
+            function isJSDocType() {
+                switch (token) {
+                    case 37 /* AsteriskToken */:
+                    case 53 /* QuestionToken */:
+                    case 17 /* OpenParenToken */:
+                    case 19 /* OpenBracketToken */:
+                    case 49 /* ExclamationToken */:
+                    case 15 /* OpenBraceToken */:
+                    case 87 /* FunctionKeyword */:
+                    case 22 /* DotDotDotToken */:
+                    case 92 /* NewKeyword */:
+                    case 97 /* ThisKeyword */:
+                        return true;
+                }
+                return ts.tokenIsIdentifierOrKeyword(token);
+            }
+            JSDocParser.isJSDocType = isJSDocType;
+            function parseJSDocTypeExpressionForTests(content, start, length) {
+                initializeState("file.js", content, 2 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
+                scanner.setText(content, start, length);
+                token = scanner.scan();
+                var jsDocTypeExpression = parseJSDocTypeExpression();
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDocTypeExpression ? { jsDocTypeExpression: jsDocTypeExpression, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseJSDocTypeExpressionForTests = parseJSDocTypeExpressionForTests;
+            // Parses out a JSDoc type expression.
+            /* @internal */
+            function parseJSDocTypeExpression() {
+                var result = createNode(257 /* JSDocTypeExpression */, scanner.getTokenPos());
+                parseExpected(15 /* OpenBraceToken */);
+                result.type = parseJSDocTopLevelType();
+                parseExpected(16 /* CloseBraceToken */);
+                fixupParentReferences(result);
+                return finishNode(result);
+            }
+            JSDocParser.parseJSDocTypeExpression = parseJSDocTypeExpression;
+            function parseJSDocTopLevelType() {
+                var type = parseJSDocType();
+                if (token === 47 /* BarToken */) {
+                    var unionType = createNode(261 /* JSDocUnionType */, type.pos);
+                    unionType.types = parseJSDocTypeList(type);
+                    type = finishNode(unionType);
+                }
+                if (token === 56 /* EqualsToken */) {
+                    var optionalType = createNode(268 /* JSDocOptionalType */, type.pos);
+                    nextToken();
+                    optionalType.type = type;
+                    type = finishNode(optionalType);
+                }
+                return type;
+            }
+            function parseJSDocType() {
+                var type = parseBasicTypeExpression();
+                while (true) {
+                    if (token === 19 /* OpenBracketToken */) {
+                        var arrayType = createNode(260 /* JSDocArrayType */, type.pos);
+                        arrayType.elementType = type;
+                        nextToken();
+                        parseExpected(20 /* CloseBracketToken */);
+                        type = finishNode(arrayType);
+                    }
+                    else if (token === 53 /* QuestionToken */) {
+                        var nullableType = createNode(263 /* JSDocNullableType */, type.pos);
+                        nullableType.type = type;
+                        nextToken();
+                        type = finishNode(nullableType);
+                    }
+                    else if (token === 49 /* ExclamationToken */) {
+                        var nonNullableType = createNode(264 /* JSDocNonNullableType */, type.pos);
+                        nonNullableType.type = type;
+                        nextToken();
+                        type = finishNode(nonNullableType);
+                    }
+                    else {
+                        break;
+                    }
+                }
+                return type;
+            }
+            function parseBasicTypeExpression() {
+                switch (token) {
+                    case 37 /* AsteriskToken */:
+                        return parseJSDocAllType();
+                    case 53 /* QuestionToken */:
+                        return parseJSDocUnknownOrNullableType();
+                    case 17 /* OpenParenToken */:
+                        return parseJSDocUnionType();
+                    case 19 /* OpenBracketToken */:
+                        return parseJSDocTupleType();
+                    case 49 /* ExclamationToken */:
+                        return parseJSDocNonNullableType();
+                    case 15 /* OpenBraceToken */:
+                        return parseJSDocRecordType();
+                    case 87 /* FunctionKeyword */:
+                        return parseJSDocFunctionType();
+                    case 22 /* DotDotDotToken */:
+                        return parseJSDocVariadicType();
+                    case 92 /* NewKeyword */:
+                        return parseJSDocConstructorType();
+                    case 97 /* ThisKeyword */:
+                        return parseJSDocThisType();
+                    case 117 /* AnyKeyword */:
+                    case 132 /* StringKeyword */:
+                    case 130 /* NumberKeyword */:
+                    case 120 /* BooleanKeyword */:
+                    case 133 /* SymbolKeyword */:
+                    case 103 /* VoidKeyword */:
+                        return parseTokenNode();
+                }
+                // TODO (drosen): Parse string literal types in JSDoc as well.
+                return parseJSDocTypeReference();
+            }
+            function parseJSDocThisType() {
+                var result = createNode(272 /* JSDocThisType */);
+                nextToken();
+                parseExpected(54 /* ColonToken */);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocConstructorType() {
+                var result = createNode(271 /* JSDocConstructorType */);
+                nextToken();
+                parseExpected(54 /* ColonToken */);
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocVariadicType() {
+                var result = createNode(270 /* JSDocVariadicType */);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocFunctionType() {
+                var result = createNode(269 /* JSDocFunctionType */);
+                nextToken();
+                parseExpected(17 /* OpenParenToken */);
+                result.parameters = parseDelimitedList(22 /* JSDocFunctionParameters */, parseJSDocParameter);
+                checkForTrailingComma(result.parameters);
+                parseExpected(18 /* CloseParenToken */);
+                if (token === 54 /* ColonToken */) {
+                    nextToken();
+                    result.type = parseJSDocType();
+                }
+                return finishNode(result);
+            }
+            function parseJSDocParameter() {
+                var parameter = createNode(142 /* Parameter */);
+                parameter.type = parseJSDocType();
+                if (parseOptional(56 /* EqualsToken */)) {
+                    parameter.questionToken = createNode(56 /* EqualsToken */);
+                }
+                return finishNode(parameter);
+            }
+            function parseJSDocTypeReference() {
+                var result = createNode(267 /* JSDocTypeReference */);
+                result.name = parseSimplePropertyName();
+                if (token === 25 /* LessThanToken */) {
+                    result.typeArguments = parseTypeArguments();
+                }
+                else {
+                    while (parseOptional(21 /* DotToken */)) {
+                        if (token === 25 /* LessThanToken */) {
+                            result.typeArguments = parseTypeArguments();
+                            break;
+                        }
+                        else {
+                            result.name = parseQualifiedName(result.name);
+                        }
+                    }
+                }
+                return finishNode(result);
+            }
+            function parseTypeArguments() {
+                // Move past the <
+                nextToken();
+                var typeArguments = parseDelimitedList(23 /* JSDocTypeArguments */, parseJSDocType);
+                checkForTrailingComma(typeArguments);
+                checkForEmptyTypeArgumentList(typeArguments);
+                parseExpected(27 /* GreaterThanToken */);
+                return typeArguments;
+            }
+            function checkForEmptyTypeArgumentList(typeArguments) {
+                if (parseDiagnostics.length === 0 && typeArguments && typeArguments.length === 0) {
+                    var start = typeArguments.pos - "<".length;
+                    var end = ts.skipTrivia(sourceText, typeArguments.end) + ">".length;
+                    return parseErrorAtPosition(start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+                }
+            }
+            function parseQualifiedName(left) {
+                var result = createNode(139 /* QualifiedName */, left.pos);
+                result.left = left;
+                result.right = parseIdentifierName();
+                return finishNode(result);
+            }
+            function parseJSDocRecordType() {
+                var result = createNode(265 /* JSDocRecordType */);
+                nextToken();
+                result.members = parseDelimitedList(24 /* JSDocRecordMembers */, parseJSDocRecordMember);
+                checkForTrailingComma(result.members);
+                parseExpected(16 /* CloseBraceToken */);
+                return finishNode(result);
+            }
+            function parseJSDocRecordMember() {
+                var result = createNode(266 /* JSDocRecordMember */);
+                result.name = parseSimplePropertyName();
+                if (token === 54 /* ColonToken */) {
+                    nextToken();
+                    result.type = parseJSDocType();
+                }
+                return finishNode(result);
+            }
+            function parseJSDocNonNullableType() {
+                var result = createNode(264 /* JSDocNonNullableType */);
+                nextToken();
+                result.type = parseJSDocType();
+                return finishNode(result);
+            }
+            function parseJSDocTupleType() {
+                var result = createNode(262 /* JSDocTupleType */);
+                nextToken();
+                result.types = parseDelimitedList(25 /* JSDocTupleTypes */, parseJSDocType);
+                checkForTrailingComma(result.types);
+                parseExpected(20 /* CloseBracketToken */);
+                return finishNode(result);
+            }
+            function checkForTrailingComma(list) {
+                if (parseDiagnostics.length === 0 && list.hasTrailingComma) {
+                    var start = list.end - ",".length;
+                    parseErrorAtPosition(start, ",".length, ts.Diagnostics.Trailing_comma_not_allowed);
+                }
+            }
+            function parseJSDocUnionType() {
+                var result = createNode(261 /* JSDocUnionType */);
+                nextToken();
+                result.types = parseJSDocTypeList(parseJSDocType());
+                parseExpected(18 /* CloseParenToken */);
+                return finishNode(result);
+            }
+            function parseJSDocTypeList(firstType) {
+                ts.Debug.assert(!!firstType);
+                var types = [];
+                types.pos = firstType.pos;
+                types.push(firstType);
+                while (parseOptional(47 /* BarToken */)) {
+                    types.push(parseJSDocType());
+                }
+                types.end = scanner.getStartPos();
+                return types;
+            }
+            function parseJSDocAllType() {
+                var result = createNode(258 /* JSDocAllType */);
+                nextToken();
+                return finishNode(result);
+            }
+            function parseJSDocUnknownOrNullableType() {
+                var pos = scanner.getStartPos();
+                // skip the ?
+                nextToken();
+                // Need to lookahead to decide if this is a nullable or unknown type.
+                // Here are cases where we'll pick the unknown type:
+                //
+                //      Foo(?,
+                //      { a: ? }
+                //      Foo(?)
+                //      Foo<?>
+                //      Foo(?=
+                //      (?|
+                if (token === 24 /* CommaToken */ ||
+                    token === 16 /* CloseBraceToken */ ||
+                    token === 18 /* CloseParenToken */ ||
+                    token === 27 /* GreaterThanToken */ ||
+                    token === 56 /* EqualsToken */ ||
+                    token === 47 /* BarToken */) {
+                    var result = createNode(259 /* JSDocUnknownType */, pos);
+                    return finishNode(result);
+                }
+                else {
+                    var result = createNode(263 /* JSDocNullableType */, pos);
+                    result.type = parseJSDocType();
+                    return finishNode(result);
+                }
+            }
+            function parseIsolatedJSDocComment(content, start, length) {
+                initializeState("file.js", content, 2 /* Latest */, /*_syntaxCursor:*/ undefined, 1 /* JS */);
+                sourceFile = { languageVariant: 0 /* Standard */, text: content };
+                var jsDocComment = parseJSDocCommentWorker(start, length);
+                var diagnostics = parseDiagnostics;
+                clearState();
+                return jsDocComment ? { jsDocComment: jsDocComment, diagnostics: diagnostics } : undefined;
+            }
+            JSDocParser.parseIsolatedJSDocComment = parseIsolatedJSDocComment;
+            function parseJSDocComment(parent, start, length) {
+                var saveToken = token;
+                var saveParseDiagnosticsLength = parseDiagnostics.length;
+                var saveParseErrorBeforeNextFinishedNode = parseErrorBeforeNextFinishedNode;
+                var comment = parseJSDocCommentWorker(start, length);
+                if (comment) {
+                    comment.parent = parent;
+                }
+                token = saveToken;
+                parseDiagnostics.length = saveParseDiagnosticsLength;
+                parseErrorBeforeNextFinishedNode = saveParseErrorBeforeNextFinishedNode;
+                return comment;
+            }
+            JSDocParser.parseJSDocComment = parseJSDocComment;
+            function parseJSDocCommentWorker(start, length) {
+                var content = sourceText;
+                start = start || 0;
+                var end = length === undefined ? content.length : start + length;
+                length = end - start;
+                ts.Debug.assert(start >= 0);
+                ts.Debug.assert(start <= end);
+                ts.Debug.assert(end <= content.length);
+                var tags;
+                var result;
+                // Check for /** (JSDoc opening part)
+                if (content.charCodeAt(start) === 47 /* slash */ &&
+                    content.charCodeAt(start + 1) === 42 /* asterisk */ &&
+                    content.charCodeAt(start + 2) === 42 /* asterisk */ &&
+                    content.charCodeAt(start + 3) !== 42 /* asterisk */) {
+                    // + 3 for leading /**, - 5 in total for /** */
+                    scanner.scanRange(start + 3, length - 5, function () {
+                        // Initially we can parse out a tag.  We also have seen a starting asterisk.
+                        // This is so that /** * @type */ doesn't parse.
+                        var canParseTag = true;
+                        var seenAsterisk = true;
+                        nextJSDocToken();
+                        while (token !== 1 /* EndOfFileToken */) {
+                            switch (token) {
+                                case 55 /* AtToken */:
+                                    if (canParseTag) {
+                                        parseTag();
+                                    }
+                                    // This will take us to the end of the line, so it's OK to parse a tag on the next pass through the loop
+                                    seenAsterisk = false;
+                                    break;
+                                case 4 /* NewLineTrivia */:
+                                    // After a line break, we can parse a tag, and we haven't seen an asterisk on the next line yet
+                                    canParseTag = true;
+                                    seenAsterisk = false;
+                                    break;
+                                case 37 /* AsteriskToken */:
+                                    if (seenAsterisk) {
+                                        // If we've already seen an asterisk, then we can no longer parse a tag on this line
+                                        canParseTag = false;
+                                    }
+                                    // Ignore the first asterisk on a line
+                                    seenAsterisk = true;
+                                    break;
+                                case 69 /* Identifier */:
+                                    // Anything else is doc comment text.  We can't do anything with it.  Because it
+                                    // wasn't a tag, we can no longer parse a tag on this line until we hit the next
+                                    // line break.
+                                    canParseTag = false;
+                                    break;
+                                case 1 /* EndOfFileToken */:
+                                    break;
+                            }
+                            nextJSDocToken();
+                        }
+                        result = createJSDocComment();
+                    });
+                }
+                return result;
+                function createJSDocComment() {
+                    if (!tags) {
+                        return undefined;
+                    }
+                    var result = createNode(273 /* JSDocComment */, start);
+                    result.tags = tags;
+                    return finishNode(result, end);
+                }
+                function skipWhitespace() {
+                    while (token === 5 /* WhitespaceTrivia */ || token === 4 /* NewLineTrivia */) {
+                        nextJSDocToken();
+                    }
+                }
+                function parseTag() {
+                    ts.Debug.assert(token === 55 /* AtToken */);
+                    var atToken = createNode(55 /* AtToken */, scanner.getTokenPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    if (!tagName) {
+                        return;
+                    }
+                    var tag = handleTag(atToken, tagName) || handleUnknownTag(atToken, tagName);
+                    addTag(tag);
+                }
+                function handleTag(atToken, tagName) {
+                    if (tagName) {
+                        switch (tagName.text) {
+                            case "param":
+                                return handleParamTag(atToken, tagName);
+                            case "return":
+                            case "returns":
+                                return handleReturnTag(atToken, tagName);
+                            case "template":
+                                return handleTemplateTag(atToken, tagName);
+                            case "type":
+                                return handleTypeTag(atToken, tagName);
+                            case "typedef":
+                                return handleTypedefTag(atToken, tagName);
+                        }
+                    }
+                    return undefined;
+                }
+                function handleUnknownTag(atToken, tagName) {
+                    var result = createNode(274 /* JSDocTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    return finishNode(result);
+                }
+                function addTag(tag) {
+                    if (tag) {
+                        if (!tags) {
+                            tags = [];
+                            tags.pos = tag.pos;
+                        }
+                        tags.push(tag);
+                        tags.end = tag.end;
+                    }
+                }
+                function tryParseTypeExpression() {
+                    if (token !== 15 /* OpenBraceToken */) {
+                        return undefined;
+                    }
+                    var typeExpression = parseJSDocTypeExpression();
+                    return typeExpression;
+                }
+                function handleParamTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var name;
+                    var isBracketed;
+                    // Looking for something like '[foo]' or 'foo'
+                    if (parseOptionalToken(19 /* OpenBracketToken */)) {
+                        name = parseJSDocIdentifierName();
+                        isBracketed = true;
+                        // May have an optional default, e.g. '[foo = 42]'
+                        if (parseOptionalToken(56 /* EqualsToken */)) {
+                            parseExpression();
+                        }
+                        parseExpected(20 /* CloseBracketToken */);
+                    }
+                    else if (ts.tokenIsIdentifierOrKeyword(token)) {
+                        name = parseJSDocIdentifierName();
+                    }
+                    if (!name) {
+                        parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var preName, postName;
+                    if (typeExpression) {
+                        postName = name;
+                    }
+                    else {
+                        preName = name;
+                    }
+                    if (!typeExpression) {
+                        typeExpression = tryParseTypeExpression();
+                    }
+                    var result = createNode(275 /* JSDocParameterTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.preParameterName = preName;
+                    result.typeExpression = typeExpression;
+                    result.postParameterName = postName;
+                    result.isBracketed = isBracketed;
+                    return finishNode(result);
+                }
+                function handleReturnTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 276 /* JSDocReturnTag */; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(276 /* JSDocReturnTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function handleTypeTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 277 /* JSDocTypeTag */; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    var result = createNode(277 /* JSDocTypeTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeExpression = tryParseTypeExpression();
+                    return finishNode(result);
+                }
+                function handlePropertyTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var name = parseJSDocIdentifierName();
+                    if (!name) {
+                        parseErrorAtPosition(scanner.getStartPos(), /*length*/ 0, ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var result = createNode(280 /* JSDocPropertyTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.name = name;
+                    result.typeExpression = typeExpression;
+                    return finishNode(result);
+                }
+                function handleTypedefTag(atToken, tagName) {
+                    var typeExpression = tryParseTypeExpression();
+                    skipWhitespace();
+                    var typedefTag = createNode(279 /* JSDocTypedefTag */, atToken.pos);
+                    typedefTag.atToken = atToken;
+                    typedefTag.tagName = tagName;
+                    typedefTag.name = parseJSDocIdentifierName();
+                    typedefTag.typeExpression = typeExpression;
+                    if (typeExpression) {
+                        if (typeExpression.type.kind === 267 /* JSDocTypeReference */) {
+                            var jsDocTypeReference = typeExpression.type;
+                            if (jsDocTypeReference.name.kind === 69 /* Identifier */) {
+                                var name_8 = jsDocTypeReference.name;
+                                if (name_8.text === "Object") {
+                                    typedefTag.jsDocTypeLiteral = scanChildTags();
+                                }
+                            }
+                        }
+                        if (!typedefTag.jsDocTypeLiteral) {
+                            typedefTag.jsDocTypeLiteral = typeExpression.type;
+                        }
+                    }
+                    else {
+                        typedefTag.jsDocTypeLiteral = scanChildTags();
+                    }
+                    return finishNode(typedefTag);
+                    function scanChildTags() {
+                        var jsDocTypeLiteral = createNode(281 /* JSDocTypeLiteral */, scanner.getStartPos());
+                        var resumePos = scanner.getStartPos();
+                        var canParseTag = true;
+                        var seenAsterisk = false;
+                        var parentTagTerminated = false;
+                        while (token !== 1 /* EndOfFileToken */ && !parentTagTerminated) {
+                            nextJSDocToken();
+                            switch (token) {
+                                case 55 /* AtToken */:
+                                    if (canParseTag) {
+                                        parentTagTerminated = !tryParseChildTag(jsDocTypeLiteral);
+                                    }
+                                    seenAsterisk = false;
+                                    break;
+                                case 4 /* NewLineTrivia */:
+                                    resumePos = scanner.getStartPos() - 1;
+                                    canParseTag = true;
+                                    seenAsterisk = false;
+                                    break;
+                                case 37 /* AsteriskToken */:
+                                    if (seenAsterisk) {
+                                        canParseTag = false;
+                                    }
+                                    seenAsterisk = true;
+                                    break;
+                                case 69 /* Identifier */:
+                                    canParseTag = false;
+                                case 1 /* EndOfFileToken */:
+                                    break;
+                            }
+                        }
+                        scanner.setTextPos(resumePos);
+                        return finishNode(jsDocTypeLiteral);
+                    }
+                }
+                function tryParseChildTag(parentTag) {
+                    ts.Debug.assert(token === 55 /* AtToken */);
+                    var atToken = createNode(55 /* AtToken */, scanner.getStartPos());
+                    atToken.end = scanner.getTextPos();
+                    nextJSDocToken();
+                    var tagName = parseJSDocIdentifierName();
+                    if (!tagName) {
+                        return false;
+                    }
+                    switch (tagName.text) {
+                        case "type":
+                            if (parentTag.jsDocTypeTag) {
+                                // already has a @type tag, terminate the parent tag now.
+                                return false;
+                            }
+                            parentTag.jsDocTypeTag = handleTypeTag(atToken, tagName);
+                            return true;
+                        case "prop":
+                        case "property":
+                            if (!parentTag.jsDocPropertyTags) {
+                                parentTag.jsDocPropertyTags = [];
+                            }
+                            var propertyTag = handlePropertyTag(atToken, tagName);
+                            parentTag.jsDocPropertyTags.push(propertyTag);
+                            return true;
+                    }
+                    return false;
+                }
+                function handleTemplateTag(atToken, tagName) {
+                    if (ts.forEach(tags, function (t) { return t.kind === 278 /* JSDocTemplateTag */; })) {
+                        parseErrorAtPosition(tagName.pos, scanner.getTokenPos() - tagName.pos, ts.Diagnostics._0_tag_already_specified, tagName.text);
+                    }
+                    // Type parameter list looks like '@template T,U,V'
+                    var typeParameters = [];
+                    typeParameters.pos = scanner.getStartPos();
+                    while (true) {
+                        var name_9 = parseJSDocIdentifierName();
+                        if (!name_9) {
+                            parseErrorAtPosition(scanner.getStartPos(), 0, ts.Diagnostics.Identifier_expected);
+                            return undefined;
+                        }
+                        var typeParameter = createNode(141 /* TypeParameter */, name_9.pos);
+                        typeParameter.name = name_9;
+                        finishNode(typeParameter);
+                        typeParameters.push(typeParameter);
+                        if (token === 24 /* CommaToken */) {
+                            nextJSDocToken();
+                        }
+                        else {
+                            break;
+                        }
+                    }
+                    var result = createNode(278 /* JSDocTemplateTag */, atToken.pos);
+                    result.atToken = atToken;
+                    result.tagName = tagName;
+                    result.typeParameters = typeParameters;
+                    finishNode(result);
+                    typeParameters.end = result.end;
+                    return result;
+                }
+                function nextJSDocToken() {
+                    return token = scanner.scanJSDocToken();
+                }
+                function parseJSDocIdentifierName() {
+                    return createJSDocIdentifier(ts.tokenIsIdentifierOrKeyword(token));
+                }
+                function createJSDocIdentifier(isIdentifier) {
+                    if (!isIdentifier) {
+                        parseErrorAtCurrentToken(ts.Diagnostics.Identifier_expected);
+                        return undefined;
+                    }
+                    var pos = scanner.getTokenPos();
+                    var end = scanner.getTextPos();
+                    var result = createNode(69 /* Identifier */, pos);
+                    result.text = content.substring(pos, end);
+                    finishNode(result, end);
+                    nextJSDocToken();
+                    return result;
+                }
+            }
+            JSDocParser.parseJSDocCommentWorker = parseJSDocCommentWorker;
+        })(JSDocParser = Parser.JSDocParser || (Parser.JSDocParser = {}));
+    })(Parser || (Parser = {}));
+    var IncrementalParser;
+    (function (IncrementalParser) {
+        function updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            aggressiveChecks = aggressiveChecks || ts.Debug.shouldAssert(2 /* Aggressive */);
+            checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks);
+            if (ts.textChangeRangeIsUnchanged(textChangeRange)) {
+                // if the text didn't change, then we can just return our current source file as-is.
+                return sourceFile;
+            }
+            if (sourceFile.statements.length === 0) {
+                // If we don't have any statements in the current source file, then there's no real
+                // way to incrementally parse.  So just do a full parse instead.
+                return Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, /*syntaxCursor*/ undefined, /*setParentNodes*/ true, sourceFile.scriptKind);
+            }
+            // Make sure we're not trying to incrementally update a source file more than once.  Once
+            // we do an update the original source file is considered unusable from that point onwards.
+            //
+            // This is because we do incremental parsing in-place.  i.e. we take nodes from the old
+            // tree and give them new positions and parents.  From that point on, trusting the old
+            // tree at all is not possible as far too much of it may violate invariants.
+            var incrementalSourceFile = sourceFile;
+            ts.Debug.assert(!incrementalSourceFile.hasBeenIncrementallyParsed);
+            incrementalSourceFile.hasBeenIncrementallyParsed = true;
+            var oldText = sourceFile.text;
+            var syntaxCursor = createSyntaxCursor(sourceFile);
+            // Make the actual change larger so that we know to reparse anything whose lookahead
+            // might have intersected the change.
+            var changeRange = extendToAffectedRange(sourceFile, textChangeRange);
+            checkChangeRange(sourceFile, newText, changeRange, aggressiveChecks);
+            // Ensure that extending the affected range only moved the start of the change range
+            // earlier in the file.
+            ts.Debug.assert(changeRange.span.start <= textChangeRange.span.start);
+            ts.Debug.assert(ts.textSpanEnd(changeRange.span) === ts.textSpanEnd(textChangeRange.span));
+            ts.Debug.assert(ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)) === ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)));
+            // The is the amount the nodes after the edit range need to be adjusted.  It can be
+            // positive (if the edit added characters), negative (if the edit deleted characters)
+            // or zero (if this was a pure overwrite with nothing added/removed).
+            var delta = ts.textChangeRangeNewSpan(changeRange).length - changeRange.span.length;
+            // If we added or removed characters during the edit, then we need to go and adjust all
+            // the nodes after the edit.  Those nodes may move forward (if we inserted chars) or they
+            // may move backward (if we deleted chars).
+            //
+            // Doing this helps us out in two ways.  First, it means that any nodes/tokens we want
+            // to reuse are already at the appropriate position in the new text.  That way when we
+            // reuse them, we don't have to figure out if they need to be adjusted.  Second, it makes
+            // it very easy to determine if we can reuse a node.  If the node's position is at where
+            // we are in the text, then we can reuse it.  Otherwise we can't.  If the node's position
+            // is ahead of us, then we'll need to rescan tokens.  If the node's position is behind
+            // us, then we'll need to skip it or crumble it as appropriate
+            //
+            // We will also adjust the positions of nodes that intersect the change range as well.
+            // By doing this, we ensure that all the positions in the old tree are consistent, not
+            // just the positions of nodes entirely before/after the change range.  By being
+            // consistent, we can then easily map from positions to nodes in the old tree easily.
+            //
+            // Also, mark any syntax elements that intersect the changed span.  We know, up front,
+            // that we cannot reuse these elements.
+            updateTokenPositionsAndMarkElements(incrementalSourceFile, changeRange.span.start, ts.textSpanEnd(changeRange.span), ts.textSpanEnd(ts.textChangeRangeNewSpan(changeRange)), delta, oldText, newText, aggressiveChecks);
+            // Now that we've set up our internal incremental state just proceed and parse the
+            // source file in the normal fashion.  When possible the parser will retrieve and
+            // reuse nodes from the old tree.
+            //
+            // Note: passing in 'true' for setNodeParents is very important.  When incrementally
+            // parsing, we will be reusing nodes from the old tree, and placing it into new
+            // parents.  If we don't set the parents now, we'll end up with an observably
+            // inconsistent tree.  Setting the parents on the new tree should be very fast.  We
+            // will immediately bail out of walking any subtrees when we can see that their parents
+            // are already correct.
+            var result = Parser.parseSourceFile(sourceFile.fileName, newText, sourceFile.languageVersion, syntaxCursor, /*setParentNodes*/ true, sourceFile.scriptKind);
+            return result;
+        }
+        IncrementalParser.updateSourceFile = updateSourceFile;
+        function moveElementEntirelyPastChangeRange(element, isArray, delta, oldText, newText, aggressiveChecks) {
+            if (isArray) {
+                visitArray(element);
+            }
+            else {
+                visitNode(element);
+            }
+            return;
+            function visitNode(node) {
+                var text = "";
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    text = oldText.substring(node.pos, node.end);
+                }
+                // Ditch any existing LS children we may have created.  This way we can avoid
+                // moving them forward.
+                if (node._children) {
+                    node._children = undefined;
+                }
+                node.pos += delta;
+                node.end += delta;
+                if (aggressiveChecks && shouldCheckNode(node)) {
+                    ts.Debug.assert(text === newText.substring(node.pos, node.end));
+                }
+                forEachChild(node, visitNode, visitArray);
+                if (node.jsDocComments) {
+                    for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        forEachChild(jsDocComment, visitNode, visitArray);
+                    }
+                }
+                checkNodePositions(node, aggressiveChecks);
+            }
+            function visitArray(array) {
+                array._children = undefined;
+                array.pos += delta;
+                array.end += delta;
+                for (var _i = 0, array_7 = array; _i < array_7.length; _i++) {
+                    var node = array_7[_i];
+                    visitNode(node);
+                }
+            }
+        }
+        function shouldCheckNode(node) {
+            switch (node.kind) {
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                case 69 /* Identifier */:
+                    return true;
+            }
+            return false;
+        }
+        function adjustIntersectingElement(element, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta) {
+            ts.Debug.assert(element.end >= changeStart, "Adjusting an element that was entirely before the change range");
+            ts.Debug.assert(element.pos <= changeRangeOldEnd, "Adjusting an element that was entirely after the change range");
+            ts.Debug.assert(element.pos <= element.end);
+            // We have an element that intersects the change range in some way.  It may have its
+            // start, or its end (or both) in the changed range.  We want to adjust any part
+            // that intersects such that the final tree is in a consistent state.  i.e. all
+            // children have spans within the span of their parent, and all siblings are ordered
+            // properly.
+            // We may need to update both the 'pos' and the 'end' of the element.
+            // If the 'pos' is before the start of the change, then we don't need to touch it.
+            // If it isn't, then the 'pos' must be inside the change.  How we update it will
+            // depend if delta is  positive or negative.  If delta is positive then we have
+            // something like:
+            //
+            //  -------------------AAA-----------------
+            //  -------------------BBBCCCCCCC-----------------
+            //
+            // In this case, we consider any node that started in the change range to still be
+            // starting at the same position.
+            //
+            // however, if the delta is negative, then we instead have something like this:
+            //
+            //  -------------------XXXYYYYYYY-----------------
+            //  -------------------ZZZ-----------------
+            //
+            // In this case, any element that started in the 'X' range will keep its position.
+            // However any element that started after that will have their pos adjusted to be
+            // at the end of the new range.  i.e. any node that started in the 'Y' range will
+            // be adjusted to have their start at the end of the 'Z' range.
+            //
+            // The element will keep its position if possible.  Or Move backward to the new-end
+            // if it's in the 'Y' range.
+            element.pos = Math.min(element.pos, changeRangeNewEnd);
+            // If the 'end' is after the change range, then we always adjust it by the delta
+            // amount.  However, if the end is in the change range, then how we adjust it
+            // will depend on if delta is  positive or negative.  If delta is positive then we
+            // have something like:
+            //
+            //  -------------------AAA-----------------
+            //  -------------------BBBCCCCCCC-----------------
+            //
+            // In this case, we consider any node that ended inside the change range to keep its
+            // end position.
+            //
+            // however, if the delta is negative, then we instead have something like this:
+            //
+            //  -------------------XXXYYYYYYY-----------------
+            //  -------------------ZZZ-----------------
+            //
+            // In this case, any element that ended in the 'X' range will keep its position.
+            // However any element that ended after that will have their pos adjusted to be
+            // at the end of the new range.  i.e. any node that ended in the 'Y' range will
+            // be adjusted to have their end at the end of the 'Z' range.
+            if (element.end >= changeRangeOldEnd) {
+                // Element ends after the change range.  Always adjust the end pos.
+                element.end += delta;
+            }
+            else {
+                // Element ends in the change range.  The element will keep its position if
+                // possible. Or Move backward to the new-end if it's in the 'Y' range.
+                element.end = Math.min(element.end, changeRangeNewEnd);
+            }
+            ts.Debug.assert(element.pos <= element.end);
+            if (element.parent) {
+                ts.Debug.assert(element.pos >= element.parent.pos);
+                ts.Debug.assert(element.end <= element.parent.end);
+            }
+        }
+        function checkNodePositions(node, aggressiveChecks) {
+            if (aggressiveChecks) {
+                var pos_2 = node.pos;
+                forEachChild(node, function (child) {
+                    ts.Debug.assert(child.pos >= pos_2);
+                    pos_2 = child.end;
+                });
+                ts.Debug.assert(pos_2 <= node.end);
+            }
+        }
+        function updateTokenPositionsAndMarkElements(sourceFile, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta, oldText, newText, aggressiveChecks) {
+            visitNode(sourceFile);
+            return;
+            function visitNode(child) {
+                ts.Debug.assert(child.pos <= child.end);
+                if (child.pos > changeRangeOldEnd) {
+                    // Node is entirely past the change range.  We need to move both its pos and
+                    // end, forward or backward appropriately.
+                    moveElementEntirelyPastChangeRange(child, /*isArray*/ false, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                // Check if the element intersects the change range.  If it does, then it is not
+                // reusable.  Also, we'll need to recurse to see what constituent portions we may
+                // be able to use.
+                var fullEnd = child.end;
+                if (fullEnd >= changeStart) {
+                    child.intersectsChange = true;
+                    child._children = undefined;
+                    // Adjust the pos or end (or both) of the intersecting element accordingly.
+                    adjustIntersectingElement(child, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    forEachChild(child, visitNode, visitArray);
+                    checkNodePositions(child, aggressiveChecks);
+                    return;
+                }
+                // Otherwise, the node is entirely before the change range.  No need to do anything with it.
+                ts.Debug.assert(fullEnd < changeStart);
+            }
+            function visitArray(array) {
+                ts.Debug.assert(array.pos <= array.end);
+                if (array.pos > changeRangeOldEnd) {
+                    // Array is entirely after the change range.  We need to move it, and move any of
+                    // its children.
+                    moveElementEntirelyPastChangeRange(array, /*isArray*/ true, delta, oldText, newText, aggressiveChecks);
+                    return;
+                }
+                // Check if the element intersects the change range.  If it does, then it is not
+                // reusable.  Also, we'll need to recurse to see what constituent portions we may
+                // be able to use.
+                var fullEnd = array.end;
+                if (fullEnd >= changeStart) {
+                    array.intersectsChange = true;
+                    array._children = undefined;
+                    // Adjust the pos or end (or both) of the intersecting array accordingly.
+                    adjustIntersectingElement(array, changeStart, changeRangeOldEnd, changeRangeNewEnd, delta);
+                    for (var _i = 0, array_8 = array; _i < array_8.length; _i++) {
+                        var node = array_8[_i];
+                        visitNode(node);
+                    }
+                    return;
+                }
+                // Otherwise, the array is entirely before the change range.  No need to do anything with it.
+                ts.Debug.assert(fullEnd < changeStart);
+            }
+        }
+        function extendToAffectedRange(sourceFile, changeRange) {
+            // Consider the following code:
+            //      void foo() { /; }
+            //
+            // If the text changes with an insertion of / just before the semicolon then we end up with:
+            //      void foo() { //; }
+            //
+            // If we were to just use the changeRange a is, then we would not rescan the { token
+            // (as it does not intersect the actual original change range).  Because an edit may
+            // change the token touching it, we actually need to look back *at least* one token so
+            // that the prior token sees that change.
+            var maxLookahead = 1;
+            var start = changeRange.span.start;
+            // the first iteration aligns us with the change start. subsequent iteration move us to
+            // the left by maxLookahead tokens.  We only need to do this as long as we're not at the
+            // start of the tree.
+            for (var i = 0; start > 0 && i <= maxLookahead; i++) {
+                var nearestNode = findNearestNodeStartingBeforeOrAtPosition(sourceFile, start);
+                ts.Debug.assert(nearestNode.pos <= start);
+                var position = nearestNode.pos;
+                start = Math.max(0, position - 1);
+            }
+            var finalSpan = ts.createTextSpanFromBounds(start, ts.textSpanEnd(changeRange.span));
+            var finalLength = changeRange.newLength + (changeRange.span.start - start);
+            return ts.createTextChangeRange(finalSpan, finalLength);
+        }
+        function findNearestNodeStartingBeforeOrAtPosition(sourceFile, position) {
+            var bestResult = sourceFile;
+            var lastNodeEntirelyBeforePosition;
+            forEachChild(sourceFile, visit);
+            if (lastNodeEntirelyBeforePosition) {
+                var lastChildOfLastEntireNodeBeforePosition = getLastChild(lastNodeEntirelyBeforePosition);
+                if (lastChildOfLastEntireNodeBeforePosition.pos > bestResult.pos) {
+                    bestResult = lastChildOfLastEntireNodeBeforePosition;
+                }
+            }
+            return bestResult;
+            function getLastChild(node) {
+                while (true) {
+                    var lastChild = getLastChildWorker(node);
+                    if (lastChild) {
+                        node = lastChild;
+                    }
+                    else {
+                        return node;
+                    }
+                }
+            }
+            function getLastChildWorker(node) {
+                var last = undefined;
+                forEachChild(node, function (child) {
+                    if (ts.nodeIsPresent(child)) {
+                        last = child;
+                    }
+                });
+                return last;
+            }
+            function visit(child) {
+                if (ts.nodeIsMissing(child)) {
+                    // Missing nodes are effectively invisible to us.  We never even consider them
+                    // When trying to find the nearest node before us.
+                    return;
+                }
+                // If the child intersects this position, then this node is currently the nearest
+                // node that starts before the position.
+                if (child.pos <= position) {
+                    if (child.pos >= bestResult.pos) {
+                        // This node starts before the position, and is closer to the position than
+                        // the previous best node we found.  It is now the new best node.
+                        bestResult = child;
+                    }
+                    // Now, the node may overlap the position, or it may end entirely before the
+                    // position.  If it overlaps with the position, then either it, or one of its
+                    // children must be the nearest node before the position.  So we can just
+                    // recurse into this child to see if we can find something better.
+                    if (position < child.end) {
+                        // The nearest node is either this child, or one of the children inside
+                        // of it.  We've already marked this child as the best so far.  Recurse
+                        // in case one of the children is better.
+                        forEachChild(child, visit);
+                        // Once we look at the children of this node, then there's no need to
+                        // continue any further.
+                        return true;
+                    }
+                    else {
+                        ts.Debug.assert(child.end <= position);
+                        // The child ends entirely before this position.  Say you have the following
+                        // (where $ is the position)
+                        //
+                        //      <complex expr 1> ? <complex expr 2> $ : <...> <...>
+                        //
+                        // We would want to find the nearest preceding node in "complex expr 2".
+                        // To support that, we keep track of this node, and once we're done searching
+                        // for a best node, we recurse down this node to see if we can find a good
+                        // result in it.
+                        //
+                        // This approach allows us to quickly skip over nodes that are entirely
+                        // before the position, while still allowing us to find any nodes in the
+                        // last one that might be what we want.
+                        lastNodeEntirelyBeforePosition = child;
+                    }
+                }
+                else {
+                    ts.Debug.assert(child.pos > position);
+                    // We're now at a node that is entirely past the position we're searching for.
+                    // This node (and all following nodes) could never contribute to the result,
+                    // so just skip them by returning 'true' here.
+                    return true;
+                }
+            }
+        }
+        function checkChangeRange(sourceFile, newText, textChangeRange, aggressiveChecks) {
+            var oldText = sourceFile.text;
+            if (textChangeRange) {
+                ts.Debug.assert((oldText.length - textChangeRange.span.length + textChangeRange.newLength) === newText.length);
+                if (aggressiveChecks || ts.Debug.shouldAssert(3 /* VeryAggressive */)) {
+                    var oldTextPrefix = oldText.substr(0, textChangeRange.span.start);
+                    var newTextPrefix = newText.substr(0, textChangeRange.span.start);
+                    ts.Debug.assert(oldTextPrefix === newTextPrefix);
+                    var oldTextSuffix = oldText.substring(ts.textSpanEnd(textChangeRange.span), oldText.length);
+                    var newTextSuffix = newText.substring(ts.textSpanEnd(ts.textChangeRangeNewSpan(textChangeRange)), newText.length);
+                    ts.Debug.assert(oldTextSuffix === newTextSuffix);
+                }
+            }
+        }
+        function createSyntaxCursor(sourceFile) {
+            var currentArray = sourceFile.statements;
+            var currentArrayIndex = 0;
+            ts.Debug.assert(currentArrayIndex < currentArray.length);
+            var current = currentArray[currentArrayIndex];
+            var lastQueriedPosition = -1 /* Value */;
+            return {
+                currentNode: function (position) {
+                    // Only compute the current node if the position is different than the last time
+                    // we were asked.  The parser commonly asks for the node at the same position
+                    // twice.  Once to know if can read an appropriate list element at a certain point,
+                    // and then to actually read and consume the node.
+                    if (position !== lastQueriedPosition) {
+                        // Much of the time the parser will need the very next node in the array that
+                        // we just returned a node from.So just simply check for that case and move
+                        // forward in the array instead of searching for the node again.
+                        if (current && current.end === position && currentArrayIndex < (currentArray.length - 1)) {
+                            currentArrayIndex++;
+                            current = currentArray[currentArrayIndex];
+                        }
+                        // If we don't have a node, or the node we have isn't in the right position,
+                        // then try to find a viable node at the position requested.
+                        if (!current || current.pos !== position) {
+                            findHighestListElementThatStartsAtPosition(position);
+                        }
+                    }
+                    // Cache this query so that we don't do any extra work if the parser calls back
+                    // into us.  Note: this is very common as the parser will make pairs of calls like
+                    // 'isListElement -> parseListElement'.  If we were unable to find a node when
+                    // called with 'isListElement', we don't want to redo the work when parseListElement
+                    // is called immediately after.
+                    lastQueriedPosition = position;
+                    // Either we don'd have a node, or we have a node at the position being asked for.
+                    ts.Debug.assert(!current || current.pos === position);
+                    return current;
+                }
+            };
+            // Finds the highest element in the tree we can find that starts at the provided position.
+            // The element must be a direct child of some node list in the tree.  This way after we
+            // return it, we can easily return its next sibling in the list.
+            function findHighestListElementThatStartsAtPosition(position) {
+                // Clear out any cached state about the last node we found.
+                currentArray = undefined;
+                currentArrayIndex = -1 /* Value */;
+                current = undefined;
+                // Recurse into the source file to find the highest node at this position.
+                forEachChild(sourceFile, visitNode, visitArray);
+                return;
+                function visitNode(node) {
+                    if (position >= node.pos && position < node.end) {
+                        // Position was within this node.  Keep searching deeper to find the node.
+                        forEachChild(node, visitNode, visitArray);
+                        // don't proceed any further in the search.
+                        return true;
+                    }
+                    // position wasn't in this node, have to keep searching.
+                    return false;
+                }
+                function visitArray(array) {
+                    if (position >= array.pos && position < array.end) {
+                        // position was in this array.  Search through this array to see if we find a
+                        // viable element.
+                        for (var i = 0, n = array.length; i < n; i++) {
+                            var child = array[i];
+                            if (child) {
+                                if (child.pos === position) {
+                                    // Found the right node.  We're done.
+                                    currentArray = array;
+                                    currentArrayIndex = i;
+                                    current = child;
+                                    return true;
+                                }
+                                else {
+                                    if (child.pos < position && position < child.end) {
+                                        // Position in somewhere within this child.  Search in it and
+                                        // stop searching in this array.
+                                        forEachChild(child, visitNode, visitArray);
+                                        return true;
+                                    }
+                                }
+                            }
+                        }
+                    }
+                    // position wasn't in this array, have to keep searching.
+                    return false;
+                }
+            }
+        }
+        var InvalidPosition;
+        (function (InvalidPosition) {
+            InvalidPosition[InvalidPosition["Value"] = -1] = "Value";
+        })(InvalidPosition || (InvalidPosition = {}));
+    })(IncrementalParser || (IncrementalParser = {}));
+})(ts || (ts = {}));
+/// <reference path="utilities.ts"/>
+/// <reference path="parser.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    ts.bindTime = 0;
+    (function (ModuleInstanceState) {
+        ModuleInstanceState[ModuleInstanceState["NonInstantiated"] = 0] = "NonInstantiated";
+        ModuleInstanceState[ModuleInstanceState["Instantiated"] = 1] = "Instantiated";
+        ModuleInstanceState[ModuleInstanceState["ConstEnumOnly"] = 2] = "ConstEnumOnly";
+    })(ts.ModuleInstanceState || (ts.ModuleInstanceState = {}));
+    var ModuleInstanceState = ts.ModuleInstanceState;
+    function getModuleInstanceState(node) {
+        // A module is uninstantiated if it contains only
+        // 1. interface declarations, type alias declarations
+        if (node.kind === 222 /* InterfaceDeclaration */ || node.kind === 223 /* TypeAliasDeclaration */) {
+            return 0 /* NonInstantiated */;
+        }
+        else if (ts.isConstEnumDeclaration(node)) {
+            return 2 /* ConstEnumOnly */;
+        }
+        else if ((node.kind === 230 /* ImportDeclaration */ || node.kind === 229 /* ImportEqualsDeclaration */) && !(node.flags & 1 /* Export */)) {
+            return 0 /* NonInstantiated */;
+        }
+        else if (node.kind === 226 /* ModuleBlock */) {
+            var state_1 = 0 /* NonInstantiated */;
+            ts.forEachChild(node, function (n) {
+                switch (getModuleInstanceState(n)) {
+                    case 0 /* NonInstantiated */:
+                        // child is non-instantiated - continue searching
+                        return false;
+                    case 2 /* ConstEnumOnly */:
+                        // child is const enum only - record state and continue searching
+                        state_1 = 2 /* ConstEnumOnly */;
+                        return false;
+                    case 1 /* Instantiated */:
+                        // child is instantiated - record state and stop
+                        state_1 = 1 /* Instantiated */;
+                        return true;
+                }
+            });
+            return state_1;
+        }
+        else if (node.kind === 225 /* ModuleDeclaration */) {
+            return getModuleInstanceState(node.body);
+        }
+        else {
+            return 1 /* Instantiated */;
+        }
+    }
+    ts.getModuleInstanceState = getModuleInstanceState;
+    var ContainerFlags;
+    (function (ContainerFlags) {
+        // The current node is not a container, and no container manipulation should happen before
+        // recursing into it.
+        ContainerFlags[ContainerFlags["None"] = 0] = "None";
+        // The current node is a container.  It should be set as the current container (and block-
+        // container) before recursing into it.  The current node does not have locals.  Examples:
+        //
+        //      Classes, ObjectLiterals, TypeLiterals, Interfaces...
+        ContainerFlags[ContainerFlags["IsContainer"] = 1] = "IsContainer";
+        // The current node is a block-scoped-container.  It should be set as the current block-
+        // container before recursing into it.  Examples:
+        //
+        //      Blocks (when not parented by functions), Catch clauses, For/For-in/For-of statements...
+        ContainerFlags[ContainerFlags["IsBlockScopedContainer"] = 2] = "IsBlockScopedContainer";
+        // The current node is the container of a control flow path. The current control flow should
+        // be saved and restored, and a new control flow initialized within the container.
+        ContainerFlags[ContainerFlags["IsControlFlowContainer"] = 4] = "IsControlFlowContainer";
+        ContainerFlags[ContainerFlags["IsFunctionLike"] = 8] = "IsFunctionLike";
+        ContainerFlags[ContainerFlags["IsFunctionExpression"] = 16] = "IsFunctionExpression";
+        ContainerFlags[ContainerFlags["HasLocals"] = 32] = "HasLocals";
+        ContainerFlags[ContainerFlags["IsInterface"] = 64] = "IsInterface";
+    })(ContainerFlags || (ContainerFlags = {}));
+    var binder = createBinder();
+    function bindSourceFile(file, options) {
+        var start = new Date().getTime();
+        binder(file, options);
+        ts.bindTime += new Date().getTime() - start;
+    }
+    ts.bindSourceFile = bindSourceFile;
+    function createBinder() {
+        var file;
+        var options;
+        var languageVersion;
+        var parent;
+        var container;
+        var blockScopeContainer;
+        var lastContainer;
+        var seenThisKeyword;
+        // state used by control flow analysis
+        var currentFlow;
+        var currentBreakTarget;
+        var currentContinueTarget;
+        var currentReturnTarget;
+        var currentTrueTarget;
+        var currentFalseTarget;
+        var preSwitchCaseFlow;
+        var activeLabels;
+        var hasExplicitReturn;
+        // state used for emit helpers
+        var emitFlags;
+        // If this file is an external module, then it is automatically in strict-mode according to
+        // ES6.  If it is not an external module, then we'll determine if it is in strict mode or
+        // not depending on if we see "use strict" in certain places (or if we hit a class/namespace).
+        var inStrictMode;
+        var symbolCount = 0;
+        var Symbol;
+        var classifiableNames;
+        var unreachableFlow = { flags: 1 /* Unreachable */ };
+        var reportedUnreachableFlow = { flags: 1 /* Unreachable */ };
+        function bindSourceFile(f, opts) {
+            file = f;
+            options = opts;
+            languageVersion = ts.getEmitScriptTarget(options);
+            inStrictMode = !!file.externalModuleIndicator;
+            classifiableNames = {};
+            symbolCount = 0;
+            Symbol = ts.objectAllocator.getSymbolConstructor();
+            if (!file.locals) {
+                bind(file);
+                file.symbolCount = symbolCount;
+                file.classifiableNames = classifiableNames;
+            }
+            file = undefined;
+            options = undefined;
+            languageVersion = undefined;
+            parent = undefined;
+            container = undefined;
+            blockScopeContainer = undefined;
+            lastContainer = undefined;
+            seenThisKeyword = false;
+            currentFlow = undefined;
+            currentBreakTarget = undefined;
+            currentContinueTarget = undefined;
+            currentReturnTarget = undefined;
+            currentTrueTarget = undefined;
+            currentFalseTarget = undefined;
+            activeLabels = undefined;
+            hasExplicitReturn = false;
+            emitFlags = 0 /* None */;
+        }
+        return bindSourceFile;
+        function createSymbol(flags, name) {
+            symbolCount++;
+            return new Symbol(flags, name);
+        }
+        function addDeclarationToSymbol(symbol, node, symbolFlags) {
+            symbol.flags |= symbolFlags;
+            node.symbol = symbol;
+            if (!symbol.declarations) {
+                symbol.declarations = [];
+            }
+            symbol.declarations.push(node);
+            if (symbolFlags & 1952 /* HasExports */ && !symbol.exports) {
+                symbol.exports = {};
+            }
+            if (symbolFlags & 6240 /* HasMembers */ && !symbol.members) {
+                symbol.members = {};
+            }
+            if (symbolFlags & 107455 /* Value */) {
+                var valueDeclaration = symbol.valueDeclaration;
+                if (!valueDeclaration ||
+                    (valueDeclaration.kind !== node.kind && valueDeclaration.kind === 225 /* ModuleDeclaration */)) {
+                    // other kinds of value declarations take precedence over modules
+                    symbol.valueDeclaration = node;
+                }
+            }
+        }
+        // Should not be called on a declaration with a computed property name,
+        // unless it is a well known Symbol.
+        function getDeclarationName(node) {
+            if (node.name) {
+                if (ts.isAmbientModule(node)) {
+                    return ts.isGlobalScopeAugmentation(node) ? "__global" : "\"" + node.name.text + "\"";
+                }
+                if (node.name.kind === 140 /* ComputedPropertyName */) {
+                    var nameExpression = node.name.expression;
+                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
+                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
+                        return nameExpression.text;
+                    }
+                    ts.Debug.assert(ts.isWellKnownSymbolSyntactically(nameExpression));
+                    return ts.getPropertyNameForKnownSymbolName(nameExpression.name.text);
+                }
+                return node.name.text;
+            }
+            switch (node.kind) {
+                case 148 /* Constructor */:
+                    return "__constructor";
+                case 156 /* FunctionType */:
+                case 151 /* CallSignature */:
+                    return "__call";
+                case 157 /* ConstructorType */:
+                case 152 /* ConstructSignature */:
+                    return "__new";
+                case 153 /* IndexSignature */:
+                    return "__index";
+                case 236 /* ExportDeclaration */:
+                    return "__export";
+                case 235 /* ExportAssignment */:
+                    return node.isExportEquals ? "export=" : "default";
+                case 187 /* BinaryExpression */:
+                    switch (ts.getSpecialPropertyAssignmentKind(node)) {
+                        case 2 /* ModuleExports */:
+                            // module.exports = ...
+                            return "export=";
+                        case 1 /* ExportsProperty */:
+                        case 4 /* ThisProperty */:
+                            // exports.x = ... or this.y = ...
+                            return node.left.name.text;
+                        case 3 /* PrototypeProperty */:
+                            // className.prototype.methodName = ...
+                            return node.left.expression.name.text;
+                    }
+                    ts.Debug.fail("Unknown binary declaration kind");
+                    break;
+                case 220 /* FunctionDeclaration */:
+                case 221 /* ClassDeclaration */:
+                    return node.flags & 512 /* Default */ ? "default" : undefined;
+                case 269 /* JSDocFunctionType */:
+                    return ts.isJSDocConstructSignature(node) ? "__new" : "__call";
+                case 142 /* Parameter */:
+                    // Parameters with names are handled at the top of this function.  Parameters
+                    // without names can only come from JSDocFunctionTypes.
+                    ts.Debug.assert(node.parent.kind === 269 /* JSDocFunctionType */);
+                    var functionType = node.parent;
+                    var index = ts.indexOf(functionType.parameters, node);
+                    return "p" + index;
+                case 279 /* JSDocTypedefTag */:
+                    var parentNode = node.parent && node.parent.parent;
+                    var nameFromParentNode = void 0;
+                    if (parentNode && parentNode.kind === 200 /* VariableStatement */) {
+                        if (parentNode.declarationList.declarations.length > 0) {
+                            var nameIdentifier = parentNode.declarationList.declarations[0].name;
+                            if (nameIdentifier.kind === 69 /* Identifier */) {
+                                nameFromParentNode = nameIdentifier.text;
+                            }
+                        }
+                    }
+                    return nameFromParentNode;
+            }
+        }
+        function getDisplayName(node) {
+            return node.name ? ts.declarationNameToString(node.name) : getDeclarationName(node);
+        }
+        /**
+         * Declares a Symbol for the node and adds it to symbols. Reports errors for conflicting identifier names.
+         * @param symbolTable - The symbol table which node will be added to.
+         * @param parent - node's parent declaration.
+         * @param node - The declaration to be added to the symbol table
+         * @param includes - The SymbolFlags that node has in addition to its declaration type (eg: export, ambient, etc.)
+         * @param excludes - The flags which node cannot be declared alongside in a symbol table. Used to report forbidden declarations.
+         */
+        function declareSymbol(symbolTable, parent, node, includes, excludes) {
+            ts.Debug.assert(!ts.hasDynamicName(node));
+            var isDefaultExport = node.flags & 512 /* Default */;
+            // The exported symbol for an export default function/class node is always named "default"
+            var name = isDefaultExport && parent ? "default" : getDeclarationName(node);
+            var symbol;
+            if (name !== undefined) {
+                // Check and see if the symbol table already has a symbol with this name.  If not,
+                // create a new symbol with this name and add it to the table.  Note that we don't
+                // give the new symbol any flags *yet*.  This ensures that it will not conflict
+                // with the 'excludes' flags we pass in.
+                //
+                // If we do get an existing symbol, see if it conflicts with the new symbol we're
+                // creating.  For example, a 'var' symbol and a 'class' symbol will conflict within
+                // the same symbol table.  If we have a conflict, report the issue on each
+                // declaration we have for this symbol, and then create a new symbol for this
+                // declaration.
+                //
+                // If we created a new symbol, either because we didn't have a symbol with this name
+                // in the symbol table, or we conflicted with an existing symbol, then just add this
+                // node as the sole declaration of the new symbol.
+                //
+                // Otherwise, we'll be merging into a compatible existing symbol (for example when
+                // you have multiple 'vars' with the same name in the same container).  In this case
+                // just add this node into the declarations list of the symbol.
+                symbol = ts.hasProperty(symbolTable, name)
+                    ? symbolTable[name]
+                    : (symbolTable[name] = createSymbol(0 /* None */, name));
+                if (name && (includes & 788448 /* Classifiable */)) {
+                    classifiableNames[name] = name;
+                }
+                if (symbol.flags & excludes) {
+                    if (node.name) {
+                        node.name.parent = node;
+                    }
+                    // Report errors every position with duplicate declaration
+                    // Report errors on previous encountered declarations
+                    var message_1 = symbol.flags & 2 /* BlockScopedVariable */
+                        ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0
+                        : ts.Diagnostics.Duplicate_identifier_0;
+                    ts.forEach(symbol.declarations, function (declaration) {
+                        if (declaration.flags & 512 /* Default */) {
+                            message_1 = ts.Diagnostics.A_module_cannot_have_multiple_default_exports;
+                        }
+                    });
+                    ts.forEach(symbol.declarations, function (declaration) {
+                        file.bindDiagnostics.push(ts.createDiagnosticForNode(declaration.name || declaration, message_1, getDisplayName(declaration)));
+                    });
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node.name || node, message_1, getDisplayName(node)));
+                    symbol = createSymbol(0 /* None */, name);
+                }
+            }
+            else {
+                symbol = createSymbol(0 /* None */, "__missing");
+            }
+            addDeclarationToSymbol(symbol, node, includes);
+            symbol.parent = parent;
+            return symbol;
+        }
+        function declareModuleMember(node, symbolFlags, symbolExcludes) {
+            var hasExportModifier = ts.getCombinedNodeFlags(node) & 1 /* Export */;
+            if (symbolFlags & 8388608 /* Alias */) {
+                if (node.kind === 238 /* ExportSpecifier */ || (node.kind === 229 /* ImportEqualsDeclaration */ && hasExportModifier)) {
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                }
+                else {
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                }
+            }
+            else {
+                // Exported module members are given 2 symbols: A local symbol that is classified with an ExportValue,
+                // ExportType, or ExportContainer flag, and an associated export symbol with all the correct flags set
+                // on it. There are 2 main reasons:
+                //
+                //   1. We treat locals and exports of the same name as mutually exclusive within a container.
+                //      That means the binder will issue a Duplicate Identifier error if you mix locals and exports
+                //      with the same name in the same container.
+                //      TODO: Make this a more specific error and decouple it from the exclusion logic.
+                //   2. When we checkIdentifier in the checker, we set its resolved symbol to the local symbol,
+                //      but return the export symbol (by calling getExportSymbolOfValueSymbolIfExported). That way
+                //      when the emitter comes back to it, it knows not to qualify the name if it was found in a containing scope.
+                // NOTE: Nested ambient modules always should go to to 'locals' table to prevent their automatic merge
+                //       during global merging in the checker. Why? The only case when ambient module is permitted inside another module is module augmentation
+                //       and this case is specially handled. Module augmentations should only be merged with original module definition
+                //       and should never be merged directly with other augmentation, and the latter case would be possible if automatic merge is allowed.
+                if (!ts.isAmbientModule(node) && (hasExportModifier || container.flags & 8192 /* ExportContext */)) {
+                    var exportKind = (symbolFlags & 107455 /* Value */ ? 1048576 /* ExportValue */ : 0) |
+                        (symbolFlags & 793056 /* Type */ ? 2097152 /* ExportType */ : 0) |
+                        (symbolFlags & 1536 /* Namespace */ ? 4194304 /* ExportNamespace */ : 0);
+                    var local = declareSymbol(container.locals, undefined, node, exportKind, symbolExcludes);
+                    local.exportSymbol = declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                    node.localSymbol = local;
+                    return local;
+                }
+                else {
+                    return declareSymbol(container.locals, undefined, node, symbolFlags, symbolExcludes);
+                }
+            }
+        }
+        // All container nodes are kept on a linked list in declaration order. This list is used by
+        // the getLocalNameOfContainer function in the type checker to validate that the local name
+        // used for a container is unique.
+        function bindContainer(node, containerFlags) {
+            // Before we recurse into a node's children, we first save the existing parent, container
+            // and block-container.  Then after we pop out of processing the children, we restore
+            // these saved values.
+            var saveContainer = container;
+            var savedBlockScopeContainer = blockScopeContainer;
+            // Depending on what kind of node this is, we may have to adjust the current container
+            // and block-container.   If the current node is a container, then it is automatically
+            // considered the current block-container as well.  Also, for containers that we know
+            // may contain locals, we proactively initialize the .locals field. We do this because
+            // it's highly likely that the .locals will be needed to place some child in (for example,
+            // a parameter, or variable declaration).
+            //
+            // However, we do not proactively create the .locals for block-containers because it's
+            // totally normal and common for block-containers to never actually have a block-scoped
+            // variable in them.  We don't want to end up allocating an object for every 'block' we
+            // run into when most of them won't be necessary.
+            //
+            // Finally, if this is a block-container, then we clear out any existing .locals object
+            // it may contain within it.  This happens in incremental scenarios.  Because we can be
+            // reusing a node from a previous compilation, that node may have had 'locals' created
+            // for it.  We must clear this so we don't accidentally move any stale data forward from
+            // a previous compilation.
+            if (containerFlags & 1 /* IsContainer */) {
+                container = blockScopeContainer = node;
+                if (containerFlags & 32 /* HasLocals */) {
+                    container.locals = {};
+                }
+                addToContainerChain(container);
+            }
+            else if (containerFlags & 2 /* IsBlockScopedContainer */) {
+                blockScopeContainer = node;
+                blockScopeContainer.locals = undefined;
+            }
+            if (containerFlags & 4 /* IsControlFlowContainer */) {
+                var saveCurrentFlow = currentFlow;
+                var saveBreakTarget = currentBreakTarget;
+                var saveContinueTarget = currentContinueTarget;
+                var saveReturnTarget = currentReturnTarget;
+                var saveActiveLabels = activeLabels;
+                var saveHasExplicitReturn = hasExplicitReturn;
+                var isIIFE = containerFlags & 16 /* IsFunctionExpression */ && !!ts.getImmediatelyInvokedFunctionExpression(node);
+                // An IIFE is considered part of the containing control flow. Return statements behave
+                // similarly to break statements that exit to a label just past the statement body.
+                if (isIIFE) {
+                    currentReturnTarget = createBranchLabel();
+                }
+                else {
+                    currentFlow = { flags: 2 /* Start */ };
+                    if (containerFlags & 16 /* IsFunctionExpression */) {
+                        currentFlow.container = node;
+                    }
+                    currentReturnTarget = undefined;
+                }
+                currentBreakTarget = undefined;
+                currentContinueTarget = undefined;
+                activeLabels = undefined;
+                hasExplicitReturn = false;
+                bindChildren(node);
+                // Reset all reachability check related flags on node (for incremental scenarios)
+                // Reset all emit helper flags on node (for incremental scenarios)
+                node.flags &= ~4030464 /* ReachabilityAndEmitFlags */;
+                if (!(currentFlow.flags & 1 /* Unreachable */) && containerFlags & 8 /* IsFunctionLike */ && ts.nodeIsPresent(node.body)) {
+                    node.flags |= 32768 /* HasImplicitReturn */;
+                    if (hasExplicitReturn)
+                        node.flags |= 65536 /* HasExplicitReturn */;
+                }
+                if (node.kind === 256 /* SourceFile */) {
+                    node.flags |= emitFlags;
+                }
+                if (isIIFE) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                    currentFlow = finishFlowLabel(currentReturnTarget);
+                }
+                else {
+                    currentFlow = saveCurrentFlow;
+                }
+                currentBreakTarget = saveBreakTarget;
+                currentContinueTarget = saveContinueTarget;
+                currentReturnTarget = saveReturnTarget;
+                activeLabels = saveActiveLabels;
+                hasExplicitReturn = saveHasExplicitReturn;
+            }
+            else if (containerFlags & 64 /* IsInterface */) {
+                seenThisKeyword = false;
+                bindChildren(node);
+                node.flags = seenThisKeyword ? node.flags | 16384 /* ContainsThis */ : node.flags & ~16384 /* ContainsThis */;
+            }
+            else {
+                bindChildren(node);
+            }
+            container = saveContainer;
+            blockScopeContainer = savedBlockScopeContainer;
+        }
+        function bindChildren(node) {
+            // Binding of JsDocComment should be done before the current block scope container changes.
+            // because the scope of JsDocComment should not be affected by whether the current node is a
+            // container or not.
+            if (ts.isInJavaScriptFile(node) && node.jsDocComments) {
+                for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                    var jsDocComment = _a[_i];
+                    bind(jsDocComment);
+                }
+            }
+            if (checkUnreachable(node)) {
+                ts.forEachChild(node, bind);
+                return;
+            }
+            switch (node.kind) {
+                case 205 /* WhileStatement */:
+                    bindWhileStatement(node);
+                    break;
+                case 204 /* DoStatement */:
+                    bindDoStatement(node);
+                    break;
+                case 206 /* ForStatement */:
+                    bindForStatement(node);
+                    break;
+                case 207 /* ForInStatement */:
+                case 208 /* ForOfStatement */:
+                    bindForInOrForOfStatement(node);
+                    break;
+                case 203 /* IfStatement */:
+                    bindIfStatement(node);
+                    break;
+                case 211 /* ReturnStatement */:
+                case 215 /* ThrowStatement */:
+                    bindReturnOrThrow(node);
+                    break;
+                case 210 /* BreakStatement */:
+                case 209 /* ContinueStatement */:
+                    bindBreakOrContinueStatement(node);
+                    break;
+                case 216 /* TryStatement */:
+                    bindTryStatement(node);
+                    break;
+                case 213 /* SwitchStatement */:
+                    bindSwitchStatement(node);
+                    break;
+                case 227 /* CaseBlock */:
+                    bindCaseBlock(node);
+                    break;
+                case 214 /* LabeledStatement */:
+                    bindLabeledStatement(node);
+                    break;
+                case 185 /* PrefixUnaryExpression */:
+                    bindPrefixUnaryExpressionFlow(node);
+                    break;
+                case 187 /* BinaryExpression */:
+                    bindBinaryExpressionFlow(node);
+                    break;
+                case 181 /* DeleteExpression */:
+                    bindDeleteExpressionFlow(node);
+                    break;
+                case 188 /* ConditionalExpression */:
+                    bindConditionalExpressionFlow(node);
+                    break;
+                case 218 /* VariableDeclaration */:
+                    bindVariableDeclarationFlow(node);
+                    break;
+                case 174 /* CallExpression */:
+                    bindCallExpressionFlow(node);
+                    break;
+                default:
+                    ts.forEachChild(node, bind);
+                    break;
+            }
+        }
+        function isNarrowableReference(expr) {
+            return expr.kind === 69 /* Identifier */ ||
+                expr.kind === 97 /* ThisKeyword */ ||
+                expr.kind === 172 /* PropertyAccessExpression */ && isNarrowableReference(expr.expression);
+        }
+        function isNarrowingExpression(expr) {
+            switch (expr.kind) {
+                case 69 /* Identifier */:
+                case 97 /* ThisKeyword */:
+                case 172 /* PropertyAccessExpression */:
+                    return isNarrowableReference(expr);
+                case 174 /* CallExpression */:
+                    return true;
+                case 178 /* ParenthesizedExpression */:
+                    return isNarrowingExpression(expr.expression);
+                case 187 /* BinaryExpression */:
+                    return isNarrowingBinaryExpression(expr);
+                case 185 /* PrefixUnaryExpression */:
+                    return expr.operator === 49 /* ExclamationToken */ && isNarrowingExpression(expr.operand);
+            }
+            return false;
+        }
+        function isNarrowingBinaryExpression(expr) {
+            switch (expr.operatorToken.kind) {
+                case 56 /* EqualsToken */:
+                    return isNarrowableReference(expr.left);
+                case 30 /* EqualsEqualsToken */:
+                case 31 /* ExclamationEqualsToken */:
+                case 32 /* EqualsEqualsEqualsToken */:
+                case 33 /* ExclamationEqualsEqualsToken */:
+                    if (isNarrowingExpression(expr.left) && (expr.right.kind === 93 /* NullKeyword */ || expr.right.kind === 69 /* Identifier */)) {
+                        return true;
+                    }
+                    if (expr.left.kind === 182 /* TypeOfExpression */ && isNarrowingExpression(expr.left.expression) && expr.right.kind === 9 /* StringLiteral */) {
+                        return true;
+                    }
+                    return false;
+                case 91 /* InstanceOfKeyword */:
+                    return isNarrowingExpression(expr.left);
+                case 24 /* CommaToken */:
+                    return isNarrowingExpression(expr.right);
+            }
+            return false;
+        }
+        function createBranchLabel() {
+            return {
+                flags: 4 /* BranchLabel */,
+                antecedents: undefined
+            };
+        }
+        function createLoopLabel() {
+            return {
+                flags: 8 /* LoopLabel */,
+                antecedents: undefined
+            };
+        }
+        function setFlowNodeReferenced(flow) {
+            // On first reference we set the Referenced flag, thereafter we set the Shared flag
+            flow.flags |= flow.flags & 128 /* Referenced */ ? 256 /* Shared */ : 128 /* Referenced */;
+        }
+        function addAntecedent(label, antecedent) {
+            if (!(antecedent.flags & 1 /* Unreachable */) && !ts.contains(label.antecedents, antecedent)) {
+                (label.antecedents || (label.antecedents = [])).push(antecedent);
+                setFlowNodeReferenced(antecedent);
+            }
+        }
+        function createFlowCondition(flags, antecedent, expression) {
+            if (antecedent.flags & 1 /* Unreachable */) {
+                return antecedent;
+            }
+            if (!expression) {
+                return flags & 32 /* TrueCondition */ ? antecedent : unreachableFlow;
+            }
+            if (expression.kind === 99 /* TrueKeyword */ && flags & 64 /* FalseCondition */ ||
+                expression.kind === 84 /* FalseKeyword */ && flags & 32 /* TrueCondition */) {
+                return unreachableFlow;
+            }
+            if (!isNarrowingExpression(expression)) {
+                return antecedent;
+            }
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: flags,
+                antecedent: antecedent,
+                expression: expression
+            };
+        }
+        function createFlowAssignment(antecedent, node) {
+            setFlowNodeReferenced(antecedent);
+            return {
+                flags: 16 /* Assignment */,
+                antecedent: antecedent,
+                node: node
+            };
+        }
+        function finishFlowLabel(flow) {
+            var antecedents = flow.antecedents;
+            if (!antecedents) {
+                return unreachableFlow;
+            }
+            if (antecedents.length === 1) {
+                return antecedents[0];
+            }
+            return flow;
+        }
+        function isStatementCondition(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 203 /* IfStatement */:
+                case 205 /* WhileStatement */:
+                case 204 /* DoStatement */:
+                    return parent.expression === node;
+                case 206 /* ForStatement */:
+                case 188 /* ConditionalExpression */:
+                    return parent.condition === node;
+            }
+            return false;
+        }
+        function isLogicalExpression(node) {
+            while (true) {
+                if (node.kind === 178 /* ParenthesizedExpression */) {
+                    node = node.expression;
+                }
+                else if (node.kind === 185 /* PrefixUnaryExpression */ && node.operator === 49 /* ExclamationToken */) {
+                    node = node.operand;
+                }
+                else {
+                    return node.kind === 187 /* BinaryExpression */ && (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */ ||
+                        node.operatorToken.kind === 52 /* BarBarToken */);
+                }
+            }
+        }
+        function isTopLevelLogicalExpression(node) {
+            while (node.parent.kind === 178 /* ParenthesizedExpression */ ||
+                node.parent.kind === 185 /* PrefixUnaryExpression */ &&
+                    node.parent.operator === 49 /* ExclamationToken */) {
+                node = node.parent;
+            }
+            return !isStatementCondition(node) && !isLogicalExpression(node.parent);
+        }
+        function bindCondition(node, trueTarget, falseTarget) {
+            var saveTrueTarget = currentTrueTarget;
+            var saveFalseTarget = currentFalseTarget;
+            currentTrueTarget = trueTarget;
+            currentFalseTarget = falseTarget;
+            bind(node);
+            currentTrueTarget = saveTrueTarget;
+            currentFalseTarget = saveFalseTarget;
+            if (!node || !isLogicalExpression(node)) {
+                addAntecedent(trueTarget, createFlowCondition(32 /* TrueCondition */, currentFlow, node));
+                addAntecedent(falseTarget, createFlowCondition(64 /* FalseCondition */, currentFlow, node));
+            }
+        }
+        function bindIterativeStatement(node, breakTarget, continueTarget) {
+            var saveBreakTarget = currentBreakTarget;
+            var saveContinueTarget = currentContinueTarget;
+            currentBreakTarget = breakTarget;
+            currentContinueTarget = continueTarget;
+            bind(node);
+            currentBreakTarget = saveBreakTarget;
+            currentContinueTarget = saveContinueTarget;
+        }
+        function bindWhileStatement(node) {
+            var preWhileLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postWhileLabel = createBranchLabel();
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = preWhileLabel;
+            bindCondition(node.expression, preBodyLabel, postWhileLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postWhileLabel, preWhileLabel);
+            addAntecedent(preWhileLabel, currentFlow);
+            currentFlow = finishFlowLabel(postWhileLabel);
+        }
+        function bindDoStatement(node) {
+            var preDoLabel = createLoopLabel();
+            var preConditionLabel = createBranchLabel();
+            var postDoLabel = createBranchLabel();
+            addAntecedent(preDoLabel, currentFlow);
+            currentFlow = preDoLabel;
+            bindIterativeStatement(node.statement, postDoLabel, preConditionLabel);
+            addAntecedent(preConditionLabel, currentFlow);
+            currentFlow = finishFlowLabel(preConditionLabel);
+            bindCondition(node.expression, preDoLabel, postDoLabel);
+            currentFlow = finishFlowLabel(postDoLabel);
+        }
+        function bindForStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var preBodyLabel = createBranchLabel();
+            var postLoopLabel = createBranchLabel();
+            bind(node.initializer);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            bindCondition(node.condition, preBodyLabel, postLoopLabel);
+            currentFlow = finishFlowLabel(preBodyLabel);
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            bind(node.incrementor);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
+        }
+        function bindForInOrForOfStatement(node) {
+            var preLoopLabel = createLoopLabel();
+            var postLoopLabel = createBranchLabel();
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = preLoopLabel;
+            bind(node.expression);
+            addAntecedent(postLoopLabel, currentFlow);
+            bind(node.initializer);
+            if (node.initializer.kind !== 219 /* VariableDeclarationList */) {
+                bindAssignmentTargetFlow(node.initializer);
+            }
+            bindIterativeStatement(node.statement, postLoopLabel, preLoopLabel);
+            addAntecedent(preLoopLabel, currentFlow);
+            currentFlow = finishFlowLabel(postLoopLabel);
+        }
+        function bindIfStatement(node) {
+            var thenLabel = createBranchLabel();
+            var elseLabel = createBranchLabel();
+            var postIfLabel = createBranchLabel();
+            bindCondition(node.expression, thenLabel, elseLabel);
+            currentFlow = finishFlowLabel(thenLabel);
+            bind(node.thenStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(elseLabel);
+            bind(node.elseStatement);
+            addAntecedent(postIfLabel, currentFlow);
+            currentFlow = finishFlowLabel(postIfLabel);
+        }
+        function bindReturnOrThrow(node) {
+            bind(node.expression);
+            if (node.kind === 211 /* ReturnStatement */) {
+                hasExplicitReturn = true;
+                if (currentReturnTarget) {
+                    addAntecedent(currentReturnTarget, currentFlow);
+                }
+            }
+            currentFlow = unreachableFlow;
+        }
+        function findActiveLabel(name) {
+            if (activeLabels) {
+                for (var _i = 0, activeLabels_1 = activeLabels; _i < activeLabels_1.length; _i++) {
+                    var label = activeLabels_1[_i];
+                    if (label.name === name) {
+                        return label;
+                    }
+                }
+            }
+            return undefined;
+        }
+        function bindbreakOrContinueFlow(node, breakTarget, continueTarget) {
+            var flowLabel = node.kind === 210 /* BreakStatement */ ? breakTarget : continueTarget;
+            if (flowLabel) {
+                addAntecedent(flowLabel, currentFlow);
+                currentFlow = unreachableFlow;
+            }
+        }
+        function bindBreakOrContinueStatement(node) {
+            bind(node.label);
+            if (node.label) {
+                var activeLabel = findActiveLabel(node.label.text);
+                if (activeLabel) {
+                    activeLabel.referenced = true;
+                    bindbreakOrContinueFlow(node, activeLabel.breakTarget, activeLabel.continueTarget);
+                }
+            }
+            else {
+                bindbreakOrContinueFlow(node, currentBreakTarget, currentContinueTarget);
+            }
+        }
+        function bindTryStatement(node) {
+            var postFinallyLabel = createBranchLabel();
+            var preTryFlow = currentFlow;
+            // TODO: Every statement in try block is potentially an exit point!
+            bind(node.tryBlock);
+            addAntecedent(postFinallyLabel, currentFlow);
+            if (node.catchClause) {
+                currentFlow = preTryFlow;
+                bind(node.catchClause);
+                addAntecedent(postFinallyLabel, currentFlow);
+            }
+            if (node.finallyBlock) {
+                currentFlow = preTryFlow;
+                bind(node.finallyBlock);
+            }
+            currentFlow = finishFlowLabel(postFinallyLabel);
+        }
+        function bindSwitchStatement(node) {
+            var postSwitchLabel = createBranchLabel();
+            bind(node.expression);
+            var saveBreakTarget = currentBreakTarget;
+            var savePreSwitchCaseFlow = preSwitchCaseFlow;
+            currentBreakTarget = postSwitchLabel;
+            preSwitchCaseFlow = currentFlow;
+            bind(node.caseBlock);
+            addAntecedent(postSwitchLabel, currentFlow);
+            var hasNonEmptyDefault = ts.forEach(node.caseBlock.clauses, function (c) { return c.kind === 250 /* DefaultClause */ && c.statements.length; });
+            if (!hasNonEmptyDefault) {
+                addAntecedent(postSwitchLabel, preSwitchCaseFlow);
+            }
+            currentBreakTarget = saveBreakTarget;
+            preSwitchCaseFlow = savePreSwitchCaseFlow;
+            currentFlow = finishFlowLabel(postSwitchLabel);
+        }
+        function bindCaseBlock(node) {
+            var clauses = node.clauses;
+            for (var i = 0; i < clauses.length; i++) {
+                var clause = clauses[i];
+                if (clause.statements.length) {
+                    if (currentFlow.flags & 1 /* Unreachable */) {
+                        currentFlow = preSwitchCaseFlow;
+                    }
+                    else {
+                        var preCaseLabel = createBranchLabel();
+                        addAntecedent(preCaseLabel, preSwitchCaseFlow);
+                        addAntecedent(preCaseLabel, currentFlow);
+                        currentFlow = finishFlowLabel(preCaseLabel);
+                    }
+                    bind(clause);
+                    if (!(currentFlow.flags & 1 /* Unreachable */) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
+                        errorOnFirstToken(clause, ts.Diagnostics.Fallthrough_case_in_switch);
+                    }
+                }
+                else {
+                    bind(clause);
+                }
+            }
+        }
+        function pushActiveLabel(name, breakTarget, continueTarget) {
+            var activeLabel = {
+                name: name,
+                breakTarget: breakTarget,
+                continueTarget: continueTarget,
+                referenced: false
+            };
+            (activeLabels || (activeLabels = [])).push(activeLabel);
+            return activeLabel;
+        }
+        function popActiveLabel() {
+            activeLabels.pop();
+        }
+        function bindLabeledStatement(node) {
+            var preStatementLabel = createLoopLabel();
+            var postStatementLabel = createBranchLabel();
+            bind(node.label);
+            addAntecedent(preStatementLabel, currentFlow);
+            var activeLabel = pushActiveLabel(node.label.text, postStatementLabel, preStatementLabel);
+            bind(node.statement);
+            popActiveLabel();
+            if (!activeLabel.referenced && !options.allowUnusedLabels) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node.label, ts.Diagnostics.Unused_label));
+            }
+            addAntecedent(postStatementLabel, currentFlow);
+            currentFlow = finishFlowLabel(postStatementLabel);
+        }
+        function bindDestructuringTargetFlow(node) {
+            if (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 56 /* EqualsToken */) {
+                bindAssignmentTargetFlow(node.left);
+            }
+            else {
+                bindAssignmentTargetFlow(node);
+            }
+        }
+        function bindAssignmentTargetFlow(node) {
+            if (isNarrowableReference(node)) {
+                currentFlow = createFlowAssignment(currentFlow, node);
+            }
+            else if (node.kind === 170 /* ArrayLiteralExpression */) {
+                for (var _i = 0, _a = node.elements; _i < _a.length; _i++) {
+                    var e = _a[_i];
+                    if (e.kind === 191 /* SpreadElementExpression */) {
+                        bindAssignmentTargetFlow(e.expression);
+                    }
+                    else {
+                        bindDestructuringTargetFlow(e);
+                    }
+                }
+            }
+            else if (node.kind === 171 /* ObjectLiteralExpression */) {
+                for (var _b = 0, _c = node.properties; _b < _c.length; _b++) {
+                    var p = _c[_b];
+                    if (p.kind === 253 /* PropertyAssignment */) {
+                        bindDestructuringTargetFlow(p.initializer);
+                    }
+                    else if (p.kind === 254 /* ShorthandPropertyAssignment */) {
+                        bindAssignmentTargetFlow(p.name);
+                    }
+                }
+            }
+        }
+        function bindLogicalExpression(node, trueTarget, falseTarget) {
+            var preRightLabel = createBranchLabel();
+            if (node.operatorToken.kind === 51 /* AmpersandAmpersandToken */) {
+                bindCondition(node.left, preRightLabel, falseTarget);
+            }
+            else {
+                bindCondition(node.left, trueTarget, preRightLabel);
+            }
+            currentFlow = finishFlowLabel(preRightLabel);
+            bind(node.operatorToken);
+            bindCondition(node.right, trueTarget, falseTarget);
+        }
+        function bindPrefixUnaryExpressionFlow(node) {
+            if (node.operator === 49 /* ExclamationToken */) {
+                var saveTrueTarget = currentTrueTarget;
+                currentTrueTarget = currentFalseTarget;
+                currentFalseTarget = saveTrueTarget;
+                ts.forEachChild(node, bind);
+                currentFalseTarget = currentTrueTarget;
+                currentTrueTarget = saveTrueTarget;
+            }
+            else {
+                ts.forEachChild(node, bind);
+            }
+        }
+        function bindBinaryExpressionFlow(node) {
+            var operator = node.operatorToken.kind;
+            if (operator === 51 /* AmpersandAmpersandToken */ || operator === 52 /* BarBarToken */) {
+                if (isTopLevelLogicalExpression(node)) {
+                    var postExpressionLabel = createBranchLabel();
+                    bindLogicalExpression(node, postExpressionLabel, postExpressionLabel);
+                    currentFlow = finishFlowLabel(postExpressionLabel);
+                }
+                else {
+                    bindLogicalExpression(node, currentTrueTarget, currentFalseTarget);
+                }
+            }
+            else {
+                ts.forEachChild(node, bind);
+                if (operator === 56 /* EqualsToken */ && !ts.isAssignmentTarget(node)) {
+                    bindAssignmentTargetFlow(node.left);
+                }
+            }
+        }
+        function bindDeleteExpressionFlow(node) {
+            ts.forEachChild(node, bind);
+            if (node.expression.kind === 172 /* PropertyAccessExpression */) {
+                bindAssignmentTargetFlow(node.expression);
+            }
+        }
+        function bindConditionalExpressionFlow(node) {
+            var trueLabel = createBranchLabel();
+            var falseLabel = createBranchLabel();
+            var postExpressionLabel = createBranchLabel();
+            bindCondition(node.condition, trueLabel, falseLabel);
+            currentFlow = finishFlowLabel(trueLabel);
+            bind(node.whenTrue);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(falseLabel);
+            bind(node.whenFalse);
+            addAntecedent(postExpressionLabel, currentFlow);
+            currentFlow = finishFlowLabel(postExpressionLabel);
+        }
+        function bindInitializedVariableFlow(node) {
+            var name = node.name;
+            if (ts.isBindingPattern(name)) {
+                for (var _i = 0, _a = name.elements; _i < _a.length; _i++) {
+                    var child = _a[_i];
+                    bindInitializedVariableFlow(child);
+                }
+            }
+            else {
+                currentFlow = createFlowAssignment(currentFlow, node);
+            }
+        }
+        function bindVariableDeclarationFlow(node) {
+            ts.forEachChild(node, bind);
+            if (node.initializer || node.parent.parent.kind === 207 /* ForInStatement */ || node.parent.parent.kind === 208 /* ForOfStatement */) {
+                bindInitializedVariableFlow(node);
+            }
+        }
+        function bindCallExpressionFlow(node) {
+            // If the target of the call expression is a function expression or arrow function we have
+            // an immediately invoked function expression (IIFE). Initialize the flowNode property to
+            // the current control flow (which includes evaluation of the IIFE arguments).
+            var expr = node.expression;
+            while (expr.kind === 178 /* ParenthesizedExpression */) {
+                expr = expr.expression;
+            }
+            if (expr.kind === 179 /* FunctionExpression */ || expr.kind === 180 /* ArrowFunction */) {
+                ts.forEach(node.typeArguments, bind);
+                ts.forEach(node.arguments, bind);
+                bind(node.expression);
+            }
+            else {
+                ts.forEachChild(node, bind);
+            }
+        }
+        function getContainerFlags(node) {
+            switch (node.kind) {
+                case 192 /* ClassExpression */:
+                case 221 /* ClassDeclaration */:
+                case 224 /* EnumDeclaration */:
+                case 171 /* ObjectLiteralExpression */:
+                case 159 /* TypeLiteral */:
+                case 281 /* JSDocTypeLiteral */:
+                case 265 /* JSDocRecordType */:
+                    return 1 /* IsContainer */;
+                case 222 /* InterfaceDeclaration */:
+                    return 1 /* IsContainer */ | 64 /* IsInterface */;
+                case 269 /* JSDocFunctionType */:
+                case 225 /* ModuleDeclaration */:
+                case 223 /* TypeAliasDeclaration */:
+                    return 1 /* IsContainer */ | 32 /* HasLocals */;
+                case 256 /* SourceFile */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */;
+                case 148 /* Constructor */:
+                case 220 /* FunctionDeclaration */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 151 /* CallSignature */:
+                case 152 /* ConstructSignature */:
+                case 153 /* IndexSignature */:
+                case 156 /* FunctionType */:
+                case 157 /* ConstructorType */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */;
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    return 1 /* IsContainer */ | 4 /* IsControlFlowContainer */ | 32 /* HasLocals */ | 8 /* IsFunctionLike */ | 16 /* IsFunctionExpression */;
+                case 226 /* ModuleBlock */:
+                    return 4 /* IsControlFlowContainer */;
+                case 145 /* PropertyDeclaration */:
+                    return node.initializer ? 4 /* IsControlFlowContainer */ : 0;
+                case 252 /* CatchClause */:
+                case 206 /* ForStatement */:
+                case 207 /* ForInStatement */:
+                case 208 /* ForOfStatement */:
+                case 227 /* CaseBlock */:
+                    return 2 /* IsBlockScopedContainer */;
+                case 199 /* Block */:
+                    // do not treat blocks directly inside a function as a block-scoped-container.
+                    // Locals that reside in this block should go to the function locals. Otherwise 'x'
+                    // would not appear to be a redeclaration of a block scoped local in the following
+                    // example:
+                    //
+                    //      function foo() {
+                    //          var x;
+                    //          let x;
+                    //      }
+                    //
+                    // If we placed 'var x' into the function locals and 'let x' into the locals of
+                    // the block, then there would be no collision.
+                    //
+                    // By not creating a new block-scoped-container here, we ensure that both 'var x'
+                    // and 'let x' go into the Function-container's locals, and we do get a collision
+                    // conflict.
+                    return ts.isFunctionLike(node.parent) ? 0 /* None */ : 2 /* IsBlockScopedContainer */;
+            }
+            return 0 /* None */;
+        }
+        function addToContainerChain(next) {
+            if (lastContainer) {
+                lastContainer.nextContainer = next;
+            }
+            lastContainer = next;
+        }
+        function declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes) {
+            // Just call this directly so that the return type of this function stays "void".
+            return declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes);
+        }
+        function declareSymbolAndAddToSymbolTableWorker(node, symbolFlags, symbolExcludes) {
+            switch (container.kind) {
+                // Modules, source files, and classes need specialized handling for how their
+                // members are declared (for example, a member of a class will go into a specific
+                // symbol table depending on if it is static or not). We defer to specialized
+                // handlers to take care of declaring these child members.
+                case 225 /* ModuleDeclaration */:
+                    return declareModuleMember(node, symbolFlags, symbolExcludes);
+                case 256 /* SourceFile */:
+                    return declareSourceFileMember(node, symbolFlags, symbolExcludes);
+                case 192 /* ClassExpression */:
+                case 221 /* ClassDeclaration */:
+                    return declareClassMember(node, symbolFlags, symbolExcludes);
+                case 224 /* EnumDeclaration */:
+                    return declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes);
+                case 159 /* TypeLiteral */:
+                case 171 /* ObjectLiteralExpression */:
+                case 222 /* InterfaceDeclaration */:
+                case 265 /* JSDocRecordType */:
+                case 281 /* JSDocTypeLiteral */:
+                    // Interface/Object-types always have their children added to the 'members' of
+                    // their container. They are only accessible through an instance of their
+                    // container, and are never in scope otherwise (even inside the body of the
+                    // object / type / interface declaring them). An exception is type parameters,
+                    // which are in scope without qualification (similar to 'locals').
+                    return declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+                case 156 /* FunctionType */:
+                case 157 /* ConstructorType */:
+                case 151 /* CallSignature */:
+                case 152 /* ConstructSignature */:
+                case 153 /* IndexSignature */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 148 /* Constructor */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                case 269 /* JSDocFunctionType */:
+                case 223 /* TypeAliasDeclaration */:
+                    // All the children of these container types are never visible through another
+                    // symbol (i.e. through another symbol's 'exports' or 'members').  Instead,
+                    // they're only accessed 'lexically' (i.e. from code that exists underneath
+                    // their container in the tree.  To accomplish this, we simply add their declared
+                    // symbol to the 'locals' of the container.  These symbols can then be found as
+                    // the type checker walks up the containers, checking them for matching names.
+                    return declareSymbol(container.locals, /*parent*/ undefined, node, symbolFlags, symbolExcludes);
+            }
+        }
+        function declareClassMember(node, symbolFlags, symbolExcludes) {
+            return node.flags & 32 /* Static */
+                ? declareSymbol(container.symbol.exports, container.symbol, node, symbolFlags, symbolExcludes)
+                : declareSymbol(container.symbol.members, container.symbol, node, symbolFlags, symbolExcludes);
+        }
+        function declareSourceFileMember(node, symbolFlags, symbolExcludes) {
+            return ts.isExternalModule(file)
+                ? declareModuleMember(node, symbolFlags, symbolExcludes)
+                : declareSymbol(file.locals, undefined, node, symbolFlags, symbolExcludes);
+        }
+        function hasExportDeclarations(node) {
+            var body = node.kind === 256 /* SourceFile */ ? node : node.body;
+            if (body.kind === 256 /* SourceFile */ || body.kind === 226 /* ModuleBlock */) {
+                for (var _i = 0, _a = body.statements; _i < _a.length; _i++) {
+                    var stat = _a[_i];
+                    if (stat.kind === 236 /* ExportDeclaration */ || stat.kind === 235 /* ExportAssignment */) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function setExportContextFlag(node) {
+            // A declaration source file or ambient module declaration that contains no export declarations (but possibly regular
+            // declarations with export modifiers) is an export context in which declarations are implicitly exported.
+            if (ts.isInAmbientContext(node) && !hasExportDeclarations(node)) {
+                node.flags |= 8192 /* ExportContext */;
+            }
+            else {
+                node.flags &= ~8192 /* ExportContext */;
+            }
+        }
+        function bindModuleDeclaration(node) {
+            setExportContextFlag(node);
+            if (ts.isAmbientModule(node)) {
+                if (node.flags & 1 /* Export */) {
+                    errorOnFirstToken(node, ts.Diagnostics.export_modifier_cannot_be_applied_to_ambient_modules_and_module_augmentations_since_they_are_always_visible);
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    declareSymbolAndAddToSymbolTable(node, 1024 /* NamespaceModule */, 0 /* NamespaceModuleExcludes */);
+                }
+                else {
+                    var pattern = void 0;
+                    if (node.name.kind === 9 /* StringLiteral */) {
+                        var text = node.name.text;
+                        if (ts.hasZeroOrOneAsteriskCharacter(text)) {
+                            pattern = ts.tryParsePattern(text);
+                        }
+                        else {
+                            errorOnFirstToken(node.name, ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, text);
+                        }
+                    }
+                    var symbol = declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
+                    if (pattern) {
+                        (file.patternAmbientModules || (file.patternAmbientModules = [])).push({ pattern: pattern, symbol: symbol });
+                    }
+                }
+            }
+            else {
+                var state = getModuleInstanceState(node);
+                if (state === 0 /* NonInstantiated */) {
+                    declareSymbolAndAddToSymbolTable(node, 1024 /* NamespaceModule */, 0 /* NamespaceModuleExcludes */);
+                }
+                else {
+                    declareSymbolAndAddToSymbolTable(node, 512 /* ValueModule */, 106639 /* ValueModuleExcludes */);
+                    if (node.symbol.flags & (16 /* Function */ | 32 /* Class */ | 256 /* RegularEnum */)) {
+                        // if module was already merged with some function, class or non-const enum
+                        // treat is a non-const-enum-only
+                        node.symbol.constEnumOnlyModule = false;
+                    }
+                    else {
+                        var currentModuleIsConstEnumOnly = state === 2 /* ConstEnumOnly */;
+                        if (node.symbol.constEnumOnlyModule === undefined) {
+                            // non-merged case - use the current state
+                            node.symbol.constEnumOnlyModule = currentModuleIsConstEnumOnly;
+                        }
+                        else {
+                            // merged case: module is const enum only if all its pieces are non-instantiated or const enum
+                            node.symbol.constEnumOnlyModule = node.symbol.constEnumOnlyModule && currentModuleIsConstEnumOnly;
+                        }
+                    }
+                }
+            }
+        }
+        function bindFunctionOrConstructorType(node) {
+            // For a given function symbol "<...>(...) => T" we want to generate a symbol identical
+            // to the one we would get for: { <...>(...): T }
+            //
+            // We do that by making an anonymous type literal symbol, and then setting the function
+            // symbol as its sole member. To the rest of the system, this symbol will be  indistinguishable
+            // from an actual type literal symbol you would have gotten had you used the long form.
+            var symbol = createSymbol(131072 /* Signature */, getDeclarationName(node));
+            addDeclarationToSymbol(symbol, node, 131072 /* Signature */);
+            var typeLiteralSymbol = createSymbol(2048 /* TypeLiteral */, "__type");
+            addDeclarationToSymbol(typeLiteralSymbol, node, 2048 /* TypeLiteral */);
+            typeLiteralSymbol.members = (_a = {}, _a[symbol.name] = symbol, _a);
+            var _a;
+        }
+        function bindObjectLiteralExpression(node) {
+            var ElementKind;
+            (function (ElementKind) {
+                ElementKind[ElementKind["Property"] = 1] = "Property";
+                ElementKind[ElementKind["Accessor"] = 2] = "Accessor";
+            })(ElementKind || (ElementKind = {}));
+            if (inStrictMode) {
+                var seen = {};
+                for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (prop.name.kind !== 69 /* Identifier */) {
+                        continue;
+                    }
+                    var identifier = prop.name;
+                    // ECMA-262 11.1.5 Object Initializer
+                    // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
+                    // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
+                    // IsDataDescriptor(propId.descriptor) is true.
+                    //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
+                    //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
+                    //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
+                    // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
+                    var currentKind = prop.kind === 253 /* PropertyAssignment */ || prop.kind === 254 /* ShorthandPropertyAssignment */ || prop.kind === 147 /* MethodDeclaration */
+                        ? 1 /* Property */
+                        : 2 /* Accessor */;
+                    var existingKind = seen[identifier.text];
+                    if (!existingKind) {
+                        seen[identifier.text] = currentKind;
+                        continue;
+                    }
+                    if (currentKind === 1 /* Property */ && existingKind === 1 /* Property */) {
+                        var span = ts.getErrorSpanForNode(file, identifier);
+                        file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.An_object_literal_cannot_have_multiple_properties_with_the_same_name_in_strict_mode));
+                    }
+                }
+            }
+            return bindAnonymousDeclaration(node, 4096 /* ObjectLiteral */, "__object");
+        }
+        function bindAnonymousDeclaration(node, symbolFlags, name) {
+            var symbol = createSymbol(symbolFlags, name);
+            addDeclarationToSymbol(symbol, node, symbolFlags);
+        }
+        function bindBlockScopedDeclaration(node, symbolFlags, symbolExcludes) {
+            switch (blockScopeContainer.kind) {
+                case 225 /* ModuleDeclaration */:
+                    declareModuleMember(node, symbolFlags, symbolExcludes);
+                    break;
+                case 256 /* SourceFile */:
+                    if (ts.isExternalModule(container)) {
+                        declareModuleMember(node, symbolFlags, symbolExcludes);
+                        break;
+                    }
+                // fall through.
+                default:
+                    if (!blockScopeContainer.locals) {
+                        blockScopeContainer.locals = {};
+                        addToContainerChain(blockScopeContainer);
+                    }
+                    declareSymbol(blockScopeContainer.locals, undefined, node, symbolFlags, symbolExcludes);
+            }
+        }
+        function bindBlockScopedVariableDeclaration(node) {
+            bindBlockScopedDeclaration(node, 2 /* BlockScopedVariable */, 107455 /* BlockScopedVariableExcludes */);
+        }
+        // The binder visits every node in the syntax tree so it is a convenient place to perform a single localized
+        // check for reserved words used as identifiers in strict mode code.
+        function checkStrictModeIdentifier(node) {
+            if (inStrictMode &&
+                node.originalKeywordKind >= 106 /* FirstFutureReservedWord */ &&
+                node.originalKeywordKind <= 114 /* LastFutureReservedWord */ &&
+                !ts.isIdentifierName(node) &&
+                !ts.isInAmbientContext(node)) {
+                // Report error only if there are no parse errors in file
+                if (!file.parseDiagnostics.length) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, getStrictModeIdentifierMessage(node), ts.declarationNameToString(node)));
+                }
+            }
+        }
+        function getStrictModeIdentifierMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Identifier_expected_0_is_a_reserved_word_in_strict_mode;
+        }
+        function checkStrictModeBinaryExpression(node) {
+            if (inStrictMode && ts.isLeftHandSideExpression(node.left) && ts.isAssignmentOperator(node.operatorToken.kind)) {
+                // ECMA 262 (Annex C) The identifier eval or arguments may not appear as the LeftHandSideExpression of an
+                // Assignment operator(11.13) or of a PostfixExpression(11.3)
+                checkStrictModeEvalOrArguments(node, node.left);
+            }
+        }
+        function checkStrictModeCatchClause(node) {
+            // It is a SyntaxError if a TryStatement with a Catch occurs within strict code and the Identifier of the
+            // Catch production is eval or arguments
+            if (inStrictMode && node.variableDeclaration) {
+                checkStrictModeEvalOrArguments(node, node.variableDeclaration.name);
+            }
+        }
+        function checkStrictModeDeleteExpression(node) {
+            // Grammar checking
+            if (inStrictMode && node.expression.kind === 69 /* Identifier */) {
+                // When a delete operator occurs within strict mode code, a SyntaxError is thrown if its
+                // UnaryExpression is a direct reference to a variable, function argument, or function name
+                var span = ts.getErrorSpanForNode(file, node.expression);
+                file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, ts.Diagnostics.delete_cannot_be_called_on_an_identifier_in_strict_mode));
+            }
+        }
+        function isEvalOrArgumentsIdentifier(node) {
+            return node.kind === 69 /* Identifier */ &&
+                (node.text === "eval" || node.text === "arguments");
+        }
+        function checkStrictModeEvalOrArguments(contextNode, name) {
+            if (name && name.kind === 69 /* Identifier */) {
+                var identifier = name;
+                if (isEvalOrArgumentsIdentifier(identifier)) {
+                    // We check first if the name is inside class declaration or class expression; if so give explicit message
+                    // otherwise report generic error message.
+                    var span = ts.getErrorSpanForNode(file, name);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, getStrictModeEvalOrArgumentsMessage(contextNode), identifier.text));
+                }
+            }
+        }
+        function getStrictModeEvalOrArgumentsMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Invalid_use_of_0_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Invalid_use_of_0_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Invalid_use_of_0_in_strict_mode;
+        }
+        function checkStrictModeFunctionName(node) {
+            if (inStrictMode) {
+                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a strict mode FunctionDeclaration or FunctionExpression (13.1))
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+        }
+        function getStrictModeBlockScopeFunctionDeclarationMessage(node) {
+            // Provide specialized messages to help the user understand why we think they're in
+            // strict mode.
+            if (ts.getContainingClass(node)) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Class_definitions_are_automatically_in_strict_mode;
+            }
+            if (file.externalModuleIndicator) {
+                return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5_Modules_are_automatically_in_strict_mode;
+            }
+            return ts.Diagnostics.Function_declarations_are_not_allowed_inside_blocks_in_strict_mode_when_targeting_ES3_or_ES5;
+        }
+        function checkStrictModeFunctionDeclaration(node) {
+            if (languageVersion < 2 /* ES6 */) {
+                // Report error if function is not top level function declaration
+                if (blockScopeContainer.kind !== 256 /* SourceFile */ &&
+                    blockScopeContainer.kind !== 225 /* ModuleDeclaration */ &&
+                    !ts.isFunctionLike(blockScopeContainer)) {
+                    // We check first if the name is inside class declaration or class expression; if so give explicit message
+                    // otherwise report generic error message.
+                    var errorSpan = ts.getErrorSpanForNode(file, node);
+                    file.bindDiagnostics.push(ts.createFileDiagnostic(file, errorSpan.start, errorSpan.length, getStrictModeBlockScopeFunctionDeclarationMessage(node)));
+                }
+            }
+        }
+        function checkStrictModeNumericLiteral(node) {
+            if (inStrictMode && node.isOctalLiteral) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Octal_literals_are_not_allowed_in_strict_mode));
+            }
+        }
+        function checkStrictModePostfixUnaryExpression(node) {
+            // Grammar checking
+            // The identifier eval or arguments may not appear as the LeftHandSideExpression of an
+            // Assignment operator(11.13) or of a PostfixExpression(11.3) or as the UnaryExpression
+            // operated upon by a Prefix Increment(11.4.4) or a Prefix Decrement(11.4.5) operator.
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.operand);
+            }
+        }
+        function checkStrictModePrefixUnaryExpression(node) {
+            // Grammar checking
+            if (inStrictMode) {
+                if (node.operator === 41 /* PlusPlusToken */ || node.operator === 42 /* MinusMinusToken */) {
+                    checkStrictModeEvalOrArguments(node, node.operand);
+                }
+            }
+        }
+        function checkStrictModeWithStatement(node) {
+            // Grammar checking for withStatement
+            if (inStrictMode) {
+                errorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_strict_mode);
+            }
+        }
+        function errorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var span = ts.getSpanOfTokenAtPosition(file, node.pos);
+            file.bindDiagnostics.push(ts.createFileDiagnostic(file, span.start, span.length, message, arg0, arg1, arg2));
+        }
+        function getDestructuringParameterName(node) {
+            return "__" + ts.indexOf(node.parent.parameters, node);
+        }
+        function bind(node) {
+            if (!node) {
+                return;
+            }
+            node.parent = parent;
+            var saveInStrictMode = inStrictMode;
+            // First we bind declaration nodes to a symbol if possible. We'll both create a symbol
+            // and then potentially add the symbol to an appropriate symbol table. Possible
+            // destination symbol tables are:
+            //
+            //  1) The 'exports' table of the current container's symbol.
+            //  2) The 'members' table of the current container's symbol.
+            //  3) The 'locals' table of the current container.
+            //
+            // However, not all symbols will end up in any of these tables. 'Anonymous' symbols
+            // (like TypeLiterals for example) will not be put in any table.
+            bindWorker(node);
+            // Then we recurse into the children of the node to bind them as well. For certain
+            // symbols we do specialized work when we recurse. For example, we'll keep track of
+            // the current 'container' node when it changes. This helps us know which symbol table
+            // a local should go into for example. Since terminal nodes are known not to have
+            // children, as an optimization we don't process those.
+            if (node.kind > 138 /* LastToken */) {
+                var saveParent = parent;
+                parent = node;
+                var containerFlags = getContainerFlags(node);
+                if (containerFlags === 0 /* None */) {
+                    bindChildren(node);
+                }
+                else {
+                    bindContainer(node, containerFlags);
+                }
+                parent = saveParent;
+            }
+            inStrictMode = saveInStrictMode;
+        }
+        function updateStrictModeStatementList(statements) {
+            if (!inStrictMode) {
+                for (var _i = 0, statements_1 = statements; _i < statements_1.length; _i++) {
+                    var statement = statements_1[_i];
+                    if (!ts.isPrologueDirective(statement)) {
+                        return;
+                    }
+                    if (isUseStrictPrologueDirective(statement)) {
+                        inStrictMode = true;
+                        return;
+                    }
+                }
+            }
+        }
+        /// Should be called only on prologue directives (isPrologueDirective(node) should be true)
+        function isUseStrictPrologueDirective(node) {
+            var nodeText = ts.getTextOfNodeFromSourceText(file.text, node.expression);
+            // Note: the node text must be exactly "use strict" or 'use strict'.  It is not ok for the
+            // string to contain unicode escapes (as per ES5).
+            return nodeText === '"use strict"' || nodeText === "'use strict'";
+        }
+        function bindWorker(node) {
+            switch (node.kind) {
+                /* Strict mode checks */
+                case 69 /* Identifier */:
+                case 97 /* ThisKeyword */:
+                    if (currentFlow && (ts.isExpression(node) || parent.kind === 254 /* ShorthandPropertyAssignment */)) {
+                        node.flowNode = currentFlow;
+                    }
+                    return checkStrictModeIdentifier(node);
+                case 172 /* PropertyAccessExpression */:
+                    if (currentFlow && isNarrowableReference(node)) {
+                        node.flowNode = currentFlow;
+                    }
+                    break;
+                case 187 /* BinaryExpression */:
+                    if (ts.isInJavaScriptFile(node)) {
+                        var specialKind = ts.getSpecialPropertyAssignmentKind(node);
+                        switch (specialKind) {
+                            case 1 /* ExportsProperty */:
+                                bindExportsPropertyAssignment(node);
+                                break;
+                            case 2 /* ModuleExports */:
+                                bindModuleExportsAssignment(node);
+                                break;
+                            case 3 /* PrototypeProperty */:
+                                bindPrototypePropertyAssignment(node);
+                                break;
+                            case 4 /* ThisProperty */:
+                                bindThisPropertyAssignment(node);
+                                break;
+                            case 0 /* None */:
+                                // Nothing to do
+                                break;
+                            default:
+                                ts.Debug.fail("Unknown special property assignment kind");
+                        }
+                    }
+                    return checkStrictModeBinaryExpression(node);
+                case 252 /* CatchClause */:
+                    return checkStrictModeCatchClause(node);
+                case 181 /* DeleteExpression */:
+                    return checkStrictModeDeleteExpression(node);
+                case 8 /* NumericLiteral */:
+                    return checkStrictModeNumericLiteral(node);
+                case 186 /* PostfixUnaryExpression */:
+                    return checkStrictModePostfixUnaryExpression(node);
+                case 185 /* PrefixUnaryExpression */:
+                    return checkStrictModePrefixUnaryExpression(node);
+                case 212 /* WithStatement */:
+                    return checkStrictModeWithStatement(node);
+                case 165 /* ThisType */:
+                    seenThisKeyword = true;
+                    return;
+                case 154 /* TypePredicate */:
+                    return checkTypePredicate(node);
+                case 141 /* TypeParameter */:
+                    return declareSymbolAndAddToSymbolTable(node, 262144 /* TypeParameter */, 530912 /* TypeParameterExcludes */);
+                case 142 /* Parameter */:
+                    return bindParameter(node);
+                case 218 /* VariableDeclaration */:
+                case 169 /* BindingElement */:
+                    return bindVariableDeclarationOrBindingElement(node);
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 266 /* JSDocRecordMember */:
+                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
+                case 280 /* JSDocPropertyTag */:
+                    return bindJSDocProperty(node);
+                case 253 /* PropertyAssignment */:
+                case 254 /* ShorthandPropertyAssignment */:
+                    return bindPropertyOrMethodOrAccessor(node, 4 /* Property */, 0 /* PropertyExcludes */);
+                case 255 /* EnumMember */:
+                    return bindPropertyOrMethodOrAccessor(node, 8 /* EnumMember */, 107455 /* EnumMemberExcludes */);
+                case 247 /* JsxSpreadAttribute */:
+                    emitFlags |= 1073741824 /* HasJsxSpreadAttribute */;
+                    return;
+                case 151 /* CallSignature */:
+                case 152 /* ConstructSignature */:
+                case 153 /* IndexSignature */:
+                    return declareSymbolAndAddToSymbolTable(node, 131072 /* Signature */, 0 /* None */);
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                    // If this is an ObjectLiteralExpression method, then it sits in the same space
+                    // as other properties in the object literal.  So we use SymbolFlags.PropertyExcludes
+                    // so that it will conflict with any other object literal members with the same
+                    // name.
+                    return bindPropertyOrMethodOrAccessor(node, 8192 /* Method */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), ts.isObjectLiteralMethod(node) ? 0 /* PropertyExcludes */ : 99263 /* MethodExcludes */);
+                case 220 /* FunctionDeclaration */:
+                    return bindFunctionDeclaration(node);
+                case 148 /* Constructor */:
+                    return declareSymbolAndAddToSymbolTable(node, 16384 /* Constructor */, /*symbolExcludes:*/ 0 /* None */);
+                case 149 /* GetAccessor */:
+                    return bindPropertyOrMethodOrAccessor(node, 32768 /* GetAccessor */, 41919 /* GetAccessorExcludes */);
+                case 150 /* SetAccessor */:
+                    return bindPropertyOrMethodOrAccessor(node, 65536 /* SetAccessor */, 74687 /* SetAccessorExcludes */);
+                case 156 /* FunctionType */:
+                case 157 /* ConstructorType */:
+                case 269 /* JSDocFunctionType */:
+                    return bindFunctionOrConstructorType(node);
+                case 159 /* TypeLiteral */:
+                case 281 /* JSDocTypeLiteral */:
+                case 265 /* JSDocRecordType */:
+                    return bindAnonymousDeclaration(node, 2048 /* TypeLiteral */, "__type");
+                case 171 /* ObjectLiteralExpression */:
+                    return bindObjectLiteralExpression(node);
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    return bindFunctionExpression(node);
+                case 174 /* CallExpression */:
+                    if (ts.isInJavaScriptFile(node)) {
+                        bindCallExpression(node);
+                    }
+                    break;
+                // Members of classes, interfaces, and modules
+                case 192 /* ClassExpression */:
+                case 221 /* ClassDeclaration */:
+                    // All classes are automatically in strict mode in ES6.
+                    inStrictMode = true;
+                    return bindClassLikeDeclaration(node);
+                case 222 /* InterfaceDeclaration */:
+                    return bindBlockScopedDeclaration(node, 64 /* Interface */, 792960 /* InterfaceExcludes */);
+                case 279 /* JSDocTypedefTag */:
+                case 223 /* TypeAliasDeclaration */:
+                    return bindBlockScopedDeclaration(node, 524288 /* TypeAlias */, 793056 /* TypeAliasExcludes */);
+                case 224 /* EnumDeclaration */:
+                    return bindEnumDeclaration(node);
+                case 225 /* ModuleDeclaration */:
+                    return bindModuleDeclaration(node);
+                // Imports and exports
+                case 229 /* ImportEqualsDeclaration */:
+                case 232 /* NamespaceImport */:
+                case 234 /* ImportSpecifier */:
+                case 238 /* ExportSpecifier */:
+                    return declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
+                case 228 /* NamespaceExportDeclaration */:
+                    return bindNamespaceExportDeclaration(node);
+                case 231 /* ImportClause */:
+                    return bindImportClause(node);
+                case 236 /* ExportDeclaration */:
+                    return bindExportDeclaration(node);
+                case 235 /* ExportAssignment */:
+                    return bindExportAssignment(node);
+                case 256 /* SourceFile */:
+                    updateStrictModeStatementList(node.statements);
+                    return bindSourceFileIfExternalModule();
+                case 199 /* Block */:
+                    if (!ts.isFunctionLike(node.parent)) {
+                        return;
+                    }
+                // Fall through
+                case 226 /* ModuleBlock */:
+                    return updateStrictModeStatementList(node.statements);
+            }
+        }
+        function checkTypePredicate(node) {
+            var parameterName = node.parameterName, type = node.type;
+            if (parameterName && parameterName.kind === 69 /* Identifier */) {
+                checkStrictModeIdentifier(parameterName);
+            }
+            if (parameterName && parameterName.kind === 165 /* ThisType */) {
+                seenThisKeyword = true;
+            }
+            bind(type);
+        }
+        function bindSourceFileIfExternalModule() {
+            setExportContextFlag(file);
+            if (ts.isExternalModule(file)) {
+                bindSourceFileAsExternalModule();
+            }
+        }
+        function bindSourceFileAsExternalModule() {
+            bindAnonymousDeclaration(file, 512 /* ValueModule */, "\"" + ts.removeFileExtension(file.fileName) + "\"");
+        }
+        function bindExportAssignment(node) {
+            var boundExpression = node.kind === 235 /* ExportAssignment */ ? node.expression : node.right;
+            if (!container.symbol || !container.symbol.exports) {
+                // Export assignment in some sort of block construct
+                bindAnonymousDeclaration(node, 8388608 /* Alias */, getDeclarationName(node));
+            }
+            else if (boundExpression.kind === 69 /* Identifier */ && node.kind === 235 /* ExportAssignment */) {
+                // An export default clause with an identifier exports all meanings of that identifier
+                declareSymbol(container.symbol.exports, container.symbol, node, 8388608 /* Alias */, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
+            }
+            else {
+                // An export default clause with an expression exports a value
+                declareSymbol(container.symbol.exports, container.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ | 8388608 /* AliasExcludes */);
+            }
+        }
+        function bindNamespaceExportDeclaration(node) {
+            if (node.modifiers && node.modifiers.length) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Modifiers_cannot_appear_here));
+            }
+            if (node.parent.kind !== 256 /* SourceFile */) {
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_at_top_level));
+                return;
+            }
+            else {
+                var parent_6 = node.parent;
+                if (!ts.isExternalModule(parent_6)) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_module_files));
+                    return;
+                }
+                if (!parent_6.isDeclarationFile) {
+                    file.bindDiagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Global_module_exports_may_only_appear_in_declaration_files));
+                    return;
+                }
+            }
+            file.symbol.globalExports = file.symbol.globalExports || {};
+            declareSymbol(file.symbol.globalExports, file.symbol, node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
+        }
+        function bindExportDeclaration(node) {
+            if (!container.symbol || !container.symbol.exports) {
+                // Export * in some sort of block construct
+                bindAnonymousDeclaration(node, 1073741824 /* ExportStar */, getDeclarationName(node));
+            }
+            else if (!node.exportClause) {
+                // All export * declarations are collected in an __export symbol
+                declareSymbol(container.symbol.exports, container.symbol, node, 1073741824 /* ExportStar */, 0 /* None */);
+            }
+        }
+        function bindImportClause(node) {
+            if (node.name) {
+                declareSymbolAndAddToSymbolTable(node, 8388608 /* Alias */, 8388608 /* AliasExcludes */);
+            }
+        }
+        function setCommonJsModuleIndicator(node) {
+            if (!file.commonJsModuleIndicator) {
+                file.commonJsModuleIndicator = node;
+                bindSourceFileAsExternalModule();
+            }
+        }
+        function bindExportsPropertyAssignment(node) {
+            // When we create a property via 'exports.foo = bar', the 'exports.foo' property access
+            // expression is the declaration
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node.left, 4 /* Property */ | 7340032 /* Export */, 0 /* None */);
+        }
+        function bindModuleExportsAssignment(node) {
+            // 'module.exports = expr' assignment
+            setCommonJsModuleIndicator(node);
+            declareSymbol(file.symbol.exports, file.symbol, node, 4 /* Property */ | 7340032 /* Export */ | 512 /* ValueModule */, 0 /* None */);
+        }
+        function bindThisPropertyAssignment(node) {
+            // Declare a 'member' in case it turns out the container was an ES5 class or ES6 constructor
+            var assignee;
+            if (container.kind === 220 /* FunctionDeclaration */ || container.kind === 220 /* FunctionDeclaration */) {
+                assignee = container;
+            }
+            else if (container.kind === 148 /* Constructor */) {
+                assignee = container.parent;
+            }
+            else {
+                return;
+            }
+            assignee.symbol.members = assignee.symbol.members || {};
+            // It's acceptable for multiple 'this' assignments of the same identifier to occur
+            declareSymbol(assignee.symbol.members, assignee.symbol, node, 4 /* Property */, 0 /* PropertyExcludes */ & ~4 /* Property */);
+        }
+        function bindPrototypePropertyAssignment(node) {
+            // We saw a node of the form 'x.prototype.y = z'. Declare a 'member' y on x if x was a function.
+            // Look up the function in the local scope, since prototype assignments should
+            // follow the function declaration
+            var leftSideOfAssignment = node.left;
+            var classPrototype = leftSideOfAssignment.expression;
+            var constructorFunction = classPrototype.expression;
+            // Fix up parent pointers since we're going to use these nodes before we bind into them
+            leftSideOfAssignment.parent = node;
+            constructorFunction.parent = classPrototype;
+            classPrototype.parent = leftSideOfAssignment;
+            var funcSymbol = container.locals[constructorFunction.text];
+            if (!funcSymbol || !(funcSymbol.flags & 16 /* Function */)) {
+                return;
+            }
+            // Set up the members collection if it doesn't exist already
+            if (!funcSymbol.members) {
+                funcSymbol.members = {};
+            }
+            // Declare the method/property
+            declareSymbol(funcSymbol.members, funcSymbol, leftSideOfAssignment, 4 /* Property */, 0 /* PropertyExcludes */);
+        }
+        function bindCallExpression(node) {
+            // We're only inspecting call expressions to detect CommonJS modules, so we can skip
+            // this check if we've already seen the module indicator
+            if (!file.commonJsModuleIndicator && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ false)) {
+                setCommonJsModuleIndicator(node);
+            }
+        }
+        function bindClassLikeDeclaration(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.getClassExtendsHeritageClauseElement(node) !== undefined) {
+                    emitFlags |= 262144 /* HasClassExtends */;
+                }
+                if (ts.nodeIsDecorated(node)) {
+                    emitFlags |= 524288 /* HasDecorators */;
+                }
+            }
+            if (node.kind === 221 /* ClassDeclaration */) {
+                bindBlockScopedDeclaration(node, 32 /* Class */, 899519 /* ClassExcludes */);
+            }
+            else {
+                var bindingName = node.name ? node.name.text : "__class";
+                bindAnonymousDeclaration(node, 32 /* Class */, bindingName);
+                // Add name of class expression into the map for semantic classifier
+                if (node.name) {
+                    classifiableNames[node.name.text] = node.name.text;
+                }
+            }
+            var symbol = node.symbol;
+            // TypeScript 1.0 spec (April 2014): 8.4
+            // Every class automatically contains a static property member named 'prototype', the
+            // type of which is an instantiation of the class type with type Any supplied as a type
+            // argument for each type parameter. It is an error to explicitly declare a static
+            // property member with the name 'prototype'.
+            //
+            // Note: we check for this here because this class may be merging into a module.  The
+            // module might have an exported variable called 'prototype'.  We can't allow that as
+            // that would clash with the built-in 'prototype' for the class.
+            var prototypeSymbol = createSymbol(4 /* Property */ | 134217728 /* Prototype */, "prototype");
+            if (ts.hasProperty(symbol.exports, prototypeSymbol.name)) {
+                if (node.name) {
+                    node.name.parent = node;
+                }
+                file.bindDiagnostics.push(ts.createDiagnosticForNode(symbol.exports[prototypeSymbol.name].declarations[0], ts.Diagnostics.Duplicate_identifier_0, prototypeSymbol.name));
+            }
+            symbol.exports[prototypeSymbol.name] = prototypeSymbol;
+            prototypeSymbol.parent = symbol;
+        }
+        function bindEnumDeclaration(node) {
+            return ts.isConst(node)
+                ? bindBlockScopedDeclaration(node, 128 /* ConstEnum */, 899967 /* ConstEnumExcludes */)
+                : bindBlockScopedDeclaration(node, 256 /* RegularEnum */, 899327 /* RegularEnumExcludes */);
+        }
+        function bindVariableDeclarationOrBindingElement(node) {
+            if (inStrictMode) {
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (!ts.isBindingPattern(node.name)) {
+                if (ts.isBlockOrCatchScoped(node)) {
+                    bindBlockScopedVariableDeclaration(node);
+                }
+                else if (ts.isParameterDeclaration(node)) {
+                    // It is safe to walk up parent chain to find whether the node is a destructing parameter declaration
+                    // because its parent chain has already been set up, since parents are set before descending into children.
+                    //
+                    // If node is a binding element in parameter declaration, we need to use ParameterExcludes.
+                    // Using ParameterExcludes flag allows the compiler to report an error on duplicate identifiers in Parameter Declaration
+                    // For example:
+                    //      function foo([a,a]) {} // Duplicate Identifier error
+                    //      function bar(a,a) {}   // Duplicate Identifier error, parameter declaration in this case is handled in bindParameter
+                    //                             // which correctly set excluded symbols
+                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
+                }
+                else {
+                    declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107454 /* FunctionScopedVariableExcludes */);
+                }
+            }
+        }
+        function bindParameter(node) {
+            if (!ts.isDeclarationFile(file) &&
+                !ts.isInAmbientContext(node) &&
+                ts.nodeIsDecorated(node)) {
+                emitFlags |= (524288 /* HasDecorators */ | 1048576 /* HasParamDecorators */);
+            }
+            if (inStrictMode) {
+                // It is a SyntaxError if the identifier eval or arguments appears within a FormalParameterList of a
+                // strict mode FunctionLikeDeclaration or FunctionExpression(13.1)
+                checkStrictModeEvalOrArguments(node, node.name);
+            }
+            if (ts.isBindingPattern(node.name)) {
+                bindAnonymousDeclaration(node, 1 /* FunctionScopedVariable */, getDestructuringParameterName(node));
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 1 /* FunctionScopedVariable */, 107455 /* ParameterExcludes */);
+            }
+            // If this is a property-parameter, then also declare the property symbol into the
+            // containing class.
+            if (ts.isParameterPropertyDeclaration(node)) {
+                var classDeclaration = node.parent.parent;
+                declareSymbol(classDeclaration.symbol.members, classDeclaration.symbol, node, 4 /* Property */ | (node.questionToken ? 536870912 /* Optional */ : 0 /* None */), 0 /* PropertyExcludes */);
+            }
+        }
+        function bindFunctionDeclaration(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152 /* HasAsyncFunctions */;
+                }
+            }
+            checkStrictModeFunctionName(node);
+            if (inStrictMode) {
+                checkStrictModeFunctionDeclaration(node);
+                bindBlockScopedDeclaration(node, 16 /* Function */, 106927 /* FunctionExcludes */);
+            }
+            else {
+                declareSymbolAndAddToSymbolTable(node, 16 /* Function */, 106927 /* FunctionExcludes */);
+            }
+        }
+        function bindFunctionExpression(node) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152 /* HasAsyncFunctions */;
+                }
+            }
+            if (currentFlow) {
+                node.flowNode = currentFlow;
+            }
+            checkStrictModeFunctionName(node);
+            var bindingName = node.name ? node.name.text : "__function";
+            return bindAnonymousDeclaration(node, 16 /* Function */, bindingName);
+        }
+        function bindPropertyOrMethodOrAccessor(node, symbolFlags, symbolExcludes) {
+            if (!ts.isDeclarationFile(file) && !ts.isInAmbientContext(node)) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    emitFlags |= 2097152 /* HasAsyncFunctions */;
+                }
+                if (ts.nodeIsDecorated(node)) {
+                    emitFlags |= 524288 /* HasDecorators */;
+                }
+            }
+            return ts.hasDynamicName(node)
+                ? bindAnonymousDeclaration(node, symbolFlags, "__computed")
+                : declareSymbolAndAddToSymbolTable(node, symbolFlags, symbolExcludes);
+        }
+        function bindJSDocProperty(node) {
+            return declareSymbolAndAddToSymbolTable(node, 4 /* Property */, 0 /* PropertyExcludes */);
+        }
+        // reachability checks
+        function shouldReportErrorOnModuleDeclaration(node) {
+            var instanceState = getModuleInstanceState(node);
+            return instanceState === 1 /* Instantiated */ || (instanceState === 2 /* ConstEnumOnly */ && options.preserveConstEnums);
+        }
+        function checkUnreachable(node) {
+            if (!(currentFlow.flags & 1 /* Unreachable */)) {
+                return false;
+            }
+            if (currentFlow === unreachableFlow) {
+                var reportError = 
+                // report error on all statements except empty ones
+                (ts.isStatement(node) && node.kind !== 201 /* EmptyStatement */) ||
+                    // report error on class declarations
+                    node.kind === 221 /* ClassDeclaration */ ||
+                    // report error on instantiated modules or const-enums only modules if preserveConstEnums is set
+                    (node.kind === 225 /* ModuleDeclaration */ && shouldReportErrorOnModuleDeclaration(node)) ||
+                    // report error on regular enums and const enums if preserveConstEnums is set
+                    (node.kind === 224 /* EnumDeclaration */ && (!ts.isConstEnumDeclaration(node) || options.preserveConstEnums));
+                if (reportError) {
+                    currentFlow = reportedUnreachableFlow;
+                    // unreachable code is reported if
+                    // - user has explicitly asked about it AND
+                    // - statement is in not ambient context (statements in ambient context is already an error
+                    //   so we should not report extras) AND
+                    //   - node is not variable statement OR
+                    //   - node is block scoped variable statement OR
+                    //   - node is not block scoped variable statement and at least one variable declaration has initializer
+                    //   Rationale: we don't want to report errors on non-initialized var's since they are hoisted
+                    //   On the other side we do want to report errors on non-initialized 'lets' because of TDZ
+                    var reportUnreachableCode = !options.allowUnreachableCode &&
+                        !ts.isInAmbientContext(node) &&
+                        (node.kind !== 200 /* VariableStatement */ ||
+                            ts.getCombinedNodeFlags(node.declarationList) & 3072 /* BlockScoped */ ||
+                            ts.forEach(node.declarationList.declarations, function (d) { return d.initializer; }));
+                    if (reportUnreachableCode) {
+                        errorOnFirstToken(node, ts.Diagnostics.Unreachable_code_detected);
+                    }
+                }
+            }
+            return true;
+        }
+    }
+})(ts || (ts = {}));
+/// <reference path="binder.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var nextSymbolId = 1;
+    var nextNodeId = 1;
+    var nextMergeId = 1;
+    var nextFlowId = 1;
+    function getNodeId(node) {
+        if (!node.id) {
+            node.id = nextNodeId;
+            nextNodeId++;
+        }
+        return node.id;
+    }
+    ts.getNodeId = getNodeId;
+    ts.checkTime = 0;
+    function getSymbolId(symbol) {
+        if (!symbol.id) {
+            symbol.id = nextSymbolId;
+            nextSymbolId++;
+        }
+        return symbol.id;
+    }
+    ts.getSymbolId = getSymbolId;
+    function createTypeChecker(host, produceDiagnostics) {
+        // Cancellation that controls whether or not we can cancel in the middle of type checking.
+        // In general cancelling is *not* safe for the type checker.  We might be in the middle of
+        // computing something, and we will leave our internals in an inconsistent state.  Callers
+        // who set the cancellation token should catch if a cancellation exception occurs, and
+        // should throw away and create a new TypeChecker.
+        //
+        // Currently we only support setting the cancellation token when getting diagnostics.  This
+        // is because diagnostics can be quite expensive, and we want to allow hosts to bail out if
+        // they no longer need the information (for example, if the user started editing again).
+        var cancellationToken;
+        var Symbol = ts.objectAllocator.getSymbolConstructor();
+        var Type = ts.objectAllocator.getTypeConstructor();
+        var Signature = ts.objectAllocator.getSignatureConstructor();
+        var typeCount = 0;
+        var symbolCount = 0;
+        var emptyArray = [];
+        var emptySymbols = {};
+        var compilerOptions = host.getCompilerOptions();
+        var languageVersion = compilerOptions.target || 0 /* ES3 */;
+        var modulekind = ts.getEmitModuleKind(compilerOptions);
+        var allowSyntheticDefaultImports = typeof compilerOptions.allowSyntheticDefaultImports !== "undefined" ? compilerOptions.allowSyntheticDefaultImports : modulekind === ts.ModuleKind.System;
+        var strictNullChecks = compilerOptions.strictNullChecks;
+        var emitResolver = createResolver();
+        var undefinedSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "undefined");
+        undefinedSymbol.declarations = [];
+        var argumentsSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "arguments");
+        var checker = {
+            getNodeCount: function () { return ts.sum(host.getSourceFiles(), "nodeCount"); },
+            getIdentifierCount: function () { return ts.sum(host.getSourceFiles(), "identifierCount"); },
+            getSymbolCount: function () { return ts.sum(host.getSourceFiles(), "symbolCount") + symbolCount; },
+            getTypeCount: function () { return typeCount; },
+            isUndefinedSymbol: function (symbol) { return symbol === undefinedSymbol; },
+            isArgumentsSymbol: function (symbol) { return symbol === argumentsSymbol; },
+            isUnknownSymbol: function (symbol) { return symbol === unknownSymbol; },
+            getDiagnostics: getDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getTypeOfSymbolAtLocation: getTypeOfSymbolAtLocation,
+            getSymbolsOfParameterPropertyDeclaration: getSymbolsOfParameterPropertyDeclaration,
+            getDeclaredTypeOfSymbol: getDeclaredTypeOfSymbol,
+            getPropertiesOfType: getPropertiesOfType,
+            getPropertyOfType: getPropertyOfType,
+            getSignaturesOfType: getSignaturesOfType,
+            getIndexTypeOfType: getIndexTypeOfType,
+            getBaseTypes: getBaseTypes,
+            getReturnTypeOfSignature: getReturnTypeOfSignature,
+            getNonNullableType: getNonNullableType,
+            getSymbolsInScope: getSymbolsInScope,
+            getSymbolAtLocation: getSymbolAtLocation,
+            getShorthandAssignmentValueSymbol: getShorthandAssignmentValueSymbol,
+            getExportSpecifierLocalTargetSymbol: getExportSpecifierLocalTargetSymbol,
+            getTypeAtLocation: getTypeOfNode,
+            getPropertySymbolOfDestructuringAssignment: getPropertySymbolOfDestructuringAssignment,
+            typeToString: typeToString,
+            getSymbolDisplayBuilder: getSymbolDisplayBuilder,
+            symbolToString: symbolToString,
+            getAugmentedPropertiesOfType: getAugmentedPropertiesOfType,
+            getRootSymbols: getRootSymbols,
+            getContextualType: getContextualType,
+            getFullyQualifiedName: getFullyQualifiedName,
+            getResolvedSignature: getResolvedSignature,
+            getConstantValue: getConstantValue,
+            isValidPropertyAccess: isValidPropertyAccess,
+            getSignatureFromDeclaration: getSignatureFromDeclaration,
+            isImplementationOfOverload: isImplementationOfOverload,
+            getAliasedSymbol: resolveAlias,
+            getEmitResolver: getEmitResolver,
+            getExportsOfModule: getExportsOfModuleAsArray,
+            getJsxElementAttributesType: getJsxElementAttributesType,
+            getJsxIntrinsicTagNames: getJsxIntrinsicTagNames,
+            isOptionalParameter: isOptionalParameter
+        };
+        var unknownSymbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "unknown");
+        var resolvingSymbol = createSymbol(67108864 /* Transient */, "__resolving__");
+        var anyType = createIntrinsicType(1 /* Any */, "any");
+        var stringType = createIntrinsicType(2 /* String */, "string");
+        var numberType = createIntrinsicType(4 /* Number */, "number");
+        var booleanType = createIntrinsicType(8 /* Boolean */, "boolean");
+        var esSymbolType = createIntrinsicType(16777216 /* ESSymbol */, "symbol");
+        var voidType = createIntrinsicType(16 /* Void */, "void");
+        var undefinedType = createIntrinsicType(32 /* Undefined */, "undefined");
+        var undefinedWideningType = strictNullChecks ? undefinedType : createIntrinsicType(32 /* Undefined */ | 2097152 /* ContainsWideningType */, "undefined");
+        var nullType = createIntrinsicType(64 /* Null */, "null");
+        var nullWideningType = strictNullChecks ? nullType : createIntrinsicType(64 /* Null */ | 2097152 /* ContainsWideningType */, "null");
+        var unknownType = createIntrinsicType(1 /* Any */, "unknown");
+        var neverType = createIntrinsicType(134217728 /* Never */, "never");
+        var emptyObjectType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var emptyGenericType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        emptyGenericType.instantiations = {};
+        var anyFunctionType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        // The anyFunctionType contains the anyFunctionType by definition. The flag is further propagated
+        // in getPropagatingFlagsOfTypes, and it is checked in inferFromTypes.
+        anyFunctionType.flags |= 8388608 /* ContainsAnyFunctionType */;
+        var noConstraintType = createAnonymousType(undefined, emptySymbols, emptyArray, emptyArray, undefined, undefined);
+        var anySignature = createSignature(undefined, undefined, undefined, emptyArray, anyType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasStringLiterals*/ false);
+        var unknownSignature = createSignature(undefined, undefined, undefined, emptyArray, unknownType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasStringLiterals*/ false);
+        var enumNumberIndexInfo = createIndexInfo(stringType, /*isReadonly*/ true);
+        var globals = {};
+        /**
+         * List of every ambient module with a "*" wildcard.
+         * Unlike other ambient modules, these can't be stored in `globals` because symbol tables only deal with exact matches.
+         * This is only used if there is no exact match.
+        */
+        var patternAmbientModules;
+        var getGlobalESSymbolConstructorSymbol;
+        var getGlobalPromiseConstructorSymbol;
+        var globalObjectType;
+        var globalFunctionType;
+        var globalArrayType;
+        var globalReadonlyArrayType;
+        var globalStringType;
+        var globalNumberType;
+        var globalBooleanType;
+        var globalRegExpType;
+        var anyArrayType;
+        var anyReadonlyArrayType;
+        // The library files are only loaded when the feature is used.
+        // This allows users to just specify library files they want to used through --lib
+        // and they will not get an error from not having unrelated library files
+        var getGlobalTemplateStringsArrayType;
+        var getGlobalESSymbolType;
+        var getGlobalIterableType;
+        var getGlobalIteratorType;
+        var getGlobalIterableIteratorType;
+        var getGlobalClassDecoratorType;
+        var getGlobalParameterDecoratorType;
+        var getGlobalPropertyDecoratorType;
+        var getGlobalMethodDecoratorType;
+        var getGlobalTypedPropertyDescriptorType;
+        var getGlobalPromiseType;
+        var tryGetGlobalPromiseType;
+        var getGlobalPromiseLikeType;
+        var getInstantiatedGlobalPromiseLikeType;
+        var getGlobalPromiseConstructorLikeType;
+        var getGlobalThenableType;
+        var jsxElementClassType;
+        var deferredNodes;
+        var flowLoopStart = 0;
+        var flowLoopCount = 0;
+        var visitedFlowCount = 0;
+        var tupleTypes = {};
+        var unionTypes = {};
+        var intersectionTypes = {};
+        var stringLiteralTypes = {};
+        var resolutionTargets = [];
+        var resolutionResults = [];
+        var resolutionPropertyNames = [];
+        var mergedSymbols = [];
+        var symbolLinks = [];
+        var nodeLinks = [];
+        var flowLoopCaches = [];
+        var flowLoopNodes = [];
+        var flowLoopKeys = [];
+        var flowLoopTypes = [];
+        var visitedFlowNodes = [];
+        var visitedFlowTypes = [];
+        var potentialThisCollisions = [];
+        var awaitedTypeStack = [];
+        var diagnostics = ts.createDiagnosticCollection();
+        var TypeFacts;
+        (function (TypeFacts) {
+            TypeFacts[TypeFacts["None"] = 0] = "None";
+            TypeFacts[TypeFacts["TypeofEQString"] = 1] = "TypeofEQString";
+            TypeFacts[TypeFacts["TypeofEQNumber"] = 2] = "TypeofEQNumber";
+            TypeFacts[TypeFacts["TypeofEQBoolean"] = 4] = "TypeofEQBoolean";
+            TypeFacts[TypeFacts["TypeofEQSymbol"] = 8] = "TypeofEQSymbol";
+            TypeFacts[TypeFacts["TypeofEQObject"] = 16] = "TypeofEQObject";
+            TypeFacts[TypeFacts["TypeofEQFunction"] = 32] = "TypeofEQFunction";
+            TypeFacts[TypeFacts["TypeofEQHostObject"] = 64] = "TypeofEQHostObject";
+            TypeFacts[TypeFacts["TypeofNEString"] = 128] = "TypeofNEString";
+            TypeFacts[TypeFacts["TypeofNENumber"] = 256] = "TypeofNENumber";
+            TypeFacts[TypeFacts["TypeofNEBoolean"] = 512] = "TypeofNEBoolean";
+            TypeFacts[TypeFacts["TypeofNESymbol"] = 1024] = "TypeofNESymbol";
+            TypeFacts[TypeFacts["TypeofNEObject"] = 2048] = "TypeofNEObject";
+            TypeFacts[TypeFacts["TypeofNEFunction"] = 4096] = "TypeofNEFunction";
+            TypeFacts[TypeFacts["TypeofNEHostObject"] = 8192] = "TypeofNEHostObject";
+            TypeFacts[TypeFacts["EQUndefined"] = 16384] = "EQUndefined";
+            TypeFacts[TypeFacts["EQNull"] = 32768] = "EQNull";
+            TypeFacts[TypeFacts["EQUndefinedOrNull"] = 65536] = "EQUndefinedOrNull";
+            TypeFacts[TypeFacts["NEUndefined"] = 131072] = "NEUndefined";
+            TypeFacts[TypeFacts["NENull"] = 262144] = "NENull";
+            TypeFacts[TypeFacts["NEUndefinedOrNull"] = 524288] = "NEUndefinedOrNull";
+            TypeFacts[TypeFacts["Truthy"] = 1048576] = "Truthy";
+            TypeFacts[TypeFacts["Falsy"] = 2097152] = "Falsy";
+            TypeFacts[TypeFacts["All"] = 4194303] = "All";
+            // The following members encode facts about particular kinds of types for use in the getTypeFacts function.
+            // The presence of a particular fact means that the given test is true for some (and possibly all) values
+            // of that kind of type.
+            TypeFacts[TypeFacts["StringStrictFacts"] = 4079361] = "StringStrictFacts";
+            TypeFacts[TypeFacts["StringFacts"] = 4194049] = "StringFacts";
+            TypeFacts[TypeFacts["NumberStrictFacts"] = 4079234] = "NumberStrictFacts";
+            TypeFacts[TypeFacts["NumberFacts"] = 4193922] = "NumberFacts";
+            TypeFacts[TypeFacts["BooleanStrictFacts"] = 4078980] = "BooleanStrictFacts";
+            TypeFacts[TypeFacts["BooleanFacts"] = 4193668] = "BooleanFacts";
+            TypeFacts[TypeFacts["SymbolStrictFacts"] = 1981320] = "SymbolStrictFacts";
+            TypeFacts[TypeFacts["SymbolFacts"] = 4193160] = "SymbolFacts";
+            TypeFacts[TypeFacts["ObjectStrictFacts"] = 1972176] = "ObjectStrictFacts";
+            TypeFacts[TypeFacts["ObjectFacts"] = 4184016] = "ObjectFacts";
+            TypeFacts[TypeFacts["FunctionStrictFacts"] = 1970144] = "FunctionStrictFacts";
+            TypeFacts[TypeFacts["FunctionFacts"] = 4181984] = "FunctionFacts";
+            TypeFacts[TypeFacts["UndefinedFacts"] = 2457472] = "UndefinedFacts";
+            TypeFacts[TypeFacts["NullFacts"] = 2340752] = "NullFacts";
+        })(TypeFacts || (TypeFacts = {}));
+        var typeofEQFacts = {
+            "string": 1 /* TypeofEQString */,
+            "number": 2 /* TypeofEQNumber */,
+            "boolean": 4 /* TypeofEQBoolean */,
+            "symbol": 8 /* TypeofEQSymbol */,
+            "undefined": 16384 /* EQUndefined */,
+            "object": 16 /* TypeofEQObject */,
+            "function": 32 /* TypeofEQFunction */
+        };
+        var typeofNEFacts = {
+            "string": 128 /* TypeofNEString */,
+            "number": 256 /* TypeofNENumber */,
+            "boolean": 512 /* TypeofNEBoolean */,
+            "symbol": 1024 /* TypeofNESymbol */,
+            "undefined": 131072 /* NEUndefined */,
+            "object": 2048 /* TypeofNEObject */,
+            "function": 4096 /* TypeofNEFunction */
+        };
+        var typeofTypesByName = {
+            "string": stringType,
+            "number": numberType,
+            "boolean": booleanType,
+            "symbol": esSymbolType,
+            "undefined": undefinedType
+        };
+        var jsxElementType;
+        /** Things we lazy load from the JSX namespace */
+        var jsxTypes = {};
+        var JsxNames = {
+            JSX: "JSX",
+            IntrinsicElements: "IntrinsicElements",
+            ElementClass: "ElementClass",
+            ElementAttributesPropertyNameContainer: "ElementAttributesProperty",
+            Element: "Element",
+            IntrinsicAttributes: "IntrinsicAttributes",
+            IntrinsicClassAttributes: "IntrinsicClassAttributes"
+        };
+        var subtypeRelation = {};
+        var assignableRelation = {};
+        var comparableRelation = {};
+        var identityRelation = {};
+        // This is for caching the result of getSymbolDisplayBuilder. Do not access directly.
+        var _displayBuilder;
+        var TypeSystemPropertyName;
+        (function (TypeSystemPropertyName) {
+            TypeSystemPropertyName[TypeSystemPropertyName["Type"] = 0] = "Type";
+            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedBaseConstructorType"] = 1] = "ResolvedBaseConstructorType";
+            TypeSystemPropertyName[TypeSystemPropertyName["DeclaredType"] = 2] = "DeclaredType";
+            TypeSystemPropertyName[TypeSystemPropertyName["ResolvedReturnType"] = 3] = "ResolvedReturnType";
+        })(TypeSystemPropertyName || (TypeSystemPropertyName = {}));
+        var builtinGlobals = (_a = {},
+            _a[undefinedSymbol.name] = undefinedSymbol,
+            _a
+        );
+        initializeTypeChecker();
+        return checker;
+        function getEmitResolver(sourceFile, cancellationToken) {
+            // Ensure we have all the type information in place for this file so that all the
+            // emitter questions of this resolver will return the right information.
+            getDiagnostics(sourceFile, cancellationToken);
+            return emitResolver;
+        }
+        function error(location, message, arg0, arg1, arg2) {
+            var diagnostic = location
+                ? ts.createDiagnosticForNode(location, message, arg0, arg1, arg2)
+                : ts.createCompilerDiagnostic(message, arg0, arg1, arg2);
+            diagnostics.add(diagnostic);
+        }
+        function createSymbol(flags, name) {
+            symbolCount++;
+            return new Symbol(flags, name);
+        }
+        function getExcludedSymbolFlags(flags) {
+            var result = 0;
+            if (flags & 2 /* BlockScopedVariable */)
+                result |= 107455 /* BlockScopedVariableExcludes */;
+            if (flags & 1 /* FunctionScopedVariable */)
+                result |= 107454 /* FunctionScopedVariableExcludes */;
+            if (flags & 4 /* Property */)
+                result |= 0 /* PropertyExcludes */;
+            if (flags & 8 /* EnumMember */)
+                result |= 107455 /* EnumMemberExcludes */;
+            if (flags & 16 /* Function */)
+                result |= 106927 /* FunctionExcludes */;
+            if (flags & 32 /* Class */)
+                result |= 899519 /* ClassExcludes */;
+            if (flags & 64 /* Interface */)
+                result |= 792960 /* InterfaceExcludes */;
+            if (flags & 256 /* RegularEnum */)
+                result |= 899327 /* RegularEnumExcludes */;
+            if (flags & 128 /* ConstEnum */)
+                result |= 899967 /* ConstEnumExcludes */;
+            if (flags & 512 /* ValueModule */)
+                result |= 106639 /* ValueModuleExcludes */;
+            if (flags & 8192 /* Method */)
+                result |= 99263 /* MethodExcludes */;
+            if (flags & 32768 /* GetAccessor */)
+                result |= 41919 /* GetAccessorExcludes */;
+            if (flags & 65536 /* SetAccessor */)
+                result |= 74687 /* SetAccessorExcludes */;
+            if (flags & 262144 /* TypeParameter */)
+                result |= 530912 /* TypeParameterExcludes */;
+            if (flags & 524288 /* TypeAlias */)
+                result |= 793056 /* TypeAliasExcludes */;
+            if (flags & 8388608 /* Alias */)
+                result |= 8388608 /* AliasExcludes */;
+            return result;
+        }
+        function recordMergedSymbol(target, source) {
+            if (!source.mergeId) {
+                source.mergeId = nextMergeId;
+                nextMergeId++;
+            }
+            mergedSymbols[source.mergeId] = target;
+        }
+        function cloneSymbol(symbol) {
+            var result = createSymbol(symbol.flags | 33554432 /* Merged */, symbol.name);
+            result.declarations = symbol.declarations.slice(0);
+            result.parent = symbol.parent;
+            if (symbol.valueDeclaration)
+                result.valueDeclaration = symbol.valueDeclaration;
+            if (symbol.constEnumOnlyModule)
+                result.constEnumOnlyModule = true;
+            if (symbol.members)
+                result.members = cloneSymbolTable(symbol.members);
+            if (symbol.exports)
+                result.exports = cloneSymbolTable(symbol.exports);
+            recordMergedSymbol(result, symbol);
+            return result;
+        }
+        function mergeSymbol(target, source) {
+            if (!(target.flags & getExcludedSymbolFlags(source.flags))) {
+                if (source.flags & 512 /* ValueModule */ && target.flags & 512 /* ValueModule */ && target.constEnumOnlyModule && !source.constEnumOnlyModule) {
+                    // reset flag when merging instantiated module into value module that has only const enums
+                    target.constEnumOnlyModule = false;
+                }
+                target.flags |= source.flags;
+                if (source.valueDeclaration &&
+                    (!target.valueDeclaration ||
+                        (target.valueDeclaration.kind === 225 /* ModuleDeclaration */ && source.valueDeclaration.kind !== 225 /* ModuleDeclaration */))) {
+                    // other kinds of value declarations take precedence over modules
+                    target.valueDeclaration = source.valueDeclaration;
+                }
+                ts.forEach(source.declarations, function (node) {
+                    target.declarations.push(node);
+                });
+                if (source.members) {
+                    if (!target.members)
+                        target.members = {};
+                    mergeSymbolTable(target.members, source.members);
+                }
+                if (source.exports) {
+                    if (!target.exports)
+                        target.exports = {};
+                    mergeSymbolTable(target.exports, source.exports);
+                }
+                recordMergedSymbol(target, source);
+            }
+            else {
+                var message_2 = target.flags & 2 /* BlockScopedVariable */ || source.flags & 2 /* BlockScopedVariable */
+                    ? ts.Diagnostics.Cannot_redeclare_block_scoped_variable_0 : ts.Diagnostics.Duplicate_identifier_0;
+                ts.forEach(source.declarations, function (node) {
+                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                });
+                ts.forEach(target.declarations, function (node) {
+                    error(node.name ? node.name : node, message_2, symbolToString(source));
+                });
+            }
+        }
+        function cloneSymbolTable(symbolTable) {
+            var result = {};
+            for (var id in symbolTable) {
+                if (ts.hasProperty(symbolTable, id)) {
+                    result[id] = symbolTable[id];
+                }
+            }
+            return result;
+        }
+        function mergeSymbolTable(target, source) {
+            for (var id in source) {
+                if (ts.hasProperty(source, id)) {
+                    if (!ts.hasProperty(target, id)) {
+                        target[id] = source[id];
+                    }
+                    else {
+                        var symbol = target[id];
+                        if (!(symbol.flags & 33554432 /* Merged */)) {
+                            target[id] = symbol = cloneSymbol(symbol);
+                        }
+                        mergeSymbol(symbol, source[id]);
+                    }
+                }
+            }
+        }
+        function mergeModuleAugmentation(moduleName) {
+            var moduleAugmentation = moduleName.parent;
+            if (moduleAugmentation.symbol.declarations[0] !== moduleAugmentation) {
+                // this is a combined symbol for multiple augmentations within the same file.
+                // its symbol already has accumulated information for all declarations
+                // so we need to add it just once - do the work only for first declaration
+                ts.Debug.assert(moduleAugmentation.symbol.declarations.length > 1);
+                return;
+            }
+            if (ts.isGlobalScopeAugmentation(moduleAugmentation)) {
+                mergeSymbolTable(globals, moduleAugmentation.symbol.exports);
+            }
+            else {
+                // find a module that about to be augmented
+                // do not validate names of augmentations that are defined in ambient context
+                var moduleNotFoundError = !ts.isInAmbientContext(moduleName.parent.parent)
+                    ? ts.Diagnostics.Invalid_module_name_in_augmentation_module_0_cannot_be_found
+                    : undefined;
+                var mainModule = resolveExternalModuleNameWorker(moduleName, moduleName, moduleNotFoundError);
+                if (!mainModule) {
+                    return;
+                }
+                // obtain item referenced by 'export='
+                mainModule = resolveExternalModuleSymbol(mainModule);
+                if (mainModule.flags & 1536 /* Namespace */) {
+                    // if module symbol has already been merged - it is safe to use it.
+                    // otherwise clone it
+                    mainModule = mainModule.flags & 33554432 /* Merged */ ? mainModule : cloneSymbol(mainModule);
+                    mergeSymbol(mainModule, moduleAugmentation.symbol);
+                }
+                else {
+                    error(moduleName, ts.Diagnostics.Cannot_augment_module_0_because_it_resolves_to_a_non_module_entity, moduleName.text);
+                }
+            }
+        }
+        function addToSymbolTable(target, source, message) {
+            for (var id in source) {
+                if (ts.hasProperty(source, id)) {
+                    if (ts.hasProperty(target, id)) {
+                        // Error on redeclarations
+                        ts.forEach(target[id].declarations, addDeclarationDiagnostic(id, message));
+                    }
+                    else {
+                        target[id] = source[id];
+                    }
+                }
+            }
+            function addDeclarationDiagnostic(id, message) {
+                return function (declaration) { return diagnostics.add(ts.createDiagnosticForNode(declaration, message, id)); };
+            }
+        }
+        function getSymbolLinks(symbol) {
+            if (symbol.flags & 67108864 /* Transient */)
+                return symbol;
+            var id = getSymbolId(symbol);
+            return symbolLinks[id] || (symbolLinks[id] = {});
+        }
+        function getNodeLinks(node) {
+            var nodeId = getNodeId(node);
+            return nodeLinks[nodeId] || (nodeLinks[nodeId] = {});
+        }
+        function isGlobalSourceFile(node) {
+            return node.kind === 256 /* SourceFile */ && !ts.isExternalOrCommonJsModule(node);
+        }
+        function getSymbol(symbols, name, meaning) {
+            if (meaning && ts.hasProperty(symbols, name)) {
+                var symbol = symbols[name];
+                ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
+                if (symbol.flags & meaning) {
+                    return symbol;
+                }
+                if (symbol.flags & 8388608 /* Alias */) {
+                    var target = resolveAlias(symbol);
+                    // Unknown symbol means an error occurred in alias resolution, treat it as positive answer to avoid cascading errors
+                    if (target === unknownSymbol || target.flags & meaning) {
+                        return symbol;
+                    }
+                }
+            }
+            // return undefined if we can't find a symbol.
+        }
+        /**
+         * Get symbols that represent parameter-property-declaration as parameter and as property declaration
+         * @param parameter a parameterDeclaration node
+         * @param parameterName a name of the parameter to get the symbols for.
+         * @return a tuple of two symbols
+         */
+        function getSymbolsOfParameterPropertyDeclaration(parameter, parameterName) {
+            var constructorDeclaration = parameter.parent;
+            var classDeclaration = parameter.parent.parent;
+            var parameterSymbol = getSymbol(constructorDeclaration.locals, parameterName, 107455 /* Value */);
+            var propertySymbol = getSymbol(classDeclaration.symbol.members, parameterName, 107455 /* Value */);
+            if (parameterSymbol && propertySymbol) {
+                return [parameterSymbol, propertySymbol];
+            }
+            ts.Debug.fail("There should exist two symbols, one as property declaration and one as parameter declaration");
+        }
+        function isBlockScopedNameDeclaredBeforeUse(declaration, usage) {
+            var declarationFile = ts.getSourceFileOfNode(declaration);
+            var useFile = ts.getSourceFileOfNode(usage);
+            if (declarationFile !== useFile) {
+                if (modulekind || (!compilerOptions.outFile && !compilerOptions.out)) {
+                    // nodes are in different files and order cannot be determines
+                    return true;
+                }
+                var sourceFiles = host.getSourceFiles();
+                return ts.indexOf(sourceFiles, declarationFile) <= ts.indexOf(sourceFiles, useFile);
+            }
+            if (declaration.pos <= usage.pos) {
+                // declaration is before usage
+                // still might be illegal if usage is in the initializer of the variable declaration
+                return declaration.kind !== 218 /* VariableDeclaration */ ||
+                    !isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage);
+            }
+            // declaration is after usage
+            // can be legal if usage is deferred (i.e. inside function or in initializer of instance property)
+            return isUsedInFunctionOrNonStaticProperty(declaration, usage);
+            function isImmediatelyUsedInInitializerOfBlockScopedVariable(declaration, usage) {
+                var container = ts.getEnclosingBlockScopeContainer(declaration);
+                switch (declaration.parent.parent.kind) {
+                    case 200 /* VariableStatement */:
+                    case 206 /* ForStatement */:
+                    case 208 /* ForOfStatement */:
+                        // variable statement/for/for-of statement case,
+                        // use site should not be inside variable declaration (initializer of declaration or binding element)
+                        if (isSameScopeDescendentOf(usage, declaration, container)) {
+                            return true;
+                        }
+                        break;
+                }
+                switch (declaration.parent.parent.kind) {
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                        // ForIn/ForOf case - use site should not be used in expression part
+                        if (isSameScopeDescendentOf(usage, declaration.parent.parent.expression, container)) {
+                            return true;
+                        }
+                }
+                return false;
+            }
+            function isUsedInFunctionOrNonStaticProperty(declaration, usage) {
+                var container = ts.getEnclosingBlockScopeContainer(declaration);
+                var current = usage;
+                while (current) {
+                    if (current === container) {
+                        return false;
+                    }
+                    if (ts.isFunctionLike(current)) {
+                        return true;
+                    }
+                    var initializerOfNonStaticProperty = current.parent &&
+                        current.parent.kind === 145 /* PropertyDeclaration */ &&
+                        (current.parent.flags & 32 /* Static */) === 0 &&
+                        current.parent.initializer === current;
+                    if (initializerOfNonStaticProperty) {
+                        return true;
+                    }
+                    current = current.parent;
+                }
+                return false;
+            }
+        }
+        // Resolve a given name for a given meaning at a given location. An error is reported if the name was not found and
+        // the nameNotFoundMessage argument is not undefined. Returns the resolved symbol, or undefined if no symbol with
+        // the given name can be found.
+        function resolveName(location, name, meaning, nameNotFoundMessage, nameArg) {
+            var result;
+            var lastLocation;
+            var propertyWithInvalidInitializer;
+            var errorLocation = location;
+            var grandparent;
+            var isInExternalModule = false;
+            loop: while (location) {
+                // Locals of a source file are not in scope (because they get merged into the global symbol table)
+                if (location.locals && !isGlobalSourceFile(location)) {
+                    if (result = getSymbol(location.locals, name, meaning)) {
+                        var useResult = true;
+                        if (ts.isFunctionLike(location) && lastLocation && lastLocation !== location.body) {
+                            // symbol lookup restrictions for function-like declarations
+                            // - Type parameters of a function are in scope in the entire function declaration, including the parameter
+                            //   list and return type. However, local types are only in scope in the function body.
+                            // - parameters are only in the scope of function body
+                            // This restriction does not apply to JSDoc comment types because they are parented
+                            // at a higher level than type parameters would normally be
+                            if (meaning & result.flags & 793056 /* Type */ && lastLocation.kind !== 273 /* JSDocComment */) {
+                                useResult = result.flags & 262144 /* TypeParameter */
+                                    ? lastLocation === location.type ||
+                                        lastLocation.kind === 142 /* Parameter */ ||
+                                        lastLocation.kind === 141 /* TypeParameter */
+                                    : false;
+                            }
+                            if (meaning & 107455 /* Value */ && result.flags & 1 /* FunctionScopedVariable */) {
+                                // parameters are visible only inside function body, parameter list and return type
+                                // technically for parameter list case here we might mix parameters and variables declared in function,
+                                // however it is detected separately when checking initializers of parameters
+                                // to make sure that they reference no variables declared after them.
+                                useResult =
+                                    lastLocation.kind === 142 /* Parameter */ ||
+                                        (lastLocation === location.type &&
+                                            result.valueDeclaration.kind === 142 /* Parameter */);
+                            }
+                        }
+                        if (useResult) {
+                            break loop;
+                        }
+                        else {
+                            result = undefined;
+                        }
+                    }
+                }
+                switch (location.kind) {
+                    case 256 /* SourceFile */:
+                        if (!ts.isExternalOrCommonJsModule(location))
+                            break;
+                        isInExternalModule = true;
+                    case 225 /* ModuleDeclaration */:
+                        var moduleExports = getSymbolOfNode(location).exports;
+                        if (location.kind === 256 /* SourceFile */ || ts.isAmbientModule(location)) {
+                            // It's an external module. First see if the module has an export default and if the local
+                            // name of that export default matches.
+                            if (result = moduleExports["default"]) {
+                                var localSymbol = ts.getLocalSymbolForExportDefault(result);
+                                if (localSymbol && (result.flags & meaning) && localSymbol.name === name) {
+                                    break loop;
+                                }
+                                result = undefined;
+                            }
+                            // Because of module/namespace merging, a module's exports are in scope,
+                            // yet we never want to treat an export specifier as putting a member in scope.
+                            // Therefore, if the name we find is purely an export specifier, it is not actually considered in scope.
+                            // Two things to note about this:
+                            //     1. We have to check this without calling getSymbol. The problem with calling getSymbol
+                            //        on an export specifier is that it might find the export specifier itself, and try to
+                            //        resolve it as an alias. This will cause the checker to consider the export specifier
+                            //        a circular alias reference when it might not be.
+                            //     2. We check === SymbolFlags.Alias in order to check that the symbol is *purely*
+                            //        an alias. If we used &, we'd be throwing out symbols that have non alias aspects,
+                            //        which is not the desired behavior.
+                            if (ts.hasProperty(moduleExports, name) &&
+                                moduleExports[name].flags === 8388608 /* Alias */ &&
+                                ts.getDeclarationOfKind(moduleExports[name], 238 /* ExportSpecifier */)) {
+                                break;
+                            }
+                        }
+                        if (result = getSymbol(moduleExports, name, meaning & 8914931 /* ModuleMember */)) {
+                            break loop;
+                        }
+                        break;
+                    case 224 /* EnumDeclaration */:
+                        if (result = getSymbol(getSymbolOfNode(location).exports, name, meaning & 8 /* EnumMember */)) {
+                            break loop;
+                        }
+                        break;
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                        // TypeScript 1.0 spec (April 2014): 8.4.1
+                        // Initializer expressions for instance member variables are evaluated in the scope
+                        // of the class constructor body but are not permitted to reference parameters or
+                        // local variables of the constructor. This effectively means that entities from outer scopes
+                        // by the same name as a constructor parameter or local variable are inaccessible
+                        // in initializer expressions for instance member variables.
+                        if (ts.isClassLike(location.parent) && !(location.flags & 32 /* Static */)) {
+                            var ctor = findConstructorDeclaration(location.parent);
+                            if (ctor && ctor.locals) {
+                                if (getSymbol(ctor.locals, name, meaning & 107455 /* Value */)) {
+                                    // Remember the property node, it will be used later to report appropriate error
+                                    propertyWithInvalidInitializer = location;
+                                }
+                            }
+                        }
+                        break;
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                    case 222 /* InterfaceDeclaration */:
+                        if (result = getSymbol(getSymbolOfNode(location).members, name, meaning & 793056 /* Type */)) {
+                            if (lastLocation && lastLocation.flags & 32 /* Static */) {
+                                // TypeScript 1.0 spec (April 2014): 3.4.1
+                                // The scope of a type parameter extends over the entire declaration with which the type
+                                // parameter list is associated, with the exception of static member declarations in classes.
+                                error(errorLocation, ts.Diagnostics.Static_members_cannot_reference_class_type_parameters);
+                                return undefined;
+                            }
+                            break loop;
+                        }
+                        if (location.kind === 192 /* ClassExpression */ && meaning & 32 /* Class */) {
+                            var className = location.name;
+                            if (className && name === className.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    // It is not legal to reference a class's own type parameters from a computed property name that
+                    // belongs to the class. For example:
+                    //
+                    //   function foo<T>() { return '' }
+                    //   class C<T> { // <-- Class's own type parameter T
+                    //       [foo<T>()]() { } // <-- Reference to T from class's own computed property
+                    //   }
+                    //
+                    case 140 /* ComputedPropertyName */:
+                        grandparent = location.parent.parent;
+                        if (ts.isClassLike(grandparent) || grandparent.kind === 222 /* InterfaceDeclaration */) {
+                            // A reference to this grandparent's type parameters would be an error
+                            if (result = getSymbol(getSymbolOfNode(grandparent).members, name, meaning & 793056 /* Type */)) {
+                                error(errorLocation, ts.Diagnostics.A_computed_property_name_cannot_reference_a_type_parameter_from_its_containing_type);
+                                return undefined;
+                            }
+                        }
+                        break;
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 148 /* Constructor */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 220 /* FunctionDeclaration */:
+                    case 180 /* ArrowFunction */:
+                        if (meaning & 3 /* Variable */ && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        break;
+                    case 179 /* FunctionExpression */:
+                        if (meaning & 3 /* Variable */ && name === "arguments") {
+                            result = argumentsSymbol;
+                            break loop;
+                        }
+                        if (meaning & 16 /* Function */) {
+                            var functionName = location.name;
+                            if (functionName && name === functionName.text) {
+                                result = location.symbol;
+                                break loop;
+                            }
+                        }
+                        break;
+                    case 143 /* Decorator */:
+                        // Decorators are resolved at the class declaration. Resolving at the parameter
+                        // or member would result in looking up locals in the method.
+                        //
+                        //   function y() {}
+                        //   class C {
+                        //       method(@y x, y) {} // <-- decorator y should be resolved at the class declaration, not the parameter.
+                        //   }
+                        //
+                        if (location.parent && location.parent.kind === 142 /* Parameter */) {
+                            location = location.parent;
+                        }
+                        //
+                        //   function y() {}
+                        //   class C {
+                        //       @y method(x, y) {} // <-- decorator y should be resolved at the class declaration, not the method.
+                        //   }
+                        //
+                        if (location.parent && ts.isClassElement(location.parent)) {
+                            location = location.parent;
+                        }
+                        break;
+                }
+                lastLocation = location;
+                location = location.parent;
+            }
+            if (!result) {
+                result = getSymbol(globals, name, meaning);
+            }
+            if (!result) {
+                if (nameNotFoundMessage) {
+                    if (!checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg)) {
+                        error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                    }
+                }
+                return undefined;
+            }
+            // Perform extra checks only if error reporting was requested
+            if (nameNotFoundMessage) {
+                if (propertyWithInvalidInitializer) {
+                    // We have a match, but the reference occurred within a property initializer and the identifier also binds
+                    // to a local variable in the constructor where the code will be emitted.
+                    var propertyName = propertyWithInvalidInitializer.name;
+                    error(errorLocation, ts.Diagnostics.Initializer_of_instance_member_variable_0_cannot_reference_identifier_1_declared_in_the_constructor, ts.declarationNameToString(propertyName), typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                    return undefined;
+                }
+                // Only check for block-scoped variable if we are looking for the
+                // name with variable meaning
+                //      For example,
+                //          declare module foo {
+                //              interface bar {}
+                //          }
+                //      const foo/*1*/: foo/*2*/.bar;
+                // The foo at /*1*/ and /*2*/ will share same symbol with two meaning
+                // block - scope variable and namespace module. However, only when we
+                // try to resolve name in /*1*/ which is used in variable position,
+                // we want to check for block- scoped
+                if (meaning & 2 /* BlockScopedVariable */) {
+                    var exportOrLocalSymbol = getExportSymbolOfValueSymbolIfExported(result);
+                    if (exportOrLocalSymbol.flags & 2 /* BlockScopedVariable */) {
+                        checkResolvedBlockScopedVariable(exportOrLocalSymbol, errorLocation);
+                    }
+                }
+                // If we're in an external module, we can't reference symbols created from UMD export declarations
+                if (result && isInExternalModule) {
+                    var decls = result.declarations;
+                    if (decls && decls.length === 1 && decls[0].kind === 228 /* NamespaceExportDeclaration */) {
+                        error(errorLocation, ts.Diagnostics.Identifier_0_must_be_imported_from_a_module, name);
+                    }
+                }
+            }
+            return result;
+        }
+        function checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) {
+            if (!errorLocation || (errorLocation.kind === 69 /* Identifier */ && (isTypeReferenceIdentifier(errorLocation)) || isInTypeQuery(errorLocation))) {
+                return false;
+            }
+            var container = ts.getThisContainer(errorLocation, /* includeArrowFunctions */ true);
+            var location = container;
+            while (location) {
+                if (ts.isClassLike(location.parent)) {
+                    var classSymbol = getSymbolOfNode(location.parent);
+                    if (!classSymbol) {
+                        break;
+                    }
+                    // Check to see if a static member exists.
+                    var constructorType = getTypeOfSymbol(classSymbol);
+                    if (getPropertyOfType(constructorType, name)) {
+                        error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_static_member_1_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg), symbolToString(classSymbol));
+                        return true;
+                    }
+                    // No static member is present.
+                    // Check if we're in an instance method and look for a relevant instance member.
+                    if (location === container && !(location.flags & 32 /* Static */)) {
+                        var instanceType = getDeclaredTypeOfSymbol(classSymbol).thisType;
+                        if (getPropertyOfType(instanceType, name)) {
+                            error(errorLocation, ts.Diagnostics.Cannot_find_name_0_Did_you_mean_the_instance_member_this_0, typeof nameArg === "string" ? nameArg : ts.declarationNameToString(nameArg));
+                            return true;
+                        }
+                    }
+                }
+                location = location.parent;
+            }
+            return false;
+        }
+        function checkResolvedBlockScopedVariable(result, errorLocation) {
+            ts.Debug.assert((result.flags & 2 /* BlockScopedVariable */) !== 0);
+            // Block-scoped variables cannot be used before their definition
+            var declaration = ts.forEach(result.declarations, function (d) { return ts.isBlockOrCatchScoped(d) ? d : undefined; });
+            ts.Debug.assert(declaration !== undefined, "Block-scoped variable declaration is undefined");
+            if (!isBlockScopedNameDeclaredBeforeUse(ts.getAncestor(declaration, 218 /* VariableDeclaration */), errorLocation)) {
+                error(errorLocation, ts.Diagnostics.Block_scoped_variable_0_used_before_its_declaration, ts.declarationNameToString(declaration.name));
+            }
+        }
+        /* Starting from 'initial' node walk up the parent chain until 'stopAt' node is reached.
+         * If at any point current node is equal to 'parent' node - return true.
+         * Return false if 'stopAt' node is reached or isFunctionLike(current) === true.
+         */
+        function isSameScopeDescendentOf(initial, parent, stopAt) {
+            if (!parent) {
+                return false;
+            }
+            for (var current = initial; current && current !== stopAt && !ts.isFunctionLike(current); current = current.parent) {
+                if (current === parent) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function getAnyImportSyntax(node) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                if (node.kind === 229 /* ImportEqualsDeclaration */) {
+                    return node;
+                }
+                while (node && node.kind !== 230 /* ImportDeclaration */) {
+                    node = node.parent;
+                }
+                return node;
+            }
+        }
+        function getDeclarationOfAliasSymbol(symbol) {
+            return ts.forEach(symbol.declarations, function (d) { return ts.isAliasSymbolDeclaration(d) ? d : undefined; });
+        }
+        function getTargetOfImportEqualsDeclaration(node) {
+            if (node.moduleReference.kind === 240 /* ExternalModuleReference */) {
+                return resolveExternalModuleSymbol(resolveExternalModuleName(node, ts.getExternalModuleImportEqualsDeclarationExpression(node)));
+            }
+            return getSymbolOfPartOfRightHandSideOfImportEquals(node.moduleReference, node);
+        }
+        function getTargetOfImportClause(node) {
+            var moduleSymbol = resolveExternalModuleName(node, node.parent.moduleSpecifier);
+            if (moduleSymbol) {
+                var exportDefaultSymbol = moduleSymbol.exports["export="] ?
+                    getPropertyOfType(getTypeOfSymbol(moduleSymbol.exports["export="]), "default") :
+                    resolveSymbol(moduleSymbol.exports["default"]);
+                if (!exportDefaultSymbol && !allowSyntheticDefaultImports) {
+                    error(node.name, ts.Diagnostics.Module_0_has_no_default_export, symbolToString(moduleSymbol));
+                }
+                else if (!exportDefaultSymbol && allowSyntheticDefaultImports) {
+                    return resolveExternalModuleSymbol(moduleSymbol) || resolveSymbol(moduleSymbol);
+                }
+                return exportDefaultSymbol;
+            }
+        }
+        function getTargetOfNamespaceImport(node) {
+            var moduleSpecifier = node.parent.parent.moduleSpecifier;
+            return resolveESModuleSymbol(resolveExternalModuleName(node, moduleSpecifier), moduleSpecifier);
+        }
+        // This function creates a synthetic symbol that combines the value side of one symbol with the
+        // type/namespace side of another symbol. Consider this example:
+        //
+        //   declare module graphics {
+        //       interface Point {
+        //           x: number;
+        //           y: number;
+        //       }
+        //   }
+        //   declare var graphics: {
+        //       Point: new (x: number, y: number) => graphics.Point;
+        //   }
+        //   declare module "graphics" {
+        //       export = graphics;
+        //   }
+        //
+        // An 'import { Point } from "graphics"' needs to create a symbol that combines the value side 'Point'
+        // property with the type/namespace side interface 'Point'.
+        function combineValueAndTypeSymbols(valueSymbol, typeSymbol) {
+            if (valueSymbol.flags & (793056 /* Type */ | 1536 /* Namespace */)) {
+                return valueSymbol;
+            }
+            var result = createSymbol(valueSymbol.flags | typeSymbol.flags, valueSymbol.name);
+            result.declarations = ts.concatenate(valueSymbol.declarations, typeSymbol.declarations);
+            result.parent = valueSymbol.parent || typeSymbol.parent;
+            if (valueSymbol.valueDeclaration)
+                result.valueDeclaration = valueSymbol.valueDeclaration;
+            if (typeSymbol.members)
+                result.members = typeSymbol.members;
+            if (valueSymbol.exports)
+                result.exports = valueSymbol.exports;
+            return result;
+        }
+        function getExportOfModule(symbol, name) {
+            if (symbol.flags & 1536 /* Module */) {
+                var exports = getExportsOfSymbol(symbol);
+                if (ts.hasProperty(exports, name)) {
+                    return resolveSymbol(exports[name]);
+                }
+            }
+        }
+        function getPropertyOfVariable(symbol, name) {
+            if (symbol.flags & 3 /* Variable */) {
+                var typeAnnotation = symbol.valueDeclaration.type;
+                if (typeAnnotation) {
+                    return resolveSymbol(getPropertyOfType(getTypeFromTypeNode(typeAnnotation), name));
+                }
+            }
+        }
+        function getExternalModuleMember(node, specifier) {
+            var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+            var targetSymbol = resolveESModuleSymbol(moduleSymbol, node.moduleSpecifier);
+            if (targetSymbol) {
+                var name_10 = specifier.propertyName || specifier.name;
+                if (name_10.text) {
+                    var symbolFromVariable = void 0;
+                    // First check if module was specified with "export=". If so, get the member from the resolved type
+                    if (moduleSymbol && moduleSymbol.exports && moduleSymbol.exports["export="]) {
+                        symbolFromVariable = getPropertyOfType(getTypeOfSymbol(targetSymbol), name_10.text);
+                    }
+                    else {
+                        symbolFromVariable = getPropertyOfVariable(targetSymbol, name_10.text);
+                    }
+                    // if symbolFromVariable is export - get its final target
+                    symbolFromVariable = resolveSymbol(symbolFromVariable);
+                    var symbolFromModule = getExportOfModule(targetSymbol, name_10.text);
+                    var symbol = symbolFromModule && symbolFromVariable ?
+                        combineValueAndTypeSymbols(symbolFromVariable, symbolFromModule) :
+                        symbolFromModule || symbolFromVariable;
+                    if (!symbol) {
+                        error(name_10, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(moduleSymbol), ts.declarationNameToString(name_10));
+                    }
+                    return symbol;
+                }
+            }
+        }
+        function getTargetOfImportSpecifier(node) {
+            return getExternalModuleMember(node.parent.parent.parent, node);
+        }
+        function getTargetOfGlobalModuleExportDeclaration(node) {
+            return resolveExternalModuleSymbol(node.parent.symbol);
+        }
+        function getTargetOfExportSpecifier(node) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node) :
+                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */);
+        }
+        function getTargetOfExportAssignment(node) {
+            return resolveEntityName(node.expression, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */);
+        }
+        function getTargetOfAliasDeclaration(node) {
+            switch (node.kind) {
+                case 229 /* ImportEqualsDeclaration */:
+                    return getTargetOfImportEqualsDeclaration(node);
+                case 231 /* ImportClause */:
+                    return getTargetOfImportClause(node);
+                case 232 /* NamespaceImport */:
+                    return getTargetOfNamespaceImport(node);
+                case 234 /* ImportSpecifier */:
+                    return getTargetOfImportSpecifier(node);
+                case 238 /* ExportSpecifier */:
+                    return getTargetOfExportSpecifier(node);
+                case 235 /* ExportAssignment */:
+                    return getTargetOfExportAssignment(node);
+                case 228 /* NamespaceExportDeclaration */:
+                    return getTargetOfGlobalModuleExportDeclaration(node);
+            }
+        }
+        function resolveSymbol(symbol) {
+            return symbol && symbol.flags & 8388608 /* Alias */ && !(symbol.flags & (107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */)) ? resolveAlias(symbol) : symbol;
+        }
+        function resolveAlias(symbol) {
+            ts.Debug.assert((symbol.flags & 8388608 /* Alias */) !== 0, "Should only get Alias here.");
+            var links = getSymbolLinks(symbol);
+            if (!links.target) {
+                links.target = resolvingSymbol;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                var target = getTargetOfAliasDeclaration(node);
+                if (links.target === resolvingSymbol) {
+                    links.target = target || unknownSymbol;
+                }
+                else {
+                    error(node, ts.Diagnostics.Circular_definition_of_import_alias_0, symbolToString(symbol));
+                }
+            }
+            else if (links.target === resolvingSymbol) {
+                links.target = unknownSymbol;
+            }
+            return links.target;
+        }
+        function markExportAsReferenced(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target) {
+                var markAlias = target === unknownSymbol ||
+                    ((target.flags & 107455 /* Value */) && !isConstEnumOrConstEnumOnlyModule(target));
+                if (markAlias) {
+                    markAliasSymbolAsReferenced(symbol);
+                }
+            }
+        }
+        // When an alias symbol is referenced, we need to mark the entity it references as referenced and in turn repeat that until
+        // we reach a non-alias or an exported entity (which is always considered referenced). We do this by checking the target of
+        // the alias as an expression (which recursively takes us back here if the target references another alias).
+        function markAliasSymbolAsReferenced(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.referenced) {
+                links.referenced = true;
+                var node = getDeclarationOfAliasSymbol(symbol);
+                if (node.kind === 235 /* ExportAssignment */) {
+                    // export default <symbol>
+                    checkExpressionCached(node.expression);
+                }
+                else if (node.kind === 238 /* ExportSpecifier */) {
+                    // export { <symbol> } or export { <symbol> as foo }
+                    checkExpressionCached(node.propertyName || node.name);
+                }
+                else if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    // import foo = <symbol>
+                    checkExpressionCached(node.moduleReference);
+                }
+            }
+        }
+        // This function is only for imports with entity names
+        function getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importDeclaration, dontResolveAlias) {
+            // There are three things we might try to look for. In the following examples,
+            // the search term is enclosed in |...|:
+            //
+            //     import a = |b|; // Namespace
+            //     import a = |b.c|; // Value, type, namespace
+            //     import a = |b.c|.d; // Namespace
+            if (entityName.kind === 69 /* Identifier */ && ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            // Check for case 1 and 3 in the above example
+            if (entityName.kind === 69 /* Identifier */ || entityName.parent.kind === 139 /* QualifiedName */) {
+                return resolveEntityName(entityName, 1536 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            }
+            else {
+                // Case 2 in above example
+                // entityName.kind could be a QualifiedName or a Missing identifier
+                ts.Debug.assert(entityName.parent.kind === 229 /* ImportEqualsDeclaration */);
+                return resolveEntityName(entityName, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */, /*ignoreErrors*/ false, dontResolveAlias);
+            }
+        }
+        function getFullyQualifiedName(symbol) {
+            return symbol.parent ? getFullyQualifiedName(symbol.parent) + "." + symbolToString(symbol) : symbolToString(symbol);
+        }
+        // Resolves a qualified name and any involved aliases
+        function resolveEntityName(name, meaning, ignoreErrors, dontResolveAlias) {
+            if (ts.nodeIsMissing(name)) {
+                return undefined;
+            }
+            var symbol;
+            if (name.kind === 69 /* Identifier */) {
+                var message = meaning === 1536 /* Namespace */ ? ts.Diagnostics.Cannot_find_namespace_0 : ts.Diagnostics.Cannot_find_name_0;
+                symbol = resolveName(name, name.text, meaning, ignoreErrors ? undefined : message, name);
+                if (!symbol) {
+                    return undefined;
+                }
+            }
+            else if (name.kind === 139 /* QualifiedName */ || name.kind === 172 /* PropertyAccessExpression */) {
+                var left = name.kind === 139 /* QualifiedName */ ? name.left : name.expression;
+                var right = name.kind === 139 /* QualifiedName */ ? name.right : name.name;
+                var namespace = resolveEntityName(left, 1536 /* Namespace */, ignoreErrors);
+                if (!namespace || namespace === unknownSymbol || ts.nodeIsMissing(right)) {
+                    return undefined;
+                }
+                symbol = getSymbol(getExportsOfSymbol(namespace), right.text, meaning);
+                if (!symbol) {
+                    if (!ignoreErrors) {
+                        error(right, ts.Diagnostics.Module_0_has_no_exported_member_1, getFullyQualifiedName(namespace), ts.declarationNameToString(right));
+                    }
+                    return undefined;
+                }
+            }
+            else {
+                ts.Debug.fail("Unknown entity name kind.");
+            }
+            ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0, "Should never get an instantiated symbol here.");
+            return (symbol.flags & meaning) || dontResolveAlias ? symbol : resolveAlias(symbol);
+        }
+        function resolveExternalModuleName(location, moduleReferenceExpression) {
+            return resolveExternalModuleNameWorker(location, moduleReferenceExpression, ts.Diagnostics.Cannot_find_module_0);
+        }
+        function resolveExternalModuleNameWorker(location, moduleReferenceExpression, moduleNotFoundError) {
+            if (moduleReferenceExpression.kind !== 9 /* StringLiteral */) {
+                return;
+            }
+            var moduleReferenceLiteral = moduleReferenceExpression;
+            // Module names are escaped in our symbol table.  However, string literal values aren't.
+            // Escape the name in the "require(...)" clause to ensure we find the right symbol.
+            var moduleName = ts.escapeIdentifier(moduleReferenceLiteral.text);
+            if (moduleName === undefined) {
+                return;
+            }
+            var isRelative = ts.isExternalModuleNameRelative(moduleName);
+            if (!isRelative) {
+                var symbol = getSymbol(globals, '"' + moduleName + '"', 512 /* ValueModule */);
+                if (symbol) {
+                    // merged symbol is module declaration symbol combined with all augmentations
+                    return getMergedSymbol(symbol);
+                }
+            }
+            var resolvedModule = ts.getResolvedModule(ts.getSourceFileOfNode(location), moduleReferenceLiteral.text);
+            var sourceFile = resolvedModule && host.getSourceFile(resolvedModule.resolvedFileName);
+            if (sourceFile) {
+                if (sourceFile.symbol) {
+                    // merged symbol is module declaration symbol combined with all augmentations
+                    return getMergedSymbol(sourceFile.symbol);
+                }
+                if (moduleNotFoundError) {
+                    // report errors only if it was requested
+                    error(moduleReferenceLiteral, ts.Diagnostics.File_0_is_not_a_module, sourceFile.fileName);
+                }
+                return undefined;
+            }
+            if (patternAmbientModules) {
+                var pattern = ts.findBestPatternMatch(patternAmbientModules, function (_) { return _.pattern; }, moduleName);
+                if (pattern) {
+                    return getMergedSymbol(pattern.symbol);
+                }
+            }
+            if (moduleNotFoundError) {
+                // report errors only if it was requested
+                error(moduleReferenceLiteral, moduleNotFoundError, moduleName);
+            }
+            return undefined;
+        }
+        // An external module with an 'export =' declaration resolves to the target of the 'export =' declaration,
+        // and an external module with no 'export =' declaration resolves to the module itself.
+        function resolveExternalModuleSymbol(moduleSymbol) {
+            return moduleSymbol && getMergedSymbol(resolveSymbol(moduleSymbol.exports["export="])) || moduleSymbol;
+        }
+        // An external module with an 'export =' declaration may be referenced as an ES6 module provided the 'export ='
+        // references a symbol that is at least declared as a module or a variable. The target of the 'export =' may
+        // combine other declarations with the module or variable (e.g. a class/module, function/module, interface/variable).
+        function resolveESModuleSymbol(moduleSymbol, moduleReferenceExpression) {
+            var symbol = resolveExternalModuleSymbol(moduleSymbol);
+            if (symbol && !(symbol.flags & (1536 /* Module */ | 3 /* Variable */))) {
+                error(moduleReferenceExpression, ts.Diagnostics.Module_0_resolves_to_a_non_module_entity_and_cannot_be_imported_using_this_construct, symbolToString(moduleSymbol));
+                symbol = undefined;
+            }
+            return symbol;
+        }
+        function hasExportAssignmentSymbol(moduleSymbol) {
+            return moduleSymbol.exports["export="] !== undefined;
+        }
+        function getExportsOfModuleAsArray(moduleSymbol) {
+            return symbolsToArray(getExportsOfModule(moduleSymbol));
+        }
+        function getExportsOfSymbol(symbol) {
+            return symbol.flags & 1536 /* Module */ ? getExportsOfModule(symbol) : symbol.exports || emptySymbols;
+        }
+        function getExportsOfModule(moduleSymbol) {
+            var links = getSymbolLinks(moduleSymbol);
+            return links.resolvedExports || (links.resolvedExports = getExportsForModule(moduleSymbol));
+        }
+        /**
+         * Extends one symbol table with another while collecting information on name collisions for error message generation into the `lookupTable` argument
+         * Not passing `lookupTable` and `exportNode` disables this collection, and just extends the tables
+         */
+        function extendExportSymbols(target, source, lookupTable, exportNode) {
+            for (var id in source) {
+                if (id !== "default" && !ts.hasProperty(target, id)) {
+                    target[id] = source[id];
+                    if (lookupTable && exportNode) {
+                        lookupTable[id] = {
+                            specifierText: ts.getTextOfNode(exportNode.moduleSpecifier)
+                        };
+                    }
+                }
+                else if (lookupTable && exportNode && id !== "default" && ts.hasProperty(target, id) && resolveSymbol(target[id]) !== resolveSymbol(source[id])) {
+                    if (!lookupTable[id].exportsWithDuplicate) {
+                        lookupTable[id].exportsWithDuplicate = [exportNode];
+                    }
+                    else {
+                        lookupTable[id].exportsWithDuplicate.push(exportNode);
+                    }
+                }
+            }
+        }
+        function getExportsForModule(moduleSymbol) {
+            var visitedSymbols = [];
+            return visit(moduleSymbol) || moduleSymbol.exports;
+            // The ES6 spec permits export * declarations in a module to circularly reference the module itself. For example,
+            // module 'a' can 'export * from "b"' and 'b' can 'export * from "a"' without error.
+            function visit(symbol) {
+                if (!(symbol && symbol.flags & 1952 /* HasExports */ && !ts.contains(visitedSymbols, symbol))) {
+                    return;
+                }
+                visitedSymbols.push(symbol);
+                var symbols = cloneSymbolTable(symbol.exports);
+                // All export * declarations are collected in an __export symbol by the binder
+                var exportStars = symbol.exports["__export"];
+                if (exportStars) {
+                    var nestedSymbols = {};
+                    var lookupTable = {};
+                    for (var _i = 0, _a = exportStars.declarations; _i < _a.length; _i++) {
+                        var node = _a[_i];
+                        var resolvedModule = resolveExternalModuleName(node, node.moduleSpecifier);
+                        var exportedSymbols = visit(resolvedModule);
+                        extendExportSymbols(nestedSymbols, exportedSymbols, lookupTable, node);
+                    }
+                    for (var id in lookupTable) {
+                        var exportsWithDuplicate = lookupTable[id].exportsWithDuplicate;
+                        // It's not an error if the file with multiple `export *`s with duplicate names exports a member with that name itself
+                        if (id === "export=" || !(exportsWithDuplicate && exportsWithDuplicate.length) || ts.hasProperty(symbols, id)) {
+                            continue;
+                        }
+                        for (var _b = 0, exportsWithDuplicate_1 = exportsWithDuplicate; _b < exportsWithDuplicate_1.length; _b++) {
+                            var node = exportsWithDuplicate_1[_b];
+                            diagnostics.add(ts.createDiagnosticForNode(node, ts.Diagnostics.Module_0_has_already_exported_a_member_named_1_Consider_explicitly_re_exporting_to_resolve_the_ambiguity, lookupTable[id].specifierText, id));
+                        }
+                    }
+                    extendExportSymbols(symbols, nestedSymbols);
+                }
+                return symbols;
+            }
+        }
+        function getMergedSymbol(symbol) {
+            var merged;
+            return symbol && symbol.mergeId && (merged = mergedSymbols[symbol.mergeId]) ? merged : symbol;
+        }
+        function getSymbolOfNode(node) {
+            return getMergedSymbol(node.symbol);
+        }
+        function getParentOfSymbol(symbol) {
+            return getMergedSymbol(symbol.parent);
+        }
+        function getExportSymbolOfValueSymbolIfExported(symbol) {
+            return symbol && (symbol.flags & 1048576 /* ExportValue */) !== 0
+                ? getMergedSymbol(symbol.exportSymbol)
+                : symbol;
+        }
+        function symbolIsValue(symbol) {
+            // If it is an instantiated symbol, then it is a value if the symbol it is an
+            // instantiation of is a value.
+            if (symbol.flags & 16777216 /* Instantiated */) {
+                return symbolIsValue(getSymbolLinks(symbol).target);
+            }
+            // If the symbol has the value flag, it is trivially a value.
+            if (symbol.flags & 107455 /* Value */) {
+                return true;
+            }
+            // If it is an alias, then it is a value if the symbol it resolves to is a value.
+            if (symbol.flags & 8388608 /* Alias */) {
+                return (resolveAlias(symbol).flags & 107455 /* Value */) !== 0;
+            }
+            return false;
+        }
+        function findConstructorDeclaration(node) {
+            var members = node.members;
+            for (var _i = 0, members_1 = members; _i < members_1.length; _i++) {
+                var member = members_1[_i];
+                if (member.kind === 148 /* Constructor */ && ts.nodeIsPresent(member.body)) {
+                    return member;
+                }
+            }
+        }
+        function createType(flags) {
+            var result = new Type(checker, flags);
+            result.id = typeCount;
+            typeCount++;
+            return result;
+        }
+        function createIntrinsicType(kind, intrinsicName) {
+            var type = createType(kind);
+            type.intrinsicName = intrinsicName;
+            return type;
+        }
+        function createObjectType(kind, symbol) {
+            var type = createType(kind);
+            type.symbol = symbol;
+            return type;
+        }
+        // A reserved member name starts with two underscores, but the third character cannot be an underscore
+        // or the @ symbol. A third underscore indicates an escaped form of an identifer that started
+        // with at least two underscores. The @ character indicates that the name is denoted by a well known ES
+        // Symbol instance.
+        function isReservedMemberName(name) {
+            return name.charCodeAt(0) === 95 /* _ */ &&
+                name.charCodeAt(1) === 95 /* _ */ &&
+                name.charCodeAt(2) !== 95 /* _ */ &&
+                name.charCodeAt(2) !== 64 /* at */;
+        }
+        function getNamedMembers(members) {
+            var result;
+            for (var id in members) {
+                if (ts.hasProperty(members, id)) {
+                    if (!isReservedMemberName(id)) {
+                        if (!result)
+                            result = [];
+                        var symbol = members[id];
+                        if (symbolIsValue(symbol)) {
+                            result.push(symbol);
+                        }
+                    }
+                }
+            }
+            return result || emptyArray;
+        }
+        function setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            type.members = members;
+            type.properties = getNamedMembers(members);
+            type.callSignatures = callSignatures;
+            type.constructSignatures = constructSignatures;
+            if (stringIndexInfo)
+                type.stringIndexInfo = stringIndexInfo;
+            if (numberIndexInfo)
+                type.numberIndexInfo = numberIndexInfo;
+            return type;
+        }
+        function createAnonymousType(symbol, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo) {
+            return setObjectTypeMembers(createObjectType(65536 /* Anonymous */, symbol), members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function forEachSymbolTableInScope(enclosingDeclaration, callback) {
+            var result;
+            for (var location_1 = enclosingDeclaration; location_1; location_1 = location_1.parent) {
+                // Locals of a source file are not in scope (because they get merged into the global symbol table)
+                if (location_1.locals && !isGlobalSourceFile(location_1)) {
+                    if (result = callback(location_1.locals)) {
+                        return result;
+                    }
+                }
+                switch (location_1.kind) {
+                    case 256 /* SourceFile */:
+                        if (!ts.isExternalOrCommonJsModule(location_1)) {
+                            break;
+                        }
+                    case 225 /* ModuleDeclaration */:
+                        if (result = callback(getSymbolOfNode(location_1).exports)) {
+                            return result;
+                        }
+                        break;
+                }
+            }
+            return callback(globals);
+        }
+        function getQualifiedLeftMeaning(rightMeaning) {
+            // If we are looking in value space, the parent meaning is value, other wise it is namespace
+            return rightMeaning === 107455 /* Value */ ? 107455 /* Value */ : 1536 /* Namespace */;
+        }
+        function getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, useOnlyExternalAliasing) {
+            function getAccessibleSymbolChainFromSymbolTable(symbols) {
+                function canQualifySymbol(symbolFromSymbolTable, meaning) {
+                    // If the symbol is equivalent and doesn't need further qualification, this symbol is accessible
+                    if (!needsQualification(symbolFromSymbolTable, enclosingDeclaration, meaning)) {
+                        return true;
+                    }
+                    // If symbol needs qualification, make sure that parent is accessible, if it is then this symbol is accessible too
+                    var accessibleParent = getAccessibleSymbolChain(symbolFromSymbolTable.parent, enclosingDeclaration, getQualifiedLeftMeaning(meaning), useOnlyExternalAliasing);
+                    return !!accessibleParent;
+                }
+                function isAccessible(symbolFromSymbolTable, resolvedAliasSymbol) {
+                    if (symbol === (resolvedAliasSymbol || symbolFromSymbolTable)) {
+                        // if the symbolFromSymbolTable is not external module (it could be if it was determined as ambient external module and would be in globals table)
+                        // and if symbolFromSymbolTable or alias resolution matches the symbol,
+                        // check the symbol can be qualified, it is only then this symbol is accessible
+                        return !ts.forEach(symbolFromSymbolTable.declarations, hasExternalModuleSymbol) &&
+                            canQualifySymbol(symbolFromSymbolTable, meaning);
+                    }
+                }
+                // If symbol is directly available by its name in the symbol table
+                if (isAccessible(ts.lookUp(symbols, symbol.name))) {
+                    return [symbol];
+                }
+                // Check if symbol is any of the alias
+                return ts.forEachValue(symbols, function (symbolFromSymbolTable) {
+                    if (symbolFromSymbolTable.flags & 8388608 /* Alias */
+                        && symbolFromSymbolTable.name !== "export="
+                        && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238 /* ExportSpecifier */)) {
+                        if (!useOnlyExternalAliasing ||
+                            // Is this external alias, then use it to name
+                            ts.forEach(symbolFromSymbolTable.declarations, ts.isExternalModuleImportEqualsDeclaration)) {
+                            var resolvedImportedSymbol = resolveAlias(symbolFromSymbolTable);
+                            if (isAccessible(symbolFromSymbolTable, resolveAlias(symbolFromSymbolTable))) {
+                                return [symbolFromSymbolTable];
+                            }
+                            // Look in the exported members, if we can find accessibleSymbolChain, symbol is accessible using this chain
+                            // but only if the symbolFromSymbolTable can be qualified
+                            var accessibleSymbolsFromExports = resolvedImportedSymbol.exports ? getAccessibleSymbolChainFromSymbolTable(resolvedImportedSymbol.exports) : undefined;
+                            if (accessibleSymbolsFromExports && canQualifySymbol(symbolFromSymbolTable, getQualifiedLeftMeaning(meaning))) {
+                                return [symbolFromSymbolTable].concat(accessibleSymbolsFromExports);
+                            }
+                        }
+                    }
+                });
+            }
+            if (symbol) {
+                if (!(isPropertyOrMethodDeclarationSymbol(symbol))) {
+                    return forEachSymbolTableInScope(enclosingDeclaration, getAccessibleSymbolChainFromSymbolTable);
+                }
+            }
+        }
+        function needsQualification(symbol, enclosingDeclaration, meaning) {
+            var qualify = false;
+            forEachSymbolTableInScope(enclosingDeclaration, function (symbolTable) {
+                // If symbol of this name is not available in the symbol table we are ok
+                if (!ts.hasProperty(symbolTable, symbol.name)) {
+                    // Continue to the next symbol table
+                    return false;
+                }
+                // If the symbol with this name is present it should refer to the symbol
+                var symbolFromSymbolTable = symbolTable[symbol.name];
+                if (symbolFromSymbolTable === symbol) {
+                    // No need to qualify
+                    return true;
+                }
+                // Qualify if the symbol from symbol table has same meaning as expected
+                symbolFromSymbolTable = (symbolFromSymbolTable.flags & 8388608 /* Alias */ && !ts.getDeclarationOfKind(symbolFromSymbolTable, 238 /* ExportSpecifier */)) ? resolveAlias(symbolFromSymbolTable) : symbolFromSymbolTable;
+                if (symbolFromSymbolTable.flags & meaning) {
+                    qualify = true;
+                    return true;
+                }
+                // Continue to the next symbol table
+                return false;
+            });
+            return qualify;
+        }
+        function isPropertyOrMethodDeclarationSymbol(symbol) {
+            if (symbol.declarations && symbol.declarations.length) {
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var declaration = _a[_i];
+                    switch (declaration.kind) {
+                        case 145 /* PropertyDeclaration */:
+                        case 147 /* MethodDeclaration */:
+                        case 149 /* GetAccessor */:
+                        case 150 /* SetAccessor */:
+                            continue;
+                        default:
+                            return false;
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function isSymbolAccessible(symbol, enclosingDeclaration, meaning) {
+            if (symbol && enclosingDeclaration && !(symbol.flags & 262144 /* TypeParameter */)) {
+                var initialSymbol = symbol;
+                var meaningToLook = meaning;
+                while (symbol) {
+                    // Symbol is accessible if it by itself is accessible
+                    var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaningToLook, /*useOnlyExternalAliasing*/ false);
+                    if (accessibleSymbolChain) {
+                        var hasAccessibleDeclarations = hasVisibleDeclarations(accessibleSymbolChain[0]);
+                        if (!hasAccessibleDeclarations) {
+                            return {
+                                accessibility: 1 /* NotAccessible */,
+                                errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                                errorModuleName: symbol !== initialSymbol ? symbolToString(symbol, enclosingDeclaration, 1536 /* Namespace */) : undefined
+                            };
+                        }
+                        return hasAccessibleDeclarations;
+                    }
+                    // If we haven't got the accessible symbol, it doesn't mean the symbol is actually inaccessible.
+                    // It could be a qualified symbol and hence verify the path
+                    // e.g.:
+                    // module m {
+                    //     export class c {
+                    //     }
+                    // }
+                    // const x: typeof m.c
+                    // In the above example when we start with checking if typeof m.c symbol is accessible,
+                    // we are going to see if c can be accessed in scope directly.
+                    // But it can't, hence the accessible is going to be undefined, but that doesn't mean m.c is inaccessible
+                    // It is accessible if the parent m is accessible because then m.c can be accessed through qualification
+                    meaningToLook = getQualifiedLeftMeaning(meaning);
+                    symbol = getParentOfSymbol(symbol);
+                }
+                // This could be a symbol that is not exported in the external module
+                // or it could be a symbol from different external module that is not aliased and hence cannot be named
+                var symbolExternalModule = ts.forEach(initialSymbol.declarations, getExternalModuleContainer);
+                if (symbolExternalModule) {
+                    var enclosingExternalModule = getExternalModuleContainer(enclosingDeclaration);
+                    if (symbolExternalModule !== enclosingExternalModule) {
+                        // name from different external module that is not visible
+                        return {
+                            accessibility: 2 /* CannotBeNamed */,
+                            errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning),
+                            errorModuleName: symbolToString(symbolExternalModule)
+                        };
+                    }
+                }
+                // Just a local name that is not accessible
+                return {
+                    accessibility: 1 /* NotAccessible */,
+                    errorSymbolName: symbolToString(initialSymbol, enclosingDeclaration, meaning)
+                };
+            }
+            return { accessibility: 0 /* Accessible */ };
+            function getExternalModuleContainer(declaration) {
+                for (; declaration; declaration = declaration.parent) {
+                    if (hasExternalModuleSymbol(declaration)) {
+                        return getSymbolOfNode(declaration);
+                    }
+                }
+            }
+        }
+        function hasExternalModuleSymbol(declaration) {
+            return ts.isAmbientModule(declaration) || (declaration.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(declaration));
+        }
+        function hasVisibleDeclarations(symbol) {
+            var aliasesToMakeVisible;
+            if (ts.forEach(symbol.declarations, function (declaration) { return !getIsDeclarationVisible(declaration); })) {
+                return undefined;
+            }
+            return { accessibility: 0 /* Accessible */, aliasesToMakeVisible: aliasesToMakeVisible };
+            function getIsDeclarationVisible(declaration) {
+                if (!isDeclarationVisible(declaration)) {
+                    // Mark the unexported alias as visible if its parent is visible
+                    // because these kind of aliases can be used to name types in declaration file
+                    var anyImportSyntax = getAnyImportSyntax(declaration);
+                    if (anyImportSyntax &&
+                        !(anyImportSyntax.flags & 1 /* Export */) &&
+                        isDeclarationVisible(anyImportSyntax.parent)) {
+                        getNodeLinks(declaration).isVisible = true;
+                        if (aliasesToMakeVisible) {
+                            if (!ts.contains(aliasesToMakeVisible, anyImportSyntax)) {
+                                aliasesToMakeVisible.push(anyImportSyntax);
+                            }
+                        }
+                        else {
+                            aliasesToMakeVisible = [anyImportSyntax];
+                        }
+                        return true;
+                    }
+                    // Declaration is not visible
+                    return false;
+                }
+                return true;
+            }
+        }
+        function isEntityNameVisible(entityName, enclosingDeclaration) {
+            // get symbol of the first identifier of the entityName
+            var meaning;
+            if (entityName.parent.kind === 158 /* TypeQuery */ || ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                // Typeof value
+                meaning = 107455 /* Value */ | 1048576 /* ExportValue */;
+            }
+            else if (entityName.kind === 139 /* QualifiedName */ || entityName.kind === 172 /* PropertyAccessExpression */ ||
+                entityName.parent.kind === 229 /* ImportEqualsDeclaration */) {
+                // Left identifier from type reference or TypeAlias
+                // Entity name of the import declaration
+                meaning = 1536 /* Namespace */;
+            }
+            else {
+                // Type Reference or TypeAlias entity = Identifier
+                meaning = 793056 /* Type */;
+            }
+            var firstIdentifier = getFirstIdentifier(entityName);
+            var symbol = resolveName(enclosingDeclaration, firstIdentifier.text, meaning, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
+            // Verify if the symbol is accessible
+            return (symbol && hasVisibleDeclarations(symbol)) || {
+                accessibility: 1 /* NotAccessible */,
+                errorSymbolName: ts.getTextOfNode(firstIdentifier),
+                errorNode: firstIdentifier
+            };
+        }
+        function writeKeyword(writer, kind) {
+            writer.writeKeyword(ts.tokenToString(kind));
+        }
+        function writePunctuation(writer, kind) {
+            writer.writePunctuation(ts.tokenToString(kind));
+        }
+        function writeSpace(writer) {
+            writer.writeSpace(" ");
+        }
+        function symbolToString(symbol, enclosingDeclaration, meaning) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function signatureToString(signature, enclosingDeclaration, flags, kind) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function typeToString(type, enclosingDeclaration, flags) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            var maxLength = compilerOptions.noErrorTruncation || flags & 4 /* NoTruncation */ ? undefined : 100;
+            if (maxLength && result.length >= maxLength) {
+                result = result.substr(0, maxLength - "...".length) + "...";
+            }
+            return result;
+        }
+        function typePredicateToString(typePredicate, enclosingDeclaration, flags) {
+            var writer = ts.getSingleLineStringWriter();
+            getSymbolDisplayBuilder().buildTypePredicateDisplay(typePredicate, writer, enclosingDeclaration, flags);
+            var result = writer.string();
+            ts.releaseStringWriter(writer);
+            return result;
+        }
+        function visibilityToString(flags) {
+            if (flags === 8 /* Private */) {
+                return "private";
+            }
+            if (flags === 16 /* Protected */) {
+                return "protected";
+            }
+            return "public";
+        }
+        function getTypeAliasForTypeLiteral(type) {
+            if (type.symbol && type.symbol.flags & 2048 /* TypeLiteral */) {
+                var node = type.symbol.declarations[0].parent;
+                while (node.kind === 164 /* ParenthesizedType */) {
+                    node = node.parent;
+                }
+                if (node.kind === 223 /* TypeAliasDeclaration */) {
+                    return getSymbolOfNode(node);
+                }
+            }
+            return undefined;
+        }
+        function isTopLevelInExternalModuleAugmentation(node) {
+            return node && node.parent &&
+                node.parent.kind === 226 /* ModuleBlock */ &&
+                ts.isExternalModuleAugmentation(node.parent.parent);
+        }
+        function getSymbolDisplayBuilder() {
+            function getNameOfSymbol(symbol) {
+                if (symbol.declarations && symbol.declarations.length) {
+                    var declaration = symbol.declarations[0];
+                    if (declaration.name) {
+                        return ts.declarationNameToString(declaration.name);
+                    }
+                    switch (declaration.kind) {
+                        case 192 /* ClassExpression */:
+                            return "(Anonymous class)";
+                        case 179 /* FunctionExpression */:
+                        case 180 /* ArrowFunction */:
+                            return "(Anonymous function)";
+                    }
+                }
+                return symbol.name;
+            }
+            /**
+             * Writes only the name of the symbol out to the writer. Uses the original source text
+             * for the name of the symbol if it is available to match how the user wrote the name.
+             */
+            function appendSymbolNameOnly(symbol, writer) {
+                writer.writeSymbol(getNameOfSymbol(symbol), symbol);
+            }
+            /**
+             * Writes a property access or element access with the name of the symbol out to the writer.
+             * Uses the original source text for the name of the symbol if it is available to match how the user wrote the name,
+             * ensuring that any names written with literals use element accesses.
+             */
+            function appendPropertyOrElementAccessForSymbol(symbol, writer) {
+                var symbolName = getNameOfSymbol(symbol);
+                var firstChar = symbolName.charCodeAt(0);
+                var needsElementAccess = !ts.isIdentifierStart(firstChar, languageVersion);
+                if (needsElementAccess) {
+                    writePunctuation(writer, 19 /* OpenBracketToken */);
+                    if (ts.isSingleOrDoubleQuote(firstChar)) {
+                        writer.writeStringLiteral(symbolName);
+                    }
+                    else {
+                        writer.writeSymbol(symbolName, symbol);
+                    }
+                    writePunctuation(writer, 20 /* CloseBracketToken */);
+                }
+                else {
+                    writePunctuation(writer, 21 /* DotToken */);
+                    writer.writeSymbol(symbolName, symbol);
+                }
+            }
+            /**
+             * Enclosing declaration is optional when we don't want to get qualified name in the enclosing declaration scope
+             * Meaning needs to be specified if the enclosing declaration is given
+             */
+            function buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags, typeFlags) {
+                var parentSymbol;
+                function appendParentTypeArgumentsAndSymbolName(symbol) {
+                    if (parentSymbol) {
+                        // Write type arguments of instantiated class/interface here
+                        if (flags & 1 /* WriteTypeParametersOrArguments */) {
+                            if (symbol.flags & 16777216 /* Instantiated */) {
+                                buildDisplayForTypeArgumentsAndDelimiters(getTypeParametersOfClassOrInterface(parentSymbol), symbol.mapper, writer, enclosingDeclaration);
+                            }
+                            else {
+                                buildTypeParameterDisplayFromSymbol(parentSymbol, writer, enclosingDeclaration);
+                            }
+                        }
+                        appendPropertyOrElementAccessForSymbol(symbol, writer);
+                    }
+                    else {
+                        appendSymbolNameOnly(symbol, writer);
+                    }
+                    parentSymbol = symbol;
+                }
+                // const the writer know we just wrote out a symbol.  The declaration emitter writer uses
+                // this to determine if an import it has previously seen (and not written out) needs
+                // to be written to the file once the walk of the tree is complete.
+                //
+                // NOTE(cyrusn): This approach feels somewhat unfortunate.  A simple pass over the tree
+                // up front (for example, during checking) could determine if we need to emit the imports
+                // and we could then access that data during declaration emit.
+                writer.trackSymbol(symbol, enclosingDeclaration, meaning);
+                function walkSymbol(symbol, meaning) {
+                    if (symbol) {
+                        var accessibleSymbolChain = getAccessibleSymbolChain(symbol, enclosingDeclaration, meaning, !!(flags & 2 /* UseOnlyExternalAliasing */));
+                        if (!accessibleSymbolChain ||
+                            needsQualification(accessibleSymbolChain[0], enclosingDeclaration, accessibleSymbolChain.length === 1 ? meaning : getQualifiedLeftMeaning(meaning))) {
+                            // Go up and add our parent.
+                            walkSymbol(getParentOfSymbol(accessibleSymbolChain ? accessibleSymbolChain[0] : symbol), getQualifiedLeftMeaning(meaning));
+                        }
+                        if (accessibleSymbolChain) {
+                            for (var _i = 0, accessibleSymbolChain_1 = accessibleSymbolChain; _i < accessibleSymbolChain_1.length; _i++) {
+                                var accessibleSymbol = accessibleSymbolChain_1[_i];
+                                appendParentTypeArgumentsAndSymbolName(accessibleSymbol);
+                            }
+                        }
+                        else {
+                            // If we didn't find accessible symbol chain for this symbol, break if this is external module
+                            if (!parentSymbol && ts.forEach(symbol.declarations, hasExternalModuleSymbol)) {
+                                return;
+                            }
+                            // if this is anonymous type break
+                            if (symbol.flags & 2048 /* TypeLiteral */ || symbol.flags & 4096 /* ObjectLiteral */) {
+                                return;
+                            }
+                            appendParentTypeArgumentsAndSymbolName(symbol);
+                        }
+                    }
+                }
+                // Get qualified name if the symbol is not a type parameter
+                // and there is an enclosing declaration or we specifically
+                // asked for it
+                var isTypeParameter = symbol.flags & 262144 /* TypeParameter */;
+                var typeFormatFlag = 128 /* UseFullyQualifiedType */ & typeFlags;
+                if (!isTypeParameter && (enclosingDeclaration || typeFormatFlag)) {
+                    walkSymbol(symbol, meaning);
+                    return;
+                }
+                return appendParentTypeArgumentsAndSymbolName(symbol);
+            }
+            function buildTypeDisplay(type, writer, enclosingDeclaration, globalFlags, symbolStack) {
+                var globalFlagsToPass = globalFlags & 16 /* WriteOwnNameForAnyLike */;
+                var inObjectTypeLiteral = false;
+                return writeType(type, globalFlags);
+                function writeType(type, flags) {
+                    // Write undefined/null type as any
+                    if (type.flags & 150995071 /* Intrinsic */) {
+                        // Special handling for unknown / resolving types, they should show up as any and not unknown or __resolving
+                        writer.writeKeyword(!(globalFlags & 16 /* WriteOwnNameForAnyLike */) && isTypeAny(type)
+                            ? "any"
+                            : type.intrinsicName);
+                    }
+                    else if (type.flags & 33554432 /* ThisType */) {
+                        if (inObjectTypeLiteral) {
+                            writer.reportInaccessibleThisError();
+                        }
+                        writer.writeKeyword("this");
+                    }
+                    else if (type.flags & 4096 /* Reference */) {
+                        writeTypeReference(type, flags);
+                    }
+                    else if (type.flags & (1024 /* Class */ | 2048 /* Interface */ | 128 /* Enum */ | 512 /* TypeParameter */)) {
+                        // The specified symbol flags need to be reinterpreted as type flags
+                        buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 793056 /* Type */, 0 /* None */, flags);
+                    }
+                    else if (type.flags & 8192 /* Tuple */) {
+                        writeTupleType(type);
+                    }
+                    else if (type.flags & 49152 /* UnionOrIntersection */) {
+                        writeUnionOrIntersectionType(type, flags);
+                    }
+                    else if (type.flags & 65536 /* Anonymous */) {
+                        writeAnonymousType(type, flags);
+                    }
+                    else if (type.flags & 256 /* StringLiteral */) {
+                        writer.writeStringLiteral("\"" + ts.escapeString(type.text) + "\"");
+                    }
+                    else {
+                        // Should never get here
+                        // { ... }
+                        writePunctuation(writer, 15 /* OpenBraceToken */);
+                        writeSpace(writer);
+                        writePunctuation(writer, 22 /* DotDotDotToken */);
+                        writeSpace(writer);
+                        writePunctuation(writer, 16 /* CloseBraceToken */);
+                    }
+                }
+                function writeTypeList(types, delimiter) {
+                    for (var i = 0; i < types.length; i++) {
+                        if (i > 0) {
+                            if (delimiter !== 24 /* CommaToken */) {
+                                writeSpace(writer);
+                            }
+                            writePunctuation(writer, delimiter);
+                            writeSpace(writer);
+                        }
+                        writeType(types[i], delimiter === 24 /* CommaToken */ ? 0 /* None */ : 64 /* InElementType */);
+                    }
+                }
+                function writeSymbolTypeReference(symbol, typeArguments, pos, end, flags) {
+                    // Unnamed function expressions and arrow functions have reserved names that we don't want to display
+                    if (symbol.flags & 32 /* Class */ || !isReservedMemberName(symbol.name)) {
+                        buildSymbolDisplay(symbol, writer, enclosingDeclaration, 793056 /* Type */, 0 /* None */, flags);
+                    }
+                    if (pos < end) {
+                        writePunctuation(writer, 25 /* LessThanToken */);
+                        writeType(typeArguments[pos], 256 /* InFirstTypeArgument */);
+                        pos++;
+                        while (pos < end) {
+                            writePunctuation(writer, 24 /* CommaToken */);
+                            writeSpace(writer);
+                            writeType(typeArguments[pos], 0 /* None */);
+                            pos++;
+                        }
+                        writePunctuation(writer, 27 /* GreaterThanToken */);
+                    }
+                }
+                function writeTypeReference(type, flags) {
+                    var typeArguments = type.typeArguments || emptyArray;
+                    if (type.target === globalArrayType && !(flags & 1 /* WriteArrayAsGenericType */)) {
+                        writeType(typeArguments[0], 64 /* InElementType */);
+                        writePunctuation(writer, 19 /* OpenBracketToken */);
+                        writePunctuation(writer, 20 /* CloseBracketToken */);
+                    }
+                    else {
+                        // Write the type reference in the format f<A>.g<B>.C<X, Y> where A and B are type arguments
+                        // for outer type parameters, and f and g are the respective declaring containers of those
+                        // type parameters.
+                        var outerTypeParameters = type.target.outerTypeParameters;
+                        var i = 0;
+                        if (outerTypeParameters) {
+                            var length_1 = outerTypeParameters.length;
+                            while (i < length_1) {
+                                // Find group of type arguments for type parameters with the same declaring container.
+                                var start = i;
+                                var parent_7 = getParentSymbolOfTypeParameter(outerTypeParameters[i]);
+                                do {
+                                    i++;
+                                } while (i < length_1 && getParentSymbolOfTypeParameter(outerTypeParameters[i]) === parent_7);
+                                // When type parameters are their own type arguments for the whole group (i.e. we have
+                                // the default outer type arguments), we don't show the group.
+                                if (!ts.rangeEquals(outerTypeParameters, typeArguments, start, i)) {
+                                    writeSymbolTypeReference(parent_7, typeArguments, start, i, flags);
+                                    writePunctuation(writer, 21 /* DotToken */);
+                                }
+                            }
+                        }
+                        var typeParameterCount = (type.target.typeParameters || emptyArray).length;
+                        writeSymbolTypeReference(type.symbol, typeArguments, i, typeParameterCount, flags);
+                    }
+                }
+                function writeTupleType(type) {
+                    writePunctuation(writer, 19 /* OpenBracketToken */);
+                    writeTypeList(type.elementTypes, 24 /* CommaToken */);
+                    writePunctuation(writer, 20 /* CloseBracketToken */);
+                }
+                function writeUnionOrIntersectionType(type, flags) {
+                    if (flags & 64 /* InElementType */) {
+                        writePunctuation(writer, 17 /* OpenParenToken */);
+                    }
+                    writeTypeList(type.types, type.flags & 16384 /* Union */ ? 47 /* BarToken */ : 46 /* AmpersandToken */);
+                    if (flags & 64 /* InElementType */) {
+                        writePunctuation(writer, 18 /* CloseParenToken */);
+                    }
+                }
+                function writeAnonymousType(type, flags) {
+                    var symbol = type.symbol;
+                    if (symbol) {
+                        // Always use 'typeof T' for type of class, enum, and module objects
+                        if (symbol.flags & (32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (shouldWriteTypeOfFunctionSymbol()) {
+                            writeTypeOfSymbol(type, flags);
+                        }
+                        else if (ts.contains(symbolStack, symbol)) {
+                            // If type is an anonymous type literal in a type alias declaration, use type alias name
+                            var typeAlias = getTypeAliasForTypeLiteral(type);
+                            if (typeAlias) {
+                                // The specified symbol flags need to be reinterpreted as type flags
+                                buildSymbolDisplay(typeAlias, writer, enclosingDeclaration, 793056 /* Type */, 0 /* None */, flags);
+                            }
+                            else {
+                                // Recursive usage, use any
+                                writeKeyword(writer, 117 /* AnyKeyword */);
+                            }
+                        }
+                        else {
+                            // Since instantiations of the same anonymous type have the same symbol, tracking symbols instead
+                            // of types allows us to catch circular references to instantiations of the same anonymous type
+                            if (!symbolStack) {
+                                symbolStack = [];
+                            }
+                            symbolStack.push(symbol);
+                            writeLiteralType(type, flags);
+                            symbolStack.pop();
+                        }
+                    }
+                    else {
+                        // Anonymous types with no symbol are never circular
+                        writeLiteralType(type, flags);
+                    }
+                    function shouldWriteTypeOfFunctionSymbol() {
+                        var isStaticMethodSymbol = !!(symbol.flags & 8192 /* Method */ &&
+                            ts.forEach(symbol.declarations, function (declaration) { return declaration.flags & 32 /* Static */; }));
+                        var isNonLocalFunctionSymbol = !!(symbol.flags & 16 /* Function */) &&
+                            (symbol.parent ||
+                                ts.forEach(symbol.declarations, function (declaration) {
+                                    return declaration.parent.kind === 256 /* SourceFile */ || declaration.parent.kind === 226 /* ModuleBlock */;
+                                }));
+                        if (isStaticMethodSymbol || isNonLocalFunctionSymbol) {
+                            // typeof is allowed only for static/non local functions
+                            return !!(flags & 2 /* UseTypeOfFunction */) ||
+                                (ts.contains(symbolStack, symbol)); // it is type of the symbol uses itself recursively
+                        }
+                    }
+                }
+                function writeTypeOfSymbol(type, typeFormatFlags) {
+                    writeKeyword(writer, 101 /* TypeOfKeyword */);
+                    writeSpace(writer);
+                    buildSymbolDisplay(type.symbol, writer, enclosingDeclaration, 107455 /* Value */, 0 /* None */, typeFormatFlags);
+                }
+                function writeIndexSignature(info, keyword) {
+                    if (info) {
+                        if (info.isReadonly) {
+                            writeKeyword(writer, 128 /* ReadonlyKeyword */);
+                            writeSpace(writer);
+                        }
+                        writePunctuation(writer, 19 /* OpenBracketToken */);
+                        writer.writeParameter(info.declaration ? ts.declarationNameToString(info.declaration.parameters[0].name) : "x");
+                        writePunctuation(writer, 54 /* ColonToken */);
+                        writeSpace(writer);
+                        writeKeyword(writer, keyword);
+                        writePunctuation(writer, 20 /* CloseBracketToken */);
+                        writePunctuation(writer, 54 /* ColonToken */);
+                        writeSpace(writer);
+                        writeType(info.type, 0 /* None */);
+                        writePunctuation(writer, 23 /* SemicolonToken */);
+                        writer.writeLine();
+                    }
+                }
+                function writePropertyWithModifiers(prop) {
+                    if (isReadonlySymbol(prop)) {
+                        writeKeyword(writer, 128 /* ReadonlyKeyword */);
+                        writeSpace(writer);
+                    }
+                    buildSymbolDisplay(prop, writer);
+                    if (prop.flags & 536870912 /* Optional */) {
+                        writePunctuation(writer, 53 /* QuestionToken */);
+                    }
+                }
+                function shouldAddParenthesisAroundFunctionType(callSignature, flags) {
+                    if (flags & 64 /* InElementType */) {
+                        return true;
+                    }
+                    else if (flags & 256 /* InFirstTypeArgument */) {
+                        // Add parenthesis around function type for the first type argument to avoid ambiguity
+                        var typeParameters = callSignature.target && (flags & 32 /* WriteTypeArgumentsOfSignature */) ?
+                            callSignature.target.typeParameters : callSignature.typeParameters;
+                        return typeParameters && typeParameters.length !== 0;
+                    }
+                    return false;
+                }
+                function writeLiteralType(type, flags) {
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if (!resolved.properties.length && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                        if (!resolved.callSignatures.length && !resolved.constructSignatures.length) {
+                            writePunctuation(writer, 15 /* OpenBraceToken */);
+                            writePunctuation(writer, 16 /* CloseBraceToken */);
+                            return;
+                        }
+                        if (resolved.callSignatures.length === 1 && !resolved.constructSignatures.length) {
+                            var parenthesizeSignature = shouldAddParenthesisAroundFunctionType(resolved.callSignatures[0], flags);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 17 /* OpenParenToken */);
+                            }
+                            buildSignatureDisplay(resolved.callSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
+                            if (parenthesizeSignature) {
+                                writePunctuation(writer, 18 /* CloseParenToken */);
+                            }
+                            return;
+                        }
+                        if (resolved.constructSignatures.length === 1 && !resolved.callSignatures.length) {
+                            if (flags & 64 /* InElementType */) {
+                                writePunctuation(writer, 17 /* OpenParenToken */);
+                            }
+                            writeKeyword(writer, 92 /* NewKeyword */);
+                            writeSpace(writer);
+                            buildSignatureDisplay(resolved.constructSignatures[0], writer, enclosingDeclaration, globalFlagsToPass | 8 /* WriteArrowStyleSignature */, /*kind*/ undefined, symbolStack);
+                            if (flags & 64 /* InElementType */) {
+                                writePunctuation(writer, 18 /* CloseParenToken */);
+                            }
+                            return;
+                        }
+                    }
+                    var saveInObjectTypeLiteral = inObjectTypeLiteral;
+                    inObjectTypeLiteral = true;
+                    writePunctuation(writer, 15 /* OpenBraceToken */);
+                    writer.writeLine();
+                    writer.increaseIndent();
+                    for (var _i = 0, _a = resolved.callSignatures; _i < _a.length; _i++) {
+                        var signature = _a[_i];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
+                        writePunctuation(writer, 23 /* SemicolonToken */);
+                        writer.writeLine();
+                    }
+                    for (var _b = 0, _c = resolved.constructSignatures; _b < _c.length; _b++) {
+                        var signature = _c[_b];
+                        buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, 1 /* Construct */, symbolStack);
+                        writePunctuation(writer, 23 /* SemicolonToken */);
+                        writer.writeLine();
+                    }
+                    writeIndexSignature(resolved.stringIndexInfo, 132 /* StringKeyword */);
+                    writeIndexSignature(resolved.numberIndexInfo, 130 /* NumberKeyword */);
+                    for (var _d = 0, _e = resolved.properties; _d < _e.length; _d++) {
+                        var p = _e[_d];
+                        var t = getTypeOfSymbol(p);
+                        if (p.flags & (16 /* Function */ | 8192 /* Method */) && !getPropertiesOfObjectType(t).length) {
+                            var signatures = getSignaturesOfType(t, 0 /* Call */);
+                            for (var _f = 0, signatures_1 = signatures; _f < signatures_1.length; _f++) {
+                                var signature = signatures_1[_f];
+                                writePropertyWithModifiers(p);
+                                buildSignatureDisplay(signature, writer, enclosingDeclaration, globalFlagsToPass, /*kind*/ undefined, symbolStack);
+                                writePunctuation(writer, 23 /* SemicolonToken */);
+                                writer.writeLine();
+                            }
+                        }
+                        else {
+                            writePropertyWithModifiers(p);
+                            writePunctuation(writer, 54 /* ColonToken */);
+                            writeSpace(writer);
+                            writeType(t, 0 /* None */);
+                            writePunctuation(writer, 23 /* SemicolonToken */);
+                            writer.writeLine();
+                        }
+                    }
+                    writer.decreaseIndent();
+                    writePunctuation(writer, 16 /* CloseBraceToken */);
+                    inObjectTypeLiteral = saveInObjectTypeLiteral;
+                }
+            }
+            function buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration, flags) {
+                var targetSymbol = getTargetSymbol(symbol);
+                if (targetSymbol.flags & 32 /* Class */ || targetSymbol.flags & 64 /* Interface */ || targetSymbol.flags & 524288 /* TypeAlias */) {
+                    buildDisplayForTypeParametersAndDelimiters(getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol), writer, enclosingDeclaration, flags);
+                }
+            }
+            function buildTypeParameterDisplay(tp, writer, enclosingDeclaration, flags, symbolStack) {
+                appendSymbolNameOnly(tp.symbol, writer);
+                var constraint = getConstraintOfTypeParameter(tp);
+                if (constraint) {
+                    writeSpace(writer);
+                    writeKeyword(writer, 83 /* ExtendsKeyword */);
+                    writeSpace(writer);
+                    buildTypeDisplay(constraint, writer, enclosingDeclaration, flags, symbolStack);
+                }
+            }
+            function buildParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack) {
+                var parameterNode = p.valueDeclaration;
+                if (ts.isRestParameter(parameterNode)) {
+                    writePunctuation(writer, 22 /* DotDotDotToken */);
+                }
+                if (ts.isBindingPattern(parameterNode.name)) {
+                    buildBindingPatternDisplay(parameterNode.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    appendSymbolNameOnly(p, writer);
+                }
+                if (isOptionalParameter(parameterNode)) {
+                    writePunctuation(writer, 53 /* QuestionToken */);
+                }
+                writePunctuation(writer, 54 /* ColonToken */);
+                writeSpace(writer);
+                buildTypeDisplay(getTypeOfSymbol(p), writer, enclosingDeclaration, flags, symbolStack);
+            }
+            function buildBindingPatternDisplay(bindingPattern, writer, enclosingDeclaration, flags, symbolStack) {
+                // We have to explicitly emit square bracket and bracket because these tokens are not stored inside the node.
+                if (bindingPattern.kind === 167 /* ObjectBindingPattern */) {
+                    writePunctuation(writer, 15 /* OpenBraceToken */);
+                    buildDisplayForCommaSeparatedList(bindingPattern.elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 16 /* CloseBraceToken */);
+                }
+                else if (bindingPattern.kind === 168 /* ArrayBindingPattern */) {
+                    writePunctuation(writer, 19 /* OpenBracketToken */);
+                    var elements = bindingPattern.elements;
+                    buildDisplayForCommaSeparatedList(elements, writer, function (e) { return buildBindingElementDisplay(e, writer, enclosingDeclaration, flags, symbolStack); });
+                    if (elements && elements.hasTrailingComma) {
+                        writePunctuation(writer, 24 /* CommaToken */);
+                    }
+                    writePunctuation(writer, 20 /* CloseBracketToken */);
+                }
+            }
+            function buildBindingElementDisplay(bindingElement, writer, enclosingDeclaration, flags, symbolStack) {
+                if (bindingElement.kind === 193 /* OmittedExpression */) {
+                    return;
+                }
+                ts.Debug.assert(bindingElement.kind === 169 /* BindingElement */);
+                if (bindingElement.propertyName) {
+                    writer.writeSymbol(ts.getTextOfNode(bindingElement.propertyName), bindingElement.symbol);
+                    writePunctuation(writer, 54 /* ColonToken */);
+                    writeSpace(writer);
+                }
+                if (ts.isBindingPattern(bindingElement.name)) {
+                    buildBindingPatternDisplay(bindingElement.name, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    if (bindingElement.dotDotDotToken) {
+                        writePunctuation(writer, 22 /* DotDotDotToken */);
+                    }
+                    appendSymbolNameOnly(bindingElement.symbol, writer);
+                }
+            }
+            function buildDisplayForTypeParametersAndDelimiters(typeParameters, writer, enclosingDeclaration, flags, symbolStack) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 25 /* LessThanToken */);
+                    buildDisplayForCommaSeparatedList(typeParameters, writer, function (p) { return buildTypeParameterDisplay(p, writer, enclosingDeclaration, flags, symbolStack); });
+                    writePunctuation(writer, 27 /* GreaterThanToken */);
+                }
+            }
+            function buildDisplayForCommaSeparatedList(list, writer, action) {
+                for (var i = 0; i < list.length; i++) {
+                    if (i > 0) {
+                        writePunctuation(writer, 24 /* CommaToken */);
+                        writeSpace(writer);
+                    }
+                    action(list[i]);
+                }
+            }
+            function buildDisplayForTypeArgumentsAndDelimiters(typeParameters, mapper, writer, enclosingDeclaration, flags, symbolStack) {
+                if (typeParameters && typeParameters.length) {
+                    writePunctuation(writer, 25 /* LessThanToken */);
+                    var flags_1 = 256 /* InFirstTypeArgument */;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (i > 0) {
+                            writePunctuation(writer, 24 /* CommaToken */);
+                            writeSpace(writer);
+                            flags_1 = 0 /* None */;
+                        }
+                        buildTypeDisplay(mapper(typeParameters[i]), writer, enclosingDeclaration, flags_1);
+                    }
+                    writePunctuation(writer, 27 /* GreaterThanToken */);
+                }
+            }
+            function buildDisplayForParametersAndDelimiters(thisType, parameters, writer, enclosingDeclaration, flags, symbolStack) {
+                writePunctuation(writer, 17 /* OpenParenToken */);
+                if (thisType) {
+                    writeKeyword(writer, 97 /* ThisKeyword */);
+                    writePunctuation(writer, 54 /* ColonToken */);
+                    writeSpace(writer);
+                    buildTypeDisplay(thisType, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                for (var i = 0; i < parameters.length; i++) {
+                    if (i > 0 || thisType) {
+                        writePunctuation(writer, 24 /* CommaToken */);
+                        writeSpace(writer);
+                    }
+                    buildParameterDisplay(parameters[i], writer, enclosingDeclaration, flags, symbolStack);
+                }
+                writePunctuation(writer, 18 /* CloseParenToken */);
+            }
+            function buildTypePredicateDisplay(predicate, writer, enclosingDeclaration, flags, symbolStack) {
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    writer.writeParameter(predicate.parameterName);
+                }
+                else {
+                    writeKeyword(writer, 97 /* ThisKeyword */);
+                }
+                writeSpace(writer);
+                writeKeyword(writer, 124 /* IsKeyword */);
+                writeSpace(writer);
+                buildTypeDisplay(predicate.type, writer, enclosingDeclaration, flags, symbolStack);
+            }
+            function buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack) {
+                if (flags & 8 /* WriteArrowStyleSignature */) {
+                    writeSpace(writer);
+                    writePunctuation(writer, 34 /* EqualsGreaterThanToken */);
+                }
+                else {
+                    writePunctuation(writer, 54 /* ColonToken */);
+                }
+                writeSpace(writer);
+                if (signature.typePredicate) {
+                    buildTypePredicateDisplay(signature.typePredicate, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                else {
+                    var returnType = getReturnTypeOfSignature(signature);
+                    buildTypeDisplay(returnType, writer, enclosingDeclaration, flags, symbolStack);
+                }
+            }
+            function buildSignatureDisplay(signature, writer, enclosingDeclaration, flags, kind, symbolStack) {
+                if (kind === 1 /* Construct */) {
+                    writeKeyword(writer, 92 /* NewKeyword */);
+                    writeSpace(writer);
+                }
+                if (signature.target && (flags & 32 /* WriteTypeArgumentsOfSignature */)) {
+                    // Instantiated signature, write type arguments instead
+                    // This is achieved by passing in the mapper separately
+                    buildDisplayForTypeArgumentsAndDelimiters(signature.target.typeParameters, signature.mapper, writer, enclosingDeclaration);
+                }
+                else {
+                    buildDisplayForTypeParametersAndDelimiters(signature.typeParameters, writer, enclosingDeclaration, flags, symbolStack);
+                }
+                buildDisplayForParametersAndDelimiters(signature.thisType, signature.parameters, writer, enclosingDeclaration, flags, symbolStack);
+                buildReturnTypeDisplay(signature, writer, enclosingDeclaration, flags, symbolStack);
+            }
+            return _displayBuilder || (_displayBuilder = {
+                buildSymbolDisplay: buildSymbolDisplay,
+                buildTypeDisplay: buildTypeDisplay,
+                buildTypeParameterDisplay: buildTypeParameterDisplay,
+                buildTypePredicateDisplay: buildTypePredicateDisplay,
+                buildParameterDisplay: buildParameterDisplay,
+                buildDisplayForParametersAndDelimiters: buildDisplayForParametersAndDelimiters,
+                buildDisplayForTypeParametersAndDelimiters: buildDisplayForTypeParametersAndDelimiters,
+                buildTypeParameterDisplayFromSymbol: buildTypeParameterDisplayFromSymbol,
+                buildSignatureDisplay: buildSignatureDisplay,
+                buildReturnTypeDisplay: buildReturnTypeDisplay
+            });
+        }
+        function isDeclarationVisible(node) {
+            if (node) {
+                var links = getNodeLinks(node);
+                if (links.isVisible === undefined) {
+                    links.isVisible = !!determineIfDeclarationIsVisible();
+                }
+                return links.isVisible;
+            }
+            return false;
+            function determineIfDeclarationIsVisible() {
+                switch (node.kind) {
+                    case 169 /* BindingElement */:
+                        return isDeclarationVisible(node.parent.parent);
+                    case 218 /* VariableDeclaration */:
+                        if (ts.isBindingPattern(node.name) &&
+                            !node.name.elements.length) {
+                            // If the binding pattern is empty, this variable declaration is not visible
+                            return false;
+                        }
+                    // Otherwise fall through
+                    case 225 /* ModuleDeclaration */:
+                    case 221 /* ClassDeclaration */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 223 /* TypeAliasDeclaration */:
+                    case 220 /* FunctionDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 229 /* ImportEqualsDeclaration */:
+                        // external module augmentation is always visible
+                        if (ts.isExternalModuleAugmentation(node)) {
+                            return true;
+                        }
+                        var parent_8 = getDeclarationContainer(node);
+                        // If the node is not exported or it is not ambient module element (except import declaration)
+                        if (!(ts.getCombinedNodeFlags(node) & 1 /* Export */) &&
+                            !(node.kind !== 229 /* ImportEqualsDeclaration */ && parent_8.kind !== 256 /* SourceFile */ && ts.isInAmbientContext(parent_8))) {
+                            return isGlobalSourceFile(parent_8);
+                        }
+                        // Exported members/ambient module elements (exception import declaration) are visible if parent is visible
+                        return isDeclarationVisible(parent_8);
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        if (node.flags & (8 /* Private */ | 16 /* Protected */)) {
+                            // Private/protected properties/methods are not visible
+                            return false;
+                        }
+                    // Public properties/methods are visible if its parents are visible, so const it fall into next case statement
+                    case 148 /* Constructor */:
+                    case 152 /* ConstructSignature */:
+                    case 151 /* CallSignature */:
+                    case 153 /* IndexSignature */:
+                    case 142 /* Parameter */:
+                    case 226 /* ModuleBlock */:
+                    case 156 /* FunctionType */:
+                    case 157 /* ConstructorType */:
+                    case 159 /* TypeLiteral */:
+                    case 155 /* TypeReference */:
+                    case 160 /* ArrayType */:
+                    case 161 /* TupleType */:
+                    case 162 /* UnionType */:
+                    case 163 /* IntersectionType */:
+                    case 164 /* ParenthesizedType */:
+                        return isDeclarationVisible(node.parent);
+                    // Default binding, import specifier and namespace import is visible
+                    // only on demand so by default it is not visible
+                    case 231 /* ImportClause */:
+                    case 232 /* NamespaceImport */:
+                    case 234 /* ImportSpecifier */:
+                        return false;
+                    // Type parameters are always visible
+                    case 141 /* TypeParameter */:
+                    // Source file is always visible
+                    case 256 /* SourceFile */:
+                        return true;
+                    // Export assignments do not create name bindings outside the module
+                    case 235 /* ExportAssignment */:
+                        return false;
+                    default:
+                        return false;
+                }
+            }
+        }
+        function collectLinkedAliases(node) {
+            var exportSymbol;
+            if (node.parent && node.parent.kind === 235 /* ExportAssignment */) {
+                exportSymbol = resolveName(node.parent, node.text, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */, ts.Diagnostics.Cannot_find_name_0, node);
+            }
+            else if (node.parent.kind === 238 /* ExportSpecifier */) {
+                var exportSpecifier = node.parent;
+                exportSymbol = exportSpecifier.parent.parent.moduleSpecifier ?
+                    getExternalModuleMember(exportSpecifier.parent.parent, exportSpecifier) :
+                    resolveEntityName(exportSpecifier.propertyName || exportSpecifier.name, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */);
+            }
+            var result = [];
+            if (exportSymbol) {
+                buildVisibleNodeList(exportSymbol.declarations);
+            }
+            return result;
+            function buildVisibleNodeList(declarations) {
+                ts.forEach(declarations, function (declaration) {
+                    getNodeLinks(declaration).isVisible = true;
+                    var resultNode = getAnyImportSyntax(declaration) || declaration;
+                    if (!ts.contains(result, resultNode)) {
+                        result.push(resultNode);
+                    }
+                    if (ts.isInternalModuleImportEqualsDeclaration(declaration)) {
+                        // Add the referenced top container visible
+                        var internalModuleReference = declaration.moduleReference;
+                        var firstIdentifier = getFirstIdentifier(internalModuleReference);
+                        var importSymbol = resolveName(declaration, firstIdentifier.text, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */, undefined, undefined);
+                        if (importSymbol) {
+                            buildVisibleNodeList(importSymbol.declarations);
+                        }
+                    }
+                });
+            }
+        }
+        /**
+         * Push an entry on the type resolution stack. If an entry with the given target and the given property name
+         * is already on the stack, and no entries in between already have a type, then a circularity has occurred.
+         * In this case, the result values of the existing entry and all entries pushed after it are changed to false,
+         * and the value false is returned. Otherwise, the new entry is just pushed onto the stack, and true is returned.
+         * In order to see if the same query has already been done before, the target object and the propertyName both
+         * must match the one passed in.
+         *
+         * @param target The symbol, type, or signature whose type is being queried
+         * @param propertyName The property name that should be used to query the target for its type
+         */
+        function pushTypeResolution(target, propertyName) {
+            var resolutionCycleStartIndex = findResolutionCycleStartIndex(target, propertyName);
+            if (resolutionCycleStartIndex >= 0) {
+                // A cycle was found
+                var length_2 = resolutionTargets.length;
+                for (var i = resolutionCycleStartIndex; i < length_2; i++) {
+                    resolutionResults[i] = false;
+                }
+                return false;
+            }
+            resolutionTargets.push(target);
+            resolutionResults.push(/*items*/ true);
+            resolutionPropertyNames.push(propertyName);
+            return true;
+        }
+        function findResolutionCycleStartIndex(target, propertyName) {
+            for (var i = resolutionTargets.length - 1; i >= 0; i--) {
+                if (hasType(resolutionTargets[i], resolutionPropertyNames[i])) {
+                    return -1;
+                }
+                if (resolutionTargets[i] === target && resolutionPropertyNames[i] === propertyName) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+        function hasType(target, propertyName) {
+            if (propertyName === 0 /* Type */) {
+                return getSymbolLinks(target).type;
+            }
+            if (propertyName === 2 /* DeclaredType */) {
+                return getSymbolLinks(target).declaredType;
+            }
+            if (propertyName === 1 /* ResolvedBaseConstructorType */) {
+                ts.Debug.assert(!!(target.flags & 1024 /* Class */));
+                return target.resolvedBaseConstructorType;
+            }
+            if (propertyName === 3 /* ResolvedReturnType */) {
+                return target.resolvedReturnType;
+            }
+            ts.Debug.fail("Unhandled TypeSystemPropertyName " + propertyName);
+        }
+        // Pop an entry from the type resolution stack and return its associated result value. The result value will
+        // be true if no circularities were detected, or false if a circularity was found.
+        function popTypeResolution() {
+            resolutionTargets.pop();
+            resolutionPropertyNames.pop();
+            return resolutionResults.pop();
+        }
+        function getDeclarationContainer(node) {
+            node = ts.getRootDeclaration(node);
+            while (node) {
+                switch (node.kind) {
+                    case 218 /* VariableDeclaration */:
+                    case 219 /* VariableDeclarationList */:
+                    case 234 /* ImportSpecifier */:
+                    case 233 /* NamedImports */:
+                    case 232 /* NamespaceImport */:
+                    case 231 /* ImportClause */:
+                        node = node.parent;
+                        break;
+                    default:
+                        return node.parent;
+                }
+            }
+        }
+        function getTypeOfPrototypeProperty(prototype) {
+            // TypeScript 1.0 spec (April 2014): 8.4
+            // Every class automatically contains a static property member named 'prototype',
+            // the type of which is an instantiation of the class type with type Any supplied as a type argument for each type parameter.
+            // It is an error to explicitly declare a static property member with the name 'prototype'.
+            var classType = getDeclaredTypeOfSymbol(getParentOfSymbol(prototype));
+            return classType.typeParameters ? createTypeReference(classType, ts.map(classType.typeParameters, function (_) { return anyType; })) : classType;
+        }
+        // Return the type of the given property in the given type, or undefined if no such property exists
+        function getTypeOfPropertyOfType(type, name) {
+            var prop = getPropertyOfType(type, name);
+            return prop ? getTypeOfSymbol(prop) : undefined;
+        }
+        function isTypeAny(type) {
+            return type && (type.flags & 1 /* Any */) !== 0;
+        }
+        // Return the type of a binding element parent. We check SymbolLinks first to see if a type has been
+        // assigned by contextual typing.
+        function getTypeForBindingElementParent(node) {
+            var symbol = getSymbolOfNode(node);
+            return symbol && getSymbolLinks(symbol).type || getTypeForVariableLikeDeclaration(node, /*includeOptionality*/ false);
+        }
+        function getTextOfPropertyName(name) {
+            switch (name.kind) {
+                case 69 /* Identifier */:
+                    return name.text;
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                    return name.text;
+                case 140 /* ComputedPropertyName */:
+                    if (ts.isStringOrNumericLiteral(name.expression.kind)) {
+                        return name.expression.text;
+                    }
+            }
+            return undefined;
+        }
+        function isComputedNonLiteralName(name) {
+            return name.kind === 140 /* ComputedPropertyName */ && !ts.isStringOrNumericLiteral(name.expression.kind);
+        }
+        /** Return the inferred type for a binding element */
+        function getTypeForBindingElement(declaration) {
+            var pattern = declaration.parent;
+            var parentType = getTypeForBindingElementParent(pattern.parent);
+            // If parent has the unknown (error) type, then so does this binding element
+            if (parentType === unknownType) {
+                return unknownType;
+            }
+            // If no type was specified or inferred for parent, or if the specified or inferred type is any,
+            // infer from the initializer of the binding element if one is present. Otherwise, go with the
+            // undefined or any type of the parent.
+            if (!parentType || isTypeAny(parentType)) {
+                if (declaration.initializer) {
+                    return checkExpressionCached(declaration.initializer);
+                }
+                return parentType;
+            }
+            var type;
+            if (pattern.kind === 167 /* ObjectBindingPattern */) {
+                // Use explicitly specified property name ({ p: xxx } form), or otherwise the implied name ({ p } form)
+                var name_11 = declaration.propertyName || declaration.name;
+                if (isComputedNonLiteralName(name_11)) {
+                    // computed properties with non-literal names are treated as 'any'
+                    return anyType;
+                }
+                if (declaration.initializer) {
+                    getContextualType(declaration.initializer);
+                }
+                // Use type of the specified property, or otherwise, for a numeric name, the type of the numeric index signature,
+                // or otherwise the type of the string index signature.
+                var text = getTextOfPropertyName(name_11);
+                type = getTypeOfPropertyOfType(parentType, text) ||
+                    isNumericLiteralName(text) && getIndexTypeOfType(parentType, 1 /* Number */) ||
+                    getIndexTypeOfType(parentType, 0 /* String */);
+                if (!type) {
+                    error(name_11, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(parentType), ts.declarationNameToString(name_11));
+                    return unknownType;
+                }
+            }
+            else {
+                // This elementType will be used if the specific property corresponding to this index is not
+                // present (aka the tuple element property). This call also checks that the parentType is in
+                // fact an iterable or array (depending on target language).
+                var elementType = checkIteratedTypeOrElementType(parentType, pattern, /*allowStringInput*/ false);
+                if (!declaration.dotDotDotToken) {
+                    // Use specific property type when parent is a tuple or numeric index type when parent is an array
+                    var propName = "" + ts.indexOf(pattern.elements, declaration);
+                    type = isTupleLikeType(parentType)
+                        ? getTypeOfPropertyOfType(parentType, propName)
+                        : elementType;
+                    if (!type) {
+                        if (isTupleType(parentType)) {
+                            error(declaration, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(parentType), parentType.elementTypes.length, pattern.elements.length);
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Type_0_has_no_property_1, typeToString(parentType), propName);
+                        }
+                        return unknownType;
+                    }
+                }
+                else {
+                    // Rest element has an array type with the same element type as the parent type
+                    type = createArrayType(elementType);
+                }
+            }
+            // In strict null checking mode, if a default value of a non-undefined type is specified, remove
+            // undefined from the final type.
+            if (strictNullChecks && declaration.initializer && !(getCombinedTypeFlags(checkExpressionCached(declaration.initializer)) & 32 /* Undefined */)) {
+                type = getTypeWithFacts(type, 131072 /* NEUndefined */);
+            }
+            return type;
+        }
+        function getTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
+            var jsDocType = getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration);
+            if (jsDocType) {
+                return getTypeFromTypeNode(jsDocType);
+            }
+        }
+        function getJSDocTypeForVariableLikeDeclarationFromJSDocComment(declaration) {
+            // First, see if this node has an @type annotation on it directly.
+            var typeTag = ts.getJSDocTypeTag(declaration);
+            if (typeTag && typeTag.typeExpression) {
+                return typeTag.typeExpression.type;
+            }
+            if (declaration.kind === 218 /* VariableDeclaration */ &&
+                declaration.parent.kind === 219 /* VariableDeclarationList */ &&
+                declaration.parent.parent.kind === 200 /* VariableStatement */) {
+                // @type annotation might have been on the variable statement, try that instead.
+                var annotation = ts.getJSDocTypeTag(declaration.parent.parent);
+                if (annotation && annotation.typeExpression) {
+                    return annotation.typeExpression.type;
+                }
+            }
+            else if (declaration.kind === 142 /* Parameter */) {
+                // If it's a parameter, see if the parent has a jsdoc comment with an @param
+                // annotation.
+                var paramTag = ts.getCorrespondingJSDocParameterTag(declaration);
+                if (paramTag && paramTag.typeExpression) {
+                    return paramTag.typeExpression.type;
+                }
+            }
+            return undefined;
+        }
+        function addOptionality(type, optional) {
+            return strictNullChecks && optional ? addTypeKind(type, 32 /* Undefined */) : type;
+        }
+        // Return the inferred type for a variable, parameter, or property declaration
+        function getTypeForVariableLikeDeclaration(declaration, includeOptionality) {
+            if (declaration.flags & 134217728 /* JavaScriptFile */) {
+                // If this is a variable in a JavaScript file, then use the JSDoc type (if it has
+                // one as its type), otherwise fallback to the below standard TS codepaths to
+                // try to figure it out.
+                var type = getTypeForVariableLikeDeclarationFromJSDocComment(declaration);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            // A variable declared in a for..in statement is always of type string
+            if (declaration.parent.parent.kind === 207 /* ForInStatement */) {
+                return stringType;
+            }
+            if (declaration.parent.parent.kind === 208 /* ForOfStatement */) {
+                // checkRightHandSideOfForOf will return undefined if the for-of expression type was
+                // missing properties/signatures required to get its iteratedType (like
+                // [Symbol.iterator] or next). This may be because we accessed properties from anyType,
+                // or it may have led to an error inside getElementTypeOfIterable.
+                return checkRightHandSideOfForOf(declaration.parent.parent.expression) || anyType;
+            }
+            if (ts.isBindingPattern(declaration.parent)) {
+                return getTypeForBindingElement(declaration);
+            }
+            // Use type from type annotation if one is present
+            if (declaration.type) {
+                return addOptionality(getTypeFromTypeNode(declaration.type), /*optional*/ declaration.questionToken && includeOptionality);
+            }
+            if (declaration.kind === 142 /* Parameter */) {
+                var func = declaration.parent;
+                // For a parameter of a set accessor, use the type of the get accessor if one is present
+                if (func.kind === 150 /* SetAccessor */ && !ts.hasDynamicName(func)) {
+                    var getter = ts.getDeclarationOfKind(declaration.parent.symbol, 149 /* GetAccessor */);
+                    if (getter) {
+                        var signature = getSignatureFromDeclaration(getter);
+                        var thisParameter = getAccessorThisParameter(func);
+                        if (thisParameter && declaration === thisParameter) {
+                            return signature.thisType;
+                        }
+                        return getReturnTypeOfSignature(signature);
+                    }
+                }
+                // Use contextual parameter type if one is available
+                var type = declaration.symbol.name === "this"
+                    ? getContextuallyTypedThisType(func)
+                    : getContextuallyTypedParameterType(declaration);
+                if (type) {
+                    return addOptionality(type, /*optional*/ declaration.questionToken && includeOptionality);
+                }
+            }
+            // Use the type of the initializer expression if one is present
+            if (declaration.initializer) {
+                return addOptionality(checkExpressionCached(declaration.initializer), /*optional*/ declaration.questionToken && includeOptionality);
+            }
+            // If it is a short-hand property assignment, use the type of the identifier
+            if (declaration.kind === 254 /* ShorthandPropertyAssignment */) {
+                return checkIdentifier(declaration.name);
+            }
+            // If the declaration specifies a binding pattern, use the type implied by the binding pattern
+            if (ts.isBindingPattern(declaration.name)) {
+                return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ false);
+            }
+            // No type specified and nothing can be inferred
+            return undefined;
+        }
+        // Return the type implied by a binding pattern element. This is the type of the initializer of the element if
+        // one is present. Otherwise, if the element is itself a binding pattern, it is the type implied by the binding
+        // pattern. Otherwise, it is the type any.
+        function getTypeFromBindingElement(element, includePatternInType) {
+            if (element.initializer) {
+                var type = checkExpressionCached(element.initializer);
+                reportErrorsFromWidening(element, type);
+                return getWidenedType(type);
+            }
+            if (ts.isBindingPattern(element.name)) {
+                return getTypeFromBindingPattern(element.name, includePatternInType);
+            }
+            if (compilerOptions.noImplicitAny && !declarationBelongsToPrivateAmbientMember(element)) {
+                reportImplicitAnyError(element, anyType);
+            }
+            return anyType;
+        }
+        // Return the type implied by an object binding pattern
+        function getTypeFromObjectBindingPattern(pattern, includePatternInType) {
+            var members = {};
+            var hasComputedProperties = false;
+            ts.forEach(pattern.elements, function (e) {
+                var name = e.propertyName || e.name;
+                if (isComputedNonLiteralName(name)) {
+                    // do not include computed properties in the implied type
+                    hasComputedProperties = true;
+                    return;
+                }
+                var text = getTextOfPropertyName(name);
+                var flags = 4 /* Property */ | 67108864 /* Transient */ | (e.initializer ? 536870912 /* Optional */ : 0);
+                var symbol = createSymbol(flags, text);
+                symbol.type = getTypeFromBindingElement(e, includePatternInType);
+                symbol.bindingElement = e;
+                members[symbol.name] = symbol;
+            });
+            var result = createAnonymousType(undefined, members, emptyArray, emptyArray, undefined, undefined);
+            if (includePatternInType) {
+                result.pattern = pattern;
+            }
+            if (hasComputedProperties) {
+                result.flags |= 67108864 /* ObjectLiteralPatternWithComputedProperties */;
+            }
+            return result;
+        }
+        // Return the type implied by an array binding pattern
+        function getTypeFromArrayBindingPattern(pattern, includePatternInType) {
+            var elements = pattern.elements;
+            if (elements.length === 0 || elements[elements.length - 1].dotDotDotToken) {
+                return languageVersion >= 2 /* ES6 */ ? createIterableType(anyType) : anyArrayType;
+            }
+            // If the pattern has at least one element, and no rest element, then it should imply a tuple type.
+            var elementTypes = ts.map(elements, function (e) { return e.kind === 193 /* OmittedExpression */ ? anyType : getTypeFromBindingElement(e, includePatternInType); });
+            if (includePatternInType) {
+                var result = createNewTupleType(elementTypes);
+                result.pattern = pattern;
+                return result;
+            }
+            return createTupleType(elementTypes);
+        }
+        // Return the type implied by a binding pattern. This is the type implied purely by the binding pattern itself
+        // and without regard to its context (i.e. without regard any type annotation or initializer associated with the
+        // declaration in which the binding pattern is contained). For example, the implied type of [x, y] is [any, any]
+        // and the implied type of { x, y: z = 1 } is { x: any; y: number; }. The type implied by a binding pattern is
+        // used as the contextual type of an initializer associated with the binding pattern. Also, for a destructuring
+        // parameter with no type annotation or initializer, the type implied by the binding pattern becomes the type of
+        // the parameter.
+        function getTypeFromBindingPattern(pattern, includePatternInType) {
+            return pattern.kind === 167 /* ObjectBindingPattern */
+                ? getTypeFromObjectBindingPattern(pattern, includePatternInType)
+                : getTypeFromArrayBindingPattern(pattern, includePatternInType);
+        }
+        // Return the type associated with a variable, parameter, or property declaration. In the simple case this is the type
+        // specified in a type annotation or inferred from an initializer. However, in the case of a destructuring declaration it
+        // is a bit more involved. For example:
+        //
+        //   var [x, s = ""] = [1, "one"];
+        //
+        // Here, the array literal [1, "one"] is contextually typed by the type [any, string], which is the implied type of the
+        // binding pattern [x, s = ""]. Because the contextual type is a tuple type, the resulting type of [1, "one"] is the
+        // tuple type [number, string]. Thus, the type inferred for 'x' is number and the type inferred for 's' is string.
+        function getWidenedTypeForVariableLikeDeclaration(declaration, reportErrors) {
+            var type = getTypeForVariableLikeDeclaration(declaration, /*includeOptionality*/ true);
+            if (type) {
+                if (reportErrors) {
+                    reportErrorsFromWidening(declaration, type);
+                }
+                // During a normal type check we'll never get to here with a property assignment (the check of the containing
+                // object literal uses a different path). We exclude widening only so that language services and type verification
+                // tools see the actual type.
+                if (declaration.kind === 253 /* PropertyAssignment */) {
+                    return type;
+                }
+                return getWidenedType(type);
+            }
+            // Rest parameters default to type any[], other parameters default to type any
+            type = declaration.dotDotDotToken ? anyArrayType : anyType;
+            // Report implicit any errors unless this is a private property within an ambient declaration
+            if (reportErrors && compilerOptions.noImplicitAny) {
+                if (!declarationBelongsToPrivateAmbientMember(declaration)) {
+                    reportImplicitAnyError(declaration, type);
+                }
+            }
+            return type;
+        }
+        function declarationBelongsToPrivateAmbientMember(declaration) {
+            var root = ts.getRootDeclaration(declaration);
+            var memberDeclaration = root.kind === 142 /* Parameter */ ? root.parent : root;
+            return isPrivateWithinAmbient(memberDeclaration);
+        }
+        function getTypeOfVariableOrParameterOrProperty(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                // Handle prototype property
+                if (symbol.flags & 134217728 /* Prototype */) {
+                    return links.type = getTypeOfPrototypeProperty(symbol);
+                }
+                // Handle catch clause variables
+                var declaration = symbol.valueDeclaration;
+                if (declaration.parent.kind === 252 /* CatchClause */) {
+                    return links.type = anyType;
+                }
+                // Handle export default expressions
+                if (declaration.kind === 235 /* ExportAssignment */) {
+                    return links.type = checkExpression(declaration.expression);
+                }
+                // Handle module.exports = expr
+                if (declaration.kind === 187 /* BinaryExpression */) {
+                    return links.type = getUnionType(ts.map(symbol.declarations, function (decl) { return checkExpressionCached(decl.right); }));
+                }
+                if (declaration.kind === 172 /* PropertyAccessExpression */) {
+                    // Declarations only exist for property access expressions for certain
+                    // special assignment kinds
+                    if (declaration.parent.kind === 187 /* BinaryExpression */) {
+                        // Handle exports.p = expr or this.p = expr or className.prototype.method = expr
+                        return links.type = checkExpressionCached(declaration.parent.right);
+                    }
+                }
+                // Handle variable, parameter or property
+                if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                    return unknownType;
+                }
+                var type = getWidenedTypeForVariableLikeDeclaration(declaration, /*reportErrors*/ true);
+                if (!popTypeResolution()) {
+                    if (symbol.valueDeclaration.type) {
+                        // Variable has type annotation that circularly references the variable itself
+                        type = unknownType;
+                        error(symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_type_annotation, symbolToString(symbol));
+                    }
+                    else {
+                        // Variable has initializer that circularly references the variable itself
+                        type = anyType;
+                        if (compilerOptions.noImplicitAny) {
+                            error(symbol.valueDeclaration, ts.Diagnostics._0_implicitly_has_type_any_because_it_does_not_have_a_type_annotation_and_is_referenced_directly_or_indirectly_in_its_own_initializer, symbolToString(symbol));
+                        }
+                    }
+                }
+                links.type = type;
+            }
+            return links.type;
+        }
+        function getAnnotatedAccessorType(accessor) {
+            if (accessor) {
+                if (accessor.kind === 149 /* GetAccessor */) {
+                    return accessor.type && getTypeFromTypeNode(accessor.type);
+                }
+                else {
+                    var setterTypeAnnotation = ts.getSetAccessorTypeAnnotationNode(accessor);
+                    return setterTypeAnnotation && getTypeFromTypeNode(setterTypeAnnotation);
+                }
+            }
+            return undefined;
+        }
+        function getAnnotatedAccessorThisType(accessor) {
+            if (accessor) {
+                var parameter = getAccessorThisParameter(accessor);
+                if (parameter && parameter.type) {
+                    return getTypeFromTypeNode(accessor.parameters[0].type);
+                }
+            }
+            return undefined;
+        }
+        function getTypeOfAccessors(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var getter = ts.getDeclarationOfKind(symbol, 149 /* GetAccessor */);
+                var setter = ts.getDeclarationOfKind(symbol, 150 /* SetAccessor */);
+                if (getter && getter.flags & 134217728 /* JavaScriptFile */) {
+                    var jsDocType = getTypeForVariableLikeDeclarationFromJSDocComment(getter);
+                    if (jsDocType) {
+                        return links.type = jsDocType;
+                    }
+                }
+                if (!pushTypeResolution(symbol, 0 /* Type */)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                // First try to see if the user specified a return type on the get-accessor.
+                var getterReturnType = getAnnotatedAccessorType(getter);
+                if (getterReturnType) {
+                    type = getterReturnType;
+                }
+                else {
+                    // If the user didn't specify a return type, try to use the set-accessor's parameter type.
+                    var setterParameterType = getAnnotatedAccessorType(setter);
+                    if (setterParameterType) {
+                        type = setterParameterType;
+                    }
+                    else {
+                        // If there are no specified types, try to infer it from the body of the get accessor if it exists.
+                        if (getter && getter.body) {
+                            type = getReturnTypeFromBody(getter);
+                        }
+                        else {
+                            if (compilerOptions.noImplicitAny) {
+                                error(setter, ts.Diagnostics.Property_0_implicitly_has_type_any_because_its_set_accessor_lacks_a_type_annotation, symbolToString(symbol));
+                            }
+                            type = anyType;
+                        }
+                    }
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (compilerOptions.noImplicitAny) {
+                        var getter_1 = ts.getDeclarationOfKind(symbol, 149 /* GetAccessor */);
+                        error(getter_1, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, symbolToString(symbol));
+                    }
+                }
+                links.type = type;
+            }
+            return links.type;
+        }
+        function getTypeOfFuncClassEnumModule(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var type = createObjectType(65536 /* Anonymous */, symbol);
+                links.type = strictNullChecks && symbol.flags & 536870912 /* Optional */ ?
+                    addTypeKind(type, 32 /* Undefined */) : type;
+            }
+            return links.type;
+        }
+        function getTypeOfEnumMember(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                links.type = getDeclaredTypeOfEnum(getParentOfSymbol(symbol));
+            }
+            return links.type;
+        }
+        function getTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                var targetSymbol = resolveAlias(symbol);
+                // It only makes sense to get the type of a value symbol. If the result of resolving
+                // the alias is not a value, then it has no type. To get the type associated with a
+                // type symbol, call getDeclaredTypeOfSymbol.
+                // This check is important because without it, a call to getTypeOfSymbol could end
+                // up recursively calling getTypeOfAlias, causing a stack overflow.
+                links.type = targetSymbol.flags & 107455 /* Value */
+                    ? getTypeOfSymbol(targetSymbol)
+                    : unknownType;
+            }
+            return links.type;
+        }
+        function getTypeOfInstantiatedSymbol(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.type) {
+                links.type = instantiateType(getTypeOfSymbol(links.target), links.mapper);
+            }
+            return links.type;
+        }
+        function getTypeOfSymbol(symbol) {
+            if (symbol.flags & 16777216 /* Instantiated */) {
+                return getTypeOfInstantiatedSymbol(symbol);
+            }
+            if (symbol.flags & (3 /* Variable */ | 4 /* Property */)) {
+                return getTypeOfVariableOrParameterOrProperty(symbol);
+            }
+            if (symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 384 /* Enum */ | 512 /* ValueModule */)) {
+                return getTypeOfFuncClassEnumModule(symbol);
+            }
+            if (symbol.flags & 8 /* EnumMember */) {
+                return getTypeOfEnumMember(symbol);
+            }
+            if (symbol.flags & 98304 /* Accessor */) {
+                return getTypeOfAccessors(symbol);
+            }
+            if (symbol.flags & 8388608 /* Alias */) {
+                return getTypeOfAlias(symbol);
+            }
+            return unknownType;
+        }
+        function getTargetType(type) {
+            return type.flags & 4096 /* Reference */ ? type.target : type;
+        }
+        function hasBaseType(type, checkBase) {
+            return check(type);
+            function check(type) {
+                var target = getTargetType(type);
+                return target === checkBase || ts.forEach(getBaseTypes(target), check);
+            }
+        }
+        // Appends the type parameters given by a list of declarations to a set of type parameters and returns the resulting set.
+        // The function allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set
+        // in-place and returns the same array.
+        function appendTypeParameters(typeParameters, declarations) {
+            for (var _i = 0, declarations_2 = declarations; _i < declarations_2.length; _i++) {
+                var declaration = declarations_2[_i];
+                var tp = getDeclaredTypeOfTypeParameter(getSymbolOfNode(declaration));
+                if (!typeParameters) {
+                    typeParameters = [tp];
+                }
+                else if (!ts.contains(typeParameters, tp)) {
+                    typeParameters.push(tp);
+                }
+            }
+            return typeParameters;
+        }
+        // Appends the outer type parameters of a node to a set of type parameters and returns the resulting set. The function
+        // allocates a new array if the input type parameter set is undefined, but otherwise it modifies the set in-place and
+        // returns the same array.
+        function appendOuterTypeParameters(typeParameters, node) {
+            while (true) {
+                node = node.parent;
+                if (!node) {
+                    return typeParameters;
+                }
+                if (node.kind === 221 /* ClassDeclaration */ || node.kind === 192 /* ClassExpression */ ||
+                    node.kind === 220 /* FunctionDeclaration */ || node.kind === 179 /* FunctionExpression */ ||
+                    node.kind === 147 /* MethodDeclaration */ || node.kind === 180 /* ArrowFunction */) {
+                    var declarations = node.typeParameters;
+                    if (declarations) {
+                        return appendTypeParameters(appendOuterTypeParameters(typeParameters, node), declarations);
+                    }
+                }
+            }
+        }
+        // The outer type parameters are those defined by enclosing generic classes, methods, or functions.
+        function getOuterTypeParametersOfClassOrInterface(symbol) {
+            var declaration = symbol.flags & 32 /* Class */ ? symbol.valueDeclaration : ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */);
+            return appendOuterTypeParameters(undefined, declaration);
+        }
+        // The local type parameters are the combined set of type parameters from all declarations of the class,
+        // interface, or type alias.
+        function getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol) {
+            var result;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var node = _a[_i];
+                if (node.kind === 222 /* InterfaceDeclaration */ || node.kind === 221 /* ClassDeclaration */ ||
+                    node.kind === 192 /* ClassExpression */ || node.kind === 223 /* TypeAliasDeclaration */) {
+                    var declaration = node;
+                    if (declaration.typeParameters) {
+                        result = appendTypeParameters(result, declaration.typeParameters);
+                    }
+                }
+            }
+            return result;
+        }
+        // The full set of type parameters for a generic class or interface type consists of its outer type parameters plus
+        // its locally declared type parameters.
+        function getTypeParametersOfClassOrInterface(symbol) {
+            return ts.concatenate(getOuterTypeParametersOfClassOrInterface(symbol), getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol));
+        }
+        function isConstructorType(type) {
+            return type.flags & 80896 /* ObjectType */ && getSignaturesOfType(type, 1 /* Construct */).length > 0;
+        }
+        function getBaseTypeNodeOfClass(type) {
+            return ts.getClassExtendsHeritageClauseElement(type.symbol.valueDeclaration);
+        }
+        function getConstructorsForTypeArguments(type, typeArgumentNodes) {
+            var typeArgCount = typeArgumentNodes ? typeArgumentNodes.length : 0;
+            return ts.filter(getSignaturesOfType(type, 1 /* Construct */), function (sig) { return (sig.typeParameters ? sig.typeParameters.length : 0) === typeArgCount; });
+        }
+        function getInstantiatedConstructorsForTypeArguments(type, typeArgumentNodes) {
+            var signatures = getConstructorsForTypeArguments(type, typeArgumentNodes);
+            if (typeArgumentNodes) {
+                var typeArguments_1 = ts.map(typeArgumentNodes, getTypeFromTypeNode);
+                signatures = ts.map(signatures, function (sig) { return getSignatureInstantiation(sig, typeArguments_1); });
+            }
+            return signatures;
+        }
+        // The base constructor of a class can resolve to
+        // undefinedType if the class has no extends clause,
+        // unknownType if an error occurred during resolution of the extends expression,
+        // nullType if the extends expression is the null value, or
+        // an object type with at least one construct signature.
+        function getBaseConstructorTypeOfClass(type) {
+            if (!type.resolvedBaseConstructorType) {
+                var baseTypeNode = getBaseTypeNodeOfClass(type);
+                if (!baseTypeNode) {
+                    return type.resolvedBaseConstructorType = undefinedType;
+                }
+                if (!pushTypeResolution(type, 1 /* ResolvedBaseConstructorType */)) {
+                    return unknownType;
+                }
+                var baseConstructorType = checkExpression(baseTypeNode.expression);
+                if (baseConstructorType.flags & 80896 /* ObjectType */) {
+                    // Resolving the members of a class requires us to resolve the base class of that class.
+                    // We force resolution here such that we catch circularities now.
+                    resolveStructuredTypeMembers(baseConstructorType);
+                }
+                if (!popTypeResolution()) {
+                    error(type.symbol.valueDeclaration, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_its_own_base_expression, symbolToString(type.symbol));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                if (baseConstructorType !== unknownType && baseConstructorType !== nullWideningType && !isConstructorType(baseConstructorType)) {
+                    error(baseTypeNode.expression, ts.Diagnostics.Type_0_is_not_a_constructor_function_type, typeToString(baseConstructorType));
+                    return type.resolvedBaseConstructorType = unknownType;
+                }
+                type.resolvedBaseConstructorType = baseConstructorType;
+            }
+            return type.resolvedBaseConstructorType;
+        }
+        function getBaseTypes(type) {
+            var isClass = type.symbol.flags & 32 /* Class */;
+            var isInterface = type.symbol.flags & 64 /* Interface */;
+            if (!type.resolvedBaseTypes) {
+                if (!isClass && !isInterface) {
+                    ts.Debug.fail("type must be class or interface");
+                }
+                if (isClass) {
+                    resolveBaseTypesOfClass(type);
+                }
+                if (isInterface) {
+                    resolveBaseTypesOfInterface(type);
+                }
+            }
+            return type.resolvedBaseTypes;
+        }
+        function resolveBaseTypesOfClass(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            var baseConstructorType = getBaseConstructorTypeOfClass(type);
+            if (!(baseConstructorType.flags & 80896 /* ObjectType */)) {
+                return;
+            }
+            var baseTypeNode = getBaseTypeNodeOfClass(type);
+            var baseType;
+            var originalBaseType = baseConstructorType && baseConstructorType.symbol ? getDeclaredTypeOfSymbol(baseConstructorType.symbol) : undefined;
+            if (baseConstructorType.symbol && baseConstructorType.symbol.flags & 32 /* Class */ &&
+                areAllOuterTypeParametersApplied(originalBaseType)) {
+                // When base constructor type is a class with no captured type arguments we know that the constructors all have the same type parameters as the
+                // class and all return the instance type of the class. There is no need for further checks and we can apply the
+                // type arguments in the same manner as a type reference to get the same error reporting experience.
+                baseType = getTypeFromClassOrInterfaceReference(baseTypeNode, baseConstructorType.symbol);
+            }
+            else {
+                // The class derives from a "class-like" constructor function, check that we have at least one construct signature
+                // with a matching number of type parameters and use the return type of the first instantiated signature. Elsewhere
+                // we check that all instantiated signatures return the same type.
+                var constructors = getInstantiatedConstructorsForTypeArguments(baseConstructorType, baseTypeNode.typeArguments);
+                if (!constructors.length) {
+                    error(baseTypeNode.expression, ts.Diagnostics.No_base_constructor_has_the_specified_number_of_type_arguments);
+                    return;
+                }
+                baseType = getReturnTypeOfSignature(constructors[0]);
+            }
+            if (baseType === unknownType) {
+                return;
+            }
+            if (!(getTargetType(baseType).flags & (1024 /* Class */ | 2048 /* Interface */))) {
+                error(baseTypeNode.expression, ts.Diagnostics.Base_constructor_return_type_0_is_not_a_class_or_interface_type, typeToString(baseType));
+                return;
+            }
+            if (type === baseType || hasBaseType(baseType, type)) {
+                error(type.symbol.valueDeclaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
+                return;
+            }
+            if (type.resolvedBaseTypes === emptyArray) {
+                type.resolvedBaseTypes = [baseType];
+            }
+            else {
+                type.resolvedBaseTypes.push(baseType);
+            }
+        }
+        function areAllOuterTypeParametersApplied(type) {
+            // An unapplied type parameter has its symbol still the same as the matching argument symbol.
+            // Since parameters are applied outer-to-inner, only the last outer parameter needs to be checked.
+            var outerTypeParameters = type.outerTypeParameters;
+            if (outerTypeParameters) {
+                var last = outerTypeParameters.length - 1;
+                var typeArguments = type.typeArguments;
+                return outerTypeParameters[last].symbol !== typeArguments[last].symbol;
+            }
+            return true;
+        }
+        function resolveBaseTypesOfInterface(type) {
+            type.resolvedBaseTypes = type.resolvedBaseTypes || emptyArray;
+            for (var _i = 0, _a = type.symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 222 /* InterfaceDeclaration */ && ts.getInterfaceBaseTypeNodes(declaration)) {
+                    for (var _b = 0, _c = ts.getInterfaceBaseTypeNodes(declaration); _b < _c.length; _b++) {
+                        var node = _c[_b];
+                        var baseType = getTypeFromTypeNode(node);
+                        if (baseType !== unknownType) {
+                            if (getTargetType(baseType).flags & (1024 /* Class */ | 2048 /* Interface */)) {
+                                if (type !== baseType && !hasBaseType(baseType, type)) {
+                                    if (type.resolvedBaseTypes === emptyArray) {
+                                        type.resolvedBaseTypes = [baseType];
+                                    }
+                                    else {
+                                        type.resolvedBaseTypes.push(baseType);
+                                    }
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Type_0_recursively_references_itself_as_a_base_type, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */));
+                                }
+                            }
+                            else {
+                                error(node, ts.Diagnostics.An_interface_may_only_extend_a_class_or_another_interface);
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        // Returns true if the interface given by the symbol is free of "this" references. Specifically, the result is
+        // true if the interface itself contains no references to "this" in its body, if all base types are interfaces,
+        // and if none of the base interfaces have a "this" type.
+        function isIndependentInterface(symbol) {
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 222 /* InterfaceDeclaration */) {
+                    if (declaration.flags & 16384 /* ContainsThis */) {
+                        return false;
+                    }
+                    var baseTypeNodes = ts.getInterfaceBaseTypeNodes(declaration);
+                    if (baseTypeNodes) {
+                        for (var _b = 0, baseTypeNodes_1 = baseTypeNodes; _b < baseTypeNodes_1.length; _b++) {
+                            var node = baseTypeNodes_1[_b];
+                            if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                                var baseSymbol = resolveEntityName(node.expression, 793056 /* Type */, /*ignoreErrors*/ true);
+                                if (!baseSymbol || !(baseSymbol.flags & 64 /* Interface */) || getDeclaredTypeOfClassOrInterface(baseSymbol).thisType) {
+                                    return false;
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            return true;
+        }
+        function getDeclaredTypeOfClassOrInterface(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var kind = symbol.flags & 32 /* Class */ ? 1024 /* Class */ : 2048 /* Interface */;
+                var type = links.declaredType = createObjectType(kind, symbol);
+                var outerTypeParameters = getOuterTypeParametersOfClassOrInterface(symbol);
+                var localTypeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                // A class or interface is generic if it has type parameters or a "this" type. We always give classes a "this" type
+                // because it is not feasible to analyze all members to determine if the "this" type escapes the class (in particular,
+                // property types inferred from initializers and method return types inferred from return statements are very hard
+                // to exhaustively analyze). We give interfaces a "this" type if we can't definitely determine that they are free of
+                // "this" references.
+                if (outerTypeParameters || localTypeParameters || kind === 1024 /* Class */ || !isIndependentInterface(symbol)) {
+                    type.flags |= 4096 /* Reference */;
+                    type.typeParameters = ts.concatenate(outerTypeParameters, localTypeParameters);
+                    type.outerTypeParameters = outerTypeParameters;
+                    type.localTypeParameters = localTypeParameters;
+                    type.instantiations = {};
+                    type.instantiations[getTypeListId(type.typeParameters)] = type;
+                    type.target = type;
+                    type.typeArguments = type.typeParameters;
+                    type.thisType = createType(512 /* TypeParameter */ | 33554432 /* ThisType */);
+                    type.thisType.symbol = symbol;
+                    type.thisType.constraint = type;
+                }
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfTypeAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                // Note that we use the links object as the target here because the symbol object is used as the unique
+                // identity for resolution of the 'type' property in SymbolLinks.
+                if (!pushTypeResolution(symbol, 2 /* DeclaredType */)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                var declaration = ts.getDeclarationOfKind(symbol, 279 /* JSDocTypedefTag */);
+                if (declaration) {
+                    if (declaration.jsDocTypeLiteral) {
+                        type = getTypeFromTypeNode(declaration.jsDocTypeLiteral);
+                    }
+                    else {
+                        type = getTypeFromTypeNode(declaration.typeExpression.type);
+                    }
+                }
+                else {
+                    declaration = ts.getDeclarationOfKind(symbol, 223 /* TypeAliasDeclaration */);
+                    type = getTypeFromTypeNode(declaration.type);
+                }
+                if (popTypeResolution()) {
+                    links.typeParameters = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(symbol);
+                    if (links.typeParameters) {
+                        // Initialize the instantiation cache for generic type aliases. The declared type corresponds to
+                        // an instantiation of the type alias with the type parameters supplied as type arguments.
+                        links.instantiations = {};
+                        links.instantiations[getTypeListId(links.typeParameters)] = type;
+                    }
+                }
+                else {
+                    type = unknownType;
+                    error(declaration.name, ts.Diagnostics.Type_alias_0_circularly_references_itself, symbolToString(symbol));
+                }
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfEnum(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var type = createType(128 /* Enum */);
+                type.symbol = symbol;
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfTypeParameter(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                var type = createType(512 /* TypeParameter */);
+                type.symbol = symbol;
+                if (!ts.getDeclarationOfKind(symbol, 141 /* TypeParameter */).constraint) {
+                    type.constraint = noConstraintType;
+                }
+                links.declaredType = type;
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfAlias(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.declaredType) {
+                links.declaredType = getDeclaredTypeOfSymbol(resolveAlias(symbol));
+            }
+            return links.declaredType;
+        }
+        function getDeclaredTypeOfSymbol(symbol) {
+            ts.Debug.assert((symbol.flags & 16777216 /* Instantiated */) === 0);
+            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                return getDeclaredTypeOfClassOrInterface(symbol);
+            }
+            if (symbol.flags & 524288 /* TypeAlias */) {
+                return getDeclaredTypeOfTypeAlias(symbol);
+            }
+            if (symbol.flags & 384 /* Enum */) {
+                return getDeclaredTypeOfEnum(symbol);
+            }
+            if (symbol.flags & 262144 /* TypeParameter */) {
+                return getDeclaredTypeOfTypeParameter(symbol);
+            }
+            if (symbol.flags & 8388608 /* Alias */) {
+                return getDeclaredTypeOfAlias(symbol);
+            }
+            return unknownType;
+        }
+        // A type reference is considered independent if each type argument is considered independent.
+        function isIndependentTypeReference(node) {
+            if (node.typeArguments) {
+                for (var _i = 0, _a = node.typeArguments; _i < _a.length; _i++) {
+                    var typeNode = _a[_i];
+                    if (!isIndependentType(typeNode)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        // A type is considered independent if it the any, string, number, boolean, symbol, or void keyword, a string
+        // literal type, an array with an element type that is considered independent, or a type reference that is
+        // considered independent.
+        function isIndependentType(node) {
+            switch (node.kind) {
+                case 117 /* AnyKeyword */:
+                case 132 /* StringKeyword */:
+                case 130 /* NumberKeyword */:
+                case 120 /* BooleanKeyword */:
+                case 133 /* SymbolKeyword */:
+                case 103 /* VoidKeyword */:
+                case 135 /* UndefinedKeyword */:
+                case 93 /* NullKeyword */:
+                case 127 /* NeverKeyword */:
+                case 166 /* StringLiteralType */:
+                    return true;
+                case 160 /* ArrayType */:
+                    return isIndependentType(node.elementType);
+                case 155 /* TypeReference */:
+                    return isIndependentTypeReference(node);
+            }
+            return false;
+        }
+        // A variable-like declaration is considered independent (free of this references) if it has a type annotation
+        // that specifies an independent type, or if it has no type annotation and no initializer (and thus of type any).
+        function isIndependentVariableLikeDeclaration(node) {
+            return node.type && isIndependentType(node.type) || !node.type && !node.initializer;
+        }
+        // A function-like declaration is considered independent (free of this references) if it has a return type
+        // annotation that is considered independent and if each parameter is considered independent.
+        function isIndependentFunctionLikeDeclaration(node) {
+            if (node.kind !== 148 /* Constructor */ && (!node.type || !isIndependentType(node.type))) {
+                return false;
+            }
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                if (!isIndependentVariableLikeDeclaration(parameter)) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        // Returns true if the class or interface member given by the symbol is free of "this" references. The
+        // function may return false for symbols that are actually free of "this" references because it is not
+        // feasible to perform a complete analysis in all cases. In particular, property members with types
+        // inferred from their initializers and function members with inferred return types are conservatively
+        // assumed not to be free of "this" references.
+        function isIndependentMember(symbol) {
+            if (symbol.declarations && symbol.declarations.length === 1) {
+                var declaration = symbol.declarations[0];
+                if (declaration) {
+                    switch (declaration.kind) {
+                        case 145 /* PropertyDeclaration */:
+                        case 144 /* PropertySignature */:
+                            return isIndependentVariableLikeDeclaration(declaration);
+                        case 147 /* MethodDeclaration */:
+                        case 146 /* MethodSignature */:
+                        case 148 /* Constructor */:
+                            return isIndependentFunctionLikeDeclaration(declaration);
+                    }
+                }
+            }
+            return false;
+        }
+        function createSymbolTable(symbols) {
+            var result = {};
+            for (var _i = 0, symbols_1 = symbols; _i < symbols_1.length; _i++) {
+                var symbol = symbols_1[_i];
+                result[symbol.name] = symbol;
+            }
+            return result;
+        }
+        // The mappingThisOnly flag indicates that the only type parameter being mapped is "this". When the flag is true,
+        // we check symbols to see if we can quickly conclude they are free of "this" references, thus needing no instantiation.
+        function createInstantiatedSymbolTable(symbols, mapper, mappingThisOnly) {
+            var result = {};
+            for (var _i = 0, symbols_2 = symbols; _i < symbols_2.length; _i++) {
+                var symbol = symbols_2[_i];
+                result[symbol.name] = mappingThisOnly && isIndependentMember(symbol) ? symbol : instantiateSymbol(symbol, mapper);
+            }
+            return result;
+        }
+        function addInheritedMembers(symbols, baseSymbols) {
+            for (var _i = 0, baseSymbols_1 = baseSymbols; _i < baseSymbols_1.length; _i++) {
+                var s = baseSymbols_1[_i];
+                if (!ts.hasProperty(symbols, s.name)) {
+                    symbols[s.name] = s;
+                }
+            }
+        }
+        function resolveDeclaredMembers(type) {
+            if (!type.declaredProperties) {
+                var symbol = type.symbol;
+                type.declaredProperties = getNamedMembers(symbol.members);
+                type.declaredCallSignatures = getSignaturesOfSymbol(symbol.members["__call"]);
+                type.declaredConstructSignatures = getSignaturesOfSymbol(symbol.members["__new"]);
+                type.declaredStringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
+                type.declaredNumberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+            }
+            return type;
+        }
+        function getTypeWithThisArgument(type, thisArgument) {
+            if (type.flags & 4096 /* Reference */) {
+                return createTypeReference(type.target, ts.concatenate(type.typeArguments, [thisArgument || type.target.thisType]));
+            }
+            return type;
+        }
+        function resolveObjectTypeMembers(type, source, typeParameters, typeArguments) {
+            var mapper = identityMapper;
+            var members = source.symbol.members;
+            var callSignatures = source.declaredCallSignatures;
+            var constructSignatures = source.declaredConstructSignatures;
+            var stringIndexInfo = source.declaredStringIndexInfo;
+            var numberIndexInfo = source.declaredNumberIndexInfo;
+            if (!ts.rangeEquals(typeParameters, typeArguments, 0, typeParameters.length)) {
+                mapper = createTypeMapper(typeParameters, typeArguments);
+                members = createInstantiatedSymbolTable(source.declaredProperties, mapper, /*mappingThisOnly*/ typeParameters.length === 1);
+                callSignatures = instantiateList(source.declaredCallSignatures, mapper, instantiateSignature);
+                constructSignatures = instantiateList(source.declaredConstructSignatures, mapper, instantiateSignature);
+                stringIndexInfo = instantiateIndexInfo(source.declaredStringIndexInfo, mapper);
+                numberIndexInfo = instantiateIndexInfo(source.declaredNumberIndexInfo, mapper);
+            }
+            var baseTypes = getBaseTypes(source);
+            if (baseTypes.length) {
+                if (members === source.symbol.members) {
+                    members = createSymbolTable(source.declaredProperties);
+                }
+                var thisArgument = ts.lastOrUndefined(typeArguments);
+                for (var _i = 0, baseTypes_1 = baseTypes; _i < baseTypes_1.length; _i++) {
+                    var baseType = baseTypes_1[_i];
+                    var instantiatedBaseType = thisArgument ? getTypeWithThisArgument(instantiateType(baseType, mapper), thisArgument) : baseType;
+                    addInheritedMembers(members, getPropertiesOfObjectType(instantiatedBaseType));
+                    callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(instantiatedBaseType, 0 /* Call */));
+                    constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(instantiatedBaseType, 1 /* Construct */));
+                    stringIndexInfo = stringIndexInfo || getIndexInfoOfType(instantiatedBaseType, 0 /* String */);
+                    numberIndexInfo = numberIndexInfo || getIndexInfoOfType(instantiatedBaseType, 1 /* Number */);
+                }
+            }
+            setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function resolveClassOrInterfaceMembers(type) {
+            resolveObjectTypeMembers(type, resolveDeclaredMembers(type), emptyArray, emptyArray);
+        }
+        function resolveTypeReferenceMembers(type) {
+            var source = resolveDeclaredMembers(type.target);
+            var typeParameters = ts.concatenate(source.typeParameters, [source.thisType]);
+            var typeArguments = type.typeArguments && type.typeArguments.length === typeParameters.length ?
+                type.typeArguments : ts.concatenate(type.typeArguments, [type]);
+            resolveObjectTypeMembers(type, source, typeParameters, typeArguments);
+        }
+        function createSignature(declaration, typeParameters, thisType, parameters, resolvedReturnType, typePredicate, minArgumentCount, hasRestParameter, hasStringLiterals) {
+            var sig = new Signature(checker);
+            sig.declaration = declaration;
+            sig.typeParameters = typeParameters;
+            sig.parameters = parameters;
+            sig.thisType = thisType;
+            sig.resolvedReturnType = resolvedReturnType;
+            sig.typePredicate = typePredicate;
+            sig.minArgumentCount = minArgumentCount;
+            sig.hasRestParameter = hasRestParameter;
+            sig.hasStringLiterals = hasStringLiterals;
+            return sig;
+        }
+        function cloneSignature(sig) {
+            return createSignature(sig.declaration, sig.typeParameters, sig.thisType, sig.parameters, sig.resolvedReturnType, sig.typePredicate, sig.minArgumentCount, sig.hasRestParameter, sig.hasStringLiterals);
+        }
+        function getDefaultConstructSignatures(classType) {
+            var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+            var baseSignatures = getSignaturesOfType(baseConstructorType, 1 /* Construct */);
+            if (baseSignatures.length === 0) {
+                return [createSignature(undefined, classType.localTypeParameters, undefined, emptyArray, classType, /*typePredicate*/ undefined, 0, /*hasRestParameter*/ false, /*hasStringLiterals*/ false)];
+            }
+            var baseTypeNode = getBaseTypeNodeOfClass(classType);
+            var typeArguments = ts.map(baseTypeNode.typeArguments, getTypeFromTypeNode);
+            var typeArgCount = typeArguments ? typeArguments.length : 0;
+            var result = [];
+            for (var _i = 0, baseSignatures_1 = baseSignatures; _i < baseSignatures_1.length; _i++) {
+                var baseSig = baseSignatures_1[_i];
+                var typeParamCount = baseSig.typeParameters ? baseSig.typeParameters.length : 0;
+                if (typeParamCount === typeArgCount) {
+                    var sig = typeParamCount ? getSignatureInstantiation(baseSig, typeArguments) : cloneSignature(baseSig);
+                    sig.typeParameters = classType.localTypeParameters;
+                    sig.resolvedReturnType = classType;
+                    result.push(sig);
+                }
+            }
+            return result;
+        }
+        function createTupleTypeMemberSymbols(memberTypes) {
+            var members = {};
+            for (var i = 0; i < memberTypes.length; i++) {
+                var symbol = createSymbol(4 /* Property */ | 67108864 /* Transient */, "" + i);
+                symbol.type = memberTypes[i];
+                members[i] = symbol;
+            }
+            return members;
+        }
+        function resolveTupleTypeMembers(type) {
+            var arrayElementType = getUnionType(type.elementTypes, /*noSubtypeReduction*/ true);
+            // Make the tuple type itself the 'this' type by including an extra type argument
+            var arrayType = resolveStructuredTypeMembers(createTypeFromGenericGlobalType(globalArrayType, [arrayElementType, type]));
+            var members = createTupleTypeMemberSymbols(type.elementTypes);
+            addInheritedMembers(members, arrayType.properties);
+            setObjectTypeMembers(type, members, arrayType.callSignatures, arrayType.constructSignatures, arrayType.stringIndexInfo, arrayType.numberIndexInfo);
+        }
+        function findMatchingSignature(signatureList, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes) {
+            for (var _i = 0, signatureList_1 = signatureList; _i < signatureList_1.length; _i++) {
+                var s = signatureList_1[_i];
+                if (compareSignaturesIdentical(s, signature, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypesIdentical)) {
+                    return s;
+                }
+            }
+        }
+        function findMatchingSignatures(signatureLists, signature, listIndex) {
+            if (signature.typeParameters) {
+                // We require an exact match for generic signatures, so we only return signatures from the first
+                // signature list and only if they have exact matches in the other signature lists.
+                if (listIndex > 0) {
+                    return undefined;
+                }
+                for (var i = 1; i < signatureLists.length; i++) {
+                    if (!findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false)) {
+                        return undefined;
+                    }
+                }
+                return [signature];
+            }
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                // Allow matching non-generic signatures to have excess parameters and different return types
+                var match = i === listIndex ? signature : findMatchingSignature(signatureLists[i], signature, /*partialMatch*/ true, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true);
+                if (!match) {
+                    return undefined;
+                }
+                if (!ts.contains(result, match)) {
+                    (result || (result = [])).push(match);
+                }
+            }
+            return result;
+        }
+        // The signatures of a union type are those signatures that are present in each of the constituent types.
+        // Generic signatures must match exactly, but non-generic signatures are allowed to have extra optional
+        // parameters and may differ in return types. When signatures differ in return types, the resulting return
+        // type is the union of the constituent return types.
+        function getUnionSignatures(types, kind) {
+            var signatureLists = ts.map(types, function (t) { return getSignaturesOfType(t, kind); });
+            var result = undefined;
+            for (var i = 0; i < signatureLists.length; i++) {
+                for (var _i = 0, _a = signatureLists[i]; _i < _a.length; _i++) {
+                    var signature = _a[_i];
+                    // Only process signatures with parameter lists that aren't already in the result list
+                    if (!result || !findMatchingSignature(result, signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true)) {
+                        var unionSignatures = findMatchingSignatures(signatureLists, signature, i);
+                        if (unionSignatures) {
+                            var s = signature;
+                            // Union the result types when more than one signature matches
+                            if (unionSignatures.length > 1) {
+                                s = cloneSignature(signature);
+                                if (ts.forEach(unionSignatures, function (sig) { return sig.thisType; })) {
+                                    s.thisType = getUnionType(ts.map(unionSignatures, function (sig) { return sig.thisType || anyType; }));
+                                }
+                                // Clear resolved return type we possibly got from cloneSignature
+                                s.resolvedReturnType = undefined;
+                                s.unionSignatures = unionSignatures;
+                            }
+                            (result || (result = [])).push(s);
+                        }
+                    }
+                }
+            }
+            return result || emptyArray;
+        }
+        function getUnionIndexInfo(types, kind) {
+            var indexTypes = [];
+            var isAnyReadonly = false;
+            for (var _i = 0, types_1 = types; _i < types_1.length; _i++) {
+                var type = types_1[_i];
+                var indexInfo = getIndexInfoOfType(type, kind);
+                if (!indexInfo) {
+                    return undefined;
+                }
+                indexTypes.push(indexInfo.type);
+                isAnyReadonly = isAnyReadonly || indexInfo.isReadonly;
+            }
+            return createIndexInfo(getUnionType(indexTypes), isAnyReadonly);
+        }
+        function resolveUnionTypeMembers(type) {
+            // The members and properties collections are empty for union types. To get all properties of a union
+            // type use getPropertiesOfType (only the language service uses this).
+            var callSignatures = getUnionSignatures(type.types, 0 /* Call */);
+            var constructSignatures = getUnionSignatures(type.types, 1 /* Construct */);
+            var stringIndexInfo = getUnionIndexInfo(type.types, 0 /* String */);
+            var numberIndexInfo = getUnionIndexInfo(type.types, 1 /* Number */);
+            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function intersectTypes(type1, type2) {
+            return !type1 ? type2 : !type2 ? type1 : getIntersectionType([type1, type2]);
+        }
+        function intersectIndexInfos(info1, info2) {
+            return !info1 ? info2 : !info2 ? info1 : createIndexInfo(getIntersectionType([info1.type, info2.type]), info1.isReadonly && info2.isReadonly);
+        }
+        function resolveIntersectionTypeMembers(type) {
+            // The members and properties collections are empty for intersection types. To get all properties of an
+            // intersection type use getPropertiesOfType (only the language service uses this).
+            var callSignatures = emptyArray;
+            var constructSignatures = emptyArray;
+            var stringIndexInfo = undefined;
+            var numberIndexInfo = undefined;
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                callSignatures = ts.concatenate(callSignatures, getSignaturesOfType(t, 0 /* Call */));
+                constructSignatures = ts.concatenate(constructSignatures, getSignaturesOfType(t, 1 /* Construct */));
+                stringIndexInfo = intersectIndexInfos(stringIndexInfo, getIndexInfoOfType(t, 0 /* String */));
+                numberIndexInfo = intersectIndexInfos(numberIndexInfo, getIndexInfoOfType(t, 1 /* Number */));
+            }
+            setObjectTypeMembers(type, emptySymbols, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+        }
+        function resolveAnonymousTypeMembers(type) {
+            var symbol = type.symbol;
+            if (type.target) {
+                var members = createInstantiatedSymbolTable(getPropertiesOfObjectType(type.target), type.mapper, /*mappingThisOnly*/ false);
+                var callSignatures = instantiateList(getSignaturesOfType(type.target, 0 /* Call */), type.mapper, instantiateSignature);
+                var constructSignatures = instantiateList(getSignaturesOfType(type.target, 1 /* Construct */), type.mapper, instantiateSignature);
+                var stringIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 0 /* String */), type.mapper);
+                var numberIndexInfo = instantiateIndexInfo(getIndexInfoOfType(type.target, 1 /* Number */), type.mapper);
+                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else if (symbol.flags & 2048 /* TypeLiteral */) {
+                var members = symbol.members;
+                var callSignatures = getSignaturesOfSymbol(members["__call"]);
+                var constructSignatures = getSignaturesOfSymbol(members["__new"]);
+                var stringIndexInfo = getIndexInfoOfSymbol(symbol, 0 /* String */);
+                var numberIndexInfo = getIndexInfoOfSymbol(symbol, 1 /* Number */);
+                setObjectTypeMembers(type, members, callSignatures, constructSignatures, stringIndexInfo, numberIndexInfo);
+            }
+            else {
+                // Combinations of function, class, enum and module
+                var members = emptySymbols;
+                var constructSignatures = emptyArray;
+                if (symbol.flags & 1952 /* HasExports */) {
+                    members = getExportsOfSymbol(symbol);
+                }
+                if (symbol.flags & 32 /* Class */) {
+                    var classType = getDeclaredTypeOfClassOrInterface(symbol);
+                    constructSignatures = getSignaturesOfSymbol(symbol.members["__constructor"]);
+                    if (!constructSignatures.length) {
+                        constructSignatures = getDefaultConstructSignatures(classType);
+                    }
+                    var baseConstructorType = getBaseConstructorTypeOfClass(classType);
+                    if (baseConstructorType.flags & 80896 /* ObjectType */) {
+                        members = createSymbolTable(getNamedMembers(members));
+                        addInheritedMembers(members, getPropertiesOfObjectType(baseConstructorType));
+                    }
+                }
+                var numberIndexInfo = symbol.flags & 384 /* Enum */ ? enumNumberIndexInfo : undefined;
+                setObjectTypeMembers(type, members, emptyArray, constructSignatures, undefined, numberIndexInfo);
+                // We resolve the members before computing the signatures because a signature may use
+                // typeof with a qualified name expression that circularly references the type we are
+                // in the process of resolving (see issue #6072). The temporarily empty signature list
+                // will never be observed because a qualified name can't reference signatures.
+                if (symbol.flags & (16 /* Function */ | 8192 /* Method */)) {
+                    type.callSignatures = getSignaturesOfSymbol(symbol);
+                }
+            }
+        }
+        function resolveStructuredTypeMembers(type) {
+            if (!type.members) {
+                if (type.flags & 4096 /* Reference */) {
+                    resolveTypeReferenceMembers(type);
+                }
+                else if (type.flags & (1024 /* Class */ | 2048 /* Interface */)) {
+                    resolveClassOrInterfaceMembers(type);
+                }
+                else if (type.flags & 65536 /* Anonymous */) {
+                    resolveAnonymousTypeMembers(type);
+                }
+                else if (type.flags & 8192 /* Tuple */) {
+                    resolveTupleTypeMembers(type);
+                }
+                else if (type.flags & 16384 /* Union */) {
+                    resolveUnionTypeMembers(type);
+                }
+                else if (type.flags & 32768 /* Intersection */) {
+                    resolveIntersectionTypeMembers(type);
+                }
+            }
+            return type;
+        }
+        /** Return properties of an object type or an empty array for other types */
+        function getPropertiesOfObjectType(type) {
+            if (type.flags & 80896 /* ObjectType */) {
+                return resolveStructuredTypeMembers(type).properties;
+            }
+            return emptyArray;
+        }
+        /** If the given type is an object type and that type has a property by the given name,
+         * return the symbol for that property. Otherwise return undefined. */
+        function getPropertyOfObjectType(type, name) {
+            if (type.flags & 80896 /* ObjectType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (ts.hasProperty(resolved.members, name)) {
+                    var symbol = resolved.members[name];
+                    if (symbolIsValue(symbol)) {
+                        return symbol;
+                    }
+                }
+            }
+        }
+        function getPropertiesOfUnionOrIntersectionType(type) {
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var current = _a[_i];
+                for (var _b = 0, _c = getPropertiesOfType(current); _b < _c.length; _b++) {
+                    var prop = _c[_b];
+                    getPropertyOfUnionOrIntersectionType(type, prop.name);
+                }
+                // The properties of a union type are those that are present in all constituent types, so
+                // we only need to check the properties of the first type
+                if (type.flags & 16384 /* Union */) {
+                    break;
+                }
+            }
+            return type.resolvedProperties ? symbolsToArray(type.resolvedProperties) : emptyArray;
+        }
+        function getPropertiesOfType(type) {
+            type = getApparentType(type);
+            return type.flags & 49152 /* UnionOrIntersection */ ? getPropertiesOfUnionOrIntersectionType(type) : getPropertiesOfObjectType(type);
+        }
+        /**
+         * The apparent type of a type parameter is the base constraint instantiated with the type parameter
+         * as the type argument for the 'this' type.
+         */
+        function getApparentTypeOfTypeParameter(type) {
+            if (!type.resolvedApparentType) {
+                var constraintType = getConstraintOfTypeParameter(type);
+                while (constraintType && constraintType.flags & 512 /* TypeParameter */) {
+                    constraintType = getConstraintOfTypeParameter(constraintType);
+                }
+                type.resolvedApparentType = getTypeWithThisArgument(constraintType || emptyObjectType, type);
+            }
+            return type.resolvedApparentType;
+        }
+        /**
+         * For a type parameter, return the base constraint of the type parameter. For the string, number,
+         * boolean, and symbol primitive types, return the corresponding object types. Otherwise return the
+         * type itself. Note that the apparent type of a union type is the union type itself.
+         */
+        function getApparentType(type) {
+            if (type.flags & 512 /* TypeParameter */) {
+                type = getApparentTypeOfTypeParameter(type);
+            }
+            if (type.flags & 258 /* StringLike */) {
+                type = globalStringType;
+            }
+            else if (type.flags & 132 /* NumberLike */) {
+                type = globalNumberType;
+            }
+            else if (type.flags & 8 /* Boolean */) {
+                type = globalBooleanType;
+            }
+            else if (type.flags & 16777216 /* ESSymbol */) {
+                type = getGlobalESSymbolType();
+            }
+            return type;
+        }
+        function createUnionOrIntersectionProperty(containingType, name) {
+            var types = containingType.types;
+            var props;
+            // Flags we want to propagate to the result if they exist in all source symbols
+            var commonFlags = (containingType.flags & 32768 /* Intersection */) ? 536870912 /* Optional */ : 0 /* None */;
+            for (var _i = 0, types_2 = types; _i < types_2.length; _i++) {
+                var current = types_2[_i];
+                var type = getApparentType(current);
+                if (type !== unknownType) {
+                    var prop = getPropertyOfType(type, name);
+                    if (prop && !(getDeclarationFlagsFromSymbol(prop) & (8 /* Private */ | 16 /* Protected */))) {
+                        commonFlags &= prop.flags;
+                        if (!props) {
+                            props = [prop];
+                        }
+                        else if (!ts.contains(props, prop)) {
+                            props.push(prop);
+                        }
+                    }
+                    else if (containingType.flags & 16384 /* Union */) {
+                        // A union type requires the property to be present in all constituent types
+                        return undefined;
+                    }
+                }
+            }
+            if (!props) {
+                return undefined;
+            }
+            if (props.length === 1) {
+                return props[0];
+            }
+            var propTypes = [];
+            var declarations = [];
+            for (var _a = 0, props_1 = props; _a < props_1.length; _a++) {
+                var prop = props_1[_a];
+                if (prop.declarations) {
+                    ts.addRange(declarations, prop.declarations);
+                }
+                propTypes.push(getTypeOfSymbol(prop));
+            }
+            var result = createSymbol(4 /* Property */ |
+                67108864 /* Transient */ |
+                268435456 /* SyntheticProperty */ |
+                commonFlags, name);
+            result.containingType = containingType;
+            result.declarations = declarations;
+            result.type = containingType.flags & 16384 /* Union */ ? getUnionType(propTypes) : getIntersectionType(propTypes);
+            return result;
+        }
+        function getPropertyOfUnionOrIntersectionType(type, name) {
+            var properties = type.resolvedProperties || (type.resolvedProperties = {});
+            if (ts.hasProperty(properties, name)) {
+                return properties[name];
+            }
+            var property = createUnionOrIntersectionProperty(type, name);
+            if (property) {
+                properties[name] = property;
+            }
+            return property;
+        }
+        // Return the symbol for the property with the given name in the given type. Creates synthetic union properties when
+        // necessary, maps primitive types and type parameters are to their apparent types, and augments with properties from
+        // Object and Function as appropriate.
+        function getPropertyOfType(type, name) {
+            type = getApparentType(type);
+            if (type.flags & 80896 /* ObjectType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (ts.hasProperty(resolved.members, name)) {
+                    var symbol = resolved.members[name];
+                    if (symbolIsValue(symbol)) {
+                        return symbol;
+                    }
+                }
+                if (resolved === anyFunctionType || resolved.callSignatures.length || resolved.constructSignatures.length) {
+                    var symbol = getPropertyOfObjectType(globalFunctionType, name);
+                    if (symbol) {
+                        return symbol;
+                    }
+                }
+                return getPropertyOfObjectType(globalObjectType, name);
+            }
+            if (type.flags & 49152 /* UnionOrIntersection */) {
+                return getPropertyOfUnionOrIntersectionType(type, name);
+            }
+            return undefined;
+        }
+        function getSignaturesOfStructuredType(type, kind) {
+            if (type.flags & 130048 /* StructuredType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 /* Call */ ? resolved.callSignatures : resolved.constructSignatures;
+            }
+            return emptyArray;
+        }
+        /**
+         * Return the signatures of the given kind in the given type. Creates synthetic union signatures when necessary and
+         * maps primitive types and type parameters are to their apparent types.
+         */
+        function getSignaturesOfType(type, kind) {
+            return getSignaturesOfStructuredType(getApparentType(type), kind);
+        }
+        function getIndexInfoOfStructuredType(type, kind) {
+            if (type.flags & 130048 /* StructuredType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return kind === 0 /* String */ ? resolved.stringIndexInfo : resolved.numberIndexInfo;
+            }
+        }
+        function getIndexTypeOfStructuredType(type, kind) {
+            var info = getIndexInfoOfStructuredType(type, kind);
+            return info && info.type;
+        }
+        // Return the indexing info of the given kind in the given type. Creates synthetic union index types when necessary and
+        // maps primitive types and type parameters are to their apparent types.
+        function getIndexInfoOfType(type, kind) {
+            return getIndexInfoOfStructuredType(getApparentType(type), kind);
+        }
+        // Return the index type of the given kind in the given type. Creates synthetic union index types when necessary and
+        // maps primitive types and type parameters are to their apparent types.
+        function getIndexTypeOfType(type, kind) {
+            return getIndexTypeOfStructuredType(getApparentType(type), kind);
+        }
+        function getImplicitIndexTypeOfType(type, kind) {
+            if (isObjectLiteralType(type)) {
+                var propTypes = [];
+                for (var _i = 0, _a = getPropertiesOfType(type); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
+                        propTypes.push(getTypeOfSymbol(prop));
+                    }
+                }
+                if (propTypes.length) {
+                    return getUnionType(propTypes);
+                }
+            }
+            return undefined;
+        }
+        function getTypeParametersFromJSDocTemplate(declaration) {
+            if (declaration.flags & 134217728 /* JavaScriptFile */) {
+                var templateTag = ts.getJSDocTemplateTag(declaration);
+                if (templateTag) {
+                    return getTypeParametersFromDeclaration(templateTag.typeParameters);
+                }
+            }
+            return undefined;
+        }
+        // Return list of type parameters with duplicates removed (duplicate identifier errors are generated in the actual
+        // type checking functions).
+        function getTypeParametersFromDeclaration(typeParameterDeclarations) {
+            var result = [];
+            ts.forEach(typeParameterDeclarations, function (node) {
+                var tp = getDeclaredTypeOfTypeParameter(node.symbol);
+                if (!ts.contains(result, tp)) {
+                    result.push(tp);
+                }
+            });
+            return result;
+        }
+        function symbolsToArray(symbols) {
+            var result = [];
+            for (var id in symbols) {
+                if (!isReservedMemberName(id)) {
+                    result.push(symbols[id]);
+                }
+            }
+            return result;
+        }
+        function isOptionalParameter(node) {
+            if (node.flags & 134217728 /* JavaScriptFile */) {
+                if (node.type && node.type.kind === 268 /* JSDocOptionalType */) {
+                    return true;
+                }
+                var paramTag = ts.getCorrespondingJSDocParameterTag(node);
+                if (paramTag) {
+                    if (paramTag.isBracketed) {
+                        return true;
+                    }
+                    if (paramTag.typeExpression) {
+                        return paramTag.typeExpression.type.kind === 268 /* JSDocOptionalType */;
+                    }
+                }
+            }
+            if (ts.hasQuestionToken(node)) {
+                return true;
+            }
+            if (node.initializer) {
+                var signatureDeclaration = node.parent;
+                var signature = getSignatureFromDeclaration(signatureDeclaration);
+                var parameterIndex = ts.indexOf(signatureDeclaration.parameters, node);
+                ts.Debug.assert(parameterIndex >= 0);
+                return parameterIndex >= signature.minArgumentCount;
+            }
+            return false;
+        }
+        function createTypePredicateFromTypePredicateNode(node) {
+            if (node.parameterName.kind === 69 /* Identifier */) {
+                var parameterName = node.parameterName;
+                return {
+                    kind: 1 /* Identifier */,
+                    parameterName: parameterName ? parameterName.text : undefined,
+                    parameterIndex: parameterName ? getTypePredicateParameterIndex(node.parent.parameters, parameterName) : undefined,
+                    type: getTypeFromTypeNode(node.type)
+                };
+            }
+            else {
+                return {
+                    kind: 0 /* This */,
+                    type: getTypeFromTypeNode(node.type)
+                };
+            }
+        }
+        function getSignatureFromDeclaration(declaration) {
+            var links = getNodeLinks(declaration);
+            if (!links.resolvedSignature) {
+                var parameters = [];
+                var hasStringLiterals = false;
+                var minArgumentCount = -1;
+                var thisType = undefined;
+                var hasThisParameter = void 0;
+                var isJSConstructSignature = ts.isJSDocConstructSignature(declaration);
+                // If this is a JSDoc construct signature, then skip the first parameter in the
+                // parameter list.  The first parameter represents the return type of the construct
+                // signature.
+                for (var i = isJSConstructSignature ? 1 : 0, n = declaration.parameters.length; i < n; i++) {
+                    var param = declaration.parameters[i];
+                    var paramSymbol = param.symbol;
+                    // Include parameter symbol instead of property symbol in the signature
+                    if (paramSymbol && !!(paramSymbol.flags & 4 /* Property */) && !ts.isBindingPattern(param.name)) {
+                        var resolvedSymbol = resolveName(param, paramSymbol.name, 107455 /* Value */, undefined, undefined);
+                        paramSymbol = resolvedSymbol;
+                    }
+                    if (i === 0 && paramSymbol.name === "this") {
+                        hasThisParameter = true;
+                        thisType = param.type ? getTypeFromTypeNode(param.type) : unknownType;
+                    }
+                    else {
+                        parameters.push(paramSymbol);
+                    }
+                    if (param.type && param.type.kind === 166 /* StringLiteralType */) {
+                        hasStringLiterals = true;
+                    }
+                    if (param.initializer || param.questionToken || param.dotDotDotToken) {
+                        if (minArgumentCount < 0) {
+                            minArgumentCount = i - (hasThisParameter ? 1 : 0);
+                        }
+                    }
+                    else {
+                        // If we see any required parameters, it means the prior ones were not in fact optional.
+                        minArgumentCount = -1;
+                    }
+                }
+                // If only one accessor includes a this-type annotation, the other behaves as if it had the same type annotation
+                if ((declaration.kind === 149 /* GetAccessor */ || declaration.kind === 150 /* SetAccessor */) &&
+                    !ts.hasDynamicName(declaration) &&
+                    (!hasThisParameter || thisType === unknownType)) {
+                    var otherKind = declaration.kind === 149 /* GetAccessor */ ? 150 /* SetAccessor */ : 149 /* GetAccessor */;
+                    var setter = ts.getDeclarationOfKind(declaration.symbol, otherKind);
+                    thisType = getAnnotatedAccessorThisType(setter);
+                }
+                if (minArgumentCount < 0) {
+                    minArgumentCount = declaration.parameters.length - (hasThisParameter ? 1 : 0);
+                }
+                if (isJSConstructSignature) {
+                    minArgumentCount--;
+                }
+                var classType = declaration.kind === 148 /* Constructor */ ?
+                    getDeclaredTypeOfClassOrInterface(getMergedSymbol(declaration.parent.symbol))
+                    : undefined;
+                var typeParameters = classType ? classType.localTypeParameters :
+                    declaration.typeParameters ? getTypeParametersFromDeclaration(declaration.typeParameters) :
+                        getTypeParametersFromJSDocTemplate(declaration);
+                var returnType = getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType);
+                var typePredicate = declaration.type && declaration.type.kind === 154 /* TypePredicate */ ?
+                    createTypePredicateFromTypePredicateNode(declaration.type) :
+                    undefined;
+                links.resolvedSignature = createSignature(declaration, typeParameters, thisType, parameters, returnType, typePredicate, minArgumentCount, ts.hasRestParameter(declaration), hasStringLiterals);
+            }
+            return links.resolvedSignature;
+        }
+        function getSignatureReturnTypeFromDeclaration(declaration, minArgumentCount, isJSConstructSignature, classType) {
+            if (isJSConstructSignature) {
+                return getTypeFromTypeNode(declaration.parameters[0].type);
+            }
+            else if (classType) {
+                return classType;
+            }
+            else if (declaration.type) {
+                return getTypeFromTypeNode(declaration.type);
+            }
+            if (declaration.flags & 134217728 /* JavaScriptFile */) {
+                var type = getReturnTypeFromJSDocComment(declaration);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            // TypeScript 1.0 spec (April 2014):
+            // If only one accessor includes a type annotation, the other behaves as if it had the same type annotation.
+            if (declaration.kind === 149 /* GetAccessor */ && !ts.hasDynamicName(declaration)) {
+                var setter = ts.getDeclarationOfKind(declaration.symbol, 150 /* SetAccessor */);
+                return getAnnotatedAccessorType(setter);
+            }
+            if (ts.nodeIsMissing(declaration.body)) {
+                return anyType;
+            }
+        }
+        function getSignaturesOfSymbol(symbol) {
+            if (!symbol)
+                return emptyArray;
+            var result = [];
+            for (var i = 0, len = symbol.declarations.length; i < len; i++) {
+                var node = symbol.declarations[i];
+                switch (node.kind) {
+                    case 156 /* FunctionType */:
+                    case 157 /* ConstructorType */:
+                    case 220 /* FunctionDeclaration */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 148 /* Constructor */:
+                    case 151 /* CallSignature */:
+                    case 152 /* ConstructSignature */:
+                    case 153 /* IndexSignature */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 269 /* JSDocFunctionType */:
+                        // Don't include signature if node is the implementation of an overloaded function. A node is considered
+                        // an implementation node if it has a body and the previous node is of the same kind and immediately
+                        // precedes the implementation node (i.e. has the same parent and ends where the implementation starts).
+                        if (i > 0 && node.body) {
+                            var previous = symbol.declarations[i - 1];
+                            if (node.parent === previous.parent && node.kind === previous.kind && node.pos === previous.end) {
+                                break;
+                            }
+                        }
+                        result.push(getSignatureFromDeclaration(node));
+                }
+            }
+            return result;
+        }
+        function resolveExternalModuleTypeByLiteral(name) {
+            var moduleSym = resolveExternalModuleName(name, name);
+            if (moduleSym) {
+                var resolvedModuleSymbol = resolveExternalModuleSymbol(moduleSym);
+                if (resolvedModuleSymbol) {
+                    return getTypeOfSymbol(resolvedModuleSymbol);
+                }
+            }
+            return anyType;
+        }
+        function getReturnTypeOfSignature(signature) {
+            if (!signature.resolvedReturnType) {
+                if (!pushTypeResolution(signature, 3 /* ResolvedReturnType */)) {
+                    return unknownType;
+                }
+                var type = void 0;
+                if (signature.target) {
+                    type = instantiateType(getReturnTypeOfSignature(signature.target), signature.mapper);
+                }
+                else if (signature.unionSignatures) {
+                    type = getUnionType(ts.map(signature.unionSignatures, getReturnTypeOfSignature));
+                }
+                else {
+                    type = getReturnTypeFromBody(signature.declaration);
+                }
+                if (!popTypeResolution()) {
+                    type = anyType;
+                    if (compilerOptions.noImplicitAny) {
+                        var declaration = signature.declaration;
+                        if (declaration.name) {
+                            error(declaration.name, ts.Diagnostics._0_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions, ts.declarationNameToString(declaration.name));
+                        }
+                        else {
+                            error(declaration, ts.Diagnostics.Function_implicitly_has_return_type_any_because_it_does_not_have_a_return_type_annotation_and_is_referenced_directly_or_indirectly_in_one_of_its_return_expressions);
+                        }
+                    }
+                }
+                signature.resolvedReturnType = type;
+            }
+            return signature.resolvedReturnType;
+        }
+        function getRestTypeOfSignature(signature) {
+            if (signature.hasRestParameter) {
+                var type = getTypeOfSymbol(ts.lastOrUndefined(signature.parameters));
+                if (type.flags & 4096 /* Reference */ && type.target === globalArrayType) {
+                    return type.typeArguments[0];
+                }
+            }
+            return anyType;
+        }
+        function getSignatureInstantiation(signature, typeArguments) {
+            return instantiateSignature(signature, createTypeMapper(signature.typeParameters, typeArguments), /*eraseTypeParameters*/ true);
+        }
+        function getErasedSignature(signature) {
+            if (!signature.typeParameters)
+                return signature;
+            if (!signature.erasedSignatureCache) {
+                signature.erasedSignatureCache = instantiateSignature(signature, createTypeEraser(signature.typeParameters), /*eraseTypeParameters*/ true);
+            }
+            return signature.erasedSignatureCache;
+        }
+        function getOrCreateTypeFromSignature(signature) {
+            // There are two ways to declare a construct signature, one is by declaring a class constructor
+            // using the constructor keyword, and the other is declaring a bare construct signature in an
+            // object type literal or interface (using the new keyword). Each way of declaring a constructor
+            // will result in a different declaration kind.
+            if (!signature.isolatedSignatureType) {
+                var isConstructor = signature.declaration.kind === 148 /* Constructor */ || signature.declaration.kind === 152 /* ConstructSignature */;
+                var type = createObjectType(65536 /* Anonymous */ | 262144 /* FromSignature */);
+                type.members = emptySymbols;
+                type.properties = emptyArray;
+                type.callSignatures = !isConstructor ? [signature] : emptyArray;
+                type.constructSignatures = isConstructor ? [signature] : emptyArray;
+                signature.isolatedSignatureType = type;
+            }
+            return signature.isolatedSignatureType;
+        }
+        function getIndexSymbol(symbol) {
+            return symbol.members["__index"];
+        }
+        function getIndexDeclarationOfSymbol(symbol, kind) {
+            var syntaxKind = kind === 1 /* Number */ ? 130 /* NumberKeyword */ : 132 /* StringKeyword */;
+            var indexSymbol = getIndexSymbol(symbol);
+            if (indexSymbol) {
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var node = decl;
+                    if (node.parameters.length === 1) {
+                        var parameter = node.parameters[0];
+                        if (parameter && parameter.type && parameter.type.kind === syntaxKind) {
+                            return node;
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function createIndexInfo(type, isReadonly, declaration) {
+            return { type: type, isReadonly: isReadonly, declaration: declaration };
+        }
+        function getIndexInfoOfSymbol(symbol, kind) {
+            var declaration = getIndexDeclarationOfSymbol(symbol, kind);
+            if (declaration) {
+                return createIndexInfo(declaration.type ? getTypeFromTypeNode(declaration.type) : anyType, (declaration.flags & 64 /* Readonly */) !== 0, declaration);
+            }
+            return undefined;
+        }
+        function getConstraintDeclaration(type) {
+            return ts.getDeclarationOfKind(type.symbol, 141 /* TypeParameter */).constraint;
+        }
+        function hasConstraintReferenceTo(type, target) {
+            var checked;
+            while (type && !(type.flags & 33554432 /* ThisType */) && type.flags & 512 /* TypeParameter */ && !ts.contains(checked, type)) {
+                if (type === target) {
+                    return true;
+                }
+                (checked || (checked = [])).push(type);
+                var constraintDeclaration = getConstraintDeclaration(type);
+                type = constraintDeclaration && getTypeFromTypeNode(constraintDeclaration);
+            }
+            return false;
+        }
+        function getConstraintOfTypeParameter(typeParameter) {
+            if (!typeParameter.constraint) {
+                if (typeParameter.target) {
+                    var targetConstraint = getConstraintOfTypeParameter(typeParameter.target);
+                    typeParameter.constraint = targetConstraint ? instantiateType(targetConstraint, typeParameter.mapper) : noConstraintType;
+                }
+                else {
+                    var constraintDeclaration = getConstraintDeclaration(typeParameter);
+                    var constraint = getTypeFromTypeNode(constraintDeclaration);
+                    if (hasConstraintReferenceTo(constraint, typeParameter)) {
+                        error(constraintDeclaration, ts.Diagnostics.Type_parameter_0_has_a_circular_constraint, typeToString(typeParameter));
+                        constraint = unknownType;
+                    }
+                    typeParameter.constraint = constraint;
+                }
+            }
+            return typeParameter.constraint === noConstraintType ? undefined : typeParameter.constraint;
+        }
+        function getParentSymbolOfTypeParameter(typeParameter) {
+            return getSymbolOfNode(ts.getDeclarationOfKind(typeParameter.symbol, 141 /* TypeParameter */).parent);
+        }
+        function getTypeListId(types) {
+            if (types) {
+                switch (types.length) {
+                    case 1:
+                        return "" + types[0].id;
+                    case 2:
+                        return types[0].id + "," + types[1].id;
+                    default:
+                        var result = "";
+                        for (var i = 0; i < types.length; i++) {
+                            if (i > 0) {
+                                result += ",";
+                            }
+                            result += types[i].id;
+                        }
+                        return result;
+                }
+            }
+            return "";
+        }
+        // This function is used to propagate certain flags when creating new object type references and union types.
+        // It is only necessary to do so if a constituent type might be the undefined type, the null type, the type
+        // of an object literal or the anyFunctionType. This is because there are operations in the type checker
+        // that care about the presence of such types at arbitrary depth in a containing type.
+        function getPropagatingFlagsOfTypes(types, excludeKinds) {
+            var result = 0;
+            for (var _i = 0, types_3 = types; _i < types_3.length; _i++) {
+                var type = types_3[_i];
+                if (!(type.flags & excludeKinds)) {
+                    result |= type.flags;
+                }
+            }
+            return result & 14680064 /* PropagatingFlags */;
+        }
+        function createTypeReference(target, typeArguments) {
+            var id = getTypeListId(typeArguments);
+            var type = target.instantiations[id];
+            if (!type) {
+                var propagatedFlags = typeArguments ? getPropagatingFlagsOfTypes(typeArguments, /*excludeKinds*/ 0) : 0;
+                var flags = 4096 /* Reference */ | propagatedFlags;
+                type = target.instantiations[id] = createObjectType(flags, target.symbol);
+                type.target = target;
+                type.typeArguments = typeArguments;
+            }
+            return type;
+        }
+        // Get type from reference to class or interface
+        function getTypeFromClassOrInterfaceReference(node, symbol) {
+            var type = getDeclaredTypeOfSymbol(getMergedSymbol(symbol));
+            var typeParameters = type.localTypeParameters;
+            if (typeParameters) {
+                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
+                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, typeToString(type, /*enclosingDeclaration*/ undefined, 1 /* WriteArrayAsGenericType */), typeParameters.length);
+                    return unknownType;
+                }
+                // In a type reference, the outer type parameters of the referenced class or interface are automatically
+                // supplied as type arguments and the type reference only specifies arguments for the local type parameters
+                // of the class or interface.
+                return createTypeReference(type, ts.concatenate(type.outerTypeParameters, ts.map(node.typeArguments, getTypeFromTypeNode)));
+            }
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, typeToString(type));
+                return unknownType;
+            }
+            return type;
+        }
+        // Get type from reference to type alias. When a type alias is generic, the declared type of the type alias may include
+        // references to the type parameters of the alias. We replace those with the actual type arguments by instantiating the
+        // declared type. Instantiations are cached using the type identities of the type arguments as the key.
+        function getTypeFromTypeAliasReference(node, symbol) {
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var links = getSymbolLinks(symbol);
+            var typeParameters = links.typeParameters;
+            if (typeParameters) {
+                if (!node.typeArguments || node.typeArguments.length !== typeParameters.length) {
+                    error(node, ts.Diagnostics.Generic_type_0_requires_1_type_argument_s, symbolToString(symbol), typeParameters.length);
+                    return unknownType;
+                }
+                var typeArguments = ts.map(node.typeArguments, getTypeFromTypeNode);
+                var id = getTypeListId(typeArguments);
+                return links.instantiations[id] || (links.instantiations[id] = instantiateType(type, createTypeMapper(typeParameters, typeArguments)));
+            }
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return type;
+        }
+        // Get type from reference to named type that cannot be generic (enum or type parameter)
+        function getTypeFromNonGenericTypeReference(node, symbol) {
+            if (node.typeArguments) {
+                error(node, ts.Diagnostics.Type_0_is_not_generic, symbolToString(symbol));
+                return unknownType;
+            }
+            return getDeclaredTypeOfSymbol(symbol);
+        }
+        function getTypeReferenceName(node) {
+            switch (node.kind) {
+                case 155 /* TypeReference */:
+                    return node.typeName;
+                case 267 /* JSDocTypeReference */:
+                    return node.name;
+                case 194 /* ExpressionWithTypeArguments */:
+                    // We only support expressions that are simple qualified names. For other
+                    // expressions this produces undefined.
+                    if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                        return node.expression;
+                    }
+            }
+            return undefined;
+        }
+        function resolveTypeReferenceName(node, typeReferenceName) {
+            if (!typeReferenceName) {
+                return unknownSymbol;
+            }
+            return resolveEntityName(typeReferenceName, 793056 /* Type */) || unknownSymbol;
+        }
+        function getTypeReferenceType(node, symbol) {
+            if (symbol === unknownSymbol) {
+                return unknownType;
+            }
+            if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                return getTypeFromClassOrInterfaceReference(node, symbol);
+            }
+            if (symbol.flags & 524288 /* TypeAlias */) {
+                return getTypeFromTypeAliasReference(node, symbol);
+            }
+            if (symbol.flags & 107455 /* Value */ && node.kind === 267 /* JSDocTypeReference */) {
+                // A JSDocTypeReference may have resolved to a value (as opposed to a type). In
+                // that case, the type of this reference is just the type of the value we resolved
+                // to.
+                return getTypeOfSymbol(symbol);
+            }
+            return getTypeFromNonGenericTypeReference(node, symbol);
+        }
+        function getTypeFromTypeReference(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var symbol = void 0;
+                var type = void 0;
+                if (node.kind === 267 /* JSDocTypeReference */) {
+                    var typeReferenceName = getTypeReferenceName(node);
+                    symbol = resolveTypeReferenceName(node, typeReferenceName);
+                    type = getTypeReferenceType(node, symbol);
+                    links.resolvedSymbol = symbol;
+                    links.resolvedType = type;
+                }
+                else {
+                    // We only support expressions that are simple qualified names. For other expressions this produces undefined.
+                    var typeNameOrExpression = node.kind === 155 /* TypeReference */ ? node.typeName :
+                        ts.isSupportedExpressionWithTypeArguments(node) ? node.expression :
+                            undefined;
+                    symbol = typeNameOrExpression && resolveEntityName(typeNameOrExpression, 793056 /* Type */) || unknownSymbol;
+                    type = symbol === unknownSymbol ? unknownType :
+                        symbol.flags & (32 /* Class */ | 64 /* Interface */) ? getTypeFromClassOrInterfaceReference(node, symbol) :
+                            symbol.flags & 524288 /* TypeAlias */ ? getTypeFromTypeAliasReference(node, symbol) :
+                                getTypeFromNonGenericTypeReference(node, symbol);
+                }
+                // Cache both the resolved symbol and the resolved type. The resolved symbol is needed in when we check the
+                // type reference in checkTypeReferenceOrExpressionWithTypeArguments.
+                links.resolvedSymbol = symbol;
+                links.resolvedType = type;
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeQueryNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // TypeScript 1.0 spec (April 2014): 3.6.3
+                // The expression is processed as an identifier expression (section 4.3)
+                // or property access expression(section 4.10),
+                // the widened type(section 3.9) of which becomes the result.
+                links.resolvedType = getWidenedType(checkExpression(node.exprName));
+            }
+            return links.resolvedType;
+        }
+        function getTypeOfGlobalSymbol(symbol, arity) {
+            function getTypeDeclaration(symbol) {
+                var declarations = symbol.declarations;
+                for (var _i = 0, declarations_3 = declarations; _i < declarations_3.length; _i++) {
+                    var declaration = declarations_3[_i];
+                    switch (declaration.kind) {
+                        case 221 /* ClassDeclaration */:
+                        case 222 /* InterfaceDeclaration */:
+                        case 224 /* EnumDeclaration */:
+                            return declaration;
+                    }
+                }
+            }
+            if (!symbol) {
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            var type = getDeclaredTypeOfSymbol(symbol);
+            if (!(type.flags & 80896 /* ObjectType */)) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_be_a_class_or_interface_type, symbol.name);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            if ((type.typeParameters ? type.typeParameters.length : 0) !== arity) {
+                error(getTypeDeclaration(symbol), ts.Diagnostics.Global_type_0_must_have_1_type_parameter_s, symbol.name, arity);
+                return arity ? emptyGenericType : emptyObjectType;
+            }
+            return type;
+        }
+        function getGlobalValueSymbol(name) {
+            return getGlobalSymbol(name, 107455 /* Value */, ts.Diagnostics.Cannot_find_global_value_0);
+        }
+        function getGlobalTypeSymbol(name) {
+            return getGlobalSymbol(name, 793056 /* Type */, ts.Diagnostics.Cannot_find_global_type_0);
+        }
+        function getGlobalSymbol(name, meaning, diagnostic) {
+            return resolveName(undefined, name, meaning, diagnostic, name);
+        }
+        function getGlobalType(name, arity) {
+            if (arity === void 0) { arity = 0; }
+            return getTypeOfGlobalSymbol(getGlobalTypeSymbol(name), arity);
+        }
+        /**
+         * Returns a type that is inside a namespace at the global scope, e.g.
+         * getExportedTypeFromNamespace('JSX', 'Element') returns the JSX.Element type
+         */
+        function getExportedTypeFromNamespace(namespace, name) {
+            var namespaceSymbol = getGlobalSymbol(namespace, 1536 /* Namespace */, /*diagnosticMessage*/ undefined);
+            var typeSymbol = namespaceSymbol && getSymbol(namespaceSymbol.exports, name, 793056 /* Type */);
+            return typeSymbol && getDeclaredTypeOfSymbol(typeSymbol);
+        }
+        /**
+          * Creates a TypeReference for a generic `TypedPropertyDescriptor<T>`.
+          */
+        function createTypedPropertyDescriptorType(propertyType) {
+            var globalTypedPropertyDescriptorType = getGlobalTypedPropertyDescriptorType();
+            return globalTypedPropertyDescriptorType !== emptyGenericType
+                ? createTypeReference(globalTypedPropertyDescriptorType, [propertyType])
+                : emptyObjectType;
+        }
+        /**
+         * Instantiates a global type that is generic with some element type, and returns that instantiation.
+         */
+        function createTypeFromGenericGlobalType(genericGlobalType, typeArguments) {
+            return genericGlobalType !== emptyGenericType ? createTypeReference(genericGlobalType, typeArguments) : emptyObjectType;
+        }
+        function createIterableType(elementType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableType(), [elementType]);
+        }
+        function createIterableIteratorType(elementType) {
+            return createTypeFromGenericGlobalType(getGlobalIterableIteratorType(), [elementType]);
+        }
+        function createArrayType(elementType) {
+            return createTypeFromGenericGlobalType(globalArrayType, [elementType]);
+        }
+        function getTypeFromArrayTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createArrayType(getTypeFromTypeNode(node.elementType));
+            }
+            return links.resolvedType;
+        }
+        function createTupleType(elementTypes) {
+            var id = getTypeListId(elementTypes);
+            return tupleTypes[id] || (tupleTypes[id] = createNewTupleType(elementTypes));
+        }
+        function createNewTupleType(elementTypes) {
+            var propagatedFlags = getPropagatingFlagsOfTypes(elementTypes, /*excludeKinds*/ 0);
+            var type = createObjectType(8192 /* Tuple */ | propagatedFlags);
+            type.elementTypes = elementTypes;
+            return type;
+        }
+        function getTypeFromTupleTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = createTupleType(ts.map(node.elementTypes, getTypeFromTypeNode));
+            }
+            return links.resolvedType;
+        }
+        function addTypeToSet(typeSet, type, typeSetKind) {
+            if (type.flags & typeSetKind) {
+                addTypesToSet(typeSet, type.types, typeSetKind);
+            }
+            else if (type.flags & (1 /* Any */ | 32 /* Undefined */ | 64 /* Null */)) {
+                if (type.flags & 1 /* Any */)
+                    typeSet.containsAny = true;
+                if (type.flags & 32 /* Undefined */)
+                    typeSet.containsUndefined = true;
+                if (type.flags & 64 /* Null */)
+                    typeSet.containsNull = true;
+                if (!(type.flags & 2097152 /* ContainsWideningType */))
+                    typeSet.containsNonWideningType = true;
+            }
+            else if (type !== neverType && !ts.contains(typeSet, type)) {
+                typeSet.push(type);
+            }
+        }
+        // Add the given types to the given type set. Order is preserved, duplicates are removed,
+        // and nested types of the given kind are flattened into the set.
+        function addTypesToSet(typeSet, types, typeSetKind) {
+            for (var _i = 0, types_4 = types; _i < types_4.length; _i++) {
+                var type = types_4[_i];
+                addTypeToSet(typeSet, type, typeSetKind);
+            }
+        }
+        function isSubtypeOfAny(candidate, types) {
+            for (var i = 0, len = types.length; i < len; i++) {
+                if (candidate !== types[i] && isTypeSubtypeOf(candidate, types[i])) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function removeSubtypes(types) {
+            var i = types.length;
+            while (i > 0) {
+                i--;
+                if (isSubtypeOfAny(types[i], types)) {
+                    types.splice(i, 1);
+                }
+            }
+        }
+        // We reduce the constituent type set to only include types that aren't subtypes of other types, unless
+        // the noSubtypeReduction flag is specified, in which case we perform a simple deduplication based on
+        // object identity. Subtype reduction is possible only when union types are known not to circularly
+        // reference themselves (as is the case with union types created by expression constructs such as array
+        // literals and the || and ?: operators). Named types can circularly reference themselves and therefore
+        // cannot be deduplicated during their declaration. For example, "type Item = string | (() => Item" is
+        // a named type that circularly references itself.
+        function getUnionType(types, noSubtypeReduction) {
+            if (types.length === 0) {
+                return neverType;
+            }
+            if (types.length === 1) {
+                return types[0];
+            }
+            var typeSet = [];
+            addTypesToSet(typeSet, types, 16384 /* Union */);
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (strictNullChecks) {
+                if (typeSet.containsNull)
+                    typeSet.push(nullType);
+                if (typeSet.containsUndefined)
+                    typeSet.push(undefinedType);
+            }
+            if (!noSubtypeReduction) {
+                removeSubtypes(typeSet);
+            }
+            if (typeSet.length === 0) {
+                return typeSet.containsNull ? typeSet.containsNonWideningType ? nullType : nullWideningType :
+                    typeSet.containsUndefined ? typeSet.containsNonWideningType ? undefinedType : undefinedWideningType :
+                        neverType;
+            }
+            else if (typeSet.length === 1) {
+                return typeSet[0];
+            }
+            var id = getTypeListId(typeSet);
+            var type = unionTypes[id];
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 96 /* Nullable */);
+                type = unionTypes[id] = createObjectType(16384 /* Union */ | propagatedFlags);
+                type.types = typeSet;
+            }
+            return type;
+        }
+        function getTypeFromUnionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getUnionType(ts.map(node.types, getTypeFromTypeNode), /*noSubtypeReduction*/ true);
+            }
+            return links.resolvedType;
+        }
+        // We do not perform structural deduplication on intersection types. Intersection types are created only by the &
+        // type operator and we can't reduce those because we want to support recursive intersection types. For example,
+        // a type alias of the form "type List<T> = T & { next: List<T> }" cannot be reduced during its declaration.
+        // Also, unlike union types, the order of the constituent types is preserved in order that overload resolution
+        // for intersections of types with signatures can be deterministic.
+        function getIntersectionType(types) {
+            if (types.length === 0) {
+                return emptyObjectType;
+            }
+            var typeSet = [];
+            addTypesToSet(typeSet, types, 32768 /* Intersection */);
+            if (typeSet.containsAny) {
+                return anyType;
+            }
+            if (strictNullChecks) {
+                if (typeSet.containsNull)
+                    typeSet.push(nullType);
+                if (typeSet.containsUndefined)
+                    typeSet.push(undefinedType);
+            }
+            if (typeSet.length === 1) {
+                return typeSet[0];
+            }
+            var id = getTypeListId(typeSet);
+            var type = intersectionTypes[id];
+            if (!type) {
+                var propagatedFlags = getPropagatingFlagsOfTypes(typeSet, /*excludeKinds*/ 96 /* Nullable */);
+                type = intersectionTypes[id] = createObjectType(32768 /* Intersection */ | propagatedFlags);
+                type.types = typeSet;
+            }
+            return type;
+        }
+        function getTypeFromIntersectionTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getIntersectionType(ts.map(node.types, getTypeFromTypeNode));
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // Deferred resolution of members is handled by resolveObjectTypeMembers
+                links.resolvedType = createObjectType(65536 /* Anonymous */, node.symbol);
+            }
+            return links.resolvedType;
+        }
+        function getStringLiteralTypeForText(text) {
+            if (ts.hasProperty(stringLiteralTypes, text)) {
+                return stringLiteralTypes[text];
+            }
+            var type = stringLiteralTypes[text] = createType(256 /* StringLiteral */);
+            type.text = text;
+            return type;
+        }
+        function getTypeFromStringLiteralTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getStringLiteralTypeForText(ts.unescapeIdentifier(node.text));
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocVariadicType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var type = getTypeFromTypeNode(node.type);
+                links.resolvedType = type ? createArrayType(type) : unknownType;
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromJSDocTupleType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                var types = ts.map(node.types, getTypeFromTypeNode);
+                links.resolvedType = createTupleType(types);
+            }
+            return links.resolvedType;
+        }
+        function getThisType(node) {
+            var container = ts.getThisContainer(node, /*includeArrowFunctions*/ false);
+            var parent = container && container.parent;
+            if (parent && (ts.isClassLike(parent) || parent.kind === 222 /* InterfaceDeclaration */)) {
+                if (!(container.flags & 32 /* Static */) &&
+                    (container.kind !== 148 /* Constructor */ || ts.isNodeDescendentOf(node, container.body))) {
+                    return getDeclaredTypeOfClassOrInterface(getSymbolOfNode(parent)).thisType;
+                }
+            }
+            error(node, ts.Diagnostics.A_this_type_is_available_only_in_a_non_static_member_of_a_class_or_interface);
+            return unknownType;
+        }
+        function getTypeFromThisTypeNode(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                links.resolvedType = getThisType(node);
+            }
+            return links.resolvedType;
+        }
+        function getTypeFromTypeNode(node) {
+            switch (node.kind) {
+                case 117 /* AnyKeyword */:
+                case 258 /* JSDocAllType */:
+                case 259 /* JSDocUnknownType */:
+                    return anyType;
+                case 132 /* StringKeyword */:
+                    return stringType;
+                case 130 /* NumberKeyword */:
+                    return numberType;
+                case 120 /* BooleanKeyword */:
+                    return booleanType;
+                case 133 /* SymbolKeyword */:
+                    return esSymbolType;
+                case 103 /* VoidKeyword */:
+                    return voidType;
+                case 135 /* UndefinedKeyword */:
+                    return undefinedType;
+                case 93 /* NullKeyword */:
+                    return nullType;
+                case 127 /* NeverKeyword */:
+                    return neverType;
+                case 165 /* ThisType */:
+                case 97 /* ThisKeyword */:
+                    return getTypeFromThisTypeNode(node);
+                case 166 /* StringLiteralType */:
+                    return getTypeFromStringLiteralTypeNode(node);
+                case 155 /* TypeReference */:
+                case 267 /* JSDocTypeReference */:
+                    return getTypeFromTypeReference(node);
+                case 154 /* TypePredicate */:
+                    return booleanType;
+                case 194 /* ExpressionWithTypeArguments */:
+                    return getTypeFromTypeReference(node);
+                case 158 /* TypeQuery */:
+                    return getTypeFromTypeQueryNode(node);
+                case 160 /* ArrayType */:
+                case 260 /* JSDocArrayType */:
+                    return getTypeFromArrayTypeNode(node);
+                case 161 /* TupleType */:
+                    return getTypeFromTupleTypeNode(node);
+                case 162 /* UnionType */:
+                case 261 /* JSDocUnionType */:
+                    return getTypeFromUnionTypeNode(node);
+                case 163 /* IntersectionType */:
+                    return getTypeFromIntersectionTypeNode(node);
+                case 164 /* ParenthesizedType */:
+                case 263 /* JSDocNullableType */:
+                case 264 /* JSDocNonNullableType */:
+                case 271 /* JSDocConstructorType */:
+                case 272 /* JSDocThisType */:
+                case 268 /* JSDocOptionalType */:
+                    return getTypeFromTypeNode(node.type);
+                case 156 /* FunctionType */:
+                case 157 /* ConstructorType */:
+                case 159 /* TypeLiteral */:
+                case 281 /* JSDocTypeLiteral */:
+                case 269 /* JSDocFunctionType */:
+                case 265 /* JSDocRecordType */:
+                    return getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                // This function assumes that an identifier or qualified name is a type expression
+                // Callers should first ensure this by calling isTypeNode
+                case 69 /* Identifier */:
+                case 139 /* QualifiedName */:
+                    var symbol = getSymbolAtLocation(node);
+                    return symbol && getDeclaredTypeOfSymbol(symbol);
+                case 262 /* JSDocTupleType */:
+                    return getTypeFromJSDocTupleType(node);
+                case 270 /* JSDocVariadicType */:
+                    return getTypeFromJSDocVariadicType(node);
+                default:
+                    return unknownType;
+            }
+        }
+        function instantiateList(items, mapper, instantiator) {
+            if (items && items.length) {
+                var result = [];
+                for (var _i = 0, items_1 = items; _i < items_1.length; _i++) {
+                    var v = items_1[_i];
+                    result.push(instantiator(v, mapper));
+                }
+                return result;
+            }
+            return items;
+        }
+        function createUnaryTypeMapper(source, target) {
+            return function (t) { return t === source ? target : t; };
+        }
+        function createBinaryTypeMapper(source1, target1, source2, target2) {
+            return function (t) { return t === source1 ? target1 : t === source2 ? target2 : t; };
+        }
+        function createArrayTypeMapper(sources, targets) {
+            return function (t) {
+                for (var i = 0; i < sources.length; i++) {
+                    if (t === sources[i]) {
+                        return targets ? targets[i] : anyType;
+                    }
+                }
+                return t;
+            };
+        }
+        function createTypeMapper(sources, targets) {
+            var count = sources.length;
+            var mapper = count == 1 ? createUnaryTypeMapper(sources[0], targets ? targets[0] : anyType) :
+                count == 2 ? createBinaryTypeMapper(sources[0], targets ? targets[0] : anyType, sources[1], targets ? targets[1] : anyType) :
+                    createArrayTypeMapper(sources, targets);
+            mapper.mappedTypes = sources;
+            return mapper;
+        }
+        function createTypeEraser(sources) {
+            return createTypeMapper(sources, undefined);
+        }
+        function getInferenceMapper(context) {
+            if (!context.mapper) {
+                var mapper = function (t) {
+                    var typeParameters = context.typeParameters;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (t === typeParameters[i]) {
+                            context.inferences[i].isFixed = true;
+                            return getInferredType(context, i);
+                        }
+                    }
+                    return t;
+                };
+                mapper.mappedTypes = context.typeParameters;
+                mapper.context = context;
+                context.mapper = mapper;
+            }
+            return context.mapper;
+        }
+        function identityMapper(type) {
+            return type;
+        }
+        function combineTypeMappers(mapper1, mapper2) {
+            var mapper = function (t) { return instantiateType(mapper1(t), mapper2); };
+            mapper.mappedTypes = mapper1.mappedTypes;
+            return mapper;
+        }
+        function cloneTypeParameter(typeParameter) {
+            var result = createType(512 /* TypeParameter */);
+            result.symbol = typeParameter.symbol;
+            result.target = typeParameter;
+            return result;
+        }
+        function cloneTypePredicate(predicate, mapper) {
+            if (ts.isIdentifierTypePredicate(predicate)) {
+                return {
+                    kind: 1 /* Identifier */,
+                    parameterName: predicate.parameterName,
+                    parameterIndex: predicate.parameterIndex,
+                    type: instantiateType(predicate.type, mapper)
+                };
+            }
+            else {
+                return {
+                    kind: 0 /* This */,
+                    type: instantiateType(predicate.type, mapper)
+                };
+            }
+        }
+        function instantiateSignature(signature, mapper, eraseTypeParameters) {
+            var freshTypeParameters;
+            var freshTypePredicate;
+            if (signature.typeParameters && !eraseTypeParameters) {
+                // First create a fresh set of type parameters, then include a mapping from the old to the
+                // new type parameters in the mapper function. Finally store this mapper in the new type
+                // parameters such that we can use it when instantiating constraints.
+                freshTypeParameters = ts.map(signature.typeParameters, cloneTypeParameter);
+                mapper = combineTypeMappers(createTypeMapper(signature.typeParameters, freshTypeParameters), mapper);
+                for (var _i = 0, freshTypeParameters_1 = freshTypeParameters; _i < freshTypeParameters_1.length; _i++) {
+                    var tp = freshTypeParameters_1[_i];
+                    tp.mapper = mapper;
+                }
+            }
+            if (signature.typePredicate) {
+                freshTypePredicate = cloneTypePredicate(signature.typePredicate, mapper);
+            }
+            var result = createSignature(signature.declaration, freshTypeParameters, signature.thisType && instantiateType(signature.thisType, mapper), instantiateList(signature.parameters, mapper, instantiateSymbol), instantiateType(signature.resolvedReturnType, mapper), freshTypePredicate, signature.minArgumentCount, signature.hasRestParameter, signature.hasStringLiterals);
+            result.target = signature;
+            result.mapper = mapper;
+            return result;
+        }
+        function instantiateSymbol(symbol, mapper) {
+            if (symbol.flags & 16777216 /* Instantiated */) {
+                var links = getSymbolLinks(symbol);
+                // If symbol being instantiated is itself a instantiation, fetch the original target and combine the
+                // type mappers. This ensures that original type identities are properly preserved and that aliases
+                // always reference a non-aliases.
+                symbol = links.target;
+                mapper = combineTypeMappers(links.mapper, mapper);
+            }
+            // Keep the flags from the symbol we're instantiating.  Mark that is instantiated, and
+            // also transient so that we can just store data on it directly.
+            var result = createSymbol(16777216 /* Instantiated */ | 67108864 /* Transient */ | symbol.flags, symbol.name);
+            result.declarations = symbol.declarations;
+            result.parent = symbol.parent;
+            result.target = symbol;
+            result.mapper = mapper;
+            if (symbol.valueDeclaration) {
+                result.valueDeclaration = symbol.valueDeclaration;
+            }
+            return result;
+        }
+        function instantiateAnonymousType(type, mapper) {
+            if (mapper.instantiations) {
+                var cachedType = mapper.instantiations[type.id];
+                if (cachedType) {
+                    return cachedType;
+                }
+            }
+            else {
+                mapper.instantiations = [];
+            }
+            // Mark the anonymous type as instantiated such that our infinite instantiation detection logic can recognize it
+            var result = createObjectType(65536 /* Anonymous */ | 131072 /* Instantiated */, type.symbol);
+            result.target = type;
+            result.mapper = mapper;
+            mapper.instantiations[type.id] = result;
+            return result;
+        }
+        function isSymbolInScopeOfMappedTypeParameter(symbol, mapper) {
+            var mappedTypes = mapper.mappedTypes;
+            // Starting with the parent of the symbol's declaration, check if the mapper maps any of
+            // the type parameters introduced by enclosing declarations. We just pick the first
+            // declaration since multiple declarations will all have the same parent anyway.
+            var node = symbol.declarations[0].parent;
+            while (node) {
+                switch (node.kind) {
+                    case 156 /* FunctionType */:
+                    case 157 /* ConstructorType */:
+                    case 220 /* FunctionDeclaration */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 148 /* Constructor */:
+                    case 151 /* CallSignature */:
+                    case 152 /* ConstructSignature */:
+                    case 153 /* IndexSignature */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 223 /* TypeAliasDeclaration */:
+                        var declaration = node;
+                        if (declaration.typeParameters) {
+                            for (var _i = 0, _a = declaration.typeParameters; _i < _a.length; _i++) {
+                                var d = _a[_i];
+                                if (ts.contains(mappedTypes, getDeclaredTypeOfTypeParameter(getSymbolOfNode(d)))) {
+                                    return true;
+                                }
+                            }
+                        }
+                        if (ts.isClassLike(node) || node.kind === 222 /* InterfaceDeclaration */) {
+                            var thisType = getDeclaredTypeOfClassOrInterface(getSymbolOfNode(node)).thisType;
+                            if (thisType && ts.contains(mappedTypes, thisType)) {
+                                return true;
+                            }
+                        }
+                        break;
+                    case 225 /* ModuleDeclaration */:
+                    case 256 /* SourceFile */:
+                        return false;
+                }
+                node = node.parent;
+            }
+            return false;
+        }
+        function instantiateType(type, mapper) {
+            if (type && mapper !== identityMapper) {
+                if (type.flags & 512 /* TypeParameter */) {
+                    return mapper(type);
+                }
+                if (type.flags & 65536 /* Anonymous */) {
+                    // If the anonymous type originates in a declaration of a function, method, class, or
+                    // interface, in an object type literal, or in an object literal expression, we may need
+                    // to instantiate the type because it might reference a type parameter. We skip instantiation
+                    // if none of the type parameters that are in scope in the type's declaration are mapped by
+                    // the given mapper, however we can only do that analysis if the type isn't itself an
+                    // instantiation.
+                    return type.symbol &&
+                        type.symbol.flags & (16 /* Function */ | 8192 /* Method */ | 32 /* Class */ | 2048 /* TypeLiteral */ | 4096 /* ObjectLiteral */) &&
+                        (type.flags & 131072 /* Instantiated */ || isSymbolInScopeOfMappedTypeParameter(type.symbol, mapper)) ?
+                        instantiateAnonymousType(type, mapper) : type;
+                }
+                if (type.flags & 4096 /* Reference */) {
+                    return createTypeReference(type.target, instantiateList(type.typeArguments, mapper, instantiateType));
+                }
+                if (type.flags & 8192 /* Tuple */) {
+                    return createTupleType(instantiateList(type.elementTypes, mapper, instantiateType));
+                }
+                if (type.flags & 16384 /* Union */) {
+                    return getUnionType(instantiateList(type.types, mapper, instantiateType), /*noSubtypeReduction*/ true);
+                }
+                if (type.flags & 32768 /* Intersection */) {
+                    return getIntersectionType(instantiateList(type.types, mapper, instantiateType));
+                }
+            }
+            return type;
+        }
+        function instantiateIndexInfo(info, mapper) {
+            return info && createIndexInfo(instantiateType(info.type, mapper), info.isReadonly, info.declaration);
+        }
+        // Returns true if the given expression contains (at any level of nesting) a function or arrow expression
+        // that is subject to contextual typing.
+        function isContextSensitive(node) {
+            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            switch (node.kind) {
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 171 /* ObjectLiteralExpression */:
+                    return ts.forEach(node.properties, isContextSensitive);
+                case 170 /* ArrayLiteralExpression */:
+                    return ts.forEach(node.elements, isContextSensitive);
+                case 188 /* ConditionalExpression */:
+                    return isContextSensitive(node.whenTrue) ||
+                        isContextSensitive(node.whenFalse);
+                case 187 /* BinaryExpression */:
+                    return node.operatorToken.kind === 52 /* BarBarToken */ &&
+                        (isContextSensitive(node.left) || isContextSensitive(node.right));
+                case 253 /* PropertyAssignment */:
+                    return isContextSensitive(node.initializer);
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                    return isContextSensitiveFunctionLikeDeclaration(node);
+                case 178 /* ParenthesizedExpression */:
+                    return isContextSensitive(node.expression);
+            }
+            return false;
+        }
+        function isContextSensitiveFunctionLikeDeclaration(node) {
+            var areAllParametersUntyped = !ts.forEach(node.parameters, function (p) { return p.type; });
+            var isNullaryArrow = node.kind === 180 /* ArrowFunction */ && !node.parameters.length;
+            return !node.typeParameters && areAllParametersUntyped && !isNullaryArrow;
+        }
+        function isContextSensitiveFunctionOrObjectLiteralMethod(func) {
+            return (isFunctionExpressionOrArrowFunction(func) || ts.isObjectLiteralMethod(func)) && isContextSensitiveFunctionLikeDeclaration(func);
+        }
+        function getTypeWithoutSignatures(type) {
+            if (type.flags & 80896 /* ObjectType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.constructSignatures.length) {
+                    var result = createObjectType(65536 /* Anonymous */, type.symbol);
+                    result.members = resolved.members;
+                    result.properties = resolved.properties;
+                    result.callSignatures = emptyArray;
+                    result.constructSignatures = emptyArray;
+                    type = result;
+                }
+            }
+            return type;
+        }
+        // TYPE CHECKING
+        function isTypeIdenticalTo(source, target) {
+            return checkTypeRelatedTo(source, target, identityRelation, /*errorNode*/ undefined);
+        }
+        function compareTypesIdentical(source, target) {
+            return checkTypeRelatedTo(source, target, identityRelation, /*errorNode*/ undefined) ? -1 /* True */ : 0 /* False */;
+        }
+        function compareTypesAssignable(source, target) {
+            return checkTypeRelatedTo(source, target, assignableRelation, /*errorNode*/ undefined) ? -1 /* True */ : 0 /* False */;
+        }
+        function isTypeSubtypeOf(source, target) {
+            return checkTypeSubtypeOf(source, target, /*errorNode*/ undefined);
+        }
+        function isTypeAssignableTo(source, target) {
+            return checkTypeAssignableTo(source, target, /*errorNode*/ undefined);
+        }
+        /**
+         * This is *not* a bi-directional relationship.
+         * If one needs to check both directions for comparability, use a second call to this function or 'checkTypeComparableTo'.
+         */
+        function isTypeComparableTo(source, target) {
+            return checkTypeComparableTo(source, target, /*errorNode*/ undefined);
+        }
+        function checkTypeSubtypeOf(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function checkTypeAssignableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, assignableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        /**
+         * This is *not* a bi-directional relationship.
+         * If one needs to check both directions for comparability, use a second call to this function or 'isTypeComparableTo'.
+         */
+        function checkTypeComparableTo(source, target, errorNode, headMessage, containingMessageChain) {
+            return checkTypeRelatedTo(source, target, comparableRelation, errorNode, headMessage, containingMessageChain);
+        }
+        function isSignatureAssignableTo(source, target, ignoreReturnTypes) {
+            return compareSignaturesRelated(source, target, ignoreReturnTypes, /*reportErrors*/ false, /*errorReporter*/ undefined, compareTypesAssignable) !== 0 /* False */;
+        }
+        /**
+         * See signatureRelatedTo, compareSignaturesIdentical
+         */
+        function compareSignaturesRelated(source, target, ignoreReturnTypes, reportErrors, errorReporter, compareTypes) {
+            // TODO (drosen): De-duplicate code between related functions.
+            if (source === target) {
+                return -1 /* True */;
+            }
+            if (!target.hasRestParameter && source.minArgumentCount > target.parameters.length) {
+                return 0 /* False */;
+            }
+            // Spec 1.0 Section 3.8.3 & 3.8.4:
+            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
+            source = getErasedSignature(source);
+            target = getErasedSignature(target);
+            var result = -1 /* True */;
+            if (source.thisType && target.thisType && source.thisType !== voidType) {
+                // void sources are assignable to anything.
+                var related = compareTypes(source.thisType, target.thisType, /*reportErrors*/ false)
+                    || compareTypes(target.thisType, source.thisType, reportErrors);
+                if (!related) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.The_this_types_of_each_signature_are_incompatible);
+                    }
+                    return 0 /* False */;
+                }
+                result &= related;
+            }
+            var sourceMax = getNumNonRestParameters(source);
+            var targetMax = getNumNonRestParameters(target);
+            var checkCount = getNumParametersToCheckForSignatureRelatability(source, sourceMax, target, targetMax);
+            var sourceParams = source.parameters;
+            var targetParams = target.parameters;
+            for (var i = 0; i < checkCount; i++) {
+                var s = i < sourceMax ? getTypeOfParameter(sourceParams[i]) : getRestTypeOfSignature(source);
+                var t = i < targetMax ? getTypeOfParameter(targetParams[i]) : getRestTypeOfSignature(target);
+                var related = compareTypes(s, t, /*reportErrors*/ false) || compareTypes(t, s, reportErrors);
+                if (!related) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Types_of_parameters_0_and_1_are_incompatible, sourceParams[i < sourceMax ? i : sourceMax].name, targetParams[i < targetMax ? i : targetMax].name);
+                    }
+                    return 0 /* False */;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                var targetReturnType = getReturnTypeOfSignature(target);
+                if (targetReturnType === voidType) {
+                    return result;
+                }
+                var sourceReturnType = getReturnTypeOfSignature(source);
+                // The following block preserves behavior forbidding boolean returning functions from being assignable to type guard returning functions
+                if (target.typePredicate) {
+                    if (source.typePredicate) {
+                        result &= compareTypePredicateRelatedTo(source.typePredicate, target.typePredicate, reportErrors, errorReporter, compareTypes);
+                    }
+                    else if (ts.isIdentifierTypePredicate(target.typePredicate)) {
+                        if (reportErrors) {
+                            errorReporter(ts.Diagnostics.Signature_0_must_have_a_type_predicate, signatureToString(source));
+                        }
+                        return 0 /* False */;
+                    }
+                }
+                else {
+                    result &= compareTypes(sourceReturnType, targetReturnType, reportErrors);
+                }
+            }
+            return result;
+        }
+        function compareTypePredicateRelatedTo(source, target, reportErrors, errorReporter, compareTypes) {
+            if (source.kind !== target.kind) {
+                if (reportErrors) {
+                    errorReporter(ts.Diagnostics.A_this_based_type_guard_is_not_compatible_with_a_parameter_based_type_guard);
+                    errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                }
+                return 0 /* False */;
+            }
+            if (source.kind === 1 /* Identifier */) {
+                var sourceIdentifierPredicate = source;
+                var targetIdentifierPredicate = target;
+                if (sourceIdentifierPredicate.parameterIndex !== targetIdentifierPredicate.parameterIndex) {
+                    if (reportErrors) {
+                        errorReporter(ts.Diagnostics.Parameter_0_is_not_in_the_same_position_as_parameter_1, sourceIdentifierPredicate.parameterName, targetIdentifierPredicate.parameterName);
+                        errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+                    }
+                    return 0 /* False */;
+                }
+            }
+            var related = compareTypes(source.type, target.type, reportErrors);
+            if (related === 0 /* False */ && reportErrors) {
+                errorReporter(ts.Diagnostics.Type_predicate_0_is_not_assignable_to_1, typePredicateToString(source), typePredicateToString(target));
+            }
+            return related;
+        }
+        function isImplementationCompatibleWithOverload(implementation, overload) {
+            var erasedSource = getErasedSignature(implementation);
+            var erasedTarget = getErasedSignature(overload);
+            // First see if the return types are compatible in either direction.
+            var sourceReturnType = getReturnTypeOfSignature(erasedSource);
+            var targetReturnType = getReturnTypeOfSignature(erasedTarget);
+            if (targetReturnType === voidType
+                || checkTypeRelatedTo(targetReturnType, sourceReturnType, assignableRelation, /*errorNode*/ undefined)
+                || checkTypeRelatedTo(sourceReturnType, targetReturnType, assignableRelation, /*errorNode*/ undefined)) {
+                return isSignatureAssignableTo(erasedSource, erasedTarget, /*ignoreReturnTypes*/ true);
+            }
+            return false;
+        }
+        function getNumNonRestParameters(signature) {
+            var numParams = signature.parameters.length;
+            return signature.hasRestParameter ?
+                numParams - 1 :
+                numParams;
+        }
+        function getNumParametersToCheckForSignatureRelatability(source, sourceNonRestParamCount, target, targetNonRestParamCount) {
+            if (source.hasRestParameter === target.hasRestParameter) {
+                if (source.hasRestParameter) {
+                    // If both have rest parameters, get the max and add 1 to
+                    // compensate for the rest parameter.
+                    return Math.max(sourceNonRestParamCount, targetNonRestParamCount) + 1;
+                }
+                else {
+                    return Math.min(sourceNonRestParamCount, targetNonRestParamCount);
+                }
+            }
+            else {
+                // Return the count for whichever signature doesn't have rest parameters.
+                return source.hasRestParameter ?
+                    targetNonRestParamCount :
+                    sourceNonRestParamCount;
+            }
+        }
+        /**
+         * Checks if 'source' is related to 'target' (e.g.: is a assignable to).
+         * @param source The left-hand-side of the relation.
+         * @param target The right-hand-side of the relation.
+         * @param relation The relation considered. One of 'identityRelation', 'subtypeRelation', 'assignableRelation', or 'comparableRelation'.
+         * Used as both to determine which checks are performed and as a cache of previously computed results.
+         * @param errorNode The suggested node upon which all errors will be reported, if defined. This may or may not be the actual node used.
+         * @param headMessage If the error chain should be prepended by a head message, then headMessage will be used.
+         * @param containingMessageChain A chain of errors to prepend any new errors found.
+         */
+        function checkTypeRelatedTo(source, target, relation, errorNode, headMessage, containingMessageChain) {
+            var errorInfo;
+            var sourceStack;
+            var targetStack;
+            var maybeStack;
+            var expandingFlags;
+            var depth = 0;
+            var overflow = false;
+            ts.Debug.assert(relation !== identityRelation || !errorNode, "no error reporting in identity checking");
+            var result = isRelatedTo(source, target, /*reportErrors*/ !!errorNode, headMessage);
+            if (overflow) {
+                error(errorNode, ts.Diagnostics.Excessive_stack_depth_comparing_types_0_and_1, typeToString(source), typeToString(target));
+            }
+            else if (errorInfo) {
+                if (containingMessageChain) {
+                    errorInfo = ts.concatenateDiagnosticMessageChains(containingMessageChain, errorInfo);
+                }
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(errorNode, errorInfo));
+            }
+            return result !== 0 /* False */;
+            function reportError(message, arg0, arg1, arg2) {
+                ts.Debug.assert(!!errorNode);
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+            }
+            function reportRelationError(message, source, target) {
+                var sourceType = typeToString(source);
+                var targetType = typeToString(target);
+                if (sourceType === targetType) {
+                    sourceType = typeToString(source, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */);
+                    targetType = typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */);
+                }
+                if (!message) {
+                    message = relation === comparableRelation ?
+                        ts.Diagnostics.Type_0_is_not_comparable_to_type_1 :
+                        ts.Diagnostics.Type_0_is_not_assignable_to_type_1;
+                }
+                reportError(message, sourceType, targetType);
+            }
+            // Compare two types and return
+            // Ternary.True if they are related with no assumptions,
+            // Ternary.Maybe if they are related with assumptions of other relationships, or
+            // Ternary.False if they are not related.
+            function isRelatedTo(source, target, reportErrors, headMessage) {
+                var result;
+                // both types are the same - covers 'they are the same primitive type or both are Any' or the same type parameter cases
+                if (source === target)
+                    return -1 /* True */;
+                if (relation === identityRelation) {
+                    return isIdenticalTo(source, target);
+                }
+                if (!(target.flags & 134217728 /* Never */)) {
+                    if (target.flags & 1 /* Any */ || source.flags & 134217728 /* Never */)
+                        return -1 /* True */;
+                    if (source.flags & 32 /* Undefined */) {
+                        if (!strictNullChecks || target.flags & (32 /* Undefined */ | 16 /* Void */))
+                            return -1 /* True */;
+                    }
+                    if (source.flags & 64 /* Null */) {
+                        if (!strictNullChecks || target.flags & 64 /* Null */)
+                            return -1 /* True */;
+                    }
+                    if (source.flags & 128 /* Enum */ && target === numberType)
+                        return -1 /* True */;
+                    if (source.flags & 128 /* Enum */ && target.flags & 128 /* Enum */) {
+                        if (result = enumRelatedTo(source, target, reportErrors)) {
+                            return result;
+                        }
+                    }
+                    if (source.flags & 256 /* StringLiteral */ && target === stringType)
+                        return -1 /* True */;
+                    if (relation === assignableRelation || relation === comparableRelation) {
+                        if (source.flags & 1 /* Any */)
+                            return -1 /* True */;
+                        if (source === numberType && target.flags & 128 /* Enum */)
+                            return -1 /* True */;
+                    }
+                    if (source.flags & 8 /* Boolean */ && target.flags & 8 /* Boolean */) {
+                        return -1 /* True */;
+                    }
+                }
+                if (source.flags & 1048576 /* FreshObjectLiteral */) {
+                    if (hasExcessProperties(source, target, reportErrors)) {
+                        if (reportErrors) {
+                            reportRelationError(headMessage, source, target);
+                        }
+                        return 0 /* False */;
+                    }
+                    // Above we check for excess properties with respect to the entire target type. When union
+                    // and intersection types are further deconstructed on the target side, we don't want to
+                    // make the check again (as it might fail for a partial target type). Therefore we obtain
+                    // the regular source type and proceed with that.
+                    if (target.flags & 49152 /* UnionOrIntersection */) {
+                        source = getRegularTypeOfObjectLiteral(source);
+                    }
+                }
+                var saveErrorInfo = errorInfo;
+                // Note that these checks are specifically ordered to produce correct results.
+                if (source.flags & 16384 /* Union */) {
+                    if (relation === comparableRelation) {
+                        result = someTypeRelatedToType(source, target, reportErrors);
+                    }
+                    else {
+                        result = eachTypeRelatedToType(source, target, reportErrors);
+                    }
+                    if (result) {
+                        return result;
+                    }
+                }
+                else if (target.flags & 32768 /* Intersection */) {
+                    result = typeRelatedToEachType(source, target, reportErrors);
+                    if (result) {
+                        return result;
+                    }
+                }
+                else {
+                    // It is necessary to try these "some" checks on both sides because there may be nested "each" checks
+                    // on either side that need to be prioritized. For example, A | B = (A | B) & (C | D) or
+                    // A & B = (A & B) | (C & D).
+                    if (source.flags & 32768 /* Intersection */) {
+                        // Check to see if any constituents of the intersection are immediately related to the target.
+                        //
+                        // Don't report errors though. Checking whether a constituent is related to the source is not actually
+                        // useful and leads to some confusing error messages. Instead it is better to let the below checks
+                        // take care of this, or to not elaborate at all. For instance,
+                        //
+                        //    - For an object type (such as 'C = A & B'), users are usually more interested in structural errors.
+                        //
+                        //    - For a union type (such as '(A | B) = (C & D)'), it's better to hold onto the whole intersection
+                        //          than to report that 'D' is not assignable to 'A' or 'B'.
+                        //
+                        //    - For a primitive type or type parameter (such as 'number = A & B') there is no point in
+                        //          breaking the intersection apart.
+                        if (result = someTypeRelatedToType(source, target, /*reportErrors*/ false)) {
+                            return result;
+                        }
+                    }
+                    if (target.flags & 16384 /* Union */) {
+                        if (result = typeRelatedToSomeType(source, target, reportErrors && !(source.flags & 16777726 /* Primitive */))) {
+                            return result;
+                        }
+                    }
+                }
+                if (source.flags & 512 /* TypeParameter */) {
+                    var constraint = getConstraintOfTypeParameter(source);
+                    if (!constraint || constraint.flags & 1 /* Any */) {
+                        constraint = emptyObjectType;
+                    }
+                    // The constraint may need to be further instantiated with its 'this' type.
+                    constraint = getTypeWithThisArgument(constraint, source);
+                    // Report constraint errors only if the constraint is not the empty object type
+                    var reportConstraintErrors = reportErrors && constraint !== emptyObjectType;
+                    if (result = isRelatedTo(constraint, target, reportConstraintErrors)) {
+                        errorInfo = saveErrorInfo;
+                        return result;
+                    }
+                }
+                else {
+                    if (source.flags & 4096 /* Reference */ && target.flags & 4096 /* Reference */ && source.target === target.target) {
+                        // We have type references to same target type, see if relationship holds for all type arguments
+                        if (result = typeArgumentsRelatedTo(source, target, reportErrors)) {
+                            return result;
+                        }
+                    }
+                    // Even if relationship doesn't hold for unions, intersections, or generic type references,
+                    // it may hold in a structural comparison.
+                    var apparentSource = getApparentType(source);
+                    // In a check of the form X = A & B, we will have previously checked if A relates to X or B relates
+                    // to X. Failing both of those we want to check if the aggregation of A and B's members structurally
+                    // relates to X. Thus, we include intersection types on the source side here.
+                    if (apparentSource.flags & (80896 /* ObjectType */ | 32768 /* Intersection */) && target.flags & 80896 /* ObjectType */) {
+                        // Report structural errors only if we haven't reported any errors yet
+                        var reportStructuralErrors = reportErrors && errorInfo === saveErrorInfo && !(source.flags & 16777726 /* Primitive */);
+                        if (result = objectTypeRelatedTo(apparentSource, source, target, reportStructuralErrors)) {
+                            errorInfo = saveErrorInfo;
+                            return result;
+                        }
+                    }
+                }
+                if (reportErrors) {
+                    reportRelationError(headMessage, source, target);
+                }
+                return 0 /* False */;
+            }
+            function isIdenticalTo(source, target) {
+                var result;
+                if (source.flags & 80896 /* ObjectType */ && target.flags & 80896 /* ObjectType */) {
+                    if (source.flags & 4096 /* Reference */ && target.flags & 4096 /* Reference */ && source.target === target.target) {
+                        // We have type references to same target type, see if all type arguments are identical
+                        if (result = typeArgumentsRelatedTo(source, target, /*reportErrors*/ false)) {
+                            return result;
+                        }
+                    }
+                    return objectTypeRelatedTo(source, source, target, /*reportErrors*/ false);
+                }
+                if (source.flags & 16384 /* Union */ && target.flags & 16384 /* Union */ ||
+                    source.flags & 32768 /* Intersection */ && target.flags & 32768 /* Intersection */) {
+                    if (result = eachTypeRelatedToSomeType(source, target, /*reportErrors*/ false)) {
+                        if (result &= eachTypeRelatedToSomeType(target, source, /*reportErrors*/ false)) {
+                            return result;
+                        }
+                    }
+                }
+                return 0 /* False */;
+            }
+            // Check if a property with the given name is known anywhere in the given type. In an object type, a property
+            // is considered known if the object type is empty and the check is for assignability, if the object type has
+            // index signatures, or if the property is actually declared in the object type. In a union or intersection
+            // type, a property is considered known if it is known in any constituent type.
+            function isKnownProperty(type, name) {
+                if (type.flags & 80896 /* ObjectType */) {
+                    var resolved = resolveStructuredTypeMembers(type);
+                    if ((relation === assignableRelation || relation === comparableRelation) && (type === globalObjectType || isEmptyObjectType(resolved)) ||
+                        resolved.stringIndexInfo ||
+                        (resolved.numberIndexInfo && isNumericLiteralName(name)) ||
+                        getPropertyOfType(type, name)) {
+                        return true;
+                    }
+                }
+                else if (type.flags & 49152 /* UnionOrIntersection */) {
+                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                        var t = _a[_i];
+                        if (isKnownProperty(t, name)) {
+                            return true;
+                        }
+                    }
+                }
+                return false;
+            }
+            function isEmptyObjectType(t) {
+                return t.properties.length === 0 &&
+                    t.callSignatures.length === 0 &&
+                    t.constructSignatures.length === 0 &&
+                    !t.stringIndexInfo &&
+                    !t.numberIndexInfo;
+            }
+            function hasExcessProperties(source, target, reportErrors) {
+                if (!(target.flags & 67108864 /* ObjectLiteralPatternWithComputedProperties */) && maybeTypeOfKind(target, 80896 /* ObjectType */)) {
+                    for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                        var prop = _a[_i];
+                        if (!isKnownProperty(target, prop.name)) {
+                            if (reportErrors) {
+                                // We know *exactly* where things went wrong when comparing the types.
+                                // Use this property as the error node as this will be more helpful in
+                                // reasoning about what went wrong.
+                                ts.Debug.assert(!!errorNode);
+                                errorNode = prop.valueDeclaration;
+                                reportError(ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(prop), typeToString(target));
+                            }
+                            return true;
+                        }
+                    }
+                }
+                return false;
+            }
+            function eachTypeRelatedToSomeType(source, target, reportErrors) {
+                var result = -1 /* True */;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_1 = sourceTypes; _i < sourceTypes_1.length; _i++) {
+                    var sourceType = sourceTypes_1[_i];
+                    var related = typeRelatedToSomeType(sourceType, target, /*reportErrors*/ false);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeRelatedToSomeType(source, target, reportErrors) {
+                var targetTypes = target.types;
+                var len = targetTypes.length;
+                // The null and undefined types are guaranteed to be at the end of the constituent type list. In order
+                // to produce the best possible errors we first check the nullable types, such that the last type we
+                // check and report errors from is a non-nullable type if one is present.
+                while (len >= 2 && targetTypes[len - 1].flags & 96 /* Nullable */) {
+                    var related = isRelatedTo(source, targetTypes[len - 1], /*reportErrors*/ false);
+                    if (related) {
+                        return related;
+                    }
+                    len--;
+                }
+                // Now check the non-nullable types and report errors on the last one.
+                for (var i = 0; i < len; i++) {
+                    var related = isRelatedTo(source, targetTypes[i], reportErrors && i === len - 1);
+                    if (related) {
+                        return related;
+                    }
+                }
+                return 0 /* False */;
+            }
+            function typeRelatedToEachType(source, target, reportErrors) {
+                var result = -1 /* True */;
+                var targetTypes = target.types;
+                for (var _i = 0, targetTypes_1 = targetTypes; _i < targetTypes_1.length; _i++) {
+                    var targetType = targetTypes_1[_i];
+                    var related = isRelatedTo(source, targetType, reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function someTypeRelatedToType(source, target, reportErrors) {
+                var sourceTypes = source.types;
+                var len = sourceTypes.length;
+                // The null and undefined types are guaranteed to be at the end of the constituent type list. In order
+                // to produce the best possible errors we first check the nullable types, such that the last type we
+                // check and report errors from is a non-nullable type if one is present.
+                while (len >= 2 && sourceTypes[len - 1].flags & 96 /* Nullable */) {
+                    var related = isRelatedTo(sourceTypes[len - 1], target, /*reportErrors*/ false);
+                    if (related) {
+                        return related;
+                    }
+                    len--;
+                }
+                // Now check the non-nullable types and report errors on the last one.
+                for (var i = 0; i < len; i++) {
+                    var related = isRelatedTo(sourceTypes[i], target, reportErrors && i === len - 1);
+                    if (related) {
+                        return related;
+                    }
+                }
+                return 0 /* False */;
+            }
+            function eachTypeRelatedToType(source, target, reportErrors) {
+                var result = -1 /* True */;
+                var sourceTypes = source.types;
+                for (var _i = 0, sourceTypes_2 = sourceTypes; _i < sourceTypes_2.length; _i++) {
+                    var sourceType = sourceTypes_2[_i];
+                    var related = isRelatedTo(sourceType, target, reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function typeArgumentsRelatedTo(source, target, reportErrors) {
+                var sources = source.typeArguments || emptyArray;
+                var targets = target.typeArguments || emptyArray;
+                if (sources.length !== targets.length && relation === identityRelation) {
+                    return 0 /* False */;
+                }
+                var length = sources.length <= targets.length ? sources.length : targets.length;
+                var result = -1 /* True */;
+                for (var i = 0; i < length; i++) {
+                    var related = isRelatedTo(sources[i], targets[i], reportErrors);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            // Determine if two object types are related by structure. First, check if the result is already available in the global cache.
+            // Second, check if we have already started a comparison of the given two types in which case we assume the result to be true.
+            // Third, check if both types are part of deeply nested chains of generic type instantiations and if so assume the types are
+            // equal and infinitely expanding. Fourth, if we have reached a depth of 100 nested comparisons, assume we have runaway recursion
+            // and issue an error. Otherwise, actually compare the structure of the two types.
+            function objectTypeRelatedTo(source, originalSource, target, reportErrors) {
+                if (overflow) {
+                    return 0 /* False */;
+                }
+                var id = relation !== identityRelation || source.id < target.id ? source.id + "," + target.id : target.id + "," + source.id;
+                var related = relation[id];
+                if (related !== undefined) {
+                    if (reportErrors && related === 2 /* Failed */) {
+                        // We are elaborating errors and the cached result is an unreported failure. Record the result as a reported
+                        // failure and continue computing the relation such that errors get reported.
+                        relation[id] = 3 /* FailedAndReported */;
+                    }
+                    else {
+                        return related === 1 /* Succeeded */ ? -1 /* True */ : 0 /* False */;
+                    }
+                }
+                if (depth > 0) {
+                    for (var i = 0; i < depth; i++) {
+                        // If source and target are already being compared, consider them related with assumptions
+                        if (maybeStack[i][id]) {
+                            return 1 /* Maybe */;
+                        }
+                    }
+                    if (depth === 100) {
+                        overflow = true;
+                        return 0 /* False */;
+                    }
+                }
+                else {
+                    sourceStack = [];
+                    targetStack = [];
+                    maybeStack = [];
+                    expandingFlags = 0;
+                }
+                sourceStack[depth] = source;
+                targetStack[depth] = target;
+                maybeStack[depth] = {};
+                maybeStack[depth][id] = 1 /* Succeeded */;
+                depth++;
+                var saveExpandingFlags = expandingFlags;
+                if (!(expandingFlags & 1) && isDeeplyNestedGeneric(source, sourceStack, depth))
+                    expandingFlags |= 1;
+                if (!(expandingFlags & 2) && isDeeplyNestedGeneric(target, targetStack, depth))
+                    expandingFlags |= 2;
+                var result;
+                if (expandingFlags === 3) {
+                    result = 1 /* Maybe */;
+                }
+                else {
+                    result = propertiesRelatedTo(source, target, reportErrors);
+                    if (result) {
+                        result &= signaturesRelatedTo(source, target, 0 /* Call */, reportErrors);
+                        if (result) {
+                            result &= signaturesRelatedTo(source, target, 1 /* Construct */, reportErrors);
+                            if (result) {
+                                result &= indexTypesRelatedTo(source, originalSource, target, 0 /* String */, reportErrors);
+                                if (result) {
+                                    result &= indexTypesRelatedTo(source, originalSource, target, 1 /* Number */, reportErrors);
+                                }
+                            }
+                        }
+                    }
+                }
+                expandingFlags = saveExpandingFlags;
+                depth--;
+                if (result) {
+                    var maybeCache = maybeStack[depth];
+                    // If result is definitely true, copy assumptions to global cache, else copy to next level up
+                    var destinationCache = (result === -1 /* True */ || depth === 0) ? relation : maybeStack[depth - 1];
+                    ts.copyMap(maybeCache, destinationCache);
+                }
+                else {
+                    // A false result goes straight into global cache (when something is false under assumptions it
+                    // will also be false without assumptions)
+                    relation[id] = reportErrors ? 3 /* FailedAndReported */ : 2 /* Failed */;
+                }
+                return result;
+            }
+            function propertiesRelatedTo(source, target, reportErrors) {
+                if (relation === identityRelation) {
+                    return propertiesIdenticalTo(source, target);
+                }
+                var result = -1 /* True */;
+                var properties = getPropertiesOfObjectType(target);
+                var requireOptionalProperties = relation === subtypeRelation && !(source.flags & 524288 /* ObjectLiteral */);
+                for (var _i = 0, properties_1 = properties; _i < properties_1.length; _i++) {
+                    var targetProp = properties_1[_i];
+                    var sourceProp = getPropertyOfType(source, targetProp.name);
+                    if (sourceProp !== targetProp) {
+                        if (!sourceProp) {
+                            if (!(targetProp.flags & 536870912 /* Optional */) || requireOptionalProperties) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, symbolToString(targetProp), typeToString(source));
+                                }
+                                return 0 /* False */;
+                            }
+                        }
+                        else if (!(targetProp.flags & 134217728 /* Prototype */)) {
+                            var sourcePropFlags = getDeclarationFlagsFromSymbol(sourceProp);
+                            var targetPropFlags = getDeclarationFlagsFromSymbol(targetProp);
+                            if (sourcePropFlags & 8 /* Private */ || targetPropFlags & 8 /* Private */) {
+                                if (sourceProp.valueDeclaration !== targetProp.valueDeclaration) {
+                                    if (reportErrors) {
+                                        if (sourcePropFlags & 8 /* Private */ && targetPropFlags & 8 /* Private */) {
+                                            reportError(ts.Diagnostics.Types_have_separate_declarations_of_a_private_property_0, symbolToString(targetProp));
+                                        }
+                                        else {
+                                            reportError(ts.Diagnostics.Property_0_is_private_in_type_1_but_not_in_type_2, symbolToString(targetProp), typeToString(sourcePropFlags & 8 /* Private */ ? source : target), typeToString(sourcePropFlags & 8 /* Private */ ? target : source));
+                                        }
+                                    }
+                                    return 0 /* False */;
+                                }
+                            }
+                            else if (targetPropFlags & 16 /* Protected */) {
+                                var sourceDeclaredInClass = sourceProp.parent && sourceProp.parent.flags & 32 /* Class */;
+                                var sourceClass = sourceDeclaredInClass ? getDeclaredTypeOfSymbol(getParentOfSymbol(sourceProp)) : undefined;
+                                var targetClass = getDeclaredTypeOfSymbol(getParentOfSymbol(targetProp));
+                                if (!sourceClass || !hasBaseType(sourceClass, targetClass)) {
+                                    if (reportErrors) {
+                                        reportError(ts.Diagnostics.Property_0_is_protected_but_type_1_is_not_a_class_derived_from_2, symbolToString(targetProp), typeToString(sourceClass || source), typeToString(targetClass));
+                                    }
+                                    return 0 /* False */;
+                                }
+                            }
+                            else if (sourcePropFlags & 16 /* Protected */) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_protected_in_type_1_but_public_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0 /* False */;
+                            }
+                            var related = isRelatedTo(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp), reportErrors);
+                            if (!related) {
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Types_of_property_0_are_incompatible, symbolToString(targetProp));
+                                }
+                                return 0 /* False */;
+                            }
+                            result &= related;
+                            if (sourceProp.flags & 536870912 /* Optional */ && !(targetProp.flags & 536870912 /* Optional */)) {
+                                // TypeScript 1.0 spec (April 2014): 3.8.3
+                                // S is a subtype of a type T, and T is a supertype of S if ...
+                                // S' and T are object types and, for each member M in T..
+                                // M is a property and S' contains a property N where
+                                // if M is a required property, N is also a required property
+                                // (M - property in T)
+                                // (N - property in S)
+                                if (reportErrors) {
+                                    reportError(ts.Diagnostics.Property_0_is_optional_in_type_1_but_required_in_type_2, symbolToString(targetProp), typeToString(source), typeToString(target));
+                                }
+                                return 0 /* False */;
+                            }
+                        }
+                    }
+                }
+                return result;
+            }
+            function propertiesIdenticalTo(source, target) {
+                if (!(source.flags & 80896 /* ObjectType */ && target.flags & 80896 /* ObjectType */)) {
+                    return 0 /* False */;
+                }
+                var sourceProperties = getPropertiesOfObjectType(source);
+                var targetProperties = getPropertiesOfObjectType(target);
+                if (sourceProperties.length !== targetProperties.length) {
+                    return 0 /* False */;
+                }
+                var result = -1 /* True */;
+                for (var _i = 0, sourceProperties_1 = sourceProperties; _i < sourceProperties_1.length; _i++) {
+                    var sourceProp = sourceProperties_1[_i];
+                    var targetProp = getPropertyOfObjectType(target, sourceProp.name);
+                    if (!targetProp) {
+                        return 0 /* False */;
+                    }
+                    var related = compareProperties(sourceProp, targetProp, isRelatedTo);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function signaturesRelatedTo(source, target, kind, reportErrors) {
+                if (relation === identityRelation) {
+                    return signaturesIdenticalTo(source, target, kind);
+                }
+                if (target === anyFunctionType || source === anyFunctionType) {
+                    return -1 /* True */;
+                }
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (kind === 1 /* Construct */ && sourceSignatures.length && targetSignatures.length) {
+                    if (isAbstractConstructorType(source) && !isAbstractConstructorType(target)) {
+                        // An abstract constructor type is not assignable to a non-abstract constructor type
+                        // as it would otherwise be possible to new an abstract class. Note that the assignability
+                        // check we perform for an extends clause excludes construct signatures from the target,
+                        // so this check never proceeds.
+                        if (reportErrors) {
+                            reportError(ts.Diagnostics.Cannot_assign_an_abstract_constructor_type_to_a_non_abstract_constructor_type);
+                        }
+                        return 0 /* False */;
+                    }
+                    if (!constructorVisibilitiesAreCompatible(sourceSignatures[0], targetSignatures[0], reportErrors)) {
+                        return 0 /* False */;
+                    }
+                }
+                var result = -1 /* True */;
+                var saveErrorInfo = errorInfo;
+                outer: for (var _i = 0, targetSignatures_1 = targetSignatures; _i < targetSignatures_1.length; _i++) {
+                    var t = targetSignatures_1[_i];
+                    // Only elaborate errors from the first failure
+                    var shouldElaborateErrors = reportErrors;
+                    for (var _a = 0, sourceSignatures_1 = sourceSignatures; _a < sourceSignatures_1.length; _a++) {
+                        var s = sourceSignatures_1[_a];
+                        var related = signatureRelatedTo(s, t, shouldElaborateErrors);
+                        if (related) {
+                            result &= related;
+                            errorInfo = saveErrorInfo;
+                            continue outer;
+                        }
+                        shouldElaborateErrors = false;
+                    }
+                    if (shouldElaborateErrors) {
+                        reportError(ts.Diagnostics.Type_0_provides_no_match_for_the_signature_1, typeToString(source), signatureToString(t, /*enclosingDeclaration*/ undefined, /*flags*/ undefined, kind));
+                    }
+                    return 0 /* False */;
+                }
+                return result;
+            }
+            /**
+             * See signatureAssignableTo, compareSignaturesIdentical
+             */
+            function signatureRelatedTo(source, target, reportErrors) {
+                return compareSignaturesRelated(source, target, /*ignoreReturnTypes*/ false, reportErrors, reportError, isRelatedTo);
+            }
+            function signaturesIdenticalTo(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                if (sourceSignatures.length !== targetSignatures.length) {
+                    return 0 /* False */;
+                }
+                var result = -1 /* True */;
+                for (var i = 0, len = sourceSignatures.length; i < len; i++) {
+                    var related = compareSignaturesIdentical(sourceSignatures[i], targetSignatures[i], /*partialMatch*/ false, /*ignoreThisTypes*/ false, /*ignoreReturnTypes*/ false, isRelatedTo);
+                    if (!related) {
+                        return 0 /* False */;
+                    }
+                    result &= related;
+                }
+                return result;
+            }
+            function eachPropertyRelatedTo(source, target, kind, reportErrors) {
+                var result = -1 /* True */;
+                for (var _i = 0, _a = getPropertiesOfObjectType(source); _i < _a.length; _i++) {
+                    var prop = _a[_i];
+                    if (kind === 0 /* String */ || isNumericLiteralName(prop.name)) {
+                        var related = isRelatedTo(getTypeOfSymbol(prop), target, reportErrors);
+                        if (!related) {
+                            if (reportErrors) {
+                                reportError(ts.Diagnostics.Property_0_is_incompatible_with_index_signature, symbolToString(prop));
+                            }
+                            return 0 /* False */;
+                        }
+                        result &= related;
+                    }
+                }
+                return result;
+            }
+            function indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors) {
+                var related = isRelatedTo(sourceInfo.type, targetInfo.type, reportErrors);
+                if (!related && reportErrors) {
+                    reportError(ts.Diagnostics.Index_signatures_are_incompatible);
+                }
+                return related;
+            }
+            function indexTypesRelatedTo(source, originalSource, target, kind, reportErrors) {
+                if (relation === identityRelation) {
+                    return indexTypesIdenticalTo(source, target, kind);
+                }
+                var targetInfo = getIndexInfoOfType(target, kind);
+                if (!targetInfo || ((targetInfo.type.flags & 1 /* Any */) && !(originalSource.flags & 16777726 /* Primitive */))) {
+                    // Index signature of type any permits assignment from everything but primitives
+                    return -1 /* True */;
+                }
+                var sourceInfo = getIndexInfoOfType(source, kind) ||
+                    kind === 1 /* Number */ && getIndexInfoOfType(source, 0 /* String */);
+                if (sourceInfo) {
+                    return indexInfoRelatedTo(sourceInfo, targetInfo, reportErrors);
+                }
+                if (isObjectLiteralType(source)) {
+                    var related = -1 /* True */;
+                    if (kind === 0 /* String */) {
+                        var sourceNumberInfo = getIndexInfoOfType(source, 1 /* Number */);
+                        if (sourceNumberInfo) {
+                            related = indexInfoRelatedTo(sourceNumberInfo, targetInfo, reportErrors);
+                        }
+                    }
+                    if (related) {
+                        related &= eachPropertyRelatedTo(source, targetInfo.type, kind, reportErrors);
+                    }
+                    return related;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Index_signature_is_missing_in_type_0, typeToString(source));
+                }
+                return 0 /* False */;
+            }
+            function indexTypesIdenticalTo(source, target, indexKind) {
+                var targetInfo = getIndexInfoOfType(target, indexKind);
+                var sourceInfo = getIndexInfoOfType(source, indexKind);
+                if (!sourceInfo && !targetInfo) {
+                    return -1 /* True */;
+                }
+                if (sourceInfo && targetInfo && sourceInfo.isReadonly === targetInfo.isReadonly) {
+                    return isRelatedTo(sourceInfo.type, targetInfo.type);
+                }
+                return 0 /* False */;
+            }
+            function enumRelatedTo(source, target, reportErrors) {
+                if (source.symbol.name !== target.symbol.name ||
+                    source.symbol.flags & 128 /* ConstEnum */ ||
+                    target.symbol.flags & 128 /* ConstEnum */) {
+                    return 0 /* False */;
+                }
+                var targetEnumType = getTypeOfSymbol(target.symbol);
+                for (var _i = 0, _a = getPropertiesOfType(getTypeOfSymbol(source.symbol)); _i < _a.length; _i++) {
+                    var property = _a[_i];
+                    if (property.flags & 8 /* EnumMember */) {
+                        var targetProperty = getPropertyOfType(targetEnumType, property.name);
+                        if (!targetProperty || !(targetProperty.flags & 8 /* EnumMember */)) {
+                            if (reportErrors) {
+                                reportError(ts.Diagnostics.Property_0_is_missing_in_type_1, property.name, typeToString(target, /*enclosingDeclaration*/ undefined, 128 /* UseFullyQualifiedType */));
+                            }
+                            return 0 /* False */;
+                        }
+                    }
+                }
+                return -1 /* True */;
+            }
+            function constructorVisibilitiesAreCompatible(sourceSignature, targetSignature, reportErrors) {
+                if (!sourceSignature.declaration || !targetSignature.declaration) {
+                    return true;
+                }
+                var sourceAccessibility = sourceSignature.declaration.flags & (8 /* Private */ | 16 /* Protected */);
+                var targetAccessibility = targetSignature.declaration.flags & (8 /* Private */ | 16 /* Protected */);
+                // A public, protected and private signature is assignable to a private signature.
+                if (targetAccessibility === 8 /* Private */) {
+                    return true;
+                }
+                // A public and protected signature is assignable to a protected signature.
+                if (targetAccessibility === 16 /* Protected */ && sourceAccessibility !== 8 /* Private */) {
+                    return true;
+                }
+                // Only a public signature is assignable to public signature.
+                if (targetAccessibility !== 16 /* Protected */ && !sourceAccessibility) {
+                    return true;
+                }
+                if (reportErrors) {
+                    reportError(ts.Diagnostics.Cannot_assign_a_0_constructor_type_to_a_1_constructor_type, visibilityToString(sourceAccessibility), visibilityToString(targetAccessibility));
+                }
+                return false;
+            }
+        }
+        // Return true if the given type is the constructor type for an abstract class
+        function isAbstractConstructorType(type) {
+            if (type.flags & 65536 /* Anonymous */) {
+                var symbol = type.symbol;
+                if (symbol && symbol.flags & 32 /* Class */) {
+                    var declaration = getClassLikeDeclarationOfSymbol(symbol);
+                    if (declaration && declaration.flags & 128 /* Abstract */) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        // Return true if the given type is part of a deeply nested chain of generic instantiations. We consider this to be the case
+        // when structural type comparisons have been started for 10 or more instantiations of the same generic type. It is possible,
+        // though highly unlikely, for this test to be true in a situation where a chain of instantiations is not infinitely expanding.
+        // Effectively, we will generate a false positive when two types are structurally equal to at least 10 levels, but unequal at
+        // some level beyond that.
+        function isDeeplyNestedGeneric(type, stack, depth) {
+            // We track type references (created by createTypeReference) and instantiated types (created by instantiateType)
+            if (type.flags & (4096 /* Reference */ | 131072 /* Instantiated */) && depth >= 5) {
+                var symbol = type.symbol;
+                var count = 0;
+                for (var i = 0; i < depth; i++) {
+                    var t = stack[i];
+                    if (t.flags & (4096 /* Reference */ | 131072 /* Instantiated */) && t.symbol === symbol) {
+                        count++;
+                        if (count >= 5)
+                            return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isPropertyIdenticalTo(sourceProp, targetProp) {
+            return compareProperties(sourceProp, targetProp, compareTypesIdentical) !== 0 /* False */;
+        }
+        function compareProperties(sourceProp, targetProp, compareTypes) {
+            // Two members are considered identical when
+            // - they are public properties with identical names, optionality, and types,
+            // - they are private or protected properties originating in the same declaration and having identical types
+            if (sourceProp === targetProp) {
+                return -1 /* True */;
+            }
+            var sourcePropAccessibility = getDeclarationFlagsFromSymbol(sourceProp) & (8 /* Private */ | 16 /* Protected */);
+            var targetPropAccessibility = getDeclarationFlagsFromSymbol(targetProp) & (8 /* Private */ | 16 /* Protected */);
+            if (sourcePropAccessibility !== targetPropAccessibility) {
+                return 0 /* False */;
+            }
+            if (sourcePropAccessibility) {
+                if (getTargetSymbol(sourceProp) !== getTargetSymbol(targetProp)) {
+                    return 0 /* False */;
+                }
+            }
+            else {
+                if ((sourceProp.flags & 536870912 /* Optional */) !== (targetProp.flags & 536870912 /* Optional */)) {
+                    return 0 /* False */;
+                }
+            }
+            if (isReadonlySymbol(sourceProp) !== isReadonlySymbol(targetProp)) {
+                return 0 /* False */;
+            }
+            return compareTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+        }
+        function isMatchingSignature(source, target, partialMatch) {
+            // A source signature matches a target signature if the two signatures have the same number of required,
+            // optional, and rest parameters.
+            if (source.parameters.length === target.parameters.length &&
+                source.minArgumentCount === target.minArgumentCount &&
+                source.hasRestParameter === target.hasRestParameter) {
+                return true;
+            }
+            // A source signature partially matches a target signature if the target signature has no fewer required
+            // parameters and no more overall parameters than the source signature (where a signature with a rest
+            // parameter is always considered to have more overall parameters than one without).
+            if (partialMatch && source.minArgumentCount <= target.minArgumentCount && (source.hasRestParameter && !target.hasRestParameter ||
+                source.hasRestParameter === target.hasRestParameter && source.parameters.length >= target.parameters.length)) {
+                return true;
+            }
+            return false;
+        }
+        /**
+         * See signatureRelatedTo, compareSignaturesIdentical
+         */
+        function compareSignaturesIdentical(source, target, partialMatch, ignoreThisTypes, ignoreReturnTypes, compareTypes) {
+            // TODO (drosen): De-duplicate code between related functions.
+            if (source === target) {
+                return -1 /* True */;
+            }
+            if (!(isMatchingSignature(source, target, partialMatch))) {
+                return 0 /* False */;
+            }
+            // Check that the two signatures have the same number of type parameters. We might consider
+            // also checking that any type parameter constraints match, but that would require instantiating
+            // the constraints with a common set of type arguments to get relatable entities in places where
+            // type parameters occur in the constraints. The complexity of doing that doesn't seem worthwhile,
+            // particularly as we're comparing erased versions of the signatures below.
+            if ((source.typeParameters ? source.typeParameters.length : 0) !== (target.typeParameters ? target.typeParameters.length : 0)) {
+                return 0 /* False */;
+            }
+            // Spec 1.0 Section 3.8.3 & 3.8.4:
+            // M and N (the signatures) are instantiated using type Any as the type argument for all type parameters declared by M and N
+            source = getErasedSignature(source);
+            target = getErasedSignature(target);
+            var result = -1 /* True */;
+            if (!ignoreThisTypes && source.thisType && target.thisType) {
+                var related = compareTypes(source.thisType, target.thisType);
+                if (!related) {
+                    return 0 /* False */;
+                }
+                result &= related;
+            }
+            var targetLen = target.parameters.length;
+            for (var i = 0; i < targetLen; i++) {
+                var s = isRestParameterIndex(source, i) ? getRestTypeOfSignature(source) : getTypeOfParameter(source.parameters[i]);
+                var t = isRestParameterIndex(target, i) ? getRestTypeOfSignature(target) : getTypeOfParameter(target.parameters[i]);
+                var related = compareTypes(s, t);
+                if (!related) {
+                    return 0 /* False */;
+                }
+                result &= related;
+            }
+            if (!ignoreReturnTypes) {
+                result &= compareTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+            }
+            return result;
+        }
+        function isRestParameterIndex(signature, parameterIndex) {
+            return signature.hasRestParameter && parameterIndex >= signature.parameters.length - 1;
+        }
+        function isSupertypeOfEach(candidate, types) {
+            for (var _i = 0, types_5 = types; _i < types_5.length; _i++) {
+                var t = types_5[_i];
+                if (candidate !== t && !isTypeSubtypeOf(t, candidate))
+                    return false;
+            }
+            return true;
+        }
+        function getCombinedFlagsOfTypes(types) {
+            var flags = 0;
+            for (var _i = 0, types_6 = types; _i < types_6.length; _i++) {
+                var t = types_6[_i];
+                flags |= t.flags;
+            }
+            return flags;
+        }
+        function getCommonSupertype(types) {
+            if (!strictNullChecks) {
+                return ts.forEach(types, function (t) { return isSupertypeOfEach(t, types) ? t : undefined; });
+            }
+            var primaryTypes = ts.filter(types, function (t) { return !(t.flags & 96 /* Nullable */); });
+            if (!primaryTypes.length) {
+                return getUnionType(types);
+            }
+            var supertype = ts.forEach(primaryTypes, function (t) { return isSupertypeOfEach(t, primaryTypes) ? t : undefined; });
+            return supertype && addTypeKind(supertype, getCombinedFlagsOfTypes(types) & 96 /* Nullable */);
+        }
+        function reportNoCommonSupertypeError(types, errorLocation, errorMessageChainHead) {
+            // The downfallType/bestSupertypeDownfallType is the first type that caused a particular candidate
+            // to not be the common supertype. So if it weren't for this one downfallType (and possibly others),
+            // the type in question could have been the common supertype.
+            var bestSupertype;
+            var bestSupertypeDownfallType;
+            var bestSupertypeScore = 0;
+            for (var i = 0; i < types.length; i++) {
+                var score = 0;
+                var downfallType = undefined;
+                for (var j = 0; j < types.length; j++) {
+                    if (isTypeSubtypeOf(types[j], types[i])) {
+                        score++;
+                    }
+                    else if (!downfallType) {
+                        downfallType = types[j];
+                    }
+                }
+                ts.Debug.assert(!!downfallType, "If there is no common supertype, each type should have a downfallType");
+                if (score > bestSupertypeScore) {
+                    bestSupertype = types[i];
+                    bestSupertypeDownfallType = downfallType;
+                    bestSupertypeScore = score;
+                }
+                // types.length - 1 is the maximum score, given that getCommonSupertype returned false
+                if (bestSupertypeScore === types.length - 1) {
+                    break;
+                }
+            }
+            // In the following errors, the {1} slot is before the {0} slot because checkTypeSubtypeOf supplies the
+            // subtype as the first argument to the error
+            checkTypeSubtypeOf(bestSupertypeDownfallType, bestSupertype, errorLocation, ts.Diagnostics.Type_argument_candidate_1_is_not_a_valid_type_argument_because_it_is_not_a_supertype_of_candidate_0, errorMessageChainHead);
+        }
+        function isArrayType(type) {
+            return type.flags & 4096 /* Reference */ && type.target === globalArrayType;
+        }
+        function isArrayLikeType(type) {
+            // A type is array-like if it is a reference to the global Array or global ReadonlyArray type,
+            // or if it is not the undefined or null type and if it is assignable to ReadonlyArray<any>
+            return type.flags & 4096 /* Reference */ && (type.target === globalArrayType || type.target === globalReadonlyArrayType) ||
+                !(type.flags & 96 /* Nullable */) && isTypeAssignableTo(type, anyReadonlyArrayType);
+        }
+        function isTupleLikeType(type) {
+            return !!getPropertyOfType(type, "0");
+        }
+        function isStringLiteralType(type) {
+            return type.flags & 256 /* StringLiteral */;
+        }
+        /**
+         * Check if a Type was written as a tuple type literal.
+         * Prefer using isTupleLikeType() unless the use of `elementTypes` is required.
+         */
+        function isTupleType(type) {
+            return !!(type.flags & 8192 /* Tuple */);
+        }
+        function getCombinedTypeFlags(type) {
+            return type.flags & 16384 /* Union */ ? getCombinedFlagsOfTypes(type.types) : type.flags;
+        }
+        function addTypeKind(type, kind) {
+            if ((getCombinedTypeFlags(type) & kind) === kind) {
+                return type;
+            }
+            var types = [type];
+            if (kind & 2 /* String */)
+                types.push(stringType);
+            if (kind & 4 /* Number */)
+                types.push(numberType);
+            if (kind & 8 /* Boolean */)
+                types.push(booleanType);
+            if (kind & 16 /* Void */)
+                types.push(voidType);
+            if (kind & 32 /* Undefined */)
+                types.push(undefinedType);
+            if (kind & 64 /* Null */)
+                types.push(nullType);
+            return getUnionType(types);
+        }
+        function getNonNullableType(type) {
+            return strictNullChecks ? getTypeWithFacts(type, 524288 /* NEUndefinedOrNull */) : type;
+        }
+        /**
+         * Return true if type was inferred from an object literal or written as an object type literal
+         * with no call or construct signatures.
+         */
+        function isObjectLiteralType(type) {
+            return type.symbol && (type.symbol.flags & (4096 /* ObjectLiteral */ | 2048 /* TypeLiteral */)) !== 0 &&
+                getSignaturesOfType(type, 0 /* Call */).length === 0 &&
+                getSignaturesOfType(type, 1 /* Construct */).length === 0;
+        }
+        function createTransientSymbol(source, type) {
+            var symbol = createSymbol(source.flags | 67108864 /* Transient */, source.name);
+            symbol.declarations = source.declarations;
+            symbol.parent = source.parent;
+            symbol.type = type;
+            symbol.target = source;
+            if (source.valueDeclaration) {
+                symbol.valueDeclaration = source.valueDeclaration;
+            }
+            return symbol;
+        }
+        function transformTypeOfMembers(type, f) {
+            var members = {};
+            for (var _i = 0, _a = getPropertiesOfObjectType(type); _i < _a.length; _i++) {
+                var property = _a[_i];
+                var original = getTypeOfSymbol(property);
+                var updated = f(original);
+                members[property.name] = updated === original ? property : createTransientSymbol(property, updated);
+            }
+            ;
+            return members;
+        }
+        /**
+         * If the the provided object literal is subject to the excess properties check,
+         * create a new that is exempt. Recursively mark object literal members as exempt.
+         * Leave signatures alone since they are not subject to the check.
+         */
+        function getRegularTypeOfObjectLiteral(type) {
+            if (!(type.flags & 1048576 /* FreshObjectLiteral */)) {
+                return type;
+            }
+            var regularType = type.regularType;
+            if (regularType) {
+                return regularType;
+            }
+            var resolved = type;
+            var members = transformTypeOfMembers(type, getRegularTypeOfObjectLiteral);
+            var regularNew = createAnonymousType(resolved.symbol, members, resolved.callSignatures, resolved.constructSignatures, resolved.stringIndexInfo, resolved.numberIndexInfo);
+            regularNew.flags = resolved.flags & ~1048576 /* FreshObjectLiteral */;
+            type.regularType = regularNew;
+            return regularNew;
+        }
+        function getWidenedTypeOfObjectLiteral(type) {
+            var members = transformTypeOfMembers(type, function (prop) {
+                var widened = getWidenedType(prop);
+                return prop === widened ? prop : widened;
+            });
+            var stringIndexInfo = getIndexInfoOfType(type, 0 /* String */);
+            var numberIndexInfo = getIndexInfoOfType(type, 1 /* Number */);
+            return createAnonymousType(type.symbol, members, emptyArray, emptyArray, stringIndexInfo && createIndexInfo(getWidenedType(stringIndexInfo.type), stringIndexInfo.isReadonly), numberIndexInfo && createIndexInfo(getWidenedType(numberIndexInfo.type), numberIndexInfo.isReadonly));
+        }
+        function getWidenedConstituentType(type) {
+            return type.flags & 96 /* Nullable */ ? type : getWidenedType(type);
+        }
+        function getWidenedType(type) {
+            if (type.flags & 6291456 /* RequiresWidening */) {
+                if (type.flags & 96 /* Nullable */) {
+                    return anyType;
+                }
+                if (type.flags & 524288 /* ObjectLiteral */) {
+                    return getWidenedTypeOfObjectLiteral(type);
+                }
+                if (type.flags & 16384 /* Union */) {
+                    return getUnionType(ts.map(type.types, getWidenedConstituentType), /*noSubtypeReduction*/ true);
+                }
+                if (isArrayType(type)) {
+                    return createArrayType(getWidenedType(type.typeArguments[0]));
+                }
+                if (isTupleType(type)) {
+                    return createTupleType(ts.map(type.elementTypes, getWidenedType));
+                }
+            }
+            return type;
+        }
+        /**
+         * Reports implicit any errors that occur as a result of widening 'null' and 'undefined'
+         * to 'any'. A call to reportWideningErrorsInType is normally accompanied by a call to
+         * getWidenedType. But in some cases getWidenedType is called without reporting errors
+         * (type argument inference is an example).
+         *
+         * The return value indicates whether an error was in fact reported. The particular circumstances
+         * are on a best effort basis. Currently, if the null or undefined that causes widening is inside
+         * an object literal property (arbitrarily deeply), this function reports an error. If no error is
+         * reported, reportImplicitAnyError is a suitable fallback to report a general error.
+         */
+        function reportWideningErrorsInType(type) {
+            var errorReported = false;
+            if (type.flags & 16384 /* Union */) {
+                for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                    var t = _a[_i];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
+                }
+            }
+            if (isArrayType(type)) {
+                return reportWideningErrorsInType(type.typeArguments[0]);
+            }
+            if (isTupleType(type)) {
+                for (var _b = 0, _c = type.elementTypes; _b < _c.length; _b++) {
+                    var t = _c[_b];
+                    if (reportWideningErrorsInType(t)) {
+                        errorReported = true;
+                    }
+                }
+            }
+            if (type.flags & 524288 /* ObjectLiteral */) {
+                for (var _d = 0, _e = getPropertiesOfObjectType(type); _d < _e.length; _d++) {
+                    var p = _e[_d];
+                    var t = getTypeOfSymbol(p);
+                    if (t.flags & 2097152 /* ContainsWideningType */) {
+                        if (!reportWideningErrorsInType(t)) {
+                            error(p.valueDeclaration, ts.Diagnostics.Object_literal_s_property_0_implicitly_has_an_1_type, p.name, typeToString(getWidenedType(t)));
+                        }
+                        errorReported = true;
+                    }
+                }
+            }
+            return errorReported;
+        }
+        function reportImplicitAnyError(declaration, type) {
+            var typeAsString = typeToString(getWidenedType(type));
+            var diagnostic;
+            switch (declaration.kind) {
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                    diagnostic = ts.Diagnostics.Member_0_implicitly_has_an_1_type;
+                    break;
+                case 142 /* Parameter */:
+                    diagnostic = declaration.dotDotDotToken ?
+                        ts.Diagnostics.Rest_parameter_0_implicitly_has_an_any_type :
+                        ts.Diagnostics.Parameter_0_implicitly_has_an_1_type;
+                    break;
+                case 169 /* BindingElement */:
+                    diagnostic = ts.Diagnostics.Binding_element_0_implicitly_has_an_1_type;
+                    break;
+                case 220 /* FunctionDeclaration */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    if (!declaration.name) {
+                        error(declaration, ts.Diagnostics.Function_expression_which_lacks_return_type_annotation_implicitly_has_an_0_return_type, typeAsString);
+                        return;
+                    }
+                    diagnostic = ts.Diagnostics._0_which_lacks_return_type_annotation_implicitly_has_an_1_return_type;
+                    break;
+                default:
+                    diagnostic = ts.Diagnostics.Variable_0_implicitly_has_an_1_type;
+            }
+            error(declaration, diagnostic, ts.declarationNameToString(declaration.name), typeAsString);
+        }
+        function reportErrorsFromWidening(declaration, type) {
+            if (produceDiagnostics && compilerOptions.noImplicitAny && type.flags & 2097152 /* ContainsWideningType */) {
+                // Report implicit any error within type if possible, otherwise report error on declaration
+                if (!reportWideningErrorsInType(type)) {
+                    reportImplicitAnyError(declaration, type);
+                }
+            }
+        }
+        function forEachMatchingParameterType(source, target, callback) {
+            var sourceMax = source.parameters.length;
+            var targetMax = target.parameters.length;
+            var count;
+            if (source.hasRestParameter && target.hasRestParameter) {
+                count = Math.max(sourceMax, targetMax);
+            }
+            else if (source.hasRestParameter) {
+                count = targetMax;
+            }
+            else if (target.hasRestParameter) {
+                count = sourceMax;
+            }
+            else {
+                count = Math.min(sourceMax, targetMax);
+            }
+            for (var i = 0; i < count; i++) {
+                callback(getTypeAtPosition(source, i), getTypeAtPosition(target, i));
+            }
+        }
+        function createInferenceContext(typeParameters, inferUnionTypes) {
+            var inferences = ts.map(typeParameters, createTypeInferencesObject);
+            return {
+                typeParameters: typeParameters,
+                inferUnionTypes: inferUnionTypes,
+                inferences: inferences,
+                inferredTypes: new Array(typeParameters.length)
+            };
+        }
+        function createTypeInferencesObject() {
+            return {
+                primary: undefined,
+                secondary: undefined,
+                isFixed: false
+            };
+        }
+        function inferTypes(context, source, target) {
+            var sourceStack;
+            var targetStack;
+            var depth = 0;
+            var inferiority = 0;
+            var visited = {};
+            inferFromTypes(source, target);
+            function isInProcess(source, target) {
+                for (var i = 0; i < depth; i++) {
+                    if (source === sourceStack[i] && target === targetStack[i]) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function inferFromTypes(source, target) {
+                if (source.flags & 16384 /* Union */ && target.flags & 16384 /* Union */ ||
+                    source.flags & 32768 /* Intersection */ && target.flags & 32768 /* Intersection */) {
+                    // Source and target are both unions or both intersections. First, find each
+                    // target constituent type that has an identically matching source constituent
+                    // type, and for each such target constituent type infer from the type to itself.
+                    // When inferring from a type to itself we effectively find all type parameter
+                    // occurrences within that type and infer themselves as their type arguments.
+                    var matchingTypes = void 0;
+                    for (var _i = 0, _a = target.types; _i < _a.length; _i++) {
+                        var t = _a[_i];
+                        if (typeIdenticalToSomeType(t, source.types)) {
+                            (matchingTypes || (matchingTypes = [])).push(t);
+                            inferFromTypes(t, t);
+                        }
+                    }
+                    // Next, to improve the quality of inferences, reduce the source and target types by
+                    // removing the identically matched constituents. For example, when inferring from
+                    // 'string | string[]' to 'string | T' we reduce the types to 'string[]' and 'T'.
+                    if (matchingTypes) {
+                        source = removeTypesFromUnionOrIntersection(source, matchingTypes);
+                        target = removeTypesFromUnionOrIntersection(target, matchingTypes);
+                    }
+                }
+                if (target.flags & 512 /* TypeParameter */) {
+                    // If target is a type parameter, make an inference, unless the source type contains
+                    // the anyFunctionType (the wildcard type that's used to avoid contextually typing functions).
+                    // Because the anyFunctionType is internal, it should not be exposed to the user by adding
+                    // it as an inference candidate. Hopefully, a better candidate will come along that does
+                    // not contain anyFunctionType when we come back to this argument for its second round
+                    // of inference.
+                    if (source.flags & 8388608 /* ContainsAnyFunctionType */) {
+                        return;
+                    }
+                    var typeParameters = context.typeParameters;
+                    for (var i = 0; i < typeParameters.length; i++) {
+                        if (target === typeParameters[i]) {
+                            var inferences = context.inferences[i];
+                            if (!inferences.isFixed) {
+                                // Any inferences that are made to a type parameter in a union type are inferior
+                                // to inferences made to a flat (non-union) type. This is because if we infer to
+                                // T | string[], we really don't know if we should be inferring to T or not (because
+                                // the correct constituent on the target side could be string[]). Therefore, we put
+                                // such inferior inferences into a secondary bucket, and only use them if the primary
+                                // bucket is empty.
+                                var candidates = inferiority ?
+                                    inferences.secondary || (inferences.secondary = []) :
+                                    inferences.primary || (inferences.primary = []);
+                                if (!ts.contains(candidates, source)) {
+                                    candidates.push(source);
+                                }
+                            }
+                            return;
+                        }
+                    }
+                }
+                else if (source.flags & 4096 /* Reference */ && target.flags & 4096 /* Reference */ && source.target === target.target) {
+                    // If source and target are references to the same generic type, infer from type arguments
+                    var sourceTypes = source.typeArguments || emptyArray;
+                    var targetTypes = target.typeArguments || emptyArray;
+                    var count = sourceTypes.length < targetTypes.length ? sourceTypes.length : targetTypes.length;
+                    for (var i = 0; i < count; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
+                }
+                else if (source.flags & 8192 /* Tuple */ && target.flags & 8192 /* Tuple */ && source.elementTypes.length === target.elementTypes.length) {
+                    // If source and target are tuples of the same size, infer from element types
+                    var sourceTypes = source.elementTypes;
+                    var targetTypes = target.elementTypes;
+                    for (var i = 0; i < sourceTypes.length; i++) {
+                        inferFromTypes(sourceTypes[i], targetTypes[i]);
+                    }
+                }
+                else if (target.flags & 49152 /* UnionOrIntersection */) {
+                    var targetTypes = target.types;
+                    var typeParameterCount = 0;
+                    var typeParameter = void 0;
+                    // First infer to each type in union or intersection that isn't a type parameter
+                    for (var _b = 0, targetTypes_2 = targetTypes; _b < targetTypes_2.length; _b++) {
+                        var t = targetTypes_2[_b];
+                        if (t.flags & 512 /* TypeParameter */ && ts.contains(context.typeParameters, t)) {
+                            typeParameter = t;
+                            typeParameterCount++;
+                        }
+                        else {
+                            inferFromTypes(source, t);
+                        }
+                    }
+                    // Next, if target containings a single naked type parameter, make a secondary inference to that type
+                    // parameter. This gives meaningful results for union types in co-variant positions and intersection
+                    // types in contra-variant positions (such as callback parameters).
+                    if (typeParameterCount === 1) {
+                        inferiority++;
+                        inferFromTypes(source, typeParameter);
+                        inferiority--;
+                    }
+                }
+                else if (source.flags & 49152 /* UnionOrIntersection */) {
+                    // Source is a union or intersection type, infer from each constituent type
+                    var sourceTypes = source.types;
+                    for (var _c = 0, sourceTypes_3 = sourceTypes; _c < sourceTypes_3.length; _c++) {
+                        var sourceType = sourceTypes_3[_c];
+                        inferFromTypes(sourceType, target);
+                    }
+                }
+                else {
+                    source = getApparentType(source);
+                    if (source.flags & 80896 /* ObjectType */ && (target.flags & 4096 /* Reference */ && target.typeArguments ||
+                        target.flags & 8192 /* Tuple */ ||
+                        target.flags & 65536 /* Anonymous */ && target.symbol && target.symbol.flags & (8192 /* Method */ | 2048 /* TypeLiteral */ | 32 /* Class */))) {
+                        // If source is an object type, and target is a type reference with type arguments, a tuple type,
+                        // the type of a method, or a type literal, infer from members
+                        if (isInProcess(source, target)) {
+                            return;
+                        }
+                        if (isDeeplyNestedGeneric(source, sourceStack, depth) && isDeeplyNestedGeneric(target, targetStack, depth)) {
+                            return;
+                        }
+                        var key = source.id + "," + target.id;
+                        if (ts.hasProperty(visited, key)) {
+                            return;
+                        }
+                        visited[key] = true;
+                        if (depth === 0) {
+                            sourceStack = [];
+                            targetStack = [];
+                        }
+                        sourceStack[depth] = source;
+                        targetStack[depth] = target;
+                        depth++;
+                        inferFromProperties(source, target);
+                        inferFromSignatures(source, target, 0 /* Call */);
+                        inferFromSignatures(source, target, 1 /* Construct */);
+                        inferFromIndexTypes(source, target);
+                        depth--;
+                    }
+                }
+            }
+            function inferFromProperties(source, target) {
+                var properties = getPropertiesOfObjectType(target);
+                for (var _i = 0, properties_2 = properties; _i < properties_2.length; _i++) {
+                    var targetProp = properties_2[_i];
+                    var sourceProp = getPropertyOfObjectType(source, targetProp.name);
+                    if (sourceProp) {
+                        inferFromTypes(getTypeOfSymbol(sourceProp), getTypeOfSymbol(targetProp));
+                    }
+                }
+            }
+            function inferFromSignatures(source, target, kind) {
+                var sourceSignatures = getSignaturesOfType(source, kind);
+                var targetSignatures = getSignaturesOfType(target, kind);
+                var sourceLen = sourceSignatures.length;
+                var targetLen = targetSignatures.length;
+                var len = sourceLen < targetLen ? sourceLen : targetLen;
+                for (var i = 0; i < len; i++) {
+                    inferFromSignature(getErasedSignature(sourceSignatures[sourceLen - len + i]), getErasedSignature(targetSignatures[targetLen - len + i]));
+                }
+            }
+            function inferFromSignature(source, target) {
+                forEachMatchingParameterType(source, target, inferFromTypes);
+                if (source.typePredicate && target.typePredicate && source.typePredicate.kind === target.typePredicate.kind) {
+                    inferFromTypes(source.typePredicate.type, target.typePredicate.type);
+                }
+                else {
+                    inferFromTypes(getReturnTypeOfSignature(source), getReturnTypeOfSignature(target));
+                }
+            }
+            function inferFromIndexTypes(source, target) {
+                var targetStringIndexType = getIndexTypeOfType(target, 0 /* String */);
+                if (targetStringIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 0 /* String */) ||
+                        getImplicitIndexTypeOfType(source, 0 /* String */);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetStringIndexType);
+                    }
+                }
+                var targetNumberIndexType = getIndexTypeOfType(target, 1 /* Number */);
+                if (targetNumberIndexType) {
+                    var sourceIndexType = getIndexTypeOfType(source, 1 /* Number */) ||
+                        getIndexTypeOfType(source, 0 /* String */) ||
+                        getImplicitIndexTypeOfType(source, 1 /* Number */);
+                    if (sourceIndexType) {
+                        inferFromTypes(sourceIndexType, targetNumberIndexType);
+                    }
+                }
+            }
+        }
+        function typeIdenticalToSomeType(type, types) {
+            for (var _i = 0, types_7 = types; _i < types_7.length; _i++) {
+                var t = types_7[_i];
+                if (isTypeIdenticalTo(t, type)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        /**
+         * Return a new union or intersection type computed by removing a given set of types
+         * from a given union or intersection type.
+         */
+        function removeTypesFromUnionOrIntersection(type, typesToRemove) {
+            var reducedTypes = [];
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (!typeIdenticalToSomeType(t, typesToRemove)) {
+                    reducedTypes.push(t);
+                }
+            }
+            return type.flags & 16384 /* Union */ ? getUnionType(reducedTypes, /*noSubtypeReduction*/ true) : getIntersectionType(reducedTypes);
+        }
+        function getInferenceCandidates(context, index) {
+            var inferences = context.inferences[index];
+            return inferences.primary || inferences.secondary || emptyArray;
+        }
+        function getInferredType(context, index) {
+            var inferredType = context.inferredTypes[index];
+            var inferenceSucceeded;
+            if (!inferredType) {
+                var inferences = getInferenceCandidates(context, index);
+                if (inferences.length) {
+                    // Infer widened union or supertype, or the unknown type for no common supertype
+                    var unionOrSuperType = context.inferUnionTypes ? getUnionType(inferences) : getCommonSupertype(inferences);
+                    inferredType = unionOrSuperType ? getWidenedType(unionOrSuperType) : unknownType;
+                    inferenceSucceeded = !!unionOrSuperType;
+                }
+                else {
+                    // Infer the empty object type when no inferences were made. It is important to remember that
+                    // in this case, inference still succeeds, meaning there is no error for not having inference
+                    // candidates. An inference error only occurs when there are *conflicting* candidates, i.e.
+                    // candidates with no common supertype.
+                    inferredType = emptyObjectType;
+                    inferenceSucceeded = true;
+                }
+                context.inferredTypes[index] = inferredType;
+                // Only do the constraint check if inference succeeded (to prevent cascading errors)
+                if (inferenceSucceeded) {
+                    var constraint = getConstraintOfTypeParameter(context.typeParameters[index]);
+                    if (constraint) {
+                        var instantiatedConstraint = instantiateType(constraint, getInferenceMapper(context));
+                        if (!isTypeAssignableTo(inferredType, getTypeWithThisArgument(instantiatedConstraint, inferredType))) {
+                            context.inferredTypes[index] = inferredType = instantiatedConstraint;
+                        }
+                    }
+                }
+                else if (context.failedTypeParameterIndex === undefined || context.failedTypeParameterIndex > index) {
+                    // If inference failed, it is necessary to record the index of the failed type parameter (the one we are on).
+                    // It might be that inference has already failed on a later type parameter on a previous call to inferTypeArguments.
+                    // So if this failure is on preceding type parameter, this type parameter is the new failure index.
+                    context.failedTypeParameterIndex = index;
+                }
+            }
+            return inferredType;
+        }
+        function getInferredTypes(context) {
+            for (var i = 0; i < context.inferredTypes.length; i++) {
+                getInferredType(context, i);
+            }
+            return context.inferredTypes;
+        }
+        // EXPRESSION TYPE CHECKING
+        function getResolvedSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                links.resolvedSymbol = !ts.nodeIsMissing(node) && resolveName(node, node.text, 107455 /* Value */ | 1048576 /* ExportValue */, ts.Diagnostics.Cannot_find_name_0, node) || unknownSymbol;
+            }
+            return links.resolvedSymbol;
+        }
+        function isInTypeQuery(node) {
+            // TypeScript 1.0 spec (April 2014): 3.6.3
+            // A type query consists of the keyword typeof followed by an expression.
+            // The expression is restricted to a single identifier or a sequence of identifiers separated by periods
+            while (node) {
+                switch (node.kind) {
+                    case 158 /* TypeQuery */:
+                        return true;
+                    case 69 /* Identifier */:
+                    case 139 /* QualifiedName */:
+                        node = node.parent;
+                        continue;
+                    default:
+                        return false;
+                }
+            }
+            ts.Debug.fail("should not get here");
+        }
+        // Return the flow cache key for a "dotted name" (i.e. a sequence of identifiers
+        // separated by dots). The key consists of the id of the symbol referenced by the
+        // leftmost identifier followed by zero or more property names separated by dots.
+        // The result is undefined if the reference isn't a dotted name.
+        function getFlowCacheKey(node) {
+            if (node.kind === 69 /* Identifier */) {
+                var symbol = getResolvedSymbol(node);
+                return symbol !== unknownSymbol ? "" + getSymbolId(symbol) : undefined;
+            }
+            if (node.kind === 97 /* ThisKeyword */) {
+                return "0";
+            }
+            if (node.kind === 172 /* PropertyAccessExpression */) {
+                var key = getFlowCacheKey(node.expression);
+                return key && key + "." + node.name.text;
+            }
+            return undefined;
+        }
+        function isNullOrUndefinedLiteral(node) {
+            return node.kind === 93 /* NullKeyword */ ||
+                node.kind === 69 /* Identifier */ && getResolvedSymbol(node) === undefinedSymbol;
+        }
+        function getLeftmostIdentifierOrThis(node) {
+            switch (node.kind) {
+                case 69 /* Identifier */:
+                case 97 /* ThisKeyword */:
+                    return node;
+                case 172 /* PropertyAccessExpression */:
+                    return getLeftmostIdentifierOrThis(node.expression);
+            }
+            return undefined;
+        }
+        function isMatchingReference(source, target) {
+            if (source.kind === target.kind) {
+                switch (source.kind) {
+                    case 69 /* Identifier */:
+                        return getResolvedSymbol(source) === getResolvedSymbol(target);
+                    case 97 /* ThisKeyword */:
+                        return true;
+                    case 172 /* PropertyAccessExpression */:
+                        return source.name.text === target.name.text &&
+                            isMatchingReference(source.expression, target.expression);
+                }
+            }
+            return false;
+        }
+        function containsMatchingReference(source, target) {
+            while (source.kind === 172 /* PropertyAccessExpression */) {
+                source = source.expression;
+                if (isMatchingReference(source, target)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function isOrContainsMatchingReference(source, target) {
+            return isMatchingReference(source, target) || containsMatchingReference(source, target);
+        }
+        function hasMatchingArgument(callExpression, reference) {
+            if (callExpression.arguments) {
+                for (var _i = 0, _a = callExpression.arguments; _i < _a.length; _i++) {
+                    var argument = _a[_i];
+                    if (isOrContainsMatchingReference(reference, argument)) {
+                        return true;
+                    }
+                }
+            }
+            if (callExpression.expression.kind === 172 /* PropertyAccessExpression */ &&
+                isOrContainsMatchingReference(reference, callExpression.expression.expression)) {
+                return true;
+            }
+            return false;
+        }
+        function getFlowNodeId(flow) {
+            if (!flow.id) {
+                flow.id = nextFlowId;
+                nextFlowId++;
+            }
+            return flow.id;
+        }
+        function typeMaybeAssignableTo(source, target) {
+            if (!(source.flags & 16384 /* Union */)) {
+                return isTypeAssignableTo(source, target);
+            }
+            for (var _i = 0, _a = source.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (isTypeAssignableTo(t, target)) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        // Remove those constituent types of declaredType to which no constituent type of assignedType is assignable.
+        // For example, when a variable of type number | string | boolean is assigned a value of type number | boolean,
+        // we remove type string.
+        function getAssignmentReducedType(declaredType, assignedType) {
+            if (declaredType !== assignedType && declaredType.flags & 16384 /* Union */) {
+                var reducedTypes = ts.filter(declaredType.types, function (t) { return typeMaybeAssignableTo(assignedType, t); });
+                if (reducedTypes.length) {
+                    return reducedTypes.length === 1 ? reducedTypes[0] : getUnionType(reducedTypes);
+                }
+            }
+            return declaredType;
+        }
+        function getTypeFacts(type) {
+            var flags = type.flags;
+            if (flags & 258 /* StringLike */) {
+                return strictNullChecks ? 4079361 /* StringStrictFacts */ : 4194049 /* StringFacts */;
+            }
+            if (flags & 132 /* NumberLike */) {
+                return strictNullChecks ? 4079234 /* NumberStrictFacts */ : 4193922 /* NumberFacts */;
+            }
+            if (flags & 8 /* Boolean */) {
+                return strictNullChecks ? 4078980 /* BooleanStrictFacts */ : 4193668 /* BooleanFacts */;
+            }
+            if (flags & 80896 /* ObjectType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                return resolved.callSignatures.length || resolved.constructSignatures.length || isTypeSubtypeOf(type, globalFunctionType) ?
+                    strictNullChecks ? 1970144 /* FunctionStrictFacts */ : 4181984 /* FunctionFacts */ :
+                    strictNullChecks ? 1972176 /* ObjectStrictFacts */ : 4184016 /* ObjectFacts */;
+            }
+            if (flags & (16 /* Void */ | 32 /* Undefined */)) {
+                return 2457472 /* UndefinedFacts */;
+            }
+            if (flags & 64 /* Null */) {
+                return 2340752 /* NullFacts */;
+            }
+            if (flags & 16777216 /* ESSymbol */) {
+                return strictNullChecks ? 1981320 /* SymbolStrictFacts */ : 4193160 /* SymbolFacts */;
+            }
+            if (flags & 512 /* TypeParameter */) {
+                var constraint = getConstraintOfTypeParameter(type);
+                return constraint ? getTypeFacts(constraint) : 4194303 /* All */;
+            }
+            if (flags & 32768 /* Intersection */) {
+                return ts.reduceLeft(type.types, function (flags, type) { return flags |= getTypeFacts(type); }, 0 /* None */);
+            }
+            return 4194303 /* All */;
+        }
+        function getTypeWithFacts(type, include) {
+            if (!(type.flags & 16384 /* Union */)) {
+                return getTypeFacts(type) & include ? type : neverType;
+            }
+            var firstType;
+            var types;
+            for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                var t = _a[_i];
+                if (getTypeFacts(t) & include) {
+                    if (!firstType) {
+                        firstType = t;
+                    }
+                    else {
+                        if (!types) {
+                            types = [firstType];
+                        }
+                        types.push(t);
+                    }
+                }
+            }
+            return firstType ? types ? getUnionType(types, /*noSubtypeReduction*/ true) : firstType : neverType;
+        }
+        function getTypeWithDefault(type, defaultExpression) {
+            if (defaultExpression) {
+                var defaultType = checkExpression(defaultExpression);
+                return getUnionType([getTypeWithFacts(type, 131072 /* NEUndefined */), defaultType]);
+            }
+            return type;
+        }
+        function getTypeOfDestructuredProperty(type, name) {
+            var text = getTextOfPropertyName(name);
+            return getTypeOfPropertyOfType(type, text) ||
+                isNumericLiteralName(text) && getIndexTypeOfType(type, 1 /* Number */) ||
+                getIndexTypeOfType(type, 0 /* String */) ||
+                unknownType;
+        }
+        function getTypeOfDestructuredArrayElement(type, index) {
+            return isTupleLikeType(type) && getTypeOfPropertyOfType(type, "" + index) ||
+                checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) ||
+                unknownType;
+        }
+        function getTypeOfDestructuredSpreadElement(type) {
+            return createArrayType(checkIteratedTypeOrElementType(type, /*errorNode*/ undefined, /*allowStringInput*/ false) || unknownType);
+        }
+        function getAssignedTypeOfBinaryExpression(node) {
+            return node.parent.kind === 170 /* ArrayLiteralExpression */ || node.parent.kind === 253 /* PropertyAssignment */ ?
+                getTypeWithDefault(getAssignedType(node), node.right) :
+                checkExpression(node.right);
+        }
+        function getAssignedTypeOfArrayLiteralElement(node, element) {
+            return getTypeOfDestructuredArrayElement(getAssignedType(node), ts.indexOf(node.elements, element));
+        }
+        function getAssignedTypeOfSpreadElement(node) {
+            return getTypeOfDestructuredSpreadElement(getAssignedType(node.parent));
+        }
+        function getAssignedTypeOfPropertyAssignment(node) {
+            return getTypeOfDestructuredProperty(getAssignedType(node.parent), node.name);
+        }
+        function getAssignedTypeOfShorthandPropertyAssignment(node) {
+            return getTypeWithDefault(getAssignedTypeOfPropertyAssignment(node), node.objectAssignmentInitializer);
+        }
+        function getAssignedType(node) {
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 207 /* ForInStatement */:
+                    return stringType;
+                case 208 /* ForOfStatement */:
+                    return checkRightHandSideOfForOf(parent.expression) || unknownType;
+                case 187 /* BinaryExpression */:
+                    return getAssignedTypeOfBinaryExpression(parent);
+                case 181 /* DeleteExpression */:
+                    return undefinedType;
+                case 170 /* ArrayLiteralExpression */:
+                    return getAssignedTypeOfArrayLiteralElement(parent, node);
+                case 191 /* SpreadElementExpression */:
+                    return getAssignedTypeOfSpreadElement(parent);
+                case 253 /* PropertyAssignment */:
+                    return getAssignedTypeOfPropertyAssignment(parent);
+                case 254 /* ShorthandPropertyAssignment */:
+                    return getAssignedTypeOfShorthandPropertyAssignment(parent);
+            }
+            return unknownType;
+        }
+        function getInitialTypeOfBindingElement(node) {
+            var pattern = node.parent;
+            var parentType = getInitialType(pattern.parent);
+            var type = pattern.kind === 167 /* ObjectBindingPattern */ ?
+                getTypeOfDestructuredProperty(parentType, node.propertyName || node.name) :
+                !node.dotDotDotToken ?
+                    getTypeOfDestructuredArrayElement(parentType, ts.indexOf(pattern.elements, node)) :
+                    getTypeOfDestructuredSpreadElement(parentType);
+            return getTypeWithDefault(type, node.initializer);
+        }
+        function getTypeOfInitializer(node) {
+            // Return the cached type if one is available. If the type of the variable was inferred
+            // from its initializer, we'll already have cached the type. Otherwise we compute it now
+            // without caching such that transient types are reflected.
+            var links = getNodeLinks(node);
+            return links.resolvedType || checkExpression(node);
+        }
+        function getInitialTypeOfVariableDeclaration(node) {
+            if (node.initializer) {
+                return getTypeOfInitializer(node.initializer);
+            }
+            if (node.parent.parent.kind === 207 /* ForInStatement */) {
+                return stringType;
+            }
+            if (node.parent.parent.kind === 208 /* ForOfStatement */) {
+                return checkRightHandSideOfForOf(node.parent.parent.expression) || unknownType;
+            }
+            return unknownType;
+        }
+        function getInitialType(node) {
+            return node.kind === 218 /* VariableDeclaration */ ?
+                getInitialTypeOfVariableDeclaration(node) :
+                getInitialTypeOfBindingElement(node);
+        }
+        function getReferenceFromExpression(node) {
+            switch (node.kind) {
+                case 178 /* ParenthesizedExpression */:
+                    return getReferenceFromExpression(node.expression);
+                case 187 /* BinaryExpression */:
+                    switch (node.operatorToken.kind) {
+                        case 56 /* EqualsToken */:
+                            return getReferenceFromExpression(node.left);
+                        case 24 /* CommaToken */:
+                            return getReferenceFromExpression(node.right);
+                    }
+            }
+            return node;
+        }
+        function getFlowTypeOfReference(reference, declaredType, assumeInitialized, includeOuterFunctions) {
+            var key;
+            if (!reference.flowNode || assumeInitialized && !(declaredType.flags & 16908175 /* Narrowable */)) {
+                return declaredType;
+            }
+            var initialType = assumeInitialized ? declaredType : addTypeKind(declaredType, 32 /* Undefined */);
+            var visitedFlowStart = visitedFlowCount;
+            var result = getTypeAtFlowNode(reference.flowNode);
+            visitedFlowCount = visitedFlowStart;
+            if (reference.parent.kind === 196 /* NonNullExpression */ && getTypeWithFacts(result, 524288 /* NEUndefinedOrNull */) === neverType) {
+                return declaredType;
+            }
+            return result;
+            function getTypeAtFlowNode(flow) {
+                while (true) {
+                    if (flow.flags & 256 /* Shared */) {
+                        // We cache results of flow type resolution for shared nodes that were previously visited in
+                        // the same getFlowTypeOfReference invocation. A node is considered shared when it is the
+                        // antecedent of more than one node.
+                        for (var i = visitedFlowStart; i < visitedFlowCount; i++) {
+                            if (visitedFlowNodes[i] === flow) {
+                                return visitedFlowTypes[i];
+                            }
+                        }
+                    }
+                    var type = void 0;
+                    if (flow.flags & 16 /* Assignment */) {
+                        type = getTypeAtFlowAssignment(flow);
+                        if (!type) {
+                            flow = flow.antecedent;
+                            continue;
+                        }
+                    }
+                    else if (flow.flags & 96 /* Condition */) {
+                        type = getTypeAtFlowCondition(flow);
+                    }
+                    else if (flow.flags & 12 /* Label */) {
+                        if (flow.antecedents.length === 1) {
+                            flow = flow.antecedents[0];
+                            continue;
+                        }
+                        type = flow.flags & 4 /* BranchLabel */ ?
+                            getTypeAtFlowBranchLabel(flow) :
+                            getTypeAtFlowLoopLabel(flow);
+                    }
+                    else if (flow.flags & 2 /* Start */) {
+                        // Check if we should continue with the control flow of the containing function.
+                        var container = flow.container;
+                        if (container && includeOuterFunctions) {
+                            flow = container.flowNode;
+                            continue;
+                        }
+                        // At the top of the flow we have the initial type.
+                        type = initialType;
+                    }
+                    else {
+                        // Unreachable code errors are reported in the binding phase. Here we
+                        // simply return the declared type to reduce follow-on errors.
+                        type = declaredType;
+                    }
+                    if (flow.flags & 256 /* Shared */) {
+                        // Record visited node and the associated type in the cache.
+                        visitedFlowNodes[visitedFlowCount] = flow;
+                        visitedFlowTypes[visitedFlowCount] = type;
+                        visitedFlowCount++;
+                    }
+                    return type;
+                }
+            }
+            function getTypeAtFlowAssignment(flow) {
+                var node = flow.node;
+                // Assignments only narrow the computed type if the declared type is a union type. Thus, we
+                // only need to evaluate the assigned type if the declared type is a union type.
+                if ((node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) &&
+                    reference.kind === 69 /* Identifier */ &&
+                    getExportSymbolOfValueSymbolIfExported(getResolvedSymbol(reference)) === getSymbolOfNode(node)) {
+                    return declaredType.flags & 16384 /* Union */ ?
+                        getAssignmentReducedType(declaredType, getInitialType(node)) :
+                        declaredType;
+                }
+                // If the node is not a variable declaration or binding element, it is an identifier
+                // or a dotted name that is the target of an assignment. If we have a match, reduce
+                // the declared type by the assigned type.
+                if (isMatchingReference(reference, node)) {
+                    return declaredType.flags & 16384 /* Union */ ?
+                        getAssignmentReducedType(declaredType, getAssignedType(node)) :
+                        declaredType;
+                }
+                // We didn't have a direct match. However, if the reference is a dotted name, this
+                // may be an assignment to a left hand part of the reference. For example, for a
+                // reference 'x.y.z', we may be at an assignment to 'x.y' or 'x'. In that case,
+                // return the declared type.
+                if (containsMatchingReference(reference, node)) {
+                    return declaredType;
+                }
+                // Assignment doesn't affect reference
+                return undefined;
+            }
+            function getTypeAtFlowCondition(flow) {
+                var type = getTypeAtFlowNode(flow.antecedent);
+                if (type !== neverType) {
+                    // If we have an antecedent type (meaning we're reachable in some way), we first
+                    // attempt to narrow the antecedent type. If that produces the nothing type, then
+                    // we take the type guard as an indication that control could reach here in a
+                    // manner not understood by the control flow analyzer (e.g. a function argument
+                    // has an invalid type, or a nested function has possibly made an assignment to a
+                    // captured variable). We proceed by reverting to the declared type and then
+                    // narrow that.
+                    var assumeTrue = (flow.flags & 32 /* TrueCondition */) !== 0;
+                    type = narrowType(type, flow.expression, assumeTrue);
+                    if (type === neverType) {
+                        type = narrowType(declaredType, flow.expression, assumeTrue);
+                    }
+                }
+                return type;
+            }
+            function getTypeAtFlowBranchLabel(flow) {
+                var antecedentTypes = [];
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    var type = getTypeAtFlowNode(antecedent);
+                    // If the type at a particular antecedent path is the declared type and the
+                    // reference is known to always be assigned (i.e. when declared and initial types
+                    // are the same), there is no reason to process more antecedents since the only
+                    // possible outcome is subtypes that will be removed in the final union type anyway.
+                    if (type === declaredType && declaredType === initialType) {
+                        return type;
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                }
+                return getUnionType(antecedentTypes);
+            }
+            function getTypeAtFlowLoopLabel(flow) {
+                // If we have previously computed the control flow type for the reference at
+                // this flow loop junction, return the cached type.
+                var id = getFlowNodeId(flow);
+                var cache = flowLoopCaches[id] || (flowLoopCaches[id] = {});
+                if (!key) {
+                    key = getFlowCacheKey(reference);
+                }
+                if (cache[key]) {
+                    return cache[key];
+                }
+                // If this flow loop junction and reference are already being processed, return
+                // the union of the types computed for each branch so far. We should never see
+                // an empty array here because the first antecedent of a loop junction is always
+                // the non-looping control flow path that leads to the top.
+                for (var i = flowLoopStart; i < flowLoopCount; i++) {
+                    if (flowLoopNodes[i] === flow && flowLoopKeys[i] === key) {
+                        return getUnionType(flowLoopTypes[i]);
+                    }
+                }
+                // Add the flow loop junction and reference to the in-process stack and analyze
+                // each antecedent code path.
+                var antecedentTypes = [];
+                flowLoopNodes[flowLoopCount] = flow;
+                flowLoopKeys[flowLoopCount] = key;
+                flowLoopTypes[flowLoopCount] = antecedentTypes;
+                for (var _i = 0, _a = flow.antecedents; _i < _a.length; _i++) {
+                    var antecedent = _a[_i];
+                    flowLoopCount++;
+                    var type = getTypeAtFlowNode(antecedent);
+                    flowLoopCount--;
+                    // If we see a value appear in the cache it is a sign that control flow  analysis
+                    // was restarted and completed by checkExpressionCached. We can simply pick up
+                    // the resulting type and bail out.
+                    if (cache[key]) {
+                        return cache[key];
+                    }
+                    if (!ts.contains(antecedentTypes, type)) {
+                        antecedentTypes.push(type);
+                    }
+                    // If the type at a particular antecedent path is the declared type there is no
+                    // reason to process more antecedents since the only possible outcome is subtypes
+                    // that will be removed in the final union type anyway.
+                    if (type === declaredType) {
+                        break;
+                    }
+                }
+                return cache[key] = getUnionType(antecedentTypes);
+            }
+            function narrowTypeByTruthiness(type, expr, assumeTrue) {
+                return isMatchingReference(reference, expr) ? getTypeWithFacts(type, assumeTrue ? 1048576 /* Truthy */ : 2097152 /* Falsy */) : type;
+            }
+            function narrowTypeByBinaryExpression(type, expr, assumeTrue) {
+                switch (expr.operatorToken.kind) {
+                    case 56 /* EqualsToken */:
+                        return narrowTypeByTruthiness(type, expr.left, assumeTrue);
+                    case 30 /* EqualsEqualsToken */:
+                    case 31 /* ExclamationEqualsToken */:
+                    case 32 /* EqualsEqualsEqualsToken */:
+                    case 33 /* ExclamationEqualsEqualsToken */:
+                        if (isNullOrUndefinedLiteral(expr.right)) {
+                            return narrowTypeByNullCheck(type, expr, assumeTrue);
+                        }
+                        if (expr.left.kind === 182 /* TypeOfExpression */ && expr.right.kind === 9 /* StringLiteral */) {
+                            return narrowTypeByTypeof(type, expr, assumeTrue);
+                        }
+                        break;
+                    case 91 /* InstanceOfKeyword */:
+                        return narrowTypeByInstanceof(type, expr, assumeTrue);
+                    case 24 /* CommaToken */:
+                        return narrowType(type, expr.right, assumeTrue);
+                }
+                return type;
+            }
+            function narrowTypeByNullCheck(type, expr, assumeTrue) {
+                // We have '==', '!=', '===', or '!==' operator with 'null' or 'undefined' on the right
+                var operator = expr.operatorToken.kind;
+                if (operator === 31 /* ExclamationEqualsToken */ || operator === 33 /* ExclamationEqualsEqualsToken */) {
+                    assumeTrue = !assumeTrue;
+                }
+                if (!strictNullChecks || !isMatchingReference(reference, getReferenceFromExpression(expr.left))) {
+                    return type;
+                }
+                var doubleEquals = operator === 30 /* EqualsEqualsToken */ || operator === 31 /* ExclamationEqualsToken */;
+                var facts = doubleEquals ?
+                    assumeTrue ? 65536 /* EQUndefinedOrNull */ : 524288 /* NEUndefinedOrNull */ :
+                    expr.right.kind === 93 /* NullKeyword */ ?
+                        assumeTrue ? 32768 /* EQNull */ : 262144 /* NENull */ :
+                        assumeTrue ? 16384 /* EQUndefined */ : 131072 /* NEUndefined */;
+                return getTypeWithFacts(type, facts);
+            }
+            function narrowTypeByTypeof(type, expr, assumeTrue) {
+                // We have '==', '!=', '====', or !==' operator with 'typeof xxx' on the left
+                // and string literal on the right
+                var left = getReferenceFromExpression(expr.left.expression);
+                var right = expr.right;
+                if (!isMatchingReference(reference, left)) {
+                    // For a reference of the form 'x.y', a 'typeof x === ...' type guard resets the
+                    // narrowed type of 'y' to its declared type.
+                    if (containsMatchingReference(reference, left)) {
+                        return declaredType;
+                    }
+                    return type;
+                }
+                if (expr.operatorToken.kind === 31 /* ExclamationEqualsToken */ ||
+                    expr.operatorToken.kind === 33 /* ExclamationEqualsEqualsToken */) {
+                    assumeTrue = !assumeTrue;
+                }
+                if (assumeTrue && !(type.flags & 16384 /* Union */)) {
+                    // We narrow a non-union type to an exact primitive type if the non-union type
+                    // is a supertype of that primtive type. For example, type 'any' can be narrowed
+                    // to one of the primitive types.
+                    var targetType = ts.getProperty(typeofTypesByName, right.text);
+                    if (targetType && isTypeSubtypeOf(targetType, type)) {
+                        return targetType;
+                    }
+                }
+                var facts = assumeTrue ?
+                    ts.getProperty(typeofEQFacts, right.text) || 64 /* TypeofEQHostObject */ :
+                    ts.getProperty(typeofNEFacts, right.text) || 8192 /* TypeofNEHostObject */;
+                return getTypeWithFacts(type, facts);
+            }
+            function narrowTypeByInstanceof(type, expr, assumeTrue) {
+                var left = getReferenceFromExpression(expr.left);
+                if (!isMatchingReference(reference, left)) {
+                    // For a reference of the form 'x.y', an 'x instanceof T' type guard resets the
+                    // narrowed type of 'y' to its declared type.
+                    if (containsMatchingReference(reference, left)) {
+                        return declaredType;
+                    }
+                    return type;
+                }
+                // We never narrow type any in an instanceof guard
+                if (isTypeAny(type)) {
+                    return type;
+                }
+                // Check that right operand is a function type with a prototype property
+                var rightType = checkExpression(expr.right);
+                if (!isTypeSubtypeOf(rightType, globalFunctionType)) {
+                    return type;
+                }
+                var targetType;
+                var prototypeProperty = getPropertyOfType(rightType, "prototype");
+                if (prototypeProperty) {
+                    // Target type is type of the prototype property
+                    var prototypePropertyType = getTypeOfSymbol(prototypeProperty);
+                    if (!isTypeAny(prototypePropertyType)) {
+                        targetType = prototypePropertyType;
+                    }
+                }
+                if (!targetType) {
+                    // Target type is type of construct signature
+                    var constructSignatures = void 0;
+                    if (rightType.flags & 2048 /* Interface */) {
+                        constructSignatures = resolveDeclaredMembers(rightType).declaredConstructSignatures;
+                    }
+                    else if (rightType.flags & 65536 /* Anonymous */) {
+                        constructSignatures = getSignaturesOfType(rightType, 1 /* Construct */);
+                    }
+                    if (constructSignatures && constructSignatures.length) {
+                        targetType = getUnionType(ts.map(constructSignatures, function (signature) { return getReturnTypeOfSignature(getErasedSignature(signature)); }));
+                    }
+                }
+                if (targetType) {
+                    return getNarrowedType(type, targetType, assumeTrue);
+                }
+                return type;
+            }
+            function getNarrowedType(type, candidate, assumeTrue) {
+                if (!assumeTrue) {
+                    return type.flags & 16384 /* Union */ ?
+                        getUnionType(ts.filter(type.types, function (t) { return !isTypeSubtypeOf(t, candidate); })) :
+                        type;
+                }
+                // If the current type is a union type, remove all constituents that aren't assignable to
+                // the candidate type. If one or more constituents remain, return a union of those.
+                if (type.flags & 16384 /* Union */) {
+                    var assignableConstituents = ts.filter(type.types, function (t) { return isTypeAssignableTo(t, candidate); });
+                    if (assignableConstituents.length) {
+                        return getUnionType(assignableConstituents);
+                    }
+                }
+                // If the candidate type is assignable to the target type, narrow to the candidate type.
+                // Otherwise, if the current type is assignable to the candidate, keep the current type.
+                // Otherwise, the types are completely unrelated, so narrow to the empty type.
+                var targetType = type.flags & 512 /* TypeParameter */ ? getApparentType(type) : type;
+                return isTypeAssignableTo(candidate, targetType) ? candidate :
+                    isTypeAssignableTo(type, candidate) ? type :
+                        getIntersectionType([type, candidate]);
+            }
+            function narrowTypeByTypePredicate(type, callExpression, assumeTrue) {
+                if (type.flags & 1 /* Any */ || !hasMatchingArgument(callExpression, reference)) {
+                    return type;
+                }
+                var signature = getResolvedSignature(callExpression);
+                var predicate = signature.typePredicate;
+                if (!predicate) {
+                    return type;
+                }
+                if (ts.isIdentifierTypePredicate(predicate)) {
+                    var predicateArgument = callExpression.arguments[predicate.parameterIndex];
+                    if (predicateArgument) {
+                        if (isMatchingReference(reference, predicateArgument)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue);
+                        }
+                        if (containsMatchingReference(reference, predicateArgument)) {
+                            return declaredType;
+                        }
+                    }
+                }
+                else {
+                    var invokedExpression = skipParenthesizedNodes(callExpression.expression);
+                    if (invokedExpression.kind === 173 /* ElementAccessExpression */ || invokedExpression.kind === 172 /* PropertyAccessExpression */) {
+                        var accessExpression = invokedExpression;
+                        var possibleReference = skipParenthesizedNodes(accessExpression.expression);
+                        if (isMatchingReference(reference, possibleReference)) {
+                            return getNarrowedType(type, predicate.type, assumeTrue);
+                        }
+                        if (containsMatchingReference(reference, possibleReference)) {
+                            return declaredType;
+                        }
+                    }
+                }
+                return type;
+            }
+            // Narrow the given type based on the given expression having the assumed boolean value. The returned type
+            // will be a subtype or the same type as the argument.
+            function narrowType(type, expr, assumeTrue) {
+                switch (expr.kind) {
+                    case 69 /* Identifier */:
+                    case 97 /* ThisKeyword */:
+                    case 172 /* PropertyAccessExpression */:
+                        return narrowTypeByTruthiness(type, expr, assumeTrue);
+                    case 174 /* CallExpression */:
+                        return narrowTypeByTypePredicate(type, expr, assumeTrue);
+                    case 178 /* ParenthesizedExpression */:
+                        return narrowType(type, expr.expression, assumeTrue);
+                    case 187 /* BinaryExpression */:
+                        return narrowTypeByBinaryExpression(type, expr, assumeTrue);
+                    case 185 /* PrefixUnaryExpression */:
+                        if (expr.operator === 49 /* ExclamationToken */) {
+                            return narrowType(type, expr.operand, !assumeTrue);
+                        }
+                        break;
+                }
+                return type;
+            }
+        }
+        function getTypeOfSymbolAtLocation(symbol, location) {
+            // If we have an identifier or a property access at the given location, if the location is
+            // an dotted name expression, and if the location is not an assignment target, obtain the type
+            // of the expression (which will reflect control flow analysis). If the expression indeed
+            // resolved to the given symbol, return the narrowed type.
+            if (location.kind === 69 /* Identifier */) {
+                if (ts.isRightSideOfQualifiedNameOrPropertyAccess(location)) {
+                    location = location.parent;
+                }
+                if (ts.isExpression(location) && !ts.isAssignmentTarget(location)) {
+                    var type = checkExpression(location);
+                    if (getExportSymbolOfValueSymbolIfExported(getNodeLinks(location).resolvedSymbol) === symbol) {
+                        return type;
+                    }
+                }
+            }
+            // The location isn't a reference to the given symbol, meaning we're being asked
+            // a hypothetical question of what type the symbol would have if there was a reference
+            // to it at the given location. Since we have no control flow information for the
+            // hypotherical reference (control flow information is created and attached by the
+            // binder), we simply return the declared type of the symbol.
+            return getTypeOfSymbol(symbol);
+        }
+        function skipParenthesizedNodes(expression) {
+            while (expression.kind === 178 /* ParenthesizedExpression */) {
+                expression = expression.expression;
+            }
+            return expression;
+        }
+        function getControlFlowContainer(node) {
+            while (true) {
+                node = node.parent;
+                if (ts.isFunctionLike(node) || node.kind === 226 /* ModuleBlock */ || node.kind === 256 /* SourceFile */ || node.kind === 145 /* PropertyDeclaration */) {
+                    return node;
+                }
+            }
+        }
+        function isDeclarationIncludedInFlow(reference, declaration, includeOuterFunctions) {
+            var declarationContainer = getControlFlowContainer(declaration);
+            var container = getControlFlowContainer(reference);
+            while (container !== declarationContainer &&
+                (container.kind === 179 /* FunctionExpression */ || container.kind === 180 /* ArrowFunction */) &&
+                (includeOuterFunctions || ts.getImmediatelyInvokedFunctionExpression(container))) {
+                container = getControlFlowContainer(container);
+            }
+            return container === declarationContainer;
+        }
+        function checkIdentifier(node) {
+            var symbol = getResolvedSymbol(node);
+            // As noted in ECMAScript 6 language spec, arrow functions never have an arguments objects.
+            // Although in down-level emit of arrow function, we emit it using function expression which means that
+            // arguments objects will be bound to the inner object; emitting arrow function natively in ES6, arguments objects
+            // will be bound to non-arrow function that contain this arrow function. This results in inconsistent behavior.
+            // To avoid that we will give an error to users if they use arguments objects in arrow function so that they
+            // can explicitly bound arguments objects
+            if (symbol === argumentsSymbol) {
+                var container = ts.getContainingFunction(node);
+                if (container.kind === 180 /* ArrowFunction */) {
+                    if (languageVersion < 2 /* ES6 */) {
+                        error(node, ts.Diagnostics.The_arguments_object_cannot_be_referenced_in_an_arrow_function_in_ES3_and_ES5_Consider_using_a_standard_function_expression);
+                    }
+                }
+                if (node.flags & 33554432 /* AwaitContext */) {
+                    getNodeLinks(container).flags |= 8192 /* CaptureArguments */;
+                }
+            }
+            if (symbol.flags & 8388608 /* Alias */ && !isInTypeQuery(node) && !isConstEnumOrConstEnumOnlyModule(resolveAlias(symbol))) {
+                markAliasSymbolAsReferenced(symbol);
+            }
+            var localOrExportSymbol = getExportSymbolOfValueSymbolIfExported(symbol);
+            // Due to the emit for class decorators, any reference to the class from inside of the class body
+            // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
+            // behavior of class names in ES6.
+            if (languageVersion === 2 /* ES6 */
+                && localOrExportSymbol.flags & 32 /* Class */
+                && localOrExportSymbol.valueDeclaration.kind === 221 /* ClassDeclaration */
+                && ts.nodeIsDecorated(localOrExportSymbol.valueDeclaration)) {
+                var container = ts.getContainingClass(node);
+                while (container !== undefined) {
+                    if (container === localOrExportSymbol.valueDeclaration && container.name !== node) {
+                        getNodeLinks(container).flags |= 524288 /* ClassWithBodyScopedClassBinding */;
+                        getNodeLinks(node).flags |= 1048576 /* BodyScopedClassBinding */;
+                        break;
+                    }
+                    container = ts.getContainingClass(container);
+                }
+            }
+            checkCollisionWithCapturedSuperVariable(node, node);
+            checkCollisionWithCapturedThisVariable(node, node);
+            checkNestedBlockScopedBinding(node, symbol);
+            var type = getTypeOfSymbol(localOrExportSymbol);
+            if (!(localOrExportSymbol.flags & 3 /* Variable */) || ts.isAssignmentTarget(node)) {
+                return type;
+            }
+            var declaration = localOrExportSymbol.valueDeclaration;
+            var includeOuterFunctions = isReadonlySymbol(localOrExportSymbol);
+            var assumeInitialized = !strictNullChecks || (type.flags & 1 /* Any */) !== 0 || !declaration ||
+                ts.getRootDeclaration(declaration).kind === 142 /* Parameter */ || ts.isInAmbientContext(declaration) ||
+                !isDeclarationIncludedInFlow(node, declaration, includeOuterFunctions);
+            var flowType = getFlowTypeOfReference(node, type, assumeInitialized, includeOuterFunctions);
+            if (!assumeInitialized && !(getCombinedTypeFlags(type) & 32 /* Undefined */) && getCombinedTypeFlags(flowType) & 32 /* Undefined */) {
+                error(node, ts.Diagnostics.Variable_0_is_used_before_being_assigned, symbolToString(symbol));
+                // Return the declared type to reduce follow-on errors
+                return type;
+            }
+            return flowType;
+        }
+        function isInsideFunction(node, threshold) {
+            var current = node;
+            while (current && current !== threshold) {
+                if (ts.isFunctionLike(current)) {
+                    return true;
+                }
+                current = current.parent;
+            }
+            return false;
+        }
+        function checkNestedBlockScopedBinding(node, symbol) {
+            if (languageVersion >= 2 /* ES6 */ ||
+                (symbol.flags & (2 /* BlockScopedVariable */ | 32 /* Class */)) === 0 ||
+                symbol.valueDeclaration.parent.kind === 252 /* CatchClause */) {
+                return;
+            }
+            // 1. walk from the use site up to the declaration and check
+            // if there is anything function like between declaration and use-site (is binding/class is captured in function).
+            // 2. walk from the declaration up to the boundary of lexical environment and check
+            // if there is an iteration statement in between declaration and boundary (is binding/class declared inside iteration statement)
+            var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+            var usedInFunction = isInsideFunction(node.parent, container);
+            var current = container;
+            var containedInIterationStatement = false;
+            while (current && !ts.nodeStartsNewLexicalEnvironment(current)) {
+                if (ts.isIterationStatement(current, /*lookInLabeledStatements*/ false)) {
+                    containedInIterationStatement = true;
+                    break;
+                }
+                current = current.parent;
+            }
+            if (containedInIterationStatement) {
+                if (usedInFunction) {
+                    // mark iteration statement as containing block-scoped binding captured in some function
+                    getNodeLinks(current).flags |= 65536 /* LoopWithCapturedBlockScopedBinding */;
+                }
+                // mark variables that are declared in loop initializer and reassigned inside the body of ForStatement.
+                // if body of ForStatement will be converted to function then we'll need a extra machinery to propagate reassigned values back.
+                if (container.kind === 206 /* ForStatement */ &&
+                    ts.getAncestor(symbol.valueDeclaration, 219 /* VariableDeclarationList */).parent === container &&
+                    isAssignedInBodyOfForStatement(node, container)) {
+                    getNodeLinks(symbol.valueDeclaration).flags |= 2097152 /* NeedsLoopOutParameter */;
+                }
+                // set 'declared inside loop' bit on the block-scoped binding
+                getNodeLinks(symbol.valueDeclaration).flags |= 262144 /* BlockScopedBindingInLoop */;
+            }
+            if (usedInFunction) {
+                getNodeLinks(symbol.valueDeclaration).flags |= 131072 /* CapturedBlockScopedBinding */;
+            }
+        }
+        function isAssignedInBodyOfForStatement(node, container) {
+            var current = node;
+            // skip parenthesized nodes
+            while (current.parent.kind === 178 /* ParenthesizedExpression */) {
+                current = current.parent;
+            }
+            // check if node is used as LHS in some assignment expression
+            var isAssigned = false;
+            if (ts.isAssignmentTarget(current)) {
+                isAssigned = true;
+            }
+            else if ((current.parent.kind === 185 /* PrefixUnaryExpression */ || current.parent.kind === 186 /* PostfixUnaryExpression */)) {
+                var expr = current.parent;
+                isAssigned = expr.operator === 41 /* PlusPlusToken */ || expr.operator === 42 /* MinusMinusToken */;
+            }
+            if (!isAssigned) {
+                return false;
+            }
+            // at this point we know that node is the target of assignment
+            // now check that modification happens inside the statement part of the ForStatement
+            while (current !== container) {
+                if (current === container.statement) {
+                    return true;
+                }
+                else {
+                    current = current.parent;
+                }
+            }
+            return false;
+        }
+        function captureLexicalThis(node, container) {
+            getNodeLinks(node).flags |= 2 /* LexicalThis */;
+            if (container.kind === 145 /* PropertyDeclaration */ || container.kind === 148 /* Constructor */) {
+                var classNode = container.parent;
+                getNodeLinks(classNode).flags |= 4 /* CaptureThis */;
+            }
+            else {
+                getNodeLinks(container).flags |= 4 /* CaptureThis */;
+            }
+        }
+        function findFirstSuperCall(n) {
+            if (ts.isSuperCallExpression(n)) {
+                return n;
+            }
+            else if (ts.isFunctionLike(n)) {
+                return undefined;
+            }
+            return ts.forEachChild(n, findFirstSuperCall);
+        }
+        /**
+         * Return a cached result if super-statement is already found.
+         * Otherwise, find a super statement in a given constructor function and cache the result in the node-links of the constructor
+         *
+         * @param constructor constructor-function to look for super statement
+         */
+        function getSuperCallInConstructor(constructor) {
+            var links = getNodeLinks(constructor);
+            // Only trying to find super-call if we haven't yet tried to find one.  Once we try, we will record the result
+            if (links.hasSuperCall === undefined) {
+                links.superCall = findFirstSuperCall(constructor.body);
+                links.hasSuperCall = links.superCall ? true : false;
+            }
+            return links.superCall;
+        }
+        /**
+         * Check if the given class-declaration extends null then return true.
+         * Otherwise, return false
+         * @param classDecl a class declaration to check if it extends null
+         */
+        function classDeclarationExtendsNull(classDecl) {
+            var classSymbol = getSymbolOfNode(classDecl);
+            var classInstanceType = getDeclaredTypeOfSymbol(classSymbol);
+            var baseConstructorType = getBaseConstructorTypeOfClass(classInstanceType);
+            return baseConstructorType === nullWideningType;
+        }
+        function checkThisExpression(node) {
+            // Stop at the first arrow function so that we can
+            // tell whether 'this' needs to be captured.
+            var container = ts.getThisContainer(node, /* includeArrowFunctions */ true);
+            var needToCaptureLexicalThis = false;
+            if (container.kind === 148 /* Constructor */) {
+                var containingClassDecl = container.parent;
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(containingClassDecl);
+                // If a containing class does not have extends clause or the class extends null
+                // skip checking whether super statement is called before "this" accessing.
+                if (baseTypeNode && !classDeclarationExtendsNull(containingClassDecl)) {
+                    var superCall = getSuperCallInConstructor(container);
+                    // We should give an error in the following cases:
+                    //      - No super-call
+                    //      - "this" is accessing before super-call.
+                    //          i.e super(this)
+                    //              this.x; super();
+                    // We want to make sure that super-call is done before accessing "this" so that
+                    // "this" is not accessed as a parameter of the super-call.
+                    if (!superCall || superCall.end > node.pos) {
+                        // In ES6, super inside constructor of class-declaration has to precede "this" accessing
+                        error(node, ts.Diagnostics.super_must_be_called_before_accessing_this_in_the_constructor_of_a_derived_class);
+                    }
+                }
+            }
+            // Now skip arrow functions to get the "real" owner of 'this'.
+            if (container.kind === 180 /* ArrowFunction */) {
+                container = ts.getThisContainer(container, /* includeArrowFunctions */ false);
+                // When targeting es6, arrow function lexically bind "this" so we do not need to do the work of binding "this" in emitted code
+                needToCaptureLexicalThis = (languageVersion < 2 /* ES6 */);
+            }
+            switch (container.kind) {
+                case 225 /* ModuleDeclaration */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_module_or_namespace_body);
+                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
+                    break;
+                case 224 /* EnumDeclaration */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                    // do not return here so in case if lexical this is captured - it will be reflected in flags on NodeLinks
+                    break;
+                case 148 /* Constructor */:
+                    if (isInConstructorArgumentInitializer(node, container)) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_constructor_arguments);
+                    }
+                    break;
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                    if (container.flags & 32 /* Static */) {
+                        error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_static_property_initializer);
+                    }
+                    break;
+                case 140 /* ComputedPropertyName */:
+                    error(node, ts.Diagnostics.this_cannot_be_referenced_in_a_computed_property_name);
+                    break;
+            }
+            if (needToCaptureLexicalThis) {
+                captureLexicalThis(node, container);
+            }
+            if (ts.isFunctionLike(container) &&
+                (!isInParameterInitializerBeforeContainingFunction(node) || getFunctionLikeThisParameter(container))) {
+                // Note: a parameter initializer should refer to class-this unless function-this is explicitly annotated.
+                // If this is a function in a JS file, it might be a class method. Check if it's the RHS
+                // of a x.prototype.y = function [name]() { .... }
+                if (container.kind === 179 /* FunctionExpression */ &&
+                    ts.isInJavaScriptFile(container.parent) &&
+                    ts.getSpecialPropertyAssignmentKind(container.parent) === 3 /* PrototypeProperty */) {
+                    // Get the 'x' of 'x.prototype.y = f' (here, 'f' is 'container')
+                    var className = container.parent // x.prototype.y = f
+                        .left // x.prototype.y
+                        .expression // x.prototype
+                        .expression; // x
+                    var classSymbol = checkExpression(className).symbol;
+                    if (classSymbol && classSymbol.members && (classSymbol.flags & 16 /* Function */)) {
+                        return getInferredClassType(classSymbol);
+                    }
+                }
+                var type = getContextuallyTypedThisType(container);
+                if (type) {
+                    return type;
+                }
+                var signature = getSignatureFromDeclaration(container);
+                if (signature.thisType) {
+                    return signature.thisType;
+                }
+            }
+            if (ts.isClassLike(container.parent)) {
+                var symbol = getSymbolOfNode(container.parent);
+                var type = container.flags & 32 /* Static */ ? getTypeOfSymbol(symbol) : getDeclaredTypeOfSymbol(symbol).thisType;
+                return getFlowTypeOfReference(node, type, /*assumeInitialized*/ true, /*includeOuterFunctions*/ true);
+            }
+            if (ts.isInJavaScriptFile(node)) {
+                var type = getTypeForThisExpressionFromJSDoc(container);
+                if (type && type !== unknownType) {
+                    return type;
+                }
+            }
+            if (compilerOptions.noImplicitThis) {
+                // With noImplicitThis, functions may not reference 'this' if it has type 'any'
+                error(node, ts.Diagnostics.this_implicitly_has_type_any_because_it_does_not_have_a_type_annotation);
+            }
+            return anyType;
+        }
+        function getTypeForThisExpressionFromJSDoc(node) {
+            var typeTag = ts.getJSDocTypeTag(node);
+            if (typeTag && typeTag.typeExpression && typeTag.typeExpression.type && typeTag.typeExpression.type.kind === 269 /* JSDocFunctionType */) {
+                var jsDocFunctionType = typeTag.typeExpression.type;
+                if (jsDocFunctionType.parameters.length > 0 && jsDocFunctionType.parameters[0].type.kind === 272 /* JSDocThisType */) {
+                    return getTypeFromTypeNode(jsDocFunctionType.parameters[0].type);
+                }
+            }
+        }
+        function isInConstructorArgumentInitializer(node, constructorDecl) {
+            for (var n = node; n && n !== constructorDecl; n = n.parent) {
+                if (n.kind === 142 /* Parameter */) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkSuperExpression(node) {
+            var isCallExpression = node.parent.kind === 174 /* CallExpression */ && node.parent.expression === node;
+            var container = ts.getSuperContainer(node, /*stopOnFunctions*/ true);
+            var needToCaptureLexicalThis = false;
+            if (!isCallExpression) {
+                // adjust the container reference in case if super is used inside arrow functions with arbitrary deep nesting
+                while (container && container.kind === 180 /* ArrowFunction */) {
+                    container = ts.getSuperContainer(container, /*stopOnFunctions*/ true);
+                    needToCaptureLexicalThis = languageVersion < 2 /* ES6 */;
+                }
+            }
+            var canUseSuperExpression = isLegalUsageOfSuperExpression(container);
+            var nodeCheckFlag = 0;
+            if (!canUseSuperExpression) {
+                // issue more specific error if super is used in computed property name
+                // class A { foo() { return "1" }}
+                // class B {
+                //     [super.foo()]() {}
+                // }
+                var current = node;
+                while (current && current !== container && current.kind !== 140 /* ComputedPropertyName */) {
+                    current = current.parent;
+                }
+                if (current && current.kind === 140 /* ComputedPropertyName */) {
+                    error(node, ts.Diagnostics.super_cannot_be_referenced_in_a_computed_property_name);
+                }
+                else if (isCallExpression) {
+                    error(node, ts.Diagnostics.Super_calls_are_not_permitted_outside_constructors_or_in_nested_functions_inside_constructors);
+                }
+                else if (!container || !container.parent || !(ts.isClassLike(container.parent) || container.parent.kind === 171 /* ObjectLiteralExpression */)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_members_of_derived_classes_or_object_literal_expressions);
+                }
+                else {
+                    error(node, ts.Diagnostics.super_property_access_is_permitted_only_in_a_constructor_member_function_or_member_accessor_of_a_derived_class);
+                }
+                return unknownType;
+            }
+            if ((container.flags & 32 /* Static */) || isCallExpression) {
+                nodeCheckFlag = 512 /* SuperStatic */;
+            }
+            else {
+                nodeCheckFlag = 256 /* SuperInstance */;
+            }
+            getNodeLinks(node).flags |= nodeCheckFlag;
+            // Due to how we emit async functions, we need to specialize the emit for an async method that contains a `super` reference.
+            // This is due to the fact that we emit the body of an async function inside of a generator function. As generator
+            // functions cannot reference `super`, we emit a helper inside of the method body, but outside of the generator. This helper
+            // uses an arrow function, which is permitted to reference `super`.
+            //
+            // There are two primary ways we can access `super` from within an async method. The first is getting the value of a property
+            // or indexed access on super, either as part of a right-hand-side expression or call expression. The second is when setting the value
+            // of a property or indexed access, either as part of an assignment expression or destructuring assignment.
+            //
+            // The simplest case is reading a value, in which case we will emit something like the following:
+            //
+            //  // ts
+            //  ...
+            //  async asyncMethod() {
+            //    let x = await super.asyncMethod();
+            //    return x;
+            //  }
+            //  ...
+            //
+            //  // js
+            //  ...
+            //  asyncMethod() {
+            //      const _super = name => super[name];
+            //      return __awaiter(this, arguments, Promise, function *() {
+            //          let x = yield _super("asyncMethod").call(this);
+            //          return x;
+            //      });
+            //  }
+            //  ...
+            //
+            // The more complex case is when we wish to assign a value, especially as part of a destructuring assignment. As both cases
+            // are legal in ES6, but also likely less frequent, we emit the same more complex helper for both scenarios:
+            //
+            //  // ts
+            //  ...
+            //  async asyncMethod(ar: Promise<any[]>) {
+            //      [super.a, super.b] = await ar;
+            //  }
+            //  ...
+            //
+            //  // js
+            //  ...
+            //  asyncMethod(ar) {
+            //      const _super = (function (geti, seti) {
+            //          const cache = Object.create(null);
+            //          return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });
+            //      })(name => super[name], (name, value) => super[name] = value);
+            //      return __awaiter(this, arguments, Promise, function *() {
+            //          [_super("a").value, _super("b").value] = yield ar;
+            //      });
+            //  }
+            //  ...
+            //
+            // This helper creates an object with a "value" property that wraps the `super` property or indexed access for both get and set.
+            // This is required for destructuring assignments, as a call expression cannot be used as the target of a destructuring assignment
+            // while a property access can.
+            if (container.kind === 147 /* MethodDeclaration */ && container.flags & 256 /* Async */) {
+                if (ts.isSuperPropertyOrElementAccess(node.parent) && ts.isAssignmentTarget(node.parent)) {
+                    getNodeLinks(container).flags |= 4096 /* AsyncMethodWithSuperBinding */;
+                }
+                else {
+                    getNodeLinks(container).flags |= 2048 /* AsyncMethodWithSuper */;
+                }
+            }
+            if (needToCaptureLexicalThis) {
+                // call expressions are allowed only in constructors so they should always capture correct 'this'
+                // super property access expressions can also appear in arrow functions -
+                // in this case they should also use correct lexical this
+                captureLexicalThis(node.parent, container);
+            }
+            if (container.parent.kind === 171 /* ObjectLiteralExpression */) {
+                if (languageVersion < 2 /* ES6 */) {
+                    error(node, ts.Diagnostics.super_is_only_allowed_in_members_of_object_literal_expressions_when_option_target_is_ES2015_or_higher);
+                    return unknownType;
+                }
+                else {
+                    // for object literal assume that type of 'super' is 'any'
+                    return anyType;
+                }
+            }
+            // at this point the only legal case for parent is ClassLikeDeclaration
+            var classLikeDeclaration = container.parent;
+            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(classLikeDeclaration));
+            var baseClassType = classType && getBaseTypes(classType)[0];
+            if (!baseClassType) {
+                if (!ts.getClassExtendsHeritageClauseElement(classLikeDeclaration)) {
+                    error(node, ts.Diagnostics.super_can_only_be_referenced_in_a_derived_class);
+                }
+                return unknownType;
+            }
+            if (container.kind === 148 /* Constructor */ && isInConstructorArgumentInitializer(node, container)) {
+                // issue custom error message for super property access in constructor arguments (to be aligned with old compiler)
+                error(node, ts.Diagnostics.super_cannot_be_referenced_in_constructor_arguments);
+                return unknownType;
+            }
+            return nodeCheckFlag === 512 /* SuperStatic */
+                ? getBaseConstructorTypeOfClass(classType)
+                : getTypeWithThisArgument(baseClassType, classType.thisType);
+            function isLegalUsageOfSuperExpression(container) {
+                if (!container) {
+                    return false;
+                }
+                if (isCallExpression) {
+                    // TS 1.0 SPEC (April 2014): 4.8.1
+                    // Super calls are only permitted in constructors of derived classes
+                    return container.kind === 148 /* Constructor */;
+                }
+                else {
+                    // TS 1.0 SPEC (April 2014)
+                    // 'super' property access is allowed
+                    // - In a constructor, instance member function, instance member accessor, or instance member variable initializer where this references a derived class instance
+                    // - In a static member function or static member accessor
+                    // topmost container must be something that is directly nested in the class declaration\object literal expression
+                    if (ts.isClassLike(container.parent) || container.parent.kind === 171 /* ObjectLiteralExpression */) {
+                        if (container.flags & 32 /* Static */) {
+                            return container.kind === 147 /* MethodDeclaration */ ||
+                                container.kind === 146 /* MethodSignature */ ||
+                                container.kind === 149 /* GetAccessor */ ||
+                                container.kind === 150 /* SetAccessor */;
+                        }
+                        else {
+                            return container.kind === 147 /* MethodDeclaration */ ||
+                                container.kind === 146 /* MethodSignature */ ||
+                                container.kind === 149 /* GetAccessor */ ||
+                                container.kind === 150 /* SetAccessor */ ||
+                                container.kind === 145 /* PropertyDeclaration */ ||
+                                container.kind === 144 /* PropertySignature */ ||
+                                container.kind === 148 /* Constructor */;
+                        }
+                    }
+                }
+                return false;
+            }
+        }
+        function getContextuallyTypedThisType(func) {
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func) && func.kind !== 180 /* ArrowFunction */) {
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    return contextualSignature.thisType;
+                }
+            }
+            return undefined;
+        }
+        // Return contextual type of parameter or undefined if no contextual type is available
+        function getContextuallyTypedParameterType(parameter) {
+            var func = parameter.parent;
+            if (isContextSensitiveFunctionOrObjectLiteralMethod(func)) {
+                var iife = ts.getImmediatelyInvokedFunctionExpression(func);
+                if (iife) {
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (iife.arguments && indexOfParameter < iife.arguments.length) {
+                        if (parameter.dotDotDotToken) {
+                            var restTypes = [];
+                            for (var i = indexOfParameter; i < iife.arguments.length; i++) {
+                                restTypes.push(getTypeOfExpression(iife.arguments[i]));
+                            }
+                            return createArrayType(getUnionType(restTypes));
+                        }
+                        var links = getNodeLinks(iife);
+                        var cached = links.resolvedSignature;
+                        links.resolvedSignature = anySignature;
+                        var type = checkExpression(iife.arguments[indexOfParameter]);
+                        links.resolvedSignature = cached;
+                        return type;
+                    }
+                }
+                var contextualSignature = getContextualSignature(func);
+                if (contextualSignature) {
+                    var funcHasRestParameters = ts.hasRestParameter(func);
+                    var len = func.parameters.length - (funcHasRestParameters ? 1 : 0);
+                    var indexOfParameter = ts.indexOf(func.parameters, parameter);
+                    if (indexOfParameter < len) {
+                        return getTypeAtPosition(contextualSignature, indexOfParameter);
+                    }
+                    // If last parameter is contextually rest parameter get its type
+                    if (funcHasRestParameters &&
+                        indexOfParameter === (func.parameters.length - 1) &&
+                        isRestParameterIndex(contextualSignature, func.parameters.length - 1)) {
+                        return getTypeOfSymbol(ts.lastOrUndefined(contextualSignature.parameters));
+                    }
+                }
+            }
+            return undefined;
+        }
+        // In a variable, parameter or property declaration with a type annotation,
+        //   the contextual type of an initializer expression is the type of the variable, parameter or property.
+        // Otherwise, in a parameter declaration of a contextually typed function expression,
+        //   the contextual type of an initializer expression is the contextual type of the parameter.
+        // Otherwise, in a variable or parameter declaration with a binding pattern name,
+        //   the contextual type of an initializer expression is the type implied by the binding pattern.
+        // Otherwise, in a binding pattern inside a variable or parameter declaration,
+        //   the contextual type of an initializer expression is the type annotation of the containing declaration, if present.
+        function getContextualTypeForInitializerExpression(node) {
+            var declaration = node.parent;
+            if (node === declaration.initializer) {
+                if (declaration.type) {
+                    return getTypeFromTypeNode(declaration.type);
+                }
+                if (declaration.kind === 142 /* Parameter */) {
+                    var type = getContextuallyTypedParameterType(declaration);
+                    if (type) {
+                        return type;
+                    }
+                }
+                if (ts.isBindingPattern(declaration.name)) {
+                    return getTypeFromBindingPattern(declaration.name, /*includePatternInType*/ true);
+                }
+                if (ts.isBindingPattern(declaration.parent)) {
+                    var parentDeclaration = declaration.parent.parent;
+                    var name_12 = declaration.propertyName || declaration.name;
+                    if (ts.isVariableLike(parentDeclaration) &&
+                        parentDeclaration.type &&
+                        !ts.isBindingPattern(name_12)) {
+                        var text = getTextOfPropertyName(name_12);
+                        if (text) {
+                            return getTypeOfPropertyOfType(getTypeFromTypeNode(parentDeclaration.type), text);
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function getContextualTypeForReturnExpression(node) {
+            var func = ts.getContainingFunction(node);
+            if (ts.isAsyncFunctionLike(func)) {
+                var contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return getPromisedType(contextualReturnType);
+                }
+                return undefined;
+            }
+            if (func && !func.asteriskToken) {
+                return getContextualReturnType(func);
+            }
+            return undefined;
+        }
+        function getContextualTypeForYieldOperand(node) {
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var contextualReturnType = getContextualReturnType(func);
+                if (contextualReturnType) {
+                    return node.asteriskToken
+                        ? contextualReturnType
+                        : getElementTypeOfIterableIterator(contextualReturnType);
+                }
+            }
+            return undefined;
+        }
+        function isInParameterInitializerBeforeContainingFunction(node) {
+            while (node.parent && !ts.isFunctionLike(node.parent)) {
+                if (node.parent.kind === 142 /* Parameter */ && node.parent.initializer === node) {
+                    return true;
+                }
+                node = node.parent;
+            }
+            return false;
+        }
+        function getContextualReturnType(functionDecl) {
+            // If the containing function has a return type annotation, is a constructor, or is a get accessor whose
+            // corresponding set accessor has a type annotation, return statements in the function are contextually typed
+            if (functionDecl.type ||
+                functionDecl.kind === 148 /* Constructor */ ||
+                functionDecl.kind === 149 /* GetAccessor */ && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(functionDecl.symbol, 150 /* SetAccessor */))) {
+                return getReturnTypeOfSignature(getSignatureFromDeclaration(functionDecl));
+            }
+            // Otherwise, if the containing function is contextually typed by a function type with exactly one call signature
+            // and that call signature is non-generic, return statements are contextually typed by the return type of the signature
+            var signature = getContextualSignatureForFunctionLikeDeclaration(functionDecl);
+            if (signature) {
+                return getReturnTypeOfSignature(signature);
+            }
+            return undefined;
+        }
+        // In a typed function call, an argument or substitution expression is contextually typed by the type of the corresponding parameter.
+        function getContextualTypeForArgument(callTarget, arg) {
+            var args = getEffectiveCallArguments(callTarget);
+            var argIndex = ts.indexOf(args, arg);
+            if (argIndex >= 0) {
+                var signature = getResolvedOrAnySignature(callTarget);
+                return getTypeAtPosition(signature, argIndex);
+            }
+            return undefined;
+        }
+        function getContextualTypeForSubstitutionExpression(template, substitutionExpression) {
+            if (template.parent.kind === 176 /* TaggedTemplateExpression */) {
+                return getContextualTypeForArgument(template.parent, substitutionExpression);
+            }
+            return undefined;
+        }
+        function getContextualTypeForBinaryOperand(node) {
+            var binaryExpression = node.parent;
+            var operator = binaryExpression.operatorToken.kind;
+            if (operator >= 56 /* FirstAssignment */ && operator <= 68 /* LastAssignment */) {
+                // In an assignment expression, the right operand is contextually typed by the type of the left operand.
+                if (node === binaryExpression.right) {
+                    return checkExpression(binaryExpression.left);
+                }
+            }
+            else if (operator === 52 /* BarBarToken */) {
+                // When an || expression has a contextual type, the operands are contextually typed by that type. When an ||
+                // expression has no contextual type, the right operand is contextually typed by the type of the left operand.
+                var type = getContextualType(binaryExpression);
+                if (!type && node === binaryExpression.right) {
+                    type = checkExpression(binaryExpression.left);
+                }
+                return type;
+            }
+            else if (operator === 51 /* AmpersandAmpersandToken */ || operator === 24 /* CommaToken */) {
+                if (node === binaryExpression.right) {
+                    return getContextualType(binaryExpression);
+                }
+            }
+            return undefined;
+        }
+        // Apply a mapping function to a contextual type and return the resulting type. If the contextual type
+        // is a union type, the mapping function is applied to each constituent type and a union of the resulting
+        // types is returned.
+        function applyToContextualType(type, mapper) {
+            if (!(type.flags & 16384 /* Union */)) {
+                return mapper(type);
+            }
+            var types = type.types;
+            var mappedType;
+            var mappedTypes;
+            for (var _i = 0, types_8 = types; _i < types_8.length; _i++) {
+                var current = types_8[_i];
+                var t = mapper(current);
+                if (t) {
+                    if (!mappedType) {
+                        mappedType = t;
+                    }
+                    else if (!mappedTypes) {
+                        mappedTypes = [mappedType, t];
+                    }
+                    else {
+                        mappedTypes.push(t);
+                    }
+                }
+            }
+            return mappedTypes ? getUnionType(mappedTypes) : mappedType;
+        }
+        function getTypeOfPropertyOfContextualType(type, name) {
+            return applyToContextualType(type, function (t) {
+                var prop = t.flags & 130048 /* StructuredType */ ? getPropertyOfType(t, name) : undefined;
+                return prop ? getTypeOfSymbol(prop) : undefined;
+            });
+        }
+        function getIndexTypeOfContextualType(type, kind) {
+            return applyToContextualType(type, function (t) { return getIndexTypeOfStructuredType(t, kind); });
+        }
+        function contextualTypeIsStringLiteralType(type) {
+            return !!(type.flags & 16384 /* Union */ ? ts.forEach(type.types, isStringLiteralType) : isStringLiteralType(type));
+        }
+        // Return true if the given contextual type is a tuple-like type
+        function contextualTypeIsTupleLikeType(type) {
+            return !!(type.flags & 16384 /* Union */ ? ts.forEach(type.types, isTupleLikeType) : isTupleLikeType(type));
+        }
+        // In an object literal contextually typed by a type T, the contextual type of a property assignment is the type of
+        // the matching property in T, if one exists. Otherwise, it is the type of the numeric index signature in T, if one
+        // exists. Otherwise, it is the type of the string index signature in T, if one exists.
+        function getContextualTypeForObjectLiteralMethod(node) {
+            ts.Debug.assert(ts.isObjectLiteralMethod(node));
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
+            }
+            return getContextualTypeForObjectLiteralElement(node);
+        }
+        function getContextualTypeForObjectLiteralElement(element) {
+            var objectLiteral = element.parent;
+            var type = getApparentTypeOfContextualType(objectLiteral);
+            if (type) {
+                if (!ts.hasDynamicName(element)) {
+                    // For a (non-symbol) computed property, there is no reason to look up the name
+                    // in the type. It will just be "__computed", which does not appear in any
+                    // SymbolTable.
+                    var symbolName = getSymbolOfNode(element).name;
+                    var propertyType = getTypeOfPropertyOfContextualType(type, symbolName);
+                    if (propertyType) {
+                        return propertyType;
+                    }
+                }
+                return isNumericName(element.name) && getIndexTypeOfContextualType(type, 1 /* Number */) ||
+                    getIndexTypeOfContextualType(type, 0 /* String */);
+            }
+            return undefined;
+        }
+        // In an array literal contextually typed by a type T, the contextual type of an element expression at index N is
+        // the type of the property with the numeric name N in T, if one exists. Otherwise, if T has a numeric index signature,
+        // it is the type of the numeric index signature in T. Otherwise, in ES6 and higher, the contextual type is the iterated
+        // type of T.
+        function getContextualTypeForElementExpression(node) {
+            var arrayLiteral = node.parent;
+            var type = getApparentTypeOfContextualType(arrayLiteral);
+            if (type) {
+                var index = ts.indexOf(arrayLiteral.elements, node);
+                return getTypeOfPropertyOfContextualType(type, "" + index)
+                    || getIndexTypeOfContextualType(type, 1 /* Number */)
+                    || (languageVersion >= 2 /* ES6 */ ? getElementTypeOfIterable(type, /*errorNode*/ undefined) : undefined);
+            }
+            return undefined;
+        }
+        // In a contextually typed conditional expression, the true/false expressions are contextually typed by the same type.
+        function getContextualTypeForConditionalOperand(node) {
+            var conditional = node.parent;
+            return node === conditional.whenTrue || node === conditional.whenFalse ? getContextualType(conditional) : undefined;
+        }
+        function getContextualTypeForJsxAttribute(attribute) {
+            var kind = attribute.kind;
+            var jsxElement = attribute.parent;
+            var attrsType = getJsxElementAttributesType(jsxElement);
+            if (attribute.kind === 246 /* JsxAttribute */) {
+                if (!attrsType || isTypeAny(attrsType)) {
+                    return undefined;
+                }
+                return getTypeOfPropertyOfType(attrsType, attribute.name.text);
+            }
+            else if (attribute.kind === 247 /* JsxSpreadAttribute */) {
+                return attrsType;
+            }
+            ts.Debug.fail("Expected JsxAttribute or JsxSpreadAttribute, got ts.SyntaxKind[" + kind + "]");
+        }
+        // Return the contextual type for a given expression node. During overload resolution, a contextual type may temporarily
+        // be "pushed" onto a node using the contextualType property.
+        function getApparentTypeOfContextualType(node) {
+            var type = getContextualType(node);
+            return type && getApparentType(type);
+        }
+        /**
+         * Woah! Do you really want to use this function?
+         *
+         * Unless you're trying to get the *non-apparent* type for a
+         * value-literal type or you're authoring relevant portions of this algorithm,
+         * you probably meant to use 'getApparentTypeOfContextualType'.
+         * Otherwise this may not be very useful.
+         *
+         * In cases where you *are* working on this function, you should understand
+         * when it is appropriate to use 'getContextualType' and 'getApparentTypeOfContextualType'.
+         *
+         *   - Use 'getContextualType' when you are simply going to propagate the result to the expression.
+         *   - Use 'getApparentTypeOfContextualType' when you're going to need the members of the type.
+         *
+         * @param node the expression whose contextual type will be returned.
+         * @returns the contextual type of an expression.
+         */
+        function getContextualType(node) {
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
+            }
+            if (node.contextualType) {
+                return node.contextualType;
+            }
+            var parent = node.parent;
+            switch (parent.kind) {
+                case 218 /* VariableDeclaration */:
+                case 142 /* Parameter */:
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 169 /* BindingElement */:
+                    return getContextualTypeForInitializerExpression(node);
+                case 180 /* ArrowFunction */:
+                case 211 /* ReturnStatement */:
+                    return getContextualTypeForReturnExpression(node);
+                case 190 /* YieldExpression */:
+                    return getContextualTypeForYieldOperand(parent);
+                case 174 /* CallExpression */:
+                case 175 /* NewExpression */:
+                    return getContextualTypeForArgument(parent, node);
+                case 177 /* TypeAssertionExpression */:
+                case 195 /* AsExpression */:
+                    return getTypeFromTypeNode(parent.type);
+                case 187 /* BinaryExpression */:
+                    return getContextualTypeForBinaryOperand(node);
+                case 253 /* PropertyAssignment */:
+                    return getContextualTypeForObjectLiteralElement(parent);
+                case 170 /* ArrayLiteralExpression */:
+                    return getContextualTypeForElementExpression(node);
+                case 188 /* ConditionalExpression */:
+                    return getContextualTypeForConditionalOperand(node);
+                case 197 /* TemplateSpan */:
+                    ts.Debug.assert(parent.parent.kind === 189 /* TemplateExpression */);
+                    return getContextualTypeForSubstitutionExpression(parent.parent, node);
+                case 178 /* ParenthesizedExpression */:
+                    return getContextualType(parent);
+                case 248 /* JsxExpression */:
+                    return getContextualType(parent);
+                case 246 /* JsxAttribute */:
+                case 247 /* JsxSpreadAttribute */:
+                    return getContextualTypeForJsxAttribute(parent);
+            }
+            return undefined;
+        }
+        // If the given type is an object or union type, if that type has a single signature, and if
+        // that signature is non-generic, return the signature. Otherwise return undefined.
+        function getNonGenericSignature(type) {
+            var signatures = getSignaturesOfStructuredType(type, 0 /* Call */);
+            if (signatures.length === 1) {
+                var signature = signatures[0];
+                if (!signature.typeParameters) {
+                    return signature;
+                }
+            }
+        }
+        function isFunctionExpressionOrArrowFunction(node) {
+            return node.kind === 179 /* FunctionExpression */ || node.kind === 180 /* ArrowFunction */;
+        }
+        function getContextualSignatureForFunctionLikeDeclaration(node) {
+            // Only function expressions, arrow functions, and object literal methods are contextually typed.
+            return isFunctionExpressionOrArrowFunction(node) || ts.isObjectLiteralMethod(node)
+                ? getContextualSignature(node)
+                : undefined;
+        }
+        function getContextualTypeForFunctionLikeDeclaration(node) {
+            return ts.isObjectLiteralMethod(node) ?
+                getContextualTypeForObjectLiteralMethod(node) :
+                getApparentTypeOfContextualType(node);
+        }
+        // Return the contextual signature for a given expression node. A contextual type provides a
+        // contextual signature if it has a single call signature and if that call signature is non-generic.
+        // If the contextual type is a union type, get the signature from each type possible and if they are
+        // all identical ignoring their return type, the result is same signature but with return type as
+        // union type of return types from these signatures
+        function getContextualSignature(node) {
+            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            var type = getContextualTypeForFunctionLikeDeclaration(node);
+            if (!type) {
+                return undefined;
+            }
+            if (!(type.flags & 16384 /* Union */)) {
+                return getNonGenericSignature(type);
+            }
+            var signatureList;
+            var types = type.types;
+            for (var _i = 0, types_9 = types; _i < types_9.length; _i++) {
+                var current = types_9[_i];
+                var signature = getNonGenericSignature(current);
+                if (signature) {
+                    if (!signatureList) {
+                        // This signature will contribute to contextual union signature
+                        signatureList = [signature];
+                    }
+                    else if (!compareSignaturesIdentical(signatureList[0], signature, /*partialMatch*/ false, /*ignoreThisTypes*/ true, /*ignoreReturnTypes*/ true, compareTypesIdentical)) {
+                        // Signatures aren't identical, do not use
+                        return undefined;
+                    }
+                    else {
+                        // Use this signature for contextual union signature
+                        signatureList.push(signature);
+                    }
+                }
+            }
+            // Result is union of signatures collected (return type is union of return types of this signature set)
+            var result;
+            if (signatureList) {
+                result = cloneSignature(signatureList[0]);
+                // Clear resolved return type we possibly got from cloneSignature
+                result.resolvedReturnType = undefined;
+                result.unionSignatures = signatureList;
+            }
+            return result;
+        }
+        /**
+         * Detect if the mapper implies an inference context. Specifically, there are 4 possible values
+         * for a mapper. Let's go through each one of them:
+         *
+         *    1. undefined - this means we are not doing inferential typing, but we may do contextual typing,
+         *       which could cause us to assign a parameter a type
+         *    2. identityMapper - means we want to avoid assigning a parameter a type, whether or not we are in
+         *       inferential typing (context is undefined for the identityMapper)
+         *    3. a mapper created by createInferenceMapper - we are doing inferential typing, we want to assign
+         *       types to parameters and fix type parameters (context is defined)
+         *    4. an instantiation mapper created by createTypeMapper or createTypeEraser - this should never be
+         *       passed as the contextual mapper when checking an expression (context is undefined for these)
+         *
+         * isInferentialContext is detecting if we are in case 3
+         */
+        function isInferentialContext(mapper) {
+            return mapper && mapper.context;
+        }
+        function checkSpreadElementExpression(node, contextualMapper) {
+            // It is usually not safe to call checkExpressionCached if we can be contextually typing.
+            // You can tell that we are contextually typing because of the contextualMapper parameter.
+            // While it is true that a spread element can have a contextual type, it does not do anything
+            // with this type. It is neither affected by it, nor does it propagate it to its operand.
+            // So the fact that contextualMapper is passed is not important, because the operand of a spread
+            // element is not contextually typed.
+            var arrayOrIterableType = checkExpressionCached(node.expression, contextualMapper);
+            return checkIteratedTypeOrElementType(arrayOrIterableType, node.expression, /*allowStringInput*/ false);
+        }
+        function hasDefaultValue(node) {
+            return (node.kind === 169 /* BindingElement */ && !!node.initializer) ||
+                (node.kind === 187 /* BinaryExpression */ && node.operatorToken.kind === 56 /* EqualsToken */);
+        }
+        function checkArrayLiteral(node, contextualMapper) {
+            var elements = node.elements;
+            var hasSpreadElement = false;
+            var elementTypes = [];
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            for (var _i = 0, elements_1 = elements; _i < elements_1.length; _i++) {
+                var e = elements_1[_i];
+                if (inDestructuringPattern && e.kind === 191 /* SpreadElementExpression */) {
+                    // Given the following situation:
+                    //    var c: {};
+                    //    [...c] = ["", 0];
+                    //
+                    // c is represented in the tree as a spread element in an array literal.
+                    // But c really functions as a rest element, and its purpose is to provide
+                    // a contextual type for the right hand side of the assignment. Therefore,
+                    // instead of calling checkExpression on "...c", which will give an error
+                    // if c is not iterable/array-like, we need to act as if we are trying to
+                    // get the contextual element type from it. So we do something similar to
+                    // getContextualTypeForElementExpression, which will crucially not error
+                    // if there is no index type / iterated type.
+                    var restArrayType = checkExpression(e.expression, contextualMapper);
+                    var restElementType = getIndexTypeOfType(restArrayType, 1 /* Number */) ||
+                        (languageVersion >= 2 /* ES6 */ ? getElementTypeOfIterable(restArrayType, /*errorNode*/ undefined) : undefined);
+                    if (restElementType) {
+                        elementTypes.push(restElementType);
+                    }
+                }
+                else {
+                    var type = checkExpression(e, contextualMapper);
+                    elementTypes.push(type);
+                }
+                hasSpreadElement = hasSpreadElement || e.kind === 191 /* SpreadElementExpression */;
+            }
+            if (!hasSpreadElement) {
+                // If array literal is actually a destructuring pattern, mark it as an implied type. We do this such
+                // that we get the same behavior for "var [x, y] = []" and "[x, y] = []".
+                if (inDestructuringPattern && elementTypes.length) {
+                    var type = createNewTupleType(elementTypes);
+                    type.pattern = node;
+                    return type;
+                }
+                var contextualType = getApparentTypeOfContextualType(node);
+                if (contextualType && contextualTypeIsTupleLikeType(contextualType)) {
+                    var pattern = contextualType.pattern;
+                    // If array literal is contextually typed by a binding pattern or an assignment pattern, pad the resulting
+                    // tuple type with the corresponding binding or assignment element types to make the lengths equal.
+                    if (pattern && (pattern.kind === 168 /* ArrayBindingPattern */ || pattern.kind === 170 /* ArrayLiteralExpression */)) {
+                        var patternElements = pattern.elements;
+                        for (var i = elementTypes.length; i < patternElements.length; i++) {
+                            var patternElement = patternElements[i];
+                            if (hasDefaultValue(patternElement)) {
+                                elementTypes.push(contextualType.elementTypes[i]);
+                            }
+                            else {
+                                if (patternElement.kind !== 193 /* OmittedExpression */) {
+                                    error(patternElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                                }
+                                elementTypes.push(unknownType);
+                            }
+                        }
+                    }
+                    if (elementTypes.length) {
+                        return createTupleType(elementTypes);
+                    }
+                }
+            }
+            return createArrayType(elementTypes.length ? getUnionType(elementTypes) : strictNullChecks ? neverType : undefinedWideningType);
+        }
+        function isNumericName(name) {
+            return name.kind === 140 /* ComputedPropertyName */ ? isNumericComputedName(name) : isNumericLiteralName(name.text);
+        }
+        function isNumericComputedName(name) {
+            // It seems odd to consider an expression of type Any to result in a numeric name,
+            // but this behavior is consistent with checkIndexedAccess
+            return isTypeAnyOrAllConstituentTypesHaveKind(checkComputedPropertyName(name), 132 /* NumberLike */);
+        }
+        function isTypeAnyOrAllConstituentTypesHaveKind(type, kind) {
+            return isTypeAny(type) || isTypeOfKind(type, kind);
+        }
+        function isNumericLiteralName(name) {
+            // The intent of numeric names is that
+            //     - they are names with text in a numeric form, and that
+            //     - setting properties/indexing with them is always equivalent to doing so with the numeric literal 'numLit',
+            //         acquired by applying the abstract 'ToNumber' operation on the name's text.
+            //
+            // The subtlety is in the latter portion, as we cannot reliably say that anything that looks like a numeric literal is a numeric name.
+            // In fact, it is the case that the text of the name must be equal to 'ToString(numLit)' for this to hold.
+            //
+            // Consider the property name '"0xF00D"'. When one indexes with '0xF00D', they are actually indexing with the value of 'ToString(0xF00D)'
+            // according to the ECMAScript specification, so it is actually as if the user indexed with the string '"61453"'.
+            // Thus, the text of all numeric literals equivalent to '61543' such as '0xF00D', '0xf00D', '0170015', etc. are not valid numeric names
+            // because their 'ToString' representation is not equal to their original text.
+            // This is motivated by ECMA-262 sections 9.3.1, 9.8.1, 11.1.5, and 11.2.1.
+            //
+            // Here, we test whether 'ToString(ToNumber(name))' is exactly equal to 'name'.
+            // The '+' prefix operator is equivalent here to applying the abstract ToNumber operation.
+            // Applying the 'toString()' method on a number gives us the abstract ToString operation on a number.
+            //
+            // Note that this accepts the values 'Infinity', '-Infinity', and 'NaN', and that this is intentional.
+            // This is desired behavior, because when indexing with them as numeric entities, you are indexing
+            // with the strings '"Infinity"', '"-Infinity"', and '"NaN"' respectively.
+            return (+name).toString() === name;
+        }
+        function checkComputedPropertyName(node) {
+            var links = getNodeLinks(node.expression);
+            if (!links.resolvedType) {
+                links.resolvedType = checkExpression(node.expression);
+                // This will allow types number, string, symbol or any. It will also allow enums, the unknown
+                // type, and any union of these types (like string | number).
+                if (!isTypeAnyOrAllConstituentTypesHaveKind(links.resolvedType, 132 /* NumberLike */ | 258 /* StringLike */ | 16777216 /* ESSymbol */)) {
+                    error(node, ts.Diagnostics.A_computed_property_name_must_be_of_type_string_number_symbol_or_any);
+                }
+                else {
+                    checkThatExpressionIsProperSymbolReference(node.expression, links.resolvedType, /*reportError*/ true);
+                }
+            }
+            return links.resolvedType;
+        }
+        function getObjectLiteralIndexInfo(node, properties, kind) {
+            var propTypes = [];
+            for (var i = 0; i < properties.length; i++) {
+                if (kind === 0 /* String */ || isNumericName(node.properties[i].name)) {
+                    propTypes.push(getTypeOfSymbol(properties[i]));
+                }
+            }
+            var unionType = propTypes.length ? getUnionType(propTypes) : undefinedType;
+            return createIndexInfo(unionType, /*isReadonly*/ false);
+        }
+        function checkObjectLiteral(node, contextualMapper) {
+            var inDestructuringPattern = ts.isAssignmentTarget(node);
+            // Grammar checking
+            checkGrammarObjectLiteralExpression(node, inDestructuringPattern);
+            var propertiesTable = {};
+            var propertiesArray = [];
+            var contextualType = getApparentTypeOfContextualType(node);
+            var contextualTypeHasPattern = contextualType && contextualType.pattern &&
+                (contextualType.pattern.kind === 167 /* ObjectBindingPattern */ || contextualType.pattern.kind === 171 /* ObjectLiteralExpression */);
+            var typeFlags = 0;
+            var patternWithComputedProperties = false;
+            var hasComputedStringProperty = false;
+            var hasComputedNumberProperty = false;
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var memberDecl = _a[_i];
+                var member = memberDecl.symbol;
+                if (memberDecl.kind === 253 /* PropertyAssignment */ ||
+                    memberDecl.kind === 254 /* ShorthandPropertyAssignment */ ||
+                    ts.isObjectLiteralMethod(memberDecl)) {
+                    var type = void 0;
+                    if (memberDecl.kind === 253 /* PropertyAssignment */) {
+                        type = checkPropertyAssignment(memberDecl, contextualMapper);
+                    }
+                    else if (memberDecl.kind === 147 /* MethodDeclaration */) {
+                        type = checkObjectLiteralMethod(memberDecl, contextualMapper);
+                    }
+                    else {
+                        ts.Debug.assert(memberDecl.kind === 254 /* ShorthandPropertyAssignment */);
+                        type = checkExpression(memberDecl.name, contextualMapper);
+                    }
+                    typeFlags |= type.flags;
+                    var prop = createSymbol(4 /* Property */ | 67108864 /* Transient */ | member.flags, member.name);
+                    if (inDestructuringPattern) {
+                        // If object literal is an assignment pattern and if the assignment pattern specifies a default value
+                        // for the property, make the property optional.
+                        var isOptional = (memberDecl.kind === 253 /* PropertyAssignment */ && hasDefaultValue(memberDecl.initializer)) ||
+                            (memberDecl.kind === 254 /* ShorthandPropertyAssignment */ && memberDecl.objectAssignmentInitializer);
+                        if (isOptional) {
+                            prop.flags |= 536870912 /* Optional */;
+                        }
+                        if (ts.hasDynamicName(memberDecl)) {
+                            patternWithComputedProperties = true;
+                        }
+                    }
+                    else if (contextualTypeHasPattern && !(contextualType.flags & 67108864 /* ObjectLiteralPatternWithComputedProperties */)) {
+                        // If object literal is contextually typed by the implied type of a binding pattern, and if the
+                        // binding pattern specifies a default value for the property, make the property optional.
+                        var impliedProp = getPropertyOfType(contextualType, member.name);
+                        if (impliedProp) {
+                            prop.flags |= impliedProp.flags & 536870912 /* Optional */;
+                        }
+                        else if (!compilerOptions.suppressExcessPropertyErrors) {
+                            error(memberDecl.name, ts.Diagnostics.Object_literal_may_only_specify_known_properties_and_0_does_not_exist_in_type_1, symbolToString(member), typeToString(contextualType));
+                        }
+                    }
+                    prop.declarations = member.declarations;
+                    prop.parent = member.parent;
+                    if (member.valueDeclaration) {
+                        prop.valueDeclaration = member.valueDeclaration;
+                    }
+                    prop.type = type;
+                    prop.target = member;
+                    member = prop;
+                }
+                else {
+                    // TypeScript 1.0 spec (April 2014)
+                    // A get accessor declaration is processed in the same manner as
+                    // an ordinary function declaration(section 6.1) with no parameters.
+                    // A set accessor declaration is processed in the same manner
+                    // as an ordinary function declaration with a single parameter and a Void return type.
+                    ts.Debug.assert(memberDecl.kind === 149 /* GetAccessor */ || memberDecl.kind === 150 /* SetAccessor */);
+                    checkAccessorDeclaration(memberDecl);
+                }
+                if (ts.hasDynamicName(memberDecl)) {
+                    if (isNumericName(memberDecl.name)) {
+                        hasComputedNumberProperty = true;
+                    }
+                    else {
+                        hasComputedStringProperty = true;
+                    }
+                }
+                else {
+                    propertiesTable[member.name] = member;
+                }
+                propertiesArray.push(member);
+            }
+            // If object literal is contextually typed by the implied type of a binding pattern, augment the result
+            // type with those properties for which the binding pattern specifies a default value.
+            if (contextualTypeHasPattern) {
+                for (var _b = 0, _c = getPropertiesOfType(contextualType); _b < _c.length; _b++) {
+                    var prop = _c[_b];
+                    if (!ts.hasProperty(propertiesTable, prop.name)) {
+                        if (!(prop.flags & 536870912 /* Optional */)) {
+                            error(prop.valueDeclaration || prop.bindingElement, ts.Diagnostics.Initializer_provides_no_value_for_this_binding_element_and_the_binding_element_has_no_default_value);
+                        }
+                        propertiesTable[prop.name] = prop;
+                        propertiesArray.push(prop);
+                    }
+                }
+            }
+            var stringIndexInfo = hasComputedStringProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 0 /* String */) : undefined;
+            var numberIndexInfo = hasComputedNumberProperty ? getObjectLiteralIndexInfo(node, propertiesArray, 1 /* Number */) : undefined;
+            var result = createAnonymousType(node.symbol, propertiesTable, emptyArray, emptyArray, stringIndexInfo, numberIndexInfo);
+            var freshObjectLiteralFlag = compilerOptions.suppressExcessPropertyErrors ? 0 : 1048576 /* FreshObjectLiteral */;
+            result.flags |= 524288 /* ObjectLiteral */ | 4194304 /* ContainsObjectLiteral */ | freshObjectLiteralFlag | (typeFlags & 14680064 /* PropagatingFlags */) | (patternWithComputedProperties ? 67108864 /* ObjectLiteralPatternWithComputedProperties */ : 0);
+            if (inDestructuringPattern) {
+                result.pattern = node;
+            }
+            return result;
+        }
+        function checkJsxSelfClosingElement(node) {
+            checkJsxOpeningLikeElement(node);
+            return jsxElementType || anyType;
+        }
+        function checkJsxElement(node) {
+            // Check attributes
+            checkJsxOpeningLikeElement(node.openingElement);
+            // Perform resolution on the closing tag so that rename/go to definition/etc work
+            if (isJsxIntrinsicIdentifier(node.closingElement.tagName)) {
+                getIntrinsicTagSymbol(node.closingElement);
+            }
+            else {
+                checkExpression(node.closingElement.tagName);
+            }
+            // Check children
+            for (var _i = 0, _a = node.children; _i < _a.length; _i++) {
+                var child = _a[_i];
+                switch (child.kind) {
+                    case 248 /* JsxExpression */:
+                        checkJsxExpression(child);
+                        break;
+                    case 241 /* JsxElement */:
+                        checkJsxElement(child);
+                        break;
+                    case 242 /* JsxSelfClosingElement */:
+                        checkJsxSelfClosingElement(child);
+                        break;
+                }
+            }
+            return jsxElementType || anyType;
+        }
+        /**
+         * Returns true iff the JSX element name would be a valid JS identifier, ignoring restrictions about keywords not being identifiers
+         */
+        function isUnhyphenatedJsxName(name) {
+            // - is the only character supported in JSX attribute names that isn't valid in JavaScript identifiers
+            return name.indexOf("-") < 0;
+        }
+        /**
+         * Returns true iff React would emit this tag name as a string rather than an identifier or qualified name
+         */
+        function isJsxIntrinsicIdentifier(tagName) {
+            if (tagName.kind === 139 /* QualifiedName */) {
+                return false;
+            }
+            else {
+                return ts.isIntrinsicJsxName(tagName.text);
+            }
+        }
+        function checkJsxAttribute(node, elementAttributesType, nameTable) {
+            var correspondingPropType = undefined;
+            // Look up the corresponding property for this attribute
+            if (elementAttributesType === emptyObjectType && isUnhyphenatedJsxName(node.name.text)) {
+                // If there is no 'props' property, you may not have non-"data-" attributes
+                error(node.parent, ts.Diagnostics.JSX_element_class_does_not_support_attributes_because_it_does_not_have_a_0_property, getJsxElementPropertiesName());
+            }
+            else if (elementAttributesType && !isTypeAny(elementAttributesType)) {
+                var correspondingPropSymbol = getPropertyOfType(elementAttributesType, node.name.text);
+                correspondingPropType = correspondingPropSymbol && getTypeOfSymbol(correspondingPropSymbol);
+                if (isUnhyphenatedJsxName(node.name.text)) {
+                    // Maybe there's a string indexer?
+                    var indexerType = getIndexTypeOfType(elementAttributesType, 0 /* String */);
+                    if (indexerType) {
+                        correspondingPropType = indexerType;
+                    }
+                    else {
+                        // If there's no corresponding property with this name, error
+                        if (!correspondingPropType) {
+                            error(node.name, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.name.text, typeToString(elementAttributesType));
+                            return unknownType;
+                        }
+                    }
+                }
+            }
+            var exprType;
+            if (node.initializer) {
+                exprType = checkExpression(node.initializer);
+            }
+            else {
+                // <Elem attr /> is sugar for <Elem attr={true} />
+                exprType = booleanType;
+            }
+            if (correspondingPropType) {
+                checkTypeAssignableTo(exprType, correspondingPropType, node);
+            }
+            nameTable[node.name.text] = true;
+            return exprType;
+        }
+        function checkJsxSpreadAttribute(node, elementAttributesType, nameTable) {
+            var type = checkExpression(node.expression);
+            var props = getPropertiesOfType(type);
+            for (var _i = 0, props_2 = props; _i < props_2.length; _i++) {
+                var prop = props_2[_i];
+                // Is there a corresponding property in the element attributes type? Skip checking of properties
+                // that have already been assigned to, as these are not actually pushed into the resulting type
+                if (!nameTable[prop.name]) {
+                    var targetPropSym = getPropertyOfType(elementAttributesType, prop.name);
+                    if (targetPropSym) {
+                        var msg = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Property_0_of_JSX_spread_attribute_is_not_assignable_to_target_property, prop.name);
+                        checkTypeAssignableTo(getTypeOfSymbol(prop), getTypeOfSymbol(targetPropSym), node, undefined, msg);
+                    }
+                    nameTable[prop.name] = true;
+                }
+            }
+            return type;
+        }
+        function getJsxType(name) {
+            if (jsxTypes[name] === undefined) {
+                return jsxTypes[name] = getExportedTypeFromNamespace(JsxNames.JSX, name) || unknownType;
+            }
+            return jsxTypes[name];
+        }
+        /**
+          * Looks up an intrinsic tag name and returns a symbol that either points to an intrinsic
+          * property (in which case nodeLinks.jsxFlags will be IntrinsicNamedElement) or an intrinsic
+          * string index signature (in which case nodeLinks.jsxFlags will be IntrinsicIndexedElement).
+          * May also return unknownSymbol if both of these lookups fail.
+          */
+        function getIntrinsicTagSymbol(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedSymbol) {
+                var intrinsicElementsType = getJsxType(JsxNames.IntrinsicElements);
+                if (intrinsicElementsType !== unknownType) {
+                    // Property case
+                    var intrinsicProp = getPropertyOfType(intrinsicElementsType, node.tagName.text);
+                    if (intrinsicProp) {
+                        links.jsxFlags |= 1 /* IntrinsicNamedElement */;
+                        return links.resolvedSymbol = intrinsicProp;
+                    }
+                    // Intrinsic string indexer case
+                    var indexSignatureType = getIndexTypeOfType(intrinsicElementsType, 0 /* String */);
+                    if (indexSignatureType) {
+                        links.jsxFlags |= 2 /* IntrinsicIndexedElement */;
+                        return links.resolvedSymbol = intrinsicElementsType.symbol;
+                    }
+                    // Wasn't found
+                    error(node, ts.Diagnostics.Property_0_does_not_exist_on_type_1, node.tagName.text, "JSX." + JsxNames.IntrinsicElements);
+                    return links.resolvedSymbol = unknownSymbol;
+                }
+                else {
+                    if (compilerOptions.noImplicitAny) {
+                        error(node, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_no_interface_JSX_0_exists, JsxNames.IntrinsicElements);
+                    }
+                    return links.resolvedSymbol = unknownSymbol;
+                }
+            }
+            return links.resolvedSymbol;
+        }
+        /**
+         * Given a JSX element that is a class element, finds the Element Instance Type. If the
+         * element is not a class element, or the class element type cannot be determined, returns 'undefined'.
+         * For example, in the element <MyClass>, the element instance type is `MyClass` (not `typeof MyClass`).
+         */
+        function getJsxElementInstanceType(node, valueType) {
+            ts.Debug.assert(!(valueType.flags & 16384 /* Union */));
+            if (isTypeAny(valueType)) {
+                // Short-circuit if the class tag is using an element type 'any'
+                return anyType;
+            }
+            // Resolve the signatures, preferring constructor
+            var signatures = getSignaturesOfType(valueType, 1 /* Construct */);
+            if (signatures.length === 0) {
+                // No construct signatures, try call signatures
+                signatures = getSignaturesOfType(valueType, 0 /* Call */);
+                if (signatures.length === 0) {
+                    // We found no signatures at all, which is an error
+                    error(node.tagName, ts.Diagnostics.JSX_element_type_0_does_not_have_any_construct_or_call_signatures, ts.getTextOfNode(node.tagName));
+                    return unknownType;
+                }
+            }
+            return getUnionType(signatures.map(getReturnTypeOfSignature));
+        }
+        /// e.g. "props" for React.d.ts,
+        /// or 'undefined' if ElementAttributesProperty doesn't exist (which means all
+        ///     non-intrinsic elements' attributes type is 'any'),
+        /// or '' if it has 0 properties (which means every
+        ///     non-intrinsic elements' attributes type is the element instance type)
+        function getJsxElementPropertiesName() {
+            // JSX
+            var jsxNamespace = getGlobalSymbol(JsxNames.JSX, 1536 /* Namespace */, /*diagnosticMessage*/ undefined);
+            // JSX.ElementAttributesProperty [symbol]
+            var attribsPropTypeSym = jsxNamespace && getSymbol(jsxNamespace.exports, JsxNames.ElementAttributesPropertyNameContainer, 793056 /* Type */);
+            // JSX.ElementAttributesProperty [type]
+            var attribPropType = attribsPropTypeSym && getDeclaredTypeOfSymbol(attribsPropTypeSym);
+            // The properties of JSX.ElementAttributesProperty
+            var attribProperties = attribPropType && getPropertiesOfType(attribPropType);
+            if (attribProperties) {
+                // Element Attributes has zero properties, so the element attributes type will be the class instance type
+                if (attribProperties.length === 0) {
+                    return "";
+                }
+                else if (attribProperties.length === 1) {
+                    return attribProperties[0].name;
+                }
+                else {
+                    error(attribsPropTypeSym.declarations[0], ts.Diagnostics.The_global_type_JSX_0_may_not_have_more_than_one_property, JsxNames.ElementAttributesPropertyNameContainer);
+                    return undefined;
+                }
+            }
+            else {
+                // No interface exists, so the element attributes type will be an implicit any
+                return undefined;
+            }
+        }
+        /**
+         * Given React element instance type and the class type, resolve the Jsx type
+         * Pass elemType to handle individual type in the union typed element type.
+         */
+        function getResolvedJsxType(node, elemType, elemClassType) {
+            if (!elemType) {
+                elemType = checkExpression(node.tagName);
+            }
+            if (elemType.flags & 16384 /* Union */) {
+                var types = elemType.types;
+                return getUnionType(types.map(function (type) {
+                    return getResolvedJsxType(node, type, elemClassType);
+                }));
+            }
+            // Get the element instance type (the result of newing or invoking this tag)
+            var elemInstanceType = getJsxElementInstanceType(node, elemType);
+            if (!elemClassType || !isTypeAssignableTo(elemInstanceType, elemClassType)) {
+                // Is this is a stateless function component? See if its single signature's return type is
+                // assignable to the JSX Element Type
+                if (jsxElementType) {
+                    var callSignatures = elemType && getSignaturesOfType(elemType, 0 /* Call */);
+                    var callSignature = callSignatures && callSignatures.length > 0 && callSignatures[0];
+                    var callReturnType = callSignature && getReturnTypeOfSignature(callSignature);
+                    var paramType = callReturnType && (callSignature.parameters.length === 0 ? emptyObjectType : getTypeOfSymbol(callSignature.parameters[0]));
+                    if (callReturnType && isTypeAssignableTo(callReturnType, jsxElementType)) {
+                        // Intersect in JSX.IntrinsicAttributes if it exists
+                        var intrinsicAttributes = getJsxType(JsxNames.IntrinsicAttributes);
+                        if (intrinsicAttributes !== unknownType) {
+                            paramType = intersectTypes(intrinsicAttributes, paramType);
+                        }
+                        return paramType;
+                    }
+                }
+            }
+            // Issue an error if this return type isn't assignable to JSX.ElementClass
+            if (elemClassType) {
+                checkTypeRelatedTo(elemInstanceType, elemClassType, assignableRelation, node, ts.Diagnostics.JSX_element_type_0_is_not_a_constructor_function_for_JSX_elements);
+            }
+            if (isTypeAny(elemInstanceType)) {
+                return elemInstanceType;
+            }
+            var propsName = getJsxElementPropertiesName();
+            if (propsName === undefined) {
+                // There is no type ElementAttributesProperty, return 'any'
+                return anyType;
+            }
+            else if (propsName === "") {
+                // If there is no e.g. 'props' member in ElementAttributesProperty, use the element class type instead
+                return elemInstanceType;
+            }
+            else {
+                var attributesType = getTypeOfPropertyOfType(elemInstanceType, propsName);
+                if (!attributesType) {
+                    // There is no property named 'props' on this instance type
+                    return emptyObjectType;
+                }
+                else if (isTypeAny(attributesType) || (attributesType === unknownType)) {
+                    // Props is of type 'any' or unknown
+                    return attributesType;
+                }
+                else if (attributesType.flags & 16384 /* Union */) {
+                    // Props cannot be a union type
+                    error(node.tagName, ts.Diagnostics.JSX_element_attributes_type_0_may_not_be_a_union_type, typeToString(attributesType));
+                    return anyType;
+                }
+                else {
+                    // Normal case -- add in IntrinsicClassElements<T> and IntrinsicElements
+                    var apparentAttributesType = attributesType;
+                    var intrinsicClassAttribs = getJsxType(JsxNames.IntrinsicClassAttributes);
+                    if (intrinsicClassAttribs !== unknownType) {
+                        var typeParams = getLocalTypeParametersOfClassOrInterfaceOrTypeAlias(intrinsicClassAttribs.symbol);
+                        if (typeParams) {
+                            if (typeParams.length === 1) {
+                                apparentAttributesType = intersectTypes(createTypeReference(intrinsicClassAttribs, [elemInstanceType]), apparentAttributesType);
+                            }
+                        }
+                        else {
+                            apparentAttributesType = intersectTypes(attributesType, intrinsicClassAttribs);
+                        }
+                    }
+                    var intrinsicAttribs = getJsxType(JsxNames.IntrinsicAttributes);
+                    if (intrinsicAttribs !== unknownType) {
+                        apparentAttributesType = intersectTypes(intrinsicAttribs, apparentAttributesType);
+                    }
+                    return apparentAttributesType;
+                }
+            }
+        }
+        /**
+         * Given an opening/self-closing element, get the 'element attributes type', i.e. the type that tells
+         * us which attributes are valid on a given element.
+         */
+        function getJsxElementAttributesType(node) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedJsxType) {
+                if (isJsxIntrinsicIdentifier(node.tagName)) {
+                    var symbol = getIntrinsicTagSymbol(node);
+                    if (links.jsxFlags & 1 /* IntrinsicNamedElement */) {
+                        return links.resolvedJsxType = getTypeOfSymbol(symbol);
+                    }
+                    else if (links.jsxFlags & 2 /* IntrinsicIndexedElement */) {
+                        return links.resolvedJsxType = getIndexInfoOfSymbol(symbol, 0 /* String */).type;
+                    }
+                    else {
+                        return links.resolvedJsxType = unknownType;
+                    }
+                }
+                else {
+                    var elemClassType = getJsxGlobalElementClassType();
+                    return links.resolvedJsxType = getResolvedJsxType(node, undefined, elemClassType);
+                }
+            }
+            return links.resolvedJsxType;
+        }
+        /**
+         * Given a JSX attribute, returns the symbol for the corresponds property
+         * of the element attributes type. Will return unknownSymbol for attributes
+         * that have no matching element attributes type property.
+         */
+        function getJsxAttributePropertySymbol(attrib) {
+            var attributesType = getJsxElementAttributesType(attrib.parent);
+            var prop = getPropertyOfType(attributesType, attrib.name.text);
+            return prop || unknownSymbol;
+        }
+        function getJsxGlobalElementClassType() {
+            if (!jsxElementClassType) {
+                jsxElementClassType = getExportedTypeFromNamespace(JsxNames.JSX, JsxNames.ElementClass);
+            }
+            return jsxElementClassType;
+        }
+        /// Returns all the properties of the Jsx.IntrinsicElements interface
+        function getJsxIntrinsicTagNames() {
+            var intrinsics = getJsxType(JsxNames.IntrinsicElements);
+            return intrinsics ? getPropertiesOfType(intrinsics) : emptyArray;
+        }
+        function checkJsxPreconditions(errorNode) {
+            // Preconditions for using JSX
+            if ((compilerOptions.jsx || 0 /* None */) === 0 /* None */) {
+                error(errorNode, ts.Diagnostics.Cannot_use_JSX_unless_the_jsx_flag_is_provided);
+            }
+            if (jsxElementType === undefined) {
+                if (compilerOptions.noImplicitAny) {
+                    error(errorNode, ts.Diagnostics.JSX_element_implicitly_has_type_any_because_the_global_type_JSX_Element_does_not_exist);
+                }
+            }
+        }
+        function checkJsxOpeningLikeElement(node) {
+            checkGrammarJsxElement(node);
+            checkJsxPreconditions(node);
+            // The reactNamespace symbol should be marked as 'used' so we don't incorrectly elide its import. And if there
+            // is no reactNamespace symbol in scope when targeting React emit, we should issue an error.
+            var reactRefErr = compilerOptions.jsx === 2 /* React */ ? ts.Diagnostics.Cannot_find_name_0 : undefined;
+            var reactNamespace = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
+            var reactSym = resolveName(node.tagName, reactNamespace, 107455 /* Value */, reactRefErr, reactNamespace);
+            if (reactSym) {
+                getSymbolLinks(reactSym).referenced = true;
+            }
+            var targetAttributesType = getJsxElementAttributesType(node);
+            var nameTable = {};
+            // Process this array in right-to-left order so we know which
+            // attributes (mostly from spreads) are being overwritten and
+            // thus should have their types ignored
+            var sawSpreadedAny = false;
+            for (var i = node.attributes.length - 1; i >= 0; i--) {
+                if (node.attributes[i].kind === 246 /* JsxAttribute */) {
+                    checkJsxAttribute((node.attributes[i]), targetAttributesType, nameTable);
+                }
+                else {
+                    ts.Debug.assert(node.attributes[i].kind === 247 /* JsxSpreadAttribute */);
+                    var spreadType = checkJsxSpreadAttribute((node.attributes[i]), targetAttributesType, nameTable);
+                    if (isTypeAny(spreadType)) {
+                        sawSpreadedAny = true;
+                    }
+                }
+            }
+            // Check that all required properties have been provided. If an 'any'
+            // was spreaded in, though, assume that it provided all required properties
+            if (targetAttributesType && !sawSpreadedAny) {
+                var targetProperties = getPropertiesOfType(targetAttributesType);
+                for (var i = 0; i < targetProperties.length; i++) {
+                    if (!(targetProperties[i].flags & 536870912 /* Optional */) &&
+                        nameTable[targetProperties[i].name] === undefined) {
+                        error(node, ts.Diagnostics.Property_0_is_missing_in_type_1, targetProperties[i].name, typeToString(targetAttributesType));
+                    }
+                }
+            }
+        }
+        function checkJsxExpression(node) {
+            if (node.expression) {
+                return checkExpression(node.expression);
+            }
+            else {
+                return unknownType;
+            }
+        }
+        // If a symbol is a synthesized symbol with no value declaration, we assume it is a property. Example of this are the synthesized
+        // '.prototype' property as well as synthesized tuple index properties.
+        function getDeclarationKindFromSymbol(s) {
+            return s.valueDeclaration ? s.valueDeclaration.kind : 145 /* PropertyDeclaration */;
+        }
+        function getDeclarationFlagsFromSymbol(s) {
+            return s.valueDeclaration ? ts.getCombinedNodeFlags(s.valueDeclaration) : s.flags & 134217728 /* Prototype */ ? 4 /* Public */ | 32 /* Static */ : 0;
+        }
+        /**
+         * Check whether the requested property access is valid.
+         * Returns true if node is a valid property access, and false otherwise.
+         * @param node The node to be checked.
+         * @param left The left hand side of the property access (e.g.: the super in `super.foo`).
+         * @param type The type of left.
+         * @param prop The symbol for the right hand side of the property access.
+         */
+        function checkClassPropertyAccess(node, left, type, prop) {
+            var flags = getDeclarationFlagsFromSymbol(prop);
+            var declaringClass = getDeclaredTypeOfSymbol(getParentOfSymbol(prop));
+            var errorNode = node.kind === 172 /* PropertyAccessExpression */ || node.kind === 218 /* VariableDeclaration */ ?
+                node.name :
+                node.right;
+            if (left.kind === 95 /* SuperKeyword */) {
+                // TS 1.0 spec (April 2014): 4.8.2
+                // - In a constructor, instance member function, instance member accessor, or
+                //   instance member variable initializer where this references a derived class instance,
+                //   a super property access is permitted and must specify a public instance member function of the base class.
+                // - In a static member function or static member accessor
+                //   where this references the constructor function object of a derived class,
+                //   a super property access is permitted and must specify a public static member function of the base class.
+                if (languageVersion < 2 /* ES6 */ && getDeclarationKindFromSymbol(prop) !== 147 /* MethodDeclaration */) {
+                    // `prop` refers to a *property* declared in the super class
+                    // rather than a *method*, so it does not satisfy the above criteria.
+                    error(errorNode, ts.Diagnostics.Only_public_and_protected_methods_of_the_base_class_are_accessible_via_the_super_keyword);
+                    return false;
+                }
+                if (flags & 128 /* Abstract */) {
+                    // A method cannot be accessed in a super property access if the method is abstract.
+                    // This error could mask a private property access error. But, a member
+                    // cannot simultaneously be private and abstract, so this will trigger an
+                    // additional error elsewhere.
+                    error(errorNode, ts.Diagnostics.Abstract_method_0_in_class_1_cannot_be_accessed_via_super_expression, symbolToString(prop), typeToString(declaringClass));
+                    return false;
+                }
+            }
+            // Public properties are otherwise accessible.
+            if (!(flags & (8 /* Private */ | 16 /* Protected */))) {
+                return true;
+            }
+            // Property is known to be private or protected at this point
+            // Private property is accessible if the property is within the declaring class
+            if (flags & 8 /* Private */) {
+                var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(getParentOfSymbol(prop));
+                if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                    error(errorNode, ts.Diagnostics.Property_0_is_private_and_only_accessible_within_class_1, symbolToString(prop), typeToString(declaringClass));
+                    return false;
+                }
+                return true;
+            }
+            // Property is known to be protected at this point
+            // All protected properties of a supertype are accessible in a super access
+            if (left.kind === 95 /* SuperKeyword */) {
+                return true;
+            }
+            // Get the enclosing class that has the declaring class as its base type
+            var enclosingClass = forEachEnclosingClass(node, function (enclosingDeclaration) {
+                var enclosingClass = getDeclaredTypeOfSymbol(getSymbolOfNode(enclosingDeclaration));
+                return hasBaseType(enclosingClass, declaringClass) ? enclosingClass : undefined;
+            });
+            // A protected property is accessible if the property is within the declaring class or classes derived from it
+            if (!enclosingClass) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_within_class_1_and_its_subclasses, symbolToString(prop), typeToString(declaringClass));
+                return false;
+            }
+            // No further restrictions for static properties
+            if (flags & 32 /* Static */) {
+                return true;
+            }
+            // An instance property must be accessed through an instance of the enclosing class
+            if (type.flags & 33554432 /* ThisType */) {
+                // get the original type -- represented as the type constraint of the 'this' type
+                type = getConstraintOfTypeParameter(type);
+            }
+            // TODO: why is the first part of this check here?
+            if (!(getTargetType(type).flags & (1024 /* Class */ | 2048 /* Interface */) && hasBaseType(type, enclosingClass))) {
+                error(errorNode, ts.Diagnostics.Property_0_is_protected_and_only_accessible_through_an_instance_of_class_1, symbolToString(prop), typeToString(enclosingClass));
+                return false;
+            }
+            return true;
+        }
+        function checkNonNullExpression(node) {
+            var type = checkExpression(node);
+            if (strictNullChecks) {
+                var kind = getCombinedTypeFlags(type) & 96 /* Nullable */;
+                if (kind) {
+                    error(node, kind & 32 /* Undefined */ ? kind & 64 /* Null */ ?
+                        ts.Diagnostics.Object_is_possibly_null_or_undefined :
+                        ts.Diagnostics.Object_is_possibly_undefined :
+                        ts.Diagnostics.Object_is_possibly_null);
+                }
+                return getNonNullableType(type);
+            }
+            return type;
+        }
+        function checkPropertyAccessExpression(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.expression, node.name);
+        }
+        function checkQualifiedName(node) {
+            return checkPropertyAccessExpressionOrQualifiedName(node, node.left, node.right);
+        }
+        function checkPropertyAccessExpressionOrQualifiedName(node, left, right) {
+            var type = checkNonNullExpression(left);
+            if (isTypeAny(type)) {
+                return type;
+            }
+            var apparentType = getApparentType(getWidenedType(type));
+            if (apparentType === unknownType || (type.flags & 512 /* TypeParameter */ && isTypeAny(apparentType))) {
+                // handle cases when type is Type parameter with invalid or any constraint
+                return apparentType;
+            }
+            var prop = getPropertyOfType(apparentType, right.text);
+            if (!prop) {
+                if (right.text) {
+                    error(right, ts.Diagnostics.Property_0_does_not_exist_on_type_1, ts.declarationNameToString(right), typeToString(type.flags & 33554432 /* ThisType */ ? apparentType : type));
+                }
+                return unknownType;
+            }
+            getNodeLinks(node).resolvedSymbol = prop;
+            if (prop.parent && prop.parent.flags & 32 /* Class */) {
+                checkClassPropertyAccess(node, left, apparentType, prop);
+            }
+            var propType = getTypeOfSymbol(prop);
+            // Only compute control flow type if this is a property access expression that isn't an
+            // assignment target, and the referenced property was declared as a variable, property,
+            // accessor, or optional method.
+            if (node.kind !== 172 /* PropertyAccessExpression */ || ts.isAssignmentTarget(node) ||
+                !(prop.flags & (3 /* Variable */ | 4 /* Property */ | 98304 /* Accessor */)) &&
+                    !(prop.flags & 8192 /* Method */ && propType.flags & 16384 /* Union */)) {
+                return propType;
+            }
+            return getFlowTypeOfReference(node, propType, /*assumeInitialized*/ true, /*includeOuterFunctions*/ false);
+        }
+        function isValidPropertyAccess(node, propertyName) {
+            var left = node.kind === 172 /* PropertyAccessExpression */
+                ? node.expression
+                : node.left;
+            var type = checkExpression(left);
+            if (type !== unknownType && !isTypeAny(type)) {
+                var prop = getPropertyOfType(getWidenedType(type), propertyName);
+                if (prop && prop.parent && prop.parent.flags & 32 /* Class */) {
+                    return checkClassPropertyAccess(node, left, type, prop);
+                }
+            }
+            return true;
+        }
+        /**
+         * Return the symbol of the for-in variable declared or referenced by the given for-in statement.
+         */
+        function getForInVariableSymbol(node) {
+            var initializer = node.initializer;
+            if (initializer.kind === 219 /* VariableDeclarationList */) {
+                var variable = initializer.declarations[0];
+                if (variable && !ts.isBindingPattern(variable.name)) {
+                    return getSymbolOfNode(variable);
+                }
+            }
+            else if (initializer.kind === 69 /* Identifier */) {
+                return getResolvedSymbol(initializer);
+            }
+            return undefined;
+        }
+        /**
+         * Return true if the given type is considered to have numeric property names.
+         */
+        function hasNumericPropertyNames(type) {
+            return getIndexTypeOfType(type, 1 /* Number */) && !getIndexTypeOfType(type, 0 /* String */);
+        }
+        /**
+         * Return true if given node is an expression consisting of an identifier (possibly parenthesized)
+         * that references a for-in variable for an object with numeric property names.
+         */
+        function isForInVariableForNumericPropertyNames(expr) {
+            var e = skipParenthesizedNodes(expr);
+            if (e.kind === 69 /* Identifier */) {
+                var symbol = getResolvedSymbol(e);
+                if (symbol.flags & 3 /* Variable */) {
+                    var child = expr;
+                    var node = expr.parent;
+                    while (node) {
+                        if (node.kind === 207 /* ForInStatement */ &&
+                            child === node.statement &&
+                            getForInVariableSymbol(node) === symbol &&
+                            hasNumericPropertyNames(checkExpression(node.expression))) {
+                            return true;
+                        }
+                        child = node;
+                        node = node.parent;
+                    }
+                }
+            }
+            return false;
+        }
+        function checkIndexedAccess(node) {
+            // Grammar checking
+            if (!node.argumentExpression) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                if (node.parent.kind === 175 /* NewExpression */ && node.parent.expression === node) {
+                    var start = ts.skipTrivia(sourceFile.text, node.expression.end);
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.new_T_cannot_be_used_to_create_an_array_Use_new_Array_T_instead);
+                }
+                else {
+                    var start = node.end - "]".length;
+                    var end = node.end;
+                    grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Expression_expected);
+                }
+            }
+            // Obtain base constraint such that we can bail out if the constraint is an unknown type
+            var objectType = getApparentType(checkNonNullExpression(node.expression));
+            var indexType = node.argumentExpression ? checkExpression(node.argumentExpression) : unknownType;
+            if (objectType === unknownType) {
+                return unknownType;
+            }
+            var isConstEnum = isConstEnumObjectType(objectType);
+            if (isConstEnum &&
+                (!node.argumentExpression || node.argumentExpression.kind !== 9 /* StringLiteral */)) {
+                error(node.argumentExpression, ts.Diagnostics.A_const_enum_member_can_only_be_accessed_using_a_string_literal);
+                return unknownType;
+            }
+            // TypeScript 1.0 spec (April 2014): 4.10 Property Access
+            // - If IndexExpr is a string literal or a numeric literal and ObjExpr's apparent type has a property with the name
+            //    given by that literal(converted to its string representation in the case of a numeric literal), the property access is of the type of that property.
+            // - Otherwise, if ObjExpr's apparent type has a numeric index signature and IndexExpr is of type Any, the Number primitive type, or an enum type,
+            //    the property access is of the type of that index signature.
+            // - Otherwise, if ObjExpr's apparent type has a string index signature and IndexExpr is of type Any, the String or Number primitive type, or an enum type,
+            //    the property access is of the type of that index signature.
+            // - Otherwise, if IndexExpr is of type Any, the String or Number primitive type, or an enum type, the property access is of type Any.
+            // See if we can index as a property.
+            if (node.argumentExpression) {
+                var name_13 = getPropertyNameForIndexedAccess(node.argumentExpression, indexType);
+                if (name_13 !== undefined) {
+                    var prop = getPropertyOfType(objectType, name_13);
+                    if (prop) {
+                        getNodeLinks(node).resolvedSymbol = prop;
+                        return getTypeOfSymbol(prop);
+                    }
+                    else if (isConstEnum) {
+                        error(node.argumentExpression, ts.Diagnostics.Property_0_does_not_exist_on_const_enum_1, name_13, symbolToString(objectType.symbol));
+                        return unknownType;
+                    }
+                }
+            }
+            // Check for compatible indexer types.
+            if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 258 /* StringLike */ | 132 /* NumberLike */ | 16777216 /* ESSymbol */)) {
+                // Try to use a number indexer.
+                if (isTypeAnyOrAllConstituentTypesHaveKind(indexType, 132 /* NumberLike */) || isForInVariableForNumericPropertyNames(node.argumentExpression)) {
+                    var numberIndexInfo = getIndexInfoOfType(objectType, 1 /* Number */);
+                    if (numberIndexInfo) {
+                        getNodeLinks(node).resolvedIndexInfo = numberIndexInfo;
+                        return numberIndexInfo.type;
+                    }
+                }
+                // Try to use string indexing.
+                var stringIndexInfo = getIndexInfoOfType(objectType, 0 /* String */);
+                if (stringIndexInfo) {
+                    getNodeLinks(node).resolvedIndexInfo = stringIndexInfo;
+                    return stringIndexInfo.type;
+                }
+                // Fall back to any.
+                if (compilerOptions.noImplicitAny && !compilerOptions.suppressImplicitAnyIndexErrors && !isTypeAny(objectType)) {
+                    error(node, getIndexTypeOfType(objectType, 1 /* Number */) ?
+                        ts.Diagnostics.Element_implicitly_has_an_any_type_because_index_expression_is_not_of_type_number :
+                        ts.Diagnostics.Index_signature_of_object_type_implicitly_has_an_any_type);
+                }
+                return anyType;
+            }
+            // REVIEW: Users should know the type that was actually used.
+            error(node, ts.Diagnostics.An_index_expression_argument_must_be_of_type_string_number_symbol_or_any);
+            return unknownType;
+        }
+        /**
+         * If indexArgumentExpression is a string literal or number literal, returns its text.
+         * If indexArgumentExpression is a constant value, returns its string value.
+         * If indexArgumentExpression is a well known symbol, returns the property name corresponding
+         *    to this symbol, as long as it is a proper symbol reference.
+         * Otherwise, returns undefined.
+         */
+        function getPropertyNameForIndexedAccess(indexArgumentExpression, indexArgumentType) {
+            if (indexArgumentExpression.kind === 9 /* StringLiteral */ || indexArgumentExpression.kind === 8 /* NumericLiteral */) {
+                return indexArgumentExpression.text;
+            }
+            if (indexArgumentExpression.kind === 173 /* ElementAccessExpression */ || indexArgumentExpression.kind === 172 /* PropertyAccessExpression */) {
+                var value = getConstantValue(indexArgumentExpression);
+                if (value !== undefined) {
+                    return value.toString();
+                }
+            }
+            if (checkThatExpressionIsProperSymbolReference(indexArgumentExpression, indexArgumentType, /*reportError*/ false)) {
+                var rightHandSideName = indexArgumentExpression.name.text;
+                return ts.getPropertyNameForKnownSymbolName(rightHandSideName);
+            }
+            return undefined;
+        }
+        /**
+         * A proper symbol reference requires the following:
+         *   1. The property access denotes a property that exists
+         *   2. The expression is of the form Symbol.<identifier>
+         *   3. The property access is of the primitive type symbol.
+         *   4. Symbol in this context resolves to the global Symbol object
+         */
+        function checkThatExpressionIsProperSymbolReference(expression, expressionType, reportError) {
+            if (expressionType === unknownType) {
+                // There is already an error, so no need to report one.
+                return false;
+            }
+            if (!ts.isWellKnownSymbolSyntactically(expression)) {
+                return false;
+            }
+            // Make sure the property type is the primitive symbol type
+            if ((expressionType.flags & 16777216 /* ESSymbol */) === 0) {
+                if (reportError) {
+                    error(expression, ts.Diagnostics.A_computed_property_name_of_the_form_0_must_be_of_type_symbol, ts.getTextOfNode(expression));
+                }
+                return false;
+            }
+            // The name is Symbol.<someName>, so make sure Symbol actually resolves to the
+            // global Symbol object
+            var leftHandSide = expression.expression;
+            var leftHandSideSymbol = getResolvedSymbol(leftHandSide);
+            if (!leftHandSideSymbol) {
+                return false;
+            }
+            var globalESSymbol = getGlobalESSymbolConstructorSymbol();
+            if (!globalESSymbol) {
+                // Already errored when we tried to look up the symbol
+                return false;
+            }
+            if (leftHandSideSymbol !== globalESSymbol) {
+                if (reportError) {
+                    error(leftHandSide, ts.Diagnostics.Symbol_reference_does_not_refer_to_the_global_Symbol_constructor_object);
+                }
+                return false;
+            }
+            return true;
+        }
+        function resolveUntypedCall(node) {
+            if (node.kind === 176 /* TaggedTemplateExpression */) {
+                checkExpression(node.template);
+            }
+            else if (node.kind !== 143 /* Decorator */) {
+                ts.forEach(node.arguments, function (argument) {
+                    checkExpression(argument);
+                });
+            }
+            return anySignature;
+        }
+        function resolveErrorCall(node) {
+            resolveUntypedCall(node);
+            return unknownSignature;
+        }
+        // Re-order candidate signatures into the result array. Assumes the result array to be empty.
+        // The candidate list orders groups in reverse, but within a group signatures are kept in declaration order
+        // A nit here is that we reorder only signatures that belong to the same symbol,
+        // so order how inherited signatures are processed is still preserved.
+        // interface A { (x: string): void }
+        // interface B extends A { (x: 'foo'): string }
+        // const b: B;
+        // b('foo') // <- here overloads should be processed as [(x:'foo'): string, (x: string): void]
+        function reorderCandidates(signatures, result) {
+            var lastParent;
+            var lastSymbol;
+            var cutoffIndex = 0;
+            var index;
+            var specializedIndex = -1;
+            var spliceIndex;
+            ts.Debug.assert(!result.length);
+            for (var _i = 0, signatures_2 = signatures; _i < signatures_2.length; _i++) {
+                var signature = signatures_2[_i];
+                var symbol = signature.declaration && getSymbolOfNode(signature.declaration);
+                var parent_9 = signature.declaration && signature.declaration.parent;
+                if (!lastSymbol || symbol === lastSymbol) {
+                    if (lastParent && parent_9 === lastParent) {
+                        index++;
+                    }
+                    else {
+                        lastParent = parent_9;
+                        index = cutoffIndex;
+                    }
+                }
+                else {
+                    // current declaration belongs to a different symbol
+                    // set cutoffIndex so re-orderings in the future won't change result set from 0 to cutoffIndex
+                    index = cutoffIndex = result.length;
+                    lastParent = parent_9;
+                }
+                lastSymbol = symbol;
+                // specialized signatures always need to be placed before non-specialized signatures regardless
+                // of the cutoff position; see GH#1133
+                if (signature.hasStringLiterals) {
+                    specializedIndex++;
+                    spliceIndex = specializedIndex;
+                    // The cutoff index always needs to be greater than or equal to the specialized signature index
+                    // in order to prevent non-specialized signatures from being added before a specialized
+                    // signature.
+                    cutoffIndex++;
+                }
+                else {
+                    spliceIndex = index;
+                }
+                result.splice(spliceIndex, 0, signature);
+            }
+        }
+        function getSpreadArgumentIndex(args) {
+            for (var i = 0; i < args.length; i++) {
+                var arg = args[i];
+                if (arg && arg.kind === 191 /* SpreadElementExpression */) {
+                    return i;
+                }
+            }
+            return -1;
+        }
+        function hasCorrectArity(node, args, signature, signatureHelpTrailingComma) {
+            if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+            var argCount; // Apparent number of arguments we will have in this call
+            var typeArguments; // Type arguments (undefined if none)
+            var callIsIncomplete; // In incomplete call we want to be lenient when we have too few arguments
+            var isDecorator;
+            var spreadArgIndex = -1;
+            if (node.kind === 176 /* TaggedTemplateExpression */) {
+                var tagExpression = node;
+                // Even if the call is incomplete, we'll have a missing expression as our last argument,
+                // so we can say the count is just the arg list length
+                argCount = args.length;
+                typeArguments = undefined;
+                if (tagExpression.template.kind === 189 /* TemplateExpression */) {
+                    // If a tagged template expression lacks a tail literal, the call is incomplete.
+                    // Specifically, a template only can end in a TemplateTail or a Missing literal.
+                    var templateExpression = tagExpression.template;
+                    var lastSpan = ts.lastOrUndefined(templateExpression.templateSpans);
+                    ts.Debug.assert(lastSpan !== undefined); // we should always have at least one span.
+                    callIsIncomplete = ts.nodeIsMissing(lastSpan.literal) || !!lastSpan.literal.isUnterminated;
+                }
+                else {
+                    // If the template didn't end in a backtick, or its beginning occurred right prior to EOF,
+                    // then this might actually turn out to be a TemplateHead in the future;
+                    // so we consider the call to be incomplete.
+                    var templateLiteral = tagExpression.template;
+                    ts.Debug.assert(templateLiteral.kind === 11 /* NoSubstitutionTemplateLiteral */);
+                    callIsIncomplete = !!templateLiteral.isUnterminated;
+                }
+            }
+            else if (node.kind === 143 /* Decorator */) {
+                isDecorator = true;
+                typeArguments = undefined;
+                argCount = getEffectiveArgumentCount(node, /*args*/ undefined, signature);
+            }
+            else {
+                var callExpression = node;
+                if (!callExpression.arguments) {
+                    // This only happens when we have something of the form: 'new C'
+                    ts.Debug.assert(callExpression.kind === 175 /* NewExpression */);
+                    return signature.minArgumentCount === 0;
+                }
+                argCount = signatureHelpTrailingComma ? args.length + 1 : args.length;
+                // If we are missing the close paren, the call is incomplete.
+                callIsIncomplete = callExpression.arguments.end === callExpression.end;
+                typeArguments = callExpression.typeArguments;
+                spreadArgIndex = getSpreadArgumentIndex(args);
+            }
+            // If the user supplied type arguments, but the number of type arguments does not match
+            // the declared number of type parameters, the call has an incorrect arity.
+            var hasRightNumberOfTypeArgs = !typeArguments ||
+                (signature.typeParameters && typeArguments.length === signature.typeParameters.length);
+            if (!hasRightNumberOfTypeArgs) {
+                return false;
+            }
+            // If spread arguments are present, check that they correspond to a rest parameter. If so, no
+            // further checking is necessary.
+            if (spreadArgIndex >= 0) {
+                return isRestParameterIndex(signature, spreadArgIndex);
+            }
+            // Too many arguments implies incorrect arity.
+            if (!signature.hasRestParameter && argCount > signature.parameters.length) {
+                return false;
+            }
+            // If the call is incomplete, we should skip the lower bound check.
+            var hasEnoughArguments = argCount >= signature.minArgumentCount;
+            return callIsIncomplete || hasEnoughArguments;
+        }
+        // If type has a single call signature and no other members, return that signature. Otherwise, return undefined.
+        function getSingleCallSignature(type) {
+            if (type.flags & 80896 /* ObjectType */) {
+                var resolved = resolveStructuredTypeMembers(type);
+                if (resolved.callSignatures.length === 1 && resolved.constructSignatures.length === 0 &&
+                    resolved.properties.length === 0 && !resolved.stringIndexInfo && !resolved.numberIndexInfo) {
+                    return resolved.callSignatures[0];
+                }
+            }
+            return undefined;
+        }
+        // Instantiate a generic signature in the context of a non-generic signature (section 3.8.5 in TypeScript spec)
+        function instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper) {
+            var context = createInferenceContext(signature.typeParameters, /*inferUnionTypes*/ true);
+            forEachMatchingParameterType(contextualSignature, signature, function (source, target) {
+                // Type parameters from outer context referenced by source type are fixed by instantiation of the source type
+                inferTypes(context, instantiateType(source, contextualMapper), target);
+            });
+            return getSignatureInstantiation(signature, getInferredTypes(context));
+        }
+        function inferTypeArguments(node, signature, args, excludeArgument, context) {
+            var typeParameters = signature.typeParameters;
+            var inferenceMapper = getInferenceMapper(context);
+            // Clear out all the inference results from the last time inferTypeArguments was called on this context
+            for (var i = 0; i < typeParameters.length; i++) {
+                // As an optimization, we don't have to clear (and later recompute) inferred types
+                // for type parameters that have already been fixed on the previous call to inferTypeArguments.
+                // It would be just as correct to reset all of them. But then we'd be repeating the same work
+                // for the type parameters that were fixed, namely the work done by getInferredType.
+                if (!context.inferences[i].isFixed) {
+                    context.inferredTypes[i] = undefined;
+                }
+            }
+            // On this call to inferTypeArguments, we may get more inferences for certain type parameters that were not
+            // fixed last time. This means that a type parameter that failed inference last time may succeed this time,
+            // or vice versa. Therefore, the failedTypeParameterIndex is useless if it points to an unfixed type parameter,
+            // because it may change. So here we reset it. However, getInferredType will not revisit any type parameters
+            // that were previously fixed. So if a fixed type parameter failed previously, it will fail again because
+            // it will contain the exact same set of inferences. So if we reset the index from a fixed type parameter,
+            // we will lose information that we won't recover this time around.
+            if (context.failedTypeParameterIndex !== undefined && !context.inferences[context.failedTypeParameterIndex].isFixed) {
+                context.failedTypeParameterIndex = undefined;
+            }
+            if (signature.thisType) {
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                inferTypes(context, thisArgumentType, signature.thisType);
+            }
+            // We perform two passes over the arguments. In the first pass we infer from all arguments, but use
+            // wildcards for all context sensitive function expressions.
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
+                if (arg === undefined || arg.kind !== 193 /* OmittedExpression */) {
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i, arg);
+                    // If the effective argument type is 'undefined', there is no synthetic type
+                    // for the argument. In that case, we should check the argument.
+                    if (argType === undefined) {
+                        // For context sensitive arguments we pass the identityMapper, which is a signal to treat all
+                        // context sensitive function expressions as wildcards
+                        var mapper = excludeArgument && excludeArgument[i] !== undefined ? identityMapper : inferenceMapper;
+                        argType = checkExpressionWithContextualType(arg, paramType, mapper);
+                    }
+                    inferTypes(context, argType, paramType);
+                }
+            }
+            // In the second pass we visit only context sensitive arguments, and only those that aren't excluded, this
+            // time treating function expressions normally (which may cause previously inferred type arguments to be fixed
+            // as we construct types for contextually typed parameters)
+            // Decorators will not have `excludeArgument`, as their arguments cannot be contextually typed.
+            // Tagged template expressions will always have `undefined` for `excludeArgument[0]`.
+            if (excludeArgument) {
+                for (var i = 0; i < argCount; i++) {
+                    // No need to check for omitted args and template expressions, their exclusion value is always undefined
+                    if (excludeArgument[i] === false) {
+                        var arg = args[i];
+                        var paramType = getTypeAtPosition(signature, i);
+                        inferTypes(context, checkExpressionWithContextualType(arg, paramType, inferenceMapper), paramType);
+                    }
+                }
+            }
+            getInferredTypes(context);
+        }
+        function checkTypeArguments(signature, typeArgumentNodes, typeArgumentTypes, reportErrors, headMessage) {
+            var typeParameters = signature.typeParameters;
+            var typeArgumentsAreAssignable = true;
+            var mapper;
+            for (var i = 0; i < typeParameters.length; i++) {
+                if (typeArgumentsAreAssignable /* so far */) {
+                    var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                    if (constraint) {
+                        var errorInfo = void 0;
+                        var typeArgumentHeadMessage = ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1;
+                        if (reportErrors && headMessage) {
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, typeArgumentHeadMessage);
+                            typeArgumentHeadMessage = headMessage;
+                        }
+                        if (!mapper) {
+                            mapper = createTypeMapper(typeParameters, typeArgumentTypes);
+                        }
+                        var typeArgument = typeArgumentTypes[i];
+                        typeArgumentsAreAssignable = checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), reportErrors ? typeArgumentNodes[i] : undefined, typeArgumentHeadMessage, errorInfo);
+                    }
+                }
+            }
+            return typeArgumentsAreAssignable;
+        }
+        function checkApplicableSignature(node, args, signature, relation, excludeArgument, reportErrors) {
+            if (signature.thisType && signature.thisType !== voidType && node.kind !== 175 /* NewExpression */) {
+                // If the called expression is not of the form `x.f` or `x["f"]`, then sourceType = voidType
+                // If the signature's 'this' type is voidType, then the check is skipped -- anything is compatible.
+                // If the expression is a new expression, then the check is skipped.
+                var thisArgumentNode = getThisArgumentOfCall(node);
+                var thisArgumentType = thisArgumentNode ? checkExpression(thisArgumentNode) : voidType;
+                var errorNode = reportErrors ? (thisArgumentNode || node) : undefined;
+                var headMessage_1 = ts.Diagnostics.The_this_context_of_type_0_is_not_assignable_to_method_s_this_of_type_1;
+                if (!checkTypeRelatedTo(thisArgumentType, signature.thisType, relation, errorNode, headMessage_1)) {
+                    return false;
+                }
+            }
+            var headMessage = ts.Diagnostics.Argument_of_type_0_is_not_assignable_to_parameter_of_type_1;
+            var argCount = getEffectiveArgumentCount(node, args, signature);
+            for (var i = 0; i < argCount; i++) {
+                var arg = getEffectiveArgument(node, args, i);
+                // If the effective argument is 'undefined', then it is an argument that is present but is synthetic.
+                if (arg === undefined || arg.kind !== 193 /* OmittedExpression */) {
+                    // Check spread elements against rest type (from arity check we know spread argument corresponds to a rest parameter)
+                    var paramType = getTypeAtPosition(signature, i);
+                    var argType = getEffectiveArgumentType(node, i, arg);
+                    // If the effective argument type is 'undefined', there is no synthetic type
+                    // for the argument. In that case, we should check the argument.
+                    if (argType === undefined) {
+                        argType = arg.kind === 9 /* StringLiteral */ && !reportErrors
+                            ? getStringLiteralTypeForText(arg.text)
+                            : checkExpressionWithContextualType(arg, paramType, excludeArgument && excludeArgument[i] ? identityMapper : undefined);
+                    }
+                    // Use argument expression as error location when reporting errors
+                    var errorNode = reportErrors ? getEffectiveArgumentErrorNode(node, i, arg) : undefined;
+                    if (!checkTypeRelatedTo(argType, paramType, relation, errorNode, headMessage)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        /**
+         * Returns the this argument in calls like x.f(...) and x[f](...). Undefined otherwise.
+         */
+        function getThisArgumentOfCall(node) {
+            if (node.kind === 174 /* CallExpression */) {
+                var callee = node.expression;
+                if (callee.kind === 172 /* PropertyAccessExpression */) {
+                    return callee.expression;
+                }
+                else if (callee.kind === 173 /* ElementAccessExpression */) {
+                    return callee.expression;
+                }
+            }
+        }
+        /**
+         * Returns the effective arguments for an expression that works like a function invocation.
+         *
+         * If 'node' is a CallExpression or a NewExpression, then its argument list is returned.
+         * If 'node' is a TaggedTemplateExpression, a new argument list is constructed from the substitution
+         *    expressions, where the first element of the list is `undefined`.
+         * If 'node' is a Decorator, the argument list will be `undefined`, and its arguments and types
+         *    will be supplied from calls to `getEffectiveArgumentCount` and `getEffectiveArgumentType`.
+         */
+        function getEffectiveCallArguments(node) {
+            var args;
+            if (node.kind === 176 /* TaggedTemplateExpression */) {
+                var template = node.template;
+                args = [undefined];
+                if (template.kind === 189 /* TemplateExpression */) {
+                    ts.forEach(template.templateSpans, function (span) {
+                        args.push(span.expression);
+                    });
+                }
+            }
+            else if (node.kind === 143 /* Decorator */) {
+                // For a decorator, we return undefined as we will determine
+                // the number and types of arguments for a decorator using
+                // `getEffectiveArgumentCount` and `getEffectiveArgumentType` below.
+                return undefined;
+            }
+            else {
+                args = node.arguments || emptyArray;
+            }
+            return args;
+        }
+        /**
+          * Returns the effective argument count for a node that works like a function invocation.
+          * If 'node' is a Decorator, the number of arguments is derived from the decoration
+          *    target and the signature:
+          *    If 'node.target' is a class declaration or class expression, the effective argument
+          *       count is 1.
+          *    If 'node.target' is a parameter declaration, the effective argument count is 3.
+          *    If 'node.target' is a property declaration, the effective argument count is 2.
+          *    If 'node.target' is a method or accessor declaration, the effective argument count
+          *       is 3, although it can be 2 if the signature only accepts two arguments, allowing
+          *       us to match a property decorator.
+          * Otherwise, the argument count is the length of the 'args' array.
+          */
+        function getEffectiveArgumentCount(node, args, signature) {
+            if (node.kind === 143 /* Decorator */) {
+                switch (node.parent.kind) {
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                        // A class decorator will have one argument (see `ClassDecorator` in core.d.ts)
+                        return 1;
+                    case 145 /* PropertyDeclaration */:
+                        // A property declaration decorator will have two arguments (see
+                        // `PropertyDecorator` in core.d.ts)
+                        return 2;
+                    case 147 /* MethodDeclaration */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        // A method or accessor declaration decorator will have two or three arguments (see
+                        // `PropertyDecorator` and `MethodDecorator` in core.d.ts)
+                        // If we are emitting decorators for ES3, we will only pass two arguments.
+                        if (languageVersion === 0 /* ES3 */) {
+                            return 2;
+                        }
+                        // If the method decorator signature only accepts a target and a key, we will only
+                        // type check those arguments.
+                        return signature.parameters.length >= 3 ? 3 : 2;
+                    case 142 /* Parameter */:
+                        // A parameter declaration decorator will have three arguments (see
+                        // `ParameterDecorator` in core.d.ts)
+                        return 3;
+                }
+            }
+            else {
+                return args.length;
+            }
+        }
+        /**
+          * Returns the effective type of the first argument to a decorator.
+          * If 'node' is a class declaration or class expression, the effective argument type
+          *    is the type of the static side of the class.
+          * If 'node' is a parameter declaration, the effective argument type is either the type
+          *    of the static or instance side of the class for the parameter's parent method,
+          *    depending on whether the method is declared static.
+          *    For a constructor, the type is always the type of the static side of the class.
+          * If 'node' is a property, method, or accessor declaration, the effective argument
+          *    type is the type of the static or instance side of the parent class for class
+          *    element, depending on whether the element is declared static.
+          */
+        function getEffectiveDecoratorFirstArgumentType(node) {
+            // The first argument to a decorator is its `target`.
+            if (node.kind === 221 /* ClassDeclaration */) {
+                // For a class decorator, the `target` is the type of the class (e.g. the
+                // "static" or "constructor" side of the class)
+                var classSymbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(classSymbol);
+            }
+            if (node.kind === 142 /* Parameter */) {
+                // For a parameter decorator, the `target` is the parent type of the
+                // parameter's containing method.
+                node = node.parent;
+                if (node.kind === 148 /* Constructor */) {
+                    var classSymbol = getSymbolOfNode(node);
+                    return getTypeOfSymbol(classSymbol);
+                }
+            }
+            if (node.kind === 145 /* PropertyDeclaration */ ||
+                node.kind === 147 /* MethodDeclaration */ ||
+                node.kind === 149 /* GetAccessor */ ||
+                node.kind === 150 /* SetAccessor */) {
+                // For a property or method decorator, the `target` is the
+                // "static"-side type of the parent of the member if the member is
+                // declared "static"; otherwise, it is the "instance"-side type of the
+                // parent of the member.
+                return getParentTypeOfClassElement(node);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        /**
+          * Returns the effective type for the second argument to a decorator.
+          * If 'node' is a parameter, its effective argument type is one of the following:
+          *    If 'node.parent' is a constructor, the effective argument type is 'any', as we
+          *       will emit `undefined`.
+          *    If 'node.parent' is a member with an identifier, numeric, or string literal name,
+          *       the effective argument type will be a string literal type for the member name.
+          *    If 'node.parent' is a computed property name, the effective argument type will
+          *       either be a symbol type or the string type.
+          * If 'node' is a member with an identifier, numeric, or string literal name, the
+          *    effective argument type will be a string literal type for the member name.
+          * If 'node' is a computed property name, the effective argument type will either
+          *    be a symbol type or the string type.
+          * A class decorator does not have a second argument type.
+          */
+        function getEffectiveDecoratorSecondArgumentType(node) {
+            // The second argument to a decorator is its `propertyKey`
+            if (node.kind === 221 /* ClassDeclaration */) {
+                ts.Debug.fail("Class decorators should not have a second synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 142 /* Parameter */) {
+                node = node.parent;
+                if (node.kind === 148 /* Constructor */) {
+                    // For a constructor parameter decorator, the `propertyKey` will be `undefined`.
+                    return anyType;
+                }
+            }
+            if (node.kind === 145 /* PropertyDeclaration */ ||
+                node.kind === 147 /* MethodDeclaration */ ||
+                node.kind === 149 /* GetAccessor */ ||
+                node.kind === 150 /* SetAccessor */) {
+                // The `propertyKey` for a property or method decorator will be a
+                // string literal type if the member name is an identifier, number, or string;
+                // otherwise, if the member name is a computed property name it will
+                // be either string or symbol.
+                var element = node;
+                switch (element.name.kind) {
+                    case 69 /* Identifier */:
+                    case 8 /* NumericLiteral */:
+                    case 9 /* StringLiteral */:
+                        return getStringLiteralTypeForText(element.name.text);
+                    case 140 /* ComputedPropertyName */:
+                        var nameType = checkComputedPropertyName(element.name);
+                        if (isTypeOfKind(nameType, 16777216 /* ESSymbol */)) {
+                            return nameType;
+                        }
+                        else {
+                            return stringType;
+                        }
+                    default:
+                        ts.Debug.fail("Unsupported property name.");
+                        return unknownType;
+                }
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        /**
+          * Returns the effective argument type for the third argument to a decorator.
+          * If 'node' is a parameter, the effective argument type is the number type.
+          * If 'node' is a method or accessor, the effective argument type is a
+          *    `TypedPropertyDescriptor<T>` instantiated with the type of the member.
+          * Class and property decorators do not have a third effective argument.
+          */
+        function getEffectiveDecoratorThirdArgumentType(node) {
+            // The third argument to a decorator is either its `descriptor` for a method decorator
+            // or its `parameterIndex` for a parameter decorator
+            if (node.kind === 221 /* ClassDeclaration */) {
+                ts.Debug.fail("Class decorators should not have a third synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 142 /* Parameter */) {
+                // The `parameterIndex` for a parameter decorator is always a number
+                return numberType;
+            }
+            if (node.kind === 145 /* PropertyDeclaration */) {
+                ts.Debug.fail("Property decorators should not have a third synthetic argument.");
+                return unknownType;
+            }
+            if (node.kind === 147 /* MethodDeclaration */ ||
+                node.kind === 149 /* GetAccessor */ ||
+                node.kind === 150 /* SetAccessor */) {
+                // The `descriptor` for a method decorator will be a `TypedPropertyDescriptor<T>`
+                // for the type of the member.
+                var propertyType = getTypeOfNode(node);
+                return createTypedPropertyDescriptorType(propertyType);
+            }
+            ts.Debug.fail("Unsupported decorator target.");
+            return unknownType;
+        }
+        /**
+          * Returns the effective argument type for the provided argument to a decorator.
+          */
+        function getEffectiveDecoratorArgumentType(node, argIndex) {
+            if (argIndex === 0) {
+                return getEffectiveDecoratorFirstArgumentType(node.parent);
+            }
+            else if (argIndex === 1) {
+                return getEffectiveDecoratorSecondArgumentType(node.parent);
+            }
+            else if (argIndex === 2) {
+                return getEffectiveDecoratorThirdArgumentType(node.parent);
+            }
+            ts.Debug.fail("Decorators should not have a fourth synthetic argument.");
+            return unknownType;
+        }
+        /**
+          * Gets the effective argument type for an argument in a call expression.
+          */
+        function getEffectiveArgumentType(node, argIndex, arg) {
+            // Decorators provide special arguments, a tagged template expression provides
+            // a special first argument, and string literals get string literal types
+            // unless we're reporting errors
+            if (node.kind === 143 /* Decorator */) {
+                return getEffectiveDecoratorArgumentType(node, argIndex);
+            }
+            else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) {
+                return getGlobalTemplateStringsArrayType();
+            }
+            // This is not a synthetic argument, so we return 'undefined'
+            // to signal that the caller needs to check the argument.
+            return undefined;
+        }
+        /**
+          * Gets the effective argument expression for an argument in a call expression.
+          */
+        function getEffectiveArgument(node, args, argIndex) {
+            // For a decorator or the first argument of a tagged template expression we return undefined.
+            if (node.kind === 143 /* Decorator */ ||
+                (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */)) {
+                return undefined;
+            }
+            return args[argIndex];
+        }
+        /**
+          * Gets the error node to use when reporting errors for an effective argument.
+          */
+        function getEffectiveArgumentErrorNode(node, argIndex, arg) {
+            if (node.kind === 143 /* Decorator */) {
+                // For a decorator, we use the expression of the decorator for error reporting.
+                return node.expression;
+            }
+            else if (argIndex === 0 && node.kind === 176 /* TaggedTemplateExpression */) {
+                // For a the first argument of a tagged template expression, we use the template of the tag for error reporting.
+                return node.template;
+            }
+            else {
+                return arg;
+            }
+        }
+        function resolveCall(node, signatures, candidatesOutArray, headMessage) {
+            var isTaggedTemplate = node.kind === 176 /* TaggedTemplateExpression */;
+            var isDecorator = node.kind === 143 /* Decorator */;
+            var typeArguments;
+            if (!isTaggedTemplate && !isDecorator) {
+                typeArguments = node.typeArguments;
+                // We already perform checking on the type arguments on the class declaration itself.
+                if (node.expression.kind !== 95 /* SuperKeyword */) {
+                    ts.forEach(typeArguments, checkSourceElement);
+                }
+            }
+            var candidates = candidatesOutArray || [];
+            // reorderCandidates fills up the candidates array directly
+            reorderCandidates(signatures, candidates);
+            if (!candidates.length) {
+                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+                return resolveErrorCall(node);
+            }
+            var args = getEffectiveCallArguments(node);
+            // The following applies to any value of 'excludeArgument[i]':
+            //    - true:      the argument at 'i' is susceptible to a one-time permanent contextual typing.
+            //    - undefined: the argument at 'i' is *not* susceptible to permanent contextual typing.
+            //    - false:     the argument at 'i' *was* and *has been* permanently contextually typed.
+            //
+            // The idea is that we will perform type argument inference & assignability checking once
+            // without using the susceptible parameters that are functions, and once more for each of those
+            // parameters, contextually typing each as we go along.
+            //
+            // For a tagged template, then the first argument be 'undefined' if necessary
+            // because it represents a TemplateStringsArray.
+            //
+            // For a decorator, no arguments are susceptible to contextual typing due to the fact
+            // decorators are applied to a declaration by the emitter, and not to an expression.
+            var excludeArgument;
+            if (!isDecorator) {
+                // We do not need to call `getEffectiveArgumentCount` here as it only
+                // applies when calculating the number of arguments for a decorator.
+                for (var i = isTaggedTemplate ? 1 : 0; i < args.length; i++) {
+                    if (isContextSensitive(args[i])) {
+                        if (!excludeArgument) {
+                            excludeArgument = new Array(args.length);
+                        }
+                        excludeArgument[i] = true;
+                    }
+                }
+            }
+            // The following variables are captured and modified by calls to chooseOverload.
+            // If overload resolution or type argument inference fails, we want to report the
+            // best error possible. The best error is one which says that an argument was not
+            // assignable to a parameter. This implies that everything else about the overload
+            // was fine. So if there is any overload that is only incorrect because of an
+            // argument, we will report an error on that one.
+            //
+            //     function foo(s: string) {}
+            //     function foo(n: number) {} // Report argument error on this overload
+            //     function foo() {}
+            //     foo(true);
+            //
+            // If none of the overloads even made it that far, there are two possibilities.
+            // There was a problem with type arguments for some overload, in which case
+            // report an error on that. Or none of the overloads even had correct arity,
+            // in which case give an arity error.
+            //
+            //     function foo<T>(x: T, y: T) {} // Report type argument inference error
+            //     function foo() {}
+            //     foo(0, true);
+            //
+            var candidateForArgumentError;
+            var candidateForTypeArgumentError;
+            var resultOfFailedInference;
+            var result;
+            // If we are in signature help, a trailing comma indicates that we intend to provide another argument,
+            // so we will only accept overloads with arity at least 1 higher than the current number of provided arguments.
+            var signatureHelpTrailingComma = candidatesOutArray && node.kind === 174 /* CallExpression */ && node.arguments.hasTrailingComma;
+            // Section 4.12.1:
+            // if the candidate list contains one or more signatures for which the type of each argument
+            // expression is a subtype of each corresponding parameter type, the return type of the first
+            // of those signatures becomes the return type of the function call.
+            // Otherwise, the return type of the first signature in the candidate list becomes the return
+            // type of the function call.
+            //
+            // Whether the call is an error is determined by assignability of the arguments. The subtype pass
+            // is just important for choosing the best signature. So in the case where there is only one
+            // signature, the subtype pass is useless. So skipping it is an optimization.
+            if (candidates.length > 1) {
+                result = chooseOverload(candidates, subtypeRelation, signatureHelpTrailingComma);
+            }
+            if (!result) {
+                // Reinitialize these pointers for round two
+                candidateForArgumentError = undefined;
+                candidateForTypeArgumentError = undefined;
+                resultOfFailedInference = undefined;
+                result = chooseOverload(candidates, assignableRelation, signatureHelpTrailingComma);
+            }
+            if (result) {
+                return result;
+            }
+            // No signatures were applicable. Now report errors based on the last applicable signature with
+            // no arguments excluded from assignability checks.
+            // If candidate is undefined, it means that no candidates had a suitable arity. In that case,
+            // skip the checkApplicableSignature check.
+            if (candidateForArgumentError) {
+                // excludeArgument is undefined, in this case also equivalent to [undefined, undefined, ...]
+                // The importance of excludeArgument is to prevent us from typing function expression parameters
+                // in arguments too early. If possible, we'd like to only type them once we know the correct
+                // overload. However, this matters for the case where the call is correct. When the call is
+                // an error, we don't need to exclude any arguments, although it would cause no harm to do so.
+                checkApplicableSignature(node, args, candidateForArgumentError, assignableRelation, /*excludeArgument*/ undefined, /*reportErrors*/ true);
+            }
+            else if (candidateForTypeArgumentError) {
+                if (!isTaggedTemplate && !isDecorator && typeArguments) {
+                    var typeArguments_2 = node.typeArguments;
+                    checkTypeArguments(candidateForTypeArgumentError, typeArguments_2, ts.map(typeArguments_2, getTypeFromTypeNode), /*reportErrors*/ true, headMessage);
+                }
+                else {
+                    ts.Debug.assert(resultOfFailedInference.failedTypeParameterIndex >= 0);
+                    var failedTypeParameter = candidateForTypeArgumentError.typeParameters[resultOfFailedInference.failedTypeParameterIndex];
+                    var inferenceCandidates = getInferenceCandidates(resultOfFailedInference, resultOfFailedInference.failedTypeParameterIndex);
+                    var diagnosticChainHead = ts.chainDiagnosticMessages(/*details*/ undefined, // details will be provided by call to reportNoCommonSupertypeError
+                    ts.Diagnostics.The_type_argument_for_type_parameter_0_cannot_be_inferred_from_the_usage_Consider_specifying_the_type_arguments_explicitly, typeToString(failedTypeParameter));
+                    if (headMessage) {
+                        diagnosticChainHead = ts.chainDiagnosticMessages(diagnosticChainHead, headMessage);
+                    }
+                    reportNoCommonSupertypeError(inferenceCandidates, node.expression || node.tag, diagnosticChainHead);
+                }
+            }
+            else {
+                reportError(ts.Diagnostics.Supplied_parameters_do_not_match_any_signature_of_call_target);
+            }
+            // No signature was applicable. We have already reported the errors for the invalid signature.
+            // If this is a type resolution session, e.g. Language Service, try to get better information that anySignature.
+            // Pick the first candidate that matches the arity. This way we can get a contextual type for cases like:
+            //  declare function f(a: { xa: number; xb: number; });
+            //  f({ |
+            if (!produceDiagnostics) {
+                for (var _i = 0, candidates_1 = candidates; _i < candidates_1.length; _i++) {
+                    var candidate = candidates_1[_i];
+                    if (hasCorrectArity(node, args, candidate)) {
+                        if (candidate.typeParameters && typeArguments) {
+                            candidate = getSignatureInstantiation(candidate, ts.map(typeArguments, getTypeFromTypeNode));
+                        }
+                        return candidate;
+                    }
+                }
+            }
+            return resolveErrorCall(node);
+            function reportError(message, arg0, arg1, arg2) {
+                var errorInfo;
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, message, arg0, arg1, arg2);
+                if (headMessage) {
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
+                }
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+            }
+            function chooseOverload(candidates, relation, signatureHelpTrailingComma) {
+                if (signatureHelpTrailingComma === void 0) { signatureHelpTrailingComma = false; }
+                for (var _i = 0, candidates_2 = candidates; _i < candidates_2.length; _i++) {
+                    var originalCandidate = candidates_2[_i];
+                    if (!hasCorrectArity(node, args, originalCandidate, signatureHelpTrailingComma)) {
+                        continue;
+                    }
+                    var candidate = void 0;
+                    var typeArgumentsAreValid = void 0;
+                    var inferenceContext = originalCandidate.typeParameters
+                        ? createInferenceContext(originalCandidate.typeParameters, /*inferUnionTypes*/ false)
+                        : undefined;
+                    while (true) {
+                        candidate = originalCandidate;
+                        if (candidate.typeParameters) {
+                            var typeArgumentTypes = void 0;
+                            if (typeArguments) {
+                                typeArgumentTypes = ts.map(typeArguments, getTypeFromTypeNode);
+                                typeArgumentsAreValid = checkTypeArguments(candidate, typeArguments, typeArgumentTypes, /*reportErrors*/ false);
+                            }
+                            else {
+                                inferTypeArguments(node, candidate, args, excludeArgument, inferenceContext);
+                                typeArgumentsAreValid = inferenceContext.failedTypeParameterIndex === undefined;
+                                typeArgumentTypes = inferenceContext.inferredTypes;
+                            }
+                            if (!typeArgumentsAreValid) {
+                                break;
+                            }
+                            candidate = getSignatureInstantiation(candidate, typeArgumentTypes);
+                        }
+                        if (!checkApplicableSignature(node, args, candidate, relation, excludeArgument, /*reportErrors*/ false)) {
+                            break;
+                        }
+                        var index = excludeArgument ? ts.indexOf(excludeArgument, true) : -1;
+                        if (index < 0) {
+                            return candidate;
+                        }
+                        excludeArgument[index] = false;
+                    }
+                    // A post-mortem of this iteration of the loop. The signature was not applicable,
+                    // so we want to track it as a candidate for reporting an error. If the candidate
+                    // had no type parameters, or had no issues related to type arguments, we can
+                    // report an error based on the arguments. If there was an issue with type
+                    // arguments, then we can only report an error based on the type arguments.
+                    if (originalCandidate.typeParameters) {
+                        var instantiatedCandidate = candidate;
+                        if (typeArgumentsAreValid) {
+                            candidateForArgumentError = instantiatedCandidate;
+                        }
+                        else {
+                            candidateForTypeArgumentError = originalCandidate;
+                            if (!typeArguments) {
+                                resultOfFailedInference = inferenceContext;
+                            }
+                        }
+                    }
+                    else {
+                        ts.Debug.assert(originalCandidate === candidate);
+                        candidateForArgumentError = originalCandidate;
+                    }
+                }
+                return undefined;
+            }
+        }
+        function resolveCallExpression(node, candidatesOutArray) {
+            if (node.expression.kind === 95 /* SuperKeyword */) {
+                var superType = checkSuperExpression(node.expression);
+                if (superType !== unknownType) {
+                    // In super call, the candidate signatures are the matching arity signatures of the base constructor function instantiated
+                    // with the type arguments specified in the extends clause.
+                    var baseTypeNode = ts.getClassExtendsHeritageClauseElement(ts.getContainingClass(node));
+                    if (baseTypeNode) {
+                        var baseConstructors = getInstantiatedConstructorsForTypeArguments(superType, baseTypeNode.typeArguments);
+                        return resolveCall(node, baseConstructors, candidatesOutArray);
+                    }
+                }
+                return resolveUntypedCall(node);
+            }
+            var funcType = checkNonNullExpression(node.expression);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
+            }
+            // Technically, this signatures list may be incomplete. We are taking the apparent type,
+            // but we are not including call signatures that may have been added to the Object or
+            // Function interface, since they have none by default. This is a bit of a leap of faith
+            // that the user will not add any.
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            var constructSignatures = getSignaturesOfType(apparentType, 1 /* Construct */);
+            // TS 1.0 spec: 4.12
+            // If FuncExpr is of type Any, or of an object type that has no call or construct signatures
+            // but is a subtype of the Function interface, the call is an untyped function call. In an
+            // untyped function call no TypeArgs are permitted, Args can be any argument list, no contextual
+            // types are provided for the argument expressions, and the result is always of type Any.
+            // We exclude union types because we may have a union of function types that happen to have
+            // no common signatures.
+            if (isTypeAny(funcType) ||
+                (isTypeAny(apparentType) && funcType.flags & 512 /* TypeParameter */) ||
+                (!callSignatures.length && !constructSignatures.length && !(funcType.flags & 16384 /* Union */) && isTypeAssignableTo(funcType, globalFunctionType))) {
+                // The unknownType indicates that an error already occurred (and was reported).  No
+                // need to report another error in this case.
+                if (funcType !== unknownType && node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+                }
+                return resolveUntypedCall(node);
+            }
+            // If FuncExpr's apparent type(section 3.8.1) is a function type, the call is a typed function call.
+            // TypeScript employs overload resolution in typed function calls in order to support functions
+            // with multiple call signatures.
+            if (!callSignatures.length) {
+                if (constructSignatures.length) {
+                    error(node, ts.Diagnostics.Value_of_type_0_is_not_callable_Did_you_mean_to_include_new, typeToString(funcType));
+                }
+                else {
+                    error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                }
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray);
+        }
+        function resolveNewExpression(node, candidatesOutArray) {
+            if (node.arguments && languageVersion < 1 /* ES5 */) {
+                var spreadIndex = getSpreadArgumentIndex(node.arguments);
+                if (spreadIndex >= 0) {
+                    error(node.arguments[spreadIndex], ts.Diagnostics.Spread_operator_in_new_expressions_is_only_available_when_targeting_ECMAScript_5_and_higher);
+                }
+            }
+            var expressionType = checkNonNullExpression(node.expression);
+            // If expressionType's apparent type(section 3.8.1) is an object type with one or
+            // more construct signatures, the expression is processed in the same manner as a
+            // function call, but using the construct signatures as the initial set of candidate
+            // signatures for overload resolution. The result type of the function call becomes
+            // the result type of the operation.
+            expressionType = getApparentType(expressionType);
+            if (expressionType === unknownType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
+            }
+            // If the expression is a class of abstract type, then it cannot be instantiated.
+            // Note, only class declarations can be declared abstract.
+            // In the case of a merged class-module or class-interface declaration,
+            // only the class declaration node will have the Abstract flag set.
+            var valueDecl = expressionType.symbol && getClassLikeDeclarationOfSymbol(expressionType.symbol);
+            if (valueDecl && valueDecl.flags & 128 /* Abstract */) {
+                error(node, ts.Diagnostics.Cannot_create_an_instance_of_the_abstract_class_0, ts.declarationNameToString(valueDecl.name));
+                return resolveErrorCall(node);
+            }
+            // TS 1.0 spec: 4.11
+            // If expressionType is of type Any, Args can be any argument
+            // list and the result of the operation is of type Any.
+            if (isTypeAny(expressionType)) {
+                if (node.typeArguments) {
+                    error(node, ts.Diagnostics.Untyped_function_calls_may_not_accept_type_arguments);
+                }
+                return resolveUntypedCall(node);
+            }
+            // Technically, this signatures list may be incomplete. We are taking the apparent type,
+            // but we are not including construct signatures that may have been added to the Object or
+            // Function interface, since they have none by default. This is a bit of a leap of faith
+            // that the user will not add any.
+            var constructSignatures = getSignaturesOfType(expressionType, 1 /* Construct */);
+            if (constructSignatures.length) {
+                if (!isConstructorAccessible(node, constructSignatures[0])) {
+                    return resolveErrorCall(node);
+                }
+                return resolveCall(node, constructSignatures, candidatesOutArray);
+            }
+            // If expressionType's apparent type is an object type with no construct signatures but
+            // one or more call signatures, the expression is processed as a function call. A compile-time
+            // error occurs if the result of the function call is not Void. The type of the result of the
+            // operation is Any. It is an error to have a Void this type.
+            var callSignatures = getSignaturesOfType(expressionType, 0 /* Call */);
+            if (callSignatures.length) {
+                var signature = resolveCall(node, callSignatures, candidatesOutArray);
+                if (getReturnTypeOfSignature(signature) !== voidType) {
+                    error(node, ts.Diagnostics.Only_a_void_function_can_be_called_with_the_new_keyword);
+                }
+                if (signature.thisType === voidType) {
+                    error(node, ts.Diagnostics.A_function_that_is_called_with_the_new_keyword_cannot_have_a_this_type_that_is_void);
+                }
+                return signature;
+            }
+            error(node, ts.Diagnostics.Cannot_use_new_with_an_expression_whose_type_lacks_a_call_or_construct_signature);
+            return resolveErrorCall(node);
+        }
+        function isConstructorAccessible(node, signature) {
+            if (!signature || !signature.declaration) {
+                return true;
+            }
+            var declaration = signature.declaration;
+            var flags = declaration.flags;
+            // Public constructor is accessible.
+            if (!(flags & (8 /* Private */ | 16 /* Protected */))) {
+                return true;
+            }
+            var declaringClassDeclaration = getClassLikeDeclarationOfSymbol(declaration.parent.symbol);
+            var declaringClass = getDeclaredTypeOfSymbol(declaration.parent.symbol);
+            // A private or protected constructor can only be instantiated within it's own class
+            if (!isNodeWithinClass(node, declaringClassDeclaration)) {
+                if (flags & 8 /* Private */) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_private_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                if (flags & 16 /* Protected */) {
+                    error(node, ts.Diagnostics.Constructor_of_class_0_is_protected_and_only_accessible_within_the_class_declaration, typeToString(declaringClass));
+                }
+                return false;
+            }
+            return true;
+        }
+        function resolveTaggedTemplateExpression(node, candidatesOutArray) {
+            var tagType = checkExpression(node.tag);
+            var apparentType = getApparentType(tagType);
+            if (apparentType === unknownType) {
+                // Another error has already been reported
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            if (isTypeAny(tagType) || (!callSignatures.length && !(tagType.flags & 16384 /* Union */) && isTypeAssignableTo(tagType, globalFunctionType))) {
+                return resolveUntypedCall(node);
+            }
+            if (!callSignatures.length) {
+                error(node, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray);
+        }
+        /**
+          * Gets the localized diagnostic head message to use for errors when resolving a decorator as a call expression.
+          */
+        function getDiagnosticHeadMessageForDecoratorResolution(node) {
+            switch (node.parent.kind) {
+                case 221 /* ClassDeclaration */:
+                case 192 /* ClassExpression */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_class_decorator_when_called_as_an_expression;
+                case 142 /* Parameter */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_parameter_decorator_when_called_as_an_expression;
+                case 145 /* PropertyDeclaration */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_property_decorator_when_called_as_an_expression;
+                case 147 /* MethodDeclaration */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                    return ts.Diagnostics.Unable_to_resolve_signature_of_method_decorator_when_called_as_an_expression;
+            }
+        }
+        /**
+          * Resolves a decorator as if it were a call expression.
+          */
+        function resolveDecorator(node, candidatesOutArray) {
+            var funcType = checkExpression(node.expression);
+            var apparentType = getApparentType(funcType);
+            if (apparentType === unknownType) {
+                return resolveErrorCall(node);
+            }
+            var callSignatures = getSignaturesOfType(apparentType, 0 /* Call */);
+            if (funcType === anyType || (!callSignatures.length && !(funcType.flags & 16384 /* Union */) && isTypeAssignableTo(funcType, globalFunctionType))) {
+                return resolveUntypedCall(node);
+            }
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            if (!callSignatures.length) {
+                var errorInfo = void 0;
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Cannot_invoke_an_expression_whose_type_lacks_a_call_signature);
+                errorInfo = ts.chainDiagnosticMessages(errorInfo, headMessage);
+                diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(node, errorInfo));
+                return resolveErrorCall(node);
+            }
+            return resolveCall(node, callSignatures, candidatesOutArray, headMessage);
+        }
+        function resolveSignature(node, candidatesOutArray) {
+            switch (node.kind) {
+                case 174 /* CallExpression */:
+                    return resolveCallExpression(node, candidatesOutArray);
+                case 175 /* NewExpression */:
+                    return resolveNewExpression(node, candidatesOutArray);
+                case 176 /* TaggedTemplateExpression */:
+                    return resolveTaggedTemplateExpression(node, candidatesOutArray);
+                case 143 /* Decorator */:
+                    return resolveDecorator(node, candidatesOutArray);
+            }
+            ts.Debug.fail("Branch in 'resolveSignature' should be unreachable.");
+        }
+        // candidatesOutArray is passed by signature help in the language service, and collectCandidates
+        // must fill it up with the appropriate candidate signatures
+        function getResolvedSignature(node, candidatesOutArray) {
+            var links = getNodeLinks(node);
+            // If getResolvedSignature has already been called, we will have cached the resolvedSignature.
+            // However, it is possible that either candidatesOutArray was not passed in the first time,
+            // or that a different candidatesOutArray was passed in. Therefore, we need to redo the work
+            // to correctly fill the candidatesOutArray.
+            var cached = links.resolvedSignature;
+            if (cached && cached !== anySignature && !candidatesOutArray) {
+                return cached;
+            }
+            links.resolvedSignature = anySignature;
+            var result = resolveSignature(node, candidatesOutArray);
+            // If signature resolution originated in control flow type analysis (for example to compute the
+            // assigned type in a flow assignment) we don't cache the result as it may be based on temporary
+            // types from the control flow analysis.
+            links.resolvedSignature = flowLoopStart === flowLoopCount ? result : cached;
+            return result;
+        }
+        function getResolvedOrAnySignature(node) {
+            // If we're already in the process of resolving the given signature, don't resolve again as
+            // that could cause infinite recursion. Instead, return anySignature.
+            return getNodeLinks(node).resolvedSignature === anySignature ? anySignature : getResolvedSignature(node);
+        }
+        function getInferredClassType(symbol) {
+            var links = getSymbolLinks(symbol);
+            if (!links.inferredClassType) {
+                links.inferredClassType = createAnonymousType(undefined, symbol.members, emptyArray, emptyArray, /*stringIndexType*/ undefined, /*numberIndexType*/ undefined);
+            }
+            return links.inferredClassType;
+        }
+        /**
+         * Syntactically and semantically checks a call or new expression.
+         * @param node The call/new expression to be checked.
+         * @returns On success, the expression's signature's return type. On failure, anyType.
+         */
+        function checkCallExpression(node) {
+            // Grammar checking; stop grammar-checking if checkGrammarTypeArguments return true
+            checkGrammarTypeArguments(node, node.typeArguments) || checkGrammarArguments(node, node.arguments);
+            var signature = getResolvedSignature(node);
+            if (node.expression.kind === 95 /* SuperKeyword */) {
+                return voidType;
+            }
+            if (node.kind === 175 /* NewExpression */) {
+                var declaration = signature.declaration;
+                if (declaration &&
+                    declaration.kind !== 148 /* Constructor */ &&
+                    declaration.kind !== 152 /* ConstructSignature */ &&
+                    declaration.kind !== 157 /* ConstructorType */ &&
+                    !ts.isJSDocConstructSignature(declaration)) {
+                    // When resolved signature is a call signature (and not a construct signature) the result type is any, unless
+                    // the declaring function had members created through 'x.prototype.y = expr' or 'this.y = expr' psuedodeclarations
+                    // in a JS file
+                    var funcSymbol = checkExpression(node.expression).symbol;
+                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & 16 /* Function */)) {
+                        return getInferredClassType(funcSymbol);
+                    }
+                    else if (compilerOptions.noImplicitAny) {
+                        error(node, ts.Diagnostics.new_expression_whose_target_lacks_a_construct_signature_implicitly_has_an_any_type);
+                    }
+                    return anyType;
+                }
+            }
+            // In JavaScript files, calls to any identifier 'require' are treated as external module imports
+            if (ts.isInJavaScriptFile(node) && ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
+                return resolveExternalModuleTypeByLiteral(node.arguments[0]);
+            }
+            return getReturnTypeOfSignature(signature);
+        }
+        function checkTaggedTemplateExpression(node) {
+            return getReturnTypeOfSignature(getResolvedSignature(node));
+        }
+        function checkAssertion(node) {
+            var exprType = getRegularTypeOfObjectLiteral(checkExpression(node.expression));
+            var targetType = getTypeFromTypeNode(node.type);
+            if (produceDiagnostics && targetType !== unknownType) {
+                var widenedType = getWidenedType(exprType);
+                if (!isTypeComparableTo(targetType, widenedType)) {
+                    checkTypeComparableTo(exprType, targetType, node, ts.Diagnostics.Type_0_cannot_be_converted_to_type_1);
+                }
+            }
+            return targetType;
+        }
+        function checkNonNullAssertion(node) {
+            return getNonNullableType(checkExpression(node.expression));
+        }
+        function getTypeOfParameter(symbol) {
+            var type = getTypeOfSymbol(symbol);
+            if (strictNullChecks) {
+                var declaration = symbol.valueDeclaration;
+                if (declaration && declaration.initializer) {
+                    return addTypeKind(type, 32 /* Undefined */);
+                }
+            }
+            return type;
+        }
+        function getTypeAtPosition(signature, pos) {
+            return signature.hasRestParameter ?
+                pos < signature.parameters.length - 1 ? getTypeOfParameter(signature.parameters[pos]) : getRestTypeOfSignature(signature) :
+                pos < signature.parameters.length ? getTypeOfParameter(signature.parameters[pos]) : anyType;
+        }
+        function assignContextualParameterTypes(signature, context, mapper) {
+            var len = signature.parameters.length - (signature.hasRestParameter ? 1 : 0);
+            for (var i = 0; i < len; i++) {
+                var parameter = signature.parameters[i];
+                var contextualParameterType = getTypeAtPosition(context, i);
+                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            }
+            if (signature.hasRestParameter && isRestParameterIndex(context, signature.parameters.length - 1)) {
+                var parameter = ts.lastOrUndefined(signature.parameters);
+                var contextualParameterType = getTypeOfSymbol(ts.lastOrUndefined(context.parameters));
+                assignTypeToParameterAndFixTypeParameters(parameter, contextualParameterType, mapper);
+            }
+        }
+        // When contextual typing assigns a type to a parameter that contains a binding pattern, we also need to push
+        // the destructured type into the contained binding elements.
+        function assignBindingElementTypes(node) {
+            if (ts.isBindingPattern(node.name)) {
+                for (var _i = 0, _a = node.name.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (element.kind !== 193 /* OmittedExpression */) {
+                        if (element.name.kind === 69 /* Identifier */) {
+                            getSymbolLinks(getSymbolOfNode(element)).type = getTypeForBindingElement(element);
+                        }
+                        assignBindingElementTypes(element);
+                    }
+                }
+            }
+        }
+        function assignTypeToParameterAndFixTypeParameters(parameter, contextualType, mapper) {
+            var links = getSymbolLinks(parameter);
+            if (!links.type) {
+                links.type = instantiateType(contextualType, mapper);
+                // if inference didn't come up with anything but {}, fall back to the binding pattern if present.
+                if (links.type === emptyObjectType &&
+                    (parameter.valueDeclaration.name.kind === 167 /* ObjectBindingPattern */ ||
+                        parameter.valueDeclaration.name.kind === 168 /* ArrayBindingPattern */)) {
+                    links.type = getTypeFromBindingPattern(parameter.valueDeclaration.name);
+                }
+                assignBindingElementTypes(parameter.valueDeclaration);
+            }
+            else if (isInferentialContext(mapper)) {
+                // Even if the parameter already has a type, it might be because it was given a type while
+                // processing the function as an argument to a prior signature during overload resolution.
+                // If this was the case, it may have caused some type parameters to be fixed. So here,
+                // we need to ensure that type parameters at the same positions get fixed again. This is
+                // done by calling instantiateType to attach the mapper to the contextualType, and then
+                // calling inferTypes to force a walk of contextualType so that all the correct fixing
+                // happens. The choice to pass in links.type may seem kind of arbitrary, but it serves
+                // to make sure that all the correct positions in contextualType are reached by the walk.
+                // Here is an example:
+                //
+                //      interface Base {
+                //          baseProp;
+                //      }
+                //      interface Derived extends Base {
+                //          toBase(): Base;
+                //      }
+                //
+                //      var derived: Derived;
+                //
+                //      declare function foo<T>(x: T, func: (p: T) => T): T;
+                //      declare function foo<T>(x: T, func: (p: T) => T): T;
+                //
+                //      var result = foo(derived, d => d.toBase());
+                //
+                // We are typing d while checking the second overload. But we've already given d
+                // a type (Derived) from the first overload. However, we still want to fix the
+                // T in the second overload so that we do not infer Base as a candidate for T
+                // (inferring Base would make type argument inference inconsistent between the two
+                // overloads).
+                inferTypes(mapper.context, links.type, instantiateType(contextualType, mapper));
+            }
+        }
+        function getReturnTypeFromJSDocComment(func) {
+            var returnTag = ts.getJSDocReturnTag(func);
+            if (returnTag && returnTag.typeExpression) {
+                return getTypeFromTypeNode(returnTag.typeExpression.type);
+            }
+            return undefined;
+        }
+        function createPromiseType(promisedType) {
+            // creates a `Promise<T>` type where `T` is the promisedType argument
+            var globalPromiseType = getGlobalPromiseType();
+            if (globalPromiseType !== emptyGenericType) {
+                // if the promised type is itself a promise, get the underlying type; otherwise, fallback to the promised type
+                promisedType = getAwaitedType(promisedType);
+                return createTypeReference(globalPromiseType, [promisedType]);
+            }
+            return emptyObjectType;
+        }
+        function getReturnTypeFromBody(func, contextualMapper) {
+            var contextualSignature = getContextualSignatureForFunctionLikeDeclaration(func);
+            if (!func.body) {
+                return unknownType;
+            }
+            var isAsync = ts.isAsyncFunctionLike(func);
+            var type;
+            if (func.body.kind !== 199 /* Block */) {
+                type = checkExpressionCached(func.body, contextualMapper);
+                if (isAsync) {
+                    // From within an async function you can return either a non-promise value or a promise. Any
+                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+                    // return type of the body should be unwrapped to its awaited type, which we will wrap in
+                    // the native Promise<T> type later in this function.
+                    type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                }
+            }
+            else {
+                var types = void 0;
+                var funcIsGenerator = !!func.asteriskToken;
+                if (funcIsGenerator) {
+                    types = checkAndAggregateYieldOperandTypes(func, contextualMapper);
+                    if (types.length === 0) {
+                        var iterableIteratorAny = createIterableIteratorType(anyType);
+                        if (compilerOptions.noImplicitAny) {
+                            error(func.asteriskToken, ts.Diagnostics.Generator_implicitly_has_type_0_because_it_does_not_yield_any_values_Consider_supplying_a_return_type, typeToString(iterableIteratorAny));
+                        }
+                        return iterableIteratorAny;
+                    }
+                }
+                else {
+                    types = checkAndAggregateReturnExpressionTypes(func, contextualMapper);
+                    if (!types) {
+                        return neverType;
+                    }
+                    if (types.length === 0) {
+                        if (isAsync) {
+                            // For an async function, the return type will not be void, but rather a Promise for void.
+                            var promiseType = createPromiseType(voidType);
+                            if (promiseType === emptyObjectType) {
+                                error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+                                return unknownType;
+                            }
+                            return promiseType;
+                        }
+                        return voidType;
+                    }
+                }
+                // When yield/return statements are contextually typed we allow the return type to be a union type.
+                // Otherwise we require the yield/return expressions to have a best common supertype.
+                type = contextualSignature ? getUnionType(types) : getCommonSupertype(types);
+                if (!type) {
+                    if (funcIsGenerator) {
+                        error(func, ts.Diagnostics.No_best_common_type_exists_among_yield_expressions);
+                        return createIterableIteratorType(unknownType);
+                    }
+                    else {
+                        error(func, ts.Diagnostics.No_best_common_type_exists_among_return_expressions);
+                        // Defer to unioning the return types so we get a) downstream errors earlier and b) better Salsa experience
+                        return getUnionType(types);
+                    }
+                }
+                if (funcIsGenerator) {
+                    type = createIterableIteratorType(type);
+                }
+            }
+            if (!contextualSignature) {
+                reportErrorsFromWidening(func, type);
+            }
+            var widenedType = getWidenedType(type);
+            if (isAsync) {
+                // From within an async function you can return either a non-promise value or a promise. Any
+                // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+                // return type of the body is awaited type of the body, wrapped in a native Promise<T> type.
+                var promiseType = createPromiseType(widenedType);
+                if (promiseType === emptyObjectType) {
+                    error(func, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+                    return unknownType;
+                }
+                return promiseType;
+            }
+            else {
+                return widenedType;
+            }
+        }
+        function checkAndAggregateYieldOperandTypes(func, contextualMapper) {
+            var aggregatedTypes = [];
+            ts.forEachYieldExpression(func.body, function (yieldExpression) {
+                var expr = yieldExpression.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, contextualMapper);
+                    if (yieldExpression.asteriskToken) {
+                        // A yield* expression effectively yields everything that its operand yields
+                        type = checkElementTypeOfIterable(type, yieldExpression.expression);
+                    }
+                    if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
+                    }
+                }
+            });
+            return aggregatedTypes;
+        }
+        function checkAndAggregateReturnExpressionTypes(func, contextualMapper) {
+            var isAsync = ts.isAsyncFunctionLike(func);
+            var aggregatedTypes = [];
+            var hasReturnWithNoExpression = !!(func.flags & 32768 /* HasImplicitReturn */);
+            var hasReturnOfTypeNever = false;
+            ts.forEachReturnStatement(func.body, function (returnStatement) {
+                var expr = returnStatement.expression;
+                if (expr) {
+                    var type = checkExpressionCached(expr, contextualMapper);
+                    if (isAsync) {
+                        // From within an async function you can return either a non-promise value or a promise. Any
+                        // Promise/A+ compatible implementation will always assimilate any foreign promise, so the
+                        // return type of the body should be unwrapped to its awaited type, which should be wrapped in
+                        // the native Promise<T> type by the caller.
+                        type = checkAwaitedType(type, func, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                    }
+                    if (type === neverType) {
+                        hasReturnOfTypeNever = true;
+                    }
+                    else if (!ts.contains(aggregatedTypes, type)) {
+                        aggregatedTypes.push(type);
+                    }
+                }
+                else {
+                    hasReturnWithNoExpression = true;
+                }
+            });
+            if (aggregatedTypes.length === 0 && !hasReturnWithNoExpression && (hasReturnOfTypeNever ||
+                func.kind === 179 /* FunctionExpression */ || func.kind === 180 /* ArrowFunction */)) {
+                return undefined;
+            }
+            if (strictNullChecks && aggregatedTypes.length && hasReturnWithNoExpression) {
+                if (!ts.contains(aggregatedTypes, undefinedType)) {
+                    aggregatedTypes.push(undefinedType);
+                }
+            }
+            return aggregatedTypes;
+        }
+        /**
+         * TypeScript Specification 1.0 (6.3) - July 2014
+         *   An explicitly typed function whose return type isn't the Void type,
+         *   the Any type, or a union type containing the Void or Any type as a constituent
+         *   must have at least one return statement somewhere in its body.
+         *   An exception to this rule is if the function implementation consists of a single 'throw' statement.
+         *
+         * @param returnType - return type of the function, can be undefined if return type is not explicitly specified
+         */
+        function checkAllCodePathsInNonVoidFunctionReturnOrThrow(func, returnType) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            // Functions with with an explicitly specified 'void' or 'any' return type don't need any return expressions.
+            if (returnType && maybeTypeOfKind(returnType, 1 /* Any */ | 16 /* Void */)) {
+                return;
+            }
+            // If all we have is a function signature, or an arrow function with an expression body, then there is nothing to check.
+            // also if HasImplicitReturn flag is not set this means that all codepaths in function body end with return or throw
+            if (ts.nodeIsMissing(func.body) || func.body.kind !== 199 /* Block */ || !(func.flags & 32768 /* HasImplicitReturn */)) {
+                return;
+            }
+            var hasExplicitReturn = func.flags & 65536 /* HasExplicitReturn */;
+            if (returnType === neverType) {
+                error(func.type, ts.Diagnostics.A_function_returning_never_cannot_have_a_reachable_end_point);
+            }
+            else if (returnType && !hasExplicitReturn) {
+                // minimal check: function has syntactic return type annotation and no explicit return statements in the body
+                // this function does not conform to the specification.
+                // NOTE: having returnType !== undefined is a precondition for entering this branch so func.type will always be present
+                error(func.type, ts.Diagnostics.A_function_whose_declared_type_is_neither_void_nor_any_must_return_a_value);
+            }
+            else if (returnType && strictNullChecks && !isTypeAssignableTo(undefinedType, returnType)) {
+                error(func.type, ts.Diagnostics.Function_lacks_ending_return_statement_and_return_type_does_not_include_undefined);
+            }
+            else if (compilerOptions.noImplicitReturns) {
+                if (!returnType) {
+                    // If return type annotation is omitted check if function has any explicit return statements.
+                    // If it does not have any - its inferred return type is void - don't do any checks.
+                    // Otherwise get inferred return type from function body and report error only if it is not void / anytype
+                    if (!hasExplicitReturn) {
+                        return;
+                    }
+                    var inferredReturnType = getReturnTypeOfSignature(getSignatureFromDeclaration(func));
+                    if (isUnwrappedReturnTypeVoidOrAny(func, inferredReturnType)) {
+                        return;
+                    }
+                }
+                error(func.type || func, ts.Diagnostics.Not_all_code_paths_return_a_value);
+            }
+        }
+        function checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper) {
+            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            // Grammar checking
+            var hasGrammarError = checkGrammarFunctionLikeDeclaration(node);
+            if (!hasGrammarError && node.kind === 179 /* FunctionExpression */) {
+                checkGrammarForGenerator(node);
+            }
+            // The identityMapper object is used to indicate that function expressions are wildcards
+            if (contextualMapper === identityMapper && isContextSensitive(node)) {
+                checkNodeDeferred(node);
+                return anyFunctionType;
+            }
+            var links = getNodeLinks(node);
+            var type = getTypeOfSymbol(node.symbol);
+            var contextSensitive = isContextSensitive(node);
+            var mightFixTypeParameters = contextSensitive && isInferentialContext(contextualMapper);
+            // Check if function expression is contextually typed and assign parameter types if so.
+            // See the comment in assignTypeToParameterAndFixTypeParameters to understand why we need to
+            // check mightFixTypeParameters.
+            if (mightFixTypeParameters || !(links.flags & 1024 /* ContextChecked */)) {
+                var contextualSignature = getContextualSignature(node);
+                // If a type check is started at a function expression that is an argument of a function call, obtaining the
+                // contextual type may recursively get back to here during overload resolution of the call. If so, we will have
+                // already assigned contextual types.
+                var contextChecked = !!(links.flags & 1024 /* ContextChecked */);
+                if (mightFixTypeParameters || !contextChecked) {
+                    links.flags |= 1024 /* ContextChecked */;
+                    if (contextualSignature) {
+                        var signature = getSignaturesOfType(type, 0 /* Call */)[0];
+                        if (contextSensitive) {
+                            assignContextualParameterTypes(signature, contextualSignature, contextualMapper || identityMapper);
+                        }
+                        if (mightFixTypeParameters || !node.type && !signature.resolvedReturnType) {
+                            var returnType = getReturnTypeFromBody(node, contextualMapper);
+                            if (!signature.resolvedReturnType) {
+                                signature.resolvedReturnType = returnType;
+                            }
+                        }
+                    }
+                    if (!contextChecked) {
+                        checkSignatureDeclaration(node);
+                        checkNodeDeferred(node);
+                    }
+                }
+            }
+            if (produceDiagnostics && node.kind !== 147 /* MethodDeclaration */ && node.kind !== 146 /* MethodSignature */) {
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+            }
+            return type;
+        }
+        function checkFunctionExpressionOrObjectLiteralMethodDeferred(node) {
+            ts.Debug.assert(node.kind !== 147 /* MethodDeclaration */ || ts.isObjectLiteralMethod(node));
+            var isAsync = ts.isAsyncFunctionLike(node);
+            var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
+            if (!node.asteriskToken) {
+                // return is not necessary in the body of generators
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (node.body) {
+                if (!node.type) {
+                    // There are some checks that are only performed in getReturnTypeFromBody, that may produce errors
+                    // we need. An example is the noImplicitAny errors resulting from widening the return expression
+                    // of a function. Because checking of function expression bodies is deferred, there was never an
+                    // appropriate time to do this during the main walk of the file (see the comment at the top of
+                    // checkFunctionExpressionBodies). So it must be done now.
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+                }
+                if (node.body.kind === 199 /* Block */) {
+                    checkSourceElement(node.body);
+                }
+                else {
+                    // From within an async function you can return either a non-promise value or a promise. Any
+                    // Promise/A+ compatible implementation will always assimilate any foreign promise, so we
+                    // should not be checking assignability of a promise to the return type. Instead, we need to
+                    // check assignability of the awaited type of the expression body against the promised type of
+                    // its return type annotation.
+                    var exprType = checkExpression(node.body);
+                    if (returnOrPromisedType) {
+                        if (isAsync) {
+                            var awaitedType = checkAwaitedType(exprType, node.body, ts.Diagnostics.Expression_body_for_async_arrow_function_does_not_have_a_valid_callable_then_member);
+                            checkTypeAssignableTo(awaitedType, returnOrPromisedType, node.body);
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnOrPromisedType, node.body);
+                        }
+                    }
+                }
+            }
+        }
+        function checkArithmeticOperandType(operand, type, diagnostic) {
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(type, 132 /* NumberLike */)) {
+                error(operand, diagnostic);
+                return false;
+            }
+            return true;
+        }
+        function isReadonlySymbol(symbol) {
+            // The following symbols are considered read-only:
+            // Properties with a 'readonly' modifier
+            // Variables declared with 'const'
+            // Get accessors without matching set accessors
+            // Enum members
+            return symbol.flags & 4 /* Property */ && (getDeclarationFlagsFromSymbol(symbol) & 64 /* Readonly */) !== 0 ||
+                symbol.flags & 3 /* Variable */ && (getDeclarationFlagsFromSymbol(symbol) & 2048 /* Const */) !== 0 ||
+                symbol.flags & 98304 /* Accessor */ && !(symbol.flags & 65536 /* SetAccessor */) ||
+                (symbol.flags & 8 /* EnumMember */) !== 0;
+        }
+        function isReferenceToReadonlyEntity(expr, symbol) {
+            if (isReadonlySymbol(symbol)) {
+                // Allow assignments to readonly properties within constructors of the same class declaration.
+                if (symbol.flags & 4 /* Property */ &&
+                    (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) &&
+                    expr.expression.kind === 97 /* ThisKeyword */) {
+                    // Look for if this is the constructor for the class that `symbol` is a property of.
+                    var func = ts.getContainingFunction(expr);
+                    if (!(func && func.kind === 148 /* Constructor */))
+                        return true;
+                    // If func.parent is a class and symbol is a (readonly) property of that class, or
+                    // if func is a constructor and symbol is a (readonly) parameter property declared in it,
+                    // then symbol is writeable here.
+                    return !(func.parent === symbol.valueDeclaration.parent || func === symbol.valueDeclaration.parent);
+                }
+                return true;
+            }
+            return false;
+        }
+        function isReferenceThroughNamespaceImport(expr) {
+            if (expr.kind === 172 /* PropertyAccessExpression */ || expr.kind === 173 /* ElementAccessExpression */) {
+                var node = skipParenthesizedNodes(expr.expression);
+                if (node.kind === 69 /* Identifier */) {
+                    var symbol = getNodeLinks(node).resolvedSymbol;
+                    if (symbol.flags & 8388608 /* Alias */) {
+                        var declaration = getDeclarationOfAliasSymbol(symbol);
+                        return declaration && declaration.kind === 232 /* NamespaceImport */;
+                    }
+                }
+            }
+            return false;
+        }
+        function checkReferenceExpression(expr, invalidReferenceMessage, constantVariableMessage) {
+            // References are combinations of identifiers, parentheses, and property accesses.
+            var node = skipParenthesizedNodes(expr);
+            if (node.kind !== 69 /* Identifier */ && node.kind !== 172 /* PropertyAccessExpression */ && node.kind !== 173 /* ElementAccessExpression */) {
+                error(expr, invalidReferenceMessage);
+                return false;
+            }
+            // Because we get the symbol from the resolvedSymbol property, it might be of kind
+            // SymbolFlags.ExportValue. In this case it is necessary to get the actual export
+            // symbol, which will have the correct flags set on it.
+            var links = getNodeLinks(node);
+            var symbol = getExportSymbolOfValueSymbolIfExported(links.resolvedSymbol);
+            if (symbol) {
+                if (symbol !== unknownSymbol && symbol !== argumentsSymbol) {
+                    // Only variables (and not functions, classes, namespaces, enum objects, or enum members)
+                    // are considered references when referenced using a simple identifier.
+                    if (node.kind === 69 /* Identifier */ && !(symbol.flags & 3 /* Variable */)) {
+                        error(expr, invalidReferenceMessage);
+                        return false;
+                    }
+                    if (isReferenceToReadonlyEntity(node, symbol) || isReferenceThroughNamespaceImport(node)) {
+                        error(expr, constantVariableMessage);
+                        return false;
+                    }
+                }
+            }
+            else if (node.kind === 173 /* ElementAccessExpression */) {
+                if (links.resolvedIndexInfo && links.resolvedIndexInfo.isReadonly) {
+                    error(expr, constantVariableMessage);
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkDeleteExpression(node) {
+            checkExpression(node.expression);
+            return booleanType;
+        }
+        function checkTypeOfExpression(node) {
+            checkExpression(node.expression);
+            return stringType;
+        }
+        function checkVoidExpression(node) {
+            checkExpression(node.expression);
+            return undefinedWideningType;
+        }
+        function checkAwaitExpression(node) {
+            // Grammar checking
+            if (produceDiagnostics) {
+                if (!(node.flags & 33554432 /* AwaitContext */)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.await_expression_is_only_allowed_within_an_async_function);
+                }
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.await_expressions_cannot_be_used_in_a_parameter_initializer);
+                }
+            }
+            var operandType = checkExpression(node.expression);
+            return checkAwaitedType(operandType, node);
+        }
+        function checkPrefixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            switch (node.operator) {
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                case 50 /* TildeToken */:
+                    if (maybeTypeOfKind(operandType, 16777216 /* ESSymbol */)) {
+                        error(node.operand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(node.operator));
+                    }
+                    return numberType;
+                case 49 /* ExclamationToken */:
+                    return booleanType;
+                case 41 /* PlusPlusToken */:
+                case 42 /* MinusMinusToken */:
+                    var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+                    if (ok) {
+                        // run check only if former checks succeeded to avoid reporting cascading errors
+                        checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+                    }
+                    return numberType;
+            }
+            return unknownType;
+        }
+        function checkPostfixUnaryExpression(node) {
+            var operandType = checkExpression(node.operand);
+            var ok = checkArithmeticOperandType(node.operand, getNonNullableType(operandType), ts.Diagnostics.An_arithmetic_operand_must_be_of_type_any_number_or_an_enum_type);
+            if (ok) {
+                // run check only if former checks succeeded to avoid reporting cascading errors
+                checkReferenceExpression(node.operand, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_must_be_a_variable_property_or_indexer, ts.Diagnostics.The_operand_of_an_increment_or_decrement_operator_cannot_be_a_constant_or_a_read_only_property);
+            }
+            return numberType;
+        }
+        // Return true if type might be of the given kind. A union or intersection type might be of a given
+        // kind if at least one constituent type is of the given kind.
+        function maybeTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
+            }
+            if (type.flags & 49152 /* UnionOrIntersection */) {
+                var types = type.types;
+                for (var _i = 0, types_10 = types; _i < types_10.length; _i++) {
+                    var t = types_10[_i];
+                    if (maybeTypeOfKind(t, kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        // Return true if type is of the given kind. A union type is of a given kind if all constituent types
+        // are of the given kind. An intersection type is of a given kind if at least one constituent type is
+        // of the given kind.
+        function isTypeOfKind(type, kind) {
+            if (type.flags & kind) {
+                return true;
+            }
+            if (type.flags & 16384 /* Union */) {
+                var types = type.types;
+                for (var _i = 0, types_11 = types; _i < types_11.length; _i++) {
+                    var t = types_11[_i];
+                    if (!isTypeOfKind(t, kind)) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            if (type.flags & 32768 /* Intersection */) {
+                var types = type.types;
+                for (var _a = 0, types_12 = types; _a < types_12.length; _a++) {
+                    var t = types_12[_a];
+                    if (isTypeOfKind(t, kind)) {
+                        return true;
+                    }
+                }
+            }
+            return false;
+        }
+        function isConstEnumObjectType(type) {
+            return type.flags & (80896 /* ObjectType */ | 65536 /* Anonymous */) && type.symbol && isConstEnumSymbol(type.symbol);
+        }
+        function isConstEnumSymbol(symbol) {
+            return (symbol.flags & 128 /* ConstEnum */) !== 0;
+        }
+        function checkInstanceOfExpression(left, right, leftType, rightType) {
+            // TypeScript 1.0 spec (April 2014): 4.15.4
+            // The instanceof operator requires the left operand to be of type Any, an object type, or a type parameter type,
+            // and the right operand to be of type Any or a subtype of the 'Function' interface type.
+            // The result is always of the Boolean primitive type.
+            // NOTE: do not raise error if leftType is unknown as related error was already reported
+            if (isTypeOfKind(leftType, 16777726 /* Primitive */)) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_instanceof_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            // NOTE: do not raise error if right is unknown as related error was already reported
+            if (!(isTypeAny(rightType) || isTypeSubtypeOf(rightType, globalFunctionType))) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_instanceof_expression_must_be_of_type_any_or_of_a_type_assignable_to_the_Function_interface_type);
+            }
+            return booleanType;
+        }
+        function checkInExpression(left, right, leftType, rightType) {
+            // TypeScript 1.0 spec (April 2014): 4.15.5
+            // The in operator requires the left operand to be of type Any, the String primitive type, or the Number primitive type,
+            // and the right operand to be of type Any, an object type, or a type parameter type.
+            // The result is always of the Boolean primitive type.
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 /* StringLike */ | 132 /* NumberLike */ | 16777216 /* ESSymbol */)) {
+                error(left, ts.Diagnostics.The_left_hand_side_of_an_in_expression_must_be_of_type_any_string_number_or_symbol);
+            }
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 /* ObjectType */ | 512 /* TypeParameter */)) {
+                error(right, ts.Diagnostics.The_right_hand_side_of_an_in_expression_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            return booleanType;
+        }
+        function checkObjectLiteralAssignment(node, sourceType, contextualMapper) {
+            var properties = node.properties;
+            for (var _i = 0, properties_3 = properties; _i < properties_3.length; _i++) {
+                var p = properties_3[_i];
+                checkObjectLiteralDestructuringPropertyAssignment(sourceType, p, contextualMapper);
+            }
+            return sourceType;
+        }
+        function checkObjectLiteralDestructuringPropertyAssignment(objectLiteralType, property, contextualMapper) {
+            if (property.kind === 253 /* PropertyAssignment */ || property.kind === 254 /* ShorthandPropertyAssignment */) {
+                var name_14 = property.name;
+                if (name_14.kind === 140 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(name_14);
+                }
+                if (isComputedNonLiteralName(name_14)) {
+                    return undefined;
+                }
+                var text = getTextOfPropertyName(name_14);
+                var type = isTypeAny(objectLiteralType)
+                    ? objectLiteralType
+                    : getTypeOfPropertyOfType(objectLiteralType, text) ||
+                        isNumericLiteralName(text) && getIndexTypeOfType(objectLiteralType, 1 /* Number */) ||
+                        getIndexTypeOfType(objectLiteralType, 0 /* String */);
+                if (type) {
+                    if (property.kind === 254 /* ShorthandPropertyAssignment */) {
+                        return checkDestructuringAssignment(property, type);
+                    }
+                    else {
+                        // non-shorthand property assignments should always have initializers
+                        return checkDestructuringAssignment(property.initializer, type);
+                    }
+                }
+                else {
+                    error(name_14, ts.Diagnostics.Type_0_has_no_property_1_and_no_string_index_signature, typeToString(objectLiteralType), ts.declarationNameToString(name_14));
+                }
+            }
+            else {
+                error(property, ts.Diagnostics.Property_assignment_expected);
+            }
+        }
+        function checkArrayLiteralAssignment(node, sourceType, contextualMapper) {
+            // This elementType will be used if the specific property corresponding to this index is not
+            // present (aka the tuple element property). This call also checks that the parentType is in
+            // fact an iterable or array (depending on target language).
+            var elementType = checkIteratedTypeOrElementType(sourceType, node, /*allowStringInput*/ false) || unknownType;
+            var elements = node.elements;
+            for (var i = 0; i < elements.length; i++) {
+                checkArrayLiteralDestructuringElementAssignment(node, sourceType, i, elementType, contextualMapper);
+            }
+            return sourceType;
+        }
+        function checkArrayLiteralDestructuringElementAssignment(node, sourceType, elementIndex, elementType, contextualMapper) {
+            var elements = node.elements;
+            var element = elements[elementIndex];
+            if (element.kind !== 193 /* OmittedExpression */) {
+                if (element.kind !== 191 /* SpreadElementExpression */) {
+                    var propName = "" + elementIndex;
+                    var type = isTypeAny(sourceType)
+                        ? sourceType
+                        : isTupleLikeType(sourceType)
+                            ? getTypeOfPropertyOfType(sourceType, propName)
+                            : elementType;
+                    if (type) {
+                        return checkDestructuringAssignment(element, type, contextualMapper);
+                    }
+                    else {
+                        if (isTupleType(sourceType)) {
+                            error(element, ts.Diagnostics.Tuple_type_0_with_length_1_cannot_be_assigned_to_tuple_with_length_2, typeToString(sourceType), sourceType.elementTypes.length, elements.length);
+                        }
+                        else {
+                            error(element, ts.Diagnostics.Type_0_has_no_property_1, typeToString(sourceType), propName);
+                        }
+                    }
+                }
+                else {
+                    if (elementIndex < elements.length - 1) {
+                        error(element, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                    }
+                    else {
+                        var restExpression = element.expression;
+                        if (restExpression.kind === 187 /* BinaryExpression */ && restExpression.operatorToken.kind === 56 /* EqualsToken */) {
+                            error(restExpression.operatorToken, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                        }
+                        else {
+                            return checkDestructuringAssignment(restExpression, createArrayType(elementType), contextualMapper);
+                        }
+                    }
+                }
+            }
+            return undefined;
+        }
+        function checkDestructuringAssignment(exprOrAssignment, sourceType, contextualMapper) {
+            var target;
+            if (exprOrAssignment.kind === 254 /* ShorthandPropertyAssignment */) {
+                var prop = exprOrAssignment;
+                if (prop.objectAssignmentInitializer) {
+                    checkBinaryLikeExpression(prop.name, prop.equalsToken, prop.objectAssignmentInitializer, contextualMapper);
+                }
+                target = exprOrAssignment.name;
+            }
+            else {
+                target = exprOrAssignment;
+            }
+            if (target.kind === 187 /* BinaryExpression */ && target.operatorToken.kind === 56 /* EqualsToken */) {
+                checkBinaryExpression(target, contextualMapper);
+                target = target.left;
+            }
+            if (target.kind === 171 /* ObjectLiteralExpression */) {
+                return checkObjectLiteralAssignment(target, sourceType, contextualMapper);
+            }
+            if (target.kind === 170 /* ArrayLiteralExpression */) {
+                return checkArrayLiteralAssignment(target, sourceType, contextualMapper);
+            }
+            return checkReferenceAssignment(target, sourceType, contextualMapper);
+        }
+        function checkReferenceAssignment(target, sourceType, contextualMapper) {
+            var targetType = checkExpression(target, contextualMapper);
+            if (checkReferenceExpression(target, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property)) {
+                checkTypeAssignableTo(sourceType, targetType, target, /*headMessage*/ undefined);
+            }
+            return sourceType;
+        }
+        function isTypeEqualityComparableTo(source, target) {
+            return (target.flags & 96 /* Nullable */) !== 0 || isTypeComparableTo(source, target);
+        }
+        function checkBinaryExpression(node, contextualMapper) {
+            return checkBinaryLikeExpression(node.left, node.operatorToken, node.right, contextualMapper, node);
+        }
+        function checkBinaryLikeExpression(left, operatorToken, right, contextualMapper, errorNode) {
+            var operator = operatorToken.kind;
+            if (operator === 56 /* EqualsToken */ && (left.kind === 171 /* ObjectLiteralExpression */ || left.kind === 170 /* ArrayLiteralExpression */)) {
+                return checkDestructuringAssignment(left, checkExpression(right, contextualMapper), contextualMapper);
+            }
+            var leftType = checkExpression(left, contextualMapper);
+            var rightType = checkExpression(right, contextualMapper);
+            switch (operator) {
+                case 37 /* AsteriskToken */:
+                case 38 /* AsteriskAsteriskToken */:
+                case 59 /* AsteriskEqualsToken */:
+                case 60 /* AsteriskAsteriskEqualsToken */:
+                case 39 /* SlashToken */:
+                case 61 /* SlashEqualsToken */:
+                case 40 /* PercentToken */:
+                case 62 /* PercentEqualsToken */:
+                case 36 /* MinusToken */:
+                case 58 /* MinusEqualsToken */:
+                case 43 /* LessThanLessThanToken */:
+                case 63 /* LessThanLessThanEqualsToken */:
+                case 44 /* GreaterThanGreaterThanToken */:
+                case 64 /* GreaterThanGreaterThanEqualsToken */:
+                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
+                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                case 47 /* BarToken */:
+                case 67 /* BarEqualsToken */:
+                case 48 /* CaretToken */:
+                case 68 /* CaretEqualsToken */:
+                case 46 /* AmpersandToken */:
+                case 66 /* AmpersandEqualsToken */:
+                    // TypeScript 1.0 spec (April 2014): 4.19.1
+                    // These operators require their operands to be of type Any, the Number primitive type,
+                    // or an enum type. Operands of an enum type are treated
+                    // as having the primitive type Number. If one operand is the null or undefined value,
+                    // it is treated as having the type of the other operand.
+                    // The result is always of the Number primitive type.
+                    if (leftType.flags & 96 /* Nullable */)
+                        leftType = rightType;
+                    if (rightType.flags & 96 /* Nullable */)
+                        rightType = leftType;
+                    leftType = getNonNullableType(leftType);
+                    rightType = getNonNullableType(rightType);
+                    var suggestedOperator = void 0;
+                    // if a user tries to apply a bitwise operator to 2 boolean operands
+                    // try and return them a helpful suggestion
+                    if ((leftType.flags & 8 /* Boolean */) &&
+                        (rightType.flags & 8 /* Boolean */) &&
+                        (suggestedOperator = getSuggestedBooleanOperator(operatorToken.kind)) !== undefined) {
+                        error(errorNode || operatorToken, ts.Diagnostics.The_0_operator_is_not_allowed_for_boolean_types_Consider_using_1_instead, ts.tokenToString(operatorToken.kind), ts.tokenToString(suggestedOperator));
+                    }
+                    else {
+                        // otherwise just check each operand separately and report errors as normal
+                        var leftOk = checkArithmeticOperandType(left, leftType, ts.Diagnostics.The_left_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        var rightOk = checkArithmeticOperandType(right, rightType, ts.Diagnostics.The_right_hand_side_of_an_arithmetic_operation_must_be_of_type_any_number_or_an_enum_type);
+                        if (leftOk && rightOk) {
+                            checkAssignmentOperator(numberType);
+                        }
+                    }
+                    return numberType;
+                case 35 /* PlusToken */:
+                case 57 /* PlusEqualsToken */:
+                    // TypeScript 1.0 spec (April 2014): 4.19.2
+                    // The binary + operator requires both operands to be of the Number primitive type or an enum type,
+                    // or at least one of the operands to be of type Any or the String primitive type.
+                    // If one operand is the null or undefined value, it is treated as having the type of the other operand.
+                    if (leftType.flags & 96 /* Nullable */)
+                        leftType = rightType;
+                    if (rightType.flags & 96 /* Nullable */)
+                        rightType = leftType;
+                    leftType = getNonNullableType(leftType);
+                    rightType = getNonNullableType(rightType);
+                    var resultType = void 0;
+                    if (isTypeOfKind(leftType, 132 /* NumberLike */) && isTypeOfKind(rightType, 132 /* NumberLike */)) {
+                        // Operands of an enum type are treated as having the primitive type Number.
+                        // If both operands are of the Number primitive type, the result is of the Number primitive type.
+                        resultType = numberType;
+                    }
+                    else {
+                        if (isTypeOfKind(leftType, 258 /* StringLike */) || isTypeOfKind(rightType, 258 /* StringLike */)) {
+                            // If one or both operands are of the String primitive type, the result is of the String primitive type.
+                            resultType = stringType;
+                        }
+                        else if (isTypeAny(leftType) || isTypeAny(rightType)) {
+                            // Otherwise, the result is of type Any.
+                            // NOTE: unknown type here denotes error type. Old compiler treated this case as any type so do we.
+                            resultType = leftType === unknownType || rightType === unknownType ? unknownType : anyType;
+                        }
+                        // Symbols are not allowed at all in arithmetic expressions
+                        if (resultType && !checkForDisallowedESSymbolOperand(operator)) {
+                            return resultType;
+                        }
+                    }
+                    if (!resultType) {
+                        reportOperatorError();
+                        return anyType;
+                    }
+                    if (operator === 57 /* PlusEqualsToken */) {
+                        checkAssignmentOperator(resultType);
+                    }
+                    return resultType;
+                case 25 /* LessThanToken */:
+                case 27 /* GreaterThanToken */:
+                case 28 /* LessThanEqualsToken */:
+                case 29 /* GreaterThanEqualsToken */:
+                    if (checkForDisallowedESSymbolOperand(operator)) {
+                        if (!isTypeComparableTo(leftType, rightType) && !isTypeComparableTo(rightType, leftType)) {
+                            reportOperatorError();
+                        }
+                    }
+                    return booleanType;
+                case 30 /* EqualsEqualsToken */:
+                case 31 /* ExclamationEqualsToken */:
+                case 32 /* EqualsEqualsEqualsToken */:
+                case 33 /* ExclamationEqualsEqualsToken */:
+                    if (!isTypeEqualityComparableTo(leftType, rightType) && !isTypeEqualityComparableTo(rightType, leftType)) {
+                        reportOperatorError();
+                    }
+                    return booleanType;
+                case 91 /* InstanceOfKeyword */:
+                    return checkInstanceOfExpression(left, right, leftType, rightType);
+                case 90 /* InKeyword */:
+                    return checkInExpression(left, right, leftType, rightType);
+                case 51 /* AmpersandAmpersandToken */:
+                    return strictNullChecks ? addTypeKind(rightType, getCombinedTypeFlags(leftType) & 126 /* Falsy */) : rightType;
+                case 52 /* BarBarToken */:
+                    return getUnionType([getNonNullableType(leftType), rightType]);
+                case 56 /* EqualsToken */:
+                    checkAssignmentOperator(rightType);
+                    return getRegularTypeOfObjectLiteral(rightType);
+                case 24 /* CommaToken */:
+                    return rightType;
+            }
+            // Return true if there was no error, false if there was an error.
+            function checkForDisallowedESSymbolOperand(operator) {
+                var offendingSymbolOperand = maybeTypeOfKind(leftType, 16777216 /* ESSymbol */) ? left :
+                    maybeTypeOfKind(rightType, 16777216 /* ESSymbol */) ? right :
+                        undefined;
+                if (offendingSymbolOperand) {
+                    error(offendingSymbolOperand, ts.Diagnostics.The_0_operator_cannot_be_applied_to_type_symbol, ts.tokenToString(operator));
+                    return false;
+                }
+                return true;
+            }
+            function getSuggestedBooleanOperator(operator) {
+                switch (operator) {
+                    case 47 /* BarToken */:
+                    case 67 /* BarEqualsToken */:
+                        return 52 /* BarBarToken */;
+                    case 48 /* CaretToken */:
+                    case 68 /* CaretEqualsToken */:
+                        return 33 /* ExclamationEqualsEqualsToken */;
+                    case 46 /* AmpersandToken */:
+                    case 66 /* AmpersandEqualsToken */:
+                        return 51 /* AmpersandAmpersandToken */;
+                    default:
+                        return undefined;
+                }
+            }
+            function checkAssignmentOperator(valueType) {
+                if (produceDiagnostics && operator >= 56 /* FirstAssignment */ && operator <= 68 /* LastAssignment */) {
+                    // TypeScript 1.0 spec (April 2014): 4.17
+                    // An assignment of the form
+                    //    VarExpr = ValueExpr
+                    // requires VarExpr to be classified as a reference
+                    // A compound assignment furthermore requires VarExpr to be classified as a reference (section 4.1)
+                    // and the type of the non - compound operation to be assignable to the type of VarExpr.
+                    var ok = checkReferenceExpression(left, ts.Diagnostics.Invalid_left_hand_side_of_assignment_expression, ts.Diagnostics.Left_hand_side_of_assignment_expression_cannot_be_a_constant_or_a_read_only_property);
+                    // Use default messages
+                    if (ok) {
+                        // to avoid cascading errors check assignability only if 'isReference' check succeeded and no errors were reported
+                        checkTypeAssignableTo(valueType, leftType, left, /*headMessage*/ undefined);
+                    }
+                }
+            }
+            function reportOperatorError() {
+                error(errorNode || operatorToken, ts.Diagnostics.Operator_0_cannot_be_applied_to_types_1_and_2, ts.tokenToString(operatorToken.kind), typeToString(leftType), typeToString(rightType));
+            }
+        }
+        function isYieldExpressionInClass(node) {
+            var current = node;
+            var parent = node.parent;
+            while (parent) {
+                if (ts.isFunctionLike(parent) && current === parent.body) {
+                    return false;
+                }
+                else if (ts.isClassLike(current)) {
+                    return true;
+                }
+                current = parent;
+                parent = parent.parent;
+            }
+            return false;
+        }
+        function checkYieldExpression(node) {
+            // Grammar checking
+            if (produceDiagnostics) {
+                if (!(node.flags & 8388608 /* YieldContext */) || isYieldExpressionInClass(node)) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_yield_expression_is_only_allowed_in_a_generator_body);
+                }
+                if (isInParameterInitializerBeforeContainingFunction(node)) {
+                    error(node, ts.Diagnostics.yield_expressions_cannot_be_used_in_a_parameter_initializer);
+                }
+            }
+            if (node.expression) {
+                var func = ts.getContainingFunction(node);
+                // If the user's code is syntactically correct, the func should always have a star. After all,
+                // we are in a yield context.
+                if (func && func.asteriskToken) {
+                    var expressionType = checkExpressionCached(node.expression, /*contextualMapper*/ undefined);
+                    var expressionElementType = void 0;
+                    var nodeIsYieldStar = !!node.asteriskToken;
+                    if (nodeIsYieldStar) {
+                        expressionElementType = checkElementTypeOfIterable(expressionType, node.expression);
+                    }
+                    // There is no point in doing an assignability check if the function
+                    // has no explicit return type because the return type is directly computed
+                    // from the yield expressions.
+                    if (func.type) {
+                        var signatureElementType = getElementTypeOfIterableIterator(getTypeFromTypeNode(func.type)) || anyType;
+                        if (nodeIsYieldStar) {
+                            checkTypeAssignableTo(expressionElementType, signatureElementType, node.expression, /*headMessage*/ undefined);
+                        }
+                        else {
+                            checkTypeAssignableTo(expressionType, signatureElementType, node.expression, /*headMessage*/ undefined);
+                        }
+                    }
+                }
+            }
+            // Both yield and yield* expressions have type 'any'
+            return anyType;
+        }
+        function checkConditionalExpression(node, contextualMapper) {
+            checkExpression(node.condition);
+            var type1 = checkExpression(node.whenTrue, contextualMapper);
+            var type2 = checkExpression(node.whenFalse, contextualMapper);
+            return getUnionType([type1, type2]);
+        }
+        function checkStringLiteralExpression(node) {
+            var contextualType = getContextualType(node);
+            if (contextualType && contextualTypeIsStringLiteralType(contextualType)) {
+                return getStringLiteralTypeForText(node.text);
+            }
+            return stringType;
+        }
+        function checkTemplateExpression(node) {
+            // We just want to check each expressions, but we are unconcerned with
+            // the type of each expression, as any value may be coerced into a string.
+            // It is worth asking whether this is what we really want though.
+            // A place where we actually *are* concerned with the expressions' types are
+            // in tagged templates.
+            ts.forEach(node.templateSpans, function (templateSpan) {
+                checkExpression(templateSpan.expression);
+            });
+            return stringType;
+        }
+        function checkExpressionWithContextualType(node, contextualType, contextualMapper) {
+            var saveContextualType = node.contextualType;
+            node.contextualType = contextualType;
+            var result = checkExpression(node, contextualMapper);
+            node.contextualType = saveContextualType;
+            return result;
+        }
+        function checkExpressionCached(node, contextualMapper) {
+            var links = getNodeLinks(node);
+            if (!links.resolvedType) {
+                // When computing a type that we're going to cache, we need to ignore any ongoing control flow
+                // analysis because variables may have transient types in indeterminable states. Moving flowLoopStart
+                // to the top of the stack ensures all transient types are computed from a known point.
+                var saveFlowLoopStart = flowLoopStart;
+                flowLoopStart = flowLoopCount;
+                links.resolvedType = checkExpression(node, contextualMapper);
+                flowLoopStart = saveFlowLoopStart;
+            }
+            return links.resolvedType;
+        }
+        function checkPropertyAssignment(node, contextualMapper) {
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 140 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
+            }
+            return checkExpression(node.initializer, contextualMapper);
+        }
+        function checkObjectLiteralMethod(node, contextualMapper) {
+            // Grammar checking
+            checkGrammarMethod(node);
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 140 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
+            }
+            var uninstantiatedType = checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
+            return instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
+        }
+        function instantiateTypeWithSingleGenericCallSignature(node, type, contextualMapper) {
+            if (isInferentialContext(contextualMapper)) {
+                var signature = getSingleCallSignature(type);
+                if (signature && signature.typeParameters) {
+                    var contextualType = getApparentTypeOfContextualType(node);
+                    if (contextualType) {
+                        var contextualSignature = getSingleCallSignature(contextualType);
+                        if (contextualSignature && !contextualSignature.typeParameters) {
+                            return getOrCreateTypeFromSignature(instantiateSignatureInContextOf(signature, contextualSignature, contextualMapper));
+                        }
+                    }
+                }
+            }
+            return type;
+        }
+        // Checks an expression and returns its type. The contextualMapper parameter serves two purposes: When
+        // contextualMapper is not undefined and not equal to the identityMapper function object it indicates that the
+        // expression is being inferentially typed (section 4.15.2 in spec) and provides the type mapper to use in
+        // conjunction with the generic contextual type. When contextualMapper is equal to the identityMapper function
+        // object, it serves as an indicator that all contained function and arrow expressions should be considered to
+        // have the wildcard function type; this form of type check is used during overload resolution to exclude
+        // contextually typed function and arrow expressions in the initial phase.
+        function checkExpression(node, contextualMapper) {
+            var type;
+            if (node.kind === 139 /* QualifiedName */) {
+                type = checkQualifiedName(node);
+            }
+            else {
+                var uninstantiatedType = checkExpressionWorker(node, contextualMapper);
+                type = instantiateTypeWithSingleGenericCallSignature(node, uninstantiatedType, contextualMapper);
+            }
+            if (isConstEnumObjectType(type)) {
+                // enum object type for const enums are only permitted in:
+                // - 'left' in property access
+                // - 'object' in indexed access
+                // - target in rhs of import statement
+                var ok = (node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.expression === node) ||
+                    (node.parent.kind === 173 /* ElementAccessExpression */ && node.parent.expression === node) ||
+                    ((node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */) && isInRightSideOfImportOrExportAssignment(node));
+                if (!ok) {
+                    error(node, ts.Diagnostics.const_enums_can_only_be_used_in_property_or_index_access_expressions_or_the_right_hand_side_of_an_import_declaration_or_export_assignment);
+                }
+            }
+            return type;
+        }
+        function checkNumericLiteral(node) {
+            // Grammar checking
+            checkGrammarNumericLiteral(node);
+            return numberType;
+        }
+        function checkExpressionWorker(node, contextualMapper) {
+            switch (node.kind) {
+                case 69 /* Identifier */:
+                    return checkIdentifier(node);
+                case 97 /* ThisKeyword */:
+                    return checkThisExpression(node);
+                case 95 /* SuperKeyword */:
+                    return checkSuperExpression(node);
+                case 93 /* NullKeyword */:
+                    return nullWideningType;
+                case 99 /* TrueKeyword */:
+                case 84 /* FalseKeyword */:
+                    return booleanType;
+                case 8 /* NumericLiteral */:
+                    return checkNumericLiteral(node);
+                case 189 /* TemplateExpression */:
+                    return checkTemplateExpression(node);
+                case 9 /* StringLiteral */:
+                    return checkStringLiteralExpression(node);
+                case 11 /* NoSubstitutionTemplateLiteral */:
+                    return stringType;
+                case 10 /* RegularExpressionLiteral */:
+                    return globalRegExpType;
+                case 170 /* ArrayLiteralExpression */:
+                    return checkArrayLiteral(node, contextualMapper);
+                case 171 /* ObjectLiteralExpression */:
+                    return checkObjectLiteral(node, contextualMapper);
+                case 172 /* PropertyAccessExpression */:
+                    return checkPropertyAccessExpression(node);
+                case 173 /* ElementAccessExpression */:
+                    return checkIndexedAccess(node);
+                case 174 /* CallExpression */:
+                case 175 /* NewExpression */:
+                    return checkCallExpression(node);
+                case 176 /* TaggedTemplateExpression */:
+                    return checkTaggedTemplateExpression(node);
+                case 178 /* ParenthesizedExpression */:
+                    return checkExpression(node.expression, contextualMapper);
+                case 192 /* ClassExpression */:
+                    return checkClassExpression(node);
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    return checkFunctionExpressionOrObjectLiteralMethod(node, contextualMapper);
+                case 182 /* TypeOfExpression */:
+                    return checkTypeOfExpression(node);
+                case 177 /* TypeAssertionExpression */:
+                case 195 /* AsExpression */:
+                    return checkAssertion(node);
+                case 196 /* NonNullExpression */:
+                    return checkNonNullAssertion(node);
+                case 181 /* DeleteExpression */:
+                    return checkDeleteExpression(node);
+                case 183 /* VoidExpression */:
+                    return checkVoidExpression(node);
+                case 184 /* AwaitExpression */:
+                    return checkAwaitExpression(node);
+                case 185 /* PrefixUnaryExpression */:
+                    return checkPrefixUnaryExpression(node);
+                case 186 /* PostfixUnaryExpression */:
+                    return checkPostfixUnaryExpression(node);
+                case 187 /* BinaryExpression */:
+                    return checkBinaryExpression(node, contextualMapper);
+                case 188 /* ConditionalExpression */:
+                    return checkConditionalExpression(node, contextualMapper);
+                case 191 /* SpreadElementExpression */:
+                    return checkSpreadElementExpression(node, contextualMapper);
+                case 193 /* OmittedExpression */:
+                    return undefinedWideningType;
+                case 190 /* YieldExpression */:
+                    return checkYieldExpression(node);
+                case 248 /* JsxExpression */:
+                    return checkJsxExpression(node);
+                case 241 /* JsxElement */:
+                    return checkJsxElement(node);
+                case 242 /* JsxSelfClosingElement */:
+                    return checkJsxSelfClosingElement(node);
+                case 243 /* JsxOpeningElement */:
+                    ts.Debug.fail("Shouldn't ever directly check a JsxOpeningElement");
+            }
+            return unknownType;
+        }
+        // DECLARATION AND STATEMENT TYPE CHECKING
+        function checkTypeParameter(node) {
+            // Grammar Checking
+            if (node.expression) {
+                grammarErrorOnFirstToken(node.expression, ts.Diagnostics.Type_expected);
+            }
+            checkSourceElement(node.constraint);
+            getConstraintOfTypeParameter(getDeclaredTypeOfTypeParameter(getSymbolOfNode(node)));
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_parameter_name_cannot_be_0);
+            }
+        }
+        function checkParameter(node) {
+            // Grammar checking
+            // It is a SyntaxError if the Identifier "eval" or the Identifier "arguments" occurs as the
+            // Identifier in a PropertySetParameterList of a PropertyAssignment that is contained in strict code
+            // or if its FunctionBody is strict code(11.1.5).
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkVariableLikeDeclaration(node);
+            var func = ts.getContainingFunction(node);
+            if (node.flags & 92 /* ParameterPropertyModifier */) {
+                func = ts.getContainingFunction(node);
+                if (!(func.kind === 148 /* Constructor */ && ts.nodeIsPresent(func.body))) {
+                    error(node, ts.Diagnostics.A_parameter_property_is_only_allowed_in_a_constructor_implementation);
+                }
+            }
+            if (node.questionToken && ts.isBindingPattern(node.name) && func.body) {
+                error(node, ts.Diagnostics.A_binding_pattern_parameter_cannot_be_optional_in_an_implementation_signature);
+            }
+            if (node.name.text === "this") {
+                if (ts.indexOf(func.parameters, node) !== 0) {
+                    error(node, ts.Diagnostics.A_this_parameter_must_be_the_first_parameter);
+                }
+                if (func.kind === 148 /* Constructor */ || func.kind === 152 /* ConstructSignature */ || func.kind === 157 /* ConstructorType */) {
+                    error(node, ts.Diagnostics.A_constructor_cannot_have_a_this_parameter);
+                }
+            }
+            // Only check rest parameter type if it's not a binding pattern. Since binding patterns are
+            // not allowed in a rest parameter, we already have an error from checkGrammarParameterList.
+            if (node.dotDotDotToken && !ts.isBindingPattern(node.name) && !isArrayType(getTypeOfSymbol(node.symbol))) {
+                error(node, ts.Diagnostics.A_rest_parameter_must_be_of_an_array_type);
+            }
+        }
+        function isSyntacticallyValidGenerator(node) {
+            if (!node.asteriskToken || !node.body) {
+                return false;
+            }
+            return node.kind === 147 /* MethodDeclaration */ ||
+                node.kind === 220 /* FunctionDeclaration */ ||
+                node.kind === 179 /* FunctionExpression */;
+        }
+        function getTypePredicateParameterIndex(parameterList, parameter) {
+            if (parameterList) {
+                for (var i = 0; i < parameterList.length; i++) {
+                    var param = parameterList[i];
+                    if (param.name.kind === 69 /* Identifier */ &&
+                        param.name.text === parameter.text) {
+                        return i;
+                    }
+                }
+            }
+            return -1;
+        }
+        function checkTypePredicate(node) {
+            var parent = getTypePredicateParent(node);
+            if (!parent) {
+                // The parent must not be valid.
+                error(node, ts.Diagnostics.A_type_predicate_is_only_allowed_in_return_type_position_for_functions_and_methods);
+                return;
+            }
+            var typePredicate = getSignatureFromDeclaration(parent).typePredicate;
+            if (!typePredicate) {
+                return;
+            }
+            var parameterName = node.parameterName;
+            if (ts.isThisTypePredicate(typePredicate)) {
+                getTypeFromThisTypeNode(parameterName);
+            }
+            else {
+                if (typePredicate.parameterIndex >= 0) {
+                    if (parent.parameters[typePredicate.parameterIndex].dotDotDotToken) {
+                        error(parameterName, ts.Diagnostics.A_type_predicate_cannot_reference_a_rest_parameter);
+                    }
+                    else {
+                        var leadingError = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.A_type_predicate_s_type_must_be_assignable_to_its_parameter_s_type);
+                        checkTypeAssignableTo(typePredicate.type, getTypeOfNode(parent.parameters[typePredicate.parameterIndex]), node.type, 
+                        /*headMessage*/ undefined, leadingError);
+                    }
+                }
+                else if (parameterName) {
+                    var hasReportedError = false;
+                    for (var _i = 0, _a = parent.parameters; _i < _a.length; _i++) {
+                        var name_15 = _a[_i].name;
+                        if (ts.isBindingPattern(name_15) &&
+                            checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_15, parameterName, typePredicate.parameterName)) {
+                            hasReportedError = true;
+                            break;
+                        }
+                    }
+                    if (!hasReportedError) {
+                        error(node.parameterName, ts.Diagnostics.Cannot_find_parameter_0, typePredicate.parameterName);
+                    }
+                }
+            }
+        }
+        function getTypePredicateParent(node) {
+            switch (node.parent.kind) {
+                case 180 /* ArrowFunction */:
+                case 151 /* CallSignature */:
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 156 /* FunctionType */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                    var parent_10 = node.parent;
+                    if (node === parent_10.type) {
+                        return parent_10;
+                    }
+            }
+        }
+        function checkIfTypePredicateVariableIsDeclaredInBindingPattern(pattern, predicateVariableNode, predicateVariableName) {
+            for (var _i = 0, _a = pattern.elements; _i < _a.length; _i++) {
+                var name_16 = _a[_i].name;
+                if (name_16.kind === 69 /* Identifier */ &&
+                    name_16.text === predicateVariableName) {
+                    error(predicateVariableNode, ts.Diagnostics.A_type_predicate_cannot_reference_element_0_in_a_binding_pattern, predicateVariableName);
+                    return true;
+                }
+                else if (name_16.kind === 168 /* ArrayBindingPattern */ ||
+                    name_16.kind === 167 /* ObjectBindingPattern */) {
+                    if (checkIfTypePredicateVariableIsDeclaredInBindingPattern(name_16, predicateVariableNode, predicateVariableName)) {
+                        return true;
+                    }
+                }
+            }
+        }
+        function checkSignatureDeclaration(node) {
+            // Grammar checking
+            if (node.kind === 153 /* IndexSignature */) {
+                checkGrammarIndexSignature(node);
+            }
+            else if (node.kind === 156 /* FunctionType */ || node.kind === 220 /* FunctionDeclaration */ || node.kind === 157 /* ConstructorType */ ||
+                node.kind === 151 /* CallSignature */ || node.kind === 148 /* Constructor */ ||
+                node.kind === 152 /* ConstructSignature */) {
+                checkGrammarFunctionLikeDeclaration(node);
+            }
+            checkTypeParameters(node.typeParameters);
+            ts.forEach(node.parameters, checkParameter);
+            if (node.type) {
+                checkSourceElement(node.type);
+            }
+            if (produceDiagnostics) {
+                checkCollisionWithArgumentsInGeneratedCode(node);
+                if (compilerOptions.noImplicitAny && !node.type) {
+                    switch (node.kind) {
+                        case 152 /* ConstructSignature */:
+                            error(node, ts.Diagnostics.Construct_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                        case 151 /* CallSignature */:
+                            error(node, ts.Diagnostics.Call_signature_which_lacks_return_type_annotation_implicitly_has_an_any_return_type);
+                            break;
+                    }
+                }
+                if (node.type) {
+                    if (languageVersion >= 2 /* ES6 */ && isSyntacticallyValidGenerator(node)) {
+                        var returnType = getTypeFromTypeNode(node.type);
+                        if (returnType === voidType) {
+                            error(node.type, ts.Diagnostics.A_generator_cannot_have_a_void_type_annotation);
+                        }
+                        else {
+                            var generatorElementType = getElementTypeOfIterableIterator(returnType) || anyType;
+                            var iterableIteratorInstantiation = createIterableIteratorType(generatorElementType);
+                            // Naively, one could check that IterableIterator<any> is assignable to the return type annotation.
+                            // However, that would not catch the error in the following case.
+                            //
+                            //    interface BadGenerator extends Iterable<number>, Iterator<string> { }
+                            //    function* g(): BadGenerator { } // Iterable and Iterator have different types!
+                            //
+                            checkTypeAssignableTo(iterableIteratorInstantiation, returnType, node.type);
+                        }
+                    }
+                    else if (ts.isAsyncFunctionLike(node)) {
+                        checkAsyncFunctionReturnType(node);
+                    }
+                }
+            }
+        }
+        function checkClassForDuplicateDeclarations(node) {
+            var getter = 1, setter = 2, property = getter | setter;
+            var instanceNames = {};
+            var staticNames = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind === 148 /* Constructor */) {
+                    for (var _b = 0, _c = member.parameters; _b < _c.length; _b++) {
+                        var param = _c[_b];
+                        if (ts.isParameterPropertyDeclaration(param)) {
+                            addName(instanceNames, param.name, param.name.text, property);
+                        }
+                    }
+                }
+                else {
+                    var static = ts.forEach(member.modifiers, function (m) { return m.kind === 113 /* StaticKeyword */; });
+                    var names = static ? staticNames : instanceNames;
+                    var memberName = member.name && ts.getPropertyNameForPropertyNameNode(member.name);
+                    if (memberName) {
+                        switch (member.kind) {
+                            case 149 /* GetAccessor */:
+                                addName(names, member.name, memberName, getter);
+                                break;
+                            case 150 /* SetAccessor */:
+                                addName(names, member.name, memberName, setter);
+                                break;
+                            case 145 /* PropertyDeclaration */:
+                                addName(names, member.name, memberName, property);
+                                break;
+                        }
+                    }
+                }
+            }
+            function addName(names, location, name, meaning) {
+                if (ts.hasProperty(names, name)) {
+                    var prev = names[name];
+                    if (prev & meaning) {
+                        error(location, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(location));
+                    }
+                    else {
+                        names[name] = prev | meaning;
+                    }
+                }
+                else {
+                    names[name] = meaning;
+                }
+            }
+        }
+        function checkObjectTypeForDuplicateDeclarations(node) {
+            var names = {};
+            for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                var member = _a[_i];
+                if (member.kind == 144 /* PropertySignature */) {
+                    var memberName = void 0;
+                    switch (member.name.kind) {
+                        case 9 /* StringLiteral */:
+                        case 8 /* NumericLiteral */:
+                        case 69 /* Identifier */:
+                            memberName = member.name.text;
+                            break;
+                        default:
+                            continue;
+                    }
+                    if (ts.hasProperty(names, memberName)) {
+                        error(member.symbol.valueDeclaration.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                        error(member.name, ts.Diagnostics.Duplicate_identifier_0, memberName);
+                    }
+                    else {
+                        names[memberName] = true;
+                    }
+                }
+            }
+        }
+        function checkTypeForDuplicateIndexSignatures(node) {
+            if (node.kind === 222 /* InterfaceDeclaration */) {
+                var nodeSymbol = getSymbolOfNode(node);
+                // in case of merging interface declaration it is possible that we'll enter this check procedure several times for every declaration
+                // to prevent this run check only for the first declaration of a given kind
+                if (nodeSymbol.declarations.length > 0 && nodeSymbol.declarations[0] !== node) {
+                    return;
+                }
+            }
+            // TypeScript 1.0 spec (April 2014)
+            // 3.7.4: An object type can contain at most one string index signature and one numeric index signature.
+            // 8.5: A class declaration can have at most one string index member declaration and one numeric index member declaration
+            var indexSymbol = getIndexSymbol(getSymbolOfNode(node));
+            if (indexSymbol) {
+                var seenNumericIndexer = false;
+                var seenStringIndexer = false;
+                for (var _i = 0, _a = indexSymbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var declaration = decl;
+                    if (declaration.parameters.length === 1 && declaration.parameters[0].type) {
+                        switch (declaration.parameters[0].type.kind) {
+                            case 132 /* StringKeyword */:
+                                if (!seenStringIndexer) {
+                                    seenStringIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_string_index_signature);
+                                }
+                                break;
+                            case 130 /* NumberKeyword */:
+                                if (!seenNumericIndexer) {
+                                    seenNumericIndexer = true;
+                                }
+                                else {
+                                    error(declaration, ts.Diagnostics.Duplicate_number_index_signature);
+                                }
+                                break;
+                        }
+                    }
+                }
+            }
+        }
+        function checkPropertyDeclaration(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarProperty(node) || checkGrammarComputedPropertyName(node.name);
+            checkVariableLikeDeclaration(node);
+        }
+        function checkMethodDeclaration(node) {
+            // Grammar checking
+            checkGrammarMethod(node) || checkGrammarComputedPropertyName(node.name);
+            // Grammar checking for modifiers is done inside the function checkGrammarFunctionLikeDeclaration
+            checkFunctionOrMethodDeclaration(node);
+            // Abstract methods cannot have an implementation.
+            // Extra checks are to avoid reporting multiple errors relating to the "abstractness" of the node.
+            if (node.flags & 128 /* Abstract */ && node.body) {
+                error(node, ts.Diagnostics.Method_0_cannot_have_an_implementation_because_it_is_marked_abstract, ts.declarationNameToString(node.name));
+            }
+        }
+        function checkConstructorDeclaration(node) {
+            // Grammar check on signature of constructor and modifier of the constructor is done in checkSignatureDeclaration function.
+            checkSignatureDeclaration(node);
+            // Grammar check for checking only related to constructorDeclaration
+            checkGrammarConstructorTypeParameters(node) || checkGrammarConstructorTypeAnnotation(node);
+            checkSourceElement(node.body);
+            var symbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(symbol, node.kind);
+            // Only type check the symbol once
+            if (node === firstDeclaration) {
+                checkFunctionOrConstructorSymbol(symbol);
+            }
+            // exit early in the case of signature - super checks are not relevant to them
+            if (ts.nodeIsMissing(node.body)) {
+                return;
+            }
+            if (!produceDiagnostics) {
+                return;
+            }
+            function containsSuperCallAsComputedPropertyName(n) {
+                return n.name && containsSuperCall(n.name);
+            }
+            function containsSuperCall(n) {
+                if (ts.isSuperCallExpression(n)) {
+                    return true;
+                }
+                else if (ts.isFunctionLike(n)) {
+                    return false;
+                }
+                else if (ts.isClassLike(n)) {
+                    return ts.forEach(n.members, containsSuperCallAsComputedPropertyName);
+                }
+                return ts.forEachChild(n, containsSuperCall);
+            }
+            function markThisReferencesAsErrors(n) {
+                if (n.kind === 97 /* ThisKeyword */) {
+                    error(n, ts.Diagnostics.this_cannot_be_referenced_in_current_location);
+                }
+                else if (n.kind !== 179 /* FunctionExpression */ && n.kind !== 220 /* FunctionDeclaration */) {
+                    ts.forEachChild(n, markThisReferencesAsErrors);
+                }
+            }
+            function isInstancePropertyWithInitializer(n) {
+                return n.kind === 145 /* PropertyDeclaration */ &&
+                    !(n.flags & 32 /* Static */) &&
+                    !!n.initializer;
+            }
+            // TS 1.0 spec (April 2014): 8.3.2
+            // Constructors of classes with no extends clause may not contain super calls, whereas
+            // constructors of derived classes must contain at least one super call somewhere in their function body.
+            var containingClassDecl = node.parent;
+            if (ts.getClassExtendsHeritageClauseElement(containingClassDecl)) {
+                var classExtendsNull = classDeclarationExtendsNull(containingClassDecl);
+                var superCall = getSuperCallInConstructor(node);
+                if (superCall) {
+                    if (classExtendsNull) {
+                        error(superCall, ts.Diagnostics.A_constructor_cannot_contain_a_super_call_when_its_class_extends_null);
+                    }
+                    // The first statement in the body of a constructor (excluding prologue directives) must be a super call
+                    // if both of the following are true:
+                    // - The containing class is a derived class.
+                    // - The constructor declares parameter properties
+                    //   or the containing class declares instance member variables with initializers.
+                    var superCallShouldBeFirst = ts.forEach(node.parent.members, isInstancePropertyWithInitializer) ||
+                        ts.forEach(node.parameters, function (p) { return p.flags & 92 /* ParameterPropertyModifier */; });
+                    // Skip past any prologue directives to find the first statement
+                    // to ensure that it was a super call.
+                    if (superCallShouldBeFirst) {
+                        var statements = node.body.statements;
+                        var superCallStatement = void 0;
+                        for (var _i = 0, statements_2 = statements; _i < statements_2.length; _i++) {
+                            var statement = statements_2[_i];
+                            if (statement.kind === 202 /* ExpressionStatement */ && ts.isSuperCallExpression(statement.expression)) {
+                                superCallStatement = statement;
+                                break;
+                            }
+                            if (!ts.isPrologueDirective(statement)) {
+                                break;
+                            }
+                        }
+                        if (!superCallStatement) {
+                            error(node, ts.Diagnostics.A_super_call_must_be_the_first_statement_in_the_constructor_when_a_class_contains_initialized_properties_or_has_parameter_properties);
+                        }
+                    }
+                }
+                else if (!classExtendsNull) {
+                    error(node, ts.Diagnostics.Constructors_for_derived_classes_must_contain_a_super_call);
+                }
+            }
+        }
+        function checkAccessorDeclaration(node) {
+            if (produceDiagnostics) {
+                // Grammar checking accessors
+                checkGrammarFunctionLikeDeclaration(node) || checkGrammarAccessor(node) || checkGrammarComputedPropertyName(node.name);
+                checkDecorators(node);
+                checkSignatureDeclaration(node);
+                if (node.kind === 149 /* GetAccessor */) {
+                    if (!ts.isInAmbientContext(node) && ts.nodeIsPresent(node.body) && (node.flags & 32768 /* HasImplicitReturn */)) {
+                        if (node.flags & 65536 /* HasExplicitReturn */) {
+                            if (compilerOptions.noImplicitReturns) {
+                                error(node.name, ts.Diagnostics.Not_all_code_paths_return_a_value);
+                            }
+                        }
+                        else {
+                            error(node.name, ts.Diagnostics.A_get_accessor_must_return_a_value);
+                        }
+                    }
+                }
+                // Do not use hasDynamicName here, because that returns false for well known symbols.
+                // We want to perform checkComputedPropertyName for all computed properties, including
+                // well known symbols.
+                if (node.name.kind === 140 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(node.name);
+                }
+                if (!ts.hasDynamicName(node)) {
+                    // TypeScript 1.0 spec (April 2014): 8.4.3
+                    // Accessors for the same member name must specify the same accessibility.
+                    var otherKind = node.kind === 149 /* GetAccessor */ ? 150 /* SetAccessor */ : 149 /* GetAccessor */;
+                    var otherAccessor = ts.getDeclarationOfKind(node.symbol, otherKind);
+                    if (otherAccessor) {
+                        if (((node.flags & 28 /* AccessibilityModifier */) !== (otherAccessor.flags & 28 /* AccessibilityModifier */))) {
+                            error(node.name, ts.Diagnostics.Getter_and_setter_accessors_do_not_agree_in_visibility);
+                        }
+                        if (((node.flags & 128 /* Abstract */) !== (otherAccessor.flags & 128 /* Abstract */))) {
+                            error(node.name, ts.Diagnostics.Accessors_must_both_be_abstract_or_non_abstract);
+                        }
+                        // TypeScript 1.0 spec (April 2014): 4.5
+                        // If both accessors include type annotations, the specified types must be identical.
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_type);
+                        checkAccessorDeclarationTypesIdentical(node, otherAccessor, getAnnotatedAccessorThisType, ts.Diagnostics.get_and_set_accessor_must_have_the_same_this_type);
+                    }
+                }
+                getTypeOfAccessors(getSymbolOfNode(node));
+            }
+            if (node.parent.kind !== 171 /* ObjectLiteralExpression */) {
+                checkSourceElement(node.body);
+            }
+            else {
+                checkNodeDeferred(node);
+            }
+        }
+        function checkAccessorDeclarationTypesIdentical(first, second, getAnnotatedType, message) {
+            var firstType = getAnnotatedType(first);
+            var secondType = getAnnotatedType(second);
+            if (firstType && secondType && !isTypeIdenticalTo(firstType, secondType)) {
+                error(first, message);
+            }
+        }
+        function checkAccessorDeferred(node) {
+            checkSourceElement(node.body);
+        }
+        function checkMissingDeclaration(node) {
+            checkDecorators(node);
+        }
+        function checkTypeArgumentConstraints(typeParameters, typeArgumentNodes) {
+            var typeArguments;
+            var mapper;
+            var result = true;
+            for (var i = 0; i < typeParameters.length; i++) {
+                var constraint = getConstraintOfTypeParameter(typeParameters[i]);
+                if (constraint) {
+                    if (!typeArguments) {
+                        typeArguments = ts.map(typeArgumentNodes, getTypeFromTypeNode);
+                        mapper = createTypeMapper(typeParameters, typeArguments);
+                    }
+                    var typeArgument = typeArguments[i];
+                    result = result && checkTypeAssignableTo(typeArgument, getTypeWithThisArgument(instantiateType(constraint, mapper), typeArgument), typeArgumentNodes[i], ts.Diagnostics.Type_0_does_not_satisfy_the_constraint_1);
+                }
+            }
+            return result;
+        }
+        function checkTypeReferenceNode(node) {
+            checkGrammarTypeArguments(node, node.typeArguments);
+            var type = getTypeFromTypeReference(node);
+            if (type !== unknownType && node.typeArguments) {
+                // Do type argument local checks only if referenced type is successfully resolved
+                ts.forEach(node.typeArguments, checkSourceElement);
+                if (produceDiagnostics) {
+                    var symbol = getNodeLinks(node).resolvedSymbol;
+                    var typeParameters = symbol.flags & 524288 /* TypeAlias */ ? getSymbolLinks(symbol).typeParameters : type.target.localTypeParameters;
+                    checkTypeArgumentConstraints(typeParameters, node.typeArguments);
+                }
+            }
+        }
+        function checkTypeQuery(node) {
+            getTypeFromTypeQueryNode(node);
+        }
+        function checkTypeLiteral(node) {
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                var type = getTypeFromTypeLiteralOrFunctionOrConstructorTypeNode(node);
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+                checkObjectTypeForDuplicateDeclarations(node);
+            }
+        }
+        function checkArrayType(node) {
+            checkSourceElement(node.elementType);
+        }
+        function checkTupleType(node) {
+            // Grammar checking
+            var hasErrorFromDisallowedTrailingComma = checkGrammarForDisallowedTrailingComma(node.elementTypes);
+            if (!hasErrorFromDisallowedTrailingComma && node.elementTypes.length === 0) {
+                grammarErrorOnNode(node, ts.Diagnostics.A_tuple_type_element_list_cannot_be_empty);
+            }
+            ts.forEach(node.elementTypes, checkSourceElement);
+        }
+        function checkUnionOrIntersectionType(node) {
+            ts.forEach(node.types, checkSourceElement);
+        }
+        function isPrivateWithinAmbient(node) {
+            return (node.flags & 8 /* Private */) && ts.isInAmbientContext(node);
+        }
+        function getEffectiveDeclarationFlags(n, flagsToCheck) {
+            var flags = ts.getCombinedNodeFlags(n);
+            // children of classes (even ambient classes) should not be marked as ambient or export
+            // because those flags have no useful semantics there.
+            if (n.parent.kind !== 222 /* InterfaceDeclaration */ &&
+                n.parent.kind !== 221 /* ClassDeclaration */ &&
+                n.parent.kind !== 192 /* ClassExpression */ &&
+                ts.isInAmbientContext(n)) {
+                if (!(flags & 2 /* Ambient */)) {
+                    // It is nested in an ambient context, which means it is automatically exported
+                    flags |= 1 /* Export */;
+                }
+                flags |= 2 /* Ambient */;
+            }
+            return flags & flagsToCheck;
+        }
+        function checkFunctionOrConstructorSymbol(symbol) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            function getCanonicalOverload(overloads, implementation) {
+                // Consider the canonical set of flags to be the flags of the bodyDeclaration or the first declaration
+                // Error on all deviations from this canonical set of flags
+                // The caveat is that if some overloads are defined in lib.d.ts, we don't want to
+                // report the errors on those. To achieve this, we will say that the implementation is
+                // the canonical signature only if it is in the same container as the first overload
+                var implementationSharesContainerWithFirstOverload = implementation !== undefined && implementation.parent === overloads[0].parent;
+                return implementationSharesContainerWithFirstOverload ? implementation : overloads[0];
+            }
+            function checkFlagAgreementBetweenOverloads(overloads, implementation, flagsToCheck, someOverloadFlags, allOverloadFlags) {
+                // Error if some overloads have a flag that is not shared by all overloads. To find the
+                // deviations, we XOR someOverloadFlags with allOverloadFlags
+                var someButNotAllOverloadFlags = someOverloadFlags ^ allOverloadFlags;
+                if (someButNotAllOverloadFlags !== 0) {
+                    var canonicalFlags_1 = getEffectiveDeclarationFlags(getCanonicalOverload(overloads, implementation), flagsToCheck);
+                    ts.forEach(overloads, function (o) {
+                        var deviation = getEffectiveDeclarationFlags(o, flagsToCheck) ^ canonicalFlags_1;
+                        if (deviation & 1 /* Export */) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_exported_or_non_exported);
+                        }
+                        else if (deviation & 2 /* Ambient */) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_ambient_or_non_ambient);
+                        }
+                        else if (deviation & (8 /* Private */ | 16 /* Protected */)) {
+                            error(o.name || o, ts.Diagnostics.Overload_signatures_must_all_be_public_private_or_protected);
+                        }
+                        else if (deviation & 128 /* Abstract */) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_abstract_or_non_abstract);
+                        }
+                    });
+                }
+            }
+            function checkQuestionTokenAgreementBetweenOverloads(overloads, implementation, someHaveQuestionToken, allHaveQuestionToken) {
+                if (someHaveQuestionToken !== allHaveQuestionToken) {
+                    var canonicalHasQuestionToken_1 = ts.hasQuestionToken(getCanonicalOverload(overloads, implementation));
+                    ts.forEach(overloads, function (o) {
+                        var deviation = ts.hasQuestionToken(o) !== canonicalHasQuestionToken_1;
+                        if (deviation) {
+                            error(o.name, ts.Diagnostics.Overload_signatures_must_all_be_optional_or_required);
+                        }
+                    });
+                }
+            }
+            var flagsToCheck = 1 /* Export */ | 2 /* Ambient */ | 8 /* Private */ | 16 /* Protected */ | 128 /* Abstract */;
+            var someNodeFlags = 0;
+            var allNodeFlags = flagsToCheck;
+            var someHaveQuestionToken = false;
+            var allHaveQuestionToken = true;
+            var hasOverloads = false;
+            var bodyDeclaration;
+            var lastSeenNonAmbientDeclaration;
+            var previousDeclaration;
+            var declarations = symbol.declarations;
+            var isConstructor = (symbol.flags & 16384 /* Constructor */) !== 0;
+            function reportImplementationExpectedError(node) {
+                if (node.name && ts.nodeIsMissing(node.name)) {
+                    return;
+                }
+                var seen = false;
+                var subsequentNode = ts.forEachChild(node.parent, function (c) {
+                    if (seen) {
+                        return c;
+                    }
+                    else {
+                        seen = c === node;
+                    }
+                });
+                // We may be here because of some extra nodes between overloads that could not be parsed into a valid node.
+                // In this case the subsequent node is not really consecutive (.pos !== node.end), and we must ignore it here.
+                if (subsequentNode && subsequentNode.pos === node.end) {
+                    if (subsequentNode.kind === node.kind) {
+                        var errorNode_1 = subsequentNode.name || subsequentNode;
+                        // TODO(jfreeman): These are methods, so handle computed name case
+                        if (node.name && subsequentNode.name && node.name.text === subsequentNode.name.text) {
+                            var reportError = (node.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) &&
+                                (node.flags & 32 /* Static */) !== (subsequentNode.flags & 32 /* Static */);
+                            // we can get here in two cases
+                            // 1. mixed static and instance class members
+                            // 2. something with the same name was defined before the set of overloads that prevents them from merging
+                            // here we'll report error only for the first case since for second we should already report error in binder
+                            if (reportError) {
+                                var diagnostic = node.flags & 32 /* Static */ ? ts.Diagnostics.Function_overload_must_be_static : ts.Diagnostics.Function_overload_must_not_be_static;
+                                error(errorNode_1, diagnostic);
+                            }
+                            return;
+                        }
+                        else if (ts.nodeIsPresent(subsequentNode.body)) {
+                            error(errorNode_1, ts.Diagnostics.Function_implementation_name_must_be_0, ts.declarationNameToString(node.name));
+                            return;
+                        }
+                    }
+                }
+                var errorNode = node.name || node;
+                if (isConstructor) {
+                    error(errorNode, ts.Diagnostics.Constructor_implementation_is_missing);
+                }
+                else {
+                    // Report different errors regarding non-consecutive blocks of declarations depending on whether
+                    // the node in question is abstract.
+                    if (node.flags & 128 /* Abstract */) {
+                        error(errorNode, ts.Diagnostics.All_declarations_of_an_abstract_method_must_be_consecutive);
+                    }
+                    else {
+                        error(errorNode, ts.Diagnostics.Function_implementation_is_missing_or_not_immediately_following_the_declaration);
+                    }
+                }
+            }
+            // when checking exported function declarations across modules check only duplicate implementations
+            // names and consistency of modifiers are verified when we check local symbol
+            var isExportSymbolInsideModule = symbol.parent && symbol.parent.flags & 1536 /* Module */;
+            var duplicateFunctionDeclaration = false;
+            var multipleConstructorImplementation = false;
+            for (var _i = 0, declarations_4 = declarations; _i < declarations_4.length; _i++) {
+                var current = declarations_4[_i];
+                var node = current;
+                var inAmbientContext = ts.isInAmbientContext(node);
+                var inAmbientContextOrInterface = node.parent.kind === 222 /* InterfaceDeclaration */ || node.parent.kind === 159 /* TypeLiteral */ || inAmbientContext;
+                if (inAmbientContextOrInterface) {
+                    // check if declarations are consecutive only if they are non-ambient
+                    // 1. ambient declarations can be interleaved
+                    // i.e. this is legal
+                    //     declare function foo();
+                    //     declare function bar();
+                    //     declare function foo();
+                    // 2. mixing ambient and non-ambient declarations is a separate error that will be reported - do not want to report an extra one
+                    previousDeclaration = undefined;
+                }
+                if (node.kind === 220 /* FunctionDeclaration */ || node.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */ || node.kind === 148 /* Constructor */) {
+                    var currentNodeFlags = getEffectiveDeclarationFlags(node, flagsToCheck);
+                    someNodeFlags |= currentNodeFlags;
+                    allNodeFlags &= currentNodeFlags;
+                    someHaveQuestionToken = someHaveQuestionToken || ts.hasQuestionToken(node);
+                    allHaveQuestionToken = allHaveQuestionToken && ts.hasQuestionToken(node);
+                    if (ts.nodeIsPresent(node.body) && bodyDeclaration) {
+                        if (isConstructor) {
+                            multipleConstructorImplementation = true;
+                        }
+                        else {
+                            duplicateFunctionDeclaration = true;
+                        }
+                    }
+                    else if (!isExportSymbolInsideModule && previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
+                        reportImplementationExpectedError(previousDeclaration);
+                    }
+                    if (ts.nodeIsPresent(node.body)) {
+                        if (!bodyDeclaration) {
+                            bodyDeclaration = node;
+                        }
+                    }
+                    else {
+                        hasOverloads = true;
+                    }
+                    previousDeclaration = node;
+                    if (!inAmbientContextOrInterface) {
+                        lastSeenNonAmbientDeclaration = node;
+                    }
+                }
+            }
+            if (multipleConstructorImplementation) {
+                ts.forEach(declarations, function (declaration) {
+                    error(declaration, ts.Diagnostics.Multiple_constructor_implementations_are_not_allowed);
+                });
+            }
+            if (duplicateFunctionDeclaration) {
+                ts.forEach(declarations, function (declaration) {
+                    error(declaration.name, ts.Diagnostics.Duplicate_function_implementation);
+                });
+            }
+            // Abstract methods can't have an implementation -- in particular, they don't need one.
+            if (!isExportSymbolInsideModule && lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
+                !(lastSeenNonAmbientDeclaration.flags & 128 /* Abstract */) && !lastSeenNonAmbientDeclaration.questionToken) {
+                reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
+            }
+            if (hasOverloads) {
+                checkFlagAgreementBetweenOverloads(declarations, bodyDeclaration, flagsToCheck, someNodeFlags, allNodeFlags);
+                checkQuestionTokenAgreementBetweenOverloads(declarations, bodyDeclaration, someHaveQuestionToken, allHaveQuestionToken);
+                if (bodyDeclaration) {
+                    var signatures = getSignaturesOfSymbol(symbol);
+                    var bodySignature = getSignatureFromDeclaration(bodyDeclaration);
+                    for (var _a = 0, signatures_3 = signatures; _a < signatures_3.length; _a++) {
+                        var signature = signatures_3[_a];
+                        if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
+                            error(signature.declaration, ts.Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+        function checkExportsOnMergedDeclarations(node) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            // if localSymbol is defined on node then node itself is exported - check is required
+            var symbol = node.localSymbol;
+            if (!symbol) {
+                // local symbol is undefined => this declaration is non-exported.
+                // however symbol might contain other declarations that are exported
+                symbol = getSymbolOfNode(node);
+                if (!(symbol.flags & 7340032 /* Export */)) {
+                    // this is a pure local symbol (all declarations are non-exported) - no need to check anything
+                    return;
+                }
+            }
+            // run the check only for the first declaration in the list
+            if (ts.getDeclarationOfKind(symbol, node.kind) !== node) {
+                return;
+            }
+            // we use SymbolFlags.ExportValue, SymbolFlags.ExportType and SymbolFlags.ExportNamespace
+            // to denote disjoint declarationSpaces (without making new enum type).
+            var exportedDeclarationSpaces = 0 /* None */;
+            var nonExportedDeclarationSpaces = 0 /* None */;
+            var defaultExportedDeclarationSpaces = 0 /* None */;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var d = _a[_i];
+                var declarationSpaces = getDeclarationSpaces(d);
+                var effectiveDeclarationFlags = getEffectiveDeclarationFlags(d, 1 /* Export */ | 512 /* Default */);
+                if (effectiveDeclarationFlags & 1 /* Export */) {
+                    if (effectiveDeclarationFlags & 512 /* Default */) {
+                        defaultExportedDeclarationSpaces |= declarationSpaces;
+                    }
+                    else {
+                        exportedDeclarationSpaces |= declarationSpaces;
+                    }
+                }
+                else {
+                    nonExportedDeclarationSpaces |= declarationSpaces;
+                }
+            }
+            // Spaces for anything not declared a 'default export'.
+            var nonDefaultExportedDeclarationSpaces = exportedDeclarationSpaces | nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForExportsAndLocals = exportedDeclarationSpaces & nonExportedDeclarationSpaces;
+            var commonDeclarationSpacesForDefaultAndNonDefault = defaultExportedDeclarationSpaces & nonDefaultExportedDeclarationSpaces;
+            if (commonDeclarationSpacesForExportsAndLocals || commonDeclarationSpacesForDefaultAndNonDefault) {
+                // declaration spaces for exported and non-exported declarations intersect
+                for (var _b = 0, _c = symbol.declarations; _b < _c.length; _b++) {
+                    var d = _c[_b];
+                    var declarationSpaces = getDeclarationSpaces(d);
+                    // Only error on the declarations that contributed to the intersecting spaces.
+                    if (declarationSpaces & commonDeclarationSpacesForDefaultAndNonDefault) {
+                        error(d.name, ts.Diagnostics.Merged_declaration_0_cannot_include_a_default_export_declaration_Consider_adding_a_separate_export_default_0_declaration_instead, ts.declarationNameToString(d.name));
+                    }
+                    else if (declarationSpaces & commonDeclarationSpacesForExportsAndLocals) {
+                        error(d.name, ts.Diagnostics.Individual_declarations_in_merged_declaration_0_must_be_all_exported_or_all_local, ts.declarationNameToString(d.name));
+                    }
+                }
+            }
+            function getDeclarationSpaces(d) {
+                switch (d.kind) {
+                    case 222 /* InterfaceDeclaration */:
+                        return 2097152 /* ExportType */;
+                    case 225 /* ModuleDeclaration */:
+                        return ts.isAmbientModule(d) || ts.getModuleInstanceState(d) !== 0 /* NonInstantiated */
+                            ? 4194304 /* ExportNamespace */ | 1048576 /* ExportValue */
+                            : 4194304 /* ExportNamespace */;
+                    case 221 /* ClassDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                        return 2097152 /* ExportType */ | 1048576 /* ExportValue */;
+                    case 229 /* ImportEqualsDeclaration */:
+                        var result_1 = 0;
+                        var target = resolveAlias(getSymbolOfNode(d));
+                        ts.forEach(target.declarations, function (d) { result_1 |= getDeclarationSpaces(d); });
+                        return result_1;
+                    default:
+                        return 1048576 /* ExportValue */;
+                }
+            }
+        }
+        function checkNonThenableType(type, location, message) {
+            type = getWidenedType(type);
+            if (!isTypeAny(type) && isTypeAssignableTo(type, getGlobalThenableType())) {
+                if (location) {
+                    if (!message) {
+                        message = ts.Diagnostics.Operand_for_await_does_not_have_a_valid_callable_then_member;
+                    }
+                    error(location, message);
+                }
+                return unknownType;
+            }
+            return type;
+        }
+        /**
+          * Gets the "promised type" of a promise.
+          * @param type The type of the promise.
+          * @remarks The "promised type" of a type is the type of the "value" parameter of the "onfulfilled" callback.
+          */
+        function getPromisedType(promise) {
+            //
+            //  { // promise
+            //      then( // thenFunction
+            //          onfulfilled: ( // onfulfilledParameterType
+            //              value: T // valueParameterType
+            //          ) => any
+            //      ): any;
+            //  }
+            //
+            if (promise.flags & 1 /* Any */) {
+                return undefined;
+            }
+            if ((promise.flags & 4096 /* Reference */) && promise.target === tryGetGlobalPromiseType()) {
+                return promise.typeArguments[0];
+            }
+            var globalPromiseLikeType = getInstantiatedGlobalPromiseLikeType();
+            if (globalPromiseLikeType === emptyObjectType || !isTypeAssignableTo(promise, globalPromiseLikeType)) {
+                return undefined;
+            }
+            var thenFunction = getTypeOfPropertyOfType(promise, "then");
+            if (thenFunction && (thenFunction.flags & 1 /* Any */)) {
+                return undefined;
+            }
+            var thenSignatures = thenFunction ? getSignaturesOfType(thenFunction, 0 /* Call */) : emptyArray;
+            if (thenSignatures.length === 0) {
+                return undefined;
+            }
+            var onfulfilledParameterType = getTypeWithFacts(getUnionType(ts.map(thenSignatures, getTypeOfFirstParameterOfSignature)), 131072 /* NEUndefined */);
+            if (onfulfilledParameterType.flags & 1 /* Any */) {
+                return undefined;
+            }
+            var onfulfilledParameterSignatures = getSignaturesOfType(onfulfilledParameterType, 0 /* Call */);
+            if (onfulfilledParameterSignatures.length === 0) {
+                return undefined;
+            }
+            var valueParameterType = getUnionType(ts.map(onfulfilledParameterSignatures, getTypeOfFirstParameterOfSignature));
+            return valueParameterType;
+        }
+        function getTypeOfFirstParameterOfSignature(signature) {
+            return getTypeAtPosition(signature, 0);
+        }
+        /**
+          * Gets the "awaited type" of a type.
+          * @param type The type to await.
+          * @remarks The "awaited type" of an expression is its "promised type" if the expression is a
+          * Promise-like type; otherwise, it is the type of the expression. This is used to reflect
+          * The runtime behavior of the `await` keyword.
+          */
+        function getAwaitedType(type) {
+            return checkAwaitedType(type, /*location*/ undefined, /*message*/ undefined);
+        }
+        function checkAwaitedType(type, location, message) {
+            return checkAwaitedTypeWorker(type);
+            function checkAwaitedTypeWorker(type) {
+                if (type.flags & 16384 /* Union */) {
+                    var types = [];
+                    for (var _i = 0, _a = type.types; _i < _a.length; _i++) {
+                        var constituentType = _a[_i];
+                        types.push(checkAwaitedTypeWorker(constituentType));
+                    }
+                    return getUnionType(types);
+                }
+                else {
+                    var promisedType = getPromisedType(type);
+                    if (promisedType === undefined) {
+                        // The type was not a PromiseLike, so it could not be unwrapped any further.
+                        // As long as the type does not have a callable "then" property, it is
+                        // safe to return the type; otherwise, an error will have been reported in
+                        // the call to checkNonThenableType and we will return unknownType.
+                        //
+                        // An example of a non-promise "thenable" might be:
+                        //
+                        //  await { then(): void {} }
+                        //
+                        // The "thenable" does not match the minimal definition for a PromiseLike. When
+                        // a Promise/A+-compatible or ES6 promise tries to adopt this value, the promise
+                        // will never settle. We treat this as an error to help flag an early indicator
+                        // of a runtime problem. If the user wants to return this value from an async
+                        // function, they would need to wrap it in some other value. If they want it to
+                        // be treated as a promise, they can cast to <any>.
+                        return checkNonThenableType(type, location, message);
+                    }
+                    else {
+                        if (type.id === promisedType.id || ts.indexOf(awaitedTypeStack, promisedType.id) >= 0) {
+                            // We have a bad actor in the form of a promise whose promised type is
+                            // the same promise type, or a mutually recursive promise. Return the
+                            // unknown type as we cannot guess the shape. If this were the actual
+                            // case in the JavaScript, this Promise would never resolve.
+                            //
+                            // An example of a bad actor with a singly-recursive promise type might
+                            // be:
+                            //
+                            //  interface BadPromise {
+                            //      then(
+                            //          onfulfilled: (value: BadPromise) => any,
+                            //          onrejected: (error: any) => any): BadPromise;
+                            //  }
+                            //
+                            // The above interface will pass the PromiseLike check, and return a
+                            // promised type of `BadPromise`. Since this is a self reference, we
+                            // don't want to keep recursing ad infinitum.
+                            //
+                            // An example of a bad actor in the form of a mutually-recursive
+                            // promise type might be:
+                            //
+                            //  interface BadPromiseA {
+                            //      then(
+                            //          onfulfilled: (value: BadPromiseB) => any,
+                            //          onrejected: (error: any) => any): BadPromiseB;
+                            //  }
+                            //
+                            //  interface BadPromiseB {
+                            //      then(
+                            //          onfulfilled: (value: BadPromiseA) => any,
+                            //          onrejected: (error: any) => any): BadPromiseA;
+                            //  }
+                            //
+                            if (location) {
+                                error(location, ts.Diagnostics._0_is_referenced_directly_or_indirectly_in_the_fulfillment_callback_of_its_own_then_method, symbolToString(type.symbol));
+                            }
+                            return unknownType;
+                        }
+                        // Keep track of the type we're about to unwrap to avoid bad recursive promise types.
+                        // See the comments above for more information.
+                        awaitedTypeStack.push(type.id);
+                        var awaitedType = checkAwaitedTypeWorker(promisedType);
+                        awaitedTypeStack.pop();
+                        return awaitedType;
+                    }
+                }
+            }
+        }
+        /**
+         * Checks that the return type provided is an instantiation of the global Promise<T> type
+         * and returns the awaited type of the return type.
+         *
+         * @param returnType The return type of a FunctionLikeDeclaration
+         * @param location The node on which to report the error.
+         */
+        function checkCorrectPromiseType(returnType, location) {
+            if (returnType === unknownType) {
+                // The return type already had some other error, so we ignore and return
+                // the unknown type.
+                return unknownType;
+            }
+            var globalPromiseType = getGlobalPromiseType();
+            if (globalPromiseType === emptyGenericType
+                || globalPromiseType === getTargetType(returnType)) {
+                // Either we couldn't resolve the global promise type, which would have already
+                // reported an error, or we could resolve it and the return type is a valid type
+                // reference to the global type. In either case, we return the awaited type for
+                // the return type.
+                return checkAwaitedType(returnType, location, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+            }
+            // The promise type was not a valid type reference to the global promise type, so we
+            // report an error and return the unknown type.
+            error(location, ts.Diagnostics.The_return_type_of_an_async_function_or_method_must_be_the_global_Promise_T_type);
+            return unknownType;
+        }
+        /**
+          * Checks the return type of an async function to ensure it is a compatible
+          * Promise implementation.
+          * @param node The signature to check
+          * @param returnType The return type for the function
+          * @remarks
+          * This checks that an async function has a valid Promise-compatible return type,
+          * and returns the *awaited type* of the promise. An async function has a valid
+          * Promise-compatible return type if the resolved value of the return type has a
+          * construct signature that takes in an `initializer` function that in turn supplies
+          * a `resolve` function as one of its arguments and results in an object with a
+          * callable `then` signature.
+          */
+        function checkAsyncFunctionReturnType(node) {
+            if (languageVersion >= 2 /* ES6 */) {
+                var returnType = getTypeFromTypeNode(node.type);
+                return checkCorrectPromiseType(returnType, node.type);
+            }
+            var globalPromiseConstructorLikeType = getGlobalPromiseConstructorLikeType();
+            if (globalPromiseConstructorLikeType === emptyObjectType) {
+                // If we couldn't resolve the global PromiseConstructorLike type we cannot verify
+                // compatibility with __awaiter.
+                return unknownType;
+            }
+            // As part of our emit for an async function, we will need to emit the entity name of
+            // the return type annotation as an expression. To meet the necessary runtime semantics
+            // for __awaiter, we must also check that the type of the declaration (e.g. the static
+            // side or "constructor" of the promise type) is compatible `PromiseConstructorLike`.
+            //
+            // An example might be (from lib.es6.d.ts):
+            //
+            //  interface Promise<T> { ... }
+            //  interface PromiseConstructor {
+            //      new <T>(...): Promise<T>;
+            //  }
+            //  declare var Promise: PromiseConstructor;
+            //
+            // When an async function declares a return type annotation of `Promise<T>`, we
+            // need to get the type of the `Promise` variable declaration above, which would
+            // be `PromiseConstructor`.
+            //
+            // The same case applies to a class:
+            //
+            //  declare class Promise<T> {
+            //      constructor(...);
+            //      then<U>(...): Promise<U>;
+            //  }
+            //
+            // When we get the type of the `Promise` symbol here, we get the type of the static
+            // side of the `Promise` class, which would be `{ new <T>(...): Promise<T> }`.
+            var promiseType = getTypeFromTypeNode(node.type);
+            if (promiseType === unknownType && compilerOptions.isolatedModules) {
+                // If we are compiling with isolatedModules, we may not be able to resolve the
+                // type as a value. As such, we will just return unknownType;
+                return unknownType;
+            }
+            var promiseConstructor = getNodeLinks(node.type).resolvedSymbol;
+            if (!promiseConstructor || !symbolIsValue(promiseConstructor)) {
+                var typeName = promiseConstructor
+                    ? symbolToString(promiseConstructor)
+                    : typeToString(promiseType);
+                error(node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type, typeName);
+                return unknownType;
+            }
+            // If the Promise constructor, resolved locally, is an alias symbol we should mark it as referenced.
+            checkReturnTypeAnnotationAsExpression(node);
+            // Validate the promise constructor type.
+            var promiseConstructorType = getTypeOfSymbol(promiseConstructor);
+            if (!checkTypeAssignableTo(promiseConstructorType, globalPromiseConstructorLikeType, node, ts.Diagnostics.Type_0_is_not_a_valid_async_function_return_type)) {
+                return unknownType;
+            }
+            // Verify there is no local declaration that could collide with the promise constructor.
+            var promiseName = ts.getEntityNameFromTypeNode(node.type);
+            var promiseNameOrNamespaceRoot = getFirstIdentifier(promiseName);
+            var rootSymbol = getSymbol(node.locals, promiseNameOrNamespaceRoot.text, 107455 /* Value */);
+            if (rootSymbol) {
+                error(rootSymbol.valueDeclaration, ts.Diagnostics.Duplicate_identifier_0_Compiler_uses_declaration_1_to_support_async_functions, promiseNameOrNamespaceRoot.text, getFullyQualifiedName(promiseConstructor));
+                return unknownType;
+            }
+            // Get and return the awaited type of the return type.
+            return checkAwaitedType(promiseType, node, ts.Diagnostics.An_async_function_or_method_must_have_a_valid_awaitable_return_type);
+        }
+        /** Check a decorator */
+        function checkDecorator(node) {
+            var signature = getResolvedSignature(node);
+            var returnType = getReturnTypeOfSignature(signature);
+            if (returnType.flags & 1 /* Any */) {
+                return;
+            }
+            var expectedReturnType;
+            var headMessage = getDiagnosticHeadMessageForDecoratorResolution(node);
+            var errorInfo;
+            switch (node.parent.kind) {
+                case 221 /* ClassDeclaration */:
+                    var classSymbol = getSymbolOfNode(node.parent);
+                    var classConstructorType = getTypeOfSymbol(classSymbol);
+                    expectedReturnType = getUnionType([classConstructorType, voidType]);
+                    break;
+                case 142 /* Parameter */:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_parameter_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 145 /* PropertyDeclaration */:
+                    expectedReturnType = voidType;
+                    errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.The_return_type_of_a_property_decorator_function_must_be_either_void_or_any);
+                    break;
+                case 147 /* MethodDeclaration */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                    var methodType = getTypeOfNode(node.parent);
+                    var descriptorType = createTypedPropertyDescriptorType(methodType);
+                    expectedReturnType = getUnionType([descriptorType, voidType]);
+                    break;
+            }
+            checkTypeAssignableTo(returnType, expectedReturnType, node, headMessage, errorInfo);
+        }
+        /** Checks a type reference node as an expression. */
+        function checkTypeNodeAsExpression(node) {
+            // When we are emitting type metadata for decorators, we need to try to check the type
+            // as if it were an expression so that we can emit the type in a value position when we
+            // serialize the type metadata.
+            if (node && node.kind === 155 /* TypeReference */) {
+                var root = getFirstIdentifier(node.typeName);
+                var meaning = root.parent.kind === 155 /* TypeReference */ ? 793056 /* Type */ : 1536 /* Namespace */;
+                // Resolve type so we know which symbol is referenced
+                var rootSymbol = resolveName(root, root.text, meaning | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+                // Resolved symbol is alias
+                if (rootSymbol && rootSymbol.flags & 8388608 /* Alias */) {
+                    var aliasTarget = resolveAlias(rootSymbol);
+                    // If alias has value symbol - mark alias as referenced
+                    if (aliasTarget.flags & 107455 /* Value */ && !isConstEnumOrConstEnumOnlyModule(resolveAlias(rootSymbol))) {
+                        markAliasSymbolAsReferenced(rootSymbol);
+                    }
+                }
+            }
+        }
+        /**
+          * Checks the type annotation of an accessor declaration or property declaration as
+          * an expression if it is a type reference to a type with a value declaration.
+          */
+        function checkTypeAnnotationAsExpression(node) {
+            checkTypeNodeAsExpression(node.type);
+        }
+        function checkReturnTypeAnnotationAsExpression(node) {
+            checkTypeNodeAsExpression(node.type);
+        }
+        /** Checks the type annotation of the parameters of a function/method or the constructor of a class as expressions */
+        function checkParameterTypeAnnotationsAsExpressions(node) {
+            // ensure all type annotations with a value declaration are checked as an expression
+            for (var _i = 0, _a = node.parameters; _i < _a.length; _i++) {
+                var parameter = _a[_i];
+                checkTypeAnnotationAsExpression(parameter);
+            }
+        }
+        /** Check the decorators of a node */
+        function checkDecorators(node) {
+            if (!node.decorators) {
+                return;
+            }
+            // skip this check for nodes that cannot have decorators. These should have already had an error reported by
+            // checkGrammarDecorators.
+            if (!ts.nodeCanBeDecorated(node)) {
+                return;
+            }
+            if (!compilerOptions.experimentalDecorators) {
+                error(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning);
+            }
+            if (compilerOptions.emitDecoratorMetadata) {
+                // we only need to perform these checks if we are emitting serialized type metadata for the target of a decorator.
+                switch (node.kind) {
+                    case 221 /* ClassDeclaration */:
+                        var constructor = ts.getFirstConstructorWithBody(node);
+                        if (constructor) {
+                            checkParameterTypeAnnotationsAsExpressions(constructor);
+                        }
+                        break;
+                    case 147 /* MethodDeclaration */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        checkParameterTypeAnnotationsAsExpressions(node);
+                        checkReturnTypeAnnotationAsExpression(node);
+                        break;
+                    case 145 /* PropertyDeclaration */:
+                    case 142 /* Parameter */:
+                        checkTypeAnnotationAsExpression(node);
+                        break;
+                }
+            }
+            ts.forEach(node.decorators, checkDecorator);
+        }
+        function checkFunctionDeclaration(node) {
+            if (produceDiagnostics) {
+                checkFunctionOrMethodDeclaration(node) || checkGrammarForGenerator(node);
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+        }
+        function checkFunctionOrMethodDeclaration(node) {
+            checkDecorators(node);
+            checkSignatureDeclaration(node);
+            var isAsync = ts.isAsyncFunctionLike(node);
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name && node.name.kind === 140 /* ComputedPropertyName */) {
+                // This check will account for methods in class/interface declarations,
+                // as well as accessors in classes/object literals
+                checkComputedPropertyName(node.name);
+            }
+            if (!ts.hasDynamicName(node)) {
+                // first we want to check the local symbol that contain this declaration
+                // - if node.localSymbol !== undefined - this is current declaration is exported and localSymbol points to the local symbol
+                // - if node.localSymbol === undefined - this node is non-exported so we can just pick the result of getSymbolOfNode
+                var symbol = getSymbolOfNode(node);
+                var localSymbol = node.localSymbol || symbol;
+                // Since the javascript won't do semantic analysis like typescript,
+                // if the javascript file comes before the typescript file and both contain same name functions,
+                // checkFunctionOrConstructorSymbol wouldn't be called if we didnt ignore javascript function.
+                var firstDeclaration = ts.forEach(localSymbol.declarations, 
+                // Get first non javascript function declaration
+                function (declaration) { return declaration.kind === node.kind && !ts.isSourceFileJavaScript(ts.getSourceFileOfNode(declaration)) ?
+                    declaration : undefined; });
+                // Only type check the symbol once
+                if (node === firstDeclaration) {
+                    checkFunctionOrConstructorSymbol(localSymbol);
+                }
+                if (symbol.parent) {
+                    // run check once for the first declaration
+                    if (ts.getDeclarationOfKind(symbol, node.kind) === node) {
+                        // run check on export symbol to check that modifiers agree across all exported declarations
+                        checkFunctionOrConstructorSymbol(symbol);
+                    }
+                }
+            }
+            checkSourceElement(node.body);
+            if (!node.asteriskToken) {
+                var returnOrPromisedType = node.type && (isAsync ? checkAsyncFunctionReturnType(node) : getTypeFromTypeNode(node.type));
+                checkAllCodePathsInNonVoidFunctionReturnOrThrow(node, returnOrPromisedType);
+            }
+            if (produceDiagnostics && !node.type) {
+                // Report an implicit any error if there is no body, no explicit return type, and node is not a private method
+                // in an ambient context
+                if (compilerOptions.noImplicitAny && ts.nodeIsMissing(node.body) && !isPrivateWithinAmbient(node)) {
+                    reportImplicitAnyError(node, anyType);
+                }
+                if (node.asteriskToken && ts.nodeIsPresent(node.body)) {
+                    // A generator with a body and no type annotation can still cause errors. It can error if the
+                    // yielded values have no common supertype, or it can give an implicit any error if it has no
+                    // yielded values. The only way to trigger these errors is to try checking its return type.
+                    getReturnTypeOfSignature(getSignatureFromDeclaration(node));
+                }
+            }
+        }
+        function checkBlock(node) {
+            // Grammar checking for SyntaxKind.Block
+            if (node.kind === 199 /* Block */) {
+                checkGrammarStatementInAmbientContext(node);
+            }
+            ts.forEach(node.statements, checkSourceElement);
+        }
+        function checkCollisionWithArgumentsInGeneratedCode(node) {
+            // no rest parameters \ declaration context \ overload - no codegen impact
+            if (!ts.hasDeclaredRestParameter(node) || ts.isInAmbientContext(node) || ts.nodeIsMissing(node.body)) {
+                return;
+            }
+            ts.forEach(node.parameters, function (p) {
+                if (p.name && !ts.isBindingPattern(p.name) && p.name.text === argumentsSymbol.name) {
+                    error(p, ts.Diagnostics.Duplicate_identifier_arguments_Compiler_uses_arguments_to_initialize_rest_parameters);
+                }
+            });
+        }
+        function needCollisionCheckForIdentifier(node, identifier, name) {
+            if (!(identifier && identifier.text === name)) {
+                return false;
+            }
+            if (node.kind === 145 /* PropertyDeclaration */ ||
+                node.kind === 144 /* PropertySignature */ ||
+                node.kind === 147 /* MethodDeclaration */ ||
+                node.kind === 146 /* MethodSignature */ ||
+                node.kind === 149 /* GetAccessor */ ||
+                node.kind === 150 /* SetAccessor */) {
+                // it is ok to have member named '_super' or '_this' - member access is always qualified
+                return false;
+            }
+            if (ts.isInAmbientContext(node)) {
+                // ambient context - no codegen impact
+                return false;
+            }
+            var root = ts.getRootDeclaration(node);
+            if (root.kind === 142 /* Parameter */ && ts.nodeIsMissing(root.parent.body)) {
+                // just an overload - no codegen impact
+                return false;
+            }
+            return true;
+        }
+        function checkCollisionWithCapturedThisVariable(node, name) {
+            if (needCollisionCheckForIdentifier(node, name, "_this")) {
+                potentialThisCollisions.push(node);
+            }
+        }
+        // this function will run after checking the source file so 'CaptureThis' is correct for all nodes
+        function checkIfThisIsCapturedInEnclosingScope(node) {
+            var current = node;
+            while (current) {
+                if (getNodeCheckFlags(current) & 4 /* CaptureThis */) {
+                    var isDeclaration_1 = node.kind !== 69 /* Identifier */;
+                    if (isDeclaration_1) {
+                        error(node.name, ts.Diagnostics.Duplicate_identifier_this_Compiler_uses_variable_declaration_this_to_capture_this_reference);
+                    }
+                    else {
+                        error(node, ts.Diagnostics.Expression_resolves_to_variable_declaration_this_that_compiler_uses_to_capture_this_reference);
+                    }
+                    return;
+                }
+                current = current.parent;
+            }
+        }
+        function checkCollisionWithCapturedSuperVariable(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "_super")) {
+                return;
+            }
+            // bubble up and find containing type
+            var enclosingClass = ts.getContainingClass(node);
+            // if containing type was not found or it is ambient - exit (no codegen)
+            if (!enclosingClass || ts.isInAmbientContext(enclosingClass)) {
+                return;
+            }
+            if (ts.getClassExtendsHeritageClauseElement(enclosingClass)) {
+                var isDeclaration_2 = node.kind !== 69 /* Identifier */;
+                if (isDeclaration_2) {
+                    error(node, ts.Diagnostics.Duplicate_identifier_super_Compiler_uses_super_to_capture_base_class_reference);
+                }
+                else {
+                    error(node, ts.Diagnostics.Expression_resolves_to_super_that_compiler_uses_to_capture_base_class_reference);
+                }
+            }
+        }
+        function checkCollisionWithRequireExportsInGeneratedCode(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "require") && !needCollisionCheckForIdentifier(node, name, "exports")) {
+                return;
+            }
+            // Uninstantiated modules shouldnt do this check
+            if (node.kind === 225 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+                return;
+            }
+            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent)) {
+                // If the declaration happens to be in external module, report error that require and exports are reserved keywords
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            }
+        }
+        function checkCollisionWithGlobalPromiseInGeneratedCode(node, name) {
+            if (!needCollisionCheckForIdentifier(node, name, "Promise")) {
+                return;
+            }
+            // Uninstantiated modules shouldnt do this check
+            if (node.kind === 225 /* ModuleDeclaration */ && ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+                return;
+            }
+            // In case of variable declaration, node.parent is variable statement so look at the variable statement's parent
+            var parent = getDeclarationContainer(node);
+            if (parent.kind === 256 /* SourceFile */ && ts.isExternalOrCommonJsModule(parent) && parent.flags & 2097152 /* HasAsyncFunctions */) {
+                // If the declaration happens to be in external module, report error that Promise is a reserved identifier.
+                error(name, ts.Diagnostics.Duplicate_identifier_0_Compiler_reserves_name_1_in_top_level_scope_of_a_module_containing_async_functions, ts.declarationNameToString(name), ts.declarationNameToString(name));
+            }
+        }
+        function checkVarDeclaredNamesNotShadowed(node) {
+            // - ScriptBody : StatementList
+            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
+            // also occurs in the VarDeclaredNames of StatementList.
+            // - Block : { StatementList }
+            // It is a Syntax Error if any element of the LexicallyDeclaredNames of StatementList
+            // also occurs in the VarDeclaredNames of StatementList.
+            // Variable declarations are hoisted to the top of their function scope. They can shadow
+            // block scoped declarations, which bind tighter. this will not be flagged as duplicate definition
+            // by the binder as the declaration scope is different.
+            // A non-initialized declaration is a no-op as the block declaration will resolve before the var
+            // declaration. the problem is if the declaration has an initializer. this will act as a write to the
+            // block declared value. this is fine for let, but not const.
+            // Only consider declarations with initializers, uninitialized const declarations will not
+            // step on a let/const variable.
+            // Do not consider const and const declarations, as duplicate block-scoped declarations
+            // are handled by the binder.
+            // We are only looking for const declarations that step on let\const declarations from a
+            // different scope. e.g.:
+            //      {
+            //          const x = 0; // localDeclarationSymbol obtained after name resolution will correspond to this declaration
+            //          const x = 0; // symbol for this declaration will be 'symbol'
+            //      }
+            // skip block-scoped variables and parameters
+            if ((ts.getCombinedNodeFlags(node) & 3072 /* BlockScoped */) !== 0 || ts.isParameterDeclaration(node)) {
+                return;
+            }
+            // skip variable declarations that don't have initializers
+            // NOTE: in ES6 spec initializer is required in variable declarations where name is binding pattern
+            // so we'll always treat binding elements as initialized
+            if (node.kind === 218 /* VariableDeclaration */ && !node.initializer) {
+                return;
+            }
+            var symbol = getSymbolOfNode(node);
+            if (symbol.flags & 1 /* FunctionScopedVariable */) {
+                var localDeclarationSymbol = resolveName(node, node.name.text, 3 /* Variable */, /*nodeNotFoundErrorMessage*/ undefined, /*nameArg*/ undefined);
+                if (localDeclarationSymbol &&
+                    localDeclarationSymbol !== symbol &&
+                    localDeclarationSymbol.flags & 2 /* BlockScopedVariable */) {
+                    if (getDeclarationFlagsFromSymbol(localDeclarationSymbol) & 3072 /* BlockScoped */) {
+                        var varDeclList = ts.getAncestor(localDeclarationSymbol.valueDeclaration, 219 /* VariableDeclarationList */);
+                        var container = varDeclList.parent.kind === 200 /* VariableStatement */ && varDeclList.parent.parent
+                            ? varDeclList.parent.parent
+                            : undefined;
+                        // names of block-scoped and function scoped variables can collide only
+                        // if block scoped variable is defined in the function\module\source file scope (because of variable hoisting)
+                        var namesShareScope = container &&
+                            (container.kind === 199 /* Block */ && ts.isFunctionLike(container.parent) ||
+                                container.kind === 226 /* ModuleBlock */ ||
+                                container.kind === 225 /* ModuleDeclaration */ ||
+                                container.kind === 256 /* SourceFile */);
+                        // here we know that function scoped variable is shadowed by block scoped one
+                        // if they are defined in the same scope - binder has already reported redeclaration error
+                        // otherwise if variable has an initializer - show error that initialization will fail
+                        // since LHS will be block scoped name instead of function scoped
+                        if (!namesShareScope) {
+                            var name_17 = symbolToString(localDeclarationSymbol);
+                            error(node, ts.Diagnostics.Cannot_initialize_outer_scoped_variable_0_in_the_same_scope_as_block_scoped_declaration_1, name_17, name_17);
+                        }
+                    }
+                }
+            }
+        }
+        // Check that a parameter initializer contains no references to parameters declared to the right of itself
+        function checkParameterInitializer(node) {
+            if (ts.getRootDeclaration(node).kind !== 142 /* Parameter */) {
+                return;
+            }
+            var func = ts.getContainingFunction(node);
+            visit(node.initializer);
+            function visit(n) {
+                if (ts.isTypeNode(n) || ts.isDeclarationName(n)) {
+                    // do not dive in types
+                    // skip declaration names (i.e. in object literal expressions)
+                    return;
+                }
+                if (n.kind === 172 /* PropertyAccessExpression */) {
+                    // skip property names in property access expression
+                    return visit(n.expression);
+                }
+                else if (n.kind === 69 /* Identifier */) {
+                    // check FunctionLikeDeclaration.locals (stores parameters\function local variable)
+                    // if it contains entry with a specified name
+                    var symbol = resolveName(n, n.text, 107455 /* Value */ | 8388608 /* Alias */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+                    if (!symbol || symbol === unknownSymbol || !symbol.valueDeclaration) {
+                        return;
+                    }
+                    if (symbol.valueDeclaration === node) {
+                        error(n, ts.Diagnostics.Parameter_0_cannot_be_referenced_in_its_initializer, ts.declarationNameToString(node.name));
+                        return;
+                    }
+                    // locals map for function contain both parameters and function locals
+                    // so we need to do a bit of extra work to check if reference is legal
+                    var enclosingContainer = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (enclosingContainer === func) {
+                        if (symbol.valueDeclaration.kind === 142 /* Parameter */) {
+                            // it is ok to reference parameter in initializer if either
+                            // - parameter is located strictly on the left of current parameter declaration
+                            if (symbol.valueDeclaration.pos < node.pos) {
+                                return;
+                            }
+                            // - parameter is wrapped in function-like entity
+                            var current = n;
+                            while (current !== node.initializer) {
+                                if (ts.isFunctionLike(current.parent)) {
+                                    return;
+                                }
+                                // computed property names/initializers in instance property declaration of class like entities
+                                // are executed in constructor and thus deferred
+                                if (current.parent.kind === 145 /* PropertyDeclaration */ &&
+                                    !(current.parent.flags & 32 /* Static */) &&
+                                    ts.isClassLike(current.parent.parent)) {
+                                    return;
+                                }
+                                current = current.parent;
+                            }
+                        }
+                        error(n, ts.Diagnostics.Initializer_of_parameter_0_cannot_reference_identifier_1_declared_after_it, ts.declarationNameToString(node.name), ts.declarationNameToString(n));
+                    }
+                }
+                else {
+                    return ts.forEachChild(n, visit);
+                }
+            }
+        }
+        // Check variable, parameter, or property declaration
+        function checkVariableLikeDeclaration(node) {
+            checkDecorators(node);
+            checkSourceElement(node.type);
+            // For a computed property, just check the initializer and exit
+            // Do not use hasDynamicName here, because that returns false for well known symbols.
+            // We want to perform checkComputedPropertyName for all computed properties, including
+            // well known symbols.
+            if (node.name.kind === 140 /* ComputedPropertyName */) {
+                checkComputedPropertyName(node.name);
+                if (node.initializer) {
+                    checkExpressionCached(node.initializer);
+                }
+            }
+            if (node.kind === 169 /* BindingElement */) {
+                // check computed properties inside property names of binding elements
+                if (node.propertyName && node.propertyName.kind === 140 /* ComputedPropertyName */) {
+                    checkComputedPropertyName(node.propertyName);
+                }
+                // check private/protected variable access
+                var parent_11 = node.parent.parent;
+                var parentType = getTypeForBindingElementParent(parent_11);
+                var name_18 = node.propertyName || node.name;
+                var property = getPropertyOfType(parentType, getTextOfPropertyName(name_18));
+                if (parent_11.initializer && property && getParentOfSymbol(property)) {
+                    checkClassPropertyAccess(parent_11, parent_11.initializer, parentType, property);
+                }
+            }
+            // For a binding pattern, check contained binding elements
+            if (ts.isBindingPattern(node.name)) {
+                ts.forEach(node.name.elements, checkSourceElement);
+            }
+            // For a parameter declaration with an initializer, error and exit if the containing function doesn't have a body
+            if (node.initializer && ts.getRootDeclaration(node).kind === 142 /* Parameter */ && ts.nodeIsMissing(ts.getContainingFunction(node).body)) {
+                error(node, ts.Diagnostics.A_parameter_initializer_is_only_allowed_in_a_function_or_constructor_implementation);
+                return;
+            }
+            // For a binding pattern, validate the initializer and exit
+            if (ts.isBindingPattern(node.name)) {
+                // Don't validate for-in initializer as it is already an error
+                if (node.initializer && node.parent.parent.kind !== 207 /* ForInStatement */) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), getWidenedTypeForVariableLikeDeclaration(node), node, /*headMessage*/ undefined);
+                    checkParameterInitializer(node);
+                }
+                return;
+            }
+            var symbol = getSymbolOfNode(node);
+            var type = getTypeOfVariableOrParameterOrProperty(symbol);
+            if (node === symbol.valueDeclaration) {
+                // Node is the primary declaration of the symbol, just validate the initializer
+                // Don't validate for-in initializer as it is already an error
+                if (node.initializer && node.parent.parent.kind !== 207 /* ForInStatement */) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), type, node, /*headMessage*/ undefined);
+                    checkParameterInitializer(node);
+                }
+            }
+            else {
+                // Node is a secondary declaration, check that type is identical to primary declaration and check that
+                // initializer is consistent with type associated with the node
+                var declarationType = getWidenedTypeForVariableLikeDeclaration(node);
+                if (type !== unknownType && declarationType !== unknownType && !isTypeIdenticalTo(type, declarationType)) {
+                    error(node.name, ts.Diagnostics.Subsequent_variable_declarations_must_have_the_same_type_Variable_0_must_be_of_type_1_but_here_has_type_2, ts.declarationNameToString(node.name), typeToString(type), typeToString(declarationType));
+                }
+                if (node.initializer) {
+                    checkTypeAssignableTo(checkExpressionCached(node.initializer), declarationType, node, /*headMessage*/ undefined);
+                }
+                if (!areDeclarationFlagsIdentical(node, symbol.valueDeclaration)) {
+                    error(symbol.valueDeclaration.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                    error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_modifiers, ts.declarationNameToString(node.name));
+                }
+            }
+            if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */) {
+                // We know we don't have a binding pattern or computed name here
+                checkExportsOnMergedDeclarations(node);
+                if (node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) {
+                    checkVarDeclaredNamesNotShadowed(node);
+                }
+                checkCollisionWithCapturedSuperVariable(node, node.name);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+        }
+        function areDeclarationFlagsIdentical(left, right) {
+            if ((left.kind === 142 /* Parameter */ && right.kind === 218 /* VariableDeclaration */) ||
+                (left.kind === 218 /* VariableDeclaration */ && right.kind === 142 /* Parameter */)) {
+                // Differences in optionality between parameters and variables are allowed.
+                return true;
+            }
+            if (ts.hasQuestionToken(left) !== ts.hasQuestionToken(right)) {
+                return false;
+            }
+            var interestingFlags = 8 /* Private */ |
+                16 /* Protected */ |
+                256 /* Async */ |
+                128 /* Abstract */ |
+                64 /* Readonly */ |
+                32 /* Static */;
+            return (left.flags & interestingFlags) === (right.flags & interestingFlags);
+        }
+        function checkVariableDeclaration(node) {
+            checkGrammarVariableDeclaration(node);
+            return checkVariableLikeDeclaration(node);
+        }
+        function checkBindingElement(node) {
+            checkGrammarBindingElement(node);
+            return checkVariableLikeDeclaration(node);
+        }
+        function checkVariableStatement(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarVariableDeclarationList(node.declarationList) || checkGrammarForDisallowedLetOrConstStatement(node);
+            ts.forEach(node.declarationList.declarations, checkSourceElement);
+        }
+        function checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) {
+            // We only disallow modifier on a method declaration if it is a property of object-literal-expression
+            if (node.modifiers && node.parent.kind === 171 /* ObjectLiteralExpression */) {
+                if (ts.isAsyncFunctionLike(node)) {
+                    if (node.modifiers.length > 1) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                }
+                else {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                }
+            }
+        }
+        function checkExpressionStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+        }
+        function checkIfStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.thenStatement);
+            if (node.thenStatement.kind === 201 /* EmptyStatement */) {
+                error(node.thenStatement, ts.Diagnostics.The_body_of_an_if_statement_cannot_be_the_empty_statement);
+            }
+            checkSourceElement(node.elseStatement);
+        }
+        function checkDoStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkSourceElement(node.statement);
+            checkExpression(node.expression);
+        }
+        function checkWhileStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkExpression(node.expression);
+            checkSourceElement(node.statement);
+        }
+        function checkForStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.initializer && node.initializer.kind === 219 /* VariableDeclarationList */) {
+                    checkGrammarVariableDeclarationList(node.initializer);
+                }
+            }
+            if (node.initializer) {
+                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
+                    ts.forEach(node.initializer.declarations, checkVariableDeclaration);
+                }
+                else {
+                    checkExpression(node.initializer);
+                }
+            }
+            if (node.condition)
+                checkExpression(node.condition);
+            if (node.incrementor)
+                checkExpression(node.incrementor);
+            checkSourceElement(node.statement);
+        }
+        function checkForOfStatement(node) {
+            checkGrammarForInOrForOfStatement(node);
+            // Check the LHS and RHS
+            // If the LHS is a declaration, just check it as a variable declaration, which will in turn check the RHS
+            // via checkRightHandSideOfForOf.
+            // If the LHS is an expression, check the LHS, as a destructuring assignment or as a reference.
+            // Then check that the RHS is assignable to it.
+            if (node.initializer.kind === 219 /* VariableDeclarationList */) {
+                checkForInOrForOfVariableDeclaration(node);
+            }
+            else {
+                var varExpr = node.initializer;
+                var iteratedType = checkRightHandSideOfForOf(node.expression);
+                // There may be a destructuring assignment on the left side
+                if (varExpr.kind === 170 /* ArrayLiteralExpression */ || varExpr.kind === 171 /* ObjectLiteralExpression */) {
+                    // iteratedType may be undefined. In this case, we still want to check the structure of
+                    // varExpr, in particular making sure it's a valid LeftHandSideExpression. But we'd like
+                    // to short circuit the type relation checking as much as possible, so we pass the unknownType.
+                    checkDestructuringAssignment(varExpr, iteratedType || unknownType);
+                }
+                else {
+                    var leftType = checkExpression(varExpr);
+                    checkReferenceExpression(varExpr, /*invalidReferenceMessage*/ ts.Diagnostics.Invalid_left_hand_side_in_for_of_statement, 
+                    /*constantVariableMessage*/ ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_be_a_constant_or_a_read_only_property);
+                    // iteratedType will be undefined if the rightType was missing properties/signatures
+                    // required to get its iteratedType (like [Symbol.iterator] or next). This may be
+                    // because we accessed properties from anyType, or it may have led to an error inside
+                    // getElementTypeOfIterable.
+                    if (iteratedType) {
+                        checkTypeAssignableTo(iteratedType, leftType, varExpr, /*headMessage*/ undefined);
+                    }
+                }
+            }
+            checkSourceElement(node.statement);
+        }
+        function checkForInStatement(node) {
+            // Grammar checking
+            checkGrammarForInOrForOfStatement(node);
+            // TypeScript 1.0 spec  (April 2014): 5.4
+            // In a 'for-in' statement of the form
+            // for (let VarDecl in Expr) Statement
+            //   VarDecl must be a variable declaration without a type annotation that declares a variable of type Any,
+            //   and Expr must be an expression of type Any, an object type, or a type parameter type.
+            if (node.initializer.kind === 219 /* VariableDeclarationList */) {
+                var variable = node.initializer.declarations[0];
+                if (variable && ts.isBindingPattern(variable.name)) {
+                    error(variable.name, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                }
+                checkForInOrForOfVariableDeclaration(node);
+            }
+            else {
+                // In a 'for-in' statement of the form
+                // for (Var in Expr) Statement
+                //   Var must be an expression classified as a reference of type Any or the String primitive type,
+                //   and Expr must be an expression of type Any, an object type, or a type parameter type.
+                var varExpr = node.initializer;
+                var leftType = checkExpression(varExpr);
+                if (varExpr.kind === 170 /* ArrayLiteralExpression */ || varExpr.kind === 171 /* ObjectLiteralExpression */) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_destructuring_pattern);
+                }
+                else if (!isTypeAnyOrAllConstituentTypesHaveKind(leftType, 258 /* StringLike */)) {
+                    error(varExpr, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_must_be_of_type_string_or_any);
+                }
+                else {
+                    // run check only former check succeeded to avoid cascading errors
+                    checkReferenceExpression(varExpr, ts.Diagnostics.Invalid_left_hand_side_in_for_in_statement, ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_be_a_constant_or_a_read_only_property);
+                }
+            }
+            var rightType = checkNonNullExpression(node.expression);
+            // unknownType is returned i.e. if node.expression is identifier whose name cannot be resolved
+            // in this case error about missing name is already reported - do not report extra one
+            if (!isTypeAnyOrAllConstituentTypesHaveKind(rightType, 80896 /* ObjectType */ | 512 /* TypeParameter */)) {
+                error(node.expression, ts.Diagnostics.The_right_hand_side_of_a_for_in_statement_must_be_of_type_any_an_object_type_or_a_type_parameter);
+            }
+            checkSourceElement(node.statement);
+        }
+        function checkForInOrForOfVariableDeclaration(iterationStatement) {
+            var variableDeclarationList = iterationStatement.initializer;
+            // checkGrammarForInOrForOfStatement will check that there is exactly one declaration.
+            if (variableDeclarationList.declarations.length >= 1) {
+                var decl = variableDeclarationList.declarations[0];
+                checkVariableDeclaration(decl);
+            }
+        }
+        function checkRightHandSideOfForOf(rhsExpression) {
+            var expressionType = checkNonNullExpression(rhsExpression);
+            return checkIteratedTypeOrElementType(expressionType, rhsExpression, /*allowStringInput*/ true);
+        }
+        function checkIteratedTypeOrElementType(inputType, errorNode, allowStringInput) {
+            if (isTypeAny(inputType)) {
+                return inputType;
+            }
+            if (languageVersion >= 2 /* ES6 */) {
+                return checkElementTypeOfIterable(inputType, errorNode);
+            }
+            if (allowStringInput) {
+                return checkElementTypeOfArrayOrString(inputType, errorNode);
+            }
+            if (isArrayLikeType(inputType)) {
+                var indexType = getIndexTypeOfType(inputType, 1 /* Number */);
+                if (indexType) {
+                    return indexType;
+                }
+            }
+            if (errorNode) {
+                error(errorNode, ts.Diagnostics.Type_0_is_not_an_array_type, typeToString(inputType));
+            }
+            return unknownType;
+        }
+        /**
+         * When errorNode is undefined, it means we should not report any errors.
+         */
+        function checkElementTypeOfIterable(iterable, errorNode) {
+            var elementType = getElementTypeOfIterable(iterable, errorNode);
+            // Now even though we have extracted the iteratedType, we will have to validate that the type
+            // passed in is actually an Iterable.
+            if (errorNode && elementType) {
+                checkTypeAssignableTo(iterable, createIterableType(elementType), errorNode);
+            }
+            return elementType || anyType;
+        }
+        /**
+         * We want to treat type as an iterable, and get the type it is an iterable of. The iterable
+         * must have the following structure (annotated with the names of the variables below):
+         *
+         * { // iterable
+         *     [Symbol.iterator]: { // iteratorFunction
+         *         (): Iterator<T>
+         *     }
+         * }
+         *
+         * T is the type we are after. At every level that involves analyzing return types
+         * of signatures, we union the return types of all the signatures.
+         *
+         * Another thing to note is that at any step of this process, we could run into a dead end,
+         * meaning either the property is missing, or we run into the anyType. If either of these things
+         * happens, we return undefined to signal that we could not find the iterated type. If a property
+         * is missing, and the previous step did not result in 'any', then we also give an error if the
+         * caller requested it. Then the caller can decide what to do in the case where there is no iterated
+         * type. This is different from returning anyType, because that would signify that we have matched the
+         * whole pattern and that T (above) is 'any'.
+         */
+        function getElementTypeOfIterable(type, errorNode) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            var typeAsIterable = type;
+            if (!typeAsIterable.iterableElementType) {
+                // As an optimization, if the type is instantiated directly using the globalIterableType (Iterable<number>),
+                // then just grab its type argument.
+                if ((type.flags & 4096 /* Reference */) && type.target === getGlobalIterableType()) {
+                    typeAsIterable.iterableElementType = type.typeArguments[0];
+                }
+                else {
+                    var iteratorFunction = getTypeOfPropertyOfType(type, ts.getPropertyNameForKnownSymbolName("iterator"));
+                    if (isTypeAny(iteratorFunction)) {
+                        return undefined;
+                    }
+                    var iteratorFunctionSignatures = iteratorFunction ? getSignaturesOfType(iteratorFunction, 0 /* Call */) : emptyArray;
+                    if (iteratorFunctionSignatures.length === 0) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.Type_must_have_a_Symbol_iterator_method_that_returns_an_iterator);
+                        }
+                        return undefined;
+                    }
+                    typeAsIterable.iterableElementType = getElementTypeOfIterator(getUnionType(ts.map(iteratorFunctionSignatures, getReturnTypeOfSignature)), errorNode);
+                }
+            }
+            return typeAsIterable.iterableElementType;
+        }
+        /**
+         * This function has very similar logic as getElementTypeOfIterable, except that it operates on
+         * Iterators instead of Iterables. Here is the structure:
+         *
+         *  { // iterator
+         *      next: { // iteratorNextFunction
+         *          (): { // iteratorNextResult
+         *              value: T // iteratorNextValue
+         *          }
+         *      }
+         *  }
+         *
+         */
+        function getElementTypeOfIterator(type, errorNode) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            var typeAsIterator = type;
+            if (!typeAsIterator.iteratorElementType) {
+                // As an optimization, if the type is instantiated directly using the globalIteratorType (Iterator<number>),
+                // then just grab its type argument.
+                if ((type.flags & 4096 /* Reference */) && type.target === getGlobalIteratorType()) {
+                    typeAsIterator.iteratorElementType = type.typeArguments[0];
+                }
+                else {
+                    var iteratorNextFunction = getTypeOfPropertyOfType(type, "next");
+                    if (isTypeAny(iteratorNextFunction)) {
+                        return undefined;
+                    }
+                    var iteratorNextFunctionSignatures = iteratorNextFunction ? getSignaturesOfType(iteratorNextFunction, 0 /* Call */) : emptyArray;
+                    if (iteratorNextFunctionSignatures.length === 0) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.An_iterator_must_have_a_next_method);
+                        }
+                        return undefined;
+                    }
+                    var iteratorNextResult = getUnionType(ts.map(iteratorNextFunctionSignatures, getReturnTypeOfSignature));
+                    if (isTypeAny(iteratorNextResult)) {
+                        return undefined;
+                    }
+                    var iteratorNextValue = getTypeOfPropertyOfType(iteratorNextResult, "value");
+                    if (!iteratorNextValue) {
+                        if (errorNode) {
+                            error(errorNode, ts.Diagnostics.The_type_returned_by_the_next_method_of_an_iterator_must_have_a_value_property);
+                        }
+                        return undefined;
+                    }
+                    typeAsIterator.iteratorElementType = iteratorNextValue;
+                }
+            }
+            return typeAsIterator.iteratorElementType;
+        }
+        function getElementTypeOfIterableIterator(type) {
+            if (isTypeAny(type)) {
+                return undefined;
+            }
+            // As an optimization, if the type is instantiated directly using the globalIterableIteratorType (IterableIterator<number>),
+            // then just grab its type argument.
+            if ((type.flags & 4096 /* Reference */) && type.target === getGlobalIterableIteratorType()) {
+                return type.typeArguments[0];
+            }
+            return getElementTypeOfIterable(type, /*errorNode*/ undefined) ||
+                getElementTypeOfIterator(type, /*errorNode*/ undefined);
+        }
+        /**
+         * This function does the following steps:
+         *   1. Break up arrayOrStringType (possibly a union) into its string constituents and array constituents.
+         *   2. Take the element types of the array constituents.
+         *   3. Return the union of the element types, and string if there was a string constituent.
+         *
+         * For example:
+         *     string -> string
+         *     number[] -> number
+         *     string[] | number[] -> string | number
+         *     string | number[] -> string | number
+         *     string | string[] | number[] -> string | number
+         *
+         * It also errors if:
+         *   1. Some constituent is neither a string nor an array.
+         *   2. Some constituent is a string and target is less than ES5 (because in ES3 string is not indexable).
+         */
+        function checkElementTypeOfArrayOrString(arrayOrStringType, errorNode) {
+            ts.Debug.assert(languageVersion < 2 /* ES6 */);
+            // After we remove all types that are StringLike, we will know if there was a string constituent
+            // based on whether the remaining type is the same as the initial type.
+            var arrayType = arrayOrStringType;
+            if (arrayOrStringType.flags & 16384 /* Union */) {
+                arrayType = getUnionType(ts.filter(arrayOrStringType.types, function (t) { return !(t.flags & 258 /* StringLike */); }));
+            }
+            else if (arrayOrStringType.flags & 258 /* StringLike */) {
+                arrayType = neverType;
+            }
+            var hasStringConstituent = arrayOrStringType !== arrayType;
+            var reportedError = false;
+            if (hasStringConstituent) {
+                if (languageVersion < 1 /* ES5 */) {
+                    error(errorNode, ts.Diagnostics.Using_a_string_in_a_for_of_statement_is_only_supported_in_ECMAScript_5_and_higher);
+                    reportedError = true;
+                }
+                // Now that we've removed all the StringLike types, if no constituents remain, then the entire
+                // arrayOrStringType was a string.
+                if (arrayType === neverType) {
+                    return stringType;
+                }
+            }
+            if (!isArrayLikeType(arrayType)) {
+                if (!reportedError) {
+                    // Which error we report depends on whether there was a string constituent. For example,
+                    // if the input type is number | string, we want to say that number is not an array type.
+                    // But if the input was just number, we want to say that number is not an array type
+                    // or a string type.
+                    var diagnostic = hasStringConstituent
+                        ? ts.Diagnostics.Type_0_is_not_an_array_type
+                        : ts.Diagnostics.Type_0_is_not_an_array_type_or_a_string_type;
+                    error(errorNode, diagnostic, typeToString(arrayType));
+                }
+                return hasStringConstituent ? stringType : unknownType;
+            }
+            var arrayElementType = getIndexTypeOfType(arrayType, 1 /* Number */) || unknownType;
+            if (hasStringConstituent) {
+                // This is just an optimization for the case where arrayOrStringType is string | string[]
+                if (arrayElementType.flags & 258 /* StringLike */) {
+                    return stringType;
+                }
+                return getUnionType([arrayElementType, stringType]);
+            }
+            return arrayElementType;
+        }
+        function checkBreakOrContinueStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node) || checkGrammarBreakOrContinueStatement(node);
+            // TODO: Check that target label is valid
+        }
+        function isGetAccessorWithAnnotatedSetAccessor(node) {
+            return !!(node.kind === 149 /* GetAccessor */ && ts.getSetAccessorTypeAnnotationNode(ts.getDeclarationOfKind(node.symbol, 150 /* SetAccessor */)));
+        }
+        function isUnwrappedReturnTypeVoidOrAny(func, returnType) {
+            var unwrappedReturnType = ts.isAsyncFunctionLike(func) ? getPromisedType(returnType) : returnType;
+            return maybeTypeOfKind(unwrappedReturnType, 16 /* Void */ | 1 /* Any */);
+        }
+        function checkReturnStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                var functionBlock = ts.getContainingFunction(node);
+                if (!functionBlock) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.A_return_statement_can_only_be_used_within_a_function_body);
+                }
+            }
+            var func = ts.getContainingFunction(node);
+            if (func) {
+                var signature = getSignatureFromDeclaration(func);
+                var returnType = getReturnTypeOfSignature(signature);
+                if (strictNullChecks || node.expression || returnType === neverType) {
+                    var exprType = node.expression ? checkExpressionCached(node.expression) : undefinedType;
+                    if (func.asteriskToken) {
+                        // A generator does not need its return expressions checked against its return type.
+                        // Instead, the yield expressions are checked against the element type.
+                        // TODO: Check return expressions of generators when return type tracking is added
+                        // for generators.
+                        return;
+                    }
+                    if (func.kind === 150 /* SetAccessor */) {
+                        if (node.expression) {
+                            error(node.expression, ts.Diagnostics.Setters_cannot_return_a_value);
+                        }
+                    }
+                    else if (func.kind === 148 /* Constructor */) {
+                        if (node.expression && !checkTypeAssignableTo(exprType, returnType, node.expression)) {
+                            error(node.expression, ts.Diagnostics.Return_type_of_constructor_signature_must_be_assignable_to_the_instance_type_of_the_class);
+                        }
+                    }
+                    else if (func.type || isGetAccessorWithAnnotatedSetAccessor(func)) {
+                        if (ts.isAsyncFunctionLike(func)) {
+                            var promisedType = getPromisedType(returnType);
+                            var awaitedType = checkAwaitedType(exprType, node.expression || node, ts.Diagnostics.Return_expression_in_async_function_does_not_have_a_valid_callable_then_member);
+                            if (promisedType) {
+                                // If the function has a return type, but promisedType is
+                                // undefined, an error will be reported in checkAsyncFunctionReturnType
+                                // so we don't need to report one here.
+                                checkTypeAssignableTo(awaitedType, promisedType, node.expression || node);
+                            }
+                        }
+                        else {
+                            checkTypeAssignableTo(exprType, returnType, node.expression || node);
+                        }
+                    }
+                }
+                else if (func.kind !== 148 /* Constructor */ && compilerOptions.noImplicitReturns && !isUnwrappedReturnTypeVoidOrAny(func, returnType)) {
+                    // The function has a return type, but the return statement doesn't have an expression.
+                    error(node, ts.Diagnostics.Not_all_code_paths_return_a_value);
+                }
+            }
+        }
+        function checkWithStatement(node) {
+            // Grammar checking for withStatement
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.flags & 33554432 /* AwaitContext */) {
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.with_statements_are_not_allowed_in_an_async_function_block);
+                }
+            }
+            checkExpression(node.expression);
+            error(node.expression, ts.Diagnostics.All_symbols_within_a_with_block_will_be_resolved_to_any);
+        }
+        function checkSwitchStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            var firstDefaultClause;
+            var hasDuplicateDefaultClause = false;
+            var expressionType = checkExpression(node.expression);
+            ts.forEach(node.caseBlock.clauses, function (clause) {
+                // Grammar check for duplicate default clauses, skip if we already report duplicate default clause
+                if (clause.kind === 250 /* DefaultClause */ && !hasDuplicateDefaultClause) {
+                    if (firstDefaultClause === undefined) {
+                        firstDefaultClause = clause;
+                    }
+                    else {
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        var start = ts.skipTrivia(sourceFile.text, clause.pos);
+                        var end = clause.statements.length > 0 ? clause.statements[0].pos : clause.end;
+                        grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.A_default_clause_cannot_appear_more_than_once_in_a_switch_statement);
+                        hasDuplicateDefaultClause = true;
+                    }
+                }
+                if (produceDiagnostics && clause.kind === 249 /* CaseClause */) {
+                    var caseClause = clause;
+                    // TypeScript 1.0 spec (April 2014): 5.9
+                    // In a 'switch' statement, each 'case' expression must be of a type that is comparable
+                    // to or from the type of the 'switch' expression.
+                    var caseType = checkExpression(caseClause.expression);
+                    if (!isTypeEqualityComparableTo(expressionType, caseType)) {
+                        // expressionType is not comparable to caseType, try the reversed check and report errors if it fails
+                        checkTypeComparableTo(caseType, expressionType, caseClause.expression, /*headMessage*/ undefined);
+                    }
+                }
+                ts.forEach(clause.statements, checkSourceElement);
+            });
+        }
+        function checkLabeledStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                var current = node.parent;
+                while (current) {
+                    if (ts.isFunctionLike(current)) {
+                        break;
+                    }
+                    if (current.kind === 214 /* LabeledStatement */ && current.label.text === node.label.text) {
+                        var sourceFile = ts.getSourceFileOfNode(node);
+                        grammarErrorOnNode(node.label, ts.Diagnostics.Duplicate_label_0, ts.getTextOfNodeFromSourceText(sourceFile.text, node.label));
+                        break;
+                    }
+                    current = current.parent;
+                }
+            }
+            // ensure that label is unique
+            checkSourceElement(node.statement);
+        }
+        function checkThrowStatement(node) {
+            // Grammar checking
+            if (!checkGrammarStatementInAmbientContext(node)) {
+                if (node.expression === undefined) {
+                    grammarErrorAfterFirstToken(node, ts.Diagnostics.Line_break_not_permitted_here);
+                }
+            }
+            if (node.expression) {
+                checkExpression(node.expression);
+            }
+        }
+        function checkTryStatement(node) {
+            // Grammar checking
+            checkGrammarStatementInAmbientContext(node);
+            checkBlock(node.tryBlock);
+            var catchClause = node.catchClause;
+            if (catchClause) {
+                // Grammar checking
+                if (catchClause.variableDeclaration) {
+                    if (catchClause.variableDeclaration.name.kind !== 69 /* Identifier */) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.name, ts.Diagnostics.Catch_clause_variable_name_must_be_an_identifier);
+                    }
+                    else if (catchClause.variableDeclaration.type) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.type, ts.Diagnostics.Catch_clause_variable_cannot_have_a_type_annotation);
+                    }
+                    else if (catchClause.variableDeclaration.initializer) {
+                        grammarErrorOnFirstToken(catchClause.variableDeclaration.initializer, ts.Diagnostics.Catch_clause_variable_cannot_have_an_initializer);
+                    }
+                    else {
+                        var identifierName = catchClause.variableDeclaration.name.text;
+                        var locals = catchClause.block.locals;
+                        if (locals && ts.hasProperty(locals, identifierName)) {
+                            var localSymbol = locals[identifierName];
+                            if (localSymbol && (localSymbol.flags & 2 /* BlockScopedVariable */) !== 0) {
+                                grammarErrorOnNode(localSymbol.valueDeclaration, ts.Diagnostics.Cannot_redeclare_identifier_0_in_catch_clause, identifierName);
+                            }
+                        }
+                    }
+                }
+                checkBlock(catchClause.block);
+            }
+            if (node.finallyBlock) {
+                checkBlock(node.finallyBlock);
+            }
+        }
+        function checkIndexConstraints(type) {
+            var declaredNumberIndexer = getIndexDeclarationOfSymbol(type.symbol, 1 /* Number */);
+            var declaredStringIndexer = getIndexDeclarationOfSymbol(type.symbol, 0 /* String */);
+            var stringIndexType = getIndexTypeOfType(type, 0 /* String */);
+            var numberIndexType = getIndexTypeOfType(type, 1 /* Number */);
+            if (stringIndexType || numberIndexType) {
+                ts.forEach(getPropertiesOfObjectType(type), function (prop) {
+                    var propType = getTypeOfSymbol(prop);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
+                    checkIndexConstraintForProperty(prop, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+                });
+                if (type.flags & 1024 /* Class */ && ts.isClassLike(type.symbol.valueDeclaration)) {
+                    var classDeclaration = type.symbol.valueDeclaration;
+                    for (var _i = 0, _a = classDeclaration.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        // Only process instance properties with computed names here.
+                        // Static properties cannot be in conflict with indexers,
+                        // and properties with literal names were already checked.
+                        if (!(member.flags & 32 /* Static */) && ts.hasDynamicName(member)) {
+                            var propType = getTypeOfSymbol(member.symbol);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredStringIndexer, stringIndexType, 0 /* String */);
+                            checkIndexConstraintForProperty(member.symbol, propType, type, declaredNumberIndexer, numberIndexType, 1 /* Number */);
+                        }
+                    }
+                }
+            }
+            var errorNode;
+            if (stringIndexType && numberIndexType) {
+                errorNode = declaredNumberIndexer || declaredStringIndexer;
+                // condition 'errorNode === undefined' may appear if types does not declare nor string neither number indexer
+                if (!errorNode && (type.flags & 2048 /* Interface */)) {
+                    var someBaseTypeHasBothIndexers = ts.forEach(getBaseTypes(type), function (base) { return getIndexTypeOfType(base, 0 /* String */) && getIndexTypeOfType(base, 1 /* Number */); });
+                    errorNode = someBaseTypeHasBothIndexers ? undefined : type.symbol.declarations[0];
+                }
+            }
+            if (errorNode && !isTypeAssignableTo(numberIndexType, stringIndexType)) {
+                error(errorNode, ts.Diagnostics.Numeric_index_type_0_is_not_assignable_to_string_index_type_1, typeToString(numberIndexType), typeToString(stringIndexType));
+            }
+            function checkIndexConstraintForProperty(prop, propertyType, containingType, indexDeclaration, indexType, indexKind) {
+                if (!indexType) {
+                    return;
+                }
+                // index is numeric and property name is not valid numeric literal
+                if (indexKind === 1 /* Number */ && !isNumericName(prop.valueDeclaration.name)) {
+                    return;
+                }
+                // perform property check if property or indexer is declared in 'type'
+                // this allows to rule out cases when both property and indexer are inherited from the base class
+                var errorNode;
+                if (prop.valueDeclaration.name.kind === 140 /* ComputedPropertyName */ || prop.parent === containingType.symbol) {
+                    errorNode = prop.valueDeclaration;
+                }
+                else if (indexDeclaration) {
+                    errorNode = indexDeclaration;
+                }
+                else if (containingType.flags & 2048 /* Interface */) {
+                    // for interfaces property and indexer might be inherited from different bases
+                    // check if any base class already has both property and indexer.
+                    // check should be performed only if 'type' is the first type that brings property\indexer together
+                    var someBaseClassHasBothPropertyAndIndexer = ts.forEach(getBaseTypes(containingType), function (base) { return getPropertyOfObjectType(base, prop.name) && getIndexTypeOfType(base, indexKind); });
+                    errorNode = someBaseClassHasBothPropertyAndIndexer ? undefined : containingType.symbol.declarations[0];
+                }
+                if (errorNode && !isTypeAssignableTo(propertyType, indexType)) {
+                    var errorMessage = indexKind === 0 /* String */
+                        ? ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_string_index_type_2
+                        : ts.Diagnostics.Property_0_of_type_1_is_not_assignable_to_numeric_index_type_2;
+                    error(errorNode, errorMessage, symbolToString(prop), typeToString(propertyType), typeToString(indexType));
+                }
+            }
+        }
+        function checkTypeNameIsReserved(name, message) {
+            // TS 1.0 spec (April 2014): 3.6.1
+            // The predefined type keywords are reserved and cannot be used as names of user defined types.
+            switch (name.text) {
+                case "any":
+                case "number":
+                case "boolean":
+                case "string":
+                case "symbol":
+                case "void":
+                    error(name, message, name.text);
+            }
+        }
+        /** Check each type parameter and check that type parameters have no duplicate type parameter declarations */
+        function checkTypeParameters(typeParameterDeclarations) {
+            if (typeParameterDeclarations) {
+                for (var i = 0, n = typeParameterDeclarations.length; i < n; i++) {
+                    var node = typeParameterDeclarations[i];
+                    checkTypeParameter(node);
+                    if (produceDiagnostics) {
+                        for (var j = 0; j < i; j++) {
+                            if (typeParameterDeclarations[j].symbol === node.symbol) {
+                                error(node.name, ts.Diagnostics.Duplicate_identifier_0, ts.declarationNameToString(node.name));
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        /** Check that type parameter lists are identical across multiple declarations */
+        function checkTypeParameterListsIdentical(node, symbol) {
+            if (symbol.declarations.length === 1) {
+                return;
+            }
+            var firstDecl;
+            for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                var declaration = _a[_i];
+                if (declaration.kind === 221 /* ClassDeclaration */ || declaration.kind === 222 /* InterfaceDeclaration */) {
+                    if (!firstDecl) {
+                        firstDecl = declaration;
+                    }
+                    else if (!areTypeParametersIdentical(firstDecl.typeParameters, node.typeParameters)) {
+                        error(node.name, ts.Diagnostics.All_declarations_of_0_must_have_identical_type_parameters, node.name.text);
+                    }
+                }
+            }
+        }
+        function checkClassExpression(node) {
+            checkClassLikeDeclaration(node);
+            checkNodeDeferred(node);
+            return getTypeOfSymbol(getSymbolOfNode(node));
+        }
+        function checkClassExpressionDeferred(node) {
+            ts.forEach(node.members, checkSourceElement);
+        }
+        function checkClassDeclaration(node) {
+            if (!node.name && !(node.flags & 512 /* Default */)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.A_class_declaration_without_the_default_modifier_must_have_a_name);
+            }
+            checkClassLikeDeclaration(node);
+            ts.forEach(node.members, checkSourceElement);
+        }
+        function checkClassLikeDeclaration(node) {
+            checkGrammarClassDeclarationHeritageClauses(node);
+            checkDecorators(node);
+            if (node.name) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Class_name_cannot_be_0);
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            }
+            checkTypeParameters(node.typeParameters);
+            checkExportsOnMergedDeclarations(node);
+            var symbol = getSymbolOfNode(node);
+            var type = getDeclaredTypeOfSymbol(symbol);
+            var typeWithThis = getTypeWithThisArgument(type);
+            var staticType = getTypeOfSymbol(symbol);
+            checkTypeParameterListsIdentical(node, symbol);
+            checkClassForDuplicateDeclarations(node);
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            if (baseTypeNode) {
+                var baseTypes = getBaseTypes(type);
+                if (baseTypes.length && produceDiagnostics) {
+                    var baseType_1 = baseTypes[0];
+                    var staticBaseType = getBaseConstructorTypeOfClass(type);
+                    checkBaseTypeAccessibility(staticBaseType, baseTypeNode);
+                    checkSourceElement(baseTypeNode.expression);
+                    if (baseTypeNode.typeArguments) {
+                        ts.forEach(baseTypeNode.typeArguments, checkSourceElement);
+                        for (var _i = 0, _a = getConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments); _i < _a.length; _i++) {
+                            var constructor = _a[_i];
+                            if (!checkTypeArgumentConstraints(constructor.typeParameters, baseTypeNode.typeArguments)) {
+                                break;
+                            }
+                        }
+                    }
+                    checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType_1, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_extends_base_class_1);
+                    checkTypeAssignableTo(staticType, getTypeWithoutSignatures(staticBaseType), node.name || node, ts.Diagnostics.Class_static_side_0_incorrectly_extends_base_class_static_side_1);
+                    if (!(staticBaseType.symbol && staticBaseType.symbol.flags & 32 /* Class */)) {
+                        // When the static base type is a "class-like" constructor function (but not actually a class), we verify
+                        // that all instantiated base constructor signatures return the same type. We can simply compare the type
+                        // references (as opposed to checking the structure of the types) because elsewhere we have already checked
+                        // that the base type is a class or interface type (and not, for example, an anonymous object type).
+                        var constructors = getInstantiatedConstructorsForTypeArguments(staticBaseType, baseTypeNode.typeArguments);
+                        if (ts.forEach(constructors, function (sig) { return getReturnTypeOfSignature(sig) !== baseType_1; })) {
+                            error(baseTypeNode.expression, ts.Diagnostics.Base_constructors_must_all_have_the_same_return_type);
+                        }
+                    }
+                    checkKindsOfPropertyMemberOverrides(type, baseType_1);
+                }
+            }
+            var implementedTypeNodes = ts.getClassImplementsHeritageClauseElements(node);
+            if (implementedTypeNodes) {
+                for (var _b = 0, implementedTypeNodes_1 = implementedTypeNodes; _b < implementedTypeNodes_1.length; _b++) {
+                    var typeRefNode = implementedTypeNodes_1[_b];
+                    if (!ts.isSupportedExpressionWithTypeArguments(typeRefNode)) {
+                        error(typeRefNode.expression, ts.Diagnostics.A_class_can_only_implement_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                    }
+                    checkTypeReferenceNode(typeRefNode);
+                    if (produceDiagnostics) {
+                        var t = getTypeFromTypeNode(typeRefNode);
+                        if (t !== unknownType) {
+                            var declaredType = (t.flags & 4096 /* Reference */) ? t.target : t;
+                            if (declaredType.flags & (1024 /* Class */ | 2048 /* Interface */)) {
+                                checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(t, type.thisType), node.name || node, ts.Diagnostics.Class_0_incorrectly_implements_interface_1);
+                            }
+                            else {
+                                error(typeRefNode, ts.Diagnostics.A_class_may_only_implement_another_class_or_interface);
+                            }
+                        }
+                    }
+                }
+            }
+            if (produceDiagnostics) {
+                checkIndexConstraints(type);
+                checkTypeForDuplicateIndexSignatures(node);
+            }
+        }
+        function checkBaseTypeAccessibility(type, node) {
+            var signatures = getSignaturesOfType(type, 1 /* Construct */);
+            if (signatures.length) {
+                var declaration = signatures[0].declaration;
+                if (declaration && declaration.flags & 8 /* Private */) {
+                    var typeClassDeclaration = getClassLikeDeclarationOfSymbol(type.symbol);
+                    if (!isNodeWithinClass(node, typeClassDeclaration)) {
+                        error(node, ts.Diagnostics.Cannot_extend_a_class_0_Class_constructor_is_marked_as_private, node.expression.text);
+                    }
+                }
+            }
+        }
+        function getTargetSymbol(s) {
+            // if symbol is instantiated its flags are not copied from the 'target'
+            // so we'll need to get back original 'target' symbol to work with correct set of flags
+            return s.flags & 16777216 /* Instantiated */ ? getSymbolLinks(s).target : s;
+        }
+        function getClassLikeDeclarationOfSymbol(symbol) {
+            return ts.forEach(symbol.declarations, function (d) { return ts.isClassLike(d) ? d : undefined; });
+        }
+        function checkKindsOfPropertyMemberOverrides(type, baseType) {
+            // TypeScript 1.0 spec (April 2014): 8.2.3
+            // A derived class inherits all members from its base class it doesn't override.
+            // Inheritance means that a derived class implicitly contains all non - overridden members of the base class.
+            // Both public and private property members are inherited, but only public property members can be overridden.
+            // A property member in a derived class is said to override a property member in a base class
+            // when the derived class property member has the same name and kind(instance or static)
+            // as the base class property member.
+            // The type of an overriding property member must be assignable(section 3.8.4)
+            // to the type of the overridden property member, or otherwise a compile - time error occurs.
+            // Base class instance member functions can be overridden by derived class instance member functions,
+            // but not by other kinds of members.
+            // Base class instance member variables and accessors can be overridden by
+            // derived class instance member variables and accessors, but not by other kinds of members.
+            // NOTE: assignability is checked in checkClassDeclaration
+            var baseProperties = getPropertiesOfObjectType(baseType);
+            for (var _i = 0, baseProperties_1 = baseProperties; _i < baseProperties_1.length; _i++) {
+                var baseProperty = baseProperties_1[_i];
+                var base = getTargetSymbol(baseProperty);
+                if (base.flags & 134217728 /* Prototype */) {
+                    continue;
+                }
+                var derived = getTargetSymbol(getPropertyOfObjectType(type, base.name));
+                var baseDeclarationFlags = getDeclarationFlagsFromSymbol(base);
+                ts.Debug.assert(!!derived, "derived should point to something, even if it is the base class' declaration.");
+                if (derived) {
+                    // In order to resolve whether the inherited method was overridden in the base class or not,
+                    // we compare the Symbols obtained. Since getTargetSymbol returns the symbol on the *uninstantiated*
+                    // type declaration, derived and base resolve to the same symbol even in the case of generic classes.
+                    if (derived === base) {
+                        // derived class inherits base without override/redeclaration
+                        var derivedClassDecl = getClassLikeDeclarationOfSymbol(type.symbol);
+                        // It is an error to inherit an abstract member without implementing it or being declared abstract.
+                        // If there is no declaration for the derived class (as in the case of class expressions),
+                        // then the class cannot be declared abstract.
+                        if (baseDeclarationFlags & 128 /* Abstract */ && (!derivedClassDecl || !(derivedClassDecl.flags & 128 /* Abstract */))) {
+                            if (derivedClassDecl.kind === 192 /* ClassExpression */) {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_expression_does_not_implement_inherited_abstract_member_0_from_class_1, symbolToString(baseProperty), typeToString(baseType));
+                            }
+                            else {
+                                error(derivedClassDecl, ts.Diagnostics.Non_abstract_class_0_does_not_implement_inherited_abstract_member_1_from_class_2, typeToString(type), symbolToString(baseProperty), typeToString(baseType));
+                            }
+                        }
+                    }
+                    else {
+                        // derived overrides base.
+                        var derivedDeclarationFlags = getDeclarationFlagsFromSymbol(derived);
+                        if ((baseDeclarationFlags & 8 /* Private */) || (derivedDeclarationFlags & 8 /* Private */)) {
+                            // either base or derived property is private - not override, skip it
+                            continue;
+                        }
+                        if ((baseDeclarationFlags & 32 /* Static */) !== (derivedDeclarationFlags & 32 /* Static */)) {
+                            // value of 'static' is not the same for properties - not override, skip it
+                            continue;
+                        }
+                        if ((base.flags & derived.flags & 8192 /* Method */) || ((base.flags & 98308 /* PropertyOrAccessor */) && (derived.flags & 98308 /* PropertyOrAccessor */))) {
+                            // method is overridden with method or property/accessor is overridden with property/accessor - correct case
+                            continue;
+                        }
+                        var errorMessage = void 0;
+                        if (base.flags & 8192 /* Method */) {
+                            if (derived.flags & 98304 /* Accessor */) {
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_accessor;
+                            }
+                            else {
+                                ts.Debug.assert((derived.flags & 4 /* Property */) !== 0);
+                                errorMessage = ts.Diagnostics.Class_0_defines_instance_member_function_1_but_extended_class_2_defines_it_as_instance_member_property;
+                            }
+                        }
+                        else if (base.flags & 4 /* Property */) {
+                            ts.Debug.assert((derived.flags & 8192 /* Method */) !== 0);
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_property_1_but_extended_class_2_defines_it_as_instance_member_function;
+                        }
+                        else {
+                            ts.Debug.assert((base.flags & 98304 /* Accessor */) !== 0);
+                            ts.Debug.assert((derived.flags & 8192 /* Method */) !== 0);
+                            errorMessage = ts.Diagnostics.Class_0_defines_instance_member_accessor_1_but_extended_class_2_defines_it_as_instance_member_function;
+                        }
+                        error(derived.valueDeclaration.name, errorMessage, typeToString(baseType), symbolToString(base), typeToString(type));
+                    }
+                }
+            }
+        }
+        function isAccessor(kind) {
+            return kind === 149 /* GetAccessor */ || kind === 150 /* SetAccessor */;
+        }
+        function areTypeParametersIdentical(list1, list2) {
+            if (!list1 && !list2) {
+                return true;
+            }
+            if (!list1 || !list2 || list1.length !== list2.length) {
+                return false;
+            }
+            // TypeScript 1.0 spec (April 2014):
+            // When a generic interface has multiple declarations,  all declarations must have identical type parameter
+            // lists, i.e. identical type parameter names with identical constraints in identical order.
+            for (var i = 0, len = list1.length; i < len; i++) {
+                var tp1 = list1[i];
+                var tp2 = list2[i];
+                if (tp1.name.text !== tp2.name.text) {
+                    return false;
+                }
+                if (!tp1.constraint && !tp2.constraint) {
+                    continue;
+                }
+                if (!tp1.constraint || !tp2.constraint) {
+                    return false;
+                }
+                if (!isTypeIdenticalTo(getTypeFromTypeNode(tp1.constraint), getTypeFromTypeNode(tp2.constraint))) {
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkInheritedPropertiesAreIdentical(type, typeNode) {
+            var baseTypes = getBaseTypes(type);
+            if (baseTypes.length < 2) {
+                return true;
+            }
+            var seen = {};
+            ts.forEach(resolveDeclaredMembers(type).declaredProperties, function (p) { seen[p.name] = { prop: p, containingType: type }; });
+            var ok = true;
+            for (var _i = 0, baseTypes_2 = baseTypes; _i < baseTypes_2.length; _i++) {
+                var base = baseTypes_2[_i];
+                var properties = getPropertiesOfObjectType(getTypeWithThisArgument(base, type.thisType));
+                for (var _a = 0, properties_4 = properties; _a < properties_4.length; _a++) {
+                    var prop = properties_4[_a];
+                    if (!ts.hasProperty(seen, prop.name)) {
+                        seen[prop.name] = { prop: prop, containingType: base };
+                    }
+                    else {
+                        var existing = seen[prop.name];
+                        var isInheritedProperty = existing.containingType !== type;
+                        if (isInheritedProperty && !isPropertyIdenticalTo(existing.prop, prop)) {
+                            ok = false;
+                            var typeName1 = typeToString(existing.containingType);
+                            var typeName2 = typeToString(base);
+                            var errorInfo = ts.chainDiagnosticMessages(undefined, ts.Diagnostics.Named_property_0_of_types_1_and_2_are_not_identical, symbolToString(prop), typeName1, typeName2);
+                            errorInfo = ts.chainDiagnosticMessages(errorInfo, ts.Diagnostics.Interface_0_cannot_simultaneously_extend_types_1_and_2, typeToString(type), typeName1, typeName2);
+                            diagnostics.add(ts.createDiagnosticForNodeFromMessageChain(typeNode, errorInfo));
+                        }
+                    }
+                }
+            }
+            return ok;
+        }
+        function checkInterfaceDeclaration(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarInterfaceDeclaration(node);
+            checkTypeParameters(node.typeParameters);
+            if (produceDiagnostics) {
+                checkTypeNameIsReserved(node.name, ts.Diagnostics.Interface_name_cannot_be_0);
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                checkTypeParameterListsIdentical(node, symbol);
+                // Only check this symbol once
+                var firstInterfaceDecl = ts.getDeclarationOfKind(symbol, 222 /* InterfaceDeclaration */);
+                if (node === firstInterfaceDecl) {
+                    var type = getDeclaredTypeOfSymbol(symbol);
+                    var typeWithThis = getTypeWithThisArgument(type);
+                    // run subsequent checks only if first set succeeded
+                    if (checkInheritedPropertiesAreIdentical(type, node.name)) {
+                        for (var _i = 0, _a = getBaseTypes(type); _i < _a.length; _i++) {
+                            var baseType = _a[_i];
+                            checkTypeAssignableTo(typeWithThis, getTypeWithThisArgument(baseType, type.thisType), node.name, ts.Diagnostics.Interface_0_incorrectly_extends_interface_1);
+                        }
+                        checkIndexConstraints(type);
+                    }
+                }
+                checkObjectTypeForDuplicateDeclarations(node);
+            }
+            ts.forEach(ts.getInterfaceBaseTypeNodes(node), function (heritageElement) {
+                if (!ts.isSupportedExpressionWithTypeArguments(heritageElement)) {
+                    error(heritageElement.expression, ts.Diagnostics.An_interface_can_only_extend_an_identifier_Slashqualified_name_with_optional_type_arguments);
+                }
+                checkTypeReferenceNode(heritageElement);
+            });
+            ts.forEach(node.members, checkSourceElement);
+            if (produceDiagnostics) {
+                checkTypeForDuplicateIndexSignatures(node);
+            }
+        }
+        function checkTypeAliasDeclaration(node) {
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Type_alias_name_cannot_be_0);
+            checkSourceElement(node.type);
+        }
+        function computeEnumMemberValues(node) {
+            var nodeLinks = getNodeLinks(node);
+            if (!(nodeLinks.flags & 16384 /* EnumValuesComputed */)) {
+                var enumSymbol = getSymbolOfNode(node);
+                var enumType = getDeclaredTypeOfSymbol(enumSymbol);
+                var autoValue = 0; // set to undefined when enum member is non-constant
+                var ambient = ts.isInAmbientContext(node);
+                var enumIsConst = ts.isConst(node);
+                for (var _i = 0, _a = node.members; _i < _a.length; _i++) {
+                    var member = _a[_i];
+                    if (isComputedNonLiteralName(member.name)) {
+                        error(member.name, ts.Diagnostics.Computed_property_names_are_not_allowed_in_enums);
+                    }
+                    else {
+                        var text = getTextOfPropertyName(member.name);
+                        if (isNumericLiteralName(text)) {
+                            error(member.name, ts.Diagnostics.An_enum_member_cannot_have_a_numeric_name);
+                        }
+                    }
+                    var previousEnumMemberIsNonConstant = autoValue === undefined;
+                    var initializer = member.initializer;
+                    if (initializer) {
+                        autoValue = computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient);
+                    }
+                    else if (ambient && !enumIsConst) {
+                        // In ambient enum declarations that specify no const modifier, enum member declarations
+                        // that omit a value are considered computed members (as opposed to having auto-incremented values assigned).
+                        autoValue = undefined;
+                    }
+                    else if (previousEnumMemberIsNonConstant) {
+                        // If the member declaration specifies no value, the member is considered a constant enum member.
+                        // If the member is the first member in the enum declaration, it is assigned the value zero.
+                        // Otherwise, it is assigned the value of the immediately preceding member plus one,
+                        // and an error occurs if the immediately preceding member is not a constant enum member
+                        error(member.name, ts.Diagnostics.Enum_member_must_have_initializer);
+                    }
+                    if (autoValue !== undefined) {
+                        getNodeLinks(member).enumMemberValue = autoValue;
+                        autoValue++;
+                    }
+                }
+                nodeLinks.flags |= 16384 /* EnumValuesComputed */;
+            }
+            function computeConstantValueForEnumMemberInitializer(initializer, enumType, enumIsConst, ambient) {
+                // Controls if error should be reported after evaluation of constant value is completed
+                // Can be false if another more precise error was already reported during evaluation.
+                var reportError = true;
+                var value = evalConstant(initializer);
+                if (reportError) {
+                    if (value === undefined) {
+                        if (enumIsConst) {
+                            error(initializer, ts.Diagnostics.In_const_enum_declarations_member_initializer_must_be_constant_expression);
+                        }
+                        else if (ambient) {
+                            error(initializer, ts.Diagnostics.In_ambient_enum_declarations_member_initializer_must_be_constant_expression);
+                        }
+                        else {
+                            // Only here do we need to check that the initializer is assignable to the enum type.
+                            checkTypeAssignableTo(checkExpression(initializer), enumType, initializer, /*headMessage*/ undefined);
+                        }
+                    }
+                    else if (enumIsConst) {
+                        if (isNaN(value)) {
+                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_disallowed_value_NaN);
+                        }
+                        else if (!isFinite(value)) {
+                            error(initializer, ts.Diagnostics.const_enum_member_initializer_was_evaluated_to_a_non_finite_value);
+                        }
+                    }
+                }
+                return value;
+                function evalConstant(e) {
+                    switch (e.kind) {
+                        case 185 /* PrefixUnaryExpression */:
+                            var value_1 = evalConstant(e.operand);
+                            if (value_1 === undefined) {
+                                return undefined;
+                            }
+                            switch (e.operator) {
+                                case 35 /* PlusToken */: return value_1;
+                                case 36 /* MinusToken */: return -value_1;
+                                case 50 /* TildeToken */: return ~value_1;
+                            }
+                            return undefined;
+                        case 187 /* BinaryExpression */:
+                            var left = evalConstant(e.left);
+                            if (left === undefined) {
+                                return undefined;
+                            }
+                            var right = evalConstant(e.right);
+                            if (right === undefined) {
+                                return undefined;
+                            }
+                            switch (e.operatorToken.kind) {
+                                case 47 /* BarToken */: return left | right;
+                                case 46 /* AmpersandToken */: return left & right;
+                                case 44 /* GreaterThanGreaterThanToken */: return left >> right;
+                                case 45 /* GreaterThanGreaterThanGreaterThanToken */: return left >>> right;
+                                case 43 /* LessThanLessThanToken */: return left << right;
+                                case 48 /* CaretToken */: return left ^ right;
+                                case 37 /* AsteriskToken */: return left * right;
+                                case 39 /* SlashToken */: return left / right;
+                                case 35 /* PlusToken */: return left + right;
+                                case 36 /* MinusToken */: return left - right;
+                                case 40 /* PercentToken */: return left % right;
+                            }
+                            return undefined;
+                        case 8 /* NumericLiteral */:
+                            return +e.text;
+                        case 178 /* ParenthesizedExpression */:
+                            return evalConstant(e.expression);
+                        case 69 /* Identifier */:
+                        case 173 /* ElementAccessExpression */:
+                        case 172 /* PropertyAccessExpression */:
+                            var member = initializer.parent;
+                            var currentType = getTypeOfSymbol(getSymbolOfNode(member.parent));
+                            var enumType_1;
+                            var propertyName = void 0;
+                            if (e.kind === 69 /* Identifier */) {
+                                // unqualified names can refer to member that reside in different declaration of the enum so just doing name resolution won't work.
+                                // instead pick current enum type and later try to fetch member from the type
+                                enumType_1 = currentType;
+                                propertyName = e.text;
+                            }
+                            else {
+                                var expression = void 0;
+                                if (e.kind === 173 /* ElementAccessExpression */) {
+                                    if (e.argumentExpression === undefined ||
+                                        e.argumentExpression.kind !== 9 /* StringLiteral */) {
+                                        return undefined;
+                                    }
+                                    expression = e.expression;
+                                    propertyName = e.argumentExpression.text;
+                                }
+                                else {
+                                    expression = e.expression;
+                                    propertyName = e.name.text;
+                                }
+                                // expression part in ElementAccess\PropertyAccess should be either identifier or dottedName
+                                var current = expression;
+                                while (current) {
+                                    if (current.kind === 69 /* Identifier */) {
+                                        break;
+                                    }
+                                    else if (current.kind === 172 /* PropertyAccessExpression */) {
+                                        current = current.expression;
+                                    }
+                                    else {
+                                        return undefined;
+                                    }
+                                }
+                                enumType_1 = checkExpression(expression);
+                                // allow references to constant members of other enums
+                                if (!(enumType_1.symbol && (enumType_1.symbol.flags & 384 /* Enum */))) {
+                                    return undefined;
+                                }
+                            }
+                            if (propertyName === undefined) {
+                                return undefined;
+                            }
+                            var property = getPropertyOfObjectType(enumType_1, propertyName);
+                            if (!property || !(property.flags & 8 /* EnumMember */)) {
+                                return undefined;
+                            }
+                            var propertyDecl = property.valueDeclaration;
+                            // self references are illegal
+                            if (member === propertyDecl) {
+                                return undefined;
+                            }
+                            // illegal case: forward reference
+                            if (!isBlockScopedNameDeclaredBeforeUse(propertyDecl, member)) {
+                                reportError = false;
+                                error(e, ts.Diagnostics.A_member_initializer_in_a_enum_declaration_cannot_reference_members_declared_after_it_including_members_defined_in_other_enums);
+                                return undefined;
+                            }
+                            return getNodeLinks(propertyDecl).enumMemberValue;
+                    }
+                }
+            }
+        }
+        function checkEnumDeclaration(node) {
+            if (!produceDiagnostics) {
+                return;
+            }
+            // Grammar checking
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            checkTypeNameIsReserved(node.name, ts.Diagnostics.Enum_name_cannot_be_0);
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkExportsOnMergedDeclarations(node);
+            computeEnumMemberValues(node);
+            var enumIsConst = ts.isConst(node);
+            if (compilerOptions.isolatedModules && enumIsConst && ts.isInAmbientContext(node)) {
+                error(node.name, ts.Diagnostics.Ambient_const_enums_are_not_allowed_when_the_isolatedModules_flag_is_provided);
+            }
+            // Spec 2014 - Section 9.3:
+            // It isn't possible for one enum declaration to continue the automatic numbering sequence of another,
+            // and when an enum type has multiple declarations, only one declaration is permitted to omit a value
+            // for the first member.
+            //
+            // Only perform this check once per symbol
+            var enumSymbol = getSymbolOfNode(node);
+            var firstDeclaration = ts.getDeclarationOfKind(enumSymbol, node.kind);
+            if (node === firstDeclaration) {
+                if (enumSymbol.declarations.length > 1) {
+                    // check that const is placed\omitted on all enum declarations
+                    ts.forEach(enumSymbol.declarations, function (decl) {
+                        if (ts.isConstEnumDeclaration(decl) !== enumIsConst) {
+                            error(decl.name, ts.Diagnostics.Enum_declarations_must_all_be_const_or_non_const);
+                        }
+                    });
+                }
+                var seenEnumMissingInitialInitializer_1 = false;
+                ts.forEach(enumSymbol.declarations, function (declaration) {
+                    // return true if we hit a violation of the rule, false otherwise
+                    if (declaration.kind !== 224 /* EnumDeclaration */) {
+                        return false;
+                    }
+                    var enumDeclaration = declaration;
+                    if (!enumDeclaration.members.length) {
+                        return false;
+                    }
+                    var firstEnumMember = enumDeclaration.members[0];
+                    if (!firstEnumMember.initializer) {
+                        if (seenEnumMissingInitialInitializer_1) {
+                            error(firstEnumMember.name, ts.Diagnostics.In_an_enum_with_multiple_declarations_only_one_declaration_can_omit_an_initializer_for_its_first_enum_element);
+                        }
+                        else {
+                            seenEnumMissingInitialInitializer_1 = true;
+                        }
+                    }
+                });
+            }
+        }
+        function getFirstNonAmbientClassOrFunctionDeclaration(symbol) {
+            var declarations = symbol.declarations;
+            for (var _i = 0, declarations_5 = declarations; _i < declarations_5.length; _i++) {
+                var declaration = declarations_5[_i];
+                if ((declaration.kind === 221 /* ClassDeclaration */ ||
+                    (declaration.kind === 220 /* FunctionDeclaration */ && ts.nodeIsPresent(declaration.body))) &&
+                    !ts.isInAmbientContext(declaration)) {
+                    return declaration;
+                }
+            }
+            return undefined;
+        }
+        function inSameLexicalScope(node1, node2) {
+            var container1 = ts.getEnclosingBlockScopeContainer(node1);
+            var container2 = ts.getEnclosingBlockScopeContainer(node2);
+            if (isGlobalSourceFile(container1)) {
+                return isGlobalSourceFile(container2);
+            }
+            else if (isGlobalSourceFile(container2)) {
+                return false;
+            }
+            else {
+                return container1 === container2;
+            }
+        }
+        function checkModuleDeclaration(node) {
+            if (produceDiagnostics) {
+                // Grammar checking
+                var isGlobalAugmentation = ts.isGlobalScopeAugmentation(node);
+                var inAmbientContext = ts.isInAmbientContext(node);
+                if (isGlobalAugmentation && !inAmbientContext) {
+                    error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_should_have_declare_modifier_unless_they_appear_in_already_ambient_context);
+                }
+                var isAmbientExternalModule = ts.isAmbientModule(node);
+                var contextErrorMessage = isAmbientExternalModule
+                    ? ts.Diagnostics.An_ambient_module_declaration_is_only_allowed_at_the_top_level_in_a_file
+                    : ts.Diagnostics.A_namespace_declaration_is_only_allowed_in_a_namespace_or_module;
+                if (checkGrammarModuleElementContext(node, contextErrorMessage)) {
+                    // If we hit a module declaration in an illegal context, just bail out to avoid cascading errors.
+                    return;
+                }
+                if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node)) {
+                    if (!inAmbientContext && node.name.kind === 9 /* StringLiteral */) {
+                        grammarErrorOnNode(node.name, ts.Diagnostics.Only_ambient_modules_can_use_quoted_names);
+                    }
+                }
+                checkCollisionWithCapturedThisVariable(node, node.name);
+                checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+                checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+                checkExportsOnMergedDeclarations(node);
+                var symbol = getSymbolOfNode(node);
+                // The following checks only apply on a non-ambient instantiated module declaration.
+                if (symbol.flags & 512 /* ValueModule */
+                    && symbol.declarations.length > 1
+                    && !inAmbientContext
+                    && ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules)) {
+                    var firstNonAmbientClassOrFunc = getFirstNonAmbientClassOrFunctionDeclaration(symbol);
+                    if (firstNonAmbientClassOrFunc) {
+                        if (ts.getSourceFileOfNode(node) !== ts.getSourceFileOfNode(firstNonAmbientClassOrFunc)) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_in_a_different_file_from_a_class_or_function_with_which_it_is_merged);
+                        }
+                        else if (node.pos < firstNonAmbientClassOrFunc.pos) {
+                            error(node.name, ts.Diagnostics.A_namespace_declaration_cannot_be_located_prior_to_a_class_or_function_with_which_it_is_merged);
+                        }
+                    }
+                    // if the module merges with a class declaration in the same lexical scope,
+                    // we need to track this to ensure the correct emit.
+                    var mergedClass = ts.getDeclarationOfKind(symbol, 221 /* ClassDeclaration */);
+                    if (mergedClass &&
+                        inSameLexicalScope(node, mergedClass)) {
+                        getNodeLinks(node).flags |= 32768 /* LexicalModuleMergesWithClass */;
+                    }
+                }
+                if (isAmbientExternalModule) {
+                    if (ts.isExternalModuleAugmentation(node)) {
+                        // body of the augmentation should be checked for consistency only if augmentation was applied to its target (either global scope or module)
+                        // otherwise we'll be swamped in cascading errors.
+                        // We can detect if augmentation was applied using following rules:
+                        // - augmentation for a global scope is always applied
+                        // - augmentation for some external module is applied if symbol for augmentation is merged (it was combined with target module).
+                        var checkBody = isGlobalAugmentation || (getSymbolOfNode(node).flags & 33554432 /* Merged */);
+                        if (checkBody) {
+                            // body of ambient external module is always a module block
+                            for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
+                                var statement = _a[_i];
+                                checkModuleAugmentationElement(statement, isGlobalAugmentation);
+                            }
+                        }
+                    }
+                    else if (isGlobalSourceFile(node.parent)) {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else if (ts.isExternalModuleNameRelative(node.name.text)) {
+                            error(node.name, ts.Diagnostics.Ambient_module_declaration_cannot_specify_relative_module_name);
+                        }
+                    }
+                    else {
+                        if (isGlobalAugmentation) {
+                            error(node.name, ts.Diagnostics.Augmentations_for_the_global_scope_can_only_be_directly_nested_in_external_modules_or_ambient_module_declarations);
+                        }
+                        else {
+                            // Node is not an augmentation and is not located on the script level.
+                            // This means that this is declaration of ambient module that is located in other module or namespace which is prohibited.
+                            error(node.name, ts.Diagnostics.Ambient_modules_cannot_be_nested_in_other_modules_or_namespaces);
+                        }
+                    }
+                }
+            }
+            checkSourceElement(node.body);
+        }
+        function checkModuleAugmentationElement(node, isGlobalAugmentation) {
+            switch (node.kind) {
+                case 200 /* VariableStatement */:
+                    // error each individual name in variable statement instead of marking the entire variable statement
+                    for (var _i = 0, _a = node.declarationList.declarations; _i < _a.length; _i++) {
+                        var decl = _a[_i];
+                        checkModuleAugmentationElement(decl, isGlobalAugmentation);
+                    }
+                    break;
+                case 235 /* ExportAssignment */:
+                case 236 /* ExportDeclaration */:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Exports_and_export_assignments_are_not_permitted_in_module_augmentations);
+                    break;
+                case 229 /* ImportEqualsDeclaration */:
+                case 230 /* ImportDeclaration */:
+                    grammarErrorOnFirstToken(node, ts.Diagnostics.Imports_are_not_permitted_in_module_augmentations_Consider_moving_them_to_the_enclosing_external_module);
+                    break;
+                case 169 /* BindingElement */:
+                case 218 /* VariableDeclaration */:
+                    var name_19 = node.name;
+                    if (ts.isBindingPattern(name_19)) {
+                        for (var _b = 0, _c = name_19.elements; _b < _c.length; _b++) {
+                            var el = _c[_b];
+                            // mark individual names in binding pattern
+                            checkModuleAugmentationElement(el, isGlobalAugmentation);
+                        }
+                        break;
+                    }
+                // fallthrough
+                case 221 /* ClassDeclaration */:
+                case 224 /* EnumDeclaration */:
+                case 220 /* FunctionDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 225 /* ModuleDeclaration */:
+                case 223 /* TypeAliasDeclaration */:
+                    if (isGlobalAugmentation) {
+                        return;
+                    }
+                    var symbol = getSymbolOfNode(node);
+                    if (symbol) {
+                        // module augmentations cannot introduce new names on the top level scope of the module
+                        // this is done it two steps
+                        // 1. quick check - if symbol for node is not merged - this is local symbol to this augmentation - report error
+                        // 2. main check - report error if value declaration of the parent symbol is module augmentation)
+                        var reportError = !(symbol.flags & 33554432 /* Merged */);
+                        if (!reportError) {
+                            // symbol should not originate in augmentation
+                            reportError = ts.isExternalModuleAugmentation(symbol.parent.declarations[0]);
+                        }
+                    }
+                    break;
+            }
+        }
+        function getFirstIdentifier(node) {
+            while (true) {
+                if (node.kind === 139 /* QualifiedName */) {
+                    node = node.left;
+                }
+                else if (node.kind === 172 /* PropertyAccessExpression */) {
+                    node = node.expression;
+                }
+                else {
+                    break;
+                }
+            }
+            ts.Debug.assert(node.kind === 69 /* Identifier */);
+            return node;
+        }
+        function checkExternalImportOrExportDeclaration(node) {
+            var moduleName = ts.getExternalModuleName(node);
+            if (!ts.nodeIsMissing(moduleName) && moduleName.kind !== 9 /* StringLiteral */) {
+                error(moduleName, ts.Diagnostics.String_literal_expected);
+                return false;
+            }
+            var inAmbientExternalModule = node.parent.kind === 226 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
+            if (node.parent.kind !== 256 /* SourceFile */ && !inAmbientExternalModule) {
+                error(moduleName, node.kind === 236 /* ExportDeclaration */ ?
+                    ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace :
+                    ts.Diagnostics.Import_declarations_in_a_namespace_cannot_reference_a_module);
+                return false;
+            }
+            if (inAmbientExternalModule && ts.isExternalModuleNameRelative(moduleName.text)) {
+                // we have already reported errors on top level imports\exports in external module augmentations in checkModuleDeclaration
+                // no need to do this again.
+                if (!isTopLevelInExternalModuleAugmentation(node)) {
+                    // TypeScript 1.0 spec (April 2013): 12.1.6
+                    // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference
+                    // other external modules only through top - level external module names.
+                    // Relative external module names are not permitted.
+                    error(node, ts.Diagnostics.Import_or_export_declaration_in_an_ambient_module_declaration_cannot_reference_module_through_relative_module_name);
+                    return false;
+                }
+            }
+            return true;
+        }
+        function checkAliasSymbol(node) {
+            var symbol = getSymbolOfNode(node);
+            var target = resolveAlias(symbol);
+            if (target !== unknownSymbol) {
+                // For external modules symbol represent local symbol for an alias.
+                // This local symbol will merge any other local declarations (excluding other aliases)
+                // and symbol.flags will contains combined representation for all merged declaration.
+                // Based on symbol.flags we can compute a set of excluded meanings (meaning that resolved alias should not have,
+                // otherwise it will conflict with some local declaration). Note that in addition to normal flags we include matching SymbolFlags.Export*
+                // in order to prevent collisions with declarations that were exported from the current module (they still contribute to local names).
+                var excludedMeanings = (symbol.flags & (107455 /* Value */ | 1048576 /* ExportValue */) ? 107455 /* Value */ : 0) |
+                    (symbol.flags & 793056 /* Type */ ? 793056 /* Type */ : 0) |
+                    (symbol.flags & 1536 /* Namespace */ ? 1536 /* Namespace */ : 0);
+                if (target.flags & excludedMeanings) {
+                    var message = node.kind === 238 /* ExportSpecifier */ ?
+                        ts.Diagnostics.Export_declaration_conflicts_with_exported_declaration_of_0 :
+                        ts.Diagnostics.Import_declaration_conflicts_with_local_declaration_of_0;
+                    error(node, message, symbolToString(symbol));
+                }
+            }
+        }
+        function checkImportBinding(node) {
+            checkCollisionWithCapturedThisVariable(node, node.name);
+            checkCollisionWithRequireExportsInGeneratedCode(node, node.name);
+            checkCollisionWithGlobalPromiseInGeneratedCode(node, node.name);
+            checkAliasSymbol(node);
+        }
+        function checkImportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023 /* Modifier */)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_import_declaration_cannot_have_modifiers);
+            }
+            if (checkExternalImportOrExportDeclaration(node)) {
+                var importClause = node.importClause;
+                if (importClause) {
+                    if (importClause.name) {
+                        checkImportBinding(importClause);
+                    }
+                    if (importClause.namedBindings) {
+                        if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                            checkImportBinding(importClause.namedBindings);
+                        }
+                        else {
+                            ts.forEach(importClause.namedBindings.elements, checkImportBinding);
+                        }
+                    }
+                }
+            }
+        }
+        function checkImportEqualsDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_import_declaration_can_only_be_used_in_a_namespace_or_module)) {
+                // If we hit an import declaration in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            checkGrammarDecorators(node) || checkGrammarModifiers(node);
+            if (ts.isInternalModuleImportEqualsDeclaration(node) || checkExternalImportOrExportDeclaration(node)) {
+                checkImportBinding(node);
+                if (node.flags & 1 /* Export */) {
+                    markExportAsReferenced(node);
+                }
+                if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                    var target = resolveAlias(getSymbolOfNode(node));
+                    if (target !== unknownSymbol) {
+                        if (target.flags & 107455 /* Value */) {
+                            // Target is a value symbol, check that it is not hidden by a local declaration with the same name
+                            var moduleName = getFirstIdentifier(node.moduleReference);
+                            if (!(resolveEntityName(moduleName, 107455 /* Value */ | 1536 /* Namespace */).flags & 1536 /* Namespace */)) {
+                                error(moduleName, ts.Diagnostics.Module_0_is_hidden_by_a_local_declaration_with_the_same_name, ts.declarationNameToString(moduleName));
+                            }
+                        }
+                        if (target.flags & 793056 /* Type */) {
+                            checkTypeNameIsReserved(node.name, ts.Diagnostics.Import_name_cannot_be_0);
+                        }
+                    }
+                }
+                else {
+                    if (modulekind === ts.ModuleKind.ES6 && !ts.isInAmbientContext(node)) {
+                        // Import equals declaration is deprecated in es6 or above
+                        grammarErrorOnNode(node, ts.Diagnostics.Import_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_import_Asterisk_as_ns_from_mod_import_a_from_mod_import_d_from_mod_or_another_module_format_instead);
+                    }
+                }
+            }
+        }
+        function checkExportDeclaration(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_declaration_can_only_be_used_in_a_module)) {
+                // If we hit an export in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023 /* Modifier */)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_declaration_cannot_have_modifiers);
+            }
+            if (!node.moduleSpecifier || checkExternalImportOrExportDeclaration(node)) {
+                if (node.exportClause) {
+                    // export { x, y }
+                    // export { x, y } from "foo"
+                    ts.forEach(node.exportClause.elements, checkExportSpecifier);
+                    var inAmbientExternalModule = node.parent.kind === 226 /* ModuleBlock */ && ts.isAmbientModule(node.parent.parent);
+                    if (node.parent.kind !== 256 /* SourceFile */ && !inAmbientExternalModule) {
+                        error(node, ts.Diagnostics.Export_declarations_are_not_permitted_in_a_namespace);
+                    }
+                }
+                else {
+                    // export * from "foo"
+                    var moduleSymbol = resolveExternalModuleName(node, node.moduleSpecifier);
+                    if (moduleSymbol && hasExportAssignmentSymbol(moduleSymbol)) {
+                        error(node.moduleSpecifier, ts.Diagnostics.Module_0_uses_export_and_cannot_be_used_with_export_Asterisk, symbolToString(moduleSymbol));
+                    }
+                }
+            }
+        }
+        function checkGrammarModuleElementContext(node, errorMessage) {
+            if (node.parent.kind !== 256 /* SourceFile */ && node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 225 /* ModuleDeclaration */) {
+                return grammarErrorOnFirstToken(node, errorMessage);
+            }
+        }
+        function checkExportSpecifier(node) {
+            checkAliasSymbol(node);
+            if (!node.parent.parent.moduleSpecifier) {
+                var exportedName = node.propertyName || node.name;
+                // find immediate value referenced by exported name (SymbolFlags.Alias is set so we don't chase down aliases)
+                var symbol = resolveName(exportedName, exportedName.text, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */, 
+                /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+                if (symbol && (symbol === undefinedSymbol || isGlobalSourceFile(getDeclarationContainer(symbol.declarations[0])))) {
+                    error(exportedName, ts.Diagnostics.Cannot_export_0_Only_local_declarations_can_be_exported_from_a_module, exportedName.text);
+                }
+                else {
+                    markExportAsReferenced(node);
+                }
+            }
+        }
+        function checkExportAssignment(node) {
+            if (checkGrammarModuleElementContext(node, ts.Diagnostics.An_export_assignment_can_only_be_used_in_a_module)) {
+                // If we hit an export assignment in an illegal context, just bail out to avoid cascading errors.
+                return;
+            }
+            var container = node.parent.kind === 256 /* SourceFile */ ? node.parent : node.parent.parent;
+            if (container.kind === 225 /* ModuleDeclaration */ && !ts.isAmbientModule(container)) {
+                error(node, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_namespace);
+                return;
+            }
+            // Grammar checking
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && (node.flags & 1023 /* Modifier */)) {
+                grammarErrorOnFirstToken(node, ts.Diagnostics.An_export_assignment_cannot_have_modifiers);
+            }
+            if (node.expression.kind === 69 /* Identifier */) {
+                markExportAsReferenced(node);
+            }
+            else {
+                checkExpressionCached(node.expression);
+            }
+            checkExternalModuleExports(container);
+            if (node.isExportEquals && !ts.isInAmbientContext(node)) {
+                if (modulekind === ts.ModuleKind.ES6) {
+                    // export assignment is not supported in es6 modules
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_cannot_be_used_when_targeting_ECMAScript_2015_modules_Consider_using_export_default_or_another_module_format_instead);
+                }
+                else if (modulekind === ts.ModuleKind.System) {
+                    // system modules does not support export assignment
+                    grammarErrorOnNode(node, ts.Diagnostics.Export_assignment_is_not_supported_when_module_flag_is_system);
+                }
+            }
+        }
+        function hasExportedMembers(moduleSymbol) {
+            for (var id in moduleSymbol.exports) {
+                if (id !== "export=") {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function checkExternalModuleExports(node) {
+            var moduleSymbol = getSymbolOfNode(node);
+            var links = getSymbolLinks(moduleSymbol);
+            if (!links.exportsChecked) {
+                var exportEqualsSymbol = moduleSymbol.exports["export="];
+                if (exportEqualsSymbol && hasExportedMembers(moduleSymbol)) {
+                    var declaration = getDeclarationOfAliasSymbol(exportEqualsSymbol) || exportEqualsSymbol.valueDeclaration;
+                    if (!isTopLevelInExternalModuleAugmentation(declaration)) {
+                        error(declaration, ts.Diagnostics.An_export_assignment_cannot_be_used_in_a_module_with_other_exported_elements);
+                    }
+                }
+                // Checks for export * conflicts
+                var exports = getExportsOfModule(moduleSymbol);
+                for (var id in exports) {
+                    if (id === "__export") {
+                        continue;
+                    }
+                    var _a = exports[id], declarations = _a.declarations, flags = _a.flags;
+                    // ECMA262: 15.2.1.1 It is a Syntax Error if the ExportedNames of ModuleItemList contains any duplicate entries.
+                    // (TS Exceptions: namespaces, function overloads, enums, and interfaces)
+                    if (flags & (1536 /* Namespace */ | 64 /* Interface */ | 384 /* Enum */)) {
+                        continue;
+                    }
+                    var exportedDeclarationsCount = ts.countWhere(declarations, isNotOverload);
+                    if (flags & 524288 /* TypeAlias */ && exportedDeclarationsCount <= 2) {
+                        // it is legal to merge type alias with other values
+                        // so count should be either 1 (just type alias) or 2 (type alias + merged value)
+                        continue;
+                    }
+                    if (exportedDeclarationsCount > 1) {
+                        for (var _i = 0, declarations_6 = declarations; _i < declarations_6.length; _i++) {
+                            var declaration = declarations_6[_i];
+                            if (isNotOverload(declaration)) {
+                                diagnostics.add(ts.createDiagnosticForNode(declaration, ts.Diagnostics.Cannot_redeclare_exported_variable_0, id));
+                            }
+                        }
+                    }
+                }
+                links.exportsChecked = true;
+            }
+            function isNotOverload(declaration) {
+                return declaration.kind !== 220 /* FunctionDeclaration */ || !!declaration.body;
+            }
+        }
+        function checkSourceElement(node) {
+            if (!node) {
+                return;
+            }
+            var kind = node.kind;
+            if (cancellationToken) {
+                // Only bother checking on a few construct kinds.  We don't want to be excessively
+                // hitting the cancellation token on every node we check.
+                switch (kind) {
+                    case 225 /* ModuleDeclaration */:
+                    case 221 /* ClassDeclaration */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 220 /* FunctionDeclaration */:
+                        cancellationToken.throwIfCancellationRequested();
+                }
+            }
+            switch (kind) {
+                case 141 /* TypeParameter */:
+                    return checkTypeParameter(node);
+                case 142 /* Parameter */:
+                    return checkParameter(node);
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                    return checkPropertyDeclaration(node);
+                case 156 /* FunctionType */:
+                case 157 /* ConstructorType */:
+                case 151 /* CallSignature */:
+                case 152 /* ConstructSignature */:
+                    return checkSignatureDeclaration(node);
+                case 153 /* IndexSignature */:
+                    return checkSignatureDeclaration(node);
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                    return checkMethodDeclaration(node);
+                case 148 /* Constructor */:
+                    return checkConstructorDeclaration(node);
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                    return checkAccessorDeclaration(node);
+                case 155 /* TypeReference */:
+                    return checkTypeReferenceNode(node);
+                case 154 /* TypePredicate */:
+                    return checkTypePredicate(node);
+                case 158 /* TypeQuery */:
+                    return checkTypeQuery(node);
+                case 159 /* TypeLiteral */:
+                    return checkTypeLiteral(node);
+                case 160 /* ArrayType */:
+                    return checkArrayType(node);
+                case 161 /* TupleType */:
+                    return checkTupleType(node);
+                case 162 /* UnionType */:
+                case 163 /* IntersectionType */:
+                    return checkUnionOrIntersectionType(node);
+                case 164 /* ParenthesizedType */:
+                    return checkSourceElement(node.type);
+                case 220 /* FunctionDeclaration */:
+                    return checkFunctionDeclaration(node);
+                case 199 /* Block */:
+                case 226 /* ModuleBlock */:
+                    return checkBlock(node);
+                case 200 /* VariableStatement */:
+                    return checkVariableStatement(node);
+                case 202 /* ExpressionStatement */:
+                    return checkExpressionStatement(node);
+                case 203 /* IfStatement */:
+                    return checkIfStatement(node);
+                case 204 /* DoStatement */:
+                    return checkDoStatement(node);
+                case 205 /* WhileStatement */:
+                    return checkWhileStatement(node);
+                case 206 /* ForStatement */:
+                    return checkForStatement(node);
+                case 207 /* ForInStatement */:
+                    return checkForInStatement(node);
+                case 208 /* ForOfStatement */:
+                    return checkForOfStatement(node);
+                case 209 /* ContinueStatement */:
+                case 210 /* BreakStatement */:
+                    return checkBreakOrContinueStatement(node);
+                case 211 /* ReturnStatement */:
+                    return checkReturnStatement(node);
+                case 212 /* WithStatement */:
+                    return checkWithStatement(node);
+                case 213 /* SwitchStatement */:
+                    return checkSwitchStatement(node);
+                case 214 /* LabeledStatement */:
+                    return checkLabeledStatement(node);
+                case 215 /* ThrowStatement */:
+                    return checkThrowStatement(node);
+                case 216 /* TryStatement */:
+                    return checkTryStatement(node);
+                case 218 /* VariableDeclaration */:
+                    return checkVariableDeclaration(node);
+                case 169 /* BindingElement */:
+                    return checkBindingElement(node);
+                case 221 /* ClassDeclaration */:
+                    return checkClassDeclaration(node);
+                case 222 /* InterfaceDeclaration */:
+                    return checkInterfaceDeclaration(node);
+                case 223 /* TypeAliasDeclaration */:
+                    return checkTypeAliasDeclaration(node);
+                case 224 /* EnumDeclaration */:
+                    return checkEnumDeclaration(node);
+                case 225 /* ModuleDeclaration */:
+                    return checkModuleDeclaration(node);
+                case 230 /* ImportDeclaration */:
+                    return checkImportDeclaration(node);
+                case 229 /* ImportEqualsDeclaration */:
+                    return checkImportEqualsDeclaration(node);
+                case 236 /* ExportDeclaration */:
+                    return checkExportDeclaration(node);
+                case 235 /* ExportAssignment */:
+                    return checkExportAssignment(node);
+                case 201 /* EmptyStatement */:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 217 /* DebuggerStatement */:
+                    checkGrammarStatementInAmbientContext(node);
+                    return;
+                case 239 /* MissingDeclaration */:
+                    return checkMissingDeclaration(node);
+            }
+        }
+        // Function and class expression bodies are checked after all statements in the enclosing body. This is
+        // to ensure constructs like the following are permitted:
+        //     const foo = function () {
+        //        const s = foo();
+        //        return "hello";
+        //     }
+        // Here, performing a full type check of the body of the function expression whilst in the process of
+        // determining the type of foo would cause foo to be given type any because of the recursive reference.
+        // Delaying the type check of the body ensures foo has been assigned a type.
+        function checkNodeDeferred(node) {
+            if (deferredNodes) {
+                deferredNodes.push(node);
+            }
+        }
+        function checkDeferredNodes() {
+            for (var _i = 0, deferredNodes_1 = deferredNodes; _i < deferredNodes_1.length; _i++) {
+                var node = deferredNodes_1[_i];
+                switch (node.kind) {
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        checkFunctionExpressionOrObjectLiteralMethodDeferred(node);
+                        break;
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        checkAccessorDeferred(node);
+                        break;
+                    case 192 /* ClassExpression */:
+                        checkClassExpressionDeferred(node);
+                        break;
+                }
+            }
+        }
+        function checkSourceFile(node) {
+            var start = new Date().getTime();
+            checkSourceFileWorker(node);
+            ts.checkTime += new Date().getTime() - start;
+        }
+        // Fully type check a source file and collect the relevant diagnostics.
+        function checkSourceFileWorker(node) {
+            var links = getNodeLinks(node);
+            if (!(links.flags & 1 /* TypeChecked */)) {
+                // If skipLibCheck is enabled, skip type checking if file is a declaration file.
+                // If skipDefaultLibCheck is enabled, skip type checking if file contains a
+                // '/// <reference no-default-lib="true"/>' directive.
+                if (compilerOptions.skipLibCheck && node.isDeclarationFile || compilerOptions.skipDefaultLibCheck && node.hasNoDefaultLib) {
+                    return;
+                }
+                // Grammar checking
+                checkGrammarSourceFile(node);
+                potentialThisCollisions.length = 0;
+                deferredNodes = [];
+                ts.forEach(node.statements, checkSourceElement);
+                checkDeferredNodes();
+                deferredNodes = undefined;
+                if (ts.isExternalOrCommonJsModule(node)) {
+                    checkExternalModuleExports(node);
+                }
+                if (potentialThisCollisions.length) {
+                    ts.forEach(potentialThisCollisions, checkIfThisIsCapturedInEnclosingScope);
+                    potentialThisCollisions.length = 0;
+                }
+                links.flags |= 1 /* TypeChecked */;
+            }
+        }
+        function getDiagnostics(sourceFile, ct) {
+            try {
+                // Record the cancellation token so it can be checked later on during checkSourceElement.
+                // Do this in a finally block so we can ensure that it gets reset back to nothing after
+                // this call is done.
+                cancellationToken = ct;
+                return getDiagnosticsWorker(sourceFile);
+            }
+            finally {
+                cancellationToken = undefined;
+            }
+        }
+        function getDiagnosticsWorker(sourceFile) {
+            throwIfNonDiagnosticsProducing();
+            if (sourceFile) {
+                checkSourceFile(sourceFile);
+                return diagnostics.getDiagnostics(sourceFile.fileName);
+            }
+            ts.forEach(host.getSourceFiles(), checkSourceFile);
+            return diagnostics.getDiagnostics();
+        }
+        function getGlobalDiagnostics() {
+            throwIfNonDiagnosticsProducing();
+            return diagnostics.getGlobalDiagnostics();
+        }
+        function throwIfNonDiagnosticsProducing() {
+            if (!produceDiagnostics) {
+                throw new Error("Trying to get diagnostics from a type checker that does not produce them.");
+            }
+        }
+        // Language service support
+        function isInsideWithStatementBody(node) {
+            if (node) {
+                while (node.parent) {
+                    if (node.parent.kind === 212 /* WithStatement */ && node.parent.statement === node) {
+                        return true;
+                    }
+                    node = node.parent;
+                }
+            }
+            return false;
+        }
+        function getSymbolsInScope(location, meaning) {
+            var symbols = {};
+            var memberFlags = 0;
+            if (isInsideWithStatementBody(location)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return [];
+            }
+            populateSymbols();
+            return symbolsToArray(symbols);
+            function populateSymbols() {
+                while (location) {
+                    if (location.locals && !isGlobalSourceFile(location)) {
+                        copySymbols(location.locals, meaning);
+                    }
+                    switch (location.kind) {
+                        case 256 /* SourceFile */:
+                            if (!ts.isExternalOrCommonJsModule(location)) {
+                                break;
+                            }
+                        case 225 /* ModuleDeclaration */:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8914931 /* ModuleMember */);
+                            break;
+                        case 224 /* EnumDeclaration */:
+                            copySymbols(getSymbolOfNode(location).exports, meaning & 8 /* EnumMember */);
+                            break;
+                        case 192 /* ClassExpression */:
+                            var className = location.name;
+                            if (className) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                        // fall through; this fall-through is necessary because we would like to handle
+                        // type parameter inside class expression similar to how we handle it in classDeclaration and interface Declaration
+                        case 221 /* ClassDeclaration */:
+                        case 222 /* InterfaceDeclaration */:
+                            // If we didn't come from static member of class or interface,
+                            // add the type parameters into the symbol table
+                            // (type parameters of classDeclaration/classExpression and interface are in member property of the symbol.
+                            // Note: that the memberFlags come from previous iteration.
+                            if (!(memberFlags & 32 /* Static */)) {
+                                copySymbols(getSymbolOfNode(location).members, meaning & 793056 /* Type */);
+                            }
+                            break;
+                        case 179 /* FunctionExpression */:
+                            var funcName = location.name;
+                            if (funcName) {
+                                copySymbol(location.symbol, meaning);
+                            }
+                            break;
+                    }
+                    if (ts.introducesArgumentsExoticObject(location)) {
+                        copySymbol(argumentsSymbol, meaning);
+                    }
+                    memberFlags = location.flags;
+                    location = location.parent;
+                }
+                copySymbols(globals, meaning);
+            }
+            /**
+             * Copy the given symbol into symbol tables if the symbol has the given meaning
+             * and it doesn't already existed in the symbol table
+             * @param key a key for storing in symbol table; if undefined, use symbol.name
+             * @param symbol the symbol to be added into symbol table
+             * @param meaning meaning of symbol to filter by before adding to symbol table
+             */
+            function copySymbol(symbol, meaning) {
+                if (symbol.flags & meaning) {
+                    var id = symbol.name;
+                    // We will copy all symbol regardless of its reserved name because
+                    // symbolsToArray will check whether the key is a reserved name and
+                    // it will not copy symbol with reserved name to the array
+                    if (!ts.hasProperty(symbols, id)) {
+                        symbols[id] = symbol;
+                    }
+                }
+            }
+            function copySymbols(source, meaning) {
+                if (meaning) {
+                    for (var id in source) {
+                        var symbol = source[id];
+                        copySymbol(symbol, meaning);
+                    }
+                }
+            }
+        }
+        function isTypeDeclarationName(name) {
+            return name.kind === 69 /* Identifier */ &&
+                isTypeDeclaration(name.parent) &&
+                name.parent.name === name;
+        }
+        function isTypeDeclaration(node) {
+            switch (node.kind) {
+                case 141 /* TypeParameter */:
+                case 221 /* ClassDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 223 /* TypeAliasDeclaration */:
+                case 224 /* EnumDeclaration */:
+                    return true;
+            }
+        }
+        // True if the given identifier is part of a type reference
+        function isTypeReferenceIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 139 /* QualifiedName */) {
+                node = node.parent;
+            }
+            return node.parent && (node.parent.kind === 155 /* TypeReference */ || node.parent.kind === 267 /* JSDocTypeReference */);
+        }
+        function isHeritageClauseElementIdentifier(entityName) {
+            var node = entityName;
+            while (node.parent && node.parent.kind === 172 /* PropertyAccessExpression */) {
+                node = node.parent;
+            }
+            return node.parent && node.parent.kind === 194 /* ExpressionWithTypeArguments */;
+        }
+        function forEachEnclosingClass(node, callback) {
+            var result;
+            while (true) {
+                node = ts.getContainingClass(node);
+                if (!node)
+                    break;
+                if (result = callback(node))
+                    break;
+            }
+            return result;
+        }
+        function isNodeWithinClass(node, classDeclaration) {
+            return !!forEachEnclosingClass(node, function (n) { return n === classDeclaration; });
+        }
+        function getLeftSideOfImportEqualsOrExportAssignment(nodeOnRightSide) {
+            while (nodeOnRightSide.parent.kind === 139 /* QualifiedName */) {
+                nodeOnRightSide = nodeOnRightSide.parent;
+            }
+            if (nodeOnRightSide.parent.kind === 229 /* ImportEqualsDeclaration */) {
+                return nodeOnRightSide.parent.moduleReference === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            if (nodeOnRightSide.parent.kind === 235 /* ExportAssignment */) {
+                return nodeOnRightSide.parent.expression === nodeOnRightSide && nodeOnRightSide.parent;
+            }
+            return undefined;
+        }
+        function isInRightSideOfImportOrExportAssignment(node) {
+            return getLeftSideOfImportEqualsOrExportAssignment(node) !== undefined;
+        }
+        function getSymbolOfEntityNameOrPropertyAccessExpression(entityName) {
+            if (ts.isDeclarationName(entityName)) {
+                return getSymbolOfNode(entityName.parent);
+            }
+            if (ts.isInJavaScriptFile(entityName) && entityName.parent.kind === 172 /* PropertyAccessExpression */) {
+                var specialPropertyAssignmentKind = ts.getSpecialPropertyAssignmentKind(entityName.parent.parent);
+                switch (specialPropertyAssignmentKind) {
+                    case 1 /* ExportsProperty */:
+                    case 3 /* PrototypeProperty */:
+                        return getSymbolOfNode(entityName.parent);
+                    case 4 /* ThisProperty */:
+                    case 2 /* ModuleExports */:
+                        return getSymbolOfNode(entityName.parent.parent);
+                    default:
+                }
+            }
+            if (entityName.parent.kind === 235 /* ExportAssignment */) {
+                return resolveEntityName(entityName, 
+                /*all meanings*/ 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */);
+            }
+            if (entityName.kind !== 172 /* PropertyAccessExpression */) {
+                if (isInRightSideOfImportOrExportAssignment(entityName)) {
+                    // Since we already checked for ExportAssignment, this really could only be an Import
+                    var importEqualsDeclaration = ts.getAncestor(entityName, 229 /* ImportEqualsDeclaration */);
+                    ts.Debug.assert(importEqualsDeclaration !== undefined);
+                    return getSymbolOfPartOfRightHandSideOfImportEquals(entityName, importEqualsDeclaration, /*dontResolveAlias*/ true);
+                }
+            }
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(entityName)) {
+                entityName = entityName.parent;
+            }
+            if (isHeritageClauseElementIdentifier(entityName)) {
+                var meaning = 0 /* None */;
+                // In an interface or class, we're definitely interested in a type.
+                if (entityName.parent.kind === 194 /* ExpressionWithTypeArguments */) {
+                    meaning = 793056 /* Type */;
+                    // In a class 'extends' clause we are also looking for a value.
+                    if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(entityName.parent)) {
+                        meaning |= 107455 /* Value */;
+                    }
+                }
+                else {
+                    meaning = 1536 /* Namespace */;
+                }
+                meaning |= 8388608 /* Alias */;
+                return resolveEntityName(entityName, meaning);
+            }
+            else if (ts.isExpression(entityName)) {
+                if (ts.nodeIsMissing(entityName)) {
+                    // Missing entity name.
+                    return undefined;
+                }
+                if (entityName.kind === 69 /* Identifier */) {
+                    if (ts.isJSXTagName(entityName) && isJsxIntrinsicIdentifier(entityName)) {
+                        return getIntrinsicTagSymbol(entityName.parent);
+                    }
+                    return resolveEntityName(entityName, 107455 /* Value */, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
+                }
+                else if (entityName.kind === 172 /* PropertyAccessExpression */) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkPropertyAccessExpression(entityName);
+                    }
+                    return getNodeLinks(entityName).resolvedSymbol;
+                }
+                else if (entityName.kind === 139 /* QualifiedName */) {
+                    var symbol = getNodeLinks(entityName).resolvedSymbol;
+                    if (!symbol) {
+                        checkQualifiedName(entityName);
+                    }
+                    return getNodeLinks(entityName).resolvedSymbol;
+                }
+            }
+            else if (isTypeReferenceIdentifier(entityName)) {
+                var meaning = (entityName.parent.kind === 155 /* TypeReference */ || entityName.parent.kind === 267 /* JSDocTypeReference */) ? 793056 /* Type */ : 1536 /* Namespace */;
+                return resolveEntityName(entityName, meaning, /*ignoreErrors*/ false, /*dontResolveAlias*/ true);
+            }
+            else if (entityName.parent.kind === 246 /* JsxAttribute */) {
+                return getJsxAttributePropertySymbol(entityName.parent);
+            }
+            if (entityName.parent.kind === 154 /* TypePredicate */) {
+                return resolveEntityName(entityName, /*meaning*/ 1 /* FunctionScopedVariable */);
+            }
+            // Do we want to return undefined here?
+            return undefined;
+        }
+        function getSymbolAtLocation(node) {
+            if (node.kind === 256 /* SourceFile */) {
+                return ts.isExternalModule(node) ? getMergedSymbol(node.symbol) : undefined;
+            }
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return undefined;
+            }
+            if (ts.isDeclarationName(node)) {
+                // This is a declaration, call getSymbolOfNode
+                return getSymbolOfNode(node.parent);
+            }
+            else if (ts.isLiteralComputedPropertyDeclarationName(node)) {
+                return getSymbolOfNode(node.parent.parent);
+            }
+            if (node.kind === 69 /* Identifier */) {
+                if (isInRightSideOfImportOrExportAssignment(node)) {
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                }
+                else if (node.parent.kind === 169 /* BindingElement */ &&
+                    node.parent.parent.kind === 167 /* ObjectBindingPattern */ &&
+                    node === node.parent.propertyName) {
+                    var typeOfPattern = getTypeOfNode(node.parent.parent);
+                    var propertyDeclaration = typeOfPattern && getPropertyOfType(typeOfPattern, node.text);
+                    if (propertyDeclaration) {
+                        return propertyDeclaration;
+                    }
+                }
+            }
+            switch (node.kind) {
+                case 69 /* Identifier */:
+                case 172 /* PropertyAccessExpression */:
+                case 139 /* QualifiedName */:
+                    return getSymbolOfEntityNameOrPropertyAccessExpression(node);
+                case 97 /* ThisKeyword */:
+                case 95 /* SuperKeyword */:
+                    var type = ts.isExpression(node) ? checkExpression(node) : getTypeFromTypeNode(node);
+                    return type.symbol;
+                case 165 /* ThisType */:
+                    return getTypeFromTypeNode(node).symbol;
+                case 121 /* ConstructorKeyword */:
+                    // constructor keyword for an overload, should take us to the definition if it exist
+                    var constructorDeclaration = node.parent;
+                    if (constructorDeclaration && constructorDeclaration.kind === 148 /* Constructor */) {
+                        return constructorDeclaration.parent.symbol;
+                    }
+                    return undefined;
+                case 9 /* StringLiteral */:
+                    // External module name in an import declaration
+                    if ((ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) &&
+                        ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node) ||
+                        ((node.parent.kind === 230 /* ImportDeclaration */ || node.parent.kind === 236 /* ExportDeclaration */) &&
+                            node.parent.moduleSpecifier === node)) {
+                        return resolveExternalModuleName(node, node);
+                    }
+                // Fall through
+                case 8 /* NumericLiteral */:
+                    // index access
+                    if (node.parent.kind === 173 /* ElementAccessExpression */ && node.parent.argumentExpression === node) {
+                        var objectType = checkExpression(node.parent.expression);
+                        if (objectType === unknownType)
+                            return undefined;
+                        var apparentType = getApparentType(objectType);
+                        if (apparentType === unknownType)
+                            return undefined;
+                        return getPropertyOfType(apparentType, node.text);
+                    }
+                    break;
+            }
+            return undefined;
+        }
+        function getShorthandAssignmentValueSymbol(location) {
+            // The function returns a value symbol of an identifier in the short-hand property assignment.
+            // This is necessary as an identifier in short-hand property assignment can contains two meaning:
+            // property name and property value.
+            if (location && location.kind === 254 /* ShorthandPropertyAssignment */) {
+                return resolveEntityName(location.name, 107455 /* Value */ | 8388608 /* Alias */);
+            }
+            return undefined;
+        }
+        /** Returns the target of an export specifier without following aliases */
+        function getExportSpecifierLocalTargetSymbol(node) {
+            return node.parent.parent.moduleSpecifier ?
+                getExternalModuleMember(node.parent.parent, node) :
+                resolveEntityName(node.propertyName || node.name, 107455 /* Value */ | 793056 /* Type */ | 1536 /* Namespace */ | 8388608 /* Alias */);
+        }
+        function getTypeOfNode(node) {
+            if (isInsideWithStatementBody(node)) {
+                // We cannot answer semantic questions within a with block, do not proceed any further
+                return unknownType;
+            }
+            if (ts.isTypeNode(node)) {
+                return getTypeFromTypeNode(node);
+            }
+            if (ts.isExpression(node)) {
+                return getTypeOfExpression(node);
+            }
+            if (ts.isExpressionWithTypeArgumentsInClassExtendsClause(node)) {
+                // A SyntaxKind.ExpressionWithTypeArguments is considered a type node, except when it occurs in the
+                // extends clause of a class. We handle that case here.
+                return getBaseTypes(getDeclaredTypeOfSymbol(getSymbolOfNode(node.parent.parent)))[0];
+            }
+            if (isTypeDeclaration(node)) {
+                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
+                var symbol = getSymbolOfNode(node);
+                return getDeclaredTypeOfSymbol(symbol);
+            }
+            if (isTypeDeclarationName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getDeclaredTypeOfSymbol(symbol);
+            }
+            if (ts.isDeclaration(node)) {
+                // In this case, we call getSymbolOfNode instead of getSymbolAtLocation because it is a declaration
+                var symbol = getSymbolOfNode(node);
+                return getTypeOfSymbol(symbol);
+            }
+            if (ts.isDeclarationName(node)) {
+                var symbol = getSymbolAtLocation(node);
+                return symbol && getTypeOfSymbol(symbol);
+            }
+            if (ts.isBindingPattern(node)) {
+                return getTypeForVariableLikeDeclaration(node.parent, /*includeOptionality*/ true);
+            }
+            if (isInRightSideOfImportOrExportAssignment(node)) {
+                var symbol = getSymbolAtLocation(node);
+                var declaredType = symbol && getDeclaredTypeOfSymbol(symbol);
+                return declaredType !== unknownType ? declaredType : getTypeOfSymbol(symbol);
+            }
+            return unknownType;
+        }
+        // Gets the type of object literal or array literal of destructuring assignment.
+        // { a } from
+        //     for ( { a } of elems) {
+        //     }
+        // [ a ] from
+        //     [a] = [ some array ...]
+        function getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr) {
+            ts.Debug.assert(expr.kind === 171 /* ObjectLiteralExpression */ || expr.kind === 170 /* ArrayLiteralExpression */);
+            // If this is from "for of"
+            //     for ( { a } of elems) {
+            //     }
+            if (expr.parent.kind === 208 /* ForOfStatement */) {
+                var iteratedType = checkRightHandSideOfForOf(expr.parent.expression);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
+            }
+            // If this is from "for" initializer
+            //     for ({a } = elems[0];.....) { }
+            if (expr.parent.kind === 187 /* BinaryExpression */) {
+                var iteratedType = checkExpression(expr.parent.right);
+                return checkDestructuringAssignment(expr, iteratedType || unknownType);
+            }
+            // If this is from nested object binding pattern
+            //     for ({ skills: { primary, secondary } } = multiRobot, i = 0; i < 1; i++) {
+            if (expr.parent.kind === 253 /* PropertyAssignment */) {
+                var typeOfParentObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent.parent);
+                return checkObjectLiteralDestructuringPropertyAssignment(typeOfParentObjectLiteral || unknownType, expr.parent);
+            }
+            // Array literal assignment - array destructuring pattern
+            ts.Debug.assert(expr.parent.kind === 170 /* ArrayLiteralExpression */);
+            //    [{ property1: p1, property2 }] = elems;
+            var typeOfArrayLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(expr.parent);
+            var elementType = checkIteratedTypeOrElementType(typeOfArrayLiteral || unknownType, expr.parent, /*allowStringInput*/ false) || unknownType;
+            return checkArrayLiteralDestructuringElementAssignment(expr.parent, typeOfArrayLiteral, ts.indexOf(expr.parent.elements, expr), elementType || unknownType);
+        }
+        // Gets the property symbol corresponding to the property in destructuring assignment
+        // 'property1' from
+        //     for ( { property1: a } of elems) {
+        //     }
+        // 'property1' at location 'a' from:
+        //     [a] = [ property1, property2 ]
+        function getPropertySymbolOfDestructuringAssignment(location) {
+            // Get the type of the object or array literal and then look for property of given name in the type
+            var typeOfObjectLiteral = getTypeOfArrayLiteralOrObjectLiteralDestructuringAssignment(location.parent.parent);
+            return typeOfObjectLiteral && getPropertyOfType(typeOfObjectLiteral, location.text);
+        }
+        function getTypeOfExpression(expr) {
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(expr)) {
+                expr = expr.parent;
+            }
+            return checkExpression(expr);
+        }
+        /**
+          * Gets either the static or instance type of a class element, based on
+          * whether the element is declared as "static".
+          */
+        function getParentTypeOfClassElement(node) {
+            var classSymbol = getSymbolOfNode(node.parent);
+            return node.flags & 32 /* Static */
+                ? getTypeOfSymbol(classSymbol)
+                : getDeclaredTypeOfSymbol(classSymbol);
+        }
+        // Return the list of properties of the given type, augmented with properties from Function
+        // if the type has call or construct signatures
+        function getAugmentedPropertiesOfType(type) {
+            type = getApparentType(type);
+            var propsByName = createSymbolTable(getPropertiesOfType(type));
+            if (getSignaturesOfType(type, 0 /* Call */).length || getSignaturesOfType(type, 1 /* Construct */).length) {
+                ts.forEach(getPropertiesOfType(globalFunctionType), function (p) {
+                    if (!ts.hasProperty(propsByName, p.name)) {
+                        propsByName[p.name] = p;
+                    }
+                });
+            }
+            return getNamedMembers(propsByName);
+        }
+        function getRootSymbols(symbol) {
+            if (symbol.flags & 268435456 /* SyntheticProperty */) {
+                var symbols_3 = [];
+                var name_20 = symbol.name;
+                ts.forEach(getSymbolLinks(symbol).containingType.types, function (t) {
+                    var symbol = getPropertyOfType(t, name_20);
+                    if (symbol) {
+                        symbols_3.push(symbol);
+                    }
+                });
+                return symbols_3;
+            }
+            else if (symbol.flags & 67108864 /* Transient */) {
+                var target = void 0;
+                var next = symbol;
+                while (next = getSymbolLinks(next).target) {
+                    target = next;
+                }
+                if (target) {
+                    return [target];
+                }
+            }
+            return [symbol];
+        }
+        // Emitter support
+        function isArgumentsLocalBinding(node) {
+            return getReferencedValueSymbol(node) === argumentsSymbol;
+        }
+        function moduleExportsSomeValue(moduleReferenceExpression) {
+            var moduleSymbol = resolveExternalModuleName(moduleReferenceExpression.parent, moduleReferenceExpression);
+            if (!moduleSymbol) {
+                // module not found - be conservative
+                return true;
+            }
+            var hasExportAssignment = hasExportAssignmentSymbol(moduleSymbol);
+            // if module has export assignment then 'resolveExternalModuleSymbol' will return resolved symbol for export assignment
+            // otherwise it will return moduleSymbol itself
+            moduleSymbol = resolveExternalModuleSymbol(moduleSymbol);
+            var symbolLinks = getSymbolLinks(moduleSymbol);
+            if (symbolLinks.exportsSomeValue === undefined) {
+                // for export assignments - check if resolved symbol for RHS is itself a value
+                // otherwise - check if at least one export is value
+                symbolLinks.exportsSomeValue = hasExportAssignment
+                    ? !!(moduleSymbol.flags & 107455 /* Value */)
+                    : ts.forEachValue(getExportsOfModule(moduleSymbol), isValue);
+            }
+            return symbolLinks.exportsSomeValue;
+            function isValue(s) {
+                s = resolveSymbol(s);
+                return s && !!(s.flags & 107455 /* Value */);
+            }
+        }
+        // When resolved as an expression identifier, if the given node references an exported entity, return the declaration
+        // node of the exported entity's container. Otherwise, return undefined.
+        function getReferencedExportContainer(node) {
+            var symbol = getReferencedValueSymbol(node);
+            if (symbol) {
+                if (symbol.flags & 1048576 /* ExportValue */) {
+                    // If we reference an exported entity within the same module declaration, then whether
+                    // we prefix depends on the kind of entity. SymbolFlags.ExportHasLocal encompasses all the
+                    // kinds that we do NOT prefix.
+                    var exportSymbol = getMergedSymbol(symbol.exportSymbol);
+                    if (exportSymbol.flags & 944 /* ExportHasLocal */) {
+                        return undefined;
+                    }
+                    symbol = exportSymbol;
+                }
+                var parentSymbol = getParentOfSymbol(symbol);
+                if (parentSymbol) {
+                    if (parentSymbol.flags & 512 /* ValueModule */ && parentSymbol.valueDeclaration.kind === 256 /* SourceFile */) {
+                        return parentSymbol.valueDeclaration;
+                    }
+                    for (var n = node.parent; n; n = n.parent) {
+                        if ((n.kind === 225 /* ModuleDeclaration */ || n.kind === 224 /* EnumDeclaration */) && getSymbolOfNode(n) === parentSymbol) {
+                            return n;
+                        }
+                    }
+                }
+            }
+        }
+        // When resolved as an expression identifier, if the given node references an import, return the declaration of
+        // that import. Otherwise, return undefined.
+        function getReferencedImportDeclaration(node) {
+            var symbol = getReferencedValueSymbol(node);
+            return symbol && symbol.flags & 8388608 /* Alias */ ? getDeclarationOfAliasSymbol(symbol) : undefined;
+        }
+        function isSymbolOfDeclarationWithCollidingName(symbol) {
+            if (symbol.flags & 418 /* BlockScoped */) {
+                var links = getSymbolLinks(symbol);
+                if (links.isDeclarationWithCollidingName === undefined) {
+                    var container = ts.getEnclosingBlockScopeContainer(symbol.valueDeclaration);
+                    if (ts.isStatementWithLocals(container)) {
+                        var nodeLinks_1 = getNodeLinks(symbol.valueDeclaration);
+                        if (!!resolveName(container.parent, symbol.name, 107455 /* Value */, /*nameNotFoundMessage*/ undefined, /*nameArg*/ undefined)) {
+                            // redeclaration - always should be renamed
+                            links.isDeclarationWithCollidingName = true;
+                        }
+                        else if (nodeLinks_1.flags & 131072 /* CapturedBlockScopedBinding */) {
+                            // binding is captured in the function
+                            // should be renamed if:
+                            // - binding is not top level - top level bindings never collide with anything
+                            // AND
+                            //   - binding is not declared in loop, should be renamed to avoid name reuse across siblings
+                            //     let a, b
+                            //     { let x = 1; a = () => x;  }
+                            //     { let x = 100; b = () => x; }
+                            //     console.log(a()); // should print '1'
+                            //     console.log(b()); // should print '100'
+                            //     OR
+                            //   - binding is declared inside loop but not in inside initializer of iteration statement or directly inside loop body
+                            //     * variables from initializer are passed to rewritten loop body as parameters so they are not captured directly
+                            //     * variables that are declared immediately in loop body will become top level variable after loop is rewritten and thus
+                            //       they will not collide with anything
+                            var isDeclaredInLoop = nodeLinks_1.flags & 262144 /* BlockScopedBindingInLoop */;
+                            var inLoopInitializer = ts.isIterationStatement(container, /*lookInLabeledStatements*/ false);
+                            var inLoopBodyBlock = container.kind === 199 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false);
+                            links.isDeclarationWithCollidingName = !ts.isBlockScopedContainerTopLevel(container) && (!isDeclaredInLoop || (!inLoopInitializer && !inLoopBodyBlock));
+                        }
+                        else {
+                            links.isDeclarationWithCollidingName = false;
+                        }
+                    }
+                }
+                return links.isDeclarationWithCollidingName;
+            }
+            return false;
+        }
+        // When resolved as an expression identifier, if the given node references a nested block scoped entity with
+        // a name that either hides an existing name or might hide it when compiled downlevel,
+        // return the declaration of that entity. Otherwise, return undefined.
+        function getReferencedDeclarationWithCollidingName(node) {
+            var symbol = getReferencedValueSymbol(node);
+            return symbol && isSymbolOfDeclarationWithCollidingName(symbol) ? symbol.valueDeclaration : undefined;
+        }
+        // Return true if the given node is a declaration of a nested block scoped entity with a name that either hides an
+        // existing name or might hide a name when compiled downlevel
+        function isDeclarationWithCollidingName(node) {
+            return isSymbolOfDeclarationWithCollidingName(getSymbolOfNode(node));
+        }
+        function isValueAliasDeclaration(node) {
+            switch (node.kind) {
+                case 229 /* ImportEqualsDeclaration */:
+                case 231 /* ImportClause */:
+                case 232 /* NamespaceImport */:
+                case 234 /* ImportSpecifier */:
+                case 238 /* ExportSpecifier */:
+                    return isAliasResolvedToValue(getSymbolOfNode(node));
+                case 236 /* ExportDeclaration */:
+                    var exportClause = node.exportClause;
+                    return exportClause && ts.forEach(exportClause.elements, isValueAliasDeclaration);
+                case 235 /* ExportAssignment */:
+                    return node.expression && node.expression.kind === 69 /* Identifier */ ? isAliasResolvedToValue(getSymbolOfNode(node)) : true;
+            }
+            return false;
+        }
+        function isTopLevelValueImportEqualsWithEntityName(node) {
+            if (node.parent.kind !== 256 /* SourceFile */ || !ts.isInternalModuleImportEqualsDeclaration(node)) {
+                // parent is not source file or it is not reference to internal module
+                return false;
+            }
+            var isValue = isAliasResolvedToValue(getSymbolOfNode(node));
+            return isValue && node.moduleReference && !ts.nodeIsMissing(node.moduleReference);
+        }
+        function isAliasResolvedToValue(symbol) {
+            var target = resolveAlias(symbol);
+            if (target === unknownSymbol) {
+                return true;
+            }
+            // const enums and modules that contain only const enums are not considered values from the emit perspective
+            // unless 'preserveConstEnums' option is set to true
+            return target.flags & 107455 /* Value */ &&
+                (compilerOptions.preserveConstEnums || !isConstEnumOrConstEnumOnlyModule(target));
+        }
+        function isConstEnumOrConstEnumOnlyModule(s) {
+            return isConstEnumSymbol(s) || s.constEnumOnlyModule;
+        }
+        function isReferencedAliasDeclaration(node, checkChildren) {
+            if (ts.isAliasSymbolDeclaration(node)) {
+                var symbol = getSymbolOfNode(node);
+                if (getSymbolLinks(symbol).referenced) {
+                    return true;
+                }
+            }
+            if (checkChildren) {
+                return ts.forEachChild(node, function (node) { return isReferencedAliasDeclaration(node, checkChildren); });
+            }
+            return false;
+        }
+        function isImplementationOfOverload(node) {
+            if (ts.nodeIsPresent(node.body)) {
+                var symbol = getSymbolOfNode(node);
+                var signaturesOfSymbol = getSignaturesOfSymbol(symbol);
+                // If this function body corresponds to function with multiple signature, it is implementation of overload
+                // e.g.: function foo(a: string): string;
+                //       function foo(a: number): number;
+                //       function foo(a: any) { // This is implementation of the overloads
+                //           return a;
+                //       }
+                return signaturesOfSymbol.length > 1 ||
+                    // If there is single signature for the symbol, it is overload if that signature isn't coming from the node
+                    // e.g.: function foo(a: string): string;
+                    //       function foo(a: any) { // This is implementation of the overloads
+                    //           return a;
+                    //       }
+                    (signaturesOfSymbol.length === 1 && signaturesOfSymbol[0].declaration !== node);
+            }
+            return false;
+        }
+        function getNodeCheckFlags(node) {
+            return getNodeLinks(node).flags;
+        }
+        function getEnumMemberValue(node) {
+            computeEnumMemberValues(node.parent);
+            return getNodeLinks(node).enumMemberValue;
+        }
+        function getConstantValue(node) {
+            if (node.kind === 255 /* EnumMember */) {
+                return getEnumMemberValue(node);
+            }
+            var symbol = getNodeLinks(node).resolvedSymbol;
+            if (symbol && (symbol.flags & 8 /* EnumMember */)) {
+                // inline property\index accesses only for const enums
+                if (ts.isConstEnumDeclaration(symbol.valueDeclaration.parent)) {
+                    return getEnumMemberValue(symbol.valueDeclaration);
+                }
+            }
+            return undefined;
+        }
+        function isFunctionType(type) {
+            return type.flags & 80896 /* ObjectType */ && getSignaturesOfType(type, 0 /* Call */).length > 0;
+        }
+        function getTypeReferenceSerializationKind(typeName) {
+            // Resolve the symbol as a value to ensure the type can be reached at runtime during emit.
+            var valueSymbol = resolveEntityName(typeName, 107455 /* Value */, /*ignoreErrors*/ true);
+            var constructorType = valueSymbol ? getTypeOfSymbol(valueSymbol) : undefined;
+            if (constructorType && isConstructorType(constructorType)) {
+                return ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue;
+            }
+            // Resolve the symbol as a type so that we can provide a more useful hint for the type serializer.
+            var typeSymbol = resolveEntityName(typeName, 793056 /* Type */, /*ignoreErrors*/ true);
+            // We might not be able to resolve type symbol so use unknown type in that case (eg error case)
+            if (!typeSymbol) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+            var type = getDeclaredTypeOfSymbol(typeSymbol);
+            if (type === unknownType) {
+                return ts.TypeReferenceSerializationKind.Unknown;
+            }
+            else if (type.flags & 1 /* Any */) {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+            else if (isTypeOfKind(type, 16 /* Void */)) {
+                return ts.TypeReferenceSerializationKind.VoidType;
+            }
+            else if (isTypeOfKind(type, 8 /* Boolean */)) {
+                return ts.TypeReferenceSerializationKind.BooleanType;
+            }
+            else if (isTypeOfKind(type, 132 /* NumberLike */)) {
+                return ts.TypeReferenceSerializationKind.NumberLikeType;
+            }
+            else if (isTypeOfKind(type, 258 /* StringLike */)) {
+                return ts.TypeReferenceSerializationKind.StringLikeType;
+            }
+            else if (isTypeOfKind(type, 8192 /* Tuple */)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            }
+            else if (isTypeOfKind(type, 16777216 /* ESSymbol */)) {
+                return ts.TypeReferenceSerializationKind.ESSymbolType;
+            }
+            else if (isFunctionType(type)) {
+                return ts.TypeReferenceSerializationKind.TypeWithCallSignature;
+            }
+            else if (isArrayType(type)) {
+                return ts.TypeReferenceSerializationKind.ArrayLikeType;
+            }
+            else {
+                return ts.TypeReferenceSerializationKind.ObjectType;
+            }
+        }
+        function writeTypeOfDeclaration(declaration, enclosingDeclaration, flags, writer) {
+            // Get type of the symbol if this is the valid symbol otherwise get type at location
+            var symbol = getSymbolOfNode(declaration);
+            var type = symbol && !(symbol.flags & (2048 /* TypeLiteral */ | 131072 /* Signature */))
+                ? getTypeOfSymbol(symbol)
+                : unknownType;
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        }
+        function writeReturnTypeOfSignatureDeclaration(signatureDeclaration, enclosingDeclaration, flags, writer) {
+            var signature = getSignatureFromDeclaration(signatureDeclaration);
+            getSymbolDisplayBuilder().buildTypeDisplay(getReturnTypeOfSignature(signature), writer, enclosingDeclaration, flags);
+        }
+        function writeTypeOfExpression(expr, enclosingDeclaration, flags, writer) {
+            var type = getWidenedType(getTypeOfExpression(expr));
+            getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        }
+        function writeBaseConstructorTypeOfClass(node, enclosingDeclaration, flags, writer) {
+            var classType = getDeclaredTypeOfSymbol(getSymbolOfNode(node));
+            resolveBaseTypesOfClass(classType);
+            var baseType = classType.resolvedBaseTypes.length ? classType.resolvedBaseTypes[0] : unknownType;
+            getSymbolDisplayBuilder().buildTypeDisplay(baseType, writer, enclosingDeclaration, flags);
+        }
+        function hasGlobalName(name) {
+            return ts.hasProperty(globals, name);
+        }
+        function getReferencedValueSymbol(reference) {
+            return getNodeLinks(reference).resolvedSymbol ||
+                resolveName(reference, reference.text, 107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */, 
+                /*nodeNotFoundMessage*/ undefined, /*nameArg*/ undefined);
+        }
+        function getReferencedValueDeclaration(reference) {
+            ts.Debug.assert(!ts.nodeIsSynthesized(reference));
+            var symbol = getReferencedValueSymbol(reference);
+            return symbol && getExportSymbolOfValueSymbolIfExported(symbol).valueDeclaration;
+        }
+        function createResolver() {
+            // this variable and functions that use it are deliberately moved here from the outer scope
+            // to avoid scope pollution
+            var resolvedTypeReferenceDirectives = host.getResolvedTypeReferenceDirectives();
+            var fileToDirective;
+            if (resolvedTypeReferenceDirectives) {
+                // populate reverse mapping: file path -> type reference directive that was resolved to this file
+                fileToDirective = ts.createFileMap();
+                for (var key in resolvedTypeReferenceDirectives) {
+                    if (!ts.hasProperty(resolvedTypeReferenceDirectives, key)) {
+                        continue;
+                    }
+                    var resolvedDirective = resolvedTypeReferenceDirectives[key];
+                    if (!resolvedDirective) {
+                        continue;
+                    }
+                    var file = host.getSourceFile(resolvedDirective.resolvedFileName);
+                    fileToDirective.set(file.path, key);
+                }
+            }
+            return {
+                getReferencedExportContainer: getReferencedExportContainer,
+                getReferencedImportDeclaration: getReferencedImportDeclaration,
+                getReferencedDeclarationWithCollidingName: getReferencedDeclarationWithCollidingName,
+                isDeclarationWithCollidingName: isDeclarationWithCollidingName,
+                isValueAliasDeclaration: isValueAliasDeclaration,
+                hasGlobalName: hasGlobalName,
+                isReferencedAliasDeclaration: isReferencedAliasDeclaration,
+                getNodeCheckFlags: getNodeCheckFlags,
+                isTopLevelValueImportEqualsWithEntityName: isTopLevelValueImportEqualsWithEntityName,
+                isDeclarationVisible: isDeclarationVisible,
+                isImplementationOfOverload: isImplementationOfOverload,
+                writeTypeOfDeclaration: writeTypeOfDeclaration,
+                writeReturnTypeOfSignatureDeclaration: writeReturnTypeOfSignatureDeclaration,
+                writeTypeOfExpression: writeTypeOfExpression,
+                writeBaseConstructorTypeOfClass: writeBaseConstructorTypeOfClass,
+                isSymbolAccessible: isSymbolAccessible,
+                isEntityNameVisible: isEntityNameVisible,
+                getConstantValue: getConstantValue,
+                collectLinkedAliases: collectLinkedAliases,
+                getReferencedValueDeclaration: getReferencedValueDeclaration,
+                getTypeReferenceSerializationKind: getTypeReferenceSerializationKind,
+                isOptionalParameter: isOptionalParameter,
+                moduleExportsSomeValue: moduleExportsSomeValue,
+                isArgumentsLocalBinding: isArgumentsLocalBinding,
+                getExternalModuleFileFromDeclaration: getExternalModuleFileFromDeclaration,
+                getTypeReferenceDirectivesForEntityName: getTypeReferenceDirectivesForEntityName,
+                getTypeReferenceDirectivesForSymbol: getTypeReferenceDirectivesForSymbol
+            };
+            // defined here to avoid outer scope pollution
+            function getTypeReferenceDirectivesForEntityName(node) {
+                // program does not have any files with type reference directives - bail out
+                if (!fileToDirective) {
+                    return undefined;
+                }
+                // property access can only be used as values
+                // qualified names can only be used as types\namespaces
+                // identifiers are treated as values only if they appear in type queries
+                var meaning = (node.kind === 172 /* PropertyAccessExpression */) || (node.kind === 69 /* Identifier */ && isInTypeQuery(node))
+                    ? 107455 /* Value */ | 1048576 /* ExportValue */
+                    : 793056 /* Type */ | 1536 /* Namespace */;
+                var symbol = resolveEntityName(node, meaning, /*ignoreErrors*/ true);
+                return symbol && symbol !== unknownSymbol ? getTypeReferenceDirectivesForSymbol(symbol, meaning) : undefined;
+            }
+            // defined here to avoid outer scope pollution
+            function getTypeReferenceDirectivesForSymbol(symbol, meaning) {
+                // program does not have any files with type reference directives - bail out
+                if (!fileToDirective) {
+                    return undefined;
+                }
+                if (!isSymbolFromTypeDeclarationFile(symbol)) {
+                    return undefined;
+                }
+                // check what declarations in the symbol can contribute to the target meaning
+                var typeReferenceDirectives;
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    // check meaning of the local symbol to see if declaration needs to be analyzed further
+                    if (decl.symbol && decl.symbol.flags & meaning) {
+                        var file = ts.getSourceFileOfNode(decl);
+                        var typeReferenceDirective = fileToDirective.get(file.path);
+                        if (typeReferenceDirective) {
+                            (typeReferenceDirectives || (typeReferenceDirectives = [])).push(typeReferenceDirective);
+                        }
+                    }
+                }
+                return typeReferenceDirectives;
+            }
+            function isSymbolFromTypeDeclarationFile(symbol) {
+                // bail out if symbol does not have associated declarations (i.e. this is transient symbol created for property in binding pattern)
+                if (!symbol.declarations) {
+                    return false;
+                }
+                // walk the parent chain for symbols to make sure that top level parent symbol is in the global scope
+                // external modules cannot define or contribute to type declaration files
+                var current = symbol;
+                while (true) {
+                    var parent_12 = getParentOfSymbol(current);
+                    if (parent_12) {
+                        current = parent_12;
+                    }
+                    else {
+                        break;
+                    }
+                }
+                if (current.valueDeclaration && current.valueDeclaration.kind === 256 /* SourceFile */ && current.flags & 512 /* ValueModule */) {
+                    return false;
+                }
+                // check that at least one declaration of top level symbol originates from type declaration file
+                for (var _i = 0, _a = symbol.declarations; _i < _a.length; _i++) {
+                    var decl = _a[_i];
+                    var file = ts.getSourceFileOfNode(decl);
+                    if (fileToDirective.contains(file.path)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+        }
+        function getExternalModuleFileFromDeclaration(declaration) {
+            var specifier = ts.getExternalModuleName(declaration);
+            var moduleSymbol = resolveExternalModuleNameWorker(specifier, specifier, /*moduleNotFoundError*/ undefined);
+            if (!moduleSymbol) {
+                return undefined;
+            }
+            return ts.getDeclarationOfKind(moduleSymbol, 256 /* SourceFile */);
+        }
+        function initializeTypeChecker() {
+            // Bind all source files and propagate errors
+            ts.forEach(host.getSourceFiles(), function (file) {
+                ts.bindSourceFile(file, compilerOptions);
+            });
+            var augmentations;
+            // Initialize global symbol table
+            ts.forEach(host.getSourceFiles(), function (file) {
+                if (!ts.isExternalOrCommonJsModule(file)) {
+                    mergeSymbolTable(globals, file.locals);
+                }
+                if (file.patternAmbientModules && file.patternAmbientModules.length) {
+                    patternAmbientModules = ts.concatenate(patternAmbientModules, file.patternAmbientModules);
+                }
+                if (file.moduleAugmentations.length) {
+                    (augmentations || (augmentations = [])).push(file.moduleAugmentations);
+                }
+                if (file.symbol && file.symbol.globalExports) {
+                    mergeSymbolTable(globals, file.symbol.globalExports);
+                }
+            });
+            if (augmentations) {
+                // merge module augmentations.
+                // this needs to be done after global symbol table is initialized to make sure that all ambient modules are indexed
+                for (var _i = 0, augmentations_1 = augmentations; _i < augmentations_1.length; _i++) {
+                    var list = augmentations_1[_i];
+                    for (var _a = 0, list_2 = list; _a < list_2.length; _a++) {
+                        var augmentation = list_2[_a];
+                        mergeModuleAugmentation(augmentation);
+                    }
+                }
+            }
+            // Setup global builtins
+            addToSymbolTable(globals, builtinGlobals, ts.Diagnostics.Declaration_name_conflicts_with_built_in_global_identifier_0);
+            getSymbolLinks(undefinedSymbol).type = undefinedWideningType;
+            getSymbolLinks(argumentsSymbol).type = getGlobalType("IArguments");
+            getSymbolLinks(unknownSymbol).type = unknownType;
+            // Initialize special types
+            globalArrayType = getGlobalType("Array", /*arity*/ 1);
+            globalObjectType = getGlobalType("Object");
+            globalFunctionType = getGlobalType("Function");
+            globalStringType = getGlobalType("String");
+            globalNumberType = getGlobalType("Number");
+            globalBooleanType = getGlobalType("Boolean");
+            globalRegExpType = getGlobalType("RegExp");
+            jsxElementType = getExportedTypeFromNamespace("JSX", JsxNames.Element);
+            getGlobalClassDecoratorType = ts.memoize(function () { return getGlobalType("ClassDecorator"); });
+            getGlobalPropertyDecoratorType = ts.memoize(function () { return getGlobalType("PropertyDecorator"); });
+            getGlobalMethodDecoratorType = ts.memoize(function () { return getGlobalType("MethodDecorator"); });
+            getGlobalParameterDecoratorType = ts.memoize(function () { return getGlobalType("ParameterDecorator"); });
+            getGlobalTypedPropertyDescriptorType = ts.memoize(function () { return getGlobalType("TypedPropertyDescriptor", /*arity*/ 1); });
+            getGlobalESSymbolConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Symbol"); });
+            getGlobalPromiseType = ts.memoize(function () { return getGlobalType("Promise", /*arity*/ 1); });
+            tryGetGlobalPromiseType = ts.memoize(function () { return getGlobalSymbol("Promise", 793056 /* Type */, /*diagnostic*/ undefined) && getGlobalPromiseType(); });
+            getGlobalPromiseLikeType = ts.memoize(function () { return getGlobalType("PromiseLike", /*arity*/ 1); });
+            getInstantiatedGlobalPromiseLikeType = ts.memoize(createInstantiatedPromiseLikeType);
+            getGlobalPromiseConstructorSymbol = ts.memoize(function () { return getGlobalValueSymbol("Promise"); });
+            getGlobalPromiseConstructorLikeType = ts.memoize(function () { return getGlobalType("PromiseConstructorLike"); });
+            getGlobalThenableType = ts.memoize(createThenableType);
+            getGlobalTemplateStringsArrayType = ts.memoize(function () { return getGlobalType("TemplateStringsArray"); });
+            if (languageVersion >= 2 /* ES6 */) {
+                getGlobalESSymbolType = ts.memoize(function () { return getGlobalType("Symbol"); });
+                getGlobalIterableType = ts.memoize(function () { return getGlobalType("Iterable", /*arity*/ 1); });
+                getGlobalIteratorType = ts.memoize(function () { return getGlobalType("Iterator", /*arity*/ 1); });
+                getGlobalIterableIteratorType = ts.memoize(function () { return getGlobalType("IterableIterator", /*arity*/ 1); });
+            }
+            else {
+                getGlobalESSymbolType = ts.memoize(function () { return emptyObjectType; });
+                getGlobalIterableType = ts.memoize(function () { return emptyGenericType; });
+                getGlobalIteratorType = ts.memoize(function () { return emptyGenericType; });
+                getGlobalIterableIteratorType = ts.memoize(function () { return emptyGenericType; });
+            }
+            anyArrayType = createArrayType(anyType);
+            var symbol = getGlobalSymbol("ReadonlyArray", 793056 /* Type */, /*diagnostic*/ undefined);
+            globalReadonlyArrayType = symbol && getTypeOfGlobalSymbol(symbol, /*arity*/ 1);
+            anyReadonlyArrayType = globalReadonlyArrayType ? createTypeFromGenericGlobalType(globalReadonlyArrayType, [anyType]) : anyArrayType;
+        }
+        function createInstantiatedPromiseLikeType() {
+            var promiseLikeType = getGlobalPromiseLikeType();
+            if (promiseLikeType !== emptyGenericType) {
+                return createTypeReference(promiseLikeType, [anyType]);
+            }
+            return emptyObjectType;
+        }
+        function createThenableType() {
+            // build the thenable type that is used to verify against a non-promise "thenable" operand to `await`.
+            var thenPropertySymbol = createSymbol(67108864 /* Transient */ | 4 /* Property */, "then");
+            getSymbolLinks(thenPropertySymbol).type = globalFunctionType;
+            var thenableType = createObjectType(65536 /* Anonymous */);
+            thenableType.properties = [thenPropertySymbol];
+            thenableType.members = createSymbolTable(thenableType.properties);
+            thenableType.callSignatures = [];
+            thenableType.constructSignatures = [];
+            return thenableType;
+        }
+        // GRAMMAR CHECKING
+        function checkGrammarDecorators(node) {
+            if (!node.decorators) {
+                return false;
+            }
+            if (!ts.nodeCanBeDecorated(node)) {
+                if (node.kind === 147 /* MethodDeclaration */ && !ts.nodeIsPresent(node.body)) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.A_decorator_can_only_decorate_a_method_implementation_not_an_overload);
+                }
+                else {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_are_not_valid_here);
+                }
+            }
+            else if (node.kind === 149 /* GetAccessor */ || node.kind === 150 /* SetAccessor */) {
+                var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+                if (accessors.firstAccessor.decorators && node === accessors.secondAccessor) {
+                    return grammarErrorOnFirstToken(node, ts.Diagnostics.Decorators_cannot_be_applied_to_multiple_get_Slashset_accessors_of_the_same_name);
+                }
+            }
+            return false;
+        }
+        function checkGrammarModifiers(node) {
+            switch (node.kind) {
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 148 /* Constructor */:
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 153 /* IndexSignature */:
+                case 225 /* ModuleDeclaration */:
+                case 230 /* ImportDeclaration */:
+                case 229 /* ImportEqualsDeclaration */:
+                case 236 /* ExportDeclaration */:
+                case 235 /* ExportAssignment */:
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                case 142 /* Parameter */:
+                    break;
+                case 220 /* FunctionDeclaration */:
+                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 118 /* AsyncKeyword */) &&
+                        node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 256 /* SourceFile */) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                case 221 /* ClassDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 200 /* VariableStatement */:
+                case 223 /* TypeAliasDeclaration */:
+                    if (node.modifiers && node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 256 /* SourceFile */) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                case 224 /* EnumDeclaration */:
+                    if (node.modifiers && (node.modifiers.length > 1 || node.modifiers[0].kind !== 74 /* ConstKeyword */) &&
+                        node.parent.kind !== 226 /* ModuleBlock */ && node.parent.kind !== 256 /* SourceFile */) {
+                        return grammarErrorOnFirstToken(node, ts.Diagnostics.Modifiers_cannot_appear_here);
+                    }
+                    break;
+                default:
+                    return false;
+            }
+            if (!node.modifiers) {
+                return;
+            }
+            var lastStatic, lastPrivate, lastProtected, lastDeclare, lastAsync, lastReadonly;
+            var flags = 0;
+            for (var _i = 0, _a = node.modifiers; _i < _a.length; _i++) {
+                var modifier = _a[_i];
+                if (modifier.kind !== 128 /* ReadonlyKeyword */) {
+                    if (node.kind === 144 /* PropertySignature */ || node.kind === 146 /* MethodSignature */) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_type_member, ts.tokenToString(modifier.kind));
+                    }
+                    if (node.kind === 153 /* IndexSignature */) {
+                        return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_an_index_signature, ts.tokenToString(modifier.kind));
+                    }
+                }
+                switch (modifier.kind) {
+                    case 74 /* ConstKeyword */:
+                        if (node.kind !== 224 /* EnumDeclaration */ && node.parent.kind === 221 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(node, ts.Diagnostics.A_class_member_cannot_have_the_0_keyword, ts.tokenToString(74 /* ConstKeyword */));
+                        }
+                        break;
+                    case 112 /* PublicKeyword */:
+                    case 111 /* ProtectedKeyword */:
+                    case 110 /* PrivateKeyword */:
+                        var text = visibilityToString(ts.modifierToFlag(modifier.kind));
+                        if (modifier.kind === 111 /* ProtectedKeyword */) {
+                            lastProtected = modifier;
+                        }
+                        else if (modifier.kind === 110 /* PrivateKeyword */) {
+                            lastPrivate = modifier;
+                        }
+                        if (flags & 28 /* AccessibilityModifier */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.Accessibility_modifier_already_seen);
+                        }
+                        else if (flags & 32 /* Static */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "static");
+                        }
+                        else if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "readonly");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "async");
+                        }
+                        else if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, text);
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            if (modifier.kind === 110 /* PrivateKeyword */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, text, "abstract");
+                            }
+                            else {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, text, "abstract");
+                            }
+                        }
+                        flags |= ts.modifierToFlag(modifier.kind);
+                        break;
+                    case 113 /* StaticKeyword */:
+                        if (flags & 32 /* Static */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "static");
+                        }
+                        else if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "readonly");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "static", "async");
+                        }
+                        else if (node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_module_or_namespace_element, "static");
+                        }
+                        else if (node.kind === 142 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "static");
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                        }
+                        flags |= 32 /* Static */;
+                        lastStatic = modifier;
+                        break;
+                    case 128 /* ReadonlyKeyword */:
+                        if (flags & 64 /* Readonly */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "readonly");
+                        }
+                        else if (node.kind !== 145 /* PropertyDeclaration */ && node.kind !== 144 /* PropertySignature */ && node.kind !== 153 /* IndexSignature */ && node.kind !== 142 /* Parameter */) {
+                            // If node.kind === SyntaxKind.Parameter, checkParameter report an error if it's not a parameter property.
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.readonly_modifier_can_only_appear_on_a_property_declaration_or_index_signature);
+                        }
+                        flags |= 64 /* Readonly */;
+                        lastReadonly = modifier;
+                        break;
+                    case 82 /* ExportKeyword */:
+                        if (flags & 1 /* Export */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "export");
+                        }
+                        else if (flags & 2 /* Ambient */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "declare");
+                        }
+                        else if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "abstract");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_must_precede_1_modifier, "export", "async");
+                        }
+                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "export");
+                        }
+                        else if (node.kind === 142 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "export");
+                        }
+                        flags |= 1 /* Export */;
+                        break;
+                    case 122 /* DeclareKeyword */:
+                        if (flags & 2 /* Ambient */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "declare");
+                        }
+                        else if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_class_element, "declare");
+                        }
+                        else if (node.kind === 142 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "declare");
+                        }
+                        else if (ts.isInAmbientContext(node.parent) && node.parent.kind === 226 /* ModuleBlock */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics.A_declare_modifier_cannot_be_used_in_an_already_ambient_context);
+                        }
+                        flags |= 2 /* Ambient */;
+                        lastDeclare = modifier;
+                        break;
+                    case 115 /* AbstractKeyword */:
+                        if (flags & 128 /* Abstract */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "abstract");
+                        }
+                        if (node.kind !== 221 /* ClassDeclaration */) {
+                            if (node.kind !== 147 /* MethodDeclaration */ &&
+                                node.kind !== 145 /* PropertyDeclaration */ &&
+                                node.kind !== 149 /* GetAccessor */ &&
+                                node.kind !== 150 /* SetAccessor */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.abstract_modifier_can_only_appear_on_a_class_method_or_property_declaration);
+                            }
+                            if (!(node.parent.kind === 221 /* ClassDeclaration */ && node.parent.flags & 128 /* Abstract */)) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics.Abstract_methods_can_only_appear_within_an_abstract_class);
+                            }
+                            if (flags & 32 /* Static */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "static", "abstract");
+                            }
+                            if (flags & 8 /* Private */) {
+                                return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_with_1_modifier, "private", "abstract");
+                            }
+                        }
+                        flags |= 128 /* Abstract */;
+                        break;
+                    case 118 /* AsyncKeyword */:
+                        if (flags & 256 /* Async */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_already_seen, "async");
+                        }
+                        else if (flags & 2 /* Ambient */ || ts.isInAmbientContext(node.parent)) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_be_used_in_an_ambient_context, "async");
+                        }
+                        else if (node.kind === 142 /* Parameter */) {
+                            return grammarErrorOnNode(modifier, ts.Diagnostics._0_modifier_cannot_appear_on_a_parameter, "async");
+                        }
+                        flags |= 256 /* Async */;
+                        lastAsync = modifier;
+                        break;
+                }
+            }
+            if (node.kind === 148 /* Constructor */) {
+                if (flags & 32 /* Static */) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "static");
+                }
+                if (flags & 128 /* Abstract */) {
+                    return grammarErrorOnNode(lastStatic, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "abstract");
+                }
+                else if (flags & 256 /* Async */) {
+                    return grammarErrorOnNode(lastAsync, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "async");
+                }
+                else if (flags & 64 /* Readonly */) {
+                    return grammarErrorOnNode(lastReadonly, ts.Diagnostics._0_modifier_cannot_appear_on_a_constructor_declaration, "readonly");
+                }
+                return;
+            }
+            else if ((node.kind === 230 /* ImportDeclaration */ || node.kind === 229 /* ImportEqualsDeclaration */) && flags & 2 /* Ambient */) {
+                return grammarErrorOnNode(lastDeclare, ts.Diagnostics.A_0_modifier_cannot_be_used_with_an_import_declaration, "declare");
+            }
+            else if (node.kind === 142 /* Parameter */ && (flags & 92 /* ParameterPropertyModifier */) && ts.isBindingPattern(node.name)) {
+                return grammarErrorOnNode(node, ts.Diagnostics.A_parameter_property_may_not_be_a_binding_pattern);
+            }
+            if (flags & 256 /* Async */) {
+                return checkGrammarAsyncModifier(node, lastAsync);
+            }
+        }
+        function checkGrammarAsyncModifier(node, asyncModifier) {
+            if (languageVersion < 2 /* ES6 */) {
+                return grammarErrorOnNode(asyncModifier, ts.Diagnostics.Async_functions_are_only_available_when_targeting_ECMAScript_2015_or_higher);
+            }
+            switch (node.kind) {
+                case 147 /* MethodDeclaration */:
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    if (!node.asteriskToken) {
+                        return false;
+                    }
+                    break;
+            }
+            return grammarErrorOnNode(asyncModifier, ts.Diagnostics._0_modifier_cannot_be_used_here, "async");
+        }
+        function checkGrammarForDisallowedTrailingComma(list) {
+            if (list && list.hasTrailingComma) {
+                var start = list.end - ",".length;
+                var end = list.end;
+                var sourceFile = ts.getSourceFileOfNode(list[0]);
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Trailing_comma_not_allowed);
+            }
+        }
+        function checkGrammarTypeParameterList(node, typeParameters, file) {
+            if (checkGrammarForDisallowedTrailingComma(typeParameters)) {
+                return true;
+            }
+            if (typeParameters && typeParameters.length === 0) {
+                var start = typeParameters.pos - "<".length;
+                var end = ts.skipTrivia(file.text, typeParameters.end) + ">".length;
+                return grammarErrorAtPos(file, start, end - start, ts.Diagnostics.Type_parameter_list_cannot_be_empty);
+            }
+        }
+        function checkGrammarParameterList(parameters) {
+            var seenOptionalParameter = false;
+            var parameterCount = parameters.length;
+            for (var i = 0; i < parameterCount; i++) {
+                var parameter = parameters[i];
+                if (parameter.dotDotDotToken) {
+                    if (i !== (parameterCount - 1)) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_rest_parameter_must_be_last_in_a_parameter_list);
+                    }
+                    if (ts.isBindingPattern(parameter.name)) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                    }
+                    if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_rest_parameter_cannot_be_optional);
+                    }
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_rest_parameter_cannot_have_an_initializer);
+                    }
+                }
+                else if (parameter.questionToken) {
+                    seenOptionalParameter = true;
+                    if (parameter.initializer) {
+                        return grammarErrorOnNode(parameter.name, ts.Diagnostics.Parameter_cannot_have_question_mark_and_initializer);
+                    }
+                }
+                else if (seenOptionalParameter && !parameter.initializer) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.A_required_parameter_cannot_follow_an_optional_parameter);
+                }
+            }
+        }
+        function checkGrammarFunctionLikeDeclaration(node) {
+            // Prevent cascading error by short-circuit
+            var file = ts.getSourceFileOfNode(node);
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarTypeParameterList(node, node.typeParameters, file) ||
+                checkGrammarParameterList(node.parameters) || checkGrammarArrowFunction(node, file);
+        }
+        function checkGrammarArrowFunction(node, file) {
+            if (node.kind === 180 /* ArrowFunction */) {
+                var arrowFunction = node;
+                var startLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.pos).line;
+                var endLine = ts.getLineAndCharacterOfPosition(file, arrowFunction.equalsGreaterThanToken.end).line;
+                if (startLine !== endLine) {
+                    return grammarErrorOnNode(arrowFunction.equalsGreaterThanToken, ts.Diagnostics.Line_terminator_not_permitted_before_arrow);
+                }
+            }
+            return false;
+        }
+        function checkGrammarIndexSignatureParameters(node) {
+            var parameter = node.parameters[0];
+            if (node.parameters.length !== 1) {
+                if (parameter) {
+                    return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                }
+                else {
+                    return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_exactly_one_parameter);
+                }
+            }
+            if (parameter.dotDotDotToken) {
+                return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.An_index_signature_cannot_have_a_rest_parameter);
+            }
+            if (parameter.flags & 1023 /* Modifier */) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_accessibility_modifier);
+            }
+            if (parameter.questionToken) {
+                return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.An_index_signature_parameter_cannot_have_a_question_mark);
+            }
+            if (parameter.initializer) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_cannot_have_an_initializer);
+            }
+            if (!parameter.type) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_must_have_a_type_annotation);
+            }
+            if (parameter.type.kind !== 132 /* StringKeyword */ && parameter.type.kind !== 130 /* NumberKeyword */) {
+                return grammarErrorOnNode(parameter.name, ts.Diagnostics.An_index_signature_parameter_type_must_be_string_or_number);
+            }
+            if (!node.type) {
+                return grammarErrorOnNode(node, ts.Diagnostics.An_index_signature_must_have_a_type_annotation);
+            }
+        }
+        function checkGrammarIndexSignature(node) {
+            // Prevent cascading error by short-circuit
+            return checkGrammarDecorators(node) || checkGrammarModifiers(node) || checkGrammarIndexSignatureParameters(node);
+        }
+        function checkGrammarForAtLeastOneTypeArgument(node, typeArguments) {
+            if (typeArguments && typeArguments.length === 0) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                var start = typeArguments.pos - "<".length;
+                var end = ts.skipTrivia(sourceFile.text, typeArguments.end) + ">".length;
+                return grammarErrorAtPos(sourceFile, start, end - start, ts.Diagnostics.Type_argument_list_cannot_be_empty);
+            }
+        }
+        function checkGrammarTypeArguments(node, typeArguments) {
+            return checkGrammarForDisallowedTrailingComma(typeArguments) ||
+                checkGrammarForAtLeastOneTypeArgument(node, typeArguments);
+        }
+        function checkGrammarForOmittedArgument(node, args) {
+            if (args) {
+                var sourceFile = ts.getSourceFileOfNode(node);
+                for (var _i = 0, args_1 = args; _i < args_1.length; _i++) {
+                    var arg = args_1[_i];
+                    if (arg.kind === 193 /* OmittedExpression */) {
+                        return grammarErrorAtPos(sourceFile, arg.pos, 0, ts.Diagnostics.Argument_expression_expected);
+                    }
+                }
+            }
+        }
+        function checkGrammarArguments(node, args) {
+            return checkGrammarForOmittedArgument(node, args);
+        }
+        function checkGrammarHeritageClause(node) {
+            var types = node.types;
+            if (checkGrammarForDisallowedTrailingComma(types)) {
+                return true;
+            }
+            if (types && types.length === 0) {
+                var listType = ts.tokenToString(node.token);
+                var sourceFile = ts.getSourceFileOfNode(node);
+                return grammarErrorAtPos(sourceFile, types.pos, 0, ts.Diagnostics._0_list_cannot_be_empty, listType);
+            }
+        }
+        function checkGrammarClassDeclarationHeritageClauses(node) {
+            var seenExtendsClause = false;
+            var seenImplementsClause = false;
+            if (!checkGrammarDecorators(node) && !checkGrammarModifiers(node) && node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 83 /* ExtendsKeyword */) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_must_precede_implements_clause);
+                        }
+                        if (heritageClause.types.length > 1) {
+                            return grammarErrorOnFirstToken(heritageClause.types[1], ts.Diagnostics.Classes_can_only_extend_a_single_class);
+                        }
+                        seenExtendsClause = true;
+                    }
+                    else {
+                        ts.Debug.assert(heritageClause.token === 106 /* ImplementsKeyword */);
+                        if (seenImplementsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.implements_clause_already_seen);
+                        }
+                        seenImplementsClause = true;
+                    }
+                    // Grammar checking heritageClause inside class declaration
+                    checkGrammarHeritageClause(heritageClause);
+                }
+            }
+        }
+        function checkGrammarInterfaceDeclaration(node) {
+            var seenExtendsClause = false;
+            if (node.heritageClauses) {
+                for (var _i = 0, _a = node.heritageClauses; _i < _a.length; _i++) {
+                    var heritageClause = _a[_i];
+                    if (heritageClause.token === 83 /* ExtendsKeyword */) {
+                        if (seenExtendsClause) {
+                            return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.extends_clause_already_seen);
+                        }
+                        seenExtendsClause = true;
+                    }
+                    else {
+                        ts.Debug.assert(heritageClause.token === 106 /* ImplementsKeyword */);
+                        return grammarErrorOnFirstToken(heritageClause, ts.Diagnostics.Interface_declaration_cannot_have_implements_clause);
+                    }
+                    // Grammar checking heritageClause inside class declaration
+                    checkGrammarHeritageClause(heritageClause);
+                }
+            }
+            return false;
+        }
+        function checkGrammarComputedPropertyName(node) {
+            // If node is not a computedPropertyName, just skip the grammar checking
+            if (node.kind !== 140 /* ComputedPropertyName */) {
+                return false;
+            }
+            var computedPropertyName = node;
+            if (computedPropertyName.expression.kind === 187 /* BinaryExpression */ && computedPropertyName.expression.operatorToken.kind === 24 /* CommaToken */) {
+                return grammarErrorOnNode(computedPropertyName.expression, ts.Diagnostics.A_comma_expression_is_not_allowed_in_a_computed_property_name);
+            }
+        }
+        function checkGrammarForGenerator(node) {
+            if (node.asteriskToken) {
+                ts.Debug.assert(node.kind === 220 /* FunctionDeclaration */ ||
+                    node.kind === 179 /* FunctionExpression */ ||
+                    node.kind === 147 /* MethodDeclaration */);
+                if (ts.isInAmbientContext(node)) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_not_allowed_in_an_ambient_context);
+                }
+                if (!node.body) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.An_overload_signature_cannot_be_declared_as_a_generator);
+                }
+                if (languageVersion < 2 /* ES6 */) {
+                    return grammarErrorOnNode(node.asteriskToken, ts.Diagnostics.Generators_are_only_available_when_targeting_ECMAScript_2015_or_higher);
+                }
+            }
+        }
+        function checkGrammarForInvalidQuestionMark(node, questionToken, message) {
+            if (questionToken) {
+                return grammarErrorOnNode(questionToken, message);
+            }
+        }
+        function checkGrammarObjectLiteralExpression(node, inDestructuring) {
+            var seen = {};
+            var Property = 1;
+            var GetAccessor = 2;
+            var SetAccessor = 4;
+            var GetOrSetAccessor = GetAccessor | SetAccessor;
+            var _loop_1 = function(prop) {
+                var name_21 = prop.name;
+                if (prop.kind === 193 /* OmittedExpression */ ||
+                    name_21.kind === 140 /* ComputedPropertyName */) {
+                    // If the name is not a ComputedPropertyName, the grammar checking will skip it
+                    checkGrammarComputedPropertyName(name_21);
+                }
+                if (prop.kind === 254 /* ShorthandPropertyAssignment */ && !inDestructuring && prop.objectAssignmentInitializer) {
+                    // having objectAssignmentInitializer is only valid in ObjectAssignmentPattern
+                    // outside of destructuring it is a syntax error
+                    return { value: grammarErrorOnNode(prop.equalsToken, ts.Diagnostics.can_only_be_used_in_an_object_literal_property_inside_a_destructuring_assignment) };
+                }
+                // Modifiers are never allowed on properties except for 'async' on a method declaration
+                ts.forEach(prop.modifiers, function (mod) {
+                    if (mod.kind !== 118 /* AsyncKeyword */ || prop.kind !== 147 /* MethodDeclaration */) {
+                        grammarErrorOnNode(mod, ts.Diagnostics._0_modifier_cannot_be_used_here, ts.getTextOfNode(mod));
+                    }
+                });
+                // ECMA-262 11.1.5 Object Initializer
+                // If previous is not undefined then throw a SyntaxError exception if any of the following conditions are true
+                // a.This production is contained in strict code and IsDataDescriptor(previous) is true and
+                // IsDataDescriptor(propId.descriptor) is true.
+                //    b.IsDataDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true.
+                //    c.IsAccessorDescriptor(previous) is true and IsDataDescriptor(propId.descriptor) is true.
+                //    d.IsAccessorDescriptor(previous) is true and IsAccessorDescriptor(propId.descriptor) is true
+                // and either both previous and propId.descriptor have[[Get]] fields or both previous and propId.descriptor have[[Set]] fields
+                var currentKind = void 0;
+                if (prop.kind === 253 /* PropertyAssignment */ || prop.kind === 254 /* ShorthandPropertyAssignment */) {
+                    // Grammar checking for computedPropertyName and shorthandPropertyAssignment
+                    checkGrammarForInvalidQuestionMark(prop, prop.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional);
+                    if (name_21.kind === 8 /* NumericLiteral */) {
+                        checkGrammarNumericLiteral(name_21);
+                    }
+                    currentKind = Property;
+                }
+                else if (prop.kind === 147 /* MethodDeclaration */) {
+                    currentKind = Property;
+                }
+                else if (prop.kind === 149 /* GetAccessor */) {
+                    currentKind = GetAccessor;
+                }
+                else if (prop.kind === 150 /* SetAccessor */) {
+                    currentKind = SetAccessor;
+                }
+                else {
+                    ts.Debug.fail("Unexpected syntax kind:" + prop.kind);
+                }
+                var effectiveName = ts.getPropertyNameForPropertyNameNode(name_21);
+                if (effectiveName === undefined) {
+                    return "continue";
+                }
+                if (!ts.hasProperty(seen, effectiveName)) {
+                    seen[effectiveName] = currentKind;
+                }
+                else {
+                    var existingKind = seen[effectiveName];
+                    if (currentKind === Property && existingKind === Property) {
+                        grammarErrorOnNode(name_21, ts.Diagnostics.Duplicate_identifier_0, ts.getTextOfNode(name_21));
+                    }
+                    else if ((currentKind & GetOrSetAccessor) && (existingKind & GetOrSetAccessor)) {
+                        if (existingKind !== GetOrSetAccessor && currentKind !== existingKind) {
+                            seen[effectiveName] = currentKind | existingKind;
+                        }
+                        else {
+                            return { value: grammarErrorOnNode(name_21, ts.Diagnostics.An_object_literal_cannot_have_multiple_get_Slashset_accessors_with_the_same_name) };
+                        }
+                    }
+                    else {
+                        return { value: grammarErrorOnNode(name_21, ts.Diagnostics.An_object_literal_cannot_have_property_and_accessor_with_the_same_name) };
+                    }
+                }
+            };
+            for (var _i = 0, _a = node.properties; _i < _a.length; _i++) {
+                var prop = _a[_i];
+                var state_2 = _loop_1(prop);
+                if (typeof state_2 === "object") return state_2.value;
+            }
+        }
+        function checkGrammarJsxElement(node) {
+            var seen = {};
+            for (var _i = 0, _a = node.attributes; _i < _a.length; _i++) {
+                var attr = _a[_i];
+                if (attr.kind === 247 /* JsxSpreadAttribute */) {
+                    continue;
+                }
+                var jsxAttr = attr;
+                var name_22 = jsxAttr.name;
+                if (!ts.hasProperty(seen, name_22.text)) {
+                    seen[name_22.text] = true;
+                }
+                else {
+                    return grammarErrorOnNode(name_22, ts.Diagnostics.JSX_elements_cannot_have_multiple_attributes_with_the_same_name);
+                }
+                var initializer = jsxAttr.initializer;
+                if (initializer && initializer.kind === 248 /* JsxExpression */ && !initializer.expression) {
+                    return grammarErrorOnNode(jsxAttr.initializer, ts.Diagnostics.JSX_attributes_must_only_be_assigned_a_non_empty_expression);
+                }
+            }
+        }
+        function checkGrammarForInOrForOfStatement(forInOrOfStatement) {
+            if (checkGrammarStatementInAmbientContext(forInOrOfStatement)) {
+                return true;
+            }
+            if (forInOrOfStatement.initializer.kind === 219 /* VariableDeclarationList */) {
+                var variableList = forInOrOfStatement.initializer;
+                if (!checkGrammarVariableDeclarationList(variableList)) {
+                    var declarations = variableList.declarations;
+                    // declarations.length can be zero if there is an error in variable declaration in for-of or for-in
+                    // See http://www.ecma-international.org/ecma-262/6.0/#sec-for-in-and-for-of-statements for details
+                    // For example:
+                    //      var let = 10;
+                    //      for (let of [1,2,3]) {} // this is invalid ES6 syntax
+                    //      for (let in [1,2,3]) {} // this is invalid ES6 syntax
+                    // We will then want to skip on grammar checking on variableList declaration
+                    if (!declarations.length) {
+                        return false;
+                    }
+                    if (declarations.length > 1) {
+                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
+                            ? ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_in_statement
+                            : ts.Diagnostics.Only_a_single_variable_declaration_is_allowed_in_a_for_of_statement;
+                        return grammarErrorOnFirstToken(variableList.declarations[1], diagnostic);
+                    }
+                    var firstDeclaration = declarations[0];
+                    if (firstDeclaration.initializer) {
+                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
+                            ? ts.Diagnostics.The_variable_declaration_of_a_for_in_statement_cannot_have_an_initializer
+                            : ts.Diagnostics.The_variable_declaration_of_a_for_of_statement_cannot_have_an_initializer;
+                        return grammarErrorOnNode(firstDeclaration.name, diagnostic);
+                    }
+                    if (firstDeclaration.type) {
+                        var diagnostic = forInOrOfStatement.kind === 207 /* ForInStatement */
+                            ? ts.Diagnostics.The_left_hand_side_of_a_for_in_statement_cannot_use_a_type_annotation
+                            : ts.Diagnostics.The_left_hand_side_of_a_for_of_statement_cannot_use_a_type_annotation;
+                        return grammarErrorOnNode(firstDeclaration, diagnostic);
+                    }
+                }
+            }
+            return false;
+        }
+        function checkGrammarAccessor(accessor) {
+            var kind = accessor.kind;
+            if (languageVersion < 1 /* ES5 */) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.Accessors_are_only_available_when_targeting_ECMAScript_5_and_higher);
+            }
+            else if (ts.isInAmbientContext(accessor)) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_be_declared_in_an_ambient_context);
+            }
+            else if (accessor.body === undefined && !(accessor.flags & 128 /* Abstract */)) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(accessor), accessor.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+            }
+            else if (accessor.typeParameters) {
+                return grammarErrorOnNode(accessor.name, ts.Diagnostics.An_accessor_cannot_have_type_parameters);
+            }
+            else if (!doesAccessorHaveCorrectParameterCount(accessor)) {
+                return grammarErrorOnNode(accessor.name, kind === 149 /* GetAccessor */ ?
+                    ts.Diagnostics.A_get_accessor_cannot_have_parameters :
+                    ts.Diagnostics.A_set_accessor_must_have_exactly_one_parameter);
+            }
+            else if (kind === 150 /* SetAccessor */) {
+                if (accessor.type) {
+                    return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_cannot_have_a_return_type_annotation);
+                }
+                else {
+                    var parameter = accessor.parameters[0];
+                    if (parameter.dotDotDotToken) {
+                        return grammarErrorOnNode(parameter.dotDotDotToken, ts.Diagnostics.A_set_accessor_cannot_have_rest_parameter);
+                    }
+                    else if (parameter.questionToken) {
+                        return grammarErrorOnNode(parameter.questionToken, ts.Diagnostics.A_set_accessor_cannot_have_an_optional_parameter);
+                    }
+                    else if (parameter.initializer) {
+                        return grammarErrorOnNode(accessor.name, ts.Diagnostics.A_set_accessor_parameter_cannot_have_an_initializer);
+                    }
+                }
+            }
+        }
+        /** Does the accessor have the right number of parameters?
+
+            A get accessor has no parameters or a single `this` parameter.
+            A set accessor has one parameter or a `this` parameter and one more parameter */
+        function doesAccessorHaveCorrectParameterCount(accessor) {
+            return getAccessorThisParameter(accessor) || accessor.parameters.length === (accessor.kind === 149 /* GetAccessor */ ? 0 : 1);
+        }
+        function getAccessorThisParameter(accessor) {
+            if (accessor.parameters.length === (accessor.kind === 149 /* GetAccessor */ ? 1 : 2) &&
+                accessor.parameters[0].name.kind === 69 /* Identifier */ &&
+                accessor.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */) {
+                return accessor.parameters[0];
+            }
+        }
+        function getFunctionLikeThisParameter(func) {
+            if (func.parameters.length &&
+                func.parameters[0].name.kind === 69 /* Identifier */ &&
+                func.parameters[0].name.originalKeywordKind === 97 /* ThisKeyword */) {
+                return func.parameters[0];
+            }
+        }
+        function checkGrammarForNonSymbolComputedProperty(node, message) {
+            if (ts.isDynamicName(node)) {
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarMethod(node) {
+            if (checkGrammarDisallowedModifiersOnObjectLiteralExpressionMethod(node) ||
+                checkGrammarFunctionLikeDeclaration(node) ||
+                checkGrammarForGenerator(node)) {
+                return true;
+            }
+            if (node.parent.kind === 171 /* ObjectLiteralExpression */) {
+                if (checkGrammarForInvalidQuestionMark(node, node.questionToken, ts.Diagnostics.An_object_member_cannot_be_declared_optional)) {
+                    return true;
+                }
+                else if (node.body === undefined) {
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.end - 1, ";".length, ts.Diagnostics._0_expected, "{");
+                }
+            }
+            if (ts.isClassLike(node.parent)) {
+                // Technically, computed properties in ambient contexts is disallowed
+                // for property declarations and accessors too, not just methods.
+                // However, property declarations disallow computed names in general,
+                // and accessors are not allowed in ambient contexts in general,
+                // so this error only really matters for methods.
+                if (ts.isInAmbientContext(node)) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_ambient_context_must_directly_refer_to_a_built_in_symbol);
+                }
+                else if (!node.body) {
+                    return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_method_overload_must_directly_refer_to_a_built_in_symbol);
+                }
+            }
+            else if (node.parent.kind === 222 /* InterfaceDeclaration */) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol);
+            }
+            else if (node.parent.kind === 159 /* TypeLiteral */) {
+                return checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol);
+            }
+        }
+        function checkGrammarBreakOrContinueStatement(node) {
+            var current = node;
+            while (current) {
+                if (ts.isFunctionLike(current)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.Jump_target_cannot_cross_function_boundary);
+                }
+                switch (current.kind) {
+                    case 214 /* LabeledStatement */:
+                        if (node.label && current.label.text === node.label.text) {
+                            // found matching label - verify that label usage is correct
+                            // continue can only target labels that are on iteration statements
+                            var isMisplacedContinueLabel = node.kind === 209 /* ContinueStatement */
+                                && !ts.isIterationStatement(current.statement, /*lookInLabeledStatement*/ true);
+                            if (isMisplacedContinueLabel) {
+                                return grammarErrorOnNode(node, ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement);
+                            }
+                            return false;
+                        }
+                        break;
+                    case 213 /* SwitchStatement */:
+                        if (node.kind === 210 /* BreakStatement */ && !node.label) {
+                            // unlabeled break within switch statement - ok
+                            return false;
+                        }
+                        break;
+                    default:
+                        if (ts.isIterationStatement(current, /*lookInLabeledStatement*/ false) && !node.label) {
+                            // unlabeled break or continue within iteration statement - ok
+                            return false;
+                        }
+                        break;
+                }
+                current = current.parent;
+            }
+            if (node.label) {
+                var message = node.kind === 210 /* BreakStatement */
+                    ? ts.Diagnostics.A_break_statement_can_only_jump_to_a_label_of_an_enclosing_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_jump_to_a_label_of_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+            else {
+                var message = node.kind === 210 /* BreakStatement */
+                    ? ts.Diagnostics.A_break_statement_can_only_be_used_within_an_enclosing_iteration_or_switch_statement
+                    : ts.Diagnostics.A_continue_statement_can_only_be_used_within_an_enclosing_iteration_statement;
+                return grammarErrorOnNode(node, message);
+            }
+        }
+        function checkGrammarBindingElement(node) {
+            if (node.dotDotDotToken) {
+                var elements = node.parent.elements;
+                if (node !== ts.lastOrUndefined(elements)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.A_rest_element_must_be_last_in_an_array_destructuring_pattern);
+                }
+                if (node.name.kind === 168 /* ArrayBindingPattern */ || node.name.kind === 167 /* ObjectBindingPattern */) {
+                    return grammarErrorOnNode(node.name, ts.Diagnostics.A_rest_element_cannot_contain_a_binding_pattern);
+                }
+                if (node.initializer) {
+                    // Error on equals token which immediate precedes the initializer
+                    return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - 1, 1, ts.Diagnostics.A_rest_element_cannot_have_an_initializer);
+                }
+            }
+        }
+        function checkGrammarVariableDeclaration(node) {
+            if (node.parent.parent.kind !== 207 /* ForInStatement */ && node.parent.parent.kind !== 208 /* ForOfStatement */) {
+                if (ts.isInAmbientContext(node)) {
+                    if (node.initializer) {
+                        // Error on equals token which immediate precedes the initializer
+                        var equalsTokenLength = "=".length;
+                        return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.initializer.pos - equalsTokenLength, equalsTokenLength, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+                    }
+                }
+                else if (!node.initializer) {
+                    if (ts.isBindingPattern(node.name) && !ts.isBindingPattern(node.parent)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.A_destructuring_declaration_must_have_an_initializer);
+                    }
+                    if (ts.isConst(node)) {
+                        return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_must_be_initialized);
+                    }
+                }
+            }
+            var checkLetConstNames = (ts.isLet(node) || ts.isConst(node));
+            // 1. LexicalDeclaration : LetOrConst BindingList ;
+            // It is a Syntax Error if the BoundNames of BindingList contains "let".
+            // 2. ForDeclaration: ForDeclaration : LetOrConst ForBinding
+            // It is a Syntax Error if the BoundNames of ForDeclaration contains "let".
+            // It is a SyntaxError if a VariableDeclaration or VariableDeclarationNoIn occurs within strict code
+            // and its Identifier is eval or arguments
+            return checkLetConstNames && checkGrammarNameInLetOrConstDeclarations(node.name);
+        }
+        function checkGrammarNameInLetOrConstDeclarations(name) {
+            if (name.kind === 69 /* Identifier */) {
+                if (name.originalKeywordKind === 108 /* LetKeyword */) {
+                    return grammarErrorOnNode(name, ts.Diagnostics.let_is_not_allowed_to_be_used_as_a_name_in_let_or_const_declarations);
+                }
+            }
+            else {
+                var elements = name.elements;
+                for (var _i = 0, elements_2 = elements; _i < elements_2.length; _i++) {
+                    var element = elements_2[_i];
+                    if (element.kind !== 193 /* OmittedExpression */) {
+                        checkGrammarNameInLetOrConstDeclarations(element.name);
+                    }
+                }
+            }
+        }
+        function checkGrammarVariableDeclarationList(declarationList) {
+            var declarations = declarationList.declarations;
+            if (checkGrammarForDisallowedTrailingComma(declarationList.declarations)) {
+                return true;
+            }
+            if (!declarationList.declarations.length) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(declarationList), declarations.pos, declarations.end - declarations.pos, ts.Diagnostics.Variable_declaration_list_cannot_be_empty);
+            }
+        }
+        function allowLetAndConstDeclarations(parent) {
+            switch (parent.kind) {
+                case 203 /* IfStatement */:
+                case 204 /* DoStatement */:
+                case 205 /* WhileStatement */:
+                case 212 /* WithStatement */:
+                case 206 /* ForStatement */:
+                case 207 /* ForInStatement */:
+                case 208 /* ForOfStatement */:
+                    return false;
+                case 214 /* LabeledStatement */:
+                    return allowLetAndConstDeclarations(parent.parent);
+            }
+            return true;
+        }
+        function checkGrammarForDisallowedLetOrConstStatement(node) {
+            if (!allowLetAndConstDeclarations(node.parent)) {
+                if (ts.isLet(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.let_declarations_can_only_be_declared_inside_a_block);
+                }
+                else if (ts.isConst(node.declarationList)) {
+                    return grammarErrorOnNode(node, ts.Diagnostics.const_declarations_can_only_be_declared_inside_a_block);
+                }
+            }
+        }
+        function hasParseDiagnostics(sourceFile) {
+            return sourceFile.parseDiagnostics.length > 0;
+        }
+        function grammarErrorOnFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, span.start, span.length, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function grammarErrorAtPos(sourceFile, start, length, message, arg0, arg1, arg2) {
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, start, length, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function grammarErrorOnNode(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                diagnostics.add(ts.createDiagnosticForNode(node, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        function checkGrammarConstructorTypeParameters(node) {
+            if (node.typeParameters) {
+                return grammarErrorAtPos(ts.getSourceFileOfNode(node), node.typeParameters.pos, node.typeParameters.end - node.typeParameters.pos, ts.Diagnostics.Type_parameters_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarConstructorTypeAnnotation(node) {
+            if (node.type) {
+                return grammarErrorOnNode(node.type, ts.Diagnostics.Type_annotation_cannot_appear_on_a_constructor_declaration);
+            }
+        }
+        function checkGrammarProperty(node) {
+            if (ts.isClassLike(node.parent)) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_class_property_declaration_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+            }
+            else if (node.parent.kind === 222 /* InterfaceDeclaration */) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_an_interface_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.An_interface_property_cannot_have_an_initializer);
+                }
+            }
+            else if (node.parent.kind === 159 /* TypeLiteral */) {
+                if (checkGrammarForNonSymbolComputedProperty(node.name, ts.Diagnostics.A_computed_property_name_in_a_type_literal_must_directly_refer_to_a_built_in_symbol)) {
+                    return true;
+                }
+                if (node.initializer) {
+                    return grammarErrorOnNode(node.initializer, ts.Diagnostics.A_type_literal_property_cannot_have_an_initializer);
+                }
+            }
+            if (ts.isInAmbientContext(node) && node.initializer) {
+                return grammarErrorOnFirstToken(node.initializer, ts.Diagnostics.Initializers_are_not_allowed_in_ambient_contexts);
+            }
+        }
+        function checkGrammarTopLevelElementForRequiredDeclareModifier(node) {
+            // A declare modifier is required for any top level .d.ts declaration except export=, export default,
+            // interfaces and imports categories:
+            //
+            //  DeclarationElement:
+            //     ExportAssignment
+            //     export_opt   InterfaceDeclaration
+            //     export_opt   TypeAliasDeclaration
+            //     export_opt   ImportDeclaration
+            //     export_opt   ExternalImportDeclaration
+            //     export_opt   AmbientDeclaration
+            //
+            // TODO: The spec needs to be amended to reflect this grammar.
+            if (node.kind === 222 /* InterfaceDeclaration */ ||
+                node.kind === 223 /* TypeAliasDeclaration */ ||
+                node.kind === 230 /* ImportDeclaration */ ||
+                node.kind === 229 /* ImportEqualsDeclaration */ ||
+                node.kind === 236 /* ExportDeclaration */ ||
+                node.kind === 235 /* ExportAssignment */ ||
+                (node.flags & 2 /* Ambient */) ||
+                (node.flags & (1 /* Export */ | 512 /* Default */))) {
+                return false;
+            }
+            return grammarErrorOnFirstToken(node, ts.Diagnostics.A_declare_modifier_is_required_for_a_top_level_declaration_in_a_d_ts_file);
+        }
+        function checkGrammarTopLevelElementsForRequiredDeclareModifier(file) {
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var decl = _a[_i];
+                if (ts.isDeclaration(decl) || decl.kind === 200 /* VariableStatement */) {
+                    if (checkGrammarTopLevelElementForRequiredDeclareModifier(decl)) {
+                        return true;
+                    }
+                }
+            }
+        }
+        function checkGrammarSourceFile(node) {
+            return ts.isInAmbientContext(node) && checkGrammarTopLevelElementsForRequiredDeclareModifier(node);
+        }
+        function checkGrammarStatementInAmbientContext(node) {
+            if (ts.isInAmbientContext(node)) {
+                // An accessors is already reported about the ambient context
+                if (isAccessor(node.parent.kind)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = true;
+                }
+                // Find containing block which is either Block, ModuleBlock, SourceFile
+                var links = getNodeLinks(node);
+                if (!links.hasReportedStatementInAmbientContext && ts.isFunctionLike(node.parent)) {
+                    return getNodeLinks(node).hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.An_implementation_cannot_be_declared_in_ambient_contexts);
+                }
+                // We are either parented by another statement, or some sort of block.
+                // If we're in a block, we only want to really report an error once
+                // to prevent noisiness.  So use a bit on the block to indicate if
+                // this has already been reported, and don't report if it has.
+                //
+                if (node.parent.kind === 199 /* Block */ || node.parent.kind === 226 /* ModuleBlock */ || node.parent.kind === 256 /* SourceFile */) {
+                    var links_1 = getNodeLinks(node.parent);
+                    // Check if the containing block ever report this error
+                    if (!links_1.hasReportedStatementInAmbientContext) {
+                        return links_1.hasReportedStatementInAmbientContext = grammarErrorOnFirstToken(node, ts.Diagnostics.Statements_are_not_allowed_in_ambient_contexts);
+                    }
+                }
+                else {
+                }
+            }
+        }
+        function checkGrammarNumericLiteral(node) {
+            // Grammar checking
+            if (node.isOctalLiteral && languageVersion >= 1 /* ES5 */) {
+                return grammarErrorOnNode(node, ts.Diagnostics.Octal_literals_are_not_available_when_targeting_ECMAScript_5_and_higher);
+            }
+        }
+        function grammarErrorAfterFirstToken(node, message, arg0, arg1, arg2) {
+            var sourceFile = ts.getSourceFileOfNode(node);
+            if (!hasParseDiagnostics(sourceFile)) {
+                var span = ts.getSpanOfTokenAtPosition(sourceFile, node.pos);
+                diagnostics.add(ts.createFileDiagnostic(sourceFile, ts.textSpanEnd(span), /*length*/ 0, message, arg0, arg1, arg2));
+                return true;
+            }
+        }
+        var _a;
+    }
+    ts.createTypeChecker = createTypeChecker;
+})(ts || (ts = {}));
+/// <reference path="checker.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var nullSourceMapWriter;
+    // Used for initialize lastEncodedSourceMapSpan and reset lastEncodedSourceMapSpan when updateLastEncodedAndRecordedSpans
+    var defaultLastEncodedSourceMapSpan = {
+        emittedLine: 1,
+        emittedColumn: 1,
+        sourceLine: 1,
+        sourceColumn: 1,
+        sourceIndex: 0
+    };
+    function getNullSourceMapWriter() {
+        if (nullSourceMapWriter === undefined) {
+            nullSourceMapWriter = {
+                getSourceMapData: function () { return undefined; },
+                setSourceFile: function (sourceFile) { },
+                emitStart: function (range) { },
+                emitEnd: function (range, stopOverridingSpan) { },
+                emitPos: function (pos) { },
+                changeEmitSourcePos: function () { },
+                getText: function () { return undefined; },
+                getSourceMappingURL: function () { return undefined; },
+                initialize: function (filePath, sourceMapFilePath, sourceFiles, isBundledEmit) { },
+                reset: function () { }
+            };
+        }
+        return nullSourceMapWriter;
+    }
+    ts.getNullSourceMapWriter = getNullSourceMapWriter;
+    function createSourceMapWriter(host, writer) {
+        var compilerOptions = host.getCompilerOptions();
+        var currentSourceFile;
+        var sourceMapDir; // The directory in which sourcemap will be
+        var stopOverridingSpan = false;
+        var modifyLastSourcePos = false;
+        // Current source map file and its index in the sources list
+        var sourceMapSourceIndex;
+        // Last recorded and encoded spans
+        var lastRecordedSourceMapSpan;
+        var lastEncodedSourceMapSpan;
+        var lastEncodedNameIndex;
+        // Source map data
+        var sourceMapData;
+        return {
+            getSourceMapData: function () { return sourceMapData; },
+            setSourceFile: setSourceFile,
+            emitPos: emitPos,
+            emitStart: emitStart,
+            emitEnd: emitEnd,
+            changeEmitSourcePos: changeEmitSourcePos,
+            getText: getText,
+            getSourceMappingURL: getSourceMappingURL,
+            initialize: initialize,
+            reset: reset
+        };
+        function initialize(filePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
+            if (sourceMapData) {
+                reset();
+            }
+            currentSourceFile = undefined;
+            // Current source map file and its index in the sources list
+            sourceMapSourceIndex = -1;
+            // Last recorded and encoded spans
+            lastRecordedSourceMapSpan = undefined;
+            lastEncodedSourceMapSpan = defaultLastEncodedSourceMapSpan;
+            lastEncodedNameIndex = 0;
+            // Initialize source map data
+            sourceMapData = {
+                sourceMapFilePath: sourceMapFilePath,
+                jsSourceMappingURL: !compilerOptions.inlineSourceMap ? ts.getBaseFileName(ts.normalizeSlashes(sourceMapFilePath)) : undefined,
+                sourceMapFile: ts.getBaseFileName(ts.normalizeSlashes(filePath)),
+                sourceMapSourceRoot: compilerOptions.sourceRoot || "",
+                sourceMapSources: [],
+                inputSourceFileNames: [],
+                sourceMapNames: [],
+                sourceMapMappings: "",
+                sourceMapSourcesContent: compilerOptions.inlineSources ? [] : undefined,
+                sourceMapDecodedMappings: []
+            };
+            // Normalize source root and make sure it has trailing "/" so that it can be used to combine paths with the
+            // relative paths of the sources list in the sourcemap
+            sourceMapData.sourceMapSourceRoot = ts.normalizeSlashes(sourceMapData.sourceMapSourceRoot);
+            if (sourceMapData.sourceMapSourceRoot.length && sourceMapData.sourceMapSourceRoot.charCodeAt(sourceMapData.sourceMapSourceRoot.length - 1) !== 47 /* slash */) {
+                sourceMapData.sourceMapSourceRoot += ts.directorySeparator;
+            }
+            if (compilerOptions.mapRoot) {
+                sourceMapDir = ts.normalizeSlashes(compilerOptions.mapRoot);
+                if (!isBundledEmit) {
+                    ts.Debug.assert(sourceFiles.length === 1);
+                    // For modules or multiple emit files the mapRoot will have directory structure like the sources
+                    // So if src\a.ts and src\lib\b.ts are compiled together user would be moving the maps into mapRoot\a.js.map and mapRoot\lib\b.js.map
+                    sourceMapDir = ts.getDirectoryPath(ts.getSourceFilePathInNewDir(sourceFiles[0], host, sourceMapDir));
+                }
+                if (!ts.isRootedDiskPath(sourceMapDir) && !ts.isUrl(sourceMapDir)) {
+                    // The relative paths are relative to the common directory
+                    sourceMapDir = ts.combinePaths(host.getCommonSourceDirectory(), sourceMapDir);
+                    sourceMapData.jsSourceMappingURL = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizePath(filePath)), // get the relative sourceMapDir path based on jsFilePath
+                    ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL), // this is where user expects to see sourceMap
+                    host.getCurrentDirectory(), host.getCanonicalFileName, 
+                    /*isAbsolutePathAnUrl*/ true);
+                }
+                else {
+                    sourceMapData.jsSourceMappingURL = ts.combinePaths(sourceMapDir, sourceMapData.jsSourceMappingURL);
+                }
+            }
+            else {
+                sourceMapDir = ts.getDirectoryPath(ts.normalizePath(filePath));
+            }
+        }
+        function reset() {
+            currentSourceFile = undefined;
+            sourceMapDir = undefined;
+            sourceMapSourceIndex = undefined;
+            lastRecordedSourceMapSpan = undefined;
+            lastEncodedSourceMapSpan = undefined;
+            lastEncodedNameIndex = undefined;
+            sourceMapData = undefined;
+        }
+        function updateLastEncodedAndRecordedSpans() {
+            if (modifyLastSourcePos) {
+                // Reset the source pos
+                modifyLastSourcePos = false;
+                // Change Last recorded Map with last encoded emit line and character
+                lastRecordedSourceMapSpan.emittedLine = lastEncodedSourceMapSpan.emittedLine;
+                lastRecordedSourceMapSpan.emittedColumn = lastEncodedSourceMapSpan.emittedColumn;
+                // Pop sourceMapDecodedMappings to remove last entry
+                sourceMapData.sourceMapDecodedMappings.pop();
+                // Point the lastEncodedSourceMapSpace to the previous encoded sourceMapSpan
+                // If the list is empty which indicates that we are at the beginning of the file,
+                // we have to reset it to default value (same value when we first initialize sourceMapWriter)
+                lastEncodedSourceMapSpan = sourceMapData.sourceMapDecodedMappings.length ?
+                    sourceMapData.sourceMapDecodedMappings[sourceMapData.sourceMapDecodedMappings.length - 1] :
+                    defaultLastEncodedSourceMapSpan;
+                // TODO: Update lastEncodedNameIndex
+                // Since we dont support this any more, lets not worry about it right now.
+                // When we start supporting nameIndex, we will get back to this
+                // Change the encoded source map
+                var sourceMapMappings = sourceMapData.sourceMapMappings;
+                var lenthToSet = sourceMapMappings.length - 1;
+                for (; lenthToSet >= 0; lenthToSet--) {
+                    var currentChar = sourceMapMappings.charAt(lenthToSet);
+                    if (currentChar === ",") {
+                        // Separator for the entry found
+                        break;
+                    }
+                    if (currentChar === ";" && lenthToSet !== 0 && sourceMapMappings.charAt(lenthToSet - 1) !== ";") {
+                        // Last line separator found
+                        break;
+                    }
+                }
+                sourceMapData.sourceMapMappings = sourceMapMappings.substr(0, Math.max(0, lenthToSet));
+            }
+        }
+        // Encoding for sourcemap span
+        function encodeLastRecordedSourceMapSpan() {
+            if (!lastRecordedSourceMapSpan || lastRecordedSourceMapSpan === lastEncodedSourceMapSpan) {
+                return;
+            }
+            var prevEncodedEmittedColumn = lastEncodedSourceMapSpan.emittedColumn;
+            // Line/Comma delimiters
+            if (lastEncodedSourceMapSpan.emittedLine === lastRecordedSourceMapSpan.emittedLine) {
+                // Emit comma to separate the entry
+                if (sourceMapData.sourceMapMappings) {
+                    sourceMapData.sourceMapMappings += ",";
+                }
+            }
+            else {
+                // Emit line delimiters
+                for (var encodedLine = lastEncodedSourceMapSpan.emittedLine; encodedLine < lastRecordedSourceMapSpan.emittedLine; encodedLine++) {
+                    sourceMapData.sourceMapMappings += ";";
+                }
+                prevEncodedEmittedColumn = 1;
+            }
+            // 1. Relative Column 0 based
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.emittedColumn - prevEncodedEmittedColumn);
+            // 2. Relative sourceIndex
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceIndex - lastEncodedSourceMapSpan.sourceIndex);
+            // 3. Relative sourceLine 0 based
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceLine - lastEncodedSourceMapSpan.sourceLine);
+            // 4. Relative sourceColumn 0 based
+            sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.sourceColumn - lastEncodedSourceMapSpan.sourceColumn);
+            // 5. Relative namePosition 0 based
+            if (lastRecordedSourceMapSpan.nameIndex >= 0) {
+                ts.Debug.assert(false, "We do not support name index right now, Make sure to update updateLastEncodedAndRecordedSpans when we start using this");
+                sourceMapData.sourceMapMappings += base64VLQFormatEncode(lastRecordedSourceMapSpan.nameIndex - lastEncodedNameIndex);
+                lastEncodedNameIndex = lastRecordedSourceMapSpan.nameIndex;
+            }
+            lastEncodedSourceMapSpan = lastRecordedSourceMapSpan;
+            sourceMapData.sourceMapDecodedMappings.push(lastEncodedSourceMapSpan);
+        }
+        function emitPos(pos) {
+            if (pos === -1) {
+                return;
+            }
+            var sourceLinePos = ts.getLineAndCharacterOfPosition(currentSourceFile, pos);
+            // Convert the location to be one-based.
+            sourceLinePos.line++;
+            sourceLinePos.character++;
+            var emittedLine = writer.getLine();
+            var emittedColumn = writer.getColumn();
+            // If this location wasn't recorded or the location in source is going backwards, record the span
+            if (!lastRecordedSourceMapSpan ||
+                lastRecordedSourceMapSpan.emittedLine !== emittedLine ||
+                lastRecordedSourceMapSpan.emittedColumn !== emittedColumn ||
+                (lastRecordedSourceMapSpan.sourceIndex === sourceMapSourceIndex &&
+                    (lastRecordedSourceMapSpan.sourceLine > sourceLinePos.line ||
+                        (lastRecordedSourceMapSpan.sourceLine === sourceLinePos.line && lastRecordedSourceMapSpan.sourceColumn > sourceLinePos.character)))) {
+                // Encode the last recordedSpan before assigning new
+                encodeLastRecordedSourceMapSpan();
+                // New span
+                lastRecordedSourceMapSpan = {
+                    emittedLine: emittedLine,
+                    emittedColumn: emittedColumn,
+                    sourceLine: sourceLinePos.line,
+                    sourceColumn: sourceLinePos.character,
+                    sourceIndex: sourceMapSourceIndex
+                };
+                stopOverridingSpan = false;
+            }
+            else if (!stopOverridingSpan) {
+                // Take the new pos instead since there is no change in emittedLine and column since last location
+                lastRecordedSourceMapSpan.sourceLine = sourceLinePos.line;
+                lastRecordedSourceMapSpan.sourceColumn = sourceLinePos.character;
+                lastRecordedSourceMapSpan.sourceIndex = sourceMapSourceIndex;
+            }
+            updateLastEncodedAndRecordedSpans();
+        }
+        function getStartPos(range) {
+            var rangeHasDecorators = !!range.decorators;
+            return range.pos !== -1 ? ts.skipTrivia(currentSourceFile.text, rangeHasDecorators ? range.decorators.end : range.pos) : -1;
+        }
+        function emitStart(range) {
+            emitPos(getStartPos(range));
+        }
+        function emitEnd(range, stopOverridingEnd) {
+            emitPos(range.end);
+            stopOverridingSpan = stopOverridingEnd;
+        }
+        function changeEmitSourcePos() {
+            ts.Debug.assert(!modifyLastSourcePos);
+            modifyLastSourcePos = true;
+        }
+        function setSourceFile(sourceFile) {
+            currentSourceFile = sourceFile;
+            // Add the file to tsFilePaths
+            // If sourceroot option: Use the relative path corresponding to the common directory path
+            // otherwise source locations relative to map file location
+            var sourcesDirectoryPath = compilerOptions.sourceRoot ? host.getCommonSourceDirectory() : sourceMapDir;
+            var source = ts.getRelativePathToDirectoryOrUrl(sourcesDirectoryPath, currentSourceFile.fileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
+            /*isAbsolutePathAnUrl*/ true);
+            sourceMapSourceIndex = ts.indexOf(sourceMapData.sourceMapSources, source);
+            if (sourceMapSourceIndex === -1) {
+                sourceMapSourceIndex = sourceMapData.sourceMapSources.length;
+                sourceMapData.sourceMapSources.push(source);
+                // The one that can be used from program to get the actual source file
+                sourceMapData.inputSourceFileNames.push(sourceFile.fileName);
+                if (compilerOptions.inlineSources) {
+                    sourceMapData.sourceMapSourcesContent.push(sourceFile.text);
+                }
+            }
+        }
+        function getText() {
+            encodeLastRecordedSourceMapSpan();
+            return ts.stringify({
+                version: 3,
+                file: sourceMapData.sourceMapFile,
+                sourceRoot: sourceMapData.sourceMapSourceRoot,
+                sources: sourceMapData.sourceMapSources,
+                names: sourceMapData.sourceMapNames,
+                mappings: sourceMapData.sourceMapMappings,
+                sourcesContent: sourceMapData.sourceMapSourcesContent
+            });
+        }
+        function getSourceMappingURL() {
+            if (compilerOptions.inlineSourceMap) {
+                // Encode the sourceMap into the sourceMap url
+                var base64SourceMapText = ts.convertToBase64(getText());
+                return sourceMapData.jsSourceMappingURL = "data:application/json;base64," + base64SourceMapText;
+            }
+            else {
+                return sourceMapData.jsSourceMappingURL;
+            }
+        }
+    }
+    ts.createSourceMapWriter = createSourceMapWriter;
+    var base64Chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+    function base64FormatEncode(inValue) {
+        if (inValue < 64) {
+            return base64Chars.charAt(inValue);
+        }
+        throw TypeError(inValue + ": not a 64 based value");
+    }
+    function base64VLQFormatEncode(inValue) {
+        // Add a new least significant bit that has the sign of the value.
+        // if negative number the least significant bit that gets added to the number has value 1
+        // else least significant bit value that gets added is 0
+        // eg. -1 changes to binary : 01 [1] => 3
+        //     +1 changes to binary : 01 [0] => 2
+        if (inValue < 0) {
+            inValue = ((-inValue) << 1) + 1;
+        }
+        else {
+            inValue = inValue << 1;
+        }
+        // Encode 5 bits at a time starting from least significant bits
+        var encodedStr = "";
+        do {
+            var currentDigit = inValue & 31; // 11111
+            inValue = inValue >> 5;
+            if (inValue > 0) {
+                // There are still more digits to decode, set the msb (6th bit)
+                currentDigit = currentDigit | 32;
+            }
+            encodedStr = encodedStr + base64FormatEncode(currentDigit);
+        } while (inValue > 0);
+        return encodedStr;
+    }
+})(ts || (ts = {}));
+/// <reference path="checker.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    function getDeclarationDiagnostics(host, resolver, targetSourceFile) {
+        var declarationDiagnostics = ts.createDiagnosticCollection();
+        ts.forEachExpectedEmitFile(host, getDeclarationDiagnosticsFromFile, targetSourceFile);
+        return declarationDiagnostics.getDiagnostics(targetSourceFile ? targetSourceFile.fileName : undefined);
+        function getDeclarationDiagnosticsFromFile(_a, sources, isBundledEmit) {
+            var declarationFilePath = _a.declarationFilePath;
+            emitDeclarations(host, resolver, declarationDiagnostics, declarationFilePath, sources, isBundledEmit);
+        }
+    }
+    ts.getDeclarationDiagnostics = getDeclarationDiagnostics;
+    function emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit) {
+        var newLine = host.getNewLine();
+        var compilerOptions = host.getCompilerOptions();
+        var write;
+        var writeLine;
+        var increaseIndent;
+        var decreaseIndent;
+        var writeTextOfNode;
+        var writer;
+        createAndSetNewTextWriterWithSymbolWriter();
+        var enclosingDeclaration;
+        var resultHasExternalModuleIndicator;
+        var currentText;
+        var currentLineMap;
+        var currentIdentifiers;
+        var isCurrentFileExternalModule;
+        var reportedDeclarationError = false;
+        var errorNameNode;
+        var emitJsDocComments = compilerOptions.removeComments ? function (declaration) { } : writeJsDocComments;
+        var emit = compilerOptions.stripInternal ? stripInternal : emitNode;
+        var noDeclare;
+        var moduleElementDeclarationEmitInfo = [];
+        var asynchronousSubModuleDeclarationEmitInfo;
+        // Contains the reference paths that needs to go in the declaration file.
+        // Collecting this separately because reference paths need to be first thing in the declaration file
+        // and we could be collecting these paths from multiple files into single one with --out option
+        var referencesOutput = "";
+        var usedTypeDirectiveReferences;
+        // Emit references corresponding to each file
+        var emittedReferencedFiles = [];
+        var addedGlobalFileReference = false;
+        var allSourcesModuleElementDeclarationEmitInfo = [];
+        ts.forEach(sourceFiles, function (sourceFile) {
+            // Dont emit for javascript file
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                return;
+            }
+            // Check what references need to be added
+            if (!compilerOptions.noResolve) {
+                ts.forEach(sourceFile.referencedFiles, function (fileReference) {
+                    var referencedFile = ts.tryResolveScriptReference(host, sourceFile, fileReference);
+                    // Emit reference in dts, if the file reference was not already emitted
+                    if (referencedFile && !ts.contains(emittedReferencedFiles, referencedFile)) {
+                        // Add a reference to generated dts file,
+                        // global file reference is added only
+                        //  - if it is not bundled emit (because otherwise it would be self reference)
+                        //  - and it is not already added
+                        if (writeReferencePath(referencedFile, !isBundledEmit && !addedGlobalFileReference)) {
+                            addedGlobalFileReference = true;
+                        }
+                        emittedReferencedFiles.push(referencedFile);
+                    }
+                });
+            }
+            resultHasExternalModuleIndicator = false;
+            if (!isBundledEmit || !ts.isExternalModule(sourceFile)) {
+                noDeclare = false;
+                emitSourceFile(sourceFile);
+            }
+            else if (ts.isExternalModule(sourceFile)) {
+                noDeclare = true;
+                write("declare module \"" + ts.getResolvedExternalModuleName(host, sourceFile) + "\" {");
+                writeLine();
+                increaseIndent();
+                emitSourceFile(sourceFile);
+                decreaseIndent();
+                write("}");
+                writeLine();
+            }
+            // create asynchronous output for the importDeclarations
+            if (moduleElementDeclarationEmitInfo.length) {
+                var oldWriter = writer;
+                ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                    if (aliasEmitInfo.isVisible && !aliasEmitInfo.asynchronousOutput) {
+                        ts.Debug.assert(aliasEmitInfo.node.kind === 230 /* ImportDeclaration */);
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        ts.Debug.assert(aliasEmitInfo.indent === 0 || (aliasEmitInfo.indent === 1 && isBundledEmit));
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            increaseIndent();
+                        }
+                        writeImportDeclaration(aliasEmitInfo.node);
+                        aliasEmitInfo.asynchronousOutput = writer.getText();
+                        for (var i = 0; i < aliasEmitInfo.indent; i++) {
+                            decreaseIndent();
+                        }
+                    }
+                });
+                setWriter(oldWriter);
+                allSourcesModuleElementDeclarationEmitInfo = allSourcesModuleElementDeclarationEmitInfo.concat(moduleElementDeclarationEmitInfo);
+                moduleElementDeclarationEmitInfo = [];
+            }
+            if (!isBundledEmit && ts.isExternalModule(sourceFile) && sourceFile.moduleAugmentations.length && !resultHasExternalModuleIndicator) {
+                // if file was external module with augmentations - this fact should be preserved in .d.ts as well.
+                // in case if we didn't write any external module specifiers in .d.ts we need to emit something
+                // that will force compiler to think that this file is an external module - 'export {}' is a reasonable choice here.
+                write("export {};");
+                writeLine();
+            }
+        });
+        if (usedTypeDirectiveReferences) {
+            for (var directive in usedTypeDirectiveReferences) {
+                if (ts.hasProperty(usedTypeDirectiveReferences, directive)) {
+                    referencesOutput += "/// <reference types=\"" + directive + "\" />" + newLine;
+                }
+            }
+        }
+        return {
+            reportedDeclarationError: reportedDeclarationError,
+            moduleElementDeclarationEmitInfo: allSourcesModuleElementDeclarationEmitInfo,
+            synchronousDeclarationOutput: writer.getText(),
+            referencesOutput: referencesOutput
+        };
+        function hasInternalAnnotation(range) {
+            var comment = currentText.substring(range.pos, range.end);
+            return comment.indexOf("@internal") >= 0;
+        }
+        function stripInternal(node) {
+            if (node) {
+                var leadingCommentRanges = ts.getLeadingCommentRanges(currentText, node.pos);
+                if (ts.forEach(leadingCommentRanges, hasInternalAnnotation)) {
+                    return;
+                }
+                emitNode(node);
+            }
+        }
+        function createAndSetNewTextWriterWithSymbolWriter() {
+            var writer = ts.createTextWriter(newLine);
+            writer.trackSymbol = trackSymbol;
+            writer.reportInaccessibleThisError = reportInaccessibleThisError;
+            writer.writeKeyword = writer.write;
+            writer.writeOperator = writer.write;
+            writer.writePunctuation = writer.write;
+            writer.writeSpace = writer.write;
+            writer.writeStringLiteral = writer.writeLiteral;
+            writer.writeParameter = writer.write;
+            writer.writeSymbol = writer.write;
+            setWriter(writer);
+        }
+        function setWriter(newWriter) {
+            writer = newWriter;
+            write = newWriter.write;
+            writeTextOfNode = newWriter.writeTextOfNode;
+            writeLine = newWriter.writeLine;
+            increaseIndent = newWriter.increaseIndent;
+            decreaseIndent = newWriter.decreaseIndent;
+        }
+        function writeAsynchronousModuleElements(nodes) {
+            var oldWriter = writer;
+            ts.forEach(nodes, function (declaration) {
+                var nodeToCheck;
+                if (declaration.kind === 218 /* VariableDeclaration */) {
+                    nodeToCheck = declaration.parent.parent;
+                }
+                else if (declaration.kind === 233 /* NamedImports */ || declaration.kind === 234 /* ImportSpecifier */ || declaration.kind === 231 /* ImportClause */) {
+                    ts.Debug.fail("We should be getting ImportDeclaration instead to write");
+                }
+                else {
+                    nodeToCheck = declaration;
+                }
+                var moduleElementEmitInfo = ts.forEach(moduleElementDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
+                if (!moduleElementEmitInfo && asynchronousSubModuleDeclarationEmitInfo) {
+                    moduleElementEmitInfo = ts.forEach(asynchronousSubModuleDeclarationEmitInfo, function (declEmitInfo) { return declEmitInfo.node === nodeToCheck ? declEmitInfo : undefined; });
+                }
+                // If the alias was marked as not visible when we saw its declaration, we would have saved the aliasEmitInfo, but if we haven't yet visited the alias declaration
+                // then we don't need to write it at this point. We will write it when we actually see its declaration
+                // Eg.
+                // export function bar(a: foo.Foo) { }
+                // import foo = require("foo");
+                // Writing of function bar would mark alias declaration foo as visible but we haven't yet visited that declaration so do nothing,
+                // we would write alias foo declaration when we visit it since it would now be marked as visible
+                if (moduleElementEmitInfo) {
+                    if (moduleElementEmitInfo.node.kind === 230 /* ImportDeclaration */) {
+                        // we have to create asynchronous output only after we have collected complete information
+                        // because it is possible to enable multiple bindings as asynchronously visible
+                        moduleElementEmitInfo.isVisible = true;
+                    }
+                    else {
+                        createAndSetNewTextWriterWithSymbolWriter();
+                        for (var declarationIndent = moduleElementEmitInfo.indent; declarationIndent; declarationIndent--) {
+                            increaseIndent();
+                        }
+                        if (nodeToCheck.kind === 225 /* ModuleDeclaration */) {
+                            ts.Debug.assert(asynchronousSubModuleDeclarationEmitInfo === undefined);
+                            asynchronousSubModuleDeclarationEmitInfo = [];
+                        }
+                        writeModuleElement(nodeToCheck);
+                        if (nodeToCheck.kind === 225 /* ModuleDeclaration */) {
+                            moduleElementEmitInfo.subModuleElementDeclarationEmitInfo = asynchronousSubModuleDeclarationEmitInfo;
+                            asynchronousSubModuleDeclarationEmitInfo = undefined;
+                        }
+                        moduleElementEmitInfo.asynchronousOutput = writer.getText();
+                    }
+                }
+            });
+            setWriter(oldWriter);
+        }
+        function recordTypeReferenceDirectivesIfNecessary(typeReferenceDirectives) {
+            if (!typeReferenceDirectives) {
+                return;
+            }
+            if (!usedTypeDirectiveReferences) {
+                usedTypeDirectiveReferences = {};
+            }
+            for (var _i = 0, typeReferenceDirectives_1 = typeReferenceDirectives; _i < typeReferenceDirectives_1.length; _i++) {
+                var directive = typeReferenceDirectives_1[_i];
+                if (!ts.hasProperty(usedTypeDirectiveReferences, directive)) {
+                    usedTypeDirectiveReferences[directive] = directive;
+                }
+            }
+        }
+        function handleSymbolAccessibilityError(symbolAccessibilityResult) {
+            if (symbolAccessibilityResult.accessibility === 0 /* Accessible */) {
+                // write the aliases
+                if (symbolAccessibilityResult && symbolAccessibilityResult.aliasesToMakeVisible) {
+                    writeAsynchronousModuleElements(symbolAccessibilityResult.aliasesToMakeVisible);
+                }
+            }
+            else {
+                // Report error
+                reportedDeclarationError = true;
+                var errorInfo = writer.getSymbolAccessibilityDiagnostic(symbolAccessibilityResult);
+                if (errorInfo) {
+                    if (errorInfo.typeName) {
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, ts.getTextOfNodeFromSourceText(currentText, errorInfo.typeName), symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
+                    }
+                    else {
+                        emitterDiagnostics.add(ts.createDiagnosticForNode(symbolAccessibilityResult.errorNode || errorInfo.errorNode, errorInfo.diagnosticMessage, symbolAccessibilityResult.errorSymbolName, symbolAccessibilityResult.errorModuleName));
+                    }
+                }
+            }
+        }
+        function trackSymbol(symbol, enclosingDeclaration, meaning) {
+            handleSymbolAccessibilityError(resolver.isSymbolAccessible(symbol, enclosingDeclaration, meaning));
+            recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForSymbol(symbol, meaning));
+        }
+        function reportInaccessibleThisError() {
+            if (errorNameNode) {
+                reportedDeclarationError = true;
+                emitterDiagnostics.add(ts.createDiagnosticForNode(errorNameNode, ts.Diagnostics.The_inferred_type_of_0_references_an_inaccessible_this_type_A_type_annotation_is_necessary, ts.declarationNameToString(errorNameNode)));
+            }
+        }
+        function writeTypeOfDeclaration(declaration, type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            if (type) {
+                // Write the type
+                emitType(type);
+            }
+            else {
+                errorNameNode = declaration.name;
+                resolver.writeTypeOfDeclaration(declaration, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
+                errorNameNode = undefined;
+            }
+        }
+        function writeReturnTypeAtSignature(signature, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            write(": ");
+            if (signature.type) {
+                // Write the type
+                emitType(signature.type);
+            }
+            else {
+                errorNameNode = signature.name;
+                resolver.writeReturnTypeOfSignatureDeclaration(signature, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
+                errorNameNode = undefined;
+            }
+        }
+        function emitLines(nodes) {
+            for (var _i = 0, nodes_2 = nodes; _i < nodes_2.length; _i++) {
+                var node = nodes_2[_i];
+                emit(node);
+            }
+        }
+        function emitSeparatedList(nodes, separator, eachNodeEmitFn, canEmitFn) {
+            var currentWriterPos = writer.getTextPos();
+            for (var _i = 0, nodes_3 = nodes; _i < nodes_3.length; _i++) {
+                var node = nodes_3[_i];
+                if (!canEmitFn || canEmitFn(node)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        write(separator);
+                    }
+                    currentWriterPos = writer.getTextPos();
+                    eachNodeEmitFn(node);
+                }
+            }
+        }
+        function emitCommaList(nodes, eachNodeEmitFn, canEmitFn) {
+            emitSeparatedList(nodes, ", ", eachNodeEmitFn, canEmitFn);
+        }
+        function writeJsDocComments(declaration) {
+            if (declaration) {
+                var jsDocComments = ts.getJsDocCommentsFromText(declaration, currentText);
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, declaration, jsDocComments);
+                // jsDoc comments are emitted at /*leading comment1 */space/*leading comment*/space
+                ts.emitComments(currentText, currentLineMap, writer, jsDocComments, /*trailingSeparator*/ true, newLine, ts.writeCommentRange);
+            }
+        }
+        function emitTypeWithNewGetSymbolAccessibilityDiagnostic(type, getSymbolAccessibilityDiagnostic) {
+            writer.getSymbolAccessibilityDiagnostic = getSymbolAccessibilityDiagnostic;
+            emitType(type);
+        }
+        function emitType(type) {
+            switch (type.kind) {
+                case 117 /* AnyKeyword */:
+                case 132 /* StringKeyword */:
+                case 130 /* NumberKeyword */:
+                case 120 /* BooleanKeyword */:
+                case 133 /* SymbolKeyword */:
+                case 103 /* VoidKeyword */:
+                case 135 /* UndefinedKeyword */:
+                case 93 /* NullKeyword */:
+                case 127 /* NeverKeyword */:
+                case 165 /* ThisType */:
+                case 166 /* StringLiteralType */:
+                    return writeTextOfNode(currentText, type);
+                case 194 /* ExpressionWithTypeArguments */:
+                    return emitExpressionWithTypeArguments(type);
+                case 155 /* TypeReference */:
+                    return emitTypeReference(type);
+                case 158 /* TypeQuery */:
+                    return emitTypeQuery(type);
+                case 160 /* ArrayType */:
+                    return emitArrayType(type);
+                case 161 /* TupleType */:
+                    return emitTupleType(type);
+                case 162 /* UnionType */:
+                    return emitUnionType(type);
+                case 163 /* IntersectionType */:
+                    return emitIntersectionType(type);
+                case 164 /* ParenthesizedType */:
+                    return emitParenType(type);
+                case 156 /* FunctionType */:
+                case 157 /* ConstructorType */:
+                    return emitSignatureDeclarationWithJsDocComments(type);
+                case 159 /* TypeLiteral */:
+                    return emitTypeLiteral(type);
+                case 69 /* Identifier */:
+                    return emitEntityName(type);
+                case 139 /* QualifiedName */:
+                    return emitEntityName(type);
+                case 154 /* TypePredicate */:
+                    return emitTypePredicate(type);
+            }
+            function writeEntityName(entityName) {
+                if (entityName.kind === 69 /* Identifier */) {
+                    writeTextOfNode(currentText, entityName);
+                }
+                else {
+                    var left = entityName.kind === 139 /* QualifiedName */ ? entityName.left : entityName.expression;
+                    var right = entityName.kind === 139 /* QualifiedName */ ? entityName.right : entityName.name;
+                    writeEntityName(left);
+                    write(".");
+                    writeTextOfNode(currentText, right);
+                }
+            }
+            function emitEntityName(entityName) {
+                var visibilityResult = resolver.isEntityNameVisible(entityName, 
+                // Aliases can be written asynchronously so use correct enclosing declaration
+                entityName.parent.kind === 229 /* ImportEqualsDeclaration */ ? entityName.parent : enclosingDeclaration);
+                handleSymbolAccessibilityError(visibilityResult);
+                recordTypeReferenceDirectivesIfNecessary(resolver.getTypeReferenceDirectivesForEntityName(entityName));
+                writeEntityName(entityName);
+            }
+            function emitExpressionWithTypeArguments(node) {
+                if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                    ts.Debug.assert(node.expression.kind === 69 /* Identifier */ || node.expression.kind === 172 /* PropertyAccessExpression */);
+                    emitEntityName(node.expression);
+                    if (node.typeArguments) {
+                        write("<");
+                        emitCommaList(node.typeArguments, emitType);
+                        write(">");
+                    }
+                }
+            }
+            function emitTypeReference(type) {
+                emitEntityName(type.typeName);
+                if (type.typeArguments) {
+                    write("<");
+                    emitCommaList(type.typeArguments, emitType);
+                    write(">");
+                }
+            }
+            function emitTypePredicate(type) {
+                writeTextOfNode(currentText, type.parameterName);
+                write(" is ");
+                emitType(type.type);
+            }
+            function emitTypeQuery(type) {
+                write("typeof ");
+                emitEntityName(type.exprName);
+            }
+            function emitArrayType(type) {
+                emitType(type.elementType);
+                write("[]");
+            }
+            function emitTupleType(type) {
+                write("[");
+                emitCommaList(type.elementTypes, emitType);
+                write("]");
+            }
+            function emitUnionType(type) {
+                emitSeparatedList(type.types, " | ", emitType);
+            }
+            function emitIntersectionType(type) {
+                emitSeparatedList(type.types, " & ", emitType);
+            }
+            function emitParenType(type) {
+                write("(");
+                emitType(type.type);
+                write(")");
+            }
+            function emitTypeLiteral(type) {
+                write("{");
+                if (type.members.length) {
+                    writeLine();
+                    increaseIndent();
+                    // write members
+                    emitLines(type.members);
+                    decreaseIndent();
+                }
+                write("}");
+            }
+        }
+        function emitSourceFile(node) {
+            currentText = node.text;
+            currentLineMap = ts.getLineStarts(node);
+            currentIdentifiers = node.identifiers;
+            isCurrentFileExternalModule = ts.isExternalModule(node);
+            enclosingDeclaration = node;
+            ts.emitDetachedComments(currentText, currentLineMap, writer, ts.writeCommentRange, node, newLine, true /* remove comments */);
+            emitLines(node.statements);
+        }
+        // Return a temp variable name to be used in `export default` statements.
+        // The temp name will be of the form _default_counter.
+        // Note that export default is only allowed at most once in a module, so we
+        // do not need to keep track of created temp names.
+        function getExportDefaultTempVariableName() {
+            var baseName = "_default";
+            if (!ts.hasProperty(currentIdentifiers, baseName)) {
+                return baseName;
+            }
+            var count = 0;
+            while (true) {
+                count++;
+                var name_23 = baseName + "_" + count;
+                if (!ts.hasProperty(currentIdentifiers, name_23)) {
+                    return name_23;
+                }
+            }
+        }
+        function emitExportAssignment(node) {
+            if (node.expression.kind === 69 /* Identifier */) {
+                write(node.isExportEquals ? "export = " : "export default ");
+                writeTextOfNode(currentText, node.expression);
+            }
+            else {
+                // Expression
+                var tempVarName = getExportDefaultTempVariableName();
+                if (!noDeclare) {
+                    write("declare ");
+                }
+                write("var ");
+                write(tempVarName);
+                write(": ");
+                writer.getSymbolAccessibilityDiagnostic = getDefaultExportAccessibilityDiagnostic;
+                resolver.writeTypeOfExpression(node.expression, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
+                write(";");
+                writeLine();
+                write(node.isExportEquals ? "export = " : "export default ");
+                write(tempVarName);
+            }
+            write(";");
+            writeLine();
+            // Make all the declarations visible for the export name
+            if (node.expression.kind === 69 /* Identifier */) {
+                var nodes = resolver.collectLinkedAliases(node.expression);
+                // write each of these declarations asynchronously
+                writeAsynchronousModuleElements(nodes);
+            }
+            function getDefaultExportAccessibilityDiagnostic(diagnostic) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Default_export_of_the_module_has_or_is_using_private_name_0,
+                    errorNode: node
+                };
+            }
+        }
+        function isModuleElementVisible(node) {
+            return resolver.isDeclarationVisible(node);
+        }
+        function emitModuleElement(node, isModuleElementVisible) {
+            if (isModuleElementVisible) {
+                writeModuleElement(node);
+            }
+            else if (node.kind === 229 /* ImportEqualsDeclaration */ ||
+                (node.parent.kind === 256 /* SourceFile */ && isCurrentFileExternalModule)) {
+                var isVisible = void 0;
+                if (asynchronousSubModuleDeclarationEmitInfo && node.parent.kind !== 256 /* SourceFile */) {
+                    // Import declaration of another module that is visited async so lets put it in right spot
+                    asynchronousSubModuleDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
+                else {
+                    if (node.kind === 230 /* ImportDeclaration */) {
+                        var importDeclaration = node;
+                        if (importDeclaration.importClause) {
+                            isVisible = (importDeclaration.importClause.name && resolver.isDeclarationVisible(importDeclaration.importClause)) ||
+                                isVisibleNamedBinding(importDeclaration.importClause.namedBindings);
+                        }
+                    }
+                    moduleElementDeclarationEmitInfo.push({
+                        node: node,
+                        outputPos: writer.getTextPos(),
+                        indent: writer.getIndent(),
+                        isVisible: isVisible
+                    });
+                }
+            }
+        }
+        function writeModuleElement(node) {
+            switch (node.kind) {
+                case 220 /* FunctionDeclaration */:
+                    return writeFunctionDeclaration(node);
+                case 200 /* VariableStatement */:
+                    return writeVariableStatement(node);
+                case 222 /* InterfaceDeclaration */:
+                    return writeInterfaceDeclaration(node);
+                case 221 /* ClassDeclaration */:
+                    return writeClassDeclaration(node);
+                case 223 /* TypeAliasDeclaration */:
+                    return writeTypeAliasDeclaration(node);
+                case 224 /* EnumDeclaration */:
+                    return writeEnumDeclaration(node);
+                case 225 /* ModuleDeclaration */:
+                    return writeModuleDeclaration(node);
+                case 229 /* ImportEqualsDeclaration */:
+                    return writeImportEqualsDeclaration(node);
+                case 230 /* ImportDeclaration */:
+                    return writeImportDeclaration(node);
+                default:
+                    ts.Debug.fail("Unknown symbol kind");
+            }
+        }
+        function emitModuleElementDeclarationFlags(node) {
+            // If the node is parented in the current source file we need to emit export declare or just export
+            if (node.parent.kind === 256 /* SourceFile */) {
+                // If the node is exported
+                if (node.flags & 1 /* Export */) {
+                    write("export ");
+                }
+                if (node.flags & 512 /* Default */) {
+                    write("default ");
+                }
+                else if (node.kind !== 222 /* InterfaceDeclaration */ && !noDeclare) {
+                    write("declare ");
+                }
+            }
+        }
+        function emitClassMemberDeclarationFlags(flags) {
+            if (flags & 8 /* Private */) {
+                write("private ");
+            }
+            else if (flags & 16 /* Protected */) {
+                write("protected ");
+            }
+            if (flags & 32 /* Static */) {
+                write("static ");
+            }
+            if (flags & 64 /* Readonly */) {
+                write("readonly ");
+            }
+            if (flags & 128 /* Abstract */) {
+                write("abstract ");
+            }
+        }
+        function writeImportEqualsDeclaration(node) {
+            // note usage of writer. methods instead of aliases created, just to make sure we are using
+            // correct writer especially to handle asynchronous alias writing
+            emitJsDocComments(node);
+            if (node.flags & 1 /* Export */) {
+                write("export ");
+            }
+            write("import ");
+            writeTextOfNode(currentText, node.name);
+            write(" = ");
+            if (ts.isInternalModuleImportEqualsDeclaration(node)) {
+                emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.moduleReference, getImportEntityNameVisibilityError);
+                write(";");
+            }
+            else {
+                write("require(");
+                emitExternalModuleSpecifier(node);
+                write(");");
+            }
+            writer.writeLine();
+            function getImportEntityNameVisibilityError(symbolAccessibilityResult) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Import_declaration_0_is_using_private_name_1,
+                    errorNode: node,
+                    typeName: node.name
+                };
+            }
+        }
+        function isVisibleNamedBinding(namedBindings) {
+            if (namedBindings) {
+                if (namedBindings.kind === 232 /* NamespaceImport */) {
+                    return resolver.isDeclarationVisible(namedBindings);
+                }
+                else {
+                    return ts.forEach(namedBindings.elements, function (namedImport) { return resolver.isDeclarationVisible(namedImport); });
+                }
+            }
+        }
+        function writeImportDeclaration(node) {
+            emitJsDocComments(node);
+            if (node.flags & 1 /* Export */) {
+                write("export ");
+            }
+            write("import ");
+            if (node.importClause) {
+                var currentWriterPos = writer.getTextPos();
+                if (node.importClause.name && resolver.isDeclarationVisible(node.importClause)) {
+                    writeTextOfNode(currentText, node.importClause.name);
+                }
+                if (node.importClause.namedBindings && isVisibleNamedBinding(node.importClause.namedBindings)) {
+                    if (currentWriterPos !== writer.getTextPos()) {
+                        // If the default binding was emitted, write the separated
+                        write(", ");
+                    }
+                    if (node.importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                        write("* as ");
+                        writeTextOfNode(currentText, node.importClause.namedBindings.name);
+                    }
+                    else {
+                        write("{ ");
+                        emitCommaList(node.importClause.namedBindings.elements, emitImportOrExportSpecifier, resolver.isDeclarationVisible);
+                        write(" }");
+                    }
+                }
+                write(" from ");
+            }
+            emitExternalModuleSpecifier(node);
+            write(";");
+            writer.writeLine();
+        }
+        function emitExternalModuleSpecifier(parent) {
+            // emitExternalModuleSpecifier is usually called when we emit something in the.d.ts file that will make it an external module (i.e. import/export declarations).
+            // the only case when it is not true is when we call it to emit correct name for module augmentation - d.ts files with just module augmentations are not considered
+            // external modules since they are indistinguishable from script files with ambient modules. To fix this in such d.ts files we'll emit top level 'export {}'
+            // so compiler will treat them as external modules.
+            resultHasExternalModuleIndicator = resultHasExternalModuleIndicator || parent.kind !== 225 /* ModuleDeclaration */;
+            var moduleSpecifier;
+            if (parent.kind === 229 /* ImportEqualsDeclaration */) {
+                var node = parent;
+                moduleSpecifier = ts.getExternalModuleImportEqualsDeclarationExpression(node);
+            }
+            else if (parent.kind === 225 /* ModuleDeclaration */) {
+                moduleSpecifier = parent.name;
+            }
+            else {
+                var node = parent;
+                moduleSpecifier = node.moduleSpecifier;
+            }
+            if (moduleSpecifier.kind === 9 /* StringLiteral */ && isBundledEmit && (compilerOptions.out || compilerOptions.outFile)) {
+                var moduleName = ts.getExternalModuleNameFromDeclaration(host, resolver, parent);
+                if (moduleName) {
+                    write('"');
+                    write(moduleName);
+                    write('"');
+                    return;
+                }
+            }
+            writeTextOfNode(currentText, moduleSpecifier);
+        }
+        function emitImportOrExportSpecifier(node) {
+            if (node.propertyName) {
+                writeTextOfNode(currentText, node.propertyName);
+                write(" as ");
+            }
+            writeTextOfNode(currentText, node.name);
+        }
+        function emitExportSpecifier(node) {
+            emitImportOrExportSpecifier(node);
+            // Make all the declarations visible for the export name
+            var nodes = resolver.collectLinkedAliases(node.propertyName || node.name);
+            // write each of these declarations asynchronously
+            writeAsynchronousModuleElements(nodes);
+        }
+        function emitExportDeclaration(node) {
+            emitJsDocComments(node);
+            write("export ");
+            if (node.exportClause) {
+                write("{ ");
+                emitCommaList(node.exportClause.elements, emitExportSpecifier);
+                write(" }");
+            }
+            else {
+                write("*");
+            }
+            if (node.moduleSpecifier) {
+                write(" from ");
+                emitExternalModuleSpecifier(node);
+            }
+            write(";");
+            writer.writeLine();
+        }
+        function writeModuleDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isGlobalScopeAugmentation(node)) {
+                write("global ");
+            }
+            else {
+                if (node.flags & 4096 /* Namespace */) {
+                    write("namespace ");
+                }
+                else {
+                    write("module ");
+                }
+                if (ts.isExternalModuleAugmentation(node)) {
+                    emitExternalModuleSpecifier(node);
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
+                }
+            }
+            while (node.body.kind !== 226 /* ModuleBlock */) {
+                node = node.body;
+                write(".");
+                writeTextOfNode(currentText, node.name);
+            }
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.body.statements);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function writeTypeAliasDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("type ");
+            writeTextOfNode(currentText, node.name);
+            emitTypeParameters(node.typeParameters);
+            write(" = ");
+            emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.type, getTypeAliasDeclarationVisibilityError);
+            write(";");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+            function getTypeAliasDeclarationVisibilityError(symbolAccessibilityResult) {
+                return {
+                    diagnosticMessage: ts.Diagnostics.Exported_type_alias_0_has_or_is_using_private_name_1,
+                    errorNode: node.type,
+                    typeName: node.name
+                };
+            }
+        }
+        function writeEnumDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isConst(node)) {
+                write("const ");
+            }
+            write("enum ");
+            writeTextOfNode(currentText, node.name);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+        }
+        function emitEnumMemberDeclaration(node) {
+            emitJsDocComments(node);
+            writeTextOfNode(currentText, node.name);
+            var enumMemberValue = resolver.getConstantValue(node);
+            if (enumMemberValue !== undefined) {
+                write(" = ");
+                write(enumMemberValue.toString());
+            }
+            write(",");
+            writeLine();
+        }
+        function isPrivateMethodTypeParameter(node) {
+            return node.parent.kind === 147 /* MethodDeclaration */ && (node.parent.flags & 8 /* Private */);
+        }
+        function emitTypeParameters(typeParameters) {
+            function emitTypeParameter(node) {
+                increaseIndent();
+                emitJsDocComments(node);
+                decreaseIndent();
+                writeTextOfNode(currentText, node.name);
+                // If there is constraint present and this is not a type parameter of the private method emit the constraint
+                if (node.constraint && !isPrivateMethodTypeParameter(node)) {
+                    write(" extends ");
+                    if (node.parent.kind === 156 /* FunctionType */ ||
+                        node.parent.kind === 157 /* ConstructorType */ ||
+                        (node.parent.parent && node.parent.parent.kind === 159 /* TypeLiteral */)) {
+                        ts.Debug.assert(node.parent.kind === 147 /* MethodDeclaration */ ||
+                            node.parent.kind === 146 /* MethodSignature */ ||
+                            node.parent.kind === 156 /* FunctionType */ ||
+                            node.parent.kind === 157 /* ConstructorType */ ||
+                            node.parent.kind === 151 /* CallSignature */ ||
+                            node.parent.kind === 152 /* ConstructSignature */);
+                        emitType(node.constraint);
+                    }
+                    else {
+                        emitTypeWithNewGetSymbolAccessibilityDiagnostic(node.constraint, getTypeParameterConstraintVisibilityError);
+                    }
+                }
+                function getTypeParameterConstraintVisibilityError(symbolAccessibilityResult) {
+                    // Type parameter constraints are named by user so we should always be able to name it
+                    var diagnosticMessage;
+                    switch (node.parent.kind) {
+                        case 221 /* ClassDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_class_has_or_is_using_private_name_1;
+                            break;
+                        case 222 /* InterfaceDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 152 /* ConstructSignature */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 151 /* CallSignature */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                            break;
+                        case 147 /* MethodDeclaration */:
+                        case 146 /* MethodSignature */:
+                            if (node.parent.flags & 32 /* Static */) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                            }
+                            else {
+                                diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                            }
+                            break;
+                        case 220 /* FunctionDeclaration */:
+                            diagnosticMessage = ts.Diagnostics.Type_parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                            break;
+                        default:
+                            ts.Debug.fail("This is unknown parent for type parameter: " + node.parent.kind);
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: node.name
+                    };
+                }
+            }
+            if (typeParameters) {
+                write("<");
+                emitCommaList(typeParameters, emitTypeParameter);
+                write(">");
+            }
+        }
+        function emitHeritageClause(typeReferences, isImplementsList) {
+            if (typeReferences) {
+                write(isImplementsList ? " implements " : " extends ");
+                emitCommaList(typeReferences, emitTypeOfTypeReference);
+            }
+            function emitTypeOfTypeReference(node) {
+                if (ts.isSupportedExpressionWithTypeArguments(node)) {
+                    emitTypeWithNewGetSymbolAccessibilityDiagnostic(node, getHeritageClauseVisibilityError);
+                }
+                else if (!isImplementsList && node.expression.kind === 93 /* NullKeyword */) {
+                    write("null");
+                }
+                else {
+                    writer.getSymbolAccessibilityDiagnostic = getHeritageClauseVisibilityError;
+                    resolver.writeBaseConstructorTypeOfClass(enclosingDeclaration, enclosingDeclaration, 2 /* UseTypeOfFunction */, writer);
+                }
+                function getHeritageClauseVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage;
+                    // Heritage clause is written by user so it can always be named
+                    if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
+                        // Class or Interface implemented/extended is inaccessible
+                        diagnosticMessage = isImplementsList ?
+                            ts.Diagnostics.Implements_clause_of_exported_class_0_has_or_is_using_private_name_1 :
+                            ts.Diagnostics.Extends_clause_of_exported_class_0_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        // interface is inaccessible
+                        diagnosticMessage = ts.Diagnostics.Extends_clause_of_exported_interface_0_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: node,
+                        typeName: node.parent.parent.name
+                    };
+                }
+            }
+        }
+        function writeClassDeclaration(node) {
+            function emitParameterProperties(constructorDeclaration) {
+                if (constructorDeclaration) {
+                    ts.forEach(constructorDeclaration.parameters, function (param) {
+                        if (param.flags & 92 /* ParameterPropertyModifier */) {
+                            emitPropertyDeclaration(param);
+                        }
+                    });
+                }
+            }
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (node.flags & 128 /* Abstract */) {
+                write("abstract ");
+            }
+            write("class ");
+            writeTextOfNode(currentText, node.name);
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitTypeParameters(node.typeParameters);
+            var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+            if (baseTypeNode) {
+                emitHeritageClause([baseTypeNode], /*isImplementsList*/ false);
+            }
+            emitHeritageClause(ts.getClassImplementsHeritageClauseElements(node), /*isImplementsList*/ true);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitParameterProperties(ts.getFirstConstructorWithBody(node));
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function writeInterfaceDeclaration(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            write("interface ");
+            writeTextOfNode(currentText, node.name);
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            emitTypeParameters(node.typeParameters);
+            emitHeritageClause(ts.getInterfaceBaseTypeNodes(node), /*isImplementsList*/ false);
+            write(" {");
+            writeLine();
+            increaseIndent();
+            emitLines(node.members);
+            decreaseIndent();
+            write("}");
+            writeLine();
+            enclosingDeclaration = prevEnclosingDeclaration;
+        }
+        function emitPropertyDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            emitJsDocComments(node);
+            emitClassMemberDeclarationFlags(node.flags);
+            emitVariableDeclaration(node);
+            write(";");
+            writeLine();
+        }
+        function emitVariableDeclaration(node) {
+            // If we are emitting property it isn't moduleElement and hence we already know it needs to be emitted
+            // so there is no check needed to see if declaration is visible
+            if (node.kind !== 218 /* VariableDeclaration */ || resolver.isDeclarationVisible(node)) {
+                if (ts.isBindingPattern(node.name)) {
+                    emitBindingPattern(node.name);
+                }
+                else {
+                    // If this node is a computed name, it can only be a symbol, because we've already skipped
+                    // it if it's not a well known symbol. In that case, the text of the name will be exactly
+                    // what we want, namely the name expression enclosed in brackets.
+                    writeTextOfNode(currentText, node.name);
+                    // If optional property emit ?
+                    if ((node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */ || node.kind === 142 /* Parameter */) && ts.hasQuestionToken(node)) {
+                        write("?");
+                    }
+                    if ((node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */) && node.parent.kind === 159 /* TypeLiteral */) {
+                        emitTypeOfVariableDeclarationFromTypeLiteral(node);
+                    }
+                    else if (!(node.flags & 8 /* Private */)) {
+                        writeTypeOfDeclaration(node, node.type, getVariableDeclarationTypeVisibilityError);
+                    }
+                }
+            }
+            function getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                if (node.kind === 218 /* VariableDeclaration */) {
+                    return symbolAccessibilityResult.errorModuleName ?
+                        symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                            ts.Diagnostics.Exported_variable_0_has_or_is_using_name_1_from_private_module_2 :
+                        ts.Diagnostics.Exported_variable_0_has_or_is_using_private_name_1;
+                }
+                else if (node.kind === 145 /* PropertyDeclaration */ || node.kind === 144 /* PropertySignature */) {
+                    // TODO(jfreeman): Deal with computed properties in error reporting.
+                    if (node.flags & 32 /* Static */) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_static_property_0_of_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else if (node.parent.kind === 221 /* ClassDeclaration */) {
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Public_property_0_of_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        // Interfaces cannot have types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Property_0_of_exported_interface_has_or_is_using_private_name_1;
+                    }
+                }
+            }
+            function getVariableDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
+            }
+            function emitBindingPattern(bindingPattern) {
+                // Only select non-omitted expression from the bindingPattern's elements.
+                // We have to do this to avoid emitting trailing commas.
+                // For example:
+                //      original: var [, c,,] = [ 2,3,4]
+                //      emitted: declare var c: number; // instead of declare var c:number, ;
+                var elements = [];
+                for (var _i = 0, _a = bindingPattern.elements; _i < _a.length; _i++) {
+                    var element = _a[_i];
+                    if (element.kind !== 193 /* OmittedExpression */) {
+                        elements.push(element);
+                    }
+                }
+                emitCommaList(elements, emitBindingElement);
+            }
+            function emitBindingElement(bindingElement) {
+                function getBindingElementTypeVisibilityError(symbolAccessibilityResult) {
+                    var diagnosticMessage = getVariableDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                    return diagnosticMessage !== undefined ? {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: bindingElement,
+                        typeName: bindingElement.name
+                    } : undefined;
+                }
+                if (bindingElement.name) {
+                    if (ts.isBindingPattern(bindingElement.name)) {
+                        emitBindingPattern(bindingElement.name);
+                    }
+                    else {
+                        writeTextOfNode(currentText, bindingElement.name);
+                        writeTypeOfDeclaration(bindingElement, /*type*/ undefined, getBindingElementTypeVisibilityError);
+                    }
+                }
+            }
+        }
+        function emitTypeOfVariableDeclarationFromTypeLiteral(node) {
+            // if this is property of type literal,
+            // or is parameter of method/call/construct/index signature of type literal
+            // emit only if type is specified
+            if (node.type) {
+                write(": ");
+                emitType(node.type);
+            }
+        }
+        function isVariableStatementVisible(node) {
+            return ts.forEach(node.declarationList.declarations, function (varDeclaration) { return resolver.isDeclarationVisible(varDeclaration); });
+        }
+        function writeVariableStatement(node) {
+            emitJsDocComments(node);
+            emitModuleElementDeclarationFlags(node);
+            if (ts.isLet(node.declarationList)) {
+                write("let ");
+            }
+            else if (ts.isConst(node.declarationList)) {
+                write("const ");
+            }
+            else {
+                write("var ");
+            }
+            emitCommaList(node.declarationList.declarations, emitVariableDeclaration, resolver.isDeclarationVisible);
+            write(";");
+            writeLine();
+        }
+        function emitAccessorDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            var accessors = ts.getAllAccessorDeclarations(node.parent.members, node);
+            var accessorWithTypeAnnotation;
+            if (node === accessors.firstAccessor) {
+                emitJsDocComments(accessors.getAccessor);
+                emitJsDocComments(accessors.setAccessor);
+                emitClassMemberDeclarationFlags(node.flags | (accessors.setAccessor ? 0 : 64 /* Readonly */));
+                writeTextOfNode(currentText, node.name);
+                if (!(node.flags & 8 /* Private */)) {
+                    accessorWithTypeAnnotation = node;
+                    var type = getTypeAnnotationFromAccessor(node);
+                    if (!type) {
+                        // couldn't get type for the first accessor, try the another one
+                        var anotherAccessor = node.kind === 149 /* GetAccessor */ ? accessors.setAccessor : accessors.getAccessor;
+                        type = getTypeAnnotationFromAccessor(anotherAccessor);
+                        if (type) {
+                            accessorWithTypeAnnotation = anotherAccessor;
+                        }
+                    }
+                    writeTypeOfDeclaration(node, type, getAccessorDeclarationTypeVisibilityError);
+                }
+                write(";");
+                writeLine();
+            }
+            function getTypeAnnotationFromAccessor(accessor) {
+                if (accessor) {
+                    return accessor.kind === 149 /* GetAccessor */
+                        ? accessor.type // Getter - return type
+                        : accessor.parameters.length > 0
+                            ? accessor.parameters[0].type // Setter parameter type
+                            : undefined;
+                }
+            }
+            function getAccessorDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                if (accessorWithTypeAnnotation.kind === 150 /* SetAccessor */) {
+                    // Setters have to have type named and cannot infer it so, the type should always be named
+                    if (accessorWithTypeAnnotation.parent.flags & 32 /* Static */) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_static_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_public_property_setter_from_exported_class_has_or_is_using_private_name_1;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.parameters[0],
+                        // TODO(jfreeman): Investigate why we are passing node.name instead of node.parameters[0].name
+                        typeName: accessorWithTypeAnnotation.name
+                    };
+                }
+                else {
+                    if (accessorWithTypeAnnotation.flags & 32 /* Static */) {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_static_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    else {
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_public_property_getter_from_exported_class_has_or_is_using_private_name_0;
+                    }
+                    return {
+                        diagnosticMessage: diagnosticMessage,
+                        errorNode: accessorWithTypeAnnotation.name,
+                        typeName: undefined
+                    };
+                }
+            }
+        }
+        function writeFunctionDeclaration(node) {
+            if (ts.hasDynamicName(node)) {
+                return;
+            }
+            // If we are emitting Method/Constructor it isn't moduleElement and hence already determined to be emitting
+            // so no need to verify if the declaration is visible
+            if (!resolver.isImplementationOfOverload(node)) {
+                emitJsDocComments(node);
+                if (node.kind === 220 /* FunctionDeclaration */) {
+                    emitModuleElementDeclarationFlags(node);
+                }
+                else if (node.kind === 147 /* MethodDeclaration */ || node.kind === 148 /* Constructor */) {
+                    emitClassMemberDeclarationFlags(node.flags);
+                }
+                if (node.kind === 220 /* FunctionDeclaration */) {
+                    write("function ");
+                    writeTextOfNode(currentText, node.name);
+                }
+                else if (node.kind === 148 /* Constructor */) {
+                    write("constructor");
+                }
+                else {
+                    writeTextOfNode(currentText, node.name);
+                    if (ts.hasQuestionToken(node)) {
+                        write("?");
+                    }
+                }
+                emitSignatureDeclaration(node);
+            }
+        }
+        function emitSignatureDeclarationWithJsDocComments(node) {
+            emitJsDocComments(node);
+            emitSignatureDeclaration(node);
+        }
+        function emitSignatureDeclaration(node) {
+            var prevEnclosingDeclaration = enclosingDeclaration;
+            enclosingDeclaration = node;
+            var closeParenthesizedFunctionType = false;
+            if (node.kind === 153 /* IndexSignature */) {
+                // Index signature can have readonly modifier
+                emitClassMemberDeclarationFlags(node.flags);
+                write("[");
+            }
+            else {
+                // Construct signature or constructor type write new Signature
+                if (node.kind === 152 /* ConstructSignature */ || node.kind === 157 /* ConstructorType */) {
+                    write("new ");
+                }
+                else if (node.kind === 156 /* FunctionType */) {
+                    var currentOutput = writer.getText();
+                    // Do not generate incorrect type when function type with type parameters is type argument
+                    // This could happen if user used space between two '<' making it error free
+                    // e.g var x: A< <Tany>(a: Tany)=>Tany>;
+                    if (node.typeParameters && currentOutput.charAt(currentOutput.length - 1) === "<") {
+                        closeParenthesizedFunctionType = true;
+                        write("(");
+                    }
+                }
+                emitTypeParameters(node.typeParameters);
+                write("(");
+            }
+            // Parameters
+            emitCommaList(node.parameters, emitParameterDeclaration);
+            if (node.kind === 153 /* IndexSignature */) {
+                write("]");
+            }
+            else {
+                write(")");
+            }
+            // If this is not a constructor and is not private, emit the return type
+            var isFunctionTypeOrConstructorType = node.kind === 156 /* FunctionType */ || node.kind === 157 /* ConstructorType */;
+            if (isFunctionTypeOrConstructorType || node.parent.kind === 159 /* TypeLiteral */) {
+                // Emit type literal signature return type only if specified
+                if (node.type) {
+                    write(isFunctionTypeOrConstructorType ? " => " : ": ");
+                    emitType(node.type);
+                }
+            }
+            else if (node.kind !== 148 /* Constructor */ && !(node.flags & 8 /* Private */)) {
+                writeReturnTypeAtSignature(node, getReturnTypeVisibilityError);
+            }
+            enclosingDeclaration = prevEnclosingDeclaration;
+            if (!isFunctionTypeOrConstructorType) {
+                write(";");
+                writeLine();
+            }
+            else if (closeParenthesizedFunctionType) {
+                write(")");
+            }
+            function getReturnTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage;
+                switch (node.kind) {
+                    case 152 /* ConstructSignature */:
+                        // Interfaces cannot have return types that cannot be named
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 151 /* CallSignature */:
+                        // Interfaces cannot have return types that cannot be named
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_call_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 153 /* IndexSignature */:
+                        // Interfaces cannot have return types that cannot be named
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_index_signature_from_exported_interface_has_or_is_using_private_name_0;
+                        break;
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        if (node.flags & 32 /* Static */) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_static_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else if (node.parent.kind === 221 /* ClassDeclaration */) {
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                    ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_public_method_from_exported_class_has_or_is_using_private_name_0;
+                        }
+                        else {
+                            // Interfaces cannot have return types that cannot be named
+                            diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_name_0_from_private_module_1 :
+                                ts.Diagnostics.Return_type_of_method_from_exported_interface_has_or_is_using_private_name_0;
+                        }
+                        break;
+                    case 220 /* FunctionDeclaration */:
+                        diagnosticMessage = symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_external_module_1_but_cannot_be_named :
+                                ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_name_0_from_private_module_1 :
+                            ts.Diagnostics.Return_type_of_exported_function_has_or_is_using_private_name_0;
+                        break;
+                    default:
+                        ts.Debug.fail("This is unknown kind for signature: " + node.kind);
+                }
+                return {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node.name || node
+                };
+            }
+        }
+        function emitParameterDeclaration(node) {
+            increaseIndent();
+            emitJsDocComments(node);
+            if (node.dotDotDotToken) {
+                write("...");
+            }
+            if (ts.isBindingPattern(node.name)) {
+                // For bindingPattern, we can't simply writeTextOfNode from the source file
+                // because we want to omit the initializer and using writeTextOfNode will result in initializer get emitted.
+                // Therefore, we will have to recursively emit each element in the bindingPattern.
+                emitBindingPattern(node.name);
+            }
+            else {
+                writeTextOfNode(currentText, node.name);
+            }
+            if (resolver.isOptionalParameter(node)) {
+                write("?");
+            }
+            decreaseIndent();
+            if (node.parent.kind === 156 /* FunctionType */ ||
+                node.parent.kind === 157 /* ConstructorType */ ||
+                node.parent.parent.kind === 159 /* TypeLiteral */) {
+                emitTypeOfVariableDeclarationFromTypeLiteral(node);
+            }
+            else if (!(node.parent.flags & 8 /* Private */)) {
+                writeTypeOfDeclaration(node, node.type, getParameterDeclarationTypeVisibilityError);
+            }
+            function getParameterDeclarationTypeVisibilityError(symbolAccessibilityResult) {
+                var diagnosticMessage = getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult);
+                return diagnosticMessage !== undefined ? {
+                    diagnosticMessage: diagnosticMessage,
+                    errorNode: node,
+                    typeName: node.name
+                } : undefined;
+            }
+            function getParameterDeclarationTypeVisibilityDiagnosticMessage(symbolAccessibilityResult) {
+                switch (node.parent.kind) {
+                    case 148 /* Constructor */:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_from_exported_class_has_or_is_using_private_name_1;
+                    case 152 /* ConstructSignature */:
+                        // Interfaces cannot have parameter types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_constructor_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 151 /* CallSignature */:
+                        // Interfaces cannot have parameter types that cannot be named
+                        return symbolAccessibilityResult.errorModuleName ?
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_call_signature_from_exported_interface_has_or_is_using_private_name_1;
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        if (node.parent.flags & 32 /* Static */) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_static_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else if (node.parent.parent.kind === 221 /* ClassDeclaration */) {
+                            return symbolAccessibilityResult.errorModuleName ?
+                                symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                    ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_public_method_from_exported_class_has_or_is_using_private_name_1;
+                        }
+                        else {
+                            // Interfaces cannot have parameter types that cannot be named
+                            return symbolAccessibilityResult.errorModuleName ?
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_name_1_from_private_module_2 :
+                                ts.Diagnostics.Parameter_0_of_method_from_exported_interface_has_or_is_using_private_name_1;
+                        }
+                    case 220 /* FunctionDeclaration */:
+                        return symbolAccessibilityResult.errorModuleName ?
+                            symbolAccessibilityResult.accessibility === 2 /* CannotBeNamed */ ?
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_external_module_2_but_cannot_be_named :
+                                ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_name_1_from_private_module_2 :
+                            ts.Diagnostics.Parameter_0_of_exported_function_has_or_is_using_private_name_1;
+                    default:
+                        ts.Debug.fail("This is unknown parent for parameter: " + node.parent.kind);
+                }
+            }
+            function emitBindingPattern(bindingPattern) {
+                // We have to explicitly emit square bracket and bracket because these tokens are not store inside the node.
+                if (bindingPattern.kind === 167 /* ObjectBindingPattern */) {
+                    write("{");
+                    emitCommaList(bindingPattern.elements, emitBindingElement);
+                    write("}");
+                }
+                else if (bindingPattern.kind === 168 /* ArrayBindingPattern */) {
+                    write("[");
+                    var elements = bindingPattern.elements;
+                    emitCommaList(elements, emitBindingElement);
+                    if (elements && elements.hasTrailingComma) {
+                        write(", ");
+                    }
+                    write("]");
+                }
+            }
+            function emitBindingElement(bindingElement) {
+                if (bindingElement.kind === 193 /* OmittedExpression */) {
+                    // If bindingElement is an omittedExpression (i.e. containing elision),
+                    // we will emit blank space (although this may differ from users' original code,
+                    // it allows emitSeparatedList to write separator appropriately)
+                    // Example:
+                    //      original: function foo([, x, ,]) {}
+                    //      emit    : function foo([ , x,  , ]) {}
+                    write(" ");
+                }
+                else if (bindingElement.kind === 169 /* BindingElement */) {
+                    if (bindingElement.propertyName) {
+                        // bindingElement has propertyName property in the following case:
+                        //      { y: [a,b,c] ...} -> bindingPattern will have a property called propertyName for "y"
+                        // We have to explicitly emit the propertyName before descending into its binding elements.
+                        // Example:
+                        //      original: function foo({y: [a,b,c]}) {}
+                        //      emit    : declare function foo({y: [a, b, c]}: { y: [any, any, any] }) void;
+                        writeTextOfNode(currentText, bindingElement.propertyName);
+                        write(": ");
+                    }
+                    if (bindingElement.name) {
+                        if (ts.isBindingPattern(bindingElement.name)) {
+                            // If it is a nested binding pattern, we will recursively descend into each element and emit each one separately.
+                            // In the case of rest element, we will omit rest element.
+                            // Example:
+                            //      original: function foo([a, [[b]], c] = [1,[["string"]], 3]) {}
+                            //      emit    : declare function foo([a, [[b]], c]: [number, [[string]], number]): void;
+                            //      original with rest: function foo([a, ...c]) {}
+                            //      emit              : declare function foo([a, ...c]): void;
+                            emitBindingPattern(bindingElement.name);
+                        }
+                        else {
+                            ts.Debug.assert(bindingElement.name.kind === 69 /* Identifier */);
+                            // If the node is just an identifier, we will simply emit the text associated with the node's name
+                            // Example:
+                            //      original: function foo({y = 10, x}) {}
+                            //      emit    : declare function foo({y, x}: {number, any}): void;
+                            if (bindingElement.dotDotDotToken) {
+                                write("...");
+                            }
+                            writeTextOfNode(currentText, bindingElement.name);
+                        }
+                    }
+                }
+            }
+        }
+        function emitNode(node) {
+            switch (node.kind) {
+                case 220 /* FunctionDeclaration */:
+                case 225 /* ModuleDeclaration */:
+                case 229 /* ImportEqualsDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 221 /* ClassDeclaration */:
+                case 223 /* TypeAliasDeclaration */:
+                case 224 /* EnumDeclaration */:
+                    return emitModuleElement(node, isModuleElementVisible(node));
+                case 200 /* VariableStatement */:
+                    return emitModuleElement(node, isVariableStatementVisible(node));
+                case 230 /* ImportDeclaration */:
+                    // Import declaration without import clause is visible, otherwise it is not visible
+                    return emitModuleElement(node, /*isModuleElementVisible*/ !node.importClause);
+                case 236 /* ExportDeclaration */:
+                    return emitExportDeclaration(node);
+                case 148 /* Constructor */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                    return writeFunctionDeclaration(node);
+                case 152 /* ConstructSignature */:
+                case 151 /* CallSignature */:
+                case 153 /* IndexSignature */:
+                    return emitSignatureDeclarationWithJsDocComments(node);
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                    return emitAccessorDeclaration(node);
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                    return emitPropertyDeclaration(node);
+                case 255 /* EnumMember */:
+                    return emitEnumMemberDeclaration(node);
+                case 235 /* ExportAssignment */:
+                    return emitExportAssignment(node);
+                case 256 /* SourceFile */:
+                    return emitSourceFile(node);
+            }
+        }
+        /**
+         * Adds the reference to referenced file, returns true if global file reference was emitted
+         * @param referencedFile
+         * @param addBundledFileReference Determines if global file reference corresponding to bundled file should be emitted or not
+         */
+        function writeReferencePath(referencedFile, addBundledFileReference) {
+            var declFileName;
+            var addedBundledEmitReference = false;
+            if (ts.isDeclarationFile(referencedFile)) {
+                // Declaration file, use declaration file name
+                declFileName = referencedFile.fileName;
+            }
+            else {
+                // Get the declaration file path
+                ts.forEachExpectedEmitFile(host, getDeclFileName, referencedFile);
+            }
+            if (declFileName) {
+                declFileName = ts.getRelativePathToDirectoryOrUrl(ts.getDirectoryPath(ts.normalizeSlashes(declarationFilePath)), declFileName, host.getCurrentDirectory(), host.getCanonicalFileName, 
+                /*isAbsolutePathAnUrl*/ false);
+                referencesOutput += "/// <reference path=\"" + declFileName + "\" />" + newLine;
+            }
+            return addedBundledEmitReference;
+            function getDeclFileName(emitFileNames, sourceFiles, isBundledEmit) {
+                // Dont add reference path to this file if it is a bundled emit and caller asked not emit bundled file path
+                if (isBundledEmit && !addBundledFileReference) {
+                    return;
+                }
+                ts.Debug.assert(!!emitFileNames.declarationFilePath || ts.isSourceFileJavaScript(referencedFile), "Declaration file is not present only for javascript files");
+                declFileName = emitFileNames.declarationFilePath || emitFileNames.jsFilePath;
+                addedBundledEmitReference = isBundledEmit;
+            }
+        }
+    }
+    /* @internal */
+    function writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) {
+        var emitDeclarationResult = emitDeclarations(host, resolver, emitterDiagnostics, declarationFilePath, sourceFiles, isBundledEmit);
+        var emitSkipped = emitDeclarationResult.reportedDeclarationError || host.isEmitBlocked(declarationFilePath) || host.getCompilerOptions().noEmit;
+        if (!emitSkipped) {
+            var declarationOutput = emitDeclarationResult.referencesOutput
+                + getDeclarationOutput(emitDeclarationResult.synchronousDeclarationOutput, emitDeclarationResult.moduleElementDeclarationEmitInfo);
+            ts.writeFile(host, emitterDiagnostics, declarationFilePath, declarationOutput, host.getCompilerOptions().emitBOM, sourceFiles);
+        }
+        return emitSkipped;
+        function getDeclarationOutput(synchronousDeclarationOutput, moduleElementDeclarationEmitInfo) {
+            var appliedSyncOutputPos = 0;
+            var declarationOutput = "";
+            // apply asynchronous additions to the synchronous output
+            ts.forEach(moduleElementDeclarationEmitInfo, function (aliasEmitInfo) {
+                if (aliasEmitInfo.asynchronousOutput) {
+                    declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos, aliasEmitInfo.outputPos);
+                    declarationOutput += getDeclarationOutput(aliasEmitInfo.asynchronousOutput, aliasEmitInfo.subModuleElementDeclarationEmitInfo);
+                    appliedSyncOutputPos = aliasEmitInfo.outputPos;
+                }
+            });
+            declarationOutput += synchronousDeclarationOutput.substring(appliedSyncOutputPos);
+            return declarationOutput;
+        }
+    }
+    ts.writeDeclarationFile = writeDeclarationFile;
+})(ts || (ts = {}));
+/// <reference path="checker.ts"/>
+/// <reference path="sourcemap.ts" />
+/// <reference path="declarationEmitter.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    function getResolvedExternalModuleName(host, file) {
+        return file.moduleName || ts.getExternalModuleNameFromPath(host, file.fileName);
+    }
+    ts.getResolvedExternalModuleName = getResolvedExternalModuleName;
+    function getExternalModuleNameFromDeclaration(host, resolver, declaration) {
+        var file = resolver.getExternalModuleFileFromDeclaration(declaration);
+        if (!file || ts.isDeclarationFile(file)) {
+            return undefined;
+        }
+        return getResolvedExternalModuleName(host, file);
+    }
+    ts.getExternalModuleNameFromDeclaration = getExternalModuleNameFromDeclaration;
+    var Jump;
+    (function (Jump) {
+        Jump[Jump["Break"] = 2] = "Break";
+        Jump[Jump["Continue"] = 4] = "Continue";
+        Jump[Jump["Return"] = 8] = "Return";
+    })(Jump || (Jump = {}));
+    var entities = {
+        "quot": 0x0022,
+        "amp": 0x0026,
+        "apos": 0x0027,
+        "lt": 0x003C,
+        "gt": 0x003E,
+        "nbsp": 0x00A0,
+        "iexcl": 0x00A1,
+        "cent": 0x00A2,
+        "pound": 0x00A3,
+        "curren": 0x00A4,
+        "yen": 0x00A5,
+        "brvbar": 0x00A6,
+        "sect": 0x00A7,
+        "uml": 0x00A8,
+        "copy": 0x00A9,
+        "ordf": 0x00AA,
+        "laquo": 0x00AB,
+        "not": 0x00AC,
+        "shy": 0x00AD,
+        "reg": 0x00AE,
+        "macr": 0x00AF,
+        "deg": 0x00B0,
+        "plusmn": 0x00B1,
+        "sup2": 0x00B2,
+        "sup3": 0x00B3,
+        "acute": 0x00B4,
+        "micro": 0x00B5,
+        "para": 0x00B6,
+        "middot": 0x00B7,
+        "cedil": 0x00B8,
+        "sup1": 0x00B9,
+        "ordm": 0x00BA,
+        "raquo": 0x00BB,
+        "frac14": 0x00BC,
+        "frac12": 0x00BD,
+        "frac34": 0x00BE,
+        "iquest": 0x00BF,
+        "Agrave": 0x00C0,
+        "Aacute": 0x00C1,
+        "Acirc": 0x00C2,
+        "Atilde": 0x00C3,
+        "Auml": 0x00C4,
+        "Aring": 0x00C5,
+        "AElig": 0x00C6,
+        "Ccedil": 0x00C7,
+        "Egrave": 0x00C8,
+        "Eacute": 0x00C9,
+        "Ecirc": 0x00CA,
+        "Euml": 0x00CB,
+        "Igrave": 0x00CC,
+        "Iacute": 0x00CD,
+        "Icirc": 0x00CE,
+        "Iuml": 0x00CF,
+        "ETH": 0x00D0,
+        "Ntilde": 0x00D1,
+        "Ograve": 0x00D2,
+        "Oacute": 0x00D3,
+        "Ocirc": 0x00D4,
+        "Otilde": 0x00D5,
+        "Ouml": 0x00D6,
+        "times": 0x00D7,
+        "Oslash": 0x00D8,
+        "Ugrave": 0x00D9,
+        "Uacute": 0x00DA,
+        "Ucirc": 0x00DB,
+        "Uuml": 0x00DC,
+        "Yacute": 0x00DD,
+        "THORN": 0x00DE,
+        "szlig": 0x00DF,
+        "agrave": 0x00E0,
+        "aacute": 0x00E1,
+        "acirc": 0x00E2,
+        "atilde": 0x00E3,
+        "auml": 0x00E4,
+        "aring": 0x00E5,
+        "aelig": 0x00E6,
+        "ccedil": 0x00E7,
+        "egrave": 0x00E8,
+        "eacute": 0x00E9,
+        "ecirc": 0x00EA,
+        "euml": 0x00EB,
+        "igrave": 0x00EC,
+        "iacute": 0x00ED,
+        "icirc": 0x00EE,
+        "iuml": 0x00EF,
+        "eth": 0x00F0,
+        "ntilde": 0x00F1,
+        "ograve": 0x00F2,
+        "oacute": 0x00F3,
+        "ocirc": 0x00F4,
+        "otilde": 0x00F5,
+        "ouml": 0x00F6,
+        "divide": 0x00F7,
+        "oslash": 0x00F8,
+        "ugrave": 0x00F9,
+        "uacute": 0x00FA,
+        "ucirc": 0x00FB,
+        "uuml": 0x00FC,
+        "yacute": 0x00FD,
+        "thorn": 0x00FE,
+        "yuml": 0x00FF,
+        "OElig": 0x0152,
+        "oelig": 0x0153,
+        "Scaron": 0x0160,
+        "scaron": 0x0161,
+        "Yuml": 0x0178,
+        "fnof": 0x0192,
+        "circ": 0x02C6,
+        "tilde": 0x02DC,
+        "Alpha": 0x0391,
+        "Beta": 0x0392,
+        "Gamma": 0x0393,
+        "Delta": 0x0394,
+        "Epsilon": 0x0395,
+        "Zeta": 0x0396,
+        "Eta": 0x0397,
+        "Theta": 0x0398,
+        "Iota": 0x0399,
+        "Kappa": 0x039A,
+        "Lambda": 0x039B,
+        "Mu": 0x039C,
+        "Nu": 0x039D,
+        "Xi": 0x039E,
+        "Omicron": 0x039F,
+        "Pi": 0x03A0,
+        "Rho": 0x03A1,
+        "Sigma": 0x03A3,
+        "Tau": 0x03A4,
+        "Upsilon": 0x03A5,
+        "Phi": 0x03A6,
+        "Chi": 0x03A7,
+        "Psi": 0x03A8,
+        "Omega": 0x03A9,
+        "alpha": 0x03B1,
+        "beta": 0x03B2,
+        "gamma": 0x03B3,
+        "delta": 0x03B4,
+        "epsilon": 0x03B5,
+        "zeta": 0x03B6,
+        "eta": 0x03B7,
+        "theta": 0x03B8,
+        "iota": 0x03B9,
+        "kappa": 0x03BA,
+        "lambda": 0x03BB,
+        "mu": 0x03BC,
+        "nu": 0x03BD,
+        "xi": 0x03BE,
+        "omicron": 0x03BF,
+        "pi": 0x03C0,
+        "rho": 0x03C1,
+        "sigmaf": 0x03C2,
+        "sigma": 0x03C3,
+        "tau": 0x03C4,
+        "upsilon": 0x03C5,
+        "phi": 0x03C6,
+        "chi": 0x03C7,
+        "psi": 0x03C8,
+        "omega": 0x03C9,
+        "thetasym": 0x03D1,
+        "upsih": 0x03D2,
+        "piv": 0x03D6,
+        "ensp": 0x2002,
+        "emsp": 0x2003,
+        "thinsp": 0x2009,
+        "zwnj": 0x200C,
+        "zwj": 0x200D,
+        "lrm": 0x200E,
+        "rlm": 0x200F,
+        "ndash": 0x2013,
+        "mdash": 0x2014,
+        "lsquo": 0x2018,
+        "rsquo": 0x2019,
+        "sbquo": 0x201A,
+        "ldquo": 0x201C,
+        "rdquo": 0x201D,
+        "bdquo": 0x201E,
+        "dagger": 0x2020,
+        "Dagger": 0x2021,
+        "bull": 0x2022,
+        "hellip": 0x2026,
+        "permil": 0x2030,
+        "prime": 0x2032,
+        "Prime": 0x2033,
+        "lsaquo": 0x2039,
+        "rsaquo": 0x203A,
+        "oline": 0x203E,
+        "frasl": 0x2044,
+        "euro": 0x20AC,
+        "image": 0x2111,
+        "weierp": 0x2118,
+        "real": 0x211C,
+        "trade": 0x2122,
+        "alefsym": 0x2135,
+        "larr": 0x2190,
+        "uarr": 0x2191,
+        "rarr": 0x2192,
+        "darr": 0x2193,
+        "harr": 0x2194,
+        "crarr": 0x21B5,
+        "lArr": 0x21D0,
+        "uArr": 0x21D1,
+        "rArr": 0x21D2,
+        "dArr": 0x21D3,
+        "hArr": 0x21D4,
+        "forall": 0x2200,
+        "part": 0x2202,
+        "exist": 0x2203,
+        "empty": 0x2205,
+        "nabla": 0x2207,
+        "isin": 0x2208,
+        "notin": 0x2209,
+        "ni": 0x220B,
+        "prod": 0x220F,
+        "sum": 0x2211,
+        "minus": 0x2212,
+        "lowast": 0x2217,
+        "radic": 0x221A,
+        "prop": 0x221D,
+        "infin": 0x221E,
+        "ang": 0x2220,
+        "and": 0x2227,
+        "or": 0x2228,
+        "cap": 0x2229,
+        "cup": 0x222A,
+        "int": 0x222B,
+        "there4": 0x2234,
+        "sim": 0x223C,
+        "cong": 0x2245,
+        "asymp": 0x2248,
+        "ne": 0x2260,
+        "equiv": 0x2261,
+        "le": 0x2264,
+        "ge": 0x2265,
+        "sub": 0x2282,
+        "sup": 0x2283,
+        "nsub": 0x2284,
+        "sube": 0x2286,
+        "supe": 0x2287,
+        "oplus": 0x2295,
+        "otimes": 0x2297,
+        "perp": 0x22A5,
+        "sdot": 0x22C5,
+        "lceil": 0x2308,
+        "rceil": 0x2309,
+        "lfloor": 0x230A,
+        "rfloor": 0x230B,
+        "lang": 0x2329,
+        "rang": 0x232A,
+        "loz": 0x25CA,
+        "spades": 0x2660,
+        "clubs": 0x2663,
+        "hearts": 0x2665,
+        "diams": 0x2666
+    };
+    // Flags enum to track count of temp variables and a few dedicated names
+    var TempFlags;
+    (function (TempFlags) {
+        TempFlags[TempFlags["Auto"] = 0] = "Auto";
+        TempFlags[TempFlags["CountMask"] = 268435455] = "CountMask";
+        TempFlags[TempFlags["_i"] = 268435456] = "_i";
+    })(TempFlags || (TempFlags = {}));
+    var CopyDirection;
+    (function (CopyDirection) {
+        CopyDirection[CopyDirection["ToOriginal"] = 0] = "ToOriginal";
+        CopyDirection[CopyDirection["ToOutParameter"] = 1] = "ToOutParameter";
+    })(CopyDirection || (CopyDirection = {}));
+    // targetSourceFile is when users only want one file in entire project to be emitted. This is used in compileOnSave feature
+    function emitFiles(resolver, host, targetSourceFile) {
+        // emit output for the __extends helper function
+        var extendsHelper = "\nvar __extends = (this && this.__extends) || function (d, b) {\n    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];\n    function __() { this.constructor = d; }\n    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());\n};";
+        var assignHelper = "\nvar __assign = (this && this.__assign) || Object.assign || function(t) {\n    for (var s, i = 1, n = arguments.length; i < n; i++) {\n        s = arguments[i];\n        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))\n            t[p] = s[p];\n    }\n    return t;\n};";
+        // emit output for the __decorate helper function
+        var decorateHelper = "\nvar __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {\n    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;\n    if (typeof Reflect === \"object\" && typeof Reflect.decorate === \"function\") r = Reflect.decorate(decorators, target, key, desc);\n    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;\n    return c > 3 && r && Object.defineProperty(target, key, r), r;\n};";
+        // emit output for the __metadata helper function
+        var metadataHelper = "\nvar __metadata = (this && this.__metadata) || function (k, v) {\n    if (typeof Reflect === \"object\" && typeof Reflect.metadata === \"function\") return Reflect.metadata(k, v);\n};";
+        // emit output for the __param helper function
+        var paramHelper = "\nvar __param = (this && this.__param) || function (paramIndex, decorator) {\n    return function (target, key) { decorator(target, key, paramIndex); }\n};";
+        var awaiterHelper = "\nvar __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {\n    return new (P || (P = Promise))(function (resolve, reject) {\n        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }\n        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }\n        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }\n        step((generator = generator.apply(thisArg, _arguments)).next());\n    });\n};";
+        var compilerOptions = host.getCompilerOptions();
+        var languageVersion = ts.getEmitScriptTarget(compilerOptions);
+        var modulekind = ts.getEmitModuleKind(compilerOptions);
+        var sourceMapDataList = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? [] : undefined;
+        var emittedFilesList = compilerOptions.listEmittedFiles ? [] : undefined;
+        var emitterDiagnostics = ts.createDiagnosticCollection();
+        var emitSkipped = false;
+        var newLine = host.getNewLine();
+        var emitJavaScript = createFileEmitter();
+        ts.forEachExpectedEmitFile(host, emitFile, targetSourceFile);
+        return {
+            emitSkipped: emitSkipped,
+            diagnostics: emitterDiagnostics.getDiagnostics(),
+            emittedFiles: emittedFilesList,
+            sourceMaps: sourceMapDataList
+        };
+        function isUniqueLocalName(name, container) {
+            for (var node = container; ts.isNodeDescendentOf(node, container); node = node.nextContainer) {
+                if (node.locals && ts.hasProperty(node.locals, name)) {
+                    // We conservatively include alias symbols to cover cases where they're emitted as locals
+                    if (node.locals[name].flags & (107455 /* Value */ | 1048576 /* ExportValue */ | 8388608 /* Alias */)) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function setLabeledJump(state, isBreak, labelText, labelMarker) {
+            if (isBreak) {
+                if (!state.labeledNonLocalBreaks) {
+                    state.labeledNonLocalBreaks = {};
+                }
+                state.labeledNonLocalBreaks[labelText] = labelMarker;
+            }
+            else {
+                if (!state.labeledNonLocalContinues) {
+                    state.labeledNonLocalContinues = {};
+                }
+                state.labeledNonLocalContinues[labelText] = labelMarker;
+            }
+        }
+        function hoistVariableDeclarationFromLoop(state, declaration) {
+            if (!state.hoistedLocalVariables) {
+                state.hoistedLocalVariables = [];
+            }
+            visit(declaration.name);
+            function visit(node) {
+                if (node.kind === 69 /* Identifier */) {
+                    state.hoistedLocalVariables.push(node);
+                }
+                else {
+                    for (var _a = 0, _b = node.elements; _a < _b.length; _a++) {
+                        var element = _b[_a];
+                        visit(element.name);
+                    }
+                }
+            }
+        }
+        function createFileEmitter() {
+            var writer = ts.createTextWriter(newLine);
+            var write = writer.write, writeTextOfNode = writer.writeTextOfNode, writeLine = writer.writeLine, increaseIndent = writer.increaseIndent, decreaseIndent = writer.decreaseIndent;
+            var sourceMap = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? ts.createSourceMapWriter(host, writer) : ts.getNullSourceMapWriter();
+            var setSourceFile = sourceMap.setSourceFile, emitStart = sourceMap.emitStart, emitEnd = sourceMap.emitEnd, emitPos = sourceMap.emitPos;
+            var currentSourceFile;
+            var currentText;
+            var currentLineMap;
+            var currentFileIdentifiers;
+            var renamedDependencies;
+            var isEs6Module;
+            var isCurrentFileExternalModule;
+            // name of an exporter function if file is a System external module
+            // System.register([...], function (<exporter>) {...})
+            // exporting in System modules looks like:
+            // export var x; ... x = 1
+            // =>
+            // var x;... exporter("x", x = 1)
+            var exportFunctionForFile;
+            var contextObjectForFile;
+            var generatedNameSet;
+            var nodeToGeneratedName;
+            var computedPropertyNamesToGeneratedNames;
+            var decoratedClassAliases;
+            var convertedLoopState;
+            var extendsEmitted;
+            var assignEmitted;
+            var decorateEmitted;
+            var paramEmitted;
+            var awaiterEmitted;
+            var tempFlags = 0;
+            var tempVariables;
+            var tempParameters;
+            var externalImports;
+            var exportSpecifiers;
+            var exportEquals;
+            var hasExportStarsToExportValues;
+            var detachedCommentsInfo;
+            /** Sourcemap data that will get encoded */
+            var sourceMapData;
+            /** Is the file being emitted into its own file */
+            var isOwnFileEmit;
+            /** If removeComments is true, no leading-comments needed to be emitted **/
+            var emitLeadingCommentsOfPosition = compilerOptions.removeComments ? function (pos) { } : emitLeadingCommentsOfPositionWorker;
+            var setSourceMapWriterEmit = compilerOptions.sourceMap || compilerOptions.inlineSourceMap ? changeSourceMapEmit : function (writer) { };
+            var moduleEmitDelegates = (_a = {},
+                _a[ts.ModuleKind.ES6] = emitES6Module,
+                _a[ts.ModuleKind.AMD] = emitAMDModule,
+                _a[ts.ModuleKind.System] = emitSystemModule,
+                _a[ts.ModuleKind.UMD] = emitUMDModule,
+                _a[ts.ModuleKind.CommonJS] = emitCommonJSModule,
+                _a
+            );
+            var bundleEmitDelegates = (_b = {},
+                _b[ts.ModuleKind.ES6] = function () { },
+                _b[ts.ModuleKind.AMD] = emitAMDModule,
+                _b[ts.ModuleKind.System] = emitSystemModule,
+                _b[ts.ModuleKind.UMD] = function () { },
+                _b[ts.ModuleKind.CommonJS] = function () { },
+                _b
+            );
+            return doEmit;
+            function doEmit(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit) {
+                sourceMap.initialize(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
+                generatedNameSet = {};
+                nodeToGeneratedName = [];
+                decoratedClassAliases = [];
+                isOwnFileEmit = !isBundledEmit;
+                // Emit helpers from all the files
+                if (isBundledEmit && modulekind) {
+                    ts.forEach(sourceFiles, emitEmitHelpers);
+                }
+                // Do not call emit directly. It does not set the currentSourceFile.
+                ts.forEach(sourceFiles, emitSourceFile);
+                writeLine();
+                var sourceMappingURL = sourceMap.getSourceMappingURL();
+                if (sourceMappingURL) {
+                    write("//# sourceMappingURL=" + sourceMappingURL);
+                }
+                writeEmittedFiles(writer.getText(), jsFilePath, sourceMapFilePath, /*writeByteOrderMark*/ compilerOptions.emitBOM, sourceFiles);
+                // reset the state
+                sourceMap.reset();
+                writer.reset();
+                currentSourceFile = undefined;
+                currentText = undefined;
+                currentLineMap = undefined;
+                exportFunctionForFile = undefined;
+                contextObjectForFile = undefined;
+                generatedNameSet = undefined;
+                nodeToGeneratedName = undefined;
+                decoratedClassAliases = undefined;
+                computedPropertyNamesToGeneratedNames = undefined;
+                convertedLoopState = undefined;
+                extendsEmitted = false;
+                decorateEmitted = false;
+                paramEmitted = false;
+                awaiterEmitted = false;
+                assignEmitted = false;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                externalImports = undefined;
+                exportSpecifiers = undefined;
+                exportEquals = undefined;
+                hasExportStarsToExportValues = undefined;
+                detachedCommentsInfo = undefined;
+                sourceMapData = undefined;
+                isEs6Module = false;
+                renamedDependencies = undefined;
+                isCurrentFileExternalModule = false;
+            }
+            function emitSourceFile(sourceFile) {
+                currentSourceFile = sourceFile;
+                currentText = sourceFile.text;
+                currentLineMap = ts.getLineStarts(sourceFile);
+                exportFunctionForFile = undefined;
+                contextObjectForFile = undefined;
+                isEs6Module = sourceFile.symbol && sourceFile.symbol.exports && !!sourceFile.symbol.exports["___esModule"];
+                renamedDependencies = sourceFile.renamedDependencies;
+                currentFileIdentifiers = sourceFile.identifiers;
+                isCurrentFileExternalModule = ts.isExternalModule(sourceFile);
+                setSourceFile(sourceFile);
+                emitNodeWithCommentsAndWithoutSourcemap(sourceFile);
+            }
+            function isUniqueName(name) {
+                return !resolver.hasGlobalName(name) &&
+                    !ts.hasProperty(currentFileIdentifiers, name) &&
+                    !ts.hasProperty(generatedNameSet, name);
+            }
+            // Return the next available name in the pattern _a ... _z, _0, _1, ...
+            // TempFlags._i or TempFlags._n may be used to express a preference for that dedicated name.
+            // Note that names generated by makeTempVariableName and makeUniqueName will never conflict.
+            function makeTempVariableName(flags) {
+                if (flags && !(tempFlags & flags)) {
+                    var name_24 = flags === 268435456 /* _i */ ? "_i" : "_n";
+                    if (isUniqueName(name_24)) {
+                        tempFlags |= flags;
+                        return name_24;
+                    }
+                }
+                while (true) {
+                    var count = tempFlags & 268435455 /* CountMask */;
+                    tempFlags++;
+                    // Skip over 'i' and 'n'
+                    if (count !== 8 && count !== 13) {
+                        var name_25 = count < 26 ? "_" + String.fromCharCode(97 /* a */ + count) : "_" + (count - 26);
+                        if (isUniqueName(name_25)) {
+                            return name_25;
+                        }
+                    }
+                }
+            }
+            // Generate a name that is unique within the current file and doesn't conflict with any names
+            // in global scope. The name is formed by adding an '_n' suffix to the specified base name,
+            // where n is a positive integer. Note that names generated by makeTempVariableName and
+            // makeUniqueName are guaranteed to never conflict.
+            function makeUniqueName(baseName) {
+                // Find the first unique 'name_n', where n is a positive number
+                if (baseName.charCodeAt(baseName.length - 1) !== 95 /* _ */) {
+                    baseName += "_";
+                }
+                var i = 1;
+                while (true) {
+                    var generatedName = baseName + i;
+                    if (isUniqueName(generatedName)) {
+                        return generatedNameSet[generatedName] = generatedName;
+                    }
+                    i++;
+                }
+            }
+            function generateNameForModuleOrEnum(node) {
+                var name = node.name.text;
+                // Use module/enum name itself if it is unique, otherwise make a unique variation
+                return isUniqueLocalName(name, node) ? name : makeUniqueName(name);
+            }
+            function generateNameForImportOrExportDeclaration(node) {
+                var expr = ts.getExternalModuleName(node);
+                var baseName = expr.kind === 9 /* StringLiteral */ ?
+                    ts.escapeIdentifier(ts.makeIdentifierFromModuleName(expr.text)) : "module";
+                return makeUniqueName(baseName);
+            }
+            function generateNameForExportDefault() {
+                return makeUniqueName("default");
+            }
+            function generateNameForClassExpression() {
+                return makeUniqueName("class");
+            }
+            function generateNameForNode(node) {
+                switch (node.kind) {
+                    case 69 /* Identifier */:
+                        return makeUniqueName(node.text);
+                    case 225 /* ModuleDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                        return generateNameForModuleOrEnum(node);
+                    case 230 /* ImportDeclaration */:
+                    case 236 /* ExportDeclaration */:
+                        return generateNameForImportOrExportDeclaration(node);
+                    case 220 /* FunctionDeclaration */:
+                    case 221 /* ClassDeclaration */:
+                    case 235 /* ExportAssignment */:
+                        return generateNameForExportDefault();
+                    case 192 /* ClassExpression */:
+                        return generateNameForClassExpression();
+                }
+            }
+            function getGeneratedNameForNode(node) {
+                var id = ts.getNodeId(node);
+                return nodeToGeneratedName[id] || (nodeToGeneratedName[id] = ts.unescapeIdentifier(generateNameForNode(node)));
+            }
+            /** Write emitted output to disk */
+            function writeEmittedFiles(emitOutput, jsFilePath, sourceMapFilePath, writeByteOrderMark, sourceFiles) {
+                if (compilerOptions.sourceMap && !compilerOptions.inlineSourceMap) {
+                    ts.writeFile(host, emitterDiagnostics, sourceMapFilePath, sourceMap.getText(), /*writeByteOrderMark*/ false, sourceFiles);
+                }
+                if (sourceMapDataList) {
+                    sourceMapDataList.push(sourceMap.getSourceMapData());
+                }
+                ts.writeFile(host, emitterDiagnostics, jsFilePath, emitOutput, writeByteOrderMark, sourceFiles);
+            }
+            // Create a temporary variable with a unique unused name.
+            function createTempVariable(flags) {
+                var result = ts.createSynthesizedNode(69 /* Identifier */);
+                result.text = makeTempVariableName(flags);
+                return result;
+            }
+            function recordTempDeclaration(name) {
+                if (!tempVariables) {
+                    tempVariables = [];
+                }
+                tempVariables.push(name);
+            }
+            function createAndRecordTempVariable(flags) {
+                var temp = createTempVariable(flags);
+                recordTempDeclaration(temp);
+                return temp;
+            }
+            function emitTempDeclarations(newLine) {
+                if (tempVariables) {
+                    if (newLine) {
+                        writeLine();
+                    }
+                    else {
+                        write(" ");
+                    }
+                    write("var ");
+                    emitCommaList(tempVariables);
+                    write(";");
+                }
+            }
+            /** Emit the text for the given token that comes after startPos
+              * This by default writes the text provided with the given tokenKind
+              * but if optional emitFn callback is provided the text is emitted using the callback instead of default text
+              * @param tokenKind the kind of the token to search and emit
+              * @param startPos the position in the source to start searching for the token
+              * @param emitFn if given will be invoked to emit the text instead of actual token emit */
+            function emitToken(tokenKind, startPos, emitFn) {
+                var tokenStartPos = ts.skipTrivia(currentText, startPos);
+                emitPos(tokenStartPos);
+                var tokenString = ts.tokenToString(tokenKind);
+                if (emitFn) {
+                    emitFn();
+                }
+                else {
+                    write(tokenString);
+                }
+                var tokenEndPos = tokenStartPos + tokenString.length;
+                emitPos(tokenEndPos);
+                return tokenEndPos;
+            }
+            function emitOptional(prefix, node) {
+                if (node) {
+                    write(prefix);
+                    emit(node);
+                }
+            }
+            function emitParenthesizedIf(node, parenthesized) {
+                if (parenthesized) {
+                    write("(");
+                }
+                emit(node);
+                if (parenthesized) {
+                    write(")");
+                }
+            }
+            function emitLinePreservingList(parent, nodes, allowTrailingComma, spacesBetweenBraces) {
+                ts.Debug.assert(nodes.length > 0);
+                increaseIndent();
+                if (nodeStartPositionsAreOnSameLine(parent, nodes[0])) {
+                    if (spacesBetweenBraces) {
+                        write(" ");
+                    }
+                }
+                else {
+                    writeLine();
+                }
+                for (var i = 0, n = nodes.length; i < n; i++) {
+                    if (i) {
+                        if (nodeEndIsOnSameLineAsNodeStart(nodes[i - 1], nodes[i])) {
+                            write(", ");
+                        }
+                        else {
+                            write(",");
+                            writeLine();
+                        }
+                    }
+                    emit(nodes[i]);
+                }
+                if (nodes.hasTrailingComma && allowTrailingComma) {
+                    write(",");
+                }
+                decreaseIndent();
+                if (nodeEndPositionsAreOnSameLine(parent, ts.lastOrUndefined(nodes))) {
+                    if (spacesBetweenBraces) {
+                        write(" ");
+                    }
+                }
+                else {
+                    writeLine();
+                }
+            }
+            function emitList(nodes, start, count, multiLine, trailingComma, leadingComma, noTrailingNewLine, emitNode) {
+                if (!emitNode) {
+                    emitNode = emit;
+                }
+                for (var i = 0; i < count; i++) {
+                    if (multiLine) {
+                        if (i || leadingComma) {
+                            write(",");
+                        }
+                        writeLine();
+                    }
+                    else {
+                        if (i || leadingComma) {
+                            write(", ");
+                        }
+                    }
+                    var node = nodes[start + i];
+                    // This emitting is to make sure we emit following comment properly
+                    //   ...(x, /*comment1*/ y)...
+                    //         ^ => node.pos
+                    // "comment1" is not considered leading comment for "y" but rather
+                    // considered as trailing comment of the previous node.
+                    emitTrailingCommentsOfPosition(node.pos);
+                    emitNode(node);
+                    leadingComma = true;
+                }
+                if (trailingComma) {
+                    write(",");
+                }
+                if (multiLine && !noTrailingNewLine) {
+                    writeLine();
+                }
+                return count;
+            }
+            function emitCommaList(nodes) {
+                if (nodes) {
+                    emitList(nodes, 0, nodes.length, /*multiLine*/ false, /*trailingComma*/ false);
+                }
+            }
+            function emitLines(nodes) {
+                emitLinesStartingAt(nodes, /*startIndex*/ 0);
+            }
+            function emitLinesStartingAt(nodes, startIndex) {
+                for (var i = startIndex; i < nodes.length; i++) {
+                    writeLine();
+                    emit(nodes[i]);
+                }
+            }
+            function isBinaryOrOctalIntegerLiteral(node, text) {
+                if (node.kind === 8 /* NumericLiteral */ && text.length > 1) {
+                    switch (text.charCodeAt(1)) {
+                        case 98 /* b */:
+                        case 66 /* B */:
+                        case 111 /* o */:
+                        case 79 /* O */:
+                            return true;
+                    }
+                }
+                return false;
+            }
+            function emitLiteral(node) {
+                var text = getLiteralText(node);
+                if ((compilerOptions.sourceMap || compilerOptions.inlineSourceMap) && (node.kind === 9 /* StringLiteral */ || ts.isTemplateLiteralKind(node.kind))) {
+                    writer.writeLiteral(text);
+                }
+                else if (languageVersion < 2 /* ES6 */ && isBinaryOrOctalIntegerLiteral(node, text)) {
+                    write(node.text);
+                }
+                else {
+                    write(text);
+                }
+            }
+            function getLiteralText(node) {
+                // Any template literal or string literal with an extended escape
+                // (e.g. "\u{0067}") will need to be downleveled as a escaped string literal.
+                if (languageVersion < 2 /* ES6 */ && (ts.isTemplateLiteralKind(node.kind) || node.hasExtendedUnicodeEscape)) {
+                    return getQuotedEscapedLiteralText('"', node.text, '"');
+                }
+                // If we don't need to downlevel and we can reach the original source text using
+                // the node's parent reference, then simply get the text as it was originally written.
+                if (node.parent) {
+                    return ts.getTextOfNodeFromSourceText(currentText, node);
+                }
+                // If we can't reach the original source text, use the canonical form if it's a number,
+                // or an escaped quoted form of the original text if it's string-like.
+                switch (node.kind) {
+                    case 9 /* StringLiteral */:
+                        return getQuotedEscapedLiteralText('"', node.text, '"');
+                    case 11 /* NoSubstitutionTemplateLiteral */:
+                        return getQuotedEscapedLiteralText("`", node.text, "`");
+                    case 12 /* TemplateHead */:
+                        return getQuotedEscapedLiteralText("`", node.text, "${");
+                    case 13 /* TemplateMiddle */:
+                        return getQuotedEscapedLiteralText("}", node.text, "${");
+                    case 14 /* TemplateTail */:
+                        return getQuotedEscapedLiteralText("}", node.text, "`");
+                    case 8 /* NumericLiteral */:
+                        return node.text;
+                }
+                ts.Debug.fail("Literal kind '" + node.kind + "' not accounted for.");
+            }
+            function getQuotedEscapedLiteralText(leftQuote, text, rightQuote) {
+                return leftQuote + ts.escapeNonAsciiCharacters(ts.escapeString(text)) + rightQuote;
+            }
+            function emitDownlevelRawTemplateLiteral(node) {
+                // Find original source text, since we need to emit the raw strings of the tagged template.
+                // The raw strings contain the (escaped) strings of what the user wrote.
+                // Examples: `\n` is converted to "\\n", a template string with a newline to "\n".
+                var text = ts.getTextOfNodeFromSourceText(currentText, node);
+                // text contains the original source, it will also contain quotes ("`"), dollar signs and braces ("${" and "}"),
+                // thus we need to remove those characters.
+                // First template piece starts with "`", others with "}"
+                // Last template piece ends with "`", others with "${"
+                var isLast = node.kind === 11 /* NoSubstitutionTemplateLiteral */ || node.kind === 14 /* TemplateTail */;
+                text = text.substring(1, text.length - (isLast ? 1 : 2));
+                // Newline normalization:
+                // ES6 Spec 11.8.6.1 - Static Semantics of TV's and TRV's
+                // <CR><LF> and <CR> LineTerminatorSequences are normalized to <LF> for both TV and TRV.
+                text = text.replace(/\r\n?/g, "\n");
+                text = ts.escapeString(text);
+                write("\"" + text + "\"");
+            }
+            function emitDownlevelTaggedTemplateArray(node, literalEmitter) {
+                write("[");
+                if (node.template.kind === 11 /* NoSubstitutionTemplateLiteral */) {
+                    literalEmitter(node.template);
+                }
+                else {
+                    literalEmitter(node.template.head);
+                    ts.forEach(node.template.templateSpans, function (child) {
+                        write(", ");
+                        literalEmitter(child.literal);
+                    });
+                }
+                write("]");
+            }
+            function emitDownlevelTaggedTemplate(node) {
+                var tempVariable = createAndRecordTempVariable(0 /* Auto */);
+                write("(");
+                emit(tempVariable);
+                write(" = ");
+                emitDownlevelTaggedTemplateArray(node, emit);
+                write(", ");
+                emit(tempVariable);
+                write(".raw = ");
+                emitDownlevelTaggedTemplateArray(node, emitDownlevelRawTemplateLiteral);
+                write(", ");
+                emitParenthesizedIf(node.tag, needsParenthesisForPropertyAccessOrInvocation(node.tag));
+                write("(");
+                emit(tempVariable);
+                // Now we emit the expressions
+                if (node.template.kind === 189 /* TemplateExpression */) {
+                    ts.forEach(node.template.templateSpans, function (templateSpan) {
+                        write(", ");
+                        var needsParens = templateSpan.expression.kind === 187 /* BinaryExpression */
+                            && templateSpan.expression.operatorToken.kind === 24 /* CommaToken */;
+                        emitParenthesizedIf(templateSpan.expression, needsParens);
+                    });
+                }
+                write("))");
+            }
+            function emitTemplateExpression(node) {
+                // In ES6 mode and above, we can simply emit each portion of a template in order, but in
+                // ES3 & ES5 we must convert the template expression into a series of string concatenations.
+                if (languageVersion >= 2 /* ES6 */) {
+                    ts.forEachChild(node, emit);
+                    return;
+                }
+                var emitOuterParens = ts.isExpression(node.parent)
+                    && templateNeedsParens(node, node.parent);
+                if (emitOuterParens) {
+                    write("(");
+                }
+                var headEmitted = false;
+                if (shouldEmitTemplateHead()) {
+                    emitLiteral(node.head);
+                    headEmitted = true;
+                }
+                for (var i = 0, n = node.templateSpans.length; i < n; i++) {
+                    var templateSpan = node.templateSpans[i];
+                    // Check if the expression has operands and binds its operands less closely than binary '+'.
+                    // If it does, we need to wrap the expression in parentheses. Otherwise, something like
+                    //    `abc${ 1 << 2 }`
+                    // becomes
+                    //    "abc" + 1 << 2 + ""
+                    // which is really
+                    //    ("abc" + 1) << (2 + "")
+                    // rather than
+                    //    "abc" + (1 << 2) + ""
+                    var needsParens = templateSpan.expression.kind !== 178 /* ParenthesizedExpression */
+                        && comparePrecedenceToBinaryPlus(templateSpan.expression) !== 1 /* GreaterThan */;
+                    if (i > 0 || headEmitted) {
+                        // If this is the first span and the head was not emitted, then this templateSpan's
+                        // expression will be the first to be emitted. Don't emit the preceding ' + ' in that
+                        // case.
+                        write(" + ");
+                    }
+                    emitParenthesizedIf(templateSpan.expression, needsParens);
+                    // Only emit if the literal is non-empty.
+                    // The binary '+' operator is left-associative, so the first string concatenation
+                    // with the head will force the result up to this point to be a string.
+                    // Emitting a '+ ""' has no semantic effect for middles and tails.
+                    if (templateSpan.literal.text.length !== 0) {
+                        write(" + ");
+                        emitLiteral(templateSpan.literal);
+                    }
+                }
+                if (emitOuterParens) {
+                    write(")");
+                }
+                function shouldEmitTemplateHead() {
+                    // If this expression has an empty head literal and the first template span has a non-empty
+                    // literal, then emitting the empty head literal is not necessary.
+                    //     `${ foo } and ${ bar }`
+                    // can be emitted as
+                    //     foo + " and " + bar
+                    // This is because it is only required that one of the first two operands in the emit
+                    // output must be a string literal, so that the other operand and all following operands
+                    // are forced into strings.
+                    //
+                    // If the first template span has an empty literal, then the head must still be emitted.
+                    //     `${ foo }${ bar }`
+                    // must still be emitted as
+                    //     "" + foo + bar
+                    // There is always atleast one templateSpan in this code path, since
+                    // NoSubstitutionTemplateLiterals are directly emitted via emitLiteral()
+                    ts.Debug.assert(node.templateSpans.length !== 0);
+                    return node.head.text.length !== 0 || node.templateSpans[0].literal.text.length === 0;
+                }
+                function templateNeedsParens(template, parent) {
+                    switch (parent.kind) {
+                        case 174 /* CallExpression */:
+                        case 175 /* NewExpression */:
+                            return parent.expression === template;
+                        case 176 /* TaggedTemplateExpression */:
+                        case 178 /* ParenthesizedExpression */:
+                            return false;
+                        default:
+                            return comparePrecedenceToBinaryPlus(parent) !== -1 /* LessThan */;
+                    }
+                }
+                /**
+                 * Returns whether the expression has lesser, greater,
+                 * or equal precedence to the binary '+' operator
+                 */
+                function comparePrecedenceToBinaryPlus(expression) {
+                    // All binary expressions have lower precedence than '+' apart from '*', '/', and '%'
+                    // which have greater precedence and '-' which has equal precedence.
+                    // All unary operators have a higher precedence apart from yield.
+                    // Arrow functions and conditionals have a lower precedence,
+                    // although we convert the former into regular function expressions in ES5 mode,
+                    // and in ES6 mode this function won't get called anyway.
+                    //
+                    // TODO (drosen): Note that we need to account for the upcoming 'yield' and
+                    //                spread ('...') unary operators that are anticipated for ES6.
+                    switch (expression.kind) {
+                        case 187 /* BinaryExpression */:
+                            switch (expression.operatorToken.kind) {
+                                case 37 /* AsteriskToken */:
+                                case 39 /* SlashToken */:
+                                case 40 /* PercentToken */:
+                                    return 1 /* GreaterThan */;
+                                case 35 /* PlusToken */:
+                                case 36 /* MinusToken */:
+                                    return 0 /* EqualTo */;
+                                default:
+                                    return -1 /* LessThan */;
+                            }
+                        case 190 /* YieldExpression */:
+                        case 188 /* ConditionalExpression */:
+                            return -1 /* LessThan */;
+                        default:
+                            return 1 /* GreaterThan */;
+                    }
+                }
+            }
+            function emitTemplateSpan(span) {
+                emit(span.expression);
+                emit(span.literal);
+            }
+            function jsxEmitReact(node) {
+                /// Emit a tag name, which is either '"div"' for lower-cased names, or
+                /// 'Div' for upper-cased or dotted names
+                function emitTagName(name) {
+                    if (name.kind === 69 /* Identifier */ && ts.isIntrinsicJsxName(name.text)) {
+                        write('"');
+                        emit(name);
+                        write('"');
+                    }
+                    else {
+                        emit(name);
+                    }
+                }
+                /// Emit an attribute name, which is quoted if it needs to be quoted. Because
+                /// these emit into an object literal property name, we don't need to be worried
+                /// about keywords, just non-identifier characters
+                function emitAttributeName(name) {
+                    if (/^[A-Za-z_]\w*$/.test(name.text)) {
+                        emit(name);
+                    }
+                    else {
+                        write('"');
+                        emit(name);
+                        write('"');
+                    }
+                }
+                /// Emit an name/value pair for an attribute (e.g. "x: 3")
+                function emitJsxAttribute(node) {
+                    emitAttributeName(node.name);
+                    write(": ");
+                    if (node.initializer) {
+                        emit(node.initializer);
+                    }
+                    else {
+                        write("true");
+                    }
+                }
+                function emitJsxElement(openingNode, children) {
+                    var syntheticReactRef = ts.createSynthesizedNode(69 /* Identifier */);
+                    syntheticReactRef.text = compilerOptions.reactNamespace ? compilerOptions.reactNamespace : "React";
+                    syntheticReactRef.parent = openingNode;
+                    // Call React.createElement(tag, ...
+                    emitLeadingComments(openingNode);
+                    emitExpressionIdentifier(syntheticReactRef);
+                    write(".createElement(");
+                    emitTagName(openingNode.tagName);
+                    write(", ");
+                    // Attribute list
+                    if (openingNode.attributes.length === 0) {
+                        // When there are no attributes, React wants "null"
+                        write("null");
+                    }
+                    else {
+                        // Either emit one big object literal (no spread attribs), or
+                        // a call to the __assign helper
+                        var attrs = openingNode.attributes;
+                        if (ts.forEach(attrs, function (attr) { return attr.kind === 247 /* JsxSpreadAttribute */; })) {
+                            write("__assign(");
+                            var haveOpenedObjectLiteral = false;
+                            for (var i = 0; i < attrs.length; i++) {
+                                if (attrs[i].kind === 247 /* JsxSpreadAttribute */) {
+                                    // If this is the first argument, we need to emit a {} as the first argument
+                                    if (i === 0) {
+                                        write("{}, ");
+                                    }
+                                    if (haveOpenedObjectLiteral) {
+                                        write("}");
+                                        haveOpenedObjectLiteral = false;
+                                    }
+                                    if (i > 0) {
+                                        write(", ");
+                                    }
+                                    emit(attrs[i].expression);
+                                }
+                                else {
+                                    ts.Debug.assert(attrs[i].kind === 246 /* JsxAttribute */);
+                                    if (haveOpenedObjectLiteral) {
+                                        write(", ");
+                                    }
+                                    else {
+                                        haveOpenedObjectLiteral = true;
+                                        if (i > 0) {
+                                            write(", ");
+                                        }
+                                        write("{");
+                                    }
+                                    emitJsxAttribute(attrs[i]);
+                                }
+                            }
+                            if (haveOpenedObjectLiteral)
+                                write("}");
+                            write(")"); // closing paren to React.__spread(
+                        }
+                        else {
+                            // One object literal with all the attributes in them
+                            write("{");
+                            for (var i = 0, n = attrs.length; i < n; i++) {
+                                if (i > 0) {
+                                    write(", ");
+                                }
+                                emitJsxAttribute(attrs[i]);
+                            }
+                            write("}");
+                        }
+                    }
+                    // Children
+                    if (children) {
+                        var firstChild = void 0;
+                        var multipleEmittableChildren = false;
+                        for (var i = 0, n = children.length; i < n; i++) {
+                            var jsxChild = children[i];
+                            if (isJsxChildEmittable(jsxChild)) {
+                                // we need to decide whether to emit in single line or multiple lines as indented list
+                                // store firstChild reference, if we see another emittable child, then emit accordingly
+                                if (!firstChild) {
+                                    write(", ");
+                                    firstChild = jsxChild;
+                                }
+                                else {
+                                    // more than one emittable child, emit indented list
+                                    if (!multipleEmittableChildren) {
+                                        multipleEmittableChildren = true;
+                                        increaseIndent();
+                                        writeLine();
+                                        emit(firstChild);
+                                    }
+                                    write(", ");
+                                    writeLine();
+                                    emit(jsxChild);
+                                }
+                            }
+                        }
+                        if (multipleEmittableChildren) {
+                            decreaseIndent();
+                        }
+                        else if (firstChild) {
+                            if (firstChild.kind !== 241 /* JsxElement */ && firstChild.kind !== 242 /* JsxSelfClosingElement */) {
+                                emit(firstChild);
+                            }
+                            else {
+                                // If the only child is jsx element, put it on a new indented line
+                                increaseIndent();
+                                writeLine();
+                                emit(firstChild);
+                                writeLine();
+                                decreaseIndent();
+                            }
+                        }
+                    }
+                    // Closing paren
+                    write(")"); // closes "React.createElement("
+                    emitTrailingComments(openingNode);
+                }
+                if (node.kind === 241 /* JsxElement */) {
+                    emitJsxElement(node.openingElement, node.children);
+                }
+                else {
+                    ts.Debug.assert(node.kind === 242 /* JsxSelfClosingElement */);
+                    emitJsxElement(node);
+                }
+            }
+            function jsxEmitPreserve(node) {
+                function emitJsxAttribute(node) {
+                    emit(node.name);
+                    if (node.initializer) {
+                        write("=");
+                        emit(node.initializer);
+                    }
+                }
+                function emitJsxSpreadAttribute(node) {
+                    write("{...");
+                    emit(node.expression);
+                    write("}");
+                }
+                function emitAttributes(attribs) {
+                    for (var i = 0, n = attribs.length; i < n; i++) {
+                        if (i > 0) {
+                            write(" ");
+                        }
+                        if (attribs[i].kind === 247 /* JsxSpreadAttribute */) {
+                            emitJsxSpreadAttribute(attribs[i]);
+                        }
+                        else {
+                            ts.Debug.assert(attribs[i].kind === 246 /* JsxAttribute */);
+                            emitJsxAttribute(attribs[i]);
+                        }
+                    }
+                }
+                function emitJsxOpeningOrSelfClosingElement(node) {
+                    write("<");
+                    emit(node.tagName);
+                    if (node.attributes.length > 0 || (node.kind === 242 /* JsxSelfClosingElement */)) {
+                        write(" ");
+                    }
+                    emitAttributes(node.attributes);
+                    if (node.kind === 242 /* JsxSelfClosingElement */) {
+                        write("/>");
+                    }
+                    else {
+                        write(">");
+                    }
+                }
+                function emitJsxClosingElement(node) {
+                    write("</");
+                    emit(node.tagName);
+                    write(">");
+                }
+                function emitJsxElement(node) {
+                    emitJsxOpeningOrSelfClosingElement(node.openingElement);
+                    for (var i = 0, n = node.children.length; i < n; i++) {
+                        emit(node.children[i]);
+                    }
+                    emitJsxClosingElement(node.closingElement);
+                }
+                if (node.kind === 241 /* JsxElement */) {
+                    emitJsxElement(node);
+                }
+                else {
+                    ts.Debug.assert(node.kind === 242 /* JsxSelfClosingElement */);
+                    emitJsxOpeningOrSelfClosingElement(node);
+                }
+            }
+            // This function specifically handles numeric/string literals for enum and accessor 'identifiers'.
+            // In a sense, it does not actually emit identifiers as much as it declares a name for a specific property.
+            // For example, this is utilized when feeding in a result to Object.defineProperty.
+            function emitExpressionForPropertyName(node) {
+                ts.Debug.assert(node.kind !== 169 /* BindingElement */);
+                if (node.kind === 9 /* StringLiteral */) {
+                    emitLiteral(node);
+                }
+                else if (node.kind === 140 /* ComputedPropertyName */) {
+                    // if this is a decorated computed property, we will need to capture the result
+                    // of the property expression so that we can apply decorators later. This is to ensure
+                    // we don't introduce unintended side effects:
+                    //
+                    //   class C {
+                    //     [_a = x]() { }
+                    //   }
+                    //
+                    // The emit for the decorated computed property decorator is:
+                    //
+                    //   __decorate([dec], C.prototype, _a, Object.getOwnPropertyDescriptor(C.prototype, _a));
+                    //
+                    if (ts.nodeIsDecorated(node.parent)) {
+                        if (!computedPropertyNamesToGeneratedNames) {
+                            computedPropertyNamesToGeneratedNames = [];
+                        }
+                        var generatedName = computedPropertyNamesToGeneratedNames[ts.getNodeId(node)];
+                        if (generatedName) {
+                            // we have already generated a variable for this node, write that value instead.
+                            write(generatedName);
+                            return;
+                        }
+                        generatedName = createAndRecordTempVariable(0 /* Auto */).text;
+                        computedPropertyNamesToGeneratedNames[ts.getNodeId(node)] = generatedName;
+                        write(generatedName);
+                        write(" = ");
+                    }
+                    emit(node.expression);
+                }
+                else {
+                    write('"');
+                    if (node.kind === 8 /* NumericLiteral */) {
+                        write(node.text);
+                    }
+                    else {
+                        writeTextOfNode(currentText, node);
+                    }
+                    write('"');
+                }
+            }
+            function isExpressionIdentifier(node) {
+                var parent = node.parent;
+                switch (parent.kind) {
+                    case 170 /* ArrayLiteralExpression */:
+                    case 195 /* AsExpression */:
+                    case 184 /* AwaitExpression */:
+                    case 187 /* BinaryExpression */:
+                    case 174 /* CallExpression */:
+                    case 249 /* CaseClause */:
+                    case 140 /* ComputedPropertyName */:
+                    case 188 /* ConditionalExpression */:
+                    case 143 /* Decorator */:
+                    case 181 /* DeleteExpression */:
+                    case 204 /* DoStatement */:
+                    case 173 /* ElementAccessExpression */:
+                    case 235 /* ExportAssignment */:
+                    case 202 /* ExpressionStatement */:
+                    case 194 /* ExpressionWithTypeArguments */:
+                    case 206 /* ForStatement */:
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                    case 203 /* IfStatement */:
+                    case 245 /* JsxClosingElement */:
+                    case 242 /* JsxSelfClosingElement */:
+                    case 243 /* JsxOpeningElement */:
+                    case 247 /* JsxSpreadAttribute */:
+                    case 248 /* JsxExpression */:
+                    case 175 /* NewExpression */:
+                    case 196 /* NonNullExpression */:
+                    case 178 /* ParenthesizedExpression */:
+                    case 186 /* PostfixUnaryExpression */:
+                    case 185 /* PrefixUnaryExpression */:
+                    case 211 /* ReturnStatement */:
+                    case 254 /* ShorthandPropertyAssignment */:
+                    case 191 /* SpreadElementExpression */:
+                    case 213 /* SwitchStatement */:
+                    case 176 /* TaggedTemplateExpression */:
+                    case 197 /* TemplateSpan */:
+                    case 215 /* ThrowStatement */:
+                    case 177 /* TypeAssertionExpression */:
+                    case 182 /* TypeOfExpression */:
+                    case 183 /* VoidExpression */:
+                    case 205 /* WhileStatement */:
+                    case 212 /* WithStatement */:
+                    case 190 /* YieldExpression */:
+                        return true;
+                    case 169 /* BindingElement */:
+                    case 255 /* EnumMember */:
+                    case 142 /* Parameter */:
+                    case 253 /* PropertyAssignment */:
+                    case 145 /* PropertyDeclaration */:
+                    case 218 /* VariableDeclaration */:
+                        return parent.initializer === node;
+                    case 172 /* PropertyAccessExpression */:
+                        return parent.expression === node;
+                    case 180 /* ArrowFunction */:
+                    case 179 /* FunctionExpression */:
+                        return parent.body === node;
+                    case 229 /* ImportEqualsDeclaration */:
+                        return parent.moduleReference === node;
+                    case 139 /* QualifiedName */:
+                        return parent.left === node;
+                }
+                return false;
+            }
+            function emitExpressionIdentifier(node) {
+                var container = resolver.getReferencedExportContainer(node);
+                if (container) {
+                    if (container.kind === 256 /* SourceFile */) {
+                        // Identifier references module export
+                        if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
+                            write("exports.");
+                        }
+                    }
+                    else {
+                        // Identifier references namespace export
+                        write(getGeneratedNameForNode(container));
+                        write(".");
+                    }
+                }
+                else {
+                    if (modulekind !== ts.ModuleKind.ES6) {
+                        var declaration = resolver.getReferencedImportDeclaration(node);
+                        if (declaration) {
+                            if (declaration.kind === 231 /* ImportClause */) {
+                                // Identifier references default import
+                                write(getGeneratedNameForNode(declaration.parent));
+                                write(languageVersion === 0 /* ES3 */ ? '["default"]' : ".default");
+                                return;
+                            }
+                            else if (declaration.kind === 234 /* ImportSpecifier */) {
+                                // Identifier references named import
+                                write(getGeneratedNameForNode(declaration.parent.parent.parent));
+                                var name_26 = declaration.propertyName || declaration.name;
+                                var identifier = ts.getTextOfNodeFromSourceText(currentText, name_26);
+                                if (languageVersion === 0 /* ES3 */ && identifier === "default") {
+                                    write('["default"]');
+                                }
+                                else {
+                                    write(".");
+                                    write(identifier);
+                                }
+                                return;
+                            }
+                        }
+                    }
+                    if (languageVersion < 2 /* ES6 */) {
+                        var declaration = resolver.getReferencedDeclarationWithCollidingName(node);
+                        if (declaration) {
+                            write(getGeneratedNameForNode(declaration.name));
+                            return;
+                        }
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & 1048576 /* BodyScopedClassBinding */) {
+                        // Due to the emit for class decorators, any reference to the class from inside of the class body
+                        // must instead be rewritten to point to a temporary variable to avoid issues with the double-bind
+                        // behavior of class names in ES6.
+                        var declaration = resolver.getReferencedValueDeclaration(node);
+                        if (declaration) {
+                            var classAlias = decoratedClassAliases[ts.getNodeId(declaration)];
+                            if (classAlias !== undefined) {
+                                write(classAlias);
+                                return;
+                            }
+                        }
+                    }
+                }
+                if (ts.nodeIsSynthesized(node)) {
+                    write(node.text);
+                }
+                else {
+                    writeTextOfNode(currentText, node);
+                }
+            }
+            function isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node) {
+                if (languageVersion < 2 /* ES6 */) {
+                    var parent_13 = node.parent;
+                    switch (parent_13.kind) {
+                        case 169 /* BindingElement */:
+                        case 221 /* ClassDeclaration */:
+                        case 224 /* EnumDeclaration */:
+                        case 218 /* VariableDeclaration */:
+                            return parent_13.name === node && resolver.isDeclarationWithCollidingName(parent_13);
+                    }
+                }
+                return false;
+            }
+            function emitIdentifier(node) {
+                if (convertedLoopState) {
+                    if (node.text == "arguments" && resolver.isArgumentsLocalBinding(node)) {
+                        // in converted loop body arguments cannot be used directly.
+                        var name_27 = convertedLoopState.argumentsName || (convertedLoopState.argumentsName = makeUniqueName("arguments"));
+                        write(name_27);
+                        return;
+                    }
+                }
+                if (!node.parent) {
+                    write(node.text);
+                }
+                else if (isExpressionIdentifier(node)) {
+                    emitExpressionIdentifier(node);
+                }
+                else if (isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(node)) {
+                    write(getGeneratedNameForNode(node));
+                }
+                else if (ts.nodeIsSynthesized(node)) {
+                    write(node.text);
+                }
+                else {
+                    writeTextOfNode(currentText, node);
+                }
+            }
+            function emitThis(node) {
+                if (resolver.getNodeCheckFlags(node) & 2 /* LexicalThis */) {
+                    write("_this");
+                }
+                else if (convertedLoopState) {
+                    write(convertedLoopState.thisName || (convertedLoopState.thisName = makeUniqueName("this")));
+                }
+                else {
+                    write("this");
+                }
+            }
+            function emitSuper(node) {
+                if (languageVersion >= 2 /* ES6 */) {
+                    write("super");
+                }
+                else {
+                    var flags = resolver.getNodeCheckFlags(node);
+                    if (flags & 256 /* SuperInstance */) {
+                        write("_super.prototype");
+                    }
+                    else {
+                        write("_super");
+                    }
+                }
+            }
+            function emitObjectBindingPattern(node) {
+                write("{ ");
+                var elements = node.elements;
+                emitList(elements, 0, elements.length, /*multiLine*/ false, /*trailingComma*/ elements.hasTrailingComma);
+                write(" }");
+            }
+            function emitArrayBindingPattern(node) {
+                write("[");
+                var elements = node.elements;
+                emitList(elements, 0, elements.length, /*multiLine*/ false, /*trailingComma*/ elements.hasTrailingComma);
+                write("]");
+            }
+            function emitBindingElement(node) {
+                if (node.propertyName) {
+                    emit(node.propertyName);
+                    write(": ");
+                }
+                if (node.dotDotDotToken) {
+                    write("...");
+                }
+                if (ts.isBindingPattern(node.name)) {
+                    emit(node.name);
+                }
+                else {
+                    emitModuleMemberName(node);
+                }
+                emitOptional(" = ", node.initializer);
+            }
+            function emitSpreadElementExpression(node) {
+                write("...");
+                emit(node.expression);
+            }
+            function emitYieldExpression(node) {
+                write(ts.tokenToString(114 /* YieldKeyword */));
+                if (node.asteriskToken) {
+                    write("*");
+                }
+                if (node.expression) {
+                    write(" ");
+                    emit(node.expression);
+                }
+            }
+            function emitAwaitExpression(node) {
+                var needsParenthesis = needsParenthesisForAwaitExpressionAsYield(node);
+                if (needsParenthesis) {
+                    write("(");
+                }
+                write(ts.tokenToString(114 /* YieldKeyword */));
+                write(" ");
+                emit(node.expression);
+                if (needsParenthesis) {
+                    write(")");
+                }
+            }
+            function needsParenthesisForAwaitExpressionAsYield(node) {
+                if (node.parent.kind === 187 /* BinaryExpression */ && !ts.isAssignmentOperator(node.parent.operatorToken.kind)) {
+                    return true;
+                }
+                else if (node.parent.kind === 188 /* ConditionalExpression */ && node.parent.condition === node) {
+                    return true;
+                }
+                return false;
+            }
+            function needsParenthesisForPropertyAccessOrInvocation(node) {
+                switch (node.kind) {
+                    case 69 /* Identifier */:
+                    case 170 /* ArrayLiteralExpression */:
+                    case 172 /* PropertyAccessExpression */:
+                    case 173 /* ElementAccessExpression */:
+                    case 174 /* CallExpression */:
+                    case 178 /* ParenthesizedExpression */:
+                        // This list is not exhaustive and only includes those cases that are relevant
+                        // to the check in emitArrayLiteral. More cases can be added as needed.
+                        return false;
+                }
+                return true;
+            }
+            function emitListWithSpread(elements, needsUniqueCopy, multiLine, trailingComma, useConcat) {
+                var pos = 0;
+                var group = 0;
+                var length = elements.length;
+                while (pos < length) {
+                    // Emit using the pattern <group0>.concat(<group1>, <group2>, ...)
+                    if (group === 1 && useConcat) {
+                        write(".concat(");
+                    }
+                    else if (group > 0) {
+                        write(", ");
+                    }
+                    var e = elements[pos];
+                    if (e.kind === 191 /* SpreadElementExpression */) {
+                        e = e.expression;
+                        emitParenthesizedIf(e, /*parenthesized*/ group === 0 && needsParenthesisForPropertyAccessOrInvocation(e));
+                        pos++;
+                        if (pos === length && group === 0 && needsUniqueCopy && e.kind !== 170 /* ArrayLiteralExpression */) {
+                            write(".slice()");
+                        }
+                    }
+                    else {
+                        var i = pos;
+                        while (i < length && elements[i].kind !== 191 /* SpreadElementExpression */) {
+                            i++;
+                        }
+                        write("[");
+                        if (multiLine) {
+                            increaseIndent();
+                        }
+                        emitList(elements, pos, i - pos, multiLine, trailingComma && i === length);
+                        if (multiLine) {
+                            decreaseIndent();
+                        }
+                        write("]");
+                        pos = i;
+                    }
+                    group++;
+                }
+                if (group > 1) {
+                    if (useConcat) {
+                        write(")");
+                    }
+                }
+            }
+            function isSpreadElementExpression(node) {
+                return node.kind === 191 /* SpreadElementExpression */;
+            }
+            function emitArrayLiteral(node) {
+                var elements = node.elements;
+                if (elements.length === 0) {
+                    write("[]");
+                }
+                else if (languageVersion >= 2 /* ES6 */ || !ts.forEach(elements, isSpreadElementExpression)) {
+                    write("[");
+                    emitLinePreservingList(node, node.elements, elements.hasTrailingComma, /*spacesBetweenBraces*/ false);
+                    write("]");
+                }
+                else {
+                    emitListWithSpread(elements, /*needsUniqueCopy*/ true, /*multiLine*/ node.multiLine, 
+                    /*trailingComma*/ elements.hasTrailingComma, /*useConcat*/ true);
+                }
+            }
+            function emitObjectLiteralBody(node, numElements) {
+                if (numElements === 0) {
+                    write("{}");
+                    return;
+                }
+                write("{");
+                if (numElements > 0) {
+                    var properties = node.properties;
+                    // If we are not doing a downlevel transformation for object literals,
+                    // then try to preserve the original shape of the object literal.
+                    // Otherwise just try to preserve the formatting.
+                    if (numElements === properties.length) {
+                        emitLinePreservingList(node, properties, /*allowTrailingComma*/ languageVersion >= 1 /* ES5 */, /*spacesBetweenBraces*/ true);
+                    }
+                    else {
+                        var multiLine = node.multiLine;
+                        if (!multiLine) {
+                            write(" ");
+                        }
+                        else {
+                            increaseIndent();
+                        }
+                        emitList(properties, 0, numElements, /*multiLine*/ multiLine, /*trailingComma*/ false);
+                        if (!multiLine) {
+                            write(" ");
+                        }
+                        else {
+                            decreaseIndent();
+                        }
+                    }
+                }
+                write("}");
+            }
+            function emitDownlevelObjectLiteralWithComputedProperties(node, firstComputedPropertyIndex) {
+                var multiLine = node.multiLine;
+                var properties = node.properties;
+                write("(");
+                if (multiLine) {
+                    increaseIndent();
+                }
+                // For computed properties, we need to create a unique handle to the object
+                // literal so we can modify it without risking internal assignments tainting the object.
+                var tempVar = createAndRecordTempVariable(0 /* Auto */);
+                // Write out the first non-computed properties
+                // (or all properties if none of them are computed),
+                // then emit the rest through indexing on the temp variable.
+                emit(tempVar);
+                write(" = ");
+                emitObjectLiteralBody(node, firstComputedPropertyIndex);
+                for (var i = firstComputedPropertyIndex, n = properties.length; i < n; i++) {
+                    writeComma();
+                    var property = properties[i];
+                    emitStart(property);
+                    if (property.kind === 149 /* GetAccessor */ || property.kind === 150 /* SetAccessor */) {
+                        // TODO (drosen): Reconcile with 'emitMemberFunctions'.
+                        var accessors = ts.getAllAccessorDeclarations(node.properties, property);
+                        if (property !== accessors.firstAccessor) {
+                            continue;
+                        }
+                        write("Object.defineProperty(");
+                        emit(tempVar);
+                        write(", ");
+                        emitStart(property.name);
+                        emitExpressionForPropertyName(property.name);
+                        emitEnd(property.name);
+                        write(", {");
+                        increaseIndent();
+                        if (accessors.getAccessor) {
+                            writeLine();
+                            emitLeadingComments(accessors.getAccessor);
+                            write("get: ");
+                            emitStart(accessors.getAccessor);
+                            write("function ");
+                            emitSignatureAndBody(accessors.getAccessor);
+                            emitEnd(accessors.getAccessor);
+                            emitTrailingComments(accessors.getAccessor);
+                            write(",");
+                        }
+                        if (accessors.setAccessor) {
+                            writeLine();
+                            emitLeadingComments(accessors.setAccessor);
+                            write("set: ");
+                            emitStart(accessors.setAccessor);
+                            write("function ");
+                            emitSignatureAndBody(accessors.setAccessor);
+                            emitEnd(accessors.setAccessor);
+                            emitTrailingComments(accessors.setAccessor);
+                            write(",");
+                        }
+                        writeLine();
+                        write("enumerable: true,");
+                        writeLine();
+                        write("configurable: true");
+                        decreaseIndent();
+                        writeLine();
+                        write("})");
+                        emitEnd(property);
+                    }
+                    else {
+                        emitLeadingComments(property);
+                        emitStart(property.name);
+                        emit(tempVar);
+                        emitMemberAccessForPropertyName(property.name);
+                        emitEnd(property.name);
+                        write(" = ");
+                        if (property.kind === 253 /* PropertyAssignment */) {
+                            emit(property.initializer);
+                        }
+                        else if (property.kind === 254 /* ShorthandPropertyAssignment */) {
+                            emitExpressionIdentifier(property.name);
+                        }
+                        else if (property.kind === 147 /* MethodDeclaration */) {
+                            emitFunctionDeclaration(property);
+                        }
+                        else {
+                            ts.Debug.fail("ObjectLiteralElement type not accounted for: " + property.kind);
+                        }
+                    }
+                    emitEnd(property);
+                }
+                writeComma();
+                emit(tempVar);
+                if (multiLine) {
+                    decreaseIndent();
+                    writeLine();
+                }
+                write(")");
+                function writeComma() {
+                    if (multiLine) {
+                        write(",");
+                        writeLine();
+                    }
+                    else {
+                        write(", ");
+                    }
+                }
+            }
+            function emitObjectLiteral(node) {
+                var properties = node.properties;
+                if (languageVersion < 2 /* ES6 */) {
+                    var numProperties = properties.length;
+                    // Find the first computed property.
+                    // Everything until that point can be emitted as part of the initial object literal.
+                    var numInitialNonComputedProperties = numProperties;
+                    for (var i = 0, n = properties.length; i < n; i++) {
+                        if (properties[i].name.kind === 140 /* ComputedPropertyName */) {
+                            numInitialNonComputedProperties = i;
+                            break;
+                        }
+                    }
+                    var hasComputedProperty = numInitialNonComputedProperties !== properties.length;
+                    if (hasComputedProperty) {
+                        emitDownlevelObjectLiteralWithComputedProperties(node, numInitialNonComputedProperties);
+                        return;
+                    }
+                }
+                // Ordinary case: either the object has no computed properties
+                // or we're compiling with an ES6+ target.
+                emitObjectLiteralBody(node, properties.length);
+            }
+            function createBinaryExpression(left, operator, right, startsOnNewLine) {
+                var result = ts.createSynthesizedNode(187 /* BinaryExpression */, startsOnNewLine);
+                result.operatorToken = ts.createSynthesizedNode(operator);
+                result.left = left;
+                result.right = right;
+                return result;
+            }
+            function createPropertyAccessExpression(expression, name) {
+                var result = ts.createSynthesizedNode(172 /* PropertyAccessExpression */);
+                result.expression = parenthesizeForAccess(expression);
+                result.dotToken = ts.createSynthesizedNode(21 /* DotToken */);
+                result.name = name;
+                return result;
+            }
+            function createElementAccessExpression(expression, argumentExpression) {
+                var result = ts.createSynthesizedNode(173 /* ElementAccessExpression */);
+                result.expression = parenthesizeForAccess(expression);
+                result.argumentExpression = argumentExpression;
+                return result;
+            }
+            function parenthesizeForAccess(expr) {
+                // When diagnosing whether the expression needs parentheses, the decision should be based
+                // on the innermost expression in a chain of nested type assertions.
+                while (expr.kind === 177 /* TypeAssertionExpression */ ||
+                    expr.kind === 195 /* AsExpression */ ||
+                    expr.kind === 196 /* NonNullExpression */) {
+                    expr = expr.expression;
+                }
+                // isLeftHandSideExpression is almost the correct criterion for when it is not necessary
+                // to parenthesize the expression before a dot. The known exceptions are:
+                //
+                //    NewExpression:
+                //       new C.x        -> not the same as (new C).x
+                //    NumberLiteral
+                //       1.x            -> not the same as (1).x
+                //
+                if (ts.isLeftHandSideExpression(expr) &&
+                    expr.kind !== 175 /* NewExpression */ &&
+                    expr.kind !== 8 /* NumericLiteral */) {
+                    return expr;
+                }
+                var node = ts.createSynthesizedNode(178 /* ParenthesizedExpression */);
+                node.expression = expr;
+                return node;
+            }
+            function emitComputedPropertyName(node) {
+                write("[");
+                emitExpressionForPropertyName(node);
+                write("]");
+            }
+            function emitMethod(node) {
+                if (languageVersion >= 2 /* ES6 */ && node.asteriskToken) {
+                    write("*");
+                }
+                emit(node.name);
+                if (languageVersion < 2 /* ES6 */) {
+                    write(": function ");
+                }
+                emitSignatureAndBody(node);
+            }
+            function emitPropertyAssignment(node) {
+                emit(node.name);
+                write(": ");
+                // This is to ensure that we emit comment in the following case:
+                //      For example:
+                //          obj = {
+                //              id: /*comment1*/ ()=>void
+                //          }
+                // "comment1" is not considered to be leading comment for node.initializer
+                // but rather a trailing comment on the previous node.
+                emitTrailingCommentsOfPosition(node.initializer.pos);
+                emit(node.initializer);
+            }
+            // Return true if identifier resolves to an exported member of a namespace
+            function isNamespaceExportReference(node) {
+                var container = resolver.getReferencedExportContainer(node);
+                return container && container.kind !== 256 /* SourceFile */;
+            }
+            // Return true if identifier resolves to an imported identifier
+            function isImportedReference(node) {
+                var declaration = resolver.getReferencedImportDeclaration(node);
+                return declaration && (declaration.kind === 231 /* ImportClause */ || declaration.kind === 234 /* ImportSpecifier */);
+            }
+            function emitShorthandPropertyAssignment(node) {
+                // The name property of a short-hand property assignment is considered an expression position, so here
+                // we manually emit the identifier to avoid rewriting.
+                writeTextOfNode(currentText, node.name);
+                // If emitting pre-ES6 code, or if the name requires rewriting when resolved as an expression identifier,
+                // we emit a normal property assignment. For example:
+                //   module m {
+                //       export let y;
+                //   }
+                //   module m {
+                //       let obj = { y };
+                //   }
+                // Here we need to emit obj = { y : m.y } regardless of the output target.
+                // The same rules apply for imported identifiers when targeting module formats with indirect access to
+                // the imported identifiers. For example, when targeting CommonJS:
+                //
+                //   import {foo} from './foo';
+                //   export const baz = { foo };
+                //
+                // Must be transformed into:
+                //
+                //   const foo_1 = require('./foo');
+                //   exports.baz = { foo: foo_1.foo };
+                //
+                if (languageVersion < 2 /* ES6 */ || (modulekind !== ts.ModuleKind.ES6 && isImportedReference(node.name)) || isNamespaceExportReference(node.name)) {
+                    // Emit identifier as an identifier
+                    write(": ");
+                    emit(node.name);
+                }
+                if (languageVersion >= 2 /* ES6 */ && node.objectAssignmentInitializer) {
+                    write(" = ");
+                    emit(node.objectAssignmentInitializer);
+                }
+            }
+            function tryEmitConstantValue(node) {
+                var constantValue = tryGetConstEnumValue(node);
+                if (constantValue !== undefined) {
+                    write(constantValue.toString());
+                    if (!compilerOptions.removeComments) {
+                        var propertyName = node.kind === 172 /* PropertyAccessExpression */ ? ts.declarationNameToString(node.name) : ts.getTextOfNode(node.argumentExpression);
+                        write(" /* " + propertyName + " */");
+                    }
+                    return true;
+                }
+                return false;
+            }
+            function tryGetConstEnumValue(node) {
+                if (compilerOptions.isolatedModules) {
+                    return undefined;
+                }
+                return node.kind === 172 /* PropertyAccessExpression */ || node.kind === 173 /* ElementAccessExpression */
+                    ? resolver.getConstantValue(node)
+                    : undefined;
+            }
+            // Returns 'true' if the code was actually indented, false otherwise.
+            // If the code is not indented, an optional valueToWriteWhenNotIndenting will be
+            // emitted instead.
+            function indentIfOnDifferentLines(parent, node1, node2, valueToWriteWhenNotIndenting) {
+                var realNodesAreOnDifferentLines = !ts.nodeIsSynthesized(parent) && !nodeEndIsOnSameLineAsNodeStart(node1, node2);
+                // Always use a newline for synthesized code if the synthesizer desires it.
+                var synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2);
+                if (realNodesAreOnDifferentLines || synthesizedNodeIsOnDifferentLine) {
+                    increaseIndent();
+                    writeLine();
+                    return true;
+                }
+                else {
+                    if (valueToWriteWhenNotIndenting) {
+                        write(valueToWriteWhenNotIndenting);
+                    }
+                    return false;
+                }
+            }
+            function emitPropertyAccess(node) {
+                if (tryEmitConstantValue(node)) {
+                    return;
+                }
+                if (languageVersion === 2 /* ES6 */ &&
+                    node.expression.kind === 95 /* SuperKeyword */ &&
+                    isInAsyncMethodWithSuperInES6(node)) {
+                    var name_28 = ts.createSynthesizedNode(9 /* StringLiteral */);
+                    name_28.text = node.name.text;
+                    emitSuperAccessInAsyncMethod(node.expression, name_28);
+                    return;
+                }
+                emit(node.expression);
+                var indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, node.dotToken);
+                // 1 .toString is a valid property access, emit a space after the literal
+                // Also emit a space if expression is a integer const enum value - it will appear in generated code as numeric literal
+                var shouldEmitSpace = false;
+                if (!indentedBeforeDot) {
+                    if (node.expression.kind === 8 /* NumericLiteral */) {
+                        // check if numeric literal was originally written with a dot
+                        var text = ts.getTextOfNodeFromSourceText(currentText, node.expression);
+                        shouldEmitSpace = text.indexOf(ts.tokenToString(21 /* DotToken */)) < 0;
+                    }
+                    else {
+                        // check if constant enum value is integer
+                        var constantValue = tryGetConstEnumValue(node.expression);
+                        // isFinite handles cases when constantValue is undefined
+                        shouldEmitSpace = isFinite(constantValue) && Math.floor(constantValue) === constantValue;
+                    }
+                }
+                if (shouldEmitSpace) {
+                    write(" .");
+                }
+                else {
+                    write(".");
+                }
+                var indentedAfterDot = indentIfOnDifferentLines(node, node.dotToken, node.name);
+                emit(node.name);
+                decreaseIndentIf(indentedBeforeDot, indentedAfterDot);
+            }
+            function emitQualifiedName(node) {
+                emit(node.left);
+                write(".");
+                emit(node.right);
+            }
+            function emitQualifiedNameAsExpression(node, useFallback) {
+                if (node.left.kind === 69 /* Identifier */) {
+                    emitEntityNameAsExpression(node.left, useFallback);
+                }
+                else if (useFallback) {
+                    var temp = createAndRecordTempVariable(0 /* Auto */);
+                    write("(");
+                    emitNodeWithoutSourceMap(temp);
+                    write(" = ");
+                    emitEntityNameAsExpression(node.left, /*useFallback*/ true);
+                    write(") && ");
+                    emitNodeWithoutSourceMap(temp);
+                }
+                else {
+                    emitEntityNameAsExpression(node.left, /*useFallback*/ false);
+                }
+                write(".");
+                emit(node.right);
+            }
+            function emitEntityNameAsExpression(node, useFallback) {
+                switch (node.kind) {
+                    case 69 /* Identifier */:
+                        if (useFallback) {
+                            write("typeof ");
+                            emitExpressionIdentifier(node);
+                            write(" !== 'undefined' && ");
+                        }
+                        emitExpressionIdentifier(node);
+                        break;
+                    case 139 /* QualifiedName */:
+                        emitQualifiedNameAsExpression(node, useFallback);
+                        break;
+                    default:
+                        emitNodeWithoutSourceMap(node);
+                        break;
+                }
+            }
+            function emitIndexedAccess(node) {
+                if (tryEmitConstantValue(node)) {
+                    return;
+                }
+                if (languageVersion === 2 /* ES6 */ &&
+                    node.expression.kind === 95 /* SuperKeyword */ &&
+                    isInAsyncMethodWithSuperInES6(node)) {
+                    emitSuperAccessInAsyncMethod(node.expression, node.argumentExpression);
+                    return;
+                }
+                emit(node.expression);
+                write("[");
+                emit(node.argumentExpression);
+                write("]");
+            }
+            function hasSpreadElement(elements) {
+                return ts.forEach(elements, function (e) { return e.kind === 191 /* SpreadElementExpression */; });
+            }
+            function skipParentheses(node) {
+                while (node.kind === 178 /* ParenthesizedExpression */ ||
+                    node.kind === 177 /* TypeAssertionExpression */ ||
+                    node.kind === 195 /* AsExpression */ ||
+                    node.kind === 196 /* NonNullExpression */) {
+                    node = node.expression;
+                }
+                return node;
+            }
+            function emitCallTarget(node) {
+                if (node.kind === 69 /* Identifier */ || node.kind === 97 /* ThisKeyword */ || node.kind === 95 /* SuperKeyword */) {
+                    emit(node);
+                    return node;
+                }
+                var temp = createAndRecordTempVariable(0 /* Auto */);
+                write("(");
+                emit(temp);
+                write(" = ");
+                emit(node);
+                write(")");
+                return temp;
+            }
+            function emitCallWithSpread(node) {
+                var target;
+                var expr = skipParentheses(node.expression);
+                if (expr.kind === 172 /* PropertyAccessExpression */) {
+                    // Target will be emitted as "this" argument
+                    target = emitCallTarget(expr.expression);
+                    write(".");
+                    emit(expr.name);
+                }
+                else if (expr.kind === 173 /* ElementAccessExpression */) {
+                    // Target will be emitted as "this" argument
+                    target = emitCallTarget(expr.expression);
+                    write("[");
+                    emit(expr.argumentExpression);
+                    write("]");
+                }
+                else if (expr.kind === 95 /* SuperKeyword */) {
+                    target = expr;
+                    write("_super");
+                }
+                else {
+                    emit(node.expression);
+                }
+                write(".apply(");
+                if (target) {
+                    if (target.kind === 95 /* SuperKeyword */) {
+                        // Calls of form super(...) and super.foo(...)
+                        emitThis(target);
+                    }
+                    else {
+                        // Calls of form obj.foo(...)
+                        emit(target);
+                    }
+                }
+                else {
+                    // Calls of form foo(...)
+                    write("void 0");
+                }
+                write(", ");
+                emitListWithSpread(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*trailingComma*/ false, /*useConcat*/ true);
+                write(")");
+            }
+            function isInAsyncMethodWithSuperInES6(node) {
+                if (languageVersion === 2 /* ES6 */) {
+                    var container = ts.getSuperContainer(node, /*includeFunctions*/ false);
+                    if (container && resolver.getNodeCheckFlags(container) & (2048 /* AsyncMethodWithSuper */ | 4096 /* AsyncMethodWithSuperBinding */)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function emitSuperAccessInAsyncMethod(superNode, argumentExpression) {
+                var container = ts.getSuperContainer(superNode, /*includeFunctions*/ false);
+                var isSuperBinding = resolver.getNodeCheckFlags(container) & 4096 /* AsyncMethodWithSuperBinding */;
+                write("_super(");
+                emit(argumentExpression);
+                write(isSuperBinding ? ").value" : ")");
+            }
+            function emitCallExpression(node) {
+                if (languageVersion < 2 /* ES6 */ && hasSpreadElement(node.arguments)) {
+                    emitCallWithSpread(node);
+                    return;
+                }
+                var expression = node.expression;
+                var superCall = false;
+                var isAsyncMethodWithSuper = false;
+                if (expression.kind === 95 /* SuperKeyword */) {
+                    emitSuper(expression);
+                    superCall = true;
+                }
+                else {
+                    superCall = ts.isSuperPropertyOrElementAccess(expression);
+                    isAsyncMethodWithSuper = superCall && isInAsyncMethodWithSuperInES6(node);
+                    emit(expression);
+                }
+                if (superCall && (languageVersion < 2 /* ES6 */ || isAsyncMethodWithSuper)) {
+                    write(".call(");
+                    emitThis(expression);
+                    if (node.arguments.length) {
+                        write(", ");
+                        emitCommaList(node.arguments);
+                    }
+                    write(")");
+                }
+                else {
+                    write("(");
+                    emitCommaList(node.arguments);
+                    write(")");
+                }
+            }
+            function emitNewExpression(node) {
+                write("new ");
+                // Spread operator logic is supported in new expressions in ES5 using a combination
+                // of Function.prototype.bind() and Function.prototype.apply().
+                //
+                //     Example:
+                //
+                //         var args = [1, 2, 3, 4, 5];
+                //         new Array(...args);
+                //
+                //     is compiled into the following ES5:
+                //
+                //         var args = [1, 2, 3, 4, 5];
+                //         new (Array.bind.apply(Array, [void 0].concat(args)));
+                //
+                // The 'thisArg' to 'bind' is ignored when invoking the result of 'bind' with 'new',
+                // Thus, we set it to undefined ('void 0').
+                if (languageVersion === 1 /* ES5 */ &&
+                    node.arguments &&
+                    hasSpreadElement(node.arguments)) {
+                    write("(");
+                    var target = emitCallTarget(node.expression);
+                    write(".bind.apply(");
+                    emit(target);
+                    write(", [void 0].concat(");
+                    emitListWithSpread(node.arguments, /*needsUniqueCopy*/ false, /*multiLine*/ false, /*trailingComma*/ false, /*useConcat*/ false);
+                    write(")))");
+                    write("()");
+                }
+                else {
+                    emit(node.expression);
+                    if (node.arguments) {
+                        write("(");
+                        emitCommaList(node.arguments);
+                        write(")");
+                    }
+                }
+            }
+            function emitTaggedTemplateExpression(node) {
+                if (languageVersion >= 2 /* ES6 */) {
+                    emit(node.tag);
+                    write(" ");
+                    emit(node.template);
+                }
+                else {
+                    emitDownlevelTaggedTemplate(node);
+                }
+            }
+            function emitParenExpression(node) {
+                // If the node is synthesized, it means the emitter put the parentheses there,
+                // not the user. If we didn't want them, the emitter would not have put them
+                // there.
+                if (!ts.nodeIsSynthesized(node) && node.parent.kind !== 180 /* ArrowFunction */) {
+                    if (node.expression.kind === 177 /* TypeAssertionExpression */ ||
+                        node.expression.kind === 195 /* AsExpression */ ||
+                        node.expression.kind === 196 /* NonNullExpression */) {
+                        var operand = node.expression.expression;
+                        // Make sure we consider all nested cast expressions, e.g.:
+                        // (<any><number><any>-A).x;
+                        while (operand.kind === 177 /* TypeAssertionExpression */ ||
+                            operand.kind === 195 /* AsExpression */ ||
+                            operand.kind === 196 /* NonNullExpression */) {
+                            operand = operand.expression;
+                        }
+                        // We have an expression of the form: (<Type>SubExpr)
+                        // Emitting this as (SubExpr) is really not desirable. We would like to emit the subexpr as is.
+                        // Omitting the parentheses, however, could cause change in the semantics of the generated
+                        // code if the casted expression has a lower precedence than the rest of the expression, e.g.:
+                        //      (<any>new A).foo should be emitted as (new A).foo and not new A.foo
+                        //      (<any>typeof A).toString() should be emitted as (typeof A).toString() and not typeof A.toString()
+                        //      new (<any>A()) should be emitted as new (A()) and not new A()
+                        //      (<any>function foo() { })() should be emitted as an IIF (function foo(){})() and not declaration function foo(){} ()
+                        if (operand.kind !== 185 /* PrefixUnaryExpression */ &&
+                            operand.kind !== 183 /* VoidExpression */ &&
+                            operand.kind !== 182 /* TypeOfExpression */ &&
+                            operand.kind !== 181 /* DeleteExpression */ &&
+                            operand.kind !== 186 /* PostfixUnaryExpression */ &&
+                            operand.kind !== 175 /* NewExpression */ &&
+                            !(operand.kind === 174 /* CallExpression */ && node.parent.kind === 175 /* NewExpression */) &&
+                            !(operand.kind === 179 /* FunctionExpression */ && node.parent.kind === 174 /* CallExpression */) &&
+                            !(operand.kind === 8 /* NumericLiteral */ && node.parent.kind === 172 /* PropertyAccessExpression */)) {
+                            emit(operand);
+                            return;
+                        }
+                    }
+                }
+                write("(");
+                emit(node.expression);
+                write(")");
+            }
+            function emitDeleteExpression(node) {
+                write(ts.tokenToString(78 /* DeleteKeyword */));
+                write(" ");
+                emit(node.expression);
+            }
+            function emitVoidExpression(node) {
+                write(ts.tokenToString(103 /* VoidKeyword */));
+                write(" ");
+                emit(node.expression);
+            }
+            function emitTypeOfExpression(node) {
+                write(ts.tokenToString(101 /* TypeOfKeyword */));
+                write(" ");
+                emit(node.expression);
+            }
+            function isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node) {
+                if (!isCurrentFileSystemExternalModule() || node.kind !== 69 /* Identifier */ || ts.nodeIsSynthesized(node)) {
+                    return false;
+                }
+                var isVariableDeclarationOrBindingElement = node.parent && (node.parent.kind === 218 /* VariableDeclaration */ || node.parent.kind === 169 /* BindingElement */);
+                var targetDeclaration = isVariableDeclarationOrBindingElement
+                    ? node.parent
+                    : resolver.getReferencedValueDeclaration(node);
+                return isSourceFileLevelDeclarationInSystemJsModule(targetDeclaration, /*isExported*/ true);
+            }
+            function isNameOfExportedDeclarationInNonES6Module(node) {
+                if (modulekind === ts.ModuleKind.System || node.kind !== 69 /* Identifier */ || ts.nodeIsSynthesized(node)) {
+                    return false;
+                }
+                return !exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, node.text);
+            }
+            function emitPrefixUnaryExpression(node) {
+                var isPlusPlusOrMinusMinus = (node.operator === 41 /* PlusPlusToken */
+                    || node.operator === 42 /* MinusMinusToken */);
+                var externalExportChanged = isPlusPlusOrMinusMinus &&
+                    isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
+                if (externalExportChanged) {
+                    // emit
+                    // ++x
+                    // as
+                    // exports('x', ++x)
+                    write(exportFunctionForFile + "(\"");
+                    emitNodeWithoutSourceMap(node.operand);
+                    write("\", ");
+                }
+                var internalExportChanged = isPlusPlusOrMinusMinus &&
+                    isNameOfExportedDeclarationInNonES6Module(node.operand);
+                if (internalExportChanged) {
+                    emitAliasEqual(node.operand);
+                }
+                write(ts.tokenToString(node.operator));
+                // In some cases, we need to emit a space between the operator and the operand. One obvious case
+                // is when the operator is an identifier, like delete or typeof. We also need to do this for plus
+                // and minus expressions in certain cases. Specifically, consider the following two cases (parens
+                // are just for clarity of exposition, and not part of the source code):
+                //
+                //  (+(+1))
+                //  (+(++1))
+                //
+                // We need to emit a space in both cases. In the first case, the absence of a space will make
+                // the resulting expression a prefix increment operation. And in the second, it will make the resulting
+                // expression a prefix increment whose operand is a plus expression - (++(+x))
+                // The same is true of minus of course.
+                if (node.operand.kind === 185 /* PrefixUnaryExpression */) {
+                    var operand = node.operand;
+                    if (node.operator === 35 /* PlusToken */ && (operand.operator === 35 /* PlusToken */ || operand.operator === 41 /* PlusPlusToken */)) {
+                        write(" ");
+                    }
+                    else if (node.operator === 36 /* MinusToken */ && (operand.operator === 36 /* MinusToken */ || operand.operator === 42 /* MinusMinusToken */)) {
+                        write(" ");
+                    }
+                }
+                emit(node.operand);
+                if (externalExportChanged) {
+                    write(")");
+                }
+            }
+            function emitPostfixUnaryExpression(node) {
+                var externalExportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.operand);
+                var internalExportChanged = isNameOfExportedDeclarationInNonES6Module(node.operand);
+                if (externalExportChanged) {
+                    // export function returns the value that was passes as the second argument
+                    // however for postfix unary expressions result value should be the value before modification.
+                    // emit 'x++' as '(export('x', ++x) - 1)' and 'x--' as '(export('x', --x) + 1)'
+                    write("(" + exportFunctionForFile + "(\"");
+                    emitNodeWithoutSourceMap(node.operand);
+                    write("\", ");
+                    write(ts.tokenToString(node.operator));
+                    emit(node.operand);
+                    if (node.operator === 41 /* PlusPlusToken */) {
+                        write(") - 1)");
+                    }
+                    else {
+                        write(") + 1)");
+                    }
+                }
+                else if (internalExportChanged) {
+                    emitAliasEqual(node.operand);
+                    emit(node.operand);
+                    if (node.operator === 41 /* PlusPlusToken */) {
+                        write(" += 1");
+                    }
+                    else {
+                        write(" -= 1");
+                    }
+                }
+                else {
+                    emit(node.operand);
+                    write(ts.tokenToString(node.operator));
+                }
+            }
+            function shouldHoistDeclarationInSystemJsModule(node) {
+                return isSourceFileLevelDeclarationInSystemJsModule(node, /*isExported*/ false);
+            }
+            /*
+             * Checks if given node is a source file level declaration (not nested in module/function).
+             * If 'isExported' is true - then declaration must also be exported.
+             * This function is used in two cases:
+             * - check if node is a exported source file level value to determine
+             *   if we should also export the value after its it changed
+             * - check if node is a source level declaration to emit it differently,
+             *   i.e non-exported variable statement 'var x = 1' is hoisted so
+             *   we we emit variable statement 'var' should be dropped.
+             */
+            function isSourceFileLevelDeclarationInSystemJsModule(node, isExported) {
+                if (!node || !isCurrentFileSystemExternalModule()) {
+                    return false;
+                }
+                var current = ts.getRootDeclaration(node).parent;
+                while (current) {
+                    if (current.kind === 256 /* SourceFile */) {
+                        return !isExported || ((ts.getCombinedNodeFlags(node) & 1 /* Export */) !== 0);
+                    }
+                    else if (ts.isDeclaration(current)) {
+                        return false;
+                    }
+                    else {
+                        current = current.parent;
+                    }
+                }
+            }
+            /**
+             * Emit ES7 exponentiation operator downlevel using Math.pow
+             * @param node a binary expression node containing exponentiationOperator (**, **=)
+             */
+            function emitExponentiationOperator(node) {
+                var leftHandSideExpression = node.left;
+                if (node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) {
+                    var synthesizedLHS = void 0;
+                    var shouldEmitParentheses = false;
+                    if (ts.isElementAccessExpression(leftHandSideExpression)) {
+                        shouldEmitParentheses = true;
+                        write("(");
+                        synthesizedLHS = ts.createSynthesizedNode(173 /* ElementAccessExpression */, /*startsOnNewLine*/ false);
+                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, /*canDefineTempVariablesInPlace*/ false, /*shouldEmitCommaBeforeAssignment*/ false);
+                        synthesizedLHS.expression = identifier;
+                        if (leftHandSideExpression.argumentExpression.kind !== 8 /* NumericLiteral */ &&
+                            leftHandSideExpression.argumentExpression.kind !== 9 /* StringLiteral */) {
+                            var tempArgumentExpression = createAndRecordTempVariable(268435456 /* _i */);
+                            synthesizedLHS.argumentExpression = tempArgumentExpression;
+                            emitAssignment(tempArgumentExpression, leftHandSideExpression.argumentExpression, /*shouldEmitCommaBeforeAssignment*/ true, leftHandSideExpression.expression);
+                        }
+                        else {
+                            synthesizedLHS.argumentExpression = leftHandSideExpression.argumentExpression;
+                        }
+                        write(", ");
+                    }
+                    else if (ts.isPropertyAccessExpression(leftHandSideExpression)) {
+                        shouldEmitParentheses = true;
+                        write("(");
+                        synthesizedLHS = ts.createSynthesizedNode(172 /* PropertyAccessExpression */, /*startsOnNewLine*/ false);
+                        var identifier = emitTempVariableAssignment(leftHandSideExpression.expression, /*canDefineTempVariablesInPlace*/ false, /*shouldEmitCommaBeforeAssignment*/ false);
+                        synthesizedLHS.expression = identifier;
+                        synthesizedLHS.dotToken = leftHandSideExpression.dotToken;
+                        synthesizedLHS.name = leftHandSideExpression.name;
+                        write(", ");
+                    }
+                    emit(synthesizedLHS || leftHandSideExpression);
+                    write(" = ");
+                    write("Math.pow(");
+                    emit(synthesizedLHS || leftHandSideExpression);
+                    write(", ");
+                    emit(node.right);
+                    write(")");
+                    if (shouldEmitParentheses) {
+                        write(")");
+                    }
+                }
+                else {
+                    write("Math.pow(");
+                    emit(leftHandSideExpression);
+                    write(", ");
+                    emit(node.right);
+                    write(")");
+                }
+            }
+            function emitAliasEqual(name) {
+                for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
+                    var specifier = _b[_a];
+                    emitStart(specifier.name);
+                    emitContainingModuleName(specifier);
+                    if (languageVersion === 0 /* ES3 */ && name.text === "default") {
+                        write('["default"]');
+                    }
+                    else {
+                        write(".");
+                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                    }
+                    emitEnd(specifier.name);
+                    write(" = ");
+                }
+                return true;
+            }
+            function emitBinaryExpression(node) {
+                if (languageVersion < 2 /* ES6 */ && node.operatorToken.kind === 56 /* EqualsToken */ &&
+                    (node.left.kind === 171 /* ObjectLiteralExpression */ || node.left.kind === 170 /* ArrayLiteralExpression */)) {
+                    emitDestructuring(node, node.parent.kind === 202 /* ExpressionStatement */);
+                }
+                else {
+                    var isAssignment = ts.isAssignmentOperator(node.operatorToken.kind);
+                    var externalExportChanged = isAssignment &&
+                        isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.left);
+                    if (externalExportChanged) {
+                        // emit assignment 'x <op> y' as 'exports("x", x <op> y)'
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithoutSourceMap(node.left);
+                        write("\", ");
+                    }
+                    var internalExportChanged = isAssignment &&
+                        isNameOfExportedDeclarationInNonES6Module(node.left);
+                    if (internalExportChanged) {
+                        // export { foo }
+                        // emit foo = 2 as exports.foo = foo = 2
+                        emitAliasEqual(node.left);
+                    }
+                    if (node.operatorToken.kind === 38 /* AsteriskAsteriskToken */ || node.operatorToken.kind === 60 /* AsteriskAsteriskEqualsToken */) {
+                        // Downleveled emit exponentiation operator using Math.pow
+                        emitExponentiationOperator(node);
+                    }
+                    else {
+                        emit(node.left);
+                        // Add indentation before emit the operator if the operator is on different line
+                        // For example:
+                        //      3
+                        //      + 2;
+                        //   emitted as
+                        //      3
+                        //          + 2;
+                        var indentedBeforeOperator = indentIfOnDifferentLines(node, node.left, node.operatorToken, node.operatorToken.kind !== 24 /* CommaToken */ ? " " : undefined);
+                        write(ts.tokenToString(node.operatorToken.kind));
+                        var indentedAfterOperator = indentIfOnDifferentLines(node, node.operatorToken, node.right, " ");
+                        emit(node.right);
+                        decreaseIndentIf(indentedBeforeOperator, indentedAfterOperator);
+                    }
+                    if (externalExportChanged) {
+                        write(")");
+                    }
+                }
+            }
+            function synthesizedNodeStartsOnNewLine(node) {
+                return ts.nodeIsSynthesized(node) && node.startsOnNewLine;
+            }
+            function emitConditionalExpression(node) {
+                emit(node.condition);
+                var indentedBeforeQuestion = indentIfOnDifferentLines(node, node.condition, node.questionToken, " ");
+                write("?");
+                var indentedAfterQuestion = indentIfOnDifferentLines(node, node.questionToken, node.whenTrue, " ");
+                emit(node.whenTrue);
+                decreaseIndentIf(indentedBeforeQuestion, indentedAfterQuestion);
+                var indentedBeforeColon = indentIfOnDifferentLines(node, node.whenTrue, node.colonToken, " ");
+                write(":");
+                var indentedAfterColon = indentIfOnDifferentLines(node, node.colonToken, node.whenFalse, " ");
+                emit(node.whenFalse);
+                decreaseIndentIf(indentedBeforeColon, indentedAfterColon);
+            }
+            // Helper function to decrease the indent if we previously indented.  Allows multiple
+            // previous indent values to be considered at a time.  This also allows caller to just
+            // call this once, passing in all their appropriate indent values, instead of needing
+            // to call this helper function multiple times.
+            function decreaseIndentIf(value1, value2) {
+                if (value1) {
+                    decreaseIndent();
+                }
+                if (value2) {
+                    decreaseIndent();
+                }
+            }
+            function isSingleLineEmptyBlock(node) {
+                if (node && node.kind === 199 /* Block */) {
+                    var block = node;
+                    return block.statements.length === 0 && nodeEndIsOnSameLineAsNodeStart(block, block);
+                }
+            }
+            function emitBlock(node) {
+                if (isSingleLineEmptyBlock(node)) {
+                    emitToken(15 /* OpenBraceToken */, node.pos);
+                    write(" ");
+                    emitToken(16 /* CloseBraceToken */, node.statements.end);
+                    return;
+                }
+                emitToken(15 /* OpenBraceToken */, node.pos);
+                increaseIndent();
+                if (node.kind === 226 /* ModuleBlock */) {
+                    ts.Debug.assert(node.parent.kind === 225 /* ModuleDeclaration */);
+                    emitCaptureThisForNodeIfNecessary(node.parent);
+                }
+                emitLines(node.statements);
+                if (node.kind === 226 /* ModuleBlock */) {
+                    emitTempDeclarations(/*newLine*/ true);
+                }
+                decreaseIndent();
+                writeLine();
+                emitToken(16 /* CloseBraceToken */, node.statements.end);
+            }
+            function emitEmbeddedStatement(node) {
+                if (node.kind === 199 /* Block */) {
+                    write(" ");
+                    emit(node);
+                }
+                else {
+                    increaseIndent();
+                    writeLine();
+                    emit(node);
+                    decreaseIndent();
+                }
+            }
+            function emitExpressionStatement(node) {
+                emitParenthesizedIf(node.expression, /*parenthesized*/ node.expression.kind === 180 /* ArrowFunction */);
+                write(";");
+            }
+            function emitIfStatement(node) {
+                var endPos = emitToken(88 /* IfKeyword */, node.pos);
+                write(" ");
+                endPos = emitToken(17 /* OpenParenToken */, endPos);
+                emit(node.expression);
+                emitToken(18 /* CloseParenToken */, node.expression.end);
+                emitEmbeddedStatement(node.thenStatement);
+                if (node.elseStatement) {
+                    writeLine();
+                    emitToken(80 /* ElseKeyword */, node.thenStatement.end);
+                    if (node.elseStatement.kind === 203 /* IfStatement */) {
+                        write(" ");
+                        emit(node.elseStatement);
+                    }
+                    else {
+                        emitEmbeddedStatement(node.elseStatement);
+                    }
+                }
+            }
+            function emitDoStatement(node) {
+                emitLoop(node, emitDoStatementWorker);
+            }
+            function emitDoStatementWorker(node, loop) {
+                write("do");
+                if (loop) {
+                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
+                }
+                else {
+                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
+                }
+                if (node.statement.kind === 199 /* Block */) {
+                    write(" ");
+                }
+                else {
+                    writeLine();
+                }
+                write("while (");
+                emit(node.expression);
+                write(");");
+            }
+            function emitWhileStatement(node) {
+                emitLoop(node, emitWhileStatementWorker);
+            }
+            function emitWhileStatementWorker(node, loop) {
+                write("while (");
+                emit(node.expression);
+                write(")");
+                if (loop) {
+                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
+                }
+                else {
+                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
+                }
+            }
+            /**
+             * Returns true if start of variable declaration list was emitted.
+             * Returns false if nothing was written - this can happen for source file level variable declarations
+             *     in system modules where such variable declarations are hoisted.
+             */
+            function tryEmitStartOfVariableDeclarationList(decl) {
+                if (shouldHoistVariable(decl, /*checkIfSourceFileLevelDecl*/ true)) {
+                    // variables in variable declaration list were already hoisted
+                    return false;
+                }
+                if (convertedLoopState && (ts.getCombinedNodeFlags(decl) & 3072 /* BlockScoped */) === 0) {
+                    // we are inside a converted loop - this can only happen in downlevel scenarios
+                    // record names for all variable declarations
+                    for (var _a = 0, _b = decl.declarations; _a < _b.length; _a++) {
+                        var varDecl = _b[_a];
+                        hoistVariableDeclarationFromLoop(convertedLoopState, varDecl);
+                    }
+                    return false;
+                }
+                emitStart(decl);
+                if (decl && languageVersion >= 2 /* ES6 */) {
+                    if (ts.isLet(decl)) {
+                        write("let ");
+                    }
+                    else if (ts.isConst(decl)) {
+                        write("const ");
+                    }
+                    else {
+                        write("var ");
+                    }
+                }
+                else {
+                    write("var ");
+                }
+                // Note here we specifically dont emit end so that if we are going to emit binding pattern
+                // we can alter the source map correctly
+                return true;
+            }
+            function emitVariableDeclarationListSkippingUninitializedEntries(list) {
+                var started = false;
+                for (var _a = 0, _b = list.declarations; _a < _b.length; _a++) {
+                    var decl = _b[_a];
+                    if (!decl.initializer) {
+                        continue;
+                    }
+                    if (!started) {
+                        started = true;
+                    }
+                    else {
+                        write(", ");
+                    }
+                    emit(decl);
+                }
+                return started;
+            }
+            function shouldConvertLoopBody(node) {
+                return languageVersion < 2 /* ES6 */ &&
+                    (resolver.getNodeCheckFlags(node) & 65536 /* LoopWithCapturedBlockScopedBinding */) !== 0;
+            }
+            function emitLoop(node, loopEmitter) {
+                var shouldConvert = shouldConvertLoopBody(node);
+                if (!shouldConvert) {
+                    loopEmitter(node, /* convertedLoop*/ undefined);
+                }
+                else {
+                    var loop = convertLoopBody(node);
+                    if (node.parent.kind === 214 /* LabeledStatement */) {
+                        // if parent of the loop was labeled statement - attach the label to loop skipping converted loop body
+                        emitLabelAndColon(node.parent);
+                    }
+                    loopEmitter(node, loop);
+                }
+            }
+            function convertLoopBody(node) {
+                var functionName = makeUniqueName("_loop");
+                var loopInitializer;
+                switch (node.kind) {
+                    case 206 /* ForStatement */:
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                        var initializer = node.initializer;
+                        if (initializer && initializer.kind === 219 /* VariableDeclarationList */) {
+                            loopInitializer = node.initializer;
+                        }
+                        break;
+                }
+                var loopParameters;
+                var loopOutParameters;
+                if (loopInitializer && (ts.getCombinedNodeFlags(loopInitializer) & 3072 /* BlockScoped */)) {
+                    // if loop initializer contains block scoped variables - they should be passed to converted loop body as parameters
+                    loopParameters = [];
+                    for (var _a = 0, _b = loopInitializer.declarations; _a < _b.length; _a++) {
+                        var varDeclaration = _b[_a];
+                        processVariableDeclaration(varDeclaration.name);
+                    }
+                }
+                var bodyIsBlock = node.statement.kind === 199 /* Block */;
+                var paramList = loopParameters ? loopParameters.join(", ") : "";
+                writeLine();
+                write("var " + functionName + " = function(" + paramList + ")");
+                var convertedOuterLoopState = convertedLoopState;
+                convertedLoopState = { loopOutParameters: loopOutParameters };
+                if (convertedOuterLoopState) {
+                    // convertedOuterLoopState !== undefined means that this converted loop is nested in another converted loop.
+                    // if outer converted loop has already accumulated some state - pass it through
+                    if (convertedOuterLoopState.argumentsName) {
+                        // outer loop has already used 'arguments' so we've already have some name to alias it
+                        // use the same name in all nested loops
+                        convertedLoopState.argumentsName = convertedOuterLoopState.argumentsName;
+                    }
+                    if (convertedOuterLoopState.thisName) {
+                        // outer loop has already used 'this' so we've already have some name to alias it
+                        // use the same name in all nested loops
+                        convertedLoopState.thisName = convertedOuterLoopState.thisName;
+                    }
+                    if (convertedOuterLoopState.hoistedLocalVariables) {
+                        // we've already collected some non-block scoped variable declarations in enclosing loop
+                        // use the same storage in nested loop
+                        convertedLoopState.hoistedLocalVariables = convertedOuterLoopState.hoistedLocalVariables;
+                    }
+                }
+                write(" {");
+                writeLine();
+                increaseIndent();
+                if (bodyIsBlock) {
+                    emitLines(node.statement.statements);
+                }
+                else {
+                    emit(node.statement);
+                }
+                writeLine();
+                // end of loop body -> copy out parameter
+                copyLoopOutParameters(convertedLoopState, 1 /* ToOutParameter */, /*emitAsStatements*/ true);
+                decreaseIndent();
+                writeLine();
+                write("};");
+                writeLine();
+                if (loopOutParameters) {
+                    // declare variables to hold out params for loop body
+                    write("var ");
+                    for (var i = 0; i < loopOutParameters.length; i++) {
+                        if (i !== 0) {
+                            write(", ");
+                        }
+                        write(loopOutParameters[i].outParamName);
+                    }
+                    write(";");
+                    writeLine();
+                }
+                if (convertedLoopState.argumentsName) {
+                    // if alias for arguments is set
+                    if (convertedOuterLoopState) {
+                        // pass it to outer converted loop
+                        convertedOuterLoopState.argumentsName = convertedLoopState.argumentsName;
+                    }
+                    else {
+                        // this is top level converted loop and we need to create an alias for 'arguments' object
+                        write("var " + convertedLoopState.argumentsName + " = arguments;");
+                        writeLine();
+                    }
+                }
+                if (convertedLoopState.thisName) {
+                    // if alias for this is set
+                    if (convertedOuterLoopState) {
+                        // pass it to outer converted loop
+                        convertedOuterLoopState.thisName = convertedLoopState.thisName;
+                    }
+                    else {
+                        // this is top level converted loop so we need to create an alias for 'this' here
+                        // NOTE:
+                        // if converted loops were all nested in arrow function then we'll always emit '_this' so convertedLoopState.thisName will not be set.
+                        // If it is set this means that all nested loops are not nested in arrow function and it is safe to capture 'this'.
+                        write("var " + convertedLoopState.thisName + " = this;");
+                        writeLine();
+                    }
+                }
+                if (convertedLoopState.hoistedLocalVariables) {
+                    // if hoistedLocalVariables !== undefined this means that we've possibly collected some variable declarations to be hoisted later
+                    if (convertedOuterLoopState) {
+                        // pass them to outer converted loop
+                        convertedOuterLoopState.hoistedLocalVariables = convertedLoopState.hoistedLocalVariables;
+                    }
+                    else {
+                        // deduplicate and hoist collected variable declarations
+                        write("var ");
+                        var seen = void 0;
+                        for (var _c = 0, _d = convertedLoopState.hoistedLocalVariables; _c < _d.length; _c++) {
+                            var id = _d[_c];
+                            // Don't initialize seen unless we have at least one element.
+                            // Emit a comma to separate for all but the first element.
+                            if (!seen) {
+                                seen = {};
+                            }
+                            else {
+                                write(", ");
+                            }
+                            if (!ts.hasProperty(seen, id.text)) {
+                                emit(id);
+                                seen[id.text] = id.text;
+                            }
+                        }
+                        write(";");
+                        writeLine();
+                    }
+                }
+                var currentLoopState = convertedLoopState;
+                convertedLoopState = convertedOuterLoopState;
+                return { functionName: functionName, paramList: paramList, state: currentLoopState };
+                function processVariableDeclaration(name) {
+                    if (name.kind === 69 /* Identifier */) {
+                        var nameText = isNameOfNestedBlockScopedRedeclarationOrCapturedBinding(name)
+                            ? getGeneratedNameForNode(name)
+                            : name.text;
+                        loopParameters.push(nameText);
+                        if (resolver.getNodeCheckFlags(name.parent) & 2097152 /* NeedsLoopOutParameter */) {
+                            var reassignedVariable = { originalName: name, outParamName: makeUniqueName("out_" + nameText) };
+                            (loopOutParameters || (loopOutParameters = [])).push(reassignedVariable);
+                        }
+                    }
+                    else {
+                        for (var _a = 0, _b = name.elements; _a < _b.length; _a++) {
+                            var element = _b[_a];
+                            processVariableDeclaration(element.name);
+                        }
+                    }
+                }
+            }
+            function emitNormalLoopBody(node, emitAsEmbeddedStatement) {
+                var saveAllowedNonLabeledJumps;
+                if (convertedLoopState) {
+                    // we get here if we are trying to emit normal loop loop inside converted loop
+                    // set allowedNonLabeledJumps to Break | Continue to mark that break\continue inside the loop should be emitted as is
+                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                    convertedLoopState.allowedNonLabeledJumps = 2 /* Break */ | 4 /* Continue */;
+                }
+                if (emitAsEmbeddedStatement) {
+                    emitEmbeddedStatement(node.statement);
+                }
+                else if (node.statement.kind === 199 /* Block */) {
+                    emitLines(node.statement.statements);
+                }
+                else {
+                    writeLine();
+                    emit(node.statement);
+                }
+                if (convertedLoopState) {
+                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
+                }
+            }
+            function copyLoopOutParameters(state, copyDirection, emitAsStatements) {
+                if (state.loopOutParameters) {
+                    for (var _a = 0, _b = state.loopOutParameters; _a < _b.length; _a++) {
+                        var outParam = _b[_a];
+                        if (copyDirection === 0 /* ToOriginal */) {
+                            emitIdentifier(outParam.originalName);
+                            write(" = " + outParam.outParamName);
+                        }
+                        else {
+                            write(outParam.outParamName + " = ");
+                            emitIdentifier(outParam.originalName);
+                        }
+                        if (emitAsStatements) {
+                            write(";");
+                            writeLine();
+                        }
+                        else {
+                            write(", ");
+                        }
+                    }
+                }
+            }
+            function emitConvertedLoopCall(loop, emitAsBlock) {
+                if (emitAsBlock) {
+                    write(" {");
+                    writeLine();
+                    increaseIndent();
+                }
+                // loop is considered simple if it does not have any return statements or break\continue that transfer control outside of the loop
+                // simple loops are emitted as just 'loop()';
+                // NOTE: if loop uses only 'continue' it still will be emitted as simple loop
+                var isSimpleLoop = !(loop.state.nonLocalJumps & ~4 /* Continue */) &&
+                    !loop.state.labeledNonLocalBreaks &&
+                    !loop.state.labeledNonLocalContinues;
+                var loopResult = makeUniqueName("state");
+                if (!isSimpleLoop) {
+                    write("var " + loopResult + " = ");
+                }
+                write(loop.functionName + "(" + loop.paramList + ");");
+                writeLine();
+                copyLoopOutParameters(loop.state, 0 /* ToOriginal */, /*emitAsStatements*/ true);
+                if (!isSimpleLoop) {
+                    // for non simple loops we need to store result returned from converted loop function and use it to do dispatching
+                    // converted loop function can return:
+                    // - object - used when body of the converted loop contains return statement. Property "value" of this object stores retuned value
+                    // - string - used to dispatch jumps. "break" and "continue" are used to non-labeled jumps, other values are used to transfer control to
+                    //   different labels
+                    writeLine();
+                    if (loop.state.nonLocalJumps & 8 /* Return */) {
+                        write("if (typeof " + loopResult + " === \"object\") ");
+                        if (convertedLoopState) {
+                            // we are currently nested in another converted loop - return unwrapped result
+                            write("return " + loopResult + ";");
+                            // propagate 'hasReturn' flag to outer loop
+                            convertedLoopState.nonLocalJumps |= 8 /* Return */;
+                        }
+                        else {
+                            // top level converted loop - return unwrapped value
+                            write("return " + loopResult + ".value;");
+                        }
+                        writeLine();
+                    }
+                    if (loop.state.nonLocalJumps & 2 /* Break */) {
+                        write("if (" + loopResult + " === \"break\") break;");
+                        writeLine();
+                    }
+                    // in case of labeled breaks emit code that either breaks to some known label inside outer loop or delegates jump decision to outer loop
+                    emitDispatchTableForLabeledJumps(loopResult, loop.state, convertedLoopState);
+                }
+                if (emitAsBlock) {
+                    writeLine();
+                    decreaseIndent();
+                    write("}");
+                }
+                function emitDispatchTableForLabeledJumps(loopResultVariable, currentLoop, outerLoop) {
+                    if (!currentLoop.labeledNonLocalBreaks && !currentLoop.labeledNonLocalContinues) {
+                        return;
+                    }
+                    write("switch(" + loopResultVariable + ") {");
+                    increaseIndent();
+                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalBreaks, /*isBreak*/ true, loopResultVariable, outerLoop);
+                    emitDispatchEntriesForLabeledJumps(currentLoop.labeledNonLocalContinues, /*isBreak*/ false, loopResultVariable, outerLoop);
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+                function emitDispatchEntriesForLabeledJumps(table, isBreak, loopResultVariable, outerLoop) {
+                    if (!table) {
+                        return;
+                    }
+                    for (var labelText in table) {
+                        var labelMarker = table[labelText];
+                        writeLine();
+                        write("case \"" + labelMarker + "\": ");
+                        // if there are no outer converted loop or outer label in question is located inside outer converted loop
+                        // then emit labeled break\continue
+                        // otherwise propagate pair 'label -> marker' to outer converted loop and emit 'return labelMarker' so outer loop can later decide what to do
+                        if (!outerLoop || (outerLoop.labels && outerLoop.labels[labelText])) {
+                            if (isBreak) {
+                                write("break ");
+                            }
+                            else {
+                                write("continue ");
+                            }
+                            write(labelText + ";");
+                        }
+                        else {
+                            setLabeledJump(outerLoop, isBreak, labelText, labelMarker);
+                            write("return " + loopResultVariable + ";");
+                        }
+                    }
+                }
+            }
+            function emitForStatement(node) {
+                emitLoop(node, emitForStatementWorker);
+            }
+            function emitForStatementWorker(node, loop) {
+                var endPos = emitToken(86 /* ForKeyword */, node.pos);
+                write(" ");
+                endPos = emitToken(17 /* OpenParenToken */, endPos);
+                if (node.initializer && node.initializer.kind === 219 /* VariableDeclarationList */) {
+                    var variableDeclarationList = node.initializer;
+                    var startIsEmitted = tryEmitStartOfVariableDeclarationList(variableDeclarationList);
+                    if (startIsEmitted) {
+                        emitCommaList(variableDeclarationList.declarations);
+                    }
+                    else {
+                        emitVariableDeclarationListSkippingUninitializedEntries(variableDeclarationList);
+                    }
+                }
+                else if (node.initializer) {
+                    emit(node.initializer);
+                }
+                write(";");
+                emitOptional(" ", node.condition);
+                write(";");
+                emitOptional(" ", node.incrementor);
+                write(")");
+                if (loop) {
+                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
+                }
+                else {
+                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
+                }
+            }
+            function emitForInOrForOfStatement(node) {
+                if (languageVersion < 2 /* ES6 */ && node.kind === 208 /* ForOfStatement */) {
+                    emitLoop(node, emitDownLevelForOfStatementWorker);
+                }
+                else {
+                    emitLoop(node, emitForInOrForOfStatementWorker);
+                }
+            }
+            function emitForInOrForOfStatementWorker(node, loop) {
+                var endPos = emitToken(86 /* ForKeyword */, node.pos);
+                write(" ");
+                endPos = emitToken(17 /* OpenParenToken */, endPos);
+                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
+                    var variableDeclarationList = node.initializer;
+                    if (variableDeclarationList.declarations.length >= 1) {
+                        tryEmitStartOfVariableDeclarationList(variableDeclarationList);
+                        emit(variableDeclarationList.declarations[0]);
+                    }
+                }
+                else {
+                    emit(node.initializer);
+                }
+                if (node.kind === 207 /* ForInStatement */) {
+                    write(" in ");
+                }
+                else {
+                    write(" of ");
+                }
+                emit(node.expression);
+                emitToken(18 /* CloseParenToken */, node.expression.end);
+                if (loop) {
+                    emitConvertedLoopCall(loop, /*emitAsBlock*/ true);
+                }
+                else {
+                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ true);
+                }
+            }
+            function emitDownLevelForOfStatementWorker(node, loop) {
+                // The following ES6 code:
+                //
+                //    for (let v of expr) { }
+                //
+                // should be emitted as
+                //
+                //    for (let _i = 0, _a = expr; _i < _a.length; _i++) {
+                //        let v = _a[_i];
+                //    }
+                //
+                // where _a and _i are temps emitted to capture the RHS and the counter,
+                // respectively.
+                // When the left hand side is an expression instead of a let declaration,
+                // the "let v" is not emitted.
+                // When the left hand side is a let/const, the v is renamed if there is
+                // another v in scope.
+                // Note that all assignments to the LHS are emitted in the body, including
+                // all destructuring.
+                // Note also that because an extra statement is needed to assign to the LHS,
+                // for-of bodies are always emitted as blocks.
+                var endPos = emitToken(86 /* ForKeyword */, node.pos);
+                write(" ");
+                endPos = emitToken(17 /* OpenParenToken */, endPos);
+                // Do not emit the LHS let declaration yet, because it might contain destructuring.
+                // Do not call recordTempDeclaration because we are declaring the temps
+                // right here. Recording means they will be declared later.
+                // In the case where the user wrote an identifier as the RHS, like this:
+                //
+                //     for (let v of arr) { }
+                //
+                // we can't reuse 'arr' because it might be modified within the body of the loop.
+                var counter = createTempVariable(268435456 /* _i */);
+                var rhsReference = ts.createSynthesizedNode(69 /* Identifier */);
+                rhsReference.text = node.expression.kind === 69 /* Identifier */ ?
+                    makeUniqueName(node.expression.text) :
+                    makeTempVariableName(0 /* Auto */);
+                // This is the let keyword for the counter and rhsReference. The let keyword for
+                // the LHS will be emitted inside the body.
+                emitStart(node.expression);
+                write("var ");
+                // _i = 0
+                emitNodeWithoutSourceMap(counter);
+                write(" = 0");
+                emitEnd(node.expression);
+                // , _a = expr
+                write(", ");
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(rhsReference);
+                write(" = ");
+                emitNodeWithoutSourceMap(node.expression);
+                emitEnd(node.expression);
+                write("; ");
+                // _i < _a.length;
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(counter);
+                write(" < ");
+                emitNodeWithCommentsAndWithoutSourcemap(rhsReference);
+                write(".length");
+                emitEnd(node.expression);
+                write("; ");
+                // _i++)
+                emitStart(node.expression);
+                emitNodeWithoutSourceMap(counter);
+                write("++");
+                emitEnd(node.expression);
+                emitToken(18 /* CloseParenToken */, node.expression.end);
+                // Body
+                write(" {");
+                writeLine();
+                increaseIndent();
+                // Initialize LHS
+                // let v = _a[_i];
+                var rhsIterationValue = createElementAccessExpression(rhsReference, counter);
+                emitStart(node.initializer);
+                if (node.initializer.kind === 219 /* VariableDeclarationList */) {
+                    write("var ");
+                    var variableDeclarationList = node.initializer;
+                    if (variableDeclarationList.declarations.length > 0) {
+                        var declaration = variableDeclarationList.declarations[0];
+                        if (ts.isBindingPattern(declaration.name)) {
+                            // This works whether the declaration is a var, let, or const.
+                            // It will use rhsIterationValue _a[_i] as the initializer.
+                            emitDestructuring(declaration, /*isAssignmentExpressionStatement*/ false, rhsIterationValue);
+                        }
+                        else {
+                            // The following call does not include the initializer, so we have
+                            // to emit it separately.
+                            emitNodeWithCommentsAndWithoutSourcemap(declaration);
+                            write(" = ");
+                            emitNodeWithoutSourceMap(rhsIterationValue);
+                        }
+                    }
+                    else {
+                        // It's an empty declaration list. This can only happen in an error case, if the user wrote
+                        //     for (let of []) {}
+                        emitNodeWithoutSourceMap(createTempVariable(0 /* Auto */));
+                        write(" = ");
+                        emitNodeWithoutSourceMap(rhsIterationValue);
+                    }
+                }
+                else {
+                    // Initializer is an expression. Emit the expression in the body, so that it's
+                    // evaluated on every iteration.
+                    var assignmentExpression = createBinaryExpression(node.initializer, 56 /* EqualsToken */, rhsIterationValue, /*startsOnNewLine*/ false);
+                    if (node.initializer.kind === 170 /* ArrayLiteralExpression */ || node.initializer.kind === 171 /* ObjectLiteralExpression */) {
+                        // This is a destructuring pattern, so call emitDestructuring instead of emit. Calling emit will not work, because it will cause
+                        // the BinaryExpression to be passed in instead of the expression statement, which will cause emitDestructuring to crash.
+                        emitDestructuring(assignmentExpression, /*isAssignmentExpressionStatement*/ true, /*value*/ undefined);
+                    }
+                    else {
+                        emitNodeWithCommentsAndWithoutSourcemap(assignmentExpression);
+                    }
+                }
+                emitEnd(node.initializer);
+                write(";");
+                if (loop) {
+                    writeLine();
+                    emitConvertedLoopCall(loop, /*emitAsBlock*/ false);
+                }
+                else {
+                    emitNormalLoopBody(node, /*emitAsEmbeddedStatement*/ false);
+                }
+                writeLine();
+                decreaseIndent();
+                write("}");
+            }
+            function emitBreakOrContinueStatement(node) {
+                if (convertedLoopState) {
+                    // check if we can emit break\continue as is
+                    // it is possible if either
+                    //   - break\continue is statement labeled and label is located inside the converted loop
+                    //   - break\continue is non-labeled and located in non-converted loop\switch statement
+                    var jump = node.kind === 210 /* BreakStatement */ ? 2 /* Break */ : 4 /* Continue */;
+                    var canUseBreakOrContinue = (node.label && convertedLoopState.labels && convertedLoopState.labels[node.label.text]) ||
+                        (!node.label && (convertedLoopState.allowedNonLabeledJumps & jump));
+                    if (!canUseBreakOrContinue) {
+                        write("return ");
+                        // explicit exit from loop -> copy out parameters
+                        copyLoopOutParameters(convertedLoopState, 1 /* ToOutParameter */, /*emitAsStatements*/ false);
+                        if (!node.label) {
+                            if (node.kind === 210 /* BreakStatement */) {
+                                convertedLoopState.nonLocalJumps |= 2 /* Break */;
+                                write("\"break\";");
+                            }
+                            else {
+                                convertedLoopState.nonLocalJumps |= 4 /* Continue */;
+                                // note: return value is emitted only to simplify debugging, call to converted loop body does not do any dispatching on it.
+                                write("\"continue\";");
+                            }
+                        }
+                        else {
+                            var labelMarker = void 0;
+                            if (node.kind === 210 /* BreakStatement */) {
+                                labelMarker = "break-" + node.label.text;
+                                setLabeledJump(convertedLoopState, /*isBreak*/ true, node.label.text, labelMarker);
+                            }
+                            else {
+                                labelMarker = "continue-" + node.label.text;
+                                setLabeledJump(convertedLoopState, /*isBreak*/ false, node.label.text, labelMarker);
+                            }
+                            write("\"" + labelMarker + "\";");
+                        }
+                        return;
+                    }
+                }
+                emitToken(node.kind === 210 /* BreakStatement */ ? 70 /* BreakKeyword */ : 75 /* ContinueKeyword */, node.pos);
+                emitOptional(" ", node.label);
+                write(";");
+            }
+            function emitReturnStatement(node) {
+                if (convertedLoopState) {
+                    convertedLoopState.nonLocalJumps |= 8 /* Return */;
+                    write("return { value: ");
+                    if (node.expression) {
+                        emit(node.expression);
+                    }
+                    else {
+                        write("void 0");
+                    }
+                    write(" };");
+                    return;
+                }
+                emitToken(94 /* ReturnKeyword */, node.pos);
+                emitOptional(" ", node.expression);
+                write(";");
+            }
+            function emitWithStatement(node) {
+                write("with (");
+                emit(node.expression);
+                write(")");
+                emitEmbeddedStatement(node.statement);
+            }
+            function emitSwitchStatement(node) {
+                var endPos = emitToken(96 /* SwitchKeyword */, node.pos);
+                write(" ");
+                emitToken(17 /* OpenParenToken */, endPos);
+                emit(node.expression);
+                endPos = emitToken(18 /* CloseParenToken */, node.expression.end);
+                write(" ");
+                var saveAllowedNonLabeledJumps;
+                if (convertedLoopState) {
+                    saveAllowedNonLabeledJumps = convertedLoopState.allowedNonLabeledJumps;
+                    // for switch statement allow only non-labeled break
+                    convertedLoopState.allowedNonLabeledJumps |= 2 /* Break */;
+                }
+                emitCaseBlock(node.caseBlock, endPos);
+                if (convertedLoopState) {
+                    convertedLoopState.allowedNonLabeledJumps = saveAllowedNonLabeledJumps;
+                }
+            }
+            function emitCaseBlock(node, startPos) {
+                emitToken(15 /* OpenBraceToken */, startPos);
+                increaseIndent();
+                emitLines(node.clauses);
+                decreaseIndent();
+                writeLine();
+                emitToken(16 /* CloseBraceToken */, node.clauses.end);
+            }
+            function nodeStartPositionsAreOnSameLine(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node1.pos)) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
+            }
+            function nodeEndPositionsAreOnSameLine(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, node2.end);
+            }
+            function nodeEndIsOnSameLineAsNodeStart(node1, node2) {
+                return ts.getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
+                    ts.getLineOfLocalPositionFromLineMap(currentLineMap, ts.skipTrivia(currentText, node2.pos));
+            }
+            function emitCaseOrDefaultClause(node) {
+                if (node.kind === 249 /* CaseClause */) {
+                    write("case ");
+                    emit(node.expression);
+                    write(":");
+                }
+                else {
+                    write("default:");
+                }
+                if (node.statements.length === 1 && nodeStartPositionsAreOnSameLine(node, node.statements[0])) {
+                    write(" ");
+                    emit(node.statements[0]);
+                }
+                else {
+                    increaseIndent();
+                    emitLines(node.statements);
+                    decreaseIndent();
+                }
+            }
+            function emitThrowStatement(node) {
+                write("throw ");
+                emit(node.expression);
+                write(";");
+            }
+            function emitTryStatement(node) {
+                write("try ");
+                emit(node.tryBlock);
+                emit(node.catchClause);
+                if (node.finallyBlock) {
+                    writeLine();
+                    write("finally ");
+                    emit(node.finallyBlock);
+                }
+            }
+            function emitCatchClause(node) {
+                writeLine();
+                var endPos = emitToken(72 /* CatchKeyword */, node.pos);
+                write(" ");
+                emitToken(17 /* OpenParenToken */, endPos);
+                emit(node.variableDeclaration);
+                emitToken(18 /* CloseParenToken */, node.variableDeclaration ? node.variableDeclaration.end : endPos);
+                write(" ");
+                emitBlock(node.block);
+            }
+            function emitDebuggerStatement(node) {
+                emitToken(76 /* DebuggerKeyword */, node.pos);
+                write(";");
+            }
+            function emitLabelAndColon(node) {
+                emit(node.label);
+                write(": ");
+            }
+            function emitLabeledStatement(node) {
+                if (!ts.isIterationStatement(node.statement, /* lookInLabeledStatements */ false) || !shouldConvertLoopBody(node.statement)) {
+                    emitLabelAndColon(node);
+                }
+                if (convertedLoopState) {
+                    if (!convertedLoopState.labels) {
+                        convertedLoopState.labels = {};
+                    }
+                    convertedLoopState.labels[node.label.text] = node.label.text;
+                }
+                emit(node.statement);
+                if (convertedLoopState) {
+                    convertedLoopState.labels[node.label.text] = undefined;
+                }
+            }
+            function getContainingModule(node) {
+                do {
+                    node = node.parent;
+                } while (node && node.kind !== 225 /* ModuleDeclaration */);
+                return node;
+            }
+            function emitContainingModuleName(node) {
+                var container = getContainingModule(node);
+                write(container ? getGeneratedNameForNode(container) : "exports");
+            }
+            function emitModuleMemberName(node) {
+                emitStart(node.name);
+                if (ts.getCombinedNodeFlags(node) & 1 /* Export */) {
+                    var container = getContainingModule(node);
+                    if (container) {
+                        write(getGeneratedNameForNode(container));
+                        write(".");
+                    }
+                    else if (modulekind !== ts.ModuleKind.ES6 && modulekind !== ts.ModuleKind.System) {
+                        write("exports.");
+                    }
+                }
+                emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                emitEnd(node.name);
+            }
+            function createVoidZero() {
+                var zero = ts.createSynthesizedNode(8 /* NumericLiteral */);
+                zero.text = "0";
+                var result = ts.createSynthesizedNode(183 /* VoidExpression */);
+                result.expression = zero;
+                return result;
+            }
+            function emitEs6ExportDefaultCompat(node) {
+                if (node.parent.kind === 256 /* SourceFile */) {
+                    ts.Debug.assert(!!(node.flags & 512 /* Default */) || node.kind === 235 /* ExportAssignment */);
+                    // only allow export default at a source file level
+                    if (modulekind === ts.ModuleKind.CommonJS || modulekind === ts.ModuleKind.AMD || modulekind === ts.ModuleKind.UMD) {
+                        if (!isEs6Module) {
+                            if (languageVersion !== 0 /* ES3 */) {
+                                // default value of configurable, enumerable, writable are `false`.
+                                write('Object.defineProperty(exports, "__esModule", { value: true });');
+                                writeLine();
+                            }
+                            else {
+                                write("exports.__esModule = true;");
+                                writeLine();
+                            }
+                        }
+                    }
+                }
+            }
+            function emitExportMemberAssignment(node) {
+                if (node.flags & 1 /* Export */) {
+                    writeLine();
+                    emitStart(node);
+                    // emit call to exporter only for top level nodes
+                    if (modulekind === ts.ModuleKind.System && node.parent === currentSourceFile) {
+                        // emit export default <smth> as
+                        // export("default", <smth>)
+                        write(exportFunctionForFile + "(\"");
+                        if (node.flags & 512 /* Default */) {
+                            write("default");
+                        }
+                        else {
+                            emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                        }
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(")");
+                    }
+                    else {
+                        if (node.flags & 512 /* Default */) {
+                            emitEs6ExportDefaultCompat(node);
+                            if (languageVersion === 0 /* ES3 */) {
+                                write('exports["default"]');
+                            }
+                            else {
+                                write("exports.default");
+                            }
+                        }
+                        else {
+                            emitModuleMemberName(node);
+                        }
+                        write(" = ");
+                        emitDeclarationName(node);
+                    }
+                    emitEnd(node);
+                    write(";");
+                }
+            }
+            function emitExportMemberAssignments(name) {
+                if (modulekind === ts.ModuleKind.System) {
+                    return;
+                }
+                if (!exportEquals && exportSpecifiers && ts.hasProperty(exportSpecifiers, name.text)) {
+                    for (var _a = 0, _b = exportSpecifiers[name.text]; _a < _b.length; _a++) {
+                        var specifier = _b[_a];
+                        writeLine();
+                        emitStart(specifier.name);
+                        emitContainingModuleName(specifier);
+                        write(".");
+                        emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                        emitEnd(specifier.name);
+                        write(" = ");
+                        emitExpressionIdentifier(name);
+                        write(";");
+                    }
+                }
+            }
+            function emitExportSpecifierInSystemModule(specifier) {
+                ts.Debug.assert(modulekind === ts.ModuleKind.System);
+                if (!resolver.getReferencedValueDeclaration(specifier.propertyName || specifier.name) && !resolver.isValueAliasDeclaration(specifier)) {
+                    return;
+                }
+                writeLine();
+                emitStart(specifier.name);
+                write(exportFunctionForFile + "(\"");
+                emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                write("\", ");
+                emitExpressionIdentifier(specifier.propertyName || specifier.name);
+                write(")");
+                emitEnd(specifier.name);
+                write(";");
+            }
+            /**
+             * Emit an assignment to a given identifier, 'name', with a given expression, 'value'.
+             * @param name an identifier as a left-hand-side operand of the assignment
+             * @param value an expression as a right-hand-side operand of the assignment
+             * @param shouldEmitCommaBeforeAssignment a boolean indicating whether to prefix an assignment with comma
+             */
+            function emitAssignment(name, value, shouldEmitCommaBeforeAssignment, nodeForSourceMap) {
+                if (shouldEmitCommaBeforeAssignment) {
+                    write(", ");
+                }
+                var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(name);
+                if (exportChanged) {
+                    write(exportFunctionForFile + "(\"");
+                    emitNodeWithCommentsAndWithoutSourcemap(name);
+                    write("\", ");
+                }
+                var isVariableDeclarationOrBindingElement = name.parent && (name.parent.kind === 218 /* VariableDeclaration */ || name.parent.kind === 169 /* BindingElement */);
+                // If this is first var declaration, we need to start at var/let/const keyword instead
+                // otherwise use nodeForSourceMap as the start position
+                emitStart(isFirstVariableDeclaration(nodeForSourceMap) ? nodeForSourceMap.parent : nodeForSourceMap);
+                withTemporaryNoSourceMap(function () {
+                    if (isVariableDeclarationOrBindingElement) {
+                        emitModuleMemberName(name.parent);
+                    }
+                    else {
+                        emit(name);
+                    }
+                    write(" = ");
+                    emit(value);
+                });
+                emitEnd(nodeForSourceMap, /*stopOverridingSpan*/ true);
+                if (exportChanged) {
+                    write(")");
+                }
+            }
+            /**
+             * Create temporary variable, emit an assignment of the variable the given expression
+             * @param expression an expression to assign to the newly created temporary variable
+             * @param canDefineTempVariablesInPlace a boolean indicating whether you can define the temporary variable at an assignment location
+             * @param shouldEmitCommaBeforeAssignment a boolean indicating whether an assignment should prefix with comma
+             */
+            function emitTempVariableAssignment(expression, canDefineTempVariablesInPlace, shouldEmitCommaBeforeAssignment, sourceMapNode) {
+                var identifier = createTempVariable(0 /* Auto */);
+                if (!canDefineTempVariablesInPlace) {
+                    recordTempDeclaration(identifier);
+                }
+                emitAssignment(identifier, expression, shouldEmitCommaBeforeAssignment, sourceMapNode || expression.parent);
+                return identifier;
+            }
+            function isFirstVariableDeclaration(root) {
+                return root.kind === 218 /* VariableDeclaration */ &&
+                    root.parent.kind === 219 /* VariableDeclarationList */ &&
+                    root.parent.declarations[0] === root;
+            }
+            function emitDestructuring(root, isAssignmentExpressionStatement, value) {
+                var emitCount = 0;
+                // An exported declaration is actually emitted as an assignment (to a property on the module object), so
+                // temporary variables in an exported declaration need to have real declarations elsewhere
+                // Also temporary variables should be explicitly allocated for source level declarations when module target is system
+                // because actual variable declarations are hoisted
+                var canDefineTempVariablesInPlace = false;
+                if (root.kind === 218 /* VariableDeclaration */) {
+                    var isExported = ts.getCombinedNodeFlags(root) & 1 /* Export */;
+                    var isSourceLevelForSystemModuleKind = shouldHoistDeclarationInSystemJsModule(root);
+                    canDefineTempVariablesInPlace = !isExported && !isSourceLevelForSystemModuleKind;
+                }
+                else if (root.kind === 142 /* Parameter */) {
+                    canDefineTempVariablesInPlace = true;
+                }
+                if (root.kind === 187 /* BinaryExpression */) {
+                    emitAssignmentExpression(root);
+                }
+                else {
+                    ts.Debug.assert(!isAssignmentExpressionStatement);
+                    // If first variable declaration of variable statement correct the start location
+                    if (isFirstVariableDeclaration(root)) {
+                        // Use emit location of "var " as next emit start entry
+                        sourceMap.changeEmitSourcePos();
+                    }
+                    emitBindingElement(root, value);
+                }
+                /**
+                 * Ensures that there exists a declared identifier whose value holds the given expression.
+                 * This function is useful to ensure that the expression's value can be read from in subsequent expressions.
+                 * Unless 'reuseIdentifierExpressions' is false, 'expr' will be returned if it is just an identifier.
+                 *
+                 * @param expr the expression whose value needs to be bound.
+                 * @param reuseIdentifierExpressions true if identifier expressions can simply be returned;
+                 *                                   false if it is necessary to always emit an identifier.
+                 */
+                function ensureIdentifier(expr, reuseIdentifierExpressions, sourceMapNode) {
+                    if (expr.kind === 69 /* Identifier */ && reuseIdentifierExpressions) {
+                        return expr;
+                    }
+                    var identifier = emitTempVariableAssignment(expr, canDefineTempVariablesInPlace, emitCount > 0, sourceMapNode);
+                    emitCount++;
+                    return identifier;
+                }
+                function createDefaultValueCheck(value, defaultValue, sourceMapNode) {
+                    // The value expression will be evaluated twice, so for anything but a simple identifier
+                    // we need to generate a temporary variable
+                    // If the temporary variable needs to be emitted use the source Map node for assignment of that statement
+                    value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode);
+                    // Return the expression 'value === void 0 ? defaultValue : value'
+                    var equals = ts.createSynthesizedNode(187 /* BinaryExpression */);
+                    equals.left = value;
+                    equals.operatorToken = ts.createSynthesizedNode(32 /* EqualsEqualsEqualsToken */);
+                    equals.right = createVoidZero();
+                    return createConditionalExpression(equals, defaultValue, value);
+                }
+                function createConditionalExpression(condition, whenTrue, whenFalse) {
+                    var cond = ts.createSynthesizedNode(188 /* ConditionalExpression */);
+                    cond.condition = condition;
+                    cond.questionToken = ts.createSynthesizedNode(53 /* QuestionToken */);
+                    cond.whenTrue = whenTrue;
+                    cond.colonToken = ts.createSynthesizedNode(54 /* ColonToken */);
+                    cond.whenFalse = whenFalse;
+                    return cond;
+                }
+                function createNumericLiteral(value) {
+                    var node = ts.createSynthesizedNode(8 /* NumericLiteral */);
+                    node.text = "" + value;
+                    return node;
+                }
+                function createPropertyAccessForDestructuringProperty(object, propName) {
+                    var index;
+                    var nameIsComputed = propName.kind === 140 /* ComputedPropertyName */;
+                    if (nameIsComputed) {
+                        // TODO to handle when we look into sourcemaps for computed properties, for now use propName
+                        index = ensureIdentifier(propName.expression, /*reuseIdentifierExpressions*/ false, propName);
+                    }
+                    else {
+                        // We create a synthetic copy of the identifier in order to avoid the rewriting that might
+                        // otherwise occur when the identifier is emitted.
+                        index = ts.createSynthesizedNode(propName.kind);
+                        // We need to unescape identifier here because when parsing an identifier prefixing with "__"
+                        // the parser need to append "_" in order to escape colliding with magic identifiers such as "__proto__"
+                        // Therefore, in order to correctly emit identifiers that are written in original TypeScript file,
+                        // we will unescapeIdentifier to remove additional underscore (if no underscore is added, the function will return original input string)
+                        index.text = ts.unescapeIdentifier(propName.text);
+                    }
+                    return !nameIsComputed && index.kind === 69 /* Identifier */
+                        ? createPropertyAccessExpression(object, index)
+                        : createElementAccessExpression(object, index);
+                }
+                function createSliceCall(value, sliceIndex) {
+                    var call = ts.createSynthesizedNode(174 /* CallExpression */);
+                    var sliceIdentifier = ts.createSynthesizedNode(69 /* Identifier */);
+                    sliceIdentifier.text = "slice";
+                    call.expression = createPropertyAccessExpression(value, sliceIdentifier);
+                    call.arguments = ts.createSynthesizedNodeArray();
+                    call.arguments[0] = createNumericLiteral(sliceIndex);
+                    return call;
+                }
+                function emitObjectLiteralAssignment(target, value, sourceMapNode) {
+                    var properties = target.properties;
+                    if (properties.length !== 1) {
+                        // For anything but a single element destructuring we need to generate a temporary
+                        // to ensure value is evaluated exactly once.
+                        // When doing so we want to highlight the passed in source map node since thats the one needing this temp assignment
+                        value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode);
+                    }
+                    for (var _a = 0, properties_5 = properties; _a < properties_5.length; _a++) {
+                        var p = properties_5[_a];
+                        if (p.kind === 253 /* PropertyAssignment */ || p.kind === 254 /* ShorthandPropertyAssignment */) {
+                            var propName = p.name;
+                            var target_1 = p.kind === 254 /* ShorthandPropertyAssignment */ ? p : p.initializer || propName;
+                            // Assignment for target = value.propName should highlight whole property, hence use p as source map node
+                            emitDestructuringAssignment(target_1, createPropertyAccessForDestructuringProperty(value, propName), p);
+                        }
+                    }
+                }
+                function emitArrayLiteralAssignment(target, value, sourceMapNode) {
+                    var elements = target.elements;
+                    if (elements.length !== 1) {
+                        // For anything but a single element destructuring we need to generate a temporary
+                        // to ensure value is evaluated exactly once.
+                        // When doing so we want to highlight the passed in source map node since thats the one needing this temp assignment
+                        value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, sourceMapNode);
+                    }
+                    for (var i = 0; i < elements.length; i++) {
+                        var e = elements[i];
+                        if (e.kind !== 193 /* OmittedExpression */) {
+                            // Assignment for target = value.propName should highlight whole property, hence use e as source map node
+                            if (e.kind !== 191 /* SpreadElementExpression */) {
+                                emitDestructuringAssignment(e, createElementAccessExpression(value, createNumericLiteral(i)), e);
+                            }
+                            else if (i === elements.length - 1) {
+                                emitDestructuringAssignment(e.expression, createSliceCall(value, i), e);
+                            }
+                        }
+                    }
+                }
+                function emitDestructuringAssignment(target, value, sourceMapNode) {
+                    // When emitting target = value use source map node to highlight, including any temporary assignments needed for this
+                    if (target.kind === 254 /* ShorthandPropertyAssignment */) {
+                        if (target.objectAssignmentInitializer) {
+                            value = createDefaultValueCheck(value, target.objectAssignmentInitializer, sourceMapNode);
+                        }
+                        target = target.name;
+                    }
+                    else if (target.kind === 187 /* BinaryExpression */ && target.operatorToken.kind === 56 /* EqualsToken */) {
+                        value = createDefaultValueCheck(value, target.right, sourceMapNode);
+                        target = target.left;
+                    }
+                    if (target.kind === 171 /* ObjectLiteralExpression */) {
+                        emitObjectLiteralAssignment(target, value, sourceMapNode);
+                    }
+                    else if (target.kind === 170 /* ArrayLiteralExpression */) {
+                        emitArrayLiteralAssignment(target, value, sourceMapNode);
+                    }
+                    else {
+                        emitAssignment(target, value, /*shouldEmitCommaBeforeAssignment*/ emitCount > 0, sourceMapNode);
+                        emitCount++;
+                    }
+                }
+                function emitAssignmentExpression(root) {
+                    var target = root.left;
+                    var value = root.right;
+                    if (ts.isEmptyObjectLiteralOrArrayLiteral(target)) {
+                        emit(value);
+                    }
+                    else if (isAssignmentExpressionStatement) {
+                        // Source map node for root.left = root.right is root
+                        // but if root is synthetic, which could be in below case, use the target which is { a }
+                        // for ({a} of {a: string}) {
+                        // }
+                        emitDestructuringAssignment(target, value, ts.nodeIsSynthesized(root) ? target : root);
+                    }
+                    else {
+                        if (root.parent.kind !== 178 /* ParenthesizedExpression */) {
+                            write("(");
+                        }
+                        // Temporary assignment needed to emit root should highlight whole binary expression
+                        value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ true, root);
+                        // Source map node for root.left = root.right is root
+                        emitDestructuringAssignment(target, value, root);
+                        write(", ");
+                        emit(value);
+                        if (root.parent.kind !== 178 /* ParenthesizedExpression */) {
+                            write(")");
+                        }
+                    }
+                }
+                function emitBindingElement(target, value) {
+                    // Any temporary assignments needed to emit target = value should point to target
+                    if (target.initializer) {
+                        // Combine value and initializer
+                        value = value ? createDefaultValueCheck(value, target.initializer, target) : target.initializer;
+                    }
+                    else if (!value) {
+                        // Use 'void 0' in absence of value and initializer
+                        value = createVoidZero();
+                    }
+                    if (ts.isBindingPattern(target.name)) {
+                        var pattern = target.name;
+                        var elements = pattern.elements;
+                        var numElements = elements.length;
+                        if (numElements !== 1) {
+                            // For anything other than a single-element destructuring we need to generate a temporary
+                            // to ensure value is evaluated exactly once. Additionally, if we have zero elements
+                            // we need to emit *something* to ensure that in case a 'var' keyword was already emitted,
+                            // so in that case, we'll intentionally create that temporary.
+                            value = ensureIdentifier(value, /*reuseIdentifierExpressions*/ numElements !== 0, target);
+                        }
+                        for (var i = 0; i < numElements; i++) {
+                            var element = elements[i];
+                            if (pattern.kind === 167 /* ObjectBindingPattern */) {
+                                // Rewrite element to a declaration with an initializer that fetches property
+                                var propName = element.propertyName || element.name;
+                                emitBindingElement(element, createPropertyAccessForDestructuringProperty(value, propName));
+                            }
+                            else if (element.kind !== 193 /* OmittedExpression */) {
+                                if (!element.dotDotDotToken) {
+                                    // Rewrite element to a declaration that accesses array element at index i
+                                    emitBindingElement(element, createElementAccessExpression(value, createNumericLiteral(i)));
+                                }
+                                else if (i === numElements - 1) {
+                                    emitBindingElement(element, createSliceCall(value, i));
+                                }
+                            }
+                        }
+                    }
+                    else {
+                        emitAssignment(target.name, value, /*shouldEmitCommaBeforeAssignment*/ emitCount > 0, target);
+                        emitCount++;
+                    }
+                }
+            }
+            function emitVariableDeclaration(node) {
+                if (ts.isBindingPattern(node.name)) {
+                    var isExported = ts.getCombinedNodeFlags(node) & 1 /* Export */;
+                    if (languageVersion >= 2 /* ES6 */ && (!isExported || modulekind === ts.ModuleKind.ES6)) {
+                        // emit ES6 destructuring only if target module is ES6 or variable is not exported
+                        // exported variables in CJS/AMD are prefixed with 'exports.' so result javascript { exports.toString } = 1; is illegal
+                        var isTopLevelDeclarationInSystemModule = modulekind === ts.ModuleKind.System &&
+                            shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ true);
+                        if (isTopLevelDeclarationInSystemModule) {
+                            // In System modules top level variables are hoisted
+                            // so variable declarations with destructuring are turned into destructuring assignments.
+                            // As a result, they will need parentheses to disambiguate object binding assignments from blocks.
+                            write("(");
+                        }
+                        emit(node.name);
+                        emitOptional(" = ", node.initializer);
+                        if (isTopLevelDeclarationInSystemModule) {
+                            write(")");
+                        }
+                    }
+                    else {
+                        emitDestructuring(node, /*isAssignmentExpressionStatement*/ false);
+                    }
+                }
+                else {
+                    var initializer = node.initializer;
+                    if (!initializer &&
+                        languageVersion < 2 /* ES6 */ &&
+                        // for names - binding patterns that lack initializer there is no point to emit explicit initializer
+                        // since downlevel codegen for destructuring will fail in the absence of initializer so all binding elements will say uninitialized
+                        node.name.kind === 69 /* Identifier */) {
+                        var container = ts.getEnclosingBlockScopeContainer(node);
+                        var flags = resolver.getNodeCheckFlags(node);
+                        // nested let bindings might need to be initialized explicitly to preserve ES6 semantic
+                        // { let x = 1; }
+                        // { let x; } // x here should be undefined. not 1
+                        // NOTES:
+                        // Top level bindings never collide with anything and thus don't require explicit initialization.
+                        // As for nested let bindings there are two cases:
+                        // - nested let bindings that were not renamed definitely should be initialized explicitly
+                        //   { let x = 1; }
+                        //   { let x; if (some-condition) { x = 1}; if (x) { /*1*/ } }
+                        //   Without explicit initialization code in /*1*/ can be executed even if some-condition is evaluated to false
+                        // - renaming introduces fresh name that should not collide with any existing names, however renamed bindings sometimes also should be
+                        //   explicitly initialized. One particular case: non-captured binding declared inside loop body (but not in loop initializer)
+                        //   let x;
+                        //   for (;;) {
+                        //       let x;
+                        //   }
+                        //   in downlevel codegen inner 'x' will be renamed so it won't collide with outer 'x' however it will should be reset on every iteration
+                        //   as if it was declared anew.
+                        //   * Why non-captured binding - because if loop contains block scoped binding captured in some function then loop body will be rewritten
+                        //   to have a fresh scope on every iteration so everything will just work.
+                        //   * Why loop initializer is excluded - since we've introduced a fresh name it already will be undefined.
+                        var isCapturedInFunction = flags & 131072 /* CapturedBlockScopedBinding */;
+                        var isDeclaredInLoop = flags & 262144 /* BlockScopedBindingInLoop */;
+                        var emittedAsTopLevel = ts.isBlockScopedContainerTopLevel(container) ||
+                            (isCapturedInFunction && isDeclaredInLoop && container.kind === 199 /* Block */ && ts.isIterationStatement(container.parent, /*lookInLabeledStatements*/ false));
+                        var emittedAsNestedLetDeclaration = ts.getCombinedNodeFlags(node) & 1024 /* Let */ &&
+                            !emittedAsTopLevel;
+                        var emitExplicitInitializer = emittedAsNestedLetDeclaration &&
+                            container.kind !== 207 /* ForInStatement */ &&
+                            container.kind !== 208 /* ForOfStatement */ &&
+                            (!resolver.isDeclarationWithCollidingName(node) ||
+                                (isDeclaredInLoop && !isCapturedInFunction && !ts.isIterationStatement(container, /*lookInLabeledStatements*/ false)));
+                        if (emitExplicitInitializer) {
+                            initializer = createVoidZero();
+                        }
+                    }
+                    var exportChanged = isNameOfExportedSourceLevelDeclarationInSystemExternalModule(node.name);
+                    if (exportChanged) {
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                        write("\", ");
+                    }
+                    emitModuleMemberName(node);
+                    emitOptional(" = ", initializer);
+                    if (exportChanged) {
+                        write(")");
+                    }
+                }
+            }
+            function emitExportVariableAssignments(node) {
+                if (node.kind === 193 /* OmittedExpression */) {
+                    return;
+                }
+                var name = node.name;
+                if (name.kind === 69 /* Identifier */) {
+                    emitExportMemberAssignments(name);
+                }
+                else if (ts.isBindingPattern(name)) {
+                    ts.forEach(name.elements, emitExportVariableAssignments);
+                }
+            }
+            function isES6ExportedDeclaration(node) {
+                return !!(node.flags & 1 /* Export */) &&
+                    modulekind === ts.ModuleKind.ES6 &&
+                    node.parent.kind === 256 /* SourceFile */;
+            }
+            function emitVariableStatement(node) {
+                var startIsEmitted = false;
+                if (node.flags & 1 /* Export */) {
+                    if (isES6ExportedDeclaration(node)) {
+                        // Exported ES6 module member
+                        write("export ");
+                        startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
+                    }
+                }
+                else {
+                    startIsEmitted = tryEmitStartOfVariableDeclarationList(node.declarationList);
+                }
+                if (startIsEmitted) {
+                    emitCommaList(node.declarationList.declarations);
+                    write(";");
+                }
+                else {
+                    var atLeastOneItem = emitVariableDeclarationListSkippingUninitializedEntries(node.declarationList);
+                    if (atLeastOneItem) {
+                        write(";");
+                    }
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
+                    ts.forEach(node.declarationList.declarations, emitExportVariableAssignments);
+                }
+            }
+            function shouldEmitLeadingAndTrailingCommentsForVariableStatement(node) {
+                // If we're not exporting the variables, there's nothing special here.
+                // Always emit comments for these nodes.
+                if (!(node.flags & 1 /* Export */)) {
+                    return true;
+                }
+                // If we are exporting, but it's a top-level ES6 module exports,
+                // we'll emit the declaration list verbatim, so emit comments too.
+                if (isES6ExportedDeclaration(node)) {
+                    return true;
+                }
+                // Otherwise, only emit if we have at least one initializer present.
+                for (var _a = 0, _b = node.declarationList.declarations; _a < _b.length; _a++) {
+                    var declaration = _b[_a];
+                    if (declaration.initializer) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function emitParameter(node) {
+                if (languageVersion < 2 /* ES6 */) {
+                    if (ts.isBindingPattern(node.name)) {
+                        var name_29 = createTempVariable(0 /* Auto */);
+                        if (!tempParameters) {
+                            tempParameters = [];
+                        }
+                        tempParameters.push(name_29);
+                        emit(name_29);
+                    }
+                    else {
+                        emit(node.name);
+                    }
+                }
+                else {
+                    if (node.dotDotDotToken) {
+                        write("...");
+                    }
+                    emit(node.name);
+                    emitOptional(" = ", node.initializer);
+                }
+            }
+            function emitDefaultValueAssignments(node) {
+                if (languageVersion < 2 /* ES6 */) {
+                    var tempIndex_1 = 0;
+                    ts.forEach(node.parameters, function (parameter) {
+                        // A rest parameter cannot have a binding pattern or an initializer,
+                        // so let's just ignore it.
+                        if (parameter.dotDotDotToken) {
+                            return;
+                        }
+                        var paramName = parameter.name, initializer = parameter.initializer;
+                        if (ts.isBindingPattern(paramName)) {
+                            // In cases where a binding pattern is simply '[]' or '{}',
+                            // we usually don't want to emit a var declaration; however, in the presence
+                            // of an initializer, we must emit that expression to preserve side effects.
+                            var hasBindingElements = paramName.elements.length > 0;
+                            if (hasBindingElements || initializer) {
+                                writeLine();
+                                write("var ");
+                                if (hasBindingElements) {
+                                    emitDestructuring(parameter, /*isAssignmentExpressionStatement*/ false, tempParameters[tempIndex_1]);
+                                }
+                                else {
+                                    emit(tempParameters[tempIndex_1]);
+                                    write(" = ");
+                                    emit(initializer);
+                                }
+                                write(";");
+                                tempIndex_1++;
+                            }
+                        }
+                        else if (initializer) {
+                            writeLine();
+                            emitStart(parameter);
+                            write("if (");
+                            emitNodeWithoutSourceMap(paramName);
+                            write(" === void 0)");
+                            emitEnd(parameter);
+                            write(" { ");
+                            emitStart(parameter);
+                            emitNodeWithCommentsAndWithoutSourcemap(paramName);
+                            write(" = ");
+                            emitNodeWithCommentsAndWithoutSourcemap(initializer);
+                            emitEnd(parameter);
+                            write("; }");
+                        }
+                    });
+                }
+            }
+            function emitRestParameter(node) {
+                if (languageVersion < 2 /* ES6 */ && ts.hasDeclaredRestParameter(node)) {
+                    var restIndex = node.parameters.length - 1;
+                    var restParam = node.parameters[restIndex];
+                    // A rest parameter cannot have a binding pattern, so let's just ignore it if it does.
+                    if (ts.isBindingPattern(restParam.name)) {
+                        return;
+                    }
+                    var tempName = createTempVariable(268435456 /* _i */).text;
+                    writeLine();
+                    emitLeadingComments(restParam);
+                    emitStart(restParam);
+                    write("var ");
+                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
+                    write(" = [];");
+                    emitEnd(restParam);
+                    emitTrailingComments(restParam);
+                    writeLine();
+                    write("for (");
+                    emitStart(restParam);
+                    write("var " + tempName + " = " + restIndex + ";");
+                    emitEnd(restParam);
+                    write(" ");
+                    emitStart(restParam);
+                    write(tempName + " < arguments.length;");
+                    emitEnd(restParam);
+                    write(" ");
+                    emitStart(restParam);
+                    write(tempName + "++");
+                    emitEnd(restParam);
+                    write(") {");
+                    increaseIndent();
+                    writeLine();
+                    emitStart(restParam);
+                    emitNodeWithCommentsAndWithoutSourcemap(restParam.name);
+                    write("[" + tempName + " - " + restIndex + "] = arguments[" + tempName + "];");
+                    emitEnd(restParam);
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function emitAccessor(node) {
+                write(node.kind === 149 /* GetAccessor */ ? "get " : "set ");
+                emit(node.name);
+                emitSignatureAndBody(node);
+            }
+            function shouldEmitAsArrowFunction(node) {
+                return node.kind === 180 /* ArrowFunction */ && languageVersion >= 2 /* ES6 */;
+            }
+            function emitDeclarationName(node) {
+                if (node.name) {
+                    emitNodeWithCommentsAndWithoutSourcemap(node.name);
+                }
+                else {
+                    write(getGeneratedNameForNode(node));
+                }
+            }
+            function shouldEmitFunctionName(node) {
+                if (node.kind === 179 /* FunctionExpression */) {
+                    // Emit name if one is present
+                    return !!node.name;
+                }
+                if (node.kind === 220 /* FunctionDeclaration */) {
+                    // Emit name if one is present, or emit generated name in down-level case (for export default case)
+                    return !!node.name || modulekind !== ts.ModuleKind.ES6;
+                }
+            }
+            function emitFunctionDeclaration(node) {
+                if (ts.nodeIsMissing(node.body)) {
+                    return emitCommentsOnNotEmittedNode(node);
+                }
+                // TODO (yuisu) : we should not have special cases to condition emitting comments
+                // but have one place to fix check for these conditions.
+                var kind = node.kind, parent = node.parent;
+                if (kind !== 147 /* MethodDeclaration */ &&
+                    kind !== 146 /* MethodSignature */ &&
+                    parent &&
+                    parent.kind !== 253 /* PropertyAssignment */ &&
+                    parent.kind !== 174 /* CallExpression */ &&
+                    parent.kind !== 170 /* ArrayLiteralExpression */) {
+                    // 1. Methods will emit comments at their assignment declaration sites.
+                    //
+                    // 2. If the function is a property of object literal, emitting leading-comments
+                    //    is done by emitNodeWithoutSourceMap which then call this function.
+                    //    In particular, we would like to avoid emit comments twice in following case:
+                    //
+                    //          var obj = {
+                    //              id:
+                    //                  /*comment*/ () => void
+                    //          }
+                    //
+                    // 3. If the function is an argument in call expression, emitting of comments will be
+                    //    taken care of in emit list of arguments inside of 'emitCallExpression'.
+                    //
+                    // 4. If the function is in an array literal, 'emitLinePreservingList' will take care
+                    //    of leading comments.
+                    emitLeadingComments(node);
+                }
+                emitStart(node);
+                // For targeting below es6, emit functions-like declaration including arrow function using function keyword.
+                // When targeting ES6, emit arrow function natively in ES6 by omitting function keyword and using fat arrow instead
+                if (!shouldEmitAsArrowFunction(node)) {
+                    if (isES6ExportedDeclaration(node)) {
+                        write("export ");
+                        if (node.flags & 512 /* Default */) {
+                            write("default ");
+                        }
+                    }
+                    write("function");
+                    if (languageVersion >= 2 /* ES6 */ && node.asteriskToken) {
+                        write("*");
+                    }
+                    write(" ");
+                }
+                if (shouldEmitFunctionName(node)) {
+                    emitDeclarationName(node);
+                }
+                emitSignatureAndBody(node);
+                if (modulekind !== ts.ModuleKind.ES6 && kind === 220 /* FunctionDeclaration */ && parent === currentSourceFile && node.name) {
+                    emitExportMemberAssignments(node.name);
+                }
+                emitEnd(node);
+                if (kind !== 147 /* MethodDeclaration */ &&
+                    kind !== 146 /* MethodSignature */ &&
+                    kind !== 180 /* ArrowFunction */) {
+                    emitTrailingComments(node);
+                }
+            }
+            function emitCaptureThisForNodeIfNecessary(node) {
+                if (resolver.getNodeCheckFlags(node) & 4 /* CaptureThis */) {
+                    writeLine();
+                    emitStart(node);
+                    write("var _this = this;");
+                    emitEnd(node);
+                }
+            }
+            function emitSignatureParameters(node) {
+                increaseIndent();
+                write("(");
+                if (node) {
+                    var parameters = node.parameters;
+                    var skipCount = node.parameters.length && node.parameters[0].name.text === "this" ? 1 : 0;
+                    var omitCount = languageVersion < 2 /* ES6 */ && ts.hasDeclaredRestParameter(node) ? 1 : 0;
+                    emitList(parameters, skipCount, parameters.length - omitCount - skipCount, /*multiLine*/ false, /*trailingComma*/ false);
+                }
+                write(")");
+                decreaseIndent();
+            }
+            function emitSignatureParametersForArrow(node) {
+                // Check whether the parameter list needs parentheses and preserve no-parenthesis
+                if (node.parameters.length === 1 && node.pos === node.parameters[0].pos) {
+                    emit(node.parameters[0]);
+                    return;
+                }
+                emitSignatureParameters(node);
+            }
+            function emitAsyncFunctionBodyForES6(node) {
+                var promiseConstructor = ts.getEntityNameFromTypeNode(node.type);
+                var isArrowFunction = node.kind === 180 /* ArrowFunction */;
+                var hasLexicalArguments = (resolver.getNodeCheckFlags(node) & 8192 /* CaptureArguments */) !== 0;
+                // An async function is emit as an outer function that calls an inner
+                // generator function. To preserve lexical bindings, we pass the current
+                // `this` and `arguments` objects to `__awaiter`. The generator function
+                // passed to `__awaiter` is executed inside of the callback to the
+                // promise constructor.
+                //
+                // The emit for an async arrow without a lexical `arguments` binding might be:
+                //
+                //  // input
+                //  let a = async (b) => { await b; }
+                //
+                //  // output
+                //  let a = (b) => __awaiter(this, void 0, void 0, function* () {
+                //      yield b;
+                //  });
+                //
+                // The emit for an async arrow with a lexical `arguments` binding might be:
+                //
+                //  // input
+                //  let a = async (b) => { await arguments[0]; }
+                //
+                //  // output
+                //  let a = (b) => __awaiter(this, arguments, void 0, function* (arguments) {
+                //      yield arguments[0];
+                //  });
+                //
+                // The emit for an async function expression without a lexical `arguments` binding
+                // might be:
+                //
+                //  // input
+                //  let a = async function (b) {
+                //      await b;
+                //  }
+                //
+                //  // output
+                //  let a = function (b) {
+                //      return __awaiter(this, void 0, void 0, function* () {
+                //          yield b;
+                //      });
+                //  }
+                //
+                // The emit for an async function expression with a lexical `arguments` binding
+                // might be:
+                //
+                //  // input
+                //  let a = async function (b) {
+                //      await arguments[0];
+                //  }
+                //
+                //  // output
+                //  let a = function (b) {
+                //      return __awaiter(this, arguments, void 0, function* (_arguments) {
+                //          yield _arguments[0];
+                //      });
+                //  }
+                //
+                // The emit for an async function expression with a lexical `arguments` binding
+                // and a return type annotation might be:
+                //
+                //  // input
+                //  let a = async function (b): MyPromise<any> {
+                //      await arguments[0];
+                //  }
+                //
+                //  // output
+                //  let a = function (b) {
+                //      return __awaiter(this, arguments, MyPromise, function* (_arguments) {
+                //          yield _arguments[0];
+                //      });
+                //  }
+                //
+                // If this is not an async arrow, emit the opening brace of the function body
+                // and the start of the return statement.
+                if (!isArrowFunction) {
+                    write(" {");
+                    increaseIndent();
+                    writeLine();
+                    if (resolver.getNodeCheckFlags(node) & 4096 /* AsyncMethodWithSuperBinding */) {
+                        writeLines("\nconst _super = (function (geti, seti) {\n    const cache = Object.create(null);\n    return name => cache[name] || (cache[name] = { get value() { return geti(name); }, set value(v) { seti(name, v); } });\n})(name => super[name], (name, value) => super[name] = value);");
+                        writeLine();
+                    }
+                    else if (resolver.getNodeCheckFlags(node) & 2048 /* AsyncMethodWithSuper */) {
+                        write("const _super = name => super[name];");
+                        writeLine();
+                    }
+                    write("return");
+                }
+                write(" __awaiter(this");
+                if (hasLexicalArguments) {
+                    write(", arguments, ");
+                }
+                else {
+                    write(", void 0, ");
+                }
+                if (languageVersion >= 2 /* ES6 */ || !promiseConstructor) {
+                    write("void 0");
+                }
+                else {
+                    emitEntityNameAsExpression(promiseConstructor, /*useFallback*/ false);
+                }
+                // Emit the call to __awaiter.
+                write(", function* ()");
+                // Emit the signature and body for the inner generator function.
+                emitFunctionBody(node);
+                write(")");
+                // If this is not an async arrow, emit the closing brace of the outer function body.
+                if (!isArrowFunction) {
+                    write(";");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function emitFunctionBody(node) {
+                if (!node.body) {
+                    // There can be no body when there are parse errors.  Just emit an empty block
+                    // in that case.
+                    write(" { }");
+                }
+                else {
+                    if (node.body.kind === 199 /* Block */) {
+                        emitBlockFunctionBody(node, node.body);
+                    }
+                    else {
+                        emitExpressionFunctionBody(node, node.body);
+                    }
+                }
+            }
+            function emitSignatureAndBody(node) {
+                var saveConvertedLoopState = convertedLoopState;
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                // When targeting ES6, emit arrow function natively in ES6
+                if (shouldEmitAsArrowFunction(node)) {
+                    emitSignatureParametersForArrow(node);
+                    write(" =>");
+                }
+                else {
+                    emitSignatureParameters(node);
+                }
+                var isAsync = ts.isAsyncFunctionLike(node);
+                if (isAsync) {
+                    emitAsyncFunctionBodyForES6(node);
+                }
+                else {
+                    emitFunctionBody(node);
+                }
+                if (!isES6ExportedDeclaration(node)) {
+                    emitExportMemberAssignment(node);
+                }
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+            }
+            // Returns true if any preamble code was emitted.
+            function emitFunctionBodyPreamble(node) {
+                emitCaptureThisForNodeIfNecessary(node);
+                emitDefaultValueAssignments(node);
+                emitRestParameter(node);
+            }
+            function emitExpressionFunctionBody(node, body) {
+                if (languageVersion < 2 /* ES6 */ || node.flags & 256 /* Async */) {
+                    emitDownLevelExpressionFunctionBody(node, body);
+                    return;
+                }
+                // For es6 and higher we can emit the expression as is.  However, in the case
+                // where the expression might end up looking like a block when emitted, we'll
+                // also wrap it in parentheses first.  For example if you have: a => <foo>{}
+                // then we need to generate: a => ({})
+                write(" ");
+                // Unwrap all type assertions.
+                var current = body;
+                while (current.kind === 177 /* TypeAssertionExpression */) {
+                    current = current.expression;
+                }
+                emitParenthesizedIf(body, current.kind === 171 /* ObjectLiteralExpression */);
+            }
+            function emitDownLevelExpressionFunctionBody(node, body) {
+                write(" {");
+                increaseIndent();
+                var outPos = writer.getTextPos();
+                emitDetachedCommentsAndUpdateCommentsInfo(node.body);
+                emitFunctionBodyPreamble(node);
+                var preambleEmitted = writer.getTextPos() !== outPos;
+                decreaseIndent();
+                // If we didn't have to emit any preamble code, then attempt to keep the arrow
+                // function on one line.
+                if (!preambleEmitted && nodeStartPositionsAreOnSameLine(node, body)) {
+                    write(" ");
+                    emitStart(body);
+                    write("return ");
+                    emit(body);
+                    emitEnd(body);
+                    write(";");
+                    emitTempDeclarations(/*newLine*/ false);
+                    write(" ");
+                }
+                else {
+                    increaseIndent();
+                    writeLine();
+                    emitLeadingComments(node.body);
+                    emitStart(body);
+                    write("return ");
+                    emit(body);
+                    emitEnd(body);
+                    write(";");
+                    emitTrailingComments(node.body);
+                    emitTempDeclarations(/*newLine*/ true);
+                    decreaseIndent();
+                    writeLine();
+                }
+                emitStart(node.body);
+                write("}");
+                emitEnd(node.body);
+            }
+            function emitBlockFunctionBody(node, body) {
+                write(" {");
+                var initialTextPos = writer.getTextPos();
+                increaseIndent();
+                emitDetachedCommentsAndUpdateCommentsInfo(body.statements);
+                // Emit all the directive prologues (like "use strict").  These have to come before
+                // any other preamble code we write (like parameter initializers).
+                var startIndex = emitDirectivePrologues(body.statements, /*startWithNewLine*/ true);
+                emitFunctionBodyPreamble(node);
+                decreaseIndent();
+                var preambleEmitted = writer.getTextPos() !== initialTextPos;
+                if (!preambleEmitted && nodeEndIsOnSameLineAsNodeStart(body, body)) {
+                    for (var _a = 0, _b = body.statements; _a < _b.length; _a++) {
+                        var statement = _b[_a];
+                        write(" ");
+                        emit(statement);
+                    }
+                    emitTempDeclarations(/*newLine*/ false);
+                    write(" ");
+                    emitLeadingCommentsOfPosition(body.statements.end);
+                }
+                else {
+                    increaseIndent();
+                    emitLinesStartingAt(body.statements, startIndex);
+                    emitTempDeclarations(/*newLine*/ true);
+                    writeLine();
+                    emitLeadingCommentsOfPosition(body.statements.end);
+                    decreaseIndent();
+                }
+                emitToken(16 /* CloseBraceToken */, body.statements.end);
+            }
+            /**
+             * Return the statement at a given index if it is a super-call statement
+             * @param ctor a constructor declaration
+             * @param index an index to constructor's body to check
+             */
+            function getSuperCallAtGivenIndex(ctor, index) {
+                if (!ctor.body) {
+                    return undefined;
+                }
+                var statements = ctor.body.statements;
+                if (!statements || index >= statements.length) {
+                    return undefined;
+                }
+                var statement = statements[index];
+                if (statement.kind === 202 /* ExpressionStatement */) {
+                    return ts.isSuperCallExpression(statement.expression) ? statement : undefined;
+                }
+            }
+            function emitParameterPropertyAssignments(node) {
+                ts.forEach(node.parameters, function (param) {
+                    if (param.flags & 92 /* ParameterPropertyModifier */) {
+                        writeLine();
+                        emitStart(param);
+                        emitStart(param.name);
+                        write("this.");
+                        emitNodeWithoutSourceMap(param.name);
+                        emitEnd(param.name);
+                        write(" = ");
+                        emit(param.name);
+                        write(";");
+                        emitEnd(param);
+                    }
+                });
+            }
+            function emitMemberAccessForPropertyName(memberName) {
+                // This does not emit source map because it is emitted by caller as caller
+                // is aware how the property name changes to the property access
+                // eg. public x = 10; becomes this.x and static x = 10 becomes className.x
+                if (memberName.kind === 9 /* StringLiteral */ || memberName.kind === 8 /* NumericLiteral */) {
+                    write("[");
+                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
+                    write("]");
+                }
+                else if (memberName.kind === 140 /* ComputedPropertyName */) {
+                    emitComputedPropertyName(memberName);
+                }
+                else {
+                    write(".");
+                    emitNodeWithCommentsAndWithoutSourcemap(memberName);
+                }
+            }
+            function getInitializedProperties(node, isStatic) {
+                var properties = [];
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    if (member.kind === 145 /* PropertyDeclaration */ && isStatic === ((member.flags & 32 /* Static */) !== 0) && member.initializer) {
+                        properties.push(member);
+                    }
+                }
+                return properties;
+            }
+            function emitPropertyDeclarations(node, properties) {
+                for (var _a = 0, properties_6 = properties; _a < properties_6.length; _a++) {
+                    var property = properties_6[_a];
+                    emitPropertyDeclaration(node, property);
+                }
+            }
+            function emitPropertyDeclaration(node, property, receiver, isExpression) {
+                writeLine();
+                emitLeadingComments(property);
+                emitStart(property);
+                emitStart(property.name);
+                if (receiver) {
+                    emit(receiver);
+                }
+                else {
+                    if (property.flags & 32 /* Static */) {
+                        emitDeclarationName(node);
+                    }
+                    else {
+                        write("this");
+                    }
+                }
+                emitMemberAccessForPropertyName(property.name);
+                emitEnd(property.name);
+                write(" = ");
+                emit(property.initializer);
+                if (!isExpression) {
+                    write(";");
+                }
+                emitEnd(property);
+                emitTrailingComments(property);
+            }
+            function emitMemberFunctionsForES5AndLower(node) {
+                ts.forEach(node.members, function (member) {
+                    if (member.kind === 198 /* SemicolonClassElement */) {
+                        writeLine();
+                        write(";");
+                    }
+                    else if (member.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) {
+                        if (!member.body) {
+                            return emitCommentsOnNotEmittedNode(member);
+                        }
+                        writeLine();
+                        emitLeadingComments(member);
+                        emitStart(member);
+                        emitStart(member.name);
+                        emitClassMemberPrefix(node, member);
+                        emitMemberAccessForPropertyName(member.name);
+                        emitEnd(member.name);
+                        write(" = ");
+                        emitFunctionDeclaration(member);
+                        emitEnd(member);
+                        write(";");
+                        emitTrailingComments(member);
+                    }
+                    else if (member.kind === 149 /* GetAccessor */ || member.kind === 150 /* SetAccessor */) {
+                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
+                        if (member === accessors.firstAccessor) {
+                            writeLine();
+                            emitStart(member);
+                            write("Object.defineProperty(");
+                            emitStart(member.name);
+                            emitClassMemberPrefix(node, member);
+                            write(", ");
+                            emitExpressionForPropertyName(member.name);
+                            emitEnd(member.name);
+                            write(", {");
+                            increaseIndent();
+                            if (accessors.getAccessor) {
+                                writeLine();
+                                emitLeadingComments(accessors.getAccessor);
+                                write("get: ");
+                                emitStart(accessors.getAccessor);
+                                write("function ");
+                                emitSignatureAndBody(accessors.getAccessor);
+                                emitEnd(accessors.getAccessor);
+                                emitTrailingComments(accessors.getAccessor);
+                                write(",");
+                            }
+                            if (accessors.setAccessor) {
+                                writeLine();
+                                emitLeadingComments(accessors.setAccessor);
+                                write("set: ");
+                                emitStart(accessors.setAccessor);
+                                write("function ");
+                                emitSignatureAndBody(accessors.setAccessor);
+                                emitEnd(accessors.setAccessor);
+                                emitTrailingComments(accessors.setAccessor);
+                                write(",");
+                            }
+                            writeLine();
+                            write("enumerable: true,");
+                            writeLine();
+                            write("configurable: true");
+                            decreaseIndent();
+                            writeLine();
+                            write("});");
+                            emitEnd(member);
+                        }
+                    }
+                });
+            }
+            function emitMemberFunctionsForES6AndHigher(node) {
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    if ((member.kind === 147 /* MethodDeclaration */ || node.kind === 146 /* MethodSignature */) && !member.body) {
+                        emitCommentsOnNotEmittedNode(member);
+                    }
+                    else if (member.kind === 147 /* MethodDeclaration */ ||
+                        member.kind === 149 /* GetAccessor */ ||
+                        member.kind === 150 /* SetAccessor */) {
+                        writeLine();
+                        emitLeadingComments(member);
+                        emitStart(member);
+                        if (member.flags & 32 /* Static */) {
+                            write("static ");
+                        }
+                        if (member.kind === 149 /* GetAccessor */) {
+                            write("get ");
+                        }
+                        else if (member.kind === 150 /* SetAccessor */) {
+                            write("set ");
+                        }
+                        if (member.asteriskToken) {
+                            write("*");
+                        }
+                        emit(member.name);
+                        emitSignatureAndBody(member);
+                        emitEnd(member);
+                        emitTrailingComments(member);
+                    }
+                    else if (member.kind === 198 /* SemicolonClassElement */) {
+                        writeLine();
+                        write(";");
+                    }
+                }
+            }
+            function emitConstructor(node, baseTypeElement) {
+                var saveConvertedLoopState = convertedLoopState;
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                emitConstructorWorker(node, baseTypeElement);
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+            }
+            function emitConstructorWorker(node, baseTypeElement) {
+                // Check if we have property assignment inside class declaration.
+                // If there is property assignment, we need to emit constructor whether users define it or not
+                // If there is no property assignment, we can omit constructor if users do not define it
+                var hasInstancePropertyWithInitializer = false;
+                // Emit the constructor overload pinned comments
+                ts.forEach(node.members, function (member) {
+                    if (member.kind === 148 /* Constructor */ && !member.body) {
+                        emitCommentsOnNotEmittedNode(member);
+                    }
+                    // Check if there is any non-static property assignment
+                    if (member.kind === 145 /* PropertyDeclaration */ && member.initializer && (member.flags & 32 /* Static */) === 0) {
+                        hasInstancePropertyWithInitializer = true;
+                    }
+                });
+                var ctor = ts.getFirstConstructorWithBody(node);
+                // For target ES6 and above, if there is no user-defined constructor and there is no property assignment
+                // do not emit constructor in class declaration.
+                if (languageVersion >= 2 /* ES6 */ && !ctor && !hasInstancePropertyWithInitializer) {
+                    return;
+                }
+                if (ctor) {
+                    emitLeadingComments(ctor);
+                }
+                emitStart(ctor || node);
+                if (languageVersion < 2 /* ES6 */) {
+                    write("function ");
+                    emitDeclarationName(node);
+                    emitSignatureParameters(ctor);
+                }
+                else {
+                    write("constructor");
+                    if (ctor) {
+                        emitSignatureParameters(ctor);
+                    }
+                    else {
+                        // Based on EcmaScript6 section 14.5.14: Runtime Semantics: ClassDefinitionEvaluation.
+                        // If constructor is empty, then,
+                        //      If ClassHeritageopt is present, then
+                        //          Let constructor be the result of parsing the String "constructor(... args){ super (...args);}" using the syntactic grammar with the goal symbol MethodDefinition.
+                        //      Else,
+                        //          Let constructor be the result of parsing the String "constructor( ){ }" using the syntactic grammar with the goal symbol MethodDefinition
+                        if (baseTypeElement) {
+                            write("(...args)");
+                        }
+                        else {
+                            write("()");
+                        }
+                    }
+                }
+                var startIndex = 0;
+                write(" {");
+                increaseIndent();
+                if (ctor) {
+                    // Emit all the directive prologues (like "use strict").  These have to come before
+                    // any other preamble code we write (like parameter initializers).
+                    startIndex = emitDirectivePrologues(ctor.body.statements, /*startWithNewLine*/ true);
+                    emitDetachedCommentsAndUpdateCommentsInfo(ctor.body.statements);
+                }
+                emitCaptureThisForNodeIfNecessary(node);
+                var superCall;
+                if (ctor) {
+                    emitDefaultValueAssignments(ctor);
+                    emitRestParameter(ctor);
+                    if (baseTypeElement) {
+                        superCall = getSuperCallAtGivenIndex(ctor, startIndex);
+                        if (superCall) {
+                            writeLine();
+                            emit(superCall);
+                        }
+                    }
+                    emitParameterPropertyAssignments(ctor);
+                }
+                else {
+                    if (baseTypeElement) {
+                        writeLine();
+                        emitStart(baseTypeElement);
+                        if (languageVersion < 2 /* ES6 */) {
+                            write("_super.apply(this, arguments);");
+                        }
+                        else {
+                            write("super(...args);");
+                        }
+                        emitEnd(baseTypeElement);
+                    }
+                }
+                emitPropertyDeclarations(node, getInitializedProperties(node, /*isStatic*/ false));
+                if (ctor) {
+                    var statements = ctor.body.statements;
+                    if (superCall) {
+                        statements = statements.slice(1);
+                    }
+                    emitLinesStartingAt(statements, startIndex);
+                }
+                emitTempDeclarations(/*newLine*/ true);
+                writeLine();
+                if (ctor) {
+                    emitLeadingCommentsOfPosition(ctor.body.statements.end);
+                }
+                decreaseIndent();
+                emitToken(16 /* CloseBraceToken */, ctor ? ctor.body.statements.end : node.members.end);
+                emitEnd(ctor || node);
+                if (ctor) {
+                    emitTrailingComments(ctor);
+                }
+            }
+            function emitClassExpression(node) {
+                return emitClassLikeDeclaration(node);
+            }
+            function emitClassDeclaration(node) {
+                return emitClassLikeDeclaration(node);
+            }
+            function emitClassLikeDeclaration(node) {
+                if (languageVersion < 2 /* ES6 */) {
+                    emitClassLikeDeclarationBelowES6(node);
+                }
+                else {
+                    emitClassLikeDeclarationForES6AndHigher(node);
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile && node.name) {
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            function emitClassLikeDeclarationForES6AndHigher(node) {
+                var decoratedClassAlias;
+                var isHoistedDeclarationInSystemModule = shouldHoistDeclarationInSystemJsModule(node);
+                var isDecorated = ts.nodeIsDecorated(node);
+                var rewriteAsClassExpression = isDecorated || isHoistedDeclarationInSystemModule;
+                if (node.kind === 221 /* ClassDeclaration */) {
+                    if (rewriteAsClassExpression) {
+                        // When we emit an ES6 class that has a class decorator, we must tailor the
+                        // emit to certain specific cases.
+                        //
+                        // In the simplest case, we emit the class declaration as a let declaration, and
+                        // evaluate decorators after the close of the class body:
+                        //
+                        //  TypeScript                      | Javascript
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | let C = class C {
+                        //  class C {                       | }
+                        //  }                               | C = __decorate([dec], C);
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | export let C = class C {
+                        //  export class C {                | }
+                        //  }                               | C = __decorate([dec], C);
+                        //  ---------------------------------------------------------------------
+                        //  [Example 1]
+                        //
+                        // If a class declaration contains a reference to itself *inside* of the class body,
+                        // this introduces two bindings to the class: One outside of the class body, and one
+                        // inside of the class body. If we apply decorators as in [Example 1] above, there
+                        // is the possibility that the decorator `dec` will return a new value for the
+                        // constructor, which would result in the binding inside of the class no longer
+                        // pointing to the same reference as the binding outside of the class.
+                        //
+                        // As a result, we must instead rewrite all references to the class *inside* of the
+                        // class body to instead point to a local temporary alias for the class:
+                        //
+                        //  TypeScript                      | Javascript
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | let C_1 = class C {
+                        //  class C {                       |   static x() { return C_1.y; }
+                        //    static x() { return C.y; }    | }
+                        //    static y = 1;                 | let C = C_1;
+                        //  }                               | C.y = 1;
+                        //                                  | C = C_1 = __decorate([dec], C);
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | let C_1 = class C {
+                        //  export class C {                |   static x() { return C_1.y; }
+                        //    static x() { return C.y; }    | }
+                        //    static y = 1;                 | export let C = C_1;
+                        //  }                               | C.y = 1;
+                        //                                  | C = C_1 = __decorate([dec], C);
+                        //  ---------------------------------------------------------------------
+                        //  [Example 2]
+                        //
+                        // If a class declaration is the default export of a module, we instead emit
+                        // the export after the decorated declaration:
+                        //
+                        //  TypeScript                      | Javascript
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | let default_1 = class {
+                        //  export default class {          | }
+                        //  }                               | default_1 = __decorate([dec], default_1);
+                        //                                  | export default default_1;
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | let C = class C {
+                        //  export default class {          | }
+                        //  }                               | C = __decorate([dec], C);
+                        //                                  | export default C;
+                        //  ---------------------------------------------------------------------
+                        //  [Example 3]
+                        //
+                        // If the class declaration is the default export and a reference to itself
+                        // inside of the class body, we must emit both an alias for the class *and*
+                        // move the export after the declaration:
+                        //
+                        //  TypeScript                      | Javascript
+                        //  --------------------------------|------------------------------------
+                        //  @dec                            | let C_1 = class C {
+                        //  export default class C {        |   static x() { return C_1.y; }
+                        //    static x() { return C.y; }    | };
+                        //    static y = 1;                 | let C = C_1;
+                        //  }                               | C.y = 1;
+                        //                                  | C = C_1 = __decorate([dec], C);
+                        //                                  | export default C;
+                        //  ---------------------------------------------------------------------
+                        //  [Example 4]
+                        //
+                        // NOTE: we reuse the same rewriting logic for cases when targeting ES6 and module kind is System.
+                        // Because of hoisting top level class declaration need to be emitted as class expressions.
+                        // Double bind case is only required if node is decorated.
+                        if (isDecorated && resolver.getNodeCheckFlags(node) & 524288 /* ClassWithBodyScopedClassBinding */) {
+                            decoratedClassAlias = ts.unescapeIdentifier(makeUniqueName(node.name ? node.name.text : "default"));
+                            decoratedClassAliases[ts.getNodeId(node)] = decoratedClassAlias;
+                        }
+                        if (isES6ExportedDeclaration(node) && !(node.flags & 512 /* Default */) && decoratedClassAlias === undefined) {
+                            write("export ");
+                        }
+                        if (!isHoistedDeclarationInSystemModule) {
+                            write("let ");
+                        }
+                        if (decoratedClassAlias !== undefined) {
+                            write("" + decoratedClassAlias);
+                        }
+                        else {
+                            emitDeclarationName(node);
+                        }
+                        write(" = ");
+                    }
+                    else if (isES6ExportedDeclaration(node)) {
+                        write("export ");
+                        if (node.flags & 512 /* Default */) {
+                            write("default ");
+                        }
+                    }
+                }
+                // If the class has static properties, and it's a class expression, then we'll need
+                // to specialize the emit a bit.  for a class expression of the form:
+                //
+                //      class C { static a = 1; static b = 2; ... }
+                //
+                // We'll emit:
+                //
+                //      (_temp = class C { ... }, _temp.a = 1, _temp.b = 2, _temp)
+                //
+                // This keeps the expression as an expression, while ensuring that the static parts
+                // of it have been initialized by the time it is used.
+                var staticProperties = getInitializedProperties(node, /*isStatic*/ true);
+                var isClassExpressionWithStaticProperties = staticProperties.length > 0 && node.kind === 192 /* ClassExpression */;
+                var tempVariable;
+                if (isClassExpressionWithStaticProperties) {
+                    tempVariable = createAndRecordTempVariable(0 /* Auto */);
+                    write("(");
+                    increaseIndent();
+                    emit(tempVariable);
+                    write(" = ");
+                }
+                write("class");
+                // emit name if
+                // - node has a name
+                // - this is default export with static initializers
+                if (node.name || (node.flags & 512 /* Default */ && (staticProperties.length > 0 || modulekind !== ts.ModuleKind.ES6) && !rewriteAsClassExpression)) {
+                    write(" ");
+                    emitDeclarationName(node);
+                }
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+                if (baseTypeNode) {
+                    write(" extends ");
+                    emit(baseTypeNode.expression);
+                }
+                write(" {");
+                increaseIndent();
+                writeLine();
+                emitConstructor(node, baseTypeNode);
+                emitMemberFunctionsForES6AndHigher(node);
+                decreaseIndent();
+                writeLine();
+                emitToken(16 /* CloseBraceToken */, node.members.end);
+                if (rewriteAsClassExpression) {
+                    if (decoratedClassAlias !== undefined) {
+                        write(";");
+                        writeLine();
+                        if (isES6ExportedDeclaration(node) && !(node.flags & 512 /* Default */)) {
+                            write("export ");
+                        }
+                        write("let ");
+                        emitDeclarationName(node);
+                        write(" = " + decoratedClassAlias);
+                    }
+                    decoratedClassAliases[ts.getNodeId(node)] = undefined;
+                    write(";");
+                }
+                // Emit static property assignment. Because classDeclaration is lexically evaluated,
+                // it is safe to emit static property assignment after classDeclaration
+                // From ES6 specification:
+                //      HasLexicalDeclaration (N) : Determines if the argument identifier has a binding in this environment record that was created using
+                //                                  a lexical declaration such as a LexicalDeclaration or a ClassDeclaration.
+                if (isClassExpressionWithStaticProperties) {
+                    for (var _a = 0, staticProperties_1 = staticProperties; _a < staticProperties_1.length; _a++) {
+                        var property = staticProperties_1[_a];
+                        write(",");
+                        writeLine();
+                        emitPropertyDeclaration(node, property, /*receiver*/ tempVariable, /*isExpression*/ true);
+                    }
+                    write(",");
+                    writeLine();
+                    emit(tempVariable);
+                    decreaseIndent();
+                    write(")");
+                }
+                else {
+                    writeLine();
+                    emitPropertyDeclarations(node, staticProperties);
+                    emitDecoratorsOfClass(node, decoratedClassAlias);
+                }
+                if (!(node.flags & 1 /* Export */)) {
+                    return;
+                }
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    emitExportMemberAssignment(node);
+                }
+                else {
+                    // If this is an exported class, but not on the top level (i.e. on an internal
+                    // module), export it
+                    if (node.flags & 512 /* Default */) {
+                        // if this is a top level default export of decorated class, write the export after the declaration.
+                        if (isDecorated) {
+                            writeLine();
+                            write("export default ");
+                            emitDeclarationName(node);
+                            write(";");
+                        }
+                    }
+                    else if (node.parent.kind !== 256 /* SourceFile */) {
+                        writeLine();
+                        emitStart(node);
+                        emitModuleMemberName(node);
+                        write(" = ");
+                        emitDeclarationName(node);
+                        emitEnd(node);
+                        write(";");
+                    }
+                }
+            }
+            function emitClassLikeDeclarationBelowES6(node) {
+                if (node.kind === 221 /* ClassDeclaration */) {
+                    // source file level classes in system modules are hoisted so 'var's for them are already defined
+                    if (!shouldHoistDeclarationInSystemJsModule(node)) {
+                        write("var ");
+                    }
+                    emitDeclarationName(node);
+                    write(" = ");
+                }
+                write("(function (");
+                var baseTypeNode = ts.getClassExtendsHeritageClauseElement(node);
+                if (baseTypeNode) {
+                    write("_super");
+                }
+                write(") {");
+                var saveTempFlags = tempFlags;
+                var saveTempVariables = tempVariables;
+                var saveTempParameters = tempParameters;
+                var saveComputedPropertyNamesToGeneratedNames = computedPropertyNamesToGeneratedNames;
+                var saveConvertedLoopState = convertedLoopState;
+                convertedLoopState = undefined;
+                tempFlags = 0;
+                tempVariables = undefined;
+                tempParameters = undefined;
+                computedPropertyNamesToGeneratedNames = undefined;
+                increaseIndent();
+                if (baseTypeNode) {
+                    writeLine();
+                    emitStart(baseTypeNode);
+                    write("__extends(");
+                    emitDeclarationName(node);
+                    write(", _super);");
+                    emitEnd(baseTypeNode);
+                }
+                writeLine();
+                emitConstructor(node, baseTypeNode);
+                emitMemberFunctionsForES5AndLower(node);
+                emitPropertyDeclarations(node, getInitializedProperties(node, /*isStatic*/ true));
+                writeLine();
+                emitDecoratorsOfClass(node, /*decoratedClassAlias*/ undefined);
+                writeLine();
+                emitToken(16 /* CloseBraceToken */, node.members.end, function () {
+                    write("return ");
+                    emitDeclarationName(node);
+                });
+                write(";");
+                emitTempDeclarations(/*newLine*/ true);
+                ts.Debug.assert(convertedLoopState === undefined);
+                convertedLoopState = saveConvertedLoopState;
+                tempFlags = saveTempFlags;
+                tempVariables = saveTempVariables;
+                tempParameters = saveTempParameters;
+                computedPropertyNamesToGeneratedNames = saveComputedPropertyNamesToGeneratedNames;
+                decreaseIndent();
+                writeLine();
+                emitToken(16 /* CloseBraceToken */, node.members.end);
+                emitStart(node);
+                write("(");
+                if (baseTypeNode) {
+                    emit(baseTypeNode.expression);
+                }
+                write("))");
+                if (node.kind === 221 /* ClassDeclaration */) {
+                    write(";");
+                }
+                emitEnd(node);
+                if (node.kind === 221 /* ClassDeclaration */) {
+                    emitExportMemberAssignment(node);
+                }
+            }
+            function emitClassMemberPrefix(node, member) {
+                emitDeclarationName(node);
+                if (!(member.flags & 32 /* Static */)) {
+                    write(".prototype");
+                }
+            }
+            function emitDecoratorsOfClass(node, decoratedClassAlias) {
+                emitDecoratorsOfMembers(node, /*staticFlag*/ 0);
+                emitDecoratorsOfMembers(node, 32 /* Static */);
+                emitDecoratorsOfConstructor(node, decoratedClassAlias);
+            }
+            function emitDecoratorsOfConstructor(node, decoratedClassAlias) {
+                var decorators = node.decorators;
+                var constructor = ts.getFirstConstructorWithBody(node);
+                var firstParameterDecorator = constructor && ts.forEach(constructor.parameters, function (parameter) { return parameter.decorators; });
+                // skip decoration of the constructor if neither it nor its parameters are decorated
+                if (!decorators && !firstParameterDecorator) {
+                    return;
+                }
+                // Emit the call to __decorate. Given the class:
+                //
+                //   @dec
+                //   class C {
+                //   }
+                //
+                // The emit for the class is:
+                //
+                //   C = __decorate([dec], C);
+                //
+                writeLine();
+                emitStart(node.decorators || firstParameterDecorator);
+                emitDeclarationName(node);
+                if (decoratedClassAlias !== undefined) {
+                    write(" = " + decoratedClassAlias);
+                }
+                write(" = __decorate([");
+                increaseIndent();
+                writeLine();
+                var decoratorCount = decorators ? decorators.length : 0;
+                var argumentsWritten = emitList(decorators, 0, decoratorCount, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ false, /*noTrailingNewLine*/ true, function (decorator) { return emit(decorator.expression); });
+                if (firstParameterDecorator) {
+                    argumentsWritten += emitDecoratorsOfParameters(constructor, /*leadingComma*/ argumentsWritten > 0);
+                }
+                emitSerializedTypeMetadata(node, /*leadingComma*/ argumentsWritten >= 0);
+                decreaseIndent();
+                writeLine();
+                write("], ");
+                emitDeclarationName(node);
+                write(")");
+                emitEnd(node.decorators || firstParameterDecorator);
+                write(";");
+                writeLine();
+            }
+            function emitDecoratorsOfMembers(node, staticFlag) {
+                for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                    var member = _b[_a];
+                    // only emit members in the correct group
+                    if ((member.flags & 32 /* Static */) !== staticFlag) {
+                        continue;
+                    }
+                    // skip members that cannot be decorated (such as the constructor)
+                    if (!ts.nodeCanBeDecorated(member)) {
+                        continue;
+                    }
+                    // skip an accessor declaration if it is not the first accessor
+                    var decorators = void 0;
+                    var functionLikeMember = void 0;
+                    if (ts.isAccessor(member)) {
+                        var accessors = ts.getAllAccessorDeclarations(node.members, member);
+                        if (member !== accessors.firstAccessor) {
+                            continue;
+                        }
+                        // get the decorators from the first accessor with decorators
+                        decorators = accessors.firstAccessor.decorators;
+                        if (!decorators && accessors.secondAccessor) {
+                            decorators = accessors.secondAccessor.decorators;
+                        }
+                        // we only decorate parameters of the set accessor
+                        functionLikeMember = accessors.setAccessor;
+                    }
+                    else {
+                        decorators = member.decorators;
+                        // we only decorate the parameters here if this is a method
+                        if (member.kind === 147 /* MethodDeclaration */) {
+                            functionLikeMember = member;
+                        }
+                    }
+                    var firstParameterDecorator = functionLikeMember && ts.forEach(functionLikeMember.parameters, function (parameter) { return parameter.decorators; });
+                    // skip a member if it or any of its parameters are not decorated
+                    if (!decorators && !firstParameterDecorator) {
+                        continue;
+                    }
+                    // Emit the call to __decorate. Given the following:
+                    //
+                    //   class C {
+                    //     @dec method(@dec2 x) {}
+                    //     @dec get accessor() {}
+                    //     @dec prop;
+                    //   }
+                    //
+                    // The emit for a method is:
+                    //
+                    //   __decorate([
+                    //       dec,
+                    //       __param(0, dec2),
+                    //       __metadata("design:type", Function),
+                    //       __metadata("design:paramtypes", [Object]),
+                    //       __metadata("design:returntype", void 0)
+                    //   ], C.prototype, "method", undefined);
+                    //
+                    // The emit for an accessor is:
+                    //
+                    //   __decorate([
+                    //       dec
+                    //   ], C.prototype, "accessor", undefined);
+                    //
+                    // The emit for a property is:
+                    //
+                    //   __decorate([
+                    //       dec
+                    //   ], C.prototype, "prop");
+                    //
+                    writeLine();
+                    emitStart(decorators || firstParameterDecorator);
+                    write("__decorate([");
+                    increaseIndent();
+                    writeLine();
+                    var decoratorCount = decorators ? decorators.length : 0;
+                    var argumentsWritten = emitList(decorators, 0, decoratorCount, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ false, /*noTrailingNewLine*/ true, function (decorator) { return emit(decorator.expression); });
+                    if (firstParameterDecorator) {
+                        argumentsWritten += emitDecoratorsOfParameters(functionLikeMember, argumentsWritten > 0);
+                    }
+                    emitSerializedTypeMetadata(member, argumentsWritten > 0);
+                    decreaseIndent();
+                    writeLine();
+                    write("], ");
+                    emitClassMemberPrefix(node, member);
+                    write(", ");
+                    emitExpressionForPropertyName(member.name);
+                    if (languageVersion > 0 /* ES3 */) {
+                        if (member.kind !== 145 /* PropertyDeclaration */) {
+                            // We emit `null` here to indicate to `__decorate` that it can invoke `Object.getOwnPropertyDescriptor` directly.
+                            // We have this extra argument here so that we can inject an explicit property descriptor at a later date.
+                            write(", null");
+                        }
+                        else {
+                            // We emit `void 0` here to indicate to `__decorate` that it can invoke `Object.defineProperty` directly, but that it
+                            // should not invoke `Object.getOwnPropertyDescriptor`.
+                            write(", void 0");
+                        }
+                    }
+                    write(")");
+                    emitEnd(decorators || firstParameterDecorator);
+                    write(";");
+                    writeLine();
+                }
+            }
+            function emitDecoratorsOfParameters(node, leadingComma) {
+                var argumentsWritten = 0;
+                if (node) {
+                    var parameterIndex_1 = 0;
+                    for (var _a = 0, _b = node.parameters; _a < _b.length; _a++) {
+                        var parameter = _b[_a];
+                        if (ts.nodeIsDecorated(parameter)) {
+                            var decorators = parameter.decorators;
+                            argumentsWritten += emitList(decorators, 0, decorators.length, /*multiLine*/ true, /*trailingComma*/ false, /*leadingComma*/ leadingComma, /*noTrailingNewLine*/ true, function (decorator) {
+                                write("__param(" + parameterIndex_1 + ", ");
+                                emit(decorator.expression);
+                                write(")");
+                            });
+                            leadingComma = true;
+                        }
+                        parameterIndex_1++;
+                    }
+                }
+                return argumentsWritten;
+            }
+            function shouldEmitTypeMetadata(node) {
+                // This method determines whether to emit the "design:type" metadata based on the node's kind.
+                // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata
+                // compiler option is set.
+                switch (node.kind) {
+                    case 147 /* MethodDeclaration */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 145 /* PropertyDeclaration */:
+                        return true;
+                }
+                return false;
+            }
+            function shouldEmitReturnTypeMetadata(node) {
+                // This method determines whether to emit the "design:returntype" metadata based on the node's kind.
+                // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata
+                // compiler option is set.
+                switch (node.kind) {
+                    case 147 /* MethodDeclaration */:
+                        return true;
+                }
+                return false;
+            }
+            function shouldEmitParamTypesMetadata(node) {
+                // This method determines whether to emit the "design:paramtypes" metadata based on the node's kind.
+                // The caller should have already tested whether the node has decorators and whether the emitDecoratorMetadata
+                // compiler option is set.
+                switch (node.kind) {
+                    case 221 /* ClassDeclaration */:
+                    case 147 /* MethodDeclaration */:
+                    case 150 /* SetAccessor */:
+                        return true;
+                }
+                return false;
+            }
+            /** Serializes the type of a declaration to an appropriate JS constructor value. Used by the __metadata decorator for a class member. */
+            function emitSerializedTypeOfNode(node) {
+                // serialization of the type of a declaration uses the following rules:
+                //
+                // * The serialized type of a ClassDeclaration is "Function"
+                // * The serialized type of a ParameterDeclaration is the serialized type of its type annotation.
+                // * The serialized type of a PropertyDeclaration is the serialized type of its type annotation.
+                // * The serialized type of an AccessorDeclaration is the serialized type of the return type annotation of its getter or parameter type annotation of its setter.
+                // * The serialized type of any other FunctionLikeDeclaration is "Function".
+                // * The serialized type of any other node is "void 0".
+                //
+                // For rules on serializing type annotations, see `serializeTypeNode`.
+                switch (node.kind) {
+                    case 221 /* ClassDeclaration */:
+                        write("Function");
+                        return;
+                    case 145 /* PropertyDeclaration */:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 142 /* Parameter */:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 149 /* GetAccessor */:
+                        emitSerializedTypeNode(node.type);
+                        return;
+                    case 150 /* SetAccessor */:
+                        emitSerializedTypeNode(ts.getSetAccessorTypeAnnotationNode(node));
+                        return;
+                }
+                if (ts.isFunctionLike(node)) {
+                    write("Function");
+                    return;
+                }
+                write("void 0");
+            }
+            function emitSerializedTypeNode(node) {
+                if (node) {
+                    switch (node.kind) {
+                        case 103 /* VoidKeyword */:
+                            write("void 0");
+                            return;
+                        case 164 /* ParenthesizedType */:
+                            emitSerializedTypeNode(node.type);
+                            return;
+                        case 156 /* FunctionType */:
+                        case 157 /* ConstructorType */:
+                            write("Function");
+                            return;
+                        case 160 /* ArrayType */:
+                        case 161 /* TupleType */:
+                            write("Array");
+                            return;
+                        case 154 /* TypePredicate */:
+                        case 120 /* BooleanKeyword */:
+                            write("Boolean");
+                            return;
+                        case 132 /* StringKeyword */:
+                        case 166 /* StringLiteralType */:
+                            write("String");
+                            return;
+                        case 130 /* NumberKeyword */:
+                            write("Number");
+                            return;
+                        case 133 /* SymbolKeyword */:
+                            write("Symbol");
+                            return;
+                        case 155 /* TypeReference */:
+                            emitSerializedTypeReferenceNode(node);
+                            return;
+                        case 158 /* TypeQuery */:
+                        case 159 /* TypeLiteral */:
+                        case 162 /* UnionType */:
+                        case 163 /* IntersectionType */:
+                        case 117 /* AnyKeyword */:
+                        case 165 /* ThisType */:
+                            break;
+                        default:
+                            ts.Debug.fail("Cannot serialize unexpected type node.");
+                            break;
+                    }
+                }
+                write("Object");
+            }
+            /** Serializes a TypeReferenceNode to an appropriate JS constructor value. Used by the __metadata decorator. */
+            function emitSerializedTypeReferenceNode(node) {
+                var location = node.parent;
+                while (ts.isDeclaration(location) || ts.isTypeNode(location)) {
+                    location = location.parent;
+                }
+                // Clone the type name and parent it to a location outside of the current declaration.
+                var typeName = ts.cloneEntityName(node.typeName, location);
+                var result = resolver.getTypeReferenceSerializationKind(typeName);
+                switch (result) {
+                    case ts.TypeReferenceSerializationKind.Unknown:
+                        var temp = createAndRecordTempVariable(0 /* Auto */);
+                        write("(typeof (");
+                        emitNodeWithoutSourceMap(temp);
+                        write(" = ");
+                        emitEntityNameAsExpression(typeName, /*useFallback*/ true);
+                        write(") === 'function' && ");
+                        emitNodeWithoutSourceMap(temp);
+                        write(") || Object");
+                        break;
+                    case ts.TypeReferenceSerializationKind.TypeWithConstructSignatureAndValue:
+                        emitEntityNameAsExpression(typeName, /*useFallback*/ false);
+                        break;
+                    case ts.TypeReferenceSerializationKind.VoidType:
+                        write("void 0");
+                        break;
+                    case ts.TypeReferenceSerializationKind.BooleanType:
+                        write("Boolean");
+                        break;
+                    case ts.TypeReferenceSerializationKind.NumberLikeType:
+                        write("Number");
+                        break;
+                    case ts.TypeReferenceSerializationKind.StringLikeType:
+                        write("String");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ArrayLikeType:
+                        write("Array");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ESSymbolType:
+                        if (languageVersion < 2 /* ES6 */) {
+                            write("typeof Symbol === 'function' ? Symbol : Object");
+                        }
+                        else {
+                            write("Symbol");
+                        }
+                        break;
+                    case ts.TypeReferenceSerializationKind.TypeWithCallSignature:
+                        write("Function");
+                        break;
+                    case ts.TypeReferenceSerializationKind.ObjectType:
+                        write("Object");
+                        break;
+                }
+            }
+            /** Serializes the parameter types of a function or the constructor of a class. Used by the __metadata decorator for a method or set accessor. */
+            function emitSerializedParameterTypesOfNode(node) {
+                // serialization of parameter types uses the following rules:
+                //
+                // * If the declaration is a class, the parameters of the first constructor with a body are used.
+                // * If the declaration is function-like and has a body, the parameters of the function are used.
+                //
+                // For the rules on serializing the type of each parameter declaration, see `serializeTypeOfDeclaration`.
+                if (node) {
+                    var valueDeclaration = void 0;
+                    if (node.kind === 221 /* ClassDeclaration */) {
+                        valueDeclaration = ts.getFirstConstructorWithBody(node);
+                    }
+                    else if (ts.isFunctionLike(node) && ts.nodeIsPresent(node.body)) {
+                        valueDeclaration = node;
+                    }
+                    if (valueDeclaration) {
+                        var parameters = valueDeclaration.parameters;
+                        var parameterCount = parameters.length;
+                        if (parameterCount > 0) {
+                            for (var i = 0; i < parameterCount; i++) {
+                                if (i > 0) {
+                                    write(", ");
+                                }
+                                if (parameters[i].dotDotDotToken) {
+                                    var parameterType = parameters[i].type;
+                                    if (parameterType.kind === 160 /* ArrayType */) {
+                                        parameterType = parameterType.elementType;
+                                    }
+                                    else if (parameterType.kind === 155 /* TypeReference */ && parameterType.typeArguments && parameterType.typeArguments.length === 1) {
+                                        parameterType = parameterType.typeArguments[0];
+                                    }
+                                    else {
+                                        parameterType = undefined;
+                                    }
+                                    emitSerializedTypeNode(parameterType);
+                                }
+                                else {
+                                    emitSerializedTypeOfNode(parameters[i]);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+            /** Serializes the return type of function. Used by the __metadata decorator for a method. */
+            function emitSerializedReturnTypeOfNode(node) {
+                if (node && ts.isFunctionLike(node) && node.type) {
+                    emitSerializedTypeNode(node.type);
+                    return;
+                }
+                write("void 0");
+            }
+            function emitSerializedTypeMetadata(node, writeComma) {
+                // This method emits the serialized type metadata for a decorator target.
+                // The caller should have already tested whether the node has decorators.
+                var argumentsWritten = 0;
+                if (compilerOptions.emitDecoratorMetadata) {
+                    if (shouldEmitTypeMetadata(node)) {
+                        if (writeComma) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:type', ");
+                        emitSerializedTypeOfNode(node);
+                        write(")");
+                        argumentsWritten++;
+                    }
+                    if (shouldEmitParamTypesMetadata(node)) {
+                        if (writeComma || argumentsWritten) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:paramtypes', [");
+                        emitSerializedParameterTypesOfNode(node);
+                        write("])");
+                        argumentsWritten++;
+                    }
+                    if (shouldEmitReturnTypeMetadata(node)) {
+                        if (writeComma || argumentsWritten) {
+                            write(", ");
+                        }
+                        writeLine();
+                        write("__metadata('design:returntype', ");
+                        emitSerializedReturnTypeOfNode(node);
+                        write(")");
+                        argumentsWritten++;
+                    }
+                }
+                return argumentsWritten;
+            }
+            function emitInterfaceDeclaration(node) {
+                emitCommentsOnNotEmittedNode(node);
+            }
+            function shouldEmitEnumDeclaration(node) {
+                var isConstEnum = ts.isConst(node);
+                return !isConstEnum || compilerOptions.preserveConstEnums || compilerOptions.isolatedModules;
+            }
+            function emitEnumDeclaration(node) {
+                // const enums are completely erased during compilation.
+                if (!shouldEmitEnumDeclaration(node)) {
+                    return;
+                }
+                if (!shouldHoistDeclarationInSystemJsModule(node)) {
+                    // do not emit var if variable was already hoisted
+                    var isES6ExportedEnum = isES6ExportedDeclaration(node);
+                    if (!(node.flags & 1 /* Export */) || (isES6ExportedEnum && isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 224 /* EnumDeclaration */))) {
+                        emitStart(node);
+                        if (isES6ExportedEnum) {
+                            write("export ");
+                        }
+                        write("var ");
+                        emit(node.name);
+                        emitEnd(node);
+                        write(";");
+                    }
+                }
+                writeLine();
+                emitStart(node);
+                write("(function (");
+                emitStart(node.name);
+                write(getGeneratedNameForNode(node));
+                emitEnd(node.name);
+                write(") {");
+                increaseIndent();
+                emitLines(node.members);
+                decreaseIndent();
+                writeLine();
+                emitToken(16 /* CloseBraceToken */, node.members.end);
+                write(")(");
+                emitModuleMemberName(node);
+                write(" || (");
+                emitModuleMemberName(node);
+                write(" = {}));");
+                emitEnd(node);
+                if (!isES6ExportedDeclaration(node) && node.flags & 1 /* Export */ && !shouldHoistDeclarationInSystemJsModule(node)) {
+                    // do not emit var if variable was already hoisted
+                    writeLine();
+                    emitStart(node);
+                    write("var ");
+                    emit(node.name);
+                    write(" = ");
+                    emitModuleMemberName(node);
+                    emitEnd(node);
+                    write(";");
+                }
+                if (modulekind !== ts.ModuleKind.ES6 && node.parent === currentSourceFile) {
+                    if (modulekind === ts.ModuleKind.System && (node.flags & 1 /* Export */)) {
+                        // write the call to exporter for enum
+                        writeLine();
+                        write(exportFunctionForFile + "(\"");
+                        emitDeclarationName(node);
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(");");
+                    }
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            function emitEnumMember(node) {
+                var enumParent = node.parent;
+                emitStart(node);
+                write(getGeneratedNameForNode(enumParent));
+                write("[");
+                write(getGeneratedNameForNode(enumParent));
+                write("[");
+                emitExpressionForPropertyName(node.name);
+                write("] = ");
+                writeEnumMemberDeclarationValue(node);
+                write("] = ");
+                emitExpressionForPropertyName(node.name);
+                emitEnd(node);
+                write(";");
+            }
+            function writeEnumMemberDeclarationValue(member) {
+                var value = resolver.getConstantValue(member);
+                if (value !== undefined) {
+                    write(value.toString());
+                    return;
+                }
+                else if (member.initializer) {
+                    emit(member.initializer);
+                }
+                else {
+                    write("undefined");
+                }
+            }
+            function getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration) {
+                if (moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) {
+                    var recursiveInnerModule = getInnerMostModuleDeclarationFromDottedModule(moduleDeclaration.body);
+                    return recursiveInnerModule || moduleDeclaration.body;
+                }
+            }
+            function shouldEmitModuleDeclaration(node) {
+                return ts.isInstantiatedModule(node, compilerOptions.preserveConstEnums || compilerOptions.isolatedModules);
+            }
+            function isModuleMergedWithES6Class(node) {
+                return languageVersion === 2 /* ES6 */ && !!(resolver.getNodeCheckFlags(node) & 32768 /* LexicalModuleMergesWithClass */);
+            }
+            function isFirstDeclarationOfKind(node, declarations, kind) {
+                return !ts.forEach(declarations, function (declaration) { return declaration.kind === kind && declaration.pos < node.pos; });
+            }
+            function emitModuleDeclaration(node) {
+                // Emit only if this module is non-ambient.
+                var shouldEmit = shouldEmitModuleDeclaration(node);
+                if (!shouldEmit) {
+                    return emitCommentsOnNotEmittedNode(node);
+                }
+                var hoistedInDeclarationScope = shouldHoistDeclarationInSystemJsModule(node);
+                var emitVarForModule = !hoistedInDeclarationScope && !isModuleMergedWithES6Class(node);
+                if (emitVarForModule) {
+                    var isES6ExportedNamespace = isES6ExportedDeclaration(node);
+                    if (!isES6ExportedNamespace || isFirstDeclarationOfKind(node, node.symbol && node.symbol.declarations, 225 /* ModuleDeclaration */)) {
+                        emitStart(node);
+                        if (isES6ExportedNamespace) {
+                            write("export ");
+                        }
+                        write("var ");
+                        emit(node.name);
+                        write(";");
+                        emitEnd(node);
+                        writeLine();
+                    }
+                }
+                emitStart(node);
+                write("(function (");
+                emitStart(node.name);
+                write(getGeneratedNameForNode(node));
+                emitEnd(node.name);
+                write(") ");
+                if (node.body.kind === 226 /* ModuleBlock */) {
+                    var saveConvertedLoopState = convertedLoopState;
+                    var saveTempFlags = tempFlags;
+                    var saveTempVariables = tempVariables;
+                    convertedLoopState = undefined;
+                    tempFlags = 0;
+                    tempVariables = undefined;
+                    emit(node.body);
+                    ts.Debug.assert(convertedLoopState === undefined);
+                    convertedLoopState = saveConvertedLoopState;
+                    tempFlags = saveTempFlags;
+                    tempVariables = saveTempVariables;
+                }
+                else {
+                    write("{");
+                    increaseIndent();
+                    emitCaptureThisForNodeIfNecessary(node);
+                    writeLine();
+                    emit(node.body);
+                    decreaseIndent();
+                    writeLine();
+                    var moduleBlock = getInnerMostModuleDeclarationFromDottedModule(node).body;
+                    emitToken(16 /* CloseBraceToken */, moduleBlock.statements.end);
+                }
+                write(")(");
+                // write moduleDecl = containingModule.m only if it is not exported es6 module member
+                if ((node.flags & 1 /* Export */) && !isES6ExportedDeclaration(node)) {
+                    emit(node.name);
+                    write(" = ");
+                }
+                emitModuleMemberName(node);
+                write(" || (");
+                emitModuleMemberName(node);
+                write(" = {}));");
+                emitEnd(node);
+                if (!isES6ExportedDeclaration(node) && node.name.kind === 69 /* Identifier */ && node.parent === currentSourceFile) {
+                    if (modulekind === ts.ModuleKind.System && (node.flags & 1 /* Export */)) {
+                        writeLine();
+                        write(exportFunctionForFile + "(\"");
+                        emitDeclarationName(node);
+                        write("\", ");
+                        emitDeclarationName(node);
+                        write(");");
+                    }
+                    emitExportMemberAssignments(node.name);
+                }
+            }
+            /*
+             * Some bundlers (SystemJS builder) sometimes want to rename dependencies.
+             * Here we check if alternative name was provided for a given moduleName and return it if possible.
+             */
+            function tryRenameExternalModule(moduleName) {
+                if (renamedDependencies && ts.hasProperty(renamedDependencies, moduleName.text)) {
+                    return "\"" + renamedDependencies[moduleName.text] + "\"";
+                }
+                return undefined;
+            }
+            function emitRequire(moduleName) {
+                if (moduleName.kind === 9 /* StringLiteral */) {
+                    write("require(");
+                    var text = tryRenameExternalModule(moduleName);
+                    if (text) {
+                        write(text);
+                    }
+                    else {
+                        emitStart(moduleName);
+                        emitLiteral(moduleName);
+                        emitEnd(moduleName);
+                    }
+                    emitToken(18 /* CloseParenToken */, moduleName.end);
+                }
+                else {
+                    write("require()");
+                }
+            }
+            function getNamespaceDeclarationNode(node) {
+                if (node.kind === 229 /* ImportEqualsDeclaration */) {
+                    return node;
+                }
+                var importClause = node.importClause;
+                if (importClause && importClause.namedBindings && importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                    return importClause.namedBindings;
+                }
+            }
+            function isDefaultImport(node) {
+                return node.kind === 230 /* ImportDeclaration */ && node.importClause && !!node.importClause.name;
+            }
+            function emitExportImportAssignments(node) {
+                if (ts.isAliasSymbolDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
+                    emitExportMemberAssignments(node.name);
+                }
+                ts.forEachChild(node, emitExportImportAssignments);
+            }
+            function emitImportDeclaration(node) {
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    return emitExternalImportDeclaration(node);
+                }
+                // ES6 import
+                if (node.importClause) {
+                    var shouldEmitDefaultBindings = resolver.isReferencedAliasDeclaration(node.importClause);
+                    var shouldEmitNamedBindings = node.importClause.namedBindings && resolver.isReferencedAliasDeclaration(node.importClause.namedBindings, /* checkChildren */ true);
+                    if (shouldEmitDefaultBindings || shouldEmitNamedBindings) {
+                        write("import ");
+                        emitStart(node.importClause);
+                        if (shouldEmitDefaultBindings) {
+                            emit(node.importClause.name);
+                            if (shouldEmitNamedBindings) {
+                                write(", ");
+                            }
+                        }
+                        if (shouldEmitNamedBindings) {
+                            emitLeadingComments(node.importClause.namedBindings);
+                            emitStart(node.importClause.namedBindings);
+                            if (node.importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                                write("* as ");
+                                emit(node.importClause.namedBindings.name);
+                            }
+                            else {
+                                write("{ ");
+                                emitExportOrImportSpecifierList(node.importClause.namedBindings.elements, resolver.isReferencedAliasDeclaration);
+                                write(" }");
+                            }
+                            emitEnd(node.importClause.namedBindings);
+                            emitTrailingComments(node.importClause.namedBindings);
+                        }
+                        emitEnd(node.importClause);
+                        write(" from ");
+                        emit(node.moduleSpecifier);
+                        write(";");
+                    }
+                }
+                else {
+                    write("import ");
+                    emit(node.moduleSpecifier);
+                    write(";");
+                }
+            }
+            function emitExternalImportDeclaration(node) {
+                if (ts.contains(externalImports, node)) {
+                    var isExportedImport = node.kind === 229 /* ImportEqualsDeclaration */ && (node.flags & 1 /* Export */) !== 0;
+                    var namespaceDeclaration = getNamespaceDeclarationNode(node);
+                    var varOrConst = (languageVersion <= 1 /* ES5 */) ? "var " : "const ";
+                    if (modulekind !== ts.ModuleKind.AMD) {
+                        emitLeadingComments(node);
+                        emitStart(node);
+                        if (namespaceDeclaration && !isDefaultImport(node)) {
+                            // import x = require("foo")
+                            // import * as x from "foo"
+                            if (!isExportedImport) {
+                                write(varOrConst);
+                            }
+                            ;
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                        }
+                        else {
+                            // import "foo"
+                            // import x from "foo"
+                            // import { x, y } from "foo"
+                            // import d, * as x from "foo"
+                            // import d, { x, y } from "foo"
+                            var isNakedImport = 230 /* ImportDeclaration */ && !node.importClause;
+                            if (!isNakedImport) {
+                                write(varOrConst);
+                                write(getGeneratedNameForNode(node));
+                                write(" = ");
+                            }
+                        }
+                        emitRequire(ts.getExternalModuleName(node));
+                        if (namespaceDeclaration && isDefaultImport(node)) {
+                            // import d, * as x from "foo"
+                            write(", ");
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            write(getGeneratedNameForNode(node));
+                        }
+                        write(";");
+                        emitEnd(node);
+                        emitExportImportAssignments(node);
+                        emitTrailingComments(node);
+                    }
+                    else {
+                        if (isExportedImport) {
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            emit(namespaceDeclaration.name);
+                            write(";");
+                        }
+                        else if (namespaceDeclaration && isDefaultImport(node)) {
+                            // import d, * as x from "foo"
+                            write(varOrConst);
+                            emitModuleMemberName(namespaceDeclaration);
+                            write(" = ");
+                            write(getGeneratedNameForNode(node));
+                            write(";");
+                        }
+                        emitExportImportAssignments(node);
+                    }
+                }
+            }
+            function emitImportEqualsDeclaration(node) {
+                if (ts.isExternalModuleImportEqualsDeclaration(node)) {
+                    emitExternalImportDeclaration(node);
+                    return;
+                }
+                // preserve old compiler's behavior: emit 'var' for import declaration (even if we do not consider them referenced) when
+                // - current file is not external module
+                // - import declaration is top level and target is value imported by entity name
+                if (resolver.isReferencedAliasDeclaration(node) ||
+                    (!isCurrentFileExternalModule && resolver.isTopLevelValueImportEqualsWithEntityName(node))) {
+                    emitLeadingComments(node);
+                    emitStart(node);
+                    // variable declaration for import-equals declaration can be hoisted in system modules
+                    // in this case 'var' should be omitted and emit should contain only initialization
+                    var variableDeclarationIsHoisted = shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ true);
+                    // is it top level export import v = a.b.c in system module?
+                    // if yes - it needs to be rewritten as exporter('v', v = a.b.c)
+                    var isExported = isSourceFileLevelDeclarationInSystemJsModule(node, /*isExported*/ true);
+                    if (!variableDeclarationIsHoisted) {
+                        ts.Debug.assert(!isExported);
+                        if (isES6ExportedDeclaration(node)) {
+                            write("export ");
+                            write("var ");
+                        }
+                        else if (!(node.flags & 1 /* Export */)) {
+                            write("var ");
+                        }
+                    }
+                    if (isExported) {
+                        write(exportFunctionForFile + "(\"");
+                        emitNodeWithoutSourceMap(node.name);
+                        write("\", ");
+                    }
+                    emitModuleMemberName(node);
+                    write(" = ");
+                    emit(node.moduleReference);
+                    if (isExported) {
+                        write(")");
+                    }
+                    write(";");
+                    emitEnd(node);
+                    emitExportImportAssignments(node);
+                    emitTrailingComments(node);
+                }
+            }
+            function emitExportDeclaration(node) {
+                ts.Debug.assert(modulekind !== ts.ModuleKind.System);
+                if (modulekind !== ts.ModuleKind.ES6) {
+                    if (node.moduleSpecifier && (!node.exportClause || resolver.isValueAliasDeclaration(node))) {
+                        emitStart(node);
+                        var generatedName = getGeneratedNameForNode(node);
+                        if (node.exportClause) {
+                            // export { x, y, ... } from "foo"
+                            if (modulekind !== ts.ModuleKind.AMD) {
+                                write("var ");
+                                write(generatedName);
+                                write(" = ");
+                                emitRequire(ts.getExternalModuleName(node));
+                                write(";");
+                            }
+                            for (var _a = 0, _b = node.exportClause.elements; _a < _b.length; _a++) {
+                                var specifier = _b[_a];
+                                if (resolver.isValueAliasDeclaration(specifier)) {
+                                    writeLine();
+                                    emitStart(specifier);
+                                    emitContainingModuleName(specifier);
+                                    write(".");
+                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.name);
+                                    write(" = ");
+                                    write(generatedName);
+                                    write(".");
+                                    emitNodeWithCommentsAndWithoutSourcemap(specifier.propertyName || specifier.name);
+                                    write(";");
+                                    emitEnd(specifier);
+                                }
+                            }
+                        }
+                        else {
+                            // export * from "foo"
+                            if (hasExportStarsToExportValues && resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
+                                writeLine();
+                                write("__export(");
+                                if (modulekind !== ts.ModuleKind.AMD) {
+                                    emitRequire(ts.getExternalModuleName(node));
+                                }
+                                else {
+                                    write(generatedName);
+                                }
+                                write(");");
+                            }
+                        }
+                        emitEnd(node);
+                    }
+                }
+                else {
+                    if (!node.exportClause || resolver.isValueAliasDeclaration(node)) {
+                        write("export ");
+                        if (node.exportClause) {
+                            // export { x, y, ... }
+                            write("{ ");
+                            emitExportOrImportSpecifierList(node.exportClause.elements, resolver.isValueAliasDeclaration);
+                            write(" }");
+                        }
+                        else {
+                            write("*");
+                        }
+                        if (node.moduleSpecifier) {
+                            write(" from ");
+                            emit(node.moduleSpecifier);
+                        }
+                        write(";");
+                    }
+                }
+            }
+            function emitExportOrImportSpecifierList(specifiers, shouldEmit) {
+                ts.Debug.assert(modulekind === ts.ModuleKind.ES6);
+                var needsComma = false;
+                for (var _a = 0, specifiers_1 = specifiers; _a < specifiers_1.length; _a++) {
+                    var specifier = specifiers_1[_a];
+                    if (shouldEmit(specifier)) {
+                        if (needsComma) {
+                            write(", ");
+                        }
+                        if (specifier.propertyName) {
+                            emit(specifier.propertyName);
+                            write(" as ");
+                        }
+                        emit(specifier.name);
+                        needsComma = true;
+                    }
+                }
+            }
+            function emitExportAssignment(node) {
+                if (!node.isExportEquals && resolver.isValueAliasDeclaration(node)) {
+                    if (modulekind === ts.ModuleKind.ES6) {
+                        writeLine();
+                        emitStart(node);
+                        write("export default ");
+                        var expression = node.expression;
+                        emit(expression);
+                        if (expression.kind !== 220 /* FunctionDeclaration */ &&
+                            expression.kind !== 221 /* ClassDeclaration */) {
+                            write(";");
+                        }
+                        emitEnd(node);
+                    }
+                    else {
+                        writeLine();
+                        emitStart(node);
+                        if (modulekind === ts.ModuleKind.System) {
+                            write(exportFunctionForFile + "(\"default\",");
+                            emit(node.expression);
+                            write(")");
+                        }
+                        else {
+                            emitEs6ExportDefaultCompat(node);
+                            emitContainingModuleName(node);
+                            if (languageVersion === 0 /* ES3 */) {
+                                write('["default"] = ');
+                            }
+                            else {
+                                write(".default = ");
+                            }
+                            emit(node.expression);
+                        }
+                        write(";");
+                        emitEnd(node);
+                    }
+                }
+            }
+            function collectExternalModuleInfo(sourceFile) {
+                externalImports = [];
+                exportSpecifiers = {};
+                exportEquals = undefined;
+                hasExportStarsToExportValues = false;
+                for (var _a = 0, _b = sourceFile.statements; _a < _b.length; _a++) {
+                    var node = _b[_a];
+                    switch (node.kind) {
+                        case 230 /* ImportDeclaration */:
+                            if (!node.importClause ||
+                                resolver.isReferencedAliasDeclaration(node.importClause, /*checkChildren*/ true)) {
+                                // import "mod"
+                                // import x from "mod" where x is referenced
+                                // import * as x from "mod" where x is referenced
+                                // import { x, y } from "mod" where at least one import is referenced
+                                externalImports.push(node);
+                            }
+                            break;
+                        case 229 /* ImportEqualsDeclaration */:
+                            if (node.moduleReference.kind === 240 /* ExternalModuleReference */ && resolver.isReferencedAliasDeclaration(node)) {
+                                // import x = require("mod") where x is referenced
+                                externalImports.push(node);
+                            }
+                            break;
+                        case 236 /* ExportDeclaration */:
+                            if (node.moduleSpecifier) {
+                                if (!node.exportClause) {
+                                    // export * from "mod"
+                                    if (resolver.moduleExportsSomeValue(node.moduleSpecifier)) {
+                                        externalImports.push(node);
+                                        hasExportStarsToExportValues = true;
+                                    }
+                                }
+                                else if (resolver.isValueAliasDeclaration(node)) {
+                                    // export { x, y } from "mod" where at least one export is a value symbol
+                                    externalImports.push(node);
+                                }
+                            }
+                            else {
+                                // export { x, y }
+                                for (var _c = 0, _d = node.exportClause.elements; _c < _d.length; _c++) {
+                                    var specifier = _d[_c];
+                                    var name_30 = (specifier.propertyName || specifier.name).text;
+                                    (exportSpecifiers[name_30] || (exportSpecifiers[name_30] = [])).push(specifier);
+                                }
+                            }
+                            break;
+                        case 235 /* ExportAssignment */:
+                            if (node.isExportEquals && !exportEquals) {
+                                // export = x
+                                exportEquals = node;
+                            }
+                            break;
+                    }
+                }
+            }
+            function emitExportStarHelper() {
+                if (hasExportStarsToExportValues) {
+                    writeLine();
+                    write("function __export(m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("for (var p in m) if (!exports.hasOwnProperty(p)) exports[p] = m[p];");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                }
+            }
+            function getLocalNameForExternalImport(node) {
+                var namespaceDeclaration = getNamespaceDeclarationNode(node);
+                if (namespaceDeclaration && !isDefaultImport(node)) {
+                    return ts.getTextOfNodeFromSourceText(currentText, namespaceDeclaration.name);
+                }
+                if (node.kind === 230 /* ImportDeclaration */ && node.importClause) {
+                    return getGeneratedNameForNode(node);
+                }
+                if (node.kind === 236 /* ExportDeclaration */ && node.moduleSpecifier) {
+                    return getGeneratedNameForNode(node);
+                }
+            }
+            function getExternalModuleNameText(importNode, emitRelativePathAsModuleName) {
+                if (emitRelativePathAsModuleName) {
+                    var name_31 = getExternalModuleNameFromDeclaration(host, resolver, importNode);
+                    if (name_31) {
+                        return "\"" + name_31 + "\"";
+                    }
+                }
+                var moduleName = ts.getExternalModuleName(importNode);
+                if (moduleName.kind === 9 /* StringLiteral */) {
+                    return tryRenameExternalModule(moduleName) || getLiteralText(moduleName);
+                }
+                return undefined;
+            }
+            function emitVariableDeclarationsForImports() {
+                if (externalImports.length === 0) {
+                    return;
+                }
+                writeLine();
+                var started = false;
+                for (var _a = 0, externalImports_1 = externalImports; _a < externalImports_1.length; _a++) {
+                    var importNode = externalImports_1[_a];
+                    // do not create variable declaration for exports and imports that lack import clause
+                    var skipNode = importNode.kind === 236 /* ExportDeclaration */ ||
+                        (importNode.kind === 230 /* ImportDeclaration */ && !importNode.importClause);
+                    if (skipNode) {
+                        continue;
+                    }
+                    if (!started) {
+                        write("var ");
+                        started = true;
+                    }
+                    else {
+                        write(", ");
+                    }
+                    write(getLocalNameForExternalImport(importNode));
+                }
+                if (started) {
+                    write(";");
+                }
+            }
+            function emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations) {
+                // when resolving exports local exported entries/indirect exported entries in the module
+                // should always win over entries with similar names that were added via star exports
+                // to support this we store names of local/indirect exported entries in a set.
+                // this set is used to filter names brought by star exports.
+                if (!hasExportStarsToExportValues) {
+                    // local names set is needed only in presence of star exports
+                    return undefined;
+                }
+                // local names set should only be added if we have anything exported
+                if (!exportedDeclarations && ts.isEmpty(exportSpecifiers)) {
+                    // no exported declarations (export var ...) or export specifiers (export {x})
+                    // check if we have any non star export declarations.
+                    var hasExportDeclarationWithExportClause = false;
+                    for (var _a = 0, externalImports_2 = externalImports; _a < externalImports_2.length; _a++) {
+                        var externalImport = externalImports_2[_a];
+                        if (externalImport.kind === 236 /* ExportDeclaration */ && externalImport.exportClause) {
+                            hasExportDeclarationWithExportClause = true;
+                            break;
+                        }
+                    }
+                    if (!hasExportDeclarationWithExportClause) {
+                        // we still need to emit exportStar helper
+                        return emitExportStarFunction(/*localNames*/ undefined);
+                    }
+                }
+                var exportedNamesStorageRef = makeUniqueName("exportedNames");
+                writeLine();
+                write("var " + exportedNamesStorageRef + " = {");
+                increaseIndent();
+                var started = false;
+                if (exportedDeclarations) {
+                    for (var i = 0; i < exportedDeclarations.length; i++) {
+                        // write name of exported declaration, i.e 'export var x...'
+                        writeExportedName(exportedDeclarations[i]);
+                    }
+                }
+                if (exportSpecifiers) {
+                    for (var n in exportSpecifiers) {
+                        for (var _b = 0, _c = exportSpecifiers[n]; _b < _c.length; _b++) {
+                            var specifier = _c[_b];
+                            // write name of export specified, i.e. 'export {x}'
+                            writeExportedName(specifier.name);
+                        }
+                    }
+                }
+                for (var _d = 0, externalImports_3 = externalImports; _d < externalImports_3.length; _d++) {
+                    var externalImport = externalImports_3[_d];
+                    if (externalImport.kind !== 236 /* ExportDeclaration */) {
+                        continue;
+                    }
+                    var exportDecl = externalImport;
+                    if (!exportDecl.exportClause) {
+                        // export * from ...
+                        continue;
+                    }
+                    for (var _e = 0, _f = exportDecl.exportClause.elements; _e < _f.length; _e++) {
+                        var element = _f[_e];
+                        // write name of indirectly exported entry, i.e. 'export {x} from ...'
+                        writeExportedName(element.name || element.propertyName);
+                    }
+                }
+                decreaseIndent();
+                writeLine();
+                write("};");
+                return emitExportStarFunction(exportedNamesStorageRef);
+                function emitExportStarFunction(localNames) {
+                    var exportStarFunction = makeUniqueName("exportStar");
+                    writeLine();
+                    // define an export star helper function
+                    write("function " + exportStarFunction + "(m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("var exports = {};");
+                    writeLine();
+                    write("for(var n in m) {");
+                    increaseIndent();
+                    writeLine();
+                    write("if (n !== \"default\"");
+                    if (localNames) {
+                        write("&& !" + localNames + ".hasOwnProperty(n)");
+                    }
+                    write(") exports[n] = m[n];");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                    writeLine();
+                    write(exportFunctionForFile + "(exports);");
+                    decreaseIndent();
+                    writeLine();
+                    write("}");
+                    return exportStarFunction;
+                }
+                function writeExportedName(node) {
+                    // do not record default exports
+                    // they are local to module and never overwritten (explicitly skipped) by star export
+                    if (node.kind !== 69 /* Identifier */ && node.flags & 512 /* Default */) {
+                        return;
+                    }
+                    if (started) {
+                        write(",");
+                    }
+                    else {
+                        started = true;
+                    }
+                    writeLine();
+                    write("'");
+                    if (node.kind === 69 /* Identifier */) {
+                        emitNodeWithCommentsAndWithoutSourcemap(node);
+                    }
+                    else {
+                        emitDeclarationName(node);
+                    }
+                    write("': true");
+                }
+            }
+            function processTopLevelVariableAndFunctionDeclarations(node) {
+                // per ES6 spec:
+                // 15.2.1.16.4 ModuleDeclarationInstantiation() Concrete Method
+                // - var declarations are initialized to undefined - 14.a.ii
+                // - function/generator declarations are instantiated - 16.a.iv
+                // this means that after module is instantiated but before its evaluation
+                // exported functions are already accessible at import sites
+                // in theory we should hoist only exported functions and its dependencies
+                // in practice to simplify things we'll hoist all source level functions and variable declaration
+                // including variables declarations for module and class declarations
+                var hoistedVars;
+                var hoistedFunctionDeclarations;
+                var exportedDeclarations;
+                visit(node);
+                if (hoistedVars) {
+                    writeLine();
+                    write("var ");
+                    var seen = {};
+                    for (var i = 0; i < hoistedVars.length; i++) {
+                        var local = hoistedVars[i];
+                        var name_32 = local.kind === 69 /* Identifier */
+                            ? local
+                            : local.name;
+                        if (name_32) {
+                            // do not emit duplicate entries (in case of declaration merging) in the list of hoisted variables
+                            var text = ts.unescapeIdentifier(name_32.text);
+                            if (ts.hasProperty(seen, text)) {
+                                continue;
+                            }
+                            else {
+                                seen[text] = text;
+                            }
+                        }
+                        if (i !== 0) {
+                            write(", ");
+                        }
+                        if (local.kind === 221 /* ClassDeclaration */ || local.kind === 225 /* ModuleDeclaration */ || local.kind === 224 /* EnumDeclaration */) {
+                            emitDeclarationName(local);
+                        }
+                        else {
+                            emit(local);
+                        }
+                        var flags = ts.getCombinedNodeFlags(local.kind === 69 /* Identifier */ ? local.parent : local);
+                        if (flags & 1 /* Export */) {
+                            if (!exportedDeclarations) {
+                                exportedDeclarations = [];
+                            }
+                            exportedDeclarations.push(local);
+                        }
+                    }
+                    write(";");
+                }
+                if (hoistedFunctionDeclarations) {
+                    for (var _a = 0, hoistedFunctionDeclarations_1 = hoistedFunctionDeclarations; _a < hoistedFunctionDeclarations_1.length; _a++) {
+                        var f = hoistedFunctionDeclarations_1[_a];
+                        writeLine();
+                        emit(f);
+                        if (f.flags & 1 /* Export */) {
+                            if (!exportedDeclarations) {
+                                exportedDeclarations = [];
+                            }
+                            exportedDeclarations.push(f);
+                        }
+                    }
+                }
+                return exportedDeclarations;
+                function visit(node) {
+                    if (node.flags & 2 /* Ambient */) {
+                        return;
+                    }
+                    if (node.kind === 220 /* FunctionDeclaration */) {
+                        if (!hoistedFunctionDeclarations) {
+                            hoistedFunctionDeclarations = [];
+                        }
+                        hoistedFunctionDeclarations.push(node);
+                        return;
+                    }
+                    if (node.kind === 221 /* ClassDeclaration */) {
+                        if (!hoistedVars) {
+                            hoistedVars = [];
+                        }
+                        hoistedVars.push(node);
+                        return;
+                    }
+                    if (node.kind === 224 /* EnumDeclaration */) {
+                        if (shouldEmitEnumDeclaration(node)) {
+                            if (!hoistedVars) {
+                                hoistedVars = [];
+                            }
+                            hoistedVars.push(node);
+                        }
+                        return;
+                    }
+                    if (node.kind === 225 /* ModuleDeclaration */) {
+                        if (shouldEmitModuleDeclaration(node)) {
+                            if (!hoistedVars) {
+                                hoistedVars = [];
+                            }
+                            hoistedVars.push(node);
+                        }
+                        return;
+                    }
+                    if (node.kind === 218 /* VariableDeclaration */ || node.kind === 169 /* BindingElement */) {
+                        if (shouldHoistVariable(node, /*checkIfSourceFileLevelDecl*/ false)) {
+                            var name_33 = node.name;
+                            if (name_33.kind === 69 /* Identifier */) {
+                                if (!hoistedVars) {
+                                    hoistedVars = [];
+                                }
+                                hoistedVars.push(name_33);
+                            }
+                            else {
+                                ts.forEachChild(name_33, visit);
+                            }
+                        }
+                        return;
+                    }
+                    if (ts.isInternalModuleImportEqualsDeclaration(node) && resolver.isValueAliasDeclaration(node)) {
+                        if (!hoistedVars) {
+                            hoistedVars = [];
+                        }
+                        hoistedVars.push(node.name);
+                        return;
+                    }
+                    if (ts.isBindingPattern(node)) {
+                        ts.forEach(node.elements, visit);
+                        return;
+                    }
+                    if (!ts.isDeclaration(node)) {
+                        ts.forEachChild(node, visit);
+                    }
+                }
+            }
+            function shouldHoistVariable(node, checkIfSourceFileLevelDecl) {
+                if (checkIfSourceFileLevelDecl && !shouldHoistDeclarationInSystemJsModule(node)) {
+                    return false;
+                }
+                // hoist variable if
+                // - it is not block scoped
+                // - it is top level block scoped
+                // if block scoped variables are nested in some another block then
+                // no other functions can use them except ones that are defined at least in the same block
+                return (ts.getCombinedNodeFlags(node) & 3072 /* BlockScoped */) === 0 ||
+                    ts.getEnclosingBlockScopeContainer(node).kind === 256 /* SourceFile */;
+            }
+            function isCurrentFileSystemExternalModule() {
+                return modulekind === ts.ModuleKind.System && isCurrentFileExternalModule;
+            }
+            function emitSystemModuleBody(node, dependencyGroups, startIndex) {
+                // shape of the body in system modules:
+                // function (exports) {
+                //     <list of local aliases for imports>
+                //     <hoisted function declarations>
+                //     <hoisted variable declarations>
+                //     return {
+                //         setters: [
+                //             <list of setter function for imports>
+                //         ],
+                //         execute: function() {
+                //             <module statements>
+                //         }
+                //     }
+                //     <temp declarations>
+                // }
+                // I.e:
+                // import {x} from 'file1'
+                // var y = 1;
+                // export function foo() { return y + x(); }
+                // console.log(y);
+                // will be transformed to
+                // function(exports) {
+                //     var file1; // local alias
+                //     var y;
+                //     function foo() { return y + file1.x(); }
+                //     exports("foo", foo);
+                //     return {
+                //         setters: [
+                //             function(v) { file1 = v }
+                //         ],
+                //         execute(): function() {
+                //             y = 1;
+                //             console.log(y);
+                //         }
+                //     };
+                // }
+                emitVariableDeclarationsForImports();
+                writeLine();
+                var exportedDeclarations = processTopLevelVariableAndFunctionDeclarations(node);
+                var exportStarFunction = emitLocalStorageForExportedNamesIfNecessary(exportedDeclarations);
+                writeLine();
+                write("return {");
+                increaseIndent();
+                writeLine();
+                emitSetters(exportStarFunction, dependencyGroups);
+                writeLine();
+                emitExecute(node, startIndex);
+                decreaseIndent();
+                writeLine();
+                write("}"); // return
+                emitTempDeclarations(/*newLine*/ true);
+            }
+            function emitSetters(exportStarFunction, dependencyGroups) {
+                write("setters:[");
+                for (var i = 0; i < dependencyGroups.length; i++) {
+                    if (i !== 0) {
+                        write(",");
+                    }
+                    writeLine();
+                    increaseIndent();
+                    var group = dependencyGroups[i];
+                    // derive a unique name for parameter from the first named entry in the group
+                    var parameterName = makeUniqueName(ts.forEach(group, getLocalNameForExternalImport) || "");
+                    write("function (" + parameterName + ") {");
+                    increaseIndent();
+                    for (var _a = 0, group_1 = group; _a < group_1.length; _a++) {
+                        var entry = group_1[_a];
+                        var importVariableName = getLocalNameForExternalImport(entry) || "";
+                        switch (entry.kind) {
+                            case 230 /* ImportDeclaration */:
+                                if (!entry.importClause) {
+                                    // 'import "..."' case
+                                    // module is imported only for side-effects, no emit required
+                                    break;
+                                }
+                            // fall-through
+                            case 229 /* ImportEqualsDeclaration */:
+                                ts.Debug.assert(importVariableName !== "");
+                                writeLine();
+                                // save import into the local
+                                write(importVariableName + " = " + parameterName + ";");
+                                writeLine();
+                                break;
+                            case 236 /* ExportDeclaration */:
+                                ts.Debug.assert(importVariableName !== "");
+                                if (entry.exportClause) {
+                                    // export {a, b as c} from 'foo'
+                                    // emit as:
+                                    // exports_({
+                                    //    "a": _["a"],
+                                    //    "c": _["b"]
+                                    // });
+                                    writeLine();
+                                    write(exportFunctionForFile + "({");
+                                    writeLine();
+                                    increaseIndent();
+                                    for (var i_1 = 0, len = entry.exportClause.elements.length; i_1 < len; i_1++) {
+                                        if (i_1 !== 0) {
+                                            write(",");
+                                            writeLine();
+                                        }
+                                        var e = entry.exportClause.elements[i_1];
+                                        write("\"");
+                                        emitNodeWithCommentsAndWithoutSourcemap(e.name);
+                                        write("\": " + parameterName + "[\"");
+                                        emitNodeWithCommentsAndWithoutSourcemap(e.propertyName || e.name);
+                                        write("\"]");
+                                    }
+                                    decreaseIndent();
+                                    writeLine();
+                                    write("});");
+                                }
+                                else {
+                                    // collectExternalModuleInfo prefilters star exports to keep only ones that export values
+                                    // this means that check 'resolver.moduleExportsSomeValue' is redundant and can be omitted here
+                                    writeLine();
+                                    // export * from 'foo'
+                                    // emit as:
+                                    // exportStar(_foo);
+                                    write(exportStarFunction + "(" + parameterName + ");");
+                                }
+                                writeLine();
+                                break;
+                        }
+                    }
+                    decreaseIndent();
+                    write("}");
+                    decreaseIndent();
+                }
+                write("],");
+            }
+            function emitExecute(node, startIndex) {
+                write("execute: function() {");
+                increaseIndent();
+                writeLine();
+                for (var i = startIndex; i < node.statements.length; i++) {
+                    var statement = node.statements[i];
+                    switch (statement.kind) {
+                        // - function declarations are not emitted because they were already hoisted
+                        // - import declarations are not emitted since they are already handled in setters
+                        // - export declarations with module specifiers are not emitted since they were already written in setters
+                        // - export declarations without module specifiers are emitted preserving the order
+                        case 220 /* FunctionDeclaration */:
+                        case 230 /* ImportDeclaration */:
+                            continue;
+                        case 236 /* ExportDeclaration */:
+                            if (!statement.moduleSpecifier) {
+                                for (var _a = 0, _b = statement.exportClause.elements; _a < _b.length; _a++) {
+                                    var element = _b[_a];
+                                    // write call to exporter function for every export specifier in exports list
+                                    emitExportSpecifierInSystemModule(element);
+                                }
+                            }
+                            continue;
+                        case 229 /* ImportEqualsDeclaration */:
+                            if (!ts.isInternalModuleImportEqualsDeclaration(statement)) {
+                                // - import equals declarations that import external modules are not emitted
+                                continue;
+                            }
+                        // fall-though for import declarations that import internal modules
+                        default:
+                            writeLine();
+                            emit(statement);
+                    }
+                }
+                decreaseIndent();
+                writeLine();
+                write("}"); // execute
+            }
+            function writeModuleName(node, emitRelativePathAsModuleName) {
+                var moduleName = node.moduleName;
+                if (moduleName || (emitRelativePathAsModuleName && (moduleName = getResolvedExternalModuleName(host, node)))) {
+                    write("\"" + moduleName + "\", ");
+                }
+            }
+            function emitSystemModule(node, emitRelativePathAsModuleName) {
+                collectExternalModuleInfo(node);
+                // System modules has the following shape
+                // System.register(['dep-1', ... 'dep-n'], function(exports) {/* module body function */})
+                // 'exports' here is a function 'exports<T>(name: string, value: T): T' that is used to publish exported values.
+                // 'exports' returns its 'value' argument so in most cases expressions
+                // that mutate exported values can be rewritten as:
+                // expr -> exports('name', expr).
+                // The only exception in this rule is postfix unary operators,
+                // see comment to 'emitPostfixUnaryExpression' for more details
+                ts.Debug.assert(!exportFunctionForFile);
+                // make sure that  name of 'exports' function does not conflict with existing identifiers
+                exportFunctionForFile = makeUniqueName("exports");
+                contextObjectForFile = makeUniqueName("context");
+                writeLine();
+                write("System.register(");
+                writeModuleName(node, emitRelativePathAsModuleName);
+                write("[");
+                var groupIndices = {};
+                var dependencyGroups = [];
+                for (var i = 0; i < externalImports.length; i++) {
+                    var text = getExternalModuleNameText(externalImports[i], emitRelativePathAsModuleName);
+                    if (text === undefined) {
+                        continue;
+                    }
+                    // text should be quoted string
+                    // for deduplication purposes in key remove leading and trailing quotes so 'a' and "a" will be considered the same
+                    var key = text.substr(1, text.length - 2);
+                    if (ts.hasProperty(groupIndices, key)) {
+                        // deduplicate/group entries in dependency list by the dependency name
+                        var groupIndex = groupIndices[key];
+                        dependencyGroups[groupIndex].push(externalImports[i]);
+                        continue;
+                    }
+                    else {
+                        groupIndices[key] = dependencyGroups.length;
+                        dependencyGroups.push([externalImports[i]]);
+                    }
+                    if (i !== 0) {
+                        write(", ");
+                    }
+                    write(text);
+                }
+                write("], function(" + exportFunctionForFile + ", " + contextObjectForFile + ") {");
+                writeLine();
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
+                writeLine();
+                write("var __moduleName = " + contextObjectForFile + " && " + contextObjectForFile + ".id;");
+                writeLine();
+                emitEmitHelpers(node);
+                emitCaptureThisForNodeIfNecessary(node);
+                emitSystemModuleBody(node, dependencyGroups, startIndex);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
+                // names of modules with corresponding parameter in the factory function
+                var aliasedModuleNames = [];
+                // names of modules with no corresponding parameters in factory function
+                var unaliasedModuleNames = [];
+                var importAliasNames = []; // names of the parameters in the factory function; these
+                // parameters need to match the indexes of the corresponding
+                // module names in aliasedModuleNames.
+                // Fill in amd-dependency tags
+                for (var _a = 0, _b = node.amdDependencies; _a < _b.length; _a++) {
+                    var amdDependency = _b[_a];
+                    if (amdDependency.name) {
+                        aliasedModuleNames.push('"' + amdDependency.path + '"');
+                        importAliasNames.push(amdDependency.name);
+                    }
+                    else {
+                        unaliasedModuleNames.push('"' + amdDependency.path + '"');
+                    }
+                }
+                for (var _c = 0, externalImports_4 = externalImports; _c < externalImports_4.length; _c++) {
+                    var importNode = externalImports_4[_c];
+                    // Find the name of the external module
+                    var externalModuleName = getExternalModuleNameText(importNode, emitRelativePathAsModuleName);
+                    // Find the name of the module alias, if there is one
+                    var importAliasName = getLocalNameForExternalImport(importNode);
+                    if (includeNonAmdDependencies && importAliasName) {
+                        aliasedModuleNames.push(externalModuleName);
+                        importAliasNames.push(importAliasName);
+                    }
+                    else {
+                        unaliasedModuleNames.push(externalModuleName);
+                    }
+                }
+                return { aliasedModuleNames: aliasedModuleNames, unaliasedModuleNames: unaliasedModuleNames, importAliasNames: importAliasNames };
+            }
+            function emitAMDDependencies(node, includeNonAmdDependencies, emitRelativePathAsModuleName) {
+                // An AMD define function has the following shape:
+                //     define(id?, dependencies?, factory);
+                //
+                // This has the shape of
+                //     define(name, ["module1", "module2"], function (module1Alias) {
+                // The location of the alias in the parameter list in the factory function needs to
+                // match the position of the module name in the dependency list.
+                //
+                // To ensure this is true in cases of modules with no aliases, e.g.:
+                // `import "module"` or `<amd-dependency path= "a.css" />`
+                // we need to add modules without alias names to the end of the dependencies list
+                var dependencyNames = getAMDDependencyNames(node, includeNonAmdDependencies, emitRelativePathAsModuleName);
+                emitAMDDependencyList(dependencyNames);
+                write(", ");
+                emitAMDFactoryHeader(dependencyNames);
+            }
+            function emitAMDDependencyList(_a) {
+                var aliasedModuleNames = _a.aliasedModuleNames, unaliasedModuleNames = _a.unaliasedModuleNames;
+                write('["require", "exports"');
+                if (aliasedModuleNames.length) {
+                    write(", ");
+                    write(aliasedModuleNames.join(", "));
+                }
+                if (unaliasedModuleNames.length) {
+                    write(", ");
+                    write(unaliasedModuleNames.join(", "));
+                }
+                write("]");
+            }
+            function emitAMDFactoryHeader(_a) {
+                var importAliasNames = _a.importAliasNames;
+                write("function (require, exports");
+                if (importAliasNames.length) {
+                    write(", ");
+                    write(importAliasNames.join(", "));
+                }
+                write(") {");
+            }
+            function emitAMDModule(node, emitRelativePathAsModuleName) {
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                writeLine();
+                write("define(");
+                writeModuleName(node, emitRelativePathAsModuleName);
+                emitAMDDependencies(node, /*includeNonAmdDependencies*/ true, emitRelativePathAsModuleName);
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(/*emitAsReturn*/ true);
+                emitTempDeclarations(/*newLine*/ true);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function emitCommonJSModule(node) {
+                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(/*emitAsReturn*/ false);
+                emitTempDeclarations(/*newLine*/ true);
+            }
+            function emitUMDModule(node) {
+                emitEmitHelpers(node);
+                collectExternalModuleInfo(node);
+                var dependencyNames = getAMDDependencyNames(node, /*includeNonAmdDependencies*/ false);
+                // Module is detected first to support Browserify users that load into a browser with an AMD loader
+                writeLines("(function (factory) {\n    if (typeof module === 'object' && typeof module.exports === 'object') {\n        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n    }\n    else if (typeof define === 'function' && define.amd) {\n        define(");
+                emitAMDDependencyList(dependencyNames);
+                write(", factory);");
+                writeLines("    }\n})(");
+                emitAMDFactoryHeader(dependencyNames);
+                increaseIndent();
+                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ true, /*ensureUseStrict*/ !compilerOptions.noImplicitUseStrict);
+                emitExportStarHelper();
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitExportEquals(/*emitAsReturn*/ true);
+                emitTempDeclarations(/*newLine*/ true);
+                decreaseIndent();
+                writeLine();
+                write("});");
+            }
+            function emitES6Module(node) {
+                externalImports = undefined;
+                exportSpecifiers = undefined;
+                exportEquals = undefined;
+                hasExportStarsToExportValues = false;
+                var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false);
+                emitEmitHelpers(node);
+                emitCaptureThisForNodeIfNecessary(node);
+                emitLinesStartingAt(node.statements, startIndex);
+                emitTempDeclarations(/*newLine*/ true);
+                // Emit exportDefault if it exists will happen as part
+                // or normal statement emit.
+            }
+            function emitExportEquals(emitAsReturn) {
+                if (exportEquals && resolver.isValueAliasDeclaration(exportEquals)) {
+                    writeLine();
+                    emitStart(exportEquals);
+                    write(emitAsReturn ? "return " : "module.exports = ");
+                    emit(exportEquals.expression);
+                    write(";");
+                    emitEnd(exportEquals);
+                }
+            }
+            function emitJsxElement(node) {
+                switch (compilerOptions.jsx) {
+                    case 2 /* React */:
+                        jsxEmitReact(node);
+                        break;
+                    case 1 /* Preserve */:
+                    // Fall back to preserve if None was specified (we'll error earlier)
+                    default:
+                        jsxEmitPreserve(node);
+                        break;
+                }
+            }
+            function trimReactWhitespaceAndApplyEntities(node) {
+                var result = undefined;
+                var text = ts.getTextOfNode(node, /*includeTrivia*/ true);
+                var firstNonWhitespace = 0;
+                var lastNonWhitespace = -1;
+                // JSX trims whitespace at the end and beginning of lines, except that the
+                // start/end of a tag is considered a start/end of a line only if that line is
+                // on the same line as the closing tag. See examples in tests/cases/conformance/jsx/tsxReactEmitWhitespace.tsx
+                for (var i = 0; i < text.length; i++) {
+                    var c = text.charCodeAt(i);
+                    if (ts.isLineBreak(c)) {
+                        if (firstNonWhitespace !== -1 && (lastNonWhitespace - firstNonWhitespace + 1 > 0)) {
+                            var part = text.substr(firstNonWhitespace, lastNonWhitespace - firstNonWhitespace + 1);
+                            result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
+                        }
+                        firstNonWhitespace = -1;
+                    }
+                    else if (!ts.isWhiteSpace(c)) {
+                        lastNonWhitespace = i;
+                        if (firstNonWhitespace === -1) {
+                            firstNonWhitespace = i;
+                        }
+                    }
+                }
+                if (firstNonWhitespace !== -1) {
+                    var part = text.substr(firstNonWhitespace);
+                    result = (result ? result + "\" + ' ' + \"" : "") + ts.escapeString(part);
+                }
+                if (result) {
+                    // Replace entities like &nbsp;
+                    result = result.replace(/&(\w+);/g, function (s, m) {
+                        if (entities[m] !== undefined) {
+                            var ch = String.fromCharCode(entities[m]);
+                            // &quot; needs to be escaped
+                            return ch === '"' ? "\\\"" : ch;
+                        }
+                        else {
+                            return s;
+                        }
+                    });
+                }
+                return result;
+            }
+            function isJsxChildEmittable(child) {
+                if (child.kind === 248 /* JsxExpression */) {
+                    // Don't emit empty expressions
+                    return !!child.expression;
+                }
+                else if (child.kind === 244 /* JsxText */) {
+                    // Don't emit empty strings
+                    return !!getTextToEmit(child);
+                }
+                return true;
+            }
+            ;
+            function getTextToEmit(node) {
+                switch (compilerOptions.jsx) {
+                    case 2 /* React */:
+                        var text = trimReactWhitespaceAndApplyEntities(node);
+                        if (text === undefined || text.length === 0) {
+                            return undefined;
+                        }
+                        else {
+                            return text;
+                        }
+                    case 1 /* Preserve */:
+                    default:
+                        return ts.getTextOfNode(node, /*includeTrivia*/ true);
+                }
+            }
+            function emitJsxText(node) {
+                switch (compilerOptions.jsx) {
+                    case 2 /* React */:
+                        write('"');
+                        write(trimReactWhitespaceAndApplyEntities(node));
+                        write('"');
+                        break;
+                    case 1 /* Preserve */:
+                    default:
+                        writer.writeLiteral(ts.getTextOfNode(node, /*includeTrivia*/ true));
+                        break;
+                }
+            }
+            function emitJsxExpression(node) {
+                if (node.expression) {
+                    switch (compilerOptions.jsx) {
+                        case 1 /* Preserve */:
+                        default:
+                            write("{");
+                            emit(node.expression);
+                            write("}");
+                            break;
+                        case 2 /* React */:
+                            emit(node.expression);
+                            break;
+                    }
+                }
+            }
+            function isUseStrictPrologue(node) {
+                return node.expression.text === "use strict";
+            }
+            function ensureUseStrictPrologue(startWithNewLine, writeUseStrict) {
+                if (writeUseStrict) {
+                    if (startWithNewLine) {
+                        writeLine();
+                    }
+                    write("\"use strict\";");
+                }
+            }
+            function emitDirectivePrologues(statements, startWithNewLine, ensureUseStrict) {
+                var foundUseStrict = false;
+                for (var i = 0; i < statements.length; i++) {
+                    if (ts.isPrologueDirective(statements[i])) {
+                        if (isUseStrictPrologue(statements[i])) {
+                            foundUseStrict = true;
+                        }
+                        if (startWithNewLine || i > 0) {
+                            writeLine();
+                        }
+                        emit(statements[i]);
+                    }
+                    else {
+                        ensureUseStrictPrologue(startWithNewLine || i > 0, !foundUseStrict && ensureUseStrict);
+                        // return index of the first non prologue directive
+                        return i;
+                    }
+                }
+                ensureUseStrictPrologue(startWithNewLine, !foundUseStrict && ensureUseStrict);
+                return statements.length;
+            }
+            function writeLines(text) {
+                var lines = text.split(/\r\n|\r|\n/g);
+                for (var i = 0; i < lines.length; i++) {
+                    var line = lines[i];
+                    if (line.length) {
+                        writeLine();
+                        write(line);
+                    }
+                }
+            }
+            function emitEmitHelpers(node) {
+                // Only emit helpers if the user did not say otherwise.
+                if (!compilerOptions.noEmitHelpers) {
+                    // Only Emit __extends function when target ES5.
+                    // For target ES6 and above, we can emit classDeclaration as is.
+                    if (languageVersion < 2 /* ES6 */ && !extendsEmitted && node.flags & 262144 /* HasClassExtends */) {
+                        writeLines(extendsHelper);
+                        extendsEmitted = true;
+                    }
+                    if (compilerOptions.jsx !== 1 /* Preserve */ && !assignEmitted && (node.flags & 1073741824 /* HasJsxSpreadAttribute */)) {
+                        writeLines(assignHelper);
+                        assignEmitted = true;
+                    }
+                    if (!decorateEmitted && node.flags & 524288 /* HasDecorators */) {
+                        writeLines(decorateHelper);
+                        if (compilerOptions.emitDecoratorMetadata) {
+                            writeLines(metadataHelper);
+                        }
+                        decorateEmitted = true;
+                    }
+                    if (!paramEmitted && node.flags & 1048576 /* HasParamDecorators */) {
+                        writeLines(paramHelper);
+                        paramEmitted = true;
+                    }
+                    if (!awaiterEmitted && node.flags & 2097152 /* HasAsyncFunctions */) {
+                        writeLines(awaiterHelper);
+                        awaiterEmitted = true;
+                    }
+                }
+            }
+            function emitSourceFileNode(node) {
+                // Start new file on new line
+                writeLine();
+                emitShebang();
+                emitDetachedCommentsAndUpdateCommentsInfo(node);
+                if (ts.isExternalModule(node) || compilerOptions.isolatedModules) {
+                    if (isOwnFileEmit || (!ts.isExternalModule(node) && compilerOptions.isolatedModules)) {
+                        var emitModule = moduleEmitDelegates[modulekind] || moduleEmitDelegates[ts.ModuleKind.CommonJS];
+                        emitModule(node);
+                    }
+                    else {
+                        bundleEmitDelegates[modulekind](node, /*emitRelativePathAsModuleName*/ true);
+                    }
+                }
+                else {
+                    // emit prologue directives prior to __extends
+                    var startIndex = emitDirectivePrologues(node.statements, /*startWithNewLine*/ false);
+                    externalImports = undefined;
+                    exportSpecifiers = undefined;
+                    exportEquals = undefined;
+                    hasExportStarsToExportValues = false;
+                    emitEmitHelpers(node);
+                    emitCaptureThisForNodeIfNecessary(node);
+                    emitLinesStartingAt(node.statements, startIndex);
+                    emitTempDeclarations(/*newLine*/ true);
+                }
+                emitLeadingComments(node.endOfFileToken);
+            }
+            function emit(node) {
+                emitNodeConsideringCommentsOption(node, emitNodeWithSourceMap);
+            }
+            function emitNodeWithCommentsAndWithoutSourcemap(node) {
+                emitNodeConsideringCommentsOption(node, emitNodeWithoutSourceMap);
+            }
+            function emitNodeConsideringCommentsOption(node, emitNodeConsideringSourcemap) {
+                if (node) {
+                    if (node.flags & 2 /* Ambient */) {
+                        return emitCommentsOnNotEmittedNode(node);
+                    }
+                    if (isSpecializedCommentHandling(node)) {
+                        // This is the node that will handle its own comments and sourcemap
+                        return emitNodeWithoutSourceMap(node);
+                    }
+                    var emitComments_1 = shouldEmitLeadingAndTrailingComments(node);
+                    if (emitComments_1) {
+                        emitLeadingComments(node);
+                    }
+                    emitNodeConsideringSourcemap(node);
+                    if (emitComments_1) {
+                        emitTrailingComments(node);
+                    }
+                }
+            }
+            function emitNodeWithSourceMap(node) {
+                if (node) {
+                    emitStart(node);
+                    emitNodeWithoutSourceMap(node);
+                    emitEnd(node);
+                }
+            }
+            function emitNodeWithoutSourceMap(node) {
+                if (node) {
+                    emitJavaScriptWorker(node);
+                }
+            }
+            function changeSourceMapEmit(writer) {
+                sourceMap = writer;
+                emitStart = writer.emitStart;
+                emitEnd = writer.emitEnd;
+                emitPos = writer.emitPos;
+                setSourceFile = writer.setSourceFile;
+            }
+            function withTemporaryNoSourceMap(callback) {
+                var prevSourceMap = sourceMap;
+                setSourceMapWriterEmit(ts.getNullSourceMapWriter());
+                callback();
+                setSourceMapWriterEmit(prevSourceMap);
+            }
+            function isSpecializedCommentHandling(node) {
+                switch (node.kind) {
+                    // All of these entities are emitted in a specialized fashion.  As such, we allow
+                    // the specialized methods for each to handle the comments on the nodes.
+                    case 222 /* InterfaceDeclaration */:
+                    case 220 /* FunctionDeclaration */:
+                    case 230 /* ImportDeclaration */:
+                    case 229 /* ImportEqualsDeclaration */:
+                    case 223 /* TypeAliasDeclaration */:
+                    case 235 /* ExportAssignment */:
+                        return true;
+                }
+            }
+            function shouldEmitLeadingAndTrailingComments(node) {
+                switch (node.kind) {
+                    case 200 /* VariableStatement */:
+                        return shouldEmitLeadingAndTrailingCommentsForVariableStatement(node);
+                    case 225 /* ModuleDeclaration */:
+                        // Only emit the leading/trailing comments for a module if we're actually
+                        // emitting the module as well.
+                        return shouldEmitModuleDeclaration(node);
+                    case 224 /* EnumDeclaration */:
+                        // Only emit the leading/trailing comments for an enum if we're actually
+                        // emitting the module as well.
+                        return shouldEmitEnumDeclaration(node);
+                }
+                // If the node is emitted in specialized fashion, dont emit comments as this node will handle
+                // emitting comments when emitting itself
+                ts.Debug.assert(!isSpecializedCommentHandling(node));
+                // If this is the expression body of an arrow function that we're down-leveling,
+                // then we don't want to emit comments when we emit the body.  It will have already
+                // been taken care of when we emitted the 'return' statement for the function
+                // expression body.
+                if (node.kind !== 199 /* Block */ &&
+                    node.parent &&
+                    node.parent.kind === 180 /* ArrowFunction */ &&
+                    node.parent.body === node &&
+                    languageVersion <= 1 /* ES5 */) {
+                    return false;
+                }
+                // Emit comments for everything else.
+                return true;
+            }
+            function emitJavaScriptWorker(node) {
+                // Check if the node can be emitted regardless of the ScriptTarget
+                switch (node.kind) {
+                    case 69 /* Identifier */:
+                        return emitIdentifier(node);
+                    case 142 /* Parameter */:
+                        return emitParameter(node);
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        return emitMethod(node);
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        return emitAccessor(node);
+                    case 97 /* ThisKeyword */:
+                        return emitThis(node);
+                    case 95 /* SuperKeyword */:
+                        return emitSuper(node);
+                    case 93 /* NullKeyword */:
+                        return write("null");
+                    case 99 /* TrueKeyword */:
+                        return write("true");
+                    case 84 /* FalseKeyword */:
+                        return write("false");
+                    case 8 /* NumericLiteral */:
+                    case 9 /* StringLiteral */:
+                    case 10 /* RegularExpressionLiteral */:
+                    case 11 /* NoSubstitutionTemplateLiteral */:
+                    case 12 /* TemplateHead */:
+                    case 13 /* TemplateMiddle */:
+                    case 14 /* TemplateTail */:
+                        return emitLiteral(node);
+                    case 189 /* TemplateExpression */:
+                        return emitTemplateExpression(node);
+                    case 197 /* TemplateSpan */:
+                        return emitTemplateSpan(node);
+                    case 241 /* JsxElement */:
+                    case 242 /* JsxSelfClosingElement */:
+                        return emitJsxElement(node);
+                    case 244 /* JsxText */:
+                        return emitJsxText(node);
+                    case 248 /* JsxExpression */:
+                        return emitJsxExpression(node);
+                    case 139 /* QualifiedName */:
+                        return emitQualifiedName(node);
+                    case 167 /* ObjectBindingPattern */:
+                        return emitObjectBindingPattern(node);
+                    case 168 /* ArrayBindingPattern */:
+                        return emitArrayBindingPattern(node);
+                    case 169 /* BindingElement */:
+                        return emitBindingElement(node);
+                    case 170 /* ArrayLiteralExpression */:
+                        return emitArrayLiteral(node);
+                    case 171 /* ObjectLiteralExpression */:
+                        return emitObjectLiteral(node);
+                    case 253 /* PropertyAssignment */:
+                        return emitPropertyAssignment(node);
+                    case 254 /* ShorthandPropertyAssignment */:
+                        return emitShorthandPropertyAssignment(node);
+                    case 140 /* ComputedPropertyName */:
+                        return emitComputedPropertyName(node);
+                    case 172 /* PropertyAccessExpression */:
+                        return emitPropertyAccess(node);
+                    case 173 /* ElementAccessExpression */:
+                        return emitIndexedAccess(node);
+                    case 174 /* CallExpression */:
+                        return emitCallExpression(node);
+                    case 175 /* NewExpression */:
+                        return emitNewExpression(node);
+                    case 176 /* TaggedTemplateExpression */:
+                        return emitTaggedTemplateExpression(node);
+                    case 177 /* TypeAssertionExpression */:
+                    case 195 /* AsExpression */:
+                    case 196 /* NonNullExpression */:
+                        return emit(node.expression);
+                    case 178 /* ParenthesizedExpression */:
+                        return emitParenExpression(node);
+                    case 220 /* FunctionDeclaration */:
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                        return emitFunctionDeclaration(node);
+                    case 181 /* DeleteExpression */:
+                        return emitDeleteExpression(node);
+                    case 182 /* TypeOfExpression */:
+                        return emitTypeOfExpression(node);
+                    case 183 /* VoidExpression */:
+                        return emitVoidExpression(node);
+                    case 184 /* AwaitExpression */:
+                        return emitAwaitExpression(node);
+                    case 185 /* PrefixUnaryExpression */:
+                        return emitPrefixUnaryExpression(node);
+                    case 186 /* PostfixUnaryExpression */:
+                        return emitPostfixUnaryExpression(node);
+                    case 187 /* BinaryExpression */:
+                        return emitBinaryExpression(node);
+                    case 188 /* ConditionalExpression */:
+                        return emitConditionalExpression(node);
+                    case 191 /* SpreadElementExpression */:
+                        return emitSpreadElementExpression(node);
+                    case 190 /* YieldExpression */:
+                        return emitYieldExpression(node);
+                    case 193 /* OmittedExpression */:
+                        return;
+                    case 199 /* Block */:
+                    case 226 /* ModuleBlock */:
+                        return emitBlock(node);
+                    case 200 /* VariableStatement */:
+                        return emitVariableStatement(node);
+                    case 201 /* EmptyStatement */:
+                        return write(";");
+                    case 202 /* ExpressionStatement */:
+                        return emitExpressionStatement(node);
+                    case 203 /* IfStatement */:
+                        return emitIfStatement(node);
+                    case 204 /* DoStatement */:
+                        return emitDoStatement(node);
+                    case 205 /* WhileStatement */:
+                        return emitWhileStatement(node);
+                    case 206 /* ForStatement */:
+                        return emitForStatement(node);
+                    case 208 /* ForOfStatement */:
+                    case 207 /* ForInStatement */:
+                        return emitForInOrForOfStatement(node);
+                    case 209 /* ContinueStatement */:
+                    case 210 /* BreakStatement */:
+                        return emitBreakOrContinueStatement(node);
+                    case 211 /* ReturnStatement */:
+                        return emitReturnStatement(node);
+                    case 212 /* WithStatement */:
+                        return emitWithStatement(node);
+                    case 213 /* SwitchStatement */:
+                        return emitSwitchStatement(node);
+                    case 249 /* CaseClause */:
+                    case 250 /* DefaultClause */:
+                        return emitCaseOrDefaultClause(node);
+                    case 214 /* LabeledStatement */:
+                        return emitLabeledStatement(node);
+                    case 215 /* ThrowStatement */:
+                        return emitThrowStatement(node);
+                    case 216 /* TryStatement */:
+                        return emitTryStatement(node);
+                    case 252 /* CatchClause */:
+                        return emitCatchClause(node);
+                    case 217 /* DebuggerStatement */:
+                        return emitDebuggerStatement(node);
+                    case 218 /* VariableDeclaration */:
+                        return emitVariableDeclaration(node);
+                    case 192 /* ClassExpression */:
+                        return emitClassExpression(node);
+                    case 221 /* ClassDeclaration */:
+                        return emitClassDeclaration(node);
+                    case 222 /* InterfaceDeclaration */:
+                        return emitInterfaceDeclaration(node);
+                    case 224 /* EnumDeclaration */:
+                        return emitEnumDeclaration(node);
+                    case 255 /* EnumMember */:
+                        return emitEnumMember(node);
+                    case 225 /* ModuleDeclaration */:
+                        return emitModuleDeclaration(node);
+                    case 230 /* ImportDeclaration */:
+                        return emitImportDeclaration(node);
+                    case 229 /* ImportEqualsDeclaration */:
+                        return emitImportEqualsDeclaration(node);
+                    case 236 /* ExportDeclaration */:
+                        return emitExportDeclaration(node);
+                    case 235 /* ExportAssignment */:
+                        return emitExportAssignment(node);
+                    case 256 /* SourceFile */:
+                        return emitSourceFileNode(node);
+                }
+            }
+            function hasDetachedComments(pos) {
+                return detachedCommentsInfo !== undefined && ts.lastOrUndefined(detachedCommentsInfo).nodePos === pos;
+            }
+            function getLeadingCommentsWithoutDetachedComments() {
+                // get the leading comments from detachedPos
+                var leadingComments = ts.getLeadingCommentRanges(currentText, ts.lastOrUndefined(detachedCommentsInfo).detachedCommentEndPos);
+                if (detachedCommentsInfo.length - 1) {
+                    detachedCommentsInfo.pop();
+                }
+                else {
+                    detachedCommentsInfo = undefined;
+                }
+                return leadingComments;
+            }
+            /**
+             * Determine if the given comment is a triple-slash
+             *
+             * @return true if the comment is a triple-slash comment else false
+             **/
+            function isTripleSlashComment(comment) {
+                // Verify this is /// comment, but do the regexp match only when we first can find /// in the comment text
+                // so that we don't end up computing comment string and doing match for all // comments
+                if (currentText.charCodeAt(comment.pos + 1) === 47 /* slash */ &&
+                    comment.pos + 2 < comment.end &&
+                    currentText.charCodeAt(comment.pos + 2) === 47 /* slash */) {
+                    var textSubStr = currentText.substring(comment.pos, comment.end);
+                    return textSubStr.match(ts.fullTripleSlashReferencePathRegEx) ||
+                        textSubStr.match(ts.fullTripleSlashAMDReferencePathRegEx) ?
+                        true : false;
+                }
+                return false;
+            }
+            function getLeadingCommentsToEmit(node) {
+                // Emit the leading comments only if the parent's pos doesn't match because parent should take care of emitting these comments
+                if (node.parent) {
+                    if (node.parent.kind === 256 /* SourceFile */ || node.pos !== node.parent.pos) {
+                        if (hasDetachedComments(node.pos)) {
+                            // get comments without detached comments
+                            return getLeadingCommentsWithoutDetachedComments();
+                        }
+                        else {
+                            // get the leading comments from the node
+                            return ts.getLeadingCommentRangesOfNodeFromText(node, currentText);
+                        }
+                    }
+                }
+            }
+            function getTrailingCommentsToEmit(node) {
+                // Emit the trailing comments only if the parent's pos doesn't match because parent should take care of emitting these comments
+                if (node.parent) {
+                    if (node.parent.kind === 256 /* SourceFile */ || node.end !== node.parent.end) {
+                        return ts.getTrailingCommentRanges(currentText, node.end);
+                    }
+                }
+            }
+            /**
+             * Emit comments associated with node that will not be emitted into JS file
+             */
+            function emitCommentsOnNotEmittedNode(node) {
+                emitLeadingCommentsWorker(node, /*isEmittedNode*/ false);
+            }
+            function emitLeadingComments(node) {
+                return emitLeadingCommentsWorker(node, /*isEmittedNode*/ true);
+            }
+            function emitLeadingCommentsWorker(node, isEmittedNode) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var leadingComments;
+                if (isEmittedNode) {
+                    leadingComments = getLeadingCommentsToEmit(node);
+                }
+                else {
+                    // If the node will not be emitted in JS, remove all the comments(normal, pinned and ///) associated with the node,
+                    // unless it is a triple slash comment at the top of the file.
+                    // For Example:
+                    //      /// <reference-path ...>
+                    //      declare var x;
+                    //      /// <reference-path ...>
+                    //      interface F {}
+                    //  The first /// will NOT be removed while the second one will be removed even though both node will not be emitted
+                    if (node.pos === 0) {
+                        leadingComments = ts.filter(getLeadingCommentsToEmit(node), isTripleSlashComment);
+                    }
+                }
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, node, leadingComments);
+                // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
+                ts.emitComments(currentText, currentLineMap, writer, leadingComments, /*trailingSeparator*/ true, newLine, writeComment);
+            }
+            function emitTrailingComments(node) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                // Emit the trailing comments only if the parent's end doesn't match
+                var trailingComments = getTrailingCommentsToEmit(node);
+                // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment*/
+                ts.emitComments(currentText, currentLineMap, writer, trailingComments, /*trailingSeparator*/ false, newLine, writeComment);
+            }
+            /**
+             * Emit trailing comments at the position. The term trailing comment is used here to describe following comment:
+             *      x, /comment1/ y
+             *        ^ => pos; the function will emit "comment1" in the emitJS
+             */
+            function emitTrailingCommentsOfPosition(pos) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var trailingComments = ts.getTrailingCommentRanges(currentText, pos);
+                // trailing comments are emitted at space/*trailing comment1 */space/*trailing comment*/
+                ts.emitComments(currentText, currentLineMap, writer, trailingComments, /*trailingSeparator*/ true, newLine, writeComment);
+            }
+            function emitLeadingCommentsOfPositionWorker(pos) {
+                if (compilerOptions.removeComments) {
+                    return;
+                }
+                var leadingComments;
+                if (hasDetachedComments(pos)) {
+                    // get comments without detached comments
+                    leadingComments = getLeadingCommentsWithoutDetachedComments();
+                }
+                else {
+                    // get the leading comments from the node
+                    leadingComments = ts.getLeadingCommentRanges(currentText, pos);
+                }
+                ts.emitNewLineBeforeLeadingComments(currentLineMap, writer, { pos: pos, end: pos }, leadingComments);
+                // Leading comments are emitted at /*leading comment1 */space/*leading comment*/space
+                ts.emitComments(currentText, currentLineMap, writer, leadingComments, /*trailingSeparator*/ true, newLine, writeComment);
+            }
+            function emitDetachedCommentsAndUpdateCommentsInfo(node) {
+                var currentDetachedCommentInfo = ts.emitDetachedComments(currentText, currentLineMap, writer, writeComment, node, newLine, compilerOptions.removeComments);
+                if (currentDetachedCommentInfo) {
+                    if (detachedCommentsInfo) {
+                        detachedCommentsInfo.push(currentDetachedCommentInfo);
+                    }
+                    else {
+                        detachedCommentsInfo = [currentDetachedCommentInfo];
+                    }
+                }
+            }
+            function writeComment(text, lineMap, writer, comment, newLine) {
+                emitPos(comment.pos);
+                ts.writeCommentRange(text, lineMap, writer, comment, newLine);
+                emitPos(comment.end);
+            }
+            function emitShebang() {
+                var shebang = ts.getShebang(currentText);
+                if (shebang) {
+                    write(shebang);
+                    writeLine();
+                }
+            }
+            var _a, _b;
+        }
+        function emitFile(_a, sourceFiles, isBundledEmit) {
+            var jsFilePath = _a.jsFilePath, sourceMapFilePath = _a.sourceMapFilePath, declarationFilePath = _a.declarationFilePath;
+            // Make sure not to write js File and source map file if any of them cannot be written
+            if (!host.isEmitBlocked(jsFilePath) && !compilerOptions.noEmit) {
+                emitJavaScript(jsFilePath, sourceMapFilePath, sourceFiles, isBundledEmit);
+            }
+            else {
+                emitSkipped = true;
+            }
+            if (declarationFilePath) {
+                emitSkipped = ts.writeDeclarationFile(declarationFilePath, sourceFiles, isBundledEmit, host, resolver, emitterDiagnostics) || emitSkipped;
+            }
+            if (!emitSkipped && emittedFilesList) {
+                emittedFilesList.push(jsFilePath);
+                if (sourceMapFilePath) {
+                    emittedFilesList.push(sourceMapFilePath);
+                }
+                if (declarationFilePath) {
+                    emittedFilesList.push(declarationFilePath);
+                }
+            }
+        }
+    }
+    ts.emitFiles = emitFiles;
+})(ts || (ts = {}));
+/// <reference path="sys.ts" />
+/// <reference path="emitter.ts" />
+/// <reference path="core.ts" />
+var ts;
+(function (ts) {
+    /* @internal */ ts.programTime = 0;
+    /* @internal */ ts.emitTime = 0;
+    /* @internal */ ts.ioReadTime = 0;
+    /* @internal */ ts.ioWriteTime = 0;
+    /** The version of the TypeScript compiler release */
+    var emptyArray = [];
+    var defaultLibrarySearchPaths = [
+        "types/",
+        "node_modules/",
+        "node_modules/@types/",
+    ];
+    ts.version = "1.9.0";
+    function findConfigFile(searchPath, fileExists) {
+        while (true) {
+            var fileName = ts.combinePaths(searchPath, "tsconfig.json");
+            if (fileExists(fileName)) {
+                return fileName;
+            }
+            var parentPath = ts.getDirectoryPath(searchPath);
+            if (parentPath === searchPath) {
+                break;
+            }
+            searchPath = parentPath;
+        }
+        return undefined;
+    }
+    ts.findConfigFile = findConfigFile;
+    function resolveTripleslashReference(moduleName, containingFile) {
+        var basePath = ts.getDirectoryPath(containingFile);
+        var referencedFileName = ts.isRootedDiskPath(moduleName) ? moduleName : ts.combinePaths(basePath, moduleName);
+        return ts.normalizePath(referencedFileName);
+    }
+    ts.resolveTripleslashReference = resolveTripleslashReference;
+    /* @internal */
+    function computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName) {
+        var commonPathComponents;
+        var failed = ts.forEach(fileNames, function (sourceFile) {
+            // Each file contributes into common source file path
+            var sourcePathComponents = ts.getNormalizedPathComponents(sourceFile, currentDirectory);
+            sourcePathComponents.pop(); // The base file name is not part of the common directory path
+            if (!commonPathComponents) {
+                // first file
+                commonPathComponents = sourcePathComponents;
+                return;
+            }
+            for (var i = 0, n = Math.min(commonPathComponents.length, sourcePathComponents.length); i < n; i++) {
+                if (getCanonicalFileName(commonPathComponents[i]) !== getCanonicalFileName(sourcePathComponents[i])) {
+                    if (i === 0) {
+                        // Failed to find any common path component
+                        return true;
+                    }
+                    // New common path found that is 0 -> i-1
+                    commonPathComponents.length = i;
+                    break;
+                }
+            }
+            // If the sourcePathComponents was shorter than the commonPathComponents, truncate to the sourcePathComponents
+            if (sourcePathComponents.length < commonPathComponents.length) {
+                commonPathComponents.length = sourcePathComponents.length;
+            }
+        });
+        // A common path can not be found when paths span multiple drives on windows, for example
+        if (failed) {
+            return "";
+        }
+        if (!commonPathComponents) {
+            return currentDirectory;
+        }
+        return ts.getNormalizedPathFromPathComponents(commonPathComponents);
+    }
+    ts.computeCommonSourceDirectoryOfFilenames = computeCommonSourceDirectoryOfFilenames;
+    function trace(host, message) {
+        host.trace(ts.formatMessage.apply(undefined, arguments));
+    }
+    function isTraceEnabled(compilerOptions, host) {
+        return compilerOptions.traceResolution && host.trace !== undefined;
+    }
+    /* @internal */
+    function hasZeroOrOneAsteriskCharacter(str) {
+        var seenAsterisk = false;
+        for (var i = 0; i < str.length; i++) {
+            if (str.charCodeAt(i) === 42 /* asterisk */) {
+                if (!seenAsterisk) {
+                    seenAsterisk = true;
+                }
+                else {
+                    // have already seen asterisk
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+    ts.hasZeroOrOneAsteriskCharacter = hasZeroOrOneAsteriskCharacter;
+    function createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations) {
+        return { resolvedModule: resolvedFileName ? { resolvedFileName: resolvedFileName, isExternalLibraryImport: isExternalLibraryImport } : undefined, failedLookupLocations: failedLookupLocations };
+    }
+    function moduleHasNonRelativeName(moduleName) {
+        if (ts.isRootedDiskPath(moduleName)) {
+            return false;
+        }
+        var i = moduleName.lastIndexOf("./", 1);
+        var startsWithDotSlashOrDotDotSlash = i === 0 || (i === 1 && moduleName.charCodeAt(0) === 46 /* dot */);
+        return !startsWithDotSlashOrDotDotSlash;
+    }
+    function tryReadTypesSection(packageJsonPath, baseDirectory, state) {
+        var jsonContent;
+        try {
+            var jsonText = state.host.readFile(packageJsonPath);
+            jsonContent = jsonText ? JSON.parse(jsonText) : {};
+        }
+        catch (e) {
+            // gracefully handle if readFile fails or returns not JSON
+            jsonContent = {};
+        }
+        var typesFile;
+        var fieldName;
+        // first try to read content of 'typings' section (backward compatibility)
+        if (jsonContent.typings) {
+            if (typeof jsonContent.typings === "string") {
+                fieldName = "typings";
+                typesFile = jsonContent.typings;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "typings", typeof jsonContent.typings);
+                }
+            }
+        }
+        // then read 'types'
+        if (!typesFile && jsonContent.types) {
+            if (typeof jsonContent.types === "string") {
+                fieldName = "types";
+                typesFile = jsonContent.types;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Expected_type_of_0_field_in_package_json_to_be_string_got_1, "types", typeof jsonContent.types);
+                }
+            }
+        }
+        if (typesFile) {
+            var typesFilePath = ts.normalizePath(ts.combinePaths(baseDirectory, typesFile));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.package_json_has_0_field_1_that_references_2, fieldName, typesFile, typesFilePath);
+            }
+            return typesFilePath;
+        }
+        return undefined;
+    }
+    var typeReferenceExtensions = [".d.ts"];
+    /**
+     * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
+     * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
+     * is assumed to be the same as root directory of the project.
+     */
+    function resolveTypeReferenceDirective(typeReferenceDirectiveName, containingFile, options, host) {
+        var traceEnabled = isTraceEnabled(options, host);
+        var moduleResolutionState = {
+            compilerOptions: options,
+            host: host,
+            skipTsx: true,
+            traceEnabled: traceEnabled
+        };
+        // use typesRoot and fallback to directory that contains tsconfig or current directory if typesRoot is not set
+        var rootDir = options.typesRoot || (options.configFilePath ? ts.getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
+        if (traceEnabled) {
+            if (containingFile === undefined) {
+                if (rootDir === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, rootDir);
+                }
+            }
+            else {
+                if (rootDir === undefined) {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, rootDir);
+                }
+            }
+        }
+        var failedLookupLocations = [];
+        // Check primary library paths
+        if (rootDir !== undefined) {
+            var effectivePrimarySearchPaths = options.typesSearchPaths || defaultLibrarySearchPaths;
+            for (var _i = 0, effectivePrimarySearchPaths_1 = effectivePrimarySearchPaths; _i < effectivePrimarySearchPaths_1.length; _i++) {
+                var searchPath = effectivePrimarySearchPaths_1[_i];
+                var primaryPath = ts.combinePaths(rootDir, searchPath);
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Resolving_with_primary_search_path_0, primaryPath);
+                }
+                var candidate = ts.combinePaths(primaryPath, typeReferenceDirectiveName);
+                var candidateDirectory = ts.getDirectoryPath(candidate);
+                var resolvedFile_1 = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations, !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
+                if (resolvedFile_1) {
+                    if (traceEnabled) {
+                        trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile_1, true);
+                    }
+                    return {
+                        resolvedTypeReferenceDirective: { primary: true, resolvedFileName: resolvedFile_1 },
+                        failedLookupLocations: failedLookupLocations
+                    };
+                }
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Root_directory_cannot_be_determined_skipping_primary_search_paths);
+            }
+        }
+        var resolvedFile;
+        var initialLocationForSecondaryLookup;
+        if (containingFile) {
+            initialLocationForSecondaryLookup = ts.getDirectoryPath(containingFile);
+        }
+        else {
+            initialLocationForSecondaryLookup = rootDir;
+        }
+        if (initialLocationForSecondaryLookup !== undefined) {
+            // check secondary locations
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Looking_up_in_node_modules_folder_initial_location_0, initialLocationForSecondaryLookup);
+            }
+            resolvedFile = loadModuleFromNodeModules(typeReferenceDirectiveName, initialLocationForSecondaryLookup, failedLookupLocations, moduleResolutionState);
+            if (traceEnabled) {
+                if (resolvedFile) {
+                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_successfully_resolved_to_1_primary_Colon_2, typeReferenceDirectiveName, resolvedFile, false);
+                }
+                else {
+                    trace(host, ts.Diagnostics.Type_reference_directive_0_was_not_resolved, typeReferenceDirectiveName);
+                }
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Containing_file_is_not_specified_and_root_directory_cannot_be_determined_skipping_lookup_in_node_modules_folder);
+            }
+        }
+        return {
+            resolvedTypeReferenceDirective: resolvedFile
+                ? { primary: false, resolvedFileName: resolvedFile }
+                : undefined,
+            failedLookupLocations: failedLookupLocations
+        };
+    }
+    ts.resolveTypeReferenceDirective = resolveTypeReferenceDirective;
+    function resolveModuleName(moduleName, containingFile, compilerOptions, host) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        if (traceEnabled) {
+            trace(host, ts.Diagnostics.Resolving_module_0_from_1, moduleName, containingFile);
+        }
+        var moduleResolution = compilerOptions.moduleResolution;
+        if (moduleResolution === undefined) {
+            moduleResolution = ts.getEmitModuleKind(compilerOptions) === ts.ModuleKind.CommonJS ? ts.ModuleResolutionKind.NodeJs : ts.ModuleResolutionKind.Classic;
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Module_resolution_kind_is_not_specified_using_0, ts.ModuleResolutionKind[moduleResolution]);
+            }
+        }
+        else {
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Explicitly_specified_module_resolution_kind_Colon_0, ts.ModuleResolutionKind[moduleResolution]);
+            }
+        }
+        var result;
+        switch (moduleResolution) {
+            case ts.ModuleResolutionKind.NodeJs:
+                result = nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host);
+                break;
+            case ts.ModuleResolutionKind.Classic:
+                result = classicNameResolver(moduleName, containingFile, compilerOptions, host);
+                break;
+        }
+        if (traceEnabled) {
+            if (result.resolvedModule) {
+                trace(host, ts.Diagnostics.Module_name_0_was_successfully_resolved_to_1, moduleName, result.resolvedModule.resolvedFileName);
+            }
+            else {
+                trace(host, ts.Diagnostics.Module_name_0_was_not_resolved, moduleName);
+            }
+        }
+        return result;
+    }
+    ts.resolveModuleName = resolveModuleName;
+    /**
+     * Any module resolution kind can be augmented with optional settings: 'baseUrl', 'paths' and 'rootDirs' - they are used to
+     * mitigate differences between design time structure of the project and its runtime counterpart so the same import name
+     * can be resolved successfully by TypeScript compiler and runtime module loader.
+     * If these settings are set then loading procedure will try to use them to resolve module name and it can of failure it will
+     * fallback to standard resolution routine.
+     *
+     * - baseUrl - this setting controls how non-relative module names are resolved. If this setting is specified then non-relative
+     * names will be resolved relative to baseUrl: i.e. if baseUrl is '/a/b' then candidate location to resolve module name 'c/d' will
+     * be '/a/b/c/d'
+     * - paths - this setting can only be used when baseUrl is specified. allows to tune how non-relative module names
+     * will be resolved based on the content of the module name.
+     * Structure of 'paths' compiler options
+     * 'paths': {
+     *    pattern-1: [...substitutions],
+     *    pattern-2: [...substitutions],
+     *    ...
+     *    pattern-n: [...substitutions]
+     * }
+     * Pattern here is a string that can contain zero or one '*' character. During module resolution module name will be matched against
+     * all patterns in the list. Matching for patterns that don't contain '*' means that module name must be equal to pattern respecting the case.
+     * If pattern contains '*' then to match pattern "<prefix>*<suffix>" module name must start with the <prefix> and end with <suffix>.
+     * <MatchedStar> denotes part of the module name between <prefix> and <suffix>.
+     * If module name can be matches with multiple patterns then pattern with the longest prefix will be picked.
+     * After selecting pattern we'll use list of substitutions to get candidate locations of the module and the try to load module
+     * from the candidate location.
+     * Substitution is a string that can contain zero or one '*'. To get candidate location from substitution we'll pick every
+     * substitution in the list and replace '*' with <MatchedStar> string. If candidate location is not rooted it
+     * will be converted to absolute using baseUrl.
+     * For example:
+     * baseUrl: /a/b/c
+     * "paths": {
+     *     // match all module names
+     *     "*": [
+     *         "*",        // use matched name as is,
+     *                     // <matched name> will be looked as /a/b/c/<matched name>
+     *
+     *         "folder1/*" // substitution will convert matched name to 'folder1/<matched name>',
+     *                     // since it is not rooted then final candidate location will be /a/b/c/folder1/<matched name>
+     *     ],
+     *     // match module names that start with 'components/'
+     *     "components/*": [ "/root/components/*" ] // substitution will convert /components/folder1/<matched name> to '/root/components/folder1/<matched name>',
+     *                                              // it is rooted so it will be final candidate location
+     * }
+     *
+     * 'rootDirs' allows the project to be spreaded across multiple locations and resolve modules with relative names as if
+     * they were in the same location. For example lets say there are two files
+     * '/local/src/content/file1.ts'
+     * '/shared/components/contracts/src/content/protocols/file2.ts'
+     * After bundling content of '/shared/components/contracts/src' will be merged with '/local/src' so
+     * if file1 has the following import 'import {x} from "./protocols/file2"' it will be resolved successfully in runtime.
+     * 'rootDirs' provides the way to tell compiler that in order to get the whole project it should behave as if content of all
+     * root dirs were merged together.
+     * I.e. for the example above 'rootDirs' will have two entries: [ '/local/src', '/shared/components/contracts/src' ].
+     * Compiler will first convert './protocols/file2' into absolute path relative to the location of containing file:
+     * '/local/src/content/protocols/file2' and try to load it - failure.
+     * Then it will search 'rootDirs' looking for a longest matching prefix of this absolute path and if such prefix is found - absolute path will
+     * be converted to a path relative to found rootDir entry './content/protocols/file2' (*). As a last step compiler will check all remaining
+     * entries in 'rootDirs', use them to build absolute path out of (*) and try to resolve module from this location.
+     */
+    function tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
+        if (moduleHasNonRelativeName(moduleName)) {
+            return tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state);
+        }
+        else {
+            return tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state);
+        }
+    }
+    function tryLoadModuleUsingRootDirs(moduleName, containingDirectory, loader, failedLookupLocations, supportedExtensions, state) {
+        if (!state.compilerOptions.rootDirs) {
+            return undefined;
+        }
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.rootDirs_option_is_set_using_it_to_resolve_relative_module_name_0, moduleName);
+        }
+        var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+        var matchedRootDir;
+        var matchedNormalizedPrefix;
+        for (var _i = 0, _a = state.compilerOptions.rootDirs; _i < _a.length; _i++) {
+            var rootDir = _a[_i];
+            // rootDirs are expected to be absolute
+            // in case of tsconfig.json this will happen automatically - compiler will expand relative names
+            // using location of tsconfig.json as base location
+            var normalizedRoot = ts.normalizePath(rootDir);
+            if (!ts.endsWith(normalizedRoot, ts.directorySeparator)) {
+                normalizedRoot += ts.directorySeparator;
+            }
+            var isLongestMatchingPrefix = ts.startsWith(candidate, normalizedRoot) &&
+                (matchedNormalizedPrefix === undefined || matchedNormalizedPrefix.length < normalizedRoot.length);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Checking_if_0_is_the_longest_matching_prefix_for_1_2, normalizedRoot, candidate, isLongestMatchingPrefix);
+            }
+            if (isLongestMatchingPrefix) {
+                matchedNormalizedPrefix = normalizedRoot;
+                matchedRootDir = rootDir;
+            }
+        }
+        if (matchedNormalizedPrefix) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Longest_matching_prefix_for_0_is_1, candidate, matchedNormalizedPrefix);
+            }
+            var suffix = candidate.substr(matchedNormalizedPrefix.length);
+            // first - try to load from a initial location
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, matchedNormalizedPrefix, candidate);
+            }
+            var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(containingDirectory, state.host), state);
+            if (resolvedFileName) {
+                return resolvedFileName;
+            }
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Trying_other_entries_in_rootDirs);
+            }
+            // then try to resolve using remaining entries in rootDirs
+            for (var _b = 0, _c = state.compilerOptions.rootDirs; _b < _c.length; _b++) {
+                var rootDir = _c[_b];
+                if (rootDir === matchedRootDir) {
+                    // skip the initially matched entry
+                    continue;
+                }
+                var candidate_1 = ts.combinePaths(ts.normalizePath(rootDir), suffix);
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Loading_0_from_the_root_dir_1_candidate_location_2, suffix, rootDir, candidate_1);
+                }
+                var baseDirectory = ts.getDirectoryPath(candidate_1);
+                var resolvedFileName_1 = loader(candidate_1, supportedExtensions, failedLookupLocations, !directoryProbablyExists(baseDirectory, state.host), state);
+                if (resolvedFileName_1) {
+                    return resolvedFileName_1;
+                }
+            }
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_resolution_using_rootDirs_has_failed);
+            }
+        }
+        return undefined;
+    }
+    function tryLoadModuleUsingBaseUrl(moduleName, loader, failedLookupLocations, supportedExtensions, state) {
+        if (!state.compilerOptions.baseUrl) {
+            return undefined;
+        }
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.baseUrl_option_is_set_to_0_using_this_value_to_resolve_non_relative_module_name_1, state.compilerOptions.baseUrl, moduleName);
+        }
+        // string is for exact match
+        var matchedPattern = undefined;
+        if (state.compilerOptions.paths) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.paths_option_is_specified_looking_for_a_pattern_to_match_module_name_0, moduleName);
+            }
+            matchedPattern = matchPatternOrExact(ts.getKeys(state.compilerOptions.paths), moduleName);
+        }
+        if (matchedPattern) {
+            var matchedStar = typeof matchedPattern === "string" ? undefined : matchedText(matchedPattern, moduleName);
+            var matchedPatternText = typeof matchedPattern === "string" ? matchedPattern : patternText(matchedPattern);
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Module_name_0_matched_pattern_1, moduleName, matchedPatternText);
+            }
+            for (var _i = 0, _a = state.compilerOptions.paths[matchedPatternText]; _i < _a.length; _i++) {
+                var subst = _a[_i];
+                var path = matchedStar ? subst.replace("*", matchedStar) : subst;
+                var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, path));
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.Trying_substitution_0_candidate_module_location_Colon_1, subst, path);
+                }
+                var resolvedFileName = loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+                if (resolvedFileName) {
+                    return resolvedFileName;
+                }
+            }
+            return undefined;
+        }
+        else {
+            var candidate = ts.normalizePath(ts.combinePaths(state.compilerOptions.baseUrl, moduleName));
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Resolving_module_name_0_relative_to_base_url_1_2, moduleName, state.compilerOptions.baseUrl, candidate);
+            }
+            return loader(candidate, supportedExtensions, failedLookupLocations, !directoryProbablyExists(ts.getDirectoryPath(candidate), state.host), state);
+        }
+    }
+    /**
+     * patternStrings contains both pattern strings (containing "*") and regular strings.
+     * Return an exact match if possible, or a pattern match, or undefined.
+     * (These are verified by verifyCompilerOptions to have 0 or 1 "*" characters.)
+     */
+    function matchPatternOrExact(patternStrings, candidate) {
+        var patterns = [];
+        for (var _i = 0, patternStrings_1 = patternStrings; _i < patternStrings_1.length; _i++) {
+            var patternString = patternStrings_1[_i];
+            var pattern = tryParsePattern(patternString);
+            if (pattern) {
+                patterns.push(pattern);
+            }
+            else if (patternString === candidate) {
+                // pattern was matched as is - no need to search further
+                return patternString;
+            }
+        }
+        return findBestPatternMatch(patterns, function (_) { return _; }, candidate);
+    }
+    function patternText(_a) {
+        var prefix = _a.prefix, suffix = _a.suffix;
+        return prefix + "*" + suffix;
+    }
+    /**
+     * Given that candidate matches pattern, returns the text matching the '*'.
+     * E.g.: matchedText(tryParsePattern("foo*baz"), "foobarbaz") === "bar"
+     */
+    function matchedText(pattern, candidate) {
+        ts.Debug.assert(isPatternMatch(pattern, candidate));
+        return candidate.substr(pattern.prefix.length, candidate.length - pattern.suffix.length);
+    }
+    /** Return the object corresponding to the best pattern to match `candidate`. */
+    /* @internal */
+    function findBestPatternMatch(values, getPattern, candidate) {
+        var matchedValue = undefined;
+        // use length of prefix as betterness criteria
+        var longestMatchPrefixLength = -1;
+        for (var _i = 0, values_1 = values; _i < values_1.length; _i++) {
+            var v = values_1[_i];
+            var pattern = getPattern(v);
+            if (isPatternMatch(pattern, candidate) && pattern.prefix.length > longestMatchPrefixLength) {
+                longestMatchPrefixLength = pattern.prefix.length;
+                matchedValue = v;
+            }
+        }
+        return matchedValue;
+    }
+    ts.findBestPatternMatch = findBestPatternMatch;
+    function isPatternMatch(_a, candidate) {
+        var prefix = _a.prefix, suffix = _a.suffix;
+        return candidate.length >= prefix.length + suffix.length &&
+            ts.startsWith(candidate, prefix) &&
+            ts.endsWith(candidate, suffix);
+    }
+    /* @internal */
+    function tryParsePattern(pattern) {
+        // This should be verified outside of here and a proper error thrown.
+        ts.Debug.assert(hasZeroOrOneAsteriskCharacter(pattern));
+        var indexOfStar = pattern.indexOf("*");
+        return indexOfStar === -1 ? undefined : {
+            prefix: pattern.substr(0, indexOfStar),
+            suffix: pattern.substr(indexOfStar + 1)
+        };
+    }
+    ts.tryParsePattern = tryParsePattern;
+    function nodeModuleNameResolver(moduleName, containingFile, compilerOptions, host) {
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var failedLookupLocations = [];
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: false };
+        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, nodeLoadModuleByRelativeName, failedLookupLocations, supportedExtensions, state);
+        var isExternalLibraryImport = false;
+        if (!resolvedFileName) {
+            if (moduleHasNonRelativeName(moduleName)) {
+                if (traceEnabled) {
+                    trace(host, ts.Diagnostics.Loading_module_0_from_node_modules_folder, moduleName);
+                }
+                resolvedFileName = loadModuleFromNodeModules(moduleName, containingDirectory, failedLookupLocations, state);
+                isExternalLibraryImport = resolvedFileName !== undefined;
+            }
+            else {
+                var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                resolvedFileName = nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+            }
+        }
+        if (resolvedFileName && host.realpath) {
+            var originalFileName = resolvedFileName;
+            resolvedFileName = ts.normalizePath(host.realpath(resolvedFileName));
+            if (traceEnabled) {
+                trace(host, ts.Diagnostics.Resolving_real_path_for_0_result_1, originalFileName, resolvedFileName);
+            }
+        }
+        return createResolvedModule(resolvedFileName, isExternalLibraryImport, failedLookupLocations);
+    }
+    ts.nodeModuleNameResolver = nodeModuleNameResolver;
+    function nodeLoadModuleByRelativeName(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state) {
+        if (state.traceEnabled) {
+            trace(state.host, ts.Diagnostics.Loading_module_as_file_Slash_folder_candidate_module_location_0, candidate);
+        }
+        var resolvedFileName = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, onlyRecordFailures, state);
+        return resolvedFileName || loadNodeModuleFromDirectory(supportedExtensions, candidate, failedLookupLocations, onlyRecordFailures, state);
+    }
+    /* @internal */
+    function directoryProbablyExists(directoryName, host) {
+        // if host does not support 'directoryExists' assume that directory will exist
+        return !host.directoryExists || host.directoryExists(directoryName);
+    }
+    ts.directoryProbablyExists = directoryProbablyExists;
+    /**
+     * @param {boolean} onlyRecordFailures - if true then function won't try to actually load files but instead record all attempts as failures. This flag is necessary
+     * in cases when we know upfront that all load attempts will fail (because containing folder does not exists) however we still need to record all failed lookup locations.
+     */
+    function loadModuleFromFile(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
+        // First try to keep/add an extension: importing "./foo.ts" can be matched by a file "./foo.ts", and "./foo" by "./foo.d.ts"
+        var resolvedByAddingOrKeepingExtension = loadModuleFromFileWorker(candidate, extensions, failedLookupLocation, onlyRecordFailures, state);
+        if (resolvedByAddingOrKeepingExtension) {
+            return resolvedByAddingOrKeepingExtension;
+        }
+        // Then try stripping a ".js" or ".jsx" extension and replacing it with a TypeScript one, e.g. "./foo.js" can be matched by "./foo.ts" or "./foo.d.ts"
+        if (ts.hasJavaScriptFileExtension(candidate)) {
+            var extensionless = ts.removeFileExtension(candidate);
+            if (state.traceEnabled) {
+                var extension = candidate.substring(extensionless.length);
+                trace(state.host, ts.Diagnostics.File_name_0_has_a_1_extension_stripping_it, candidate, extension);
+            }
+            return loadModuleFromFileWorker(extensionless, extensions, failedLookupLocation, onlyRecordFailures, state);
+        }
+    }
+    function loadModuleFromFileWorker(candidate, extensions, failedLookupLocation, onlyRecordFailures, state) {
+        if (!onlyRecordFailures) {
+            // check if containing folder exists - if it doesn't then just record failures for all supported extensions without disk probing
+            var directory = ts.getDirectoryPath(candidate);
+            if (directory) {
+                onlyRecordFailures = !directoryProbablyExists(directory, state.host);
+            }
+        }
+        return ts.forEach(extensions, tryLoad);
+        function tryLoad(ext) {
+            if (state.skipTsx && ts.isJsxOrTsxExtension(ext)) {
+                return undefined;
+            }
+            var fileName = ts.fileExtensionIs(candidate, ext) ? candidate : candidate + ext;
+            if (!onlyRecordFailures && state.host.fileExists(fileName)) {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_exist_use_it_as_a_name_resolution_result, fileName);
+                }
+                return fileName;
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.File_0_does_not_exist, fileName);
+                }
+                failedLookupLocation.push(fileName);
+                return undefined;
+            }
+        }
+    }
+    function loadNodeModuleFromDirectory(extensions, candidate, failedLookupLocation, onlyRecordFailures, state) {
+        var packageJsonPath = ts.combinePaths(candidate, "package.json");
+        var directoryExists = !onlyRecordFailures && directoryProbablyExists(candidate, state.host);
+        if (directoryExists && state.host.fileExists(packageJsonPath)) {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.Found_package_json_at_0, packageJsonPath);
+            }
+            var typesFile = tryReadTypesSection(packageJsonPath, candidate, state);
+            if (typesFile) {
+                var result = loadModuleFromFile(typesFile, extensions, failedLookupLocation, !directoryProbablyExists(ts.getDirectoryPath(typesFile), state.host), state);
+                if (result) {
+                    return result;
+                }
+            }
+            else {
+                if (state.traceEnabled) {
+                    trace(state.host, ts.Diagnostics.package_json_does_not_have_types_field);
+                }
+            }
+        }
+        else {
+            if (state.traceEnabled) {
+                trace(state.host, ts.Diagnostics.File_0_does_not_exist, packageJsonPath);
+            }
+            // record package json as one of failed lookup locations - in the future if this file will appear it will invalidate resolution results
+            failedLookupLocation.push(packageJsonPath);
+        }
+        return loadModuleFromFile(ts.combinePaths(candidate, "index"), extensions, failedLookupLocation, !directoryExists, state);
+    }
+    function loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) {
+        var nodeModulesFolder = ts.combinePaths(directory, "node_modules");
+        var nodeModulesFolderExists = directoryProbablyExists(nodeModulesFolder, state.host);
+        var candidate = ts.normalizePath(ts.combinePaths(nodeModulesFolder, moduleName));
+        // Load only typescript files irrespective of allowJs option if loading from node modules
+        var result = loadModuleFromFile(candidate, ts.supportedTypeScriptExtensions, failedLookupLocations, !nodeModulesFolderExists, state);
+        if (result) {
+            return result;
+        }
+        result = loadNodeModuleFromDirectory(ts.supportedTypeScriptExtensions, candidate, failedLookupLocations, !nodeModulesFolderExists, state);
+        if (result) {
+            return result;
+        }
+    }
+    function loadModuleFromNodeModules(moduleName, directory, failedLookupLocations, state) {
+        directory = ts.normalizeSlashes(directory);
+        while (true) {
+            var baseName = ts.getBaseFileName(directory);
+            if (baseName !== "node_modules") {
+                var result = 
+                // first: try to load module as-is
+                loadModuleFromNodeModulesFolder(moduleName, directory, failedLookupLocations, state) ||
+                    // second: try to load module from the scope '@types'
+                    loadModuleFromNodeModulesFolder(ts.combinePaths("@types", moduleName), directory, failedLookupLocations, state);
+                if (result) {
+                    return result;
+                }
+            }
+            var parentPath = ts.getDirectoryPath(directory);
+            if (parentPath === directory) {
+                break;
+            }
+            directory = parentPath;
+        }
+        return undefined;
+    }
+    function classicNameResolver(moduleName, containingFile, compilerOptions, host) {
+        var traceEnabled = isTraceEnabled(compilerOptions, host);
+        var state = { compilerOptions: compilerOptions, host: host, traceEnabled: traceEnabled, skipTsx: !compilerOptions.jsx };
+        var failedLookupLocations = [];
+        var supportedExtensions = ts.getSupportedExtensions(compilerOptions);
+        var containingDirectory = ts.getDirectoryPath(containingFile);
+        var resolvedFileName = tryLoadModuleUsingOptionalResolutionSettings(moduleName, containingDirectory, loadModuleFromFile, failedLookupLocations, supportedExtensions, state);
+        if (resolvedFileName) {
+            return createResolvedModule(resolvedFileName, /*isExternalLibraryImport*/ false, failedLookupLocations);
+        }
+        var referencedSourceFile;
+        if (moduleHasNonRelativeName(moduleName)) {
+            while (true) {
+                var searchName = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+                referencedSourceFile = loadModuleFromFile(searchName, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+                if (referencedSourceFile) {
+                    break;
+                }
+                var parentPath = ts.getDirectoryPath(containingDirectory);
+                if (parentPath === containingDirectory) {
+                    break;
+                }
+                containingDirectory = parentPath;
+            }
+        }
+        else {
+            var candidate = ts.normalizePath(ts.combinePaths(containingDirectory, moduleName));
+            referencedSourceFile = loadModuleFromFile(candidate, supportedExtensions, failedLookupLocations, /*onlyRecordFailures*/ false, state);
+        }
+        return referencedSourceFile
+            ? { resolvedModule: { resolvedFileName: referencedSourceFile }, failedLookupLocations: failedLookupLocations }
+            : { resolvedModule: undefined, failedLookupLocations: failedLookupLocations };
+    }
+    ts.classicNameResolver = classicNameResolver;
+    /* @internal */
+    ts.defaultInitCompilerOptions = {
+        module: ts.ModuleKind.CommonJS,
+        target: 1 /* ES5 */,
+        noImplicitAny: false,
+        sourceMap: false
+    };
+    function createCompilerHost(options, setParentNodes) {
+        var existingDirectories = {};
+        function getCanonicalFileName(fileName) {
+            // if underlying system can distinguish between two files whose names differs only in cases then file name already in canonical form.
+            // otherwise use toLowerCase as a canonical form.
+            return ts.sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
+        }
+        // returned by CScript sys environment
+        var unsupportedFileEncodingErrorCode = -2147024809;
+        function getSourceFile(fileName, languageVersion, onError) {
+            var text;
+            try {
+                var start = new Date().getTime();
+                text = ts.sys.readFile(fileName, options.charset);
+                ts.ioReadTime += new Date().getTime() - start;
+            }
+            catch (e) {
+                if (onError) {
+                    onError(e.number === unsupportedFileEncodingErrorCode
+                        ? ts.createCompilerDiagnostic(ts.Diagnostics.Unsupported_file_encoding).messageText
+                        : e.message);
+                }
+                text = "";
+            }
+            return text !== undefined ? ts.createSourceFile(fileName, text, languageVersion, setParentNodes) : undefined;
+        }
+        function directoryExists(directoryPath) {
+            if (ts.hasProperty(existingDirectories, directoryPath)) {
+                return true;
+            }
+            if (ts.sys.directoryExists(directoryPath)) {
+                existingDirectories[directoryPath] = true;
+                return true;
+            }
+            return false;
+        }
+        function ensureDirectoriesExist(directoryPath) {
+            if (directoryPath.length > ts.getRootLength(directoryPath) && !directoryExists(directoryPath)) {
+                var parentDirectory = ts.getDirectoryPath(directoryPath);
+                ensureDirectoriesExist(parentDirectory);
+                ts.sys.createDirectory(directoryPath);
+            }
+        }
+        var outputFingerprints;
+        function writeFileIfUpdated(fileName, data, writeByteOrderMark) {
+            if (!outputFingerprints) {
+                outputFingerprints = {};
+            }
+            var hash = ts.sys.createHash(data);
+            var mtimeBefore = ts.sys.getModifiedTime(fileName);
+            if (mtimeBefore && ts.hasProperty(outputFingerprints, fileName)) {
+                var fingerprint = outputFingerprints[fileName];
+                // If output has not been changed, and the file has no external modification
+                if (fingerprint.byteOrderMark === writeByteOrderMark &&
+                    fingerprint.hash === hash &&
+                    fingerprint.mtime.getTime() === mtimeBefore.getTime()) {
+                    return;
+                }
+            }
+            ts.sys.writeFile(fileName, data, writeByteOrderMark);
+            var mtimeAfter = ts.sys.getModifiedTime(fileName);
+            outputFingerprints[fileName] = {
+                hash: hash,
+                byteOrderMark: writeByteOrderMark,
+                mtime: mtimeAfter
+            };
+        }
+        function writeFile(fileName, data, writeByteOrderMark, onError) {
+            try {
+                var start = new Date().getTime();
+                ensureDirectoriesExist(ts.getDirectoryPath(ts.normalizePath(fileName)));
+                if (ts.isWatchSet(options) && ts.sys.createHash && ts.sys.getModifiedTime) {
+                    writeFileIfUpdated(fileName, data, writeByteOrderMark);
+                }
+                else {
+                    ts.sys.writeFile(fileName, data, writeByteOrderMark);
+                }
+                ts.ioWriteTime += new Date().getTime() - start;
+            }
+            catch (e) {
+                if (onError) {
+                    onError(e.message);
+                }
+            }
+        }
+        function getDefaultTypeDirectiveNames(rootPath) {
+            var localTypes = ts.combinePaths(rootPath, "types");
+            var npmTypes = ts.combinePaths(rootPath, "node_modules/@types");
+            var result = [];
+            if (ts.sys.directoryExists(localTypes)) {
+                result = result.concat(ts.sys.getDirectories(localTypes));
+            }
+            if (ts.sys.directoryExists(npmTypes)) {
+                result = result.concat(ts.sys.getDirectories(npmTypes));
+            }
+            return result;
+        }
+        function getDefaultLibLocation() {
+            return ts.getDirectoryPath(ts.normalizePath(ts.sys.getExecutingFilePath()));
+        }
+        var newLine = ts.getNewLineCharacter(options);
+        var realpath = ts.sys.realpath && (function (path) { return ts.sys.realpath(path); });
+        return {
+            getDefaultTypeDirectiveNames: getDefaultTypeDirectiveNames,
+            getSourceFile: getSourceFile,
+            getDefaultLibLocation: getDefaultLibLocation,
+            getDefaultLibFileName: function (options) { return ts.combinePaths(getDefaultLibLocation(), ts.getDefaultLibFileName(options)); },
+            writeFile: writeFile,
+            getCurrentDirectory: ts.memoize(function () { return ts.sys.getCurrentDirectory(); }),
+            useCaseSensitiveFileNames: function () { return ts.sys.useCaseSensitiveFileNames; },
+            getCanonicalFileName: getCanonicalFileName,
+            getNewLine: function () { return newLine; },
+            fileExists: function (fileName) { return ts.sys.fileExists(fileName); },
+            readFile: function (fileName) { return ts.sys.readFile(fileName); },
+            trace: function (s) { return ts.sys.write(s + newLine); },
+            directoryExists: function (directoryName) { return ts.sys.directoryExists(directoryName); },
+            realpath: realpath
+        };
+    }
+    ts.createCompilerHost = createCompilerHost;
+    function getPreEmitDiagnostics(program, sourceFile, cancellationToken) {
+        var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
+        if (program.getCompilerOptions().declaration) {
+            diagnostics = diagnostics.concat(program.getDeclarationDiagnostics(sourceFile, cancellationToken));
+        }
+        return ts.sortAndDeduplicateDiagnostics(diagnostics);
+    }
+    ts.getPreEmitDiagnostics = getPreEmitDiagnostics;
+    function flattenDiagnosticMessageText(messageText, newLine) {
+        if (typeof messageText === "string") {
+            return messageText;
+        }
+        else {
+            var diagnosticChain = messageText;
+            var result = "";
+            var indent = 0;
+            while (diagnosticChain) {
+                if (indent) {
+                    result += newLine;
+                    for (var i = 0; i < indent; i++) {
+                        result += "  ";
+                    }
+                }
+                result += diagnosticChain.messageText;
+                indent++;
+                diagnosticChain = diagnosticChain.next;
+            }
+            return result;
+        }
+    }
+    ts.flattenDiagnosticMessageText = flattenDiagnosticMessageText;
+    function loadWithLocalCache(names, containingFile, loader) {
+        if (names.length === 0) {
+            return [];
+        }
+        var resolutions = [];
+        var cache = {};
+        for (var _i = 0, names_1 = names; _i < names_1.length; _i++) {
+            var name_34 = names_1[_i];
+            var result = void 0;
+            if (ts.hasProperty(cache, name_34)) {
+                result = cache[name_34];
+            }
+            else {
+                result = loader(name_34, containingFile);
+                cache[name_34] = result;
+            }
+            resolutions.push(result);
+        }
+        return resolutions;
+    }
+    function getDefaultTypeDirectiveNames(options, rootFiles, host) {
+        // Use explicit type list from tsconfig.json
+        if (options.types) {
+            return options.types;
+        }
+        // or load all types from the automatic type import fields
+        if (host && host.getDefaultTypeDirectiveNames) {
+            var commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), function (f) { return host.getCanonicalFileName(f); });
+            if (commonRoot) {
+                return host.getDefaultTypeDirectiveNames(commonRoot);
+            }
+        }
+        return undefined;
+    }
+    ts.getDefaultTypeDirectiveNames = getDefaultTypeDirectiveNames;
+    function createProgram(rootNames, options, host, oldProgram) {
+        var program;
+        var files = [];
+        var commonSourceDirectory;
+        var diagnosticsProducingTypeChecker;
+        var noDiagnosticsTypeChecker;
+        var classifiableNames;
+        var resolvedTypeReferenceDirectives = {};
+        var fileProcessingDiagnostics = ts.createDiagnosticCollection();
+        var start = new Date().getTime();
+        host = host || createCompilerHost(options);
+        var skipDefaultLib = options.noLib;
+        var programDiagnostics = ts.createDiagnosticCollection();
+        var currentDirectory = host.getCurrentDirectory();
+        var supportedExtensions = ts.getSupportedExtensions(options);
+        // Map storing if there is emit blocking diagnostics for given input
+        var hasEmitBlockingDiagnostics = ts.createFileMap(getCanonicalFileName);
+        var resolveModuleNamesWorker;
+        if (host.resolveModuleNames) {
+            resolveModuleNamesWorker = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
+        }
+        else {
+            var loader_1 = function (moduleName, containingFile) { return resolveModuleName(moduleName, containingFile, options, host).resolvedModule; };
+            resolveModuleNamesWorker = function (moduleNames, containingFile) { return loadWithLocalCache(moduleNames, containingFile, loader_1); };
+        }
+        var resolveTypeReferenceDirectiveNamesWorker;
+        if (host.resolveTypeReferenceDirectives) {
+            resolveTypeReferenceDirectiveNamesWorker = function (typeDirectiveNames, containingFile) { return host.resolveTypeReferenceDirectives(typeDirectiveNames, containingFile); };
+        }
+        else {
+            var loader_2 = function (typesRef, containingFile) { return resolveTypeReferenceDirective(typesRef, containingFile, options, host).resolvedTypeReferenceDirective; };
+            resolveTypeReferenceDirectiveNamesWorker = function (typeReferenceDirectiveNames, containingFile) { return loadWithLocalCache(typeReferenceDirectiveNames, containingFile, loader_2); };
+        }
+        var filesByName = ts.createFileMap();
+        // stores 'filename -> file association' ignoring case
+        // used to track cases when two file names differ only in casing
+        var filesByNameIgnoreCase = host.useCaseSensitiveFileNames() ? ts.createFileMap(function (fileName) { return fileName.toLowerCase(); }) : undefined;
+        if (!tryReuseStructureFromOldProgram()) {
+            ts.forEach(rootNames, function (name) { return processRootFile(name, /*isDefaultLib*/ false); });
+            // load type declarations specified via 'types' argument
+            var typeReferences = getDefaultTypeDirectiveNames(options, rootNames, host);
+            if (typeReferences) {
+                var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, /*containingFile*/ undefined);
+                for (var i = 0; i < typeReferences.length; i++) {
+                    processTypeReferenceDirective(typeReferences[i], resolutions[i]);
+                }
+            }
+            // Do not process the default library if:
+            //  - The '--noLib' flag is used.
+            //  - A 'no-default-lib' reference comment is encountered in
+            //      processing the root files.
+            if (!skipDefaultLib) {
+                // If '--lib' is not specified, include default library file according to '--target'
+                // otherwise, using options specified in '--lib' instead of '--target' default library file
+                if (!options.lib) {
+                    processRootFile(host.getDefaultLibFileName(options), /*isDefaultLib*/ true);
+                }
+                else {
+                    var libDirectory_1 = host.getDefaultLibLocation ? host.getDefaultLibLocation() : ts.getDirectoryPath(host.getDefaultLibFileName(options));
+                    ts.forEach(options.lib, function (libFileName) {
+                        processRootFile(ts.combinePaths(libDirectory_1, libFileName), /*isDefaultLib*/ true);
+                    });
+                }
+            }
+        }
+        // unconditionally set oldProgram to undefined to prevent it from being captured in closure
+        oldProgram = undefined;
+        program = {
+            getRootFileNames: function () { return rootNames; },
+            getSourceFile: getSourceFile,
+            getSourceFileByPath: getSourceFileByPath,
+            getSourceFiles: function () { return files; },
+            getCompilerOptions: function () { return options; },
+            getSyntacticDiagnostics: getSyntacticDiagnostics,
+            getOptionsDiagnostics: getOptionsDiagnostics,
+            getGlobalDiagnostics: getGlobalDiagnostics,
+            getSemanticDiagnostics: getSemanticDiagnostics,
+            getDeclarationDiagnostics: getDeclarationDiagnostics,
+            getTypeChecker: getTypeChecker,
+            getClassifiableNames: getClassifiableNames,
+            getDiagnosticsProducingTypeChecker: getDiagnosticsProducingTypeChecker,
+            getCommonSourceDirectory: getCommonSourceDirectory,
+            emit: emit,
+            getCurrentDirectory: function () { return currentDirectory; },
+            getNodeCount: function () { return getDiagnosticsProducingTypeChecker().getNodeCount(); },
+            getIdentifierCount: function () { return getDiagnosticsProducingTypeChecker().getIdentifierCount(); },
+            getSymbolCount: function () { return getDiagnosticsProducingTypeChecker().getSymbolCount(); },
+            getTypeCount: function () { return getDiagnosticsProducingTypeChecker().getTypeCount(); },
+            getFileProcessingDiagnostics: function () { return fileProcessingDiagnostics; },
+            getResolvedTypeReferenceDirectives: function () { return resolvedTypeReferenceDirectives; }
+        };
+        verifyCompilerOptions();
+        ts.programTime += new Date().getTime() - start;
+        return program;
+        function getCommonSourceDirectory() {
+            if (typeof commonSourceDirectory === "undefined") {
+                if (options.rootDir && checkSourceFilesBelongToPath(files, options.rootDir)) {
+                    // If a rootDir is specified and is valid use it as the commonSourceDirectory
+                    commonSourceDirectory = ts.getNormalizedAbsolutePath(options.rootDir, currentDirectory);
+                }
+                else {
+                    commonSourceDirectory = computeCommonSourceDirectory(files);
+                }
+                if (commonSourceDirectory && commonSourceDirectory[commonSourceDirectory.length - 1] !== ts.directorySeparator) {
+                    // Make sure directory path ends with directory separator so this string can directly
+                    // used to replace with "" to get the relative path of the source file and the relative path doesn't
+                    // start with / making it rooted path
+                    commonSourceDirectory += ts.directorySeparator;
+                }
+            }
+            return commonSourceDirectory;
+        }
+        function getClassifiableNames() {
+            if (!classifiableNames) {
+                // Initialize a checker so that all our files are bound.
+                getTypeChecker();
+                classifiableNames = {};
+                for (var _i = 0, files_3 = files; _i < files_3.length; _i++) {
+                    var sourceFile = files_3[_i];
+                    ts.copyMap(sourceFile.classifiableNames, classifiableNames);
+                }
+            }
+            return classifiableNames;
+        }
+        function tryReuseStructureFromOldProgram() {
+            if (!oldProgram) {
+                return false;
+            }
+            // check properties that can affect structure of the program or module resolution strategy
+            // if any of these properties has changed - structure cannot be reused
+            var oldOptions = oldProgram.getCompilerOptions();
+            if ((oldOptions.module !== options.module) ||
+                (oldOptions.moduleResolution !== options.moduleResolution) ||
+                (oldOptions.noResolve !== options.noResolve) ||
+                (oldOptions.target !== options.target) ||
+                (oldOptions.noLib !== options.noLib) ||
+                (oldOptions.jsx !== options.jsx) ||
+                (oldOptions.allowJs !== options.allowJs) ||
+                (oldOptions.rootDir !== options.rootDir) ||
+                (oldOptions.typesSearchPaths !== options.typesSearchPaths) ||
+                (oldOptions.configFilePath !== options.configFilePath) ||
+                (oldOptions.baseUrl !== options.baseUrl) ||
+                (oldOptions.typesRoot !== options.typesRoot) ||
+                !ts.arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
+                !ts.mapIsEqualTo(oldOptions.paths, options.paths)) {
+                return false;
+            }
+            ts.Debug.assert(!oldProgram.structureIsReused);
+            // there is an old program, check if we can reuse its structure
+            var oldRootNames = oldProgram.getRootFileNames();
+            if (!ts.arrayIsEqualTo(oldRootNames, rootNames)) {
+                return false;
+            }
+            if (!ts.arrayIsEqualTo(options.types, oldOptions.types)) {
+                return false;
+            }
+            // check if program source files has changed in the way that can affect structure of the program
+            var newSourceFiles = [];
+            var filePaths = [];
+            var modifiedSourceFiles = [];
+            for (var _i = 0, _a = oldProgram.getSourceFiles(); _i < _a.length; _i++) {
+                var oldSourceFile = _a[_i];
+                var newSourceFile = host.getSourceFileByPath
+                    ? host.getSourceFileByPath(oldSourceFile.fileName, oldSourceFile.path, options.target)
+                    : host.getSourceFile(oldSourceFile.fileName, options.target);
+                if (!newSourceFile) {
+                    return false;
+                }
+                newSourceFile.path = oldSourceFile.path;
+                filePaths.push(newSourceFile.path);
+                if (oldSourceFile !== newSourceFile) {
+                    if (oldSourceFile.hasNoDefaultLib !== newSourceFile.hasNoDefaultLib) {
+                        // value of no-default-lib has changed
+                        // this will affect if default library is injected into the list of files
+                        return false;
+                    }
+                    // check tripleslash references
+                    if (!ts.arrayIsEqualTo(oldSourceFile.referencedFiles, newSourceFile.referencedFiles, fileReferenceIsEqualTo)) {
+                        // tripleslash references has changed
+                        return false;
+                    }
+                    // check imports and module augmentations
+                    collectExternalModuleReferences(newSourceFile);
+                    if (!ts.arrayIsEqualTo(oldSourceFile.imports, newSourceFile.imports, moduleNameIsEqualTo)) {
+                        // imports has changed
+                        return false;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.moduleAugmentations, newSourceFile.moduleAugmentations, moduleNameIsEqualTo)) {
+                        // moduleAugmentations has changed
+                        return false;
+                    }
+                    if (!ts.arrayIsEqualTo(oldSourceFile.typeReferenceDirectives, newSourceFile.typeReferenceDirectives, fileReferenceIsEqualTo)) {
+                        // 'types' references has changed
+                        return false;
+                    }
+                    var newSourceFilePath = ts.getNormalizedAbsolutePath(newSourceFile.fileName, currentDirectory);
+                    if (resolveModuleNamesWorker) {
+                        var moduleNames = ts.map(ts.concatenate(newSourceFile.imports, newSourceFile.moduleAugmentations), getTextOfLiteral);
+                        var resolutions = resolveModuleNamesWorker(moduleNames, newSourceFilePath);
+                        // ensure that module resolution results are still correct
+                        var resolutionsChanged = ts.hasChangesInResolutions(moduleNames, resolutions, oldSourceFile.resolvedModules, ts.moduleResolutionIsEqualTo);
+                        if (resolutionsChanged) {
+                            return false;
+                        }
+                    }
+                    if (resolveTypeReferenceDirectiveNamesWorker) {
+                        var typesReferenceDirectives = ts.map(newSourceFile.typeReferenceDirectives, function (x) { return x.fileName; });
+                        var resolutions = resolveTypeReferenceDirectiveNamesWorker(typesReferenceDirectives, newSourceFilePath);
+                        // ensure that types resolutions are still correct
+                        var resolutionsChanged = ts.hasChangesInResolutions(typesReferenceDirectives, resolutions, oldSourceFile.resolvedTypeReferenceDirectiveNames, ts.typeDirectiveIsEqualTo);
+                        if (resolutionsChanged) {
+                            return false;
+                        }
+                    }
+                    // pass the cache of module/types resolutions from the old source file
+                    newSourceFile.resolvedModules = oldSourceFile.resolvedModules;
+                    newSourceFile.resolvedTypeReferenceDirectiveNames = oldSourceFile.resolvedTypeReferenceDirectiveNames;
+                    modifiedSourceFiles.push(newSourceFile);
+                }
+                else {
+                    // file has no changes - use it as is
+                    newSourceFile = oldSourceFile;
+                }
+                // if file has passed all checks it should be safe to reuse it
+                newSourceFiles.push(newSourceFile);
+            }
+            // update fileName -> file mapping
+            for (var i = 0, len = newSourceFiles.length; i < len; i++) {
+                filesByName.set(filePaths[i], newSourceFiles[i]);
+            }
+            files = newSourceFiles;
+            fileProcessingDiagnostics = oldProgram.getFileProcessingDiagnostics();
+            for (var _b = 0, modifiedSourceFiles_1 = modifiedSourceFiles; _b < modifiedSourceFiles_1.length; _b++) {
+                var modifiedFile = modifiedSourceFiles_1[_b];
+                fileProcessingDiagnostics.reattachFileDiagnostics(modifiedFile);
+            }
+            resolvedTypeReferenceDirectives = oldProgram.getResolvedTypeReferenceDirectives();
+            oldProgram.structureIsReused = true;
+            return true;
+        }
+        function getEmitHost(writeFileCallback) {
+            return {
+                getCanonicalFileName: getCanonicalFileName,
+                getCommonSourceDirectory: program.getCommonSourceDirectory,
+                getCompilerOptions: program.getCompilerOptions,
+                getCurrentDirectory: function () { return currentDirectory; },
+                getNewLine: function () { return host.getNewLine(); },
+                getSourceFile: program.getSourceFile,
+                getSourceFileByPath: program.getSourceFileByPath,
+                getSourceFiles: program.getSourceFiles,
+                writeFile: writeFileCallback || (function (fileName, data, writeByteOrderMark, onError, sourceFiles) { return host.writeFile(fileName, data, writeByteOrderMark, onError, sourceFiles); }),
+                isEmitBlocked: isEmitBlocked
+            };
+        }
+        function getDiagnosticsProducingTypeChecker() {
+            return diagnosticsProducingTypeChecker || (diagnosticsProducingTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ true));
+        }
+        function getTypeChecker() {
+            return noDiagnosticsTypeChecker || (noDiagnosticsTypeChecker = ts.createTypeChecker(program, /*produceDiagnostics:*/ false));
+        }
+        function emit(sourceFile, writeFileCallback, cancellationToken) {
+            var _this = this;
+            return runWithCancellationToken(function () { return emitWorker(_this, sourceFile, writeFileCallback, cancellationToken); });
+        }
+        function isEmitBlocked(emitFileName) {
+            return hasEmitBlockingDiagnostics.contains(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName));
+        }
+        function emitWorker(program, sourceFile, writeFileCallback, cancellationToken) {
+            var declarationDiagnostics = [];
+            if (options.noEmit) {
+                return { diagnostics: declarationDiagnostics, sourceMaps: undefined, emittedFiles: undefined, emitSkipped: true };
+            }
+            // If the noEmitOnError flag is set, then check if we have any errors so far.  If so,
+            // immediately bail out.  Note that we pass 'undefined' for 'sourceFile' so that we
+            // get any preEmit diagnostics, not just the ones
+            if (options.noEmitOnError) {
+                var diagnostics = program.getOptionsDiagnostics(cancellationToken).concat(program.getSyntacticDiagnostics(sourceFile, cancellationToken), program.getGlobalDiagnostics(cancellationToken), program.getSemanticDiagnostics(sourceFile, cancellationToken));
+                if (diagnostics.length === 0 && program.getCompilerOptions().declaration) {
+                    declarationDiagnostics = program.getDeclarationDiagnostics(/*sourceFile*/ undefined, cancellationToken);
+                }
+                if (diagnostics.length > 0 || declarationDiagnostics.length > 0) {
+                    return {
+                        diagnostics: ts.concatenate(diagnostics, declarationDiagnostics),
+                        sourceMaps: undefined,
+                        emittedFiles: undefined,
+                        emitSkipped: true
+                    };
+                }
+            }
+            // Create the emit resolver outside of the "emitTime" tracking code below.  That way
+            // any cost associated with it (like type checking) are appropriate associated with
+            // the type-checking counter.
+            //
+            // If the -out option is specified, we should not pass the source file to getEmitResolver.
+            // This is because in the -out scenario all files need to be emitted, and therefore all
+            // files need to be type checked. And the way to specify that all files need to be type
+            // checked is to not pass the file to getEmitResolver.
+            var emitResolver = getDiagnosticsProducingTypeChecker().getEmitResolver((options.outFile || options.out) ? undefined : sourceFile);
+            var start = new Date().getTime();
+            var emitResult = ts.emitFiles(emitResolver, getEmitHost(writeFileCallback), sourceFile);
+            ts.emitTime += new Date().getTime() - start;
+            return emitResult;
+        }
+        function getSourceFile(fileName) {
+            return getSourceFileByPath(ts.toPath(fileName, currentDirectory, getCanonicalFileName));
+        }
+        function getSourceFileByPath(path) {
+            return filesByName.get(path);
+        }
+        function getDiagnosticsHelper(sourceFile, getDiagnostics, cancellationToken) {
+            if (sourceFile) {
+                return getDiagnostics(sourceFile, cancellationToken);
+            }
+            var allDiagnostics = [];
+            ts.forEach(program.getSourceFiles(), function (sourceFile) {
+                if (cancellationToken) {
+                    cancellationToken.throwIfCancellationRequested();
+                }
+                ts.addRange(allDiagnostics, getDiagnostics(sourceFile, cancellationToken));
+            });
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function getSyntacticDiagnostics(sourceFile, cancellationToken) {
+            return getDiagnosticsHelper(sourceFile, getSyntacticDiagnosticsForFile, cancellationToken);
+        }
+        function getSemanticDiagnostics(sourceFile, cancellationToken) {
+            return getDiagnosticsHelper(sourceFile, getSemanticDiagnosticsForFile, cancellationToken);
+        }
+        function getDeclarationDiagnostics(sourceFile, cancellationToken) {
+            var options = program.getCompilerOptions();
+            // collect diagnostics from the program only once if either no source file was specified or out/outFile is set (bundled emit)
+            if (!sourceFile || options.out || options.outFile) {
+                return getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+            }
+            else {
+                return getDiagnosticsHelper(sourceFile, getDeclarationDiagnosticsForFile, cancellationToken);
+            }
+        }
+        function getSyntacticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return sourceFile.parseDiagnostics;
+        }
+        function runWithCancellationToken(func) {
+            try {
+                return func();
+            }
+            catch (e) {
+                if (e instanceof ts.OperationCanceledException) {
+                    // We were canceled while performing the operation.  Because our type checker
+                    // might be a bad state, we need to throw it away.
+                    //
+                    // Note: we are overly aggressive here.  We do not actually *have* to throw away
+                    // the "noDiagnosticsTypeChecker".  However, for simplicity, i'd like to keep
+                    // the lifetimes of these two TypeCheckers the same.  Also, we generally only
+                    // cancel when the user has made a change anyways.  And, in that case, we (the
+                    // program instance) will get thrown away anyways.  So trying to keep one of
+                    // these type checkers alive doesn't serve much purpose.
+                    noDiagnosticsTypeChecker = undefined;
+                    diagnosticsProducingTypeChecker = undefined;
+                }
+                throw e;
+            }
+        }
+        function getSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var typeChecker = getDiagnosticsProducingTypeChecker();
+                ts.Debug.assert(!!sourceFile.bindDiagnostics);
+                var bindDiagnostics = sourceFile.bindDiagnostics;
+                // For JavaScript files, we don't want to report the normal typescript semantic errors.
+                // Instead, we just report errors for using TypeScript-only constructs from within a
+                // JavaScript file.
+                var checkDiagnostics = ts.isSourceFileJavaScript(sourceFile) ?
+                    getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) :
+                    typeChecker.getDiagnostics(sourceFile, cancellationToken);
+                var fileProcessingDiagnosticsInFile = fileProcessingDiagnostics.getDiagnostics(sourceFile.fileName);
+                var programDiagnosticsInFile = programDiagnostics.getDiagnostics(sourceFile.fileName);
+                return bindDiagnostics.concat(checkDiagnostics).concat(fileProcessingDiagnosticsInFile).concat(programDiagnosticsInFile);
+            });
+        }
+        function getJavaScriptSemanticDiagnosticsForFile(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var diagnostics = [];
+                walk(sourceFile);
+                return diagnostics;
+                function walk(node) {
+                    if (!node) {
+                        return false;
+                    }
+                    switch (node.kind) {
+                        case 229 /* ImportEqualsDeclaration */:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.import_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 235 /* ExportAssignment */:
+                            if (node.isExportEquals) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.export_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 221 /* ClassDeclaration */:
+                            var classDeclaration = node;
+                            if (checkModifiers(classDeclaration.modifiers) ||
+                                checkTypeParameters(classDeclaration.typeParameters)) {
+                                return true;
+                            }
+                            break;
+                        case 251 /* HeritageClause */:
+                            var heritageClause = node;
+                            if (heritageClause.token === 106 /* ImplementsKeyword */) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.implements_clauses_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 222 /* InterfaceDeclaration */:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.interface_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 225 /* ModuleDeclaration */:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.module_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 223 /* TypeAliasDeclaration */:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.type_aliases_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 147 /* MethodDeclaration */:
+                        case 146 /* MethodSignature */:
+                        case 148 /* Constructor */:
+                        case 149 /* GetAccessor */:
+                        case 150 /* SetAccessor */:
+                        case 179 /* FunctionExpression */:
+                        case 220 /* FunctionDeclaration */:
+                        case 180 /* ArrowFunction */:
+                        case 220 /* FunctionDeclaration */:
+                            var functionDeclaration = node;
+                            if (checkModifiers(functionDeclaration.modifiers) ||
+                                checkTypeParameters(functionDeclaration.typeParameters) ||
+                                checkTypeAnnotation(functionDeclaration.type)) {
+                                return true;
+                            }
+                            break;
+                        case 200 /* VariableStatement */:
+                            var variableStatement = node;
+                            if (checkModifiers(variableStatement.modifiers)) {
+                                return true;
+                            }
+                            break;
+                        case 218 /* VariableDeclaration */:
+                            var variableDeclaration = node;
+                            if (checkTypeAnnotation(variableDeclaration.type)) {
+                                return true;
+                            }
+                            break;
+                        case 174 /* CallExpression */:
+                        case 175 /* NewExpression */:
+                            var expression = node;
+                            if (expression.typeArguments && expression.typeArguments.length > 0) {
+                                var start_2 = expression.typeArguments.pos;
+                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_2, expression.typeArguments.end - start_2, ts.Diagnostics.type_arguments_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 142 /* Parameter */:
+                            var parameter = node;
+                            if (parameter.modifiers) {
+                                var start_3 = parameter.modifiers.pos;
+                                diagnostics.push(ts.createFileDiagnostic(sourceFile, start_3, parameter.modifiers.end - start_3, ts.Diagnostics.parameter_modifiers_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            if (parameter.questionToken) {
+                                diagnostics.push(ts.createDiagnosticForNode(parameter.questionToken, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, "?"));
+                                return true;
+                            }
+                            if (parameter.type) {
+                                diagnostics.push(ts.createDiagnosticForNode(parameter.type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
+                                return true;
+                            }
+                            break;
+                        case 145 /* PropertyDeclaration */:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.property_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 224 /* EnumDeclaration */:
+                            diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 177 /* TypeAssertionExpression */:
+                            var typeAssertionExpression = node;
+                            diagnostics.push(ts.createDiagnosticForNode(typeAssertionExpression.type, ts.Diagnostics.type_assertion_expressions_can_only_be_used_in_a_ts_file));
+                            return true;
+                        case 143 /* Decorator */:
+                            if (!options.experimentalDecorators) {
+                                diagnostics.push(ts.createDiagnosticForNode(node, ts.Diagnostics.Experimental_support_for_decorators_is_a_feature_that_is_subject_to_change_in_a_future_release_Set_the_experimentalDecorators_option_to_remove_this_warning));
+                            }
+                            return true;
+                    }
+                    return ts.forEachChild(node, walk);
+                }
+                function checkTypeParameters(typeParameters) {
+                    if (typeParameters) {
+                        var start_4 = typeParameters.pos;
+                        diagnostics.push(ts.createFileDiagnostic(sourceFile, start_4, typeParameters.end - start_4, ts.Diagnostics.type_parameter_declarations_can_only_be_used_in_a_ts_file));
+                        return true;
+                    }
+                    return false;
+                }
+                function checkTypeAnnotation(type) {
+                    if (type) {
+                        diagnostics.push(ts.createDiagnosticForNode(type, ts.Diagnostics.types_can_only_be_used_in_a_ts_file));
+                        return true;
+                    }
+                    return false;
+                }
+                function checkModifiers(modifiers) {
+                    if (modifiers) {
+                        for (var _i = 0, modifiers_1 = modifiers; _i < modifiers_1.length; _i++) {
+                            var modifier = modifiers_1[_i];
+                            switch (modifier.kind) {
+                                case 112 /* PublicKeyword */:
+                                case 110 /* PrivateKeyword */:
+                                case 111 /* ProtectedKeyword */:
+                                case 128 /* ReadonlyKeyword */:
+                                case 122 /* DeclareKeyword */:
+                                    diagnostics.push(ts.createDiagnosticForNode(modifier, ts.Diagnostics._0_can_only_be_used_in_a_ts_file, ts.tokenToString(modifier.kind)));
+                                    return true;
+                                // These are all legal modifiers.
+                                case 113 /* StaticKeyword */:
+                                case 82 /* ExportKeyword */:
+                                case 74 /* ConstKeyword */:
+                                case 77 /* DefaultKeyword */:
+                                case 115 /* AbstractKeyword */:
+                            }
+                        }
+                    }
+                    return false;
+                }
+            });
+        }
+        function getDeclarationDiagnosticsWorker(sourceFile, cancellationToken) {
+            return runWithCancellationToken(function () {
+                var resolver = getDiagnosticsProducingTypeChecker().getEmitResolver(sourceFile, cancellationToken);
+                // Don't actually write any files since we're just getting diagnostics.
+                var writeFile = function () { };
+                return ts.getDeclarationDiagnostics(getEmitHost(writeFile), resolver, sourceFile);
+            });
+        }
+        function getDeclarationDiagnosticsForFile(sourceFile, cancellationToken) {
+            return ts.isDeclarationFile(sourceFile) ? [] : getDeclarationDiagnosticsWorker(sourceFile, cancellationToken);
+        }
+        function getOptionsDiagnostics() {
+            var allDiagnostics = [];
+            ts.addRange(allDiagnostics, fileProcessingDiagnostics.getGlobalDiagnostics());
+            ts.addRange(allDiagnostics, programDiagnostics.getGlobalDiagnostics());
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function getGlobalDiagnostics() {
+            var allDiagnostics = [];
+            ts.addRange(allDiagnostics, getDiagnosticsProducingTypeChecker().getGlobalDiagnostics());
+            return ts.sortAndDeduplicateDiagnostics(allDiagnostics);
+        }
+        function hasExtension(fileName) {
+            return ts.getBaseFileName(fileName).indexOf(".") >= 0;
+        }
+        function processRootFile(fileName, isDefaultLib) {
+            processSourceFile(ts.normalizePath(fileName), isDefaultLib, /*isReference*/ true);
+        }
+        function fileReferenceIsEqualTo(a, b) {
+            return a.fileName === b.fileName;
+        }
+        function moduleNameIsEqualTo(a, b) {
+            return a.text === b.text;
+        }
+        function getTextOfLiteral(literal) {
+            return literal.text;
+        }
+        function collectExternalModuleReferences(file) {
+            if (file.imports) {
+                return;
+            }
+            var isJavaScriptFile = ts.isSourceFileJavaScript(file);
+            var isExternalModuleFile = ts.isExternalModule(file);
+            var imports;
+            var moduleAugmentations;
+            for (var _i = 0, _a = file.statements; _i < _a.length; _i++) {
+                var node = _a[_i];
+                collectModuleReferences(node, /*inAmbientModule*/ false);
+                if (isJavaScriptFile) {
+                    collectRequireCalls(node);
+                }
+            }
+            file.imports = imports || emptyArray;
+            file.moduleAugmentations = moduleAugmentations || emptyArray;
+            return;
+            function collectModuleReferences(node, inAmbientModule) {
+                switch (node.kind) {
+                    case 230 /* ImportDeclaration */:
+                    case 229 /* ImportEqualsDeclaration */:
+                    case 236 /* ExportDeclaration */:
+                        var moduleNameExpr = ts.getExternalModuleName(node);
+                        if (!moduleNameExpr || moduleNameExpr.kind !== 9 /* StringLiteral */) {
+                            break;
+                        }
+                        if (!moduleNameExpr.text) {
+                            break;
+                        }
+                        // TypeScript 1.0 spec (April 2014): 12.1.6
+                        // An ExternalImportDeclaration in an AmbientExternalModuleDeclaration may reference other external modules
+                        // only through top - level external module names. Relative external module names are not permitted.
+                        if (!inAmbientModule || !ts.isExternalModuleNameRelative(moduleNameExpr.text)) {
+                            (imports || (imports = [])).push(moduleNameExpr);
+                        }
+                        break;
+                    case 225 /* ModuleDeclaration */:
+                        if (ts.isAmbientModule(node) && (inAmbientModule || node.flags & 2 /* Ambient */ || ts.isDeclarationFile(file))) {
+                            var moduleName = node.name;
+                            // Ambient module declarations can be interpreted as augmentations for some existing external modules.
+                            // This will happen in two cases:
+                            // - if current file is external module then module augmentation is a ambient module declaration defined in the top level scope
+                            // - if current file is not external module then module augmentation is an ambient module declaration with non-relative module name
+                            //   immediately nested in top level ambient module declaration .
+                            if (isExternalModuleFile || (inAmbientModule && !ts.isExternalModuleNameRelative(moduleName.text))) {
+                                (moduleAugmentations || (moduleAugmentations = [])).push(moduleName);
+                            }
+                            else if (!inAmbientModule) {
+                                // An AmbientExternalModuleDeclaration declares an external module.
+                                // This type of declaration is permitted only in the global module.
+                                // The StringLiteral must specify a top - level external module name.
+                                // Relative external module names are not permitted
+                                // NOTE: body of ambient module is always a module block
+                                for (var _i = 0, _a = node.body.statements; _i < _a.length; _i++) {
+                                    var statement = _a[_i];
+                                    collectModuleReferences(statement, /*inAmbientModule*/ true);
+                                }
+                            }
+                        }
+                }
+            }
+            function collectRequireCalls(node) {
+                if (ts.isRequireCall(node, /*checkArgumentIsStringLiteral*/ true)) {
+                    (imports || (imports = [])).push(node.arguments[0]);
+                }
+                else {
+                    ts.forEachChild(node, collectRequireCalls);
+                }
+            }
+        }
+        /**
+          * 'isReference' indicates whether the file was brought in via a reference directive (rather than an import declaration)
+          */
+        function processSourceFile(fileName, isDefaultLib, isReference, refFile, refPos, refEnd) {
+            var diagnosticArgument;
+            var diagnostic;
+            if (hasExtension(fileName)) {
+                if (!options.allowNonTsExtensions && !ts.forEach(supportedExtensions, function (extension) { return ts.fileExtensionIs(host.getCanonicalFileName(fileName), extension); })) {
+                    diagnostic = ts.Diagnostics.File_0_has_unsupported_extension_The_only_supported_extensions_are_1;
+                    diagnosticArgument = [fileName, "'" + supportedExtensions.join("', '") + "'"];
+                }
+                else if (!findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd)) {
+                    diagnostic = ts.Diagnostics.File_0_not_found;
+                    diagnosticArgument = [fileName];
+                }
+                else if (refFile && host.getCanonicalFileName(fileName) === host.getCanonicalFileName(refFile.fileName)) {
+                    diagnostic = ts.Diagnostics.A_file_cannot_have_a_reference_to_itself;
+                    diagnosticArgument = [fileName];
+                }
+            }
+            else {
+                var nonTsFile = options.allowNonTsExtensions && findSourceFile(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd);
+                if (!nonTsFile) {
+                    if (options.allowNonTsExtensions) {
+                        diagnostic = ts.Diagnostics.File_0_not_found;
+                        diagnosticArgument = [fileName];
+                    }
+                    else if (!ts.forEach(supportedExtensions, function (extension) { return findSourceFile(fileName + extension, ts.toPath(fileName + extension, currentDirectory, getCanonicalFileName), isDefaultLib, isReference, refFile, refPos, refEnd); })) {
+                        diagnostic = ts.Diagnostics.File_0_not_found;
+                        fileName += ".ts";
+                        diagnosticArgument = [fileName];
+                    }
+                }
+            }
+            if (diagnostic) {
+                if (refFile !== undefined && refEnd !== undefined && refPos !== undefined) {
+                    fileProcessingDiagnostics.add(ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, diagnostic].concat(diagnosticArgument)));
+                }
+                else {
+                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic.apply(void 0, [diagnostic].concat(diagnosticArgument)));
+                }
+            }
+        }
+        function reportFileNamesDifferOnlyInCasingError(fileName, existingFileName, refFile, refPos, refEnd) {
+            if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
+            }
+            else {
+                fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_name_0_differs_from_already_included_file_name_1_only_in_casing, fileName, existingFileName));
+            }
+        }
+        // Get source file from normalized fileName
+        function findSourceFile(fileName, path, isDefaultLib, isReference, refFile, refPos, refEnd) {
+            if (filesByName.contains(path)) {
+                var file_1 = filesByName.get(path);
+                // try to check if we've already seen this file but with a different casing in path
+                // NOTE: this only makes sense for case-insensitive file systems
+                if (file_1 && options.forceConsistentCasingInFileNames && ts.getNormalizedAbsolutePath(file_1.fileName, currentDirectory) !== ts.getNormalizedAbsolutePath(fileName, currentDirectory)) {
+                    reportFileNamesDifferOnlyInCasingError(fileName, file_1.fileName, refFile, refPos, refEnd);
+                }
+                return file_1;
+            }
+            // We haven't looked for this file, do so now and cache result
+            var file = host.getSourceFile(fileName, options.target, function (hostErrorMessage) {
+                if (refFile !== undefined && refPos !== undefined && refEnd !== undefined) {
+                    fileProcessingDiagnostics.add(ts.createFileDiagnostic(refFile, refPos, refEnd - refPos, ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
+                }
+                else {
+                    fileProcessingDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, hostErrorMessage));
+                }
+            });
+            filesByName.set(path, file);
+            if (file) {
+                file.path = path;
+                if (host.useCaseSensitiveFileNames()) {
+                    // for case-sensitive file systems check if we've already seen some file with similar filename ignoring case
+                    var existingFile = filesByNameIgnoreCase.get(path);
+                    if (existingFile) {
+                        reportFileNamesDifferOnlyInCasingError(fileName, existingFile.fileName, refFile, refPos, refEnd);
+                    }
+                    else {
+                        filesByNameIgnoreCase.set(path, file);
+                    }
+                }
+                skipDefaultLib = skipDefaultLib || file.hasNoDefaultLib;
+                var basePath = ts.getDirectoryPath(fileName);
+                if (!options.noResolve) {
+                    processReferencedFiles(file, basePath, isDefaultLib);
+                    processTypeReferenceDirectives(file);
+                }
+                // always process imported modules to record module name resolutions
+                processImportedModules(file, basePath);
+                if (isDefaultLib) {
+                    files.unshift(file);
+                }
+                else {
+                    files.push(file);
+                }
+            }
+            return file;
+        }
+        function processReferencedFiles(file, basePath, isDefaultLib) {
+            ts.forEach(file.referencedFiles, function (ref) {
+                var referencedFileName = resolveTripleslashReference(ref.fileName, file.fileName);
+                processSourceFile(referencedFileName, isDefaultLib, /*isReference*/ true, file, ref.pos, ref.end);
+            });
+        }
+        function processTypeReferenceDirectives(file) {
+            var typeDirectives = ts.map(file.typeReferenceDirectives, function (l) { return l.fileName; });
+            var resolutions = resolveTypeReferenceDirectiveNamesWorker(typeDirectives, file.fileName);
+            for (var i = 0; i < typeDirectives.length; i++) {
+                var ref = file.typeReferenceDirectives[i];
+                var resolvedTypeReferenceDirective = resolutions[i];
+                // store resolved type directive on the file
+                ts.setResolvedTypeReferenceDirective(file, ref.fileName, resolvedTypeReferenceDirective);
+                processTypeReferenceDirective(ref.fileName, resolvedTypeReferenceDirective, file, ref.pos, ref.end);
+            }
+        }
+        function processTypeReferenceDirective(typeReferenceDirective, resolvedTypeReferenceDirective, refFile, refPos, refEnd) {
+            // If we already found this library as a primary reference - nothing to do
+            var previousResolution = resolvedTypeReferenceDirectives[typeReferenceDirective];
+            if (previousResolution && previousResolution.primary) {
+                return;
+            }
+            var saveResolution = true;
+            if (resolvedTypeReferenceDirective) {
+                if (resolvedTypeReferenceDirective.primary) {
+                    // resolved from the primary path
+                    processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
+                }
+                else {
+                    // If we already resolved to this file, it must have been a secondary reference. Check file contents
+                    // for sameness and possibly issue an error
+                    if (previousResolution) {
+                        var otherFileText = host.readFile(resolvedTypeReferenceDirective.resolvedFileName);
+                        if (otherFileText !== getSourceFile(previousResolution.resolvedFileName).text) {
+                            fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Conflicting_library_definitions_for_0_found_at_1_and_2_Copy_the_correct_file_to_the_typings_folder_to_resolve_this_conflict, typeReferenceDirective, resolvedTypeReferenceDirective.resolvedFileName, previousResolution.resolvedFileName));
+                        }
+                        // don't overwrite previous resolution result
+                        saveResolution = false;
+                    }
+                    else {
+                        // First resolution of this library
+                        processSourceFile(resolvedTypeReferenceDirective.resolvedFileName, /*isDefaultLib*/ false, /*isReference*/ true, refFile, refPos, refEnd);
+                    }
+                }
+            }
+            else {
+                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, ts.Diagnostics.Cannot_find_name_0, typeReferenceDirective));
+            }
+            if (saveResolution) {
+                resolvedTypeReferenceDirectives[typeReferenceDirective] = resolvedTypeReferenceDirective;
+            }
+        }
+        function createDiagnostic(refFile, refPos, refEnd, message) {
+            var args = [];
+            for (var _i = 4; _i < arguments.length; _i++) {
+                args[_i - 4] = arguments[_i];
+            }
+            if (refFile === undefined || refPos === undefined || refEnd === undefined) {
+                return ts.createCompilerDiagnostic.apply(void 0, [message].concat(args));
+            }
+            else {
+                return ts.createFileDiagnostic.apply(void 0, [refFile, refPos, refEnd - refPos, message].concat(args));
+            }
+        }
+        function getCanonicalFileName(fileName) {
+            return host.getCanonicalFileName(fileName);
+        }
+        function processImportedModules(file, basePath) {
+            collectExternalModuleReferences(file);
+            if (file.imports.length || file.moduleAugmentations.length) {
+                file.resolvedModules = {};
+                var moduleNames = ts.map(ts.concatenate(file.imports, file.moduleAugmentations), getTextOfLiteral);
+                var resolutions = resolveModuleNamesWorker(moduleNames, ts.getNormalizedAbsolutePath(file.fileName, currentDirectory));
+                for (var i = 0; i < moduleNames.length; i++) {
+                    var resolution = resolutions[i];
+                    ts.setResolvedModule(file, moduleNames[i], resolution);
+                    // add file to program only if:
+                    // - resolution was successful
+                    // - noResolve is falsy
+                    // - module name comes from the list of imports
+                    var shouldAddFile = resolution &&
+                        !options.noResolve &&
+                        i < file.imports.length;
+                    if (shouldAddFile) {
+                        findSourceFile(resolution.resolvedFileName, ts.toPath(resolution.resolvedFileName, currentDirectory, getCanonicalFileName), /*isDefaultLib*/ false, /*isReference*/ false, file, ts.skipTrivia(file.text, file.imports[i].pos), file.imports[i].end);
+                    }
+                }
+            }
+            else {
+                // no imports - drop cached module resolutions
+                file.resolvedModules = undefined;
+            }
+            return;
+        }
+        function computeCommonSourceDirectory(sourceFiles) {
+            var fileNames = [];
+            for (var _i = 0, sourceFiles_2 = sourceFiles; _i < sourceFiles_2.length; _i++) {
+                var file = sourceFiles_2[_i];
+                if (!file.isDeclarationFile) {
+                    fileNames.push(file.fileName);
+                }
+            }
+            return computeCommonSourceDirectoryOfFilenames(fileNames, currentDirectory, getCanonicalFileName);
+        }
+        function checkSourceFilesBelongToPath(sourceFiles, rootDirectory) {
+            var allFilesBelongToPath = true;
+            if (sourceFiles) {
+                var absoluteRootDirectoryPath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(rootDirectory, currentDirectory));
+                for (var _i = 0, sourceFiles_3 = sourceFiles; _i < sourceFiles_3.length; _i++) {
+                    var sourceFile = sourceFiles_3[_i];
+                    if (!ts.isDeclarationFile(sourceFile)) {
+                        var absoluteSourceFilePath = host.getCanonicalFileName(ts.getNormalizedAbsolutePath(sourceFile.fileName, currentDirectory));
+                        if (absoluteSourceFilePath.indexOf(absoluteRootDirectoryPath) !== 0) {
+                            programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_is_not_under_rootDir_1_rootDir_is_expected_to_contain_all_source_files, sourceFile.fileName, options.rootDir));
+                            allFilesBelongToPath = false;
+                        }
+                    }
+                }
+            }
+            return allFilesBelongToPath;
+        }
+        function verifyCompilerOptions() {
+            if (options.isolatedModules) {
+                if (options.declaration) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declaration", "isolatedModules"));
+                }
+                if (options.noEmitOnError) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "noEmitOnError", "isolatedModules"));
+                }
+                if (options.out) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "isolatedModules"));
+                }
+                if (options.outFile) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "outFile", "isolatedModules"));
+                }
+            }
+            if (options.inlineSourceMap) {
+                if (options.sourceMap) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "sourceMap", "inlineSourceMap"));
+                }
+                if (options.mapRoot) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "mapRoot", "inlineSourceMap"));
+                }
+            }
+            if (options.paths && options.baseUrl === undefined) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_paths_cannot_be_used_without_specifying_baseUrl_option));
+            }
+            if (options.paths) {
+                for (var key in options.paths) {
+                    if (!ts.hasProperty(options.paths, key)) {
+                        continue;
+                    }
+                    if (!hasZeroOrOneAsteriskCharacter(key)) {
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Pattern_0_can_have_at_most_one_Asterisk_character, key));
+                    }
+                    if (ts.isArray(options.paths[key])) {
+                        for (var _i = 0, _a = options.paths[key]; _i < _a.length; _i++) {
+                            var subst = _a[_i];
+                            var typeOfSubst = typeof subst;
+                            if (typeOfSubst === "string") {
+                                if (!hasZeroOrOneAsteriskCharacter(subst)) {
+                                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_in_pattern_1_in_can_have_at_most_one_Asterisk_character, subst, key));
+                                }
+                            }
+                            else {
+                                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitution_0_for_pattern_1_has_incorrect_type_expected_string_got_2, subst, key, typeOfSubst));
+                            }
+                        }
+                    }
+                    else {
+                        programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Substitutions_for_pattern_0_should_be_an_array, key));
+                    }
+                }
+            }
+            if (!options.sourceMap && !options.inlineSourceMap) {
+                if (options.inlineSources) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "inlineSources"));
+                }
+                if (options.sourceRoot) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_used_when_either_option_inlineSourceMap_or_option_sourceMap_is_provided, "sourceRoot"));
+                }
+            }
+            if (options.out && options.outFile) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "out", "outFile"));
+            }
+            if (options.mapRoot && !options.sourceMap) {
+                // Error to specify --mapRoot without --sourcemap
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "mapRoot", "sourceMap"));
+            }
+            if (options.declarationDir) {
+                if (!options.declaration) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "declarationDir", "declaration"));
+                }
+                if (options.out || options.outFile) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "declarationDir", options.out ? "out" : "outFile"));
+                }
+            }
+            if (options.lib && options.noLib) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "lib", "noLib"));
+            }
+            var languageVersion = options.target || 0 /* ES3 */;
+            var outFile = options.outFile || options.out;
+            var firstExternalModuleSourceFile = ts.forEach(files, function (f) { return ts.isExternalModule(f) ? f : undefined; });
+            if (options.isolatedModules) {
+                if (options.module === ts.ModuleKind.None && languageVersion < 2 /* ES6 */) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_isolatedModules_can_only_be_used_when_either_option_module_is_provided_or_option_target_is_ES2015_or_higher));
+                }
+                var firstNonExternalModuleSourceFile = ts.forEach(files, function (f) { return !ts.isExternalModule(f) && !ts.isDeclarationFile(f) ? f : undefined; });
+                if (firstNonExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstNonExternalModuleSourceFile, firstNonExternalModuleSourceFile);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstNonExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_namespaces_when_the_isolatedModules_flag_is_provided));
+                }
+            }
+            else if (firstExternalModuleSourceFile && languageVersion < 2 /* ES6 */ && options.module === ts.ModuleKind.None) {
+                // We cannot use createDiagnosticFromNode because nodes do not have parents yet
+                var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_use_imports_exports_or_module_augmentations_when_module_is_none));
+            }
+            // Cannot specify module gen target of es6 when below es6
+            if (options.module === ts.ModuleKind.ES6 && languageVersion < 2 /* ES6 */) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_compile_modules_into_es2015_when_targeting_ES5_or_lower));
+            }
+            // Cannot specify module gen that isn't amd or system with --out
+            if (outFile) {
+                if (options.module && !(options.module === ts.ModuleKind.AMD || options.module === ts.ModuleKind.System)) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Only_amd_and_system_modules_are_supported_alongside_0, options.out ? "out" : "outFile"));
+                }
+                else if (options.module === undefined && firstExternalModuleSourceFile) {
+                    var span = ts.getErrorSpanForNode(firstExternalModuleSourceFile, firstExternalModuleSourceFile.externalModuleIndicator);
+                    programDiagnostics.add(ts.createFileDiagnostic(firstExternalModuleSourceFile, span.start, span.length, ts.Diagnostics.Cannot_compile_modules_using_option_0_unless_the_module_flag_is_amd_or_system, options.out ? "out" : "outFile"));
+                }
+            }
+            // there has to be common source directory if user specified --outdir || --sourceRoot
+            // if user specified --mapRoot, there needs to be common source directory if there would be multiple files being emitted
+            if (options.outDir ||
+                options.sourceRoot ||
+                options.mapRoot) {
+                // Precalculate and cache the common source directory
+                var dir = getCommonSourceDirectory();
+                // If we failed to find a good common directory, but outDir is specified and at least one of our files is on a windows drive/URL/other resource, add a failure
+                if (options.outDir && dir === "" && ts.forEach(files, function (file) { return ts.getRootLength(file.fileName) > 1; })) {
+                    programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_find_the_common_subdirectory_path_for_the_input_files));
+                }
+            }
+            if (!options.noEmit && options.allowJs && options.declaration) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_with_option_1, "allowJs", "declaration"));
+            }
+            if (options.emitDecoratorMetadata &&
+                !options.experimentalDecorators) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_cannot_be_specified_without_specifying_option_1, "emitDecoratorMetadata", "experimentalDecorators"));
+            }
+            if (options.reactNamespace && !ts.isIdentifier(options.reactNamespace, languageVersion)) {
+                programDiagnostics.add(ts.createCompilerDiagnostic(ts.Diagnostics.Invalid_value_for_reactNamespace_0_is_not_a_valid_identifier, options.reactNamespace));
+            }
+            // If the emit is enabled make sure that every output file is unique and not overwriting any of the input files
+            if (!options.noEmit && !options.suppressOutputPathCheck) {
+                var emitHost = getEmitHost();
+                var emitFilesSeen_1 = ts.createFileMap(!host.useCaseSensitiveFileNames() ? function (key) { return key.toLocaleLowerCase(); } : undefined);
+                ts.forEachExpectedEmitFile(emitHost, function (emitFileNames, sourceFiles, isBundledEmit) {
+                    verifyEmitFilePath(emitFileNames.jsFilePath, emitFilesSeen_1);
+                    verifyEmitFilePath(emitFileNames.declarationFilePath, emitFilesSeen_1);
+                });
+            }
+            // Verify that all the emit files are unique and don't overwrite input files
+            function verifyEmitFilePath(emitFileName, emitFilesSeen) {
+                if (emitFileName) {
+                    var emitFilePath = ts.toPath(emitFileName, currentDirectory, getCanonicalFileName);
+                    // Report error if the output overwrites input file
+                    if (filesByName.contains(emitFilePath)) {
+                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_overwrite_input_file);
+                    }
+                    // Report error if multiple files write into same file
+                    if (emitFilesSeen.contains(emitFilePath)) {
+                        // Already seen the same emit file - report error
+                        createEmitBlockingDiagnostics(emitFileName, emitFilePath, ts.Diagnostics.Cannot_write_file_0_because_it_would_be_overwritten_by_multiple_input_files);
+                    }
+                    else {
+                        emitFilesSeen.set(emitFilePath, true);
+                    }
+                }
+            }
+        }
+        function createEmitBlockingDiagnostics(emitFileName, emitFilePath, message) {
+            hasEmitBlockingDiagnostics.set(ts.toPath(emitFileName, currentDirectory, getCanonicalFileName), true);
+            programDiagnostics.add(ts.createCompilerDiagnostic(message, emitFileName));
+        }
+    }
+    ts.createProgram = createProgram;
+})(ts || (ts = {}));
+/// <reference path="sys.ts"/>
+/// <reference path="types.ts"/>
+/// <reference path="core.ts"/>
+/// <reference path="diagnosticInformationMap.generated.ts"/>
+/// <reference path="scanner.ts"/>
+var ts;
+(function (ts) {
+    /* @internal */
+    ts.optionDeclarations = [
+        {
+            name: "charset",
+            type: "string"
+        },
+        {
+            name: "declaration",
+            shortName: "d",
+            type: "boolean",
+            description: ts.Diagnostics.Generates_corresponding_d_ts_file
+        },
+        {
+            name: "declarationDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "diagnostics",
+            type: "boolean"
+        },
+        {
+            name: "emitBOM",
+            type: "boolean"
+        },
+        {
+            name: "help",
+            shortName: "h",
+            type: "boolean",
+            description: ts.Diagnostics.Print_this_message
+        },
+        {
+            name: "help",
+            shortName: "?",
+            type: "boolean"
+        },
+        {
+            name: "init",
+            type: "boolean",
+            description: ts.Diagnostics.Initializes_a_TypeScript_project_and_creates_a_tsconfig_json_file
+        },
+        {
+            name: "inlineSourceMap",
+            type: "boolean"
+        },
+        {
+            name: "inlineSources",
+            type: "boolean"
+        },
+        {
+            name: "jsx",
+            type: {
+                "preserve": 1 /* Preserve */,
+                "react": 2 /* React */
+            },
+            paramType: ts.Diagnostics.KIND,
+            description: ts.Diagnostics.Specify_JSX_code_generation_Colon_preserve_or_react
+        },
+        {
+            name: "reactNamespace",
+            type: "string",
+            description: ts.Diagnostics.Specify_the_object_invoked_for_createElement_and_spread_when_targeting_react_JSX_emit
+        },
+        {
+            name: "listFiles",
+            type: "boolean"
+        },
+        {
+            name: "locale",
+            type: "string"
+        },
+        {
+            name: "mapRoot",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_map_files_instead_of_generated_locations,
+            paramType: ts.Diagnostics.LOCATION
+        },
+        {
+            name: "module",
+            shortName: "m",
+            type: {
+                "none": ts.ModuleKind.None,
+                "commonjs": ts.ModuleKind.CommonJS,
+                "amd": ts.ModuleKind.AMD,
+                "system": ts.ModuleKind.System,
+                "umd": ts.ModuleKind.UMD,
+                "es6": ts.ModuleKind.ES6,
+                "es2015": ts.ModuleKind.ES2015
+            },
+            description: ts.Diagnostics.Specify_module_code_generation_Colon_commonjs_amd_system_umd_or_es2015,
+            paramType: ts.Diagnostics.KIND
+        },
+        {
+            name: "newLine",
+            type: {
+                "crlf": 0 /* CarriageReturnLineFeed */,
+                "lf": 1 /* LineFeed */
+            },
+            description: ts.Diagnostics.Specify_the_end_of_line_sequence_to_be_used_when_emitting_files_Colon_CRLF_dos_or_LF_unix,
+            paramType: ts.Diagnostics.NEWLINE
+        },
+        {
+            name: "noEmit",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_outputs
+        },
+        {
+            name: "noEmitHelpers",
+            type: "boolean"
+        },
+        {
+            name: "noEmitOnError",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_outputs_if_any_errors_were_reported
+        },
+        {
+            name: "noImplicitAny",
+            type: "boolean",
+            description: ts.Diagnostics.Raise_error_on_expressions_and_declarations_with_an_implied_any_type
+        },
+        {
+            name: "noImplicitThis",
+            type: "boolean",
+            description: ts.Diagnostics.Raise_error_on_this_expressions_with_an_implied_any_type
+        },
+        {
+            name: "noLib",
+            type: "boolean"
+        },
+        {
+            name: "noResolve",
+            type: "boolean"
+        },
+        {
+            name: "skipDefaultLibCheck",
+            type: "boolean"
+        },
+        {
+            name: "skipLibCheck",
+            type: "boolean",
+            description: ts.Diagnostics.Skip_type_checking_of_declaration_files
+        },
+        {
+            name: "out",
+            type: "string",
+            isFilePath: false,
+            // for correct behaviour, please use outFile
+            paramType: ts.Diagnostics.FILE
+        },
+        {
+            name: "outFile",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Concatenate_and_emit_output_to_single_file,
+            paramType: ts.Diagnostics.FILE
+        },
+        {
+            name: "outDir",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Redirect_output_structure_to_the_directory,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "preserveConstEnums",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_erase_const_enum_declarations_in_generated_code
+        },
+        {
+            name: "pretty",
+            description: ts.Diagnostics.Stylize_errors_and_messages_using_color_and_context_experimental,
+            type: "boolean"
+        },
+        {
+            name: "project",
+            shortName: "p",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Compile_the_project_in_the_given_directory,
+            paramType: ts.Diagnostics.DIRECTORY
+        },
+        {
+            name: "removeComments",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_comments_to_output
+        },
+        {
+            name: "rootDir",
+            type: "string",
+            isFilePath: true,
+            paramType: ts.Diagnostics.LOCATION,
+            description: ts.Diagnostics.Specify_the_root_directory_of_input_files_Use_to_control_the_output_directory_structure_with_outDir
+        },
+        {
+            name: "isolatedModules",
+            type: "boolean"
+        },
+        {
+            name: "sourceMap",
+            type: "boolean",
+            description: ts.Diagnostics.Generates_corresponding_map_file
+        },
+        {
+            name: "sourceRoot",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Specify_the_location_where_debugger_should_locate_TypeScript_files_instead_of_source_locations,
+            paramType: ts.Diagnostics.LOCATION
+        },
+        {
+            name: "suppressExcessPropertyErrors",
+            type: "boolean",
+            description: ts.Diagnostics.Suppress_excess_property_checks_for_object_literals,
+            experimental: true
+        },
+        {
+            name: "suppressImplicitAnyIndexErrors",
+            type: "boolean",
+            description: ts.Diagnostics.Suppress_noImplicitAny_errors_for_indexing_objects_lacking_index_signatures
+        },
+        {
+            name: "stripInternal",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_declarations_for_code_that_has_an_internal_annotation,
+            experimental: true
+        },
+        {
+            name: "target",
+            shortName: "t",
+            type: {
+                "es3": 0 /* ES3 */,
+                "es5": 1 /* ES5 */,
+                "es6": 2 /* ES6 */,
+                "es2015": 2 /* ES2015 */
+            },
+            description: ts.Diagnostics.Specify_ECMAScript_target_version_Colon_ES3_default_ES5_or_ES2015,
+            paramType: ts.Diagnostics.VERSION
+        },
+        {
+            name: "version",
+            shortName: "v",
+            type: "boolean",
+            description: ts.Diagnostics.Print_the_compiler_s_version
+        },
+        {
+            name: "watch",
+            shortName: "w",
+            type: "boolean",
+            description: ts.Diagnostics.Watch_input_files
+        },
+        {
+            name: "experimentalDecorators",
+            type: "boolean",
+            description: ts.Diagnostics.Enables_experimental_support_for_ES7_decorators
+        },
+        {
+            name: "emitDecoratorMetadata",
+            type: "boolean",
+            experimental: true,
+            description: ts.Diagnostics.Enables_experimental_support_for_emitting_type_metadata_for_decorators
+        },
+        {
+            name: "moduleResolution",
+            type: {
+                "node": ts.ModuleResolutionKind.NodeJs,
+                "classic": ts.ModuleResolutionKind.Classic
+            },
+            description: ts.Diagnostics.Specify_module_resolution_strategy_Colon_node_Node_js_or_classic_TypeScript_pre_1_6
+        },
+        {
+            name: "allowUnusedLabels",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_report_errors_on_unused_labels
+        },
+        {
+            name: "noImplicitReturns",
+            type: "boolean",
+            description: ts.Diagnostics.Report_error_when_not_all_code_paths_in_function_return_a_value
+        },
+        {
+            name: "noFallthroughCasesInSwitch",
+            type: "boolean",
+            description: ts.Diagnostics.Report_errors_for_fallthrough_cases_in_switch_statement
+        },
+        {
+            name: "allowUnreachableCode",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_report_errors_on_unreachable_code
+        },
+        {
+            name: "forceConsistentCasingInFileNames",
+            type: "boolean",
+            description: ts.Diagnostics.Disallow_inconsistently_cased_references_to_the_same_file
+        },
+        {
+            name: "baseUrl",
+            type: "string",
+            isFilePath: true,
+            description: ts.Diagnostics.Base_directory_to_resolve_non_absolute_module_names
+        },
+        {
+            // this option can only be specified in tsconfig.json
+            // use type = object to copy the value as-is
+            name: "paths",
+            type: "object",
+            isTSConfigOnly: true
+        },
+        {
+            // this option can only be specified in tsconfig.json
+            // use type = object to copy the value as-is
+            name: "rootDirs",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "rootDirs",
+                type: "string",
+                isFilePath: true
+            }
+        },
+        {
+            name: "typesSearchPaths",
+            type: "list",
+            isTSConfigOnly: true,
+            element: {
+                name: "typesSearchPaths",
+                type: "string",
+                isFilePath: true
+            }
+        },
+        {
+            name: "typesRoot",
+            type: "string"
+        },
+        {
+            name: "types",
+            type: "list",
+            element: {
+                name: "types",
+                type: "string"
+            },
+            description: ts.Diagnostics.Type_declaration_files_to_be_included_in_compilation
+        },
+        {
+            name: "traceResolution",
+            type: "boolean",
+            description: ts.Diagnostics.Enable_tracing_of_the_name_resolution_process
+        },
+        {
+            name: "allowJs",
+            type: "boolean",
+            description: ts.Diagnostics.Allow_javascript_files_to_be_compiled
+        },
+        {
+            name: "allowSyntheticDefaultImports",
+            type: "boolean",
+            description: ts.Diagnostics.Allow_default_imports_from_modules_with_no_default_export_This_does_not_affect_code_emit_just_typechecking
+        },
+        {
+            name: "noImplicitUseStrict",
+            type: "boolean",
+            description: ts.Diagnostics.Do_not_emit_use_strict_directives_in_module_output
+        },
+        {
+            name: "listEmittedFiles",
+            type: "boolean"
+        },
+        {
+            name: "lib",
+            type: "list",
+            element: {
+                name: "lib",
+                type: {
+                    // JavaScript only
+                    "es5": "lib.es5.d.ts",
+                    "es6": "lib.es2015.d.ts",
+                    "es2015": "lib.es2015.d.ts",
+                    "es7": "lib.es2016.d.ts",
+                    "es2016": "lib.es2016.d.ts",
+                    "es2017": "lib.es2017.d.ts",
+                    // Host only
+                    "dom": "lib.dom.d.ts",
+                    "webworker": "lib.webworker.d.ts",
+                    "scripthost": "lib.scripthost.d.ts",
+                    // ES2015 Or ESNext By-feature options
+                    "es2015.core": "lib.es2015.core.d.ts",
+                    "es2015.collection": "lib.es2015.collection.d.ts",
+                    "es2015.generator": "lib.es2015.generator.d.ts",
+                    "es2015.iterable": "lib.es2015.iterable.d.ts",
+                    "es2015.promise": "lib.es2015.promise.d.ts",
+                    "es2015.proxy": "lib.es2015.proxy.d.ts",
+                    "es2015.reflect": "lib.es2015.reflect.d.ts",
+                    "es2015.symbol": "lib.es2015.symbol.d.ts",
+                    "es2015.symbol.wellknown": "lib.es2015.symbol.wellknown.d.ts",
+                    "es2016.array.include": "lib.es2016.array.include.d.ts",
+                    "es2017.object": "lib.es2017.object.d.ts",
+                    "es2017.sharedmemory": "lib.es2017.sharedmemory.d.ts"
+                }
+            },
+            description: ts.Diagnostics.Specify_library_files_to_be_included_in_the_compilation_Colon
+        },
+        {
+            name: "strictNullChecks",
+            type: "boolean",
+            description: ts.Diagnostics.Enable_strict_null_checks
+        }
+    ];
+    /* @internal */
+    ts.typingOptionDeclarations = [
+        {
+            name: "enableAutoDiscovery",
+            type: "boolean"
+        },
+        {
+            name: "include",
+            type: "list",
+            element: {
+                name: "include",
+                type: "string"
+            }
+        },
+        {
+            name: "exclude",
+            type: "list",
+            element: {
+                name: "exclude",
+                type: "string"
+            }
+        }
+    ];
+    var optionNameMapCache;
+    /* @internal */
+    function getOptionNameMap() {
+        if (optionNameMapCache) {
+            return optionNameMapCache;
+        }
+        var optionNameMap = {};
+        var shortOptionNames = {};
+        ts.forEach(ts.optionDeclarations, function (option) {
+            optionNameMap[option.name.toLowerCase()] = option;
+            if (option.shortName) {
+                shortOptionNames[option.shortName] = option.name;
+            }
+        });
+        optionNameMapCache = { optionNameMap: optionNameMap, shortOptionNames: shortOptionNames };
+        return optionNameMapCache;
+    }
+    ts.getOptionNameMap = getOptionNameMap;
+    /* @internal */
+    function createCompilerDiagnosticForInvalidCustomType(opt) {
+        var namesOfType = [];
+        ts.forEachKey(opt.type, function (key) {
+            namesOfType.push(" '" + key + "'");
+        });
+        return ts.createCompilerDiagnostic(ts.Diagnostics.Argument_for_0_option_must_be_Colon_1, "--" + opt.name, namesOfType);
+    }
+    ts.createCompilerDiagnosticForInvalidCustomType = createCompilerDiagnosticForInvalidCustomType;
+    /* @internal */
+    function parseCustomTypeOption(opt, value, errors) {
+        var key = trimString((value || "")).toLowerCase();
+        var map = opt.type;
+        if (ts.hasProperty(map, key)) {
+            return map[key];
+        }
+        else {
+            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
+        }
+    }
+    ts.parseCustomTypeOption = parseCustomTypeOption;
+    /* @internal */
+    function parseListTypeOption(opt, value, errors) {
+        var values = trimString((value || "")).split(",");
+        switch (opt.element.type) {
+            case "number":
+                return ts.map(values, parseInt);
+            case "string":
+                return ts.map(values, function (v) { return v || ""; });
+            default:
+                return ts.filter(ts.map(values, function (v) { return parseCustomTypeOption(opt.element, v, errors); }), function (v) { return !!v; });
+        }
+    }
+    ts.parseListTypeOption = parseListTypeOption;
+    /* @internal */
+    function parseCommandLine(commandLine, readFile) {
+        var options = {};
+        var fileNames = [];
+        var errors = [];
+        var _a = getOptionNameMap(), optionNameMap = _a.optionNameMap, shortOptionNames = _a.shortOptionNames;
+        parseStrings(commandLine);
+        return {
+            options: options,
+            fileNames: fileNames,
+            errors: errors
+        };
+        function parseStrings(args) {
+            var i = 0;
+            while (i < args.length) {
+                var s = args[i];
+                i++;
+                if (s.charCodeAt(0) === 64 /* at */) {
+                    parseResponseFile(s.slice(1));
+                }
+                else if (s.charCodeAt(0) === 45 /* minus */) {
+                    s = s.slice(s.charCodeAt(1) === 45 /* minus */ ? 2 : 1).toLowerCase();
+                    // Try to translate short option names to their full equivalents.
+                    if (ts.hasProperty(shortOptionNames, s)) {
+                        s = shortOptionNames[s];
+                    }
+                    if (ts.hasProperty(optionNameMap, s)) {
+                        var opt = optionNameMap[s];
+                        if (opt.isTSConfigOnly) {
+                            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Option_0_can_only_be_specified_in_tsconfig_json_file, opt.name));
+                        }
+                        else {
+                            // Check to see if no argument was provided (e.g. "--locale" is the last command-line argument).
+                            if (!args[i] && opt.type !== "boolean") {
+                                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_expects_an_argument, opt.name));
+                            }
+                            switch (opt.type) {
+                                case "number":
+                                    options[opt.name] = parseInt(args[i]);
+                                    i++;
+                                    break;
+                                case "boolean":
+                                    options[opt.name] = true;
+                                    break;
+                                case "string":
+                                    options[opt.name] = args[i] || "";
+                                    i++;
+                                    break;
+                                case "list":
+                                    options[opt.name] = parseListTypeOption(opt, args[i], errors);
+                                    i++;
+                                    break;
+                                // If not a primitive, the possible types are specified in what is effectively a map of options.
+                                default:
+                                    options[opt.name] = parseCustomTypeOption(opt, args[i], errors);
+                                    i++;
+                                    break;
+                            }
+                        }
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_compiler_option_0, s));
+                    }
+                }
+                else {
+                    fileNames.push(s);
+                }
+            }
+        }
+        function parseResponseFile(fileName) {
+            var text = readFile ? readFile(fileName) : ts.sys.readFile(fileName);
+            if (!text) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.File_0_not_found, fileName));
+                return;
+            }
+            var args = [];
+            var pos = 0;
+            while (true) {
+                while (pos < text.length && text.charCodeAt(pos) <= 32 /* space */)
+                    pos++;
+                if (pos >= text.length)
+                    break;
+                var start = pos;
+                if (text.charCodeAt(start) === 34 /* doubleQuote */) {
+                    pos++;
+                    while (pos < text.length && text.charCodeAt(pos) !== 34 /* doubleQuote */)
+                        pos++;
+                    if (pos < text.length) {
+                        args.push(text.substring(start + 1, pos));
+                        pos++;
+                    }
+                    else {
+                        errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unterminated_quoted_string_in_response_file_0, fileName));
+                    }
+                }
+                else {
+                    while (text.charCodeAt(pos) > 32 /* space */)
+                        pos++;
+                    args.push(text.substring(start, pos));
+                }
+            }
+            parseStrings(args);
+        }
+    }
+    ts.parseCommandLine = parseCommandLine;
+    /**
+      * Read tsconfig.json file
+      * @param fileName The path to the config file
+      */
+    function readConfigFile(fileName, readFile) {
+        var text = "";
+        try {
+            text = readFile(fileName);
+        }
+        catch (e) {
+            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Cannot_read_file_0_Colon_1, fileName, e.message) };
+        }
+        return parseConfigFileTextToJson(fileName, text);
+    }
+    ts.readConfigFile = readConfigFile;
+    /**
+      * Parse the text of the tsconfig.json file
+      * @param fileName The path to the config file
+      * @param jsonText The text of the config file
+      */
+    function parseConfigFileTextToJson(fileName, jsonText) {
+        try {
+            var jsonTextWithoutComments = removeComments(jsonText);
+            return { config: /\S/.test(jsonTextWithoutComments) ? JSON.parse(jsonTextWithoutComments) : {} };
+        }
+        catch (e) {
+            return { error: ts.createCompilerDiagnostic(ts.Diagnostics.Failed_to_parse_file_0_Colon_1, fileName, e.message) };
+        }
+    }
+    ts.parseConfigFileTextToJson = parseConfigFileTextToJson;
+    /**
+     * Remove the comments from a json like text.
+     * Comments can be single line comments (starting with # or //) or multiline comments using / * * /
+     *
+     * This method replace comment content by whitespace rather than completely remove them to keep positions in json parsing error reporting accurate.
+     */
+    function removeComments(jsonText) {
+        var output = "";
+        var scanner = ts.createScanner(1 /* ES5 */, /* skipTrivia */ false, 0 /* Standard */, jsonText);
+        var token;
+        while ((token = scanner.scan()) !== 1 /* EndOfFileToken */) {
+            switch (token) {
+                case 2 /* SingleLineCommentTrivia */:
+                case 3 /* MultiLineCommentTrivia */:
+                    // replace comments with whitespace to preserve original character positions
+                    output += scanner.getTokenText().replace(/\S/g, " ");
+                    break;
+                default:
+                    output += scanner.getTokenText();
+                    break;
+            }
+        }
+        return output;
+    }
+    // Skip over any minified JavaScript files (ending in ".min.js")
+    // Skip over dotted files and folders as well
+    var IgnoreFileNamePattern = /(\.min\.js$)|([\\/]\.[\w.])/;
+    /**
+      * Parse the contents of a config file (tsconfig.json).
+      * @param json The contents of the config file to parse
+      * @param host Instance of ParseConfigHost used to enumerate files in folder.
+      * @param basePath A root directory to resolve relative path entries in the config
+      *    file to. e.g. outDir
+      */
+    function parseJsonConfigFileContent(json, host, basePath, existingOptions, configFileName) {
+        if (existingOptions === void 0) { existingOptions = {}; }
+        var errors = [];
+        var compilerOptions = convertCompilerOptionsFromJsonWorker(json["compilerOptions"], basePath, errors, configFileName);
+        var options = ts.extend(existingOptions, compilerOptions);
+        var typingOptions = convertTypingOptionsFromJsonWorker(json["typingOptions"], basePath, errors, configFileName);
+        options.configFilePath = configFileName;
+        var fileNames = getFileNames(errors);
+        return {
+            options: options,
+            fileNames: fileNames,
+            typingOptions: typingOptions,
+            raw: json,
+            errors: errors
+        };
+        function getFileNames(errors) {
+            var fileNames = [];
+            if (ts.hasProperty(json, "files")) {
+                if (ts.isArray(json["files"])) {
+                    fileNames = ts.map(json["files"], function (s) { return ts.combinePaths(basePath, s); });
+                }
+                else {
+                    errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, "files", "Array"));
+                }
+            }
+            else {
+                var filesSeen = {};
+                var exclude = [];
+                if (ts.isArray(json["exclude"])) {
+                    exclude = json["exclude"];
+                }
+                else {
+                    // by default exclude node_modules, and any specificied output directory
+                    exclude = ["node_modules", "bower_components", "jspm_packages"];
+                }
+                var outDir = json["compilerOptions"] && json["compilerOptions"]["outDir"];
+                if (outDir) {
+                    exclude.push(outDir);
+                }
+                exclude = ts.map(exclude, function (e) { return ts.getNormalizedAbsolutePath(e, basePath); });
+                var supportedExtensions = ts.getSupportedExtensions(options);
+                ts.Debug.assert(ts.indexOf(supportedExtensions, ".ts") < ts.indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
+                // Get files of supported extensions in their order of resolution
+                for (var _i = 0, supportedExtensions_1 = supportedExtensions; _i < supportedExtensions_1.length; _i++) {
+                    var extension = supportedExtensions_1[_i];
+                    var filesInDirWithExtension = host.readDirectory(basePath, extension, exclude);
+                    for (var _a = 0, filesInDirWithExtension_1 = filesInDirWithExtension; _a < filesInDirWithExtension_1.length; _a++) {
+                        var fileName = filesInDirWithExtension_1[_a];
+                        // .ts extension would read the .d.ts extension files too but since .d.ts is lower priority extension,
+                        // lets pick them when its turn comes up
+                        if (extension === ".ts" && ts.fileExtensionIs(fileName, ".d.ts")) {
+                            continue;
+                        }
+                        if (IgnoreFileNamePattern.test(fileName)) {
+                            continue;
+                        }
+                        // If this is one of the output extension (which would be .d.ts and .js if we are allowing compilation of js files)
+                        // do not include this file if we included .ts or .tsx file with same base name as it could be output of the earlier compilation
+                        if (extension === ".d.ts" || (options.allowJs && ts.contains(ts.supportedJavascriptExtensions, extension))) {
+                            var baseName = fileName.substr(0, fileName.length - extension.length);
+                            if (ts.hasProperty(filesSeen, baseName + ".ts") || ts.hasProperty(filesSeen, baseName + ".tsx")) {
+                                continue;
+                            }
+                        }
+                        filesSeen[fileName] = true;
+                        fileNames.push(fileName);
+                    }
+                }
+            }
+            if (ts.hasProperty(json, "excludes") && !ts.hasProperty(json, "exclude")) {
+                errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Unknown_option_excludes_Did_you_mean_exclude));
+            }
+            return fileNames;
+        }
+    }
+    ts.parseJsonConfigFileContent = parseJsonConfigFileContent;
+    function convertCompilerOptionsFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertCompilerOptionsFromJson = convertCompilerOptionsFromJson;
+    function convertTypingOptionsFromJson(jsonOptions, basePath, configFileName) {
+        var errors = [];
+        var options = convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName);
+        return { options: options, errors: errors };
+    }
+    ts.convertTypingOptionsFromJson = convertTypingOptionsFromJson;
+    function convertCompilerOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = ts.getBaseFileName(configFileName) === "jsconfig.json" ? { allowJs: true } : {};
+        convertOptionsFromJson(ts.optionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_compiler_option_0, errors);
+        return options;
+    }
+    function convertTypingOptionsFromJsonWorker(jsonOptions, basePath, errors, configFileName) {
+        var options = ts.getBaseFileName(configFileName) === "jsconfig.json"
+            ? { enableAutoDiscovery: true, include: [], exclude: [] }
+            : { enableAutoDiscovery: false, include: [], exclude: [] };
+        convertOptionsFromJson(ts.typingOptionDeclarations, jsonOptions, basePath, options, ts.Diagnostics.Unknown_typing_option_0, errors);
+        return options;
+    }
+    function convertOptionsFromJson(optionDeclarations, jsonOptions, basePath, defaultOptions, diagnosticMessage, errors) {
+        if (!jsonOptions) {
+            return;
+        }
+        var optionNameMap = ts.arrayToMap(optionDeclarations, function (opt) { return opt.name; });
+        for (var id in jsonOptions) {
+            if (ts.hasProperty(optionNameMap, id)) {
+                var opt = optionNameMap[id];
+                defaultOptions[opt.name] = convertJsonOption(opt, jsonOptions[id], basePath, errors);
+            }
+            else {
+                errors.push(ts.createCompilerDiagnostic(diagnosticMessage, id));
+            }
+        }
+    }
+    function convertJsonOption(opt, value, basePath, errors) {
+        var optType = opt.type;
+        var expectedType = typeof optType === "string" ? optType : "string";
+        if (optType === "list" && ts.isArray(value)) {
+            return convertJsonOptionOfListType(opt, value, basePath, errors);
+        }
+        else if (typeof value === expectedType) {
+            if (typeof optType !== "string") {
+                return convertJsonOptionOfCustomType(opt, value, errors);
+            }
+            else {
+                if (opt.isFilePath) {
+                    value = ts.normalizePath(ts.combinePaths(basePath, value));
+                    if (value === "") {
+                        value = ".";
+                    }
+                }
+            }
+            return value;
+        }
+        else {
+            errors.push(ts.createCompilerDiagnostic(ts.Diagnostics.Compiler_option_0_requires_a_value_of_type_1, opt.name, expectedType));
+        }
+    }
+    function convertJsonOptionOfCustomType(opt, value, errors) {
+        var key = value.toLowerCase();
+        if (ts.hasProperty(opt.type, key)) {
+            return opt.type[key];
+        }
+        else {
+            errors.push(createCompilerDiagnosticForInvalidCustomType(opt));
+        }
+    }
+    function convertJsonOptionOfListType(option, values, basePath, errors) {
+        return ts.filter(ts.map(values, function (v) { return convertJsonOption(option.element, v, basePath, errors); }), function (v) { return !!v; });
+    }
+    function trimString(s) {
+        return typeof s.trim === "function" ? s.trim() : s.replace(/^[\s]+|[\s]+$/g, "");
+    }
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var OutliningElementsCollector;
+    (function (OutliningElementsCollector) {
+        function collectElements(sourceFile) {
+            var elements = [];
+            var collapseText = "...";
+            function addOutliningSpan(hintSpanNode, startElement, endElement, autoCollapse) {
+                if (hintSpanNode && startElement && endElement) {
+                    var span = {
+                        textSpan: ts.createTextSpanFromBounds(startElement.pos, endElement.end),
+                        hintSpan: ts.createTextSpanFromBounds(hintSpanNode.getStart(), hintSpanNode.end),
+                        bannerText: collapseText,
+                        autoCollapse: autoCollapse
+                    };
+                    elements.push(span);
+                }
+            }
+            function addOutliningSpanComments(commentSpan, autoCollapse) {
+                if (commentSpan) {
+                    var span = {
+                        textSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
+                        hintSpan: ts.createTextSpanFromBounds(commentSpan.pos, commentSpan.end),
+                        bannerText: collapseText,
+                        autoCollapse: autoCollapse
+                    };
+                    elements.push(span);
+                }
+            }
+            function addOutliningForLeadingCommentsForNode(n) {
+                var comments = ts.getLeadingCommentRangesOfNode(n, sourceFile);
+                if (comments) {
+                    var firstSingleLineCommentStart = -1;
+                    var lastSingleLineCommentEnd = -1;
+                    var isFirstSingleLineComment = true;
+                    var singleLineCommentCount = 0;
+                    for (var _i = 0, comments_2 = comments; _i < comments_2.length; _i++) {
+                        var currentComment = comments_2[_i];
+                        // For single line comments, combine consecutive ones (2 or more) into
+                        // a single span from the start of the first till the end of the last
+                        if (currentComment.kind === 2 /* SingleLineCommentTrivia */) {
+                            if (isFirstSingleLineComment) {
+                                firstSingleLineCommentStart = currentComment.pos;
+                            }
+                            isFirstSingleLineComment = false;
+                            lastSingleLineCommentEnd = currentComment.end;
+                            singleLineCommentCount++;
+                        }
+                        else if (currentComment.kind === 3 /* MultiLineCommentTrivia */) {
+                            combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
+                            addOutliningSpanComments(currentComment, /*autoCollapse*/ false);
+                            singleLineCommentCount = 0;
+                            lastSingleLineCommentEnd = -1;
+                            isFirstSingleLineComment = true;
+                        }
+                    }
+                    combineAndAddMultipleSingleLineComments(singleLineCommentCount, firstSingleLineCommentStart, lastSingleLineCommentEnd);
+                }
+            }
+            function combineAndAddMultipleSingleLineComments(count, start, end) {
+                // Only outline spans of two or more consecutive single line comments
+                if (count > 1) {
+                    var multipleSingleLineComments = {
+                        pos: start,
+                        end: end,
+                        kind: 2 /* SingleLineCommentTrivia */
+                    };
+                    addOutliningSpanComments(multipleSingleLineComments, /*autoCollapse*/ false);
+                }
+            }
+            function autoCollapse(node) {
+                return ts.isFunctionBlock(node) && node.parent.kind !== 180 /* ArrowFunction */;
+            }
+            var depth = 0;
+            var maxDepth = 20;
+            function walk(n) {
+                if (depth > maxDepth) {
+                    return;
+                }
+                if (ts.isDeclaration(n)) {
+                    addOutliningForLeadingCommentsForNode(n);
+                }
+                switch (n.kind) {
+                    case 199 /* Block */:
+                        if (!ts.isFunctionBlock(n)) {
+                            var parent_14 = n.parent;
+                            var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
+                            var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
+                            // Check if the block is standalone, or 'attached' to some parent statement.
+                            // If the latter, we want to collapse the block, but consider its hint span
+                            // to be the entire span of the parent.
+                            if (parent_14.kind === 204 /* DoStatement */ ||
+                                parent_14.kind === 207 /* ForInStatement */ ||
+                                parent_14.kind === 208 /* ForOfStatement */ ||
+                                parent_14.kind === 206 /* ForStatement */ ||
+                                parent_14.kind === 203 /* IfStatement */ ||
+                                parent_14.kind === 205 /* WhileStatement */ ||
+                                parent_14.kind === 212 /* WithStatement */ ||
+                                parent_14.kind === 252 /* CatchClause */) {
+                                addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
+                                break;
+                            }
+                            if (parent_14.kind === 216 /* TryStatement */) {
+                                // Could be the try-block, or the finally-block.
+                                var tryStatement = parent_14;
+                                if (tryStatement.tryBlock === n) {
+                                    addOutliningSpan(parent_14, openBrace, closeBrace, autoCollapse(n));
+                                    break;
+                                }
+                                else if (tryStatement.finallyBlock === n) {
+                                    var finallyKeyword = ts.findChildOfKind(tryStatement, 85 /* FinallyKeyword */, sourceFile);
+                                    if (finallyKeyword) {
+                                        addOutliningSpan(finallyKeyword, openBrace, closeBrace, autoCollapse(n));
+                                        break;
+                                    }
+                                }
+                            }
+                            // Block was a standalone block.  In this case we want to only collapse
+                            // the span of the block, independent of any parent span.
+                            var span = ts.createTextSpanFromBounds(n.getStart(), n.end);
+                            elements.push({
+                                textSpan: span,
+                                hintSpan: span,
+                                bannerText: collapseText,
+                                autoCollapse: autoCollapse(n)
+                            });
+                            break;
+                        }
+                    // Fallthrough.
+                    case 226 /* ModuleBlock */: {
+                        var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
+                        var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
+                        addOutliningSpan(n.parent, openBrace, closeBrace, autoCollapse(n));
+                        break;
+                    }
+                    case 221 /* ClassDeclaration */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 171 /* ObjectLiteralExpression */:
+                    case 227 /* CaseBlock */: {
+                        var openBrace = ts.findChildOfKind(n, 15 /* OpenBraceToken */, sourceFile);
+                        var closeBrace = ts.findChildOfKind(n, 16 /* CloseBraceToken */, sourceFile);
+                        addOutliningSpan(n, openBrace, closeBrace, autoCollapse(n));
+                        break;
+                    }
+                    case 170 /* ArrayLiteralExpression */:
+                        var openBracket = ts.findChildOfKind(n, 19 /* OpenBracketToken */, sourceFile);
+                        var closeBracket = ts.findChildOfKind(n, 20 /* CloseBracketToken */, sourceFile);
+                        addOutliningSpan(n, openBracket, closeBracket, autoCollapse(n));
+                        break;
+                }
+                depth++;
+                ts.forEachChild(n, walk);
+                depth--;
+            }
+            walk(sourceFile);
+            return elements;
+        }
+        OutliningElementsCollector.collectElements = collectElements;
+    })(OutliningElementsCollector = ts.OutliningElementsCollector || (ts.OutliningElementsCollector = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    var NavigateTo;
+    (function (NavigateTo) {
+        function getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount) {
+            var patternMatcher = ts.createPatternMatcher(searchValue);
+            var rawItems = [];
+            // This means "compare in a case insensitive manner."
+            var baseSensitivity = { sensitivity: "base" };
+            // Search the declarations in all files and output matched NavigateToItem into array of NavigateToItem[]
+            ts.forEach(program.getSourceFiles(), function (sourceFile) {
+                cancellationToken.throwIfCancellationRequested();
+                var nameToDeclarations = sourceFile.getNamedDeclarations();
+                for (var name_35 in nameToDeclarations) {
+                    var declarations = ts.getProperty(nameToDeclarations, name_35);
+                    if (declarations) {
+                        // First do a quick check to see if the name of the declaration matches the
+                        // last portion of the (possibly) dotted name they're searching for.
+                        var matches = patternMatcher.getMatchesForLastSegmentOfPattern(name_35);
+                        if (!matches) {
+                            continue;
+                        }
+                        for (var _i = 0, declarations_7 = declarations; _i < declarations_7.length; _i++) {
+                            var declaration = declarations_7[_i];
+                            // It was a match!  If the pattern has dots in it, then also see if the
+                            // declaration container matches as well.
+                            if (patternMatcher.patternContainsDots) {
+                                var containers = getContainers(declaration);
+                                if (!containers) {
+                                    return undefined;
+                                }
+                                matches = patternMatcher.getMatches(containers, name_35);
+                                if (!matches) {
+                                    continue;
+                                }
+                            }
+                            var fileName = sourceFile.fileName;
+                            var matchKind = bestMatchKind(matches);
+                            rawItems.push({ name: name_35, fileName: fileName, matchKind: matchKind, isCaseSensitive: allMatchesAreCaseSensitive(matches), declaration: declaration });
+                        }
+                    }
+                }
+            });
+            // Remove imports when the imported declaration is already in the list and has the same name.
+            rawItems = ts.filter(rawItems, function (item) {
+                var decl = item.declaration;
+                if (decl.kind === 231 /* ImportClause */ || decl.kind === 234 /* ImportSpecifier */ || decl.kind === 229 /* ImportEqualsDeclaration */) {
+                    var importer = checker.getSymbolAtLocation(decl.name);
+                    var imported = checker.getAliasedSymbol(importer);
+                    return importer.name !== imported.name;
+                }
+                else {
+                    return true;
+                }
+            });
+            rawItems.sort(compareNavigateToItems);
+            if (maxResultCount !== undefined) {
+                rawItems = rawItems.slice(0, maxResultCount);
+            }
+            var items = ts.map(rawItems, createNavigateToItem);
+            return items;
+            function allMatchesAreCaseSensitive(matches) {
+                ts.Debug.assert(matches.length > 0);
+                // This is a case sensitive match, only if all the submatches were case sensitive.
+                for (var _i = 0, matches_1 = matches; _i < matches_1.length; _i++) {
+                    var match = matches_1[_i];
+                    if (!match.isCaseSensitive) {
+                        return false;
+                    }
+                }
+                return true;
+            }
+            function getTextOfIdentifierOrLiteral(node) {
+                if (node) {
+                    if (node.kind === 69 /* Identifier */ ||
+                        node.kind === 9 /* StringLiteral */ ||
+                        node.kind === 8 /* NumericLiteral */) {
+                        return node.text;
+                    }
+                }
+                return undefined;
+            }
+            function tryAddSingleDeclarationName(declaration, containers) {
+                if (declaration && declaration.name) {
+                    var text = getTextOfIdentifierOrLiteral(declaration.name);
+                    if (text !== undefined) {
+                        containers.unshift(text);
+                    }
+                    else if (declaration.name.kind === 140 /* ComputedPropertyName */) {
+                        return tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ true);
+                    }
+                    else {
+                        // Don't know how to add this.
+                        return false;
+                    }
+                }
+                return true;
+            }
+            // Only added the names of computed properties if they're simple dotted expressions, like:
+            //
+            //      [X.Y.Z]() { }
+            function tryAddComputedPropertyName(expression, containers, includeLastPortion) {
+                var text = getTextOfIdentifierOrLiteral(expression);
+                if (text !== undefined) {
+                    if (includeLastPortion) {
+                        containers.unshift(text);
+                    }
+                    return true;
+                }
+                if (expression.kind === 172 /* PropertyAccessExpression */) {
+                    var propertyAccess = expression;
+                    if (includeLastPortion) {
+                        containers.unshift(propertyAccess.name.text);
+                    }
+                    return tryAddComputedPropertyName(propertyAccess.expression, containers, /*includeLastPortion*/ true);
+                }
+                return false;
+            }
+            function getContainers(declaration) {
+                var containers = [];
+                // First, if we started with a computed property name, then add all but the last
+                // portion into the container array.
+                if (declaration.name.kind === 140 /* ComputedPropertyName */) {
+                    if (!tryAddComputedPropertyName(declaration.name.expression, containers, /*includeLastPortion*/ false)) {
+                        return undefined;
+                    }
+                }
+                // Now, walk up our containers, adding all their names to the container array.
+                declaration = ts.getContainerNode(declaration);
+                while (declaration) {
+                    if (!tryAddSingleDeclarationName(declaration, containers)) {
+                        return undefined;
+                    }
+                    declaration = ts.getContainerNode(declaration);
+                }
+                return containers;
+            }
+            function bestMatchKind(matches) {
+                ts.Debug.assert(matches.length > 0);
+                var bestMatchKind = ts.PatternMatchKind.camelCase;
+                for (var _i = 0, matches_2 = matches; _i < matches_2.length; _i++) {
+                    var match = matches_2[_i];
+                    var kind = match.kind;
+                    if (kind < bestMatchKind) {
+                        bestMatchKind = kind;
+                    }
+                }
+                return bestMatchKind;
+            }
+            function compareNavigateToItems(i1, i2) {
+                // TODO(cyrusn): get the gamut of comparisons that VS already uses here.
+                // Right now we just sort by kind first, and then by name of the item.
+                // We first sort case insensitively.  So "Aaa" will come before "bar".
+                // Then we sort case sensitively, so "aaa" will come before "Aaa".
+                return i1.matchKind - i2.matchKind ||
+                    i1.name.localeCompare(i2.name, undefined, baseSensitivity) ||
+                    i1.name.localeCompare(i2.name);
+            }
+            function createNavigateToItem(rawItem) {
+                var declaration = rawItem.declaration;
+                var container = ts.getContainerNode(declaration);
+                return {
+                    name: rawItem.name,
+                    kind: ts.getNodeKind(declaration),
+                    kindModifiers: ts.getNodeModifiers(declaration),
+                    matchKind: ts.PatternMatchKind[rawItem.matchKind],
+                    isCaseSensitive: rawItem.isCaseSensitive,
+                    fileName: rawItem.fileName,
+                    textSpan: ts.createTextSpanFromBounds(declaration.getStart(), declaration.getEnd()),
+                    // TODO(jfreeman): What should be the containerName when the container has a computed name?
+                    containerName: container && container.name ? container.name.text : "",
+                    containerKind: container && container.name ? ts.getNodeKind(container) : ""
+                };
+            }
+        }
+        NavigateTo.getNavigateToItems = getNavigateToItems;
+    })(NavigateTo = ts.NavigateTo || (ts.NavigateTo = {}));
+})(ts || (ts = {}));
+/// <reference path='services.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var NavigationBar;
+    (function (NavigationBar) {
+        function getNavigationBarItems(sourceFile, compilerOptions) {
+            // TODO: Handle JS files differently in 'navbar' calls for now, but ideally we should unify
+            // the 'navbar' and 'navto' logic for TypeScript and JavaScript.
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                return getJsNavigationBarItems(sourceFile, compilerOptions);
+            }
+            return getItemsWorker(getTopLevelNodes(sourceFile), createTopLevelItem);
+            function getIndent(node) {
+                var indent = 1; // Global node is the only one with indent 0.
+                var current = node.parent;
+                while (current) {
+                    switch (current.kind) {
+                        case 225 /* ModuleDeclaration */:
+                            // If we have a module declared as A.B.C, it is more "intuitive"
+                            // to say it only has a single layer of depth
+                            do {
+                                current = current.parent;
+                            } while (current.kind === 225 /* ModuleDeclaration */);
+                        // fall through
+                        case 221 /* ClassDeclaration */:
+                        case 224 /* EnumDeclaration */:
+                        case 222 /* InterfaceDeclaration */:
+                        case 220 /* FunctionDeclaration */:
+                            indent++;
+                    }
+                    current = current.parent;
+                }
+                return indent;
+            }
+            function getChildNodes(nodes) {
+                var childNodes = [];
+                function visit(node) {
+                    switch (node.kind) {
+                        case 200 /* VariableStatement */:
+                            ts.forEach(node.declarationList.declarations, visit);
+                            break;
+                        case 167 /* ObjectBindingPattern */:
+                        case 168 /* ArrayBindingPattern */:
+                            ts.forEach(node.elements, visit);
+                            break;
+                        case 236 /* ExportDeclaration */:
+                            // Handle named exports case e.g.:
+                            //    export {a, b as B} from "mod";
+                            if (node.exportClause) {
+                                ts.forEach(node.exportClause.elements, visit);
+                            }
+                            break;
+                        case 230 /* ImportDeclaration */:
+                            var importClause = node.importClause;
+                            if (importClause) {
+                                // Handle default import case e.g.:
+                                //    import d from "mod";
+                                if (importClause.name) {
+                                    childNodes.push(importClause);
+                                }
+                                // Handle named bindings in imports e.g.:
+                                //    import * as NS from "mod";
+                                //    import {a, b as B} from "mod";
+                                if (importClause.namedBindings) {
+                                    if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                                        childNodes.push(importClause.namedBindings);
+                                    }
+                                    else {
+                                        ts.forEach(importClause.namedBindings.elements, visit);
+                                    }
+                                }
+                            }
+                            break;
+                        case 169 /* BindingElement */:
+                        case 218 /* VariableDeclaration */:
+                            if (ts.isBindingPattern(node.name)) {
+                                visit(node.name);
+                                break;
+                            }
+                        // Fall through
+                        case 221 /* ClassDeclaration */:
+                        case 224 /* EnumDeclaration */:
+                        case 222 /* InterfaceDeclaration */:
+                        case 225 /* ModuleDeclaration */:
+                        case 220 /* FunctionDeclaration */:
+                        case 229 /* ImportEqualsDeclaration */:
+                        case 234 /* ImportSpecifier */:
+                        case 238 /* ExportSpecifier */:
+                        case 223 /* TypeAliasDeclaration */:
+                            childNodes.push(node);
+                            break;
+                    }
+                }
+                // for (let i = 0, n = nodes.length; i < n; i++) {
+                //    let node = nodes[i];
+                //    if (node.kind === SyntaxKind.ClassDeclaration ||
+                //        node.kind === SyntaxKind.EnumDeclaration ||
+                //        node.kind === SyntaxKind.InterfaceDeclaration ||
+                //        node.kind === SyntaxKind.ModuleDeclaration ||
+                //        node.kind === SyntaxKind.FunctionDeclaration) {
+                //        childNodes.push(node);
+                //    }
+                //    else if (node.kind === SyntaxKind.VariableStatement) {
+                //        childNodes.push.apply(childNodes, (<VariableStatement>node).declarations);
+                //    }
+                // }
+                ts.forEach(nodes, visit);
+                return sortNodes(childNodes);
+            }
+            function getTopLevelNodes(node) {
+                var topLevelNodes = [];
+                topLevelNodes.push(node);
+                addTopLevelNodes(node.statements, topLevelNodes);
+                return topLevelNodes;
+            }
+            function sortNodes(nodes) {
+                return nodes.slice(0).sort(function (n1, n2) {
+                    if (n1.name && n2.name) {
+                        return localeCompareFix(ts.getPropertyNameForPropertyNameNode(n1.name), ts.getPropertyNameForPropertyNameNode(n2.name));
+                    }
+                    else if (n1.name) {
+                        return 1;
+                    }
+                    else if (n2.name) {
+                        return -1;
+                    }
+                    else {
+                        return n1.kind - n2.kind;
+                    }
+                });
+                // node 0.10 treats "a" as greater than "B".
+                // For consistency, sort alphabetically, falling back to which is lower-case.
+                function localeCompareFix(a, b) {
+                    var cmp = a.toLowerCase().localeCompare(b.toLowerCase());
+                    if (cmp !== 0)
+                        return cmp;
+                    // Return the *opposite* of the `<` operator, which works the same in node 0.10 and 6.0.
+                    return a < b ? 1 : a > b ? -1 : 0;
+                }
+            }
+            function addTopLevelNodes(nodes, topLevelNodes) {
+                nodes = sortNodes(nodes);
+                for (var _i = 0, nodes_4 = nodes; _i < nodes_4.length; _i++) {
+                    var node = nodes_4[_i];
+                    switch (node.kind) {
+                        case 221 /* ClassDeclaration */:
+                            topLevelNodes.push(node);
+                            for (var _a = 0, _b = node.members; _a < _b.length; _a++) {
+                                var member = _b[_a];
+                                if (member.kind === 147 /* MethodDeclaration */ || member.kind === 148 /* Constructor */) {
+                                    if (member.body) {
+                                        // We do not include methods that does not have child functions in it, because of duplications.
+                                        if (hasNamedFunctionDeclarations(member.body.statements)) {
+                                            topLevelNodes.push(member);
+                                        }
+                                        addTopLevelNodes(member.body.statements, topLevelNodes);
+                                    }
+                                }
+                            }
+                            break;
+                        case 224 /* EnumDeclaration */:
+                        case 222 /* InterfaceDeclaration */:
+                        case 223 /* TypeAliasDeclaration */:
+                            topLevelNodes.push(node);
+                            break;
+                        case 225 /* ModuleDeclaration */:
+                            var moduleDeclaration = node;
+                            topLevelNodes.push(node);
+                            addTopLevelNodes(getInnermostModule(moduleDeclaration).body.statements, topLevelNodes);
+                            break;
+                        case 220 /* FunctionDeclaration */:
+                            var functionDeclaration = node;
+                            if (isTopLevelFunctionDeclaration(functionDeclaration)) {
+                                topLevelNodes.push(node);
+                                addTopLevelNodes(functionDeclaration.body.statements, topLevelNodes);
+                            }
+                            break;
+                    }
+                }
+            }
+            function hasNamedFunctionDeclarations(nodes) {
+                for (var _i = 0, nodes_5 = nodes; _i < nodes_5.length; _i++) {
+                    var s = nodes_5[_i];
+                    if (s.kind === 220 /* FunctionDeclaration */ && !isEmpty(s.name.text)) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function isTopLevelFunctionDeclaration(functionDeclaration) {
+                if (functionDeclaration.kind === 220 /* FunctionDeclaration */) {
+                    // A function declaration is 'top level' if it contains any function declarations
+                    // within it.
+                    if (functionDeclaration.body && functionDeclaration.body.kind === 199 /* Block */) {
+                        // Proper function declarations can only have identifier names
+                        if (hasNamedFunctionDeclarations(functionDeclaration.body.statements)) {
+                            return true;
+                        }
+                        // Or if it is not parented by another function. I.e all functions at module scope are 'top level'.
+                        if (!ts.isFunctionBlock(functionDeclaration.parent)) {
+                            return true;
+                        }
+                        else {
+                            // We have made sure that a grand parent node exists with 'isFunctionBlock()' above.
+                            var grandParentKind = functionDeclaration.parent.parent.kind;
+                            if (grandParentKind === 147 /* MethodDeclaration */ ||
+                                grandParentKind === 148 /* Constructor */) {
+                                return true;
+                            }
+                        }
+                    }
+                }
+                return false;
+            }
+            function getItemsWorker(nodes, createItem) {
+                var items = [];
+                var keyToItem = {};
+                for (var _i = 0, nodes_6 = nodes; _i < nodes_6.length; _i++) {
+                    var child = nodes_6[_i];
+                    var item = createItem(child);
+                    if (item !== undefined) {
+                        if (item.text.length > 0) {
+                            var key = item.text + "-" + item.kind + "-" + item.indent;
+                            var itemWithSameName = keyToItem[key];
+                            if (itemWithSameName) {
+                                // We had an item with the same name.  Merge these items together.
+                                merge(itemWithSameName, item);
+                            }
+                            else {
+                                keyToItem[key] = item;
+                                items.push(item);
+                            }
+                        }
+                    }
+                }
+                return items;
+            }
+            function merge(target, source) {
+                // First, add any spans in the source to the target.
+                ts.addRange(target.spans, source.spans);
+                if (source.childItems) {
+                    if (!target.childItems) {
+                        target.childItems = [];
+                    }
+                    // Next, recursively merge or add any children in the source as appropriate.
+                    outer: for (var _i = 0, _a = source.childItems; _i < _a.length; _i++) {
+                        var sourceChild = _a[_i];
+                        for (var _b = 0, _c = target.childItems; _b < _c.length; _b++) {
+                            var targetChild = _c[_b];
+                            if (targetChild.text === sourceChild.text && targetChild.kind === sourceChild.kind) {
+                                // Found a match.  merge them.
+                                merge(targetChild, sourceChild);
+                                continue outer;
+                            }
+                        }
+                        // Didn't find a match, just add this child to the list.
+                        target.childItems.push(sourceChild);
+                    }
+                }
+            }
+            function createChildItem(node) {
+                switch (node.kind) {
+                    case 142 /* Parameter */:
+                        if (ts.isBindingPattern(node.name)) {
+                            break;
+                        }
+                        if ((node.flags & 1023 /* Modifier */) === 0) {
+                            return undefined;
+                        }
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberFunctionElement);
+                    case 149 /* GetAccessor */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberGetAccessorElement);
+                    case 150 /* SetAccessor */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberSetAccessorElement);
+                    case 153 /* IndexSignature */:
+                        return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
+                    case 224 /* EnumDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.enumElement);
+                    case 255 /* EnumMember */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 225 /* ModuleDeclaration */:
+                        return createItem(node, getModuleName(node), ts.ScriptElementKind.moduleElement);
+                    case 222 /* InterfaceDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.interfaceElement);
+                    case 223 /* TypeAliasDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.typeElement);
+                    case 151 /* CallSignature */:
+                        return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
+                    case 152 /* ConstructSignature */:
+                        return createItem(node, "new()", ts.ScriptElementKind.constructSignatureElement);
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.memberVariableElement);
+                    case 221 /* ClassDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.classElement);
+                    case 220 /* FunctionDeclaration */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.functionElement);
+                    case 218 /* VariableDeclaration */:
+                    case 169 /* BindingElement */:
+                        var variableDeclarationNode = void 0;
+                        var name_36;
+                        if (node.kind === 169 /* BindingElement */) {
+                            name_36 = node.name;
+                            variableDeclarationNode = node;
+                            // binding elements are added only for variable declarations
+                            // bubble up to the containing variable declaration
+                            while (variableDeclarationNode && variableDeclarationNode.kind !== 218 /* VariableDeclaration */) {
+                                variableDeclarationNode = variableDeclarationNode.parent;
+                            }
+                            ts.Debug.assert(variableDeclarationNode !== undefined);
+                        }
+                        else {
+                            ts.Debug.assert(!ts.isBindingPattern(node.name));
+                            variableDeclarationNode = node;
+                            name_36 = node.name;
+                        }
+                        if (ts.isConst(variableDeclarationNode)) {
+                            return createItem(node, getTextOfNode(name_36), ts.ScriptElementKind.constElement);
+                        }
+                        else if (ts.isLet(variableDeclarationNode)) {
+                            return createItem(node, getTextOfNode(name_36), ts.ScriptElementKind.letElement);
+                        }
+                        else {
+                            return createItem(node, getTextOfNode(name_36), ts.ScriptElementKind.variableElement);
+                        }
+                    case 148 /* Constructor */:
+                        return createItem(node, "constructor", ts.ScriptElementKind.constructorImplementationElement);
+                    case 238 /* ExportSpecifier */:
+                    case 234 /* ImportSpecifier */:
+                    case 229 /* ImportEqualsDeclaration */:
+                    case 231 /* ImportClause */:
+                    case 232 /* NamespaceImport */:
+                        return createItem(node, getTextOfNode(node.name), ts.ScriptElementKind.alias);
+                }
+                return undefined;
+                function createItem(node, name, scriptElementKind) {
+                    return getNavigationBarItem(name, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)]);
+                }
+            }
+            function isEmpty(text) {
+                return !text || text.trim() === "";
+            }
+            function getNavigationBarItem(text, kind, kindModifiers, spans, childItems, indent) {
+                if (childItems === void 0) { childItems = []; }
+                if (indent === void 0) { indent = 0; }
+                if (isEmpty(text)) {
+                    return undefined;
+                }
+                return {
+                    text: text,
+                    kind: kind,
+                    kindModifiers: kindModifiers,
+                    spans: spans,
+                    childItems: childItems,
+                    indent: indent,
+                    bolded: false,
+                    grayed: false
+                };
+            }
+            function createTopLevelItem(node) {
+                switch (node.kind) {
+                    case 256 /* SourceFile */:
+                        return createSourceFileItem(node);
+                    case 221 /* ClassDeclaration */:
+                        return createClassItem(node);
+                    case 147 /* MethodDeclaration */:
+                    case 148 /* Constructor */:
+                        return createMemberFunctionLikeItem(node);
+                    case 224 /* EnumDeclaration */:
+                        return createEnumItem(node);
+                    case 222 /* InterfaceDeclaration */:
+                        return createInterfaceItem(node);
+                    case 225 /* ModuleDeclaration */:
+                        return createModuleItem(node);
+                    case 220 /* FunctionDeclaration */:
+                        return createFunctionItem(node);
+                    case 223 /* TypeAliasDeclaration */:
+                        return createTypeAliasItem(node);
+                }
+                return undefined;
+                function createModuleItem(node) {
+                    var moduleName = getModuleName(node);
+                    var childItems = getItemsWorker(getChildNodes(getInnermostModule(node).body.statements), createChildItem);
+                    return getNavigationBarItem(moduleName, ts.ScriptElementKind.moduleElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+                function createFunctionItem(node) {
+                    if (node.body && node.body.kind === 199 /* Block */) {
+                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
+                        return getNavigationBarItem(!node.name ? "default" : node.name.text, ts.ScriptElementKind.functionElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                    }
+                    return undefined;
+                }
+                function createTypeAliasItem(node) {
+                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.typeElement, ts.getNodeModifiers(node), [getNodeSpan(node)], [], getIndent(node));
+                }
+                function createMemberFunctionLikeItem(node) {
+                    if (node.body && node.body.kind === 199 /* Block */) {
+                        var childItems = getItemsWorker(sortNodes(node.body.statements), createChildItem);
+                        var scriptElementKind = void 0;
+                        var memberFunctionName = void 0;
+                        if (node.kind === 147 /* MethodDeclaration */) {
+                            memberFunctionName = ts.getPropertyNameForPropertyNameNode(node.name);
+                            scriptElementKind = ts.ScriptElementKind.memberFunctionElement;
+                        }
+                        else {
+                            memberFunctionName = "constructor";
+                            scriptElementKind = ts.ScriptElementKind.constructorImplementationElement;
+                        }
+                        return getNavigationBarItem(memberFunctionName, scriptElementKind, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                    }
+                    return undefined;
+                }
+                function createSourceFileItem(node) {
+                    var childItems = getItemsWorker(getChildNodes(node.statements), createChildItem);
+                    var rootName = ts.isExternalModule(node)
+                        ? "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(node.fileName)))) + "\""
+                        : "<global>";
+                    return getNavigationBarItem(rootName, ts.ScriptElementKind.moduleElement, ts.ScriptElementKindModifier.none, [getNodeSpan(node)], childItems);
+                }
+                function createClassItem(node) {
+                    var childItems;
+                    if (node.members) {
+                        var constructor = ts.forEach(node.members, function (member) {
+                            return member.kind === 148 /* Constructor */ && member;
+                        });
+                        // Add the constructor parameters in as children of the class (for property parameters).
+                        // Note that *all non-binding pattern named* parameters will be added to the nodes array, but parameters that
+                        // are not properties will be filtered out later by createChildItem.
+                        var nodes = removeDynamicallyNamedProperties(node);
+                        if (constructor) {
+                            ts.addRange(nodes, ts.filter(constructor.parameters, function (p) { return !ts.isBindingPattern(p.name); }));
+                        }
+                        childItems = getItemsWorker(sortNodes(nodes), createChildItem);
+                    }
+                    var nodeName = !node.name ? "default" : node.name.text;
+                    return getNavigationBarItem(nodeName, ts.ScriptElementKind.classElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+                function createEnumItem(node) {
+                    var childItems = getItemsWorker(sortNodes(removeComputedProperties(node)), createChildItem);
+                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.enumElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+                function createInterfaceItem(node) {
+                    var childItems = getItemsWorker(sortNodes(removeDynamicallyNamedProperties(node)), createChildItem);
+                    return getNavigationBarItem(node.name.text, ts.ScriptElementKind.interfaceElement, ts.getNodeModifiers(node), [getNodeSpan(node)], childItems, getIndent(node));
+                }
+            }
+            function getModuleName(moduleDeclaration) {
+                // We want to maintain quotation marks.
+                if (ts.isAmbientModule(moduleDeclaration)) {
+                    return getTextOfNode(moduleDeclaration.name);
+                }
+                // Otherwise, we need to aggregate each identifier to build up the qualified name.
+                var result = [];
+                result.push(moduleDeclaration.name.text);
+                while (moduleDeclaration.body && moduleDeclaration.body.kind === 225 /* ModuleDeclaration */) {
+                    moduleDeclaration = moduleDeclaration.body;
+                    result.push(moduleDeclaration.name.text);
+                }
+                return result.join(".");
+            }
+            function removeComputedProperties(node) {
+                return ts.filter(node.members, function (member) { return member.name === undefined || member.name.kind !== 140 /* ComputedPropertyName */; });
+            }
+            /**
+             * Like removeComputedProperties, but retains the properties with well known symbol names
+             */
+            function removeDynamicallyNamedProperties(node) {
+                return ts.filter(node.members, function (member) { return !ts.hasDynamicName(member); });
+            }
+            function getInnermostModule(node) {
+                while (node.body.kind === 225 /* ModuleDeclaration */) {
+                    node = node.body;
+                }
+                return node;
+            }
+            function getNodeSpan(node) {
+                return node.kind === 256 /* SourceFile */
+                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
+                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
+            }
+            function getTextOfNode(node) {
+                return ts.getTextOfNodeFromSourceText(sourceFile.text, node);
+            }
+        }
+        NavigationBar.getNavigationBarItems = getNavigationBarItems;
+        function getJsNavigationBarItems(sourceFile, compilerOptions) {
+            var anonFnText = "<function>";
+            var anonClassText = "<class>";
+            var indent = 0;
+            var rootName = ts.isExternalModule(sourceFile) ?
+                "\"" + ts.escapeString(ts.getBaseFileName(ts.removeFileExtension(ts.normalizePath(sourceFile.fileName)))) + "\""
+                : "<global>";
+            var sourceFileItem = getNavBarItem(rootName, ts.ScriptElementKind.moduleElement, [getNodeSpan(sourceFile)]);
+            var topItem = sourceFileItem;
+            // Walk the whole file, because we want to also find function expressions - which may be in variable initializer,
+            // call arguments, expressions, etc...
+            ts.forEachChild(sourceFile, visitNode);
+            function visitNode(node) {
+                var newItem = createNavBarItem(node);
+                if (newItem) {
+                    topItem.childItems.push(newItem);
+                }
+                if (node.jsDocComments && node.jsDocComments.length > 0) {
+                    for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        visitNode(jsDocComment);
+                    }
+                }
+                // Add a level if traversing into a container
+                if (newItem && (ts.isFunctionLike(node) || ts.isClassLike(node))) {
+                    var lastTop = topItem;
+                    indent++;
+                    topItem = newItem;
+                    ts.forEachChild(node, visitNode);
+                    topItem = lastTop;
+                    indent--;
+                    // If the last item added was an anonymous function expression, and it had no children, discard it.
+                    if (newItem && newItem.text === anonFnText && newItem.childItems.length === 0) {
+                        topItem.childItems.pop();
+                    }
+                }
+                else {
+                    ts.forEachChild(node, visitNode);
+                }
+            }
+            function createNavBarItem(node) {
+                switch (node.kind) {
+                    case 218 /* VariableDeclaration */:
+                        // Only add to the navbar if at the top-level of the file
+                        // Note: "const" and "let" are also SyntaxKind.VariableDeclarations
+                        if (node.parent /*VariableDeclarationList*/.parent /*VariableStatement*/
+                            .parent /*SourceFile*/.kind !== 256 /* SourceFile */) {
+                            return undefined;
+                        }
+                        // If it is initialized with a function expression, handle it when we reach the function expression node
+                        var varDecl = node;
+                        if (varDecl.initializer && (varDecl.initializer.kind === 179 /* FunctionExpression */ ||
+                            varDecl.initializer.kind === 180 /* ArrowFunction */ ||
+                            varDecl.initializer.kind === 192 /* ClassExpression */)) {
+                            return undefined;
+                        }
+                    // Fall through
+                    case 220 /* FunctionDeclaration */:
+                    case 221 /* ClassDeclaration */:
+                    case 148 /* Constructor */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        // "export default function().." looks just like a regular function/class declaration, except with the 'default' flag
+                        var name_37 = node.flags && (node.flags & 512 /* Default */) && !node.name ? "default" :
+                            node.kind === 148 /* Constructor */ ? "constructor" :
+                                ts.declarationNameToString(node.name);
+                        return getNavBarItem(name_37, getScriptKindForElementKind(node.kind), [getNodeSpan(node)]);
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 192 /* ClassExpression */:
+                        return getDefineModuleItem(node) || getFunctionOrClassExpressionItem(node);
+                    case 147 /* MethodDeclaration */:
+                        var methodDecl = node;
+                        return getNavBarItem(ts.declarationNameToString(methodDecl.name), ts.ScriptElementKind.memberFunctionElement, [getNodeSpan(node)]);
+                    case 235 /* ExportAssignment */:
+                        // e.g. "export default <expr>"
+                        return getNavBarItem("default", ts.ScriptElementKind.variableElement, [getNodeSpan(node)]);
+                    case 231 /* ImportClause */:
+                        if (!node.name) {
+                            // No default import (this node is still a parent of named & namespace imports, which are handled below)
+                            return undefined;
+                        }
+                    // fall through
+                    case 234 /* ImportSpecifier */: // e.g. 'id' in: import {id} from 'mod' (in NamedImports, in ImportClause)
+                    case 232 /* NamespaceImport */: // e.g. '* as ns' in: import * as ns from 'mod' (in ImportClause)
+                    case 238 /* ExportSpecifier */:
+                        // Export specifiers are only interesting if they are reexports from another module, or renamed, else they are already globals
+                        if (node.kind === 238 /* ExportSpecifier */) {
+                            if (!node.parent.parent.moduleSpecifier && !node.propertyName) {
+                                return undefined;
+                            }
+                        }
+                        var decl = node;
+                        if (!decl.name) {
+                            return undefined;
+                        }
+                        var declName = ts.declarationNameToString(decl.name);
+                        return getNavBarItem(declName, ts.ScriptElementKind.constElement, [getNodeSpan(node)]);
+                    case 279 /* JSDocTypedefTag */:
+                        if (node.name) {
+                            return getNavBarItem(node.name.text, ts.ScriptElementKind.typeElement, [getNodeSpan(node)]);
+                        }
+                        else {
+                            var parentNode = node.parent && node.parent.parent;
+                            if (parentNode && parentNode.kind === 200 /* VariableStatement */) {
+                                if (parentNode.declarationList.declarations.length > 0) {
+                                    var nameIdentifier = parentNode.declarationList.declarations[0].name;
+                                    if (nameIdentifier.kind === 69 /* Identifier */) {
+                                        return getNavBarItem(nameIdentifier.text, ts.ScriptElementKind.typeElement, [getNodeSpan(node)]);
+                                    }
+                                }
+                            }
+                        }
+                    default:
+                        return undefined;
+                }
+            }
+            function getNavBarItem(text, kind, spans, kindModifiers) {
+                if (kindModifiers === void 0) { kindModifiers = ts.ScriptElementKindModifier.none; }
+                return {
+                    text: text, kind: kind, kindModifiers: kindModifiers, spans: spans, childItems: [], indent: indent, bolded: false, grayed: false
+                };
+            }
+            function getDefineModuleItem(node) {
+                if (node.kind !== 179 /* FunctionExpression */ && node.kind !== 180 /* ArrowFunction */) {
+                    return undefined;
+                }
+                // No match if this is not a call expression to an identifier named 'define'
+                if (node.parent.kind !== 174 /* CallExpression */) {
+                    return undefined;
+                }
+                var callExpr = node.parent;
+                if (callExpr.expression.kind !== 69 /* Identifier */ || callExpr.expression.getText() !== "define") {
+                    return undefined;
+                }
+                // Return a module of either the given text in the first argument, or of the source file path
+                var defaultName = node.getSourceFile().fileName;
+                if (callExpr.arguments[0].kind === 9 /* StringLiteral */) {
+                    defaultName = (callExpr.arguments[0]).text;
+                }
+                return getNavBarItem(defaultName, ts.ScriptElementKind.moduleElement, [getNodeSpan(node.parent)]);
+            }
+            function getFunctionOrClassExpressionItem(node) {
+                if (node.kind !== 179 /* FunctionExpression */ &&
+                    node.kind !== 180 /* ArrowFunction */ &&
+                    node.kind !== 192 /* ClassExpression */) {
+                    return undefined;
+                }
+                var fnExpr = node;
+                var fnName;
+                if (fnExpr.name && ts.getFullWidth(fnExpr.name) > 0) {
+                    // The expression has an identifier, so use that as the name
+                    fnName = ts.declarationNameToString(fnExpr.name);
+                }
+                else {
+                    // See if it is a var initializer. If so, use the var name.
+                    if (fnExpr.parent.kind === 218 /* VariableDeclaration */) {
+                        fnName = ts.declarationNameToString(fnExpr.parent.name);
+                    }
+                    else if (fnExpr.parent.kind === 187 /* BinaryExpression */ &&
+                        fnExpr.parent.operatorToken.kind === 56 /* EqualsToken */) {
+                        fnName = fnExpr.parent.left.getText();
+                    }
+                    else if (fnExpr.parent.kind === 253 /* PropertyAssignment */ &&
+                        fnExpr.parent.name) {
+                        fnName = fnExpr.parent.name.getText();
+                    }
+                    else {
+                        fnName = node.kind === 192 /* ClassExpression */ ? anonClassText : anonFnText;
+                    }
+                }
+                var scriptKind = node.kind === 192 /* ClassExpression */ ? ts.ScriptElementKind.classElement : ts.ScriptElementKind.functionElement;
+                return getNavBarItem(fnName, scriptKind, [getNodeSpan(node)]);
+            }
+            function getNodeSpan(node) {
+                return node.kind === 256 /* SourceFile */
+                    ? ts.createTextSpanFromBounds(node.getFullStart(), node.getEnd())
+                    : ts.createTextSpanFromBounds(node.getStart(), node.getEnd());
+            }
+            function getScriptKindForElementKind(kind) {
+                switch (kind) {
+                    case 218 /* VariableDeclaration */:
+                        return ts.ScriptElementKind.variableElement;
+                    case 220 /* FunctionDeclaration */:
+                        return ts.ScriptElementKind.functionElement;
+                    case 221 /* ClassDeclaration */:
+                        return ts.ScriptElementKind.classElement;
+                    case 148 /* Constructor */:
+                        return ts.ScriptElementKind.constructorImplementationElement;
+                    case 149 /* GetAccessor */:
+                        return ts.ScriptElementKind.memberGetAccessorElement;
+                    case 150 /* SetAccessor */:
+                        return ts.ScriptElementKind.memberSetAccessorElement;
+                    default:
+                        return "unknown";
+                }
+            }
+            return sourceFileItem.childItems;
+        }
+        NavigationBar.getJsNavigationBarItems = getJsNavigationBarItems;
+    })(NavigationBar = ts.NavigationBar || (ts.NavigationBar = {}));
+})(ts || (ts = {}));
+/* @internal */
+var ts;
+(function (ts) {
+    // Note(cyrusn): this enum is ordered from strongest match type to weakest match type.
+    (function (PatternMatchKind) {
+        PatternMatchKind[PatternMatchKind["exact"] = 0] = "exact";
+        PatternMatchKind[PatternMatchKind["prefix"] = 1] = "prefix";
+        PatternMatchKind[PatternMatchKind["substring"] = 2] = "substring";
+        PatternMatchKind[PatternMatchKind["camelCase"] = 3] = "camelCase";
+    })(ts.PatternMatchKind || (ts.PatternMatchKind = {}));
+    var PatternMatchKind = ts.PatternMatchKind;
+    function createPatternMatch(kind, punctuationStripped, isCaseSensitive, camelCaseWeight) {
+        return {
+            kind: kind,
+            punctuationStripped: punctuationStripped,
+            isCaseSensitive: isCaseSensitive,
+            camelCaseWeight: camelCaseWeight
+        };
+    }
+    function createPatternMatcher(pattern) {
+        // We'll often see the same candidate string many times when searching (For example, when
+        // we see the name of a module that is used everywhere, or the name of an overload).  As
+        // such, we cache the information we compute about the candidate for the life of this
+        // pattern matcher so we don't have to compute it multiple times.
+        var stringToWordSpans = {};
+        pattern = pattern.trim();
+        var dotSeparatedSegments = pattern.split(".").map(function (p) { return createSegment(p.trim()); });
+        var invalidPattern = dotSeparatedSegments.length === 0 || ts.forEach(dotSeparatedSegments, segmentIsInvalid);
+        return {
+            getMatches: getMatches,
+            getMatchesForLastSegmentOfPattern: getMatchesForLastSegmentOfPattern,
+            patternContainsDots: dotSeparatedSegments.length > 1
+        };
+        // Quick checks so we can bail out when asked to match a candidate.
+        function skipMatch(candidate) {
+            return invalidPattern || !candidate;
+        }
+        function getMatchesForLastSegmentOfPattern(candidate) {
+            if (skipMatch(candidate)) {
+                return undefined;
+            }
+            return matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
+        }
+        function getMatches(candidateContainers, candidate) {
+            if (skipMatch(candidate)) {
+                return undefined;
+            }
+            // First, check that the last part of the dot separated pattern matches the name of the
+            // candidate.  If not, then there's no point in proceeding and doing the more
+            // expensive work.
+            var candidateMatch = matchSegment(candidate, ts.lastOrUndefined(dotSeparatedSegments));
+            if (!candidateMatch) {
+                return undefined;
+            }
+            candidateContainers = candidateContainers || [];
+            // -1 because the last part was checked against the name, and only the rest
+            // of the parts are checked against the container.
+            if (dotSeparatedSegments.length - 1 > candidateContainers.length) {
+                // There weren't enough container parts to match against the pattern parts.
+                // So this definitely doesn't match.
+                return undefined;
+            }
+            // So far so good.  Now break up the container for the candidate and check if all
+            // the dotted parts match up correctly.
+            var totalMatch = candidateMatch;
+            for (var i = dotSeparatedSegments.length - 2, j = candidateContainers.length - 1; i >= 0; i -= 1, j -= 1) {
+                var segment = dotSeparatedSegments[i];
+                var containerName = candidateContainers[j];
+                var containerMatch = matchSegment(containerName, segment);
+                if (!containerMatch) {
+                    // This container didn't match the pattern piece.  So there's no match at all.
+                    return undefined;
+                }
+                ts.addRange(totalMatch, containerMatch);
+            }
+            // Success, this symbol's full name matched against the dotted name the user was asking
+            // about.
+            return totalMatch;
+        }
+        function getWordSpans(word) {
+            if (!ts.hasProperty(stringToWordSpans, word)) {
+                stringToWordSpans[word] = breakIntoWordSpans(word);
+            }
+            return stringToWordSpans[word];
+        }
+        function matchTextChunk(candidate, chunk, punctuationStripped) {
+            var index = indexOfIgnoringCase(candidate, chunk.textLowerCase);
+            if (index === 0) {
+                if (chunk.text.length === candidate.length) {
+                    // a) Check if the part matches the candidate entirely, in an case insensitive or
+                    //    sensitive manner.  If it does, return that there was an exact match.
+                    return createPatternMatch(PatternMatchKind.exact, punctuationStripped, /*isCaseSensitive:*/ candidate === chunk.text);
+                }
+                else {
+                    // b) Check if the part is a prefix of the candidate, in a case insensitive or sensitive
+                    //    manner.  If it does, return that there was a prefix match.
+                    return createPatternMatch(PatternMatchKind.prefix, punctuationStripped, /*isCaseSensitive:*/ startsWith(candidate, chunk.text));
+                }
+            }
+            var isLowercase = chunk.isLowerCase;
+            if (isLowercase) {
+                if (index > 0) {
+                    // c) If the part is entirely lowercase, then check if it is contained anywhere in the
+                    //    candidate in a case insensitive manner.  If so, return that there was a substring
+                    //    match.
+                    //
+                    //    Note: We only have a substring match if the lowercase part is prefix match of some
+                    //    word part. That way we don't match something like 'Class' when the user types 'a'.
+                    //    But we would match 'FooAttribute' (since 'Attribute' starts with 'a').
+                    var wordSpans = getWordSpans(candidate);
+                    for (var _i = 0, wordSpans_1 = wordSpans; _i < wordSpans_1.length; _i++) {
+                        var span = wordSpans_1[_i];
+                        if (partStartsWith(candidate, span, chunk.text, /*ignoreCase:*/ true)) {
+                            return createPatternMatch(PatternMatchKind.substring, punctuationStripped, 
+                            /*isCaseSensitive:*/ partStartsWith(candidate, span, chunk.text, /*ignoreCase:*/ false));
+                        }
+                    }
+                }
+            }
+            else {
+                // d) If the part was not entirely lowercase, then check if it is contained in the
+                //    candidate in a case *sensitive* manner. If so, return that there was a substring
+                //    match.
+                if (candidate.indexOf(chunk.text) > 0) {
+                    return createPatternMatch(PatternMatchKind.substring, punctuationStripped, /*isCaseSensitive:*/ true);
+                }
+            }
+            if (!isLowercase) {
+                // e) If the part was not entirely lowercase, then attempt a camel cased match as well.
+                if (chunk.characterSpans.length > 0) {
+                    var candidateParts = getWordSpans(candidate);
+                    var camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, /*ignoreCase:*/ false);
+                    if (camelCaseWeight !== undefined) {
+                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, /*isCaseSensitive:*/ true, /*camelCaseWeight:*/ camelCaseWeight);
+                    }
+                    camelCaseWeight = tryCamelCaseMatch(candidate, candidateParts, chunk, /*ignoreCase:*/ true);
+                    if (camelCaseWeight !== undefined) {
+                        return createPatternMatch(PatternMatchKind.camelCase, punctuationStripped, /*isCaseSensitive:*/ false, /*camelCaseWeight:*/ camelCaseWeight);
+                    }
+                }
+            }
+            if (isLowercase) {
+                // f) Is the pattern a substring of the candidate starting on one of the candidate's word boundaries?
+                // We could check every character boundary start of the candidate for the pattern. However, that's
+                // an m * n operation in the wost case. Instead, find the first instance of the pattern
+                // substring, and see if it starts on a capital letter. It seems unlikely that the user will try to
+                // filter the list based on a substring that starts on a capital letter and also with a lowercase one.
+                // (Pattern: fogbar, Candidate: quuxfogbarFogBar).
+                if (chunk.text.length < candidate.length) {
+                    if (index > 0 && isUpperCaseLetter(candidate.charCodeAt(index))) {
+                        return createPatternMatch(PatternMatchKind.substring, punctuationStripped, /*isCaseSensitive:*/ false);
+                    }
+                }
+            }
+            return undefined;
+        }
+        function containsSpaceOrAsterisk(text) {
+            for (var i = 0; i < text.length; i++) {
+                var ch = text.charCodeAt(i);
+                if (ch === 32 /* space */ || ch === 42 /* asterisk */) {
+                    return true;
+                }
+            }
+            return false;
+        }
+        function matchSegment(candidate, segment) {
+            // First check if the segment matches as is.  This is also useful if the segment contains
+            // characters we would normally strip when splitting into parts that we also may want to
+            // match in the candidate.  For example if the segment is "@int" and the candidate is
+            // "@int", then that will show up as an exact match here.
+            //
+            // Note: if the segment contains a space or an asterisk then we must assume that it's a
+            // multi-word segment.
+            if (!containsSpaceOrAsterisk(segment.totalTextChunk.text)) {
+                var match = matchTextChunk(candidate, segment.totalTextChunk, /*punctuationStripped:*/ false);
+                if (match) {
+                    return [match];
+                }
+            }
+            // The logic for pattern matching is now as follows:
+            //
+            // 1) Break the segment passed in into words.  Breaking is rather simple and a
+            //    good way to think about it that if gives you all the individual alphanumeric words
+            //    of the pattern.
+            //
+            // 2) For each word try to match the word against the candidate value.
+            //
+            // 3) Matching is as follows:
+            //
+            //   a) Check if the word matches the candidate entirely, in an case insensitive or
+            //    sensitive manner.  If it does, return that there was an exact match.
+            //
+            //   b) Check if the word is a prefix of the candidate, in a case insensitive or
+            //      sensitive manner.  If it does, return that there was a prefix match.
+            //
+            //   c) If the word is entirely lowercase, then check if it is contained anywhere in the
+            //      candidate in a case insensitive manner.  If so, return that there was a substring
+            //      match.
+            //
+            //      Note: We only have a substring match if the lowercase part is prefix match of
+            //      some word part. That way we don't match something like 'Class' when the user
+            //      types 'a'. But we would match 'FooAttribute' (since 'Attribute' starts with
+            //      'a').
+            //
+            //   d) If the word was not entirely lowercase, then check if it is contained in the
+            //      candidate in a case *sensitive* manner. If so, return that there was a substring
+            //      match.
+            //
+            //   e) If the word was not entirely lowercase, then attempt a camel cased match as
+            //      well.
+            //
+            //   f) The word is all lower case. Is it a case insensitive substring of the candidate starting
+            //      on a part boundary of the candidate?
+            //
+            // Only if all words have some sort of match is the pattern considered matched.
+            var subWordTextChunks = segment.subWordTextChunks;
+            var matches = undefined;
+            for (var _i = 0, subWordTextChunks_1 = subWordTextChunks; _i < subWordTextChunks_1.length; _i++) {
+                var subWordTextChunk = subWordTextChunks_1[_i];
+                // Try to match the candidate with this word
+                var result = matchTextChunk(candidate, subWordTextChunk, /*punctuationStripped:*/ true);
+                if (!result) {
+                    return undefined;
+                }
+                matches = matches || [];
+                matches.push(result);
+            }
+            return matches;
+        }
+        function partStartsWith(candidate, candidateSpan, pattern, ignoreCase, patternSpan) {
+            var patternPartStart = patternSpan ? patternSpan.start : 0;
+            var patternPartLength = patternSpan ? patternSpan.length : pattern.length;
+            if (patternPartLength > candidateSpan.length) {
+                // Pattern part is longer than the candidate part. There can never be a match.
+                return false;
+            }
+            if (ignoreCase) {
+                for (var i = 0; i < patternPartLength; i++) {
+                    var ch1 = pattern.charCodeAt(patternPartStart + i);
+                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
+                    if (toLowerCase(ch1) !== toLowerCase(ch2)) {
+                        return false;
+                    }
+                }
+            }
+            else {
+                for (var i = 0; i < patternPartLength; i++) {
+                    var ch1 = pattern.charCodeAt(patternPartStart + i);
+                    var ch2 = candidate.charCodeAt(candidateSpan.start + i);
+                    if (ch1 !== ch2) {
+                        return false;
+                    }
+                }
+            }
+            return true;
+        }
+        function tryCamelCaseMatch(candidate, candidateParts, chunk, ignoreCase) {
+            var chunkCharacterSpans = chunk.characterSpans;
+            // Note: we may have more pattern parts than candidate parts.  This is because multiple
+            // pattern parts may match a candidate part.  For example "SiUI" against "SimpleUI".
+            // We'll have 3 pattern parts Si/U/I against two candidate parts Simple/UI.  However, U
+            // and I will both match in UI.
+            var currentCandidate = 0;
+            var currentChunkSpan = 0;
+            var firstMatch = undefined;
+            var contiguous = undefined;
+            while (true) {
+                // Let's consider our termination cases
+                if (currentChunkSpan === chunkCharacterSpans.length) {
+                    // We did match! We shall assign a weight to this
+                    var weight = 0;
+                    // Was this contiguous?
+                    if (contiguous) {
+                        weight += 1;
+                    }
+                    // Did we start at the beginning of the candidate?
+                    if (firstMatch === 0) {
+                        weight += 2;
+                    }
+                    return weight;
+                }
+                else if (currentCandidate === candidateParts.length) {
+                    // No match, since we still have more of the pattern to hit
+                    return undefined;
+                }
+                var candidatePart = candidateParts[currentCandidate];
+                var gotOneMatchThisCandidate = false;
+                // Consider the case of matching SiUI against SimpleUIElement. The candidate parts
+                // will be Simple/UI/Element, and the pattern parts will be Si/U/I.  We'll match 'Si'
+                // against 'Simple' first.  Then we'll match 'U' against 'UI'. However, we want to
+                // still keep matching pattern parts against that candidate part.
+                for (; currentChunkSpan < chunkCharacterSpans.length; currentChunkSpan++) {
+                    var chunkCharacterSpan = chunkCharacterSpans[currentChunkSpan];
+                    if (gotOneMatchThisCandidate) {
+                        // We've already gotten one pattern part match in this candidate.  We will
+                        // only continue trying to consumer pattern parts if the last part and this
+                        // part are both upper case.
+                        if (!isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan - 1].start)) ||
+                            !isUpperCaseLetter(chunk.text.charCodeAt(chunkCharacterSpans[currentChunkSpan].start))) {
+                            break;
+                        }
+                    }
+                    if (!partStartsWith(candidate, candidatePart, chunk.text, ignoreCase, chunkCharacterSpan)) {
+                        break;
+                    }
+                    gotOneMatchThisCandidate = true;
+                    firstMatch = firstMatch === undefined ? currentCandidate : firstMatch;
+                    // If we were contiguous, then keep that value.  If we weren't, then keep that
+                    // value.  If we don't know, then set the value to 'true' as an initial match is
+                    // obviously contiguous.
+                    contiguous = contiguous === undefined ? true : contiguous;
+                    candidatePart = ts.createTextSpan(candidatePart.start + chunkCharacterSpan.length, candidatePart.length - chunkCharacterSpan.length);
+                }
+                // Check if we matched anything at all.  If we didn't, then we need to unset the
+                // contiguous bit if we currently had it set.
+                // If we haven't set the bit yet, then that means we haven't matched anything so
+                // far, and we don't want to change that.
+                if (!gotOneMatchThisCandidate && contiguous !== undefined) {
+                    contiguous = false;
+                }
+                // Move onto the next candidate.
+                currentCandidate++;
+            }
+        }
+    }
+    ts.createPatternMatcher = createPatternMatcher;
+    function createSegment(text) {
+        return {
+            totalTextChunk: createTextChunk(text),
+            subWordTextChunks: breakPatternIntoTextChunks(text)
+        };
+    }
+    // A segment is considered invalid if we couldn't find any words in it.
+    function segmentIsInvalid(segment) {
+        return segment.subWordTextChunks.length === 0;
+    }
+    function isUpperCaseLetter(ch) {
+        // Fast check for the ascii range.
+        if (ch >= 65 /* A */ && ch <= 90 /* Z */) {
+            return true;
+        }
+        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 2 /* Latest */)) {
+            return false;
+        }
+        // TODO: find a way to determine this for any unicode characters in a
+        // non-allocating manner.
+        var str = String.fromCharCode(ch);
+        return str === str.toUpperCase();
+    }
+    function isLowerCaseLetter(ch) {
+        // Fast check for the ascii range.
+        if (ch >= 97 /* a */ && ch <= 122 /* z */) {
+            return true;
+        }
+        if (ch < 127 /* maxAsciiCharacter */ || !ts.isUnicodeIdentifierStart(ch, 2 /* Latest */)) {
+            return false;
+        }
+        // TODO: find a way to determine this for any unicode characters in a
+        // non-allocating manner.
+        var str = String.fromCharCode(ch);
+        return str === str.toLowerCase();
+    }
+    function startsWith(string, search) {
+        for (var i = 0, n = search.length; i < n; i++) {
+            if (string.charCodeAt(i) !== search.charCodeAt(i)) {
+                return false;
+            }
+        }
+        return true;
+    }
+    // Assumes 'value' is already lowercase.
+    function indexOfIgnoringCase(string, value) {
+        for (var i = 0, n = string.length - value.length; i <= n; i++) {
+            if (startsWithIgnoringCase(string, value, i)) {
+                return i;
+            }
+        }
+        return -1;
+    }
+    // Assumes 'value' is already lowercase.
+    function startsWithIgnoringCase(string, value, start) {
+        for (var i = 0, n = value.length; i < n; i++) {
+            var ch1 = toLowerCase(string.charCodeAt(i + start));
+            var ch2 = value.charCodeAt(i);
+            if (ch1 !== ch2) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function toLowerCase(ch) {
+        // Fast convert for the ascii range.
+        if (ch >= 65 /* A */ && ch <= 90 /* Z */) {
+            return 97 /* a */ + (ch - 65 /* A */);
+        }
+        if (ch < 127 /* maxAsciiCharacter */) {
+            return ch;
+        }
+        // TODO: find a way to compute this for any unicode characters in a
+        // non-allocating manner.
+        return String.fromCharCode(ch).toLowerCase().charCodeAt(0);
+    }
+    function isDigit(ch) {
+        // TODO(cyrusn): Find a way to support this for unicode digits.
+        return ch >= 48 /* _0 */ && ch <= 57 /* _9 */;
+    }
+    function isWordChar(ch) {
+        return isUpperCaseLetter(ch) || isLowerCaseLetter(ch) || isDigit(ch) || ch === 95 /* _ */ || ch === 36 /* $ */;
+    }
+    function breakPatternIntoTextChunks(pattern) {
+        var result = [];
+        var wordStart = 0;
+        var wordLength = 0;
+        for (var i = 0; i < pattern.length; i++) {
+            var ch = pattern.charCodeAt(i);
+            if (isWordChar(ch)) {
+                if (wordLength === 0) {
+                    wordStart = i;
+                }
+                wordLength++;
+            }
+            else {
+                if (wordLength > 0) {
+                    result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
+                    wordLength = 0;
+                }
+            }
+        }
+        if (wordLength > 0) {
+            result.push(createTextChunk(pattern.substr(wordStart, wordLength)));
+        }
+        return result;
+    }
+    function createTextChunk(text) {
+        var textLowerCase = text.toLowerCase();
+        return {
+            text: text,
+            textLowerCase: textLowerCase,
+            isLowerCase: text === textLowerCase,
+            characterSpans: breakIntoCharacterSpans(text)
+        };
+    }
+    /* @internal */ function breakIntoCharacterSpans(identifier) {
+        return breakIntoSpans(identifier, /*word:*/ false);
+    }
+    ts.breakIntoCharacterSpans = breakIntoCharacterSpans;
+    /* @internal */ function breakIntoWordSpans(identifier) {
+        return breakIntoSpans(identifier, /*word:*/ true);
+    }
+    ts.breakIntoWordSpans = breakIntoWordSpans;
+    function breakIntoSpans(identifier, word) {
+        var result = [];
+        var wordStart = 0;
+        for (var i = 1, n = identifier.length; i < n; i++) {
+            var lastIsDigit = isDigit(identifier.charCodeAt(i - 1));
+            var currentIsDigit = isDigit(identifier.charCodeAt(i));
+            var hasTransitionFromLowerToUpper = transitionFromLowerToUpper(identifier, word, i);
+            var hasTransitionFromUpperToLower = transitionFromUpperToLower(identifier, word, i, wordStart);
+            if (charIsPunctuation(identifier.charCodeAt(i - 1)) ||
+                charIsPunctuation(identifier.charCodeAt(i)) ||
+                lastIsDigit !== currentIsDigit ||
+                hasTransitionFromLowerToUpper ||
+                hasTransitionFromUpperToLower) {
+                if (!isAllPunctuation(identifier, wordStart, i)) {
+                    result.push(ts.createTextSpan(wordStart, i - wordStart));
+                }
+                wordStart = i;
+            }
+        }
+        if (!isAllPunctuation(identifier, wordStart, identifier.length)) {
+            result.push(ts.createTextSpan(wordStart, identifier.length - wordStart));
+        }
+        return result;
+    }
+    function charIsPunctuation(ch) {
+        switch (ch) {
+            case 33 /* exclamation */:
+            case 34 /* doubleQuote */:
+            case 35 /* hash */:
+            case 37 /* percent */:
+            case 38 /* ampersand */:
+            case 39 /* singleQuote */:
+            case 40 /* openParen */:
+            case 41 /* closeParen */:
+            case 42 /* asterisk */:
+            case 44 /* comma */:
+            case 45 /* minus */:
+            case 46 /* dot */:
+            case 47 /* slash */:
+            case 58 /* colon */:
+            case 59 /* semicolon */:
+            case 63 /* question */:
+            case 64 /* at */:
+            case 91 /* openBracket */:
+            case 92 /* backslash */:
+            case 93 /* closeBracket */:
+            case 95 /* _ */:
+            case 123 /* openBrace */:
+            case 125 /* closeBrace */:
+                return true;
+        }
+        return false;
+    }
+    function isAllPunctuation(identifier, start, end) {
+        for (var i = start; i < end; i++) {
+            var ch = identifier.charCodeAt(i);
+            // We don't consider _ or $ as punctuation as there may be things with that name.
+            if (!charIsPunctuation(ch) || ch === 95 /* _ */ || ch === 36 /* $ */) {
+                return false;
+            }
+        }
+        return true;
+    }
+    function transitionFromUpperToLower(identifier, word, index, wordStart) {
+        if (word) {
+            // Cases this supports:
+            // 1) IDisposable -> I, Disposable
+            // 2) UIElement -> UI, Element
+            // 3) HTMLDocument -> HTML, Document
+            //
+            // etc.
+            if (index !== wordStart &&
+                index + 1 < identifier.length) {
+                var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
+                var nextIsLower = isLowerCaseLetter(identifier.charCodeAt(index + 1));
+                if (currentIsUpper && nextIsLower) {
+                    // We have a transition from an upper to a lower letter here.  But we only
+                    // want to break if all the letters that preceded are uppercase.  i.e. if we
+                    // have "Foo" we don't want to break that into "F, oo".  But if we have
+                    // "IFoo" or "UIFoo", then we want to break that into "I, Foo" and "UI,
+                    // Foo".  i.e. the last uppercase letter belongs to the lowercase letters
+                    // that follows.  Note: this will make the following not split properly:
+                    // "HELLOthere".  However, these sorts of names do not show up in .Net
+                    // programs.
+                    for (var i = wordStart; i < index; i++) {
+                        if (!isUpperCaseLetter(identifier.charCodeAt(i))) {
+                            return false;
+                        }
+                    }
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+    function transitionFromLowerToUpper(identifier, word, index) {
+        var lastIsUpper = isUpperCaseLetter(identifier.charCodeAt(index - 1));
+        var currentIsUpper = isUpperCaseLetter(identifier.charCodeAt(index));
+        // See if the casing indicates we're starting a new word. Note: if we're breaking on
+        // words, then just seeing an upper case character isn't enough.  Instead, it has to
+        // be uppercase and the previous character can't be uppercase.
+        //
+        // For example, breaking "AddMetadata" on words would make: Add Metadata
+        //
+        // on characters would be: A dd M etadata
+        //
+        // Break "AM" on words would be: AM
+        //
+        // on characters would be: A M
+        //
+        // We break the search string on characters.  But we break the symbol name on words.
+        var transition = word
+            ? (currentIsUpper && !lastIsUpper)
+            : currentIsUpper;
+        return transition;
+    }
+})(ts || (ts = {}));
+///<reference path='services.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var SignatureHelp;
+    (function (SignatureHelp) {
+        // A partially written generic type expression is not guaranteed to have the correct syntax tree. the expression could be parsed as less than/greater than expression or a comma expression
+        // or some other combination depending on what the user has typed so far. For the purposes of signature help we need to consider any location after "<" as a possible generic type reference.
+        // To do this, the method will back parse the expression starting at the position required. it will try to parse the current expression as a generic type expression, if it did succeed it
+        // will return the generic identifier that started the expression (e.g. "foo" in "foo<any, |"). It is then up to the caller to ensure that this is a valid generic expression through
+        // looking up the type. The method will also keep track of the parameter index inside the expression.
+        // public static isInPartiallyWrittenTypeArgumentList(syntaxTree: TypeScript.SyntaxTree, position: number): any {
+        //    let token = Syntax.findTokenOnLeft(syntaxTree.sourceUnit(), position, /*includeSkippedTokens*/ true);
+        //    if (token && TypeScript.Syntax.hasAncestorOfKind(token, TypeScript.SyntaxKind.TypeParameterList)) {
+        //        // We are in the wrong generic list. bail out
+        //        return null;
+        //    }
+        //    let stack = 0;
+        //    let argumentIndex = 0;
+        //    whileLoop:
+        //    while (token) {
+        //        switch (token.kind()) {
+        //            case TypeScript.SyntaxKind.LessThanToken:
+        //                if (stack === 0) {
+        //                    // Found the beginning of the generic argument expression
+        //                    let lessThanToken = token;
+        //                    token = previousToken(token, /*includeSkippedTokens*/ true);
+        //                    if (!token || token.kind() !== TypeScript.SyntaxKind.IdentifierName) {
+        //                        break whileLoop;
+        //                    }
+        //                    // Found the name, return the data
+        //                    return {
+        //                        genericIdentifer: token,
+        //                        lessThanToken: lessThanToken,
+        //                        argumentIndex: argumentIndex
+        //                    };
+        //                }
+        //                else if (stack < 0) {
+        //                    // Seen one too many less than tokens, bail out
+        //                    break whileLoop;
+        //                }
+        //                else {
+        //                    stack--;
+        //                }
+        //                break;
+        //            case TypeScript.SyntaxKind.GreaterThanGreaterThanGreaterThanToken:
+        //                stack++;
+        //            // Intentional fall through
+        //            case TypeScript.SyntaxKind.GreaterThanToken:
+        //                stack++;
+        //                break;
+        //            case TypeScript.SyntaxKind.CommaToken:
+        //                if (stack == 0) {
+        //                    argumentIndex++;
+        //                }
+        //                break;
+        //            case TypeScript.SyntaxKind.CloseBraceToken:
+        //                // This can be object type, skip untill we find the matching open brace token
+        //                let unmatchedOpenBraceTokens = 0;
+        //                // Skip untill the matching open brace token
+        //                token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseBraceToken, TypeScript.SyntaxKind.OpenBraceToken);
+        //                if (!token) {
+        //                    // No matching token was found. bail out
+        //                    break whileLoop;
+        //                }
+        //                break;
+        //            case TypeScript.SyntaxKind.EqualsGreaterThanToken:
+        //                // This can be a function type or a constructor type. In either case, we want to skip the function definition
+        //                token = previousToken(token, /*includeSkippedTokens*/ true);
+        //                if (token && token.kind() === TypeScript.SyntaxKind.CloseParenToken) {
+        //                    // Skip untill the matching open paren token
+        //                    token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.CloseParenToken, TypeScript.SyntaxKind.OpenParenToken);
+        //                    if (token && token.kind() === TypeScript.SyntaxKind.GreaterThanToken) {
+        //                        // Another generic type argument list, skip it\
+        //                        token = SignatureInfoHelpers.moveBackUpTillMatchingTokenKind(token, TypeScript.SyntaxKind.GreaterThanToken, TypeScript.SyntaxKind.LessThanToken);
+        //                    }
+        //                    if (token && token.kind() === TypeScript.SyntaxKind.NewKeyword) {
+        //                        // In case this was a constructor type, skip the new keyword
+        //                        token = previousToken(token, /*includeSkippedTokens*/ true);
+        //                    }
+        //                    if (!token) {
+        //                        // No matching token was found. bail out
+        //                        break whileLoop;
+        //                    }
+        //                }
+        //                else {
+        //                    // This is not a function type. exit the main loop
+        //                    break whileLoop;
+        //                }
+        //                break;
+        //            case TypeScript.SyntaxKind.IdentifierName:
+        //            case TypeScript.SyntaxKind.AnyKeyword:
+        //            case TypeScript.SyntaxKind.NumberKeyword:
+        //            case TypeScript.SyntaxKind.StringKeyword:
+        //            case TypeScript.SyntaxKind.VoidKeyword:
+        //            case TypeScript.SyntaxKind.BooleanKeyword:
+        //            case TypeScript.SyntaxKind.DotToken:
+        //            case TypeScript.SyntaxKind.OpenBracketToken:
+        //            case TypeScript.SyntaxKind.CloseBracketToken:
+        //                // Valid tokens in a type name. Skip.
+        //                break;
+        //            default:
+        //                break whileLoop;
+        //        }
+        //        token = previousToken(token, /*includeSkippedTokens*/ true);
+        //    }
+        //    return null;
+        // }
+        // private static moveBackUpTillMatchingTokenKind(token: TypeScript.ISyntaxToken, tokenKind: TypeScript.SyntaxKind, matchingTokenKind: TypeScript.SyntaxKind): TypeScript.ISyntaxToken {
+        //    if (!token || token.kind() !== tokenKind) {
+        //        throw TypeScript.Errors.invalidOperation();
+        //    }
+        //    // Skip the current token
+        //    token = previousToken(token, /*includeSkippedTokens*/ true);
+        //    let stack = 0;
+        //    while (token) {
+        //        if (token.kind() === matchingTokenKind) {
+        //            if (stack === 0) {
+        //                // Found the matching token, return
+        //                return token;
+        //            }
+        //            else if (stack < 0) {
+        //                // tokens overlapped.. bail out.
+        //                break;
+        //            }
+        //            else {
+        //                stack--;
+        //            }
+        //        }
+        //        else if (token.kind() === tokenKind) {
+        //            stack++;
+        //        }
+        //        // Move back
+        //        token = previousToken(token, /*includeSkippedTokens*/ true);
+        //    }
+        //    // Did not find matching token
+        //    return null;
+        // }
+        var emptyArray = [];
+        (function (ArgumentListKind) {
+            ArgumentListKind[ArgumentListKind["TypeArguments"] = 0] = "TypeArguments";
+            ArgumentListKind[ArgumentListKind["CallArguments"] = 1] = "CallArguments";
+            ArgumentListKind[ArgumentListKind["TaggedTemplateArguments"] = 2] = "TaggedTemplateArguments";
+        })(SignatureHelp.ArgumentListKind || (SignatureHelp.ArgumentListKind = {}));
+        var ArgumentListKind = SignatureHelp.ArgumentListKind;
+        function getSignatureHelpItems(program, sourceFile, position, cancellationToken) {
+            var typeChecker = program.getTypeChecker();
+            // Decide whether to show signature help
+            var startingToken = ts.findTokenOnLeftOfPosition(sourceFile, position);
+            if (!startingToken) {
+                // We are at the beginning of the file
+                return undefined;
+            }
+            var argumentInfo = getContainingArgumentInfo(startingToken, position, sourceFile);
+            cancellationToken.throwIfCancellationRequested();
+            // Semantic filtering of signature help
+            if (!argumentInfo) {
+                return undefined;
+            }
+            var call = argumentInfo.invocation;
+            var candidates = [];
+            var resolvedSignature = typeChecker.getResolvedSignature(call, candidates);
+            cancellationToken.throwIfCancellationRequested();
+            if (!candidates.length) {
+                // We didn't have any sig help items produced by the TS compiler.  If this is a JS
+                // file, then see if we can figure out anything better.
+                if (ts.isSourceFileJavaScript(sourceFile)) {
+                    return createJavaScriptSignatureHelpItems(argumentInfo, program);
+                }
+                return undefined;
+            }
+            return createSignatureHelpItems(candidates, resolvedSignature, argumentInfo, typeChecker);
+        }
+        SignatureHelp.getSignatureHelpItems = getSignatureHelpItems;
+        function createJavaScriptSignatureHelpItems(argumentInfo, program) {
+            if (argumentInfo.invocation.kind !== 174 /* CallExpression */) {
+                return undefined;
+            }
+            // See if we can find some symbol with the call expression name that has call signatures.
+            var callExpression = argumentInfo.invocation;
+            var expression = callExpression.expression;
+            var name = expression.kind === 69 /* Identifier */
+                ? expression
+                : expression.kind === 172 /* PropertyAccessExpression */
+                    ? expression.name
+                    : undefined;
+            if (!name || !name.text) {
+                return undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            for (var _i = 0, _a = program.getSourceFiles(); _i < _a.length; _i++) {
+                var sourceFile = _a[_i];
+                var nameToDeclarations = sourceFile.getNamedDeclarations();
+                var declarations = ts.getProperty(nameToDeclarations, name.text);
+                if (declarations) {
+                    for (var _b = 0, declarations_8 = declarations; _b < declarations_8.length; _b++) {
+                        var declaration = declarations_8[_b];
+                        var symbol = declaration.symbol;
+                        if (symbol) {
+                            var type = typeChecker.getTypeOfSymbolAtLocation(symbol, declaration);
+                            if (type) {
+                                var callSignatures = type.getCallSignatures();
+                                if (callSignatures && callSignatures.length) {
+                                    return createSignatureHelpItems(callSignatures, callSignatures[0], argumentInfo, typeChecker);
+                                }
+                            }
+                        }
+                    }
+                }
+            }
+        }
+        /**
+         * Returns relevant information for the argument list and the current argument if we are
+         * in the argument of an invocation; returns undefined otherwise.
+         */
+        function getImmediatelyContainingArgumentInfo(node, position, sourceFile) {
+            if (node.parent.kind === 174 /* CallExpression */ || node.parent.kind === 175 /* NewExpression */) {
+                var callExpression = node.parent;
+                // There are 3 cases to handle:
+                //   1. The token introduces a list, and should begin a sig help session
+                //   2. The token is either not associated with a list, or ends a list, so the session should end
+                //   3. The token is buried inside a list, and should give sig help
+                //
+                // The following are examples of each:
+                //
+                //    Case 1:
+                //          foo<#T, U>(#a, b)    -> The token introduces a list, and should begin a sig help session
+                //    Case 2:
+                //          fo#o<T, U>#(a, b)#   -> The token is either not associated with a list, or ends a list, so the session should end
+                //    Case 3:
+                //          foo<T#, U#>(a#, #b#) -> The token is buried inside a list, and should give sig help
+                // Find out if 'node' is an argument, a type argument, or neither
+                if (node.kind === 25 /* LessThanToken */ ||
+                    node.kind === 17 /* OpenParenToken */) {
+                    // Find the list that starts right *after* the < or ( token.
+                    // If the user has just opened a list, consider this item 0.
+                    var list = getChildListThatStartsWithOpenerToken(callExpression, node, sourceFile);
+                    var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
+                    ts.Debug.assert(list !== undefined);
+                    return {
+                        kind: isTypeArgList ? 0 /* TypeArguments */ : 1 /* CallArguments */,
+                        invocation: callExpression,
+                        argumentsSpan: getApplicableSpanForArguments(list, sourceFile),
+                        argumentIndex: 0,
+                        argumentCount: getArgumentCount(list)
+                    };
+                }
+                // findListItemInfo can return undefined if we are not in parent's argument list
+                // or type argument list. This includes cases where the cursor is:
+                //   - To the right of the closing paren, non-substitution template, or template tail.
+                //   - Between the type arguments and the arguments (greater than token)
+                //   - On the target of the call (parent.func)
+                //   - On the 'new' keyword in a 'new' expression
+                var listItemInfo = ts.findListItemInfo(node);
+                if (listItemInfo) {
+                    var list = listItemInfo.list;
+                    var isTypeArgList = callExpression.typeArguments && callExpression.typeArguments.pos === list.pos;
+                    var argumentIndex = getArgumentIndex(list, node);
+                    var argumentCount = getArgumentCount(list);
+                    ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
+                    return {
+                        kind: isTypeArgList ? 0 /* TypeArguments */ : 1 /* CallArguments */,
+                        invocation: callExpression,
+                        argumentsSpan: getApplicableSpanForArguments(list, sourceFile),
+                        argumentIndex: argumentIndex,
+                        argumentCount: argumentCount
+                    };
+                }
+                return undefined;
+            }
+            else if (node.kind === 11 /* NoSubstitutionTemplateLiteral */ && node.parent.kind === 176 /* TaggedTemplateExpression */) {
+                // Check if we're actually inside the template;
+                // otherwise we'll fall out and return undefined.
+                if (ts.isInsideTemplateLiteral(node, position)) {
+                    return getArgumentListInfoForTemplate(node.parent, /*argumentIndex*/ 0, sourceFile);
+                }
+            }
+            else if (node.kind === 12 /* TemplateHead */ && node.parent.parent.kind === 176 /* TaggedTemplateExpression */) {
+                var templateExpression = node.parent;
+                var tagExpression = templateExpression.parent;
+                ts.Debug.assert(templateExpression.kind === 189 /* TemplateExpression */);
+                var argumentIndex = ts.isInsideTemplateLiteral(node, position) ? 0 : 1;
+                return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
+            }
+            else if (node.parent.kind === 197 /* TemplateSpan */ && node.parent.parent.parent.kind === 176 /* TaggedTemplateExpression */) {
+                var templateSpan = node.parent;
+                var templateExpression = templateSpan.parent;
+                var tagExpression = templateExpression.parent;
+                ts.Debug.assert(templateExpression.kind === 189 /* TemplateExpression */);
+                // If we're just after a template tail, don't show signature help.
+                if (node.kind === 14 /* TemplateTail */ && !ts.isInsideTemplateLiteral(node, position)) {
+                    return undefined;
+                }
+                var spanIndex = templateExpression.templateSpans.indexOf(templateSpan);
+                var argumentIndex = getArgumentIndexForTemplatePiece(spanIndex, node, position);
+                return getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile);
+            }
+            return undefined;
+        }
+        function getArgumentIndex(argumentsList, node) {
+            // The list we got back can include commas.  In the presence of errors it may 
+            // also just have nodes without commas.  For example "Foo(a b c)" will have 3 
+            // args without commas.   We want to find what index we're at.  So we count
+            // forward until we hit ourselves, only incrementing the index if it isn't a
+            // comma.
+            //
+            // Note: the subtlety around trailing commas (in getArgumentCount) does not apply
+            // here.  That's because we're only walking forward until we hit the node we're
+            // on.  In that case, even if we're after the trailing comma, we'll still see
+            // that trailing comma in the list, and we'll have generated the appropriate
+            // arg index.
+            var argumentIndex = 0;
+            var listChildren = argumentsList.getChildren();
+            for (var _i = 0, listChildren_1 = listChildren; _i < listChildren_1.length; _i++) {
+                var child = listChildren_1[_i];
+                if (child === node) {
+                    break;
+                }
+                if (child.kind !== 24 /* CommaToken */) {
+                    argumentIndex++;
+                }
+            }
+            return argumentIndex;
+        }
+        function getArgumentCount(argumentsList) {
+            // The argument count for a list is normally the number of non-comma children it has.
+            // For example, if you have "Foo(a,b)" then there will be three children of the arg
+            // list 'a' '<comma>' 'b'.  So, in this case the arg count will be 2.  However, there
+            // is a small subtlety.  If you have  "Foo(a,)", then the child list will just have
+            // 'a' '<comma>'.  So, in the case where the last child is a comma, we increase the
+            // arg count by one to compensate.
+            //
+            // Note: this subtlety only applies to the last comma.  If you had "Foo(a,,"  then 
+            // we'll have:  'a' '<comma>' '<missing>' 
+            // That will give us 2 non-commas.  We then add one for the last comma, givin us an
+            // arg count of 3.
+            var listChildren = argumentsList.getChildren();
+            var argumentCount = ts.countWhere(listChildren, function (arg) { return arg.kind !== 24 /* CommaToken */; });
+            if (listChildren.length > 0 && ts.lastOrUndefined(listChildren).kind === 24 /* CommaToken */) {
+                argumentCount++;
+            }
+            return argumentCount;
+        }
+        // spanIndex is either the index for a given template span.
+        // This does not give appropriate results for a NoSubstitutionTemplateLiteral
+        function getArgumentIndexForTemplatePiece(spanIndex, node, position) {
+            // Because the TemplateStringsArray is the first argument, we have to offset each substitution expression by 1.
+            // There are three cases we can encounter:
+            //      1. We are precisely in the template literal (argIndex = 0).
+            //      2. We are in or to the right of the substitution expression (argIndex = spanIndex + 1).
+            //      3. We are directly to the right of the template literal, but because we look for the token on the left,
+            //          not enough to put us in the substitution expression; we should consider ourselves part of
+            //          the *next* span's expression by offsetting the index (argIndex = (spanIndex + 1) + 1).
+            //
+            // Example: f  `# abcd $#{#  1 + 1#  }# efghi ${ #"#hello"#  }  #  `
+            //              ^       ^ ^       ^   ^          ^ ^      ^     ^
+            // Case:        1       1 3       2   1          3 2      2     1
+            ts.Debug.assert(position >= node.getStart(), "Assumed 'position' could not occur before node.");
+            if (ts.isTemplateLiteralKind(node.kind)) {
+                if (ts.isInsideTemplateLiteral(node, position)) {
+                    return 0;
+                }
+                return spanIndex + 2;
+            }
+            return spanIndex + 1;
+        }
+        function getArgumentListInfoForTemplate(tagExpression, argumentIndex, sourceFile) {
+            // argumentCount is either 1 or (numSpans + 1) to account for the template strings array argument.
+            var argumentCount = tagExpression.template.kind === 11 /* NoSubstitutionTemplateLiteral */
+                ? 1
+                : tagExpression.template.templateSpans.length + 1;
+            ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
+            return {
+                kind: 2 /* TaggedTemplateArguments */,
+                invocation: tagExpression,
+                argumentsSpan: getApplicableSpanForTaggedTemplate(tagExpression, sourceFile),
+                argumentIndex: argumentIndex,
+                argumentCount: argumentCount
+            };
+        }
+        function getApplicableSpanForArguments(argumentsList, sourceFile) {
+            // We use full start and skip trivia on the end because we want to include trivia on
+            // both sides. For example,
+            //
+            //    foo(   /*comment */     a, b, c      /*comment*/     )
+            //        |                                               |
+            //
+            // The applicable span is from the first bar to the second bar (inclusive,
+            // but not including parentheses)
+            var applicableSpanStart = argumentsList.getFullStart();
+            var applicableSpanEnd = ts.skipTrivia(sourceFile.text, argumentsList.getEnd(), /*stopAfterLineBreak*/ false);
+            return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
+        }
+        function getApplicableSpanForTaggedTemplate(taggedTemplate, sourceFile) {
+            var template = taggedTemplate.template;
+            var applicableSpanStart = template.getStart();
+            var applicableSpanEnd = template.getEnd();
+            // We need to adjust the end position for the case where the template does not have a tail.
+            // Otherwise, we will not show signature help past the expression.
+            // For example,
+            //
+            //      `  ${ 1 + 1        foo(10)
+            //       |        |
+            //
+            // This is because a Missing node has no width. However, what we actually want is to include trivia
+            // leading up to the next token in case the user is about to type in a TemplateMiddle or TemplateTail.
+            if (template.kind === 189 /* TemplateExpression */) {
+                var lastSpan = ts.lastOrUndefined(template.templateSpans);
+                if (lastSpan.literal.getFullWidth() === 0) {
+                    applicableSpanEnd = ts.skipTrivia(sourceFile.text, applicableSpanEnd, /*stopAfterLineBreak*/ false);
+                }
+            }
+            return ts.createTextSpan(applicableSpanStart, applicableSpanEnd - applicableSpanStart);
+        }
+        function getContainingArgumentInfo(node, position, sourceFile) {
+            for (var n = node; n.kind !== 256 /* SourceFile */; n = n.parent) {
+                if (ts.isFunctionBlock(n)) {
+                    return undefined;
+                }
+                // If the node is not a subspan of its parent, this is a big problem.
+                // There have been crashes that might be caused by this violation.
+                if (n.pos < n.parent.pos || n.end > n.parent.end) {
+                    ts.Debug.fail("Node of kind " + n.kind + " is not a subspan of its parent of kind " + n.parent.kind);
+                }
+                var argumentInfo = getImmediatelyContainingArgumentInfo(n, position, sourceFile);
+                if (argumentInfo) {
+                    return argumentInfo;
+                }
+            }
+            return undefined;
+        }
+        SignatureHelp.getContainingArgumentInfo = getContainingArgumentInfo;
+        function getChildListThatStartsWithOpenerToken(parent, openerToken, sourceFile) {
+            var children = parent.getChildren(sourceFile);
+            var indexOfOpenerToken = children.indexOf(openerToken);
+            ts.Debug.assert(indexOfOpenerToken >= 0 && children.length > indexOfOpenerToken + 1);
+            return children[indexOfOpenerToken + 1];
+        }
+        /**
+         * The selectedItemIndex could be negative for several reasons.
+         *     1. There are too many arguments for all of the overloads
+         *     2. None of the overloads were type compatible
+         * The solution here is to try to pick the best overload by picking
+         * either the first one that has an appropriate number of parameters,
+         * or the one with the most parameters.
+         */
+        function selectBestInvalidOverloadIndex(candidates, argumentCount) {
+            var maxParamsSignatureIndex = -1;
+            var maxParams = -1;
+            for (var i = 0; i < candidates.length; i++) {
+                var candidate = candidates[i];
+                if (candidate.hasRestParameter || candidate.parameters.length >= argumentCount) {
+                    return i;
+                }
+                if (candidate.parameters.length > maxParams) {
+                    maxParams = candidate.parameters.length;
+                    maxParamsSignatureIndex = i;
+                }
+            }
+            return maxParamsSignatureIndex;
+        }
+        function createSignatureHelpItems(candidates, bestSignature, argumentListInfo, typeChecker) {
+            var applicableSpan = argumentListInfo.argumentsSpan;
+            var isTypeParameterList = argumentListInfo.kind === 0 /* TypeArguments */;
+            var invocation = argumentListInfo.invocation;
+            var callTarget = ts.getInvokedExpression(invocation);
+            var callTargetSymbol = typeChecker.getSymbolAtLocation(callTarget);
+            var callTargetDisplayParts = callTargetSymbol && ts.symbolToDisplayParts(typeChecker, callTargetSymbol, /*enclosingDeclaration*/ undefined, /*meaning*/ undefined);
+            var items = ts.map(candidates, function (candidateSignature) {
+                var signatureHelpParameters;
+                var prefixDisplayParts = [];
+                var suffixDisplayParts = [];
+                if (callTargetDisplayParts) {
+                    ts.addRange(prefixDisplayParts, callTargetDisplayParts);
+                }
+                if (isTypeParameterList) {
+                    prefixDisplayParts.push(ts.punctuationPart(25 /* LessThanToken */));
+                    var typeParameters = candidateSignature.typeParameters;
+                    signatureHelpParameters = typeParameters && typeParameters.length > 0 ? ts.map(typeParameters, createSignatureHelpParameterForTypeParameter) : emptyArray;
+                    suffixDisplayParts.push(ts.punctuationPart(27 /* GreaterThanToken */));
+                    var parameterParts = ts.mapToDisplayParts(function (writer) {
+                        return typeChecker.getSymbolDisplayBuilder().buildDisplayForParametersAndDelimiters(candidateSignature.thisType, candidateSignature.parameters, writer, invocation);
+                    });
+                    ts.addRange(suffixDisplayParts, parameterParts);
+                }
+                else {
+                    var typeParameterParts = ts.mapToDisplayParts(function (writer) {
+                        return typeChecker.getSymbolDisplayBuilder().buildDisplayForTypeParametersAndDelimiters(candidateSignature.typeParameters, writer, invocation);
+                    });
+                    ts.addRange(prefixDisplayParts, typeParameterParts);
+                    prefixDisplayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                    var parameters = candidateSignature.parameters;
+                    signatureHelpParameters = parameters.length > 0 ? ts.map(parameters, createSignatureHelpParameterForParameter) : emptyArray;
+                    suffixDisplayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                }
+                var returnTypeParts = ts.mapToDisplayParts(function (writer) {
+                    return typeChecker.getSymbolDisplayBuilder().buildReturnTypeDisplay(candidateSignature, writer, invocation);
+                });
+                ts.addRange(suffixDisplayParts, returnTypeParts);
+                return {
+                    isVariadic: candidateSignature.hasRestParameter,
+                    prefixDisplayParts: prefixDisplayParts,
+                    suffixDisplayParts: suffixDisplayParts,
+                    separatorDisplayParts: [ts.punctuationPart(24 /* CommaToken */), ts.spacePart()],
+                    parameters: signatureHelpParameters,
+                    documentation: candidateSignature.getDocumentationComment()
+                };
+            });
+            var argumentIndex = argumentListInfo.argumentIndex;
+            // argumentCount is the *apparent* number of arguments.
+            var argumentCount = argumentListInfo.argumentCount;
+            var selectedItemIndex = candidates.indexOf(bestSignature);
+            if (selectedItemIndex < 0) {
+                selectedItemIndex = selectBestInvalidOverloadIndex(candidates, argumentCount);
+            }
+            ts.Debug.assert(argumentIndex === 0 || argumentIndex < argumentCount, "argumentCount < argumentIndex, " + argumentCount + " < " + argumentIndex);
+            return {
+                items: items,
+                applicableSpan: applicableSpan,
+                selectedItemIndex: selectedItemIndex,
+                argumentIndex: argumentIndex,
+                argumentCount: argumentCount
+            };
+            function createSignatureHelpParameterForParameter(parameter) {
+                var displayParts = ts.mapToDisplayParts(function (writer) {
+                    return typeChecker.getSymbolDisplayBuilder().buildParameterDisplay(parameter, writer, invocation);
+                });
+                return {
+                    name: parameter.name,
+                    documentation: parameter.getDocumentationComment(),
+                    displayParts: displayParts,
+                    isOptional: typeChecker.isOptionalParameter(parameter.valueDeclaration)
+                };
+            }
+            function createSignatureHelpParameterForTypeParameter(typeParameter) {
+                var displayParts = ts.mapToDisplayParts(function (writer) {
+                    return typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(typeParameter, writer, invocation);
+                });
+                return {
+                    name: typeParameter.symbol.name,
+                    documentation: emptyArray,
+                    displayParts: displayParts,
+                    isOptional: false
+                };
+            }
+        }
+    })(SignatureHelp = ts.SignatureHelp || (ts.SignatureHelp = {}));
+})(ts || (ts = {}));
+// These utilities are common to multiple language service features.
+/* @internal */
+var ts;
+(function (ts) {
+    function getLineStartPositionForPosition(position, sourceFile) {
+        var lineStarts = sourceFile.getLineStarts();
+        var line = sourceFile.getLineAndCharacterOfPosition(position).line;
+        return lineStarts[line];
+    }
+    ts.getLineStartPositionForPosition = getLineStartPositionForPosition;
+    function rangeContainsRange(r1, r2) {
+        return startEndContainsRange(r1.pos, r1.end, r2);
+    }
+    ts.rangeContainsRange = rangeContainsRange;
+    function startEndContainsRange(start, end, range) {
+        return start <= range.pos && end >= range.end;
+    }
+    ts.startEndContainsRange = startEndContainsRange;
+    function rangeContainsStartEnd(range, start, end) {
+        return range.pos <= start && range.end >= end;
+    }
+    ts.rangeContainsStartEnd = rangeContainsStartEnd;
+    function rangeOverlapsWithStartEnd(r1, start, end) {
+        return startEndOverlapsWithStartEnd(r1.pos, r1.end, start, end);
+    }
+    ts.rangeOverlapsWithStartEnd = rangeOverlapsWithStartEnd;
+    function startEndOverlapsWithStartEnd(start1, end1, start2, end2) {
+        var start = Math.max(start1, start2);
+        var end = Math.min(end1, end2);
+        return start < end;
+    }
+    ts.startEndOverlapsWithStartEnd = startEndOverlapsWithStartEnd;
+    function positionBelongsToNode(candidate, position, sourceFile) {
+        return candidate.end > position || !isCompletedNode(candidate, sourceFile);
+    }
+    ts.positionBelongsToNode = positionBelongsToNode;
+    function isCompletedNode(n, sourceFile) {
+        if (ts.nodeIsMissing(n)) {
+            return false;
+        }
+        switch (n.kind) {
+            case 221 /* ClassDeclaration */:
+            case 222 /* InterfaceDeclaration */:
+            case 224 /* EnumDeclaration */:
+            case 171 /* ObjectLiteralExpression */:
+            case 167 /* ObjectBindingPattern */:
+            case 159 /* TypeLiteral */:
+            case 199 /* Block */:
+            case 226 /* ModuleBlock */:
+            case 227 /* CaseBlock */:
+                return nodeEndsWith(n, 16 /* CloseBraceToken */, sourceFile);
+            case 252 /* CatchClause */:
+                return isCompletedNode(n.block, sourceFile);
+            case 175 /* NewExpression */:
+                if (!n.arguments) {
+                    return true;
+                }
+            // fall through
+            case 174 /* CallExpression */:
+            case 178 /* ParenthesizedExpression */:
+            case 164 /* ParenthesizedType */:
+                return nodeEndsWith(n, 18 /* CloseParenToken */, sourceFile);
+            case 156 /* FunctionType */:
+            case 157 /* ConstructorType */:
+                return isCompletedNode(n.type, sourceFile);
+            case 148 /* Constructor */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+            case 220 /* FunctionDeclaration */:
+            case 179 /* FunctionExpression */:
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+            case 152 /* ConstructSignature */:
+            case 151 /* CallSignature */:
+            case 180 /* ArrowFunction */:
+                if (n.body) {
+                    return isCompletedNode(n.body, sourceFile);
+                }
+                if (n.type) {
+                    return isCompletedNode(n.type, sourceFile);
+                }
+                // Even though type parameters can be unclosed, we can get away with
+                // having at least a closing paren.
+                return hasChildOfKind(n, 18 /* CloseParenToken */, sourceFile);
+            case 225 /* ModuleDeclaration */:
+                return n.body && isCompletedNode(n.body, sourceFile);
+            case 203 /* IfStatement */:
+                if (n.elseStatement) {
+                    return isCompletedNode(n.elseStatement, sourceFile);
+                }
+                return isCompletedNode(n.thenStatement, sourceFile);
+            case 202 /* ExpressionStatement */:
+                return isCompletedNode(n.expression, sourceFile) ||
+                    hasChildOfKind(n, 23 /* SemicolonToken */);
+            case 170 /* ArrayLiteralExpression */:
+            case 168 /* ArrayBindingPattern */:
+            case 173 /* ElementAccessExpression */:
+            case 140 /* ComputedPropertyName */:
+            case 161 /* TupleType */:
+                return nodeEndsWith(n, 20 /* CloseBracketToken */, sourceFile);
+            case 153 /* IndexSignature */:
+                if (n.type) {
+                    return isCompletedNode(n.type, sourceFile);
+                }
+                return hasChildOfKind(n, 20 /* CloseBracketToken */, sourceFile);
+            case 249 /* CaseClause */:
+            case 250 /* DefaultClause */:
+                // there is no such thing as terminator token for CaseClause/DefaultClause so for simplicity always consider them non-completed
+                return false;
+            case 206 /* ForStatement */:
+            case 207 /* ForInStatement */:
+            case 208 /* ForOfStatement */:
+            case 205 /* WhileStatement */:
+                return isCompletedNode(n.statement, sourceFile);
+            case 204 /* DoStatement */:
+                // rough approximation: if DoStatement has While keyword - then if node is completed is checking the presence of ')';
+                var hasWhileKeyword = findChildOfKind(n, 104 /* WhileKeyword */, sourceFile);
+                if (hasWhileKeyword) {
+                    return nodeEndsWith(n, 18 /* CloseParenToken */, sourceFile);
+                }
+                return isCompletedNode(n.statement, sourceFile);
+            case 158 /* TypeQuery */:
+                return isCompletedNode(n.exprName, sourceFile);
+            case 182 /* TypeOfExpression */:
+            case 181 /* DeleteExpression */:
+            case 183 /* VoidExpression */:
+            case 190 /* YieldExpression */:
+            case 191 /* SpreadElementExpression */:
+                var unaryWordExpression = n;
+                return isCompletedNode(unaryWordExpression.expression, sourceFile);
+            case 176 /* TaggedTemplateExpression */:
+                return isCompletedNode(n.template, sourceFile);
+            case 189 /* TemplateExpression */:
+                var lastSpan = ts.lastOrUndefined(n.templateSpans);
+                return isCompletedNode(lastSpan, sourceFile);
+            case 197 /* TemplateSpan */:
+                return ts.nodeIsPresent(n.literal);
+            case 185 /* PrefixUnaryExpression */:
+                return isCompletedNode(n.operand, sourceFile);
+            case 187 /* BinaryExpression */:
+                return isCompletedNode(n.right, sourceFile);
+            case 188 /* ConditionalExpression */:
+                return isCompletedNode(n.whenFalse, sourceFile);
+            default:
+                return true;
+        }
+    }
+    ts.isCompletedNode = isCompletedNode;
+    /*
+     * Checks if node ends with 'expectedLastToken'.
+     * If child at position 'length - 1' is 'SemicolonToken' it is skipped and 'expectedLastToken' is compared with child at position 'length - 2'.
+     */
+    function nodeEndsWith(n, expectedLastToken, sourceFile) {
+        var children = n.getChildren(sourceFile);
+        if (children.length) {
+            var last = ts.lastOrUndefined(children);
+            if (last.kind === expectedLastToken) {
+                return true;
+            }
+            else if (last.kind === 23 /* SemicolonToken */ && children.length !== 1) {
+                return children[children.length - 2].kind === expectedLastToken;
+            }
+        }
+        return false;
+    }
+    function findListItemInfo(node) {
+        var list = findContainingList(node);
+        // It is possible at this point for syntaxList to be undefined, either if
+        // node.parent had no list child, or if none of its list children contained
+        // the span of node. If this happens, return undefined. The caller should
+        // handle this case.
+        if (!list) {
+            return undefined;
+        }
+        var children = list.getChildren();
+        var listItemIndex = ts.indexOf(children, node);
+        return {
+            listItemIndex: listItemIndex,
+            list: list
+        };
+    }
+    ts.findListItemInfo = findListItemInfo;
+    function hasChildOfKind(n, kind, sourceFile) {
+        return !!findChildOfKind(n, kind, sourceFile);
+    }
+    ts.hasChildOfKind = hasChildOfKind;
+    function findChildOfKind(n, kind, sourceFile) {
+        return ts.forEach(n.getChildren(sourceFile), function (c) { return c.kind === kind && c; });
+    }
+    ts.findChildOfKind = findChildOfKind;
+    function findContainingList(node) {
+        // The node might be a list element (nonsynthetic) or a comma (synthetic). Either way, it will
+        // be parented by the container of the SyntaxList, not the SyntaxList itself.
+        // In order to find the list item index, we first need to locate SyntaxList itself and then search
+        // for the position of the relevant node (or comma).
+        var syntaxList = ts.forEach(node.parent.getChildren(), function (c) {
+            // find syntax list that covers the span of the node
+            if (c.kind === 282 /* SyntaxList */ && c.pos <= node.pos && c.end >= node.end) {
+                return c;
+            }
+        });
+        // Either we didn't find an appropriate list, or the list must contain us.
+        ts.Debug.assert(!syntaxList || ts.contains(syntaxList.getChildren(), node));
+        return syntaxList;
+    }
+    ts.findContainingList = findContainingList;
+    /* Gets the token whose text has range [start, end) and
+     * position >= start and (position < end or (position === end && token is keyword or identifier))
+     */
+    function getTouchingWord(sourceFile, position, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTouchingToken(sourceFile, position, function (n) { return isWord(n.kind); }, includeJsDocComment);
+    }
+    ts.getTouchingWord = getTouchingWord;
+    /* Gets the token whose text has range [start, end) and position >= start
+     * and (position < end or (position === end && token is keyword or identifier or numeric/string literal))
+     */
+    function getTouchingPropertyName(sourceFile, position, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTouchingToken(sourceFile, position, function (n) { return isPropertyName(n.kind); }, includeJsDocComment);
+    }
+    ts.getTouchingPropertyName = getTouchingPropertyName;
+    /** Returns the token if position is in [start, end) or if position === end and includeItemAtEndPosition(token) === true */
+    function getTouchingToken(sourceFile, position, includeItemAtEndPosition, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ false, includeItemAtEndPosition, includeJsDocComment);
+    }
+    ts.getTouchingToken = getTouchingToken;
+    /** Returns a token if position is in [start-of-leading-trivia, end) */
+    function getTokenAtPosition(sourceFile, position, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        return getTokenAtPositionWorker(sourceFile, position, /*allowPositionInLeadingTrivia*/ true, /*includeItemAtEndPosition*/ undefined, includeJsDocComment);
+    }
+    ts.getTokenAtPosition = getTokenAtPosition;
+    /** Get the token whose text contains the position */
+    function getTokenAtPositionWorker(sourceFile, position, allowPositionInLeadingTrivia, includeItemAtEndPosition, includeJsDocComment) {
+        if (includeJsDocComment === void 0) { includeJsDocComment = false; }
+        var current = sourceFile;
+        outer: while (true) {
+            if (isToken(current)) {
+                // exit early
+                return current;
+            }
+            if (includeJsDocComment) {
+                var jsDocChildren = ts.filter(current.getChildren(), ts.isJSDocNode);
+                for (var _i = 0, jsDocChildren_1 = jsDocChildren; _i < jsDocChildren_1.length; _i++) {
+                    var jsDocChild = jsDocChildren_1[_i];
+                    var start = allowPositionInLeadingTrivia ? jsDocChild.getFullStart() : jsDocChild.getStart(sourceFile, includeJsDocComment);
+                    if (start <= position) {
+                        var end = jsDocChild.getEnd();
+                        if (position < end || (position === end && jsDocChild.kind === 1 /* EndOfFileToken */)) {
+                            current = jsDocChild;
+                            continue outer;
+                        }
+                        else if (includeItemAtEndPosition && end === position) {
+                            var previousToken = findPrecedingToken(position, sourceFile, jsDocChild);
+                            if (previousToken && includeItemAtEndPosition(previousToken)) {
+                                return previousToken;
+                            }
+                        }
+                    }
+                }
+            }
+            // find the child that contains 'position'
+            for (var i = 0, n = current.getChildCount(sourceFile); i < n; i++) {
+                var child = current.getChildAt(i);
+                // all jsDocComment nodes were already visited
+                if (ts.isJSDocNode(child)) {
+                    continue;
+                }
+                var start = allowPositionInLeadingTrivia ? child.getFullStart() : child.getStart(sourceFile, includeJsDocComment);
+                if (start <= position) {
+                    var end = child.getEnd();
+                    if (position < end || (position === end && child.kind === 1 /* EndOfFileToken */)) {
+                        current = child;
+                        continue outer;
+                    }
+                    else if (includeItemAtEndPosition && end === position) {
+                        var previousToken = findPrecedingToken(position, sourceFile, child);
+                        if (previousToken && includeItemAtEndPosition(previousToken)) {
+                            return previousToken;
+                        }
+                    }
+                }
+            }
+            return current;
+        }
+    }
+    /**
+      * The token on the left of the position is the token that strictly includes the position
+      * or sits to the left of the cursor if it is on a boundary. For example
+      *
+      *   fo|o               -> will return foo
+      *   foo <comment> |bar -> will return foo
+      *
+      */
+    function findTokenOnLeftOfPosition(file, position) {
+        // Ideally, getTokenAtPosition should return a token. However, it is currently
+        // broken, so we do a check to make sure the result was indeed a token.
+        var tokenAtPosition = getTokenAtPosition(file, position);
+        if (isToken(tokenAtPosition) && position > tokenAtPosition.getStart(file) && position < tokenAtPosition.getEnd()) {
+            return tokenAtPosition;
+        }
+        return findPrecedingToken(position, file);
+    }
+    ts.findTokenOnLeftOfPosition = findTokenOnLeftOfPosition;
+    function findNextToken(previousToken, parent) {
+        return find(parent);
+        function find(n) {
+            if (isToken(n) && n.pos === previousToken.end) {
+                // this is token that starts at the end of previous token - return it
+                return n;
+            }
+            var children = n.getChildren();
+            for (var _i = 0, children_1 = children; _i < children_1.length; _i++) {
+                var child = children_1[_i];
+                var shouldDiveInChildNode = 
+                // previous token is enclosed somewhere in the child
+                (child.pos <= previousToken.pos && child.end > previousToken.end) ||
+                    // previous token ends exactly at the beginning of child
+                    (child.pos === previousToken.end);
+                if (shouldDiveInChildNode && nodeHasTokens(child)) {
+                    return find(child);
+                }
+            }
+            return undefined;
+        }
+    }
+    ts.findNextToken = findNextToken;
+    function findPrecedingToken(position, sourceFile, startNode) {
+        return find(startNode || sourceFile);
+        function findRightmostToken(n) {
+            if (isToken(n) || n.kind === 244 /* JsxText */) {
+                return n;
+            }
+            var children = n.getChildren();
+            var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
+            return candidate && findRightmostToken(candidate);
+        }
+        function find(n) {
+            if (isToken(n) || n.kind === 244 /* JsxText */) {
+                return n;
+            }
+            var children = n.getChildren();
+            for (var i = 0, len = children.length; i < len; i++) {
+                var child = children[i];
+                // condition 'position < child.end' checks if child node end after the position
+                // in the example below this condition will be false for 'aaaa' and 'bbbb' and true for 'ccc'
+                // aaaa___bbbb___$__ccc
+                // after we found child node with end after the position we check if start of the node is after the position.
+                // if yes - then position is in the trivia and we need to look into the previous child to find the token in question.
+                // if no - position is in the node itself so we should recurse in it.
+                // NOTE: JsxText is a weird kind of node that can contain only whitespaces (since they are not counted as trivia).
+                // if this is the case - then we should assume that token in question is located in previous child.
+                if (position < child.end && (nodeHasTokens(child) || child.kind === 244 /* JsxText */)) {
+                    var start = child.getStart(sourceFile);
+                    var lookInPreviousChild = (start >= position) ||
+                        (child.kind === 244 /* JsxText */ && start === child.end); // whitespace only JsxText
+                    if (lookInPreviousChild) {
+                        // actual start of the node is past the position - previous token should be at the end of previous child
+                        var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ i);
+                        return candidate && findRightmostToken(candidate);
+                    }
+                    else {
+                        // candidate should be in this node
+                        return find(child);
+                    }
+                }
+            }
+            ts.Debug.assert(startNode !== undefined || n.kind === 256 /* SourceFile */);
+            // Here we know that none of child token nodes embrace the position,
+            // the only known case is when position is at the end of the file.
+            // Try to find the rightmost token in the file without filtering.
+            // Namely we are skipping the check: 'position < node.end'
+            if (children.length) {
+                var candidate = findRightmostChildNodeWithTokens(children, /*exclusiveStartPosition*/ children.length);
+                return candidate && findRightmostToken(candidate);
+            }
+        }
+        /// finds last node that is considered as candidate for search (isCandidate(node) === true) starting from 'exclusiveStartPosition'
+        function findRightmostChildNodeWithTokens(children, exclusiveStartPosition) {
+            for (var i = exclusiveStartPosition - 1; i >= 0; i--) {
+                if (nodeHasTokens(children[i])) {
+                    return children[i];
+                }
+            }
+        }
+    }
+    ts.findPrecedingToken = findPrecedingToken;
+    function isInString(sourceFile, position) {
+        var previousToken = findPrecedingToken(position, sourceFile);
+        if (previousToken &&
+            (previousToken.kind === 9 /* StringLiteral */ || previousToken.kind === 166 /* StringLiteralType */)) {
+            var start = previousToken.getStart();
+            var end = previousToken.getEnd();
+            // To be "in" one of these literals, the position has to be:
+            //   1. entirely within the token text.
+            //   2. at the end position of an unterminated token.
+            //   3. at the end of a regular expression (due to trailing flags like '/foo/g').
+            if (start < position && position < end) {
+                return true;
+            }
+            if (position === end) {
+                return !!previousToken.isUnterminated;
+            }
+        }
+        return false;
+    }
+    ts.isInString = isInString;
+    function isInComment(sourceFile, position) {
+        return isInCommentHelper(sourceFile, position, /*predicate*/ undefined);
+    }
+    ts.isInComment = isInComment;
+    /**
+     * returns true if the position is in between the open and close elements of an JSX expression.
+     */
+    function isInsideJsxElementOrAttribute(sourceFile, position) {
+        var token = getTokenAtPosition(sourceFile, position);
+        if (!token) {
+            return false;
+        }
+        if (token.kind === 244 /* JsxText */) {
+            return true;
+        }
+        // <div>Hello |</div>
+        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 244 /* JsxText */) {
+            return true;
+        }
+        // <div> { | </div> or <div a={| </div>
+        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 248 /* JsxExpression */) {
+            return true;
+        }
+        // <div> {
+        // |
+        // } < /div>
+        if (token && token.kind === 16 /* CloseBraceToken */ && token.parent.kind === 248 /* JsxExpression */) {
+            return true;
+        }
+        // <div>|</div>
+        if (token.kind === 25 /* LessThanToken */ && token.parent.kind === 245 /* JsxClosingElement */) {
+            return true;
+        }
+        return false;
+    }
+    ts.isInsideJsxElementOrAttribute = isInsideJsxElementOrAttribute;
+    function isInTemplateString(sourceFile, position) {
+        var token = getTokenAtPosition(sourceFile, position);
+        return ts.isTemplateLiteralKind(token.kind) && position > token.getStart(sourceFile);
+    }
+    ts.isInTemplateString = isInTemplateString;
+    /**
+     * Returns true if the cursor at position in sourceFile is within a comment that additionally
+     * satisfies predicate, and false otherwise.
+     */
+    function isInCommentHelper(sourceFile, position, predicate) {
+        var token = getTokenAtPosition(sourceFile, position);
+        if (token && position <= token.getStart(sourceFile)) {
+            var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
+            // The end marker of a single-line comment does not include the newline character.
+            // In the following case, we are inside a comment (^ denotes the cursor position):
+            //
+            //    // asdf   ^\n
+            //
+            // But for multi-line comments, we don't want to be inside the comment in the following case:
+            //
+            //    /* asdf */^
+            //
+            // Internally, we represent the end of the comment at the newline and closing '/', respectively.
+            return predicate ?
+                ts.forEach(commentRanges, function (c) { return c.pos < position &&
+                    (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end) &&
+                    predicate(c); }) :
+                ts.forEach(commentRanges, function (c) { return c.pos < position &&
+                    (c.kind == 2 /* SingleLineCommentTrivia */ ? position <= c.end : position < c.end); });
+        }
+        return false;
+    }
+    ts.isInCommentHelper = isInCommentHelper;
+    function hasDocComment(sourceFile, position) {
+        var token = getTokenAtPosition(sourceFile, position);
+        // First, we have to see if this position actually landed in a comment.
+        var commentRanges = ts.getLeadingCommentRanges(sourceFile.text, token.pos);
+        return ts.forEach(commentRanges, jsDocPrefix);
+        function jsDocPrefix(c) {
+            var text = sourceFile.text;
+            return text.length >= c.pos + 3 && text[c.pos] === "/" && text[c.pos + 1] === "*" && text[c.pos + 2] === "*";
+        }
+    }
+    ts.hasDocComment = hasDocComment;
+    /**
+     * Get the corresponding JSDocTag node if the position is in a jsDoc comment
+     */
+    function getJsDocTagAtPosition(sourceFile, position) {
+        var node = ts.getTokenAtPosition(sourceFile, position);
+        if (isToken(node)) {
+            switch (node.kind) {
+                case 102 /* VarKeyword */:
+                case 108 /* LetKeyword */:
+                case 74 /* ConstKeyword */:
+                    // if the current token is var, let or const, skip the VariableDeclarationList
+                    node = node.parent === undefined ? undefined : node.parent.parent;
+                    break;
+                default:
+                    node = node.parent;
+                    break;
+            }
+        }
+        if (node) {
+            if (node.jsDocComments) {
+                for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                    var jsDocComment = _a[_i];
+                    for (var _b = 0, _c = jsDocComment.tags; _b < _c.length; _b++) {
+                        var tag = _c[_b];
+                        if (tag.pos <= position && position <= tag.end) {
+                            return tag;
+                        }
+                    }
+                }
+            }
+        }
+        return undefined;
+    }
+    ts.getJsDocTagAtPosition = getJsDocTagAtPosition;
+    function nodeHasTokens(n) {
+        // If we have a token or node that has a non-zero width, it must have tokens.
+        // Note, that getWidth() does not take trivia into account.
+        return n.getWidth() !== 0;
+    }
+    function getNodeModifiers(node) {
+        var flags = ts.getCombinedNodeFlags(node);
+        var result = [];
+        if (flags & 8 /* Private */)
+            result.push(ts.ScriptElementKindModifier.privateMemberModifier);
+        if (flags & 16 /* Protected */)
+            result.push(ts.ScriptElementKindModifier.protectedMemberModifier);
+        if (flags & 4 /* Public */)
+            result.push(ts.ScriptElementKindModifier.publicMemberModifier);
+        if (flags & 32 /* Static */)
+            result.push(ts.ScriptElementKindModifier.staticModifier);
+        if (flags & 128 /* Abstract */)
+            result.push(ts.ScriptElementKindModifier.abstractModifier);
+        if (flags & 1 /* Export */)
+            result.push(ts.ScriptElementKindModifier.exportedModifier);
+        if (ts.isInAmbientContext(node))
+            result.push(ts.ScriptElementKindModifier.ambientModifier);
+        return result.length > 0 ? result.join(",") : ts.ScriptElementKindModifier.none;
+    }
+    ts.getNodeModifiers = getNodeModifiers;
+    function getTypeArgumentOrTypeParameterList(node) {
+        if (node.kind === 155 /* TypeReference */ || node.kind === 174 /* CallExpression */) {
+            return node.typeArguments;
+        }
+        if (ts.isFunctionLike(node) || node.kind === 221 /* ClassDeclaration */ || node.kind === 222 /* InterfaceDeclaration */) {
+            return node.typeParameters;
+        }
+        return undefined;
+    }
+    ts.getTypeArgumentOrTypeParameterList = getTypeArgumentOrTypeParameterList;
+    function isToken(n) {
+        return n.kind >= 0 /* FirstToken */ && n.kind <= 138 /* LastToken */;
+    }
+    ts.isToken = isToken;
+    function isWord(kind) {
+        return kind === 69 /* Identifier */ || ts.isKeyword(kind);
+    }
+    ts.isWord = isWord;
+    function isPropertyName(kind) {
+        return kind === 9 /* StringLiteral */ || kind === 8 /* NumericLiteral */ || isWord(kind);
+    }
+    function isComment(kind) {
+        return kind === 2 /* SingleLineCommentTrivia */ || kind === 3 /* MultiLineCommentTrivia */;
+    }
+    ts.isComment = isComment;
+    function isStringOrRegularExpressionOrTemplateLiteral(kind) {
+        if (kind === 9 /* StringLiteral */
+            || kind === 166 /* StringLiteralType */
+            || kind === 10 /* RegularExpressionLiteral */
+            || ts.isTemplateLiteralKind(kind)) {
+            return true;
+        }
+        return false;
+    }
+    ts.isStringOrRegularExpressionOrTemplateLiteral = isStringOrRegularExpressionOrTemplateLiteral;
+    function isPunctuation(kind) {
+        return 15 /* FirstPunctuation */ <= kind && kind <= 68 /* LastPunctuation */;
+    }
+    ts.isPunctuation = isPunctuation;
+    function isInsideTemplateLiteral(node, position) {
+        return ts.isTemplateLiteralKind(node.kind)
+            && (node.getStart() < position && position < node.getEnd()) || (!!node.isUnterminated && position === node.getEnd());
+    }
+    ts.isInsideTemplateLiteral = isInsideTemplateLiteral;
+    function isAccessibilityModifier(kind) {
+        switch (kind) {
+            case 112 /* PublicKeyword */:
+            case 110 /* PrivateKeyword */:
+            case 111 /* ProtectedKeyword */:
+                return true;
+        }
+        return false;
+    }
+    ts.isAccessibilityModifier = isAccessibilityModifier;
+    function compareDataObjects(dst, src) {
+        for (var e in dst) {
+            if (typeof dst[e] === "object") {
+                if (!compareDataObjects(dst[e], src[e])) {
+                    return false;
+                }
+            }
+            else if (typeof dst[e] !== "function") {
+                if (dst[e] !== src[e]) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+    ts.compareDataObjects = compareDataObjects;
+    function isArrayLiteralOrObjectLiteralDestructuringPattern(node) {
+        if (node.kind === 170 /* ArrayLiteralExpression */ ||
+            node.kind === 171 /* ObjectLiteralExpression */) {
+            // [a,b,c] from:
+            // [a, b, c] = someExpression;
+            if (node.parent.kind === 187 /* BinaryExpression */ &&
+                node.parent.left === node &&
+                node.parent.operatorToken.kind === 56 /* EqualsToken */) {
+                return true;
+            }
+            // [a, b, c] from:
+            // for([a, b, c] of expression)
+            if (node.parent.kind === 208 /* ForOfStatement */ &&
+                node.parent.initializer === node) {
+                return true;
+            }
+            // [a, b, c] of
+            // [x, [a, b, c] ] = someExpression
+            // or
+            // {x, a: {a, b, c} } = someExpression
+            if (isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.kind === 253 /* PropertyAssignment */ ? node.parent.parent : node.parent)) {
+                return true;
+            }
+        }
+        return false;
+    }
+    ts.isArrayLiteralOrObjectLiteralDestructuringPattern = isArrayLiteralOrObjectLiteralDestructuringPattern;
+})(ts || (ts = {}));
+// Display-part writer helpers
+/* @internal */
+var ts;
+(function (ts) {
+    function isFirstDeclarationOfSymbolParameter(symbol) {
+        return symbol.declarations && symbol.declarations.length > 0 && symbol.declarations[0].kind === 142 /* Parameter */;
+    }
+    ts.isFirstDeclarationOfSymbolParameter = isFirstDeclarationOfSymbolParameter;
+    var displayPartWriter = getDisplayPartWriter();
+    function getDisplayPartWriter() {
+        var displayParts;
+        var lineStart;
+        var indent;
+        resetWriter();
+        return {
+            displayParts: function () { return displayParts; },
+            writeKeyword: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.keyword); },
+            writeOperator: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.operator); },
+            writePunctuation: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.punctuation); },
+            writeSpace: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.space); },
+            writeStringLiteral: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.stringLiteral); },
+            writeParameter: function (text) { return writeKind(text, ts.SymbolDisplayPartKind.parameterName); },
+            writeSymbol: writeSymbol,
+            writeLine: writeLine,
+            increaseIndent: function () { indent++; },
+            decreaseIndent: function () { indent--; },
+            clear: resetWriter,
+            trackSymbol: function () { },
+            reportInaccessibleThisError: function () { }
+        };
+        function writeIndent() {
+            if (lineStart) {
+                var indentString = ts.getIndentString(indent);
+                if (indentString) {
+                    displayParts.push(displayPart(indentString, ts.SymbolDisplayPartKind.space));
+                }
+                lineStart = false;
+            }
+        }
+        function writeKind(text, kind) {
+            writeIndent();
+            displayParts.push(displayPart(text, kind));
+        }
+        function writeSymbol(text, symbol) {
+            writeIndent();
+            displayParts.push(symbolPart(text, symbol));
+        }
+        function writeLine() {
+            displayParts.push(lineBreakPart());
+            lineStart = true;
+        }
+        function resetWriter() {
+            displayParts = [];
+            lineStart = true;
+            indent = 0;
+        }
+    }
+    function symbolPart(text, symbol) {
+        return displayPart(text, displayPartKind(symbol), symbol);
+        function displayPartKind(symbol) {
+            var flags = symbol.flags;
+            if (flags & 3 /* Variable */) {
+                return isFirstDeclarationOfSymbolParameter(symbol) ? ts.SymbolDisplayPartKind.parameterName : ts.SymbolDisplayPartKind.localName;
+            }
+            else if (flags & 4 /* Property */) {
+                return ts.SymbolDisplayPartKind.propertyName;
+            }
+            else if (flags & 32768 /* GetAccessor */) {
+                return ts.SymbolDisplayPartKind.propertyName;
+            }
+            else if (flags & 65536 /* SetAccessor */) {
+                return ts.SymbolDisplayPartKind.propertyName;
+            }
+            else if (flags & 8 /* EnumMember */) {
+                return ts.SymbolDisplayPartKind.enumMemberName;
+            }
+            else if (flags & 16 /* Function */) {
+                return ts.SymbolDisplayPartKind.functionName;
+            }
+            else if (flags & 32 /* Class */) {
+                return ts.SymbolDisplayPartKind.className;
+            }
+            else if (flags & 64 /* Interface */) {
+                return ts.SymbolDisplayPartKind.interfaceName;
+            }
+            else if (flags & 384 /* Enum */) {
+                return ts.SymbolDisplayPartKind.enumName;
+            }
+            else if (flags & 1536 /* Module */) {
+                return ts.SymbolDisplayPartKind.moduleName;
+            }
+            else if (flags & 8192 /* Method */) {
+                return ts.SymbolDisplayPartKind.methodName;
+            }
+            else if (flags & 262144 /* TypeParameter */) {
+                return ts.SymbolDisplayPartKind.typeParameterName;
+            }
+            else if (flags & 524288 /* TypeAlias */) {
+                return ts.SymbolDisplayPartKind.aliasName;
+            }
+            else if (flags & 8388608 /* Alias */) {
+                return ts.SymbolDisplayPartKind.aliasName;
+            }
+            return ts.SymbolDisplayPartKind.text;
+        }
+    }
+    ts.symbolPart = symbolPart;
+    function displayPart(text, kind, symbol) {
+        return {
+            text: text,
+            kind: ts.SymbolDisplayPartKind[kind]
+        };
+    }
+    ts.displayPart = displayPart;
+    function spacePart() {
+        return displayPart(" ", ts.SymbolDisplayPartKind.space);
+    }
+    ts.spacePart = spacePart;
+    function keywordPart(kind) {
+        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.keyword);
+    }
+    ts.keywordPart = keywordPart;
+    function punctuationPart(kind) {
+        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.punctuation);
+    }
+    ts.punctuationPart = punctuationPart;
+    function operatorPart(kind) {
+        return displayPart(ts.tokenToString(kind), ts.SymbolDisplayPartKind.operator);
+    }
+    ts.operatorPart = operatorPart;
+    function textOrKeywordPart(text) {
+        var kind = ts.stringToToken(text);
+        return kind === undefined
+            ? textPart(text)
+            : keywordPart(kind);
+    }
+    ts.textOrKeywordPart = textOrKeywordPart;
+    function textPart(text) {
+        return displayPart(text, ts.SymbolDisplayPartKind.text);
+    }
+    ts.textPart = textPart;
+    var carriageReturnLineFeed = "\r\n";
+    /**
+     * The default is CRLF.
+     */
+    function getNewLineOrDefaultFromHost(host) {
+        return host.getNewLine ? host.getNewLine() : carriageReturnLineFeed;
+    }
+    ts.getNewLineOrDefaultFromHost = getNewLineOrDefaultFromHost;
+    function lineBreakPart() {
+        return displayPart("\n", ts.SymbolDisplayPartKind.lineBreak);
+    }
+    ts.lineBreakPart = lineBreakPart;
+    function mapToDisplayParts(writeDisplayParts) {
+        writeDisplayParts(displayPartWriter);
+        var result = displayPartWriter.displayParts();
+        displayPartWriter.clear();
+        return result;
+    }
+    ts.mapToDisplayParts = mapToDisplayParts;
+    function typeToDisplayParts(typechecker, type, enclosingDeclaration, flags) {
+        return mapToDisplayParts(function (writer) {
+            typechecker.getSymbolDisplayBuilder().buildTypeDisplay(type, writer, enclosingDeclaration, flags);
+        });
+    }
+    ts.typeToDisplayParts = typeToDisplayParts;
+    function symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration, meaning, flags) {
+        return mapToDisplayParts(function (writer) {
+            typeChecker.getSymbolDisplayBuilder().buildSymbolDisplay(symbol, writer, enclosingDeclaration, meaning, flags);
+        });
+    }
+    ts.symbolToDisplayParts = symbolToDisplayParts;
+    function signatureToDisplayParts(typechecker, signature, enclosingDeclaration, flags) {
+        return mapToDisplayParts(function (writer) {
+            typechecker.getSymbolDisplayBuilder().buildSignatureDisplay(signature, writer, enclosingDeclaration, flags);
+        });
+    }
+    ts.signatureToDisplayParts = signatureToDisplayParts;
+    function getDeclaredName(typeChecker, symbol, location) {
+        // If this is an export or import specifier it could have been renamed using the 'as' syntax.
+        // If so we want to search for whatever is under the cursor.
+        if (isImportOrExportSpecifierName(location)) {
+            return location.getText();
+        }
+        else if (ts.isStringOrNumericLiteral(location.kind) &&
+            location.parent.kind === 140 /* ComputedPropertyName */) {
+            return location.text;
+        }
+        // Try to get the local symbol if we're dealing with an 'export default'
+        // since that symbol has the "true" name.
+        var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
+        var name = typeChecker.symbolToString(localExportDefaultSymbol || symbol);
+        return name;
+    }
+    ts.getDeclaredName = getDeclaredName;
+    function isImportOrExportSpecifierName(location) {
+        return location.parent &&
+            (location.parent.kind === 234 /* ImportSpecifier */ || location.parent.kind === 238 /* ExportSpecifier */) &&
+            location.parent.propertyName === location;
+    }
+    ts.isImportOrExportSpecifierName = isImportOrExportSpecifierName;
+    /**
+     * Strip off existed single quotes or double quotes from a given string
+     *
+     * @return non-quoted string
+     */
+    function stripQuotes(name) {
+        var length = name.length;
+        if (length >= 2 &&
+            name.charCodeAt(0) === name.charCodeAt(length - 1) &&
+            (name.charCodeAt(0) === 34 /* doubleQuote */ || name.charCodeAt(0) === 39 /* singleQuote */)) {
+            return name.substring(1, length - 1);
+        }
+        ;
+        return name;
+    }
+    ts.stripQuotes = stripQuotes;
+    function scriptKindIs(fileName, host) {
+        var scriptKinds = [];
+        for (var _i = 2; _i < arguments.length; _i++) {
+            scriptKinds[_i - 2] = arguments[_i];
+        }
+        var scriptKind = getScriptKind(fileName, host);
+        return ts.forEach(scriptKinds, function (k) { return k === scriptKind; });
+    }
+    ts.scriptKindIs = scriptKindIs;
+    function getScriptKind(fileName, host) {
+        // First check to see if the script kind was specified by the host. Chances are the host
+        // may override the default script kind for the file extension.
+        var scriptKind;
+        if (host && host.getScriptKind) {
+            scriptKind = host.getScriptKind(fileName);
+        }
+        if (!scriptKind || scriptKind === 0 /* Unknown */) {
+            scriptKind = ts.getScriptKindFromFileName(fileName);
+        }
+        return ts.ensureScriptKind(fileName, scriptKind);
+    }
+    ts.getScriptKind = getScriptKind;
+})(ts || (ts = {}));
+// Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0.
+// See LICENSE.txt in the project root for complete license information.
+/// <reference path='services.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var JsTyping;
+    (function (JsTyping) {
+        ;
+        ;
+        // A map of loose file names to library names
+        // that we are confident require typings
+        var safeList;
+        /**
+         * @param host is the object providing I/O related operations.
+         * @param fileNames are the file names that belong to the same project
+         * @param projectRootPath is the path to the project root directory
+         * @param safeListPath is the path used to retrieve the safe list
+         * @param packageNameToTypingLocation is the map of package names to their cached typing locations
+         * @param typingOptions are used to customize the typing inference process
+         * @param compilerOptions are used as a source for typing inference
+         */
+        function discoverTypings(host, fileNames, projectRootPath, safeListPath, packageNameToTypingLocation, typingOptions, compilerOptions) {
+            // A typing name to typing file path mapping
+            var inferredTypings = {};
+            if (!typingOptions || !typingOptions.enableAutoDiscovery) {
+                return { cachedTypingPaths: [], newTypingNames: [], filesToWatch: [] };
+            }
+            // Only infer typings for .js and .jsx files
+            fileNames = ts.filter(ts.map(fileNames, ts.normalizePath), function (f) { return ts.scriptKindIs(f, /*LanguageServiceHost*/ undefined, 1 /* JS */, 2 /* JSX */); });
+            if (!safeList) {
+                var result = ts.readConfigFile(safeListPath, function (path) { return host.readFile(path); });
+                if (result.config) {
+                    safeList = result.config;
+                }
+                else {
+                    safeList = {};
+                }
+                ;
+            }
+            var filesToWatch = [];
+            // Directories to search for package.json, bower.json and other typing information
+            var searchDirs = [];
+            var exclude = [];
+            mergeTypings(typingOptions.include);
+            exclude = typingOptions.exclude || [];
+            var possibleSearchDirs = ts.map(fileNames, ts.getDirectoryPath);
+            if (projectRootPath !== undefined) {
+                possibleSearchDirs.push(projectRootPath);
+            }
+            searchDirs = ts.deduplicate(possibleSearchDirs);
+            for (var _i = 0, searchDirs_1 = searchDirs; _i < searchDirs_1.length; _i++) {
+                var searchDir = searchDirs_1[_i];
+                var packageJsonPath = ts.combinePaths(searchDir, "package.json");
+                getTypingNamesFromJson(packageJsonPath, filesToWatch);
+                var bowerJsonPath = ts.combinePaths(searchDir, "bower.json");
+                getTypingNamesFromJson(bowerJsonPath, filesToWatch);
+                var nodeModulesPath = ts.combinePaths(searchDir, "node_modules");
+                getTypingNamesFromNodeModuleFolder(nodeModulesPath);
+            }
+            getTypingNamesFromSourceFileNames(fileNames);
+            // Add the cached typing locations for inferred typings that are already installed
+            for (var name_38 in packageNameToTypingLocation) {
+                if (ts.hasProperty(inferredTypings, name_38) && !inferredTypings[name_38]) {
+                    inferredTypings[name_38] = packageNameToTypingLocation[name_38];
+                }
+            }
+            // Remove typings that the user has added to the exclude list
+            for (var _a = 0, exclude_1 = exclude; _a < exclude_1.length; _a++) {
+                var excludeTypingName = exclude_1[_a];
+                delete inferredTypings[excludeTypingName];
+            }
+            var newTypingNames = [];
+            var cachedTypingPaths = [];
+            for (var typing in inferredTypings) {
+                if (inferredTypings[typing] !== undefined) {
+                    cachedTypingPaths.push(inferredTypings[typing]);
+                }
+                else {
+                    newTypingNames.push(typing);
+                }
+            }
+            return { cachedTypingPaths: cachedTypingPaths, newTypingNames: newTypingNames, filesToWatch: filesToWatch };
+            /**
+             * Merge a given list of typingNames to the inferredTypings map
+             */
+            function mergeTypings(typingNames) {
+                if (!typingNames) {
+                    return;
+                }
+                for (var _i = 0, typingNames_1 = typingNames; _i < typingNames_1.length; _i++) {
+                    var typing = typingNames_1[_i];
+                    if (!ts.hasProperty(inferredTypings, typing)) {
+                        inferredTypings[typing] = undefined;
+                    }
+                }
+            }
+            /**
+             * Get the typing info from common package manager json files like package.json or bower.json
+             */
+            function getTypingNamesFromJson(jsonPath, filesToWatch) {
+                var result = ts.readConfigFile(jsonPath, function (path) { return host.readFile(path); });
+                if (result.config) {
+                    var jsonConfig = result.config;
+                    filesToWatch.push(jsonPath);
+                    if (jsonConfig.dependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.dependencies));
+                    }
+                    if (jsonConfig.devDependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.devDependencies));
+                    }
+                    if (jsonConfig.optionalDependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.optionalDependencies));
+                    }
+                    if (jsonConfig.peerDependencies) {
+                        mergeTypings(ts.getKeys(jsonConfig.peerDependencies));
+                    }
+                }
+            }
+            /**
+             * Infer typing names from given file names. For example, the file name "jquery-min.2.3.4.js"
+             * should be inferred to the 'jquery' typing name; and "angular-route.1.2.3.js" should be inferred
+             * to the 'angular-route' typing name.
+             * @param fileNames are the names for source files in the project
+             */
+            function getTypingNamesFromSourceFileNames(fileNames) {
+                var jsFileNames = ts.filter(fileNames, ts.hasJavaScriptFileExtension);
+                var inferredTypingNames = ts.map(jsFileNames, function (f) { return ts.removeFileExtension(ts.getBaseFileName(f.toLowerCase())); });
+                var cleanedTypingNames = ts.map(inferredTypingNames, function (f) { return f.replace(/((?:\.|-)min(?=\.|$))|((?:-|\.)\d+)/g, ""); });
+                if (safeList === undefined) {
+                    mergeTypings(cleanedTypingNames);
+                }
+                else {
+                    mergeTypings(ts.filter(cleanedTypingNames, function (f) { return ts.hasProperty(safeList, f); }));
+                }
+                var hasJsxFile = ts.forEach(fileNames, function (f) { return ts.scriptKindIs(f, /*LanguageServiceHost*/ undefined, 2 /* JSX */); });
+                if (hasJsxFile) {
+                    mergeTypings(["react"]);
+                }
+            }
+            /**
+             * Infer typing names from node_module folder
+             * @param nodeModulesPath is the path to the "node_modules" folder
+             */
+            function getTypingNamesFromNodeModuleFolder(nodeModulesPath) {
+                // Todo: add support for ModuleResolutionHost too
+                if (!host.directoryExists(nodeModulesPath)) {
+                    return;
+                }
+                var typingNames = [];
+                var fileNames = host.readDirectory(nodeModulesPath, "*.json", /*exclude*/ undefined, /*depth*/ 2);
+                for (var _i = 0, fileNames_1 = fileNames; _i < fileNames_1.length; _i++) {
+                    var fileName = fileNames_1[_i];
+                    var normalizedFileName = ts.normalizePath(fileName);
+                    if (ts.getBaseFileName(normalizedFileName) !== "package.json") {
+                        continue;
+                    }
+                    var result = ts.readConfigFile(normalizedFileName, function (path) { return host.readFile(path); });
+                    if (!result.config) {
+                        continue;
+                    }
+                    var packageJson = result.config;
+                    // npm 3's package.json contains a "_requiredBy" field
+                    // we should include all the top level module names for npm 2, and only module names whose
+                    // "_requiredBy" field starts with "#" or equals "/" for npm 3.
+                    if (packageJson._requiredBy &&
+                        ts.filter(packageJson._requiredBy, function (r) { return r[0] === "#" || r === "/"; }).length === 0) {
+                        continue;
+                    }
+                    // If the package has its own d.ts typings, those will take precedence. Otherwise the package name will be used
+                    // to download d.ts files from DefinitelyTyped
+                    if (!packageJson.name) {
+                        continue;
+                    }
+                    if (packageJson.typings) {
+                        var absolutePath = ts.getNormalizedAbsolutePath(packageJson.typings, ts.getDirectoryPath(normalizedFileName));
+                        inferredTypings[packageJson.name] = absolutePath;
+                    }
+                    else {
+                        typingNames.push(packageJson.name);
+                    }
+                }
+                mergeTypings(typingNames);
+            }
+        }
+        JsTyping.discoverTypings = discoverTypings;
+    })(JsTyping = ts.JsTyping || (ts.JsTyping = {}));
+})(ts || (ts = {}));
+/// <reference path="formatting.ts"/>
+/// <reference path="..\..\compiler\scanner.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var standardScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, 0 /* Standard */);
+        var jsxScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, 1 /* JSX */);
+        /**
+         * Scanner that is currently used for formatting
+         */
+        var scanner;
+        var ScanAction;
+        (function (ScanAction) {
+            ScanAction[ScanAction["Scan"] = 0] = "Scan";
+            ScanAction[ScanAction["RescanGreaterThanToken"] = 1] = "RescanGreaterThanToken";
+            ScanAction[ScanAction["RescanSlashToken"] = 2] = "RescanSlashToken";
+            ScanAction[ScanAction["RescanTemplateToken"] = 3] = "RescanTemplateToken";
+            ScanAction[ScanAction["RescanJsxIdentifier"] = 4] = "RescanJsxIdentifier";
+        })(ScanAction || (ScanAction = {}));
+        function getFormattingScanner(sourceFile, startPos, endPos) {
+            ts.Debug.assert(scanner === undefined);
+            scanner = sourceFile.languageVariant === 1 /* JSX */ ? jsxScanner : standardScanner;
+            scanner.setText(sourceFile.text);
+            scanner.setTextPos(startPos);
+            var wasNewLine = true;
+            var leadingTrivia;
+            var trailingTrivia;
+            var savedPos;
+            var lastScanAction;
+            var lastTokenInfo;
+            return {
+                advance: advance,
+                readTokenInfo: readTokenInfo,
+                isOnToken: isOnToken,
+                getCurrentLeadingTrivia: function () { return leadingTrivia; },
+                lastTrailingTriviaWasNewLine: function () { return wasNewLine; },
+                close: function () {
+                    ts.Debug.assert(scanner !== undefined);
+                    lastTokenInfo = undefined;
+                    scanner.setText(undefined);
+                    scanner = undefined;
+                }
+            };
+            function advance() {
+                ts.Debug.assert(scanner !== undefined);
+                lastTokenInfo = undefined;
+                var isStarted = scanner.getStartPos() !== startPos;
+                if (isStarted) {
+                    if (trailingTrivia) {
+                        ts.Debug.assert(trailingTrivia.length !== 0);
+                        wasNewLine = ts.lastOrUndefined(trailingTrivia).kind === 4 /* NewLineTrivia */;
+                    }
+                    else {
+                        wasNewLine = false;
+                    }
+                }
+                leadingTrivia = undefined;
+                trailingTrivia = undefined;
+                if (!isStarted) {
+                    scanner.scan();
+                }
+                var pos = scanner.getStartPos();
+                // Read leading trivia and token
+                while (pos < endPos) {
+                    var t = scanner.getToken();
+                    if (!ts.isTrivia(t)) {
+                        break;
+                    }
+                    // consume leading trivia
+                    scanner.scan();
+                    var item = {
+                        pos: pos,
+                        end: scanner.getStartPos(),
+                        kind: t
+                    };
+                    pos = scanner.getStartPos();
+                    if (!leadingTrivia) {
+                        leadingTrivia = [];
+                    }
+                    leadingTrivia.push(item);
+                }
+                savedPos = scanner.getStartPos();
+            }
+            function shouldRescanGreaterThanToken(node) {
+                if (node) {
+                    switch (node.kind) {
+                        case 29 /* GreaterThanEqualsToken */:
+                        case 64 /* GreaterThanGreaterThanEqualsToken */:
+                        case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                        case 45 /* GreaterThanGreaterThanGreaterThanToken */:
+                        case 44 /* GreaterThanGreaterThanToken */:
+                            return true;
+                    }
+                }
+                return false;
+            }
+            function shouldRescanJsxIdentifier(node) {
+                if (node.parent) {
+                    switch (node.parent.kind) {
+                        case 246 /* JsxAttribute */:
+                        case 243 /* JsxOpeningElement */:
+                        case 245 /* JsxClosingElement */:
+                        case 242 /* JsxSelfClosingElement */:
+                            return node.kind === 69 /* Identifier */;
+                    }
+                }
+                return false;
+            }
+            function shouldRescanSlashToken(container) {
+                return container.kind === 10 /* RegularExpressionLiteral */;
+            }
+            function shouldRescanTemplateToken(container) {
+                return container.kind === 13 /* TemplateMiddle */ ||
+                    container.kind === 14 /* TemplateTail */;
+            }
+            function startsWithSlashToken(t) {
+                return t === 39 /* SlashToken */ || t === 61 /* SlashEqualsToken */;
+            }
+            function readTokenInfo(n) {
+                ts.Debug.assert(scanner !== undefined);
+                if (!isOnToken()) {
+                    // scanner is not on the token (either advance was not called yet or scanner is already past the end position)
+                    return {
+                        leadingTrivia: leadingTrivia,
+                        trailingTrivia: undefined,
+                        token: undefined
+                    };
+                }
+                // normally scanner returns the smallest available token
+                // check the kind of context node to determine if scanner should have more greedy behavior and consume more text.
+                var expectedScanAction = shouldRescanGreaterThanToken(n)
+                    ? 1 /* RescanGreaterThanToken */
+                    : shouldRescanSlashToken(n)
+                        ? 2 /* RescanSlashToken */
+                        : shouldRescanTemplateToken(n)
+                            ? 3 /* RescanTemplateToken */
+                            : shouldRescanJsxIdentifier(n)
+                                ? 4 /* RescanJsxIdentifier */
+                                : 0 /* Scan */;
+                if (lastTokenInfo && expectedScanAction === lastScanAction) {
+                    // readTokenInfo was called before with the same expected scan action.
+                    // No need to re-scan text, return existing 'lastTokenInfo'
+                    // it is ok to call fixTokenKind here since it does not affect
+                    // what portion of text is consumed. In contrast rescanning can change it,
+                    // i.e. for '>=' when originally scanner eats just one character
+                    // and rescanning forces it to consume more.
+                    return fixTokenKind(lastTokenInfo, n);
+                }
+                if (scanner.getStartPos() !== savedPos) {
+                    ts.Debug.assert(lastTokenInfo !== undefined);
+                    // readTokenInfo was called before but scan action differs - rescan text
+                    scanner.setTextPos(savedPos);
+                    scanner.scan();
+                }
+                var currentToken = scanner.getToken();
+                if (expectedScanAction === 1 /* RescanGreaterThanToken */ && currentToken === 27 /* GreaterThanToken */) {
+                    currentToken = scanner.reScanGreaterToken();
+                    ts.Debug.assert(n.kind === currentToken);
+                    lastScanAction = 1 /* RescanGreaterThanToken */;
+                }
+                else if (expectedScanAction === 2 /* RescanSlashToken */ && startsWithSlashToken(currentToken)) {
+                    currentToken = scanner.reScanSlashToken();
+                    ts.Debug.assert(n.kind === currentToken);
+                    lastScanAction = 2 /* RescanSlashToken */;
+                }
+                else if (expectedScanAction === 3 /* RescanTemplateToken */ && currentToken === 16 /* CloseBraceToken */) {
+                    currentToken = scanner.reScanTemplateToken();
+                    lastScanAction = 3 /* RescanTemplateToken */;
+                }
+                else if (expectedScanAction === 4 /* RescanJsxIdentifier */ && currentToken === 69 /* Identifier */) {
+                    currentToken = scanner.scanJsxIdentifier();
+                    lastScanAction = 4 /* RescanJsxIdentifier */;
+                }
+                else {
+                    lastScanAction = 0 /* Scan */;
+                }
+                var token = {
+                    pos: scanner.getStartPos(),
+                    end: scanner.getTextPos(),
+                    kind: currentToken
+                };
+                // consume trailing trivia
+                if (trailingTrivia) {
+                    trailingTrivia = undefined;
+                }
+                while (scanner.getStartPos() < endPos) {
+                    currentToken = scanner.scan();
+                    if (!ts.isTrivia(currentToken)) {
+                        break;
+                    }
+                    var trivia = {
+                        pos: scanner.getStartPos(),
+                        end: scanner.getTextPos(),
+                        kind: currentToken
+                    };
+                    if (!trailingTrivia) {
+                        trailingTrivia = [];
+                    }
+                    trailingTrivia.push(trivia);
+                    if (currentToken === 4 /* NewLineTrivia */) {
+                        // move past new line
+                        scanner.scan();
+                        break;
+                    }
+                }
+                lastTokenInfo = {
+                    leadingTrivia: leadingTrivia,
+                    trailingTrivia: trailingTrivia,
+                    token: token
+                };
+                return fixTokenKind(lastTokenInfo, n);
+            }
+            function isOnToken() {
+                ts.Debug.assert(scanner !== undefined);
+                var current = (lastTokenInfo && lastTokenInfo.token.kind) || scanner.getToken();
+                var startPos = (lastTokenInfo && lastTokenInfo.token.pos) || scanner.getStartPos();
+                return startPos < endPos && current !== 1 /* EndOfFileToken */ && !ts.isTrivia(current);
+            }
+            // when containing node in the tree is token
+            // but its kind differs from the kind that was returned by the scanner,
+            // then kind needs to be fixed. This might happen in cases
+            // when parser interprets token differently, i.e keyword treated as identifier
+            function fixTokenKind(tokenInfo, container) {
+                if (ts.isToken(container) && tokenInfo.token.kind !== container.kind) {
+                    tokenInfo.token.kind = container.kind;
+                }
+                return tokenInfo;
+            }
+        }
+        formatting.getFormattingScanner = getFormattingScanner;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+/// <reference path="references.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var FormattingContext = (function () {
+            function FormattingContext(sourceFile, formattingRequestKind) {
+                this.sourceFile = sourceFile;
+                this.formattingRequestKind = formattingRequestKind;
+            }
+            FormattingContext.prototype.updateContext = function (currentRange, currentTokenParent, nextRange, nextTokenParent, commonParent) {
+                ts.Debug.assert(currentRange !== undefined, "currentTokenSpan is null");
+                ts.Debug.assert(currentTokenParent !== undefined, "currentTokenParent is null");
+                ts.Debug.assert(nextRange !== undefined, "nextTokenSpan is null");
+                ts.Debug.assert(nextTokenParent !== undefined, "nextTokenParent is null");
+                ts.Debug.assert(commonParent !== undefined, "commonParent is null");
+                this.currentTokenSpan = currentRange;
+                this.currentTokenParent = currentTokenParent;
+                this.nextTokenSpan = nextRange;
+                this.nextTokenParent = nextTokenParent;
+                this.contextNode = commonParent;
+                // drop cached results
+                this.contextNodeAllOnSameLine = undefined;
+                this.nextNodeAllOnSameLine = undefined;
+                this.tokensAreOnSameLine = undefined;
+                this.contextNodeBlockIsOnOneLine = undefined;
+                this.nextNodeBlockIsOnOneLine = undefined;
+            };
+            FormattingContext.prototype.ContextNodeAllOnSameLine = function () {
+                if (this.contextNodeAllOnSameLine === undefined) {
+                    this.contextNodeAllOnSameLine = this.NodeIsOnOneLine(this.contextNode);
+                }
+                return this.contextNodeAllOnSameLine;
+            };
+            FormattingContext.prototype.NextNodeAllOnSameLine = function () {
+                if (this.nextNodeAllOnSameLine === undefined) {
+                    this.nextNodeAllOnSameLine = this.NodeIsOnOneLine(this.nextTokenParent);
+                }
+                return this.nextNodeAllOnSameLine;
+            };
+            FormattingContext.prototype.TokensAreOnSameLine = function () {
+                if (this.tokensAreOnSameLine === undefined) {
+                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(this.currentTokenSpan.pos).line;
+                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(this.nextTokenSpan.pos).line;
+                    this.tokensAreOnSameLine = (startLine === endLine);
+                }
+                return this.tokensAreOnSameLine;
+            };
+            FormattingContext.prototype.ContextNodeBlockIsOnOneLine = function () {
+                if (this.contextNodeBlockIsOnOneLine === undefined) {
+                    this.contextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.contextNode);
+                }
+                return this.contextNodeBlockIsOnOneLine;
+            };
+            FormattingContext.prototype.NextNodeBlockIsOnOneLine = function () {
+                if (this.nextNodeBlockIsOnOneLine === undefined) {
+                    this.nextNodeBlockIsOnOneLine = this.BlockIsOnOneLine(this.nextTokenParent);
+                }
+                return this.nextNodeBlockIsOnOneLine;
+            };
+            FormattingContext.prototype.NodeIsOnOneLine = function (node) {
+                var startLine = this.sourceFile.getLineAndCharacterOfPosition(node.getStart(this.sourceFile)).line;
+                var endLine = this.sourceFile.getLineAndCharacterOfPosition(node.getEnd()).line;
+                return startLine === endLine;
+            };
+            FormattingContext.prototype.BlockIsOnOneLine = function (node) {
+                var openBrace = ts.findChildOfKind(node, 15 /* OpenBraceToken */, this.sourceFile);
+                var closeBrace = ts.findChildOfKind(node, 16 /* CloseBraceToken */, this.sourceFile);
+                if (openBrace && closeBrace) {
+                    var startLine = this.sourceFile.getLineAndCharacterOfPosition(openBrace.getEnd()).line;
+                    var endLine = this.sourceFile.getLineAndCharacterOfPosition(closeBrace.getStart(this.sourceFile)).line;
+                    return startLine === endLine;
+                }
+                return false;
+            };
+            return FormattingContext;
+        }());
+        formatting.FormattingContext = FormattingContext;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+/// <reference path="references.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        (function (FormattingRequestKind) {
+            FormattingRequestKind[FormattingRequestKind["FormatDocument"] = 0] = "FormatDocument";
+            FormattingRequestKind[FormattingRequestKind["FormatSelection"] = 1] = "FormatSelection";
+            FormattingRequestKind[FormattingRequestKind["FormatOnEnter"] = 2] = "FormatOnEnter";
+            FormattingRequestKind[FormattingRequestKind["FormatOnSemicolon"] = 3] = "FormatOnSemicolon";
+            FormattingRequestKind[FormattingRequestKind["FormatOnClosingCurlyBrace"] = 4] = "FormatOnClosingCurlyBrace";
+        })(formatting.FormattingRequestKind || (formatting.FormattingRequestKind = {}));
+        var FormattingRequestKind = formatting.FormattingRequestKind;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Rule = (function () {
+            function Rule(Descriptor, Operation, Flag) {
+                if (Flag === void 0) { Flag = 0 /* None */; }
+                this.Descriptor = Descriptor;
+                this.Operation = Operation;
+                this.Flag = Flag;
+            }
+            Rule.prototype.toString = function () {
+                return "[desc=" + this.Descriptor + "," +
+                    "operation=" + this.Operation + "," +
+                    "flag=" + this.Flag + "]";
+            };
+            return Rule;
+        }());
+        formatting.Rule = Rule;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        (function (RuleAction) {
+            RuleAction[RuleAction["Ignore"] = 1] = "Ignore";
+            RuleAction[RuleAction["Space"] = 2] = "Space";
+            RuleAction[RuleAction["NewLine"] = 4] = "NewLine";
+            RuleAction[RuleAction["Delete"] = 8] = "Delete";
+        })(formatting.RuleAction || (formatting.RuleAction = {}));
+        var RuleAction = formatting.RuleAction;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleDescriptor = (function () {
+            function RuleDescriptor(LeftTokenRange, RightTokenRange) {
+                this.LeftTokenRange = LeftTokenRange;
+                this.RightTokenRange = RightTokenRange;
+            }
+            RuleDescriptor.prototype.toString = function () {
+                return "[leftRange=" + this.LeftTokenRange + "," +
+                    "rightRange=" + this.RightTokenRange + "]";
+            };
+            RuleDescriptor.create1 = function (left, right) {
+                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), formatting.Shared.TokenRange.FromToken(right));
+            };
+            RuleDescriptor.create2 = function (left, right) {
+                return RuleDescriptor.create4(left, formatting.Shared.TokenRange.FromToken(right));
+            };
+            RuleDescriptor.create3 = function (left, right) {
+                return RuleDescriptor.create4(formatting.Shared.TokenRange.FromToken(left), right);
+            };
+            RuleDescriptor.create4 = function (left, right) {
+                return new RuleDescriptor(left, right);
+            };
+            return RuleDescriptor;
+        }());
+        formatting.RuleDescriptor = RuleDescriptor;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        (function (RuleFlags) {
+            RuleFlags[RuleFlags["None"] = 0] = "None";
+            RuleFlags[RuleFlags["CanDeleteNewLines"] = 1] = "CanDeleteNewLines";
+        })(formatting.RuleFlags || (formatting.RuleFlags = {}));
+        var RuleFlags = formatting.RuleFlags;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleOperation = (function () {
+            function RuleOperation(Context, Action) {
+                this.Context = Context;
+                this.Action = Action;
+            }
+            RuleOperation.prototype.toString = function () {
+                return "[context=" + this.Context + "," +
+                    "action=" + this.Action + "]";
+            };
+            RuleOperation.create1 = function (action) {
+                return RuleOperation.create2(formatting.RuleOperationContext.Any, action);
+            };
+            RuleOperation.create2 = function (context, action) {
+                return new RuleOperation(context, action);
+            };
+            return RuleOperation;
+        }());
+        formatting.RuleOperation = RuleOperation;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RuleOperationContext = (function () {
+            function RuleOperationContext() {
+                var funcs = [];
+                for (var _i = 0; _i < arguments.length; _i++) {
+                    funcs[_i - 0] = arguments[_i];
+                }
+                this.customContextChecks = funcs;
+            }
+            RuleOperationContext.prototype.IsAny = function () {
+                return this === RuleOperationContext.Any;
+            };
+            RuleOperationContext.prototype.InContext = function (context) {
+                if (this.IsAny()) {
+                    return true;
+                }
+                for (var _i = 0, _a = this.customContextChecks; _i < _a.length; _i++) {
+                    var check = _a[_i];
+                    if (!check(context)) {
+                        return false;
+                    }
+                }
+                return true;
+            };
+            RuleOperationContext.Any = new RuleOperationContext();
+            return RuleOperationContext;
+        }());
+        formatting.RuleOperationContext = RuleOperationContext;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Rules = (function () {
+            function Rules() {
+                ///
+                /// Common Rules
+                ///
+                // Leave comments alone
+                this.IgnoreBeforeComment = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.Comments), formatting.RuleOperation.create1(1 /* Ignore */));
+                this.IgnoreAfterLineComment = new formatting.Rule(formatting.RuleDescriptor.create3(2 /* SingleLineCommentTrivia */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create1(1 /* Ignore */));
+                // Space after keyword but not before ; or : or ?
+                this.NoSpaceBeforeSemicolon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 23 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeColon = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 54 /* ColonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                this.NoSpaceBeforeQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 53 /* QuestionToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                this.SpaceAfterColon = new formatting.Rule(formatting.RuleDescriptor.create3(54 /* ColonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterQuestionMarkInConditionalOperator = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsConditionalOperatorContext), 2 /* Space */));
+                this.NoSpaceAfterQuestionMark = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterSemicolon = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Space after }.
+                this.SpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16 /* CloseBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsAfterCodeBlockContext), 2 /* Space */));
+                // Special case for (}, else) and (}, while) since else & while tokens are not part of the tree which makes SpaceAfterCloseBrace rule not applied
+                this.SpaceBetweenCloseBraceAndElse = new formatting.Rule(formatting.RuleDescriptor.create1(16 /* CloseBraceToken */, 80 /* ElseKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBetweenCloseBraceAndWhile = new formatting.Rule(formatting.RuleDescriptor.create1(16 /* CloseBraceToken */, 104 /* WhileKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceAfterCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create3(16 /* CloseBraceToken */, formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 20 /* CloseBracketToken */, 24 /* CommaToken */, 23 /* SemicolonToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // No space for dot
+                this.NoSpaceBeforeDot = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 21 /* DotToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterDot = new formatting.Rule(formatting.RuleDescriptor.create3(21 /* DotToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // No space before and after indexer
+                this.NoSpaceBeforeOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 19 /* OpenBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create3(20 /* CloseBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBeforeBlockInFunctionDeclarationContext), 8 /* Delete */));
+                // Place a space before open brace in a function declaration
+                this.FunctionOpenBraceLeftTokenRange = formatting.Shared.TokenRange.AnyIncludingMultilineComments;
+                this.SpaceBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
+                // Place a space before open brace in a TypeScript declaration that has braces as children (class, module, enum, etc)
+                this.TypeScriptOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([69 /* Identifier */, 3 /* MultiLineCommentTrivia */, 73 /* ClassKeyword */]);
+                this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
+                // Place a space before open brace in a control flow construct
+                this.ControlOpenBraceLeftTokenRange = formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 3 /* MultiLineCommentTrivia */, 79 /* DoKeyword */, 100 /* TryKeyword */, 85 /* FinallyKeyword */, 80 /* ElseKeyword */]);
+                this.SpaceBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsNotFormatOnEnter, Rules.IsSameLineTokenOrBeforeMultilineBlockContext), 2 /* Space */), 1 /* CanDeleteNewLines */);
+                // Insert a space after { and before } in single-line contexts, but remove space from empty object literals {}.
+                this.SpaceAfterOpenBrace = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2 /* Space */));
+                this.SpaceBeforeCloseBrace = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsSingleLineBlockContext), 2 /* Space */));
+                this.NoSpaceBetweenEmptyBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15 /* OpenBraceToken */, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectContext), 8 /* Delete */));
+                // Insert new line after { and before } in multi-line contexts.
+                this.NewLineAfterOpenBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create3(15 /* OpenBraceToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
+                // For functions and control block place } on a new line    [multi-line rule]
+                this.NewLineBeforeCloseBraceInBlockContext = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.AnyIncludingMultilineComments, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsMultilineBlockContext), 4 /* NewLine */));
+                // Special handling of unary operators.
+                // Prefix operators generally shouldn't have a space between
+                // them and their target unary expression.
+                this.NoSpaceAfterUnaryPrefixOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.UnaryPrefixOperators, formatting.Shared.TokenRange.UnaryPrefixExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                this.NoSpaceAfterUnaryPreincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(41 /* PlusPlusToken */, formatting.Shared.TokenRange.UnaryPreincrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterUnaryPredecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create3(42 /* MinusMinusToken */, formatting.Shared.TokenRange.UnaryPredecrementExpressions), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeUnaryPostincrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostincrementExpressions, 41 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeUnaryPostdecrementOperator = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.UnaryPostdecrementExpressions, 42 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // More unary operator special-casing.
+                // DevDiv 181814:  Be careful when removing leading whitespace
+                // around unary operators.  Examples:
+                //      1 - -2  --X-->  1--2
+                //      a + ++b --X-->  a+++b
+                this.SpaceAfterPostincrementWhenFollowedByAdd = new formatting.Rule(formatting.RuleDescriptor.create1(41 /* PlusPlusToken */, 35 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterAddWhenFollowedByUnaryPlus = new formatting.Rule(formatting.RuleDescriptor.create1(35 /* PlusToken */, 35 /* PlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterAddWhenFollowedByPreincrement = new formatting.Rule(formatting.RuleDescriptor.create1(35 /* PlusToken */, 41 /* PlusPlusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterPostdecrementWhenFollowedBySubtract = new formatting.Rule(formatting.RuleDescriptor.create1(42 /* MinusMinusToken */, 36 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterSubtractWhenFollowedByUnaryMinus = new formatting.Rule(formatting.RuleDescriptor.create1(36 /* MinusToken */, 36 /* MinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterSubtractWhenFollowedByPredecrement = new formatting.Rule(formatting.RuleDescriptor.create1(36 /* MinusToken */, 42 /* MinusMinusToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.NoSpaceBeforeComma = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 24 /* CommaToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterCertainKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([102 /* VarKeyword */, 98 /* ThrowKeyword */, 92 /* NewKeyword */, 78 /* DeleteKeyword */, 94 /* ReturnKeyword */, 101 /* TypeOfKeyword */, 119 /* AwaitKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceAfterLetConstInVariableDeclaration = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([108 /* LetKeyword */, 74 /* ConstKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsStartOfVariableDeclarationList), 2 /* Space */));
+                this.NoSpaceBeforeOpenParenInFuncCall = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionCallOrNewContext, Rules.IsPreviousTokenNotComma), 8 /* Delete */));
+                this.SpaceAfterFunctionInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create3(87 /* FunctionKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
+                this.NoSpaceBeforeOpenParenInFuncDecl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsFunctionDeclContext), 8 /* Delete */));
+                this.SpaceAfterVoidOperator = new formatting.Rule(formatting.RuleDescriptor.create3(103 /* VoidKeyword */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsVoidOpContext), 2 /* Space */));
+                this.NoSpaceBetweenReturnAndSemicolon = new formatting.Rule(formatting.RuleDescriptor.create1(94 /* ReturnKeyword */, 23 /* SemicolonToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Add a space between statements. All keywords except (do,else,case) has open/close parens after them.
+                // So, we have a rule to add a space for [),Any], [do,Any], [else,Any], and [case,Any]
+                this.SpaceBetweenStatements = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 79 /* DoKeyword */, 80 /* ElseKeyword */, 71 /* CaseKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotForContext), 2 /* Space */));
+                // This low-pri rule takes care of "try {" and "finally {" in case the rule SpaceBeforeOpenBraceInControl didn't execute on FormatOnEnter.
+                this.SpaceAfterTryFinally = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([100 /* TryKeyword */, 85 /* FinallyKeyword */]), 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                //      get x() {}
+                //      set x(val) {}
+                this.SpaceAfterGetSetInMember = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([123 /* GetKeyword */, 131 /* SetKeyword */]), 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
+                // Special case for binary operators (that are keywords). For these we have to add a space and shouldn't follow any user options.
+                this.SpaceBeforeBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryKeywordOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterBinaryKeywordOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryKeywordOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                // TypeScript-specific higher priority rules
+                // Treat constructor as an identifier in a function declaration, and remove spaces between constructor and following left parentheses
+                this.NoSpaceAfterConstructor = new formatting.Rule(formatting.RuleDescriptor.create1(121 /* ConstructorKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Use of module as a function call. e.g.: import m2 = module("m2");
+                this.NoSpaceAfterModuleImport = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.FromTokens([125 /* ModuleKeyword */, 129 /* RequireKeyword */]), 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Add a space around certain TypeScript keywords
+                this.SpaceAfterCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([115 /* AbstractKeyword */, 73 /* ClassKeyword */, 122 /* DeclareKeyword */, 77 /* DefaultKeyword */, 81 /* EnumKeyword */, 82 /* ExportKeyword */, 83 /* ExtendsKeyword */, 123 /* GetKeyword */, 106 /* ImplementsKeyword */, 89 /* ImportKeyword */, 107 /* InterfaceKeyword */, 125 /* ModuleKeyword */, 126 /* NamespaceKeyword */, 110 /* PrivateKeyword */, 112 /* PublicKeyword */, 111 /* ProtectedKeyword */, 131 /* SetKeyword */, 113 /* StaticKeyword */, 134 /* TypeKeyword */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeCertainTypeScriptKeywords = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([83 /* ExtendsKeyword */, 106 /* ImplementsKeyword */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Treat string literals in module names as identifiers, and add a space between the literal and the opening Brace braces, e.g.: module "m2" {
+                this.SpaceAfterModuleName = new formatting.Rule(formatting.RuleDescriptor.create1(9 /* StringLiteral */, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsModuleDeclContext), 2 /* Space */));
+                // Lambda expressions
+                this.SpaceBeforeArrow = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 34 /* EqualsGreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceAfterArrow = new formatting.Rule(formatting.RuleDescriptor.create3(34 /* EqualsGreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Optional parameters and let args
+                this.NoSpaceAfterEllipsis = new formatting.Rule(formatting.RuleDescriptor.create1(22 /* DotDotDotToken */, 69 /* Identifier */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterOptionalParameters = new formatting.Rule(formatting.RuleDescriptor.create3(53 /* QuestionToken */, formatting.Shared.TokenRange.FromTokens([18 /* CloseParenToken */, 24 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNotBinaryOpContext), 8 /* Delete */));
+                // generics and type assertions
+                this.NoSpaceBeforeOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.TypeNames, 25 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceBetweenCloseParenAndAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create1(18 /* CloseParenToken */, 25 /* LessThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceAfterOpenAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(25 /* LessThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 27 /* GreaterThanToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceAfterCloseAngularBracket = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.FromTokens([17 /* OpenParenToken */, 19 /* OpenBracketToken */, 27 /* GreaterThanToken */, 24 /* CommaToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeArgumentOrParameterOrAssertionContext), 8 /* Delete */));
+                this.NoSpaceAfterTypeAssertion = new formatting.Rule(formatting.RuleDescriptor.create3(27 /* GreaterThanToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsTypeAssertionContext), 8 /* Delete */));
+                // Remove spaces in empty interface literals. e.g.: x: {}
+                this.NoSpaceBetweenEmptyInterfaceBraceBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(15 /* OpenBraceToken */, 16 /* CloseBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsObjectTypeContext), 8 /* Delete */));
+                // decorators
+                this.SpaceBeforeAt = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 55 /* AtToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceAfterAt = new formatting.Rule(formatting.RuleDescriptor.create3(55 /* AtToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterDecorator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([115 /* AbstractKeyword */, 69 /* Identifier */, 82 /* ExportKeyword */, 77 /* DefaultKeyword */, 73 /* ClassKeyword */, 113 /* StaticKeyword */, 112 /* PublicKeyword */, 110 /* PrivateKeyword */, 111 /* ProtectedKeyword */, 123 /* GetKeyword */, 131 /* SetKeyword */, 19 /* OpenBracketToken */, 37 /* AsteriskToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsEndOfDecoratorContextOnSameLine), 2 /* Space */));
+                this.NoSpaceBetweenFunctionKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 37 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 8 /* Delete */));
+                this.SpaceAfterStarInGeneratorDeclaration = new formatting.Rule(formatting.RuleDescriptor.create3(37 /* AsteriskToken */, formatting.Shared.TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclarationOrFunctionExpressionContext), 2 /* Space */));
+                this.NoSpaceBetweenYieldKeywordAndStar = new formatting.Rule(formatting.RuleDescriptor.create1(114 /* YieldKeyword */, 37 /* AsteriskToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 8 /* Delete */));
+                this.SpaceBetweenYieldOrYieldStarAndOperand = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([114 /* YieldKeyword */, 37 /* AsteriskToken */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsYieldOrYieldStarWithOperand), 2 /* Space */));
+                // Async-await
+                this.SpaceBetweenAsyncAndOpenParen = new formatting.Rule(formatting.RuleDescriptor.create1(118 /* AsyncKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsArrowFunctionContext, Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBetweenAsyncAndFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(118 /* AsyncKeyword */, 87 /* FunctionKeyword */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // template string
+                this.NoSpaceBetweenTagAndTemplateString = new formatting.Rule(formatting.RuleDescriptor.create3(69 /* Identifier */, formatting.Shared.TokenRange.FromTokens([11 /* NoSubstitutionTemplateLiteral */, 12 /* TemplateHead */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // These rules are higher in priority than user-configurable rules.
+                this.HighPriorityCommonRules = [
+                    this.IgnoreBeforeComment, this.IgnoreAfterLineComment,
+                    this.NoSpaceBeforeColon, this.SpaceAfterColon, this.NoSpaceBeforeQuestionMark, this.SpaceAfterQuestionMarkInConditionalOperator,
+                    this.NoSpaceAfterQuestionMark,
+                    this.NoSpaceBeforeDot, this.NoSpaceAfterDot,
+                    this.NoSpaceAfterUnaryPrefixOperator,
+                    this.NoSpaceAfterUnaryPreincrementOperator, this.NoSpaceAfterUnaryPredecrementOperator,
+                    this.NoSpaceBeforeUnaryPostincrementOperator, this.NoSpaceBeforeUnaryPostdecrementOperator,
+                    this.SpaceAfterPostincrementWhenFollowedByAdd,
+                    this.SpaceAfterAddWhenFollowedByUnaryPlus, this.SpaceAfterAddWhenFollowedByPreincrement,
+                    this.SpaceAfterPostdecrementWhenFollowedBySubtract,
+                    this.SpaceAfterSubtractWhenFollowedByUnaryMinus, this.SpaceAfterSubtractWhenFollowedByPredecrement,
+                    this.NoSpaceAfterCloseBrace,
+                    this.SpaceAfterOpenBrace, this.SpaceBeforeCloseBrace, this.NewLineBeforeCloseBraceInBlockContext,
+                    this.SpaceAfterCloseBrace, this.SpaceBetweenCloseBraceAndElse, this.SpaceBetweenCloseBraceAndWhile, this.NoSpaceBetweenEmptyBraceBrackets,
+                    this.NoSpaceBetweenFunctionKeywordAndStar, this.SpaceAfterStarInGeneratorDeclaration,
+                    this.SpaceAfterFunctionInFuncDecl, this.NewLineAfterOpenBraceInBlockContext, this.SpaceAfterGetSetInMember,
+                    this.NoSpaceBetweenYieldKeywordAndStar, this.SpaceBetweenYieldOrYieldStarAndOperand,
+                    this.NoSpaceBetweenReturnAndSemicolon,
+                    this.SpaceAfterCertainKeywords,
+                    this.SpaceAfterLetConstInVariableDeclaration,
+                    this.NoSpaceBeforeOpenParenInFuncCall,
+                    this.SpaceBeforeBinaryKeywordOperator, this.SpaceAfterBinaryKeywordOperator,
+                    this.SpaceAfterVoidOperator,
+                    this.SpaceBetweenAsyncAndOpenParen, this.SpaceBetweenAsyncAndFunctionKeyword,
+                    this.NoSpaceBetweenTagAndTemplateString,
+                    // TypeScript-specific rules
+                    this.NoSpaceAfterConstructor, this.NoSpaceAfterModuleImport,
+                    this.SpaceAfterCertainTypeScriptKeywords, this.SpaceBeforeCertainTypeScriptKeywords,
+                    this.SpaceAfterModuleName,
+                    this.SpaceBeforeArrow, this.SpaceAfterArrow,
+                    this.NoSpaceAfterEllipsis,
+                    this.NoSpaceAfterOptionalParameters,
+                    this.NoSpaceBetweenEmptyInterfaceBraceBrackets,
+                    this.NoSpaceBeforeOpenAngularBracket,
+                    this.NoSpaceBetweenCloseParenAndAngularBracket,
+                    this.NoSpaceAfterOpenAngularBracket,
+                    this.NoSpaceBeforeCloseAngularBracket,
+                    this.NoSpaceAfterCloseAngularBracket,
+                    this.NoSpaceAfterTypeAssertion,
+                    this.SpaceBeforeAt,
+                    this.NoSpaceAfterAt,
+                    this.SpaceAfterDecorator,
+                ];
+                // These rules are lower in priority than user-configurable rules.
+                this.LowPriorityCommonRules = [
+                    this.NoSpaceBeforeSemicolon,
+                    this.SpaceBeforeOpenBraceInControl, this.SpaceBeforeOpenBraceInFunction, this.SpaceBeforeOpenBraceInTypeScriptDeclWithBlock,
+                    this.NoSpaceBeforeComma,
+                    this.NoSpaceBeforeOpenBracket,
+                    this.NoSpaceAfterCloseBracket,
+                    this.SpaceAfterSemicolon,
+                    this.NoSpaceBeforeOpenParenInFuncDecl,
+                    this.SpaceBetweenStatements, this.SpaceAfterTryFinally
+                ];
+                ///
+                /// Rules controlled by user options
+                ///
+                // Insert space after comma delimiter
+                this.SpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsNextTokenNotCloseBracket), 2 /* Space */));
+                this.NoSpaceAfterComma = new formatting.Rule(formatting.RuleDescriptor.create3(24 /* CommaToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Insert space before and after binary operators
+                this.SpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.SpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 2 /* Space */));
+                this.NoSpaceBeforeBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.BinaryOperators), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
+                this.NoSpaceAfterBinaryOperator = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.BinaryOperators, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsBinaryOpContext), 8 /* Delete */));
+                // Insert space after keywords in control flow statements
+                this.SpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 2 /* Space */));
+                this.NoSpaceAfterKeywordInControl = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Keywords, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext), 8 /* Delete */));
+                // Open Brace braces after function
+                // TypeScript: Function can have return types, which can be made of tons of different token kinds
+                this.NewLineBeforeOpenBraceInFunction = new formatting.Rule(formatting.RuleDescriptor.create2(this.FunctionOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
+                // Open Brace braces after TypeScript module/class/interface
+                this.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock = new formatting.Rule(formatting.RuleDescriptor.create2(this.TypeScriptOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsTypeScriptDeclWithBlockContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
+                // Open Brace braces after control block
+                this.NewLineBeforeOpenBraceInControl = new formatting.Rule(formatting.RuleDescriptor.create2(this.ControlOpenBraceLeftTokenRange, 15 /* OpenBraceToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsControlDeclContext, Rules.IsBeforeMultilineBlockContext), 4 /* NewLine */), 1 /* CanDeleteNewLines */);
+                // Insert space after semicolon in for statement
+                this.SpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 2 /* Space */));
+                this.NoSpaceAfterSemicolonInFor = new formatting.Rule(formatting.RuleDescriptor.create3(23 /* SemicolonToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext, Rules.IsForContext), 8 /* Delete */));
+                // Insert space after opening and before closing nonempty parenthesis
+                this.SpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBetweenParens = new formatting.Rule(formatting.RuleDescriptor.create1(17 /* OpenParenToken */, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterOpenParen = new formatting.Rule(formatting.RuleDescriptor.create3(17 /* OpenParenToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseParen = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 18 /* CloseParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Insert space after opening and before closing nonempty brackets
+                this.SpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.SpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBetweenBrackets = new formatting.Rule(formatting.RuleDescriptor.create1(19 /* OpenBracketToken */, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceAfterOpenBracket = new formatting.Rule(formatting.RuleDescriptor.create3(19 /* OpenBracketToken */, formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.NoSpaceBeforeCloseBracket = new formatting.Rule(formatting.RuleDescriptor.create2(formatting.Shared.TokenRange.Any, 20 /* CloseBracketToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                // Insert space after opening and before closing template string braces
+                this.NoSpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12 /* TemplateHead */, 13 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceAfterTemplateHeadAndMiddle = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.FromTokens([12 /* TemplateHead */, 13 /* TemplateMiddle */]), formatting.Shared.TokenRange.Any), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                this.NoSpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13 /* TemplateMiddle */, 14 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 8 /* Delete */));
+                this.SpaceBeforeTemplateMiddleAndTail = new formatting.Rule(formatting.RuleDescriptor.create4(formatting.Shared.TokenRange.Any, formatting.Shared.TokenRange.FromTokens([13 /* TemplateMiddle */, 14 /* TemplateTail */])), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsNonJsxSameLineTokenContext), 2 /* Space */));
+                // Insert space after function keyword for anonymous functions
+                this.SpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 2 /* Space */));
+                this.NoSpaceAfterAnonymousFunctionKeyword = new formatting.Rule(formatting.RuleDescriptor.create1(87 /* FunctionKeyword */, 17 /* OpenParenToken */), formatting.RuleOperation.create2(new formatting.RuleOperationContext(Rules.IsFunctionDeclContext), 8 /* Delete */));
+            }
+            Rules.prototype.getRuleName = function (rule) {
+                var o = this;
+                for (var name_39 in o) {
+                    if (o[name_39] === rule) {
+                        return name_39;
+                    }
+                }
+                throw new Error("Unknown rule");
+            };
+            ///
+            /// Contexts
+            ///
+            Rules.IsForContext = function (context) {
+                return context.contextNode.kind === 206 /* ForStatement */;
+            };
+            Rules.IsNotForContext = function (context) {
+                return !Rules.IsForContext(context);
+            };
+            Rules.IsBinaryOpContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 187 /* BinaryExpression */:
+                    case 188 /* ConditionalExpression */:
+                    case 195 /* AsExpression */:
+                    case 154 /* TypePredicate */:
+                    case 162 /* UnionType */:
+                    case 163 /* IntersectionType */:
+                        return true;
+                    // equals in binding elements: function foo([[x, y] = [1, 2]])
+                    case 169 /* BindingElement */:
+                    // equals in type X = ...
+                    case 223 /* TypeAliasDeclaration */:
+                    // equal in import a = module('a');
+                    case 229 /* ImportEqualsDeclaration */:
+                    // equal in let a = 0;
+                    case 218 /* VariableDeclaration */:
+                    // equal in p = 0;
+                    case 142 /* Parameter */:
+                    case 255 /* EnumMember */:
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                        return context.currentTokenSpan.kind === 56 /* EqualsToken */ || context.nextTokenSpan.kind === 56 /* EqualsToken */;
+                    // "in" keyword in for (let x in []) { }
+                    case 207 /* ForInStatement */:
+                        return context.currentTokenSpan.kind === 90 /* InKeyword */ || context.nextTokenSpan.kind === 90 /* InKeyword */;
+                    // Technically, "of" is not a binary operator, but format it the same way as "in"
+                    case 208 /* ForOfStatement */:
+                        return context.currentTokenSpan.kind === 138 /* OfKeyword */ || context.nextTokenSpan.kind === 138 /* OfKeyword */;
+                }
+                return false;
+            };
+            Rules.IsNotBinaryOpContext = function (context) {
+                return !Rules.IsBinaryOpContext(context);
+            };
+            Rules.IsConditionalOperatorContext = function (context) {
+                return context.contextNode.kind === 188 /* ConditionalExpression */;
+            };
+            Rules.IsSameLineTokenOrBeforeMultilineBlockContext = function (context) {
+                //// This check is mainly used inside SpaceBeforeOpenBraceInControl and SpaceBeforeOpenBraceInFunction.
+                ////
+                //// Ex:
+                //// if (1)     { ....
+                ////      * ) and { are on the same line so apply the rule. Here we don't care whether it's same or multi block context
+                ////
+                //// Ex:
+                //// if (1)
+                //// { ... }
+                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we don't format.
+                ////
+                //// Ex:
+                //// if (1)
+                //// { ...
+                //// }
+                ////      * ) and { are on different lines. We only need to format if the block is multiline context. So in this case we format.
+                return context.TokensAreOnSameLine() || Rules.IsBeforeMultilineBlockContext(context);
+            };
+            // This check is done before an open brace in a control construct, a function, or a typescript block declaration
+            Rules.IsBeforeMultilineBlockContext = function (context) {
+                return Rules.IsBeforeBlockContext(context) && !(context.NextNodeAllOnSameLine() || context.NextNodeBlockIsOnOneLine());
+            };
+            Rules.IsMultilineBlockContext = function (context) {
+                return Rules.IsBlockContext(context) && !(context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
+            };
+            Rules.IsSingleLineBlockContext = function (context) {
+                return Rules.IsBlockContext(context) && (context.ContextNodeAllOnSameLine() || context.ContextNodeBlockIsOnOneLine());
+            };
+            Rules.IsBlockContext = function (context) {
+                return Rules.NodeIsBlockContext(context.contextNode);
+            };
+            Rules.IsBeforeBlockContext = function (context) {
+                return Rules.NodeIsBlockContext(context.nextTokenParent);
+            };
+            // IMPORTANT!!! This method must return true ONLY for nodes with open and close braces as immediate children
+            Rules.NodeIsBlockContext = function (node) {
+                if (Rules.NodeIsTypeScriptDeclWithBlockContext(node)) {
+                    // This means we are in a context that looks like a block to the user, but in the grammar is actually not a node (it's a class, module, enum, object type literal, etc).
+                    return true;
+                }
+                switch (node.kind) {
+                    case 199 /* Block */:
+                    case 227 /* CaseBlock */:
+                    case 171 /* ObjectLiteralExpression */:
+                    case 226 /* ModuleBlock */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsFunctionDeclContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 220 /* FunctionDeclaration */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    // case SyntaxKind.MemberFunctionDeclaration:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    // case SyntaxKind.MethodSignature:
+                    case 151 /* CallSignature */:
+                    case 179 /* FunctionExpression */:
+                    case 148 /* Constructor */:
+                    case 180 /* ArrowFunction */:
+                    // case SyntaxKind.ConstructorDeclaration:
+                    // case SyntaxKind.SimpleArrowFunctionExpression:
+                    // case SyntaxKind.ParenthesizedArrowFunctionExpression:
+                    case 222 /* InterfaceDeclaration */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsFunctionDeclarationOrFunctionExpressionContext = function (context) {
+                return context.contextNode.kind === 220 /* FunctionDeclaration */ || context.contextNode.kind === 179 /* FunctionExpression */;
+            };
+            Rules.IsTypeScriptDeclWithBlockContext = function (context) {
+                return Rules.NodeIsTypeScriptDeclWithBlockContext(context.contextNode);
+            };
+            Rules.NodeIsTypeScriptDeclWithBlockContext = function (node) {
+                switch (node.kind) {
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 159 /* TypeLiteral */:
+                    case 225 /* ModuleDeclaration */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsAfterCodeBlockContext = function (context) {
+                switch (context.currentTokenParent.kind) {
+                    case 221 /* ClassDeclaration */:
+                    case 225 /* ModuleDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 199 /* Block */:
+                    case 252 /* CatchClause */:
+                    case 226 /* ModuleBlock */:
+                    case 213 /* SwitchStatement */:
+                        return true;
+                }
+                return false;
+            };
+            Rules.IsControlDeclContext = function (context) {
+                switch (context.contextNode.kind) {
+                    case 203 /* IfStatement */:
+                    case 213 /* SwitchStatement */:
+                    case 206 /* ForStatement */:
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                    case 205 /* WhileStatement */:
+                    case 216 /* TryStatement */:
+                    case 204 /* DoStatement */:
+                    case 212 /* WithStatement */:
+                    // TODO
+                    // case SyntaxKind.ElseClause:
+                    case 252 /* CatchClause */:
+                        return true;
+                    default:
+                        return false;
+                }
+            };
+            Rules.IsObjectContext = function (context) {
+                return context.contextNode.kind === 171 /* ObjectLiteralExpression */;
+            };
+            Rules.IsFunctionCallContext = function (context) {
+                return context.contextNode.kind === 174 /* CallExpression */;
+            };
+            Rules.IsNewContext = function (context) {
+                return context.contextNode.kind === 175 /* NewExpression */;
+            };
+            Rules.IsFunctionCallOrNewContext = function (context) {
+                return Rules.IsFunctionCallContext(context) || Rules.IsNewContext(context);
+            };
+            Rules.IsPreviousTokenNotComma = function (context) {
+                return context.currentTokenSpan.kind !== 24 /* CommaToken */;
+            };
+            Rules.IsNextTokenNotCloseBracket = function (context) {
+                return context.nextTokenSpan.kind !== 20 /* CloseBracketToken */;
+            };
+            Rules.IsArrowFunctionContext = function (context) {
+                return context.contextNode.kind === 180 /* ArrowFunction */;
+            };
+            Rules.IsNonJsxSameLineTokenContext = function (context) {
+                return context.TokensAreOnSameLine() && context.contextNode.kind !== 244 /* JsxText */;
+            };
+            Rules.IsNotBeforeBlockInFunctionDeclarationContext = function (context) {
+                return !Rules.IsFunctionDeclContext(context) && !Rules.IsBeforeBlockContext(context);
+            };
+            Rules.IsEndOfDecoratorContextOnSameLine = function (context) {
+                return context.TokensAreOnSameLine() &&
+                    context.contextNode.decorators &&
+                    Rules.NodeIsInDecoratorContext(context.currentTokenParent) &&
+                    !Rules.NodeIsInDecoratorContext(context.nextTokenParent);
+            };
+            Rules.NodeIsInDecoratorContext = function (node) {
+                while (ts.isExpression(node)) {
+                    node = node.parent;
+                }
+                return node.kind === 143 /* Decorator */;
+            };
+            Rules.IsStartOfVariableDeclarationList = function (context) {
+                return context.currentTokenParent.kind === 219 /* VariableDeclarationList */ &&
+                    context.currentTokenParent.getStart(context.sourceFile) === context.currentTokenSpan.pos;
+            };
+            Rules.IsNotFormatOnEnter = function (context) {
+                return context.formattingRequestKind !== 2 /* FormatOnEnter */;
+            };
+            Rules.IsModuleDeclContext = function (context) {
+                return context.contextNode.kind === 225 /* ModuleDeclaration */;
+            };
+            Rules.IsObjectTypeContext = function (context) {
+                return context.contextNode.kind === 159 /* TypeLiteral */; // && context.contextNode.parent.kind !== SyntaxKind.InterfaceDeclaration;
+            };
+            Rules.IsTypeArgumentOrParameterOrAssertion = function (token, parent) {
+                if (token.kind !== 25 /* LessThanToken */ && token.kind !== 27 /* GreaterThanToken */) {
+                    return false;
+                }
+                switch (parent.kind) {
+                    case 155 /* TypeReference */:
+                    case 177 /* TypeAssertionExpression */:
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 220 /* FunctionDeclaration */:
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 151 /* CallSignature */:
+                    case 152 /* ConstructSignature */:
+                    case 174 /* CallExpression */:
+                    case 175 /* NewExpression */:
+                    case 194 /* ExpressionWithTypeArguments */:
+                        return true;
+                    default:
+                        return false;
+                }
+            };
+            Rules.IsTypeArgumentOrParameterOrAssertionContext = function (context) {
+                return Rules.IsTypeArgumentOrParameterOrAssertion(context.currentTokenSpan, context.currentTokenParent) ||
+                    Rules.IsTypeArgumentOrParameterOrAssertion(context.nextTokenSpan, context.nextTokenParent);
+            };
+            Rules.IsTypeAssertionContext = function (context) {
+                return context.contextNode.kind === 177 /* TypeAssertionExpression */;
+            };
+            Rules.IsVoidOpContext = function (context) {
+                return context.currentTokenSpan.kind === 103 /* VoidKeyword */ && context.currentTokenParent.kind === 183 /* VoidExpression */;
+            };
+            Rules.IsYieldOrYieldStarWithOperand = function (context) {
+                return context.contextNode.kind === 190 /* YieldExpression */ && context.contextNode.expression !== undefined;
+            };
+            return Rules;
+        }());
+        formatting.Rules = Rules;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RulesMap = (function () {
+            function RulesMap() {
+                this.map = [];
+                this.mapRowLength = 0;
+            }
+            RulesMap.create = function (rules) {
+                var result = new RulesMap();
+                result.Initialize(rules);
+                return result;
+            };
+            RulesMap.prototype.Initialize = function (rules) {
+                this.mapRowLength = 138 /* LastToken */ + 1;
+                this.map = new Array(this.mapRowLength * this.mapRowLength); // new Array<RulesBucket>(this.mapRowLength * this.mapRowLength);
+                // This array is used only during construction of the rulesbucket in the map
+                var rulesBucketConstructionStateList = new Array(this.map.length); // new Array<RulesBucketConstructionState>(this.map.length);
+                this.FillRules(rules, rulesBucketConstructionStateList);
+                return this.map;
+            };
+            RulesMap.prototype.FillRules = function (rules, rulesBucketConstructionStateList) {
+                var _this = this;
+                rules.forEach(function (rule) {
+                    _this.FillRule(rule, rulesBucketConstructionStateList);
+                });
+            };
+            RulesMap.prototype.GetRuleBucketIndex = function (row, column) {
+                var rulesBucketIndex = (row * this.mapRowLength) + column;
+                // Debug.Assert(rulesBucketIndex < this.map.Length, "Trying to access an index outside the array.");
+                return rulesBucketIndex;
+            };
+            RulesMap.prototype.FillRule = function (rule, rulesBucketConstructionStateList) {
+                var _this = this;
+                var specificRule = rule.Descriptor.LeftTokenRange !== formatting.Shared.TokenRange.Any &&
+                    rule.Descriptor.RightTokenRange !== formatting.Shared.TokenRange.Any;
+                rule.Descriptor.LeftTokenRange.GetTokens().forEach(function (left) {
+                    rule.Descriptor.RightTokenRange.GetTokens().forEach(function (right) {
+                        var rulesBucketIndex = _this.GetRuleBucketIndex(left, right);
+                        var rulesBucket = _this.map[rulesBucketIndex];
+                        if (rulesBucket === undefined) {
+                            rulesBucket = _this.map[rulesBucketIndex] = new RulesBucket();
+                        }
+                        rulesBucket.AddRule(rule, specificRule, rulesBucketConstructionStateList, rulesBucketIndex);
+                    });
+                });
+            };
+            RulesMap.prototype.GetRule = function (context) {
+                var bucketIndex = this.GetRuleBucketIndex(context.currentTokenSpan.kind, context.nextTokenSpan.kind);
+                var bucket = this.map[bucketIndex];
+                if (bucket) {
+                    for (var _i = 0, _a = bucket.Rules(); _i < _a.length; _i++) {
+                        var rule = _a[_i];
+                        if (rule.Operation.Context.InContext(context)) {
+                            return rule;
+                        }
+                    }
+                }
+                return undefined;
+            };
+            return RulesMap;
+        }());
+        formatting.RulesMap = RulesMap;
+        var MaskBitSize = 5;
+        var Mask = 0x1f;
+        (function (RulesPosition) {
+            RulesPosition[RulesPosition["IgnoreRulesSpecific"] = 0] = "IgnoreRulesSpecific";
+            RulesPosition[RulesPosition["IgnoreRulesAny"] = MaskBitSize * 1] = "IgnoreRulesAny";
+            RulesPosition[RulesPosition["ContextRulesSpecific"] = MaskBitSize * 2] = "ContextRulesSpecific";
+            RulesPosition[RulesPosition["ContextRulesAny"] = MaskBitSize * 3] = "ContextRulesAny";
+            RulesPosition[RulesPosition["NoContextRulesSpecific"] = MaskBitSize * 4] = "NoContextRulesSpecific";
+            RulesPosition[RulesPosition["NoContextRulesAny"] = MaskBitSize * 5] = "NoContextRulesAny";
+        })(formatting.RulesPosition || (formatting.RulesPosition = {}));
+        var RulesPosition = formatting.RulesPosition;
+        var RulesBucketConstructionState = (function () {
+            function RulesBucketConstructionState() {
+                //// The Rules list contains all the inserted rules into a rulebucket in the following order:
+                ////    1- Ignore rules with specific token combination
+                ////    2- Ignore rules with any token combination
+                ////    3- Context rules with specific token combination
+                ////    4- Context rules with any token combination
+                ////    5- Non-context rules with specific token combination
+                ////    6- Non-context rules with any token combination
+                ////
+                //// The member rulesInsertionIndexBitmap is used to describe the number of rules
+                //// in each sub-bucket (above) hence can be used to know the index of where to insert
+                //// the next rule. It's a bitmap which contains 6 different sections each is given 5 bits.
+                ////
+                //// Example:
+                //// In order to insert a rule to the end of sub-bucket (3), we get the index by adding
+                //// the values in the bitmap segments 3rd, 2nd, and 1st.
+                this.rulesInsertionIndexBitmap = 0;
+            }
+            RulesBucketConstructionState.prototype.GetInsertionIndex = function (maskPosition) {
+                var index = 0;
+                var pos = 0;
+                var indexBitmap = this.rulesInsertionIndexBitmap;
+                while (pos <= maskPosition) {
+                    index += (indexBitmap & Mask);
+                    indexBitmap >>= MaskBitSize;
+                    pos += MaskBitSize;
+                }
+                return index;
+            };
+            RulesBucketConstructionState.prototype.IncreaseInsertionIndex = function (maskPosition) {
+                var value = (this.rulesInsertionIndexBitmap >> maskPosition) & Mask;
+                value++;
+                ts.Debug.assert((value & Mask) === value, "Adding more rules into the sub-bucket than allowed. Maximum allowed is 32 rules.");
+                var temp = this.rulesInsertionIndexBitmap & ~(Mask << maskPosition);
+                temp |= value << maskPosition;
+                this.rulesInsertionIndexBitmap = temp;
+            };
+            return RulesBucketConstructionState;
+        }());
+        formatting.RulesBucketConstructionState = RulesBucketConstructionState;
+        var RulesBucket = (function () {
+            function RulesBucket() {
+                this.rules = [];
+            }
+            RulesBucket.prototype.Rules = function () {
+                return this.rules;
+            };
+            RulesBucket.prototype.AddRule = function (rule, specificTokens, constructionState, rulesBucketIndex) {
+                var position;
+                if (rule.Operation.Action === 1 /* Ignore */) {
+                    position = specificTokens ?
+                        RulesPosition.IgnoreRulesSpecific :
+                        RulesPosition.IgnoreRulesAny;
+                }
+                else if (!rule.Operation.Context.IsAny()) {
+                    position = specificTokens ?
+                        RulesPosition.ContextRulesSpecific :
+                        RulesPosition.ContextRulesAny;
+                }
+                else {
+                    position = specificTokens ?
+                        RulesPosition.NoContextRulesSpecific :
+                        RulesPosition.NoContextRulesAny;
+                }
+                var state = constructionState[rulesBucketIndex];
+                if (state === undefined) {
+                    state = constructionState[rulesBucketIndex] = new RulesBucketConstructionState();
+                }
+                var index = state.GetInsertionIndex(position);
+                this.rules.splice(index, 0, rule);
+                state.IncreaseInsertionIndex(position);
+            };
+            return RulesBucket;
+        }());
+        formatting.RulesBucket = RulesBucket;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Shared;
+        (function (Shared) {
+            var TokenRangeAccess = (function () {
+                function TokenRangeAccess(from, to, except) {
+                    this.tokens = [];
+                    for (var token = from; token <= to; token++) {
+                        if (ts.indexOf(except, token) < 0) {
+                            this.tokens.push(token);
+                        }
+                    }
+                }
+                TokenRangeAccess.prototype.GetTokens = function () {
+                    return this.tokens;
+                };
+                TokenRangeAccess.prototype.Contains = function (token) {
+                    return this.tokens.indexOf(token) >= 0;
+                };
+                return TokenRangeAccess;
+            }());
+            Shared.TokenRangeAccess = TokenRangeAccess;
+            var TokenValuesAccess = (function () {
+                function TokenValuesAccess(tks) {
+                    this.tokens = tks && tks.length ? tks : [];
+                }
+                TokenValuesAccess.prototype.GetTokens = function () {
+                    return this.tokens;
+                };
+                TokenValuesAccess.prototype.Contains = function (token) {
+                    return this.tokens.indexOf(token) >= 0;
+                };
+                return TokenValuesAccess;
+            }());
+            Shared.TokenValuesAccess = TokenValuesAccess;
+            var TokenSingleValueAccess = (function () {
+                function TokenSingleValueAccess(token) {
+                    this.token = token;
+                }
+                TokenSingleValueAccess.prototype.GetTokens = function () {
+                    return [this.token];
+                };
+                TokenSingleValueAccess.prototype.Contains = function (tokenValue) {
+                    return tokenValue === this.token;
+                };
+                return TokenSingleValueAccess;
+            }());
+            Shared.TokenSingleValueAccess = TokenSingleValueAccess;
+            var TokenAllAccess = (function () {
+                function TokenAllAccess() {
+                }
+                TokenAllAccess.prototype.GetTokens = function () {
+                    var result = [];
+                    for (var token = 0 /* FirstToken */; token <= 138 /* LastToken */; token++) {
+                        result.push(token);
+                    }
+                    return result;
+                };
+                TokenAllAccess.prototype.Contains = function (tokenValue) {
+                    return true;
+                };
+                TokenAllAccess.prototype.toString = function () {
+                    return "[allTokens]";
+                };
+                return TokenAllAccess;
+            }());
+            Shared.TokenAllAccess = TokenAllAccess;
+            var TokenRange = (function () {
+                function TokenRange(tokenAccess) {
+                    this.tokenAccess = tokenAccess;
+                }
+                TokenRange.FromToken = function (token) {
+                    return new TokenRange(new TokenSingleValueAccess(token));
+                };
+                TokenRange.FromTokens = function (tokens) {
+                    return new TokenRange(new TokenValuesAccess(tokens));
+                };
+                TokenRange.FromRange = function (f, to, except) {
+                    if (except === void 0) { except = []; }
+                    return new TokenRange(new TokenRangeAccess(f, to, except));
+                };
+                TokenRange.AllTokens = function () {
+                    return new TokenRange(new TokenAllAccess());
+                };
+                TokenRange.prototype.GetTokens = function () {
+                    return this.tokenAccess.GetTokens();
+                };
+                TokenRange.prototype.Contains = function (token) {
+                    return this.tokenAccess.Contains(token);
+                };
+                TokenRange.prototype.toString = function () {
+                    return this.tokenAccess.toString();
+                };
+                TokenRange.Any = TokenRange.AllTokens();
+                TokenRange.AnyIncludingMultilineComments = TokenRange.FromTokens(TokenRange.Any.GetTokens().concat([3 /* MultiLineCommentTrivia */]));
+                TokenRange.Keywords = TokenRange.FromRange(70 /* FirstKeyword */, 138 /* LastKeyword */);
+                TokenRange.BinaryOperators = TokenRange.FromRange(25 /* FirstBinaryOperator */, 68 /* LastBinaryOperator */);
+                TokenRange.BinaryKeywordOperators = TokenRange.FromTokens([90 /* InKeyword */, 91 /* InstanceOfKeyword */, 138 /* OfKeyword */, 116 /* AsKeyword */, 124 /* IsKeyword */]);
+                TokenRange.UnaryPrefixOperators = TokenRange.FromTokens([41 /* PlusPlusToken */, 42 /* MinusMinusToken */, 50 /* TildeToken */, 49 /* ExclamationToken */]);
+                TokenRange.UnaryPrefixExpressions = TokenRange.FromTokens([8 /* NumericLiteral */, 69 /* Identifier */, 17 /* OpenParenToken */, 19 /* OpenBracketToken */, 15 /* OpenBraceToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
+                TokenRange.UnaryPreincrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
+                TokenRange.UnaryPostincrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 18 /* CloseParenToken */, 20 /* CloseBracketToken */, 92 /* NewKeyword */]);
+                TokenRange.UnaryPredecrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 17 /* OpenParenToken */, 97 /* ThisKeyword */, 92 /* NewKeyword */]);
+                TokenRange.UnaryPostdecrementExpressions = TokenRange.FromTokens([69 /* Identifier */, 18 /* CloseParenToken */, 20 /* CloseBracketToken */, 92 /* NewKeyword */]);
+                TokenRange.Comments = TokenRange.FromTokens([2 /* SingleLineCommentTrivia */, 3 /* MultiLineCommentTrivia */]);
+                TokenRange.TypeNames = TokenRange.FromTokens([69 /* Identifier */, 130 /* NumberKeyword */, 132 /* StringKeyword */, 120 /* BooleanKeyword */, 133 /* SymbolKeyword */, 103 /* VoidKeyword */, 117 /* AnyKeyword */]);
+                return TokenRange;
+            }());
+            Shared.TokenRange = TokenRange;
+        })(Shared = formatting.Shared || (formatting.Shared = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='..\services.ts' />
+///<reference path='formattingContext.ts' />
+///<reference path='formattingRequestKind.ts' />
+///<reference path='rule.ts' />
+///<reference path='ruleAction.ts' />
+///<reference path='ruleDescriptor.ts' />
+///<reference path='ruleFlag.ts' />
+///<reference path='ruleOperation.ts' />
+///<reference path='ruleOperationContext.ts' />
+///<reference path='rules.ts' />
+///<reference path='rulesMap.ts' />
+///<reference path='tokenRange.ts' /> 
+/// <reference path="references.ts"/>
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var RulesProvider = (function () {
+            function RulesProvider() {
+                this.globalRules = new formatting.Rules();
+            }
+            RulesProvider.prototype.getRuleName = function (rule) {
+                return this.globalRules.getRuleName(rule);
+            };
+            RulesProvider.prototype.getRuleByName = function (name) {
+                return this.globalRules[name];
+            };
+            RulesProvider.prototype.getRulesMap = function () {
+                return this.rulesMap;
+            };
+            RulesProvider.prototype.ensureUpToDate = function (options) {
+                if (!this.options || !ts.compareDataObjects(this.options, options)) {
+                    var activeRules = this.createActiveRules(options);
+                    var rulesMap = formatting.RulesMap.create(activeRules);
+                    this.activeRules = activeRules;
+                    this.rulesMap = rulesMap;
+                    this.options = ts.clone(options);
+                }
+            };
+            RulesProvider.prototype.createActiveRules = function (options) {
+                var rules = this.globalRules.HighPriorityCommonRules.slice(0);
+                if (options.InsertSpaceAfterCommaDelimiter) {
+                    rules.push(this.globalRules.SpaceAfterComma);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterComma);
+                }
+                if (options.InsertSpaceAfterFunctionKeywordForAnonymousFunctions) {
+                    rules.push(this.globalRules.SpaceAfterAnonymousFunctionKeyword);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterAnonymousFunctionKeyword);
+                }
+                if (options.InsertSpaceAfterKeywordsInControlFlowStatements) {
+                    rules.push(this.globalRules.SpaceAfterKeywordInControl);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterKeywordInControl);
+                }
+                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyParenthesis) {
+                    rules.push(this.globalRules.SpaceAfterOpenParen);
+                    rules.push(this.globalRules.SpaceBeforeCloseParen);
+                    rules.push(this.globalRules.NoSpaceBetweenParens);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterOpenParen);
+                    rules.push(this.globalRules.NoSpaceBeforeCloseParen);
+                    rules.push(this.globalRules.NoSpaceBetweenParens);
+                }
+                if (options.InsertSpaceAfterOpeningAndBeforeClosingNonemptyBrackets) {
+                    rules.push(this.globalRules.SpaceAfterOpenBracket);
+                    rules.push(this.globalRules.SpaceBeforeCloseBracket);
+                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterOpenBracket);
+                    rules.push(this.globalRules.NoSpaceBeforeCloseBracket);
+                    rules.push(this.globalRules.NoSpaceBetweenBrackets);
+                }
+                if (options.InsertSpaceAfterOpeningAndBeforeClosingTemplateStringBraces) {
+                    rules.push(this.globalRules.SpaceAfterTemplateHeadAndMiddle);
+                    rules.push(this.globalRules.SpaceBeforeTemplateMiddleAndTail);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterTemplateHeadAndMiddle);
+                    rules.push(this.globalRules.NoSpaceBeforeTemplateMiddleAndTail);
+                }
+                if (options.InsertSpaceAfterSemicolonInForStatements) {
+                    rules.push(this.globalRules.SpaceAfterSemicolonInFor);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceAfterSemicolonInFor);
+                }
+                if (options.InsertSpaceBeforeAndAfterBinaryOperators) {
+                    rules.push(this.globalRules.SpaceBeforeBinaryOperator);
+                    rules.push(this.globalRules.SpaceAfterBinaryOperator);
+                }
+                else {
+                    rules.push(this.globalRules.NoSpaceBeforeBinaryOperator);
+                    rules.push(this.globalRules.NoSpaceAfterBinaryOperator);
+                }
+                if (options.PlaceOpenBraceOnNewLineForControlBlocks) {
+                    rules.push(this.globalRules.NewLineBeforeOpenBraceInControl);
+                }
+                if (options.PlaceOpenBraceOnNewLineForFunctions) {
+                    rules.push(this.globalRules.NewLineBeforeOpenBraceInFunction);
+                    rules.push(this.globalRules.NewLineBeforeOpenBraceInTypeScriptDeclWithBlock);
+                }
+                rules = rules.concat(this.globalRules.LowPriorityCommonRules);
+                return rules;
+            };
+            return RulesProvider;
+        }());
+        formatting.RulesProvider = RulesProvider;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='..\services.ts' />
+///<reference path='formattingScanner.ts' />
+///<reference path='rulesProvider.ts' />
+///<reference path='references.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var Constants;
+        (function (Constants) {
+            Constants[Constants["Unknown"] = -1] = "Unknown";
+        })(Constants || (Constants = {}));
+        function formatOnEnter(position, sourceFile, rulesProvider, options) {
+            var line = sourceFile.getLineAndCharacterOfPosition(position).line;
+            if (line === 0) {
+                return [];
+            }
+            // After the enter key, the cursor is now at a new line. The new line may or may not contain non-whitespace characters.
+            // If the new line has only whitespaces, we won't want to format this line, because that would remove the indentation as
+            // trailing whitespaces. So the end of the formatting span should be the later one between:
+            //  1. the end of the previous line
+            //  2. the last non-whitespace character in the current line
+            var endOfFormatSpan = ts.getEndLinePosition(line, sourceFile);
+            while (ts.isWhiteSpace(sourceFile.text.charCodeAt(endOfFormatSpan)) && !ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+                endOfFormatSpan--;
+            }
+            // if the character at the end of the span is a line break, we shouldn't include it, because it indicates we don't want to
+            // touch the current line at all. Also, on some OSes the line break consists of two characters (\r\n), we should test if the
+            // previous character before the end of format span is line break character as well.
+            if (ts.isLineBreak(sourceFile.text.charCodeAt(endOfFormatSpan))) {
+                endOfFormatSpan--;
+            }
+            var span = {
+                // get start position for the previous line
+                pos: ts.getStartPositionOfLine(line - 1, sourceFile),
+                // end value is exclusive so add 1 to the result
+                end: endOfFormatSpan + 1
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 2 /* FormatOnEnter */);
+        }
+        formatting.formatOnEnter = formatOnEnter;
+        function formatOnSemicolon(position, sourceFile, rulesProvider, options) {
+            return formatOutermostParent(position, 23 /* SemicolonToken */, sourceFile, options, rulesProvider, 3 /* FormatOnSemicolon */);
+        }
+        formatting.formatOnSemicolon = formatOnSemicolon;
+        function formatOnClosingCurly(position, sourceFile, rulesProvider, options) {
+            return formatOutermostParent(position, 16 /* CloseBraceToken */, sourceFile, options, rulesProvider, 4 /* FormatOnClosingCurlyBrace */);
+        }
+        formatting.formatOnClosingCurly = formatOnClosingCurly;
+        function formatDocument(sourceFile, rulesProvider, options) {
+            var span = {
+                pos: 0,
+                end: sourceFile.text.length
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 0 /* FormatDocument */);
+        }
+        formatting.formatDocument = formatDocument;
+        function formatSelection(start, end, sourceFile, rulesProvider, options) {
+            // format from the beginning of the line
+            var span = {
+                pos: ts.getLineStartPositionForPosition(start, sourceFile),
+                end: end
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, 1 /* FormatSelection */);
+        }
+        formatting.formatSelection = formatSelection;
+        function formatOutermostParent(position, expectedLastToken, sourceFile, options, rulesProvider, requestKind) {
+            var parent = findOutermostParent(position, expectedLastToken, sourceFile);
+            if (!parent) {
+                return [];
+            }
+            var span = {
+                pos: ts.getLineStartPositionForPosition(parent.getStart(sourceFile), sourceFile),
+                end: parent.end
+            };
+            return formatSpan(span, sourceFile, options, rulesProvider, requestKind);
+        }
+        function findOutermostParent(position, expectedTokenKind, sourceFile) {
+            var precedingToken = ts.findPrecedingToken(position, sourceFile);
+            // when it is claimed that trigger character was typed at given position
+            // we verify that there is a token with a matching kind whose end is equal to position (because the character was just typed).
+            // If this condition is not hold - then trigger character was typed in some other context,
+            // i.e.in comment and thus should not trigger autoformatting
+            if (!precedingToken ||
+                precedingToken.kind !== expectedTokenKind ||
+                position !== precedingToken.getEnd()) {
+                return undefined;
+            }
+            // walk up and search for the parent node that ends at the same position with precedingToken.
+            // for cases like this
+            //
+            // let x = 1;
+            // while (true) {
+            // }
+            // after typing close curly in while statement we want to reformat just the while statement.
+            // However if we just walk upwards searching for the parent that has the same end value -
+            // we'll end up with the whole source file. isListElement allows to stop on the list element level
+            var current = precedingToken;
+            while (current &&
+                current.parent &&
+                current.parent.end === precedingToken.end &&
+                !isListElement(current.parent, current)) {
+                current = current.parent;
+            }
+            return current;
+        }
+        // Returns true if node is a element in some list in parent
+        // i.e. parent is class declaration with the list of members and node is one of members.
+        function isListElement(parent, node) {
+            switch (parent.kind) {
+                case 221 /* ClassDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                    return ts.rangeContainsRange(parent.members, node);
+                case 225 /* ModuleDeclaration */:
+                    var body = parent.body;
+                    return body && body.kind === 199 /* Block */ && ts.rangeContainsRange(body.statements, node);
+                case 256 /* SourceFile */:
+                case 199 /* Block */:
+                case 226 /* ModuleBlock */:
+                    return ts.rangeContainsRange(parent.statements, node);
+                case 252 /* CatchClause */:
+                    return ts.rangeContainsRange(parent.block.statements, node);
+            }
+            return false;
+        }
+        /** find node that fully contains given text range */
+        function findEnclosingNode(range, sourceFile) {
+            return find(sourceFile);
+            function find(n) {
+                var candidate = ts.forEachChild(n, function (c) { return ts.startEndContainsRange(c.getStart(sourceFile), c.end, range) && c; });
+                if (candidate) {
+                    var result = find(candidate);
+                    if (result) {
+                        return result;
+                    }
+                }
+                return n;
+            }
+        }
+        /** formatting is not applied to ranges that contain parse errors.
+          * This function will return a predicate that for a given text range will tell
+          * if there are any parse errors that overlap with the range.
+          */
+        function prepareRangeContainsErrorFunction(errors, originalRange) {
+            if (!errors.length) {
+                return rangeHasNoErrors;
+            }
+            // pick only errors that fall in range
+            var sorted = errors
+                .filter(function (d) { return ts.rangeOverlapsWithStartEnd(originalRange, d.start, d.start + d.length); })
+                .sort(function (e1, e2) { return e1.start - e2.start; });
+            if (!sorted.length) {
+                return rangeHasNoErrors;
+            }
+            var index = 0;
+            return function (r) {
+                // in current implementation sequence of arguments [r1, r2...] is monotonically increasing.
+                // 'index' tracks the index of the most recent error that was checked.
+                while (true) {
+                    if (index >= sorted.length) {
+                        // all errors in the range were already checked -> no error in specified range
+                        return false;
+                    }
+                    var error = sorted[index];
+                    if (r.end <= error.start) {
+                        // specified range ends before the error refered by 'index' - no error in range
+                        return false;
+                    }
+                    if (ts.startEndOverlapsWithStartEnd(r.pos, r.end, error.start, error.start + error.length)) {
+                        // specified range overlaps with error range
+                        return true;
+                    }
+                    index++;
+                }
+            };
+            function rangeHasNoErrors(r) {
+                return false;
+            }
+        }
+        /**
+          * Start of the original range might fall inside the comment - scanner will not yield appropriate results
+          * This function will look for token that is located before the start of target range
+          * and return its end as start position for the scanner.
+          */
+        function getScanStartPosition(enclosingNode, originalRange, sourceFile) {
+            var start = enclosingNode.getStart(sourceFile);
+            if (start === originalRange.pos && enclosingNode.end === originalRange.end) {
+                return start;
+            }
+            var precedingToken = ts.findPrecedingToken(originalRange.pos, sourceFile);
+            if (!precedingToken) {
+                // no preceding token found - start from the beginning of enclosing node
+                return enclosingNode.pos;
+            }
+            // preceding token ends after the start of original range (i.e when originalRange.pos falls in the middle of literal)
+            // start from the beginning of enclosingNode to handle the entire 'originalRange'
+            if (precedingToken.end >= originalRange.pos) {
+                return enclosingNode.pos;
+            }
+            return precedingToken.end;
+        }
+        /*
+         * For cases like
+         * if (a ||
+         *     b ||$
+         *     c) {...}
+         * If we hit Enter at $ we want line '    b ||' to be indented.
+         * Formatting will be applied to the last two lines.
+         * Node that fully encloses these lines is binary expression 'a ||...'.
+         * Initial indentation for this node will be 0.
+         * Binary expressions don't introduce new indentation scopes, however it is possible
+         * that some parent node on the same line does - like if statement in this case.
+         * Note that we are considering parents only from the same line with initial node -
+         * if parent is on the different line - its delta was already contributed
+         * to the initial indentation.
+         */
+        function getOwnOrInheritedDelta(n, options, sourceFile) {
+            var previousLine = -1 /* Unknown */;
+            var child;
+            while (n) {
+                var line = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile)).line;
+                if (previousLine !== -1 /* Unknown */ && line !== previousLine) {
+                    break;
+                }
+                if (formatting.SmartIndenter.shouldIndentChildNode(n, child)) {
+                    return options.IndentSize;
+                }
+                previousLine = line;
+                child = n;
+                n = n.parent;
+            }
+            return 0;
+        }
+        function formatSpan(originalRange, sourceFile, options, rulesProvider, requestKind) {
+            var rangeContainsError = prepareRangeContainsErrorFunction(sourceFile.parseDiagnostics, originalRange);
+            // formatting context is used by rules provider
+            var formattingContext = new formatting.FormattingContext(sourceFile, requestKind);
+            // find the smallest node that fully wraps the range and compute the initial indentation for the node
+            var enclosingNode = findEnclosingNode(originalRange, sourceFile);
+            var formattingScanner = formatting.getFormattingScanner(sourceFile, getScanStartPosition(enclosingNode, originalRange, sourceFile), originalRange.end);
+            var initialIndentation = formatting.SmartIndenter.getIndentationForNode(enclosingNode, originalRange, sourceFile, options);
+            var previousRangeHasError;
+            var previousRange;
+            var previousParent;
+            var previousRangeStartLine;
+            var lastIndentedLine;
+            var indentationOnLastIndentedLine;
+            var edits = [];
+            formattingScanner.advance();
+            if (formattingScanner.isOnToken()) {
+                var startLine = sourceFile.getLineAndCharacterOfPosition(enclosingNode.getStart(sourceFile)).line;
+                var undecoratedStartLine = startLine;
+                if (enclosingNode.decorators) {
+                    undecoratedStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(enclosingNode, sourceFile)).line;
+                }
+                var delta = getOwnOrInheritedDelta(enclosingNode, options, sourceFile);
+                processNode(enclosingNode, enclosingNode, startLine, undecoratedStartLine, initialIndentation, delta);
+            }
+            if (!formattingScanner.isOnToken()) {
+                var leadingTrivia = formattingScanner.getCurrentLeadingTrivia();
+                if (leadingTrivia) {
+                    processTrivia(leadingTrivia, enclosingNode, enclosingNode, undefined);
+                    trimTrailingWhitespacesForRemainingRange();
+                }
+            }
+            formattingScanner.close();
+            return edits;
+            // local functions
+            /** Tries to compute the indentation for a list element.
+              * If list element is not in range then
+              * function will pick its actual indentation
+              * so it can be pushed downstream as inherited indentation.
+              * If list element is in the range - its indentation will be equal
+              * to inherited indentation from its predecessors.
+              */
+            function tryComputeIndentationForListItem(startPos, endPos, parentStartLine, range, inheritedIndentation) {
+                if (ts.rangeOverlapsWithStartEnd(range, startPos, endPos) ||
+                    ts.rangeContainsStartEnd(range, startPos, endPos) /* Not to miss zero-range nodes e.g. JsxText */) {
+                    if (inheritedIndentation !== -1 /* Unknown */) {
+                        return inheritedIndentation;
+                    }
+                }
+                else {
+                    var startLine = sourceFile.getLineAndCharacterOfPosition(startPos).line;
+                    var startLinePosition = ts.getLineStartPositionForPosition(startPos, sourceFile);
+                    var column = formatting.SmartIndenter.findFirstNonWhitespaceColumn(startLinePosition, startPos, sourceFile, options);
+                    if (startLine !== parentStartLine || startPos === column) {
+                        return column;
+                    }
+                }
+                return -1 /* Unknown */;
+            }
+            function computeIndentation(node, startLine, inheritedIndentation, parent, parentDynamicIndentation, effectiveParentStartLine) {
+                var indentation = inheritedIndentation;
+                var delta = formatting.SmartIndenter.shouldIndentChildNode(node) ? options.IndentSize : 0;
+                if (effectiveParentStartLine === startLine) {
+                    // if node is located on the same line with the parent
+                    // - inherit indentation from the parent
+                    // - push children if either parent of node itself has non-zero delta
+                    indentation = startLine === lastIndentedLine
+                        ? indentationOnLastIndentedLine
+                        : parentDynamicIndentation.getIndentation();
+                    delta = Math.min(options.IndentSize, parentDynamicIndentation.getDelta(node) + delta);
+                }
+                else if (indentation === -1 /* Unknown */) {
+                    if (formatting.SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement(parent, node, startLine, sourceFile)) {
+                        indentation = parentDynamicIndentation.getIndentation();
+                    }
+                    else {
+                        indentation = parentDynamicIndentation.getIndentation() + parentDynamicIndentation.getDelta(node);
+                    }
+                }
+                return {
+                    indentation: indentation,
+                    delta: delta
+                };
+            }
+            function getFirstNonDecoratorTokenOfNode(node) {
+                if (node.modifiers && node.modifiers.length) {
+                    return node.modifiers[0].kind;
+                }
+                switch (node.kind) {
+                    case 221 /* ClassDeclaration */: return 73 /* ClassKeyword */;
+                    case 222 /* InterfaceDeclaration */: return 107 /* InterfaceKeyword */;
+                    case 220 /* FunctionDeclaration */: return 87 /* FunctionKeyword */;
+                    case 224 /* EnumDeclaration */: return 224 /* EnumDeclaration */;
+                    case 149 /* GetAccessor */: return 123 /* GetKeyword */;
+                    case 150 /* SetAccessor */: return 131 /* SetKeyword */;
+                    case 147 /* MethodDeclaration */:
+                        if (node.asteriskToken) {
+                            return 37 /* AsteriskToken */;
+                        }
+                    // fall-through
+                    case 145 /* PropertyDeclaration */:
+                    case 142 /* Parameter */:
+                        return node.name.kind;
+                }
+            }
+            function getDynamicIndentation(node, nodeStartLine, indentation, delta) {
+                return {
+                    getIndentationForComment: function (kind, tokenIndentation, container) {
+                        switch (kind) {
+                            // preceding comment to the token that closes the indentation scope inherits the indentation from the scope
+                            // ..  {
+                            //     // comment
+                            // }
+                            case 16 /* CloseBraceToken */:
+                            case 20 /* CloseBracketToken */:
+                            case 18 /* CloseParenToken */:
+                                return indentation + getEffectiveDelta(delta, container);
+                        }
+                        return tokenIndentation !== -1 /* Unknown */ ? tokenIndentation : indentation;
+                    },
+                    getIndentationForToken: function (line, kind, container) {
+                        if (nodeStartLine !== line && node.decorators) {
+                            if (kind === getFirstNonDecoratorTokenOfNode(node)) {
+                                // if this token is the first token following the list of decorators, we do not need to indent
+                                return indentation;
+                            }
+                        }
+                        switch (kind) {
+                            // open and close brace, 'else' and 'while' (in do statement) tokens has indentation of the parent
+                            case 15 /* OpenBraceToken */:
+                            case 16 /* CloseBraceToken */:
+                            case 19 /* OpenBracketToken */:
+                            case 20 /* CloseBracketToken */:
+                            case 17 /* OpenParenToken */:
+                            case 18 /* CloseParenToken */:
+                            case 80 /* ElseKeyword */:
+                            case 104 /* WhileKeyword */:
+                            case 55 /* AtToken */:
+                                return indentation;
+                            default:
+                                // if token line equals to the line of containing node (this is a first token in the node) - use node indentation
+                                return nodeStartLine !== line ? indentation + getEffectiveDelta(delta, container) : indentation;
+                        }
+                    },
+                    getIndentation: function () { return indentation; },
+                    getDelta: function (child) { return getEffectiveDelta(delta, child); },
+                    recomputeIndentation: function (lineAdded) {
+                        if (node.parent && formatting.SmartIndenter.shouldIndentChildNode(node.parent, node)) {
+                            if (lineAdded) {
+                                indentation += options.IndentSize;
+                            }
+                            else {
+                                indentation -= options.IndentSize;
+                            }
+                            if (formatting.SmartIndenter.shouldIndentChildNode(node)) {
+                                delta = options.IndentSize;
+                            }
+                            else {
+                                delta = 0;
+                            }
+                        }
+                    }
+                };
+                function getEffectiveDelta(delta, child) {
+                    // Delta value should be zero when the node explicitly prevents indentation of the child node
+                    return formatting.SmartIndenter.nodeWillIndentChild(node, child, true) ? delta : 0;
+                }
+            }
+            function processNode(node, contextNode, nodeStartLine, undecoratedNodeStartLine, indentation, delta) {
+                if (!ts.rangeOverlapsWithStartEnd(originalRange, node.getStart(sourceFile), node.getEnd())) {
+                    return;
+                }
+                var nodeDynamicIndentation = getDynamicIndentation(node, nodeStartLine, indentation, delta);
+                // a useful observations when tracking context node
+                //        /
+                //      [a]
+                //   /   |   \
+                //  [b] [c] [d]
+                // node 'a' is a context node for nodes 'b', 'c', 'd'
+                // except for the leftmost leaf token in [b] - in this case context node ('e') is located somewhere above 'a'
+                // this rule can be applied recursively to child nodes of 'a'.
+                //
+                // context node is set to parent node value after processing every child node
+                // context node is set to parent of the token after processing every token
+                var childContextNode = contextNode;
+                // if there are any tokens that logically belong to node and interleave child nodes
+                // such tokens will be consumed in processChildNode for for the child that follows them
+                ts.forEachChild(node, function (child) {
+                    processChildNode(child, /*inheritedIndentation*/ -1 /* Unknown */, node, nodeDynamicIndentation, nodeStartLine, undecoratedNodeStartLine, /*isListItem*/ false);
+                }, function (nodes) {
+                    processChildNodes(nodes, node, nodeStartLine, nodeDynamicIndentation);
+                });
+                // proceed any tokens in the node that are located after child nodes
+                while (formattingScanner.isOnToken()) {
+                    var tokenInfo = formattingScanner.readTokenInfo(node);
+                    if (tokenInfo.token.end > node.end) {
+                        break;
+                    }
+                    consumeTokenAndAdvanceScanner(tokenInfo, node, nodeDynamicIndentation);
+                }
+                function processChildNode(child, inheritedIndentation, parent, parentDynamicIndentation, parentStartLine, undecoratedParentStartLine, isListItem, isFirstListItem) {
+                    var childStartPos = child.getStart(sourceFile);
+                    var childStartLine = sourceFile.getLineAndCharacterOfPosition(childStartPos).line;
+                    var undecoratedChildStartLine = childStartLine;
+                    if (child.decorators) {
+                        undecoratedChildStartLine = sourceFile.getLineAndCharacterOfPosition(ts.getNonDecoratorTokenPosOfNode(child, sourceFile)).line;
+                    }
+                    // if child is a list item - try to get its indentation
+                    var childIndentationAmount = -1 /* Unknown */;
+                    if (isListItem) {
+                        childIndentationAmount = tryComputeIndentationForListItem(childStartPos, child.end, parentStartLine, originalRange, inheritedIndentation);
+                        if (childIndentationAmount !== -1 /* Unknown */) {
+                            inheritedIndentation = childIndentationAmount;
+                        }
+                    }
+                    // child node is outside the target range - do not dive inside
+                    if (!ts.rangeOverlapsWithStartEnd(originalRange, child.pos, child.end)) {
+                        return inheritedIndentation;
+                    }
+                    if (child.getFullWidth() === 0) {
+                        return inheritedIndentation;
+                    }
+                    while (formattingScanner.isOnToken()) {
+                        // proceed any parent tokens that are located prior to child.getStart()
+                        var tokenInfo = formattingScanner.readTokenInfo(node);
+                        if (tokenInfo.token.end > childStartPos) {
+                            // stop when formatting scanner advances past the beginning of the child
+                            break;
+                        }
+                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation);
+                    }
+                    if (!formattingScanner.isOnToken()) {
+                        return inheritedIndentation;
+                    }
+                    if (ts.isToken(child)) {
+                        // if child node is a token, it does not impact indentation, proceed it using parent indentation scope rules
+                        var tokenInfo = formattingScanner.readTokenInfo(child);
+                        ts.Debug.assert(tokenInfo.token.end === child.end);
+                        consumeTokenAndAdvanceScanner(tokenInfo, node, parentDynamicIndentation, child);
+                        return inheritedIndentation;
+                    }
+                    var effectiveParentStartLine = child.kind === 143 /* Decorator */ ? childStartLine : undecoratedParentStartLine;
+                    var childIndentation = computeIndentation(child, childStartLine, childIndentationAmount, node, parentDynamicIndentation, effectiveParentStartLine);
+                    processNode(child, childContextNode, childStartLine, undecoratedChildStartLine, childIndentation.indentation, childIndentation.delta);
+                    childContextNode = node;
+                    if (isFirstListItem && parent.kind === 170 /* ArrayLiteralExpression */ && inheritedIndentation === -1 /* Unknown */) {
+                        inheritedIndentation = childIndentation.indentation;
+                    }
+                    return inheritedIndentation;
+                }
+                function processChildNodes(nodes, parent, parentStartLine, parentDynamicIndentation) {
+                    var listStartToken = getOpenTokenForList(parent, nodes);
+                    var listEndToken = getCloseTokenForOpenToken(listStartToken);
+                    var listDynamicIndentation = parentDynamicIndentation;
+                    var startLine = parentStartLine;
+                    if (listStartToken !== 0 /* Unknown */) {
+                        // introduce a new indentation scope for lists (including list start and end tokens)
+                        while (formattingScanner.isOnToken()) {
+                            var tokenInfo = formattingScanner.readTokenInfo(parent);
+                            if (tokenInfo.token.end > nodes.pos) {
+                                // stop when formatting scanner moves past the beginning of node list
+                                break;
+                            }
+                            else if (tokenInfo.token.kind === listStartToken) {
+                                // consume list start token
+                                startLine = sourceFile.getLineAndCharacterOfPosition(tokenInfo.token.pos).line;
+                                var indentation_1 = computeIndentation(tokenInfo.token, startLine, -1 /* Unknown */, parent, parentDynamicIndentation, parentStartLine);
+                                listDynamicIndentation = getDynamicIndentation(parent, parentStartLine, indentation_1.indentation, indentation_1.delta);
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
+                            }
+                            else {
+                                // consume any tokens that precede the list as child elements of 'node' using its indentation scope
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, parentDynamicIndentation);
+                            }
+                        }
+                    }
+                    var inheritedIndentation = -1 /* Unknown */;
+                    for (var i = 0; i < nodes.length; i++) {
+                        var child = nodes[i];
+                        inheritedIndentation = processChildNode(child, inheritedIndentation, node, listDynamicIndentation, startLine, startLine, /*isListItem*/ true, /*isFirstListItem*/ i === 0);
+                    }
+                    if (listEndToken !== 0 /* Unknown */) {
+                        if (formattingScanner.isOnToken()) {
+                            var tokenInfo = formattingScanner.readTokenInfo(parent);
+                            // consume the list end token only if it is still belong to the parent
+                            // there might be the case when current token matches end token but does not considered as one
+                            // function (x: function) <--
+                            // without this check close paren will be interpreted as list end token for function expression which is wrong
+                            if (tokenInfo.token.kind === listEndToken && ts.rangeContainsRange(parent, tokenInfo.token)) {
+                                // consume list end token
+                                consumeTokenAndAdvanceScanner(tokenInfo, parent, listDynamicIndentation);
+                            }
+                        }
+                    }
+                }
+                function consumeTokenAndAdvanceScanner(currentTokenInfo, parent, dynamicIndentation, container) {
+                    ts.Debug.assert(ts.rangeContainsRange(parent, currentTokenInfo.token));
+                    var lastTriviaWasNewLine = formattingScanner.lastTrailingTriviaWasNewLine();
+                    var indentToken = false;
+                    if (currentTokenInfo.leadingTrivia) {
+                        processTrivia(currentTokenInfo.leadingTrivia, parent, childContextNode, dynamicIndentation);
+                    }
+                    var lineAdded;
+                    var isTokenInRange = ts.rangeContainsRange(originalRange, currentTokenInfo.token);
+                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(currentTokenInfo.token.pos);
+                    if (isTokenInRange) {
+                        var rangeHasError = rangeContainsError(currentTokenInfo.token);
+                        // save previousRange since processRange will overwrite this value with current one
+                        var savePreviousRange = previousRange;
+                        lineAdded = processRange(currentTokenInfo.token, tokenStart, parent, childContextNode, dynamicIndentation);
+                        if (rangeHasError) {
+                            // do not indent comments\token if token range overlaps with some error
+                            indentToken = false;
+                        }
+                        else {
+                            if (lineAdded !== undefined) {
+                                indentToken = lineAdded;
+                            }
+                            else {
+                                // indent token only if end line of previous range does not match start line of the token
+                                var prevEndLine = savePreviousRange && sourceFile.getLineAndCharacterOfPosition(savePreviousRange.end).line;
+                                indentToken = lastTriviaWasNewLine && tokenStart.line !== prevEndLine;
+                            }
+                        }
+                    }
+                    if (currentTokenInfo.trailingTrivia) {
+                        processTrivia(currentTokenInfo.trailingTrivia, parent, childContextNode, dynamicIndentation);
+                    }
+                    if (indentToken) {
+                        var tokenIndentation = (isTokenInRange && !rangeContainsError(currentTokenInfo.token)) ?
+                            dynamicIndentation.getIndentationForToken(tokenStart.line, currentTokenInfo.token.kind, container) :
+                            -1 /* Unknown */;
+                        var indentNextTokenOrTrivia = true;
+                        if (currentTokenInfo.leadingTrivia) {
+                            var commentIndentation = dynamicIndentation.getIndentationForComment(currentTokenInfo.token.kind, tokenIndentation, container);
+                            for (var _i = 0, _a = currentTokenInfo.leadingTrivia; _i < _a.length; _i++) {
+                                var triviaItem = _a[_i];
+                                var triviaInRange = ts.rangeContainsRange(originalRange, triviaItem);
+                                switch (triviaItem.kind) {
+                                    case 3 /* MultiLineCommentTrivia */:
+                                        if (triviaInRange) {
+                                            indentMultilineComment(triviaItem, commentIndentation, /*firstLineIsIndented*/ !indentNextTokenOrTrivia);
+                                        }
+                                        indentNextTokenOrTrivia = false;
+                                        break;
+                                    case 2 /* SingleLineCommentTrivia */:
+                                        if (indentNextTokenOrTrivia && triviaInRange) {
+                                            insertIndentation(triviaItem.pos, commentIndentation, /*lineAdded*/ false);
+                                        }
+                                        indentNextTokenOrTrivia = false;
+                                        break;
+                                    case 4 /* NewLineTrivia */:
+                                        indentNextTokenOrTrivia = true;
+                                        break;
+                                }
+                            }
+                        }
+                        // indent token only if is it is in target range and does not overlap with any error ranges
+                        if (tokenIndentation !== -1 /* Unknown */ && indentNextTokenOrTrivia) {
+                            insertIndentation(currentTokenInfo.token.pos, tokenIndentation, lineAdded);
+                            lastIndentedLine = tokenStart.line;
+                            indentationOnLastIndentedLine = tokenIndentation;
+                        }
+                    }
+                    formattingScanner.advance();
+                    childContextNode = parent;
+                }
+            }
+            function processTrivia(trivia, parent, contextNode, dynamicIndentation) {
+                for (var _i = 0, trivia_1 = trivia; _i < trivia_1.length; _i++) {
+                    var triviaItem = trivia_1[_i];
+                    if (ts.isComment(triviaItem.kind) && ts.rangeContainsRange(originalRange, triviaItem)) {
+                        var triviaItemStart = sourceFile.getLineAndCharacterOfPosition(triviaItem.pos);
+                        processRange(triviaItem, triviaItemStart, parent, contextNode, dynamicIndentation);
+                    }
+                }
+            }
+            function processRange(range, rangeStart, parent, contextNode, dynamicIndentation) {
+                var rangeHasError = rangeContainsError(range);
+                var lineAdded;
+                if (!rangeHasError && !previousRangeHasError) {
+                    if (!previousRange) {
+                        // trim whitespaces starting from the beginning of the span up to the current line
+                        var originalStart = sourceFile.getLineAndCharacterOfPosition(originalRange.pos);
+                        trimTrailingWhitespacesForLines(originalStart.line, rangeStart.line);
+                    }
+                    else {
+                        lineAdded =
+                            processPair(range, rangeStart.line, parent, previousRange, previousRangeStartLine, previousParent, contextNode, dynamicIndentation);
+                    }
+                }
+                previousRange = range;
+                previousParent = parent;
+                previousRangeStartLine = rangeStart.line;
+                previousRangeHasError = rangeHasError;
+                return lineAdded;
+            }
+            function processPair(currentItem, currentStartLine, currentParent, previousItem, previousStartLine, previousParent, contextNode, dynamicIndentation) {
+                formattingContext.updateContext(previousItem, previousParent, currentItem, currentParent, contextNode);
+                var rule = rulesProvider.getRulesMap().GetRule(formattingContext);
+                var trimTrailingWhitespaces;
+                var lineAdded;
+                if (rule) {
+                    applyRuleEdits(rule, previousItem, previousStartLine, currentItem, currentStartLine);
+                    if (rule.Operation.Action & (2 /* Space */ | 8 /* Delete */) && currentStartLine !== previousStartLine) {
+                        lineAdded = false;
+                        // Handle the case where the next line is moved to be the end of this line.
+                        // In this case we don't indent the next line in the next pass.
+                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
+                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ false);
+                        }
+                    }
+                    else if (rule.Operation.Action & 4 /* NewLine */ && currentStartLine === previousStartLine) {
+                        lineAdded = true;
+                        // Handle the case where token2 is moved to the new line.
+                        // In this case we indent token2 in the next pass but we set
+                        // sameLineIndent flag to notify the indenter that the indentation is within the line.
+                        if (currentParent.getStart(sourceFile) === currentItem.pos) {
+                            dynamicIndentation.recomputeIndentation(/*lineAddedByFormatting*/ true);
+                        }
+                    }
+                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
+                    trimTrailingWhitespaces = !(rule.Operation.Action & 8 /* Delete */) && rule.Flag !== 1 /* CanDeleteNewLines */;
+                }
+                else {
+                    trimTrailingWhitespaces = true;
+                }
+                if (currentStartLine !== previousStartLine && trimTrailingWhitespaces) {
+                    // We need to trim trailing whitespace between the tokens if they were on different lines, and no rule was applied to put them on the same line
+                    trimTrailingWhitespacesForLines(previousStartLine, currentStartLine, previousItem);
+                }
+                return lineAdded;
+            }
+            function insertIndentation(pos, indentation, lineAdded) {
+                var indentationString = getIndentationString(indentation, options);
+                if (lineAdded) {
+                    // new line is added before the token by the formatting rules
+                    // insert indentation string at the very beginning of the token
+                    recordReplace(pos, 0, indentationString);
+                }
+                else {
+                    var tokenStart = sourceFile.getLineAndCharacterOfPosition(pos);
+                    var startLinePosition = ts.getStartPositionOfLine(tokenStart.line, sourceFile);
+                    if (indentation !== tokenStart.character || indentationIsDifferent(indentationString, startLinePosition)) {
+                        recordReplace(startLinePosition, tokenStart.character, indentationString);
+                    }
+                }
+            }
+            function indentationIsDifferent(indentationString, startLinePosition) {
+                return indentationString !== sourceFile.text.substr(startLinePosition, indentationString.length);
+            }
+            function indentMultilineComment(commentRange, indentation, firstLineIsIndented) {
+                // split comment in lines
+                var startLine = sourceFile.getLineAndCharacterOfPosition(commentRange.pos).line;
+                var endLine = sourceFile.getLineAndCharacterOfPosition(commentRange.end).line;
+                var parts;
+                if (startLine === endLine) {
+                    if (!firstLineIsIndented) {
+                        // treat as single line comment
+                        insertIndentation(commentRange.pos, indentation, /*lineAdded*/ false);
+                    }
+                    return;
+                }
+                else {
+                    parts = [];
+                    var startPos = commentRange.pos;
+                    for (var line = startLine; line < endLine; line++) {
+                        var endOfLine = ts.getEndLinePosition(line, sourceFile);
+                        parts.push({ pos: startPos, end: endOfLine });
+                        startPos = ts.getStartPositionOfLine(line + 1, sourceFile);
+                    }
+                    parts.push({ pos: startPos, end: commentRange.end });
+                }
+                var startLinePos = ts.getStartPositionOfLine(startLine, sourceFile);
+                var nonWhitespaceColumnInFirstPart = formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(startLinePos, parts[0].pos, sourceFile, options);
+                if (indentation === nonWhitespaceColumnInFirstPart.column) {
+                    return;
+                }
+                var startIndex = 0;
+                if (firstLineIsIndented) {
+                    startIndex = 1;
+                    startLine++;
+                }
+                // shift all parts on the delta size
+                var delta = indentation - nonWhitespaceColumnInFirstPart.column;
+                for (var i = startIndex, len = parts.length; i < len; i++, startLine++) {
+                    var startLinePos_1 = ts.getStartPositionOfLine(startLine, sourceFile);
+                    var nonWhitespaceCharacterAndColumn = i === 0
+                        ? nonWhitespaceColumnInFirstPart
+                        : formatting.SmartIndenter.findFirstNonWhitespaceCharacterAndColumn(parts[i].pos, parts[i].end, sourceFile, options);
+                    var newIndentation = nonWhitespaceCharacterAndColumn.column + delta;
+                    if (newIndentation > 0) {
+                        var indentationString = getIndentationString(newIndentation, options);
+                        recordReplace(startLinePos_1, nonWhitespaceCharacterAndColumn.character, indentationString);
+                    }
+                    else {
+                        recordDelete(startLinePos_1, nonWhitespaceCharacterAndColumn.character);
+                    }
+                }
+            }
+            function trimTrailingWhitespacesForLines(line1, line2, range) {
+                for (var line = line1; line < line2; line++) {
+                    var lineStartPosition = ts.getStartPositionOfLine(line, sourceFile);
+                    var lineEndPosition = ts.getEndLinePosition(line, sourceFile);
+                    // do not trim whitespaces in comments or template expression
+                    if (range && (ts.isComment(range.kind) || ts.isStringOrRegularExpressionOrTemplateLiteral(range.kind)) && range.pos <= lineEndPosition && range.end > lineEndPosition) {
+                        continue;
+                    }
+                    var whitespaceStart = getTrailingWhitespaceStartPosition(lineStartPosition, lineEndPosition);
+                    if (whitespaceStart !== -1) {
+                        ts.Debug.assert(whitespaceStart === lineStartPosition || !ts.isWhiteSpace(sourceFile.text.charCodeAt(whitespaceStart - 1)));
+                        recordDelete(whitespaceStart, lineEndPosition + 1 - whitespaceStart);
+                    }
+                }
+            }
+            /**
+             * @param start The position of the first character in range
+             * @param end The position of the last character in range
+             */
+            function getTrailingWhitespaceStartPosition(start, end) {
+                var pos = end;
+                while (pos >= start && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
+                    pos--;
+                }
+                if (pos !== end) {
+                    return pos + 1;
+                }
+                return -1;
+            }
+            /**
+             * Trimming will be done for lines after the previous range
+             */
+            function trimTrailingWhitespacesForRemainingRange() {
+                var startPosition = previousRange ? previousRange.end : originalRange.pos;
+                var startLine = sourceFile.getLineAndCharacterOfPosition(startPosition).line;
+                var endLine = sourceFile.getLineAndCharacterOfPosition(originalRange.end).line;
+                trimTrailingWhitespacesForLines(startLine, endLine + 1, previousRange);
+            }
+            function newTextChange(start, len, newText) {
+                return { span: ts.createTextSpan(start, len), newText: newText };
+            }
+            function recordDelete(start, len) {
+                if (len) {
+                    edits.push(newTextChange(start, len, ""));
+                }
+            }
+            function recordReplace(start, len, newText) {
+                if (len || newText) {
+                    edits.push(newTextChange(start, len, newText));
+                }
+            }
+            function applyRuleEdits(rule, previousRange, previousStartLine, currentRange, currentStartLine) {
+                switch (rule.Operation.Action) {
+                    case 1 /* Ignore */:
+                        // no action required
+                        return;
+                    case 8 /* Delete */:
+                        if (previousRange.end !== currentRange.pos) {
+                            // delete characters starting from t1.end up to t2.pos exclusive
+                            recordDelete(previousRange.end, currentRange.pos - previousRange.end);
+                        }
+                        break;
+                    case 4 /* NewLine */:
+                        // exit early if we on different lines and rule cannot change number of newlines
+                        // if line1 and line2 are on subsequent lines then no edits are required - ok to exit
+                        // if line1 and line2 are separated with more than one newline - ok to exit since we cannot delete extra new lines
+                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
+                            return;
+                        }
+                        // edit should not be applied only if we have one line feed between elements
+                        var lineDelta = currentStartLine - previousStartLine;
+                        if (lineDelta !== 1) {
+                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, options.NewLineCharacter);
+                        }
+                        break;
+                    case 2 /* Space */:
+                        // exit early if we on different lines and rule cannot change number of newlines
+                        if (rule.Flag !== 1 /* CanDeleteNewLines */ && previousStartLine !== currentStartLine) {
+                            return;
+                        }
+                        var posDelta = currentRange.pos - previousRange.end;
+                        if (posDelta !== 1 || sourceFile.text.charCodeAt(previousRange.end) !== 32 /* space */) {
+                            recordReplace(previousRange.end, currentRange.pos - previousRange.end, " ");
+                        }
+                        break;
+                }
+            }
+        }
+        function getOpenTokenForList(node, list) {
+            switch (node.kind) {
+                case 148 /* Constructor */:
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 180 /* ArrowFunction */:
+                    if (node.typeParameters === list) {
+                        return 25 /* LessThanToken */;
+                    }
+                    else if (node.parameters === list) {
+                        return 17 /* OpenParenToken */;
+                    }
+                    break;
+                case 174 /* CallExpression */:
+                case 175 /* NewExpression */:
+                    if (node.typeArguments === list) {
+                        return 25 /* LessThanToken */;
+                    }
+                    else if (node.arguments === list) {
+                        return 17 /* OpenParenToken */;
+                    }
+                    break;
+                case 155 /* TypeReference */:
+                    if (node.typeArguments === list) {
+                        return 25 /* LessThanToken */;
+                    }
+            }
+            return 0 /* Unknown */;
+        }
+        function getCloseTokenForOpenToken(kind) {
+            switch (kind) {
+                case 17 /* OpenParenToken */:
+                    return 18 /* CloseParenToken */;
+                case 25 /* LessThanToken */:
+                    return 27 /* GreaterThanToken */;
+            }
+            return 0 /* Unknown */;
+        }
+        var internedSizes;
+        var internedTabsIndentation;
+        var internedSpacesIndentation;
+        function getIndentationString(indentation, options) {
+            // reset interned strings if FormatCodeOptions were changed
+            var resetInternedStrings = !internedSizes || (internedSizes.tabSize !== options.TabSize || internedSizes.indentSize !== options.IndentSize);
+            if (resetInternedStrings) {
+                internedSizes = { tabSize: options.TabSize, indentSize: options.IndentSize };
+                internedTabsIndentation = internedSpacesIndentation = undefined;
+            }
+            if (!options.ConvertTabsToSpaces) {
+                var tabs = Math.floor(indentation / options.TabSize);
+                var spaces = indentation - tabs * options.TabSize;
+                var tabString = void 0;
+                if (!internedTabsIndentation) {
+                    internedTabsIndentation = [];
+                }
+                if (internedTabsIndentation[tabs] === undefined) {
+                    internedTabsIndentation[tabs] = tabString = repeat("\t", tabs);
+                }
+                else {
+                    tabString = internedTabsIndentation[tabs];
+                }
+                return spaces ? tabString + repeat(" ", spaces) : tabString;
+            }
+            else {
+                var spacesString = void 0;
+                var quotient = Math.floor(indentation / options.IndentSize);
+                var remainder = indentation % options.IndentSize;
+                if (!internedSpacesIndentation) {
+                    internedSpacesIndentation = [];
+                }
+                if (internedSpacesIndentation[quotient] === undefined) {
+                    spacesString = repeat(" ", options.IndentSize * quotient);
+                    internedSpacesIndentation[quotient] = spacesString;
+                }
+                else {
+                    spacesString = internedSpacesIndentation[quotient];
+                }
+                return remainder ? spacesString + repeat(" ", remainder) : spacesString;
+            }
+            function repeat(value, count) {
+                var s = "";
+                for (var i = 0; i < count; i++) {
+                    s += value;
+                }
+                return s;
+            }
+        }
+        formatting.getIndentationString = getIndentationString;
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+///<reference path='..\services.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var formatting;
+    (function (formatting) {
+        var SmartIndenter;
+        (function (SmartIndenter) {
+            var Value;
+            (function (Value) {
+                Value[Value["Unknown"] = -1] = "Unknown";
+            })(Value || (Value = {}));
+            function getIndentation(position, sourceFile, options) {
+                if (position > sourceFile.text.length) {
+                    return 0; // past EOF
+                }
+                // no indentation when the indent style is set to none,
+                // so we can return fast
+                if (options.IndentStyle === ts.IndentStyle.None) {
+                    return 0;
+                }
+                var precedingToken = ts.findPrecedingToken(position, sourceFile);
+                if (!precedingToken) {
+                    return 0;
+                }
+                // no indentation in string \regex\template literals
+                var precedingTokenIsLiteral = ts.isStringOrRegularExpressionOrTemplateLiteral(precedingToken.kind);
+                if (precedingTokenIsLiteral && precedingToken.getStart(sourceFile) <= position && precedingToken.end > position) {
+                    return 0;
+                }
+                var lineAtPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
+                // indentation is first non-whitespace character in a previous line
+                // for block indentation, we should look for a line which contains something that's not
+                // whitespace.
+                if (options.IndentStyle === ts.IndentStyle.Block) {
+                    // move backwards until we find a line with a non-whitespace character,
+                    // then find the first non-whitespace character for that line.
+                    var current_1 = position;
+                    while (current_1 > 0) {
+                        var char = sourceFile.text.charCodeAt(current_1);
+                        if (!ts.isWhiteSpace(char) && !ts.isLineBreak(char)) {
+                            break;
+                        }
+                        current_1--;
+                    }
+                    var lineStart = ts.getLineStartPositionForPosition(current_1, sourceFile);
+                    return SmartIndenter.findFirstNonWhitespaceColumn(lineStart, current_1, sourceFile, options);
+                }
+                if (precedingToken.kind === 24 /* CommaToken */ && precedingToken.parent.kind !== 187 /* BinaryExpression */) {
+                    // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
+                    var actualIndentation = getActualIndentationForListItemBeforeComma(precedingToken, sourceFile, options);
+                    if (actualIndentation !== -1 /* Unknown */) {
+                        return actualIndentation;
+                    }
+                }
+                // try to find node that can contribute to indentation and includes 'position' starting from 'precedingToken'
+                // if such node is found - compute initial indentation for 'position' inside this node
+                var previous;
+                var current = precedingToken;
+                var currentStart;
+                var indentationDelta;
+                while (current) {
+                    if (ts.positionBelongsToNode(current, position, sourceFile) && shouldIndentChildNode(current, previous)) {
+                        currentStart = getStartLineAndCharacterForNode(current, sourceFile);
+                        if (nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile)) {
+                            indentationDelta = 0;
+                        }
+                        else {
+                            indentationDelta = lineAtPosition !== currentStart.line ? options.IndentSize : 0;
+                        }
+                        break;
+                    }
+                    // check if current node is a list item - if yes, take indentation from it
+                    var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
+                    if (actualIndentation !== -1 /* Unknown */) {
+                        return actualIndentation;
+                    }
+                    actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
+                    if (actualIndentation !== -1 /* Unknown */) {
+                        return actualIndentation + options.IndentSize;
+                    }
+                    previous = current;
+                    current = current.parent;
+                }
+                if (!current) {
+                    // no parent was found - return 0 to be indented on the level of SourceFile
+                    return 0;
+                }
+                return getIndentationForNodeWorker(current, currentStart, /*ignoreActualIndentationRange*/ undefined, indentationDelta, sourceFile, options);
+            }
+            SmartIndenter.getIndentation = getIndentation;
+            function getIndentationForNode(n, ignoreActualIndentationRange, sourceFile, options) {
+                var start = sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+                return getIndentationForNodeWorker(n, start, ignoreActualIndentationRange, /*indentationDelta*/ 0, sourceFile, options);
+            }
+            SmartIndenter.getIndentationForNode = getIndentationForNode;
+            function getIndentationForNodeWorker(current, currentStart, ignoreActualIndentationRange, indentationDelta, sourceFile, options) {
+                var parent = current.parent;
+                var parentStart;
+                // walk upwards and collect indentations for pairs of parent-child nodes
+                // indentation is not added if parent and child nodes start on the same line or if parent is IfStatement and child starts on the same line with 'else clause'
+                while (parent) {
+                    var useActualIndentation = true;
+                    if (ignoreActualIndentationRange) {
+                        var start = current.getStart(sourceFile);
+                        useActualIndentation = start < ignoreActualIndentationRange.pos || start > ignoreActualIndentationRange.end;
+                    }
+                    if (useActualIndentation) {
+                        // check if current node is a list item - if yes, take indentation from it
+                        var actualIndentation = getActualIndentationForListItem(current, sourceFile, options);
+                        if (actualIndentation !== -1 /* Unknown */) {
+                            return actualIndentation + indentationDelta;
+                        }
+                    }
+                    parentStart = getParentStart(parent, current, sourceFile);
+                    var parentAndChildShareLine = parentStart.line === currentStart.line ||
+                        childStartsOnTheSameLineWithElseInIfStatement(parent, current, currentStart.line, sourceFile);
+                    if (useActualIndentation) {
+                        // try to fetch actual indentation for current node from source text
+                        var actualIndentation = getActualIndentationForNode(current, parent, currentStart, parentAndChildShareLine, sourceFile, options);
+                        if (actualIndentation !== -1 /* Unknown */) {
+                            return actualIndentation + indentationDelta;
+                        }
+                        actualIndentation = getLineIndentationWhenExpressionIsInMultiLine(current, sourceFile, options);
+                        if (actualIndentation !== -1 /* Unknown */) {
+                            return actualIndentation + indentationDelta;
+                        }
+                    }
+                    // increase indentation if parent node wants its content to be indented and parent and child nodes don't start on the same line
+                    if (shouldIndentChildNode(parent, current) && !parentAndChildShareLine) {
+                        indentationDelta += options.IndentSize;
+                    }
+                    current = parent;
+                    currentStart = parentStart;
+                    parent = current.parent;
+                }
+                return indentationDelta;
+            }
+            function getParentStart(parent, child, sourceFile) {
+                var containingList = getContainingList(child, sourceFile);
+                if (containingList) {
+                    return sourceFile.getLineAndCharacterOfPosition(containingList.pos);
+                }
+                return sourceFile.getLineAndCharacterOfPosition(parent.getStart(sourceFile));
+            }
+            /*
+             * Function returns Value.Unknown if indentation cannot be determined
+             */
+            function getActualIndentationForListItemBeforeComma(commaToken, sourceFile, options) {
+                // previous token is comma that separates items in list - find the previous item and try to derive indentation from it
+                var commaItemInfo = ts.findListItemInfo(commaToken);
+                if (commaItemInfo && commaItemInfo.listItemIndex > 0) {
+                    return deriveActualIndentationFromList(commaItemInfo.list.getChildren(), commaItemInfo.listItemIndex - 1, sourceFile, options);
+                }
+                else {
+                    // handle broken code gracefully
+                    return -1 /* Unknown */;
+                }
+            }
+            /*
+             * Function returns Value.Unknown if actual indentation for node should not be used (i.e because node is nested expression)
+             */
+            function getActualIndentationForNode(current, parent, currentLineAndChar, parentAndChildShareLine, sourceFile, options) {
+                // actual indentation is used for statements\declarations if one of cases below is true:
+                // - parent is SourceFile - by default immediate children of SourceFile are not indented except when user indents them manually
+                // - parent and child are not on the same line
+                var useActualIndentation = (ts.isDeclaration(current) || ts.isStatement(current)) &&
+                    (parent.kind === 256 /* SourceFile */ || !parentAndChildShareLine);
+                if (!useActualIndentation) {
+                    return -1 /* Unknown */;
+                }
+                return findColumnForFirstNonWhitespaceCharacterInLine(currentLineAndChar, sourceFile, options);
+            }
+            function nextTokenIsCurlyBraceOnSameLineAsCursor(precedingToken, current, lineAtPosition, sourceFile) {
+                var nextToken = ts.findNextToken(precedingToken, current);
+                if (!nextToken) {
+                    return false;
+                }
+                if (nextToken.kind === 15 /* OpenBraceToken */) {
+                    // open braces are always indented at the parent level
+                    return true;
+                }
+                else if (nextToken.kind === 16 /* CloseBraceToken */) {
+                    // close braces are indented at the parent level if they are located on the same line with cursor
+                    // this means that if new line will be added at $ position, this case will be indented
+                    // class A {
+                    //    $
+                    // }
+                    /// and this one - not
+                    // class A {
+                    // $}
+                    var nextTokenStartLine = getStartLineAndCharacterForNode(nextToken, sourceFile).line;
+                    return lineAtPosition === nextTokenStartLine;
+                }
+                return false;
+            }
+            function getStartLineAndCharacterForNode(n, sourceFile) {
+                return sourceFile.getLineAndCharacterOfPosition(n.getStart(sourceFile));
+            }
+            function childStartsOnTheSameLineWithElseInIfStatement(parent, child, childStartLine, sourceFile) {
+                if (parent.kind === 203 /* IfStatement */ && parent.elseStatement === child) {
+                    var elseKeyword = ts.findChildOfKind(parent, 80 /* ElseKeyword */, sourceFile);
+                    ts.Debug.assert(elseKeyword !== undefined);
+                    var elseKeywordStartLine = getStartLineAndCharacterForNode(elseKeyword, sourceFile).line;
+                    return elseKeywordStartLine === childStartLine;
+                }
+                return false;
+            }
+            SmartIndenter.childStartsOnTheSameLineWithElseInIfStatement = childStartsOnTheSameLineWithElseInIfStatement;
+            function getContainingList(node, sourceFile) {
+                if (node.parent) {
+                    switch (node.parent.kind) {
+                        case 155 /* TypeReference */:
+                            if (node.parent.typeArguments &&
+                                ts.rangeContainsStartEnd(node.parent.typeArguments, node.getStart(sourceFile), node.getEnd())) {
+                                return node.parent.typeArguments;
+                            }
+                            break;
+                        case 171 /* ObjectLiteralExpression */:
+                            return node.parent.properties;
+                        case 170 /* ArrayLiteralExpression */:
+                            return node.parent.elements;
+                        case 220 /* FunctionDeclaration */:
+                        case 179 /* FunctionExpression */:
+                        case 180 /* ArrowFunction */:
+                        case 147 /* MethodDeclaration */:
+                        case 146 /* MethodSignature */:
+                        case 151 /* CallSignature */:
+                        case 152 /* ConstructSignature */: {
+                            var start = node.getStart(sourceFile);
+                            if (node.parent.typeParameters &&
+                                ts.rangeContainsStartEnd(node.parent.typeParameters, start, node.getEnd())) {
+                                return node.parent.typeParameters;
+                            }
+                            if (ts.rangeContainsStartEnd(node.parent.parameters, start, node.getEnd())) {
+                                return node.parent.parameters;
+                            }
+                            break;
+                        }
+                        case 175 /* NewExpression */:
+                        case 174 /* CallExpression */: {
+                            var start = node.getStart(sourceFile);
+                            if (node.parent.typeArguments &&
+                                ts.rangeContainsStartEnd(node.parent.typeArguments, start, node.getEnd())) {
+                                return node.parent.typeArguments;
+                            }
+                            if (node.parent.arguments &&
+                                ts.rangeContainsStartEnd(node.parent.arguments, start, node.getEnd())) {
+                                return node.parent.arguments;
+                            }
+                            break;
+                        }
+                    }
+                }
+                return undefined;
+            }
+            function getActualIndentationForListItem(node, sourceFile, options) {
+                var containingList = getContainingList(node, sourceFile);
+                return containingList ? getActualIndentationFromList(containingList) : -1 /* Unknown */;
+                function getActualIndentationFromList(list) {
+                    var index = ts.indexOf(list, node);
+                    return index !== -1 ? deriveActualIndentationFromList(list, index, sourceFile, options) : -1 /* Unknown */;
+                }
+            }
+            function getLineIndentationWhenExpressionIsInMultiLine(node, sourceFile, options) {
+                // actual indentation should not be used when:
+                // - node is close parenthesis - this is the end of the expression
+                if (node.kind === 18 /* CloseParenToken */) {
+                    return -1 /* Unknown */;
+                }
+                if (node.parent && (node.parent.kind === 174 /* CallExpression */ ||
+                    node.parent.kind === 175 /* NewExpression */) &&
+                    node.parent.expression !== node) {
+                    var fullCallOrNewExpression = node.parent.expression;
+                    var startingExpression = getStartingExpression(fullCallOrNewExpression);
+                    if (fullCallOrNewExpression === startingExpression) {
+                        return -1 /* Unknown */;
+                    }
+                    var fullCallOrNewExpressionEnd = sourceFile.getLineAndCharacterOfPosition(fullCallOrNewExpression.end);
+                    var startingExpressionEnd = sourceFile.getLineAndCharacterOfPosition(startingExpression.end);
+                    if (fullCallOrNewExpressionEnd.line === startingExpressionEnd.line) {
+                        return -1 /* Unknown */;
+                    }
+                    return findColumnForFirstNonWhitespaceCharacterInLine(fullCallOrNewExpressionEnd, sourceFile, options);
+                }
+                return -1 /* Unknown */;
+                function getStartingExpression(node) {
+                    while (true) {
+                        switch (node.kind) {
+                            case 174 /* CallExpression */:
+                            case 175 /* NewExpression */:
+                            case 172 /* PropertyAccessExpression */:
+                            case 173 /* ElementAccessExpression */:
+                                node = node.expression;
+                                break;
+                            default:
+                                return node;
+                        }
+                    }
+                }
+            }
+            function deriveActualIndentationFromList(list, index, sourceFile, options) {
+                ts.Debug.assert(index >= 0 && index < list.length);
+                var node = list[index];
+                // walk toward the start of the list starting from current node and check if the line is the same for all items.
+                // if end line for item [i - 1] differs from the start line for item [i] - find column of the first non-whitespace character on the line of item [i]
+                var lineAndCharacter = getStartLineAndCharacterForNode(node, sourceFile);
+                for (var i = index - 1; i >= 0; i--) {
+                    if (list[i].kind === 24 /* CommaToken */) {
+                        continue;
+                    }
+                    // skip list items that ends on the same line with the current list element
+                    var prevEndLine = sourceFile.getLineAndCharacterOfPosition(list[i].end).line;
+                    if (prevEndLine !== lineAndCharacter.line) {
+                        return findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options);
+                    }
+                    lineAndCharacter = getStartLineAndCharacterForNode(list[i], sourceFile);
+                }
+                return -1 /* Unknown */;
+            }
+            function findColumnForFirstNonWhitespaceCharacterInLine(lineAndCharacter, sourceFile, options) {
+                var lineStart = sourceFile.getPositionOfLineAndCharacter(lineAndCharacter.line, 0);
+                return findFirstNonWhitespaceColumn(lineStart, lineStart + lineAndCharacter.character, sourceFile, options);
+            }
+            /*
+                Character is the actual index of the character since the beginning of the line.
+                Column - position of the character after expanding tabs to spaces
+                "0\t2$"
+                value of 'character' for '$' is 3
+                value of 'column' for '$' is 6 (assuming that tab size is 4)
+            */
+            function findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options) {
+                var character = 0;
+                var column = 0;
+                for (var pos = startPos; pos < endPos; pos++) {
+                    var ch = sourceFile.text.charCodeAt(pos);
+                    if (!ts.isWhiteSpace(ch)) {
+                        break;
+                    }
+                    if (ch === 9 /* tab */) {
+                        column += options.TabSize + (column % options.TabSize);
+                    }
+                    else {
+                        column++;
+                    }
+                    character++;
+                }
+                return { column: column, character: character };
+            }
+            SmartIndenter.findFirstNonWhitespaceCharacterAndColumn = findFirstNonWhitespaceCharacterAndColumn;
+            function findFirstNonWhitespaceColumn(startPos, endPos, sourceFile, options) {
+                return findFirstNonWhitespaceCharacterAndColumn(startPos, endPos, sourceFile, options).column;
+            }
+            SmartIndenter.findFirstNonWhitespaceColumn = findFirstNonWhitespaceColumn;
+            function nodeContentIsAlwaysIndented(kind) {
+                switch (kind) {
+                    case 202 /* ExpressionStatement */:
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 223 /* TypeAliasDeclaration */:
+                    case 170 /* ArrayLiteralExpression */:
+                    case 199 /* Block */:
+                    case 226 /* ModuleBlock */:
+                    case 171 /* ObjectLiteralExpression */:
+                    case 159 /* TypeLiteral */:
+                    case 161 /* TupleType */:
+                    case 227 /* CaseBlock */:
+                    case 250 /* DefaultClause */:
+                    case 249 /* CaseClause */:
+                    case 178 /* ParenthesizedExpression */:
+                    case 172 /* PropertyAccessExpression */:
+                    case 174 /* CallExpression */:
+                    case 175 /* NewExpression */:
+                    case 200 /* VariableStatement */:
+                    case 218 /* VariableDeclaration */:
+                    case 235 /* ExportAssignment */:
+                    case 211 /* ReturnStatement */:
+                    case 188 /* ConditionalExpression */:
+                    case 168 /* ArrayBindingPattern */:
+                    case 167 /* ObjectBindingPattern */:
+                    case 243 /* JsxOpeningElement */:
+                    case 242 /* JsxSelfClosingElement */:
+                    case 248 /* JsxExpression */:
+                    case 146 /* MethodSignature */:
+                    case 151 /* CallSignature */:
+                    case 152 /* ConstructSignature */:
+                    case 142 /* Parameter */:
+                    case 156 /* FunctionType */:
+                    case 157 /* ConstructorType */:
+                    case 164 /* ParenthesizedType */:
+                    case 176 /* TaggedTemplateExpression */:
+                    case 184 /* AwaitExpression */:
+                    case 233 /* NamedImports */:
+                        return true;
+                }
+                return false;
+            }
+            /* @internal */
+            function nodeWillIndentChild(parent, child, indentByDefault) {
+                var childKind = child ? child.kind : 0 /* Unknown */;
+                switch (parent.kind) {
+                    case 204 /* DoStatement */:
+                    case 205 /* WhileStatement */:
+                    case 207 /* ForInStatement */:
+                    case 208 /* ForOfStatement */:
+                    case 206 /* ForStatement */:
+                    case 203 /* IfStatement */:
+                    case 220 /* FunctionDeclaration */:
+                    case 179 /* FunctionExpression */:
+                    case 147 /* MethodDeclaration */:
+                    case 180 /* ArrowFunction */:
+                    case 148 /* Constructor */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        return childKind !== 199 /* Block */;
+                    case 241 /* JsxElement */:
+                        return childKind !== 245 /* JsxClosingElement */;
+                }
+                // No explicit rule for given nodes so the result will follow the default value argument
+                return indentByDefault;
+            }
+            SmartIndenter.nodeWillIndentChild = nodeWillIndentChild;
+            /*
+            Function returns true when the parent node should indent the given child by an explicit rule
+            */
+            function shouldIndentChildNode(parent, child) {
+                return nodeContentIsAlwaysIndented(parent.kind) || nodeWillIndentChild(parent, child, /*indentByDefault*/ false);
+            }
+            SmartIndenter.shouldIndentChildNode = shouldIndentChildNode;
+        })(SmartIndenter = formatting.SmartIndenter || (formatting.SmartIndenter = {}));
+    })(formatting = ts.formatting || (ts.formatting = {}));
+})(ts || (ts = {}));
+/// <reference path="..\compiler\program.ts"/>
+/// <reference path='breakpoints.ts' />
+/// <reference path='outliningElementsCollector.ts' />
+/// <reference path='navigateTo.ts' />
+/// <reference path='navigationBar.ts' />
+/// <reference path='patternMatcher.ts' />
+/// <reference path='signatureHelp.ts' />
+/// <reference path='utilities.ts' />
+/// <reference path='jsTyping.ts' />
+/// <reference path='formatting\formatting.ts' />
+/// <reference path='formatting\smartIndenter.ts' />
+var ts;
+(function (ts) {
+    /** The version of the language service API */
+    ts.servicesVersion = "0.5";
+    var ScriptSnapshot;
+    (function (ScriptSnapshot) {
+        var StringScriptSnapshot = (function () {
+            function StringScriptSnapshot(text) {
+                this.text = text;
+            }
+            StringScriptSnapshot.prototype.getText = function (start, end) {
+                return this.text.substring(start, end);
+            };
+            StringScriptSnapshot.prototype.getLength = function () {
+                return this.text.length;
+            };
+            StringScriptSnapshot.prototype.getChangeRange = function (oldSnapshot) {
+                // Text-based snapshots do not support incremental parsing. Return undefined
+                // to signal that to the caller.
+                return undefined;
+            };
+            return StringScriptSnapshot;
+        }());
+        function fromString(text) {
+            return new StringScriptSnapshot(text);
+        }
+        ScriptSnapshot.fromString = fromString;
+    })(ScriptSnapshot = ts.ScriptSnapshot || (ts.ScriptSnapshot = {}));
+    var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ true);
+    var emptyArray = [];
+    var jsDocTagNames = [
+        "augments",
+        "author",
+        "argument",
+        "borrows",
+        "class",
+        "constant",
+        "constructor",
+        "constructs",
+        "default",
+        "deprecated",
+        "description",
+        "event",
+        "example",
+        "extends",
+        "field",
+        "fileOverview",
+        "function",
+        "ignore",
+        "inner",
+        "lends",
+        "link",
+        "memberOf",
+        "name",
+        "namespace",
+        "param",
+        "private",
+        "property",
+        "public",
+        "requires",
+        "returns",
+        "see",
+        "since",
+        "static",
+        "throws",
+        "type",
+        "typedef",
+        "property",
+        "prop",
+        "version"
+    ];
+    var jsDocCompletionEntries;
+    function createNode(kind, pos, end, flags, parent) {
+        var node = new NodeObject(kind, pos, end);
+        node.flags = flags;
+        node.parent = parent;
+        return node;
+    }
+    var NodeObject = (function () {
+        function NodeObject(kind, pos, end) {
+            this.kind = kind;
+            this.pos = pos;
+            this.end = end;
+            this.flags = 0 /* None */;
+            this.parent = undefined;
+        }
+        NodeObject.prototype.getSourceFile = function () {
+            return ts.getSourceFileOfNode(this);
+        };
+        NodeObject.prototype.getStart = function (sourceFile, includeJsDocComment) {
+            return ts.getTokenPosOfNode(this, sourceFile, includeJsDocComment);
+        };
+        NodeObject.prototype.getFullStart = function () {
+            return this.pos;
+        };
+        NodeObject.prototype.getEnd = function () {
+            return this.end;
+        };
+        NodeObject.prototype.getWidth = function (sourceFile) {
+            return this.getEnd() - this.getStart(sourceFile);
+        };
+        NodeObject.prototype.getFullWidth = function () {
+            return this.end - this.pos;
+        };
+        NodeObject.prototype.getLeadingTriviaWidth = function (sourceFile) {
+            return this.getStart(sourceFile) - this.pos;
+        };
+        NodeObject.prototype.getFullText = function (sourceFile) {
+            return (sourceFile || this.getSourceFile()).text.substring(this.pos, this.end);
+        };
+        NodeObject.prototype.getText = function (sourceFile) {
+            return (sourceFile || this.getSourceFile()).text.substring(this.getStart(), this.getEnd());
+        };
+        NodeObject.prototype.addSyntheticNodes = function (nodes, pos, end, useJSDocScanner) {
+            scanner.setTextPos(pos);
+            while (pos < end) {
+                var token = useJSDocScanner ? scanner.scanJSDocToken() : scanner.scan();
+                var textPos = scanner.getTextPos();
+                if (textPos <= end) {
+                    nodes.push(createNode(token, pos, textPos, 0, this));
+                }
+                pos = textPos;
+            }
+            return pos;
+        };
+        NodeObject.prototype.createSyntaxList = function (nodes) {
+            var list = createNode(282 /* SyntaxList */, nodes.pos, nodes.end, 0, this);
+            list._children = [];
+            var pos = nodes.pos;
+            for (var _i = 0, nodes_7 = nodes; _i < nodes_7.length; _i++) {
+                var node = nodes_7[_i];
+                if (pos < node.pos) {
+                    pos = this.addSyntheticNodes(list._children, pos, node.pos);
+                }
+                list._children.push(node);
+                pos = node.end;
+            }
+            if (pos < nodes.end) {
+                this.addSyntheticNodes(list._children, pos, nodes.end);
+            }
+            return list;
+        };
+        NodeObject.prototype.createChildren = function (sourceFile) {
+            var _this = this;
+            var children;
+            if (this.kind >= 139 /* FirstNode */) {
+                scanner.setText((sourceFile || this.getSourceFile()).text);
+                children = [];
+                var pos_3 = this.pos;
+                var useJSDocScanner_1 = this.kind >= 273 /* FirstJSDocTagNode */ && this.kind <= 281 /* LastJSDocTagNode */;
+                var processNode = function (node) {
+                    if (pos_3 < node.pos) {
+                        pos_3 = _this.addSyntheticNodes(children, pos_3, node.pos, useJSDocScanner_1);
+                    }
+                    children.push(node);
+                    pos_3 = node.end;
+                };
+                var processNodes = function (nodes) {
+                    if (pos_3 < nodes.pos) {
+                        pos_3 = _this.addSyntheticNodes(children, pos_3, nodes.pos, useJSDocScanner_1);
+                    }
+                    children.push(_this.createSyntaxList(nodes));
+                    pos_3 = nodes.end;
+                };
+                // jsDocComments need to be the first children
+                if (this.jsDocComments) {
+                    for (var _i = 0, _a = this.jsDocComments; _i < _a.length; _i++) {
+                        var jsDocComment = _a[_i];
+                        processNode(jsDocComment);
+                    }
+                }
+                ts.forEachChild(this, processNode, processNodes);
+                if (pos_3 < this.end) {
+                    this.addSyntheticNodes(children, pos_3, this.end);
+                }
+                scanner.setText(undefined);
+            }
+            this._children = children || emptyArray;
+        };
+        NodeObject.prototype.getChildCount = function (sourceFile) {
+            if (!this._children)
+                this.createChildren(sourceFile);
+            return this._children.length;
+        };
+        NodeObject.prototype.getChildAt = function (index, sourceFile) {
+            if (!this._children)
+                this.createChildren(sourceFile);
+            return this._children[index];
+        };
+        NodeObject.prototype.getChildren = function (sourceFile) {
+            if (!this._children)
+                this.createChildren(sourceFile);
+            return this._children;
+        };
+        NodeObject.prototype.getFirstToken = function (sourceFile) {
+            var children = this.getChildren(sourceFile);
+            if (!children.length) {
+                return undefined;
+            }
+            var child = children[0];
+            return child.kind < 139 /* FirstNode */ ? child : child.getFirstToken(sourceFile);
+        };
+        NodeObject.prototype.getLastToken = function (sourceFile) {
+            var children = this.getChildren(sourceFile);
+            var child = ts.lastOrUndefined(children);
+            if (!child) {
+                return undefined;
+            }
+            return child.kind < 139 /* FirstNode */ ? child : child.getLastToken(sourceFile);
+        };
+        return NodeObject;
+    }());
+    var SymbolObject = (function () {
+        function SymbolObject(flags, name) {
+            this.flags = flags;
+            this.name = name;
+        }
+        SymbolObject.prototype.getFlags = function () {
+            return this.flags;
+        };
+        SymbolObject.prototype.getName = function () {
+            return this.name;
+        };
+        SymbolObject.prototype.getDeclarations = function () {
+            return this.declarations;
+        };
+        SymbolObject.prototype.getDocumentationComment = function () {
+            if (this.documentationComment === undefined) {
+                this.documentationComment = getJsDocCommentsFromDeclarations(this.declarations, this.name, !(this.flags & 4 /* Property */));
+            }
+            return this.documentationComment;
+        };
+        return SymbolObject;
+    }());
+    function getJsDocCommentsFromDeclarations(declarations, name, canUseParsedParamTagComments) {
+        var documentationComment = [];
+        var docComments = getJsDocCommentsSeparatedByNewLines();
+        ts.forEach(docComments, function (docComment) {
+            if (documentationComment.length) {
+                documentationComment.push(ts.lineBreakPart());
+            }
+            documentationComment.push(docComment);
+        });
+        return documentationComment;
+        function getJsDocCommentsSeparatedByNewLines() {
+            var paramTag = "@param";
+            var jsDocCommentParts = [];
+            ts.forEach(declarations, function (declaration, indexOfDeclaration) {
+                // Make sure we are collecting doc comment from declaration once,
+                // In case of union property there might be same declaration multiple times
+                // which only varies in type parameter
+                // Eg. const a: Array<string> | Array<number>; a.length
+                // The property length will have two declarations of property length coming
+                // from Array<T> - Array<string> and Array<number>
+                if (ts.indexOf(declarations, declaration) === indexOfDeclaration) {
+                    var sourceFileOfDeclaration = ts.getSourceFileOfNode(declaration);
+                    // If it is parameter - try and get the jsDoc comment with @param tag from function declaration's jsDoc comments
+                    if (canUseParsedParamTagComments && declaration.kind === 142 /* Parameter */) {
+                        if ((declaration.parent.kind === 179 /* FunctionExpression */ || declaration.parent.kind === 180 /* ArrowFunction */) &&
+                            declaration.parent.parent.kind === 218 /* VariableDeclaration */) {
+                            addCommentParts(declaration.parent.parent.parent, sourceFileOfDeclaration, getCleanedParamJsDocComment);
+                        }
+                        addCommentParts(declaration.parent, sourceFileOfDeclaration, getCleanedParamJsDocComment);
+                    }
+                    // If this is left side of dotted module declaration, there is no doc comments associated with this node
+                    if (declaration.kind === 225 /* ModuleDeclaration */ && declaration.body.kind === 225 /* ModuleDeclaration */) {
+                        return;
+                    }
+                    if ((declaration.kind === 179 /* FunctionExpression */ || declaration.kind === 180 /* ArrowFunction */) &&
+                        declaration.parent.kind === 218 /* VariableDeclaration */) {
+                        addCommentParts(declaration.parent.parent, sourceFileOfDeclaration, getCleanedJsDocComment);
+                    }
+                    // If this is dotted module name, get the doc comments from the parent
+                    while (declaration.kind === 225 /* ModuleDeclaration */ && declaration.parent.kind === 225 /* ModuleDeclaration */) {
+                        declaration = declaration.parent;
+                    }
+                    addCommentParts(declaration.kind === 218 /* VariableDeclaration */ ? declaration.parent.parent : declaration, sourceFileOfDeclaration, getCleanedJsDocComment);
+                    if (declaration.kind === 218 /* VariableDeclaration */) {
+                        var init = declaration.initializer;
+                        if (init && (init.kind === 179 /* FunctionExpression */ || init.kind === 180 /* ArrowFunction */)) {
+                            // Get the cleaned js doc comment text from the initializer
+                            addCommentParts(init, sourceFileOfDeclaration, getCleanedJsDocComment);
+                        }
+                    }
+                }
+            });
+            return jsDocCommentParts;
+            function addCommentParts(commented, sourceFileOfDeclaration, getCommentPart) {
+                var ranges = getJsDocCommentTextRange(commented, sourceFileOfDeclaration);
+                // Get the cleaned js doc comment text from the declaration
+                ts.forEach(ranges, function (jsDocCommentTextRange) {
+                    var cleanedComment = getCommentPart(jsDocCommentTextRange.pos, jsDocCommentTextRange.end, sourceFileOfDeclaration);
+                    if (cleanedComment) {
+                        ts.addRange(jsDocCommentParts, cleanedComment);
+                    }
+                });
+            }
+            function getJsDocCommentTextRange(node, sourceFile) {
+                return ts.map(ts.getJsDocComments(node, sourceFile), function (jsDocComment) {
+                    return {
+                        pos: jsDocComment.pos + "/*".length,
+                        end: jsDocComment.end - "*/".length // Trim off comment end indicator
+                    };
+                });
+            }
+            function consumeWhiteSpacesOnTheLine(pos, end, sourceFile, maxSpacesToRemove) {
+                if (maxSpacesToRemove !== undefined) {
+                    end = Math.min(end, pos + maxSpacesToRemove);
+                }
+                for (; pos < end; pos++) {
+                    var ch = sourceFile.text.charCodeAt(pos);
+                    if (!ts.isWhiteSpace(ch) || ts.isLineBreak(ch)) {
+                        // Either found lineBreak or non whiteSpace
+                        return pos;
+                    }
+                }
+                return end;
+            }
+            function consumeLineBreaks(pos, end, sourceFile) {
+                while (pos < end && ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
+                    pos++;
+                }
+                return pos;
+            }
+            function isName(pos, end, sourceFile, name) {
+                return pos + name.length < end &&
+                    sourceFile.text.substr(pos, name.length) === name &&
+                    (ts.isWhiteSpace(sourceFile.text.charCodeAt(pos + name.length)) ||
+                        ts.isLineBreak(sourceFile.text.charCodeAt(pos + name.length)));
+            }
+            function isParamTag(pos, end, sourceFile) {
+                // If it is @param tag
+                return isName(pos, end, sourceFile, paramTag);
+            }
+            function pushDocCommentLineText(docComments, text, blankLineCount) {
+                // Add the empty lines in between texts
+                while (blankLineCount) {
+                    blankLineCount--;
+                    docComments.push(ts.textPart(""));
+                }
+                docComments.push(ts.textPart(text));
+            }
+            function getCleanedJsDocComment(pos, end, sourceFile) {
+                var spacesToRemoveAfterAsterisk;
+                var docComments = [];
+                var blankLineCount = 0;
+                var isInParamTag = false;
+                while (pos < end) {
+                    var docCommentTextOfLine = "";
+                    // First consume leading white space
+                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile);
+                    // If the comment starts with '*' consume the spaces on this line
+                    if (pos < end && sourceFile.text.charCodeAt(pos) === 42 /* asterisk */) {
+                        var lineStartPos = pos + 1;
+                        pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, spacesToRemoveAfterAsterisk);
+                        // Set the spaces to remove after asterisk as margin if not already set
+                        if (spacesToRemoveAfterAsterisk === undefined && pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
+                            spacesToRemoveAfterAsterisk = pos - lineStartPos;
+                        }
+                    }
+                    else if (spacesToRemoveAfterAsterisk === undefined) {
+                        spacesToRemoveAfterAsterisk = 0;
+                    }
+                    // Analyze text on this line
+                    while (pos < end && !ts.isLineBreak(sourceFile.text.charCodeAt(pos))) {
+                        var ch = sourceFile.text.charAt(pos);
+                        if (ch === "@") {
+                            // If it is @param tag
+                            if (isParamTag(pos, end, sourceFile)) {
+                                isInParamTag = true;
+                                pos += paramTag.length;
+                                continue;
+                            }
+                            else {
+                                isInParamTag = false;
+                            }
+                        }
+                        // Add the ch to doc text if we arent in param tag
+                        if (!isInParamTag) {
+                            docCommentTextOfLine += ch;
+                        }
+                        // Scan next character
+                        pos++;
+                    }
+                    // Continue with next line
+                    pos = consumeLineBreaks(pos, end, sourceFile);
+                    if (docCommentTextOfLine) {
+                        pushDocCommentLineText(docComments, docCommentTextOfLine, blankLineCount);
+                        blankLineCount = 0;
+                    }
+                    else if (!isInParamTag && docComments.length) {
+                        // This is blank line when there is text already parsed
+                        blankLineCount++;
+                    }
+                }
+                return docComments;
+            }
+            function getCleanedParamJsDocComment(pos, end, sourceFile) {
+                var paramHelpStringMargin;
+                var paramDocComments = [];
+                while (pos < end) {
+                    if (isParamTag(pos, end, sourceFile)) {
+                        var blankLineCount = 0;
+                        var recordedParamTag = false;
+                        // Consume leading spaces
+                        pos = consumeWhiteSpaces(pos + paramTag.length);
+                        if (pos >= end) {
+                            break;
+                        }
+                        // Ignore type expression
+                        if (sourceFile.text.charCodeAt(pos) === 123 /* openBrace */) {
+                            pos++;
+                            for (var curlies = 1; pos < end; pos++) {
+                                var charCode = sourceFile.text.charCodeAt(pos);
+                                // { character means we need to find another } to match the found one
+                                if (charCode === 123 /* openBrace */) {
+                                    curlies++;
+                                    continue;
+                                }
+                                // } char
+                                if (charCode === 125 /* closeBrace */) {
+                                    curlies--;
+                                    if (curlies === 0) {
+                                        // We do not have any more } to match the type expression is ignored completely
+                                        pos++;
+                                        break;
+                                    }
+                                    else {
+                                        // there are more { to be matched with }
+                                        continue;
+                                    }
+                                }
+                                // Found start of another tag
+                                if (charCode === 64 /* at */) {
+                                    break;
+                                }
+                            }
+                            // Consume white spaces
+                            pos = consumeWhiteSpaces(pos);
+                            if (pos >= end) {
+                                break;
+                            }
+                        }
+                        // Parameter name
+                        if (isName(pos, end, sourceFile, name)) {
+                            // Found the parameter we are looking for consume white spaces
+                            pos = consumeWhiteSpaces(pos + name.length);
+                            if (pos >= end) {
+                                break;
+                            }
+                            var paramHelpString = "";
+                            var firstLineParamHelpStringPos = pos;
+                            while (pos < end) {
+                                var ch = sourceFile.text.charCodeAt(pos);
+                                // at line break, set this comment line text and go to next line
+                                if (ts.isLineBreak(ch)) {
+                                    if (paramHelpString) {
+                                        pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
+                                        paramHelpString = "";
+                                        blankLineCount = 0;
+                                        recordedParamTag = true;
+                                    }
+                                    else if (recordedParamTag) {
+                                        blankLineCount++;
+                                    }
+                                    // Get the pos after cleaning start of the line
+                                    setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos);
+                                    continue;
+                                }
+                                // Done scanning param help string - next tag found
+                                if (ch === 64 /* at */) {
+                                    break;
+                                }
+                                paramHelpString += sourceFile.text.charAt(pos);
+                                // Go to next character
+                                pos++;
+                            }
+                            // If there is param help text, add it top the doc comments
+                            if (paramHelpString) {
+                                pushDocCommentLineText(paramDocComments, paramHelpString, blankLineCount);
+                            }
+                            paramHelpStringMargin = undefined;
+                        }
+                        // If this is the start of another tag, continue with the loop in search of param tag with symbol name
+                        if (sourceFile.text.charCodeAt(pos) === 64 /* at */) {
+                            continue;
+                        }
+                    }
+                    // Next character
+                    pos++;
+                }
+                return paramDocComments;
+                function consumeWhiteSpaces(pos) {
+                    while (pos < end && ts.isWhiteSpace(sourceFile.text.charCodeAt(pos))) {
+                        pos++;
+                    }
+                    return pos;
+                }
+                function setPosForParamHelpStringOnNextLine(firstLineParamHelpStringPos) {
+                    // Get the pos after consuming line breaks
+                    pos = consumeLineBreaks(pos, end, sourceFile);
+                    if (pos >= end) {
+                        return;
+                    }
+                    if (paramHelpStringMargin === undefined) {
+                        paramHelpStringMargin = sourceFile.getLineAndCharacterOfPosition(firstLineParamHelpStringPos).character;
+                    }
+                    // Now consume white spaces max
+                    var startOfLinePos = pos;
+                    pos = consumeWhiteSpacesOnTheLine(pos, end, sourceFile, paramHelpStringMargin);
+                    if (pos >= end) {
+                        return;
+                    }
+                    var consumedSpaces = pos - startOfLinePos;
+                    if (consumedSpaces < paramHelpStringMargin) {
+                        var ch = sourceFile.text.charCodeAt(pos);
+                        if (ch === 42 /* asterisk */) {
+                            // Consume more spaces after asterisk
+                            pos = consumeWhiteSpacesOnTheLine(pos + 1, end, sourceFile, paramHelpStringMargin - consumedSpaces - 1);
+                        }
+                    }
+                }
+            }
+        }
+    }
+    var TypeObject = (function () {
+        function TypeObject(checker, flags) {
+            this.checker = checker;
+            this.flags = flags;
+        }
+        TypeObject.prototype.getFlags = function () {
+            return this.flags;
+        };
+        TypeObject.prototype.getSymbol = function () {
+            return this.symbol;
+        };
+        TypeObject.prototype.getProperties = function () {
+            return this.checker.getPropertiesOfType(this);
+        };
+        TypeObject.prototype.getProperty = function (propertyName) {
+            return this.checker.getPropertyOfType(this, propertyName);
+        };
+        TypeObject.prototype.getApparentProperties = function () {
+            return this.checker.getAugmentedPropertiesOfType(this);
+        };
+        TypeObject.prototype.getCallSignatures = function () {
+            return this.checker.getSignaturesOfType(this, 0 /* Call */);
+        };
+        TypeObject.prototype.getConstructSignatures = function () {
+            return this.checker.getSignaturesOfType(this, 1 /* Construct */);
+        };
+        TypeObject.prototype.getStringIndexType = function () {
+            return this.checker.getIndexTypeOfType(this, 0 /* String */);
+        };
+        TypeObject.prototype.getNumberIndexType = function () {
+            return this.checker.getIndexTypeOfType(this, 1 /* Number */);
+        };
+        TypeObject.prototype.getBaseTypes = function () {
+            return this.flags & (1024 /* Class */ | 2048 /* Interface */)
+                ? this.checker.getBaseTypes(this)
+                : undefined;
+        };
+        TypeObject.prototype.getNonNullableType = function () {
+            return this.checker.getNonNullableType(this);
+        };
+        return TypeObject;
+    }());
+    var SignatureObject = (function () {
+        function SignatureObject(checker) {
+            this.checker = checker;
+        }
+        SignatureObject.prototype.getDeclaration = function () {
+            return this.declaration;
+        };
+        SignatureObject.prototype.getTypeParameters = function () {
+            return this.typeParameters;
+        };
+        SignatureObject.prototype.getParameters = function () {
+            return this.parameters;
+        };
+        SignatureObject.prototype.getReturnType = function () {
+            return this.checker.getReturnTypeOfSignature(this);
+        };
+        SignatureObject.prototype.getDocumentationComment = function () {
+            if (this.documentationComment === undefined) {
+                this.documentationComment = this.declaration ? getJsDocCommentsFromDeclarations([this.declaration], 
+                /*name*/ undefined, 
+                /*canUseParsedParamTagComments*/ false) : [];
+            }
+            return this.documentationComment;
+        };
+        return SignatureObject;
+    }());
+    var SourceFileObject = (function (_super) {
+        __extends(SourceFileObject, _super);
+        function SourceFileObject(kind, pos, end) {
+            _super.call(this, kind, pos, end);
+        }
+        SourceFileObject.prototype.update = function (newText, textChangeRange) {
+            return ts.updateSourceFile(this, newText, textChangeRange);
+        };
+        SourceFileObject.prototype.getLineAndCharacterOfPosition = function (position) {
+            return ts.getLineAndCharacterOfPosition(this, position);
+        };
+        SourceFileObject.prototype.getLineStarts = function () {
+            return ts.getLineStarts(this);
+        };
+        SourceFileObject.prototype.getPositionOfLineAndCharacter = function (line, character) {
+            return ts.getPositionOfLineAndCharacter(this, line, character);
+        };
+        SourceFileObject.prototype.getNamedDeclarations = function () {
+            if (!this.namedDeclarations) {
+                this.namedDeclarations = this.computeNamedDeclarations();
+            }
+            return this.namedDeclarations;
+        };
+        SourceFileObject.prototype.computeNamedDeclarations = function () {
+            var result = {};
+            ts.forEachChild(this, visit);
+            return result;
+            function addDeclaration(declaration) {
+                var name = getDeclarationName(declaration);
+                if (name) {
+                    var declarations = getDeclarations(name);
+                    declarations.push(declaration);
+                }
+            }
+            function getDeclarations(name) {
+                return ts.getProperty(result, name) || (result[name] = []);
+            }
+            function getDeclarationName(declaration) {
+                if (declaration.name) {
+                    var result_2 = getTextOfIdentifierOrLiteral(declaration.name);
+                    if (result_2 !== undefined) {
+                        return result_2;
+                    }
+                    if (declaration.name.kind === 140 /* ComputedPropertyName */) {
+                        var expr = declaration.name.expression;
+                        if (expr.kind === 172 /* PropertyAccessExpression */) {
+                            return expr.name.text;
+                        }
+                        return getTextOfIdentifierOrLiteral(expr);
+                    }
+                }
+                return undefined;
+            }
+            function getTextOfIdentifierOrLiteral(node) {
+                if (node) {
+                    if (node.kind === 69 /* Identifier */ ||
+                        node.kind === 9 /* StringLiteral */ ||
+                        node.kind === 8 /* NumericLiteral */) {
+                        return node.text;
+                    }
+                }
+                return undefined;
+            }
+            function visit(node) {
+                switch (node.kind) {
+                    case 220 /* FunctionDeclaration */:
+                    case 179 /* FunctionExpression */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        var functionDeclaration = node;
+                        var declarationName = getDeclarationName(functionDeclaration);
+                        if (declarationName) {
+                            var declarations = getDeclarations(declarationName);
+                            var lastDeclaration = ts.lastOrUndefined(declarations);
+                            // Check whether this declaration belongs to an "overload group".
+                            if (lastDeclaration && functionDeclaration.parent === lastDeclaration.parent && functionDeclaration.symbol === lastDeclaration.symbol) {
+                                // Overwrite the last declaration if it was an overload
+                                // and this one is an implementation.
+                                if (functionDeclaration.body && !lastDeclaration.body) {
+                                    declarations[declarations.length - 1] = functionDeclaration;
+                                }
+                            }
+                            else {
+                                declarations.push(functionDeclaration);
+                            }
+                            ts.forEachChild(node, visit);
+                        }
+                        break;
+                    case 221 /* ClassDeclaration */:
+                    case 192 /* ClassExpression */:
+                    case 222 /* InterfaceDeclaration */:
+                    case 223 /* TypeAliasDeclaration */:
+                    case 224 /* EnumDeclaration */:
+                    case 225 /* ModuleDeclaration */:
+                    case 229 /* ImportEqualsDeclaration */:
+                    case 238 /* ExportSpecifier */:
+                    case 234 /* ImportSpecifier */:
+                    case 229 /* ImportEqualsDeclaration */:
+                    case 231 /* ImportClause */:
+                    case 232 /* NamespaceImport */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 159 /* TypeLiteral */:
+                        addDeclaration(node);
+                        ts.forEachChild(node, visit);
+                        break;
+                    case 142 /* Parameter */:
+                        // Only consider parameter properties
+                        if (!(node.flags & 92 /* ParameterPropertyModifier */)) {
+                            break;
+                        }
+                    // fall through
+                    case 218 /* VariableDeclaration */:
+                    case 169 /* BindingElement */: {
+                        var decl = node;
+                        if (ts.isBindingPattern(decl.name)) {
+                            ts.forEachChild(decl.name, visit);
+                            break;
+                        }
+                        if (decl.initializer)
+                            visit(decl.initializer);
+                    }
+                    case 255 /* EnumMember */:
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                        addDeclaration(node);
+                        break;
+                    case 236 /* ExportDeclaration */:
+                        // Handle named exports case e.g.:
+                        //    export {a, b as B} from "mod";
+                        if (node.exportClause) {
+                            ts.forEach(node.exportClause.elements, visit);
+                        }
+                        break;
+                    case 230 /* ImportDeclaration */:
+                        var importClause = node.importClause;
+                        if (importClause) {
+                            // Handle default import case e.g.:
+                            //    import d from "mod";
+                            if (importClause.name) {
+                                addDeclaration(importClause);
+                            }
+                            // Handle named bindings in imports e.g.:
+                            //    import * as NS from "mod";
+                            //    import {a, b as B} from "mod";
+                            if (importClause.namedBindings) {
+                                if (importClause.namedBindings.kind === 232 /* NamespaceImport */) {
+                                    addDeclaration(importClause.namedBindings);
+                                }
+                                else {
+                                    ts.forEach(importClause.namedBindings.elements, visit);
+                                }
+                            }
+                        }
+                        break;
+                    default:
+                        ts.forEachChild(node, visit);
+                }
+            }
+        };
+        return SourceFileObject;
+    }(NodeObject));
+    var TextChange = (function () {
+        function TextChange() {
+        }
+        return TextChange;
+    }());
+    ts.TextChange = TextChange;
+    var HighlightSpanKind;
+    (function (HighlightSpanKind) {
+        HighlightSpanKind.none = "none";
+        HighlightSpanKind.definition = "definition";
+        HighlightSpanKind.reference = "reference";
+        HighlightSpanKind.writtenReference = "writtenReference";
+    })(HighlightSpanKind = ts.HighlightSpanKind || (ts.HighlightSpanKind = {}));
+    (function (IndentStyle) {
+        IndentStyle[IndentStyle["None"] = 0] = "None";
+        IndentStyle[IndentStyle["Block"] = 1] = "Block";
+        IndentStyle[IndentStyle["Smart"] = 2] = "Smart";
+    })(ts.IndentStyle || (ts.IndentStyle = {}));
+    var IndentStyle = ts.IndentStyle;
+    (function (SymbolDisplayPartKind) {
+        SymbolDisplayPartKind[SymbolDisplayPartKind["aliasName"] = 0] = "aliasName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["className"] = 1] = "className";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["enumName"] = 2] = "enumName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["fieldName"] = 3] = "fieldName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["interfaceName"] = 4] = "interfaceName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["keyword"] = 5] = "keyword";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["lineBreak"] = 6] = "lineBreak";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["numericLiteral"] = 7] = "numericLiteral";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["stringLiteral"] = 8] = "stringLiteral";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["localName"] = 9] = "localName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["methodName"] = 10] = "methodName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["moduleName"] = 11] = "moduleName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["operator"] = 12] = "operator";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["parameterName"] = 13] = "parameterName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["propertyName"] = 14] = "propertyName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["punctuation"] = 15] = "punctuation";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["space"] = 16] = "space";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["text"] = 17] = "text";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["typeParameterName"] = 18] = "typeParameterName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["enumMemberName"] = 19] = "enumMemberName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["functionName"] = 20] = "functionName";
+        SymbolDisplayPartKind[SymbolDisplayPartKind["regularExpressionLiteral"] = 21] = "regularExpressionLiteral";
+    })(ts.SymbolDisplayPartKind || (ts.SymbolDisplayPartKind = {}));
+    var SymbolDisplayPartKind = ts.SymbolDisplayPartKind;
+    (function (OutputFileType) {
+        OutputFileType[OutputFileType["JavaScript"] = 0] = "JavaScript";
+        OutputFileType[OutputFileType["SourceMap"] = 1] = "SourceMap";
+        OutputFileType[OutputFileType["Declaration"] = 2] = "Declaration";
+    })(ts.OutputFileType || (ts.OutputFileType = {}));
+    var OutputFileType = ts.OutputFileType;
+    (function (EndOfLineState) {
+        EndOfLineState[EndOfLineState["None"] = 0] = "None";
+        EndOfLineState[EndOfLineState["InMultiLineCommentTrivia"] = 1] = "InMultiLineCommentTrivia";
+        EndOfLineState[EndOfLineState["InSingleQuoteStringLiteral"] = 2] = "InSingleQuoteStringLiteral";
+        EndOfLineState[EndOfLineState["InDoubleQuoteStringLiteral"] = 3] = "InDoubleQuoteStringLiteral";
+        EndOfLineState[EndOfLineState["InTemplateHeadOrNoSubstitutionTemplate"] = 4] = "InTemplateHeadOrNoSubstitutionTemplate";
+        EndOfLineState[EndOfLineState["InTemplateMiddleOrTail"] = 5] = "InTemplateMiddleOrTail";
+        EndOfLineState[EndOfLineState["InTemplateSubstitutionPosition"] = 6] = "InTemplateSubstitutionPosition";
+    })(ts.EndOfLineState || (ts.EndOfLineState = {}));
+    var EndOfLineState = ts.EndOfLineState;
+    (function (TokenClass) {
+        TokenClass[TokenClass["Punctuation"] = 0] = "Punctuation";
+        TokenClass[TokenClass["Keyword"] = 1] = "Keyword";
+        TokenClass[TokenClass["Operator"] = 2] = "Operator";
+        TokenClass[TokenClass["Comment"] = 3] = "Comment";
+        TokenClass[TokenClass["Whitespace"] = 4] = "Whitespace";
+        TokenClass[TokenClass["Identifier"] = 5] = "Identifier";
+        TokenClass[TokenClass["NumberLiteral"] = 6] = "NumberLiteral";
+        TokenClass[TokenClass["StringLiteral"] = 7] = "StringLiteral";
+        TokenClass[TokenClass["RegExpLiteral"] = 8] = "RegExpLiteral";
+    })(ts.TokenClass || (ts.TokenClass = {}));
+    var TokenClass = ts.TokenClass;
+    // TODO: move these to enums
+    var ScriptElementKind;
+    (function (ScriptElementKind) {
+        ScriptElementKind.unknown = "";
+        ScriptElementKind.warning = "warning";
+        /** predefined type (void) or keyword (class) */
+        ScriptElementKind.keyword = "keyword";
+        /** top level script node */
+        ScriptElementKind.scriptElement = "script";
+        /** module foo {} */
+        ScriptElementKind.moduleElement = "module";
+        /** class X {} */
+        ScriptElementKind.classElement = "class";
+        /** var x = class X {} */
+        ScriptElementKind.localClassElement = "local class";
+        /** interface Y {} */
+        ScriptElementKind.interfaceElement = "interface";
+        /** type T = ... */
+        ScriptElementKind.typeElement = "type";
+        /** enum E */
+        ScriptElementKind.enumElement = "enum";
+        /**
+         * Inside module and script only
+         * const v = ..
+         */
+        ScriptElementKind.variableElement = "var";
+        /** Inside function */
+        ScriptElementKind.localVariableElement = "local var";
+        /**
+         * Inside module and script only
+         * function f() { }
+         */
+        ScriptElementKind.functionElement = "function";
+        /** Inside function */
+        ScriptElementKind.localFunctionElement = "local function";
+        /** class X { [public|private]* foo() {} } */
+        ScriptElementKind.memberFunctionElement = "method";
+        /** class X { [public|private]* [get|set] foo:number; } */
+        ScriptElementKind.memberGetAccessorElement = "getter";
+        ScriptElementKind.memberSetAccessorElement = "setter";
+        /**
+         * class X { [public|private]* foo:number; }
+         * interface Y { foo:number; }
+         */
+        ScriptElementKind.memberVariableElement = "property";
+        /** class X { constructor() { } } */
+        ScriptElementKind.constructorImplementationElement = "constructor";
+        /** interface Y { ():number; } */
+        ScriptElementKind.callSignatureElement = "call";
+        /** interface Y { []:number; } */
+        ScriptElementKind.indexSignatureElement = "index";
+        /** interface Y { new():Y; } */
+        ScriptElementKind.constructSignatureElement = "construct";
+        /** function foo(*Y*: string) */
+        ScriptElementKind.parameterElement = "parameter";
+        ScriptElementKind.typeParameterElement = "type parameter";
+        ScriptElementKind.primitiveType = "primitive type";
+        ScriptElementKind.label = "label";
+        ScriptElementKind.alias = "alias";
+        ScriptElementKind.constElement = "const";
+        ScriptElementKind.letElement = "let";
+    })(ScriptElementKind = ts.ScriptElementKind || (ts.ScriptElementKind = {}));
+    var ScriptElementKindModifier;
+    (function (ScriptElementKindModifier) {
+        ScriptElementKindModifier.none = "";
+        ScriptElementKindModifier.publicMemberModifier = "public";
+        ScriptElementKindModifier.privateMemberModifier = "private";
+        ScriptElementKindModifier.protectedMemberModifier = "protected";
+        ScriptElementKindModifier.exportedModifier = "export";
+        ScriptElementKindModifier.ambientModifier = "declare";
+        ScriptElementKindModifier.staticModifier = "static";
+        ScriptElementKindModifier.abstractModifier = "abstract";
+    })(ScriptElementKindModifier = ts.ScriptElementKindModifier || (ts.ScriptElementKindModifier = {}));
+    var ClassificationTypeNames = (function () {
+        function ClassificationTypeNames() {
+        }
+        ClassificationTypeNames.comment = "comment";
+        ClassificationTypeNames.identifier = "identifier";
+        ClassificationTypeNames.keyword = "keyword";
+        ClassificationTypeNames.numericLiteral = "number";
+        ClassificationTypeNames.operator = "operator";
+        ClassificationTypeNames.stringLiteral = "string";
+        ClassificationTypeNames.whiteSpace = "whitespace";
+        ClassificationTypeNames.text = "text";
+        ClassificationTypeNames.punctuation = "punctuation";
+        ClassificationTypeNames.className = "class name";
+        ClassificationTypeNames.enumName = "enum name";
+        ClassificationTypeNames.interfaceName = "interface name";
+        ClassificationTypeNames.moduleName = "module name";
+        ClassificationTypeNames.typeParameterName = "type parameter name";
+        ClassificationTypeNames.typeAliasName = "type alias name";
+        ClassificationTypeNames.parameterName = "parameter name";
+        ClassificationTypeNames.docCommentTagName = "doc comment tag name";
+        ClassificationTypeNames.jsxOpenTagName = "jsx open tag name";
+        ClassificationTypeNames.jsxCloseTagName = "jsx close tag name";
+        ClassificationTypeNames.jsxSelfClosingTagName = "jsx self closing tag name";
+        ClassificationTypeNames.jsxAttribute = "jsx attribute";
+        ClassificationTypeNames.jsxText = "jsx text";
+        ClassificationTypeNames.jsxAttributeStringLiteralValue = "jsx attribute string literal value";
+        return ClassificationTypeNames;
+    }());
+    ts.ClassificationTypeNames = ClassificationTypeNames;
+    (function (ClassificationType) {
+        ClassificationType[ClassificationType["comment"] = 1] = "comment";
+        ClassificationType[ClassificationType["identifier"] = 2] = "identifier";
+        ClassificationType[ClassificationType["keyword"] = 3] = "keyword";
+        ClassificationType[ClassificationType["numericLiteral"] = 4] = "numericLiteral";
+        ClassificationType[ClassificationType["operator"] = 5] = "operator";
+        ClassificationType[ClassificationType["stringLiteral"] = 6] = "stringLiteral";
+        ClassificationType[ClassificationType["regularExpressionLiteral"] = 7] = "regularExpressionLiteral";
+        ClassificationType[ClassificationType["whiteSpace"] = 8] = "whiteSpace";
+        ClassificationType[ClassificationType["text"] = 9] = "text";
+        ClassificationType[ClassificationType["punctuation"] = 10] = "punctuation";
+        ClassificationType[ClassificationType["className"] = 11] = "className";
+        ClassificationType[ClassificationType["enumName"] = 12] = "enumName";
+        ClassificationType[ClassificationType["interfaceName"] = 13] = "interfaceName";
+        ClassificationType[ClassificationType["moduleName"] = 14] = "moduleName";
+        ClassificationType[ClassificationType["typeParameterName"] = 15] = "typeParameterName";
+        ClassificationType[ClassificationType["typeAliasName"] = 16] = "typeAliasName";
+        ClassificationType[ClassificationType["parameterName"] = 17] = "parameterName";
+        ClassificationType[ClassificationType["docCommentTagName"] = 18] = "docCommentTagName";
+        ClassificationType[ClassificationType["jsxOpenTagName"] = 19] = "jsxOpenTagName";
+        ClassificationType[ClassificationType["jsxCloseTagName"] = 20] = "jsxCloseTagName";
+        ClassificationType[ClassificationType["jsxSelfClosingTagName"] = 21] = "jsxSelfClosingTagName";
+        ClassificationType[ClassificationType["jsxAttribute"] = 22] = "jsxAttribute";
+        ClassificationType[ClassificationType["jsxText"] = 23] = "jsxText";
+        ClassificationType[ClassificationType["jsxAttributeStringLiteralValue"] = 24] = "jsxAttributeStringLiteralValue";
+    })(ts.ClassificationType || (ts.ClassificationType = {}));
+    var ClassificationType = ts.ClassificationType;
+    function displayPartsToString(displayParts) {
+        if (displayParts) {
+            return ts.map(displayParts, function (displayPart) { return displayPart.text; }).join("");
+        }
+        return "";
+    }
+    ts.displayPartsToString = displayPartsToString;
+    function isLocalVariableOrFunction(symbol) {
+        if (symbol.parent) {
+            return false; // This is exported symbol
+        }
+        return ts.forEach(symbol.declarations, function (declaration) {
+            // Function expressions are local
+            if (declaration.kind === 179 /* FunctionExpression */) {
+                return true;
+            }
+            if (declaration.kind !== 218 /* VariableDeclaration */ && declaration.kind !== 220 /* FunctionDeclaration */) {
+                return false;
+            }
+            // If the parent is not sourceFile or module block it is local variable
+            for (var parent_15 = declaration.parent; !ts.isFunctionBlock(parent_15); parent_15 = parent_15.parent) {
+                // Reached source file or module block
+                if (parent_15.kind === 256 /* SourceFile */ || parent_15.kind === 226 /* ModuleBlock */) {
+                    return false;
+                }
+            }
+            // parent is in function block
+            return true;
+        });
+    }
+    function getDefaultCompilerOptions() {
+        // Always default to "ScriptTarget.ES5" for the language service
+        return {
+            target: 1 /* ES5 */,
+            jsx: 1 /* Preserve */
+        };
+    }
+    ts.getDefaultCompilerOptions = getDefaultCompilerOptions;
+    // Cache host information about scrip Should be refreshed
+    // at each language service public entry point, since we don't know when
+    // set of scripts handled by the host changes.
+    var HostCache = (function () {
+        function HostCache(host, getCanonicalFileName) {
+            this.host = host;
+            this.getCanonicalFileName = getCanonicalFileName;
+            // script id => script index
+            this.currentDirectory = host.getCurrentDirectory();
+            this.fileNameToEntry = ts.createFileMap();
+            // Initialize the list with the root file names
+            var rootFileNames = host.getScriptFileNames();
+            for (var _i = 0, rootFileNames_1 = rootFileNames; _i < rootFileNames_1.length; _i++) {
+                var fileName = rootFileNames_1[_i];
+                this.createEntry(fileName, ts.toPath(fileName, this.currentDirectory, getCanonicalFileName));
+            }
+            // store the compilation settings
+            this._compilationSettings = host.getCompilationSettings() || getDefaultCompilerOptions();
+        }
+        HostCache.prototype.compilationSettings = function () {
+            return this._compilationSettings;
+        };
+        HostCache.prototype.createEntry = function (fileName, path) {
+            var entry;
+            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
+            if (scriptSnapshot) {
+                entry = {
+                    hostFileName: fileName,
+                    version: this.host.getScriptVersion(fileName),
+                    scriptSnapshot: scriptSnapshot,
+                    scriptKind: ts.getScriptKind(fileName, this.host)
+                };
+            }
+            this.fileNameToEntry.set(path, entry);
+            return entry;
+        };
+        HostCache.prototype.getEntry = function (path) {
+            return this.fileNameToEntry.get(path);
+        };
+        HostCache.prototype.contains = function (path) {
+            return this.fileNameToEntry.contains(path);
+        };
+        HostCache.prototype.getOrCreateEntry = function (fileName) {
+            var path = ts.toPath(fileName, this.currentDirectory, this.getCanonicalFileName);
+            return this.getOrCreateEntryByPath(fileName, path);
+        };
+        HostCache.prototype.getOrCreateEntryByPath = function (fileName, path) {
+            return this.contains(path)
+                ? this.getEntry(path)
+                : this.createEntry(fileName, path);
+        };
+        HostCache.prototype.getRootFileNames = function () {
+            var fileNames = [];
+            this.fileNameToEntry.forEachValue(function (path, value) {
+                if (value) {
+                    fileNames.push(value.hostFileName);
+                }
+            });
+            return fileNames;
+        };
+        HostCache.prototype.getVersion = function (path) {
+            var file = this.getEntry(path);
+            return file && file.version;
+        };
+        HostCache.prototype.getScriptSnapshot = function (path) {
+            var file = this.getEntry(path);
+            return file && file.scriptSnapshot;
+        };
+        return HostCache;
+    }());
+    var SyntaxTreeCache = (function () {
+        function SyntaxTreeCache(host) {
+            this.host = host;
+        }
+        SyntaxTreeCache.prototype.getCurrentSourceFile = function (fileName) {
+            var scriptSnapshot = this.host.getScriptSnapshot(fileName);
+            if (!scriptSnapshot) {
+                // The host does not know about this file.
+                throw new Error("Could not find file: '" + fileName + "'.");
+            }
+            var scriptKind = ts.getScriptKind(fileName, this.host);
+            var version = this.host.getScriptVersion(fileName);
+            var sourceFile;
+            if (this.currentFileName !== fileName) {
+                // This is a new file, just parse it
+                sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, 2 /* Latest */, version, /*setNodeParents*/ true, scriptKind);
+            }
+            else if (this.currentFileVersion !== version) {
+                // This is the same file, just a newer version. Incrementally parse the file.
+                var editRange = scriptSnapshot.getChangeRange(this.currentFileScriptSnapshot);
+                sourceFile = updateLanguageServiceSourceFile(this.currentSourceFile, scriptSnapshot, version, editRange);
+            }
+            if (sourceFile) {
+                // All done, ensure state is up to date
+                this.currentFileVersion = version;
+                this.currentFileName = fileName;
+                this.currentFileScriptSnapshot = scriptSnapshot;
+                this.currentSourceFile = sourceFile;
+            }
+            return this.currentSourceFile;
+        };
+        return SyntaxTreeCache;
+    }());
+    function setSourceFileFields(sourceFile, scriptSnapshot, version) {
+        sourceFile.version = version;
+        sourceFile.scriptSnapshot = scriptSnapshot;
+    }
+    var commandLineOptions_stringToEnum;
+    /** JS users may pass in string values for enum compiler options (such as ModuleKind), so convert. */
+    function fixupCompilerOptions(options, diagnostics) {
+        // Lazily create this value to fix module loading errors.
+        commandLineOptions_stringToEnum = commandLineOptions_stringToEnum || ts.filter(ts.optionDeclarations, function (o) {
+            return typeof o.type === "object" && !ts.forEachValue(o.type, function (v) { return typeof v !== "number"; });
+        });
+        options = ts.clone(options);
+        var _loop_2 = function(opt) {
+            if (!ts.hasProperty(options, opt.name)) {
+                return "continue";
+            }
+            var value = options[opt.name];
+            // Value should be a key of opt.type
+            if (typeof value === "string") {
+                // If value is not a string, this will fail
+                options[opt.name] = ts.parseCustomTypeOption(opt, value, diagnostics);
+            }
+            else {
+                if (!ts.forEachValue(opt.type, function (v) { return v === value; })) {
+                    // Supplied value isn't a valid enum value.
+                    diagnostics.push(ts.createCompilerDiagnosticForInvalidCustomType(opt));
+                }
+            }
+        };
+        for (var _i = 0, commandLineOptions_stringToEnum_1 = commandLineOptions_stringToEnum; _i < commandLineOptions_stringToEnum_1.length; _i++) {
+            var opt = commandLineOptions_stringToEnum_1[_i];
+            _loop_2(opt);
+        }
+        return options;
+    }
+    /*
+     * This function will compile source text from 'input' argument using specified compiler options.
+     * If not options are provided - it will use a set of default compiler options.
+     * Extra compiler options that will unconditionally be used by this function are:
+     * - isolatedModules = true
+     * - allowNonTsExtensions = true
+     * - noLib = true
+     * - noResolve = true
+     */
+    function transpileModule(input, transpileOptions) {
+        var diagnostics = [];
+        var options = transpileOptions.compilerOptions ? fixupCompilerOptions(transpileOptions.compilerOptions, diagnostics) : getDefaultCompilerOptions();
+        options.isolatedModules = true;
+        // transpileModule does not write anything to disk so there is no need to verify that there are no conflicts between input and output paths.
+        options.suppressOutputPathCheck = true;
+        // Filename can be non-ts file.
+        options.allowNonTsExtensions = true;
+        // We are not returning a sourceFile for lib file when asked by the program,
+        // so pass --noLib to avoid reporting a file not found error.
+        options.noLib = true;
+        // We are not doing a full typecheck, we are not resolving the whole context,
+        // so pass --noResolve to avoid reporting missing file errors.
+        options.noResolve = true;
+        // if jsx is specified then treat file as .tsx
+        var inputFileName = transpileOptions.fileName || (options.jsx ? "module.tsx" : "module.ts");
+        var sourceFile = ts.createSourceFile(inputFileName, input, options.target);
+        if (transpileOptions.moduleName) {
+            sourceFile.moduleName = transpileOptions.moduleName;
+        }
+        sourceFile.renamedDependencies = transpileOptions.renamedDependencies;
+        var newLine = ts.getNewLineCharacter(options);
+        // Output
+        var outputText;
+        var sourceMapText;
+        // Create a compilerHost object to allow the compiler to read and write files
+        var compilerHost = {
+            getSourceFile: function (fileName, target) { return fileName === ts.normalizePath(inputFileName) ? sourceFile : undefined; },
+            writeFile: function (name, text, writeByteOrderMark) {
+                if (ts.fileExtensionIs(name, ".map")) {
+                    ts.Debug.assert(sourceMapText === undefined, "Unexpected multiple source map outputs for the file '" + name + "'");
+                    sourceMapText = text;
+                }
+                else {
+                    ts.Debug.assert(outputText === undefined, "Unexpected multiple outputs for the file: '" + name + "'");
+                    outputText = text;
+                }
+            },
+            getDefaultLibFileName: function () { return "lib.d.ts"; },
+            useCaseSensitiveFileNames: function () { return false; },
+            getCanonicalFileName: function (fileName) { return fileName; },
+            getCurrentDirectory: function () { return ""; },
+            getNewLine: function () { return newLine; },
+            fileExists: function (fileName) { return fileName === inputFileName; },
+            readFile: function (fileName) { return ""; },
+            directoryExists: function (directoryExists) { return true; }
+        };
+        var program = ts.createProgram([inputFileName], options, compilerHost);
+        if (transpileOptions.reportDiagnostics) {
+            ts.addRange(/*to*/ diagnostics, /*from*/ program.getSyntacticDiagnostics(sourceFile));
+            ts.addRange(/*to*/ diagnostics, /*from*/ program.getOptionsDiagnostics());
+        }
+        // Emit
+        program.emit();
+        ts.Debug.assert(outputText !== undefined, "Output generation failed");
+        return { outputText: outputText, diagnostics: diagnostics, sourceMapText: sourceMapText };
+    }
+    ts.transpileModule = transpileModule;
+    /*
+     * This is a shortcut function for transpileModule - it accepts transpileOptions as parameters and returns only outputText part of the result.
+     */
+    function transpile(input, compilerOptions, fileName, diagnostics, moduleName) {
+        var output = transpileModule(input, { compilerOptions: compilerOptions, fileName: fileName, reportDiagnostics: !!diagnostics, moduleName: moduleName });
+        // addRange correctly handles cases when wither 'from' or 'to' argument is missing
+        ts.addRange(diagnostics, output.diagnostics);
+        return output.outputText;
+    }
+    ts.transpile = transpile;
+    function createLanguageServiceSourceFile(fileName, scriptSnapshot, scriptTarget, version, setNodeParents, scriptKind) {
+        var text = scriptSnapshot.getText(0, scriptSnapshot.getLength());
+        var sourceFile = ts.createSourceFile(fileName, text, scriptTarget, setNodeParents, scriptKind);
+        setSourceFileFields(sourceFile, scriptSnapshot, version);
+        return sourceFile;
+    }
+    ts.createLanguageServiceSourceFile = createLanguageServiceSourceFile;
+    ts.disableIncrementalParsing = false;
+    function updateLanguageServiceSourceFile(sourceFile, scriptSnapshot, version, textChangeRange, aggressiveChecks) {
+        // If we were given a text change range, and our version or open-ness changed, then
+        // incrementally parse this file.
+        if (textChangeRange) {
+            if (version !== sourceFile.version) {
+                // Once incremental parsing is ready, then just call into this function.
+                if (!ts.disableIncrementalParsing) {
+                    var newText = void 0;
+                    // grab the fragment from the beginning of the original text to the beginning of the span
+                    var prefix = textChangeRange.span.start !== 0
+                        ? sourceFile.text.substr(0, textChangeRange.span.start)
+                        : "";
+                    // grab the fragment from the end of the span till the end of the original text
+                    var suffix = ts.textSpanEnd(textChangeRange.span) !== sourceFile.text.length
+                        ? sourceFile.text.substr(ts.textSpanEnd(textChangeRange.span))
+                        : "";
+                    if (textChangeRange.newLength === 0) {
+                        // edit was a deletion - just combine prefix and suffix
+                        newText = prefix && suffix ? prefix + suffix : prefix || suffix;
+                    }
+                    else {
+                        // it was actual edit, fetch the fragment of new text that correspond to new span
+                        var changedText = scriptSnapshot.getText(textChangeRange.span.start, textChangeRange.span.start + textChangeRange.newLength);
+                        // combine prefix, changed text and suffix
+                        newText = prefix && suffix
+                            ? prefix + changedText + suffix
+                            : prefix
+                                ? (prefix + changedText)
+                                : (changedText + suffix);
+                    }
+                    var newSourceFile = ts.updateSourceFile(sourceFile, newText, textChangeRange, aggressiveChecks);
+                    setSourceFileFields(newSourceFile, scriptSnapshot, version);
+                    // after incremental parsing nameTable might not be up-to-date
+                    // drop it so it can be lazily recreated later
+                    newSourceFile.nameTable = undefined;
+                    // dispose all resources held by old script snapshot
+                    if (sourceFile !== newSourceFile && sourceFile.scriptSnapshot) {
+                        if (sourceFile.scriptSnapshot.dispose) {
+                            sourceFile.scriptSnapshot.dispose();
+                        }
+                        sourceFile.scriptSnapshot = undefined;
+                    }
+                    return newSourceFile;
+                }
+            }
+        }
+        // Otherwise, just create a new source file.
+        return createLanguageServiceSourceFile(sourceFile.fileName, scriptSnapshot, sourceFile.languageVersion, version, /*setNodeParents*/ true, sourceFile.scriptKind);
+    }
+    ts.updateLanguageServiceSourceFile = updateLanguageServiceSourceFile;
+    function createDocumentRegistry(useCaseSensitiveFileNames, currentDirectory) {
+        if (currentDirectory === void 0) { currentDirectory = ""; }
+        // Maps from compiler setting target (ES3, ES5, etc.) to all the cached documents we have
+        // for those settings.
+        var buckets = {};
+        var getCanonicalFileName = ts.createGetCanonicalFileName(!!useCaseSensitiveFileNames);
+        function getKeyForCompilationSettings(settings) {
+            return ("_" + settings.target + "|" + settings.module + "|" + settings.noResolve + "|" + settings.jsx + "|" + settings.allowJs + "|" + settings.baseUrl + "|" + settings.typesRoot + "|" + settings.typesSearchPaths + "|" + JSON.stringify(settings.rootDirs) + "|" + JSON.stringify(settings.paths));
+        }
+        function getBucketForCompilationSettings(key, createIfMissing) {
+            var bucket = ts.lookUp(buckets, key);
+            if (!bucket && createIfMissing) {
+                buckets[key] = bucket = ts.createFileMap();
+            }
+            return bucket;
+        }
+        function reportStats() {
+            var bucketInfoArray = Object.keys(buckets).filter(function (name) { return name && name.charAt(0) === "_"; }).map(function (name) {
+                var entries = ts.lookUp(buckets, name);
+                var sourceFiles = [];
+                entries.forEachValue(function (key, entry) {
+                    sourceFiles.push({
+                        name: key,
+                        refCount: entry.languageServiceRefCount,
+                        references: entry.owners.slice(0)
+                    });
+                });
+                sourceFiles.sort(function (x, y) { return y.refCount - x.refCount; });
+                return {
+                    bucket: name,
+                    sourceFiles: sourceFiles
+                };
+            });
+            return JSON.stringify(bucketInfoArray, undefined, 2);
+        }
+        function acquireDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        }
+        function acquireDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
+            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ true, scriptKind);
+        }
+        function updateDocument(fileName, compilationSettings, scriptSnapshot, version, scriptKind) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind);
+        }
+        function updateDocumentWithKey(fileName, path, compilationSettings, key, scriptSnapshot, version, scriptKind) {
+            return acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, /*acquiring*/ false, scriptKind);
+        }
+        function acquireOrUpdateDocument(fileName, path, compilationSettings, key, scriptSnapshot, version, acquiring, scriptKind) {
+            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ true);
+            var entry = bucket.get(path);
+            if (!entry) {
+                ts.Debug.assert(acquiring, "How could we be trying to update a document that the registry doesn't have?");
+                // Have never seen this file with these settings.  Create a new source file for it.
+                var sourceFile = createLanguageServiceSourceFile(fileName, scriptSnapshot, compilationSettings.target, version, /*setNodeParents*/ false, scriptKind);
+                entry = {
+                    sourceFile: sourceFile,
+                    languageServiceRefCount: 0,
+                    owners: []
+                };
+                bucket.set(path, entry);
+            }
+            else {
+                // We have an entry for this file.  However, it may be for a different version of
+                // the script snapshot.  If so, update it appropriately.  Otherwise, we can just
+                // return it as is.
+                if (entry.sourceFile.version !== version) {
+                    entry.sourceFile = updateLanguageServiceSourceFile(entry.sourceFile, scriptSnapshot, version, scriptSnapshot.getChangeRange(entry.sourceFile.scriptSnapshot));
+                }
+            }
+            // If we're acquiring, then this is the first time this LS is asking for this document.
+            // Increase our ref count so we know there's another LS using the document.  If we're
+            // not acquiring, then that means the LS is 'updating' the file instead, and that means
+            // it has already acquired the document previously.  As such, we do not need to increase
+            // the ref count.
+            if (acquiring) {
+                entry.languageServiceRefCount++;
+            }
+            return entry.sourceFile;
+        }
+        function releaseDocument(fileName, compilationSettings) {
+            var path = ts.toPath(fileName, currentDirectory, getCanonicalFileName);
+            var key = getKeyForCompilationSettings(compilationSettings);
+            return releaseDocumentWithKey(path, key);
+        }
+        function releaseDocumentWithKey(path, key) {
+            var bucket = getBucketForCompilationSettings(key, /*createIfMissing*/ false);
+            ts.Debug.assert(bucket !== undefined);
+            var entry = bucket.get(path);
+            entry.languageServiceRefCount--;
+            ts.Debug.assert(entry.languageServiceRefCount >= 0);
+            if (entry.languageServiceRefCount === 0) {
+                bucket.remove(path);
+            }
+        }
+        return {
+            acquireDocument: acquireDocument,
+            acquireDocumentWithKey: acquireDocumentWithKey,
+            updateDocument: updateDocument,
+            updateDocumentWithKey: updateDocumentWithKey,
+            releaseDocument: releaseDocument,
+            releaseDocumentWithKey: releaseDocumentWithKey,
+            reportStats: reportStats,
+            getKeyForCompilationSettings: getKeyForCompilationSettings
+        };
+    }
+    ts.createDocumentRegistry = createDocumentRegistry;
+    function preProcessFile(sourceText, readImportFiles, detectJavaScriptImports) {
+        if (readImportFiles === void 0) { readImportFiles = true; }
+        if (detectJavaScriptImports === void 0) { detectJavaScriptImports = false; }
+        var referencedFiles = [];
+        var typeReferenceDirectives = [];
+        var importedFiles = [];
+        var ambientExternalModules;
+        var isNoDefaultLib = false;
+        var braceNesting = 0;
+        // assume that text represent an external module if it contains at least one top level import/export
+        // ambient modules that are found inside external modules are interpreted as module augmentations
+        var externalModule = false;
+        function nextToken() {
+            var token = scanner.scan();
+            if (token === 15 /* OpenBraceToken */) {
+                braceNesting++;
+            }
+            else if (token === 16 /* CloseBraceToken */) {
+                braceNesting--;
+            }
+            return token;
+        }
+        function processTripleSlashDirectives() {
+            var commentRanges = ts.getLeadingCommentRanges(sourceText, 0);
+            ts.forEach(commentRanges, function (commentRange) {
+                var comment = sourceText.substring(commentRange.pos, commentRange.end);
+                var referencePathMatchResult = ts.getFileReferenceFromReferencePath(comment, commentRange);
+                if (referencePathMatchResult) {
+                    isNoDefaultLib = referencePathMatchResult.isNoDefaultLib;
+                    var fileReference = referencePathMatchResult.fileReference;
+                    if (fileReference) {
+                        var collection = referencePathMatchResult.isTypeReferenceDirective
+                            ? typeReferenceDirectives
+                            : referencedFiles;
+                        collection.push(fileReference);
+                    }
+                }
+            });
+        }
+        function getFileReference() {
+            var file = scanner.getTokenValue();
+            var pos = scanner.getTokenPos();
+            return {
+                fileName: file,
+                pos: pos,
+                end: pos + file.length
+            };
+        }
+        function recordAmbientExternalModule() {
+            if (!ambientExternalModules) {
+                ambientExternalModules = [];
+            }
+            ambientExternalModules.push({ ref: getFileReference(), depth: braceNesting });
+        }
+        function recordModuleName() {
+            importedFiles.push(getFileReference());
+            markAsExternalModuleIfTopLevel();
+        }
+        function markAsExternalModuleIfTopLevel() {
+            if (braceNesting === 0) {
+                externalModule = true;
+            }
+        }
+        /**
+         * Returns true if at least one token was consumed from the stream
+         */
+        function tryConsumeDeclare() {
+            var token = scanner.getToken();
+            if (token === 122 /* DeclareKeyword */) {
+                // declare module "mod"
+                token = nextToken();
+                if (token === 125 /* ModuleKeyword */) {
+                    token = nextToken();
+                    if (token === 9 /* StringLiteral */) {
+                        recordAmbientExternalModule();
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        /**
+         * Returns true if at least one token was consumed from the stream
+         */
+        function tryConsumeImport() {
+            var token = scanner.getToken();
+            if (token === 89 /* ImportKeyword */) {
+                token = nextToken();
+                if (token === 9 /* StringLiteral */) {
+                    // import "mod";
+                    recordModuleName();
+                    return true;
+                }
+                else {
+                    if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
+                        token = nextToken();
+                        if (token === 136 /* FromKeyword */) {
+                            token = nextToken();
+                            if (token === 9 /* StringLiteral */) {
+                                // import d from "mod";
+                                recordModuleName();
+                                return true;
+                            }
+                        }
+                        else if (token === 56 /* EqualsToken */) {
+                            if (tryConsumeRequireCall(/*skipCurrentToken*/ true)) {
+                                return true;
+                            }
+                        }
+                        else if (token === 24 /* CommaToken */) {
+                            // consume comma and keep going
+                            token = nextToken();
+                        }
+                        else {
+                            // unknown syntax
+                            return true;
+                        }
+                    }
+                    if (token === 15 /* OpenBraceToken */) {
+                        token = nextToken();
+                        // consume "{ a as B, c, d as D}" clauses
+                        // make sure that it stops on EOF
+                        while (token !== 16 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
+                            token = nextToken();
+                        }
+                        if (token === 16 /* CloseBraceToken */) {
+                            token = nextToken();
+                            if (token === 136 /* FromKeyword */) {
+                                token = nextToken();
+                                if (token === 9 /* StringLiteral */) {
+                                    // import {a as A} from "mod";
+                                    // import d, {a, b as B} from "mod"
+                                    recordModuleName();
+                                }
+                            }
+                        }
+                    }
+                    else if (token === 37 /* AsteriskToken */) {
+                        token = nextToken();
+                        if (token === 116 /* AsKeyword */) {
+                            token = nextToken();
+                            if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
+                                token = nextToken();
+                                if (token === 136 /* FromKeyword */) {
+                                    token = nextToken();
+                                    if (token === 9 /* StringLiteral */) {
+                                        // import * as NS from "mod"
+                                        // import d, * as NS from "mod"
+                                        recordModuleName();
+                                    }
+                                }
+                            }
+                        }
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeExport() {
+            var token = scanner.getToken();
+            if (token === 82 /* ExportKeyword */) {
+                markAsExternalModuleIfTopLevel();
+                token = nextToken();
+                if (token === 15 /* OpenBraceToken */) {
+                    token = nextToken();
+                    // consume "{ a as B, c, d as D}" clauses
+                    // make sure it stops on EOF
+                    while (token !== 16 /* CloseBraceToken */ && token !== 1 /* EndOfFileToken */) {
+                        token = nextToken();
+                    }
+                    if (token === 16 /* CloseBraceToken */) {
+                        token = nextToken();
+                        if (token === 136 /* FromKeyword */) {
+                            token = nextToken();
+                            if (token === 9 /* StringLiteral */) {
+                                // export {a as A} from "mod";
+                                // export {a, b as B} from "mod"
+                                recordModuleName();
+                            }
+                        }
+                    }
+                }
+                else if (token === 37 /* AsteriskToken */) {
+                    token = nextToken();
+                    if (token === 136 /* FromKeyword */) {
+                        token = nextToken();
+                        if (token === 9 /* StringLiteral */) {
+                            // export * from "mod"
+                            recordModuleName();
+                        }
+                    }
+                }
+                else if (token === 89 /* ImportKeyword */) {
+                    token = nextToken();
+                    if (token === 69 /* Identifier */ || ts.isKeyword(token)) {
+                        token = nextToken();
+                        if (token === 56 /* EqualsToken */) {
+                            if (tryConsumeRequireCall(/*skipCurrentToken*/ true)) {
+                                return true;
+                            }
+                        }
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeRequireCall(skipCurrentToken) {
+            var token = skipCurrentToken ? nextToken() : scanner.getToken();
+            if (token === 129 /* RequireKeyword */) {
+                token = nextToken();
+                if (token === 17 /* OpenParenToken */) {
+                    token = nextToken();
+                    if (token === 9 /* StringLiteral */) {
+                        //  require("mod");
+                        recordModuleName();
+                    }
+                }
+                return true;
+            }
+            return false;
+        }
+        function tryConsumeDefine() {
+            var token = scanner.getToken();
+            if (token === 69 /* Identifier */ && scanner.getTokenValue() === "define") {
+                token = nextToken();
+                if (token !== 17 /* OpenParenToken */) {
+                    return true;
+                }
+                token = nextToken();
+                if (token === 9 /* StringLiteral */) {
+                    // looks like define ("modname", ... - skip string literal and comma
+                    token = nextToken();
+                    if (token === 24 /* CommaToken */) {
+                        token = nextToken();
+                    }
+                    else {
+                        // unexpected token
+                        return true;
+                    }
+                }
+                // should be start of dependency list
+                if (token !== 19 /* OpenBracketToken */) {
+                    return true;
+                }
+                // skip open bracket
+                token = nextToken();
+                var i = 0;
+                // scan until ']' or EOF
+                while (token !== 20 /* CloseBracketToken */ && token !== 1 /* EndOfFileToken */) {
+                    // record string literals as module names
+                    if (token === 9 /* StringLiteral */) {
+                        recordModuleName();
+                        i++;
+                    }
+                    token = nextToken();
+                }
+                return true;
+            }
+            return false;
+        }
+        function processImports() {
+            scanner.setText(sourceText);
+            nextToken();
+            // Look for:
+            //    import "mod";
+            //    import d from "mod"
+            //    import {a as A } from "mod";
+            //    import * as NS  from "mod"
+            //    import d, {a, b as B} from "mod"
+            //    import i = require("mod");
+            //
+            //    export * from "mod"
+            //    export {a as b} from "mod"
+            //    export import i = require("mod")
+            //    (for JavaScript files) require("mod")
+            while (true) {
+                if (scanner.getToken() === 1 /* EndOfFileToken */) {
+                    break;
+                }
+                // check if at least one of alternative have moved scanner forward
+                if (tryConsumeDeclare() ||
+                    tryConsumeImport() ||
+                    tryConsumeExport() ||
+                    (detectJavaScriptImports && (tryConsumeRequireCall(/*skipCurrentToken*/ false) || tryConsumeDefine()))) {
+                    continue;
+                }
+                else {
+                    nextToken();
+                }
+            }
+            scanner.setText(undefined);
+        }
+        if (readImportFiles) {
+            processImports();
+        }
+        processTripleSlashDirectives();
+        if (externalModule) {
+            // for external modules module all nested ambient modules are augmentations
+            if (ambientExternalModules) {
+                // move all detected ambient modules to imported files since they need to be resolved
+                for (var _i = 0, ambientExternalModules_1 = ambientExternalModules; _i < ambientExternalModules_1.length; _i++) {
+                    var decl = ambientExternalModules_1[_i];
+                    importedFiles.push(decl.ref);
+                }
+            }
+            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: undefined };
+        }
+        else {
+            // for global scripts ambient modules still can have augmentations - look for ambient modules with depth > 0
+            var ambientModuleNames = void 0;
+            if (ambientExternalModules) {
+                for (var _a = 0, ambientExternalModules_2 = ambientExternalModules; _a < ambientExternalModules_2.length; _a++) {
+                    var decl = ambientExternalModules_2[_a];
+                    if (decl.depth === 0) {
+                        if (!ambientModuleNames) {
+                            ambientModuleNames = [];
+                        }
+                        ambientModuleNames.push(decl.ref.fileName);
+                    }
+                    else {
+                        importedFiles.push(decl.ref);
+                    }
+                }
+            }
+            return { referencedFiles: referencedFiles, typeReferenceDirectives: typeReferenceDirectives, importedFiles: importedFiles, isLibFile: isNoDefaultLib, ambientExternalModules: ambientModuleNames };
+        }
+    }
+    ts.preProcessFile = preProcessFile;
+    /// Helpers
+    function getTargetLabel(referenceNode, labelName) {
+        while (referenceNode) {
+            if (referenceNode.kind === 214 /* LabeledStatement */ && referenceNode.label.text === labelName) {
+                return referenceNode.label;
+            }
+            referenceNode = referenceNode.parent;
+        }
+        return undefined;
+    }
+    function isJumpStatementTarget(node) {
+        return node.kind === 69 /* Identifier */ &&
+            (node.parent.kind === 210 /* BreakStatement */ || node.parent.kind === 209 /* ContinueStatement */) &&
+            node.parent.label === node;
+    }
+    function isLabelOfLabeledStatement(node) {
+        return node.kind === 69 /* Identifier */ &&
+            node.parent.kind === 214 /* LabeledStatement */ &&
+            node.parent.label === node;
+    }
+    /**
+     * Whether or not a 'node' is preceded by a label of the given string.
+     * Note: 'node' cannot be a SourceFile.
+     */
+    function isLabeledBy(node, labelName) {
+        for (var owner = node.parent; owner.kind === 214 /* LabeledStatement */; owner = owner.parent) {
+            if (owner.label.text === labelName) {
+                return true;
+            }
+        }
+        return false;
+    }
+    function isLabelName(node) {
+        return isLabelOfLabeledStatement(node) || isJumpStatementTarget(node);
+    }
+    function isRightSideOfQualifiedName(node) {
+        return node.parent.kind === 139 /* QualifiedName */ && node.parent.right === node;
+    }
+    function isRightSideOfPropertyAccess(node) {
+        return node && node.parent && node.parent.kind === 172 /* PropertyAccessExpression */ && node.parent.name === node;
+    }
+    function isCallExpressionTarget(node) {
+        if (isRightSideOfPropertyAccess(node)) {
+            node = node.parent;
+        }
+        return node && node.parent && node.parent.kind === 174 /* CallExpression */ && node.parent.expression === node;
+    }
+    function isNewExpressionTarget(node) {
+        if (isRightSideOfPropertyAccess(node)) {
+            node = node.parent;
+        }
+        return node && node.parent && node.parent.kind === 175 /* NewExpression */ && node.parent.expression === node;
+    }
+    function isNameOfModuleDeclaration(node) {
+        return node.parent.kind === 225 /* ModuleDeclaration */ && node.parent.name === node;
+    }
+    function isNameOfFunctionDeclaration(node) {
+        return node.kind === 69 /* Identifier */ &&
+            ts.isFunctionLike(node.parent) && node.parent.name === node;
+    }
+    function isObjectLiteralPropertyDeclaration(node) {
+        switch (node.kind) {
+            case 253 /* PropertyAssignment */:
+            case 254 /* ShorthandPropertyAssignment */:
+            case 147 /* MethodDeclaration */:
+            case 149 /* GetAccessor */:
+            case 150 /* SetAccessor */:
+                return true;
+        }
+        return false;
+    }
+    /**
+     * Returns the containing object literal property declaration given a possible name node, e.g. "a" in x = { "a": 1 }
+     */
+    function getContainingObjectLiteralElement(node) {
+        switch (node.kind) {
+            case 9 /* StringLiteral */:
+            case 8 /* NumericLiteral */:
+                if (node.parent.kind === 140 /* ComputedPropertyName */) {
+                    return isObjectLiteralPropertyDeclaration(node.parent.parent) ? node.parent.parent : undefined;
+                }
+            // intential fall through
+            case 69 /* Identifier */:
+                return isObjectLiteralPropertyDeclaration(node.parent) && node.parent.name === node ? node.parent : undefined;
+        }
+        return undefined;
+    }
+    function isLiteralNameOfPropertyDeclarationOrIndexAccess(node) {
+        if (node.kind === 9 /* StringLiteral */ || node.kind === 8 /* NumericLiteral */) {
+            switch (node.parent.kind) {
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 253 /* PropertyAssignment */:
+                case 255 /* EnumMember */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 225 /* ModuleDeclaration */:
+                    return node.parent.name === node;
+                case 173 /* ElementAccessExpression */:
+                    return node.parent.argumentExpression === node;
+                case 140 /* ComputedPropertyName */:
+                    return true;
+            }
+        }
+        return false;
+    }
+    function isNameOfExternalModuleImportOrDeclaration(node) {
+        if (node.kind === 9 /* StringLiteral */) {
+            return isNameOfModuleDeclaration(node) ||
+                (ts.isExternalModuleImportEqualsDeclaration(node.parent.parent) && ts.getExternalModuleImportEqualsDeclarationExpression(node.parent.parent) === node);
+        }
+        return false;
+    }
+    /** Returns true if the position is within a comment */
+    function isInsideComment(sourceFile, token, position) {
+        // The position has to be: 1. in the leading trivia (before token.getStart()), and 2. within a comment
+        return position <= token.getStart(sourceFile) &&
+            (isInsideCommentRange(ts.getTrailingCommentRanges(sourceFile.text, token.getFullStart())) ||
+                isInsideCommentRange(ts.getLeadingCommentRanges(sourceFile.text, token.getFullStart())));
+        function isInsideCommentRange(comments) {
+            return ts.forEach(comments, function (comment) {
+                // either we are 1. completely inside the comment, or 2. at the end of the comment
+                if (comment.pos < position && position < comment.end) {
+                    return true;
+                }
+                else if (position === comment.end) {
+                    var text = sourceFile.text;
+                    var width = comment.end - comment.pos;
+                    // is single line comment or just /*
+                    if (width <= 2 || text.charCodeAt(comment.pos + 1) === 47 /* slash */) {
+                        return true;
+                    }
+                    else {
+                        // is unterminated multi-line comment
+                        return !(text.charCodeAt(comment.end - 1) === 47 /* slash */ &&
+                            text.charCodeAt(comment.end - 2) === 42 /* asterisk */);
+                    }
+                }
+                return false;
+            });
+        }
+    }
+    var SemanticMeaning;
+    (function (SemanticMeaning) {
+        SemanticMeaning[SemanticMeaning["None"] = 0] = "None";
+        SemanticMeaning[SemanticMeaning["Value"] = 1] = "Value";
+        SemanticMeaning[SemanticMeaning["Type"] = 2] = "Type";
+        SemanticMeaning[SemanticMeaning["Namespace"] = 4] = "Namespace";
+        SemanticMeaning[SemanticMeaning["All"] = 7] = "All";
+    })(SemanticMeaning || (SemanticMeaning = {}));
+    var BreakContinueSearchType;
+    (function (BreakContinueSearchType) {
+        BreakContinueSearchType[BreakContinueSearchType["None"] = 0] = "None";
+        BreakContinueSearchType[BreakContinueSearchType["Unlabeled"] = 1] = "Unlabeled";
+        BreakContinueSearchType[BreakContinueSearchType["Labeled"] = 2] = "Labeled";
+        BreakContinueSearchType[BreakContinueSearchType["All"] = 3] = "All";
+    })(BreakContinueSearchType || (BreakContinueSearchType = {}));
+    // A cache of completion entries for keywords, these do not change between sessions
+    var keywordCompletions = [];
+    for (var i = 70 /* FirstKeyword */; i <= 138 /* LastKeyword */; i++) {
+        keywordCompletions.push({
+            name: ts.tokenToString(i),
+            kind: ScriptElementKind.keyword,
+            kindModifiers: ScriptElementKindModifier.none,
+            sortText: "0"
+        });
+    }
+    /* @internal */ function getContainerNode(node) {
+        while (true) {
+            node = node.parent;
+            if (!node) {
+                return undefined;
+            }
+            switch (node.kind) {
+                case 256 /* SourceFile */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 221 /* ClassDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 224 /* EnumDeclaration */:
+                case 225 /* ModuleDeclaration */:
+                    return node;
+            }
+        }
+    }
+    ts.getContainerNode = getContainerNode;
+    /* @internal */ function getNodeKind(node) {
+        switch (node.kind) {
+            case 225 /* ModuleDeclaration */: return ScriptElementKind.moduleElement;
+            case 221 /* ClassDeclaration */:
+            case 192 /* ClassExpression */:
+                return ScriptElementKind.classElement;
+            case 222 /* InterfaceDeclaration */: return ScriptElementKind.interfaceElement;
+            case 223 /* TypeAliasDeclaration */: return ScriptElementKind.typeElement;
+            case 224 /* EnumDeclaration */: return ScriptElementKind.enumElement;
+            case 218 /* VariableDeclaration */:
+                return ts.isConst(node)
+                    ? ScriptElementKind.constElement
+                    : ts.isLet(node)
+                        ? ScriptElementKind.letElement
+                        : ScriptElementKind.variableElement;
+            case 220 /* FunctionDeclaration */:
+            case 179 /* FunctionExpression */:
+                return ScriptElementKind.functionElement;
+            case 149 /* GetAccessor */: return ScriptElementKind.memberGetAccessorElement;
+            case 150 /* SetAccessor */: return ScriptElementKind.memberSetAccessorElement;
+            case 147 /* MethodDeclaration */:
+            case 146 /* MethodSignature */:
+                return ScriptElementKind.memberFunctionElement;
+            case 145 /* PropertyDeclaration */:
+            case 144 /* PropertySignature */:
+                return ScriptElementKind.memberVariableElement;
+            case 153 /* IndexSignature */: return ScriptElementKind.indexSignatureElement;
+            case 152 /* ConstructSignature */: return ScriptElementKind.constructSignatureElement;
+            case 151 /* CallSignature */: return ScriptElementKind.callSignatureElement;
+            case 148 /* Constructor */: return ScriptElementKind.constructorImplementationElement;
+            case 141 /* TypeParameter */: return ScriptElementKind.typeParameterElement;
+            case 255 /* EnumMember */: return ScriptElementKind.variableElement;
+            case 142 /* Parameter */: return (node.flags & 92 /* ParameterPropertyModifier */) ? ScriptElementKind.memberVariableElement : ScriptElementKind.parameterElement;
+            case 229 /* ImportEqualsDeclaration */:
+            case 234 /* ImportSpecifier */:
+            case 231 /* ImportClause */:
+            case 238 /* ExportSpecifier */:
+            case 232 /* NamespaceImport */:
+                return ScriptElementKind.alias;
+        }
+        return ScriptElementKind.unknown;
+    }
+    ts.getNodeKind = getNodeKind;
+    var CancellationTokenObject = (function () {
+        function CancellationTokenObject(cancellationToken) {
+            this.cancellationToken = cancellationToken;
+        }
+        CancellationTokenObject.prototype.isCancellationRequested = function () {
+            return this.cancellationToken && this.cancellationToken.isCancellationRequested();
+        };
+        CancellationTokenObject.prototype.throwIfCancellationRequested = function () {
+            if (this.isCancellationRequested()) {
+                throw new ts.OperationCanceledException();
+            }
+        };
+        return CancellationTokenObject;
+    }());
+    function createLanguageService(host, documentRegistry) {
+        if (documentRegistry === void 0) { documentRegistry = createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory()); }
+        var syntaxTreeCache = new SyntaxTreeCache(host);
+        var ruleProvider;
+        var program;
+        var lastProjectVersion;
+        var useCaseSensitivefileNames = false;
+        var cancellationToken = new CancellationTokenObject(host.getCancellationToken && host.getCancellationToken());
+        var currentDirectory = host.getCurrentDirectory();
+        // Check if the localized messages json is set, otherwise query the host for it
+        if (!ts.localizedDiagnosticMessages && host.getLocalizedDiagnosticMessages) {
+            ts.localizedDiagnosticMessages = host.getLocalizedDiagnosticMessages();
+        }
+        function log(message) {
+            if (host.log) {
+                host.log(message);
+            }
+        }
+        var getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitivefileNames);
+        function getValidSourceFile(fileName) {
+            var sourceFile = program.getSourceFile(fileName);
+            if (!sourceFile) {
+                throw new Error("Could not find file: '" + fileName + "'.");
+            }
+            return sourceFile;
+        }
+        function getRuleProvider(options) {
+            // Ensure rules are initialized and up to date wrt to formatting options
+            if (!ruleProvider) {
+                ruleProvider = new ts.formatting.RulesProvider();
+            }
+            ruleProvider.ensureUpToDate(options);
+            return ruleProvider;
+        }
+        function synchronizeHostData() {
+            // perform fast check if host supports it
+            if (host.getProjectVersion) {
+                var hostProjectVersion = host.getProjectVersion();
+                if (hostProjectVersion) {
+                    if (lastProjectVersion === hostProjectVersion) {
+                        return;
+                    }
+                    lastProjectVersion = hostProjectVersion;
+                }
+            }
+            // Get a fresh cache of the host information
+            var hostCache = new HostCache(host, getCanonicalFileName);
+            // If the program is already up-to-date, we can reuse it
+            if (programUpToDate()) {
+                return;
+            }
+            // IMPORTANT - It is critical from this moment onward that we do not check
+            // cancellation tokens.  We are about to mutate source files from a previous program
+            // instance.  If we cancel midway through, we may end up in an inconsistent state where
+            // the program points to old source files that have been invalidated because of
+            // incremental parsing.
+            var oldSettings = program && program.getCompilerOptions();
+            var newSettings = hostCache.compilationSettings();
+            var changesInCompilationSettingsAffectSyntax = oldSettings &&
+                (oldSettings.target !== newSettings.target ||
+                    oldSettings.module !== newSettings.module ||
+                    oldSettings.moduleResolution !== newSettings.moduleResolution ||
+                    oldSettings.noResolve !== newSettings.noResolve ||
+                    oldSettings.jsx !== newSettings.jsx ||
+                    oldSettings.allowJs !== newSettings.allowJs);
+            // Now create a new compiler
+            var compilerHost = {
+                getSourceFile: getOrCreateSourceFile,
+                getSourceFileByPath: getOrCreateSourceFileByPath,
+                getCancellationToken: function () { return cancellationToken; },
+                getCanonicalFileName: getCanonicalFileName,
+                useCaseSensitiveFileNames: function () { return useCaseSensitivefileNames; },
+                getNewLine: function () { return ts.getNewLineOrDefaultFromHost(host); },
+                getDefaultLibFileName: function (options) { return host.getDefaultLibFileName(options); },
+                writeFile: function (fileName, data, writeByteOrderMark) { },
+                getCurrentDirectory: function () { return currentDirectory; },
+                fileExists: function (fileName) {
+                    // stub missing host functionality
+                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
+                    return hostCache.getOrCreateEntry(fileName) !== undefined;
+                },
+                readFile: function (fileName) {
+                    // stub missing host functionality
+                    var entry = hostCache.getOrCreateEntry(fileName);
+                    return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
+                },
+                directoryExists: function (directoryName) {
+                    ts.Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
+                    return ts.directoryProbablyExists(directoryName, host);
+                }
+            };
+            if (host.trace) {
+                compilerHost.trace = function (message) { return host.trace(message); };
+            }
+            if (host.resolveModuleNames) {
+                compilerHost.resolveModuleNames = function (moduleNames, containingFile) { return host.resolveModuleNames(moduleNames, containingFile); };
+            }
+            if (host.resolveTypeReferenceDirectives) {
+                compilerHost.resolveTypeReferenceDirectives = function (typeReferenceDirectiveNames, containingFile) {
+                    return host.resolveTypeReferenceDirectives(typeReferenceDirectiveNames, containingFile);
+                };
+            }
+            var documentRegistryBucketKey = documentRegistry.getKeyForCompilationSettings(newSettings);
+            var newProgram = ts.createProgram(hostCache.getRootFileNames(), newSettings, compilerHost, program);
+            // Release any files we have acquired in the old program but are
+            // not part of the new program.
+            if (program) {
+                var oldSourceFiles = program.getSourceFiles();
+                var oldSettingsKey = documentRegistry.getKeyForCompilationSettings(oldSettings);
+                for (var _i = 0, oldSourceFiles_1 = oldSourceFiles; _i < oldSourceFiles_1.length; _i++) {
+                    var oldSourceFile = oldSourceFiles_1[_i];
+                    if (!newProgram.getSourceFile(oldSourceFile.fileName) || changesInCompilationSettingsAffectSyntax) {
+                        documentRegistry.releaseDocumentWithKey(oldSourceFile.path, oldSettingsKey);
+                    }
+                }
+            }
+            // hostCache is captured in the closure for 'getOrCreateSourceFile' but it should not be used past this point.
+            // It needs to be cleared to allow all collected snapshots to be released
+            hostCache = undefined;
+            program = newProgram;
+            // Make sure all the nodes in the program are both bound, and have their parent
+            // pointers set property.
+            program.getTypeChecker();
+            return;
+            function getOrCreateSourceFile(fileName) {
+                return getOrCreateSourceFileByPath(fileName, ts.toPath(fileName, currentDirectory, getCanonicalFileName));
+            }
+            function getOrCreateSourceFileByPath(fileName, path) {
+                ts.Debug.assert(hostCache !== undefined);
+                // The program is asking for this file, check first if the host can locate it.
+                // If the host can not locate the file, then it does not exist. return undefined
+                // to the program to allow reporting of errors for missing files.
+                var hostFileInformation = hostCache.getOrCreateEntryByPath(fileName, path);
+                if (!hostFileInformation) {
+                    return undefined;
+                }
+                // Check if the language version has changed since we last created a program; if they are the same,
+                // it is safe to reuse the sourceFiles; if not, then the shape of the AST can change, and the oldSourceFile
+                // can not be reused. we have to dump all syntax trees and create new ones.
+                if (!changesInCompilationSettingsAffectSyntax) {
+                    // Check if the old program had this file already
+                    var oldSourceFile = program && program.getSourceFileByPath(path);
+                    if (oldSourceFile) {
+                        // We already had a source file for this file name.  Go to the registry to
+                        // ensure that we get the right up to date version of it.  We need this to
+                        // address the following race-condition.  Specifically, say we have the following:
+                        //
+                        //      LS1
+                        //          \
+                        //           DocumentRegistry
+                        //          /
+                        //      LS2
+                        //
+                        // Each LS has a reference to file 'foo.ts' at version 1.  LS2 then updates
+                        // it's version of 'foo.ts' to version 2.  This will cause LS2 and the
+                        // DocumentRegistry to have version 2 of the document.  HOwever, LS1 will
+                        // have version 1.  And *importantly* this source file will be *corrupt*.
+                        // The act of creating version 2 of the file irrevocably damages the version
+                        // 1 file.
+                        //
+                        // So, later when we call into LS1, we need to make sure that it doesn't use
+                        // it's source file any more, and instead defers to DocumentRegistry to get
+                        // either version 1, version 2 (or some other version) depending on what the
+                        // host says should be used.
+                        // We do not support the scenario where a host can modify a registered
+                        // file's script kind, i.e. in one project some file is treated as ".ts"
+                        // and in another as ".js"
+                        ts.Debug.assert(hostFileInformation.scriptKind === oldSourceFile.scriptKind, "Registered script kind (" + oldSourceFile.scriptKind + ") should match new script kind (" + hostFileInformation.scriptKind + ") for file: " + path);
+                        return documentRegistry.updateDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
+                    }
+                }
+                // Could not find this file in the old program, create a new SourceFile for it.
+                return documentRegistry.acquireDocumentWithKey(fileName, path, newSettings, documentRegistryBucketKey, hostFileInformation.scriptSnapshot, hostFileInformation.version, hostFileInformation.scriptKind);
+            }
+            function sourceFileUpToDate(sourceFile) {
+                if (!sourceFile) {
+                    return false;
+                }
+                var path = sourceFile.path || ts.toPath(sourceFile.fileName, currentDirectory, getCanonicalFileName);
+                return sourceFile.version === hostCache.getVersion(path);
+            }
+            function programUpToDate() {
+                // If we haven't create a program yet, then it is not up-to-date
+                if (!program) {
+                    return false;
+                }
+                // If number of files in the program do not match, it is not up-to-date
+                var rootFileNames = hostCache.getRootFileNames();
+                if (program.getSourceFiles().length !== rootFileNames.length) {
+                    return false;
+                }
+                // If any file is not up-to-date, then the whole program is not up-to-date
+                for (var _i = 0, rootFileNames_2 = rootFileNames; _i < rootFileNames_2.length; _i++) {
+                    var fileName = rootFileNames_2[_i];
+                    if (!sourceFileUpToDate(program.getSourceFile(fileName))) {
+                        return false;
+                    }
+                }
+                // If the compilation settings do no match, then the program is not up-to-date
+                return ts.compareDataObjects(program.getCompilerOptions(), hostCache.compilationSettings());
+            }
+        }
+        function getProgram() {
+            synchronizeHostData();
+            return program;
+        }
+        function cleanupSemanticCache() {
+            // TODO: Should we jettison the program (or it's type checker) here?
+        }
+        function dispose() {
+            if (program) {
+                ts.forEach(program.getSourceFiles(), function (f) {
+                    return documentRegistry.releaseDocument(f.fileName, program.getCompilerOptions());
+                });
+            }
+        }
+        /// Diagnostics
+        function getSyntacticDiagnostics(fileName) {
+            synchronizeHostData();
+            return program.getSyntacticDiagnostics(getValidSourceFile(fileName), cancellationToken);
+        }
+        /**
+         * getSemanticDiagnostics return array of Diagnostics. If '-d' is not enabled, only report semantic errors
+         * If '-d' enabled, report both semantic and emitter errors
+         */
+        function getSemanticDiagnostics(fileName) {
+            synchronizeHostData();
+            var targetSourceFile = getValidSourceFile(fileName);
+            // Only perform the action per file regardless of '-out' flag as LanguageServiceHost is expected to call this function per file.
+            // Therefore only get diagnostics for given file.
+            var semanticDiagnostics = program.getSemanticDiagnostics(targetSourceFile, cancellationToken);
+            if (!program.getCompilerOptions().declaration) {
+                return semanticDiagnostics;
+            }
+            // If '-d' is enabled, check for emitter error. One example of emitter error is export class implements non-export interface
+            var declarationDiagnostics = program.getDeclarationDiagnostics(targetSourceFile, cancellationToken);
+            return ts.concatenate(semanticDiagnostics, declarationDiagnostics);
+        }
+        function getCompilerOptionsDiagnostics() {
+            synchronizeHostData();
+            return program.getOptionsDiagnostics(cancellationToken).concat(program.getGlobalDiagnostics(cancellationToken));
+        }
+        /**
+         * Get the name to be display in completion from a given symbol.
+         *
+         * @return undefined if the name is of external module otherwise a name with striped of any quote
+         */
+        function getCompletionEntryDisplayNameForSymbol(symbol, target, performCharacterChecks, location) {
+            var displayName = ts.getDeclaredName(program.getTypeChecker(), symbol, location);
+            if (displayName) {
+                var firstCharCode = displayName.charCodeAt(0);
+                // First check of the displayName is not external module; if it is an external module, it is not valid entry
+                if ((symbol.flags & 1536 /* Namespace */) && (firstCharCode === 39 /* singleQuote */ || firstCharCode === 34 /* doubleQuote */)) {
+                    // If the symbol is external module, don't show it in the completion list
+                    // (i.e declare module "http" { const x; } | // <= request completion here, "http" should not be there)
+                    return undefined;
+                }
+            }
+            return getCompletionEntryDisplayName(displayName, target, performCharacterChecks);
+        }
+        /**
+         * Get a displayName from a given for completion list, performing any necessary quotes stripping
+         * and checking whether the name is valid identifier name.
+         */
+        function getCompletionEntryDisplayName(name, target, performCharacterChecks) {
+            if (!name) {
+                return undefined;
+            }
+            name = ts.stripQuotes(name);
+            if (!name) {
+                return undefined;
+            }
+            // If the user entered name for the symbol was quoted, removing the quotes is not enough, as the name could be an
+            // invalid identifier name. We need to check if whatever was inside the quotes is actually a valid identifier name.
+            // e.g "b a" is valid quoted name but when we strip off the quotes, it is invalid.
+            // We, thus, need to check if whatever was inside the quotes is actually a valid identifier name.
+            if (performCharacterChecks) {
+                if (!ts.isIdentifier(name, target)) {
+                    return undefined;
+                }
+            }
+            return name;
+        }
+        function getCompletionData(fileName, position) {
+            var typeChecker = program.getTypeChecker();
+            var sourceFile = getValidSourceFile(fileName);
+            var isJavaScriptFile = ts.isSourceFileJavaScript(sourceFile);
+            var isJsDocTagName = false;
+            var start = new Date().getTime();
+            var currentToken = ts.getTokenAtPosition(sourceFile, position);
+            log("getCompletionData: Get current token: " + (new Date().getTime() - start));
+            start = new Date().getTime();
+            // Completion not allowed inside comments, bail out if this is the case
+            var insideComment = isInsideComment(sourceFile, currentToken, position);
+            log("getCompletionData: Is inside comment: " + (new Date().getTime() - start));
+            if (insideComment) {
+                // The current position is next to the '@' sign, when no tag name being provided yet.
+                // Provide a full list of tag names
+                if (ts.hasDocComment(sourceFile, position) && sourceFile.text.charCodeAt(position - 1) === 64 /* at */) {
+                    isJsDocTagName = true;
+                }
+                // Completion should work inside certain JsDoc tags. For example:
+                //     /** @type {number | string} */
+                // Completion should work in the brackets
+                var insideJsDocTagExpression = false;
+                var tag = ts.getJsDocTagAtPosition(sourceFile, position);
+                if (tag) {
+                    if (tag.tagName.pos <= position && position <= tag.tagName.end) {
+                        isJsDocTagName = true;
+                    }
+                    switch (tag.kind) {
+                        case 277 /* JSDocTypeTag */:
+                        case 275 /* JSDocParameterTag */:
+                        case 276 /* JSDocReturnTag */:
+                            var tagWithExpression = tag;
+                            if (tagWithExpression.typeExpression) {
+                                insideJsDocTagExpression = tagWithExpression.typeExpression.pos < position && position < tagWithExpression.typeExpression.end;
+                            }
+                            break;
+                    }
+                }
+                if (isJsDocTagName) {
+                    return { symbols: undefined, isMemberCompletion: false, isNewIdentifierLocation: false, location: undefined, isRightOfDot: false, isJsDocTagName: isJsDocTagName };
+                }
+                if (!insideJsDocTagExpression) {
+                    // Proceed if the current position is in jsDoc tag expression; otherwise it is a normal
+                    // comment or the plain text part of a jsDoc comment, so no completion should be available
+                    log("Returning an empty list because completion was inside a regular comment or plain text part of a JsDoc comment.");
+                    return undefined;
+                }
+            }
+            start = new Date().getTime();
+            var previousToken = ts.findPrecedingToken(position, sourceFile);
+            log("getCompletionData: Get previous token 1: " + (new Date().getTime() - start));
+            // The decision to provide completion depends on the contextToken, which is determined through the previousToken.
+            // Note: 'previousToken' (and thus 'contextToken') can be undefined if we are the beginning of the file
+            var contextToken = previousToken;
+            // Check if the caret is at the end of an identifier; this is a partial identifier that we want to complete: e.g. a.toS|
+            // Skip this partial identifier and adjust the contextToken to the token that precedes it.
+            if (contextToken && position <= contextToken.end && ts.isWord(contextToken.kind)) {
+                var start_5 = new Date().getTime();
+                contextToken = ts.findPrecedingToken(contextToken.getFullStart(), sourceFile);
+                log("getCompletionData: Get previous token 2: " + (new Date().getTime() - start_5));
+            }
+            // Find the node where completion is requested on.
+            // Also determine whether we are trying to complete with members of that node
+            // or attributes of a JSX tag.
+            var node = currentToken;
+            var isRightOfDot = false;
+            var isRightOfOpenTag = false;
+            var isStartingCloseTag = false;
+            var location = ts.getTouchingPropertyName(sourceFile, position);
+            if (contextToken) {
+                // Bail out if this is a known invalid completion location
+                if (isCompletionListBlocker(contextToken)) {
+                    log("Returning an empty list because completion was requested in an invalid position.");
+                    return undefined;
+                }
+                var parent_16 = contextToken.parent, kind = contextToken.kind;
+                if (kind === 21 /* DotToken */) {
+                    if (parent_16.kind === 172 /* PropertyAccessExpression */) {
+                        node = contextToken.parent.expression;
+                        isRightOfDot = true;
+                    }
+                    else if (parent_16.kind === 139 /* QualifiedName */) {
+                        node = contextToken.parent.left;
+                        isRightOfDot = true;
+                    }
+                    else {
+                        // There is nothing that precedes the dot, so this likely just a stray character
+                        // or leading into a '...' token. Just bail out instead.
+                        return undefined;
+                    }
+                }
+                else if (sourceFile.languageVariant === 1 /* JSX */) {
+                    if (kind === 25 /* LessThanToken */) {
+                        isRightOfOpenTag = true;
+                        location = contextToken;
+                    }
+                    else if (kind === 39 /* SlashToken */ && contextToken.parent.kind === 245 /* JsxClosingElement */) {
+                        isStartingCloseTag = true;
+                        location = contextToken;
+                    }
+                }
+            }
+            var semanticStart = new Date().getTime();
+            var isMemberCompletion;
+            var isNewIdentifierLocation;
+            var symbols = [];
+            if (isRightOfDot) {
+                getTypeScriptMemberSymbols();
+            }
+            else if (isRightOfOpenTag) {
+                var tagSymbols = typeChecker.getJsxIntrinsicTagNames();
+                if (tryGetGlobalSymbols()) {
+                    symbols = tagSymbols.concat(symbols.filter(function (s) { return !!(s.flags & (107455 /* Value */ | 8388608 /* Alias */)); }));
+                }
+                else {
+                    symbols = tagSymbols;
+                }
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+            }
+            else if (isStartingCloseTag) {
+                var tagName = contextToken.parent.parent.openingElement.tagName;
+                var tagSymbol = typeChecker.getSymbolAtLocation(tagName);
+                if (!typeChecker.isUnknownSymbol(tagSymbol)) {
+                    symbols = [tagSymbol];
+                }
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+            }
+            else {
+                // For JavaScript or TypeScript, if we're not after a dot, then just try to get the
+                // global symbols in scope.  These results should be valid for either language as
+                // the set of symbols that can be referenced from this location.
+                if (!tryGetGlobalSymbols()) {
+                    return undefined;
+                }
+            }
+            log("getCompletionData: Semantic work: " + (new Date().getTime() - semanticStart));
+            return { symbols: symbols, isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, location: location, isRightOfDot: (isRightOfDot || isRightOfOpenTag), isJsDocTagName: isJsDocTagName };
+            function getTypeScriptMemberSymbols() {
+                // Right of dot member completion list
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+                if (node.kind === 69 /* Identifier */ || node.kind === 139 /* QualifiedName */ || node.kind === 172 /* PropertyAccessExpression */) {
+                    var symbol = typeChecker.getSymbolAtLocation(node);
+                    // This is an alias, follow what it aliases
+                    if (symbol && symbol.flags & 8388608 /* Alias */) {
+                        symbol = typeChecker.getAliasedSymbol(symbol);
+                    }
+                    if (symbol && symbol.flags & 1952 /* HasExports */) {
+                        // Extract module or enum members
+                        var exportedSymbols = typeChecker.getExportsOfModule(symbol);
+                        ts.forEach(exportedSymbols, function (symbol) {
+                            if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
+                                symbols.push(symbol);
+                            }
+                        });
+                    }
+                }
+                var type = typeChecker.getTypeAtLocation(node);
+                addTypeProperties(type);
+            }
+            function addTypeProperties(type) {
+                if (type) {
+                    // Filter private properties
+                    for (var _i = 0, _a = type.getApparentProperties(); _i < _a.length; _i++) {
+                        var symbol = _a[_i];
+                        if (typeChecker.isValidPropertyAccess((node.parent), symbol.name)) {
+                            symbols.push(symbol);
+                        }
+                    }
+                    if (isJavaScriptFile && type.flags & 16384 /* Union */) {
+                        // In javascript files, for union types, we don't just get the members that
+                        // the individual types have in common, we also include all the members that
+                        // each individual type has.  This is because we're going to add all identifiers
+                        // anyways.  So we might as well elevate the members that were at least part
+                        // of the individual types to a higher status since we know what they are.
+                        var unionType = type;
+                        for (var _b = 0, _c = unionType.types; _b < _c.length; _b++) {
+                            var elementType = _c[_b];
+                            addTypeProperties(elementType);
+                        }
+                    }
+                }
+            }
+            function tryGetGlobalSymbols() {
+                var objectLikeContainer;
+                var namedImportsOrExports;
+                var jsxContainer;
+                if (objectLikeContainer = tryGetObjectLikeCompletionContainer(contextToken)) {
+                    return tryGetObjectLikeCompletionSymbols(objectLikeContainer);
+                }
+                if (namedImportsOrExports = tryGetNamedImportsOrExportsForCompletion(contextToken)) {
+                    // cursor is in an import clause
+                    // try to show exported member for imported module
+                    return tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports);
+                }
+                if (jsxContainer = tryGetContainingJsxElement(contextToken)) {
+                    var attrsType = void 0;
+                    if ((jsxContainer.kind === 242 /* JsxSelfClosingElement */) || (jsxContainer.kind === 243 /* JsxOpeningElement */)) {
+                        // Cursor is inside a JSX self-closing element or opening element
+                        attrsType = typeChecker.getJsxElementAttributesType(jsxContainer);
+                        if (attrsType) {
+                            symbols = filterJsxAttributes(typeChecker.getPropertiesOfType(attrsType), jsxContainer.attributes);
+                            isMemberCompletion = true;
+                            isNewIdentifierLocation = false;
+                            return true;
+                        }
+                    }
+                }
+                // Get all entities in the current scope.
+                isMemberCompletion = false;
+                isNewIdentifierLocation = isNewIdentifierDefinitionLocation(contextToken);
+                if (previousToken !== contextToken) {
+                    ts.Debug.assert(!!previousToken, "Expected 'contextToken' to be defined when different from 'previousToken'.");
+                }
+                // We need to find the node that will give us an appropriate scope to begin
+                // aggregating completion candidates. This is achieved in 'getScopeNode'
+                // by finding the first node that encompasses a position, accounting for whether a node
+                // is "complete" to decide whether a position belongs to the node.
+                //
+                // However, at the end of an identifier, we are interested in the scope of the identifier
+                // itself, but fall outside of the identifier. For instance:
+                //
+                //      xyz => x$
+                //
+                // the cursor is outside of both the 'x' and the arrow function 'xyz => x',
+                // so 'xyz' is not returned in our results.
+                //
+                // We define 'adjustedPosition' so that we may appropriately account for
+                // being at the end of an identifier. The intention is that if requesting completion
+                // at the end of an identifier, it should be effectively equivalent to requesting completion
+                // anywhere inside/at the beginning of the identifier. So in the previous case, the
+                // 'adjustedPosition' will work as if requesting completion in the following:
+                //
+                //      xyz => $x
+                //
+                // If previousToken !== contextToken, then
+                //   - 'contextToken' was adjusted to the token prior to 'previousToken'
+                //      because we were at the end of an identifier.
+                //   - 'previousToken' is defined.
+                var adjustedPosition = previousToken !== contextToken ?
+                    previousToken.getStart() :
+                    position;
+                var scopeNode = getScopeNode(contextToken, adjustedPosition, sourceFile) || sourceFile;
+                /// TODO filter meaning based on the current context
+                var symbolMeanings = 793056 /* Type */ | 107455 /* Value */ | 1536 /* Namespace */ | 8388608 /* Alias */;
+                symbols = typeChecker.getSymbolsInScope(scopeNode, symbolMeanings);
+                return true;
+            }
+            /**
+             * Finds the first node that "embraces" the position, so that one may
+             * accurately aggregate locals from the closest containing scope.
+             */
+            function getScopeNode(initialToken, position, sourceFile) {
+                var scope = initialToken;
+                while (scope && !ts.positionBelongsToNode(scope, position, sourceFile)) {
+                    scope = scope.parent;
+                }
+                return scope;
+            }
+            function isCompletionListBlocker(contextToken) {
+                var start = new Date().getTime();
+                var result = isInStringOrRegularExpressionOrTemplateLiteral(contextToken) ||
+                    isSolelyIdentifierDefinitionLocation(contextToken) ||
+                    isDotOfNumericLiteral(contextToken) ||
+                    isInJsxText(contextToken);
+                log("getCompletionsAtPosition: isCompletionListBlocker: " + (new Date().getTime() - start));
+                return result;
+            }
+            function isInJsxText(contextToken) {
+                if (contextToken.kind === 244 /* JsxText */) {
+                    return true;
+                }
+                if (contextToken.kind === 27 /* GreaterThanToken */ && contextToken.parent) {
+                    if (contextToken.parent.kind === 243 /* JsxOpeningElement */) {
+                        return true;
+                    }
+                    if (contextToken.parent.kind === 245 /* JsxClosingElement */ || contextToken.parent.kind === 242 /* JsxSelfClosingElement */) {
+                        return contextToken.parent.parent && contextToken.parent.parent.kind === 241 /* JsxElement */;
+                    }
+                }
+                return false;
+            }
+            function isNewIdentifierDefinitionLocation(previousToken) {
+                if (previousToken) {
+                    var containingNodeKind = previousToken.parent.kind;
+                    switch (previousToken.kind) {
+                        case 24 /* CommaToken */:
+                            return containingNodeKind === 174 /* CallExpression */ // func( a, |
+                                || containingNodeKind === 148 /* Constructor */ // constructor( a, |   /* public, protected, private keywords are allowed here, so show completion */
+                                || containingNodeKind === 175 /* NewExpression */ // new C(a, |
+                                || containingNodeKind === 170 /* ArrayLiteralExpression */ // [a, |
+                                || containingNodeKind === 187 /* BinaryExpression */ // const x = (a, |
+                                || containingNodeKind === 156 /* FunctionType */; // var x: (s: string, list|
+                        case 17 /* OpenParenToken */:
+                            return containingNodeKind === 174 /* CallExpression */ // func( |
+                                || containingNodeKind === 148 /* Constructor */ // constructor( |
+                                || containingNodeKind === 175 /* NewExpression */ // new C(a|
+                                || containingNodeKind === 178 /* ParenthesizedExpression */ // const x = (a|
+                                || containingNodeKind === 164 /* ParenthesizedType */; // function F(pred: (a| /* this can become an arrow function, where 'a' is the argument */
+                        case 19 /* OpenBracketToken */:
+                            return containingNodeKind === 170 /* ArrayLiteralExpression */ // [ |
+                                || containingNodeKind === 153 /* IndexSignature */ // [ | : string ]
+                                || containingNodeKind === 140 /* ComputedPropertyName */; // [ |    /* this can become an index signature */
+                        case 125 /* ModuleKeyword */: // module |
+                        case 126 /* NamespaceKeyword */:
+                            return true;
+                        case 21 /* DotToken */:
+                            return containingNodeKind === 225 /* ModuleDeclaration */; // module A.|
+                        case 15 /* OpenBraceToken */:
+                            return containingNodeKind === 221 /* ClassDeclaration */; // class A{ |
+                        case 56 /* EqualsToken */:
+                            return containingNodeKind === 218 /* VariableDeclaration */ // const x = a|
+                                || containingNodeKind === 187 /* BinaryExpression */; // x = a|
+                        case 12 /* TemplateHead */:
+                            return containingNodeKind === 189 /* TemplateExpression */; // `aa ${|
+                        case 13 /* TemplateMiddle */:
+                            return containingNodeKind === 197 /* TemplateSpan */; // `aa ${10} dd ${|
+                        case 112 /* PublicKeyword */:
+                        case 110 /* PrivateKeyword */:
+                        case 111 /* ProtectedKeyword */:
+                            return containingNodeKind === 145 /* PropertyDeclaration */; // class A{ public |
+                    }
+                    // Previous token may have been a keyword that was converted to an identifier.
+                    switch (previousToken.getText()) {
+                        case "public":
+                        case "protected":
+                        case "private":
+                            return true;
+                    }
+                }
+                return false;
+            }
+            function isInStringOrRegularExpressionOrTemplateLiteral(contextToken) {
+                if (contextToken.kind === 9 /* StringLiteral */
+                    || contextToken.kind === 166 /* StringLiteralType */
+                    || contextToken.kind === 10 /* RegularExpressionLiteral */
+                    || ts.isTemplateLiteralKind(contextToken.kind)) {
+                    var start_6 = contextToken.getStart();
+                    var end = contextToken.getEnd();
+                    // To be "in" one of these literals, the position has to be:
+                    //   1. entirely within the token text.
+                    //   2. at the end position of an unterminated token.
+                    //   3. at the end of a regular expression (due to trailing flags like '/foo/g').
+                    if (start_6 < position && position < end) {
+                        return true;
+                    }
+                    if (position === end) {
+                        return !!contextToken.isUnterminated
+                            || contextToken.kind === 10 /* RegularExpressionLiteral */;
+                    }
+                }
+                return false;
+            }
+            /**
+             * Aggregates relevant symbols for completion in object literals and object binding patterns.
+             * Relevant symbols are stored in the captured 'symbols' variable.
+             *
+             * @returns true if 'symbols' was successfully populated; false otherwise.
+             */
+            function tryGetObjectLikeCompletionSymbols(objectLikeContainer) {
+                // We're looking up possible property names from contextual/inferred/declared type.
+                isMemberCompletion = true;
+                var typeForObject;
+                var existingMembers;
+                if (objectLikeContainer.kind === 171 /* ObjectLiteralExpression */) {
+                    // We are completing on contextual types, but may also include properties
+                    // other than those within the declared type.
+                    isNewIdentifierLocation = true;
+                    typeForObject = typeChecker.getContextualType(objectLikeContainer);
+                    existingMembers = objectLikeContainer.properties;
+                }
+                else if (objectLikeContainer.kind === 167 /* ObjectBindingPattern */) {
+                    // We are *only* completing on properties from the type being destructured.
+                    isNewIdentifierLocation = false;
+                    var rootDeclaration = ts.getRootDeclaration(objectLikeContainer.parent);
+                    if (ts.isVariableLike(rootDeclaration)) {
+                        // We don't want to complete using the type acquired by the shape
+                        // of the binding pattern; we are only interested in types acquired
+                        // through type declaration or inference.
+                        // Also proceed if rootDeclaration is parameter and if its containing function expression\arrow function is contextually typed -
+                        // type of parameter will flow in from the contextual type of the function
+                        var canGetType = !!(rootDeclaration.initializer || rootDeclaration.type);
+                        if (!canGetType && rootDeclaration.kind === 142 /* Parameter */) {
+                            if (ts.isExpression(rootDeclaration.parent)) {
+                                canGetType = !!typeChecker.getContextualType(rootDeclaration.parent);
+                            }
+                            else if (rootDeclaration.parent.kind === 147 /* MethodDeclaration */ || rootDeclaration.parent.kind === 150 /* SetAccessor */) {
+                                canGetType = ts.isExpression(rootDeclaration.parent.parent) && !!typeChecker.getContextualType(rootDeclaration.parent.parent);
+                            }
+                        }
+                        if (canGetType) {
+                            typeForObject = typeChecker.getTypeAtLocation(objectLikeContainer);
+                            existingMembers = objectLikeContainer.elements;
+                        }
+                    }
+                    else {
+                        ts.Debug.fail("Root declaration is not variable-like.");
+                    }
+                }
+                else {
+                    ts.Debug.fail("Expected object literal or binding pattern, got " + objectLikeContainer.kind);
+                }
+                if (!typeForObject) {
+                    return false;
+                }
+                var typeMembers = typeChecker.getPropertiesOfType(typeForObject);
+                if (typeMembers && typeMembers.length > 0) {
+                    // Add filtered items to the completion list
+                    symbols = filterObjectMembersList(typeMembers, existingMembers);
+                }
+                return true;
+            }
+            /**
+             * Aggregates relevant symbols for completion in import clauses and export clauses
+             * whose declarations have a module specifier; for instance, symbols will be aggregated for
+             *
+             *      import { | } from "moduleName";
+             *      export { a as foo, | } from "moduleName";
+             *
+             * but not for
+             *
+             *      export { | };
+             *
+             * Relevant symbols are stored in the captured 'symbols' variable.
+             *
+             * @returns true if 'symbols' was successfully populated; false otherwise.
+             */
+            function tryGetImportOrExportClauseCompletionSymbols(namedImportsOrExports) {
+                var declarationKind = namedImportsOrExports.kind === 233 /* NamedImports */ ?
+                    230 /* ImportDeclaration */ :
+                    236 /* ExportDeclaration */;
+                var importOrExportDeclaration = ts.getAncestor(namedImportsOrExports, declarationKind);
+                var moduleSpecifier = importOrExportDeclaration.moduleSpecifier;
+                if (!moduleSpecifier) {
+                    return false;
+                }
+                isMemberCompletion = true;
+                isNewIdentifierLocation = false;
+                var exports;
+                var moduleSpecifierSymbol = typeChecker.getSymbolAtLocation(importOrExportDeclaration.moduleSpecifier);
+                if (moduleSpecifierSymbol) {
+                    exports = typeChecker.getExportsOfModule(moduleSpecifierSymbol);
+                }
+                symbols = exports ? filterNamedImportOrExportCompletionItems(exports, namedImportsOrExports.elements) : emptyArray;
+                return true;
+            }
+            /**
+             * Returns the immediate owning object literal or binding pattern of a context token,
+             * on the condition that one exists and that the context implies completion should be given.
+             */
+            function tryGetObjectLikeCompletionContainer(contextToken) {
+                if (contextToken) {
+                    switch (contextToken.kind) {
+                        case 15 /* OpenBraceToken */: // const x = { |
+                        case 24 /* CommaToken */:
+                            var parent_17 = contextToken.parent;
+                            if (parent_17 && (parent_17.kind === 171 /* ObjectLiteralExpression */ || parent_17.kind === 167 /* ObjectBindingPattern */)) {
+                                return parent_17;
+                            }
+                            break;
+                    }
+                }
+                return undefined;
+            }
+            /**
+             * Returns the containing list of named imports or exports of a context token,
+             * on the condition that one exists and that the context implies completion should be given.
+             */
+            function tryGetNamedImportsOrExportsForCompletion(contextToken) {
+                if (contextToken) {
+                    switch (contextToken.kind) {
+                        case 15 /* OpenBraceToken */: // import { |
+                        case 24 /* CommaToken */:
+                            switch (contextToken.parent.kind) {
+                                case 233 /* NamedImports */:
+                                case 237 /* NamedExports */:
+                                    return contextToken.parent;
+                            }
+                    }
+                }
+                return undefined;
+            }
+            function tryGetContainingJsxElement(contextToken) {
+                if (contextToken) {
+                    var parent_18 = contextToken.parent;
+                    switch (contextToken.kind) {
+                        case 26 /* LessThanSlashToken */:
+                        case 39 /* SlashToken */:
+                        case 69 /* Identifier */:
+                        case 246 /* JsxAttribute */:
+                        case 247 /* JsxSpreadAttribute */:
+                            if (parent_18 && (parent_18.kind === 242 /* JsxSelfClosingElement */ || parent_18.kind === 243 /* JsxOpeningElement */)) {
+                                return parent_18;
+                            }
+                            else if (parent_18.kind === 246 /* JsxAttribute */) {
+                                return parent_18.parent;
+                            }
+                            break;
+                        // The context token is the closing } or " of an attribute, which means
+                        // its parent is a JsxExpression, whose parent is a JsxAttribute,
+                        // whose parent is a JsxOpeningLikeElement
+                        case 9 /* StringLiteral */:
+                            if (parent_18 && ((parent_18.kind === 246 /* JsxAttribute */) || (parent_18.kind === 247 /* JsxSpreadAttribute */))) {
+                                return parent_18.parent;
+                            }
+                            break;
+                        case 16 /* CloseBraceToken */:
+                            if (parent_18 &&
+                                parent_18.kind === 248 /* JsxExpression */ &&
+                                parent_18.parent &&
+                                (parent_18.parent.kind === 246 /* JsxAttribute */)) {
+                                return parent_18.parent.parent;
+                            }
+                            if (parent_18 && parent_18.kind === 247 /* JsxSpreadAttribute */) {
+                                return parent_18.parent;
+                            }
+                            break;
+                    }
+                }
+                return undefined;
+            }
+            function isFunction(kind) {
+                switch (kind) {
+                    case 179 /* FunctionExpression */:
+                    case 180 /* ArrowFunction */:
+                    case 220 /* FunctionDeclaration */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                    case 151 /* CallSignature */:
+                    case 152 /* ConstructSignature */:
+                    case 153 /* IndexSignature */:
+                        return true;
+                }
+                return false;
+            }
+            /**
+             * @returns true if we are certain that the currently edited location must define a new location; false otherwise.
+             */
+            function isSolelyIdentifierDefinitionLocation(contextToken) {
+                var containingNodeKind = contextToken.parent.kind;
+                switch (contextToken.kind) {
+                    case 24 /* CommaToken */:
+                        return containingNodeKind === 218 /* VariableDeclaration */ ||
+                            containingNodeKind === 219 /* VariableDeclarationList */ ||
+                            containingNodeKind === 200 /* VariableStatement */ ||
+                            containingNodeKind === 224 /* EnumDeclaration */ ||
+                            isFunction(containingNodeKind) ||
+                            containingNodeKind === 221 /* ClassDeclaration */ ||
+                            containingNodeKind === 192 /* ClassExpression */ ||
+                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
+                            containingNodeKind === 168 /* ArrayBindingPattern */ ||
+                            containingNodeKind === 223 /* TypeAliasDeclaration */; // type Map, K, |
+                    case 21 /* DotToken */:
+                        return containingNodeKind === 168 /* ArrayBindingPattern */; // var [.|
+                    case 54 /* ColonToken */:
+                        return containingNodeKind === 169 /* BindingElement */; // var {x :html|
+                    case 19 /* OpenBracketToken */:
+                        return containingNodeKind === 168 /* ArrayBindingPattern */; // var [x|
+                    case 17 /* OpenParenToken */:
+                        return containingNodeKind === 252 /* CatchClause */ ||
+                            isFunction(containingNodeKind);
+                    case 15 /* OpenBraceToken */:
+                        return containingNodeKind === 224 /* EnumDeclaration */ ||
+                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
+                            containingNodeKind === 159 /* TypeLiteral */; // const x : { |
+                    case 23 /* SemicolonToken */:
+                        return containingNodeKind === 144 /* PropertySignature */ &&
+                            contextToken.parent && contextToken.parent.parent &&
+                            (contextToken.parent.parent.kind === 222 /* InterfaceDeclaration */ ||
+                                contextToken.parent.parent.kind === 159 /* TypeLiteral */); // const x : { a; |
+                    case 25 /* LessThanToken */:
+                        return containingNodeKind === 221 /* ClassDeclaration */ ||
+                            containingNodeKind === 192 /* ClassExpression */ ||
+                            containingNodeKind === 222 /* InterfaceDeclaration */ ||
+                            containingNodeKind === 223 /* TypeAliasDeclaration */ ||
+                            isFunction(containingNodeKind);
+                    case 113 /* StaticKeyword */:
+                        return containingNodeKind === 145 /* PropertyDeclaration */;
+                    case 22 /* DotDotDotToken */:
+                        return containingNodeKind === 142 /* Parameter */ ||
+                            (contextToken.parent && contextToken.parent.parent &&
+                                contextToken.parent.parent.kind === 168 /* ArrayBindingPattern */); // var [...z|
+                    case 112 /* PublicKeyword */:
+                    case 110 /* PrivateKeyword */:
+                    case 111 /* ProtectedKeyword */:
+                        return containingNodeKind === 142 /* Parameter */;
+                    case 116 /* AsKeyword */:
+                        return containingNodeKind === 234 /* ImportSpecifier */ ||
+                            containingNodeKind === 238 /* ExportSpecifier */ ||
+                            containingNodeKind === 232 /* NamespaceImport */;
+                    case 73 /* ClassKeyword */:
+                    case 81 /* EnumKeyword */:
+                    case 107 /* InterfaceKeyword */:
+                    case 87 /* FunctionKeyword */:
+                    case 102 /* VarKeyword */:
+                    case 123 /* GetKeyword */:
+                    case 131 /* SetKeyword */:
+                    case 89 /* ImportKeyword */:
+                    case 108 /* LetKeyword */:
+                    case 74 /* ConstKeyword */:
+                    case 114 /* YieldKeyword */:
+                    case 134 /* TypeKeyword */:
+                        return true;
+                }
+                // Previous token may have been a keyword that was converted to an identifier.
+                switch (contextToken.getText()) {
+                    case "abstract":
+                    case "async":
+                    case "class":
+                    case "const":
+                    case "declare":
+                    case "enum":
+                    case "function":
+                    case "interface":
+                    case "let":
+                    case "private":
+                    case "protected":
+                    case "public":
+                    case "static":
+                    case "var":
+                    case "yield":
+                        return true;
+                }
+                return false;
+            }
+            function isDotOfNumericLiteral(contextToken) {
+                if (contextToken.kind === 8 /* NumericLiteral */) {
+                    var text = contextToken.getFullText();
+                    return text.charAt(text.length - 1) === ".";
+                }
+                return false;
+            }
+            /**
+             * Filters out completion suggestions for named imports or exports.
+             *
+             * @param exportsOfModule          The list of symbols which a module exposes.
+             * @param namedImportsOrExports    The list of existing import/export specifiers in the import/export clause.
+             *
+             * @returns Symbols to be suggested at an import/export clause, barring those whose named imports/exports
+             *          do not occur at the current position and have not otherwise been typed.
+             */
+            function filterNamedImportOrExportCompletionItems(exportsOfModule, namedImportsOrExports) {
+                var existingImportsOrExports = {};
+                for (var _i = 0, namedImportsOrExports_1 = namedImportsOrExports; _i < namedImportsOrExports_1.length; _i++) {
+                    var element = namedImportsOrExports_1[_i];
+                    // If this is the current item we are editing right now, do not filter it out
+                    if (element.getStart() <= position && position <= element.getEnd()) {
+                        continue;
+                    }
+                    var name_40 = element.propertyName || element.name;
+                    existingImportsOrExports[name_40.text] = true;
+                }
+                if (ts.isEmpty(existingImportsOrExports)) {
+                    return ts.filter(exportsOfModule, function (e) { return e.name !== "default"; });
+                }
+                return ts.filter(exportsOfModule, function (e) { return e.name !== "default" && !ts.lookUp(existingImportsOrExports, e.name); });
+            }
+            /**
+             * Filters out completion suggestions for named imports or exports.
+             *
+             * @returns Symbols to be suggested in an object binding pattern or object literal expression, barring those whose declarations
+             *          do not occur at the current position and have not otherwise been typed.
+             */
+            function filterObjectMembersList(contextualMemberSymbols, existingMembers) {
+                if (!existingMembers || existingMembers.length === 0) {
+                    return contextualMemberSymbols;
+                }
+                var existingMemberNames = {};
+                for (var _i = 0, existingMembers_1 = existingMembers; _i < existingMembers_1.length; _i++) {
+                    var m = existingMembers_1[_i];
+                    // Ignore omitted expressions for missing members
+                    if (m.kind !== 253 /* PropertyAssignment */ &&
+                        m.kind !== 254 /* ShorthandPropertyAssignment */ &&
+                        m.kind !== 169 /* BindingElement */ &&
+                        m.kind !== 147 /* MethodDeclaration */) {
+                        continue;
+                    }
+                    // If this is the current item we are editing right now, do not filter it out
+                    if (m.getStart() <= position && position <= m.getEnd()) {
+                        continue;
+                    }
+                    var existingName = void 0;
+                    if (m.kind === 169 /* BindingElement */ && m.propertyName) {
+                        // include only identifiers in completion list
+                        if (m.propertyName.kind === 69 /* Identifier */) {
+                            existingName = m.propertyName.text;
+                        }
+                    }
+                    else {
+                        // TODO(jfreeman): Account for computed property name
+                        // NOTE: if one only performs this step when m.name is an identifier,
+                        // things like '__proto__' are not filtered out.
+                        existingName = m.name.text;
+                    }
+                    existingMemberNames[existingName] = true;
+                }
+                return ts.filter(contextualMemberSymbols, function (m) { return !ts.lookUp(existingMemberNames, m.name); });
+            }
+            /**
+             * Filters out completion suggestions from 'symbols' according to existing JSX attributes.
+             *
+             * @returns Symbols to be suggested in a JSX element, barring those whose attributes
+             *          do not occur at the current position and have not otherwise been typed.
+             */
+            function filterJsxAttributes(symbols, attributes) {
+                var seenNames = {};
+                for (var _i = 0, attributes_1 = attributes; _i < attributes_1.length; _i++) {
+                    var attr = attributes_1[_i];
+                    // If this is the current item we are editing right now, do not filter it out
+                    if (attr.getStart() <= position && position <= attr.getEnd()) {
+                        continue;
+                    }
+                    if (attr.kind === 246 /* JsxAttribute */) {
+                        seenNames[attr.name.text] = true;
+                    }
+                }
+                return ts.filter(symbols, function (a) { return !ts.lookUp(seenNames, a.name); });
+            }
+        }
+        function getCompletionsAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            if (ts.isInString(sourceFile, position)) {
+                return getStringLiteralCompletionEntries(sourceFile, position);
+            }
+            var completionData = getCompletionData(fileName, position);
+            if (!completionData) {
+                return undefined;
+            }
+            var symbols = completionData.symbols, isMemberCompletion = completionData.isMemberCompletion, isNewIdentifierLocation = completionData.isNewIdentifierLocation, location = completionData.location, isJsDocTagName = completionData.isJsDocTagName;
+            if (isJsDocTagName) {
+                // If the current position is a jsDoc tag name, only tag names should be provided for completion
+                return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: getAllJsDocCompletionEntries() };
+            }
+            var entries = [];
+            if (ts.isSourceFileJavaScript(sourceFile)) {
+                var uniqueNames = getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ false);
+                ts.addRange(entries, getJavaScriptCompletionEntries(sourceFile, location.pos, uniqueNames));
+            }
+            else {
+                if (!symbols || symbols.length === 0) {
+                    if (sourceFile.languageVariant === 1 /* JSX */ &&
+                        location.parent && location.parent.kind === 245 /* JsxClosingElement */) {
+                        // In the TypeScript JSX element, if such element is not defined. When users query for completion at closing tag,
+                        // instead of simply giving unknown value, the completion will return the tag-name of an associated opening-element.
+                        // For example:
+                        //     var x = <div> </ /*1*/>  completion list at "1" will contain "div" with type any
+                        var tagName = location.parent.parent.openingElement.tagName;
+                        entries.push({
+                            name: tagName.text,
+                            kind: undefined,
+                            kindModifiers: undefined,
+                            sortText: "0"
+                        });
+                    }
+                    else {
+                        return undefined;
+                    }
+                }
+                getCompletionEntriesFromSymbols(symbols, entries, location, /*performCharacterChecks*/ true);
+            }
+            // Add keywords if this is not a member completion list
+            if (!isMemberCompletion && !isJsDocTagName) {
+                ts.addRange(entries, keywordCompletions);
+            }
+            return { isMemberCompletion: isMemberCompletion, isNewIdentifierLocation: isNewIdentifierLocation, entries: entries };
+            function getJavaScriptCompletionEntries(sourceFile, position, uniqueNames) {
+                var entries = [];
+                var target = program.getCompilerOptions().target;
+                var nameTable = getNameTable(sourceFile);
+                for (var name_41 in nameTable) {
+                    // Skip identifiers produced only from the current location
+                    if (nameTable[name_41] === position) {
+                        continue;
+                    }
+                    if (!uniqueNames[name_41]) {
+                        uniqueNames[name_41] = name_41;
+                        var displayName = getCompletionEntryDisplayName(name_41, target, /*performCharacterChecks*/ true);
+                        if (displayName) {
+                            var entry = {
+                                name: displayName,
+                                kind: ScriptElementKind.warning,
+                                kindModifiers: "",
+                                sortText: "1"
+                            };
+                            entries.push(entry);
+                        }
+                    }
+                }
+                return entries;
+            }
+            function getAllJsDocCompletionEntries() {
+                return jsDocCompletionEntries || (jsDocCompletionEntries = ts.map(jsDocTagNames, function (tagName) {
+                    return {
+                        name: tagName,
+                        kind: ScriptElementKind.keyword,
+                        kindModifiers: "",
+                        sortText: "0"
+                    };
+                }));
+            }
+            function createCompletionEntry(symbol, location, performCharacterChecks) {
+                // Try to get a valid display name for this symbol, if we could not find one, then ignore it.
+                // We would like to only show things that can be added after a dot, so for instance numeric properties can
+                // not be accessed with a dot (a.1 <- invalid)
+                var displayName = getCompletionEntryDisplayNameForSymbol(symbol, program.getCompilerOptions().target, performCharacterChecks, location);
+                if (!displayName) {
+                    return undefined;
+                }
+                // TODO(drosen): Right now we just permit *all* semantic meanings when calling
+                // 'getSymbolKind' which is permissible given that it is backwards compatible; but
+                // really we should consider passing the meaning for the node so that we don't report
+                // that a suggestion for a value is an interface.  We COULD also just do what
+                // 'getSymbolModifiers' does, which is to use the first declaration.
+                // Use a 'sortText' of 0' so that all symbol completion entries come before any other
+                // entries (like JavaScript identifier entries).
+                return {
+                    name: displayName,
+                    kind: getSymbolKind(symbol, location),
+                    kindModifiers: getSymbolModifiers(symbol),
+                    sortText: "0"
+                };
+            }
+            function getCompletionEntriesFromSymbols(symbols, entries, location, performCharacterChecks) {
+                var start = new Date().getTime();
+                var uniqueNames = {};
+                if (symbols) {
+                    for (var _i = 0, symbols_4 = symbols; _i < symbols_4.length; _i++) {
+                        var symbol = symbols_4[_i];
+                        var entry = createCompletionEntry(symbol, location, performCharacterChecks);
+                        if (entry) {
+                            var id = ts.escapeIdentifier(entry.name);
+                            if (!ts.lookUp(uniqueNames, id)) {
+                                entries.push(entry);
+                                uniqueNames[id] = id;
+                            }
+                        }
+                    }
+                }
+                log("getCompletionsAtPosition: getCompletionEntriesFromSymbols: " + (new Date().getTime() - start));
+                return uniqueNames;
+            }
+            function getStringLiteralCompletionEntries(sourceFile, position) {
+                var node = ts.findPrecedingToken(position, sourceFile);
+                if (!node || node.kind !== 9 /* StringLiteral */) {
+                    return undefined;
+                }
+                var argumentInfo = ts.SignatureHelp.getContainingArgumentInfo(node, position, sourceFile);
+                if (argumentInfo) {
+                    // Get string literal completions from specialized signatures of the target
+                    return getStringLiteralCompletionEntriesFromCallExpression(argumentInfo);
+                }
+                else if (ts.isElementAccessExpression(node.parent) && node.parent.argumentExpression === node) {
+                    // Get all names of properties on the expression
+                    return getStringLiteralCompletionEntriesFromElementAccess(node.parent);
+                }
+                else {
+                    // Otherwise, get the completions from the contextual type if one exists
+                    return getStringLiteralCompletionEntriesFromContextualType(node);
+                }
+            }
+            function getStringLiteralCompletionEntriesFromCallExpression(argumentInfo) {
+                var typeChecker = program.getTypeChecker();
+                var candidates = [];
+                var entries = [];
+                typeChecker.getResolvedSignature(argumentInfo.invocation, candidates);
+                for (var _i = 0, candidates_3 = candidates; _i < candidates_3.length; _i++) {
+                    var candidate = candidates_3[_i];
+                    if (candidate.parameters.length > argumentInfo.argumentIndex) {
+                        var parameter = candidate.parameters[argumentInfo.argumentIndex];
+                        addStringLiteralCompletionsFromType(typeChecker.getTypeAtLocation(parameter.valueDeclaration), entries);
+                    }
+                }
+                if (entries.length) {
+                    return { isMemberCompletion: false, isNewIdentifierLocation: true, entries: entries };
+                }
+                return undefined;
+            }
+            function getStringLiteralCompletionEntriesFromElementAccess(node) {
+                var typeChecker = program.getTypeChecker();
+                var type = typeChecker.getTypeAtLocation(node.expression);
+                var entries = [];
+                if (type) {
+                    getCompletionEntriesFromSymbols(type.getApparentProperties(), entries, node, /*performCharacterChecks*/ false);
+                    if (entries.length) {
+                        return { isMemberCompletion: true, isNewIdentifierLocation: true, entries: entries };
+                    }
+                }
+                return undefined;
+            }
+            function getStringLiteralCompletionEntriesFromContextualType(node) {
+                var typeChecker = program.getTypeChecker();
+                var type = typeChecker.getContextualType(node);
+                if (type) {
+                    var entries_1 = [];
+                    addStringLiteralCompletionsFromType(type, entries_1);
+                    if (entries_1.length) {
+                        return { isMemberCompletion: false, isNewIdentifierLocation: false, entries: entries_1 };
+                    }
+                }
+                return undefined;
+            }
+            function addStringLiteralCompletionsFromType(type, result) {
+                if (!type) {
+                    return;
+                }
+                if (type.flags & 16384 /* Union */) {
+                    ts.forEach(type.types, function (t) { return addStringLiteralCompletionsFromType(t, result); });
+                }
+                else {
+                    if (type.flags & 256 /* StringLiteral */) {
+                        result.push({
+                            name: type.text,
+                            kindModifiers: ScriptElementKindModifier.none,
+                            kind: ScriptElementKind.variableElement,
+                            sortText: "0"
+                        });
+                    }
+                }
+            }
+        }
+        function getCompletionEntryDetails(fileName, position, entryName) {
+            synchronizeHostData();
+            // Compute all the completion symbols again.
+            var completionData = getCompletionData(fileName, position);
+            if (completionData) {
+                var symbols = completionData.symbols, location_2 = completionData.location;
+                // Find the symbol with the matching entry name.
+                var target_2 = program.getCompilerOptions().target;
+                // We don't need to perform character checks here because we're only comparing the
+                // name against 'entryName' (which is known to be good), not building a new
+                // completion entry.
+                var symbol = ts.forEach(symbols, function (s) { return getCompletionEntryDisplayNameForSymbol(s, target_2, /*performCharacterChecks*/ false, location_2) === entryName ? s : undefined; });
+                if (symbol) {
+                    var _a = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, getValidSourceFile(fileName), location_2, location_2, 7 /* All */), displayParts = _a.displayParts, documentation = _a.documentation, symbolKind = _a.symbolKind;
+                    return {
+                        name: entryName,
+                        kindModifiers: getSymbolModifiers(symbol),
+                        kind: symbolKind,
+                        displayParts: displayParts,
+                        documentation: documentation
+                    };
+                }
+            }
+            // Didn't find a symbol with this name.  See if we can find a keyword instead.
+            var keywordCompletion = ts.forEach(keywordCompletions, function (c) { return c.name === entryName; });
+            if (keywordCompletion) {
+                return {
+                    name: entryName,
+                    kind: ScriptElementKind.keyword,
+                    kindModifiers: ScriptElementKindModifier.none,
+                    displayParts: [ts.displayPart(entryName, SymbolDisplayPartKind.keyword)],
+                    documentation: undefined
+                };
+            }
+            return undefined;
+        }
+        // TODO(drosen): use contextual SemanticMeaning.
+        function getSymbolKind(symbol, location) {
+            var flags = symbol.getFlags();
+            if (flags & 32 /* Class */)
+                return ts.getDeclarationOfKind(symbol, 192 /* ClassExpression */) ?
+                    ScriptElementKind.localClassElement : ScriptElementKind.classElement;
+            if (flags & 384 /* Enum */)
+                return ScriptElementKind.enumElement;
+            if (flags & 524288 /* TypeAlias */)
+                return ScriptElementKind.typeElement;
+            if (flags & 64 /* Interface */)
+                return ScriptElementKind.interfaceElement;
+            if (flags & 262144 /* TypeParameter */)
+                return ScriptElementKind.typeParameterElement;
+            var result = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location);
+            if (result === ScriptElementKind.unknown) {
+                if (flags & 262144 /* TypeParameter */)
+                    return ScriptElementKind.typeParameterElement;
+                if (flags & 8 /* EnumMember */)
+                    return ScriptElementKind.variableElement;
+                if (flags & 8388608 /* Alias */)
+                    return ScriptElementKind.alias;
+                if (flags & 1536 /* Module */)
+                    return ScriptElementKind.moduleElement;
+            }
+            return result;
+        }
+        function getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, flags, location) {
+            var typeChecker = program.getTypeChecker();
+            if (typeChecker.isUndefinedSymbol(symbol)) {
+                return ScriptElementKind.variableElement;
+            }
+            if (typeChecker.isArgumentsSymbol(symbol)) {
+                return ScriptElementKind.localVariableElement;
+            }
+            if (location.kind === 97 /* ThisKeyword */ && ts.isExpression(location)) {
+                return ScriptElementKind.parameterElement;
+            }
+            if (flags & 3 /* Variable */) {
+                if (ts.isFirstDeclarationOfSymbolParameter(symbol)) {
+                    return ScriptElementKind.parameterElement;
+                }
+                else if (symbol.valueDeclaration && ts.isConst(symbol.valueDeclaration)) {
+                    return ScriptElementKind.constElement;
+                }
+                else if (ts.forEach(symbol.declarations, ts.isLet)) {
+                    return ScriptElementKind.letElement;
+                }
+                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localVariableElement : ScriptElementKind.variableElement;
+            }
+            if (flags & 16 /* Function */)
+                return isLocalVariableOrFunction(symbol) ? ScriptElementKind.localFunctionElement : ScriptElementKind.functionElement;
+            if (flags & 32768 /* GetAccessor */)
+                return ScriptElementKind.memberGetAccessorElement;
+            if (flags & 65536 /* SetAccessor */)
+                return ScriptElementKind.memberSetAccessorElement;
+            if (flags & 8192 /* Method */)
+                return ScriptElementKind.memberFunctionElement;
+            if (flags & 16384 /* Constructor */)
+                return ScriptElementKind.constructorImplementationElement;
+            if (flags & 4 /* Property */) {
+                if (flags & 268435456 /* SyntheticProperty */) {
+                    // If union property is result of union of non method (property/accessors/variables), it is labeled as property
+                    var unionPropertyKind = ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
+                        var rootSymbolFlags = rootSymbol.getFlags();
+                        if (rootSymbolFlags & (98308 /* PropertyOrAccessor */ | 3 /* Variable */)) {
+                            return ScriptElementKind.memberVariableElement;
+                        }
+                        ts.Debug.assert(!!(rootSymbolFlags & 8192 /* Method */));
+                    });
+                    if (!unionPropertyKind) {
+                        // If this was union of all methods,
+                        // make sure it has call signatures before we can label it as method
+                        var typeOfUnionProperty = typeChecker.getTypeOfSymbolAtLocation(symbol, location);
+                        if (typeOfUnionProperty.getCallSignatures().length) {
+                            return ScriptElementKind.memberFunctionElement;
+                        }
+                        return ScriptElementKind.memberVariableElement;
+                    }
+                    return unionPropertyKind;
+                }
+                return ScriptElementKind.memberVariableElement;
+            }
+            return ScriptElementKind.unknown;
+        }
+        function getSymbolModifiers(symbol) {
+            return symbol && symbol.declarations && symbol.declarations.length > 0
+                ? ts.getNodeModifiers(symbol.declarations[0])
+                : ScriptElementKindModifier.none;
+        }
+        // TODO(drosen): Currently completion entry details passes the SemanticMeaning.All instead of using semanticMeaning of location
+        function getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, enclosingDeclaration, location, semanticMeaning) {
+            if (semanticMeaning === void 0) { semanticMeaning = getMeaningFromLocation(location); }
+            var typeChecker = program.getTypeChecker();
+            var displayParts = [];
+            var documentation;
+            var symbolFlags = symbol.flags;
+            var symbolKind = getSymbolKindOfConstructorPropertyMethodAccessorFunctionOrVar(symbol, symbolFlags, location);
+            var hasAddedSymbolInfo;
+            var isThisExpression = location.kind === 97 /* ThisKeyword */ && ts.isExpression(location);
+            var type;
+            // Class at constructor site need to be shown as constructor apart from property,method, vars
+            if (symbolKind !== ScriptElementKind.unknown || symbolFlags & 32 /* Class */ || symbolFlags & 8388608 /* Alias */) {
+                // If it is accessor they are allowed only if location is at name of the accessor
+                if (symbolKind === ScriptElementKind.memberGetAccessorElement || symbolKind === ScriptElementKind.memberSetAccessorElement) {
+                    symbolKind = ScriptElementKind.memberVariableElement;
+                }
+                var signature = void 0;
+                type = isThisExpression ? typeChecker.getTypeAtLocation(location) : typeChecker.getTypeOfSymbolAtLocation(symbol, location);
+                if (type) {
+                    if (location.parent && location.parent.kind === 172 /* PropertyAccessExpression */) {
+                        var right = location.parent.name;
+                        // Either the location is on the right of a property access, or on the left and the right is missing
+                        if (right === location || (right && right.getFullWidth() === 0)) {
+                            location = location.parent;
+                        }
+                    }
+                    // try get the call/construct signature from the type if it matches
+                    var callExpression = void 0;
+                    if (location.kind === 174 /* CallExpression */ || location.kind === 175 /* NewExpression */) {
+                        callExpression = location;
+                    }
+                    else if (isCallExpressionTarget(location) || isNewExpressionTarget(location)) {
+                        callExpression = location.parent;
+                    }
+                    if (callExpression) {
+                        var candidateSignatures = [];
+                        signature = typeChecker.getResolvedSignature(callExpression, candidateSignatures);
+                        if (!signature && candidateSignatures.length) {
+                            // Use the first candidate:
+                            signature = candidateSignatures[0];
+                        }
+                        var useConstructSignatures = callExpression.kind === 175 /* NewExpression */ || callExpression.expression.kind === 95 /* SuperKeyword */;
+                        var allSignatures = useConstructSignatures ? type.getConstructSignatures() : type.getCallSignatures();
+                        if (!ts.contains(allSignatures, signature.target) && !ts.contains(allSignatures, signature)) {
+                            // Get the first signature if there is one -- allSignatures may contain
+                            // either the original signature or its target, so check for either
+                            signature = allSignatures.length ? allSignatures[0] : undefined;
+                        }
+                        if (signature) {
+                            if (useConstructSignatures && (symbolFlags & 32 /* Class */)) {
+                                // Constructor
+                                symbolKind = ScriptElementKind.constructorImplementationElement;
+                                addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
+                            }
+                            else if (symbolFlags & 8388608 /* Alias */) {
+                                symbolKind = ScriptElementKind.alias;
+                                pushTypePart(symbolKind);
+                                displayParts.push(ts.spacePart());
+                                if (useConstructSignatures) {
+                                    displayParts.push(ts.keywordPart(92 /* NewKeyword */));
+                                    displayParts.push(ts.spacePart());
+                                }
+                                addFullSymbolName(symbol);
+                            }
+                            else {
+                                addPrefixForAnyFunctionOrVar(symbol, symbolKind);
+                            }
+                            switch (symbolKind) {
+                                case ScriptElementKind.memberVariableElement:
+                                case ScriptElementKind.variableElement:
+                                case ScriptElementKind.constElement:
+                                case ScriptElementKind.letElement:
+                                case ScriptElementKind.parameterElement:
+                                case ScriptElementKind.localVariableElement:
+                                    // If it is call or construct signature of lambda's write type name
+                                    displayParts.push(ts.punctuationPart(54 /* ColonToken */));
+                                    displayParts.push(ts.spacePart());
+                                    if (useConstructSignatures) {
+                                        displayParts.push(ts.keywordPart(92 /* NewKeyword */));
+                                        displayParts.push(ts.spacePart());
+                                    }
+                                    if (!(type.flags & 65536 /* Anonymous */) && type.symbol) {
+                                        ts.addRange(displayParts, ts.symbolToDisplayParts(typeChecker, type.symbol, enclosingDeclaration, /*meaning*/ undefined, 1 /* WriteTypeParametersOrArguments */));
+                                    }
+                                    addSignatureDisplayParts(signature, allSignatures, 8 /* WriteArrowStyleSignature */);
+                                    break;
+                                default:
+                                    // Just signature
+                                    addSignatureDisplayParts(signature, allSignatures);
+                            }
+                            hasAddedSymbolInfo = true;
+                        }
+                    }
+                    else if ((isNameOfFunctionDeclaration(location) && !(symbol.flags & 98304 /* Accessor */)) ||
+                        (location.kind === 121 /* ConstructorKeyword */ && location.parent.kind === 148 /* Constructor */)) {
+                        // get the signature from the declaration and write it
+                        var functionDeclaration = location.parent;
+                        var allSignatures = functionDeclaration.kind === 148 /* Constructor */ ? type.getNonNullableType().getConstructSignatures() : type.getNonNullableType().getCallSignatures();
+                        if (!typeChecker.isImplementationOfOverload(functionDeclaration)) {
+                            signature = typeChecker.getSignatureFromDeclaration(functionDeclaration);
+                        }
+                        else {
+                            signature = allSignatures[0];
+                        }
+                        if (functionDeclaration.kind === 148 /* Constructor */) {
+                            // show (constructor) Type(...) signature
+                            symbolKind = ScriptElementKind.constructorImplementationElement;
+                            addPrefixForAnyFunctionOrVar(type.symbol, symbolKind);
+                        }
+                        else {
+                            // (function/method) symbol(..signature)
+                            addPrefixForAnyFunctionOrVar(functionDeclaration.kind === 151 /* CallSignature */ &&
+                                !(type.symbol.flags & 2048 /* TypeLiteral */ || type.symbol.flags & 4096 /* ObjectLiteral */) ? type.symbol : symbol, symbolKind);
+                        }
+                        addSignatureDisplayParts(signature, allSignatures);
+                        hasAddedSymbolInfo = true;
+                    }
+                }
+            }
+            if (symbolFlags & 32 /* Class */ && !hasAddedSymbolInfo && !isThisExpression) {
+                if (ts.getDeclarationOfKind(symbol, 192 /* ClassExpression */)) {
+                    // Special case for class expressions because we would like to indicate that
+                    // the class name is local to the class body (similar to function expression)
+                    //      (local class) class <className>
+                    pushTypePart(ScriptElementKind.localClassElement);
+                }
+                else {
+                    // Class declaration has name which is not local.
+                    displayParts.push(ts.keywordPart(73 /* ClassKeyword */));
+                }
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                writeTypeParametersOfSymbol(symbol, sourceFile);
+            }
+            if ((symbolFlags & 64 /* Interface */) && (semanticMeaning & 2 /* Type */)) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.keywordPart(107 /* InterfaceKeyword */));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                writeTypeParametersOfSymbol(symbol, sourceFile);
+            }
+            if (symbolFlags & 524288 /* TypeAlias */) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.keywordPart(134 /* TypeKeyword */));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                writeTypeParametersOfSymbol(symbol, sourceFile);
+                displayParts.push(ts.spacePart());
+                displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                displayParts.push(ts.spacePart());
+                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, typeChecker.getDeclaredTypeOfSymbol(symbol), enclosingDeclaration));
+            }
+            if (symbolFlags & 384 /* Enum */) {
+                addNewLineIfDisplayPartsExist();
+                if (ts.forEach(symbol.declarations, ts.isConstEnumDeclaration)) {
+                    displayParts.push(ts.keywordPart(74 /* ConstKeyword */));
+                    displayParts.push(ts.spacePart());
+                }
+                displayParts.push(ts.keywordPart(81 /* EnumKeyword */));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+            }
+            if (symbolFlags & 1536 /* Module */) {
+                addNewLineIfDisplayPartsExist();
+                var declaration = ts.getDeclarationOfKind(symbol, 225 /* ModuleDeclaration */);
+                var isNamespace = declaration && declaration.name && declaration.name.kind === 69 /* Identifier */;
+                displayParts.push(ts.keywordPart(isNamespace ? 126 /* NamespaceKeyword */ : 125 /* ModuleKeyword */));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+            }
+            if ((symbolFlags & 262144 /* TypeParameter */) && (semanticMeaning & 2 /* Type */)) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                displayParts.push(ts.textPart("type parameter"));
+                displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                displayParts.push(ts.spacePart());
+                displayParts.push(ts.keywordPart(90 /* InKeyword */));
+                displayParts.push(ts.spacePart());
+                if (symbol.parent) {
+                    // Class/Interface type parameter
+                    addFullSymbolName(symbol.parent, enclosingDeclaration);
+                    writeTypeParametersOfSymbol(symbol.parent, enclosingDeclaration);
+                }
+                else {
+                    // Method/function type parameter
+                    var declaration = ts.getDeclarationOfKind(symbol, 141 /* TypeParameter */);
+                    ts.Debug.assert(declaration !== undefined);
+                    declaration = declaration.parent;
+                    if (declaration) {
+                        if (ts.isFunctionLikeKind(declaration.kind)) {
+                            var signature = typeChecker.getSignatureFromDeclaration(declaration);
+                            if (declaration.kind === 152 /* ConstructSignature */) {
+                                displayParts.push(ts.keywordPart(92 /* NewKeyword */));
+                                displayParts.push(ts.spacePart());
+                            }
+                            else if (declaration.kind !== 151 /* CallSignature */ && declaration.name) {
+                                addFullSymbolName(declaration.symbol);
+                            }
+                            ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, sourceFile, 32 /* WriteTypeArgumentsOfSignature */));
+                        }
+                        else {
+                            // Type alias type parameter
+                            // For example
+                            //      type list<T> = T[];  // Both T will go through same code path
+                            displayParts.push(ts.keywordPart(134 /* TypeKeyword */));
+                            displayParts.push(ts.spacePart());
+                            addFullSymbolName(declaration.symbol);
+                            writeTypeParametersOfSymbol(declaration.symbol, sourceFile);
+                        }
+                    }
+                }
+            }
+            if (symbolFlags & 8 /* EnumMember */) {
+                addPrefixForAnyFunctionOrVar(symbol, "enum member");
+                var declaration = symbol.declarations[0];
+                if (declaration.kind === 255 /* EnumMember */) {
+                    var constantValue = typeChecker.getConstantValue(declaration);
+                    if (constantValue !== undefined) {
+                        displayParts.push(ts.spacePart());
+                        displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                        displayParts.push(ts.spacePart());
+                        displayParts.push(ts.displayPart(constantValue.toString(), SymbolDisplayPartKind.numericLiteral));
+                    }
+                }
+            }
+            if (symbolFlags & 8388608 /* Alias */) {
+                addNewLineIfDisplayPartsExist();
+                displayParts.push(ts.keywordPart(89 /* ImportKeyword */));
+                displayParts.push(ts.spacePart());
+                addFullSymbolName(symbol);
+                ts.forEach(symbol.declarations, function (declaration) {
+                    if (declaration.kind === 229 /* ImportEqualsDeclaration */) {
+                        var importEqualsDeclaration = declaration;
+                        if (ts.isExternalModuleImportEqualsDeclaration(importEqualsDeclaration)) {
+                            displayParts.push(ts.spacePart());
+                            displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                            displayParts.push(ts.spacePart());
+                            displayParts.push(ts.keywordPart(129 /* RequireKeyword */));
+                            displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                            displayParts.push(ts.displayPart(ts.getTextOfNode(ts.getExternalModuleImportEqualsDeclarationExpression(importEqualsDeclaration)), SymbolDisplayPartKind.stringLiteral));
+                            displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                        }
+                        else {
+                            var internalAliasSymbol = typeChecker.getSymbolAtLocation(importEqualsDeclaration.moduleReference);
+                            if (internalAliasSymbol) {
+                                displayParts.push(ts.spacePart());
+                                displayParts.push(ts.operatorPart(56 /* EqualsToken */));
+                                displayParts.push(ts.spacePart());
+                                addFullSymbolName(internalAliasSymbol, enclosingDeclaration);
+                            }
+                        }
+                        return true;
+                    }
+                });
+            }
+            if (!hasAddedSymbolInfo) {
+                if (symbolKind !== ScriptElementKind.unknown) {
+                    if (type) {
+                        if (isThisExpression) {
+                            addNewLineIfDisplayPartsExist();
+                            displayParts.push(ts.keywordPart(97 /* ThisKeyword */));
+                        }
+                        else {
+                            addPrefixForAnyFunctionOrVar(symbol, symbolKind);
+                        }
+                        // For properties, variables and local vars: show the type
+                        if (symbolKind === ScriptElementKind.memberVariableElement ||
+                            symbolFlags & 3 /* Variable */ ||
+                            symbolKind === ScriptElementKind.localVariableElement ||
+                            isThisExpression) {
+                            displayParts.push(ts.punctuationPart(54 /* ColonToken */));
+                            displayParts.push(ts.spacePart());
+                            // If the type is type parameter, format it specially
+                            if (type.symbol && type.symbol.flags & 262144 /* TypeParameter */) {
+                                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
+                                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplay(type, writer, enclosingDeclaration);
+                                });
+                                ts.addRange(displayParts, typeParameterParts);
+                            }
+                            else {
+                                ts.addRange(displayParts, ts.typeToDisplayParts(typeChecker, type, enclosingDeclaration));
+                            }
+                        }
+                        else if (symbolFlags & 16 /* Function */ ||
+                            symbolFlags & 8192 /* Method */ ||
+                            symbolFlags & 16384 /* Constructor */ ||
+                            symbolFlags & 131072 /* Signature */ ||
+                            symbolFlags & 98304 /* Accessor */ ||
+                            symbolKind === ScriptElementKind.memberFunctionElement) {
+                            var allSignatures = type.getNonNullableType().getCallSignatures();
+                            addSignatureDisplayParts(allSignatures[0], allSignatures);
+                        }
+                    }
+                }
+                else {
+                    symbolKind = getSymbolKind(symbol, location);
+                }
+            }
+            if (!documentation) {
+                documentation = symbol.getDocumentationComment();
+            }
+            return { displayParts: displayParts, documentation: documentation, symbolKind: symbolKind };
+            function addNewLineIfDisplayPartsExist() {
+                if (displayParts.length) {
+                    displayParts.push(ts.lineBreakPart());
+                }
+            }
+            function addFullSymbolName(symbol, enclosingDeclaration) {
+                var fullSymbolDisplayParts = ts.symbolToDisplayParts(typeChecker, symbol, enclosingDeclaration || sourceFile, /*meaning*/ undefined, 1 /* WriteTypeParametersOrArguments */ | 2 /* UseOnlyExternalAliasing */);
+                ts.addRange(displayParts, fullSymbolDisplayParts);
+            }
+            function addPrefixForAnyFunctionOrVar(symbol, symbolKind) {
+                addNewLineIfDisplayPartsExist();
+                if (symbolKind) {
+                    pushTypePart(symbolKind);
+                    displayParts.push(ts.spacePart());
+                    addFullSymbolName(symbol);
+                }
+            }
+            function pushTypePart(symbolKind) {
+                switch (symbolKind) {
+                    case ScriptElementKind.variableElement:
+                    case ScriptElementKind.functionElement:
+                    case ScriptElementKind.letElement:
+                    case ScriptElementKind.constElement:
+                    case ScriptElementKind.constructorImplementationElement:
+                        displayParts.push(ts.textOrKeywordPart(symbolKind));
+                        return;
+                    default:
+                        displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                        displayParts.push(ts.textOrKeywordPart(symbolKind));
+                        displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                        return;
+                }
+            }
+            function addSignatureDisplayParts(signature, allSignatures, flags) {
+                ts.addRange(displayParts, ts.signatureToDisplayParts(typeChecker, signature, enclosingDeclaration, flags | 32 /* WriteTypeArgumentsOfSignature */));
+                if (allSignatures.length > 1) {
+                    displayParts.push(ts.spacePart());
+                    displayParts.push(ts.punctuationPart(17 /* OpenParenToken */));
+                    displayParts.push(ts.operatorPart(35 /* PlusToken */));
+                    displayParts.push(ts.displayPart((allSignatures.length - 1).toString(), SymbolDisplayPartKind.numericLiteral));
+                    displayParts.push(ts.spacePart());
+                    displayParts.push(ts.textPart(allSignatures.length === 2 ? "overload" : "overloads"));
+                    displayParts.push(ts.punctuationPart(18 /* CloseParenToken */));
+                }
+                documentation = signature.getDocumentationComment();
+            }
+            function writeTypeParametersOfSymbol(symbol, enclosingDeclaration) {
+                var typeParameterParts = ts.mapToDisplayParts(function (writer) {
+                    typeChecker.getSymbolDisplayBuilder().buildTypeParameterDisplayFromSymbol(symbol, writer, enclosingDeclaration);
+                });
+                ts.addRange(displayParts, typeParameterParts);
+            }
+        }
+        function getQuickInfoAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, position);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            if (isLabelName(node)) {
+                return undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol || typeChecker.isUnknownSymbol(symbol)) {
+                // Try getting just type at this position and show
+                switch (node.kind) {
+                    case 69 /* Identifier */:
+                    case 172 /* PropertyAccessExpression */:
+                    case 139 /* QualifiedName */:
+                    case 97 /* ThisKeyword */:
+                    case 165 /* ThisType */:
+                    case 95 /* SuperKeyword */:
+                        // For the identifiers/this/super etc get the type at position
+                        var type = typeChecker.getTypeAtLocation(node);
+                        if (type) {
+                            return {
+                                kind: ScriptElementKind.unknown,
+                                kindModifiers: ScriptElementKindModifier.none,
+                                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
+                                displayParts: ts.typeToDisplayParts(typeChecker, type, getContainerNode(node)),
+                                documentation: type.symbol ? type.symbol.getDocumentationComment() : undefined
+                            };
+                        }
+                }
+                return undefined;
+            }
+            var displayPartsDocumentationsAndKind = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, sourceFile, getContainerNode(node), node);
+            return {
+                kind: displayPartsDocumentationsAndKind.symbolKind,
+                kindModifiers: getSymbolModifiers(symbol),
+                textSpan: ts.createTextSpan(node.getStart(), node.getWidth()),
+                displayParts: displayPartsDocumentationsAndKind.displayParts,
+                documentation: displayPartsDocumentationsAndKind.documentation
+            };
+        }
+        function createDefinitionInfo(node, symbolKind, symbolName, containerName) {
+            return {
+                fileName: node.getSourceFile().fileName,
+                textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd()),
+                kind: symbolKind,
+                name: symbolName,
+                containerKind: undefined,
+                containerName: containerName
+            };
+        }
+        function getDefinitionFromSymbol(symbol, node) {
+            var typeChecker = program.getTypeChecker();
+            var result = [];
+            var declarations = symbol.getDeclarations();
+            var symbolName = typeChecker.symbolToString(symbol); // Do not get scoped name, just the name of the symbol
+            var symbolKind = getSymbolKind(symbol, node);
+            var containerSymbol = symbol.parent;
+            var containerName = containerSymbol ? typeChecker.symbolToString(containerSymbol, node) : "";
+            if (!tryAddConstructSignature(symbol, node, symbolKind, symbolName, containerName, result) &&
+                !tryAddCallSignature(symbol, node, symbolKind, symbolName, containerName, result)) {
+                // Just add all the declarations.
+                ts.forEach(declarations, function (declaration) {
+                    result.push(createDefinitionInfo(declaration, symbolKind, symbolName, containerName));
+                });
+            }
+            return result;
+            function tryAddConstructSignature(symbol, location, symbolKind, symbolName, containerName, result) {
+                // Applicable only if we are in a new expression, or we are on a constructor declaration
+                // and in either case the symbol has a construct signature definition, i.e. class
+                if (isNewExpressionTarget(location) || location.kind === 121 /* ConstructorKeyword */) {
+                    if (symbol.flags & 32 /* Class */) {
+                        // Find the first class-like declaration and try to get the construct signature.
+                        for (var _i = 0, _a = symbol.getDeclarations(); _i < _a.length; _i++) {
+                            var declaration = _a[_i];
+                            if (ts.isClassLike(declaration)) {
+                                return tryAddSignature(declaration.members, 
+                                /*selectConstructors*/ true, symbolKind, symbolName, containerName, result);
+                            }
+                        }
+                        ts.Debug.fail("Expected declaration to have at least one class-like declaration");
+                    }
+                }
+                return false;
+            }
+            function tryAddCallSignature(symbol, location, symbolKind, symbolName, containerName, result) {
+                if (isCallExpressionTarget(location) || isNewExpressionTarget(location) || isNameOfFunctionDeclaration(location)) {
+                    return tryAddSignature(symbol.declarations, /*selectConstructors*/ false, symbolKind, symbolName, containerName, result);
+                }
+                return false;
+            }
+            function tryAddSignature(signatureDeclarations, selectConstructors, symbolKind, symbolName, containerName, result) {
+                var declarations = [];
+                var definition;
+                ts.forEach(signatureDeclarations, function (d) {
+                    if ((selectConstructors && d.kind === 148 /* Constructor */) ||
+                        (!selectConstructors && (d.kind === 220 /* FunctionDeclaration */ || d.kind === 147 /* MethodDeclaration */ || d.kind === 146 /* MethodSignature */))) {
+                        declarations.push(d);
+                        if (d.body)
+                            definition = d;
+                    }
+                });
+                if (definition) {
+                    result.push(createDefinitionInfo(definition, symbolKind, symbolName, containerName));
+                    return true;
+                }
+                else if (declarations.length) {
+                    result.push(createDefinitionInfo(ts.lastOrUndefined(declarations), symbolKind, symbolName, containerName));
+                    return true;
+                }
+                return false;
+            }
+        }
+        function findReferenceInPosition(refs, pos) {
+            for (var _i = 0, refs_1 = refs; _i < refs_1.length; _i++) {
+                var ref = refs_1[_i];
+                if (ref.pos <= pos && pos < ref.end) {
+                    return ref;
+                }
+            }
+            return undefined;
+        }
+        function getDefinitionInfoForFileReference(name, targetFileName) {
+            return {
+                fileName: targetFileName,
+                textSpan: ts.createTextSpanFromBounds(0, 0),
+                kind: ScriptElementKind.scriptElement,
+                name: name,
+                containerName: undefined,
+                containerKind: undefined
+            };
+        }
+        /// Goto definition
+        function getDefinitionAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            /// Triple slash reference comments
+            var comment = findReferenceInPosition(sourceFile.referencedFiles, position);
+            if (comment) {
+                var referenceFile = ts.tryResolveScriptReference(program, sourceFile, comment);
+                if (referenceFile) {
+                    return [getDefinitionInfoForFileReference(comment.fileName, referenceFile.fileName)];
+                }
+                return undefined;
+            }
+            // Type reference directives
+            var typeReferenceDirective = findReferenceInPosition(sourceFile.typeReferenceDirectives, position);
+            if (typeReferenceDirective) {
+                var referenceFile = ts.lookUp(program.getResolvedTypeReferenceDirectives(), typeReferenceDirective.fileName);
+                if (referenceFile && referenceFile.resolvedFileName) {
+                    return [getDefinitionInfoForFileReference(typeReferenceDirective.fileName, referenceFile.resolvedFileName)];
+                }
+                return undefined;
+            }
+            var node = ts.getTouchingPropertyName(sourceFile, position);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            // Labels
+            if (isJumpStatementTarget(node)) {
+                var labelName = node.text;
+                var label = getTargetLabel(node.parent, node.text);
+                return label ? [createDefinitionInfo(label, ScriptElementKind.label, labelName, /*containerName*/ undefined)] : undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            // Could not find a symbol e.g. node is string or number keyword,
+            // or the symbol was an internal symbol and does not have a declaration e.g. undefined symbol
+            if (!symbol) {
+                return undefined;
+            }
+            // If this is an alias, and the request came at the declaration location
+            // get the aliased symbol instead. This allows for goto def on an import e.g.
+            //   import {A, B} from "mod";
+            // to jump to the implementation directly.
+            if (symbol.flags & 8388608 /* Alias */) {
+                var declaration = symbol.declarations[0];
+                // Go to the original declaration for cases:
+                //
+                //   (1) when the aliased symbol was declared in the location(parent).
+                //   (2) when the aliased symbol is originating from a named import.
+                //
+                if (node.kind === 69 /* Identifier */ &&
+                    (node.parent === declaration ||
+                        (declaration.kind === 234 /* ImportSpecifier */ && declaration.parent && declaration.parent.kind === 233 /* NamedImports */))) {
+                    symbol = typeChecker.getAliasedSymbol(symbol);
+                }
+            }
+            // Because name in short-hand property assignment has two different meanings: property name and property value,
+            // using go-to-definition at such position should go to the variable declaration of the property value rather than
+            // go to the declaration of the property name (in this case stay at the same position). However, if go-to-definition
+            // is performed at the location of property access, we would like to go to definition of the property in the short-hand
+            // assignment. This case and others are handled by the following code.
+            if (node.parent.kind === 254 /* ShorthandPropertyAssignment */) {
+                var shorthandSymbol = typeChecker.getShorthandAssignmentValueSymbol(symbol.valueDeclaration);
+                if (!shorthandSymbol) {
+                    return [];
+                }
+                var shorthandDeclarations = shorthandSymbol.getDeclarations();
+                var shorthandSymbolKind_1 = getSymbolKind(shorthandSymbol, node);
+                var shorthandSymbolName_1 = typeChecker.symbolToString(shorthandSymbol);
+                var shorthandContainerName_1 = typeChecker.symbolToString(symbol.parent, node);
+                return ts.map(shorthandDeclarations, function (declaration) { return createDefinitionInfo(declaration, shorthandSymbolKind_1, shorthandSymbolName_1, shorthandContainerName_1); });
+            }
+            return getDefinitionFromSymbol(symbol, node);
+        }
+        /// Goto type
+        function getTypeDefinitionAtPosition(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, position);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            var typeChecker = program.getTypeChecker();
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol) {
+                return undefined;
+            }
+            var type = typeChecker.getTypeOfSymbolAtLocation(symbol, node);
+            if (!type) {
+                return undefined;
+            }
+            if (type.flags & 16384 /* Union */) {
+                var result_3 = [];
+                ts.forEach(type.types, function (t) {
+                    if (t.symbol) {
+                        ts.addRange(/*to*/ result_3, /*from*/ getDefinitionFromSymbol(t.symbol, node));
+                    }
+                });
+                return result_3;
+            }
+            if (!type.symbol) {
+                return undefined;
+            }
+            return getDefinitionFromSymbol(type.symbol, node);
+        }
+        function getOccurrencesAtPosition(fileName, position) {
+            var results = getOccurrencesAtPositionCore(fileName, position);
+            if (results) {
+                var sourceFile_1 = getCanonicalFileName(ts.normalizeSlashes(fileName));
+                // Get occurrences only supports reporting occurrences for the file queried.  So
+                // filter down to that list.
+                results = ts.filter(results, function (r) { return getCanonicalFileName(ts.normalizeSlashes(r.fileName)) === sourceFile_1; });
+            }
+            return results;
+        }
+        function getDocumentHighlights(fileName, position, filesToSearch) {
+            synchronizeHostData();
+            var sourceFilesToSearch = ts.map(filesToSearch, function (f) { return program.getSourceFile(f); });
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingWord(sourceFile, position);
+            if (!node) {
+                return undefined;
+            }
+            return getSemanticDocumentHighlights(node) || getSyntacticDocumentHighlights(node);
+            function getHighlightSpanForNode(node) {
+                var start = node.getStart();
+                var end = node.getEnd();
+                return {
+                    fileName: sourceFile.fileName,
+                    textSpan: ts.createTextSpanFromBounds(start, end),
+                    kind: HighlightSpanKind.none
+                };
+            }
+            function getSemanticDocumentHighlights(node) {
+                if (node.kind === 69 /* Identifier */ ||
+                    node.kind === 97 /* ThisKeyword */ ||
+                    node.kind === 165 /* ThisType */ ||
+                    node.kind === 95 /* SuperKeyword */ ||
+                    node.kind === 9 /* StringLiteral */ ||
+                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                    var referencedSymbols = getReferencedSymbolsForNode(node, sourceFilesToSearch, /*findInStrings*/ false, /*findInComments*/ false);
+                    return convertReferencedSymbols(referencedSymbols);
+                }
+                return undefined;
+                function convertReferencedSymbols(referencedSymbols) {
+                    if (!referencedSymbols) {
+                        return undefined;
+                    }
+                    var fileNameToDocumentHighlights = {};
+                    var result = [];
+                    for (var _i = 0, referencedSymbols_1 = referencedSymbols; _i < referencedSymbols_1.length; _i++) {
+                        var referencedSymbol = referencedSymbols_1[_i];
+                        for (var _a = 0, _b = referencedSymbol.references; _a < _b.length; _a++) {
+                            var referenceEntry = _b[_a];
+                            var fileName_1 = referenceEntry.fileName;
+                            var documentHighlights = ts.getProperty(fileNameToDocumentHighlights, fileName_1);
+                            if (!documentHighlights) {
+                                documentHighlights = { fileName: fileName_1, highlightSpans: [] };
+                                fileNameToDocumentHighlights[fileName_1] = documentHighlights;
+                                result.push(documentHighlights);
+                            }
+                            documentHighlights.highlightSpans.push({
+                                textSpan: referenceEntry.textSpan,
+                                kind: referenceEntry.isWriteAccess ? HighlightSpanKind.writtenReference : HighlightSpanKind.reference
+                            });
+                        }
+                    }
+                    return result;
+                }
+            }
+            function getSyntacticDocumentHighlights(node) {
+                var fileName = sourceFile.fileName;
+                var highlightSpans = getHighlightSpans(node);
+                if (!highlightSpans || highlightSpans.length === 0) {
+                    return undefined;
+                }
+                return [{ fileName: fileName, highlightSpans: highlightSpans }];
+                // returns true if 'node' is defined and has a matching 'kind'.
+                function hasKind(node, kind) {
+                    return node !== undefined && node.kind === kind;
+                }
+                // Null-propagating 'parent' function.
+                function parent(node) {
+                    return node && node.parent;
+                }
+                function getHighlightSpans(node) {
+                    if (node) {
+                        switch (node.kind) {
+                            case 88 /* IfKeyword */:
+                            case 80 /* ElseKeyword */:
+                                if (hasKind(node.parent, 203 /* IfStatement */)) {
+                                    return getIfElseOccurrences(node.parent);
+                                }
+                                break;
+                            case 94 /* ReturnKeyword */:
+                                if (hasKind(node.parent, 211 /* ReturnStatement */)) {
+                                    return getReturnOccurrences(node.parent);
+                                }
+                                break;
+                            case 98 /* ThrowKeyword */:
+                                if (hasKind(node.parent, 215 /* ThrowStatement */)) {
+                                    return getThrowOccurrences(node.parent);
+                                }
+                                break;
+                            case 72 /* CatchKeyword */:
+                                if (hasKind(parent(parent(node)), 216 /* TryStatement */)) {
+                                    return getTryCatchFinallyOccurrences(node.parent.parent);
+                                }
+                                break;
+                            case 100 /* TryKeyword */:
+                            case 85 /* FinallyKeyword */:
+                                if (hasKind(parent(node), 216 /* TryStatement */)) {
+                                    return getTryCatchFinallyOccurrences(node.parent);
+                                }
+                                break;
+                            case 96 /* SwitchKeyword */:
+                                if (hasKind(node.parent, 213 /* SwitchStatement */)) {
+                                    return getSwitchCaseDefaultOccurrences(node.parent);
+                                }
+                                break;
+                            case 71 /* CaseKeyword */:
+                            case 77 /* DefaultKeyword */:
+                                if (hasKind(parent(parent(parent(node))), 213 /* SwitchStatement */)) {
+                                    return getSwitchCaseDefaultOccurrences(node.parent.parent.parent);
+                                }
+                                break;
+                            case 70 /* BreakKeyword */:
+                            case 75 /* ContinueKeyword */:
+                                if (hasKind(node.parent, 210 /* BreakStatement */) || hasKind(node.parent, 209 /* ContinueStatement */)) {
+                                    return getBreakOrContinueStatementOccurrences(node.parent);
+                                }
+                                break;
+                            case 86 /* ForKeyword */:
+                                if (hasKind(node.parent, 206 /* ForStatement */) ||
+                                    hasKind(node.parent, 207 /* ForInStatement */) ||
+                                    hasKind(node.parent, 208 /* ForOfStatement */)) {
+                                    return getLoopBreakContinueOccurrences(node.parent);
+                                }
+                                break;
+                            case 104 /* WhileKeyword */:
+                            case 79 /* DoKeyword */:
+                                if (hasKind(node.parent, 205 /* WhileStatement */) || hasKind(node.parent, 204 /* DoStatement */)) {
+                                    return getLoopBreakContinueOccurrences(node.parent);
+                                }
+                                break;
+                            case 121 /* ConstructorKeyword */:
+                                if (hasKind(node.parent, 148 /* Constructor */)) {
+                                    return getConstructorOccurrences(node.parent);
+                                }
+                                break;
+                            case 123 /* GetKeyword */:
+                            case 131 /* SetKeyword */:
+                                if (hasKind(node.parent, 149 /* GetAccessor */) || hasKind(node.parent, 150 /* SetAccessor */)) {
+                                    return getGetAndSetOccurrences(node.parent);
+                                }
+                                break;
+                            default:
+                                if (ts.isModifierKind(node.kind) && node.parent &&
+                                    (ts.isDeclaration(node.parent) || node.parent.kind === 200 /* VariableStatement */)) {
+                                    return getModifierOccurrences(node.kind, node.parent);
+                                }
+                        }
+                    }
+                    return undefined;
+                }
+                /**
+                 * Aggregates all throw-statements within this node *without* crossing
+                 * into function boundaries and try-blocks with catch-clauses.
+                 */
+                function aggregateOwnedThrowStatements(node) {
+                    var statementAccumulator = [];
+                    aggregate(node);
+                    return statementAccumulator;
+                    function aggregate(node) {
+                        if (node.kind === 215 /* ThrowStatement */) {
+                            statementAccumulator.push(node);
+                        }
+                        else if (node.kind === 216 /* TryStatement */) {
+                            var tryStatement = node;
+                            if (tryStatement.catchClause) {
+                                aggregate(tryStatement.catchClause);
+                            }
+                            else {
+                                // Exceptions thrown within a try block lacking a catch clause
+                                // are "owned" in the current context.
+                                aggregate(tryStatement.tryBlock);
+                            }
+                            if (tryStatement.finallyBlock) {
+                                aggregate(tryStatement.finallyBlock);
+                            }
+                        }
+                        else if (!ts.isFunctionLike(node)) {
+                            ts.forEachChild(node, aggregate);
+                        }
+                    }
+                }
+                /**
+                 * For lack of a better name, this function takes a throw statement and returns the
+                 * nearest ancestor that is a try-block (whose try statement has a catch clause),
+                 * function-block, or source file.
+                 */
+                function getThrowStatementOwner(throwStatement) {
+                    var child = throwStatement;
+                    while (child.parent) {
+                        var parent_19 = child.parent;
+                        if (ts.isFunctionBlock(parent_19) || parent_19.kind === 256 /* SourceFile */) {
+                            return parent_19;
+                        }
+                        // A throw-statement is only owned by a try-statement if the try-statement has
+                        // a catch clause, and if the throw-statement occurs within the try block.
+                        if (parent_19.kind === 216 /* TryStatement */) {
+                            var tryStatement = parent_19;
+                            if (tryStatement.tryBlock === child && tryStatement.catchClause) {
+                                return child;
+                            }
+                        }
+                        child = parent_19;
+                    }
+                    return undefined;
+                }
+                function aggregateAllBreakAndContinueStatements(node) {
+                    var statementAccumulator = [];
+                    aggregate(node);
+                    return statementAccumulator;
+                    function aggregate(node) {
+                        if (node.kind === 210 /* BreakStatement */ || node.kind === 209 /* ContinueStatement */) {
+                            statementAccumulator.push(node);
+                        }
+                        else if (!ts.isFunctionLike(node)) {
+                            ts.forEachChild(node, aggregate);
+                        }
+                    }
+                }
+                function ownsBreakOrContinueStatement(owner, statement) {
+                    var actualOwner = getBreakOrContinueOwner(statement);
+                    return actualOwner && actualOwner === owner;
+                }
+                function getBreakOrContinueOwner(statement) {
+                    for (var node_1 = statement.parent; node_1; node_1 = node_1.parent) {
+                        switch (node_1.kind) {
+                            case 213 /* SwitchStatement */:
+                                if (statement.kind === 209 /* ContinueStatement */) {
+                                    continue;
+                                }
+                            // Fall through.
+                            case 206 /* ForStatement */:
+                            case 207 /* ForInStatement */:
+                            case 208 /* ForOfStatement */:
+                            case 205 /* WhileStatement */:
+                            case 204 /* DoStatement */:
+                                if (!statement.label || isLabeledBy(node_1, statement.label.text)) {
+                                    return node_1;
+                                }
+                                break;
+                            default:
+                                // Don't cross function boundaries.
+                                if (ts.isFunctionLike(node_1)) {
+                                    return undefined;
+                                }
+                                break;
+                        }
+                    }
+                    return undefined;
+                }
+                function getModifierOccurrences(modifier, declaration) {
+                    var container = declaration.parent;
+                    // Make sure we only highlight the keyword when it makes sense to do so.
+                    if (ts.isAccessibilityModifier(modifier)) {
+                        if (!(container.kind === 221 /* ClassDeclaration */ ||
+                            container.kind === 192 /* ClassExpression */ ||
+                            (declaration.kind === 142 /* Parameter */ && hasKind(container, 148 /* Constructor */)))) {
+                            return undefined;
+                        }
+                    }
+                    else if (modifier === 113 /* StaticKeyword */) {
+                        if (!(container.kind === 221 /* ClassDeclaration */ || container.kind === 192 /* ClassExpression */)) {
+                            return undefined;
+                        }
+                    }
+                    else if (modifier === 82 /* ExportKeyword */ || modifier === 122 /* DeclareKeyword */) {
+                        if (!(container.kind === 226 /* ModuleBlock */ || container.kind === 256 /* SourceFile */)) {
+                            return undefined;
+                        }
+                    }
+                    else if (modifier === 115 /* AbstractKeyword */) {
+                        if (!(container.kind === 221 /* ClassDeclaration */ || declaration.kind === 221 /* ClassDeclaration */)) {
+                            return undefined;
+                        }
+                    }
+                    else {
+                        // unsupported modifier
+                        return undefined;
+                    }
+                    var keywords = [];
+                    var modifierFlag = getFlagFromModifier(modifier);
+                    var nodes;
+                    switch (container.kind) {
+                        case 226 /* ModuleBlock */:
+                        case 256 /* SourceFile */:
+                            // Container is either a class declaration or the declaration is a classDeclaration
+                            if (modifierFlag & 128 /* Abstract */) {
+                                nodes = declaration.members.concat(declaration);
+                            }
+                            else {
+                                nodes = container.statements;
+                            }
+                            break;
+                        case 148 /* Constructor */:
+                            nodes = container.parameters.concat(container.parent.members);
+                            break;
+                        case 221 /* ClassDeclaration */:
+                        case 192 /* ClassExpression */:
+                            nodes = container.members;
+                            // If we're an accessibility modifier, we're in an instance member and should search
+                            // the constructor's parameter list for instance members as well.
+                            if (modifierFlag & 28 /* AccessibilityModifier */) {
+                                var constructor = ts.forEach(container.members, function (member) {
+                                    return member.kind === 148 /* Constructor */ && member;
+                                });
+                                if (constructor) {
+                                    nodes = nodes.concat(constructor.parameters);
+                                }
+                            }
+                            else if (modifierFlag & 128 /* Abstract */) {
+                                nodes = nodes.concat(container);
+                            }
+                            break;
+                        default:
+                            ts.Debug.fail("Invalid container kind.");
+                    }
+                    ts.forEach(nodes, function (node) {
+                        if (node.modifiers && node.flags & modifierFlag) {
+                            ts.forEach(node.modifiers, function (child) { return pushKeywordIf(keywords, child, modifier); });
+                        }
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                    function getFlagFromModifier(modifier) {
+                        switch (modifier) {
+                            case 112 /* PublicKeyword */:
+                                return 4 /* Public */;
+                            case 110 /* PrivateKeyword */:
+                                return 8 /* Private */;
+                            case 111 /* ProtectedKeyword */:
+                                return 16 /* Protected */;
+                            case 113 /* StaticKeyword */:
+                                return 32 /* Static */;
+                            case 82 /* ExportKeyword */:
+                                return 1 /* Export */;
+                            case 122 /* DeclareKeyword */:
+                                return 2 /* Ambient */;
+                            case 115 /* AbstractKeyword */:
+                                return 128 /* Abstract */;
+                            default:
+                                ts.Debug.fail();
+                        }
+                    }
+                }
+                function pushKeywordIf(keywordList, token) {
+                    var expected = [];
+                    for (var _i = 2; _i < arguments.length; _i++) {
+                        expected[_i - 2] = arguments[_i];
+                    }
+                    if (token && ts.contains(expected, token.kind)) {
+                        keywordList.push(token);
+                        return true;
+                    }
+                    return false;
+                }
+                function getGetAndSetOccurrences(accessorDeclaration) {
+                    var keywords = [];
+                    tryPushAccessorKeyword(accessorDeclaration.symbol, 149 /* GetAccessor */);
+                    tryPushAccessorKeyword(accessorDeclaration.symbol, 150 /* SetAccessor */);
+                    return ts.map(keywords, getHighlightSpanForNode);
+                    function tryPushAccessorKeyword(accessorSymbol, accessorKind) {
+                        var accessor = ts.getDeclarationOfKind(accessorSymbol, accessorKind);
+                        if (accessor) {
+                            ts.forEach(accessor.getChildren(), function (child) { return pushKeywordIf(keywords, child, 123 /* GetKeyword */, 131 /* SetKeyword */); });
+                        }
+                    }
+                }
+                function getConstructorOccurrences(constructorDeclaration) {
+                    var declarations = constructorDeclaration.symbol.getDeclarations();
+                    var keywords = [];
+                    ts.forEach(declarations, function (declaration) {
+                        ts.forEach(declaration.getChildren(), function (token) {
+                            return pushKeywordIf(keywords, token, 121 /* ConstructorKeyword */);
+                        });
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getLoopBreakContinueOccurrences(loopNode) {
+                    var keywords = [];
+                    if (pushKeywordIf(keywords, loopNode.getFirstToken(), 86 /* ForKeyword */, 104 /* WhileKeyword */, 79 /* DoKeyword */)) {
+                        // If we succeeded and got a do-while loop, then start looking for a 'while' keyword.
+                        if (loopNode.kind === 204 /* DoStatement */) {
+                            var loopTokens = loopNode.getChildren();
+                            for (var i = loopTokens.length - 1; i >= 0; i--) {
+                                if (pushKeywordIf(keywords, loopTokens[i], 104 /* WhileKeyword */)) {
+                                    break;
+                                }
+                            }
+                        }
+                    }
+                    var breaksAndContinues = aggregateAllBreakAndContinueStatements(loopNode.statement);
+                    ts.forEach(breaksAndContinues, function (statement) {
+                        if (ownsBreakOrContinueStatement(loopNode, statement)) {
+                            pushKeywordIf(keywords, statement.getFirstToken(), 70 /* BreakKeyword */, 75 /* ContinueKeyword */);
+                        }
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getBreakOrContinueStatementOccurrences(breakOrContinueStatement) {
+                    var owner = getBreakOrContinueOwner(breakOrContinueStatement);
+                    if (owner) {
+                        switch (owner.kind) {
+                            case 206 /* ForStatement */:
+                            case 207 /* ForInStatement */:
+                            case 208 /* ForOfStatement */:
+                            case 204 /* DoStatement */:
+                            case 205 /* WhileStatement */:
+                                return getLoopBreakContinueOccurrences(owner);
+                            case 213 /* SwitchStatement */:
+                                return getSwitchCaseDefaultOccurrences(owner);
+                        }
+                    }
+                    return undefined;
+                }
+                function getSwitchCaseDefaultOccurrences(switchStatement) {
+                    var keywords = [];
+                    pushKeywordIf(keywords, switchStatement.getFirstToken(), 96 /* SwitchKeyword */);
+                    // Go through each clause in the switch statement, collecting the 'case'/'default' keywords.
+                    ts.forEach(switchStatement.caseBlock.clauses, function (clause) {
+                        pushKeywordIf(keywords, clause.getFirstToken(), 71 /* CaseKeyword */, 77 /* DefaultKeyword */);
+                        var breaksAndContinues = aggregateAllBreakAndContinueStatements(clause);
+                        ts.forEach(breaksAndContinues, function (statement) {
+                            if (ownsBreakOrContinueStatement(switchStatement, statement)) {
+                                pushKeywordIf(keywords, statement.getFirstToken(), 70 /* BreakKeyword */);
+                            }
+                        });
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getTryCatchFinallyOccurrences(tryStatement) {
+                    var keywords = [];
+                    pushKeywordIf(keywords, tryStatement.getFirstToken(), 100 /* TryKeyword */);
+                    if (tryStatement.catchClause) {
+                        pushKeywordIf(keywords, tryStatement.catchClause.getFirstToken(), 72 /* CatchKeyword */);
+                    }
+                    if (tryStatement.finallyBlock) {
+                        var finallyKeyword = ts.findChildOfKind(tryStatement, 85 /* FinallyKeyword */, sourceFile);
+                        pushKeywordIf(keywords, finallyKeyword, 85 /* FinallyKeyword */);
+                    }
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getThrowOccurrences(throwStatement) {
+                    var owner = getThrowStatementOwner(throwStatement);
+                    if (!owner) {
+                        return undefined;
+                    }
+                    var keywords = [];
+                    ts.forEach(aggregateOwnedThrowStatements(owner), function (throwStatement) {
+                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98 /* ThrowKeyword */);
+                    });
+                    // If the "owner" is a function, then we equate 'return' and 'throw' statements in their
+                    // ability to "jump out" of the function, and include occurrences for both.
+                    if (ts.isFunctionBlock(owner)) {
+                        ts.forEachReturnStatement(owner, function (returnStatement) {
+                            pushKeywordIf(keywords, returnStatement.getFirstToken(), 94 /* ReturnKeyword */);
+                        });
+                    }
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getReturnOccurrences(returnStatement) {
+                    var func = ts.getContainingFunction(returnStatement);
+                    // If we didn't find a containing function with a block body, bail out.
+                    if (!(func && hasKind(func.body, 199 /* Block */))) {
+                        return undefined;
+                    }
+                    var keywords = [];
+                    ts.forEachReturnStatement(func.body, function (returnStatement) {
+                        pushKeywordIf(keywords, returnStatement.getFirstToken(), 94 /* ReturnKeyword */);
+                    });
+                    // Include 'throw' statements that do not occur within a try block.
+                    ts.forEach(aggregateOwnedThrowStatements(func.body), function (throwStatement) {
+                        pushKeywordIf(keywords, throwStatement.getFirstToken(), 98 /* ThrowKeyword */);
+                    });
+                    return ts.map(keywords, getHighlightSpanForNode);
+                }
+                function getIfElseOccurrences(ifStatement) {
+                    var keywords = [];
+                    // Traverse upwards through all parent if-statements linked by their else-branches.
+                    while (hasKind(ifStatement.parent, 203 /* IfStatement */) && ifStatement.parent.elseStatement === ifStatement) {
+                        ifStatement = ifStatement.parent;
+                    }
+                    // Now traverse back down through the else branches, aggregating if/else keywords of if-statements.
+                    while (ifStatement) {
+                        var children = ifStatement.getChildren();
+                        pushKeywordIf(keywords, children[0], 88 /* IfKeyword */);
+                        // Generally the 'else' keyword is second-to-last, so we traverse backwards.
+                        for (var i = children.length - 1; i >= 0; i--) {
+                            if (pushKeywordIf(keywords, children[i], 80 /* ElseKeyword */)) {
+                                break;
+                            }
+                        }
+                        if (!hasKind(ifStatement.elseStatement, 203 /* IfStatement */)) {
+                            break;
+                        }
+                        ifStatement = ifStatement.elseStatement;
+                    }
+                    var result = [];
+                    // We'd like to highlight else/ifs together if they are only separated by whitespace
+                    // (i.e. the keywords are separated by no comments, no newlines).
+                    for (var i = 0; i < keywords.length; i++) {
+                        if (keywords[i].kind === 80 /* ElseKeyword */ && i < keywords.length - 1) {
+                            var elseKeyword = keywords[i];
+                            var ifKeyword = keywords[i + 1]; // this *should* always be an 'if' keyword.
+                            var shouldCombindElseAndIf = true;
+                            // Avoid recalculating getStart() by iterating backwards.
+                            for (var j = ifKeyword.getStart() - 1; j >= elseKeyword.end; j--) {
+                                if (!ts.isWhiteSpace(sourceFile.text.charCodeAt(j))) {
+                                    shouldCombindElseAndIf = false;
+                                    break;
+                                }
+                            }
+                            if (shouldCombindElseAndIf) {
+                                result.push({
+                                    fileName: fileName,
+                                    textSpan: ts.createTextSpanFromBounds(elseKeyword.getStart(), ifKeyword.end),
+                                    kind: HighlightSpanKind.reference
+                                });
+                                i++; // skip the next keyword
+                                continue;
+                            }
+                        }
+                        // Ordinary case: just highlight the keyword.
+                        result.push(getHighlightSpanForNode(keywords[i]));
+                    }
+                    return result;
+                }
+            }
+        }
+        /// References and Occurrences
+        function getOccurrencesAtPositionCore(fileName, position) {
+            synchronizeHostData();
+            return convertDocumentHighlights(getDocumentHighlights(fileName, position, [fileName]));
+            function convertDocumentHighlights(documentHighlights) {
+                if (!documentHighlights) {
+                    return undefined;
+                }
+                var result = [];
+                for (var _i = 0, documentHighlights_1 = documentHighlights; _i < documentHighlights_1.length; _i++) {
+                    var entry = documentHighlights_1[_i];
+                    for (var _a = 0, _b = entry.highlightSpans; _a < _b.length; _a++) {
+                        var highlightSpan = _b[_a];
+                        result.push({
+                            fileName: entry.fileName,
+                            textSpan: highlightSpan.textSpan,
+                            isWriteAccess: highlightSpan.kind === HighlightSpanKind.writtenReference
+                        });
+                    }
+                }
+                return result;
+            }
+        }
+        function convertReferences(referenceSymbols) {
+            if (!referenceSymbols) {
+                return undefined;
+            }
+            var referenceEntries = [];
+            for (var _i = 0, referenceSymbols_1 = referenceSymbols; _i < referenceSymbols_1.length; _i++) {
+                var referenceSymbol = referenceSymbols_1[_i];
+                ts.addRange(referenceEntries, referenceSymbol.references);
+            }
+            return referenceEntries;
+        }
+        function findRenameLocations(fileName, position, findInStrings, findInComments) {
+            var referencedSymbols = findReferencedSymbols(fileName, position, findInStrings, findInComments);
+            return convertReferences(referencedSymbols);
+        }
+        function getReferencesAtPosition(fileName, position) {
+            var referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
+            return convertReferences(referencedSymbols);
+        }
+        function findReferences(fileName, position) {
+            var referencedSymbols = findReferencedSymbols(fileName, position, /*findInStrings*/ false, /*findInComments*/ false);
+            // Only include referenced symbols that have a valid definition.
+            return ts.filter(referencedSymbols, function (rs) { return !!rs.definition; });
+        }
+        function findReferencedSymbols(fileName, position, findInStrings, findInComments) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var node = ts.getTouchingPropertyName(sourceFile, position, /*includeJsDocComment*/ true);
+            if (node === sourceFile) {
+                return undefined;
+            }
+            if (node.kind !== 69 /* Identifier */ &&
+                // TODO (drosen): This should be enabled in a later release - currently breaks rename.
+                // node.kind !== SyntaxKind.ThisKeyword &&
+                // node.kind !== SyntaxKind.SuperKeyword &&
+                node.kind !== 9 /* StringLiteral */ &&
+                !isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                return undefined;
+            }
+            ts.Debug.assert(node.kind === 69 /* Identifier */ || node.kind === 8 /* NumericLiteral */ || node.kind === 9 /* StringLiteral */);
+            return getReferencedSymbolsForNode(node, program.getSourceFiles(), findInStrings, findInComments);
+        }
+        function getReferencedSymbolsForNode(node, sourceFiles, findInStrings, findInComments) {
+            var typeChecker = program.getTypeChecker();
+            // Labels
+            if (isLabelName(node)) {
+                if (isJumpStatementTarget(node)) {
+                    var labelDefinition = getTargetLabel(node.parent, node.text);
+                    // if we have a label definition, look within its statement for references, if not, then
+                    // the label is undefined and we have no results..
+                    return labelDefinition ? getLabelReferencesInNode(labelDefinition.parent, labelDefinition) : undefined;
+                }
+                else {
+                    // it is a label definition and not a target, search within the parent labeledStatement
+                    return getLabelReferencesInNode(node.parent, node);
+                }
+            }
+            if (node.kind === 97 /* ThisKeyword */ || node.kind === 165 /* ThisType */) {
+                return getReferencesForThisKeyword(node, sourceFiles);
+            }
+            if (node.kind === 95 /* SuperKeyword */) {
+                return getReferencesForSuperKeyword(node);
+            }
+            var symbol = typeChecker.getSymbolAtLocation(node);
+            if (!symbol && node.kind === 9 /* StringLiteral */) {
+                return getReferencesForStringLiteral(node, sourceFiles);
+            }
+            // Could not find a symbol e.g. unknown identifier
+            if (!symbol) {
+                // Can't have references to something that we have no symbol for.
+                return undefined;
+            }
+            var declarations = symbol.declarations;
+            // The symbol was an internal symbol and does not have a declaration e.g. undefined symbol
+            if (!declarations || !declarations.length) {
+                return undefined;
+            }
+            var result;
+            // Compute the meaning from the location and the symbol it references
+            var searchMeaning = getIntersectingMeaningFromDeclarations(getMeaningFromLocation(node), declarations);
+            // Get the text to search for.
+            // Note: if this is an external module symbol, the name doesn't include quotes.
+            var declaredName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
+            // Try to get the smallest valid scope that we can limit our search to;
+            // otherwise we'll need to search globally (i.e. include each file).
+            var scope = getSymbolScope(symbol);
+            // Maps from a symbol ID to the ReferencedSymbol entry in 'result'.
+            var symbolToIndex = [];
+            if (scope) {
+                result = [];
+                getReferencesInNode(scope, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
+            }
+            else {
+                var internedName = getInternedName(symbol, node, declarations);
+                for (var _i = 0, sourceFiles_4 = sourceFiles; _i < sourceFiles_4.length; _i++) {
+                    var sourceFile = sourceFiles_4[_i];
+                    cancellationToken.throwIfCancellationRequested();
+                    var nameTable = getNameTable(sourceFile);
+                    if (ts.lookUp(nameTable, internedName) !== undefined) {
+                        result = result || [];
+                        getReferencesInNode(sourceFile, symbol, declaredName, node, searchMeaning, findInStrings, findInComments, result, symbolToIndex);
+                    }
+                }
+            }
+            return result;
+            function getDefinition(symbol) {
+                var info = getSymbolDisplayPartsDocumentationAndSymbolKind(symbol, node.getSourceFile(), getContainerNode(node), node);
+                var name = ts.map(info.displayParts, function (p) { return p.text; }).join("");
+                var declarations = symbol.declarations;
+                if (!declarations || declarations.length === 0) {
+                    return undefined;
+                }
+                return {
+                    containerKind: "",
+                    containerName: "",
+                    name: name,
+                    kind: info.symbolKind,
+                    fileName: declarations[0].getSourceFile().fileName,
+                    textSpan: ts.createTextSpan(declarations[0].getStart(), 0)
+                };
+            }
+            function getAliasSymbolForPropertyNameSymbol(symbol, location) {
+                if (symbol.flags & 8388608 /* Alias */) {
+                    // Default import get alias
+                    var defaultImport = ts.getDeclarationOfKind(symbol, 231 /* ImportClause */);
+                    if (defaultImport) {
+                        return typeChecker.getAliasedSymbol(symbol);
+                    }
+                    var importOrExportSpecifier = ts.forEach(symbol.declarations, function (declaration) { return (declaration.kind === 234 /* ImportSpecifier */ ||
+                        declaration.kind === 238 /* ExportSpecifier */) ? declaration : undefined; });
+                    if (importOrExportSpecifier &&
+                        // export { a }
+                        (!importOrExportSpecifier.propertyName ||
+                            // export {a as class } where a is location
+                            importOrExportSpecifier.propertyName === location)) {
+                        // If Import specifier -> get alias
+                        // else Export specifier -> get local target
+                        return importOrExportSpecifier.kind === 234 /* ImportSpecifier */ ?
+                            typeChecker.getAliasedSymbol(symbol) :
+                            typeChecker.getExportSpecifierLocalTargetSymbol(importOrExportSpecifier);
+                    }
+                }
+                return undefined;
+            }
+            function getPropertySymbolOfDestructuringAssignment(location) {
+                return ts.isArrayLiteralOrObjectLiteralDestructuringPattern(location.parent.parent) &&
+                    typeChecker.getPropertySymbolOfDestructuringAssignment(location);
+            }
+            function isObjectBindingPatternElementWithoutPropertyName(symbol) {
+                var bindingElement = ts.getDeclarationOfKind(symbol, 169 /* BindingElement */);
+                return bindingElement &&
+                    bindingElement.parent.kind === 167 /* ObjectBindingPattern */ &&
+                    !bindingElement.propertyName;
+            }
+            function getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol) {
+                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
+                    var bindingElement = ts.getDeclarationOfKind(symbol, 169 /* BindingElement */);
+                    var typeOfPattern = typeChecker.getTypeAtLocation(bindingElement.parent);
+                    return typeOfPattern && typeChecker.getPropertyOfType(typeOfPattern, bindingElement.name.text);
+                }
+                return undefined;
+            }
+            function getInternedName(symbol, location, declarations) {
+                // If this is an export or import specifier it could have been renamed using the 'as' syntax.
+                // If so we want to search for whatever under the cursor.
+                if (ts.isImportOrExportSpecifierName(location)) {
+                    return location.getText();
+                }
+                // Try to get the local symbol if we're dealing with an 'export default'
+                // since that symbol has the "true" name.
+                var localExportDefaultSymbol = ts.getLocalSymbolForExportDefault(symbol);
+                symbol = localExportDefaultSymbol || symbol;
+                return ts.stripQuotes(symbol.name);
+            }
+            /**
+             * Determines the smallest scope in which a symbol may have named references.
+             * Note that not every construct has been accounted for. This function can
+             * probably be improved.
+             *
+             * @returns undefined if the scope cannot be determined, implying that
+             * a reference to a symbol can occur anywhere.
+             */
+            function getSymbolScope(symbol) {
+                // If this is the symbol of a named function expression or named class expression,
+                // then named references are limited to its own scope.
+                var valueDeclaration = symbol.valueDeclaration;
+                if (valueDeclaration && (valueDeclaration.kind === 179 /* FunctionExpression */ || valueDeclaration.kind === 192 /* ClassExpression */)) {
+                    return valueDeclaration;
+                }
+                // If this is private property or method, the scope is the containing class
+                if (symbol.flags & (4 /* Property */ | 8192 /* Method */)) {
+                    var privateDeclaration = ts.forEach(symbol.getDeclarations(), function (d) { return (d.flags & 8 /* Private */) ? d : undefined; });
+                    if (privateDeclaration) {
+                        return ts.getAncestor(privateDeclaration, 221 /* ClassDeclaration */);
+                    }
+                }
+                // If the symbol is an import we would like to find it if we are looking for what it imports.
+                // So consider it visible outside its declaration scope.
+                if (symbol.flags & 8388608 /* Alias */) {
+                    return undefined;
+                }
+                // If symbol is of object binding pattern element without property name we would want to
+                // look for property too and that could be anywhere
+                if (isObjectBindingPatternElementWithoutPropertyName(symbol)) {
+                    return undefined;
+                }
+                // if this symbol is visible from its parent container, e.g. exported, then bail out
+                // if symbol correspond to the union property - bail out
+                if (symbol.parent || (symbol.flags & 268435456 /* SyntheticProperty */)) {
+                    return undefined;
+                }
+                var scope;
+                var declarations = symbol.getDeclarations();
+                if (declarations) {
+                    for (var _i = 0, declarations_9 = declarations; _i < declarations_9.length; _i++) {
+                        var declaration = declarations_9[_i];
+                        var container = getContainerNode(declaration);
+                        if (!container) {
+                            return undefined;
+                        }
+                        if (scope && scope !== container) {
+                            // Different declarations have different containers, bail out
+                            return undefined;
+                        }
+                        if (container.kind === 256 /* SourceFile */ && !ts.isExternalModule(container)) {
+                            // This is a global variable and not an external module, any declaration defined
+                            // within this scope is visible outside the file
+                            return undefined;
+                        }
+                        // The search scope is the container node
+                        scope = container;
+                    }
+                }
+                return scope;
+            }
+            function getPossibleSymbolReferencePositions(sourceFile, symbolName, start, end) {
+                var positions = [];
+                /// TODO: Cache symbol existence for files to save text search
+                // Also, need to make this work for unicode escapes.
+                // Be resilient in the face of a symbol with no name or zero length name
+                if (!symbolName || !symbolName.length) {
+                    return positions;
+                }
+                var text = sourceFile.text;
+                var sourceLength = text.length;
+                var symbolNameLength = symbolName.length;
+                var position = text.indexOf(symbolName, start);
+                while (position >= 0) {
+                    cancellationToken.throwIfCancellationRequested();
+                    // If we are past the end, stop looking
+                    if (position > end)
+                        break;
+                    // We found a match.  Make sure it's not part of a larger word (i.e. the char
+                    // before and after it have to be a non-identifier char).
+                    var endPosition = position + symbolNameLength;
+                    if ((position === 0 || !ts.isIdentifierPart(text.charCodeAt(position - 1), 2 /* Latest */)) &&
+                        (endPosition === sourceLength || !ts.isIdentifierPart(text.charCodeAt(endPosition), 2 /* Latest */))) {
+                        // Found a real match.  Keep searching.
+                        positions.push(position);
+                    }
+                    position = text.indexOf(symbolName, position + symbolNameLength + 1);
+                }
+                return positions;
+            }
+            function getLabelReferencesInNode(container, targetLabel) {
+                var references = [];
+                var sourceFile = container.getSourceFile();
+                var labelName = targetLabel.text;
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, labelName, container.getStart(), container.getEnd());
+                ts.forEach(possiblePositions, function (position) {
+                    cancellationToken.throwIfCancellationRequested();
+                    var node = ts.getTouchingWord(sourceFile, position);
+                    if (!node || node.getWidth() !== labelName.length) {
+                        return;
+                    }
+                    // Only pick labels that are either the target label, or have a target that is the target label
+                    if (node === targetLabel ||
+                        (isJumpStatementTarget(node) && getTargetLabel(node, labelName) === targetLabel)) {
+                        references.push(getReferenceEntryFromNode(node));
+                    }
+                });
+                var definition = {
+                    containerKind: "",
+                    containerName: "",
+                    fileName: targetLabel.getSourceFile().fileName,
+                    kind: ScriptElementKind.label,
+                    name: labelName,
+                    textSpan: ts.createTextSpanFromBounds(targetLabel.getStart(), targetLabel.getEnd())
+                };
+                return [{ definition: definition, references: references }];
+            }
+            function isValidReferencePosition(node, searchSymbolName) {
+                if (node) {
+                    // Compare the length so we filter out strict superstrings of the symbol we are looking for
+                    switch (node.kind) {
+                        case 69 /* Identifier */:
+                            return node.getWidth() === searchSymbolName.length;
+                        case 9 /* StringLiteral */:
+                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node) ||
+                                isNameOfExternalModuleImportOrDeclaration(node)) {
+                                // For string literals we have two additional chars for the quotes
+                                return node.getWidth() === searchSymbolName.length + 2;
+                            }
+                            break;
+                        case 8 /* NumericLiteral */:
+                            if (isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                                return node.getWidth() === searchSymbolName.length;
+                            }
+                            break;
+                    }
+                }
+                return false;
+            }
+            /** Search within node "container" for references for a search value, where the search value is defined as a
+              * tuple of(searchSymbol, searchText, searchLocation, and searchMeaning).
+              * searchLocation: a node where the search value
+              */
+            function getReferencesInNode(container, searchSymbol, searchText, searchLocation, searchMeaning, findInStrings, findInComments, result, symbolToIndex) {
+                var sourceFile = container.getSourceFile();
+                var tripleSlashDirectivePrefixRegex = /^\/\/\/\s*</;
+                var start = findInComments ? container.getFullStart() : container.getStart();
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, searchText, start, container.getEnd());
+                if (possiblePositions.length) {
+                    // Build the set of symbols to search for, initially it has only the current symbol
+                    var searchSymbols_1 = populateSearchSymbolSet(searchSymbol, searchLocation);
+                    ts.forEach(possiblePositions, function (position) {
+                        cancellationToken.throwIfCancellationRequested();
+                        var referenceLocation = ts.getTouchingPropertyName(sourceFile, position);
+                        if (!isValidReferencePosition(referenceLocation, searchText)) {
+                            // This wasn't the start of a token.  Check to see if it might be a
+                            // match in a comment or string if that's what the caller is asking
+                            // for.
+                            if ((findInStrings && ts.isInString(sourceFile, position)) ||
+                                (findInComments && isInNonReferenceComment(sourceFile, position))) {
+                                // In the case where we're looking inside comments/strings, we don't have
+                                // an actual definition.  So just use 'undefined' here.  Features like
+                                // 'Rename' won't care (as they ignore the definitions), and features like
+                                // 'FindReferences' will just filter out these results.
+                                result.push({
+                                    definition: undefined,
+                                    references: [{
+                                            fileName: sourceFile.fileName,
+                                            textSpan: ts.createTextSpan(position, searchText.length),
+                                            isWriteAccess: false
+                                        }]
+                                });
+                            }
+                            return;
+                        }
+                        if (!(getMeaningFromLocation(referenceLocation) & searchMeaning)) {
+                            return;
+                        }
+                        var referenceSymbol = typeChecker.getSymbolAtLocation(referenceLocation);
+                        if (referenceSymbol) {
+                            var referenceSymbolDeclaration = referenceSymbol.valueDeclaration;
+                            var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(referenceSymbolDeclaration);
+                            var relatedSymbol = getRelatedSymbol(searchSymbols_1, referenceSymbol, referenceLocation);
+                            if (relatedSymbol) {
+                                var referencedSymbol = getReferencedSymbol(relatedSymbol);
+                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceLocation));
+                            }
+                            else if (!(referenceSymbol.flags & 67108864 /* Transient */) && searchSymbols_1.indexOf(shorthandValueSymbol) >= 0) {
+                                var referencedSymbol = getReferencedSymbol(shorthandValueSymbol);
+                                referencedSymbol.references.push(getReferenceEntryFromNode(referenceSymbolDeclaration.name));
+                            }
+                        }
+                    });
+                }
+                return;
+                function getReferencedSymbol(symbol) {
+                    var symbolId = ts.getSymbolId(symbol);
+                    var index = symbolToIndex[symbolId];
+                    if (index === undefined) {
+                        index = result.length;
+                        symbolToIndex[symbolId] = index;
+                        result.push({
+                            definition: getDefinition(symbol),
+                            references: []
+                        });
+                    }
+                    return result[index];
+                }
+                function isInNonReferenceComment(sourceFile, position) {
+                    return ts.isInCommentHelper(sourceFile, position, isNonReferenceComment);
+                    function isNonReferenceComment(c) {
+                        var commentText = sourceFile.text.substring(c.pos, c.end);
+                        return !tripleSlashDirectivePrefixRegex.test(commentText);
+                    }
+                }
+            }
+            function getReferencesForSuperKeyword(superKeyword) {
+                var searchSpaceNode = ts.getSuperContainer(superKeyword, /*stopOnFunctions*/ false);
+                if (!searchSpaceNode) {
+                    return undefined;
+                }
+                // Whether 'super' occurs in a static context within a class.
+                var staticFlag = 32 /* Static */;
+                switch (searchSpaceNode.kind) {
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                    case 148 /* Constructor */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        staticFlag &= searchSpaceNode.flags;
+                        searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
+                        break;
+                    default:
+                        return undefined;
+                }
+                var references = [];
+                var sourceFile = searchSpaceNode.getSourceFile();
+                var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "super", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
+                ts.forEach(possiblePositions, function (position) {
+                    cancellationToken.throwIfCancellationRequested();
+                    var node = ts.getTouchingWord(sourceFile, position);
+                    if (!node || node.kind !== 95 /* SuperKeyword */) {
+                        return;
+                    }
+                    var container = ts.getSuperContainer(node, /*stopOnFunctions*/ false);
+                    // If we have a 'super' container, we must have an enclosing class.
+                    // Now make sure the owning class is the same as the search-space
+                    // and has the same static qualifier as the original 'super's owner.
+                    if (container && (32 /* Static */ & container.flags) === staticFlag && container.parent.symbol === searchSpaceNode.symbol) {
+                        references.push(getReferenceEntryFromNode(node));
+                    }
+                });
+                var definition = getDefinition(searchSpaceNode.symbol);
+                return [{ definition: definition, references: references }];
+            }
+            function getReferencesForThisKeyword(thisOrSuperKeyword, sourceFiles) {
+                var searchSpaceNode = ts.getThisContainer(thisOrSuperKeyword, /* includeArrowFunctions */ false);
+                // Whether 'this' occurs in a static context within a class.
+                var staticFlag = 32 /* Static */;
+                switch (searchSpaceNode.kind) {
+                    case 147 /* MethodDeclaration */:
+                    case 146 /* MethodSignature */:
+                        if (ts.isObjectLiteralMethod(searchSpaceNode)) {
+                            break;
+                        }
+                    // fall through
+                    case 145 /* PropertyDeclaration */:
+                    case 144 /* PropertySignature */:
+                    case 148 /* Constructor */:
+                    case 149 /* GetAccessor */:
+                    case 150 /* SetAccessor */:
+                        staticFlag &= searchSpaceNode.flags;
+                        searchSpaceNode = searchSpaceNode.parent; // re-assign to be the owning class
+                        break;
+                    case 256 /* SourceFile */:
+                        if (ts.isExternalModule(searchSpaceNode)) {
+                            return undefined;
+                        }
+                    // Fall through
+                    case 220 /* FunctionDeclaration */:
+                    case 179 /* FunctionExpression */:
+                        break;
+                    // Computed properties in classes are not handled here because references to this are illegal,
+                    // so there is no point finding references to them.
+                    default:
+                        return undefined;
+                }
+                var references = [];
+                var possiblePositions;
+                if (searchSpaceNode.kind === 256 /* SourceFile */) {
+                    ts.forEach(sourceFiles, function (sourceFile) {
+                        possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", sourceFile.getStart(), sourceFile.getEnd());
+                        getThisReferencesInFile(sourceFile, sourceFile, possiblePositions, references);
+                    });
+                }
+                else {
+                    var sourceFile = searchSpaceNode.getSourceFile();
+                    possiblePositions = getPossibleSymbolReferencePositions(sourceFile, "this", searchSpaceNode.getStart(), searchSpaceNode.getEnd());
+                    getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, references);
+                }
+                return [{
+                        definition: {
+                            containerKind: "",
+                            containerName: "",
+                            fileName: node.getSourceFile().fileName,
+                            kind: ScriptElementKind.variableElement,
+                            name: "this",
+                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
+                        },
+                        references: references
+                    }];
+                function getThisReferencesInFile(sourceFile, searchSpaceNode, possiblePositions, result) {
+                    ts.forEach(possiblePositions, function (position) {
+                        cancellationToken.throwIfCancellationRequested();
+                        var node = ts.getTouchingWord(sourceFile, position);
+                        if (!node || (node.kind !== 97 /* ThisKeyword */ && node.kind !== 165 /* ThisType */)) {
+                            return;
+                        }
+                        var container = ts.getThisContainer(node, /* includeArrowFunctions */ false);
+                        switch (searchSpaceNode.kind) {
+                            case 179 /* FunctionExpression */:
+                            case 220 /* FunctionDeclaration */:
+                                if (searchSpaceNode.symbol === container.symbol) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                            case 147 /* MethodDeclaration */:
+                            case 146 /* MethodSignature */:
+                                if (ts.isObjectLiteralMethod(searchSpaceNode) && searchSpaceNode.symbol === container.symbol) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                            case 192 /* ClassExpression */:
+                            case 221 /* ClassDeclaration */:
+                                // Make sure the container belongs to the same class
+                                // and has the appropriate static modifier from the original container.
+                                if (container.parent && searchSpaceNode.symbol === container.parent.symbol && (container.flags & 32 /* Static */) === staticFlag) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                            case 256 /* SourceFile */:
+                                if (container.kind === 256 /* SourceFile */ && !ts.isExternalModule(container)) {
+                                    result.push(getReferenceEntryFromNode(node));
+                                }
+                                break;
+                        }
+                    });
+                }
+            }
+            function getReferencesForStringLiteral(node, sourceFiles) {
+                var typeChecker = program.getTypeChecker();
+                var type = getStringLiteralTypeForNode(node, typeChecker);
+                if (!type) {
+                    // nothing to do here. moving on
+                    return undefined;
+                }
+                var references = [];
+                for (var _i = 0, sourceFiles_5 = sourceFiles; _i < sourceFiles_5.length; _i++) {
+                    var sourceFile = sourceFiles_5[_i];
+                    var possiblePositions = getPossibleSymbolReferencePositions(sourceFile, type.text, sourceFile.getStart(), sourceFile.getEnd());
+                    getReferencesForStringLiteralInFile(sourceFile, type, possiblePositions, references);
+                }
+                return [{
+                        definition: {
+                            containerKind: "",
+                            containerName: "",
+                            fileName: node.getSourceFile().fileName,
+                            kind: ScriptElementKind.variableElement,
+                            name: type.text,
+                            textSpan: ts.createTextSpanFromBounds(node.getStart(), node.getEnd())
+                        },
+                        references: references
+                    }];
+                function getReferencesForStringLiteralInFile(sourceFile, searchType, possiblePositions, references) {
+                    for (var _i = 0, possiblePositions_1 = possiblePositions; _i < possiblePositions_1.length; _i++) {
+                        var position = possiblePositions_1[_i];
+                        cancellationToken.throwIfCancellationRequested();
+                        var node_2 = ts.getTouchingWord(sourceFile, position);
+                        if (!node_2 || node_2.kind !== 9 /* StringLiteral */) {
+                            return;
+                        }
+                        var type_1 = getStringLiteralTypeForNode(node_2, typeChecker);
+                        if (type_1 === searchType) {
+                            references.push(getReferenceEntryFromNode(node_2));
+                        }
+                    }
+                }
+            }
+            function populateSearchSymbolSet(symbol, location) {
+                // The search set contains at least the current symbol
+                var result = [symbol];
+                // If the location is name of property symbol from object literal destructuring pattern
+                // Search the property symbol
+                //      for ( { property: p2 } of elems) { }
+                var containingObjectLiteralElement = getContainingObjectLiteralElement(location);
+                if (containingObjectLiteralElement && containingObjectLiteralElement.kind !== 254 /* ShorthandPropertyAssignment */) {
+                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(location);
+                    if (propertySymbol) {
+                        result.push(propertySymbol);
+                    }
+                }
+                // If the symbol is an alias, add what it aliases to the list
+                //     import {a} from "mod";
+                //     export {a}
+                // If the symbol is an alias to default declaration, add what it aliases to the list
+                //     declare "mod" { export default class B { } }
+                //     import B from "mod";
+                //// For export specifiers, the exported name can be referring to a local symbol, e.g.:
+                ////     import {a} from "mod";
+                ////     export {a as somethingElse}
+                //// We want the *local* declaration of 'a' as declared in the import,
+                //// *not* as declared within "mod" (or farther)
+                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(symbol, location);
+                if (aliasSymbol) {
+                    result = result.concat(populateSearchSymbolSet(aliasSymbol, location));
+                }
+                // If the location is in a context sensitive location (i.e. in an object literal) try
+                // to get a contextual type for it, and add the property symbol from the contextual
+                // type to the search set
+                if (containingObjectLiteralElement) {
+                    ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
+                        ts.addRange(result, typeChecker.getRootSymbols(contextualSymbol));
+                    });
+                    /* Because in short-hand property assignment, location has two meaning : property name and as value of the property
+                     * When we do findAllReference at the position of the short-hand property assignment, we would want to have references to position of
+                     * property name and variable declaration of the identifier.
+                     * Like in below example, when querying for all references for an identifier 'name', of the property assignment, the language service
+                     * should show both 'name' in 'obj' and 'name' in variable declaration
+                     *      const name = "Foo";
+                     *      const obj = { name };
+                     * In order to do that, we will populate the search set with the value symbol of the identifier as a value of the property assignment
+                     * so that when matching with potential reference symbol, both symbols from property declaration and variable declaration
+                     * will be included correctly.
+                     */
+                    var shorthandValueSymbol = typeChecker.getShorthandAssignmentValueSymbol(location.parent);
+                    if (shorthandValueSymbol) {
+                        result.push(shorthandValueSymbol);
+                    }
+                }
+                // If the symbol.valueDeclaration is a property parameter declaration,
+                // we should include both parameter declaration symbol and property declaration symbol
+                // Parameter Declaration symbol is only visible within function scope, so the symbol is stored in constructor.locals.
+                // Property Declaration symbol is a member of the class, so the symbol is stored in its class Declaration.symbol.members
+                if (symbol.valueDeclaration && symbol.valueDeclaration.kind === 142 /* Parameter */ &&
+                    ts.isParameterPropertyDeclaration(symbol.valueDeclaration)) {
+                    result = result.concat(typeChecker.getSymbolsOfParameterPropertyDeclaration(symbol.valueDeclaration, symbol.name));
+                }
+                // If this is symbol of binding element without propertyName declaration in Object binding pattern
+                // Include the property in the search
+                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(symbol);
+                if (bindingElementPropertySymbol) {
+                    result.push(bindingElementPropertySymbol);
+                }
+                // If this is a union property, add all the symbols from all its source symbols in all unioned types.
+                // If the symbol is an instantiation from a another symbol (e.g. widened symbol) , add the root the list
+                ts.forEach(typeChecker.getRootSymbols(symbol), function (rootSymbol) {
+                    if (rootSymbol !== symbol) {
+                        result.push(rootSymbol);
+                    }
+                    // Add symbol of properties/methods of the same name in base classes and implemented interfaces definitions
+                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 /* Class */ | 64 /* Interface */)) {
+                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result, /*previousIterationSymbolsCache*/ {});
+                    }
+                });
+                return result;
+            }
+            /**
+             * Find symbol of the given property-name and add the symbol to the given result array
+             * @param symbol a symbol to start searching for the given propertyName
+             * @param propertyName a name of property to search for
+             * @param result an array of symbol of found property symbols
+             * @param previousIterationSymbolsCache a cache of symbol from previous iterations of calling this function to prevent infinite revisiting of the same symbol.
+             *                                The value of previousIterationSymbol is undefined when the function is first called.
+             */
+            function getPropertySymbolsFromBaseTypes(symbol, propertyName, result, previousIterationSymbolsCache) {
+                if (!symbol) {
+                    return;
+                }
+                // If the current symbol is the same as the previous-iteration symbol, we can just return the symbol that has already been visited
+                // This is particularly important for the following cases, so that we do not infinitely visit the same symbol.
+                // For example:
+                //      interface C extends C {
+                //          /*findRef*/propName: string;
+                //      }
+                // The first time getPropertySymbolsFromBaseTypes is called when finding-all-references at propName,
+                // the symbol argument will be the symbol of an interface "C" and previousIterationSymbol is undefined,
+                // the function will add any found symbol of the property-name, then its sub-routine will call
+                // getPropertySymbolsFromBaseTypes again to walk up any base types to prevent revisiting already
+                // visited symbol, interface "C", the sub-routine will pass the current symbol as previousIterationSymbol.
+                if (ts.hasProperty(previousIterationSymbolsCache, symbol.name)) {
+                    return;
+                }
+                if (symbol.flags & (32 /* Class */ | 64 /* Interface */)) {
+                    ts.forEach(symbol.getDeclarations(), function (declaration) {
+                        if (ts.isClassLike(declaration)) {
+                            getPropertySymbolFromTypeReference(ts.getClassExtendsHeritageClauseElement(declaration));
+                            ts.forEach(ts.getClassImplementsHeritageClauseElements(declaration), getPropertySymbolFromTypeReference);
+                        }
+                        else if (declaration.kind === 222 /* InterfaceDeclaration */) {
+                            ts.forEach(ts.getInterfaceBaseTypeNodes(declaration), getPropertySymbolFromTypeReference);
+                        }
+                    });
+                }
+                return;
+                function getPropertySymbolFromTypeReference(typeReference) {
+                    if (typeReference) {
+                        var type = typeChecker.getTypeAtLocation(typeReference);
+                        if (type) {
+                            var propertySymbol = typeChecker.getPropertyOfType(type, propertyName);
+                            if (propertySymbol) {
+                                result.push.apply(result, typeChecker.getRootSymbols(propertySymbol));
+                            }
+                            // Visit the typeReference as well to see if it directly or indirectly use that property
+                            previousIterationSymbolsCache[symbol.name] = symbol;
+                            getPropertySymbolsFromBaseTypes(type.symbol, propertyName, result, previousIterationSymbolsCache);
+                        }
+                    }
+                }
+            }
+            function getRelatedSymbol(searchSymbols, referenceSymbol, referenceLocation) {
+                if (searchSymbols.indexOf(referenceSymbol) >= 0) {
+                    return referenceSymbol;
+                }
+                // If the reference symbol is an alias, check if what it is aliasing is one of the search
+                // symbols but by looking up for related symbol of this alias so it can handle multiple level of indirectness.
+                var aliasSymbol = getAliasSymbolForPropertyNameSymbol(referenceSymbol, referenceLocation);
+                if (aliasSymbol) {
+                    return getRelatedSymbol(searchSymbols, aliasSymbol, referenceLocation);
+                }
+                // If the reference location is in an object literal, try to get the contextual type for the
+                // object literal, lookup the property symbol in the contextual type, and use this symbol to
+                // compare to our searchSymbol
+                var containingObjectLiteralElement = getContainingObjectLiteralElement(referenceLocation);
+                if (containingObjectLiteralElement) {
+                    var contextualSymbol = ts.forEach(getPropertySymbolsFromContextualType(containingObjectLiteralElement), function (contextualSymbol) {
+                        return ts.forEach(typeChecker.getRootSymbols(contextualSymbol), function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
+                    });
+                    if (contextualSymbol) {
+                        return contextualSymbol;
+                    }
+                    // If the reference location is the name of property from object literal destructuring pattern
+                    // Get the property symbol from the object literal's type and look if thats the search symbol
+                    // In below eg. get 'property' from type of elems iterating type
+                    //      for ( { property: p2 } of elems) { }
+                    var propertySymbol = getPropertySymbolOfDestructuringAssignment(referenceLocation);
+                    if (propertySymbol && searchSymbols.indexOf(propertySymbol) >= 0) {
+                        return propertySymbol;
+                    }
+                }
+                // If the reference location is the binding element and doesn't have property name
+                // then include the binding element in the related symbols
+                //      let { a } : { a };
+                var bindingElementPropertySymbol = getPropertySymbolOfObjectBindingPatternWithoutPropertyName(referenceSymbol);
+                if (bindingElementPropertySymbol && searchSymbols.indexOf(bindingElementPropertySymbol) >= 0) {
+                    return bindingElementPropertySymbol;
+                }
+                // Unwrap symbols to get to the root (e.g. transient symbols as a result of widening)
+                // Or a union property, use its underlying unioned symbols
+                return ts.forEach(typeChecker.getRootSymbols(referenceSymbol), function (rootSymbol) {
+                    // if it is in the list, then we are done
+                    if (searchSymbols.indexOf(rootSymbol) >= 0) {
+                        return rootSymbol;
+                    }
+                    // Finally, try all properties with the same name in any type the containing type extended or implemented, and
+                    // see if any is in the list
+                    if (rootSymbol.parent && rootSymbol.parent.flags & (32 /* Class */ | 64 /* Interface */)) {
+                        var result_4 = [];
+                        getPropertySymbolsFromBaseTypes(rootSymbol.parent, rootSymbol.getName(), result_4, /*previousIterationSymbolsCache*/ {});
+                        return ts.forEach(result_4, function (s) { return searchSymbols.indexOf(s) >= 0 ? s : undefined; });
+                    }
+                    return undefined;
+                });
+            }
+            function getNameFromObjectLiteralElement(node) {
+                if (node.name.kind === 140 /* ComputedPropertyName */) {
+                    var nameExpression = node.name.expression;
+                    // treat computed property names where expression is string/numeric literal as just string/numeric literal
+                    if (ts.isStringOrNumericLiteral(nameExpression.kind)) {
+                        return nameExpression.text;
+                    }
+                    return undefined;
+                }
+                return node.name.text;
+            }
+            function getPropertySymbolsFromContextualType(node) {
+                var objectLiteral = node.parent;
+                var contextualType = typeChecker.getContextualType(objectLiteral);
+                var name = getNameFromObjectLiteralElement(node);
+                if (name && contextualType) {
+                    var result_5 = [];
+                    var symbol_1 = contextualType.getProperty(name);
+                    if (symbol_1) {
+                        result_5.push(symbol_1);
+                    }
+                    if (contextualType.flags & 16384 /* Union */) {
+                        ts.forEach(contextualType.types, function (t) {
+                            var symbol = t.getProperty(name);
+                            if (symbol) {
+                                result_5.push(symbol);
+                            }
+                        });
+                    }
+                    return result_5;
+                }
+                return undefined;
+            }
+            /** Given an initial searchMeaning, extracted from a location, widen the search scope based on the declarations
+              * of the corresponding symbol. e.g. if we are searching for "Foo" in value position, but "Foo" references a class
+              * then we need to widen the search to include type positions as well.
+              * On the contrary, if we are searching for "Bar" in type position and we trace bar to an interface, and an uninstantiated
+              * module, we want to keep the search limited to only types, as the two declarations (interface and uninstantiated module)
+              * do not intersect in any of the three spaces.
+              */
+            function getIntersectingMeaningFromDeclarations(meaning, declarations) {
+                if (declarations) {
+                    var lastIterationMeaning = void 0;
+                    do {
+                        // The result is order-sensitive, for instance if initialMeaning === Namespace, and declarations = [class, instantiated module]
+                        // we need to consider both as they initialMeaning intersects with the module in the namespace space, and the module
+                        // intersects with the class in the value space.
+                        // To achieve that we will keep iterating until the result stabilizes.
+                        // Remember the last meaning
+                        lastIterationMeaning = meaning;
+                        for (var _i = 0, declarations_10 = declarations; _i < declarations_10.length; _i++) {
+                            var declaration = declarations_10[_i];
+                            var declarationMeaning = getMeaningFromDeclaration(declaration);
+                            if (declarationMeaning & meaning) {
+                                meaning |= declarationMeaning;
+                            }
+                        }
+                    } while (meaning !== lastIterationMeaning);
+                }
+                return meaning;
+            }
+        }
+        function getReferenceEntryFromNode(node) {
+            var start = node.getStart();
+            var end = node.getEnd();
+            if (node.kind === 9 /* StringLiteral */) {
+                start += 1;
+                end -= 1;
+            }
+            return {
+                fileName: node.getSourceFile().fileName,
+                textSpan: ts.createTextSpanFromBounds(start, end),
+                isWriteAccess: isWriteAccess(node)
+            };
+        }
+        /** A node is considered a writeAccess iff it is a name of a declaration or a target of an assignment */
+        function isWriteAccess(node) {
+            if (node.kind === 69 /* Identifier */ && ts.isDeclarationName(node)) {
+                return true;
+            }
+            var parent = node.parent;
+            if (parent) {
+                if (parent.kind === 186 /* PostfixUnaryExpression */ || parent.kind === 185 /* PrefixUnaryExpression */) {
+                    return true;
+                }
+                else if (parent.kind === 187 /* BinaryExpression */ && parent.left === node) {
+                    var operator = parent.operatorToken.kind;
+                    return 56 /* FirstAssignment */ <= operator && operator <= 68 /* LastAssignment */;
+                }
+            }
+            return false;
+        }
+        /// NavigateTo
+        function getNavigateToItems(searchValue, maxResultCount) {
+            synchronizeHostData();
+            var checker = getProgram().getTypeChecker();
+            return ts.NavigateTo.getNavigateToItems(program, checker, cancellationToken, searchValue, maxResultCount);
+        }
+        function getEmitOutput(fileName) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var outputFiles = [];
+            function writeFile(fileName, data, writeByteOrderMark) {
+                outputFiles.push({
+                    name: fileName,
+                    writeByteOrderMark: writeByteOrderMark,
+                    text: data
+                });
+            }
+            var emitOutput = program.emit(sourceFile, writeFile, cancellationToken);
+            return {
+                outputFiles: outputFiles,
+                emitSkipped: emitOutput.emitSkipped
+            };
+        }
+        function getMeaningFromDeclaration(node) {
+            switch (node.kind) {
+                case 142 /* Parameter */:
+                case 218 /* VariableDeclaration */:
+                case 169 /* BindingElement */:
+                case 145 /* PropertyDeclaration */:
+                case 144 /* PropertySignature */:
+                case 253 /* PropertyAssignment */:
+                case 254 /* ShorthandPropertyAssignment */:
+                case 255 /* EnumMember */:
+                case 147 /* MethodDeclaration */:
+                case 146 /* MethodSignature */:
+                case 148 /* Constructor */:
+                case 149 /* GetAccessor */:
+                case 150 /* SetAccessor */:
+                case 220 /* FunctionDeclaration */:
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                case 252 /* CatchClause */:
+                    return 1 /* Value */;
+                case 141 /* TypeParameter */:
+                case 222 /* InterfaceDeclaration */:
+                case 223 /* TypeAliasDeclaration */:
+                case 159 /* TypeLiteral */:
+                    return 2 /* Type */;
+                case 221 /* ClassDeclaration */:
+                case 224 /* EnumDeclaration */:
+                    return 1 /* Value */ | 2 /* Type */;
+                case 225 /* ModuleDeclaration */:
+                    if (ts.isAmbientModule(node)) {
+                        return 4 /* Namespace */ | 1 /* Value */;
+                    }
+                    else if (ts.getModuleInstanceState(node) === 1 /* Instantiated */) {
+                        return 4 /* Namespace */ | 1 /* Value */;
+                    }
+                    else {
+                        return 4 /* Namespace */;
+                    }
+                case 233 /* NamedImports */:
+                case 234 /* ImportSpecifier */:
+                case 229 /* ImportEqualsDeclaration */:
+                case 230 /* ImportDeclaration */:
+                case 235 /* ExportAssignment */:
+                case 236 /* ExportDeclaration */:
+                    return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+                // An external module can be a Value
+                case 256 /* SourceFile */:
+                    return 4 /* Namespace */ | 1 /* Value */;
+            }
+            return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+        }
+        function isTypeReference(node) {
+            if (ts.isRightSideOfQualifiedNameOrPropertyAccess(node)) {
+                node = node.parent;
+            }
+            return node.parent.kind === 155 /* TypeReference */ ||
+                (node.parent.kind === 194 /* ExpressionWithTypeArguments */ && !ts.isExpressionWithTypeArgumentsInClassExtendsClause(node.parent)) ||
+                (node.kind === 97 /* ThisKeyword */ && !ts.isExpression(node)) ||
+                node.kind === 165 /* ThisType */;
+        }
+        function isNamespaceReference(node) {
+            return isQualifiedNameNamespaceReference(node) || isPropertyAccessNamespaceReference(node);
+        }
+        function isPropertyAccessNamespaceReference(node) {
+            var root = node;
+            var isLastClause = true;
+            if (root.parent.kind === 172 /* PropertyAccessExpression */) {
+                while (root.parent && root.parent.kind === 172 /* PropertyAccessExpression */) {
+                    root = root.parent;
+                }
+                isLastClause = root.name === node;
+            }
+            if (!isLastClause && root.parent.kind === 194 /* ExpressionWithTypeArguments */ && root.parent.parent.kind === 251 /* HeritageClause */) {
+                var decl = root.parent.parent.parent;
+                return (decl.kind === 221 /* ClassDeclaration */ && root.parent.parent.token === 106 /* ImplementsKeyword */) ||
+                    (decl.kind === 222 /* InterfaceDeclaration */ && root.parent.parent.token === 83 /* ExtendsKeyword */);
+            }
+            return false;
+        }
+        function isQualifiedNameNamespaceReference(node) {
+            var root = node;
+            var isLastClause = true;
+            if (root.parent.kind === 139 /* QualifiedName */) {
+                while (root.parent && root.parent.kind === 139 /* QualifiedName */) {
+                    root = root.parent;
+                }
+                isLastClause = root.right === node;
+            }
+            return root.parent.kind === 155 /* TypeReference */ && !isLastClause;
+        }
+        function isInRightSideOfImport(node) {
+            while (node.parent.kind === 139 /* QualifiedName */) {
+                node = node.parent;
+            }
+            return ts.isInternalModuleImportEqualsDeclaration(node.parent) && node.parent.moduleReference === node;
+        }
+        function getMeaningFromRightHandSideOfImportEquals(node) {
+            ts.Debug.assert(node.kind === 69 /* Identifier */);
+            //     import a = |b|; // Namespace
+            //     import a = |b.c|; // Value, type, namespace
+            //     import a = |b.c|.d; // Namespace
+            if (node.parent.kind === 139 /* QualifiedName */ &&
+                node.parent.right === node &&
+                node.parent.parent.kind === 229 /* ImportEqualsDeclaration */) {
+                return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+            }
+            return 4 /* Namespace */;
+        }
+        function getMeaningFromLocation(node) {
+            if (node.parent.kind === 235 /* ExportAssignment */) {
+                return 1 /* Value */ | 2 /* Type */ | 4 /* Namespace */;
+            }
+            else if (isInRightSideOfImport(node)) {
+                return getMeaningFromRightHandSideOfImportEquals(node);
+            }
+            else if (ts.isDeclarationName(node)) {
+                return getMeaningFromDeclaration(node.parent);
+            }
+            else if (isTypeReference(node)) {
+                return 2 /* Type */;
+            }
+            else if (isNamespaceReference(node)) {
+                return 4 /* Namespace */;
+            }
+            else {
+                return 1 /* Value */;
+            }
+        }
+        // Signature help
+        /**
+         * This is a semantic operation.
+         */
+        function getSignatureHelpItems(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            return ts.SignatureHelp.getSignatureHelpItems(program, sourceFile, position, cancellationToken);
+        }
+        /// Syntactic features
+        function getNonBoundSourceFile(fileName) {
+            return syntaxTreeCache.getCurrentSourceFile(fileName);
+        }
+        function getNameOrDottedNameSpan(fileName, startPos, endPos) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            // Get node at the location
+            var node = ts.getTouchingPropertyName(sourceFile, startPos);
+            if (node === sourceFile) {
+                return;
+            }
+            switch (node.kind) {
+                case 172 /* PropertyAccessExpression */:
+                case 139 /* QualifiedName */:
+                case 9 /* StringLiteral */:
+                case 166 /* StringLiteralType */:
+                case 84 /* FalseKeyword */:
+                case 99 /* TrueKeyword */:
+                case 93 /* NullKeyword */:
+                case 95 /* SuperKeyword */:
+                case 97 /* ThisKeyword */:
+                case 165 /* ThisType */:
+                case 69 /* Identifier */:
+                    break;
+                // Cant create the text span
+                default:
+                    return;
+            }
+            var nodeForStartPos = node;
+            while (true) {
+                if (isRightSideOfPropertyAccess(nodeForStartPos) || isRightSideOfQualifiedName(nodeForStartPos)) {
+                    // If on the span is in right side of the the property or qualified name, return the span from the qualified name pos to end of this node
+                    nodeForStartPos = nodeForStartPos.parent;
+                }
+                else if (isNameOfModuleDeclaration(nodeForStartPos)) {
+                    // If this is name of a module declarations, check if this is right side of dotted module name
+                    // If parent of the module declaration which is parent of this node is module declaration and its body is the module declaration that this node is name of
+                    // Then this name is name from dotted module
+                    if (nodeForStartPos.parent.parent.kind === 225 /* ModuleDeclaration */ &&
+                        nodeForStartPos.parent.parent.body === nodeForStartPos.parent) {
+                        // Use parent module declarations name for start pos
+                        nodeForStartPos = nodeForStartPos.parent.parent.name;
+                    }
+                    else {
+                        // We have to use this name for start pos
+                        break;
+                    }
+                }
+                else {
+                    // Is not a member expression so we have found the node for start pos
+                    break;
+                }
+            }
+            return ts.createTextSpanFromBounds(nodeForStartPos.getStart(), node.getEnd());
+        }
+        function getBreakpointStatementAtPosition(fileName, position) {
+            // doesn't use compiler - no need to synchronize with host
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.BreakpointResolver.spanInSourceFileAtLocation(sourceFile, position);
+        }
+        function getNavigationBarItems(fileName) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.NavigationBar.getNavigationBarItems(sourceFile, host.getCompilationSettings());
+        }
+        function getSemanticClassifications(fileName, span) {
+            return convertClassifications(getEncodedSemanticClassifications(fileName, span));
+        }
+        function checkForClassificationCancellation(kind) {
+            // We don't want to actually call back into our host on every node to find out if we've
+            // been canceled.  That would be an enormous amount of chattyness, along with the all
+            // the overhead of marshalling the data to/from the host.  So instead we pick a few
+            // reasonable node kinds to bother checking on.  These node kinds represent high level
+            // constructs that we would expect to see commonly, but just at a far less frequent
+            // interval.
+            //
+            // For example, in checker.ts (around 750k) we only have around 600 of these constructs.
+            // That means we're calling back into the host around every 1.2k of the file we process.
+            // Lib.d.ts has similar numbers.
+            switch (kind) {
+                case 225 /* ModuleDeclaration */:
+                case 221 /* ClassDeclaration */:
+                case 222 /* InterfaceDeclaration */:
+                case 220 /* FunctionDeclaration */:
+                    cancellationToken.throwIfCancellationRequested();
+            }
+        }
+        function getEncodedSemanticClassifications(fileName, span) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var typeChecker = program.getTypeChecker();
+            var result = [];
+            var classifiableNames = program.getClassifiableNames();
+            processNode(sourceFile);
+            return { spans: result, endOfLineState: 0 /* None */ };
+            function pushClassification(start, length, type) {
+                result.push(start);
+                result.push(length);
+                result.push(type);
+            }
+            function classifySymbol(symbol, meaningAtPosition) {
+                var flags = symbol.getFlags();
+                if ((flags & 788448 /* Classifiable */) === 0 /* None */) {
+                    return;
+                }
+                if (flags & 32 /* Class */) {
+                    return 11 /* className */;
+                }
+                else if (flags & 384 /* Enum */) {
+                    return 12 /* enumName */;
+                }
+                else if (flags & 524288 /* TypeAlias */) {
+                    return 16 /* typeAliasName */;
+                }
+                else if (meaningAtPosition & 2 /* Type */) {
+                    if (flags & 64 /* Interface */) {
+                        return 13 /* interfaceName */;
+                    }
+                    else if (flags & 262144 /* TypeParameter */) {
+                        return 15 /* typeParameterName */;
+                    }
+                }
+                else if (flags & 1536 /* Module */) {
+                    // Only classify a module as such if
+                    //  - It appears in a namespace context.
+                    //  - There exists a module declaration which actually impacts the value side.
+                    if (meaningAtPosition & 4 /* Namespace */ ||
+                        (meaningAtPosition & 1 /* Value */ && hasValueSideModule(symbol))) {
+                        return 14 /* moduleName */;
+                    }
+                }
+                return undefined;
+                /**
+                 * Returns true if there exists a module that introduces entities on the value side.
+                 */
+                function hasValueSideModule(symbol) {
+                    return ts.forEach(symbol.declarations, function (declaration) {
+                        return declaration.kind === 225 /* ModuleDeclaration */ &&
+                            ts.getModuleInstanceState(declaration) === 1 /* Instantiated */;
+                    });
+                }
+            }
+            function processNode(node) {
+                // Only walk into nodes that intersect the requested span.
+                if (node && ts.textSpanIntersectsWith(span, node.getFullStart(), node.getFullWidth())) {
+                    var kind = node.kind;
+                    checkForClassificationCancellation(kind);
+                    if (kind === 69 /* Identifier */ && !ts.nodeIsMissing(node)) {
+                        var identifier = node;
+                        // Only bother calling into the typechecker if this is an identifier that
+                        // could possibly resolve to a type name.  This makes classification run
+                        // in a third of the time it would normally take.
+                        if (classifiableNames[identifier.text]) {
+                            var symbol = typeChecker.getSymbolAtLocation(node);
+                            if (symbol) {
+                                var type = classifySymbol(symbol, getMeaningFromLocation(node));
+                                if (type) {
+                                    pushClassification(node.getStart(), node.getWidth(), type);
+                                }
+                            }
+                        }
+                    }
+                    ts.forEachChild(node, processNode);
+                }
+            }
+        }
+        function getClassificationTypeName(type) {
+            switch (type) {
+                case 1 /* comment */: return ClassificationTypeNames.comment;
+                case 2 /* identifier */: return ClassificationTypeNames.identifier;
+                case 3 /* keyword */: return ClassificationTypeNames.keyword;
+                case 4 /* numericLiteral */: return ClassificationTypeNames.numericLiteral;
+                case 5 /* operator */: return ClassificationTypeNames.operator;
+                case 6 /* stringLiteral */: return ClassificationTypeNames.stringLiteral;
+                case 8 /* whiteSpace */: return ClassificationTypeNames.whiteSpace;
+                case 9 /* text */: return ClassificationTypeNames.text;
+                case 10 /* punctuation */: return ClassificationTypeNames.punctuation;
+                case 11 /* className */: return ClassificationTypeNames.className;
+                case 12 /* enumName */: return ClassificationTypeNames.enumName;
+                case 13 /* interfaceName */: return ClassificationTypeNames.interfaceName;
+                case 14 /* moduleName */: return ClassificationTypeNames.moduleName;
+                case 15 /* typeParameterName */: return ClassificationTypeNames.typeParameterName;
+                case 16 /* typeAliasName */: return ClassificationTypeNames.typeAliasName;
+                case 17 /* parameterName */: return ClassificationTypeNames.parameterName;
+                case 18 /* docCommentTagName */: return ClassificationTypeNames.docCommentTagName;
+                case 19 /* jsxOpenTagName */: return ClassificationTypeNames.jsxOpenTagName;
+                case 20 /* jsxCloseTagName */: return ClassificationTypeNames.jsxCloseTagName;
+                case 21 /* jsxSelfClosingTagName */: return ClassificationTypeNames.jsxSelfClosingTagName;
+                case 22 /* jsxAttribute */: return ClassificationTypeNames.jsxAttribute;
+                case 23 /* jsxText */: return ClassificationTypeNames.jsxText;
+                case 24 /* jsxAttributeStringLiteralValue */: return ClassificationTypeNames.jsxAttributeStringLiteralValue;
+            }
+        }
+        function convertClassifications(classifications) {
+            ts.Debug.assert(classifications.spans.length % 3 === 0);
+            var dense = classifications.spans;
+            var result = [];
+            for (var i = 0, n = dense.length; i < n; i += 3) {
+                result.push({
+                    textSpan: ts.createTextSpan(dense[i], dense[i + 1]),
+                    classificationType: getClassificationTypeName(dense[i + 2])
+                });
+            }
+            return result;
+        }
+        function getSyntacticClassifications(fileName, span) {
+            return convertClassifications(getEncodedSyntacticClassifications(fileName, span));
+        }
+        function getEncodedSyntacticClassifications(fileName, span) {
+            // doesn't use compiler - no need to synchronize with host
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            var spanStart = span.start;
+            var spanLength = span.length;
+            // Make a scanner we can get trivia from.
+            var triviaScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
+            var mergeConflictScanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false, sourceFile.languageVariant, sourceFile.text);
+            var result = [];
+            processElement(sourceFile);
+            return { spans: result, endOfLineState: 0 /* None */ };
+            function pushClassification(start, length, type) {
+                result.push(start);
+                result.push(length);
+                result.push(type);
+            }
+            function classifyLeadingTriviaAndGetTokenStart(token) {
+                triviaScanner.setTextPos(token.pos);
+                while (true) {
+                    var start = triviaScanner.getTextPos();
+                    // only bother scanning if we have something that could be trivia.
+                    if (!ts.couldStartTrivia(sourceFile.text, start)) {
+                        return start;
+                    }
+                    var kind = triviaScanner.scan();
+                    var end = triviaScanner.getTextPos();
+                    var width = end - start;
+                    // The moment we get something that isn't trivia, then stop processing.
+                    if (!ts.isTrivia(kind)) {
+                        return start;
+                    }
+                    // Don't bother with newlines/whitespace.
+                    if (kind === 4 /* NewLineTrivia */ || kind === 5 /* WhitespaceTrivia */) {
+                        continue;
+                    }
+                    // Only bother with the trivia if it at least intersects the span of interest.
+                    if (ts.isComment(kind)) {
+                        classifyComment(token, kind, start, width);
+                        // Classifying a comment might cause us to reuse the trivia scanner
+                        // (because of jsdoc comments).  So after we classify the comment make
+                        // sure we set the scanner position back to where it needs to be.
+                        triviaScanner.setTextPos(end);
+                        continue;
+                    }
+                    if (kind === 7 /* ConflictMarkerTrivia */) {
+                        var text = sourceFile.text;
+                        var ch = text.charCodeAt(start);
+                        // for the <<<<<<< and >>>>>>> markers, we just add them in as comments
+                        // in the classification stream.
+                        if (ch === 60 /* lessThan */ || ch === 62 /* greaterThan */) {
+                            pushClassification(start, width, 1 /* comment */);
+                            continue;
+                        }
+                        // for the ======== add a comment for the first line, and then lex all
+                        // subsequent lines up until the end of the conflict marker.
+                        ts.Debug.assert(ch === 61 /* equals */);
+                        classifyDisabledMergeCode(text, start, end);
+                    }
+                }
+            }
+            function classifyComment(token, kind, start, width) {
+                if (kind === 3 /* MultiLineCommentTrivia */) {
+                    // See if this is a doc comment.  If so, we'll classify certain portions of it
+                    // specially.
+                    var docCommentAndDiagnostics = ts.parseIsolatedJSDocComment(sourceFile.text, start, width);
+                    if (docCommentAndDiagnostics && docCommentAndDiagnostics.jsDocComment) {
+                        docCommentAndDiagnostics.jsDocComment.parent = token;
+                        classifyJSDocComment(docCommentAndDiagnostics.jsDocComment);
+                        return;
+                    }
+                }
+                // Simple comment.  Just add as is.
+                pushCommentRange(start, width);
+            }
+            function pushCommentRange(start, width) {
+                pushClassification(start, width, 1 /* comment */);
+            }
+            function classifyJSDocComment(docComment) {
+                var pos = docComment.pos;
+                for (var _i = 0, _a = docComment.tags; _i < _a.length; _i++) {
+                    var tag = _a[_i];
+                    // As we walk through each tag, classify the portion of text from the end of
+                    // the last tag (or the start of the entire doc comment) as 'comment'.
+                    if (tag.pos !== pos) {
+                        pushCommentRange(pos, tag.pos - pos);
+                    }
+                    pushClassification(tag.atToken.pos, tag.atToken.end - tag.atToken.pos, 10 /* punctuation */);
+                    pushClassification(tag.tagName.pos, tag.tagName.end - tag.tagName.pos, 18 /* docCommentTagName */);
+                    pos = tag.tagName.end;
+                    switch (tag.kind) {
+                        case 275 /* JSDocParameterTag */:
+                            processJSDocParameterTag(tag);
+                            break;
+                        case 278 /* JSDocTemplateTag */:
+                            processJSDocTemplateTag(tag);
+                            break;
+                        case 277 /* JSDocTypeTag */:
+                            processElement(tag.typeExpression);
+                            break;
+                        case 276 /* JSDocReturnTag */:
+                            processElement(tag.typeExpression);
+                            break;
+                    }
+                    pos = tag.end;
+                }
+                if (pos !== docComment.end) {
+                    pushCommentRange(pos, docComment.end - pos);
+                }
+                return;
+                function processJSDocParameterTag(tag) {
+                    if (tag.preParameterName) {
+                        pushCommentRange(pos, tag.preParameterName.pos - pos);
+                        pushClassification(tag.preParameterName.pos, tag.preParameterName.end - tag.preParameterName.pos, 17 /* parameterName */);
+                        pos = tag.preParameterName.end;
+                    }
+                    if (tag.typeExpression) {
+                        pushCommentRange(pos, tag.typeExpression.pos - pos);
+                        processElement(tag.typeExpression);
+                        pos = tag.typeExpression.end;
+                    }
+                    if (tag.postParameterName) {
+                        pushCommentRange(pos, tag.postParameterName.pos - pos);
+                        pushClassification(tag.postParameterName.pos, tag.postParameterName.end - tag.postParameterName.pos, 17 /* parameterName */);
+                        pos = tag.postParameterName.end;
+                    }
+                }
+            }
+            function processJSDocTemplateTag(tag) {
+                for (var _i = 0, _a = tag.getChildren(); _i < _a.length; _i++) {
+                    var child = _a[_i];
+                    processElement(child);
+                }
+            }
+            function classifyDisabledMergeCode(text, start, end) {
+                // Classify the line that the ======= marker is on as a comment.  Then just lex
+                // all further tokens and add them to the result.
+                var i;
+                for (i = start; i < end; i++) {
+                    if (ts.isLineBreak(text.charCodeAt(i))) {
+                        break;
+                    }
+                }
+                pushClassification(start, i - start, 1 /* comment */);
+                mergeConflictScanner.setTextPos(i);
+                while (mergeConflictScanner.getTextPos() < end) {
+                    classifyDisabledCodeToken();
+                }
+            }
+            function classifyDisabledCodeToken() {
+                var start = mergeConflictScanner.getTextPos();
+                var tokenKind = mergeConflictScanner.scan();
+                var end = mergeConflictScanner.getTextPos();
+                var type = classifyTokenType(tokenKind);
+                if (type) {
+                    pushClassification(start, end - start, type);
+                }
+            }
+            /**
+             * Returns true if node should be treated as classified and no further processing is required.
+             * False will mean that node is not classified and traverse routine should recurse into node contents.
+             */
+            function tryClassifyNode(node) {
+                if (ts.nodeIsMissing(node)) {
+                    return true;
+                }
+                var classifiedElementName = tryClassifyJsxElementName(node);
+                if (!ts.isToken(node) && node.kind !== 244 /* JsxText */ && classifiedElementName === undefined) {
+                    return false;
+                }
+                var tokenStart = node.kind === 244 /* JsxText */ ? node.pos : classifyLeadingTriviaAndGetTokenStart(node);
+                var tokenWidth = node.end - tokenStart;
+                ts.Debug.assert(tokenWidth >= 0);
+                if (tokenWidth > 0) {
+                    var type = classifiedElementName || classifyTokenType(node.kind, node);
+                    if (type) {
+                        pushClassification(tokenStart, tokenWidth, type);
+                    }
+                }
+                return true;
+            }
+            function tryClassifyJsxElementName(token) {
+                switch (token.parent && token.parent.kind) {
+                    case 243 /* JsxOpeningElement */:
+                        if (token.parent.tagName === token) {
+                            return 19 /* jsxOpenTagName */;
+                        }
+                        break;
+                    case 245 /* JsxClosingElement */:
+                        if (token.parent.tagName === token) {
+                            return 20 /* jsxCloseTagName */;
+                        }
+                        break;
+                    case 242 /* JsxSelfClosingElement */:
+                        if (token.parent.tagName === token) {
+                            return 21 /* jsxSelfClosingTagName */;
+                        }
+                        break;
+                    case 246 /* JsxAttribute */:
+                        if (token.parent.name === token) {
+                            return 22 /* jsxAttribute */;
+                        }
+                        break;
+                }
+                return undefined;
+            }
+            // for accurate classification, the actual token should be passed in.  however, for
+            // cases like 'disabled merge code' classification, we just get the token kind and
+            // classify based on that instead.
+            function classifyTokenType(tokenKind, token) {
+                if (ts.isKeyword(tokenKind)) {
+                    return 3 /* keyword */;
+                }
+                // Special case < and >  If they appear in a generic context they are punctuation,
+                // not operators.
+                if (tokenKind === 25 /* LessThanToken */ || tokenKind === 27 /* GreaterThanToken */) {
+                    // If the node owning the token has a type argument list or type parameter list, then
+                    // we can effectively assume that a '<' and '>' belong to those lists.
+                    if (token && ts.getTypeArgumentOrTypeParameterList(token.parent)) {
+                        return 10 /* punctuation */;
+                    }
+                }
+                if (ts.isPunctuation(tokenKind)) {
+                    if (token) {
+                        if (tokenKind === 56 /* EqualsToken */) {
+                            // the '=' in a variable declaration is special cased here.
+                            if (token.parent.kind === 218 /* VariableDeclaration */ ||
+                                token.parent.kind === 145 /* PropertyDeclaration */ ||
+                                token.parent.kind === 142 /* Parameter */ ||
+                                token.parent.kind === 246 /* JsxAttribute */) {
+                                return 5 /* operator */;
+                            }
+                        }
+                        if (token.parent.kind === 187 /* BinaryExpression */ ||
+                            token.parent.kind === 185 /* PrefixUnaryExpression */ ||
+                            token.parent.kind === 186 /* PostfixUnaryExpression */ ||
+                            token.parent.kind === 188 /* ConditionalExpression */) {
+                            return 5 /* operator */;
+                        }
+                    }
+                    return 10 /* punctuation */;
+                }
+                else if (tokenKind === 8 /* NumericLiteral */) {
+                    return 4 /* numericLiteral */;
+                }
+                else if (tokenKind === 9 /* StringLiteral */ || tokenKind === 166 /* StringLiteralType */) {
+                    return token.parent.kind === 246 /* JsxAttribute */ ? 24 /* jsxAttributeStringLiteralValue */ : 6 /* stringLiteral */;
+                }
+                else if (tokenKind === 10 /* RegularExpressionLiteral */) {
+                    // TODO: we should get another classification type for these literals.
+                    return 6 /* stringLiteral */;
+                }
+                else if (ts.isTemplateLiteralKind(tokenKind)) {
+                    // TODO (drosen): we should *also* get another classification type for these literals.
+                    return 6 /* stringLiteral */;
+                }
+                else if (tokenKind === 244 /* JsxText */) {
+                    return 23 /* jsxText */;
+                }
+                else if (tokenKind === 69 /* Identifier */) {
+                    if (token) {
+                        switch (token.parent.kind) {
+                            case 221 /* ClassDeclaration */:
+                                if (token.parent.name === token) {
+                                    return 11 /* className */;
+                                }
+                                return;
+                            case 141 /* TypeParameter */:
+                                if (token.parent.name === token) {
+                                    return 15 /* typeParameterName */;
+                                }
+                                return;
+                            case 222 /* InterfaceDeclaration */:
+                                if (token.parent.name === token) {
+                                    return 13 /* interfaceName */;
+                                }
+                                return;
+                            case 224 /* EnumDeclaration */:
+                                if (token.parent.name === token) {
+                                    return 12 /* enumName */;
+                                }
+                                return;
+                            case 225 /* ModuleDeclaration */:
+                                if (token.parent.name === token) {
+                                    return 14 /* moduleName */;
+                                }
+                                return;
+                            case 142 /* Parameter */:
+                                if (token.parent.name === token) {
+                                    return 17 /* parameterName */;
+                                }
+                                return;
+                        }
+                    }
+                    return 2 /* identifier */;
+                }
+            }
+            function processElement(element) {
+                if (!element) {
+                    return;
+                }
+                // Ignore nodes that don't intersect the original span to classify.
+                if (ts.decodedTextSpanIntersectsWith(spanStart, spanLength, element.pos, element.getFullWidth())) {
+                    checkForClassificationCancellation(element.kind);
+                    var children = element.getChildren(sourceFile);
+                    for (var i = 0, n = children.length; i < n; i++) {
+                        var child = children[i];
+                        if (!tryClassifyNode(child)) {
+                            // Recurse into our child nodes.
+                            processElement(child);
+                        }
+                    }
+                }
+            }
+        }
+        function getOutliningSpans(fileName) {
+            // doesn't use compiler - no need to synchronize with host
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.OutliningElementsCollector.collectElements(sourceFile);
+        }
+        function getBraceMatchingAtPosition(fileName, position) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            var result = [];
+            var token = ts.getTouchingToken(sourceFile, position);
+            if (token.getStart(sourceFile) === position) {
+                var matchKind = getMatchingTokenKind(token);
+                // Ensure that there is a corresponding token to match ours.
+                if (matchKind) {
+                    var parentElement = token.parent;
+                    var childNodes = parentElement.getChildren(sourceFile);
+                    for (var _i = 0, childNodes_1 = childNodes; _i < childNodes_1.length; _i++) {
+                        var current = childNodes_1[_i];
+                        if (current.kind === matchKind) {
+                            var range1 = ts.createTextSpan(token.getStart(sourceFile), token.getWidth(sourceFile));
+                            var range2 = ts.createTextSpan(current.getStart(sourceFile), current.getWidth(sourceFile));
+                            // We want to order the braces when we return the result.
+                            if (range1.start < range2.start) {
+                                result.push(range1, range2);
+                            }
+                            else {
+                                result.push(range2, range1);
+                            }
+                            break;
+                        }
+                    }
+                }
+            }
+            return result;
+            function getMatchingTokenKind(token) {
+                switch (token.kind) {
+                    case 15 /* OpenBraceToken */: return 16 /* CloseBraceToken */;
+                    case 17 /* OpenParenToken */: return 18 /* CloseParenToken */;
+                    case 19 /* OpenBracketToken */: return 20 /* CloseBracketToken */;
+                    case 25 /* LessThanToken */: return 27 /* GreaterThanToken */;
+                    case 16 /* CloseBraceToken */: return 15 /* OpenBraceToken */;
+                    case 18 /* CloseParenToken */: return 17 /* OpenParenToken */;
+                    case 20 /* CloseBracketToken */: return 19 /* OpenBracketToken */;
+                    case 27 /* GreaterThanToken */: return 25 /* LessThanToken */;
+                }
+                return undefined;
+            }
+        }
+        function getIndentationAtPosition(fileName, position, editorOptions) {
+            var start = new Date().getTime();
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            log("getIndentationAtPosition: getCurrentSourceFile: " + (new Date().getTime() - start));
+            start = new Date().getTime();
+            var result = ts.formatting.SmartIndenter.getIndentation(position, sourceFile, editorOptions);
+            log("getIndentationAtPosition: computeIndentation  : " + (new Date().getTime() - start));
+            return result;
+        }
+        function getFormattingEditsForRange(fileName, start, end, options) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.formatting.formatSelection(start, end, sourceFile, getRuleProvider(options), options);
+        }
+        function getFormattingEditsForDocument(fileName, options) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            return ts.formatting.formatDocument(sourceFile, getRuleProvider(options), options);
+        }
+        function getFormattingEditsAfterKeystroke(fileName, position, key, options) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            if (key === "}") {
+                return ts.formatting.formatOnClosingCurly(position, sourceFile, getRuleProvider(options), options);
+            }
+            else if (key === ";") {
+                return ts.formatting.formatOnSemicolon(position, sourceFile, getRuleProvider(options), options);
+            }
+            else if (key === "\n") {
+                return ts.formatting.formatOnEnter(position, sourceFile, getRuleProvider(options), options);
+            }
+            return [];
+        }
+        /**
+         * Checks if position points to a valid position to add JSDoc comments, and if so,
+         * returns the appropriate template. Otherwise returns an empty string.
+         * Valid positions are
+         *      - outside of comments, statements, and expressions, and
+         *      - preceding a:
+         *          - function/constructor/method declaration
+         *          - class declarations
+         *          - variable statements
+         *          - namespace declarations
+         *
+         * Hosts should ideally check that:
+         * - The line is all whitespace up to 'position' before performing the insertion.
+         * - If the keystroke sequence "/\*\*" induced the call, we also check that the next
+         * non-whitespace character is '*', which (approximately) indicates whether we added
+         * the second '*' to complete an existing (JSDoc) comment.
+         * @param fileName The file in which to perform the check.
+         * @param position The (character-indexed) position in the file where the check should
+         * be performed.
+         */
+        function getDocCommentTemplateAtPosition(fileName, position) {
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            // Check if in a context where we don't want to perform any insertion
+            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position) || ts.hasDocComment(sourceFile, position)) {
+                return undefined;
+            }
+            var tokenAtPos = ts.getTokenAtPosition(sourceFile, position);
+            var tokenStart = tokenAtPos.getStart();
+            if (!tokenAtPos || tokenStart < position) {
+                return undefined;
+            }
+            // TODO: add support for:
+            // - enums/enum members
+            // - interfaces
+            // - property declarations
+            // - potentially property assignments
+            var commentOwner;
+            findOwner: for (commentOwner = tokenAtPos; commentOwner; commentOwner = commentOwner.parent) {
+                switch (commentOwner.kind) {
+                    case 220 /* FunctionDeclaration */:
+                    case 147 /* MethodDeclaration */:
+                    case 148 /* Constructor */:
+                    case 221 /* ClassDeclaration */:
+                    case 200 /* VariableStatement */:
+                        break findOwner;
+                    case 256 /* SourceFile */:
+                        return undefined;
+                    case 225 /* ModuleDeclaration */:
+                        // If in walking up the tree, we hit a a nested namespace declaration,
+                        // then we must be somewhere within a dotted namespace name; however we don't
+                        // want to give back a JSDoc template for the 'b' or 'c' in 'namespace a.b.c { }'.
+                        if (commentOwner.parent.kind === 225 /* ModuleDeclaration */) {
+                            return undefined;
+                        }
+                        break findOwner;
+                }
+            }
+            if (!commentOwner || commentOwner.getStart() < position) {
+                return undefined;
+            }
+            var parameters = getParametersForJsDocOwningNode(commentOwner);
+            var posLineAndChar = sourceFile.getLineAndCharacterOfPosition(position);
+            var lineStart = sourceFile.getLineStarts()[posLineAndChar.line];
+            var indentationStr = sourceFile.text.substr(lineStart, posLineAndChar.character);
+            var newLine = ts.getNewLineOrDefaultFromHost(host);
+            var docParams = "";
+            for (var i = 0, numParams = parameters.length; i < numParams; i++) {
+                var currentName = parameters[i].name;
+                var paramName = currentName.kind === 69 /* Identifier */ ?
+                    currentName.text :
+                    "param" + i;
+                docParams += indentationStr + " * @param " + paramName + newLine;
+            }
+            // A doc comment consists of the following
+            // * The opening comment line
+            // * the first line (without a param) for the object's untagged info (this is also where the caret ends up)
+            // * the '@param'-tagged lines
+            // * TODO: other tags.
+            // * the closing comment line
+            // * if the caret was directly in front of the object, then we add an extra line and indentation.
+            var preamble = "/**" + newLine +
+                indentationStr + " * ";
+            var result = preamble + newLine +
+                docParams +
+                indentationStr + " */" +
+                (tokenStart === position ? newLine + indentationStr : "");
+            return { newText: result, caretOffset: preamble.length };
+        }
+        function isValidBraceCompletionAtPostion(fileName, position, openingBrace) {
+            // '<' is currently not supported, figuring out if we're in a Generic Type vs. a comparison is too
+            // expensive to do during typing scenarios
+            // i.e. whether we're dealing with:
+            //      var x = new foo<| ( with class foo<T>{} )
+            // or
+            //      var y = 3 <|
+            if (openingBrace === 60 /* lessThan */) {
+                return false;
+            }
+            var sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
+            // Check if in a context where we don't want to perform any insertion
+            if (ts.isInString(sourceFile, position) || ts.isInComment(sourceFile, position)) {
+                return false;
+            }
+            if (ts.isInsideJsxElementOrAttribute(sourceFile, position)) {
+                return openingBrace === 123 /* openBrace */;
+            }
+            if (ts.isInTemplateString(sourceFile, position)) {
+                return false;
+            }
+            return true;
+        }
+        function getParametersForJsDocOwningNode(commentOwner) {
+            if (ts.isFunctionLike(commentOwner)) {
+                return commentOwner.parameters;
+            }
+            if (commentOwner.kind === 200 /* VariableStatement */) {
+                var varStatement = commentOwner;
+                var varDeclarations = varStatement.declarationList.declarations;
+                if (varDeclarations.length === 1 && varDeclarations[0].initializer) {
+                    return getParametersFromRightHandSideOfAssignment(varDeclarations[0].initializer);
+                }
+            }
+            return emptyArray;
+        }
+        /**
+         * Digs into an an initializer or RHS operand of an assignment operation
+         * to get the parameters of an apt signature corresponding to a
+         * function expression or a class expression.
+         *
+         * @param rightHandSide the expression which may contain an appropriate set of parameters
+         * @returns the parameters of a signature found on the RHS if one exists; otherwise 'emptyArray'.
+         */
+        function getParametersFromRightHandSideOfAssignment(rightHandSide) {
+            while (rightHandSide.kind === 178 /* ParenthesizedExpression */) {
+                rightHandSide = rightHandSide.expression;
+            }
+            switch (rightHandSide.kind) {
+                case 179 /* FunctionExpression */:
+                case 180 /* ArrowFunction */:
+                    return rightHandSide.parameters;
+                case 192 /* ClassExpression */:
+                    for (var _i = 0, _a = rightHandSide.members; _i < _a.length; _i++) {
+                        var member = _a[_i];
+                        if (member.kind === 148 /* Constructor */) {
+                            return member.parameters;
+                        }
+                    }
+                    break;
+            }
+            return emptyArray;
+        }
+        function getTodoComments(fileName, descriptors) {
+            // Note: while getting todo comments seems like a syntactic operation, we actually
+            // treat it as a semantic operation here.  This is because we expect our host to call
+            // this on every single file.  If we treat this syntactically, then that will cause
+            // us to populate and throw away the tree in our syntax tree cache for each file.  By
+            // treating this as a semantic operation, we can access any tree without throwing
+            // anything away.
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            cancellationToken.throwIfCancellationRequested();
+            var fileContents = sourceFile.text;
+            var result = [];
+            if (descriptors.length > 0) {
+                var regExp = getTodoCommentsRegExp();
+                var matchArray = void 0;
+                while (matchArray = regExp.exec(fileContents)) {
+                    cancellationToken.throwIfCancellationRequested();
+                    // If we got a match, here is what the match array will look like.  Say the source text is:
+                    //
+                    //      "    // hack   1"
+                    //
+                    // The result array with the regexp:    will be:
+                    //
+                    //      ["// hack   1", "// ", "hack   1", undefined, "hack"]
+                    //
+                    // Here are the relevant capture groups:
+                    //  0) The full match for the entire regexp.
+                    //  1) The preamble to the message portion.
+                    //  2) The message portion.
+                    //  3...N) The descriptor that was matched - by index.  'undefined' for each
+                    //         descriptor that didn't match.  an actual value if it did match.
+                    //
+                    //  i.e. 'undefined' in position 3 above means TODO(jason) didn't match.
+                    //       "hack"      in position 4 means HACK did match.
+                    var firstDescriptorCaptureIndex = 3;
+                    ts.Debug.assert(matchArray.length === descriptors.length + firstDescriptorCaptureIndex);
+                    var preamble = matchArray[1];
+                    var matchPosition = matchArray.index + preamble.length;
+                    // OK, we have found a match in the file.  This is only an acceptable match if
+                    // it is contained within a comment.
+                    var token = ts.getTokenAtPosition(sourceFile, matchPosition);
+                    if (!isInsideComment(sourceFile, token, matchPosition)) {
+                        continue;
+                    }
+                    var descriptor = undefined;
+                    for (var i = 0, n = descriptors.length; i < n; i++) {
+                        if (matchArray[i + firstDescriptorCaptureIndex]) {
+                            descriptor = descriptors[i];
+                        }
+                    }
+                    ts.Debug.assert(descriptor !== undefined);
+                    // We don't want to match something like 'TODOBY', so we make sure a non
+                    // letter/digit follows the match.
+                    if (isLetterOrDigit(fileContents.charCodeAt(matchPosition + descriptor.text.length))) {
+                        continue;
+                    }
+                    var message = matchArray[2];
+                    result.push({
+                        descriptor: descriptor,
+                        message: message,
+                        position: matchPosition
+                    });
+                }
+            }
+            return result;
+            function escapeRegExp(str) {
+                return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
+            }
+            function getTodoCommentsRegExp() {
+                // NOTE: ?:  means 'non-capture group'.  It allows us to have groups without having to
+                // filter them out later in the final result array.
+                // TODO comments can appear in one of the following forms:
+                //
+                //  1)      // TODO     or  /////////// TODO
+                //
+                //  2)      /* TODO     or  /********** TODO
+                //
+                //  3)      /*
+                //           *   TODO
+                //           */
+                //
+                // The following three regexps are used to match the start of the text up to the TODO
+                // comment portion.
+                var singleLineCommentStart = /(?:\/\/+\s*)/.source;
+                var multiLineCommentStart = /(?:\/\*+\s*)/.source;
+                var anyNumberOfSpacesAndAsterisksAtStartOfLine = /(?:^(?:\s|\*)*)/.source;
+                // Match any of the above three TODO comment start regexps.
+                // Note that the outermost group *is* a capture group.  We want to capture the preamble
+                // so that we can determine the starting position of the TODO comment match.
+                var preamble = "(" + anyNumberOfSpacesAndAsterisksAtStartOfLine + "|" + singleLineCommentStart + "|" + multiLineCommentStart + ")";
+                // Takes the descriptors and forms a regexp that matches them as if they were literals.
+                // For example, if the descriptors are "TODO(jason)" and "HACK", then this will be:
+                //
+                //      (?:(TODO\(jason\))|(HACK))
+                //
+                // Note that the outermost group is *not* a capture group, but the innermost groups
+                // *are* capture groups.  By capturing the inner literals we can determine after
+                // matching which descriptor we are dealing with.
+                var literals = "(?:" + ts.map(descriptors, function (d) { return "(" + escapeRegExp(d.text) + ")"; }).join("|") + ")";
+                // After matching a descriptor literal, the following regexp matches the rest of the
+                // text up to the end of the line (or */).
+                var endOfLineOrEndOfComment = /(?:$|\*\/)/.source;
+                var messageRemainder = /(?:.*?)/.source;
+                // This is the portion of the match we'll return as part of the TODO comment result. We
+                // match the literal portion up to the end of the line or end of comment.
+                var messagePortion = "(" + literals + messageRemainder + ")";
+                var regExpString = preamble + messagePortion + endOfLineOrEndOfComment;
+                // The final regexp will look like this:
+                // /((?:\/\/+\s*)|(?:\/\*+\s*)|(?:^(?:\s|\*)*))((?:(TODO\(jason\))|(HACK))(?:.*?))(?:$|\*\/)/gim
+                // The flags of the regexp are important here.
+                //  'g' is so that we are doing a global search and can find matches several times
+                //  in the input.
+                //
+                //  'i' is for case insensitivity (We do this to match C# TODO comment code).
+                //
+                //  'm' is so we can find matches in a multi-line input.
+                return new RegExp(regExpString, "gim");
+            }
+            function isLetterOrDigit(char) {
+                return (char >= 97 /* a */ && char <= 122 /* z */) ||
+                    (char >= 65 /* A */ && char <= 90 /* Z */) ||
+                    (char >= 48 /* _0 */ && char <= 57 /* _9 */);
+            }
+        }
+        function getStringLiteralTypeForNode(node, typeChecker) {
+            var searchNode = node.parent.kind === 166 /* StringLiteralType */ ? node.parent : node;
+            var type = typeChecker.getTypeAtLocation(searchNode);
+            if (type && type.flags & 256 /* StringLiteral */) {
+                return type;
+            }
+            return undefined;
+        }
+        function getRenameInfo(fileName, position) {
+            synchronizeHostData();
+            var sourceFile = getValidSourceFile(fileName);
+            var typeChecker = program.getTypeChecker();
+            var defaultLibFileName = host.getDefaultLibFileName(host.getCompilationSettings());
+            var canonicalDefaultLibName = getCanonicalFileName(ts.normalizePath(defaultLibFileName));
+            var node = ts.getTouchingWord(sourceFile, position, /*includeJsDocComment*/ true);
+            // Can only rename an identifier.
+            if (node) {
+                if (node.kind === 69 /* Identifier */ ||
+                    node.kind === 9 /* StringLiteral */ ||
+                    isLiteralNameOfPropertyDeclarationOrIndexAccess(node)) {
+                    var symbol = typeChecker.getSymbolAtLocation(node);
+                    // Only allow a symbol to be renamed if it actually has at least one declaration.
+                    if (symbol) {
+                        var declarations = symbol.getDeclarations();
+                        if (declarations && declarations.length > 0) {
+                            // Disallow rename for elements that are defined in the standard TypeScript library.
+                            if (ts.forEach(declarations, isDefinedInLibraryFile)) {
+                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
+                            }
+                            var displayName = ts.stripQuotes(ts.getDeclaredName(typeChecker, symbol, node));
+                            var kind = getSymbolKind(symbol, node);
+                            if (kind) {
+                                return {
+                                    canRename: true,
+                                    kind: kind,
+                                    displayName: displayName,
+                                    localizedErrorMessage: undefined,
+                                    fullDisplayName: typeChecker.getFullyQualifiedName(symbol),
+                                    kindModifiers: getSymbolModifiers(symbol),
+                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
+                                };
+                            }
+                        }
+                    }
+                    else if (node.kind === 9 /* StringLiteral */) {
+                        var type = getStringLiteralTypeForNode(node, typeChecker);
+                        if (type) {
+                            if (isDefinedInLibraryFile(node)) {
+                                return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_elements_that_are_defined_in_the_standard_TypeScript_library));
+                            }
+                            else {
+                                var displayName = ts.stripQuotes(type.text);
+                                return {
+                                    canRename: true,
+                                    kind: ScriptElementKind.variableElement,
+                                    displayName: displayName,
+                                    localizedErrorMessage: undefined,
+                                    fullDisplayName: displayName,
+                                    kindModifiers: ScriptElementKindModifier.none,
+                                    triggerSpan: createTriggerSpanForNode(node, sourceFile)
+                                };
+                            }
+                        }
+                    }
+                }
+            }
+            return getRenameInfoError(ts.getLocaleSpecificMessage(ts.Diagnostics.You_cannot_rename_this_element));
+            function getRenameInfoError(localizedErrorMessage) {
+                return {
+                    canRename: false,
+                    localizedErrorMessage: localizedErrorMessage,
+                    displayName: undefined,
+                    fullDisplayName: undefined,
+                    kind: undefined,
+                    kindModifiers: undefined,
+                    triggerSpan: undefined
+                };
+            }
+            function isDefinedInLibraryFile(declaration) {
+                if (defaultLibFileName) {
+                    var sourceFile_2 = declaration.getSourceFile();
+                    var canonicalName = getCanonicalFileName(ts.normalizePath(sourceFile_2.fileName));
+                    if (canonicalName === canonicalDefaultLibName) {
+                        return true;
+                    }
+                }
+                return false;
+            }
+            function createTriggerSpanForNode(node, sourceFile) {
+                var start = node.getStart(sourceFile);
+                var width = node.getWidth(sourceFile);
+                if (node.kind === 9 /* StringLiteral */) {
+                    // Exclude the quotes
+                    start += 1;
+                    width -= 2;
+                }
+                return ts.createTextSpan(start, width);
+            }
+        }
+        return {
+            dispose: dispose,
+            cleanupSemanticCache: cleanupSemanticCache,
+            getSyntacticDiagnostics: getSyntacticDiagnostics,
+            getSemanticDiagnostics: getSemanticDiagnostics,
+            getCompilerOptionsDiagnostics: getCompilerOptionsDiagnostics,
+            getSyntacticClassifications: getSyntacticClassifications,
+            getSemanticClassifications: getSemanticClassifications,
+            getEncodedSyntacticClassifications: getEncodedSyntacticClassifications,
+            getEncodedSemanticClassifications: getEncodedSemanticClassifications,
+            getCompletionsAtPosition: getCompletionsAtPosition,
+            getCompletionEntryDetails: getCompletionEntryDetails,
+            getSignatureHelpItems: getSignatureHelpItems,
+            getQuickInfoAtPosition: getQuickInfoAtPosition,
+            getDefinitionAtPosition: getDefinitionAtPosition,
+            getTypeDefinitionAtPosition: getTypeDefinitionAtPosition,
+            getReferencesAtPosition: getReferencesAtPosition,
+            findReferences: findReferences,
+            getOccurrencesAtPosition: getOccurrencesAtPosition,
+            getDocumentHighlights: getDocumentHighlights,
+            getNameOrDottedNameSpan: getNameOrDottedNameSpan,
+            getBreakpointStatementAtPosition: getBreakpointStatementAtPosition,
+            getNavigateToItems: getNavigateToItems,
+            getRenameInfo: getRenameInfo,
+            findRenameLocations: findRenameLocations,
+            getNavigationBarItems: getNavigationBarItems,
+            getOutliningSpans: getOutliningSpans,
+            getTodoComments: getTodoComments,
+            getBraceMatchingAtPosition: getBraceMatchingAtPosition,
+            getIndentationAtPosition: getIndentationAtPosition,
+            getFormattingEditsForRange: getFormattingEditsForRange,
+            getFormattingEditsForDocument: getFormattingEditsForDocument,
+            getFormattingEditsAfterKeystroke: getFormattingEditsAfterKeystroke,
+            getDocCommentTemplateAtPosition: getDocCommentTemplateAtPosition,
+            isValidBraceCompletionAtPostion: isValidBraceCompletionAtPostion,
+            getEmitOutput: getEmitOutput,
+            getNonBoundSourceFile: getNonBoundSourceFile,
+            getProgram: getProgram
+        };
+    }
+    ts.createLanguageService = createLanguageService;
+    /* @internal */
+    function getNameTable(sourceFile) {
+        if (!sourceFile.nameTable) {
+            initializeNameTable(sourceFile);
+        }
+        return sourceFile.nameTable;
+    }
+    ts.getNameTable = getNameTable;
+    function initializeNameTable(sourceFile) {
+        var nameTable = {};
+        walk(sourceFile);
+        sourceFile.nameTable = nameTable;
+        function walk(node) {
+            switch (node.kind) {
+                case 69 /* Identifier */:
+                    nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
+                    break;
+                case 9 /* StringLiteral */:
+                case 8 /* NumericLiteral */:
+                    // We want to store any numbers/strings if they were a name that could be
+                    // related to a declaration.  So, if we have 'import x = require("something")'
+                    // then we want 'something' to be in the name table.  Similarly, if we have
+                    // "a['propname']" then we want to store "propname" in the name table.
+                    if (ts.isDeclarationName(node) ||
+                        node.parent.kind === 240 /* ExternalModuleReference */ ||
+                        isArgumentOfElementAccessExpression(node) ||
+                        ts.isLiteralComputedPropertyDeclarationName(node)) {
+                        nameTable[node.text] = nameTable[node.text] === undefined ? node.pos : -1;
+                    }
+                    break;
+                default:
+                    ts.forEachChild(node, walk);
+                    if (node.jsDocComments) {
+                        for (var _i = 0, _a = node.jsDocComments; _i < _a.length; _i++) {
+                            var jsDocComment = _a[_i];
+                            ts.forEachChild(jsDocComment, walk);
+                        }
+                    }
+            }
+        }
+    }
+    function isArgumentOfElementAccessExpression(node) {
+        return node &&
+            node.parent &&
+            node.parent.kind === 173 /* ElementAccessExpression */ &&
+            node.parent.argumentExpression === node;
+    }
+    /// Classifier
+    function createClassifier() {
+        var scanner = ts.createScanner(2 /* Latest */, /*skipTrivia*/ false);
+        /// We do not have a full parser support to know when we should parse a regex or not
+        /// If we consider every slash token to be a regex, we could be missing cases like "1/2/3", where
+        /// we have a series of divide operator. this list allows us to be more accurate by ruling out
+        /// locations where a regexp cannot exist.
+        var noRegexTable = [];
+        noRegexTable[69 /* Identifier */] = true;
+        noRegexTable[9 /* StringLiteral */] = true;
+        noRegexTable[8 /* NumericLiteral */] = true;
+        noRegexTable[10 /* RegularExpressionLiteral */] = true;
+        noRegexTable[97 /* ThisKeyword */] = true;
+        noRegexTable[41 /* PlusPlusToken */] = true;
+        noRegexTable[42 /* MinusMinusToken */] = true;
+        noRegexTable[18 /* CloseParenToken */] = true;
+        noRegexTable[20 /* CloseBracketToken */] = true;
+        noRegexTable[16 /* CloseBraceToken */] = true;
+        noRegexTable[99 /* TrueKeyword */] = true;
+        noRegexTable[84 /* FalseKeyword */] = true;
+        // Just a stack of TemplateHeads and OpenCurlyBraces, used to perform rudimentary (inexact)
+        // classification on template strings. Because of the context free nature of templates,
+        // the only precise way to classify a template portion would be by propagating the stack across
+        // lines, just as we do with the end-of-line state. However, this is a burden for implementers,
+        // and the behavior is entirely subsumed by the syntactic classifier anyway, so we instead
+        // flatten any nesting when the template stack is non-empty and encode it in the end-of-line state.
+        // Situations in which this fails are
+        //  1) When template strings are nested across different lines:
+        //          `hello ${ `world
+        //          ` }`
+        //
+        //     Where on the second line, you will get the closing of a template,
+        //     a closing curly, and a new template.
+        //
+        //  2) When substitution expressions have curly braces and the curly brace falls on the next line:
+        //          `hello ${ () => {
+        //          return "world" } } `
+        //
+        //     Where on the second line, you will get the 'return' keyword,
+        //     a string literal, and a template end consisting of '} } `'.
+        var templateStack = [];
+        /** Returns true if 'keyword2' can legally follow 'keyword1' in any language construct. */
+        function canFollow(keyword1, keyword2) {
+            if (ts.isAccessibilityModifier(keyword1)) {
+                if (keyword2 === 123 /* GetKeyword */ ||
+                    keyword2 === 131 /* SetKeyword */ ||
+                    keyword2 === 121 /* ConstructorKeyword */ ||
+                    keyword2 === 113 /* StaticKeyword */) {
+                    // Allow things like "public get", "public constructor" and "public static".
+                    // These are all legal.
+                    return true;
+                }
+                // Any other keyword following "public" is actually an identifier an not a real
+                // keyword.
+                return false;
+            }
+            // Assume any other keyword combination is legal.  This can be refined in the future
+            // if there are more cases we want the classifier to be better at.
+            return true;
+        }
+        function convertClassifications(classifications, text) {
+            var entries = [];
+            var dense = classifications.spans;
+            var lastEnd = 0;
+            for (var i = 0, n = dense.length; i < n; i += 3) {
+                var start = dense[i];
+                var length_3 = dense[i + 1];
+                var type = dense[i + 2];
+                // Make a whitespace entry between the last item and this one.
+                if (lastEnd >= 0) {
+                    var whitespaceLength_1 = start - lastEnd;
+                    if (whitespaceLength_1 > 0) {
+                        entries.push({ length: whitespaceLength_1, classification: TokenClass.Whitespace });
+                    }
+                }
+                entries.push({ length: length_3, classification: convertClassification(type) });
+                lastEnd = start + length_3;
+            }
+            var whitespaceLength = text.length - lastEnd;
+            if (whitespaceLength > 0) {
+                entries.push({ length: whitespaceLength, classification: TokenClass.Whitespace });
+            }
+            return { entries: entries, finalLexState: classifications.endOfLineState };
+        }
+        function convertClassification(type) {
+            switch (type) {
+                case 1 /* comment */: return TokenClass.Comment;
+                case 3 /* keyword */: return TokenClass.Keyword;
+                case 4 /* numericLiteral */: return TokenClass.NumberLiteral;
+                case 5 /* operator */: return TokenClass.Operator;
+                case 6 /* stringLiteral */: return TokenClass.StringLiteral;
+                case 8 /* whiteSpace */: return TokenClass.Whitespace;
+                case 10 /* punctuation */: return TokenClass.Punctuation;
+                case 2 /* identifier */:
+                case 11 /* className */:
+                case 12 /* enumName */:
+                case 13 /* interfaceName */:
+                case 14 /* moduleName */:
+                case 15 /* typeParameterName */:
+                case 16 /* typeAliasName */:
+                case 9 /* text */:
+                case 17 /* parameterName */:
+                default:
+                    return TokenClass.Identifier;
+            }
+        }
+        function getClassificationsForLine(text, lexState, syntacticClassifierAbsent) {
+            return convertClassifications(getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent), text);
+        }
+        // If there is a syntactic classifier ('syntacticClassifierAbsent' is false),
+        // we will be more conservative in order to avoid conflicting with the syntactic classifier.
+        function getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent) {
+            var offset = 0;
+            var token = 0 /* Unknown */;
+            var lastNonTriviaToken = 0 /* Unknown */;
+            // Empty out the template stack for reuse.
+            while (templateStack.length > 0) {
+                templateStack.pop();
+            }
+            // If we're in a string literal, then prepend: "\
+            // (and a newline).  That way when we lex we'll think we're still in a string literal.
+            //
+            // If we're in a multiline comment, then prepend: /*
+            // (and a newline).  That way when we lex we'll think we're still in a multiline comment.
+            switch (lexState) {
+                case 3 /* InDoubleQuoteStringLiteral */:
+                    text = "\"\\\n" + text;
+                    offset = 3;
+                    break;
+                case 2 /* InSingleQuoteStringLiteral */:
+                    text = "'\\\n" + text;
+                    offset = 3;
+                    break;
+                case 1 /* InMultiLineCommentTrivia */:
+                    text = "/*\n" + text;
+                    offset = 3;
+                    break;
+                case 4 /* InTemplateHeadOrNoSubstitutionTemplate */:
+                    text = "`\n" + text;
+                    offset = 2;
+                    break;
+                case 5 /* InTemplateMiddleOrTail */:
+                    text = "}\n" + text;
+                    offset = 2;
+                // fallthrough
+                case 6 /* InTemplateSubstitutionPosition */:
+                    templateStack.push(12 /* TemplateHead */);
+                    break;
+            }
+            scanner.setText(text);
+            var result = {
+                endOfLineState: 0 /* None */,
+                spans: []
+            };
+            // We can run into an unfortunate interaction between the lexical and syntactic classifier
+            // when the user is typing something generic.  Consider the case where the user types:
+            //
+            //      Foo<number
+            //
+            // From the lexical classifier's perspective, 'number' is a keyword, and so the word will
+            // be classified as such.  However, from the syntactic classifier's tree-based perspective
+            // this is simply an expression with the identifier 'number' on the RHS of the less than
+            // token.  So the classification will go back to being an identifier.  The moment the user
+            // types again, number will become a keyword, then an identifier, etc. etc.
+            //
+            // To try to avoid this problem, we avoid classifying contextual keywords as keywords
+            // when the user is potentially typing something generic.  We just can't do a good enough
+            // job at the lexical level, and so well leave it up to the syntactic classifier to make
+            // the determination.
+            //
+            // In order to determine if the user is potentially typing something generic, we use a
+            // weak heuristic where we track < and > tokens.  It's a weak heuristic, but should
+            // work well enough in practice.
+            var angleBracketStack = 0;
+            do {
+                token = scanner.scan();
+                if (!ts.isTrivia(token)) {
+                    if ((token === 39 /* SlashToken */ || token === 61 /* SlashEqualsToken */) && !noRegexTable[lastNonTriviaToken]) {
+                        if (scanner.reScanSlashToken() === 10 /* RegularExpressionLiteral */) {
+                            token = 10 /* RegularExpressionLiteral */;
+                        }
+                    }
+                    else if (lastNonTriviaToken === 21 /* DotToken */ && isKeyword(token)) {
+                        token = 69 /* Identifier */;
+                    }
+                    else if (isKeyword(lastNonTriviaToken) && isKeyword(token) && !canFollow(lastNonTriviaToken, token)) {
+                        // We have two keywords in a row.  Only treat the second as a keyword if
+                        // it's a sequence that could legally occur in the language.  Otherwise
+                        // treat it as an identifier.  This way, if someone writes "private var"
+                        // we recognize that 'var' is actually an identifier here.
+                        token = 69 /* Identifier */;
+                    }
+                    else if (lastNonTriviaToken === 69 /* Identifier */ &&
+                        token === 25 /* LessThanToken */) {
+                        // Could be the start of something generic.  Keep track of that by bumping
+                        // up the current count of generic contexts we may be in.
+                        angleBracketStack++;
+                    }
+                    else if (token === 27 /* GreaterThanToken */ && angleBracketStack > 0) {
+                        // If we think we're currently in something generic, then mark that that
+                        // generic entity is complete.
+                        angleBracketStack--;
+                    }
+                    else if (token === 117 /* AnyKeyword */ ||
+                        token === 132 /* StringKeyword */ ||
+                        token === 130 /* NumberKeyword */ ||
+                        token === 120 /* BooleanKeyword */ ||
+                        token === 133 /* SymbolKeyword */) {
+                        if (angleBracketStack > 0 && !syntacticClassifierAbsent) {
+                            // If it looks like we're could be in something generic, don't classify this
+                            // as a keyword.  We may just get overwritten by the syntactic classifier,
+                            // causing a noisy experience for the user.
+                            token = 69 /* Identifier */;
+                        }
+                    }
+                    else if (token === 12 /* TemplateHead */) {
+                        templateStack.push(token);
+                    }
+                    else if (token === 15 /* OpenBraceToken */) {
+                        // If we don't have anything on the template stack,
+                        // then we aren't trying to keep track of a previously scanned template head.
+                        if (templateStack.length > 0) {
+                            templateStack.push(token);
+                        }
+                    }
+                    else if (token === 16 /* CloseBraceToken */) {
+                        // If we don't have anything on the template stack,
+                        // then we aren't trying to keep track of a previously scanned template head.
+                        if (templateStack.length > 0) {
+                            var lastTemplateStackToken = ts.lastOrUndefined(templateStack);
+                            if (lastTemplateStackToken === 12 /* TemplateHead */) {
+                                token = scanner.reScanTemplateToken();
+                                // Only pop on a TemplateTail; a TemplateMiddle indicates there is more for us.
+                                if (token === 14 /* TemplateTail */) {
+                                    templateStack.pop();
+                                }
+                                else {
+                                    ts.Debug.assert(token === 13 /* TemplateMiddle */, "Should have been a template middle. Was " + token);
+                                }
+                            }
+                            else {
+                                ts.Debug.assert(lastTemplateStackToken === 15 /* OpenBraceToken */, "Should have been an open brace. Was: " + token);
+                                templateStack.pop();
+                            }
+                        }
+                    }
+                    lastNonTriviaToken = token;
+                }
+                processToken();
+            } while (token !== 1 /* EndOfFileToken */);
+            return result;
+            function processToken() {
+                var start = scanner.getTokenPos();
+                var end = scanner.getTextPos();
+                addResult(start, end, classFromKind(token));
+                if (end >= text.length) {
+                    if (token === 9 /* StringLiteral */ || token === 166 /* StringLiteralType */) {
+                        // Check to see if we finished up on a multiline string literal.
+                        var tokenText = scanner.getTokenText();
+                        if (scanner.isUnterminated()) {
+                            var lastCharIndex = tokenText.length - 1;
+                            var numBackslashes = 0;
+                            while (tokenText.charCodeAt(lastCharIndex - numBackslashes) === 92 /* backslash */) {
+                                numBackslashes++;
+                            }
+                            // If we have an odd number of backslashes, then the multiline string is unclosed
+                            if (numBackslashes & 1) {
+                                var quoteChar = tokenText.charCodeAt(0);
+                                result.endOfLineState = quoteChar === 34 /* doubleQuote */
+                                    ? 3 /* InDoubleQuoteStringLiteral */
+                                    : 2 /* InSingleQuoteStringLiteral */;
+                            }
+                        }
+                    }
+                    else if (token === 3 /* MultiLineCommentTrivia */) {
+                        // Check to see if the multiline comment was unclosed.
+                        if (scanner.isUnterminated()) {
+                            result.endOfLineState = 1 /* InMultiLineCommentTrivia */;
+                        }
+                    }
+                    else if (ts.isTemplateLiteralKind(token)) {
+                        if (scanner.isUnterminated()) {
+                            if (token === 14 /* TemplateTail */) {
+                                result.endOfLineState = 5 /* InTemplateMiddleOrTail */;
+                            }
+                            else if (token === 11 /* NoSubstitutionTemplateLiteral */) {
+                                result.endOfLineState = 4 /* InTemplateHeadOrNoSubstitutionTemplate */;
+                            }
+                            else {
+                                ts.Debug.fail("Only 'NoSubstitutionTemplateLiteral's and 'TemplateTail's can be unterminated; got SyntaxKind #" + token);
+                            }
+                        }
+                    }
+                    else if (templateStack.length > 0 && ts.lastOrUndefined(templateStack) === 12 /* TemplateHead */) {
+                        result.endOfLineState = 6 /* InTemplateSubstitutionPosition */;
+                    }
+                }
+            }
+            function addResult(start, end, classification) {
+                if (classification === 8 /* whiteSpace */) {
+                    // Don't bother with whitespace classifications.  They're not needed.
+                    return;
+                }
+                if (start === 0 && offset > 0) {
+                    // We're classifying the first token, and this was a case where we prepended
+                    // text.  We should consider the start of this token to be at the start of
+                    // the original text.
+                    start += offset;
+                }
+                // All our tokens are in relation to the augmented text.  Move them back to be
+                // relative to the original text.
+                start -= offset;
+                end -= offset;
+                var length = end - start;
+                if (length > 0) {
+                    result.spans.push(start);
+                    result.spans.push(length);
+                    result.spans.push(classification);
+                }
+            }
+        }
+        function isBinaryExpressionOperatorToken(token) {
+            switch (token) {
+                case 37 /* AsteriskToken */:
+                case 39 /* SlashToken */:
+                case 40 /* PercentToken */:
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                case 43 /* LessThanLessThanToken */:
+                case 44 /* GreaterThanGreaterThanToken */:
+                case 45 /* GreaterThanGreaterThanGreaterThanToken */:
+                case 25 /* LessThanToken */:
+                case 27 /* GreaterThanToken */:
+                case 28 /* LessThanEqualsToken */:
+                case 29 /* GreaterThanEqualsToken */:
+                case 91 /* InstanceOfKeyword */:
+                case 90 /* InKeyword */:
+                case 116 /* AsKeyword */:
+                case 30 /* EqualsEqualsToken */:
+                case 31 /* ExclamationEqualsToken */:
+                case 32 /* EqualsEqualsEqualsToken */:
+                case 33 /* ExclamationEqualsEqualsToken */:
+                case 46 /* AmpersandToken */:
+                case 48 /* CaretToken */:
+                case 47 /* BarToken */:
+                case 51 /* AmpersandAmpersandToken */:
+                case 52 /* BarBarToken */:
+                case 67 /* BarEqualsToken */:
+                case 66 /* AmpersandEqualsToken */:
+                case 68 /* CaretEqualsToken */:
+                case 63 /* LessThanLessThanEqualsToken */:
+                case 64 /* GreaterThanGreaterThanEqualsToken */:
+                case 65 /* GreaterThanGreaterThanGreaterThanEqualsToken */:
+                case 57 /* PlusEqualsToken */:
+                case 58 /* MinusEqualsToken */:
+                case 59 /* AsteriskEqualsToken */:
+                case 61 /* SlashEqualsToken */:
+                case 62 /* PercentEqualsToken */:
+                case 56 /* EqualsToken */:
+                case 24 /* CommaToken */:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isPrefixUnaryExpressionOperatorToken(token) {
+            switch (token) {
+                case 35 /* PlusToken */:
+                case 36 /* MinusToken */:
+                case 50 /* TildeToken */:
+                case 49 /* ExclamationToken */:
+                case 41 /* PlusPlusToken */:
+                case 42 /* MinusMinusToken */:
+                    return true;
+                default:
+                    return false;
+            }
+        }
+        function isKeyword(token) {
+            return token >= 70 /* FirstKeyword */ && token <= 138 /* LastKeyword */;
+        }
+        function classFromKind(token) {
+            if (isKeyword(token)) {
+                return 3 /* keyword */;
+            }
+            else if (isBinaryExpressionOperatorToken(token) || isPrefixUnaryExpressionOperatorToken(token)) {
+                return 5 /* operator */;
+            }
+            else if (token >= 15 /* FirstPunctuation */ && token <= 68 /* LastPunctuation */) {
+                return 10 /* punctuation */;
+            }
+            switch (token) {
+                case 8 /* NumericLiteral */:
+                    return 4 /* numericLiteral */;
+                case 9 /* StringLiteral */:
+                case 166 /* StringLiteralType */:
+                    return 6 /* stringLiteral */;
+                case 10 /* RegularExpressionLiteral */:
+                    return 7 /* regularExpressionLiteral */;
+                case 7 /* ConflictMarkerTrivia */:
+                case 3 /* MultiLineCommentTrivia */:
+                case 2 /* SingleLineCommentTrivia */:
+                    return 1 /* comment */;
+                case 5 /* WhitespaceTrivia */:
+                case 4 /* NewLineTrivia */:
+                    return 8 /* whiteSpace */;
+                case 69 /* Identifier */:
+                default:
+                    if (ts.isTemplateLiteralKind(token)) {
+                        return 6 /* stringLiteral */;
+                    }
+                    return 2 /* identifier */;
+            }
+        }
+        return {
+            getClassificationsForLine: getClassificationsForLine,
+            getEncodedLexicalClassifications: getEncodedLexicalClassifications
+        };
+    }
+    ts.createClassifier = createClassifier;
+    /**
+      * Get the path of the default library files (lib.d.ts) as distributed with the typescript
+      * node package.
+      * The functionality is not supported if the ts module is consumed outside of a node module.
+      */
+    function getDefaultLibFilePath(options) {
+        // Check __dirname is defined and that we are on a node.js system.
+        if (typeof __dirname !== "undefined") {
+            return __dirname + ts.directorySeparator + ts.getDefaultLibFileName(options);
+        }
+        throw new Error("getDefaultLibFilePath is only supported when consumed as a node module. ");
+    }
+    ts.getDefaultLibFilePath = getDefaultLibFilePath;
+    function initializeServices() {
+        ts.objectAllocator = {
+            getNodeConstructor: function () { return NodeObject; },
+            getSourceFileConstructor: function () { return SourceFileObject; },
+            getSymbolConstructor: function () { return SymbolObject; },
+            getTypeConstructor: function () { return TypeObject; },
+            getSignatureConstructor: function () { return SignatureObject; }
+        };
+    }
+    initializeServices();
+})(ts || (ts = {}));
+// Copyright (c) Microsoft. All rights reserved. Licensed under the Apache License, Version 2.0.
+// See LICENSE.txt in the project root for complete license information.
+/// <reference path='services.ts' />
+/* @internal */
+var ts;
+(function (ts) {
+    var BreakpointResolver;
+    (function (BreakpointResolver) {
+        /**
+         * Get the breakpoint span in given sourceFile
+         */
+        function spanInSourceFileAtLocation(sourceFile, position) {
+            // Cannot set breakpoint in dts file
+            if (sourceFile.isDeclarationFile) {
+                return undefined;
+            }
+            var tokenAtLocation = ts.getTokenAtPosition(sourceFile, position);
+            var lineOfPosition = sourceFile.getLineAndCharacterOfPosition(position).line;
+            if (sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getStart(sourceFile)).line > lineOfPosition) {
+                // Get previous token if the token is returned starts on new line
+                // eg: let x =10; |--- cursor is here
+                //     let y = 10;
+                // token at position will return let keyword on second line as the token but we would like to use
+                // token on same line if trailing trivia (comments or white spaces on same line) part of the last token on that line
+                tokenAtLocation = ts.findPrecedingToken(tokenAtLocation.pos, sourceFile);
+                // It's a blank line
+                if (!tokenAtLocation || sourceFile.getLineAndCharacterOfPosition(tokenAtLocation.getEnd()).line !== lineOfPosition) {
+                    return undefined;
+                }
+            }
+            // Cannot set breakpoint in ambient declarations
+            if (ts.isInAmbientContext(tokenAtLocation)) {
+                return undefined;
+            }
+            // Get the span in the node based on its syntax
+            return spanInNode(tokenAtLocation);
+            function textSpan(startNode, endNode) {
+                var start = startNode.decorators ?
+                    ts.skipTrivia(sourceFile.text, startNode.decorators.end) :
+                    startNode.getStart(sourceFile);
+                return ts.createTextSpanFromBounds(start, (endNode || startNode).getEnd());
+            }
+            function textSpanEndingAtNextToken(startNode, previousTokenToFindNextEndToken) {
+                return textSpan(startNode, ts.findNextToken(previousTokenToFindNextEndToken, previousTokenToFindNextEndToken.parent));
+            }
+            function spanInNodeIfStartsOnSameLine(node, otherwiseOnNode) {
+                if (node && lineOfPosition === sourceFile.getLineAndCharacterOfPosition(node.getStart(sourceFile)).line) {
+                    return spanInNode(node);
+                }
+                return spanInNode(otherwiseOnNode);
+            }
+            function spanInNodeArray(nodeArray) {
+                return ts.createTextSpanFromBounds(ts.skipTrivia(sourceFile.text, nodeArray.pos), nodeArray.end);
+            }
+            function spanInPreviousNode(node) {
+                return spanInNode(ts.findPrecedingToken(node.pos, sourceFile));
+            }
+            function spanInNextNode(node) {
+                return spanInNode(ts.findNextToken(node, node.parent));
+            }
+            function spanInNode(node) {
+                if (node) {
+                    switch (node.kind) {
+                        case 200 /* VariableStatement */:
+                            // Span on first variable declaration
+                            return spanInVariableDeclaration(node.declarationList.declarations[0]);
+                        case 218 /* VariableDeclaration */:
+                        case 145 /* PropertyDeclaration */:
+                        case 144 /* PropertySignature */:
+                            return spanInVariableDeclaration(node);
+                        case 142 /* Parameter */:
+                            return spanInParameterDeclaration(node);
+                        case 220 /* FunctionDeclaration */:
+                        case 147 /* MethodDeclaration */:
+                        case 146 /* MethodSignature */:
+                        case 149 /* GetAccessor */:
+                        case 150 /* SetAccessor */:
+                        case 148 /* Constructor */:
+                        case 179 /* FunctionExpression */:
+                        case 180 /* ArrowFunction */:
+                            return spanInFunctionDeclaration(node);
+                        case 199 /* Block */:
+                            if (ts.isFunctionBlock(node)) {
+                                return spanInFunctionBlock(node);
+                            }
+                        // Fall through
+                        case 226 /* ModuleBlock */:
+                            return spanInBlock(node);
+                        case 252 /* CatchClause */:
+                            return spanInBlock(node.block);
+                        case 202 /* ExpressionStatement */:
+                            // span on the expression
+                            return textSpan(node.expression);
+                        case 211 /* ReturnStatement */:
+                            // span on return keyword and expression if present
+                            return textSpan(node.getChildAt(0), node.expression);
+                        case 205 /* WhileStatement */:
+                            // Span on while(...)
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 204 /* DoStatement */:
+                            // span in statement of the do statement
+                            return spanInNode(node.statement);
+                        case 217 /* DebuggerStatement */:
+                            // span on debugger keyword
+                            return textSpan(node.getChildAt(0));
+                        case 203 /* IfStatement */:
+                            // set on if(..) span
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 214 /* LabeledStatement */:
+                            // span in statement
+                            return spanInNode(node.statement);
+                        case 210 /* BreakStatement */:
+                        case 209 /* ContinueStatement */:
+                            // On break or continue keyword and label if present
+                            return textSpan(node.getChildAt(0), node.label);
+                        case 206 /* ForStatement */:
+                            return spanInForStatement(node);
+                        case 207 /* ForInStatement */:
+                            // span of for (a in ...)
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 208 /* ForOfStatement */:
+                            // span in initializer
+                            return spanInInitializerOfForLike(node);
+                        case 213 /* SwitchStatement */:
+                            // span on switch(...)
+                            return textSpanEndingAtNextToken(node, node.expression);
+                        case 249 /* CaseClause */:
+                        case 250 /* DefaultClause */:
+                            // span in first statement of the clause
+                            return spanInNode(node.statements[0]);
+                        case 216 /* TryStatement */:
+                            // span in try block
+                            return spanInBlock(node.tryBlock);
+                        case 215 /* ThrowStatement */:
+                            // span in throw ...
+                            return textSpan(node, node.expression);
+                        case 235 /* ExportAssignment */:
+                            // span on export = id
+                            return textSpan(node, node.expression);
+                        case 229 /* ImportEqualsDeclaration */:
+                            // import statement without including semicolon
+                            return textSpan(node, node.moduleReference);
+                        case 230 /* ImportDeclaration */:
+                            // import statement without including semicolon
+                            return textSpan(node, node.moduleSpecifier);
+                        case 236 /* ExportDeclaration */:
+                            // import statement without including semicolon
+                            return textSpan(node, node.moduleSpecifier);
+                        case 225 /* ModuleDeclaration */:
+                            // span on complete module if it is instantiated
+                            if (ts.getModuleInstanceState(node) !== 1 /* Instantiated */) {
+                                return undefined;
+                            }
+                        case 221 /* ClassDeclaration */:
+                        case 224 /* EnumDeclaration */:
+                        case 255 /* EnumMember */:
+                        case 169 /* BindingElement */:
+                            // span on complete node
+                            return textSpan(node);
+                        case 212 /* WithStatement */:
+                            // span in statement
+                            return spanInNode(node.statement);
+                        case 143 /* Decorator */:
+                            return spanInNodeArray(node.parent.decorators);
+                        case 167 /* ObjectBindingPattern */:
+                        case 168 /* ArrayBindingPattern */:
+                            return spanInBindingPattern(node);
+                        // No breakpoint in interface, type alias
+                        case 222 /* InterfaceDeclaration */:
+                        case 223 /* TypeAliasDeclaration */:
+                            return undefined;
+                        // Tokens:
+                        case 23 /* SemicolonToken */:
+                        case 1 /* EndOfFileToken */:
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile));
+                        case 24 /* CommaToken */:
+                            return spanInPreviousNode(node);
+                        case 15 /* OpenBraceToken */:
+                            return spanInOpenBraceToken(node);
+                        case 16 /* CloseBraceToken */:
+                            return spanInCloseBraceToken(node);
+                        case 20 /* CloseBracketToken */:
+                            return spanInCloseBracketToken(node);
+                        case 17 /* OpenParenToken */:
+                            return spanInOpenParenToken(node);
+                        case 18 /* CloseParenToken */:
+                            return spanInCloseParenToken(node);
+                        case 54 /* ColonToken */:
+                            return spanInColonToken(node);
+                        case 27 /* GreaterThanToken */:
+                        case 25 /* LessThanToken */:
+                            return spanInGreaterThanOrLessThanToken(node);
+                        // Keywords:
+                        case 104 /* WhileKeyword */:
+                            return spanInWhileKeyword(node);
+                        case 80 /* ElseKeyword */:
+                        case 72 /* CatchKeyword */:
+                        case 85 /* FinallyKeyword */:
+                            return spanInNextNode(node);
+                        case 138 /* OfKeyword */:
+                            return spanInOfKeyword(node);
+                        default:
+                            // Destructuring pattern in destructuring assignment
+                            // [a, b, c] of
+                            // [a, b, c] = expression
+                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node)) {
+                                return spanInArrayLiteralOrObjectLiteralDestructuringPattern(node);
+                            }
+                            // Set breakpoint on identifier element of destructuring pattern
+                            // a or ...c  or d: x from
+                            // [a, b, ...c] or { a, b } or { d: x } from destructuring pattern
+                            if ((node.kind === 69 /* Identifier */ ||
+                                node.kind == 191 /* SpreadElementExpression */ ||
+                                node.kind === 253 /* PropertyAssignment */ ||
+                                node.kind === 254 /* ShorthandPropertyAssignment */) &&
+                                ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
+                                return textSpan(node);
+                            }
+                            if (node.kind === 187 /* BinaryExpression */) {
+                                var binaryExpression = node;
+                                // Set breakpoint in destructuring pattern if its destructuring assignment
+                                // [a, b, c] or {a, b, c} of
+                                // [a, b, c] = expression or
+                                // {a, b, c} = expression
+                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left)) {
+                                    return spanInArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left);
+                                }
+                                if (binaryExpression.operatorToken.kind === 56 /* EqualsToken */ &&
+                                    ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.parent)) {
+                                    // Set breakpoint on assignment expression element of destructuring pattern
+                                    // a = expression of
+                                    // [a = expression, b, c] = someExpression or
+                                    // { a = expression, b, c } = someExpression
+                                    return textSpan(node);
+                                }
+                                if (binaryExpression.operatorToken.kind === 24 /* CommaToken */) {
+                                    return spanInNode(binaryExpression.left);
+                                }
+                            }
+                            if (ts.isExpression(node)) {
+                                switch (node.parent.kind) {
+                                    case 204 /* DoStatement */:
+                                        // Set span as if on while keyword
+                                        return spanInPreviousNode(node);
+                                    case 143 /* Decorator */:
+                                        // Set breakpoint on the decorator emit
+                                        return spanInNode(node.parent);
+                                    case 206 /* ForStatement */:
+                                    case 208 /* ForOfStatement */:
+                                        return textSpan(node);
+                                    case 187 /* BinaryExpression */:
+                                        if (node.parent.operatorToken.kind === 24 /* CommaToken */) {
+                                            // If this is a comma expression, the breakpoint is possible in this expression
+                                            return textSpan(node);
+                                        }
+                                        break;
+                                    case 180 /* ArrowFunction */:
+                                        if (node.parent.body === node) {
+                                            // If this is body of arrow function, it is allowed to have the breakpoint
+                                            return textSpan(node);
+                                        }
+                                        break;
+                                }
+                            }
+                            // If this is name of property assignment, set breakpoint in the initializer
+                            if (node.parent.kind === 253 /* PropertyAssignment */ &&
+                                node.parent.name === node &&
+                                !ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent.parent)) {
+                                return spanInNode(node.parent.initializer);
+                            }
+                            // Breakpoint in type assertion goes to its operand
+                            if (node.parent.kind === 177 /* TypeAssertionExpression */ && node.parent.type === node) {
+                                return spanInNextNode(node.parent.type);
+                            }
+                            // return type of function go to previous token
+                            if (ts.isFunctionLike(node.parent) && node.parent.type === node) {
+                                return spanInPreviousNode(node);
+                            }
+                            // initializer of variable/parameter declaration go to previous node
+                            if ((node.parent.kind === 218 /* VariableDeclaration */ ||
+                                node.parent.kind === 142 /* Parameter */)) {
+                                var paramOrVarDecl = node.parent;
+                                if (paramOrVarDecl.initializer === node ||
+                                    paramOrVarDecl.type === node ||
+                                    ts.isAssignmentOperator(node.kind)) {
+                                    return spanInPreviousNode(node);
+                                }
+                            }
+                            if (node.parent.kind === 187 /* BinaryExpression */) {
+                                var binaryExpression = node.parent;
+                                if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(binaryExpression.left) &&
+                                    (binaryExpression.right === node ||
+                                        binaryExpression.operatorToken === node)) {
+                                    // If initializer of destructuring assignment move to previous token
+                                    return spanInPreviousNode(node);
+                                }
+                            }
+                            // Default go to parent to set the breakpoint
+                            return spanInNode(node.parent);
+                    }
+                }
+                function textSpanFromVariableDeclaration(variableDeclaration) {
+                    var declarations = variableDeclaration.parent.declarations;
+                    if (declarations && declarations[0] === variableDeclaration) {
+                        // First declaration - include let keyword
+                        return textSpan(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent), variableDeclaration);
+                    }
+                    else {
+                        // Span only on this declaration
+                        return textSpan(variableDeclaration);
+                    }
+                }
+                function spanInVariableDeclaration(variableDeclaration) {
+                    // If declaration of for in statement, just set the span in parent
+                    if (variableDeclaration.parent.parent.kind === 207 /* ForInStatement */) {
+                        return spanInNode(variableDeclaration.parent.parent);
+                    }
+                    // If this is a destructuring pattern, set breakpoint in binding pattern
+                    if (ts.isBindingPattern(variableDeclaration.name)) {
+                        return spanInBindingPattern(variableDeclaration.name);
+                    }
+                    // Breakpoint is possible in variableDeclaration only if there is initialization
+                    // or its declaration from 'for of'
+                    if (variableDeclaration.initializer ||
+                        (variableDeclaration.flags & 1 /* Export */) ||
+                        variableDeclaration.parent.parent.kind === 208 /* ForOfStatement */) {
+                        return textSpanFromVariableDeclaration(variableDeclaration);
+                    }
+                    var declarations = variableDeclaration.parent.declarations;
+                    if (declarations && declarations[0] !== variableDeclaration) {
+                        // If we cannot set breakpoint on this declaration, set it on previous one
+                        // Because the variable declaration may be binding pattern and
+                        // we would like to set breakpoint in last binding element if that's the case,
+                        // use preceding token instead
+                        return spanInNode(ts.findPrecedingToken(variableDeclaration.pos, sourceFile, variableDeclaration.parent));
+                    }
+                }
+                function canHaveSpanInParameterDeclaration(parameter) {
+                    // Breakpoint is possible on parameter only if it has initializer, is a rest parameter, or has public or private modifier
+                    return !!parameter.initializer || parameter.dotDotDotToken !== undefined ||
+                        !!(parameter.flags & 4 /* Public */) || !!(parameter.flags & 8 /* Private */);
+                }
+                function spanInParameterDeclaration(parameter) {
+                    if (ts.isBindingPattern(parameter.name)) {
+                        // Set breakpoint in binding pattern
+                        return spanInBindingPattern(parameter.name);
+                    }
+                    else if (canHaveSpanInParameterDeclaration(parameter)) {
+                        return textSpan(parameter);
+                    }
+                    else {
+                        var functionDeclaration = parameter.parent;
+                        var indexOfParameter = ts.indexOf(functionDeclaration.parameters, parameter);
+                        if (indexOfParameter) {
+                            // Not a first parameter, go to previous parameter
+                            return spanInParameterDeclaration(functionDeclaration.parameters[indexOfParameter - 1]);
+                        }
+                        else {
+                            // Set breakpoint in the function declaration body
+                            return spanInNode(functionDeclaration.body);
+                        }
+                    }
+                }
+                function canFunctionHaveSpanInWholeDeclaration(functionDeclaration) {
+                    return !!(functionDeclaration.flags & 1 /* Export */) ||
+                        (functionDeclaration.parent.kind === 221 /* ClassDeclaration */ && functionDeclaration.kind !== 148 /* Constructor */);
+                }
+                function spanInFunctionDeclaration(functionDeclaration) {
+                    // No breakpoints in the function signature
+                    if (!functionDeclaration.body) {
+                        return undefined;
+                    }
+                    if (canFunctionHaveSpanInWholeDeclaration(functionDeclaration)) {
+                        // Set the span on whole function declaration
+                        return textSpan(functionDeclaration);
+                    }
+                    // Set span in function body
+                    return spanInNode(functionDeclaration.body);
+                }
+                function spanInFunctionBlock(block) {
+                    var nodeForSpanInBlock = block.statements.length ? block.statements[0] : block.getLastToken();
+                    if (canFunctionHaveSpanInWholeDeclaration(block.parent)) {
+                        return spanInNodeIfStartsOnSameLine(block.parent, nodeForSpanInBlock);
+                    }
+                    return spanInNode(nodeForSpanInBlock);
+                }
+                function spanInBlock(block) {
+                    switch (block.parent.kind) {
+                        case 225 /* ModuleDeclaration */:
+                            if (ts.getModuleInstanceState(block.parent) !== 1 /* Instantiated */) {
+                                return undefined;
+                            }
+                        // Set on parent if on same line otherwise on first statement
+                        case 205 /* WhileStatement */:
+                        case 203 /* IfStatement */:
+                        case 207 /* ForInStatement */:
+                            return spanInNodeIfStartsOnSameLine(block.parent, block.statements[0]);
+                        // Set span on previous token if it starts on same line otherwise on the first statement of the block
+                        case 206 /* ForStatement */:
+                        case 208 /* ForOfStatement */:
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(block.pos, sourceFile, block.parent), block.statements[0]);
+                    }
+                    // Default action is to set on first statement
+                    return spanInNode(block.statements[0]);
+                }
+                function spanInInitializerOfForLike(forLikeStatement) {
+                    if (forLikeStatement.initializer.kind === 219 /* VariableDeclarationList */) {
+                        // Declaration list - set breakpoint in first declaration
+                        var variableDeclarationList = forLikeStatement.initializer;
+                        if (variableDeclarationList.declarations.length > 0) {
+                            return spanInNode(variableDeclarationList.declarations[0]);
+                        }
+                    }
+                    else {
+                        // Expression - set breakpoint in it
+                        return spanInNode(forLikeStatement.initializer);
+                    }
+                }
+                function spanInForStatement(forStatement) {
+                    if (forStatement.initializer) {
+                        return spanInInitializerOfForLike(forStatement);
+                    }
+                    if (forStatement.condition) {
+                        return textSpan(forStatement.condition);
+                    }
+                    if (forStatement.incrementor) {
+                        return textSpan(forStatement.incrementor);
+                    }
+                }
+                function spanInBindingPattern(bindingPattern) {
+                    // Set breakpoint in first binding element
+                    var firstBindingElement = ts.forEach(bindingPattern.elements, function (element) { return element.kind !== 193 /* OmittedExpression */ ? element : undefined; });
+                    if (firstBindingElement) {
+                        return spanInNode(firstBindingElement);
+                    }
+                    // Empty binding pattern of binding element, set breakpoint on binding element
+                    if (bindingPattern.parent.kind === 169 /* BindingElement */) {
+                        return textSpan(bindingPattern.parent);
+                    }
+                    // Variable declaration is used as the span
+                    return textSpanFromVariableDeclaration(bindingPattern.parent);
+                }
+                function spanInArrayLiteralOrObjectLiteralDestructuringPattern(node) {
+                    ts.Debug.assert(node.kind !== 168 /* ArrayBindingPattern */ && node.kind !== 167 /* ObjectBindingPattern */);
+                    var elements = node.kind === 170 /* ArrayLiteralExpression */ ?
+                        node.elements :
+                        node.properties;
+                    var firstBindingElement = ts.forEach(elements, function (element) { return element.kind !== 193 /* OmittedExpression */ ? element : undefined; });
+                    if (firstBindingElement) {
+                        return spanInNode(firstBindingElement);
+                    }
+                    // Could be ArrayLiteral from destructuring assignment or
+                    // just nested element in another destructuring assignment
+                    // set breakpoint on assignment when parent is destructuring assignment
+                    // Otherwise set breakpoint for this element
+                    return textSpan(node.parent.kind === 187 /* BinaryExpression */ ? node.parent : node);
+                }
+                // Tokens:
+                function spanInOpenBraceToken(node) {
+                    switch (node.parent.kind) {
+                        case 224 /* EnumDeclaration */:
+                            var enumDeclaration = node.parent;
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), enumDeclaration.members.length ? enumDeclaration.members[0] : enumDeclaration.getLastToken(sourceFile));
+                        case 221 /* ClassDeclaration */:
+                            var classDeclaration = node.parent;
+                            return spanInNodeIfStartsOnSameLine(ts.findPrecedingToken(node.pos, sourceFile, node.parent), classDeclaration.members.length ? classDeclaration.members[0] : classDeclaration.getLastToken(sourceFile));
+                        case 227 /* CaseBlock */:
+                            return spanInNodeIfStartsOnSameLine(node.parent.parent, node.parent.clauses[0]);
+                    }
+                    // Default to parent node
+                    return spanInNode(node.parent);
+                }
+                function spanInCloseBraceToken(node) {
+                    switch (node.parent.kind) {
+                        case 226 /* ModuleBlock */:
+                            // If this is not an instantiated module block, no bp span
+                            if (ts.getModuleInstanceState(node.parent.parent) !== 1 /* Instantiated */) {
+                                return undefined;
+                            }
+                        case 224 /* EnumDeclaration */:
+                        case 221 /* ClassDeclaration */:
+                            // Span on close brace token
+                            return textSpan(node);
+                        case 199 /* Block */:
+                            if (ts.isFunctionBlock(node.parent)) {
+                                // Span on close brace token
+                                return textSpan(node);
+                            }
+                        // fall through
+                        case 252 /* CatchClause */:
+                            return spanInNode(ts.lastOrUndefined(node.parent.statements));
+                        case 227 /* CaseBlock */:
+                            // breakpoint in last statement of the last clause
+                            var caseBlock = node.parent;
+                            var lastClause = ts.lastOrUndefined(caseBlock.clauses);
+                            if (lastClause) {
+                                return spanInNode(ts.lastOrUndefined(lastClause.statements));
+                            }
+                            return undefined;
+                        case 167 /* ObjectBindingPattern */:
+                            // Breakpoint in last binding element or binding pattern if it contains no elements
+                            var bindingPattern = node.parent;
+                            return spanInNode(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
+                        // Default to parent node
+                        default:
+                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
+                                // Breakpoint in last binding element or binding pattern if it contains no elements
+                                var objectLiteral = node.parent;
+                                return textSpan(ts.lastOrUndefined(objectLiteral.properties) || objectLiteral);
+                            }
+                            return spanInNode(node.parent);
+                    }
+                }
+                function spanInCloseBracketToken(node) {
+                    switch (node.parent.kind) {
+                        case 168 /* ArrayBindingPattern */:
+                            // Breakpoint in last binding element or binding pattern if it contains no elements
+                            var bindingPattern = node.parent;
+                            return textSpan(ts.lastOrUndefined(bindingPattern.elements) || bindingPattern);
+                        default:
+                            if (ts.isArrayLiteralOrObjectLiteralDestructuringPattern(node.parent)) {
+                                // Breakpoint in last binding element or binding pattern if it contains no elements
+                                var arrayLiteral = node.parent;
+                                return textSpan(ts.lastOrUndefined(arrayLiteral.elements) || arrayLiteral);
+                            }
+                            // Default to parent node
+                            return spanInNode(node.parent);
+                    }
+                }
+                function spanInOpenParenToken(node) {
+                    if (node.parent.kind === 204 /* DoStatement */ ||
+                        node.parent.kind === 174 /* CallExpression */ ||
+                        node.parent.kind === 175 /* NewExpression */) {
+                        return spanInPreviousNode(node);
+                    }
+                    if (node.parent.kind === 178 /* ParenthesizedExpression */) {
+                        return spanInNextNode(node);
+                    }
+                    // Default to parent node
+                    return spanInNode(node.parent);
+                }
+                function spanInCloseParenToken(node) {
+                    // Is this close paren token of parameter list, set span in previous token
+                    switch (node.parent.kind) {
+                        case 179 /* FunctionExpression */:
+                        case 220 /* FunctionDeclaration */:
+                        case 180 /* ArrowFunction */:
+                        case 147 /* MethodDeclaration */:
+                        case 146 /* MethodSignature */:
+                        case 149 /* GetAccessor */:
+                        case 150 /* SetAccessor */:
+                        case 148 /* Constructor */:
+                        case 205 /* WhileStatement */:
+                        case 204 /* DoStatement */:
+                        case 206 /* ForStatement */:
+                        case 208 /* ForOfStatement */:
+                        case 174 /* CallExpression */:
+                        case 175 /* NewExpression */:
+                        case 178 /* ParenthesizedExpression */:
+                            return spanInPreviousNode(node);
+                        // Default to parent node
+                        default:
+                            return spanInNode(node.parent);
+                    }
+                }
+                function spanInColonToken(node) {
+                    // Is this : specifying return annotation of the function declaration
+                    if (ts.isFunctionLike(node.parent) ||
+                        node.parent.kind === 253 /* PropertyAssignment */ ||
+                        node.parent.kind === 142 /* Parameter */) {
+                        return spanInPreviousNode(node);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInGreaterThanOrLessThanToken(node) {
+                    if (node.parent.kind === 177 /* TypeAssertionExpression */) {
+                        return spanInNextNode(node);
+                    }
+                    return spanInNode(node.parent);
+                }
+                function spanInWhileKeyword(node) {
+                    if (node.parent.kind === 204 /* DoStatement */) {
+                        // Set span on while expression
+                        return textSpanEndingAtNextToken(node, node.parent.expression);
+                    }
+                    // Default to parent node
+                    return spanInNode(node.parent);
+                }
+                function spanInOfKeyword(node) {
+                    if (node.parent.kind === 208 /* ForOfStatement */) {
+                        // Set using next token
+                        return spanInNextNode(node);
+                    }
+                    // Default to parent node
+                    return spanInNode(node.parent);
+                }
+            }
+        }
+        BreakpointResolver.spanInSourceFileAtLocation = spanInSourceFileAtLocation;
+    })(BreakpointResolver = ts.BreakpointResolver || (ts.BreakpointResolver = {}));
+})(ts || (ts = {}));
+//
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//   http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+//
+/// <reference path='services.ts' />
+/* @internal */
+var debugObjectHost = this;
+// We need to use 'null' to interface with the managed side.
+/* tslint:disable:no-null-keyword */
+/* tslint:disable:no-in-operator */
+/* @internal */
+var ts;
+(function (ts) {
+    function logInternalError(logger, err) {
+        if (logger) {
+            logger.log("*INTERNAL ERROR* - Exception in typescript services: " + err.message);
+        }
+    }
+    var ScriptSnapshotShimAdapter = (function () {
+        function ScriptSnapshotShimAdapter(scriptSnapshotShim) {
+            this.scriptSnapshotShim = scriptSnapshotShim;
+        }
+        ScriptSnapshotShimAdapter.prototype.getText = function (start, end) {
+            return this.scriptSnapshotShim.getText(start, end);
+        };
+        ScriptSnapshotShimAdapter.prototype.getLength = function () {
+            return this.scriptSnapshotShim.getLength();
+        };
+        ScriptSnapshotShimAdapter.prototype.getChangeRange = function (oldSnapshot) {
+            var oldSnapshotShim = oldSnapshot;
+            var encoded = this.scriptSnapshotShim.getChangeRange(oldSnapshotShim.scriptSnapshotShim);
+            // TODO: should this be '==='?
+            if (encoded == null) {
+                return null;
+            }
+            var decoded = JSON.parse(encoded);
+            return ts.createTextChangeRange(ts.createTextSpan(decoded.span.start, decoded.span.length), decoded.newLength);
+        };
+        ScriptSnapshotShimAdapter.prototype.dispose = function () {
+            // if scriptSnapshotShim is a COM object then property check becomes method call with no arguments
+            // 'in' does not have this effect
+            if ("dispose" in this.scriptSnapshotShim) {
+                this.scriptSnapshotShim.dispose();
+            }
+        };
+        return ScriptSnapshotShimAdapter;
+    }());
+    var LanguageServiceShimHostAdapter = (function () {
+        function LanguageServiceShimHostAdapter(shimHost) {
+            var _this = this;
+            this.shimHost = shimHost;
+            this.loggingEnabled = false;
+            this.tracingEnabled = false;
+            // if shimHost is a COM object then property check will become method call with no arguments.
+            // 'in' does not have this effect.
+            if ("getModuleResolutionsForFile" in this.shimHost) {
+                this.resolveModuleNames = function (moduleNames, containingFile) {
+                    var resolutionsInFile = JSON.parse(_this.shimHost.getModuleResolutionsForFile(containingFile));
+                    return ts.map(moduleNames, function (name) {
+                        var result = ts.lookUp(resolutionsInFile, name);
+                        return result ? { resolvedFileName: result } : undefined;
+                    });
+                };
+            }
+            if ("directoryExists" in this.shimHost) {
+                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
+            }
+            if ("getTypeReferenceDirectiveResolutionsForFile" in this.shimHost) {
+                this.resolveTypeReferenceDirectives = function (typeDirectiveNames, containingFile) {
+                    var typeDirectivesForFile = JSON.parse(_this.shimHost.getTypeReferenceDirectiveResolutionsForFile(containingFile));
+                    return ts.map(typeDirectiveNames, function (name) { return ts.lookUp(typeDirectivesForFile, name); });
+                };
+            }
+        }
+        LanguageServiceShimHostAdapter.prototype.log = function (s) {
+            if (this.loggingEnabled) {
+                this.shimHost.log(s);
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.trace = function (s) {
+            if (this.tracingEnabled) {
+                this.shimHost.trace(s);
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.error = function (s) {
+            this.shimHost.error(s);
+        };
+        LanguageServiceShimHostAdapter.prototype.getProjectVersion = function () {
+            if (!this.shimHost.getProjectVersion) {
+                // shimmed host does not support getProjectVersion
+                return undefined;
+            }
+            return this.shimHost.getProjectVersion();
+        };
+        LanguageServiceShimHostAdapter.prototype.useCaseSensitiveFileNames = function () {
+            return this.shimHost.useCaseSensitiveFileNames ? this.shimHost.useCaseSensitiveFileNames() : false;
+        };
+        LanguageServiceShimHostAdapter.prototype.getCompilationSettings = function () {
+            var settingsJson = this.shimHost.getCompilationSettings();
+            // TODO: should this be '==='?
+            if (settingsJson == null || settingsJson == "") {
+                throw Error("LanguageServiceShimHostAdapter.getCompilationSettings: empty compilationSettings");
+            }
+            return JSON.parse(settingsJson);
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptFileNames = function () {
+            var encoded = this.shimHost.getScriptFileNames();
+            return this.files = JSON.parse(encoded);
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptSnapshot = function (fileName) {
+            var scriptSnapshot = this.shimHost.getScriptSnapshot(fileName);
+            return scriptSnapshot && new ScriptSnapshotShimAdapter(scriptSnapshot);
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptKind = function (fileName) {
+            if ("getScriptKind" in this.shimHost) {
+                return this.shimHost.getScriptKind(fileName);
+            }
+            else {
+                return 0 /* Unknown */;
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.getScriptVersion = function (fileName) {
+            return this.shimHost.getScriptVersion(fileName);
+        };
+        LanguageServiceShimHostAdapter.prototype.getLocalizedDiagnosticMessages = function () {
+            var diagnosticMessagesJson = this.shimHost.getLocalizedDiagnosticMessages();
+            if (diagnosticMessagesJson == null || diagnosticMessagesJson == "") {
+                return null;
+            }
+            try {
+                return JSON.parse(diagnosticMessagesJson);
+            }
+            catch (e) {
+                this.log(e.description || "diagnosticMessages.generated.json has invalid JSON format");
+                return null;
+            }
+        };
+        LanguageServiceShimHostAdapter.prototype.getCancellationToken = function () {
+            var hostCancellationToken = this.shimHost.getCancellationToken();
+            return new ThrottledCancellationToken(hostCancellationToken);
+        };
+        LanguageServiceShimHostAdapter.prototype.getCurrentDirectory = function () {
+            return this.shimHost.getCurrentDirectory();
+        };
+        LanguageServiceShimHostAdapter.prototype.getDirectories = function (path) {
+            return this.shimHost.getDirectories(path);
+        };
+        LanguageServiceShimHostAdapter.prototype.getDefaultLibFileName = function (options) {
+            return this.shimHost.getDefaultLibFileName(JSON.stringify(options));
+        };
+        return LanguageServiceShimHostAdapter;
+    }());
+    ts.LanguageServiceShimHostAdapter = LanguageServiceShimHostAdapter;
+    /** A cancellation that throttles calls to the host */
+    var ThrottledCancellationToken = (function () {
+        function ThrottledCancellationToken(hostCancellationToken) {
+            this.hostCancellationToken = hostCancellationToken;
+            // Store when we last tried to cancel.  Checking cancellation can be expensive (as we have
+            // to marshall over to the host layer).  So we only bother actually checking once enough
+            // time has passed.
+            this.lastCancellationCheckTime = 0;
+        }
+        ThrottledCancellationToken.prototype.isCancellationRequested = function () {
+            var time = Date.now();
+            var duration = Math.abs(time - this.lastCancellationCheckTime);
+            if (duration > 10) {
+                // Check no more than once every 10 ms.
+                this.lastCancellationCheckTime = time;
+                return this.hostCancellationToken.isCancellationRequested();
+            }
+            return false;
+        };
+        return ThrottledCancellationToken;
+    }());
+    var CoreServicesShimHostAdapter = (function () {
+        function CoreServicesShimHostAdapter(shimHost) {
+            var _this = this;
+            this.shimHost = shimHost;
+            if ("directoryExists" in this.shimHost) {
+                this.directoryExists = function (directoryName) { return _this.shimHost.directoryExists(directoryName); };
+            }
+            if ("realpath" in this.shimHost) {
+                this.realpath = function (path) { return _this.shimHost.realpath(path); };
+            }
+        }
+        CoreServicesShimHostAdapter.prototype.readDirectory = function (rootDir, extension, exclude, depth) {
+            // Wrap the API changes for 2.0 release. This try/catch
+            // should be removed once TypeScript 2.0 has shipped.
+            var encoded;
+            try {
+                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude), depth);
+            }
+            catch (e) {
+                encoded = this.shimHost.readDirectory(rootDir, extension, JSON.stringify(exclude));
+            }
+            return JSON.parse(encoded);
+        };
+        CoreServicesShimHostAdapter.prototype.fileExists = function (fileName) {
+            return this.shimHost.fileExists(fileName);
+        };
+        CoreServicesShimHostAdapter.prototype.readFile = function (fileName) {
+            return this.shimHost.readFile(fileName);
+        };
+        return CoreServicesShimHostAdapter;
+    }());
+    ts.CoreServicesShimHostAdapter = CoreServicesShimHostAdapter;
+    function simpleForwardCall(logger, actionDescription, action, logPerformance) {
+        var start;
+        if (logPerformance) {
+            logger.log(actionDescription);
+            start = Date.now();
+        }
+        var result = action();
+        if (logPerformance) {
+            var end = Date.now();
+            logger.log(actionDescription + " completed in " + (end - start) + " msec");
+            if (typeof result === "string") {
+                var str = result;
+                if (str.length > 128) {
+                    str = str.substring(0, 128) + "...";
+                }
+                logger.log("  result.length=" + str.length + ", result='" + JSON.stringify(str) + "'");
+            }
+        }
+        return result;
+    }
+    function forwardJSONCall(logger, actionDescription, action, logPerformance) {
+        try {
+            var result = simpleForwardCall(logger, actionDescription, action, logPerformance);
+            return JSON.stringify({ result: result });
+        }
+        catch (err) {
+            if (err instanceof ts.OperationCanceledException) {
+                return JSON.stringify({ canceled: true });
+            }
+            logInternalError(logger, err);
+            err.description = actionDescription;
+            return JSON.stringify({ error: err });
+        }
+    }
+    var ShimBase = (function () {
+        function ShimBase(factory) {
+            this.factory = factory;
+            factory.registerShim(this);
+        }
+        ShimBase.prototype.dispose = function (dummy) {
+            this.factory.unregisterShim(this);
+        };
+        return ShimBase;
+    }());
+    function realizeDiagnostics(diagnostics, newLine) {
+        return diagnostics.map(function (d) { return realizeDiagnostic(d, newLine); });
+    }
+    ts.realizeDiagnostics = realizeDiagnostics;
+    function realizeDiagnostic(diagnostic, newLine) {
+        return {
+            message: ts.flattenDiagnosticMessageText(diagnostic.messageText, newLine),
+            start: diagnostic.start,
+            length: diagnostic.length,
+            /// TODO: no need for the tolowerCase call
+            category: ts.DiagnosticCategory[diagnostic.category].toLowerCase(),
+            code: diagnostic.code
+        };
+    }
+    var LanguageServiceShimObject = (function (_super) {
+        __extends(LanguageServiceShimObject, _super);
+        function LanguageServiceShimObject(factory, host, languageService) {
+            _super.call(this, factory);
+            this.host = host;
+            this.languageService = languageService;
+            this.logPerformance = false;
+            this.logger = this.host;
+        }
+        LanguageServiceShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
+            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
+        };
+        /// DISPOSE
+        /**
+         * Ensure (almost) deterministic release of internal Javascript resources when
+         * some external native objects holds onto us (e.g. Com/Interop).
+         */
+        LanguageServiceShimObject.prototype.dispose = function (dummy) {
+            this.logger.log("dispose()");
+            this.languageService.dispose();
+            this.languageService = null;
+            // force a GC
+            if (debugObjectHost && debugObjectHost.CollectGarbage) {
+                debugObjectHost.CollectGarbage();
+                this.logger.log("CollectGarbage()");
+            }
+            this.logger = null;
+            _super.prototype.dispose.call(this, dummy);
+        };
+        /// REFRESH
+        /**
+         * Update the list of scripts known to the compiler
+         */
+        LanguageServiceShimObject.prototype.refresh = function (throwOnError) {
+            this.forwardJSONCall("refresh(" + throwOnError + ")", function () { return null; });
+        };
+        LanguageServiceShimObject.prototype.cleanupSemanticCache = function () {
+            var _this = this;
+            this.forwardJSONCall("cleanupSemanticCache()", function () {
+                _this.languageService.cleanupSemanticCache();
+                return null;
+            });
+        };
+        LanguageServiceShimObject.prototype.realizeDiagnostics = function (diagnostics) {
+            var newLine = ts.getNewLineOrDefaultFromHost(this.host);
+            return ts.realizeDiagnostics(diagnostics, newLine);
+        };
+        LanguageServiceShimObject.prototype.getSyntacticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSyntacticClassifications(fileName, ts.createTextSpan(start, length)); });
+        };
+        LanguageServiceShimObject.prototype.getSemanticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", function () { return _this.languageService.getSemanticClassifications(fileName, ts.createTextSpan(start, length)); });
+        };
+        LanguageServiceShimObject.prototype.getEncodedSyntacticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getEncodedSyntacticClassifications('" + fileName + "', " + start + ", " + length + ")", 
+            // directly serialize the spans out to a string.  This is much faster to decode
+            // on the managed side versus a full JSON array.
+            function () { return convertClassifications(_this.languageService.getEncodedSyntacticClassifications(fileName, ts.createTextSpan(start, length))); });
+        };
+        LanguageServiceShimObject.prototype.getEncodedSemanticClassifications = function (fileName, start, length) {
+            var _this = this;
+            return this.forwardJSONCall("getEncodedSemanticClassifications('" + fileName + "', " + start + ", " + length + ")", 
+            // directly serialize the spans out to a string.  This is much faster to decode
+            // on the managed side versus a full JSON array.
+            function () { return convertClassifications(_this.languageService.getEncodedSemanticClassifications(fileName, ts.createTextSpan(start, length))); });
+        };
+        LanguageServiceShimObject.prototype.getSyntacticDiagnostics = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getSyntacticDiagnostics('" + fileName + "')", function () {
+                var diagnostics = _this.languageService.getSyntacticDiagnostics(fileName);
+                return _this.realizeDiagnostics(diagnostics);
+            });
+        };
+        LanguageServiceShimObject.prototype.getSemanticDiagnostics = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getSemanticDiagnostics('" + fileName + "')", function () {
+                var diagnostics = _this.languageService.getSemanticDiagnostics(fileName);
+                return _this.realizeDiagnostics(diagnostics);
+            });
+        };
+        LanguageServiceShimObject.prototype.getCompilerOptionsDiagnostics = function () {
+            var _this = this;
+            return this.forwardJSONCall("getCompilerOptionsDiagnostics()", function () {
+                var diagnostics = _this.languageService.getCompilerOptionsDiagnostics();
+                return _this.realizeDiagnostics(diagnostics);
+            });
+        };
+        /// QUICKINFO
+        /**
+         * Computes a string representation of the type at the requested position
+         * in the active file.
+         */
+        LanguageServiceShimObject.prototype.getQuickInfoAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getQuickInfoAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getQuickInfoAtPosition(fileName, position); });
+        };
+        /// NAMEORDOTTEDNAMESPAN
+        /**
+         * Computes span information of the name or dotted name at the requested position
+         * in the active file.
+         */
+        LanguageServiceShimObject.prototype.getNameOrDottedNameSpan = function (fileName, startPos, endPos) {
+            var _this = this;
+            return this.forwardJSONCall("getNameOrDottedNameSpan('" + fileName + "', " + startPos + ", " + endPos + ")", function () { return _this.languageService.getNameOrDottedNameSpan(fileName, startPos, endPos); });
+        };
+        /**
+         * STATEMENTSPAN
+         * Computes span information of statement at the requested position in the active file.
+         */
+        LanguageServiceShimObject.prototype.getBreakpointStatementAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getBreakpointStatementAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBreakpointStatementAtPosition(fileName, position); });
+        };
+        /// SIGNATUREHELP
+        LanguageServiceShimObject.prototype.getSignatureHelpItems = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getSignatureHelpItems('" + fileName + "', " + position + ")", function () { return _this.languageService.getSignatureHelpItems(fileName, position); });
+        };
+        /// GOTO DEFINITION
+        /**
+         * Computes the definition location and file for the symbol
+         * at the requested position.
+         */
+        LanguageServiceShimObject.prototype.getDefinitionAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDefinitionAtPosition(fileName, position); });
+        };
+        /// GOTO Type
+        /**
+         * Computes the definition location of the type of the symbol
+         * at the requested position.
+         */
+        LanguageServiceShimObject.prototype.getTypeDefinitionAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getTypeDefinitionAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getTypeDefinitionAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getRenameInfo = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getRenameInfo('" + fileName + "', " + position + ")", function () { return _this.languageService.getRenameInfo(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.findRenameLocations = function (fileName, position, findInStrings, findInComments) {
+            var _this = this;
+            return this.forwardJSONCall("findRenameLocations('" + fileName + "', " + position + ", " + findInStrings + ", " + findInComments + ")", function () { return _this.languageService.findRenameLocations(fileName, position, findInStrings, findInComments); });
+        };
+        /// GET BRACE MATCHING
+        LanguageServiceShimObject.prototype.getBraceMatchingAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getBraceMatchingAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getBraceMatchingAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.isValidBraceCompletionAtPostion = function (fileName, position, openingBrace) {
+            var _this = this;
+            return this.forwardJSONCall("isValidBraceCompletionAtPostion('" + fileName + "', " + position + ", " + openingBrace + ")", function () { return _this.languageService.isValidBraceCompletionAtPostion(fileName, position, openingBrace); });
+        };
+        /// GET SMART INDENT
+        LanguageServiceShimObject.prototype.getIndentationAtPosition = function (fileName, position, options /*Services.EditorOptions*/) {
+            var _this = this;
+            return this.forwardJSONCall("getIndentationAtPosition('" + fileName + "', " + position + ")", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getIndentationAtPosition(fileName, position, localOptions);
+            });
+        };
+        /// GET REFERENCES
+        LanguageServiceShimObject.prototype.getReferencesAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getReferencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getReferencesAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.findReferences = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("findReferences('" + fileName + "', " + position + ")", function () { return _this.languageService.findReferences(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getOccurrencesAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getOccurrencesAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getOccurrencesAtPosition(fileName, position); });
+        };
+        LanguageServiceShimObject.prototype.getDocumentHighlights = function (fileName, position, filesToSearch) {
+            var _this = this;
+            return this.forwardJSONCall("getDocumentHighlights('" + fileName + "', " + position + ")", function () {
+                var results = _this.languageService.getDocumentHighlights(fileName, position, JSON.parse(filesToSearch));
+                // workaround for VS document highlighting issue - keep only items from the initial file
+                var normalizedName = ts.normalizeSlashes(fileName).toLowerCase();
+                return ts.filter(results, function (r) { return ts.normalizeSlashes(r.fileName).toLowerCase() === normalizedName; });
+            });
+        };
+        /// COMPLETION LISTS
+        /**
+         * Get a string based representation of the completions
+         * to provide at the given source position and providing a member completion
+         * list if requested.
+         */
+        LanguageServiceShimObject.prototype.getCompletionsAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getCompletionsAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getCompletionsAtPosition(fileName, position); });
+        };
+        /** Get a string based representation of a completion list entry details */
+        LanguageServiceShimObject.prototype.getCompletionEntryDetails = function (fileName, position, entryName) {
+            var _this = this;
+            return this.forwardJSONCall("getCompletionEntryDetails('" + fileName + "', " + position + ", '" + entryName + "')", function () { return _this.languageService.getCompletionEntryDetails(fileName, position, entryName); });
+        };
+        LanguageServiceShimObject.prototype.getFormattingEditsForRange = function (fileName, start, end, options /*Services.FormatCodeOptions*/) {
+            var _this = this;
+            return this.forwardJSONCall("getFormattingEditsForRange('" + fileName + "', " + start + ", " + end + ")", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getFormattingEditsForRange(fileName, start, end, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getFormattingEditsForDocument = function (fileName, options /*Services.FormatCodeOptions*/) {
+            var _this = this;
+            return this.forwardJSONCall("getFormattingEditsForDocument('" + fileName + "')", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getFormattingEditsForDocument(fileName, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getFormattingEditsAfterKeystroke = function (fileName, position, key, options /*Services.FormatCodeOptions*/) {
+            var _this = this;
+            return this.forwardJSONCall("getFormattingEditsAfterKeystroke('" + fileName + "', " + position + ", '" + key + "')", function () {
+                var localOptions = JSON.parse(options);
+                return _this.languageService.getFormattingEditsAfterKeystroke(fileName, position, key, localOptions);
+            });
+        };
+        LanguageServiceShimObject.prototype.getDocCommentTemplateAtPosition = function (fileName, position) {
+            var _this = this;
+            return this.forwardJSONCall("getDocCommentTemplateAtPosition('" + fileName + "', " + position + ")", function () { return _this.languageService.getDocCommentTemplateAtPosition(fileName, position); });
+        };
+        /// NAVIGATE TO
+        /** Return a list of symbols that are interesting to navigate to */
+        LanguageServiceShimObject.prototype.getNavigateToItems = function (searchValue, maxResultCount) {
+            var _this = this;
+            return this.forwardJSONCall("getNavigateToItems('" + searchValue + "', " + maxResultCount + ")", function () { return _this.languageService.getNavigateToItems(searchValue, maxResultCount); });
+        };
+        LanguageServiceShimObject.prototype.getNavigationBarItems = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getNavigationBarItems('" + fileName + "')", function () { return _this.languageService.getNavigationBarItems(fileName); });
+        };
+        LanguageServiceShimObject.prototype.getOutliningSpans = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getOutliningSpans('" + fileName + "')", function () { return _this.languageService.getOutliningSpans(fileName); });
+        };
+        LanguageServiceShimObject.prototype.getTodoComments = function (fileName, descriptors) {
+            var _this = this;
+            return this.forwardJSONCall("getTodoComments('" + fileName + "')", function () { return _this.languageService.getTodoComments(fileName, JSON.parse(descriptors)); });
+        };
+        /// Emit
+        LanguageServiceShimObject.prototype.getEmitOutput = function (fileName) {
+            var _this = this;
+            return this.forwardJSONCall("getEmitOutput('" + fileName + "')", function () { return _this.languageService.getEmitOutput(fileName); });
+        };
+        return LanguageServiceShimObject;
+    }(ShimBase));
+    function convertClassifications(classifications) {
+        return { spans: classifications.spans.join(","), endOfLineState: classifications.endOfLineState };
+    }
+    var ClassifierShimObject = (function (_super) {
+        __extends(ClassifierShimObject, _super);
+        function ClassifierShimObject(factory, logger) {
+            _super.call(this, factory);
+            this.logger = logger;
+            this.logPerformance = false;
+            this.classifier = ts.createClassifier();
+        }
+        ClassifierShimObject.prototype.getEncodedLexicalClassifications = function (text, lexState, syntacticClassifierAbsent) {
+            var _this = this;
+            return forwardJSONCall(this.logger, "getEncodedLexicalClassifications", function () { return convertClassifications(_this.classifier.getEncodedLexicalClassifications(text, lexState, syntacticClassifierAbsent)); }, this.logPerformance);
+        };
+        /// COLORIZATION
+        ClassifierShimObject.prototype.getClassificationsForLine = function (text, lexState, classifyKeywordsInGenerics) {
+            var classification = this.classifier.getClassificationsForLine(text, lexState, classifyKeywordsInGenerics);
+            var result = "";
+            for (var _i = 0, _a = classification.entries; _i < _a.length; _i++) {
+                var item = _a[_i];
+                result += item.length + "\n";
+                result += item.classification + "\n";
+            }
+            result += classification.finalLexState;
+            return result;
+        };
+        return ClassifierShimObject;
+    }(ShimBase));
+    var CoreServicesShimObject = (function (_super) {
+        __extends(CoreServicesShimObject, _super);
+        function CoreServicesShimObject(factory, logger, host) {
+            _super.call(this, factory);
+            this.logger = logger;
+            this.host = host;
+            this.logPerformance = false;
+        }
+        CoreServicesShimObject.prototype.forwardJSONCall = function (actionDescription, action) {
+            return forwardJSONCall(this.logger, actionDescription, action, this.logPerformance);
+        };
+        CoreServicesShimObject.prototype.resolveModuleName = function (fileName, moduleName, compilerOptionsJson) {
+            var _this = this;
+            return this.forwardJSONCall("resolveModuleName('" + fileName + "')", function () {
+                var compilerOptions = JSON.parse(compilerOptionsJson);
+                var result = ts.resolveModuleName(moduleName, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
+                return {
+                    resolvedFileName: result.resolvedModule ? result.resolvedModule.resolvedFileName : undefined,
+                    failedLookupLocations: result.failedLookupLocations
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.resolveTypeReferenceDirective = function (fileName, typeReferenceDirective, compilerOptionsJson) {
+            var _this = this;
+            return this.forwardJSONCall("resolveTypeReferenceDirective(" + fileName + ")", function () {
+                var compilerOptions = JSON.parse(compilerOptionsJson);
+                var result = ts.resolveTypeReferenceDirective(typeReferenceDirective, ts.normalizeSlashes(fileName), compilerOptions, _this.host);
+                return {
+                    resolvedFileName: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.resolvedFileName : undefined,
+                    primary: result.resolvedTypeReferenceDirective ? result.resolvedTypeReferenceDirective.primary : true,
+                    failedLookupLocations: result.failedLookupLocations
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.getPreProcessedFileInfo = function (fileName, sourceTextSnapshot) {
+            var _this = this;
+            return this.forwardJSONCall("getPreProcessedFileInfo('" + fileName + "')", function () {
+                // for now treat files as JavaScript
+                var result = ts.preProcessFile(sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength()), /* readImportFiles */ true, /* detectJavaScriptImports */ true);
+                return {
+                    referencedFiles: _this.convertFileReferences(result.referencedFiles),
+                    importedFiles: _this.convertFileReferences(result.importedFiles),
+                    ambientExternalModules: result.ambientExternalModules,
+                    isLibFile: result.isLibFile,
+                    typeReferenceDirectives: _this.convertFileReferences(result.typeReferenceDirectives)
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.convertFileReferences = function (refs) {
+            if (!refs) {
+                return undefined;
+            }
+            var result = [];
+            for (var _i = 0, refs_2 = refs; _i < refs_2.length; _i++) {
+                var ref = refs_2[_i];
+                result.push({
+                    path: ts.normalizeSlashes(ref.fileName),
+                    position: ref.pos,
+                    length: ref.end - ref.pos
+                });
+            }
+            return result;
+        };
+        CoreServicesShimObject.prototype.getTSConfigFileInfo = function (fileName, sourceTextSnapshot) {
+            var _this = this;
+            return this.forwardJSONCall("getTSConfigFileInfo('" + fileName + "')", function () {
+                var text = sourceTextSnapshot.getText(0, sourceTextSnapshot.getLength());
+                var result = ts.parseConfigFileTextToJson(fileName, text);
+                if (result.error) {
+                    return {
+                        options: {},
+                        typingOptions: {},
+                        files: [],
+                        raw: {},
+                        errors: [realizeDiagnostic(result.error, "\r\n")]
+                    };
+                }
+                var normalizedFileName = ts.normalizeSlashes(fileName);
+                var configFile = ts.parseJsonConfigFileContent(result.config, _this.host, ts.getDirectoryPath(normalizedFileName), /*existingOptions*/ {}, normalizedFileName);
+                return {
+                    options: configFile.options,
+                    typingOptions: configFile.typingOptions,
+                    files: configFile.fileNames,
+                    raw: configFile.raw,
+                    errors: realizeDiagnostics(configFile.errors, "\r\n")
+                };
+            });
+        };
+        CoreServicesShimObject.prototype.getDefaultCompilationSettings = function () {
+            return this.forwardJSONCall("getDefaultCompilationSettings()", function () { return ts.getDefaultCompilerOptions(); });
+        };
+        CoreServicesShimObject.prototype.discoverTypings = function (discoverTypingsJson) {
+            var _this = this;
+            var getCanonicalFileName = ts.createGetCanonicalFileName(/*useCaseSensitivefileNames:*/ false);
+            return this.forwardJSONCall("discoverTypings()", function () {
+                var info = JSON.parse(discoverTypingsJson);
+                return ts.JsTyping.discoverTypings(_this.host, info.fileNames, ts.toPath(info.projectRootPath, info.projectRootPath, getCanonicalFileName), ts.toPath(info.safeListPath, info.safeListPath, getCanonicalFileName), info.packageNameToTypingLocation, info.typingOptions, info.compilerOptions);
+            });
+        };
+        return CoreServicesShimObject;
+    }(ShimBase));
+    var TypeScriptServicesFactory = (function () {
+        function TypeScriptServicesFactory() {
+            this._shims = [];
+        }
+        /*
+         * Returns script API version.
+         */
+        TypeScriptServicesFactory.prototype.getServicesVersion = function () {
+            return ts.servicesVersion;
+        };
+        TypeScriptServicesFactory.prototype.createLanguageServiceShim = function (host) {
+            try {
+                if (this.documentRegistry === undefined) {
+                    this.documentRegistry = ts.createDocumentRegistry(host.useCaseSensitiveFileNames && host.useCaseSensitiveFileNames(), host.getCurrentDirectory());
+                }
+                var hostAdapter = new LanguageServiceShimHostAdapter(host);
+                var languageService = ts.createLanguageService(hostAdapter, this.documentRegistry);
+                return new LanguageServiceShimObject(this, host, languageService);
+            }
+            catch (err) {
+                logInternalError(host, err);
+                throw err;
+            }
+        };
+        TypeScriptServicesFactory.prototype.createClassifierShim = function (logger) {
+            try {
+                return new ClassifierShimObject(this, logger);
+            }
+            catch (err) {
+                logInternalError(logger, err);
+                throw err;
+            }
+        };
+        TypeScriptServicesFactory.prototype.createCoreServicesShim = function (host) {
+            try {
+                var adapter = new CoreServicesShimHostAdapter(host);
+                return new CoreServicesShimObject(this, host, adapter);
+            }
+            catch (err) {
+                logInternalError(host, err);
+                throw err;
+            }
+        };
+        TypeScriptServicesFactory.prototype.close = function () {
+            // Forget all the registered shims
+            this._shims = [];
+            this.documentRegistry = undefined;
+        };
+        TypeScriptServicesFactory.prototype.registerShim = function (shim) {
+            this._shims.push(shim);
+        };
+        TypeScriptServicesFactory.prototype.unregisterShim = function (shim) {
+            for (var i = 0, n = this._shims.length; i < n; i++) {
+                if (this._shims[i] === shim) {
+                    delete this._shims[i];
+                    return;
+                }
+            }
+            throw new Error("Invalid operation");
+        };
+        return TypeScriptServicesFactory;
+    }());
+    ts.TypeScriptServicesFactory = TypeScriptServicesFactory;
+    if (typeof module !== "undefined" && module.exports) {
+        module.exports = ts;
+    }
+})(ts || (ts = {}));
+/* tslint:enable:no-in-operator */
+/* tslint:enable:no-null */
+/// TODO: this is used by VS, clean this up on both sides of the interface
+/* @internal */
+var TypeScript;
+(function (TypeScript) {
+    var Services;
+    (function (Services) {
+        Services.TypeScriptServicesFactory = ts.TypeScriptServicesFactory;
+    })(Services = TypeScript.Services || (TypeScript.Services = {}));
+})(TypeScript || (TypeScript = {}));
+/* tslint:disable:no-unused-variable */
+// 'toolsVersion' gets consumed by the managed side, so it's not unused.
+// TODO: it should be moved into a namespace though.
+/* @internal */
+var toolsVersion = "1.9";
+/* tslint:enable:no-unused-variable */ 

From e41b10bbc743516b991d072540128034b5913c6d Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Fri, 10 Jun 2016 01:42:35 -0700
Subject: [PATCH 247/332] add test and spit commandLineParser changes to
 another PR

---
 src/compiler/commandLineParser.ts             | 16 +-----
 src/compiler/sys.ts                           | 57 +++++--------------
 src/compiler/types.ts                         |  1 -
 src/server/editorServices.ts                  |  8 ---
 src/server/protocol.d.ts                      |  4 +-
 src/server/session.ts                         |  2 -
 .../cases/unittests/tsserverProjectSystem.ts  | 48 +++++++++++++++-
 7 files changed, 66 insertions(+), 70 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index ccde539fafa..7a73949cf7a 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -727,22 +727,10 @@ namespace ts {
                 const supportedExtensions = getSupportedExtensions(options);
                 Debug.assert(indexOf(supportedExtensions, ".ts") < indexOf(supportedExtensions, ".d.ts"), "Changed priority of extensions to pick");
 
-                const potentialFiles: string[] = [];
-                if (host.readDirectoryWithMultipleExtensions) {
-                    addRange(potentialFiles, host.readDirectoryWithMultipleExtensions(basePath, supportedExtensions, exclude));
-                }
-                else {
-                    for (const extension of supportedExtensions) {
-                        addRange(potentialFiles, host.readDirectory(basePath, extension, exclude));
-                    }
-                }
                 // Get files of supported extensions in their order of resolution
                 for (const extension of supportedExtensions) {
-                    for (const fileName of potentialFiles) {
-                        if (!fileExtensionIs(fileName, extension)) {
-                            continue;
-                        }
-
+                    const filesInDirWithExtension = host.readDirectory(basePath, extension, exclude);
+                    for (const fileName of filesInDirWithExtension) {
                         // .ts extension would read the .d.ts extension files too but since .d.ts is lower priority extension,
                         // lets pick them when its turn comes up
                         if (extension === ".ts" && fileExtensionIs(fileName, ".d.ts")) {
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 659c021c6be..db4270ad271 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -27,7 +27,6 @@ namespace ts {
         getCurrentDirectory(): string;
         getDirectories(path: string): string[];
         readDirectory(path: string, extension?: string, exclude?: string[]): string[];
-        readDirectoryWithMultipleExtensions?(path: string, extensions: string[], exclude?: string[]): string[];
         getModifiedTime?(path: string): Date;
         createHash?(data: string): string;
         getMemoryUsage?(): number;
@@ -416,23 +415,25 @@ namespace ts {
                 return filter<string>(_fs.readdirSync(path), p => fileSystemEntryExists(combinePaths(path, p), FileSystemEntryKind.Directory));
             }
 
-            function visitDirectory(path: string, result: string[], extension: string | string[], exclude: string[]) {
-                const files = _fs.readdirSync(path || ".").sort();
-                const directories: string[] = [];
-                for (const current of files) {
+            function readDirectory(path: string, extension?: string, exclude?: string[]): string[] {
+                const result: string[] = [];
+                exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
+                visitDirectory(path);
+                return result;
+                function visitDirectory(path: string) {
+                    const files = _fs.readdirSync(path || ".").sort();
+                    const directories: string[] = [];
+                    for (const current of files) {
                         // This is necessary because on some file system node fails to exclude
                         // "." and "..". See https://github.com/nodejs/node/issues/4002
                         if (current === "." || current === "..") {
                             continue;
                         }
-                    const name = combinePaths(path, current);
-                    if (!contains(exclude, getCanonicalPath(name))) {
-                        // fs.statSync would throw an exception if the file is a symlink
-                        // whose linked file doesn't exist.
-                        try {
+                        const name = combinePaths(path, current);
+                        if (!contains(exclude, getCanonicalPath(name))) {
                             const stat = _fs.statSync(name);
                             if (stat.isFile()) {
-                                if (checkExtension(name)) {
+                                if (!extension || fileExtensionIs(name, extension)) {
                                     result.push(name);
                                 }
                             }
@@ -440,38 +441,11 @@ namespace ts {
                                 directories.push(name);
                             }
                         }
-                        catch (e) { }
+                    }
+                    for (const current of directories) {
+                        visitDirectory(current);
                     }
                 }
-                for (const current of directories) {
-                    visitDirectory(current, result, extension, exclude);
-                }
-
-                function checkExtension(name: string) {
-                    if (!extension) {
-                        return true;
-                    }
-                    if (typeof extension === "string") {
-                        return fileExtensionIs(name, extension);
-                    }
-                    else {
-                        return forEach(extension, ext => fileExtensionIs(name, ext));
-                    }
-                }
-            }
-
-            function readDirectoryWithMultipleExtensions(path: string, extensions: string[], exclude?: string[]): string[] {
-                const result: string[] = [];
-                exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
-                visitDirectory(path, result, extensions, exclude);
-                return result;
-            }
-
-            function readDirectory(path: string, extension?: string, exclude?: string[]): string[] {
-                const result: string[] = [];
-                exclude = map(exclude, s => getCanonicalPath(combinePaths(path, s)));
-                visitDirectory(path, result, extension, exclude);
-                return result;
             }
 
             return {
@@ -548,7 +522,6 @@ namespace ts {
                 },
                 getDirectories,
                 readDirectory,
-                readDirectoryWithMultipleExtensions,
                 getModifiedTime(path) {
                     try {
                         return _fs.statSync(path).mtime;
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index a386b3c1ff2..d43cd9f910d 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1670,7 +1670,6 @@ namespace ts {
 
     export interface ParseConfigHost {
         readDirectory(rootDir: string, extension: string, exclude: string[]): string[];
-        readDirectoryWithMultipleExtensions?(rootDir: string, extensions: string[], exclude: string[]): string[];
     }
 
     export interface WriteFileCallback {
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 5af2989a717..572acc61a18 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -1184,12 +1184,10 @@ namespace ts.server {
          * @param fileContent is a known version of the file content that is more up to date than the one on disk
          */
         openClientFile(fileName: string, fileContent?: string, scriptKind?: ScriptKind): { configFileName?: string, configFileErrors?: Diagnostic[] } {
-            this.log("start openClientFile: " + new Date().getTime());
             const { configFileName, configFileErrors } = this.openOrUpdateConfiguredProjectForFile(fileName);
             const info = this.openFile(fileName, /*openedByClient*/ true, fileContent, scriptKind);
             this.addOpenFile(info);
             this.printProjects();
-            this.log("end openClientFile: " + new Date().getTime());
             return { configFileName, configFileErrors };
         }
 
@@ -1199,7 +1197,6 @@ namespace ts.server {
          * the tsconfig file content and update the project; otherwise we create a new one.
          */
         openOrUpdateConfiguredProjectForFile(fileName: string): { configFileName?: string, configFileErrors?: Diagnostic[] } {
-            this.log("start openOrUpdateConfiguredProjectForFile: " + new Date().getTime());
             const searchPath = ts.normalizePath(getDirectoryPath(fileName));
             this.log("Search path: " + searchPath, "Info");
             const configFileName = this.findConfigFile(searchPath);
@@ -1228,7 +1225,6 @@ namespace ts.server {
             else {
                 this.log("No config files found.");
             }
-            this.log("end openOrUpdateConfiguredProjectForFile: " + new Date().getTime());
             return configFileName ? { configFileName } : {};
         }
 
@@ -1368,11 +1364,8 @@ namespace ts.server {
         }
 
         openConfigFile(configFilename: string, clientFileName?: string): { success: boolean, project?: Project, errors?: Diagnostic[] } {
-            this.log("start openConfigFile: " + new Date().getTime());
             const { succeeded, projectOptions, errors } = this.configFileToProjectOptions(configFilename);
-            this.log("finish reading config file: " + new Date().getTime());
             if (!succeeded) {
-                this.log("finish openConfigFile: " + new Date().getTime());
                 return { success: false, errors };
             }
             else {
@@ -1408,7 +1401,6 @@ namespace ts.server {
                     path => this.directoryWatchedForSourceFilesChanged(project, path),
                     /*recursive*/ true
                 );
-                this.log("finish openConfigFile: " + new Date().getTime());
                 return { success: true, project: project, errors };
             }
         }
diff --git a/src/server/protocol.d.ts b/src/server/protocol.d.ts
index 4ebf1aff5d6..4cdd331f1d9 100644
--- a/src/server/protocol.d.ts
+++ b/src/server/protocol.d.ts
@@ -124,8 +124,8 @@ declare namespace ts.server.protocol {
           */
         fileNames?: string[];
         /**
-         * Indicates if the project has a active language service instance
-         */
+          * Indicates if the project has a active language service instance
+          */
         languageServiceDisabled?: boolean;
     }
 
diff --git a/src/server/session.ts b/src/server/session.ts
index 17fe4b758f2..fa5fd378a0b 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -421,7 +421,6 @@ namespace ts.server {
         }
 
         private getProjectInfo(fileName: string, needFileNameList: boolean): protocol.ProjectInfo {
-            this.logger.info("start getProjectInfo:" + new Date().getTime());
             fileName = ts.normalizePath(fileName);
             const project = this.projectService.getProjectForFile(fileName);
             if (!project) {
@@ -436,7 +435,6 @@ namespace ts.server {
             if (needFileNameList) {
                 projectInfo.fileNames = project.getFileNames();
             }
-            this.logger.info("end getProjectInfo:" + new Date().getTime());
             return projectInfo;
         }
 
diff --git a/tests/cases/unittests/tsserverProjectSystem.ts b/tests/cases/unittests/tsserverProjectSystem.ts
index cf382d09463..d7b808f79b7 100644
--- a/tests/cases/unittests/tsserverProjectSystem.ts
+++ b/tests/cases/unittests/tsserverProjectSystem.ts
@@ -25,6 +25,7 @@ namespace ts {
     interface FileOrFolder {
         path: string;
         content?: string;
+        fileSize?: number;
     }
 
     interface FSEntry {
@@ -34,6 +35,7 @@ namespace ts {
 
     interface File extends FSEntry {
         content: string;
+        fileSize?: number;
     }
 
     interface Folder extends FSEntry {
@@ -157,7 +159,7 @@ namespace ts {
                 const path = this.toPath(fileOrFolder.path);
                 const fullPath = getNormalizedAbsolutePath(fileOrFolder.path, this.currentDirectory);
                 if (typeof fileOrFolder.content === "string") {
-                    const entry = { path, content: fileOrFolder.content, fullPath };
+                    const entry = { path, content: fileOrFolder.content, fullPath, fileSize: fileOrFolder.fileSize };
                     this.fs.set(path, entry);
                     addFolder(getDirectoryPath(fullPath), this.toPath, this.fs).entries.push(entry);
                 }
@@ -172,6 +174,17 @@ namespace ts {
             return this.fs.contains(path) && isFile(this.fs.get(path));
         };
 
+        getFileSize(s: string) {
+            const path = this.toPath(s);
+            if (this.fs.contains(path)) {
+                const entry = this.fs.get(path);
+                if (isFile(entry)) {
+                    return entry.fileSize ? entry.fileSize : entry.content.length;
+                }
+            }
+            return undefined;
+        }
+
         directoryExists(s: string) {
             const path = this.toPath(s);
             return this.fs.contains(path) && isFolder(this.fs.get(path));
@@ -567,5 +580,38 @@ namespace ts {
             checkConfiguredProjectActualFiles(project, [file1.path, classicModuleFile.path]);
             checkNumberOfInferredProjects(projectService, 1);
         });
+
+        it("should disable language service for project with too many non-ts files", () => {
+            const jsFiles: FileOrFolder[] = [];
+            const configFile: FileOrFolder = {
+                path: `/a/b/jsconfig.json`,
+                content: "{}"
+            };
+            jsFiles.push(configFile);
+            for (let i = 0; i < 1000; i++) {
+                jsFiles.push({
+                    path: `/a/b/file${i}.js`,
+                    content: "",
+                    fileSize: 50000
+                });
+            }
+
+            const host = new TestServerHost(/*useCaseSensitiveFileNames*/ false, getExecutingFilePathFromLibFile(libFile), "/", jsFiles);
+            const projectService = new server.ProjectService(host, nullLogger);
+            projectService.openClientFile(jsFiles[1].path);
+            projectService.openClientFile(jsFiles[2].path);
+            checkNumberOfConfiguredProjects(projectService, 1);
+            checkNumberOfInferredProjects(projectService, 0);
+
+            const project = projectService.configuredProjects[0];
+            assert(project.languageServiceDiabled, "the project's language service is expected to be disabled");
+
+            configFile.content = `{
+                "files": ["/a/b/file1.js", "/a/b/file2.js", "/a/b/file3.js"]
+            }`;
+            host.reloadFS(jsFiles);
+            host.triggerFileWatcherCallback(configFile.path);
+            assert(!project.languageServiceDiabled, "after the config file change, the project's language service is expected to be enabled.");
+        });
     });
 }
\ No newline at end of file

From 1e7790df06ab2070899bdc427eb001e0a0e7181a Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Fri, 10 Jun 2016 03:44:44 -0700
Subject: [PATCH 248/332] Fix #8523

---
 src/server/editorServices.ts                  |  1 +
 .../cases/unittests/tsserverProjectSystem.ts  | 27 +++++++++++++++++++
 2 files changed, 28 insertions(+)

diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 628522c7aa6..ea43e2a5853 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -803,6 +803,7 @@ namespace ts.server {
             else {
                 this.findReferencingProjects(info);
                 if (info.defaultProject) {
+                    info.defaultProject.addOpenRef();
                     this.openFilesReferenced.push(info);
                 }
                 else {
diff --git a/tests/cases/unittests/tsserverProjectSystem.ts b/tests/cases/unittests/tsserverProjectSystem.ts
index cf382d09463..bd049632b9d 100644
--- a/tests/cases/unittests/tsserverProjectSystem.ts
+++ b/tests/cases/unittests/tsserverProjectSystem.ts
@@ -567,5 +567,32 @@ namespace ts {
             checkConfiguredProjectActualFiles(project, [file1.path, classicModuleFile.path]);
             checkNumberOfInferredProjects(projectService, 1);
         });
+
+        it("should keep the configured project when the opened file is referenced by the project but not its root", () => {
+            const file1: FileOrFolder = {
+                path: "/a/b/main.ts",
+                content: "import { objA } from './obj-a';"
+            };
+            const file2: FileOrFolder = {
+                path: "/a/b/obj-a.ts",
+                content: `export const objA = Object.assign({foo: "bar"}, {bar: "baz"});`
+            };
+            const configFile: FileOrFolder = {
+                path: "/a/b/tsconfig.json",
+                content: `{
+                    "compilerOptions": {
+                        "target": "es6"
+                    }, 
+                    "files": [ "main.ts" ]
+                }`
+            };
+            const host = new TestServerHost(/*useCaseSensitiveFileNames*/ false, getExecutingFilePathFromLibFile(libFile), "/", [file1, file2, configFile]);
+            const projectService = new server.ProjectService(host, nullLogger);
+            projectService.openClientFile(file1.path);
+            projectService.closeClientFile(file1.path);
+            projectService.openClientFile(file2.path);
+            checkNumberOfConfiguredProjects(projectService, 1);
+            checkNumberOfInferredProjects(projectService, 0);
+        });
     });
 }
\ No newline at end of file

From 077dfff93bc9419d25e3b0b06a43071991c8e2de Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Fri, 10 Jun 2016 08:03:41 -0700
Subject: [PATCH 249/332] Add tests

---
 .../fourslash/ambientShorthandFindAllRefs.ts  | 21 ++++++++++
 .../ambientShorthandGotoDefinition.ts         | 39 +++++++++++++++++++
 2 files changed, 60 insertions(+)
 create mode 100644 tests/cases/fourslash/ambientShorthandFindAllRefs.ts
 create mode 100644 tests/cases/fourslash/ambientShorthandGotoDefinition.ts

diff --git a/tests/cases/fourslash/ambientShorthandFindAllRefs.ts b/tests/cases/fourslash/ambientShorthandFindAllRefs.ts
new file mode 100644
index 00000000000..16fddd1869d
--- /dev/null
+++ b/tests/cases/fourslash/ambientShorthandFindAllRefs.ts
@@ -0,0 +1,21 @@
+/// <reference path='fourslash.ts' />
+
+// @Filename: declarations.d.ts
+////declare module "jquery";
+
+// @Filename: user.ts
+////import {[|x|]} from "jquery";
+
+// @Filename: user2.ts
+////import {[|x|]} from "jquery";
+
+let ranges = test.ranges();
+for (let range of ranges) {
+    goTo.file(range.fileName);
+    goTo.position(range.start);
+
+    verify.referencesCountIs(ranges.length);
+    for (let expectedRange of ranges) {
+        verify.referencesAtPositionContains(expectedRange);
+    }
+}
diff --git a/tests/cases/fourslash/ambientShorthandGotoDefinition.ts b/tests/cases/fourslash/ambientShorthandGotoDefinition.ts
new file mode 100644
index 00000000000..970b87f8ec2
--- /dev/null
+++ b/tests/cases/fourslash/ambientShorthandGotoDefinition.ts
@@ -0,0 +1,39 @@
+/// <reference path='fourslash.ts' />
+
+// @Filename: declarations.d.ts
+/////*module*/declare module "jquery"
+
+// @Filename: user.ts
+///////<reference path="declarations.d.ts"/>
+////import /*importFoo*/foo, {bar} from "jquery";
+////import /*importBaz*/* as /*idBaz*/baz from "jquery";
+/////*importBang*/import /*idBang*/bang = require("jquery");
+////foo/*useFoo*/(bar/*useBar*/, baz/*useBaz*/, bang/*useBang*/);
+
+goTo.marker("useFoo");
+verify.quickInfoIs("import foo");
+goTo.definition();
+verify.caretAtMarker("importFoo");
+goTo.definition();
+verify.caretAtMarker("module");
+
+goTo.marker("useBar");
+verify.quickInfoIs("import bar");
+goTo.definition();
+verify.caretAtMarker("module");
+
+goTo.marker("useBaz");
+verify.quickInfoIs("import baz");
+goTo.definition();
+verify.caretAtMarker("importBaz");
+goTo.marker("idBaz");
+goTo.definition();
+verify.caretAtMarker("module");
+
+goTo.marker("useBang");
+verify.quickInfoIs("import bang = require(\"jquery\")");
+goTo.definition();
+verify.caretAtMarker("importBang");
+goTo.marker("idBang");
+goTo.definition();
+verify.caretAtMarker("module");

From 85ac67f4ee207b4af01e708f4a114d23289e1147 Mon Sep 17 00:00:00 2001
From: tinza123 <li.zhengbo@outlook.com>
Date: Fri, 10 Jun 2016 11:07:01 -0700
Subject: [PATCH 250/332] check the declaration and use order if both are not
 in module file

---
 src/compiler/checker.ts                               |  3 ++-
 src/services/services.ts                              |  1 +
 .../constDeclarations-useBeforeDefinition2.errors.txt | 11 +++++++++++
 .../jsFileCompilationLetDeclarationOrder2.errors.txt  |  5 ++++-
 .../letDeclarations-useBeforeDefinition2.errors.txt   | 11 +++++++++++
 5 files changed, 29 insertions(+), 2 deletions(-)
 create mode 100644 tests/baselines/reference/constDeclarations-useBeforeDefinition2.errors.txt
 create mode 100644 tests/baselines/reference/letDeclarations-useBeforeDefinition2.errors.txt

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 044f42414b7..26c58ebe752 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -562,7 +562,8 @@ namespace ts {
             const declarationFile = getSourceFileOfNode(declaration);
             const useFile = getSourceFileOfNode(usage);
             if (declarationFile !== useFile) {
-                if (modulekind || (!compilerOptions.outFile && !compilerOptions.out)) {
+                if ((modulekind && (declarationFile.externalModuleIndicator || useFile.externalModuleIndicator)) ||
+                    (!compilerOptions.outFile && !compilerOptions.out)) {
                     // nodes are in different files and order cannot be determines
                     return true;
                 }
diff --git a/src/services/services.ts b/src/services/services.ts
index cae2af356a0..e87a9f0d475 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1,4 +1,5 @@
 /// <reference path="..\compiler\program.ts"/>
+/// <reference path="..\compiler\commandLineParser.ts"/>
 
 /// <reference path='breakpoints.ts' />
 /// <reference path='outliningElementsCollector.ts' />
diff --git a/tests/baselines/reference/constDeclarations-useBeforeDefinition2.errors.txt b/tests/baselines/reference/constDeclarations-useBeforeDefinition2.errors.txt
new file mode 100644
index 00000000000..a4d28f51878
--- /dev/null
+++ b/tests/baselines/reference/constDeclarations-useBeforeDefinition2.errors.txt
@@ -0,0 +1,11 @@
+tests/cases/compiler/file1.ts(2,1): error TS2448: Block-scoped variable 'c' used before its declaration.
+
+
+==== tests/cases/compiler/file1.ts (1 errors) ====
+    
+    c;
+    ~
+!!! error TS2448: Block-scoped variable 'c' used before its declaration.
+    
+==== tests/cases/compiler/file2.ts (0 errors) ====
+    const c = 0;
\ No newline at end of file
diff --git a/tests/baselines/reference/jsFileCompilationLetDeclarationOrder2.errors.txt b/tests/baselines/reference/jsFileCompilationLetDeclarationOrder2.errors.txt
index 21390cc2955..b88c73e0439 100644
--- a/tests/baselines/reference/jsFileCompilationLetDeclarationOrder2.errors.txt
+++ b/tests/baselines/reference/jsFileCompilationLetDeclarationOrder2.errors.txt
@@ -1,10 +1,13 @@
 error TS5053: Option 'allowJs' cannot be specified with option 'declaration'.
+tests/cases/compiler/a.ts(2,1): error TS2448: Block-scoped variable 'a' used before its declaration.
 
 
 !!! error TS5053: Option 'allowJs' cannot be specified with option 'declaration'.
-==== tests/cases/compiler/a.ts (0 errors) ====
+==== tests/cases/compiler/a.ts (1 errors) ====
     let b = 30;
     a = 10;
+    ~
+!!! error TS2448: Block-scoped variable 'a' used before its declaration.
 ==== tests/cases/compiler/b.js (0 errors) ====
     let a = 10;
     b = 30;
diff --git a/tests/baselines/reference/letDeclarations-useBeforeDefinition2.errors.txt b/tests/baselines/reference/letDeclarations-useBeforeDefinition2.errors.txt
new file mode 100644
index 00000000000..5b8633312d9
--- /dev/null
+++ b/tests/baselines/reference/letDeclarations-useBeforeDefinition2.errors.txt
@@ -0,0 +1,11 @@
+tests/cases/compiler/file1.ts(2,1): error TS2448: Block-scoped variable 'l' used before its declaration.
+
+
+==== tests/cases/compiler/file1.ts (1 errors) ====
+    
+    l;
+    ~
+!!! error TS2448: Block-scoped variable 'l' used before its declaration.
+    
+==== tests/cases/compiler/file2.ts (0 errors) ====
+    const l = 0;
\ No newline at end of file

From 5ae0602a633339d662fb63fef9c87afad5071757 Mon Sep 17 00:00:00 2001
From: Vladimir Matveev <vladima@microsoft.com>
Date: Fri, 10 Jun 2016 11:20:59 -0700
Subject: [PATCH 251/332] fix baselines

---
 .../reference/es6modulekindWithES5Target10.errors.txt     | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/tests/baselines/reference/es6modulekindWithES5Target10.errors.txt b/tests/baselines/reference/es6modulekindWithES5Target10.errors.txt
index efa4cd87e43..fd01dafc11f 100644
--- a/tests/baselines/reference/es6modulekindWithES5Target10.errors.txt
+++ b/tests/baselines/reference/es6modulekindWithES5Target10.errors.txt
@@ -1,13 +1,13 @@
-tests/cases/compiler/es6modulekindWithES5Target10.ts(2,1): error TS1202: Import assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
+tests/cases/compiler/es6modulekindWithES5Target10.ts(2,1): error TS1202: Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
 tests/cases/compiler/es6modulekindWithES5Target10.ts(2,20): error TS2307: Cannot find module 'mod'.
-tests/cases/compiler/es6modulekindWithES5Target10.ts(7,1): error TS1203: Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead.
+tests/cases/compiler/es6modulekindWithES5Target10.ts(7,1): error TS1203: Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead.
 
 
 ==== tests/cases/compiler/es6modulekindWithES5Target10.ts (3 errors) ====
     
     import i = require("mod"); // Error;
     ~~~~~~~~~~~~~~~~~~~~~~~~~~
-!!! error TS1202: Import assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
+!!! error TS1202: Import assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.
                        ~~~~~
 !!! error TS2307: Cannot find module 'mod'.
     
@@ -16,4 +16,4 @@ tests/cases/compiler/es6modulekindWithES5Target10.ts(7,1): error TS1203: Export
     }
     export = N; // Error
     ~~~~~~~~~~~
-!!! error TS1203: Export assignment cannot be used when targeting ECMAScript 6 modules. Consider using 'export default' or another module format instead.
\ No newline at end of file
+!!! error TS1203: Export assignment cannot be used when targeting ECMAScript 2015 modules. Consider using 'export default' or another module format instead.
\ No newline at end of file

From 642583771d5f3a3175b5bfd93b9b79ce70dc0938 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Fri, 10 Jun 2016 14:10:30 -0700
Subject: [PATCH 252/332] Salsa: get members of variables whose initialisers
 are functions

---
 src/compiler/binder.ts    |  2 +-
 src/compiler/checker.ts   |  8 ++++++--
 src/compiler/utilities.ts | 12 ++++++++++++
 3 files changed, 19 insertions(+), 3 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index db956cca647..bfe7ee31eb2 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -1945,7 +1945,7 @@ namespace ts {
             classPrototype.parent = leftSideOfAssignment;
 
             const funcSymbol = container.locals[constructorFunction.text];
-            if (!funcSymbol || !(funcSymbol.flags & SymbolFlags.Function)) {
+            if (!funcSymbol || !(funcSymbol.flags & SymbolFlags.Function || isDeclarationOfFunctionExpression(funcSymbol))) {
                 return;
             }
 
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 044f42414b7..e3a29cce258 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -11481,8 +11481,12 @@ namespace ts {
                     // When resolved signature is a call signature (and not a construct signature) the result type is any, unless
                     // the declaring function had members created through 'x.prototype.y = expr' or 'this.y = expr' psuedodeclarations
                     // in a JS file
-                    const funcSymbol = checkExpression(node.expression).symbol;
-                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & SymbolFlags.Function)) {
+                    // Note:JS inferred classes might come from a variable declaration instead of a function declaration.
+                    // In this case, using getResolvedSymbol directly is required to avoid losing the members from the declaration.
+                    const funcSymbol = node.expression.kind === SyntaxKind.Identifier ?
+                        getResolvedSymbol(node.expression as Identifier) :
+                        checkExpression(node.expression).symbol;
+                    if (funcSymbol && funcSymbol.members && (funcSymbol.flags & SymbolFlags.Function || isDeclarationOfFunctionExpression(funcSymbol))) {
                         return getInferredClassType(funcSymbol);
                     }
                     else if (compilerOptions.noImplicitAny) {
diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index c54775ad2af..04ea50f4e0c 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -1257,6 +1257,18 @@ namespace ts {
         return charCode === CharacterCodes.singleQuote || charCode === CharacterCodes.doubleQuote;
     }
 
+    /**
+     * Returns true if the node is a variable declaration whose initializer is a function expression.
+     * This function does not test if the node is in a JavaScript file or not.
+     */
+    export function isDeclarationOfFunctionExpression(s: Symbol) {
+        if (s.valueDeclaration && s.valueDeclaration.kind === SyntaxKind.VariableDeclaration) {
+            const declaration = s.valueDeclaration as VariableDeclaration;
+            return declaration.initializer && declaration.initializer.kind === SyntaxKind.FunctionExpression;
+        }
+        return false;
+    }
+
     /// Given a BinaryExpression, returns SpecialPropertyAssignmentKind for the various kinds of property
     /// assignments we treat as special in the binder
     export function getSpecialPropertyAssignmentKind(expression: Node): SpecialPropertyAssignmentKind {

From 4a9b1209aeffb33ddbc6c7358e2a0e901cb8eee9 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Fri, 10 Jun 2016 14:11:31 -0700
Subject: [PATCH 253/332] Test adding members to JS variables whose
 initialisers are functions

---
 ...salsaMethodsOnAssignedFunctionExpressions.ts | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 tests/cases/fourslash/salsaMethodsOnAssignedFunctionExpressions.ts

diff --git a/tests/cases/fourslash/salsaMethodsOnAssignedFunctionExpressions.ts b/tests/cases/fourslash/salsaMethodsOnAssignedFunctionExpressions.ts
new file mode 100644
index 00000000000..a73207c01d2
--- /dev/null
+++ b/tests/cases/fourslash/salsaMethodsOnAssignedFunctionExpressions.ts
@@ -0,0 +1,17 @@
+/// <reference path="fourslash.ts" />
+// @allowJs: true
+// @Filename: something.js
+////var C = function () { }
+/////**
+//// * The prototype method.
+//// * @param {string} a Parameter definition.
+//// */
+////function f(a) {}
+////C.prototype.m = f;
+////
+////var x = new C();
+////x/*1*/./*2*/m();
+goTo.marker('1');
+verify.quickInfoIs('var x: {\n    m: (a: string) => void;\n}');
+goTo.marker('2');
+verify.completionListContains('m', '(property) C.m: (a: string) => void', 'The prototype method.');

From b027b4f4239f950e9e4420a217f1e46f4c388647 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Fri, 10 Jun 2016 14:13:56 -0700
Subject: [PATCH 254/332] Recommend runtests-parallel in CONTRIBUTING

---
 CONTRIBUTING.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 7a99bf318d2..1c242022979 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -91,10 +91,10 @@ These two files represent the DOM typings and are auto-generated. To make any mo
 
 ## Running the Tests
 
-To run all tests, invoke the `runtests` target using jake:
+To run all tests, invoke the `runtests-parallel` target using jake:
 
 ```Shell
-jake runtests
+jake runtests-parallel
 ```
 
 This run will all tests; to run only a specific subset of tests, use:

From a3a1c49739e413e03c05b498e06db3c9008989ee Mon Sep 17 00:00:00 2001
From: Wesley Wigham <t-weswig@microsoft.com>
Date: Fri, 10 Jun 2016 14:14:32 -0700
Subject: [PATCH 255/332] Allow empty lists on command line

---
 src/compiler/commandLineParser.ts           | 22 +++++++---
 tests/cases/unittests/commandLineParsing.ts | 47 +++++++++++++++++++--
 2 files changed, 59 insertions(+), 10 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 361b38d402b..5188c1f8483 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -488,13 +488,20 @@ namespace ts {
     }
 
     /* @internal */
-    export function parseListTypeOption(opt: CommandLineOptionOfListType, value: string, errors: Diagnostic[]): (string | number)[] {
-        const values = trimString((value || "")).split(",");
+    export function parseListTypeOption(opt: CommandLineOptionOfListType, value = "", errors: Diagnostic[]): (string | number)[] | undefined {
+        value = trimString(value);
+        if (startsWith(value, "-")) {
+            return undefined;
+        }
+        if (value === "" || value === ",") {
+            return [];
+        }
+        const values = value.split(",");
         switch (opt.element.type) {
             case "number":
-                return ts.map(values, parseInt);
+                return map(values, parseInt);
             case "string":
-                return ts.map(values, v => v || "");
+                return map(values, v => v || "");
             default:
                 return filter(map(values, v => parseCustomTypeOption(<CommandLineOptionOfCustomType>opt.element, v, errors)), v => !!v);
         }
@@ -555,8 +562,11 @@ namespace ts {
                                     i++;
                                     break;
                                 case "list":
-                                    options[opt.name] = parseListTypeOption(<CommandLineOptionOfListType>opt, args[i], errors);
-                                    i++;
+                                    const result = parseListTypeOption(<CommandLineOptionOfListType>opt, args[i], errors);
+                                    options[opt.name] = result || [];
+                                    if (result) {
+                                        i++;
+                                    }
                                     break;
                                 // If not a primitive, the possible types are specified in what is effectively a map of options.
                                 default:
diff --git a/tests/cases/unittests/commandLineParsing.ts b/tests/cases/unittests/commandLineParsing.ts
index 8212ff03da4..5f4d9ac0d07 100644
--- a/tests/cases/unittests/commandLineParsing.ts
+++ b/tests/cases/unittests/commandLineParsing.ts
@@ -216,10 +216,24 @@ namespace ts {
                         file: undefined,
                         start: undefined,
                         length: undefined,
-                    }, {
-                        messageText: "Argument for '--lib' option must be:  'es5', 'es6', 'es2015', 'es7', 'es2016', 'es2017', 'dom', 'webworker', 'scripthost', 'es2015.core', 'es2015.collection', 'es2015.generator', 'es2015.iterable', 'es2015.promise', 'es2015.proxy', 'es2015.reflect', 'es2015.symbol', 'es2015.symbol.wellknown', 'es2016.array.include', 'es2017.object', 'es2017.sharedmemory'",
-                        category: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.category,
-                        code: ts.Diagnostics.Argument_for_0_option_must_be_Colon_1.code,
+                    }],
+                    fileNames: ["0.ts"],
+                    options: {
+                        lib: []
+                    }
+                });
+        });
+
+        
+        it("Parse empty string of --lib ", () => {
+            // 0.ts --lib
+            // This test is an error because the empty string is falsey
+            assertParseResult(["0.ts", "--lib", ""],
+                {
+                    errors: [{
+                        messageText: "Compiler option 'lib' expects an argument.",
+                        category: ts.Diagnostics.Compiler_option_0_expects_an_argument.category,
+                        code: ts.Diagnostics.Compiler_option_0_expects_an_argument.code,
 
                         file: undefined,
                         start: undefined,
@@ -232,6 +246,31 @@ namespace ts {
                 });
         });
 
+        it("Parse single comma of --lib ", () => {
+            // 0.ts --lib
+            assertParseResult(["0.ts", "--lib", ","],
+                {
+                    errors: [],
+                    fileNames: ["0.ts"],
+                    options: {
+                        lib: []
+                    }
+                });
+        });
+
+        it("Parse immediately following command line argument of --lib ", () => {
+            // 0.ts --lib
+            assertParseResult(["0.ts", "--lib", "--sourcemap"],
+                {
+                    errors: [],
+                    fileNames: ["0.ts"],
+                    options: {
+                        lib: [],
+                        sourceMap: true
+                    }
+                });
+        });
+
         it("Parse --lib option with extra comma ", () => {
             // --lib es5, es7 0.ts
             assertParseResult(["--lib", "es5,", "es7", "0.ts"],

From d20459607b96b17dacfd018eb6f8e29a97805dfc Mon Sep 17 00:00:00 2001
From: Wesley Wigham <t-weswig@microsoft.com>
Date: Fri, 10 Jun 2016 14:35:13 -0700
Subject: [PATCH 256/332] Remove single-comma empty array form

---
 src/compiler/commandLineParser.ts           |  2 +-
 tests/cases/unittests/commandLineParsing.ts | 12 ------------
 2 files changed, 1 insertion(+), 13 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 5188c1f8483..1434cbbadf0 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -493,7 +493,7 @@ namespace ts {
         if (startsWith(value, "-")) {
             return undefined;
         }
-        if (value === "" || value === ",") {
+        if (value === "") {
             return [];
         }
         const values = value.split(",");
diff --git a/tests/cases/unittests/commandLineParsing.ts b/tests/cases/unittests/commandLineParsing.ts
index 5f4d9ac0d07..49b22b903ad 100644
--- a/tests/cases/unittests/commandLineParsing.ts
+++ b/tests/cases/unittests/commandLineParsing.ts
@@ -246,18 +246,6 @@ namespace ts {
                 });
         });
 
-        it("Parse single comma of --lib ", () => {
-            // 0.ts --lib
-            assertParseResult(["0.ts", "--lib", ","],
-                {
-                    errors: [],
-                    fileNames: ["0.ts"],
-                    options: {
-                        lib: []
-                    }
-                });
-        });
-
         it("Parse immediately following command line argument of --lib ", () => {
             // 0.ts --lib
             assertParseResult(["0.ts", "--lib", "--sourcemap"],

From 8d83cd167fd3327317145b8be560a7ea0358cb2d Mon Sep 17 00:00:00 2001
From: Wesley Wigham <wwigham@gmail.com>
Date: Fri, 10 Jun 2016 15:26:14 -0700
Subject: [PATCH 257/332] Remove trailing whitespace

---
 tests/cases/unittests/commandLineParsing.ts | 1 -
 1 file changed, 1 deletion(-)

diff --git a/tests/cases/unittests/commandLineParsing.ts b/tests/cases/unittests/commandLineParsing.ts
index 49b22b903ad..095f912ac1c 100644
--- a/tests/cases/unittests/commandLineParsing.ts
+++ b/tests/cases/unittests/commandLineParsing.ts
@@ -224,7 +224,6 @@ namespace ts {
                 });
         });
 
-        
         it("Parse empty string of --lib ", () => {
             // 0.ts --lib
             // This test is an error because the empty string is falsey

From 9827b638b4d1a8f3b36fd3e64a46563927c0b326 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Fri, 10 Jun 2016 15:44:11 -0700
Subject: [PATCH 258/332] Implicit type inclusion changes

---
 src/compiler/commandLineParser.ts             |  8 +-
 src/compiler/diagnosticMessages.json          |  4 +
 src/compiler/program.ts                       | 96 +++++++++----------
 src/compiler/types.ts                         |  7 +-
 src/harness/fourslash.ts                      |  4 +-
 src/harness/harness.ts                        | 59 ++++++++----
 src/harness/harnessLanguageService.ts         | 21 ++--
 src/harness/projectsRunner.ts                 |  3 +-
 src/server/editorServices.ts                  |  4 +
 src/services/services.ts                      | 10 +-
 tests/baselines/reference/commonSourceDir5.js |  1 +
 .../reference/commonSourceDir5.symbols        |  9 +-
 .../reference/commonSourceDir5.types          |  1 +
 .../reference/library-reference-1.symbols     |  4 +-
 .../reference/library-reference-1.trace.json  | 15 ++-
 .../reference/library-reference-1.types       |  4 +-
 .../reference/library-reference-10.symbols    |  4 +-
 .../reference/library-reference-10.trace.json | 18 ++--
 .../reference/library-reference-10.types      |  4 +-
 .../reference/library-reference-11.trace.json | 14 +--
 .../reference/library-reference-12.trace.json | 14 +--
 .../reference/library-reference-13.trace.json |  4 +-
 .../reference/library-reference-14.trace.json |  4 +-
 .../reference/library-reference-15.errors.txt | 14 +--
 .../reference/library-reference-15.js         | 11 ++-
 .../reference/library-reference-15.trace.json | 27 +-----
 .../reference/library-reference-2.trace.json  | 10 +-
 .../reference/library-reference-3.trace.json  | 15 +--
 .../reference/library-reference-4.trace.json  | 48 +++-------
 .../reference/library-reference-5.trace.json  | 78 ++++++++-------
 .../reference/library-reference-6.symbols     | 16 ----
 .../reference/library-reference-6.trace.json  | 31 +++++-
 .../reference/library-reference-6.types       | 16 ----
 .../reference/library-reference-7.trace.json  | 14 +--
 .../reference/library-reference-8.symbols     |  6 +-
 .../reference/library-reference-8.trace.json  | 50 ++++++----
 .../reference/library-reference-8.types       |  6 +-
 .../reference/library-reference-9.js          | 16 ----
 .../reference/library-reference-9.symbols     | 16 ----
 .../reference/library-reference-9.trace.json  |  7 --
 .../reference/library-reference-9.types       | 16 ----
 .../moduleResolutionWithSymlinks.errors.txt   | 21 ++++
 .../moduleResolutionWithSymlinks.symbols      | 36 -------
 .../moduleResolutionWithSymlinks.trace.json   | 42 +++++++-
 .../moduleResolutionWithSymlinks.types        | 38 --------
 ...pingBasedModuleResolution3_node.trace.json |  3 +
 ...pingBasedModuleResolution4_node.trace.json |  3 +
 ...pingBasedModuleResolution5_node.trace.json |  4 +
 ...pingBasedModuleResolution6_node.trace.json |  2 +
 ...pingBasedModuleResolution7_node.trace.json |  5 +
 .../typeReferenceDirectives1.trace.json       |  9 +-
 .../typeReferenceDirectives10.trace.json      | 12 ++-
 .../typeReferenceDirectives11.trace.json      |  5 +-
 .../typeReferenceDirectives12.trace.json      | 14 ++-
 .../typeReferenceDirectives13.trace.json      | 12 ++-
 .../typeReferenceDirectives2.trace.json       |  4 +-
 .../typeReferenceDirectives3.trace.json       |  9 +-
 .../typeReferenceDirectives4.trace.json       |  9 +-
 .../typeReferenceDirectives5.trace.json       | 12 ++-
 .../typeReferenceDirectives6.trace.json       |  9 +-
 .../typeReferenceDirectives7.trace.json       |  9 +-
 .../typeReferenceDirectives8.trace.json       |  5 +-
 .../typeReferenceDirectives9.trace.json       | 14 ++-
 tests/baselines/reference/typingsLookup1.js   |  2 +
 .../reference/typingsLookup1.symbols          |  5 +-
 .../reference/typingsLookup1.trace.json       | 18 ++++
 .../baselines/reference/typingsLookup1.types  |  5 +-
 tests/cases/compiler/commonSourceDir5.ts      |  1 +
 .../compiler/typeReferenceDirectives1.ts      |  2 +-
 .../compiler/typeReferenceDirectives10.ts     |  2 +-
 .../compiler/typeReferenceDirectives11.ts     |  2 +-
 .../compiler/typeReferenceDirectives12.ts     |  2 +-
 .../compiler/typeReferenceDirectives13.ts     |  2 +-
 .../compiler/typeReferenceDirectives2.ts      |  2 +-
 .../compiler/typeReferenceDirectives3.ts      |  2 +-
 .../compiler/typeReferenceDirectives4.ts      |  2 +-
 .../compiler/typeReferenceDirectives5.ts      |  2 +-
 .../compiler/typeReferenceDirectives6.ts      |  2 +-
 .../compiler/typeReferenceDirectives7.ts      |  2 +-
 .../compiler/typeReferenceDirectives8.ts      |  2 +-
 .../compiler/typeReferenceDirectives9.ts      |  2 +-
 .../references/library-reference-1.ts         |  7 +-
 .../references/library-reference-10.ts        |  9 +-
 .../references/library-reference-13.ts        |  3 +-
 .../references/library-reference-14.ts        |  3 +-
 .../references/library-reference-15.ts        |  8 +-
 .../references/library-reference-2.ts         |  3 +-
 .../references/library-reference-3.ts         |  2 +-
 .../references/library-reference-4.ts         |  3 +-
 .../references/library-reference-5.ts         |  1 +
 .../references/library-reference-6.ts         |  6 +-
 .../references/library-reference-8.ts         |  9 +-
 .../references/library-reference-9.ts         | 20 ----
 .../conformance/typings/typingsLookup1.ts     |  8 +-
 .../goToDefinitionTypeReferenceDirective.ts   |  2 +-
 .../goToDefinitionTypeReferenceDirective.ts   |  2 +-
 .../goToDefinitionTypeReferenceDirective.ts   |  4 +-
 tests/cases/unittests/moduleResolution.ts     | 29 +++---
 .../cases/unittests/reuseProgramStructure.ts  |  5 +-
 99 files changed, 605 insertions(+), 562 deletions(-)
 delete mode 100644 tests/baselines/reference/library-reference-6.symbols
 delete mode 100644 tests/baselines/reference/library-reference-6.types
 delete mode 100644 tests/baselines/reference/library-reference-9.js
 delete mode 100644 tests/baselines/reference/library-reference-9.symbols
 delete mode 100644 tests/baselines/reference/library-reference-9.trace.json
 delete mode 100644 tests/baselines/reference/library-reference-9.types
 create mode 100644 tests/baselines/reference/moduleResolutionWithSymlinks.errors.txt
 delete mode 100644 tests/baselines/reference/moduleResolutionWithSymlinks.symbols
 delete mode 100644 tests/baselines/reference/moduleResolutionWithSymlinks.types
 create mode 100644 tests/baselines/reference/typingsLookup1.trace.json
 delete mode 100644 tests/cases/conformance/references/library-reference-9.ts

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 506a2d5bee4..a79d365fdd4 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -337,8 +337,12 @@ namespace ts {
             }
         },
         {
-            name: "typesRoot",
-            type: "string"
+            name: "typeRoots",
+            type: "list",
+            element: {
+                name: "typeRoots",
+                type: "string"
+            }            
         },
         {
             name: "types",
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index 034bd27b147..c7052cf71fe 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -1935,6 +1935,10 @@
         "category": "Error",
         "code": 2687
     },
+    "Cannot find type definition file for '{0}'.": {
+        "category": "Error",
+        "code": 2688
+    },
     "Import declaration '{0}' is using private name '{1}'.": {
         "category": "Error",
         "code": 4000
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index bab554927e7..f7750e43002 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -9,16 +9,11 @@ namespace ts {
     /* @internal */ export let ioWriteTime = 0;
 
     /** The version of the TypeScript compiler release */
+    export const version = "1.9.0";
 
     const emptyArray: any[] = [];
 
-    const defaultLibrarySearchPaths = [
-        "types/",
-        "node_modules/",
-        "node_modules/@types/",
-    ];
-
-    export const version = "1.9.0";
+    const defaultTypeRoots = ["node_modules/@types"];
 
     export function findConfigFile(searchPath: string, fileExists: (fileName: string) => boolean): string {
         while (true) {
@@ -196,24 +191,22 @@ namespace ts {
             traceEnabled
         };
 
-        // use typesRoot and fallback to directory that contains tsconfig or current directory if typesRoot is not set
-        const rootDir = options.typesRoot || (options.configFilePath ? getDirectoryPath(options.configFilePath) : (host.getCurrentDirectory && host.getCurrentDirectory()));
-
+        const typeRoots = options.typeRoots || defaultTypeRoots;
         if (traceEnabled) {
             if (containingFile === undefined) {
-                if (rootDir === undefined) {
+                if (typeRoots === undefined) {
                     trace(host, Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_not_set, typeReferenceDirectiveName);
                 }
                 else {
-                    trace(host, Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, rootDir);
+                    trace(host, Diagnostics.Resolving_type_reference_directive_0_containing_file_not_set_root_directory_1, typeReferenceDirectiveName, typeRoots);
                 }
             }
             else {
-                if (rootDir === undefined) {
+                if (typeRoots === undefined) {
                     trace(host, Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_not_set, typeReferenceDirectiveName, containingFile);
                 }
                 else {
-                    trace(host, Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, rootDir);
+                    trace(host, Diagnostics.Resolving_type_reference_directive_0_containing_file_1_root_directory_2, typeReferenceDirectiveName, containingFile, typeRoots);
                 }
             }
         }
@@ -221,14 +214,13 @@ namespace ts {
         const failedLookupLocations: string[] = [];
 
         // Check primary library paths
-        if (rootDir !== undefined) {
-            const effectivePrimarySearchPaths = options.typesSearchPaths || defaultLibrarySearchPaths;
-            for (const searchPath of effectivePrimarySearchPaths) {
-                const primaryPath = combinePaths(rootDir, searchPath);
-                if (traceEnabled) {
-                    trace(host, Diagnostics.Resolving_with_primary_search_path_0, primaryPath);
-                }
-                const candidate = combinePaths(primaryPath, typeReferenceDirectiveName);
+        if (typeRoots.length) {
+            if (traceEnabled) {
+                trace(host, Diagnostics.Resolving_with_primary_search_path_0, typeRoots.join(', '));
+            }
+            const primarySearchPaths = options.typeRoots || defaultTypeRoots;
+            for (const typeRoot of primarySearchPaths) {
+                const candidate = combinePaths(typeRoot, typeReferenceDirectiveName);
                 const candidateDirectory = getDirectoryPath(candidate);
                 const resolvedFile = loadNodeModuleFromDirectory(typeReferenceExtensions, candidate, failedLookupLocations,
                     !directoryProbablyExists(candidateDirectory, host), moduleResolutionState);
@@ -255,9 +247,6 @@ namespace ts {
         if (containingFile) {
             initialLocationForSecondaryLookup = getDirectoryPath(containingFile);
         }
-        else {
-            initialLocationForSecondaryLookup = rootDir;
-        }
 
         if (initialLocationForSecondaryLookup !== undefined) {
             // check secondary locations
@@ -875,19 +864,6 @@ namespace ts {
             }
         }
 
-        function getDefaultTypeDirectiveNames(rootPath: string): string[] {
-            const localTypes = combinePaths(rootPath, "types");
-            const npmTypes = combinePaths(rootPath, "node_modules/@types");
-            let result: string[] = [];
-            if (sys.directoryExists(localTypes)) {
-                result = result.concat(sys.getDirectories(localTypes));
-            }
-            if (sys.directoryExists(npmTypes)) {
-                result = result.concat(sys.getDirectories(npmTypes));
-            }
-            return result;
-        }
-
         function getDefaultLibLocation(): string {
             return getDirectoryPath(normalizePath(sys.getExecutingFilePath()));
         }
@@ -896,7 +872,6 @@ namespace ts {
         const realpath = sys.realpath && ((path: string) => sys.realpath(path));
 
         return {
-            getDefaultTypeDirectiveNames,
             getSourceFile,
             getDefaultLibLocation,
             getDefaultLibFileName: options => combinePaths(getDefaultLibLocation(), getDefaultLibFileName(options)),
@@ -909,6 +884,7 @@ namespace ts {
             readFile: fileName => sys.readFile(fileName),
             trace: (s: string) => sys.write(s + newLine),
             directoryExists: directoryName => sys.directoryExists(directoryName),
+            getDirectories: (path: string) => sys.getDirectories(path),
             realpath
         };
     }
@@ -972,21 +948,34 @@ namespace ts {
         return resolutions;
     }
 
-    export function getDefaultTypeDirectiveNames(options: CompilerOptions, rootFiles: string[], host: CompilerHost): string[] {
+    function getInferredTypesRoot(options: CompilerOptions, rootFiles: string[], host: CompilerHost) {
+        return computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), f => host.getCanonicalFileName(f));
+    }
+
+    /**
+      * Given a set of options and a set of root files, returns the set of type directive names
+      *   that should be included for this program automatically.
+      * This list could either come from the config file,
+      *   or from enumerating the types root + initial secondary types lookup location.
+      * More type directives might appear in the program later as a result of loading actual source files;
+      *   this list is only the set of defaults that are implicitly included.
+      */
+    export function getAutomaticTypeDirectiveNames(options: CompilerOptions, rootFiles: string[], host: CompilerHost): string[] {
         // Use explicit type list from tsconfig.json
         if (options.types) {
             return options.types;
         }
 
-        // or load all types from the automatic type import fields
-        if (host && host.getDefaultTypeDirectiveNames) {
-            const commonRoot = computeCommonSourceDirectoryOfFilenames(rootFiles, host.getCurrentDirectory(), f => host.getCanonicalFileName(f));
-            if (commonRoot) {
-                return host.getDefaultTypeDirectiveNames(commonRoot);
+        // Walk the primary type lookup locations
+        let result: string[] = [];
+        if (host.directoryExists && host.getDirectories) {
+            for (const root of options.typeRoots || defaultTypeRoots) {
+                if (host.directoryExists(root)) {
+                    result = result.concat(host.getDirectories(root));
+                }
             }
         }
-
-        return undefined;
+        return result;
     }
 
     export function createProgram(rootNames: string[], options: CompilerOptions, host?: CompilerHost, oldProgram?: Program): Program {
@@ -1038,11 +1027,13 @@ namespace ts {
         if (!tryReuseStructureFromOldProgram()) {
             forEach(rootNames, name => processRootFile(name, /*isDefaultLib*/ false));
 
-            // load type declarations specified via 'types' argument
-            const typeReferences: string[] = getDefaultTypeDirectiveNames(options, rootNames, host);
+            // load type declarations specified via 'types' argument or implicitly from types/ and node_modules/@types folders
+            const typeReferences: string[] = getAutomaticTypeDirectiveNames(options, rootNames, host);
 
             if (typeReferences) {
-                const resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, /*containingFile*/ undefined);
+                const inferredRoot = getInferredTypesRoot(options, rootNames, host);
+                const containingFilename = combinePaths(inferredRoot, "__inferred type names__.ts");
+                const resolutions = resolveTypeReferenceDirectiveNamesWorker(typeReferences, containingFilename);
                 for (let i = 0; i < typeReferences.length; i++) {
                     processTypeReferenceDirective(typeReferences[i], resolutions[i]);
                 }
@@ -1149,10 +1140,9 @@ namespace ts {
                 (oldOptions.jsx !== options.jsx) ||
                 (oldOptions.allowJs !== options.allowJs) ||
                 (oldOptions.rootDir !== options.rootDir) ||
-                (oldOptions.typesSearchPaths !== options.typesSearchPaths) ||
                 (oldOptions.configFilePath !== options.configFilePath) ||
                 (oldOptions.baseUrl !== options.baseUrl) ||
-                (oldOptions.typesRoot !== options.typesRoot) ||
+                (oldOptions.typeRoots !== options.typeRoots) ||
                 !arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
                 !mapIsEqualTo(oldOptions.paths, options.paths)) {
                 return false;
@@ -1904,7 +1894,7 @@ namespace ts {
                 }
             }
             else {
-                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, Diagnostics.Cannot_find_name_0, typeReferenceDirective));
+                fileProcessingDiagnostics.add(createDiagnostic(refFile, refPos, refEnd, Diagnostics.Cannot_find_type_definition_file_for_0, typeReferenceDirective));
             }
 
             if (saveResolution) {
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index a86b1ed708d..7f53ac29eaf 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2496,7 +2496,6 @@ namespace ts {
         jsx?: JsxEmit;
         reactNamespace?: string;
         listFiles?: boolean;
-        typesSearchPaths?: string[];
         locale?: string;
         mapRoot?: string;
         module?: ModuleKind;
@@ -2555,8 +2554,8 @@ namespace ts {
         // When options come from a config file, its path is recorded here
         configFilePath?: string;
         /* @internal */
-        // Path used to used to compute primary search locations
-        typesRoot?: string;
+        // Paths used to used to compute primary types search locations
+        typeRoots?: string[];
         types?: string[];
 
         list?: string[];
@@ -2861,9 +2860,9 @@ namespace ts {
         getCancellationToken?(): CancellationToken;
         getDefaultLibFileName(options: CompilerOptions): string;
         getDefaultLibLocation?(): string;
-        getDefaultTypeDirectiveNames?(rootPath: string): string[];
         writeFile: WriteFileCallback;
         getCurrentDirectory(): string;
+        getDirectories(path: string): string[];
         getCanonicalFileName(fileName: string): string;
         useCaseSensitiveFileNames(): boolean;
         getNewLine(): string;
diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index c05fca5bb47..8104f113392 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -246,8 +246,8 @@ namespace FourSlash {
             // Create a new Services Adapter
             this.cancellationToken = new TestCancellationToken();
             const compilationOptions = convertGlobalOptionsToCompilerOptions(this.testData.globalOptions);
-            if (compilationOptions.typesRoot) {
-                compilationOptions.typesRoot = ts.getNormalizedAbsolutePath(compilationOptions.typesRoot, this.basePath);
+            if (compilationOptions.typeRoots) {
+                compilationOptions.typeRoots = compilationOptions.typeRoots.map(p => ts.getNormalizedAbsolutePath(p, this.basePath));
             }
 
             const languageServiceAdapter = this.getLanguageServiceAdapter(testType, this.cancellationToken, compilationOptions);
diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index 5fe5b84ac91..37066abd9bd 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -432,6 +432,7 @@ namespace Harness {
         readFile(path: string): string;
         writeFile(path: string, contents: string): void;
         directoryName(path: string): string;
+        getDirectories(path: string): string[];
         createDirectory(path: string): void;
         fileExists(fileName: string): boolean;
         directoryExists(path: string): boolean;
@@ -477,6 +478,7 @@ namespace Harness {
             export const readFile: typeof IO.readFile = path => ts.sys.readFile(path);
             export const writeFile: typeof IO.writeFile = (path, content) => ts.sys.writeFile(path, content);
             export const directoryName: typeof IO.directoryName = fso.GetParentFolderName;
+            export const getDirectories: typeof IO.getDirectories = dir => ts.sys.getDirectories(dir);
             export const directoryExists: typeof IO.directoryExists = fso.FolderExists;
             export const fileExists: typeof IO.fileExists = fso.FileExists;
             export const log: typeof IO.log = global.WScript && global.WScript.StdOut.WriteLine;
@@ -543,6 +545,7 @@ namespace Harness {
             export const args = () => ts.sys.args;
             export const getExecutingFilePath = () => ts.sys.getExecutingFilePath();
             export const exit = (exitCode: number) => ts.sys.exit(exitCode);
+            export const getDirectories: typeof IO.getDirectories = path => ts.sys.getDirectories(path);
 
             export const readFile: typeof IO.readFile = path => ts.sys.readFile(path);
             export const writeFile: typeof IO.writeFile = (path, content) => ts.sys.writeFile(path, content);
@@ -616,6 +619,7 @@ namespace Harness {
             export const args = () => <string[]>[];
             export const getExecutingFilePath = () => "";
             export const exit = (exitCode: number) => { };
+            export const getDirectories = () => <string[]>[];
 
             export let log = (s: string) => console.log(s);
 
@@ -861,7 +865,7 @@ namespace Harness {
             // Local get canonical file name function, that depends on passed in parameter for useCaseSensitiveFileNames
             const getCanonicalFileName = ts.createGetCanonicalFileName(useCaseSensitiveFileNames);
 
-            let realPathMap: ts.FileMap<string>;
+            const realPathMap: ts.FileMap<string> = ts.createFileMap<string>();
             const fileMap: ts.FileMap<() => ts.SourceFile> = ts.createFileMap<() => ts.SourceFile>();
             for (const file of inputFiles) {
                 if (file.content !== undefined) {
@@ -870,9 +874,6 @@ namespace Harness {
                     if (file.fileOptions && file.fileOptions["symlink"]) {
                         const link = file.fileOptions["symlink"];
                         const linkPath = ts.toPath(link, currentDirectory, getCanonicalFileName);
-                        if (!realPathMap) {
-                            realPathMap = ts.createFileMap<string>();
-                        }
                         realPathMap.set(linkPath, fileName);
                         fileMap.set(path, (): ts.SourceFile => { throw new Error("Symlinks should always be resolved to a realpath first"); });
                     }
@@ -906,20 +907,6 @@ namespace Harness {
 
 
             return {
-                getDefaultTypeDirectiveNames: (path: string) => {
-                    const results: string[] = [];
-                    fileMap.forEachValue((key, value) => {
-                        const rx = /node_modules\/@types\/(\w+)/;
-                        const typeNameResult = rx.exec(key);
-                        if (typeNameResult) {
-                            const typeName = typeNameResult[1];
-                            if (results.indexOf(typeName) < 0) {
-                                results.push(typeName);
-                            }
-                        }
-                    });
-                    return results;
-                },
                 getCurrentDirectory: () => currentDirectory,
                 getSourceFile,
                 getDefaultLibFileName,
@@ -937,7 +924,37 @@ namespace Harness {
                 realpath: realPathMap && ((f: string) => {
                     const path = ts.toPath(f, currentDirectory, getCanonicalFileName);
                     return realPathMap.contains(path) ? realPathMap.get(path) : path;
-                })
+                }),
+                directoryExists: dir => {
+                    let path = ts.toPath(dir, currentDirectory, getCanonicalFileName);
+                    // Strip trailing /, which may exist if the path is a drive root
+                    if (path[path.length - 1] === "/") {
+                        path = <ts.Path>path.substr(0, path.length - 1);
+                    }
+                    let exists = false;
+                    fileMap.forEachValue(key => {
+                        if (key.indexOf(path) === 0 && key[path.length] === "/") {
+                            exists = true;
+                        }
+                    });
+                    return exists;
+                },
+                getDirectories: d => {
+                    const path = ts.toPath(d, currentDirectory, getCanonicalFileName);
+                    const result: string[] = [];
+                    fileMap.forEachValue((key, value) => {
+                        if (key.indexOf(path) === 0 && key.lastIndexOf("/") > path.length) {
+                            let dirName = key.substr(path.length, key.indexOf("/", path.length + 1) - path.length);
+                            if (dirName[0] === "/") {
+                                dirName = dirName.substr(1);
+                            }
+                            if (result.indexOf(dirName) < 0) {
+                                result.push(dirName);
+                            }
+                        }
+                    });
+                    return result;
+                }
             };
         }
 
@@ -1036,7 +1053,9 @@ namespace Harness {
             options.noErrorTruncation = true;
             options.skipDefaultLibCheck = true;
 
-            currentDirectory = currentDirectory || Harness.IO.getCurrentDirectory();
+            if (typeof currentDirectory === "undefined") {
+                currentDirectory = Harness.IO.getCurrentDirectory();
+            }
 
             // Parse settings
             if (harnessSettings) {
diff --git a/src/harness/harnessLanguageService.ts b/src/harness/harnessLanguageService.ts
index b3478e40609..c9d31447df7 100644
--- a/src/harness/harnessLanguageService.ts
+++ b/src/harness/harnessLanguageService.ts
@@ -246,16 +246,21 @@ namespace Harness.LanguageService {
                 };
                 this.getTypeReferenceDirectiveResolutionsForFile = (fileName) => {
                     const scriptInfo = this.getScriptInfo(fileName);
-                    const preprocessInfo = ts.preProcessFile(scriptInfo.content, /*readImportFiles*/ false);
-                    const resolutions: ts.Map<ts.ResolvedTypeReferenceDirective> = {};
-                    const settings = this.nativeHost.getCompilationSettings();
-                    for (const typeReferenceDirective of preprocessInfo.typeReferenceDirectives) {
-                        const resolutionInfo = ts.resolveTypeReferenceDirective(typeReferenceDirective.fileName, fileName, settings, moduleResolutionHost);
-                        if (resolutionInfo.resolvedTypeReferenceDirective.resolvedFileName) {
-                            resolutions[typeReferenceDirective.fileName] = resolutionInfo.resolvedTypeReferenceDirective;
+                    if (scriptInfo) {
+                        const preprocessInfo = ts.preProcessFile(scriptInfo.content, /*readImportFiles*/ false);
+                        const resolutions: ts.Map<ts.ResolvedTypeReferenceDirective> = {};
+                        const settings = this.nativeHost.getCompilationSettings();
+                        for (const typeReferenceDirective of preprocessInfo.typeReferenceDirectives) {
+                            const resolutionInfo = ts.resolveTypeReferenceDirective(typeReferenceDirective.fileName, fileName, settings, moduleResolutionHost);
+                            if (resolutionInfo.resolvedTypeReferenceDirective.resolvedFileName) {
+                                resolutions[typeReferenceDirective.fileName] = resolutionInfo.resolvedTypeReferenceDirective;
+                            }
                         }
+                        return JSON.stringify(resolutions);
+                    }
+                    else {
+                        return "[]";
                     }
-                    return JSON.stringify(resolutions);
                 };
             }
         }
diff --git a/src/harness/projectsRunner.ts b/src/harness/projectsRunner.ts
index 64d07b1d88a..6bf73ecced7 100644
--- a/src/harness/projectsRunner.ts
+++ b/src/harness/projectsRunner.ts
@@ -185,7 +185,8 @@ class ProjectRunner extends RunnerBase {
                     useCaseSensitiveFileNames: () => Harness.IO.useCaseSensitiveFileNames(),
                     getNewLine: () => Harness.IO.newLine(),
                     fileExists: fileName => fileName === Harness.Compiler.defaultLibFileName ||  getSourceFileText(fileName) !== undefined,
-                    readFile: fileName => Harness.IO.readFile(fileName)
+                    readFile: fileName => Harness.IO.readFile(fileName),
+                    getDirectories: path => Harness.IO.getDirectories(path)
                 };
             }
         }
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 8eae43b503d..a53e9b3d5a0 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -315,6 +315,10 @@ namespace ts.server {
             return this.host.directoryExists(path);
         }
 
+        getDirectories(path: string): string[] {
+            return this.host.getDirectories ? this.host.getDirectories(path) : [];
+        }
+
         /**
          *  @param line 1 based index
          */
diff --git a/src/services/services.ts b/src/services/services.ts
index 34b521b3496..10d9f9e48ef 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1058,6 +1058,7 @@ namespace ts {
         resolveModuleNames?(moduleNames: string[], containingFile: string): ResolvedModule[];
         resolveTypeReferenceDirectives?(typeDirectiveNames: string[], containingFile: string): ResolvedTypeReferenceDirective[];
         directoryExists?(directoryName: string): boolean;
+        getDirectories?(directoryName: string): string[];
     }
 
     //
@@ -1983,7 +1984,8 @@ namespace ts {
             getNewLine: () => newLine,
             fileExists: (fileName): boolean => fileName === inputFileName,
             readFile: (fileName): string => "",
-            directoryExists: directoryExists => true
+            directoryExists: directoryExists => true,
+            getDirectories: (path: string) => []
         };
 
         const program = createProgram([inputFileName], options, compilerHost);
@@ -2086,7 +2088,7 @@ namespace ts {
         const getCanonicalFileName = createGetCanonicalFileName(!!useCaseSensitiveFileNames);
 
         function getKeyForCompilationSettings(settings: CompilerOptions): DocumentRegistryBucketKey {
-            return <DocumentRegistryBucketKey>`_${settings.target}|${settings.module}|${settings.noResolve}|${settings.jsx}|${settings.allowJs}|${settings.baseUrl}|${settings.typesRoot}|${settings.typesSearchPaths}|${JSON.stringify(settings.rootDirs)}|${JSON.stringify(settings.paths)}`;
+            return <DocumentRegistryBucketKey>`_${settings.target}|${settings.module}|${settings.noResolve}|${settings.jsx}|${settings.allowJs}|${settings.baseUrl}|${settings.typeRoots}|${JSON.stringify(settings.rootDirs)}|${JSON.stringify(settings.paths)}`;
         }
 
         function getBucketForCompilationSettings(key: DocumentRegistryBucketKey, createIfMissing: boolean): FileMap<DocumentRegistryEntry> {
@@ -2945,8 +2947,10 @@ namespace ts {
                     return entry && entry.scriptSnapshot.getText(0, entry.scriptSnapshot.getLength());
                 },
                 directoryExists: directoryName => {
-                    Debug.assert(!host.resolveModuleNames || !host.resolveTypeReferenceDirectives);
                     return directoryProbablyExists(directoryName, host);
+                },
+                getDirectories: path => {
+                    return host.getDirectories ? host.getDirectories(path) : [];
                 }
             };
             if (host.trace) {
diff --git a/tests/baselines/reference/commonSourceDir5.js b/tests/baselines/reference/commonSourceDir5.js
index 7a43aba254e..1e404b26e13 100644
--- a/tests/baselines/reference/commonSourceDir5.js
+++ b/tests/baselines/reference/commonSourceDir5.js
@@ -1,6 +1,7 @@
 //// [tests/cases/compiler/commonSourceDir5.ts] ////
 
 //// [bar.ts]
+
 import {z} from "./foo";
 export var x = z + z;
 
diff --git a/tests/baselines/reference/commonSourceDir5.symbols b/tests/baselines/reference/commonSourceDir5.symbols
index 6426ac39de3..67494af40fa 100644
--- a/tests/baselines/reference/commonSourceDir5.symbols
+++ b/tests/baselines/reference/commonSourceDir5.symbols
@@ -1,11 +1,12 @@
 === A:/bar.ts ===
+
 import {z} from "./foo";
->z : Symbol(z, Decl(bar.ts, 0, 8))
+>z : Symbol(z, Decl(bar.ts, 1, 8))
 
 export var x = z + z;
->x : Symbol(x, Decl(bar.ts, 1, 10))
->z : Symbol(z, Decl(bar.ts, 0, 8))
->z : Symbol(z, Decl(bar.ts, 0, 8))
+>x : Symbol(x, Decl(bar.ts, 2, 10))
+>z : Symbol(z, Decl(bar.ts, 1, 8))
+>z : Symbol(z, Decl(bar.ts, 1, 8))
 
 === A:/foo.ts ===
 import {pi} from "B:/baz";
diff --git a/tests/baselines/reference/commonSourceDir5.types b/tests/baselines/reference/commonSourceDir5.types
index ff13bb20215..dd72099d542 100644
--- a/tests/baselines/reference/commonSourceDir5.types
+++ b/tests/baselines/reference/commonSourceDir5.types
@@ -1,4 +1,5 @@
 === A:/bar.ts ===
+
 import {z} from "./foo";
 >z : number
 
diff --git a/tests/baselines/reference/library-reference-1.symbols b/tests/baselines/reference/library-reference-1.symbols
index 0e848c626c5..14a6b115009 100644
--- a/tests/baselines/reference/library-reference-1.symbols
+++ b/tests/baselines/reference/library-reference-1.symbols
@@ -1,11 +1,11 @@
-=== /consumer.ts ===
+=== /src/consumer.ts ===
 /// <reference types="jquery" />
 $.foo();
 >$.foo : Symbol(foo, Decl(index.d.ts, 3, 16))
 >$ : Symbol($, Decl(index.d.ts, 3, 11))
 >foo : Symbol(foo, Decl(index.d.ts, 3, 16))
 
-=== /types/jquery/index.d.ts ===
+=== /src/types/jquery/index.d.ts ===
 
 // We can find typings in the ./types folder
 
diff --git a/tests/baselines/reference/library-reference-1.trace.json b/tests/baselines/reference/library-reference-1.trace.json
index 1b8c237dff1..71557236240 100644
--- a/tests/baselines/reference/library-reference-1.trace.json
+++ b/tests/baselines/reference/library-reference-1.trace.json
@@ -1,7 +1,12 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/consumer.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/jquery/package.json' does not exist.",
-    "File '/types/jquery/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'jquery' was successfully resolved to '/types/jquery/index.d.ts', primary: true. ========"
+    "======== Resolving type reference directive 'jquery', containing file '/src/consumer.ts', root directory 'types'. ========",
+    "Resolving with primary search path 'types'",
+    "File 'types/jquery/package.json' does not exist.",
+    "File 'types/jquery/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'jquery' was successfully resolved to 'types/jquery/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'jquery', containing file '/src/__inferred type names__.ts', root directory 'types'. ========",
+    "Resolving with primary search path 'types'",
+    "File 'types/jquery/package.json' does not exist.",
+    "File 'types/jquery/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'jquery' was successfully resolved to 'types/jquery/index.d.ts', primary: true. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/library-reference-1.types b/tests/baselines/reference/library-reference-1.types
index 99133f2f8df..c247e94617e 100644
--- a/tests/baselines/reference/library-reference-1.types
+++ b/tests/baselines/reference/library-reference-1.types
@@ -1,4 +1,4 @@
-=== /consumer.ts ===
+=== /src/consumer.ts ===
 /// <reference types="jquery" />
 $.foo();
 >$.foo() : void
@@ -6,7 +6,7 @@ $.foo();
 >$ : { foo(): void; }
 >foo : () => void
 
-=== /types/jquery/index.d.ts ===
+=== /src/types/jquery/index.d.ts ===
 
 // We can find typings in the ./types folder
 
diff --git a/tests/baselines/reference/library-reference-10.symbols b/tests/baselines/reference/library-reference-10.symbols
index 9d0f7e4781e..50159b4bfc3 100644
--- a/tests/baselines/reference/library-reference-10.symbols
+++ b/tests/baselines/reference/library-reference-10.symbols
@@ -1,11 +1,11 @@
-=== /consumer.ts ===
+=== /foo/consumer.ts ===
 /// <reference types="jquery" />
 $.foo();
 >$.foo : Symbol(foo, Decl(jquery.d.ts, 0, 16))
 >$ : Symbol($, Decl(jquery.d.ts, 0, 11))
 >foo : Symbol(foo, Decl(jquery.d.ts, 0, 16))
 
-=== /types/jquery/jquery.d.ts ===
+=== /foo/types/jquery/jquery.d.ts ===
 declare var $: { foo(): void };
 >$ : Symbol($, Decl(jquery.d.ts, 0, 11))
 >foo : Symbol(foo, Decl(jquery.d.ts, 0, 16))
diff --git a/tests/baselines/reference/library-reference-10.trace.json b/tests/baselines/reference/library-reference-10.trace.json
index e6a1918a446..f4df00fa52d 100644
--- a/tests/baselines/reference/library-reference-10.trace.json
+++ b/tests/baselines/reference/library-reference-10.trace.json
@@ -1,8 +1,14 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/consumer.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "Found 'package.json' at '/types/jquery/package.json'.",
-    "'package.json' has 'typings' field 'jquery.d.ts' that references '/types/jquery/jquery.d.ts'.",
-    "File '/types/jquery/jquery.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'jquery' was successfully resolved to '/types/jquery/jquery.d.ts', primary: true. ========"
+    "======== Resolving type reference directive 'jquery', containing file '/foo/consumer.ts', root directory './types'. ========",
+    "Resolving with primary search path './types'",
+    "Found 'package.json' at './types/jquery/package.json'.",
+    "'package.json' has 'typings' field 'jquery.d.ts' that references 'types/jquery/jquery.d.ts'.",
+    "File 'types/jquery/jquery.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'jquery' was successfully resolved to 'types/jquery/jquery.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'jquery', containing file '/foo/__inferred type names__.ts', root directory './types'. ========",
+    "Resolving with primary search path './types'",
+    "Found 'package.json' at './types/jquery/package.json'.",
+    "'package.json' has 'typings' field 'jquery.d.ts' that references 'types/jquery/jquery.d.ts'.",
+    "File 'types/jquery/jquery.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'jquery' was successfully resolved to 'types/jquery/jquery.d.ts', primary: true. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/library-reference-10.types b/tests/baselines/reference/library-reference-10.types
index 42d78f72865..ca588d0bc03 100644
--- a/tests/baselines/reference/library-reference-10.types
+++ b/tests/baselines/reference/library-reference-10.types
@@ -1,4 +1,4 @@
-=== /consumer.ts ===
+=== /foo/consumer.ts ===
 /// <reference types="jquery" />
 $.foo();
 >$.foo() : void
@@ -6,7 +6,7 @@ $.foo();
 >$ : { foo(): void; }
 >foo : () => void
 
-=== /types/jquery/jquery.d.ts ===
+=== /foo/types/jquery/jquery.d.ts ===
 declare var $: { foo(): void };
 >$ : { foo(): void; }
 >foo : () => void
diff --git a/tests/baselines/reference/library-reference-11.trace.json b/tests/baselines/reference/library-reference-11.trace.json
index 62d828d57d6..7f6a32a0b23 100644
--- a/tests/baselines/reference/library-reference-11.trace.json
+++ b/tests/baselines/reference/library-reference-11.trace.json
@@ -1,14 +1,8 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/jquery/package.json' does not exist.",
-    "File '/types/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/'",
-    "File '/node_modules/jquery/package.json' does not exist.",
-    "File '/node_modules/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/@types/'",
-    "File '/node_modules/@types/jquery/package.json' does not exist.",
-    "File '/node_modules/@types/jquery/index.d.ts' does not exist.",
+    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory 'node_modules/@types'. ========",
+    "Resolving with primary search path 'node_modules/@types'",
+    "File 'node_modules/@types/jquery/package.json' does not exist.",
+    "File 'node_modules/@types/jquery/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/a/b'",
     "File '/a/b/node_modules/jquery.ts' does not exist.",
     "File '/a/b/node_modules/jquery.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-12.trace.json b/tests/baselines/reference/library-reference-12.trace.json
index abe1f6c0f46..b3debaec9d6 100644
--- a/tests/baselines/reference/library-reference-12.trace.json
+++ b/tests/baselines/reference/library-reference-12.trace.json
@@ -1,14 +1,8 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/jquery/package.json' does not exist.",
-    "File '/types/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/'",
-    "File '/node_modules/jquery/package.json' does not exist.",
-    "File '/node_modules/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/@types/'",
-    "File '/node_modules/@types/jquery/package.json' does not exist.",
-    "File '/node_modules/@types/jquery/index.d.ts' does not exist.",
+    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory 'node_modules/@types'. ========",
+    "Resolving with primary search path 'node_modules/@types'",
+    "File 'node_modules/@types/jquery/package.json' does not exist.",
+    "File 'node_modules/@types/jquery/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/a/b'",
     "File '/a/b/node_modules/jquery.ts' does not exist.",
     "File '/a/b/node_modules/jquery.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-13.trace.json b/tests/baselines/reference/library-reference-13.trace.json
index 2133414f414..d8dfb57c2a6 100644
--- a/tests/baselines/reference/library-reference-13.trace.json
+++ b/tests/baselines/reference/library-reference-13.trace.json
@@ -1,6 +1,6 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file not set, root directory '/a'. ========",
-    "Resolving with primary search path '/a/types/'",
+    "======== Resolving type reference directive 'jquery', containing file '/a/b/__inferred type names__.ts', root directory '/a/types'. ========",
+    "Resolving with primary search path '/a/types'",
     "File '/a/types/jquery/package.json' does not exist.",
     "File '/a/types/jquery/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'jquery' was successfully resolved to '/a/types/jquery/index.d.ts', primary: true. ========"
diff --git a/tests/baselines/reference/library-reference-14.trace.json b/tests/baselines/reference/library-reference-14.trace.json
index 2133414f414..d8dfb57c2a6 100644
--- a/tests/baselines/reference/library-reference-14.trace.json
+++ b/tests/baselines/reference/library-reference-14.trace.json
@@ -1,6 +1,6 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file not set, root directory '/a'. ========",
-    "Resolving with primary search path '/a/types/'",
+    "======== Resolving type reference directive 'jquery', containing file '/a/b/__inferred type names__.ts', root directory '/a/types'. ========",
+    "Resolving with primary search path '/a/types'",
     "File '/a/types/jquery/package.json' does not exist.",
     "File '/a/types/jquery/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'jquery' was successfully resolved to '/a/types/jquery/index.d.ts', primary: true. ========"
diff --git a/tests/baselines/reference/library-reference-15.errors.txt b/tests/baselines/reference/library-reference-15.errors.txt
index a311633ca76..9586ba8bc72 100644
--- a/tests/baselines/reference/library-reference-15.errors.txt
+++ b/tests/baselines/reference/library-reference-15.errors.txt
@@ -1,15 +1,15 @@
-error TS2304: Cannot find name 'jquery'.
-/a/b/consumer.ts(1,1): error TS2304: Cannot find name '$'.
+/a/b/consumer.ts(2,1): error TS2304: Cannot find name '$2'.
 
 
-!!! error TS2304: Cannot find name 'jquery'.
 ==== /a/b/consumer.ts (1 errors) ====
-    $.foo();
-    ~
-!!! error TS2304: Cannot find name '$'.
-    
+    $.foo(); // should OK
+    $2.foo(); // should error
+    ~~
+!!! error TS2304: Cannot find name '$2'.
 ==== /a/types/jquery/index.d.ts (0 errors) ====
     
     declare var $: { foo(): void };
     
+==== /a/types/jquery2/index.d.ts (0 errors) ====
+    declare var $2: { foo(): void };
     
\ No newline at end of file
diff --git a/tests/baselines/reference/library-reference-15.js b/tests/baselines/reference/library-reference-15.js
index f9aa7038d53..c1caa0c45e7 100644
--- a/tests/baselines/reference/library-reference-15.js
+++ b/tests/baselines/reference/library-reference-15.js
@@ -3,11 +3,14 @@
 //// [index.d.ts]
 
 declare var $: { foo(): void };
-
+
+//// [index.d.ts]
+declare var $2: { foo(): void };
 
 //// [consumer.ts]
-$.foo();
-
+$.foo(); // should OK
+$2.foo(); // should error
 
 //// [consumer.js]
-$.foo();
+$.foo(); // should OK
+$2.foo(); // should error
diff --git a/tests/baselines/reference/library-reference-15.trace.json b/tests/baselines/reference/library-reference-15.trace.json
index b8029a0b61f..3e9d7dba1d2 100644
--- a/tests/baselines/reference/library-reference-15.trace.json
+++ b/tests/baselines/reference/library-reference-15.trace.json
@@ -1,24 +1,7 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file not set, root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/jquery/package.json' does not exist.",
-    "File '/types/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/'",
-    "File '/node_modules/jquery/package.json' does not exist.",
-    "File '/node_modules/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/@types/'",
-    "File '/node_modules/@types/jquery/package.json' does not exist.",
-    "File '/node_modules/@types/jquery/index.d.ts' does not exist.",
-    "Looking up in 'node_modules' folder, initial location '/'",
-    "File '/node_modules/jquery.ts' does not exist.",
-    "File '/node_modules/jquery.d.ts' does not exist.",
-    "File '/node_modules/jquery/package.json' does not exist.",
-    "File '/node_modules/jquery/index.ts' does not exist.",
-    "File '/node_modules/jquery/index.d.ts' does not exist.",
-    "File '/node_modules/@types/jquery.ts' does not exist.",
-    "File '/node_modules/@types/jquery.d.ts' does not exist.",
-    "File '/node_modules/@types/jquery/package.json' does not exist.",
-    "File '/node_modules/@types/jquery/index.ts' does not exist.",
-    "File '/node_modules/@types/jquery/index.d.ts' does not exist.",
-    "======== Type reference directive 'jquery' was not resolved. ========"
+    "======== Resolving type reference directive 'jquery', containing file '/a/b/__inferred type names__.ts', root directory 'types'. ========",
+    "Resolving with primary search path 'types'",
+    "File 'types/jquery/package.json' does not exist.",
+    "File 'types/jquery/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'jquery' was successfully resolved to 'types/jquery/index.d.ts', primary: true. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/library-reference-2.trace.json b/tests/baselines/reference/library-reference-2.trace.json
index b5ef5f3e208..c26f7d2763d 100644
--- a/tests/baselines/reference/library-reference-2.trace.json
+++ b/tests/baselines/reference/library-reference-2.trace.json
@@ -1,6 +1,12 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/consumer.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'jquery', containing file '/consumer.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
+    "Found 'package.json' at '/types/jquery/package.json'.",
+    "'package.json' has 'types' field 'jquery.d.ts' that references '/types/jquery/jquery.d.ts'.",
+    "File '/types/jquery/jquery.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'jquery' was successfully resolved to '/types/jquery/jquery.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'jquery', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "Found 'package.json' at '/types/jquery/package.json'.",
     "'package.json' has 'types' field 'jquery.d.ts' that references '/types/jquery/jquery.d.ts'.",
     "File '/types/jquery/jquery.d.ts' exist - use it as a name resolution result.",
diff --git a/tests/baselines/reference/library-reference-3.trace.json b/tests/baselines/reference/library-reference-3.trace.json
index 30dbbc3fca4..909e42140c8 100644
--- a/tests/baselines/reference/library-reference-3.trace.json
+++ b/tests/baselines/reference/library-reference-3.trace.json
@@ -1,10 +1,13 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/src/consumer.ts', root directory '/src'. ========",
-    "Resolving with primary search path '/src/types/'",
-    "File '/src/types/jquery/package.json' does not exist.",
-    "File '/src/types/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path '/src/node_modules/'",
+    "======== Resolving type reference directive 'jquery', containing file '/src/consumer.ts', root directory 'node_modules/@types'. ========",
+    "Resolving with primary search path 'node_modules/@types'",
+    "File 'node_modules/@types/jquery/package.json' does not exist.",
+    "File 'node_modules/@types/jquery/index.d.ts' does not exist.",
+    "Looking up in 'node_modules' folder, initial location '/src'",
+    "File '/src/node_modules/jquery.ts' does not exist.",
+    "File '/src/node_modules/jquery.d.ts' does not exist.",
     "File '/src/node_modules/jquery/package.json' does not exist.",
+    "File '/src/node_modules/jquery/index.ts' does not exist.",
     "File '/src/node_modules/jquery/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'jquery' was successfully resolved to '/src/node_modules/jquery/index.d.ts', primary: true. ========"
+    "======== Type reference directive 'jquery' was successfully resolved to '/src/node_modules/jquery/index.d.ts', primary: false. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/library-reference-4.trace.json b/tests/baselines/reference/library-reference-4.trace.json
index 90b6eb7b01d..5df7320d322 100644
--- a/tests/baselines/reference/library-reference-4.trace.json
+++ b/tests/baselines/reference/library-reference-4.trace.json
@@ -1,14 +1,8 @@
 [
     "======== Resolving type reference directive 'foo', containing file '/src/root.ts', root directory '/src'. ========",
-    "Resolving with primary search path '/src/types/'",
-    "File '/src/types/foo/package.json' does not exist.",
-    "File '/src/types/foo/index.d.ts' does not exist.",
-    "Resolving with primary search path '/src/node_modules/'",
-    "File '/src/node_modules/foo/package.json' does not exist.",
-    "File '/src/node_modules/foo/index.d.ts' does not exist.",
-    "Resolving with primary search path '/src/node_modules/@types/'",
-    "File '/src/node_modules/@types/foo/package.json' does not exist.",
-    "File '/src/node_modules/@types/foo/index.d.ts' does not exist.",
+    "Resolving with primary search path '/src'",
+    "File '/src/foo/package.json' does not exist.",
+    "File '/src/foo/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/src'",
     "File '/src/node_modules/foo.ts' does not exist.",
     "File '/src/node_modules/foo.d.ts' does not exist.",
@@ -27,15 +21,9 @@
     "File '/node_modules/foo/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'foo' was successfully resolved to '/node_modules/foo/index.d.ts', primary: false. ========",
     "======== Resolving type reference directive 'bar', containing file '/src/root.ts', root directory '/src'. ========",
-    "Resolving with primary search path '/src/types/'",
-    "File '/src/types/bar/package.json' does not exist.",
-    "File '/src/types/bar/index.d.ts' does not exist.",
-    "Resolving with primary search path '/src/node_modules/'",
-    "File '/src/node_modules/bar/package.json' does not exist.",
-    "File '/src/node_modules/bar/index.d.ts' does not exist.",
-    "Resolving with primary search path '/src/node_modules/@types/'",
-    "File '/src/node_modules/@types/bar/package.json' does not exist.",
-    "File '/src/node_modules/@types/bar/index.d.ts' does not exist.",
+    "Resolving with primary search path '/src'",
+    "File '/src/bar/package.json' does not exist.",
+    "File '/src/bar/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/src'",
     "File '/src/node_modules/bar.ts' does not exist.",
     "File '/src/node_modules/bar.d.ts' does not exist.",
@@ -54,15 +42,9 @@
     "File '/node_modules/bar/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'bar' was successfully resolved to '/node_modules/bar/index.d.ts', primary: false. ========",
     "======== Resolving type reference directive 'alpha', containing file '/node_modules/foo/index.d.ts', root directory '/src'. ========",
-    "Resolving with primary search path '/src/types/'",
-    "File '/src/types/alpha/package.json' does not exist.",
-    "File '/src/types/alpha/index.d.ts' does not exist.",
-    "Resolving with primary search path '/src/node_modules/'",
-    "File '/src/node_modules/alpha/package.json' does not exist.",
-    "File '/src/node_modules/alpha/index.d.ts' does not exist.",
-    "Resolving with primary search path '/src/node_modules/@types/'",
-    "File '/src/node_modules/@types/alpha/package.json' does not exist.",
-    "File '/src/node_modules/@types/alpha/index.d.ts' does not exist.",
+    "Resolving with primary search path '/src'",
+    "File '/src/alpha/package.json' does not exist.",
+    "File '/src/alpha/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/node_modules/foo'",
     "File '/node_modules/foo/node_modules/alpha.ts' does not exist.",
     "File '/node_modules/foo/node_modules/alpha.d.ts' does not exist.",
@@ -71,15 +53,9 @@
     "File '/node_modules/foo/node_modules/alpha/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'alpha' was successfully resolved to '/node_modules/foo/node_modules/alpha/index.d.ts', primary: false. ========",
     "======== Resolving type reference directive 'alpha', containing file '/node_modules/bar/index.d.ts', root directory '/src'. ========",
-    "Resolving with primary search path '/src/types/'",
-    "File '/src/types/alpha/package.json' does not exist.",
-    "File '/src/types/alpha/index.d.ts' does not exist.",
-    "Resolving with primary search path '/src/node_modules/'",
-    "File '/src/node_modules/alpha/package.json' does not exist.",
-    "File '/src/node_modules/alpha/index.d.ts' does not exist.",
-    "Resolving with primary search path '/src/node_modules/@types/'",
-    "File '/src/node_modules/@types/alpha/package.json' does not exist.",
-    "File '/src/node_modules/@types/alpha/index.d.ts' does not exist.",
+    "Resolving with primary search path '/src'",
+    "File '/src/alpha/package.json' does not exist.",
+    "File '/src/alpha/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/node_modules/bar'",
     "File '/node_modules/bar/node_modules/alpha.ts' does not exist.",
     "File '/node_modules/bar/node_modules/alpha.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-5.trace.json b/tests/baselines/reference/library-reference-5.trace.json
index ad34e9e3159..9b8705f0323 100644
--- a/tests/baselines/reference/library-reference-5.trace.json
+++ b/tests/baselines/reference/library-reference-5.trace.json
@@ -1,30 +1,50 @@
 [
-    "======== Resolving type reference directive 'foo', containing file '/src/root.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/foo/package.json' does not exist.",
-    "File '/types/foo/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/'",
+    "======== Resolving type reference directive 'foo', containing file '/src/root.ts', root directory 'types'. ========",
+    "Resolving with primary search path 'types'",
+    "File 'types/foo/package.json' does not exist.",
+    "File 'types/foo/index.d.ts' does not exist.",
+    "Looking up in 'node_modules' folder, initial location '/src'",
+    "File '/src/node_modules/foo.ts' does not exist.",
+    "File '/src/node_modules/foo.d.ts' does not exist.",
+    "File '/src/node_modules/foo/package.json' does not exist.",
+    "File '/src/node_modules/foo/index.ts' does not exist.",
+    "File '/src/node_modules/foo/index.d.ts' does not exist.",
+    "File '/src/node_modules/@types/foo.ts' does not exist.",
+    "File '/src/node_modules/@types/foo.d.ts' does not exist.",
+    "File '/src/node_modules/@types/foo/package.json' does not exist.",
+    "File '/src/node_modules/@types/foo/index.ts' does not exist.",
+    "File '/src/node_modules/@types/foo/index.d.ts' does not exist.",
+    "File '/node_modules/foo.ts' does not exist.",
+    "File '/node_modules/foo.d.ts' does not exist.",
     "File '/node_modules/foo/package.json' does not exist.",
+    "File '/node_modules/foo/index.ts' does not exist.",
     "File '/node_modules/foo/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'foo' was successfully resolved to '/node_modules/foo/index.d.ts', primary: true. ========",
-    "======== Resolving type reference directive 'bar', containing file '/src/root.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/bar/package.json' does not exist.",
-    "File '/types/bar/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/'",
+    "======== Type reference directive 'foo' was successfully resolved to '/node_modules/foo/index.d.ts', primary: false. ========",
+    "======== Resolving type reference directive 'bar', containing file '/src/root.ts', root directory 'types'. ========",
+    "Resolving with primary search path 'types'",
+    "File 'types/bar/package.json' does not exist.",
+    "File 'types/bar/index.d.ts' does not exist.",
+    "Looking up in 'node_modules' folder, initial location '/src'",
+    "File '/src/node_modules/bar.ts' does not exist.",
+    "File '/src/node_modules/bar.d.ts' does not exist.",
+    "File '/src/node_modules/bar/package.json' does not exist.",
+    "File '/src/node_modules/bar/index.ts' does not exist.",
+    "File '/src/node_modules/bar/index.d.ts' does not exist.",
+    "File '/src/node_modules/@types/bar.ts' does not exist.",
+    "File '/src/node_modules/@types/bar.d.ts' does not exist.",
+    "File '/src/node_modules/@types/bar/package.json' does not exist.",
+    "File '/src/node_modules/@types/bar/index.ts' does not exist.",
+    "File '/src/node_modules/@types/bar/index.d.ts' does not exist.",
+    "File '/node_modules/bar.ts' does not exist.",
+    "File '/node_modules/bar.d.ts' does not exist.",
     "File '/node_modules/bar/package.json' does not exist.",
+    "File '/node_modules/bar/index.ts' does not exist.",
     "File '/node_modules/bar/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'bar' was successfully resolved to '/node_modules/bar/index.d.ts', primary: true. ========",
-    "======== Resolving type reference directive 'alpha', containing file '/node_modules/foo/index.d.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/alpha/package.json' does not exist.",
-    "File '/types/alpha/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/'",
-    "File '/node_modules/alpha/package.json' does not exist.",
-    "File '/node_modules/alpha/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/@types/'",
-    "File '/node_modules/@types/alpha/package.json' does not exist.",
-    "File '/node_modules/@types/alpha/index.d.ts' does not exist.",
+    "======== Type reference directive 'bar' was successfully resolved to '/node_modules/bar/index.d.ts', primary: false. ========",
+    "======== Resolving type reference directive 'alpha', containing file '/node_modules/foo/index.d.ts', root directory 'types'. ========",
+    "Resolving with primary search path 'types'",
+    "File 'types/alpha/package.json' does not exist.",
+    "File 'types/alpha/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/node_modules/foo'",
     "File '/node_modules/foo/node_modules/alpha.ts' does not exist.",
     "File '/node_modules/foo/node_modules/alpha.d.ts' does not exist.",
@@ -32,16 +52,10 @@
     "File '/node_modules/foo/node_modules/alpha/index.ts' does not exist.",
     "File '/node_modules/foo/node_modules/alpha/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'alpha' was successfully resolved to '/node_modules/foo/node_modules/alpha/index.d.ts', primary: false. ========",
-    "======== Resolving type reference directive 'alpha', containing file '/node_modules/bar/index.d.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/alpha/package.json' does not exist.",
-    "File '/types/alpha/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/'",
-    "File '/node_modules/alpha/package.json' does not exist.",
-    "File '/node_modules/alpha/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/@types/'",
-    "File '/node_modules/@types/alpha/package.json' does not exist.",
-    "File '/node_modules/@types/alpha/index.d.ts' does not exist.",
+    "======== Resolving type reference directive 'alpha', containing file '/node_modules/bar/index.d.ts', root directory 'types'. ========",
+    "Resolving with primary search path 'types'",
+    "File 'types/alpha/package.json' does not exist.",
+    "File 'types/alpha/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/node_modules/bar'",
     "File '/node_modules/bar/node_modules/alpha.ts' does not exist.",
     "File '/node_modules/bar/node_modules/alpha.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-6.symbols b/tests/baselines/reference/library-reference-6.symbols
deleted file mode 100644
index 328842f804c..00000000000
--- a/tests/baselines/reference/library-reference-6.symbols
+++ /dev/null
@@ -1,16 +0,0 @@
-=== /src/foo.ts ===
-/// <reference types="alpha" />
-var x: string = alpha.a;
->x : Symbol(x, Decl(foo.ts, 1, 3))
->alpha.a : Symbol(a, Decl(index.d.ts, 3, 20))
->alpha : Symbol(alpha, Decl(index.d.ts, 3, 11))
->a : Symbol(a, Decl(index.d.ts, 3, 20))
-
-=== /types/alpha/index.d.ts ===
-
-// The primary lookup folder is relative to tsconfig.json, if present
-
-declare var alpha: { a: string };
->alpha : Symbol(alpha, Decl(index.d.ts, 3, 11))
->a : Symbol(a, Decl(index.d.ts, 3, 20))
-
diff --git a/tests/baselines/reference/library-reference-6.trace.json b/tests/baselines/reference/library-reference-6.trace.json
index 426214fdcfc..fc29f3f2478 100644
--- a/tests/baselines/reference/library-reference-6.trace.json
+++ b/tests/baselines/reference/library-reference-6.trace.json
@@ -1,7 +1,28 @@
 [
-    "======== Resolving type reference directive 'alpha', containing file '/src/foo.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/alpha/package.json' does not exist.",
-    "File '/types/alpha/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'alpha' was successfully resolved to '/types/alpha/index.d.ts', primary: true. ========"
+    "======== Resolving type reference directive 'alpha', containing file '/src/foo.ts', root directory 'node_modules/@types'. ========",
+    "Resolving with primary search path 'node_modules/@types'",
+    "File 'node_modules/@types/alpha/package.json' does not exist.",
+    "File 'node_modules/@types/alpha/index.d.ts' does not exist.",
+    "Looking up in 'node_modules' folder, initial location '/src'",
+    "File '/src/node_modules/alpha.ts' does not exist.",
+    "File '/src/node_modules/alpha.d.ts' does not exist.",
+    "File '/src/node_modules/alpha/package.json' does not exist.",
+    "File '/src/node_modules/alpha/index.ts' does not exist.",
+    "File '/src/node_modules/alpha/index.d.ts' does not exist.",
+    "File '/src/node_modules/@types/alpha.ts' does not exist.",
+    "File '/src/node_modules/@types/alpha.d.ts' does not exist.",
+    "File '/src/node_modules/@types/alpha/package.json' does not exist.",
+    "File '/src/node_modules/@types/alpha/index.ts' does not exist.",
+    "File '/src/node_modules/@types/alpha/index.d.ts' does not exist.",
+    "File '/node_modules/alpha.ts' does not exist.",
+    "File '/node_modules/alpha.d.ts' does not exist.",
+    "File '/node_modules/alpha/package.json' does not exist.",
+    "File '/node_modules/alpha/index.ts' does not exist.",
+    "File '/node_modules/alpha/index.d.ts' does not exist.",
+    "File '/node_modules/@types/alpha.ts' does not exist.",
+    "File '/node_modules/@types/alpha.d.ts' does not exist.",
+    "File '/node_modules/@types/alpha/package.json' does not exist.",
+    "File '/node_modules/@types/alpha/index.ts' does not exist.",
+    "File '/node_modules/@types/alpha/index.d.ts' does not exist.",
+    "======== Type reference directive 'alpha' was not resolved. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/library-reference-6.types b/tests/baselines/reference/library-reference-6.types
deleted file mode 100644
index 2f6c1e49b89..00000000000
--- a/tests/baselines/reference/library-reference-6.types
+++ /dev/null
@@ -1,16 +0,0 @@
-=== /src/foo.ts ===
-/// <reference types="alpha" />
-var x: string = alpha.a;
->x : string
->alpha.a : string
->alpha : { a: string; }
->a : string
-
-=== /types/alpha/index.d.ts ===
-
-// The primary lookup folder is relative to tsconfig.json, if present
-
-declare var alpha: { a: string };
->alpha : { a: string; }
->a : string
-
diff --git a/tests/baselines/reference/library-reference-7.trace.json b/tests/baselines/reference/library-reference-7.trace.json
index 9c6b19390d0..909e42140c8 100644
--- a/tests/baselines/reference/library-reference-7.trace.json
+++ b/tests/baselines/reference/library-reference-7.trace.json
@@ -1,14 +1,8 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/src/consumer.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/jquery/package.json' does not exist.",
-    "File '/types/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/'",
-    "File '/node_modules/jquery/package.json' does not exist.",
-    "File '/node_modules/jquery/index.d.ts' does not exist.",
-    "Resolving with primary search path '/node_modules/@types/'",
-    "File '/node_modules/@types/jquery/package.json' does not exist.",
-    "File '/node_modules/@types/jquery/index.d.ts' does not exist.",
+    "======== Resolving type reference directive 'jquery', containing file '/src/consumer.ts', root directory 'node_modules/@types'. ========",
+    "Resolving with primary search path 'node_modules/@types'",
+    "File 'node_modules/@types/jquery/package.json' does not exist.",
+    "File 'node_modules/@types/jquery/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/src'",
     "File '/src/node_modules/jquery.ts' does not exist.",
     "File '/src/node_modules/jquery.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-8.symbols b/tests/baselines/reference/library-reference-8.symbols
index 299a60f1b1d..a6a24689f3f 100644
--- a/tests/baselines/reference/library-reference-8.symbols
+++ b/tests/baselines/reference/library-reference-8.symbols
@@ -1,4 +1,4 @@
-=== /foo.ts ===
+=== /test/foo.ts ===
 /// <reference types="alpha" />
 /// <reference types="beta" />
 var x: string = alpha.a + beta.b;
@@ -11,7 +11,7 @@ var x: string = alpha.a + beta.b;
 >b : Symbol(b, Decl(index.d.ts, 1, 19))
 
 
-=== /types/alpha/index.d.ts ===
+=== /test/types/alpha/index.d.ts ===
 
 // Don't crash in circular library reference situations
 
@@ -20,7 +20,7 @@ declare var alpha: { a: string };
 >alpha : Symbol(alpha, Decl(index.d.ts, 4, 11))
 >a : Symbol(a, Decl(index.d.ts, 4, 20))
 
-=== /types/beta/index.d.ts ===
+=== /test/types/beta/index.d.ts ===
 /// <reference types="alpha" />
 declare var beta: { b: string };
 >beta : Symbol(beta, Decl(index.d.ts, 1, 11))
diff --git a/tests/baselines/reference/library-reference-8.trace.json b/tests/baselines/reference/library-reference-8.trace.json
index b1dc6478688..d34f206e581 100644
--- a/tests/baselines/reference/library-reference-8.trace.json
+++ b/tests/baselines/reference/library-reference-8.trace.json
@@ -1,22 +1,32 @@
 [
-    "======== Resolving type reference directive 'alpha', containing file '/foo.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/alpha/package.json' does not exist.",
-    "File '/types/alpha/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'alpha' was successfully resolved to '/types/alpha/index.d.ts', primary: true. ========",
-    "======== Resolving type reference directive 'beta', containing file '/foo.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/beta/package.json' does not exist.",
-    "File '/types/beta/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'beta' was successfully resolved to '/types/beta/index.d.ts', primary: true. ========",
-    "======== Resolving type reference directive 'beta', containing file '/types/alpha/index.d.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/beta/package.json' does not exist.",
-    "File '/types/beta/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'beta' was successfully resolved to '/types/beta/index.d.ts', primary: true. ========",
-    "======== Resolving type reference directive 'alpha', containing file '/types/beta/index.d.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
-    "File '/types/alpha/package.json' does not exist.",
-    "File '/types/alpha/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'alpha' was successfully resolved to '/types/alpha/index.d.ts', primary: true. ========"
+    "======== Resolving type reference directive 'alpha', containing file '/test/foo.ts', root directory '/test/types'. ========",
+    "Resolving with primary search path '/test/types'",
+    "File '/test/types/alpha/package.json' does not exist.",
+    "File '/test/types/alpha/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'alpha' was successfully resolved to '/test/types/alpha/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'beta', containing file '/test/foo.ts', root directory '/test/types'. ========",
+    "Resolving with primary search path '/test/types'",
+    "File '/test/types/beta/package.json' does not exist.",
+    "File '/test/types/beta/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'beta' was successfully resolved to '/test/types/beta/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'beta', containing file '/test/types/alpha/index.d.ts', root directory '/test/types'. ========",
+    "Resolving with primary search path '/test/types'",
+    "File '/test/types/beta/package.json' does not exist.",
+    "File '/test/types/beta/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'beta' was successfully resolved to '/test/types/beta/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'alpha', containing file '/test/types/beta/index.d.ts', root directory '/test/types'. ========",
+    "Resolving with primary search path '/test/types'",
+    "File '/test/types/alpha/package.json' does not exist.",
+    "File '/test/types/alpha/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'alpha' was successfully resolved to '/test/types/alpha/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'alpha', containing file '/test/__inferred type names__.ts', root directory '/test/types'. ========",
+    "Resolving with primary search path '/test/types'",
+    "File '/test/types/alpha/package.json' does not exist.",
+    "File '/test/types/alpha/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'alpha' was successfully resolved to '/test/types/alpha/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'beta', containing file '/test/__inferred type names__.ts', root directory '/test/types'. ========",
+    "Resolving with primary search path '/test/types'",
+    "File '/test/types/beta/package.json' does not exist.",
+    "File '/test/types/beta/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'beta' was successfully resolved to '/test/types/beta/index.d.ts', primary: true. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/library-reference-8.types b/tests/baselines/reference/library-reference-8.types
index b0780d90f63..d8a2b6e9638 100644
--- a/tests/baselines/reference/library-reference-8.types
+++ b/tests/baselines/reference/library-reference-8.types
@@ -1,4 +1,4 @@
-=== /foo.ts ===
+=== /test/foo.ts ===
 /// <reference types="alpha" />
 /// <reference types="beta" />
 var x: string = alpha.a + beta.b;
@@ -12,7 +12,7 @@ var x: string = alpha.a + beta.b;
 >b : string
 
 
-=== /types/alpha/index.d.ts ===
+=== /test/types/alpha/index.d.ts ===
 
 // Don't crash in circular library reference situations
 
@@ -21,7 +21,7 @@ declare var alpha: { a: string };
 >alpha : { a: string; }
 >a : string
 
-=== /types/beta/index.d.ts ===
+=== /test/types/beta/index.d.ts ===
 /// <reference types="alpha" />
 declare var beta: { b: string };
 >beta : { b: string; }
diff --git a/tests/baselines/reference/library-reference-9.js b/tests/baselines/reference/library-reference-9.js
deleted file mode 100644
index ccb3b3213a9..00000000000
--- a/tests/baselines/reference/library-reference-9.js
+++ /dev/null
@@ -1,16 +0,0 @@
-//// [tests/cases/conformance/references/library-reference-9.ts] ////
-
-//// [index.d.ts]
-
-// Use types search path
-
-declare var alpha: { a: string };
-
-//// [foo.ts]
-/// <reference types="alpha" />
-var x: string = alpha.a;
-
-
-//// [foo.js]
-/// <reference types="alpha" />
-var x = alpha.a;
diff --git a/tests/baselines/reference/library-reference-9.symbols b/tests/baselines/reference/library-reference-9.symbols
deleted file mode 100644
index 62cde2117df..00000000000
--- a/tests/baselines/reference/library-reference-9.symbols
+++ /dev/null
@@ -1,16 +0,0 @@
-=== /base/src/foo.ts ===
-/// <reference types="alpha" />
-var x: string = alpha.a;
->x : Symbol(x, Decl(foo.ts, 1, 3))
->alpha.a : Symbol(a, Decl(index.d.ts, 3, 20))
->alpha : Symbol(alpha, Decl(index.d.ts, 3, 11))
->a : Symbol(a, Decl(index.d.ts, 3, 20))
-
-=== /share/typelib/alpha/index.d.ts ===
-
-// Use types search path
-
-declare var alpha: { a: string };
->alpha : Symbol(alpha, Decl(index.d.ts, 3, 11))
->a : Symbol(a, Decl(index.d.ts, 3, 20))
-
diff --git a/tests/baselines/reference/library-reference-9.trace.json b/tests/baselines/reference/library-reference-9.trace.json
deleted file mode 100644
index e2fdfdc0550..00000000000
--- a/tests/baselines/reference/library-reference-9.trace.json
+++ /dev/null
@@ -1,7 +0,0 @@
-[
-    "======== Resolving type reference directive 'alpha', containing file '/base/src/foo.ts', root directory '/'. ========",
-    "Resolving with primary search path '/share/typelib'",
-    "File '/share/typelib/alpha/package.json' does not exist.",
-    "File '/share/typelib/alpha/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'alpha' was successfully resolved to '/share/typelib/alpha/index.d.ts', primary: true. ========"
-]
\ No newline at end of file
diff --git a/tests/baselines/reference/library-reference-9.types b/tests/baselines/reference/library-reference-9.types
deleted file mode 100644
index 8df2179e249..00000000000
--- a/tests/baselines/reference/library-reference-9.types
+++ /dev/null
@@ -1,16 +0,0 @@
-=== /base/src/foo.ts ===
-/// <reference types="alpha" />
-var x: string = alpha.a;
->x : string
->alpha.a : string
->alpha : { a: string; }
->a : string
-
-=== /share/typelib/alpha/index.d.ts ===
-
-// Use types search path
-
-declare var alpha: { a: string };
->alpha : { a: string; }
->a : string
-
diff --git a/tests/baselines/reference/moduleResolutionWithSymlinks.errors.txt b/tests/baselines/reference/moduleResolutionWithSymlinks.errors.txt
new file mode 100644
index 00000000000..b51933902a4
--- /dev/null
+++ b/tests/baselines/reference/moduleResolutionWithSymlinks.errors.txt
@@ -0,0 +1,21 @@
+/src/library-b/index.ts(1,23): error TS2307: Cannot find module 'library-a'.
+
+
+==== /src/app.ts (0 errors) ====
+    import { MyClass } from "./library-a";
+    import { MyClass2 } from "./library-b";
+    
+    let x: MyClass;
+    let y: MyClass2;
+    x = y;
+    y = x;
+==== /src/library-a/index.ts (0 errors) ====
+    
+    export class MyClass{}
+    
+==== /src/library-b/index.ts (1 errors) ====
+    import {MyClass} from "library-a";
+                          ~~~~~~~~~~~
+!!! error TS2307: Cannot find module 'library-a'.
+    export { MyClass as MyClass2 }
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/moduleResolutionWithSymlinks.symbols b/tests/baselines/reference/moduleResolutionWithSymlinks.symbols
deleted file mode 100644
index ea73755deef..00000000000
--- a/tests/baselines/reference/moduleResolutionWithSymlinks.symbols
+++ /dev/null
@@ -1,36 +0,0 @@
-=== /src/app.ts ===
-import { MyClass } from "./library-a";
->MyClass : Symbol(MyClass, Decl(app.ts, 0, 8))
-
-import { MyClass2 } from "./library-b";
->MyClass2 : Symbol(MyClass2, Decl(app.ts, 1, 8))
-
-let x: MyClass;
->x : Symbol(x, Decl(app.ts, 3, 3))
->MyClass : Symbol(MyClass, Decl(app.ts, 0, 8))
-
-let y: MyClass2;
->y : Symbol(y, Decl(app.ts, 4, 3))
->MyClass2 : Symbol(MyClass2, Decl(app.ts, 1, 8))
-
-x = y;
->x : Symbol(x, Decl(app.ts, 3, 3))
->y : Symbol(y, Decl(app.ts, 4, 3))
-
-y = x;
->y : Symbol(y, Decl(app.ts, 4, 3))
->x : Symbol(x, Decl(app.ts, 3, 3))
-
-=== /src/library-a/index.ts ===
-
-export class MyClass{}
->MyClass : Symbol(MyClass, Decl(index.ts, 0, 0))
-
-=== /src/library-b/index.ts ===
-import {MyClass} from "library-a";
->MyClass : Symbol(MyClass, Decl(index.ts, 0, 8))
-
-export { MyClass as MyClass2 }
->MyClass : Symbol(MyClass2, Decl(index.ts, 1, 8))
->MyClass2 : Symbol(MyClass2, Decl(index.ts, 1, 8))
-
diff --git a/tests/baselines/reference/moduleResolutionWithSymlinks.trace.json b/tests/baselines/reference/moduleResolutionWithSymlinks.trace.json
index 7f1c2890180..f3bfae4b173 100644
--- a/tests/baselines/reference/moduleResolutionWithSymlinks.trace.json
+++ b/tests/baselines/reference/moduleResolutionWithSymlinks.trace.json
@@ -26,7 +26,43 @@
     "File '/src/library-b/node_modules/library-a.tsx' does not exist.",
     "File '/src/library-b/node_modules/library-a.d.ts' does not exist.",
     "File '/src/library-b/node_modules/library-a/package.json' does not exist.",
-    "File '/src/library-b/node_modules/library-a/index.ts' exist - use it as a name resolution result.",
-    "Resolving real path for '/src/library-b/node_modules/library-a/index.ts', result '/src/library-a/index.ts'",
-    "======== Module name 'library-a' was successfully resolved to '/src/library-a/index.ts'. ========"
+    "File '/src/library-b/node_modules/library-a/index.ts' does not exist.",
+    "File '/src/library-b/node_modules/library-a/index.tsx' does not exist.",
+    "File '/src/library-b/node_modules/library-a/index.d.ts' does not exist.",
+    "File '/src/library-b/node_modules/@types/library-a.ts' does not exist.",
+    "File '/src/library-b/node_modules/@types/library-a.tsx' does not exist.",
+    "File '/src/library-b/node_modules/@types/library-a.d.ts' does not exist.",
+    "File '/src/library-b/node_modules/@types/library-a/package.json' does not exist.",
+    "File '/src/library-b/node_modules/@types/library-a/index.ts' does not exist.",
+    "File '/src/library-b/node_modules/@types/library-a/index.tsx' does not exist.",
+    "File '/src/library-b/node_modules/@types/library-a/index.d.ts' does not exist.",
+    "File '/src/node_modules/library-a.ts' does not exist.",
+    "File '/src/node_modules/library-a.tsx' does not exist.",
+    "File '/src/node_modules/library-a.d.ts' does not exist.",
+    "File '/src/node_modules/library-a/package.json' does not exist.",
+    "File '/src/node_modules/library-a/index.ts' does not exist.",
+    "File '/src/node_modules/library-a/index.tsx' does not exist.",
+    "File '/src/node_modules/library-a/index.d.ts' does not exist.",
+    "File '/src/node_modules/@types/library-a.ts' does not exist.",
+    "File '/src/node_modules/@types/library-a.tsx' does not exist.",
+    "File '/src/node_modules/@types/library-a.d.ts' does not exist.",
+    "File '/src/node_modules/@types/library-a/package.json' does not exist.",
+    "File '/src/node_modules/@types/library-a/index.ts' does not exist.",
+    "File '/src/node_modules/@types/library-a/index.tsx' does not exist.",
+    "File '/src/node_modules/@types/library-a/index.d.ts' does not exist.",
+    "File '/node_modules/library-a.ts' does not exist.",
+    "File '/node_modules/library-a.tsx' does not exist.",
+    "File '/node_modules/library-a.d.ts' does not exist.",
+    "File '/node_modules/library-a/package.json' does not exist.",
+    "File '/node_modules/library-a/index.ts' does not exist.",
+    "File '/node_modules/library-a/index.tsx' does not exist.",
+    "File '/node_modules/library-a/index.d.ts' does not exist.",
+    "File '/node_modules/@types/library-a.ts' does not exist.",
+    "File '/node_modules/@types/library-a.tsx' does not exist.",
+    "File '/node_modules/@types/library-a.d.ts' does not exist.",
+    "File '/node_modules/@types/library-a/package.json' does not exist.",
+    "File '/node_modules/@types/library-a/index.ts' does not exist.",
+    "File '/node_modules/@types/library-a/index.tsx' does not exist.",
+    "File '/node_modules/@types/library-a/index.d.ts' does not exist.",
+    "======== Module name 'library-a' was not resolved. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/moduleResolutionWithSymlinks.types b/tests/baselines/reference/moduleResolutionWithSymlinks.types
deleted file mode 100644
index 8344adbe817..00000000000
--- a/tests/baselines/reference/moduleResolutionWithSymlinks.types
+++ /dev/null
@@ -1,38 +0,0 @@
-=== /src/app.ts ===
-import { MyClass } from "./library-a";
->MyClass : typeof MyClass
-
-import { MyClass2 } from "./library-b";
->MyClass2 : typeof MyClass
-
-let x: MyClass;
->x : MyClass
->MyClass : MyClass
-
-let y: MyClass2;
->y : MyClass
->MyClass2 : MyClass
-
-x = y;
->x = y : MyClass
->x : MyClass
->y : MyClass
-
-y = x;
->y = x : MyClass
->y : MyClass
->x : MyClass
-
-=== /src/library-a/index.ts ===
-
-export class MyClass{}
->MyClass : MyClass
-
-=== /src/library-b/index.ts ===
-import {MyClass} from "library-a";
->MyClass : typeof MyClass
-
-export { MyClass as MyClass2 }
->MyClass : typeof MyClass
->MyClass2 : typeof MyClass
-
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution3_node.trace.json b/tests/baselines/reference/pathMappingBasedModuleResolution3_node.trace.json
index af5e20a3cc3..ab7210d7d02 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution3_node.trace.json
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution3_node.trace.json
@@ -5,11 +5,13 @@
     "Resolving module name 'folder2/file2' relative to base url 'c:/root' - 'c:/root/folder2/file2'.",
     "Loading module as file / folder, candidate module location 'c:/root/folder2/file2'.",
     "File 'c:/root/folder2/file2.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/root/folder2/file2.ts', result 'c:/root/folder2/file2.ts'",
     "======== Module name 'folder2/file2' was successfully resolved to 'c:/root/folder2/file2.ts'. ========",
     "======== Resolving module './file3' from 'c:/root/folder2/file2.ts'. ========",
     "Explicitly specified module resolution kind: 'NodeJs'.",
     "Loading module as file / folder, candidate module location 'c:/root/folder2/file3'.",
     "File 'c:/root/folder2/file3.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/root/folder2/file3.ts', result 'c:/root/folder2/file3.ts'",
     "======== Module name './file3' was successfully resolved to 'c:/root/folder2/file3.ts'. ========",
     "======== Resolving module 'file4' from 'c:/root/folder2/file2.ts'. ========",
     "Explicitly specified module resolution kind: 'NodeJs'.",
@@ -59,5 +61,6 @@
     "File 'c:/node_modules/file4/index.ts' does not exist.",
     "File 'c:/node_modules/file4/index.tsx' does not exist.",
     "File 'c:/node_modules/file4/index.d.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/node_modules/file4/index.d.ts', result 'c:/node_modules/file4/index.d.ts'",
     "======== Module name 'file4' was successfully resolved to 'c:/node_modules/file4/index.d.ts'. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution4_node.trace.json b/tests/baselines/reference/pathMappingBasedModuleResolution4_node.trace.json
index af5e20a3cc3..ab7210d7d02 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution4_node.trace.json
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution4_node.trace.json
@@ -5,11 +5,13 @@
     "Resolving module name 'folder2/file2' relative to base url 'c:/root' - 'c:/root/folder2/file2'.",
     "Loading module as file / folder, candidate module location 'c:/root/folder2/file2'.",
     "File 'c:/root/folder2/file2.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/root/folder2/file2.ts', result 'c:/root/folder2/file2.ts'",
     "======== Module name 'folder2/file2' was successfully resolved to 'c:/root/folder2/file2.ts'. ========",
     "======== Resolving module './file3' from 'c:/root/folder2/file2.ts'. ========",
     "Explicitly specified module resolution kind: 'NodeJs'.",
     "Loading module as file / folder, candidate module location 'c:/root/folder2/file3'.",
     "File 'c:/root/folder2/file3.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/root/folder2/file3.ts', result 'c:/root/folder2/file3.ts'",
     "======== Module name './file3' was successfully resolved to 'c:/root/folder2/file3.ts'. ========",
     "======== Resolving module 'file4' from 'c:/root/folder2/file2.ts'. ========",
     "Explicitly specified module resolution kind: 'NodeJs'.",
@@ -59,5 +61,6 @@
     "File 'c:/node_modules/file4/index.ts' does not exist.",
     "File 'c:/node_modules/file4/index.tsx' does not exist.",
     "File 'c:/node_modules/file4/index.d.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/node_modules/file4/index.d.ts', result 'c:/node_modules/file4/index.d.ts'",
     "======== Module name 'file4' was successfully resolved to 'c:/node_modules/file4/index.d.ts'. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution5_node.trace.json b/tests/baselines/reference/pathMappingBasedModuleResolution5_node.trace.json
index cebd59f01b4..2efeefa24e5 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution5_node.trace.json
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution5_node.trace.json
@@ -7,6 +7,7 @@
     "Trying substitution '*', candidate module location: 'folder2/file1'.",
     "Loading module as file / folder, candidate module location 'c:/root/folder2/file1'.",
     "File 'c:/root/folder2/file1.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/root/folder2/file1.ts', result 'c:/root/folder2/file1.ts'",
     "======== Module name 'folder2/file1' was successfully resolved to 'c:/root/folder2/file1.ts'. ========",
     "======== Resolving module 'folder3/file2' from 'c:/root/folder1/file1.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
@@ -25,6 +26,7 @@
     "Trying substitution 'generated/*', candidate module location: 'generated/folder3/file2'.",
     "Loading module as file / folder, candidate module location 'c:/root/generated/folder3/file2'.",
     "File 'c:/root/generated/folder3/file2.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/root/generated/folder3/file2.ts', result 'c:/root/generated/folder3/file2.ts'",
     "======== Module name 'folder3/file2' was successfully resolved to 'c:/root/generated/folder3/file2.ts'. ========",
     "======== Resolving module 'components/file3' from 'c:/root/folder1/file1.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
@@ -40,6 +42,7 @@
     "File 'c:/root/shared/components/file3/index.ts' does not exist.",
     "File 'c:/root/shared/components/file3/index.tsx' does not exist.",
     "File 'c:/root/shared/components/file3/index.d.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/root/shared/components/file3/index.d.ts', result 'c:/root/shared/components/file3/index.d.ts'",
     "======== Module name 'components/file3' was successfully resolved to 'c:/root/shared/components/file3/index.d.ts'. ========",
     "======== Resolving module 'file4' from 'c:/root/folder1/file1.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
@@ -94,5 +97,6 @@
     "File 'c:/root/node_modules/@types/file4/index.tsx' does not exist.",
     "File 'c:/root/node_modules/@types/file4/index.d.ts' does not exist.",
     "File 'c:/node_modules/file4.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/node_modules/file4.ts', result 'c:/node_modules/file4.ts'",
     "======== Module name 'file4' was successfully resolved to 'c:/node_modules/file4.ts'. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution6_node.trace.json b/tests/baselines/reference/pathMappingBasedModuleResolution6_node.trace.json
index 7c5e76a2847..28e51a11915 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution6_node.trace.json
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution6_node.trace.json
@@ -18,6 +18,7 @@
     "Loading 'project/file3' from the root dir 'c:/root/generated/src', candidate location 'c:/root/generated/src/project/file3'",
     "Loading module as file / folder, candidate module location 'c:/root/generated/src/project/file3'.",
     "File 'c:/root/generated/src/project/file3.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/root/generated/src/project/file3.ts', result 'c:/root/generated/src/project/file3.ts'",
     "======== Module name './project/file3' was successfully resolved to 'c:/root/generated/src/project/file3.ts'. ========",
     "======== Resolving module '../file2' from 'c:/root/generated/src/project/file3.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
@@ -44,5 +45,6 @@
     "File 'c:/root/src/file2/index.ts' does not exist.",
     "File 'c:/root/src/file2/index.tsx' does not exist.",
     "File 'c:/root/src/file2/index.d.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/root/src/file2/index.d.ts', result 'c:/root/src/file2/index.d.ts'",
     "======== Module name '../file2' was successfully resolved to 'c:/root/src/file2/index.d.ts'. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/pathMappingBasedModuleResolution7_node.trace.json b/tests/baselines/reference/pathMappingBasedModuleResolution7_node.trace.json
index 99d4bf244db..6be7d349fed 100644
--- a/tests/baselines/reference/pathMappingBasedModuleResolution7_node.trace.json
+++ b/tests/baselines/reference/pathMappingBasedModuleResolution7_node.trace.json
@@ -18,6 +18,7 @@
     "Loading 'project/file2' from the root dir 'c:/root/generated/src', candidate location 'c:/root/generated/src/project/file2'",
     "Loading module as file / folder, candidate module location 'c:/root/generated/src/project/file2'.",
     "File 'c:/root/generated/src/project/file2.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/root/generated/src/project/file2.ts', result 'c:/root/generated/src/project/file2.ts'",
     "======== Module name './project/file2' was successfully resolved to 'c:/root/generated/src/project/file2.ts'. ========",
     "======== Resolving module 'module3' from 'c:/root/src/file1.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
@@ -74,6 +75,7 @@
     "File 'c:/node_modules/module3.ts' does not exist.",
     "File 'c:/node_modules/module3.tsx' does not exist.",
     "File 'c:/node_modules/module3.d.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/node_modules/module3.d.ts', result 'c:/node_modules/module3.d.ts'",
     "======== Module name 'module3' was successfully resolved to 'c:/node_modules/module3.d.ts'. ========",
     "======== Resolving module 'module1' from 'c:/root/generated/src/project/file2.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
@@ -98,6 +100,7 @@
     "File 'c:/shared/module1/index.ts' does not exist.",
     "File 'c:/shared/module1/index.tsx' does not exist.",
     "File 'c:/shared/module1/index.d.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/shared/module1/index.d.ts', result 'c:/shared/module1/index.d.ts'",
     "======== Module name 'module1' was successfully resolved to 'c:/shared/module1/index.d.ts'. ========",
     "======== Resolving module 'templates/module2' from 'c:/root/generated/src/project/file2.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
@@ -107,6 +110,7 @@
     "Trying substitution 'generated/src/templates/*', candidate module location: 'generated/src/templates/module2'.",
     "Loading module as file / folder, candidate module location 'c:/root/generated/src/templates/module2'.",
     "File 'c:/root/generated/src/templates/module2.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/root/generated/src/templates/module2.ts', result 'c:/root/generated/src/templates/module2.ts'",
     "======== Module name 'templates/module2' was successfully resolved to 'c:/root/generated/src/templates/module2.ts'. ========",
     "======== Resolving module '../file3' from 'c:/root/generated/src/project/file2.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
@@ -133,5 +137,6 @@
     "File 'c:/root/src/file3/index.ts' does not exist.",
     "File 'c:/root/src/file3/index.tsx' does not exist.",
     "File 'c:/root/src/file3/index.d.ts' exist - use it as a name resolution result.",
+    "Resolving real path for 'c:/root/src/file3/index.d.ts', result 'c:/root/src/file3/index.d.ts'",
     "======== Module name '../file3' was successfully resolved to 'c:/root/src/file3/index.d.ts'. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/typeReferenceDirectives1.trace.json b/tests/baselines/reference/typeReferenceDirectives1.trace.json
index c936a84dcc0..58b23783b0b 100644
--- a/tests/baselines/reference/typeReferenceDirectives1.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives1.trace.json
@@ -1,6 +1,11 @@
 [
-    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
+    "File '/types/lib/package.json' does not exist.",
+    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'lib', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "File '/types/lib/package.json' does not exist.",
     "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
diff --git a/tests/baselines/reference/typeReferenceDirectives10.trace.json b/tests/baselines/reference/typeReferenceDirectives10.trace.json
index b6adaf1f513..61341afdab3 100644
--- a/tests/baselines/reference/typeReferenceDirectives10.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives10.trace.json
@@ -1,6 +1,6 @@
 [
-    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "File '/types/lib/package.json' does not exist.",
     "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========",
@@ -10,5 +10,11 @@
     "File '/ref.ts' does not exist.",
     "File '/ref.tsx' does not exist.",
     "File '/ref.d.ts' exist - use it as a name resolution result.",
-    "======== Module name './ref' was successfully resolved to '/ref.d.ts'. ========"
+    "Resolving real path for '/ref.d.ts', result '/ref.d.ts'",
+    "======== Module name './ref' was successfully resolved to '/ref.d.ts'. ========",
+    "======== Resolving type reference directive 'lib', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
+    "File '/types/lib/package.json' does not exist.",
+    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/typeReferenceDirectives11.trace.json b/tests/baselines/reference/typeReferenceDirectives11.trace.json
index bfaae056c9e..37fa7900a7c 100644
--- a/tests/baselines/reference/typeReferenceDirectives11.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives11.trace.json
@@ -3,9 +3,10 @@
     "Module resolution kind is not specified, using 'NodeJs'.",
     "Loading module as file / folder, candidate module location '/mod1'.",
     "File '/mod1.ts' exist - use it as a name resolution result.",
+    "Resolving real path for '/mod1.ts', result '/mod1.ts'",
     "======== Module name './mod1' was successfully resolved to '/mod1.ts'. ========",
-    "======== Resolving type reference directive 'lib', containing file not set, root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'lib', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "File '/types/lib/package.json' does not exist.",
     "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
diff --git a/tests/baselines/reference/typeReferenceDirectives12.trace.json b/tests/baselines/reference/typeReferenceDirectives12.trace.json
index f4fc0937325..1024b0cdef3 100644
--- a/tests/baselines/reference/typeReferenceDirectives12.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives12.trace.json
@@ -3,14 +3,16 @@
     "Module resolution kind is not specified, using 'NodeJs'.",
     "Loading module as file / folder, candidate module location '/main'.",
     "File '/main.ts' exist - use it as a name resolution result.",
+    "Resolving real path for '/main.ts', result '/main.ts'",
     "======== Module name './main' was successfully resolved to '/main.ts'. ========",
     "======== Resolving module './mod1' from '/mod2.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
     "Loading module as file / folder, candidate module location '/mod1'.",
     "File '/mod1.ts' exist - use it as a name resolution result.",
+    "Resolving real path for '/mod1.ts', result '/mod1.ts'",
     "======== Module name './mod1' was successfully resolved to '/mod1.ts'. ========",
-    "======== Resolving type reference directive 'lib', containing file '/mod1.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'lib', containing file '/mod1.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "File '/types/lib/package.json' does not exist.",
     "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========",
@@ -18,5 +20,11 @@
     "Module resolution kind is not specified, using 'NodeJs'.",
     "Loading module as file / folder, candidate module location '/main'.",
     "File '/main.ts' exist - use it as a name resolution result.",
-    "======== Module name './main' was successfully resolved to '/main.ts'. ========"
+    "Resolving real path for '/main.ts', result '/main.ts'",
+    "======== Module name './main' was successfully resolved to '/main.ts'. ========",
+    "======== Resolving type reference directive 'lib', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
+    "File '/types/lib/package.json' does not exist.",
+    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/typeReferenceDirectives13.trace.json b/tests/baselines/reference/typeReferenceDirectives13.trace.json
index b6adaf1f513..61341afdab3 100644
--- a/tests/baselines/reference/typeReferenceDirectives13.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives13.trace.json
@@ -1,6 +1,6 @@
 [
-    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "File '/types/lib/package.json' does not exist.",
     "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========",
@@ -10,5 +10,11 @@
     "File '/ref.ts' does not exist.",
     "File '/ref.tsx' does not exist.",
     "File '/ref.d.ts' exist - use it as a name resolution result.",
-    "======== Module name './ref' was successfully resolved to '/ref.d.ts'. ========"
+    "Resolving real path for '/ref.d.ts', result '/ref.d.ts'",
+    "======== Module name './ref' was successfully resolved to '/ref.d.ts'. ========",
+    "======== Resolving type reference directive 'lib', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
+    "File '/types/lib/package.json' does not exist.",
+    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/typeReferenceDirectives2.trace.json b/tests/baselines/reference/typeReferenceDirectives2.trace.json
index 826abe5d51a..93d3658447d 100644
--- a/tests/baselines/reference/typeReferenceDirectives2.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives2.trace.json
@@ -1,6 +1,6 @@
 [
-    "======== Resolving type reference directive 'lib', containing file not set, root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'lib', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "File '/types/lib/package.json' does not exist.",
     "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
diff --git a/tests/baselines/reference/typeReferenceDirectives3.trace.json b/tests/baselines/reference/typeReferenceDirectives3.trace.json
index c936a84dcc0..58b23783b0b 100644
--- a/tests/baselines/reference/typeReferenceDirectives3.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives3.trace.json
@@ -1,6 +1,11 @@
 [
-    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
+    "File '/types/lib/package.json' does not exist.",
+    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'lib', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "File '/types/lib/package.json' does not exist.",
     "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
diff --git a/tests/baselines/reference/typeReferenceDirectives4.trace.json b/tests/baselines/reference/typeReferenceDirectives4.trace.json
index c936a84dcc0..58b23783b0b 100644
--- a/tests/baselines/reference/typeReferenceDirectives4.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives4.trace.json
@@ -1,6 +1,11 @@
 [
-    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
+    "File '/types/lib/package.json' does not exist.",
+    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'lib', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "File '/types/lib/package.json' does not exist.",
     "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
diff --git a/tests/baselines/reference/typeReferenceDirectives5.trace.json b/tests/baselines/reference/typeReferenceDirectives5.trace.json
index b6adaf1f513..61341afdab3 100644
--- a/tests/baselines/reference/typeReferenceDirectives5.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives5.trace.json
@@ -1,6 +1,6 @@
 [
-    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "File '/types/lib/package.json' does not exist.",
     "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========",
@@ -10,5 +10,11 @@
     "File '/ref.ts' does not exist.",
     "File '/ref.tsx' does not exist.",
     "File '/ref.d.ts' exist - use it as a name resolution result.",
-    "======== Module name './ref' was successfully resolved to '/ref.d.ts'. ========"
+    "Resolving real path for '/ref.d.ts', result '/ref.d.ts'",
+    "======== Module name './ref' was successfully resolved to '/ref.d.ts'. ========",
+    "======== Resolving type reference directive 'lib', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
+    "File '/types/lib/package.json' does not exist.",
+    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/typeReferenceDirectives6.trace.json b/tests/baselines/reference/typeReferenceDirectives6.trace.json
index c936a84dcc0..58b23783b0b 100644
--- a/tests/baselines/reference/typeReferenceDirectives6.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives6.trace.json
@@ -1,6 +1,11 @@
 [
-    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
+    "File '/types/lib/package.json' does not exist.",
+    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'lib', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "File '/types/lib/package.json' does not exist.",
     "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
diff --git a/tests/baselines/reference/typeReferenceDirectives7.trace.json b/tests/baselines/reference/typeReferenceDirectives7.trace.json
index c936a84dcc0..58b23783b0b 100644
--- a/tests/baselines/reference/typeReferenceDirectives7.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives7.trace.json
@@ -1,6 +1,11 @@
 [
-    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'lib', containing file '/app.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
+    "File '/types/lib/package.json' does not exist.",
+    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'lib', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "File '/types/lib/package.json' does not exist.",
     "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
diff --git a/tests/baselines/reference/typeReferenceDirectives8.trace.json b/tests/baselines/reference/typeReferenceDirectives8.trace.json
index bfaae056c9e..37fa7900a7c 100644
--- a/tests/baselines/reference/typeReferenceDirectives8.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives8.trace.json
@@ -3,9 +3,10 @@
     "Module resolution kind is not specified, using 'NodeJs'.",
     "Loading module as file / folder, candidate module location '/mod1'.",
     "File '/mod1.ts' exist - use it as a name resolution result.",
+    "Resolving real path for '/mod1.ts', result '/mod1.ts'",
     "======== Module name './mod1' was successfully resolved to '/mod1.ts'. ========",
-    "======== Resolving type reference directive 'lib', containing file not set, root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'lib', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "File '/types/lib/package.json' does not exist.",
     "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
diff --git a/tests/baselines/reference/typeReferenceDirectives9.trace.json b/tests/baselines/reference/typeReferenceDirectives9.trace.json
index f4fc0937325..1024b0cdef3 100644
--- a/tests/baselines/reference/typeReferenceDirectives9.trace.json
+++ b/tests/baselines/reference/typeReferenceDirectives9.trace.json
@@ -3,14 +3,16 @@
     "Module resolution kind is not specified, using 'NodeJs'.",
     "Loading module as file / folder, candidate module location '/main'.",
     "File '/main.ts' exist - use it as a name resolution result.",
+    "Resolving real path for '/main.ts', result '/main.ts'",
     "======== Module name './main' was successfully resolved to '/main.ts'. ========",
     "======== Resolving module './mod1' from '/mod2.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
     "Loading module as file / folder, candidate module location '/mod1'.",
     "File '/mod1.ts' exist - use it as a name resolution result.",
+    "Resolving real path for '/mod1.ts', result '/mod1.ts'",
     "======== Module name './mod1' was successfully resolved to '/mod1.ts'. ========",
-    "======== Resolving type reference directive 'lib', containing file '/mod1.ts', root directory '/'. ========",
-    "Resolving with primary search path '/types/'",
+    "======== Resolving type reference directive 'lib', containing file '/mod1.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
     "File '/types/lib/package.json' does not exist.",
     "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========",
@@ -18,5 +20,11 @@
     "Module resolution kind is not specified, using 'NodeJs'.",
     "Loading module as file / folder, candidate module location '/main'.",
     "File '/main.ts' exist - use it as a name resolution result.",
-    "======== Module name './main' was successfully resolved to '/main.ts'. ========"
+    "Resolving real path for '/main.ts', result '/main.ts'",
+    "======== Module name './main' was successfully resolved to '/main.ts'. ========",
+    "======== Resolving type reference directive 'lib', containing file '/__inferred type names__.ts', root directory '/types'. ========",
+    "Resolving with primary search path '/types'",
+    "File '/types/lib/package.json' does not exist.",
+    "File '/types/lib/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'lib' was successfully resolved to '/types/lib/index.d.ts', primary: true. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/typingsLookup1.js b/tests/baselines/reference/typingsLookup1.js
index 1f89a2277aa..3927c3db077 100644
--- a/tests/baselines/reference/typingsLookup1.js
+++ b/tests/baselines/reference/typingsLookup1.js
@@ -4,8 +4,10 @@
 declare var $: { x: any };
 
 //// [a.ts]
+/// <reference types="jquery" />
 $.x;
 
 
 //// [a.js]
+/// <reference types="jquery" />
 $.x;
diff --git a/tests/baselines/reference/typingsLookup1.symbols b/tests/baselines/reference/typingsLookup1.symbols
index 8a21252d123..73d01df511e 100644
--- a/tests/baselines/reference/typingsLookup1.symbols
+++ b/tests/baselines/reference/typingsLookup1.symbols
@@ -1,10 +1,11 @@
-=== tests/cases/conformance/typings/a.ts ===
+=== /a.ts ===
+/// <reference types="jquery" />
 $.x;
 >$.x : Symbol(x, Decl(index.d.ts, 0, 16))
 >$ : Symbol($, Decl(index.d.ts, 0, 11))
 >x : Symbol(x, Decl(index.d.ts, 0, 16))
 
-=== tests/cases/conformance/typings/node_modules/@types/jquery/index.d.ts ===
+=== /node_modules/@types/jquery/index.d.ts ===
 declare var $: { x: any };
 >$ : Symbol($, Decl(index.d.ts, 0, 11))
 >x : Symbol(x, Decl(index.d.ts, 0, 16))
diff --git a/tests/baselines/reference/typingsLookup1.trace.json b/tests/baselines/reference/typingsLookup1.trace.json
new file mode 100644
index 00000000000..0463c920bd3
--- /dev/null
+++ b/tests/baselines/reference/typingsLookup1.trace.json
@@ -0,0 +1,18 @@
+[
+    "======== Resolving type reference directive 'jquery', containing file '/a.ts', root directory 'node_modules/@types'. ========",
+    "Resolving with primary search path 'node_modules/@types'",
+    "File 'node_modules/@types/jquery/package.json' does not exist.",
+    "File 'node_modules/@types/jquery/index.d.ts' does not exist.",
+    "Looking up in 'node_modules' folder, initial location '/'",
+    "File '/node_modules/jquery.ts' does not exist.",
+    "File '/node_modules/jquery.d.ts' does not exist.",
+    "File '/node_modules/jquery/package.json' does not exist.",
+    "File '/node_modules/jquery/index.ts' does not exist.",
+    "File '/node_modules/jquery/index.d.ts' does not exist.",
+    "File '/node_modules/@types/jquery.ts' does not exist.",
+    "File '/node_modules/@types/jquery.d.ts' does not exist.",
+    "File '/node_modules/@types/jquery/package.json' does not exist.",
+    "File '/node_modules/@types/jquery/index.ts' does not exist.",
+    "File '/node_modules/@types/jquery/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'jquery' was successfully resolved to '/node_modules/@types/jquery/index.d.ts', primary: false. ========"
+]
\ No newline at end of file
diff --git a/tests/baselines/reference/typingsLookup1.types b/tests/baselines/reference/typingsLookup1.types
index ca79a8248d5..e1b696bf343 100644
--- a/tests/baselines/reference/typingsLookup1.types
+++ b/tests/baselines/reference/typingsLookup1.types
@@ -1,10 +1,11 @@
-=== tests/cases/conformance/typings/a.ts ===
+=== /a.ts ===
+/// <reference types="jquery" />
 $.x;
 >$.x : any
 >$ : { x: any; }
 >x : any
 
-=== tests/cases/conformance/typings/node_modules/@types/jquery/index.d.ts ===
+=== /node_modules/@types/jquery/index.d.ts ===
 declare var $: { x: any };
 >$ : { x: any; }
 >x : any
diff --git a/tests/cases/compiler/commonSourceDir5.ts b/tests/cases/compiler/commonSourceDir5.ts
index d181bef68fe..7f5239976e8 100644
--- a/tests/cases/compiler/commonSourceDir5.ts
+++ b/tests/cases/compiler/commonSourceDir5.ts
@@ -1,6 +1,7 @@
 // @outFile: concat.js
 // @module: amd
 // @moduleResolution: node
+
 // @Filename: A:/bar.ts
 import {z} from "./foo";
 export var x = z + z;
diff --git a/tests/cases/compiler/typeReferenceDirectives1.ts b/tests/cases/compiler/typeReferenceDirectives1.ts
index 2127bd13f7b..e17e498b978 100644
--- a/tests/cases/compiler/typeReferenceDirectives1.ts
+++ b/tests/cases/compiler/typeReferenceDirectives1.ts
@@ -1,7 +1,7 @@
 // @noImplicitReferences: true
 // @traceResolution: true
 // @declaration: true
-// @typesRoot: /
+// @typeRoots: /types
 
 
 // @filename: /types/lib/index.d.ts
diff --git a/tests/cases/compiler/typeReferenceDirectives10.ts b/tests/cases/compiler/typeReferenceDirectives10.ts
index bf0768993c9..61971ba44b2 100644
--- a/tests/cases/compiler/typeReferenceDirectives10.ts
+++ b/tests/cases/compiler/typeReferenceDirectives10.ts
@@ -1,6 +1,6 @@
 // @noImplicitReferences: true
 // @declaration: true
-// @typesRoot: /
+// @typeRoots: /types
 // @traceResolution: true
 
 // @filename: /ref.d.ts
diff --git a/tests/cases/compiler/typeReferenceDirectives11.ts b/tests/cases/compiler/typeReferenceDirectives11.ts
index c955a5daffc..2d93e22bdcf 100644
--- a/tests/cases/compiler/typeReferenceDirectives11.ts
+++ b/tests/cases/compiler/typeReferenceDirectives11.ts
@@ -1,6 +1,6 @@
 // @noImplicitReferences: true
 // @declaration: true
-// @typesRoot: /
+// @typeRoots: /types
 // @traceResolution: true
 // @types: lib
 // @out: output.js
diff --git a/tests/cases/compiler/typeReferenceDirectives12.ts b/tests/cases/compiler/typeReferenceDirectives12.ts
index ef3c8d9755f..efdb1e8312b 100644
--- a/tests/cases/compiler/typeReferenceDirectives12.ts
+++ b/tests/cases/compiler/typeReferenceDirectives12.ts
@@ -1,6 +1,6 @@
 // @noImplicitReferences: true
 // @declaration: true
-// @typesRoot: /
+// @typeRoots: /types
 // @traceResolution: true
 // @out: output.js
 
diff --git a/tests/cases/compiler/typeReferenceDirectives13.ts b/tests/cases/compiler/typeReferenceDirectives13.ts
index 816d419e9d5..124c31274ac 100644
--- a/tests/cases/compiler/typeReferenceDirectives13.ts
+++ b/tests/cases/compiler/typeReferenceDirectives13.ts
@@ -1,6 +1,6 @@
 // @noImplicitReferences: true
 // @declaration: true
-// @typesRoot: /
+// @typeRoots: /types
 // @traceResolution: true
 
 // @filename: /ref.d.ts
diff --git a/tests/cases/compiler/typeReferenceDirectives2.ts b/tests/cases/compiler/typeReferenceDirectives2.ts
index eb651728cea..31a01a0b8e4 100644
--- a/tests/cases/compiler/typeReferenceDirectives2.ts
+++ b/tests/cases/compiler/typeReferenceDirectives2.ts
@@ -1,7 +1,7 @@
 // @noImplicitReferences: true
 // @traceResolution: true
 // @declaration: true
-// @typesRoot: /
+// @typeRoots: /types
 // @types: lib
 
 // @filename: /types/lib/index.d.ts
diff --git a/tests/cases/compiler/typeReferenceDirectives3.ts b/tests/cases/compiler/typeReferenceDirectives3.ts
index bf81268d141..4c2729ab389 100644
--- a/tests/cases/compiler/typeReferenceDirectives3.ts
+++ b/tests/cases/compiler/typeReferenceDirectives3.ts
@@ -1,6 +1,6 @@
 // @noImplicitReferences: true
 // @declaration: true
-// @typesRoot: /
+// @typeRoots: /types
 // @traceResolution: true
 
 // $ comes from d.ts file - no need to add type reference directive
diff --git a/tests/cases/compiler/typeReferenceDirectives4.ts b/tests/cases/compiler/typeReferenceDirectives4.ts
index 48eb8a5324a..ac7346895ef 100644
--- a/tests/cases/compiler/typeReferenceDirectives4.ts
+++ b/tests/cases/compiler/typeReferenceDirectives4.ts
@@ -1,7 +1,7 @@
 // @noImplicitReferences: true
 // @traceResolution: true
 // @declaration: true
-// @typesRoot: /
+// @typeRoots: /types
 
 // $ comes from d.ts file - no need to add type reference directive
 
diff --git a/tests/cases/compiler/typeReferenceDirectives5.ts b/tests/cases/compiler/typeReferenceDirectives5.ts
index 675f932da68..bb24b82b324 100644
--- a/tests/cases/compiler/typeReferenceDirectives5.ts
+++ b/tests/cases/compiler/typeReferenceDirectives5.ts
@@ -1,7 +1,7 @@
 // @noImplicitReferences: true
 // @traceResolution: true
 // @declaration: true
-// @typesRoot: /
+// @typeRoots: /types
 
 // @filename: /ref.d.ts
 export interface $ { x }
diff --git a/tests/cases/compiler/typeReferenceDirectives6.ts b/tests/cases/compiler/typeReferenceDirectives6.ts
index 120a743009c..7154963f1ef 100644
--- a/tests/cases/compiler/typeReferenceDirectives6.ts
+++ b/tests/cases/compiler/typeReferenceDirectives6.ts
@@ -1,7 +1,7 @@
 // @noImplicitReferences: true
 // @traceResolution: true
 // @declaration: true
-// @typesRoot: /
+// @typeRoots: /types
 
 // $ comes from type declaration file - type reference directive should be added
 
diff --git a/tests/cases/compiler/typeReferenceDirectives7.ts b/tests/cases/compiler/typeReferenceDirectives7.ts
index f18fed37741..79d42fa7018 100644
--- a/tests/cases/compiler/typeReferenceDirectives7.ts
+++ b/tests/cases/compiler/typeReferenceDirectives7.ts
@@ -1,7 +1,7 @@
 // @noImplicitReferences: true
 // @traceResolution: true
 // @declaration: true
-// @typesRoot: /
+// @typeRoots: /types
 
 // local value shadows global - no need to add type reference directive 
    
diff --git a/tests/cases/compiler/typeReferenceDirectives8.ts b/tests/cases/compiler/typeReferenceDirectives8.ts
index 2465d2afb10..c7725a3aab1 100644
--- a/tests/cases/compiler/typeReferenceDirectives8.ts
+++ b/tests/cases/compiler/typeReferenceDirectives8.ts
@@ -1,6 +1,6 @@
 // @noImplicitReferences: true
 // @declaration: true
-// @typesRoot: /
+// @typeRoots: /types
 // @traceResolution: true
 // @types: lib
 
diff --git a/tests/cases/compiler/typeReferenceDirectives9.ts b/tests/cases/compiler/typeReferenceDirectives9.ts
index eb8d6abaef1..610c7173c89 100644
--- a/tests/cases/compiler/typeReferenceDirectives9.ts
+++ b/tests/cases/compiler/typeReferenceDirectives9.ts
@@ -1,6 +1,6 @@
 // @noImplicitReferences: true
 // @declaration: true
-// @typesRoot: /
+// @typeRoots: /types
 // @traceResolution: true
 
 // @filename: /types/lib/index.d.ts
diff --git a/tests/cases/conformance/references/library-reference-1.ts b/tests/cases/conformance/references/library-reference-1.ts
index ca25441521f..c6b6cea36ef 100644
--- a/tests/cases/conformance/references/library-reference-1.ts
+++ b/tests/cases/conformance/references/library-reference-1.ts
@@ -1,13 +1,14 @@
 // @noImplicitReferences: true
 // @traceResolution: true
-// @typesRoot: /
+// @currentDirectory: /src
+// @typeRoots: types
 
 // We can find typings in the ./types folder
 
-// @filename: /types/jquery/index.d.ts
+// @filename: /src/types/jquery/index.d.ts
 declare var $: { foo(): void };
 
 
-// @filename: /consumer.ts
+// @filename: /src/consumer.ts
 /// <reference types="jquery" />
 $.foo();
diff --git a/tests/cases/conformance/references/library-reference-10.ts b/tests/cases/conformance/references/library-reference-10.ts
index 11e065b0a7d..bc9ec99edcf 100644
--- a/tests/cases/conformance/references/library-reference-10.ts
+++ b/tests/cases/conformance/references/library-reference-10.ts
@@ -1,18 +1,19 @@
 // @noImplicitReferences: true
 // @traceResolution: true
-// @typesRoot: /
+// @currentDirectory: /foo
+// @typeRoots: ./types
 
 // package.json in a primary reference can refer to another file
 
-// @filename: /types/jquery/package.json
+// @filename: /foo/types/jquery/package.json
 {
     "typings": "jquery.d.ts"
 }
 
-// @filename: /types/jquery/jquery.d.ts
+// @filename: /foo/types/jquery/jquery.d.ts
 declare var $: { foo(): void };
 
 
-// @filename: /consumer.ts
+// @filename: /foo/consumer.ts
 /// <reference types="jquery" />
 $.foo();
diff --git a/tests/cases/conformance/references/library-reference-13.ts b/tests/cases/conformance/references/library-reference-13.ts
index a96437f9b2c..92b4b259ba4 100644
--- a/tests/cases/conformance/references/library-reference-13.ts
+++ b/tests/cases/conformance/references/library-reference-13.ts
@@ -6,7 +6,8 @@
 // @filename: /a/tsconfig.json
 {
     "compilerOptions": {
-        "types": [ "jquery" ]
+        "types": [ "jquery" ],
+        "typeRoots": ["/a/types"]
     }
 }
 
diff --git a/tests/cases/conformance/references/library-reference-14.ts b/tests/cases/conformance/references/library-reference-14.ts
index 53bca2ab40d..fa4a63cfcc0 100644
--- a/tests/cases/conformance/references/library-reference-14.ts
+++ b/tests/cases/conformance/references/library-reference-14.ts
@@ -1,7 +1,8 @@
 // @noImplicitReferences: true
 // @traceResolution: true
 // @types: jquery
-// @typesRoot: /a
+// @typeRoots: /a/types
+// @currentDirectory: /a
 
 // @filename: /a/types/jquery/index.d.ts
 declare var $: { foo(): void };
diff --git a/tests/cases/conformance/references/library-reference-15.ts b/tests/cases/conformance/references/library-reference-15.ts
index dd2179d1af6..417012a4539 100644
--- a/tests/cases/conformance/references/library-reference-15.ts
+++ b/tests/cases/conformance/references/library-reference-15.ts
@@ -1,11 +1,15 @@
 // @noImplicitReferences: true
 // @traceResolution: true
 // @types: jquery
-// @currentDirectory: /
+// @currentDirectory: /a
+// @typeRoots: types
 
 // @filename: /a/types/jquery/index.d.ts
 declare var $: { foo(): void };
 
+// @filename: /a/types/jquery2/index.d.ts
+declare var $2: { foo(): void };
 
 // @filename: /a/b/consumer.ts
-$.foo();
+$.foo(); // should OK
+$2.foo(); // should error
\ No newline at end of file
diff --git a/tests/cases/conformance/references/library-reference-2.ts b/tests/cases/conformance/references/library-reference-2.ts
index d8975664428..9ac7cd4f4d3 100644
--- a/tests/cases/conformance/references/library-reference-2.ts
+++ b/tests/cases/conformance/references/library-reference-2.ts
@@ -1,6 +1,7 @@
 // @noImplicitReferences: true
 // @traceResolution: true
-// @typesRoot: /
+// @typeRoots: /types
+// @currentDirectory: test
 
 // package.json in a primary reference can refer to another file
 
diff --git a/tests/cases/conformance/references/library-reference-3.ts b/tests/cases/conformance/references/library-reference-3.ts
index 1af6df89d19..88ef916eaae 100644
--- a/tests/cases/conformance/references/library-reference-3.ts
+++ b/tests/cases/conformance/references/library-reference-3.ts
@@ -1,6 +1,6 @@
 // @noImplicitReferences: true
 // @traceResolution: true
-// @typesRoot: /src
+// @currentDirectory: /src
 
 // Secondary references are possible
 
diff --git a/tests/cases/conformance/references/library-reference-4.ts b/tests/cases/conformance/references/library-reference-4.ts
index 92f1b4008be..9a615f470ef 100644
--- a/tests/cases/conformance/references/library-reference-4.ts
+++ b/tests/cases/conformance/references/library-reference-4.ts
@@ -1,6 +1,7 @@
 // @noImplicitReferences: true
 // @traceResolution: true
-// @typesRoot: /src
+// @typeRoots: /src
+// @currentDirectory: test
 
 // Secondary references may be duplicated if they agree in content
 
diff --git a/tests/cases/conformance/references/library-reference-5.ts b/tests/cases/conformance/references/library-reference-5.ts
index 1fe327a1c69..dd72da36dd0 100644
--- a/tests/cases/conformance/references/library-reference-5.ts
+++ b/tests/cases/conformance/references/library-reference-5.ts
@@ -1,6 +1,7 @@
 // @noImplicitReferences: true
 // @traceResolution: true
 // @currentDirectory: /
+// @typeRoots: types
 
 // Secondary references may not be duplicated if they disagree in content
 
diff --git a/tests/cases/conformance/references/library-reference-6.ts b/tests/cases/conformance/references/library-reference-6.ts
index a746262dd73..765a6760aa4 100644
--- a/tests/cases/conformance/references/library-reference-6.ts
+++ b/tests/cases/conformance/references/library-reference-6.ts
@@ -1,9 +1,10 @@
 // @noImplicitReferences: true
 // @traceResolution: true
+// @currentDirectory: /
 
 // The primary lookup folder is relative to tsconfig.json, if present
 
-// @filename: /types/alpha/index.d.ts
+// @filename: /node_modules/@types/alpha/index.d.ts
 declare var alpha: { a: string };
 
 // @filename: /src/foo.ts
@@ -12,4 +13,7 @@ var x: string = alpha.a;
 
 // @filename: /tsconfig.json
 {
+	"compilerOptions": {
+		"typesRoot": "types"
+	}
 }
diff --git a/tests/cases/conformance/references/library-reference-8.ts b/tests/cases/conformance/references/library-reference-8.ts
index 9de93776989..1c4ab76f8a1 100644
--- a/tests/cases/conformance/references/library-reference-8.ts
+++ b/tests/cases/conformance/references/library-reference-8.ts
@@ -1,18 +1,19 @@
 // @noImplicitReferences: true
 // @traceResolution: true
-// @typesRoot: /
+// @typeRoots: /test/types
+// @currentDirectory: /test
 
 // Don't crash in circular library reference situations
 
-// @filename: /types/alpha/index.d.ts
+// @filename: /test/types/alpha/index.d.ts
 /// <reference types="beta" />
 declare var alpha: { a: string };
 
-// @filename: /types/beta/index.d.ts
+// @filename: /test/types/beta/index.d.ts
 /// <reference types="alpha" />
 declare var beta: { b: string };
 
-// @filename: /foo.ts
+// @filename: /test/foo.ts
 /// <reference types="alpha" />
 /// <reference types="beta" />
 var x: string = alpha.a + beta.b;
diff --git a/tests/cases/conformance/references/library-reference-9.ts b/tests/cases/conformance/references/library-reference-9.ts
deleted file mode 100644
index a187d3c23b9..00000000000
--- a/tests/cases/conformance/references/library-reference-9.ts
+++ /dev/null
@@ -1,20 +0,0 @@
-// @noImplicitReferences: true
-// @traceResolution: true
-
-// Use types search path
-
-// @filename: /share/typelib/alpha/index.d.ts
-declare var alpha: { a: string };
-
-// @filename: /base/src/foo.ts
-/// <reference types="alpha" />
-var x: string = alpha.a;
-
-// @filename: /tsconfig.json
-{
-    "compilerOptions": {
-        "typesSearchPaths": [
-            "./share/typelib"
-        ]
-    }
-}
diff --git a/tests/cases/conformance/typings/typingsLookup1.ts b/tests/cases/conformance/typings/typingsLookup1.ts
index 702bd4bc21c..555d4569af3 100644
--- a/tests/cases/conformance/typings/typingsLookup1.ts
+++ b/tests/cases/conformance/typings/typingsLookup1.ts
@@ -1,10 +1,12 @@
+// @traceResolution: true
 // @noImplicitReferences: true
 
-// @filename: tsconfig.json
+// @filename: /tsconfig.json
 { "files": "a.ts" }
 
-// @filename: node_modules/@types/jquery/index.d.ts
+// @filename: /node_modules/@types/jquery/index.d.ts
 declare var $: { x: any };
 
-// @filename: a.ts
+// @filename: /a.ts
+/// <reference types="jquery" />
 $.x;
diff --git a/tests/cases/fourslash/goToDefinitionTypeReferenceDirective.ts b/tests/cases/fourslash/goToDefinitionTypeReferenceDirective.ts
index 3aaa3ab980f..78dfa94c5e4 100644
--- a/tests/cases/fourslash/goToDefinitionTypeReferenceDirective.ts
+++ b/tests/cases/fourslash/goToDefinitionTypeReferenceDirective.ts
@@ -1,6 +1,6 @@
 /// <reference path="fourslash.ts"/>
 
-// @typesRoot: src
+// @typeRoots: src/types
 // @Filename: src/types/lib/index.d.ts
 /////*0*/declare let $: {x: number};
 
diff --git a/tests/cases/fourslash/shims-pp/goToDefinitionTypeReferenceDirective.ts b/tests/cases/fourslash/shims-pp/goToDefinitionTypeReferenceDirective.ts
index 3aaa3ab980f..78dfa94c5e4 100644
--- a/tests/cases/fourslash/shims-pp/goToDefinitionTypeReferenceDirective.ts
+++ b/tests/cases/fourslash/shims-pp/goToDefinitionTypeReferenceDirective.ts
@@ -1,6 +1,6 @@
 /// <reference path="fourslash.ts"/>
 
-// @typesRoot: src
+// @typeRoots: src/types
 // @Filename: src/types/lib/index.d.ts
 /////*0*/declare let $: {x: number};
 
diff --git a/tests/cases/fourslash/shims/goToDefinitionTypeReferenceDirective.ts b/tests/cases/fourslash/shims/goToDefinitionTypeReferenceDirective.ts
index 3aaa3ab980f..dc2fc356c57 100644
--- a/tests/cases/fourslash/shims/goToDefinitionTypeReferenceDirective.ts
+++ b/tests/cases/fourslash/shims/goToDefinitionTypeReferenceDirective.ts
@@ -1,6 +1,6 @@
-/// <reference path="fourslash.ts"/>
+/// <reference path="../fourslash.ts"/>
 
-// @typesRoot: src
+// @typeRoots: src/types
 // @Filename: src/types/lib/index.d.ts
 /////*0*/declare let $: {x: number};
 
diff --git a/tests/cases/unittests/moduleResolution.ts b/tests/cases/unittests/moduleResolution.ts
index ab5eddc0997..16fc7df8d70 100644
--- a/tests/cases/unittests/moduleResolution.ts
+++ b/tests/cases/unittests/moduleResolution.ts
@@ -314,6 +314,7 @@ namespace ts {
                 getDefaultLibFileName: () => "lib.d.ts",
                 writeFile: (fileName, content): void => { throw new Error("NotImplemented"); },
                 getCurrentDirectory: () => currentDirectory,
+                getDirectories: () => [],
                 getCanonicalFileName: fileName => fileName.toLowerCase(),
                 getNewLine: () => "\r\n",
                 useCaseSensitiveFileNames: () => false,
@@ -397,6 +398,7 @@ export = C;
                 getDefaultLibFileName: () => "lib.d.ts",
                 writeFile: (fileName, content): void => { throw new Error("NotImplemented"); },
                 getCurrentDirectory: () => currentDirectory,
+                getDirectories: () => [],
                 getCanonicalFileName,
                 getNewLine: () => "\r\n",
                 useCaseSensitiveFileNames: () => useCaseSensitiveFileNames,
@@ -955,7 +957,7 @@ import b = require("./moduleB.ts");
     describe("Type reference directive resolution: ", () => {
         function test(typesRoot: string, typeDirective: string, primary: boolean, initialFile: File, targetFile: File, ...otherFiles: File[]) {
             const host = createModuleResolutionHost(/*hasDirectoryExists*/ false, ...[initialFile, targetFile].concat(...otherFiles));
-            const result = resolveTypeReferenceDirective(typeDirective, initialFile.name, {typesRoot}, host);
+            const result = resolveTypeReferenceDirective(typeDirective, initialFile.name, {typeRoots: [typesRoot]}, host);
             assert(result.resolvedTypeReferenceDirective.resolvedFileName !== undefined, "expected type directive to be resolved");
             assert.equal(result.resolvedTypeReferenceDirective.resolvedFileName, targetFile.name, "unexpected result of type reference resolution");
             assert.equal(result.resolvedTypeReferenceDirective.primary, primary, "unexpected 'primary' value");
@@ -965,64 +967,64 @@ import b = require("./moduleB.ts");
             {
                 const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/src/types/lib/index.d.ts" };
-                test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2);
+                test(/*typesRoot*/"/root/src/types", /* typeDirective */"lib", /*primary*/ true, f1, f2);
             }
             {
                 const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/src/types/lib/typings/lib.d.ts" };
                 const package = { name: "/root/src/types/lib/package.json", content: JSON.stringify({types: "typings/lib.d.ts"}) };
-                test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2, package);
+                test(/*typesRoot*/"/root/src/types", /* typeDirective */"lib", /*primary*/ true, f1, f2, package);
             }
             {
                 const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/src/node_modules/lib/index.d.ts" };
-                test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2);
+                test(/*typesRoot*/"/root/src/types", /* typeDirective */"lib", /*primary*/ false, f1, f2);
             }
             {
                 const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/src/node_modules/lib/typings/lib.d.ts" };
                 const package = { name: "/root/src/node_modules/lib/package.json", content: JSON.stringify({types: "typings/lib.d.ts"}) };
-                test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2, package);
+                test(/*typesRoot*/"/root/src/types", /* typeDirective */"lib", /*primary*/ false, f1, f2, package);
             }
             {
                 const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/src/node_modules/@types/lib/index.d.ts" };
-                test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2);
+                test(/*typesRoot*/"/root/src/types", /* typeDirective */"lib", /*primary*/ false, f1, f2);
             }
             {
                 const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/src/node_modules/@types/lib/typings/lib.d.ts" };
                 const package = { name: "/root/src/node_modules/@types/lib/package.json", content: JSON.stringify({types: "typings/lib.d.ts"}) };
-                test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2, package);
+                test(/*typesRoot*/"/root/src/types", /* typeDirective */"lib", /*primary*/ false, f1, f2, package);
             }
         });
         it("Can be resolved from secondary location", () => {
             {
                 const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/node_modules/lib.d.ts" };
-                test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ false, f1, f2);
+                test(/*typesRoot*/"/root/src/types", /* typeDirective */"lib", /*primary*/ false, f1, f2);
             }
             {
                 const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/node_modules/lib/index.d.ts" };
-                test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ false, f1, f2);
+                test(/*typesRoot*/"/root/src/types", /* typeDirective */"lib", /*primary*/ false, f1, f2);
             }
             {
                 const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/node_modules/lib/typings/lib.d.ts" };
                 const package = { name: "/root/node_modules/lib/package.json", content: JSON.stringify({typings: "typings/lib.d.ts"}) };
-                test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ false, f1, f2, package);
+                test(/*typesRoot*/"/root/src/types", /* typeDirective */"lib", /*primary*/ false, f1, f2, package);
             }
             {
                 const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/node_modules/@types/lib/index.d.ts" };
-                test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ false, f1, f2);
+                test(/*typesRoot*/"/root/src/types", /* typeDirective */"lib", /*primary*/ false, f1, f2);
             }
             {
                 const f1 = { name: "/root/src/app.ts" };
                 const f2 = { name: "/root/node_modules/@types/lib/typings/lib.d.ts" };
                 const package = { name: "/root/node_modules/@types/lib/package.json", content: JSON.stringify({typings: "typings/lib.d.ts"}) };
-                test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ false, f1, f2, package);
+                test(/*typesRoot*/"/root/src/types", /* typeDirective */"lib", /*primary*/ false, f1, f2, package);
             }
         });
         it("Primary resolution overrides secondary resolutions", () => {
@@ -1030,7 +1032,7 @@ import b = require("./moduleB.ts");
                 const f1 = { name: "/root/src/a/b/c/app.ts" };
                 const f2 = { name: "/root/src/types/lib/index.d.ts" };
                 const f3 = { name: "/root/src/a/b/node_modules/lib.d.ts" };
-                test(/*typesRoot*/"/root/src", /* typeDirective */"lib", /*primary*/ true, f1, f2, f3);
+                test(/*typesRoot*/"/root/src/types", /* typeDirective */"lib", /*primary*/ true, f1, f2, f3);
             }
         });
         it("Reused program keeps errors", () => {
@@ -1050,6 +1052,7 @@ import b = require("./moduleB.ts");
                     throw new Error("NYI");
                 },
                 getCurrentDirectory: () => "/",
+                getDirectories: () => [],
                 getCanonicalFileName: f => f.toLowerCase(),
                 getNewLine: () => "\r\n",
                 useCaseSensitiveFileNames: () => false,
diff --git a/tests/cases/unittests/reuseProgramStructure.ts b/tests/cases/unittests/reuseProgramStructure.ts
index 6ab90595f9f..154cfdd702f 100644
--- a/tests/cases/unittests/reuseProgramStructure.ts
+++ b/tests/cases/unittests/reuseProgramStructure.ts
@@ -117,6 +117,9 @@ namespace ts {
             getCurrentDirectory(): string {
                 return "";
             },
+            getDirectories(path: string): string[] {
+                return [];
+            },
             getCanonicalFileName(fileName): string {
                 return sys && sys.useCaseSensitiveFileNames ? fileName : fileName.toLowerCase();
             },
@@ -336,7 +339,7 @@ namespace ts {
                 { name: "/a.ts", text: SourceText.New("/// <reference types='typedefs'/>", "", "var x = $") },
                 { name: "/types/typedefs/index.d.ts", text: SourceText.New("", "", "declare var $: number") },
             ];
-            const options: CompilerOptions = { target, typesRoot: "/" };
+            const options: CompilerOptions = { target, typeRoots: ["/types"] };
 
             const program_1 = newProgram(files, ["/a.ts"], options);
             checkResolvedTypeDirectivesCache(program_1, "/a.ts", { "typedefs": { resolvedFileName: "/types/typedefs/index.d.ts", primary: true } });

From 4a8f94a5535548a3b9cc8eaf4c02c0830fba088f Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Fri, 10 Jun 2016 16:17:32 -0700
Subject: [PATCH 259/332] Type guards using discriminant properties of string
 literal types

---
 src/compiler/binder.ts  | 56 ++++++++++++++++++++++++++++++-----------
 src/compiler/checker.ts | 47 ++++++++++++++++++++++++++++------
 2 files changed, 80 insertions(+), 23 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 8c48d984b78..f9d0f443347 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -577,12 +577,6 @@ namespace ts {
             }
         }
 
-        function isNarrowableReference(expr: Expression): boolean {
-            return expr.kind === SyntaxKind.Identifier ||
-                expr.kind === SyntaxKind.ThisKeyword ||
-                expr.kind === SyntaxKind.PropertyAccessExpression && isNarrowableReference((<PropertyAccessExpression>expr).expression);
-        }
-
         function isNarrowingExpression(expr: Expression): boolean {
             switch (expr.kind) {
                 case SyntaxKind.Identifier:
@@ -590,7 +584,7 @@ namespace ts {
                 case SyntaxKind.PropertyAccessExpression:
                     return isNarrowableReference(expr);
                 case SyntaxKind.CallExpression:
-                    return true;
+                    return hasNarrowableArgument(<CallExpression>expr);
                 case SyntaxKind.ParenthesizedExpression:
                     return isNarrowingExpression((<ParenthesizedExpression>expr).expression);
                 case SyntaxKind.BinaryExpression:
@@ -601,6 +595,27 @@ namespace ts {
             return false;
         }
 
+        function isNarrowableReference(expr: Expression): boolean {
+            return expr.kind === SyntaxKind.Identifier ||
+                expr.kind === SyntaxKind.ThisKeyword ||
+                expr.kind === SyntaxKind.PropertyAccessExpression && isNarrowableReference((<PropertyAccessExpression>expr).expression);
+        }
+
+        function hasNarrowableArgument(expr: CallExpression) {
+            if (expr.arguments) {
+                for (const argument of expr.arguments) {
+                    if (isNarrowableReference(argument)) {
+                        return true;
+                    }
+                }
+            }
+            if (expr.expression.kind === SyntaxKind.PropertyAccessExpression &&
+                isNarrowableReference((<PropertyAccessExpression>expr.expression).expression)) {
+                return true;
+            }
+            return false;
+        }
+
         function isNarrowingBinaryExpression(expr: BinaryExpression) {
             switch (expr.operatorToken.kind) {
                 case SyntaxKind.EqualsToken:
@@ -609,21 +624,32 @@ namespace ts {
                 case SyntaxKind.ExclamationEqualsToken:
                 case SyntaxKind.EqualsEqualsEqualsToken:
                 case SyntaxKind.ExclamationEqualsEqualsToken:
-                    if (isNarrowingExpression(expr.left) && (expr.right.kind === SyntaxKind.NullKeyword || expr.right.kind === SyntaxKind.Identifier)) {
-                        return true;
-                    }
-                    if (expr.left.kind === SyntaxKind.TypeOfExpression && isNarrowingExpression((<TypeOfExpression>expr.left).expression) && expr.right.kind === SyntaxKind.StringLiteral) {
-                        return true;
-                    }
-                    return false;
+                    return (expr.right.kind === SyntaxKind.NullKeyword || expr.right.kind === SyntaxKind.Identifier && (<Identifier>expr.right).text === "undefined") && isNarrowableOperand(expr.left) ||
+                        expr.left.kind === SyntaxKind.PropertyAccessExpression && isNarrowableReference((<PropertyAccessExpression>expr.left).expression) ||
+                        expr.left.kind === SyntaxKind.TypeOfExpression && isNarrowableOperand((<TypeOfExpression>expr.left).expression) && expr.right.kind === SyntaxKind.StringLiteral;
                 case SyntaxKind.InstanceOfKeyword:
-                    return isNarrowingExpression(expr.left);
+                    return isNarrowableOperand(expr.left);
                 case SyntaxKind.CommaToken:
                     return isNarrowingExpression(expr.right);
             }
             return false;
         }
 
+        function isNarrowableOperand(expr: Expression): boolean {
+            switch (expr.kind) {
+                case SyntaxKind.ParenthesizedExpression:
+                    return isNarrowableOperand((<ParenthesizedExpression>expr).expression);
+                case SyntaxKind.BinaryExpression:
+                    switch ((<BinaryExpression>expr).operatorToken.kind) {
+                        case SyntaxKind.EqualsToken:
+                            return isNarrowableOperand((<BinaryExpression>expr).left);
+                        case SyntaxKind.CommaToken:
+                            return isNarrowableOperand((<BinaryExpression>expr).right);
+                    }
+            }
+            return isNarrowableReference(expr);
+        }
+
         function createBranchLabel(): FlowLabel {
             return {
                 flags: FlowFlags.BranchLabel,
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 65335117cf2..105401c0015 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -5160,7 +5160,6 @@ namespace ts {
             if (hasProperty(stringLiteralTypes, text)) {
                 return stringLiteralTypes[text];
             }
-
             const type = stringLiteralTypes[text] = <StringLiteralType>createType(TypeFlags.StringLiteral);
             type.text = text;
             return type;
@@ -5625,6 +5624,10 @@ namespace ts {
             return checkTypeComparableTo(source, target, /*errorNode*/ undefined);
         }
 
+        function areTypesComparable(type1: Type, type2: Type): boolean {
+            return isTypeComparableTo(type1, type2) || isTypeComparableTo(type2, type1);
+        }
+
         function checkTypeSubtypeOf(source: Type, target: Type, errorNode: Node, headMessage?: DiagnosticMessage, containingMessageChain?: DiagnosticMessageChain): boolean {
             return checkTypeRelatedTo(source, target, subtypeRelation, errorNode, headMessage, containingMessageChain);
         }
@@ -6805,8 +6808,10 @@ namespace ts {
             return !!getPropertyOfType(type, "0");
         }
 
-        function isStringLiteralType(type: Type) {
-            return type.flags & TypeFlags.StringLiteral;
+        function isStringLiteralUnionType(type: Type): boolean {
+            return type.flags & TypeFlags.StringLiteral ? true :
+                type.flags & TypeFlags.Union ? forEach((<UnionType>type).types, isStringLiteralUnionType) :
+                false;
         }
 
         /**
@@ -7873,6 +7878,9 @@ namespace ts {
                         if (isNullOrUndefinedLiteral(expr.right)) {
                             return narrowTypeByNullCheck(type, expr, assumeTrue);
                         }
+                        if (expr.left.kind === SyntaxKind.PropertyAccessExpression) {
+                            return narrowTypeByDiscriminant(type, expr, assumeTrue);
+                        }
                         if (expr.left.kind === SyntaxKind.TypeOfExpression && expr.right.kind === SyntaxKind.StringLiteral) {
                             return narrowTypeByTypeof(type, expr, assumeTrue);
                         }
@@ -7903,6 +7911,33 @@ namespace ts {
                 return getTypeWithFacts(type, facts);
             }
 
+            function narrowTypeByDiscriminant(type: Type, expr: BinaryExpression, assumeTrue: boolean): Type {
+                // We have '==', '!=', '===', or '!==' operator with property access on left
+                if (!(type.flags & TypeFlags.Union) || !isMatchingReference(reference, (<PropertyAccessExpression>expr.left).expression)) {
+                    return type;
+                }
+                const propName = (<PropertyAccessExpression>expr.left).name.text;
+                const propType = getTypeOfPropertyOfType(type, propName);
+                if (!propType || !isStringLiteralUnionType(propType)) {
+                    return type;
+                }
+                const discriminantType = expr.right.kind === SyntaxKind.StringLiteral ? getStringLiteralTypeForText((<StringLiteral>expr.right).text) : checkExpression(expr.right);
+                if (!isStringLiteralUnionType(discriminantType)) {
+                    return type;
+                }
+                if (expr.operatorToken.kind === SyntaxKind.ExclamationEqualsToken ||
+                    expr.operatorToken.kind === SyntaxKind.ExclamationEqualsEqualsToken) {
+                    assumeTrue = !assumeTrue;
+                }
+                if (assumeTrue) {
+                    return getUnionType(filter((<UnionType>type).types, t => areTypesComparable(getTypeOfPropertyOfType(t, propName), discriminantType)));
+                }
+                if (discriminantType.flags & TypeFlags.StringLiteral) {
+                    return getUnionType(filter((<UnionType>type).types, t => getTypeOfPropertyOfType(t, propName) !== discriminantType));
+                }
+                return type;
+            }
+
             function narrowTypeByTypeof(type: Type, expr: BinaryExpression, assumeTrue: boolean): Type {
                 // We have '==', '!=', '====', or !==' operator with 'typeof xxx' on the left
                 // and string literal on the right
@@ -8892,10 +8927,6 @@ namespace ts {
             return applyToContextualType(type, t => getIndexTypeOfStructuredType(t, kind));
         }
 
-        function contextualTypeIsStringLiteralType(type: Type): boolean {
-            return !!(type.flags & TypeFlags.Union ? forEach((<UnionType>type).types, isStringLiteralType) : isStringLiteralType(type));
-        }
-
         // Return true if the given contextual type is a tuple-like type
         function contextualTypeIsTupleLikeType(type: Type): boolean {
             return !!(type.flags & TypeFlags.Union ? forEach((<UnionType>type).types, isTupleLikeType) : isTupleLikeType(type));
@@ -12557,7 +12588,7 @@ namespace ts {
 
         function checkStringLiteralExpression(node: StringLiteral): Type {
             const contextualType = getContextualType(node);
-            if (contextualType && contextualTypeIsStringLiteralType(contextualType)) {
+            if (contextualType && isStringLiteralUnionType(contextualType)) {
                 return getStringLiteralTypeForText(node.text);
             }
 

From 81d1ccfe87d8c872deaebe490d29ba6bb1a2fe88 Mon Sep 17 00:00:00 2001
From: Yui <yuit@users.noreply.github.com>
Date: Fri, 10 Jun 2016 18:22:20 -0700
Subject: [PATCH 260/332] Only inlineSourceMap when debugging through
 jake-browser (#9080)

* Only inlineSourceMap when debugging through jake-browser

* Address PR: fix typo in opt's property
---
 Jakefile.js | 44 ++++++++++++++++++++++++++++++++++++++++----
 1 file changed, 40 insertions(+), 4 deletions(-)

diff --git a/Jakefile.js b/Jakefile.js
index 85ae5f60361..df8edc7dded 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -276,6 +276,7 @@ var builtLocalCompiler = path.join(builtLocalDirectory, compilerFilename);
     * @param {boolean} opts.noResolve: true if compiler should not include non-rooted files in compilation
     * @param {boolean} opts.stripInternal: true if compiler should remove declarations marked as @internal
     * @param {boolean} opts.noMapRoot: true if compiler omit mapRoot option
+    * @param {boolean} opts.inlineSourceMap: true if compiler should inline sourceMap
     * @param callback: a function to execute after the compilation process ends
     */
 function compileFile(outFile, sources, prereqs, prefixes, useBuiltCompiler, opts, callback) {
@@ -313,7 +314,14 @@ function compileFile(outFile, sources, prereqs, prefixes, useBuiltCompiler, opts
         }
 
         if (useDebugMode) {
-            options += " --inlineSourceMap --inlineSources";
+            if (opts.inlineSourceMap) {
+                options += " --inlineSourceMap --inlineSources";
+            } else {
+                options += " -sourcemap";
+                if (!opts.noMapRoot) {
+                    options += " -mapRoot file:///" + path.resolve(path.dirname(outFile));
+                }
+            }
         } else {
             options += " --newLine LF";
         }
@@ -483,6 +491,7 @@ var tscFile = path.join(builtLocalDirectory, compilerFilename);
 compileFile(tscFile, compilerSources, [builtLocalDirectory, copyright].concat(compilerSources), [copyright], /*useBuiltCompiler:*/ false);
 
 var servicesFile = path.join(builtLocalDirectory, "typescriptServices.js");
+var servicesFileInBrowserTest = path.join(builtLocalDirectory, "typescriptServicesInBrowserTest.js");
 var standaloneDefinitionsFile = path.join(builtLocalDirectory, "typescriptServices.d.ts");
 var nodePackageFile = path.join(builtLocalDirectory, "typescript.js");
 var nodeDefinitionsFile = path.join(builtLocalDirectory, "typescript.d.ts");
@@ -491,7 +500,13 @@ var nodeStandaloneDefinitionsFile = path.join(builtLocalDirectory, "typescript_s
 compileFile(servicesFile, servicesSources,[builtLocalDirectory, copyright].concat(servicesSources),
             /*prefixes*/ [copyright],
             /*useBuiltCompiler*/ true,
-            { noOutFile: false, generateDeclarations: true, preserveConstEnums: true, keepComments: true, noResolve: false, stripInternal: true },
+            /*opts*/ { noOutFile: false,
+                generateDeclarations: true,
+                preserveConstEnums: true,
+                keepComments: true,
+                noResolve: false,
+                stripInternal: true
+            },
             /*callback*/ function () {
                 jake.cpR(servicesFile, nodePackageFile, {silent: true});
 
@@ -514,6 +529,21 @@ compileFile(servicesFile, servicesSources,[builtLocalDirectory, copyright].conca
                 fs.writeFileSync(nodeStandaloneDefinitionsFile, nodeStandaloneDefinitionsFileContents);
             });
 
+compileFile(
+    servicesFileInBrowserTest,
+    servicesSources,
+    [builtLocalDirectory, copyright].concat(servicesSources),
+    /*prefixes*/ [copyright],
+    /*useBuiltCompiler*/ true,
+    { noOutFile: false,
+      generateDeclarations: true,
+      preserveConstEnums: true,
+      keepComments: true,
+      noResolve: false,
+      stripInternal: true,
+      noMapRoot: true,
+      inlineSourceMap: true
+     });
 
 var serverFile = path.join(builtLocalDirectory, "tsserver.js");
 compileFile(serverFile, serverSources,[builtLocalDirectory, copyright].concat(serverSources), /*prefixes*/ [copyright], /*useBuiltCompiler*/ true);
@@ -614,7 +644,13 @@ directory(builtLocalDirectory);
 
 // Task to build the tests infrastructure using the built compiler
 var run = path.join(builtLocalDirectory, "run.js");
-compileFile(run, harnessSources, [builtLocalDirectory, tscFile].concat(libraryTargets).concat(harnessSources), [], /*useBuiltCompiler:*/ true);
+compileFile(
+    /*outFile*/ run,
+    /*source*/ harnessSources,
+    /*prereqs*/ [builtLocalDirectory, tscFile].concat(libraryTargets).concat(harnessSources),
+    /*prefixes*/ [],
+    /*useBuiltCompiler:*/ true,
+    /*opts*/ { inlineSourceMap: true });
 
 var internalTests = "internal/";
 
@@ -813,7 +849,7 @@ task("browserify", ["tests", builtLocalDirectory, nodeServerOutFile], function()
 }, {async: true});
 
 desc("Runs the tests using the built run.js file like 'jake runtests'. Syntax is jake runtests-browser. Additional optional parameters tests=[regex], port=, browser=[chrome|IE]");
-task("runtests-browser", ["tests", "browserify", builtLocalDirectory, servicesFile], function() {
+task("runtests-browser", ["tests", "browserify", builtLocalDirectory, servicesFileInBrowserTest], function() {
     cleanTestDirs();
     host = "node";
     port = process.env.port || process.env.p || '8888';

From e86f1837d0c2ce2e835445f5a4d01c95a70572e9 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Sat, 11 Jun 2016 13:12:08 -0700
Subject: [PATCH 261/332] Fix #9098: report missing function impelementation
 errors for merged classes and namespaces

---
 src/compiler/checker.ts                       |   7 +-
 .../missingFunctionImplementation.errors.txt  | 140 +++++++++++++++
 .../missingFunctionImplementation.js          | 168 ++++++++++++++++++
 .../missingFunctionImplementation2.errors.txt |  16 ++
 .../missingFunctionImplementation2.js         |  15 ++
 .../compiler/missingFunctionImplementation.ts |  79 ++++++++
 .../missingFunctionImplementation2.ts         |   8 +
 7 files changed, 428 insertions(+), 5 deletions(-)
 create mode 100644 tests/baselines/reference/missingFunctionImplementation.errors.txt
 create mode 100644 tests/baselines/reference/missingFunctionImplementation.js
 create mode 100644 tests/baselines/reference/missingFunctionImplementation2.errors.txt
 create mode 100644 tests/baselines/reference/missingFunctionImplementation2.js
 create mode 100644 tests/cases/compiler/missingFunctionImplementation.ts
 create mode 100644 tests/cases/compiler/missingFunctionImplementation2.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 28082914256..f35a53ce368 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -13552,9 +13552,6 @@ namespace ts {
                 }
             }
 
-            // when checking exported function declarations across modules check only duplicate implementations
-            // names and consistency of modifiers are verified when we check local symbol
-            const isExportSymbolInsideModule = symbol.parent && symbol.parent.flags & SymbolFlags.Module;
             let duplicateFunctionDeclaration = false;
             let multipleConstructorImplementation = false;
             for (const current of declarations) {
@@ -13587,7 +13584,7 @@ namespace ts {
                             duplicateFunctionDeclaration = true;
                         }
                     }
-                    else if (!isExportSymbolInsideModule && previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
+                    else if (previousDeclaration && previousDeclaration.parent === node.parent && previousDeclaration.end !== node.pos) {
                         reportImplementationExpectedError(previousDeclaration);
                     }
 
@@ -13621,7 +13618,7 @@ namespace ts {
             }
 
             // Abstract methods can't have an implementation -- in particular, they don't need one.
-            if (!isExportSymbolInsideModule && lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
+            if (lastSeenNonAmbientDeclaration && !lastSeenNonAmbientDeclaration.body &&
                 !(lastSeenNonAmbientDeclaration.flags & NodeFlags.Abstract) && !lastSeenNonAmbientDeclaration.questionToken) {
                 reportImplementationExpectedError(lastSeenNonAmbientDeclaration);
             }
diff --git a/tests/baselines/reference/missingFunctionImplementation.errors.txt b/tests/baselines/reference/missingFunctionImplementation.errors.txt
new file mode 100644
index 00000000000..4cf58d97d49
--- /dev/null
+++ b/tests/baselines/reference/missingFunctionImplementation.errors.txt
@@ -0,0 +1,140 @@
+tests/cases/compiler/missingFunctionImplementation.ts(3,3): error TS2391: Function implementation is missing or not immediately following the declaration.
+tests/cases/compiler/missingFunctionImplementation.ts(8,3): error TS2391: Function implementation is missing or not immediately following the declaration.
+tests/cases/compiler/missingFunctionImplementation.ts(16,3): error TS2391: Function implementation is missing or not immediately following the declaration.
+tests/cases/compiler/missingFunctionImplementation.ts(22,10): error TS2391: Function implementation is missing or not immediately following the declaration.
+tests/cases/compiler/missingFunctionImplementation.ts(28,10): error TS2391: Function implementation is missing or not immediately following the declaration.
+tests/cases/compiler/missingFunctionImplementation.ts(33,10): error TS2391: Function implementation is missing or not immediately following the declaration.
+tests/cases/compiler/missingFunctionImplementation.ts(41,10): error TS2391: Function implementation is missing or not immediately following the declaration.
+tests/cases/compiler/missingFunctionImplementation.ts(48,10): error TS2300: Duplicate identifier 'm'.
+tests/cases/compiler/missingFunctionImplementation.ts(49,10): error TS2300: Duplicate identifier 'm'.
+tests/cases/compiler/missingFunctionImplementation.ts(49,10): error TS2391: Function implementation is missing or not immediately following the declaration.
+tests/cases/compiler/missingFunctionImplementation.ts(52,19): error TS2300: Duplicate identifier 'm'.
+tests/cases/compiler/missingFunctionImplementation.ts(57,10): error TS2300: Duplicate identifier 'm'.
+tests/cases/compiler/missingFunctionImplementation.ts(60,19): error TS2300: Duplicate identifier 'm'.
+tests/cases/compiler/missingFunctionImplementation.ts(60,19): error TS2391: Function implementation is missing or not immediately following the declaration.
+tests/cases/compiler/missingFunctionImplementation.ts(65,19): error TS2391: Function implementation is missing or not immediately following the declaration.
+tests/cases/compiler/missingFunctionImplementation.ts(73,19): error TS2393: Duplicate function implementation.
+tests/cases/compiler/missingFunctionImplementation.ts(74,19): error TS2393: Duplicate function implementation.
+tests/cases/compiler/missingFunctionImplementation.ts(75,19): error TS2393: Duplicate function implementation.
+tests/cases/compiler/missingFunctionImplementation.ts(78,19): error TS2393: Duplicate function implementation.
+
+
+==== tests/cases/compiler/missingFunctionImplementation.ts (19 errors) ====
+    
+    export class C1 {
+      m(): void;
+      ~
+!!! error TS2391: Function implementation is missing or not immediately following the declaration.
+    }
+    
+    // merged with a namespace
+    export class C2 {
+      m(): void;
+      ~
+!!! error TS2391: Function implementation is missing or not immediately following the declaration.
+    }
+    export namespace C2 { }
+    
+    
+    // merged with a namespace, multiple overloads
+    class C3 {
+      m(a, b);
+      m(a);
+      ~
+!!! error TS2391: Function implementation is missing or not immediately following the declaration.
+    }
+    namespace C3 { }
+    
+    // static methods, multiple overloads
+    class C4 {
+      static m(a): void;
+             ~
+!!! error TS2391: Function implementation is missing or not immediately following the declaration.
+    }
+    
+    // static methods, multiple overloads
+    class C5 {
+      static m(a): void;
+      static m(): void;
+             ~
+!!! error TS2391: Function implementation is missing or not immediately following the declaration.
+    }
+    
+    // merged with namespace, static methods
+    class C6 {
+      static m(): void;
+             ~
+!!! error TS2391: Function implementation is missing or not immediately following the declaration.
+    }
+    namespace C6 {
+    }
+    
+    // merged with namespace, static methods, multiple overloads
+    class C7 {
+      static m(a): void;
+      static m(): void;
+             ~
+!!! error TS2391: Function implementation is missing or not immediately following the declaration.
+    }
+    namespace C7 {
+    }
+    
+    // merged with namespace, static methods, duplicate declarations
+    class C8 {
+      static m(a): void;
+             ~
+!!! error TS2300: Duplicate identifier 'm'.
+      static m(a, b): void;
+             ~
+!!! error TS2300: Duplicate identifier 'm'.
+             ~
+!!! error TS2391: Function implementation is missing or not immediately following the declaration.
+    }
+    namespace C8 {
+      export function m(a?, b?): void { }
+                      ~
+!!! error TS2300: Duplicate identifier 'm'.
+    }
+    
+    // merged with namespace, static methods, duplicate declarations
+    class C9 {
+      static m(a): void { }
+             ~
+!!! error TS2300: Duplicate identifier 'm'.
+    }
+    namespace C9 {
+      export function m(a): void;
+                      ~
+!!! error TS2300: Duplicate identifier 'm'.
+                      ~
+!!! error TS2391: Function implementation is missing or not immediately following the declaration.
+    }
+    
+    // merged namespaces
+    namespace N10 {
+      export function m(a): void;
+                      ~
+!!! error TS2391: Function implementation is missing or not immediately following the declaration.
+    }
+    namespace N10 {
+      export function m(a): void { }
+    }
+    
+    // merged namespaces, duplicate defintions
+    namespace N12 {
+      export function m(a): void;
+                      ~
+!!! error TS2393: Duplicate function implementation.
+      export function m(): void;
+                      ~
+!!! error TS2393: Duplicate function implementation.
+      export function m(a?): void { }
+                      ~
+!!! error TS2393: Duplicate function implementation.
+    }
+    namespace N12 {
+      export function m(a): void { }
+                      ~
+!!! error TS2393: Duplicate function implementation.
+    }
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/missingFunctionImplementation.js b/tests/baselines/reference/missingFunctionImplementation.js
new file mode 100644
index 00000000000..a452c8080b7
--- /dev/null
+++ b/tests/baselines/reference/missingFunctionImplementation.js
@@ -0,0 +1,168 @@
+//// [missingFunctionImplementation.ts]
+
+export class C1 {
+  m(): void;
+}
+
+// merged with a namespace
+export class C2 {
+  m(): void;
+}
+export namespace C2 { }
+
+
+// merged with a namespace, multiple overloads
+class C3 {
+  m(a, b);
+  m(a);
+}
+namespace C3 { }
+
+// static methods, multiple overloads
+class C4 {
+  static m(a): void;
+}
+
+// static methods, multiple overloads
+class C5 {
+  static m(a): void;
+  static m(): void;
+}
+
+// merged with namespace, static methods
+class C6 {
+  static m(): void;
+}
+namespace C6 {
+}
+
+// merged with namespace, static methods, multiple overloads
+class C7 {
+  static m(a): void;
+  static m(): void;
+}
+namespace C7 {
+}
+
+// merged with namespace, static methods, duplicate declarations
+class C8 {
+  static m(a): void;
+  static m(a, b): void;
+}
+namespace C8 {
+  export function m(a?, b?): void { }
+}
+
+// merged with namespace, static methods, duplicate declarations
+class C9 {
+  static m(a): void { }
+}
+namespace C9 {
+  export function m(a): void;
+}
+
+// merged namespaces
+namespace N10 {
+  export function m(a): void;
+}
+namespace N10 {
+  export function m(a): void { }
+}
+
+// merged namespaces, duplicate defintions
+namespace N12 {
+  export function m(a): void;
+  export function m(): void;
+  export function m(a?): void { }
+}
+namespace N12 {
+  export function m(a): void { }
+}
+
+
+//// [missingFunctionImplementation.js]
+"use strict";
+var C1 = (function () {
+    function C1() {
+    }
+    return C1;
+}());
+exports.C1 = C1;
+// merged with a namespace
+var C2 = (function () {
+    function C2() {
+    }
+    return C2;
+}());
+exports.C2 = C2;
+// merged with a namespace, multiple overloads
+var C3 = (function () {
+    function C3() {
+    }
+    return C3;
+}());
+// static methods, multiple overloads
+var C4 = (function () {
+    function C4() {
+    }
+    return C4;
+}());
+// static methods, multiple overloads
+var C5 = (function () {
+    function C5() {
+    }
+    return C5;
+}());
+// merged with namespace, static methods
+var C6 = (function () {
+    function C6() {
+    }
+    return C6;
+}());
+// merged with namespace, static methods, multiple overloads
+var C7 = (function () {
+    function C7() {
+    }
+    return C7;
+}());
+// merged with namespace, static methods, duplicate declarations
+var C8 = (function () {
+    function C8() {
+    }
+    return C8;
+}());
+var C8;
+(function (C8) {
+    function m(a, b) { }
+    C8.m = m;
+})(C8 || (C8 = {}));
+// merged with namespace, static methods, duplicate declarations
+var C9 = (function () {
+    function C9() {
+    }
+    C9.m = function (a) { };
+    return C9;
+}());
+var C9;
+(function (C9) {
+})(C9 || (C9 = {}));
+// merged namespaces
+var N10;
+(function (N10) {
+})(N10 || (N10 = {}));
+var N10;
+(function (N10) {
+    function m(a) { }
+    N10.m = m;
+})(N10 || (N10 = {}));
+// merged namespaces, duplicate defintions
+var N12;
+(function (N12) {
+    function m(a) { }
+    N12.m = m;
+})(N12 || (N12 = {}));
+var N12;
+(function (N12) {
+    function m(a) { }
+    N12.m = m;
+})(N12 || (N12 = {}));
diff --git a/tests/baselines/reference/missingFunctionImplementation2.errors.txt b/tests/baselines/reference/missingFunctionImplementation2.errors.txt
new file mode 100644
index 00000000000..a695482e1fb
--- /dev/null
+++ b/tests/baselines/reference/missingFunctionImplementation2.errors.txt
@@ -0,0 +1,16 @@
+tests/cases/compiler/missingFunctionImplementation2_a.ts(3,19): error TS2384: Overload signatures must all be ambient or non-ambient.
+tests/cases/compiler/missingFunctionImplementation2_b.ts(1,17): error TS2391: Function implementation is missing or not immediately following the declaration.
+
+
+==== tests/cases/compiler/missingFunctionImplementation2_a.ts (1 errors) ====
+    export {};
+    declare module "./missingFunctionImplementation2_b.ts" {
+      export function f(a, b): void;
+                      ~
+!!! error TS2384: Overload signatures must all be ambient or non-ambient.
+    }
+    
+==== tests/cases/compiler/missingFunctionImplementation2_b.ts (1 errors) ====
+    export function f(a?, b?);
+                    ~
+!!! error TS2391: Function implementation is missing or not immediately following the declaration.
\ No newline at end of file
diff --git a/tests/baselines/reference/missingFunctionImplementation2.js b/tests/baselines/reference/missingFunctionImplementation2.js
new file mode 100644
index 00000000000..104b6dd9443
--- /dev/null
+++ b/tests/baselines/reference/missingFunctionImplementation2.js
@@ -0,0 +1,15 @@
+//// [tests/cases/compiler/missingFunctionImplementation2.ts] ////
+
+//// [missingFunctionImplementation2_a.ts]
+export {};
+declare module "./missingFunctionImplementation2_b.ts" {
+  export function f(a, b): void;
+}
+
+//// [missingFunctionImplementation2_b.ts]
+export function f(a?, b?);
+
+//// [missingFunctionImplementation2_a.js]
+"use strict";
+//// [missingFunctionImplementation2_b.js]
+"use strict";
diff --git a/tests/cases/compiler/missingFunctionImplementation.ts b/tests/cases/compiler/missingFunctionImplementation.ts
new file mode 100644
index 00000000000..e261db3a667
--- /dev/null
+++ b/tests/cases/compiler/missingFunctionImplementation.ts
@@ -0,0 +1,79 @@
+
+export class C1 {
+  m(): void;
+}
+
+// merged with a namespace
+export class C2 {
+  m(): void;
+}
+export namespace C2 { }
+
+
+// merged with a namespace, multiple overloads
+class C3 {
+  m(a, b);
+  m(a);
+}
+namespace C3 { }
+
+// static methods, multiple overloads
+class C4 {
+  static m(a): void;
+}
+
+// static methods, multiple overloads
+class C5 {
+  static m(a): void;
+  static m(): void;
+}
+
+// merged with namespace, static methods
+class C6 {
+  static m(): void;
+}
+namespace C6 {
+}
+
+// merged with namespace, static methods, multiple overloads
+class C7 {
+  static m(a): void;
+  static m(): void;
+}
+namespace C7 {
+}
+
+// merged with namespace, static methods, duplicate declarations
+class C8 {
+  static m(a): void;
+  static m(a, b): void;
+}
+namespace C8 {
+  export function m(a?, b?): void { }
+}
+
+// merged with namespace, static methods, duplicate declarations
+class C9 {
+  static m(a): void { }
+}
+namespace C9 {
+  export function m(a): void;
+}
+
+// merged namespaces
+namespace N10 {
+  export function m(a): void;
+}
+namespace N10 {
+  export function m(a): void { }
+}
+
+// merged namespaces, duplicate defintions
+namespace N12 {
+  export function m(a): void;
+  export function m(): void;
+  export function m(a?): void { }
+}
+namespace N12 {
+  export function m(a): void { }
+}
diff --git a/tests/cases/compiler/missingFunctionImplementation2.ts b/tests/cases/compiler/missingFunctionImplementation2.ts
new file mode 100644
index 00000000000..25909b6add4
--- /dev/null
+++ b/tests/cases/compiler/missingFunctionImplementation2.ts
@@ -0,0 +1,8 @@
+// @Filename: missingFunctionImplementation2_a.ts
+export {};
+declare module "./missingFunctionImplementation2_b.ts" {
+  export function f(a, b): void;
+}
+
+// @Filename: missingFunctionImplementation2_b.ts
+export function f(a?, b?);
\ No newline at end of file

From 61534225e558fd905cbc0bc1bfaa98c59a612ab1 Mon Sep 17 00:00:00 2001
From: york yao <yaoao12306@outlook.com>
Date: Mon, 13 Jun 2016 18:48:39 +0800
Subject: [PATCH 262/332] minor fix: add missing return clause

---
 src/compiler/utilities.ts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index bf163b47c05..b4f00917b1f 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -830,6 +830,8 @@ namespace ts {
             case SyntaxKind.ConstructorType:
                 return true;
         }
+
+        return false;
     }
 
     export function introducesArgumentsExoticObject(node: Node) {

From fb050f17f6845215bb32cea5493a274cf741cbf2 Mon Sep 17 00:00:00 2001
From: Yui <yuit@users.noreply.github.com>
Date: Mon, 13 Jun 2016 09:23:37 -0700
Subject: [PATCH 263/332] Use camel-case instead of snake-case (#9134)

---
 src/services/services.ts | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/src/services/services.ts b/src/services/services.ts
index 13df3a54a30..a8b4acdeaf6 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1941,17 +1941,17 @@ namespace ts {
 
 
 
-    let commandLineOptions_stringToEnum: CommandLineOptionOfCustomType[];
+    let commandLineOptionsStringToEnum: CommandLineOptionOfCustomType[];
 
     /** JS users may pass in string values for enum compiler options (such as ModuleKind), so convert. */
     function fixupCompilerOptions(options: CompilerOptions, diagnostics: Diagnostic[]): CompilerOptions {
         // Lazily create this value to fix module loading errors.
-        commandLineOptions_stringToEnum = commandLineOptions_stringToEnum || <CommandLineOptionOfCustomType[]>filter(optionDeclarations, o =>
+        commandLineOptionsStringToEnum = commandLineOptionsStringToEnum || <CommandLineOptionOfCustomType[]>filter(optionDeclarations, o =>
             typeof o.type === "object" && !forEachValue(<Map<any>> o.type, v => typeof v !== "number"));
 
         options = clone(options);
 
-        for (const opt of commandLineOptions_stringToEnum) {
+        for (const opt of commandLineOptionsStringToEnum) {
             if (!hasProperty(options, opt.name)) {
                 continue;
             }

From e8ac1abbd6b3b1b720e39190b74252c76edab043 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Mon, 13 Jun 2016 09:33:49 -0700
Subject: [PATCH 264/332] Baseline fix, CR comments, lint

---
 src/compiler/commandLineParser.ts             |  5 ++--
 src/compiler/program.ts                       |  4 +--
 src/compiler/types.ts                         |  2 +-
 src/server/editorServices.ts                  |  2 +-
 src/services/services.ts                      |  2 +-
 .../reference/library-reference-6.symbols     | 16 ++++++++++
 .../reference/library-reference-6.trace.json  | 30 +++++--------------
 .../reference/library-reference-6.types       | 16 ++++++++++
 .../moduleResolutionWithExtensions.trace.json |  4 +++
 9 files changed, 51 insertions(+), 30 deletions(-)
 create mode 100644 tests/baselines/reference/library-reference-6.symbols
 create mode 100644 tests/baselines/reference/library-reference-6.types

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 74bfdf3e961..9e9fb8e2ee2 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -341,8 +341,9 @@ namespace ts {
             type: "list",
             element: {
                 name: "typeRoots",
-                type: "string"
-            }            
+                type: "string",
+                isFilePath: true
+            }
         },
         {
             name: "types",
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index f6cc048ace6..9cb000a4d61 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -217,9 +217,9 @@ namespace ts {
         // Check primary library paths
         if (typeRoots.length) {
             if (traceEnabled) {
-                trace(host, Diagnostics.Resolving_with_primary_search_path_0, typeRoots.join(', '));
+                trace(host, Diagnostics.Resolving_with_primary_search_path_0, typeRoots.join(", "));
             }
-            const primarySearchPaths = options.typeRoots || defaultTypeRoots;
+            const primarySearchPaths = typeRoots;
             for (const typeRoot of primarySearchPaths) {
                 const candidate = combinePaths(typeRoot, typeReferenceDirectiveName);
                 const candidateDirectory = getDirectoryPath(candidate);
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index d9edd5a76c4..db34bb7c6e8 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2562,7 +2562,7 @@ namespace ts {
         target?: ScriptTarget;
         traceResolution?: boolean;
         types?: string[];
-        // Paths used to used to compute primary types search locations
+        /** Paths used to used to compute primary types search locations */
         typeRoots?: string[];
         typesSearchPaths?: string[];
         /*@internal*/ version?: boolean;
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 53b0c28671f..b887b5c7256 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -316,7 +316,7 @@ namespace ts.server {
         }
 
         getDirectories(path: string): string[] {
-            return this.host.getDirectories ? this.host.getDirectories(path) : [];
+            return this.host.getDirectories(path);
         }
 
         /**
diff --git a/src/services/services.ts b/src/services/services.ts
index 6d29310f93c..ba157afaf9f 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -2141,7 +2141,7 @@ namespace ts {
         const getCanonicalFileName = createGetCanonicalFileName(!!useCaseSensitiveFileNames);
 
         function getKeyForCompilationSettings(settings: CompilerOptions): DocumentRegistryBucketKey {
-            return <DocumentRegistryBucketKey>`_${settings.target}|${settings.module}|${settings.noResolve}|${settings.jsx}|${settings.allowJs}|${settings.baseUrl}|${settings.typeRoots}|${JSON.stringify(settings.rootDirs)}|${JSON.stringify(settings.paths)}`;
+            return <DocumentRegistryBucketKey>`_${settings.target}|${settings.module}|${settings.noResolve}|${settings.jsx}|${settings.allowJs}|${settings.baseUrl}|${JSON.stringify(settings.typeRoots)}|${JSON.stringify(settings.rootDirs)}|${JSON.stringify(settings.paths)}`;
         }
 
         function getBucketForCompilationSettings(key: DocumentRegistryBucketKey, createIfMissing: boolean): FileMap<DocumentRegistryEntry> {
diff --git a/tests/baselines/reference/library-reference-6.symbols b/tests/baselines/reference/library-reference-6.symbols
new file mode 100644
index 00000000000..595d43df3fa
--- /dev/null
+++ b/tests/baselines/reference/library-reference-6.symbols
@@ -0,0 +1,16 @@
+=== /src/foo.ts ===
+/// <reference types="alpha" />
+var x: string = alpha.a;
+>x : Symbol(x, Decl(foo.ts, 1, 3))
+>alpha.a : Symbol(a, Decl(index.d.ts, 3, 20))
+>alpha : Symbol(alpha, Decl(index.d.ts, 3, 11))
+>a : Symbol(a, Decl(index.d.ts, 3, 20))
+
+=== /node_modules/@types/alpha/index.d.ts ===
+
+// The primary lookup folder is relative to tsconfig.json, if present
+
+declare var alpha: { a: string };
+>alpha : Symbol(alpha, Decl(index.d.ts, 3, 11))
+>a : Symbol(a, Decl(index.d.ts, 3, 20))
+
diff --git a/tests/baselines/reference/library-reference-6.trace.json b/tests/baselines/reference/library-reference-6.trace.json
index fc29f3f2478..21843c2ecf4 100644
--- a/tests/baselines/reference/library-reference-6.trace.json
+++ b/tests/baselines/reference/library-reference-6.trace.json
@@ -2,27 +2,11 @@
     "======== Resolving type reference directive 'alpha', containing file '/src/foo.ts', root directory 'node_modules/@types'. ========",
     "Resolving with primary search path 'node_modules/@types'",
     "File 'node_modules/@types/alpha/package.json' does not exist.",
-    "File 'node_modules/@types/alpha/index.d.ts' does not exist.",
-    "Looking up in 'node_modules' folder, initial location '/src'",
-    "File '/src/node_modules/alpha.ts' does not exist.",
-    "File '/src/node_modules/alpha.d.ts' does not exist.",
-    "File '/src/node_modules/alpha/package.json' does not exist.",
-    "File '/src/node_modules/alpha/index.ts' does not exist.",
-    "File '/src/node_modules/alpha/index.d.ts' does not exist.",
-    "File '/src/node_modules/@types/alpha.ts' does not exist.",
-    "File '/src/node_modules/@types/alpha.d.ts' does not exist.",
-    "File '/src/node_modules/@types/alpha/package.json' does not exist.",
-    "File '/src/node_modules/@types/alpha/index.ts' does not exist.",
-    "File '/src/node_modules/@types/alpha/index.d.ts' does not exist.",
-    "File '/node_modules/alpha.ts' does not exist.",
-    "File '/node_modules/alpha.d.ts' does not exist.",
-    "File '/node_modules/alpha/package.json' does not exist.",
-    "File '/node_modules/alpha/index.ts' does not exist.",
-    "File '/node_modules/alpha/index.d.ts' does not exist.",
-    "File '/node_modules/@types/alpha.ts' does not exist.",
-    "File '/node_modules/@types/alpha.d.ts' does not exist.",
-    "File '/node_modules/@types/alpha/package.json' does not exist.",
-    "File '/node_modules/@types/alpha/index.ts' does not exist.",
-    "File '/node_modules/@types/alpha/index.d.ts' does not exist.",
-    "======== Type reference directive 'alpha' was not resolved. ========"
+    "File 'node_modules/@types/alpha/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'alpha' was successfully resolved to 'node_modules/@types/alpha/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'alpha', containing file '/src/__inferred type names__.ts', root directory 'node_modules/@types'. ========",
+    "Resolving with primary search path 'node_modules/@types'",
+    "File 'node_modules/@types/alpha/package.json' does not exist.",
+    "File 'node_modules/@types/alpha/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'alpha' was successfully resolved to 'node_modules/@types/alpha/index.d.ts', primary: true. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/library-reference-6.types b/tests/baselines/reference/library-reference-6.types
new file mode 100644
index 00000000000..e2762c0943a
--- /dev/null
+++ b/tests/baselines/reference/library-reference-6.types
@@ -0,0 +1,16 @@
+=== /src/foo.ts ===
+/// <reference types="alpha" />
+var x: string = alpha.a;
+>x : string
+>alpha.a : string
+>alpha : { a: string; }
+>a : string
+
+=== /node_modules/@types/alpha/index.d.ts ===
+
+// The primary lookup folder is relative to tsconfig.json, if present
+
+declare var alpha: { a: string };
+>alpha : { a: string; }
+>a : string
+
diff --git a/tests/baselines/reference/moduleResolutionWithExtensions.trace.json b/tests/baselines/reference/moduleResolutionWithExtensions.trace.json
index 6e6589d7c1f..7dc9e8c104b 100644
--- a/tests/baselines/reference/moduleResolutionWithExtensions.trace.json
+++ b/tests/baselines/reference/moduleResolutionWithExtensions.trace.json
@@ -3,11 +3,13 @@
     "Module resolution kind is not specified, using 'NodeJs'.",
     "Loading module as file / folder, candidate module location '/src/a'.",
     "File '/src/a.ts' exist - use it as a name resolution result.",
+    "Resolving real path for '/src/a.ts', result '/src/a.ts'",
     "======== Module name './a' was successfully resolved to '/src/a.ts'. ========",
     "======== Resolving module './a.ts' from '/src/c.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
     "Loading module as file / folder, candidate module location '/src/a.ts'.",
     "File '/src/a.ts' exist - use it as a name resolution result.",
+    "Resolving real path for '/src/a.ts', result '/src/a.ts'",
     "======== Module name './a.ts' was successfully resolved to '/src/a.ts'. ========",
     "======== Resolving module './a.js' from '/src/d.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
@@ -17,6 +19,7 @@
     "File '/src/a.js.d.ts' does not exist.",
     "File name '/src/a.js' has a '.js' extension - stripping it",
     "File '/src/a.ts' exist - use it as a name resolution result.",
+    "Resolving real path for '/src/a.ts', result '/src/a.ts'",
     "======== Module name './a.js' was successfully resolved to '/src/a.ts'. ========",
     "======== Resolving module './jquery.js' from '/src/jquery_user_1.ts'. ========",
     "Module resolution kind is not specified, using 'NodeJs'.",
@@ -28,5 +31,6 @@
     "File '/src/jquery.ts' does not exist.",
     "File '/src/jquery.tsx' does not exist.",
     "File '/src/jquery.d.ts' exist - use it as a name resolution result.",
+    "Resolving real path for '/src/jquery.d.ts', result '/src/jquery.d.ts'",
     "======== Module name './jquery.js' was successfully resolved to '/src/jquery.d.ts'. ========"
 ]
\ No newline at end of file

From 6702e651a3e6de28a9a751d2c4282494412a0081 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Mon, 13 Jun 2016 10:15:29 -0700
Subject: [PATCH 265/332] CR changes

---
 src/compiler/program.ts                          |  4 +++-
 .../reference/typingsLookup1.trace.json          | 16 ++++++++++++++++
 .../references/library-reference-6.ts            |  3 ---
 3 files changed, 19 insertions(+), 4 deletions(-)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 9cb000a4d61..59ae0d862ad 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -1031,7 +1031,9 @@ namespace ts {
         // Walk the primary type lookup locations
         let result: string[] = [];
         if (host.directoryExists && host.getDirectories) {
-            for (const root of options.typeRoots || defaultTypeRoots) {
+            const typeRoots = options.typeRoots ||
+                defaultTypeRoots.map(d => combinePaths(options.configFilePath ? getDirectoryPath(options.configFilePath) : host.getCurrentDirectory(), d));
+            for (const root of typeRoots) {
                 if (host.directoryExists(root)) {
                     result = result.concat(host.getDirectories(root));
                 }
diff --git a/tests/baselines/reference/typingsLookup1.trace.json b/tests/baselines/reference/typingsLookup1.trace.json
index 0463c920bd3..ad0354157c3 100644
--- a/tests/baselines/reference/typingsLookup1.trace.json
+++ b/tests/baselines/reference/typingsLookup1.trace.json
@@ -14,5 +14,21 @@
     "File '/node_modules/@types/jquery/package.json' does not exist.",
     "File '/node_modules/@types/jquery/index.ts' does not exist.",
     "File '/node_modules/@types/jquery/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'jquery' was successfully resolved to '/node_modules/@types/jquery/index.d.ts', primary: false. ========",
+    "======== Resolving type reference directive 'jquery', containing file '/__inferred type names__.ts', root directory 'node_modules/@types'. ========",
+    "Resolving with primary search path 'node_modules/@types'",
+    "File 'node_modules/@types/jquery/package.json' does not exist.",
+    "File 'node_modules/@types/jquery/index.d.ts' does not exist.",
+    "Looking up in 'node_modules' folder, initial location '/'",
+    "File '/node_modules/jquery.ts' does not exist.",
+    "File '/node_modules/jquery.d.ts' does not exist.",
+    "File '/node_modules/jquery/package.json' does not exist.",
+    "File '/node_modules/jquery/index.ts' does not exist.",
+    "File '/node_modules/jquery/index.d.ts' does not exist.",
+    "File '/node_modules/@types/jquery.ts' does not exist.",
+    "File '/node_modules/@types/jquery.d.ts' does not exist.",
+    "File '/node_modules/@types/jquery/package.json' does not exist.",
+    "File '/node_modules/@types/jquery/index.ts' does not exist.",
+    "File '/node_modules/@types/jquery/index.d.ts' exist - use it as a name resolution result.",
     "======== Type reference directive 'jquery' was successfully resolved to '/node_modules/@types/jquery/index.d.ts', primary: false. ========"
 ]
\ No newline at end of file
diff --git a/tests/cases/conformance/references/library-reference-6.ts b/tests/cases/conformance/references/library-reference-6.ts
index 765a6760aa4..13ad382e636 100644
--- a/tests/cases/conformance/references/library-reference-6.ts
+++ b/tests/cases/conformance/references/library-reference-6.ts
@@ -13,7 +13,4 @@ var x: string = alpha.a;
 
 // @filename: /tsconfig.json
 {
-	"compilerOptions": {
-		"typesRoot": "types"
-	}
 }

From 89488f83171a0eb9118e825b86410cab88dca4c6 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 13 Jun 2016 12:08:31 -0700
Subject: [PATCH 266/332] Add test for jsdoc in navigation bar

---
 tests/cases/fourslash/navigationBarJsDoc.ts | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 tests/cases/fourslash/navigationBarJsDoc.ts

diff --git a/tests/cases/fourslash/navigationBarJsDoc.ts b/tests/cases/fourslash/navigationBarJsDoc.ts
new file mode 100644
index 00000000000..20a235bce95
--- /dev/null
+++ b/tests/cases/fourslash/navigationBarJsDoc.ts
@@ -0,0 +1,21 @@
+/// <reference path="fourslash.ts"/>
+
+// @Filename: foo.js
+/////** @typedef {(number|string)} NumberLike */
+/////** @typedef {(string|number)} */
+////const x = 0;
+
+verify.navigationBar([
+  {
+    "text": "NumberLike",
+    "kind": "type"
+  },
+  {
+    "text": "x",
+    "kind": "type"
+  },
+  {
+    "text": "x",
+    "kind": "var"
+  }
+]);

From 3dca09b200454af40d9cd4da05f9d74b71e442eb Mon Sep 17 00:00:00 2001
From: Ron Buckton <rbuckton@microsoft.com>
Date: Mon, 13 Jun 2016 12:58:21 -0700
Subject: [PATCH 267/332] Fixes runtests-parallel not reporting failure for
 failed tests.

---
 scripts/mocha-parallel.js | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/scripts/mocha-parallel.js b/scripts/mocha-parallel.js
index cc695729cbd..bf33f68f204 100644
--- a/scripts/mocha-parallel.js
+++ b/scripts/mocha-parallel.js
@@ -193,7 +193,6 @@ function runTests(taskConfigsFolder, run, options, cb) {
         counter--;
 
         if (counter <= 0) {
-            var failed = 0;
             var reporter = new Base(),
                 stats = reporter.stats,
                 failures = reporter.failures;
@@ -224,8 +223,8 @@ function runTests(taskConfigsFolder, run, options, cb) {
                 reporter.epilogue();
             }
 
-            if (failed) {
-                return cb(new Error("Test failures reported: " + failed));
+            if (stats.failures) {
+                return cb(new Error("Test failures reported: " + stats.failures));
             }
             else {
                 return cb();

From c0c707c37f4464356b6408304da5a285fad8b5cf Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 13 Jun 2016 12:57:00 -0700
Subject: [PATCH 268/332] Fix decorator metadata emit for rest arg with no type

---
 src/compiler/emitter.ts                       |  4 +-
 .../emitDecoratorMetadata_restArgs.js         | 80 +++++++++++++++++++
 .../emitDecoratorMetadata_restArgs.symbols    | 44 ++++++++++
 .../emitDecoratorMetadata_restArgs.types      | 44 ++++++++++
 .../emitDecoratorMetadata_restArgs.ts         | 20 +++++
 5 files changed, 190 insertions(+), 2 deletions(-)
 create mode 100644 tests/baselines/reference/emitDecoratorMetadata_restArgs.js
 create mode 100644 tests/baselines/reference/emitDecoratorMetadata_restArgs.symbols
 create mode 100644 tests/baselines/reference/emitDecoratorMetadata_restArgs.types
 create mode 100644 tests/cases/compiler/emitDecoratorMetadata_restArgs.ts

diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index 46362bd7827..e3f092257a3 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -6133,10 +6133,10 @@ const _super = (function (geti, seti) {
 
                                 if (parameters[i].dotDotDotToken) {
                                     let parameterType = parameters[i].type;
-                                    if (parameterType.kind === SyntaxKind.ArrayType) {
+                                    if (parameterType && parameterType.kind === SyntaxKind.ArrayType) {
                                         parameterType = (<ArrayTypeNode>parameterType).elementType;
                                     }
-                                    else if (parameterType.kind === SyntaxKind.TypeReference && (<TypeReferenceNode>parameterType).typeArguments && (<TypeReferenceNode>parameterType).typeArguments.length === 1) {
+                                    else if (parameterType && parameterType.kind === SyntaxKind.TypeReference && (<TypeReferenceNode>parameterType).typeArguments && (<TypeReferenceNode>parameterType).typeArguments.length === 1) {
                                         parameterType = (<TypeReferenceNode>parameterType).typeArguments[0];
                                     }
                                     else {
diff --git a/tests/baselines/reference/emitDecoratorMetadata_restArgs.js b/tests/baselines/reference/emitDecoratorMetadata_restArgs.js
new file mode 100644
index 00000000000..35350c54e0a
--- /dev/null
+++ b/tests/baselines/reference/emitDecoratorMetadata_restArgs.js
@@ -0,0 +1,80 @@
+//// [emitDecoratorMetadata_restArgs.ts]
+
+declare const MyClassDecorator: ClassDecorator;
+declare const MyMethodDecorator: MethodDecorator;
+
+@MyClassDecorator
+class A {
+    constructor(...args) {}
+    @MyMethodDecorator
+    method(...args) {}
+}
+
+@MyClassDecorator
+class B {
+    constructor(...args: number[]) {}
+    @MyMethodDecorator
+    method(...args: string[]) {}
+}
+
+
+//// [emitDecoratorMetadata_restArgs.js]
+var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+};
+var __metadata = (this && this.__metadata) || function (k, v) {
+    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
+};
+var A = (function () {
+    function A() {
+        var args = [];
+        for (var _i = 0; _i < arguments.length; _i++) {
+            args[_i - 0] = arguments[_i];
+        }
+    }
+    A.prototype.method = function () {
+        var args = [];
+        for (var _i = 0; _i < arguments.length; _i++) {
+            args[_i - 0] = arguments[_i];
+        }
+    };
+    __decorate([
+        MyMethodDecorator, 
+        __metadata('design:type', Function), 
+        __metadata('design:paramtypes', [Object]), 
+        __metadata('design:returntype', void 0)
+    ], A.prototype, "method", null);
+    A = __decorate([
+        MyClassDecorator, 
+        __metadata('design:paramtypes', [Object])
+    ], A);
+    return A;
+}());
+var B = (function () {
+    function B() {
+        var args = [];
+        for (var _i = 0; _i < arguments.length; _i++) {
+            args[_i - 0] = arguments[_i];
+        }
+    }
+    B.prototype.method = function () {
+        var args = [];
+        for (var _i = 0; _i < arguments.length; _i++) {
+            args[_i - 0] = arguments[_i];
+        }
+    };
+    __decorate([
+        MyMethodDecorator, 
+        __metadata('design:type', Function), 
+        __metadata('design:paramtypes', [String]), 
+        __metadata('design:returntype', void 0)
+    ], B.prototype, "method", null);
+    B = __decorate([
+        MyClassDecorator, 
+        __metadata('design:paramtypes', [Number])
+    ], B);
+    return B;
+}());
diff --git a/tests/baselines/reference/emitDecoratorMetadata_restArgs.symbols b/tests/baselines/reference/emitDecoratorMetadata_restArgs.symbols
new file mode 100644
index 00000000000..b665b778f86
--- /dev/null
+++ b/tests/baselines/reference/emitDecoratorMetadata_restArgs.symbols
@@ -0,0 +1,44 @@
+=== tests/cases/compiler/emitDecoratorMetadata_restArgs.ts ===
+
+declare const MyClassDecorator: ClassDecorator;
+>MyClassDecorator : Symbol(MyClassDecorator, Decl(emitDecoratorMetadata_restArgs.ts, 1, 13))
+>ClassDecorator : Symbol(ClassDecorator, Decl(lib.d.ts, --, --))
+
+declare const MyMethodDecorator: MethodDecorator;
+>MyMethodDecorator : Symbol(MyMethodDecorator, Decl(emitDecoratorMetadata_restArgs.ts, 2, 13))
+>MethodDecorator : Symbol(MethodDecorator, Decl(lib.d.ts, --, --))
+
+@MyClassDecorator
+>MyClassDecorator : Symbol(MyClassDecorator, Decl(emitDecoratorMetadata_restArgs.ts, 1, 13))
+
+class A {
+>A : Symbol(A, Decl(emitDecoratorMetadata_restArgs.ts, 2, 49))
+
+    constructor(...args) {}
+>args : Symbol(args, Decl(emitDecoratorMetadata_restArgs.ts, 6, 16))
+
+    @MyMethodDecorator
+>MyMethodDecorator : Symbol(MyMethodDecorator, Decl(emitDecoratorMetadata_restArgs.ts, 2, 13))
+
+    method(...args) {}
+>method : Symbol(A.method, Decl(emitDecoratorMetadata_restArgs.ts, 6, 27))
+>args : Symbol(args, Decl(emitDecoratorMetadata_restArgs.ts, 8, 11))
+}
+
+@MyClassDecorator
+>MyClassDecorator : Symbol(MyClassDecorator, Decl(emitDecoratorMetadata_restArgs.ts, 1, 13))
+
+class B {
+>B : Symbol(B, Decl(emitDecoratorMetadata_restArgs.ts, 9, 1))
+
+    constructor(...args: number[]) {}
+>args : Symbol(args, Decl(emitDecoratorMetadata_restArgs.ts, 13, 16))
+
+    @MyMethodDecorator
+>MyMethodDecorator : Symbol(MyMethodDecorator, Decl(emitDecoratorMetadata_restArgs.ts, 2, 13))
+
+    method(...args: string[]) {}
+>method : Symbol(B.method, Decl(emitDecoratorMetadata_restArgs.ts, 13, 37))
+>args : Symbol(args, Decl(emitDecoratorMetadata_restArgs.ts, 15, 11))
+}
+
diff --git a/tests/baselines/reference/emitDecoratorMetadata_restArgs.types b/tests/baselines/reference/emitDecoratorMetadata_restArgs.types
new file mode 100644
index 00000000000..4820d3a7d8d
--- /dev/null
+++ b/tests/baselines/reference/emitDecoratorMetadata_restArgs.types
@@ -0,0 +1,44 @@
+=== tests/cases/compiler/emitDecoratorMetadata_restArgs.ts ===
+
+declare const MyClassDecorator: ClassDecorator;
+>MyClassDecorator : <TFunction extends Function>(target: TFunction) => TFunction | void
+>ClassDecorator : <TFunction extends Function>(target: TFunction) => TFunction | void
+
+declare const MyMethodDecorator: MethodDecorator;
+>MyMethodDecorator : <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void
+>MethodDecorator : <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void
+
+@MyClassDecorator
+>MyClassDecorator : <TFunction extends Function>(target: TFunction) => TFunction | void
+
+class A {
+>A : A
+
+    constructor(...args) {}
+>args : any[]
+
+    @MyMethodDecorator
+>MyMethodDecorator : <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void
+
+    method(...args) {}
+>method : (...args: any[]) => void
+>args : any[]
+}
+
+@MyClassDecorator
+>MyClassDecorator : <TFunction extends Function>(target: TFunction) => TFunction | void
+
+class B {
+>B : B
+
+    constructor(...args: number[]) {}
+>args : number[]
+
+    @MyMethodDecorator
+>MyMethodDecorator : <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void
+
+    method(...args: string[]) {}
+>method : (...args: string[]) => void
+>args : string[]
+}
+
diff --git a/tests/cases/compiler/emitDecoratorMetadata_restArgs.ts b/tests/cases/compiler/emitDecoratorMetadata_restArgs.ts
new file mode 100644
index 00000000000..6b0741e2205
--- /dev/null
+++ b/tests/cases/compiler/emitDecoratorMetadata_restArgs.ts
@@ -0,0 +1,20 @@
+// @experimentaldecorators: true
+// @emitdecoratormetadata: true
+// @target: ES5
+
+declare const MyClassDecorator: ClassDecorator;
+declare const MyMethodDecorator: MethodDecorator;
+
+@MyClassDecorator
+class A {
+    constructor(...args) {}
+    @MyMethodDecorator
+    method(...args) {}
+}
+
+@MyClassDecorator
+class B {
+    constructor(...args: number[]) {}
+    @MyMethodDecorator
+    method(...args: string[]) {}
+}

From 5a7f7469eae853cbe9c21612e8e4d64324d3d5da Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Mon, 13 Jun 2016 13:21:47 -0700
Subject: [PATCH 269/332] Add isDefinition to ReferenceEntry

Clients can now easily tell if the reference is to a definition or a
usage.
---
 src/server/client.ts     | 1 +
 src/server/protocol.d.ts | 5 +++++
 src/server/session.ts    | 5 +++--
 src/services/services.ts | 7 +++++--
 src/services/shims.ts    | 4 ++--
 5 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/src/server/client.ts b/src/server/client.ts
index b0a1a8ec9e9..ea6c948c4fb 100644
--- a/src/server/client.ts
+++ b/src/server/client.ts
@@ -376,6 +376,7 @@ namespace ts.server {
                     fileName: fileName,
                     textSpan: ts.createTextSpanFromBounds(start, end),
                     isWriteAccess: entry.isWriteAccess,
+                    isDefinition: entry.isDefinition,
                 };
             });
         }
diff --git a/src/server/protocol.d.ts b/src/server/protocol.d.ts
index d2c15b308ec..dd29411f97d 100644
--- a/src/server/protocol.d.ts
+++ b/src/server/protocol.d.ts
@@ -304,6 +304,11 @@ declare namespace ts.server.protocol {
           * True if reference is a write location, false otherwise.
           */
         isWriteAccess: boolean;
+
+        /**
+         * True if reference is a definition, false otherwise.
+         */
+        isDefinition?: boolean;
     }
 
     /**
diff --git a/src/server/session.ts b/src/server/session.ts
index 0ec3d87e58c..2964dc66505 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -379,7 +379,7 @@ namespace ts.server {
                     start,
                     end,
                     file: fileName,
-                    isWriteAccess
+                    isWriteAccess,
                 };
             });
         }
@@ -555,7 +555,8 @@ namespace ts.server {
                             start: start,
                             lineText: lineText,
                             end: compilerService.host.positionToLineOffset(ref.fileName, ts.textSpanEnd(ref.textSpan)),
-                            isWriteAccess: ref.isWriteAccess
+                            isWriteAccess: ref.isWriteAccess,
+                            isDefinition: ref.isDefinition
                         };
                     });
                 },
diff --git a/src/services/services.ts b/src/services/services.ts
index 13df3a54a30..5e1b69170a5 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1208,6 +1208,7 @@ namespace ts {
         textSpan: TextSpan;
         fileName: string;
         isWriteAccess: boolean;
+        isDefinition?: boolean;
     }
 
     export interface DocumentHighlights {
@@ -6183,7 +6184,8 @@ namespace ts {
                                     references: [{
                                         fileName: sourceFile.fileName,
                                         textSpan: createTextSpan(position, searchText.length),
-                                        isWriteAccess: false
+                                        isWriteAccess: false,
+                                        isDefinition: false
                                     }]
                                 });
                             }
@@ -6737,7 +6739,8 @@ namespace ts {
             return {
                 fileName: node.getSourceFile().fileName,
                 textSpan: createTextSpanFromBounds(start, end),
-                isWriteAccess: isWriteAccess(node)
+                isWriteAccess: isWriteAccess(node),
+                isDefinition: isDeclarationName(node)
             };
         }
 
diff --git a/src/services/shims.ts b/src/services/shims.ts
index 94ff3367e3c..96392ca42be 100644
--- a/src/services/shims.ts
+++ b/src/services/shims.ts
@@ -164,7 +164,7 @@ namespace ts {
 
         /**
          * Returns a JSON-encoded value of the type:
-         * { fileName: string; textSpan: { start: number; length: number}; isWriteAccess: boolean }[]
+         * { fileName: string; textSpan: { start: number; length: number}; isWriteAccess: boolean, isDefinition?: boolean }[]
          */
         getReferencesAtPosition(fileName: string, position: number): string;
 
@@ -1141,4 +1141,4 @@ namespace TypeScript.Services {
 /* @internal */
 const toolsVersion = "1.9";
 
-/* tslint:enable:no-unused-variable */
\ No newline at end of file
+/* tslint:enable:no-unused-variable */

From ac9e617e5e1cab0e3cdd1fd9cc1d855e72df49dc Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Mon, 13 Jun 2016 13:23:32 -0700
Subject: [PATCH 270/332] Test isDefinition

---
 src/harness/fourslash.ts                      | 11 +++++----
 tests/cases/fourslash/fourslash.ts            |  2 +-
 ...tOccurrencesIsDefinitionOfArrowFunction.ts |  8 +++++++
 .../getOccurrencesIsDefinitionOfClass.ts      | 13 +++++++++++
 .../getOccurrencesIsDefinitionOfEnum.ts       | 11 +++++++++
 .../getOccurrencesIsDefinitionOfFunction.ts   |  9 ++++++++
 .../getOccurrencesIsDefinitionOfInterface.ts  | 10 ++++++++
 ...rencesIsDefinitionOfInterfaceClassMerge.ts | 19 +++++++++++++++
 .../getOccurrencesIsDefinitionOfNamespace.ts  | 10 ++++++++
 .../getOccurrencesIsDefinitionOfParameter.ts  |  9 ++++++++
 .../getOccurrencesIsDefinitionOfTypeAlias.ts  |  8 +++++++
 .../getOccurrencesIsDefinitionOfVariable.ts   | 23 +++++++++++++++++++
 12 files changed, 128 insertions(+), 5 deletions(-)
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfArrowFunction.ts
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfClass.ts
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfEnum.ts
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfFunction.ts
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfInterface.ts
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfInterfaceClassMerge.ts
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfNamespace.ts
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfParameter.ts
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfTypeAlias.ts
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfVariable.ts

diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index c05fca5bb47..d852a0b84f3 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -728,7 +728,7 @@ namespace FourSlash {
             }
         }
 
-        public verifyReferencesAtPositionListContains(fileName: string, start: number, end: number, isWriteAccess?: boolean) {
+        public verifyReferencesAtPositionListContains(fileName: string, start: number, end: number, isWriteAccess?: boolean, isDefinition?: boolean) {
             const references = this.getReferencesAtCaret();
 
             if (!references || references.length === 0) {
@@ -741,11 +741,14 @@ namespace FourSlash {
                     if (typeof isWriteAccess !== "undefined" && reference.isWriteAccess !== isWriteAccess) {
                         this.raiseError(`verifyReferencesAtPositionListContains failed - item isWriteAccess value does not match, actual: ${reference.isWriteAccess}, expected: ${isWriteAccess}.`);
                     }
+                    if (typeof isDefinition !== "undefined" && reference.isDefinition !== isDefinition) {
+                        this.raiseError(`verifyReferencesAtPositionListContains failed - item isDefinition value does not match, actual: ${reference.isDefinition}, expected: ${isDefinition}.`);
+                    }
                     return;
                 }
             }
 
-            const missingItem = { fileName: fileName, start: start, end: end, isWriteAccess: isWriteAccess };
+            const missingItem = { fileName, start, end, isWriteAccess, isDefinition };
             this.raiseError(`verifyReferencesAtPositionListContains failed - could not find the item: ${stringify(missingItem)} in the returned list: (${stringify(references)})`);
         }
 
@@ -2835,8 +2838,8 @@ namespace FourSlashInterface {
             this.state.verifyReferencesCountIs(count, /*localFilesOnly*/ false);
         }
 
-        public referencesAtPositionContains(range: FourSlash.Range, isWriteAccess?: boolean) {
-            this.state.verifyReferencesAtPositionListContains(range.fileName, range.start, range.end, isWriteAccess);
+        public referencesAtPositionContains(range: FourSlash.Range, isWriteAccess?: boolean, isDefinition?: boolean) {
+            this.state.verifyReferencesAtPositionListContains(range.fileName, range.start, range.end, isWriteAccess, isDefinition);
         }
 
         public signatureHelpPresent() {
diff --git a/tests/cases/fourslash/fourslash.ts b/tests/cases/fourslash/fourslash.ts
index 540a6503138..78de5b02358 100644
--- a/tests/cases/fourslash/fourslash.ts
+++ b/tests/cases/fourslash/fourslash.ts
@@ -125,7 +125,7 @@ declare namespace FourSlashInterface {
         completionListAllowsNewIdentifier(): void;
         memberListIsEmpty(): void;
         referencesCountIs(count: number): void;
-        referencesAtPositionContains(range: Range, isWriteAccess?: boolean): void;
+        referencesAtPositionContains(range: Range, isWriteAccess?: boolean, isDefinition?: boolean): void;
         signatureHelpPresent(): void;
         errorExistsBetweenMarkers(startMarker: string, endMarker: string): void;
         errorExistsAfterMarker(markerName?: string): void;
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfArrowFunction.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfArrowFunction.ts
new file mode 100644
index 00000000000..eb9980c946d
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfArrowFunction.ts
@@ -0,0 +1,8 @@
+/// <reference path='fourslash.ts' />
+////var [|{| "isDefinition": true |}f|] = x => x + 1;
+////[|{| "isDefinition": false |}f|](12);
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfClass.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfClass.ts
new file mode 100644
index 00000000000..04b1f90681a
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfClass.ts
@@ -0,0 +1,13 @@
+/// <reference path='fourslash.ts' />
+////class [|{| "isDefinition": true |}C|] {
+////    n: number;
+////    constructor() {
+////        this.n = 12;
+////    }
+////}
+////let c = new [|{| "isDefinition": false |}C|]();
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfEnum.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfEnum.ts
new file mode 100644
index 00000000000..a5764206bce
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfEnum.ts
@@ -0,0 +1,11 @@
+/// <reference path='fourslash.ts' />
+////enum [|{| "isDefinition": true |}E|] {
+////    First,
+////    Second
+////}
+////let first = [|{| "isDefinition": false |}E|].First;
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfFunction.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfFunction.ts
new file mode 100644
index 00000000000..456d953092d
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfFunction.ts
@@ -0,0 +1,9 @@
+/// <reference path='fourslash.ts' />
+////function [|{| "isDefinition": true |}func|](x: number) {
+////}
+////[|{| "isDefinition": false |}func|](x)
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterface.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterface.ts
new file mode 100644
index 00000000000..51d1e858185
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterface.ts
@@ -0,0 +1,10 @@
+/// <reference path='fourslash.ts' />
+////interface [|{| "isDefinition": true |}I|] {
+////    p: number;
+////}
+////let i: [|{| "isDefinition": false |}I|] = { p: 12 };
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterfaceClassMerge.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterfaceClassMerge.ts
new file mode 100644
index 00000000000..7efefa17a4b
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterfaceClassMerge.ts
@@ -0,0 +1,19 @@
+/// <reference path='fourslash.ts' />
+////interface [|{| "isDefinition": true |}Numbers|] {
+////    p: number;
+////}
+////interface [|{| "isDefinition": true |}Numbers|] {
+////    m: number;
+////}
+////class [|{| "isDefinition": true |}Numbers|] {
+////    f(n: number) {
+////        return this.p + this.m + n;
+////    }
+////}
+////let i: [|{| "isDefinition": false |}Numbers|] = new [|{| "isDefinition": false |}Numbers|]();
+////let x = i.f(i.p + i.m);
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfNamespace.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfNamespace.ts
new file mode 100644
index 00000000000..86b92ec9ce7
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfNamespace.ts
@@ -0,0 +1,10 @@
+/// <reference path='fourslash.ts' />
+////namespace [|{| "isDefinition": true |}Numbers|] {
+////    export var n = 12;
+////}
+////let x = [|{| "isDefinition": false |}Numbers|].n + 1;
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfParameter.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfParameter.ts
new file mode 100644
index 00000000000..cdb0e281d53
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfParameter.ts
@@ -0,0 +1,9 @@
+/// <reference path='fourslash.ts' />
+////function f([|{| "isDefinition": true |}x|]: number) {
+////  return [|{| "isDefinition": false |}x|] + 1
+////}
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfTypeAlias.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfTypeAlias.ts
new file mode 100644
index 00000000000..44a7c64a93a
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfTypeAlias.ts
@@ -0,0 +1,8 @@
+/// <reference path='fourslash.ts' />
+////type [|{| "isDefinition": true |}Alias|]= number;
+////let n: [|{| "isDefinition": false |}Alias|] = 12;
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfVariable.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfVariable.ts
new file mode 100644
index 00000000000..8d046c67e3a
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfVariable.ts
@@ -0,0 +1,23 @@
+/// <reference path='fourslash.ts' />
+////var [|{| "isDefinition": true |}x|] = 0;
+////var assignmentRightHandSide = [|{| "isDefinition": false |}x|];
+////var assignmentRightHandSide2 = 1 + [|{| "isDefinition": false |}x|];
+////
+////[|{| "isDefinition": false |}x|] = 1;
+////[|{| "isDefinition": false |}x|] = [|{| "isDefinition": false |}x|] + [|{| "isDefinition": false |}x|];
+////
+////[|{| "isDefinition": false |}x|] == 1;
+////[|{| "isDefinition": false |}x|] <= 1;
+////
+////var preIncrement = ++[|{| "isDefinition": false |}x|];
+////var postIncrement = [|{| "isDefinition": false |}x|]++;
+////var preDecrement = --[|{| "isDefinition": false |}x|];
+////var postDecrement = [|{| "isDefinition": false |}x|]--;
+////
+////[|{| "isDefinition": false |}x|] += 1;
+////[|{| "isDefinition": false |}x|] <<= 1;
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});

From 7d31bcf87b48309621525746c2bdc977f87d75a5 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 13 Jun 2016 13:35:37 -0700
Subject: [PATCH 271/332] Add option to bail out of `jake runtests` when one
 test fails

---
 Jakefile.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/Jakefile.js b/Jakefile.js
index df8edc7dded..dc0585d3b1c 100644
--- a/Jakefile.js
+++ b/Jakefile.js
@@ -754,13 +754,14 @@ function runConsoleTests(defaultReporter, runInParallel) {
     colors = process.env.colors || process.env.color;
     colors = colors ? ' --no-colors ' : ' --colors ';
     reporter = process.env.reporter || process.env.r || defaultReporter;
+    var bail = (process.env.bail || process.env.b) ? "--bail" : "";
     var lintFlag = process.env.lint !== 'false';
 
     // timeout normally isn't necessary but Travis-CI has been timing out on compiler baselines occasionally
     // default timeout is 2sec which really should be enough, but maybe we just need a small amount longer
     if(!runInParallel) {
         tests = tests ? ' -g "' + tests + '"' : '';
-        var cmd = "mocha" + (debug ? " --debug-brk" : "") + " -R " + reporter + tests + colors + ' -t ' + testTimeout + ' ' + run;
+        var cmd = "mocha" + (debug ? " --debug-brk" : "") + " -R " + reporter + tests + colors + bail + ' -t ' + testTimeout + ' ' + run;
         console.log(cmd);
 
         var savedNodeEnv = process.env.NODE_ENV;
@@ -825,7 +826,7 @@ task("runtests-parallel", ["build-rules", "tests", builtLocalDirectory], functio
     runConsoleTests('min', /*runInParallel*/ true);
 }, {async: true});
 
-desc("Runs the tests using the built run.js file. Optional arguments are: t[ests]=regex r[eporter]=[list|spec|json|<more>] d[ebug]=true color[s]=false lint=true.");
+desc("Runs the tests using the built run.js file. Optional arguments are: t[ests]=regex r[eporter]=[list|spec|json|<more>] d[ebug]=true color[s]=false lint=true bail=false.");
 task("runtests", ["build-rules", "tests", builtLocalDirectory], function() {
     runConsoleTests('mocha-fivemat-progress-reporter', /*runInParallel*/ false);
 }, {async: true});

From b10d93291fb6b3a7087bff1e93b39ccbb6b4099a Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Mon, 13 Jun 2016 14:20:31 -0700
Subject: [PATCH 272/332] Absolute-ify paths in both places

---
 src/compiler/program.ts                       |  3 +-
 .../reference/library-reference-11.trace.json |  8 ++---
 .../reference/library-reference-12.trace.json |  8 ++---
 .../reference/library-reference-3.trace.json  |  8 ++---
 .../reference/library-reference-6.trace.json  | 20 +++++------
 .../reference/library-reference-7.trace.json  |  8 ++---
 .../reference/typingsLookup1.trace.json       | 34 ++++---------------
 7 files changed, 34 insertions(+), 55 deletions(-)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 59ae0d862ad..28dd6275143 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -192,7 +192,8 @@ namespace ts {
             traceEnabled
         };
 
-        const typeRoots = options.typeRoots || defaultTypeRoots;
+        const typeRoots = options.typeRoots ||
+            defaultTypeRoots.map(d => combinePaths(options.configFilePath ? getDirectoryPath(options.configFilePath) : host.getCurrentDirectory(), d));
         if (traceEnabled) {
             if (containingFile === undefined) {
                 if (typeRoots === undefined) {
diff --git a/tests/baselines/reference/library-reference-11.trace.json b/tests/baselines/reference/library-reference-11.trace.json
index 7f6a32a0b23..365fe3ce72d 100644
--- a/tests/baselines/reference/library-reference-11.trace.json
+++ b/tests/baselines/reference/library-reference-11.trace.json
@@ -1,8 +1,8 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory 'node_modules/@types'. ========",
-    "Resolving with primary search path 'node_modules/@types'",
-    "File 'node_modules/@types/jquery/package.json' does not exist.",
-    "File 'node_modules/@types/jquery/index.d.ts' does not exist.",
+    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory '/node_modules/@types'. ========",
+    "Resolving with primary search path '/node_modules/@types'",
+    "File '/node_modules/@types/jquery/package.json' does not exist.",
+    "File '/node_modules/@types/jquery/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/a/b'",
     "File '/a/b/node_modules/jquery.ts' does not exist.",
     "File '/a/b/node_modules/jquery.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-12.trace.json b/tests/baselines/reference/library-reference-12.trace.json
index b3debaec9d6..84144f82729 100644
--- a/tests/baselines/reference/library-reference-12.trace.json
+++ b/tests/baselines/reference/library-reference-12.trace.json
@@ -1,8 +1,8 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory 'node_modules/@types'. ========",
-    "Resolving with primary search path 'node_modules/@types'",
-    "File 'node_modules/@types/jquery/package.json' does not exist.",
-    "File 'node_modules/@types/jquery/index.d.ts' does not exist.",
+    "======== Resolving type reference directive 'jquery', containing file '/a/b/consumer.ts', root directory '/node_modules/@types'. ========",
+    "Resolving with primary search path '/node_modules/@types'",
+    "File '/node_modules/@types/jquery/package.json' does not exist.",
+    "File '/node_modules/@types/jquery/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/a/b'",
     "File '/a/b/node_modules/jquery.ts' does not exist.",
     "File '/a/b/node_modules/jquery.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-3.trace.json b/tests/baselines/reference/library-reference-3.trace.json
index 909e42140c8..730835c65e9 100644
--- a/tests/baselines/reference/library-reference-3.trace.json
+++ b/tests/baselines/reference/library-reference-3.trace.json
@@ -1,8 +1,8 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/src/consumer.ts', root directory 'node_modules/@types'. ========",
-    "Resolving with primary search path 'node_modules/@types'",
-    "File 'node_modules/@types/jquery/package.json' does not exist.",
-    "File 'node_modules/@types/jquery/index.d.ts' does not exist.",
+    "======== Resolving type reference directive 'jquery', containing file '/src/consumer.ts', root directory '/src/node_modules/@types'. ========",
+    "Resolving with primary search path '/src/node_modules/@types'",
+    "File '/src/node_modules/@types/jquery/package.json' does not exist.",
+    "File '/src/node_modules/@types/jquery/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/src'",
     "File '/src/node_modules/jquery.ts' does not exist.",
     "File '/src/node_modules/jquery.d.ts' does not exist.",
diff --git a/tests/baselines/reference/library-reference-6.trace.json b/tests/baselines/reference/library-reference-6.trace.json
index 21843c2ecf4..48fb49e6c7f 100644
--- a/tests/baselines/reference/library-reference-6.trace.json
+++ b/tests/baselines/reference/library-reference-6.trace.json
@@ -1,12 +1,12 @@
 [
-    "======== Resolving type reference directive 'alpha', containing file '/src/foo.ts', root directory 'node_modules/@types'. ========",
-    "Resolving with primary search path 'node_modules/@types'",
-    "File 'node_modules/@types/alpha/package.json' does not exist.",
-    "File 'node_modules/@types/alpha/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'alpha' was successfully resolved to 'node_modules/@types/alpha/index.d.ts', primary: true. ========",
-    "======== Resolving type reference directive 'alpha', containing file '/src/__inferred type names__.ts', root directory 'node_modules/@types'. ========",
-    "Resolving with primary search path 'node_modules/@types'",
-    "File 'node_modules/@types/alpha/package.json' does not exist.",
-    "File 'node_modules/@types/alpha/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'alpha' was successfully resolved to 'node_modules/@types/alpha/index.d.ts', primary: true. ========"
+    "======== Resolving type reference directive 'alpha', containing file '/src/foo.ts', root directory '/node_modules/@types'. ========",
+    "Resolving with primary search path '/node_modules/@types'",
+    "File '/node_modules/@types/alpha/package.json' does not exist.",
+    "File '/node_modules/@types/alpha/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'alpha' was successfully resolved to '/node_modules/@types/alpha/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'alpha', containing file '/src/__inferred type names__.ts', root directory '/node_modules/@types'. ========",
+    "Resolving with primary search path '/node_modules/@types'",
+    "File '/node_modules/@types/alpha/package.json' does not exist.",
+    "File '/node_modules/@types/alpha/index.d.ts' exist - use it as a name resolution result.",
+    "======== Type reference directive 'alpha' was successfully resolved to '/node_modules/@types/alpha/index.d.ts', primary: true. ========"
 ]
\ No newline at end of file
diff --git a/tests/baselines/reference/library-reference-7.trace.json b/tests/baselines/reference/library-reference-7.trace.json
index 909e42140c8..b681ea312a8 100644
--- a/tests/baselines/reference/library-reference-7.trace.json
+++ b/tests/baselines/reference/library-reference-7.trace.json
@@ -1,8 +1,8 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/src/consumer.ts', root directory 'node_modules/@types'. ========",
-    "Resolving with primary search path 'node_modules/@types'",
-    "File 'node_modules/@types/jquery/package.json' does not exist.",
-    "File 'node_modules/@types/jquery/index.d.ts' does not exist.",
+    "======== Resolving type reference directive 'jquery', containing file '/src/consumer.ts', root directory '/node_modules/@types'. ========",
+    "Resolving with primary search path '/node_modules/@types'",
+    "File '/node_modules/@types/jquery/package.json' does not exist.",
+    "File '/node_modules/@types/jquery/index.d.ts' does not exist.",
     "Looking up in 'node_modules' folder, initial location '/src'",
     "File '/src/node_modules/jquery.ts' does not exist.",
     "File '/src/node_modules/jquery.d.ts' does not exist.",
diff --git a/tests/baselines/reference/typingsLookup1.trace.json b/tests/baselines/reference/typingsLookup1.trace.json
index ad0354157c3..83b0e91d6c7 100644
--- a/tests/baselines/reference/typingsLookup1.trace.json
+++ b/tests/baselines/reference/typingsLookup1.trace.json
@@ -1,34 +1,12 @@
 [
-    "======== Resolving type reference directive 'jquery', containing file '/a.ts', root directory 'node_modules/@types'. ========",
-    "Resolving with primary search path 'node_modules/@types'",
-    "File 'node_modules/@types/jquery/package.json' does not exist.",
-    "File 'node_modules/@types/jquery/index.d.ts' does not exist.",
-    "Looking up in 'node_modules' folder, initial location '/'",
-    "File '/node_modules/jquery.ts' does not exist.",
-    "File '/node_modules/jquery.d.ts' does not exist.",
-    "File '/node_modules/jquery/package.json' does not exist.",
-    "File '/node_modules/jquery/index.ts' does not exist.",
-    "File '/node_modules/jquery/index.d.ts' does not exist.",
-    "File '/node_modules/@types/jquery.ts' does not exist.",
-    "File '/node_modules/@types/jquery.d.ts' does not exist.",
+    "======== Resolving type reference directive 'jquery', containing file '/a.ts', root directory '/node_modules/@types'. ========",
+    "Resolving with primary search path '/node_modules/@types'",
     "File '/node_modules/@types/jquery/package.json' does not exist.",
-    "File '/node_modules/@types/jquery/index.ts' does not exist.",
     "File '/node_modules/@types/jquery/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'jquery' was successfully resolved to '/node_modules/@types/jquery/index.d.ts', primary: false. ========",
-    "======== Resolving type reference directive 'jquery', containing file '/__inferred type names__.ts', root directory 'node_modules/@types'. ========",
-    "Resolving with primary search path 'node_modules/@types'",
-    "File 'node_modules/@types/jquery/package.json' does not exist.",
-    "File 'node_modules/@types/jquery/index.d.ts' does not exist.",
-    "Looking up in 'node_modules' folder, initial location '/'",
-    "File '/node_modules/jquery.ts' does not exist.",
-    "File '/node_modules/jquery.d.ts' does not exist.",
-    "File '/node_modules/jquery/package.json' does not exist.",
-    "File '/node_modules/jquery/index.ts' does not exist.",
-    "File '/node_modules/jquery/index.d.ts' does not exist.",
-    "File '/node_modules/@types/jquery.ts' does not exist.",
-    "File '/node_modules/@types/jquery.d.ts' does not exist.",
+    "======== Type reference directive 'jquery' was successfully resolved to '/node_modules/@types/jquery/index.d.ts', primary: true. ========",
+    "======== Resolving type reference directive 'jquery', containing file '/__inferred type names__.ts', root directory '/node_modules/@types'. ========",
+    "Resolving with primary search path '/node_modules/@types'",
     "File '/node_modules/@types/jquery/package.json' does not exist.",
-    "File '/node_modules/@types/jquery/index.ts' does not exist.",
     "File '/node_modules/@types/jquery/index.d.ts' exist - use it as a name resolution result.",
-    "======== Type reference directive 'jquery' was successfully resolved to '/node_modules/@types/jquery/index.d.ts', primary: false. ========"
+    "======== Type reference directive 'jquery' was successfully resolved to '/node_modules/@types/jquery/index.d.ts', primary: true. ========"
 ]
\ No newline at end of file

From ce156460eb85e1b5a4e45bd55535fa860a6262a4 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 13 Jun 2016 14:29:04 -0700
Subject: [PATCH 273/332] Narrow type in case/default sections in switch on
 discriminant property

---
 src/compiler/binder.ts  | 54 +++++++++++++++++++++++---------------
 src/compiler/checker.ts | 58 +++++++++++++++++++++++++++++++++++++++++
 src/compiler/types.ts   | 13 +++++++--
 3 files changed, 102 insertions(+), 23 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index f9d0f443347..4155e2e195f 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -693,8 +693,23 @@ namespace ts {
             setFlowNodeReferenced(antecedent);
             return <FlowCondition>{
                 flags,
-                antecedent,
                 expression,
+                antecedent
+            };
+        }
+
+        function createFlowSwitchClause(antecedent: FlowNode, switchStatement: SwitchStatement, clauseStart: number, clauseEnd: number): FlowNode {
+            const expr = switchStatement.expression;
+            if (expr.kind !== SyntaxKind.PropertyAccessExpression || !isNarrowableReference((<PropertyAccessExpression>expr).expression)) {
+                return antecedent;
+            }
+            setFlowNodeReferenced(antecedent);
+            return <FlowSwitchClause>{
+                flags: FlowFlags.SwitchClause,
+                switchStatement,
+                clauseStart,
+                clauseEnd,
+                antecedent
             };
         }
 
@@ -923,9 +938,9 @@ namespace ts {
             preSwitchCaseFlow = currentFlow;
             bind(node.caseBlock);
             addAntecedent(postSwitchLabel, currentFlow);
-            const hasNonEmptyDefault = forEach(node.caseBlock.clauses, c => c.kind === SyntaxKind.DefaultClause && c.statements.length);
-            if (!hasNonEmptyDefault) {
-                addAntecedent(postSwitchLabel, preSwitchCaseFlow);
+            const hasDefault = forEach(node.caseBlock.clauses, c => c.kind === SyntaxKind.DefaultClause);
+            if (!hasDefault) {
+                addAntecedent(postSwitchLabel, createFlowSwitchClause(preSwitchCaseFlow, node, 0, 0));
             }
             currentBreakTarget = saveBreakTarget;
             preSwitchCaseFlow = savePreSwitchCaseFlow;
@@ -934,25 +949,22 @@ namespace ts {
 
         function bindCaseBlock(node: CaseBlock): void {
             const clauses = node.clauses;
+            let fallthroughFlow = unreachableFlow;
             for (let i = 0; i < clauses.length; i++) {
-                const clause = clauses[i];
-                if (clause.statements.length) {
-                    if (currentFlow.flags & FlowFlags.Unreachable) {
-                        currentFlow = preSwitchCaseFlow;
-                    }
-                    else {
-                        const preCaseLabel = createBranchLabel();
-                        addAntecedent(preCaseLabel, preSwitchCaseFlow);
-                        addAntecedent(preCaseLabel, currentFlow);
-                        currentFlow = finishFlowLabel(preCaseLabel);
-                    }
-                    bind(clause);
-                    if (!(currentFlow.flags & FlowFlags.Unreachable) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
-                        errorOnFirstToken(clause, Diagnostics.Fallthrough_case_in_switch);
-                    }
+                const clauseStart = i;
+                while (!clauses[i].statements.length && i + 1 < clauses.length) {
+                    bind(clauses[i]);
+                    i++;
                 }
-                else {
-                    bind(clause);
+                const preCaseLabel = createBranchLabel();
+                addAntecedent(preCaseLabel, createFlowSwitchClause(preSwitchCaseFlow, <SwitchStatement>node.parent, clauseStart, i + 1));
+                addAntecedent(preCaseLabel, fallthroughFlow);
+                currentFlow = finishFlowLabel(preCaseLabel);
+                const clause = clauses[i];
+                bind(clause);
+                fallthroughFlow = currentFlow;
+                if (!(currentFlow.flags & FlowFlags.Unreachable) && i !== clauses.length - 1 && options.noFallthroughCasesInSwitch) {
+                    errorOnFirstToken(clause, Diagnostics.Fallthrough_case_in_switch);
                 }
             }
         }
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 105401c0015..bb268b55da8 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7676,6 +7676,29 @@ namespace ts {
             return node;
         }
 
+        function getTypeOfSwitchClause(clause: CaseClause | DefaultClause) {
+            if (clause.kind === SyntaxKind.CaseClause) {
+                const expr = (<CaseClause>clause).expression;
+                return expr.kind === SyntaxKind.StringLiteral ? getStringLiteralTypeForText((<StringLiteral>expr).text) : checkExpression(expr);
+            }
+            return undefined;
+        }
+
+        function getSwitchClauseTypes(switchStatement: SwitchStatement): Type[] {
+            const links = getNodeLinks(switchStatement);
+            if (!links.switchTypes) {
+                // If all case clauses specify expressions that have unit types, we return an array
+                // of those unit types. Otherwise we return an empty array.
+                const types = map(switchStatement.caseBlock.clauses, getTypeOfSwitchClause);
+                links.switchTypes = forEach(types, t => !t || t.flags & TypeFlags.StringLiteral) ? types : emptyArray;
+            }
+            return links.switchTypes;
+        }
+
+        function eachTypeContainedIn(source: Type, types: Type[]) {
+            return source.flags & TypeFlags.Union ? !forEach((<UnionType>source).types, t => !contains(types, t)) : contains(types, source);
+        }
+
         function getFlowTypeOfReference(reference: Node, declaredType: Type, assumeInitialized: boolean, includeOuterFunctions: boolean) {
             let key: string;
             if (!reference.flowNode || assumeInitialized && !(declaredType.flags & TypeFlags.Narrowable)) {
@@ -7713,6 +7736,9 @@ namespace ts {
                     else if (flow.flags & FlowFlags.Condition) {
                         type = getTypeAtFlowCondition(<FlowCondition>flow);
                     }
+                    else if (flow.flags & FlowFlags.SwitchClause) {
+                        type = getTypeAtSwitchClause(<FlowSwitchClause>flow);
+                    }
                     else if (flow.flags & FlowFlags.Label) {
                         if ((<FlowLabel>flow).antecedents.length === 1) {
                             flow = (<FlowLabel>flow).antecedents[0];
@@ -7796,6 +7822,11 @@ namespace ts {
                 return type;
             }
 
+            function getTypeAtSwitchClause(flow: FlowSwitchClause) {
+                const type = getTypeAtFlowNode(flow.antecedent);
+                return narrowTypeBySwitchOnDiscriminant(type, flow.switchStatement, flow.clauseStart, flow.clauseEnd);
+            }
+
             function getTypeAtFlowBranchLabel(flow: FlowLabel) {
                 const antecedentTypes: Type[] = [];
                 for (const antecedent of flow.antecedents) {
@@ -7938,6 +7969,33 @@ namespace ts {
                 return type;
             }
 
+            function narrowTypeBySwitchOnDiscriminant(type: Type, switchStatement: SwitchStatement, clauseStart: number, clauseEnd: number) {
+                // We have switch statement with property access expression
+                if (!(type.flags & TypeFlags.Union) || !isMatchingReference(reference, (<PropertyAccessExpression>switchStatement.expression).expression)) {
+                    return type;
+                }
+                const propName = (<PropertyAccessExpression>switchStatement.expression).name.text;
+                const propType = getTypeOfPropertyOfType(type, propName);
+                if (!propType || !isStringLiteralUnionType(propType)) {
+                    return type;
+                }
+                const switchTypes = getSwitchClauseTypes(switchStatement);
+                if (!switchTypes.length) {
+                    return type;
+                }
+                const types = (<UnionType>type).types;
+                const clauseTypes = switchTypes.slice(clauseStart, clauseEnd);
+                const hasDefaultClause = clauseStart === clauseEnd || contains(clauseTypes, undefined);
+                const caseTypes = hasDefaultClause ? filter(clauseTypes, t => !!t) : clauseTypes;
+                const discriminantType = caseTypes.length ? getUnionType(caseTypes) : undefined;
+                const caseType = discriminantType && getUnionType(filter(types, t => isTypeComparableTo(discriminantType, getTypeOfPropertyOfType(t, propName))));
+                if (!hasDefaultClause) {
+                    return caseType;
+                }
+                const defaultType = getUnionType(filter(types, t => !eachTypeContainedIn(getTypeOfPropertyOfType(t, propName), switchTypes)));
+                return caseType ? getUnionType([caseType, defaultType]) : defaultType;
+            }
+
             function narrowTypeByTypeof(type: Type, expr: BinaryExpression, assumeTrue: boolean): Type {
                 // We have '==', '!=', '====', or !==' operator with 'typeof xxx' on the left
                 // and string literal on the right
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index 9f78d98629e..fbcdc594656 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1554,8 +1554,9 @@ namespace ts {
         Assignment     = 1 << 4,  // Assignment
         TrueCondition  = 1 << 5,  // Condition known to be true
         FalseCondition = 1 << 6,  // Condition known to be false
-        Referenced     = 1 << 7,  // Referenced as antecedent once
-        Shared         = 1 << 8,  // Referenced as antecedent more than once
+        SwitchClause   = 1 << 7,  // Switch statement clause
+        Referenced     = 1 << 8,  // Referenced as antecedent once
+        Shared         = 1 << 9,  // Referenced as antecedent more than once
         Label = BranchLabel | LoopLabel,
         Condition = TrueCondition | FalseCondition
     }
@@ -1591,6 +1592,13 @@ namespace ts {
         antecedent: FlowNode;
     }
 
+    export interface FlowSwitchClause extends FlowNode {
+        switchStatement: SwitchStatement;
+        clauseStart: number;   // Start index of case/default clause range
+        clauseEnd: number;     // End index of case/default clause range
+        antecedent: FlowNode;
+    }
+
     export interface AmdDependency {
         path: string;
         name: string;
@@ -2170,6 +2178,7 @@ namespace ts {
         resolvedJsxType?: Type;           // resolved element attributes type of a JSX openinglike element
         hasSuperCall?: boolean;           // recorded result when we try to find super-call. We only try to find one if this flag is undefined, indicating that we haven't made an attempt.
         superCall?: ExpressionStatement;  // Cached first super-call found in the constructor. Used in checking whether super is called before this-accessing
+        switchTypes?: Type[];             // Cached array of switch case expression types
     }
 
     export const enum TypeFlags {

From 29f52914530e2c632cb3cd5bea9dcd8fe8bca327 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Mon, 13 Jun 2016 14:37:07 -0700
Subject: [PATCH 274/332] Refactor

---
 src/compiler/program.ts | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 28dd6275143..15afbe18265 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -178,6 +178,11 @@ namespace ts {
 
     const typeReferenceExtensions = [".d.ts"];
 
+    function getEffectiveTypeRoots(options: CompilerOptions, host: ModuleResolutionHost) {
+        return options.typeRoots ||
+            defaultTypeRoots.map(d => combinePaths(options.configFilePath ? getDirectoryPath(options.configFilePath) : host.getCurrentDirectory(), d));
+    }
+
     /**
      * @param {string | undefined} containingFile - file that contains type reference directive, can be undefined if containing file is unknown.
      * This is possible in case if resolution is performed for directives specified via 'types' parameter. In this case initial path for secondary lookups
@@ -192,8 +197,7 @@ namespace ts {
             traceEnabled
         };
 
-        const typeRoots = options.typeRoots ||
-            defaultTypeRoots.map(d => combinePaths(options.configFilePath ? getDirectoryPath(options.configFilePath) : host.getCurrentDirectory(), d));
+        const typeRoots = getEffectiveTypeRoots(options, host);
         if (traceEnabled) {
             if (containingFile === undefined) {
                 if (typeRoots === undefined) {
@@ -1032,8 +1036,7 @@ namespace ts {
         // Walk the primary type lookup locations
         let result: string[] = [];
         if (host.directoryExists && host.getDirectories) {
-            const typeRoots = options.typeRoots ||
-                defaultTypeRoots.map(d => combinePaths(options.configFilePath ? getDirectoryPath(options.configFilePath) : host.getCurrentDirectory(), d));
+            const typeRoots = getEffectiveTypeRoots(options, host);
             for (const root of typeRoots) {
                 if (host.directoryExists(root)) {
                     result = result.concat(host.getDirectories(root));
@@ -1208,7 +1211,7 @@ namespace ts {
                 (oldOptions.rootDir !== options.rootDir) ||
                 (oldOptions.configFilePath !== options.configFilePath) ||
                 (oldOptions.baseUrl !== options.baseUrl) ||
-                (oldOptions.typeRoots !== options.typeRoots) ||
+                !arrayIsEqualTo(oldOptions.typeRoots, oldOptions.typeRoots) ||
                 !arrayIsEqualTo(oldOptions.rootDirs, options.rootDirs) ||
                 !mapIsEqualTo(oldOptions.paths, options.paths)) {
                 return false;

From 236351d4f0b83a943a90e2a9f6e9994fae256ef7 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Mon, 13 Jun 2016 14:43:19 -0700
Subject: [PATCH 275/332] Add unit test

---
 tests/cases/unittests/reuseProgramStructure.ts | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/tests/cases/unittests/reuseProgramStructure.ts b/tests/cases/unittests/reuseProgramStructure.ts
index 154cfdd702f..db67eb2c252 100644
--- a/tests/cases/unittests/reuseProgramStructure.ts
+++ b/tests/cases/unittests/reuseProgramStructure.ts
@@ -259,6 +259,22 @@ namespace ts {
             assert.isTrue(!program_1.structureIsReused);
         });
 
+        it("fails if change affects type references", () => {
+            const program_1 = newProgram(files, ["a.ts"], { types: ["a"] });
+            updateProgram(program_1, ["a.ts"], { types: ["b"] }, files => {
+
+            });
+            assert.isTrue(!program_1.structureIsReused);
+        });
+
+        it("succeeds if change doesn't affect type references", () => {
+            const program_1 = newProgram(files, ["a.ts"], { types: ["a"] });
+            updateProgram(program_1, ["a.ts"], { types: ["a"] },afiles => {
+
+            });
+            assert.isTrue(program_1.structureIsReused);
+        });
+
         it("fails if change affects imports", () => {
             const program_1 = newProgram(files, ["a.ts"], { target });
             updateProgram(program_1, ["a.ts"], { target }, files => {

From 90b319fc246d53604f54c9b7d003ab2dfb741ec6 Mon Sep 17 00:00:00 2001
From: Ryan Cavanaugh <RyanCavanaugh@users.noreply.github.com>
Date: Mon, 13 Jun 2016 14:52:41 -0700
Subject: [PATCH 276/332] lint

---
 tests/cases/unittests/reuseProgramStructure.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/cases/unittests/reuseProgramStructure.ts b/tests/cases/unittests/reuseProgramStructure.ts
index db67eb2c252..b8a36baf824 100644
--- a/tests/cases/unittests/reuseProgramStructure.ts
+++ b/tests/cases/unittests/reuseProgramStructure.ts
@@ -269,7 +269,7 @@ namespace ts {
 
         it("succeeds if change doesn't affect type references", () => {
             const program_1 = newProgram(files, ["a.ts"], { types: ["a"] });
-            updateProgram(program_1, ["a.ts"], { types: ["a"] },afiles => {
+            updateProgram(program_1, ["a.ts"], { types: ["a"] }, files => {
 
             });
             assert.isTrue(program_1.structureIsReused);

From c90b0fe17dec9ce42a3079b1adc806d860bf6c43 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Mon, 13 Jun 2016 16:20:13 -0700
Subject: [PATCH 277/332] No implicit returns following exhaustive switch
 statements

---
 src/compiler/binder.ts  | 11 +++++++++--
 src/compiler/checker.ts | 36 ++++++++++++++++++++++++++++++++++--
 src/compiler/types.ts   |  1 +
 3 files changed, 44 insertions(+), 4 deletions(-)

diff --git a/src/compiler/binder.ts b/src/compiler/binder.ts
index 4155e2e195f..e413c20f79c 100644
--- a/src/compiler/binder.ts
+++ b/src/compiler/binder.ts
@@ -650,6 +650,11 @@ namespace ts {
             return isNarrowableReference(expr);
         }
 
+        function isNarrowingSwitchStatement(switchStatement: SwitchStatement) {
+            const expr = switchStatement.expression;
+            return expr.kind === SyntaxKind.PropertyAccessExpression && isNarrowableReference((<PropertyAccessExpression>expr).expression);
+        }
+
         function createBranchLabel(): FlowLabel {
             return {
                 flags: FlowFlags.BranchLabel,
@@ -699,8 +704,7 @@ namespace ts {
         }
 
         function createFlowSwitchClause(antecedent: FlowNode, switchStatement: SwitchStatement, clauseStart: number, clauseEnd: number): FlowNode {
-            const expr = switchStatement.expression;
-            if (expr.kind !== SyntaxKind.PropertyAccessExpression || !isNarrowableReference((<PropertyAccessExpression>expr).expression)) {
+            if (!isNarrowingSwitchStatement(switchStatement)) {
                 return antecedent;
             }
             setFlowNodeReferenced(antecedent);
@@ -939,6 +943,9 @@ namespace ts {
             bind(node.caseBlock);
             addAntecedent(postSwitchLabel, currentFlow);
             const hasDefault = forEach(node.caseBlock.clauses, c => c.kind === SyntaxKind.DefaultClause);
+            // We mark a switch statement as possibly exhaustive if it has no default clause and if all
+            // case clauses have unreachable end points (e.g. they all return).
+            node.possiblyExhaustive = !hasDefault && !postSwitchLabel.antecedents;
             if (!hasDefault) {
                 addAntecedent(postSwitchLabel, createFlowSwitchClause(preSwitchCaseFlow, node, 0, 0));
             }
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index bb268b55da8..46e683fc0c8 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -11808,10 +11808,42 @@ namespace ts {
             return aggregatedTypes;
         }
 
+        function isExhaustiveSwitchStatement(node: SwitchStatement): boolean {
+            const expr = node.expression;
+            if (!node.possiblyExhaustive || expr.kind !== SyntaxKind.PropertyAccessExpression) {
+                return false;
+            }
+            const type = checkExpression((<PropertyAccessExpression>expr).expression);
+            if (!(type.flags & TypeFlags.Union)) {
+                return false;
+            }
+            const propName = (<PropertyAccessExpression>expr).name.text;
+            const propType = getTypeOfPropertyOfType(type, propName);
+            if (!propType || !isStringLiteralUnionType(propType)) {
+                return false;
+            }
+            const switchTypes = getSwitchClauseTypes(node);
+            if (!switchTypes.length) {
+                return false;
+            }
+            return eachTypeContainedIn(propType, switchTypes);
+        }
+
+        function functionHasImplicitReturn(func: FunctionLikeDeclaration) {
+            if (!(func.flags & NodeFlags.HasImplicitReturn)) {
+                return false;
+            }
+            const lastStatement = lastOrUndefined((<Block>func.body).statements);
+            if (lastStatement && lastStatement.kind === SyntaxKind.SwitchStatement && isExhaustiveSwitchStatement(<SwitchStatement>lastStatement)) {
+                return false;
+            }
+            return true;
+        }
+
         function checkAndAggregateReturnExpressionTypes(func: FunctionLikeDeclaration, contextualMapper: TypeMapper): Type[] {
             const isAsync = isAsyncFunctionLike(func);
             const aggregatedTypes: Type[] = [];
-            let hasReturnWithNoExpression = !!(func.flags & NodeFlags.HasImplicitReturn);
+            let hasReturnWithNoExpression = functionHasImplicitReturn(func);
             let hasReturnOfTypeNever = false;
             forEachReturnStatement(<Block>func.body, returnStatement => {
                 const expr = returnStatement.expression;
@@ -11868,7 +11900,7 @@ namespace ts {
 
             // If all we have is a function signature, or an arrow function with an expression body, then there is nothing to check.
             // also if HasImplicitReturn flag is not set this means that all codepaths in function body end with return or throw
-            if (nodeIsMissing(func.body) || func.body.kind !== SyntaxKind.Block || !(func.flags & NodeFlags.HasImplicitReturn)) {
+            if (nodeIsMissing(func.body) || func.body.kind !== SyntaxKind.Block || !functionHasImplicitReturn(func)) {
                 return;
             }
 
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index fbcdc594656..d44023ac773 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -1188,6 +1188,7 @@ namespace ts {
     export interface SwitchStatement extends Statement {
         expression: Expression;
         caseBlock: CaseBlock;
+        possiblyExhaustive?: boolean;
     }
 
     // @kind(SyntaxKind.CaseBlock)

From 318e9573779136a169dc4a7c0da3d918389d7cce Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Mon, 13 Jun 2016 23:33:23 -0700
Subject: [PATCH 278/332] Added tests.

---
 .../shorthandOfExportedEntity01_targetES2015_CommonJS.ts | 9 +++++++++
 .../shorthandOfExportedEntity02_targetES5_CommonJS.ts    | 9 +++++++++
 2 files changed, 18 insertions(+)
 create mode 100644 tests/cases/compiler/shorthandOfExportedEntity01_targetES2015_CommonJS.ts
 create mode 100644 tests/cases/compiler/shorthandOfExportedEntity02_targetES5_CommonJS.ts

diff --git a/tests/cases/compiler/shorthandOfExportedEntity01_targetES2015_CommonJS.ts b/tests/cases/compiler/shorthandOfExportedEntity01_targetES2015_CommonJS.ts
new file mode 100644
index 00000000000..25328afd6ce
--- /dev/null
+++ b/tests/cases/compiler/shorthandOfExportedEntity01_targetES2015_CommonJS.ts
@@ -0,0 +1,9 @@
+// @target: ES2015
+// @module: commonjs
+// @declaration: true
+
+export const test = "test";
+
+export function foo () {
+  const x = { test };
+}
diff --git a/tests/cases/compiler/shorthandOfExportedEntity02_targetES5_CommonJS.ts b/tests/cases/compiler/shorthandOfExportedEntity02_targetES5_CommonJS.ts
new file mode 100644
index 00000000000..c7b3a2b37ec
--- /dev/null
+++ b/tests/cases/compiler/shorthandOfExportedEntity02_targetES5_CommonJS.ts
@@ -0,0 +1,9 @@
+// @target: ES5
+// @module: commonjs
+// @declaration: true
+
+export const test = "test";
+
+export function foo () {
+  const x = { test };
+}

From d54094c6f7533a76c11c0bbb98148c62146f28e8 Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Mon, 13 Jun 2016 23:33:36 -0700
Subject: [PATCH 279/332] Accepted baselines.

---
 ...fExportedEntity01_targetES2015_CommonJS.js | 21 +++++++++++++++++++
 ...rtedEntity01_targetES2015_CommonJS.symbols | 13 ++++++++++++
 ...portedEntity01_targetES2015_CommonJS.types | 15 +++++++++++++
 ...ndOfExportedEntity02_targetES5_CommonJS.js | 21 +++++++++++++++++++
 ...xportedEntity02_targetES5_CommonJS.symbols | 13 ++++++++++++
 ...fExportedEntity02_targetES5_CommonJS.types | 15 +++++++++++++
 6 files changed, 98 insertions(+)
 create mode 100644 tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.js
 create mode 100644 tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.symbols
 create mode 100644 tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.types
 create mode 100644 tests/baselines/reference/shorthandOfExportedEntity02_targetES5_CommonJS.js
 create mode 100644 tests/baselines/reference/shorthandOfExportedEntity02_targetES5_CommonJS.symbols
 create mode 100644 tests/baselines/reference/shorthandOfExportedEntity02_targetES5_CommonJS.types

diff --git a/tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.js b/tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.js
new file mode 100644
index 00000000000..dbbc72fead3
--- /dev/null
+++ b/tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.js
@@ -0,0 +1,21 @@
+//// [shorthandOfExportedEntity01_targetES2015_CommonJS.ts]
+
+export const test = "test";
+
+export function foo () {
+  const x = { test };
+}
+
+
+//// [shorthandOfExportedEntity01_targetES2015_CommonJS.js]
+"use strict";
+exports.test = "test";
+function foo() {
+    const x = { test };
+}
+exports.foo = foo;
+
+
+//// [shorthandOfExportedEntity01_targetES2015_CommonJS.d.ts]
+export declare const test: string;
+export declare function foo(): void;
diff --git a/tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.symbols b/tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.symbols
new file mode 100644
index 00000000000..341d40bc542
--- /dev/null
+++ b/tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.symbols
@@ -0,0 +1,13 @@
+=== tests/cases/compiler/shorthandOfExportedEntity01_targetES2015_CommonJS.ts ===
+
+export const test = "test";
+>test : Symbol(test, Decl(shorthandOfExportedEntity01_targetES2015_CommonJS.ts, 1, 12))
+
+export function foo () {
+>foo : Symbol(foo, Decl(shorthandOfExportedEntity01_targetES2015_CommonJS.ts, 1, 27))
+
+  const x = { test };
+>x : Symbol(x, Decl(shorthandOfExportedEntity01_targetES2015_CommonJS.ts, 4, 7))
+>test : Symbol(test, Decl(shorthandOfExportedEntity01_targetES2015_CommonJS.ts, 4, 13))
+}
+
diff --git a/tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.types b/tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.types
new file mode 100644
index 00000000000..dcc04015993
--- /dev/null
+++ b/tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.types
@@ -0,0 +1,15 @@
+=== tests/cases/compiler/shorthandOfExportedEntity01_targetES2015_CommonJS.ts ===
+
+export const test = "test";
+>test : string
+>"test" : string
+
+export function foo () {
+>foo : () => void
+
+  const x = { test };
+>x : { test: string; }
+>{ test } : { test: string; }
+>test : string
+}
+
diff --git a/tests/baselines/reference/shorthandOfExportedEntity02_targetES5_CommonJS.js b/tests/baselines/reference/shorthandOfExportedEntity02_targetES5_CommonJS.js
new file mode 100644
index 00000000000..764739705c4
--- /dev/null
+++ b/tests/baselines/reference/shorthandOfExportedEntity02_targetES5_CommonJS.js
@@ -0,0 +1,21 @@
+//// [shorthandOfExportedEntity02_targetES5_CommonJS.ts]
+
+export const test = "test";
+
+export function foo () {
+  const x = { test };
+}
+
+
+//// [shorthandOfExportedEntity02_targetES5_CommonJS.js]
+"use strict";
+exports.test = "test";
+function foo() {
+    var x = { test: exports.test };
+}
+exports.foo = foo;
+
+
+//// [shorthandOfExportedEntity02_targetES5_CommonJS.d.ts]
+export declare const test: string;
+export declare function foo(): void;
diff --git a/tests/baselines/reference/shorthandOfExportedEntity02_targetES5_CommonJS.symbols b/tests/baselines/reference/shorthandOfExportedEntity02_targetES5_CommonJS.symbols
new file mode 100644
index 00000000000..3b0b40922c9
--- /dev/null
+++ b/tests/baselines/reference/shorthandOfExportedEntity02_targetES5_CommonJS.symbols
@@ -0,0 +1,13 @@
+=== tests/cases/compiler/shorthandOfExportedEntity02_targetES5_CommonJS.ts ===
+
+export const test = "test";
+>test : Symbol(test, Decl(shorthandOfExportedEntity02_targetES5_CommonJS.ts, 1, 12))
+
+export function foo () {
+>foo : Symbol(foo, Decl(shorthandOfExportedEntity02_targetES5_CommonJS.ts, 1, 27))
+
+  const x = { test };
+>x : Symbol(x, Decl(shorthandOfExportedEntity02_targetES5_CommonJS.ts, 4, 7))
+>test : Symbol(test, Decl(shorthandOfExportedEntity02_targetES5_CommonJS.ts, 4, 13))
+}
+
diff --git a/tests/baselines/reference/shorthandOfExportedEntity02_targetES5_CommonJS.types b/tests/baselines/reference/shorthandOfExportedEntity02_targetES5_CommonJS.types
new file mode 100644
index 00000000000..27d16e2166f
--- /dev/null
+++ b/tests/baselines/reference/shorthandOfExportedEntity02_targetES5_CommonJS.types
@@ -0,0 +1,15 @@
+=== tests/cases/compiler/shorthandOfExportedEntity02_targetES5_CommonJS.ts ===
+
+export const test = "test";
+>test : string
+>"test" : string
+
+export function foo () {
+>foo : () => void
+
+  const x = { test };
+>x : { test: string; }
+>{ test } : { test: string; }
+>test : string
+}
+

From eae289c7b7e645e14f9d1655e918d0c4660f903f Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Mon, 13 Jun 2016 23:33:47 -0700
Subject: [PATCH 280/332] Emit 'exports.' if the shorthand is a general export.

---
 src/compiler/emitter.ts | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index 46362bd7827..411c0494546 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -2150,9 +2150,9 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
             }
 
             // Return true if identifier resolves to an exported member of a namespace
-            function isNamespaceExportReference(node: Identifier) {
+            function isExportReference(node: Identifier) {
                 const container = resolver.getReferencedExportContainer(node);
-                return container && container.kind !== SyntaxKind.SourceFile;
+                return !!container;
             }
 
             // Return true if identifier resolves to an imported identifier
@@ -2185,10 +2185,10 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                 //   const foo_1 = require('./foo');
                 //   exports.baz = { foo: foo_1.foo };
                 //
-                if (languageVersion < ScriptTarget.ES6 || (modulekind !== ModuleKind.ES6 && isImportedReference(node.name)) || isNamespaceExportReference(node.name) ) {
+                if (languageVersion < ScriptTarget.ES6 || (modulekind !== ModuleKind.ES6 && isImportedReference(node.name)) || isExportReference(node.name)) {
                     // Emit identifier as an identifier
                     write(": ");
-                    emit(node.name);
+                    emitExpressionIdentifier(node.name);
                 }
 
                 if (languageVersion >= ScriptTarget.ES6 && node.objectAssignmentInitializer) {

From e8a7e0c0d41fa524ddb7912d0b335abce7e4b1ea Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Mon, 13 Jun 2016 23:34:00 -0700
Subject: [PATCH 281/332] Accepted baselines.

---
 .../shorthandOfExportedEntity01_targetES2015_CommonJS.js        | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.js b/tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.js
index dbbc72fead3..9e057951b3a 100644
--- a/tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.js
+++ b/tests/baselines/reference/shorthandOfExportedEntity01_targetES2015_CommonJS.js
@@ -11,7 +11,7 @@ export function foo () {
 "use strict";
 exports.test = "test";
 function foo() {
-    const x = { test };
+    const x = { test: exports.test };
 }
 exports.foo = foo;
 

From f6cee27af9479236b3c2dc58460aea9cde728579 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Tue, 14 Jun 2016 06:11:00 -0700
Subject: [PATCH 282/332] Emit 'Promise' decorator metadata return type for
 async methods

---
 src/compiler/emitter.ts                       | 13 +++-
 .../reference/decoratorMetadataPromise.js     | 59 +++++++++++++++++++
 .../decoratorMetadataPromise.symbols          | 33 +++++++++++
 .../reference/decoratorMetadataPromise.types  | 34 +++++++++++
 .../compiler/decoratorMetadataPromise.ts      | 14 +++++
 5 files changed, 150 insertions(+), 3 deletions(-)
 create mode 100644 tests/baselines/reference/decoratorMetadataPromise.js
 create mode 100644 tests/baselines/reference/decoratorMetadataPromise.symbols
 create mode 100644 tests/baselines/reference/decoratorMetadataPromise.types
 create mode 100644 tests/cases/compiler/decoratorMetadataPromise.ts

diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index e3f092257a3..e37a4d2d048 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -6156,9 +6156,16 @@ const _super = (function (geti, seti) {
 
             /** Serializes the return type of function. Used by the __metadata decorator for a method. */
             function emitSerializedReturnTypeOfNode(node: Node) {
-                if (node && isFunctionLike(node) && (<FunctionLikeDeclaration>node).type) {
-                    emitSerializedTypeNode((<FunctionLikeDeclaration>node).type);
-                    return;
+                if (node && isFunctionLike(node)) {
+                    const fn = <FunctionLikeDeclaration>node;
+                    if (fn.type) {
+                        emitSerializedTypeNode((<FunctionLikeDeclaration>node).type);
+                        return;
+                    }
+                    else if (isAsyncFunctionLike(fn)) {
+                        write("Promise");
+                        return;
+                    }
                 }
 
                 write("void 0");
diff --git a/tests/baselines/reference/decoratorMetadataPromise.js b/tests/baselines/reference/decoratorMetadataPromise.js
new file mode 100644
index 00000000000..3ed8942033d
--- /dev/null
+++ b/tests/baselines/reference/decoratorMetadataPromise.js
@@ -0,0 +1,59 @@
+//// [decoratorMetadataPromise.ts]
+
+declare const decorator: MethodDecorator;
+
+class A {
+    @decorator
+    async foo() {}
+    @decorator
+    async bar(): Promise<number> { return 0; }
+    @decorator
+    baz(n: Promise<number>): Promise<number> { return n; }
+}
+
+
+//// [decoratorMetadataPromise.js]
+var __decorate = (this && this.__decorate) || function (decorators, target, key, desc) {
+    var c = arguments.length, r = c < 3 ? target : desc === null ? desc = Object.getOwnPropertyDescriptor(target, key) : desc, d;
+    if (typeof Reflect === "object" && typeof Reflect.decorate === "function") r = Reflect.decorate(decorators, target, key, desc);
+    else for (var i = decorators.length - 1; i >= 0; i--) if (d = decorators[i]) r = (c < 3 ? d(r) : c > 3 ? d(target, key, r) : d(target, key)) || r;
+    return c > 3 && r && Object.defineProperty(target, key, r), r;
+};
+var __metadata = (this && this.__metadata) || function (k, v) {
+    if (typeof Reflect === "object" && typeof Reflect.metadata === "function") return Reflect.metadata(k, v);
+};
+var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
+    return new (P || (P = Promise))(function (resolve, reject) {
+        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
+        function rejected(value) { try { step(generator.throw(value)); } catch (e) { reject(e); } }
+        function step(result) { result.done ? resolve(result.value) : new P(function (resolve) { resolve(result.value); }).then(fulfilled, rejected); }
+        step((generator = generator.apply(thisArg, _arguments)).next());
+    });
+};
+class A {
+    foo() {
+        return __awaiter(this, void 0, void 0, function* () { });
+    }
+    bar() {
+        return __awaiter(this, void 0, void 0, function* () { return 0; });
+    }
+    baz(n) { return n; }
+}
+__decorate([
+    decorator, 
+    __metadata('design:type', Function), 
+    __metadata('design:paramtypes', []), 
+    __metadata('design:returntype', Promise)
+], A.prototype, "foo", null);
+__decorate([
+    decorator, 
+    __metadata('design:type', Function), 
+    __metadata('design:paramtypes', []), 
+    __metadata('design:returntype', Promise)
+], A.prototype, "bar", null);
+__decorate([
+    decorator, 
+    __metadata('design:type', Function), 
+    __metadata('design:paramtypes', [Promise]), 
+    __metadata('design:returntype', Promise)
+], A.prototype, "baz", null);
diff --git a/tests/baselines/reference/decoratorMetadataPromise.symbols b/tests/baselines/reference/decoratorMetadataPromise.symbols
new file mode 100644
index 00000000000..b0ebe05e8c1
--- /dev/null
+++ b/tests/baselines/reference/decoratorMetadataPromise.symbols
@@ -0,0 +1,33 @@
+=== tests/cases/compiler/decoratorMetadataPromise.ts ===
+
+declare const decorator: MethodDecorator;
+>decorator : Symbol(decorator, Decl(decoratorMetadataPromise.ts, 1, 13))
+>MethodDecorator : Symbol(MethodDecorator, Decl(lib.es5.d.ts, --, --))
+
+class A {
+>A : Symbol(A, Decl(decoratorMetadataPromise.ts, 1, 41))
+
+    @decorator
+>decorator : Symbol(decorator, Decl(decoratorMetadataPromise.ts, 1, 13))
+
+    async foo() {}
+>foo : Symbol(A.foo, Decl(decoratorMetadataPromise.ts, 3, 9))
+
+    @decorator
+>decorator : Symbol(decorator, Decl(decoratorMetadataPromise.ts, 1, 13))
+
+    async bar(): Promise<number> { return 0; }
+>bar : Symbol(A.bar, Decl(decoratorMetadataPromise.ts, 5, 18))
+>Promise : Symbol(Promise, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
+
+    @decorator
+>decorator : Symbol(decorator, Decl(decoratorMetadataPromise.ts, 1, 13))
+
+    baz(n: Promise<number>): Promise<number> { return n; }
+>baz : Symbol(A.baz, Decl(decoratorMetadataPromise.ts, 7, 46))
+>n : Symbol(n, Decl(decoratorMetadataPromise.ts, 9, 8))
+>Promise : Symbol(Promise, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
+>Promise : Symbol(Promise, Decl(lib.es2015.symbol.wellknown.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --), Decl(lib.es2015.promise.d.ts, --, --), Decl(lib.es2015.iterable.d.ts, --, --))
+>n : Symbol(n, Decl(decoratorMetadataPromise.ts, 9, 8))
+}
+
diff --git a/tests/baselines/reference/decoratorMetadataPromise.types b/tests/baselines/reference/decoratorMetadataPromise.types
new file mode 100644
index 00000000000..900e751e841
--- /dev/null
+++ b/tests/baselines/reference/decoratorMetadataPromise.types
@@ -0,0 +1,34 @@
+=== tests/cases/compiler/decoratorMetadataPromise.ts ===
+
+declare const decorator: MethodDecorator;
+>decorator : <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void
+>MethodDecorator : <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void
+
+class A {
+>A : A
+
+    @decorator
+>decorator : <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void
+
+    async foo() {}
+>foo : () => Promise<void>
+
+    @decorator
+>decorator : <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void
+
+    async bar(): Promise<number> { return 0; }
+>bar : () => Promise<number>
+>Promise : Promise<T>
+>0 : number
+
+    @decorator
+>decorator : <T>(target: Object, propertyKey: string | symbol, descriptor: TypedPropertyDescriptor<T>) => TypedPropertyDescriptor<T> | void
+
+    baz(n: Promise<number>): Promise<number> { return n; }
+>baz : (n: Promise<number>) => Promise<number>
+>n : Promise<number>
+>Promise : Promise<T>
+>Promise : Promise<T>
+>n : Promise<number>
+}
+
diff --git a/tests/cases/compiler/decoratorMetadataPromise.ts b/tests/cases/compiler/decoratorMetadataPromise.ts
new file mode 100644
index 00000000000..ef55e1946de
--- /dev/null
+++ b/tests/cases/compiler/decoratorMetadataPromise.ts
@@ -0,0 +1,14 @@
+// @experimentaldecorators: true
+// @emitdecoratormetadata: true
+// @target: es6
+
+declare const decorator: MethodDecorator;
+
+class A {
+    @decorator
+    async foo() {}
+    @decorator
+    async bar(): Promise<number> { return 0; }
+    @decorator
+    baz(n: Promise<number>): Promise<number> { return n; }
+}

From 33e4c7a9a3a4d2824c0967a615637df5429fa8d1 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Tue, 14 Jun 2016 06:50:44 -0700
Subject: [PATCH 283/332] Respond to PR comment

---
 src/compiler/emitter.ts | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index e37a4d2d048..12377a0f26c 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -6157,12 +6157,11 @@ const _super = (function (geti, seti) {
             /** Serializes the return type of function. Used by the __metadata decorator for a method. */
             function emitSerializedReturnTypeOfNode(node: Node) {
                 if (node && isFunctionLike(node)) {
-                    const fn = <FunctionLikeDeclaration>node;
-                    if (fn.type) {
+                    if ((<FunctionLikeDeclaration>node).type) {
                         emitSerializedTypeNode((<FunctionLikeDeclaration>node).type);
                         return;
                     }
-                    else if (isAsyncFunctionLike(fn)) {
+                    else if (isAsyncFunctionLike(<FunctionLikeDeclaration>node)) {
                         write("Promise");
                         return;
                     }

From 1b4b01eed5c67591827e10c4b268ac97cd2f1937 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Tue, 14 Jun 2016 06:49:17 -0700
Subject: [PATCH 284/332] Unescape identifiers used in code completion

---
 src/harness/fourslash.ts                        | 2 ++
 src/services/services.ts                        | 2 +-
 tests/cases/fourslash/codeCompletionEscaping.ts | 8 ++++++++
 3 files changed, 11 insertions(+), 1 deletion(-)
 create mode 100644 tests/cases/fourslash/codeCompletionEscaping.ts

diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index 8104f113392..17f14e30737 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -717,6 +717,8 @@ namespace FourSlash {
         public verifyCompletionEntryDetails(entryName: string, expectedText: string, expectedDocumentation?: string, kind?: string) {
             const details = this.getCompletionEntryDetails(entryName);
 
+            assert(details, "no completion entry available");
+
             assert.equal(ts.displayPartsToString(details.displayParts), expectedText, this.assertionMessageAtLastKnownMarker("completion entry details text"));
 
             if (expectedDocumentation !== undefined) {
diff --git a/src/services/services.ts b/src/services/services.ts
index d051a4378e4..d5f63627471 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -3234,7 +3234,7 @@ namespace ts {
                 }
             }
 
-            return name;
+            return unescapeIdentifier(name);
         }
 
         function getCompletionData(fileName: string, position: number) {
diff --git a/tests/cases/fourslash/codeCompletionEscaping.ts b/tests/cases/fourslash/codeCompletionEscaping.ts
new file mode 100644
index 00000000000..b8182307b7b
--- /dev/null
+++ b/tests/cases/fourslash/codeCompletionEscaping.ts
@@ -0,0 +1,8 @@
+/// <reference path="fourslash.ts" />
+
+// @Filename: a.js
+// @allowJs: true
+////__foo;/**/
+
+goTo.marker();
+verify.completionListContains("__foo", undefined, undefined, "warning");

From 792b23edc23684d0577143659cf9a37bab10dc73 Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 14 Jun 2016 08:48:26 -0700
Subject: [PATCH 285/332] Make isDefinition required.

For the deprecated getOccurrencesAtPosition, isDefinition is always false.
---
 src/server/client.ts     | 1 +
 src/server/protocol.d.ts | 2 +-
 src/services/services.ts | 5 +++--
 3 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/server/client.ts b/src/server/client.ts
index ea6c948c4fb..864dac9fdaa 100644
--- a/src/server/client.ts
+++ b/src/server/client.ts
@@ -537,6 +537,7 @@ namespace ts.server {
                     fileName,
                     textSpan: ts.createTextSpanFromBounds(start, end),
                     isWriteAccess: entry.isWriteAccess,
+                    isDefinition: false
                 };
             });
         }
diff --git a/src/server/protocol.d.ts b/src/server/protocol.d.ts
index dd29411f97d..b62d89ae520 100644
--- a/src/server/protocol.d.ts
+++ b/src/server/protocol.d.ts
@@ -308,7 +308,7 @@ declare namespace ts.server.protocol {
         /**
          * True if reference is a definition, false otherwise.
          */
-        isDefinition?: boolean;
+        isDefinition: boolean;
     }
 
     /**
diff --git a/src/services/services.ts b/src/services/services.ts
index 5e1b69170a5..4f5bdbdc469 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -1208,7 +1208,7 @@ namespace ts {
         textSpan: TextSpan;
         fileName: string;
         isWriteAccess: boolean;
-        isDefinition?: boolean;
+        isDefinition: boolean;
     }
 
     export interface DocumentHighlights {
@@ -5750,7 +5750,8 @@ namespace ts {
                         result.push({
                             fileName: entry.fileName,
                             textSpan: highlightSpan.textSpan,
-                            isWriteAccess: highlightSpan.kind === HighlightSpanKind.writtenReference
+                            isWriteAccess: highlightSpan.kind === HighlightSpanKind.writtenReference,
+                            isDefinition: false
                         });
                     }
                 }

From 00376f42d84b01fc8ccb15d85d30baafcd1c2eaa Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 14 Jun 2016 09:33:15 -0700
Subject: [PATCH 286/332] Narrow non-union types to ensure consistent results

---
 src/compiler/checker.ts | 19 ++++++++++++-------
 1 file changed, 12 insertions(+), 7 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 46e683fc0c8..cc28f0fcbd2 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -7699,6 +7699,12 @@ namespace ts {
             return source.flags & TypeFlags.Union ? !forEach((<UnionType>source).types, t => !contains(types, t)) : contains(types, source);
         }
 
+        function filterType(type: Type, f: (t: Type) => boolean): Type {
+            return type.flags & TypeFlags.Union ?
+                getUnionType(filter((<UnionType>type).types, f)) :
+                f(type) ? type : neverType;
+        }
+
         function getFlowTypeOfReference(reference: Node, declaredType: Type, assumeInitialized: boolean, includeOuterFunctions: boolean) {
             let key: string;
             if (!reference.flowNode || assumeInitialized && !(declaredType.flags & TypeFlags.Narrowable)) {
@@ -7944,7 +7950,7 @@ namespace ts {
 
             function narrowTypeByDiscriminant(type: Type, expr: BinaryExpression, assumeTrue: boolean): Type {
                 // We have '==', '!=', '===', or '!==' operator with property access on left
-                if (!(type.flags & TypeFlags.Union) || !isMatchingReference(reference, (<PropertyAccessExpression>expr.left).expression)) {
+                if (!isMatchingReference(reference, (<PropertyAccessExpression>expr.left).expression)) {
                     return type;
                 }
                 const propName = (<PropertyAccessExpression>expr.left).name.text;
@@ -7961,17 +7967,17 @@ namespace ts {
                     assumeTrue = !assumeTrue;
                 }
                 if (assumeTrue) {
-                    return getUnionType(filter((<UnionType>type).types, t => areTypesComparable(getTypeOfPropertyOfType(t, propName), discriminantType)));
+                    return filterType(type, t => areTypesComparable(getTypeOfPropertyOfType(t, propName), discriminantType));
                 }
                 if (discriminantType.flags & TypeFlags.StringLiteral) {
-                    return getUnionType(filter((<UnionType>type).types, t => getTypeOfPropertyOfType(t, propName) !== discriminantType));
+                    return filterType(type, t => getTypeOfPropertyOfType(t, propName) !== discriminantType);
                 }
                 return type;
             }
 
             function narrowTypeBySwitchOnDiscriminant(type: Type, switchStatement: SwitchStatement, clauseStart: number, clauseEnd: number) {
                 // We have switch statement with property access expression
-                if (!(type.flags & TypeFlags.Union) || !isMatchingReference(reference, (<PropertyAccessExpression>switchStatement.expression).expression)) {
+                if (!isMatchingReference(reference, (<PropertyAccessExpression>switchStatement.expression).expression)) {
                     return type;
                 }
                 const propName = (<PropertyAccessExpression>switchStatement.expression).name.text;
@@ -7983,16 +7989,15 @@ namespace ts {
                 if (!switchTypes.length) {
                     return type;
                 }
-                const types = (<UnionType>type).types;
                 const clauseTypes = switchTypes.slice(clauseStart, clauseEnd);
                 const hasDefaultClause = clauseStart === clauseEnd || contains(clauseTypes, undefined);
                 const caseTypes = hasDefaultClause ? filter(clauseTypes, t => !!t) : clauseTypes;
                 const discriminantType = caseTypes.length ? getUnionType(caseTypes) : undefined;
-                const caseType = discriminantType && getUnionType(filter(types, t => isTypeComparableTo(discriminantType, getTypeOfPropertyOfType(t, propName))));
+                const caseType = discriminantType && filterType(type, t => isTypeComparableTo(discriminantType, getTypeOfPropertyOfType(t, propName)));
                 if (!hasDefaultClause) {
                     return caseType;
                 }
-                const defaultType = getUnionType(filter(types, t => !eachTypeContainedIn(getTypeOfPropertyOfType(t, propName), switchTypes)));
+                const defaultType = filterType(type, t => !eachTypeContainedIn(getTypeOfPropertyOfType(t, propName), switchTypes));
                 return caseType ? getUnionType([caseType, defaultType]) : defaultType;
             }
 

From 5ff7c29d40f0b1f99b3b5513624eb0adaee74cfb Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Tue, 14 Jun 2016 09:33:56 -0700
Subject: [PATCH 287/332] Add tests

---
 .../reference/discriminatedUnionTypes1.js     | 252 ++++++++++
 .../discriminatedUnionTypes1.symbols          | 402 +++++++++++++++
 .../reference/discriminatedUnionTypes1.types  | 465 ++++++++++++++++++
 .../types/union/discriminatedUnionTypes1.ts   | 142 ++++++
 4 files changed, 1261 insertions(+)
 create mode 100644 tests/baselines/reference/discriminatedUnionTypes1.js
 create mode 100644 tests/baselines/reference/discriminatedUnionTypes1.symbols
 create mode 100644 tests/baselines/reference/discriminatedUnionTypes1.types
 create mode 100644 tests/cases/conformance/types/union/discriminatedUnionTypes1.ts

diff --git a/tests/baselines/reference/discriminatedUnionTypes1.js b/tests/baselines/reference/discriminatedUnionTypes1.js
new file mode 100644
index 00000000000..8679689569a
--- /dev/null
+++ b/tests/baselines/reference/discriminatedUnionTypes1.js
@@ -0,0 +1,252 @@
+//// [discriminatedUnionTypes1.ts]
+interface Square {
+    kind: "square";
+    size: number;
+}
+
+interface Rectangle {
+    kind: "rectangle";
+    width: number;
+    height: number;
+}
+
+interface Circle {
+    kind: "circle";
+    radius: number;
+}
+
+type Shape = Square | Rectangle | Circle;
+
+function area1(s: Shape) {
+    if (s.kind === "square") {
+        return s.size * s.size;
+    }
+    else if (s.kind === "circle") {
+        return Math.PI * s.radius * s.radius;
+    }
+    else if (s.kind === "rectangle") {
+        return s.width * s.height;
+    }
+    else {
+        return 0;
+    }
+}
+
+function area2(s: Shape) {
+    switch (s.kind) {
+        case "square": return s.size * s.size;
+        case "rectangle": return s.width * s.height;
+        case "circle": return Math.PI * s.radius * s.radius;
+    }
+}
+
+function assertNever(x: never): never {
+    throw new Error("Unexpected object: " + x);
+}
+
+function area3(s: Shape) {
+    switch (s.kind) {
+        case "square": return s.size * s.size;
+        case "rectangle": return s.width * s.height;
+        case "circle": return Math.PI * s.radius * s.radius;
+        default: return assertNever(s);
+    }
+}
+
+function area4(s: Shape) {
+    switch (s.kind) {
+        case "square": return s.size * s.size;
+        case "rectangle": return s.width * s.height;
+        case "circle": return Math.PI * s.radius * s.radius;
+    }
+    return assertNever(s);
+}
+
+type Message =
+    { kind: "A", x: string } |
+    { kind: "B" | "C", y: number } |
+    { kind: "D" };
+
+function f1(m: Message) {
+    if (m.kind === "A") {
+        m;  // { kind: "A", x: string }
+    }
+    else if (m.kind === "D") {
+        m;  // { kind: "D" }
+    }
+    else {
+        m;  // { kind: "B" | "C", y: number }
+    }
+}
+
+function f2(m: Message) {
+    if (m.kind === "A") {
+        return;
+    }
+    m;  // { kind: "B" | "C", y: number } | { kind: "D" }
+}
+
+function f3(m: Message) {
+    if (m.kind === "X") {
+        m;  // never
+    }
+}
+
+function f4(m: Message, x: "A" | "D") {
+    if (m.kind == x) {
+        m;  // { kind: "A", x: string } | { kind: "D" }
+    }
+}
+
+function f5(m: Message) {
+    switch (m.kind) {
+        case "A":
+            m;  // { kind: "A", x: string }
+            break;
+        case "D":
+            m;  // { kind: "D" }
+            break;
+        default:
+            m;  // { kind: "B" | "C", y: number }
+    }
+}
+
+function f6(m: Message) {
+    switch (m.kind) {
+        case "A":
+            m;  // { kind: "A", x: string }
+        case "D":
+            m;  // { kind: "A", x: string } | { kind: "D" }
+            break;
+        default:
+            m;  // { kind: "B" | "C", y: number }
+    }
+}
+
+function f7(m: Message) {
+    switch (m.kind) {
+        case "A":
+        case "B":
+            return;
+    }
+    m;  // { kind: "B" | "C", y: number } | { kind: "D" }
+}
+
+function f8(m: Message) {
+    switch (m.kind) {
+        case "A":
+            return;
+        case "D":
+            throw new Error();
+    }
+    m;  // { kind: "B" | "C", y: number }
+}
+
+//// [discriminatedUnionTypes1.js]
+function area1(s) {
+    if (s.kind === "square") {
+        return s.size * s.size;
+    }
+    else if (s.kind === "circle") {
+        return Math.PI * s.radius * s.radius;
+    }
+    else if (s.kind === "rectangle") {
+        return s.width * s.height;
+    }
+    else {
+        return 0;
+    }
+}
+function area2(s) {
+    switch (s.kind) {
+        case "square": return s.size * s.size;
+        case "rectangle": return s.width * s.height;
+        case "circle": return Math.PI * s.radius * s.radius;
+    }
+}
+function assertNever(x) {
+    throw new Error("Unexpected object: " + x);
+}
+function area3(s) {
+    switch (s.kind) {
+        case "square": return s.size * s.size;
+        case "rectangle": return s.width * s.height;
+        case "circle": return Math.PI * s.radius * s.radius;
+        default: return assertNever(s);
+    }
+}
+function area4(s) {
+    switch (s.kind) {
+        case "square": return s.size * s.size;
+        case "rectangle": return s.width * s.height;
+        case "circle": return Math.PI * s.radius * s.radius;
+    }
+    return assertNever(s);
+}
+function f1(m) {
+    if (m.kind === "A") {
+        m; // { kind: "A", x: string }
+    }
+    else if (m.kind === "D") {
+        m; // { kind: "D" }
+    }
+    else {
+        m; // { kind: "B" | "C", y: number }
+    }
+}
+function f2(m) {
+    if (m.kind === "A") {
+        return;
+    }
+    m; // { kind: "B" | "C", y: number } | { kind: "D" }
+}
+function f3(m) {
+    if (m.kind === "X") {
+        m; // never
+    }
+}
+function f4(m, x) {
+    if (m.kind == x) {
+        m; // { kind: "A", x: string } | { kind: "D" }
+    }
+}
+function f5(m) {
+    switch (m.kind) {
+        case "A":
+            m; // { kind: "A", x: string }
+            break;
+        case "D":
+            m; // { kind: "D" }
+            break;
+        default:
+            m; // { kind: "B" | "C", y: number }
+    }
+}
+function f6(m) {
+    switch (m.kind) {
+        case "A":
+            m; // { kind: "A", x: string }
+        case "D":
+            m; // { kind: "A", x: string } | { kind: "D" }
+            break;
+        default:
+            m; // { kind: "B" | "C", y: number }
+    }
+}
+function f7(m) {
+    switch (m.kind) {
+        case "A":
+        case "B":
+            return;
+    }
+    m; // { kind: "B" | "C", y: number } | { kind: "D" }
+}
+function f8(m) {
+    switch (m.kind) {
+        case "A":
+            return;
+        case "D":
+            throw new Error();
+    }
+    m; // { kind: "B" | "C", y: number }
+}
diff --git a/tests/baselines/reference/discriminatedUnionTypes1.symbols b/tests/baselines/reference/discriminatedUnionTypes1.symbols
new file mode 100644
index 00000000000..38069447423
--- /dev/null
+++ b/tests/baselines/reference/discriminatedUnionTypes1.symbols
@@ -0,0 +1,402 @@
+=== tests/cases/conformance/types/union/discriminatedUnionTypes1.ts ===
+interface Square {
+>Square : Symbol(Square, Decl(discriminatedUnionTypes1.ts, 0, 0))
+
+    kind: "square";
+>kind : Symbol(Square.kind, Decl(discriminatedUnionTypes1.ts, 0, 18))
+
+    size: number;
+>size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+}
+
+interface Rectangle {
+>Rectangle : Symbol(Rectangle, Decl(discriminatedUnionTypes1.ts, 3, 1))
+
+    kind: "rectangle";
+>kind : Symbol(Rectangle.kind, Decl(discriminatedUnionTypes1.ts, 5, 21))
+
+    width: number;
+>width : Symbol(Rectangle.width, Decl(discriminatedUnionTypes1.ts, 6, 22))
+
+    height: number;
+>height : Symbol(Rectangle.height, Decl(discriminatedUnionTypes1.ts, 7, 18))
+}
+
+interface Circle {
+>Circle : Symbol(Circle, Decl(discriminatedUnionTypes1.ts, 9, 1))
+
+    kind: "circle";
+>kind : Symbol(Circle.kind, Decl(discriminatedUnionTypes1.ts, 11, 18))
+
+    radius: number;
+>radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+}
+
+type Shape = Square | Rectangle | Circle;
+>Shape : Symbol(Shape, Decl(discriminatedUnionTypes1.ts, 14, 1))
+>Square : Symbol(Square, Decl(discriminatedUnionTypes1.ts, 0, 0))
+>Rectangle : Symbol(Rectangle, Decl(discriminatedUnionTypes1.ts, 3, 1))
+>Circle : Symbol(Circle, Decl(discriminatedUnionTypes1.ts, 9, 1))
+
+function area1(s: Shape) {
+>area1 : Symbol(area1, Decl(discriminatedUnionTypes1.ts, 16, 41))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 18, 15))
+>Shape : Symbol(Shape, Decl(discriminatedUnionTypes1.ts, 14, 1))
+
+    if (s.kind === "square") {
+>s.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 0, 18), Decl(discriminatedUnionTypes1.ts, 5, 21), Decl(discriminatedUnionTypes1.ts, 11, 18))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 18, 15))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 0, 18), Decl(discriminatedUnionTypes1.ts, 5, 21), Decl(discriminatedUnionTypes1.ts, 11, 18))
+
+        return s.size * s.size;
+>s.size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 18, 15))
+>size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+>s.size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 18, 15))
+>size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+    }
+    else if (s.kind === "circle") {
+>s.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 5, 21), Decl(discriminatedUnionTypes1.ts, 11, 18))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 18, 15))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 5, 21), Decl(discriminatedUnionTypes1.ts, 11, 18))
+
+        return Math.PI * s.radius * s.radius;
+>Math.PI : Symbol(Math.PI, Decl(lib.d.ts, --, --))
+>Math : Symbol(Math, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>PI : Symbol(Math.PI, Decl(lib.d.ts, --, --))
+>s.radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 18, 15))
+>radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+>s.radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 18, 15))
+>radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+    }
+    else if (s.kind === "rectangle") {
+>s.kind : Symbol(Rectangle.kind, Decl(discriminatedUnionTypes1.ts, 5, 21))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 18, 15))
+>kind : Symbol(Rectangle.kind, Decl(discriminatedUnionTypes1.ts, 5, 21))
+
+        return s.width * s.height;
+>s.width : Symbol(Rectangle.width, Decl(discriminatedUnionTypes1.ts, 6, 22))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 18, 15))
+>width : Symbol(Rectangle.width, Decl(discriminatedUnionTypes1.ts, 6, 22))
+>s.height : Symbol(Rectangle.height, Decl(discriminatedUnionTypes1.ts, 7, 18))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 18, 15))
+>height : Symbol(Rectangle.height, Decl(discriminatedUnionTypes1.ts, 7, 18))
+    }
+    else {
+        return 0;
+    }
+}
+
+function area2(s: Shape) {
+>area2 : Symbol(area2, Decl(discriminatedUnionTypes1.ts, 31, 1))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 33, 15))
+>Shape : Symbol(Shape, Decl(discriminatedUnionTypes1.ts, 14, 1))
+
+    switch (s.kind) {
+>s.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 0, 18), Decl(discriminatedUnionTypes1.ts, 5, 21), Decl(discriminatedUnionTypes1.ts, 11, 18))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 33, 15))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 0, 18), Decl(discriminatedUnionTypes1.ts, 5, 21), Decl(discriminatedUnionTypes1.ts, 11, 18))
+
+        case "square": return s.size * s.size;
+>s.size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 33, 15))
+>size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+>s.size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 33, 15))
+>size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+
+        case "rectangle": return s.width * s.height;
+>s.width : Symbol(Rectangle.width, Decl(discriminatedUnionTypes1.ts, 6, 22))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 33, 15))
+>width : Symbol(Rectangle.width, Decl(discriminatedUnionTypes1.ts, 6, 22))
+>s.height : Symbol(Rectangle.height, Decl(discriminatedUnionTypes1.ts, 7, 18))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 33, 15))
+>height : Symbol(Rectangle.height, Decl(discriminatedUnionTypes1.ts, 7, 18))
+
+        case "circle": return Math.PI * s.radius * s.radius;
+>Math.PI : Symbol(Math.PI, Decl(lib.d.ts, --, --))
+>Math : Symbol(Math, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>PI : Symbol(Math.PI, Decl(lib.d.ts, --, --))
+>s.radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 33, 15))
+>radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+>s.radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 33, 15))
+>radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+    }
+}
+
+function assertNever(x: never): never {
+>assertNever : Symbol(assertNever, Decl(discriminatedUnionTypes1.ts, 39, 1))
+>x : Symbol(x, Decl(discriminatedUnionTypes1.ts, 41, 21))
+
+    throw new Error("Unexpected object: " + x);
+>Error : Symbol(Error, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>x : Symbol(x, Decl(discriminatedUnionTypes1.ts, 41, 21))
+}
+
+function area3(s: Shape) {
+>area3 : Symbol(area3, Decl(discriminatedUnionTypes1.ts, 43, 1))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 45, 15))
+>Shape : Symbol(Shape, Decl(discriminatedUnionTypes1.ts, 14, 1))
+
+    switch (s.kind) {
+>s.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 0, 18), Decl(discriminatedUnionTypes1.ts, 5, 21), Decl(discriminatedUnionTypes1.ts, 11, 18))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 45, 15))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 0, 18), Decl(discriminatedUnionTypes1.ts, 5, 21), Decl(discriminatedUnionTypes1.ts, 11, 18))
+
+        case "square": return s.size * s.size;
+>s.size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 45, 15))
+>size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+>s.size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 45, 15))
+>size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+
+        case "rectangle": return s.width * s.height;
+>s.width : Symbol(Rectangle.width, Decl(discriminatedUnionTypes1.ts, 6, 22))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 45, 15))
+>width : Symbol(Rectangle.width, Decl(discriminatedUnionTypes1.ts, 6, 22))
+>s.height : Symbol(Rectangle.height, Decl(discriminatedUnionTypes1.ts, 7, 18))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 45, 15))
+>height : Symbol(Rectangle.height, Decl(discriminatedUnionTypes1.ts, 7, 18))
+
+        case "circle": return Math.PI * s.radius * s.radius;
+>Math.PI : Symbol(Math.PI, Decl(lib.d.ts, --, --))
+>Math : Symbol(Math, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>PI : Symbol(Math.PI, Decl(lib.d.ts, --, --))
+>s.radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 45, 15))
+>radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+>s.radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 45, 15))
+>radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+
+        default: return assertNever(s);
+>assertNever : Symbol(assertNever, Decl(discriminatedUnionTypes1.ts, 39, 1))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 45, 15))
+    }
+}
+
+function area4(s: Shape) {
+>area4 : Symbol(area4, Decl(discriminatedUnionTypes1.ts, 52, 1))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 54, 15))
+>Shape : Symbol(Shape, Decl(discriminatedUnionTypes1.ts, 14, 1))
+
+    switch (s.kind) {
+>s.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 0, 18), Decl(discriminatedUnionTypes1.ts, 5, 21), Decl(discriminatedUnionTypes1.ts, 11, 18))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 54, 15))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 0, 18), Decl(discriminatedUnionTypes1.ts, 5, 21), Decl(discriminatedUnionTypes1.ts, 11, 18))
+
+        case "square": return s.size * s.size;
+>s.size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 54, 15))
+>size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+>s.size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 54, 15))
+>size : Symbol(Square.size, Decl(discriminatedUnionTypes1.ts, 1, 19))
+
+        case "rectangle": return s.width * s.height;
+>s.width : Symbol(Rectangle.width, Decl(discriminatedUnionTypes1.ts, 6, 22))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 54, 15))
+>width : Symbol(Rectangle.width, Decl(discriminatedUnionTypes1.ts, 6, 22))
+>s.height : Symbol(Rectangle.height, Decl(discriminatedUnionTypes1.ts, 7, 18))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 54, 15))
+>height : Symbol(Rectangle.height, Decl(discriminatedUnionTypes1.ts, 7, 18))
+
+        case "circle": return Math.PI * s.radius * s.radius;
+>Math.PI : Symbol(Math.PI, Decl(lib.d.ts, --, --))
+>Math : Symbol(Math, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>PI : Symbol(Math.PI, Decl(lib.d.ts, --, --))
+>s.radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 54, 15))
+>radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+>s.radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 54, 15))
+>radius : Symbol(Circle.radius, Decl(discriminatedUnionTypes1.ts, 12, 19))
+    }
+    return assertNever(s);
+>assertNever : Symbol(assertNever, Decl(discriminatedUnionTypes1.ts, 39, 1))
+>s : Symbol(s, Decl(discriminatedUnionTypes1.ts, 54, 15))
+}
+
+type Message =
+>Message : Symbol(Message, Decl(discriminatedUnionTypes1.ts, 61, 1))
+
+    { kind: "A", x: string } |
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5))
+>x : Symbol(x, Decl(discriminatedUnionTypes1.ts, 64, 16))
+
+    { kind: "B" | "C", y: number } |
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 65, 5))
+>y : Symbol(y, Decl(discriminatedUnionTypes1.ts, 65, 22))
+
+    { kind: "D" };
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 66, 5))
+
+function f1(m: Message) {
+>f1 : Symbol(f1, Decl(discriminatedUnionTypes1.ts, 66, 18))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 68, 12))
+>Message : Symbol(Message, Decl(discriminatedUnionTypes1.ts, 61, 1))
+
+    if (m.kind === "A") {
+>m.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 68, 12))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+
+        m;  // { kind: "A", x: string }
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 68, 12))
+    }
+    else if (m.kind === "D") {
+>m.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 68, 12))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+
+        m;  // { kind: "D" }
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 68, 12))
+    }
+    else {
+        m;  // { kind: "B" | "C", y: number }
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 68, 12))
+    }
+}
+
+function f2(m: Message) {
+>f2 : Symbol(f2, Decl(discriminatedUnionTypes1.ts, 78, 1))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 80, 12))
+>Message : Symbol(Message, Decl(discriminatedUnionTypes1.ts, 61, 1))
+
+    if (m.kind === "A") {
+>m.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 80, 12))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+
+        return;
+    }
+    m;  // { kind: "B" | "C", y: number } | { kind: "D" }
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 80, 12))
+}
+
+function f3(m: Message) {
+>f3 : Symbol(f3, Decl(discriminatedUnionTypes1.ts, 85, 1))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 87, 12))
+>Message : Symbol(Message, Decl(discriminatedUnionTypes1.ts, 61, 1))
+
+    if (m.kind === "X") {
+>m.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 87, 12))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+
+        m;  // never
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 87, 12))
+    }
+}
+
+function f4(m: Message, x: "A" | "D") {
+>f4 : Symbol(f4, Decl(discriminatedUnionTypes1.ts, 91, 1))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 93, 12))
+>Message : Symbol(Message, Decl(discriminatedUnionTypes1.ts, 61, 1))
+>x : Symbol(x, Decl(discriminatedUnionTypes1.ts, 93, 23))
+
+    if (m.kind == x) {
+>m.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 93, 12))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+>x : Symbol(x, Decl(discriminatedUnionTypes1.ts, 93, 23))
+
+        m;  // { kind: "A", x: string } | { kind: "D" }
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 93, 12))
+    }
+}
+
+function f5(m: Message) {
+>f5 : Symbol(f5, Decl(discriminatedUnionTypes1.ts, 97, 1))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 99, 12))
+>Message : Symbol(Message, Decl(discriminatedUnionTypes1.ts, 61, 1))
+
+    switch (m.kind) {
+>m.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 99, 12))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+
+        case "A":
+            m;  // { kind: "A", x: string }
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 99, 12))
+
+            break;
+        case "D":
+            m;  // { kind: "D" }
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 99, 12))
+
+            break;
+        default:
+            m;  // { kind: "B" | "C", y: number }
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 99, 12))
+    }
+}
+
+function f6(m: Message) {
+>f6 : Symbol(f6, Decl(discriminatedUnionTypes1.ts, 110, 1))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 112, 12))
+>Message : Symbol(Message, Decl(discriminatedUnionTypes1.ts, 61, 1))
+
+    switch (m.kind) {
+>m.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 112, 12))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+
+        case "A":
+            m;  // { kind: "A", x: string }
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 112, 12))
+
+        case "D":
+            m;  // { kind: "A", x: string } | { kind: "D" }
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 112, 12))
+
+            break;
+        default:
+            m;  // { kind: "B" | "C", y: number }
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 112, 12))
+    }
+}
+
+function f7(m: Message) {
+>f7 : Symbol(f7, Decl(discriminatedUnionTypes1.ts, 122, 1))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 124, 12))
+>Message : Symbol(Message, Decl(discriminatedUnionTypes1.ts, 61, 1))
+
+    switch (m.kind) {
+>m.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 124, 12))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+
+        case "A":
+        case "B":
+            return;
+    }
+    m;  // { kind: "B" | "C", y: number } | { kind: "D" }
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 124, 12))
+}
+
+function f8(m: Message) {
+>f8 : Symbol(f8, Decl(discriminatedUnionTypes1.ts, 131, 1))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 133, 12))
+>Message : Symbol(Message, Decl(discriminatedUnionTypes1.ts, 61, 1))
+
+    switch (m.kind) {
+>m.kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 133, 12))
+>kind : Symbol(kind, Decl(discriminatedUnionTypes1.ts, 64, 5), Decl(discriminatedUnionTypes1.ts, 65, 5), Decl(discriminatedUnionTypes1.ts, 66, 5))
+
+        case "A":
+            return;
+        case "D":
+            throw new Error();
+>Error : Symbol(Error, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+    }
+    m;  // { kind: "B" | "C", y: number }
+>m : Symbol(m, Decl(discriminatedUnionTypes1.ts, 133, 12))
+}
diff --git a/tests/baselines/reference/discriminatedUnionTypes1.types b/tests/baselines/reference/discriminatedUnionTypes1.types
new file mode 100644
index 00000000000..234de28eaba
--- /dev/null
+++ b/tests/baselines/reference/discriminatedUnionTypes1.types
@@ -0,0 +1,465 @@
+=== tests/cases/conformance/types/union/discriminatedUnionTypes1.ts ===
+interface Square {
+>Square : Square
+
+    kind: "square";
+>kind : "square"
+
+    size: number;
+>size : number
+}
+
+interface Rectangle {
+>Rectangle : Rectangle
+
+    kind: "rectangle";
+>kind : "rectangle"
+
+    width: number;
+>width : number
+
+    height: number;
+>height : number
+}
+
+interface Circle {
+>Circle : Circle
+
+    kind: "circle";
+>kind : "circle"
+
+    radius: number;
+>radius : number
+}
+
+type Shape = Square | Rectangle | Circle;
+>Shape : Square | Rectangle | Circle
+>Square : Square
+>Rectangle : Rectangle
+>Circle : Circle
+
+function area1(s: Shape) {
+>area1 : (s: Square | Rectangle | Circle) => number
+>s : Square | Rectangle | Circle
+>Shape : Square | Rectangle | Circle
+
+    if (s.kind === "square") {
+>s.kind === "square" : boolean
+>s.kind : "square" | "rectangle" | "circle"
+>s : Square | Rectangle | Circle
+>kind : "square" | "rectangle" | "circle"
+>"square" : string
+
+        return s.size * s.size;
+>s.size * s.size : number
+>s.size : number
+>s : Square
+>size : number
+>s.size : number
+>s : Square
+>size : number
+    }
+    else if (s.kind === "circle") {
+>s.kind === "circle" : boolean
+>s.kind : "rectangle" | "circle"
+>s : Rectangle | Circle
+>kind : "rectangle" | "circle"
+>"circle" : string
+
+        return Math.PI * s.radius * s.radius;
+>Math.PI * s.radius * s.radius : number
+>Math.PI * s.radius : number
+>Math.PI : number
+>Math : Math
+>PI : number
+>s.radius : number
+>s : Circle
+>radius : number
+>s.radius : number
+>s : Circle
+>radius : number
+    }
+    else if (s.kind === "rectangle") {
+>s.kind === "rectangle" : boolean
+>s.kind : "rectangle"
+>s : Rectangle
+>kind : "rectangle"
+>"rectangle" : string
+
+        return s.width * s.height;
+>s.width * s.height : number
+>s.width : number
+>s : Rectangle
+>width : number
+>s.height : number
+>s : Rectangle
+>height : number
+    }
+    else {
+        return 0;
+>0 : number
+    }
+}
+
+function area2(s: Shape) {
+>area2 : (s: Square | Rectangle | Circle) => number
+>s : Square | Rectangle | Circle
+>Shape : Square | Rectangle | Circle
+
+    switch (s.kind) {
+>s.kind : "square" | "rectangle" | "circle"
+>s : Square | Rectangle | Circle
+>kind : "square" | "rectangle" | "circle"
+
+        case "square": return s.size * s.size;
+>"square" : string
+>s.size * s.size : number
+>s.size : number
+>s : Square
+>size : number
+>s.size : number
+>s : Square
+>size : number
+
+        case "rectangle": return s.width * s.height;
+>"rectangle" : string
+>s.width * s.height : number
+>s.width : number
+>s : Rectangle
+>width : number
+>s.height : number
+>s : Rectangle
+>height : number
+
+        case "circle": return Math.PI * s.radius * s.radius;
+>"circle" : string
+>Math.PI * s.radius * s.radius : number
+>Math.PI * s.radius : number
+>Math.PI : number
+>Math : Math
+>PI : number
+>s.radius : number
+>s : Circle
+>radius : number
+>s.radius : number
+>s : Circle
+>radius : number
+    }
+}
+
+function assertNever(x: never): never {
+>assertNever : (x: never) => never
+>x : never
+
+    throw new Error("Unexpected object: " + x);
+>new Error("Unexpected object: " + x) : Error
+>Error : ErrorConstructor
+>"Unexpected object: " + x : string
+>"Unexpected object: " : string
+>x : never
+}
+
+function area3(s: Shape) {
+>area3 : (s: Square | Rectangle | Circle) => number
+>s : Square | Rectangle | Circle
+>Shape : Square | Rectangle | Circle
+
+    switch (s.kind) {
+>s.kind : "square" | "rectangle" | "circle"
+>s : Square | Rectangle | Circle
+>kind : "square" | "rectangle" | "circle"
+
+        case "square": return s.size * s.size;
+>"square" : string
+>s.size * s.size : number
+>s.size : number
+>s : Square
+>size : number
+>s.size : number
+>s : Square
+>size : number
+
+        case "rectangle": return s.width * s.height;
+>"rectangle" : string
+>s.width * s.height : number
+>s.width : number
+>s : Rectangle
+>width : number
+>s.height : number
+>s : Rectangle
+>height : number
+
+        case "circle": return Math.PI * s.radius * s.radius;
+>"circle" : string
+>Math.PI * s.radius * s.radius : number
+>Math.PI * s.radius : number
+>Math.PI : number
+>Math : Math
+>PI : number
+>s.radius : number
+>s : Circle
+>radius : number
+>s.radius : number
+>s : Circle
+>radius : number
+
+        default: return assertNever(s);
+>assertNever(s) : never
+>assertNever : (x: never) => never
+>s : never
+    }
+}
+
+function area4(s: Shape) {
+>area4 : (s: Square | Rectangle | Circle) => number
+>s : Square | Rectangle | Circle
+>Shape : Square | Rectangle | Circle
+
+    switch (s.kind) {
+>s.kind : "square" | "rectangle" | "circle"
+>s : Square | Rectangle | Circle
+>kind : "square" | "rectangle" | "circle"
+
+        case "square": return s.size * s.size;
+>"square" : string
+>s.size * s.size : number
+>s.size : number
+>s : Square
+>size : number
+>s.size : number
+>s : Square
+>size : number
+
+        case "rectangle": return s.width * s.height;
+>"rectangle" : string
+>s.width * s.height : number
+>s.width : number
+>s : Rectangle
+>width : number
+>s.height : number
+>s : Rectangle
+>height : number
+
+        case "circle": return Math.PI * s.radius * s.radius;
+>"circle" : string
+>Math.PI * s.radius * s.radius : number
+>Math.PI * s.radius : number
+>Math.PI : number
+>Math : Math
+>PI : number
+>s.radius : number
+>s : Circle
+>radius : number
+>s.radius : number
+>s : Circle
+>radius : number
+    }
+    return assertNever(s);
+>assertNever(s) : never
+>assertNever : (x: never) => never
+>s : never
+}
+
+type Message =
+>Message : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+
+    { kind: "A", x: string } |
+>kind : "A"
+>x : string
+
+    { kind: "B" | "C", y: number } |
+>kind : "B" | "C"
+>y : number
+
+    { kind: "D" };
+>kind : "D"
+
+function f1(m: Message) {
+>f1 : (m: { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }) => void
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>Message : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+
+    if (m.kind === "A") {
+>m.kind === "A" : boolean
+>m.kind : "A" | "B" | "C" | "D"
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>kind : "A" | "B" | "C" | "D"
+>"A" : string
+
+        m;  // { kind: "A", x: string }
+>m : { kind: "A"; x: string; }
+    }
+    else if (m.kind === "D") {
+>m.kind === "D" : boolean
+>m.kind : "B" | "C" | "D"
+>m : { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>kind : "B" | "C" | "D"
+>"D" : string
+
+        m;  // { kind: "D" }
+>m : { kind: "D"; }
+    }
+    else {
+        m;  // { kind: "B" | "C", y: number }
+>m : { kind: "B" | "C"; y: number; }
+    }
+}
+
+function f2(m: Message) {
+>f2 : (m: { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }) => void
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>Message : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+
+    if (m.kind === "A") {
+>m.kind === "A" : boolean
+>m.kind : "A" | "B" | "C" | "D"
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>kind : "A" | "B" | "C" | "D"
+>"A" : string
+
+        return;
+    }
+    m;  // { kind: "B" | "C", y: number } | { kind: "D" }
+>m : { kind: "B" | "C"; y: number; } | { kind: "D"; }
+}
+
+function f3(m: Message) {
+>f3 : (m: { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }) => void
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>Message : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+
+    if (m.kind === "X") {
+>m.kind === "X" : boolean
+>m.kind : "A" | "B" | "C" | "D"
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>kind : "A" | "B" | "C" | "D"
+>"X" : string
+
+        m;  // never
+>m : never
+    }
+}
+
+function f4(m: Message, x: "A" | "D") {
+>f4 : (m: { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }, x: "A" | "D") => void
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>Message : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>x : "A" | "D"
+
+    if (m.kind == x) {
+>m.kind == x : boolean
+>m.kind : "A" | "B" | "C" | "D"
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>kind : "A" | "B" | "C" | "D"
+>x : "A" | "D"
+
+        m;  // { kind: "A", x: string } | { kind: "D" }
+>m : { kind: "A"; x: string; } | { kind: "D"; }
+    }
+}
+
+function f5(m: Message) {
+>f5 : (m: { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }) => void
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>Message : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+
+    switch (m.kind) {
+>m.kind : "A" | "B" | "C" | "D"
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>kind : "A" | "B" | "C" | "D"
+
+        case "A":
+>"A" : string
+
+            m;  // { kind: "A", x: string }
+>m : { kind: "A"; x: string; }
+
+            break;
+        case "D":
+>"D" : string
+
+            m;  // { kind: "D" }
+>m : { kind: "D"; }
+
+            break;
+        default:
+            m;  // { kind: "B" | "C", y: number }
+>m : { kind: "B" | "C"; y: number; }
+    }
+}
+
+function f6(m: Message) {
+>f6 : (m: { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }) => void
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>Message : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+
+    switch (m.kind) {
+>m.kind : "A" | "B" | "C" | "D"
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>kind : "A" | "B" | "C" | "D"
+
+        case "A":
+>"A" : string
+
+            m;  // { kind: "A", x: string }
+>m : { kind: "A"; x: string; }
+
+        case "D":
+>"D" : string
+
+            m;  // { kind: "A", x: string } | { kind: "D" }
+>m : { kind: "D"; } | { kind: "A"; x: string; }
+
+            break;
+        default:
+            m;  // { kind: "B" | "C", y: number }
+>m : { kind: "B" | "C"; y: number; }
+    }
+}
+
+function f7(m: Message) {
+>f7 : (m: { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }) => void
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>Message : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+
+    switch (m.kind) {
+>m.kind : "A" | "B" | "C" | "D"
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>kind : "A" | "B" | "C" | "D"
+
+        case "A":
+>"A" : string
+
+        case "B":
+>"B" : string
+
+            return;
+    }
+    m;  // { kind: "B" | "C", y: number } | { kind: "D" }
+>m : { kind: "B" | "C"; y: number; } | { kind: "D"; }
+}
+
+function f8(m: Message) {
+>f8 : (m: { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }) => void
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>Message : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+
+    switch (m.kind) {
+>m.kind : "A" | "B" | "C" | "D"
+>m : { kind: "A"; x: string; } | { kind: "B" | "C"; y: number; } | { kind: "D"; }
+>kind : "A" | "B" | "C" | "D"
+
+        case "A":
+>"A" : string
+
+            return;
+        case "D":
+>"D" : string
+
+            throw new Error();
+>new Error() : Error
+>Error : ErrorConstructor
+    }
+    m;  // { kind: "B" | "C", y: number }
+>m : { kind: "B" | "C"; y: number; }
+}
diff --git a/tests/cases/conformance/types/union/discriminatedUnionTypes1.ts b/tests/cases/conformance/types/union/discriminatedUnionTypes1.ts
new file mode 100644
index 00000000000..404162308b9
--- /dev/null
+++ b/tests/cases/conformance/types/union/discriminatedUnionTypes1.ts
@@ -0,0 +1,142 @@
+interface Square {
+    kind: "square";
+    size: number;
+}
+
+interface Rectangle {
+    kind: "rectangle";
+    width: number;
+    height: number;
+}
+
+interface Circle {
+    kind: "circle";
+    radius: number;
+}
+
+type Shape = Square | Rectangle | Circle;
+
+function area1(s: Shape) {
+    if (s.kind === "square") {
+        return s.size * s.size;
+    }
+    else if (s.kind === "circle") {
+        return Math.PI * s.radius * s.radius;
+    }
+    else if (s.kind === "rectangle") {
+        return s.width * s.height;
+    }
+    else {
+        return 0;
+    }
+}
+
+function area2(s: Shape) {
+    switch (s.kind) {
+        case "square": return s.size * s.size;
+        case "rectangle": return s.width * s.height;
+        case "circle": return Math.PI * s.radius * s.radius;
+    }
+}
+
+function assertNever(x: never): never {
+    throw new Error("Unexpected object: " + x);
+}
+
+function area3(s: Shape) {
+    switch (s.kind) {
+        case "square": return s.size * s.size;
+        case "rectangle": return s.width * s.height;
+        case "circle": return Math.PI * s.radius * s.radius;
+        default: return assertNever(s);
+    }
+}
+
+function area4(s: Shape) {
+    switch (s.kind) {
+        case "square": return s.size * s.size;
+        case "rectangle": return s.width * s.height;
+        case "circle": return Math.PI * s.radius * s.radius;
+    }
+    return assertNever(s);
+}
+
+type Message =
+    { kind: "A", x: string } |
+    { kind: "B" | "C", y: number } |
+    { kind: "D" };
+
+function f1(m: Message) {
+    if (m.kind === "A") {
+        m;  // { kind: "A", x: string }
+    }
+    else if (m.kind === "D") {
+        m;  // { kind: "D" }
+    }
+    else {
+        m;  // { kind: "B" | "C", y: number }
+    }
+}
+
+function f2(m: Message) {
+    if (m.kind === "A") {
+        return;
+    }
+    m;  // { kind: "B" | "C", y: number } | { kind: "D" }
+}
+
+function f3(m: Message) {
+    if (m.kind === "X") {
+        m;  // never
+    }
+}
+
+function f4(m: Message, x: "A" | "D") {
+    if (m.kind == x) {
+        m;  // { kind: "A", x: string } | { kind: "D" }
+    }
+}
+
+function f5(m: Message) {
+    switch (m.kind) {
+        case "A":
+            m;  // { kind: "A", x: string }
+            break;
+        case "D":
+            m;  // { kind: "D" }
+            break;
+        default:
+            m;  // { kind: "B" | "C", y: number }
+    }
+}
+
+function f6(m: Message) {
+    switch (m.kind) {
+        case "A":
+            m;  // { kind: "A", x: string }
+        case "D":
+            m;  // { kind: "A", x: string } | { kind: "D" }
+            break;
+        default:
+            m;  // { kind: "B" | "C", y: number }
+    }
+}
+
+function f7(m: Message) {
+    switch (m.kind) {
+        case "A":
+        case "B":
+            return;
+    }
+    m;  // { kind: "B" | "C", y: number } | { kind: "D" }
+}
+
+function f8(m: Message) {
+    switch (m.kind) {
+        case "A":
+            return;
+        case "D":
+            throw new Error();
+    }
+    m;  // { kind: "B" | "C", y: number }
+}
\ No newline at end of file

From 7bf40c49358edb44cfaaf79618455613158f7f4e Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 14 Jun 2016 09:39:30 -0700
Subject: [PATCH 288/332] Add more isDefinition tests and fix computed property
 bug

---
 src/services/services.ts                              |  2 +-
 .../getOccurrencesIsDefinitionOfBindingPattern.ts     |  8 ++++++++
 .../getOccurrencesIsDefinitionOfComputedProperty.ts   |  9 +++++++++
 .../fourslash/getOccurrencesIsDefinitionOfExport.ts   | 11 +++++++++++
 ...getOccurrencesIsDefinitionOfNumberNamedProperty.ts |  8 ++++++++
 ...getOccurrencesIsDefinitionOfStringNamedProperty.ts |  8 ++++++++
 6 files changed, 45 insertions(+), 1 deletion(-)
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfBindingPattern.ts
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfComputedProperty.ts
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfExport.ts
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfNumberNamedProperty.ts
 create mode 100644 tests/cases/fourslash/getOccurrencesIsDefinitionOfStringNamedProperty.ts

diff --git a/src/services/services.ts b/src/services/services.ts
index 4f5bdbdc469..3cf6b432c5d 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -6741,7 +6741,7 @@ namespace ts {
                 fileName: node.getSourceFile().fileName,
                 textSpan: createTextSpanFromBounds(start, end),
                 isWriteAccess: isWriteAccess(node),
-                isDefinition: isDeclarationName(node)
+                isDefinition: isDeclarationName(node) || node.parent.kind === SyntaxKind.ComputedPropertyName
             };
         }
 
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfBindingPattern.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfBindingPattern.ts
new file mode 100644
index 00000000000..9a30687c59e
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfBindingPattern.ts
@@ -0,0 +1,8 @@
+/// <reference path='fourslash.ts' />
+////const { [|{| "isDefinition": true |}x|], y } = { x: 1, y: 2 };
+////const z = [|{| "isDefinition": false |}x|];
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfComputedProperty.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfComputedProperty.ts
new file mode 100644
index 00000000000..8896694db50
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfComputedProperty.ts
@@ -0,0 +1,9 @@
+/// <reference path='fourslash.ts' />
+////let o = { ["[|{| "isDefinition": true |}foo|]"]: 12 };
+////let y = o.[|{| "isDefinition": false |}foo|];
+////let z = o['[|{| "isDefinition": false |}foo|]'];
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfExport.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfExport.ts
new file mode 100644
index 00000000000..f863af9184f
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfExport.ts
@@ -0,0 +1,11 @@
+/// <reference path='fourslash.ts' />
+// @Filename: m.ts
+////export var [|{| "isDefinition": true |}x|] = 12;
+// @Filename: main.ts
+////import { [|{| "isDefinition": true |}x|] } from "./m";
+////const y = [|{| "isDefinition": false |}x|];
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfNumberNamedProperty.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfNumberNamedProperty.ts
new file mode 100644
index 00000000000..7e3e084948f
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfNumberNamedProperty.ts
@@ -0,0 +1,8 @@
+/// <reference path='fourslash.ts' />
+////let o = { [|{| "isDefinition": true |}1|]: 12 };
+////let y = o[[|{| "isDefinition": false |}1|]];
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfStringNamedProperty.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfStringNamedProperty.ts
new file mode 100644
index 00000000000..291aec90dda
--- /dev/null
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfStringNamedProperty.ts
@@ -0,0 +1,8 @@
+/// <reference path='fourslash.ts' />
+////let o = { "[|{| "isDefinition": true |}x|]": 12 };
+////let y = o.[|{| "isDefinition": false |}x|];
+var firstRange = test.ranges()[0];
+goTo.position(firstRange.start, firstRange.fileName);
+test.ranges().forEach(range => {
+    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
+});

From 6b05ecab5bbdac72d1c94e32052c8053fa55fd7c Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Tue, 14 Jun 2016 09:39:48 -0700
Subject: [PATCH 289/332] Fix bug: do unescaping in the right place, so that it
 only affects escaped javascript identifiers

---
 src/services/services.ts                        | 4 ++--
 tests/cases/fourslash/codeCompletionEscaping.ts | 3 ++-
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/src/services/services.ts b/src/services/services.ts
index d5f63627471..70cc7e2e08d 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -3234,7 +3234,7 @@ namespace ts {
                 }
             }
 
-            return unescapeIdentifier(name);
+            return name;
         }
 
         function getCompletionData(fileName: string, position: number) {
@@ -4141,7 +4141,7 @@ namespace ts {
 
                     if (!uniqueNames[name]) {
                         uniqueNames[name] = name;
-                        const displayName = getCompletionEntryDisplayName(name, target, /*performCharacterChecks*/ true);
+                        const displayName = getCompletionEntryDisplayName(unescapeIdentifier(name), target, /*performCharacterChecks*/ true);
                         if (displayName) {
                             const entry = {
                                 name: displayName,
diff --git a/tests/cases/fourslash/codeCompletionEscaping.ts b/tests/cases/fourslash/codeCompletionEscaping.ts
index b8182307b7b..5061a87e5b6 100644
--- a/tests/cases/fourslash/codeCompletionEscaping.ts
+++ b/tests/cases/fourslash/codeCompletionEscaping.ts
@@ -2,7 +2,8 @@
 
 // @Filename: a.js
 // @allowJs: true
-////__foo;/**/
+////___foo; __foo;/**/
 
 goTo.marker();
 verify.completionListContains("__foo", undefined, undefined, "warning");
+verify.completionListContains("___foo", undefined, undefined, "warning");

From 102a890214f21ef56fa5325cf8eb859beef743ae Mon Sep 17 00:00:00 2001
From: Nathan Shively-Sanders <nathansa@microsoft.com>
Date: Tue, 14 Jun 2016 10:27:36 -0700
Subject: [PATCH 290/332] Use `isLiteralComputedPropertyDeclarationName`

---
 src/services/services.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/services/services.ts b/src/services/services.ts
index 3cf6b432c5d..07094df7d2b 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -6741,7 +6741,7 @@ namespace ts {
                 fileName: node.getSourceFile().fileName,
                 textSpan: createTextSpanFromBounds(start, end),
                 isWriteAccess: isWriteAccess(node),
-                isDefinition: isDeclarationName(node) || node.parent.kind === SyntaxKind.ComputedPropertyName
+                isDefinition: isDeclarationName(node) || isLiteralComputedPropertyDeclarationName(node)
             };
         }
 

From 5ea469a8a88c2becfc8b05d984f35efea5434cc9 Mon Sep 17 00:00:00 2001
From: Sheetal Nandi <shkamat@microsoft.com>
Date: Mon, 13 Jun 2016 17:05:44 -0700
Subject: [PATCH 291/332] No Need to store dot token when parsing property
 access expression

---
 src/compiler/emitter.ts                    | 15 ++++++++-------
 src/compiler/parser.ts                     |  4 +---
 src/compiler/types.ts                      |  1 -
 tests/cases/unittests/incrementalParser.ts |  2 +-
 4 files changed, 10 insertions(+), 12 deletions(-)

diff --git a/src/compiler/emitter.ts b/src/compiler/emitter.ts
index 481fe1b0c3e..101778e7322 100644
--- a/src/compiler/emitter.ts
+++ b/src/compiler/emitter.ts
@@ -2076,7 +2076,6 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
             function createPropertyAccessExpression(expression: Expression, name: Identifier): PropertyAccessExpression {
                 const result = <PropertyAccessExpression>createSynthesizedNode(SyntaxKind.PropertyAccessExpression);
                 result.expression = parenthesizeForAccess(expression);
-                result.dotToken = createSynthesizedNode(SyntaxKind.DotToken);
                 result.name = name;
                 return result;
             }
@@ -2223,11 +2222,11 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
             // Returns 'true' if the code was actually indented, false otherwise.
             // If the code is not indented, an optional valueToWriteWhenNotIndenting will be
             // emitted instead.
-            function indentIfOnDifferentLines(parent: Node, node1: Node, node2: Node, valueToWriteWhenNotIndenting?: string): boolean {
+            function indentIfOnDifferentLines(parent: Node, node1: TextRange, node2: TextRange, valueToWriteWhenNotIndenting?: string): boolean {
                 const realNodesAreOnDifferentLines = !nodeIsSynthesized(parent) && !nodeEndIsOnSameLineAsNodeStart(node1, node2);
 
                 // Always use a newline for synthesized code if the synthesizer desires it.
-                const synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2);
+                const synthesizedNodeIsOnDifferentLine = synthesizedNodeStartsOnNewLine(node2 as Node);
 
                 if (realNodesAreOnDifferentLines || synthesizedNodeIsOnDifferentLine) {
                     increaseIndent();
@@ -2257,7 +2256,10 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                 }
 
                 emit(node.expression);
-                const indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, node.dotToken);
+                const dotRangeStart = nodeIsSynthesized(node.expression) ? -1 : node.expression.end;
+                const dotRangeEnd = nodeIsSynthesized(node.expression) ? -1 : skipTrivia(currentText, node.expression.end) + 1;
+                const dotToken = <TextRange>{ pos: dotRangeStart, end: dotRangeEnd };
+                const indentedBeforeDot = indentIfOnDifferentLines(node, node.expression, dotToken);
 
                 // 1 .toString is a valid property access, emit a space after the literal
                 // Also emit a space if expression is a integer const enum value - it will appear in generated code as numeric literal
@@ -2283,7 +2285,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                     write(".");
                 }
 
-                const indentedAfterDot = indentIfOnDifferentLines(node, node.dotToken, node.name);
+                const indentedAfterDot = indentIfOnDifferentLines(node, dotToken, node.name);
                 emit(node.name);
                 decreaseIndentIf(indentedBeforeDot, indentedAfterDot);
             }
@@ -2780,7 +2782,6 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                         const identifier = emitTempVariableAssignment(leftHandSideExpression.expression, /*canDefineTempVariablesInPlace*/ false, /*shouldEmitCommaBeforeAssignment*/ false);
                         synthesizedLHS.expression = identifier;
 
-                        (<PropertyAccessExpression>synthesizedLHS).dotToken = leftHandSideExpression.dotToken;
                         (<PropertyAccessExpression>synthesizedLHS).name = leftHandSideExpression.name;
                         write(", ");
                     }
@@ -3758,7 +3759,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
                     getLineOfLocalPositionFromLineMap(currentLineMap, node2.end);
             }
 
-            function nodeEndIsOnSameLineAsNodeStart(node1: Node, node2: Node) {
+            function nodeEndIsOnSameLineAsNodeStart(node1: TextRange, node2: TextRange) {
                 return getLineOfLocalPositionFromLineMap(currentLineMap, node1.end) ===
                     getLineOfLocalPositionFromLineMap(currentLineMap, skipTrivia(currentText, node2.pos));
             }
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index a31cf0cbe93..b2f3755ec46 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -137,7 +137,6 @@ namespace ts {
                 return visitNodes(cbNodes, (<ObjectLiteralExpression>node).properties);
             case SyntaxKind.PropertyAccessExpression:
                 return visitNode(cbNode, (<PropertyAccessExpression>node).expression) ||
-                    visitNode(cbNode, (<PropertyAccessExpression>node).dotToken) ||
                     visitNode(cbNode, (<PropertyAccessExpression>node).name);
             case SyntaxKind.ElementAccessExpression:
                 return visitNode(cbNode, (<ElementAccessExpression>node).expression) ||
@@ -3571,7 +3570,7 @@ namespace ts {
             // If it wasn't then just try to parse out a '.' and report an error.
             const node = <PropertyAccessExpression>createNode(SyntaxKind.PropertyAccessExpression, expression.pos);
             node.expression = expression;
-            node.dotToken = parseExpectedToken(SyntaxKind.DotToken, /*reportAtCurrentPosition*/ false, Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
+            parseExpectedToken(SyntaxKind.DotToken, /*reportAtCurrentPosition*/ false, Diagnostics.super_must_be_followed_by_an_argument_list_or_member_access);
             node.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
             return finishNode(node);
         }
@@ -3807,7 +3806,6 @@ namespace ts {
                 if (dotToken) {
                     const propertyAccess = <PropertyAccessExpression>createNode(SyntaxKind.PropertyAccessExpression, expression.pos);
                     propertyAccess.expression = expression;
-                    propertyAccess.dotToken = dotToken;
                     propertyAccess.name = parseRightSideOfDot(/*allowIdentifierNames*/ true);
                     expression = finishNode(propertyAccess);
                     continue;
diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index db34bb7c6e8..b28223b7520 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -980,7 +980,6 @@ namespace ts {
     // @kind(SyntaxKind.PropertyAccessExpression)
     export interface PropertyAccessExpression extends MemberExpression, Declaration {
         expression: LeftHandSideExpression;
-        dotToken: Node;
         name: Identifier;
     }
 
diff --git a/tests/cases/unittests/incrementalParser.ts b/tests/cases/unittests/incrementalParser.ts
index 0988d51e11b..741c9e54cad 100644
--- a/tests/cases/unittests/incrementalParser.ts
+++ b/tests/cases/unittests/incrementalParser.ts
@@ -647,7 +647,7 @@ module m3 { }\
             const oldText = ScriptSnapshot.fromString(source);
             const newTextAndChange = withInsert(oldText, 0, "");
 
-            compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 8);
+            compareTrees(oldText, newTextAndChange.text, newTextAndChange.textChangeRange, 7);
         });
 
         it("Class to interface", () => {

From 5a90c6777aec2284e3ae65a7f335be69af210a5f Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Tue, 14 Jun 2016 11:33:41 -0700
Subject: [PATCH 292/332] Added tests.

---
 .../types/tuple/emptyTuples/emptyTuplesTypeAssertion01.ts     | 4 ++++
 .../types/tuple/emptyTuples/emptyTuplesTypeAssertion02.ts     | 4 ++++
 2 files changed, 8 insertions(+)
 create mode 100644 tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.ts
 create mode 100644 tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.ts

diff --git a/tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.ts b/tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.ts
new file mode 100644
index 00000000000..2e1e2d42499
--- /dev/null
+++ b/tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.ts
@@ -0,0 +1,4 @@
+// @declaration: true
+
+let x = <[]>[];
+let y = x[0];
\ No newline at end of file
diff --git a/tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.ts b/tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.ts
new file mode 100644
index 00000000000..43f63e9ce77
--- /dev/null
+++ b/tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.ts
@@ -0,0 +1,4 @@
+// @declaration: true
+
+let x = [] as [];
+let y = x[0];
\ No newline at end of file

From 0a1c4c60da9609155ba65dcfc5932ce748c3c3ba Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Tue, 14 Jun 2016 11:36:14 -0700
Subject: [PATCH 293/332] Accepted baselines.

---
 .../reference/emptyTuplesTypeAssertion01.js   | 27 +++++++++++++++++++
 .../emptyTuplesTypeAssertion01.symbols        |  9 +++++++
 .../emptyTuplesTypeAssertion01.types          | 13 +++++++++
 .../reference/emptyTuplesTypeAssertion02.js   | 27 +++++++++++++++++++
 .../emptyTuplesTypeAssertion02.symbols        |  9 +++++++
 .../emptyTuplesTypeAssertion02.types          | 13 +++++++++
 6 files changed, 98 insertions(+)
 create mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion01.js
 create mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion01.symbols
 create mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion01.types
 create mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion02.js
 create mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion02.symbols
 create mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion02.types

diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion01.js b/tests/baselines/reference/emptyTuplesTypeAssertion01.js
new file mode 100644
index 00000000000..b02caf3ceaf
--- /dev/null
+++ b/tests/baselines/reference/emptyTuplesTypeAssertion01.js
@@ -0,0 +1,27 @@
+//// [emptyTuplesTypeAssertion01.ts]
+
+let x = <[]>[];
+let y = x[0];
+
+//// [emptyTuplesTypeAssertion01.js]
+var x = [];
+var y = x[0];
+
+
+//// [emptyTuplesTypeAssertion01.d.ts]
+declare let x: [];
+declare let y: never;
+
+
+//// [DtsFileErrors]
+
+
+tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.d.ts(1,16): error TS1122: A tuple type element list cannot be empty.
+
+
+==== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.d.ts (1 errors) ====
+    declare let x: [];
+                   ~~
+!!! error TS1122: A tuple type element list cannot be empty.
+    declare let y: never;
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion01.symbols b/tests/baselines/reference/emptyTuplesTypeAssertion01.symbols
new file mode 100644
index 00000000000..d6f3cd4e9db
--- /dev/null
+++ b/tests/baselines/reference/emptyTuplesTypeAssertion01.symbols
@@ -0,0 +1,9 @@
+=== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.ts ===
+
+let x = <[]>[];
+>x : Symbol(x, Decl(emptyTuplesTypeAssertion01.ts, 1, 3))
+
+let y = x[0];
+>y : Symbol(y, Decl(emptyTuplesTypeAssertion01.ts, 2, 3))
+>x : Symbol(x, Decl(emptyTuplesTypeAssertion01.ts, 1, 3))
+
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion01.types b/tests/baselines/reference/emptyTuplesTypeAssertion01.types
new file mode 100644
index 00000000000..e0ef78c86e7
--- /dev/null
+++ b/tests/baselines/reference/emptyTuplesTypeAssertion01.types
@@ -0,0 +1,13 @@
+=== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.ts ===
+
+let x = <[]>[];
+>x : []
+><[]>[] : []
+>[] : undefined[]
+
+let y = x[0];
+>y : never
+>x[0] : never
+>x : []
+>0 : number
+
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion02.js b/tests/baselines/reference/emptyTuplesTypeAssertion02.js
new file mode 100644
index 00000000000..0a6c3e5a984
--- /dev/null
+++ b/tests/baselines/reference/emptyTuplesTypeAssertion02.js
@@ -0,0 +1,27 @@
+//// [emptyTuplesTypeAssertion02.ts]
+
+let x = [] as [];
+let y = x[0];
+
+//// [emptyTuplesTypeAssertion02.js]
+var x = [];
+var y = x[0];
+
+
+//// [emptyTuplesTypeAssertion02.d.ts]
+declare let x: [];
+declare let y: never;
+
+
+//// [DtsFileErrors]
+
+
+tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.d.ts(1,16): error TS1122: A tuple type element list cannot be empty.
+
+
+==== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.d.ts (1 errors) ====
+    declare let x: [];
+                   ~~
+!!! error TS1122: A tuple type element list cannot be empty.
+    declare let y: never;
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion02.symbols b/tests/baselines/reference/emptyTuplesTypeAssertion02.symbols
new file mode 100644
index 00000000000..a5eeec95a32
--- /dev/null
+++ b/tests/baselines/reference/emptyTuplesTypeAssertion02.symbols
@@ -0,0 +1,9 @@
+=== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.ts ===
+
+let x = [] as [];
+>x : Symbol(x, Decl(emptyTuplesTypeAssertion02.ts, 1, 3))
+
+let y = x[0];
+>y : Symbol(y, Decl(emptyTuplesTypeAssertion02.ts, 2, 3))
+>x : Symbol(x, Decl(emptyTuplesTypeAssertion02.ts, 1, 3))
+
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion02.types b/tests/baselines/reference/emptyTuplesTypeAssertion02.types
new file mode 100644
index 00000000000..2dc7e823516
--- /dev/null
+++ b/tests/baselines/reference/emptyTuplesTypeAssertion02.types
@@ -0,0 +1,13 @@
+=== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.ts ===
+
+let x = [] as [];
+>x : []
+>[] as [] : []
+>[] : undefined[]
+
+let y = x[0];
+>y : never
+>x[0] : never
+>x : []
+>0 : number
+

From c9bab058d549fc846b346c45c1df5ac87b707cef Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Tue, 14 Jun 2016 13:06:28 -0700
Subject: [PATCH 294/332] Check tuple types when getting the type node's type.

---
 src/compiler/checker.ts | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 47b0a53a8c3..51ef0a6058c 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -5027,6 +5027,7 @@ namespace ts {
         function getTypeFromTupleTypeNode(node: TupleTypeNode): Type {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
+                checkTupleType(node);
                 links.resolvedType = createTupleType(map(node.elementTypes, getTypeFromTypeNode));
             }
             return links.resolvedType;

From 82b385f33122eeebdd266d851ebd479020838847 Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Tue, 14 Jun 2016 15:15:42 -0700
Subject: [PATCH 295/332] Accepted baselines.

---
 .../emptyTuplesTypeAssertion01.errors.txt          |  9 +++++++++
 .../reference/emptyTuplesTypeAssertion01.js        | 14 --------------
 .../emptyTuplesTypeAssertion02.errors.txt          |  9 +++++++++
 .../reference/emptyTuplesTypeAssertion02.js        | 14 --------------
 4 files changed, 18 insertions(+), 28 deletions(-)
 create mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion01.errors.txt
 create mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion02.errors.txt

diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion01.errors.txt b/tests/baselines/reference/emptyTuplesTypeAssertion01.errors.txt
new file mode 100644
index 00000000000..4d70873bd74
--- /dev/null
+++ b/tests/baselines/reference/emptyTuplesTypeAssertion01.errors.txt
@@ -0,0 +1,9 @@
+tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.ts(2,10): error TS1122: A tuple type element list cannot be empty.
+
+
+==== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.ts (1 errors) ====
+    
+    let x = <[]>[];
+             ~~
+!!! error TS1122: A tuple type element list cannot be empty.
+    let y = x[0];
\ No newline at end of file
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion01.js b/tests/baselines/reference/emptyTuplesTypeAssertion01.js
index b02caf3ceaf..6ab1ec82bd5 100644
--- a/tests/baselines/reference/emptyTuplesTypeAssertion01.js
+++ b/tests/baselines/reference/emptyTuplesTypeAssertion01.js
@@ -11,17 +11,3 @@ var y = x[0];
 //// [emptyTuplesTypeAssertion01.d.ts]
 declare let x: [];
 declare let y: never;
-
-
-//// [DtsFileErrors]
-
-
-tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.d.ts(1,16): error TS1122: A tuple type element list cannot be empty.
-
-
-==== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.d.ts (1 errors) ====
-    declare let x: [];
-                   ~~
-!!! error TS1122: A tuple type element list cannot be empty.
-    declare let y: never;
-    
\ No newline at end of file
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion02.errors.txt b/tests/baselines/reference/emptyTuplesTypeAssertion02.errors.txt
new file mode 100644
index 00000000000..0cbc0d7371c
--- /dev/null
+++ b/tests/baselines/reference/emptyTuplesTypeAssertion02.errors.txt
@@ -0,0 +1,9 @@
+tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.ts(2,15): error TS1122: A tuple type element list cannot be empty.
+
+
+==== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.ts (1 errors) ====
+    
+    let x = [] as [];
+                  ~~
+!!! error TS1122: A tuple type element list cannot be empty.
+    let y = x[0];
\ No newline at end of file
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion02.js b/tests/baselines/reference/emptyTuplesTypeAssertion02.js
index 0a6c3e5a984..ad112732cd2 100644
--- a/tests/baselines/reference/emptyTuplesTypeAssertion02.js
+++ b/tests/baselines/reference/emptyTuplesTypeAssertion02.js
@@ -11,17 +11,3 @@ var y = x[0];
 //// [emptyTuplesTypeAssertion02.d.ts]
 declare let x: [];
 declare let y: never;
-
-
-//// [DtsFileErrors]
-
-
-tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.d.ts(1,16): error TS1122: A tuple type element list cannot be empty.
-
-
-==== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.d.ts (1 errors) ====
-    declare let x: [];
-                   ~~
-!!! error TS1122: A tuple type element list cannot be empty.
-    declare let y: never;
-    
\ No newline at end of file

From 784a76530cb6f1dfe99b1092514773c3947465d0 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Tue, 14 Jun 2016 17:44:57 -0700
Subject: [PATCH 296/332] Fix #9173: clear out lib and types before creating a
 program in transpileModule

---
 src/services/services.ts           |  4 ++++
 tests/cases/unittests/transpile.ts | 18 ++++++++++++++++++
 2 files changed, 22 insertions(+)

diff --git a/src/services/services.ts b/src/services/services.ts
index 8bf6a572ec7..c20f95a56f2 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -2001,6 +2001,10 @@ namespace ts {
         // so pass --noLib to avoid reporting a file not found error.
         options.noLib = true;
 
+        // Clear out the lib and types option as well
+        options.lib = undefined;
+        options.types = undefined;
+
         // We are not doing a full typecheck, we are not resolving the whole context,
         // so pass --noResolve to avoid reporting missing file errors.
         options.noResolve = true;
diff --git a/tests/cases/unittests/transpile.ts b/tests/cases/unittests/transpile.ts
index a4b1416ed29..cac44994420 100644
--- a/tests/cases/unittests/transpile.ts
+++ b/tests/cases/unittests/transpile.ts
@@ -304,6 +304,24 @@ var x = 0;`,
             test("var x", { expectedOutput: `"use strict";\r\nvar x;\r\n`, options: { fileName: "http://somewhere/directory//directory2/file.ts" } });
         });
 
+        it("Support options with lib values", () => {
+            const input = "const a = 10;";
+            const output = `"use strict";\r\nvar a = 10;\r\n`;
+            test(input, {
+                expectedOutput: output,
+                options: { compilerOptions: { lib: ["es6", "dom"], module: ModuleKind.CommonJS }, fileName: "input.js", reportDiagnostics: true }
+            });
+        });
+
+        it("Support options with types values", () => {
+            const input = "const a = 10;";
+            const output = `"use strict";\r\nvar a = 10;\r\n`;
+            test(input, {
+                expectedOutput: output,
+                options: { compilerOptions: { types: ["jquery", "typescript"], module: ModuleKind.CommonJS }, fileName: "input.js", reportDiagnostics: true }
+            });
+        });
+
         describe("String values for enums", () => {
             it("Accepts strings instead of enum values", () => {
                 test(`export const x = 0`, {

From 14c2bcf73ad5e5eead446beaf8955211b96a8957 Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Tue, 14 Jun 2016 19:02:47 -0700
Subject: [PATCH 297/332] Added tests.

---
 .../typeAssertions/duplicatePropertiesInTypeAssertions01.ts    | 3 +++
 .../typeAssertions/duplicatePropertiesInTypeAssertions02.ts    | 3 +++
 2 files changed, 6 insertions(+)
 create mode 100644 tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions01.ts
 create mode 100644 tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions02.ts

diff --git a/tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions01.ts b/tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions01.ts
new file mode 100644
index 00000000000..2f3da304c99
--- /dev/null
+++ b/tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions01.ts
@@ -0,0 +1,3 @@
+// @declaration: true
+
+let x = <{a: number; a: number}>{};
\ No newline at end of file
diff --git a/tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions02.ts b/tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions02.ts
new file mode 100644
index 00000000000..265fdbe5321
--- /dev/null
+++ b/tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions02.ts
@@ -0,0 +1,3 @@
+// @declaration: true
+
+let x = {} as {a: number; a: number};
\ No newline at end of file

From f786c5c1874f20ec793204342c86f3ebfa77b24c Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Tue, 14 Jun 2016 19:03:00 -0700
Subject: [PATCH 298/332] Accepted baselines.

---
 .../duplicatePropertiesInTypeAssertions01.js         | 12 ++++++++++++
 .../duplicatePropertiesInTypeAssertions01.symbols    |  7 +++++++
 .../duplicatePropertiesInTypeAssertions01.types      |  9 +++++++++
 .../duplicatePropertiesInTypeAssertions02.js         | 12 ++++++++++++
 .../duplicatePropertiesInTypeAssertions02.symbols    |  7 +++++++
 .../duplicatePropertiesInTypeAssertions02.types      |  9 +++++++++
 6 files changed, 56 insertions(+)
 create mode 100644 tests/baselines/reference/duplicatePropertiesInTypeAssertions01.js
 create mode 100644 tests/baselines/reference/duplicatePropertiesInTypeAssertions01.symbols
 create mode 100644 tests/baselines/reference/duplicatePropertiesInTypeAssertions01.types
 create mode 100644 tests/baselines/reference/duplicatePropertiesInTypeAssertions02.js
 create mode 100644 tests/baselines/reference/duplicatePropertiesInTypeAssertions02.symbols
 create mode 100644 tests/baselines/reference/duplicatePropertiesInTypeAssertions02.types

diff --git a/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.js b/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.js
new file mode 100644
index 00000000000..03f46ad110a
--- /dev/null
+++ b/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.js
@@ -0,0 +1,12 @@
+//// [duplicatePropertiesInTypeAssertions01.ts]
+
+let x = <{a: number; a: number}>{};
+
+//// [duplicatePropertiesInTypeAssertions01.js]
+var x = {};
+
+
+//// [duplicatePropertiesInTypeAssertions01.d.ts]
+declare let x: {
+    a: number;
+};
diff --git a/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.symbols b/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.symbols
new file mode 100644
index 00000000000..e6320bc3f8e
--- /dev/null
+++ b/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.symbols
@@ -0,0 +1,7 @@
+=== tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions01.ts ===
+
+let x = <{a: number; a: number}>{};
+>x : Symbol(x, Decl(duplicatePropertiesInTypeAssertions01.ts, 1, 3))
+>a : Symbol(a, Decl(duplicatePropertiesInTypeAssertions01.ts, 1, 10), Decl(duplicatePropertiesInTypeAssertions01.ts, 1, 20))
+>a : Symbol(a, Decl(duplicatePropertiesInTypeAssertions01.ts, 1, 10), Decl(duplicatePropertiesInTypeAssertions01.ts, 1, 20))
+
diff --git a/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.types b/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.types
new file mode 100644
index 00000000000..ac185f8e265
--- /dev/null
+++ b/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.types
@@ -0,0 +1,9 @@
+=== tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions01.ts ===
+
+let x = <{a: number; a: number}>{};
+>x : { a: number; }
+><{a: number; a: number}>{} : { a: number; }
+>a : number
+>a : number
+>{} : {}
+
diff --git a/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.js b/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.js
new file mode 100644
index 00000000000..8aa4449595a
--- /dev/null
+++ b/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.js
@@ -0,0 +1,12 @@
+//// [duplicatePropertiesInTypeAssertions02.ts]
+
+let x = {} as {a: number; a: number};
+
+//// [duplicatePropertiesInTypeAssertions02.js]
+var x = {};
+
+
+//// [duplicatePropertiesInTypeAssertions02.d.ts]
+declare let x: {
+    a: number;
+};
diff --git a/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.symbols b/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.symbols
new file mode 100644
index 00000000000..152307cc669
--- /dev/null
+++ b/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.symbols
@@ -0,0 +1,7 @@
+=== tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions02.ts ===
+
+let x = {} as {a: number; a: number};
+>x : Symbol(x, Decl(duplicatePropertiesInTypeAssertions02.ts, 1, 3))
+>a : Symbol(a, Decl(duplicatePropertiesInTypeAssertions02.ts, 1, 15), Decl(duplicatePropertiesInTypeAssertions02.ts, 1, 25))
+>a : Symbol(a, Decl(duplicatePropertiesInTypeAssertions02.ts, 1, 15), Decl(duplicatePropertiesInTypeAssertions02.ts, 1, 25))
+
diff --git a/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.types b/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.types
new file mode 100644
index 00000000000..3e3f8cd7e59
--- /dev/null
+++ b/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.types
@@ -0,0 +1,9 @@
+=== tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions02.ts ===
+
+let x = {} as {a: number; a: number};
+>x : { a: number; }
+>{} as {a: number; a: number} : { a: number; }
+>{} : {}
+>a : number
+>a : number
+

From 52a96ac8192385fe49749a6bab7812de6fcc6ece Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Tue, 14 Jun 2016 19:13:32 -0700
Subject: [PATCH 299/332] Always check type assertion types.

---
 src/compiler/checker.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 51ef0a6058c..e343762ade0 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -5027,7 +5027,6 @@ namespace ts {
         function getTypeFromTupleTypeNode(node: TupleTypeNode): Type {
             const links = getNodeLinks(node);
             if (!links.resolvedType) {
-                checkTupleType(node);
                 links.resolvedType = createTupleType(map(node.elementTypes, getTypeFromTypeNode));
             }
             return links.resolvedType;
@@ -11521,7 +11520,10 @@ namespace ts {
 
         function checkAssertion(node: AssertionExpression) {
             const exprType = getRegularTypeOfObjectLiteral(checkExpression(node.expression));
+
+            checkSourceElement(node.type);
             const targetType = getTypeFromTypeNode(node.type);
+
             if (produceDiagnostics && targetType !== unknownType) {
                 const widenedType = getWidenedType(exprType);
                 if (!isTypeComparableTo(targetType, widenedType)) {

From da3333e967a39aba6fffc7325f0a790f3ada1af1 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Tue, 14 Jun 2016 19:23:04 -0700
Subject: [PATCH 300/332] Clear out unused compiler options when transpiling

---
 src/services/services.ts           |  10 +-
 tests/cases/unittests/transpile.ts | 225 +++++++++++++++++++++++++++--
 2 files changed, 220 insertions(+), 15 deletions(-)

diff --git a/src/services/services.ts b/src/services/services.ts
index c20f95a56f2..19167a5f6e0 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -2001,9 +2001,17 @@ namespace ts {
         // so pass --noLib to avoid reporting a file not found error.
         options.noLib = true;
 
-        // Clear out the lib and types option as well
+        // Clear out other settings that would not be participate in transpiling this module
         options.lib = undefined;
         options.types = undefined;
+        options.noEmit = undefined;
+        options.noEmitOnError = undefined;
+        options.paths = undefined;
+        options.rootDirs = undefined;
+        options.declaration = undefined;
+        options.declarationDir = undefined;
+        options.out = undefined;
+        options.outFile = undefined;
 
         // We are not doing a full typecheck, we are not resolving the whole context,
         // so pass --noResolve to avoid reporting missing file errors.
diff --git a/tests/cases/unittests/transpile.ts b/tests/cases/unittests/transpile.ts
index cac44994420..c8025bfc0a2 100644
--- a/tests/cases/unittests/transpile.ts
+++ b/tests/cases/unittests/transpile.ts
@@ -1,5 +1,9 @@
 /// <reference path="..\..\..\src\harness\harness.ts" />
 
+interface ObjectConstructor {
+    assign<T, U>(target: T, source: U): T & U;
+}
+
 namespace ts {
     describe("Transpile", () => {
 
@@ -21,6 +25,9 @@ namespace ts {
                     assert.equal(expectedDiagnosticTexts[i], diagnostics[i] && diagnostics[i].messageText);
                 }
             };
+            if (diagnostics.length !== n && diagnostics.length) {
+                console.log(JSON.stringify(diagnostics, undefined, 2));
+            }
             assert.equal(diagnostics.length, n, "Resuting diagnostics count does not match expected");
         }
 
@@ -89,6 +96,19 @@ namespace ts {
 
         }
 
+        function testCompilerOption(options: CompilerOptions, input?: string, output?: string): void {
+            input = input || "x = 0;";
+            output = output || `"use strict";\r\nx = 0;\r\n`;
+            test(input, {
+                expectedOutput: output,
+                options: {
+                    compilerOptions: Object.assign({ module: ModuleKind.CommonJS, newLine: NewLineKind.CarriageReturnLineFeed }, options),
+                    fileName: "input.js",
+                    reportDiagnostics: true
+                }
+            });
+        }
+
         it("Generates no diagnostics with valid inputs", () => {
             // No errors
             test(`var x = 0;`, { options: { compilerOptions: { module: ModuleKind.CommonJS } } });
@@ -304,21 +324,198 @@ var x = 0;`,
             test("var x", { expectedOutput: `"use strict";\r\nvar x;\r\n`, options: { fileName: "http://somewhere/directory//directory2/file.ts" } });
         });
 
-        it("Support options with lib values", () => {
-            const input = "const a = 10;";
-            const output = `"use strict";\r\nvar a = 10;\r\n`;
-            test(input, {
-                expectedOutput: output,
-                options: { compilerOptions: { lib: ["es6", "dom"], module: ModuleKind.CommonJS }, fileName: "input.js", reportDiagnostics: true }
-            });
-        });
+        describe("Works with all compiler options", () => {
 
-        it("Support options with types values", () => {
-            const input = "const a = 10;";
-            const output = `"use strict";\r\nvar a = 10;\r\n`;
-            test(input, {
-                expectedOutput: output,
-                options: { compilerOptions: { types: ["jquery", "typescript"], module: ModuleKind.CommonJS }, fileName: "input.js", reportDiagnostics: true }
+            it("Supports setting 'allowJs'", () => {
+                testCompilerOption({ allowJs: true });
+            });
+
+            it("Supports setting 'allowSyntheticDefaultImports'", () => {
+                testCompilerOption({ allowSyntheticDefaultImports: true });
+            });
+
+            it("Supports setting 'allowUnreachableCode'", () => {
+                testCompilerOption({ allowUnreachableCode: true });
+            });
+
+            it("Supports setting 'allowUnusedLabels'", () => {
+                testCompilerOption({ allowUnusedLabels: true });
+            });
+
+            it("Supports setting 'baseUrl'", () => {
+                testCompilerOption({ baseUrl: "./folder/baseUrl" });
+            });
+
+            it("Supports setting 'charset'", () => {
+                testCompilerOption({ charset: "en-us" });
+            });
+
+            it("Supports setting 'declaration'", () => {
+                testCompilerOption({ declaration: true });
+            });
+
+            it("Supports setting 'declarationDir'", () => {
+                testCompilerOption({ declarationDir: "out/declarations" });
+            });
+
+            it("Supports setting 'emitBOM'", () => {
+                testCompilerOption({ emitBOM: true });
+            });
+
+            it("Supports setting 'emitDecoratorMetadata'", () => {
+                testCompilerOption({ emitDecoratorMetadata: true, experimentalDecorators: true });
+            });
+
+            it("Supports setting 'experimentalDecorators'", () => {
+                testCompilerOption({ experimentalDecorators: true });
+            });
+
+            it("Supports setting 'forceConsistentCasingInFileNames'", () => {
+                testCompilerOption({ forceConsistentCasingInFileNames: true });
+            });
+
+            it("Supports setting 'isolatedModules'", () => {
+                testCompilerOption({ isolatedModules: true });
+            });
+
+            it("Supports setting 'jsx'", () => {
+                testCompilerOption({ jsx: 1 });
+            });
+
+            it("Supports setting 'lib'", () => {
+                testCompilerOption({ lib: ["es2015", "dom"] });
+            });
+
+            it("Supports setting 'locale'", () => {
+                testCompilerOption({ locale: "en-us" });
+            });
+
+            it("Supports setting 'module'", () => {
+                testCompilerOption({ module: 1 });
+            });
+
+            it("Supports setting 'moduleResolution'", () => {
+                testCompilerOption({ moduleResolution: 2 });
+            });
+
+            it("Supports setting 'newLine'", () => {
+                testCompilerOption({ newLine: 0 });
+            });
+
+            it("Supports setting 'noEmit'", () => {
+                testCompilerOption({ noEmit: true });
+            });
+
+            it("Supports setting 'noEmitHelpers'", () => {
+                testCompilerOption({ noEmitHelpers: true });
+            });
+
+            it("Supports setting 'noEmitOnError'", () => {
+                testCompilerOption({ noEmitOnError: true });
+            });
+
+            it("Supports setting 'noErrorTruncation'", () => {
+                testCompilerOption({ noErrorTruncation: true });
+            });
+
+            it("Supports setting 'noFallthroughCasesInSwitch'", () => {
+                testCompilerOption({ noFallthroughCasesInSwitch: true });
+            });
+
+            it("Supports setting 'noImplicitAny'", () => {
+                testCompilerOption({ noImplicitAny: true });
+            });
+
+            it("Supports setting 'noImplicitReturns'", () => {
+                testCompilerOption({ noImplicitReturns: true });
+            });
+
+            it("Supports setting 'noImplicitThis'", () => {
+                testCompilerOption({ noImplicitThis: true });
+            });
+
+            it("Supports setting 'noImplicitUseStrict'", () => {
+                testCompilerOption({ noImplicitUseStrict: true }, "x;", "x;\r\n");
+            });
+
+            it("Supports setting 'noLib'", () => {
+                testCompilerOption({ noLib: true });
+            });
+
+            it("Supports setting 'noResolve'", () => {
+                testCompilerOption({ noResolve: true });
+            });
+
+            it("Supports setting 'out'", () => {
+                testCompilerOption({ out: "./out" });
+            });
+
+            it("Supports setting 'outDir'", () => {
+                testCompilerOption({ outDir: "./outDir" });
+            });
+
+            it("Supports setting 'outFile'", () => {
+                testCompilerOption({ outFile: "./outFile" });
+            });
+
+            it("Supports setting 'paths'", () => {
+                testCompilerOption({ paths: { "*": ["./generated*"] } });
+            });
+
+            it("Supports setting 'preserveConstEnums'", () => {
+                testCompilerOption({ preserveConstEnums: true });
+            });
+
+            it("Supports setting 'reactNamespace'", () => {
+                testCompilerOption({ reactNamespace: "react" });
+            });
+
+            it("Supports setting 'removeComments'", () => {
+                testCompilerOption({ removeComments: true });
+            });
+
+            it("Supports setting 'rootDir'", () => {
+                testCompilerOption({ rootDir: "./rootDir" });
+            });
+
+            it("Supports setting 'rootDirs'", () => {
+                testCompilerOption({ rootDirs: ["./a", "./b"] });
+            });
+
+            it("Supports setting 'skipLibCheck'", () => {
+                testCompilerOption({ skipLibCheck: true });
+            });
+
+            it("Supports setting 'skipDefaultLibCheck'", () => {
+                testCompilerOption({ skipDefaultLibCheck: true });
+            });
+
+            it("Supports setting 'strictNullChecks'", () => {
+                testCompilerOption({ strictNullChecks: true });
+            });
+
+            it("Supports setting 'stripInternal'", () => {
+                testCompilerOption({ stripInternal: true });
+            });
+
+            it("Supports setting 'suppressExcessPropertyErrors'", () => {
+                testCompilerOption({ suppressExcessPropertyErrors: true });
+            });
+
+            it("Supports setting 'suppressImplicitAnyIndexErrors'", () => {
+                testCompilerOption({ suppressImplicitAnyIndexErrors: true });
+            });
+
+            it("Supports setting 'target'", () => {
+                testCompilerOption({ target: 2 });
+            });
+
+            it("Supports setting 'types'", () => {
+                testCompilerOption({ types: ["jquery", "jasmine"] });
+            });
+
+            it("Supports setting 'typeRoots'", () => {
+                testCompilerOption({ typeRoots: ["./folder"] });
             });
         });
 

From 74a784c8bef3a91864fcfe1c3203b5bdce0ef80c Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Tue, 14 Jun 2016 22:38:35 -0700
Subject: [PATCH 301/332] Accepted baselines.

---
 .../defaultValueInFunctionTypes.errors.txt          |  7 +++++--
 ...duplicatePropertiesInTypeAssertions01.errors.txt | 11 +++++++++++
 .../duplicatePropertiesInTypeAssertions01.symbols   |  7 -------
 .../duplicatePropertiesInTypeAssertions01.types     |  9 ---------
 ...duplicatePropertiesInTypeAssertions02.errors.txt | 11 +++++++++++
 .../duplicatePropertiesInTypeAssertions02.symbols   |  7 -------
 .../duplicatePropertiesInTypeAssertions02.types     |  9 ---------
 .../reference/emptyTuplesTypeAssertion01.symbols    |  9 ---------
 .../reference/emptyTuplesTypeAssertion01.types      | 13 -------------
 .../reference/emptyTuplesTypeAssertion02.symbols    |  9 ---------
 .../reference/emptyTuplesTypeAssertion02.types      | 13 -------------
 11 files changed, 27 insertions(+), 78 deletions(-)
 create mode 100644 tests/baselines/reference/duplicatePropertiesInTypeAssertions01.errors.txt
 delete mode 100644 tests/baselines/reference/duplicatePropertiesInTypeAssertions01.symbols
 delete mode 100644 tests/baselines/reference/duplicatePropertiesInTypeAssertions01.types
 create mode 100644 tests/baselines/reference/duplicatePropertiesInTypeAssertions02.errors.txt
 delete mode 100644 tests/baselines/reference/duplicatePropertiesInTypeAssertions02.symbols
 delete mode 100644 tests/baselines/reference/duplicatePropertiesInTypeAssertions02.types
 delete mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion01.symbols
 delete mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion01.types
 delete mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion02.symbols
 delete mode 100644 tests/baselines/reference/emptyTuplesTypeAssertion02.types

diff --git a/tests/baselines/reference/defaultValueInFunctionTypes.errors.txt b/tests/baselines/reference/defaultValueInFunctionTypes.errors.txt
index 01a807b3e7d..5544b9caae0 100644
--- a/tests/baselines/reference/defaultValueInFunctionTypes.errors.txt
+++ b/tests/baselines/reference/defaultValueInFunctionTypes.errors.txt
@@ -1,8 +1,11 @@
 tests/cases/compiler/defaultValueInFunctionTypes.ts(1,9): error TS2371: A parameter initializer is only allowed in a function or constructor implementation.
+tests/cases/compiler/defaultValueInFunctionTypes.ts(2,11): error TS2371: A parameter initializer is only allowed in a function or constructor implementation.
 
 
-==== tests/cases/compiler/defaultValueInFunctionTypes.ts (1 errors) ====
+==== tests/cases/compiler/defaultValueInFunctionTypes.ts (2 errors) ====
     var x: (a: number = 1) => number;
             ~~~~~~~~~~~~~
 !!! error TS2371: A parameter initializer is only allowed in a function or constructor implementation.
-    var y = <(a : string = "") => any>(undefined)
\ No newline at end of file
+    var y = <(a : string = "") => any>(undefined)
+              ~~~~~~~~~~~~~~~
+!!! error TS2371: A parameter initializer is only allowed in a function or constructor implementation.
\ No newline at end of file
diff --git a/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.errors.txt b/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.errors.txt
new file mode 100644
index 00000000000..80b108bbd66
--- /dev/null
+++ b/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.errors.txt
@@ -0,0 +1,11 @@
+tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions01.ts(2,11): error TS2300: Duplicate identifier 'a'.
+tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions01.ts(2,22): error TS2300: Duplicate identifier 'a'.
+
+
+==== tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions01.ts (2 errors) ====
+    
+    let x = <{a: number; a: number}>{};
+              ~
+!!! error TS2300: Duplicate identifier 'a'.
+                         ~
+!!! error TS2300: Duplicate identifier 'a'.
\ No newline at end of file
diff --git a/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.symbols b/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.symbols
deleted file mode 100644
index e6320bc3f8e..00000000000
--- a/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.symbols
+++ /dev/null
@@ -1,7 +0,0 @@
-=== tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions01.ts ===
-
-let x = <{a: number; a: number}>{};
->x : Symbol(x, Decl(duplicatePropertiesInTypeAssertions01.ts, 1, 3))
->a : Symbol(a, Decl(duplicatePropertiesInTypeAssertions01.ts, 1, 10), Decl(duplicatePropertiesInTypeAssertions01.ts, 1, 20))
->a : Symbol(a, Decl(duplicatePropertiesInTypeAssertions01.ts, 1, 10), Decl(duplicatePropertiesInTypeAssertions01.ts, 1, 20))
-
diff --git a/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.types b/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.types
deleted file mode 100644
index ac185f8e265..00000000000
--- a/tests/baselines/reference/duplicatePropertiesInTypeAssertions01.types
+++ /dev/null
@@ -1,9 +0,0 @@
-=== tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions01.ts ===
-
-let x = <{a: number; a: number}>{};
->x : { a: number; }
-><{a: number; a: number}>{} : { a: number; }
->a : number
->a : number
->{} : {}
-
diff --git a/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.errors.txt b/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.errors.txt
new file mode 100644
index 00000000000..eeb9ffa9302
--- /dev/null
+++ b/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.errors.txt
@@ -0,0 +1,11 @@
+tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions02.ts(2,16): error TS2300: Duplicate identifier 'a'.
+tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions02.ts(2,27): error TS2300: Duplicate identifier 'a'.
+
+
+==== tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions02.ts (2 errors) ====
+    
+    let x = {} as {a: number; a: number};
+                   ~
+!!! error TS2300: Duplicate identifier 'a'.
+                              ~
+!!! error TS2300: Duplicate identifier 'a'.
\ No newline at end of file
diff --git a/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.symbols b/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.symbols
deleted file mode 100644
index 152307cc669..00000000000
--- a/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.symbols
+++ /dev/null
@@ -1,7 +0,0 @@
-=== tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions02.ts ===
-
-let x = {} as {a: number; a: number};
->x : Symbol(x, Decl(duplicatePropertiesInTypeAssertions02.ts, 1, 3))
->a : Symbol(a, Decl(duplicatePropertiesInTypeAssertions02.ts, 1, 15), Decl(duplicatePropertiesInTypeAssertions02.ts, 1, 25))
->a : Symbol(a, Decl(duplicatePropertiesInTypeAssertions02.ts, 1, 15), Decl(duplicatePropertiesInTypeAssertions02.ts, 1, 25))
-
diff --git a/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.types b/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.types
deleted file mode 100644
index 3e3f8cd7e59..00000000000
--- a/tests/baselines/reference/duplicatePropertiesInTypeAssertions02.types
+++ /dev/null
@@ -1,9 +0,0 @@
-=== tests/cases/conformance/expressions/typeAssertions/duplicatePropertiesInTypeAssertions02.ts ===
-
-let x = {} as {a: number; a: number};
->x : { a: number; }
->{} as {a: number; a: number} : { a: number; }
->{} : {}
->a : number
->a : number
-
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion01.symbols b/tests/baselines/reference/emptyTuplesTypeAssertion01.symbols
deleted file mode 100644
index d6f3cd4e9db..00000000000
--- a/tests/baselines/reference/emptyTuplesTypeAssertion01.symbols
+++ /dev/null
@@ -1,9 +0,0 @@
-=== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.ts ===
-
-let x = <[]>[];
->x : Symbol(x, Decl(emptyTuplesTypeAssertion01.ts, 1, 3))
-
-let y = x[0];
->y : Symbol(y, Decl(emptyTuplesTypeAssertion01.ts, 2, 3))
->x : Symbol(x, Decl(emptyTuplesTypeAssertion01.ts, 1, 3))
-
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion01.types b/tests/baselines/reference/emptyTuplesTypeAssertion01.types
deleted file mode 100644
index e0ef78c86e7..00000000000
--- a/tests/baselines/reference/emptyTuplesTypeAssertion01.types
+++ /dev/null
@@ -1,13 +0,0 @@
-=== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion01.ts ===
-
-let x = <[]>[];
->x : []
-><[]>[] : []
->[] : undefined[]
-
-let y = x[0];
->y : never
->x[0] : never
->x : []
->0 : number
-
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion02.symbols b/tests/baselines/reference/emptyTuplesTypeAssertion02.symbols
deleted file mode 100644
index a5eeec95a32..00000000000
--- a/tests/baselines/reference/emptyTuplesTypeAssertion02.symbols
+++ /dev/null
@@ -1,9 +0,0 @@
-=== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.ts ===
-
-let x = [] as [];
->x : Symbol(x, Decl(emptyTuplesTypeAssertion02.ts, 1, 3))
-
-let y = x[0];
->y : Symbol(y, Decl(emptyTuplesTypeAssertion02.ts, 2, 3))
->x : Symbol(x, Decl(emptyTuplesTypeAssertion02.ts, 1, 3))
-
diff --git a/tests/baselines/reference/emptyTuplesTypeAssertion02.types b/tests/baselines/reference/emptyTuplesTypeAssertion02.types
deleted file mode 100644
index 2dc7e823516..00000000000
--- a/tests/baselines/reference/emptyTuplesTypeAssertion02.types
+++ /dev/null
@@ -1,13 +0,0 @@
-=== tests/cases/conformance/types/tuple/emptyTuples/emptyTuplesTypeAssertion02.ts ===
-
-let x = [] as [];
->x : []
->[] as [] : []
->[] : undefined[]
-
-let y = x[0];
->y : never
->x[0] : never
->x : []
->0 : number
-

From 386fa3e1f6de1193539ed483362ece1375562292 Mon Sep 17 00:00:00 2001
From: Herrington Darkholme <nonamesheep1@gmail.com>
Date: Wed, 15 Jun 2016 20:54:56 +0800
Subject: [PATCH 302/332] improve error message for extending interface

---
 src/compiler/checker.ts              | 22 +++++++++++++++++++++-
 src/compiler/diagnosticMessages.json |  4 ++++
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index a2fe0065983..d5f89bee8bf 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -852,7 +852,8 @@ namespace ts {
 
             if (!result) {
                 if (nameNotFoundMessage) {
-                    if (!checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg)) {
+                    if (!checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) &&
+                       !checkAndReportErrorForExtendingInterface(errorLocation, name)) {
                         error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : declarationNameToString(nameArg));
                     }
                 }
@@ -936,6 +937,25 @@ namespace ts {
             return false;
         }
 
+
+        function checkAndReportErrorForExtendingInterface(errorLocation: Node, name: string): boolean {
+            if (!errorLocation || errorLocation.kind !== SyntaxKind.Identifier ||
+                !errorLocation.parent || !errorLocation.parent.parent ||
+                errorLocation.parent.parent.kind !== SyntaxKind.HeritageClause) {
+                return false;
+            }
+            const heritageClause = <HeritageClause>errorLocation.parent.parent;
+            if (heritageClause.token !== SyntaxKind.ExtendsKeyword) {
+                return false;
+            }
+            const enclosingScope = heritageClause.parent.parent.locals;
+            if (enclosingScope && getSymbol(enclosingScope, name, SymbolFlags.Interface)) {
+                error(errorLocation, Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements, name);
+                return true;
+            }
+            return false;
+         }
+
         function checkResolvedBlockScopedVariable(result: Symbol, errorLocation: Node): void {
             Debug.assert((result.flags & SymbolFlags.BlockScopedVariable) !== 0);
             // Block-scoped variables cannot be used before their definition
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index b78c342481f..30a4e1575e5 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -1935,6 +1935,10 @@
         "category": "Error",
         "code": 2688
     },
+    "Cannot extend an interface '{0}'. Did you mean 'implements'?": {
+        "category": "Error",
+        "code": 2689
+    },
     "Import declaration '{0}' is using private name '{1}'.": {
         "category": "Error",
         "code": 4000

From 85434c59fcaad4919ad4e1545a9842495324c145 Mon Sep 17 00:00:00 2001
From: Herrington Darkholme <nonamesheep1@gmail.com>
Date: Wed, 15 Jun 2016 20:55:50 +0800
Subject: [PATCH 303/332] accept baselines

---
 .../reference/classExtendingClassLikeType.errors.txt      | 4 ++--
 .../reference/classExtendsEveryObjectType.errors.txt      | 4 ++--
 .../baselines/reference/classExtendsInterface.errors.txt  | 8 ++++----
 .../genericTypeReferenceWithoutTypeArgument2.errors.txt   | 4 ++--
 4 files changed, 10 insertions(+), 10 deletions(-)

diff --git a/tests/baselines/reference/classExtendingClassLikeType.errors.txt b/tests/baselines/reference/classExtendingClassLikeType.errors.txt
index 6f9aef927ea..5edefd78ec5 100644
--- a/tests/baselines/reference/classExtendingClassLikeType.errors.txt
+++ b/tests/baselines/reference/classExtendingClassLikeType.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/classes/classDeclarations/classExtendingClassLikeType.ts(7,18): error TS2304: Cannot find name 'Base'.
+tests/cases/conformance/classes/classDeclarations/classExtendingClassLikeType.ts(7,18): error TS2689: Cannot extend an interface 'Base'. Did you mean 'implements'?
 tests/cases/conformance/classes/classDeclarations/classExtendingClassLikeType.ts(45,18): error TS2508: No base constructor has the specified number of type arguments.
 tests/cases/conformance/classes/classDeclarations/classExtendingClassLikeType.ts(56,18): error TS2510: Base constructors must all have the same return type.
 
@@ -12,7 +12,7 @@ tests/cases/conformance/classes/classDeclarations/classExtendingClassLikeType.ts
     // Error, no Base constructor function
     class D0 extends Base<string, string> {
                      ~~~~
-!!! error TS2304: Cannot find name 'Base'.
+!!! error TS2689: Cannot extend an interface 'Base'. Did you mean 'implements'?
     }
     
     interface BaseConstructor {
diff --git a/tests/baselines/reference/classExtendsEveryObjectType.errors.txt b/tests/baselines/reference/classExtendsEveryObjectType.errors.txt
index 0339dfad13a..e1c5137e3a9 100644
--- a/tests/baselines/reference/classExtendsEveryObjectType.errors.txt
+++ b/tests/baselines/reference/classExtendsEveryObjectType.errors.txt
@@ -1,4 +1,4 @@
-tests/cases/conformance/classes/classDeclarations/classHeritageSpecification/classExtendsEveryObjectType.ts(4,17): error TS2304: Cannot find name 'I'.
+tests/cases/conformance/classes/classDeclarations/classHeritageSpecification/classExtendsEveryObjectType.ts(4,17): error TS2689: Cannot extend an interface 'I'. Did you mean 'implements'?
 tests/cases/conformance/classes/classDeclarations/classHeritageSpecification/classExtendsEveryObjectType.ts(6,18): error TS2507: Type '{ foo: any; }' is not a constructor function type.
 tests/cases/conformance/classes/classDeclarations/classHeritageSpecification/classExtendsEveryObjectType.ts(6,25): error TS2304: Cannot find name 'string'.
 tests/cases/conformance/classes/classDeclarations/classHeritageSpecification/classExtendsEveryObjectType.ts(6,31): error TS1005: ',' expected.
@@ -14,7 +14,7 @@ tests/cases/conformance/classes/classDeclarations/classHeritageSpecification/cla
     }
     class C extends I { } // error
                     ~
-!!! error TS2304: Cannot find name 'I'.
+!!! error TS2689: Cannot extend an interface 'I'. Did you mean 'implements'?
     
     class C2 extends { foo: string; } { } // error
                      ~~~~~~~~~~~~~~~~
diff --git a/tests/baselines/reference/classExtendsInterface.errors.txt b/tests/baselines/reference/classExtendsInterface.errors.txt
index 2ecca6cf2cf..3714bbb2323 100644
--- a/tests/baselines/reference/classExtendsInterface.errors.txt
+++ b/tests/baselines/reference/classExtendsInterface.errors.txt
@@ -1,17 +1,17 @@
-tests/cases/compiler/classExtendsInterface.ts(2,17): error TS2304: Cannot find name 'Comparable'.
-tests/cases/compiler/classExtendsInterface.ts(6,21): error TS2304: Cannot find name 'Comparable2'.
+tests/cases/compiler/classExtendsInterface.ts(2,17): error TS2689: Cannot extend an interface 'Comparable'. Did you mean 'implements'?
+tests/cases/compiler/classExtendsInterface.ts(6,21): error TS2689: Cannot extend an interface 'Comparable2'. Did you mean 'implements'?
 
 
 ==== tests/cases/compiler/classExtendsInterface.ts (2 errors) ====
     interface Comparable {}
     class A extends Comparable {}
                     ~~~~~~~~~~
-!!! error TS2304: Cannot find name 'Comparable'.
+!!! error TS2689: Cannot extend an interface 'Comparable'. Did you mean 'implements'?
     class B implements Comparable {}
      
     interface Comparable2<T> {}
     class A2<T> extends Comparable2<T> {}
                         ~~~~~~~~~~~
-!!! error TS2304: Cannot find name 'Comparable2'.
+!!! error TS2689: Cannot extend an interface 'Comparable2'. Did you mean 'implements'?
     class B2<T> implements Comparable2<T> {}
     
\ No newline at end of file
diff --git a/tests/baselines/reference/genericTypeReferenceWithoutTypeArgument2.errors.txt b/tests/baselines/reference/genericTypeReferenceWithoutTypeArgument2.errors.txt
index e590ad42a7d..b6767a3b938 100644
--- a/tests/baselines/reference/genericTypeReferenceWithoutTypeArgument2.errors.txt
+++ b/tests/baselines/reference/genericTypeReferenceWithoutTypeArgument2.errors.txt
@@ -13,7 +13,7 @@ tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenc
 tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(18,23): error TS2314: Generic type 'I<T>' requires 1 type argument(s).
 tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(18,27): error TS2314: Generic type 'I<T>' requires 1 type argument(s).
 tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(18,38): error TS2314: Generic type 'I<T>' requires 1 type argument(s).
-tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(20,17): error TS2304: Cannot find name 'I'.
+tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(20,17): error TS2689: Cannot extend an interface 'I'. Did you mean 'implements'?
 tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(23,21): error TS2314: Generic type 'I<T>' requires 1 type argument(s).
 tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(29,18): error TS2304: Cannot find name 'M'.
 tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenceWithoutTypeArgument2.ts(30,24): error TS2314: Generic type 'E<T>' requires 1 type argument(s).
@@ -76,7 +76,7 @@ tests/cases/conformance/types/specifyingTypes/typeReferences/genericTypeReferenc
     
     class D extends I {
                     ~
-!!! error TS2304: Cannot find name 'I'.
+!!! error TS2689: Cannot extend an interface 'I'. Did you mean 'implements'?
     }
     
     interface U extends I {}

From 8a025fcff422e448092997f280dd1236a37c0adb Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 15 Jun 2016 05:52:10 -0700
Subject: [PATCH 304/332] Use helper functions to simplify range tests

---
 src/harness/fourslash.ts                      | 115 +++++++++++++-----
 .../fourslash/ambientShorthandFindAllRefs.ts  |  11 +-
 .../findAllRefsForComputedProperties.ts       |  10 +-
 .../findAllRefsForComputedProperties2.ts      |  10 +-
 .../findAllRefsForDefaultExport01.ts          |  10 +-
 .../findAllRefsForDefaultExport02.ts          |  10 +-
 .../findAllRefsForDefaultExport03.ts          |  10 +-
 .../findAllRefsForDefaultExport04.ts          |   7 +-
 .../findAllRefsForDefaultExport05.ts          |   7 +-
 .../findAllRefsForDefaultExport06.ts          |   7 +-
 .../findAllRefsForFunctionExpression01.ts     |  11 +-
 .../findAllRefsForObjectLiteralProperties.ts  |  11 +-
 .../findAllRefsForStringLiteralTypes.ts       |  10 +-
 ...findAllRefsForVariableInExtendsClause01.ts |  11 +-
 ...findAllRefsForVariableInExtendsClause02.ts |  10 +-
 .../fourslash/findAllRefsInClassExpression.ts |  10 +-
 .../findAllRefsInheritedProperties1.ts        |  19 +--
 .../findAllRefsInheritedProperties2.ts        |  19 +--
 .../findAllRefsInheritedProperties3.ts        |  27 ++--
 .../findAllRefsInheritedProperties4.ts        |  21 +---
 .../findAllRefsInheritedProperties5.ts        |  21 +---
 .../fourslash/findAllRefsInsideTemplates1.ts  |   8 +-
 .../fourslash/findAllRefsInsideTemplates2.ts  |   8 +-
 ...lRefsObjectBindingElementPropertyName01.ts |  10 +-
 ...lRefsObjectBindingElementPropertyName02.ts |  10 +-
 ...lRefsObjectBindingElementPropertyName03.ts |  10 +-
 ...lRefsObjectBindingElementPropertyName04.ts |  10 +-
 ...lRefsObjectBindingElementPropertyName06.ts |  10 +-
 ...lRefsObjectBindingElementPropertyName07.ts |  10 +-
 ...lRefsObjectBindingElementPropertyName09.ts |  10 +-
 ...lRefsObjectBindingElementPropertyName10.ts |  10 +-
 .../findAllRefsOnPrivateParameterProperty1.ts |   8 +-
 ...indAllRefsParameterPropertyDeclaration1.ts |  13 +-
 ...indAllRefsParameterPropertyDeclaration2.ts |  11 +-
 ...indAllRefsParameterPropertyDeclaration3.ts |  11 +-
 ...sPropertyContextuallyTypedByTypeParam01.ts |  10 +-
 .../findAllRefsWithLeadingUnderscoreNames1.ts |  10 +-
 .../findAllRefsWithLeadingUnderscoreNames2.ts |  10 +-
 .../findAllRefsWithLeadingUnderscoreNames3.ts |  10 +-
 .../findAllRefsWithLeadingUnderscoreNames4.ts |  10 +-
 .../findAllRefsWithLeadingUnderscoreNames5.ts |  10 +-
 .../findAllRefsWithLeadingUnderscoreNames6.ts |  10 +-
 .../findAllRefsWithLeadingUnderscoreNames7.ts |   9 +-
 .../findAllRefsWithLeadingUnderscoreNames8.ts |   9 +-
 .../findAllRefsWithLeadingUnderscoreNames9.ts |   9 +-
 tests/cases/fourslash/fourslash.ts            |  20 ++-
 ...tOccurrencesIsDefinitionOfArrowFunction.ts |   7 +-
 ...OccurrencesIsDefinitionOfBindingPattern.ts |   7 +-
 .../getOccurrencesIsDefinitionOfClass.ts      |   7 +-
 ...currencesIsDefinitionOfComputedProperty.ts |  10 +-
 .../getOccurrencesIsDefinitionOfEnum.ts       |   7 +-
 .../getOccurrencesIsDefinitionOfExport.ts     |   7 +-
 .../getOccurrencesIsDefinitionOfFunction.ts   |   7 +-
 .../getOccurrencesIsDefinitionOfInterface.ts  |   7 +-
 ...rencesIsDefinitionOfInterfaceClassMerge.ts |   7 +-
 .../getOccurrencesIsDefinitionOfNamespace.ts  |   7 +-
 ...rencesIsDefinitionOfNumberNamedProperty.ts |   7 +-
 .../getOccurrencesIsDefinitionOfParameter.ts  |   7 +-
 ...rencesIsDefinitionOfStringNamedProperty.ts |   7 +-
 .../getOccurrencesIsDefinitionOfTypeAlias.ts  |   7 +-
 .../getOccurrencesIsDefinitionOfVariable.ts   |   7 +-
 tests/cases/fourslash/referenceToClass.ts     |  27 ++--
 ...rencesForStaticsAndMembersWithSameNames.ts |  35 ++----
 ...referencesForStringLiteralPropertyNames.ts |  15 +--
 ...eferencesForStringLiteralPropertyNames2.ts |  11 +-
 ...eferencesForStringLiteralPropertyNames3.ts |  12 +-
 ...eferencesForStringLiteralPropertyNames4.ts |   3 +-
 .../fourslash/referencesForUnionProperties.ts |  24 ++--
 tests/cases/fourslash/referencesInComment.ts  |  14 +--
 .../renameImportAndExportInDiffFiles.ts       |  16 +--
 tests/cases/fourslash/server/references01.ts  |  11 +-
 .../server/referencesInConfiguredProject.ts   |  10 +-
 .../shims-pp/getReferencesAtPosition.ts       |   9 +-
 .../shims/getReferencesAtPosition.ts          |   9 +-
 74 files changed, 268 insertions(+), 659 deletions(-)

diff --git a/src/harness/fourslash.ts b/src/harness/fourslash.ts
index 9f675e3ffd0..695e19b4667 100644
--- a/src/harness/fourslash.ts
+++ b/src/harness/fourslash.ts
@@ -730,30 +730,6 @@ namespace FourSlash {
             }
         }
 
-        public verifyReferencesAtPositionListContains(fileName: string, start: number, end: number, isWriteAccess?: boolean, isDefinition?: boolean) {
-            const references = this.getReferencesAtCaret();
-
-            if (!references || references.length === 0) {
-                this.raiseError("verifyReferencesAtPositionListContains failed - found 0 references, expected at least one.");
-            }
-
-            for (let i = 0; i < references.length; i++) {
-                const reference = references[i];
-                if (reference && reference.fileName === fileName && reference.textSpan.start === start && ts.textSpanEnd(reference.textSpan) === end) {
-                    if (typeof isWriteAccess !== "undefined" && reference.isWriteAccess !== isWriteAccess) {
-                        this.raiseError(`verifyReferencesAtPositionListContains failed - item isWriteAccess value does not match, actual: ${reference.isWriteAccess}, expected: ${isWriteAccess}.`);
-                    }
-                    if (typeof isDefinition !== "undefined" && reference.isDefinition !== isDefinition) {
-                        this.raiseError(`verifyReferencesAtPositionListContains failed - item isDefinition value does not match, actual: ${reference.isDefinition}, expected: ${isDefinition}.`);
-                    }
-                    return;
-                }
-            }
-
-            const missingItem = { fileName, start, end, isWriteAccess, isDefinition };
-            this.raiseError(`verifyReferencesAtPositionListContains failed - could not find the item: ${stringify(missingItem)} in the returned list: (${stringify(references)})`);
-        }
-
         public verifyReferencesCountIs(count: number, localFilesOnly = true) {
             const references = this.getReferencesAtCaret();
             let referencesCount = 0;
@@ -777,6 +753,73 @@ namespace FourSlash {
             }
         }
 
+        public verifyReferencesAre(expectedReferences: Range[]) {
+            const actualReferences = this.getReferencesAtCaret() || [];
+
+            if (actualReferences.length > expectedReferences.length) {
+                // Find the unaccounted-for reference.
+                for (const actual of actualReferences) {
+                    if (!ts.forEach(expectedReferences, r => r.start === actual.textSpan.start)) {
+                        this.raiseError(`A reference ${actual} is unaccounted for.`);
+                    }
+                }
+                // Probably will never reach here.
+                this.raiseError(`There are ${actualReferences.length} references but only ${expectedReferences.length} were expected.`);
+            }
+
+            for (const reference of expectedReferences) {
+                const {fileName, start, end} = reference;
+                if (reference.marker) {
+                    const {isWriteAccess, isDefinition} = reference.marker.data;
+                    this.verifyReferencesWorker(actualReferences, fileName, start, end, isWriteAccess, isDefinition);
+                }
+                else {
+                    this.verifyReferencesWorker(actualReferences, fileName, start, end);
+                }
+            }
+        }
+
+        public verifyReferencesOf({fileName, start}: Range, references: Range[]) {
+            this.openFile(fileName);
+            this.goToPosition(start);
+            this.verifyReferencesAre(references);
+        }
+
+        public verifyRangesReferenceEachOther(ranges?: Range[]) {
+            ranges = ranges || this.getRanges();
+            assert(ranges.length);
+            for (const range of ranges) {
+                this.verifyReferencesOf(range, ranges);
+            }
+        }
+
+        public verifyReferencesAtPositionListContains(fileName: string, start: number, end: number, isWriteAccess?: boolean, isDefinition?: boolean) {
+            const references = this.getReferencesAtCaret();
+            if (!references || references.length === 0) {
+                this.raiseError("verifyReferencesAtPositionListContains failed - found 0 references, expected at least one.");
+            }
+            this.verifyReferencesWorker(references, fileName, start, end, isWriteAccess, isDefinition);
+        }
+
+        private verifyReferencesWorker(references: ts.ReferenceEntry[], fileName: string, start: number, end: number, isWriteAccess?: boolean, isDefinition?: boolean) {
+            for (let i = 0; i < references.length; i++) {
+                const reference = references[i];
+                if (reference && reference.fileName === fileName && reference.textSpan.start === start && ts.textSpanEnd(reference.textSpan) === end) {
+                    if (typeof isWriteAccess !== "undefined" && reference.isWriteAccess !== isWriteAccess) {
+                        this.raiseError(`verifyReferencesAtPositionListContains failed - item isWriteAccess value does not match, actual: ${reference.isWriteAccess}, expected: ${isWriteAccess}.`);
+                    }
+                    if (typeof isDefinition !== "undefined" && reference.isDefinition !== isDefinition) {
+                        this.raiseError(`verifyReferencesAtPositionListContains failed - item isDefinition value does not match, actual: ${reference.isDefinition}, expected: ${isDefinition}.`);
+                    }
+                    return;
+                }
+            }
+
+            const missingItem = { fileName, start, end, isWriteAccess, isDefinition };
+            this.raiseError(`verifyReferencesAtPositionListContains failed - could not find the item: ${stringify(missingItem)} in the returned list: (${stringify(references)})`);
+
+        }
+
         private getMemberListAtCaret() {
             return this.languageService.getCompletionsAtPosition(this.activeFile.fileName, this.currentCaretPosition);
         }
@@ -2836,14 +2879,6 @@ namespace FourSlashInterface {
             this.state.verifyMemberListIsEmpty(this.negative);
         }
 
-        public referencesCountIs(count: number) {
-            this.state.verifyReferencesCountIs(count, /*localFilesOnly*/ false);
-        }
-
-        public referencesAtPositionContains(range: FourSlash.Range, isWriteAccess?: boolean, isDefinition?: boolean) {
-            this.state.verifyReferencesAtPositionListContains(range.fileName, range.start, range.end, isWriteAccess, isDefinition);
-        }
-
         public signatureHelpPresent() {
             this.state.verifySignatureHelpPresent(!this.negative);
         }
@@ -2935,6 +2970,22 @@ namespace FourSlashInterface {
             this.state.verifyGetEmitOutputContentsForCurrentFile(expected);
         }
 
+        public referencesCountIs(count: number) {
+            this.state.verifyReferencesCountIs(count, /*localFilesOnly*/ false);
+        }
+
+        public referencesAre(ranges: FourSlash.Range[]) {
+            this.state.verifyReferencesAre(ranges);
+        }
+
+        public referencesOf(start: FourSlash.Range, references: FourSlash.Range[]) {
+            this.state.verifyReferencesOf(start, references);
+        }
+
+        public rangesReferenceEachOther(ranges?: FourSlash.Range[]) {
+            this.state.verifyRangesReferenceEachOther(ranges);
+        }
+
         public currentParameterHelpArgumentNameIs(name: string) {
             this.state.verifyCurrentParameterHelpName(name);
         }
diff --git a/tests/cases/fourslash/ambientShorthandFindAllRefs.ts b/tests/cases/fourslash/ambientShorthandFindAllRefs.ts
index 16fddd1869d..2f0dbf914e7 100644
--- a/tests/cases/fourslash/ambientShorthandFindAllRefs.ts
+++ b/tests/cases/fourslash/ambientShorthandFindAllRefs.ts
@@ -9,13 +9,4 @@
 // @Filename: user2.ts
 ////import {[|x|]} from "jquery";
 
-let ranges = test.ranges();
-for (let range of ranges) {
-    goTo.file(range.fileName);
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedRange of ranges) {
-        verify.referencesAtPositionContains(expectedRange);
-    }
-}
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsForComputedProperties.ts b/tests/cases/fourslash/findAllRefsForComputedProperties.ts
index 3ea226b3ce4..065d34c6fc5 100644
--- a/tests/cases/fourslash/findAllRefsForComputedProperties.ts
+++ b/tests/cases/fourslash/findAllRefsForComputedProperties.ts
@@ -13,12 +13,4 @@
 ////    ["[|prop1|]"]: function () { },
 ////}
 
-let ranges = test.ranges();
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedReference of ranges) {
-        verify.referencesAtPositionContains(expectedReference);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsForComputedProperties2.ts b/tests/cases/fourslash/findAllRefsForComputedProperties2.ts
index b9f6e9538eb..37a9bd8470e 100644
--- a/tests/cases/fourslash/findAllRefsForComputedProperties2.ts
+++ b/tests/cases/fourslash/findAllRefsForComputedProperties2.ts
@@ -12,12 +12,4 @@
 ////    ["[|42|]"]: function () { }
 ////}
 
-let ranges = test.ranges();
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedReference of ranges) {
-        verify.referencesAtPositionContains(expectedReference);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsForDefaultExport01.ts b/tests/cases/fourslash/findAllRefsForDefaultExport01.ts
index 2f40af93c02..39079294a3b 100644
--- a/tests/cases/fourslash/findAllRefsForDefaultExport01.ts
+++ b/tests/cases/fourslash/findAllRefsForDefaultExport01.ts
@@ -7,12 +7,4 @@
 ////
 ////var y = new [|DefaultExportedClass|];
 
-let ranges = test.ranges()
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedReference of ranges) {
-        verify.referencesAtPositionContains(expectedReference);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsForDefaultExport02.ts b/tests/cases/fourslash/findAllRefsForDefaultExport02.ts
index db773c74e3c..19f31ece9b0 100644
--- a/tests/cases/fourslash/findAllRefsForDefaultExport02.ts
+++ b/tests/cases/fourslash/findAllRefsForDefaultExport02.ts
@@ -8,12 +8,4 @@
 ////
 ////var y = [|DefaultExportedFunction|]();
 
-let ranges = test.ranges()
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedReference of ranges) {
-        verify.referencesAtPositionContains(expectedReference);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsForDefaultExport03.ts b/tests/cases/fourslash/findAllRefsForDefaultExport03.ts
index f753d17de49..b9bbfa14a64 100644
--- a/tests/cases/fourslash/findAllRefsForDefaultExport03.ts
+++ b/tests/cases/fourslash/findAllRefsForDefaultExport03.ts
@@ -14,12 +14,4 @@
 ////    var local = 100;
 ////}
 
-let ranges = test.ranges()
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedReference of ranges) {
-        verify.referencesAtPositionContains(expectedReference);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsForDefaultExport04.ts b/tests/cases/fourslash/findAllRefsForDefaultExport04.ts
index 45b008b55fe..44b7ee0a06f 100644
--- a/tests/cases/fourslash/findAllRefsForDefaultExport04.ts
+++ b/tests/cases/fourslash/findAllRefsForDefaultExport04.ts
@@ -20,9 +20,4 @@
 // site is included in the references to the namespace.
 
 goTo.marker();
-let ranges = test.ranges();
-verify.referencesCountIs(ranges.length);
-
-for (let expectedReference of ranges) {
-    verify.referencesAtPositionContains(expectedReference);
-}
+verify.referencesAre(test.ranges());
diff --git a/tests/cases/fourslash/findAllRefsForDefaultExport05.ts b/tests/cases/fourslash/findAllRefsForDefaultExport05.ts
index 6655138da3b..0f06792458d 100644
--- a/tests/cases/fourslash/findAllRefsForDefaultExport05.ts
+++ b/tests/cases/fourslash/findAllRefsForDefaultExport05.ts
@@ -20,9 +20,4 @@
 // and all value-uses of 'f' are included in the references to the function.
 
 goTo.marker();
-let ranges = test.ranges();
-verify.referencesCountIs(ranges.length);
-
-for (let expectedReference of ranges) {
-    verify.referencesAtPositionContains(expectedReference);
-}
+verify.referencesAre(test.ranges());
diff --git a/tests/cases/fourslash/findAllRefsForDefaultExport06.ts b/tests/cases/fourslash/findAllRefsForDefaultExport06.ts
index 12c187b4b0c..cdd9b4f980c 100644
--- a/tests/cases/fourslash/findAllRefsForDefaultExport06.ts
+++ b/tests/cases/fourslash/findAllRefsForDefaultExport06.ts
@@ -20,9 +20,4 @@
 // and all value-uses of 'f' are included in the references to the function.
 
 goTo.marker();
-let ranges = test.ranges();
-verify.referencesCountIs(ranges.length);
-
-for (let expectedReference of ranges) {
-    verify.referencesAtPositionContains(expectedReference);
-}
+verify.referencesAre(test.ranges());
diff --git a/tests/cases/fourslash/findAllRefsForFunctionExpression01.ts b/tests/cases/fourslash/findAllRefsForFunctionExpression01.ts
index a312a277ebb..35d5c45e3d9 100644
--- a/tests/cases/fourslash/findAllRefsForFunctionExpression01.ts
+++ b/tests/cases/fourslash/findAllRefsForFunctionExpression01.ts
@@ -9,13 +9,4 @@
 /////// <reference path="file1.ts" />
 ////foo();
 
-
-let ranges = test.ranges()
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedReference of ranges) {
-        verify.referencesAtPositionContains(expectedReference);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsForObjectLiteralProperties.ts b/tests/cases/fourslash/findAllRefsForObjectLiteralProperties.ts
index cb5e702dc90..cea4db81ea1 100644
--- a/tests/cases/fourslash/findAllRefsForObjectLiteralProperties.ts
+++ b/tests/cases/fourslash/findAllRefsForObjectLiteralProperties.ts
@@ -8,13 +8,4 @@
 ////
 ////let {[|property|]: pVar} = x;
 
-
-let ranges = test.ranges();
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedReference of ranges) {
-        verify.referencesAtPositionContains(expectedReference);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsForStringLiteralTypes.ts b/tests/cases/fourslash/findAllRefsForStringLiteralTypes.ts
index dcf7240312c..45e981d8a84 100644
--- a/tests/cases/fourslash/findAllRefsForStringLiteralTypes.ts
+++ b/tests/cases/fourslash/findAllRefsForStringLiteralTypes.ts
@@ -3,12 +3,4 @@
 ////type Options = "[|option 1|]" | "option 2";
 ////let myOption: Options = "[|option 1|]";
 
-let ranges = test.ranges();
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedReference of ranges) {
-        verify.referencesAtPositionContains(expectedReference);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsForVariableInExtendsClause01.ts b/tests/cases/fourslash/findAllRefsForVariableInExtendsClause01.ts
index 1ec144d7e82..dd8fb1026c4 100644
--- a/tests/cases/fourslash/findAllRefsForVariableInExtendsClause01.ts
+++ b/tests/cases/fourslash/findAllRefsForVariableInExtendsClause01.ts
@@ -1,15 +1,6 @@
 /// <reference path="fourslash.ts"/>
 
-
 ////var [|Base|] = class { };
 ////class C extends [|Base|] { }
 
-let ranges = test.ranges();
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedReference of ranges) {
-        verify.referencesAtPositionContains(expectedReference);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsForVariableInExtendsClause02.ts b/tests/cases/fourslash/findAllRefsForVariableInExtendsClause02.ts
index 0f06a3c4202..3fc41358dfd 100644
--- a/tests/cases/fourslash/findAllRefsForVariableInExtendsClause02.ts
+++ b/tests/cases/fourslash/findAllRefsForVariableInExtendsClause02.ts
@@ -6,12 +6,4 @@
 ////    interface I extends [|Base|] { }
 ////}
 
-let ranges = test.ranges();
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedReference of ranges) {
-        verify.referencesAtPositionContains(expectedReference);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsInClassExpression.ts b/tests/cases/fourslash/findAllRefsInClassExpression.ts
index 951acdd336c..f874bcbcb5c 100644
--- a/tests/cases/fourslash/findAllRefsInClassExpression.ts
+++ b/tests/cases/fourslash/findAllRefsInClassExpression.ts
@@ -5,12 +5,4 @@
 ////   [|boom|](){}
 ////}
 
-let ranges = test.ranges()
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedReference of ranges) {
-        verify.referencesAtPositionContains(expectedReference);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsInheritedProperties1.ts b/tests/cases/fourslash/findAllRefsInheritedProperties1.ts
index b2755923d37..358ba3f249d 100644
--- a/tests/cases/fourslash/findAllRefsInheritedProperties1.ts
+++ b/tests/cases/fourslash/findAllRefsInheritedProperties1.ts
@@ -9,17 +9,8 @@
 //// v.[|doStuff|]();
 //// v.[|propName|];
 
-function verifyReferences(query: FourSlashInterface.Range, references: FourSlashInterface.Range[]) {
-    goTo.position(query.start);
-    for (const ref of references) {
-        verify.referencesAtPositionContains(ref);
-    }
-}
-
-const ranges = test.ranges();
-verify.assertHasRanges(ranges);
-const [r0, r1, r2, r3] = ranges;
-verifyReferences(r0, [r0, r2]);
-verifyReferences(r1, [r1, r3]);
-verifyReferences(r2, [r0, r2]);
-verifyReferences(r3, [r1, r3]);
\ No newline at end of file
+const [r0, r1, r2, r3] = test.ranges();
+verify.referencesOf(r0, [r0, r2]);
+verify.referencesOf(r1, [r1, r3]);
+verify.referencesOf(r2, [r0, r2]);
+verify.referencesOf(r3, [r1, r3]);
diff --git a/tests/cases/fourslash/findAllRefsInheritedProperties2.ts b/tests/cases/fourslash/findAllRefsInheritedProperties2.ts
index 1ab92c251da..9fe36fbb48e 100644
--- a/tests/cases/fourslash/findAllRefsInheritedProperties2.ts
+++ b/tests/cases/fourslash/findAllRefsInheritedProperties2.ts
@@ -9,17 +9,8 @@
 //// v.[|doStuff|]();  // r2
 //// v.[|propName|];   // r3
 
-function verifyReferences(query: FourSlashInterface.Range, references: FourSlashInterface.Range[]) {
-    goTo.position(query.start);
-    for (const ref of references) {
-        verify.referencesAtPositionContains(ref);
-    }
-}
-
-const ranges = test.ranges();
-verify.assertHasRanges(ranges);
-const [r0, r1, r2, r3] = ranges;
-verifyReferences(r0, [r0, r2]);
-verifyReferences(r1, [r1, r3]);
-verifyReferences(r2, [r0, r2]);
-verifyReferences(r3, [r1, r3]);
\ No newline at end of file
+const [r0, r1, r2, r3] = test.ranges();
+verify.referencesOf(r0, [r0, r2]);
+verify.referencesOf(r1, [r1, r3]);
+verify.referencesOf(r2, [r0, r2]);
+verify.referencesOf(r3, [r1, r3]);
diff --git a/tests/cases/fourslash/findAllRefsInheritedProperties3.ts b/tests/cases/fourslash/findAllRefsInheritedProperties3.ts
index 9a46b08f357..772fb78a2e8 100644
--- a/tests/cases/fourslash/findAllRefsInheritedProperties3.ts
+++ b/tests/cases/fourslash/findAllRefsInheritedProperties3.ts
@@ -17,21 +17,12 @@
 //// v.[|propName|];   // r6
 //// v.[|doStuff|]();  // r7
 
-function verifyReferences(query: FourSlashInterface.Range, references: FourSlashInterface.Range[]) {
-    goTo.position(query.start);
-    for (const ref of references) {
-        verify.referencesAtPositionContains(ref);
-    }
-}
-
-const ranges = test.ranges();
-verify.assertHasRanges(ranges);
-const [r0, r1, r2, r3, r4, r5, r6, r7] = ranges;
-verifyReferences(r0, [r0]);
-verifyReferences(r1, [r1, r5, r6]);
-verifyReferences(r2, [r2, r4, r7]);
-verifyReferences(r3, [r3, r5, r6]);
-verifyReferences(r4, [r2, r4, r7]);
-verifyReferences(r5, [r1, r3, r5, r6]);
-verifyReferences(r6, [r1, r3, r5, r6]);
-verifyReferences(r7, [r2, r4, r7]);
\ No newline at end of file
+const [r0, r1, r2, r3, r4, r5, r6, r7] = test.ranges();
+verify.referencesOf(r0, [r0, r4, r7]);
+verify.referencesOf(r1, [r1, r5, r6]);
+verify.referencesOf(r2, [r2, r4, r7]);
+verify.referencesOf(r3, [r3, r5, r6]);
+verify.referencesOf(r4, [r0, r2, r4, r7]);
+verify.referencesOf(r5, [r1, r3, r5, r6]);
+verify.referencesOf(r6, [r1, r3, r5, r6]);
+verify.referencesOf(r7, [r0, r2, r4, r7]);
diff --git a/tests/cases/fourslash/findAllRefsInheritedProperties4.ts b/tests/cases/fourslash/findAllRefsInheritedProperties4.ts
index bcd41331f73..1ecb85bfae1 100644
--- a/tests/cases/fourslash/findAllRefsInheritedProperties4.ts
+++ b/tests/cases/fourslash/findAllRefsInheritedProperties4.ts
@@ -13,18 +13,9 @@
 //// d.[|prop0|];  // r3
 //// d.[|prop1|];  // r4
 
-function verifyReferences(query: FourSlashInterface.Range, references: FourSlashInterface.Range[]) {
-    goTo.position(query.start);
-    for (const ref of references) {
-        verify.referencesAtPositionContains(ref);
-    }
-}
-
-const ranges = test.ranges();
-verify.assertHasRanges(ranges);
-const [r0, r1, r2, r3, r4] = ranges;
-verifyReferences(r0, [r0, r2, r3]);
-verifyReferences(r1, [r1]);
-verifyReferences(r2, [r0, r2, r3]);
-verifyReferences(r3, [r0, r2, r3]);
-verifyReferences(r4, []);
\ No newline at end of file
+const [r0, r1, r2, r3, r4] = test.ranges();
+verify.referencesOf(r0, [r0, r2, r3]);
+verify.referencesOf(r1, [r1]);
+verify.referencesOf(r2, [r0, r2, r3]);
+verify.referencesOf(r3, [r0, r2, r3]);
+verify.referencesOf(r4, []);
diff --git a/tests/cases/fourslash/findAllRefsInheritedProperties5.ts b/tests/cases/fourslash/findAllRefsInheritedProperties5.ts
index d4e02a36b09..6d6dbb392bf 100644
--- a/tests/cases/fourslash/findAllRefsInheritedProperties5.ts
+++ b/tests/cases/fourslash/findAllRefsInheritedProperties5.ts
@@ -13,18 +13,9 @@
 //// d.[|prop0|];  // r3
 //// d.[|prop1|];  // r4
 
-function verifyReferences(query: FourSlashInterface.Range, references: FourSlashInterface.Range[]) {
-    goTo.position(query.start);
-    for (const ref of references) {
-        verify.referencesAtPositionContains(ref);
-    }
-}
-
-const ranges = test.ranges();
-verify.assertHasRanges(ranges);
-const [r0, r1, r2, r3, r4] = ranges;
-verifyReferences(r0, [r0]);
-verifyReferences(r1, [r1]);
-verifyReferences(r2, [r2, r3]);
-verifyReferences(r3, [r2, r3]);
-verifyReferences(r4, []);
+const [r0, r1, r2, r3, r4] = test.ranges();
+verify.referencesOf(r0, [r0]);
+verify.referencesOf(r1, [r1]);
+verify.referencesOf(r2, [r2, r3]);
+verify.referencesOf(r3, [r2, r3]);
+verify.referencesOf(r4, []);
diff --git a/tests/cases/fourslash/findAllRefsInsideTemplates1.ts b/tests/cases/fourslash/findAllRefsInsideTemplates1.ts
index dd4461751de..9ab4c624230 100644
--- a/tests/cases/fourslash/findAllRefsInsideTemplates1.ts
+++ b/tests/cases/fourslash/findAllRefsInsideTemplates1.ts
@@ -3,10 +3,4 @@
 ////var [|x|] = 10;
 ////var y = `${ [|x|] } ${ [|x|] }`
 
-test.ranges().forEach(targetRange => {
-    goTo.position(targetRange.start);
-
-    test.ranges().forEach(range => {
-        verify.referencesAtPositionContains(range);
-    });
-});
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsInsideTemplates2.ts b/tests/cases/fourslash/findAllRefsInsideTemplates2.ts
index 7f585234082..63265eb944b 100644
--- a/tests/cases/fourslash/findAllRefsInsideTemplates2.ts
+++ b/tests/cases/fourslash/findAllRefsInsideTemplates2.ts
@@ -3,10 +3,4 @@
 ////function [|f|](...rest: any[]) { }
 ////[|f|] `${ [|f|] } ${ [|f|] }`
 
-test.ranges().forEach(targetRange => {
-    goTo.position(targetRange.start);
-
-    test.ranges().forEach(range => {
-        verify.referencesAtPositionContains(range);
-    });
-});
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName01.ts b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName01.ts
index 0d03561515d..895b2168b23 100644
--- a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName01.ts
+++ b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName01.ts
@@ -8,12 +8,4 @@
 ////var foo: I;
 ////var { [|property1|]: prop1 } = foo;
 
-let ranges = test.ranges();
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedRange of ranges) {
-        verify.referencesAtPositionContains(expectedRange);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName02.ts b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName02.ts
index 86514051557..67a31f33d1e 100644
--- a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName02.ts
+++ b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName02.ts
@@ -8,12 +8,4 @@
 ////var foo: I;
 ////var { [|property1|]: {} } = foo;
 
-let ranges = test.ranges();
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedRange of ranges) {
-        verify.referencesAtPositionContains(expectedRange);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName03.ts b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName03.ts
index 8dc2b1e7bb8..40ecf0139a7 100644
--- a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName03.ts
+++ b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName03.ts
@@ -8,12 +8,4 @@
 ////var foo: I;
 ////var [{ [|property1|]: prop1 }, { [|property1|], property2 } ] = [foo, foo];
 
-let ranges = test.ranges();
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedRange of ranges) {
-        verify.referencesAtPositionContains(expectedRange);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName04.ts b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName04.ts
index dfa0997774e..5696d242fed 100644
--- a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName04.ts
+++ b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName04.ts
@@ -5,17 +5,11 @@
 ////    property2: string;
 ////}
 ////
-////function f({ /**/[|property1|]: p1 }: I,
+////function f({ [|property1|]: p1 }: I,
 ////           { [|property1|] }: I,
 ////           { property1: p2 }) {
 ////
 ////    return [|property1|] + 1;
 ////}
 
-goTo.marker();
-
-let ranges = test.ranges();
-verify.referencesCountIs(ranges.length);
-for (let expectedRange of ranges) {
-    verify.referencesAtPositionContains(expectedRange);
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName06.ts b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName06.ts
index 379d1d4d5f5..8be45ac87e6 100644
--- a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName06.ts
+++ b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName06.ts
@@ -19,12 +19,4 @@
 // Note: if this test ever changes, consider updating
 //       'quickInfoForObjectBindingElementPropertyName05.ts'
 
-let ranges = test.ranges();
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedRange of ranges) {
-        verify.referencesAtPositionContains(expectedRange);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName07.ts b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName07.ts
index 6448d2396b3..96f414dc060 100644
--- a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName07.ts
+++ b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName07.ts
@@ -4,12 +4,4 @@
 ////
 ////p, [{ [|a|]: p, b }] = [{ [|a|]: 10, b: true }];
 
-let ranges = test.ranges();
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedRange of ranges) {
-        verify.referencesAtPositionContains(expectedRange);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName09.ts b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName09.ts
index 0b82c73e31d..5696d242fed 100644
--- a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName09.ts
+++ b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName09.ts
@@ -6,16 +6,10 @@
 ////}
 ////
 ////function f({ [|property1|]: p1 }: I,
-////           { /**/[|property1|] }: I,
+////           { [|property1|] }: I,
 ////           { property1: p2 }) {
 ////
 ////    return [|property1|] + 1;
 ////}
 
-goTo.marker();
-
-let ranges = test.ranges();
-verify.referencesCountIs(ranges.length);
-for (let expectedRange of ranges) {
-    verify.referencesAtPositionContains(expectedRange);
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName10.ts b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName10.ts
index 7b8be1aa91c..6ffa4b03b68 100644
--- a/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName10.ts
+++ b/tests/cases/fourslash/findAllRefsObjectBindingElementPropertyName10.ts
@@ -8,12 +8,4 @@
 ////function f ({ [|next|]: { [|next|]: x} }: Recursive) {
 ////}
 
-let ranges = test.ranges();
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedRange of ranges) {
-        verify.referencesAtPositionContains(expectedRange);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsOnPrivateParameterProperty1.ts b/tests/cases/fourslash/findAllRefsOnPrivateParameterProperty1.ts
index 6686a771b34..3b8b5084a6b 100644
--- a/tests/cases/fourslash/findAllRefsOnPrivateParameterProperty1.ts
+++ b/tests/cases/fourslash/findAllRefsOnPrivateParameterProperty1.ts
@@ -9,10 +9,4 @@
 ////    }
 ////}
 
-test.ranges().forEach(r => {
-    goTo.position(r.start);
-
-    test.ranges().forEach(range => {
-        verify.referencesAtPositionContains(range);
-    });
-});
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration1.ts b/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration1.ts
index 4018698f4ef..8f30e3cc853 100644
--- a/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration1.ts
+++ b/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration1.ts
@@ -7,15 +7,4 @@
 ////     }
 //// }
 
-const ranges = test.ranges();
-verify.assertHasRanges(ranges);
-for (const range of ranges) {
-    goTo.position(range.start);
-
-    if (ranges.length) {
-        verify.referencesCountIs(ranges.length);
-        for (const expectedRange of ranges) {
-            verify.referencesAtPositionContains(expectedRange);
-        }
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration2.ts b/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration2.ts
index a450a77e2dc..d9656e8b5cf 100644
--- a/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration2.ts
+++ b/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration2.ts
@@ -7,13 +7,4 @@
 ////     }
 //// }
 
-let ranges = test.ranges();
-verify.assertHasRanges(ranges);
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedRange of ranges) {
-        verify.referencesAtPositionContains(expectedRange);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration3.ts b/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration3.ts
index 82fd67dfc9b..dc48ffedb21 100644
--- a/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration3.ts
+++ b/tests/cases/fourslash/findAllRefsParameterPropertyDeclaration3.ts
@@ -7,13 +7,4 @@
 ////     }
 //// }
 
-const ranges = test.ranges();
-verify.assertHasRanges(ranges);
-for (const range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (const expectedRange of ranges) {
-        verify.referencesAtPositionContains(expectedRange);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsPropertyContextuallyTypedByTypeParam01.ts b/tests/cases/fourslash/findAllRefsPropertyContextuallyTypedByTypeParam01.ts
index 357b355971d..f5b0143ac4b 100644
--- a/tests/cases/fourslash/findAllRefsPropertyContextuallyTypedByTypeParam01.ts
+++ b/tests/cases/fourslash/findAllRefsPropertyContextuallyTypedByTypeParam01.ts
@@ -17,12 +17,4 @@
 ////    [|a|]: "ss"
 ////};
 
-let ranges = test.ranges()
-for (let range of ranges) {
-    goTo.position(range.start);
-
-    verify.referencesCountIs(ranges.length);
-    for (let expectedReference of ranges) {
-        verify.referencesAtPositionContains(expectedReference);
-    }
-}
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames1.ts b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames1.ts
index 369258832a9..7cc47ee34ea 100644
--- a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames1.ts
+++ b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames1.ts
@@ -7,12 +7,4 @@
 ////var x: Foo;
 ////x.[|_bar|];
 
-
-test.ranges().forEach(r1 => {
-    goTo.position(r1.start);
-    verify.referencesCountIs(2);
-
-    test.ranges().forEach(r2 => {
-        verify.referencesAtPositionContains(r2);
-    });
-});
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames2.ts b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames2.ts
index 53adb8236a4..d1449016b59 100644
--- a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames2.ts
+++ b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames2.ts
@@ -7,12 +7,4 @@
 ////var x: Foo;
 ////x.[|__bar|];
 
-
-test.ranges().forEach(r1 => {
-    goTo.position(r1.start);
-    verify.referencesCountIs(2);
-
-    test.ranges().forEach(r2 => {
-        verify.referencesAtPositionContains(r2);
-    });
-});
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames3.ts b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames3.ts
index 1793ec6ddc4..e0d6f7f3456 100644
--- a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames3.ts
+++ b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames3.ts
@@ -7,12 +7,4 @@
 ////var x: Foo;
 ////x.[|___bar|];
 
-
-test.ranges().forEach(r1 => {
-    goTo.position(r1.start);
-    verify.referencesCountIs(2);
-
-    test.ranges().forEach(r2 => {
-        verify.referencesAtPositionContains(r2);
-    });
-});
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames4.ts b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames4.ts
index 694ecdc79ab..5a8de54db4d 100644
--- a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames4.ts
+++ b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames4.ts
@@ -7,12 +7,4 @@
 ////var x: Foo;
 ////x.[|____bar|];
 
-
-test.ranges().forEach(r1 => {
-    goTo.position(r1.start);
-    verify.referencesCountIs(2);
-
-    test.ranges().forEach(r2 => {
-        verify.referencesAtPositionContains(r2);
-    });
-});
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames5.ts b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames5.ts
index a110597f4b7..4ab28f164fe 100644
--- a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames5.ts
+++ b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames5.ts
@@ -13,12 +13,4 @@
 ////x.[|___bar|];
 ////x.____bar;
 
-
-test.ranges().forEach(r1 => {
-    goTo.position(r1.start);
-    verify.referencesCountIs(2);
-
-    test.ranges().forEach(r2 => {
-        verify.referencesAtPositionContains(r2);
-    });
-});
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames6.ts b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames6.ts
index 97ed29eb178..191b0bdbc14 100644
--- a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames6.ts
+++ b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames6.ts
@@ -13,12 +13,4 @@
 ////x.___bar;
 ////x.____bar;
 
-
-test.ranges().forEach(r1 => {
-    goTo.position(r1.start);
-    verify.referencesCountIs(2);
-
-    test.ranges().forEach(r2 => {
-        verify.referencesAtPositionContains(r2);
-    });
-});
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames7.ts b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames7.ts
index afcaf625ede..f3578193096 100644
--- a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames7.ts
+++ b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames7.ts
@@ -4,11 +4,4 @@
 ////    [|__foo|]();
 ////}
 
-test.ranges().forEach(r => {
-    goTo.position(r.start);
-    verify.referencesCountIs(2);
-
-    test.ranges().forEach(range => {
-        verify.referencesAtPositionContains(range);
-    });
-});
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames8.ts b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames8.ts
index 08ed3414366..15c66f4e7c6 100644
--- a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames8.ts
+++ b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames8.ts
@@ -4,11 +4,4 @@
 ////    [|__foo|]();
 ////})
 
-test.ranges().forEach(r => {
-    goTo.position(r.start);
-    verify.referencesCountIs(2);
-
-    test.ranges().forEach(range => {
-        verify.referencesAtPositionContains(range);
-    });
-});
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames9.ts b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames9.ts
index a3923783c46..cc33b618c41 100644
--- a/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames9.ts
+++ b/tests/cases/fourslash/findAllRefsWithLeadingUnderscoreNames9.ts
@@ -4,11 +4,4 @@
 ////    [|___foo|]();
 ////})
 
-test.ranges().forEach(r => {
-    goTo.position(r.start);
-    verify.referencesCountIs(2);
-
-    test.ranges().forEach(range => {
-        verify.referencesAtPositionContains(range);
-    });
-});
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/fourslash.ts b/tests/cases/fourslash/fourslash.ts
index 78de5b02358..dd8a61ac458 100644
--- a/tests/cases/fourslash/fourslash.ts
+++ b/tests/cases/fourslash/fourslash.ts
@@ -124,8 +124,6 @@ declare namespace FourSlashInterface {
         completionListIsEmpty(): void;
         completionListAllowsNewIdentifier(): void;
         memberListIsEmpty(): void;
-        referencesCountIs(count: number): void;
-        referencesAtPositionContains(range: Range, isWriteAccess?: boolean, isDefinition?: boolean): void;
         signatureHelpPresent(): void;
         errorExistsBetweenMarkers(startMarker: string, endMarker: string): void;
         errorExistsAfterMarker(markerName?: string): void;
@@ -154,6 +152,24 @@ declare namespace FourSlashInterface {
         currentFileContentIs(text: string): void;
         verifyGetEmitOutputForCurrentFile(expected: string): void;
         verifyGetEmitOutputContentsForCurrentFile(expected: ts.OutputFile[]): void;
+        referencesCountIs(count: number): void;
+        /**
+         * Asserts that the given ranges are the references from the current position.
+         * If ranges have markers, those markers may have "isDefinition" and "isWriteAccess" data
+         * (otherwise these properties pf the reference are not tested).
+         * Order of ranges does not matter.
+         */
+        referencesAre(ranges: Range[]): void;
+        /**
+         * Like `referencesAre`, but goes to `start` first.
+         * `start` should be included in `references`.
+         */
+        referencesOf(start: Range, references: Range[]): void;
+        /**
+         * Performs `referencesOf` for every range on the whole set.
+         * If `ranges` is omitted, this is `test.ranges()`.
+         */
+        rangesReferenceEachOther(ranges?: Range[]): void;
         currentParameterHelpArgumentNameIs(name: string): void;
         currentParameterSpanIs(parameter: string): void;
         currentParameterHelpArgumentDocCommentIs(docComment: string): void;
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfArrowFunction.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfArrowFunction.ts
index eb9980c946d..57b4c14ffba 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfArrowFunction.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfArrowFunction.ts
@@ -1,8 +1,5 @@
 /// <reference path='fourslash.ts' />
 ////var [|{| "isDefinition": true |}f|] = x => x + 1;
 ////[|{| "isDefinition": false |}f|](12);
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfBindingPattern.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfBindingPattern.ts
index 9a30687c59e..e60921ec3b8 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfBindingPattern.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfBindingPattern.ts
@@ -1,8 +1,5 @@
 /// <reference path='fourslash.ts' />
 ////const { [|{| "isDefinition": true |}x|], y } = { x: 1, y: 2 };
 ////const z = [|{| "isDefinition": false |}x|];
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfClass.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfClass.ts
index 04b1f90681a..0a3c2e4231c 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfClass.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfClass.ts
@@ -6,8 +6,5 @@
 ////    }
 ////}
 ////let c = new [|{| "isDefinition": false |}C|]();
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfComputedProperty.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfComputedProperty.ts
index 8896694db50..81df97eff2d 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfComputedProperty.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfComputedProperty.ts
@@ -1,9 +1,7 @@
 /// <reference path='fourslash.ts' />
-////let o = { ["[|{| "isDefinition": true |}foo|]"]: 12 };
+////let o = { ["/**/[|{| "isDefinition": true |}foo|]"]: 12 };
 ////let y = o.[|{| "isDefinition": false |}foo|];
 ////let z = o['[|{| "isDefinition": false |}foo|]'];
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+goTo.marker();
+verify.referencesAre(test.ranges());
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfEnum.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfEnum.ts
index a5764206bce..5b77bf6158a 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfEnum.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfEnum.ts
@@ -4,8 +4,5 @@
 ////    Second
 ////}
 ////let first = [|{| "isDefinition": false |}E|].First;
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfExport.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfExport.ts
index f863af9184f..759df4fa383 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfExport.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfExport.ts
@@ -4,8 +4,5 @@
 // @Filename: main.ts
 ////import { [|{| "isDefinition": true |}x|] } from "./m";
 ////const y = [|{| "isDefinition": false |}x|];
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfFunction.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfFunction.ts
index 456d953092d..357ef088d61 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfFunction.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfFunction.ts
@@ -2,8 +2,5 @@
 ////function [|{| "isDefinition": true |}func|](x: number) {
 ////}
 ////[|{| "isDefinition": false |}func|](x)
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterface.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterface.ts
index 51d1e858185..b7117995d84 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterface.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterface.ts
@@ -3,8 +3,5 @@
 ////    p: number;
 ////}
 ////let i: [|{| "isDefinition": false |}I|] = { p: 12 };
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterfaceClassMerge.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterfaceClassMerge.ts
index 7efefa17a4b..b0506490c70 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterfaceClassMerge.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfInterfaceClassMerge.ts
@@ -12,8 +12,5 @@
 ////}
 ////let i: [|{| "isDefinition": false |}Numbers|] = new [|{| "isDefinition": false |}Numbers|]();
 ////let x = i.f(i.p + i.m);
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfNamespace.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfNamespace.ts
index 86b92ec9ce7..ff1cf00fa9b 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfNamespace.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfNamespace.ts
@@ -3,8 +3,5 @@
 ////    export var n = 12;
 ////}
 ////let x = [|{| "isDefinition": false |}Numbers|].n + 1;
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfNumberNamedProperty.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfNumberNamedProperty.ts
index 7e3e084948f..a041dab435a 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfNumberNamedProperty.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfNumberNamedProperty.ts
@@ -1,8 +1,5 @@
 /// <reference path='fourslash.ts' />
 ////let o = { [|{| "isDefinition": true |}1|]: 12 };
 ////let y = o[[|{| "isDefinition": false |}1|]];
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfParameter.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfParameter.ts
index cdb0e281d53..cdcc47014fd 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfParameter.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfParameter.ts
@@ -2,8 +2,5 @@
 ////function f([|{| "isDefinition": true |}x|]: number) {
 ////  return [|{| "isDefinition": false |}x|] + 1
 ////}
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfStringNamedProperty.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfStringNamedProperty.ts
index 291aec90dda..383cf49a2e3 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfStringNamedProperty.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfStringNamedProperty.ts
@@ -1,8 +1,5 @@
 /// <reference path='fourslash.ts' />
 ////let o = { "[|{| "isDefinition": true |}x|]": 12 };
 ////let y = o.[|{| "isDefinition": false |}x|];
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfTypeAlias.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfTypeAlias.ts
index 44a7c64a93a..2bd66830c69 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfTypeAlias.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfTypeAlias.ts
@@ -1,8 +1,5 @@
 /// <reference path='fourslash.ts' />
 ////type [|{| "isDefinition": true |}Alias|]= number;
 ////let n: [|{| "isDefinition": false |}Alias|] = 12;
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/getOccurrencesIsDefinitionOfVariable.ts b/tests/cases/fourslash/getOccurrencesIsDefinitionOfVariable.ts
index 8d046c67e3a..78529186ad3 100644
--- a/tests/cases/fourslash/getOccurrencesIsDefinitionOfVariable.ts
+++ b/tests/cases/fourslash/getOccurrencesIsDefinitionOfVariable.ts
@@ -16,8 +16,5 @@
 ////
 ////[|{| "isDefinition": false |}x|] += 1;
 ////[|{| "isDefinition": false |}x|] <<= 1;
-var firstRange = test.ranges()[0];
-goTo.position(firstRange.start, firstRange.fileName);
-test.ranges().forEach(range => {
-    verify.referencesAtPositionContains(range, undefined, range.marker.data.isDefinition);
-});
+
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/referenceToClass.ts b/tests/cases/fourslash/referenceToClass.ts
index 2907a468577..3e523487bd1 100644
--- a/tests/cases/fourslash/referenceToClass.ts
+++ b/tests/cases/fourslash/referenceToClass.ts
@@ -3,34 +3,21 @@
 // Class references should work across file and not find local variables.
 
 // @Filename: referenceToClass_1.ts
-////class /*1*/foo {
-////    public n: /*2*/foo;
+////class [|foo|] {
+////    public n: [|foo|];
 ////    public foo: number;
 ////}
 ////
 ////class bar {
-////    public n: fo/*3*/o;
-////    public k = new foo();
+////    public n: [|foo|];
+////    public k = new [|foo|]();
 ////}
 ////
 ////module mod {
-////    var k: foo = null;
+////    var k: [|foo|] = null;
 ////}
 
 // @Filename: referenceToClass_2.ts
-////var k: /*4*/foo;
+////var k: [|foo|];
 
-goTo.marker("1");
-verify.referencesCountIs(6);
-
-goTo.marker("2");
-
-verify.referencesCountIs(6);
-
-goTo.marker("3");
-
-verify.referencesCountIs(6);
-
-goTo.marker("4");
-
-verify.referencesCountIs(6);
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/referencesForStaticsAndMembersWithSameNames.ts b/tests/cases/fourslash/referencesForStaticsAndMembersWithSameNames.ts
index fe83f47757b..cada3e0fcf4 100644
--- a/tests/cases/fourslash/referencesForStaticsAndMembersWithSameNames.ts
+++ b/tests/cases/fourslash/referencesForStaticsAndMembersWithSameNames.ts
@@ -3,12 +3,12 @@
 ////module FindRef4 {
 ////	module MixedStaticsClassTest {
 ////		export class Foo {
-////			b/*3*/ar: Foo;
-////			static b/*4*/ar: Foo;
+////			[|bar|]: Foo;
+////			static [|bar|]: Foo;
 ////
-////			public f/*1*/oo(): void {
+////			public [|foo|](): void {
 ////			}
-////			public static f/*2*/oo(): void {
+////			public static [|foo|](): void {
 ////			}
 ////		}
 ////	}
@@ -16,34 +16,25 @@
 ////	function test() {
 ////		// instance function
 ////		var x = new MixedStaticsClassTest.Foo();
-////		x.foo();
-////		x.bar;
-////
-////		var y = new MixedStaticsClassTest.Foo();
-////		y.foo();
-////		y.bar;
+////		x.[|foo|]();
+////		x.[|bar|];
 ////
 ////		// static function
-////		MixedStaticsClassTest.Foo.foo();
-////		MixedStaticsClassTest.Foo.bar;
+////		MixedStaticsClassTest.Foo.[|foo|]();
+////		MixedStaticsClassTest.Foo.[|bar|];
 ////	}
 ////}
 
-// this line triggers a semantic/syntactic error check, remove line when 788570 is fixed
-edit.insert('');
+const [fooBar, fooStaticBar, fooFoo, fooStaticFoo, xFoo, xBar, staticFoo, staticBar] = test.ranges();
 
 // References to a member method with the same name as a static.
-goTo.marker("1");
-verify.referencesCountIs(3);
+verify.referencesOf(fooFoo, [fooFoo, xFoo]);
 
 // References to a static method with the same name as a member.
-goTo.marker("2");
-verify.referencesCountIs(2);
+verify.referencesOf(fooStaticFoo, [fooStaticFoo, staticFoo]);
 
 // References to a member property with the same name as a static.
-goTo.marker("3");
-verify.referencesCountIs(3);
+verify.referencesOf(fooBar, [fooBar, xBar]);
 
 // References to a static property with the same name as a member.
-goTo.marker("4");
-verify.referencesCountIs(2);
+verify.referencesOf(fooStaticBar, [fooStaticBar, staticBar]);
diff --git a/tests/cases/fourslash/referencesForStringLiteralPropertyNames.ts b/tests/cases/fourslash/referencesForStringLiteralPropertyNames.ts
index e2f61d9cab3..2db0325d324 100644
--- a/tests/cases/fourslash/referencesForStringLiteralPropertyNames.ts
+++ b/tests/cases/fourslash/referencesForStringLiteralPropertyNames.ts
@@ -1,16 +1,13 @@
 /// <reference path='fourslash.ts'/>
 
 ////class Foo {
-////    public /*1*/"ss": any;
+////    public "[|ss|]": any;
 ////}
 ////
 ////var x: Foo;
-////x.ss;
-////x[/*2*/"ss"];
-////x = { "ss": 0 };
-////x = { /*3*/ss: 0 };
+////x.[|ss|];
+////x["[|ss|]"];
+////x = { "[|ss|]": 0 };
+////x = { [|ss|]: 0 };
 
-test.markers().forEach((m) => {
-    goTo.position(m.position, m.fileName);
-    verify.referencesCountIs(5);
-});
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/referencesForStringLiteralPropertyNames2.ts b/tests/cases/fourslash/referencesForStringLiteralPropertyNames2.ts
index 67b956dcd02..275a2b2756c 100644
--- a/tests/cases/fourslash/referencesForStringLiteralPropertyNames2.ts
+++ b/tests/cases/fourslash/referencesForStringLiteralPropertyNames2.ts
@@ -1,15 +1,10 @@
 /// <reference path='fourslash.ts'/>
 
 ////class Foo {
-////    /*1*/"blah"() { return 0; }
+////    "[|blah|]"() { return 0; }
 ////}
 ////
 ////var x: Foo;
-////x./*2*/blah;
+////x.[|blah|];
 
-
-goTo.marker("1");
-verify.referencesCountIs(2);
-
-goTo.marker("2");
-verify.referencesCountIs(2);
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/referencesForStringLiteralPropertyNames3.ts b/tests/cases/fourslash/referencesForStringLiteralPropertyNames3.ts
index 3288aec9b92..55a067ae8c3 100644
--- a/tests/cases/fourslash/referencesForStringLiteralPropertyNames3.ts
+++ b/tests/cases/fourslash/referencesForStringLiteralPropertyNames3.ts
@@ -1,15 +1,11 @@
 /// <reference path='fourslash.ts'/>
 
 ////class Foo2 {
-////    get /*1*/"42"() { return 0; }
-////    set /*2*/42(n) { }
+////    get "[|42|]"() { return 0; }
+////    set [|42|](n) { }
 ////}
 ////
 ////var y: Foo2;
-////y[42];
+////y[[|42|]];
 
-goTo.marker("1");
-verify.referencesCountIs(3);
-
-goTo.marker("2");
-verify.referencesCountIs(3);
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/referencesForStringLiteralPropertyNames4.ts b/tests/cases/fourslash/referencesForStringLiteralPropertyNames4.ts
index 08d04188ee9..34cad8f11e8 100644
--- a/tests/cases/fourslash/referencesForStringLiteralPropertyNames4.ts
+++ b/tests/cases/fourslash/referencesForStringLiteralPropertyNames4.ts
@@ -4,5 +4,4 @@
 ////x["[|someProperty|]"] = 3;
 ////x./*1*/[|someProperty|] = 5;
 
-goTo.marker("1");
-test.ranges().forEach(r => verify.referencesAtPositionContains(r));
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/referencesForUnionProperties.ts b/tests/cases/fourslash/referencesForUnionProperties.ts
index d5f0a2fd516..07eebeb5f74 100644
--- a/tests/cases/fourslash/referencesForUnionProperties.ts
+++ b/tests/cases/fourslash/referencesForUnionProperties.ts
@@ -1,16 +1,16 @@
 /// <reference path='fourslash.ts'/>
 
 ////interface One {
-////    common: { /*1*/a: number; };
+////    common: { [|a|]: number; };
 ////}
 ////
 ////interface Base {
-////    /*2*/a: string;
+////    [|a|]: string;
 ////    b: string;
 ////}
 ////
 ////interface HasAOrB extends Base {
-////    /*3*/a: string;
+////    [|a|]: string;
 ////    b: string;
 ////}
 ////
@@ -20,16 +20,10 @@
 ////
 ////var x : One | Two;
 ////
-////x.common./*4*/a;
+////x.common.[|a|];
 
-goTo.marker("1");
-verify.referencesCountIs(2); // One.common.a, x.common.a
-
-goTo.marker("2");
-verify.referencesCountIs(3); // Base.a, HasAOrB.a, x.common.a
-
-goTo.marker("3");
-verify.referencesCountIs(3); // Base.a, HasAOrB.a, x.common.a
-
-goTo.marker("4");
-verify.referencesCountIs(4); // One.common.a, Base.a, HasAOrB.a, x.common.a
\ No newline at end of file
+const [one, base, hasAOrB, x] = test.ranges();
+verify.referencesOf(one, [one, x]);
+verify.referencesOf(base, [base, hasAOrB, x]);
+verify.referencesOf(hasAOrB, [base, hasAOrB, x]);
+verify.referencesOf(x, [one, base, hasAOrB, x]);
diff --git a/tests/cases/fourslash/referencesInComment.ts b/tests/cases/fourslash/referencesInComment.ts
index 7ae9fdec9d2..00f7ba26860 100644
--- a/tests/cases/fourslash/referencesInComment.ts
+++ b/tests/cases/fourslash/referencesInComment.ts
@@ -5,14 +5,6 @@
 ////class foo { }
 ////var bar = 0;
 
-goTo.marker("1");
-verify.referencesCountIs(0);
-
-goTo.marker("2");
-verify.referencesCountIs(0);
-
-goTo.marker("3");
-verify.referencesCountIs(0);
-
-goTo.marker("4");
-verify.referencesCountIs(0);
\ No newline at end of file
+for (const marker of test.markers()) {
+    verify.referencesCountIs(0);
+}
diff --git a/tests/cases/fourslash/renameImportAndExportInDiffFiles.ts b/tests/cases/fourslash/renameImportAndExportInDiffFiles.ts
index 7b098721196..e982d6a4c7b 100644
--- a/tests/cases/fourslash/renameImportAndExportInDiffFiles.ts
+++ b/tests/cases/fourslash/renameImportAndExportInDiffFiles.ts
@@ -1,18 +1,10 @@
 /// <reference path='fourslash.ts' />
 
 // @Filename: a.ts
-////export var /*1*/a;
+////export var [|a|];
 
 // @Filename: b.ts
-////import { /*2*/a } from './a';
-////export { /*3*/a };
+////import { [|a|] } from './a';
+////export { [|a|] };
 
-goTo.file("a.ts");
-goTo.marker("1");
-
-goTo.file("b.ts");
-goTo.marker("2");
-verify.referencesCountIs(3);
-
-goTo.marker("3");
-verify.referencesCountIs(3);
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/server/references01.ts b/tests/cases/fourslash/server/references01.ts
index 0ecbeb43de3..528f79de5b4 100644
--- a/tests/cases/fourslash/server/references01.ts
+++ b/tests/cases/fourslash/server/references01.ts
@@ -3,16 +3,13 @@
 // Global class reference.
 
 // @Filename: referencesForGlobals_1.ts
-////class /*2*/globalClass {
+////class [|globalClass|] {
 ////    public f() { }
 ////}
 
 // @Filename: referencesForGlobals_2.ts
 ///////<reference path="referencesForGlobals_1.ts" />
-////var c = /*1*/globalClass();
+////var c = [|globalClass|]();
 
-goTo.marker("1");
-verify.referencesCountIs(2);
-
-goTo.marker("2");
-verify.referencesCountIs(2);
\ No newline at end of file
+// Must reverse ranges so that referencesForGlobals_2 goes first -- otherwise referencesForGlobals_1 won't pick it up.
+verify.rangesReferenceEachOther(test.ranges().reverse());
diff --git a/tests/cases/fourslash/server/referencesInConfiguredProject.ts b/tests/cases/fourslash/server/referencesInConfiguredProject.ts
index 9a0d7095a93..109b5e36e4d 100644
--- a/tests/cases/fourslash/server/referencesInConfiguredProject.ts
+++ b/tests/cases/fourslash/server/referencesInConfiguredProject.ts
@@ -3,18 +3,14 @@
 // Global class reference.
 
 // @Filename: referencesForGlobals_1.ts
-////class /*2*/globalClass {
+////class [|globalClass|] {
 ////    public f() { }
 ////}
 
 // @Filename: referencesForGlobals_2.ts
-////var c = /*1*/globalClass();
+////var c = [|globalClass|]();
 
 // @Filename: tsconfig.json
 ////{ "files": ["referencesForGlobals_1.ts", "referencesForGlobals_2.ts"] }
 
-goTo.marker("1");
-verify.referencesCountIs(2);
-
-goTo.marker("2");
-verify.referencesCountIs(2);
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/shims-pp/getReferencesAtPosition.ts b/tests/cases/fourslash/shims-pp/getReferencesAtPosition.ts
index a25a6e1285f..cb829807602 100644
--- a/tests/cases/fourslash/shims-pp/getReferencesAtPosition.ts
+++ b/tests/cases/fourslash/shims-pp/getReferencesAtPosition.ts
@@ -7,7 +7,7 @@
 ////
 ////    }
 ////
-////    public /*1*/start(){
+////    public [|start|](){
 ////        return this;
 ////    }
 ////
@@ -20,10 +20,7 @@
 ////import Second = require("./findAllRefsOnDefinition-import");
 ////
 ////var second = new Second.Test()
-////second.start();
+////second.[|start|]();
 ////second.stop();
 
-goTo.file("findAllRefsOnDefinition-import.ts");
-goTo.marker("1");
-
-verify.referencesCountIs(2);
\ No newline at end of file
+verify.rangesReferenceEachOther();
diff --git a/tests/cases/fourslash/shims/getReferencesAtPosition.ts b/tests/cases/fourslash/shims/getReferencesAtPosition.ts
index a25a6e1285f..cb829807602 100644
--- a/tests/cases/fourslash/shims/getReferencesAtPosition.ts
+++ b/tests/cases/fourslash/shims/getReferencesAtPosition.ts
@@ -7,7 +7,7 @@
 ////
 ////    }
 ////
-////    public /*1*/start(){
+////    public [|start|](){
 ////        return this;
 ////    }
 ////
@@ -20,10 +20,7 @@
 ////import Second = require("./findAllRefsOnDefinition-import");
 ////
 ////var second = new Second.Test()
-////second.start();
+////second.[|start|]();
 ////second.stop();
 
-goTo.file("findAllRefsOnDefinition-import.ts");
-goTo.marker("1");
-
-verify.referencesCountIs(2);
\ No newline at end of file
+verify.rangesReferenceEachOther();

From 6366a6d6a3df47b15ce26809b52b0952d4f8c9a1 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Wed, 15 Jun 2016 09:28:28 -0700
Subject: [PATCH 305/332] Remove String, Number, and Boolean from
 TypeFlags.Falsy

---
 src/compiler/types.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/compiler/types.ts b/src/compiler/types.ts
index db34bb7c6e8..255f1dff0c8 100644
--- a/src/compiler/types.ts
+++ b/src/compiler/types.ts
@@ -2224,7 +2224,8 @@ namespace ts {
 
         /* @internal */
         Nullable = Undefined | Null,
-        Falsy = String | Number | Boolean | Void | Undefined | Null,
+        /* @internal */
+        Falsy = Void | Undefined | Null,       // TODO: Add false, 0, and ""
         /* @internal */
         Intrinsic = Any | String | Number | Boolean | ESSymbol | Void | Undefined | Null | Never,
         /* @internal */

From 28b241e6156ea11ed20ed3dda4eda354b04272d5 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Wed, 15 Jun 2016 09:28:45 -0700
Subject: [PATCH 306/332] Add regression test

---
 tests/cases/compiler/strictNullLogicalAndOr.ts | 15 +++++++++++++++
 1 file changed, 15 insertions(+)
 create mode 100644 tests/cases/compiler/strictNullLogicalAndOr.ts

diff --git a/tests/cases/compiler/strictNullLogicalAndOr.ts b/tests/cases/compiler/strictNullLogicalAndOr.ts
new file mode 100644
index 00000000000..68055f8b20b
--- /dev/null
+++ b/tests/cases/compiler/strictNullLogicalAndOr.ts
@@ -0,0 +1,15 @@
+// @strictNullChecks: true
+
+// Repro from #9113
+
+let sinOrCos = Math.random() < .5;
+let choice = sinOrCos && Math.sin || Math.cos;
+
+choice(Math.PI);
+
+function sq(n?: number): number {
+  const r = n !== undefined && n*n || 0;
+  return r;
+}
+
+sq(3);
\ No newline at end of file

From c9e5bcb27645ad092fded94f686eb2c30dde15a2 Mon Sep 17 00:00:00 2001
From: Anders Hejlsberg <andersh@microsoft.com>
Date: Wed, 15 Jun 2016 09:35:45 -0700
Subject: [PATCH 307/332] Accept new baselines

---
 .../logicalAndOperatorStrictMode.types        | 104 +++++++++---------
 .../reference/strictNullLogicalAndOr.js       |  26 +++++
 .../reference/strictNullLogicalAndOr.symbols  |  44 ++++++++
 .../reference/strictNullLogicalAndOr.types    |  57 ++++++++++
 4 files changed, 179 insertions(+), 52 deletions(-)
 create mode 100644 tests/baselines/reference/strictNullLogicalAndOr.js
 create mode 100644 tests/baselines/reference/strictNullLogicalAndOr.symbols
 create mode 100644 tests/baselines/reference/strictNullLogicalAndOr.types

diff --git a/tests/baselines/reference/logicalAndOperatorStrictMode.types b/tests/baselines/reference/logicalAndOperatorStrictMode.types
index ca225d4561a..a824af2f811 100644
--- a/tests/baselines/reference/logicalAndOperatorStrictMode.types
+++ b/tests/baselines/reference/logicalAndOperatorStrictMode.types
@@ -86,8 +86,8 @@ const a8 = a && z;
 >z : string | number | undefined
 
 const s1 = s && a;
->s1 : number[] | string
->s && a : number[] | string
+>s1 : number[]
+>s && a : number[]
 >s : string
 >a : number[]
 
@@ -98,32 +98,32 @@ const s2 = s && s;
 >s : string
 
 const s3 = s && x;
->s3 : number | string
->s && x : number | string
+>s3 : number
+>s && x : number
 >s : string
 >x : number
 
 const s4 = s && b;
->s4 : boolean | string
->s && b : boolean | string
+>s4 : boolean
+>s && b : boolean
 >s : string
 >b : boolean
 
 const s5 = s && v;
->s5 : void | string
->s && v : void | string
+>s5 : void
+>s && v : void
 >s : string
 >v : void
 
 const s6 = s && u;
->s6 : string | undefined
->s && u : string | undefined
+>s6 : undefined
+>s && u : undefined
 >s : string
 >u : undefined
 
 const s7 = s && n;
->s7 : string | null
->s && n : string | null
+>s7 : null
+>s && n : null
 >s : string
 >n : null
 
@@ -134,14 +134,14 @@ const s8 = s && z;
 >z : string | number | undefined
 
 const x1 = x && a;
->x1 : number[] | number
->x && a : number[] | number
+>x1 : number[]
+>x && a : number[]
 >x : number
 >a : number[]
 
 const x2 = x && s;
->x2 : string | number
->x && s : string | number
+>x2 : string
+>x && s : string
 >x : number
 >s : string
 
@@ -152,26 +152,26 @@ const x3 = x && x;
 >x : number
 
 const x4 = x && b;
->x4 : boolean | number
->x && b : boolean | number
+>x4 : boolean
+>x && b : boolean
 >x : number
 >b : boolean
 
 const x5 = x && v;
->x5 : void | number
->x && v : void | number
+>x5 : void
+>x && v : void
 >x : number
 >v : void
 
 const x6 = x && u;
->x6 : number | undefined
->x && u : number | undefined
+>x6 : undefined
+>x && u : undefined
 >x : number
 >u : undefined
 
 const x7 = x && n;
->x7 : number | null
->x && n : number | null
+>x7 : null
+>x && n : null
 >x : number
 >n : null
 
@@ -182,20 +182,20 @@ const x8 = x && z;
 >z : string | number | undefined
 
 const b1 = b && a;
->b1 : number[] | boolean
->b && a : number[] | boolean
+>b1 : number[]
+>b && a : number[]
 >b : boolean
 >a : number[]
 
 const b2 = b && s;
->b2 : string | boolean
->b && s : string | boolean
+>b2 : string
+>b && s : string
 >b : boolean
 >s : string
 
 const b3 = b && x;
->b3 : number | boolean
->b && x : number | boolean
+>b3 : number
+>b && x : number
 >b : boolean
 >x : number
 
@@ -206,26 +206,26 @@ const b4 = b && b;
 >b : boolean
 
 const b5 = b && v;
->b5 : void | boolean
->b && v : void | boolean
+>b5 : void
+>b && v : void
 >b : boolean
 >v : void
 
 const b6 = b && u;
->b6 : boolean | undefined
->b && u : boolean | undefined
+>b6 : undefined
+>b && u : undefined
 >b : boolean
 >u : undefined
 
 const b7 = b && n;
->b7 : boolean | null
->b && n : boolean | null
+>b7 : null
+>b && n : null
 >b : boolean
 >n : null
 
 const b8 = b && z;
->b8 : string | number | boolean | undefined
->b && z : string | number | boolean | undefined
+>b8 : string | number | undefined
+>b && z : string | number | undefined
 >b : boolean
 >z : string | number | undefined
 
@@ -374,44 +374,44 @@ const n8 = n && z;
 >z : string | number | undefined
 
 const z1 = z && a;
->z1 : number[] | string | number | undefined
->z && a : number[] | string | number | undefined
+>z1 : number[] | undefined
+>z && a : number[] | undefined
 >z : string | number | undefined
 >a : number[]
 
 const z2 = z && s;
->z2 : string | number | undefined
->z && s : string | number | undefined
+>z2 : string | undefined
+>z && s : string | undefined
 >z : string | number | undefined
 >s : string
 
 const z3 = z && x;
->z3 : number | string | undefined
->z && x : number | string | undefined
+>z3 : number | undefined
+>z && x : number | undefined
 >z : string | number | undefined
 >x : number
 
 const z4 = z && b;
->z4 : boolean | string | number | undefined
->z && b : boolean | string | number | undefined
+>z4 : boolean | undefined
+>z && b : boolean | undefined
 >z : string | number | undefined
 >b : boolean
 
 const z5 = z && v;
->z5 : void | string | number
->z && v : void | string | number
+>z5 : void
+>z && v : void
 >z : string | number | undefined
 >v : void
 
 const z6 = z && u;
->z6 : string | number | undefined
->z && u : string | number | undefined
+>z6 : undefined
+>z && u : undefined
 >z : string | number | undefined
 >u : undefined
 
 const z7 = z && n;
->z7 : string | number | null | undefined
->z && n : string | number | null | undefined
+>z7 : null | undefined
+>z && n : null | undefined
 >z : string | number | undefined
 >n : null
 
diff --git a/tests/baselines/reference/strictNullLogicalAndOr.js b/tests/baselines/reference/strictNullLogicalAndOr.js
new file mode 100644
index 00000000000..f4dafe334b5
--- /dev/null
+++ b/tests/baselines/reference/strictNullLogicalAndOr.js
@@ -0,0 +1,26 @@
+//// [strictNullLogicalAndOr.ts]
+
+// Repro from #9113
+
+let sinOrCos = Math.random() < .5;
+let choice = sinOrCos && Math.sin || Math.cos;
+
+choice(Math.PI);
+
+function sq(n?: number): number {
+  const r = n !== undefined && n*n || 0;
+  return r;
+}
+
+sq(3);
+
+//// [strictNullLogicalAndOr.js]
+// Repro from #9113
+var sinOrCos = Math.random() < .5;
+var choice = sinOrCos && Math.sin || Math.cos;
+choice(Math.PI);
+function sq(n) {
+    var r = n !== undefined && n * n || 0;
+    return r;
+}
+sq(3);
diff --git a/tests/baselines/reference/strictNullLogicalAndOr.symbols b/tests/baselines/reference/strictNullLogicalAndOr.symbols
new file mode 100644
index 00000000000..8bb0343b9c0
--- /dev/null
+++ b/tests/baselines/reference/strictNullLogicalAndOr.symbols
@@ -0,0 +1,44 @@
+=== tests/cases/compiler/strictNullLogicalAndOr.ts ===
+
+// Repro from #9113
+
+let sinOrCos = Math.random() < .5;
+>sinOrCos : Symbol(sinOrCos, Decl(strictNullLogicalAndOr.ts, 3, 3))
+>Math.random : Symbol(Math.random, Decl(lib.d.ts, --, --))
+>Math : Symbol(Math, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>random : Symbol(Math.random, Decl(lib.d.ts, --, --))
+
+let choice = sinOrCos && Math.sin || Math.cos;
+>choice : Symbol(choice, Decl(strictNullLogicalAndOr.ts, 4, 3))
+>sinOrCos : Symbol(sinOrCos, Decl(strictNullLogicalAndOr.ts, 3, 3))
+>Math.sin : Symbol(Math.sin, Decl(lib.d.ts, --, --))
+>Math : Symbol(Math, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>sin : Symbol(Math.sin, Decl(lib.d.ts, --, --))
+>Math.cos : Symbol(Math.cos, Decl(lib.d.ts, --, --))
+>Math : Symbol(Math, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>cos : Symbol(Math.cos, Decl(lib.d.ts, --, --))
+
+choice(Math.PI);
+>choice : Symbol(choice, Decl(strictNullLogicalAndOr.ts, 4, 3))
+>Math.PI : Symbol(Math.PI, Decl(lib.d.ts, --, --))
+>Math : Symbol(Math, Decl(lib.d.ts, --, --), Decl(lib.d.ts, --, --))
+>PI : Symbol(Math.PI, Decl(lib.d.ts, --, --))
+
+function sq(n?: number): number {
+>sq : Symbol(sq, Decl(strictNullLogicalAndOr.ts, 6, 16))
+>n : Symbol(n, Decl(strictNullLogicalAndOr.ts, 8, 12))
+
+  const r = n !== undefined && n*n || 0;
+>r : Symbol(r, Decl(strictNullLogicalAndOr.ts, 9, 7))
+>n : Symbol(n, Decl(strictNullLogicalAndOr.ts, 8, 12))
+>undefined : Symbol(undefined)
+>n : Symbol(n, Decl(strictNullLogicalAndOr.ts, 8, 12))
+>n : Symbol(n, Decl(strictNullLogicalAndOr.ts, 8, 12))
+
+  return r;
+>r : Symbol(r, Decl(strictNullLogicalAndOr.ts, 9, 7))
+}
+
+sq(3);
+>sq : Symbol(sq, Decl(strictNullLogicalAndOr.ts, 6, 16))
+
diff --git a/tests/baselines/reference/strictNullLogicalAndOr.types b/tests/baselines/reference/strictNullLogicalAndOr.types
new file mode 100644
index 00000000000..a11a7033fb6
--- /dev/null
+++ b/tests/baselines/reference/strictNullLogicalAndOr.types
@@ -0,0 +1,57 @@
+=== tests/cases/compiler/strictNullLogicalAndOr.ts ===
+
+// Repro from #9113
+
+let sinOrCos = Math.random() < .5;
+>sinOrCos : boolean
+>Math.random() < .5 : boolean
+>Math.random() : number
+>Math.random : () => number
+>Math : Math
+>random : () => number
+>.5 : number
+
+let choice = sinOrCos && Math.sin || Math.cos;
+>choice : (x: number) => number
+>sinOrCos && Math.sin || Math.cos : (x: number) => number
+>sinOrCos && Math.sin : (x: number) => number
+>sinOrCos : boolean
+>Math.sin : (x: number) => number
+>Math : Math
+>sin : (x: number) => number
+>Math.cos : (x: number) => number
+>Math : Math
+>cos : (x: number) => number
+
+choice(Math.PI);
+>choice(Math.PI) : number
+>choice : (x: number) => number
+>Math.PI : number
+>Math : Math
+>PI : number
+
+function sq(n?: number): number {
+>sq : (n?: number | undefined) => number
+>n : number | undefined
+
+  const r = n !== undefined && n*n || 0;
+>r : number
+>n !== undefined && n*n || 0 : number
+>n !== undefined && n*n : number
+>n !== undefined : boolean
+>n : number | undefined
+>undefined : undefined
+>n*n : number
+>n : number
+>n : number
+>0 : number
+
+  return r;
+>r : number
+}
+
+sq(3);
+>sq(3) : number
+>sq : (n?: number | undefined) => number
+>3 : number
+

From dd0411a2f35383a328f619d74335089d2188f883 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 15 Jun 2016 09:42:52 -0700
Subject: [PATCH 308/332] Allow property declarations in .js files

---
 src/compiler/diagnosticMessages.json          |  4 ---
 src/compiler/program.ts                       | 15 +++++++--
 .../getJavaScriptSemanticDiagnostics18.ts     | 33 +++++++++++++++----
 3 files changed, 40 insertions(+), 12 deletions(-)

diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
index b78c342481f..46f1db97625 100644
--- a/src/compiler/diagnosticMessages.json
+++ b/src/compiler/diagnosticMessages.json
@@ -2921,10 +2921,6 @@
         "category": "Error",
         "code": 8012
     },
-    "'property declarations' can only be used in a .ts file.": {
-        "category": "Error",
-        "code": 8014
-    },
     "'enum declarations' can only be used in a .ts file.": {
         "category": "Error",
         "code": 8015
diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 15afbe18265..111343e08ff 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -1601,8 +1601,19 @@ namespace ts {
                             }
                             break;
                         case SyntaxKind.PropertyDeclaration:
-                            diagnostics.push(createDiagnosticForNode(node, Diagnostics.property_declarations_can_only_be_used_in_a_ts_file));
-                            return true;
+                            const propertyDeclaration = <PropertyDeclaration>node;
+                            if (propertyDeclaration.modifiers) {
+                                for (const modifier of propertyDeclaration.modifiers) {
+                                    if (modifier.kind !== SyntaxKind.StaticKeyword) {
+                                        diagnostics.push(createDiagnosticForNode(modifier, Diagnostics._0_can_only_be_used_in_a_ts_file, tokenToString(modifier.kind)));
+                                        return true;
+                                    }
+                                }
+                            }
+                            if (checkTypeAnnotation((<PropertyDeclaration>node).type)) {
+                                return true;
+                            }
+                            break;
                         case SyntaxKind.EnumDeclaration:
                             diagnostics.push(createDiagnosticForNode(node, Diagnostics.enum_declarations_can_only_be_used_in_a_ts_file));
                             return true;
diff --git a/tests/cases/fourslash/getJavaScriptSemanticDiagnostics18.ts b/tests/cases/fourslash/getJavaScriptSemanticDiagnostics18.ts
index fdaafa9aa51..707d1537fc5 100644
--- a/tests/cases/fourslash/getJavaScriptSemanticDiagnostics18.ts
+++ b/tests/cases/fourslash/getJavaScriptSemanticDiagnostics18.ts
@@ -2,14 +2,35 @@
 
 // @allowJs: true
 // @Filename: a.js
-//// class C { v }
+////class C {
+////    x; // Regular property declaration allowed
+////    static y; // static allowed
+////    public z; // public not allowed
+////}
 
+goTo.file("a.js");
 verify.getSemanticDiagnostics(`[
   {
-    "message": "'property declarations' can only be used in a .ts file.",
-    "start": 10,
-    "length": 1,
+    "message": "\'public\' can only be used in a .ts file.",
+    "start": 93,
+    "length": 6,
     "category": "error",
-    "code": 8014
+    "code": 8009
   }
-]`);
\ No newline at end of file
+]`);
+
+// @Filename: b.js
+////class C {
+////    x: number; // Types not allowed
+////}
+
+goTo.file("b.js");
+verify.getSemanticDiagnostics(`[
+  {
+    "message": "'types' can only be used in a .ts file.",
+    "start": 17,
+    "length": 6,
+    "category": "error",
+    "code": 8010
+  }
+]`);

From 9b6472aec0efd2fbf7ed185d5f49a580c1ee45ed Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Wed, 15 Jun 2016 11:00:27 -0700
Subject: [PATCH 309/332] Remove old test

---
 .../jsFileCompilationPropertySyntaxOfClass.errors.txt    | 9 ---------
 .../compiler/jsFileCompilationPropertySyntaxOfClass.ts   | 3 ---
 2 files changed, 12 deletions(-)
 delete mode 100644 tests/baselines/reference/jsFileCompilationPropertySyntaxOfClass.errors.txt
 delete mode 100644 tests/cases/compiler/jsFileCompilationPropertySyntaxOfClass.ts

diff --git a/tests/baselines/reference/jsFileCompilationPropertySyntaxOfClass.errors.txt b/tests/baselines/reference/jsFileCompilationPropertySyntaxOfClass.errors.txt
deleted file mode 100644
index fd5ea666459..00000000000
--- a/tests/baselines/reference/jsFileCompilationPropertySyntaxOfClass.errors.txt
+++ /dev/null
@@ -1,9 +0,0 @@
-error TS5055: Cannot write file 'tests/cases/compiler/a.js' because it would overwrite input file.
-tests/cases/compiler/a.js(1,11): error TS8014: 'property declarations' can only be used in a .ts file.
-
-
-!!! error TS5055: Cannot write file 'tests/cases/compiler/a.js' because it would overwrite input file.
-==== tests/cases/compiler/a.js (1 errors) ====
-    class C { v }
-              ~
-!!! error TS8014: 'property declarations' can only be used in a .ts file.
\ No newline at end of file
diff --git a/tests/cases/compiler/jsFileCompilationPropertySyntaxOfClass.ts b/tests/cases/compiler/jsFileCompilationPropertySyntaxOfClass.ts
deleted file mode 100644
index 62a0058bcef..00000000000
--- a/tests/cases/compiler/jsFileCompilationPropertySyntaxOfClass.ts
+++ /dev/null
@@ -1,3 +0,0 @@
-// @allowJs: true
-// @filename: a.js
-class C { v }
\ No newline at end of file

From 95ddfc7efc788c14900dc20da03f2b805e495854 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Wed, 15 Jun 2016 11:38:28 -0700
Subject: [PATCH 310/332] Do not use Object.assing in test

---
 tests/cases/unittests/transpile.ts | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/tests/cases/unittests/transpile.ts b/tests/cases/unittests/transpile.ts
index c8025bfc0a2..6c88c2558fc 100644
--- a/tests/cases/unittests/transpile.ts
+++ b/tests/cases/unittests/transpile.ts
@@ -1,9 +1,5 @@
 /// <reference path="..\..\..\src\harness\harness.ts" />
 
-interface ObjectConstructor {
-    assign<T, U>(target: T, source: U): T & U;
-}
-
 namespace ts {
     describe("Transpile", () => {
 
@@ -102,7 +98,7 @@ namespace ts {
             test(input, {
                 expectedOutput: output,
                 options: {
-                    compilerOptions: Object.assign({ module: ModuleKind.CommonJS, newLine: NewLineKind.CarriageReturnLineFeed }, options),
+                    compilerOptions: extend(options, { module: ModuleKind.CommonJS, newLine: NewLineKind.CarriageReturnLineFeed }),
                     fileName: "input.js",
                     reportDiagnostics: true
                 }

From ce45ee797c919b914ce65f4e5ef1065696d04662 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Wed, 15 Jun 2016 12:23:00 -0700
Subject: [PATCH 311/332] Fix comment

---
 src/services/services.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/services/services.ts b/src/services/services.ts
index 19167a5f6e0..62a50db65ef 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -2001,7 +2001,7 @@ namespace ts {
         // so pass --noLib to avoid reporting a file not found error.
         options.noLib = true;
 
-        // Clear out other settings that would not be participate in transpiling this module
+        // Clear out other settings that would not be used in transpiling this module
         options.lib = undefined;
         options.types = undefined;
         options.noEmit = undefined;

From 550d91249b1c4c72b6b0eef1fa275794c75b9faa Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Wed, 15 Jun 2016 14:40:29 -0700
Subject: [PATCH 312/332] Refactor code to make if statements cheaper

---
 src/server/editorServices.ts | 7 ++-----
 src/server/session.ts        | 6 +++---
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 615e843dcac..346b2e00a10 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -475,10 +475,7 @@ namespace ts.server {
 
         isRoot(info: ScriptInfo) {
             if (this.languageServiceDiabled) {
-                if (!this.projectOptions) {
-                    return undefined;
-                }
-                return forEach(this.projectOptions.files, file => toPath(file, file, createGetCanonicalFileName(this.projectService.host.useCaseSensitiveFileNames)) === info.path);
+                return undefined;
             }
 
             return this.compilerService.host.roots.some(root => root === info);
@@ -1421,7 +1418,7 @@ namespace ts.server {
                     return errors;
                 }
                 else {
-                    if (this.exceedTotalNonTsFileSizeLimit(projectOptions.files) && projectOptions.compilerOptions && !projectOptions.compilerOptions.disableSizeLimit) {
+                    if (projectOptions.compilerOptions && !projectOptions.compilerOptions.disableSizeLimit && this.exceedTotalNonTsFileSizeLimit(projectOptions.files)) {
                         project.setProjectOptions(projectOptions);
                         if (project.languageServiceDiabled) {
                             return;
diff --git a/src/server/session.ts b/src/server/session.ts
index 75abd946515..65540082f60 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -443,7 +443,7 @@ namespace ts.server {
             const info = this.projectService.getScriptInfo(file);
             const projects = this.projectService.findReferencingProjects(info);
             const projectsWithLanguageServiceEnabeld = ts.filter(projects, p => !p.languageServiceDiabled);
-            if (projects.length === 0 || projectsWithLanguageServiceEnabeld.length === 0) {
+            if (projectsWithLanguageServiceEnabeld.length === 0) {
                 throw Errors.NoProject;
             }
 
@@ -526,7 +526,7 @@ namespace ts.server {
             const info = this.projectService.getScriptInfo(file);
             const projects = this.projectService.findReferencingProjects(info);
             const projectsWithLanguageServiceEnabeld = ts.filter(projects, p => !p.languageServiceDiabled);
-            if (projects.length === 0 || projectsWithLanguageServiceEnabeld.length === 0) {
+            if (projectsWithLanguageServiceEnabeld.length === 0) {
                 throw Errors.NoProject;
             }
 
@@ -904,7 +904,7 @@ namespace ts.server {
             const info = this.projectService.getScriptInfo(file);
             const projects = this.projectService.findReferencingProjects(info);
             const projectsWithLanguageServiceEnabeld = ts.filter(projects, p => !p.languageServiceDiabled);
-            if (projects.length === 0 || projectsWithLanguageServiceEnabeld.length === 0) {
+            if (projectsWithLanguageServiceEnabeld.length === 0) {
                 throw Errors.NoProject;
             }
 

From 478d76347b17c30104c766c0d73b229464d73eff Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Thu, 16 Jun 2016 02:16:47 -0700
Subject: [PATCH 313/332] ignore casing when converting a source file path to
 relative path

---
 src/compiler/utilities.ts | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index 31b464b81ce..f4b9592043e 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -2330,7 +2330,9 @@ namespace ts {
 
     export function getSourceFilePathInNewDir(sourceFile: SourceFile, host: EmitHost, newDirPath: string) {
         let sourceFilePath = getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
-        sourceFilePath = sourceFilePath.replace(host.getCommonSourceDirectory(), "");
+        const commonSourceDirectory = host.getCommonSourceDirectory();
+        const isSourceFileInCommonSourceDirectory = sourceFilePath.toLowerCase().indexOf(commonSourceDirectory.toLowerCase()) === 0;
+        sourceFilePath = isSourceFileInCommonSourceDirectory ? sourceFilePath.substring(commonSourceDirectory.length) : sourceFilePath;
         return combinePaths(newDirPath, sourceFilePath);
     }
 

From c721b5f981de8ca1bd6e7b71fb5f17d9368d996f Mon Sep 17 00:00:00 2001
From: Herrington Darkholme <nonamesheep1@gmail.com>
Date: Fri, 17 Jun 2016 01:19:34 +0800
Subject: [PATCH 314/332] add tests & add branches for module interface

---
 src/compiler/checker.ts                       | 35 ++++++++++++-------
 tests/cases/compiler/classExtendsInterface.ts | 23 +++++++++++-
 2 files changed, 44 insertions(+), 14 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index d5f89bee8bf..b0484fc890c 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -853,7 +853,7 @@ namespace ts {
             if (!result) {
                 if (nameNotFoundMessage) {
                     if (!checkAndReportErrorForMissingPrefix(errorLocation, name, nameArg) &&
-                       !checkAndReportErrorForExtendingInterface(errorLocation, name)) {
+                       !checkAndReportErrorForExtendingInterface(errorLocation)) {
                         error(errorLocation, nameNotFoundMessage, typeof nameArg === "string" ? nameArg : declarationNameToString(nameArg));
                     }
                 }
@@ -938,21 +938,30 @@ namespace ts {
         }
 
 
-        function checkAndReportErrorForExtendingInterface(errorLocation: Node, name: string): boolean {
-            if (!errorLocation || errorLocation.kind !== SyntaxKind.Identifier ||
-                !errorLocation.parent || !errorLocation.parent.parent ||
-                errorLocation.parent.parent.kind !== SyntaxKind.HeritageClause) {
+        function checkAndReportErrorForExtendingInterface(errorLocation: Node): boolean {
+            const container = getContainingClass(errorLocation);
+            const heritageClause = <HeritageClause>getAncestor(errorLocation, SyntaxKind.HeritageClause);
+            if (!container || !heritageClause || heritageClause.token !== SyntaxKind.ExtendsKeyword) {
                 return false;
             }
-            const heritageClause = <HeritageClause>errorLocation.parent.parent;
-            if (heritageClause.token !== SyntaxKind.ExtendsKeyword) {
-                return false;
+            if (errorLocation.kind === SyntaxKind.Identifier) {
+                const name = (<Identifier>errorLocation).text;
+                const interfaceOrModule = resolveName(
+                    errorLocation, name,
+                    SymbolFlags.Interface | SymbolFlags.HasExports,
+                    /*errorMessage*/ undefined, /*nameArg*/ undefined)
+                if (!interfaceOrModule) {
+                    return false;
+                }
+                if (interfaceOrModule.flags & SymbolFlags.Interface) {
+                    error(errorLocation, Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements, name);
+                    return true;
+                }
             }
-            const enclosingScope = heritageClause.parent.parent.locals;
-            if (enclosingScope && getSymbol(enclosingScope, name, SymbolFlags.Interface)) {
-                error(errorLocation, Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements, name);
-                return true;
+            else if (errorLocation.kind === SyntaxKind.PropertyAccessExpression) {
+                // todo
             }
+
             return false;
          }
 
@@ -10058,7 +10067,7 @@ namespace ts {
             }
             const prop = getPropertyOfType(apparentType, right.text);
             if (!prop) {
-                if (right.text) {
+                if (right.text && !checkAndReportErrorForExtendingInterface(node)) {
                     error(right, Diagnostics.Property_0_does_not_exist_on_type_1, declarationNameToString(right), typeToString(type.flags & TypeFlags.ThisType ? apparentType : type));
                 }
                 return unknownType;
diff --git a/tests/cases/compiler/classExtendsInterface.ts b/tests/cases/compiler/classExtendsInterface.ts
index 36f42167d1a..883680619ed 100644
--- a/tests/cases/compiler/classExtendsInterface.ts
+++ b/tests/cases/compiler/classExtendsInterface.ts
@@ -1,7 +1,28 @@
 interface Comparable {}
 class A extends Comparable {}
 class B implements Comparable {}
- 
+
 interface Comparable2<T> {}
 class A2<T> extends Comparable2<T> {}
 class B2<T> implements Comparable2<T> {}
+
+function Factory(a: any): {new()} {
+  return null
+}
+
+class C extends Factory(Comparable) {}
+
+module M {
+  export interface I1 {}
+  export interface I2<T> {}
+}
+class C1 extends M.I1 {}
+class C2<T> extends M.I2<T> {}
+
+namespace N {
+  export interface I1 {}
+  export interface I2<T> {}
+}
+
+class D1 extends N.I1 {}
+class D2<T> extends N.I2<T> {}

From 0e6f8eb2bca776acdb11a6cbf45b37b2d195650a Mon Sep 17 00:00:00 2001
From: Yui <yuit@users.noreply.github.com>
Date: Thu, 16 Jun 2016 10:50:01 -0700
Subject: [PATCH 315/332] Using baselines for transpile unittests (#9195)

* Conver to Transpile unittest to use baselines instead

* Add baselines

* Fix linting error
---
 ...ring as enum values for compile-options.js |   2 +
 .../Does not generate semantic diagnostics.js |   3 +
 ... expected syntactic diagnostics.errors.txt |   7 +
 ...enerates expected syntactic diagnostics.js |   4 +
 .../transpile/Generates module output.js      |   5 +
 ...diagnostics for missing file references.js |   4 +
 ... diagnostics for missing module imports.js |   2 +
 ...erates no diagnostics with valid inputs.js |   3 +
 ...extra errors for file without extension.js |   3 +
 .../transpile/Rename dependencies - AMD.js    |   5 +
 .../transpile/Rename dependencies - System.js |  15 +
 .../transpile/Rename dependencies - UMD.js    |  13 +
 ...r-options input is empty object.errors.txt |   6 +
 ... compiler-options input is empty object.js |   2 +
 ...r-options input is empty string.errors.txt |   6 +
 ... compiler-options input is empty string.js |   2 +
 ...ons module-kind is out-of-range.errors.txt |   6 +
 ...ler-options module-kind is out-of-range.js |   2 +
 ...s target-script is out-of-range.errors.txt |   6 +
 ...r-options target-script is out-of-range.js |   2 +
 .../reference/transpile/Sets module name.js   |  12 +
 .../Support options with lib values.js        |   3 +
 .../Support options with types values.js      |   3 +
 .../Supports backslashes in file name.js      |   3 +
 .../transpile/Supports urls in file name.js   |   3 +
 ... with emit decorators and emit metadata.js |  19 +
 .../Uses correct newLine character.js         |   3 +
 .../transpile/transpile .js files.js          |   3 +
 ...anspile file as tsx if jsx is specified.js |   3 +
 tests/cases/unittests/transpile.ts            | 527 +++++++-----------
 30 files changed, 362 insertions(+), 315 deletions(-)
 create mode 100644 tests/baselines/reference/transpile/Accepts string as enum values for compile-options.js
 create mode 100644 tests/baselines/reference/transpile/Does not generate semantic diagnostics.js
 create mode 100644 tests/baselines/reference/transpile/Generates expected syntactic diagnostics.errors.txt
 create mode 100644 tests/baselines/reference/transpile/Generates expected syntactic diagnostics.js
 create mode 100644 tests/baselines/reference/transpile/Generates module output.js
 create mode 100644 tests/baselines/reference/transpile/Generates no diagnostics for missing file references.js
 create mode 100644 tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.js
 create mode 100644 tests/baselines/reference/transpile/Generates no diagnostics with valid inputs.js
 create mode 100644 tests/baselines/reference/transpile/No extra errors for file without extension.js
 create mode 100644 tests/baselines/reference/transpile/Rename dependencies - AMD.js
 create mode 100644 tests/baselines/reference/transpile/Rename dependencies - System.js
 create mode 100644 tests/baselines/reference/transpile/Rename dependencies - UMD.js
 create mode 100644 tests/baselines/reference/transpile/Report an error when compiler-options input is empty object.errors.txt
 create mode 100644 tests/baselines/reference/transpile/Report an error when compiler-options input is empty object.js
 create mode 100644 tests/baselines/reference/transpile/Report an error when compiler-options input is empty string.errors.txt
 create mode 100644 tests/baselines/reference/transpile/Report an error when compiler-options input is empty string.js
 create mode 100644 tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.errors.txt
 create mode 100644 tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.js
 create mode 100644 tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.errors.txt
 create mode 100644 tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.js
 create mode 100644 tests/baselines/reference/transpile/Sets module name.js
 create mode 100644 tests/baselines/reference/transpile/Support options with lib values.js
 create mode 100644 tests/baselines/reference/transpile/Support options with types values.js
 create mode 100644 tests/baselines/reference/transpile/Supports backslashes in file name.js
 create mode 100644 tests/baselines/reference/transpile/Supports urls in file name.js
 create mode 100644 tests/baselines/reference/transpile/Transpile with emit decorators and emit metadata.js
 create mode 100644 tests/baselines/reference/transpile/Uses correct newLine character.js
 create mode 100644 tests/baselines/reference/transpile/transpile .js files.js
 create mode 100644 tests/baselines/reference/transpile/transpile file as tsx if jsx is specified.js

diff --git a/tests/baselines/reference/transpile/Accepts string as enum values for compile-options.js b/tests/baselines/reference/transpile/Accepts string as enum values for compile-options.js
new file mode 100644
index 00000000000..981e2e706cb
--- /dev/null
+++ b/tests/baselines/reference/transpile/Accepts string as enum values for compile-options.js	
@@ -0,0 +1,2 @@
+export const x = 0;
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Does not generate semantic diagnostics.js b/tests/baselines/reference/transpile/Does not generate semantic diagnostics.js
new file mode 100644
index 00000000000..61a703e13bb
--- /dev/null
+++ b/tests/baselines/reference/transpile/Does not generate semantic diagnostics.js	
@@ -0,0 +1,3 @@
+"use strict";
+var x = 0;
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.errors.txt b/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.errors.txt
new file mode 100644
index 00000000000..6fbdba6f2c6
--- /dev/null
+++ b/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.errors.txt	
@@ -0,0 +1,7 @@
+file.ts(1,3): error TS1005: ';' expected.
+
+
+==== file.ts (1 errors) ====
+    a b
+      ~
+!!! error TS1005: ';' expected.
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.js b/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.js
new file mode 100644
index 00000000000..9d108d63313
--- /dev/null
+++ b/tests/baselines/reference/transpile/Generates expected syntactic diagnostics.js	
@@ -0,0 +1,4 @@
+"use strict";
+a;
+b;
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Generates module output.js b/tests/baselines/reference/transpile/Generates module output.js
new file mode 100644
index 00000000000..9eadd1f2717
--- /dev/null
+++ b/tests/baselines/reference/transpile/Generates module output.js	
@@ -0,0 +1,5 @@
+define(["require", "exports"], function (require, exports) {
+    "use strict";
+    var x = 0;
+});
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Generates no diagnostics for missing file references.js b/tests/baselines/reference/transpile/Generates no diagnostics for missing file references.js
new file mode 100644
index 00000000000..88d98628eee
--- /dev/null
+++ b/tests/baselines/reference/transpile/Generates no diagnostics for missing file references.js	
@@ -0,0 +1,4 @@
+"use strict";
+/// <reference path="file2.ts" />
+var x = 0;
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.js b/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.js
new file mode 100644
index 00000000000..1ceb1bcd146
--- /dev/null
+++ b/tests/baselines/reference/transpile/Generates no diagnostics for missing module imports.js	
@@ -0,0 +1,2 @@
+"use strict";
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Generates no diagnostics with valid inputs.js b/tests/baselines/reference/transpile/Generates no diagnostics with valid inputs.js
new file mode 100644
index 00000000000..61a703e13bb
--- /dev/null
+++ b/tests/baselines/reference/transpile/Generates no diagnostics with valid inputs.js	
@@ -0,0 +1,3 @@
+"use strict";
+var x = 0;
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/No extra errors for file without extension.js b/tests/baselines/reference/transpile/No extra errors for file without extension.js
new file mode 100644
index 00000000000..61a703e13bb
--- /dev/null
+++ b/tests/baselines/reference/transpile/No extra errors for file without extension.js	
@@ -0,0 +1,3 @@
+"use strict";
+var x = 0;
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Rename dependencies - AMD.js b/tests/baselines/reference/transpile/Rename dependencies - AMD.js
new file mode 100644
index 00000000000..a0dd948c9fc
--- /dev/null
+++ b/tests/baselines/reference/transpile/Rename dependencies - AMD.js	
@@ -0,0 +1,5 @@
+define(["require", "exports", "SomeOtherName"], function (require, exports, SomeName_1) {
+    "use strict";
+    use(SomeName_1.foo);
+});
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Rename dependencies - System.js b/tests/baselines/reference/transpile/Rename dependencies - System.js
new file mode 100644
index 00000000000..8f3fcaa8559
--- /dev/null
+++ b/tests/baselines/reference/transpile/Rename dependencies - System.js	
@@ -0,0 +1,15 @@
+System.register(["SomeOtherName"], function(exports_1, context_1) {
+    "use strict";
+    var __moduleName = context_1 && context_1.id;
+    var SomeName_1;
+    return {
+        setters:[
+            function (SomeName_1_1) {
+                SomeName_1 = SomeName_1_1;
+            }],
+        execute: function() {
+            use(SomeName_1.foo);
+        }
+    }
+});
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Rename dependencies - UMD.js b/tests/baselines/reference/transpile/Rename dependencies - UMD.js
new file mode 100644
index 00000000000..94a7249678f
--- /dev/null
+++ b/tests/baselines/reference/transpile/Rename dependencies - UMD.js	
@@ -0,0 +1,13 @@
+(function (factory) {
+    if (typeof module === 'object' && typeof module.exports === 'object') {
+        var v = factory(require, exports); if (v !== undefined) module.exports = v;
+    }
+    else if (typeof define === 'function' && define.amd) {
+        define(["require", "exports", "SomeOtherName"], factory);
+    }
+})(function (require, exports) {
+    "use strict";
+    var SomeName_1 = require("SomeOtherName");
+    use(SomeName_1.foo);
+});
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Report an error when compiler-options input is empty object.errors.txt b/tests/baselines/reference/transpile/Report an error when compiler-options input is empty object.errors.txt
new file mode 100644
index 00000000000..d7d6eb69300
--- /dev/null
+++ b/tests/baselines/reference/transpile/Report an error when compiler-options input is empty object.errors.txt	
@@ -0,0 +1,6 @@
+error TS6046: Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'
+
+
+!!! error TS6046: Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'
+==== file.ts (0 errors) ====
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Report an error when compiler-options input is empty object.js b/tests/baselines/reference/transpile/Report an error when compiler-options input is empty object.js
new file mode 100644
index 00000000000..1ceb1bcd146
--- /dev/null
+++ b/tests/baselines/reference/transpile/Report an error when compiler-options input is empty object.js	
@@ -0,0 +1,2 @@
+"use strict";
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Report an error when compiler-options input is empty string.errors.txt b/tests/baselines/reference/transpile/Report an error when compiler-options input is empty string.errors.txt
new file mode 100644
index 00000000000..d7d6eb69300
--- /dev/null
+++ b/tests/baselines/reference/transpile/Report an error when compiler-options input is empty string.errors.txt	
@@ -0,0 +1,6 @@
+error TS6046: Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'
+
+
+!!! error TS6046: Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'
+==== file.ts (0 errors) ====
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Report an error when compiler-options input is empty string.js b/tests/baselines/reference/transpile/Report an error when compiler-options input is empty string.js
new file mode 100644
index 00000000000..1ceb1bcd146
--- /dev/null
+++ b/tests/baselines/reference/transpile/Report an error when compiler-options input is empty string.js	
@@ -0,0 +1,2 @@
+"use strict";
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.errors.txt b/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.errors.txt
new file mode 100644
index 00000000000..d7d6eb69300
--- /dev/null
+++ b/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.errors.txt	
@@ -0,0 +1,6 @@
+error TS6046: Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'
+
+
+!!! error TS6046: Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'
+==== file.ts (0 errors) ====
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.js b/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.js
new file mode 100644
index 00000000000..1ceb1bcd146
--- /dev/null
+++ b/tests/baselines/reference/transpile/Report an error when compiler-options module-kind is out-of-range.js	
@@ -0,0 +1,2 @@
+"use strict";
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.errors.txt b/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.errors.txt
new file mode 100644
index 00000000000..d7d6eb69300
--- /dev/null
+++ b/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.errors.txt	
@@ -0,0 +1,6 @@
+error TS6046: Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'
+
+
+!!! error TS6046: Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'
+==== file.ts (0 errors) ====
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.js b/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.js
new file mode 100644
index 00000000000..1ceb1bcd146
--- /dev/null
+++ b/tests/baselines/reference/transpile/Report an error when compiler-options target-script is out-of-range.js	
@@ -0,0 +1,2 @@
+"use strict";
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Sets module name.js b/tests/baselines/reference/transpile/Sets module name.js
new file mode 100644
index 00000000000..683266f8383
--- /dev/null
+++ b/tests/baselines/reference/transpile/Sets module name.js	
@@ -0,0 +1,12 @@
+System.register("NamedModule", [], function(exports_1, context_1) {
+    "use strict";
+    var __moduleName = context_1 && context_1.id;
+    var x;
+    return {
+        setters:[],
+        execute: function() {
+            var x = 1;
+        }
+    }
+});
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Support options with lib values.js b/tests/baselines/reference/transpile/Support options with lib values.js
new file mode 100644
index 00000000000..36c68f08b9f
--- /dev/null
+++ b/tests/baselines/reference/transpile/Support options with lib values.js	
@@ -0,0 +1,3 @@
+"use strict";
+var a = 10;
+//# sourceMappingURL=input.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Support options with types values.js b/tests/baselines/reference/transpile/Support options with types values.js
new file mode 100644
index 00000000000..36c68f08b9f
--- /dev/null
+++ b/tests/baselines/reference/transpile/Support options with types values.js	
@@ -0,0 +1,3 @@
+"use strict";
+var a = 10;
+//# sourceMappingURL=input.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports backslashes in file name.js b/tests/baselines/reference/transpile/Supports backslashes in file name.js
new file mode 100644
index 00000000000..942449753b0
--- /dev/null
+++ b/tests/baselines/reference/transpile/Supports backslashes in file name.js	
@@ -0,0 +1,3 @@
+"use strict";
+var x;
+//# sourceMappingURL=b.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Supports urls in file name.js b/tests/baselines/reference/transpile/Supports urls in file name.js
new file mode 100644
index 00000000000..3923d3c9a41
--- /dev/null
+++ b/tests/baselines/reference/transpile/Supports urls in file name.js	
@@ -0,0 +1,3 @@
+"use strict";
+var x;
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Transpile with emit decorators and emit metadata.js b/tests/baselines/reference/transpile/Transpile with emit decorators and emit metadata.js
new file mode 100644
index 00000000000..407ee216d58
--- /dev/null
+++ b/tests/baselines/reference/transpile/Transpile with emit decorators and emit metadata.js	
@@ -0,0 +1,19 @@
+"use strict";
+var db_1 = require('./db');
+function someDecorator(target) {
+    return target;
+}
+var MyClass = (function () {
+    function MyClass(db) {
+        this.db = db;
+        this.db.doSomething();
+    }
+    MyClass = __decorate([
+        someDecorator, 
+        __metadata('design:paramtypes', [(typeof (_a = typeof db_1.db !== 'undefined' && db_1.db) === 'function' && _a) || Object])
+    ], MyClass);
+    return MyClass;
+    var _a;
+}());
+exports.MyClass = MyClass;
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/Uses correct newLine character.js b/tests/baselines/reference/transpile/Uses correct newLine character.js
new file mode 100644
index 00000000000..bab9c3c4443
--- /dev/null
+++ b/tests/baselines/reference/transpile/Uses correct newLine character.js	
@@ -0,0 +1,3 @@
+"use strict";
+var x = 0;
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/transpile .js files.js b/tests/baselines/reference/transpile/transpile .js files.js
new file mode 100644
index 00000000000..c17099d84ba
--- /dev/null
+++ b/tests/baselines/reference/transpile/transpile .js files.js	
@@ -0,0 +1,3 @@
+"use strict";
+var a = 10;
+//# sourceMappingURL=input.js.map
\ No newline at end of file
diff --git a/tests/baselines/reference/transpile/transpile file as tsx if jsx is specified.js b/tests/baselines/reference/transpile/transpile file as tsx if jsx is specified.js
new file mode 100644
index 00000000000..baa27ee64ce
--- /dev/null
+++ b/tests/baselines/reference/transpile/transpile file as tsx if jsx is specified.js	
@@ -0,0 +1,3 @@
+"use strict";
+var x = React.createElement("div", null);
+//# sourceMappingURL=file.js.map
\ No newline at end of file
diff --git a/tests/cases/unittests/transpile.ts b/tests/cases/unittests/transpile.ts
index cac44994420..3f29002e6a2 100644
--- a/tests/cases/unittests/transpile.ts
+++ b/tests/cases/unittests/transpile.ts
@@ -5,346 +5,243 @@ namespace ts {
 
         interface TranspileTestSettings {
             options?: TranspileOptions;
-            expectedOutput?: string;
-            expectedDiagnosticCodes?: number[];
-            expectedDiagnosticTexts?: string[];
         }
 
-        function checkDiagnostics(diagnostics: Diagnostic[], expectedDiagnosticCodes: number[] = [], expectedDiagnosticTexts?: string[]) {
-            const n = expectedDiagnosticCodes.length;
-            if (expectedDiagnosticTexts) {
-                assert.equal(n, expectedDiagnosticTexts.length);
-            }
-            for (let i = 0; i < n; i++) {
-                assert.equal(expectedDiagnosticCodes[i], diagnostics[i] && diagnostics[i].code, `Could not find expected diagnostic.`);
-                if (expectedDiagnosticTexts) {
-                    assert.equal(expectedDiagnosticTexts[i], diagnostics[i] && diagnostics[i].messageText);
-                }
-            };
-            assert.equal(diagnostics.length, n, "Resuting diagnostics count does not match expected");
-        }
+        function transpilesCorrectly(name: string, input: string, testSettings: TranspileTestSettings) {
+            describe(name, () => {
+                let justName: string;
+                let transpileOptions: TranspileOptions;
+                let canUseOldTranspile: boolean;
+                let toBeCompiled: Harness.Compiler.TestFile[];
+                let transpileResult: TranspileOutput;
+                let oldTranspileResult: string;
+                let oldTranspileDiagnostics: Diagnostic[];
 
-        function test(input: string, testSettings: TranspileTestSettings): void {
+                before(() => {
+                    transpileOptions = testSettings.options || {};
+                    if (!transpileOptions.compilerOptions) {
+                        transpileOptions.compilerOptions = {};
+                    }
 
-            const transpileOptions: TranspileOptions = testSettings.options || {};
-            if (!transpileOptions.compilerOptions) {
-                transpileOptions.compilerOptions = {};
-            }
-            if (transpileOptions.compilerOptions.newLine === undefined) {
-                // use \r\n as default new line
-                transpileOptions.compilerOptions.newLine = ts.NewLineKind.CarriageReturnLineFeed;
-            }
+                    if (transpileOptions.compilerOptions.newLine === undefined) {
+                        // use \r\n as default new line
+                        transpileOptions.compilerOptions.newLine = ts.NewLineKind.CarriageReturnLineFeed;
+                    }
 
-            const canUseOldTranspile = !transpileOptions.renamedDependencies;
+                    transpileOptions.compilerOptions.sourceMap = true;
 
-            transpileOptions.reportDiagnostics = true;
-            const transpileModuleResult = transpileModule(input, transpileOptions);
+                    if (!transpileOptions.fileName) {
+                        transpileOptions.fileName = transpileOptions.compilerOptions.jsx ? "file.tsx" : "file.ts";
+                    }
 
-            checkDiagnostics(transpileModuleResult.diagnostics, testSettings.expectedDiagnosticCodes, testSettings.expectedDiagnosticTexts);
+                    transpileOptions.reportDiagnostics = true;
 
-            if (testSettings.expectedOutput !== undefined) {
-                assert.equal(transpileModuleResult.outputText, testSettings.expectedOutput);
-            }
+                    justName = "transpile/" + name.replace(/[^a-z0-9\-. ]/ig, "") + (transpileOptions.compilerOptions.jsx ? ".tsx" : ".ts");
+                    toBeCompiled = [{
+                        unitName: transpileOptions.fileName,
+                        content: input
+                    }];
 
-            if (canUseOldTranspile) {
-                const diagnostics: Diagnostic[] = [];
-                const transpileResult = transpile(input, transpileOptions.compilerOptions, transpileOptions.fileName, diagnostics, transpileOptions.moduleName);
-                checkDiagnostics(diagnostics, testSettings.expectedDiagnosticCodes, testSettings.expectedDiagnosticTexts);
-                if (testSettings.expectedOutput) {
-                    assert.equal(transpileResult, testSettings.expectedOutput);
-                }
-            }
+                    canUseOldTranspile = !transpileOptions.renamedDependencies;
+                    transpileResult = transpileModule(input, transpileOptions);
 
-            // check source maps
-            if (!transpileOptions.compilerOptions) {
-                transpileOptions.compilerOptions = {};
-            }
-
-            if (!transpileOptions.fileName) {
-                transpileOptions.fileName = transpileOptions.compilerOptions.jsx ? "file.tsx" : "file.ts";
-            }
-
-            transpileOptions.compilerOptions.sourceMap = true;
-            const transpileModuleResultWithSourceMap = transpileModule(input, transpileOptions);
-            assert.isTrue(transpileModuleResultWithSourceMap.sourceMapText !== undefined);
-
-            const expectedSourceMapFileName = removeFileExtension(getBaseFileName(normalizeSlashes(transpileOptions.fileName))) + ".js.map";
-            const expectedSourceMappingUrlLine = `//# sourceMappingURL=${expectedSourceMapFileName}`;
-
-            if (testSettings.expectedOutput !== undefined) {
-                assert.equal(transpileModuleResultWithSourceMap.outputText, testSettings.expectedOutput + expectedSourceMappingUrlLine);
-            }
-            else {
-                // expected output is not set, just verify that output text has sourceMappingURL as a last line
-                const output = transpileModuleResultWithSourceMap.outputText;
-                assert.isTrue(output.length >= expectedSourceMappingUrlLine.length);
-                if (output.length === expectedSourceMappingUrlLine.length) {
-                    assert.equal(output, expectedSourceMappingUrlLine);
-                }
-                else {
-                    const suffix = getNewLineCharacter(transpileOptions.compilerOptions) + expectedSourceMappingUrlLine;
-                    assert.isTrue(output.indexOf(suffix, output.length - suffix.length) !== -1);
-                }
-            }
-
-        }
-
-        it("Generates no diagnostics with valid inputs", () => {
-            // No errors
-            test(`var x = 0;`, { options: { compilerOptions: { module: ModuleKind.CommonJS } } });
-        });
-
-        it("Generates no diagnostics for missing file references", () => {
-            test(`/// <reference path="file2.ts" />
-var x = 0;`,
-                { options: { compilerOptions: { module: ModuleKind.CommonJS } } });
-        });
-
-        it("Generates no diagnostics for missing module imports", () => {
-            test(`import {a} from "module2";`,
-                { options: { compilerOptions: { module: ModuleKind.CommonJS } } });
-        });
-
-        it("Generates expected syntactic diagnostics", () => {
-            test(`a b`,
-                { options: { compilerOptions: { module: ModuleKind.CommonJS } }, expectedDiagnosticCodes: [1005] }); /// 1005: ';' Expected
-        });
-
-        it("Does not generate semantic diagnostics", () => {
-            test(`var x: string = 0;`,
-                { options: { compilerOptions: { module: ModuleKind.CommonJS } } });
-        });
-
-        it("Generates module output", () => {
-            test(`var x = 0;`,
-                {
-                    options: { compilerOptions: { module: ModuleKind.AMD } },
-                    expectedOutput: `define(["require", "exports"], function (require, exports) {\r\n    "use strict";\r\n    var x = 0;\r\n});\r\n`
+                    if (canUseOldTranspile) {
+                        oldTranspileDiagnostics = [];
+                        oldTranspileResult = transpile(input, transpileOptions.compilerOptions, transpileOptions.fileName, oldTranspileDiagnostics, transpileOptions.moduleName);
+                    }
                 });
-        });
 
-        it("Uses correct newLine character", () => {
-            test(`var x = 0;`,
-                {
-                    options: { compilerOptions: { module: ModuleKind.CommonJS, newLine: NewLineKind.LineFeed } },
-                    expectedOutput: `"use strict";\nvar x = 0;\n`
+                after(() => {
+                    justName = undefined;
+                    transpileOptions = undefined;
+                    canUseOldTranspile = undefined;
+                    toBeCompiled = undefined;
+                    transpileResult = undefined;
+                    oldTranspileResult = undefined;
+                    oldTranspileDiagnostics = undefined;
                 });
-        });
 
-        it("Sets module name", () => {
-            const output =
-                `System.register("NamedModule", [], function(exports_1, context_1) {\n` +
-                `    "use strict";\n` +
-                `    var __moduleName = context_1 && context_1.id;\n` +
-                `    var x;\n` +
-                `    return {\n` +
-                `        setters:[],\n` +
-                `        execute: function() {\n` +
-                `            var x = 1;\n` +
-                `        }\n` +
-                `    }\n` +
-                `});\n`;
-            test("var x = 1;",
-                {
-                    options: { compilerOptions: { module: ModuleKind.System, newLine: NewLineKind.LineFeed }, moduleName: "NamedModule" },
-                    expectedOutput: output
-                });
-        });
-
-        it("No extra errors for file without extension", () => {
-            test(`"use strict";\r\nvar x = 0;`, { options: { compilerOptions: { module: ModuleKind.CommonJS }, fileName: "file" } });
-        });
-
-        it("Rename dependencies - System", () => {
-            const input =
-                `import {foo} from "SomeName";\n` +
-                `declare function use(a: any);\n` +
-                `use(foo);`;
-            const output =
-                `System.register(["SomeOtherName"], function(exports_1, context_1) {\n` +
-                `    "use strict";\n` +
-                `    var __moduleName = context_1 && context_1.id;\n` +
-                `    var SomeName_1;\n` +
-                `    return {\n` +
-                `        setters:[\n` +
-                `            function (SomeName_1_1) {\n` +
-                `                SomeName_1 = SomeName_1_1;\n` +
-                `            }],\n` +
-                `        execute: function() {\n` +
-                `            use(SomeName_1.foo);\n` +
-                `        }\n` +
-                `    }\n` +
-                `});\n`;
-
-            test(input,
-                {
-                    options: { compilerOptions: { module: ModuleKind.System, newLine: NewLineKind.LineFeed }, renamedDependencies: { "SomeName": "SomeOtherName" } },
-                    expectedOutput: output
-                });
-        });
-
-        it("Rename dependencies - AMD", () => {
-            const input =
-                `import {foo} from "SomeName";\n` +
-                `declare function use(a: any);\n` +
-                `use(foo);`;
-            const output =
-                `define(["require", "exports", "SomeOtherName"], function (require, exports, SomeName_1) {\n` +
-                `    "use strict";\n` +
-                `    use(SomeName_1.foo);\n` +
-                `});\n`;
-
-            test(input,
-                {
-                    options: { compilerOptions: { module: ModuleKind.AMD, newLine: NewLineKind.LineFeed }, renamedDependencies: { "SomeName": "SomeOtherName" } },
-                    expectedOutput: output
-                });
-        });
-
-        it("Rename dependencies - UMD", () => {
-            const input =
-                `import {foo} from "SomeName";\n` +
-                `declare function use(a: any);\n` +
-                `use(foo);`;
-            const output =
-                `(function (factory) {\n` +
-                `    if (typeof module === 'object' && typeof module.exports === 'object') {\n` +
-                `        var v = factory(require, exports); if (v !== undefined) module.exports = v;\n` +
-                `    }\n` +
-                `    else if (typeof define === 'function' && define.amd) {\n` +
-                `        define(["require", "exports", "SomeOtherName"], factory);\n` +
-                `    }\n` +
-                `})(function (require, exports) {\n` +
-                `    "use strict";\n` +
-                `    var SomeName_1 = require("SomeOtherName");\n` +
-                `    use(SomeName_1.foo);\n` +
-                `});\n`;
-
-            test(input,
-                {
-                    options: { compilerOptions: { module: ModuleKind.UMD, newLine: NewLineKind.LineFeed }, renamedDependencies: { "SomeName": "SomeOtherName" } },
-                    expectedOutput: output
-                });
-        });
-
-        it("Transpile with emit decorators and emit metadata", () => {
-            const input =
-                `import {db} from './db';\n` +
-                `function someDecorator(target) {\n` +
-                `    return target;\n` +
-                `} \n` +
-                `@someDecorator\n` +
-                `class MyClass {\n` +
-                `    db: db;\n` +
-                `    constructor(db: db) {\n` +
-                `        this.db = db;\n` +
-                `        this.db.doSomething(); \n` +
-                `    }\n` +
-                `}\n` +
-                `export {MyClass}; \n`;
-            const output =
-                `"use strict";\n` +
-                `var db_1 = require(\'./db\');\n` +
-                `function someDecorator(target) {\n` +
-                `    return target;\n` +
-                `}\n` +
-                `var MyClass = (function () {\n` +
-                `    function MyClass(db) {\n` +
-                `        this.db = db;\n` +
-                `        this.db.doSomething();\n` +
-                `    }\n` +
-                `    MyClass = __decorate([\n` +
-                `        someDecorator, \n` +
-                `        __metadata(\'design:paramtypes\', [(typeof (_a = typeof db_1.db !== \'undefined\' && db_1.db) === \'function\' && _a) || Object])\n` +
-                `    ], MyClass);\n` +
-                `    return MyClass;\n` +
-                `    var _a;\n` +
-                `}());\n` +
-                `exports.MyClass = MyClass;\n`;
-
-            test(input,
-                {
-                    options: {
-                        compilerOptions: {
-                            module: ModuleKind.CommonJS,
-                            newLine: NewLineKind.LineFeed,
-                            noEmitHelpers: true,
-                            emitDecoratorMetadata: true,
-                            experimentalDecorators: true,
-                            target: ScriptTarget.ES5,
+                it("Correct errors for " + justName, () => {
+                    Harness.Baseline.runBaseline("Correct errors", justName.replace(/\.tsx?$/, ".errors.txt"), () => {
+                        if (transpileResult.diagnostics.length === 0) {
+                            /* tslint:disable:no-null-keyword */
+                            return null;
+                            /* tslint:enable:no-null-keyword */
                         }
-                    },
-                    expectedOutput: output
+
+                        return Harness.Compiler.getErrorBaseline(toBeCompiled, transpileResult.diagnostics);
+                    });
                 });
-        });
 
-        it("Supports backslashes in file name", () => {
-            test("var x", { expectedOutput: `"use strict";\r\nvar x;\r\n`, options: { fileName: "a\\b.ts" }});
-        });
+                if (canUseOldTranspile) {
+                    it("Correct errors (old transpile) for " + justName, () => {
+                        Harness.Baseline.runBaseline("Correct errors", justName.replace(/\.tsx?$/, ".oldTranspile.errors.txt"), () => {
+                            if (oldTranspileDiagnostics.length === 0) {
+                                /* tslint:disable:no-null-keyword */
+                                return null;
+                                /* tslint:enable:no-null-keyword */
+                            }
 
-        it("transpile file as 'tsx' if 'jsx' is specified", () => {
-            const input = `var x = <div/>`;
-            const output = `"use strict";\nvar x = React.createElement("div", null);\n`;
-            test(input, {
-                expectedOutput: output,
-                options: { compilerOptions: { jsx: JsxEmit.React, newLine: NewLineKind.LineFeed } }
-            });
-        });
+                            return Harness.Compiler.getErrorBaseline(toBeCompiled, oldTranspileDiagnostics);
+                        });
+                    });
+                }
 
-        it("transpile .js files", () => {
-            const input = "const a = 10;";
-            const output = `"use strict";\nvar a = 10;\n`;
-            test(input, {
-                expectedOutput: output,
-                options: { compilerOptions: { newLine: NewLineKind.LineFeed, module: ModuleKind.CommonJS }, fileName: "input.js", reportDiagnostics: true }
-            });
-        });
-
-        it("Supports urls in file name", () => {
-            test("var x", { expectedOutput: `"use strict";\r\nvar x;\r\n`, options: { fileName: "http://somewhere/directory//directory2/file.ts" } });
-        });
-
-        it("Support options with lib values", () => {
-            const input = "const a = 10;";
-            const output = `"use strict";\r\nvar a = 10;\r\n`;
-            test(input, {
-                expectedOutput: output,
-                options: { compilerOptions: { lib: ["es6", "dom"], module: ModuleKind.CommonJS }, fileName: "input.js", reportDiagnostics: true }
-            });
-        });
-
-        it("Support options with types values", () => {
-            const input = "const a = 10;";
-            const output = `"use strict";\r\nvar a = 10;\r\n`;
-            test(input, {
-                expectedOutput: output,
-                options: { compilerOptions: { types: ["jquery", "typescript"], module: ModuleKind.CommonJS }, fileName: "input.js", reportDiagnostics: true }
-            });
-        });
-
-        describe("String values for enums", () => {
-            it("Accepts strings instead of enum values", () => {
-                test(`export const x = 0`, {
-                    options: {
-                        compilerOptions: {
-                            module: <ModuleKind><any>"es6",
-                            // Capitalization and spaces ignored
-                            target: <ScriptTarget><any>" Es6 "
+                it("Correct output for " + justName, () => {
+                    Harness.Baseline.runBaseline("Correct output", justName.replace(/\.tsx?$/, ".js"), () => {
+                        if (transpileResult.outputText) {
+                            return transpileResult.outputText;
                         }
-                    },
-                    expectedOutput: "export const x = 0;\r\n"
+                        else {
+                            // This can happen if compiler recieve invalid compiler-options
+                            /* tslint:disable:no-null-keyword */
+                            return null;
+                            /* tslint:enable:no-null-keyword */
+                        }
+                    });
                 });
-            });
 
-            it("Fails on bad value", () => {
-                for (const value in [123, {}, ""]) {
-                    test(``, {
-                        options: { compilerOptions: { module: <ModuleKind><any>value } },
-                        expectedDiagnosticCodes: [6046],
-                        expectedDiagnosticTexts: ["Argument for '--module' option must be:  'none', 'commonjs', 'amd', 'system', 'umd', 'es6', 'es2015'"]
+
+                if (canUseOldTranspile) {
+                    it("Correct output (old transpile) for " + justName, () => {
+                        Harness.Baseline.runBaseline("Correct output", justName.replace(/\.tsx?$/, ".oldTranspile.js"), () => {
+                            return oldTranspileResult;
+                        });
                     });
                 }
             });
+        }
+
+        transpilesCorrectly("Generates no diagnostics with valid inputs", `var x = 0;`, {
+            options: { compilerOptions: { module: ModuleKind.CommonJS } }
+        });
+
+        transpilesCorrectly("Generates no diagnostics for missing file references", `/// <reference path="file2.ts" />
+var x = 0;`, {
+            options: { compilerOptions: { module: ModuleKind.CommonJS } }
+        });
+
+        transpilesCorrectly("Generates no diagnostics for missing module imports", `import {a} from "module2";`, {
+            options: { compilerOptions: { module: ModuleKind.CommonJS } }
+        });
+
+        transpilesCorrectly("Generates expected syntactic diagnostics", `a b`, {
+            options: { compilerOptions: { module: ModuleKind.CommonJS } }
+        });
+
+        transpilesCorrectly("Does not generate semantic diagnostics", `var x: string = 0;`, {
+            options: { compilerOptions: { module: ModuleKind.CommonJS } }
+        });
+
+        transpilesCorrectly("Generates module output", `var x = 0;`, {
+            options: { compilerOptions: { module: ModuleKind.AMD } }
+        });
+
+        transpilesCorrectly("Uses correct newLine character", `var x = 0;`, {
+            options: { compilerOptions: { module: ModuleKind.CommonJS, newLine: NewLineKind.LineFeed } }
+        });
+
+        transpilesCorrectly("Sets module name", "var x = 1;", {
+            options: { compilerOptions: { module: ModuleKind.System, newLine: NewLineKind.LineFeed }, moduleName: "NamedModule" }
+        });
+
+        transpilesCorrectly("No extra errors for file without extension", `"use strict";\r\nvar x = 0;`, {
+            options: { compilerOptions: { module: ModuleKind.CommonJS }, fileName: "file" }
+        });
+
+        transpilesCorrectly("Rename dependencies - System",
+            `import {foo} from "SomeName";\n` +
+            `declare function use(a: any);\n` +
+            `use(foo);`, {
+            options: { compilerOptions: { module: ModuleKind.System, newLine: NewLineKind.LineFeed }, renamedDependencies: { "SomeName": "SomeOtherName" } }
+        });
+
+        transpilesCorrectly("Rename dependencies - AMD",
+            `import {foo} from "SomeName";\n` +
+            `declare function use(a: any);\n` +
+            `use(foo);`, {
+            options: { compilerOptions: { module: ModuleKind.AMD, newLine: NewLineKind.LineFeed }, renamedDependencies: { "SomeName": "SomeOtherName" } }
+        });
+
+        transpilesCorrectly("Rename dependencies - UMD",
+            `import {foo} from "SomeName";\n` +
+            `declare function use(a: any);\n` +
+            `use(foo);`, {
+            options: { compilerOptions: { module: ModuleKind.UMD, newLine: NewLineKind.LineFeed }, renamedDependencies: { "SomeName": "SomeOtherName" } }
+        });
+
+        transpilesCorrectly("Transpile with emit decorators and emit metadata",
+            `import {db} from './db';\n` +
+            `function someDecorator(target) {\n` +
+            `    return target;\n` +
+            `} \n` +
+            `@someDecorator\n` +
+            `class MyClass {\n` +
+            `    db: db;\n` +
+            `    constructor(db: db) {\n` +
+            `        this.db = db;\n` +
+            `        this.db.doSomething(); \n` +
+            `    }\n` +
+            `}\n` +
+            `export {MyClass}; \n`, {
+            options: {
+                compilerOptions: {
+                    module: ModuleKind.CommonJS,
+                    newLine: NewLineKind.LineFeed,
+                    noEmitHelpers: true,
+                    emitDecoratorMetadata: true,
+                    experimentalDecorators: true,
+                    target: ScriptTarget.ES5,
+                }
+            }
+        });
+
+        transpilesCorrectly("Supports backslashes in file name", "var x", {
+            options: { fileName: "a\\b.ts" }
+        });
+
+        transpilesCorrectly("transpile file as 'tsx' if 'jsx' is specified", `var x = <div/>`, {
+            options: { compilerOptions: { jsx: JsxEmit.React, newLine: NewLineKind.LineFeed } }
+        });
+
+        transpilesCorrectly("transpile .js files", "const a = 10;", {
+            options: { compilerOptions: { newLine: NewLineKind.LineFeed, module: ModuleKind.CommonJS }, fileName: "input.js", reportDiagnostics: true }
+        });
+
+        transpilesCorrectly("Supports urls in file name", "var x", {
+            options: { fileName: "http://somewhere/directory//directory2/file.ts" }
+        });
+
+        transpilesCorrectly("Accepts string as enum values for compile-options", "export const x = 0", {
+            options: { compilerOptions: {
+                module: <ModuleKind><any>"es6",
+                 // Capitalization and spaces ignored
+                target: <ScriptTarget><any>" Es6 "
+            }}
+        });
+
+        transpilesCorrectly("Report an error when compiler-options module-kind is out-of-range", "", {
+            options: { compilerOptions: { module: <ModuleKind><any>123 }}
+        });
+
+        transpilesCorrectly("Report an error when compiler-options target-script is out-of-range", "", {
+            options: { compilerOptions: { module: <ModuleKind><any>123 }}
+        });
+
+        transpilesCorrectly("Report an error when compiler-options input is empty object", "", {
+            options: { compilerOptions: { module: <ModuleKind><any>{} }}
+        });
+
+        transpilesCorrectly("Report an error when compiler-options input is empty string", "", {
+            options: { compilerOptions: { module: <ModuleKind><any>"" }}
+        });
+
+        transpilesCorrectly("Support options with lib values", "const a = 10;", {
+            options: { compilerOptions: { lib: ["es6", "dom"], module: ModuleKind.CommonJS }, fileName: "input.js", reportDiagnostics: true }
+        });
+
+        transpilesCorrectly("Support options with types values", "const a = 10;", {
+            options: { compilerOptions: { types: ["jquery", "typescript"], module: ModuleKind.CommonJS }, fileName: "input.js", reportDiagnostics: true }
         });
     });
 }

From 38962eea82f9bbb07c9657d0b7e2bb64d292c1a6 Mon Sep 17 00:00:00 2001
From: Herrington Darkholme <nonamesheep1@gmail.com>
Date: Fri, 17 Jun 2016 10:22:56 +0800
Subject: [PATCH 316/332] use resolveEntityName to find interface

---
 src/compiler/checker.ts | 35 ++++++++++++++++-------------------
 1 file changed, 16 insertions(+), 19 deletions(-)

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index b0484fc890c..6081770f62e 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -939,29 +939,26 @@ namespace ts {
 
 
         function checkAndReportErrorForExtendingInterface(errorLocation: Node): boolean {
-            const container = getContainingClass(errorLocation);
-            const heritageClause = <HeritageClause>getAncestor(errorLocation, SyntaxKind.HeritageClause);
-            if (!container || !heritageClause || heritageClause.token !== SyntaxKind.ExtendsKeyword) {
+            let parentClassExpression = errorLocation;
+            while (parentClassExpression) {
+                const kind = parentClassExpression.kind;
+                if (kind === SyntaxKind.Identifier || kind === SyntaxKind.PropertyAccessExpression) {
+                    parentClassExpression = parentClassExpression.parent;
+                    continue;
+                }
+                if (kind === SyntaxKind.ExpressionWithTypeArguments) {
+                    break;
+                }
                 return false;
             }
-            if (errorLocation.kind === SyntaxKind.Identifier) {
-                const name = (<Identifier>errorLocation).text;
-                const interfaceOrModule = resolveName(
-                    errorLocation, name,
-                    SymbolFlags.Interface | SymbolFlags.HasExports,
-                    /*errorMessage*/ undefined, /*nameArg*/ undefined)
-                if (!interfaceOrModule) {
-                    return false;
-                }
-                if (interfaceOrModule.flags & SymbolFlags.Interface) {
-                    error(errorLocation, Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements, name);
-                    return true;
-                }
+            if (!parentClassExpression) {
+                return false;
             }
-            else if (errorLocation.kind === SyntaxKind.PropertyAccessExpression) {
-                // todo
+            const expression = (<ExpressionWithTypeArguments>parentClassExpression).expression;
+            if (resolveEntityName(expression, SymbolFlags.Interface, true)) {
+                error(errorLocation, Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements, getTextOfNode(expression));
+                return true;
             }
-
             return false;
          }
 

From 877977a4509bf9e2f2cec89108d389919975afe0 Mon Sep 17 00:00:00 2001
From: Herrington Darkholme <nonamesheep1@gmail.com>
Date: Fri, 17 Jun 2016 11:07:18 +0800
Subject: [PATCH 317/332] add new tests for extends interface

---
 src/compiler/checker.ts                       |  2 +-
 .../classExtendsInterface.errors.txt          |  2 +-
 .../reference/classExtendsInterface.js        |  2 +-
 ...assExtendsInterfaceInExpression.errors.txt | 14 ++++++
 .../classExtendsInterfaceInExpression.js      | 26 +++++++++++
 .../classExtendsInterfaceInModule.errors.txt  | 27 ++++++++++++
 .../classExtendsInterfaceInModule.js          | 44 +++++++++++++++++++
 tests/cases/compiler/classExtendsInterface.ts | 21 ---------
 .../classExtendsInterfaceInExpression.ts      |  7 +++
 .../compiler/classExtendsInterfaceInModule.ts | 14 ++++++
 10 files changed, 135 insertions(+), 24 deletions(-)
 create mode 100644 tests/baselines/reference/classExtendsInterfaceInExpression.errors.txt
 create mode 100644 tests/baselines/reference/classExtendsInterfaceInExpression.js
 create mode 100644 tests/baselines/reference/classExtendsInterfaceInModule.errors.txt
 create mode 100644 tests/baselines/reference/classExtendsInterfaceInModule.js
 create mode 100644 tests/cases/compiler/classExtendsInterfaceInExpression.ts
 create mode 100644 tests/cases/compiler/classExtendsInterfaceInModule.ts

diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
index 6081770f62e..0cd9144e4be 100644
--- a/src/compiler/checker.ts
+++ b/src/compiler/checker.ts
@@ -955,7 +955,7 @@ namespace ts {
                 return false;
             }
             const expression = (<ExpressionWithTypeArguments>parentClassExpression).expression;
-            if (resolveEntityName(expression, SymbolFlags.Interface, true)) {
+            if (resolveEntityName(expression, SymbolFlags.Interface, /*ignoreErrors*/ true)) {
                 error(errorLocation, Diagnostics.Cannot_extend_an_interface_0_Did_you_mean_implements, getTextOfNode(expression));
                 return true;
             }
diff --git a/tests/baselines/reference/classExtendsInterface.errors.txt b/tests/baselines/reference/classExtendsInterface.errors.txt
index 3714bbb2323..72b8466105c 100644
--- a/tests/baselines/reference/classExtendsInterface.errors.txt
+++ b/tests/baselines/reference/classExtendsInterface.errors.txt
@@ -8,7 +8,7 @@ tests/cases/compiler/classExtendsInterface.ts(6,21): error TS2689: Cannot extend
                     ~~~~~~~~~~
 !!! error TS2689: Cannot extend an interface 'Comparable'. Did you mean 'implements'?
     class B implements Comparable {}
-     
+    
     interface Comparable2<T> {}
     class A2<T> extends Comparable2<T> {}
                         ~~~~~~~~~~~
diff --git a/tests/baselines/reference/classExtendsInterface.js b/tests/baselines/reference/classExtendsInterface.js
index c06c4e66d8b..b324f7382d8 100644
--- a/tests/baselines/reference/classExtendsInterface.js
+++ b/tests/baselines/reference/classExtendsInterface.js
@@ -2,7 +2,7 @@
 interface Comparable {}
 class A extends Comparable {}
 class B implements Comparable {}
- 
+
 interface Comparable2<T> {}
 class A2<T> extends Comparable2<T> {}
 class B2<T> implements Comparable2<T> {}
diff --git a/tests/baselines/reference/classExtendsInterfaceInExpression.errors.txt b/tests/baselines/reference/classExtendsInterfaceInExpression.errors.txt
new file mode 100644
index 00000000000..a2f6e1f4b6c
--- /dev/null
+++ b/tests/baselines/reference/classExtendsInterfaceInExpression.errors.txt
@@ -0,0 +1,14 @@
+tests/cases/compiler/classExtendsInterfaceInExpression.ts(7,25): error TS2304: Cannot find name 'A'.
+
+
+==== tests/cases/compiler/classExtendsInterfaceInExpression.ts (1 errors) ====
+    interface A {}
+    
+    function factory(a: any): {new(): Object} {
+      return null
+    }
+    
+    class C extends factory(A) {}
+                            ~
+!!! error TS2304: Cannot find name 'A'.
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/classExtendsInterfaceInExpression.js b/tests/baselines/reference/classExtendsInterfaceInExpression.js
new file mode 100644
index 00000000000..1b4fa112cc8
--- /dev/null
+++ b/tests/baselines/reference/classExtendsInterfaceInExpression.js
@@ -0,0 +1,26 @@
+//// [classExtendsInterfaceInExpression.ts]
+interface A {}
+
+function factory(a: any): {new(): Object} {
+  return null
+}
+
+class C extends factory(A) {}
+
+
+//// [classExtendsInterfaceInExpression.js]
+var __extends = (this && this.__extends) || function (d, b) {
+    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+};
+function factory(a) {
+    return null;
+}
+var C = (function (_super) {
+    __extends(C, _super);
+    function C() {
+        _super.apply(this, arguments);
+    }
+    return C;
+}(factory(A)));
diff --git a/tests/baselines/reference/classExtendsInterfaceInModule.errors.txt b/tests/baselines/reference/classExtendsInterfaceInModule.errors.txt
new file mode 100644
index 00000000000..9a87ddf51b6
--- /dev/null
+++ b/tests/baselines/reference/classExtendsInterfaceInModule.errors.txt
@@ -0,0 +1,27 @@
+tests/cases/compiler/classExtendsInterfaceInModule.ts(5,18): error TS2689: Cannot extend an interface 'M.I1'. Did you mean 'implements'?
+tests/cases/compiler/classExtendsInterfaceInModule.ts(6,21): error TS2689: Cannot extend an interface 'M.I2'. Did you mean 'implements'?
+tests/cases/compiler/classExtendsInterfaceInModule.ts(14,17): error TS2689: Cannot extend an interface 'Mod.Nested.I'. Did you mean 'implements'?
+
+
+==== tests/cases/compiler/classExtendsInterfaceInModule.ts (3 errors) ====
+    module M {
+      export interface I1 {}
+      export interface I2<T> {}
+    }
+    class C1 extends M.I1 {}
+                     ~
+!!! error TS2689: Cannot extend an interface 'M.I1'. Did you mean 'implements'?
+    class C2<T> extends M.I2<T> {}
+                        ~
+!!! error TS2689: Cannot extend an interface 'M.I2'. Did you mean 'implements'?
+    
+    module Mod {
+    	export namespace Nested {
+    		export interface I {}
+    	}
+    }
+    
+    class D extends Mod.Nested.I {}
+                    ~~~
+!!! error TS2689: Cannot extend an interface 'Mod.Nested.I'. Did you mean 'implements'?
+    
\ No newline at end of file
diff --git a/tests/baselines/reference/classExtendsInterfaceInModule.js b/tests/baselines/reference/classExtendsInterfaceInModule.js
new file mode 100644
index 00000000000..45415488700
--- /dev/null
+++ b/tests/baselines/reference/classExtendsInterfaceInModule.js
@@ -0,0 +1,44 @@
+//// [classExtendsInterfaceInModule.ts]
+module M {
+  export interface I1 {}
+  export interface I2<T> {}
+}
+class C1 extends M.I1 {}
+class C2<T> extends M.I2<T> {}
+
+module Mod {
+	export namespace Nested {
+		export interface I {}
+	}
+}
+
+class D extends Mod.Nested.I {}
+
+
+//// [classExtendsInterfaceInModule.js]
+var __extends = (this && this.__extends) || function (d, b) {
+    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
+    function __() { this.constructor = d; }
+    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
+};
+var C1 = (function (_super) {
+    __extends(C1, _super);
+    function C1() {
+        _super.apply(this, arguments);
+    }
+    return C1;
+}(M.I1));
+var C2 = (function (_super) {
+    __extends(C2, _super);
+    function C2() {
+        _super.apply(this, arguments);
+    }
+    return C2;
+}(M.I2));
+var D = (function (_super) {
+    __extends(D, _super);
+    function D() {
+        _super.apply(this, arguments);
+    }
+    return D;
+}(Mod.Nested.I));
diff --git a/tests/cases/compiler/classExtendsInterface.ts b/tests/cases/compiler/classExtendsInterface.ts
index 883680619ed..eaab1d60fc4 100644
--- a/tests/cases/compiler/classExtendsInterface.ts
+++ b/tests/cases/compiler/classExtendsInterface.ts
@@ -5,24 +5,3 @@ class B implements Comparable {}
 interface Comparable2<T> {}
 class A2<T> extends Comparable2<T> {}
 class B2<T> implements Comparable2<T> {}
-
-function Factory(a: any): {new()} {
-  return null
-}
-
-class C extends Factory(Comparable) {}
-
-module M {
-  export interface I1 {}
-  export interface I2<T> {}
-}
-class C1 extends M.I1 {}
-class C2<T> extends M.I2<T> {}
-
-namespace N {
-  export interface I1 {}
-  export interface I2<T> {}
-}
-
-class D1 extends N.I1 {}
-class D2<T> extends N.I2<T> {}
diff --git a/tests/cases/compiler/classExtendsInterfaceInExpression.ts b/tests/cases/compiler/classExtendsInterfaceInExpression.ts
new file mode 100644
index 00000000000..4dce2ae59bd
--- /dev/null
+++ b/tests/cases/compiler/classExtendsInterfaceInExpression.ts
@@ -0,0 +1,7 @@
+interface A {}
+
+function factory(a: any): {new(): Object} {
+  return null
+}
+
+class C extends factory(A) {}
diff --git a/tests/cases/compiler/classExtendsInterfaceInModule.ts b/tests/cases/compiler/classExtendsInterfaceInModule.ts
new file mode 100644
index 00000000000..4ea24e5dd7d
--- /dev/null
+++ b/tests/cases/compiler/classExtendsInterfaceInModule.ts
@@ -0,0 +1,14 @@
+module M {
+  export interface I1 {}
+  export interface I2<T> {}
+}
+class C1 extends M.I1 {}
+class C2<T> extends M.I2<T> {}
+
+module Mod {
+	export namespace Nested {
+		export interface I {}
+	}
+}
+
+class D extends Mod.Nested.I {}

From 2a9636b1beb87581536af331c90c343d821b76bc Mon Sep 17 00:00:00 2001
From: Herrington Darkholme <nonamesheep1@gmail.com>
Date: Fri, 17 Jun 2016 11:20:00 +0800
Subject: [PATCH 318/332] address code style

---
 .../reference/classExtendsInterfaceInExpression.errors.txt      | 2 +-
 tests/baselines/reference/classExtendsInterfaceInExpression.js  | 2 +-
 tests/cases/compiler/classExtendsInterfaceInExpression.ts       | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/tests/baselines/reference/classExtendsInterfaceInExpression.errors.txt b/tests/baselines/reference/classExtendsInterfaceInExpression.errors.txt
index a2f6e1f4b6c..64b160ea766 100644
--- a/tests/baselines/reference/classExtendsInterfaceInExpression.errors.txt
+++ b/tests/baselines/reference/classExtendsInterfaceInExpression.errors.txt
@@ -5,7 +5,7 @@ tests/cases/compiler/classExtendsInterfaceInExpression.ts(7,25): error TS2304: C
     interface A {}
     
     function factory(a: any): {new(): Object} {
-      return null
+      return null;
     }
     
     class C extends factory(A) {}
diff --git a/tests/baselines/reference/classExtendsInterfaceInExpression.js b/tests/baselines/reference/classExtendsInterfaceInExpression.js
index 1b4fa112cc8..69e63f92570 100644
--- a/tests/baselines/reference/classExtendsInterfaceInExpression.js
+++ b/tests/baselines/reference/classExtendsInterfaceInExpression.js
@@ -2,7 +2,7 @@
 interface A {}
 
 function factory(a: any): {new(): Object} {
-  return null
+  return null;
 }
 
 class C extends factory(A) {}
diff --git a/tests/cases/compiler/classExtendsInterfaceInExpression.ts b/tests/cases/compiler/classExtendsInterfaceInExpression.ts
index 4dce2ae59bd..002631afedf 100644
--- a/tests/cases/compiler/classExtendsInterfaceInExpression.ts
+++ b/tests/cases/compiler/classExtendsInterfaceInExpression.ts
@@ -1,7 +1,7 @@
 interface A {}
 
 function factory(a: any): {new(): Object} {
-  return null
+  return null;
 }
 
 class C extends factory(A) {}

From 166bc49f0c666f5a2a75bcfacd421e6b8f5135c7 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Thu, 16 Jun 2016 13:20:12 -0700
Subject: [PATCH 319/332] Refactor navigation bar

---
 src/compiler/core.ts                          |   11 +
 src/compiler/parser.ts                        |    8 +-
 src/server/client.ts                          |   17 +-
 src/server/editorServices.ts                  |   14 +-
 src/server/session.ts                         |   10 +-
 src/services/navigationBar.ts                 | 1374 +++++++----------
 src/services/services.ts                      |    2 +-
 .../navbar_contains-no-duplicates.ts          |   14 +-
 tests/cases/fourslash/navbar_exportDefault.ts |   16 +-
 ...BarAnonymousClassAndFunctionExpressions.ts |  147 ++
 ...arAnonymousClassAndFunctionExpressions2.ts |   64 +
 .../fourslash/navigationBarGetterAndSetter.ts |   48 +
 tests/cases/fourslash/navigationBarImports.ts |   30 +
 .../fourslash/navigationBarItemsFunctions.ts  |   14 +
 .../navigationBarItemsFunctionsBroken.ts      |    6 +
 .../navigationBarItemsFunctionsBroken2.ts     |   10 +
 ...ionBarItemsInsideMethodsAndConstructors.ts |   12 +-
 .../fourslash/navigationBarItemsItems2.ts     |    7 +-
 ...rItemsItemsContainsNoAnonymousFunctions.ts |   80 -
 .../navigationBarItemsMissingName1.ts         |    5 +
 .../navigationBarItemsMissingName2.ts         |   10 +-
 .../fourslash/navigationBarItemsModules.ts    |  196 +--
 ...ationBarItemsMultilineStringIdentifiers.ts |   56 +-
 tests/cases/fourslash/navigationBarJsDoc.ts   |   28 +-
 tests/cases/fourslash/navigationBarMerging.ts |  189 +++
 .../cases/fourslash/navigationBarVariables.ts |   53 +
 .../server/jsdocTypedefTagNavigateTo.ts       |   48 +-
 27 files changed, 1416 insertions(+), 1053 deletions(-)
 create mode 100644 tests/cases/fourslash/navigationBarAnonymousClassAndFunctionExpressions.ts
 create mode 100644 tests/cases/fourslash/navigationBarAnonymousClassAndFunctionExpressions2.ts
 create mode 100644 tests/cases/fourslash/navigationBarGetterAndSetter.ts
 create mode 100644 tests/cases/fourslash/navigationBarImports.ts
 delete mode 100644 tests/cases/fourslash/navigationBarItemsItemsContainsNoAnonymousFunctions.ts
 create mode 100644 tests/cases/fourslash/navigationBarMerging.ts
 create mode 100644 tests/cases/fourslash/navigationBarVariables.ts

diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index 8a2040a83df..10a0526d6ae 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -138,6 +138,17 @@ namespace ts {
         return result;
     }
 
+    export function filterMutate<T>(array: T[], f: (x: T) => boolean): void {
+        let outIndex = 0;
+        for (const item of array) {
+            if (f(item)) {
+                array[outIndex] = item;
+                outIndex++;
+            }
+        }
+        array.length = outIndex;
+    }
+
     export function map<T, U>(array: T[], f: (x: T) => U): U[] {
         let result: U[];
         if (array) {
diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index b2f3755ec46..6e0a37c3d9f 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -17,19 +17,19 @@ namespace ts {
     }
 
     function visitNode<T>(cbNode: (node: Node) => T, node: Node): T {
-        if (node) {
+        if (node !== void 0) {
             return cbNode(node);
         }
     }
 
     function visitNodeArray<T>(cbNodes: (nodes: Node[]) => T, nodes: Node[]) {
-        if (nodes) {
+        if (nodes !== void 0) {
             return cbNodes(nodes);
         }
     }
 
     function visitEachNode<T>(cbNode: (node: Node) => T, nodes: Node[]) {
-        if (nodes) {
+        if (nodes !== void 0) {
             for (const node of nodes) {
                 const result = cbNode(node);
                 if (result) {
@@ -44,7 +44,7 @@ namespace ts {
     // embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
     // a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
     export function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodeArray?: (nodes: Node[]) => T): T {
-        if (!node) {
+        if (node === void 0) {
             return;
         }
         // The visitXXX functions could be written as local functions that close over the cbNode and cbNodeArray
diff --git a/src/server/client.ts b/src/server/client.ts
index 864dac9fdaa..09cfa2ac739 100644
--- a/src/server/client.ts
+++ b/src/server/client.ts
@@ -45,8 +45,9 @@ namespace ts.server {
             return lineMap;
         }
 
-        private lineOffsetToPosition(fileName: string, lineOffset: protocol.Location): number {
-            return ts.computePositionOfLineAndCharacter(this.getLineMap(fileName), lineOffset.line - 1, lineOffset.offset - 1);
+        private lineOffsetToPosition(fileName: string, lineOffset: protocol.Location, lineMap?: number[]): number {
+            lineMap = lineMap || this.getLineMap(fileName);
+            return ts.computePositionOfLineAndCharacter(lineMap, lineOffset.line - 1, lineOffset.offset - 1);
         }
 
         private positionToOneBasedLineOffset(fileName: string, position: number): protocol.Location {
@@ -449,7 +450,7 @@ namespace ts.server {
             return this.lastRenameEntry.locations;
         }
 
-        decodeNavigationBarItems(items: protocol.NavigationBarItem[], fileName: string): NavigationBarItem[] {
+        decodeNavigationBarItems(items: protocol.NavigationBarItem[], fileName: string, lineMap: number[]): NavigationBarItem[] {
             if (!items) {
                 return [];
             }
@@ -458,8 +459,11 @@ namespace ts.server {
                 text: item.text,
                 kind: item.kind,
                 kindModifiers: item.kindModifiers || "",
-                spans: item.spans.map(span => createTextSpanFromBounds(this.lineOffsetToPosition(fileName, span.start), this.lineOffsetToPosition(fileName, span.end))),
-                childItems: this.decodeNavigationBarItems(item.childItems, fileName),
+                spans: item.spans.map(span =>
+                    createTextSpanFromBounds(
+                        this.lineOffsetToPosition(fileName, span.start, lineMap),
+                        this.lineOffsetToPosition(fileName, span.end, lineMap))),
+                childItems: this.decodeNavigationBarItems(item.childItems, fileName, lineMap),
                 indent: item.indent,
                 bolded: false,
                 grayed: false
@@ -474,7 +478,8 @@ namespace ts.server {
             const request = this.processRequest<protocol.NavBarRequest>(CommandNames.NavBar, args);
             const response = this.processResponse<protocol.NavBarResponse>(request);
 
-            return this.decodeNavigationBarItems(response.body, fileName);
+            const lineMap = this.getLineMap(fileName);
+            return this.decodeNavigationBarItems(response.body, fileName, lineMap);
         }
 
         getNameOrDottedNameSpan(fileName: string, startPos: number, endPos: number): TextSpan {
diff --git a/src/server/editorServices.ts b/src/server/editorServices.ts
index 346b2e00a10..74dbb7a0785 100644
--- a/src/server/editorServices.ts
+++ b/src/server/editorServices.ts
@@ -359,12 +359,16 @@ namespace ts.server {
          * @param line 1-based index
          * @param offset 1-based index
          */
-        positionToLineOffset(filename: string, position: number): ILineInfo {
+        positionToLineOffset(filename: string, position: number, lineIndex?:  LineIndex): ILineInfo {
+            lineIndex = lineIndex || this.getLineIndex(filename);
+            const lineOffset = lineIndex.charOffsetToLineNumberAndPos(position);
+            return { line: lineOffset.line, offset: lineOffset.offset + 1 };
+        }
+
+        getLineIndex(filename: string): LineIndex {
             const path = toPath(filename, this.host.getCurrentDirectory(), this.getCanonicalFileName);
             const script: ScriptInfo = this.filenameToScript.get(path);
-            const index = script.snap().index;
-            const lineOffset = index.charOffsetToLineNumberAndPos(position);
-            return { line: lineOffset.line, offset: lineOffset.offset + 1 };
+            return script.snap().index;
         }
     }
 
@@ -1452,7 +1456,7 @@ namespace ts.server {
                     }
 
                     // if the project is too large, the root files might not have been all loaded if the total
-                    // program size reached the upper limit. In that case project.projectOptions.files should 
+                    // program size reached the upper limit. In that case project.projectOptions.files should
                     // be more precise. However this would only happen for configured project.
                     const oldFileNames = project.projectOptions ? project.projectOptions.files : project.compilerService.host.roots.map(info => info.fileName);
                     const newFileNames = ts.filter(projectOptions.files, f => this.host.fileExists(f));
diff --git a/src/server/session.ts b/src/server/session.ts
index 65540082f60..aafc02a2b0b 100644
--- a/src/server/session.ts
+++ b/src/server/session.ts
@@ -863,7 +863,7 @@ namespace ts.server {
             this.projectService.closeClientFile(file);
         }
 
-        private decorateNavigationBarItem(project: Project, fileName: string, items: ts.NavigationBarItem[]): protocol.NavigationBarItem[] {
+        private decorateNavigationBarItem(project: Project, fileName: string, items: ts.NavigationBarItem[], lineIndex: LineIndex): protocol.NavigationBarItem[] {
             if (!items) {
                 return undefined;
             }
@@ -875,10 +875,10 @@ namespace ts.server {
                 kind: item.kind,
                 kindModifiers: item.kindModifiers,
                 spans: item.spans.map(span => ({
-                    start: compilerService.host.positionToLineOffset(fileName, span.start),
-                    end: compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(span))
+                    start: compilerService.host.positionToLineOffset(fileName, span.start, lineIndex),
+                    end: compilerService.host.positionToLineOffset(fileName, ts.textSpanEnd(span), lineIndex)
                 })),
-                childItems: this.decorateNavigationBarItem(project, fileName, item.childItems),
+                childItems: this.decorateNavigationBarItem(project, fileName, item.childItems, lineIndex),
                 indent: item.indent
             }));
         }
@@ -896,7 +896,7 @@ namespace ts.server {
                 return undefined;
             }
 
-            return this.decorateNavigationBarItem(project, fileName, items);
+            return this.decorateNavigationBarItem(project, fileName, items, compilerService.host.getLineIndex(fileName));
         }
 
         private getNavigateToItems(searchValue: string, fileName: string, maxResultCount?: number): protocol.NavtoItem[] {
diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index 59dc4a38283..e722f33bc70 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -2,860 +2,660 @@
 
 /* @internal */
 namespace ts.NavigationBar {
-    export function getNavigationBarItems(sourceFile: SourceFile, compilerOptions: CompilerOptions): ts.NavigationBarItem[]  {
-        // TODO: Handle JS files differently in 'navbar' calls for now, but ideally we should unify
-        // the 'navbar' and 'navto' logic for TypeScript and JavaScript.
-        if (isSourceFileJavaScript(sourceFile)) {
-            return getJsNavigationBarItems(sourceFile, compilerOptions);
+    /**
+     * Represents a navigation bar item and its children.
+     * The returned NavigationBarItem is more complicated and doesn't include 'parent', so we use these to do work before converting.
+     */
+    interface NavigationBarNode {
+        node: Node;
+        additionalNodes: Node[] | undefined;
+        parent: NavigationBarNode | undefined; // Present for all but root node
+        children: NavigationBarNode[] | undefined;
+        indent: number; // # of parents
+    }
+
+    export function getNavigationBarItems(sourceFile_: SourceFile): NavigationBarItem[] {
+        sourceFile = sourceFile_;
+        const result = map(topLevelItems(rootNavigationBarNode(sourceFile)), convertToTopLevelItem);
+        sourceFile = void 0;
+        return result;
+    }
+
+    // Keep sourceFile handy so we don't have to search for it every time we need to call `getText`.
+    let sourceFile: SourceFile;
+    function nodeText(node: Node): string {
+        return node.getText(sourceFile);
+    }
+
+    function navigationBarNodeKind(n: NavigationBarNode): SyntaxKind {
+        return n.node.kind;
+    }
+
+    function pushChild(parent: NavigationBarNode, child: NavigationBarNode): void {
+        if (parent.children !== void 0) {
+            parent.children.push(child);
+        }
+        else {
+            parent.children = [child];
+        }
+    }
+
+    /*
+    For performance, we keep navigation bar parents on a stack rather than passing them through each recursion.
+    `parent` is the current parent and is *not* stored in parentsStack.
+    `startNode` sets a new parent and `endNode` returns to the previous parent.
+    */
+    const parentsStack: NavigationBarNode[] = [];
+    let parent: NavigationBarNode;
+
+    function rootNavigationBarNode(sourceFile: SourceFile): NavigationBarNode {
+        Debug.assert(!parentsStack.length);
+        const root: NavigationBarNode = { node: sourceFile, additionalNodes: void 0, parent: void 0, children: void 0, indent: 0 };
+        parent = root;
+        for (const statement of sourceFile.statements) {
+            addChildrenRecursively(statement);
+        }
+        endNode();
+        Debug.assert(parent === void 0 && !parentsStack.length);
+        return root;
+    }
+
+    function addLeafNode(node: Node): void {
+        pushChild(parent, emptyNavigationBarNode(node));
+    }
+
+    function emptyNavigationBarNode(node: Node): NavigationBarNode {
+        return {
+            node,
+            additionalNodes: void 0,
+            parent,
+            children: void 0,
+            indent: parent.indent + 1
+        };
+    }
+
+    /**
+     * Add a new level of NavigationBarNodes.
+     * This pushes to the stack, so you must call `endNode` when you are done adding to this node.
+     */
+    function startNode(node: Node): void {
+        const navNode: NavigationBarNode = emptyNavigationBarNode(node);
+        pushChild(parent, navNode);
+
+        // Save the old parent
+        parentsStack.push(parent);
+        parent = navNode;
+    }
+
+    /** Call after calling `startNode` and adding children to it. */
+    function endNode(): void {
+        if (parent.children !== void 0) {
+            mergeChildren(parent.children);
+            sortChildren(parent.children);
+        }
+        parent = parentsStack.pop();
+    }
+
+    function addNodeWithRecursiveChild(node: Node, child: Node): void {
+        startNode(node);
+        addChildrenRecursively(child);
+        endNode();
+    }
+
+    /** Look for navigation bar items in node's subtree, adding them to the current `parent`. */
+    function addChildrenRecursively(node: Node): void {
+        if (node === void 0 || isToken(node)) {
+            return;
         }
 
-        return getItemsWorker(getTopLevelNodes(sourceFile), createTopLevelItem);
+        switch (node.kind) {
+            case SyntaxKind.Constructor:
+                // Get parameter properties, and treat them as being on the *same* level as the constructor, not under it.
+                const ctr = <ConstructorDeclaration>node;
+                addNodeWithRecursiveChild(ctr, ctr.body);
 
-        function getIndent(node: Node): number {
-            let indent = 1; // Global node is the only one with indent 0.
+                // Parameter properties are children of the class, not the constructor.
+                for (const param of ctr.parameters) {
+                    if (isParameterPropertyDeclaration(param)) {
+                        addLeafNode(param);
+                    }
+                }
+                break;
 
-            let current = node.parent;
-            while (current) {
-                switch (current.kind) {
-                    case SyntaxKind.ModuleDeclaration:
-                        // If we have a module declared as A.B.C, it is more "intuitive"
-                        // to say it only has a single layer of depth
-                        do {
-                            current = current.parent;
-                        }
-                        while (current.kind === SyntaxKind.ModuleDeclaration);
+            case SyntaxKind.MethodDeclaration:
+            case SyntaxKind.GetAccessor:
+            case SyntaxKind.SetAccessor:
+            case SyntaxKind.MethodSignature:
+                if (!hasDynamicName((<ClassElement | TypeElement>node))) {
+                    addNodeWithRecursiveChild(node, (<FunctionLikeDeclaration>node).body);
+                }
+                break;
 
-                        // fall through
-                    case SyntaxKind.ClassDeclaration:
-                    case SyntaxKind.EnumDeclaration:
-                    case SyntaxKind.InterfaceDeclaration:
-                    case SyntaxKind.FunctionDeclaration:
-                        indent++;
+            case SyntaxKind.PropertyDeclaration:
+            case SyntaxKind.PropertySignature:
+                if (!hasDynamicName((<ClassElement | TypeElement>node))) {
+                    addLeafNode(node);
+                }
+                break;
+
+            case SyntaxKind.ImportClause:
+                let importClause = <ImportClause>node;
+                // Handle default import case e.g.:
+                //    import d from "mod";
+                if (importClause.name !== void 0) {
+                    addLeafNode(importClause);
                 }
 
-                current = current.parent;
-            }
-
-            return indent;
-        }
-
-        function getChildNodes(nodes: Node[]): Node[] {
-            const childNodes: Node[] = [];
-
-            function visit(node: Node) {
-                switch (node.kind) {
-                    case SyntaxKind.VariableStatement:
-                        forEach((<VariableStatement>node).declarationList.declarations, visit);
-                        break;
-                    case SyntaxKind.ObjectBindingPattern:
-                    case SyntaxKind.ArrayBindingPattern:
-                        forEach((<BindingPattern>node).elements, visit);
-                        break;
-
-                    case SyntaxKind.ExportDeclaration:
-                        // Handle named exports case e.g.:
-                        //    export {a, b as B} from "mod";
-                        if ((<ExportDeclaration>node).exportClause) {
-                            forEach((<ExportDeclaration>node).exportClause.elements, visit);
+                // Handle named bindings in imports e.g.:
+                //    import * as NS from "mod";
+                //    import {a, b as B} from "mod";
+                const {namedBindings} = importClause;
+                if (namedBindings !== void 0) {
+                    if (namedBindings.kind === SyntaxKind.NamespaceImport) {
+                        addLeafNode(<NamespaceImport>namedBindings);
+                    }
+                    else {
+                        for (const element of (<NamedImports>namedBindings).elements) {
+                            addLeafNode(element);
                         }
-                        break;
-
-                    case SyntaxKind.ImportDeclaration:
-                        let importClause = (<ImportDeclaration>node).importClause;
-                        if (importClause) {
-                            // Handle default import case e.g.:
-                            //    import d from "mod";
-                            if (importClause.name) {
-                                childNodes.push(importClause);
-                            }
-
-                            // Handle named bindings in imports e.g.:
-                            //    import * as NS from "mod";
-                            //    import {a, b as B} from "mod";
-                            if (importClause.namedBindings) {
-                                if (importClause.namedBindings.kind === SyntaxKind.NamespaceImport) {
-                                    childNodes.push(importClause.namedBindings);
-                                }
-                                else {
-                                    forEach((<NamedImports>importClause.namedBindings).elements, visit);
-                                }
-                            }
-                        }
-                        break;
-
-                    case SyntaxKind.BindingElement:
-                    case SyntaxKind.VariableDeclaration:
-                        if (isBindingPattern((<VariableDeclaration>node).name)) {
-                            visit((<VariableDeclaration>node).name);
-                            break;
-                        }
-                        // Fall through
-                    case SyntaxKind.ClassDeclaration:
-                    case SyntaxKind.EnumDeclaration:
-                    case SyntaxKind.InterfaceDeclaration:
-                    case SyntaxKind.ModuleDeclaration:
-                    case SyntaxKind.FunctionDeclaration:
-                    case SyntaxKind.ImportEqualsDeclaration:
-                    case SyntaxKind.ImportSpecifier:
-                    case SyntaxKind.ExportSpecifier:
-                    case SyntaxKind.TypeAliasDeclaration:
-                        childNodes.push(node);
-                        break;
+                    }
                 }
-            }
+                break;
 
-            // for (let i = 0, n = nodes.length; i < n; i++) {
-            //    let node = nodes[i];
-
-            //    if (node.kind === SyntaxKind.ClassDeclaration ||
-            //        node.kind === SyntaxKind.EnumDeclaration ||
-            //        node.kind === SyntaxKind.InterfaceDeclaration ||
-            //        node.kind === SyntaxKind.ModuleDeclaration ||
-            //        node.kind === SyntaxKind.FunctionDeclaration) {
-
-            //        childNodes.push(node);
-            //    }
-            //    else if (node.kind === SyntaxKind.VariableStatement) {
-            //        childNodes.push.apply(childNodes, (<VariableStatement>node).declarations);
-            //    }
-            // }
-            forEach(nodes, visit);
-            return sortNodes(childNodes);
-        }
-
-        function getTopLevelNodes(node: SourceFile): Node[] {
-            const topLevelNodes: Node[] = [];
-            topLevelNodes.push(node);
-
-            addTopLevelNodes(node.statements, topLevelNodes);
-
-            return topLevelNodes;
-        }
-
-        function sortNodes(nodes: Node[]): Node[] {
-            return nodes.slice(0).sort((n1: Declaration, n2: Declaration) => {
-                if (n1.name && n2.name) {
-                    return localeCompareFix(getPropertyNameForPropertyNameNode(n1.name), getPropertyNameForPropertyNameNode(n2.name));
+            case SyntaxKind.BindingElement:
+            case SyntaxKind.VariableDeclaration:
+                const decl = <VariableDeclaration>node;
+                const name = decl.name;
+                if (isBindingPattern(name)) {
+                    addChildrenRecursively(name);
                 }
-                else if (n1.name) {
-                    return 1;
-                }
-                else if (n2.name) {
-                    return -1;
+                else if (decl.initializer !== void 0 && isFunctionOrClassExpression(decl.initializer)) {
+                    // For `const x = function() {}`, just use the function node, not the const.
+                    addChildrenRecursively(decl.initializer);
                 }
                 else {
-                    return n1.kind - n2.kind;
+                    addNodeWithRecursiveChild(decl, decl.initializer);
                 }
-            });
+                break;
 
-            // node 0.10 treats "a" as greater than "B".
-            // For consistency, sort alphabetically, falling back to which is lower-case.
-            function localeCompareFix(a: string, b: string) {
-                const cmp = a.toLowerCase().localeCompare(b.toLowerCase());
-                if (cmp !== 0)
-                    return cmp;
-                // Return the *opposite* of the `<` operator, which works the same in node 0.10 and 6.0.
-                return a < b ? 1 : a > b ? -1 : 0;
-            }
-        }
+            case SyntaxKind.ArrowFunction:
+            case SyntaxKind.FunctionDeclaration:
+            case SyntaxKind.FunctionExpression:
+                addNodeWithRecursiveChild(node, (<FunctionLikeDeclaration>node).body);
+                break;
 
-        function addTopLevelNodes(nodes: Node[], topLevelNodes: Node[]): void {
-            nodes = sortNodes(nodes);
+            case SyntaxKind.EnumDeclaration:
+                startNode(node);
+                for (const member of (<EnumDeclaration>node).members) {
+                    if (!isComputedProperty(member)) {
+                        addLeafNode(member);
+                    }
+                }
+                endNode();
+                break;
 
-            for (const node of nodes) {
-                switch (node.kind) {
-                    case SyntaxKind.ClassDeclaration:
-                        topLevelNodes.push(node);
-                        for (const member of (<ClassDeclaration>node).members) {
-                            if (member.kind === SyntaxKind.MethodDeclaration || member.kind === SyntaxKind.Constructor) {
-                                type FunctionLikeMember = MethodDeclaration | ConstructorDeclaration;
-                                if ((<FunctionLikeMember>member).body) {
-                                    // We do not include methods that does not have child functions in it, because of duplications.
-                                    if (hasNamedFunctionDeclarations((<Block>(<FunctionLikeMember>member).body).statements)) {
-                                        topLevelNodes.push(member);
-                                    }
-                                    addTopLevelNodes((<Block>(<MethodDeclaration>member).body).statements, topLevelNodes);
-                                }
+            case SyntaxKind.ClassDeclaration:
+            case SyntaxKind.ClassExpression:
+            case SyntaxKind.InterfaceDeclaration:
+                startNode(node);
+                for (const member of (<InterfaceDeclaration>node).members) {
+                    addChildrenRecursively(member);
+                }
+                endNode();
+                break;
+
+            case SyntaxKind.ModuleDeclaration:
+                addNodeWithRecursiveChild(node, getInteriorModule(<ModuleDeclaration>node).body);
+                break;
+
+            case SyntaxKind.ExportSpecifier:
+            case SyntaxKind.ImportEqualsDeclaration:
+            case SyntaxKind.IndexSignature:
+            case SyntaxKind.CallSignature:
+            case SyntaxKind.ConstructSignature:
+            case SyntaxKind.TypeAliasDeclaration:
+                addLeafNode(node);
+                break;
+
+            default:
+                if (node.jsDocComments !== void 0) {
+                    for (const jsDocComment of node.jsDocComments) {
+                        for (const tag of jsDocComment.tags) {
+                            if (tag.kind === SyntaxKind.JSDocTypedefTag) {
+                                addLeafNode(tag);
                             }
                         }
-                        break;
-                    case SyntaxKind.EnumDeclaration:
-                    case SyntaxKind.InterfaceDeclaration:
-                    case SyntaxKind.TypeAliasDeclaration:
-                        topLevelNodes.push(node);
-                        break;
-
-                    case SyntaxKind.ModuleDeclaration:
-                        let moduleDeclaration = <ModuleDeclaration>node;
-                        topLevelNodes.push(node);
-                        const inner = getInnermostModule(moduleDeclaration);
-                        if (inner.body) {
-                            addTopLevelNodes((<Block>inner.body).statements, topLevelNodes);
-                        }
-                        break;
-
-                    case SyntaxKind.FunctionDeclaration:
-                        let functionDeclaration = <FunctionLikeDeclaration>node;
-                        if (isTopLevelFunctionDeclaration(functionDeclaration)) {
-                            topLevelNodes.push(node);
-                            addTopLevelNodes((<Block>functionDeclaration.body).statements, topLevelNodes);
-                        }
-                        break;
+                    }
                 }
-            }
-        }
 
-        function hasNamedFunctionDeclarations(nodes: NodeArray<Statement>): boolean {
-            for (const s of nodes) {
-                if (s.kind === SyntaxKind.FunctionDeclaration && !isEmpty((<FunctionDeclaration>s).name.text)) {
+                forEachChild(node, addChildrenRecursively);
+        }
+    }
+
+    /** Merge declarations of the same kind. */
+    function mergeChildren(children: NavigationBarNode[]): void {
+        const nameToItems: Map<NavigationBarNode | NavigationBarNode[]> = {};
+        filterMutate(children, child => {
+            const decl = <Declaration>child.node;
+            const name = decl.name && nodeText(decl.name);
+            if (name === void 0) {
+                // Anonymous items are never merged.
+                return true;
+            }
+
+            const itemsWithSameName = getProperty(nameToItems, name);
+            if (itemsWithSameName === void 0) {
+                nameToItems[name] = child;
+                return true;
+            }
+
+            if (itemsWithSameName instanceof Array) {
+                for (const itemWithSameName of itemsWithSameName) {
+                    if (tryMerge(itemWithSameName, child)) {
+                        return false;
+                    }
+                }
+                itemsWithSameName.push(child);
+                return true;
+            }
+            else {
+                const itemWithSameName = itemsWithSameName;
+                if (tryMerge(itemWithSameName, child)) {
+                    return false;
+                }
+                nameToItems[name] = [itemWithSameName, child];
+                return true;
+            }
+
+            function tryMerge(a: NavigationBarNode, b: NavigationBarNode): boolean {
+                if (shouldReallyMerge(a.node, b.node)) {
+                    merge(a, b);
                     return true;
                 }
+                return false;
             }
-            return false;
-        }
+        });
 
-        function isTopLevelFunctionDeclaration(functionDeclaration: FunctionLikeDeclaration): boolean {
-            if (functionDeclaration.kind === SyntaxKind.FunctionDeclaration) {
-                // A function declaration is 'top level' if it contains any function declarations
-                // within it.
-                if (functionDeclaration.body && functionDeclaration.body.kind === SyntaxKind.Block) {
-                    // Proper function declarations can only have identifier names
-                    if (hasNamedFunctionDeclarations((<Block>functionDeclaration.body).statements)) {
-                        return true;
-                    }
+        /** a and b have the same name, but they may not be mergeable. */
+        function shouldReallyMerge(a: Node, b: Node): boolean {
+            return a.kind === b.kind && (a.kind !== SyntaxKind.ModuleDeclaration || areSameModule(<ModuleDeclaration>a, <ModuleDeclaration>b));
 
-                    // Or if it is not parented by another function. I.e all functions at module scope are 'top level'.
-                    if (!isFunctionBlock(functionDeclaration.parent)) {
-                        return true;
-                    }
-
-                    // Or if it is nested inside class methods and constructors.
-                    else {
-                        // We have made sure that a grand parent node exists with 'isFunctionBlock()' above.
-                        const grandParentKind = functionDeclaration.parent.parent.kind;
-                        if (grandParentKind === SyntaxKind.MethodDeclaration ||
-                            grandParentKind === SyntaxKind.Constructor) {
-
-                            return true;
-                        }
-                    }
+            // We use 1 NavNode to represent 'A.B.C', but there are multiple source nodes.
+            // Only merge module nodes that have the same chain. Don't merge 'A.B.C' with 'A'!
+            function areSameModule(a: ModuleDeclaration, b: ModuleDeclaration): boolean {
+                if (a.body.kind !== b.body.kind) {
+                    return false;
                 }
-            }
-
-            return false;
-        }
-
-        function getItemsWorker(nodes: Node[], createItem: (n: Node) => ts.NavigationBarItem): ts.NavigationBarItem[] {
-            const items: ts.NavigationBarItem[] = [];
-
-            const keyToItem: Map<NavigationBarItem> = {};
-
-            for (const child of nodes) {
-                const item = createItem(child);
-                if (item !== undefined) {
-                    if (item.text.length > 0) {
-                        const key = item.text + "-" + item.kind + "-" + item.indent;
-
-                        const itemWithSameName = keyToItem[key];
-                        if (itemWithSameName) {
-                            // We had an item with the same name.  Merge these items together.
-                            merge(itemWithSameName, item);
-                        }
-                        else {
-                            keyToItem[key] = item;
-                            items.push(item);
-                        }
-                    }
-                }
-            }
-
-            return items;
-        }
-
-        function merge(target: ts.NavigationBarItem, source: ts.NavigationBarItem) {
-            // First, add any spans in the source to the target.
-            addRange(target.spans, source.spans);
-
-            if (source.childItems) {
-                if (!target.childItems) {
-                    target.childItems = [];
-                }
-
-                // Next, recursively merge or add any children in the source as appropriate.
-                outer:
-                for (const sourceChild of source.childItems) {
-                    for (const targetChild of target.childItems) {
-                        if (targetChild.text === sourceChild.text && targetChild.kind === sourceChild.kind) {
-                            // Found a match.  merge them.
-                            merge(targetChild, sourceChild);
-                            continue outer;
-                        }
-                    }
-
-                    // Didn't find a match, just add this child to the list.
-                    target.childItems.push(sourceChild);
+                if (a.body.kind !== SyntaxKind.ModuleDeclaration) {
+                    return true;
                 }
+                return areSameModule(<ModuleDeclaration>a.body, <ModuleDeclaration>b.body);
             }
         }
 
-        function createChildItem(node: Node): ts.NavigationBarItem {
-            switch (node.kind) {
-                case SyntaxKind.Parameter:
-                    if (isBindingPattern((<ParameterDeclaration>node).name)) {
-                        break;
+        /** Merge source into target. Source should be thrown away after this is called. */
+        function merge(target: NavigationBarNode, source: NavigationBarNode): void {
+            target.additionalNodes = target.additionalNodes || [];
+            target.additionalNodes.push(source.node);
+            if (source.additionalNodes !== void 0) {
+                target.additionalNodes.push(...source.additionalNodes);
+            }
+
+            target.children = concatenate(target.children, source.children);
+            if (target.children !== void 0) {
+                mergeChildren(target.children);
+                sortChildren(target.children);
+            }
+        }
+    }
+
+    /** Recursively ensure that each NavNode's children are in sorted order. */
+    function sortChildren(children: NavigationBarNode[]): void {
+        children.sort(compareChildren);
+    }
+
+    function compareChildren(child1: NavigationBarNode, child2: NavigationBarNode): number {
+        const name1 = tryGetName(child1.node), name2 = tryGetName(child2.node);
+        if (name1 !== void 0 && name2 !== void 0) {
+            const cmp = localeCompareFix(name1, name2);
+            return cmp !== 0 ? cmp : navigationBarNodeKind(child1) - navigationBarNodeKind(child2);
+        }
+        else {
+            return name1 !== void 0 ? 1 : name2 !== void 0 ? -1 : navigationBarNodeKind(child1) - navigationBarNodeKind(child2);
+        }
+    }
+
+    // More efficient to create a collator once and use its `compare` than to call `a.localeCompare(b)` many times.
+    const collator: { compare(a: string, b: string): number } = typeof Intl === "undefined" ? void 0 : new Intl.Collator();
+    // Intl is missing in Safari, and node 0.10 treats "a" as greater than "B".
+    const localeCompareIsCorrect = collator && collator.compare("a", "B") < 0;
+    const localeCompareFix: (a: string, b: string) => number = localeCompareIsCorrect ? collator.compare : function(a, b) {
+        // This isn't perfect, but it passes all of our tests.
+        for (let i = 0; i < Math.min(a.length, b.length); i++) {
+            const chA = a.charAt(i), chB = b.charAt(i);
+            if (chA === "\"" && chB === "'") {
+                return 1;
+            }
+            if (chA === "'" && chB === "\"") {
+                return -1;
+            }
+            const cmp = chA.toLocaleLowerCase().localeCompare(chB.toLocaleLowerCase());
+            if (cmp !== 0) {
+                return cmp;
+            }
+        }
+        return a.length - b.length;
+    };
+
+    /**
+     * This differs from getItemName because this is just used for sorting.
+     * We only sort nodes by name that have a more-or-less "direct" name, as opposed to `new()` and the like.
+     * So `new()` can still come before an `aardvark` method.
+     */
+    function tryGetName(node: Node): string | undefined {
+        if (node.kind === SyntaxKind.ModuleDeclaration) {
+            return getModuleName(<ModuleDeclaration>node);
+        }
+
+        const decl = <Declaration>node;
+        if (decl.name !== void 0) {
+            return getPropertyNameForPropertyNameNode(decl.name);
+        }
+        switch (node.kind) {
+            case SyntaxKind.FunctionExpression:
+            case SyntaxKind.ArrowFunction:
+            case SyntaxKind.ClassExpression:
+                return getFunctionOrClassName(<FunctionExpression | ArrowFunction | ClassExpression>node);
+            case SyntaxKind.JSDocTypedefTag:
+                return getJSDocTypedefTagName(<JSDocTypedefTag>node);
+            default:
+                return void 0;
+        }
+    }
+
+    function getItemName(node: Node): string {
+        if (node.kind === SyntaxKind.ModuleDeclaration) {
+            return getModuleName(<ModuleDeclaration>node);
+        }
+
+        const name = (<Declaration>node).name;
+        if (name !== void 0) {
+            const text = nodeText(name);
+            if (text.length > 0) {
+                return text;
+            }
+        }
+
+        switch (node.kind) {
+            case SyntaxKind.SourceFile:
+                const sourceFile = <SourceFile>node;
+                return isExternalModule(sourceFile)
+                    ? `"${escapeString(getBaseFileName(removeFileExtension(normalizePath(sourceFile.fileName))))}"`
+                    : "<global>";
+            case SyntaxKind.ArrowFunction:
+            case SyntaxKind.FunctionDeclaration:
+            case SyntaxKind.FunctionExpression:
+            case SyntaxKind.ClassDeclaration:
+            case SyntaxKind.ClassExpression:
+                if (node.flags & NodeFlags.Default) {
+                    return "default";
+                }
+                return getFunctionOrClassName(<ArrowFunction | FunctionExpression | ClassExpression>node);
+            case SyntaxKind.Constructor:
+                return "constructor";
+            case SyntaxKind.ConstructSignature:
+                return "new()";
+            case SyntaxKind.CallSignature:
+                return "()";
+            case SyntaxKind.IndexSignature:
+                return "[]";
+            case SyntaxKind.JSDocTypedefTag:
+                return getJSDocTypedefTagName(<JSDocTypedefTag>node);
+            default:
+                Debug.fail();
+                return "";
+        }
+    }
+
+    function getJSDocTypedefTagName(node: JSDocTypedefTag): string {
+        if (node.name !== void 0) {
+            return node.name.text;
+        }
+        else {
+            const parentNode = node.parent && node.parent.parent;
+            if (parentNode && parentNode.kind === SyntaxKind.VariableStatement) {
+                if ((<VariableStatement>parentNode).declarationList.declarations.length > 0) {
+                    const nameIdentifier = (<VariableStatement>parentNode).declarationList.declarations[0].name;
+                    if (nameIdentifier.kind === SyntaxKind.Identifier) {
+                        return (<Identifier>nameIdentifier).text;
                     }
-                    if ((node.flags & NodeFlags.Modifier) === 0) {
-                        return undefined;
+                }
+            }
+            return "<typedef>";
+        }
+    }
+
+    /** Flattens the NavNode tree to a list, keeping only the top-level items. */
+    function topLevelItems(root: NavigationBarNode): NavigationBarNode[] {
+        const topLevel: NavigationBarNode[] = [];
+        function recur(item: NavigationBarNode) {
+            if (isTopLevel(item)) {
+                topLevel.push(item);
+                if (item.children !== void 0) {
+                    for (const child of item.children) {
+                        recur(child);
                     }
-                    return createItem(node, getTextOfNode((<ParameterDeclaration>node).name), ts.ScriptElementKind.memberVariableElement);
-
-                case SyntaxKind.MethodDeclaration:
-                case SyntaxKind.MethodSignature:
-                    return createItem(node, getTextOfNode((<MethodDeclaration>node).name), ts.ScriptElementKind.memberFunctionElement);
-
-                case SyntaxKind.GetAccessor:
-                    return createItem(node, getTextOfNode((<AccessorDeclaration>node).name), ts.ScriptElementKind.memberGetAccessorElement);
-
-                case SyntaxKind.SetAccessor:
-                    return createItem(node, getTextOfNode((<AccessorDeclaration>node).name), ts.ScriptElementKind.memberSetAccessorElement);
-
-                case SyntaxKind.IndexSignature:
-                    return createItem(node, "[]", ts.ScriptElementKind.indexSignatureElement);
-
-                case SyntaxKind.EnumDeclaration:
-                    return createItem(node, getTextOfNode((<EnumDeclaration>node).name), ts.ScriptElementKind.enumElement);
-
-                case SyntaxKind.EnumMember:
-                    return createItem(node, getTextOfNode((<EnumMember>node).name), ts.ScriptElementKind.memberVariableElement);
-
-                case SyntaxKind.ModuleDeclaration:
-                    return createItem(node, getModuleName(<ModuleDeclaration>node), ts.ScriptElementKind.moduleElement);
-
-                case SyntaxKind.InterfaceDeclaration:
-                    return createItem(node, getTextOfNode((<InterfaceDeclaration>node).name), ts.ScriptElementKind.interfaceElement);
-
-                case SyntaxKind.TypeAliasDeclaration:
-                    return createItem(node, getTextOfNode((<TypeAliasDeclaration>node).name), ts.ScriptElementKind.typeElement);
-
-                case SyntaxKind.CallSignature:
-                    return createItem(node, "()", ts.ScriptElementKind.callSignatureElement);
-
-                case SyntaxKind.ConstructSignature:
-                    return createItem(node, "new()", ts.ScriptElementKind.constructSignatureElement);
-
-                case SyntaxKind.PropertyDeclaration:
-                case SyntaxKind.PropertySignature:
-                    return createItem(node, getTextOfNode((<PropertyDeclaration>node).name), ts.ScriptElementKind.memberVariableElement);
+                }
+            }
+        }
+        recur(root);
+        return topLevel;
 
+        function isTopLevel(item: NavigationBarNode): boolean {
+            switch (navigationBarNodeKind(item)) {
                 case SyntaxKind.ClassDeclaration:
-                    return createItem(node, getTextOfNode((<ClassDeclaration>node).name), ts.ScriptElementKind.classElement);
-
-                case SyntaxKind.FunctionDeclaration:
-                    return createItem(node, getTextOfNode((<FunctionLikeDeclaration>node).name), ts.ScriptElementKind.functionElement);
-
-                case SyntaxKind.VariableDeclaration:
-                case SyntaxKind.BindingElement:
-                    let variableDeclarationNode: Node;
-                    let name: Node;
-
-                    if (node.kind === SyntaxKind.BindingElement) {
-                        name = (<BindingElement>node).name;
-                        variableDeclarationNode = node;
-                        // binding elements are added only for variable declarations
-                        // bubble up to the containing variable declaration
-                        while (variableDeclarationNode && variableDeclarationNode.kind !== SyntaxKind.VariableDeclaration) {
-                            variableDeclarationNode = variableDeclarationNode.parent;
-                        }
-                        Debug.assert(variableDeclarationNode !== undefined);
-                    }
-                    else {
-                        Debug.assert(!isBindingPattern((<VariableDeclaration>node).name));
-                        variableDeclarationNode = node;
-                        name = (<VariableDeclaration>node).name;
-                    }
-
-                    if (isConst(variableDeclarationNode)) {
-                        return createItem(node, getTextOfNode(name), ts.ScriptElementKind.constElement);
-                    }
-                    else if (isLet(variableDeclarationNode)) {
-                        return createItem(node, getTextOfNode(name), ts.ScriptElementKind.letElement);
-                    }
-                    else {
-                        return createItem(node, getTextOfNode(name), ts.ScriptElementKind.variableElement);
-                    }
+                case SyntaxKind.ClassExpression:
+                case SyntaxKind.EnumDeclaration:
+                case SyntaxKind.InterfaceDeclaration:
+                case SyntaxKind.ModuleDeclaration:
+                case SyntaxKind.SourceFile:
+                case SyntaxKind.TypeAliasDeclaration:
+                case SyntaxKind.JSDocTypedefTag:
+                    return true;
 
                 case SyntaxKind.Constructor:
-                    return createItem(node, "constructor", ts.ScriptElementKind.constructorImplementationElement);
+                case SyntaxKind.MethodDeclaration:
+                case SyntaxKind.GetAccessor:
+                case SyntaxKind.SetAccessor:
+                    return hasSomeImportantChild(item);
 
-                case SyntaxKind.ExportSpecifier:
-                case SyntaxKind.ImportSpecifier:
-                case SyntaxKind.ImportEqualsDeclaration:
-                case SyntaxKind.ImportClause:
-                case SyntaxKind.NamespaceImport:
-                    return createItem(node, getTextOfNode((<Declaration>node).name), ts.ScriptElementKind.alias);
+                case SyntaxKind.ArrowFunction:
+                case SyntaxKind.FunctionDeclaration:
+                case SyntaxKind.FunctionExpression:
+                    return isTopLevelFunctionDeclaration(item);
+
+                default:
+                    return false;
             }
+            function isTopLevelFunctionDeclaration(item: NavigationBarNode): boolean {
+                if ((<FunctionDeclaration>item.node).body === void 0) {
+                    return false;
+                }
 
-            return undefined;
-
-            function createItem(node: Node, name: string, scriptElementKind: string): NavigationBarItem {
-                return getNavigationBarItem(name, scriptElementKind, getNodeModifiers(node), [getNodeSpan(node)]);
+                switch (navigationBarNodeKind(item.parent)) {
+                    case SyntaxKind.ModuleBlock:
+                    case SyntaxKind.SourceFile:
+                    case SyntaxKind.MethodDeclaration:
+                    case SyntaxKind.Constructor:
+                        return true;
+                    default:
+                        return hasSomeImportantChild(item);
+                }
+            }
+            function hasSomeImportantChild(item: NavigationBarNode) {
+                return forEach(item.children, child => {
+                    const childKind = navigationBarNodeKind(child);
+                    return childKind !== SyntaxKind.VariableDeclaration && childKind !== SyntaxKind.BindingElement;
+                });
             }
         }
+    }
 
-        function isEmpty(text: string) {
-            return !text || text.trim() === "";
-        }
+    // NavigationBarItem requires an array, but will not mutate it, so just give it this for performance.
+    const emptyChildItemArray: NavigationBarItem[] = [];
 
-        function getNavigationBarItem(text: string, kind: string, kindModifiers: string, spans: TextSpan[], childItems: NavigationBarItem[] = [], indent = 0): NavigationBarItem {
-            if (isEmpty(text)) {
-                return undefined;
-            }
+    function convertToTopLevelItem(n: NavigationBarNode): NavigationBarItem {
+        return {
+            text: getItemName(n.node),
+            kind: nodeKind(n.node),
+            kindModifiers: getNodeModifiers(n.node),
+            spans: getSpans(n),
+            childItems: map(n.children, convertToChildItem) || emptyChildItemArray,
+            indent: n.indent,
+            bolded: false,
+            grayed: false
+        };
 
+        function convertToChildItem(n: NavigationBarNode): NavigationBarItem {
             return {
-                text,
-                kind,
-                kindModifiers,
-                spans,
-                childItems,
-                indent,
+                text: getItemName(n.node),
+                kind: nodeKind(n.node),
+                kindModifiers: getNodeModifiers(n.node),
+                spans: getSpans(n),
+                childItems: emptyChildItemArray,
+                indent: 0,
                 bolded: false,
                 grayed: false
             };
         }
 
-        function createTopLevelItem(node: Node): ts.NavigationBarItem {
-            switch (node.kind) {
-                case SyntaxKind.SourceFile:
-                    return createSourceFileItem(<SourceFile>node);
-
-                case SyntaxKind.ClassDeclaration:
-                    return createClassItem(<ClassDeclaration>node);
-
-                case SyntaxKind.MethodDeclaration:
-                case SyntaxKind.Constructor:
-                    return createMemberFunctionLikeItem(<MethodDeclaration | ConstructorDeclaration>node);
-
-                case SyntaxKind.EnumDeclaration:
-                    return createEnumItem(<EnumDeclaration>node);
-
-                case SyntaxKind.InterfaceDeclaration:
-                    return createInterfaceItem(<InterfaceDeclaration>node);
-
-                case SyntaxKind.ModuleDeclaration:
-                    return createModuleItem(<ModuleDeclaration>node);
-
-                case SyntaxKind.FunctionDeclaration:
-                    return createFunctionItem(<FunctionDeclaration>node);
-
-                case SyntaxKind.TypeAliasDeclaration:
-                    return createTypeAliasItem(<TypeAliasDeclaration>node);
-            }
-
-            return undefined;
-
-            function createModuleItem(node: ModuleDeclaration): NavigationBarItem {
-                const moduleName = getModuleName(node);
-
-                const body = <Block>getInnermostModule(node).body;
-                const childItems = body ? getItemsWorker(getChildNodes(body.statements), createChildItem) : [];
-
-                return getNavigationBarItem(moduleName,
-                    ts.ScriptElementKind.moduleElement,
-                    getNodeModifiers(node),
-                    [getNodeSpan(node)],
-                    childItems,
-                    getIndent(node));
-            }
-
-            function createFunctionItem(node: FunctionDeclaration): ts.NavigationBarItem  {
-                if (node.body && node.body.kind === SyntaxKind.Block) {
-                    const childItems = getItemsWorker(sortNodes((<Block>node.body).statements), createChildItem);
-
-                    return getNavigationBarItem(!node.name ? "default" : node.name.text,
-                        ts.ScriptElementKind.functionElement,
-                        getNodeModifiers(node),
-                        [getNodeSpan(node)],
-                        childItems,
-                        getIndent(node));
+        function getSpans(n: NavigationBarNode): TextSpan[] {
+            const spans = [getNodeSpan(n.node)];
+            if (n.additionalNodes !== void 0) {
+                for (const node of n.additionalNodes) {
+                    spans.push(getNodeSpan(node));
                 }
-
-                return undefined;
             }
-
-            function createTypeAliasItem(node: TypeAliasDeclaration): ts.NavigationBarItem {
-                return getNavigationBarItem(node.name.text,
-                    ts.ScriptElementKind.typeElement,
-                    getNodeModifiers(node),
-                    [getNodeSpan(node)],
-                    [],
-                    getIndent(node));
-            }
-
-            function createMemberFunctionLikeItem(node: MethodDeclaration | ConstructorDeclaration): ts.NavigationBarItem  {
-                if (node.body && node.body.kind === SyntaxKind.Block) {
-                    const childItems = getItemsWorker(sortNodes((<Block>node.body).statements), createChildItem);
-                    let scriptElementKind: string;
-                    let memberFunctionName: string;
-                    if (node.kind === SyntaxKind.MethodDeclaration) {
-                        memberFunctionName = getPropertyNameForPropertyNameNode(node.name);
-                        scriptElementKind = ts.ScriptElementKind.memberFunctionElement;
-                    }
-                    else {
-                        memberFunctionName = "constructor";
-                        scriptElementKind = ts.ScriptElementKind.constructorImplementationElement;
-                    }
-
-                    return getNavigationBarItem(memberFunctionName,
-                        scriptElementKind,
-                        getNodeModifiers(node),
-                        [getNodeSpan(node)],
-                        childItems,
-                        getIndent(node));
-                }
-
-                return undefined;
-            }
-
-            function createSourceFileItem(node: SourceFile): ts.NavigationBarItem {
-                const childItems = getItemsWorker(getChildNodes(node.statements), createChildItem);
-
-                const rootName = isExternalModule(node)
-                    ? "\"" + escapeString(getBaseFileName(removeFileExtension(normalizePath(node.fileName)))) + "\""
-                    : "<global>";
-
-                return getNavigationBarItem(rootName,
-                    ts.ScriptElementKind.moduleElement,
-                    ts.ScriptElementKindModifier.none,
-                    [getNodeSpan(node)],
-                    childItems);
-            }
-
-            function createClassItem(node: ClassDeclaration): ts.NavigationBarItem {
-                let childItems: NavigationBarItem[];
-
-                if (node.members) {
-                    const constructor = <ConstructorDeclaration>forEach(node.members, member => {
-                        return member.kind === SyntaxKind.Constructor && member;
-                    });
-
-                    // Add the constructor parameters in as children of the class (for property parameters).
-                    // Note that *all non-binding pattern named* parameters will be added to the nodes array, but parameters that
-                    // are not properties will be filtered out later by createChildItem.
-                    const nodes: Node[] = removeDynamicallyNamedProperties(node);
-                    if (constructor) {
-                        addRange(nodes, filter(constructor.parameters, p => !isBindingPattern(p.name)));
-                    }
-
-                    childItems = getItemsWorker(sortNodes(nodes), createChildItem);
-                }
-
-                const nodeName = !node.name ? "default" : node.name.text;
-
-                return getNavigationBarItem(
-                    nodeName,
-                    ts.ScriptElementKind.classElement,
-                    getNodeModifiers(node),
-                    [getNodeSpan(node)],
-                    childItems,
-                    getIndent(node));
-            }
-
-            function createEnumItem(node: EnumDeclaration): ts.NavigationBarItem {
-                const childItems = getItemsWorker(sortNodes(removeComputedProperties(node)), createChildItem);
-                return getNavigationBarItem(
-                    node.name.text,
-                    ts.ScriptElementKind.enumElement,
-                    getNodeModifiers(node),
-                    [getNodeSpan(node)],
-                    childItems,
-                    getIndent(node));
-            }
-
-            function createInterfaceItem(node: InterfaceDeclaration): ts.NavigationBarItem {
-                const childItems = getItemsWorker(sortNodes(removeDynamicallyNamedProperties(node)), createChildItem);
-                return getNavigationBarItem(
-                    node.name.text,
-                    ts.ScriptElementKind.interfaceElement,
-                    getNodeModifiers(node),
-                    [getNodeSpan(node)],
-                    childItems,
-                    getIndent(node));
-            }
-        }
-
-        function getModuleName(moduleDeclaration: ModuleDeclaration): string {
-            // We want to maintain quotation marks.
-            if (isAmbientModule(moduleDeclaration)) {
-                return getTextOfNode(moduleDeclaration.name);
-            }
-
-            // Otherwise, we need to aggregate each identifier to build up the qualified name.
-            const result: string[] = [];
-
-            result.push(moduleDeclaration.name.text);
-
-            while (moduleDeclaration.body && moduleDeclaration.body.kind === SyntaxKind.ModuleDeclaration) {
-                moduleDeclaration = <ModuleDeclaration>moduleDeclaration.body;
-
-                result.push(moduleDeclaration.name.text);
-            }
-
-            return result.join(".");
-        }
-
-        function removeComputedProperties(node: EnumDeclaration): Declaration[] {
-            return filter<Declaration>(node.members, member => member.name === undefined || member.name.kind !== SyntaxKind.ComputedPropertyName);
-        }
-
-        /**
-         * Like removeComputedProperties, but retains the properties with well known symbol names
-         */
-        function removeDynamicallyNamedProperties(node: ClassDeclaration | InterfaceDeclaration): Declaration[] {
-            return filter<Declaration>(node.members, member => !hasDynamicName(member));
-        }
-
-        function getInnermostModule(node: ModuleDeclaration): ModuleDeclaration {
-            while (node.body && node.body.kind === SyntaxKind.ModuleDeclaration) {
-                node = <ModuleDeclaration>node.body;
-            }
-
-            return node;
-        }
-
-        function getNodeSpan(node: Node) {
-            return node.kind === SyntaxKind.SourceFile
-                ? createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-                : createTextSpanFromBounds(node.getStart(), node.getEnd());
-        }
-
-        function getTextOfNode(node: Node): string {
-            return getTextOfNodeFromSourceText(sourceFile.text, node);
+            return spans;
         }
     }
 
-    export function getJsNavigationBarItems(sourceFile: SourceFile, compilerOptions: CompilerOptions): NavigationBarItem[] {
-        const anonFnText = "<function>";
-        const anonClassText = "<class>";
-        let indent = 0;
+    // TODO: GH#9145: We should just use getNodeKind. No reason why navigationBar and navigateTo should have different behaviors.
+    function nodeKind(node: Node): string {
+        switch (node.kind) {
+            case SyntaxKind.SourceFile:
+                return ScriptElementKind.moduleElement;
 
-        const rootName = isExternalModule(sourceFile) ?
-            "\"" + escapeString(getBaseFileName(removeFileExtension(normalizePath(sourceFile.fileName)))) + "\""
-            : "<global>";
+            case SyntaxKind.EnumMember:
+                return ScriptElementKind.memberVariableElement;
 
-        const sourceFileItem = getNavBarItem(rootName, ScriptElementKind.moduleElement, [getNodeSpan(sourceFile)]);
-        let topItem = sourceFileItem;
+            case SyntaxKind.VariableDeclaration:
+            case SyntaxKind.BindingElement:
+                let variableDeclarationNode: Node;
+                let name: Node;
 
-        // Walk the whole file, because we want to also find function expressions - which may be in variable initializer,
-        // call arguments, expressions, etc...
-        forEachChild(sourceFile, visitNode);
-
-        function visitNode(node: Node) {
-            const newItem = createNavBarItem(node);
-
-            if (newItem) {
-                topItem.childItems.push(newItem);
-            }
-
-            if (node.jsDocComments && node.jsDocComments.length > 0) {
-                for (const jsDocComment of node.jsDocComments) {
-                    visitNode(jsDocComment);
-                }
-            }
-
-            // Add a level if traversing into a container
-            if (newItem && (isFunctionLike(node) || isClassLike(node))) {
-                const lastTop = topItem;
-                indent++;
-                topItem = newItem;
-                forEachChild(node, visitNode);
-                topItem = lastTop;
-                indent--;
-
-                // If the last item added was an anonymous function expression, and it had no children, discard it.
-                if (newItem && newItem.text === anonFnText && newItem.childItems.length === 0) {
-                    topItem.childItems.pop();
-                }
-            }
-            else {
-                forEachChild(node, visitNode);
-            }
-        }
-
-        function createNavBarItem(node: Node): NavigationBarItem {
-            switch (node.kind) {
-                case SyntaxKind.VariableDeclaration:
-                    // Only add to the navbar if at the top-level of the file
-                    // Note: "const" and "let" are also SyntaxKind.VariableDeclarations
-                    if (node.parent/*VariableDeclarationList*/.parent/*VariableStatement*/
-                           .parent/*SourceFile*/.kind !== SyntaxKind.SourceFile) {
-                        return undefined;
+                if (node.kind === SyntaxKind.BindingElement) {
+                    name = (<BindingElement>node).name;
+                    variableDeclarationNode = node;
+                    // binding elements are added only for variable declarations
+                    // bubble up to the containing variable declaration
+                    while (variableDeclarationNode && variableDeclarationNode.kind !== SyntaxKind.VariableDeclaration) {
+                        variableDeclarationNode = variableDeclarationNode.parent;
                     }
-                    // If it is initialized with a function expression, handle it when we reach the function expression node
-                    const varDecl = node as VariableDeclaration;
-                    if (varDecl.initializer && (varDecl.initializer.kind === SyntaxKind.FunctionExpression ||
-                                                varDecl.initializer.kind === SyntaxKind.ArrowFunction ||
-                                                varDecl.initializer.kind === SyntaxKind.ClassExpression)) {
-                        return undefined;
-                    }
-                    // Fall through
-                case SyntaxKind.FunctionDeclaration:
-                case SyntaxKind.ClassDeclaration:
-                case SyntaxKind.Constructor:
-                case SyntaxKind.GetAccessor:
-                case SyntaxKind.SetAccessor:
-                    // "export default function().." looks just like a regular function/class declaration, except with the 'default' flag
-                    const name = node.flags && (node.flags & NodeFlags.Default) && !(node as (Declaration)).name ? "default" :
-                            node.kind === SyntaxKind.Constructor ? "constructor" :
-                            declarationNameToString((node as (Declaration)).name);
-                    return getNavBarItem(name, getScriptKindForElementKind(node.kind), [getNodeSpan(node)]);
-                case SyntaxKind.FunctionExpression:
-                case SyntaxKind.ArrowFunction:
-                case SyntaxKind.ClassExpression:
-                    return getDefineModuleItem(node) || getFunctionOrClassExpressionItem(node);
-                case SyntaxKind.MethodDeclaration:
-                    const methodDecl = node as MethodDeclaration;
-                    return getNavBarItem(declarationNameToString(methodDecl.name),
-                                         ScriptElementKind.memberFunctionElement,
-                                         [getNodeSpan(node)]);
-                case SyntaxKind.ExportAssignment:
-                    // e.g. "export default <expr>"
-                    return getNavBarItem("default", ScriptElementKind.variableElement, [getNodeSpan(node)]);
-                case SyntaxKind.ImportClause:    // e.g. 'def' in: import def from 'mod' (in ImportDeclaration)
-                    if (!(node as ImportClause).name) {
-                        // No default import (this node is still a parent of named & namespace imports, which are handled below)
-                        return undefined;
-                    }
-                    // fall through
-                case SyntaxKind.ImportSpecifier: // e.g. 'id' in: import {id} from 'mod' (in NamedImports, in ImportClause)
-                case SyntaxKind.NamespaceImport: // e.g. '* as ns' in: import * as ns from 'mod' (in ImportClause)
-                case SyntaxKind.ExportSpecifier: // e.g. 'a' or 'b'  in: export {a, foo as b} from 'mod'
-                    // Export specifiers are only interesting if they are reexports from another module, or renamed, else they are already globals
-                    if (node.kind === SyntaxKind.ExportSpecifier) {
-                        if (!(node.parent.parent as ExportDeclaration).moduleSpecifier && !(node as ExportSpecifier).propertyName) {
-                            return undefined;
-                        }
-                    }
-                    const decl = node as (ImportSpecifier | ImportClause | NamespaceImport | ExportSpecifier);
-                    if (!decl.name) {
-                        return undefined;
-                    }
-                    const declName = declarationNameToString(decl.name);
-                    return getNavBarItem(declName, ScriptElementKind.constElement, [getNodeSpan(node)]);
-                case SyntaxKind.JSDocTypedefTag:
-                    if ((<JSDocTypedefTag>node).name) {
-                        return getNavBarItem(
-                            (<JSDocTypedefTag>node).name.text,
-                            ScriptElementKind.typeElement,
-                            [getNodeSpan(node)]);
-                    }
-                    else {
-                        const parentNode = node.parent && node.parent.parent;
-                        if (parentNode && parentNode.kind === SyntaxKind.VariableStatement) {
-                            if ((<VariableStatement>parentNode).declarationList.declarations.length > 0) {
-                                const nameIdentifier = (<VariableStatement>parentNode).declarationList.declarations[0].name;
-                                if (nameIdentifier.kind === SyntaxKind.Identifier) {
-                                    return getNavBarItem(
-                                        (<Identifier>nameIdentifier).text,
-                                        ScriptElementKind.typeElement,
-                                        [getNodeSpan(node)]);
-                                }
-                            }
-                        }
-                    }
-                default:
-                    return undefined;
-            }
-        }
-
-        function getNavBarItem(text: string, kind: string, spans: TextSpan[], kindModifiers = ScriptElementKindModifier.none): NavigationBarItem {
-            return {
-                text, kind, kindModifiers, spans, childItems: [], indent, bolded: false, grayed: false
-            };
-        }
-
-        function getDefineModuleItem(node: Node): NavigationBarItem {
-            if (node.kind !== SyntaxKind.FunctionExpression && node.kind !== SyntaxKind.ArrowFunction) {
-                return undefined;
-            }
-
-            // No match if this is not a call expression to an identifier named 'define'
-            if (node.parent.kind !== SyntaxKind.CallExpression) {
-                return undefined;
-            }
-            const callExpr = node.parent as CallExpression;
-            if (callExpr.expression.kind !== SyntaxKind.Identifier || callExpr.expression.getText() !== "define") {
-                return undefined;
-            }
-
-            // Return a module of either the given text in the first argument, or of the source file path
-            let defaultName = node.getSourceFile().fileName;
-            if (callExpr.arguments[0].kind === SyntaxKind.StringLiteral) {
-                defaultName = ((callExpr.arguments[0]) as StringLiteral).text;
-            }
-            return getNavBarItem(defaultName, ScriptElementKind.moduleElement, [getNodeSpan(node.parent)]);
-        }
-
-        function getFunctionOrClassExpressionItem(node: Node): NavigationBarItem {
-            if (node.kind !== SyntaxKind.FunctionExpression &&
-                    node.kind !== SyntaxKind.ArrowFunction &&
-                    node.kind !== SyntaxKind.ClassExpression) {
-                return undefined;
-            }
-
-            const fnExpr = node as FunctionExpression | ArrowFunction | ClassExpression;
-            let fnName: string;
-            if (fnExpr.name && getFullWidth(fnExpr.name) > 0) {
-                // The expression has an identifier, so use that as the name
-                fnName = declarationNameToString(fnExpr.name);
-            }
-            else {
-                // See if it is a var initializer. If so, use the var name.
-                if (fnExpr.parent.kind === SyntaxKind.VariableDeclaration) {
-                    fnName = declarationNameToString((fnExpr.parent as VariableDeclaration).name);
-                }
-                // See if it is of the form "<expr> = function(){...}". If so, use the text from the left-hand side.
-                else if (fnExpr.parent.kind === SyntaxKind.BinaryExpression &&
-                         (fnExpr.parent as BinaryExpression).operatorToken.kind === SyntaxKind.EqualsToken) {
-                    fnName = (fnExpr.parent as BinaryExpression).left.getText();
-                }
-                // See if it is a property assignment, and if so use the property name
-                else if (fnExpr.parent.kind === SyntaxKind.PropertyAssignment &&
-                         (fnExpr.parent as PropertyAssignment).name) {
-                    fnName = (fnExpr.parent as PropertyAssignment).name.getText();
+                    Debug.assert(variableDeclarationNode !== void 0);
                 }
                 else {
-                    fnName = node.kind === SyntaxKind.ClassExpression ? anonClassText : anonFnText;
+                    Debug.assert(!isBindingPattern((<VariableDeclaration>node).name));
+                    variableDeclarationNode = node;
+                    name = (<VariableDeclaration>node).name;
                 }
-            }
-            const scriptKind = node.kind === SyntaxKind.ClassExpression ? ScriptElementKind.classElement : ScriptElementKind.functionElement;
-            return getNavBarItem(fnName, scriptKind, [getNodeSpan(node)]);
+
+                if (isConst(variableDeclarationNode)) {
+                    return ts.ScriptElementKind.constElement;
+                }
+                else if (isLet(variableDeclarationNode)) {
+                    return ts.ScriptElementKind.letElement;
+                }
+                else {
+                    return ts.ScriptElementKind.variableElement;
+                }
+
+            case SyntaxKind.ArrowFunction:
+                return ts.ScriptElementKind.functionElement;
+
+            case SyntaxKind.JSDocTypedefTag:
+                return ScriptElementKind.typeElement;
+
+            default:
+                return getNodeKind(node);
+        }
+    }
+
+    function getModuleName(moduleDeclaration: ModuleDeclaration): string {
+        // We want to maintain quotation marks.
+        if (isAmbientModule(moduleDeclaration)) {
+            return getTextOfNode(moduleDeclaration.name);
         }
 
-        function getNodeSpan(node: Node) {
-           return node.kind === SyntaxKind.SourceFile
-                ? createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-                : createTextSpanFromBounds(node.getStart(), node.getEnd());
+        // Otherwise, we need to aggregate each identifier to build up the qualified name.
+        const result: string[] = [];
+
+        result.push(moduleDeclaration.name.text);
+
+        while (moduleDeclaration.body && moduleDeclaration.body.kind === SyntaxKind.ModuleDeclaration) {
+            moduleDeclaration = <ModuleDeclaration>moduleDeclaration.body;
+
+            result.push(moduleDeclaration.name.text);
         }
 
-        function getScriptKindForElementKind(kind: SyntaxKind) {
-            switch (kind) {
-                case SyntaxKind.VariableDeclaration:
-                    return ScriptElementKind.variableElement;
-                case SyntaxKind.FunctionDeclaration:
-                    return ScriptElementKind.functionElement;
-                case SyntaxKind.ClassDeclaration:
-                    return ScriptElementKind.classElement;
-                case SyntaxKind.Constructor:
-                    return ScriptElementKind.constructorImplementationElement;
-                case SyntaxKind.GetAccessor:
-                    return ScriptElementKind.memberGetAccessorElement;
-                case SyntaxKind.SetAccessor:
-                    return ScriptElementKind.memberSetAccessorElement;
-                default:
-                    return "unknown";
-            }
-        }
+        return result.join(".");
+    }
 
-        return sourceFileItem.childItems;
+    /**
+     * For 'module A.B.C', we want to get the node for 'C'.
+     * We store 'A' as associated with a NavNode, and use getModuleName to traverse down again.
+     */
+    function getInteriorModule(decl: ModuleDeclaration): ModuleDeclaration {
+        return decl.body.kind === SyntaxKind.ModuleDeclaration ? getInteriorModule(<ModuleDeclaration>decl.body) : decl;
+    }
+
+    function isComputedProperty(member: EnumMember): boolean {
+        return member.name === void 0 || member.name.kind === SyntaxKind.ComputedPropertyName;
+    }
+
+    function getNodeSpan(node: Node): TextSpan {
+        return node.kind === SyntaxKind.SourceFile
+            ? createTextSpanFromBounds(node.getFullStart(), node.getEnd())
+            : createTextSpanFromBounds(node.getStart(sourceFile), node.getEnd());
+    }
+
+    function getFunctionOrClassName(node: FunctionExpression | FunctionDeclaration | ArrowFunction | ClassLikeDeclaration): string {
+        if (node.name !== void 0 && getFullWidth(node.name) > 0) {
+            return declarationNameToString(node.name);
+        }
+        // See if it is a var initializer. If so, use the var name.
+        else if (node.parent.kind === SyntaxKind.VariableDeclaration) {
+            return declarationNameToString((node.parent as VariableDeclaration).name);
+        }
+        // See if it is of the form "<expr> = function(){...}". If so, use the text from the left-hand side.
+        else if (node.parent.kind === SyntaxKind.BinaryExpression &&
+            (node.parent as BinaryExpression).operatorToken.kind === SyntaxKind.EqualsToken) {
+            return nodeText((node.parent as BinaryExpression).left);
+        }
+        // See if it is a property assignment, and if so use the property name
+        else if (node.parent.kind === SyntaxKind.PropertyAssignment && (node.parent as PropertyAssignment).name) {
+            return nodeText((node.parent as PropertyAssignment).name);
+        }
+        // Default exports are named "default"
+        else if (node.flags & NodeFlags.Default) {
+            return "default";
+        }
+        else {
+            return isClassLike(node) ? "<class>" : "<function>";
+        }
+    }
+
+    function isFunctionOrClassExpression(node: Node): boolean {
+        return node.kind === SyntaxKind.FunctionExpression || node.kind === SyntaxKind.ArrowFunction || node.kind === SyntaxKind.ClassExpression;
     }
 }
diff --git a/src/services/services.ts b/src/services/services.ts
index 983ddfbf250..163be48695d 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -7039,7 +7039,7 @@ namespace ts {
         function getNavigationBarItems(fileName: string): NavigationBarItem[] {
             const sourceFile = syntaxTreeCache.getCurrentSourceFile(fileName);
 
-            return NavigationBar.getNavigationBarItems(sourceFile, host.getCompilationSettings());
+            return NavigationBar.getNavigationBarItems(sourceFile);
         }
 
         function getSemanticClassifications(fileName: string, span: TextSpan): ClassifiedSpan[] {
diff --git a/tests/cases/fourslash/navbar_contains-no-duplicates.ts b/tests/cases/fourslash/navbar_contains-no-duplicates.ts
index e259a7bef90..10e4027ff84 100644
--- a/tests/cases/fourslash/navbar_contains-no-duplicates.ts
+++ b/tests/cases/fourslash/navbar_contains-no-duplicates.ts
@@ -7,7 +7,7 @@
 ////         }
 ////     }
 //// }
-//// 
+////
 //// declare module Windows {
 ////     export module Foundation {
 ////         export var B;
@@ -16,13 +16,13 @@
 ////         }
 ////     }
 //// }
-//// 
+////
 //// class ABC {
 ////     public foo() {
 ////         return 3;
 ////     }
 //// }
-//// 
+////
 //// module ABC {
 ////     export var x = 3;
 //// }
@@ -95,13 +95,13 @@ verify.navigationBar([
                 "kindModifiers": "export,declare"
             },
             {
-                "text": "Test",
-                "kind": "class",
+                "text": "B",
+                "kind": "var",
                 "kindModifiers": "export,declare"
             },
             {
-                "text": "B",
-                "kind": "var",
+                "text": "Test",
+                "kind": "class",
                 "kindModifiers": "export,declare"
             },
             {
diff --git a/tests/cases/fourslash/navbar_exportDefault.ts b/tests/cases/fourslash/navbar_exportDefault.ts
index dc99cff7d64..e547c9129a6 100644
--- a/tests/cases/fourslash/navbar_exportDefault.ts
+++ b/tests/cases/fourslash/navbar_exportDefault.ts
@@ -16,7 +16,14 @@ goTo.file("a.ts");
 verify.navigationBar([
     {
         "text": "\"a\"",
-        "kind": "module"
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "default",
+                "kind": "class",
+                "kindModifiers": "export"
+            }
+        ]
     },
     {
         "text": "default",
@@ -52,6 +59,13 @@ verify.navigationBar([
     {
         "text": "\"c\"",
         "kind": "module",
+        "childItems": [
+            {
+                "text": "default",
+                "kind": "function",
+                "kindModifiers": "export"
+            }
+        ]
     },
     {
         "text": "default",
diff --git a/tests/cases/fourslash/navigationBarAnonymousClassAndFunctionExpressions.ts b/tests/cases/fourslash/navigationBarAnonymousClassAndFunctionExpressions.ts
new file mode 100644
index 00000000000..f15959812fc
--- /dev/null
+++ b/tests/cases/fourslash/navigationBarAnonymousClassAndFunctionExpressions.ts
@@ -0,0 +1,147 @@
+/// <reference path="fourslash.ts" />
+
+////global.cls = class { };
+////(function() {
+////    const x = () => {
+////        // Presence of inner function causes x to be a top-level function.
+////        function xx() {}
+////    };
+////    const y = {
+////        // This is not a top-level function (contains nothing, but shows up in childItems of its parent.)
+////        foo: function() {}
+////    };
+////    (function nest() {
+////        function moreNest() {}
+////    })();
+////})();
+////(function() { // Different anonymous functions are not merged
+////    // These will only show up as childItems.
+////    function z() {}
+////    console.log(function() {})
+////})
+////(function classes() {
+////    // Classes show up in top-level regardless of whether they have names or inner declarations.
+////    const cls2 = class { };
+////    console.log(class cls3 {});
+////    (class { });
+////})
+
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "<function>",
+                "kind": "function"
+            },
+            {
+                "text": "<function>",
+                "kind": "function"
+            },
+            {
+                "text": "classes",
+                "kind": "function"
+            },
+            {
+                "text": "global.cls",
+                "kind": "class"
+            }
+        ]
+    },
+    {
+        "text": "<function>",
+        "kind": "function",
+        "childItems": [
+            {
+                "text": "nest",
+                "kind": "function"
+            },
+            {
+                "text": "x",
+                "kind": "function"
+            },
+            {
+                "text": "y",
+                "kind": "const"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "nest",
+        "kind": "function",
+        "childItems": [
+            {
+                "text": "moreNest",
+                "kind": "function"
+            }
+        ],
+        "indent": 2
+    },
+    {
+        "text": "x",
+        "kind": "function",
+        "childItems": [
+            {
+                "text": "xx",
+                "kind": "function"
+            }
+        ],
+        "indent": 2
+    },
+    {
+        "text": "<function>",
+        "kind": "function",
+        "childItems": [
+            {
+                "text": "<function>",
+                "kind": "function"
+            },
+            {
+                "text": "z",
+                "kind": "function"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "classes",
+        "kind": "function",
+        "childItems": [
+            {
+                "text": "<class>",
+                "kind": "class"
+            },
+            {
+                "text": "cls2",
+                "kind": "class"
+            },
+            {
+                "text": "cls3",
+                "kind": "class"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "<class>",
+        "kind": "class",
+        "indent": 2
+    },
+    {
+        "text": "cls2",
+        "kind": "class",
+        "indent": 2
+    },
+    {
+        "text": "cls3",
+        "kind": "class",
+        "indent": 2
+    },
+    {
+        "text": "global.cls",
+        "kind": "class",
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarAnonymousClassAndFunctionExpressions2.ts b/tests/cases/fourslash/navigationBarAnonymousClassAndFunctionExpressions2.ts
new file mode 100644
index 00000000000..214a14949ac
--- /dev/null
+++ b/tests/cases/fourslash/navigationBarAnonymousClassAndFunctionExpressions2.ts
@@ -0,0 +1,64 @@
+/// <reference path="fourslash.ts" />
+
+////console.log(console.log(class Y {}, class X {}), console.log(class B {}, class A {}));
+////console.log(class Cls { meth() {} });
+
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "A",
+                "kind": "class"
+            },
+            {
+                "text": "B",
+                "kind": "class"
+            },
+            {
+                "text": "Cls",
+                "kind": "class"
+            },
+            {
+                "text": "X",
+                "kind": "class"
+            },
+            {
+                "text": "Y",
+                "kind": "class"
+            }
+        ]
+    },
+    {
+        "text": "A",
+        "kind": "class",
+        "indent": 1
+    },
+    {
+        "text": "B",
+        "kind": "class",
+        "indent": 1
+    },
+    {
+        "text": "Cls",
+        "kind": "class",
+        "childItems": [
+            {
+                "text": "meth",
+                "kind": "method"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "X",
+        "kind": "class",
+        "indent": 1
+    },
+    {
+        "text": "Y",
+        "kind": "class",
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarGetterAndSetter.ts b/tests/cases/fourslash/navigationBarGetterAndSetter.ts
new file mode 100644
index 00000000000..48105e4e9af
--- /dev/null
+++ b/tests/cases/fourslash/navigationBarGetterAndSetter.ts
@@ -0,0 +1,48 @@
+/// <reference path="fourslash.ts" />
+
+////class X {
+////    get x() {}
+////    set x(value) {
+////        // Inner declaration should make the setter top-level.
+////        function f() {}
+////    }
+////}
+
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "X",
+                "kind": "class"
+            }
+        ]
+    },
+    {
+        "text": "X",
+        "kind": "class",
+        "childItems": [
+            {
+                "text": "x",
+                "kind": "getter"
+            },
+            {
+                "text": "x",
+                "kind": "setter"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "x",
+        "kind": "setter",
+        "childItems": [
+            {
+                "text": "f",
+                "kind": "function"
+            }
+        ],
+        "indent": 2
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarImports.ts b/tests/cases/fourslash/navigationBarImports.ts
new file mode 100644
index 00000000000..43cb99c556a
--- /dev/null
+++ b/tests/cases/fourslash/navigationBarImports.ts
@@ -0,0 +1,30 @@
+/// <reference path="fourslash.ts"/>
+
+////import a, {b} from "m";
+////import c = require("m");
+////import * as d from "m";
+
+verify.navigationBar([
+    {
+        "text": "\"navigationBarImports\"",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "a",
+                "kind": "alias"
+            },
+            {
+                "text": "b",
+                "kind": "alias"
+            },
+            {
+                "text": "c",
+                "kind": "alias"
+            },
+            {
+                "text": "d",
+                "kind": "alias"
+            }
+        ]
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarItemsFunctions.ts b/tests/cases/fourslash/navigationBarItemsFunctions.ts
index 91546462a25..f5aa3fb681d 100644
--- a/tests/cases/fourslash/navigationBarItemsFunctions.ts
+++ b/tests/cases/fourslash/navigationBarItemsFunctions.ts
@@ -32,6 +32,12 @@ verify.navigationBar([
     {
         "text": "baz",
         "kind": "function",
+        "childItems": [
+            {
+                "text": "v",
+                "kind": "var"
+            }
+        ],
         "indent": 1
     },
     {
@@ -41,6 +47,10 @@ verify.navigationBar([
             {
                 "text": "bar",
                 "kind": "function"
+            },
+            {
+                "text": "x",
+                "kind": "var"
             }
         ],
         "indent": 1
@@ -52,6 +62,10 @@ verify.navigationBar([
             {
                 "text": "biz",
                 "kind": "function"
+            },
+            {
+                "text": "y",
+                "kind": "var"
             }
         ],
         "indent": 2
diff --git a/tests/cases/fourslash/navigationBarItemsFunctionsBroken.ts b/tests/cases/fourslash/navigationBarItemsFunctionsBroken.ts
index 96dcbb944ae..2f17a5006ff 100644
--- a/tests/cases/fourslash/navigationBarItemsFunctionsBroken.ts
+++ b/tests/cases/fourslash/navigationBarItemsFunctionsBroken.ts
@@ -18,6 +18,12 @@ verify.navigationBar([
     {
         "text": "f",
         "kind": "function",
+        "childItems": [
+            {
+                "text": "<function>",
+                "kind": "function"
+            }
+        ],
         "indent": 1
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsFunctionsBroken2.ts b/tests/cases/fourslash/navigationBarItemsFunctionsBroken2.ts
index 127bde8c9e7..f907bdad067 100644
--- a/tests/cases/fourslash/navigationBarItemsFunctionsBroken2.ts
+++ b/tests/cases/fourslash/navigationBarItemsFunctionsBroken2.ts
@@ -10,6 +10,10 @@ verify.navigationBar([
         "text": "<global>",
         "kind": "module",
         "childItems": [
+            {
+                "text": "<function>",
+                "kind": "function"
+            },
             {
                 "text": "f",
                 "kind": "function"
@@ -19,6 +23,12 @@ verify.navigationBar([
     {
         "text": "f",
         "kind": "function",
+        "childItems": [
+            {
+                "text": "<function>",
+                "kind": "function"
+            }
+        ],
         "indent": 1
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts b/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
index 28ec25c6f1d..3af3b351114 100644
--- a/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
+++ b/tests/cases/fourslash/navigationBarItemsInsideMethodsAndConstructors.ts
@@ -76,17 +76,17 @@ verify.navigationBar([
                 "kind": "property"
             }
         ],
-        "indent": 2
+        "indent": 3
     },
     {
         "text": "LocalFunctionInConstructor",
         "kind": "function",
-        "indent": 2
+        "indent": 3
     },
     {
         "text": "LocalInterfaceInConstrcutor",
         "kind": "interface",
-        "indent": 2
+        "indent": 3
     },
     {
         "text": "method",
@@ -116,7 +116,7 @@ verify.navigationBar([
                 "kind": "property"
             }
         ],
-        "indent": 2
+        "indent": 3
     },
     {
         "text": "LocalFunctionInMethod",
@@ -127,11 +127,11 @@ verify.navigationBar([
                 "kind": "function"
             }
         ],
-        "indent": 2
+        "indent": 3
     },
     {
         "text": "LocalInterfaceInMethod",
         "kind": "interface",
-        "indent": 2
+        "indent": 3
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsItems2.ts b/tests/cases/fourslash/navigationBarItemsItems2.ts
index 762531d8778..6ab0827e8f9 100644
--- a/tests/cases/fourslash/navigationBarItemsItems2.ts
+++ b/tests/cases/fourslash/navigationBarItemsItems2.ts
@@ -12,6 +12,11 @@ verify.navigationBar([
         "text": "\"navigationBarItemsItems2\"",
         "kind": "module",
         "childItems": [
+            {
+                "text": "<class>",
+                "kind": "class",
+                "kindModifiers": "export"
+            },
             {
                 "text": "A",
                 "kind": "module"
@@ -19,7 +24,7 @@ verify.navigationBar([
         ]
     },
     {
-        "text": "default",
+        "text": "<class>",
         "kind": "class",
         "kindModifiers": "export",
         "indent": 1
diff --git a/tests/cases/fourslash/navigationBarItemsItemsContainsNoAnonymousFunctions.ts b/tests/cases/fourslash/navigationBarItemsItemsContainsNoAnonymousFunctions.ts
deleted file mode 100644
index 276e19624c9..00000000000
--- a/tests/cases/fourslash/navigationBarItemsItemsContainsNoAnonymousFunctions.ts
+++ /dev/null
@@ -1,80 +0,0 @@
-/// <reference path="fourslash.ts"/>
-// @Filename: scriptLexicalStructureItemsContainsNoAnonymouseFunctions_0.ts
-/////*file1*/
-////(function() {
-////    // this should not be included
-////    var x = 0;
-////
-////    // this should not be included either
-////    function foo() {
-////
-////    }
-////})();
-////
-// @Filename: scriptLexicalStructureItemsContainsNoAnonymouseFunctions_1.ts
-/////*file2*/
-////var x = function() {
-////    // this should not be included
-////    var x = 0;
-////
-////    // this should not be included either
-////    function foo() {
-////};
-////
-// @Filename: scriptLexicalStructureItemsContainsNoAnonymouseFunctions_2.ts
-////// Named functions should still show up
-/////*file3*/
-////function foo() {
-////}
-////function bar() {
-////}
-
-goTo.marker("file1");
-verify.navigationBar([
-    {
-        "text": "<global>",
-        "kind": "module"
-    }
-]);
-
-goTo.marker("file2");
-verify.navigationBar([
-    {
-        "text": "<global>",
-        "kind": "module",
-        "childItems": [
-            {
-                "text": "x",
-                "kind": "var"
-            }
-        ]
-    }
-]);
-
-goTo.marker("file3");
-verify.navigationBar([
-    {
-        "text": "<global>",
-        "kind": "module",
-        "childItems": [
-            {
-                "text": "bar",
-                "kind": "function"
-            },
-            {
-                "text": "foo",
-                "kind": "function"
-            }
-        ]
-    },
-    {
-        "text": "bar",
-        "kind": "function",
-        "indent": 1
-    },
-    {
-        "text": "foo",
-        "kind": "function",
-        "indent": 1
-    }
-]);
diff --git a/tests/cases/fourslash/navigationBarItemsMissingName1.ts b/tests/cases/fourslash/navigationBarItemsMissingName1.ts
index af0e89683bc..2a445a5e1ed 100644
--- a/tests/cases/fourslash/navigationBarItemsMissingName1.ts
+++ b/tests/cases/fourslash/navigationBarItemsMissingName1.ts
@@ -8,6 +8,11 @@ verify.navigationBar([
         "text": "\"navigationBarItemsMissingName1\"",
         "kind": "module",
         "childItems": [
+            {
+                "text": "<function>",
+                "kind": "function",
+                "kindModifiers": "export"
+            },
             {
                 "text": "C",
                 "kind": "class"
diff --git a/tests/cases/fourslash/navigationBarItemsMissingName2.ts b/tests/cases/fourslash/navigationBarItemsMissingName2.ts
index 2eda3b07855..a878c5be845 100644
--- a/tests/cases/fourslash/navigationBarItemsMissingName2.ts
+++ b/tests/cases/fourslash/navigationBarItemsMissingName2.ts
@@ -9,10 +9,16 @@
 verify.navigationBar([
     {
         "text": "<global>",
-        "kind": "module"
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "<class>",
+                "kind": "class"
+            }
+        ]
     },
     {
-        "text": "default",
+        "text": "<class>",
         "kind": "class",
         "childItems": [
             {
diff --git a/tests/cases/fourslash/navigationBarItemsModules.ts b/tests/cases/fourslash/navigationBarItemsModules.ts
index 979f22084e5..ec11cd52b94 100644
--- a/tests/cases/fourslash/navigationBarItemsModules.ts
+++ b/tests/cases/fourslash/navigationBarItemsModules.ts
@@ -28,107 +28,107 @@
 //The declarations of A.B.C.x do not get merged, so the 4 vars are independent.
 //The two 'A' modules, however, do get merged, so in reality we have 7 modules.
 verify.navigationBar([
-  {
-    "text": "<global>",
-    "kind": "module",
-    "childItems": [
-      {
-        "text": "A.B.C",
-        "kind": "module"
-      },
-      {
-        "text": "A.B",
-        "kind": "module"
-      },
-      {
-        "text": "A",
-        "kind": "module"
-      },
-      {
-        "text": "\"X.Y.Z\"",
+    {
+        "text": "<global>",
         "kind": "module",
-        "kindModifiers": "declare"
-      },
-      {
+        "childItems": [
+            {
+                "text": "'X2.Y2.Z2'",
+                "kind": "module",
+                "kindModifiers": "declare"
+            },
+            {
+                "text": "\"X.Y.Z\"",
+                "kind": "module",
+                "kindModifiers": "declare"
+            },
+            {
+                "text": "A",
+                "kind": "module"
+            },
+            {
+                "text": "A.B",
+                "kind": "module"
+            },
+            {
+                "text": "A.B.C",
+                "kind": "module"
+            }
+        ]
+    },
+    {
         "text": "'X2.Y2.Z2'",
         "kind": "module",
-        "kindModifiers": "declare"
-      }
-    ]
-  },
-  {
-    "text": "A.B.C",
-    "kind": "module",
-    "childItems": [
-      {
-        "text": "x",
-        "kind": "var",
-        "kindModifiers": "export"
-      }
-    ],
-    "indent": 1
-  },
-  {
-    "text": "A.B",
-    "kind": "module",
-    "childItems": [
-      {
-        "text": "y",
-        "kind": "var",
-        "kindModifiers": "export"
-      }
-    ],
-    "indent": 1
-  },
-  {
-    "text": "A",
-    "kind": "module",
-    "childItems": [
-      {
-        "text": "z",
-        "kind": "var",
-        "kindModifiers": "export"
-      },
-      {
+        "kindModifiers": "declare",
+        "indent": 1
+    },
+    {
+        "text": "\"X.Y.Z\"",
+        "kind": "module",
+        "kindModifiers": "declare",
+        "indent": 1
+    },
+    {
+        "text": "A",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "B",
+                "kind": "module"
+            },
+            {
+                "text": "z",
+                "kind": "var",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 1
+    },
+    {
         "text": "B",
-        "kind": "module"
-      }
-    ],
-    "indent": 1
-  },
-  {
-    "text": "B",
-    "kind": "module",
-    "childItems": [
-      {
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "C",
+                "kind": "module"
+            }
+        ],
+        "indent": 2
+    },
+    {
         "text": "C",
-        "kind": "module"
-      }
-    ],
-    "indent": 2
-  },
-  {
-    "text": "C",
-    "kind": "module",
-    "childItems": [
-      {
-        "text": "x",
-        "kind": "var",
-        "kindModifiers": "declare"
-      }
-    ],
-    "indent": 3
-  },
-  {
-    "text": "\"X.Y.Z\"",
-    "kind": "module",
-    "kindModifiers": "declare",
-    "indent": 1
-  },
-  {
-    "text": "'X2.Y2.Z2'",
-    "kind": "module",
-    "kindModifiers": "declare",
-    "indent": 1
-  }
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "x",
+                "kind": "var",
+                "kindModifiers": "declare"
+            }
+        ],
+        "indent": 3
+    },
+    {
+        "text": "A.B",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "y",
+                "kind": "var",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "A.B.C",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "x",
+                "kind": "var",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 1
+    }
 ]);
diff --git a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
index 2ee4c93a2f1..4a29d718f2e 100644
--- a/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
+++ b/tests/cases/fourslash/navigationBarItemsMultilineStringIdentifiers.ts
@@ -30,12 +30,9 @@ verify.navigationBar([
         "kind": "module",
         "childItems": [
             {
-                "text": "Bar",
-                "kind": "class"
-            },
-            {
-                "text": "Foo",
-                "kind": "interface"
+                "text": "\"Multiline\\\nMadness\"",
+                "kind": "module",
+                "kindModifiers": "declare"
             },
             {
                 "text": "\"Multiline\\r\\nMadness\"",
@@ -43,17 +40,38 @@ verify.navigationBar([
                 "kindModifiers": "declare"
             },
             {
-                "text": "\"Multiline\\\nMadness\"",
+                "text": "\"MultilineMadness\"",
                 "kind": "module",
                 "kindModifiers": "declare"
             },
             {
-                "text": "\"MultilineMadness\"",
-                "kind": "module",
-                "kindModifiers": "declare"
+                "text": "Bar",
+                "kind": "class"
+            },
+            {
+                "text": "Foo",
+                "kind": "interface"
             }
         ]
     },
+    {
+        "text": "\"Multiline\\\nMadness\"",
+        "kind": "module",
+        "kindModifiers": "declare",
+        "indent": 1
+    },
+    {
+        "text": "\"Multiline\\r\\nMadness\"",
+        "kind": "module",
+        "kindModifiers": "declare",
+        "indent": 1
+    },
+    {
+        "text": "\"MultilineMadness\"",
+        "kind": "module",
+        "kindModifiers": "declare",
+        "indent": 1
+    },
     {
         "text": "Bar",
         "kind": "class",
@@ -83,23 +101,5 @@ verify.navigationBar([
             }
         ],
         "indent": 1
-    },
-    {
-        "text": "\"Multiline\\r\\nMadness\"",
-        "kind": "module",
-        "kindModifiers": "declare",
-        "indent": 1
-    },
-    {
-        "text": "\"Multiline\\\nMadness\"",
-        "kind": "module",
-        "kindModifiers": "declare",
-        "indent": 1
-    },
-    {
-        "text": "\"MultilineMadness\"",
-        "kind": "module",
-        "kindModifiers": "declare",
-        "indent": 1
     }
 ]);
diff --git a/tests/cases/fourslash/navigationBarJsDoc.ts b/tests/cases/fourslash/navigationBarJsDoc.ts
index 20a235bce95..a2d33e216bf 100644
--- a/tests/cases/fourslash/navigationBarJsDoc.ts
+++ b/tests/cases/fourslash/navigationBarJsDoc.ts
@@ -6,16 +6,32 @@
 ////const x = 0;
 
 verify.navigationBar([
+  {
+    "text": "<global>",
+    "kind": "module",
+    "childItems": [
+      {
+        "text": "NumberLike",
+        "kind": "type"
+      },
+      {
+        "text": "x",
+        "kind": "const"
+      },
+      {
+        "text": "x",
+        "kind": "type"
+      }
+    ]
+  },
   {
     "text": "NumberLike",
-    "kind": "type"
+    "kind": "type",
+    "indent": 1,
   },
   {
     "text": "x",
-    "kind": "type"
-  },
-  {
-    "text": "x",
-    "kind": "var"
+    "kind": "type",
+    "indent": 1
   }
 ]);
diff --git a/tests/cases/fourslash/navigationBarMerging.ts b/tests/cases/fourslash/navigationBarMerging.ts
new file mode 100644
index 00000000000..192efe5db44
--- /dev/null
+++ b/tests/cases/fourslash/navigationBarMerging.ts
@@ -0,0 +1,189 @@
+/// <reference path="fourslash.ts"/>
+
+// @Filename: file1.ts
+////module a {
+////    function foo() {}
+////}
+////module b {
+////    function foo() {}
+////}
+////module a {
+////    function bar() {}
+////}
+
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "a",
+                "kind": "module"
+            },
+            {
+                "text": "b",
+                "kind": "module"
+            }
+        ]
+    },
+    {
+        "text": "a",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "bar",
+                "kind": "function"
+            },
+            {
+                "text": "foo",
+                "kind": "function"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "b",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "foo",
+                "kind": "function"
+            }
+        ],
+        "indent": 1
+    }
+]);
+
+// Does not merge unlike declarations.
+// @Filename: file2.ts
+////module a {}
+////function a() {}
+
+goTo.file("file2.ts");
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "a",
+                "kind": "function"
+            },
+            {
+                "text": "a",
+                "kind": "module"
+            }
+        ]
+    },
+    {
+        "text": "a",
+        "kind": "function",
+        "indent": 1
+    },
+    {
+        "text": "a",
+        "kind": "module",
+        "indent": 1
+    }
+]);
+
+// Merges recursively
+// @Filename: file3.ts
+////module a {
+////    interface A {
+////        foo: number;
+////    }
+////}
+////module a {
+////    interface A {
+////        bar: number;
+////    }
+////}
+
+goTo.file("file3.ts");
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "a",
+                "kind": "module"
+            }
+        ]
+    },
+    {
+        "text": "a",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "A",
+                "kind": "interface"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "A",
+        "kind": "interface",
+        "childItems": [
+            {
+                "text": "bar",
+                "kind": "property"
+            },
+            {
+                "text": "foo",
+                "kind": "property"
+            }
+        ],
+        "indent": 2
+    }
+]);
+
+// Does not merge 'module A' with 'module A.B'
+
+// @Filename: file4.ts
+////module A { export var x; }
+////module A.B { export var y; }
+
+goTo.file("file4.ts");
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "A",
+                "kind": "module"
+            },
+            {
+                "text": "A.B",
+                "kind": "module"
+            }
+        ]
+    },
+    {
+        "text": "A",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "x",
+                "kind": "var",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 1
+    },
+    {
+        "text": "A.B",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "y",
+                "kind": "var",
+                "kindModifiers": "export"
+            }
+        ],
+        "indent": 1
+    }
+]);
diff --git a/tests/cases/fourslash/navigationBarVariables.ts b/tests/cases/fourslash/navigationBarVariables.ts
new file mode 100644
index 00000000000..42344c96f73
--- /dev/null
+++ b/tests/cases/fourslash/navigationBarVariables.ts
@@ -0,0 +1,53 @@
+/// <reference path="fourslash.ts"/>
+
+////var x = 0;
+////let y = 1;
+////const z = 2;
+
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "x",
+                "kind": "var"
+            },
+            {
+                "text": "y",
+                "kind": "let"
+            },
+            {
+                "text": "z",
+                "kind": "const"
+            }
+        ]
+    }
+]);
+
+// @Filename: file2.ts
+////var {a} = 0;
+////let {a: b} = 0;
+////const [c] = 0;
+
+goTo.file("file2.ts");
+verify.navigationBar([
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "a",
+                "kind": "var"
+            },
+            {
+                "text": "b",
+                "kind": "let"
+            },
+            {
+                "text": "c",
+                "kind": "const"
+            }
+        ]
+    }
+]);
diff --git a/tests/cases/fourslash/server/jsdocTypedefTagNavigateTo.ts b/tests/cases/fourslash/server/jsdocTypedefTagNavigateTo.ts
index 77cd75aa44c..1c617091f4c 100644
--- a/tests/cases/fourslash/server/jsdocTypedefTagNavigateTo.ts
+++ b/tests/cases/fourslash/server/jsdocTypedefTagNavigateTo.ts
@@ -11,20 +11,36 @@
 //// var numberLike;
 
 verify.navigationBar([
-  {
-    "text": "NumberLike",
-    "kind": "type"
-  },
-  {
-    "text": "NumberLike2",
-    "kind": "type"
-  },
-  {
-    "text": "NumberLike2",
-    "kind": "var"
-  },
-  {
-    "text": "numberLike",
-    "kind": "var"
-  }
+    {
+        "text": "<global>",
+        "kind": "module",
+        "childItems": [
+            {
+                "text": "numberLike",
+                "kind": "var"
+            },
+            {
+                "text": "NumberLike",
+                "kind": "type"
+            },
+            {
+                "text": "NumberLike2",
+                "kind": "var"
+            },
+            {
+                "text": "NumberLike2",
+                "kind": "type"
+            }
+        ]
+    },
+    {
+        "text": "NumberLike",
+        "kind": "type",
+        "indent": 1,
+    },
+    {
+        "text": "NumberLike2",
+        "kind": "type",
+        "indent": 1
+    }
 ]);
\ No newline at end of file

From 48a340f43caeeb38949b77af3569ff2ea9549b36 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Fri, 17 Jun 2016 13:02:26 -0700
Subject: [PATCH 320/332] routine dom update

---
 src/lib/dom.generated.d.ts       | 664 ++++++++++++++++++++++++++++---
 src/lib/webworker.generated.d.ts | 203 +++++++++-
 2 files changed, 793 insertions(+), 74 deletions(-)

diff --git a/src/lib/dom.generated.d.ts b/src/lib/dom.generated.d.ts
index 5865e485754..40cd883af61 100644
--- a/src/lib/dom.generated.d.ts
+++ b/src/lib/dom.generated.d.ts
@@ -4,7 +4,7 @@
 /////////////////////////////
 
 interface Algorithm {
-    name?: string;
+    name: string;
 }
 
 interface AriaRequestEventInit extends EventInit {
@@ -851,6 +851,7 @@ interface UIEventInit extends EventInit {
 }
 
 interface WebGLContextAttributes {
+    failIfMajorPerformanceCaveat?: boolean;
     alpha?: boolean;
     depth?: boolean;
     stencil?: boolean;
@@ -919,7 +920,7 @@ interface ApplicationCache extends EventTarget {
     oncached: (ev: Event) => any;
     onchecking: (ev: Event) => any;
     ondownloading: (ev: Event) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     onnoupdate: (ev: Event) => any;
     onobsolete: (ev: Event) => any;
     onprogress: (ev: ProgressEvent) => any;
@@ -2410,7 +2411,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       * Fires when the user aborts the download.
       * @param ev The event.
       */
-    onabort: (ev: Event) => any;
+    onabort: (ev: UIEvent) => any;
     /**
       * Fires when the object is set as the active element.
       * @param ev The event.
@@ -2512,7 +2513,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       * Fires when an error occurs during object loading.
       * @param ev The event.
       */
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     /**
       * Fires when the object receives focus. 
       * @param ev The event.
@@ -2988,7 +2989,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       * Returns a reference to the first object with the specified value of the ID or NAME attribute.
       * @param elementId String that specifies the ID value. Case-insensitive.
       */
-    getElementById(elementId: string): HTMLElement;
+    getElementById(elementId: string): HTMLElement | null;
     getElementsByClassName(classNames: string): HTMLCollectionOf<Element>;
     /**
       * Gets a collection of objects based on the value of the NAME or ID attribute.
@@ -3463,7 +3464,7 @@ interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelec
     readonly scrollWidth: number;
     readonly tagName: string;
     innerHTML: string;
-    getAttribute(name?: string): string | null;
+    getAttribute(name: string): string | null;
     getAttributeNS(namespaceURI: string, localName: string): string;
     getAttributeNode(name: string): Attr;
     getAttributeNodeNS(namespaceURI: string, localName: string): Attr;
@@ -3673,6 +3674,7 @@ interface Element extends Node, GlobalEventHandlers, ElementTraversal, NodeSelec
     webkitRequestFullscreen(): void;
     getElementsByClassName(classNames: string): NodeListOf<Element>;
     matches(selector: string): boolean;
+    closest(selector: string): Element | null;
     addEventListener(type: "MSGestureChange", listener: (ev: MSGestureEvent) => any, useCapture?: boolean): void;
     addEventListener(type: "MSGestureDoubleTap", listener: (ev: MSGestureEvent) => any, useCapture?: boolean): void;
     addEventListener(type: "MSGestureEnd", listener: (ev: MSGestureEvent) => any, useCapture?: boolean): void;
@@ -4203,7 +4205,7 @@ interface HTMLBodyElement extends HTMLElement {
     onbeforeprint: (ev: Event) => any;
     onbeforeunload: (ev: BeforeUnloadEvent) => any;
     onblur: (ev: FocusEvent) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     onfocus: (ev: FocusEvent) => any;
     onhashchange: (ev: HashChangeEvent) => any;
     onload: (ev: Event) => any;
@@ -4432,9 +4434,9 @@ interface HTMLCanvasElement extends HTMLElement {
       * Returns an object that provides methods and properties for drawing and manipulating images and graphics on a canvas element in a document. A context object includes information about colors, line widths, fonts, and other graphic parameters that can be drawn on a canvas.
       * @param contextId The identifier (ID) of the type of canvas to create. Internet Explorer 9 and Internet Explorer 10 support only a 2-D context using canvas.getContext("2d"); IE11 Preview also supports 3-D or WebGL context using canvas.getContext("experimental-webgl");
       */
-    getContext(contextId: "2d"): CanvasRenderingContext2D;
-    getContext(contextId: "experimental-webgl"): WebGLRenderingContext;
-    getContext(contextId: string, ...args: any[]): CanvasRenderingContext2D | WebGLRenderingContext;
+    getContext(contextId: "2d", contextAttributes?: Canvas2DContextAttributes): CanvasRenderingContext2D | null;
+    getContext(contextId: "webgl" | "experimental-webgl", contextAttributes?: WebGLContextAttributes): WebGLRenderingContext | null;
+    getContext(contextId: string, contextAttributes?: {}): CanvasRenderingContext2D | WebGLRenderingContext | null;
     /**
       * Returns a blob object encoded as a Portable Network Graphics (PNG) format from a canvas image or drawing.
       */
@@ -4444,7 +4446,7 @@ interface HTMLCanvasElement extends HTMLElement {
       * @param type The standard MIME type for the image format to return. If you do not specify this parameter, the default value is a PNG format image.
       */
     toDataURL(type?: string, ...args: any[]): string;
-    toBlob(): Blob;
+    toBlob(callback: (result: Blob | null) => void, ... arguments: any[]): void;
 }
 
 declare var HTMLCanvasElement: {
@@ -4542,7 +4544,7 @@ interface HTMLElement extends Element {
     readonly offsetParent: Element;
     readonly offsetTop: number;
     readonly offsetWidth: number;
-    onabort: (ev: Event) => any;
+    onabort: (ev: UIEvent) => any;
     onactivate: (ev: UIEvent) => any;
     onbeforeactivate: (ev: UIEvent) => any;
     onbeforecopy: (ev: ClipboardEvent) => any;
@@ -4570,7 +4572,7 @@ interface HTMLElement extends Element {
     ondurationchange: (ev: Event) => any;
     onemptied: (ev: Event) => any;
     onended: (ev: MediaStreamErrorEvent) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     onfocus: (ev: FocusEvent) => any;
     oninput: (ev: Event) => any;
     oninvalid: (ev: Event) => any;
@@ -5120,7 +5122,7 @@ interface HTMLFrameSetElement extends HTMLElement {
       * Fires when the object loses the input focus.
       */
     onblur: (ev: FocusEvent) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     /**
       * Fires when the object receives focus.
       */
@@ -5643,7 +5645,7 @@ interface HTMLInputElement extends HTMLElement {
     /**
       * Returns a FileList object on a file type input object.
       */
-    readonly files: FileList;
+    readonly files: FileList | null;
     /**
       * Retrieves a reference to the form that the object is embedded in. 
       */
@@ -6614,7 +6616,7 @@ declare var HTMLOptionElement: {
     create(): HTMLOptionElement;
 }
 
-interface HTMLOptionsCollection extends HTMLCollection {
+interface HTMLOptionsCollection extends HTMLCollectionOf<HTMLOptionElement> {
     length: number;
     selectedIndex: number;
     add(element: HTMLOptionElement | HTMLOptGroupElement, before?: HTMLElement | number): void;
@@ -6778,7 +6780,7 @@ interface HTMLSelectElement extends HTMLElement {
       * Sets or retrieves the name of the object.
       */
     name: string;
-    options: HTMLCollectionOf<HTMLOptionElement>;
+    readonly options: HTMLOptionsCollection;
     /**
       * When present, marks an element that can't be submitted without a value.
       */
@@ -7574,7 +7576,7 @@ interface IDBDatabase extends EventTarget {
     readonly name: string;
     readonly objectStoreNames: DOMStringList;
     onabort: (ev: Event) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     version: number;
     onversionchange: (ev: IDBVersionChangeEvent) => any;
     close(): void;
@@ -7677,7 +7679,7 @@ declare var IDBOpenDBRequest: {
 
 interface IDBRequest extends EventTarget {
     readonly error: DOMError;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     onsuccess: (ev: Event) => any;
     readonly readyState: string;
     readonly result: any;
@@ -7699,7 +7701,7 @@ interface IDBTransaction extends EventTarget {
     readonly mode: string;
     onabort: (ev: Event) => any;
     oncomplete: (ev: Event) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     abort(): void;
     objectStore(name: string): IDBObjectStore;
     readonly READ_ONLY: string;
@@ -7842,7 +7844,7 @@ declare var MSApp: MSApp;
 interface MSAppAsyncOperation extends EventTarget {
     readonly error: DOMError;
     oncomplete: (ev: Event) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     readonly readyState: number;
     readonly result: any;
     start(): void;
@@ -8202,7 +8204,7 @@ declare var MSStreamReader: {
 interface MSWebViewAsyncOperation extends EventTarget {
     readonly error: DOMError;
     oncomplete: (ev: Event) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     readonly readyState: number;
     readonly result: any;
     readonly target: MSHTMLWebViewElement;
@@ -8738,7 +8740,7 @@ interface Node extends EventTarget {
     contains(child: Node): boolean;
     hasAttributes(): boolean;
     hasChildNodes(): boolean;
-    insertBefore(newChild: Node, refChild: Node): Node;
+    insertBefore(newChild: Node, refChild: Node | null): Node;
     isDefaultNamespace(namespaceURI: string | null): boolean;
     isEqualNode(arg: Node): boolean;
     isSameNode(other: Node): boolean;
@@ -8747,7 +8749,6 @@ interface Node extends EventTarget {
     normalize(): void;
     removeChild(oldChild: Node): Node;
     replaceChild(newChild: Node, oldChild: Node): Node;
-    contains(node: Node): boolean;
     readonly ATTRIBUTE_NODE: number;
     readonly CDATA_SECTION_NODE: number;
     readonly COMMENT_NODE: number;
@@ -9283,7 +9284,7 @@ declare var RTCDTMFToneChangeEvent: {
 
 interface RTCDtlsTransport extends RTCStatsProvider {
     ondtlsstatechange: ((ev: RTCDtlsTransportStateChangedEvent) => any) | null;
-    onerror: ((ev: Event) => any) | null;
+    onerror: ((ev: ErrorEvent) => any) | null;
     readonly state: string;
     readonly transport: RTCIceTransport;
     getLocalParameters(): RTCDtlsParameters;
@@ -9338,7 +9339,7 @@ declare var RTCIceCandidatePairChangedEvent: {
 
 interface RTCIceGatherer extends RTCStatsProvider {
     readonly component: string;
-    onerror: ((ev: Event) => any) | null;
+    onerror: ((ev: ErrorEvent) => any) | null;
     onlocalcandidate: ((ev: RTCIceGathererEvent) => any) | null;
     createAssociatedGatherer(): RTCIceGatherer;
     getLocalCandidates(): RTCIceCandidate[];
@@ -9397,7 +9398,7 @@ declare var RTCIceTransportStateChangedEvent: {
 }
 
 interface RTCRtpReceiver extends RTCStatsProvider {
-    onerror: ((ev: Event) => any) | null;
+    onerror: ((ev: ErrorEvent) => any) | null;
     readonly rtcpTransport: RTCDtlsTransport;
     readonly track: MediaStreamTrack | null;
     readonly transport: RTCDtlsTransport | RTCSrtpSdesTransport;
@@ -9417,7 +9418,7 @@ declare var RTCRtpReceiver: {
 }
 
 interface RTCRtpSender extends RTCStatsProvider {
-    onerror: ((ev: Event) => any) | null;
+    onerror: ((ev: ErrorEvent) => any) | null;
     onssrcconflict: ((ev: RTCSsrcConflictEvent) => any) | null;
     readonly rtcpTransport: RTCDtlsTransport;
     readonly track: MediaStreamTrack;
@@ -9438,7 +9439,7 @@ declare var RTCRtpSender: {
 }
 
 interface RTCSrtpSdesTransport extends EventTarget {
-    onerror: ((ev: Event) => any) | null;
+    onerror: ((ev: ErrorEvent) => any) | null;
     readonly transport: RTCIceTransport;
     addEventListener(type: "error", listener: (ev: ErrorEvent) => any, useCapture?: boolean): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
@@ -11478,18 +11479,24 @@ declare var StyleSheetPageList: {
 }
 
 interface SubtleCrypto {
-    decrypt(algorithm: string | Algorithm, key: CryptoKey, data: ArrayBufferView): PromiseLike<any>;
-    deriveBits(algorithm: string | Algorithm, baseKey: CryptoKey, length: number): PromiseLike<any>;
-    deriveKey(algorithm: string | Algorithm, baseKey: CryptoKey, derivedKeyType: string | Algorithm, extractable: boolean, keyUsages: string[]): PromiseLike<any>;
-    digest(algorithm: string | Algorithm, data: ArrayBufferView): PromiseLike<any>;
-    encrypt(algorithm: string | Algorithm, key: CryptoKey, data: ArrayBufferView): PromiseLike<any>;
-    exportKey(format: string, key: CryptoKey): PromiseLike<any>;
-    generateKey(algorithm: string | Algorithm, extractable: boolean, keyUsages: string[]): PromiseLike<any>;
-    importKey(format: string, keyData: ArrayBufferView, algorithm: string | Algorithm | null, extractable: boolean, keyUsages: string[]): PromiseLike<any>;
-    sign(algorithm: string | Algorithm, key: CryptoKey, data: ArrayBufferView): PromiseLike<any>;
-    unwrapKey(format: string, wrappedKey: ArrayBufferView, unwrappingKey: CryptoKey, unwrapAlgorithm: string | Algorithm, unwrappedKeyAlgorithm: string | Algorithm | null, extractable: boolean, keyUsages: string[]): PromiseLike<any>;
-    verify(algorithm: string | Algorithm, key: CryptoKey, signature: ArrayBufferView, data: ArrayBufferView): PromiseLike<any>;
-    wrapKey(format: string, key: CryptoKey, wrappingKey: CryptoKey, wrapAlgorithm: string | Algorithm): PromiseLike<any>;
+    decrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    deriveBits(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, length: number): PromiseLike<ArrayBuffer>;
+    deriveKey(algorithm: string | EcdhKeyDeriveParams | DhKeyDeriveParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, baseKey: CryptoKey, derivedKeyType: string | AesDerivedKeyParams | HmacImportParams | ConcatParams | HkdfCtrParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    digest(algorithm: AlgorithmIdentifier, data: BufferSource): PromiseLike<ArrayBuffer>;
+    encrypt(algorithm: string | RsaOaepParams | AesCtrParams | AesCbcParams | AesCmacParams | AesGcmParams | AesCfbParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    exportKey(format: "jwk", key: CryptoKey): PromiseLike<JsonWebKey>;
+    exportKey(format: "raw" | "pkcs8" | "spki", key: CryptoKey): PromiseLike<ArrayBuffer>;
+    exportKey(format: string, key: CryptoKey): PromiseLike<JsonWebKey | ArrayBuffer>;
+    generateKey(algorithm: string, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair | CryptoKey>;
+    generateKey(algorithm: RsaHashedKeyGenParams | EcKeyGenParams | DhKeyGenParams, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKeyPair>;
+    generateKey(algorithm: AesKeyGenParams | HmacKeyGenParams | Pbkdf2Params, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "jwk", keyData: JsonWebKey, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable:boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: "raw" | "pkcs8" | "spki", keyData: BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable:boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    importKey(format: string, keyData: JsonWebKey | BufferSource, algorithm: string | RsaHashedImportParams | EcKeyImportParams | HmacImportParams | DhImportKeyParams, extractable:boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    sign(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, data: BufferSource): PromiseLike<ArrayBuffer>;
+    unwrapKey(format: string, wrappedKey: BufferSource, unwrappingKey: CryptoKey, unwrapAlgorithm: AlgorithmIdentifier, unwrappedKeyAlgorithm: AlgorithmIdentifier, extractable: boolean, keyUsages: string[]): PromiseLike<CryptoKey>;
+    verify(algorithm: string | RsaPssParams | EcdsaParams | AesCmacParams, key: CryptoKey, signature: BufferSource, data: BufferSource): PromiseLike<boolean>;
+    wrapKey(format: string, key: CryptoKey, wrappingKey: CryptoKey, wrapAlgorithm: AlgorithmIdentifier): PromiseLike<ArrayBuffer>;
 }
 
 declare var SubtleCrypto: {
@@ -11557,7 +11564,7 @@ interface TextTrack extends EventTarget {
     readonly language: string;
     mode: any;
     oncuechange: (ev: Event) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     onload: (ev: Event) => any;
     readonly readyState: number;
     addCue(cue: TextTrackCue): void;
@@ -12046,18 +12053,12 @@ interface WebGLRenderingContext {
     stencilMaskSeparate(face: number, mask: number): void;
     stencilOp(fail: number, zfail: number, zpass: number): void;
     stencilOpSeparate(face: number, fail: number, zfail: number, zpass: number): void;
-    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, pixels: ArrayBufferView): void;
-    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, image: HTMLImageElement): void;
-    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, canvas: HTMLCanvasElement): void;
-    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, video: HTMLVideoElement): void;
-    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, pixels: ImageData): void;
+    texImage2D(target: number, level: number, internalformat: number, width: number, height: number, border: number, format: number, type: number, pixels?: ArrayBufferView): void;
+    texImage2D(target: number, level: number, internalformat: number, format: number, type: number, pixels?: ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
     texParameterf(target: number, pname: number, param: number): void;
     texParameteri(target: number, pname: number, param: number): void;
-    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, pixels: ArrayBufferView): void;
-    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, image: HTMLImageElement): void;
-    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, canvas: HTMLCanvasElement): void;
-    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, video: HTMLVideoElement): void;
-    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, pixels: ImageData): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, width: number, height: number, format: number, type: number, pixels?: ArrayBufferView): void;
+    texSubImage2D(target: number, level: number, xoffset: number, yoffset: number, format: number, type: number, pixels?: ImageData | HTMLVideoElement | HTMLImageElement | HTMLCanvasElement): void;
     uniform1f(location: WebGLUniformLocation | null, x: number): void;
     uniform1fv(location: WebGLUniformLocation, v: Float32Array | number[]): void;
     uniform1i(location: WebGLUniformLocation | null, x: number): void;
@@ -12780,7 +12781,7 @@ interface WebSocket extends EventTarget {
     readonly bufferedAmount: number;
     readonly extensions: string;
     onclose: (ev: CloseEvent) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     onmessage: (ev: MessageEvent) => any;
     onopen: (ev: Event) => any;
     readonly protocol: string;
@@ -12855,7 +12856,7 @@ interface Window extends EventTarget, WindowTimers, WindowSessionStorage, Window
     name: string;
     readonly navigator: Navigator;
     offscreenBuffering: string | boolean;
-    onabort: (ev: Event) => any;
+    onabort: (ev: UIEvent) => any;
     onafterprint: (ev: Event) => any;
     onbeforeprint: (ev: Event) => any;
     onbeforeunload: (ev: BeforeUnloadEvent) => any;
@@ -12971,6 +12972,7 @@ interface Window extends EventTarget, WindowTimers, WindowSessionStorage, Window
     readonly top: Window;
     readonly window: Window;
     URL: typeof URL;
+    Blob: typeof Blob;
     alert(message?: any): void;
     blur(): void;
     cancelAnimationFrame(handle: number): void;
@@ -13127,7 +13129,6 @@ declare var XMLDocument: {
 }
 
 interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
-    msCaching: string;
     onreadystatechange: (ev: ProgressEvent) => any;
     readonly readyState: number;
     readonly response: any;
@@ -13139,6 +13140,7 @@ interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
     timeout: number;
     readonly upload: XMLHttpRequestUpload;
     withCredentials: boolean;
+    msCaching?: string;
     abort(): void;
     getAllResponseHeaders(): string;
     getResponseHeader(header: string): string | null;
@@ -13277,7 +13279,7 @@ declare var XSLTProcessor: {
 }
 
 interface AbstractWorker {
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     addEventListener(type: "error", listener: (ev: ErrorEvent) => any, useCapture?: boolean): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
 }
@@ -13436,7 +13438,7 @@ interface LinkStyle {
 
 interface MSBaseReader {
     onabort: (ev: Event) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     onload: (ev: Event) => any;
     onloadend: (ev: ProgressEvent) => any;
     onloadstart: (ev: Event) => any;
@@ -13501,7 +13503,359 @@ interface NavigatorUserMedia {
 }
 
 interface NodeSelector {
+    querySelector(selectors: "a"): HTMLAnchorElement;
+    querySelector(selectors: "abbr"): HTMLElement;
+    querySelector(selectors: "acronym"): HTMLElement;
+    querySelector(selectors: "address"): HTMLElement;
+    querySelector(selectors: "applet"): HTMLAppletElement;
+    querySelector(selectors: "area"): HTMLAreaElement;
+    querySelector(selectors: "article"): HTMLElement;
+    querySelector(selectors: "aside"): HTMLElement;
+    querySelector(selectors: "audio"): HTMLAudioElement;
+    querySelector(selectors: "b"): HTMLElement;
+    querySelector(selectors: "base"): HTMLBaseElement;
+    querySelector(selectors: "basefont"): HTMLBaseFontElement;
+    querySelector(selectors: "bdo"): HTMLElement;
+    querySelector(selectors: "big"): HTMLElement;
+    querySelector(selectors: "blockquote"): HTMLQuoteElement;
+    querySelector(selectors: "body"): HTMLBodyElement;
+    querySelector(selectors: "br"): HTMLBRElement;
+    querySelector(selectors: "button"): HTMLButtonElement;
+    querySelector(selectors: "canvas"): HTMLCanvasElement;
+    querySelector(selectors: "caption"): HTMLTableCaptionElement;
+    querySelector(selectors: "center"): HTMLElement;
+    querySelector(selectors: "circle"): SVGCircleElement;
+    querySelector(selectors: "cite"): HTMLElement;
+    querySelector(selectors: "clippath"): SVGClipPathElement;
+    querySelector(selectors: "code"): HTMLElement;
+    querySelector(selectors: "col"): HTMLTableColElement;
+    querySelector(selectors: "colgroup"): HTMLTableColElement;
+    querySelector(selectors: "datalist"): HTMLDataListElement;
+    querySelector(selectors: "dd"): HTMLElement;
+    querySelector(selectors: "defs"): SVGDefsElement;
+    querySelector(selectors: "del"): HTMLModElement;
+    querySelector(selectors: "desc"): SVGDescElement;
+    querySelector(selectors: "dfn"): HTMLElement;
+    querySelector(selectors: "dir"): HTMLDirectoryElement;
+    querySelector(selectors: "div"): HTMLDivElement;
+    querySelector(selectors: "dl"): HTMLDListElement;
+    querySelector(selectors: "dt"): HTMLElement;
+    querySelector(selectors: "ellipse"): SVGEllipseElement;
+    querySelector(selectors: "em"): HTMLElement;
+    querySelector(selectors: "embed"): HTMLEmbedElement;
+    querySelector(selectors: "feblend"): SVGFEBlendElement;
+    querySelector(selectors: "fecolormatrix"): SVGFEColorMatrixElement;
+    querySelector(selectors: "fecomponenttransfer"): SVGFEComponentTransferElement;
+    querySelector(selectors: "fecomposite"): SVGFECompositeElement;
+    querySelector(selectors: "feconvolvematrix"): SVGFEConvolveMatrixElement;
+    querySelector(selectors: "fediffuselighting"): SVGFEDiffuseLightingElement;
+    querySelector(selectors: "fedisplacementmap"): SVGFEDisplacementMapElement;
+    querySelector(selectors: "fedistantlight"): SVGFEDistantLightElement;
+    querySelector(selectors: "feflood"): SVGFEFloodElement;
+    querySelector(selectors: "fefunca"): SVGFEFuncAElement;
+    querySelector(selectors: "fefuncb"): SVGFEFuncBElement;
+    querySelector(selectors: "fefuncg"): SVGFEFuncGElement;
+    querySelector(selectors: "fefuncr"): SVGFEFuncRElement;
+    querySelector(selectors: "fegaussianblur"): SVGFEGaussianBlurElement;
+    querySelector(selectors: "feimage"): SVGFEImageElement;
+    querySelector(selectors: "femerge"): SVGFEMergeElement;
+    querySelector(selectors: "femergenode"): SVGFEMergeNodeElement;
+    querySelector(selectors: "femorphology"): SVGFEMorphologyElement;
+    querySelector(selectors: "feoffset"): SVGFEOffsetElement;
+    querySelector(selectors: "fepointlight"): SVGFEPointLightElement;
+    querySelector(selectors: "fespecularlighting"): SVGFESpecularLightingElement;
+    querySelector(selectors: "fespotlight"): SVGFESpotLightElement;
+    querySelector(selectors: "fetile"): SVGFETileElement;
+    querySelector(selectors: "feturbulence"): SVGFETurbulenceElement;
+    querySelector(selectors: "fieldset"): HTMLFieldSetElement;
+    querySelector(selectors: "figcaption"): HTMLElement;
+    querySelector(selectors: "figure"): HTMLElement;
+    querySelector(selectors: "filter"): SVGFilterElement;
+    querySelector(selectors: "font"): HTMLFontElement;
+    querySelector(selectors: "footer"): HTMLElement;
+    querySelector(selectors: "foreignobject"): SVGForeignObjectElement;
+    querySelector(selectors: "form"): HTMLFormElement;
+    querySelector(selectors: "frame"): HTMLFrameElement;
+    querySelector(selectors: "frameset"): HTMLFrameSetElement;
+    querySelector(selectors: "g"): SVGGElement;
+    querySelector(selectors: "h1"): HTMLHeadingElement;
+    querySelector(selectors: "h2"): HTMLHeadingElement;
+    querySelector(selectors: "h3"): HTMLHeadingElement;
+    querySelector(selectors: "h4"): HTMLHeadingElement;
+    querySelector(selectors: "h5"): HTMLHeadingElement;
+    querySelector(selectors: "h6"): HTMLHeadingElement;
+    querySelector(selectors: "head"): HTMLHeadElement;
+    querySelector(selectors: "header"): HTMLElement;
+    querySelector(selectors: "hgroup"): HTMLElement;
+    querySelector(selectors: "hr"): HTMLHRElement;
+    querySelector(selectors: "html"): HTMLHtmlElement;
+    querySelector(selectors: "i"): HTMLElement;
+    querySelector(selectors: "iframe"): HTMLIFrameElement;
+    querySelector(selectors: "image"): SVGImageElement;
+    querySelector(selectors: "img"): HTMLImageElement;
+    querySelector(selectors: "input"): HTMLInputElement;
+    querySelector(selectors: "ins"): HTMLModElement;
+    querySelector(selectors: "isindex"): HTMLUnknownElement;
+    querySelector(selectors: "kbd"): HTMLElement;
+    querySelector(selectors: "keygen"): HTMLElement;
+    querySelector(selectors: "label"): HTMLLabelElement;
+    querySelector(selectors: "legend"): HTMLLegendElement;
+    querySelector(selectors: "li"): HTMLLIElement;
+    querySelector(selectors: "line"): SVGLineElement;
+    querySelector(selectors: "lineargradient"): SVGLinearGradientElement;
+    querySelector(selectors: "link"): HTMLLinkElement;
+    querySelector(selectors: "listing"): HTMLPreElement;
+    querySelector(selectors: "map"): HTMLMapElement;
+    querySelector(selectors: "mark"): HTMLElement;
+    querySelector(selectors: "marker"): SVGMarkerElement;
+    querySelector(selectors: "marquee"): HTMLMarqueeElement;
+    querySelector(selectors: "mask"): SVGMaskElement;
+    querySelector(selectors: "menu"): HTMLMenuElement;
+    querySelector(selectors: "meta"): HTMLMetaElement;
+    querySelector(selectors: "metadata"): SVGMetadataElement;
+    querySelector(selectors: "meter"): HTMLMeterElement;
+    querySelector(selectors: "nav"): HTMLElement;
+    querySelector(selectors: "nextid"): HTMLUnknownElement;
+    querySelector(selectors: "nobr"): HTMLElement;
+    querySelector(selectors: "noframes"): HTMLElement;
+    querySelector(selectors: "noscript"): HTMLElement;
+    querySelector(selectors: "object"): HTMLObjectElement;
+    querySelector(selectors: "ol"): HTMLOListElement;
+    querySelector(selectors: "optgroup"): HTMLOptGroupElement;
+    querySelector(selectors: "option"): HTMLOptionElement;
+    querySelector(selectors: "p"): HTMLParagraphElement;
+    querySelector(selectors: "param"): HTMLParamElement;
+    querySelector(selectors: "path"): SVGPathElement;
+    querySelector(selectors: "pattern"): SVGPatternElement;
+    querySelector(selectors: "picture"): HTMLPictureElement;
+    querySelector(selectors: "plaintext"): HTMLElement;
+    querySelector(selectors: "polygon"): SVGPolygonElement;
+    querySelector(selectors: "polyline"): SVGPolylineElement;
+    querySelector(selectors: "pre"): HTMLPreElement;
+    querySelector(selectors: "progress"): HTMLProgressElement;
+    querySelector(selectors: "q"): HTMLQuoteElement;
+    querySelector(selectors: "radialgradient"): SVGRadialGradientElement;
+    querySelector(selectors: "rect"): SVGRectElement;
+    querySelector(selectors: "rt"): HTMLElement;
+    querySelector(selectors: "ruby"): HTMLElement;
+    querySelector(selectors: "s"): HTMLElement;
+    querySelector(selectors: "samp"): HTMLElement;
+    querySelector(selectors: "script"): HTMLScriptElement;
+    querySelector(selectors: "section"): HTMLElement;
+    querySelector(selectors: "select"): HTMLSelectElement;
+    querySelector(selectors: "small"): HTMLElement;
+    querySelector(selectors: "source"): HTMLSourceElement;
+    querySelector(selectors: "span"): HTMLSpanElement;
+    querySelector(selectors: "stop"): SVGStopElement;
+    querySelector(selectors: "strike"): HTMLElement;
+    querySelector(selectors: "strong"): HTMLElement;
+    querySelector(selectors: "style"): HTMLStyleElement;
+    querySelector(selectors: "sub"): HTMLElement;
+    querySelector(selectors: "sup"): HTMLElement;
+    querySelector(selectors: "svg"): SVGSVGElement;
+    querySelector(selectors: "switch"): SVGSwitchElement;
+    querySelector(selectors: "symbol"): SVGSymbolElement;
+    querySelector(selectors: "table"): HTMLTableElement;
+    querySelector(selectors: "tbody"): HTMLTableSectionElement;
+    querySelector(selectors: "td"): HTMLTableDataCellElement;
+    querySelector(selectors: "template"): HTMLTemplateElement;
+    querySelector(selectors: "text"): SVGTextElement;
+    querySelector(selectors: "textpath"): SVGTextPathElement;
+    querySelector(selectors: "textarea"): HTMLTextAreaElement;
+    querySelector(selectors: "tfoot"): HTMLTableSectionElement;
+    querySelector(selectors: "th"): HTMLTableHeaderCellElement;
+    querySelector(selectors: "thead"): HTMLTableSectionElement;
+    querySelector(selectors: "title"): HTMLTitleElement;
+    querySelector(selectors: "tr"): HTMLTableRowElement;
+    querySelector(selectors: "track"): HTMLTrackElement;
+    querySelector(selectors: "tspan"): SVGTSpanElement;
+    querySelector(selectors: "tt"): HTMLElement;
+    querySelector(selectors: "u"): HTMLElement;
+    querySelector(selectors: "ul"): HTMLUListElement;
+    querySelector(selectors: "use"): SVGUseElement;
+    querySelector(selectors: "var"): HTMLElement;
+    querySelector(selectors: "video"): HTMLVideoElement;
+    querySelector(selectors: "view"): SVGViewElement;
+    querySelector(selectors: "wbr"): HTMLElement;
+    querySelector(selectors: "x-ms-webview"): MSHTMLWebViewElement;
+    querySelector(selectors: "xmp"): HTMLPreElement;
     querySelector(selectors: string): Element;
+    querySelectorAll(selectors: "a"): NodeListOf<HTMLAnchorElement>;
+    querySelectorAll(selectors: "abbr"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "acronym"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "address"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "applet"): NodeListOf<HTMLAppletElement>;
+    querySelectorAll(selectors: "area"): NodeListOf<HTMLAreaElement>;
+    querySelectorAll(selectors: "article"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "aside"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "audio"): NodeListOf<HTMLAudioElement>;
+    querySelectorAll(selectors: "b"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "base"): NodeListOf<HTMLBaseElement>;
+    querySelectorAll(selectors: "basefont"): NodeListOf<HTMLBaseFontElement>;
+    querySelectorAll(selectors: "bdo"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "big"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "blockquote"): NodeListOf<HTMLQuoteElement>;
+    querySelectorAll(selectors: "body"): NodeListOf<HTMLBodyElement>;
+    querySelectorAll(selectors: "br"): NodeListOf<HTMLBRElement>;
+    querySelectorAll(selectors: "button"): NodeListOf<HTMLButtonElement>;
+    querySelectorAll(selectors: "canvas"): NodeListOf<HTMLCanvasElement>;
+    querySelectorAll(selectors: "caption"): NodeListOf<HTMLTableCaptionElement>;
+    querySelectorAll(selectors: "center"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "circle"): NodeListOf<SVGCircleElement>;
+    querySelectorAll(selectors: "cite"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "clippath"): NodeListOf<SVGClipPathElement>;
+    querySelectorAll(selectors: "code"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "col"): NodeListOf<HTMLTableColElement>;
+    querySelectorAll(selectors: "colgroup"): NodeListOf<HTMLTableColElement>;
+    querySelectorAll(selectors: "datalist"): NodeListOf<HTMLDataListElement>;
+    querySelectorAll(selectors: "dd"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "defs"): NodeListOf<SVGDefsElement>;
+    querySelectorAll(selectors: "del"): NodeListOf<HTMLModElement>;
+    querySelectorAll(selectors: "desc"): NodeListOf<SVGDescElement>;
+    querySelectorAll(selectors: "dfn"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "dir"): NodeListOf<HTMLDirectoryElement>;
+    querySelectorAll(selectors: "div"): NodeListOf<HTMLDivElement>;
+    querySelectorAll(selectors: "dl"): NodeListOf<HTMLDListElement>;
+    querySelectorAll(selectors: "dt"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "ellipse"): NodeListOf<SVGEllipseElement>;
+    querySelectorAll(selectors: "em"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "embed"): NodeListOf<HTMLEmbedElement>;
+    querySelectorAll(selectors: "feblend"): NodeListOf<SVGFEBlendElement>;
+    querySelectorAll(selectors: "fecolormatrix"): NodeListOf<SVGFEColorMatrixElement>;
+    querySelectorAll(selectors: "fecomponenttransfer"): NodeListOf<SVGFEComponentTransferElement>;
+    querySelectorAll(selectors: "fecomposite"): NodeListOf<SVGFECompositeElement>;
+    querySelectorAll(selectors: "feconvolvematrix"): NodeListOf<SVGFEConvolveMatrixElement>;
+    querySelectorAll(selectors: "fediffuselighting"): NodeListOf<SVGFEDiffuseLightingElement>;
+    querySelectorAll(selectors: "fedisplacementmap"): NodeListOf<SVGFEDisplacementMapElement>;
+    querySelectorAll(selectors: "fedistantlight"): NodeListOf<SVGFEDistantLightElement>;
+    querySelectorAll(selectors: "feflood"): NodeListOf<SVGFEFloodElement>;
+    querySelectorAll(selectors: "fefunca"): NodeListOf<SVGFEFuncAElement>;
+    querySelectorAll(selectors: "fefuncb"): NodeListOf<SVGFEFuncBElement>;
+    querySelectorAll(selectors: "fefuncg"): NodeListOf<SVGFEFuncGElement>;
+    querySelectorAll(selectors: "fefuncr"): NodeListOf<SVGFEFuncRElement>;
+    querySelectorAll(selectors: "fegaussianblur"): NodeListOf<SVGFEGaussianBlurElement>;
+    querySelectorAll(selectors: "feimage"): NodeListOf<SVGFEImageElement>;
+    querySelectorAll(selectors: "femerge"): NodeListOf<SVGFEMergeElement>;
+    querySelectorAll(selectors: "femergenode"): NodeListOf<SVGFEMergeNodeElement>;
+    querySelectorAll(selectors: "femorphology"): NodeListOf<SVGFEMorphologyElement>;
+    querySelectorAll(selectors: "feoffset"): NodeListOf<SVGFEOffsetElement>;
+    querySelectorAll(selectors: "fepointlight"): NodeListOf<SVGFEPointLightElement>;
+    querySelectorAll(selectors: "fespecularlighting"): NodeListOf<SVGFESpecularLightingElement>;
+    querySelectorAll(selectors: "fespotlight"): NodeListOf<SVGFESpotLightElement>;
+    querySelectorAll(selectors: "fetile"): NodeListOf<SVGFETileElement>;
+    querySelectorAll(selectors: "feturbulence"): NodeListOf<SVGFETurbulenceElement>;
+    querySelectorAll(selectors: "fieldset"): NodeListOf<HTMLFieldSetElement>;
+    querySelectorAll(selectors: "figcaption"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "figure"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "filter"): NodeListOf<SVGFilterElement>;
+    querySelectorAll(selectors: "font"): NodeListOf<HTMLFontElement>;
+    querySelectorAll(selectors: "footer"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "foreignobject"): NodeListOf<SVGForeignObjectElement>;
+    querySelectorAll(selectors: "form"): NodeListOf<HTMLFormElement>;
+    querySelectorAll(selectors: "frame"): NodeListOf<HTMLFrameElement>;
+    querySelectorAll(selectors: "frameset"): NodeListOf<HTMLFrameSetElement>;
+    querySelectorAll(selectors: "g"): NodeListOf<SVGGElement>;
+    querySelectorAll(selectors: "h1"): NodeListOf<HTMLHeadingElement>;
+    querySelectorAll(selectors: "h2"): NodeListOf<HTMLHeadingElement>;
+    querySelectorAll(selectors: "h3"): NodeListOf<HTMLHeadingElement>;
+    querySelectorAll(selectors: "h4"): NodeListOf<HTMLHeadingElement>;
+    querySelectorAll(selectors: "h5"): NodeListOf<HTMLHeadingElement>;
+    querySelectorAll(selectors: "h6"): NodeListOf<HTMLHeadingElement>;
+    querySelectorAll(selectors: "head"): NodeListOf<HTMLHeadElement>;
+    querySelectorAll(selectors: "header"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "hgroup"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "hr"): NodeListOf<HTMLHRElement>;
+    querySelectorAll(selectors: "html"): NodeListOf<HTMLHtmlElement>;
+    querySelectorAll(selectors: "i"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "iframe"): NodeListOf<HTMLIFrameElement>;
+    querySelectorAll(selectors: "image"): NodeListOf<SVGImageElement>;
+    querySelectorAll(selectors: "img"): NodeListOf<HTMLImageElement>;
+    querySelectorAll(selectors: "input"): NodeListOf<HTMLInputElement>;
+    querySelectorAll(selectors: "ins"): NodeListOf<HTMLModElement>;
+    querySelectorAll(selectors: "isindex"): NodeListOf<HTMLUnknownElement>;
+    querySelectorAll(selectors: "kbd"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "keygen"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "label"): NodeListOf<HTMLLabelElement>;
+    querySelectorAll(selectors: "legend"): NodeListOf<HTMLLegendElement>;
+    querySelectorAll(selectors: "li"): NodeListOf<HTMLLIElement>;
+    querySelectorAll(selectors: "line"): NodeListOf<SVGLineElement>;
+    querySelectorAll(selectors: "lineargradient"): NodeListOf<SVGLinearGradientElement>;
+    querySelectorAll(selectors: "link"): NodeListOf<HTMLLinkElement>;
+    querySelectorAll(selectors: "listing"): NodeListOf<HTMLPreElement>;
+    querySelectorAll(selectors: "map"): NodeListOf<HTMLMapElement>;
+    querySelectorAll(selectors: "mark"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "marker"): NodeListOf<SVGMarkerElement>;
+    querySelectorAll(selectors: "marquee"): NodeListOf<HTMLMarqueeElement>;
+    querySelectorAll(selectors: "mask"): NodeListOf<SVGMaskElement>;
+    querySelectorAll(selectors: "menu"): NodeListOf<HTMLMenuElement>;
+    querySelectorAll(selectors: "meta"): NodeListOf<HTMLMetaElement>;
+    querySelectorAll(selectors: "metadata"): NodeListOf<SVGMetadataElement>;
+    querySelectorAll(selectors: "meter"): NodeListOf<HTMLMeterElement>;
+    querySelectorAll(selectors: "nav"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "nextid"): NodeListOf<HTMLUnknownElement>;
+    querySelectorAll(selectors: "nobr"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "noframes"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "noscript"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "object"): NodeListOf<HTMLObjectElement>;
+    querySelectorAll(selectors: "ol"): NodeListOf<HTMLOListElement>;
+    querySelectorAll(selectors: "optgroup"): NodeListOf<HTMLOptGroupElement>;
+    querySelectorAll(selectors: "option"): NodeListOf<HTMLOptionElement>;
+    querySelectorAll(selectors: "p"): NodeListOf<HTMLParagraphElement>;
+    querySelectorAll(selectors: "param"): NodeListOf<HTMLParamElement>;
+    querySelectorAll(selectors: "path"): NodeListOf<SVGPathElement>;
+    querySelectorAll(selectors: "pattern"): NodeListOf<SVGPatternElement>;
+    querySelectorAll(selectors: "picture"): NodeListOf<HTMLPictureElement>;
+    querySelectorAll(selectors: "plaintext"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "polygon"): NodeListOf<SVGPolygonElement>;
+    querySelectorAll(selectors: "polyline"): NodeListOf<SVGPolylineElement>;
+    querySelectorAll(selectors: "pre"): NodeListOf<HTMLPreElement>;
+    querySelectorAll(selectors: "progress"): NodeListOf<HTMLProgressElement>;
+    querySelectorAll(selectors: "q"): NodeListOf<HTMLQuoteElement>;
+    querySelectorAll(selectors: "radialgradient"): NodeListOf<SVGRadialGradientElement>;
+    querySelectorAll(selectors: "rect"): NodeListOf<SVGRectElement>;
+    querySelectorAll(selectors: "rt"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "ruby"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "s"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "samp"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "script"): NodeListOf<HTMLScriptElement>;
+    querySelectorAll(selectors: "section"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "select"): NodeListOf<HTMLSelectElement>;
+    querySelectorAll(selectors: "small"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "source"): NodeListOf<HTMLSourceElement>;
+    querySelectorAll(selectors: "span"): NodeListOf<HTMLSpanElement>;
+    querySelectorAll(selectors: "stop"): NodeListOf<SVGStopElement>;
+    querySelectorAll(selectors: "strike"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "strong"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "style"): NodeListOf<HTMLStyleElement>;
+    querySelectorAll(selectors: "sub"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "sup"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "svg"): NodeListOf<SVGSVGElement>;
+    querySelectorAll(selectors: "switch"): NodeListOf<SVGSwitchElement>;
+    querySelectorAll(selectors: "symbol"): NodeListOf<SVGSymbolElement>;
+    querySelectorAll(selectors: "table"): NodeListOf<HTMLTableElement>;
+    querySelectorAll(selectors: "tbody"): NodeListOf<HTMLTableSectionElement>;
+    querySelectorAll(selectors: "td"): NodeListOf<HTMLTableDataCellElement>;
+    querySelectorAll(selectors: "template"): NodeListOf<HTMLTemplateElement>;
+    querySelectorAll(selectors: "text"): NodeListOf<SVGTextElement>;
+    querySelectorAll(selectors: "textpath"): NodeListOf<SVGTextPathElement>;
+    querySelectorAll(selectors: "textarea"): NodeListOf<HTMLTextAreaElement>;
+    querySelectorAll(selectors: "tfoot"): NodeListOf<HTMLTableSectionElement>;
+    querySelectorAll(selectors: "th"): NodeListOf<HTMLTableHeaderCellElement>;
+    querySelectorAll(selectors: "thead"): NodeListOf<HTMLTableSectionElement>;
+    querySelectorAll(selectors: "title"): NodeListOf<HTMLTitleElement>;
+    querySelectorAll(selectors: "tr"): NodeListOf<HTMLTableRowElement>;
+    querySelectorAll(selectors: "track"): NodeListOf<HTMLTrackElement>;
+    querySelectorAll(selectors: "tspan"): NodeListOf<SVGTSpanElement>;
+    querySelectorAll(selectors: "tt"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "u"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "ul"): NodeListOf<HTMLUListElement>;
+    querySelectorAll(selectors: "use"): NodeListOf<SVGUseElement>;
+    querySelectorAll(selectors: "var"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "video"): NodeListOf<HTMLVideoElement>;
+    querySelectorAll(selectors: "view"): NodeListOf<SVGViewElement>;
+    querySelectorAll(selectors: "wbr"): NodeListOf<HTMLElement>;
+    querySelectorAll(selectors: "x-ms-webview"): NodeListOf<MSHTMLWebViewElement>;
+    querySelectorAll(selectors: "xmp"): NodeListOf<HTMLPreElement>;
     querySelectorAll(selectors: string): NodeListOf<Element>;
 }
 
@@ -13589,18 +13943,21 @@ interface WindowSessionStorage {
 interface WindowTimers extends Object, WindowTimersExtension {
     clearInterval(handle: number): void;
     clearTimeout(handle: number): void;
+    setInterval(handler: (...args: any[]) => void, timeout: number): number;
     setInterval(handler: any, timeout?: any, ...args: any[]): number;
+    setTimeout(handler: (...args: any[]) => void, timeout: number): number;
     setTimeout(handler: any, timeout?: any, ...args: any[]): number;
 }
 
 interface WindowTimersExtension {
     clearImmediate(handle: number): void;
-    setImmediate(expression: any, ...args: any[]): number;
+    setImmediate(handler: (...args: any[]) => void): number;
+    setImmediate(handler: any, ...args: any[]): number;
 }
 
 interface XMLHttpRequestEventTarget {
     onabort: (ev: Event) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     onload: (ev: Event) => any;
     onloadend: (ev: ProgressEvent) => any;
     onloadstart: (ev: Event) => any;
@@ -13624,6 +13981,13 @@ interface StorageEventInit extends EventInit {
     storageArea?: Storage;
 }
 
+interface Canvas2DContextAttributes {
+    alpha?: boolean;
+    willReadFrequently?: boolean;
+    storage?: boolean;
+    [attribute: string]: boolean | string;
+}
+
 interface NodeListOf<TNode extends Node> extends NodeList {
     length: number;
     item(index: number): TNode;
@@ -13673,6 +14037,177 @@ interface ClipboardEventInit extends EventInit {
 interface IDBArrayKey extends Array<IDBValidKey> {
 }
 
+interface RsaKeyGenParams extends Algorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyGenParams extends RsaKeyGenParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaKeyAlgorithm extends KeyAlgorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaHashedImportParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaPssParams {
+    saltLength: number;
+}
+
+interface RsaOaepParams extends Algorithm {
+    label?: BufferSource;
+}
+
+interface EcdsaParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface EcKeyGenParams extends Algorithm {
+    typedCurve: string;
+}
+
+interface EcKeyAlgorithm extends KeyAlgorithm {
+    typedCurve: string;
+}
+
+interface EcKeyImportParams {
+    namedCurve: string;
+}
+
+interface EcdhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface AesCtrParams extends Algorithm {
+    counter: BufferSource;
+    length: number;
+}
+
+interface AesKeyAlgorithm extends KeyAlgorithm {
+    length: number;
+}
+
+interface AesKeyGenParams extends Algorithm {
+    length: number;
+}
+
+interface AesDerivedKeyParams extends Algorithm {
+    length: number;
+}
+
+interface AesCbcParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface AesCmacParams extends Algorithm {
+    length: number;
+}
+
+interface AesGcmParams extends Algorithm {
+    iv: BufferSource;
+    additionalData?: BufferSource;
+    tagLength?: number;
+}
+
+interface AesCfbParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface HmacImportParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface HmacKeyAlgorithm extends KeyAlgorithm {
+    hash: AlgorithmIdentifier;
+    length: number;
+}
+
+interface HmacKeyGenParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface DhKeyGenParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyAlgorithm extends KeyAlgorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface DhImportKeyParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface ConcatParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    algorithmId: Uint8Array;
+    partyUInfo: Uint8Array;
+    partyVInfo: Uint8Array;
+    publicInfo?: Uint8Array;
+    privateInfo?: Uint8Array;
+}
+
+interface HkdfCtrParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    label: BufferSource;
+    context: BufferSource;
+}
+
+interface Pbkdf2Params extends Algorithm {
+    salt: BufferSource;
+    iterations: number;
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaOtherPrimesInfo {
+    r: string;
+    d: string;
+    t: string;
+}
+
+interface JsonWebKey {
+    kty: string;
+    use?: string;
+    key_ops?: string[];
+    alg?: string;
+    kid?: string;
+    x5u?: string;
+    x5c?: string;
+    x5t?: string;
+    ext?: boolean;
+    crv?: string;
+    x?: string;
+    y?: string;
+    d?: string;
+    n?: string;
+    e?: string;
+    p?: string;
+    q?: string;
+    dp?: string;
+    dq?: string;
+    qi?: string;
+    oth?: RsaOtherPrimesInfo[];
+    k?: string;
+}
+
 declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
 
 interface ErrorEventHandler {
@@ -13746,7 +14281,7 @@ declare var msCredentials: MSCredentials;
 declare var name: string;
 declare var navigator: Navigator;
 declare var offscreenBuffering: string | boolean;
-declare var onabort: (ev: Event) => any;
+declare var onabort: (ev: UIEvent) => any;
 declare var onafterprint: (ev: Event) => any;
 declare var onbeforeprint: (ev: Event) => any;
 declare var onbeforeunload: (ev: BeforeUnloadEvent) => any;
@@ -13896,10 +14431,13 @@ declare function dispatchEvent(evt: Event): boolean;
 declare function removeEventListener(type: string, listener?: EventListenerOrEventListenerObject, useCapture?: boolean): void;
 declare function clearInterval(handle: number): void;
 declare function clearTimeout(handle: number): void;
+declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
 declare function setInterval(handler: any, timeout?: any, ...args: any[]): number;
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
 declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;
 declare function clearImmediate(handle: number): void;
-declare function setImmediate(expression: any, ...args: any[]): number;
+declare function setImmediate(handler: (...args: any[]) => void): number;
+declare function setImmediate(handler: any, ...args: any[]): number;
 declare var sessionStorage: Storage;
 declare var localStorage: Storage;
 declare var console: Console;
@@ -14042,4 +14580,6 @@ type MSOutboundPayload = MSVideoSendPayload | MSAudioSendPayload;
 type RTCIceGatherCandidate = RTCIceCandidate | RTCIceCandidateComplete;
 type RTCTransport = RTCDtlsTransport | RTCSrtpSdesTransport;
 type payloadtype = number;
-type IDBValidKey = number | string | Date | IDBArrayKey;
\ No newline at end of file
+type IDBValidKey = number | string | Date | IDBArrayKey;
+type BufferSource = ArrayBuffer | ArrayBufferView;
+type MouseWheelEvent = WheelEvent;
\ No newline at end of file
diff --git a/src/lib/webworker.generated.d.ts b/src/lib/webworker.generated.d.ts
index f5c77b8594d..6db86d71b2a 100644
--- a/src/lib/webworker.generated.d.ts
+++ b/src/lib/webworker.generated.d.ts
@@ -323,7 +323,7 @@ interface IDBDatabase extends EventTarget {
     readonly name: string;
     readonly objectStoreNames: DOMStringList;
     onabort: (ev: Event) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     version: number;
     onversionchange: (ev: IDBVersionChangeEvent) => any;
     close(): void;
@@ -426,7 +426,7 @@ declare var IDBOpenDBRequest: {
 
 interface IDBRequest extends EventTarget {
     readonly error: DOMError;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     onsuccess: (ev: Event) => any;
     readonly readyState: string;
     readonly result: any;
@@ -448,7 +448,7 @@ interface IDBTransaction extends EventTarget {
     readonly mode: string;
     onabort: (ev: Event) => any;
     oncomplete: (ev: Event) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     abort(): void;
     objectStore(name: string): IDBObjectStore;
     readonly READ_ONLY: string;
@@ -516,7 +516,7 @@ declare var MSApp: MSApp;
 interface MSAppAsyncOperation extends EventTarget {
     readonly error: DOMError;
     oncomplete: (ev: Event) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     readonly readyState: number;
     readonly result: any;
     start(): void;
@@ -665,7 +665,7 @@ interface WebSocket extends EventTarget {
     readonly bufferedAmount: number;
     readonly extensions: string;
     onclose: (ev: CloseEvent) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     onmessage: (ev: MessageEvent) => any;
     onopen: (ev: Event) => any;
     readonly protocol: string;
@@ -708,7 +708,6 @@ declare var Worker: {
 }
 
 interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
-    msCaching: string;
     onreadystatechange: (ev: ProgressEvent) => any;
     readonly readyState: number;
     readonly response: any;
@@ -720,6 +719,7 @@ interface XMLHttpRequest extends EventTarget, XMLHttpRequestEventTarget {
     timeout: number;
     readonly upload: XMLHttpRequestUpload;
     withCredentials: boolean;
+    msCaching?: string;
     abort(): void;
     getAllResponseHeaders(): string;
     getResponseHeader(header: string): string | null;
@@ -766,14 +766,14 @@ declare var XMLHttpRequestUpload: {
 }
 
 interface AbstractWorker {
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     addEventListener(type: "error", listener: (ev: ErrorEvent) => any, useCapture?: boolean): void;
     addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
 }
 
 interface MSBaseReader {
     onabort: (ev: Event) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     onload: (ev: Event) => any;
     onloadend: (ev: ProgressEvent) => any;
     onloadstart: (ev: Event) => any;
@@ -819,7 +819,7 @@ interface WindowConsole {
 
 interface XMLHttpRequestEventTarget {
     onabort: (ev: Event) => any;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     onload: (ev: Event) => any;
     onloadend: (ev: ProgressEvent) => any;
     onloadstart: (ev: Event) => any;
@@ -849,7 +849,7 @@ declare var FileReaderSync: {
 
 interface WorkerGlobalScope extends EventTarget, WorkerUtils, DedicatedWorkerGlobalScope, WindowConsole {
     readonly location: WorkerLocation;
-    onerror: (ev: Event) => any;
+    onerror: (ev: ErrorEvent) => any;
     readonly self: WorkerGlobalScope;
     close(): void;
     msWriteProfilerMark(profilerMarkName: string): void;
@@ -905,8 +905,11 @@ interface WorkerUtils extends Object, WindowBase64 {
     clearInterval(handle: number): void;
     clearTimeout(handle: number): void;
     importScripts(...urls: string[]): void;
+    setImmediate(handler: (...args: any[]) => void): number;
     setImmediate(handler: any, ...args: any[]): number;
+    setInterval(handler: (...args: any[]) => void, timeout: number): number;
     setInterval(handler: any, timeout?: any, ...args: any[]): number;
+    setTimeout(handler: (...args: any[]) => void, timeout: number): number;
     setTimeout(handler: any, timeout?: any, ...args: any[]): number;
 }
 
@@ -942,6 +945,177 @@ interface ProgressEventInit extends EventInit {
 interface IDBArrayKey extends Array<IDBValidKey> {
 }
 
+interface RsaKeyGenParams extends Algorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyGenParams extends RsaKeyGenParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaKeyAlgorithm extends KeyAlgorithm {
+    modulusLength: number;
+    publicExponent: Uint8Array;
+}
+
+interface RsaHashedKeyAlgorithm extends RsaKeyAlgorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaHashedImportParams {
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaPssParams {
+    saltLength: number;
+}
+
+interface RsaOaepParams extends Algorithm {
+    label?: BufferSource;
+}
+
+interface EcdsaParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+}
+
+interface EcKeyGenParams extends Algorithm {
+    typedCurve: string;
+}
+
+interface EcKeyAlgorithm extends KeyAlgorithm {
+    typedCurve: string;
+}
+
+interface EcKeyImportParams {
+    namedCurve: string;
+}
+
+interface EcdhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface AesCtrParams extends Algorithm {
+    counter: BufferSource;
+    length: number;
+}
+
+interface AesKeyAlgorithm extends KeyAlgorithm {
+    length: number;
+}
+
+interface AesKeyGenParams extends Algorithm {
+    length: number;
+}
+
+interface AesDerivedKeyParams extends Algorithm {
+    length: number;
+}
+
+interface AesCbcParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface AesCmacParams extends Algorithm {
+    length: number;
+}
+
+interface AesGcmParams extends Algorithm {
+    iv: BufferSource;
+    additionalData?: BufferSource;
+    tagLength?: number;
+}
+
+interface AesCfbParams extends Algorithm {
+    iv: BufferSource;
+}
+
+interface HmacImportParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface HmacKeyAlgorithm extends KeyAlgorithm {
+    hash: AlgorithmIdentifier;
+    length: number;
+}
+
+interface HmacKeyGenParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    length?: number;
+}
+
+interface DhKeyGenParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyAlgorithm extends KeyAlgorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface DhKeyDeriveParams extends Algorithm {
+    public: CryptoKey;
+}
+
+interface DhImportKeyParams extends Algorithm {
+    prime: Uint8Array;
+    generator: Uint8Array;
+}
+
+interface ConcatParams extends Algorithm {
+    hash?: AlgorithmIdentifier;
+    algorithmId: Uint8Array;
+    partyUInfo: Uint8Array;
+    partyVInfo: Uint8Array;
+    publicInfo?: Uint8Array;
+    privateInfo?: Uint8Array;
+}
+
+interface HkdfCtrParams extends Algorithm {
+    hash: AlgorithmIdentifier;
+    label: BufferSource;
+    context: BufferSource;
+}
+
+interface Pbkdf2Params extends Algorithm {
+    salt: BufferSource;
+    iterations: number;
+    hash: AlgorithmIdentifier;
+}
+
+interface RsaOtherPrimesInfo {
+    r: string;
+    d: string;
+    t: string;
+}
+
+interface JsonWebKey {
+    kty: string;
+    use?: string;
+    key_ops?: string[];
+    alg?: string;
+    kid?: string;
+    x5u?: string;
+    x5c?: string;
+    x5t?: string;
+    ext?: boolean;
+    crv?: string;
+    x?: string;
+    y?: string;
+    d?: string;
+    n?: string;
+    e?: string;
+    p?: string;
+    q?: string;
+    dp?: string;
+    dq?: string;
+    qi?: string;
+    oth?: RsaOtherPrimesInfo[];
+    k?: string;
+}
+
 declare type EventListenerOrEventListenerObject = EventListener | EventListenerObject;
 
 interface ErrorEventHandler {
@@ -975,7 +1149,7 @@ interface FunctionStringCallback {
     (data: string): void;
 }
 declare var location: WorkerLocation;
-declare var onerror: (ev: Event) => any;
+declare var onerror: (ev: ErrorEvent) => any;
 declare var self: WorkerGlobalScope;
 declare function close(): void;
 declare function msWriteProfilerMark(profilerMarkName: string): void;
@@ -990,8 +1164,11 @@ declare function clearImmediate(handle: number): void;
 declare function clearInterval(handle: number): void;
 declare function clearTimeout(handle: number): void;
 declare function importScripts(...urls: string[]): void;
+declare function setImmediate(handler: (...args: any[]) => void): number;
 declare function setImmediate(handler: any, ...args: any[]): number;
+declare function setInterval(handler: (...args: any[]) => void, timeout: number): number;
 declare function setInterval(handler: any, timeout?: any, ...args: any[]): number;
+declare function setTimeout(handler: (...args: any[]) => void, timeout: number): number;
 declare function setTimeout(handler: any, timeout?: any, ...args: any[]): number;
 declare function atob(encodedString: string): string;
 declare function btoa(rawString: string): string;
@@ -1002,4 +1179,6 @@ declare function addEventListener(type: "error", listener: (ev: ErrorEvent) => a
 declare function addEventListener(type: "message", listener: (ev: MessageEvent) => any, useCapture?: boolean): void;
 declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
 type IDBKeyPath = string;
-type IDBValidKey = number | string | Date | IDBArrayKey;
\ No newline at end of file
+type IDBValidKey = number | string | Date | IDBArrayKey;
+type BufferSource = ArrayBuffer | ArrayBufferView;
+type MouseWheelEvent = WheelEvent;
\ No newline at end of file

From 86cde9e22204be835572216b10757dcf82af8050 Mon Sep 17 00:00:00 2001
From: Richard Knoll <riknoll@microsoft.com>
Date: Fri, 17 Jun 2016 16:56:23 -0700
Subject: [PATCH 321/332] Updating readDirectory for tsserverProjectSystem unit
 tests

---
 .../cases/unittests/tsserverProjectSystem.ts  | 41 +++++++++----------
 1 file changed, 20 insertions(+), 21 deletions(-)

diff --git a/tests/cases/unittests/tsserverProjectSystem.ts b/tests/cases/unittests/tsserverProjectSystem.ts
index cf382d09463..dcefd491fff 100644
--- a/tests/cases/unittests/tsserverProjectSystem.ts
+++ b/tests/cases/unittests/tsserverProjectSystem.ts
@@ -90,23 +90,6 @@ namespace ts {
         }
     }
 
-    function readDirectory(folder: FSEntry, ext: string, excludes: Path[], result: string[]): void {
-        if (!folder || !isFolder(folder) || contains(excludes, folder.path)) {
-            return;
-        }
-        for (const entry of folder.entries) {
-            if (contains(excludes, entry.path)) {
-                continue;
-            }
-            if (isFolder(entry)) {
-                readDirectory(entry, ext, excludes, result);
-            }
-            else if (fileExtensionIs(entry.path, ext)) {
-                result.push(entry.fullPath);
-            }
-        }
-    }
-
     function checkNumberOfConfiguredProjects(projectService: server.ProjectService, expected: number) {
         assert.equal(projectService.configuredProjects.length, expected, `expected ${expected} configured project(s)`);
     }
@@ -188,10 +171,26 @@ namespace ts {
             }
         }
 
-        readDirectory(path: string, ext: string, excludes: string[]): string[] {
-            const result: string[] = [];
-            readDirectory(this.fs.get(this.toPath(path)), ext, map(excludes, e => toPath(e, path, this.getCanonicalFileName)), result);
-            return result;
+        readDirectory(path: string, extensions?: string[], exclude?: string[], include?: string[]): string[] {
+            const that = this;
+            return ts.matchFiles(path, extensions, exclude, include, this.useCaseSensitiveFileNames, this.getCurrentDirectory(), (dir) => {
+                const result: FileSystemEntries = {
+                    directories: [],
+                    files : []
+                };
+                const dirEntry = that.fs.get(that.toPath(dir));
+                if (isFolder(dirEntry)) {
+                    dirEntry.entries.forEach((entry) => {
+                        if (isFolder(entry)) {
+                            result.directories.push(entry.fullPath);
+                        }
+                        else if (isFile(entry)) {
+                            result.files.push(entry.fullPath);
+                        }
+                    });
+                }
+                return result;
+            });
         }
 
         watchDirectory(directoryName: string, callback: DirectoryWatcherCallback, recursive: boolean): DirectoryWatcher {

From e9226af3f6495b9eff8f40554f5a51e0c2d0b46d Mon Sep 17 00:00:00 2001
From: Daniel Rosenwasser <Daniel.Rosenwasser@microsoft.com>
Date: Fri, 17 Jun 2016 17:18:16 -0700
Subject: [PATCH 322/332] Array#map -> ts.map.

---
 src/compiler/program.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/program.ts b/src/compiler/program.ts
index 111343e08ff..a01f3a4c5b2 100644
--- a/src/compiler/program.ts
+++ b/src/compiler/program.ts
@@ -180,7 +180,7 @@ namespace ts {
 
     function getEffectiveTypeRoots(options: CompilerOptions, host: ModuleResolutionHost) {
         return options.typeRoots ||
-            defaultTypeRoots.map(d => combinePaths(options.configFilePath ? getDirectoryPath(options.configFilePath) : host.getCurrentDirectory(), d));
+            map(defaultTypeRoots, d => combinePaths(options.configFilePath ? getDirectoryPath(options.configFilePath) : host.getCurrentDirectory(), d));
     }
 
     /**

From 95072aab824ba8cc591c778efc7c0e622afa2cd2 Mon Sep 17 00:00:00 2001
From: Richard Knoll <riknoll@microsoft.com>
Date: Fri, 17 Jun 2016 17:11:13 -0700
Subject: [PATCH 323/332] Responding to PR feedback

---
 src/compiler/commandLineParser.ts              |  8 ++++----
 src/compiler/core.ts                           |  2 +-
 src/compiler/sys.ts                            | 10 +++++++++-
 tests/cases/unittests/cachingInServerLSHost.ts |  2 +-
 4 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/src/compiler/commandLineParser.ts b/src/compiler/commandLineParser.ts
index 2b83690372a..9cca35977be 100644
--- a/src/compiler/commandLineParser.ts
+++ b/src/compiler/commandLineParser.ts
@@ -672,7 +672,7 @@ namespace ts {
 
     // Skip over any minified JavaScript files (ending in ".min.js")
     // Skip over dotted files and folders as well
-    const IgnoreFileNamePattern = /(\.min\.js$)|([\\/]\.[\w.])/;
+    const ignoreFileNamePattern = /(\.min\.js$)|([\\/]\.[\w.])/;
     /**
       * Parse the contents of a config file (tsconfig.json).
       * @param json The contents of the config file to parse
@@ -969,7 +969,7 @@ namespace ts {
                     continue;
                 }
 
-                if (IgnoreFileNamePattern.test(file)) {
+                if (ignoreFileNamePattern.test(file)) {
                     continue;
                 }
 
@@ -1055,8 +1055,8 @@ namespace ts {
             // Remove any subpaths under an existing recursively watched directory.
             for (const key in wildcardDirectories) {
                 if (hasProperty(wildcardDirectories, key)) {
-                    for (const recursiveKey in recursiveKeys) {
-                        if (containsPath(recursiveKey, key, path, !useCaseSensitiveFileNames)) {
+                    for (const recursiveKey of recursiveKeys) {
+                        if (key !== recursiveKey && containsPath(recursiveKey, key, path, !useCaseSensitiveFileNames)) {
                             delete wildcardDirectories[key];
                         }
                     }
diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index 56d8262a3ba..c41b4baa9dc 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -1211,7 +1211,7 @@ namespace ts {
     export function isJsxOrTsxExtension(ext: string): boolean {
         return ext === ".jsx" || ext === ".tsx";
     }
-    
+
     export function changeExtension<T extends string | Path>(path: T, newExtension: string): T {
         return <T>(removeFileExtension(path) + newExtension);
     }
diff --git a/src/compiler/sys.ts b/src/compiler/sys.ts
index 70fef01b504..8b977c53111 100644
--- a/src/compiler/sys.ts
+++ b/src/compiler/sys.ts
@@ -381,7 +381,15 @@ namespace ts {
                             continue;
                         }
                         const name = combinePaths(path, entry);
-                        const stat = _fs.statSync(name);
+
+                        let stat: any;
+                        try {
+                            stat = _fs.statSync(name);
+                        }
+                        catch (e) {
+                            continue;
+                        }
+
                         if (stat.isFile()) {
                             files.push(entry);
                         }
diff --git a/tests/cases/unittests/cachingInServerLSHost.ts b/tests/cases/unittests/cachingInServerLSHost.ts
index 65f3cb1ed9b..2608a082d6d 100644
--- a/tests/cases/unittests/cachingInServerLSHost.ts
+++ b/tests/cases/unittests/cachingInServerLSHost.ts
@@ -82,7 +82,7 @@ namespace ts {
         const projectService = new server.ProjectService(serverHost, logger);
         const rootScriptInfo = projectService.openFile(rootFile, /* openedByClient */true);
         const project = projectService.createInferredProject(rootScriptInfo);
-        project.setProjectOptions( {files: [rootScriptInfo.fileName], compilerOptions: {module: ts.ModuleKind.AMD} } );
+        project.setProjectOptions({ files: [rootScriptInfo.fileName], compilerOptions: { module: ts.ModuleKind.AMD } });
         return {
             project,
             rootScriptInfo

From f568ad0ce446557c2198f0892f76d9f7db63d709 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Sat, 18 Jun 2016 12:01:29 -0700
Subject: [PATCH 324/332] Add conditional index signature for
 Canvas2DContextAttributes
 (https://github.com/Microsoft/TypeScript/issues/9244)

---
 src/lib/dom.generated.d.ts | 140 ++++++++++++++++++-------------------
 1 file changed, 70 insertions(+), 70 deletions(-)

diff --git a/src/lib/dom.generated.d.ts b/src/lib/dom.generated.d.ts
index 40cd883af61..0911586dd5d 100644
--- a/src/lib/dom.generated.d.ts
+++ b/src/lib/dom.generated.d.ts
@@ -2290,7 +2290,7 @@ declare var DeviceRotationRate: {
 
 interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEvent {
     /**
-      * Sets or gets the URL for the current document. 
+      * Sets or gets the URL for the current document.
       */
     readonly URL: string;
     /**
@@ -2318,7 +2318,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     applets: HTMLCollectionOf<HTMLAppletElement>;
     /**
-      * Deprecated. Sets or retrieves a value that indicates the background color behind the object. 
+      * Deprecated. Sets or retrieves a value that indicates the background color behind the object.
       */
     bgColor: string;
     /**
@@ -2346,19 +2346,19 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     designMode: string;
     /**
-      * Sets or retrieves a value that indicates the reading order of the object. 
+      * Sets or retrieves a value that indicates the reading order of the object.
       */
     dir: string;
     /**
-      * Gets an object representing the document type declaration associated with the current document. 
+      * Gets an object representing the document type declaration associated with the current document.
       */
     readonly doctype: DocumentType;
     /**
-      * Gets a reference to the root node of the document. 
+      * Gets a reference to the root node of the document.
       */
     documentElement: HTMLElement;
     /**
-      * Sets or gets the security domain of the document. 
+      * Sets or gets the security domain of the document.
       */
     domain: string;
     /**
@@ -2382,7 +2382,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     images: HTMLCollectionOf<HTMLImageElement>;
     /**
-      * Gets the implementation object of the current document. 
+      * Gets the implementation object of the current document.
       */
     readonly implementation: DOMImplementation;
     /**
@@ -2390,11 +2390,11 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     readonly inputEncoding: string | null;
     /**
-      * Gets the date that the page was last modified, if the page supplies one. 
+      * Gets the date that the page was last modified, if the page supplies one.
       */
     readonly lastModified: string;
     /**
-      * Sets or gets the color of the document links. 
+      * Sets or gets the color of the document links.
       */
     linkColor: string;
     /**
@@ -2402,7 +2402,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     links: HTMLCollectionOf<HTMLAnchorElement | HTMLAreaElement>;
     /**
-      * Contains information about the current URL. 
+      * Contains information about the current URL.
       */
     readonly location: Location;
     msCSSOMElementFloatMetrics: boolean;
@@ -2427,19 +2427,19 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       * @param ev The event.
       */
     onbeforedeactivate: (ev: UIEvent) => any;
-    /** 
-      * Fires when the object loses the input focus. 
+    /**
+      * Fires when the object loses the input focus.
       * @param ev The focus event.
       */
     onblur: (ev: FocusEvent) => any;
     /**
-      * Occurs when playback is possible, but would require further buffering. 
+      * Occurs when playback is possible, but would require further buffering.
       * @param ev The event.
       */
     oncanplay: (ev: Event) => any;
     oncanplaythrough: (ev: Event) => any;
     /**
-      * Fires when the contents of the object or selection have changed. 
+      * Fires when the contents of the object or selection have changed.
       * @param ev The event.
       */
     onchange: (ev: Event) => any;
@@ -2449,7 +2449,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     onclick: (ev: MouseEvent) => any;
     /**
-      * Fires when the user clicks the right mouse button in the client area, opening the context menu. 
+      * Fires when the user clicks the right mouse button in the client area, opening the context menu.
       * @param ev The mouse event.
       */
     oncontextmenu: (ev: PointerEvent) => any;
@@ -2473,12 +2473,12 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       * @param ev The event.
       */
     ondragend: (ev: DragEvent) => any;
-    /** 
+    /**
       * Fires on the target element when the user drags the object to a valid drop target.
       * @param ev The drag event.
       */
     ondragenter: (ev: DragEvent) => any;
-    /** 
+    /**
       * Fires on the target object when the user moves the mouse out of a valid drop target during a drag operation.
       * @param ev The drag event.
       */
@@ -2489,23 +2489,23 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     ondragover: (ev: DragEvent) => any;
     /**
-      * Fires on the source object when the user starts to drag a text selection or selected object. 
+      * Fires on the source object when the user starts to drag a text selection or selected object.
       * @param ev The event.
       */
     ondragstart: (ev: DragEvent) => any;
     ondrop: (ev: DragEvent) => any;
     /**
-      * Occurs when the duration attribute is updated. 
+      * Occurs when the duration attribute is updated.
       * @param ev The event.
       */
     ondurationchange: (ev: Event) => any;
     /**
-      * Occurs when the media element is reset to its initial state. 
+      * Occurs when the media element is reset to its initial state.
       * @param ev The event.
       */
     onemptied: (ev: Event) => any;
     /**
-      * Occurs when the end of playback is reached. 
+      * Occurs when the end of playback is reached.
       * @param ev The event
       */
     onended: (ev: MediaStreamErrorEvent) => any;
@@ -2515,7 +2515,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     onerror: (ev: ErrorEvent) => any;
     /**
-      * Fires when the object receives focus. 
+      * Fires when the object receives focus.
       * @param ev The event.
       */
     onfocus: (ev: FocusEvent) => any;
@@ -2539,12 +2539,12 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     onkeyup: (ev: KeyboardEvent) => any;
     /**
-      * Fires immediately after the browser loads the object. 
+      * Fires immediately after the browser loads the object.
       * @param ev The event.
       */
     onload: (ev: Event) => any;
     /**
-      * Occurs when media data is loaded at the current playback position. 
+      * Occurs when media data is loaded at the current playback position.
       * @param ev The event.
       */
     onloadeddata: (ev: Event) => any;
@@ -2554,22 +2554,22 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     onloadedmetadata: (ev: Event) => any;
     /**
-      * Occurs when Internet Explorer begins looking for media data. 
+      * Occurs when Internet Explorer begins looking for media data.
       * @param ev The event.
       */
     onloadstart: (ev: Event) => any;
     /**
-      * Fires when the user clicks the object with either mouse button. 
+      * Fires when the user clicks the object with either mouse button.
       * @param ev The mouse event.
       */
     onmousedown: (ev: MouseEvent) => any;
     /**
-      * Fires when the user moves the mouse over the object. 
+      * Fires when the user moves the mouse over the object.
       * @param ev The mouse event.
       */
     onmousemove: (ev: MouseEvent) => any;
     /**
-      * Fires when the user moves the mouse pointer outside the boundaries of the object. 
+      * Fires when the user moves the mouse pointer outside the boundaries of the object.
       * @param ev The mouse event.
       */
     onmouseout: (ev: MouseEvent) => any;
@@ -2579,12 +2579,12 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     onmouseover: (ev: MouseEvent) => any;
     /**
-      * Fires when the user releases a mouse button while the mouse is over the object. 
+      * Fires when the user releases a mouse button while the mouse is over the object.
       * @param ev The mouse event.
       */
     onmouseup: (ev: MouseEvent) => any;
     /**
-      * Fires when the wheel button is rotated. 
+      * Fires when the wheel button is rotated.
       * @param ev The mouse event
       */
     onmousewheel: (ev: WheelEvent) => any;
@@ -2606,7 +2606,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
     onmspointerover: (ev: MSPointerEvent) => any;
     onmspointerup: (ev: MSPointerEvent) => any;
     /**
-      * Occurs when an item is removed from a Jump List of a webpage running in Site Mode. 
+      * Occurs when an item is removed from a Jump List of a webpage running in Site Mode.
       * @param ev The event.
       */
     onmssitemodejumplistitemremoved: (ev: MSSiteModeEvent) => any;
@@ -2621,24 +2621,24 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     onpause: (ev: Event) => any;
     /**
-      * Occurs when the play method is requested. 
+      * Occurs when the play method is requested.
       * @param ev The event.
       */
     onplay: (ev: Event) => any;
     /**
-      * Occurs when the audio or video has started playing. 
+      * Occurs when the audio or video has started playing.
       * @param ev The event.
       */
     onplaying: (ev: Event) => any;
     onpointerlockchange: (ev: Event) => any;
     onpointerlockerror: (ev: Event) => any;
     /**
-      * Occurs to indicate progress while downloading media data. 
+      * Occurs to indicate progress while downloading media data.
       * @param ev The event.
       */
     onprogress: (ev: ProgressEvent) => any;
     /**
-      * Occurs when the playback rate is increased or decreased. 
+      * Occurs when the playback rate is increased or decreased.
       * @param ev The event.
       */
     onratechange: (ev: Event) => any;
@@ -2648,22 +2648,22 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     onreadystatechange: (ev: ProgressEvent) => any;
     /**
-      * Fires when the user resets a form. 
+      * Fires when the user resets a form.
       * @param ev The event.
       */
     onreset: (ev: Event) => any;
     /**
-      * Fires when the user repositions the scroll box in the scroll bar on the object. 
+      * Fires when the user repositions the scroll box in the scroll bar on the object.
       * @param ev The event.
       */
     onscroll: (ev: UIEvent) => any;
     /**
-      * Occurs when the seek operation ends. 
+      * Occurs when the seek operation ends.
       * @param ev The event.
       */
     onseeked: (ev: Event) => any;
     /**
-      * Occurs when the current playback position is moved. 
+      * Occurs when the current playback position is moved.
       * @param ev The event.
       */
     onseeking: (ev: Event) => any;
@@ -2679,7 +2679,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
     onselectionchange: (ev: Event) => any;
     onselectstart: (ev: Event) => any;
     /**
-      * Occurs when the download has stopped. 
+      * Occurs when the download has stopped.
       * @param ev The event.
       */
     onstalled: (ev: Event) => any;
@@ -2690,7 +2690,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
     onstop: (ev: Event) => any;
     onsubmit: (ev: Event) => any;
     /**
-      * Occurs if the load operation has been intentionally halted. 
+      * Occurs if the load operation has been intentionally halted.
       * @param ev The event.
       */
     onsuspend: (ev: Event) => any;
@@ -2709,7 +2709,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     onvolumechange: (ev: Event) => any;
     /**
-      * Occurs when playback stops because the next frame of a video resource is not available. 
+      * Occurs when playback stops because the next frame of a video resource is not available.
       * @param ev The event.
       */
     onwaiting: (ev: Event) => any;
@@ -2743,7 +2743,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     title: string;
     readonly visibilityState: string;
-    /** 
+    /**
       * Sets or gets the color of the links that the user has visited.
       */
     vlinkColor: string;
@@ -2933,7 +2933,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
     createExpression(expression: string, resolver: XPathNSResolver): XPathExpression;
     createNSResolver(nodeResolver: Node): XPathNSResolver;
     /**
-      * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document. 
+      * Creates a NodeIterator object that you can use to traverse filtered lists of nodes or elements in a document.
       * @param root The root element or node to start traversing on.
       * @param whatToShow The type of nodes or elements to appear in the node list
       * @param filter A custom NodeFilter function to use. For more information, see filter. Use null for no filter.
@@ -2942,11 +2942,11 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
     createNodeIterator(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): NodeIterator;
     createProcessingInstruction(target: string, data: string): ProcessingInstruction;
     /**
-      *  Returns an empty range object that has both of its boundary points positioned at the beginning of the document. 
+      *  Returns an empty range object that has both of its boundary points positioned at the beginning of the document.
       */
     createRange(): Range;
     /**
-      * Creates a text string from the specified value. 
+      * Creates a text string from the specified value.
       * @param data String that specifies the nodeValue property of the text node.
       */
     createTextNode(data: string): Text;
@@ -2961,7 +2961,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       */
     createTreeWalker(root: Node, whatToShow?: number, filter?: NodeFilter, entityReferenceExpansion?: boolean): TreeWalker;
     /**
-      * Returns the element for the specified x coordinate and the specified y coordinate. 
+      * Returns the element for the specified x coordinate and the specified y coordinate.
       * @param x The x-offset
       * @param y The y-offset
       */
@@ -3199,7 +3199,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
       * @param replace Specifies whether the existing entry for the document is replaced in the history list.
       */
     open(url?: string, name?: string, features?: string, replace?: boolean): Document;
-    /** 
+    /**
       * Returns a Boolean value that indicates whether a specified command can be successfully executed using execCommand, given the current state of the document.
       * @param commandId Specifies a command identifier.
       */
@@ -3221,7 +3221,7 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
     queryCommandSupported(commandId: string): boolean;
     /**
       * Retrieves the string associated with a command.
-      * @param commandId String that contains the identifier of a command. This can be any command identifier given in the list of Command Identifiers. 
+      * @param commandId String that contains the identifier of a command. This can be any command identifier given in the list of Command Identifiers.
       */
     queryCommandText(commandId: string): string;
     /**
@@ -3237,12 +3237,12 @@ interface Document extends Node, GlobalEventHandlers, NodeSelector, DocumentEven
     webkitCancelFullScreen(): void;
     webkitExitFullscreen(): void;
     /**
-      * Writes one or more HTML expressions to a document in the specified window. 
+      * Writes one or more HTML expressions to a document in the specified window.
       * @param content Specifies the text and HTML tags to write.
       */
     write(...content: string[]): void;
     /**
-      * Writes one or more HTML expressions, followed by a carriage return, to a document in the specified window. 
+      * Writes one or more HTML expressions, followed by a carriage return, to a document in the specified window.
       * @param content The text and HTML tags to write.
       */
     writeln(...content: string[]): void;
@@ -3971,12 +3971,12 @@ interface HTMLAnchorElement extends HTMLElement {
       */
     target: string;
     /**
-      * Retrieves or sets the text of the object as a string. 
+      * Retrieves or sets the text of the object as a string.
       */
     text: string;
     type: string;
     urn: string;
-    /** 
+    /**
       * Returns a string representation of an object.
       */
     toString(): string;
@@ -4078,7 +4078,7 @@ interface HTMLAreaElement extends HTMLElement {
       */
     host: string;
     /**
-      * Sets or retrieves the host name part of the location or URL. 
+      * Sets or retrieves the host name part of the location or URL.
       */
     hostname: string;
     /**
@@ -4114,7 +4114,7 @@ interface HTMLAreaElement extends HTMLElement {
       * Sets or retrieves the window or frame at which to target content.
       */
     target: string;
-    /** 
+    /**
       * Returns a string representation of an object.
       */
     toString(): string;
@@ -4380,7 +4380,7 @@ interface HTMLButtonElement extends HTMLElement {
       * Overrides the target attribute on a form element.
       */
     formTarget: string;
-    /** 
+    /**
       * Sets or retrieves the name of the object.
       */
     name: string;
@@ -4397,7 +4397,7 @@ interface HTMLButtonElement extends HTMLElement {
       * Returns a  ValidityState object that represents the validity states of an element.
       */
     readonly validity: ValidityState;
-    /** 
+    /**
       * Sets or retrieves the default or selected value of the control.
       */
     value: string;
@@ -4504,7 +4504,7 @@ declare var HTMLDirectoryElement: {
 
 interface HTMLDivElement extends HTMLElement {
     /**
-      * Sets or retrieves how the object is aligned with adjacent text. 
+      * Sets or retrieves how the object is aligned with adjacent text.
       */
     align: string;
     /**
@@ -5647,7 +5647,7 @@ interface HTMLInputElement extends HTMLElement {
       */
     readonly files: FileList | null;
     /**
-      * Retrieves a reference to the form that the object is embedded in. 
+      * Retrieves a reference to the form that the object is embedded in.
       */
     readonly form: HTMLFormElement;
     /**
@@ -6367,7 +6367,7 @@ interface HTMLMetaElement extends HTMLElement {
       */
     scheme: string;
     /**
-      * Sets or retrieves the URL property that will be loaded after the specified time has elapsed. 
+      * Sets or retrieves the URL property that will be loaded after the specified time has elapsed.
       */
     url: string;
 }
@@ -6630,7 +6630,7 @@ declare var HTMLOptionsCollection: {
 
 interface HTMLParagraphElement extends HTMLElement {
     /**
-      * Sets or retrieves how the object is aligned with adjacent text. 
+      * Sets or retrieves how the object is aligned with adjacent text.
       */
     align: string;
     clear: string;
@@ -6732,10 +6732,10 @@ interface HTMLScriptElement extends HTMLElement {
       */
     defer: boolean;
     /**
-      * Sets or retrieves the event for which the script is written. 
+      * Sets or retrieves the event for which the script is written.
       */
     event: string;
-    /** 
+    /**
       * Sets or retrieves the object that is bound to the event script.
       */
     htmlFor: string;
@@ -6744,7 +6744,7 @@ interface HTMLScriptElement extends HTMLElement {
       */
     src: string;
     /**
-      * Retrieves or sets the text of the object as a string. 
+      * Retrieves or sets the text of the object as a string.
       */
     text: string;
     /**
@@ -6765,7 +6765,7 @@ interface HTMLSelectElement extends HTMLElement {
     autofocus: boolean;
     disabled: boolean;
     /**
-      * Retrieves a reference to the form that the object is embedded in. 
+      * Retrieves a reference to the form that the object is embedded in.
       */
     readonly form: HTMLFormElement;
     /**
@@ -6791,7 +6791,7 @@ interface HTMLSelectElement extends HTMLElement {
     selectedIndex: number;
     selectedOptions: HTMLCollectionOf<HTMLOptionElement>;
     /**
-      * Sets or retrieves the number of rows in the list box. 
+      * Sets or retrieves the number of rows in the list box.
       */
     size: number;
     /**
@@ -6817,7 +6817,7 @@ interface HTMLSelectElement extends HTMLElement {
     /**
       * Adds an element to the areas, controlRange, or options collection.
       * @param element Variant of type Number that specifies the index position in the collection where the element is placed. If no value is given, the method places the element at the end of the collection.
-      * @param before Variant of type Object that specifies an element to insert before, or null to append the object to the collection. 
+      * @param before Variant of type Object that specifies an element to insert before, or null to append the object to the collection.
       */
     add(element: HTMLElement, before?: HTMLElement | number): void;
     /**
@@ -7012,7 +7012,7 @@ interface HTMLTableElement extends HTMLElement {
       */
     border: string;
     /**
-      * Sets or retrieves the border color of the object. 
+      * Sets or retrieves the border color of the object.
       */
     borderColor: any;
     /**
@@ -7307,7 +7307,7 @@ declare var HTMLTextAreaElement: {
 
 interface HTMLTitleElement extends HTMLElement {
     /**
-      * Retrieves or sets the text of the object as a string. 
+      * Retrieves or sets the text of the object as a string.
       */
     text: string;
 }
@@ -13985,7 +13985,7 @@ interface Canvas2DContextAttributes {
     alpha?: boolean;
     willReadFrequently?: boolean;
     storage?: boolean;
-    [attribute: string]: boolean | string;
+    [attribute: string]: boolean | string | undefined;
 }
 
 interface NodeListOf<TNode extends Node> extends NodeList {

From dfed7625afc06738f249c3536195590abdd13457 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Sat, 18 Jun 2016 12:40:22 -0700
Subject: [PATCH 325/332] Add libcheck tests

---
 src/harness/harness.ts                                 | 2 +-
 tests/baselines/reference/verifyDefaultLib_dom.js      | 6 ++++++
 tests/baselines/reference/verifyDefaultLib_dom.symbols | 6 ++++++
 tests/baselines/reference/verifyDefaultLib_dom.types   | 6 ++++++
 tests/cases/compiler/verifyDefaultLib_dom.ts           | 7 +++++++
 tests/cases/compiler/verifyDefaultLib_webworker.ts     | 7 +++++++
 6 files changed, 33 insertions(+), 1 deletion(-)
 create mode 100644 tests/baselines/reference/verifyDefaultLib_dom.js
 create mode 100644 tests/baselines/reference/verifyDefaultLib_dom.symbols
 create mode 100644 tests/baselines/reference/verifyDefaultLib_dom.types
 create mode 100644 tests/cases/compiler/verifyDefaultLib_dom.ts
 create mode 100644 tests/cases/compiler/verifyDefaultLib_webworker.ts

diff --git a/src/harness/harness.ts b/src/harness/harness.ts
index f804dc4eb6a..0b4a58260ec 100644
--- a/src/harness/harness.ts
+++ b/src/harness/harness.ts
@@ -1051,7 +1051,7 @@ namespace Harness {
             options.target = options.target || ts.ScriptTarget.ES3;
             options.newLine = options.newLine || ts.NewLineKind.CarriageReturnLineFeed;
             options.noErrorTruncation = true;
-            options.skipDefaultLibCheck = true;
+            options.skipDefaultLibCheck = typeof options.skipDefaultLibCheck === "undefined" ? true : options.skipDefaultLibCheck;
 
             if (typeof currentDirectory === "undefined") {
                 currentDirectory = Harness.IO.getCurrentDirectory();
diff --git a/tests/baselines/reference/verifyDefaultLib_dom.js b/tests/baselines/reference/verifyDefaultLib_dom.js
new file mode 100644
index 00000000000..b65e133572a
--- /dev/null
+++ b/tests/baselines/reference/verifyDefaultLib_dom.js
@@ -0,0 +1,6 @@
+//// [verifyDefaultLib_dom.ts]
+
+var x: HTMLElement;
+
+//// [verifyDefaultLib_dom.js]
+var x;
diff --git a/tests/baselines/reference/verifyDefaultLib_dom.symbols b/tests/baselines/reference/verifyDefaultLib_dom.symbols
new file mode 100644
index 00000000000..53502b040c3
--- /dev/null
+++ b/tests/baselines/reference/verifyDefaultLib_dom.symbols
@@ -0,0 +1,6 @@
+=== tests/cases/compiler/verifyDefaultLib_dom.ts ===
+
+var x: HTMLElement;
+>x : Symbol(x, Decl(verifyDefaultLib_dom.ts, 1, 3))
+>HTMLElement : Symbol(HTMLElement, Decl(lib.dom.d.ts, --, --), Decl(lib.dom.d.ts, --, --))
+
diff --git a/tests/baselines/reference/verifyDefaultLib_dom.types b/tests/baselines/reference/verifyDefaultLib_dom.types
new file mode 100644
index 00000000000..aafd063846d
--- /dev/null
+++ b/tests/baselines/reference/verifyDefaultLib_dom.types
@@ -0,0 +1,6 @@
+=== tests/cases/compiler/verifyDefaultLib_dom.ts ===
+
+var x: HTMLElement;
+>x : HTMLElement
+>HTMLElement : HTMLElement
+
diff --git a/tests/cases/compiler/verifyDefaultLib_dom.ts b/tests/cases/compiler/verifyDefaultLib_dom.ts
new file mode 100644
index 00000000000..519485320ae
--- /dev/null
+++ b/tests/cases/compiler/verifyDefaultLib_dom.ts
@@ -0,0 +1,7 @@
+// @strictNullChecks: true
+// @noImplicitAny: true
+// @noImplicitThis: true
+// @skipDefaultLibCheck: false
+// @lib: es2015,es2016,es2017,dom,scripthost
+
+var x: HTMLElement;
\ No newline at end of file
diff --git a/tests/cases/compiler/verifyDefaultLib_webworker.ts b/tests/cases/compiler/verifyDefaultLib_webworker.ts
new file mode 100644
index 00000000000..7da62387d2f
--- /dev/null
+++ b/tests/cases/compiler/verifyDefaultLib_webworker.ts
@@ -0,0 +1,7 @@
+// @strictNullChecks: true
+// @noImplicitAny: true
+// @noImplicitThis: true
+// @skipDefaultLibCheck: false
+// @lib: es2015,es2016,es2017,webworker
+
+var x: Worker;
\ No newline at end of file

From 634818cbac8a064dd5efac3c90859fa0d7d6e7f0 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Sat, 18 Jun 2016 20:35:52 -0700
Subject: [PATCH 326/332] Add missing worker types

---
 src/lib/webworker.generated.d.ts | 24 ++++++++++++++++++++++--
 1 file changed, 22 insertions(+), 2 deletions(-)

diff --git a/src/lib/webworker.generated.d.ts b/src/lib/webworker.generated.d.ts
index 6db86d71b2a..56c8cc84367 100644
--- a/src/lib/webworker.generated.d.ts
+++ b/src/lib/webworker.generated.d.ts
@@ -3,6 +3,10 @@
 /// IE Worker APIs
 /////////////////////////////
 
+interface Algorithm {
+    name: string;
+}
+
 interface EventInit {
     bubbles?: boolean;
     cancelable?: boolean;
@@ -18,6 +22,10 @@ interface IDBObjectStoreParameters {
     keyPath?: IDBKeyPath;
 }
 
+interface KeyAlgorithm {
+    name?: string;
+}
+
 interface EventListener {
     (evt: Event): void;
 }
@@ -107,6 +115,18 @@ declare var Coordinates: {
     new(): Coordinates;
 }
 
+interface CryptoKey {
+    readonly algorithm: KeyAlgorithm;
+    readonly extractable: boolean;
+    readonly type: string;
+    readonly usages: string[];
+}
+
+declare var CryptoKey: {
+    prototype: CryptoKey;
+    new(): CryptoKey;
+}
+
 interface DOMError {
     readonly name: string;
     toString(): string;
@@ -1178,7 +1198,7 @@ declare var console: Console;
 declare function addEventListener(type: "error", listener: (ev: ErrorEvent) => any, useCapture?: boolean): void;
 declare function addEventListener(type: "message", listener: (ev: MessageEvent) => any, useCapture?: boolean): void;
 declare function addEventListener(type: string, listener: EventListenerOrEventListenerObject, useCapture?: boolean): void;
+type AlgorithmIdentifier = string | Algorithm;
 type IDBKeyPath = string;
 type IDBValidKey = number | string | Date | IDBArrayKey;
-type BufferSource = ArrayBuffer | ArrayBufferView;
-type MouseWheelEvent = WheelEvent;
\ No newline at end of file
+type BufferSource = ArrayBuffer | ArrayBufferView;
\ No newline at end of file

From 5697d21a580b3b0048327e05c8bb08e39b8257b8 Mon Sep 17 00:00:00 2001
From: Mohamed Hegazy <mhegazy@microsoft.com>
Date: Mon, 20 Jun 2016 00:19:42 -0700
Subject: [PATCH 327/332] Accept webworker baselines

---
 tests/baselines/reference/verifyDefaultLib_webworker.js     | 6 ++++++
 .../baselines/reference/verifyDefaultLib_webworker.symbols  | 6 ++++++
 tests/baselines/reference/verifyDefaultLib_webworker.types  | 6 ++++++
 3 files changed, 18 insertions(+)
 create mode 100644 tests/baselines/reference/verifyDefaultLib_webworker.js
 create mode 100644 tests/baselines/reference/verifyDefaultLib_webworker.symbols
 create mode 100644 tests/baselines/reference/verifyDefaultLib_webworker.types

diff --git a/tests/baselines/reference/verifyDefaultLib_webworker.js b/tests/baselines/reference/verifyDefaultLib_webworker.js
new file mode 100644
index 00000000000..515b5d9632f
--- /dev/null
+++ b/tests/baselines/reference/verifyDefaultLib_webworker.js
@@ -0,0 +1,6 @@
+//// [verifyDefaultLib_webworker.ts]
+
+var x: Worker;
+
+//// [verifyDefaultLib_webworker.js]
+var x;
diff --git a/tests/baselines/reference/verifyDefaultLib_webworker.symbols b/tests/baselines/reference/verifyDefaultLib_webworker.symbols
new file mode 100644
index 00000000000..ac27e7c83dc
--- /dev/null
+++ b/tests/baselines/reference/verifyDefaultLib_webworker.symbols
@@ -0,0 +1,6 @@
+=== tests/cases/compiler/verifyDefaultLib_webworker.ts ===
+
+var x: Worker;
+>x : Symbol(x, Decl(verifyDefaultLib_webworker.ts, 1, 3))
+>Worker : Symbol(Worker, Decl(lib.webworker.d.ts, --, --), Decl(lib.webworker.d.ts, --, --))
+
diff --git a/tests/baselines/reference/verifyDefaultLib_webworker.types b/tests/baselines/reference/verifyDefaultLib_webworker.types
new file mode 100644
index 00000000000..38accb39842
--- /dev/null
+++ b/tests/baselines/reference/verifyDefaultLib_webworker.types
@@ -0,0 +1,6 @@
+=== tests/cases/compiler/verifyDefaultLib_webworker.ts ===
+
+var x: Worker;
+>x : Worker
+>Worker : Worker
+

From c0eb472b62e0552b602b64baf8124c39af1e2582 Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 20 Jun 2016 08:27:41 -0700
Subject: [PATCH 328/332] Classify `this` in parameter position as a keyword

---
 src/services/services.ts                       |  3 ++-
 tests/cases/fourslash/classifyThisParameter.ts | 13 +++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)
 create mode 100644 tests/cases/fourslash/classifyThisParameter.ts

diff --git a/src/services/services.ts b/src/services/services.ts
index 983ddfbf250..5dd73abe82f 100644
--- a/src/services/services.ts
+++ b/src/services/services.ts
@@ -7533,7 +7533,8 @@ namespace ts {
                                 return;
                             case SyntaxKind.Parameter:
                                 if ((<ParameterDeclaration>token.parent).name === token) {
-                                    return ClassificationType.parameterName;
+                                    const isThis = token.kind === SyntaxKind.Identifier && (<Identifier>token).originalKeywordKind === SyntaxKind.ThisKeyword;
+                                    return isThis ? ClassificationType.keyword : ClassificationType.parameterName;
                                 }
                                 return;
                         }
diff --git a/tests/cases/fourslash/classifyThisParameter.ts b/tests/cases/fourslash/classifyThisParameter.ts
new file mode 100644
index 00000000000..5e0c9a9d4b6
--- /dev/null
+++ b/tests/cases/fourslash/classifyThisParameter.ts
@@ -0,0 +1,13 @@
+/// <reference path="fourslash.ts"/>
+
+////function f(this){}
+
+var c = classification;
+verify.syntacticClassificationsAre(
+    c.keyword("function"),
+    c.identifier("f"),
+    c.punctuation("("),
+    c.keyword("this"),
+    c.punctuation(")"),
+    c.punctuation("{"),
+    c.punctuation("}"));

From f73ed594327eeef48e391f2daebea83e32ca5170 Mon Sep 17 00:00:00 2001
From: Richard Knoll <riknoll@microsoft.com>
Date: Mon, 20 Jun 2016 11:09:48 -0700
Subject: [PATCH 329/332] Adding more matchFiles test cases

---
 tests/cases/unittests/matchFiles.ts | 189 ++++++++++++++++++++++++++++
 1 file changed, 189 insertions(+)

diff --git a/tests/cases/unittests/matchFiles.ts b/tests/cases/unittests/matchFiles.ts
index c2d13cf0393..b9c538a9e14 100644
--- a/tests/cases/unittests/matchFiles.ts
+++ b/tests/cases/unittests/matchFiles.ts
@@ -65,6 +65,16 @@ namespace ts {
         "c:/dev/f.other"
     ]);
 
+    const caseInsensitiveCommonFoldersHost = new Utils.MockParseConfigHost(caseInsensitiveBasePath, /*useCaseSensitiveFileNames*/ false, [
+        "c:/dev/a.ts",
+        "c:/dev/a.d.ts",
+        "c:/dev/a.js",
+        "c:/dev/b.ts",
+        "c:/dev/node_modules/a.ts",
+        "c:/dev/bower_components/a.ts",
+        "c:/dev/jspm_packages/a.ts"
+    ]);
+
     describe("matchFiles", () => {
         describe("with literal file list", () => {
             it("without exclusions", () => {
@@ -297,6 +307,87 @@ namespace ts {
                 assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
                 assert.deepEqual(actual.errors, expected.errors);
             });
+            it("with common package folders and no exclusions", () => {
+                const json = {
+                    include: [
+                        "a.ts",
+                        "b.ts",
+                        "node_modules/a.ts",
+                        "bower_components/a.ts",
+                        "jspm_packages/a.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/b.ts"
+                    ],
+                    wildcardDirectories: {},
+                };
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
+                assert.deepEqual(actual.fileNames, expected.fileNames);
+                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+                assert.deepEqual(actual.errors, expected.errors);
+            });
+            it("with common package folders and exclusions", () => {
+                const json = {
+                    include: [
+                        "a.ts",
+                        "b.ts",
+                        "node_modules/a.ts",
+                        "bower_components/a.ts",
+                        "jspm_packages/a.ts"
+                    ],
+                    exclude: [
+                        "a.ts",
+                        "b.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/bower_components/a.ts",
+                        "c:/dev/jspm_packages/a.ts",
+                        "c:/dev/node_modules/a.ts"
+                    ],
+                    wildcardDirectories: {},
+                };
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
+                assert.deepEqual(actual.fileNames, expected.fileNames);
+                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+                assert.deepEqual(actual.errors, expected.errors);
+            });
+            it("with common package folders and empty exclude", () => {
+                const json = {
+                    include: [
+                        "a.ts",
+                        "b.ts",
+                        "node_modules/a.ts",
+                        "bower_components/a.ts",
+                        "jspm_packages/a.ts"
+                    ],
+                    exclude: <string[]>[]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/b.ts",
+                        "c:/dev/bower_components/a.ts",
+                        "c:/dev/jspm_packages/a.ts",
+                        "c:/dev/node_modules/a.ts"
+                    ],
+                    wildcardDirectories: {},
+                };
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
+                assert.deepEqual(actual.fileNames, expected.fileNames);
+                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+                assert.deepEqual(actual.errors, expected.errors);
+            });
         });
 
         describe("with wildcard include list", () => {
@@ -392,6 +483,32 @@ namespace ts {
                 assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
                 assert.deepEqual(actual.errors, expected.errors);
             });
+            it("with multiple recursive directories", () => {
+                const json = {
+                    include: [
+                        "x/y/**/a.ts",
+                        "x/**/a.ts",
+                        "z/**/a.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/x/a.ts",
+                        "c:/dev/x/y/a.ts",
+                        "c:/dev/z/a.ts"
+                    ],
+                    wildcardDirectories: {
+                        "c:/dev/x": ts.WatchDirectoryFlags.Recursive,
+                        "c:/dev/z": ts.WatchDirectoryFlags.Recursive
+                    },
+                };
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveHost, caseInsensitiveBasePath);
+                assert.deepEqual(actual.fileNames, expected.fileNames);
+                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+                assert.deepEqual(actual.errors, expected.errors);
+            });
             it("case sensitive", () => {
                 const json = {
                     include: [
@@ -486,6 +603,78 @@ namespace ts {
                 assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
                 assert.deepEqual(actual.errors, expected.errors);
             });
+            it("with common package folders and no exclusions", () => {
+                const json = {
+                    include: [
+                       "**/a.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/a.ts"
+                    ],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.Recursive
+                    },
+                };
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
+                assert.deepEqual(actual.fileNames, expected.fileNames);
+                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+                assert.deepEqual(actual.errors, expected.errors);
+            });
+            it("with common package folders and exclusions", () => {
+                const json = {
+                    include: [
+                        "**/a.ts"
+                    ],
+                    exclude: [
+                        "a.ts"
+                    ]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/bower_components/a.ts",
+                        "c:/dev/jspm_packages/a.ts",
+                        "c:/dev/node_modules/a.ts"
+                    ],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.Recursive
+                    },
+                };
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
+                assert.deepEqual(actual.fileNames, expected.fileNames);
+                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+                assert.deepEqual(actual.errors, expected.errors);
+            });
+            it("with common package folders and empty exclude", () => {
+                const json = {
+                    include: [
+                        "**/a.ts"
+                    ],
+                    exclude: <string[]>[]
+                };
+                const expected: ts.ParsedCommandLine = {
+                    options: {},
+                    errors: [],
+                    fileNames: [
+                        "c:/dev/a.ts",
+                        "c:/dev/bower_components/a.ts",
+                        "c:/dev/jspm_packages/a.ts",
+                        "c:/dev/node_modules/a.ts"
+                    ],
+                    wildcardDirectories: {
+                        "c:/dev": ts.WatchDirectoryFlags.Recursive
+                    },
+                };
+                const actual = ts.parseJsonConfigFileContent(json, caseInsensitiveCommonFoldersHost, caseInsensitiveBasePath);
+                assert.deepEqual(actual.fileNames, expected.fileNames);
+                assert.deepEqual(actual.wildcardDirectories, expected.wildcardDirectories);
+                assert.deepEqual(actual.errors, expected.errors);
+            });
             it("exclude .js files when allowJs=false", () => {
                 const json = {
                     compilerOptions: {

From 95cfaafdee9127b66535abc22cbe6722ee7dbd3a Mon Sep 17 00:00:00 2001
From: Andy Hanson <anhans@microsoft.com>
Date: Mon, 20 Jun 2016 11:30:48 -0700
Subject: [PATCH 330/332] Use implicit boolean casts; it doesn't hurt
 performance

---
 src/compiler/parser.ts        |  8 ++---
 src/services/navigationBar.ts | 68 +++++++++++++++++------------------
 2 files changed, 38 insertions(+), 38 deletions(-)

diff --git a/src/compiler/parser.ts b/src/compiler/parser.ts
index 6e0a37c3d9f..b2f3755ec46 100644
--- a/src/compiler/parser.ts
+++ b/src/compiler/parser.ts
@@ -17,19 +17,19 @@ namespace ts {
     }
 
     function visitNode<T>(cbNode: (node: Node) => T, node: Node): T {
-        if (node !== void 0) {
+        if (node) {
             return cbNode(node);
         }
     }
 
     function visitNodeArray<T>(cbNodes: (nodes: Node[]) => T, nodes: Node[]) {
-        if (nodes !== void 0) {
+        if (nodes) {
             return cbNodes(nodes);
         }
     }
 
     function visitEachNode<T>(cbNode: (node: Node) => T, nodes: Node[]) {
-        if (nodes !== void 0) {
+        if (nodes) {
             for (const node of nodes) {
                 const result = cbNode(node);
                 if (result) {
@@ -44,7 +44,7 @@ namespace ts {
     // embedded arrays are flattened and the 'cbNode' callback is invoked for each element. If a callback returns
     // a truthy value, iteration stops and that value is returned. Otherwise, undefined is returned.
     export function forEachChild<T>(node: Node, cbNode: (node: Node) => T, cbNodeArray?: (nodes: Node[]) => T): T {
-        if (node === void 0) {
+        if (!node) {
             return;
         }
         // The visitXXX functions could be written as local functions that close over the cbNode and cbNodeArray
diff --git a/src/services/navigationBar.ts b/src/services/navigationBar.ts
index e722f33bc70..bfbaf5a6287 100644
--- a/src/services/navigationBar.ts
+++ b/src/services/navigationBar.ts
@@ -14,17 +14,17 @@ namespace ts.NavigationBar {
         indent: number; // # of parents
     }
 
-    export function getNavigationBarItems(sourceFile_: SourceFile): NavigationBarItem[] {
-        sourceFile = sourceFile_;
+    export function getNavigationBarItems(sourceFile: SourceFile): NavigationBarItem[] {
+        curSourceFile = sourceFile;
         const result = map(topLevelItems(rootNavigationBarNode(sourceFile)), convertToTopLevelItem);
-        sourceFile = void 0;
+        curSourceFile = undefined;
         return result;
     }
 
     // Keep sourceFile handy so we don't have to search for it every time we need to call `getText`.
-    let sourceFile: SourceFile;
+    let curSourceFile: SourceFile;
     function nodeText(node: Node): string {
-        return node.getText(sourceFile);
+        return node.getText(curSourceFile);
     }
 
     function navigationBarNodeKind(n: NavigationBarNode): SyntaxKind {
@@ -32,7 +32,7 @@ namespace ts.NavigationBar {
     }
 
     function pushChild(parent: NavigationBarNode, child: NavigationBarNode): void {
-        if (parent.children !== void 0) {
+        if (parent.children) {
             parent.children.push(child);
         }
         else {
@@ -50,13 +50,13 @@ namespace ts.NavigationBar {
 
     function rootNavigationBarNode(sourceFile: SourceFile): NavigationBarNode {
         Debug.assert(!parentsStack.length);
-        const root: NavigationBarNode = { node: sourceFile, additionalNodes: void 0, parent: void 0, children: void 0, indent: 0 };
+        const root: NavigationBarNode = { node: sourceFile, additionalNodes: undefined, parent: undefined, children: undefined, indent: 0 };
         parent = root;
         for (const statement of sourceFile.statements) {
             addChildrenRecursively(statement);
         }
         endNode();
-        Debug.assert(parent === void 0 && !parentsStack.length);
+        Debug.assert(!parent && !parentsStack.length);
         return root;
     }
 
@@ -67,9 +67,9 @@ namespace ts.NavigationBar {
     function emptyNavigationBarNode(node: Node): NavigationBarNode {
         return {
             node,
-            additionalNodes: void 0,
+            additionalNodes: undefined,
             parent,
-            children: void 0,
+            children: undefined,
             indent: parent.indent + 1
         };
     }
@@ -89,7 +89,7 @@ namespace ts.NavigationBar {
 
     /** Call after calling `startNode` and adding children to it. */
     function endNode(): void {
-        if (parent.children !== void 0) {
+        if (parent.children) {
             mergeChildren(parent.children);
             sortChildren(parent.children);
         }
@@ -104,7 +104,7 @@ namespace ts.NavigationBar {
 
     /** Look for navigation bar items in node's subtree, adding them to the current `parent`. */
     function addChildrenRecursively(node: Node): void {
-        if (node === void 0 || isToken(node)) {
+        if (!node || isToken(node)) {
             return;
         }
 
@@ -142,7 +142,7 @@ namespace ts.NavigationBar {
                 let importClause = <ImportClause>node;
                 // Handle default import case e.g.:
                 //    import d from "mod";
-                if (importClause.name !== void 0) {
+                if (importClause.name) {
                     addLeafNode(importClause);
                 }
 
@@ -150,7 +150,7 @@ namespace ts.NavigationBar {
                 //    import * as NS from "mod";
                 //    import {a, b as B} from "mod";
                 const {namedBindings} = importClause;
-                if (namedBindings !== void 0) {
+                if (namedBindings) {
                     if (namedBindings.kind === SyntaxKind.NamespaceImport) {
                         addLeafNode(<NamespaceImport>namedBindings);
                     }
@@ -169,7 +169,7 @@ namespace ts.NavigationBar {
                 if (isBindingPattern(name)) {
                     addChildrenRecursively(name);
                 }
-                else if (decl.initializer !== void 0 && isFunctionOrClassExpression(decl.initializer)) {
+                else if (decl.initializer && isFunctionOrClassExpression(decl.initializer)) {
                     // For `const x = function() {}`, just use the function node, not the const.
                     addChildrenRecursively(decl.initializer);
                 }
@@ -218,7 +218,7 @@ namespace ts.NavigationBar {
                 break;
 
             default:
-                if (node.jsDocComments !== void 0) {
+                if (node.jsDocComments) {
                     for (const jsDocComment of node.jsDocComments) {
                         for (const tag of jsDocComment.tags) {
                             if (tag.kind === SyntaxKind.JSDocTypedefTag) {
@@ -238,13 +238,13 @@ namespace ts.NavigationBar {
         filterMutate(children, child => {
             const decl = <Declaration>child.node;
             const name = decl.name && nodeText(decl.name);
-            if (name === void 0) {
+            if (!name) {
                 // Anonymous items are never merged.
                 return true;
             }
 
             const itemsWithSameName = getProperty(nameToItems, name);
-            if (itemsWithSameName === void 0) {
+            if (!itemsWithSameName) {
                 nameToItems[name] = child;
                 return true;
             }
@@ -297,12 +297,12 @@ namespace ts.NavigationBar {
         function merge(target: NavigationBarNode, source: NavigationBarNode): void {
             target.additionalNodes = target.additionalNodes || [];
             target.additionalNodes.push(source.node);
-            if (source.additionalNodes !== void 0) {
+            if (source.additionalNodes) {
                 target.additionalNodes.push(...source.additionalNodes);
             }
 
             target.children = concatenate(target.children, source.children);
-            if (target.children !== void 0) {
+            if (target.children) {
                 mergeChildren(target.children);
                 sortChildren(target.children);
             }
@@ -316,17 +316,17 @@ namespace ts.NavigationBar {
 
     function compareChildren(child1: NavigationBarNode, child2: NavigationBarNode): number {
         const name1 = tryGetName(child1.node), name2 = tryGetName(child2.node);
-        if (name1 !== void 0 && name2 !== void 0) {
+        if (name1 && name2) {
             const cmp = localeCompareFix(name1, name2);
             return cmp !== 0 ? cmp : navigationBarNodeKind(child1) - navigationBarNodeKind(child2);
         }
         else {
-            return name1 !== void 0 ? 1 : name2 !== void 0 ? -1 : navigationBarNodeKind(child1) - navigationBarNodeKind(child2);
+            return name1 ? 1 : name2 ? -1 : navigationBarNodeKind(child1) - navigationBarNodeKind(child2);
         }
     }
 
     // More efficient to create a collator once and use its `compare` than to call `a.localeCompare(b)` many times.
-    const collator: { compare(a: string, b: string): number } = typeof Intl === "undefined" ? void 0 : new Intl.Collator();
+    const collator: { compare(a: string, b: string): number } = typeof Intl === "undefined" ? undefined : new Intl.Collator();
     // Intl is missing in Safari, and node 0.10 treats "a" as greater than "B".
     const localeCompareIsCorrect = collator && collator.compare("a", "B") < 0;
     const localeCompareFix: (a: string, b: string) => number = localeCompareIsCorrect ? collator.compare : function(a, b) {
@@ -358,7 +358,7 @@ namespace ts.NavigationBar {
         }
 
         const decl = <Declaration>node;
-        if (decl.name !== void 0) {
+        if (decl.name) {
             return getPropertyNameForPropertyNameNode(decl.name);
         }
         switch (node.kind) {
@@ -369,7 +369,7 @@ namespace ts.NavigationBar {
             case SyntaxKind.JSDocTypedefTag:
                 return getJSDocTypedefTagName(<JSDocTypedefTag>node);
             default:
-                return void 0;
+                return undefined;
         }
     }
 
@@ -379,7 +379,7 @@ namespace ts.NavigationBar {
         }
 
         const name = (<Declaration>node).name;
-        if (name !== void 0) {
+        if (name) {
             const text = nodeText(name);
             if (text.length > 0) {
                 return text;
@@ -418,7 +418,7 @@ namespace ts.NavigationBar {
     }
 
     function getJSDocTypedefTagName(node: JSDocTypedefTag): string {
-        if (node.name !== void 0) {
+        if (node.name) {
             return node.name.text;
         }
         else {
@@ -441,7 +441,7 @@ namespace ts.NavigationBar {
         function recur(item: NavigationBarNode) {
             if (isTopLevel(item)) {
                 topLevel.push(item);
-                if (item.children !== void 0) {
+                if (item.children) {
                     for (const child of item.children) {
                         recur(child);
                     }
@@ -478,7 +478,7 @@ namespace ts.NavigationBar {
                     return false;
             }
             function isTopLevelFunctionDeclaration(item: NavigationBarNode): boolean {
-                if ((<FunctionDeclaration>item.node).body === void 0) {
+                if (!(<FunctionDeclaration>item.node).body) {
                     return false;
                 }
 
@@ -531,7 +531,7 @@ namespace ts.NavigationBar {
 
         function getSpans(n: NavigationBarNode): TextSpan[] {
             const spans = [getNodeSpan(n.node)];
-            if (n.additionalNodes !== void 0) {
+            if (n.additionalNodes) {
                 for (const node of n.additionalNodes) {
                     spans.push(getNodeSpan(node));
                 }
@@ -562,7 +562,7 @@ namespace ts.NavigationBar {
                     while (variableDeclarationNode && variableDeclarationNode.kind !== SyntaxKind.VariableDeclaration) {
                         variableDeclarationNode = variableDeclarationNode.parent;
                     }
-                    Debug.assert(variableDeclarationNode !== void 0);
+                    Debug.assert(!!variableDeclarationNode);
                 }
                 else {
                     Debug.assert(!isBindingPattern((<VariableDeclaration>node).name));
@@ -620,17 +620,17 @@ namespace ts.NavigationBar {
     }
 
     function isComputedProperty(member: EnumMember): boolean {
-        return member.name === void 0 || member.name.kind === SyntaxKind.ComputedPropertyName;
+        return !member.name || member.name.kind === SyntaxKind.ComputedPropertyName;
     }
 
     function getNodeSpan(node: Node): TextSpan {
         return node.kind === SyntaxKind.SourceFile
             ? createTextSpanFromBounds(node.getFullStart(), node.getEnd())
-            : createTextSpanFromBounds(node.getStart(sourceFile), node.getEnd());
+            : createTextSpanFromBounds(node.getStart(curSourceFile), node.getEnd());
     }
 
     function getFunctionOrClassName(node: FunctionExpression | FunctionDeclaration | ArrowFunction | ClassLikeDeclaration): string {
-        if (node.name !== void 0 && getFullWidth(node.name) > 0) {
+        if (node.name && getFullWidth(node.name) > 0) {
             return declarationNameToString(node.name);
         }
         // See if it is a var initializer. If so, use the var name.

From d9bd31fc5288577100718c2d2278705b12dd0342 Mon Sep 17 00:00:00 2001
From: zhengbli <zhengbli@microsoft.com>
Date: Mon, 20 Jun 2016 12:39:07 -0700
Subject: [PATCH 331/332] Use getCanonicalFileName

---
 src/compiler/utilities.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/utilities.ts b/src/compiler/utilities.ts
index f4b9592043e..b4ef62c6c3e 100644
--- a/src/compiler/utilities.ts
+++ b/src/compiler/utilities.ts
@@ -2331,7 +2331,7 @@ namespace ts {
     export function getSourceFilePathInNewDir(sourceFile: SourceFile, host: EmitHost, newDirPath: string) {
         let sourceFilePath = getNormalizedAbsolutePath(sourceFile.fileName, host.getCurrentDirectory());
         const commonSourceDirectory = host.getCommonSourceDirectory();
-        const isSourceFileInCommonSourceDirectory = sourceFilePath.toLowerCase().indexOf(commonSourceDirectory.toLowerCase()) === 0;
+        const isSourceFileInCommonSourceDirectory = host.getCanonicalFileName(sourceFilePath).indexOf(host.getCanonicalFileName(commonSourceDirectory)) === 0;
         sourceFilePath = isSourceFileInCommonSourceDirectory ? sourceFilePath.substring(commonSourceDirectory.length) : sourceFilePath;
         return combinePaths(newDirPath, sourceFilePath);
     }

From 8e489cb2a44d2dc7491a7ac760482edd432c86e3 Mon Sep 17 00:00:00 2001
From: Basarat Ali Syed <basaratali@gmail.com>
Date: Tue, 21 Jun 2016 11:45:42 +1000
Subject: [PATCH 332/332] export interface used by other exported functions

---
 src/compiler/core.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/compiler/core.ts b/src/compiler/core.ts
index ed171b720d0..4aba46c7839 100644
--- a/src/compiler/core.ts
+++ b/src/compiler/core.ts
@@ -1001,7 +1001,7 @@ namespace ts {
         directories: string[];
     }
 
-    interface FileMatcherPatterns {
+    export interface FileMatcherPatterns {
         includeFilePattern: string;
         includeDirectoryPattern: string;
         excludePattern: string;